JPWO2006054563A1 - Tube, tube with reflector and lighting device - Google Patents

Abstract

The present invention relates to a halogen light bulb incorporated in a reflecting mirror. An object of the present invention is to reduce the size of the filament and improve the light collection efficiency. The halogen light bulb of the present invention has a bulb and a plurality of filament elements (131-134). Each filament element is composed of a single coil, and its axis is parallel to the optical axis of the reflecting mirror. One of the plurality of filament elements (center filament element, 131) is disposed on the optical axis of the reflector, and the other (peripheral filament elements, 132-134) is disposed around the periphery. . When each filament element is viewed from its axial direction, the outline is oval. Further, assuming that Lc is the length in the longitudinal direction of the central filament element and Ls is the length in the longitudinal direction of the peripheral filament element, if 0.2 ≦ Ls / Lc ≦ 0.9, then the central illuminance and light distribution Improved characteristics. Furthermore, when the maximum inner diameter of the bubble is R and the maximum outer diameter of the filament body is r, the life is improved when 0.25 ≦ r / R ≦ 0.75.

Description

  The present invention relates to a tube, a tube with a reflector, and an illumination device, and more particularly to a filament wiring structure.

A tube with a reflector, such as a halogen bulb with a reflector, has a configuration in which a halogen bulb is incorporated in a concave reflector, for example, for studio lighting, or for general lighting such as a spotlight in a commercial facility. in use.
There is a demand for further improvement in light collection efficiency for the halogen bulb. Here, “light collection efficiency” indicates illuminance [lx / W] per electric power.

  The halogen light bulb includes a bulb and a filament body provided in the bulb. It is known that the filament body can be made closer to a point light source as it is made compact, and the light collection efficiency can be improved in combination with a reflecting mirror. However, in general, when the rated voltage [V], the rated power [W], and the rated life time (for example, 3000 hours) are determined, the strand length and strand diameter of the tungsten wire constituting the filament body Therefore, the filament body cannot be made compact by simply shortening the wire length, for example.

  When the rated voltage and the rated power are determined, the resistance value R of the filament body is determined. For example, when the wire length is shortened, it is necessary to reduce the wire diameter in order to maintain the resistance value R. However, if the wire diameter is reduced, the tungsten wire becomes thinner due to evaporation of tungsten during lighting and the wire tends to be broken, and the life time tends to be shortened. On the other hand, when the wire diameter is increased in order to ensure the lifetime, it is necessary to increase the wire length in order to maintain the resistance value R. However, if the wire length becomes too long, it is necessary to keep the dimensions of the filament body within a certain range according to the size of the bulb, etc., so the filament in a state where the pitch is reduced or provided in the bulb The tension applied to the body must be reduced, and the mechanical strength of the filament body may be weakened and may be broken. Therefore, in order to satisfy the predetermined rated voltage, rated power, and rated life time, the wire length and the wire diameter are substantially uniquely determined, and it is difficult to make the filament body compact. .

  In addition, a commercially available halogen light bulb with a reflector used for general illumination such as a spotlight has a beam angle of 10 degrees and the mirror diameter φ of the reflector is 50 [mm]. Under the constraint that the power is 65 [W] (rated voltage 110 [V]), the central illuminance has reached 6500 [lx] (6500 [cd] in terms of central luminosity). Improvement is desired.

The “central illuminance” here refers to the illuminance of the area where the optical axis of the reflecting mirror and the irradiation surface intersect on the irradiation surface.
Furthermore, it is desired to extend the life of the tube.
In order to improve the light collection efficiency and the central illuminance under the above restrictions, the following inventions have been made.

  That is, in a halogen lamp with a reflector used for studio lighting, a plurality of filament elements wound linearly and spirally are provided in order to increase the light collection efficiency and increase the central illuminance. There is known one using a filament body in which filament elements are arranged in parallel to the optical axis of a reflecting mirror and arranged almost symmetrically around the optical axis so as to form a regular triangle or square (for example, Patent Document 1).

  In particular, in a halogen bulb with a reflector using a halogen bulb in which an infrared reflecting film is formed on the outer surface of the glass bulb in order to improve luminous efficiency, the infrared ray radiated from the filament element and reflected by this infrared reflecting film In order to efficiently return the filament element to the filament element, a filament element wound linearly and spirally on the optical axis with respect to the filament body used in the conventional halogen lamp with a reflector is also provided. A filament arranged on the optical axis (hereinafter referred to as “central filament element”) and at least three other filaments arranged substantially symmetrically around the filament (hereinafter referred to as “peripheral filament element”) The thing using the filament body which consists of is proposed (for example, refer patent document 2).

Note that “luminous efficiency” here refers to the luminous flux [lm / W] per electric power.
Furthermore, generally in a halogen bulb with a rated voltage of 100 [V] or more, a double-wound coil is often used as a filament body as another means for making the filament body compact and approaching a point light source. In order to achieve compactness, a device using a triple coil as a filament body has been proposed (see, for example, Patent Document 3).
Japanese National Patent Publication No. 6-510881 JP 2002-63869 A JP 2001-345077 A

  However, it is considered that it is very difficult to apply the conventional technique to a halogen light bulb with a reflector for general illumination such as a spotlight and to realize a particularly narrow beam angle type. In a conventional halogen light bulb with a reflector for general illumination having a rated power of 65 [W] and a beam angle of 10 degrees, the one using the filament body described in Patent Document 1 and described in Patent Document 2 When the light distribution curve with the one using the filament body was examined, the result was as shown in FIG. In FIG. 34, the characteristic of the conventional halogen lamp with a reflector for general illumination that uses the filament body described in Patent Document 1 is indicated by a broken line (i). The characteristic of the light bulb using the filament body described in Patent Document 2 is indicated by a solid line (ii). As is apparent from FIG. 34, in the former case, the filament element arranged around the optical axis increases the illuminance in the peripheral area of the portion corresponding to the optical axis on the irradiation surface, while the central illuminance (angle 0 degree). In the latter case, the peripheral filament element increases the illuminance not only in the area corresponding to the optical axis but also in the peripheral area. As a whole, the beam angle was 13 degrees or more.

  Among the halogen lamps with reflectors for general illumination currently on the market, the mainstream beam angle is 10 degrees although it is called the narrow-angle type. According to IEC standard 60357, the allowable range of error of the beam angle (10 degrees) is ± 25%, that is, when the standard of the beam angle is 10 degrees, the allowable range of error is from 7.5 degrees. It will be up to 12.5 degrees. Therefore, even when the conventional filament body as described above is applied to a halogen lamp with a reflector used for general illumination such as a spotlight, the above-described error tolerance is exceeded and a desired beam angle (for example, 10 Degree).

  Such a problem is not particularly noticeable when it is used for studio lighting. This is considered to be mainly due to the difference in the mirror diameter φ of the reflecting mirror. That is, the mirror diameter φ of the reflector used in the halogen bulb with a reflector for general illumination is mainly 35 [mm] to 100 [mm], whereas the halogen bulb with a reflector for studio illumination. The mirror diameter [phi] of the reflector used in is mainly 200 [mm] to 400 [mm]. The region contributing to the central illuminance in the reflecting mirror (hereinafter simply referred to as “central illuminance contributing region”) is in the vicinity thereof including the focal point of the reflecting mirror. The central illuminance contribution region is smaller as the mirror diameter φ of the reflecting mirror is smaller and larger as the mirror diameter φ is larger. Therefore, the halogen light bulb with a reflector for studio lighting has a large central illuminance contribution region, and as a result, the light emitted from the light emitting unit arranged around the optical axis also greatly contributes to the central illuminance. It is believed that there is.

  Further, when this kind of halogen lamp with a reflector is used for studio lighting, its rated life is mainly 200 hours to 500 hours, and in some cases 2000 hours, and is used for general lighting such as spotlights. In some cases, the rated life is required to be 2000 hours to 3000 hours, sometimes exceeding 3000 hours. However, the above-described conventional halogen bulb with a reflector is commercially available for studio lighting that does not require a long life. Therefore, sufficient consideration has not been made with respect to the lifetime, and there is still room for improvement with respect to the lifetime, particularly when used for general lighting such as spotlights.

  Furthermore, if the coil to be used as a filament body provided in a halogen bulb with a reflector is doubled or tripled, vibration resistance tends to decrease. Especially when a triple-wound coil is provided in the bulb as a filament body. In order to improve vibration resistance, it is necessary to electrically and mechanically connect the triple-wound coil to the internal lead wire or the like in a state where the coil is pulled in the longitudinal direction, that is, in a state where tension is applied. However, in such a case, the pitch of the tertiary coil in the triple-winding coil becomes large, and the entire triple-winding coil becomes longer in the longitudinal direction, which prevents the compactness of the filament body, resulting in a problem that the light collection efficiency cannot be improved. Therefore, a means to replace the triple winding coil is required.

  The present invention has been made in view of such circumstances. The first object is to improve the light collection efficiency, the second object is to increase the central illuminance, and the third object is to narrow the beam angle. Provided are a tube, a tube with a reflecting mirror, and an illumination device that can achieve good light distribution characteristics with a square type and can achieve a long life as a fourth object.

In order to solve the problem of improving the light collection efficiency, the tube according to the present invention is incorporated in the concave reflecting mirror of the lighting device, and the rated voltage is set to 100 [V] or more and 250 [V] or less. A tube having a bulb and a filament body provided in the bulb, wherein the filament body has a plurality of filament elements and the bulb is incorporated in the reflector The plurality of filament elements are coils each wound in a single layer, one on the optical axis of the reflector, and the central filament element of the central filament element. One or more of the remaining coils are arranged on an axis parallel to the axis,
Each of the filament elements has a configuration in which the contour when viewed from the winding axis direction is different from a substantially circular shape.

  Moreover, in the tube with a reflector according to the present invention, a concave reflector and a tube arranged in the reflector and having a rated voltage set to 100 [V] or more and 250 [V] or less. The tube has a bulb and a filament body provided in the bulb, the filament body is arranged to contain the focal point of the reflector, and has a plurality of filament elements, Each of the plurality of filament elements is a single wound coil, one is arranged on the optical axis of the reflecting mirror, and one or more of the remaining coils are arranged on an axis parallel to the optical axis. Each filament element has a configuration in which the contour when viewed from the winding axis direction is different from a substantially circular shape.

In order to solve the above problems of improvement in central illuminance and light distribution characteristics, a tube with a reflector according to the present invention is provided with a concave reflector, a bulb, and a bulb and the bulb. A tube having a filament body, the filament body having a linear central filament element whose longitudinal center axis is substantially located on the optical axis of the reflector, and the center Around the filament element, there is at least three peripheral filament elements arranged such that the longitudinal central axis is substantially parallel to the longitudinal central axis of the central filament element, the peripheral filament element being When the intersection points where the central axis in the longitudinal direction of each of the peripheral filament elements intersects the plane perpendicular to the central axis in the longitudinal direction of the central filament element are The intersection of the longitudinal central axis and the plane of the central filament element centroids are arranged to form a substantially regular polygon to (centroid), and the length L _C of the longitudinal direction of the central filament element The length L _S in the longitudinal direction of the peripheral filament element is adjusted so that L _S / L _C is 0.2 or more and 0.9 or less.

Moreover, in the tube according to the present invention, the tube is incorporated in the reflecting mirror portion of the lighting device, and the tube includes a bulb and a filament body provided in the bulb, and the filament body Is a linear central filament element whose longitudinal center axis is substantially located on the optical axis of the reflecting mirror portion when the tube is incorporated in the reflecting mirror portion, and around the central filament element, At least three peripheral filament elements arranged such that a longitudinal central axis is substantially parallel to a longitudinal central axis of the central filament element, wherein the peripheral filament elements are each of the peripheral filaments When the intersection of the central axis in the longitudinal direction of the element and the plane perpendicular to the central axis in the longitudinal direction of the central filament element is connected, the central filament element is required. Longitudinal central axis and the center of gravity of the point of intersection between the plane (centroid) and are arranged to form a substantially regular polygon, the longitudinal length L _C of the central filament element, the periphery of the The length L _S in the longitudinal direction of the filament element is adjusted so that L _S / L _C is 0.2 or more and 0.9 or less.

  In order to solve the problem of the lifetime, the tube according to the present invention includes a bulb and a filament body that is disposed inside the bulb and has at least three linear filament elements, and the filament element includes: The central axis in the longitudinal direction is substantially parallel to the central axis in the longitudinal direction of the bulb, and is forested so as to surround the central axis in the longitudinal direction of the bulb. An abbreviation having a center of gravity (centroid) as the intersection of the central axis in the longitudinal direction of the valve and the plane when the intersection of the central axis and the plane perpendicular to the central axis in the longitudinal direction of the bulb is connected. It is arranged so as to form a regular polygon, and the maximum inner diameter R of the portion of the bulb where the filament body is located and the maximum outer diameter r of the filament body are r R has a structure which is adjusted to be 0.25 to 0.75.

  Moreover, in the tube according to the present invention, the tube is incorporated in a reflecting mirror portion of the lighting device, and the tube includes a bulb and a filament body arranged inside the bulb, and the filament The body has a linear central filament element whose longitudinal center axis is substantially located on the optical axis of the reflecting mirror portion when the tube is incorporated in the reflecting mirror portion, and around the central filament element. , At least three peripheral filament elements arranged such that a longitudinal central axis is substantially parallel to a longitudinal central axis of the central filament element, wherein the peripheral filament element is When the intersection of the longitudinal center axis of the filament element and the plane perpendicular to the longitudinal center axis of the central filament element is connected, the central filament Arranged so as to form a substantially regular polygon whose center of gravity (centroid) is the intersection of the central axis in the longitudinal direction of the element and the plane, and the portion of the bulb where the filament body is located The maximum inner diameter R and the maximum outer diameter r of the filament body are adjusted so that r / R is 0.25 or more and 0.75 or less.

  Furthermore, in the tube with a reflector according to the present invention, a tube having a concave reflector, a bulb disposed in the reflector and having a bulb and a filament body provided in the bulb. The filament body has a linear central filament element whose longitudinal center axis is substantially located on the optical axis of the reflecting mirror, and a longitudinal central axis around the central filament element. At least three peripheral filament elements arranged so as to be substantially parallel to the longitudinal central axis of the filament element, the peripheral filament element having a longitudinal central axis of each of the peripheral filament elements; When the intersections where the plane perpendicular to the central axis in the longitudinal direction of the central filament element intersects are respectively connected, the central axis in the longitudinal direction of the central filament element and the plane Are arranged so as to form a substantially regular polygon whose center of gravity (centroid) is the intersection of the filament and the maximum inner diameter R of the portion of the bulb where the filament body is located, and the maximum of the filament body The outer diameter r is adjusted so that r / R is 0.25 or more and 0.75 or less.

  As described above, the tube according to the present invention is a tube having a rated voltage of 100 [V] or more and 250 [V] or less that is incorporated in the reflecting mirror of the illumination device, and the tube includes the valve and the valve. The filament body is arranged so as to contain the focal point of the reflector in a state where the tube is incorporated in the reflector, and a plurality of filaments Since each of the plurality of filament elements has a single-wound coil, vibration resistance can be improved as compared with a multi-winding coil.

  Further, in the tube, since each of the plurality of filament elements constituting the filament body is a single wound coil, the pitch of the coil can be made smaller than that of the multiple wound coil, One filament element is arranged on the optical axis of the reflecting mirror, and one or more of the remaining coils are arranged on an axis parallel to the optical axis, so that the filament element is arranged on the optical axis of the reflecting mirror. Compared with the case where no is arranged, the central illuminance and the light collection efficiency can be improved.

  Further, in the tube, each of the filament elements is formed so that the outline when viewed from the winding axis direction is different from a substantially circular shape, so that the outline of the filament element when viewed from the winding axis direction is The length of the filament body in the optical axis direction can be shortened as compared with a case of a substantially circular shape, that is, a perfect circle or a circle close to a true circle distorted by high or low processing accuracy. Therefore, the tube can increase the ratio of the filament body existing in the central illumination contribution area in the reflecting mirror as compared with the conventional tube, thereby increasing the center illumination and improving the light collection efficiency. Can do.

It is preferable that the contour is flat because the manufacturing is easy.
If the outline is a rectangle, a substantially track shape or an oval, it will be easier to manufacture, and it is preferable that the outline or the oval is produced using a core wire that has been conventionally used for producing filament elements. This is preferable because it is easier to manufacture.

  If the number of the plurality of filament elements is three, the number of the peripheral filament elements can be reduced, and the light emitted from the central filament element can be prevented from being blocked by the peripheral filament elements. The central illuminance can be increased and the light collection efficiency can be improved. Further, since the number of filament elements in the filament body is reduced, the gap between the filament elements can be widened, and the impact resistance, vibration resistance and Lifespan can be improved.

If the three filament elements are provided in the bulb so that their winding axes are arranged on the same plane, it is possible to achieve a uniform light distribution on the irradiation surface.
If the reflecting surface of the reflecting mirror is a spheroid outer peripheral surface or a parabolic surface, and the aperture inner diameter is 30 [mm] or more and 100 [mm] or less, the beam angle is 7.5 degrees or more and 12 degrees. Less than 5 degrees, so-called narrow angle can be easily adjusted, which is preferable.

The above effect can be obtained even if the tube has a concave reflecting mirror.
Even if the above-mentioned tube is incorporated in a lighting fixture provided with a reflecting mirror, the above-mentioned effect can be obtained in the same manner.
As described above, in the tube with a reflector according to the present invention, a tube having a concave reflector, a bulb disposed in the reflector, and a filament body provided in the bulb. The filament body includes a linear central filament element whose longitudinal central axis is substantially located on the optical axis of the reflector, and a longitudinal central axis around the central filament element. Having at least three peripheral filament elements arranged so as to be substantially parallel to the longitudinal central axis of the central filament element, the peripheral filament element being in the longitudinal direction of each peripheral filament element On the central axis in the longitudinal direction of the central filament element when connecting the intersections where the central axis and a plane perpendicular to the longitudinal central axis of the central filament element intersect Are arranged to form a substantially regular polygon to the center of gravity (centroid) of the point, the coil length L _{C [mm]} of the center filament element, coil length L _S of the peripheral filaments element _[mm] and When the ratio of Ls / Lc is Ls / Lc, the coil length Lc of the central filament element and the coil length Ls of the peripheral filament element are determined so that L _S / L _C is 0.2 or more and 0.9 or less. Therefore, the coil length Ls of the peripheral filament element can be made relatively shorter than the coil length Lc of the central filament element, or the coil length Lc of the central filament element can be made shorter than the coil length of the peripheral filament element. Since it can be made relatively longer than Ls, the central illuminance can be improved and the central illuminance can be maximized as compared with a conventional tube with a reflector. Together, it is possible to narrow the beam angle. Therefore, the tube with the reflector can increase the central illuminance as compared with the conventional tube with the reflector, and can realize a good light distribution characteristic particularly with a narrow-angle beam angle. it can.

If the distance D ₁ of the between the central filament element and each of the peripheral filaments element is set to 0.1 [mm] or more 2.2 [mm] or less, of the filament assemblies in the central illuminance contribution region Since the density can be increased and arc discharge can be prevented from occurring between the central filament element and each peripheral filament element constituting the filament body, the central illuminance compared to a conventional tube with a reflector Can be improved, and disconnection of each filament element can be suppressed.

The above effect is not limited to the case where the reflecting mirror is provided on the tube, but can be obtained similarly when the tube is provided on the side of the lighting device to be mounted. However, it is a premise that the optical axis of the reflecting mirror provided in the illumination device and the central axis in the longitudinal direction of the tube are substantially coincident.
The above-mentioned effect is not limited to a tube with a reflector. Even if a tube without a reflector is abolished from the tube with a reflector and incorporated into an illumination device having a reflector, Obtained in the same way. However, it is premised on that the optical axis of the reflecting mirror portion and the central axis in the longitudinal direction of the tube without the reflecting mirror substantially coincide.

When the tube with a reflector is attached to a lighting device, the above effect can be obtained.
As described above, the tube according to the present invention includes a bulb and a filament body that is disposed inside the bulb and has at least three linear filament elements, and the filament element has a longitudinal center. The shaft is substantially parallel to the central axis in the longitudinal direction of the bulb and is forested so as to surround the central axis in the longitudinal direction of the bulb, and the longitudinal central axis of each filament element and the bulb When a cross point intersecting with a plane perpendicular to the central axis in the longitudinal direction is connected, a substantially regular polygon having a center of gravity (centroid) at a point on the central axis in the longitudinal direction of the bulb is formed. The ratio of the maximum inner diameter R [mm] of the portion of the bulb where the filament body is located to the maximum outer diameter r [mm] of the filament body is r / R. Since the maximum outer diameter r and the maximum inner diameter R are determined so that r / R is not less than 0.25 and not more than 0.75, when the tube is turned on compared to the conventional tube The convection layer generated between the bulb and the filament body can be made thin, the amount of evaporation of the filament body constituent material can be suppressed, and the temperature rise of the bulb and the filament body can be suppressed. It is possible to prevent the body from being disconnected, to suppress blackening of the valve inner surface caused by the evaporated filament body constituent material adhering to the valve, and to prevent damage to the valve. Therefore, the life of the tube can be extended as compared with the conventional tube.

The above effect can be similarly obtained when a reflecting mirror is provided on the tube, and the central axis in the longitudinal direction of the bulb of the tube and the optical axis of the reflecting mirror are positioned on substantially the same axis.
Further, it is a tube that is incorporated in the reflecting mirror part of the illumination device, the tube having a bulb and a filament body disposed inside the bulb, and the filament body is formed by the tube bulb having the above-described configuration. When incorporated in the reflector portion, the central axis in the longitudinal direction is positioned substantially on the optical axis of the reflector portion, and the central axis in the longitudinal direction is around the central filament element. At least three peripheral filament elements arranged so as to be substantially parallel to the longitudinal central axis of the central filament element, wherein the peripheral filament element is a longitudinal central axis of each of the peripheral filament elements And the central axis in the longitudinal direction of the central filament element when connecting the intersections where the plane perpendicular to the central axis in the longitudinal direction of the central filament element intersects each other Are arranged so as to form a substantially regular polygon with the center of gravity (centroid) as the center of gravity, and the maximum inner diameter of the portion of the bulb where the filament body is located is R [mm], and the filament body When the maximum outer diameter is r [mm], the above effect can be obtained in the same manner even when the configuration satisfies the relational expression of 0.25 ≦ r / R ≦ 0.75.

  And a tube having a concave reflecting mirror and a bulb disposed in the reflecting mirror and having a bulb and a filament body provided in the bulb, the filament body having a longitudinal center. A linear central filament element whose axis is substantially located on the optical axis of the reflector, and a central axis in the longitudinal direction is substantially parallel to the central axis in the longitudinal direction of the central filament element around the central filament element. At least three peripheral filament elements arranged such that the peripheral filament elements are in a longitudinal central axis of each of the peripheral filament elements and a longitudinal central axis of the central filament element. When connecting intersections that intersect with a perpendicular plane, a substantially regular polygon is formed with the center of gravity (centroid) at the point on the central axis in the longitudinal direction of the central filament element. When the maximum inner diameter of the portion of the bulb where the filament body is located is R [mm] and the maximum outer diameter of the filament body is r [mm], 0.25 The above effect can be obtained in the same manner even when the relational expression ≦ r / R ≦ 0.75 is satisfied.

When the ratio between the coil length L _C [mm] of the central filament element and the coil length L _S [mm] of the peripheral filament element is Ls / Lc, L _S / L _C is 0.2 or more and 0.9. When Lc and Ls are determined to be as follows, the coil length Ls of the peripheral filament element can be made relatively shorter than the coil length Lc of the central filament element, or the coil of the central filament element Since the length Lc can be made relatively longer than the coil length Ls of the peripheral filament element, the central illuminance is improved and the central illuminance is set to the maximum illuminance as compared with a conventional tube with a reflector. Can reduce the beam angle, increase the central illuminance, and achieve good light distribution characteristics, especially with the narrow-angle beam angle type. be able to.

If the distance D ₁ of the between the central filament element and each of the peripheral filaments element is set to 0.1 [mm] or more 2.2 [mm] or less, of the filament assemblies in the central illuminance contribution region The density can be increased, and since arc discharge can be suppressed between the central filament element and the peripheral filament elements constituting the filament body, the central illuminance can be improved and each filament can be improved. It is preferable because the element can be prevented from being disconnected and contribute to a long life.

An effect similar to the above effect can be obtained also in the illumination device provided with any of the above-mentioned tube bulbs.
Any of the above effects can be obtained in the same manner even if any of the above-mentioned reflector-equipped tubes is incorporated in a lighting device.

In Embodiment 1, it is the schematic block diagram which notched one part of the illuminating device with which a halogen light bulb was integrated in the lighting fixture provided with the reflective mirror. In Embodiment 1, it is the schematic block diagram which notched some halogen light bulbs which are due to be integrated in an illuminating device. FIG. 3 is a schematic perspective view showing a lead wire and a support wire that support a filament body provided in the halogen light bulb in the first embodiment. FIG. 3 is a schematic perspective view showing a filament body provided in a bulb of a halogen light bulb, a lead wire supporting the filament body, and a support wire in the first embodiment. FIG. 3 is a schematic cross-sectional view of the filament body provided in the halogen light bulb according to Embodiment 1 cut in a direction perpendicular to the bulb axis direction. FIG. 6 is a schematic perspective view showing a lead wire and a support wire that support a filament body provided in the halogen light bulb in the second embodiment. It is the schematic perspective view which showed the filament body provided in the bulb | bulb of the halogen bulb in Embodiment 2, and the lead wire and support wire which support it. FIG. 6 is a schematic cross-sectional view of a filament body provided in the halogen light bulb according to Embodiment 2 cut in a direction perpendicular to the bulb axis direction. It is the characteristic view which showed the relationship between the center illumination intensity in the filament body of Embodiment 1 and Embodiment 2, and the distance between filament element (coil) winding axes from the result of a simulation test. It is the characteristic view which showed the relationship between the center illumination intensity and the distance between filament element (coil) winding axis | shafts from the result of a simulation test in the filament body which has three filament elements of Embodiment 2. FIG. It is the characteristic view which showed the relationship between the clearance gap between filament elements and center illumination intensity in the filament body which has three filament elements of Embodiment 2 from the result of the measurement test. FIG. 10 is a characteristic diagram showing the relationship between the gap between the filament elements and the beam angle in the filament body having the three filament elements according to the second embodiment from the results of the actual measurement test. It is the schematic block diagram which showed typically the coil arrangement | positioning in the plane perpendicular | vertical to a coil axis | shaft about each sample used for the center illumination intensity and light distribution characteristic evaluation test of Embodiment 2. FIG. 6 is a schematic cross-sectional view of a halogen lamp with a reflector in a third embodiment. FIG. FIG. 10 is a schematic configuration diagram in which a part of a halogen light bulb with a reflector in Embodiment 5 is cut away. It is the schematic sectional drawing which cut | disconnected the filament body with which the halogen light bulb with a reflector in Embodiment 5 was equipped in the optical axis direction. It is the schematic sectional drawing which cut | disconnected the filament body with which the halogen light bulb with a reflector in Embodiment 5 was equipped in the direction perpendicular | vertical to an optical axis direction. FIG. 10 is a characteristic diagram showing the relationship between the ratio of the axial length of the central filament element and the axial length of the peripheral filament element and the beam angle in the halogen bulb with a reflector according to the fifth embodiment. FIG. 10 is a characteristic diagram showing a light distribution curve when the ratio of the axial length of the central filament element to the axial length of the peripheral filament element is 0.9 in the halogen light bulb with a reflector according to the fifth embodiment. FIG. 10 is a characteristic diagram showing a light distribution curve when the ratio of the axial length of the central filament element to the axial length of the peripheral filament element is 0.6 in the halogen light bulb with a reflector according to the fifth embodiment. FIG. 20 is a schematic configuration diagram in which a part of a halogen light bulb in Embodiment 8 is cut away. FIG. 10 is a schematic cross-sectional view of a filament body provided in a halogen light bulb in Embodiment 8 cut in the bulb axis direction. FIG. 10 is a schematic cross-sectional view of a filament body provided in a halogen light bulb in Embodiment 8 cut in a direction perpendicular to the bulb axis direction. FIG. 20 is a schematic cross-sectional view of another variation of the filament body provided in the halogen light bulb in the eighth embodiment, cut in a direction perpendicular to the bulb axis direction. In Embodiment 9, it is the schematic block diagram which notched one part of the illuminating device with which a halogen bulb was integrated in the lighting fixture provided with the reflective mirror. It is the schematic sectional drawing which cut | disconnected the filament body with which the halogen bulb in Embodiment 9 and Embodiment 12 was equipped in the optical axis direction. It is the schematic sectional drawing which cut | disconnected the filament body with which the halogen bulb in Embodiment 9 and Embodiment 12 was equipped in the direction perpendicular | vertical to an optical axis direction. FIG. 23 is a schematic cross-sectional view in which another variation of the filament body provided in the halogen light bulb in the ninth embodiment is cut in a direction perpendicular to the optical axis direction. FIG. 11 is a schematic configuration diagram in which a part of a halogen light bulb with a reflector in Embodiment 10 is cut away. FIG. 16 is a schematic configuration diagram in which a part of a halogen light bulb with a reflector in Embodiment 11 is cut away. In the halogen bulb with a reflector according to the eleventh embodiment, it is a characteristic diagram showing the relationship between the ratio of the axial length of the central filament element to that of the peripheral filament element and the beam angle. In the halogen bulb with a reflector according to the eleventh embodiment, a characteristic diagram showing a light distribution curve when a ratio of an axial length of a central filament element and an axial length of a peripheral filament element is 0.9. . FIG. 24 is a characteristic diagram showing a light distribution curve when the ratio of the axial length of the central filament element to the axial length of the peripheral filament element is 0.6 in the halogen bulb with a reflector according to the eleventh embodiment. . It is the characteristic view which showed the light distribution curve in the conventional halogen bulb with a reflecting mirror.

Explanation of symbols

1,79,88 Halogen bulb with reflector 2,80,89,112,138 Reflector 3,31,53,90,114,139 Halogen bulb 4,34,81,91,116,140 Base 4a, 4b, 35a, 35b, 92a, 92b, 117a, 117b, 141a, 141b Terminal portion 5, 57, 59, 82, 93, 111, 143 Opening portion 6, 83, 94, 144 Neck portion 7, 61, 84, 95, 119 , 145 Reflective surface 8, 60, 85, 96, 118, 146 Front glass 9, 33, 87, 97, 121, 147 Adhesive 10, 36, 62, 98, 122, 149 Chip-off part 11, 37, 63, 99,123,150 Light-emitting part 12,40,66,100,120,148 Sealing part 13,32,56,101,115,142 Bulb 14 , 42, 52, 68, 78, 102 Filament body 15, 43, 69, 103 Internal lead wire 16, 44, 104, 129 Metal foil 17, 45, 105, 128 Internal lead wire 18 Assembly 19, 70, 74, 106 Central filament element 20, 21, 22, 71, 72, 73, 75, 76, 77, 107, 108, 109 Peripheral filament element 38, 64, 124 Reduced diameter portion 39, 65, 125 Tube portion 41, 67, 126 Visible light transmitting infrared reflecting film 46, 47, 48, 49, 50, 51 Filament element 54, 110, 137 Illuminating device 55 Reflecting mirror part 58, 113 Lighting fixture 86 Fastener 127, 135, 136 Filament body 130 External lead wire 131 , 132, 133, 134 Coils (filament elements)
228 Support line 328 Stem glass

(Embodiment 1)
The best mode for carrying out the present invention will be described below with reference to the drawings.
FIG. 1 is a schematic configuration diagram in which a part of a lighting device in which a halogen light bulb is incorporated in a lighting fixture including a reflecting mirror in the first embodiment is cut away.
As shown in FIG. 1, the illumination device 110 according to the first embodiment of the present invention is mainly used for general illumination such as a spotlight as an example, and light is emitted from an opening 111 and is internally provided. A cylindrical lighting fixture 113 in which the reflecting mirror 112 is housed, and a halogen bulb 114 with a rated power of 65 [W] (rated voltage 110 [V]) incorporated in the reflecting mirror 112 are provided.

The rated voltage of the halogen bulb 114 is not limited to the above voltage, and may be set within a range of 100 [V] to 250 [V].
The central axis X ₆ in the longitudinal direction of the valve 115 of the halogen lamp 114 to the optical axis Y ₆ of the reflector 112 are substantially positioned on the same axis.
A receiving tool (not shown) to which a base 116 (see FIG. 2) of the halogen light bulb 114 is attached is provided at the bottom of the lighting fixture 113.

A front glass 118 is attached to the reflecting mirror 112, and a reflecting surface 119 of a rotating body made of a spheroid outer peripheral surface or a rotating paraboloid surface is formed on the inner surface. In addition to a metal film such as aluminum or chromium, a multilayer interference film made of silicon dioxide (SiO ₂ ), titanium dioxide (TiO ₂ ), magnesium fluoride (MgF), zinc sulfide (ZnS) or the like is formed on the reflecting surface 119. Is formed. Moreover, you may form a facet in this reflective surface as needed.

In the lighting device 110, the reflector 112 can be attached to and detached from the lighting fixture 113 in order to replace the halogen light bulb 114. In addition, the reflecting mirror 112 itself is fixed to the lighting fixture 113, and the front glass 118 is the reflecting mirror. 112 may be detachable.
Moreover, the lighting fixture 113 itself is not limited to a cylindrical shape, and various known shapes can be used.

Since the lighting fixture 113 itself including the reflecting mirror 112 is publicly known, other details will be omitted, and the details of the halogen bulb 114 which is the main characteristic part of the present invention will be described. Therefore, as lighting fixtures, various known types of lighting fixtures (including those for studios) other than the lighting fixture 113 shown in FIG. 1 can be used.
FIG. 2 is a schematic configuration diagram in which a part of a halogen bulb scheduled to be incorporated in the lighting device is cut out in the first embodiment.

As shown in FIG. 2, the halogen light bulb 114 includes a bulb 115 made of quartz glass, hard glass, or the like, and an E-shaped base 116 fixed to the sealing portion 120 side of the bulb 115 with an adhesive 121, for example. ing.
The bulb 115 is formed by a chip-off portion 122 which is a residual mark of sealing cut, a light-emitting portion 123 having a substantially spheroidal shape, a reduced diameter portion 124, a substantially cylindrical tube portion 125, and a known pinch seal method. The sealing portions 120 are formed so as to be successively connected. Of the outer surface of the bulb 115, a visible light transmitting infrared reflecting film 126 is formed on the outer surfaces of the tip-off part 122, the light emitting part 123 and the reduced diameter part 124.

The "substantially spheroid shape" as used herein includes not only the complete spheroid shape but also the case where it deviates from the complete spheroid shape due to variations in glass processing. I mean.
The shape of the bulb 115 is not limited to the tip-off portion 122, the substantially spheroidal light-emitting portion 123, the reduced-diameter portion 124, the cylindrical portion 125, and the sealing portion 120, which are successively formed. Off part (may be absent in some cases), light bulb with substantially spheroidal shape, reduced diameter part and sealed part formed in sequence, chip off part (may not be in some cases) A bulb formed by sequentially connecting a light-emitting part and a sealing part having a substantially spheroidal shape, or a chip-off part (may be omitted in some cases), a light-emitting part and a sealing part having a substantially cylindrical shape being successively connected. Various known valve shapes such as formed valves can be used. Of course, instead of the above-described substantially spheroidal shape, the light emitting portion may have a substantially spherical shape or a substantially composite ellipsoidal shape.

A filament body 127 is provided in the light emitting portion 123, and a predetermined amount of a halogen substance and a rare gas, or a halogen substance, a rare gas, and a nitrogen gas are sealed therein.
One end of an internal lead wire 128 made of tungsten, for example, is electrically and mechanically connected to the filament body 127, respectively. The other end portion of the internal lead wire 128 is connected to one end portion of the external lead wire 130 via a molybdenum metal foil 129 sealed in the sealing portion 120. The other end of the external lead wire 130 is led out of the bulb 115 and is electrically connected to the terminal portions 117a and 117b of the base 116, respectively. In addition, a support wire 228 for realizing the arrangement described below of the filament elements constituting the filament body 127 has one end supported by the stem glass 328 and extended.

FIG. 3 is a schematic perspective view showing a lead wire and a support wire that support the filament body provided in the halogen light bulb in the first embodiment and energize the filament body, and FIG. 4 shows the halogen light bulb in the first embodiment. FIG. 5 is a schematic perspective view showing a filament body provided in the bulb of FIG. 1, a lead wire that supports and energizes the filament body, and a support wire, and FIG. 5 shows the filament body provided in the halogen bulb in Embodiment 1. it is a schematic cross-sectional view taken along the valve axis X ₆ direction perpendicular to the direction.

As shown in FIGS. 3 to 5, the filament body 127 includes a plurality of, for example, four filament elements (coils) 131, 132, 133, and 134. These four filament elements (coils) 131, 132, 133, and 134 are electrically connected in series. Further, the filament body 127 is at a position where the position with respect to the reflecting mirror 112 includes the focal point F ₆ of the reflecting mirror 112. That is, the filament 127, four filament elements (coils) 131, 132, 133 a pillar body likened integrally with when a (portion indicated by a broken line in FIG. 5), the focal point _{F 6} its pillars Located in or on the body. Thus, when viewed in the actual filament assembly 127, the focal point _{F 6} filament element (coil) 131, 132, 133 and 134 of the inner or on the surface or each coil (131, 132), (131, 133), It is located between (131,134), (132,133), (132,134), (133,134). In the present embodiment, the center point of the filament body 127 is substantially located on the focal point F _{6 of the} reflecting mirror 112. However, as shown in FIG. 5, the point F ₀ on the surface of the filament body may be located on the focal point F ₆ .

In FIG. 1, filament elements (coils) 131, 132, 133, and 134 are integrated, and the filament body 127 is schematically shown as one column body. FIG. 5 schematically shows only the outlines of the filament elements (coils) 131, 132, 133, and 134.
Each filament element (coil) 131, 132, 133, 134 is a single-wound coil that is made of tungsten and extends straight in a substantially straight line, and has a substantially circular outline when viewed from the longitudinal direction thereof. Shape, preferably a flat shape, for example, a rectangular shape, or a substantially track shape (oval shape) composed of two semicircular portions facing each other so that the curved portion faces outward and two parallel straight portions connecting them. Shape).

When the filament elements (coils) 131, 132, 133, and 134 are formed so that the contour when viewed from the longitudinal direction has a substantially track shape (oval shape), the coil length in the longitudinal direction of the conventional coil is obtained. In comparison, the coil length Ls ₄ (see FIG. 4) in the longitudinal direction of each filament element (coil) 131, 132, 133, 134 is shortened.
However, the “substantially circular shape” mentioned here includes a perfect circle, as well as a circle close to a perfect circle whose shape is slightly different from the perfect circle due to manufacturing variations, processing accuracy, etc. Is also included. That is, “a shape different from a substantially circular shape” means a shape that is different from a perfect circle or a circle close to the true circle. In addition, “straightly straightened” means that the coil after being wound around the core wire is not actively bent, and has been bent due to manufacturing variations in manufacturing, accuracy of processing, etc. Including cases. However, the single-winding coil extending straightly in a straight line referred to here includes, of course, a single-winding coil wound straight in a straight line, for example, the single-winding coil in the longitudinal direction of the coil. And the like that are twisted with the central axis as the rotation axis.

  Further, in these filament elements (coils) 131, 132, 133, and 134, the contour when viewed from the longitudinal direction is different from the substantially circular shape, in addition to the substantially track shape described above, a substantially elliptical shape and a substantially flat shape. An elliptical shape, a substantially polygonal shape, or the like may be used, and it is not particularly limited to its outline (except for a substantially circular shape). These contours can be realized by appropriately changing the number of core wires around which the strands are wound, the shape of the core wires, the arrangement of the core wires, and the like in the filament element (coil) manufacturing process.

Further, when the filament elements (coils) 131, 132, 133, and 134 are formed so that the contour when viewed from the longitudinal direction has a substantially track shape (oval shape), these filament elements (coils) 131, 132, 133, and 134 are tungsten wires having a wire diameter (element wire diameter) of 0.015 [mm] to 0.100 [mm], for example, 0.040 [mm], and a core wire having a diameter of 0.4 [mm]. Are wound around a parallel arrangement of two pieces at a pitch of 0.05 [mm] to 0.07 [mm]. Accordingly, the radius of the semicircular portion is 0.24 [mm], and the length of the straight portion is 0.4 [mm]. Each filament element (coil) 131, 132, 133, 134 has a coil length L _s4 (see FIG. 4) of 4 [mm], a maximum width W _max (see FIG. 5) of 0.88 [mm], The minimum width W _min (see FIG. 5) is 0.48 [mm].

The filament elements (coils) 131, 132, 133, and 134 may be manufactured by winding the tungsten wires around the core wires arranged in parallel and adjacently at the pitch. In such a case, the coil length Ls ₄ (see FIG. 4) of each filament element (coil) 131, 132, 133, 134 is further shortened, and a region contributing to the central illuminance in the reflecting mirror 112 (hereinafter referred to as “central illuminance”). The ratio of the filament body 127 in the “contribution region”) can be further improved, which is preferable.

Thus, as the maximum width Wmax of the filament element (coil) in the outline of the filament element (coil) 131, 132, 133, 134 viewed from the longitudinal direction is increased, each filament element (coil) 131, 132, The coil length Ls ₄ of 133 and 134 can be shortened, but at the same time, the gap between the filament elements (coils) is narrowed and the vibration resistance, impact resistance and life are reduced. It is more preferable to determine the maximum width Wmax as long as the impact and life are not impaired.

  Here, a plurality of filament elements (coils) 131, 132, 133, and 134 constituting the filament body 127 are regarded as one coil, that is, a filament body (enclosed by a broken line in FIGS. 4 and 5), and a reflecting mirror. 112 so that one coil (filament body) in the combination with 112 falls within a region (hereinafter simply referred to as “center illuminance contribution region”) that greatly contributes to the central illuminance in the reflector 112. The shape, that is, the shape (excluding a substantially circular shape), dimension, and arrangement (including the interval between the coils (filament elements)) of each filament element (coil) 131, 132, 133, 134 is appropriately determined. Therefore, if the filament body 127 falls within the central illumination contribution region, the dimensions and shape of the filament body 127, that is, the shapes (excluding the substantially circular shape), dimensions, and dimensions of the filament elements (coils) 131, 132, 133, and 134, The arrangement is not limited to that described above. However, as described above, generally, the wire length and wire diameter of the tungsten wire constituting the filament body 127 are substantially determined according to the rated voltage, rated power, and rated life time (for example, 3000 hours) of the halogen bulb 114. Therefore, the shape (excluding the substantially circular shape) and dimensions of the filament elements (coils) 131, 132, 133, and 134 are appropriately determined within the range of the strand length and strand diameter. As an example, the tungsten wire has a wire length of, for example, 420 [mm] to 480 [mm] and a wire diameter of, for example, 0.05 [mm] to 0.06 [though] used for a halogen light bulb with a rated power of 65 [W]. mm], the wire length of the tungsten wire used for the halogen light bulb with the rated power of 20 [W] is, for example, 250 [mm] to 300 [mm], and the wire diameter is 0.02 [mm] to 0.03 [mm]. The tungsten wire has a wire length of, for example, 540 [mm] to 620 [mm] and a wire diameter of 0.07 [mm] to 0.08 [mm], although it is used for a halogen light bulb with a rated power of 100 [W]. It is.

Next, the positional relationship between the filament elements (coils) 131, 132, 133, and 134 is as shown in FIGS.
That is, as shown in FIG. 4, one end face of each filament element (coil) 131, 132, 133, 134 is on substantially the same plane. Further, since the coil lengths L _{s4 of} the filament elements (coils) 131, 132, 133, and ₁₃₄ are all the same, the other end surfaces of the filament elements (coils) 131, 132, 133, and 134 are also substantially on the same plane. is there. In particular, among the end surfaces of the filament elements (coils) 131, 132, 133, and 134, it is preferable that the end surfaces opposite to the sealing portion 120 are respectively located on substantially the same plane. Thereby, the illumination intensity to the irradiation surface irradiated by each filament element (coil) 131,132,133,134 can be made uniform, and a uniform light distribution curve can be obtained.

Further, as shown in FIG. 5, when each filament element (coil) 131, 132, 133, 134 is viewed from the longitudinal direction, the filament element (coil) 131 has a central axis a _{41 in the} longitudinal direction of the bulb 115. Located on the longitudinal central axis X ₆ , the longitudinal central axes a ₄₁ , a ₄₂ , a ₄₃ , a _{44 of the} filament elements (coils) 131, 132, 133, 134 are in the longitudinal direction of the bulb 115. it is parallel to the central axis X ₆ in. The filament element (coil) 132 has, in a plane perpendicular to the coil axis direction, a center line b ₄₂ passing through the centroid across the maximum width portion and straddling the Width of the filament element (coil) 131 across the maximum width portion. The distance r ₄ between the longitudinal center axis a ₄₂ and the longitudinal center axis a ₄₁ of the filament element (coil) 131 is 0.88 [mm], which is parallel to the passing center line b ₄₁ . It is arranged at the position.

The filament element (coil) 133 crosses the maximum width portion of the filament element (coil) 131 and the center line b ₄₃ passing through the centroid across the maximum width portion in a plane perpendicular to the coil axis direction. as the center line _{b 41} crosses the 30 [°] through, yet the distance _{r 4} is 0 between the longitudinal central axis _{a 41} in the longitudinal direction of the central axis _{a 43} and the filament element (coil) 131. It is arranged at a position of 88 [mm]. The filament element (coil) 134 extends across the maximum width portion of the filament element (coil) 131 and the center line b ₄₄ passing through the centroid across the maximum width portion in a plane perpendicular to the coil axis direction. as the center line _{b 41} crosses the 30 [°] through, yet the distance _{r 4} is 0 between the longitudinal central axis _{a 41} in the longitudinal direction of the central axis _{a 44} and the filament element (coil) 131. It is arranged at a position of 88 [mm]. A distance r ₅ between the central axis a _{43 of the} filament element (coil) 133 and the central axis a ₄₄ of the filament element (coil) 134 is 1.52 [mm].

Here, adjacent filament elements (coils) (131, 132), (131, 134), (132, 133), (132, 134), (133, 134) are used to obtain a compact filament body 127. Are as close as possible to each other. However, if adjacent filament elements (coils) (131, 132), (131, 134), (132, 133), (132, 134), (133, 134) are too close, When vibration is applied to the halogen bulb 114, adjacent filament elements (coils) (131, 132), (131, 134), (132, 133), (132, 134), (133, 134) vibrate. There is a risk of contact and short circuit. The filament elements (coils) (131, 132), (131, 134), (132, 133), (132, 134), and (133, 134) are most adjacent to each other than the other parts. However, since the temperature of the filament elements (coils) 131, 132, 133, and 134 becomes high, the tungsten wire tungsten is apt to evaporate, which may shorten the life. Therefore, even when vibration is applied to the halogen bulb 114 during lighting, adjacent filament elements (coils) (131, 132), (131, 134), (132, 133), (132, 134), (133) , along with 134) to prevent a short circuit in contact, in order to prevent life shortening, the distance _{r 4} is preferably in the 0.88 [mm] or more.
<< Effect of Lighting Device with Halogen Bulb Mounted in Embodiment 1 >>
As described above, according to the configuration of the illuminating device 110 according to the first embodiment of the present invention, since the single-winding coil is used first, vibration resistance can be increased as compared with the multiple-winding coil. The pitch can be made sufficiently smaller than the pitch of the multi-winding coil, and secondly, the single-winding coil is divided into a plurality of coils, and the coils (filament elements) 131, 132, 133, 134 are arranged in the longitudinal direction. Therefore, the filament elements (coils) 131, 132, 133, and 134 have different contours from the substantially circular shape, preferably flat shapes such as rectangular shapes and substantially track shapes (oval shapes). The axial length Ls _4, that is, the length of the filament body 127 in the longitudinal direction can be shortened. As a result, the ratio of the filament body 127 existing in the central illuminance contribution region in the reflecting mirror 112 can be increased, and the light collection efficiency can be improved.

Moreover, in the bulb 115, the filament element (coil) 131 is arranged on the optical axis Y ₆ of the reflecting mirror 112 (axis X _{6 of the} bulb 115) so that the longitudinal center axis _a41 is located. Compared with the case where the filament element (coil) is not arranged on the optical axis Y ₆ of the reflecting mirror 112 (axis X _{6 of the} bulb 115), the central illuminance can be improved and the light collection efficiency can be improved.

In the first embodiment described above, the case where the lighting fixture 113 (including the reflecting mirror 112) as shown in FIG. 1 is used has been described. However, various known lighting fixtures can be used instead of the lighting fixture 113. Even in the case of using (including a reflecting mirror), the same effect as described above can be obtained. In other words, according to the configuration of the halogen light bulb 114 used in the illumination device 110 according to the first embodiment of the present invention, the single coil is used first as described above, so that it is different from the multiple coil. The vibration can be increased, the pitch can be made sufficiently smaller than the pitch of the multiple coils, and secondly, the single coil is divided into a plurality of pieces, and the filament elements (coils) 131, 132, since the outer shape viewed 133 from the longitudinal direction is set to be a different shape than the substantially circular shape, it is possible to shorten sufficiently the optical axis Y ₆ direction as filaments 127, as a result In the state of being incorporated in the reflector of a known appropriate lighting fixture, the ratio of the filament body 127 existing in the central illuminance contribution region in the reflector is increased. The light collection efficiency can be improved.
<Evaluation test>
Next, the evaluation test for confirming the effect of the illuminating device 110 which is the 1st Embodiment of this invention was done. However, in order to simplify the test, the halogen bulb 114 (hereinafter simply referred to as “the product A of the present invention”) is not a lighting device itself, but a known halogen bulb with a reflecting mirror (manufactured by Matsushita Electric Industrial Co., Ltd., product number: JDR110V65WKN / 5E11) reflector (including front glass) (narrow angle type), another known halogen lamp with reflector (Matsushita Electric Industrial Co., Ltd., product number: JDR110V65WKM / 5E11) reflector (including front glass) (Medium-angle type), and another known halogen bulb with a reflector (made by Matsushita Electric Industrial Co., Ltd., product number: JDR110V65WKW / 5E11) incorporated in a reflector (including front glass) (wide-angle type) An evaluation test was conducted.

  Then, five halogen bulbs with reflectors of each mirror angle are produced, and each of the produced halogen bulbs with reflectors is lit at rated power and rated voltage, and the distance from the halogen bulb with reflectors is 1 [m] away. The central illuminance [lx] on the irradiated surface was measured. Of course, the value of the central illuminance in this experiment is not the value as the lighting device, but is equivalent to the value as the lighting device.

  For comparison, the rated power of 65 [W] (rated voltage of 110 [rated voltage] used in the lighting device 110 according to the first embodiment of the present invention is used except that a triple-wound coil is used as the filament body. V]) 15 halogen bulbs (hereinafter referred to as “Comparative Product A”) having the same configuration as the halogen bulb 114 having a rated power of 65 [W] (rated voltage 110 [V]) are produced. Each of the comparative products A was incorporated into the same known reflecting mirror (including the front glass) as the product A of the present invention, and the central illuminance [lx] was measured.

  The triple-winding coil used had a strand length of 460 [mm], a strand diameter of 0.052 [mm], and a primary mandrel diameter of 0.12 [mm]. The primary coil pitch is 0.14 [mm], the secondary coil mandrel diameter is 0.28 [mm], the secondary coil pitch is 0.55 [mm], and the tertiary coil mandrel diameter is 1.2 [mm]. mm], and the pitch of the tertiary coil is 1.5 [mm].

Further, the value of the central illuminance [lx] described later indicates an average value of five samples. Furthermore, since “light collection efficiency” is defined as illuminance per power [lx / W] here, the contrast between the central illuminance of the product A of the present invention and the central illuminance of the comparative product A is substantially the product of the present invention. It becomes contrast with the condensing efficiency of A and the condensing efficiency of the comparative product A.
As a result of the experiment, the center illuminance of the product A of the present invention was 9390 [lx] for the narrow angle type, 5092 [lx] for the medium angle type, and 2072 [lx] for the wide angle type. The illuminance was 5587 [lx] for the narrow angle type, 3005 [lx] for the medium angle type, and 1421 [lx] for the wide angle type.

Thus, in the product A of the present invention, the central illuminance is 1.68 times that of the narrow angle type, 1.69 times that of the medium angle type, and 1.45 times that of the wide angle type, as compared with the comparative product A. I understand.
The beam angle of the product A of the present invention was almost the same as that of the comparative product A in each beam angle type.
Here, in this comparison, the halogen bulbs of the product A of the present invention and the product A of the comparison product A were lit with the same power (65 [W]), so the improvement rate of the illuminance is the light collection efficiency [lx / W]. This is consistent with the improvement rate. In other words, it was confirmed that the product A of the present invention improved the light collection efficiency over the comparative product A.
(Embodiment 2)
In the illumination device of the second embodiment, the configuration of the filament body is only different from that of the first embodiment, and thus other explanations are omitted.

FIG. 6 is a schematic perspective view showing a lead wire and a support wire that support the filament body provided in the halogen light bulb in the second embodiment and energize the filament body, and FIG. 7 shows the halogen light bulb in the second embodiment. FIG. 8 is a schematic perspective view showing a filament body provided in the bulb, a lead wire that supports the filament body and energizes the filament body, and FIG. 8 is a filament body provided in the halogen light bulb according to the second embodiment. which is a schematic cross-sectional view taken along the valve axis X ₆ direction perpendicular to the direction.

In the second embodiment, the filament body 136 has the three filament elements (coils) 131, 132, 133 used in the first embodiment as shown in FIGS. 7 and 8, and the three coils 131, 132, The arrangement of 133 is different from that shown in the first embodiment. The arrangement is as follows. That is, as shown in FIG. 7, the longitudinal center axes a ₄₁ , a ₄₂ , a _{43 of the} filament elements (coils) 131, 132, 133 are parallel to the longitudinal center axis X ₆ of the bulb 115, When the filament elements (coils) 131, 132, 133 are viewed from the longitudinal direction, the filament elements (coils) 131 are arranged such that the longitudinal central axis a ₄₁ overlaps the longitudinal central axis X ₆ of the bulb 115. The filament element (coil) 132 has a center line c ₄₂ passing through the centroid across the minimum width portion and a center line c passing over the minimum width portion of the filament element (coil) 131 and passing through the centroid. ₄₁ and is arranged to be substantially on the same axis, yet the central longitudinal axis a ₄ in the longitudinal direction of the central axis a ₄₂ and the filament element (coil) 131 Distance r ₆ are arranged in a position where the 0.88 [mm], the filament element (coil) 133, the filament element centerline c ₄₃ through its centroid across its minimum width portion between the (Coil) 131 is arranged so as to be on the same axis as the center line c ₄₁ across the minimum width portion of the (coil) 131 and passing through the centroid, and the longitudinal direction of the central axis a _{43 in the} longitudinal direction and the longitudinal direction of the filament element (coil) 131 Is disposed at a position where the distance r _{7 from} the center axis a ₄₁ of the lens is 0.88 [mm].

The center lines c ₄₁ , c ₄₂ , c ₄₃ pass through the longitudinal central axes a ₄₁ , a ₄₂ , a ₄₃ of the filament elements (coils) 131, 132, 133, and the axes a ₄₁ , a _{43 In the} plane perpendicular to ₄₂ , a ₄₃ , the straight line intersects the center lines b ₄₁ , b ₄₂ , b ₄₃ perpendicular to the center lines b ₄₁ , b ₄₂ , b ₄₃ across the maximum width portions of the filament elements (coils) 131, 132, 133.

Although not shown, when the core wire diameter 0.4 [mm] is 100 [%], a filament element (coil) is formed using a core wire whose diameter is increased within a range of 110 [%] to 200 [%], for example. May be produced. In such a case, the coil length Ls ₄ in the longitudinal direction of the filament elements (coils) 131, 132, 133 is further shortened, and the ratio of the filament elements (coils) 131, 132, 133 occupying in the central illuminance contribution region is increased. ,preferable. In this case, the gap between the filament elements (coils) 131, 132, 133 is narrowed, and there is a risk that the impact resistance, earthquake resistance, and life may be reduced. More preferably, the gap is adjusted so as to widen.
<< Effect of Lighting Device with Halogen Bulb in Embodiment 2 >>
In the illuminating device according to the second embodiment, compared to the first embodiment, in the filament body 136, the filament element (coil) 131 on the optical axis Y6 of the reflecting mirror 112 (the central axis X6 of the bulb 115) and the axes thereof are Since the number of parallel filament elements (coils) is reduced, the light emitted from the filament element (coil) 131 on the optical axis Y6 of the reflecting mirror 112 (the central axis X6 of the bulb 115) is converted into the filament element (coil). The light is not blocked by the filament elements (coils) arranged around 131, and can contribute to the improvement of the central illuminance, and the light collection efficiency can be improved.

Furthermore, in the illumination device according to the second embodiment, the number of filament elements (coils) in the filament body is reduced as compared with the first embodiment, so that the gap between the filament elements (coils) can be increased. Impact resistance, vibration resistance and life can be improved.
In addition, in the illumination device according to the second embodiment, the filament elements (coils) 131, 132, 133 are provided in the bulb 115 so that the axes of the filament elements (coils) 131, 132, 133 are arranged on the same plane. Can be made uniform.

<Evaluation test>
{Central illuminance (light collection efficiency) comparison test}
The central illuminance of the illumination device 110 provided with the filament body 136 according to the second embodiment of the present invention is improved as compared with that of the illumination device 110 provided with the filament body 126 according to the first embodiment. A comparative test was conducted to confirm.
(Filament element (coil) dimensions)
Coil wire diameter: 0.053 [mm]
Coil wire length: 463 [mm]
Total coil length: 5.5 [mm]
Coil pitch (coil wire center axis distance): 0.074 [mm]
Coil cross section outline: Track shape (oval shape)
Maximum coil width (Wmax): 1.0 [mm]
Coil minimum width (Wmin): 0.5 [mm]
(Example 1) The filament body of Example 1 includes three filament elements (coils), and each filament element (coil) is arranged as shown in the second embodiment and has a length. It is 5.5 [mm].

(Comparative Example 1) The filament body of Comparative Example 1 includes four filament elements (coils), and each filament element (coil) is arranged as shown in Embodiment 1 and has a length. It is 4.0 [mm].
(contents of the test)
For each of the filament body of Example 1 and the filament body of Comparative Example 1, a filament element (hereinafter referred to as “central filament element”) disposed on the optical axis of the reflecting mirror is fixed under the following conditions, and the center A simulation test was conducted to determine how the central illuminance changes with the variation in the inter-axis distance between the filament element (hereinafter referred to as the “peripheral filament element”) and the central filament element that surrounds the filament element. It was.
(Other test conditions)
Rated power: 65 [w]
Rated voltage: 110 [V]
Lamp luminous flux: 1100 [lm]
Reflector outer diameter: 50 [mm] (Reflector opening diameter: 41 [mm])
Reflector type: narrow angle type (beam angle: 10 [°], error tolerance: ± 2.5 [°])
(Test results)
The result of the simulation test is shown in FIG. As shown in FIG. 9, in each of Example 1 and Comparative Example 1, it can be confirmed that there is the above-mentioned inter-axis distance having a large central illuminance as compared with a halogen bulb using a conventional filament body. When Example 1 was compared with Comparative Example 1, it was confirmed that the central illuminance of Example 1 was larger than that of Comparative Example 1.

(Discussion)
From the above test results, since the luminous flux emitted from the central filament element is shielded by the peripheral filament element, in Comparative Example 1 where the number of peripheral filament elements is larger than that in Example 1, the central illuminance is lower than that in Example 1. It is thought.
Therefore, in the filament body, when the central filament element is arranged on the optical axis of the reflecting mirror and the peripheral filament element is arranged around it, the central illuminance decreases as the number of the peripheral filament elements is increased. It is thought that it shows a tendency.

{Optimum clearance evaluation test}
In the filament body 136 of the second embodiment, both the simulation test and the actual measurement test were performed in order to confirm the gap between the central filament element and the peripheral filament element that can maximize the center illuminance. .
Since the dimensions of the filament element and other test conditions are the same as those in the evaluation test, the description thereof is omitted.

(Contents of simulation test)
In the halogen light bulb having the filament body of Example 1 used in the evaluation test, the gap between the central filament element and the peripheral filament element was varied, and the central illuminance changing along with it was measured. A simulation test was conducted to find the optimum gap.

(Results of simulation test)
The result of the simulation test is shown in FIG. As shown in FIG. 10, when the gap between the filament elements is 0.015 [mm], the gap is lower than that of the halogen lamp provided with the conventional filament body, but the gap is 0.02 [mm] to 0.1 [mm]. mm], the central illuminance increases as compared to the conventional one, and the central illuminance increases as the gap increases, so that the gap between the filament elements is 0.1 [mm] to 0.2 [mm]. ], The central illuminance becomes maximum, and when the gap between the filament elements is 0.2 [mm] or more, the central illuminance decreases as the gap becomes larger. It was confirmed that the central illuminance was larger at 02 [mm] or more and 1.3 [mm] or less as compared with the halogen bulb provided with the conventional filament body.

(Consideration of simulation test results)
When the gap between the filament elements is as close as possible to 0 [mm], the light emitted from each coil is blocked by each coil, so the central illuminance is considered to be lower than the conventional one. The central illuminance is maximized when the gap between the filament elements is 0.1 [mm] or more and 0.2 [mm] or less. In the case of the gap, the ratio of the filament body existing in the central illuminance contribution region is as follows. When the gap exceeds 0.2 [mm], the proportion of filament bodies existing in the central illuminance contribution region gradually decreases, and as a result, the gap exceeds 1.3 [mm]. At that time, the central illuminance is considered to be lower than the conventional one.

Therefore, under the restriction of the rated voltage and the like, theoretically, if the gap between the filament elements is 0.02 [mm] or more and 1.3 [mm] or less, the central illuminance is increased and the light is condensed as compared with the conventional one. It is thought that efficiency can be improved.
(Contents of actual test)
In the halogen light bulb having the filament body of Example 1 used in the evaluation test, the gap between the central filament element and the peripheral filament element was changed, and the central illuminance changing along with it was measured. An actual measurement test was conducted to find the optimum gap to be obtained. At the same time, in order to find the optimum gap at which a desired beam angle can be obtained, the beam angle that varies with the gap was actually measured while the gap was varied.
However, in order to simplify the test, not a lighting device itself but a known halogen bulb (Matsushita Electric Industrial Co., Ltd., product number: JDR110V65WKN / 5E11, mirror outermost diameter: 50 [mm], mirror opening diameter: 41 [ mm]), the filament body was replaced with the filament body according to the comparative test, and a comparative test was performed.

  In the comparative test, the filament bodies of the samples were all set with a wire diameter of 0.053 [mm], a wire length of 463 [mm], and a pitch of 0.074 [mm], and wound with tungsten. The filament element has a substantially track shape (oval shape) in a plane perpendicular to the axis, and the maximum width Wmax is 1 [mm] and the minimum width Wmin is 0. .5 [mm] is set.

(Result of measurement test)
FIG. 11 shows the result of the actual measurement test showing the relationship between the gap between the filament elements and the central illuminance, and FIG. 12 shows the result of the actual measurement test showing the relationship between the gap between the filament elements and the beam angle.
As can be seen from FIG. 11, when the gap is less than 0.3 [mm], arc discharge occurs between the filament elements, and a short circuit occurs, so that the central illuminance cannot be measured. When the gap is 0.3 [mm] or more and less than 1.25 [mm], the central illuminance increases compared to the conventional one, and when the gap is 1.25 [mm] or more, the central illuminance is lower than the conventional one. became.

  As can be seen from FIG. 12, when the gap is less than 0.3 [mm], the beam angle cannot be measured for the above reason, and the gap is 0.3 [mm] or more and 0.75 [mm]. In the following, the measured beam angle is within the set beam angle standard (7.5 degrees or more and 12.5 degrees or less), and when the gap is larger than 0.75 [mm] and 1.1 [mm] or less. When the measured beam angle is less than the lower limit (15 degrees) of the beam angle generally called the medium angle type and the gap is larger than 1.1 [mm], the measured beam angle is generally the medium angle type. It was within the range of the beam angle called.

(Consideration on the result of actual measurement test)
From the above test results, in order to satisfy the set beam angle standard (7.5 degrees or more and 12.5 degrees or less) under the constraints of the rated voltage, etc., and to increase the central illuminance and improve the light collection efficiency, The gap is preferably set to 0.3 [mm] or more and 0.75 [mm] or less. In addition, if it exceeds the set standard (7.5 degrees or more and 12.5 degrees or less) and may be less than the lower limit of the beam angle generally called a medium angle type, the gap is set to 0.3 [mm] or more and 1 .1 [mm] or less may be set.

{Center illuminance and light distribution characteristics evaluation test}
An evaluation test was performed to confirm that the configuration of the filament body 136 in the second embodiment can increase the central illuminance and make the light distribution uniform.
Since the coil wire diameter, coil wire length, and other conditions are as shown in the central illuminance (light collection efficiency) comparison test, description thereof is omitted here.

Samples prepared in the evaluation test are as follows.
FIG. 13 is a schematic configuration diagram schematically showing a coil arrangement in a plane perpendicular to the coil axis for each sample used in the evaluation test.
Comparative Example 1 FIG. 13A is a schematic cross-sectional view of the filament body of Comparative Example 1 cut along a plane perpendicular to the axis of the secondary coil. As shown in FIG. 13 (a), the filament body of Comparative Example 1 is a so-called double-winding coil, and more specifically, a primary coil obtained by winding the filament body in a spiral shape is further wound to form a secondary coil. Is forming.

  Comparative Example 2 FIG. 13B is a sectional view of the filament body of Comparative Example 2 cut along a plane perpendicular to the central axis. As shown in FIG. 13 (b), in the filament body of Comparative Example 2, four filament elements (coils) are provided, and a substantially track (oval) coil (filament element) in a plane perpendicular to the coil winding axis. ) Are arranged in four directions, the X axis spans the maximum width of the two filament elements (coils), and the Y axis straddles the maximum width of the remaining two filament elements (coils). Four filament elements are arranged so that a point perpendicular to the axis and the optical axis of the reflecting mirror overlap.

  Comparative Example 3 FIG. 13C is a cross-sectional view of the filament body of Comparative Example 3 cut along a plane perpendicular to its central axis. As shown in FIG. 13 (c), the filament body of Comparative Example 3 is 45 [about the axis perpendicular to the X and Y axes on the plane perpendicular to the coil winding axis. °] so that the optical axis of the reflecting mirror is arranged in the minimum gap between adjacent coils (filament elements) in which the center line passing through the orthogonal point and straddling the maximum width portion is arranged at an angle of 45 °. In other words, the central axis of the filament body is arranged so as to deviate from the optical axis.

  (Comparative Example 4) FIG. 13D is a schematic cross-sectional view of the filament body of Comparative Example 4 cut along a plane perpendicular to its central axis. As shown in FIG. 13 (d), in the filament body of Comparative Example 4, three filament elements (coils) are provided, and a substantially track (oval) coil (filament element) in a plane perpendicular to the coil winding axis. ) Are arranged so as to form a right-angled isosceles triangle when connecting the central axes of the filament elements (coils), and the intersection of the isosceles overlaps the optical axis of the reflecting mirror.

  (Embodiment 1) FIG. 13E is a cross-sectional view of the filament body of Embodiment 1 cut along a plane perpendicular to its central axis. As shown in FIG. 13 (e), the filament body of Example 1 is the same as the filament body shown in Embodiment 1, and in this filament body, two filament elements in a plane perpendicular to the coil winding axis. (Coil) 131 and 132 are arranged so that the center line straddling the shortest width overlaps with the Y axis, the Y axis and the X axis are orthogonal, and the orthogonal point and the optical axis of the reflecting mirror overlap. Yes.

  (Embodiment 2) FIG. 13 (f) is a cross-sectional view of the filament body of Embodiment 2 cut along a plane perpendicular to the central axis. As shown in FIG. 13 (f), the filament body of Example 2 is the same as the filament body shown in Embodiment 2, and in this filament body, three filament elements in a plane perpendicular to the coil winding axis. (Coils) A center line straddling the minimum width part of each of 131, 132, 133 is arranged on the X axis, a center line straddling the maximum width part of the filament element 131 is arranged on the Y axis, and the X axis and the Y axis The axes are orthogonal to each other, and the orthogonal point and the optical axis of the reflecting mirror overlap each other.

  Example 3 FIG. 13G is a cross-sectional view of the filament body of Example 3 cut along a plane perpendicular to its central axis. As shown in FIG. 13 (g), the filament body of Example 3 is different from the filament body of Example 2 in the ratio between the maximum width and the minimum width of the filament element (coil) in a plane perpendicular to the coil winding axis. Therefore, other description is omitted. Each filament element constituting the filament body is formed so that the ratio of the maximum width to the minimum width is 3: 1 in a plane perpendicular to the coil winding axis.

(Contents of evaluation test)
Each of the above samples is turned on under the above-described conditions, the central illuminance at the irradiation surface 1 [m] away from the light source is measured, the illuminance ratio of each sample is obtained with reference to the central illuminance of Comparative Example 1, and FIG. The beam angles at the irradiation surfaces corresponding to the X-axis and Y-axis indicated by 13 were measured, and the uniformity of light distribution on the irradiation surface was evaluated from the measurement results. The evaluation criteria are as follows. That is, the beam angle in the X axis and the Y axis is 7.5 degrees or more and 12.5 degrees or less, and the difference from the other beam angle with respect to the beam angle in one of the X axis and the Y axis is determined. When calculated, when the difference was 10% or less of the narrower beam angle, it was determined that the uniformity of light distribution on the irradiated surface was good.

  (Results of evaluation test)

  The results of the evaluation test are shown in Table 1. As shown in Table 1, when the other samples were evaluated based on the central illuminance and beam angle of the sample of Comparative Example 1, the sample of Comparative Example 2 was between the X-axis beam angle and that of the Y-axis. Although there is no big difference, all the beam angles are significantly higher than the desired beam angle range of 7.5 degrees or more and 12.5 degrees or less, and the central illuminance is lower than that of Comparative Example 1 (the illuminance ratio is reduced). However, the light distribution near the concentric circle is obtained on the irradiated surface, but the central portion is dark and the light distribution cannot be made uniform.

In the sample of Comparative Example 3, the central illuminance is increased as compared with the sample of Comparative Example 1 (increased by 17% in terms of the illuminance ratio), but the Y-axis beam angle exceeds 12.5 degrees. In addition, it is larger than that of the X axis, and the light distribution is irregular on the irradiated surface, far from the concentric circles, and the light distribution cannot be made uniform.
In the sample of Comparative Example 4, the central illuminance is increased compared to the sample of Comparative Example 1 (increased by 40% in terms of illuminance ratio), but the X-axis beam angle is less than 7.5 degrees, and the Y-axis The light distribution is irregular on the irradiated surface, far from the concentric circles, and the light distribution cannot be made uniform.

On the other hand, in the sample of Example 1, the central illuminance increases compared to that of Comparative Example 1 (increased by 28% as the illuminance ratio), and the X-axis beam angle and the Y-axis do not differ greatly. Each beam angle falls within the range of 7.5 degrees or more and 12.5 degrees or less, so that a desired narrow beam angle can be obtained and the light distribution can be made uniform.
Further, in the sample of Example 2, the X-axis beam angle and that of the Y-axis do not differ greatly, and both of the beam angles are within the range of 7.5 degrees to 12.5 degrees, and a desired narrow beam angle is obtained. As a result, the central illuminance is larger than that of the first embodiment, and the light distribution can be made more uniform.

In the sample of Example 3, the X-axis beam angle and that of the Y-axis are not significantly different, and both beam angles are within the range of 7.5 degrees to 12.5 degrees, and a desired narrow beam angle is obtained. As a result, the central illuminance is larger than that of the second embodiment, and the light distribution can be made even more uniform.
(Discussion)
From the above results and discussion, in the sample of Example 2, the light emitted from the central filament element is blocked by the peripheral filament element by reducing the number of peripheral filament elements (coils) compared to the sample of Example 1. This can be suppressed, and as a result, the central illuminance can be increased.

In addition, from the above results and considerations in the sample of Comparative Example 4 and the sample of Example 2, it is possible to obtain a uniform light distribution by providing the filament element in the bulb so that the winding axis of the filament element is arranged on the same plane. It is thought that we were able to plan.
Further, from the above results and discussion, the maximum width is compared with the minimum width in the substantially track (oval) -shaped contour of each filament element in a plane perpendicular to the winding axis of the filament element as in the sample of Example 3. The length in the winding axis direction of each filament element can be shortened as the size increases, thereby increasing the proportion of filament bodies present in the central illuminance contribution region, and thus the central illuminance is further increased. Can be increased. However, as the maximum width is increased compared to the minimum width, the impact resistance, vibration resistance, and life expectancy will tend to decrease. It is considered that it is more preferable to enlarge it.
(Embodiment 3)
FIG. 14 is a schematic cross-sectional view of a halogen light bulb with a reflector in the third embodiment.

As shown in FIG. 14, the third rated power 65 in the form of implementation of [W] reflector with halogen bulb 137 (Rated voltage 110 [V]) of the present invention, the mirror diameter phi ₅ is 35 [mm] ˜100 [mm], for example, a concave reflecting mirror 138 having an outermost diameter of 50 [mm], a halogen light bulb 139 disposed inside the reflecting mirror 138, and, for example, E attached to the end of the reflecting mirror 138 And a base 140 having a shape.

A central axis X _{8 in} the longitudinal direction of the bulb 142 of the halogen bulb 139 substantially coincides with the optical axis Y ₇ of the reflecting mirror 138.
The reflecting mirror 138 is made of hard glass or quartz glass, and has an opening 143 for irradiating light at one end and a cylindrical neck 144 at the other end, and a spheroidal surface or a paraboloid on the inner surface. A reflecting surface 145 of a rotating body composed of a surface or the like is formed. The opening 143 is provided with a front glass 146 and is fixed by a known fastener (not shown). As a method for fixing the front glass 146, a known adhesive (not shown) may be used instead of the stopper, or a stopper and an adhesive may be used in combination. However, the front glass 146 is not necessarily provided.

A base 140 is provided outside the neck portion 144 so as to cover almost the entire neck portion 144, and is fixed thereto with an adhesive 147. On the other hand, the sealing portion 148 of the halogen light bulb 139 is inserted into the neck portion 144 and is similarly fixed through an adhesive 147.
In addition to a metal film such as aluminum or chromium, a multilayer interference film made of silicon dioxide (SiO ₂ ), titanium dioxide (TiO ₂ ), magnesium fluoride (MgF), zinc sulfide (ZnS), or the like is formed on the reflective surface 145. Has been. You may form a facet in the reflective surface 145 as needed.

  The halogen light bulb 139 includes a bulb 142 made of quartz glass, hard glass, or the like, and a light emitter 127 used in the halogen light bulb 114 in the lighting device 110 according to the thirteenth embodiment of the present invention. . That is, the halogen bulb 139 has the same configuration as the halogen bulb 114 except that the shape of the bulb 142 is different. Accordingly, the details of the configuration of the halogen bulb 139 will be described mainly on the differences from the configuration of the halogen bulb 114.

  For example, one end of an internal lead wire 128 made of tungsten is electrically and mechanically connected to both ends of the light emitter 127. The other end portion of the internal lead wire 128 is connected to one end portion of the external lead wire 130 through a metal foil 129 made of molybdenum that is sealed with a sealing portion 148. The other end of the external lead wire 130 is led out of the valve 142 and is electrically connected to the terminal portions 141a and 141b of the base 140, respectively.

  The bulb 142 includes a tip-off portion 149 which is a residual mark of sealing cut, a light emitting portion 150 having a substantially cylindrical shape with one end (end portion on the tip-off portion 148 side) tapered, and a known pinch seal method. The sealing portions 148 formed by the above are sequentially formed. Although the visible light transmitting infrared reflecting film is not formed on the outer surface of the bulb 142, a visible light transmitting infrared reflecting film may be formed on the outer surface of the light emitting unit 150 or the like as necessary.

  The shape of the bulb 142 is not limited to the tip-off portion 149, the substantially cylindrical light-emitting portion 150 whose one end is tapered, and the sealing portion 148, which are successively formed. (It may not exist depending on the case), bulb, tip-off part (may be absent in some cases), substantially spheroid Shaped light-emitting part, reduced-diameter part, tube part and sealed part are successively connected to each other, a tip-off part (may be omitted in some cases), a substantially spheroidal light-emitting part, reduced-diameter part And a valve in which a sealing part is successively formed, or a chip-off part (which may not be provided in some cases), a substantially spheroidal light emitting part, and a sealing part that are sequentially formed. Known in the art can be used various shapes of the valve. Of course, instead of the substantially spheroid shape, the light emitting portion may have a substantially spherical shape or a substantially complex ellipsoid shape.

As shown in FIGS. 4 and 5, the luminous body 127 has a plurality of, for example, four coils 131, 132, 133, and 134 arranged in parallel. These four coils 131, 132, 133, and 134 are electrically connected in series. In addition, the position of the light emitter 127 with respect to the reflecting mirror 138 is a position including the focal point F ₇ of the reflecting mirror 138. That is, the light emitter 127, a pillar body to resemble the four coils 131, 132, 133 integrally when the (portion indicated by the broken line in FIG. 4 and FIG. 5), the focal point _{F 7} its columnar body Located inside or on the surface. Thus, when viewed in the actual light emitter 127, the focal point _{F 7} is on the interior or surface of the coils 131, 132, 133 or each coil (131, 132), (131, 133), (131 and 134 ), (132, 133), (132, 134), (133, 134). In the example shown in FIG. 14, the center point of the light emitter 127 is substantially located on the focal point F _{7 of the} reflecting mirror 138. However, as shown in FIG. 5, the point F ₀ on the surface of the light emitter may be located on the focal point F ₇ .

In FIG. 14, the coils 131, 132, 133, and 134 are integrated, and the light emitter 127 is schematically shown as a single column.
Next, the positional relationship between the coils 131, 132, 133, and 134 is as shown in FIGS.
That is, as shown in FIG. 4, the one end surfaces of the coils 131, 132, 133, and 134 are substantially on the same plane. Further, since the coil lengths L _s4 of the coils 131, 132, 133, and ₁₃₄ are all the same, the other end surfaces of the coils 131, 132, 133, and 134 are also substantially on the same plane. In particular, among the end surfaces of the coils 131, 132, 133, and 134, it is preferable that the end surfaces opposite to the sealing portion 120 are located on substantially the same plane. Thereby, the illumination intensity to the irradiation surface irradiated by each coil 131,132,133,134 can be made uniform, and a uniform light distribution curve can be obtained.

In addition, as shown in FIG. 5, when each coil 131, 132, 133, 134 is viewed from the longitudinal direction, the coil 131 and the coil 133 are 1.2 with the central axis X ₇ in the longitudinal direction of the valve 142 interposed therebetween. The coils 131 and 133 are opposed to each other with an interval of [mm], and the long axis directions b ₄₁ (b ₄₃ ) of the coils 131 and 133 are substantially coincident with each other and intersect perpendicularly to the central axis X ₇ . . On the other hand, the coil 132 and the coil 134, opposed apart 0.4 [mm] across the longitudinal central axis _{X 7} of the valve 142, and the long axis direction _{b 42} of each coil 132, 134 ( b ₄₄ ) substantially coincides with each other and intersects with the central axis X ₇ perpendicularly. The major axis direction b ₄₁ (b ₄₃ ) and the major axis direction b ₄₂ (b ₄₄ ) intersect perpendicularly, and the intersection is on the central axis X ₇ .

  Here, adjacent coils (131, 132), (131, 134), (132, 133), (132, 134), (133, 134) are as long as possible in order to obtain a compact luminous body 127. It is preferred that they are close. However, if the adjacent coils (131, 132), (131, 134), (132, 133), (132, 134), (133, 134) are too close to each other, if the halogen bulb 114 is lit, When vibration is applied, adjacent coils (131, 132), (131, 134), (132, 133), (132, 134), (133, 134) may come into contact with each other and short circuit. is there. Further, the portions where the coils (131, 132), (131, 134), (132, 133), (132, 134), (133, 134) are most adjacent to each other are more coiled than the other portions. Since the temperatures of 132, 133, and 134 become high, the tungsten wire of the tungsten wire evaporates violently, which may shorten the life. Therefore, even when the halogen bulb 114 is vibrated during lighting, the adjacent coils (131, 132), (131, 134), (132, 133), (132, 134), (133, 134) are In order to prevent a short circuit due to contact, it is preferable that the thickness be 0.2 [mm] or more in order to prevent a short life.

As described above, according to the configuration of the reflector-equipped halogen light bulb 137 according to the third embodiment of the present invention, since the single-winding coil is used first, the vibration resistance is increased unlike the multiple-winding coil. The pitch can be made sufficiently smaller than the pitch of the multi-winding coil, and secondly, the single-winding coil is divided into a plurality of coils, and the coils 131, 132, 133, and 134 (FIG. 4, since the outer shape viewed see FIG. 5) from the longitudinal direction as a shape different from a substantially circular shape, it is possible to shorten sufficiently the optical axis Y ₇ direction as emitter 127. As a result, it is possible to increase the ratio of the light emitters 127 present in the region contributing to the central illuminance in the reflecting mirror 138, and to improve the light collection efficiency.

  In addition, since the central illuminance can be improved in this way, it is not necessary to improve the central illuminance by forming a visible light transmitting infrared reflecting film like a conventional halogen lamp with a reflector. A halogen light bulb with a reflector using a wound coil, in which a visible light transmitting infrared reflective film is formed on the outer surface of the bulb, can obtain a central illuminance substantially the same as the central illuminance. As a result, the cost of the visible light transmitting infrared reflecting film itself and the cost for the process can be reduced, and the process for forming the film can be omitted, so that the production efficiency can be greatly improved.

In the halogen bulb 137 with a reflector according to the third embodiment of the present invention described above, the filament body 136 of the second embodiment is used instead of the filament body 127 shown in FIGS. Even so, the same effects as described above can be obtained.
(Embodiment 4)
Next, in the lighting device according to the fourth embodiment of the present invention, the halogen lamp 137 with a reflector according to the third embodiment of the present invention is the first embodiment of the present invention shown in FIG. It has the same configuration as that of the lighting device 110 according to the first embodiment of the present invention except that it is attached to a lighting fixture 113 (excluding the reflecting mirror 112) of a certain lighting device 110.

As described above, according to the configuration of the lighting device according to the fourth embodiment of the present invention, since the single-winding coil is used first, unlike the multiple-winding coil, the vibration resistance can be increased. The pitch can be made sufficiently smaller than the pitch of the multi-winding coil, and secondly, the single-winding coil is divided into a plurality of coils, and the coils 131, 132, 133, and 134 (see FIGS. 4 and 5) are formed. since the outer shape when viewed from the longitudinal direction so that a shape different from a substantially circular shape, it is possible to shorten sufficiently the optical axis Y ₆ direction as emitter 127 (see FIG. 1). As a result, it is possible to increase the proportion of the light emitters 127 existing in the region contributing to the central illuminance in the reflecting mirror 138 (see FIG. 14), and to improve the light collection efficiency.

In the lighting device according to the fourth embodiment of the present invention described above, the filament body 136 used in the second embodiment is used instead of the filament body 127 shown in FIGS. 4 and 5. Even if it exists, the effect similar to the above can be acquired.
(Embodiment 5)
The best mode for carrying out the present invention will be described below with reference to the drawings.

As shown in FIG. 15, the halogen lamp 1 with a reflector having a rated power of 65 [W] (rated voltage 110 [V]) according to the first embodiment of the present invention includes a concave reflector 2 and A halogen light bulb 3 arranged inside the reflecting mirror 2 and an E-shaped base 4 attached to the end of the reflecting mirror 2 are provided.
In this embodiment, the mirror diameter phi ₁ of the reflecting mirror 2, 35 [mm] or more 100 [mm] as long or less, in the present embodiment, is set to 50 [mm].

A central axis X _{1 in} the longitudinal direction of the halogen bulb 3 substantially coincides with the optical axis Y ₁ of the reflecting mirror 2.
The reflecting mirror 2 is made of hard glass or quartz glass, and has an opening 5 for irradiating light at one end and a cylindrical neck 6 at the other end, and a spheroidal surface or a paraboloid on the inner surface. A reflecting surface 7 made of a surface or the like is formed. You may form a facet in the reflective surface 7 as needed.

A front glass 8 is provided in the opening 5 and is fixed by a known fastener (not shown), a known adhesive (not shown), or a combination thereof. However, the front glass 8 is not necessarily provided.
On the outside of the neck portion 6, a base 4 is provided so as to cover almost half of the neck portion 6, and is fixed via an adhesive 9. On the other hand, a sealing portion 12 of a halogen bulb 3 to be described later is inserted into the neck portion 6, and is similarly fixed via an adhesive 9.

In addition to a metal film such as aluminum or chromium, a multilayer interference film made of silicon dioxide (SiO ₂ ), titanium dioxide (TiO ₂ ), magnesium fluoride (MgF), zinc sulfide (ZnS), or the like is formed on the reflective surface 7. Has been.
The halogen light bulb 3 is a quartz glass in which a chip-off portion 10 which is a residue of sealing cut, a substantially cylindrical light emitting portion 11, and a sealing portion 12 formed by a known pinch seal method are successively connected. And a bulb 13 made of hard glass or the like, and an assembly 18 in which a filament body 14 which is a light emitter, an internal lead wire 15, a metal foil 16 and an external lead wire 17 are sequentially connected.

A visible light transmitting infrared reflecting film may be formed on the outer surface of the bulb 13 as necessary.
In the light emitting section 11, the above-described filament body 14 is disposed, and a predetermined amount of each of a halogen substance and a rare gas is sealed. One end of an internal lead wire 15 made of tungsten, for example, is connected to both ends of the filament body 14. The other end portion of the internal lead wire 15 is connected to one end portion of the external lead wire 17 through a metal foil 16 made of molybdenum sealed in the sealing portion 12. The other end portion of the external lead wire 17 is led out of the valve 13 and is electrically connected to the terminal portions 4a and 4b of the base 4 respectively.

  As shown in FIGS. 16 and 17, the filament body 14 is composed of a plurality of single-winding coils extending linearly, each of which is made of, for example, tungsten, and each is electrically connected in series 1 It consists of one central filament element 19 and three peripheral filament elements 20, 21, 22. The wire diameter of the tungsten wire constituting the single winding coil is 0.015 [mm] to 0.100 [mm], for example 0.050 [mm].

16 and 17, the central filament element 19 and the peripheral filament elements 20, 21, and 22 are schematically depicted as cylindrical bodies, respectively.
The central filament element 19 has a longitudinal central axis a <b> ₁ substantially positioned on the optical axis Y <b> 1 of the reflecting mirror 2. The peripheral filament elements 20, 21, 22 are arranged around the central filament element 19 so that the longitudinal center axes b 1, c 1, d 1 are substantially parallel to the longitudinal center axis a 1 of the central filament element 19. ing. Further, as shown in FIG. 17, these three peripheral filament elements 20, 21, 22 are perpendicular to the longitudinal center axes b1, c1, d1 and the longitudinal center axis a1 of the center filament element 19, respectively. when connecting such arbitrary plane P ₁ and intersects the intersection, respectively, it is arranged a point on the central axis a1 longitudinal central filament element 19 so as to form a substantially equilateral triangle and the center of gravity ( "centroid") ing. In other words, two peripheral distance _{D 1} is adjacent all substantially equal, and there is one near the filament element 20 (21 or 22) and which between the central filament element 19 and each of the peripheral filaments elements 20, 21, 22 distance _{D 2} between the filament 21 and 22 (20, 22 or 20, 21) means that substantially equal, respectively.

Here, the "are substantially position", it is preferable that the ideal center axis a1 is positioned completely on the optical axis Y ₁ of the reflecting mirror 2, the positioning accuracy in the manufacturing process practical due to variations, sometimes central axis a1 is shifted from the optical axis Y ₁ of the reflecting mirror 2, is meant to include also the case. Also, “substantially parallel” and “substantially equilateral triangle” are also made completely parallel by variation in assembly accuracy in the assembly process of the filament body 14, and it is difficult to form a perfect equilateral triangle. In some cases, the positional relationship and the shape deviate from a perfect equilateral triangle, and this also includes that case. Distance D ₁ and the distance D ₂ is "substantially equal" is also similar.

Further, the center filament element 19 includes the position of the focal point F ₁ of the rotating body forming the reflecting surface 7 as shown in FIG. 16, and the center point A ₁ on the center axis a 1 of the center filament element 19 has a center point A _1. It is arranged so as to be opposite to the opening 5 from the position of the focal point F _1. Further, the peripheral filament elements 20, 21, and 22 follow this, and each of the peripheral filament elements 20, 21, and 22 has points F _b1 , F _c1 , and F _d1 (in FIG. Center points B ₁ , C ₁ , D ₁ including the positions of the points F _b1 , F _c1 ) and on the central axes b ₁ , c ₁ , d _{1 of the} peripheral filament elements 20, 21, 22 (FIG. 16). Then, only the points B ₁ and C ₁ are illustrated) are arranged so as to be located on the opposite side of the opening 5 from the positions of the above points F _b1 , F _c1 , and F _d1 . However, the points F _b1 , F _c1 , F _d1 include the position of the focal point F ₁ of the rotating body forming the reflecting surface 7 and intersect with the plane Q ₁ perpendicular to the optical axis Y ₁ of the reflecting mirror 2. , Points of intersection with the central axes b1, c1, and d1 are shown. As an example, the distance between the focal point F ₁ and the center point A ₁ is 2.35 [mm], and the distance between the points F _b1 , F _c1 , F _d1 and the center points B ₁ , C ₁ , D ₁ Each distance is 1.21 [mm].

Here, it is preferable that the ends on the opening 5 side of the peripheral filament elements 20, 21, and 22 are positioned in substantially the same plane. Thereby, the illumination intensity to the irradiation surface irradiated by each peripheral filament element 20, 21, 22 can be made uniform, and a uniform light distribution curve can be obtained.
In such a filament body 14, the central filament element 19 and the peripheral filament elements 20, 21, and 22 are accommodated in one cylindrical body. Can be regarded as one integrated filament.

The coil lengths of the central filament element 19 and the peripheral filament elements 20, 21, 22 are L _C1 [mm] as the coil length of the central filament element 19, and L _S1 [mm] as the coil length of the peripheral filament elements 20, 21, 22 In this case, the relational expression 0.2 ≦ L _S1 / L _C1 ≦ 0.9 is set for the reason described later. However, the coil lengths L _S1 of the peripheral filament elements 20, 21, 22 are substantially equal to each other. Of course, “substantially equal” means that each coil length L _S1 varies due to variations in the coil manufacturing process as described above.

Generally, the length of the tungsten wire constituting the coil of the filament body 14 is determined according to the rated power of the halogen bulb 3. As an example, the tungsten wire used for the halogen light bulb 3 with a rated power of 65 [W] has a tungsten wire length of, for example, 420 [mm] to 480 [mm], and the tungsten wire used for the halogen light bulb 3 with a rated power of 20 [W]. The length of the tungsten wire used in the halogen light bulb 3 with a rated power of 100 [W] is, for example, 250 [mm] to 300 [mm], and the length of the tungsten wire is, for example, 540 [mm] to 620 [mm]. Accordingly, the coil lengths L _C1 and L _S1 can be adjusted by appropriately changing the coil pitch (interval between adjacent coil portions) p and the maximum outer diameter R ₁ of the coil. As an example, in the case of the one used for the halogen light bulb 3 with a rated power of 65 [W], the pitch p of the single winding coil is 0.05 in both the central filament element 19 and the peripheral filament elements 20, 21, and 22. It is set in the range of [mm] to 0.07 [mm]. Further, the maximum outer diameter _{R 1} of the single turn coil also is set in a range of 0.5 [mm] ~1.2 [mm] in any of the central filament element 19 and the peripheral filaments elements 20, 21, 22 ing.

The distance _{D 1} of the between the central filament element 19 and each of the peripheral filaments elements 20, 21 are preferably set in a range of each 0.1 [mm] ~2.2 [mm] . As a result, the density of the filament body 14 in the central illuminance contribution region can be increased, the central illuminance can be made extremely high, and the central filament element 19 is turned on during lighting as compared with the conventional halogen bulb. It is possible to prevent arc discharge from occurring between the outer filament element 20 and the peripheral filament elements 20, 21 and 22, and disconnection of the central filament element 19 and the peripheral filament elements 20, 21 and 22 due to the arc discharge. On the other hand, when the distance _{D 1} is less than 0.1 [mm], the lighting in an arc discharge is generated between the central filament element 19 and the peripheral filaments elements 20,21,22, central filament element 19 by the arc discharge Or the peripheral filament elements 20, 21, 22 may be broken. Also, if the distance D ₁ is greater than 2.2 [mm], as compared with the conventional halogen lamp, the smaller the density of the filament assemblies 14 in the central illuminance contributing area, it is possible to increase the central illuminance very well The peripheral filament elements 20, 21, and 22 may increase the illuminance in the peripheral area of the central portion on the irradiation surface.

  Here, as the coils constituting the central filament element 19 and the peripheral filament elements 20, 21 and 22, a double-winding coil and a triple-winding coil can be used in addition to the single-winding coil. Therefore, it is preferable to use a single-winding coil that can make the pitch p smaller than a double-winding coil or a triple-winding coil and can increase the density of the filament body 14 in the central illumination contribution region. .

Next, assuming that the coil length of the central filament element 19 is L _C1 [mm] and the coil lengths of the peripheral filament elements 20, 21 and 22 are L _S1 [mm], 0.2 ≦ L _S1 / L _C1 ≦ 0. The reason why it is defined to satisfy the relational expression 9 will be described.
First, with respect to the halogen bulb 1 with a reflector having the rated power of 65 [W], the coil length L _C1 of the central filament element 19 and the coil lengths L _S1 of the peripheral filament elements 20, 21, 22 are various as shown in Table 2. Five pieces of each changed were produced. Then, each manufactured product was turned on at the rated power, and its beam angle (degree) and central illuminance [lx] were examined. As shown in Table 2 and FIG. 18 (relationship between L _S1 / L _C1 and beam angle) The following results were obtained. Further, typical light distribution curves in the case of L _S1 / L _C1 = 0.9 are shown in FIG. 19, and those in the case of L _S1 / L _C1 = 0.6 are shown in FIG.

In each sample prepared, the central filament element 19 and the peripheral filament elements 20, 21 and 22 are each composed of a single wound coil, and the pitch p is 0.05 [mm] to 0.07 [mm], and the maximum outside. The _one having a diameter R1 of 0.65 [mm] was used. The distance _{D 1} is 1.5 [mm].
In Table 2, “beam angle” indicates an average value of five samples. The beam angle of 10 degrees (allowable range: 7.5 degrees to 12.5 degrees), which is the mainstream of those currently on the market, was used as an evaluation standard.

  Further, “center illuminance” indicates an average value of five samples. Currently, a commercially available halogen bulb with a reflector (hereinafter referred to as “conventional product”) with a rated power of 65 [W] (rated voltage 110 [V]) with a beam angle of 10 degrees has a central illuminance of, for example, 6500 [cd]. ]. Therefore, as an evaluation standard, considering the demand from the market, etc., it is increased by about 10% with respect to the central illuminance of the conventional product (6500 [lx], 6500 [cd] in terms of central luminous intensity), that is, 7200 [lx] The evaluation standard was 7200 [cd]) or more in terms of central luminous intensity.

As apparent from Table 2, when the relational expression of 0.2 ≦ L _S1 / L _C1 ≦ 0.9 is satisfied, for example, L _S1 / L _C1 = (0.2, 0.3, 0.4, 0. 5, 0.6, 0.7, 0.8, 0.9), the central illuminance is 8500 [lx, which exceeds the central illuminance (6500 [lx] of the conventional product, 6500 [cd] in terms of central luminous intensity). ] (8500 [cd] in terms of central luminous intensity) or more, and the beam angle is in the range of 7.5 degrees to 12.5 degrees, and it was found that all satisfy the above-described evaluation criteria. This is apparent from the light distribution curves shown in FIGS. 19 and 20, and the illuminance at the central portion on the irradiation surface is high, and the irradiation light does not spread to the peripheral region of the central portion. On the other hand, when the relational expression L _S1 / L _C1 > 0.9 is satisfied, for example, when L _S1 / L _C1 = (1.0), the central illuminance is the central illuminance (6500 [lx], the central luminous intensity of the conventional product). Although it exceeded 6500 [cd]) in terms of conversion and satisfied the above-mentioned evaluation criteria, it was found that the beam angle was 13.0 degrees and did not satisfy the above-mentioned evaluation criteria. When the relational expression L _S1 / L _C1 <0.2 is satisfied, for example, when L _S / L _C = (0, 0.1), the beam angle is 7.5 degrees, and the above-described evaluation criteria However, it was found that the central illuminance does not satisfy the above evaluation criteria. The reason for this result is considered as follows. The relational expression L _S1 / L _C1 ≦ 0.9 is satisfied, and the coil length L _C1 of the central filament element 19 is made relatively long in an appropriate range with respect to the coil length L _S1 of the peripheral filament elements 20, 21, and 22. As a result, the coil length L _S1 of the peripheral filament elements 20, 21 and 22 that greatly contributes to the increase and decrease of the illuminance in the peripheral region of the central portion on the irradiation surface can be appropriately shortened. The coil length L _C1 of the central filament element 19 that greatly contributes to the increase / decrease in the illuminance (center illuminance) of can be made as long as possible. As a result, first, it is possible to reduce the illuminance of the peripheral area of the central portion of the irradiated surface as much as possible while leaving the contribution to the increase of the illuminance to the central portion of the irradiated surface by the peripheral filament elements 20, 21, and 22. it can. Secondly, the illuminance to the central portion of the irradiated surface can be further increased by increasing the coil length L _C1 of the central filament element 19. And it is thought that these results overlapped and the favorable light distribution curve as shown in FIG.19 and FIG.20 was obtained. However, if the relational expression of L _S1 / L _C1 <0.2 is satisfied, the coil length L _C1 of the central filament element 19 becomes long, but there are many portions that deviate from the central illuminance contribution region in the reflecting mirror 2. The relative length of the coil length L _S1 of the peripheral filament elements 20, 21, 22 relative to the coil length L _C1 of the central filament element 19 becomes too small, and the effect of installing the peripheral filament elements 20, 21, 22 is It is thought that it has decreased remarkably. On the other hand, when the relational expression L _S1 / L _C1 > 0.9 is satisfied, the coil length L _C of the central filament element 19 is sufficiently long relative to the coil length L _S1 of the peripheral filament elements 20, 21, 22. Therefore, it is considered that the peripheral filament elements 20, 21, and 22 increase the illuminance in the peripheral region of the central portion on the irradiation surface, and a desired beam angle cannot be obtained.

Therefore, when the coil length of the central filament element 19 is L _C1 [mm] and the coil length of the peripheral filament elements 20, 21, 22 is L _S1 [mm], the central filament element 19 and the peripheral filament elements 20, 21, 22 are used. In order to obtain a desired beam angle (narrow angle) and realize good light distribution characteristics while increasing the central illuminance by the contribution of both, a relational expression of 0.2 ≦ L _S1 / L _C1 ≦ 0.9 It was found that the value of (L _S1 / L _C1 ) should be 0.2 to 0.9.

As described above, according to the configuration of the halogen bulb 1 with a reflector according to the fifth embodiment of the present invention, the central illuminance is increased by the contribution of both the central filament element 19 and the peripheral filament elements 20, 21, and 22. The spread of irradiation light by the peripheral filament elements 20, 21, 22 can be suppressed, and a narrow beam angle can be obtained to realize a good light distribution characteristic.
(Embodiment 6)
Next, the illumination device according to the sixth embodiment of the present invention is used as general illumination such as a spotlight, and has a rated power of 65 according to the above-described fifth embodiment of the present invention. The halogen lamp 1 with a reflector of [W] has a configuration attached to various known lighting fixtures (not shown).

According to the configuration of the illumination device according to the sixth embodiment of the present invention, it is possible to provide an illumination device that has high central illuminance and can realize good light distribution characteristics with a narrow beam angle. .
(Embodiment 7)
Next, the illumination device according to the seventh embodiment of the present invention is used as general illumination such as a spotlight, for example, and has a rated power of 65 according to the above-described fifth embodiment of the present invention. [W] The halogen light bulb 3 used in the halogen light bulb 1 with a reflecting mirror 1 and various known bases that can be attached to the end of the halogen light bulb 3 on the sealing portion 12 side, for example, E-shaped bases (see FIG. A halogen light bulb having a configuration provided with a reflector portion provided in the illumination device.

In addition, the reflecting mirror part may be a non-replaceable one that has a reflecting surface composed of a spheroid or a paraboloid, is fixed to a lighting fixture, and can be replaced according to the intended use. It may be.
According to the configuration of the halogen bulb according to the seventh embodiment of the present invention, the central filament element 19 and the halogen bulb 1 with a reflector according to the fifth embodiment of the present invention described above and While the central illuminance is increased by the contribution of both the peripheral filament elements 20, 21, 22 and the spread of the irradiation light by the peripheral filament elements 20, 21, 22 can be suppressed, a narrow beam angle is obtained and good light distribution Characteristics can be realized.

And the illumination device which can implement | achieve a favorable light distribution characteristic with a high center illumination intensity and a narrow beam angle similarly to the illumination device which is the above-mentioned 3rd Embodiment of this invention can be provided.
In each of the above embodiments, the case where the three peripheral filament elements 20, 21, and 22 are arranged so as to form a substantially equilateral triangle has been described. In addition to this, the four peripheral filament elements are formed into a substantially square shape. When the five peripheral filament elements are arranged to form a substantially regular pentagon, the six peripheral filament elements are arranged to form a substantially regular hexagon, or more Even if it exists, the effect similar to the above can be acquired.

In each of the above embodiments, the case where the halogen light bulb 3 having a rated power of 65 [W] is used has been described. However, the present invention is not limited to this. For example, a halogen light bulb having a rated power of 20 [W] to 150 [W] is used. Even in such a case, the same effect as described above can be obtained.
In each of the above embodiments, the glass bulb 13 in the halogen bulb 3 is formed by sequentially connecting the chip-off part 10, the substantially cylindrical light emitting part 11 and the sealing part 12 to each other. As described above, but not limited to this, a chip-off part (which may not be present in some cases), a glass bulb or chip-off part in which a substantially spherical or substantially spheroid light emitting part and a sealing part are successively formed (In some cases, it may not be present), a substantially spherical or substantially spheroid light emitting part, a glass bulb formed by successively connecting a reduced diameter part and a sealing part, or a chip-off part (may be absent in some cases) Glass bulbs of various known shapes such as glass bulbs in which a light emitting portion, a reduced diameter portion, a cylindrical portion, and a sealing portion having a substantially spherical or substantially spheroidal shape are successively connected. Even with has the advantages similar to those described above.

In each of the above embodiments, the case where the halogen light bulb 3 is used has been described. However, in the case where various known incandescent light bulbs are used in place of this type of halogen light bulb 3, the same effect as described above can be obtained. It is something that can be done.
The best mode for carrying out the present invention will be described below with reference to the drawings.
(Embodiment 8)
As shown in FIG. 21, a halogen bulb 31 with a rated power of 65 [W] (rated voltage of 110 [V]) according to the eighth embodiment of the present invention includes a bulb 32 made of quartz glass or hard glass, For example, an E-shaped base 34 fixed by a known adhesive 33 is provided on a sealing portion 40 side of a bulb 32 described later.

  The bulb 32 is formed by a tip-off portion 36 that is a residual mark of sealing cut, a light-emitting portion 37 having a substantially spheroid shape, a reduced diameter portion 38, a substantially cylindrical tube portion 39, and a known pinch seal method. The sealing portions 40 are formed so as to be successively connected. Among the outer surfaces of the bulb, a visible light transmitting infrared reflecting film 41 is formed on the outer surfaces of the chip-off portion 3, the light emitting portion 37 and the reduced diameter portion 38.

The "substantially spheroid shape" as used herein includes not only the complete spheroid shape but also the case where it deviates from the complete spheroid shape due to variations in glass processing. I mean.
A filament body 42 is disposed in the light emitting portion 37, and a predetermined amount of each of a halogen substance and a rare gas or a halogen substance, a rare gas, and a nitrogen gas is sealed therein.

  For example, one end of an internal lead wire 43 made of tungsten is connected to both ends of the filament body 42. The other end portion of the internal lead wire 43 is connected to one end portion of the external lead wire 45 through a molybdenum metal foil 44 sealed in the sealing portion 40. The other end of the external lead wire 45 is led out of the valve 32 and is electrically connected to the terminal portions 35a and 35b of the base 34, respectively.

  The filament body 42 has three filament elements 46, 47, 48 as shown in FIGS. These filament elements 46, 47, and 48 are all made of tungsten, and are formed of a cylindrical single-winding coil extending linearly, and each is electrically connected in series. The wire diameter of the tungsten wire constituting the single winding coil is 0.015 [mm] to 0.100 [mm], for example 0.050 [mm].

In FIG. 22 and FIG. 23, the filament elements 46, 47 and 48 are schematically depicted as cylindrical bodies.
These three filaments elements 46, 47, 48, as shown in FIG. 23, the central axis b2, c2, d2 of the longitudinal direction thereof is substantially parallel to the central axis _{X 2} longitudinal valve 32 and a state in which the bristled so as to surround the longitudinal central axis X ₂ of the valve 32, each of the longitudinal central axis b2, c2, d2 and optionally perpendicular to the longitudinal direction of the central axis X ₂ of the valve 32 when connecting the plane P ₂ and intersects the intersection of each, they are arranged to form a substantially equilateral triangle that points on the longitudinal central axis X ₂ of the valve 32 and the center of gravity (centroid). In other words, the distance _{D 3} is substantially equal to each other, and each filament element between the two filament elements 47, 48 adjacent to the certain one filament element 46 (47 or 48) and which (46, 48 or 46, 47) The distances D ₄ between 46, 47, 48 and the central axis X _{2 in} the longitudinal direction of the bulb 32 are also substantially equal.

The “substantially parallel” and “substantially equilateral triangle” referred to here are completely equilateral triangles due to variations in assembly accuracy in the assembly process of the filament body 42 and the assembly process of the bulb 32 and the filament body 42. Is difficult to form, and in practice, the positional relationship may deviate from perfect parallelism, and the shape may deviate from perfect equilateral triangles. The same applies to the distance D ₃ and the distance D ₄ being “substantially equal”.

Such a filament body 42 is housed in one cylindrical body in which each filament element has an outer diameter (maximum outer diameter) r ₁ [mm], and this filament body is virtually combined with each filament element 46, 47, 48. It can be regarded as a single filament. In such a case, the maximum inner diameter of the portion of the bulb 32 where the filament body 42 is located is R ₂ (see FIG. 21) [mm], and the maximum outer diameter of the filament body 42 regarded as one filament is r ₁ [ mm] is set so as to satisfy the relational expression of 0.25 ≦ r ₁ / R ₂ ≦ 0.75 for the reason described later.

At that time, the maximum outer diameter r ₀ and the coil length L _S2 of the individual filament elements 46, 47, 48 are used so that the illuminance irradiated from the filament elements 46, 47, 48 to the irradiation surface is uniform. In addition, it is preferable that at least one of the maximum outer diameter r ₀ and the coil length L _S2 has the same size, and it is more preferable that all the sizes have the same size. However, the maximum outer diameter r ₀ and the coil length L _S2 may vary between the individual filament elements 46, 47, 48 due to processing variations in the manufacturing process of the filament elements.

Moreover, it is preferable that the edge on the opposite side to the sealing part 40 among the ends of each filament element 46, 47, 48 is located in substantially the same plane, respectively. Thereby, the illumination intensity to the irradiation surface irradiated by each filament element 46, 47, 48 can be made uniform, and a uniform light distribution curve can be obtained.
Here, the maximum outer diameter r ₁ is obtained by appropriately changing the distance D ₃ (or the distance D ₄ ) between two adjacent filament elements and the maximum outer diameter r ₀ of each filament element 46, 47, 48. Can be adjusted. In general, the length of the tungsten wire constituting the coil of the filament body 42 is determined according to the rated power of the halogen bulb. As an example, the length of a tungsten wire used for a halogen bulb with a rated power of 65 [W] is, for example, 420 [mm] to 480 [mm], and the length of the tungsten wire used for a halogen bulb with a rated power of 20 [W]. For example, the length of the tungsten wire of the halogen light bulb having a rated power of 100 [W] of 250 [mm] to 300 [mm] is 540 [mm] to 620 [mm]. Therefore, the maximum outer diameter r ₀ of each filament element 46, 47, 48 is appropriately changed in the coil length L _S2 of each filament element 46, 47, 48 and the coil pitch (interval between adjacent coil portions). Can be adjusted by. As an example, in the case of being used for a halogen light bulb with a rated power of 65 [W], as shown in FIGS. As configured, the coil length L _S2 is set in a range of 4.0 [mm] to 6.7 [mm]. The coil pitch is set in the range of 0.05 [mm] to 0.07 [mm].

Here, as the coil constituting the filament elements 46, 47, 48, a double-winding coil or a triple-winding coil can be used in addition to the single-winding coil.
Next, when the maximum inner diameter of the portion of the bulb 32 where the filament body 42 is located is R ₂ [mm] and the maximum outer diameter of the filament body 42 is r ₁ [mm], 0.25 ≦ r ₁ The reason why the relational expression / R ₂ ≦ 0.75 is satisfied will be described.

First, in the halogen light bulb 31 with the rated power of 65 [W], the maximum inner diameter R _{2 of the} portion of the bulb 32 where the filament body 42 is located is fixed to 12 mm, and the maximum outer diameter r ₁ of the filament body 42 is set. the [mm], was prepared which was varied as shown in Table 3 by changing the distance D ₃ between the two filaments adjacent elements appropriately by ten, respectively. Then, each manufactured product is lit at the rated power, and the number of filament bodies 42 that have been disconnected until 3500 hours of lighting has elapsed and 4000 hours of lighting has elapsed, and 4000 of the filament bodies 42 that have not been disconnected. When the number of blackened parts on the inner surface of the bulb 32 during the time lighting was examined, the results as shown in Table 3 were obtained.

  In Table 3, in the "Presence / absence of disconnection" column, the denominator indicates the total number of samples, and the numerator indicates the number of the disconnected filament bodies 42 out of the total number of samples. Also, in the “Presence or absence of blackening” column, the number of samples in which the denominator did not break out of the total number of samples, and the number of samples in which the numerator was blacked out of the number of samples in which the numerator did not break Each is shown. However, in the determination of blackening, it is determined that “blackening is present” when it can be visually confirmed that black colored substances are attached to the inner surface of the valve 32. This black colored material is one in which tungsten which is a constituent material of the filament body 42 is evaporated and adhered during lighting.

Moreover, as a lighting method, this was repeated for one cycle of lighting for 5.5 hours and turning off for 0.5 hours. The “lighting elapsed time” is an accumulated time of the lighting time.
Further, in each sample prepared, the filament elements 46, 47, and 48 are each formed of a single winding coil having the same shape and the same size, and the pitch p is 0.05 [mm] to 0.07 [mm], and the maximum outside. The diameter r ₀ is 0.65 [mm], and the coil length L _S2 is 5.4 [mm].

As apparent from Table 3, when satisfying the relational expression of 0.25 ≦ r ₁ / R ₂ ≦ 0.75, for example, r ₁ / R ₂ = (0.25, 0.35, 0.50, 0. In the case of No. 75), none of the samples had the filament body 42 disconnected before the lapse of lighting for 3500 hours, and no blackening occurred on the inner surface of the bulb 32 by the lapse of lighting for 4000 hours. In particular, when satisfying the relational expression of 0.35 ≦ r ₁ / R ₂ ≦ 0.75, for example, when r ₁ / R ₂ = (0.35, 0.50, 0.75), any sample None of the filament bodies 42 were disconnected before the lapse of lighting for 4000 hours.

On the other hand, when satisfying the relational expression of 0.25> r ₁ / R ₂ , for example, when r ₁ / R ₂ = (0.20), 8 samples out of 10 are filament bodies before the lapse of lighting for 4000 hours. 42 was disconnected, but no blackening occurred on the inner surface of the valve 32 in any of the two samples remaining without disconnection. Further, when the relational expression r ₁ / R ₂ > 0.75 is satisfied, for example, when r ₁ / R ₂ = (0.80), the filament body 42 has not been turned on until lapse of 4000 hours in all 10 samples. Although nothing was disconnected, blackening occurred on the inner surface of the valve 32 in all of the ten.

Note that the location where the wire was disconnected was near the center of the filament elements 46, 47, and 48 in all samples.
The reason for this result is considered as follows.
That is, when the relational expression of 0.25> r ₁ / R ₂ is satisfied, a gap between the bulb 32 and the filament body 42 becomes large, and a convection layer generated between the bulb 32 and the filament body 42 during lighting. Becomes thicker. As a result, the moving speed of tungsten, which is a constituent material of the filament body 42 evaporated during lighting, increases, and the amount of evaporation of tungsten increases accordingly. Therefore, it is considered that the tungsten wire (hereinafter, simply referred to as “tungsten wire”) of the coil constituting the filament body 42 is thinned by evaporation of the tungsten, resulting in disconnection. On the other hand, when the relational expression r ₁ / R ₂ > 0.75 is satisfied, the gap between the bulb 32 and the filament body 42 is reduced, but the bulb 32 is too close to the filament body 42 and the bulb is turned on. The temperature of becomes considerably high. On the contrary, the temperature of the filament body 42 is abnormally increased by the radiant heat from the bulb 32 that has become high temperature, and the evaporation of tungsten, which is a constituent material of the filament body 42, is promoted. It is thought that it has adhered. However, even in the latter case, a phenomenon that the tungsten wire is thinned by evaporation of tungsten was observed, but the wire was not broken. This is considered to be because the convection layer is thinner in the latter case and the evaporation rate of tungsten is slower than in the former case. In this experiment, the valve 32 was not damaged, but when the inner surface of the valve 32 is blackened as described above, heat is easily absorbed. There is a risk of damage.

On the other hand, when the relational expression of 0.25 ≦ r ₁ / R ₂ ≦ 0.75 is satisfied, the gap between the valve 32 and the filament body 42 is reasonably small. This is probably because the convection layer generated between them became extremely thin, and as a result, the moving speed of tungsten evaporated during lighting became slow, and the evaporation amount of tungsten was correspondingly reduced accordingly. Moreover, since the bulb 32 is not too close to the filament body 42, the temperature of the bulb 32 does not become excessively high during lighting, and therefore the temperature of the filament body 42 does not rise abnormally. It is thought that.

Therefore, when the maximum inner diameter of the portion of the bulb 32 where the filament body 42 is located is R ₂ [mm] and the maximum outer diameter of the filament body 42 is r ₁ [mm], the inner surface of the bulb 32 is blackened. It was found that the relational expression 0.25 ≦ r ₁ / R ₂ ≦ 0.75 should be satisfied in order to prevent disconnection of the filament body 42 and extend the life while preventing the filament body 42 from being broken. In particular, it has been found that the relational expression of 0.35 ≦ r ₁ / R ₂ ≦ 0.75 should be satisfied in order to further extend the life.

  As described above, according to the configuration of the halogen bulb 31 according to the eighth embodiment of the present invention, the convection layer generated between the bulb 32 and the filament body 42 can be made extremely thin. The amount of evaporation of tungsten, which is a constituent material, can be remarkably reduced. As a result, it is possible to prevent the tungsten wire of the coil constituting the filament body 42 from being thinned and disconnected, thereby extending the life. . In addition, since the gap between the bulb 32 and the filament body 42 is kept moderate, both the bulb 32 and the filament body 42 can be prevented from becoming abnormally hot during lighting. Can be prevented from being damaged, or the inner surface of the bulb 32 from being blackened due to excessive evaporation of tungsten, which is a constituent material of the filament body 42.

  In the eighth embodiment, the case where the three filament elements 46, 47, and 48 are arranged so as to form a substantially equilateral triangle has been described. In addition to this, four filament elements are formed into a substantially square shape. In the case where the five filament elements are arranged so as to form a substantially regular pentagon, the case where the six filament elements are arranged so as to form a substantially regular hexagon, or more. Can obtain the same effects as described above. Of course, if necessary, another filament element may be provided in the space surrounded by the filament elements, for example, the same shape, the same size, or a different shape, or a different size of the filament element. Even when the filament body arranged so as to be substantially positioned on the central axis X in the direction is used, the same effect as described above can be obtained.

  Further, in the eighth embodiment, as the shape of the bulb 32, the tip-off part 36, the light-emitting part 37 having a substantially spheroid shape, the reduced diameter part 38, the cylindrical part 39 and the sealing part 40 are successively formed. However, the present invention is not limited to this, and the chip-off part (may be omitted in some cases), the light-emitting part having a substantially spheroid shape, the reduced diameter part, and the sealing part are successively formed. Valve, chip-off part (may not be present in some cases), valve formed by a light-emitting part and sealing part having a substantially spheroidal shape in sequence, or chip-off part (may not be present in some cases) The same effect as described above can be obtained even when a well-known various shape bulb such as a bulb in which a substantially cylindrical light emitting portion and a sealing portion are successively formed is used. Of course, instead of the above-described substantially spheroidal shape, a light emitting portion having a substantially spherical shape or a substantially composite ellipsoidal shape can also be used.

Further, in the eighth embodiment, the tungsten wire is wound so that it has a cylindrical shape, that is, the outer shape of the cross section cut perpendicularly to the central axes b2, c2, d2 in the longitudinal direction draws a circle. The case where the filament elements 46, 47, and 48 formed of the single-wound coil are used has been described. However, the present invention is not particularly limited to the outer shape, and for example, as shown in FIG. 24, the outer shape of the cross section cut perpendicularly to the central axes b2, c2, d2 in the longitudinal direction is an ellipse. In the case where filament elements 49, 50, 51 composed of coils wound so as to draw are used, the same effect as described above can be obtained. Also in the example shown in FIG. 24, each filament element 49, 50 and 51 are centered on the point on the longitudinal central axis _{X 2} of the valve 32, and the diameter of a circle circumscribing the filament element 49, 50, 51 it can be accommodated in a cylindrical body to the maximum outer diameter r _1. The maximum outer diameter r ₁ can also be determined in this manner even in the filament body 52 composed of the filament elements 49, 50, 51 having the outer shape as shown in FIG.
(Embodiment 9)
Next, as shown in FIG. 25, a halogen bulb 53 with a rated power of 65 [W] (rated voltage 110 [V]) according to the ninth embodiment of the present invention is mainly used for general illumination such as a spotlight. Is incorporated in the reflecting mirror portion 55 of a known illumination device 54 used as a valve 56 made of quartz glass, hard glass, or the like, and a known portion on the sealing portion 66 side described later of the bulb 56. For example, an E-shaped base (not shown) fixed by an adhesive (not shown) is provided.

It is substantially positioned on the same axis to the central longitudinal axis X ₃ of the valve 56 of the halogen lamp 53 and the optical axis Y ₃ of the reflection mirror portion 55.
The illuminating device 54 is a cylindrical illumination in which light is irradiated from the opening 57 on the front surface, and a receiving tool (not shown) to which the reflector 55 and the base of the halogen bulb 53 are attached is housed. An instrument 58 is included.

In the reflecting mirror 55, a front glass 60 is attached to the opening 59 on the front surface, and a reflecting surface 61 of a rotating body made of a spheroid or paraboloid is formed on the inner surface. The reflecting surface 61 may be faceted as necessary.
The bulb 56 is formed by a chip-off portion 62 which is a residual mark of sealing cut, a light-emitting portion 63 having a substantially spheroidal shape, a reduced diameter portion 64, a substantially cylindrical tube portion 65, and a known pinch seal method. The sealing portions 66 are formed so as to be successively connected. A visible light transmitting infrared reflection film 67 is formed on the outer surface of the bulb 56 on the outer surface of the light emitting portion 63 and the reduced diameter portion 64.

The "substantially spheroid shape" as used herein includes not only the complete spheroid shape but also the case where it deviates from the complete spheroid shape due to variations in glass processing. I mean.
A filament body 68 is disposed in the light emitting portion 63, and a predetermined amount of a halogen substance and a rare gas, or a halogen material, a rare gas, and a nitrogen gas are sealed therein.

  For example, one end of an internal lead wire 69 made of tungsten is connected to both ends of the filament body 68. The other end portion of the internal lead wire 69 is connected to one end portion of an external lead wire (not shown) via a molybdenum metal foil (not shown) sealed in the sealing portion 66. The other end portion of the external lead wire is led out of the bulb 56 and is electrically connected to the terminal portion of the base.

  As shown in FIGS. 26 and 27, the filament body 68 includes one central filament element 70 and three peripheral filament elements 71, 72, 73. Each of the central filament element 70 and the peripheral filament elements 71, 72, 73 is made of tungsten, and is composed of a single-winding coil extending linearly in a cylindrical shape, and each is electrically connected in series. The wire diameter of the tungsten wire constituting the single winding coil is 0.015 [mm] to 0.100 [mm], for example 0.050 [mm].

In FIGS. 26 and 27, the central filament element 70 and the peripheral filament elements 71, 72, and 73 are schematically depicted as cylindrical bodies.
Central filament element 70, when this halogen lamp 53 is incorporated into the reflector 55 of the lighting device 54, the longitudinal central axis a3 is substantially located on the optical axis Y ₃ of the reflection mirror portion 55. Specifically, the central filament element 70, the longitudinal central axis a3 is arranged so as to be substantially located on the longitudinal central axis X ₃ of the valve 56. Then, when the halogen lamp 53 is incorporated in the reflector part 55, since the longitudinal central axis X ₃ of the valve 56 is substantially located on the optical axis Y ₃ of the reflection mirror portion 55, resulting in the central filament element longitudinal central axis a3 70 comes to substantially positioned on the optical axis Y ₃ of the reflection mirror portion 55.

Here, the "substantially position", ideally it is preferable that the central axis a3 is located entirely on the longitudinal central axis X ₃ of the valve 56, the alignment accuracy in the manufacturing process practically the variation of the deviation from the central axis a3 is the central axis X _3, there is a case where consequently also deviated from the optical axis Y _3, is meant to include also the case. Of course, the central axis a3 depending on the type of lighting device may deviate from the optical axis Y _3, is meant to include also the case incorporated.

The peripheral filament elements 71, 72, 73 are arranged around the central filament element 70 so that the longitudinal central axes b 3, c 3, d 3 are substantially parallel to the longitudinal central axis a 3 of the central filament element 70. ing. Further, as shown in FIG. 27, these three peripheral filament elements 71, 72, 73 are perpendicular to the longitudinal center axes b3, c3, d3 and the longitudinal center axis a3 of the center filament element 70, respectively. when connecting such arbitrary plane P ₃ and intersect the intersection, respectively, it is arranged a point on the longitudinal center axis a3 of the central filament element so as to form a substantially equilateral triangle and the center of gravity (centroid). In other words, two peripheral distance _{D 5} is adjacent all substantially equal, and as a peripheral filament element 71 is (72 or 73) and which between the central filament element 70 and each of the peripheral filaments elements 71, 72, 73 The distances D ₆ between the filament elements 72 and 73 (71, 73 or 71, 72) are substantially equal.

The “substantially parallel” and “substantially equilateral triangle” referred to here are perfectly equilateral triangles due to variations in assembly accuracy in the assembly process of the filament body 68 and the assembly process of the valve 56 and the filament body 68. Is difficult to form, and in practice, the positional relationship may deviate from perfect parallelism, and the shape may deviate from perfect equilateral triangles. The same applies to the distance D ₅ and the distance D ₆ being “substantially equal”.

The central filament element 70 includes a position of the focal point F ₂ of the rotating body which forms the reflection surface 61 as shown in FIG. 26, and the center point A ₃ located on the central axis a3 of the central filament element 70 It is arranged so as to be opposite to the opening 59 for emitting light in the reflection mirror portion 55 than the position of the focal point F _2. Further, the peripheral filament elements 71, 72, 73 follow this, and each of the peripheral filament elements 71, 72, 73 is a point F _b3 , F _c3 , F _d3 (described later in FIG. Center points B ₃ , C ₃ , D ₃ (FIG. 26) including the positions of the points F _b3 , F _c3 ) and on the central axes b ₃ , c ₃ , d _{3 of the} peripheral filament elements 71, 72, 73. Then, only the points B ₃ and C ₃ are illustrated) are arranged so as to be located on the opposite side of the opening 59 from the positions of the points F _b3 , F _c3 and F _d3 . However, the points F _b3 , F _c3 , and F _d3 include a plane Q ₃ that includes the position of the focal point F ₂ of the rotating body that forms the reflecting surface 61 and that intersects the optical axis Y ₃ of the reflecting mirror portion 55 perpendicularly. And the intersections of the central axes b3, c3 and d3. As an example, the distance between the focal point F ₂ and the center point A ₃ is 2.35 [mm], and the distance between the points F _b3 , F _c3 , F _d3 and the center points B ₃ , C ₃ , D ₃ is Each distance is 1.21 [mm]. Thus the central filament element 70 and the peripheral filaments elements 71, 72, 73, the center point _B 3 of the center point _{A 3} and the peripheral filaments elements 71, 72, 73 of the central filament element _70, C 3, _{D 3} is the reflector relative to the focal F ₂ of the reflecting surface 61 of the part 55, the opening 59 comprises by arranging so as to be positioned on the opposite side, regions which contribute to the central illuminance at the reflecting mirror portion 55, i.e., the focal point F ₂ The density of the filament body 68 in the vicinity region (hereinafter simply referred to as “central illuminance contribution region”) can be increased, and the central illuminance can be increased.

Such a filament body 68 is accommodated in one cylindrical body in which the central filament element 70 and the peripheral filament elements 71, 72, 73 have an outer diameter (maximum outer diameter) r ₃ [mm]. The central filament element 70 and the peripheral filament elements 71, 72, 73 can be regarded as a single filament. In such a case, the maximum inner diameter of the portion of the bulb 56 where the filament body 68 is located is R ₃ (see FIG. 25) [mm], and the maximum outer diameter of the filament body 68 regarded as one filament is r ₃ [ mm], in order to prevent the inner surface of the bulb 56 from being blackened, to prevent the filament body 68 from being disconnected and to prolong the service life, 0.25 ≦ r ₃ / R ₃ ≦ 0.75. Is set to satisfy the following relational expression. In particular, in order to further extend the life, it is preferable to set so as to satisfy the relational expression of 0.35 ≦ r ₃ / R ₃ ≦ 0.75.

That is, when the relational expression of 0.25 ≦ r ₃ / R ₃ ≦ 0.75 is satisfied, the gap between the valve 56 and the filament body 68 is reasonably small, and thus occurs between the valve 56 and the filament body 68. The convection layer can be made extremely thin. As a result, it is a constituent material of the filament body 68, and the moving speed of tungsten evaporated during lighting can be slowed, and the evaporation amount of tungsten can be significantly reduced accordingly. Therefore, it is possible to prevent the tungsten wire of the coil to be thinned due to the evaporation of the tungsten and to break the wire, thereby extending the life. Moreover, since the bulb 56 is not too close to the filament body 68, the temperature of the filament body 68 does not rise excessively with the abnormal rise in the temperature of the bulb 56 during lighting. The evaporation amount of tungsten which is a constituent material of the filament body 68 is promoted, and the evaporated tungsten can be prevented from adhering to the inner surface of the bulb 56 and blackening. On the other hand, when the relational expression of 0.25> r ₃ / R ₃ is satisfied, the gap between the bulb 56 and the filament body 68 becomes large, and the convection layer generated between the bulb 56 and the filament body 68 during lighting. Becomes thicker. As a result, the moving speed of tungsten, which is a constituent material of the filament body 68 that has evaporated during lighting, increases, and the amount of tungsten evaporation increases accordingly, and the tungsten wire of the coil that forms the filament body 68 evaporates this tungsten. It becomes thin and leads to disconnection. When the relational expression r ₃ / R ₃ > 0.75 is satisfied, the gap between the bulb 56 and the filament body 68 is small, but the bulb 56 is too close to the filament body 68 and is turned on. The temperature becomes very high. On the other hand, the temperature of the filament body 68 is excessively increased by the radiant heat from the bulb 56 that has become high temperature, and the evaporation of tungsten, which is a constituent material of the filament body 68, is promoted. Will adhere to the surface and cause blackening. In some cases, blackening of the inner surface of the valve 56 may further increase the temperature of the valve 56 and cause the valve 56 to be damaged.

The maximum outer diameter r ₃ appropriately changes the distance D ₆ (or the distance D ₅ ) between two adjacent filament elements and the maximum outer diameter r ₀ of the central filament element 70 and the peripheral filament elements 71, 72, 73. Can be adjusted. Further, the maximum outer diameter r ₀ of the central filament element 70 and the peripheral filament elements 71, 72, 73 is equal to the coil length L _C3 of the central filament element 70, the coil length L _S3 of the peripheral filament elements 71, 72, 73, It can be adjusted by appropriately changing the pitch.

Here, the coil length L _C3 of the central filament element 70 and the coil length L _S3 of the peripheral filament elements 71, 72, 73 may all be the same length. At that time, for example, in the case of a halogen bulb with a rated power of 65 [W], the coil length L _C3 and the coil length L _S3 are set within a range of 3.0 [mm] to 5.0 [mm]. Is preferred. Further, although the coil lengths L _S3 of the peripheral filament elements 71, 72, 73 are all the same, the coil length L _C3 and the coil length L _S3 may be different. In that case, for example, in the case of a halogen lamp with a rated power of 65 [W], the coil length L _C3 is in the range of 3.5 [mm] to 15.0 [mm], and the coil length L _S3 is 1.5 [mm]. It is preferable that each is set within a range of [mm] to 4.5 [mm]. Furthermore, unlike the coil length _{L C3} and the coil length _{L S3,} and may be a coil length _{L S3} of each of the peripheral filaments elements 71, 72, 73 also different. In that case, for example, in the case of a halogen bulb with a rated power of 65 [W], the coil length L _C3 is set within the range of 3.5 [mm] to 15.0 [mm], and the coil length L _S3 is all It is preferable to set different values within a range of 1.5 [mm] to 4.5 [mm]. The pitch of the single winding coil is set in a range of 0.05 [mm] to 0.07 [mm] in any of the central filament element 70 and the peripheral filament elements 71, 72, and 73.

However, in the case where the relational expression 0.25 ≦ r ₃ / R ₃ ≦ 0.75 is satisfied, the maximum outer diameter r ₀ and the coil length L _S3 of each peripheral filament element 71, 72, 73 are determined by each peripheral filament element. From the viewpoint of making the illuminance irradiated onto the irradiation surface uniform from 71, 72, 73, at least one of the maximum outer diameter r ₀ and the coil length L _S3 may be made the same size. Preferably, all dimensions are the same. However, the maximum outer diameter r ₀ and the coil length L _S3 may vary between the individual peripheral filament elements 71, 72, 73 due to processing variations in the manufacturing process of the peripheral filament elements 71, 72, 73.

Of the ends of the filament elements 70, 71, 72, 73, the ends on the opening 59 side are preferably located in substantially the same plane. Thereby, the illumination intensity to the irradiation surface irradiated by each filament element 70, 71, 72, 73 can be made uniform, and a uniform light distribution curve can be obtained.
Furthermore, the coil length L _C3 [mm] of the central filament element 70 and the coil length L _S3 [mm] of the peripheral filament elements 71, 72, 73 are the same for both the central filament element 70 and the peripheral filament elements 71, 72, 73. While increasing the central illuminance by contribution, a desired beam angle (narrow angle, for example, 10 degrees and its allowable range is 7.5 degrees to 12.5 degrees) is obtained, and a good light distribution characteristic is realized. Therefore, it is preferable to satisfy the relational expression 0.2 ≦ L _S3 / L _C3 ≦ 0.9. However, in this case, the coil lengths L _S3 of the peripheral filament elements 71, 72, 73 are substantially equal. Of course, “substantially equal” means that each coil length L _S3 varies due to variations in the coil manufacturing process as described above.

That is, when the relational expression L _S3 / L _C3 ≦ 0.9 is satisfied, the coil length L _C3 of the central filament element 70 is relatively relative to the coil length L _S3 of the peripheral filament elements 71, 72, 73. The coil length L _S3 of the peripheral filament elements 71, 72, and 73 that greatly contributes to the increase and decrease of the illuminance in the peripheral area of the central portion on the irradiation surface can be appropriately shortened. The coil length L _C3 of the central filament element 70 that greatly contributes to increase / decrease in the illuminance (center illuminance) of the central portion of the surface can be made as long as possible. As a result, first, it is possible to reduce the illuminance of the peripheral area of the central portion of the irradiation surface as much as possible while leaving the contribution to the increase of the illuminance to the central portion of the irradiation surface by the peripheral filament elements 71, 72, 73. it can. Second, the illuminance to the central portion of the irradiated surface can be further increased by increasing the coil length L _C3 of the central filament element 70. And these results overlap and a favorable light distribution curve can be obtained. However, if the relational expression L _S3 / L _C3 <0.2 is satisfied, the coil length L _C3 of the central filament element 70 becomes long, but there are many portions that deviate from the central illuminance contribution region in the reflector 55. In addition, the relative length of the coil length L _S3 of the peripheral filament elements 71, 72, 73 with respect to the coil length L _C3 of the central filament element 70 is too small, and the peripheral filament elements 71, 72, 73 are installed. The effect will be significantly reduced. When the relational expression L _S3 / L _C3 > 0.9 is satisfied, the coil length L _C3 of the central filament element 70 is relatively sufficiently longer than the coil length L _S3 of the peripheral filament elements 71, 72, 73. Therefore, in other words, when the relational expression L _S3 / L _C3 ≦ 0.9 is satisfied, the relational expression that the coil length L _S3 of the peripheral filament elements 71, 72, 73 is L _S3 / L _C3 ≦ 0.9 is obtained. Since it becomes longer than the case of satisfying, the peripheral filament elements 71, 72, 73 increase the illuminance in the peripheral region of the central portion on the irradiation surface, and a desired beam angle, particularly a narrow beam angle (for example, 10 degrees). In this case, the allowable range is 7.5 degrees to 12.5 degrees).

Further, in this case, the distance _{D 5} between the central filament element 70 and each of the peripheral filaments elements 71, 72, is set in a range of each 0.1 [mm] ~2.2 [mm] Preferably it is. Thereby, the density of the filament body 68 in the central illuminance contribution region can be further increased, the central illuminance can be extremely increased, and the central filament element 70 and the peripheral filament elements 71, 72, 73 are It is possible to prevent arc discharge from occurring between the central filament element 70 and the peripheral filament elements 71, 72, 73 due to the arc discharge. On the other hand, when the distance _{D 5} is smaller than 0.1 [mm], during lighting, the arc discharge is generated between the central filament element 70 and the peripheral filaments elements 71, 72, 73, the central filament element 70 by the arc discharge Or the peripheral filament elements 71, 72, 73 may be broken. The distance when the D ₅ is greater than 2.2 [mm], the smaller the density of the filament assembly 68 in the central illuminance contributing area, or no longer be able to increase the center illuminance very well, near the filament element 71, There is a possibility that the illuminance of the peripheral area of the central portion on the irradiation surface may increase due to 72 and 73.

  Here, as the coils constituting the filament elements 70, 71, 72, 73, a double-winding coil or a triple-winding coil can be used in addition to the single-winding coil. However, when this halogen bulb 53 is used by being incorporated in the reflecting mirror portion 55 of the illumination device 54, from the viewpoint of increasing the central illuminance of the irradiated surface, the coil is more coiled than a double-winding coil or a triple-winding coil. Of the filament body 68 in the central illuminance contribution region (the region contributing to the central illuminance in the reflector portion 55, that is, in the vicinity region including the focal position in the reflector portion 55). It is preferable to use a single-winding coil capable of increasing the density.

  As described above, according to the configuration of the halogen bulb 53 according to the ninth embodiment of the present invention, between the bulb 56 and the filament body 68, similarly to the halogen bulb according to the eighth embodiment of the present invention. Since the generated convection layer can be made extremely thin, the amount of evaporation of tungsten, which is a constituent material of the filament body 68, can be significantly reduced. As a result, the tungsten wire of the coil constituting the filament body 68 is thinned and disconnected. Can be prevented, and the life can be extended. In addition, since the gap between the bulb 56 and the filament body 68 is kept moderate, it is possible to prevent both the bulb 56 and the filament body 68 from becoming abnormally hot during lighting. Can be prevented from being damaged, or the inner surface of the bulb 56 from being blackened due to excessive evaporation of the filament body 68.

In particular, when the coil length of the central filament element 70 is L _C3 [mm] and the coil lengths of the peripheral filament elements 71, 72, 73 are L _S3 [mm], 0.2 ≦ L _S3 / L _C3 ≦ 0.9 By satisfying the following relational expression, the center illuminance is increased by the contribution of both the central filament element 70 and the peripheral filament elements 71, 72, 73 in the state of being incorporated in the reflecting mirror portion 55 of the lighting device 54, while the peripheral illuminance is increased. The spread of irradiation light by the filament elements 71, 72, 73 can be suppressed, and a good light distribution characteristic can be realized by obtaining a narrow beam angle.

In particular, the distance D ₅ between the central filament element 70 and each of the peripheral filament elements 71, 72, 73 is set to a range of 0.1 [mm] to 2.2 [mm], respectively. The density of the filament body 68 in the central illuminance contribution region can be further increased, the central illuminance can be extremely increased, and between the central filament element 70 and the peripheral filament elements 71, 72, 73 during lighting. It is possible to prevent arc discharge from occurring and disconnection of the central filament element 70 and the peripheral filament elements 71, 72, 73 due to the arc discharge.

  In the ninth embodiment, the case where the three peripheral filament elements 71, 72, 73 are arranged so as to form a substantially equilateral triangle has been described. In addition, the four peripheral filament elements are substantially square. Or 5 peripheral filament elements arranged to form a substantially regular pentagon, 6 peripheral filament elements arranged to form a substantially regular hexagon, or more Even if it is a case, the effect similar to the above can be acquired.

  Further, in the ninth embodiment, the tip-off portion 62, the substantially spheroidal light emitting portion 63, the reduced diameter portion 64, the cylindrical portion 65, and the sealing portion 66 are sequentially formed as the bulb shape. However, the present invention is not limited to this, and a chip-off portion (may be omitted in some cases), a light-emitting portion having a substantially spheroidal shape, a reduced diameter portion, and a sealing portion are sequentially formed. Bulb, chip-off part (may not be present in some cases), bulb formed by a light-emitting part and sealing part having a substantially spheroid shape in sequence, or chip-off part (may be absent in some cases) ), Even when a well-known various shape bulb such as a bulb in which a substantially cylindrical light emitting portion and a sealing portion are successively formed is used, the same effect as described above can be obtained. Of course, instead of the above-described substantially spheroidal shape, a light emitting portion having a substantially spherical shape or a substantially composite ellipsoidal shape can also be used.

Furthermore, in the ninth embodiment, the outer shape of the cross section cut in a direction perpendicular to the central axes a3, b3, c3, d3 in the longitudinal direction so as to form a circular shape so that the tungsten wire has a cylindrical shape. The case where the filament elements 70, 71, 72, 73 made of the single-winding coil wound on is used has been described. However, the present invention is not particularly limited to the outer shape, and for example, as shown in FIG. 28, the outer shape of the cross section cut perpendicular to the central axes a3, b3, c3, and d3 in the longitudinal direction. Even when filament elements 74, 75, 76, 77 made of coils wound so as to draw an ellipse are used, the same effect as described above can be obtained. Also in the example shown in FIG. 28, each filament element 74, 75, 76, 77 is a circle that is centered on a point on the central axis X _{3 in} the longitudinal direction of the bulb 56 and circumscribes each filament element 75, 76, 77. it can be accommodated in a cylindrical body to the maximum outer diameter r ₃ of the diameter. The maximum outer diameter r ₃ can also be determined in this way even in the filament body 78 composed of the filament elements 74, 75, 76, 77 having the outer shape as shown in FIG.
(Embodiment 10)
Next, as shown in FIG. 29, the reflecting mirror with halogen bulb 79 rated power 65 is the tenth embodiment of the present invention [W] (rated voltage 110 [V]), the mirror diameter phi ₂ is 35 A concave reflecting mirror 80 of [mm] to 100 [mm], for example, 50 [mm], and a rated power of 65 [W] according to the fifth embodiment of the present invention disposed inside the reflecting mirror 80 A halogen bulb 31 (with a rated voltage of 110 [V]) (excluding the base 34) and, for example, an E-shaped base 81 attached to the end of the reflecting mirror 80 are provided.

The central axis X _{4 in} the longitudinal direction of the bulb 32 of the halogen bulb 31 substantially coincides with the optical axis Y ₄ of the reflecting mirror 49.
The reflecting mirror 80 is made of hard glass, quartz glass, or the like, and has an opening 82 for irradiating light at one end and a cylindrical neck 83 at the other end, and a spheroidal surface or a paraboloid on the inner surface. A reflecting surface 84 of a rotating body composed of a surface or the like is formed. You may form a facet in the reflective surface 84 as needed.

The opening 82 is provided with a front glass 85 and is fixed by a known stopper 86. As a method for fixing the front glass 85, a known adhesive (not shown) may be used instead of the stopper 86, or the stopper 86 and the adhesive may be used in combination. However, the front glass 85 is not necessarily provided.
A base 81 is provided outside the neck portion 83 so as to cover almost the entire neck portion 83, and is fixed thereto with an adhesive 87. On the other hand, the sealing portion 40 of the halogen light bulb 31 is inserted into the neck portion 83, and is similarly fixed through an adhesive 87.

In addition to a metal film such as aluminum or chromium, a multilayer interference film made of silicon dioxide (SiO ₂ ), titanium dioxide (TiO ₂ ), magnesium fluoride (MgF), zinc sulfide (ZnS), or the like is formed on the reflecting surface 84. Has been.
As described above, according to the configuration of the halogen light bulb 79 with a reflector according to the tenth embodiment of the present invention, the bulb 32, the filament body 42, and the like, similar to the halogen light bulb according to the eighth embodiment of the present invention. , The evaporation amount of tungsten, which is a constituent material of the filament body 42, can be significantly reduced. As a result, the tungsten wire of the coil constituting the filament body 42 can be reduced. Thinning and disconnection can be prevented, and the life can be extended. In addition, since the gap between the bulb 32 and the filament body 42 is kept moderate, it is possible to suppress both the bulb 32 and the filament body 42 from becoming abnormally hot during lighting. Can be prevented from being damaged, or the inner surface of the bulb 32 from being blackened due to excessive evaporation of the filament body 42.

In the tenth embodiment, the case where the three filament elements 46, 47, and 48 are arranged so as to form a substantially equilateral triangle has been described. In addition to this, four filament elements are formed into a substantially square shape. In the case where the five filament elements are arranged so as to form a substantially regular pentagon, the case where the six filament elements are arranged so as to form a substantially regular hexagon, or more. Can obtain the same effects as described above. Of course, if necessary, another filament element in the space surrounded by each filament element, for example, the same shape, the same size, or a different shape, or a different size of the filament element in the longitudinal direction of the valve 2 it can be on the center axis X ₄ of obtaining the same effect as described above even when a placement is allowed filament body so as to be substantially located.

  Further, in the tenth embodiment, as the shape of the bulb 32, the tip-off part 36, the light-emitting part 37 having a substantially spheroid shape, the reduced diameter part 38, the cylindrical part 39 and the sealing part 40 are successively formed. However, the present invention is not limited to this, and the chip-off part (may be omitted in some cases), the light-emitting part having a substantially spheroid shape, the reduced diameter part, and the sealing part are successively formed. Valve, chip-off part (may not be present in some cases), valve formed by a light-emitting part and sealing part having a substantially spheroidal shape in sequence, or chip-off part (may not be present in some cases) The same effect as described above can be obtained even when a well-known various shape bulb such as a bulb in which a substantially cylindrical light emitting portion and a sealing portion are successively formed is used. Of course, instead of the above-described substantially spheroidal shape, a light emitting portion having a substantially spherical shape or a substantially composite ellipsoidal shape can also be used.

Further, also in the tenth embodiment, the tungsten wire is wound so as to form a cylindrical shape, that is, the outer shape of the cross section cut perpendicularly to the central axes b3, c3, d3 in the longitudinal direction draws a circle. The case where the filament elements 46, 47, and 48 made of the single-wound coil are used has been described. However, the present invention is not particularly limited to the outer shape, and for example, as shown in FIG. 24, the outer shape of the cross section cut perpendicularly to the central axes b3, c3, d3 in the longitudinal direction is an ellipse. In the case where filament elements 49, 50, 51 composed of coils wound so as to draw are used, the same effect as described above can be obtained.
(Embodiment 11)
Next, as shown in FIG. 30, the halogen lamp 88 with a reflector having a rated power of 65 [W] (rated voltage 110 [V]) according to the eleventh embodiment of the present invention has a mirror diameter φ ₃ of 35. A concave reflecting mirror 89 of [mm] to 100 [mm], for example, 50 [mm], a halogen light bulb 90 disposed inside the reflecting mirror 89, and, for example, E attached to the end of the reflecting mirror 89 And a base 91 having a shape.

A central axis X _{5 in} the longitudinal direction of the bulb 101 described later of the halogen bulb 90 substantially coincides with the optical axis Y ₅ of the reflecting mirror 89.
The reflecting mirror 89 is made of hard glass or quartz glass, and has an opening 93 for irradiating light at one end and a cylindrical neck 94 at the other end, and a spheroidal surface or a paraboloid on the inner surface. A reflecting surface 95 of the rotating body made of a surface or the like is formed. You may form a facet in the reflective surface 95 as needed.

The opening 93 is provided with a front glass 96 and is fixed by a known fastener (not shown), a known adhesive (not shown), or a combination thereof. However, the front glass 96 is not necessarily provided.
A base 91 is provided on the outer side of the neck portion 94 so as to cover almost half of the neck portion 94, and is fixed with an adhesive 97. On the other hand, a sealing portion 100 described later of the halogen light bulb 90 is inserted into the neck portion 94, and is similarly fixed through an adhesive 97.

In addition to a metal film such as aluminum or chromium, a multilayer interference film made of silicon dioxide (SiO ₂ ), titanium dioxide (TiO ₂ ), magnesium fluoride (MgF), zinc sulfide (ZnS) or the like is formed on the reflecting surface 95. Has been.
The halogen light bulb 90 is a quartz glass in which a chip-off portion 98 that is a residual mark of sealing cut, a substantially cylindrical light emitting portion 99, and a sealing portion 100 formed by a known pinch seal method are successively connected. And a bulb 101 made of hard glass or the like. A visible light transmitting infrared reflecting film may be formed on the outer surface of the bulb 101 as necessary.

The “substantially cylindrical shape” mentioned here means not only the case of a perfect cylindrical shape but also the case of deviation from the perfect cylindrical shape due to variations in processing of glass.
A filament body 102 is provided in the light emitting unit 99, and a predetermined amount of a halogen substance and a rare gas, or a halogen material, a rare gas, and a nitrogen gas are sealed therein.

  For example, one end of an internal lead wire 103 made of tungsten is connected to both ends of the filament body 102. The other end portion of the internal lead wire 103 is connected to one end portion of the external lead wire 105 through a metal foil 104 made of molybdenum sealed in the sealing portion 100. The other end portion of the external lead wire 105 is led out of the valve 101 and is electrically connected to the terminal portions 92a and 92b of the base 91, respectively.

In the present embodiment, the configuration of the filament body 102 is the same as that of the filament body 68 in the sixth embodiment, and therefore the filament body 102 will be described with reference to FIGS. 26 and 27.
As shown in FIGS. 26 and 27, the filament body 102 includes one central filament element 106 and three peripheral filament elements 107, 108, and 109. The central filament element 106 and the peripheral filament elements 107, 108, and 109 are all made of tungsten, and are formed of a cylindrical single-winding coil extending linearly, and are electrically connected in series. . The wire diameter of the tungsten wire constituting the single winding coil is 0.015 [mm] to 0.100 [mm], for example, 0.050 [mm].

The central filament element 106 has a longitudinal central axis a <b> ₅ substantially positioned on the optical axis Y <b> 5 of the reflecting mirror 89.
Here, the "are substantially position", ideally it is preferable that the central axis a5 are located entirely on the optical axis Y ₅ of the reflector 89, the alignment accuracy in the manufacturing process practical due to variations, there are cases where the center axis a5 deviates from the optical axis Y ₅ of the reflector 89, is meant to include also the case.

The peripheral filament elements 107, 108 and 109 are arranged around the central filament element 106 so that the longitudinal center axes b 5, c 5 and d 5 are substantially parallel to the longitudinal center axis a 5 of the central filament element 106. ing. Further, as shown in FIG. 27, these three peripheral filament elements 107, 108, 109 are perpendicular to the respective longitudinal center axes b 5, c 5, d 5 and the longitudinal center axis a 5 of the center filament element 106. when connecting such arbitrary plane P ₅ and intersects the intersection of each of which is arranged a point on the longitudinal center axis a5 of the central filament element so as to form a substantially equilateral triangle and the center of gravity (centroid). That is, the distances D ₇ between the central filament element 106 and the respective peripheral filament elements 107, 108, 109 are all substantially equal, and one peripheral filament element 107 (108 or 109) is adjacent to the two peripheral areas. The distances D ₈ between the filament elements 108 and 109 (107, 108 or 107, 109) are substantially equal.

The “substantially parallel” and “substantially equilateral triangle” referred to here are completely parallel due to variations in assembly accuracy in the assembly process of the filament body 102, and it is difficult to form a perfect equilateral triangle. In some cases, the positional relationship may deviate from parallel, and the shape may deviate from a perfect equilateral triangle. The same applies to the distance D ₇ and the distance D ₈ being “substantially equal”.

The central filament element 106 includes a position of the rotator focus F ₅ of which forms the reflecting surface 95 as shown in FIG. 26, and the center point A ₅ in on the central axis a5 of the central filament element 106 It is arranged so as to be opposite to the opening 93 than the position of the focal point F _5. The peripheral filament elements 107, 108, and 109 are also based on this, and the respective peripheral filament elements 107, 108, and 109 are points F _b5 , F _c5 , and F _d5 (described later in FIG. 26) in the reflector 89, respectively. Center points B ₅ , C ₅ , D ₅ (shown in FIG. 26) including the positions of F _b5 , F _c5 ) and on the central axes b 5, c 5, d 5 of the respective peripheral filament elements 107, 108, 109. , Only the points B ₅ and C ₅ are shown) are arranged so as to be located on the opposite side of the opening 93 from the positions of the points F _b5 , F _c5 and F _d5 . However, the points F _b5 , F _c5 , and F _d5 include a plane Q ₅ that includes the position of the focal point F ₅ of the rotating body that forms the reflecting surface 95 and that intersects the optical axis Y ₅ of the reflecting mirror 89 perpendicularly. , The intersections with the central axes b ₅ , c ₅ , and d ₅ are shown. As an example, the distance between the focal point F ₅ and the center point A ₅ is 2.35 [mm], and the distance between the points F _b5 , F _c5 , F _d5 and the center points B ₅ , C ₅ , D ₅ is Each distance is 1.20 [mm]. Thus the central filament element 106 and the peripheral filaments elements 107,108,108, the center point of the center point _{A 5} and the peripheral filaments elements 107, 108 and 109 of the central filament element _{106 B 5, C 5, D} 5 is the reflector by arranging so as to be positioned on the opposite side to the opening 93 relative to the focal F ₅ of the reflecting surface 95 of the 89 regions contribute to central illuminance in the reflector 89, i.e. the neighboring region including the focal point F ₅ (Hereinafter referred to as “central illuminance contribution region”), the density of the filament body 102 can be increased, and the central illuminance can be increased.

Such a filament body 102 is accommodated in one cylindrical body having a central filament element 106 and peripheral filament elements 107, 108, 109 having an outer diameter (maximum outer diameter) r ₆ [mm]. The central filament element 106 and the peripheral filament elements 107, 108, 109 can be regarded as a single filament. In such a case, when the maximum inner diameter of the portion of the bulb 101 where the filament body 102 is located is R ₄ [mm], and the maximum outer diameter of the filament body 102 regarded as one filament is r ₆ [mm]. For the reason described later, it is set so as to satisfy the relational expression of 0.25 ≦ r ₆ / R ₄ ≦ 0.75.

The maximum outer diameter r ₆ is determined by the distance D ₈ (or the distance D ₇ ) between the two adjacent filament elements adjacent to the maximum outer diameter r ₀ of the central filament element 106 and the peripheral filament elements 107, 108 and 109. It is possible to adjust by appropriately changing. The maximum outer diameter r ₀ of the central filament element 106 and the peripheral filament elements 107, 108, 109 is determined by the coil length L _C3 of the central filament element 106, the coil length L _S3 of the peripheral filament elements 107, 108, 109, and the coil pitch. It can adjust by changing suitably.

Here, the coil length L _C5 of the central filament element 106 and the coil length L _S5 of the peripheral filament elements 107, 108, 109 may all be the same length. At that time, for example, in the case of a halogen bulb with a rated power of 65 [W], the coil length L _C5 and the coil length L _S5 are set within a range of 3.0 [mm] to 5.0 [mm]. Is preferred. Further, although the coil lengths L _S5 of the peripheral filament elements 107, 108, 109 are all the same, the coil length L _C5 and the coil length L _S5 may be different. At that time, for example, in the case of a halogen lamp with a rated power of 65 [W], the coil length L _C5 is in the range of 3.5 [mm] to 15.0 [mm], and the coil length L _S5 is 1.5 [mm]. mm] to 4.5 [mm] is preferable. Furthermore, the coil length L _C5 and the coil length L _S5 are different, and the coil length L _S5 of each peripheral filament element may be different. In this case, for example, in the case of a halogen lamp with a rated power of 65 [W], the coil length L _C5 is set within a range of 3.5 [mm] to 15.0 [mm], and the coil length L _S5 is all It is preferable that they are set differently within a range of 1.5 [mm] to 4.5 [mm]. The pitch of the single-winding coil is set in the range of 0.05 [mm] to 0.07 [mm] in both the central filament element 106 and the peripheral filament elements 107, 108, and 109.

However, the maximum outer diameter r ₀ and the coil length L _S5 of the individual peripheral filament elements 107, 108, 109 are such that the illuminance irradiated from the peripheral filament elements 107, 108, 109 to the irradiation surface is uniform. Therefore, it is preferable that at least one of the maximum outer diameter r ₀ and the coil length L _S5 is the same size, and it is more preferable that both dimensions are the same size. However, the maximum outer diameter r ₀ and the coil length L _S5 may vary between the individual peripheral filament elements 107, 108, 109 due to processing variations in the manufacturing process of the peripheral filament elements 107, 108, 109.

The ends of the filament elements 106, 107, 108, 109 on the opening 93 side are preferably located in substantially the same plane. Thereby, the illumination intensity to the irradiation surface irradiated by each filament element 106,107,108,109 can be made uniform, and a uniform light distribution curve can be obtained.
Furthermore, the coil length L _C5 [mm] of the central filament element 106 and the coil lengths L _S5 [mm] of the peripheral filament elements 107, 108, and 109 are 0.2 ≦ L _S5 / L _C5 ≦ 0. It is preferable that the relational expression 9 is satisfied. However, the coil lengths L _S5 of the peripheral filament elements 107, 108, 109 are substantially equal. Of course, “substantially equal” means that each coil length L _S5 varies due to variations in the coil manufacturing process as described above.

In that case, the distance D ₇ between the central filament element 106 and each of the peripheral filament elements 107, 108, 109 is set in the range of 0.1 [mm] to 2.2 [mm], respectively. Is preferred. Thereby, the density of the filament body 102 in the central illuminance contribution region contributing to the central illuminance in the reflecting mirror 89 can be further increased, and the central illuminance can be further increased. Arc discharge occurs between the peripheral filament elements 107, 108 and 109, and the arc discharge can prevent the central filament element 106 and the peripheral filament elements 107, 108 and 109 from being disconnected. On the other hand, if the _{D 7} is less than 0.1 [mm], the lighting in an arc discharge is generated between the central filament element 106 and the peripheral filaments elements 107, 108, 109, the central filament element 106 by the arc discharge Or the peripheral filament elements 107, 108, 109 may be broken. Further, when the D ₇ exceeds 2.2 [mm], the density of the filament body 102 located in the central illuminance contribution region decreases, and the central illuminance cannot be sufficiently increased, or the peripheral filament element 107 , 108 and 109 increase the illuminance in the peripheral region of the central portion of the irradiation surface, and a desired beam angle, particularly a narrow beam angle (for example, 10 degrees, in which case the allowable range is 7.5 degrees to 12.5). May not be obtained).

  Here, as the coil constituting the central filament element 106 and the peripheral filament elements 107, 108, 109, a double-winding coil or a triple-winding coil can be used in addition to the single-winding coil, but the viewpoint of increasing the central illuminance. From the above, the pitch can be reduced as compared with the double winding coil and the triple winding coil, and the density of the filament body 102 located in the central illuminance contribution region contributing to the central illuminance in the reflecting mirror 89 is increased. It is preferable to use a single winding coil that can be used.

Next, when the maximum inner diameter of the portion of the bulb 101 where the filament body 102 is located is R ₄ [mm] and the maximum outer diameter of the filament body 102 is r ₆ [mm], 0.25 ≦ r ₆ The reason why the relational expression / R ₄ ≦ 0.75 is satisfied will be described.
First, the reflector with halogen bulb 88 rated power 65 described above [W], among the valve 101, the maximum inner diameter _{R 4} of the portion filament body 102 is positioned and fixed with 9 [mm], the filament 102 10 were produced by varying the maximum outer diameter r ₆ [mm] of each as shown in Table 4 by appropriately changing the distance D ₈ between the two adjacent peripheral filament elements. Then, each manufactured product is lit at the rated power, and the number of filament bodies 102 that have been disconnected until 3500 hours of lighting has elapsed and 4000 hours of lighting has elapsed, and among the number of filament bodies 102 that have not been disconnected, 4000 When the number of blackened parts on the inner surface of the bulb 69 when the time was lit was examined, the results as shown in Table 4 were obtained.

  In Table 4, in the “Presence / absence of disconnection” column, the denominator indicates the total number of samples, and the numerator indicates the number of the disconnected filament bodies 102 out of the total number of samples. In addition, in the “Presence of blackening” column, the number of samples in which the denominator was not disconnected out of the total number of samples, and the number of samples in which the numerator was blacked out of the number of samples in which the numerator was not disconnected is shown. Each is shown. However, in the determination of blackening, it is determined that “blackening is present” when it can be visually confirmed that black coloring matter is attached to the inner surface of the valve 101.

Moreover, as a lighting method, this was repeated for one cycle of lighting for 5.5 hours and turning off for 0.5 hours. “Lighting elapsed time” is the cumulative time of the lighting time.
In each sample prepared, a central filament element 106 and the peripheral filaments elements 107, 108 and 109 also pitch either has 0.05 [mm] ~0.07 [mm] , the maximum outer diameter _{r 0} is 0.65 [ mm]. However, the coil length L _C5 of the central filament element is 5.7 [mm], and the coil length L _S5 of the peripheral filament element is 3.4 [mm].

As apparent from Table 4, when the relational expression 0.25 ≦ r ₆ / R ₄ ≦ 0.75 is satisfied, for example, r ₆ / R ₄ = (0.25, 0.35, 0.50, 0. In the case of 75), none of the samples had the filament body 102 disconnected until 3500 hours of lighting elapsed, and none of the inner surface of the bulb 101 was blackened. In particular, when satisfying the relational expression of 0.35 ≦ r ₆ / R ₄ ≦ 0.75, for example, when r ₆ / R ₄ = (0.35, 0.50, 0.75), any sample None of the filament bodies 102 was disconnected until the lapse of 4000 hours.

On the other hand, when satisfying the relational expression of 0.25> r ₆ / R ₄ , for example, when r ₆ / R ₄ = (0.20), 6 out of 10 samples are filament bodies before lapse of 4000 hours of lighting 102 was disconnected, but no blackening occurred on the inner surface of the valve 101 in any of the four samples remaining without disconnection. Further, when the relational expression r ₆ / R ₄ > 0.75 is satisfied, for example, when r ₆ / R ₄ = (0.80), the filament body 102 is not used until lapse of 4000 hours in all of the ten pieces. However, blackening occurred on the inner surface of the valve 101 in all of the ten valves.

The reason for such a result is as described above.
Therefore, when the maximum inner diameter of the portion of the bulb 101 where the filament body 102 is located is R ₄ [mm] and the maximum outer diameter of the filament body 102 is r ₆ [mm], the inner surface of the bulb 101 is blackened. In order to prevent the filament body 102 from being disconnected and to prolong the service life, it has been found that the relational expression 0.25 ≦ r ₆ / R ₄ ≦ 0.75 should be satisfied. In particular, it was found that the relationship of 0.35 ≦ r ₆ / R ₄ ≦ 0.75 should be satisfied in order to further extend the life.

Next, assuming that the coil length of the central filament element 106 is L _C5 [mm] and the coil lengths of the peripheral filament elements 107, 108, 109 are L _S5 [mm], 0.2 ≦ L _S5 / L _C5 ≦ 0. The reason why it is defined so as to satisfy the relational expression 9 will be described.
First, regarding the halogen bulb 88 with a reflector having the rated power of 65 [W], the coil length L _C3 of the central filament element 106 and the coil lengths L _S3 of the peripheral filament elements 107, 108, 109 are various as shown in Table 5. Five pieces of each changed were produced. Then, each fabricated product was turned on at the rated power, and its beam angle (degree) and central illuminance [lx] were examined. As shown in Table 5 and FIG. 31 (relationship between L _S3 / L _C3 and the beam angle). The following results were obtained. Further, as a typical light distribution curve, the case of L _S3 / L _C3 = 0.9 is shown in FIG. 32, and the case of L _S3 / L _C3 = 0.6 is shown in FIG.

In each sample produced, the maximum inner diameter R of the portion of the bulb 101 where the filament body 102 is located is 9.0 [mm]. Both the central filament element 106 and the peripheral filaments elements 107, 108 and 109 is made of single-turn coil, the pitch of 0.05 [mm] ~0.07 [mm] , the maximum outer diameter _{r 0} is 0.65 [mm ]. The maximum outer diameter r ₆ of the filament body 102 is 4.50 [mm]. The distance _{D 7} is 1.275 [mm].

In Table 5, “beam angle” indicates an average value of five samples. The beam angle of 10 degrees (allowable range: 7.5 degrees to 12.5 degrees), which is the mainstream of what is currently marketed as a narrow angle type, was used as an evaluation standard.
Further, “center illuminance” indicates an average value of five samples. Currently, in a commercially available halogen bulb with a reflector (hereinafter referred to as “conventional product”) with a rated power of 65 [W] (rated voltage 110 [V]) with a beam angle of 10 degrees, the central illuminance is, for example, 6500 [lx ] (6500 [cd] in terms of central luminous intensity). Therefore, as an evaluation standard, considering the demand from the market and the like, it is increased by about 10% with respect to the central illuminance (6500 [lx]) of the conventional product, that is, 7200 [lx] (7200 [cd] in terms of central luminous intensity). The above was used as an evaluation standard.

As is apparent from Table 5, when the relational expression 0.2 ≦ L _S3 / L _C3 ≦ 0.9 is satisfied, for example, L _S3 / L _C3 = (0.2, 0.3, 0.4, 0. In the case of 5, 0.6, 0.7, 0.8, 0.9), the central illuminance is 8500 [lx] (8500 [cd in terms of central luminous intensity) exceeding the central illuminance (6500 [lx]) of the conventional product. It was found that the beam angle was in the range of 7.5 to 12.5 degrees, and all satisfied the above-mentioned evaluation criteria. This is also apparent from the light distribution curves shown in FIGS. 32 and 33, where the illuminance at the central portion on the irradiation surface is high, and the irradiation light does not spread to the peripheral region of the central portion.

On the other hand, when the relational expression L _S3 / L _C3 > 0.9 is satisfied, for example, when L _S3 / L _C3 = (1.0), the central illuminance exceeds the central illuminance (6500 [lx]) of the conventional product. Although the above evaluation criteria were satisfied, it was found that the beam angle was 13.0 degrees and did not satisfy the above evaluation criteria. When the relational expression L _S3 / L _C3 <0.2 is satisfied, for example, when L _S3 / L _C3 = (0, 0.1), the beam angle is 7.5 degrees, and the above-described evaluation criteria However, it was found that the central illuminance does not satisfy the above evaluation criteria.

The reason for this result can be considered as follows.
That is, the relational expression L _S3 / L _C3 ≦ 0.9 is satisfied, and the coil length L _C3 of the central filament element 106 is relatively relative to the coil length L _S3 of the peripheral filament elements 107, 108, 109 within an appropriate range. By increasing the length, the coil L _S3 of the peripheral filament elements 107, 108, and 109 that greatly contributes to the increase and decrease of the illuminance in the peripheral region of the central portion on the irradiation surface can be appropriately shortened. The coil length L _C3 of the central filament element 106 that greatly contributes to increase / decrease in the illuminance (center illuminance) of the portion can be made as long as possible. As a result, first, it is possible to reduce the illuminance in the peripheral area of the central portion of the irradiated surface as much as possible while leaving the contribution of the peripheral filament elements 107, 108, 109 to the increase in illuminance with respect to the central portion of the irradiated surface. it can. Second, the illuminance to the central portion of the irradiated surface can be further increased by increasing the coil length L _C3 of the central filament element 106. And it is thought that these results overlapped and the favorable light distribution curve as shown in FIG. 32 and FIG. 33 was obtained. However, if the relational expression of L _S3 / L _C3 <0.2 is satisfied, the coil length L _C3 of the central filament element 106 becomes long, but there are many portions that deviate from the central illuminance contribution region in the reflector 89. The relative length of the coil length L _S3 of the peripheral filament elements 107, 108, 109 with respect to the coil length L _C3 of the central filament element 106 becomes too small, and the effect of installing the peripheral filament elements 107, 108, 109 is obtained. It is thought that it has decreased remarkably. On the other hand, when the relational expression L _S3 / L _C3 > 0.9 is satisfied, the coil length L _C3 of the central filament element 106 is sufficiently long relative to the coil length L _S3 of the peripheral filament elements 107, 108, 109. Therefore, it is considered that the peripheral filament elements 107, 108, 109 increase the illuminance in the peripheral area of the central portion on the irradiation surface, and a desired beam angle cannot be obtained.

Accordingly, when the coil length of the central filament element 106 is L _C3 [mm] and the coil length of the peripheral filament elements 107, 108, 109 is L _S3 [mm], the central filament element 106 and the peripheral filament elements 107, 108, 109 In order to obtain a desired beam angle (narrow angle) and realize good light distribution characteristics while increasing the central illuminance by the contribution of both, a relational expression 0.2 ≦ L _S3 / L _C3 ≦ 0.9 I found out that

  As described above, according to the configuration of the halogen bulb 88 with a reflector according to the eleventh embodiment of the present invention, the bulb 101 and the filament are similar to the halogen bulb 31 according to the eighth embodiment of the present invention described above. Since the convection layer generated between the body 102 and the body 102 can be made extremely thin, the amount of evaporation of tungsten, which is a constituent material of the filament body 102, can be remarkably reduced. It is possible to prevent the tungsten wire from being thin and to be disconnected, and to extend the life. In addition, since the gap between the bulb 101 and the filament body 102 is moderately maintained, it is possible to suppress both the bulb 101 and the filament body 102 from becoming abnormally hot during lighting. Can be prevented, or the inner surface of the bulb 101 can be prevented from blackening due to excessive evaporation of the filament body 102.

In particular, when the coil length of the central filament element 106 is L _C3 [mm] and the coil lengths of the peripheral filament elements 107, 108, and 109 are L _S3 [mm], 0.2 ≦ L _S3 / L _C3 ≦ 0.9 By satisfying the following relational expression, the central illuminance is increased by the contribution of both the central filament element 106 and the peripheral filament elements 107, 108, and 109, and the spread of irradiation light by the peripheral filament elements 107, 108, and 109 is suppressed. Thus, a narrow beam angle can be obtained and good light distribution characteristics can be realized.

In particular, the distance D ₇ between the central filament element 106 and each peripheral filament element 107, 108, 109 is set to a range of 0.1 [mm] to 2.2 [mm], respectively. The density of the filament body 102 in the central illuminance contribution region can be further increased, the central illuminance can be extremely increased, and between the central filament element 106 and the peripheral filament elements 107, 108, 109 during lighting. It is possible to prevent arc discharge from occurring and disconnection of the central filament element 106 and the peripheral filament elements 107, 108, and 109 due to the arc discharge.

  In the eleventh embodiment, the case where the three peripheral filament elements 107, 108, and 109 are arranged so as to form a substantially equilateral triangle has been described. Or 5 peripheral filament elements arranged to form a substantially regular pentagon, 6 peripheral filament elements arranged to form a substantially regular hexagon, or more Even if it is a case, the effect similar to the above can be acquired.

  In the eleventh embodiment, the bulb 101 has been described as having a shape in which the tip-off portion 98, the substantially cylindrical light emitting portion 99, and the sealing portion 100 are successively formed. Not limited to this, a chip-off part (may not be present in some cases), a bulb in which a substantially spheroidal light emitting part and a sealing part are successively formed, and a chip-off part (may not be present in some cases) A bulb having a substantially spheroid shape, a bulb having a reduced diameter portion and a sealing portion successively formed, a tip-off portion (may not be present in some cases), a light portion having a substantially spheroid shape, Even when a well-known various shape valve such as a valve in which the reduced diameter portion, the cylindrical portion, and the sealing portion are sequentially formed is used, the same effect as described above can be obtained. Of course, instead of the above-described substantially spheroidal shape, a light emitting portion having a substantially spherical shape or a substantially composite ellipsoidal shape can also be used.

Further, in the eleventh embodiment, the outer shape of the cross section cut in a direction perpendicular to the central axes a5, b5, c5, d5 in the longitudinal direction so as to form a circular shape so that the tungsten wire has a cylindrical shape. The case of using the filament elements 106, 107, 108, and 109 formed of a single-winding coil wound on the wire has been described. However, the present invention is not particularly limited to the outer shape, and for example, as shown in FIG. 28, the outer shape of a cross section cut perpendicular to the central axes a5, b5, c5, and d5 in the longitudinal direction. Even when filament elements 74, 75, 76, 77 made of coils wound so as to draw an ellipse are used, the same effect as described above can be obtained.
(Embodiment 12)
Next, the illuminating device according to the twelfth embodiment of the present invention is used as general illumination such as a spotlight, and has a rated power of 65 according to the tenth embodiment of the present invention described above. The halogen lamp 31 of [W] has a configuration attached to various known lighting fixtures (not shown).

A lighting fixture is usually formed with a planar or curved reflector or a concave reflector. The radiated light emitted from the halogen bulb 31 is reflected by the reflecting plate or the reflecting mirror, and is irradiated from the light irradiation opening of the lighting fixture.
According to the configuration of the lighting apparatus according to the twelfth embodiment of the present invention, a long-life lighting apparatus can be realized.
(Embodiment 13)
Next, the illuminating device according to the thirteenth embodiment of the present invention is used as general illumination such as a spotlight, for example, and has a rated power of 65 according to the above-described ninth embodiment of the present invention. The halogen lamp 53 of [W] has a configuration attached to various known lighting fixtures (not shown).

  The luminaire is provided with a concave reflecting mirror portion whose reflection surface is a spheroid or a paraboloid. However, the reflecting mirror portion may be fixed to the lighting fixture and cannot be replaced, or may be replaceable according to the intended use. The radiated light emitted from the halogen bulb 53 is reflected by the reflecting mirror portion and irradiated from the light irradiation opening of the lighting fixture.

According to the configuration of the lighting apparatus according to the thirteenth embodiment of the present invention, a long-life lighting apparatus can be realized.
(Embodiment 14)
Next, the illumination device according to the fourteenth embodiment of the present invention is used as general illumination such as a spotlight, for example, and has a rated power of 65 according to the tenth embodiment of the present invention described above. A halogen lamp 79 with a reflector [W] has a configuration in which it is attached to various known lighting fixtures (not shown).

According to the configuration of the illumination device according to the fourteenth embodiment of the present invention, a long-life illumination device can be realized.
(Embodiment 15)
Next, the illumination apparatus according to the fifteenth embodiment of the present invention is used as general illumination such as a spotlight, for example, and has a rated power of 65 according to the eleventh embodiment of the present invention described above. A halogen lamp 88 with a reflecting mirror of [W] has a configuration attached to various known lighting fixtures (not shown).

According to the configuration of the illumination device according to the fifteenth embodiment of the present invention, a long-life illumination device can be realized.
In each of the above-described embodiments, the case where a halogen light bulb with a rated power of 65 [W] is used has been described. However, the present invention is not limited thereto, and for example, a halogen light bulb with a rated power of 20 [W] to 150 [W] is used. Even in this case, the same effect as described above can be obtained.

  In each of the above-described embodiments, the case where a halogen bulb is used has been described. However, even when various known incandescent bulbs are used instead of this type of halogen bulb, the same effect as described above can be obtained. Is.

The present invention can reduce the size of the light emitter without using multiple winding coils, can improve the light collection efficiency, is easy to manufacture, and has high mass productivity.
In addition, while increasing the central illuminance, it is possible to achieve good light distribution characteristics, especially with a narrow-angle beam angle type, and there is a demand for miniaturization required for general lighting, especially for store lighting. As well as responding to the demands that display products stand out,
Furthermore, since the lifetime can be extended, the life cycle of the tube can be extended, the inconvenience of replacing the bulb can be reduced, and its industrial applicability is very wide and large.

  The present invention relates to a tube, a tube with a reflector, and an illumination device, and more particularly to a filament wiring structure.

A tube with a reflector, for example, a halogen bulb with a reflector, has a configuration in which a halogen bulb is incorporated in a concave reflector, for example, for studio lighting or for general lighting such as spotlights in commercial facilities. in use.
There is a demand for further improvement in light collection efficiency for the halogen bulb. Here, “light collection efficiency” indicates the illuminance [lx / W] per electric power.

  The halogen light bulb includes a bulb and a filament body provided in the bulb. It is known that the filament body can be made closer to a point light source as it is made compact, and the light collection efficiency can be improved in combination with a reflecting mirror. However, in general, when the rated voltage [V], the rated power [W], and the rated life time (for example, 3000 hours) are determined, the strand length and strand diameter of the tungsten wire constituting the filament body Therefore, the filament body cannot be made compact by simply shortening the wire length, for example.

  When the rated voltage and the rated power are determined, the resistance value R of the filament body is determined. For example, when the wire length is shortened, it is necessary to reduce the wire diameter in order to maintain the resistance value R. However, if the wire diameter is reduced, the tungsten wire becomes thinner due to evaporation of tungsten during lighting and the wire tends to be broken, and the life time tends to be shortened. On the other hand, when the wire diameter is increased in order to ensure the lifetime, it is necessary to increase the wire length in order to maintain the resistance value R. However, if the wire length becomes too long, it is necessary to keep the dimensions of the filament body within a certain range according to the size of the bulb, etc., so the filament in a state where the pitch is reduced or provided in the bulb The tension applied to the body must be reduced, and the mechanical strength of the filament body may be weakened and may be broken. Therefore, in order to satisfy the predetermined rated voltage, rated power, and rated life time, the wire length and the wire diameter are substantially uniquely determined, and it is difficult to make the filament body compact. .

  In addition, a commercially available halogen light bulb with a reflector used for general illumination such as a spotlight has a beam angle of 10 degrees and the mirror diameter φ of the reflector is 50 [mm]. Under the constraint that the power is 65 [W] (rated voltage 110 [V]), the central illuminance has reached 6500 [lx] (6500 [cd] in terms of central luminosity). Improvement is desired.

The “central illuminance” here refers to the illuminance of the area where the optical axis of the reflecting mirror and the irradiation surface intersect on the irradiation surface.
Furthermore, it is desired to extend the life of the tube.
In order to improve the light collection efficiency and the central illuminance under the above restrictions, the following inventions have been made.

  That is, in a halogen lamp with a reflector used for studio lighting, a plurality of filament elements wound linearly and spirally are provided in order to increase the light collection efficiency and increase the central illuminance. There is known one using a filament body in which filament elements are arranged in parallel to the optical axis of a reflecting mirror and arranged almost symmetrically around the optical axis so as to form a regular triangle or square (for example, Patent Document 1).

  In particular, in a halogen bulb with a reflector using a halogen bulb in which an infrared reflecting film is formed on the outer surface of the glass bulb in order to improve luminous efficiency, the infrared ray radiated from the filament element and reflected by this infrared reflecting film In order to efficiently return the filament element to the filament element, a filament element wound linearly and spirally on the optical axis with respect to the filament body used in the conventional halogen lamp with a reflector is also provided. A filament arranged on the optical axis (hereinafter referred to as “central filament element”) and at least three other filaments arranged substantially symmetrically around the filament (hereinafter referred to as “peripheral filament element”) The thing using the filament body which consists of is proposed (for example, refer patent document 2).

Note that “luminous efficiency” here refers to the luminous flux [lm / W] per electric power.
Furthermore, generally in a halogen bulb with a rated voltage of 100 [V] or more, a double-wound coil is often used as a filament body as another means for making the filament body compact and approaching a point light source. In order to achieve compactness, a device using a triple coil as a filament body has been proposed (see, for example, Patent Document 3).
Japanese National Patent Publication No. 6-510881 JP 2002-63869 A JP 2001-345077 A

  However, it is considered that it is very difficult to apply the conventional technique to a halogen light bulb with a reflector for general illumination such as a spotlight and to realize a particularly narrow beam angle type. In a conventional halogen light bulb with a reflector for general illumination having a rated power of 65 [W] and a beam angle of 10 degrees, the one using the filament body described in Patent Document 1 and described in Patent Document 2 When the light distribution curve with the one using the filament body was examined, the result was as shown in FIG. In FIG. 34, the characteristic of the conventional halogen lamp with a reflector for general illumination that uses the filament body described in Patent Document 1 is indicated by a broken line (i). The characteristic of the light bulb using the filament body described in Patent Document 2 is indicated by a solid line (ii). As is apparent from FIG. 34, in the former case, the filament element arranged around the optical axis increases the illuminance in the peripheral area of the portion corresponding to the optical axis on the irradiation surface, while the central illuminance (angle 0 degree). In the latter case, the peripheral filament element increases the illuminance not only in the area corresponding to the optical axis but also in the peripheral area. As a whole, the beam angle was 13 degrees or more.

  Among the halogen lamps with reflectors for general illumination currently on the market, the mainstream beam angle is 10 degrees although it is called the narrow-angle type. According to IEC standard 60357, the allowable range of error of the beam angle (10 degrees) is ± 25%, that is, when the standard of the beam angle is 10 degrees, the allowable range of error is from 7.5 degrees. It will be up to 12.5 degrees. Therefore, even when the conventional filament body as described above is applied to a halogen lamp with a reflector used for general illumination such as a spotlight, the above-described error tolerance is exceeded and a desired beam angle (for example, 10 Degree).

  Such a problem is not particularly noticeable when it is used for studio lighting. This is considered to be mainly due to the difference in the mirror diameter φ of the reflecting mirror. That is, the mirror diameter φ of the reflector used in the halogen bulb with a reflector for general illumination is mainly 35 [mm] to 100 [mm], whereas the halogen bulb with a reflector for studio illumination. The mirror diameter [phi] of the reflector used in is mainly 200 [mm] to 400 [mm]. The region contributing to the central illuminance in the reflecting mirror (hereinafter simply referred to as “central illuminance contributing region”) is in the vicinity thereof including the focal point of the reflecting mirror. The central illuminance contribution region is smaller as the mirror diameter φ of the reflecting mirror is smaller and larger as the mirror diameter φ is larger. Therefore, the halogen light bulb with a reflector for studio lighting has a large central illuminance contribution region, and as a result, the light emitted from the light emitting unit arranged around the optical axis also greatly contributes to the central illuminance. It is believed that there is.

  Further, when this kind of halogen lamp with a reflector is used for studio lighting, its rated life is mainly 200 hours to 500 hours, and in some cases 2000 hours, and is used for general lighting such as spotlights. In some cases, the rated life is required to be 2000 hours to 3000 hours, sometimes exceeding 3000 hours. However, the above-described conventional halogen bulb with a reflector is commercially available for studio lighting that does not require a long life. Therefore, sufficient consideration has not been made with respect to the lifetime, and there is still room for improvement with respect to the lifetime, particularly when used for general lighting such as spotlights.

  Furthermore, if the coil to be used as a filament body provided in a halogen bulb with a reflector is doubled or tripled, vibration resistance tends to decrease. Especially when a triple-wound coil is provided in the bulb as a filament body. In order to improve vibration resistance, it is necessary to electrically and mechanically connect the triple-wound coil to the internal lead wire or the like in a state where the coil is pulled in the longitudinal direction, that is, in a state where tension is applied. However, in such a case, the pitch of the tertiary coil in the triple-winding coil becomes large, and the entire triple-winding coil becomes longer in the longitudinal direction, which prevents the compactness of the filament body, resulting in a problem that the light collection efficiency cannot be improved. Therefore, a means to replace the triple winding coil is required.

  The present invention has been made in view of such circumstances. The first object is to improve the light collection efficiency, the second object is to increase the central illuminance, and the third object is to narrow the beam angle. Provided are a tube, a tube with a reflecting mirror, and an illumination device that can achieve good light distribution characteristics with a square type and can achieve a long life as a fourth object.

In order to solve the above-described problem of improving the light collection efficiency, the tube according to the present invention is incorporated in the concave reflecting mirror of the lighting device, and the rated voltage is set to 100 [V] or more and 250 [V] or less. A tube having a bulb and a filament body provided in the bulb, the filament body having a plurality of filament elements, and the bulb being incorporated in the reflector In, in the position containing the focal point of the reflector,
Each of the plurality of filament elements is a single-wound coil, one on the optical axis of the reflecting mirror, and one or more of the remaining coils on an axis parallel to the axis of the central filament element. Arranged,
Each of the filament elements has a configuration in which the contour when viewed from the winding axis direction is different from a substantially circular shape.

  Moreover, in the tube with a reflector according to the present invention, a concave reflector and a tube arranged in the reflector and having a rated voltage set to 100 [V] or more and 250 [V] or less. The tube has a bulb and a filament body provided in the bulb, the filament body is arranged to contain the focal point of the reflector, and has a plurality of filament elements, Each of the plurality of filament elements is a single wound coil, one is arranged on the optical axis of the reflecting mirror, and one or more of the remaining coils are arranged on an axis parallel to the optical axis. Each filament element has a configuration in which the contour when viewed from the winding axis direction is different from a substantially circular shape.

In order to solve the above problems of improvement in central illuminance and light distribution characteristics, a tube with a reflector according to the present invention is provided with a concave reflector, a bulb, and a bulb and the bulb. A tube having a filament body, the filament body having a linear central filament element whose longitudinal center axis is substantially located on the optical axis of the reflector, and the center Around the filament element, there is at least three peripheral filament elements arranged such that the longitudinal central axis is substantially parallel to the longitudinal central axis of the central filament element, the peripheral filament element being When the intersection points where the central axis in the longitudinal direction of each of the peripheral filament elements intersects the plane perpendicular to the central axis in the longitudinal direction of the central filament element are The intersection of the longitudinal central axis and the plane of the central filament element centroids are arranged to form a substantially regular polygon to (centroid), and the length L _C of the longitudinal direction of the central filament element , the longitudinal length L _S of the peripheral filaments element, L _S / L _C is such that 0.2 to 0.9, and a configuration that is adjusted.

Moreover, in the tube according to the present invention, the tube is incorporated in the reflecting mirror portion of the lighting device, and the tube includes a bulb and a filament body provided in the bulb, and the filament body Is a linear central filament element whose longitudinal center axis is substantially located on the optical axis of the reflecting mirror portion when the tube is incorporated in the reflecting mirror portion, and around the central filament element, At least three peripheral filament elements arranged such that a longitudinal central axis is substantially parallel to a longitudinal central axis of the central filament element, wherein the peripheral filament elements are each of the peripheral filaments When the intersection of the central axis in the longitudinal direction of the element and the plane perpendicular to the central axis in the longitudinal direction of the central filament element is connected, the central filament element is required. Longitudinal central axis and the center of gravity of the point of intersection between the plane (centroid) and are arranged to form a substantially regular polygon, the longitudinal length L _C of the central filament element, the periphery of the The length L _S in the longitudinal direction of the filament element is adjusted so that L _S / L _C is 0.2 or more and 0.9 or less.

  In order to solve the problem of the lifetime, the tube according to the present invention includes a bulb and a filament body that is disposed inside the bulb and has at least three linear filament elements, and the filament element includes: The central axis in the longitudinal direction is substantially parallel to the central axis in the longitudinal direction of the bulb, and is forested so as to surround the central axis in the longitudinal direction of the bulb. An abbreviation having a center of gravity (centroid) as the intersection of the central axis in the longitudinal direction of the valve and the plane when the intersection of the central axis and the plane perpendicular to the central axis in the longitudinal direction of the bulb is connected. It is arranged so as to form a regular polygon, and the maximum inner diameter R of the portion of the bulb where the filament body is located and the maximum outer diameter r of the filament body are r R has a structure which is adjusted to be 0.25 to 0.75.

  Moreover, in the tube according to the present invention, the tube is incorporated in a reflecting mirror portion of the lighting device, and the tube includes a bulb and a filament body arranged inside the bulb, and the filament The body has a linear central filament element whose longitudinal center axis is substantially located on the optical axis of the reflecting mirror portion when the tube is incorporated in the reflecting mirror portion, and around the central filament element. , At least three peripheral filament elements arranged such that a longitudinal central axis is substantially parallel to a longitudinal central axis of the central filament element, wherein the peripheral filament element is When the intersection of the longitudinal center axis of the filament element and the plane perpendicular to the longitudinal center axis of the central filament element is connected, the central filament Arranged so as to form a substantially regular polygon whose center of gravity (centroid) is the intersection of the central axis in the longitudinal direction of the element and the plane, and the portion of the bulb where the filament body is located The maximum inner diameter R and the maximum outer diameter r of the filament body are adjusted so that r / R is 0.25 or more and 0.75 or less.

  Furthermore, in the tube with a reflector according to the present invention, a tube having a concave reflector, a bulb disposed in the reflector and having a bulb and a filament body provided in the bulb. The filament body has a linear central filament element whose longitudinal center axis is substantially located on the optical axis of the reflecting mirror, and a longitudinal central axis around the central filament element. At least three peripheral filament elements arranged so as to be substantially parallel to the longitudinal central axis of the filament element, the peripheral filament element having a longitudinal central axis of each of the peripheral filament elements; When the intersections where the plane perpendicular to the central axis in the longitudinal direction of the central filament element intersects are respectively connected, the central axis in the longitudinal direction of the central filament element and the plane Are arranged so as to form a substantially regular polygon whose center of gravity (centroid) is the intersection of the filament and the maximum inner diameter R of the portion of the bulb where the filament body is located, and the maximum of the filament body The outer diameter r is adjusted so that r / R is 0.25 or more and 0.75 or less.

  As described above, the tube according to the present invention is a tube having a rated voltage of 100 [V] or more and 250 [V] or less that is incorporated in the reflecting mirror of the illumination device, and the tube includes the valve and the valve. The filament body is arranged so as to contain the focal point of the reflector in a state where the tube is incorporated in the reflector, and a plurality of filaments Since each of the plurality of filament elements has a single-wound coil, vibration resistance can be improved as compared with a multi-winding coil.

  Further, in the tube, since each of the plurality of filament elements constituting the filament body is a single wound coil, the pitch of the coil can be made smaller than that of the multiple wound coil, One filament element is arranged on the optical axis of the reflecting mirror, and one or more of the remaining coils are arranged on an axis parallel to the optical axis, so that the filament element is arranged on the optical axis of the reflecting mirror. Compared with the case where no is arranged, the central illuminance and the light collection efficiency can be improved.

  Further, in the tube, each of the filament elements is formed so that the outline when viewed from the winding axis direction is different from a substantially circular shape, so that the outline of the filament element when viewed from the winding axis direction is The length of the filament body in the optical axis direction can be shortened as compared with a case of a substantially circular shape, that is, a perfect circle or a circle close to a true circle distorted by high or low processing accuracy. Therefore, the tube can increase the ratio of the filament body existing in the central illumination contribution area in the reflecting mirror as compared with the conventional tube, thereby increasing the center illumination and improving the light collection efficiency. Can do.

It is preferable that the contour is flat because the manufacturing is easy.
If the outline is a rectangle, a substantially track shape or an oval, it will be easier to manufacture, and it is preferable that the outline or the oval is produced using a core wire that has been conventionally used for producing filament elements. This is preferable because it is easier to manufacture.

  If the number of the plurality of filament elements is three, the number of the peripheral filament elements can be reduced, and the light emitted from the central filament element can be prevented from being blocked by the peripheral filament elements. The central illuminance can be increased and the light collection efficiency can be improved. Further, since the number of filament elements in the filament body is reduced, the gap between the filament elements can be widened, and the impact resistance, vibration resistance and Lifespan can be improved.

If the three filament elements are provided in the bulb so that their winding axes are arranged on the same plane, it is possible to achieve a uniform light distribution on the irradiation surface.
If the reflecting surface of the reflecting mirror is a spheroid outer peripheral surface or a parabolic surface, and the aperture inner diameter is 30 [mm] or more and 100 [mm] or less, the beam angle is 7.5 degrees or more and 12 degrees. Less than 5 degrees, so-called narrow angle can be easily adjusted, which is preferable.

The above effect can be obtained even if the tube has a concave reflecting mirror.
Even if the above-mentioned tube is incorporated in a lighting fixture provided with a reflecting mirror, the above-mentioned effect can be obtained in the same manner.
As described above, in the tube with a reflector according to the present invention, a tube having a concave reflector, a bulb disposed in the reflector, and a filament body provided in the bulb. The filament body includes a linear central filament element whose longitudinal central axis is substantially located on the optical axis of the reflector, and a longitudinal central axis around the central filament element. Having at least three peripheral filament elements arranged so as to be substantially parallel to the longitudinal central axis of the central filament element, the peripheral filament element being in the longitudinal direction of each peripheral filament element On the central axis in the longitudinal direction of the central filament element when connecting the intersections where the central axis and a plane perpendicular to the longitudinal central axis of the central filament element intersect Are arranged to form a substantially regular polygon to the center of gravity (centroid) of the point, the coil length L _C [mm] of the center filament element, coil length L _S of the peripheral filaments element [mm] and When the ratio of Ls / Lc is Ls / Lc, the coil length Lc of the central filament element and the coil length Ls of the peripheral filament element are determined so that L _S / L _C is 0.2 or more and 0.9 or less. Therefore, the coil length Ls of the peripheral filament element can be made relatively shorter than the coil length Lc of the central filament element, or the coil length Lc of the central filament element can be made shorter than the coil length of the peripheral filament element. Since it can be made relatively long compared to Ls, the central illuminance can be improved and the central illuminance can be maximized compared to a conventional tube with a reflector. In addition, the beam angle can be narrowed. Therefore, the tube with the reflector can increase the central illuminance as compared with the conventional tube with the reflector, and can realize a good light distribution characteristic particularly with a narrow-angle beam angle. it can.

If the distance D ₁ of the between the central filament element and each of the peripheral filaments element is set to 0.1 [mm] or more 2.2 [mm] or less, of the filament assemblies in the central illuminance contribution region Since the density can be increased and arc discharge can be prevented from occurring between the central filament element and each peripheral filament element constituting the filament body, the central illuminance compared to a conventional tube with a reflector Can be improved, and disconnection of each filament element can be suppressed.

The above effect is not limited to the case where the reflecting mirror is provided on the tube, but can be obtained similarly when the tube is provided on the side of the lighting device to be mounted. However, it is a premise that the optical axis of the reflecting mirror provided in the illumination device and the central axis in the longitudinal direction of the tube are substantially coincident.
The above-mentioned effect is not limited to a tube with a reflector. Even if a tube without a reflector is abolished from the tube with a reflector and incorporated into an illumination device having a reflector, Obtained in the same way. However, it is premised on that the optical axis of the reflecting mirror portion and the central axis in the longitudinal direction of the tube without the reflecting mirror substantially coincide.

When the tube with a reflector is attached to a lighting device, the above effect can be obtained.
As described above, the tube according to the present invention includes a bulb and a filament body that is disposed inside the bulb and has at least three linear filament elements, and the filament element has a longitudinal center. The shaft is substantially parallel to the central axis in the longitudinal direction of the bulb and is forested so as to surround the central axis in the longitudinal direction of the bulb, and the longitudinal central axis of each filament element and the bulb When a cross point intersecting with a plane perpendicular to the central axis in the longitudinal direction is connected, a substantially regular polygon having a center of gravity (centroid) at a point on the central axis in the longitudinal direction of the bulb is formed. The ratio of the maximum inner diameter R [mm] of the portion of the bulb where the filament body is located to the maximum outer diameter r [mm] of the filament body is r / R. Since the maximum outer diameter r and the maximum inner diameter R are determined so that r / R is not less than 0.25 and not more than 0.75, when the tube is turned on compared to the conventional tube The convection layer generated between the bulb and the filament body can be made thin, the amount of evaporation of the filament body constituent material can be suppressed, and the temperature rise of the bulb and the filament body can be suppressed. It is possible to prevent the body from being disconnected, to suppress blackening of the valve inner surface caused by the evaporated filament body constituent material adhering to the valve, and to prevent damage to the valve. Therefore, the life of the tube can be extended as compared with the conventional tube.

The above effect can be similarly obtained when a reflecting mirror is provided on the tube, and the central axis in the longitudinal direction of the bulb of the tube and the optical axis of the reflecting mirror are positioned on substantially the same axis.
Further, it is a tube that is incorporated in the reflecting mirror part of the illumination device, the tube having a bulb and a filament body disposed inside the bulb, and the filament body is formed by the tube bulb having the above-described configuration. When incorporated in the reflector portion, the central axis in the longitudinal direction is positioned substantially on the optical axis of the reflector portion, and the central axis in the longitudinal direction is around the central filament element. At least three peripheral filament elements arranged so as to be substantially parallel to the longitudinal central axis of the central filament element, wherein the peripheral filament element is a longitudinal central axis of each of the peripheral filament elements And the central axis in the longitudinal direction of the central filament element when connecting the intersections where the plane perpendicular to the central axis in the longitudinal direction of the central filament element intersects each other Are arranged so as to form a substantially regular polygon with the center of gravity (centroid) as the center of gravity, and the maximum inner diameter of the portion of the bulb where the filament body is located is R [mm], and the filament body When the maximum outer diameter is r [mm], the above effect can be obtained in the same manner even when the configuration satisfies the relational expression of 0.25 ≦ r / R ≦ 0.75.

  And a tube having a concave reflecting mirror and a bulb disposed in the reflecting mirror and having a bulb and a filament body provided in the bulb, the filament body having a longitudinal center. A linear central filament element whose axis is substantially located on the optical axis of the reflector, and a central axis in the longitudinal direction is substantially parallel to the central axis in the longitudinal direction of the central filament element around the central filament element. At least three peripheral filament elements arranged such that the peripheral filament elements are in a longitudinal central axis of each of the peripheral filament elements and a longitudinal central axis of the central filament element. When connecting intersections that intersect with a perpendicular plane, a substantially regular polygon is formed with the center of gravity (centroid) at the point on the central axis in the longitudinal direction of the central filament element. When the maximum inner diameter of the portion of the bulb where the filament body is located is R [mm] and the maximum outer diameter of the filament body is r [mm], 0.25 The above effect can be obtained in the same manner even when the relational expression ≦ r / R ≦ 0.75 is satisfied.

When the ratio of the coil length L _C [mm] of the central filament element to the coil length L _S [mm] of the peripheral filament element is Ls / Lc, L _S / L _C is 0.2 or more and 0.9. When Lc and Ls are determined to be as follows, the coil length Ls of the peripheral filament element can be made relatively shorter than the coil length Lc of the central filament element, or the coil of the central filament element Since the length Lc can be made relatively longer than the coil length Ls of the peripheral filament element, the central illuminance is improved and the central illuminance is set to the maximum illuminance compared to the conventional tube with a reflector. The beam angle can be narrowed, the center illuminance can be increased, and good light distribution characteristics can be realized especially with the narrow-angle beam angle type. It can be.

If the distance D ₁ of the between the central filament element and each of the peripheral filaments element is set to 0.1 [mm] or more 2.2 [mm] or less, of the filament assemblies in the central illuminance contribution region The density can be increased, and since arc discharge can be suppressed between the central filament element and the peripheral filament elements constituting the filament body, the central illuminance can be improved and each filament can be improved. It is preferable because the element can be prevented from being disconnected and contribute to a long life.

An effect similar to the above effect can be obtained also in the illumination device provided with any of the above-mentioned tube bulbs.
Any of the above effects can be obtained in the same manner even if any of the above-mentioned reflector-equipped tubes is incorporated in a lighting device.

(Embodiment 1)
The best mode for carrying out the present invention will be described below with reference to the drawings.
FIG. 1 is a schematic configuration diagram in which a part of a lighting device in which a halogen bulb is incorporated in a lighting fixture including a reflecting mirror in the first embodiment is cut away.
As shown in FIG. 1, the illumination device 110 according to the first embodiment of the present invention is mainly used for general illumination such as a spotlight as an example, and light is emitted from an opening 111 and is internally provided. A cylindrical lighting fixture 113 in which the reflecting mirror 112 is housed, and a halogen bulb 114 with a rated power of 65 [W] (rated voltage 110 [V]) incorporated in the reflecting mirror 112 are provided.

The rated voltage of the halogen bulb 114 is not limited to the above voltage, and may be set within a range of 100 [V] to 250 [V].
The central axis X ₆ in the longitudinal direction of the valve 115 of the halogen lamp 114 to the optical axis Y ₆ of the reflector 112 are substantially positioned on the same axis.
A receiving tool (not shown) to which a base 116 (see FIG. 2) of the halogen light bulb 114 is attached is provided at the bottom of the lighting fixture 113.

A front glass 118 is attached to the reflecting mirror 112, and a reflecting surface 119 of a rotating body made of a spheroid outer peripheral surface or a rotating paraboloid surface is formed on the inner surface. In addition to a metal film such as aluminum or chromium, a multilayer interference film made of silicon dioxide (SiO ₂ ), titanium dioxide (TiO ₂ ), magnesium fluoride (MgF), zinc sulfide (ZnS) or the like is formed on the reflecting surface 119. Is formed. Moreover, you may form a facet in this reflective surface as needed.

In the illumination device 110, in order to replace the halogen light bulb 114, the reflecting mirror 112 can be attached to and detached from the lighting fixture 113. In addition, the reflecting mirror 112 itself is fixed to the lighting fixture 113, and the front glass 118 is the reflecting mirror. 112 may be removable.
Moreover, the lighting fixture 113 itself is not limited to a cylindrical shape, and various known shapes can be used.

Since the lighting fixture 113 itself including the reflecting mirror 112 is publicly known, other details will be omitted, and the details of the halogen bulb 114 which is the main characteristic part of the present invention will be described. Therefore, as lighting fixtures, various known types of lighting fixtures (including those for studios) other than the lighting fixture 113 shown in FIG. 1 can be used.
FIG. 2 is a schematic configuration diagram in which a part of a halogen bulb scheduled to be incorporated in the lighting device is cut out in the first embodiment.

As shown in FIG. 2, the halogen light bulb 114 includes a bulb 115 made of quartz glass, hard glass, or the like, and an E-shaped base 116 fixed to the sealing portion 120 side of the bulb 115 with an adhesive 121, for example. ing.
The bulb 115 is formed by a chip-off portion 122 which is a residual mark of sealing cut, a light-emitting portion 123 having a substantially spheroidal shape, a reduced diameter portion 124, a substantially cylindrical tube portion 125, and a known pinch seal method. The sealing portions 120 are formed so as to be successively connected. Of the outer surface of the bulb 115, a visible light transmitting infrared reflecting film 126 is formed on the outer surfaces of the chip-off part 122, the light emitting part 123, and the reduced diameter part 124.

The "substantially spheroid shape" as used herein includes not only the complete spheroid shape but also the case where it deviates from the complete spheroid shape due to variations in glass processing. I mean.
The shape of the bulb 115 is not limited to the tip-off portion 122, the substantially spheroidal light-emitting portion 123, the reduced-diameter portion 124, the cylindrical portion 125, and the sealing portion 120, which are successively formed. Off part (may be absent in some cases), light bulb with substantially spheroidal shape, reduced diameter part and sealed part formed in sequence, chip off part (may not be in some cases) A bulb formed by sequentially connecting a light-emitting part and a sealing part having a substantially spheroidal shape, or a chip-off part (may be omitted in some cases), a light-emitting part and a sealing part having a substantially cylindrical shape being successively connected. Various known valve shapes such as formed valves can be used. Of course, instead of the above-described substantially spheroidal shape, the light emitting portion may have a substantially spherical shape or a substantially composite ellipsoidal shape.

A filament body 127 is provided in the light emitting portion 123, and a predetermined amount of a halogen substance and a rare gas, or a halogen substance, a rare gas, and a nitrogen gas are sealed therein.
One end of an internal lead wire 128 made of tungsten, for example, is electrically and mechanically connected to the filament body 127, respectively. The other end portion of the internal lead wire 128 is connected to one end portion of the external lead wire 130 via a molybdenum metal foil 129 sealed in the sealing portion 120. The other end of the external lead wire 130 is led out of the bulb 115 and is electrically connected to the terminal portions 117a and 117b of the base 116, respectively. In addition, a support wire 228 for realizing the arrangement described below of the filament elements constituting the filament body 127 has one end supported by the stem glass 328 and extended.

FIG. 3 is a schematic perspective view showing a lead wire and a support wire that support the filament body provided in the halogen light bulb in the first embodiment and energize the filament body, and FIG. 4 shows the halogen light bulb in the first embodiment. FIG. 5 is a schematic perspective view showing a filament body provided in the bulb of FIG. 1, a lead wire that supports and energizes the filament body, and a support wire, and FIG. 5 shows the filament body provided in the halogen bulb in Embodiment 1. it is a schematic cross-sectional view taken along the valve axis X ₆ direction perpendicular to the direction.

As shown in FIGS. 3 to 5, the filament body 127 includes a plurality of, for example, four filament elements (coils) 131, 132, 133, and 134. These four filament elements (coils) 131, 132, 133, and 134 are electrically connected in series. Further, the filament body 127 is at a position where the position with respect to the reflecting mirror 112 includes the focal point F ₆ of the reflecting mirror 112. That is, the filament 127, four filament elements (coils) 131, 132, 133 a pillar body likened integrally with when a (portion indicated by a broken line in FIG. 5), the focal point _{F 6} its pillars Located in or on the body. Thus, when viewed in the actual filament assembly 127, the focal point _{F 6} filament element (coil) 131, 132, 133 and 134 of the inner or on the surface or each coil (131, 132), (131, 133), It is located between (131,134), (132,133), (132,134), (133,134). In the present embodiment, the center point of the filament body 127 is substantially located on the focal point F _{6 of the} reflecting mirror 112. However, as shown in FIG. 5, the point F ₀ on the surface of the filament body may be located on the focal point F ₆ .

In FIG. 1, filament elements (coils) 131, 132, 133, and 134 are integrated, and the filament body 127 is schematically shown as one column body. FIG. 5 schematically shows only the outlines of the filament elements (coils) 131, 132, 133, and 134.
Each filament element (coil) 131, 132, 133, 134 is a single-wound coil that is made of tungsten and extends straight in a substantially straight line, and has a substantially circular outline when viewed from the longitudinal direction thereof. Shape, preferably a flat shape, for example, a rectangular shape, or a substantially track shape (oval shape) composed of two semicircular portions facing each other so that the curved portion faces outward and two parallel straight portions connecting them. Shape).

When the filament elements (coils) 131, 132, 133, and 134 are formed so that the contour when viewed from the longitudinal direction has a substantially track shape (oval shape), the coil length in the longitudinal direction of the conventional coil is obtained. In comparison, the coil length Ls ₄ (see FIG. 4) in the longitudinal direction of each filament element (coil) 131, 132, 133, 134 is shortened.
However, the “substantially circular shape” mentioned here includes a perfect circle, as well as a circle close to a perfect circle whose shape is slightly different from the perfect circle due to manufacturing variations, processing accuracy, etc. Is also included. That is, “a shape different from a substantially circular shape” means a shape that is different from a perfect circle or a circle close to the true circle. In addition, “straightly straightened” means that the coil after being wound around the core wire is not actively bent, and has been bent due to manufacturing variations in manufacturing, accuracy of processing, etc. Including cases. However, the single-winding coil extending straightly in a straight line referred to here includes, of course, a single-winding coil wound straight in a straight line, for example, the single-winding coil in the longitudinal direction of the coil. And the like that are twisted with the central axis as the rotation axis.

  Further, in these filament elements (coils) 131, 132, 133, and 134, the contour when viewed from the longitudinal direction is different from the substantially circular shape, in addition to the substantially track shape described above, a substantially elliptical shape and a substantially flat shape. An elliptical shape, a substantially polygonal shape, or the like may be used, and it is not particularly limited to its outline (except for a substantially circular shape). These contours can be realized by appropriately changing the number of core wires around which the strands are wound, the shape of the core wires, the arrangement of the core wires, and the like in the filament element (coil) manufacturing process.

Further, when the filament elements (coils) 131, 132, 133, and 134 are formed so that the contour when viewed from the longitudinal direction has a substantially track shape (oval shape), these filament elements (coils) 131, 132, 133, and 134 are tungsten wires having a wire diameter (element wire diameter) of 0.015 [mm] to 0.100 [mm], for example, 0.040 [mm], and a core wire having a diameter of 0.4 [mm]. Are wound around a parallel arrangement of two pieces at a pitch of 0.05 [mm] to 0.07 [mm]. Accordingly, the radius of the semicircular portion is 0.24 [mm], and the length of the straight portion is 0.4 [mm]. Each filament element (coil) 131, 132, 133, 134 has a coil length L _s4 (see FIG. 4) of 4 [mm], a maximum width W _max (see FIG. 5) of 0.88 [mm], The minimum width W _min (see FIG. 5) is 0.48 [mm].

The filament elements (coils) 131, 132, 133, and 134 may be manufactured by winding the tungsten wires around the core wires arranged in parallel and adjacently at the pitch. In such a case, the coil length Ls ₄ (see FIG. 4) of each filament element (coil) 131, 132, 133, 134 is further shortened, and a region contributing to the central illuminance in the reflecting mirror 112 (hereinafter referred to as “central illuminance”). The ratio of the filament body 127 in the “contribution region”) can be further improved, which is preferable.

Thus, as the maximum width Wmax of the filament element (coil) in the outline of the filament element (coil) 131, 132, 133, 134 viewed from the longitudinal direction is increased, each filament element (coil) 131, 132, The coil length Ls ₄ of 133 and 134 can be shortened, but at the same time, the gap between the filament elements (coils) is narrowed and the vibration resistance, impact resistance and life are reduced. It is more preferable to determine the maximum width Wmax as long as the impact and life are not impaired.

  Here, a plurality of filament elements (coils) 131, 132, 133, and 134 constituting the filament body 127 are regarded as one coil, that is, a filament body (enclosed by a broken line in FIGS. 4 and 5), and a reflecting mirror. 112 so that one coil (filament body) in the combination with 112 falls within a region (hereinafter simply referred to as “center illuminance contribution region”) that greatly contributes to the central illuminance in the reflector 112. The shape, that is, the shape (excluding a substantially circular shape), dimension, and arrangement (including the interval between the coils (filament elements)) of each filament element (coil) 131, 132, 133, 134 is appropriately determined. Therefore, if the filament body 127 falls within the central illumination contribution region, the dimensions and shape of the filament body 127, that is, the shapes (excluding the substantially circular shape), dimensions, and dimensions of the filament elements (coils) 131, 132, 133, and 134, The arrangement is not limited to that described above. However, as described above, generally, the wire length and wire diameter of the tungsten wire constituting the filament body 127 are substantially determined according to the rated voltage, rated power, and rated life time (for example, 3000 hours) of the halogen bulb 114. Therefore, the shape (excluding the substantially circular shape) and dimensions of the filament elements (coils) 131, 132, 133, and 134 are appropriately determined within the range of the strand length and strand diameter. As an example, the tungsten wire has a wire length of, for example, 420 [mm] to 480 [mm] and a wire diameter of, for example, 0.05 [mm] to 0.06 [though] used for a halogen light bulb with a rated power of 65 [W]. mm], the wire length of the tungsten wire used for the halogen light bulb with the rated power of 20 [W] is, for example, 250 [mm] to 300 [mm], and the wire diameter is 0.02 [mm] to 0.03 [mm]. The tungsten wire has a wire length of, for example, 540 [mm] to 620 [mm] and a wire diameter of 0.07 [mm] to 0.08 [mm], although it is used for a halogen light bulb with a rated power of 100 [W]. It is.

Next, the positional relationship between the filament elements (coils) 131, 132, 133, and 134 is as shown in FIGS.
That is, as shown in FIG. 4, one end face of each filament element (coil) 131, 132, 133, 134 is on substantially the same plane. Further, since the coil lengths L _{s4 of} the filament elements (coils) 131, 132, 133, and ₁₃₄ are all the same, the other end surfaces of the filament elements (coils) 131, 132, 133, and 134 are also substantially on the same plane. is there. In particular, among the end surfaces of the filament elements (coils) 131, 132, 133, and 134, it is preferable that the end surfaces opposite to the sealing portion 120 are respectively located on substantially the same plane. Thereby, the illumination intensity to the irradiation surface irradiated by each filament element (coil) 131,132,133,134 can be made uniform, and a uniform light distribution curve can be obtained.

Further, as shown in FIG. 5, when each filament element (coil) 131, 132, 133, 134 is viewed from the longitudinal direction, the filament element (coil) 131 has a central axis a _{41 in the} longitudinal direction of the bulb 115. Located on the longitudinal central axis X ₆ , the longitudinal central axes a ₄₁ , a ₄₂ , a ₄₃ , a _{44 of the} filament elements (coils) 131, 132, 133, 134 are in the longitudinal direction of the bulb 115. it is parallel to the central axis X ₆ in. The filament element (coil) 132 has, in a plane perpendicular to the coil axis direction, a center line b ₄₂ passing through the centroid across the maximum width portion and straddling the Width of the filament element (coil) 131 across the maximum width portion. The distance r ₄ between the longitudinal center axis a ₄₂ and the longitudinal center axis a ₄₁ of the filament element (coil) 131 is 0.88 [mm], which is parallel to the passing center line b ₄₁ . It is arranged at the position.

The filament element (coil) 133 crosses the maximum width portion of the filament element (coil) 131 and the center line b ₄₃ passing through the centroid across the maximum width portion in a plane perpendicular to the coil axis direction. as the center line _{b 41} crosses the 30 [°] through, yet the distance _{r 4} is 0 between the longitudinal central axis _{a 41} in the longitudinal direction of the central axis _{a 43} and the filament element (coil) 131. It is arranged at a position of 88 [mm]. The filament element (coil) 134 spans the maximum width portion of the filament element (coil) 131 and the center line b ₄₄ passing through the centroid across the maximum width portion in a plane perpendicular to the coil axis direction. as the center line _{b 41} crosses the 30 [°] through, yet the distance _{r 4} is 0 between the longitudinal central axis _{a 41} in the longitudinal direction of the central axis _{a 44} and the filament element (coil) 131. It is arranged at a position of 88 [mm]. A distance r ₅ between the central axis a _{43 of the} filament element (coil) 133 and the central axis a ₄₄ of the filament element (coil) 134 is 1.52 [mm].

Here, adjacent filament elements (coils) (131, 132), (131, 134), (132, 133), (132, 134), (133, 134) are used to obtain a compact filament body 127. Are as close as possible to each other. However, if adjacent filament elements (coils) (131, 132), (131, 134), (132, 133), (132, 134), (133, 134) are too close, When vibration is applied to the halogen bulb 114, adjacent filament elements (coils) (131, 132), (131, 134), (132, 133), (132, 134), (133, 134) vibrate. There is a risk of contact and short circuit. The filament elements (coils) (131, 132), (131, 134), (132, 133), (132, 134), and (133, 134) are most adjacent to each other than the other parts. However, since the temperature of the filament elements (coils) 131, 132, 133, and 134 becomes high, the tungsten wire tungsten is apt to evaporate, which may shorten the life. Therefore, even when vibration is applied to the halogen bulb 114 during lighting, adjacent filament elements (coils) (131, 132), (131, 134), (132, 133), (132, 134), (133) , along with 134) to prevent a short circuit in contact, in order to prevent life shortening, the distance _{r 4} is preferably in the 0.88 [mm] or more.
<< Effect of Lighting Device with Halogen Bulb Mounted in Embodiment 1 >>
As described above, according to the configuration of the illuminating device 110 according to the first embodiment of the present invention, since the single-winding coil is used first, vibration resistance can be increased as compared with the multiple-winding coil. The pitch can be made sufficiently smaller than the pitch of the multi-winding coil, and secondly, the single-winding coil is divided into a plurality of coils, and the coils (filament elements) 131, 132, 133, 134 are arranged in the longitudinal direction. Therefore, the filament elements (coils) 131, 132, 133, and 134 have different contours from the substantially circular shape, preferably flat shapes such as rectangular shapes and substantially track shapes (oval shapes). The axial length Ls _4, that is, the length of the filament body 127 in the longitudinal direction can be shortened. As a result, the ratio of the filament body 127 existing in the central illuminance contribution region in the reflecting mirror 112 can be increased, and the light collection efficiency can be improved.

Moreover, in the bulb 115, the filament element (coil) 131 is arranged on the optical axis Y ₆ of the reflecting mirror 112 (axis X _{6 of the} bulb 115) so that the longitudinal center axis _a41 is located. Compared with the case where the filament element (coil) is not arranged on the optical axis Y ₆ of the reflecting mirror 112 (axis X _{6 of the} bulb 115), the central illuminance can be improved and the light collection efficiency can be improved.

In the first embodiment described above, the case where the lighting fixture 113 (including the reflecting mirror 112) as shown in FIG. 1 is used has been described. However, various known lighting fixtures can be used instead of the lighting fixture 113. Even in the case of using (including a reflecting mirror), the same effect as described above can be obtained. In other words, according to the configuration of the halogen light bulb 114 used in the illumination device 110 according to the first embodiment of the present invention, the single coil is used first as described above, so that it is different from the multiple coil. The vibration can be increased, the pitch can be made sufficiently smaller than the pitch of the multiple coils, and secondly, the single coil is divided into a plurality of pieces, and the filament elements (coils) 131, 132, since the outer shape viewed 133 from the longitudinal direction is set to be a different shape than the substantially circular shape, it is possible to shorten sufficiently the optical axis Y ₆ direction as filaments 127, as a result In the state of being incorporated in the reflector of a known appropriate lighting fixture, the ratio of the filament body 127 existing in the central illuminance contribution region in the reflector is increased. The light collection efficiency can be improved.
<Evaluation test>
Next, the evaluation test for confirming the effect of the illuminating device 110 which is the 1st Embodiment of this invention was done. However, in order to simplify the test, the halogen bulb 114 (hereinafter simply referred to as “the product A of the present invention”) is not a lighting device itself, but a known halogen bulb with a reflecting mirror (manufactured by Matsushita Electric Industrial Co., Ltd., product number: JDR110V65WKN / 5E11) reflector (including front glass) (narrow angle type), another known halogen lamp with reflector (Matsushita Electric Industrial Co., Ltd., product number: JDR110V65WKM / 5E11) reflector (including front glass) (Medium-angle type), and another known halogen bulb with a reflector (made by Matsushita Electric Industrial Co., Ltd., product number: JDR110V65WKW / 5E11) incorporated in a reflector (including front glass) (wide-angle type) An evaluation test was conducted.

  Then, five halogen bulbs with reflectors of each mirror angle are produced, and each of the produced halogen bulbs with reflectors is lit at rated power and rated voltage, and the distance from the halogen bulb with reflectors is 1 [m] away. The central illuminance [lx] on the irradiated surface was measured. Of course, the value of the central illuminance in this experiment is not the value as the lighting device, but is equivalent to the value as the lighting device.

  For comparison, the rated power of 65 [W] (rated voltage of 110 [rated voltage] used in the lighting device 110 according to the first embodiment of the present invention is used except that a triple-wound coil is used as the filament body. V]) 15 halogen bulbs (hereinafter referred to as “Comparative Product A”) having the same configuration as the halogen bulb 114 having a rated power of 65 [W] (rated voltage 110 [V]) are produced. Each of the comparative products A was incorporated into the same known reflecting mirror (including the front glass) as the product A of the present invention, and the central illuminance [lx] was measured.

  The triple-winding coil used had a strand length of 460 [mm], a strand diameter of 0.052 [mm], and a primary mandrel diameter of 0.12 [mm]. The primary coil pitch is 0.14 [mm], the secondary coil mandrel diameter is 0.28 [mm], the secondary coil pitch is 0.55 [mm], and the tertiary coil mandrel diameter is 1.2 [mm]. mm], and the pitch of the tertiary coil is 1.5 [mm].

Further, the value of the central illuminance [lx] described later indicates an average value of five samples. Furthermore, since “light collection efficiency” is defined as illuminance per power [lx / W] here, the contrast between the central illuminance of the product A of the present invention and the central illuminance of the comparative product A is substantially the product of the present invention. It becomes contrast with the condensing efficiency of A and the condensing efficiency of the comparative product A.
As a result of the experiment, the center illuminance of the product A of the present invention was 9390 [lx] for the narrow angle type, 5092 [lx] for the medium angle type, and 2072 [lx] for the wide angle type. The illuminance was 5587 [lx] for the narrow angle type, 3005 [lx] for the medium angle type, and 1421 [lx] for the wide angle type.

Thus, in the product A of the present invention, the central illuminance is 1.68 times that of the narrow angle type, 1.69 times that of the medium angle type, and 1.45 times that of the wide angle type, as compared with the comparative product A. I understand.
The beam angle of the product A of the present invention was almost the same as that of the comparative product A in each beam angle type.
Here, in this comparison, the halogen bulbs of the product A of the present invention and the product A of the comparison product A were lit with the same power (65 [W]), so the improvement rate of the illuminance is the light collection efficiency [lx / W]. This is consistent with the improvement rate. In other words, it was confirmed that the product A of the present invention improved the light collection efficiency over the comparative product A.
(Embodiment 2)
In the illumination device of the second embodiment, the configuration of the filament body is only different from that of the first embodiment, and thus other explanations are omitted.

FIG. 6 is a schematic perspective view showing a lead wire and a support wire that support the filament body provided in the halogen light bulb in the second embodiment and energize the filament body, and FIG. 7 shows the halogen light bulb in the second embodiment. FIG. 8 is a schematic perspective view showing a filament body provided in the bulb, a lead wire that supports the filament body and energizes the filament body, and FIG. 8 is a filament body provided in the halogen light bulb according to the second embodiment. which is a schematic cross-sectional view taken along the valve axis X ₆ direction perpendicular to the direction.

In the second embodiment, the filament body 136 has the three filament elements (coils) 131, 132, 133 used in the first embodiment as shown in FIGS. 7 and 8, and the three coils 131, 132, The arrangement of 133 is different from that shown in the first embodiment. The arrangement is as follows. That is, as shown in FIG. 7, the longitudinal center axes a ₄₁ , a ₄₂ , a _{43 of the} filament elements (coils) 131, 132, 133 are parallel to the longitudinal center axis X ₆ of the bulb 115, When the filament elements (coils) 131, 132, 133 are viewed from the longitudinal direction, the filament elements (coils) 131 are arranged such that the longitudinal central axis a ₄₁ overlaps the longitudinal central axis X ₆ of the bulb 115. The filament element (coil) 132 has a center line c ₄₂ passing through the centroid across the minimum width portion and a center line c passing over the minimum width portion of the filament element (coil) 131 and passing through the centroid. ₄₁ and is arranged to be substantially on the same axis, yet the central longitudinal axis a ₄ in the longitudinal direction of the central axis a ₄₂ and the filament element (coil) 131 Distance r ₆ are arranged in a position where the 0.88 [mm], the filament element (coil) 133, the filament element centerline c ₄₃ through its centroid across its minimum width portion between the (Coil) 131 is arranged so as to be on the same axis as the center line c ₄₁ across the minimum width portion of the (coil) 131 and passing through the centroid, and the longitudinal direction of the central axis a _{43 in the} longitudinal direction and the longitudinal direction of the filament element (coil) 131 Is disposed at a position where the distance r _{7 from} the center axis a ₄₁ of the lens is 0.88 [mm].

The center lines c ₄₁ , c ₄₂ , c ₄₃ pass through the longitudinal central axes a ₄₁ , a ₄₂ , a ₄₃ of the filament elements (coils) 131, 132, 133, and the axes a ₄₁ , a _{43 In the} plane perpendicular to ₄₂ , a ₄₃ , the straight line intersects the center lines b ₄₁ , b ₄₂ , b ₄₃ perpendicular to the center lines b ₄₁ , b ₄₂ , b ₄₃ across the maximum width portions of the filament elements (coils) 131, 132, 133.

Although not shown, when the core wire diameter 0.4 [mm] is 100 [%], a filament element (coil) is formed using a core wire whose diameter is increased within a range of 110 [%] to 200 [%], for example. May be produced. In such a case, the coil length Ls ₄ in the longitudinal direction of the filament elements (coils) 131, 132, 133 is further shortened, and the ratio of the filament elements (coils) 131, 132, 133 occupying in the central illuminance contribution region is increased. ,preferable. In this case, the gap between the filament elements (coils) 131, 132, 133 is narrowed, and there is a risk that the impact resistance, earthquake resistance, and life may be reduced. More preferably, the gap is adjusted so as to widen.
<< Effect of Lighting Device with Halogen Bulb in Embodiment 2 >>
In the illuminating device according to the second embodiment, compared to the first embodiment, in the filament body 136, the filament element (coil) 131 on the optical axis Y6 of the reflecting mirror 112 (the central axis X6 of the bulb 115) and the axes thereof are Since the number of parallel filament elements (coils) is reduced, the light emitted from the filament element (coil) 131 on the optical axis Y6 of the reflecting mirror 112 (the central axis X6 of the bulb 115) is converted into the filament element (coil). The light is not blocked by the filament elements (coils) arranged around 131, and can contribute to the improvement of the central illuminance, and the light collection efficiency can be improved.

Furthermore, in the illumination device according to the second embodiment, the number of filament elements (coils) in the filament body is reduced as compared with the first embodiment, so that the gap between the filament elements (coils) can be increased. Impact resistance, vibration resistance and life can be improved.
In addition, in the illumination device according to the second embodiment, the filament elements (coils) 131, 132, 133 are provided in the bulb 115 so that the axes of the filament elements (coils) 131, 132, 133 are arranged on the same plane. Can be made uniform.

<Evaluation test>
{Central illuminance (light collection efficiency) comparison test}
The central illuminance of the illumination device 110 provided with the filament body 136 according to the second embodiment of the present invention is improved as compared with that of the illumination device 110 provided with the filament body 126 according to the first embodiment. A comparative test was conducted to confirm.
(Filament element (coil) dimensions)
Coil wire diameter: 0.053 [mm]
Coil wire length: 463 [mm]
Total coil length: 5.5 [mm]
Coil pitch (coil wire center axis distance): 0.074 [mm]
Coil cross section outline: Track shape (oval shape)
Maximum coil width (Wmax): 1.0 [mm]
Coil minimum width (Wmin): 0.5 [mm]
(Example 1) The filament body of Example 1 includes three filament elements (coils), and each filament element (coil) is arranged as shown in Embodiment 2 and has a length. It is 5.5 [mm].

(Comparative Example 1) The filament body of Comparative Example 1 includes four filament elements (coils), and each filament element (coil) is arranged as shown in Embodiment 1 and has a length. It is 4.0 [mm].
(contents of the test)
For each of the filament body of Example 1 and the filament body of Comparative Example 1, a filament element (hereinafter referred to as “central filament element”) disposed on the optical axis of the reflector is fixed under the following conditions, and the center A simulation test was conducted to determine how the central illuminance changes with the variation in the inter-axis distance between the filament element (hereinafter referred to as the “peripheral filament element”) and the central filament element that surrounds the filament element. It was.
(Other test conditions)
Rated power: 65 [w]
Rated voltage: 110 [V]
Lamp luminous flux: 1100 [lm]
Reflector outer diameter: 50 [mm] (Reflector opening diameter: 41 [mm])
Reflector type: narrow angle type (beam angle: 10 [°], error tolerance: ± 2.5 [°])
(Test results)
The result of the simulation test is shown in FIG. As shown in FIG. 9, in each of Example 1 and Comparative Example 1, it can be confirmed that there is the above-mentioned inter-axis distance having a large central illuminance as compared with a halogen bulb using a conventional filament body. When Example 1 was compared with Comparative Example 1, it was confirmed that the central illuminance of Example 1 was larger than that of Comparative Example 1.

(Discussion)
From the above test results, since the luminous flux emitted from the central filament element is shielded by the peripheral filament element, in Comparative Example 1 where the number of peripheral filament elements is larger than that in Example 1, the central illuminance is lower than that in Example 1. It is thought.
Therefore, in the filament body, when the central filament element is arranged on the optical axis of the reflecting mirror and the peripheral filament element is arranged around it, the central illuminance decreases as the number of the peripheral filament elements is increased. It is thought that it shows a tendency.

{Optimum clearance evaluation test}
In the filament body 136 of the second embodiment, both the simulation test and the actual measurement test were performed in order to confirm the gap between the central filament element and the peripheral filament element that can maximize the center illuminance. .
Since the dimensions of the filament element and other test conditions are the same as those in the evaluation test, the description thereof is omitted.

(Contents of simulation test)
In the halogen light bulb having the filament body of Example 1 used in the evaluation test, the gap between the central filament element and the peripheral filament element was varied, and the central illuminance changing along with it was measured. A simulation test was conducted to find the optimum gap.

(Results of simulation test)
The result of the simulation test is shown in FIG. As shown in FIG. 10, when the gap between the filament elements is 0.015 [mm], the gap is lower than that of the halogen lamp provided with the conventional filament body, but the gap is 0.02 [mm] to 0.1 [mm]. mm], the central illuminance increases as compared to the conventional one, and the central illuminance increases as the gap increases, so that the gap between the filament elements is 0.1 [mm] to 0.2 [mm]. ], The central illuminance becomes maximum, and when the gap between the filament elements is 0.2 [mm] or more, the central illuminance decreases as the gap becomes larger. It was confirmed that the central illuminance was larger at 02 [mm] or more and 1.3 [mm] or less as compared with the halogen bulb provided with the conventional filament body.

(Consideration of simulation test results)
When the gap between the filament elements is as close as possible to 0 [mm], the light emitted from each coil is blocked by each coil, so the central illuminance is considered to be lower than the conventional one. The central illuminance is maximized when the gap between the filament elements is 0.1 [mm] or more and 0.2 [mm] or less. In the case of the gap, the ratio of the filament body existing in the central illuminance contribution region is as follows. When the gap exceeds 0.2 [mm], the proportion of filament bodies existing in the central illuminance contribution region gradually decreases, and as a result, the gap exceeds 1.3 [mm]. At that time, the central illuminance is considered to be lower than the conventional one.

Therefore, under the restriction of the rated voltage and the like, theoretically, if the gap between the filament elements is 0.02 [mm] or more and 1.3 [mm] or less, the central illuminance is increased and the light is condensed as compared with the conventional one. It is thought that efficiency can be improved.
(Contents of actual test)
In the halogen light bulb having the filament body of Example 1 used in the evaluation test, the gap between the central filament element and the peripheral filament element was changed, and the central illuminance changing along with it was measured. An actual measurement test was conducted to find the optimum gap to be obtained. At the same time, in order to find the optimum gap at which a desired beam angle can be obtained, the beam angle that varies with the gap was actually measured while the gap was varied.
However, in order to simplify the test, not a lighting device itself but a known halogen bulb (Matsushita Electric Industrial Co., Ltd., product number: JDR110V65WKN / 5E11, mirror outermost diameter: 50 [mm], mirror opening diameter: 41 [ mm]), the filament body was replaced with the filament body according to the comparative test, and a comparative test was performed.

  In the comparative test, the filament bodies of the samples were all set with a wire diameter of 0.053 [mm], a wire length of 463 [mm], and a pitch of 0.074 [mm], and wound with tungsten. The filament element has a substantially track shape (oval shape) in a plane perpendicular to the axis, and the maximum width Wmax is 1 [mm] and the minimum width Wmin is 0. .5 [mm] is set.

(Result of measurement test)
FIG. 11 shows the result of the actual measurement test showing the relationship between the gap between the filament elements and the central illuminance, and FIG. 12 shows the result of the actual measurement test showing the relationship between the gap between the filament elements and the beam angle.
As can be seen from FIG. 11, when the gap is less than 0.3 [mm], arc discharge occurs between the filament elements, and a short circuit occurs, so that the central illuminance cannot be measured. When the gap is 0.3 [mm] or more and less than 1.25 [mm], the central illuminance increases compared to the conventional one, and when the gap is 1.25 [mm] or more, the central illuminance is lower than the conventional one. became.

  As can be seen from FIG. 12, when the gap is less than 0.3 [mm], the beam angle cannot be measured for the above reason, and the gap is 0.3 [mm] or more and 0.75 [mm]. In the following, the measured beam angle is within the set beam angle standard (7.5 degrees or more and 12.5 degrees or less), and when the gap is larger than 0.75 [mm] and 1.1 [mm] or less. When the measured beam angle is less than the lower limit (15 degrees) of the beam angle generally called the medium angle type and the gap is larger than 1.1 [mm], the measured beam angle is generally the medium angle type. It was within the range of the beam angle called.

(Consideration on the result of actual measurement test)
From the above test results, in order to satisfy the set beam angle standard (7.5 degrees or more and 12.5 degrees or less) under the constraints of the rated voltage, etc., and to increase the central illuminance and improve the light collection efficiency, The gap is preferably set to 0.3 [mm] or more and 0.75 [mm] or less. In addition, if it exceeds the set standard (7.5 degrees or more and 12.5 degrees or less) and may be less than the lower limit of the beam angle generally called a medium angle type, the gap is set to 0.3 [mm] or more and 1 .1 [mm] or less may be set.

{Center illuminance and light distribution characteristics evaluation test}
An evaluation test was performed to confirm that the configuration of the filament body 136 in the second embodiment can increase the central illuminance and make the light distribution uniform.
Since the coil wire diameter, coil wire length, and other conditions are as shown in the central illuminance (light collection efficiency) comparison test, description thereof is omitted here.

Samples prepared in the evaluation test are as follows.
FIG. 13 is a schematic configuration diagram schematically showing a coil arrangement in a plane perpendicular to the coil axis for each sample used in the evaluation test.
(Comparative example 1) Fig.13 (a) is the schematic sectional drawing which cut | disconnected the filament body of the comparative example 1 in the plane perpendicular | vertical to the axis | shaft of a secondary coil. As shown in FIG. 13 (a), the filament body of Comparative Example 1 is a so-called double-winding coil, and more specifically, a primary coil obtained by winding the filament body in a spiral shape is further wound to form a secondary coil. Is forming.

  (Comparative example 2) FIG.13 (b) is sectional drawing which cut | disconnected the filament body of the comparative example 2 in the plane perpendicular | vertical to the central axis. As shown in FIG. 13 (b), in the filament body of Comparative Example 2, four filament elements (coils) are provided, and a substantially track (oval) coil (filament element) in a plane perpendicular to the coil winding axis. ) Are arranged in four directions, the X axis spans the maximum width of the two filament elements (coils), and the Y axis straddles the maximum width of the remaining two filament elements (coils). Four filament elements are arranged so that a point perpendicular to the axis and the optical axis of the reflecting mirror overlap.

  (Comparative example 3) FIG.13 (c) is sectional drawing which cut | disconnected the filament body of the comparative example 3 in the plane perpendicular | vertical to the central axis. As shown in FIG. 13 (c), the filament body of Comparative Example 3 is 45 [about the axis perpendicular to the X and Y axes on the plane perpendicular to the coil winding axis. °] so that the optical axis of the reflecting mirror is arranged in the minimum gap between adjacent coils (filament elements) in which the center line passing through the orthogonal point and straddling the maximum width portion is arranged at an angle of 45 °. In other words, the central axis of the filament body is arranged so as to deviate from the optical axis.

  (Comparative example 4) FIG.13 (d) is the schematic sectional drawing which cut | disconnected the filament body of the comparative example 4 in the plane perpendicular | vertical to the central axis. As shown in FIG. 13 (d), in the filament body of Comparative Example 4, three filament elements (coils) are provided, and a substantially track (oval) coil (filament element) in a plane perpendicular to the coil winding axis. ) Are arranged so as to form a right-angled isosceles triangle when connecting the central axes of the filament elements (coils), and the intersection of the isosceles overlaps the optical axis of the reflecting mirror.

  (Example 1) FIG.13 (e) is sectional drawing which cut | disconnected the filament body of Example 1 in the plane perpendicular | vertical to the central axis. As shown in FIG. 13 (e), the filament body of Example 1 is the same as the filament body shown in Embodiment 1, and in this filament body, two filament elements in a plane perpendicular to the coil winding axis. (Coil) 131 and 132 are arranged so that the center line straddling the shortest width overlaps with the Y axis, the Y axis and the X axis are orthogonal, and the orthogonal point and the optical axis of the reflecting mirror overlap. Yes.

  (Example 2) FIG.13 (f) is sectional drawing which cut | disconnected the filament body of Example 2 in the plane perpendicular | vertical to the central axis. As shown in FIG. 13 (f), the filament body of Example 2 is the same as the filament body shown in Embodiment 2, and in this filament body, three filament elements in a plane perpendicular to the coil winding axis. (Coils) A center line straddling the minimum width part of each of 131, 132, 133 is arranged on the X axis, a center line straddling the maximum width part of the filament element 131 is arranged on the Y axis, and the X axis and the Y axis The axes are orthogonal to each other, and the orthogonal point and the optical axis of the reflecting mirror overlap each other.

  (Example 3) FIG.13 (g) is sectional drawing which cut | disconnected the filament body of Example 3 in the plane perpendicular | vertical to the central axis. As shown in FIG. 13 (g), the filament body of Example 3 is different from the filament body of Example 2 in the ratio between the maximum width and the minimum width of the filament element (coil) in a plane perpendicular to the coil winding axis. Therefore, other description is omitted. Each filament element constituting the filament body is formed so that the ratio of the maximum width to the minimum width is 3: 1 in a plane perpendicular to the coil winding axis.

(Contents of evaluation test)
Each of the above samples is turned on under the above-described conditions, the central illuminance at the irradiation surface 1 [m] away from the light source is measured, the illuminance ratio of each sample is obtained with reference to the central illuminance of Comparative Example 1, and FIG. The beam angles at the irradiation surfaces corresponding to the X-axis and Y-axis indicated by 13 were measured, and the uniformity of light distribution on the irradiation surface was evaluated from the measurement results. The evaluation criteria are as follows. That is, the beam angle in the X axis and the Y axis is 7.5 degrees or more and 12.5 degrees or less, and the difference from the other beam angle with respect to the beam angle in one of the X axis and the Y axis is determined. When calculated, when the difference was 10% or less of the narrower beam angle, it was determined that the uniformity of light distribution on the irradiated surface was good.

  (Results of evaluation test)

  The results of the evaluation test are shown in Table 1. As shown in Table 1, when the other samples were evaluated based on the central illuminance and beam angle of the sample of Comparative Example 1, the sample of Comparative Example 2 was between the X-axis beam angle and that of the Y-axis. Although there is no big difference, all the beam angles are significantly higher than the desired beam angle range of 7.5 degrees or more and 12.5 degrees or less, and the central illuminance is lower than that of Comparative Example 1 (the illuminance ratio is reduced). However, the light distribution near the concentric circle is obtained on the irradiated surface, but the central portion is dark and the light distribution cannot be made uniform.

In the sample of Comparative Example 3, the central illuminance is increased as compared with the sample of Comparative Example 1 (increased by 17% in terms of the illuminance ratio), but the Y-axis beam angle exceeds 12.5 degrees. In addition, it is larger than that of the X axis, and the light distribution is irregular on the irradiated surface, far from the concentric circles, and the light distribution cannot be made uniform.
In the sample of Comparative Example 4, the central illuminance is increased compared to the sample of Comparative Example 1 (increased by 40% in terms of illuminance ratio), but the X-axis beam angle is less than 7.5 degrees, and the Y-axis The light distribution is irregular on the irradiated surface, far from the concentric circles, and the light distribution cannot be made uniform.

On the other hand, in the sample of Example 1, the central illuminance increases compared to that of Comparative Example 1 (increased by 28% as the illuminance ratio), and the X-axis beam angle and the Y-axis do not differ greatly. Each beam angle falls within the range of 7.5 degrees or more and 12.5 degrees or less, so that a desired narrow beam angle can be obtained and the light distribution can be made uniform.
Further, in the sample of Example 2, the X-axis beam angle and that of the Y-axis do not differ greatly, and both of the beam angles are within the range of 7.5 degrees to 12.5 degrees, and a desired narrow beam angle is obtained. As a result, the central illuminance is larger than that of the first embodiment, and the light distribution can be made more uniform.

In the sample of Example 3, the X-axis beam angle and that of the Y-axis are not significantly different, and both beam angles are within the range of 7.5 degrees to 12.5 degrees, and a desired narrow beam angle is obtained. As a result, the central illuminance is larger than that of the second embodiment, and the light distribution can be made even more uniform.
(Discussion)
From the above results and discussion, in the sample of Example 2, the light emitted from the central filament element is blocked by the peripheral filament element by reducing the number of peripheral filament elements (coils) compared to the sample of Example 1. This can be suppressed, and as a result, the central illuminance can be increased.

In addition, from the above results and considerations in the sample of Comparative Example 4 and the sample of Example 2, it is possible to obtain a uniform light distribution by providing the filament element in the bulb so that the winding axis of the filament element is arranged on the same plane. It is thought that we were able to plan.
Further, from the above results and discussion, the maximum width is compared with the minimum width in the substantially track (oval) -shaped contour of each filament element in a plane perpendicular to the winding axis of the filament element as in the sample of Example 3. The length in the winding axis direction of each filament element can be shortened as the size increases, thereby increasing the proportion of filament bodies present in the central illuminance contribution region, and thus the central illuminance is further increased. Can be increased. However, as the maximum width is increased compared to the minimum width, the impact resistance, vibration resistance, and life expectancy will tend to decrease. It is considered that it is more preferable to enlarge it.
(Embodiment 3)
FIG. 14 is a schematic cross-sectional view of a halogen light bulb with a reflector in the third embodiment.

As shown in FIG. 14, the third rated power 65 in the form of implementation of [W] reflector with halogen bulb 137 (Rated voltage 110 [V]) of the present invention, the mirror diameter phi ₅ is 35 [mm] ˜100 [mm], for example, a concave reflecting mirror 138 having an outermost diameter of 50 [mm], a halogen light bulb 139 disposed inside the reflecting mirror 138, and, for example, E attached to the end of the reflecting mirror 138 And a base 140 having a shape.

A central axis X _{8 in} the longitudinal direction of the bulb 142 of the halogen bulb 139 substantially coincides with the optical axis Y ₇ of the reflecting mirror 138.
The reflecting mirror 138 is made of hard glass or quartz glass, and has an opening 143 for irradiating light at one end and a cylindrical neck 144 at the other end, and a spheroidal surface or a paraboloid on the inner surface. A reflecting surface 145 of a rotating body composed of a surface or the like is formed. The opening 143 is provided with a front glass 146 and is fixed by a known fastener (not shown). As a method for fixing the front glass 146, a known adhesive (not shown) may be used instead of the stopper, or a stopper and an adhesive may be used in combination. However, the front glass 146 is not necessarily provided.

A base 140 is provided outside the neck portion 144 so as to cover almost the entire neck portion 144, and is fixed thereto with an adhesive 147. On the other hand, the sealing portion 148 of the halogen light bulb 139 is inserted into the neck portion 144 and is similarly fixed through an adhesive 147.
In addition to a metal film such as aluminum or chromium, a multilayer interference film made of silicon dioxide (SiO ₂ ), titanium dioxide (TiO ₂ ), magnesium fluoride (MgF), zinc sulfide (ZnS), or the like is formed on the reflective surface 145. Has been. You may form a facet in the reflective surface 145 as needed.

  The halogen light bulb 139 includes a bulb 142 made of quartz glass, hard glass, or the like, and a light emitter 127 used in the halogen light bulb 114 in the lighting device 110 according to the thirteenth embodiment of the present invention. . That is, the halogen bulb 139 has the same configuration as the halogen bulb 114 except that the shape of the bulb 142 is different. Accordingly, the details of the configuration of the halogen bulb 139 will be described mainly on the differences from the configuration of the halogen bulb 114.

  For example, one end of an internal lead wire 128 made of tungsten is electrically and mechanically connected to both ends of the light emitter 127. The other end portion of the internal lead wire 128 is connected to one end portion of the external lead wire 130 through a metal foil 129 made of molybdenum that is sealed with a sealing portion 148. The other end of the external lead wire 130 is led out of the valve 142 and is electrically connected to the terminal portions 141a and 141b of the base 140, respectively.

  The bulb 142 includes a tip-off portion 149 which is a residual mark of sealing cut, a light emitting portion 150 having a substantially cylindrical shape with one end (end portion on the tip-off portion 148 side) tapered, and a known pinch seal method. The sealing portions 148 formed by the above are sequentially formed. Although the visible light transmitting infrared reflecting film is not formed on the outer surface of the bulb 142, a visible light transmitting infrared reflecting film may be formed on the outer surface of the light emitting unit 150 or the like as necessary.

  The shape of the bulb 142 is not limited to the tip-off portion 149, the substantially cylindrical light-emitting portion 150 whose one end is tapered, and the sealing portion 148, which are successively formed. (It may not exist depending on the case), bulb, tip-off part (may be absent in some cases), substantially spheroid Shaped light-emitting part, reduced-diameter part, tube part and sealed part are successively connected to each other, a tip-off part (may be omitted in some cases), a substantially spheroidal light-emitting part, reduced-diameter part And a valve in which a sealing part is successively formed, or a chip-off part (which may not be provided in some cases), a substantially spheroidal light emitting part, and a sealing part that are sequentially formed. Known in the art can be used various shapes of the valve. Of course, instead of the substantially spheroid shape, the light emitting portion may have a substantially spherical shape or a substantially complex ellipsoid shape.

As shown in FIGS. 4 and 5, the luminous body 127 has a plurality of, for example, four coils 131, 132, 133, and 134 arranged in parallel. These four coils 131, 132, 133, and 134 are electrically connected in series. In addition, the position of the light emitter 127 with respect to the reflecting mirror 138 is a position including the focal point F ₇ of the reflecting mirror 138. That is, the light emitter 127, a pillar body to resemble the four coils 131, 132, 133 integrally when the (portion indicated by the broken line in FIG. 4 and FIG. 5), the focal point _{F 7} its columnar body Located inside or on the surface. Thus, when viewed in the actual light emitter 127, the focal point _{F 7} is on the interior or surface of the coils 131, 132, 133 or each coil (131, 132), (131, 133), (131 and 134 ), (132, 133), (132, 134), (133, 134). In the example shown in FIG. 14, the center point of the light emitter 127 is substantially located on the focal point F _{7 of the} reflecting mirror 138. However, as shown in FIG. 5, the point F ₀ on the surface of the light emitter may be located on the focal point F ₇ .

In FIG. 14, the coils 131, 132, 133, and 134 are integrated, and the light emitter 127 is schematically shown as a single column.
Next, the positional relationship between the coils 131, 132, 133, and 134 is as shown in FIGS.
That is, as shown in FIG. 4, the one end surfaces of the coils 131, 132, 133, and 134 are substantially on the same plane. Further, since the coil lengths L _s4 of the coils 131, 132, 133, and ₁₃₄ are all the same, the other end surfaces of the coils 131, 132, 133, and 134 are also substantially on the same plane. In particular, among the end surfaces of the coils 131, 132, 133, and 134, it is preferable that the end surfaces opposite to the sealing portion 120 are located on substantially the same plane. Thereby, the illumination intensity to the irradiation surface irradiated by each coil 131,132,133,134 can be made uniform, and a uniform light distribution curve can be obtained.

In addition, as shown in FIG. 5, when each coil 131, 132, 133, 134 is viewed from the longitudinal direction, the coil 131 and the coil 133 are 1.2 with the central axis X ₇ in the longitudinal direction of the valve 142 interposed therebetween. The coils 131 and 133 are opposed to each other with an interval of [mm], and the long axis directions b ₄₁ (b ₄₃ ) of the coils 131 and 133 are substantially coincident with each other and intersect perpendicularly to the central axis X ₇ . . On the other hand, the coil 132 and the coil 134, opposed apart 0.4 [mm] across the longitudinal central axis _{X 7} of the valve 142, and the long axis direction _{b 42} of each coil 132, 134 ( b ₄₄ ) substantially coincides with each other and intersects with the central axis X ₇ perpendicularly. The major axis direction b ₄₁ (b ₄₃ ) and the major axis direction b ₄₂ (b ₄₄ ) intersect perpendicularly, and the intersection is on the central axis X ₇ .

  Here, adjacent coils (131, 132), (131, 134), (132, 133), (132, 134), (133, 134) are as long as possible in order to obtain a compact luminous body 127. It is preferred that they are close. However, if the adjacent coils (131, 132), (131, 134), (132, 133), (132, 134), (133, 134) are too close to each other, if the halogen bulb 114 is lit, When vibration is applied, adjacent coils (131, 132), (131, 134), (132, 133), (132, 134), (133, 134) may come into contact with each other and short circuit. is there. Further, the portions where the coils (131, 132), (131, 134), (132, 133), (132, 134), (133, 134) are most adjacent to each other are more coiled than the other portions. Since the temperatures of 132, 133, and 134 become high, the tungsten wire of the tungsten wire evaporates violently, which may shorten the life. Therefore, even when the halogen bulb 114 is vibrated during lighting, the adjacent coils (131, 132), (131, 134), (132, 133), (132, 134), (133, 134) are In order to prevent a short circuit due to contact, it is preferable that the thickness be 0.2 [mm] or more in order to prevent a short life.

As described above, according to the configuration of the reflector-equipped halogen light bulb 137 according to the third embodiment of the present invention, since the single-winding coil is used first, the vibration resistance is increased unlike the multiple-winding coil. The pitch can be made sufficiently smaller than the pitch of the multi-winding coil, and secondly, the single-winding coil is divided into a plurality of coils, and the coils 131, 132, 133, and 134 (FIG. 4, since the outer shape viewed see FIG. 5) from the longitudinal direction as a shape different from a substantially circular shape, it is possible to shorten sufficiently the optical axis Y ₇ direction as emitter 127. As a result, it is possible to increase the ratio of the light emitters 127 present in the region contributing to the central illuminance in the reflecting mirror 138, and to improve the light collection efficiency.

  In addition, since the central illuminance can be improved in this way, it is not necessary to improve the central illuminance by forming a visible light transmitting infrared reflecting film like a conventional halogen lamp with a reflector. A halogen light bulb with a reflector using a wound coil, in which a visible light transmitting infrared reflective film is formed on the outer surface of the bulb, can obtain a central illuminance substantially the same as the central illuminance. As a result, the cost of the visible light transmitting infrared reflecting film itself and the cost for the process can be reduced, and the process for forming the film can be omitted, so that the production efficiency can be greatly improved.

In the halogen bulb 137 with a reflector according to the third embodiment of the present invention described above, the filament body 136 of the second embodiment is used instead of the filament body 127 shown in FIGS. Even so, the same effects as described above can be obtained.
(Embodiment 4)
Next, in the lighting device according to the fourth embodiment of the present invention, the halogen lamp 137 with a reflector according to the third embodiment of the present invention is the first embodiment of the present invention shown in FIG. It has the same configuration as that of the lighting device 110 according to the first embodiment of the present invention except that it is attached to a lighting fixture 113 (excluding the reflecting mirror 112) of a certain lighting device 110.

As described above, according to the configuration of the lighting device according to the fourth embodiment of the present invention, since the single-winding coil is used first, unlike the multiple-winding coil, the vibration resistance can be increased. The pitch can be made sufficiently smaller than the pitch of the multi-winding coil, and secondly, the single-winding coil is divided into a plurality of coils, and the coils 131, 132, 133, and 134 (see FIGS. 4 and 5) are formed. since the outer shape when viewed from the longitudinal direction so that a shape different from a substantially circular shape, it is possible to shorten sufficiently the optical axis Y ₆ direction as emitter 127 (see FIG. 1). As a result, it is possible to increase the proportion of the light emitters 127 existing in the region contributing to the central illuminance in the reflecting mirror 138 (see FIG. 14), and to improve the light collection efficiency.

In the lighting device according to the fourth embodiment of the present invention described above, the filament body 136 used in the second embodiment is used instead of the filament body 127 shown in FIGS. 4 and 5. Even if it exists, the effect similar to the above can be acquired.
(Embodiment 5)
The best mode for carrying out the present invention will be described below with reference to the drawings.

As shown in FIG. 15, the halogen lamp 1 with a reflector having a rated power of 65 [W] (rated voltage 110 [V]) according to the first embodiment of the present invention includes a concave reflector 2 and A halogen light bulb 3 arranged inside the reflecting mirror 2 and an E-shaped base 4 attached to the end of the reflecting mirror 2 are provided.
In this embodiment, the mirror diameter phi ₁ of the reflecting mirror 2, 35 [mm] or more 100 [mm] as long or less, in the present embodiment, is set to 50 [mm].

A central axis X _{1 in} the longitudinal direction of the halogen bulb 3 substantially coincides with the optical axis Y ₁ of the reflecting mirror 2.
The reflecting mirror 2 is made of hard glass or quartz glass, and has an opening 5 for irradiating light at one end and a cylindrical neck 6 at the other end, and a spheroidal surface or a paraboloid on the inner surface. A reflecting surface 7 made of a surface or the like is formed. You may form a facet in the reflective surface 7 as needed.

A front glass 8 is provided in the opening 5 and is fixed by a known fastener (not shown), a known adhesive (not shown), or a combination thereof. However, the front glass 8 is not necessarily provided.
On the outside of the neck portion 6, a base 4 is provided so as to cover almost half of the neck portion 6, and is fixed via an adhesive 9. On the other hand, a sealing portion 12 of a halogen bulb 3 to be described later is inserted into the neck portion 6, and is similarly fixed via an adhesive 9.

In addition to a metal film such as aluminum or chromium, a multilayer interference film made of silicon dioxide (SiO ₂ ), titanium dioxide (TiO ₂ ), magnesium fluoride (MgF), zinc sulfide (ZnS) or the like is formed on the reflecting surface 7. Has been.
The halogen light bulb 3 is a quartz glass in which a chip-off portion 10 which is a residue of sealing cut, a substantially cylindrical light emitting portion 11, and a sealing portion 12 formed by a known pinch seal method are successively connected. And a bulb 13 made of hard glass or the like, and an assembly 18 in which a filament body 14 which is a light emitter, an internal lead wire 15, a metal foil 16 and an external lead wire 17 are sequentially connected.

A visible light transmitting infrared reflecting film may be formed on the outer surface of the bulb 13 as necessary.
In the light emitting section 11, the above-described filament body 14 is disposed, and a predetermined amount of each of a halogen substance and a rare gas is sealed. One end of an internal lead wire 15 made of tungsten, for example, is connected to both ends of the filament body 14. The other end portion of the internal lead wire 15 is connected to one end portion of the external lead wire 17 through a metal foil 16 made of molybdenum sealed in the sealing portion 12. The other end portion of the external lead wire 17 is led out of the valve 13 and is electrically connected to the terminal portions 4a and 4b of the base 4 respectively.

  As shown in FIGS. 16 and 17, the filament body 14 is composed of a plurality of single-winding coils extending linearly, each of which is made of, for example, tungsten, and each is electrically connected in series 1 It consists of one central filament element 19 and three peripheral filament elements 20, 21, 22. The wire diameter of the tungsten wire constituting the single winding coil is 0.015 [mm] to 0.100 [mm], for example 0.050 [mm].

16 and 17, the central filament element 19 and the peripheral filament elements 20, 21, and 22 are schematically depicted as cylindrical bodies, respectively.
The central filament element 19 has a longitudinal central axis a <b> ₁ substantially positioned on the optical axis Y <b> 1 of the reflecting mirror 2. The peripheral filament elements 20, 21, 22 are arranged around the central filament element 19 so that the longitudinal center axes b 1, c 1, d 1 are substantially parallel to the longitudinal center axis a 1 of the central filament element 19. ing. Further, as shown in FIG. 17, these three peripheral filament elements 20, 21, 22 are perpendicular to the longitudinal center axes b1, c1, d1 and the longitudinal center axis a1 of the center filament element 19, respectively. when connecting such arbitrary plane P ₁ and intersects the intersection, respectively, it is arranged a point on the central axis a1 longitudinal central filament element 19 so as to form a substantially equilateral triangle and the center of gravity ( "centroid") ing. That is, the distances D ₁ between the central filament element 19 and the respective peripheral filament elements 20, 21, 22 are all substantially equal, and one peripheral filament element 20 (21 or 22) and two adjacent peripheral areas. The distances D ₂ between the filament elements 21 and 22 (20, 22 or 20, 21) are substantially equal.

Here, the "are substantially position", it is preferable that the ideal center axis a1 is positioned completely on the optical axis Y ₁ of the reflecting mirror 2, the positioning accuracy in the manufacturing process practical due to variations, sometimes central axis a1 is shifted from the optical axis Y ₁ of the reflecting mirror 2, is meant to include also the case. Also, “substantially parallel” and “substantially equilateral triangle” are also made completely parallel by variation in assembly accuracy in the assembly process of the filament body 14, and it is difficult to form a perfect equilateral triangle. In some cases, the positional relationship and the shape deviate from a perfect equilateral triangle, and this also includes that case. The same applies to the distance D ₁ and the distance D ₂ being “substantially equal”.

Further, the center filament element 19 includes the position of the focal point F ₁ of the rotating body forming the reflecting surface 7 as shown in FIG. 16, and the center point A ₁ on the center axis a 1 of the center filament element 19 has a center point A _1. It is arranged so as to be opposite to the opening 5 from the position of the focal point F _1. In addition, the peripheral filament elements 20, 21, and 22 are based on this, and the peripheral filament elements 20, 21, and 22 are points F _b1 , F _c1 , and F _d1 in the reflecting mirror 2 described later (in FIG. 16, Center points B ₁ , C ₁ , D ₁ including the positions of the points F _b1 , F _c1 ) and on the central axes b ₁ , c ₁ , d _{1 of the} respective peripheral filament elements 20, 21, 22 (FIG. 16). Then, only the points B ₁ and C ₁ are shown) are arranged so as to be located on the opposite side of the opening 5 from the positions of the points F _b1 , F _c1 , and F _d1 . However, the points F _b1 , F _c1 , and F _d1 include the position of the focal point F ₁ of the rotating body that forms the reflecting surface 7 and intersect with the plane Q ₁ perpendicular to the optical axis Y ₁ of the reflecting mirror 2. , Points of intersection with the central axes b1, c1, and d1 are shown. As an example, the distance between the focal point F ₁ and the center point A ₁ is 2.35 [mm], and the distance between the points F _b1 , F _c1 , F _d1 and the center points B ₁ , C ₁ , D ₁ is as follows. Each distance is 1.21 [mm].

Here, it is preferable that the ends on the opening 5 side of the peripheral filament elements 20, 21, and 22 are positioned in substantially the same plane. Thereby, the illumination intensity to the irradiation surface irradiated by each peripheral filament element 20, 21, 22 can be made uniform, and a uniform light distribution curve can be obtained.
In such a filament body 14, the central filament element 19 and the peripheral filament elements 20, 21, and 22 are accommodated in one cylindrical body. Can be regarded as one integrated filament.

The coil lengths of the central filament element 19 and the peripheral filament elements 20, 21, 22 are L _C1 [mm] as the coil length of the central filament element 19, and L _S1 [mm] as the coil length of the peripheral filament elements 20, 21, 22 In this case, the relational expression 0.2 ≦ L _S1 / L _C1 ≦ 0.9 is set for the reason described later. However, the coil lengths L _S1 of the peripheral filament elements 20, 21, 22 are substantially equal to each other. Of course, “substantially equal” means that each coil length L _S1 varies due to variations in the coil manufacturing process as described above.

Generally, the length of the tungsten wire constituting the coil of the filament body 14 is determined according to the rated power of the halogen bulb 3. As an example, the tungsten wire used for the halogen light bulb 3 with a rated power of 65 [W] has a tungsten wire length of, for example, 420 [mm] to 480 [mm], and the tungsten wire used for the halogen light bulb 3 with a rated power of 20 [W]. The length of the tungsten wire used in the halogen light bulb 3 with a rated power of 100 [W] is, for example, 250 [mm] to 300 [mm], and the length of the tungsten wire is, for example, 540 [mm] to 620 [mm]. Therefore, the coil lengths L _C1 and L _S1 can be adjusted by appropriately changing the coil pitch (interval between adjacent coil portions) p and the maximum outer diameter R ₁ of the coil. As an example, in the case of the one used for the halogen light bulb 3 with a rated power of 65 [W], the pitch p of the single winding coil is 0.05 in both the central filament element 19 and the peripheral filament elements 20, 21, and 22. It is set in the range of [mm] to 0.07 [mm]. The maximum outer diameter R ₁ of the single-winding coil is set in the range of 0.5 [mm] to 1.2 [mm] in both the central filament element 19 and the peripheral filament elements 20, 21, and 22. ing.

The distance D ₁ of the between the central filament element 19 and each of the peripheral filaments elements 20, 21 are preferably set in a range of each 0.1 [mm] ~2.2 [mm] . As a result, the density of the filament body 14 in the central illuminance contribution region can be increased, the central illuminance can be made extremely high, and the central filament element 19 is turned on during lighting as compared with the conventional halogen bulb. It is possible to prevent arc discharge from occurring between the outer filament element 20 and the peripheral filament elements 20, 21 and 22, and disconnection of the central filament element 19 and the peripheral filament elements 20, 21 and 22 due to the arc discharge. On the other hand, when the distance D ₁ is less than 0.1 [mm], arc discharge occurs between the central filament element 19 and the peripheral filament elements 20, 21, 22 during lighting, and the central filament element 19 is generated by the arc discharge. Or the peripheral filament elements 20, 21, and 22 may be disconnected. Further, when the distance D ₁ exceeds 2.2 [mm], the density of the filament body 14 in the central illuminance contribution region becomes smaller than that in the conventional halogen light bulb, and the central illuminance can be made extremely sufficiently high. The peripheral filament elements 20, 21, and 22 may increase the illuminance in the peripheral area of the central portion on the irradiation surface.

  Here, as the coils constituting the central filament element 19 and the peripheral filament elements 20, 21 and 22, a double-winding coil and a triple-winding coil can be used in addition to the single-winding coil. Therefore, it is preferable to use a single-winding coil that can make the pitch p smaller than a double-winding coil or a triple-winding coil and can increase the density of the filament body 14 in the central illumination contribution region. .

Next, assuming that the coil length of the central filament element 19 is L _C1 [mm] and the coil lengths of the peripheral filament elements 20, 21, 22 are L _S1 [mm], 0.2 ≦ L _S1 / L _C1 ≦ 0. The reason why it is defined to satisfy the relational expression 9 will be described.
First, with respect to the halogen light bulb 1 with a reflector having the rated power of 65 [W], the coil length L _C1 of the central filament element 19 and the coil lengths L _S1 of the peripheral filament elements 20, 21 and 22 are variously shown in Table 2. Five pieces of each changed were produced. Then, is lit at a rated power which each was prepared, shown in the beam angle was examined (in degrees) and the center illuminance [lx], (the relationship between the L _{S1 /} L _C1 and the beam angle) Table 2 and FIG. 18 The following results were obtained. Further, as a typical light distribution curve, FIG. 19 shows a case where L _S1 / L _C1 = 0.9, and FIG. 20 shows a case where L _S1 / L _C1 = 0.6.

In each sample prepared, the central filament element 19 and the peripheral filament elements 20, 21 and 22 are each composed of a single wound coil, and the pitch p is 0.05 [mm] to 0.07 [mm], and the maximum outside. The _one having a diameter R ₁ of 0.65 [mm] was used. The distance D ₁ is 1.5 [mm].
In Table 2, “beam angle” indicates an average value of five samples. The beam angle of 10 degrees (allowable range: 7.5 degrees to 12.5 degrees), which is the mainstream of those currently on the market, was used as an evaluation standard.

  Further, “center illuminance” indicates an average value of five samples. Currently, a commercially available halogen bulb with a reflector (hereinafter referred to as “conventional product”) with a rated power of 65 [W] (rated voltage 110 [V]) with a beam angle of 10 degrees has a central illuminance of, for example, 6500 [cd]. ]. Therefore, as an evaluation standard, considering the demand from the market, etc., it is increased by about 10% with respect to the central illuminance of the conventional product (6500 [lx], 6500 [cd] in terms of central luminous intensity), that is, 7200 [lx] The evaluation standard was 7200 [cd]) or more in terms of central luminous intensity.

As is apparent from Table 2, when the relational expression 0.2 ≦ L _S1 / L _C1 ≦ 0.9 is satisfied, for example, L _S1 / L _C1 = (0.2, 0.3, 0.4, 0. 5, 0.6, 0.7, 0.8, 0.9), the central illuminance is 8500 [lx, which exceeds the central illuminance (6500 [lx] of the conventional product, 6500 [cd] in terms of central luminous intensity). ] (8500 [cd] in terms of central luminous intensity) or more, and the beam angle is in the range of 7.5 degrees to 12.5 degrees, and it was found that all satisfy the above-described evaluation criteria. This is apparent from the light distribution curves shown in FIGS. 19 and 20, and the illuminance at the central portion on the irradiation surface is high, and the irradiation light does not spread to the peripheral region of the central portion. On the other hand, when the relational expression L _S1 / L _C1 > 0.9 is satisfied, for example, when L _S1 / L _C1 = (1.0), the central illuminance is the central illuminance (6500 [lx], the central luminous intensity of the conventional product). Although it exceeded 6500 [cd]) in terms of conversion and satisfied the above-mentioned evaluation criteria, it was found that the beam angle was 13.0 degrees and did not satisfy the above-mentioned evaluation criteria. Further, when the relational expression L _S1 / L _C1 <0.2 is satisfied, for example, when L _S / L _C = (0, 0.1), the beam angle is 7.5 degrees, and the above evaluation criteria However, it was found that the central illuminance does not satisfy the above evaluation criteria. The reason for this result is considered as follows. The relational expression L _S1 / L _C1 ≦ 0.9 is satisfied, and the coil length L _C1 of the central filament element 19 is made relatively long in an appropriate range with respect to the coil length L _S1 of the peripheral filament elements 20, 21 and 22. As a result, the coil length L _S1 of the peripheral filament elements 20, 21, 22 that greatly contributes to the increase or decrease of the illuminance in the peripheral region of the central portion on the irradiation surface can be appropriately shortened, while the central portion on the irradiation surface is correspondingly reduced. The coil length L _C1 of the central filament element 19 that greatly contributes to the increase / decrease in the illuminance (center illuminance) can be made as long as possible. As a result, first, it is possible to reduce the illuminance of the peripheral area of the central portion of the irradiated surface as much as possible while leaving the contribution to the increase of the illuminance to the central portion of the irradiated surface by the peripheral filament elements 20, 21, and 22. it can. Secondly, the illuminance to the central portion of the irradiated surface can be further increased by increasing the coil length L _C1 of the central filament element 19. And it is thought that these results overlapped and the favorable light distribution curve as shown in FIG.19 and FIG.20 was obtained. However, if the relational expression of L _S1 / L _C1 <0.2 is satisfied, the coil length L _C1 of the central filament element 19 becomes longer, but there are many portions that deviate from the central illuminance contribution region in the reflecting mirror 2. The relative length of the coil length L _S1 of the peripheral filament elements 20, 21, 22 relative to the coil length L _C1 of the central filament element 19 becomes too small, and the effect of installing the peripheral filament elements 20, 21, 22 is It is thought that it has decreased remarkably. On the other hand, when the relational expression L _S1 / L _C1 > 0.9 is satisfied, the coil length L _C of the central filament element 19 is sufficiently long relative to the coil length L _S1 of the peripheral filament elements 20, 21, 22. Therefore, it is considered that the peripheral filament elements 20, 21, and 22 increase the illuminance in the peripheral region of the central portion on the irradiation surface, and a desired beam angle cannot be obtained.

Therefore, when the coil length of the central filament element 19 is L _C1 [mm] and the coil length of the peripheral filament elements 20, 21, 22 is L _S1 [mm], the central filament element 19 and the peripheral filament elements 20, 21, 22 are used. In order to obtain a desired beam angle (narrow angle) and realize good light distribution characteristics while increasing the central illuminance by the contribution of both, a relational expression 0.2 ≦ L _S1 / L _C1 ≦ 0.9 It was found that the value of (L _S1 / L _C1 ) should be 0.2 to 0.9.

As described above, according to the configuration of the halogen bulb 1 with a reflector according to the fifth embodiment of the present invention, the central illuminance is increased by the contribution of both the central filament element 19 and the peripheral filament elements 20, 21, and 22. The spread of irradiation light by the peripheral filament elements 20, 21, 22 can be suppressed, and a narrow beam angle can be obtained to realize a good light distribution characteristic.
(Embodiment 6)
Next, the illumination device according to the sixth embodiment of the present invention is used as general illumination such as a spotlight, and has a rated power of 65 according to the above-described fifth embodiment of the present invention. The halogen lamp 1 with a reflector of [W] has a configuration attached to various known lighting fixtures (not shown).

According to the configuration of the illumination device according to the sixth embodiment of the present invention, it is possible to provide an illumination device that has high central illuminance and can realize good light distribution characteristics with a narrow beam angle. .
(Embodiment 7)
Next, the illumination device according to the seventh embodiment of the present invention is used as general illumination such as a spotlight, for example, and has a rated power of 65 according to the above-described fifth embodiment of the present invention. [W] The halogen light bulb 3 used in the halogen light bulb 1 with a reflecting mirror 1 and various known bases that can be attached to the end of the halogen light bulb 3 on the sealing portion 12 side, for example, E-shaped bases (see FIG. A halogen light bulb having a configuration provided with a reflector portion provided in the illumination device.

In addition, the reflecting mirror part may be a non-replaceable one that has a reflecting surface composed of a spheroid or a paraboloid, is fixed to a lighting fixture, and can be replaced according to the intended use. It may be.
According to the configuration of the halogen bulb according to the seventh embodiment of the present invention, the central filament element 19 and the halogen bulb 1 with a reflector according to the fifth embodiment of the present invention described above and While the central illuminance is increased by the contribution of both the peripheral filament elements 20, 21, 22 and the spread of the irradiation light by the peripheral filament elements 20, 21, 22 can be suppressed, a narrow beam angle is obtained and good light distribution Characteristics can be realized.

And the illumination device which can implement | achieve a favorable light distribution characteristic with a high center illumination intensity and a narrow beam angle similarly to the illumination device which is the above-mentioned 3rd Embodiment of this invention can be provided.
In each of the above embodiments, the case where the three peripheral filament elements 20, 21, and 22 are arranged so as to form a substantially equilateral triangle has been described. In addition to this, the four peripheral filament elements are formed into a substantially square shape. When the five peripheral filament elements are arranged to form a substantially regular pentagon, the six peripheral filament elements are arranged to form a substantially regular hexagon, or more Even if it exists, the effect similar to the above can be acquired.

In each of the above embodiments, the case where the halogen light bulb 3 having a rated power of 65 [W] is used has been described. However, the present invention is not limited to this. For example, a halogen light bulb having a rated power of 20 [W] to 150 [W] is used. Even in such a case, the same effect as described above can be obtained.
In each of the above embodiments, the glass bulb 13 in the halogen bulb 3 is formed by sequentially connecting the chip-off part 10, the substantially cylindrical light emitting part 11 and the sealing part 12 to each other. As described above, but not limited to this, a chip-off part (which may not be present in some cases), a glass bulb or chip-off part in which a substantially spherical or substantially spheroid light emitting part and a sealing part are successively formed (In some cases, it may not be present), a substantially spherical or substantially spheroid light emitting part, a glass bulb formed by successively connecting a reduced diameter part and a sealing part, or a chip-off part (may be absent in some cases) Glass bulbs of various known shapes such as glass bulbs in which a light emitting portion, a reduced diameter portion, a cylindrical portion, and a sealing portion having a substantially spherical or substantially spheroidal shape are successively connected. Even with has the advantages similar to those described above.

In each of the above embodiments, the case where the halogen light bulb 3 is used has been described. However, in the case where various known incandescent light bulbs are used in place of this type of halogen light bulb 3, the same effect as described above can be obtained. It is something that can be done.
The best mode for carrying out the present invention will be described below with reference to the drawings.
(Embodiment 8)
As shown in FIG. 21, a halogen bulb 31 with a rated power of 65 [W] (rated voltage of 110 [V]) according to the eighth embodiment of the present invention includes a bulb 32 made of quartz glass or hard glass, For example, an E-shaped base 34 fixed by a known adhesive 33 is provided on a sealing portion 40 side of a bulb 32 described later.

  The bulb 32 is formed by a tip-off portion 36 that is a residual mark of sealing cut, a light-emitting portion 37 having a substantially spheroid shape, a reduced diameter portion 38, a substantially cylindrical tube portion 39, and a known pinch seal method. The sealing portions 40 are formed so as to be successively connected. A visible light transmitting infrared reflecting film 41 is formed on the outer surfaces of the tip-off portion 36, the light emitting portion 37, and the reduced diameter portion 38 among the outer surfaces of the bulb.

The "substantially spheroid shape" as used herein includes not only the complete spheroid shape but also the case where it deviates from the complete spheroid shape due to variations in glass processing. I mean.
A filament body 42 is disposed in the light emitting portion 37, and a predetermined amount of each of a halogen substance and a rare gas or a halogen substance, a rare gas, and a nitrogen gas is sealed therein.

  For example, one end of an internal lead wire 43 made of tungsten is connected to both ends of the filament body 42. The other end portion of the internal lead wire 43 is connected to one end portion of the external lead wire 45 through a molybdenum metal foil 44 sealed in the sealing portion 40. The other end of the external lead wire 45 is led out of the valve 32 and is electrically connected to the terminal portions 35a and 35b of the base 34, respectively.

  The filament body 42 has three filament elements 46, 47, 48 as shown in FIGS. These filament elements 46, 47, and 48 are all made of tungsten, and are formed of a cylindrical single-winding coil extending linearly, and each is electrically connected in series. The wire diameter of the tungsten wire constituting the single winding coil is 0.015 [mm] to 0.100 [mm], for example 0.050 [mm].

In FIG. 22 and FIG. 23, the filament elements 46, 47 and 48 are schematically depicted as cylindrical bodies.
These three filaments elements 46, 47, 48, as shown in FIG. 23, the central axis b2, c2, d2 of the longitudinal direction thereof is substantially parallel to the central axis _{X 2} longitudinal valve 32 and a state in which the bristled so as to surround the longitudinal central axis X ₂ of the valve 32, each of the longitudinal central axis b2, c2, d2 and optionally perpendicular to the longitudinal direction of the central axis X ₂ of the valve 32 when connecting the plane P ₂ and intersects the intersection of each, they are arranged to form a substantially equilateral triangle that points on the longitudinal central axis X ₂ of the valve 32 and the center of gravity (centroid). In other words, the distance _{D 3} is substantially equal to each other, and each filament element between the two filament elements 47, 48 adjacent to the certain one filament element 46 (47 or 48) and which (46, 48 or 46, 47) The distances D ₄ between 46, 47, 48 and the central axis X _{2 in} the longitudinal direction of the bulb 32 are also substantially equal.

The “substantially parallel” and “substantially equilateral triangle” referred to here are completely equilateral triangles due to variations in assembly accuracy in the assembly process of the filament body 42 and the assembly process of the bulb 32 and the filament body 42. Is difficult to form, and in practice, the positional relationship may deviate from perfect parallelism, and the shape may deviate from perfect equilateral triangles. The same applies to the distance D ₃ and the distance D ₄ being “substantially equal”.

Such a filament body 42 is housed in one cylindrical body in which each filament element has an outer diameter (maximum outer diameter) r ₁ [mm], and this filament body is virtually combined with each filament element 46, 47, 48. It can be regarded as a single filament. In such a case, the maximum inner diameter of the portion of the bulb 32 where the filament body 42 is located is R ₂ (see FIG. 21) [mm], and the maximum outer diameter of the filament body 42 regarded as one filament is r ₁ [ mm] is set so as to satisfy the relational expression of 0.25 ≦ r ₁ / R ₂ ≦ 0.75 for the reason described later.

At that time, the maximum outer diameter r ₀ and the coil length L _S2 of the individual filament elements 46, 47, 48 are used so that the illuminance irradiated from the filament elements 46, 47, 48 to the irradiation surface becomes uniform. In addition, it is preferable that at least one of the maximum outer diameter r ₀ and the coil length L _S2 has the same size, and it is more preferable that all the sizes have the same size. However, the maximum outer diameter r ₀ and the coil length L _S2 may vary among the individual filament elements 46, 47, 48 due to processing variations in the manufacturing process of the filament elements.

Moreover, it is preferable that the edge on the opposite side to the sealing part 40 among the ends of each filament element 46, 47, 48 is located in substantially the same plane, respectively. Thereby, the illumination intensity to the irradiation surface irradiated by each filament element 46, 47, 48 can be made uniform, and a uniform light distribution curve can be obtained.
Here, the maximum outer diameter r ₁ is obtained by appropriately changing the distance D ₃ (or the distance D ₄ ) between two adjacent filament elements and the maximum outer diameter r ₀ of each filament element 46, 47, 48. Can be adjusted. In general, the length of the tungsten wire constituting the coil of the filament body 42 is determined according to the rated power of the halogen bulb. As an example, the length of a tungsten wire used for a halogen bulb with a rated power of 65 [W] is, for example, 420 [mm] to 480 [mm], and the length of the tungsten wire used for a halogen bulb with a rated power of 20 [W]. For example, the length of the tungsten wire of the halogen light bulb having a rated power of 100 [W] of 250 [mm] to 300 [mm] is 540 [mm] to 620 [mm]. Therefore, the maximum outer diameter r ₀ of each filament element 46, 47, 48 is appropriately changed in the coil length L _S2 of each filament element 46, 47, 48 and the coil pitch (interval between adjacent coil portions). Can be adjusted by. As an example, in the case of being used for a halogen light bulb with a rated power of 65 [W], as shown in FIGS. 8 and 9, three filament elements 46, 47, 48 in which the filament body 42 is composed of a single winding coil of the same size. As a configuration, the coil length L _S2 is set in a range of 4.0 [mm] to 6.7 [mm]. The coil pitch is set in the range of 0.05 [mm] to 0.07 [mm].

Here, as the coil constituting the filament elements 46, 47, 48, a double-winding coil or a triple-winding coil can be used in addition to the single-winding coil.
Next, when the maximum inner diameter of the portion of the bulb 32 where the filament body 42 is located is R ₂ [mm] and the maximum outer diameter of the filament body 42 is r ₁ [mm], 0.25 ≦ r ₁ The reason why the relational expression / R ₂ ≦ 0.75 is satisfied will be described.

First, in the halogen light bulb 31 with the rated power of 65 [W], the maximum inner diameter R _{2 of the} portion of the bulb 32 where the filament body 42 is located is fixed to 12 mm, and the maximum outer diameter r ₁ of the filament body 42 is set. the [mm], was prepared which was varied as shown in Table 3 by changing the distance D ₃ between the two filaments adjacent elements appropriately by ten, respectively. Then, each manufactured product is lit at the rated power, and the number of filament bodies 42 that have been disconnected until 3500 hours of lighting has elapsed and 4000 hours of lighting has elapsed, and 4000 of the filament bodies 42 that have not been disconnected. When the number of blackened parts on the inner surface of the bulb 32 during the time lighting was examined, the results as shown in Table 3 were obtained.

  In Table 3, in the "Presence / absence of disconnection" column, the denominator indicates the total number of samples, and the numerator indicates the number of the disconnected filament bodies 42 out of the total number of samples. Also, in the “Presence or absence of blackening” column, the number of samples in which the denominator did not break out of the total number of samples, and the number of samples in which the numerator was blacked out of the number of samples in which the numerator did not break Each is shown. However, in the determination of blackening, it is determined that “blackening is present” when it can be visually confirmed that black colored substances are attached to the inner surface of the valve 32. This black colored material is one in which tungsten which is a constituent material of the filament body 42 is evaporated and adhered during lighting.

Moreover, as a lighting method, this was repeated for one cycle of lighting for 5.5 hours and turning off for 0.5 hours. The “lighting elapsed time” is an accumulated time of the lighting time.
Further, in each sample prepared, the filament elements 46, 47, and 48 are each formed of a single winding coil having the same shape and the same size, and the pitch p is 0.05 [mm] to 0.07 [mm], and the maximum outside. The diameter r ₀ is 0.65 [mm], and the coil length L _S2 is 5.4 [mm].

As apparent from Table 3, when satisfying the relational expression of 0.25 ≦ r ₁ / R ₂ ≦ 0.75, for example, r ₁ / R ₂ = (0.25, 0.35, 0.50, 0. In the case of No. 75), none of the samples had the filament body 42 disconnected before the lapse of lighting for 3500 hours, and no blackening occurred on the inner surface of the bulb 32 by the lapse of lighting for 4000 hours. In particular, when satisfying the relational expression of 0.35 ≦ r ₁ / R ₂ ≦ 0.75, for example, when r ₁ / R ₂ = (0.35, 0.50, 0.75), any sample None of the filament bodies 42 were disconnected before the lapse of lighting for 4000 hours.

On the other hand, when satisfying the relational expression of 0.25> r ₁ / R ₂ , for example, when r ₁ / R ₂ = (0.20), 8 samples out of 10 are filament bodies before the lapse of lighting for 4000 hours. 42 was disconnected, but no blackening occurred on the inner surface of the valve 32 in any of the two samples remaining without disconnection. Further, when the relational expression r ₁ / R ₂ > 0.75 is satisfied, for example, when r ₁ / R ₂ = (0.80), the filament body 42 has not been turned on until lapse of 4000 hours in all 10 samples. Although nothing was disconnected, blackening occurred on the inner surface of the valve 32 in all of the ten.

Note that the location where the wire was disconnected was near the center of the filament elements 46, 47, and 48 in all samples.
The reason for this result is considered as follows.
That is, when the relational expression of 0.25> r ₁ / R ₂ is satisfied, a gap between the bulb 32 and the filament body 42 becomes large, and a convection layer generated between the bulb 32 and the filament body 42 during lighting. Becomes thicker. As a result, the moving speed of tungsten, which is a constituent material of the filament body 42 evaporated during lighting, increases, and the amount of evaporation of tungsten increases accordingly. Therefore, it is considered that the tungsten wire (hereinafter, simply referred to as “tungsten wire”) of the coil constituting the filament body 42 is thinned by evaporation of the tungsten, resulting in disconnection. On the other hand, when the relational expression r ₁ / R ₂ > 0.75 is satisfied, the gap between the bulb 32 and the filament body 42 is reduced, but the bulb 32 is too close to the filament body 42 and the bulb is turned on. The temperature of becomes considerably high. On the contrary, the temperature of the filament body 42 is abnormally increased by the radiant heat from the bulb 32 that has become high temperature, and the evaporation of tungsten, which is a constituent material of the filament body 42, is promoted. It is thought that it has adhered. However, even in the latter case, a phenomenon that the tungsten wire is thinned by evaporation of tungsten was observed, but the wire was not broken. This is considered to be because the convection layer is thinner in the latter case and the evaporation rate of tungsten is slower than in the former case. In this experiment, the valve 32 was not damaged, but when the inner surface of the valve 32 is blackened as described above, heat is easily absorbed. There is a risk of damage.

On the other hand, when the relational expression of 0.25 ≦ r ₁ / R ₂ ≦ 0.75 is satisfied, the gap between the valve 32 and the filament body 42 is reasonably small. This is probably because the convection layer generated between them became extremely thin, and as a result, the moving speed of tungsten evaporated during lighting became slow, and the evaporation amount of tungsten was correspondingly reduced accordingly. Moreover, since the bulb 32 is not too close to the filament body 42, the temperature of the bulb 32 does not become excessively high during lighting, and therefore the temperature of the filament body 42 does not rise abnormally. It is thought that.

Therefore, when the maximum inner diameter of the portion of the bulb 32 where the filament body 42 is located is R ₂ [mm] and the maximum outer diameter of the filament body 42 is r ₁ [mm], the inner surface of the bulb 32 is blackened. It was found that the relational expression 0.25 ≦ r ₁ / R ₂ ≦ 0.75 should be satisfied in order to prevent disconnection of the filament body 42 and extend the life while preventing the filament body 42 from being broken. In particular, it has been found that the relational expression of 0.35 ≦ r ₁ / R ₂ ≦ 0.75 should be satisfied in order to further extend the life.

  As described above, according to the configuration of the halogen bulb 31 according to the eighth embodiment of the present invention, the convection layer generated between the bulb 32 and the filament body 42 can be made extremely thin. The amount of evaporation of tungsten, which is a constituent material, can be remarkably reduced. As a result, it is possible to prevent the tungsten wire of the coil constituting the filament body 42 from being thinned and disconnected, thereby extending the life. . In addition, since the gap between the bulb 32 and the filament body 42 is kept moderate, both the bulb 32 and the filament body 42 can be prevented from becoming abnormally hot during lighting. Can be prevented from being damaged, or the inner surface of the bulb 32 from being blackened due to excessive evaporation of tungsten, which is a constituent material of the filament body 42.

  In the eighth embodiment, the case where the three filament elements 46, 47, and 48 are arranged so as to form a substantially equilateral triangle has been described. In addition to this, four filament elements are formed into a substantially square shape. In the case where the five filament elements are arranged so as to form a substantially regular pentagon, the case where the six filament elements are arranged so as to form a substantially regular hexagon, or more. Can obtain the same effects as described above. Of course, if necessary, another filament element may be provided in the space surrounded by the filament elements, for example, the same shape, the same size, or a different shape, or a different size of the filament element. Even when the filament body arranged so as to be substantially positioned on the central axis X in the direction is used, the same effect as described above can be obtained.

  Further, in the eighth embodiment, as the shape of the bulb 32, the tip-off part 36, the light-emitting part 37 having a substantially spheroid shape, the reduced diameter part 38, the cylindrical part 39 and the sealing part 40 are successively formed. However, the present invention is not limited to this, and the chip-off part (may be omitted in some cases), the light-emitting part having a substantially spheroid shape, the reduced diameter part, and the sealing part are successively formed. Valve, chip-off part (may not be present in some cases), valve formed by a light-emitting part and sealing part having a substantially spheroidal shape in sequence, or chip-off part (may not be present in some cases) The same effect as described above can be obtained even when a well-known various shape bulb such as a bulb in which a substantially cylindrical light emitting portion and a sealing portion are successively formed is used. Of course, instead of the above-described substantially spheroidal shape, a light emitting portion having a substantially spherical shape or a substantially composite ellipsoidal shape can also be used.

Further, in the eighth embodiment, the tungsten wire is wound so that it has a cylindrical shape, that is, the outer shape of the cross section cut perpendicularly to the central axes b2, c2, d2 in the longitudinal direction draws a circle. The case where the filament elements 46, 47, and 48 formed of the single-wound coil are used has been described. However, the present invention is not particularly limited to the outer shape, and for example, as shown in FIG. 24, the outer shape of the cross section cut perpendicularly to the central axes b2, c2, d2 in the longitudinal direction is an ellipse. In the case where filament elements 49, 50, 51 composed of coils wound so as to draw are used, the same effect as described above can be obtained. Also in the example shown in FIG. 24, each filament element 49, 50 and 51 are centered on the point on the longitudinal central axis _{X 2} of the valve 32, and the diameter of a circle circumscribing the filament element 49, 50, 51 it can be accommodated in a cylindrical body to the maximum outer diameter r _1. The maximum outer diameter r ₁ can also be determined in this manner even in the filament body 52 composed of the filament elements 49, 50, 51 having the outer shape as shown in FIG.
(Embodiment 9)
Next, as shown in FIG. 25, a halogen bulb 53 with a rated power of 65 [W] (rated voltage 110 [V]) according to the ninth embodiment of the present invention is mainly used for general illumination such as a spotlight. Is incorporated in the reflecting mirror portion 55 of a known illumination device 54 used as a valve 56 made of quartz glass, hard glass, or the like, and a known portion on the sealing portion 66 side described later of the bulb 56. For example, an E-shaped base (not shown) fixed by an adhesive (not shown) is provided.

The optical axis Y ₃ in the longitudinal central axis X ₃ and the reflection mirror portion 55 of the valve 56 of the halogen lamp 53, are substantially positioned on the same axis.
The illuminating device 54 is a cylindrical illumination in which light is irradiated from the opening 57 on the front surface, and a receiving tool (not shown) to which the reflector 55 and the base of the halogen bulb 53 are attached is housed. An instrument 58 is included.

In the reflecting mirror 55, a front glass 60 is attached to the opening 59 on the front surface, and a reflecting surface 61 of a rotating body made of a spheroid or paraboloid is formed on the inner surface. The reflecting surface 61 may be faceted as necessary.
The bulb 56 is formed by a chip-off portion 62 which is a residual mark of sealing cut, a light-emitting portion 63 having a substantially spheroidal shape, a reduced diameter portion 64, a substantially cylindrical tube portion 65, and a known pinch seal method. The sealing portions 66 are formed so as to be successively connected. A visible light transmitting infrared reflection film 67 is formed on the outer surface of the bulb 56 on the outer surface of the light emitting portion 63 and the reduced diameter portion 64.

The "substantially spheroid shape" as used herein includes not only the complete spheroid shape but also the case where it deviates from the complete spheroid shape due to variations in glass processing. I mean.
A filament body 68 is disposed in the light emitting portion 63, and a predetermined amount of a halogen substance and a rare gas, or a halogen material, a rare gas, and a nitrogen gas are sealed therein.

  For example, one end of an internal lead wire 69 made of tungsten is connected to both ends of the filament body 68. The other end portion of the internal lead wire 69 is connected to one end portion of an external lead wire (not shown) via a molybdenum metal foil (not shown) sealed in the sealing portion 66. The other end portion of the external lead wire is led out of the bulb 56 and is electrically connected to the terminal portion of the base.

  As shown in FIGS. 26 and 27, the filament body 68 includes one central filament element 70 and three peripheral filament elements 71, 72, 73. Each of the central filament element 70 and the peripheral filament elements 71, 72, 73 is made of tungsten, and is composed of a single-winding coil extending linearly in a cylindrical shape, and each is electrically connected in series. The wire diameter of the tungsten wire constituting the single winding coil is 0.015 [mm] to 0.100 [mm], for example 0.050 [mm].

In FIGS. 26 and 27, the central filament element 70 and the peripheral filament elements 71, 72, and 73 are schematically depicted as cylindrical bodies.
Central filament element 70, when this halogen lamp 53 is incorporated into the reflector 55 of the lighting device 54, the longitudinal central axis a3 is substantially located on the optical axis Y ₃ of the reflection mirror portion 55. Specifically, the central filament element 70, the longitudinal central axis a3 is arranged so as to be substantially located on the longitudinal central axis X ₃ of the valve 56. Then, when the halogen lamp 53 is incorporated in the reflector part 55, since the longitudinal central axis X ₃ of the valve 56 is substantially located on the optical axis Y ₃ of the reflection mirror portion 55, resulting in the central filament element longitudinal central axis a3 70 comes to substantially positioned on the optical axis Y ₃ of the reflection mirror portion 55.

Here, the "substantially position", ideally it is preferable that the central axis a3 is located entirely on the longitudinal central axis X ₃ of the valve 56, the alignment accuracy in the manufacturing process practically the variation of the deviation from the central axis a3 is the central axis X _3, there is a case where consequently also deviated from the optical axis Y _3, is meant to include also the case. Of course, the central axis a3 depending on the type of lighting device may deviate from the optical axis Y _3, is meant to include also the case incorporated.

The peripheral filament elements 71, 72, 73 are arranged around the central filament element 70 so that the longitudinal central axes b 3, c 3, d 3 are substantially parallel to the longitudinal central axis a 3 of the central filament element 70. ing. Further, as shown in FIG. 27, these three peripheral filament elements 71, 72, 73 are perpendicular to the longitudinal center axes b3, c3, d3 and the longitudinal center axis a3 of the center filament element 70, respectively. when connecting such arbitrary plane P ₃ and intersect the intersection, respectively, it is arranged a point on the longitudinal center axis a3 of the central filament element so as to form a substantially equilateral triangle and the center of gravity (centroid). In other words, two peripheral distance _{D 5} is adjacent all substantially equal, and as a peripheral filament element 71 is (72 or 73) and which between the central filament element 70 and each of the peripheral filaments elements 71, 72, 73 The distances D ₆ between the filament elements 72 and 73 (71, 73 or 71, 72) are substantially equal.

The “substantially parallel” and “substantially equilateral triangle” referred to here are perfectly equilateral triangles due to variations in assembly accuracy in the assembly process of the filament body 68 and the assembly process of the valve 56 and the filament body 68. Is difficult to form, and in practice, the positional relationship may deviate from perfect parallelism, and the shape may deviate from perfect equilateral triangles. The same applies to the distance D ₅ and the distance D ₆ being “substantially equal”.

The central filament element 70 includes a position of the focal point F ₂ of the rotating body which forms the reflection surface 61 as shown in FIG. 26, and the center point A ₃ located on the central axis a3 of the central filament element 70 It is arranged so as to be opposite to the opening 59 for emitting light in the reflection mirror portion 55 than the position of the focal point F _2. Also, the peripheral filament elements 71, 72, 73 are based on this, and each of the peripheral filament elements 71, 72, 73 is a point F _b3 , F _c3 , F _d3 (described later in FIG. Center points B ₃ , C ₃ , D ₃ (FIG. 26) including the positions of the points F _b3 , F _c3 ) and on the central axes b ₃ , c ₃ , d _{3 of the} peripheral filament elements 71, 72, 73. Then, only the points B ₃ and C ₃ are illustrated) are arranged so as to be located on the opposite side of the opening 59 from the positions of the points F _b3 , F _c3 and F _d3 . However, the points F _b3 , F _c3 , and F _d3 include a plane Q ₃ that includes the position of the focal point F ₂ of the rotating body that forms the reflecting surface 61 and that intersects perpendicularly to the optical axis Y ₃ of the reflecting mirror portion 55. And the intersections of the central axes b3, c3 and d3, respectively. As an example, the distance between the focal point F ₂ and the center point A ₃ is 2.35 [mm], and the distance between the points F _b3 , F _c3 , F _d3 and the center points B ₃ , C ₃ , D ₃ is. Each distance is 1.21 [mm]. Thus the central filament element 70 and the peripheral filaments elements 71, 72, 73, the center point _B 3 of the center point _{A 3} and the peripheral filaments elements 71, 72, 73 of the central filament element _70, C 3, _{D 3} is the reflector relative to the focal F ₂ of the reflecting surface 61 of the part 55, the opening 59 comprises by arranging so as to be positioned on the opposite side, regions which contribute to the central illuminance at the reflecting mirror portion 55, i.e., the focal point F ₂ The density of the filament body 68 in the vicinity region (hereinafter simply referred to as “central illuminance contribution region”) can be increased, and the central illuminance can be increased.

Such a filament body 68 is accommodated in one cylindrical body in which the central filament element 70 and the peripheral filament elements 71, 72, 73 have an outer diameter (maximum outer diameter) r ₃ [mm]. The central filament element 70 and the peripheral filament elements 71, 72, 73 can be regarded as a single filament. In such a case, the maximum inner diameter of the portion of the bulb 56 where the filament body 68 is located is R ₃ (see FIG. 25) [mm], and the maximum outer diameter of the filament body 68 regarded as one filament is r ₃ [ mm], in order to prevent the inner surface of the bulb 56 from being blackened, to prevent the filament body 68 from being disconnected and to prolong the service life, 0.25 ≦ r ₃ / R ₃ ≦ 0.75. Is set to satisfy the following relational expression. In particular, in order to further extend the life, it is preferable to set so as to satisfy the relational expression of 0.35 ≦ r ₃ / R ₃ ≦ 0.75.

That is, when the relational expression of 0.25 ≦ r ₃ / R ₃ ≦ 0.75 is satisfied, the gap between the valve 56 and the filament body 68 is reasonably small, and thus occurs between the valve 56 and the filament body 68. The convection layer can be made extremely thin. As a result, it is a constituent material of the filament body 68, and the moving speed of tungsten evaporated during lighting can be slowed, and the evaporation amount of tungsten can be significantly reduced accordingly. Therefore, it is possible to prevent the tungsten wire of the coil to be thinned due to the evaporation of the tungsten and to break the wire, thereby extending the life. Moreover, since the bulb 56 is not too close to the filament body 68, the temperature of the filament body 68 does not rise excessively with the abnormal rise in the temperature of the bulb 56 during lighting. The evaporation amount of tungsten which is a constituent material of the filament body 68 is promoted, and the evaporated tungsten can be prevented from adhering to the inner surface of the bulb 56 and blackening. On the other hand, when the relational expression of 0.25> r ₃ / R ₃ is satisfied, the gap between the bulb 56 and the filament body 68 becomes large, and the convection layer generated between the bulb 56 and the filament body 68 during lighting. Becomes thicker. As a result, the moving speed of tungsten, which is a constituent material of the filament body 68 that has evaporated during lighting, increases, and the amount of tungsten evaporation increases accordingly, and the tungsten wire of the coil that forms the filament body 68 evaporates this tungsten. It becomes thin and leads to disconnection. When the relational expression r ₃ / R ₃ > 0.75 is satisfied, the gap between the bulb 56 and the filament body 68 is small, but the bulb 56 is too close to the filament body 68 and is turned on. The temperature becomes very high. On the other hand, the temperature of the filament body 68 is excessively increased by the radiant heat from the bulb 56 that has become high temperature, and the evaporation of tungsten, which is a constituent material of the filament body 68, is promoted. Will adhere to the surface and cause blackening. In some cases, blackening of the inner surface of the valve 56 may further increase the temperature of the valve 56 and cause the valve 56 to be damaged.

The maximum outer diameter r ₃ appropriately changes the distance D ₆ (or the distance D ₅ ) between two adjacent filament elements and the maximum outer diameter r ₀ of the central filament element 70 and the peripheral filament elements 71, 72, 73. Can be adjusted. Further, the maximum outer diameter r ₀ of the central filament element 70 and the peripheral filament elements 71, 72, 73 is determined by the coil length L _C3 of the central filament element 70, the coil length L _S3 of the peripheral filament elements 71, 72, 73, It can be adjusted by appropriately changing the pitch.

Here, the coil length L _C3 of the central filament element 70 and the coil length L _S3 of the peripheral filament elements 71, 72, 73 may all be the same length. In that case, for example, in the case of a halogen bulb with a rated power of 65 [W], the coil length L _C3 and the coil length L _S3 are set within a range of 3.0 [mm] to 5.0 [mm]. Is preferred. The coil lengths L _S3 of the peripheral filament elements 71, 72, 73 are all the same, but the coil length L _C3 and the coil length L _S3 may be different. In this case, for example, in the case of a halogen bulb with a rated power of 65 [W], the coil length L _C3 is in the range of 3.5 [mm] to 15.0 [mm], and the coil length L _S3 is 1.5 [mm]. It is preferable that each is set within a range of [mm] to 4.5 [mm]. Furthermore, unlike the coil length L _C3 and the coil length L _S3, and may be a coil length L _S3 of each of the peripheral filaments elements 71, 72, 73 also different. In this case, for example, in the case of a halogen light bulb with a rated power of 65 [W], the coil length L _C3 is set within the range of 3.5 [mm] to 15.0 [mm], and the coil length L _S3 is all It is preferable to set different values within a range of 1.5 [mm] to 4.5 [mm]. The pitch of the single winding coil is set in a range of 0.05 [mm] to 0.07 [mm] in any of the central filament element 70 and the peripheral filament elements 71, 72, and 73.

However, in the case where the relational expression 0.25 ≦ r ₃ / R ₃ ≦ 0.75 is satisfied, the maximum outer diameter r ₀ and the coil length L _S3 of each peripheral filament element 71, 72, 73 are determined by each peripheral filament element. From the viewpoint of making the illuminance irradiated onto the irradiation surface uniform from 71, 72, 73, at least one of the maximum outer diameter r ₀ and the coil length L _S3 may be the same. Preferably, all the dimensions are the same. However, the maximum outer diameter r ₀ and the coil length L _S3 may vary between the individual peripheral filament elements 71, 72, 73 due to processing variations in the manufacturing process of the peripheral filament elements 71, 72, 73.

Of the ends of the filament elements 70, 71, 72, 73, the ends on the opening 59 side are preferably located in substantially the same plane. Thereby, the illumination intensity to the irradiation surface irradiated by each filament element 70, 71, 72, 73 can be made uniform, and a uniform light distribution curve can be obtained.
Furthermore, the coil length L _C3 [mm] of the central filament element 70 and the coil length L _S3 [mm] of the peripheral filament elements 71, 72, 73 are the same for both the central filament element 70 and the peripheral filament elements 71, 72, 73. Obtaining the desired beam angle (narrow angle, for example, 10 degrees, and the allowable range is 7.5 degrees to 12.5 degrees) while increasing the central illuminance by contribution, realizing good light distribution characteristics Therefore, it is preferable to satisfy the relational expression 0.2 ≦ L _S3 / L _C3 ≦ 0.9. However, in this case, the coil lengths L _S3 of the peripheral filament elements 71, 72, 73 are substantially equal. Of course, “substantially equal” means that each coil length L _S3 varies due to variations in the coil manufacturing process as described above.

That is, when the relational expression L _S3 / L _C3 ≦ 0.9 is satisfied, the coil length L _C3 of the central filament element 70 is relatively relative to the coil length L _S3 of the peripheral filament elements 71, 72, and 73. The coil length L _S3 of the peripheral filament elements 71, 72, 73 that greatly contributes to increase / decrease in illuminance in the peripheral area of the central portion on the irradiation surface can be appropriately shortened. The coil length L _C3 of the central filament element 70 that greatly contributes to increase / decrease in the illuminance (central illuminance) of the central portion on the surface can be made as long as possible. As a result, first, it is possible to reduce the illuminance of the peripheral area of the central portion of the irradiation surface as much as possible while leaving the contribution to the increase of the illuminance to the central portion of the irradiation surface by the peripheral filament elements 71, 72, 73. it can. Secondly, the illuminance to the central portion of the irradiated surface can be further increased by increasing the coil length L _C3 of the central filament element 70. And these results overlap and a favorable light distribution curve can be obtained. However, if the relational expression L _S3 / L _C3 <0.2 is satisfied, the coil length L _C3 of the central filament element 70 becomes long, but there are many portions that deviate from the central illuminance contribution region in the reflector 55. Moreover, the relative length of the coil length L _S3 of the peripheral filament elements 71, 72, 73 with respect to the coil length L _C3 of the central filament element 70 is too small, and the peripheral filament elements 71, 72, 73 are installed. The effect is significantly reduced. When the relational expression L _S3 / L _C3 > 0.9 is satisfied, the coil length L _C3 of the central filament element 70 is sufficiently long relative to the coil length L _S3 of the peripheral filament elements 71, 72, 73. Therefore, in other words, when the relational expression L _S3 / L _C3 ≦ 0.9 is satisfied, the relational expression that the coil length L _S3 of the peripheral filament elements 71, 72, 73 is L _S3 / L _C3 ≦ 0.9 is obtained. Since it becomes longer than the case of satisfying, the peripheral filament elements 71, 72, 73 increase the illuminance in the peripheral region of the central portion on the irradiation surface, and a desired beam angle, particularly a narrow beam angle (for example, 10 degrees). In this case, the allowable range is 7.5 degrees to 12.5 degrees).

Further, in this case, the distance _{D 5} between the central filament element 70 and each of the peripheral filaments elements 71, 72, is set in a range of each 0.1 [mm] ~2.2 [mm] Preferably it is. Thereby, the density of the filament body 68 in the central illuminance contribution region can be further increased, the central illuminance can be extremely increased, and the central filament element 70 and the peripheral filament elements 71, 72, 73 are It is possible to prevent arc discharge from occurring between the central filament element 70 and the peripheral filament elements 71, 72, 73 due to the arc discharge. On the other hand, when the distance _{D 5} is smaller than 0.1 [mm], during lighting, the arc discharge is generated between the central filament element 70 and the peripheral filaments elements 71, 72, 73, the central filament element 70 by the arc discharge Or the peripheral filament elements 71, 72, 73 may be broken. The distance when the D ₅ is greater than 2.2 [mm], the smaller the density of the filament assembly 68 in the central illuminance contributing area, or no longer be able to increase the center illuminance very well, near the filament element 71, There is a possibility that the illuminance of the peripheral area of the central portion on the irradiation surface may increase due to 72 and 73.

  Here, as the coils constituting the filament elements 70, 71, 72, 73, a double-winding coil or a triple-winding coil can be used in addition to the single-winding coil. However, when this halogen bulb 53 is used by being incorporated in the reflecting mirror portion 55 of the illumination device 54, from the viewpoint of increasing the central illuminance of the irradiated surface, the coil is more coiled than a double-winding coil or a triple-winding coil. Of the filament body 68 in the central illuminance contribution region (the region contributing to the central illuminance in the reflector portion 55, that is, in the vicinity region including the focal position in the reflector portion 55). It is preferable to use a single-winding coil capable of increasing the density.

  As described above, according to the configuration of the halogen bulb 53 according to the ninth embodiment of the present invention, between the bulb 56 and the filament body 68, similarly to the halogen bulb according to the eighth embodiment of the present invention. Since the generated convection layer can be made extremely thin, the amount of evaporation of tungsten, which is a constituent material of the filament body 68, can be significantly reduced. As a result, the tungsten wire of the coil constituting the filament body 68 is thinned and disconnected. Can be prevented, and the life can be extended. In addition, since the gap between the bulb 56 and the filament body 68 is kept moderate, it is possible to prevent both the bulb 56 and the filament body 68 from becoming abnormally hot during lighting. Can be prevented from being damaged, or the inner surface of the bulb 56 from being blackened due to excessive evaporation of the filament body 68.

In particular, when the coil length of the central filament element 70 is L _C3 [mm] and the coil lengths of the peripheral filament elements 71, 72, 73 are L _S3 [mm], 0.2 ≦ L _S3 / L _C3 ≦ 0.9 By satisfying the following relational expression, the central illuminance is increased by the contribution of both the central filament element 70 and the peripheral filament elements 71, 72, 73 in the state of being incorporated in the reflecting mirror portion 55 of the lighting device 54, while the peripheral illuminance is increased. The spread of irradiation light by the filament elements 71, 72, 73 can be suppressed, and a good light distribution characteristic can be realized by obtaining a narrow beam angle.

In particular, the distance D ₅ between the central filament element 70 and each of the peripheral filament elements 71, 72, 73 is set to a range of 0.1 [mm] to 2.2 [mm], respectively. The density of the filament body 68 in the central illuminance contribution region can be further increased, the central illuminance can be extremely increased, and between the central filament element 70 and the peripheral filament elements 71, 72, 73 during lighting. It is possible to prevent arc discharge from occurring and disconnection of the central filament element 70 and the peripheral filament elements 71, 72, 73 due to the arc discharge.

  In the ninth embodiment, the case where the three peripheral filament elements 71, 72, 73 are arranged so as to form a substantially equilateral triangle has been described. In addition, the four peripheral filament elements are substantially square. Or 5 peripheral filament elements arranged to form a substantially regular pentagon, 6 peripheral filament elements arranged to form a substantially regular hexagon, or more Even if it is a case, the effect similar to the above can be acquired.

  Further, in the ninth embodiment, the tip-off portion 62, the substantially spheroidal light emitting portion 63, the reduced diameter portion 64, the cylindrical portion 65, and the sealing portion 66 are sequentially formed as the bulb shape. However, the present invention is not limited to this, and a chip-off portion (may be omitted in some cases), a light-emitting portion having a substantially spheroidal shape, a reduced diameter portion, and a sealing portion are sequentially formed. Bulb, chip-off part (may not be present in some cases), bulb formed by a light-emitting part and sealing part having a substantially spheroid shape in sequence, or chip-off part (may be absent in some cases) ), Even when a well-known various shape bulb such as a bulb in which a substantially cylindrical light emitting portion and a sealing portion are successively formed is used, the same effect as described above can be obtained. Of course, instead of the above-described substantially spheroidal shape, a light emitting portion having a substantially spherical shape or a substantially composite ellipsoidal shape can also be used.

Furthermore, in the ninth embodiment, the outer shape of the cross section cut in a direction perpendicular to the central axes a3, b3, c3, d3 in the longitudinal direction so as to form a circular shape so that the tungsten wire has a cylindrical shape. The case where the filament elements 70, 71, 72, and 73 formed of the single winding coil wound on is used has been described. However, the present invention is not particularly limited to the outer shape, and for example, as shown in FIG. 28, the outer shape of the cross section cut perpendicular to the central axes a3, b3, c3, and d3 in the longitudinal direction. Even when filament elements 74, 75, 76, 77 made of coils wound so as to draw an ellipse are used, the same effect as described above can be obtained. Also in the example shown in FIG. 28, each filament element 74, 75, 76, 77 is a circle that is centered on a point on the central axis X _{3 in} the longitudinal direction of the bulb 56 and circumscribes each filament element 75, 76, 77. it can be accommodated in a cylindrical body to the maximum outer diameter r ₃ of the diameter. The maximum outer diameter r ₃ can also be determined in this way even in the filament body 78 composed of the filament elements 74, 75, 76, 77 having the outer shape as shown in FIG.
(Embodiment 10)
Next, as shown in FIG. 29, the reflecting mirror with halogen bulb 79 rated power 65 is the tenth embodiment of the present invention [W] (rated voltage 110 [V]), the mirror diameter phi ₂ is 35 A concave reflecting mirror 80 of [mm] to 100 [mm], for example, 50 [mm], and a rated power of 65 [W] according to the fifth embodiment of the present invention disposed inside the reflecting mirror 80 A halogen bulb 31 (with a rated voltage of 110 [V]) (excluding the base 34) and, for example, an E-shaped base 81 attached to the end of the reflecting mirror 80 are provided.

The central axis X _{4 in} the longitudinal direction of the bulb 32 of the halogen bulb 31 substantially coincides with the optical axis Y ₄ of the reflecting mirror 49.
The reflecting mirror 80 is made of hard glass, quartz glass, or the like, and has an opening 82 for irradiating light at one end and a cylindrical neck 83 at the other end, and a spheroidal surface or a paraboloid on the inner surface. A reflecting surface 84 of a rotating body composed of a surface or the like is formed. You may form a facet in the reflective surface 84 as needed.

The opening 82 is provided with a front glass 85 and is fixed by a known stopper 86. As a method for fixing the front glass 85, a known adhesive (not shown) may be used instead of the stopper 86, or the stopper 86 and the adhesive may be used in combination. However, the front glass 85 is not necessarily provided.
A base 81 is provided outside the neck portion 83 so as to cover almost the entire neck portion 83, and is fixed thereto with an adhesive 87. On the other hand, the sealing portion 40 of the halogen light bulb 31 is inserted into the neck portion 83 and is similarly fixed via an adhesive 87.

In addition to a metal film such as aluminum or chromium, a multilayer interference film made of silicon dioxide (SiO ₂ ), titanium dioxide (TiO ₂ ), magnesium fluoride (MgF), zinc sulfide (ZnS), or the like is formed on the reflecting surface 84. Has been.
As described above, according to the configuration of the halogen bulb 79 with a reflector according to the tenth embodiment of the present invention, the bulb 32, the filament body 42, and the like, similar to the halogen bulb according to the eighth embodiment of the present invention. , The evaporation amount of tungsten, which is a constituent material of the filament body 42, can be significantly reduced. As a result, the tungsten wire of the coil constituting the filament body 42 can be reduced. Thinning and disconnection can be prevented, and the life can be extended. In addition, since the gap between the bulb 32 and the filament body 42 is kept moderate, both the bulb 32 and the filament body 42 can be prevented from becoming abnormally hot during lighting. Can be prevented from being damaged, or the inner surface of the bulb 32 from being blackened due to excessive evaporation of the filament body 42.

In the tenth embodiment, the case where the three filament elements 46, 47, and 48 are arranged so as to form a substantially equilateral triangle has been described. In addition to this, four filament elements are formed into a substantially square shape. In the case where the five filament elements are arranged so as to form a substantially regular pentagon, the case where the six filament elements are arranged so as to form a substantially regular hexagon, or more. Can obtain the same effect as described above. Of course, if necessary, another filament element in the space surrounded by each filament element, for example, the same shape, the same size, or a different shape, or a different size of the filament element in the longitudinal direction of the valve 2 it can be on the center axis X ₄ of obtaining the same effect as described above even when a placement is allowed filament body so as to be substantially located.

  Further, in the tenth embodiment, as the shape of the bulb 32, the tip-off part 36, the light-emitting part 37 having a substantially spheroid shape, the reduced diameter part 38, the cylindrical part 39 and the sealing part 40 are successively formed. However, the present invention is not limited to this, and the chip-off part (may be omitted in some cases), the light-emitting part having a substantially spheroid shape, the reduced diameter part, and the sealing part are successively formed. Valve, chip-off part (may not be present in some cases), valve formed by a light-emitting part and sealing part having a substantially spheroidal shape in sequence, or chip-off part (may not be present in some cases) The same effect as described above can be obtained even when a well-known various shape bulb such as a bulb in which a substantially cylindrical light emitting portion and a sealing portion are successively formed is used. Of course, instead of the above-described substantially spheroidal shape, a light emitting portion having a substantially spherical shape or a substantially composite ellipsoidal shape can also be used.

Further, in the tenth embodiment, the tungsten wire is wound so as to form a cylindrical shape, that is, so that the outer shape of the cross section cut perpendicularly to the central axes b3, c3, d3 in the longitudinal direction draws a circle. The case where the filament elements 46, 47, and 48 made of the single-wound coil are used has been described. However, the present invention is not particularly limited to the outer shape, and for example, as shown in FIG. 24, the outer shape of the cross section cut perpendicularly to the central axes b3, c3, d3 in the longitudinal direction is an ellipse. In the case where filament elements 49, 50, 51 composed of coils wound so as to draw are used, the same effect as described above can be obtained.
(Embodiment 11)
Next, as shown in FIG. 30, the halogen bulb 88 with a reflector having a rated power of 65 [W] (rated voltage 110 [V]) according to the eleventh embodiment of the present invention has a mirror diameter φ ₃ of 35. A concave reflecting mirror 89 of [mm] to 100 [mm], for example, 50 [mm], a halogen light bulb 90 disposed inside the reflecting mirror 89, and, for example, E attached to the end of the reflecting mirror 89 And a base 91 having a shape.

A central axis X _{5 in} the longitudinal direction of the bulb 101 described later of the halogen bulb 90 substantially coincides with the optical axis Y ₅ of the reflecting mirror 89.
The reflecting mirror 89 is made of hard glass or quartz glass, and has an opening 93 for irradiating light at one end and a cylindrical neck 94 at the other end, and a spheroidal surface or a paraboloid on the inner surface. A reflecting surface 95 of the rotating body made of a surface or the like is formed. You may form a facet in the reflective surface 95 as needed.

The opening 93 is provided with a front glass 96 and fixed by a known fastener (not shown), a known adhesive (not shown), or a combination thereof. However, the front glass 96 is not necessarily provided.
A base 91 is provided on the outer side of the neck portion 94 so as to cover almost half of the neck portion 94, and is fixed with an adhesive 97. On the other hand, a sealing portion 100 described later of the halogen light bulb 90 is inserted into the neck portion 94 and is similarly fixed through an adhesive 97.

In addition to a metal film such as aluminum or chromium, a multilayer interference film made of silicon dioxide (SiO ₂ ), titanium dioxide (TiO ₂ ), magnesium fluoride (MgF), zinc sulfide (ZnS), or the like is formed on the reflecting surface 95. Has been.
The halogen light bulb 90 is a quartz glass in which a chip-off part 98 that is a residual mark of sealing cut, a substantially cylindrical light emitting part 99, and a sealing part 100 formed by a known pinch seal method are successively connected. And a bulb 101 made of hard glass or the like. A visible light transmitting infrared reflecting film may be formed on the outer surface of the bulb 101 as necessary.

The “substantially cylindrical shape” mentioned here means not only the case of a perfect cylindrical shape but also the case of deviation from the perfect cylindrical shape due to variations in processing of glass.
A filament body 102 is provided in the light emitting unit 99, and a predetermined amount of a halogen substance and a rare gas, or a halogen material, a rare gas, and a nitrogen gas are sealed therein.

  For example, one end of an internal lead wire 103 made of tungsten is connected to both ends of the filament body 102. The other end portion of the internal lead wire 103 is connected to one end portion of the external lead wire 105 through a metal foil 104 made of molybdenum sealed in the sealing portion 100. The other end portion of the external lead wire 105 is led out of the valve 101 and is electrically connected to the terminal portions 92a and 92b of the base 91, respectively.

In the present embodiment, the configuration of the filament body 102 is the same as that of the filament body 68 in the sixth embodiment, and therefore the filament body 102 will be described with reference to FIGS. 26 and 27.
As shown in FIGS. 26 and 27, the filament body 102 includes one central filament element 106 and three peripheral filament elements 107, 108, and 109. The central filament element 106 and the peripheral filament elements 107, 108, and 109 are all made of tungsten, and are formed of a cylindrical single-winding coil extending linearly, and are electrically connected in series. . The wire diameter of the tungsten wire constituting this single winding coil is 0.015 [mm] to 0.100 [mm], for example 0.050 [mm].

Central filament element 106, the longitudinal direction of the central axis a5 is substantially located on the optical axis Y ₅ of the reflector 89.
Here, the "are substantially position", ideally it is preferable that the central axis a5 are located entirely on the optical axis Y ₅ of the reflector 89, the alignment accuracy in the manufacturing process practical due to variations, there are cases where the center axis a5 deviates from the optical axis Y ₅ of the reflector 89, is meant to include also the case.

The peripheral filament elements 107, 108 and 109 are arranged around the central filament element 106 so that the longitudinal center axes b 5, c 5 and d 5 are substantially parallel to the longitudinal center axis a 5 of the central filament element 106. ing. Further, as shown in FIG. 27, these three peripheral filament elements 107, 108, 109 are perpendicular to the respective longitudinal center axes b 5, c 5, d 5 and the longitudinal center axis a 5 of the center filament element 106. when connecting such arbitrary plane P ₅ and intersects the intersection of each of which is arranged a point on the longitudinal center axis a5 of the central filament element so as to form a substantially equilateral triangle and the center of gravity (centroid). That is, the distances D ₇ between the central filament element 106 and the respective peripheral filament elements 107, 108, 109 are all substantially equal, and one peripheral filament element 107 (108 or 109) is adjacent to the two peripheral areas. The distances D ₈ between the filament elements 108 and 109 (107, 108 or 107, 109) are substantially equal.

The “substantially parallel” and “substantially equilateral triangle” referred to here are completely parallel due to variations in assembly accuracy in the assembly process of the filament body 102, and it is difficult to form a perfect equilateral triangle. In some cases, the positional relationship may deviate from parallel, and the shape may deviate from a perfect equilateral triangle. The same applies to the distance D ₇ and the distance D ₈ being “substantially equal”.

The central filament element 106 includes a position of the rotator focus F ₅ of which forms the reflecting surface 95 as shown in FIG. 26, and the center point A ₅ in on the central axis a5 of the central filament element 106 It is arranged so as to be opposite to the opening 93 than the position of the focal point F _5. The peripheral filament elements 107, 108, and 109 are also based on this, and the respective peripheral filament elements 107, 108, and 109 are points F _b5 , F _c5 , and F _d5 (described later in FIG. 26) in the reflecting mirror 89, respectively. Center points B ₅ , C ₅ , D ₅ (shown in FIG. 26) including the positions of F _b5 , F _c5 ) and on the central axes b 5, c 5, d 5 of the respective peripheral filament elements 107, 108, 109. , Only the points B ₅ and C ₅ are shown) are arranged so as to be located on the opposite side of the opening 93 from the positions of the points F _b5 , F _c5 and F _d5 . However, the points F _b5 , F _c5 , and F _d5 include a plane Q ₅ that includes the position of the focal point F ₅ of the rotating body that forms the reflecting surface 95 and intersects perpendicularly to the optical axis Y ₅ of the reflecting mirror 89. , Intersection points with the central axes b ₅ , c ₅ , and d ₅ are shown, respectively. As an example, the distance between the focal point F ₅ and the center point A ₅ is 2.35 [mm], and the distance between the points F _b5 , F _c5 , F _d5 and the center points B ₅ , C ₅ , D ₅ is set. Each distance is 1.20 [mm]. Thus the central filament element 106 and the peripheral filaments elements 107,108,108, the center point of the center point _{A 5} and the peripheral filaments elements 107, 108 and 109 of the central filament element _{106 B 5, C 5, D} 5 is the reflector by arranging so as to be positioned on the opposite side to the opening 93 relative to the focal F ₅ of the reflecting surface 95 of the 89 regions contribute to central illuminance in the reflector 89, i.e. the neighboring region including the focal point F ₅ (Hereinafter referred to as “central illuminance contribution region”), the density of the filament body 102 can be increased, and the central illuminance can be increased.

Such a filament body 102 is accommodated in one cylindrical body having a central filament element 106 and peripheral filament elements 107, 108, 109 having an outer diameter (maximum outer diameter) r ₆ [mm]. The central filament element 106 and the peripheral filament elements 107, 108, 109 can be regarded as a single filament. In such a case, when the maximum inner diameter of the portion of the bulb 101 where the filament body 102 is located is R ₄ [mm], and the maximum outer diameter of the filament body 102 regarded as one filament is r ₆ [mm]. For reasons that will be described later, the relational expression 0.25 ≦ r ₆ / R ₄ ≦ 0.75 is satisfied.

The size of the maximum outer diameter r ₆ is the distance D ₈ between the maximum outer diameter r ₀ of the central filament element 106 and the peripheral filament elements 107, 108, 109 and two adjacent filament elements (or the distance D ₇ ). It is possible to adjust by appropriately changing. The maximum outer diameter r ₀ of the central filament element 106 and the peripheral filament elements 107, 108, 109 is determined by the coil length L _C3 of the central filament element 106, the coil length L _S3 of the peripheral filament elements 107, 108, 109, and the coil pitch. It can adjust by changing suitably.

Here, the coil length L _C5 of the central filament element 106 and the coil length L _S5 of the peripheral filament elements 107, 108, 109 may all be the same length. At that time, for example, in the case of a halogen bulb having a rated power of 65 [W], the coil length L _C5 and the coil length L _S5 are set within a range of 3.0 [mm] to 5.0 [mm]. Is preferred. The coil lengths L _S5 of the peripheral filament elements 107, 108, 109 are all the same, but the coil length L _C5 and the coil length L _S5 may be different. In this case, for example, in the case of a halogen bulb with a rated power of 65 [W], the coil length L _C5 is in the range of 3.5 [mm] to 15.0 [mm], and the coil length L _S5 is 1.5 [mm]. mm] to 4.5 [mm]. Furthermore, the coil length L _C5 and the coil length L _S5 may be different, and the coil length L _S5 of each peripheral filament element may also be different. In this case, for example, in the case of a halogen lamp with a rated power of 65 [W], the coil length L _C5 is set within the range of 3.5 [mm] to 15.0 [mm], and the coil length L _S5 is all It is preferable to set different values within a range of 1.5 [mm] to 4.5 [mm]. The pitch of the single-winding coil is set in the range of 0.05 [mm] to 0.07 [mm] in both the central filament element 106 and the peripheral filament elements 107, 108, and 109.

However, the maximum outer diameter r ₀ and the coil length L _S5 of the individual peripheral filament elements 107, 108, 109 make the illuminance irradiated from the peripheral filament elements 107, 108, 109 to the irradiation surface uniform. Therefore, it is preferable that at least one of the maximum outer diameter r ₀ and the coil length L _S5 has the same size, and it is more preferable that all the sizes have the same size. However, the maximum outer diameter r ₀ and the coil length L _S5 may vary between the individual peripheral filament elements 107, 108, 109 due to processing variations in the manufacturing process of the peripheral filament elements 107, 108, 109.

Further, the ends of the filament elements 106, 107, 108, 109 on the opening 93 side are preferably located in substantially the same plane. Thereby, the illumination intensity to the irradiation surface irradiated by each filament element 106,107,108,109 can be made uniform, and a uniform light distribution curve can be obtained.
Furthermore, the coil length L _C5 [mm] of the central filament element 106 and the coil lengths L _S5 [mm] of the peripheral filament elements 107, 108, 109 are 0.2 ≦ L _S5 / L _C5 ≦ 0. It is preferable that the relational expression 9 is satisfied. However, the coil lengths L _S5 of the peripheral filament elements 107, 108, 109 are substantially equal. Of course, “substantially equal” means that each coil length L _S5 varies due to variations in the coil manufacturing process as described above.

In that case, the distance D ₇ between the central filament element 106 and each of the peripheral filament elements 107, 108, 109 is set in the range of 0.1 [mm] to 2.2 [mm], respectively. Is preferred. Thereby, the density of the filament body 102 in the central illuminance contribution region contributing to the central illuminance in the reflecting mirror 89 can be further increased, the central illuminance can be further increased, and the central filament element 106 is lit during lighting. Arc discharge occurs between the peripheral filament elements 107 and 108 and 109, and the arc discharge can prevent the central filament element 106 and the peripheral filament elements 107, 108 and 109 from being disconnected. On the other hand, if the _{D 7} is less than 0.1 [mm], the lighting in an arc discharge is generated between the central filament element 106 and the peripheral filaments elements 107, 108, 109, the central filament element 106 by the arc discharge Or the peripheral filament elements 107, 108, 109 may be broken. Further, when the D ₇ exceeds 2.2 [mm], the density of the filament body 102 located in the central illuminance contribution region decreases, and the central illuminance cannot be sufficiently increased, or the peripheral filament element 107 , 108 and 109 increase the illuminance in the peripheral area of the central portion of the irradiation surface, and a desired beam angle, particularly a narrow beam angle (for example, 10 degrees, in which case the allowable range is 7.5 degrees to 12.5). May not be obtained).

  Here, as the coil constituting the central filament element 106 and the peripheral filament elements 107, 108, 109, a double-winding coil or a triple-winding coil can be used in addition to the single-winding coil, but the viewpoint of increasing the central illuminance. From the above, the pitch can be reduced as compared with the double winding coil and the triple winding coil, and the density of the filament body 102 located in the central illuminance contribution region contributing to the central illuminance in the reflecting mirror 89 is increased. It is preferable to use a single winding coil that can be used.

Next, when the maximum inner diameter of the portion of the bulb 101 where the filament body 102 is located is R ₄ [mm] and the maximum outer diameter of the filament body 102 is r ₆ [mm], 0.25 ≦ r ₆ The reason why it is defined so as to satisfy the relational expression / R ₄ ≦ 0.75 will be described.
First, the reflector with halogen bulb 88 rated power 65 described above [W], among the valve 101, the maximum inner diameter _{R 4} of the portion filament body 102 is positioned and fixed with 9 [mm], the filament 102 10 were produced by varying the maximum outer diameter r ₆ [mm] of each as shown in Table 4 by appropriately changing the distance D ₈ between two adjacent peripheral filament elements. Then, each manufactured product is lit at the rated power, and the number of filament bodies 102 that are disconnected until the lighting time of 3500 hours and the lighting time of 4000 hours, and among the number that the filament body 102 is not disconnected, is 4000. When the number of blackened parts on the inner surface of the bulb 69 when the time was turned on was examined, the same results as shown in Table 4 were obtained.

  In Table 4, in the “Presence / absence of disconnection” column, the denominator indicates the total number of samples, and the numerator indicates the number of the disconnected filament bodies 102 out of the total number of samples. In addition, in the “Presence of blackening” column, the number of samples in which the denominator was not disconnected out of the total number of samples, and the number of samples in which the numerator was blacked out of the number of samples in which the numerator was not disconnected is shown. Each is shown. However, in the determination of blackening, it is determined that “blackening is present” when it can be visually confirmed that black coloring matter is attached to the inner surface of the valve 101.

Moreover, as a lighting method, this was repeated for one cycle of lighting for 5.5 hours and turning off for 0.5 hours. The “lighting elapsed time” is an accumulated time of the lighting time.
In each sample produced, the central filament element 106 and the peripheral filament elements 107, 108, 109 all have a pitch of 0.05 [mm] to 0.07 [mm] and a maximum outer diameter r ₀ of 0.65 [mm]. mm]. However, the coil length L _C5 of the central filament element is 5.7 [mm], and the coil length L _S5 of the peripheral filament element is 3.4 [mm].

As apparent from Table 4, when the relational expression 0.25 ≦ r ₆ / R ₄ ≦ 0.75 is satisfied, for example, r ₆ / R ₄ = (0.25, 0.35, 0.50, 0. In the case of 75), none of the samples had the filament body 102 disconnected until the lapse of lighting for 3500 hours, and none of the inner surface of the bulb 101 was blackened. In particular, when satisfying the relational expression of 0.35 ≦ r ₆ / R ₄ ≦ 0.75, for example, when r ₆ / R ₄ = (0.35, 0.50, 0.75), any sample None of the filament bodies 102 was disconnected until the lapse of 4000 hours.

On the other hand, when satisfying the relational expression of 0.25> r ₆ / R ₄ , for example, when r ₆ / R ₄ = (0.20), 6 out of 10 samples are filament bodies before lapse of 4000 hours of lighting. 102 was disconnected, but no blackening occurred on the inner surface of the valve 101 in any of the four samples remaining without disconnection. Further, when the relational expression r ₆ / R ₄ > 0.75 is satisfied, for example, when r ₆ / R ₄ = (0.80), the filament body 102 is not used until lapse of 4000 hours in all of the ten pieces. However, blackening occurred on the inner surface of the valve 101 in all of the ten valves.

The reason for such a result is as described above.
Therefore, when the maximum inner diameter of the portion of the bulb 101 where the filament body 102 is located is R ₄ [mm] and the maximum outer diameter of the filament body 102 is r ₆ [mm], the inner surface of the bulb 101 is blackened. In order to prevent the filament body 102 from being disconnected and to prolong the service life, it has been found that the relational expression 0.25 ≦ r ₆ / R ₄ ≦ 0.75 should be satisfied. In particular, it was found that the relationship of 0.35 ≦ r ₆ / R ₄ ≦ 0.75 should be satisfied in order to further extend the life.

Next, assuming that the coil length of the central filament element 106 is L _C5 [mm] and the coil lengths of the peripheral filament elements 107, 108, 109 are L _S5 [mm], 0.2 ≦ L _S5 / L _C5 ≦ 0. The reason why it is defined to satisfy the relational expression 9 will be described.
First, regarding the halogen lamp 88 with a reflector having the rated power of 65 [W], the coil length L _C3 of the central filament element 106 and the coil lengths L _S3 of the peripheral filament elements 107, 108, 109 are various as shown in Table 5. Five pieces of each changed were produced. Then, each manufactured product was turned on at the rated power, and its beam angle (degrees) and central illuminance [lx] were examined. As shown in Table 5 and FIG. 31 (relationship between L _S3 / L _C3 and the beam angle). The following results were obtained. Further, as a typical light distribution curve, a case where L _S3 / L _C3 = 0.9 is shown in FIG. 32, and a case where L _S3 / L _C3 = 0.6 is shown in FIG.

In each sample produced, the maximum inner diameter R of the portion of the bulb 101 where the filament body 102 is located is 9.0 [mm]. Each of the central filament element 106 and the peripheral filament elements 107, 108, 109 is composed of a single coil, and the pitch is 0.05 [mm] to 0.07 [mm], and the maximum outer diameter r ₀ is 0.65 [mm]. ]. The maximum outer diameter r ₆ of the filament body 102 is 4.50 [mm]. The distance _{D 7} is 1.275 [mm].

In Table 5, “beam angle” indicates an average value of five samples. A beam angle of 10 degrees (allowable range: 7.5 degrees to 12.5 degrees), which is the mainstream of what is currently marketed as a narrow angle type, was used as an evaluation standard.
Further, “center illuminance” indicates an average value of five samples. Currently, in a commercially available halogen bulb with a reflector (hereinafter referred to as “conventional product”) with a rated power of 65 [W] (rated voltage 110 [V]) with a beam angle of 10 degrees, the central illuminance is, for example, 6500 [lx ] (6500 [cd] in terms of central luminous intensity). Therefore, as an evaluation standard, considering the demand from the market and the like, it is increased by about 10% with respect to the central illuminance (6500 [lx]) of the conventional product, that is, 7200 [lx] (7200 [cd] in terms of central luminous intensity) The above was used as an evaluation standard.

As is apparent from Table 5, when the relational expression 0.2 ≦ L _S3 / L _C3 ≦ 0.9 is satisfied, for example, L _S3 / L _C3 = (0.2, 0.3, 0.4, 0. In the case of 5, 0.6, 0.7, 0.8, 0.9), the center illuminance exceeds 8500 [lx] (center light intensity conversion of 8500 [cd], which exceeds the center illuminance (6500 [lx]) of the conventional product. It was found that the beam angle was in the range of 7.5 to 12.5 degrees, and all satisfied the above evaluation criteria. This is clear from the light distribution curves shown in FIGS. 32 and 33, and the illuminance at the central portion on the irradiation surface is high, and the irradiation light does not spread to the peripheral region of the central portion.

On the other hand, when the relational expression L _S3 / L _C3 > 0.9 is satisfied, for example, when L _S3 / L _C3 = (1.0), the central illuminance exceeds the central illuminance (6500 [lx]) of the conventional product. Although the above evaluation criteria were satisfied, the beam angle was 13.0 degrees, and it was found that the above evaluation criteria were not satisfied. Further, when the relational expression L _S3 / L _C3 <0.2 is satisfied, for example, when L _S3 / L _C3 = (0, 0.1), the beam angle is 7.5 degrees, and the above-described evaluation criteria. However, it was found that the central illuminance does not satisfy the above evaluation criteria.

The reason for this result is considered as follows.
That is, the relational expression L _S3 / L _C3 ≦ 0.9 is satisfied, and the coil length L _C3 of the central filament element 106 is relatively relative to the coil length L _S3 of the peripheral filament elements 107, 108, 109 within an appropriate range. By increasing the length, the coil L _S3 of the peripheral filament elements 107, 108, and 109, which greatly contributes to the increase and decrease of the illuminance in the peripheral area of the central portion on the irradiation surface, can be appropriately shortened. The coil length L _C3 of the central filament element 106 that greatly contributes to an increase or decrease in the illuminance (center illuminance) of the portion can be made as long as possible. As a result, first, it is possible to reduce the illuminance in the peripheral area of the central portion of the irradiated surface as much as possible while leaving the contribution of the peripheral filament elements 107, 108, 109 to the increase in illuminance with respect to the central portion of the irradiated surface. it can. Second, by increasing the coil length L _C3 of the central filament element 106, the illuminance to the central portion of the irradiated surface can be further increased. And it is thought that these results overlapped and the favorable light distribution curve as shown in FIG. 32 and FIG. 33 was obtained. However, if the relational expression L _S3 / L _C3 <0.2 is satisfied, the coil length L _C3 of the central filament element 106 becomes long, but the portion outside the central illuminance contribution region in the reflecting mirror 89 increases. The relative length of the coil length L _S3 of the peripheral filament elements 107, 108, 109 with respect to the coil length L _C3 of the central filament element 106 becomes too small, and the effect of installing the peripheral filament elements 107, 108, 109 is obtained. It is thought that it has decreased remarkably. On the other hand, when the relational expression L _S3 / L _C3 > 0.9 is satisfied, the coil length L _C3 of the central filament element 106 is sufficiently longer than the coil length L _S3 of the peripheral filament elements 107, 108, 109. Therefore, it is considered that the peripheral filament elements 107, 108, and 109 increase the illuminance in the peripheral area of the central portion on the irradiation surface, and a desired beam angle cannot be obtained.

Therefore, when the coil length of the central filament element 106 is L _C3 [mm] and the coil length of the peripheral filament elements 107, 108, 109 is L _S3 [mm], the central filament element 106 and the peripheral filament elements 107, 108, 109 In order to obtain a desired beam angle (narrow angle) and realize good light distribution characteristics while increasing the central illuminance by the contribution of both, a relational expression 0.2 ≦ L _S3 / L _C3 ≦ 0.9 I understood that I should satisfy.

  As described above, according to the configuration of the halogen bulb 88 with a reflector according to the eleventh embodiment of the present invention, the bulb 101 and the filament are similar to the halogen bulb 31 according to the eighth embodiment of the present invention described above. Since the convection layer generated between the body 102 and the body 102 can be made extremely thin, the amount of evaporation of tungsten, which is a constituent material of the filament body 102, can be remarkably reduced. It is possible to prevent the tungsten wire from being thinned and cut off, and to extend the life. In addition, since the gap between the bulb 101 and the filament body 102 is moderately maintained, it is possible to suppress both the bulb 101 and the filament body 102 from becoming abnormally hot during lighting. Can be prevented, or the inner surface of the bulb 101 can be prevented from blackening due to excessive evaporation of the filament body 102.

In particular, when the coil length of the central filament element 106 is L _C3 [mm] and the coil lengths of the peripheral filament elements 107, 108, 109 are L _S3 [mm], 0.2 ≦ L _S3 / L _C3 ≦ 0.9 By satisfying the following relational expression, the central illuminance is increased by the contribution of both the central filament element 106 and the peripheral filament elements 107, 108, and 109, and the spread of irradiation light by the peripheral filament elements 107, 108, and 109 is suppressed. Thus, a narrow beam angle can be obtained and good light distribution characteristics can be realized.

In particular, the distance D ₇ between the central filament element 106 and each peripheral filament element 107, 108, 109 is set to a range of 0.1 [mm] to 2.2 [mm], respectively. The density of the filament body 102 in the central illuminance contribution region can be further increased, the central illuminance can be extremely increased, and between the central filament element 106 and the peripheral filament elements 107, 108, 109 during lighting. It is possible to prevent arc discharge from occurring and disconnection of the central filament element 106 and the peripheral filament elements 107, 108, and 109 due to the arc discharge.

  In the eleventh embodiment, the case where the three peripheral filament elements 107, 108, and 109 are arranged so as to form a substantially equilateral triangle has been described. Or 5 peripheral filament elements arranged to form a substantially regular pentagon, 6 peripheral filament elements arranged to form a substantially regular hexagon, or more Even if it is a case, the effect similar to the above can be acquired.

  In the eleventh embodiment, the bulb 101 has been described as having a shape in which the tip-off portion 98, the substantially cylindrical light emitting portion 99, and the sealing portion 100 are successively formed. Not limited to this, a chip-off part (may not be present in some cases), a bulb in which a substantially spheroidal light emitting part and a sealing part are successively formed, and a chip-off part (may not be present in some cases) A bulb having a substantially spheroid shape, a bulb having a reduced diameter portion and a sealing portion successively formed, a tip-off portion (may not be present in some cases), a light portion having a substantially spheroid shape, Even when a well-known various shape valve such as a valve in which the reduced diameter portion, the cylindrical portion, and the sealing portion are sequentially formed is used, the same effect as described above can be obtained. Of course, instead of the above-described substantially spheroidal shape, a light emitting portion having a substantially spherical shape or a substantially composite ellipsoidal shape can also be used.

Further, in the eleventh embodiment, the outer shape of the cross section cut in a direction perpendicular to the central axes a5, b5, c5, d5 in the longitudinal direction so as to form a circular shape so that the tungsten wire has a cylindrical shape. The case of using the filament elements 106, 107, 108, and 109 formed of a single-wound coil wound on the wire has been described. However, the present invention is not particularly limited to its outer shape. For example, as shown in FIG. 28, the outer shape of a cross section cut perpendicularly to the central axes a5, b5, c5, and d5 in the longitudinal direction. Even when filament elements 74, 75, 76, 77 made of coils wound so as to draw an ellipse are used, the same effect as described above can be obtained.
(Embodiment 12)
Next, the illuminating device according to the twelfth embodiment of the present invention is used as general illumination such as a spotlight, and has a rated power of 65 according to the tenth embodiment of the present invention described above. The halogen lamp 31 of [W] has a configuration attached to various known lighting fixtures (not shown).

A lighting fixture is usually formed with a planar or curved reflector or a concave reflector. The radiated light emitted from the halogen bulb 31 is reflected by the reflecting plate or the reflecting mirror, and is irradiated from the light irradiation opening of the lighting fixture.
According to the configuration of the lighting apparatus according to the twelfth embodiment of the present invention, a long-life lighting apparatus can be realized.
(Embodiment 13)
Next, the illuminating device according to the thirteenth embodiment of the present invention is used as general illumination such as a spotlight, for example, and has a rated power of 65 according to the above-described ninth embodiment of the present invention. The halogen lamp 53 of [W] has a configuration attached to various known lighting fixtures (not shown).

  The luminaire is provided with a concave reflecting mirror portion whose reflection surface is a spheroid or a paraboloid. However, the reflecting mirror portion may be fixed to the lighting fixture and cannot be replaced, or may be replaceable according to the intended use. The radiated light emitted from the halogen bulb 53 is reflected by the reflecting mirror portion and irradiated from the light irradiation opening of the lighting fixture.

According to the configuration of the lighting apparatus according to the thirteenth embodiment of the present invention, a long-life lighting apparatus can be realized.
(Embodiment 14)
Next, the illumination device according to the fourteenth embodiment of the present invention is used as general illumination such as a spotlight, for example, and has a rated power of 65 according to the tenth embodiment of the present invention described above. A halogen lamp 79 with a reflector [W] has a configuration in which it is attached to various known lighting fixtures (not shown).

According to the configuration of the illumination device according to the fourteenth embodiment of the present invention, a long-life illumination device can be realized.
(Embodiment 15)
Next, the illumination device according to the fifteenth embodiment of the present invention is used as general illumination such as a spotlight, for example, and has a rated power of 65 according to the eleventh embodiment of the present invention described above. A halogen lamp 88 with a reflecting mirror of [W] has a configuration attached to various known lighting fixtures (not shown).

According to the configuration of the illumination device according to the fifteenth embodiment of the present invention, a long-life illumination device can be realized.
In each of the above-described embodiments, the case where a halogen light bulb with a rated power of 65 [W] is used has been described. However, the present invention is not limited thereto, and for example, a halogen light bulb with a rated power of 20 [W] to 150 [W] is used. Even in this case, the same effect as described above can be obtained.

  In each of the above-described embodiments, the case where a halogen bulb is used has been described. However, even when various known incandescent bulbs are used instead of this type of halogen bulb, the same effect as described above can be obtained. Is.

The present invention can reduce the size of the light emitter without using multiple winding coils, can improve the light collection efficiency, is easy to manufacture, and has high mass productivity.
In addition, while increasing the central illuminance, it is possible to achieve good light distribution characteristics, especially with a narrow-angle beam angle type, and there is a demand for miniaturization required for general lighting, especially for store lighting. As well as responding to the demands that display products stand out,
Furthermore, since the lifetime can be extended, the life cycle of the tube can be extended, the inconvenience of replacing the bulb can be reduced, and its industrial applicability is very wide and large.

In Embodiment 1, it is the schematic block diagram which notched one part of the illuminating device with which a halogen light bulb was integrated in the lighting fixture provided with the reflective mirror. In Embodiment 1, it is the schematic block diagram which notched some halogen light bulbs which are due to be integrated in an illuminating device. FIG. 3 is a schematic perspective view showing a lead wire and a support wire that support a filament body provided in the halogen light bulb in the first embodiment. FIG. 3 is a schematic perspective view showing a filament body provided in a bulb of a halogen light bulb, a lead wire supporting the filament body, and a support wire in the first embodiment. FIG. 3 is a schematic cross-sectional view of the filament body provided in the halogen light bulb according to Embodiment 1 cut in a direction perpendicular to the bulb axis direction. FIG. 6 is a schematic perspective view showing a lead wire and a support wire that support a filament body provided in the halogen light bulb in the second embodiment. It is the schematic perspective view which showed the filament body provided in the bulb | bulb of the halogen bulb in Embodiment 2, and the lead wire and support wire which support it. FIG. 6 is a schematic cross-sectional view of a filament body provided in the halogen light bulb according to Embodiment 2 cut in a direction perpendicular to the bulb axis direction. It is the characteristic view which showed the relationship between the center illumination intensity in the filament body of Embodiment 1 and Embodiment 2, and the distance between filament element (coil) winding axes from the result of a simulation test. It is the characteristic view which showed the relationship between the center illumination intensity and the distance between filament element (coil) winding axis | shafts from the result of a simulation test in the filament body which has three filament elements of Embodiment 2. FIG. It is the characteristic view which showed the relationship between the clearance gap between filament elements and center illumination intensity in the filament body which has three filament elements of Embodiment 2 from the result of the measurement test. FIG. 10 is a characteristic diagram showing the relationship between the gap between the filament elements and the beam angle in the filament body having the three filament elements according to the second embodiment from the results of the actual measurement test. It is the schematic block diagram which showed typically the coil arrangement | positioning in the plane perpendicular | vertical to a coil axis | shaft about each sample used for the center illumination intensity and light distribution characteristic evaluation test of Embodiment 2. FIG. 6 is a schematic cross-sectional view of a halogen lamp with a reflector in a third embodiment. FIG. FIG. 10 is a schematic configuration diagram in which a part of a halogen light bulb with a reflector in Embodiment 5 is cut away. It is the schematic sectional drawing which cut | disconnected the filament body with which the halogen light bulb with a reflector in Embodiment 5 was equipped in the optical axis direction. It is the schematic sectional drawing which cut | disconnected the filament body with which the halogen light bulb with a reflector in Embodiment 5 was equipped in the direction perpendicular | vertical to an optical axis direction. FIG. 10 is a characteristic diagram showing the relationship between the ratio of the axial length of the central filament element and the axial length of the peripheral filament element and the beam angle in the halogen bulb with a reflector according to the fifth embodiment. FIG. 10 is a characteristic diagram showing a light distribution curve when the ratio of the axial length of the central filament element to the axial length of the peripheral filament element is 0.9 in the halogen light bulb with a reflector according to the fifth embodiment. FIG. 10 is a characteristic diagram showing a light distribution curve when the ratio of the axial length of the central filament element to the axial length of the peripheral filament element is 0.6 in the halogen light bulb with a reflector according to the fifth embodiment. FIG. 20 is a schematic configuration diagram in which a part of a halogen light bulb in Embodiment 8 is cut away. FIG. 10 is a schematic cross-sectional view of a filament body provided in a halogen light bulb in Embodiment 8 cut in the bulb axis direction. FIG. 10 is a schematic cross-sectional view of a filament body provided in a halogen light bulb in Embodiment 8 cut in a direction perpendicular to the bulb axis direction. FIG. 20 is a schematic cross-sectional view of another variation of the filament body provided in the halogen light bulb in the eighth embodiment, cut in a direction perpendicular to the bulb axis direction. In Embodiment 9, it is the schematic block diagram which notched one part of the illuminating device with which a halogen bulb was integrated in the lighting fixture provided with the reflective mirror. It is the schematic sectional drawing which cut | disconnected the filament body with which the halogen bulb in Embodiment 9 and Embodiment 12 was equipped in the optical axis direction. It is the schematic sectional drawing which cut | disconnected the filament body with which the halogen bulb in Embodiment 9 and Embodiment 12 was equipped in the direction perpendicular | vertical to an optical axis direction. FIG. 23 is a schematic cross-sectional view in which another variation of the filament body provided in the halogen light bulb in the ninth embodiment is cut in a direction perpendicular to the optical axis direction. FIG. 11 is a schematic configuration diagram in which a part of a halogen light bulb with a reflector in Embodiment 10 is cut away. FIG. 16 is a schematic configuration diagram in which a part of a halogen light bulb with a reflector in Embodiment 11 is cut away. In the halogen bulb with a reflector according to the eleventh embodiment, it is a characteristic diagram showing the relationship between the ratio of the axial length of the central filament element to that of the peripheral filament element and the beam angle. In the halogen bulb with a reflector according to the eleventh embodiment, a characteristic diagram showing a light distribution curve when a ratio of an axial length of a central filament element and an axial length of a peripheral filament element is 0.9. . FIG. 24 is a characteristic diagram showing a light distribution curve when the ratio of the axial length of the central filament element to the axial length of the peripheral filament element is 0.6 in the halogen bulb with a reflector according to the eleventh embodiment. . It is the characteristic view which showed the light distribution curve in the conventional halogen bulb with a reflecting mirror.

Explanation of symbols

1,79,88 Halogen bulb with reflector 2,80,89,112,138 Reflector 3,31,53,90,114,139 Halogen bulb 4,34,81,91,116,140 Base 4a, 4b, 35a, 35b, 92a, 92b, 117a, 117b, 141a, 141b Terminal portion 5, 57, 59, 82, 93, 111, 143 Opening portion 6, 83, 94, 144 Neck portion 7, 61, 84, 95, 119 , 145 Reflective surface

8, 60, 85, 96, 118, 146 Front glass 9, 33, 87, 97, 121, 147 Adhesive 10, 36, 62, 98, 122, 149 Chip-off part 11, 37, 63, 99, 123, 150 Light emitting part 12, 40, 66, 100, 120, 148 Sealing part 13, 32, 56, 101, 115, 142 Bulb 14, 42, 52, 68, 78, 102 Filament body 15, 43, 69, 103 Inside Lead wire 16, 44, 104, 129 Metal foil 17, 45, 105, 128 Internal lead wire 18 Assembly 19, 70, 74, 106 Central filament element 20, 21, 22, 71, 72, 73, 75, 76, 77, 107, 108, 109 Peripheral filament element 38, 64, 124 Reduced diameter portion 39, 65, 125 Tube portion 41, 67, 126 Possible Visible light transmitting infrared reflecting film 46, 47, 48, 49, 50, 51 Filament element 54, 110, 137 Illuminating device 55 Reflecting mirror part 58, 113 Lighting fixture 86 Fastener 127, 135, 136 Filament body 130 External lead wire 131 , 132, 133, 134 Coils (filament elements)
228 Support line 328 Stem glass

Claims (31)

A tube having a rated voltage set to 100 [V] or more and 250 [V] or less, which is incorporated in the reflector of the illumination device,
A valve and a filament body provided in the valve;
The filament body has a plurality of filament elements and is arranged so as to include the focal point of the reflector in a state where the tube is incorporated in the reflector.
Each of the plurality of filament elements is a single-wound coil, one is arranged on the optical axis of the reflecting mirror, and one or more of the remaining coils are arranged on an axis parallel to the optical axis. And
Each of the plurality of filament elements is formed so that an outline when viewed from the winding axis direction is different from a substantially circular shape. A concave reflecting mirror, and a tube disposed in the reflecting mirror and having a rated voltage set to 100 [V] or more and 250 [V] or less,
The tube has a bulb and a filament body provided in the bulb,
The filament body has a plurality of filament elements, and is disposed so as to contain the focal point of the reflector.
Each of the plurality of filament elements is a coil wound in a single winding, one on the optical axis of the reflector, and one or more of the remaining coils on an axis parallel to the optical axis,
Each of the plurality of filament elements is formed so that a contour when viewed from the winding axis direction is different from a substantially circular shape.   The tube according to claim 1, wherein the contour is flat.   3. The tube with a reflector according to claim 2, wherein the outline is flat.   The tube according to claim 1, wherein the contour is a rectangle, a substantially track shape, or an oval shape.   The tube with a reflector according to claim 2, wherein the outline is rectangular, substantially track-shaped, or oval.   The tube according to claim 1, wherein the plurality of filament elements is three.   The tube with a reflector according to claim 2, wherein the number of the plurality of filament elements is three.   The tube according to claim 7, wherein the three filament elements are provided in the bulb so that respective axes are arranged on the same plane.   The tube with a reflector according to claim 8, wherein the three filament elements are provided in the bulb so that respective axes are arranged on the same plane.   2. The reflection mirror according to claim 1, wherein a reflection surface of the reflection mirror is a spheroidal outer peripheral surface or a parabolic surface, and an inner diameter of the opening is 30 [mm] or more and 100 [mm] or less. Tube.   3. The reflection mirror according to claim 2, wherein a reflection surface of the reflection mirror is a spheroid outer peripheral surface or a rotation paraboloid, and an inner diameter of the opening is 30 [mm] or more and 100 [mm] or less. Tube with reflector.   An illumination apparatus comprising: a lighting fixture having a reflecting mirror therein; and the tube according to claim 1 incorporated in the reflecting mirror section.   An illuminating apparatus, wherein the tube with a reflector according to claim 2 is attached to a luminaire. A concave reflecting mirror and a tube disposed in the reflecting mirror;
The tube has a bulb and a filament body provided in the bulb,
The filament body includes a linear central filament element whose longitudinal center axis is substantially located on the optical axis of the reflecting mirror, and a longitudinal central axis around the central filament element. At least three peripheral filament elements arranged to be substantially parallel to the longitudinal central axis of
When the peripheral filament elements connect the intersections of the longitudinal central axis of each of the peripheral filament elements and the plane perpendicular to the longitudinal central axis of the central filament element, the longitudinal length of the central filament element Arranged so that a substantially regular polygon having the center of gravity or centroid as the intersection of the central axis of the direction and the plane is formed,
The length L _C in the longitudinal direction of the central filament element and the length L _S in the longitudinal direction of the peripheral filament element are adjusted so that L _S / L _C is 0.2 or more and 0.9 or less. A tube with a reflector. Reflection of the distance _D 1 [mm] is claim 15, wherein the respective at 0.1 [mm] or more 2.2 [mm] or less between the peripheral filaments element of the central filament element and each Tube with mirror. A bulb incorporated in the reflector portion of the illumination device, the bulb having a bulb and a filament body provided in the bulb;
The filament body includes a linear central filament element whose longitudinal center axis is substantially located on the optical axis of the reflector portion when the tube is incorporated in the reflector portion, and the center filament element And at least three peripheral filament elements arranged so that a longitudinal central axis is substantially parallel to a longitudinal central axis of the central filament element;
The peripheral filament elements are connected to each other at the intersection of the longitudinal central axis of each of the peripheral filament elements and a plane perpendicular to the longitudinal central axis of the central filament element. Arranged so as to form a substantially regular polygon whose center of gravity or centroid is the intersection of the central axis in the longitudinal direction and the plane,
The length L _C in the longitudinal direction of the central filament element and the length L _S [mm] in the longitudinal direction of the peripheral filament element are adjusted so that Ls / Lc is 0.2 or more and 0.9 or less. A tube characterized by 18. The reflection according to claim 17, wherein a distance D ₁ [mm] between the central filament element and each of the peripheral filament elements is 0.1 [mm] or more and 2.2 [mm] or less. Tube with mirror   17. A lighting device, wherein the bulb with a reflector according to claim 15 or 16 is attached to a lighting fixture.   An illumination apparatus comprising: a lighting fixture having a reflecting mirror portion therein; and the tube according to claim 17 or 18 incorporated in the reflecting mirror portion. A bulb and a filament body disposed inside the bulb and having at least three linear filament elements;
The filament element has a forested state in which the central axis in the longitudinal direction is substantially parallel to the central axis in the longitudinal direction of the bulb and surrounds the central axis in the longitudinal direction of the bulb. When connecting the intersections of the central axis in the longitudinal direction of the element and the plane perpendicular to the central axis in the longitudinal direction of the bulb, the intersection of the longitudinal central axis of the bulb and the plane is the center of gravity or the figure. Arranged so as to form a substantially regular polygon as a center,
Among the bulbs, the maximum inner diameter R of the portion where the filament body is located and the maximum outer diameter r of the filament body are adjusted so that r / R is not less than 0.25 and not more than 0.75. A tube characterized by being. A tube incorporated in the reflector part of the illumination device, the tube having a bulb and a filament body arranged inside the bulb;
The filament body includes a linear central filament element whose longitudinal center axis is substantially located on the optical axis of the reflector portion when the tube is incorporated in the reflector portion, and the center filament element And at least three peripheral filament elements arranged so that a longitudinal central axis is substantially parallel to a longitudinal central axis of the central filament element;
The peripheral filament elements are connected to each other at the intersection of the longitudinal central axis of each of the peripheral filament elements and a plane perpendicular to the longitudinal central axis of the central filament element. Arranged so as to form a substantially regular polygon whose center of gravity or centroid is the intersection of the central axis in the longitudinal direction and the plane,
Among the bulbs, the maximum inner diameter R of the portion where the filament body is located and the maximum outer diameter r of the filament body are adjusted so that r / R is not less than 0.25 and not more than 0.75. A tube characterized by being. The length L _C in the longitudinal direction of the central filament element and the length L _S in the longitudinal direction of the peripheral filament element are adjusted so that Ls / Lc is 0.2 or more and 0.9 or less. The tube of claim 22. The central filament element and each of the peripheral filaments element respectively the distance D ₁ is between 0.1 [mm] or more 2.2 [mm] according to claim 23, wherein the tube, characterized in that less.   23. A concave reflecting mirror and a tube according to claim 21 disposed in the reflecting mirror, wherein the central axis of the bulb in the longitudinal direction of the bulb and the optical axis of the reflecting mirror are substantially on the same axis. A tube with a reflector, characterized by being located in A concave reflecting mirror, and a tube disposed in the reflecting mirror and having a bulb and a filament body provided in the bulb,
The filament body includes a linear central filament element whose longitudinal center axis is substantially located on the optical axis of the reflecting mirror, and a longitudinal central axis around the central filament element. At least three peripheral filament elements arranged to be substantially parallel to the longitudinal central axis of
The peripheral filament elements are connected to each other at the intersection of the longitudinal central axis of each of the peripheral filament elements and a plane perpendicular to the longitudinal central axis of the central filament element. Arranged so as to form a substantially regular polygon whose center of gravity or centroid is the intersection of the central axis in the longitudinal direction and the plane,
Among the bulbs, the maximum inner diameter R of the portion where the filament body is located and the maximum outer diameter r of the filament body are adjusted so that r / R is 0.25 or more and 0.75 or less. A tube with a reflector, characterized by The length L _C in the longitudinal direction of the central filament element and the length L _S in the longitudinal direction of the peripheral filament element are adjusted so that Ls / Lc is 0.2 or more and 0.9 or less. The tube with a reflector according to claim 26. Reflector with tube according to claim 27, wherein the distance D ₁ is respectively 0.1 [mm] or more 2.2 [mm] or less between the peripheral filaments element of the central filament element and each ball.   An illuminating device comprising the tube according to claim 21 attached to a luminaire.   An illuminating device comprising: a lighting fixture having a reflecting mirror portion therein; and the tube according to any one of claims 22 to 24 incorporated in the reflecting mirror portion.   29. A lighting device, wherein the bulb with a reflector according to any one of claims 25 to 28 is attached to a lighting fixture.

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