WO2007132749A1 - Bulb, bulb with reflector, and lighting device - Google Patents

Abstract

A halogen lamp used in a state that it is assembled in a reflector, and particularly its filament are disclosed. The filament (60) comprises first, second, third light-emitting parts (62A, 64A, 66A) which are single coils and support wires (56, 58) for connecting the light-emitting parts in series in order of mention. The axis (CX) of each light-emitting part is parallel to the optical axis (R) of the reflector and present in the same plane (P). The ends (62B, 66B) of the first light-emitting part and the end (62C, 66C) of the third one are coaxial with the optical axis. The ends (64B, 64C) of the second light-emitting part is eccentric in the optical axial direction from the ends of the first and third light-emitting parts. Thus, a compact filament hardly causing arc discharge can be provided.

Description

 Specification

 Tubes, tubes with reflectors, and lighting devices

 Technical field

 TECHNICAL FIELD [0001] The present invention relates to a tube, a reflector-equipped tube, and a lighting device, and more particularly to an improvement technique of a filament body in a tube.

 Background art

 [0002] A halogen lamp with a reflector, which is a kind of a tube with a reflector, is a combination of a reflector with a concave reflecting surface and a halogen lamp, and, for example, for spot illumination in a store etc. It is used.

 The rogen light bulb has a configuration in which a filament body is housed in a hermetically sealed bulb. When a halogen bulb is used in combination with a reflector, the collection efficiency can be improved by making the filament body as compact as possible and concentrating the light emission area as much as possible on the focal position of the reflector. In this case, it is known that reducing the light emitting area particularly in the direction of the optical axis of the reflecting mirror is effective for improving the light collection efficiency.

 [0003] Generally, when the rated voltage [V], rated power [W], and rated life (for example, 3000 hours) of the halogen bulb are determined, the filament body is The wire diameter and length of the tan dastene wire to be configured are substantially fixed. Therefore, for example, it is difficult to achieve compactness of the filament body simply by shortening the length of the tundsten wire.

 Therefore, among halogen bulbs with a rated voltage of 100 [V] or higher, those that have been put to practical use generally use double-turn coils to achieve a compact filament body. In addition, Patent Document 1 discloses a halogen bulb using a triple-turn coil as a filament body for further compactness. According to this, if the lengths of the tungsten wires are the same, the overall length of the coil in the optical axis direction of the reflecting mirror can be shortened, and the light collection efficiency is improved.

[0005] While the force is increased, the more the number of coiled coils is increased, the more the external force is applied to the halogen bulb. When the shock force is applied, the amplitude of the vibration of the coil that occurs is increased, which causes a problem that it becomes easy to break the wire.

 While this problem can be solved, the filament body can be made compact (shortening in the optical axis direction). As a rogen light bulb, Patent Document 2 discloses a plurality of single coils wound in a cylindrical shape as a whole. Each single coil is disposed parallel to the optical axis of the reflecting mirror so as to be symmetrical with respect to the optical axis of the reflecting mirror. According to this, since the length in the optical axis direction is shortened as compared with the case where the equivalent of the plurality of single coils is manufactured by one single coil, the light collection efficiency is improved. Become. Also, since each coil is single-layered, the problems due to the above-mentioned vibration can be alleviated.

Further, as an improvement of this, Patent Document 3 discloses a configuration in which one of the plurality of single coils is disposed parallel to the optical axis of the reflecting mirror and at a position including the optical axis. Halogen bulbs are disclosed. The presence of the coil (that is, the light emitting portion) at the optical axis position causes a large difference in the obtained illuminance.

 Patent Document 1: Japanese Patent Application Laid-Open No. 2001-345077

 Patent Document 2: Japanese Patent Application Publication No. 6-510881

 Patent Document 3: JP-A-2002-63869

 Disclosure of the invention

 Problem that invention tries to solve

In the halogen bulbs described in Patent Documents 2 and 3, it is conceivable to shorten the light emitting region also in the direction orthogonal to the optical axis of the reflecting mirror in order to improve the light collection efficiency as much as possible. That is, it is conceivable to reduce the distance between single coils disposed substantially in parallel (the distance in the direction orthogonal to the optical axis of the reflecting mirror).

 If the distance between the coils is reduced too much under pressure, a spark discharge may occur between adjacent coils (light emitting parts), resulting in breakage of the coil wire.

[0008] In view of the above problems, the present invention provides a tube including a filament body having a plurality of single light emitting portions in a coil shape, wherein the tube is resistant to disconnection due to arc discharge. The purpose is Another object of the present invention is to provide a reflector-equipped tube having such a tube, and a lighting device. Means to solve the problem

 [0009] In order to achieve the above object, a tube according to the present invention is a tube that is used by being incorporated in a reflecting mirror having a concave reflecting surface, and hermetically sealed. A bulb, and a filament body having a configuration in which a plurality of single coil-shaped light emitting portions provided in the bulb and wound in a cylindrical shape are electrically connected in series via a conductor; In both of the two light emitting units adjacent in the series connection, the axes of the two light emitting units are temporarily parallel, and one end and the other end of the two light emitting units are respectively It is characterized in that the two light emitting parts are arranged in a posture in which the distance between the end parts on the side not connected by the conductor is longer than that in the aligned virtual state.

 In the filament body, the first, second, and third light emitting units are electrically connected in series in this order, and each light emitting unit has its axis centered on the reflection. The second light emitting portion is disposed between the first light emitting portion and the third light emitting portion so as to be substantially parallel to the optical axis of the mirror and substantially on the same plane. End portions of the first light emitting portion and the third light emitting portion are substantially aligned in the optical axis direction, and an end portion of the second light emitting portion is an end portion of the first and third light emitting portions. On the other hand, it is characterized by being relatively shifted in the optical axis direction.

 In the filament body, the first, second, and third light emitting units are electrically connected in series in this order, and the light emitting units have substantially the same axial center. While being on a plane, the second light emitting unit is disposed between the first light emitting unit and the third light emitting unit, and the first light emitting unit and the third light emitting unit are approximately the same. In addition to being parallel, the second light emitting unit is arranged to be inclined relative to the first and second light emitting units.

 Further, the filament body is formed by electrically connecting in series first, second and third light emitting parts in this order, and the second light emitting part has an axial center thereof The first light emitting portion and the third light emitting portion are divided into both sides orthogonal to the optical axis so as to sandwich the second light emitting portion. The respective axis centers are disposed in a three-dimensional crossing substantially perpendicular to the axis center of the second light emitting unit.

In the filament body, the first, second and third light emitting parts are electrically connected in series in this order, and the light emitting parts have substantially the same axial center. The second light emitting unit is disposed on a plane, and a second light emitting unit is provided between the first light emitting unit and the third light emitting unit. The light emitting unit is characterized in that its axial center is disposed substantially orthogonal to both axial centers of the first and second light emitting units.

Further, the filament body is configured by bending a filament coil in which a filament wire is flatly wound in a single layer at a substantially central portion in the longitudinal direction, and from the bending portion to one end of the filament coil It is characterized in that the first light emitting part is present between the parts and the second light emitting part between the other end.

 In order to achieve the above object, a reflecting mirror-equipped tube according to the present invention is characterized by having a reflecting mirror and the above-described tube incorporated in the reflecting mirror.

[0015] In order to achieve the above object, a lighting device according to the present invention is characterized by including a lighting fixture having a reflecting mirror and the above-described tube incorporated in the reflecting mirror. In order to achieve the above object, a lighting device according to the present invention is characterized by including a lighting device and the above-described reflector-equipped tube attached to the lighting device. Effect of the invention

 [0016] Since the tube according to the present invention has the above configuration, the light emitting units are connected by the conductors while achieving compactness of the filament body in which the plurality of light emitting units are connected in series via the conductor. It is possible to suppress the occurrence of arcing that occurs between the end portions on the side not being used, and it is possible to effectively prevent the disconnection.

 Brief description of the drawings

FIG. 1 is a partial cutaway view showing a schematic configuration of a lighting device according to Embodiment 1. FIG.

 FIG. 2 is a view showing a halogen light bulb constituting the above-mentioned lighting device.

 FIG. 3 is a perspective view showing a support structure of a filament body in the halogen bulb.

 FIG. 4 is a perspective view showing a state in which the filament body is supported by the support structure.

 FIG. 5 is a view for explaining a method of manufacturing a filament coil constituting the above-mentioned filament body.

 FIG. 6 is a schematic view showing a plan view (upper part) and a front view (lower part) of the filament coil.

 [FIG. 7] A schematic view showing a plan view (upper part) and a front view (lower part) of the filament body.

FIG. 8 is a schematic view showing a plan view (upper part) and a front view (lower part) of a filament body according to Modification 1 of the first embodiment. 圆 9) When the narrow angle reflector is combined with the filament body of Embodiment 1 (FIGS. 7 and 8) and when the same narrow angle reflector and the comparison filament body (FIG. 35) are combined It is a figure which shows the light distribution curve of.

10] It is a schematic diagram showing the top view (upper part) and front view (lower part) of the filament body which concerns on the modification 2 of the said Embodiment 1. FIG.

11] A schematic view showing a plan view (upper part) and a front view (lower part) of a filament body of Embodiment 2. [FIG.

12) A schematic view showing a plan view (upper part) and a front view (lower part) of a filament body according to a modification of the second embodiment.

13] A schematic view showing a plan view (upper part) and a front view (lower part) of a filament body of Embodiment 3. [FIG.

14] It is a figure which shows light distribution distribution at the time of combining the filament body (FIG. 13) of Embodiment 3, and a narrow angle reflecting mirror.

 FIG. 15 is a view showing a light distribution curve when the filament body (FIG. 13) of Embodiment 3 is combined with a narrow-angle reflecting mirror.

[Fig. 16] A schematic view showing a plan view (upper part) and a front view (lower part) of a filament body according to Modification 1 of the third embodiment.

 [FIG. 17] A schematic view showing a front view (left part) and a right side view (right part) of a filament body according to a modification 2 of the third embodiment.

18] A schematic view showing a plan view (upper part) and a front view (lower part) of a filament body of Embodiment 4. [FIG.

FIG. 19 is a schematic view showing a plan view (upper part) and a front view (lower part) of a filament body according to a modification of the fourth embodiment.

 FIG. 20 is a view showing a light distribution in the case where the filament body (FIGS. 18 and 19) of Embodiment 4 is combined with a wide-angle reflecting mirror.

 FIG. 21 is a view showing a light distribution curve in the case where the filament body (FIGS. 18 and 19) of Embodiment 4 is combined with a wide-angle reflecting mirror.

圆 22] A schematic view showing a plan view (upper part) and a front view (lower part) of the filament body of the fifth embodiment It is.

 FIG. 23 is a view showing respective light distribution curves when the halogen bulb and the reflecting mirror according to two examples in the fifth embodiment are combined.

[Fig. 24] A schematic view showing a plan view (upper part) and a front view (lower part) of a filament body according to a modified example 1-1 of the fifth embodiment.

FIG. 25 is a schematic view showing a plan view (upper part) and a front view (lower part) of a filament body according to Modification 1-2 of the fifth embodiment.

[Fig. 26] A schematic view showing a front view (upper part) and a lower view (lower part) of a filament body according to a second modification of the fifth embodiment.

FIG. 27 is a view showing a light distribution in the case where a filament body according to the second modification of the fifth embodiment and a reflecting mirror are combined.

 FIG. 28 is a perspective view showing a schematic configuration of a filament body and a supporting structure thereof according to a first example of the halogen bulb in the sixth embodiment.

 FIG. 29 is a schematic view showing a plan view (upper part) and a front view (lower part) of a filament body according to the first example of the halogen bulb in the sixth embodiment.

 FIG. 30 is a schematic view illustrating a front view of a filament body according to a second example of the halogen bulb in the sixth embodiment.

 FIG. 31 is a perspective view showing a schematic configuration of a support structure of a filament body and a filament according to a third example of the halogen bulb in the sixth embodiment.

 [FIG. 32] A perspective view showing a schematic configuration of a support structure of a filament body and a filament according to a fourth example of the halogen bulb in the sixth embodiment.

FIG. 33 is a diagram showing a schematic configuration of a reflecting-mirror-equipped halogen bulb according to the seventh embodiment. 34] It is the figure which illustrated the shape of the cross section of a flat cylinder (shape).

Fig. 35 is a schematic view showing a plan view (upper part) and a front view (lower part) of a comparative filament body.圆 36] It is a figure which shows light distribution distribution at the time of combining a comparison filament body (FIG. 35) and a narrow angle reflecting mirror.

[37] Fig. 35 is a diagram showing a light distribution curve in the case where a comparative filament body (Fig. 35) and a narrow angle reflector are combined. FIG. 38 is a view showing a light distribution when the comparative filament body (FIG. 35) and a wide-angle reflecting mirror are combined.

 FIG. 39 is a view showing a light distribution curve in the case where a comparative filament body (FIG. 35) and a wide-angle reflecting mirror are combined.

 Explanation of sign

[0018] 10 lighting devices

 12 Lighting fixtures

 14, 102 halogen bulbs

 18, 104 Reflector

 16 Bano Reb

 56, 58, 306, 412 Support line

 60, 72, 73, 74, 80, 82, 84, 86, 90, 96, 300, 310, 320, 324, 400, 50 2, 520 filament body

 62, 64, 66, 302, 304, 402, 504 filament coil

 62A, 64A, 66A, 302A, 304A, 402A1, 402A2, 504A1, 504A2 light emitting part

 100 halogen bulbs with reflector

 BEST MODE FOR CARRYING OUT THE INVENTION

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

 Embodiment 1

 FIG. 1 is a partial cutaway view showing a schematic configuration of a lighting apparatus 10 according to a first embodiment. In all the drawings including FIG. 1, the scale among the members is not uniform.

 The illumination device 10 is used as a spotlight in, for example, a house, a store, or a studio. The lighting device 10 includes a lighting fixture 12 and a halogen light bulb 14 shown as an example of a tube.

 The lighting fixture 12 has a bottomed cylindrical fixture main body 16 and a reflecting mirror 18 housed in the fixture main body 16.

To attach the base 30 (see Fig. 2) of the halogen bulb 14 to the bottom of the fixture body 16 Receptacle (not shown) is provided. In addition, the instrument main body 16 can be made into various well-known shapes not only cylindrically.

The reflector 18 is detachable from the instrument body 16 in order to make the halogen bulb 14 replaceable.

 The reflector 18 has a funnel-shaped hard glass substrate 20. A multi-layer interference film 22 constituting a reflection surface is formed on the concave portion 20A formed on the base 20 with a spheroidal surface or a paraboloid surface. The multilayer interference film 22 may be a metal film such as aluminum or chromium, silicon dioxide)), titanium dioxide (TiO 2), magnesium fluoride (MgF), sulfur

 twenty two

 It can be formed of zinc chloride (ZnS) or the like. The aperture diameter (mirror diameter) of the reflecting mirror 18 is 100 mm. In addition, you may form a facet in a reflective surface as needed.

 The reflector 18 has a front glass 24 provided at the opening of the base 20. In this example, the front glass 24 is fixed to the base 20, and the base 20 is configured to be detachable from the tool main body 16 in order to replace the halogen bulb 14. However, the present invention is not limited to this. The tool may be fixed to the main body, and the front glass may be detachable from the base.

 The rogen bulb 14 is attached to the receptacle (not shown) and incorporated in the reflector 18 for use. In the incorporated (attached) state, the central axis B of the bulb 26 described later of the halogen bulb 14 and the optical axis R of the reflecting mirror 18 are positioned approximately coaxially. The halogen bulb 14 is a bulb whose rated voltage is set to 100 [V] or more and 150 [V] or less and whose rated power is set to 100 [W] or less.

 FIG. 2 shows a partially cutaway front view of the halogen bulb 14.

 The halogen bulb 14 has a hermetically sealed bulb 26 and, for example, an E-type cap 30 secured to the side of the bulb 26 on the later-described sealing portion 38 by an adhesive 28.

 The sleeve 26 has a chip-off portion 32 which is a residual mark of sealing cut, a filament body storage portion 34 for storing a filament body 60 described later, a cylindrical portion 36 having a substantially cylindrical shape, and a known pinch seal method. The formed sealing portion 38 has a structure connected in this order.

As shown in FIG. 2, the filament body storage portion 34 has a substantially spheroidal shape. The term “substantially spheroid shape” as used herein is meant to include not only a perfect spheroid shape, but also a shape deviated from a perfect spheroid shape by the degree of variation in processing of the glass. I am tasting it. The filament housing portion is not limited to the above-described shape, and may be, for example, a substantially cylindrical shape, a substantially spherical shape, or a substantially complex ellipsoidal shape.

 Further, the structure of the valve is not limited to the one described above. For example, the tip-off portion (which may not be present in some cases), the filament housing portion, and the sealing portion may be connected in this order. .

 An infrared ray reflective film is formed on the outer surface of the filament housing 34. However, the infrared ray reflective film is not necessarily required but is appropriately formed.

In the valve 26, predetermined amounts of a halogen substance and a rare gas are enclosed. In addition to this, nitrogen gas may be enclosed.

 The halogen source material is used to return tungsten, which is its constituent material, which has evaporated from the filament 60, back to the filament 60 by a halogen cycle during lighting to prevent the bulb 26 from blackening. The concentration of the halogen substance is preferably in the range of 10 ppm to 300 ppm. In order to activate the halogen cycle, the coldest temperature on the inner surface of the noble metal 26 is preferably 200 ° C. or higher. Furthermore, in order to function the halogen balance properly, the oxygen concentration in the valve 26 is preferably 100 ppm or less.

It is preferable to use krypton gas as the rare gas. By using krypton gas, in order to compact the filament body 60 for the purpose of enhancing the light collection efficiency, as described later, although the light emitting portions are disposed close to each other, any desired portion between the adjacent light emitting portions is provided. At the place, when the lamp is turned on, arc discharge occurs, and it is possible to obtain a good effect by suppressing disconnection. In particular, the enclosed gas contains krypton as its main component and contains nitrogen gas and a halogen substance, and the gas pressure at normal temperature in the valve 26 should be set in the range of 2 [atm] to 10 [atm]. Is preferred. If the gas pressure exceeds 10 [atm], there is a risk that the luminaire may be broken by flying fragments if the core 26 is broken, while if it is less than 2 [atm], the filament body This is because the lamp life, in which tungsten, which is the constituent material of 60, easily evaporates, is shortened. In other words, since the gas pressure is appropriately suppressed in the above-mentioned range of the gas pressure, the fragments do not scatter with a force that the lighting apparatus is broken even if the valve 26 is broken, and Since the gas pressure is moderately high, the constituent material of filament body 60 In the range where it is possible to realize long life beyond evaporation of tungsten, which is an arc, and generate arc discharge at the time of lighting at any place between the adjacent light emitting parts at the time of lighting. It is.

 When nitrogen gas is included in the filling gas, the composition ratio of nitrogen gas is preferably set in the range of 8% to 40%. If the compositional ratio force of nitrogen gas exceeds 0 [%], the heat generated by the filament 60 during the lighting may be released excessively through the nitrogen gas, which may reduce the efficiency, while 8 [%] If it is less than this, it is likely that an arc discharge will occur between the adjacent light emitting parts at the time of lighting and a disconnection will occur immediately. In other words, since the above-mentioned composition ratio range of nitrogen gas is appropriately controlled by the nitrogen gas composition ratio, the heat generated by filament body 60 is excessively released through the nitrogen gas during lighting. As a result, it is possible to prevent the efficiency from being lowered, and because the nitrogen gas is appropriately contained, it is possible to suppress the occurrence of the arc discharge between the adjacent light emitting parts at the time of lighting and the disconnection. It is a range that can be done.

 In the sealing portion 38, a pair of metal foils 40 and 42 are sealed. The metal foils 40 and 42 are made of molybdenum. In addition, in order to prevent the airtightness of the valve 26 from being damaged due to the acidity caused by the overheating of the metal foils 40 and 42 sealed to the sealing portion 38, the surface of the sealing portion 38 is made uneven. It is preferable to increase the surface area and improve the heat dissipation at the sealing portion 38.

 One end of the external lead wire 44 is connected to one end of the metal foil 40. One end of the outer lead wire 46 is bonded to one end of the metal foil 42 and electrically connected. The external leads 44, 46 are made of tungsten. The other ends of the external lead wires 44 and 46 are led out of the valve 26 and are electrically connected to the terminal portions 48 and 50 of the base 30, respectively.

Here, a fuse (not shown) is provided between at least one of the two external lead wires 44 and 46 and the corresponding terminal portion (48 or 50) of the base 30. It is preferable to keep it in mind. By providing the fuse, even if a break occurs in the light emitting portion and an arc discharge occurs at the break portion, the fuse is immediately fused to interrupt the continuation of the arc discharge, and the bulb is struck by the impact of the arc discharge. 26 can be prevented from being damaged or the like. In particular, In the case where a number of light emitting parts are arranged in proximity, it is preferable to provide a fuse between each of the external lead wires 44 and 46 and the corresponding terminal parts 48 and 50 of the base 30, respectively. In this case, arc discharge may occur between adjacent light emitting parts even if arc discharge is not generated due to disconnection in the light emitting part.

One end portion of the internal lead wire 52 is connected to the other end portion of the metal foil 40. One end portion of the inner lead wire 54 is joined to the other end portion of the metal foil 42 and electrically connected. . The inner leads 52, 54 are made of tungsten. One end of the inner lead wire 52, 54 is supported by the seal 38 of the valve 26. The inner leads 52, 54 supply external power supplied through the base 30 to the filament body 60 and also serve as a support member for supporting a portion of the filament body 60 directly.

FIG. 3 is a perspective view showing a support structure for supporting the filament body 60, and FIG. 4 is a perspective view showing a state in which the filament body 60 is supported by the support structure.

 As shown in FIG. 3, as a supporting member for directly supporting a part of the filament body 60, there are support wires 56, 58 force. The support wires 56, 58 are made of tungsten.

 The inner lead wires 52, 54 and the support wires 56, 58 are sandwiched by a pair of cylindrical stem glasses 57, 59. As a result, the support wires 56 and 58 are supported, and the relative positions between the inner leads 52 and 54 and the support wires 56 and 58 are maintained.

As shown in FIG. 4, the filament body 60 also includes a plurality of (in this example, three) first to third filament coils 62, 64, 66. The first to third filament coils 62, 64, 66 are obtained by winding a tandasten wire as described later.

 The inner lead wires 52, 54 and the support wires 56, 58 are inserted into the end portions of the filament coils 62, 64, 66 and bent in a "C" shape for supporting the filament coils 62, 64, 66. It has one or two parts (hereinafter this part is called "coil support").

Here, the first filament coil 62 is supported by the coil support portion 52A (see FIG. 3) of the inner lead wire 52 and the coil support portion 56A (see FIG. 3) of the support wire 56.

 The second filament coil 64 is supported by a coil support portion 56B (see FIG. 3) of the support wire 56 and a coil support portion 58A (see FIG. 3) of the support wire 58.

The third filament coil 66 has a coil support 58B (see FIG. 3) and a lead wire of the support wire 58. And 54 coil supports 54A (see FIG. 3).

 Further, since both support wires 56 and 58 are formed by bending a single tungsten wire, coil support portions 56A and 56B in support wire 56 are connected to each other, and coil support portion 58A in support wire 58 is formed. , 58B are connected with each other. Therefore, the first to third filament cores 62, 64, 66 are electrically connected in series in this order with the inner lead wires 52, 54 and support wires 56, 58 attached. Become. Thus, the support wires 56, 58 also function as conductive connecting members for electrically connecting one ends of adjacent filament coils.

 In the state shown in FIG. 4, when power is supplied from the internal lead wires 52 and 54, the first to third filament coils 62, 64 and 66 are parts where the coil support is inserted (the coil support is fitted). In the part where it is mounted, it emits light between the coil support parts without light emission (non-light emission part). Here, the portions between the coil support portions in each of the filament coils 62, 64, 66 (that is, the light emitting portions) are defined as first to third light emitting portions 62A, 64A, 66A, respectively. That is, the filament body 60 has a plurality of (in this example, three) first to third light emitting portions 62A, 64A, 66A in a single coil shape.

 Further, as shown in FIG. 4, the first to third filament coils 62, 64, 66 (first to third light emitting portions 62A, 64A, 66A) are wound in a flat cylindrical shape. It is in the form of a single coil (hereinafter abbreviated as "flat coil"). The reason for this shape is as follows. That is, compared with the conventional single coil (hereinafter referred to as “cylindrical coil”) wound in a cylindrical shape as described in Patent Document 2 and Patent Document 3 (flat) (If the short axis length of the cylinder and the diameter of the cylinder are equal) The relationship in which the wire length per turn can be increased. If the wire length of the tungsten wire is the same, the coil length can be shortened. Thus, the filament coil (light emitting portion) can be reduced in the optical axis direction of the reflecting mirror. In addition, although the length in the direction intersecting the optical axis of the reflecting mirror is longer than that of the coil wound in a cylindrical shape by flattening the coil, for improvement of the light collection efficiency, the optical axis intersects with the optical axis. The effect of shortening in the direction of the optical axis is greater than the direction, so no problem.

[0038] Filament coils 62, 64, 66, which are flat coils, are manufactured as follows.

That is, as shown in FIG. 5, a plurality of cylindrical core wires (mandrels) 68 (shown as an example) In this case, two tungsten wires 70 are wound around the outer periphery of the two pieces arranged in parallel and closely in a row, and then the core 68 is removed. Alternatively, the core wire 68 may be dissolved and removed after winding the tungsten wire 70.

The upper part of FIG. 6 schematically shows a plan view of the first filament coil 62 as viewed in force in the direction of the coil axis CX, and the lower part of FIG. It is a schematic representation of the figure.

 Since all of the first to third filament coils 62, 64, 66 have substantially the same form, the first filament coil 62 will be described as a representative.

 As shown in the upper part of FIG. 6, the first filament coil 62 is formed by connecting corresponding ends of two line segments arranged in parallel with each other by a semicircle, as viewed from the coil axis CX direction. It has a so-called (track and field) track shape. This shape is derived from the above-described manufacturing method, and the more the number of core wires 68, the flatter the track shape. That is, with the number of core wires 68, it is possible to adjust the degree of flattening!

 Here, the flatness is defined as a value obtained by dividing the length of the major axis LX at the inner periphery of the first filament coil 62 by the length of the minor axis SX. In this example, the flatness is a value of an integer because the above-described manufacturing method is adopted, and for example, the flatness is “2”.

 Further, as described above, as shown in the lower part of FIG. 6, the first filament coil 62 includes the non-light emitting portion 62B at both end portions supported by the coil supporting portion 52A and the coil supporting portion 56A (FIG. 4). And a light emitting portion 62A at a portion between the support portions 52A and 56A.

[0042] The upper part of Fig. 7 shows the first to third filament coils 62, 64, 66 attached to the inner lead wires 52, 54 and the support wires 56, 58 from the front of the reflecting mirror. FIG. 7 schematically shows a plan view seen in the optical axis direction, and the lower portion of FIG. 7 schematically shows the same front view. 7 is used for the purpose of explaining the positional relationship among the first to third filament coils 62, 64, 66, the illustration of the internal lead wires 52, 54 is omitted in FIG. The lines 56 and 58 are simply represented by lines for the purpose of showing the electrical connection between the filament coils. In the front view of the lower part, the first to third light emitting parts 62A, 64A, 66A of the first to third filament coils 62, 64, 66 are indicated by solid lines and the non-light emitting parts 62B, 64B, 66B are indicated by two-dot chain lines. Respectively. [0043] Fig. 7 [This shows [each filament = 3 inoles 62, 64, 66 (each light emitting lamp 64A, 66A), its axis CX is the optical axis R of the reflecting mirror 18 (Fig. 1) and They are arranged substantially parallel and substantially on the same plane P1. The second filament coil 64 (second light emitting portion 64) located between the first filament coil 62 (first light emitting portion 62) and the third filament coil 66 (third light emitting portion 66) has an axial center CX It is disposed so as to substantially overlap with the axis R.

 In addition, the end portions of the first light emitting portion 62Α and the third light emitting portion 66Α (62C, 66C, 62D, 66D) are substantially aligned in the direction of the optical axis R, and the second light emitting portion 64Α The end 64C (64D) is offset relative to the ends 62C (62D) and 66C (66D) of the first and third light emitting portions 62Α and 66Α in the optical axis R direction. The direction of the deviation is the direction in which the second light emitting unit 64A moves away from the opening force of the reflecting mirror 18 (FIG. 1) (the direction in which the first and third light emitting units 62A and 66A approach the opening).

 Thus, of the first to third light emitting parts 62A, 64A, 66A, the second light emitting part 64A located in the middle is the light axis R from the other first and third light emitting parts 62A, 66A. The relative shift in the direction is to prevent arcing between the light emitting parts during lighting so that the filament wire does not break. Before describing this, first, with reference to FIG. 35, the mechanism by which the arc discharge occurs will be described.

 [0046] FIG. 35 provisionally shows that the first to third filament coils 62, 64, 66 (first to third light emitting parts 62A, 64A, 66A) have axes CX parallel to each other and FIG. 10 is a view showing a filament body 202 in which parts are arranged substantially in alignment in the axial center CX direction, and is drawn in a format according to FIG. 7; The axial centers CX of the first to third filament coils 62, 64, 66 (first to third light emitting parts 62A, 64A, 66A) lie in the same plane P2. The filament body 202 is hereinafter referred to as a "comparative filament body 202", as compared to the embodiment of the present invention.

 In the halogen bulb having the comparison filament body 202, when power is supplied from the AC power source 204 to emit light, the first to third light emitting portions 62A, 64A, 66A of the comparison filament body 202 emit incandescent light. In this case, in order to improve the light collection efficiency in combination with the reflecting mirror, the coil spacing Dl, D2 between the first to third light emitting parts 62A, 64A, 66A is reduced to make the light emitting part as much as possible. Focus on the focus!

[0048] If the distance Dl, D2 is simply reduced and lighted while being forced Arc discharge occurs between the ends (62C-64C, 64D-66D) of the ends of the glass light emitting part that are not connected by the support wires 206 and 208 that are the conductors, which causes the filament wire to break. Resulting in. The potential difference of about 2Z3 of the voltage (rated voltage) applied to the comparison filament body 202 occurs between the above ends (between 62C and 64C, between 64D and 66D), and the electric field strength between the ends becomes the largest. It is.

 Therefore, in the present embodiment, the above-described arc discharge is suppressed while minimizing the decrease in the light collection efficiency by devising the relative arrangement among the plurality of filament coils (light emitting units). It was decided to prevent the disconnection caused by

 In the embodiment and modifications thereof described below, the arrangement of the filament coils (light emitting units) in the comparative filament body 202 shown in FIG. 35 (the relative posture between the filament coils (light emitting units)) is employed. In this case, the arrangement of each filament coil (light emitting portion) is set so that the distance between the ends on the side of the light source can be increased by connecting the conductors (support wires) more than in the case, To prevent the occurrence of

 Alternatively, in the embodiment and modifications thereof described below, each end of the comparative filament body 202 shown in FIG. The minimum distance that can be tolerated when the arrangement of the filament coils (light emitters) (the relative posture between the filament coils (light emitters)) is taken (that is, when the halogen bulb is lit and during lighting) And even if the distance is set equal to the minimum distance at which arcing does not occur, the adjacent light emitting portions can be brought closer to each other as a whole, and thus compared to the case where the comparison filament body 202 is used. To improve the collection efficiency.

Referring back to FIG. 7, in the filament body 60 according to the first embodiment, as described above, the second light emitting portion 64A in the middle among the first to third light emitting portions 62A, 64A, 66A The first and third light emitting portions 62A and 66A are relatively shifted in the optical axis R direction. In this way, it is possible to increase the distance between the end 62C and the end 64C that are not connected by the support wire 56 to the adjacent light emitting unit 62A and the light emitting unit 64A in series connection. Also, by connecting the adjacent light emitting portion 64A and the light emitting portion 66A with the support wire 58, the distance between the end portion 64D and the end portion 66D can be increased. Furthermore, according to the filament body 60 shown in FIG. 7, if the coil spacing Dl, D2 is the same as the comparative filament body 202 (FIG. 35), Since the distance is long (between 62C and 64C, between 64C and 66D), arcing is less likely to occur, and conversely, if the distance between the ends (between 62C and 64C, 64C and 66C) is the same, the coil The intervals D1 and D2 can be further reduced, which further improves the light collection efficiency.

(Modification 1)

 In the example shown in FIG. 7, the reflecting coil 18 (FIG. 1) is shown relative to the filament coil 64 (light emitting part 64A) in the middle with the filament coils 62 and 66 (light emitting parts 62A and 66A) on both sides. The force shifted in the direction away from the opening of the opening may be shifted in the approaching direction as in the case of the filament body 72 shown in FIG. The filament body 72 shown in FIG. 8 is basically the same as the filament body 60 shown in FIG. 7 except that the arrangement relationship of the filament coil is different, so the same components as those in FIG. The explanation is omitted.

 In addition, the inventors of the present invention have obtained a light distribution characteristic at an intermediate angle when the halogen bulb is formed using the filament body 60 or the filament body 72 and is incorporated in a narrow-angle reflecting mirror. Found out that Here, narrow angle refers to about 10 ° of beam divergence (beam angle), middle angle refers to about 20 °, and wide angle refers to about 30 °.

 FIG. 9 shows light distribution curves in the case where the narrow angle reflector and the filament body 60 or the filament body 72 are combined and in the case where the same narrow angle reflector and the comparison filament body 202 are combined.

 From FIG. 9, it can be seen that while the light distribution characteristics of the comparative filament body 202 have a narrow angle, the light of the filament body 60 (72) is combined with the narrow angle reflector. Regardless, it can be seen that the light distribution characteristic at the middle angle is clear.

 Therefore, if there is a narrow-angle reflector, the light distribution characteristics of the narrow angle and the distribution of the middle angle can be obtained by selectively using the halogen bulb using the comparison filament body 202 and the halogen bulb using the filament body 60 (72). Both light characteristics will be obtained.

 (Modification 2)

In the filament body 60 (FIG. 7) and the filament body 72 (FIG. 8), the filament coil 64 (light emitting portion 64A) in the middle is relative to the filament coils 62 and 66 (light emitting portions 62A and 66A) on both sides. The force shifted along the optical axis R of the reflecting mirror 18 (FIG. 1) It is also possible to shift all of the coil 62, 64, 66 (the light emitters 62A, 64A, 66A) along the optical axis R from each other. FIG. 10 is a view showing a filament body 73 configured as described above. The filament 73 shown in FIG. 10 is basically the same as the filament 60 shown in FIG. 7 except that the arrangement relationship of the filament coils is different. The explanation is omitted.

 Embodiment 2

 In the second embodiment, the first light emitting unit and the third light emitting unit are arranged such that their axial centers are substantially parallel, and the second light emitting unit is relative to the first and third light emitting units. They were inclined to distribute.

 FIG. 11 is a schematic view showing a filament body 74 of the second embodiment, and is drawn according to FIG.

 The axial centers of the first to third filament coils 62, 64, 66 (first to third light emitting portions 62A, 64A, 66A) constituting the filament body 74 are on the same plane P3. In the filament body 74, the first filament coil 62 (the first light emitting portion 62A) and the third filament coil 66 (the third light emitting portion 66A), and the axial center CX thereof is the optical axis R of the reflecting mirror 18 (FIG. 1). And the second filament coil 64 (the second light emitting portion 64A) is disposed such that its axial center CX is inclined with respect to the optical axis R.

 [0057] The direction in which the end is connected by the support wires 76 and 78 to the adjacent first and third light emitting units 62A and 66A by the direction of inclination is the first and third light emitting units 62A and 66A. (A direction in which the distance between the corresponding ends becomes narrow) so as to approach the connection end of the That is, the end 64C of the second light emitting part 64A and the end 66C of the third light emitting part 66A electrically connected thereto via the support wire 78 approach each other, and the second light emitting part 64A Of the first light emitting portion 62A, which is electrically connected to the end 64D of the first light emitting portion 62A via the support wire 76, is inclined in the direction in which the end 64D of the first light emitting portion 62A approaches.

In other words, an end portion of the second light emitting portion 64A not connected to the adjacent first and third light emitting portions 62A and 66A by the support wire is a corresponding end of the first and third light emitting portions 62A and 66A. Tilt in the direction away from the part (in the direction in which the distance between the corresponding ends becomes wider). That is, the end 62C and the end 64C move away from each other, and the end 66D and the end 64D move away from each other. It is.

 According to the filament body 74 which also has the above configuration, the distance D3 between the optical axis R and the axial center CX of the light emitting portion 62A, and the distance D4 between the optical axis R and the axial center CX of the light emitting portion 66A are comparative filament bodies 202. If it is the same as (Fig. 35), the distance between the ends (between 62C and 64C and between 64C and 66C) becomes longer, so arcing is less likely to occur, and conversely, between the ends (between 62C and 64C, 64D-66D) If the distance is the same, the distances D3 and D4 are further reduced by the amount of inclination (approximately equivalent to the displacement of the end 64C and the end 64D in the direction orthogonal to the optical axis R). As a result, the light collection efficiency will be further improved.

 (Modification)

 In the example shown in FIG. 11, the middle filament coil 64 (light emitting portion 64A) is inclined to the optical axis R, and the filament coils 62 and 66 (light emitting portions 62A and 66A) on both sides are substantially parallel to the optical axis R. Force In contrast to this, as shown in FIG. 12, the middle filament coil 64 (light emitting part 64 A) is disposed substantially parallel to the optical axis R, and the filament coils 62 and 66 on both sides (light emitting parts 62A and 66A) You may make it incline to the same direction in the same direction with respect to the optical axis R. Since the filament body 80 shown in FIG. 12 is basically the same as the filament body 74 shown in FIG. 11 except that the arrangement relationship of the filament coil is different, the same components are designated by the same reference numerals. The explanation is omitted.

 Embodiment 3

 FIG. 13 is a schematic view showing a filament body 82 of the third embodiment, which is drawn according to FIG.

 In the filament body 82, the second filament coil 64 (second light emitting portion 64A) is disposed such that the axial center CX thereof substantially overlaps the optical axis R of the reflecting mirror 18 (FIG. 1), and the first filament The coil 62 (first light emitting portion 62A) and the third filament coil 66 (third light emitting portion 66A) are disposed on both sides in the direction orthogonal to the optical axis R so as to sandwich the second filament coil 64 (second light emitting portion 64A). In the second embodiment, the axis CX is arranged to intersect with the axis of the second filament coil 64 (second light emitting portion 64A) substantially perpendicularly.

According to the filament body 82 having the above configuration, if the coil spacing D1, D2 is the same as the comparative filament body 202 (FIG. 35), the end portions (between 62C-64C, 64D-66D) are obtained. Distance) long distance Arcs are less likely to occur, and conversely, if the distance between the ends (between 62C and 64C and between 64D and 66D) is the same, the coil intervals Dl and D2 will be further reduced. Thus, the light collection efficiency will be further improved.

 When the halogen bulb using the comparison filament body 202 is combined with the narrow-angle reflection mirror, the beam spot has a substantially elliptical shape, while the halogen using the filament body 82 of the third embodiment. When a light bulb and a narrow-angle reflecting mirror were combined, it was necessary for the beam spot to be approximately circular.

 36 shows the light distribution when the halogen bulb using the comparison filament body 202 is combined with the narrow-angle reflecting mirror, FIG. 37 shows the light distribution curve, and the halogen bulb using the filament body 82 of the third embodiment. The light distribution distribution in the case where the reflection mirror and the narrow angle reflection mirror are combined is shown in FIG.

 Therefore, if there is a narrow-angle reflecting mirror, a halogen bulb using the comparative filament body 202 and a halogen bulb using the filament body 82 are used and divided into a substantially elliptical beam spot. The beam spot can also be made to be a substantially circular beam spot, and it becomes possible to change the beam shape according to the object to be irradiated economically.

 (Modification 1)

 In the filament body 82 (FIG. 13), the center filament coil 64 (light emitting portion 64A) is disposed parallel to the optical axis R, and the filament coils 62, 66 (light emitting portions 62A, 66A) on both sides are orthogonal to the optical axis R The relationship between the force filament coils 62, 64 and 66 with respect to the optical axis R may be reversed.

 [0065] FIG. 16 is a view showing a filament body 84 configured as described above.

 (Modification 2)

 In the filament body 82 (Fig. 13) and the filament body 84 (Fig. 16), the three filament cores 62, 64, 66 (light emitting rods 64A, 66A) are spaced in the direction orthogonal to the optical axis R. Not limited to this, the force may be spaced apart in the direction of the optical axis R.

[0066] FIG. 17 is a view showing a filament body 86 configured as described above. In FIG. 17, the left side shows a front view of the filament body 86, and the right side shows a right side view. Embodiment 4

 In the third embodiment, the axial center CX of the second filament coil 64 (light emitting portion 64A) and the axial center CX of the first and third filament coils 62, 66 (first and third light emitting portions 628 and 66A). In the filament body 90 according to the fourth embodiment, the plane intersection is performed.

[0067] FIG. 18 is a schematic view of the filament body 90 and is drawn according to FIG. 7. In the filament body 90, the first to third filament coils 62, 64, 66 The axial center CX of the third light emitting unit 62A, 64A, 66A) exists on the same plane P4.

 The second filament coil 64 (second light emitting unit 64A) in the middle is disposed such that its axial center CX substantially overlaps the optical axis R of the reflecting mirror 18 (FIG. 1), and The third filament coils 62 and 66 (first and third light emitting units 628 and 66A) are disposed such that their axial centers CX are substantially orthogonal to the optical axis R.

 According to the filament body 90 which also has the above-described configuration power, since the distance between the end portions of the ridges (between 62C and 64C and between 66D and 64D) can be increased by the support wire, the arc discharge can be performed. Is less likely to occur.

 (Modification)

 In the example shown in FIG. 18, the middle filament coil 64 (the light emitting portion 64A) is disposed parallel to the optical axis R (the axial center CX is superimposed on the optical axis R), but the invention is not limited thereto. The first and third filament coils 62 and 66 (the first and third light emitting units 628 and 66A) may be disposed such that their axial center CX is substantially parallel to the optical axis R. ,.

[0069] FIG. 19 is a schematic view showing a filament body 96 configured as described above. Since the filament body 96 shown in FIG. 19 is basically the same as the filament body 90 shown in FIG. 18 except that the arrangement relationship of the filament coil is different, the same components are indicated by the same reference numerals. The explanation is omitted.

When the halogen bulb using the comparison filament body 202 and the wide-angle reflecting mirror are combined, the beam spot becomes substantially circular, while the wide-angle type with the halogen bulb using the filament body 90 or 96 is used. When combined with a reflecting mirror, it was necessary that the beam spot be approximately elliptical. The light distribution distribution when the halogen bulb using the comparison filament body 202 is combined with the wide-angle reflecting mirror is shown in FIG. 38, the light distribution curve is shown in FIG. 39, and the filament body 90 of Embodiment 3 or The light distribution distribution when the halogen bulb using the filament body 96 is combined with the wide-angle reflection mirror is shown in FIG. 20, and the light distribution curve is shown in FIG.

 Therefore, if there is a wide-angle reflector, the beam spot can be made approximately circular by selectively using the halogen bulb using the comparison filament body 202 and the halogen bulb using the filament body 90 or 96. It can be an elliptical beam spot, and it is possible to change the beam shape economically according to the object to be irradiated.

 Fifth Preferred Embodiment

 In the halogen bulbs of the first to fourth embodiments, the filament body is configured of three filament coils. In the halogen bulb of the fifth embodiment, the filament body is configured of two filament coils.

 The halogen bulb of the fifth embodiment is basically the halogen bulb of the first to fourth embodiments, including a halogen substance sealed in the bulb, a rare gas and the like except that the configuration of the filament body is different. Since the configuration is the same, the following description will be focused on the different portions. Further, it goes without saying that the halogen bulb of the fifth embodiment can be mounted on the lighting fixture 12 (FIG. 1) of the first embodiment to constitute a lighting device.

 Filament body 300 in the fifth embodiment is shown in FIG. The upper portion of FIG. 22 schematically shows a plan view of the filament body 300 viewed in the direction of the optical axis of the reflecting mirror, and the lower portion of FIG. 22 shows the same front view. It is a schematic representation, and both are drawn according to FIG.

The filament body 300 has a first filament coil 302 and a second filament coil 304. Both filament coils 302 and 304 are produced in the same manner as in Embodiment 1 (FIG. 5). However, as the number of filament coils constituting the filament body decreases, the filament wire of one filament coil becomes longer, so the flatness ratio is increased and the filament wire per turn is lengthened, thus, the optical axis We are trying to shorten the direction. The flat ratio of the filament coils 302 and 304 is set to "4" as an example. In addition, as an example of the dimensions of the filament coil 302, 304, the width in the minor axis SX direction is about 0.35 mm, and the light emitting portion 30 The length in the axial direction of 2A, 304 is about 4.5111111.

 Each of the two filament coils 302 and 304 is disposed such that its axial center CX is substantially parallel to the optical axis of the reflecting mirror 18 (FIG. 1) and substantially on the same plane P5. In addition, the coil interval D5 is set to, for example, 2 mm.

 Then, based on the same idea as in Embodiment 1 (FIG. 7, FIG. 8 and FIG. 10), the second filament coil 304 (second light emitting portion 304A) is compared to the first filament coil 302 (first light emitting portion 302A). ) Is relatively shifted in the direction of the optical axis R. By doing so, it is possible to prevent the disconnection due to the arc discharge while minimizing the decrease in the light collection efficiency. The reason (mechanism) is the same as in the case of the first embodiment, and thus the description thereof is omitted.

 Further, in the filament body 300 according to the fifth embodiment, the first filament coil 302 (the first light emitting portion 302A) and the second filament coil 304 (the second light emitting portion 304A) are symmetrical with respect to the optical axis R. Not disposed, the distances D6 and D7 of the optical axes R of the filament coils 302 and 304 are different from each other. Specifically, for example, D6 is set to 0.5 mm, and D7 is set to 1.5 mm. The reason for arranging both filament coils 302 and 304 in this way will be described below.

 [0075] A halogen bulb (hereinafter referred to as "first bulb") having filament bodies (ie, D6 = D7 = 1 mm) arranged symmetrically with respect to the first filament coil 302 and the second filament coil 304 optical axis R When it was incorporated into a reflecting mirror and used as spotlight illumination, it became clear that the center of the spotlight on the illuminated surface would be dark and the periphery would be bright, with a so-called donut shaped spot shape. . That is, in the light distribution curve, it was found that bimodality in which the peak appears in two places appears. It was also found that this tendency is more pronounced as the beam divergence at the reflector becomes narrower. Such spot shapes may not be desirable as spot lighting to literally cause the object to spot up.

 Therefore, in the example shown in FIG. 22, as described above, the distances from the optical axis R of the two filament coils 302 and 304 (both light emitting portions 302A and 304A) are made different. Here, the halogen bulb according to the embodiment having the filament body 300 (D6 = 0.5 mm, D7 = 1.5 mm) shown in FIG. 22 is referred to as a “second light bulb”.

The first light bulb and the second light bulb each have a narrow beam angle (about 10 °). The lighting device was configured in combination with a reflector, and the light distribution characteristics (light distribution curve) on the irradiated surface separated by the lighting device power distance lm were investigated.

The investigation results are shown in FIG. In FIG. 23, those related to the first light bulb are indicated by alternate long and short dashed lines, and those related to the second light bulb are indicated by solid lines.

 Looking at the first bulb, it can be seen that the peaks of the light distribution curve appear bimodal in two places. That is, as described above, the central area is dark and the surrounding area is bright.

 On the other hand, in the second bulb, bimodality is eliminated and the peak of the light distribution curve is single. In other words, it is a spot light with good light distribution characteristics with almost symmetry centered on the brightest part. This is because the shape of the light distribution curve of the first light emitting portion 302A closer to the optical axis R by making the distance D6 of the first light emitting portion 302A from the optical axis R different from the distance D7 of the second light emitting portion 304A. It is considered that the influence on the above becomes more dominant than the influence on the shape of the light distribution curve of the second light emitting part 304A far from the optical axis R.

 (Modification 1)

 In the above-described example, the distance between the end 302D, 304D on the side not connected by the support wire 306 of both light emitting parts 302A, 304A is a distance where arcing does not occur between the ends, and both light emitting parts 302A. , 304A in a direction intersecting with the optical axis R, the two light emitting units 302A, 304A are relatively aligned with the optical axis while the two light emitting units 302A, 304A are disposed substantially parallel to the optical axis R. We decided to shift in the R direction.

[0079] In the case of a halogen bulb in which a filament assembly is formed by two filament coils while being forced, the arrangement of the two light emitting units for achieving the above purpose is not limited to this, and, for example, as shown below. You can also That is, it is assumed that both axial centers CX of both light emitting units 302A and 304A are parallel to the optical axis R (bulb central axis B), and one end and the other end of both light emitting units 302A and 304A It is also possible to incline the first light emitting portion 302A and the second light emitting portion 304A with respect to the optical axis R (bulb central axis B) from the virtual state aligned in the (valve central axis B) direction. The direction of inclination is such that the end 302C and the end 304C connected by the support wire approach each other, and the end 302D and the end 304D not connected by the support wire 306 move away from each other. In this case, as in the filament body 320 according to the modified example 1-1 shown in FIG. 24, the distance between the first light emitting unit 302A and the second light emitting unit 304A and the axial center CX (optical axis R (A distance in a direction orthogonal to that of the reflecting surface) can be inclined in a direction in which the reflecting surface 20A (FIG. 1) of the reflecting mirror 18 (FIG. 1) becomes narrower as it gets farther.

 Alternatively, as in the filament body 324 according to the modified example 1-2 shown in FIG. 25, the distance between the first light emitting unit 302A and the second light emitting unit 304A and the axial center CX (direction orthogonal to the optical axis R) The distance (d) of the reflecting surface 20A (FIG. 1) of the reflecting mirror 18 (FIG. 1) can be inclined to be wider as it gets farther.

 In the filament bodies 320 and 324 having the above-described configuration, the distance D8 between the end 302D and the end 304D not connected by the support wires 322 and 326 is determined during and during lighting of the halogen bulb. When they are separated to such an extent that arcing does not occur, the first light emitting portion 302A and the second light emitting portion 304A are inclined with respect to the optical axis R with respect to the end 302D and the end 304D, respectively. It will concentrate on the optical axis R. Therefore, temporarily, the distance between the end 302D and the end 304D is set to the same distance D8 as described above, and the first light emitting portion 302A and the second light emitting portion 304A are arranged substantially parallel to the optical axis R (virtual state The light collection efficiency is higher in the filament bodies 320 and 324 than in the case of).

 (Modification 2)

 In addition, the first filament coil 302 (the first light emitting unit 302A) and the second filament coil 304 (the second light emitting unit 304A) are disposed such that the axes CX are substantially orthogonal in the same plane. I don't care.

 A filament body 310 so configured is shown in FIG. The upper part of FIG. 26 schematically shows a front view of the filament body 310, and the lower part shows a schematic view of the lower surface.

In the filament body 310, the first filament coil 302 (the first light emitting portion 302A) preferably has a force such that the axial center CX thereof is substantially parallel to the optical axis R and is disposed at a position including the optical axis R. As shown in FIG. 26, the axial center CX is disposed at a position approximately overlapping the optical axis R.

The second filament coil 304 (the second light emitting portion 304A) is disposed in a posture in which the axial center CX is substantially orthogonal to the optical axis R, and the major axis LX (not shown) is substantially orthogonal to the optical axis R . In addition, the second The axial coil CX is substantially orthogonal to the optical axis R at a position substantially in the center of the second light emitting unit 304A in the axial center CX direction.

Thus, at least one of the light emitting units (in this example, the second light emitting unit 304A) has its axis C.

When a halogen bulb using a filament body in which X is disposed substantially orthogonal to the optical axis R is combined with a narrow-angle reflecting mirror, the beam spot has a substantially elliptical shape.

 The light distribution when the halogen bulb using the filament 310 is combined with a narrow angle reflection mirror is shown in FIG.

The beam spot when the halogen bulb using the filament body 300 (FIG. 22) and the reflection mirror are combined is substantially circular.

 Therefore, if there is a narrow-angle reflecting mirror, it is possible to make a beam spot having a substantially elliptical shape by using a halogen bulb using the filament 310 and a halogen bulb using the filament 300, and separating them. The beam spot can be a substantially circular beam spot, and it becomes possible to economically change the beam shape according to the object to be irradiated.

 Embodiment 6

 In the halogen bulb of the fifth embodiment, the filament body is constituted by two filament coils of which one ends are electrically connected by a support wire. Then, the filament body has two light emitting parts because a part of each of the filament coils emits light when the halogen bulb is energized.

 On the other hand, in the sixth embodiment, one filament coil is bent at substantially the center in the longitudinal direction (coil axis direction), and from the bent portion including the non-light emitting portion to one end of the filament coil. The first light emitting unit was configured to extend all the way, and the second light emitting unit was configured to extend to the other end. The halogen bulb according to the sixth embodiment is the same as the halogen bulbs according to the second to fifth embodiments, except that the filament body and its supporting structure are different, except that the halogen substance sealed in the bulb, the rare gas, etc. The configuration is basically the same as that of the halogen bulb according to Embodiment 1 (including each variation). Therefore, hereinafter, the description will be made focusing on the above different parts. Further, it goes without saying that the halogen bulb of the fifth embodiment can be mounted on the lighting apparatus 12 (FIG. 1) of the first embodiment to constitute a lighting device.

First Example FIG. 28 is a perspective view showing a schematic configuration of a filament body 502 and a supporting structure thereof according to a first example of the halogen bulb in the sixth embodiment.

 The filament body 502 is produced in the same manner as the filament coils 62, 64, 66 (FIG. 4, FIG. 6) (FIG. 5). One filament coil 504 is bent at its central portion and held in a bent state. It is That is, the filament coil 504 is also a single coil in which a filament wire is wound in a cylindrical shape of a flat cross section having a short axis and a long axis in the same manner as the filament coils 62, 64, 66. The filament coil 504 is bent in the short axis direction with the central portion as a base point (flexion center).

 One end portion of the filament coil 504 is supported by the coil support portion 506A of the inner lead wire 506, and the other end portion is supported by the coil support portion 508A of the inner lead wire 508. Reference numerals 512 and 514 denote stem glasses.

 And, a longitudinal central portion (bent portion) of the filament coil 504 is suspended and supported by a support wire 510 which is a support member. The filament coil 504 does not emit light at the portion supported by the coil support portions 506A and 508A (non-light emitting portion) is the same as in the case of the first to fifth embodiments. The internal lead wires 506 and 508 and the support wire 510 are made of tungsten.

 [0089] The upper part of FIG. 29 schematically shows a plan view of the filament coil 504 attached to the inner lead wires 506 and 508 and the support wire 510 as viewed from the optical axis R (FIG. 1) direction. FIG. 29 is a schematic view of the front view, and is drawn in the same manner as FIG. 7. In the drawing shown in the lower part of FIG. 29, the support wire 510 is represented by a cut end face cut at a portion where the filament coil 504 is directly suspended. In FIG. 29, the light emitting portion (504A1, 504A2) of the filament coil 504 is a solid line and the non-light emitting portion (504C) is a two-dot chain line in both the top plan view and the bottom plan view. Seven.

 [0090] The filament coil 504 is similarly bent in the same plane because of the bending relationship as described above. The filament coil 504 is disposed such that its coil axis is on substantially the same plane as the optical axis R (bulb center axis B).

In addition, in the bent portion of the filament coil 504, the conductive support wire 510 is used. Since the several turns (several turns) are electrically shorted, the light does not emit light even in the energized state. The range in which light is not emitted depends on the mode of the bent portion, the degree of bending (bending angle), the shape of the support wire, etc., but at least a part of the bent portion becomes a non-light emitting portion. That is, in the filament body 504, the first light emitting portion 504A1 exists between the bent portion including the non-light emitting portion and one end of the filament coil 504, and the second light emitting portion 504A2 exists between the other end. It becomes.

 In the filament body 502 also having the above configuration, the distance D9 between the non-light emitting portion 504B1 side end portion 504D1 of the first light emitting portion 504A1 and the non-light emitting portion 504B2 side end portion 504D2 of the second light emitting portion 504A2. Of the first light emitting portion 504A1 and the second light emitting portion with the end portion 504D1 and the end portion 504D2 as base points, respectively, when the halogen bulb is lighted and during lighting when the arc light is separated between the end portions. Since the light emitting region is concentrated on the optical axis R as a whole since the portion 504A2 is inclined with respect to the optical axis R, the light collection efficiency is improved as a modification of the fifth embodiment described above. This is the same as in the case of 1-1 (Fig. 24) and modification 1-2 (Fig. 25).

 Second Embodiment

 In the filament body 502 according to the first embodiment, as in the filament body 320 (FIG. 24) according to the modification 11 of the fifth embodiment, the optical axis R between the first light emitting portion 504A1 and the second light emitting portion 504A2 The distance in the direction orthogonal to the central axis B) is narrowed as it approaches the light irradiation opening side of the reflecting mirror 18 (in other words, it becomes wider as it gets farther from the light irradiation opening of the reflecting mirror 18). 29, the force causing the first light emitting portion 504A1 and the second light emitting portion 504A to have a “nodular” shape. Conversely, according to the modification 12 of the fifth embodiment. As with the filament body 324 (Fig. 25), it may be in the shape of a reverse "!"

A filament assembly 520 according to the second example of the sixth embodiment, configured as described above, is shown in FIG. FIG. 30 schematically shows a front view of the filament body 520, and is drawn in the same manner as the lower part of FIG. The filament 520 (FIG. 30) has the same configuration as the filament 502 (FIG. 28) except that the opening directions of the first light emitting unit 504A1 and the second light emitting unit 504A2 are different. Accordingly, in the filament body 520 shown in FIG. 30, constituent parts substantially the same as the filament body 502 are denoted by the same reference numerals, and the description thereof will be omitted. The The support wire 522 for supporting the filament body 520 and the internal lead wire (not shown) can be realized by appropriately bending a tandasten wire.

 Third Embodiment

 FIG. 31 is a perspective view showing a schematic configuration of a filament body 400 according to a third example of the halogen bulb in Embodiment 6 and a supporting structure thereof.

 Filament body 400 is manufactured in the same manner as filament coils 62, 64, 66 (FIG. 4) (FIG. 5). One filament coil 402 is bent at its central portion and held in a bent state It is. That is, in the filament coil 402 as well as in the filament coils 62, 64, 66, the filament wire is wound in a flat cross-section tube having a short axis SX and a long axis LX (FIG. 6). Is a coil of In FIG. 31, for the sake of convenience, the entire shape of the filament coil 402 is roughly regarded as a tubular body having a flat cross section, and the filament coil 402 is represented by the outer shape of the tubular body.

 A longitudinal central portion (a bending portion 402C) of the filament coil 402 is suspended and supported by a support wire 412 which is a force supporting member. The one end portion of the filament coil 402 is supported by the coil support portion 404A of the inner lead wire 404, and the other end portion is supported by the coil support portion 406A of the inner lead wire 406. The support wire 412 and the internal lead wires 404 and 406 are made of tungsten as an example. Also, reference numerals 408 and 410 denote stem glass.

The filament coil 402 does not emit light at portions supported by the coil support portions 404A and 406A (non-light emitting portions 402B1 and 402B2), which are the same as the embodiments described above. In addition, several turns (several turns), which are supported by conductive support wires 412 at the bends of the filament coil 402, do not emit light even in the energized state because they become electrically shorted. The same is true for the first embodiment (FIGS. 28 and 29) and the second embodiment (FIG. 30). That is, even in the filament body 402, the first light emitting portion 402A1 exists between one end of the bent portion 402C including the non-light emitting portion and one end of the filament coil 402, and the second light emitting portion 402A2 exists between the other end. It will be. Furthermore, it can be said that the first light emitting part 402A1 and the second light emitting part 402A2 are electrically connected to each other at the support wire 412 which is a force conductor between the one end parts of the first light emitting part 402A2 and the filament wire part which becomes the non light emitting part. The filament body 402 has an optical axis R (not (Shown) is disposed to pass through the bending portion 402C.

 [0097] And, the filament coil 402 has (a) a long axis LX at the longitudinal central portion (the bending portion 402C).

 (Hereinafter referred to as “central long axis LXc”) and the long axis LX (hereinafter referred to as “first end”) of the end closer to the coil support portion 404A of the first light emitting portion 402A1 (hereinafter referred to as “first end”) Long axis LX (hereinafter referred to as “first end long axis LXbl”) and an end (hereinafter referred to as “second end”) of the second light emitting section 402A2 on the side closer to the coil support section 406A The second end portion long axis LXb2 ”) is substantially on the same plane, and (b) viewed in a direction (direction of arrow A) orthogonal to the central long axis LXcl The central portion in the longitudinal direction is bent as a base point (center) so as to be in a letter shape.

 When the distance between the first end and the second end of the filament 400 having the above-described configuration is separated to the extent that arc discharge does not occur during and during lighting of the halogen bulb, the first end is separated. The light emitting area is concentrated on the optical axis R as a whole by the inclination with respect to the first light emitting part 402A1 and the second light emitting part 402A2 and the force optical axis R with the part and the second end as a base point As a result, the reason that the light collection efficiency is high is the same as in the case of the modification 1 1 (FIG. 24) and the modification 1-2 (FIG. 25) of the fifth embodiment.

Fourth Embodiment

 FIG. 32 is a perspective view showing a schematic configuration of a filament body 420 and a supporting structure thereof according to a fourth example of the halogen bulb in the sixth embodiment, and is drawn in the same manner as FIG.

 The filament body 420 is basically the same as the filament body 400 (FIG. 31) of the third embodiment except that the bending mode (a) of the filament coil and (a) in (b) are different. It is a configuration. Therefore, in FIG. 32, the structural members substantially the same as the filament body 400 and its supporting structure (FIG. 31) will be assigned the same reference numerals and the detailed description thereof will be omitted. I will explain the part.

The filament coil 402 constituting the filament body 420 includes (c) the long axis LX (central long axis LXc) at the longitudinal central portion (the bending portion 402C) and the coil support portion 404A of the first light emitting portion 402A1. At the near end (first end) the long axis LX (first end long axis LXbl) and at the end near the coil support 406A of the second light emitting section 402A2 (second end) The direction in which the major axis LX (second end major axis L Xb2) is orthogonal (crossover) and (b) orthogonal to the central major axis LXc (the direction of arrow A ), It is bent with the longitudinal central portion as a base point (center) so as to form an inverted “V” shape as a whole.

 In the first to fourth embodiments, the support wire 510 (FIG. 28, FIG. 29), the support wire 522 (FIG. 30), and the support wire 412 (FIG. 31, FIG. 32) are embodiments. Unlike the case of the first to fifth embodiments, the function of electrically connecting the filament coils is not limited as long as the required filament coil can be mechanically supported. Therefore, it is formed of an insulating member such as a ceramic material or a glass material. It is also possible. Even in this case, the coil pitch becomes narrower as the adjacent windings (turns) contact with each other on the inner side of the bent portion of the filament coil 50 4 or 402, so that the coil pitch becomes narrow and the portion to be in contact Causes a short circuit. As a result, the short circuit portion does not emit light and a non-emission portion is formed. In this case, in the first embodiment (FIGS. 28 and 29) and the second embodiment (FIG. 30), one end portions of the first light emitting portion 504A1 and the second light emitting portion 504A2 are the third embodiment. In FIG. 31 and the fourth embodiment (FIG. 32), one end portions of the first light emitting portion 402A1 and the second light emitting portion 402A2 are electrically connected to each other by a filament wire portion to be a non-light emitting portion. It can be said that it is connected.

 Embodiment 7

 FIG. 33 is a longitudinal cross-sectional view showing a schematic configuration of a reflecting-mirror-equipped halogen lamp 100 according to the seventh embodiment.

 [0102] The halogen bulb 100 with a reflector is a reflector-integrated type halogen bulb. The halogen bulb 102 used in this is mainly the halogen bulb 14 according to Embodiment 1 except for the base. Since the configuration is basically the same as 2), the same reference numerals are given to the common parts and the description thereof is omitted. The filament body is not limited to that of the first embodiment, but may be of the second to sixth embodiments.

 The reflecting mirror 104 is also made of hard glass or quartz glass and has a funnel-shaped substrate 106. A multilayer interference film 108 which constitutes a reflection surface is formed on the concave portion 106A formed on the base 106 with a spheroidal surface or a paraboloid of revolution. The multilayer interference film 108 may be a metal film such as aluminum or chromium, silicon dioxide)), titanium dioxide (Ti

 2

 O 2), magnesium fluoride (MgF), zinc sulfate (ZnS) or the like. Reflection

2

The aperture diameter (mirror diameter) of the mirror 104 is 100 mm. In addition, if necessary, the reflective surface You may also

 The reflecting mirror 104 has a front glass 110 provided at the opening of the base 106. The front glass 110 is locked to the base 106 by known fasteners 112. In place of the stoppers 112, an adhesive may be used to fix them. Alternatively, both may be used in combination. Of course, the front glass can be one of the essential components of halogen lamps with reflectors.

 The neck portion 106 B of the base 106 is fitted with a base receiving portion 122 provided on the opposite side to the terminal portions 116 and 118 of the base 114 of the halogen lamp 102, and is fixed with an adhesive 124. .

 The valve 26 is attached to the base 114 prior to the attachment of the base 106 to the base 114.

 As described above, the present invention has been described based on the embodiment. The present invention is, of course, not limited to the above-described embodiment, and may be, for example, the following embodiment.

 (1) The filament coil is not limited to the track shape described above, and may have other flat shapes. The point is that it may be wound in a tubular shape having a flat cross section having a major axis and a minor axis orthogonal to each other. In addition, the aspect ratio is not limited to an integer, and can take an arbitrary fraction.

 Here, in the present invention, "a flat cross section having a short axis and a long axis" includes those having the following shapes. The shape will be described with reference to FIG. In FIG. 34, the minor axis is denoted by “SX”, the major axis is denoted by “LX”, and the minor axis and the major axis are both substantially orthogonal to the central axis (ie, coil axis). "CX" is attached respectively.

 (I) As shown in the same figure (a), looking at the coil axial center CX direction force, the track shape described above, that is, two parallel line segments and their respective ends in a substantially semicircle It was tied.

 (ii) As shown in (b) of the figure, the one having a shape in which the circular shape is crushed when viewed from the direction of the coil axis CX.

 (iii) As shown in (c) of the figure, the coil axial center CX direction force is also viewed to have a substantially elliptical shape

(iv) As shown in (d) of the figure, the coil axial center CX direction force is substantially rectangular. However, the four corners are rounded on processing.

(V) Others, having a shape similar to the above (i) to (iv) when viewed from the coil axis CX direction. Example For example, in (i) above, as shown in (e) of the same figure, even if two parallel line segments are curved in the inward direction, they are included as shapes similar to the above (i). Moreover, the deformed shape of said (i)-(iv) by process variation is also included here.

 (2) Further, in the present invention, the force of the light emitting portion of the filament body in the form of a single layer coil wound in a flat cylindrical shape is not limited thereto, and the present invention is not limited to this. It does not matter if you The point is that as long as the coil axis is substantially linear, the cross-sectional shape is arbitrary.

 (3) In the first embodiment, the lighting apparatus is configured by the lighting apparatus including the reflecting mirror and the halogen bulb, but the invention is not limited thereto, and the lighting apparatus includes the lighting apparatus without the reflecting mirror and the halogen bulb with the reflecting mirror. It does not matter as it constitutes. Specifically, for example, a halogen lamp 100 with a reflector shown in FIG. 33 may be attached instead of the reflector 18 and the halogen lamp 14 in the illuminator shown in FIG. Absent.

 (4) In the above-described embodiment, the force showing a halogen bulb as an example of the bulb The present invention is also applicable to a bulb other than a halogen bulb. The point is that any light source may be used as long as it emits white heat by passing an electric current through the filament body.

Industrial applicability

 The tube according to the present invention can be suitably used, for example, as a tube incorporated and used in a reflecting mirror.

Claims

The scope of the claims

 [1] A tube incorporated and used in a reflecting mirror having a concave reflecting surface, comprising: a hermetically sealed valve;

 A filament body having a configuration in which a plurality of single-layered coil-shaped light emitting units provided in the bulb and wound in a cylindrical shape are electrically connected in series via a conductor;

 In any of the two adjacent light emitting units in the series connection, it is assumed that the axes of the two light emitting units are parallel and that one end and the other end of the two light emitting units are aligned. A tube characterized in that the two light emitting parts are arranged in a posture in which the distance between the end parts not connected by the conductor is longer than the state.

 [2] The filament body is one in which first, second and third light emitting parts are electrically connected in series in this order,

 Each light emitting portion has an axial center substantially parallel to the optical axis of the reflecting mirror, and on substantially the same plane, and a second light emitting portion between the first light emitting portion and the third light emitting portion. The department is arranged so that

 The end portions of the first light emitting portion and the third light emitting portion are substantially aligned in the optical axis direction, and the end portions of the second light emitting portion are at the end portions of the first and third light emitting portions. The tube according to claim 1, wherein the tube is relatively offset in the direction of the optical axis.

[3] The filament body is one in which first, second and third light emitting parts are electrically connected in series in this order,

 Each light emitting portion is disposed such that its axial center is on substantially the same plane, and a second light emitting portion is present between the first light emitting portion and the third light emitting portion.

 The first light emitting unit and the third light emitting unit are substantially parallel, and the second light emitting unit is disposed to be inclined relative to the first and second light emitting units. The tube according to claim 1.

 [4] The filament body is one in which first, second and third light emitting parts are electrically connected in series in this order,

The second light emitting unit is disposed such that its axial center substantially overlaps with the optical axis of the reflecting mirror, The first light emitting portion and the third light emitting portion are divided on both sides in a direction orthogonal to the optical axis so as to sandwich the second light emitting portion, and the respective axial centers are substantially perpendicular to the axial center of the second light emitting portion The bulb according to claim 1, wherein the bulb is disposed so as to be sterically crossed.

[5] The filament body is one in which first, second and third light emitting parts are electrically connected in series in this order,

 Each light emitting portion is disposed such that its axial center is on substantially the same plane, and a second light emitting portion is present between the first light emitting portion and the third light emitting portion.

 The tube according to claim 1, wherein the second light emitting portion is disposed such that its axis is substantially orthogonal to both axes of the first and second light emitting portions.

[6] The filament body is configured by bending a filament coil in which a filament wire is flatly and single-rolled at a substantially central portion in the longitudinal direction,

 The tube according to claim 1, wherein the first light emitting portion exists between the bending portion force and one end of the filament coil and the second light emitting portion extends between the other end.

[7] With a reflector,

 The reflecting tube according to any one of claims 1 to 6, wherein the reflecting tube is incorporated in the reflecting mirror.

[8] A luminaire having a reflecting mirror,

 The lighting device according to any one of claims 1 to 6, which is incorporated in the reflecting mirror.

[9] Lighting equipment,

 8. A reflector-equipped tube according to claim 7, which is attached to the luminaire.