JPH0955192A - Light bulb, light bulb with reflector and lighting system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce variations in the setting positions of a filament and thus to obtain uniform light distribution characteristic by inserting the tip of an internal lead wire for supporting the filament into a thin pipe and by supporting the other end of the filament with a support wire. SOLUTION: A halogen light bulb L of 100V 100W with a metal fitting on one side has a silica glass bulb 1, a squeezed sealing part 2 comprising a flat pinched part and a pinched surface. The sealing part 2 has Mo foils 4, 4, support wires 5S, 5L, a double-coil filament 6. The double-coil filament 6 comprises a luminous part 61 of several turns of double-coil formed in the center, straight- uncoiled part 62S, 62L, and outermost leg parts 63S, 63L of single-coil shape connected to the straight parts. The tip 51S of the support wire 5S is inserted into and fixed at leg part 63S of single-coil shape of one end of the filament 6 and the long support 52L is inserted into and fixed at the other leg part 63L of single-coil shape. The part 52 bent nearly at right angle is formed in the middle of the support wire 5L to prevent the leg part 63L of single-coil shape from coming therefrom.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light bulb such as a halogen light bulb and a lighting device in which a filament coil can be easily arranged on the central axis of a glass bulb.

[0002]

2. Description of the Related Art Various measures have been taken in the field of bulbs as a part of energy saving, and for example, in a halogen bulb, a multilayer light interference film having a visible light transmitting and infrared reflecting action is formed on the surface of a glass bulb. Is being done. The bulb transmits visible light emitted from the filament through the bulb, and infrared rays are reflected by the light interference film to be returned to the filament, which heats the filament to increase the luminous efficiency. I try to reduce the infrared rays.

As such a light interference film having a visible light transmitting and infrared reflecting effect, a titanium oxide (TiO ₂ ) film having a high refractive index and a silicon oxide (SiO ₂ ) film having a low refractive index are used. A layered structure in which layers are alternately laminated is used, and by appropriately selecting the number of layers and the thickness of layers, light interference is used to selectively transmit and reflect light in a desired wavelength range. is there. In this light bulb, the larger the number of layers of the film, the higher the reflectance of infrared rays and the greater the effect of power saving.

The shape of the glass bulb of this halogen bulb is an elliptical shape such as a cylindrical shape, a spherical shape or a spheroidal shape, and the filament is made of a tungsten thin wire in order to obtain a predetermined light emission characteristic and electric characteristic. The coil is wound in a coil shape, and the filament coil is arranged along the central axis of the valve in the case of a cylindrical valve, and is arranged at a position passing through the focus in the case of a spherical shape or an oval shape.

In the case of a cylindrical valve, a coiled filament is arranged along the central axis of the valve, and the extending filament and the valve wall face each other at the same interval. That is, there is a filament axis in the center in the transverse direction of the bulb having a cylindrical shape, and the infrared rays emitted from the filament at the center of the cylinder when the bulb is lit are reflected by the visible light transmitting infrared reflecting film on the bulb surface to the original position of the filament. It returns and heats the filament.

In the case of a spherical bulb or a spheroidal bulb, the filament is disposed through the focal point on the central axis of the bulb, and the infrared rays emitted from the filament located at the focal point when the bulb is lit are on the bulb surface. It is reflected by the visible light transmitting infrared reflecting film and is returned to the filament position of the focal portion to heat the filament portion at the focal point. In addition, infrared rays emitted from the out-of-focus filament portion do not return to the original position of the filament even when reflected by the visible light transmitting infrared reflecting film on the bulb surface, and enter the infrared reflecting film on the opposite surface of the bulb. In the bulb, the infrared energy is largely attenuated and returns to the filament to heat the filament. There is. The returned infrared ray is not always the infrared ray emitting portion of the filament coil.

When any of these cylindrical, spherical or spheroidal bulbs is used, the infrared rays emitted from the filament portion are returned to the filament even if they are reflected by the visible light transmitting infrared reflecting film on the bulb surface. Have to,
The filament cannot be heated and the emission characteristics cannot be improved. That is, if the position where the filament is arranged in the bulb deviates from the central axis of the bulb, the infrared rays return poorly, and the larger the deviation, the lower the feedback ratio and the improvement in the light emission characteristics cannot be expected.

By the way, regardless of whether or not the visible light transmitting / infrared reflecting film is formed, a light bulb assembled or attached to a separately formed reflecting mirror is used for light distribution depending on the arrangement position of the filament coil in the reflecting mirror. It is known that the characteristics change greatly. Therefore, in the case of a light bulb with a strict characteristic tolerance range, when fixing the light bulb in the reflecting mirror, fix the light bulb while performing focusing called focusing work, or fix the light bulb to the base end joined to the bulb end. I performed the same focusing operation as above and attached a flange plate for position adjustment to this mouthpiece.

However, it takes time and effort to deal with the above, and structurally uniquely, if the filament coil is on the central axis of the valve, the work can be carried out with reference to the valve, so that the work is easy. You can do it. Therefore, in this type of one-end-sealed halogen bulb, for example, Japanese Utility Model Publication No. 56-81468 and Japanese Utility Model Publication No. 59-12115.
As shown in Japanese Patent Publication No. 5 etc., the longer one of the two long and short support wires (lead wires) extending from the sealing portion and supporting the filament by wire connection is referred to as the sealing portion. It is adapted to be inserted and supported in an exhaust pipe provided at the other end located on the opposite side. This is because when a light bulb is mounted in a reflector such as an instrument and used, if the compatibility with the inner surface of the reflector is poor, that is, if the filament is displaced from the bulb axis, the prescribed light distribution characteristics cannot be obtained. This is done to reinforce the support wire and filament so that they will not be deformed when vibration or shock is applied to the light bulb.

As described above, by locking the support wire, the displacement of the filament can be suppressed, but
With a support wire that is simply inserted into the exhaust pipe and has a smaller diameter than the inner diameter of the pipe, there is still variation in the position of the support line between individual light bulbs, and there is also the possibility that the support wire may move within the exhaust pipe due to vibration, etc. The filament coil was not located at the predetermined position in the reflector, which sometimes led to deterioration of the light distribution characteristics. The positions of the filaments connected to the wires also vary, and thus the infrared feedback rate also varies, and the uniformity of the light emission characteristics deteriorates.

Therefore, it is also known that the vicinity of the tip of the support wire is wound into a coil having a diameter substantially the same as the inner diameter of the exhaust pipe or is bent into a U shape to be elastically locked to the inner wall of the exhaust pipe. However, these configurations are still insufficient because the support wires bend when subjected to vibration or shock.

Further, it is not sufficient to suppress the displacement of the filament only by inserting and locking the support wire in this way, and a structure for fixing the support wire in the exhaust pipe is also known, for example, from Japanese Utility Model Publication No. 63-10607. There is.

[0013]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
The one described in Japanese Patent No. 607 is disclosed by melting a long support wire having its front end side inserted into an exhaust pipe provided at the other end located on the side opposite to the sealing part by melting the exhaust pipe. It is embedded and fixed in the exhaust pipe.
With such a configuration, one end of the long support wire is fixed to the sealing portion (or the hide glass) and the other end is fixed to the exhaust pipe, so that the long support wire can strongly withstand vibration and impact.

However, if the exhaust pipe is simply melted by heating and embedded in the glass gob, the glass that has been softened and melted undesirably flows when heating the exhaust pipe portion and is undesirably applied to the support wire (lead wire). Such stress may be applied or the position thereof may be moved, and the movement of the support line has also been a cause of displacement of the filament. As a result of the variation in the filament position, the combination with the reflecting mirror is poor as described above, and the light distribution characteristics are deteriorated. However, there is a problem in that the uniformity of light emission characteristics is deteriorated. The present invention has been made to address this problem, and in a light bulb combined with a reflecting mirror or a light bulb having a visible light transmitting / infrared reflecting film formed thereon, there is little variation in the fixing position of the support line, and thus the placement position of the filament. It is an object of the present invention to provide a light bulb having substantially uniform light emission and light distribution characteristics and a lighting device equipped with this light bulb, by reducing the variation of

[0015]

A light bulb according to claim 1 of the present invention comprises a glass bulb having a sealing portion at one end and a capillary pinch portion at the other end, and a glass bulb along a central axis of the bulb. A coiled filament provided, one end side support extending from the sealing portion and supporting one end of the filament near the sealing portion, and the filament sealing extending from the sealing portion The other end on the side farther from the portion is supported, and the other end is supported by burying the other end in the glass of the thin tube pinch portion to support the other end of the filament.

In this way, the long internal lead wire inserted into the thin tube portion such as the exhaust pipe on the side opposite to the sealing portion of the valve is pinched by melting the thin tube portion and forcibly pressing it with the pincher die. Since it is embedded inside and supported and fixed, the pincher for opening and closing opens and closes at the same position as long as the pressing pincher mold position does not shift, so that the internal lead wires inside the sealed parts of each valve are almost the same part. Can be installed at That is, the filaments connected to the long internal lead wires of the individual light bulbs can be arranged along the central axis of the bulb at a predetermined position.

The thin tube referred to in the present invention may be an exhaust tube provided at the end of the valve, a thin tube provided separately, or formed by reducing a part of the valve. In the present invention, both the exhaust pipe and the thin pipe are called thin pipe in the present invention.

A light bulb according to claim 2 of the present invention is
At least one of the one end side support and the other end side support doubles as an internal lead member.

That is, the support in the present invention is a general term for an internal lead wire extending from the sealing portion into the valve or a lead wire further connected to this lead wire.

The light bulb according to claim 3 of the present invention is
At the tip of the other end side support extending from the sealing portion, the other end of the filament is supported at one end, and the inner lead member embedded in the glass of the capillary tube pinch portion is connected to the other end. It has a feature.

That is, the support does not directly support the filament, but a lead wire separately supporting the filament is connected to the support, and when the support coil diameter of the filament and the support diameter are significantly different, the support coil The supporting portion of the filament can be inserted into and supported by a lead wire having a diameter.

The light bulb according to claim 4 of the present invention is
The valve is characterized in that it partially includes a cylindrical, spherical, or spheroidal portion.

When a visible light transmitting / reflecting film is formed on the wall surface of the bulb having these shapes, infrared rays emitted from the filament are reflected by the infrared reflecting film and returned to the filament. The center of the filament is aligned with the valve center axis. If this is not done, the infrared feedback rate will drop significantly.

However, according to the present invention, since the coincidence rate of the central axes of the filament and the bulb is increased, it is possible to provide a bulb with a visible light transmitting infrared reflecting film having a high feedback rate.

The light bulb according to claim 5 of the present invention is
The other end side support is characterized in that it is bent into a U-shape having a surface substantially parallel to the pinch surface in the thin tube pinch portion.

When the tip of the support is bent into a U shape and extends into the exhaust pipe portion, the pinch portion is formed by pressing from both sides parallel to the U-shaped surface of the support. Since the U-shaped portion is not superposed, the support wire can be fixed at a predetermined position without being deformed by applying a small pressure, and the displacement of the filament coil position can be prevented as much as possible.

The light bulb according to claim 6 of the present invention is
It is characterized in that a visible light transmitting infrared reflecting film is formed on the surface of the bulb.

In this light bulb, the infrared rays emitted from the filament are reflected by the infrared reflection film and returned to the filament, but if the center of the filament does not coincide with the central axis of the bulb, the infrared ray return rate is remarkably reduced.

However, according to the present invention, since the coincidence rate of the central axes of the filament and the bulb is increased, it is possible to provide a light bulb with a visible light transmitting infrared reflecting film having a high feedback rate.

A light bulb according to claim 7 of the present invention is
It is characterized in that the visible light transmitting infrared reflecting film is a multilayer optical interference film formed by alternately stacking high refractive index layers and low refractive index layers.

The laminated optical interference film can efficiently transmit and reflect light of a predetermined wavelength.

The light bulb with a reflecting mirror according to claim 8 of the present invention is any one of the above-mentioned claim 1 to claim 7, wherein the reflecting mirror and the housing hole formed on the back surface of the reflecting mirror are arranged. It is characterized in that it is provided with the light bulb described in one.

The light bulb according to any one of claims 1 to 7 is a high efficiency mirror having a filament disposed on the central axis of the bulb, which achieves high visible light transmission and infrared reflection, and is a reflecting mirror. It shows higher luminous efficiency when it is used in combination with. Further, when a dichroic film or the like is formed on the reflecting mirror, the infrared rays transmitted through the bulb can be radiated to the rear surface side of the reflecting mirror instead of being radiated to the front surface of the reflecting mirror.

Further, an illumination device according to claim 9 of the present invention comprises an appliance or a lamp body, and the light bulb according to any one of claims 1 to 8 mounted on the appliance or the lamp body. It is characterized by having.

In this case as well, the same effect as described in claim 8 can be obtained, and the invention can be applied to various lighting fixtures and lighting equipment.

[0036]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show an embodiment of a light bulb,
For example, the rating for floodlighting of exhibited products is 100V1
A partial cross-sectional front view of a halogen bulb L of a single-ended type of 00W,
2A and 2B are a side sectional view and a lateral sectional view of the main part of FIG.

In the figure, reference numeral 1 indicates an outer diameter of about 11 made of quartz glass.
mm cylindrical valve, 2 is a crush seal part formed at one end of the valve 1, and 3 is a flat pinch part that is melted and pressed by an exhaust pipe part provided at the other end of the valve 1 to close it. Three
1 and a pinch surface 33, the valve 1 has an airtight structure that is isolated from the outside air.

Further, 4 and 4 are metal foils made of molybdenum foil or the like which are hermetically sealed in the sealing portion 2, 5S and 5L.
Is a pair of long and short support wires made of molybdenum wire or tungsten wire connected to one end of the metal foils 4, 4.
Is a double-coil-shaped filament formed by winding a tungsten wire, which is arranged along the central axis of the valve 1 and whose end portion is connected to and supported by the support wires 5S and 5L (the coil-shaped portion in the middle portion is It is omitted.).

Reference numeral 7 denotes an optical interference film formed on at least one of the inner and outer surfaces of the bulb 1, for example, an outer surface, which transmits visible light and reflects infrared light, and 5A is a filament formed of molybdenum wire or the like. An anchor 5B that supports the middle portion of 6 is a bead made of quartz or hard glass that electrically insulates the anchor 5A and the pair of support wires 5S and 5L from each other and integrally supports and fixes them.
Reference numeral 8 denotes a base joined to cover the sealing portion 2 at the end of the valve 1. The base 8 is connected to the other ends of the metal foils 4 and 4 to extend an external lead wire (not shown). No.) is connected. Further, in the valve 1, bromine (Br),
At least one halogen such as chlorine (Cl), iodine (I) or fluorine (F), and an inert gas such as argon (Ar) are enclosed.

Further, the filament 6 has a light-emitting portion 61 of a double coil shape with a few turns in the center, a substantially linear skip winding portion 62S, 62L connected to the light-emitting portion 61, and the skip winding portion 62S. , 62L are formed in the outermost portion connected to the 62L, 62L. Then, the tip portion 51S of the short support wire 5S is provided on one of the single coil-shaped leg portions 63S at the end portion of the double coil-shaped filament 6, and the other single coil-shaped leg portion 63 is provided.
The long support wire 5L is inserted into and fixed to L. (Note that this fixing is made by fitting or by welding or caulking.) By forming a bent portion 52L at a substantially right angle in the middle of the long support wire 5L, the single coil-shaped leg portion 63L is formed. It is structured so as not to get out.

The end 51L of the long support wire 5L bent into a U-shape 53L extends into the exhaust pipe 3 and is melted and pressed in the glass of the pinch portion 31. Is buried in. The pinch portion 31 is formed by pressing (viewing from the arrow) from both sides parallel to the surface of the support wire 5L bent into the U-shape 53L.
In this case, since the U-shaped portion is not overlapped, only a small pressure is applied to the support wire 53L and the support wire 53L can be fixed at a predetermined position without being deformed, and the displacement of the filament coil 6 position can be prevented as much as possible. The pinch portion 31 may be formed by pinching off the exhaust pipe portion 3 after chipping it off, or at the same time as tipping off the exhaust pipe portion 3.

The light interference film 7 which transmits visible light and reflects infrared rays has, for example, a high refractive index layer H containing titanium oxide (TiO ₂ ) as a main component and silicon oxide (SiO ₂ ) as a main component. The low refractive index layers L described above are alternately laminated.

In this embodiment, in order to form the above-mentioned high refractive index layer, a reaction vessel (not shown) was charged with titanium (Ti) alkoxide, ethanol was added and mixed uniformly, and then stirred at room temperature. An acylating agent or a chelating agent was added, and the mixture was heated and refluxed, and then held for 1 hour to carry out the reaction. A glassy forming agent and ethanol were added to the obtained reaction liquid to prepare a composite oxide thin film-forming composition coating liquid having a concentration of 4.5% by weight calculated as the composite oxide.

Next, the coating liquid is applied to the valve 1 in a uniform thickness.

The coating solution may contain a glass-forming agent such as an organic solvent-soluble inorganic or organic phosphorus compound or boron compound. Further, these glass-forming agents are added in an amount of 10% by weight or less, preferably 0.1 to 5.0% by weight, based on the total amount of the composite metal oxide converted on the oxide basis.

That is, the valve 1 was dipped in the coating solution, and then the valve 1 was pulled up at a constant speed and baked in the atmosphere at 400 to 900 ° C. for 10 minutes to form titanium oxide ( TiO ₂ ) film is formed.

Then, in order to form the above low refractive index layer, an organic silicon compound such as tetramethoxysilane, tetraethoxysilane, tetraisopropoxysilane, tetrabutoxysilane, diethoxydiisopropochitosilane,
A solution containing a silane alkoxide such as dichlorodimethoxysilane and / or a hydrolytic condensate thereof is prepared. The valve 1 in which the high refractive index layer made of the titanium oxide (TiO ₂ ) film was formed was dipped in this solution, and then pulled up at a constant speed, and the temperature was 400 to 900 ° C. in the atmosphere as described above.
By baking for 10 minutes, a silicon oxide (SiO ₂ ) film forming the low refractive index layer is formed.

The step of alternately forming the high refractive index layers H ... And the low refractive index layers L ... Is repeated a plurality of times to form a predetermined number of layers, for example, 41 layers. The multilayer optical interference film 7 thus formed has high visible light transmittance and infrared reflectance, has high heat resistance, and is free from clouding and peeling from the bulb 1 surface.

In this light bulb L, the long support wire 5L for connecting and supporting the double-coil-shaped filament 6 is inserted into the exhaust pipe portion 3 on the side opposite to the sealing portion 2 of the bulb 1 with the tip portion 51L. The exhaust pipe portion 3 is melted and buried in the pinch portion 31 which is forcibly pressed (viewed by a pincher die) by the pincher die, so that it is not only firmly fixed, but also the pincher die for crushing. As long as the position does not shift, the pincher opens and closes at the same position on each valve 1 and presses (viewed by the arrow),
Therefore, the support wire 5L existing in the exhaust pipe portion 3 of each valve 1 can be arranged at substantially the same portion. That is, the filaments 6 wire-supported by the long support wires 5L of the individual light bulbs can be arranged along the central axis at a predetermined position in the bulb 1. Further, when the exhaust pipe portion 3 is forcibly pressed in this way, the volume of the recess 32 remaining in the exhaust pipe portion 3 becomes small, and the recess portion 32 forms the coldest portion in a halogen bulb or the like. It is possible to prevent the halide from condensing.

Further, the cylindrical valve 1 having such a structure has a wall surface which is equidistant from the center axis of the valve 1 in the rotational direction, and visible light is transmitted and infrared rays are reflected on the wall surface of the valve 1. Since the film 7 is formed, the filament 6
As long as is arranged on the central axis, infrared rays emitted from the filament 6 return to the original filament 6 portion, and the filament 6 can be further heated.

That is, when the light bulb L is turned on, the double coil-shaped light emitting portion 61 in the center of the filament 6 arranged on the central axis of the bulb 1 generates heat and emits a large amount of infrared rays together with visible light. Of the light emitted from the portion 61, visible light passes through the bulb 1 and the light interference film 7 and is emitted to the outside of the bulb 1. In addition, the light emitting portion 61 of the filament 6
Infrared emitted from the light is reflected by the light interference film 7 and is emitted from the light emitting portion 6.
Returning to 1, the light emitting section 61 is heated to make the light emission higher, and as a result, the visible light emission from the light emitting section 61 is increased, and the light emission efficiency can be improved.

Further, in the light bulb L shown in FIGS. 1 and 2,
Although the visible light transmitting infrared reflecting film 7 is formed on the wall surface of the bulb 1, the present invention can be applied to the light bulb L in which the visible light transmitting infrared reflecting film 7 is not formed.

That is, even in a light bulb which is used by being assembled or attached to a reflecting mirror or a reflecting plate having aluminum or a dichroic film formed thereon, the light distribution characteristics greatly change depending on the position of the filament coil in the reflecting mirror. Therefore, in the case of the light bulb L having the fixed structure of the support described above, the filament coil position of each light bulb L is at a uniquely determined position on the central axis of the bulb.

Therefore, the bulb is mounted in the reflecting mirror of the instrument with the bulb as a reference, the filament coil is positioned at a predetermined position such as a focal portion, and the work can be easily performed. Further, this light bulb can obtain a predetermined light distribution characteristic and can firmly support the support wire and the filament coil so as not to be deformed even when vibration or impact is applied to the light bulb.

3 to 5 show the essential parts of a halogen light bulb L according to another embodiment of the present invention. The same parts as those shown in FIGS. 1 and 2 are designated by the same reference numerals and their description is omitted. Omit it.

In these examples, the structure of the connecting portion between the support wire 5L and the filament 6 is different. In the case of FIG. 3, the tip side 51L of the support wire 5L is bent into a U-shape 53L, and the exhaust pipe portion is formed. It is elastically contacted and positioned in the inside of the wire 3, and a single coil (coil-shaped part is omitted) -shaped leg part 63L of the filament 6 is inserted and fixed to the most distal end part 51L thereof.

Then, as in the above-mentioned embodiment, the exhaust pipe portion 3 containing the portion including the connecting portion between the support wire 5L and the filament 6 is heated and melted and bent into a U-shape of the support wire 5L. Pressed from both sides parallel to the surface (viewed from the arrow)
By doing so, the exhaust pipe pinch portion 31 is formed.
In this case, since the U-shaped portion is not overlapped as in FIGS. 1 and 2, the support wire 5L can be fixed in a predetermined position without being deformed by applying a small pressure, and the position of the filament coil 6 can be deviated. It can be prevented as much as possible.

In the case of FIG. 4, a single coil (coil-shaped portion is omitted) -shaped leg portion 63L of the filament 6 is arranged in parallel along the tip portion 51L of the support wire 5L. Is integrally connected and fixed by an auxiliary coil 55 formed by winding a tungsten wire or a molybdenum wire.

Then, as in the above-mentioned embodiment, the exhaust pipe portion 3 containing the portion including the connecting portion between the support wire 5L and the filament 6 is melted by heating and forcedly pressed by the pincher die, and the pinch portion. The tip portion 5 of the internal lead wire 5L
1L is buried. Also in the case of such a configuration, the same operation and effect as those of the above-described embodiment can be obtained.

Further, in the case of FIG. 5, the support wire 5L is coiled 5 at the tip of the support wire 5L, which is a separate lead wire 56 made of tungsten or molybdenum wire (which may be U-shaped).
The lead wire 56 is integrally fixed by being wound and fixed to 4 L, and one end side of the lead wire 56 is supported and connected by inserting the filament coil 6, and the other end side is inside the pinch part 31 of the exhaust pipe part 3. It is buried and fixed in.

In the case of such a construction, there is a large difference between the outer diameter of the support wire 5L and the inner diameter of the support portion at the end of the filament coil 6 inserted and connected to the support wire 5L, and there is a large difference in electrical and mechanical conditions. In the case where there is a concern about the physical connection, for example, the lead wire 56 side can be changed to have an appropriate outer diameter to make a strong connection, and the same operation and effect as those of the above-described embodiment can be obtained.

In the present invention, the bulb 1 having the optical interference film 7 formed therein has a cylindrical shape in the above-described embodiment. However, the bulb 1 has a spherical shape or a spheroid having a focal point on the central axis thereof. It may have a body shape or a combination of these shapes.

Further, the light bulb L of each of the above-mentioned embodiments is also used as a light bulb LR with a reflecting mirror as shown in FIG. For example, the bulb 1 of the light bulb L has a cylindrical portion 12 at both ends of a central elliptical portion 11, and the upper cylindrical portion 12 is provided with an exhaust pipe portion 3. The support wire 5L is embedded in the pinch portion 31 of the exhaust pipe portion 3 as in the above-described embodiment, and the filament 6 is formed.
Is supported along a central axis passing through the focal point of the bulb 1, and a visible light transmitting infrared reflecting film 7 is formed on the outer surface of the bulb 1.

In this reflector-equipped electric light bulb LR, the filament 6 is positioned near the focal point of the reflector R on which the visible light-reflecting infrared ray transmitting film R1 made of a dichroic film or a total-light reflecting film such as aluminum is formed on the inner surface. Light bulb L
The sealing agent 2 is placed in the accommodation hole R2 formed on the back side of the adhesive R
It is joined and fixed via 3 or the like. (Alternatively, a light bulb L with a base 8 as shown in FIG. 1 may be mounted in a socket (not shown) in the accommodation hole R2.) Also in the light bulb L, the filament 6 is supported on the central axis. As a result, visible light with a small amount of infrared rays can be efficiently radiated toward the front of the reflecting mirror R with directivity. Further, the halogen light bulb L shown in the above embodiment constitutes a lighting apparatus in which a reflecting mirror or a reflecting mirror having a reflecting surface such as an aluminum film or a dichroic film formed on the inner surface is housed in a housing, that is, a lighting fixture or a lamp. It may be attached to a member, and the opening of the reflecting mirror may be covered with a cover member such as a lens, if necessary.

The present invention is not limited to the above embodiment. For example, the type of bulb is not limited to halogen bulbs,
Of course, it can be applied to a light bulb of a type that does not contain halogen, and the application is not limited to light projection.

Further, in the above-mentioned embodiment, the exhaust pipe portion is provided on the side opposite to the sealing portion of the valve. However, this exhaust pipe portion is formed by connecting the exhaust pipe to the end portion of the valve or by reducing the diameter of a part of the valve. Or by forming a separate exhaust pipe in the sealing part and connecting a thin tube separately for fixing the support on the side opposite to the sealing part or by reducing the diameter of a part of the valve In the present invention, both the exhaust pipe and the thin pipe are called thin pipe.

Further, the pincher for closing the exhaust pipe portion is not limited to one pressed from two facing directions, and a cross section having a substantially quadrangular shape in which the entire circumference is divided into four equal parts and pressed from four directions is used. It doesn't matter.

Further, although the support is described as a linear one in the above embodiment, the support is not limited to a linear one and may be a plate or a bent plate. Also, the tip of the support, which is embedded and fixed in the pinch part of the exhaust pipe part, is not limited to a U shape, but is stable before the pinch as long as it is a U shape or a coil shape that abuts the inner wall of the exhaust pipe part. Although it can be supported by a straight line, it does not matter if it is a straight line. Further, even if the support (wire) extending from the sealing portion is separately connected with a lead wire as shown in FIG. 5 and integrated, these are collectively referred to as a support (wire) in the present invention. . Further, these supports (wires) may also serve as internal lead wires. Further, the configuration of the tip embedded portion of the support (wire) and the configuration of the support portion connecting the support (wire) and the filament are not limited to the embodiments.

Further, in the light interference film constituting the visible light transmitting infrared reflecting film, the high refractive index layer described in the embodiment is made of titanium oxide (T).
iO ₂ ) and the low refractive index layer are not limited to those made of silicon oxide (SiO ₂ ), but tantalum pentoxide (T
a ₂ O ₅ ), zirconium dioxide (ZrO ₂ ), zinc dioxide (ZnO ₂ ), niobium pentoxide (Nb ₂ O ₅ ), etc.
The low refractive index layer may be made of a material such as magnesium fluoride (MgF). Furthermore, the visible light transmitting / infrared reflecting film is not limited to the multilayer optical interference film, but may be a single layer film formed of a material such as tin oxide (SnO ₂ ). Furthermore, these visible light transmitting infrared reflecting films may be formed on at least one of the inner and outer surfaces of the bulb.

[0070]

As described in detail above, according to the first to fourth aspects of the present invention, the distal end side of the internal lead wire that supports the filament is thin tube portion (exhaust pipe portion).
It is inserted into the inside, is heated and melted, and is forcibly pressed by the pincher mold to be embedded inside so that it is not only firmly fixed, but also inside the narrow pipe part (exhaust pipe part) of each valve. The inner lead wires can be arranged in substantially the same portion. That is, the filaments connected to the inner lead wires of the individual light bulbs can be arranged along the central axis at a predetermined position in the bulb.

Therefore, if this light bulb is attached to a predetermined position of the reflecting mirror and turned on, the filament is positioned at the focal position of the reflecting mirror, and a predetermined light distribution characteristic can be exhibited with high efficiency.

Further, as a result of forcibly pressing and crushing the thin pipe portion (exhaust pipe portion), the volume of the recess remaining in the thin pipe portion (exhaust pipe portion) becomes small, and the recess forms the coldest portion in a halogen bulb or the like. As a result, it was possible to eliminate the possibility that the halide would condense and deteriorate the emission characteristics.

Further, according to the structure of claim 5, the support can be stably arranged at a predetermined position in the thin tube from before the pinch, and the support can be fixed at the predetermined position without moving during the pinch. Can be prevented from shifting. Therefore, it is possible to provide a highly efficient light bulb having a high light distribution characteristic and a high infrared feedback rate.

According to the structure described in claim 6, of the light emitted from the filament at the time of lighting, visible light passes through the bulb and the infrared reflection film and is emitted to the outside of the bulb, and the infrared rays are infrared rays. The light is highly reflected by the reflective film and returned to the filament, and the filament is further heated to further increase the light emission, and as a result, the visible light emission from the filament is increased, and the luminous efficiency of the light bulb can be improved.

According to the structure described in claim 7, if it is a multilayer optical interference film, the same effect as described in claim 6 can be obtained.

According to the structure described in claim 8, when it is applied to a light bulb with a reflecting mirror, the same effects as those described in claims 1 to 7 are obtained.

Further, according to the structure of claim 9,
In the lighting device equipped with the light bulb according to any one of claims 1 to 8, the same effects as those of the claims 1 to 8 are achieved.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional front view of a halogen light bulb showing an embodiment of the present invention.

2 (a) is a side sectional view showing a main part of FIG. 1, and FIG. 2 (b) is a lateral sectional view of the thin tube pinch portion as seen from above.

3A and 3B show a main part of another embodiment of the present invention, FIG. 3A is a front sectional view, and FIG. 3B is a lateral sectional view of the thin tube pinch portion as seen from the top surface.

4A and 4B show a main part of another embodiment of the present invention, wherein FIG. 4A is a front sectional view, and FIG. 4B is a lateral sectional view of the thin tube pinch portion as seen from above.

FIG. 5 is a front sectional view showing a main part of another embodiment of the present invention.

FIG. 6 is a front sectional view showing an embodiment of a light bulb with a reflecting mirror of the present invention.

[Explanation of symbols]

 L: Light bulb LR: Light bulb with reflecting mirror 1: Glass bulb 2: Sealing part 3: Thin tube part (exhaust tube part) 31: Thin tube pinch part (exhaust tube pinch part) 33: Pinch surface 5L: Long support (line) ) 51L: Tip part of support (line) 53L: U-shaped part 5S: Short size support (line) 6: Filament coil 7: Visible light transmitting infrared reflecting film R: Reflecting mirror

Claims (9)

[Claims] 1. A glass bulb having a sealing portion at one end and a thin tube pinch portion at the other end; a coiled filament arranged along the central axis of the bulb; extending from the sealing portion. One end side support that supports one end of the lever that is closer to the sealing part; and one end that extends from the sealing part and supports the other end of the filament farther from the sealing part and the other end The other end side support that supports the other end of the filament by being embedded in the glass of the thin tube pinch part; 2. The electric light bulb according to claim 1, wherein at least one of the one end side support and the other end side support also serves as an internal lead member. 3. An inner lead member that supports the other end of the filament at one end and is embedded in the glass of the thin tube pinch part at the other end at the tip of the other end side support extending from the sealing part. The light bulb according to claim 1 or 2, which is connected. 4. The light bulb according to claim 1, wherein the bulb partially includes a cylindrical, spherical or spheroidal portion. 5. The other end side support is bent in a U-shape having a surface substantially parallel to the pinch surface in the thin tube pinch portion, and the other end side support is bent. The light bulb described in. 6. The light bulb according to claim 1, wherein a visible light transmitting infrared reflecting film is formed on the surface of the bulb. 7. The light bulb according to claim 6, wherein the visible light transmitting infrared reflecting film is a multilayer optical interference film formed by alternately stacking high refractive index layers and low refractive index layers. 8. A reflecting mirror; and the light bulb according to claim 1, which is arranged in a housing hole formed on the back surface of the reflecting mirror. A light bulb with a reflector. 9. A lighting device comprising: a fixture or a lamp body; and the light bulb according to any one of claims 1 to 8 attached to the fixture or the lamp body.