JPH11213960A - Tubular bulb and luminairre - Google Patents

Abstract

PROBLEM TO BE SOLVED: To lower thermal influence due to radiation and transmission of heat from a filament, and to lower the temperature of a sealing part, and to provide a bulb with high power (high output) by forming a tip of a crushed sealing part of a tubular bulb into a narrow taper shape. SOLUTION: In a halogen lamp L1, a crushed sealing part 3 of a bulb 1 is housed in a through hole of a reflecting mirror 6 and bonded for fixation through a heat resistant adhesive agent. At this time, the halogen lamp L1 is fixed in the positioning condition so that a filament 4 is positioned at a focal point of a reflecting surface 61. Since a tip of a crushed sealing part 3 of the halogen lamp L1 is formed into a taper shape, the sealing part 3 can be inserted to a middle diameter 77 part of a recessed part 72. Namely, whole length of the bulb 1 can be prolonged. As a result, temperature of the sealing part is lowered, and temperature of a lead member 2 can be lowered, and generation of fused cutting of the lead member 2 and generation of breakdown and leak in the sealing part 3 are prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bulb suitable for spot lighting or the like, such as a halogen bulb or a bulb with a reflecting mirror, and a lighting apparatus equipped with such a bulb.

[0002]

2. Description of the Related Art Halogen lamps use a halogen cycle of halogen in which tungsten evaporating from a filament is sealed in a bulb, and return to the filament to prevent blackening of the bulb, improve efficiency and extend the life of the bulb. is there. This halogen bulb is designed to have a small diameter such as a tube shape so that the glass bulb is heated to a high temperature in order to smoothly carry out a halogen cycle.

[0003] The halogen bulb is used in combination with a reflector to exhibit higher efficiency. For example, a bulb with a reflector in which a bulb and a reflector having a bowl-shaped reflection surface are integrally combined. Because of its small size and high efficiency, it has recently been widely used in homes, stores, office automation equipment, and the like for downlights, spotlights, and optical devices.

[0004] For example, this light bulb RL with a reflecting mirror is shown in FIG.
The configuration is as shown in FIG. In FIG. 5, L is a sealed halogen bulb. This bulb L has a substantially rectangular crushed sealing portion 3 formed at one end of a bulb 1 made of quartz glass. Mo (molybdenum) in which the internal lead wires 21 and 21 and the external lead wires 22 and 22 are connected in the sealing portion 3
Sealing lead members 2 and 2 made of foil or the like are sealed.

[0005] The bulb 1 is filled with a halide such as CH ₂ Br ₂ (methylene dibromide) and an inert gas such as N ₂ (nitrogen) containing Ar (argon) and internal lead wires. A coil-shaped filament 4 serving as a light emitting source is connected between 21 and 21.

In the halogen lamp L, the crushed sealing portion 3 is accommodated in a through hole 63 of a neck portion 62 protruding from the center of the back surface of the bottom of the bowl-shaped reflecting mirror 6, and a heat-resistant adhesive (not shown). )) And are fixed. At this time, the halogen bulb L is fixed in an aligned state so that the filament 4 is located at the focal point of the reflection surface 61. Further, a visible light reflecting infrared transmitting film (not shown) such as a dichroic film forming a selective transmitting reflecting surface is formed on the reflecting surface 61 formed of a concave paraboloid of revolution or the like.

A housing portion 71 of a screw-type (E-type) base 7 is attached to the neck portion 62 of the reflecting mirror 6 to which the halogen lamp L is fixed, via a heat-resistant adhesive (not shown). They are joined. The screw-type base 7 is composed of an electrically insulating ceramic casing 71 having a concave portion 72 formed therein, a substantially cylindrical shape made of a metal plate or the like, a shell 73 provided with a spiral screw portion around the shell 73, and an eyelet terminal portion. 74.

[0008] The ceramic housing 71 is
One end has a large-diameter portion for accommodating the neck portion 62 of the reflecting mirror 6, and the other end has a small-diameter portion for covering the shell 73. Three steps are formed in a stepped manner formed by the portion 76, the middle diameter portion 77, and the through hole 78 of the external lead wire 22, and the largest diameter portion is connected to the neck portion 62 via an adhesive (not shown). Are joined.

[0009] The light bulb RL with a reflecting mirror having such a configuration is as follows.
The lamp is lit by attaching the base 7 to the socket of the lighting device.
In this lighting, light is emitted by energizing the coiled filament 4. In the case of the halogen lamp L1, the bulb 1 is heated by the luminous heat of the filament 4 so that a smooth halogen cycle is performed in order to obtain a predetermined luminous characteristic and life.
Is designed to be about 250 ° C. or higher.

As described above, if the bulb 1 is maintained at a high temperature, the temperature of the crushed sealing portion 3 at the end of the bulb 1 also rises due to radiant heat or conduction heat from the filament 4, and the inside of the sealing portion 3 is sealed. The temperature of the attached lead members 2, 2 for sealing and the external lead wires 22, 22 connected to the lead members 2, 2 also rises. Then, the external lead wires 22 and 2 in the atmosphere at high temperature
2 gradually oxidizes and reaches the portion inside the sealing portion 3 and finally reaches the connecting lead members 2 and 2 for sealing. Although the lead members 2 and 2 for sealing are made of an extremely thin material such as Mo (molybdenum) foil in consideration of the sealing property, they are inferior in corrosion resistance and strength. There is also a phenomenon that heat is added and eventually breaks. In addition, this is not limited to the breakage of the lead members 2 and 2, but may cause a safety problem such as leakage of the sealing portion 3 and breakage and scattering of the glass of the surrounding sealing portion 3.

[0011]

Therefore, in this type of bulb RL with a reflecting mirror, the Mo sealed in the crushable sealing portion 3 is used.
(Molybdenum) The temperature of the sealing lead members 2 and 2 such as foil is regulated to be 350 ° C. or less.

[0012] However, the current standard products can satisfy this temperature only in bulbs having a maximum power consumption of up to 75 W class, and if the entire length of the bulb 1 of the halogen bulb L1 is extended, higher power (higher output) is possible. It is conceivable, however, that it could not be realized in relation to the recess 72 in the ceramic housing 71 in which the crushed sealing portion 3 of the base 7 is accommodated.

This is because the inside of the concave portion 72 of the ceramic casing 71 of the current base 7 has a stepped shape in which a maximum diameter portion 75, a large diameter portion 76, a medium diameter portion 77 and a through hole 74 of the external lead wire 22 are formed. Although three step portions are formed, it has been considered to eliminate or reduce the middle diameter portion 77 and increase the large diameter portion 76,
If this configuration is changed, portions 7S and 7T where the thickness between the step portion and the outer wall becomes thin occur, and it has been found that these portions 7S and 7T have a problem in strength such as chipping.

According to the present invention, the current base can be used, and the temperature of the crushed sealing portion of the bulb valve is reduced.
It is an object of the present invention to provide a bulb capable of reducing damage to a sealing portion and a lighting fixture equipped with the bulb.

[0015]

According to a first aspect of the present invention, there is provided a glass bulb having a crushed sealing portion having a tapered portion formed at an end thereof, and the bulb is embedded in the sealing portion. A sealed member having a lead member, an enclosed gas sealed in the bulb, and a light emitting source connected to the lead member; including a reflective surface formed in a concave curved surface and a through hole provided in a bottom portion of the reflective surface. A reflector having a neck portion in which the crush seal portion of the valve is disposed in the through hole; and a housing portion joined to the neck portion of the reflector and receiving the tip end of the crush seal portion of the valve. And a screw-type base.

Since the front end of the crushed sealing portion of the bulb valve is formed in a tapered shape, the crushed sealing portion can be inserted deep into the concave portion of the base. As a result, it is possible to increase the overall length of the valve.
In this way, if the bulb with a reflector can be made longer than before without changing the overall length of the reflector or the base, the distance between the filament position in the bulb and the sealing part can be increased. In addition, the thermal effect of radiation and conduction from the filament can be reduced, and the temperature of the sealing portion can be reduced. Further, if the same temperature as in the related art is sufficient, a bulb with higher power (high output) can be obtained.

The tapered portion is not limited to a linear slope, but may be any shape in which the width of the sealing portion is gradually reduced, such as a shape obtained by connecting straight lines having different angles or a slightly curved shape. In short, any shape may be used as long as it can be inserted deeply (to near the bottom) of the bottomed cylindrical base.

The shape of the bulb bulb of the present invention is not limited to a tubular shape, but may be a curved surface such as a sphere, a spheroid, a paraboloid of revolution, or an ellipsoid of revolution, or a composite shape thereof. .

The shape of the reflecting surface of the reflecting mirror is not limited to a paraboloid of revolution, but may be a sphere, a spheroid, an ellipse of revolution, or a combination thereof.

A bulb according to a second aspect of the present invention is a glass bulb having a crushed sealing portion having a tapered portion formed at an end, a lead member embedded in the sealing portion, and a bulb inside the bulb. A sealed tube having a sealed gas and a light emitting source connected to the lead member; and a screw-type base having a housing for receiving a tip of a crushed sealing portion of the bulb. It is characterized by having.

The present invention is applied to a tube in which a sealed tube having no integral reflecting mirror and a base are directly joined to each other, and has the same effect as that of the first aspect. Further, the bulb is not limited to the one-end sealed type, and may be a both-end sealed type.

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

A bulb having a visible light transmitting infrared reflecting film formed on the surface of the bulb and having a higher temperature than a bulb in which a coating is not formed in combination with a reflector is similar to the above-mentioned aspect. It works. That is, the visible light transmitting infrared reflecting film formed on at least one of the inner and outer surfaces of the bulb returns infrared light emitted from the filament to the filament, reheats the filament to increase the light emission, and as a result, the visible light from the filament Light emission can be increased.

The visible light transmitting infrared reflecting film formed on the reflecting surface when combined with a reflecting mirror is formed by alternately layering a high refractive index layer and a low refractive index layer. Titanium dioxide (TiO ₂ ), tantalum pentoxide (Ta ₂ O ₅ ), zircon dioxide (ZrO)
₂ ) or zinc dioxide (ZnO ₂ ), such as silicon oxide (SiO ₂ ) or magnesium fluoride (MgF)
Any of these may be selected from the above. In short, it is sufficient that the materials to be combined have a difference in refractive index. The visible light transmitting infrared reflecting film can be formed by a dipping method, an evaporation method, a sputtering method, an ion plating method, or the like.

The total light reflection film can be selected from aluminum (Al), silver (Ag), gold (Au), chromium (Cr) and the like.

According to a fourth aspect of the present invention, the light emitting source comprises a coiled filament or a discharge electrode.

The present invention is applied to a bulb using a coil-shaped filament as a light emitting source and a discharge lamp using a discharge electrode as a bulb, and has the same effect as the above-described claims. Further, the light bulb is not limited to a halogen light bulb, but may be other types of light bulbs, and the discharge lamp may be applied to a high pressure discharge lamp such as a metal halide lamp or a mercury lamp. Further, the bulb to which the present invention is applied may be a bulb for use in homes, stores, office automation equipment, and the like for light emission for downlights, spotlights, optical devices, and the like.

[0028] A tube according to a fifth aspect of the present invention is characterized in that a light control body is provided on the front surface of the reflecting mirror.

When the front surface of the reflecting mirror is covered with a lens, a prism, a filter, or the like, the temperature of the inner bulb rises further due to the hermetically sealed state. However, the temperature rise can be suppressed by applying the present invention. Also, by covering the front surface with a lens, prism, filter, etc., the light emission characteristics such as light distribution can be changed, and by providing a translucent protective cover, it is possible to prevent dirt on the reflective surface and tube surface, The scattering prevention at the time of rupture of the bulb bulb is achieved.

In the case of a transparent cover, the luminous efficiency can be improved by applying an antireflection agent such as magnesium fluoride (MgF) to the surface.

According to a sixth aspect of the present invention, there is provided a lighting fixture, comprising: a fixture main body; a socket disposed on the fixture main body; and a bulb according to any one of claims 1 to 5 mounted on the socket. ; Characterized by having;

[0032] The lighting apparatus equipped with the tube having the functions described in claims 1 to 5 can be used for a long period of time without damage to the tube, so that it is possible to reduce the time and effort for replacement.

[0033]

Embodiments of the present invention will be described below with reference to the drawings. Fig. 1 is 110V rated for small light projection
FIG. 2 is a partial cross-sectional front view of a 75-W bulb RL1 with a reflector.
FIG. 2 is an enlarged longitudinal sectional view showing a part of a visible light transmitting infrared reflecting film formed of a multilayer light interference film formed on a surface of a bulb.

In the figure, L1 is a sealed halogen bulb,
This light bulb L1 has a bulb 1 made of hard glass such as quartz glass or aluminosilicate glass having a straight tube shape, and internal lead wires 21 and 21 and external lead wires 22 and 22 are connected to one end of the bulb 1. A sealing lead member made of a metal foil or a metal wire, in this case, a pair of Mo (molybdenum) foils 2 and 2 is formed with a crushed sealing portion 3, and an exhaust pipe is provided at the other end of the valve 1. 11 is connected.
Further, both wings at the tip of the crushing sealing portion 3 are formed with tapered tapered portions 31, 31.

Further, the internal lead wires 21 inside the valve 1,
A coil-shaped filament 4 wound with a tungsten wire serving as a light-emitting source is connected between the wires 21 and is disposed substantially along the central axis of the bulb 1. Also, C
A halide such as H ₂ Br ₂ (methylene dibromide) and an inert gas such as N ₂ (nitrogen) containing Ar (argon) are sealed.

On the outer surface of the bulb 1, a visible light transmitting infrared reflecting film (hereinafter referred to as a red film) 5 is formed. This red film 5 is shown in an enlarged manner in FIG.
On the glass surface of the bulb 1, metal oxides such as TiO ₂ (titanium dioxide) for forming the high refractive index layer films 5H,... And metal oxides such as SiO ₂ (silicon dioxide) for forming the low refractive index layer films 5L,. And a multilayer optical interference film in which a predetermined number of layers are laminated.

The visible light transmitting infrared reflecting film 5 is formed by alternately laminating two kinds of films having different refractive indexes to form a multilayer, and by appropriately selecting the number of layers and the thickness of the layers, utilizing the interference of light, It selectively transmits and reflects light in a desired wavelength range. The greater the number of the high and low refractive index layer films, the higher the infrared reflectance, the higher the luminous efficiency, and the greater the power saving effect.

Reference numeral 6 denotes a reflecting surface 61 made of quartz glass, such as quartz glass, hard glass, a heat-resistant synthetic resin or a metal plate, and selected from a concave paraboloid of revolution having a focus on the inner surface. It is a bowl-shaped reflecting mirror having a diameter of about 50 mm. The neck portion 62 protruding from the center of the rear surface of the bottom of the reflecting mirror 6 is provided with a through hole 63 for accommodating the crushed sealing portion 3 of the bulb L1. The reflecting surface 61 formed on the concave curved surface of the reflecting mirror 6 has a visible light reflecting infrared transmitting film such as a dichroic film forming a selective transmitting reflecting surface, or an all light reflecting film made of Cr (chrome). In the figure, a visible light reflecting infrared transmitting film (not shown) is formed.

In the halogen lamp L1, the crushed sealing portion 3 of the bulb 1 is accommodated in the through hole 63 of the reflecting mirror 6 and is fixedly joined thereto with a heat-resistant adhesive (not shown). At this time, the filament 4 is focused on the reflection surface 61.
Position the halogen bulb L
1 is fixed.

Reference numeral 7 denotes an existing screw-type base, which is an electrically insulating ceramic housing 71 having a recess 72 formed therein.
For example, an E11 type having a shell 73 and an eyelet terminal portion 74 formed in a substantially cylindrical shape with a metal plate or the like and provided with a helical screw portion on the periphery. The ceramic casing 71 has a large-diameter portion on one end side for accommodating the neck portion 62 of the reflecting mirror 6 and a small-diameter portion on the other end side for covering the shell 73. The inside of the concave portion 72 is the largest diameter portion 7
5, three steps are formed in a stepwise fashion comprising a large diameter portion 76, a medium diameter portion 77, and a through hole 78 of the external lead wire 22, and a heat-resistant adhesive (not shown) at the largest diameter portion.
The neck portion 62 of the reflecting mirror 6 is joined and fixed via the.

At this time, since the crushed sealing portion 3 of the halogen lamp L1 has a tapered tapered tip, it can be inserted into the middle diameter portion 77 of the concave portion 72. That is, the overall length of the valve 1 can be made longer than that of a conventional product.

Then, the bulb RL1 with a reflector having the configuration shown in FIG. 1 is mounted on, for example, a lighting fixture 9 shown in FIG. The lighting fixture 9 has a fixture main body 94 attached thereto via a universal joint 93 provided at a lower end of a pole 92 hanging down from a base 91 attached to a ceiling or the like. The light bulb RL1 with the reflecting mirror is provided with a shell 7 of the base 7.
The three parts are mounted by being screwed into a socket (not shown) provided in the base 94.

When the lamp RL1 with the reflector mounted on the lighting apparatus 9 is energized from a power source (not shown) via a lighting device, the filament 4 of the halogen lamp L1 emits light. A large amount of infrared light is emitted from the filament 4 together with the visible light, and most of the light emitted from the filament 4 passes through the bulb 1 and the red film 5 and is emitted to the outside of the bulb 1. In addition, the wavelength range of 700 to 1500 nm radiated from the filament 4 is
Infrared light up to about 000 nm is reflected by the red anti-reflection film 5 and returned to the filament 4 (the emission of the infrared light from the filament 4 and the reflection at the red anti-reflection film 5 are repeated). The filament 4 is reheated to emit light. , So that the visible light emission from the filament 4 can be increased.

The light emitted from the halogen lamp L1 is directed toward the opening of the reflecting mirror 6 or is incident on the visible light reflecting infrared transmitting film (not shown) of the reflecting mirror 6, and the visible light is visible. The light is reflected by the light-reflecting infrared transmitting film and directed toward the opening of the reflecting mirror 6 to emit a predetermined light. Also,
Infrared light that has entered a visible light-reflecting infrared transmitting film (not shown) passes through this coating and the glass of the reflecting mirror 6 and is emitted to the back of the reflecting mirror 6, and the infrared light is reduced from the front side of the reflecting mirror 6. Light emission is performed.

As described above, the bulb RL1 with a reflector according to the present invention is housed in the reflector 6 and the cap 7 without changing the overall length and the cap, even if the bulb 1 on the halogen bulb L1 side is made longer than before. it can. This valve 1
May be the sealing portion 3, a portion excluding the sealing portion 3, or both portions.

Therefore, the filament 4 in the bulb 1
Since the distance between the position and the sealing portion 3 can be increased, thermal effects due to radiation and conduction from the filament 4 can be reduced. Then, the temperature of the sealing portion 3 is reduced, so that the temperature of the Mo (molybdenum) foil 2 can be lowered, so that fusing due to oxidation of the Mo (molybdenum) foil 2, and destruction and leakage of the sealing portion 3 can be prevented. .

Further, the fact that the temperature of the sealing portion 3 can be reduced means that if the dimensions of the bulb 1 are the same, higher power (high output) can be obtained.
Can be used. Valve 1
If the total length of the lamp RL1 is the same as that of the conventional product, the length of at least one of the reflecting mirror 6 and the base 7 can be shortened to make the bulb RL1 with a reflecting mirror smaller.

According to the experiment conducted by the inventor, the rated voltage was 110 V7.
In the case of a 5 W light bulb with a reflecting mirror, a halogen light bulb (a light-reflecting infrared ray transmitting film is formed on the bulb surface of each light bulb) has the same Mo foil temperature as the conventional light bulb, the present invention light bulb and the conventional light bulb. Table 1 shows the results of testing the allowable power (W) of the filament that can be accommodated. (Note that the same dimensions and conditions were used except for the following.)

[Table 1] The tapered portions 31, 31 at the tip of the crushed sealing portion 3 of the halogen lamp L1 are formed by crushing the sealing portion 3 using a crushing mold or conventional molding, and then cutting the end portion with a cutter. It can be obtained by cutting with such as. Also,
The tapered portions 31, 31 are not limited to linear inclinations,
It is sufficient that the width of the sealing portion is gradually reduced, such as a shape obtained by connecting straight lines having different angles or a slightly curved shape. In other words, an insulator deep in the bottomed cylindrical base 7 (to the bottom). Any shape can be used as long as it can enter without contacting the surface.

FIG. 4 shows another embodiment of the present invention. In the drawing, the same parts as those in FIG. 1 are denoted by the same reference numerals, and the description thereof will be omitted. FIG. 4 is a partial sectional front view of a halogen lamp L2 with a base, and the sealed halogen lamp has substantially the same shape as that of the above embodiment.

In the halogen lamp L2, tapered portions 31, 31 are formed on both wings at the tip of the crushable sealing portion 3 at the end of the bulb 1.

The base 7 is a screw-type base having substantially the same shape as that of the above-described embodiment, and is formed in a substantially cylindrical shape by an electrically insulating ceramic housing 71 having a recess 72 formed thereon and a metal plate. It is, for example, an E11 type having a shell 73 and an eyelet terminal portion 74 formed and provided with a helical screw portion around the periphery. The inside of the concave portion 72 of the ceramic housing portion 71 is formed in a stepped shape including a large diameter portion 76, a tapered middle diameter portion 77, and a through hole 78 of the external lead wire 22.

Then, with the tapered portions 31, 31 tapering at the end of the valve 1 penetrating into the middle diameter portion 77, the heat-resistant adhesive 7 is applied to the large diameter portion 76 on the opening side.
The crush sealing portion 3 housed via C is fixedly joined.

At this time, since the crushed sealing portion 3 of the halogen lamp L1 has a tapered tapered tip, it enters the tapered medium diameter portion 77 in the concave portion 72. be able to. That is, the overall length of the valve 1 can be made longer than that of a conventional product.

Therefore, also in this case, since the distance between the position of the filament 4 in the bulb 1 and the sealing portion 3 can be increased, the temperature of the sealing portion 3 can be reduced to prevent breakage and leakage of the sealing portion 3. In addition, since the temperature of the sealing portion 3 can be lowered, it is possible to use the filament 4 with higher power (high output), or it is possible to reduce the total length of the bulb 1 to make the bulb L2 smaller than conventional products. Having.

The present invention is not limited to the above embodiment. For example, the bulb is not limited to a halogen bulb, but may be another type of bulb or a high-pressure discharge lamp such as a metal halide lamp or a mercury lamp. In the case of a lamp, it refers to a discharge electrode.

Further, it is not essential to form a visible light transmitting infrared reflecting film on the surface of the bulb bulb, and the bulb temperature at the time of lighting is lower in the bulb without this coating, but the bulb temperature is lower. The same operation and effect can be obtained that the temperature of the sealing portion can be further reduced.

In the case of a bulb with a reflecting mirror, as shown in FIG.
A light control body 8 such as a light-transmitting protective cover for protecting a prism, a filter, a valve, or a reflective film may be provided.

Further, the luminaire is not limited to the above embodiment. For example, in the case of a luminaire for lighting a tube having no reflector, a reflector may be separately provided.

[0059]

According to the first aspect of the present invention, the temperature of the crushed sealing portion can be reduced, and there is no short life such as breakage of the lead member in the sealing portion, breakage of the sealing portion or leakage. At the current temperature, a light source with higher power (high output) can be used. In addition, it is possible to provide a tube with a reflecting mirror that can be used as it is and is easy to manufacture, and that is excellent in quality and productivity.

According to the second aspect of the present invention, it is possible to provide a tube with a base having the same effects as the first aspect and having excellent quality and productivity.

According to the third aspect of the present invention, the same effect as described in the first and second aspects is obtained in a bulb having a visible light transmitting infrared reflecting film formed on the surface of the bulb.

According to the fourth aspect of the present invention, the same effects as those of the first to third aspects can be obtained by applying the present invention to various electric bulbs and discharge lamps.

According to the fifth aspect of the present invention, the first aspect has the following features.
In addition to providing the same effects as described in 3 and 4, the luminous characteristics such as the light distribution are improved or changed, or the surface of the bulb bulb and the reflecting surface can be prevented from being stained. Can prevent scattering.

According to the sixth aspect of the present invention, since the tube having the effects described in the first to fifth aspects is mounted, it is possible to provide a lighting fixture which is easy to maintain.

[Brief description of the drawings]

FIG. 1 is a partially sectional front view showing an embodiment of a bulb (a bulb with a reflecting mirror) of the present invention.

FIG. 2 is an enlarged longitudinal sectional view showing a part of a visible light transmitting infrared reflection film made of a multilayer light interference film formed on a surface of a bulb.

FIG. 3 is a perspective view showing an embodiment of the lighting fixture of the present invention.

FIG. 4 is a partial cross-sectional front view showing another embodiment of the bulb (bulb) of the present invention.

FIG. 5 is a partially sectional front view showing a conventional light bulb with a reflecting mirror.

[Explanation of symbols]

 L1, L2: sealed bulb (sealed halogen bulb) RL1: bulb with reflecting mirror (halogen bulb with reflecting mirror) 1: glass bulb 2: lead member 3: crushed sealing portion 4: filament 5: visible Light transmitting infrared reflecting film (multilayer light interference film) 6: Reflecting mirror 61: Reflecting surface 62: Neck 63: Through hole 7: Screw-in base 71: Housing 72: Concave 73: Shell 8: Light control body 9 : Lighting fixture 94: Fixture body

Claims (6)

[Claims] 1. A glass bulb having a crushed sealing portion having a tapered portion formed at an end portion, a lead member embedded in the sealing portion, a sealed gas sealed in the bulb, and a lead member. A sealed bulb having a light emitting source; and a neck portion including a reflective surface formed in a concave curved surface and a through hole provided in a bottom portion of the reflective surface, and a crushable sealing portion of the bulb is disposed in the through hole. And a screw-type mouthpiece having a housing joined to the neck of the reflector and receiving the tip of the crushable sealing portion of the bulb. Tube. 2. A glass bulb having a crushed sealing portion having a tapered portion formed at an end portion, a lead member embedded in the sealing portion, an enclosed gas sealed in the bulb, and a lead member. A bulb comprising: a sealed bulb having a light-emitting source; and a screw-type base having a housing for receiving a tip of a crushed sealing portion of a bulb. 3. The bulb according to claim 1, wherein a visible light transmitting infrared reflecting film is formed on a surface of the bulb. 4. The tube according to claim 1, wherein the light emitting source comprises a coiled filament or a discharge electrode. 5. The bulb according to claim 2, wherein a light control body is provided on a front surface of the reflecting mirror. 6. A device main body; a socket disposed on the device main body; and the bulb according to any one of claims 1 to 5 mounted on the socket. lighting equipment.