JP2002298637A - Bulb, bulb with reflecting mirror, and illumination apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bulb, a bulb with reflecting mirror and an illumination apparatus that can prevent breakdown of the mount and the bulb by extinguishing arc in a short time, when arc discharge is generated at the time of filament break. SOLUTION: These are an electric bulb L1, a bulb with reflecting mirror and an illumination apparatus that comprise a pair of inner lead wires 32, 33 that are provided stretched in the bulb 1, a glass bead 30 that embeds and fixes the pair of inner lead wires 32, 33, a coil shape filament 5 that is connected to the pair of inner lead wires 32, 33, a pair of metal thin wires 4, 4 that are provided separated each other between a sealing part 11 and the glass bead 30 and are connected to the sealed conductor 2 at one end and connected to the inner lead wire 32, 33 at the other end, and have thinner diameter than these inner lead wires, an outer lead wire that is connected to the other end of the sealed conductor 2 and led to the outside of the bulb 1, and a sealed gas that is filled in the bulb 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light bulb having improved safety by preventing the burst of a bulb and a lighting apparatus equipped with the light bulb.

[0002]

2. Description of the Related Art Halogen light bulbs have recently been widely used in homes and stores for downlights and spotlights because of their small size and high efficiency. This halogen lamp uses a halogen circulation cycle in which tungsten evaporated from the filament is sealed in the bulb, returns the filament to the filament, prevents blackening of the bulb, increases efficiency, and extends the life.

[0003] In addition to the halogen lamp, when the filament is broken, an arc discharge may be generated in the gap between the broken portions. When the arc discharge continues, the arc discharge causes the filament and a part of the internal lead wire to melt and scatter, and the red hot high-temperature ingot collides with the glass bulb portion, or the sealing in which the processing distortion remains. As a result of applying a thermal shock to the portion, a crack is formed in the valve, which rarely causes a phenomenon that the valve does not stop at the crack but ruptures.

Further, in this halogen bulb, the temperature of the glass bulb is set to 250 ° C. in order to smoothly perform the halogen cycle.
It is designed in a small tube shape as described above, and the pressure of the inert gas sealed in order to increase the efficiency is 1.5 ×
It is raised to 10 ^{5 to} 7.0 × 10 ⁵ Pa (Pascal).

Hard glass such as quartz glass or alumina silicate glass is used as a valve material for coping with such high temperature, high pressure and corrosion resistance. However, even if the glass is strong against these conditions, if the bulb surface has scratches or strong residual distortion due to thermal processing, the cracks caused by the scratches and the like will grow due to the internal pressure increased when the bulb is turned on. This may occur in the bulb, causing the bulb to rupture and the glass shards to fly in all directions, causing personal injury or damaging displayed products.

Even if an arc discharge due to the electric factor occurs, if the electric circuit is immediately cut off, the arc discharge does not continue. Therefore, a part of a lead wire supporting the filament and making an electrical connection, usually an external lead. This is dealt with by providing a current fuse on part of the wire.

However, with this current fuse, the allowable range for overcurrent is wide, and the current fuse is not cut off rapidly. When the filament is broken, the arc discharge continues and the filament and the lead wire are melted and scattered to the filament holding member. In the case of an external lead wire, an excessive current causes an arc to be generated even when the fuse is blown inside the base, and the ingot of the fuse breaks the base and the insulation of the base and welds to the socket. There are problems such as making it difficult to withdraw.

Accordingly, various means have been developed for extinguishing the arc in the bulb in the bulb. In this valve, the internal lead wire portion has a fuse function, for example, by reducing the lead wire diameter in the sealing portion, the stress such as sealing pressure and thermal shock applied to the sealing portion when an arc is generated is reduced. Although a method for reducing the noise (Japanese Unexamined Patent Application Publication No. 11-329371) and providing a fuse on a part of the internal lead wire (Japanese Unexamined Patent Application Publication No. 2-210755) are disclosed, rapid and reliable disappearance is achieved. I can't.

In the former case, a reduced diameter part of the internal lead wire is buried and formed in the sealing portion, and the mount made of the internal lead wire, filament, stem (glass) or the like is supported in the bulb. However, performing the most heavy load on the lead wire with the reduced diameter of the base part is unstable in terms of weight when the bulb is subjected to vibration or impact, and structural failure before the arc was handled There is a fear of.

In the latter mount, a pair of internal leads are supported by two glass rods, but the mount is substantially supported by one internal lead.
When receiving vibration or impact, there is a possibility that a problem may occur in strength. It is possible to cope with this by increasing the diameter of the internal lead wires.However, when embedding a metal lead wire in quartz glass, it is not possible to embed them in close contact because they have different coefficients of thermal expansion. However, the larger the diameter, the worse the adhesiveness and the lower the strength.

[0011]

SUMMARY OF THE INVENTION According to the present invention, if an arc discharge occurs at the time of a filament break without reducing the strength of the mount supporting the filament, the arc disappears in a short time and the mount or valve is not mounted. An object of the present invention is to provide a light bulb, a light bulb with a reflecting mirror, and a lighting device that can prevent destruction.

[0012]

Means for Solving the Problems In the present invention and the following inventions, definitions and technical meanings of the terms are as follows unless otherwise specified.

According to the present invention, responsiveness to an overcurrent such as when arc discharge continues is improved.

The light bulb to which the present invention is applied is not limited to a light-emitting halogen light bulb, but may be a light bulb for other uses or another kind of light bulb that does not enclose halogen. The portion is not limited to one end, and may be provided at both ends of the valve. Also, the sealing part is not limited to the crushing sealing part,
The sealing portion formed by shrinking the valve may be used. The sealing conductor is not limited to a metal foil such as molybdenum foil, and a linear sealing member may be used.

The material of the glass bulb may be a hard glass such as quartz glass, aluminosilicate glass or borosilicate glass, or a soft glass made of soda lime glass or lead glass. The shape is not particularly limited as long as it has a bulge such as a tube, a sphere, a spheroid, a parabola or an ellipsoid of revolution.

The direction in which the filaments are arranged is not limited to the direction along the valve axis, but may be perpendicular to the valve axis.

A thin metal wire having a diameter smaller than that of the internal lead connected in series with the internal lead connected to the filament acts as an arc extinguishing member with a wire that melts in response to an overcurrent. As this thin metal wire, tungsten W, molybdenum Mo, tantalum Ta, or the like can be used. Also,
The wire diameter and length may be appropriately selected according to the rating of the applicable bulb.

As a material of a metal member such as a lead wire constituting a mount, tungsten W, molybdenum Mo, and rhenium
And tantalum Ta, and in the case of other light bulbs, nickel Ni, copper Cu, iron Fe, etc. can be used in addition to the above materials.

The internal lead wires and the support wires are
Their uses and actions are similar and sometimes shared,
There is no particular limitation on the name.

Further, the present invention uses not only a thin metal wire for arc extinction provided in the bulb, but also a fuse mainly composed of monel metal, constantan, nickel-manganese alloy, nickel or / and copper, etc. for an external lead wire portion. No problem.

According to a first aspect of the present invention, there is provided a light bulb, a glass bulb having a sealing portion formed at least at one end, a pair of sealing conductors hermetically sealed in the sealing portion, and the sealing portion. A pair of internal lead wires having one end embedded and fixed and extending into the bulb, a glass bead having the pair of internal leads embedded and fixed, and a coiled filament connected to the pair of internal leads, A pair of thin metal wires having a diameter smaller than that of the internal lead wire, which are disposed apart from each other between the sealing portion and the glass bead, and have one end connected to the sealing conductor and the other end connected to the internal lead wire. And an external lead wire connected to the other end of the sealing conductor and led out of the bulb, and a sealed gas sealed in the bulb.

According to a second aspect of the present invention, there is provided a light bulb, a glass bulb having a sealing portion formed at least at one end, a pair of sealing conductors hermetically sealed in the sealing portion, and the sealing portion. A pair of support wires having one end embedded and fixed and extending into the bulb, a glass bead having the pair of support wires embedded and fixed, and being opposite to the sealing portion while being embedded and fixed in the glass bead. A pair of internal lead wires extending in the direction, a coiled filament connected to the pair of internal lead wires, and one end are disposed between the sealing portion and the glass bead while being separated from each other. A pair of fine metal wires having a diameter smaller than that of the internal lead wire, the other end of which is connected to the internal conductor, and an external lead wire connected to the other end of the sealing conductor and led out of the valve. Enclosed in the above valve Characterized in that it comprises a sealed gas.

[0023] In the light bulb according to the third aspect of the present invention, the thin metal wire is made of a tungsten wire, and the thin metal wire is made of 1.3 filaments.
It is characterized by having a current capacity of twice or less.

The thin metal wire has a slightly larger current capacity than the filament, and easily breaks when an overcurrent flows.

A bulb according to a fourth aspect of the present invention is characterized in that the diameter of the inner lead wire supporting the glass bead is 150% or more of the diameter of the thin metal wire.

The thin metal wire has a small diameter next to the filament and does not have the strength to support the mounting member as an internal lead wire.

According to a fifth aspect of the present invention, there is provided a light bulb, wherein the thin metal wire is embedded in the sealing portion at an end through a conductive wire having a diameter larger than that of the thin metal wire.

A light bulb according to a sixth aspect of the present invention is characterized in that a fuse is connected in series to at least a part of the external lead wire portion.

A bulb according to a seventh aspect of the present invention is characterized in that a halide and an inert gas are sealed in the bulb, and a visible light transmitting infrared reflecting film is formed on the surface of the bulb. And

According to an eighth aspect of the present invention, there is provided a light bulb with a reflector, comprising a reflector and the light bulb according to any one of the first to seventh aspects housed in a neck portion of the reflector. It is characterized by the following.

The sealing portion of the bulb is fixed to the neck portion of the reflector via a heat-resistant adhesive, or a socket is provided at a portion corresponding to the neck portion, and the base portion of the bulb is attached, and the two are integrated. By doing so, the same effects as those described in the above-described claims 1 to 7 can be obtained without changing the light distribution maintaining characteristics during the lifetime.

According to a ninth aspect of the present invention, there is provided the luminaire, wherein the luminaire main body, the reflector disposed on the luminaire main body, and the reflector are optically opposed to the reflector. And a light bulb according to any one of the above.

A base may or may not be attached to the end of the bulb with a reflector.

The lighting fixture according to claim 10 of the present invention is
It is characterized by comprising an appliance main body and a light bulb with a reflecting mirror according to claim 9 disposed in the appliance main body.

The light bulb with a reflector according to the ninth aspect mounted on the socket of the instrument body has the same function as the ninth aspect.

[0036]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. Fig. 1 is a rating 1 for a small projector
It is a front view of a 10 / 100V type halogen bulb L1.

The bulb 1 has a straight tubular shape made of quartz glass, and has a crushed sealing portion 11 formed at one end by sealing a pair of metal foils 2 and 2 made of molybdenum Mo or the like as a sealing conductor. . An exhaust pipe 12 is provided at the other end of the valve 1.
Is connected.

The bulb 1 has an outer diameter of about 10 mm, a wall thickness of about 1 mm, an overall length of about 50 mm, and an overall length including a base to be described later of about 60 to 70 mm.

In the valve 1, a pair of support wires 31,
One end of 31 is embedded and fixed in the crush sealing portion 11, and the other end extending into the bulb 1 is embedded and fixed in a glass bead 30 made of quartz glass. Further, one end of each of two long and short internal lead wires 32 and 33 and an anchor 39 is embedded and fixed in the glass bead 30.

On the other end of the bent inner lead wires 32, 33, single-coil leg portions 51, 51 at the ends of a double-coil filament 5 wound with a thin tungsten wire.
Are connected to the internal lead wires 32 and 33 by means such as welding or hooking, and the filament 5 is disposed along the central axis in the bulb 1. The other end of the anchor 39 is wound near the center of the light emitting portion of the filament 5.

Each metal foil 2 and each internal lead 3
Metal thin wires 4 and 4 are connected between one ends of the support wires 2 and 33, and the support wires 31 and 31 and the internal lead wires 32 and
33, anchor 39, glass bead 30, metal wires 4, 4 for arc extinction, metal foils 2, 2, and these metal foils 2, 2
The mount 3 is constituted by an external lead wire (not shown) connected to the other end of the mount 3. Note that a fuse line is connected to a part of the external lead wire.

The support wires 31, 31, the internal lead wires 32, 33 and the anchor 39 are made of a tungsten wire having a wire diameter of about 0.3 mm, and the thin metal wires 4, 4 are made of a tungsten wire having a wire diameter of about 0.13 mm. It consists of a tungsten wire.

The filament 5 in the form of a double coil has a wire diameter of 0.052-0.055 mm and a length of 590-6.
20mm tungsten (W) wire with 1st pitch of 20
0-230%, coil diameter 0.3-0.5mm, length 60
６５65 mm, 2nd pitch is 150 to 160%, coil diameter is 1.6 to 1.8 mm, length is 8.0 to 10.0 mm.

A small amount of a halide such as CH ₂ Br ₂ or CH ₃ Br and a mixture gas of krypton (Kr) and nitrogen (N ₂ ) are contained in a valve 1 having an internal volume of about 1.4 cc at room temperature. (At 25 ° C.) and about 1.8 × 10 ⁵ Pa (Pascal).

Also, in the peripheral portion of the outer surface of the valve 1,
Visible light transmitting infrared reflecting film (hereinafter referred to as red film) 6
Is formed. The red anti-reflection film 6 is formed by alternately repeating titanium dioxide (TiO ₂ ) for forming a high-refractive-index layer film and silicon dioxide (SiO ₂ ) for forming a low-refractive-index layer film on the glass surface of the bulb 1. It consists of a laminated multilayer optical interference film.

In the figure, reference numeral 7 denotes a base. The base 7 is attached to a main body 71 having a large-diameter portion made of ceramic such as steatite or cordierite and having a cavity therein, and the small-diameter portion. Shell 72 and a top eyelet 73. Then, the crushed sealing portion 11 at the end of the valve 1 is housed in the hollow portion in the large diameter portion, and the two are joined via an adhesive, and the shell 72 and the eyelet portion 73 are connected so that the ends of the external lead wires do not short-circuit with each other. Are electrically connected to each other by means such as welding or brazing.

When the light bulb L1 having such a configuration is mounted on the socket and energized, the external lead wire (not shown), the metal foil 2, and the thin metal wire for arc extinction are provided via the shell 72 and the eyelet portion 73 of the base 7. 4-Internal lead 32 (3
3)-A current flows through the filament 5 through the leg portion 51 of the filament 5, and the filament 5 emits light.

In the light bulb L1, the filament 5 disposed along the central axis of the bulb 1 generates heat and emits a large amount of infrared light together with visible light. Is the valve 1 and the red film 6
And emitted to the outside of the bulb 1. In addition, infrared rays of about 780 nm to about 2,000 nm emitted from the filament 5 are reflected by the red anti-reflection film 7 and returned to the filament 5. The reflection is repeated.)
The filament 5 is reheated to increase the light emission. As a result, visible light emission from the filament 5 increases, and the luminous efficiency can be improved.

When the bulb L1 is turned on, the pressure of the inert gas sealed in the bulb 1 is 2.about.3 times that at normal temperature.
6 to 5.4 × 10 ⁵ Pa,
000-1100Lm and rated life 2000-240
0 hours could be obtained.

When the filament 5 of the bulb L1 is broken due to wear or the like, even if an arc discharge or the like occurs between the ends of the broken portion, the arc is not large and the arc is provided on the external lead wire portion due to overcurrent. If the fuse (not shown) blows, there is no problem.

However, if the fuse does not blow and the arc reaches the filament 5 and the internal lead wires 32 and 33 and the arc continues, the wire diameter is slightly smaller than the tungsten wire of the filament 5 connected in series with the filament 5. The thin metal wire 4 made of a thick tungsten wire is overheated and melted to cut off the current supply to the internal lead wires 32 and 33, thereby extinguishing the arc. That is, the thin metal wire 4 functions as an arc extinguishing device.

At this time, the arc can be extinguished in a short time (instantaneously) without sustaining the arc due to the action of the arc extinguishing tungsten wire 4 which has a higher resistance portion than the arc portion near the filament 5. it can. In addition, by connecting the tungsten wires 4 and 4 for arc extinguishing arranged approximately linearly to both power supply portions of the filament 5,
At least one of them is blown off, so that reliable shutoff can be performed.

Further, since the tungsten wire 4 is small in diameter and not too long, the size of the molten mass after melting is also small.
Even if the molten mass hits the valve 1, there is no risk of generating a crack due to thermal shock.

The mount 3 of the present invention has two support wires 3 in which a glass bead 30 is embedded in the sealing portion 11.
Since the filament 5 is supported by the internal lead wires 32 and 33 buried in the glass bead 30 while being supported by the glass beads 30, the structure has the same earthquake resistance and impact resistance as the conventional structure.

Although the mount is conventionally supported by one internal lead wire, the present invention is supported by two support wires 31 and 31 so that the same strength can be provided. Stable support can be performed with a thin wire. In addition, a wire having a small diameter has an advantage that the bulb 1 is well compatible with the glass of the bulb 1 and can be firmly fixed.

FIG. 2 shows a (halogen) bulb with reflector (RL) RL according to a second embodiment of the present invention, in which the same parts as those in FIG.

First, the inner bulb L2 is a halogen bulb of the same kind as that of the first embodiment. The mount 3 structure of the bulb L2 is composed of the inner lead wires 32 and 33 and the anchor 3.
One end of 9 is embedded and fixed in the crushed sealing portion 11 and is embedded and fixed in a glass bead 30 made of quartz glass at an intermediate portion extending into the bulb 1.

One end of the short internal lead wire 33 is embedded and fixed in the glass bead 30, and the other end of the long and short internal lead wires 32 and 33 is connected to the filament 5. At the position near the sealing portion 11 of the glass bead 30, thin metal wires 4 and 4 having an arc extinguishing action between the metal foils 2 and 2 are connected.

The mount 3 of this light bulb L2 is also
The internal lead wire 32 and anchor 3 embedded and fixed inside
9, a glass bead 30 is fixedly supported by the two columns, and the internal lead wire 3 fixed to the glass bead 30 is fixed.
Since the filaments 5 are connected to the mounts 2 and 33, the mount 3 has no problem in strength. When an arc is generated, the thin metal wires 4 and 4 have the same operation and effect as in the first embodiment.

In FIG. 2, reference numerals 34, 34 denote external leads, which are composed of three parts, a conductor 35, a fuse 36, and a conductor 37.

Further, in FIG. 2, reference numeral 8 denotes a reflecting mirror having a reflecting surface of a shape such as a paraboloid of revolution or a spheroid formed of hard glass, a heat-resistant synthetic resin or a metal body. Light / heat reflection film 8 made of silver, chrome, silver, etc.
1 or a visible light-reflecting infrared transmitting film 81 such as a dichroic film is formed, and a central base 82 has a through hole for accommodating the crushed sealing portion 11 of the bulb L2.
Then, a heat-resistant adhesive (not shown) such as a silicon-based material is injected in a state where the crushed sealing portion 11 of the electric bulb L2 is placed in the through hole, and the filament 5 is
When the focusing of the position is completed, this adhesive is solidified,
Both are integrated.

When the light bulb RL with a reflecting mirror shown in FIG. 2 is turned on, the halogen light bulb L2 has the same function as that of the above embodiment, and the light emitting characteristics are further improved because it is integrated with the reflecting mirror 8. did it. In addition, this bulb R with a reflecting mirror
In L, there is no risk of the bulb 1 of the bulb L2 exploding,
A cover member 83 such as a lens may be provided so as to cover the front opening of the reflecting mirror 8 for light control.

FIG. 3 shows a lighting fixture 9 according to a third embodiment of the present invention. In FIG. 3, reference numeral 91 denotes a base attached to a ceiling surface or the like; 92, a support pole; 93, a pole 9;
2, a universal joint rotatably attached to the distal end of the instrument 2, 94 is an instrument body provided with the universal joint, and 95 is a reflector provided in a front opening of the instrument body. A socket (not shown) is provided, and a lighting fixture 9 is configured by attaching a base of the halogen bulb L1 or L2 to the socket (not shown).

When the light bulb L1 attached to the lighting fixture 9 shown in FIG. 3 is turned on, the light bulb LL1 has the same operation as the above embodiment, and the light emission characteristics can be improved as well as the safety. In this lighting fixture 9, the bulb L1
There is no danger of the valve 1 rupture, but the device body 9
A cover member may be provided so as to cover the front opening of the fourth member.

[0065]

According to the first to fifth aspects of the present invention, an electric bulb with improved safety and quality, which can cut off the arc discharge generated in the bulb in a short time and can strengthen the mount for supporting the filament. Can be provided.

According to the invention of claim 6, the filament can be melted prior to the thin metal wire when the filament is broken, and the safety can be improved.

According to the seventh aspect of the present invention, the same effect as described in the first to sixth aspects can be obtained by applying the present invention to a halogen bulb having a visible light transmitting infrared reflecting film having a high temperature at the time of lighting and having high light emission characteristics. .

According to the eighth aspect of the present invention, since the bulb having the effects described in the first to seventh aspects is provided, it is possible to provide a reflector-equipped bulb with improved safety.

According to the ninth and tenth aspects of the present invention, since a light bulb having the effects described in the first to eighth aspects is provided, a lighting fixture with improved safety can be provided.

[Brief description of the drawings]

FIG. 1 is a front view of a halogen lamp showing a first embodiment of the present invention.

FIG. 2 is a partial cross-sectional front view of a halogen lamp with a reflector according to a second embodiment of the present invention.

FIG. 3 is a perspective view of a lighting fixture according to a third embodiment of the present invention.

[Explanation of symbols]

 L1, L2: bulb (halogen bulb) RL: bulb with reflector (halogen bulb with reflector) 1: bulb 11: sealing part 31: support wire 32, 33: internal lead wire 4: thin metal wire 5: filament 7: Base 8: Reflector 9: Lighting equipment

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme Court ゛ (Reference) // F21Y 101: 00 (72) Inventor Makoto Bessho 1 OSRAM, 1-1201 Funakoshi-cho, Yokosuka City, Kanagawa Prefecture Melco / Toshiba Lighting Co., Ltd. (72) Inventor Makoto Sakai 1-201, Funakoshi-cho, Yokosuka City, Kanagawa Prefecture 1 OSRAM Melco / Toshiba Lighting Co., Ltd. F term (reference) 3K014 AA01 JA02 3K042 AA01 AB03 AC02 AC07 BB03 BB05 BC01 CB29 CB30

Claims (10)

[Claims] 1. A glass bulb having a sealing portion formed at least at one end; a pair of sealing conductors hermetically sealed in the sealing portion; A pair of internal leads, a glass bead in which the pair of internal leads are embedded and fixed, and a coiled filament connected to the pair of internal leads;
A pair of fine metal wires having a diameter smaller than the internal lead wire, which is disposed apart from each other between the sealing portion and the glass bead and has one end connected to the sealing conductor and the other end connected to the internal lead wire. A light bulb comprising: an external lead wire connected to the other end of the sealing conductor and led out of the bulb; and a sealed gas sealed in the bulb. 2. A glass bulb having a sealing portion formed at least at one end; a pair of sealing conductors hermetically sealed in the sealing portion; A pair of support wires extending in the same direction; a glass bead in which the pair of support wires are embedded and fixed; and a pair of internal lead wires embedded in and fixed in the glass bead and extending in the opposite direction to the sealing portion. A coiled filament connected to the pair of internal lead wires; a coiled filament disposed apart from the sealing portion and the glass bead and having one end connected to the sealing conductor and the other end connected to the inside. A pair of thin metal wires smaller in diameter than the inner lead wire connected to the lead wire; an outer lead wire connected to the other end of the sealing conductor and led out of the valve; and a sealed gas sealed in the valve. And; And a light bulb characterized by the above. 3. A light bulb characterized in that the thin metal wire is made of a tungsten wire and has a current capacity 1.3 times or less than that of the filament. 4. The light bulb according to claim 1, wherein the wire diameter of the internal lead wire supporting the glass bead is 150% or more of the wire diameter of the thin metal wire. 5. The electric bulb according to claim 1, wherein the thin metal wire is buried in an end portion of the sealing portion via a conductive wire having a diameter larger than that of the thin metal wire. 6. The light bulb according to claim 1, wherein a fuse is connected in series to at least a part of the external lead wire portion. 7. The valve according to claim 1, wherein a halide and an inert gas are sealed in the bulb, and a visible light transmitting infrared reflecting film is formed on a surface of the bulb. A light bulb as described. 8. A reflector, and the light bulb according to claim 1 housed in a neck of the reflector;
A light bulb with a reflecting mirror, comprising: 9. An apparatus main body; a reflector disposed on the apparatus main body; and the light bulb according to claim 1 disposed optically opposite to the reflector. A lighting fixture characterized by the fact that: 10. A lighting apparatus comprising: an apparatus main body; and the light bulb with a reflecting mirror according to claim 9, which is disposed on the apparatus main body.