JP2001076505A - Lighting system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light source preventing the scattering of fragments even when a luminescence section is broken, cooled efficiently, and stabilized with high illuminance. SOLUTION: This lighting system is provided with a concave reflecting mirror 2 having a luminescence section 1a, a seal section 1b, a lamp, an opened aperture section, a light reflection section 2a reflecting the light of the lamp and radiating the parallel light, cutout sections 2c, 2d provided on the aperture section of the light reflection section 2a and communicating the inside and outside of the light reflection section 2a, and a tubular neck section inserted into the seal section 1b; a sleeve member 7 integrally forming a tubular reflection support section 7a supporting the neck section and a lamp base support section supporting a lamp base 9 fitted with the seal section 1b inserted into the neck section and having a plurality of notches communicating the inside and outside along the peripheral direction; a transparent shield plate 3 transmitting the parallel light; the support base of the concave reflecting mirror 2; and at least one cooling means provided on one side of the cutout sections 2c, 2d and the cutouts of the sleeve member 7 to cool the lamp.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lighting device using a lamp as a light source, and more particularly to a lighting device suitable for a backlight source of a liquid crystal projection device for enlarging and projecting a liquid crystal panel by light from the lamp (light source).

[0002]

2. Description of the Related Art In recent years, lighting apparatuses using a high-intensity discharge lamp (HID lamp) such as a metal halide lamp or a high-pressure mercury lamp as a light source have been widely used in accordance with a demand for energy saving. That is, in such a lighting device, by using a high-intensity discharge lamp,
Large light output is easily obtained compared to conventional fluorescent lamps,
It is possible to provide a light source that satisfies the above requirements. As a specific example to which this lighting device is applied, there is a lighting device used as a backlight light source of a liquid crystal projection device using a liquid crystal panel as a light valve. In the high-intensity discharge lamp described above, as is well known, the arc tube of the lamp has a high pressure (for example, 10 to 20 atm) during the lighting operation.
0 atm), which sometimes caused damage during the lighting operation.
Therefore, in the lighting device using such a lamp, there is a problem in that the broken pieces are prevented from scattering around. In particular, in the above-described lighting device used as a backlight light source, an optical unit such as a liquid crystal panel or a dichroic mirror is arranged close to the lighting device, so that broken pieces are prevented from scattering and damage to the optical unit due to the pieces. Is one of the important issues to avoid
Was one.

As a conventional illuminating device for solving the above-mentioned problem, there is a metal halide lamp disclosed in, for example, Japanese Patent Application Laid-Open No. H5-251054. This conventional lighting device will be specifically described with reference to FIG. FIG. 6 is a cross-sectional view illustrating a configuration of a conventional lighting device. In FIG. 6, a conventional lighting device includes a lamp 41 having a light emitting portion 41a, a reflecting mirror 42 for reflecting light from the lamp 41, and a front side of the reflecting mirror 42, the opening of which is provided. And a flat glass plate 43 for hermetic sealing. The light emitting portions 4 are provided at both ends of the light emitting portion 41a.
A sealing portion is provided which seals a metal foil (not shown) for supplying power to a pair of electrodes in 1a. As shown in the figure, one sealing portion is airtightly fixed to the neck of the reflecting mirror 42 by a cement 44, and the light emitting portion 4 of the lamp 41 is provided.
1a is disposed at a predetermined position in the reflecting mirror 42. The flat glass 43 is made of hard glass having a property of transmitting light from the light emitting section 41 a and the reflecting mirror 42, and is hermetically fixed to the reflecting mirror 42 by a low-melting glass material 45. As described above, in the conventional lighting device, the light emitting portion 41 a of the lamp 41 is arranged in the internal space of the reflecting mirror 42, and the internal space is sealed by the flat glass 43. In the conventional lighting device, when the light emitting portion 41a is damaged, the broken piece is prevented from scattering around by the flat glass 43 fixed to the front side of the reflecting mirror.

[0004]

In the above-mentioned conventional illuminating device, the light emitting portion of the lamp is arranged in the internal space of the reflecting mirror having a closed structure made of flat glass. Therefore, in the conventional lighting device, it is difficult to efficiently cool the light emitting portion of the lamp. As a result, in the conventional lighting device, the temperature of the light emitting portion of the lamp cannot be lowered and maintained at an appropriate temperature, and the light emitting characteristics of the lamp and the life of the lamp are reduced. Also,
In a liquid crystal projection device, in order to obtain a high-resolution and high-quality image, it is desired to increase the illuminance of a backlight light source. However, in order to obtain high illuminance of the light source, it is necessary to use a high-output lamp, that is, a lamp that becomes hotter when turned on, and a conventional illumination device uses a lamp that can cope with high illuminance in a liquid crystal projection device. It was difficult.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems. Even if a light emitting portion of a lamp is damaged, the fragments are prevented from scattering and the lamp is efficiently cooled. Accordingly, it is an object of the present invention to provide a lighting device capable of forming a light source having high illuminance and stable performance.

[0006]

A lighting device according to the present invention has a light emitting portion and at least one sealing portion, a lamp for forming a light source, an open wide opening, and the light of the lamp. A light reflecting portion for reflecting substantially parallel light by reflecting light, at least one notch provided in a wide-open portion of the light reflecting portion and communicating the inside and outside of the light reflecting portion,
A concave reflecting mirror provided at a central bottom portion of the light reflecting portion and having a cylindrical neck portion in which the sealing portion is inserted with a predetermined gap, and a cylindrical reflecting portion for supporting the neck portion A mirror support portion and a lamp base support portion for supporting a lamp base mounted with a sealing portion inserted into a neck portion thereof are integrally formed to communicate the inside and the outside of the reflector support portion. A sleeve member provided with a plurality of cutouts along the circumferential direction of the reflector support portion, a transparent shield plate fixed to the front surface of the concave reflector and transmitting the parallel light, and supporting the concave reflector. And at least one cooling means for cooling the lamp is provided on at least one of the notch of the concave reflecting mirror and the notch of the sleeve member. With this configuration, even if the light emitting portion of the lamp is damaged, it is possible to prevent the fragments from being scattered and efficiently cool the lamp to form a light source with high illuminance and stable performance. Can be.

According to another aspect of the present invention, there is provided a lighting device according to the above-described aspect, wherein the support base is provided at a right angle to the base and the base, and the mounting part for mounting the light reflecting part is provided. And a notch portion communicating with the at least one notch portion is provided in the attachment portion. With this configuration, even when the light emitting portion of the lamp is damaged, the fragments can be prevented from being scattered, and the lamp can be efficiently cooled to form a light source having high illuminance.

According to another aspect of the present invention, in addition to the above-mentioned invention, a mesh cover is provided on the concave reflecting mirror or the support base to cover the at least one notch. I have. With this configuration, even when the light-emitting portion of the lamp is broken, the fragments can be prevented from scattering around, and the lamp can be efficiently cooled to form a light source having high illuminance. .

According to another aspect of the present invention, in addition to the above-described lighting apparatus, the above-mentioned supporting base is detachably attached to the lighting apparatus, and further has a lamp case cover for forming a housing. A notch hole communicating with the outside is provided in the lamp case cover. With this configuration, even when the light-emitting portion of the lamp is broken, the fragments can be prevented from scattering around, and the lamp can be efficiently cooled to form a light source having high illuminance. .

According to another aspect of the present invention, in addition to the above-mentioned invention, a notch of the support, a notch of the concave reflecting mirror, an internal space of the light reflecting portion, and a neck are sealed. The air passage is formed by a gap between the cooling unit, the cutout of the sleeve member, and the cutout hole of the lamp case cover, and the intake side of the cooling means is arranged close to the cutout hole. . With this configuration, even when the light-emitting portion of the lamp is broken, the fragments can be prevented from scattering around, and the lamp can be efficiently cooled to form a light source having high illuminance. .

According to another aspect of the present invention, in addition to the above-described invention, a lighting device is provided through a cutout portion of the support base.
A second cooling unit is provided for sending cooling air for directly cooling the light emitting portion of the lamp. With this configuration, even if the light emitting portion of the lamp is damaged,
The fragments can be prevented from flying around and the lamp can be efficiently cooled to form a light source having high illuminance.

According to another aspect of the present invention, there is provided a lighting device according to the above-described aspect, wherein the flow of the cooling air of the second cooling means is changed so that the temperature of the cooling air reaches the highest point of the light emitting portion. An inclined portion for flowing toward the portion is provided on the support base. With this configuration, even when the light-emitting portion of the lamp is broken, the fragments can be prevented from scattering around, and the lamp can be efficiently cooled to form a light source having high illuminance. . Further, the temperature difference between the light emitting portions can be reduced, and the lamp can be prevented from being deformed even when the lamp is lit for a long time, so that the light emitting characteristics of the lamp and the life of the lamp can be improved.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings.
In the following description, an example in which the lighting device of the present invention is used as a backlight light source of a liquid crystal projection device will be described.

Embodiment 1 FIG. 1 is a sectional view showing a configuration of a lighting apparatus according to Embodiment 1 of the present invention, and FIG. 2 is a perspective view showing a configuration of a main part of the lighting apparatus shown in FIG. is there. FIG.
As shown in FIG. 2 and FIG. 2, a lighting device according to the present embodiment includes a lamp 1 for constituting a light source, and a lamp for reflecting light from the lamp 1 and emitting substantially parallel light in a predetermined direction. The apparatus includes a concave reflecting mirror 2, a transparent shield plate 3 fixed to a front surface of the concave reflecting mirror 2 and transmitting the parallel light, and a support 4 for supporting the concave reflecting mirror 2. The lamp 1 is preferably formed of an ultra-high pressure mercury lamp, and includes a light emitting portion 1a and sealing portions 1b formed at both ends thereof. The light emitting portion 1a and the sealing portion 1b are sealing bodies formed of glass or ceramic, and a pair of electrodes, mercury, argon gas for starting, and a small amount of halogen gas are sealed in the light emitting portion 1a. Further, a metal foil (for example, a molybdenum foil) for supplying a predetermined power from the outside to the pair of electrodes is sealed in the sealing portion 1b. A cylindrical lamp base 9 made of, for example, stainless steel is mounted on one sealing portion 1b.

The concave reflecting mirror 2 is made of glass or ceramic and has, for example, a light reflecting portion 2a formed in a paraboloid of revolution. This light reflecting portion 2a
A dielectric multilayer film for selecting and reflecting only visible light is laminated on the surface on the inner surface (lamp 1) side. A cylindrical neck 2b extending in the axial direction of the concave reflecting mirror 2 is provided at the central bottom of the light reflecting portion 2a. One sealing portion 1b of the lamp 1 is inserted into the cylindrical hole of the neck 2b with a predetermined gap along the above-described axial direction so as to protrude from an end of the neck 2b. . That is, the neck 2b is formed such that its inner diameter is larger by a predetermined dimension (for example, 4 mm) than the outer diameter of the sealing portion 1b. Thereby, the gap between the outer peripheral surface of the sealing portion 1b and the inner peripheral surface of the cylindrical hole of the neck portion 2b functions as an air passage for flowing air from the internal space of the light reflecting portion 2a to the outside. Further, the light reflecting portion 2a can be efficiently cooled (details will be described later). On the front side of the light reflecting portion 2a, for example, a wide opening which is opened in a circular shape is provided, and on the front side thereof, a transparent shield plate 3 is provided so as to seal the wide opening. The transparent shield plate 3 is made of, for example, impact-resistant glass, and is fixed to the opening end (front surface) of the concave reflecting mirror 2 with a silicone adhesive. Even if the lamp 1 is damaged, fragments thereof scatter to the front surface. Can be prevented. The transparent shield plate 3 may be made of a heat-resistant plastic plate such as an acrylic resin. At least one notch for communicating the inside and the outside of the light reflecting portion 2a is provided in the wide opening of the light reflecting portion 2a to introduce air (cooling air) from the outside. Specifically, as shown in FIG. 1, two notches 2c and 2d
Is provided. These notches 2c, 2d
The light reflecting portion 2a is formed by cutting out the light reflecting portion 2a from the end of the wide mouth toward the neck 2b.

The sleeve member 7 is preferably made of a heat-resistant insulating material, for example, ceramic, and has a concave reflecting mirror 2.
And a cylindrical lamp base supporting portion 7b for supporting the lamp base 9 and a cylindrical reflecting mirror supporting portion 7a for supporting the neck portion 2b. The reflector supporting portion 7a has an inner diameter that is equal to or larger than the outer diameter of the neck portion 2b of the concave reflecting mirror 2, and is made of an inorganic adhesive material 8, preferably silica-alumina.
And are fixed to each other. Similarly, the lamp base support 7 b has an inner diameter larger than the outer diameter of the lamp base 9, and is fixed to the lamp base 9 by the inorganic adhesive 8. When the neck 2b and the lamp base 9 are fixed to the reflector supporting part 7a and the lamp base supporting part 7b, respectively, the light emitting part 1a of the lamp 1 has the concave reflecting mirror 2 so as to obtain an optimal illuminance balance with the light reflecting part 2a. It is arranged at a predetermined position in the inside and positioned. As a result, light from the light emitting unit 1a is efficiently reflected by the light reflecting unit 2a, and reflected light having no illuminance unevenness is applied to the irradiation target. Reflector support 7a
Are provided with a plurality of, for example, two notches 7c and 7d along the circumferential direction of the reflector support 7a. These notches 7c and 7d communicate with a predetermined gap between the sealing portion 1b and the neck portion 2b, and discharge cooling air that has cooled the lamp 1 and the light reflecting portion 2a.

The support base 4 is integrally formed of, for example, a synthetic resin, and is provided with a base portion 4a constituting a power supply connection portion of the lighting device and a front surface side of the lighting device. And a mounting portion 4b having notches 4c, 4d provided at positions corresponding to the notches 2c, 2d, respectively. The mounting portion 4b is formed at right angles to the base portion 4a, and the front portion thereof corresponds to the shape of the wide opening of the light reflecting portion 2a so as not to block light from the lamp 1 and the light reflecting portion 2a. It has a frame structure with an opening. The notches 4c and 4d are
Notch portions 2c and 2d of concave reflector 2 adjacent to each other
And air (cooling air) is introduced from the outside into the internal space of the light reflecting portion 2a. These notches 4c, 4d
, Preferably, metal mesh covers 5a, 5b are attached so as to completely cover each. With the mesh covers 5a and 5b and the transparent shield plate 3, in the lighting device of the present embodiment, even if the lamp 1 is damaged, the fragments can be completely prevented from scattering around the concave reflecting mirror 2. As shown in FIG. 2, a hook portion for hooking a spring 6 for contacting and fixing the outer surface of the light reflecting portion 2a is formed in the mounting portion 4b.

As shown in FIG. 1, the lighting apparatus of the present embodiment has a lamp case cover 10 to which a support 4 is detachably attached and which constitutes a housing. The lamp case cover 10 is provided with a plurality of notches 10a for communicating the inside and the outside of the housing. In the vicinity of the lamp case cover 10, the cooling fan 11 has a suction-side portion thereof and the above-described cutout hole 10 a arranged close to each other, and the cutout hole 10 a extends from the inside of the housing to the outside.
The air is forcibly and efficiently exhausted through the air. Thus, in the lighting device of the present embodiment, the cooling air (hot air) that has cooled the lamp 1 and the light reflecting portion 2a can be exhausted to the outside of the housing, and the lamp 1 and the light reflecting portion 2a can be efficiently cooled. Can be. When the illumination device of this embodiment is used for a light source device of a liquid crystal projection device, an optical block (unit) 30 is provided on the front side of the above-described housing as shown in FIG. The optical block 30 is a housing including components necessary for the liquid crystal projection device. The optical block 30 is fixed to the lamp case cover 10 so as to be integrated with the light source block (unit) of the lighting device configured in the housing. I have. Specific components included in the optical block 30 include a magnifying lens for magnifying and projecting, a dichroic mirror for color separation and color synthesis of light from the light source block, and a liquid crystal functioning as a light valve. Panels are included.

With the above arrangement, in the lighting device of the present embodiment, the notches 4c, 4d of the mounting portion 4b of the support 4 for fixing and supporting the concave reflecting mirror 2 are moved to the notches 2c, 2c of the concave reflecting mirror 2. 2d, inner space of light reflection part 2a, neck 2b
An air passage that passes through the gap between the sealing member 1b and the notches 7c and 7d of the sleeve member 7 and the notch hole 10a of the lamp case cover 10 can be formed. further,
In the lighting device of the present embodiment, the cooling fan 11 is provided on the downstream side of the air passage, and the air (cooling air) flowing in the air passage is forcedly and efficiently flown by the rotation of the cooling fan 11. . Thereby, in the lighting device of the present embodiment, as shown by the arrow in FIG.
Light reflecting portion 2a and the lamp 1
Can be efficiently cooled. Furthermore, the cooling air that has cooled the light reflecting portion 2a and the lamp 1 can be exhausted from the internal space of the concave reflecting mirror 2 to the outside. As a result, in the lighting device of the present embodiment, even when a high-power lamp is used, the lamp is efficiently cooled and has a high illuminance without causing a decrease in the light emission characteristics of the lamp and a decrease in the life of the lamp. A light source can be configured. Therefore, in the illumination device of the present embodiment, for example, an illumination device corresponding to high illuminance of a backlight light source in a liquid crystal projection device can be provided.

In the lighting device of the present embodiment, a transparent shield plate 3 is provided so as to cover the front side of the concave reflecting mirror 2.
Further, the mesh covers 5a,
5b are attached. Thus, in the lighting device of the present embodiment, the internal space of the light reflecting portion 2a can be substantially closed, and even if the light emitting portion 1a of the lamp 1 is damaged, the fragments are scattered around. Can be prevented. Therefore, even when the lighting apparatus of the present embodiment is used as the above-described backlight light source, it is possible to prevent fragments from entering the optical block 30 and damage members such as a dichroic mirror built in the optical block 30. Can be prevented.

According to experiments conducted by the inventors, the case where the rear of the reflecting mirror 42 of the conventional lighting device shown in FIG. 6 is directly cooled by a cooling fan and the case where the lighting device of the present invention is In the case where the liquid crystal projection apparatus was cooled by being integrally attached to the liquid crystal display device, almost the same temperature (1050 ° C.) was measured as the surface temperature of the light emitting portion 1a, and almost the same cooling performance was obtained. It was confirmed. In this experiment, a mesh cover 5a, 5b having an opening ratio of 50% was used for a lamp having an output of 200 W, and 45 notch holes 10a having an opening area of 34 mm ² were provided in the lamp case cover 10 to cool the lamp. Air was flown by the fan 11 at an air volume of 1.2 m ³ per minute.

In addition to the above description, a configuration may be adopted in which a cooling (blowing) fan is provided on the upstream side of the air passage to blow a predetermined amount of air into the air passage. Notches 7c, 7 of portions 2c, 2d and sleeve member 7
At least one cooling means for blowing the air or exhausting the air to cool the lamp 1 on at least one side of d may be used. Also, the configuration in which the notches 4c and 4d are respectively covered by the mesh covers 5a and 5b has been described, but the embodiment is not limited to this, and the broken pieces of the lamp 1 do not scatter to the front side of the lighting device. Any configuration may be used. For example, a concave reflecting mirror 2 may be provided so that the mesh cover covers the cutouts 2c and 2d.
It may be configured to be attached to. In addition, the configuration in which the notch portions 2c and 2d of the concave reflecting mirror 2 and the notch portions 4c and 4d of the support base 4 are provided at corresponding positions has been described, but air is introduced into the internal space of the light reflecting portion 2a. Any configuration may be used as long as the concave reflecting mirror has at least one cutout communicating with the outside. Light emitting unit 1
Although the configuration using the lamp 1 having the sealing portions 1b at both ends of “a” has been described, a lamp having a sealing portion only at one end of the light emitting portion may be used.

Embodiment 2 FIG. 4 is a sectional view showing a configuration of a lighting apparatus according to Embodiment 2 of the present invention. In this embodiment, in the configuration of the lighting device, a configuration is adopted in which cooling air is efficiently blown to the light emitting portion where the temperature is the highest.
The other parts are the same as those of the first embodiment, and the duplicate description thereof will be omitted. In FIG. 4, in the lighting device of the present embodiment, preferably, a sirocco fan is used, and a second cooling fan 12 for sending cooling air to the above-described air passage portion, and a second cooling fan 12 from the second cooling fan 12 are provided. A duct 13 is provided for efficiently introducing cooling air into the internal space of the concave reflecting mirror 2 '. The second cooling fan 12 and the duct 13 are attached to the lower surface of the optical block 30. In the lighting device of the present embodiment, the cooling air from the second cooling fan 12 is used to efficiently cool the light emitting unit 1a and the light reflecting unit 2a '.
Only the lower notches 2d 'and 4d' communicating with the duct 13 are provided in the light reflecting portion 2a 'and the mounting portion 4b', respectively. The upper portions of them have a closed structure without providing notches. Further, in the lighting device of the present embodiment, a portion of the light emitting portion 1a of the lamp 1 which has the highest temperature at the time of lighting operation, that is, the upper portion of the light emitting portion 1a above the installation surface of the lighting device, is provided from the duct 13. The air passage is configured to blow the cooling air efficiently.

Specifically, as shown in FIG. 4, in the lighting device of the present embodiment, the inclined portion 4e 'is provided with the notch 2d' of the light reflecting portion 2a 'and the notch 4d' connected to the duct 13.
And is located between. The inclined portion 4e 'is for controlling the flow of the cooling air from the second cooling fan 12 so as to flow the cooling air toward the upper portion of the light emitting portion 1a. 4a 'or mounting part 4
b '. Thereby, in the lighting device of the present embodiment, as shown by the arrow in FIG.
The cooling air from the cooling fan 12 can be made to flow upward from the lower part of the light emitting part 1a and blow to the upper part of the light emitting part 1a. As a result, in the lighting device of the present embodiment, the highest point temperature of the lamp 1 at the upper portion can be significantly reduced without lowering the coldest point temperature of the lamp 1 at the lower portion of the light emitting portion 1a. It is possible to further reduce the temperature difference between the parts. Therefore, in the lighting device of the present embodiment, the deformation of the lamp 1 can be suppressed even when the lamp is lit for a long time, and the light emission characteristics of the lamp 1 and the life of the lamp 1 can be improved as compared with the lighting device of the first embodiment. it can.

[0025]

As described above, in the lighting device of the present invention,
An air passage can be formed from the notch of the support base that fixes and supports the concave reflecting mirror through the notch hole of the lamp case cover through the internal space of the light reflecting part. Further, in the lighting device of the present invention, a cooling means is provided on the upstream or downstream side of the above-mentioned air passage, and the air (cooling air) flowing in the air passage is forcedly and efficiently flown by the cooling means. ing. Thus, in the lighting device of the present invention, air from the outside can be introduced into the internal space of the light reflecting portion, and the light reflecting portion and the lamp can be efficiently cooled. further,
The cooling air that has cooled the light reflecting portion and the lamp can be exhausted from the internal space of the light reflecting portion to the outside. As a result, in the lighting device of the present invention, even when a high-power lamp is used, the lamp can be efficiently cooled, and a stable light source having a high illuminance can be obtained without lowering the luminous characteristics of the lamp and the life of the lamp. The light source having the performance described above can be configured. Therefore, in the lighting device of the present invention, for example, a lighting device corresponding to high illuminance of a backlight light source in a liquid crystal projection device can be provided.

Further, in the lighting device of another invention, in addition to the above-mentioned invention, a transparent shield plate is provided so as to cover the front side of the concave reflecting mirror, and a mesh cover is attached to the notch. I have. Thus, in the lighting device of the present invention, the internal space of the light reflecting portion can be substantially closed, and even if the light emitting portion of the lamp is damaged, the fragments are prevented from scattering around. Can be.
Therefore, even when the lighting device of the present invention is used for the above-described backlight light source, debris is prevented from entering the optical block disposed in front of the backlight light source,
Damage to members such as a dichroic mirror built in the optical block can be prevented. Also,
In the lighting device of another invention, in addition to the above-mentioned invention,
An inclined portion is provided on the support for allowing the cooling air to flow toward the portion where the highest temperature of the light emitting portion is reached. Thereby, in the lighting device of the present invention, it is possible to reduce the temperature difference due to the portion of the light emitting section as compared with the lighting device of the present invention, to prevent the lamp from being deformed even when it is lit for a long time, The life of the lamp can be improved.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a configuration of a lighting device according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing a configuration of a main part of the lighting device shown in FIG. 1;

FIG. 3 is an explanatory diagram showing a flow of air in the lighting device shown in FIG. 1;

FIG. 4 is a cross-sectional view illustrating a configuration of a lighting device according to a second embodiment of the present invention.

FIG. 5 is an explanatory diagram showing a flow of air in the lighting device shown in FIG. 4;

FIG. 6 is a cross-sectional view illustrating a configuration of a conventional lighting device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lamp 1a Light emitting part 1b Sealing part 2, 2 'Concave reflecting mirror 2a, 2a' Light reflecting part 2b, 2b 'Neck part 2c, 2d, 2d' Notch part 3 Transparent shield plate 4, 4 'Support base 4a, 4a 'Base 4b, 4b' Attachment 4c, 4d, 4d 'Cutout 4e' Inclined 5a, 5b Mesh Cover 7 Sleeve 7a Reflector Support 7b Lamp Base Support 7c, 7d Cutout 9 Lamp Base 10 Lamp case cover 10a Notch hole 11 Cooling fan 12 Second cooling fan 13 Duct

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G02F 1/13357 G02F 1/1335 530 G03B 21/16 // F21W 131: 30 F21Y 101: 00

Claims (7)

[Claims] 1. A lamp having a light-emitting portion and at least one sealing portion, a lamp for constituting a light source, and an open wide-open portion, which reflects substantially parallel light by reflecting light from the lamp. A light reflecting portion for irradiating, provided at a wide opening of the light reflecting portion, at least one notch communicating the inside and outside of the light reflecting portion, and provided at a central bottom portion of the light reflecting portion; A concave reflecting mirror having a cylindrical neck portion in which the sealing portion is inserted with a predetermined gap; a cylindrical reflecting mirror support portion for supporting the neck portion; and a cylindrical reflecting mirror inserted into the neck portion. A lamp base supporting portion for supporting the lamp base with the sealing portion is integrally formed, and a plurality of cutouts communicating the inside and the outside of the reflecting mirror supporting portion are formed around the reflecting mirror supporting portion. A sleeve member provided along a direction, fixed to a front surface of the concave reflecting mirror, A transparent shield plate that transmits parallel light, a support for supporting the concave reflecting mirror, and a cutout of the concave reflecting mirror and a cutout of the sleeve member are provided on at least one side of the cutout, and the lamp is provided on the cutout. A lighting device, comprising: at least one cooling means for cooling. 2. The notch portion, wherein the support base includes a base portion, and a mounting portion provided at a right angle to the base portion for mounting the light reflection portion, and the notch portion communicates with the at least one notch portion. The lighting device according to claim 1, wherein the lighting device is provided on the mounting portion. 3. The structure according to claim 1, wherein a mesh cover is provided on the concave reflecting mirror or the support base so as to cover the at least one notch.
The lighting device according to claim 1. 4. The support base is detachably attached,
The lamp case cover according to any one of claims 1 to 3, further comprising a lamp case cover for forming a housing, wherein a cutout hole communicating between the inside and the outside of the housing is provided in the lamp case cover. Lighting equipment. 5. The notch of the support base, the notch of the concave reflecting mirror, the internal space of the light reflecting part, the gap between the neck and the sealing part, the notch of the sleeve member, and the lamp case cover. The lighting device according to claim 4, wherein an air path is formed by the notch holes, and an intake side of the cooling unit is arranged close to the notch holes. 6. The apparatus according to claim 2, further comprising a second cooling unit configured to blow cooling air for directly cooling the light emitting unit of the lamp through the cutout of the support base. 5. The lighting device according to any one of 5. 7. An inclined portion for changing the flow of the cooling air of the second cooling means and flowing the cooling air toward a portion having the highest point temperature of the light emitting section is provided on the support base. The lighting device according to claim 6, wherein: