JP2000156111A - High pressure discharge lamp device and lighting device - Google Patents

Abstract

(57) [Problem] To provide a high-pressure discharge lamp device that can be reduced in size, and furthermore can reduce the influence of heat to stabilize the lighting state and extend the life. SOLUTION: Holders 3a, 3b of a high-pressure discharge lamp 1 are inserted into mounting holes 15a, 15b formed in a reflection mirror 7, and ends of the holders 3a, 3b protrude toward the back side of the reflection mirror 7. Thus, the size of the reflection mirror 7 is significantly reduced as compared with the case where the entire high pressure discharge lamp 1 including the holding portions 3a and 3b is surrounded, and the high pressure discharge lamp device can be downsized without changing the size of the high pressure discharge lamp 1. Be transformed into Part of the heat generated from the electrodes of the high-pressure discharge lamp 1
a, 3b, and is radiated to the back side of the reflection mirror 7,
Temperature rise in a space surrounded by the reflection surface 9 of the reflection mirror 7 and the translucent cover 14 is suppressed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-pressure discharge lamp device and a lighting device using the high-pressure discharge lamp device.

[0002]

2. Description of the Related Art In recent years, a high-pressure discharge lamp device in which a high-pressure discharge lamp and a reflecting mirror are integrated and the illuminance is increased by arranging the high-pressure discharge lamp in parallel with the opening surface of the reflecting mirror has become widespread. . In such a high-pressure discharge lamp device, the luminous efficiency of the high-pressure discharge lamp is high, and power consumption can be reduced as compared with a lamp device using a halogen lamp or a fluorescent lamp.

[0003] The high-pressure discharge lamp comprises a hollow elliptical spherical discharge vessel portion having electrodes disposed opposite to each other, and holding portions formed at opposite longitudinal ends of the discharge vessel portion and extending in opposite directions. Having. A pair of electrodes are arranged in the discharge vessel to face each other, and an external power supply is held in the holding section. One end of the external power supply is connected to the electrode, the other end of the external electrode supply protrudes outward from the other end of the holding unit, and an external lead wire is connected to this protruding portion.

[0004]

The high-pressure discharge lamp has a large amount of heat radiation from the electrodes. In order to prevent the connection between the external power supply and the external lead wires from being affected by heat, the high-pressure discharge lamp must be connected to the external electrodes from the electrodes. It is necessary to ensure the distance from the power supply to the connection between the external lead wire and the external lead wire is 5 to 10 times the distance between the electrodes.
For this reason, in the high-pressure discharge lamp, the dimension between the other ends of the pair of external power supplies is large.

Therefore, if the entire high pressure discharge lamp including the holding portion is surrounded by the reflection mirror, the size of the reflection mirror becomes large, and it is difficult to reduce the size of the high pressure discharge lamp device.

Further, when the opening of the reflection mirror is closed by a light-transmitting cover, the space surrounded by the reflection mirror and the light-transmitting cover becomes hot. And, by arranging the high-pressure discharge lamp in this high temperature space,
The lighting condition of the high-pressure discharge lamp becomes unstable due to the influence of heat, and the life is shortened.

Accordingly, an object of the present invention is to provide a high-pressure discharge lamp device which can be downsized and a lighting device using the high-pressure discharge lamp device.

Another object of the present invention is to provide a high-pressure discharge lamp device which can easily mount a high-pressure discharge lamp on a reflection mirror, and an illumination device using the high-pressure discharge lamp device.

Further, the present invention reduces the influence of heat,
It is an object of the present invention to provide a high-pressure discharge lamp device capable of stabilizing the lighting state and extending the life thereof, and an illumination device using the high-pressure discharge lamp device.

[0010]

According to a first aspect of the present invention, there is provided a high-pressure discharge lamp apparatus comprising: a discharge vessel in which a discharge medium is sealed and a pair of electrodes arranged opposite to each other; A high voltage having a holding portion extending in opposite directions and an external power supply body held in the holding portion and having one end connected to the electrode and the other end projecting outward from the end of the holding portion. A discharge lamp; a reflecting mirror having a concave reflecting surface and an opening located at an end of the reflecting surface formed on the front side; and an opening of the opening formed in the reflecting mirror and opposed to the reflecting surface. Two mounting holes into which the holding portion of the high-pressure discharge lamp arranged parallel to the surface is inserted and whose ends protrude toward the back side of the reflection mirror; and the mounting hole into which the holding portion is inserted. A sealed sealing member; so as to close the opening Comprising a; the and the translucent cover is attached to the reflecting mirror.

The discharge vessel portion and the holding portion are made of a material having a light-transmitting property and heat resistance, for example, a light-transmitting ceramic or quartz glass.

A rare gas such as xenon or argon, a metal halide, mercury, or the like is used as a discharge medium sealed in the discharge vessel.

One end of the external power supply is connected to the electrode, and the other end protruding outward from the end of the holding portion is connected to a power supply via an external lead wire or the like, and applies a voltage between the electrodes.

The external power supply and the electrode may be formed separately and fixed, or may be formed integrally.

The fact that the high-pressure discharge lamp is arranged in parallel with the opening surface of the opening of the reflecting mirror means that the straight line connecting the pair of electrodes and the opening surface of the opening are parallel.

By inserting the holding portion of the high-pressure discharge lamp into a mounting hole formed in the reflection mirror and sealing the mounting hole with a sealing member, the high-pressure discharge lamp is held in a fixed position by the reflection mirror. As the sealing member, cement or the like is used.

Therefore, the holding portion of the high-pressure discharge lamp is inserted into the mounting hole formed in the reflection mirror, and the end of the holding portion protrudes toward the back side of the reflection mirror, so that the reflection mirror is connected to the high-pressure discharge lamp including the holding portion. Is greatly reduced as compared with the case where the whole is surrounded.

Further, a part of the heat generated in the electrode is transmitted to the holding portion and is radiated to the back side of the reflection mirror, so that a temperature rise in a space surrounded by the reflection surface of the reflection mirror and the light transmitting cover is suppressed. Can be

According to a second aspect of the present invention, there is provided a high-pressure discharge lamp device comprising: a discharge vessel portion in which a discharge medium is sealed and a pair of electrodes arranged opposite to each other; and formed at both ends of the discharge vessel portion and extending in opposite directions. A high-pressure discharge lamp having an extended holding portion, an external power supply held in the holding portion and having one end connected to the electrode and the other end protruding outward from the end of the holding portion; A reflection mirror formed on the front side with a reflection surface and an opening located at an end of the reflection surface; formed on the reflection mirror, disposed opposite to the reflection surface and parallel to the opening surface of the opening. Two mounting holes into which the holding portion of the high-pressure discharge lamp is inserted and whose ends project from the rear surface of the reflection mirror; and a light-transmitting light mounted on the reflection mirror so as to close the opening. A reflective cover; Is a first reflecting mirror and a second reflecting mirror divided into two by a plane parallel to the opening surface of the opening, and a joining surface where the first reflecting mirror and the second reflecting mirror are joined. A concave portion serving as the mounting hole is formed in at least one of the above.

Therefore, when the high-pressure discharge lamp is mounted on the reflection mirror, the first reflection mirror and the second reflection mirror are separated from each other, the holding portion of the high-pressure discharge lamp is inserted into the recess, and the connection surface of the first reflection mirror and This is performed by bonding and fixing the bonding surface of the second reflection mirror. Therefore, the work of attaching the high-pressure discharge lamp to the reflection mirror can be easily performed.

According to a third aspect of the present invention, in the high-pressure discharge lamp device according to the first or second aspect, the other end of the external power supply protruding from an end of the holding portion is a projection surface of an outer peripheral edge of the opening. And a protective case that covers the other end of the external power supply is provided on the back side of the reflection mirror.

The projection surface of the outer peripheral edge of the opening means a projection surface when the outer peripheral edge of the opening is projected from a direction orthogonal to the opening surface.

Therefore, the outer dimensions of the protective case can be suppressed to substantially the same as the outer peripheral diameter of the opening of the reflection mirror.

Further, an external lead wire or the like is connected to the other end of the external power supply, and the connection is securely protected by the protective case.

According to a fourth aspect of the present invention, in the high pressure discharge lamp device according to the first, second or third aspect, the reflection mirror is formed of an insulator.

Therefore, generation of leakage current from a contact portion between the holding portion and the reflecting mirror is prevented, a sufficient voltage necessary for lighting the high-pressure discharge lamp is secured, and the lighting state is stabilized.

According to a fifth aspect of the present invention, in the high-pressure discharge lamp device according to the first, third or fourth aspect, the one of the mounting holes allows the holding portion to be inserted therein and is slightly smaller than the outer dimensions of the holding portion. The other mounting hole is formed to have a hole diameter through which the discharge vessel portion can be inserted and slightly larger than an outer dimension of the discharge container portion.

The outer dimensions of the discharge vessel means the dimensions of the discharge vessel in the direction perpendicular to the insertion direction when the discharge vessel is inserted into the mounting hole.

Accordingly, one of the two mounting holes formed in the reflection mirror is formed to have a small diameter and the other is formed to have a large diameter, and is formed to have a minimum diameter necessary for mounting a high-pressure discharge lamp. When mounting the high-pressure discharge lamp on the reflecting mirror, insert the high-pressure discharge lamp from one holding part side of the high-pressure discharge lamp through the large-diameter mounting hole, pass the discharge vessel part through the large-diameter mounting hole, and then attach one of the holding parts. It is inserted into the other small-diameter mounting hole, and the other holding portion is positioned in the large-diameter mounting hole. Then, after each of the two holding portions is positioned in the mounting hole, these mounting holes are sealed with a sealing member. Since the hole diameter of the two mounting holes is formed to the minimum required for mounting the high-pressure discharge lamp, the sealing member exposed on the reflection surface when the mounting hole is sealed with the sealing member. Is minimized, and the reflection performance of the reflection mirror is slightly reduced due to the exposure of the sealing member on the reflection surface.

According to a sixth aspect of the present invention, in the high pressure discharge lamp device according to the first, third or fourth aspect, the edge of the two mounting holes on the same side in a direction orthogonal to the opening is provided.
It is located on a straight line parallel to the opening surface of the opening.

Therefore, when the mounting hole into which the holding portion is inserted is sealed with the sealing member, the outer peripheral surface of the holding portion is pressed against the same side edge of the two mounting holes, so that the high-pressure discharge lamp can be used. , Are positioned parallel to the opening surface of the opening of the reflection mirror. Thereby, the light distribution performance by the reflection mirror is improved.

The invention according to claim 7 is based on claims 1, 2, and
7. The high-pressure discharge lamp device according to 3, 5, or 6, wherein an insulating film is coated on at least a portion of the reflection mirror that is in contact with the holding portion.

Therefore, the occurrence of leakage current from the contact portion between the holding portion and the reflection mirror is prevented, the voltage necessary for lighting the high-pressure discharge lamp is sufficiently secured, and the lighting state is stabilized.

[0034] An illumination device according to an eighth aspect of the present invention includes a high-pressure discharge lamp device according to any one of the first to seventh aspects;
A storage case mounted on the back side of the reflection mirror; a lighting circuit stored in the storage case and connected to the high-pressure discharge lamp; a lighting circuit mounted on an outer peripheral portion of the storage case and connected to the lighting circuit. And a base.

Therefore, in this lighting device, the lighting circuit is arranged near the high-pressure discharge lamp device, and the size is reduced. In addition, this lighting device can be used simply by attaching it to an existing lamp socket or the like to which power from a power supply is supplied, and the versatility is enhanced.

According to a ninth aspect of the present invention, in the lighting device of the eighth aspect, an infrared reflecting layer is formed on the reflecting mirror.

Therefore, the infrared ray emitted from the high-pressure discharge lamp is prevented from passing through the reflecting mirror and reaching the lighting circuit by the infrared reflecting layer. For this reason, even if the lighting device is downsized and the high-pressure discharge lamp and the lighting circuit are arranged close to each other, the lighting circuit is protected from heat.

[0038]

FIG. 1 shows a first embodiment of the present invention.
A description will be given with reference to FIG. FIG. 1 is a vertical sectional front view showing a high-pressure discharge lamp device. FIG. 2 is an enlarged front view showing the high-pressure discharge lamp. FIG. 3 is a vertical sectional front view showing a mounting position of the high-pressure discharge lamp on the reflection mirror.
FIG. 4 is a vertical sectional front view showing an illumination device using the high-pressure discharge lamp device. FIG. 5 is a longitudinal sectional front view showing a modification of the mounting position of the high-pressure discharge lamp on the reflection mirror.

First, the high-pressure discharge lamp 1 will be described. As shown in FIG. 2, the high-pressure discharge lamp 1 includes a discharge vessel portion 2, a pair of holding portions 3a and 3b, and a pair of electrodes 4a and 4b.
4b, external power supply bodies 5a and 5b, and a seal 6. A discharge medium is sealed in the discharge vessel part 2, and the electrodes 4a and 4b are opposed to each other at a predetermined interval.

The discharge vessel section 2 and the holding sections 3a and 3b are made of translucent ceramics. The discharge vessel part 2 is formed in a hollow elliptical spherical shape, and cylindrical holding parts 3a and 3b extend from opposite ends in the longitudinal direction in opposite directions. External power supply members 5a, 5b are inserted into the holding portions 3a, 3b, and electrodes 4a, 4b are integrally formed at one end of the external power supply members 5a, 5b protruding into the discharge vessel portion 2, so that external power supply is performed. The other ends of the bodies 5a and 5b
a, 3b project outward from the ends. Holding part 3a,
At the end of 3b, the seal 6 seals between the inner peripheral surfaces of the holding portions 3a, 3b and the outer peripheral surfaces of the external power supply bodies 5a, 5b.

Next, a description will be given of the reflection mirror 7 that reflects light emitted from the high-pressure discharge lamp 1 and distributes the light in a predetermined direction. As shown in FIG. 1, the reflecting mirror 7 includes a mirror base 8, a concave reflecting surface 9, an opening 10 located at an end of the reflecting surface 9, a support base 11, and a protective case 1.
2 and a fixing member 13. Reflecting surface 9 and opening 1
0 is formed on the front side of the reflection mirror 7, and the support 11, the protective case 12 and the fixing member 13 are provided on the back side of the reflection mirror 7.

The support base 11 is located on the back side of the reflection mirror 7 and is formed integrally with the mirror base 8. The fixing member 13 supports the protection case 12 by being fixed to the support base 11. A translucent cover 14 for closing the opening 10 is attached to the opening 10. The mirror base 8 is provided with mounting holes 15a and 15b for mounting and fixing the high-pressure discharge lamp 1 to the reflection mirror 7.

On the reflection surface 9, a coating film 16, which serves as both an infrared reflection layer and an insulating film, for example, a film of titanium oxide, silicon oxide or the like is formed.

Next, the mounting and fixing of the high-pressure discharge lamp 1 to the reflection mirror 7 will be described. For mounting and fixing the high-pressure discharge lamp 1 to the reflection mirror 7, the holding portions 3a and 3b of the high-pressure discharge lamp 1 are inserted into the mounting holes 15a and 15b, and after the insertion, these mounting holes 15a. This is performed by sealing 15b with cement 17, which is a sealing member. The high-pressure discharge lamp 1 attached and fixed to the reflection mirror 7 is located opposite to the reflection surface 9 and is arranged in parallel with the opening surface of the opening 10.

The ends of the holding portions 3a, 3b inserted into the mounting holes 15a, 15b protrude toward the back surface of the reflection mirror 7. However, the other ends of the external power supply members 5a, 5b projecting outward from the ends of the holding portions 3a, 3b are located within the projection plane of the outer peripheral edge of the opening. Further, the holding parts 3a, 3b
External power supply bodies 5a, 5 protruding outward from the ends of
The other end of b is covered with a protective case 12. And
At a location covered by the protective case 12, an external lead wire 18 is connected to the other end of the external power supply 5a, 5b.

Next, the mounting position of the high-pressure discharge lamp 1 on the reflection mirror 7 will be described with reference to FIG. The two mounting holes 15a and 15b formed in the mirror base 8 are
One of the mounting holes 15a is formed to have a diameter slightly larger than the outer dimensions of the holding portions 3a, 3b, and the other mounting hole 15b is formed to allow the holding portions 3a, 3b to pass therethrough. The hole diameter is made possible and slightly larger than the outer dimensions of the discharge vessel portion 2. That is, the two mounting holes 15a and 15b are formed to have a minimum hole diameter necessary for mounting the high-pressure discharge lamp 1.

The edge A of the two mounting holes 15a and 15b on the same side in the direction orthogonal to the opening 10 is
0 is located on a straight line parallel to the opening
The outer peripheral surfaces of a and 3b are positioned by being pressed against the edge A of the mounting holes 15a and 15b.

Next, the overall structure of the lighting device will be described with reference to FIG. This lighting device includes a high-pressure discharge lamp device shown in FIG. 1, a storage case 19 mounted on the back side of the reflection mirror 7, and a lighting circuit 20 stored in the storage case 19 and connected to the high-pressure discharge lamp 1. And a base 21 attached to the outer periphery of the storage case 19 and connected to the lighting circuit 20.

The storage case 19 is connected to the protection case 12 by a pair of pins 22, and the protection case 12 is provided rotatably about the pins 22. A bearing 23 is interposed between the storage case 19 and the base 21, and the storage case 19 is rotatably provided around the base 21 by the bearing 23.

In such a configuration, first, a procedure for attaching and fixing the high-pressure discharge lamp 1 to the reflection mirror 7 will be described with reference to FIG. The high-pressure discharge lamp 1 disposed on the back side of the reflection mirror 7 and facing the mounting hole 15b having a large hole diameter is inserted into the mounting hole 15b in a direction parallel to the opening surface of the opening 10 (the direction of the arrow X). . After the holder 3a and the discharge vessel 2 pass through the mounting hole 15b, the holder 3a is moved from the reflection surface 9 side to the mounting hole 15a.
And the other holding portion 3b is positioned in the mounting hole 15b. Then, the outer peripheral surfaces of the holding portions 3a and 3b are
a, 15b against the edge A on the same side, and
a, 15b are filled with cement 17, and the reflection mirror 7 and the high-pressure discharge lamp 1 are fixed.

When the high-pressure discharge lamp 1 is fixedly mounted on the reflecting mirror 7, the outer peripheral surfaces of the holding portions 3a and 3b are pressed against the same side edge A of the two mounting holes 15a and 15b to thereby provide the high-pressure discharge lamp. 1 is positioned parallel to the opening surface of the opening 10 of the reflection mirror 7. Thereby, the light distribution performance by the reflection mirror 7 is improved.

The cement 17 filled in the mounting holes 15a and 15b for fixing the high-pressure discharge lamp 1 to the reflection mirror 7 has a lower reflectance than the reflection surface 9. In the present embodiment, since the two mounting holes 15a and 15b are formed with the minimum hole diameter necessary for mounting the high-pressure discharge lamp 1, the holding portions 3a and 15b of the high-pressure discharge lamp 1 are formed.
When the high-pressure discharge lamp 1 is fixed by filling the mounting holes 15a and 15b into which the cementing holes 3b are inserted, the exposed area of the cement 17 on the reflecting surface 9 becomes the minimum necessary. A decrease in the reflection performance of the reflection mirror 7 due to the exposure of the light 17 is slight.

Further, by pressing the outer peripheral surfaces of the holding portions 3a and 3b against the edges A of the mounting holes 15a and 15b, the portion where the cement 17 is exposed is hidden by the holding portions 3a and 3b when the front of the opening 10 is viewed from the front. Therefore, the deterioration of the reflection performance of the reflection mirror 7 due to the exposure of the cement 17 on the reflection surface 9 is further reduced.

When the high-pressure discharge lamp 1 is inserted into the mounting hole 15b, as shown by the arrow Y in FIG. 3, the high-pressure discharge lamp 1 is inserted from a direction perpendicular to the portion of the mirror base 8 where the mounting hole 15b is formed. After the portion 2 has passed through the mounting hole 15b, the direction of the high-pressure discharge lamp 1 may be changed to be parallel to the opening surface of the opening 10, and the holding portion 3a may be inserted into the mounting hole 15a. By doing so, the hole diameter of the mounting hole 15b can be reduced, and the exposed area of the cement 17 on the reflection surface 9 when the cement 17 is filled is further reduced.

As shown in FIG. 5, the two mounting holes 15a and 15b formed in the mirror substrate 8 are formed so that the edges B on the same side of the mounting holes 15a and 15b in the direction orthogonal to the opening 10 are formed. , May be formed on a straight line parallel to the opening surface of the opening 10. In this case, the reflection mirror 7
When the high pressure discharge lamp 1 is fixedly mounted on the
The high-pressure discharge lamp 1 is positioned parallel to the opening surface of the opening 10 of the reflection mirror 7 by pressing the outer peripheral surfaces of the a and 3b against the edge B on the same side in the two mounting holes 15a and 15b. .

Since the holding portions 3a and 3b of the high-pressure discharge lamp 1 fixed to the reflection mirror 7 are projected from the mounting holes 15a and 15b toward the back side of the reflection mirror 7, the reflection mirror 7 is attached to the holding portions 3a and 3b. There is no need to surround the entire high-pressure discharge lamp 1 including 3b, and the size of the reflection mirror 7 can be reduced. By reducing the size of the reflecting mirror 7, the size of the high-pressure discharge lamp device can be reduced without changing the size of the high-pressure discharge lamp 1.

Further, the holding portions 3a and 3b of the high-pressure discharge lamp 1 fixed to the reflection mirror 7 are attached to the mounting holes 15a and 15a.
By protruding from the back surface 5b toward the back surface of the reflection mirror 7, a part of the heat generated in the electrodes 4a, 4b is transmitted to the holding portions 3a, 3b and radiated to the back surface of the reflection mirror 7. Thus, it is possible to suppress a temperature rise in a space surrounded by the reflection surface 9 of the reflection mirror 7 and the translucent cover 14, and to stabilize the lighting state of the high-pressure discharge lamp 1 by reducing the influence of heat. And the service life can be extended.

Further, since the other ends of the external power supply members 5a, 5b projecting from the ends of the holding portions 3a, 3b are located within the projection plane of the outer peripheral edge of the opening 10, the outer dimensions of the protective case 12 are set to the reflecting mirror. 7 can be suppressed to substantially the same diameter as the outer peripheral edge of the opening 10, whereby the high-pressure discharge lamp device and the lighting device using the high-pressure discharge lamp device can be reduced in size.

The external lead wires 18 are connected to the other ends of the external power supply members 5a and 5b protruding from the ends of the holding portions 3a and 3b. Since the connection portions are covered by the protective case 12, External power supplies 5a, 5b and external lead wires 18
The connection part with the connection can be reliably protected.

The reflecting surface 9 is provided with a coating film 16 which serves as both an infrared reflecting layer and an insulating film. The coating film 16 allows a leakage current from a contact portion between the holding portions 3a and 3b and the reflecting mirror 7 to be formed. Is prevented, and infrared rays are reflected toward the opening 10 side. For this reason, a voltage drop due to generation of a leakage current is prevented, and the high-pressure discharge lamp 1
The voltage required for lighting the lamp is sufficiently secured, and the lighting state of the high-pressure discharge lamp 1 is stabilized. In addition, the infrared rays
, The lighting circuit 20 is prevented from reaching the lighting circuit 20, and even in a lighting device in which the high-pressure discharge lamp 1 and the lighting circuit 20 are close to each other as shown in FIG. Is prevented. By forming the entire reflecting mirror 7 from an insulator, the occurrence of leakage current can be more reliably prevented.

In the lighting device shown in FIG. 4, since the high-pressure discharge lamp device and the lighting circuit 20 are integrated, the lighting device can be used by inserting the base 21 into an existing lamp socket. A highly versatile lighting device can be obtained.

In this lighting device, a bearing 23 is interposed between the base 21 and the storage case 19, and the storage case 19
And the protective case 12 are rotatably connected to each other by the pins 22. Therefore, the storage case 19 is rotated around the bearings 23, and the high-pressure discharge lamp device is rotated about the pins 22. The direction of illumination by the device can be changed to any direction.

Next, a second embodiment of the present invention will be described with reference to FIG.
It will be described based on. The same parts as those described in FIGS. 1 to 5 are denoted by the same reference numerals, and description thereof will be omitted. FIG. 6 is an exploded vertical front view showing a mounting structure of the high-pressure discharge lamp 1 on the reflection mirror 7.

The reflecting mirror 7 has a first reflecting mirror 7a and a second reflecting mirror 7a, which are divided into two by a plane parallel to the opening surface of the opening 10.
A first reflecting mirror 7a and a second reflecting mirror 7b.
The reflecting mirror 7b is joined at the joining surfaces 24a and 24b, and is fixed by a screwing mechanism (not shown). On the joint surface 24a of the first reflection mirror 7a, a concave portion 25 is formed as a mounting hole into which the holding portions 3a and 3b of the high-pressure discharge lamp 1 are inserted.

The inner peripheral surface of the concave portion 25 has the holding portions 3a, 3a.
b and abuts on a part of the outer peripheral surface, and the joining surfaces 24a and 24
b are joined, the joining surfaces 24b are held by the holding portions 3a, 3b.
Is formed in such a size as to come into contact with a part of the outer peripheral surface thereof.

In such a configuration, the high-pressure discharge lamp 1 is mounted on the reflecting mirror 7 by the first reflecting mirror 7a.
And the second reflection mirror 7b are separated from each other, the holding portions 3a, 3b of the high-pressure discharge lamp 1 are inserted into the recess 25, and the first reflection mirror 7 and the second reflection mirror 7b are joined at the joining surfaces 24a, 24b. It is performed by fixing. Therefore, the work of attaching the high-pressure discharge lamp 1 to the reflection mirror 7 can be easily performed. Moreover, the first reflection mirror 7a and the second reflection mirror 7
By fixing the holding portions 3a and 3b between the inner peripheral surface of the concave portion 25 and the joint surface 24b when the fixing member b is fixed, the position of the high-pressure discharge lamp 1 can be fixed without using cement or the like.

The inner peripheral surface of the concave portion 25 is
By forming the recesses a and 3b in a small size in contact with the outer peripheral surfaces, the reflection performance of the reflection mirror 7 due to the formation of the recess 25 is slightly reduced.

Here, the reflection mirror 7 is replaced with the first reflection mirror 7.
a and the second reflection mirror 7b, the first reflection mirror 7a and the second reflection mirror 7b may be subjected to different surface treatments, or may be divided into the first reflection mirror 7a and the second reflection mirror 7b. Can be formed of different materials.

For example, the first reflection mirror 7a may be coated with a reflection film that reflects visible light and infrared light, and the second reflection mirror 7b may be coated with a reflection film that reflects only visible light. By coating the first reflection mirror 7a with a reflection film that reflects visible light and infrared light, the influence of heat on the lighting circuit 20 (see FIG. 4) disposed behind the reflection mirror 7 can be reduced. . In addition, by coating the second reflection mirror 7b with a reflection film that reflects only visible light, the amount of irradiation of the surface to be irradiated with infrared rays by the high-pressure discharge lamp device can be suppressed, and the surface of the surface to be irradiated can be suppressed. Heat burn can be prevented.

Further, the first reflecting mirror 7a is formed of a ceramic or the like which does not easily transmit infrared rays.
b may be formed of glass or the like that easily transmits infrared rays. Also in this case, the influence of heat on the lighting circuit 20 can be reduced, and the heat scoring of the irradiated surface can be prevented.

[0071]

According to the high pressure discharge lamp device of the present invention, the holding portion of the high pressure discharge lamp is inserted into the mounting hole formed in the reflection mirror, and the end of the holding portion is placed on the back side of the reflection mirror. The size of the high-pressure discharge lamp device can be reduced without changing the size of the high-pressure discharge lamp, because the size of the high-pressure discharge lamp can be greatly reduced compared to the case where the reflection mirror surrounds the entire high-pressure discharge lamp including the holding portion. Can be achieved. In addition, since part of the heat generated from the electrodes of the high-pressure discharge lamp is transmitted to the holding portion and radiated to the back side of the reflecting mirror, the temperature in the space surrounded by the reflecting surface of the reflecting mirror and the translucent cover is reduced. The rise can be suppressed, the influence of heat can be reduced, the lighting state of the high-pressure discharge lamp can be stabilized, and the life can be prolonged.

According to the high-pressure discharge lamp device of the second aspect of the invention, the reflecting mirror has a surface parallel to the opening surface of the opening.
A first reflecting mirror and a second reflecting mirror which are divided into two, and a concave portion serving as a mounting hole is formed in at least one of the joining surfaces where the first reflecting mirror and the second reflecting mirror are joined. Since the holding portion of the high-pressure discharge lamp is inserted into this concave portion, the mounting of the high-pressure discharge lamp on the reflection mirror separates the first reflection mirror and the second reflection mirror,
This can be performed by inserting the holding portion of the high-pressure discharge lamp into the concave portion and joining and fixing the joining surface of the first reflection mirror and the joining surface of the second reflection mirror. For this reason, the work of attaching the high-pressure discharge lamp to the reflection mirror can be easily performed. In addition, the concave portion can be formed to have a small size such that its inner peripheral surface is in contact with the outer peripheral surface of the holding portion, whereby the mounting operation of the high-pressure discharge lamp on the reflecting mirror can be performed without any trouble. Therefore, it is possible to minimize a decrease in the reflection performance of the reflection mirror due to the above.

According to the third aspect of the present invention, in the high-pressure discharge lamp device according to the first or second aspect, the other end of the external power supply protruding from the end of the holding portion is positioned within the projection plane of the outer peripheral edge of the opening. And a protective case that covers the other end of the external power supply is provided on the back side of the reflection mirror, so that the size of the protection case can be reduced, and the other end of the external power supply and the external lead wire, etc. Can be reliably protected.

According to the invention described in claim 4, according to claim 1,
In the high-pressure discharge lamp device according to 2 or 3, by forming the reflection mirror with an insulator, it is possible to prevent generation of leakage current from a contact portion between the holding portion and the reflection mirror,
The voltage required for lighting the high-pressure discharge lamp is sufficiently ensured, and the lighting state can be stabilized.

According to the fifth aspect of the present invention, the first aspect is provided.
3. The high-pressure discharge lamp device according to 3 or 4, wherein one of the mounting holes is formed so that the holding portion can be inserted therein and has a diameter slightly larger than the outer dimension of the holding portion, and the other mounting hole can be inserted through the discharge vessel portion. However, since the hole diameter is slightly larger than the outer dimensions of the discharge vessel portion, the two mounting holes can be made the minimum hole diameter necessary for mounting the high-pressure discharge lamp. With this, when these holding holes are sealed with the sealing member after the holding portions are inserted into the mounting holes, the surface area of the sealing member exposed on the reflecting surface can be minimized, and the sealing surface can be sealed on the reflecting surface. It is possible to minimize a decrease in the reflection performance of the reflection mirror due to the exposure of the stop member.

According to the invention described in claim 6, according to claim 1,
In the high-pressure discharge lamp device according to 3, 4 or 5, the edges of the two mounting holes on the same side orthogonal to the opening are located on a straight line parallel to the opening surface of the opening. By pressing the outer peripheral surface of the inserted holding portion against its edge, the high-pressure discharge lamp can be positioned parallel to the opening surface of the opening of the reflecting mirror, thereby improving the light distribution performance of the reflecting mirror. be able to.

According to the invention of claim 7, according to claim 1,
The high-pressure discharge lamp device according to 2, 3, 5, or 6,
Since the insulating film is coated on at least the portion of the reflecting mirror that contacts the holding part, it is possible to prevent the occurrence of leakage current from the contact part between the holding part and the reflecting mirror, etc., and to sufficiently supply the voltage required to light the high-pressure discharge lamp. And the lighting state can be stabilized.

According to the illumination device of the invention described in claim 8,
A high pressure discharge lamp device according to any one of claims 1 to 7, a storage case attached to the back side of the reflection mirror, a lighting circuit housed in the storage case and connected to the high pressure discharge lamp, and a storage case. Since the lighting device includes a base attached to an outer peripheral portion of the lighting device and connected to a lighting circuit, the lighting device can be downsized by disposing the lighting circuit near the high-pressure discharge lamp device. The lighting device can be used simply by attaching it to an existing lamp socket or the like to which power from a power source is supplied, and can be used in various places with high versatility.

According to the ninth aspect of the present invention, in the lighting device of the eighth aspect, since the infrared reflecting layer is formed on the reflecting mirror, the infrared light emitted from the high-pressure discharge lamp passes through the reflecting mirror and is turned on. Can be prevented by the infrared reflective layer, and therefore, even when the lighting device is downsized and the high-pressure discharge lamp and the lighting circuit are arranged close to each other, the lighting circuit can be protected from heat.

[Brief description of the drawings]

FIG. 1 is a vertical sectional front view showing a high-pressure discharge lamp device according to a first embodiment of the present invention.

FIG. 2 is an enlarged front view showing a high-pressure discharge lamp.

FIG. 3 is a vertical sectional front view showing a mounting position of a high-pressure discharge lamp on a reflection mirror.

FIG. 4 is a vertical sectional front view showing an illumination device using the high-pressure discharge lamp device.

FIG. 5 is a longitudinal sectional front view showing a modified example of a mounting position of a high-pressure discharge lamp on a reflection mirror.

FIG. 6 is an exploded vertical front view showing a structure for mounting a high-pressure discharge lamp on a reflection mirror according to a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 High-pressure discharge lamp 2 Discharge container part 3a, 3b Holding part 4a, 4b Electrode 5a, 5b External power supply 7 Reflection mirror 7a First reflection mirror 7b Second reflection mirror 9 Reflection surface 10 Opening 12 Protective case 14 Translucent cover 15a, 15b Mounting hole 16 Insulating film, infrared reflective layer 17 Sealing member 19 Storage case 20 Lighting circuit 21 Base 24a, 24b Joining surface 25 Recess, mounting hole A Edge of mounting hole B Edge of mounting hole

Claims (9)

[Claims] 1. A discharge vessel section in which a discharge medium is sealed and a pair of electrodes are opposed to each other, holding sections formed at both ends of the discharge vessel section and extending in opposite directions, and held in the holding section. A high-pressure discharge lamp having an external power supply having one end connected to the electrode and the other end projecting outward from the end of the holding portion; a concave reflecting surface and an end of the reflecting surface; A reflection mirror having an opening located on the front side; and the holding portion of the high-pressure discharge lamp formed in the reflection mirror and opposed to the reflection surface and arranged in parallel with the opening surface of the opening. Two mounting holes, the ends of which are projected to the back side of the reflection mirror; a sealing member that seals the mounting hole into which the holding portion is inserted; and a sealing member that closes the opening. A translucent cover attached to the reflecting mirror; High pressure discharge lamp device. 2. A discharge vessel section in which a discharge medium is sealed and a pair of electrodes are arranged to face each other, holding sections formed at both ends of the discharge vessel section and extending in opposite directions, and held in the holding section. A high-pressure discharge lamp having an external power supply having one end connected to the electrode and the other end projecting outward from the end of the holding portion; a concave reflecting surface and an end of the reflecting surface; A reflection mirror having an opening located on the front side; and the holding portion of the high-pressure discharge lamp formed in the reflection mirror and opposed to the reflection surface and arranged in parallel with the opening surface of the opening. And two light-transmitting covers attached to the reflection mirror so as to close the opening. Are two parallel to the opening surface of the opening A concave portion serving as the mounting hole is formed on at least one of the joining surfaces where the first reflecting mirror and the second reflecting mirror are joined, the first reflecting mirror and the second reflecting mirror being divided; High pressure discharge lamp equipment. 3. The protection case, wherein the other end of the external power supply protruding from an end of the holding portion is located within a projection plane of an outer peripheral edge of the opening, and the other end of the external power supply is covered by the protective case. The high-pressure discharge lamp device according to claim 1, wherein the high-pressure discharge lamp device is provided on a back side of the reflection mirror. 4. The high-pressure discharge lamp device according to claim 1, wherein the reflection mirror is formed of an insulator. 5. One of the mounting holes is formed so that the holding portion can be inserted therein and has a diameter slightly larger than an outer dimension of the holding portion. The other mounting hole allows the discharge vessel portion to be inserted. 5. The high-pressure discharge lamp device according to claim 1, wherein said discharge vessel portion has a hole diameter slightly larger than an outer dimension of said discharge container portion. 6. An edge of the two mounting holes on the same side in a direction orthogonal to the opening is located on a straight line parallel to the opening surface of the opening. The high-pressure discharge lamp device according to claim 1. 7. The high-pressure discharge lamp device according to claim 1, wherein an insulating film is coated on at least a portion of said reflection mirror which is in contact with said holding portion. 8. The high-pressure discharge lamp device according to claim 1, a storage case attached to a back side of the reflection mirror, and stored in the storage case and connected to the high-pressure discharge lamp. A lighting device comprising: a lighting circuit; and a base attached to an outer peripheral portion of the storage case and connected to the lighting circuit. 9. The lighting device according to claim 8, wherein an infrared reflection layer is formed on the reflection mirror.