WO2013021411A1

WO2013021411A1 - Discharge lamp device and assembly method

Info

Publication number: WO2013021411A1
Application number: PCT/JP2011/004468
Authority: WO
Inventors: 倉橋　正人; 大澤　孝
Original assignee: 三菱電機株式会社
Priority date: 2011-08-05
Filing date: 2011-08-05
Publication date: 2013-02-14

Abstract

In this discharge lamp device, the total length is shortened by making a light emitting body (1) be in the proximity of a reference surface (9), while light blockage is prevented by disposing a metal band (7) and fixation plates (11) within a structural member (5). During assembly, an opening part (12) is provided on a side surface of the structural member (5) to expose a point at which the metal band (7) and fixation plates (11) are to be welded, and an electrode for welding is inserted.

Description

Discharge lamp device and assembly method

The present invention relates to a discharge lamp device used as a light source of an on-vehicle headlamp (headlamp) and an assembling method thereof.

As a light source for an in-vehicle headlamp, there is one using a discharge lamp (High Intensity Discharge; HID lamp) (for example, refer to Patent Document 1). This discharge lamp is brighter than a halogen lamp which is a conventional light source and has excellent visibility at night.
A gas such as a pair of opposed electrodes, xenon and metal halide is enclosed inside the light emitting sphere of the discharge lamp, and the enclosed gas is excited by arc discharge between the opposed electrodes to be close to natural white light. Light is obtained and the excitation light is used as a light source. The headlamp irradiates light emitted from the light source in front of the vehicle body using a reflecting mirror and a lens. As the reflecting mirror, a spheroidal reflecting mirror or a rotating parabolic reflecting mirror is used. By installing this light emitting sphere near the focal point of these reflecting mirrors, a parallel beam is generated in front of the vehicle body. Irradiation can provide a desired light distribution pattern for a headlamp.

In recent years, it has become important to reduce the size and weight of equipment placed in the engine room of automobiles. The downsizing of the equipment allows the vehicle compartment to be expanded and the engine room to be easily secured, so that new electronic equipment that promotes fuel efficiency can be easily added. Further, the fuel consumption can be improved by reducing the weight of the device as the device is reduced in size.

The headlamps are also being reduced in size as part of securing space in the engine room and for lighter weight. It is effective in securing the space in the engine room to shorten the length of the headlamp, particularly in the longitudinal direction of the automobile. The length of the headlamp in the front-rear direction largely depends on the size of the reflector provided in the headlamp. Therefore, in order to reduce the size of the headlamp, the reflection of the spheroidal surface used in a projector-type headlamp equipped with a convex lens is required. It is effective to shorten the focal length of a rotating parabolic reflector used for a mirror or a reflector type headlamp. By shortening the focal length, the reflecting mirror becomes shallower, the depth becomes shorter, and the length of the headlamp in the front-rear direction can be shortened. In order to shorten the focal length of the reflecting mirror, it is necessary to shorten the distance between the light emitting sphere part and the reflecting mirror, and further the distance between the light emitting sphere part and the reference plane.

JP 2007-134098 A

For example, in JISC7506-1, the focal length is specified to be 27.1 mm. However, in order to further reduce the focal length by reducing the focal length, it is conceivable to move the light emitting sphere in a direction closer to the reference plane. . However, the conventional discharge lamp such as Patent Document 1 described above has a light emitting sphere part including a pair of electrodes for generating an arc, an outer tube covering the light emitting sphere part, and a reference plane for positioning the light emitting sphere part in the vicinity of the focal point. A structural member provided on the opposite side of the light emitting sphere portion of the reference surface, a metal band fastened to an outer tube between the light emitting sphere portion and the reference surface, and a fixing plate for fixing the metal band and the structural member Therefore, when the light emitting sphere is moved closer to the reference plane, the metal band is also approached. Then, the site | part from which light is interrupted with a metal band generate | occur | produces, and light cannot be utilized effectively.

In order to avoid this, there is a method of changing the positions of the metal band and the fixing plate together with the light emitting sphere. Desirably, the metal band and the light emitting sphere are also moved by the same direction and the same distance as the moving distance of the light emitting sphere to the reference plane side. However, if the metal band and the fixing plate move inside the structural member behind by this movement, the connecting portion of the metal band and the fixing plate is hidden inside the structural member, and it is extremely difficult to fix the outer tube by connecting the two. There was a problem of becoming.

More specifically, in the conventional discharge lamp, one end of the fixed plate is inserted and fixed to a resin structural member, and the other end is fixed to a metal band fastened to the outer tube. Since the other end of the fixing plate protrudes out of the structural member (in the direction of the light emitting sphere) and the connection portion with the metal band is exposed, it is extremely easy to weld or bond to the metal band.
On the other hand, when the metal band is moved inside the structural member for the purpose of shortening the distance between the light emitting sphere and the reference surface, the fixing plate must be fixedly held inside the structural member. Therefore, in order to fix these metal bands and the fixing plate, it is necessary to carry out through a narrow gap between the outer tube and the structural member.
In addition, since this gap is as narrow as several millimeters, it is necessary to fix the metal band and the fixing plate using a very special method, but since the discharge lamp and its surroundings are hot, use an adhesive that uses resin. I can't do it. In order to obtain a fixing method that can withstand high temperatures and reliability, welding of both is desirable, but it is extremely difficult to weld through a gap of several millimeters formed between the outer tube and the structural member.

This invention was made in order to solve the above-mentioned problems, while arranging the metal band and the fixing plate inside the structural member to shorten the distance between the light emitting sphere and the reference surface without blocking light, It is an object of the present invention to provide a discharge lamp device and an assembling method in which a metal band hidden in a structural member and a fixing plate can be easily connected by a highly reliable method. Another object of the present invention is to reduce the size and weight of the entire headlamp including the reflecting mirror by using this discharge lamp device.

In the discharge lamp device according to the present invention, the fixing plate is disposed inside the structural member, the structural member has an opening on the side surface, and the position of the opening is aligned with the position of the connection portion of the metal band and the fixing plate. It is what is arranged.

The discharge lamp device assembly method according to the present invention is a first assembly member in which an outer tube that accommodates and seals the light emitting sphere and a metal band that is fastened to one end of the outer tube are assembled. An assembling step, a second assembling step by fixing one end of the fixing plate at a position facing the opening inside the structural member having an opening on the side surface, and a first assembling step, One end side of the outer tube to which the metal band of the assembly member is fastened is inserted into the structural member of the second assembly member, and the position of the opening is aligned with the position of the portion connecting the metal band and the fixing plate. And a connecting step of connecting a metal band and a fixing plate by inserting a connection equipment from the opening.

According to the present invention, since the connection equipment is inserted from the opening provided in the structural member and the metal band disposed in the structural member and the fixing plate are connected, the light emitting sphere portion is used as the reference plane. Even if the total length of the discharge lamp is shortened by approaching, the metal band hidden in the structural member and the fixing plate can be easily connected by a highly reliable method. Moreover, since the metal band and the fixing plate are disposed inside the structural member, light is not blocked. Furthermore, since the focal length can be shortened and the reflecting mirror can be reduced in size by bringing the light emitting sphere portion closer to the reference plane, the entire headlamp including the reflecting mirror can be reduced in size and weight.

It is a figure which shows the structure of the discharge lamp apparatus which concerns on Embodiment 1 of this invention. FIG. 5 is a perspective view for explaining an assembly process of the discharge lamp device according to the first embodiment. It is a figure explaining the connection process of the discharge lamp apparatus which concerns on Embodiment 1. FIG. FIG. 3 is a perspective view illustrating a configuration example of a fixing plate used in the discharge lamp device according to Embodiment 1. It is sectional drawing explaining the state which attached the discharge lamp apparatus which concerns on Embodiment 1 to the reflective mirror. It is a perspective view which shows the modification of the discharge lamp apparatus which concerns on Embodiment 1. FIG. It is a figure which shows the structure of the discharge lamp apparatus which concerns on Embodiment 2 of this invention. It is a figure which shows the structure of the discharge lamp apparatus which concerns on Embodiment 3 of this invention. It is an external appearance perspective view which shows the structure of the discharge lamp apparatus which concerns on Embodiment 4 of this invention. It is sectional drawing which shows the state which attached the discharge lamp apparatus which concerns on Embodiment 4 to the reflective mirror. It is an external appearance perspective view which shows the structure of the discharge lamp apparatus which concerns on Embodiment 5 of this invention. It is a figure explaining the attachment method to the reflecting mirror of the discharge lamp apparatus which concerns on Embodiment 5. FIG. It is an external appearance perspective view which shows the structure of the discharge lamp apparatus which concerns on Embodiment 6 of this invention. It is an external appearance perspective view which shows the structure of the discharge lamp apparatus which concerns on Embodiment 7 of this invention.

Hereinafter, in order to explain the present invention in more detail, modes for carrying out the present invention will be described with reference to the accompanying drawings.
Embodiment 1 FIG.
FIG. 1 is a diagram showing a configuration of a discharge lamp device according to the first embodiment. The light emitting sphere 1 is a part that forms an arc discharge and serves as a light source, and is configured such that a pair of

electrodes

2a and 3a face each other, and these

electrodes

2a and 3a and the discharge medium are sealed with quartz glass. Yes. Further, the light emitting sphere 1 is enclosed and fixed in a cylindrical outer tube 4. The return line 2 connected to one electrode 2 a is routed from the tip of the outer tube 4 to the outside and is routed toward the structural member 5, and a part thereof is covered with the insulating tube 6. The lead wire 3 connected to the other electrode 3a is routed directly to the inside of the structural member 5 (shown in cross section in FIG. 1) through the center of the outer tube 4. Further, a metal band 7 is tightly fastened to a portion of the outer tube 4 inserted into the structural member 5. The above is the configuration of the discharge lamp.

The structural member 5 constitutes a part of the discharge lamp device, and the return wire 2 coming out from the light emitting sphere 1 and the

electrodes

2b and 3b of the lead wire 3 are electrically connected to each other, and are housed for insulation. A box-shaped housing. In the example of FIG. 1, the structural member 5 has the same configuration as the D1 (or D3) standard defined in JIS C7506-1. That is, an igniter circuit (not shown) for generating a high-voltage pulse is housed in the structural member 5, the

electrodes

2b and 3b and the igniter circuit are electrically connected, and the igniter circuit is electrically connected from the outside. It is the structure provided with the connector (not shown).
Alternatively, a lighting device-integrated discharge lamp device in which a ballast circuit and an igniter circuit for lighting the discharge lamp are housed in the structural member 5 may be used. Since the discharge lamp and the lighting device are integrated, a cable line for connecting the discharge lamp and the lighting device, which has been conventionally required, becomes unnecessary, and a light weight effect is obtained. In addition, the conventional cable line includes a high voltage line. However, since the high voltage line can be shortened and further accommodated in the structural member 5, it is necessary to cope with aging of the high voltage line. This has the effect of improving reliability. Further, since the structural member 5 is made of a resin member and accommodates the high voltage line, the insulating layer can be provided with a sufficient thickness.
Or you may make it the same connector shape as D2 and D4 standards which are mentioned later.

A cylindrical tubular portion 13 is provided on the surface of the structural member 5 facing the light emitting sphere 1 side. Further, a planar member 8 having an annular shape and a diameter larger than the diameter of the cylindrical portion 13 is provided at one end portion of the cylindrical portion 13, and an end surface of the planar member 8 facing the light emitting sphere portion 1 is provided. It becomes the reference plane 9. The reference surface 9 is in contact with the back of the reflecting mirror of the headlamp (lamp) and serves as a member for positioning the light emitting sphere 1 near the focal point of the reflecting mirror. Further, the constricted cylindrical portion 13 serves as a portion for engaging a fastening member for fixing the discharge lamp device to the reflecting mirror.

The hole 10 formed in the planar member 8 communicates with the structural member 5, one end side of the outer tube 4 is inserted into the hole 10, and the metal band 7 is located inside the structural member 5. Further, four metal fixing plates 11 are attached inside the structural member 5. The end 11a of each fixing plate 11 is inserted into the structural member 5, and the other end 11b is fixed to the metal band 7 by welding.

As described above, in the discharge lamp device according to the first embodiment, the fixing plate 11 and the metal band 7 are disposed on the structural member 5 side from the reference surface 9.
Furthermore, the opening part 12 is provided in the structural member 5 so that the connection part of the fixing plate 11 and the metal band 7 is exposed. The number of openings 12 is preferably provided so that the number of openings 12 and the number of fixing plates 11 are the same, for example, if the number of fixing plates 11 is four, the number of openings 12 is also four. Further, the shape and size of the opening 12 may be such a size that the connecting portion between the fixing plate 11 and the metal band 7 is sufficiently exposed to the equipment for connection, as will be described later.

FIG. 2 is a perspective view for explaining an assembly process of the discharge lamp device.
Before assembling the discharge lamp device, the metal band 7 is fixed to the outer tube 4 containing the light emitting sphere 1, and the return wire 2 is covered with the insulating tube 6. The discharge lamp in this state is referred to as a first assembly member A. Four fixing plates 11 are inserted into the structural member 5 having the opening 12, and the member in this state is referred to as a second assembly member B.
Subsequently, the first assembly member A is inserted into the hole portion 10 of the second assembly member B so that the metal band 7 is placed in a position facing the fixing plate 11 of the structural member 5, and the method will be described later. The outer plate 4 is fixed to the structural member 5 by connecting the fixing plate 11 and the metal band 7. Although not shown in the drawing, the

electrodes

2b and 3b are connected to the electric circuit and the external terminal inside the structural member 5 to complete the discharge lamp device. In order to connect the

electrodes

2b and 3b, one surface of the structural member 5 may be opened and the opening portion may be closed after the connection.

FIG. 3 is a diagram illustrating a connection process of the discharge lamp device.
Since the fixing plate 11 and the opening 12 are aligned in advance, the welding electrode (−) 21 and the welding electrode (+) 22 which are connecting equipment are inserted from the opening 12, and the fixing plate 11 is inserted. And the metal band 7 are in contact with each other, and a current flows. Since a contact resistance exists at a portion where the fixing plate 11 and the metal band 7 are in electrical contact, the contact resistance portion generates heat due to the energization current, and as a result, welding is completed by the heat. After the welding is completed, the outer electrodes 4 and the structural member 5 are firmly fixed by removing the

welding electrodes

21 and 22.
Thus, by providing the opening 12 on the side surface of the structural member 5, even if the metal band 7 is stored on the structural member 5 side from the reference surface 9 and hidden, it can be connected by welding.
Here, the connection method has been described by taking resistance welding as an example. However, TIG (Tungsten Inert Gas) welding and laser welding can be similarly performed.

Here, a configuration example of the fixed plate 11 will be described.
One end 11a of the fixing plate 11 shown in FIGS. 4 (a) to 4 (e) is inserted into the structural member 5 and fixed. Since the other end 11b is connected (welded) to the metal band 7, it is bent at approximately 90 degrees. The bending method may be any method, for example, bending at 90 degrees at one time as shown in FIG. 4 (b), bending at 90 degrees at two or more times as shown in FIG. 4 (a), What is necessary is just to bend in the shape of a smooth curve like FIG.4 (c)-FIG.4 (e).
Further, the portion to be welded on the end portion 11b side may be formed flat as shown in FIGS. 4 (a) to 4 (c), and the hole 11c is opened as shown in FIG. 4 (d). May be. Moreover, the thing which formed the convex part 11d like FIG.4 (e) may be used. FIG. 4D is suitable for laser welding, and the laser beam reaches the surface of the metal band 7 through the hole 11c. Therefore, both the metal band 7 and the fixing plate 11 are melted and welded. Therefore, there is an effect that a strong welding can be performed. FIG. 4 (e) is suitable for resistance welding, where the metal band 7 and the fixing plate 11 are in contact with each other within a narrow range of the convex portion 11d, so that the contact resistance increases, and heat is generated at a pinpoint. This has the effect of promoting robust welding by promoting the melting of the steel.

Next, the positional relationship between the discharge lamp device and the reflecting mirror will be described.
FIG. 5 is a cross-sectional view illustrating a state in which the discharge lamp device is attached to the reflecting mirror 30. FIG. 5A is a conventional discharge lamp device, FIG. 5B is a modified example of the conventional structure, and FIG. (C) represents the discharge lamp device according to the first embodiment. In the discharge lamp device, the outer tube 4 is inserted from the back side of the reflecting mirror 30, and the light emitting sphere 1 is positioned near the focal point of the reflecting mirror 30 by the reference surface 9 coming into contact with the back surface of the reflecting mirror 30. A method of attaching the discharge lamp device to the reflecting mirror 30 will be described in detail in

Embodiments

4 and 5 below.

As shown in FIG. 5A, in the conventional structure according to JIS C7506-1, the distance (focal length) F ₁ between the light emitting sphere 1 and the reference plane 9 is 27.1 mm. On the other hand, in FIGS. 5 (b) and 5 (c), by shortening the focal length F ₂ than 27.1mm close to the light-emitting spherical portion 1 to the reference surface 9, as well as shortening the length of the discharge lamp, The length of the reflecting mirror 30 in the front-rear direction is shortened. However, in the configuration of FIG. 5B, since the metal band 7 is at the same position as in FIG. 5A, a part of the light emitted from the light emitting sphere 1 is blocked by the metal band 7 and is reflected by the reflecting mirror 30. Not reach. As a result, the light utilization efficiency decreases. On the other hand, in the configuration of the first embodiment shown in FIG. 5C, the metal band 7 is housed inside the structural member 5, so that the light irradiated from the light emitting sphere 1 is blocked by the metal band 7. It reaches the reflecting mirror 30 without being reflected and is effectively reflected. Therefore, there is an effect that light can be sufficiently utilized.

As described above, according to the first embodiment, the discharge lamp device includes the outer tube 4 that houses and seals the light emitting sphere 1, the metal band 7 fastened to one end of the outer tube 4, and the light emitting sphere 1. The structural member 5 provided on the opposite side of the light emitting sphere 1 with respect to the reference plane 9 for positioning the lamp near the focal point in the lamp, one end 11a is fixed to the structural member 5, and the other end 11b is A fixing plate 11 connected to the metal band 7 and fixing the outer tube 4 to the structural member 5. The fixing plate 11 is disposed inside the structural member 5, and the structural member 5 has an opening 12 on the side surface. The position of the opening 12 and the position of the connection part of the metal band 7 and the fixing plate 11 are arranged to be aligned. For this reason, it becomes possible to connect the metal band 7 and the fixing plate 11 disposed inside the structural member 5 by inserting a connection equipment from the opening 12 provided in the structural member 5. The metal band 7 hidden in 5 and the fixing plate 11 can be easily connected by a highly reliable method. In addition, since the metal band 7 and the fixing plate 11 are arranged inside the structural member 5, the light from the light emitting sphere 1 is not blocked. Furthermore, since the light emitting sphere 1 can be brought close to the reference plane 9, the overall length of the discharge lamp can be shortened, the focal length can be shortened, and the reflecting mirror 30 can be miniaturized. Accordingly, the entire headlamp including the reflecting mirror 30 can be reduced in size and weight.

Further, according to the first embodiment, the structural member 5 is configured to accommodate an electrical circuit such as a lighting igniter circuit or a ballast circuit. For this reason, the light emitting sphere 1 and the lighting device are integrated, so that the conventionally required cable for connection is not required, and the weight can be reduced in addition to the miniaturization. In addition, since the high voltage line included in the cable line is accommodated in the resin structural member 5, the insulating layer of the high voltage line can be provided with a sufficient thickness, and the reliability is improved.
In particular, when the igniter circuit is housed in the structural member 5 and the discharge lamp and the igniter circuit are integrated, the discharge lamp and the igniter circuit are integrated, and compared with the conventional D1 bulb and D3 bulb. The total length of the electric lamp device can be shortened.

Further, according to the first embodiment, since the connection equipment is an electrode for electric welding or a laser beam for laser welding, a reliable connection method that can withstand high temperatures due to heat generated by the discharge lamp device is easy. Can be implemented.

In the first embodiment, the structural member 5 has a housing shape for housing an electric circuit, but may have a connector shape.
FIG. 6 is a perspective view showing a modification of the discharge lamp device according to the first embodiment. The structural member has the shape of the connector 40, for example, the same shape as the D2 (or D4) standard. An electrode (primary side) 41 is provided on the bottom surface of the connector 40, and an electrode (secondary side) 42 is provided on the side surface. The lead wire 3 is inserted into the connector 40 and electrically connected to the electrode (primary side) 41. The return line 2 is electrically connected to the electrode (secondary side) 42 through the connector 40. Although not visible in the drawing, a fixing plate is inserted inside the connector 40, and an end portion of the fixing plate and a metal band are connected at a position facing the opening 12.
Thus, even in the discharge lamp device in which the structural member has the shape of the connector 40, the light emitting sphere 1 and the reference surface 9 can be brought close to each other as in the first embodiment, and the conventional D2 bulb Compared with the D4 bulb, the overall length of the discharge lamp device can be shortened. In addition, the headlamp including the reflecting mirror 30 can be downsized.

Embodiment 2. FIG.
7A and 7B show the configuration of the discharge lamp device according to the second embodiment. FIG. 7A is an external perspective view, and FIG. 7B is a cross-sectional view. In FIG. 7, parts that are the same as or equivalent to those in FIGS. 1 to 6 are given the same reference numerals, and descriptions thereof are omitted.
In the second embodiment, the structural member 5 a is a cylinder, and the plane of the end of the cylinder is the reference plane 9. A plurality of openings 12 are opened on the side surface of the cylinder, and a fixing plate 11 is inserted inside the cylinder on the side opposite to the light emitting sphere 1 of the opening 12. Since the fixing plate 11 is welded to the metal band 7, the fixing plate 11 is bent in the direction of the light emitting sphere 1 so that the end 11 b opposite to the inserted end 11 a contacts the metal band 7. In this way, by bending the end portion 11 b of the fixing plate 11 in the direction of the light emitting sphere 1 so as to contact the metal band 7, the welding point between the fixing plate 11 and the metal band 7 is exposed through the opening 12. . Therefore, as described in the first embodiment, the welding electrode can be inserted from the opening 12 and welded.

As described above, according to the second embodiment, the structural member 5a is cylindrical, and the reference surface 9 is provided on one end surface thereof. For this reason, the metal band 7 fastened to one end side of the outer tube 4 can be accommodated in the cylindrical structural member 5a, and the size can be reduced.
Furthermore, since the end surface of the cylindrical structural member 5a becomes the reference surface 9, as shown in FIG. 5, the reference surface 9 can be fixed in close contact with the reflecting mirror 30 and can be fixed without wobbling. .

Embodiment 3 FIG.
8A and 8B show the configuration of the discharge lamp device according to Embodiment 3, in which FIG. 8A is an external perspective view, and FIG. 8B is a cross-sectional view. 8 that are the same as or equivalent to those in FIGS. 1 to 7 are given the same reference numerals, and descriptions thereof are omitted.
As in the second embodiment, the structural member 5a is a cylinder, and the plane of the end of the cylinder is the reference plane 9. A plurality of openings 12 are opened on the side surface of the cylinder. However, in the third embodiment, the fixing direction of the fixing plate 11 is different, and the fixing plate 11 is inserted inside the cylinder on the light emitting sphere part 1 side of the opening 12. Since the fixing plate 11 is welded to the metal band 7, the fixing plate 11 is bent in the opposite direction of the light emitting sphere 1 so that the end 11 b opposite to the inserted end 11 a contacts the metal band 7. In this way, by bending the end portion 11 b of the fixing plate 11 in the opposite direction of the light emitting sphere 1 so as to contact the metal band 7, the welding point of the fixing plate 11 and the metal band 7 is exposed through the opening 12. Become. Therefore, as described in the first embodiment, the welding electrode can be inserted from the opening 12 and welded.

As described above, according to the third embodiment, similarly to the second embodiment, the outer tube 4 and the metal band 7 can be accommodated in the structural member 5a, and the size can be reduced. Further, since the reference surface 9 has an annular shape, the reference surface 9 can be fixed in close contact with the reflecting mirror 30, as shown in FIG.

Embodiment 4 FIG.
FIG. 9 is an external perspective view showing the configuration of the discharge lamp device according to Embodiment 4. In FIG. FIG. 10 is a cross-sectional view showing a state in which the discharge lamp device according to Embodiment 4 is attached to the reflecting mirror 30. 9 and 10, the same or corresponding parts as those in FIGS. 1 to 8 are denoted by the same reference numerals and description thereof is omitted.
As in the second and third embodiments, the structural member 5a is a cylinder, and the end of the cylinder is a reference surface 9. In the fourth embodiment, a cylindrical portion 13 is further formed along the cylindrical side surface. In addition, a plurality of openings 12 are opened in the cylindrical portion 13. Further, the portion of the structural member 5 a that is closer to the light emitting sphere 1 than the cylindrical portion 13 and has a diameter larger than the diameter of the cylindrical portion 13 is the planar member 8.

On the other hand, the fastening member 50 is formed with a concave shape that engages with the tubular portion 13, and the two fastening members 50 are inserted into and engaged with the tubular portion 13 from the left and right. Furthermore, as shown in FIG. 10, a female screw 52 into which a screw 51 is screwed is provided on the back surface of the reflecting mirror 30, and the fastening member 50 is screwed to the reflecting mirror 30 by using the screw 51 to discharge the lamp device. To fix.
In addition, the attachment method to the reflecting mirror 30 of a discharge lamp apparatus is not limited to the example of illustration, It can attach by various well-known methods.

As described above, according to the fourth embodiment, a part of the structural member 5a is formed into the tubular portion 13, and the planar member 8 having a diameter larger than the diameter of the tubular portion 13 is provided at one end of the tubular portion 13. The end surface of the flat member 8 is configured as a reference surface 9. For this reason, since the planar member 8 is larger than the cylindrical portion 13 in a flange shape, the fastening member 50 and the like can be easily engaged and fixed to the reflecting mirror 30. Further, since the reference member 9 is also formed into an annular shape by configuring the planar member 8 in an annular shape, it can be fixed in close contact with the reflecting mirror 30 and can be fixed without wobbling.

Needless to say, the mounting method shown in the fourth embodiment can be applied to the discharge lamp device according to the first embodiment.

Embodiment 5. FIG.
FIG. 11 is an external perspective view showing the configuration of the discharge lamp device according to the fifth embodiment. 12A and 12B are diagrams for explaining a method of attaching the discharge lamp device according to Embodiment 5 to the reflecting mirror 30. FIG. 12A shows a state before attachment, and FIG. 11 and 12, the same or corresponding parts as those in FIGS. 1 to 10 are denoted by the same reference numerals and description thereof is omitted.
In the fourth embodiment, the structural member 5a is fixed to the reflecting mirror 30 using screws. However, in the fifth embodiment, a configuration example in which a so-called bayonet-type lock mechanism is used without using screws will be described.
As in the fourth embodiment, the structural member 5 a is a cylinder, and the end surface of the planar member 8 provided on the light emitting sphere part 1 side from the cylindrical part 13 is a reference plane 9. Furthermore, in the fifth embodiment, two or more cuts 60 are formed in the planar member 8, for example. In the example of FIG. 11, cuts 60 are formed at three locations at equal angular intervals of 120 degrees.

On the other hand, as shown in FIG. 12A, a lock mechanism 61 that fits with the planar member 8 is formed on the back surface of the reflecting mirror 30. The lock mechanism 61 in FIG. 12 has three claws 62 provided in accordance with the three cuts 60. When the discharge lamp device is fixed to the reflecting mirror 30, the flat member 8 on the discharge lamp device side and the lock mechanism 61 on the reflecting mirror 30 side are brought into contact with each other, the notch 60 and the claw 62 are fitted, and then FIG. The flat member 8 can be easily held and fixed by the claws 62 by twisting the discharge lamp device as shown in FIG.
FIG. 12 shows only the periphery of the flat member 8 of the discharge lamp device for the sake of simplicity, and the reflection mirror 30 side also shows only the periphery of the lock mechanism 61 for ease of explanation. .

As described above, according to the fifth embodiment, since the end surface of the planar member 8 has an annular shape, a structure that is locked by an attachment method called a bayonet-type locking mechanism is formed, and the reflecting mirror 30 is fixed. Can be fixed easily.

Needless to say, the bayonet-type locking mechanism shown in the fifth embodiment can be applied to the discharge lamp device according to the first embodiment.

Embodiment 6 FIG.
FIG. 13 is an external perspective view showing the configuration of the discharge lamp device according to Embodiment 6. In FIG. In FIG. 13, parts that are the same as or equivalent to those in FIGS. 1 to 5 are given the same reference numerals, and descriptions thereof are omitted.
As in the first embodiment, the structural member 5 has a box shape that houses an electric circuit. However, in the sixth embodiment, the opening 12 a opened in the cylindrical portion 13 has a slit shape and is connected to the end surface of the planar member 8. Even in the opening 12a of this shape, the point where the fixing plate 11 and the metal band 7 are welded is exposed through the opening 12a, so that it is easy to insert and weld a welding electrode for resistance welding, for example. Become.

In the sixth embodiment, after the welding is performed, a donut-shaped lid-type planar member 70 is attached so that the end surface of the planar member 8 is a flat surface and serves as a reference surface 9. The end surface of the lid-type planar member 70 becomes the reference surface 9. As a result, the positional relationship between the reflecting mirror 30 and the discharge lamp device is maintained, and therefore, when installed on the reflecting mirror 30, there is an effect that the discharge lamp device can be easily attached without rattling.
In the example of FIG. 13, the case where the structural member 5 is a box type having an electric circuit is shown. However, the structural member 5 is not limited to this and is a structural member having the shape of the connector 40 as shown in FIG. Alternatively, it may be a cylindrical structural member 5a as shown in FIGS.

As described above, according to the sixth embodiment, the opening 12a is formed in a slit shape connected from the cylindrical portion 13 to the end surface of the planar member 8, so that it is easy to insert a connection device and is fixed to the metal band 7. The connection of the plate 11 can be made easier.
In addition, a lid-type planar member 70 having an annular shape and a diameter larger than the diameter of the cylindrical portion 13 is attached to one end of the cylindrical portion 13, and the end surface of the lid-shaped planar member 70 is used as a reference surface 9. . For this reason, similarly to the above-described fourth embodiment, the annular lid-type planar member 70 has a flange shape larger than the cylindrical portion 13, so that it can be easily fixed to the reflecting mirror 30.

Embodiment 7 FIG.
FIG. 14 is an external perspective view showing the configuration of the discharge lamp device according to the seventh embodiment. In FIG. 13, parts that are the same as or equivalent to those in FIGS. 1 to 5 are given the same reference numerals, and descriptions thereof are omitted.
As in the first embodiment, the structural member 5 is a box type housing an electric circuit, and the point where the fixing

plates

11 and 7 are welded is exposed through the opening 12, so that, for example, for resistance welding It becomes easy to insert and weld the welding electrode.

In the seventh embodiment, after the welding is performed, the planar member 8 and the tubular portion 13 are covered with a shield member 80 formed of a metal plate material. In the example of FIG. 14, the two shield members 80 cover the planar member 8 and the cylindrical portion 13 so as to be sandwiched from the left and right, and the end surface of the shield member 80 becomes the reference surface 9. Since an electric circuit is housed inside the structural member 5, radiation noise due to the electric circuit may pass through the opening 12 and leak to the outside. Therefore, by covering the opening 12 using the conductive shield member 80, radiation noise leaking to the outside can be reduced.
In the example of FIG. 14, the shield member 80 is configured to cover the cylindrical portion 13 in which the opening portion 12 is formed and the planar member 8. It is not limited to. Moreover, although the case where the structural member 5 is a box type provided with an electric circuit has been shown, the present invention is not limited to this and may be a structural member having the shape of the connector 40 as shown in FIG. 7 to 12 may be a cylindrical structural member 5a, or a structural member 5 having a slit-shaped opening 12a as shown in FIG.

As described above, according to the seventh embodiment, since the discharge lamp device includes the shield member 80 that covers the opening 12, radiation noise that leaks to the outside can be reduced.

In the present invention, within the scope of the invention, any combination of the embodiments, any modification of any component in each embodiment, or omission of any component in each embodiment is possible. .

As described above, since the discharge lamp device according to the present invention shortens the overall length of the discharge lamp by bringing the light emitting sphere portion and the reference plane close to each other, it is suitable for use in an in-vehicle headlamp light source that requires downsizing. Yes.

1. Light emitting sphere, 2. Return wire, 3. Lead wire, 2a, 2b, 3a, 3b electrode, 4. Outer tube, 5, 5a structural member, 6. Insulating tube, 7. Metal band, 8. Plane member, 9. Reference plane, 10. Hole. Part, 11 fixing plate, 11a, 11b end, 11c hole, 11d convex part, 12, 12a opening part, 13 cylindrical part, 21, 22 welding electrode, 30 reflector, 40 connector (structural member), 41, 42 electrodes, 50 fastening members, 51 screws, 52 female screws, 60 cuts, 61 lock mechanism, 62 claws, 70 lid-type planar member, 80 shield member.

Claims

An outer tube containing and sealed the light emitting sphere,
A metal band fastened to one end of the outer tube;
A structural member provided on the opposite side of the light emitting sphere with respect to a reference plane for positioning the light emitting sphere in the lamp;
In a discharge lamp apparatus comprising: a fixing plate having one end fixed to the structural member, the other end connected to the metal band, and fixing the outer tube to the structural member;
The fixing plate is disposed inside the structural member,
The structural member has an opening portion on a side surface, and the position of the opening portion and the position of the connection portion of the metal band and the fixing plate are arranged to be aligned.
The discharge lamp device according to claim 1, wherein an electric circuit for lighting is housed inside the structural member.
The discharge lamp device according to claim 1, wherein a part of the structural member is cylindrical, and a reference surface is provided on an end surface of the cylindrical part.
The discharge lamp device according to claim 3, wherein a planar member having a diameter larger than the diameter of the cylindrical portion is provided at one end portion of the cylindrical portion, and an end surface of the planar member is used as a reference surface. .
The discharge lamp device according to claim 1, wherein the structural member is a connector.
The discharge lamp device according to claim 2, wherein the electric circuit is an igniter circuit.
The discharge lamp device according to claim 4, wherein the opening has a slit shape connected from the cylindrical portion to an end surface of the planar member.
The discharge lamp device according to claim 1, further comprising a shield member that covers the opening.
A first assembly step for assembling a first assembly member by assembling an outer tube that houses and seals the light emitting sphere and a metal band fastened to one end of the outer tube;
A second assembly step in which one end of the fixing plate is fixed inside the structural member provided with an opening on the side surface at a position facing the opening to form a second assembly member;
The outer tube one end side to which the metal band of the first assembly member is fastened is inserted into the structural member of the second assembly member to connect the position of the opening, the metal band and the fixing plate. And a connecting step of connecting the metal band and the fixing plate by inserting connection equipment through the opening and arranging the same.
10. The method of assembling a discharge lamp device according to claim 9, wherein the connection equipment is an electrode for electric welding or a laser beam for laser welding.