JPH10172302A - Bulb mounting structure for vehicle lighting - Google Patents

Abstract

(57) [Summary] In a vehicle lamp equipped with a discharge bulb, the same reflector can be commonly used regardless of the specification of the discharge bulb, and the same is applied to a lamp using a bulb other than the discharge bulb. The reflector can be commonly used. A discharge bulb (12) needs to be held at a predetermined position in a bulb insertion hole (14c) of a reflector (14), and this holding is performed by a socket fixture (18) attached to the reflector (14). The peripheral portion of the valve insertion hole 14c can be constituted by a simple cylindrical annular wall 14b. Thereby, the same reflector can be commonly used by preparing a socket fixture having a bulb mounting seat corresponding to a lamp having a different discharge bulb specification or a lamp using a bulb other than the discharge bulb. .

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bulb fixing structure for a vehicle lamp equipped with a discharge bulb.

[0002]

2. Description of the Related Art In general, a vehicular lamp provided with a discharge bulb has a bulb insertion hole formed at the rear top of the reflector, and a bulb holding portion is formed around the bulb insertion hole. Then, in a state where the discharge bulb is held at a predetermined position in the bulb insertion hole by the bulb holding portion, the discharge bulb is fixed to the reflector by a bulb fixing tool made of a wire spring.

[0003]

However, when such a valve fixing structure is employed, there are the following problems.

That is, in a lamp such as a headlamp or a fog lamp, a halogen bulb or the like is used as a light source in addition to a discharge bulb. It is not possible to attach a halogen bulb or the like to the bulb holder that has been set. The same applies to the opposite case. Even in the case of the same discharge bulb, there are a plurality of types having different structures due to differences in optical characteristics. Therefore, in such a case, it is necessary to form a part of the bulb holding portion in a different shape. Further, in the headlamp, it may be necessary to form a part of the bulb holding portion differently between the right light distribution lamp and the left light distribution lamp.

[0005] For these reasons, it has conventionally been necessary to produce a plurality of types of reflectors in accordance with the type of bulb or the right light distribution or the left light distribution, even though the lamp shapes are the same. . For this reason, a large mold cost is required, and parts management is also troublesome.
There is a problem.

The present invention has been made in view of such circumstances, and in a vehicle lamp provided with a discharge bulb, the same is applied regardless of the specification of the discharge bulb and the right light distribution or the left light distribution. It is an object of the present invention to provide a bulb fixing structure for a vehicle lamp, in which a common reflector can be used, and the same reflector can be commonly used for a lamp using a bulb other than a discharge bulb. It is.

[0007]

The present invention is not a conventional structure in which a discharge bulb is held by a bulb holding portion formed in a reflector, but a bulb holder is attached to a reflector, and a discharge bulb is provided by the bulb holder. The above purpose is achieved by adopting a structure that holds

That is, according to the present invention, as described in claim 1, a discharge bulb, a reflector having a bulb insertion hole formed at a rear top portion, and the discharge bulb held at a predetermined position in the bulb insertion hole And a bulb fixing device for fixing the discharge bulb to the reflector, wherein the holding of the discharge bulb at the predetermined position is performed by a bulb holding tool attached to the reflector. It is characterized by that.

If the "bulb holder" is configured to be able to hold the discharge bulb at a predetermined position in the bulb insertion hole, its specific shape and mounting structure to the reflector are not limited. There is no particular limitation.

In the "bulb fixing device", the discharge bulb can be fixed to the reflector (in the present invention, the valve holding device is not the reflector because the valve holding device is interposed). If possible, the specific configuration is not particularly limited,
A wire spring, a leaf spring or the like can be adopted.

[0011]

As described above, according to the present invention, the discharge bulb is held at a predetermined position in the bulb insertion hole of the reflector by the bulb holder attached to the reflector. Therefore, the peripheral portion of the valve insertion hole of the reflector can be formed in a simple shape such as a cylindrical shape.

Therefore, the same reflector can be used in common regardless of the specifications of the discharge bulb and whether the light distribution is right or left, and the same is applied to a lamp using a bulb other than the discharge bulb. Reflectors can be commonly used. On the other hand, in such a case, it is necessary to prepare a plurality of types of the above-mentioned valve holders, but since the valve holders are very inexpensive and small as compared with the reflector, the die cost is largely reduced as a whole. And component management can be facilitated.

Further, since the structure around the valve insertion hole of the reflector can be simplified, the reflector can be made of an inexpensive steel plate press instead of an expensive resin molded product such as FRP. Becomes

For example, as set forth in claim 6, the reflector is constituted by a metal reflector having an annular wall surrounding the valve insertion hole, and the valve holder is inscribed in the annular wall. In the case of a configuration including a cylindrical portion and a flange portion abutting on the rear surface of the annular wall,
The mounting of the valve holder to the reflector can be performed by an extremely simple mounting method, such as by deforming the annular wall and caulking the valve holder.

Although the specific shape of the "bulb holder" is not limited as described above, the discharge bulb generally includes a bulb body and a base portion supporting the bulb body. Therefore, for example, as described in claim 2, the valve holding tool,
It is possible to adopt a configuration comprising an annular member formed with an insertion hole through which the bulb body is inserted, and a bulb mounting seat for positioning the discharge bulb by contacting the base portion at a peripheral portion of the insertion hole. is there.

In this case, as described in claim 3, the "bulb fixture" is configured to be mounted on the bulb holder by rotating the "bulb fixture" about the optical axis of the discharge bulb. Fixing of the discharge bulb to the reflector (the bulb holder) by the bulb fixture is performed by pressing the base portion in contact with the valve mounting seat from behind with the bulb fixture. In addition, the discharge bulb can be securely mounted at a predetermined holding position without causing the discharge bulb to incline or rise, which tends to occur when the bulb is fixed by a conventional wire spring. This means that the discharge bulb has a light-emitting portion that is smaller and has a higher power than filaments such as halogen bulbs, so that even a slight inclination adversely affects the light distribution performance of the lamp. In view of this, it is extremely important.

As a specific configuration of the discharge bulb, there is known one in which three projections abutting on the bulb mounting seat are formed at substantially equal angular intervals about the optical axis on the front surface of the base. However, in a lamp equipped with such a discharge bulb, as described in claim 4, the bulb fixing device according to claim 3 includes three pressing portions that elastically press the base portion. The following functions and effects can be obtained by adopting a configuration in which the angular positions are shifted from the projections at substantially equal angular intervals around the optical axis and at the time of mounting on the valve holder. Obtainable.

That is, when an external force that inclines the discharge bulb acts on the discharge bulb fixed to the reflector (the bulb holding fixture) by the bulb fixture, the discharge bulb has three protrusions. In the configuration according to claim 4, since the pressing portions are located between the respective projecting portions, the pressing portions are located between the respective projecting portions. As a result, the elastic pressing force of the two pressing portions always acts as a reaction force, whereby the inclination of the discharge bulb can be prevented or minimized.

Further, in this case, as described in claim 5, each of the pressing portions is formed at the tip of each of three elastic arms extending from the main body of the valve fixture. For example, since the elastic limit of each of the pressing portions and the elastic arm portions can be set to a large value, permanent strain generated in the pressing portions and the elastic arm portions can be prevented or minimized beforehand. The above-mentioned valve fixture can be made excellent in durability to withstand repeated use.

[0020]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a side sectional view showing an entire structure of an embodiment of a valve fixing structure in a vehicle lamp according to the present invention, FIG. 2 is an exploded perspective view thereof, and FIG. FIG. 3 is a view in the direction of arrow III in FIG.

As shown in these figures, a vehicular lamp 10 according to the present embodiment is a round fog lamp provided with a discharge bulb 12, wherein the discharge bulb 12, a reflector 14, a lens 16, It has a socket fixture 18 (valve holder) and a set spring 20 (valve fixture).

The discharge bulb 12 has a bulb body 12A.
And a base portion 12B that supports the valve body 12A.
A flange portion 12Ba is formed in 2B.

The reflector 14 is a press-formed product made of a steel plate and has a paraboloidal reflection surface 14a having the optical axis Ax of the lamp as a central axis. Has been adhered to. This lens 1
A plurality of lens steps 16 s are formed on the inner surface of 6.

At the rear apex of the reflector 14, a cylindrical annular wall 14b centering on the optical axis Ax is formed so as to protrude rearward, whereby the valve insertion hole 14c is formed.
Is formed. The annular wall 14b is formed such that its rear end surface is located in a plane orthogonal to the optical axis Ax, and has a cutout 14d for positioning a socket fixture at the right end thereof. .

The socket fixture 18 is an annular member made of aluminum die-casting attached to the reflector, and has an insertion hole 18a through which the bulb main body 12A of the discharge bulb 12 is inserted, and a peripheral portion of the insertion hole 18a. Collar 1 of base 12B of discharge bulb 12
A bulb mounting seat 18b for positioning the discharge bulb 12 in contact with 2Ba is formed. The socket fixture 18 holds the discharge bulb 12 at a predetermined position in the bulb insertion hole 14c of the reflector 14. The predetermined position is such that the optical axis of the discharge bulb 12 coincides with the optical axis Ax and the discharge bulb 12 is positioned at the focal position of the reflector 14.
Are set as the positions where the light-emitting portions are matched.

On the front surface of the flange 12Ba of the base 12B of the discharge bulb 12, three projections 12Bb are formed at equal angular intervals about the optical axis Ax.
These three projections 12Bb are formed at a position directly below the optical axis Ax and at a position 120 ° to the left and right from the position directly below the optical axis Ax. A notch 12B for positioning the discharge bulb around the optical axis Ax is formed at the upper end of the flange 12Ba.
Further, a notch 12Bd for identifying a discharge bulb specification is formed slightly to the right of the upper end of the flange 12Ba.

Here, the detailed structure of the socket fixture 18 will be described.

FIG. 4 is a view showing a state where the set spring 20 is removed from FIG. FIGS. 5 and 6 are front views showing the socket fixture 18 as a single item (FIG. 1).
FIG. 7 and 8 are sectional views taken along lines VII-VII and VIII-VIII in FIG. 5, and FIG. 9 is a view taken in the direction of arrow IX in FIG.

As shown in these figures, the bulb mounting seat 18b of the socket fixture 18 abuts the three projections 12Bb of the discharge bulb 12 to position the discharge bulb 12 in the optical axis direction. Positioning annular surface 18c
A positioning peripheral wall 18d formed with a diameter slightly larger than the outer peripheral surface of the flange portion 12Ba of the discharge bulb 12 and positioning the discharge bulb 12 in the direction orthogonal to the optical axis; and a notch 12Bc of the discharge bulb 12 Key 18 for positioning the discharge bulb 12 about the optical axis by engaging
e, and an identification key 18f that engages with the notch 12Bd of the discharge bulb 12 to identify the specification of the discharge bulb 12.

The positioning peripheral wall 18d is formed so as to protrude rearwardly from a stepped, slightly larger annular surface 18g formed rearwardly of the positioning annular surface 18c. The discharge bulb 12
Of the socket fixture 18
Is set to be flush with the rear surface of the flange portion 12Ba of the discharge bulb 12 in a state of contact with the bulb mounting seat 18b. However, the positioning peripheral wall 18d
Are formed so as to be flush with the annular surface 18g at three places. The positions where these missing portions are formed are set at angular positions rotated clockwise by 40 ° with respect to the three projections 12Bb of the discharge bulb 12. At this time, the positioning key 18e is located at the left end of the upper right portion of the positioning peripheral wall 18d.

A projection 18h is formed at the right end of the upper left portion of the positioning peripheral wall 18d so as to project rearward from a general portion of the positioning peripheral wall 18d. As shown in FIG. 8, the protrusion 18h has a trapezoidal cross section in the circumferential direction. The slope 18s on the counterclockwise side extends only up to the rear surface of the positioning circumferential wall 18d. The clockwise slope 18t extends to the annular surface 18g and is set at a slightly larger inclination angle than the slope 18s.

The cylindrical portion 18 of the socket fixture 18
j is the outer diameter of the annular wall 14 of the reflector 14
The inner diameter is set to substantially the same value as the inner diameter dimension of b, and the outer peripheral surface is inscribedly fitted to the annular wall 14b. At the right end of the outer peripheral surface 18j, there is formed a positioning key 18k which engages with the notch 14d of the reflector 14 to position the socket fixture 18 around the optical axis Ax.

Further, a flange portion 18m having a rectangular cross section is formed at the rear of the outer peripheral surface of the cylindrical portion 18j of the socket fixture 18. The flange portion 18m is formed in a ring shape, but is missing over a predetermined width at a position directly above the optical axis Ax and at a position 120 ° left and right from the position directly above the optical axis Ax. At the central portion of each of the notches on the outer peripheral surface of the cylindrical portion 18j, a crimping groove portion 18n having a U-shaped cross section is formed to extend a predetermined length forward from the annular surface 18g side.

The mounting of the socket fixture 18 to the reflector 14 is performed by connecting the cylindrical portion 18j of the socket fixture 18 to the annular wall 1 of the reflector 14.
4b, while the flange portion 18m of the socket fixture 18 is pressed against the rear end surface of the annular wall 14b, a portion of the annular wall 14b opposite to the caulking groove portion 18n is formed. The end is the optical axis A
This is performed by protruding in the x-direction and caulking the caulking grooves 18n, and forming caulking portions 14e at three places on the annular wall 14b.

As shown in FIG. 9, the front end face of each of the three portions constituting the flange portion 18m of the socket fixture 18 located on the clockwise side of each of the notched portions is formed by the flange portion 18m. A stopper plane 18p which is one step lower than the front end face of the general part, and a tapered surface 18 which recedes from the stopper plane 18p toward the above-mentioned missing portion.
q.

Next, the detailed structure of the set spring 20 will be described.

FIG. 10 is a front view (a view in the direction of arrow III in FIG. 1) showing the set spring 20 as a single item.
1 is a sectional view taken along line XI-XI in FIG. FIG.
FIG. 12 is a view as viewed in the direction of the arrow XII in FIG. 11.

As shown in these figures, the set spring 20 is an annular member obtained by subjecting a plate-shaped spring material to machining such as press working, and is rotated clockwise to form the socket fixture 18. The base portion 12B of the discharge bulb 12
Is pressed from the rear.

The above-mentioned set spring 20 is provided on the main body 20.
A and three elastic arm portions 20B and pressing portions 20C.

The main body 20A has an annular flat surface 20Aa.
And a cylindrical portion 20Ab bent forward from the outer peripheral end of the annular flat portion 20Aa. The cylindrical portion 20Ab is set to have a slightly larger outer diameter than the flange portion 18m of the socket fixture 18, and
At its front end, three engaging portions 20Ac that engage with the outer peripheral front end of the flange portion 18m are formed at equal angular intervals about the optical axis Ax. As shown in FIG. 12, each of the engagement portions 20Ac is formed by plastically deforming the front end of the cylindrical portion 20Ab toward the optical axis Ax, and has slope portions 20Ad at both ends. Are formed.

As shown in FIG. 10, the three elastic arms 20B are formed so as to extend in the counterclockwise direction from the inner peripheral portion of the annular flat portion 20Aa. The elastic arm portion 20B is formed so as to protrude forward in a curved shape at a distal end portion thereof. The three elastic arms 20B and the pressing part 2
0C are all set in the same shape, and are formed at equal angular intervals around the optical axis Ax.

Each of the elastic arm portions 20B is formed by forming an arc-shaped slit in the annular flat portion 20Aa and cutting and raising an inner portion thereof toward the front. At this time, each of the elastic arm portions 20B is bent at its base end, and its bending line L
Is set to a line in which the inner peripheral end is displaced clockwise in the radial direction of the optical axis Ax (a line inclined by about 60 ° with respect to the radial direction).

Each of the pressing portions 20C has an arc-shaped cross section in the circumferential direction. The inner peripheral end of the pressing portion 20C protrudes more toward the optical axis Ax than the inner peripheral end of each of the elastic arm portions 20B. It is configured. Thus, as shown in FIGS. 3 and 4, each of the pressing portions 20C comes into sliding contact with the outer peripheral surface of the cylindrical portion 12Be of the base portion 12B of the discharge bulb 12. Each of the elastic arms 20
The inner peripheral end of the pin B does not interfere with a pair of pins 12Bf formed on the outer peripheral surface of the cylindrical portion 12Be.
The diameter is set slightly larger than the distance between the tip portions of 2Bf.

The mounting of the set spring 20 to the socket fixture 18 is performed as follows.

That is, as shown in FIG. 4, each engaging portion 20Ac of the cylindrical portion 20Ab of the set spring 20 is aligned with each notch of the flange portion 18m of the socket fixture 18, and the three After the pressing portion 20C is brought into contact with the rear surface of the flange portion 12Ba of the discharge bulb 12 and the rear end surface of the positioning peripheral wall 18d of the socket fixture 18, the set spring 20 is rotated clockwise. Due to this rotation, each of the engagement portions 20Ac rides on the stopper plane 18p along the tapered surface 18q (see FIG. 9) of the flange portion 18m, so that the main body portion 20A of the set spring 20 is displaced forward. Accordingly, each of the elastic arm portions 20B is elastically deformed, and the pressing force of the pressing portion 20C at the distal end is increased.

At this time, as shown in FIG. 8, one pressing portion 20C is brought into contact with the rear end surface of the positioning peripheral wall 18d of the socket fixture 18 (and the rear surface of the flange 12Ba of the discharge bulb 12). 18h from the contact state
And comes into contact with only the rear surface of the flange portion 12Ba of the discharge bulb 12. That is, at this time, the pressing portion 20C floats from the annular surface 18g of the socket fixture 18. Thus, the pressing function of the pressing portion 20C against the discharge bulb 12 is sufficiently exhibited. The other two pressing portions 20C are connected to the socket fixture 18.
From the rear end surface of the positioning peripheral wall 18d (and the rear surface of the flange portion 12Ba of the discharge bulb 12) to the state where it is in contact with only the rear surface of the flange portion 12Ba of the discharge bulb 12 as it is.

The set spring 20 is prevented from rotating at a position where each engaging portion 20Ac abuts on a clockwise side wall portion 18r of the stopper plane 18p (see FIG. 9) of the socket fixture 18. Thereby, positioning in the rotation direction at the time of mounting is performed. As shown in FIG. 12, since the inclined portions 20Ad are formed at both ends of the engaging portions 20Ac, the engaging portions 20Ac are formed at the time of the rotation.
Can be smoothly slid along the tapered surface 18q of the flange portion 18m to easily ride on the stopper plane 18p.

As shown in FIG. 4, each engaging portion 20Ac of the set spring 20 is connected to the socket fixture 18
In the state where it is aligned with each missing portion of the flange portion 18m, the three pressing portions 20C of the set spring 20
Although it is at the same angular position as the three projections 12Bb of the discharge bulb 12, when the set spring 20 is rotated clockwise to complete the mounting on the socket fixture 18, as shown in FIG. Each pressing part 20C
Is 40 degrees clockwise with respect to each of the protrusions 12Bb.
At the angular position shifted by °, it comes into contact with the flange portion 12Ba of the discharge bulb 12.

As described in detail above, in the present embodiment, the holding of the discharge bulb 12 at a predetermined position in the bulb insertion hole 14c of the reflector 14
The reflector 14 is formed by a simple cylindrical annular wall 14b around the valve insertion hole 14c.

Therefore, the same reflector can be commonly used regardless of the specifications of the discharge bulb, and the same reflector can be commonly used for lamps using bulbs other than the discharge bulb.

For example, the flange 12 of the discharge bulb 12
The notch 12Bd formed in Ba is for identifying the specification of the discharge bulb, and the angle of formation of the notch 12Bd differs depending on the difference in the optical characteristics of the discharge bulb. In this embodiment, in order to engage with the notch 12Bd of the discharge bulb 12, the identification key 18f of the socket fixture 18 is located on the right side of the positioning key 18e for positioning the discharge bulb 12 around the optical axis. However, when a discharge bulb having a notch formed at a different angular position from the discharge bulb 12 is mounted, a socket having an identification key formed at an angular position corresponding to the formed angular position of the notch. What is necessary is just to use a fixture.

In the case where a bulb (such as a halogen bulb) other than the discharge bulb 12 is used, a socket fixture in which the configuration of the bulb mounting seat 18b of the socket fixture 18 of the present embodiment is appropriately changed is used. I just need.

In this case, however, it is necessary to prepare a plurality of types of socket fixtures. However, since socket fixtures are very inexpensive and small as compared with reflectors, the cost of the mold as a whole is greatly reduced. And component management can be facilitated.

Further, since the structure around the valve insertion hole of the reflector can be simplified, the reflector can be constituted by the above-mentioned reflector 14 formed of a low-priced press-formed steel plate. Thus, in the present embodiment, the mounting of the socket fixture 18 to the reflector 14 is performed by the annular wall 14 of the reflector 14.
This can be done by an extremely simple mounting method, such as by deforming b and fixing it to the socket fixture 18 by caulking.

Further, in the present embodiment, the socket fixture 18 has an insertion hole 18a through which the bulb main body 12B of the discharge bulb 12 is inserted, and the insertion hole 18a.
a at the periphery of the base 12 of the discharge bulb 12
B, and a bulb mounting seat 18b for positioning the discharge bulb 12 in contact with B. The set spring 20 is rotated by the set spring 20 about the optical axis Ax of the lamp. An annular member configured to be attached to the fixture 18,
Further, the fixing of the discharge bulb 12 to the socket fixture 18 by the set spring 20 is performed by pressing the base portion 12B in contact with the bulb mounting seat 18b from behind with the set spring 20. Therefore, the discharge bulb 12 can be surely mounted at a predetermined holding position without causing the discharge bulb 12 to be lifted and inclined, which is likely to occur when the bulb is fixed by a conventional wire spring. . This means that the discharge bulb has a light-emitting portion that is smaller and has a higher power than filaments such as halogen bulbs, so that even a slight inclination adversely affects the light distribution performance of the lamp. In view of this, it is extremely important.

The base 12 of the discharge bulb 12
On the front surface of B, three protrusions 12Bb are formed at equal angular intervals around the optical axis Ax. However, the set spring 20 of the present embodiment elastically connects the base 12B of the discharge bulb 12 to the base. Three pressing parts 20C to press against
Are formed at equal angular intervals around the optical axis Ax, and are shifted from the respective projections 12Bb of the discharge bulb 12 at the time of attachment to the socket fixture 18, so that The following operational effects can be obtained.

That is, when an external force is applied to the discharge bulb 12 fixed to the socket fixture 18 by the set spring 20 so as to incline the discharge bulb 12, the discharge bulb 12 is connected to the three projections. Although it is attempted to incline using a straight line connecting two protrusions of the portion 12Bb as the tilt axis, since the pressing portions 20C are located between the respective protrusions 12Bb, two pressings are always applied to the external force. The elastic pressing force exerted by the portion acts as a reaction force, whereby the inclination of the discharge bulb 12 can be prevented or minimized.

Further, since each of the pressing portions 20C is formed at the tip of each of three elastic arms 20B extending from the main body of the set spring 20, each of the pressing portions 20C and the elastic arms 20B is formed. Can be set to a large value. Therefore, it is possible to prevent or minimize the permanent strain generated in each of the pressing portion 20C and the elastic arm portion 20B beforehand. It can have excellent durability to withstand repeated use.

In the above-described embodiment, the fog lamp has been described as a vehicle lamp. However, other lamps such as a headlamp employ the same configuration as that of the above-described embodiment, so that the same operation and effect as those of the above-described embodiment can be obtained. Can be obtained. In particular, in the case of a headlamp, it is sometimes necessary to form a part of the bulb holding portion in a different shape between the right light distribution lamp and the left light distribution lamp. By preparing two types of socket fixtures, a common reflector can be used.

[Brief description of the drawings]

FIG. 1 is a side cross-sectional view showing the overall configuration of one embodiment of a bulb fixing structure in a vehicle lamp according to the present invention.

FIG. 2 is an exploded perspective view showing the overall configuration of the embodiment.

FIG. 3 is a view in the direction of arrow III in FIG. 1;

FIG. 4 is a view showing a state where a set spring is removed from FIG. 3;

FIG. 5 is a front view showing the socket fixture of the embodiment as a single item (a view seen in the direction of arrow III in FIG. 1).

FIG. 6 is a rear view showing the socket fixture as a single item;

FIG. 7 is a sectional view taken along the line VII-VII of FIG. 5;

8 is a sectional view taken along line VIII-VIII in FIG.

9 is a view taken in the direction of the arrow IX in FIG. 5;

FIG. 10 is a front view showing the set spring of the embodiment as a single item (a view seen in the direction of arrow III in FIG. 1);

11 is a sectional view taken along line XI-XI in FIG.

FIG. 12 is a view taken in the direction of the arrow XII in FIG. 11;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Headlamp (vehicle lamp) 12 Discharge bulb 12A Valve main body 12B Base part 12Ba Flange part 12Bb Projection part 12Bc, 12Bd Notch part 12Be Cylindrical part 12Bf Pin 14 Reflector 14b Annular wall 14c Valve insertion hole 14d Notch part 14e 16 Lens 18 Socket Fixture (Valve Holder) 18a Insertion Hole 18b Valve Mounting Seat 18c Positioning Annular Surface 18d Positioning Peripheral Wall 18e Positioning Key 18f Identification Key 18g Annular Surface 18h Protrusion 18j Tubular Part 18k Positioning Key 18m Flange 18n Groove 18p Stopper plane 18q Tapered surface 18r Side wall 18s, 18t Slope 20 Set spring (valve fixture) 20A Body 20Aa Annular plane 20Ab Cylindrical 20Ac Engagement 0Ad inclined surface portion 20B resilient arm portion 20C pressing part Ax optical axis L fold line

Claims (6)

[Claims] 1. A discharge bulb, a reflector having a bulb insertion hole formed at a rear top portion, and a valve fixture for fixing the discharge bulb held at a predetermined position in the bulb insertion hole to the reflector. A bulb mounting structure for a vehicle lamp, wherein the holding of the discharge bulb at the predetermined position is performed by a bulb holder attached to the reflector. Mounting structure. 2. The discharge bulb comprises a bulb main body and a base portion supporting the bulb main body, wherein the bulb holder has an insertion hole through which the valve main body is inserted, and a peripheral portion of the insertion hole. The bulb mounting structure for a vehicle lamp according to claim 1, comprising an annular member formed with a bulb mounting seat for abutting a base portion to position the discharge bulb. 3. The valve fixture is configured to be mounted on the bulb holder by rotating the bulb fixture about the optical axis of the discharge bulb. 3. The discharge bulb is fixed to the reflector by pressing the base portion in contact with the bulb mounting seat from behind with the bulb fixture. A bulb mounting structure in the vehicle lamp according to the above. 4. A front surface of the base portion, wherein three projections abutting on the valve mounting seat are formed at substantially equal angular intervals about the optical axis. Are formed at substantially equal angular intervals around the optical axis, and are offset from the respective projections when mounted on the bulb holder. The valve mounting structure for a vehicle lamp according to claim 3, wherein 5. The vehicular lamp according to claim 4, wherein each of the pressing portions is formed at a tip end of each of three elastic arms extending from a main body of the bulb fixing device. Valve mounting structure. 6. The reflector comprises a metal reflector having an annular wall surrounding the valve insertion hole, wherein the valve holder has a tubular portion inscribed in the annular wall, and a rear surface of the annular wall. The valve holder is attached to the reflector by deforming the annular wall and caulking and fixing the valve holder to the valve holder. The bulb mounting structure for a vehicle lamp according to any one of claims 1 to 5, characterized in that: