JPH0822703A - Vehicular lighting fixture with optic axis adjuster - Google Patents

Abstract

PURPOSE:To improve both the assembling property and watertightness. CONSTITUTION:Each of watertight portions 3, 4 is monolithically formed in a portion where each of resinous adjusting screws 2, 102 or resinous lamp housing 10 is abutted against the other. Consequently, watertightness can be secured between the lamp housing 10 and each of the adjusting screws 2, 102 while the adjusting screws 2, 102 can be incorporated in the lamp housing 10 merely by incorporating the adjusting screws 2,102 in the lamp housing 10, so that the assembling property ca be improved. Moreover, the face with which each one of the watertight portions 3, 4 is abutted again the other can be made large compared with an O ring by the watertight portions 3, 4 so that waterproofness in the lighting fixture with its optic axis adjuster can be improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicular lamp such as a headlamp or fog lamp of an automobile of a movable reflector type, which tilts the reflector by rotating an adjusting screw. The present invention relates to a vehicular lamp equipped with an optical axis adjusting device for adjusting an optical axis, in particular, the workability of assembling an adjusting screw to a lamp housing via a waterproof mechanism is improved, and the waterproof property between the lamp housing and the adjusting screw is improved. The present invention relates to a vehicle lamp equipped with an improved optical axis adjusting device.

[0002]

2. Description of the Related Art A vehicular lamp equipped with a conventional optical axis adjusting device of this type will be described with reference to FIGS. This example describes a movable reflector headlamp for a vehicle.

In the drawing, reference numeral 1 denotes a movable headlamp of a reflector equipped with an optical axis adjusting device. In this automotive headlamp 1, a front lens 11 is arranged in a front opening of a resin lamp housing 10. The front lens 11 and the lamp housing 10 allow a lamp chamber 12 to be provided.
Is defined and formed. A movable reflector 13 is disposed in the lamp chamber 12, and the movable reflector 13 is rotatably attached to the lamp housing 10 by a pivot bearing mechanism 14. On the front surface side of the movable reflector 13, there is provided a reflecting surface 18 for reflecting the light from the light source bulb 15 described later to the front lens 11 side. A light source bulb 15 is provided on the reflecting surface 18 side of the movable reflector 13, and the light source bulb 15 is arranged in the lamp chamber 12. An optical axis adjusting device 16 for the vertical direction and an optical axis adjusting device 1 for the horizontal direction are provided on the lamp housing 10 and the movable reflector 13.
7 are equipped respectively. By operating the optical axis adjusting device 16 for the vertical direction or the optical axis adjusting device 17 for the horizontal direction, the movable reflector 13 (including the light source bulb 15) moves vertically with respect to the lamp housing 10. The optical axis is adjusted by rotating in the left-right direction.

Next, the vertical optical axis adjusting device 16 of the above optical axis adjusting devices will be described. First, a mounting boss 100 is integrally provided outside a portion of the lamp housing 10 where the optical axis adjusting device 16 for the vertical direction is mounted, and a circular insertion hole is formed in the center of the mounting boss 100. 101 is provided. An adjusting screw 102 is rotatably mounted in the insertion hole 101 by a push nut, a wave washer 103 or the like, and is immovable in the axial direction of the adjusting screw 102. On the outer surface of the mounting boss portion 100, there are two stepped recesses 10
4 is provided, and an O-ring 105 is set in the recess 104 having a small diameter. A flange portion 106 is integrally provided at a substantially middle portion of the adjusting screw 102, and the flange portion 106 is used for the O-ring 1.
By abutting on 05, the water tightness between the lamp housing 10 and the adjusting screw 102 is maintained. On the other hand, on the rear surface of the movable reflector 13, a mounting portion 130 is integrally provided at a position where the optical axis adjusting device 16 for the vertical direction is mounted. This mounting part 13
Reference numeral 0 includes a leg portion 131 that is integrally projected from the back surface of the reflector 13, and a spherical concave surface 132 that is provided at the tip of the leg portion 131. A screw mounting 133 is rotatably mounted on the spherical concave surface 132 of the mounting portion 130. The adjusting screw 102 is screwed into the screw mounting 133. When the adjusting screw 102 is rotated, the screw mounting 133 moves along the axial direction of the adjusting screw 102 due to the screw feeding action, and the reflector 13 tilts in the vertical direction accordingly. In addition, the adjusting screw 102 described above.
In addition to manual rotation, the optical axis adjustment device 1 for vertical
6 may be mechanically performed by a motor drive mechanism (not shown). The configuration and operation of the above-mentioned optical axis adjusting device 17 for the left-right direction are substantially the same as the configuration and operation of the optical-axis adjusting device 16 for the vertical direction.

[0005]

However, in the vehicular lamp including the above-described conventional optical axis adjusting device, the flange portion 106 of the adjusting screw 102 abuts on the O-ring 105 set in the lamp housing 10. , Lamp housing 10 and adjusting screw 1
It is configured so as to maintain the water tightness with respect to No. 02. Therefore, in the conventional vehicle lamp,
It is necessary to set the O-ring 105 on the lamp housing 10, and then to assemble the adjusting screw 102 to the lamp housing 10 while pressing the O-ring 105, which causes a problem that the assembling workability is complicated.

An object of the present invention is to provide an optical axis adjusting device in which the workability of assembling an adjusting screw into a lamp housing via a waterproof mechanism is improved, and the waterproof property between the lamp housing and the adjusting screw is improved. It is to provide a lighting device for a vehicle.

[0007]

In order to achieve the above-mentioned object, the present invention has an adjusting screw formed of a resin, and a portion of the adjusting screw made of resin contacting the lamp housing is provided with a lamp housing. It is characterized in that a watertight portion for ensuring watertightness between the and is integrally provided.

Further, according to the present invention, the lamp housing is made of resin, and a watertight portion for ensuring watertightness between the adjust screw and the adjust screw is integrated in a portion of the resin lamp housing where the adjust screw abuts. It is provided in.

[0009]

According to the present invention, since the watertight portion as the waterproof mechanism is integrally provided on the resin adjusting screw or the resin lamp housing, the lamp housing and the adjusting screw can be simply assembled to the lamp housing. The watertightness between them is secured, and the adjusting screw is assembled to the lamp housing. Therefore, as compared with the conventional vehicular lamp in which the O-ring is set on the lamp housing, and the adjusting screw is assembled to the lamp housing while pressing the O-ring, the assembling property of the present invention is improved.

Further, according to the present invention, the watertight portion integrally provided on the resin adjusting screw or the resin lamp housing makes the contact surface of the watertight portion with the counterpart larger than the O-ring. Therefore, the waterproof property between the lamp housing and the adjusting screw is improved accordingly.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Two of the embodiments of the vehicular lamp equipped with the optical axis adjusting device of the present invention will be described below with reference to FIGS. 1 and 2 show a first embodiment of a vehicular lamp equipped with the optical axis adjusting device of the present invention. This example describes a movable reflector headlamp for a vehicle. In the figure, the same reference numerals as those in FIGS. 5 and 6 indicate the same components.

In FIGS. 1 and 2, reference numeral 2 is an adjusting screw. The adjusting screw 2 is made of resin, for example, synthetic resin such as polyamide (PA) with glass, and has an operating portion 20 at one end, a flange portion 21 at an intermediate portion, and a screw portion 22 at the other end. It is molded integrally. A ring-shaped convex portion or a plurality of convex portions 23 are integrally provided on the surface of the flange portion 21 on the screw portion 22 side.

In FIGS. 1 and 2, reference numeral 3 is a watertight portion as a waterproof mechanism. The watertight portion 3 is made of an elastomer, for example, a thermoplastic elastomer (thermoplastic elastomer (TPE)), and is integrally provided in an annular shape on the flange portion 21 and the convex portion 23 of the adjusting screw 2. The watertight portion 3 is formed by first molding only the adjusting screw 2 and setting the primary molding adjusting screw 2 in a secondary molding die. The flange portion 21 and the convex portion 23 of the adjusting screw 2 are annularly formed by an elastomer. It is integrally molded. When the first-molded adjusting screw 2 is set in the secondary molding die, the flange 21 of the adjusting screw 2 and the convex portion 23 of the watertight portion 3 of the convex portion 23 are molded by the secondary die. A void is formed. The void watertight portion 3 is formed of an elastomer. The height of the watertight portion 3 is set so that the watertight portion 3 contacts the bottom of the small diameter recess 104 before the flange portion 21 contacts the bottom of the large diameter recess 104.

Since the vehicular lamp equipped with the optical axis adjusting device of the present invention in this embodiment has the above-mentioned structure, the adjusting screw 2 is inserted into the insertion hole 101 of the lamp housing 10 to form the watertight portion 3. A small-diameter recess 10
4 and presses the flange portion 21 into the concave portion 10 having a large diameter.
The adjustment screw 2 is attached to the lamp housing 10 so as to be rotatable and immovable in the axial direction by a push nut, a wave washer 103, or the like 103 by contacting the bottom of the lamp housing 10 with the adjustment screw 2. The watertightness between them is ensured, and the adjusting screw 2 is assembled to the lamp housing 10. Therefore, as compared with the conventional vehicular lamp in which the O-ring is set in the lamp housing and the adjusting screw is assembled to the lamp housing while pressing the O-ring, the vehicular lamp according to the present invention has improved assembling property.

In the vehicular lamp of the present invention in this embodiment, the watertight portion 3 provided integrally with the adjusting screw 2 made of resin has an O-ring on the contact surface of the watertight portion 3 with the lamp housing 10. The water resistance between the lamp housing 10 and the adjusting screw 2 is improved accordingly.

Further, in this embodiment, the watertight portion 3
Since the convex portion 23 integrated with the flange portion 21 is disposed on the core of the, the rigidity of the watertight portion 3 can be increased.

By rotating the operating portion 20 of the adjusting screw 2 with a driver, a hexagonal tool or the like, the reflector 13 can be tilted vertically or horizontally.

FIGS. 3 and 4 show a second embodiment of a vehicular lamp equipped with the optical axis adjusting device of the present invention. In this example, similarly to the first embodiment, a movable reflector headlamp for a vehicle will be described. 1 and 2 in the figure
The same reference numerals as those in FIGS. 5 and 6 denote the same components.

In FIGS. 3 and 4, reference numeral 4 is a watertight portion as a waterproof mechanism. The watertight portion 4 is made of an elastomer, for example, a thermoplastic elastomer (thermoplastic elastomer (TPE)), and is integrally provided annularly in the small-diameter recess 104 of the resin lamp housing 10. The height of the watertight portion 4 is adjusted by the adjusting screw 10
The second flange 106 contacts the watertight portion 4 before contacting the bottom of the large-diameter recess 104.

Since the vehicular lamp equipped with the optical axis adjusting device of the present invention in this embodiment has the above-mentioned structure, the adjusting screw 102 is attached to the lamp housing 1.
0 through the insertion hole 101, the flange portion 106 is brought into pressure contact with the watertight portion and is brought into contact with the bottom of the large-diameter recess 104,
Adjust the adjust screw 210 to the lamp housing 1
0 is mounted rotatably and axially immovable by a push nut, wave washer 103, etc., so that the lamp housing 10 and the adjusting screw 1
The watertightness with respect to No. 02 is secured, and the adjusting screw 102 is assembled to the lamp housing 10. Therefore, set the O-ring in the lamp housing,
Compared with the conventional vehicular lamp in which the adjusting screw is mounted in the lamp housing while pressing the O-ring, the vehicular lamp of the present invention has improved assembling property.

Further, in the vehicular lamp of the present invention in this embodiment, the watertight portion 4 provided integrally with the resin lamp housing 10 makes contact with the flange portion 106 of the adjusting screw 102 of the watertight portion 4. The surface can be made larger than the O-ring, and the waterproof property between the lamp housing 10 and the adjusting screw 102 can be improved accordingly.

Then, the reflector 13 can be tilted vertically or horizontally by rotating the operating portion at one end of the adjusting screw 102 with a screwdriver, a hexagonal tool or the like.

[0023]

As described above, in the optical axis adjusting device for a vehicle headlamp of the present invention, the workability of assembling the adjusting screw to the lamp housing through the waterproof mechanism is improved, and the lamp housing and the adjusting screw are improved. The waterproof property between and is improved.

[Brief description of drawings]

FIG. 1 is a partial vertical cross-sectional view showing a first embodiment of a vehicular lamp including an optical axis adjusting device of the present invention.

FIG. 2 is a partially enlarged sectional view of a flange portion and a watertight portion of the adjusting screw.

FIG. 3 is a partial vertical cross-sectional view showing a second embodiment of a vehicular lamp including the optical axis adjusting device of the present invention.

FIG. 4 is a partially enlarged sectional view of a mounting boss portion and a watertight portion of the lamp housing.

FIG. 5 is a front view showing a vehicular lamp equipped with a conventional optical axis adjusting device.

6 is a sectional view taken along line VI-VI in FIG.

[Explanation of symbols]

1 ... Automotive headlight, 10 ... Lamp housing, 11 ...
Front lens, 12 ... Lamp room, 13 ... Movable reflector, 14
... Pivot mechanism, 15 ... Light source bulb, 16 ... Vertical optical axis adjusting device, 17 ... Horizontal optical axis adjusting device, 1
8 ... Reflective surface, 100 ... Mounting boss, 101 ... Insertion hole, 1
Reference numeral 02 ... Adjusting screw, 103 ... Push nut, 104 ... Recessed portion, 106 ... Flange portion, 130 ... Mounting portion, 133 ... Screw mounting, 2 ... Adjusting screw, 20 ... Operating portion, 21 ... Flange portion, 22
... screw part, 23 ... convex part, 3 and 4 ... watertight part.

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[Procedure amendment]

[Submission date] June 6, 1995

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0004

[Correction method] Change

[Correction content]

Next, the vertical optical axis adjusting device 16 of the above optical axis adjusting devices will be described. First, a mounting boss 100 is integrally provided outside a portion of the lamp housing 10 where the optical axis adjusting device 16 for the vertical direction is mounted, and a circular insertion hole is formed in the center of the mounting boss 100. 101 is provided. An adjusting screw 102 is rotatably mounted in the insertion hole 101 by a push nut, a wave washer 103 or the like, and is immovable in the axial direction of the adjusting screw 102. On the outer surface of the mounting boss portion 100, there are two stepped recesses 10
4 is provided, and an O-ring 105 is set in the recess 104 having a small diameter. A flange portion 106 is integrally provided at a substantially middle portion of the adjusting screw 102, and the flange portion 106 is used for the O-ring 1.
By abutting on 05, the water tightness between the lamp housing 10 and the adjusting screw 102 is maintained. On the other hand, on the rear surface of the movable reflector 13, a mounting portion 130 is integrally provided at a position where the optical axis adjusting device 16 for the vertical direction is mounted. This mounting part 13
Reference numeral 0 includes a leg portion 131 that is integrally projected from the back surface of the reflector 13, and a spherical concave surface 132 that is provided at the tip of the leg portion 131. Screw mounting 133 is mounted rotating impossible to the sphere concave 132 of the mounting portion 130. The adjusting screw 102 is screwed into the screw mounting 133.
When the adjusting screw 102 is rotated, the screw mounting 133 moves along the axial direction of the adjusting screw 102 due to the screw feeding action, and the reflector 13 tilts in the vertical direction accordingly. In addition, the adjusting screw 102 described above.
In addition to manual rotation, the optical axis adjustment device 1 for vertical
6 may be mechanically performed by a motor drive mechanism (not shown). The configuration and operation of the above-mentioned optical axis adjusting device 17 for the left-right direction are substantially the same as the configuration and operation of the above-described optical axis adjusting device 16 for the vertical direction.

Claims (2)

[Claims] 1. A lamp housing and a lens define a lamp chamber, a reflector is tiltably disposed in the lamp chamber, and an adjusting screw is mounted on the lamp housing rotatably and axially immovably. Then, a screw mounting is attached to the reflector, and the adjusting screw is screwed into the screw mounting,
By rotating the adjusting screw, the vehicular lamp including an optical axis adjusting device that tilts the reflector to adjust the optical axis, wherein the adjusting screw is made of resin, and is provided at a position where the adjusting screw is brought into contact with the lamp housing. A vehicular lamp equipped with an optical axis adjusting device, wherein a watertight portion for ensuring watertightness with the lamp housing is integrally provided. 2. A lamp chamber is defined by a lamp housing and a lens, a reflector is tiltably disposed in the lamp chamber, and an adjust screw is rotatably and axially immovably mounted on the lamp housing. Then, a screw mounting is attached to the reflector, and the adjusting screw is screwed into the screw mounting,
By rotating the adjusting screw, the vehicular lamp including an optical axis adjusting device that tilts the reflector to adjust the optical axis, wherein the lamp housing is made of a resin, and the adjusting screw is provided at a position where the adjusting screw abuts. A vehicular lamp equipped with an optical axis adjusting device, wherein a watertight portion for ensuring watertightness with the adjusting screw is integrally provided.