JPH0733947Y2 - Optical axis adjustment mechanism for automotive lighting - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an improvement of an optical axis adjusting mechanism of a lamp such as an automobile headlight.

[Prior Art] As is well known, a lighting device such as a headlight of an automobile is usually provided with an optical axis adjusting device for adjusting the optical axis at the time of lighting in vertical and horizontal directions.

As such an optical axis adjusting device, for example, in Japanese Utility Model Laid-Open No. 60-34029, a piston rod is connected to an adjusting screw for adjusting the inclination of a headlamp, and the piston rod is driven by a motor and the position of the piston rod is automatically adjusted. It has been disclosed that the optical axis can be adjusted by a single button operation by performing the automatic detection. However, in this motor type optical axis adjusting device, in addition to the drive motor, a ferrite core for detecting the position of the piston rod, a hollow coil, and a means for detecting the inductance change of the coil are required. Has the drawback of being extremely expensive.

A so-called screw type optical axis adjusting device which adjusts an adjusting screw by a manual operation is generally well known as an optical axis adjusting device having a relatively simple structure and low cost. This device fixes a female screw member to the vehicle body side, connects the vehicle body side and the lamp side by a male screw member (adjustment screw) screwed to the female screw member, and adjusts the interval between them by turning the adjusting screw. However, as an optical axis adjusting device which is low in cost and easy to operate, it has been generally used conventionally.

By the way, the above-mentioned optical axis adjusting device is mounted between the lamp and the vehicle body when the lamp is mounted on the vehicle body.In the past, however, the individual components were sequentially mounted on the vehicle body side, and then the lamp was mounted. There is. However, in this case, since it is necessary to individually assemble the fine parts to the vehicle body on the assembly line, the assembly workability is poor, and there is a problem in that it is not preferable for improving the productivity of the line.

Therefore, for example, as shown in FIG. 9, a female screw is attached to the grommet member 51 which is assembled to the vehicle body side member 59 with one touch.
51a is screwed, and the coil spring 52 is contracted between the washer 54 that comes into contact with the mounting flange 57 of the lamp 56 and the grommet member 51, and the adjustment screw is attached from the washer 54 side.
It is considered that by inserting 53 and screwing it into the female screw 51a of the grommet member 51, the above-mentioned components 51, 52, 53, 54 can be handled as one unit 50. Then, in this case, for example, the unitized optical axis adjusting mechanism 50 is attached to the vehicle body side member 59, and thereafter,
By inserting the head portion 53a of the adjusting screw 53 into the elongated hole provided in the mounting flange 57 of the lamp 56 and rotating the lamp 56, the lamp 56 and the optical axis adjusting device 50 can be easily installed as compared with the conventional one. It can be attached to the vehicle body side member 59.

[Problems to be Solved by the Invention] However, in the above-described conventional optical axis adjusting device 50, the adjusting screw 53 having a relatively long length is supported only by the short screw portion 51a with respect to the grommet member 51, and cantilevered. Since it is a support structure, the support of the adjusting screw 53 and the coil spring 52 is unstable and easily wobbles, and there is a problem in that the handleability during assembly work is not good.

The present invention has been made to solve the above-mentioned problems, and can be assembled as one unit body, and the optical axis adjusting mechanism of a vehicle lamp can be improved in handling during assembly work. The purpose is to provide.

[Means for Solving the Problems] Therefore, the present invention is directed to a grommet member mounted on the vehicle body side and a washer that is slidably fitted in the grommet member in the axial direction and abuts on the flange portion of the lamp. A member, a spring disposed between the washer member and the grommet member to urge the two members in a direction to separate them from each other, and a spring is inserted from the washer member side to the female screw portion of the grommet member. A unit body is constituted by an adjusting screw member to be screwed, and the washer member is provided with a guide pin for guiding the sliding movement of the washer member, while the grommet member is provided with a guide groove for inserting the guide pin. Is provided.

According to the present invention, the washer member is slidably fitted in the grommet member in the axial direction, and
Since the guide pin and the guide groove for guiding the sliding motion are provided, the washer member is stably supported in the sliding direction by the grommet member. Therefore, the adjusting screw member is supported on the grommet member not only on the female screw portion of the grommet member but also on the washer member side. The adjusting screw member and the spring can be stably supported, and the handleability during the assembling work can be improved.

[Embodiment] An embodiment of the present invention will be described below in detail with reference to the accompanying drawings.

As shown in FIG. 4, the headlamp 6 according to the present embodiment is provided with mounting flanges 7 for mounting the lamp 6 on the vehicle body side via the optical axis adjusting unit 1 at three locations on the left and right sides and the lower side. As shown in detail in FIG. 5, each mounting flange 7 has a large diameter hole 8a having a diameter larger than the head 3a of the adjusting screw (aiming screw) of the optical axis adjusting unit 1.
And an elongated hole-shaped mounting hole 8 having a small-diameter hole portion 8b having a diameter smaller than that of the head portion 3a, and the optical axis adjusting unit 1 is mounted in each of the mounting holes 8. There is. The left and right adjusting units 1, 1 adjust the optical axis in the horizontal direction, and the lower adjusting unit 1 adjusts the optical axis in the vertical direction.

As shown in FIGS. 1 and 2, the optical axis adjusting unit 1 includes a grommet member 10 that can be attached to a panel member on the vehicle body side with one touch, and a washer member 20 that abuts on a mounting flange 7 of a headlamp 6. , These two members 1
A spring 2 arranged between 0 and 20 for urging both members away from each other, and an aiming screw 3 inserted into the female screw portion 15 of the grommet member 10 by inserting the spring 2 from the washer member 20 side. It has and.

The washer member 20 is formed integrally with a flat plate-shaped receiving portion 21 that comes into contact with the mounting flange 7 and a rectangular tubular slide portion 22 that extends in a vertical direction from the receiving portion 21, and more preferably, the receiving portion 21. Aiming screw 3 at the center of part 21
A female screw portion 21a that is screwed with the male screw is provided. On the other hand, as is clear from FIG. 3, the grommet member
Designated by 10 are claw portions 11 and 11 fitted into mounting holes 9a (see FIG. 6) provided in the vehicle body side panel 9, a rectangular flange portion 12 abutting the vehicle body side panel 9, and the flange portion 12 From which a pair of flat plate-shaped guide plates 13 and a rectangular frame portion 14 arranged opposite to the rectangular flange portion 12 at the ends of the guide plates 13 and 13 are integrally formed, and the rectangular flange A female screw 15 for screwing the aiming screw 3 is screwed on the center of the portion 12 and the claw portions 11, 11.

The slide portion 22 of the washer member 20 includes a guide plate and an inner peripheral portion of the rectangular frame portion 14 of the grommet member 10.
It is adapted to be slidably fitted between 13 and 13, and the spring 2 and the slide portion 22 are sequentially inserted into the grommet member 20, and then the aiming screw 3
Is inserted into the inside of the spring 2 while being screwed into the female screw 21a from the washer member 20 side, and is screwed into the female screw portion 15 on the grommet member 10 side.
And 20 can be connected together to form a unit.

In this embodiment, guide pins 22a, 22a are provided at 180 ° opposite positions on the outer peripheral portion of the slide portion 22 of the washer member 20, while the guide plate 13 of the grommet member 10 has
Elongated hole-shaped guide grooves 13a are provided for guiding the guide pins 22a in a slidable manner. That is, the washer member 20 is slidably fitted in the grommet member 10 by the slide portion 22 in the axial direction,
Moreover, since this sliding operation is stably guided by the guide pins 22a, 22a and the guide grooves 13a, 13a, the washer member 20 is stably supported by the grommet member 10 in the sliding direction. Therefore, the aiming screw 3 is supported not only on the female screw portion 15 of the grommet member 10 but also on the washer member 20 side with respect to the grommet member 10, so that the cantilever support structure is different from the conventional one. As a result, the aiming screw 3 and the spring 2 can be stably supported without wobbling, and the handleability at the time of assembling the optical axis adjusting unit 1 and the lamp 6 can be improved.

Further, in the present embodiment, the rectangular frame portion 14 of the grommet member 10 is provided with a positioning rib 14a protruding by a predetermined length toward the washer member 20 side, and the rib 14a can be visually observed.
It can be preliminarily adjusted so that the tip of the is substantially flush with the mounting flange 7 of the lamp 6.

The procedure of adjusting the optical axis of the lamp 6 using the optical axis adjusting unit 1 configured as described above will be described.

First, after inserting the aiming screw head 3a of the optical axis adjusting unit 1 into the large diameter hole 8a of the mounting hole 8 from the rear side of the mounting flange 7 of the headlamp 6 (see FIG. 4),
By rotating the optical axis adjusting unit 1 relative to the lamp 6, the optical axis adjusting unit 1 is moved to the small diameter hole 8b.
It is slid to the side and fixed to the mounting flange 7. That is, as shown in FIG. 6, the receiving portion of the washer member 20.
The optical axis adjusting unit 1 is mounted on the mounting flange 7 with the receiving portion 21 and the aiming screw head 3a sandwiching the mounting flange 7 by pressing 21 toward the mounting flange 7 by the urging force of the spring 2. It is fixed at 7. In this case, since the optical axis adjusting mechanism 1 is configured as one unit body, it can be easily fixed to the mounting flange 7 with one touch.

After fixing the three optical axis adjusting units 1 to the three mounting holes 8 in this way, the claws 11 and 11 of the grommet member 10 are attached to the vehicle body side panel 9 for each adjusting unit 1.
The optical axis adjusting units 1, 1, 1 and the headlamp 6 are fixed to the vehicle body side panel 9 by fitting the optical axis adjusting units 1, 1, 1 into the mounting hole 9a. In this case, since the aiming screw 3 and the spring 2 of the optical axis adjusting unit 1 are stably supported by the grommet member 10, the grommet member 10
Does not wobble easily when it is fitted to the vehicle body side panel 9. Further, in this case, since the optical axis adjusting unit 1 is fixed to the lamp 6 side in advance, the optical axis adjusting unit 1 is assembled to the vehicle body side with one touch,
Assembling the lamp 6 and the optical axis adjusting mechanism 1 on the line, as compared with the conventional case where the optical axis adjusting unit is first assembled on the vehicle body side and then the lamp is fixed to the optical axis adjusting unit. Workability can be improved.

After that, the optical axis is adjusted in the left-right and up-down directions by adjusting the distance between the mounting flange 7 and the vehicle body side panel 9 while rotating the aiming screw 3. That is, the left and right adjusting units 1 and 1 adjust the optical axis in the horizontal direction, and the lower adjusting unit 1 adjusts the optical axis in the vertical direction. In this case, when the optical axis adjusting unit 1 is fixed to the mounting flange 7 of the lamp 6, the tip of the rib 14a of the grommet member 10 is flush with the surface side of the mounting flange 7 in advance (6th). (Refer to the figure), and by performing preliminary preliminary visual adjustment,
After that, fine adjustment becomes easier, and the optical axis adjustment work can be carried out smoothly.

Then, as shown in FIG. 7 or 8, the distance between the mounting flange 7 of the lamp 6 and the vehicle body panel 9 is finely adjusted by each optical axis adjusting unit 1. In this case, even when the spacing is adjusted to the open side (see FIG. 7) or to the maximum reduction side (see FIG. 8) from the time of the preliminary adjustment, the guide pin 22a is guided by the guide pin 22a. The position and dimensional relationship between the guide pin 22a and the guide groove 13a are set so that the adjustment work is not hindered by coming into contact with the end portion of the groove 13a. As a result of adjusting the distance between the mounting flange 7 and the vehicle body side panel 9 to the maximum reduction side (see FIG. 8), even when the tip end portion of the grommet member 10 abuts on the rear surface side of the mounting flange 7. , The guide plate 13 can be deformed and bent within the elastic range,
It is possible to absorb the displacement of the vehicle body panel 9 side.

As described above, according to the present embodiment, the aiming screw 3 and the spring 2 can be supported more stably, and the handleability of the optical axis adjusting unit 1 during the assembling work can be improved. You can do it.

[Brief description of drawings]

1 is a sectional view for explaining the sectional structure of an optical axis adjusting unit according to an embodiment of the present invention, and FIG. 2 is a sectional view taken along the line AA of FIG. 2, and FIG. 2 is a plan view of the optical axis adjusting unit. , Third
The figure is a perspective view of the grommet member of the optical axis adjusting unit,
FIG. 4 is a perspective view of the headlamp according to the above embodiment, and FIG.
FIG. 6 is a plan view of the mounting hole of the mounting flange of the headlamp, FIG. 6 is a longitudinal sectional view of the optical axis adjusting unit in the pre-adjustment state, and FIGS. 7 and 8 are the light beams after fine adjustment. FIG. 9 is a vertical cross-sectional explanatory view of the axis adjusting unit, and FIG. 9 is a partial cross-sectional explanatory view of an optical axis adjusting device and a lamp according to a conventional example. 1 ... Optical axis adjustment unit 1, 2 ... Spring, 3 ...
Aiming screw, 6 ... Headlamp, 7 ... Mounting flange, 9 ... Vehicle side panel, 10 ... Grommet member, 13 ... Guide plate, 13a ... Guide groove, 15 ...
Female thread, 20 ... Washer member, 22 ... Slide, 22
a …… Guide pin.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Bibliography Sho 58-47525 (JP, U) Rikai Hei 1-132441 (JP, U) Rikai 58-187608 (JP, U) Rikai 58- 147840 (JP, U) Actual opening 56-49001 (JP, U) Actual opening 55-163239 (JP, U) Actual opening Flat 2-69541 (JP, U) Actual opening 61-190602 (JP, U) Actual Development Sho 60-106838 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. A grommet member attached to a vehicle body, a washer member axially slidably fitted to the grommet member and abutting a flange portion of a lamp, the washer member and the grommet member. A unit which is disposed between the two members and urges them in a direction to separate them from each other, and an adjusting screw member which is inserted through the spring from the washer member side and screwed into the female screw portion of the grommet member. A vehicle body characterized in that a body is formed, and the washer member is provided with a guide pin for guiding a sliding movement of the washer member, while the grommet member is provided with a guide groove for inserting the guide pin. Optical axis adjustment mechanism for lighting equipment.