JPS5842187Y2 - Automobile headlight angle adjustment mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an angle adjustment mechanism for an automobile headlamp that has a simple structure and allows smooth and reliable optical axis adjustment of the headlamp.

As is well known, the headlight attached to an automobile is supported at three points so that the optical axis can be adjusted when adjusting or replacing the headlight.

In other words, in this three-point support structure, one point is rotatably connected to the car body side by a holding mechanism using a pivot and a bearing, and the other two points are connected to the car body side by an angle adjustment mechanism using an aiming screw and a self-locking nut. By adjusting the aiming screw, the headlights are set at the optimal angle position.

However, because the beam reflector of conventional headlights is made of metal, it is necessary to separately manufacture the aiming bracket and fix it to the reflector with welding, rivets, etc., which reduces the number of assembly steps. In addition to being laborious, the number of parts also increases, which increases costs.
In addition, the present invention has drawbacks such as the optical axis adjustment being distorted due to peeling of the welded part or the bending of the bracket due to long-term use, and the aiming screw not rotating smoothly and having poor adjustment accuracy. To provide an angle adjustment mechanism for automobile headlights, which was created to eliminate the drawbacks of the conventional technology, has a simple structure, is easy to assemble, has a small number of parts, and allows optical axis adjustment to be performed smoothly and reliably. and
The feature is that the reflector is partially or entirely made of synthetic resin, and three aiming brackets are integrally formed with the reflector.These brackets hold an elastic plate, and this plate allows aiming. The entire head of the screw is held, the threaded portion is screwed into a self-locking nut L-2 provided on the vehicle body side, and a compression coil spring is elastically loaded between the plate and the self-locking nut.

Hereinafter, one embodiment of the present invention will be described in detail based on the drawings.

Fig. 1 is a front view of an automobile headlamp using the angle adjustment mechanism according to the present invention, Fig. 2 is a sectional view taken along line I-I of Fig. 1, and Fig.
The figure is a partially cutaway side view.

In these figures, the symbol 1 is a headlight.
This headlamp 1 includes a substantially hemispherical glue flap 3 with a large opening 2 on the front surface having a substantially rectangular shape.

The reflector 3 is integrally formed with a metal main reflector 3A formed in a substantially hemispherical shape and a synthetic resin with excellent heat resistance and weather resistance such as polypropylene, and has a rear opening at the periphery of the front opening of the main reflector 3A. It is composed of a substantially rectangular ridge-shaped sub-reflector 3B whose peripheral edges are engaged with each other and which are integrally adhesively fixed with an adhesive 4.

The main reason why the reflector 3 is made into a two-part structure is because it is desired to integrally mold the sub-vector 3B and the bracket to be described later. On the other hand, if the effect of the heat of the bulb described later is small, it is not necessarily necessary to divide it into two parts, and the whole may of course be formed integrally from a synthetic resin with excellent heat resistance and weather resistance.

The inner surface of the reflector 3 is coated with aluminum vapor deposition to form a reflective surface.

5 is a valve, and this valve 5 is inserted into the reflector 3 from the valve insertion hole 6 formed at the center of the back surface of the main reflector 3A.
It is removably inserted therein via a socket fixture T.

A socket cover 8 is also detachably attached to the center of the back surface of the main reflector 3A, and covers the socket fixture 7.

An annular groove 9 is provided at the periphery of the front opening of the sub-reflector 3B.
The peripheral edge of the front lens 100 formed in the shape of a shallow box is fitted into this annular groove 9 and fixed with an adhesive.

The reflector 3, in other words, the headlamp 1 is rotatably connected and held via a holding mechanism 11 to a support member 13 fixed to the vehicle body side via a bracket 12 or the like.

That is, this holding mechanism 11 is attached to the optical axis, that is, the bulb 5.
It is provided at a position a predetermined distance to the right and above from the horizontal axis X and vertical axis Y passing through the center O of It has a cylindrical bearing 15.

As shown in FIGS. 2 and 5, this cylindrical bearing 15 has a spherical recess 16 inside and an open end 17.
has a small diameter, and this open end 17 has a function of preventing the pivot from being pulled out, which will be described later.

Further, on the outer periphery of the cylindrical bearing 15, a plurality of bearings are distributed approximately equally in the circumferential direction (this embodiment shows a case where four bearings are provided).
A groove 18 is formed.

On the other hand, a pivot 19 having a spherical head 19a corresponding to the cylindrical bearing 15 is fixed to the support member 13 by caulking.

A bush-on fix 20 (a type of speed clip) is used to connect the pivot 19 and the cylindrical bearing 15.

That is, the bush-on fixing 20 is made of metal and has a truncated conical shape, and the inner diameter of the small opening 21a is set smaller than the outer diameter of the cylindrical bearing 15. Approximately equally divided into 4
The grooves 22 are provided.

When installing the bush-on fix 20, fit the bush-on fix 20 into the pivot 19 from the small diameter opening 21a side in advance, and press the cylindrical bearing 15 against the pivot 19 to prevent the head of the pivot 190. 19a is press-fitted into the spherical inter-spherical portion 16 of the cylindrical bearing 150, and then the bush-on fixing 20
is press-fitted into the cylindrical bearing 15 as shown in FIG. 2, and its large-diameter open end 21b is brought into contact with the back surface 14 of the sub-reflector 3B.

As a result, the tip of the cylindrical bearing 15 is elastically deformed in the center direction by the small diameter opening 21a of the bush-on-fix 20, and covers the upper surface of the head 19a of the pivot 19 to prevent it from coming off.

In this case, the head 19a is formed slightly smaller than the spherical concave portion 16 of the cylindrical bear 9, thereby allowing the headlamp 10 to rotate.

In addition, the bush-on fix 20 is installed on the cylindrical bearing 1.
5, use the cylindrical bearing 150 split groove 1
It is desirable to position the split grooves 22 between adjacent split grooves 18 so that they are relatively shifted so that the bush-on-fix 200 split grooves 22 and B do not overlap.

By doing this, when the tip of the cylindrical bearing 15 is elastically deformed in the center direction, each split groove 18 is closed and the pivot 1
It is possible to more reliably surround and hold the head 19a of the headlight 1, thereby enabling smooth rotation of the headlight 1, and preventing an accident of breakage when an excessive load is applied.

The headlamp 1 is further connected to the support member 13 by a pair of angle adjustment mechanisms 24 and 25.

Since these angle adjustment mechanisms 24 and 25 are constructed with the same structure, only one of the angle adjustment mechanisms 24 will be explained below and the explanation of the other will be omitted, but both of these mechanisms 24 and 25 are arranged at equal intervals vertically from the horizontal axis X passing through the center O of the bulb 5 on a connecting wall 26 which is integrally provided by bending the left end of the sub-reflector 3B (7) backward.

The angle adjustment mechanism 24 includes three brackets 27a to 27c integrally projecting from the connecting wall 26 of the sub-reflector 3B, as appropriately shown in FIGS. 1, 2, and 5.

These three brackets 27a to 27c are connected to the reflector 3.
(The platoon in the center)
27a is provided near the front of the reflector 3, and the remaining two brackets 27b and 27c are provided at positions rearward of the central platen 27a and spaced apart from each other by an equal distance vertically.

The central platen 27a is formed into a flat plate shape, and a cutout window 28 is formed in the center thereof.

On the other hand, the rear two platters 27b and 27c are formed in an oval shape, and the front edges of the vertical walls 27b and 27c protrude forward to create stoppers 29 and 30, respectively.
It is equipped with the following.

These brackets 27a to 27cK provide approximately 1F.
It holds a plate 31 which is bent into a shape.

That is, this plate 31 is formed of a spring material, and in its natural state, the distance between the vertical piece 32a at the center and the legs 32b and 32c at both ends is set to be larger than the distance between the bracket 27a and the brackets 27b and 27c. Therefore, sometimes the plate 310 is attached using elastic deformation to both legs 32b.

With 32c open, attach platen) 27a and bracket 2
Insert from the side of the reflector 3 between 7b and 27c,
Attach the vertical piece 32a to the platen) 27a and both legs 32b, 3
2c is pressed against brackets 27b and 27c, respectively.

Moreover, the plate 31 is locked by the stoppers 29 and 30 of the brackets 27b and 27c, and is prevented from falling off.

Further, a long groove 33 for holding an aiming screw is formed in the center of the vertical piece 32b of the plate 31, and a head 34a of an aiming screw 340 is locked in this long groove 33.

A threaded portion extending rearward of the aiming screw 34 is screwed into a threaded hole 35a of a self-locking nut 35.

This self-locking nut 35 is inserted and held in a nut mounting hole (not shown) provided in the support member 13 so as to be able to swing freely, and a compression coil spring 36 is inserted between this self-locking nut 35 and the plate 31. It is loaded with bullets.

A large-diameter opening 37 is formed in the center of the support member 13, and the intermediate portion of the reflector 3 is inserted into this large-diameter opening 37 with a sufficient gap.

Further, a small reflector 38 formed in a substantially cylindrical shape is fixed to the right end of the support member 13, and a clearance lamp 39 is inserted and arranged inside the reflector 38.

The peripheral edge of a lens 400 is engaged with the open end of the reflector 38 and fixed with an adhesive 41.

Thus, in such a configuration, when the optical axis of the headlamp 1 is adjusted, it is done by adjusting the pair of angle adjustment mechanisms 24° and 25.

That is, if one, for example, the aiming screw 42 of the angle adjustment mechanism 25 is loosened in advance, and the aiming screw 34 of the other angle adjustment mechanism 24 is loosened or tightened using a tool such as a screwdriver, the headlight 1 can be adjusted. The left end portion of the pivot 19 is rotated horizontally around the head 19a of the pivot 19, that is, in the direction of arrow A in FIG. 2, and simultaneously rotated vertically around the head 19b, that is, in the direction of arrow B in FIG. Therefore, the headlight 1 can be set at an optimal angle.

Moreover, since the angle adjustment mechanisms 24 and 25 each have three brackets that are integrally provided at the same time as the sub-reflector 3B is formed, the number of parts can be substantially reduced.
As complicated installation work such as caulking is not required,
In addition to good workability, the plate 31 absorbs and relieves the force of the compression coil spring 36 due to its elasticity, which prevents the platens 27a to 27c from bending and enables stable optical axis adjustment over a long period of time.

In addition, since the aging screw 34 is held by the plate 31, rotation during optical axis adjustment is smoother than when held by the conventional platen 31, and fine adjustment is easier.

In addition, although the above embodiment has been shown for a headlight arranged on the right side of a car, it goes without saying that it can also be implemented for a left side headlight if the left and right configuration is reversed. do not have.

As explained above, according to the angle adjustment mechanism for an automobile headlamp according to the present invention, at least the outer peripheral part of the reflector is formed of synthetic resin, and a plurality of brackets are integrally formed on one side of the reflector. One end of the aiming screw is held by an elastic plate held by a bracket, and the other end of this aiming screw is screwed into a self-locking nut attached to the vehicle body to set the headlight at an angle (optical axis) to the vehicle body. ) Since the connection is adjustable, manufacturing is simple and the number of parts can be substantially reduced, and therefore installation is easy, improving workability and reducing costs.

In addition, the headlights can be held securely, the load applied to the brackets can be reduced, and the optical axis can be adjusted stably, making it extremely effective.

[Brief explanation of the drawing]

Fig. 1 is a front view of an automobile headlamp using the angle adjustment mechanism according to the present invention, Fig. 2 is a sectional view taken along line I-I of Fig. 1, and Fig.
The figure is a partially cutaway side view, Figure 4 is an exploded perspective view of the holding mechanism,
FIG. 5 is a perspective view of the main part of the angle adjustment mechanism. 1... Headlight, 3... Reflector, 1
3...Support member, 24.25...Angle adjustment mechanism, 27a-27c...Bracket, 3
1... Plate, 34... Aiming screw, 35... Self-locking nut,
36... Compression coil spring.

Claims (1)

[Scope of utility model registration request] In an angle adjustment mechanism for an automobile headlamp in which a headlamp is attached to a vehicle body so that its optical axis can be adjusted, the entire reflector constituting the headlamp or at least the periphery of the opening end is formed of synthetic resin, and the - side thereof is provided. [3 brackets are integrally formed, an elastic plate is inserted between these brackets, the head of the aiming screw is held by this plate, and the threaded part is self-locking provided on the vehicle body side. An angle adjustment mechanism for an automobile headlamp, characterized in that the angle adjustment mechanism is screwed into a nut, and a spring is loaded between the self-locking nut and the plate.