JPS6247124Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automobile headlamp, and more particularly to an improvement in a headlamp in which a reflector equipped with a bulb is supported at three locations.

Conventional headlights of this type have a structure in which the reflector a can be tilted relative to the vehicle body b using one fulcrum mechanism c and two adjustment mechanisms d and e, as shown in FIGS. 1 and 2, for example. The lamp unit U is constituted by supporting the lamp unit U, and the center position A of the pivot joint c' of the fulcrum mechanism c is located on a horizontal line passing through the center B of the ball joint d' of one adjustment mechanism d. , located on a vertical line passing through the center c of the ball joint e' of the other adjustment mechanism e. and an adjustment mechanism d,
By rotating each adjusting screw i of e and changing the relative position between the screw mounting j and the ball joint, the reflector a is tilted about the center position A of the fulcrum mechanism c. It is configured such that the optical axis position of the attached bulb f can be adjusted. g is a lens.

However, in the above headlight, the adjustment mechanism e and the fulcrum mechanism c are arranged at vertical positions passing through the center of the lamp unit U, so the distance l ₁ between the fulcrum mechanism c and the adjustment mechanism d is short. Since no supporting means is provided on the side of the lamp unit U, the lamp unit U has a drawback that it is susceptible to vibration.

For this purpose, as shown in FIGS. 3 to 5, the fulcrum mechanism c is placed next to the side light h of the unit U, and the adjustment mechanism e is placed on a vertical line of the fulcrum mechanism c. There is a structure in which the distance _l2 between the and adjustment mechanism d is increased. However, compared with the conventional example shown in _FIG . Since the intensity is small, it is necessary to increase the length of the adjusting screw i in order to obtain the desired light distribution. Therefore, if the adjusting screw i is lengthened, the unit U will protrude considerably from the mounting part of the vehicle body b, and the screw mounting j fixed to the vehicle body b will be likely to wobble.
Therefore, there is a problem in that the center of gravity of the lamp unit U changes greatly when adjusting the optical axis, and the headlight vibrates due to vibrations while the vehicle is running, making it difficult to see the illuminated area.

In view of the above circumstances, the present invention aims to provide a headlamp for an automobile that can prevent the headlamp from rattling due to vibrations while the automobile is running.

Hereinafter, details of the present invention will be explained with reference to FIGS. 6 to 11. 6 to 9 show a first embodiment of an automobile headlamp according to the present invention.

This embodiment includes a reflector 1 having a lens 2 disposed in the front opening and a bulb 3 mounted inside;
The reflector 1 is supported tiltably at three locations with respect to the vehicle body 4, and the support means includes two locations.
It consists of adjustment mechanisms 5 and 6 at different locations and a fulcrum mechanism 7 at one location. Of the two adjusting mechanisms 5 and 6, the first adjusting mechanism 5 connects one end of an adjusting screw 51 to one end of the bottom of the reflector 1 via a ball joint 52, and connects one end of an adjusting screw 51 to one end of the bottom of the reflector 1. The other end of 51 is screwed into a screw mounting 53 attached to the vehicle body 4. The ball joint 52 includes a spherical portion formed at one end of the adjusting screw 51, and a bracket 1a having a spherical seat fitted with the spherical portion and protruding downward from one end of the bottom of the reflector 1. It's summery. The second adjustment mechanism 6 has one end of an adjusting screw 61 connected to the other end of the upper part of the reflector 1 via a ball joint 62, and the other end of the adjusting screw 61 connected to a screw attached to the vehicle body 4. mounting 63
are screwed together. The ball joint 62 has a spherical part formed at one end of the adjusting screw 61, a spherical seat fitted with the spherical part, and a bracket 1 provided upwardly projecting from the other end of the upper part of the reflector 1.
It consists of b.

On the other hand, the fulcrum mechanism 7 connects the other end of the bottom of the reflector 1 and the vehicle body 4 via a pivot joint 71, for example, at a position separated from the first adjustment mechanism 5 by an appropriate distance _L2 at the bottom of the reflector 1. ing. The pivot joint 71 has a connecting rod 72 that is formed facing downward at the bottom of the reflector 1 and has a spherical portion at the tip, and a spherical seat that fits into the spherical portion of the connecting rod 72, and is fixed to the vehicle body 4. Support stand 7
It consists of 3. The center position A of the pivot joint 71 of the fulcrum mechanism 7 is located at the center position A of the pivot joint 71 of the fulcrum mechanism 7.
is located on a horizontal line with the center B of the ball joint 52 of the second adjusting mechanism 6, and is located on a vertical line with the center C of the ball joint 62 of the second adjustment mechanism 6. Therefore, by rotating the adjusting screws 51 and 61, the reflector 1 is tilted about the center position A of the pivot joint 71, thereby adjusting the optical axis position of the headlight. It is configured as follows.
Note that 8 is a vehicle light.

However, in the present invention, a vibration prevention mechanism is provided to prevent the headlight from vibrating during driving. The vibration prevention mechanism has a circular protrusion 9 disposed on the vehicle body 4, a circular groove 10a that can fit into the circular protrusion 9, and an arm 10 disposed on the outer wall of the reflector 1. It is made up of.

That is, as shown in an enlarged perspective view in FIG. 9, the circular protrusion 9 is formed integrally with a neck 93 provided on a base plate 92 of a bracket 91 fixed on the vehicle body 4. It has a round elongated body shape. The central axis D of the circular protrusion 9 is on a horizontal line passing through the center B of the ball joint 52 of the first adjustment mechanism 5 and the center position A of the pivot joint 71 of the fulcrum mechanism 7, and It is arranged so as to coincide with the radius R centered on the center position A. On the other hand, the arm portion 10 is provided on the side near one end of the reflector 1 so as to protrude toward the circular protruding portion 9, and the circular groove portion 10a at the tip thereof is connected to the central axis of the circular protruding portion 9. It has a central axis that matches D.
This circular groove-like portion 10a has a center 10
b is formed corresponding to the size of the circular protrusion 9 so that it can make line contact with the outer periphery of the circular protrusion 9, and is formed to expand slightly from the center 10b to both ends 10c. Vibration of the lamp unit can be prevented by the sliding contact between the circular protrusion 9 and the circular groove 10a.

In the automobile headlamp of the present invention, as described above, the circular protruding portion 9 provided on the vehicle body 4 and the circular groove portion 10a of the arm portion 10 provided on the reflector 1 are in sliding contact. Absorbs vibrations transmitted from the car body 4,
Even if the distance _L2 is long, it is possible to reliably prevent the headlight from shaking. Furthermore, since both the circular protrusion 9 and the arm 10 are simply added to their respective predetermined positions, the design of the headlamp is not significantly impaired.

Figure 10 shows the second automotive headlight according to the present invention.
In this case, the second adjustment mechanism 6 and the fulcrum mechanism 7 are respectively arranged at vertical positions passing through the approximate center position of the unit U, and the first adjustment mechanism 5 is placed at the other end of the reflector 1. It is applied to a structure in which the distance L ₁ between the fulcrum mechanism 7 and the first adjustment mechanism 5 is shortened by disposing it at the bottom. That is, as in the first embodiment, the circular protrusion 9 is provided on the vehicle body 4, and the arm portion 10 having the circular groove 10a is provided on the side of the outer wall of the reflector 1, so that the circular groove 10a and the arm 10 are provided on the sides of the outer wall of the reflector 1. The circular protrusion 9 is made compatible with the circular protrusion 9, so that basically the same effects as in the first embodiment can be obtained.

In each of the embodiments, one vibration prevention mechanism is provided, but in the present invention, a plurality of vibration prevention mechanisms may be provided. Further, in each of the above-mentioned embodiments, the circular protruding portion 9 is provided on the vehicle body 4 side, and the circular groove portion 10 is disposed on the vehicle body 4 side.
11, the circular protrusion 9' is provided on the reflector side, and the circular groove 10 is provided on the reflector side.
It is also possible to arrange a' on the vehicle body 4 side. In this case, the central axis D of the circular groove-shaped portion 10a' is on a horizontal line passing through the center B of the ball joint 52 of the first adjustment mechanism 5 and the center position A of the pivot joint 71 of the fulcrum mechanism 7,
In addition, it goes without saying that it is arranged so as to match the radius centered on the center position A of the pivot joint 71.

As described above, according to the present invention, the circular groove portion disposed on either the reflector or the fixing member such as the vehicle body and the circular protrusion portion disposed on the other are brought into sliding contact with each other, thereby fixing the vehicle body. Since the structure is configured to absorb vibrations, it is possible to improve the vibration resistance of an automobile headlamp having an optical axis adjustment mechanism.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an example of a conventional headlamp, FIG. 2 is a bottom view taken in the direction of the arrow in FIG. 1, FIG. 3 is a front view showing another example of a conventional headlamp, and FIG. The figure is the third
FIG. 5 is a bottom view taken in the direction of the arrows in the figure, and FIG. 5 is a partially sectional side view taken in the direction of the arrows in FIG. 3. FIG. 6 is a front view showing the first embodiment of the automobile headlamp according to the present invention, FIG. 7 is a bottom view taken in the direction of the arrow in FIG. 6, and FIG. 8 is a partial view taken in the direction of the arrow in FIG. 6. cross-sectional side view,
FIG. 9 is an enlarged exploded perspective view showing the vibration prevention mechanism, and FIG. 10 is a front view corresponding to FIG. 6 showing a second embodiment of the automobile headlamp according to the present invention. 1st
FIG. 1 is an enlarged exploded perspective view showing another embodiment corresponding to FIG. 9. 1...Reflector, 2...Lens, 3...Bulb, 4
...Vehicle body, 5...First adjustment mechanism, 51...First adjustment screw, 52...First ball joint, B...Center of first ball joint 52, 6...Second adjustment mechanism, 61...Second adjustment screw U, 62...second ball joint, C...center of second ball joint 62, 7...fulcrum mechanism, 71...pivot joint, A...center position of pivot joint 71,
9, 9'...Circular protrusion, D...Central axis of the circular protrusion, 10a, 10a'...Circular groove.

Claims (1)

[Scope of utility model registration request] A reflector having a lens disposed in a front opening and a bulb mounted inside; and support means supporting the reflector so as to be tiltable at three positions relative to a fixed member; The first and second adjustment mechanisms connect one end of each adjusting screw to the bottom and top of the reflector via a ball joint, respectively, and The other ends of the strike screws are respectively screwed to the fixing member, and the fulcrum mechanism connects the fixing member to a position at the bottom of the reflector at a suitable distance from the first adjustment mechanism via a pivot joint, and In the headlamp, the center position of the pivot joint is located on the same horizontal line as the center of the ball joint of the first adjustment mechanism, and is located on the same vertical line as the center of the ball joint of the second adjustment mechanism, wherein the fixing member or at least one circular protrusion is disposed on either one of the reflectors, and a circular groove-like portion that can swingably come into sliding contact with the circular protrusion is disposed on the other; The central axis of the protrusion or circular groove is located on a horizontal line passing through the center of the first adjustment mechanism and the center position of the fulcrum mechanism, and coincides with a radius centered on the center position of the fulcrum mechanism. A headlamp for an automobile, characterized in that vibrations transmitted from a vehicle body are prevented by sliding contact between the circular groove portion and the circular protrusion portion.