JPH0119762Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a reflector disposed in a lamp housing of a headlamp whose optical axis can be adjusted, and a fixed fulcrum structure among the supporting fulcrums of the reflector. It is.

(Prior Art) Generally, the structure of a headlamp that allows this type of optical axis adjustment is known as shown in FIG.
In this known headlamp, 1 is a lamp housing, a lens 2 is attached to the front side of the lamp housing, and a reflector 3 is provided inside.
is installed. This reflector is supported at three points on its back side for optical axis adjustment. One of the supporting fulcrums is a fixed fulcrum, and a plastic holder 5 is attached to a stay 4 attached to the back side of the reflector 3, and a funnel-shaped bearing part 6 is formed in the holder. The spherical head 8 of the pivot 7 is fitted, and the pivot is fixed to the rear side of the lamp housing 1 in an embedded state. The other supporting fulcrum is a plastic nut part 10 attached to another stay 9 provided on the back side of the reflector 3 in the same way, and a hole provided through the nut part from the back side of the lamp housing 1. The threaded portion of the threaded screw 11 is threaded. Although only one aiming screw is shown in the illustration, there is another one with a similar structure, and it is supported at three points in total.

In such an optical axis adjustment device, by rotating one of the aiming screws from outside the lamp housing, the reflector 3 changes its inclination about the fixed fulcrum, and the optical axis is adjusted.

However, since the fixed fulcrum has a structure in which the spherical head 8 of the pivot 7 is forcibly fitted into the holder 5, it is susceptible to external forces such as pressing force or vibration when replacing a light bulb. Therefore, there is a drawback that the pivot 7 comes off from the holder 5, making it impossible to adjust the optical axis thereafter.

(Purpose of the invention) The present invention was made in order to eliminate such drawbacks, and its purpose is to provide a reflector with an adjustable optical axis in a headlamp in which the pivot does not come out of the holder even under external pressure. The aim is to provide a fixed fulcrum structure.

(Structure of the invention) The invention made to achieve this purpose is:
A stay is attached to a reflector disposed within the lamp housing, a pivot having a spherical head is attached to the stay, a holder that engages with the pivot is formed into a prismatic shape, and a bearing portion into which the spherical head fits is attached to the holder. A headlamp characterized in that the holder is provided by cutting into a side surface of the lamp housing, and the holder is inserted and fixed into a rectangular cylindrical mounting portion provided inside the back side of the lamp housing so as to close the bearing portion. A fixed fulcrum structure for a reflector with an adjustable optical axis, in which the spherical head of the pivot is fitted from the side of the bearing part, the holder is inserted into the rectangular cylindrical mounting part, and the holder is attached to the back of the lamp housing using screws, for example. Since it is fixed from the side and the bearing part is closed, the pivot will not come off from the holder even if pressure is applied from the outside.

(Embodiments) Next, the present invention will be explained in more detail with reference to the illustrated embodiments. First, the same parts as in the conventional example are given the same reference numerals, and detailed explanation thereof will be omitted. The conventional example is holder 5
is attached to the stay 4 side and the pivot 7 is attached to the lamp housing side, but in this invention, this is reversed, the pivot 7 is fixed to the stay 4 side, and the spherical head 8 of the pivot is attached to the lamp housing 1 side. toward the back side. The holder 5 has a prismatic shape as a whole, and a bearing part 6 is attached from the side toward the end of the holder.
It is provided with a cut-out.

The holder 5 is attached to the lamp housing 1 side, and has a rectangular cylindrical mounting portion 12 integrally formed inside the back surface of the lamp housing 1.
The holder 5 inserted into the mounting portion 12 is fixed from the back side of the lamp housing 1 with, for example, screws 13. Note that the other structure of the optical axis adjustment device is the same as that of the conventional example.

(Function) In the fixed fulcrum of the present invention having the above configuration, the spherical head 8 of the pivot 7 attached to the stay 4 is first inserted into the bearing portion 6 of the holder 5 from the side, and then the holder 5 is inserted into the bearing portion 6 of the holder 5 from the side. By inserting the lamp into the mounting part 12, the bearing part 6 is closed, and the inserted holder 5 is fixed with screws 13 from the back side of the lamp housing 1. When the holder 5 is inserted into the mounting portion 12 in this manner, the bearing portion 6 is completely closed, so that the pivot 7 cannot be removed from the holder 5. Even if the aiming screw is turned in this state when adjusting the optical axis, it is rotatable within a predetermined angular range when the pivot 7 and the holder 5 are engaged, and there is no problem with the optical axis adjustment work.

(Effect of the invention) As explained above, the fixed fulcrum according to the invention is
The pivot is attached to the stay side, and the holder is fixed to the lamp housing side.The holder is formed into a prismatic shape, and a bearing part into which the spherical head of the pivot fits is cut out from the side of the holder, and the holder is attached to the lamp housing. Since the structure is fixed by inserting it into a square tube-shaped mounting part provided in the bearing, the spherical head fitted into the bearing part is held down by the square tube-shaped mounting part, making it difficult to replace, for example, a light bulb. Even if an external pushing force due to time or vibration is applied to the reflector, the holder and the pivot do not come off, and the excellent effect is that the normal state can always be maintained.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a conventional headlamp with an optical axis adjustment function, Fig. 2 is a sectional view of only the main parts showing the fixed fulcrum structure of the reflector according to the present invention, and Fig. 3 is a sectional view of the fixed fulcrum structure of the reflector according to the present invention. FIG. 3 is an exploded perspective view. DESCRIPTION OF SYMBOLS 1... Lamp housing, 3... Reflector, 4... Stay, 5... Holder, 6... Bearing part, 7... Pivot, 8... Spherical head, 12...
Square tube-shaped mounting part, 13...screws.

Claims (1)

[Scope of utility model registration request] A stay is attached to a reflector disposed within the lamp housing, a pivot having a spherical head is attached to the stay, a holder that engages with the pivot is formed into a prismatic shape, and a bearing portion into which the spherical head fits is attached to the holder. A headlamp characterized in that the holder is cut into a side surface of the lamp housing, and the holder is inserted and fixed into a rectangular cylindrical mounting portion provided inside the back side of the lamp housing so as to close the bearing portion. Fixed fulcrum structure of reflector with adjustable optical axis.