JPS6332520Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an optical axis adjustment mechanism for a headlamp.

As shown in Figure 1, the headlamp usually adjusts its optical axis using an adjuster screw a, which is inserted into a stay c attached to the lamp b side and attached to the vehicle body. A spring f is screwed into a nut e fixed to the side bracket d, and is placed between the stay c and the bracket d so as to surround the adjusting screw a.
is installed.

According to such a conventional structure, the seat surface or neck of the head of the adjuster screw a and the stay c
It has the disadvantage that it is prone to rust due to rubbing against the seat surface or the slit hole for inserting the neck of the adjustment screw.

Further, the length of the spring f is required to be four to five times as large as the amount of movement of the lamp, and the adjuster screw a is also required to be long, making it easy to shake and vulnerable to vibration. Furthermore, the large number of component parts causes high costs.

The present invention has been devised in order to eliminate these conventional difficulties.The present invention has a substantially cylindrical shape, has a hole for inserting a tool in the side wall, and has a slit hole along the axial direction on the opposite side of this hole. An adjusting screw is provided on the lamp side, has a substantially spherical shape, and has a head with a tool locking groove corresponding to the tool insertion hole, and is attached to a nylon nut fixed to the vehicle body side. and the head of the adjusting screw is fitted into the mounting part through the slit hole so that it can rotate and slide in the axial direction of the mounting part. .

Hereinafter, the present invention will be explained in detail with reference to the embodiments shown in the drawings. Reference numeral 1 denotes a mounting part integrally molded on the synthetic resin reflector 2a of the headlamp 2;
It has a substantially cylindrical shape, and a long hole 1a with a flange for inserting a tool such as a screwdriver is provided in the wall on the front side, that is, the lens 2b side, and a slit hole 1b is provided along the axial direction on the opposite side. There is. Furthermore, ribs 1c are provided on the outer wall of the mounting portion 1 so as to sandwich the long hole 1a, and ribs 1c are provided on both sides of the slit hole 1b.
d are provided for reinforcement. moreover,
Guide ribs 1e are formed on both edges of the slit hole 1b. Reference numeral 3 designates an adjusting screw, and the head 3a is formed into a substantially spherical shape, and a small flat surface is formed at the top of the head 3a, and a groove 3b for locking a tool such as a screwdriver is provided. This adjusting screw 3 is screwed into a nylon nut 5 fixed to a bracket 4 on the vehicle body side, and the head 3
a is fitted into the mounting part 1 through the slit hole 1b, and a tool 6 such as a screwdriver is inserted through the elongated hole 1a and locked in the groove 3b, and the adjuster screw 3 is screwed in or out. It is designed so that it can be screwed back. At this time, the head 3a of the adjusting screw 3 rotates within the mounting portion 1 and can slide in the axial direction of the mounting portion (actually, the mounting portion 1 is slidable).

Since the present invention is configured as described above,
When the adjuster screw 3 is screwed forward,
In FIG. 1, the headlamp 2 can be adjusted downward, while by screwing back the adjusting screw 3, the headlamp 2 can be adjusted upward. Therefore, by operating the adjusting screw 3 with the tool 6, the optical axis of the headlamp 2 can be adjusted in the vertical direction.

The horizontal optical axis adjustment of the headlamp 2 is performed using the fourth
As shown in the figure, a mounting part 1' is provided on the side of the headlamp 2 in a horizontal direction, that is, the axis of the mounting part 1' is in the horizontal direction. This can be easily done by operating the adjuster screw 3 in the same way. In addition, in the figure, 7 is a fulcrum, which has the same structure as the conventional one.

As mentioned above, in this invention, the mounting part is provided integrally with the synthetic resin reflector, and a nylon nut is used, so when it is engaged with the adjustment screw, it rubs and rusts as in the conventional case. There is no such thing. In addition, the head of the adjuster screw fits into the mounting part like a ball joint, so there is no play, allowing smooth operation, and eliminating the need for conventional springs. The length of the adjusting screw can be shortened as long as the minimum amount of movement of the lamp is ensured, resulting in less vibration and excellent vibration resistance. Furthermore, according to the present invention, it is possible to reduce the cost and weight by reducing the number of component parts.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of a conventional example, Fig. 2 is a sectional view of essential parts showing an embodiment of the present invention, Fig. 3 is a perspective view of the adjuster screw being set in the mounting part, and Fig. FIG. 4 is a layout diagram of the optical axis adjustment mechanism as seen from the front side of the lamp. 1... Mounting part, 1a... Long hole, 1b... Slit hole, 1c, 1d... Rib, 1e... Guide rib, 2... Head lamp, 3... Adjustment screw, 3a... Head, 3b ...Groove, 4...Bracket, 5...Nylon nut, 6...Tool, 7
……fulcrum.

Claims (1)

[Scope of utility model registration request] A mounting portion is provided on the lamp side, which has a substantially cylindrical shape, has a hole for inserting a tool in the side wall, and has a slit hole along the axial direction on the opposite side of this hole. An adjusting screw having a head with a locking groove for a tool corresponding to the slit hole is screwed onto a nylon nut fixed to the vehicle body, and the adjusting screw is inserted through the slit hole. 1. An optical axis adjustment mechanism for a headlamp, characterized in that a head is rotatably fitted to the mounting portion and slidably in the axial direction of the mounting portion.