JPS6119444Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a vehicle headlamp. More specifically, the present invention relates to a vehicle headlamp in which a reflector is supported at three points so as to be adjustable in angle within a housing in which a lens covering a front opening is disposed.

As shown in FIGS. 1 and 2, a conventional vehicle headlamp of this type has a lens 2 disposed on the front surface of a housing 1 to cover the opening thereof, and a reflector 3 supported at three points within the housing 1. The reflector 3 has a bulb holder 4 at the rear thereof, and a bulb 5 is detachably attached to the bulb holder 4. One of the support locations of the reflector 3
P ₁ is configured as a fulcrum mechanism, and the other two locations P ₂ and P ₃ are configured as adjustment mechanisms. The adjustment mechanisms P ₂ and P ₃ are connected to the mounting portion 6 of the reflector 3, as shown by P ₂ in FIG.
It is constructed by screwing an adjusting screw 9 which is rotatably held in a fixed position in the housing 1 by a holding plate 8 and can be operated from the outside into a screw mounting 7 made of synthetic resin provided in a. .

As shown in FIG. 3, the fulcrum mechanism P ₁ includes a support base 12 made of synthetic resin, which has seat parts 10, 10 protruding from inside the housing 1, and a spherical receiving hole 11 in the seats 10, 10. are fixed with screws 13, 13, and on the reflector side, a connecting rod 14 is fixed to the mounting part 6b of the reflector 3, and a spherical head 15 formed at the tip of the connecting rod 14 is press-fitted into the spherical receiving hole 11. It is a pivot fit. Therefore, the adjustment mechanism P ₂ ,
By operating the adjusting screw 9 of either one of _P3 , the reflector 3 can be adjusted between the fulcrum mechanism _P1 and the adjustment mechanism _P2.
The angle changes left and right or up and down with the axis passing through either P ₃ or P 3 as the center of rotation, and the main optical axis of the bulb is displaced to adjust the irradiation area in a desired direction. Incidentally, reference numeral 16 denotes a waterproof cover made of an elastic material such as rubber that closely fits onto the base of the bulb 5 and covers the opening of the opening of the housing 1, and is configured so as not to interfere with the angle adjustment of the reflector 3.

However, in the conventional vehicle headlamp, the fulcrum mechanism _P1 is pivotally fitted by press-fitting the spherical head 15 into the spherical receiving hole 11.
1 is formed by undercutting the inlet diameter _l2 to be somewhat smaller than the diameter _l1 , as shown in FIG. 4, in order to prevent the spherical head 15 from coming off after being press-fitted. Therefore, this undercut portion 11a is weak because it is formed by forcibly punching out a spherical mold during molding of the spherical receiving hole 11, and from the viewpoint of moldability, the inlet diameter l ₂ is smaller than the diameter l ₁ dimension. It cannot be made extremely small, and as a result, play occurs after the spherical head 15 is fitted, and the reflector 3
The spherical head 15 may move slightly and interfere with light distribution, or the spherical head 15 may slip out of the spherical receiving hole 11 due to distortion of the reflector 3.
Moreover, the conventional fulcrum mechanism _P1 has a problem in that it has a large number of parts.

In view of the above circumstances, the present invention is a vehicle headlamp equipped with a novel fulcrum mechanism that has a small number of parts, does not cause rattling, functions as a sufficient fulcrum mechanism, and is waterproof. The purpose is to provide

Hereinafter, one embodiment of a vehicle headlamp according to the present invention will be described with reference to FIGS. 4 and 5. The overall structure of the headlamp according to the present invention will be explained with reference to FIGS. 1 and 2.

The headlight of the present invention, like the conventional one, has a reflector 3 supported at three points within a housing 1 in which a lens 2 covering a front opening is disposed, and a bulb holder 4 is attached to the rear of the reflector 3. A valve 5 is detachably attached to the bulb holder 4. Also, among the three locations that support the reflector 3, one location _P1 is configured as a fulcrum mechanism, and the other two locations are
P ₂ and P ₃ are configured as an adjustment mechanism. The adjustment mechanisms P ₂ and P ₃ in this example are rotatably held in a fixed position by a retaining plate 8 on the outer surface of the housing 1 with respect to a screw mounting 7 made of synthetic resin provided on the mounting portion 6a of the reflector 3. It is constructed by screwing together an adjusting screw 9 that can be operated from the outside. Note that the adjustment mechanisms P ₂ and P ₃ are not limited to this example.

As shown in FIG. 5, the fulcrum mechanism P ₁ of the present invention has a support part 16 with an insertion hole 17 having a spherical recess 18 on the back surface integrally formed with the housing 1, and a spherical recess 18 in the insertion hole 17. A screw 19 having a spherical head 20 corresponding to The reflector 3 is constructed by inserting the screw 19 into the reflector 3 in a compressed state.

Specifically, the support portion 16 in this example is attached to the housing 1.
The insertion hole 17 has approximately the same thickness and protrudes inwardly, and has an insertion hole 17 having a spherical recess 18 formed in an approximately half-shape on the back side thereof. Further, the insertion hole 17 has a tapered shape that gradually becomes wider as it goes from the spherical recess 18 toward the front side.

The head of the screw 19 is a spherical head 20 formed in a spherical shape with approximately the same radius as the spherical recess 18, and a groove 20a for operation is provided at the top of the spherical head 20.
is formed. The shaft portion of the screw 19 has a threaded portion 19a that is threadedly engaged with the mounting portion 6b over the entirety.
However, in this example, the threaded portion 1 is provided approximately halfway.
9a is formed so that it cannot be screwed any further into the mounting portion 6b, and a gap is formed between the support portion 16 and the mounting portion 6b. The gap is set to such an extent that the packing 21 interposed between the support part 16 and the attachment part 6b is slightly compressed.

Therefore, according to the fulcrum mechanism _P1 of the present invention, since the support part 16 having the insertion hole 17 having the spherical recess 18 is integrally formed in the housing 1, it is not necessary to prepare a separate support stand as in the conventional case. There is no need to fix it, and the number of parts can be reduced accordingly, and the manufacturing and management time can also be omitted. In addition, since a slightly compressed gasket 21 is interposed between the support portion 16 and the mounting portion 6b, it prevents water etc. from entering through the insertion hole 17, and the repulsive force of the gasket 21 causes the spherical surface of the screw to By bringing the head 20 into pressure contact with the spherical recess 18, it is possible to prevent rattling. When adjusting the angle of the reflector 3, if the adjusting screw 9 of either the adjusting mechanism _P2 or _P3 is operated, the fulcrum mechanism
P ₁ has a spherical head 20 in a spherical concave portion 1 as shown in FIG.
The screw 19 is tilted by sliding the screw 8, and the gasket 21 is further bent accordingly, changing the angle of the reflector 3, so that it can fully perform its function as a fulcrum.

In the above embodiment, the mounting part 6b of the reflector 3 is provided hanging down on the back surface of the flange of the reflector main body, but the mounting part 6b may be a flange of the reflector main body, and is limited to the above example only. It is not something that will be done.

As described above, the present invention supports the reflector at three points within the housing in which the lens covering the front opening is arranged, one of which is configured as a fulcrum mechanism, and the other two points are configured as adjustment mechanisms. In the vehicle headlamp in which the reflector is supported in an angle-adjustable manner, the fulcrum mechanism includes a support portion having an insertion hole having a spherical recess on the back surface integrally formed in the housing, and A screw having a spherical head corresponding to the spherical recess is inserted into the hole from behind, and the spherical head 20 of the screw 19 is inserted into the spherical recess 18.
, the packing 21 is inserted in a slightly compressed state between the front surface of the support part 16 and the reflector 3, and the screw 19 is screwed into the reflector, so the number of parts is small. In addition, since the packing is compressed by screw engagement, it functions as a sufficient fulcrum without causing play, and also prevents water from entering through the insertion hole. Obtainable.

[Brief explanation of the drawing]

Figure 1 is a front view of a conventional vehicle headlamp, Figure 2 is a cross-sectional view taken along line A-A in Figure 1, and Figure 3 is B in Figure 2.
FIG. 4 is an enlarged sectional view of a conventional support base. FIG. 5 is a sectional view showing an embodiment of the fulcrum mechanism according to the present invention, and FIG. 6 is a sectional view showing the state when the reflector is tilted. DESCRIPTION OF SYMBOLS 1... Housing, 2... Lens, 3... Reflector, 5... Bulb, 9... Adjustment screw, 16... Support part, 17... Insertion hole, 18...
... Spherical recess, 19 ... Screw, 20 ... Spherical head of screw, 21 ... Packing, P ₁ ... Fulcrum mechanism, P ₂ ,
P ₃ ...Adjustment mechanism.

Claims (1)

[Scope of utility model registration request] A reflector is supported at three points within a housing in which a lens covering the front opening is disposed, and one of the three points constitutes a fulcrum mechanism, and the other two points constitute an adjustment mechanism to adjust the angle of the reflector. In the vehicular headlamp that is adjustable and supported, the fulcrum mechanism includes a support portion having an insertion hole having a spherical recess on the back surface integrally formed with the housing;
A screw having a spherical head corresponding to the spherical recess is inserted into the insertion hole from behind, the spherical head of the screw is fitted into the spherical recess, and the gasket is slightly compressed between the front surface of the support part and the reflector. 1. A vehicle headlamp characterized in that the screw is screwed into the reflector in a state in which the screw is inserted into the reflector.