JPH0247527Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention is a vehicle headlamp that prevents rainwater from entering the lamp and can follow the movement of the reflector when adjusting the optical axis. This is about a waterproof cover that can be used.

[Conventional technology]

Hereinafter, a conventional waterproof cover for an automobile headlamp will be explained with reference to FIGS. 4 to 6.

In the figure, 1 is a housing, and this housing 1 is provided with openings 10 and 11 on the front and rear sides, respectively. Recess 1 in front opening 10
2, an engaging protrusion 13 is provided in the rear opening 11, respectively. 15 is the vehicle body.

Reference numeral 2 denotes a lens, and this lens 2 has a dish-like shape, and adhesive legs 20 are integrally provided around the entire circumference of the opening. The adhesive leg 20 of this lens 2 is adhered to the recess 12 of the housing 1 with an adhesive 21. 22 is a rim.

Reference numeral 3 denotes a reflector that is rotatably arranged on a pivot bearing 32 in a lamp chamber 14 defined by the housing 1 and the lens 2, and this reflector 3 has openings 30 and 31 on the front and rear sides. Provide each. 33 is an optical axis adjustment mechanism provided between the housing 1 and the reflector 3.

4 is a holder, and this holder 4 has a through hole 40 through which a valve 5, which will be described later, is inserted;
An engaging portion 41 is provided on the edge of the 0, and one end of a mounting spring 42 is attached. The holder 4 thus formed is inserted into the rear opening 31 of the reflector 3 and fixed.

Reference numeral 5 denotes a bulb, and this bulb 5 includes a glass tube 50 enclosing a filament 54, a cylindrical cap 51 integrally provided at the rear of the glass tube 50, and the glass tube 50 and cap 51. It consists of a flange 52 integrally protruding from the boundary between the cap 51 and a terminal 53 protruding rearward from the rear end of the base 51. The glass bulb 50 of the bulb 5 thus formed is inserted into the reflector 3 through the through hole 40 of the holder 4, the flange portion 52 of the bulb 5 is engaged with the engaging portion 41 of the holder 4, and the mounting spring 42 is used to tighten the bulb 5. The flange portion 52 of is pressed against the engaging portion 41 of the holder 4, and the bulb 5 is removably attached to the reflector 3 via the holder 4.

6 is a waterproof cover made of rubber, and this waterproof cover 6 fits into the base 51 of the valve 5 and closes the valve 5.
a boss-shaped valve seal part 60 that seals the mouthpiece 51 of the housing 1; and a skirt-shaped housing seal part 6 that abuts the peripheral edge of the rear opening 11 of the housing 1 and seals the rear opening 11 of the housing 1.
1, the reflector 3 and the valve 5 are provided between the valve seal part 60 and the housing seal part 61.
A thin bellows-shaped deforming portion 62 deforms and follows the movement of the optical axis during adjustment of the optical axis. The thickness of this deformed portion 62 is approximately 0.8 mm, the thickness of the other seal portions 60 and 61 is approximately 2.5 mm, and the thickness of this deformed portion 62 is approximately 0.8 mm.
It is about one-third thinner than the thickness of 1. An engaging portion 63 is provided in the circumferential direction between the housing seal portion 61 and the deformed portion 62, and an annular drainage/breathing passage 64 is provided.
will be established. A communication hole 65 is provided at the upper end of this drainage/breathing passage 64 to communicate with the inside of the lamp, and a breathing hole 6 communicating with the outside is provided at the middle portion of both the left and right sides of the drainage/breathing passage 64.
6 is provided, and a drainage/breathing hole 67 communicating with the outside is further provided at the lower end of the drainage/breathing passage 64. The valve seal portion 60 of the waterproof cover 6 thus formed is tightly fitted onto the base 51 of the valve 5, the engaging portion 63 of the waterproof cover 6 is engaged with the engaging protrusion 13 of the housing 1, and the housing seal of the waterproof cover 6 is closed. The portion 61 is brought into close contact with the peripheral edge of the rear opening 11 of the housing 1.

In this manner, the waterproof cover 6 seals the rear opening 11 of the housing 1 and the base 51 of the bulb 5, thereby preventing rainwater from entering the lamp.

Furthermore, when the optical axis adjustment mechanism 33 is operated and the reflector 3 is rotated and tilted around the pivot bearing 32 to adjust the optical axis, the thin deformed portion 62 of the waterproof cover 6 deforms and the reflector 3 moves. follow.
Therefore, the reflector 3 can be smoothly rotated and tilted with respect to the housing 1, and the optical axis can be adjusted smoothly. Moreover, the sealing performance of the waterproof cover 6 does not deteriorate.

[Problem that the invention attempts to solve]

However, in the conventional waterproof cover described above, the deformable part 62 is formed thin so that it can follow the movement of the reflector 3 when adjusting the optical axis, so the strength of the deformable part 62 is reduced and it becomes difficult to replace the bulb when replacing the bulb. The deformed portion 62 may be damaged. In addition, since the wall thickness of the deformed portion 62 (approximately 0.8 mm) is relatively thinner than the wall thickness (approximately 2.5 mm) of the other portions of the valve seal portion 60 and the housing seal portion 61, the thin deformed portion 62 has a thin shape. There are problems such as difficulty.

An object of the present invention is to provide a waterproof cover that can follow the movement of a reflector during optical axis adjustment without reducing strength or reducing wall thickness.

[Means for solving problems]

The present invention is characterized in that the deformed portion between the valve seal portion and the housing seal portion is formed with a closed cell structure.

[Effect]

By forming the deformed part with a closed cell structure, the present invention reduces the hardness of the deformed part without reducing the thickness of the deformed part or reducing the strength of the deformed part. It can follow the movement of the reflector.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a waterproof cover for an automobile headlamp according to the present invention will be described below with reference to FIGS. 1 to 3.

In the figure, the same reference numerals as in FIGS. 4 to 6 indicate the same parts. In the figure, 62' is the valve seal part 60
This deformed part 62' is formed between the housing seal part 61 and the valve seal part 61, and this deformed part 62' is formed with a closed cell structure, and its wall thickness is greater than that of the other valve seal parts 60.
The thickness of the housing seal portion 61 is approximately equal to that of the housing seal portion 61, and has a bellows shape.

In this embodiment, the waterproof cover for the automobile headlamp of the present invention has the above-mentioned structure, that is, the deformed portion 62' is formed with a closed cell structure, so that the thickness of the deformed portion 62' is not made thin, and The hardness of the deformed portion 62' can be reduced without reducing the strength. As a result, the deformable portion 62' can deform to follow the movement of the reflector 3 during optical axis adjustment. Furthermore, since it is not necessary to reduce the thickness of the deformed portion 62', it is easier to mold the deformed portion 62' compared to a thin deformed portion. Further, since the strength of the deformed portion 62' is not reduced, there is no risk of the deformed portion 62' being damaged when the valve 5 is replaced.

[Effect of idea]

As is clear from the above, in the waterproof cover of the automobile headlamp of the present invention, the deformed part between the valve seal part and the housing seal part is formed with a closed cell structure. It is possible to lower the hardness of the deformed portion and follow the movement of the reflector during optical axis adjustment without making it thin or reducing the strength of the deformed portion. Therefore, the deformed portion is easier to mold than a thin deformed portion, and there is no risk of the deformed portion being damaged.

[Brief explanation of the drawing]

Figures 1 to 3 show an embodiment of the waterproof cover for an automobile headlamp according to the present invention, in which Figure 1 is a longitudinal cross-sectional view, Figure 2 is a cross-sectional view, and Figure 3 is a rear view. be. 4 to 6 show a waterproof cover for a conventional automobile headlamp, in which FIG. 4 is a longitudinal cross-sectional view, FIG. 5 is a cross-sectional view, and FIG. 6 is a rear view. 1... Housing, 11... Rear opening, 2...
...Lens, 3...Reflector, 32...Pivot axis, 33...Optical axis adjustment mechanism, 4...Holder, 5...
...Valve, 51...Base, 6...Waterproof cover, 6
0... Valve seal part, 61... Housing seal part, 62'... Deformed part.

Claims (1)

[Scope of utility model registration request] In an automobile headlamp, a reflector is rotatably and tiltably supported in a lamp chamber defined by a housing and a lens, and a bulb is removably attached to the reflector. A valve seal part that seals the mouthpiece part,
A housing seal part that contacts the rear opening edge of the housing and seals the rear opening of the housing, and a closed cell structure is formed between the bubble seal part and the housing seal part to prevent movement when adjusting the optical axis of the reflector. A waterproof cover for an automobile headlamp, characterized in that the cover comprises a deformable portion that deforms and follows.