JPS5834646Y2 - Vehicle lights - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a vehicular lamp, and more particularly to a vehicular lamp in which a lens and a housing are firmly joined together.

In this type of vehicle lamp, a lens is adhesively fixed to a housing using a sealant such as hot melt.

In order to improve the reliability of the adhesive strength, to solve the problem of fitting to the vehicle body, and to prevent the lens from falling off, as shown in FIGS. After gluing the leg part e of the lens d with the sealant f,
As shown in Fig. 1, fix the boss g of lens d and the mounting flange h with screws i, or as shown in Fig. 2, protrude the caulking pin j of lens d and insert it into the mounting flange h. , the tip of the pin j is crimped by ultrasonic waves or the like to strengthen and fix the joint between the lens d and the housing a.

However, since such a conventional vehicle lamp has a boss g or a pin j protruding from the lens d, the structure of the lens d is complicated, and furthermore, the boss g or the crimping pin j is Correspondingly, since the housing a is provided with the mounting flange h, the structure of the housing a becomes complicated, and when the lens d and the housing a are molded, the boss g, the pin j, and the mounting flange may be damaged, causing problems in molding. There is also a boss part g, pin j, for structural reinforcement of the vehicle lamp.
It may become impossible to form the mounting flange h.

In addition, for this reason, there are some lamps (not shown) that have been proposed in which a boss part g (or crimping pin j) is protruded from the inside (on the light source side) of the leg part e of the lens d due to design considerations. There are problems with the appearance of the boss g and crimping pin j as they are visible from the outside of the lens d, problems with light distribution where the boss g and crimping pin j block light from the light source, and the lens light emitting surface becomes smaller. There's a problem.

In addition, do not tighten screw 5 or tighten the pin as described above, and use sealant f.
If you try to firmly join and fix lens d and housing a with a chisel, it is necessary to increase the width of groove C of housing a, which will cause problems in appearance and increase the light emitting area of lens d. This may cause problems such as the size becoming smaller.

SUMMARY OF THE INVENTION An object of the present invention is to improve the above-mentioned drawbacks, and to provide a new vehicle lamp that has a simple structure and can firmly bond and fix a lens and a housing.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An example of the implementation of a vehicle lamp according to the present invention will be described below with reference to the accompanying drawings.

This embodiment is shown in FIGS. 3 to 5, in which the present invention is applied to an automobile lamp.

That is, as shown in the illustration, the vehicle lamp of the present invention is provided with a housing 1 and a flange portion 11 at the periphery of the opening of the housing 1, and a flange portion 11 is provided at the periphery portion 21 of the lens 2 so that the end portion 12 of the flange portion 11 abuts against the flange portion 11. A step 22 is provided on the inner surface, and this step 22
The surfaces of the end portion 12 of the flange portion 11 are brought into contact with each other, and the fixing member 4 having the embedded portion 41 is attached to the stepped portion 22 from the back side of the end portion 12 of the flange portion 1 by ultrasonic vibration or the like. The peripheral edge portion 21 of the lens 2 is buried and reinforced and bonded to the flange portion 11 of the housing 1 via the fixing member 5, and a sealing agent 5 is further applied to the bonded portion to seal the housing 1 and the lens 2. Fix the lens 2 into the housing 1
The joint strength is reinforced from the back side of the flange portion 11 and the seal is fixed.

More specifically, the housing 1 is molded from a synthetic resin such as polypropylene, while the lens 2 is molded from a translucent resin such as acrylic resin.

Step portions 22 are formed on the inner surface of the peripheral edge portion 21 of the lens 2 at appropriate locations or over the entire circumference, and four portions 23 are formed in the step portions 22.

Then, the end portion 12 of the peripheral flange portion 11 of the housing 1 is abutted against the stepped portion 22 on the inner surface of the peripheral portion 21 of the lens 2, and the embedded portion 41 of the fixing member 4 is positioned in the recessed portion 23. is applied to the head 42 to embed the embedded part 41 in the stepped part 22 by ultrasonic vibration, fix the end 12 of the flange part 11 with the head 42, and attach the lens 2 to the housing 1 via the fixing member 5. A strong reinforcing joint is made on the back side, and a sealant 5 is further applied to the entire circumference of the reinforced joint to seal and fix the lens 2 and the housing 1, thereby reinforcing and sealing the housing 1 and the lens 2. It is fixed as one piece.

In the figure, reference numeral 6 is a sheet gasket bonded with a sealant 5 at the joint between the lens 2 and the housing 1, and reference numeral 3 is a light source bulb disposed within the lamp chamber.

The fixing member 4 has heads 42, 421 formed by press molding or extrusion molding of a metal plate, as shown in FIGS.
．． 422 and embedded portions 41, 411, 412 are formed in an abbreviated shape, and the embedded portions 41, 411, 412 cannot be removed when embedded within the thickness of the stepped portion 22 of the lens peripheral portion 21. In order to increase the stopping effect, it is formed in a wavy or serrated shape as shown in the figure, and the head 421 and the embedded part 411 are folded back like an opening to prevent deformation. It is something that exists.

Furthermore, in the above embodiment, when the embedded part 41 of the fixing member 4 is embedded in the stepped part 22 provided on the inner surface of the peripheral edge part 21 of the lens 2, the fixing member 4 is embedded in the end part 12 of the flange part 11 of the housing 1. The head 42 of the fixing member 4 is locked and fixed, but a hole or a recess is provided in the flange portion 11 of the housing 1, and the embedded portion 41 of the fixing member 4 is positioned in this hole or four parts. the embedded part of the fixing member 4 to the stepped part 2 of the lens 2.
It is also possible to embed it in 2 and fix it.

As is clear from the above-described embodiments, the vehicle lamp of the present invention includes a flange portion provided at the periphery of the opening of the housing, a step portion provided on the inner surface of the periphery of the lens abutting the flange portion, and the step portion A fixing member having an embedded part is embedded from the back surface of the flange part by ultrasonic vibration or the like, and the peripheral part and the flange part are joined together, and a sealant is applied to the joined part to reinforce and seal the lens and the housing. Because it is fixed, there is no need for a boss or pin to protrude from the lens like in conventional vehicle lights, and there is no need for a mounting flange on the housing, so the structure of the lens and housing is simple. It is easy to mold, and the shape of lenses etc. can be designed freely.

In addition, the lens can be reinforced and sealed at the same time on the back side of the housing, so there are no issues with appearance, space, or light distribution, and the seal and reinforcement between the lens and housing can be jointed and fixed on the outer periphery. This has effects such as being able to expand the light emitting area of the lens.

It should be noted that, as a matter of course, the vehicular lamp of the present invention is not limited to the above-described embodiments.

[Brief explanation of the drawing]

1 and 2 are cross-sectional views showing a conventional example, and FIGS. 3 to 6 show an embodiment of the present invention. FIG. 4 is an enlarged view of the main part of the opening in FIG. 3, FIG. 5 is an explanatory diagram showing a state in which the lens and housing are joined, and FIGS. 6A to 6C are perspective views showing modified examples of the fixing member. . DESCRIPTION OF SYMBOLS 1... Housing, 11... Flange part, 2... Lens, 21... Peripheral part,
22...Stepped portion, 3...Light source bulb, 4
...Fixing member, 41...Embedded part, 42
...Head, 5...Sealant, 6...
... Sheet pack skin.

Claims (1)

[Scope of utility model registration request] A flange portion is provided at the periphery of the opening of the housing, a step portion provided on the inner surface of the periphery portion of the lens is abutted against the seven run portions, and a fixing member having an embedded portion is applied to the step portion from the back surface of the flange portion by ultrasonic vibration. A vehicular lamp characterized in that the lens and the housing are reinforced and sealed by embedding the peripheral edge portion and the flange portion, and applying a sealing agent to the joint portion.