JPH0623108U - Vehicle lamp protector structure - Google Patents

Abstract

(57) [Summary] [Purpose] To improve the mounting structure of the protector in vehicle lighting, eliminate the need for ultrasonic bonding and the use of adhesives, and increase the degree of freedom in designing the product shape. [Structure] The lamp housing 5 and the lens 6 are molded from a synthetic resin material, which is placed in molds 8 and 9 to form a cavity 1.
A protector 7 is molded by injecting a molten synthetic resin material into the protective layer 7. As the material of the protector 7, a material having thermal welding property to both the lamp housing 5 and the lens 6 is selected and used.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a protector which is interposed between a vehicle lamp and a vehicle body when the lamp is mounted on the vehicle body.

[0002]

[Prior art]

 FIG. 4 is an explanatory view of a protector structure according to a conventional example. A light source bulb 2 is attached to the lamp housing 1. A lens 3 is arranged so as to cover the light source bulb and is fixed to the lamp housing 1. The protector 4 is constructed separately from the above and is mounted at the 4'position as indicated by the arrows a and a '. The lamp housing 1 and the lens 3 are generally made of synthetic resin, and the protector 4 is made of synthetic resin having rubber-like elasticity. Then, the lamp housing 1 and the lens 2 are ultrasonically bonded, and the protector 4 is bonded thereto by an adhesive (for example, an instantaneous adhesive).

[0003]

[Problems to be solved by the device]

 The conventional example shown in FIG. 4 has the following problems. a. Since the assembly work involves ultrasonic bonding process, the number of man-hours required for assembly is large, and moreover, ultrasonic bonding equipment is required for the assembly line.In addition, it is difficult to completely bond the ultrasonic bonding part, and it is difficult to remove water from the defective part of the ultrasonic bonding. There is no risk of intrusion. b. There are variations in the bonding quality of the protector bonding part, the bonding reliability of the protector is low, and in addition, the bonding work requires a high level of skill and a great deal of labor. c. Since the pre-configured protector can be assembled to the assembly of the lamp housing and the lens, the shape of the assembly is restricted and the degree of freedom in design is low. The present invention has been made in view of the above circumstances, and eliminates the above problems a to c. Since the work of ultrasonically bonding the lamp housing and the lens is not required, there is no possibility of causing problems such as water penetration due to defects in ultrasonic bonding. Since it is not necessary to fit or bond the protector, the assembling work is easy, and c. It is an object of the present invention to provide a protector structure for a vehicle lamp, which has a large degree of freedom in designing the product shape because a ready-made protector is not fitted.

[0004]

[Means for Solving the Problems]

 The principle of the structure according to the present invention created to achieve the above object will be briefly described below with reference to FIG. 2 corresponding to the embodiment. That is, the lamp housing 5 and the lens 6 are molded with a synthetic resin material, and these are combined and inserted into the mold (A) 8 and the mold (B) 9, and the cavity 10 is filled with the thermoplastic elastomer. The protector is molded by injecting it to form the protector 7 as shown in FIG. Based on the above-mentioned principle, the structure of the present invention provides a protector for a synthetic resin lamp housing of a vehicle lamp, which is equipped with a light source bulb and a synthetic resin lens for covering the light source bulb. In the mounting structure, the protector having a shape that covers the outer periphery of the contact portion between the lens and the lamp housing is integrally formed of a synthetic resin material having heat-welding properties for both the lens and the lamp housing. And

[0005]

[Action]

 According to the above configuration, the protector is molded without the need for ultrasonic bonding operation or adhesive bonding operation, and the protector mechanically connects the lamp housing and the lens and performs a sealing function. Prevent ingress of water.

[0006]

【Example】

 FIG. 1A is a schematic cross-sectional view showing a vehicular lamp including an embodiment of a protector structure according to the present invention. The lamp housing 5 of this example is injection-molded by ABS, and the lens 6 is injection-molded by PMMA. The lamp housing 5 and the lens 6 are simply brought into contact with each other without being fixed to each other by ultrasonic bonding or an adhesive. Since the above-mentioned contact portion has an annular shape, the protector 7 is formed so as to cover the outer periphery thereof by applying the insert molding technique. That is, the lamp housing 5 and the lens 6, which are injection-molded in advance, are sandwiched between the mold (instep) 8 and the mold (exhibit B) 9 as shown in FIG. 2, and the synthetic resin material is injected into the cavity 10. And mold. In this case, the protector material is selected to have heat-welding properties for both the lamp housing 5 material and the lens 6 material. In this example, styrene-based TPE (specifically, Tuftec S2952 (trade name) manufactured by Asahi Kasei Corporation) was used. For example, when the lamp housing is made of ABS, AES, or AAS, and the lens is made of PMMA, AS, or PC, there are three types of housing materials and three types of lens materials. The styrene-based TPE is suitable for nine kinds of combinations because it has heat-welding properties and has appropriate rubber-like elasticity. However, the material for the protector in the case of implementing the present invention is not limited to styrene-based TPE, and it is possible to appropriately select and use a material having a heat-welding property for both the lamp housing and the lens. it can. In addition, in order to fulfill the function as a protector, it is desirable that the material has appropriate rubber-like elasticity.

The protector structure of the present embodiment does not have a preformed protector fitted separately from the lamp housing and the lens as in the conventional example shown in FIG. 4, so the shape of the lamp housing and the lens will not be described. The degree of freedom in design is high, with no particular restrictions. Further, since the protector 7 is welded to the lamp housing 5 and the lens 6, respectively, it serves as a sealing function between both members, and there is no risk of causing problems such as water intrusion. Further, unlike the conventional example shown in FIG. 4, the work of fitting and adhering the ready-made protector 4 as shown by arrows a and a'is not necessary. In the case of implementing the present invention, since the mechanical connection between the lamp housing and the lens and the sealing are performed by the protector, it is sufficient that the lamp housing and the lens are simply brought into contact with each other without being bonded or joined. However, workability is good if they are engaged so that they can be easily positioned relative to each other. FIGS. 3A to 3F are schematic sectional views showing embodiments different from the above, showing various configurations of the contact portion between the lamp housing 5'and the lens 6 '.

[0008]

As described above with reference to the embodiments, the protector structure according to the present invention has the following advantages. Since the work of ultrasonically bonding the lamp housing and the lens is not required, there is no possibility of causing problems such as water penetration due to defects in ultrasonic bonding. Since it is not necessary to fit or bond the protector, the assembling work is easy, and c. Since it does not fit a ready-made protector, it has a great practical effect that the degree of freedom in designing the product shape is great.

[Brief description of drawings]

FIG. 1 is a protector structure 1 for a vehicle lighting device according to the present invention.
It is a typical sectional view showing an example.

FIG. 2 is a cross-sectional view of a mold for explaining a method of constructing the protector in the above embodiment.

3 (A) to (F) are cross-sectional views of a main part in an embodiment different from the above.

FIG. 4 is a cross-sectional view for explaining a protector structure of a vehicular lamp and a problem in a conventional example.

[Explanation of symbols]

1 ... Lamp housing, 2 ... Light source bulb, 3 ... Lens,
4 ... Protector, 5, 5 '... Lamp housing, 6,
6 '... lens, 7 ... protector, 8 ... mold (instep), 9 ...
Mold (Otsu), 10 ... Cavity.

Claims (1)

[Scope of utility model registration request] 1. A structure in which a protector is attached to a synthetic resin lamp housing of a vehicle lamp having a light source bulb and a synthetic resin lens covering the light source bulb, wherein the lens and the lamp housing are attached. A protector structure for a vehicular lamp, wherein a protector having a shape that covers an outer periphery of a contact portion with is integrally molded with a synthetic resin material having heat-welding properties for both the lens and the lamp housing.