JPH0419682Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a vehicular lamp having a double lens structure. Specifically, the present invention relates to a vehicle lamp that includes a thin and flexible inner lens, a retroreflective prism body integrated with the inner lens, and an outer lens.

[Conventional technology]

BACKGROUND ART Today, among vehicle lamps having a double lens structure, those having a winding portion are widely used due to design reasons. In the case of a vehicular lamp having a double lens structure having this recessed portion, a thin and flexible inner lens having an integral retroreflection prism is used.

Hereinafter, this type of vehicle lamp will be explained with reference to FIGS. 4 to 7.

In the figure, 1 is a housing, which has a recess 10 at one end, a recess 11 in the middle, and an adhesive recess 12 for the inner lens and an adhesive recess 13 for the outer lens at the periphery. .

Reference numeral 2 denotes a thin and flexible inner lens, and as shown in FIG. valve 4
A Fresnel prism 20 and a retroreflection prism 21 are provided together on one surface (a surface facing the other surface), and an adhesive leg portion 22 is provided on the peripheral edge. The inner lens 2 has a wall thickness of about 0.8 to 1.0 mm at the Fresnel prism 20 portion, and the wall thickness of the retroreflection prism 21 is about 1.8 mm because if it is too thin, sufficient retroreflection performance cannot be obtained. One end portion of the inner lens 2 is curved to follow the winding portion 10 of the housing 1, and the adhesive leg portion 22 of the inner lens 2 is adhered to the adhesive recess 12 for the inner lens of the housing 1 in that state.

Reference numeral 3 designates an outer lens, and this outer lens 3 has a prism engraved thereon, or is a transparent lens without a prism engraved thereon, and has a rounded part at one end that is curved to follow the rounded part 10 of the housing 1. 30 and adhesive legs 31 provided on the peripheral edge. The adhesive leg portion 31 of the outer lens 3 is adhered to the adhesive recess 13 for the outer lens of the housing 1.

In addition, although the above-mentioned outer lens 3 is not colored with smoke and the inner lens 2 is colored here, it is not necessarily limited to this.

4 is a valve detachably attached to the recess 11 of the housing 1.

In such a vehicle lamp, when the bulb 4 is turned on, the light from the bulb 4 reaches the inner lens 2, and the Fresnel prism 20 of the inner lens 2
parallel to the optical axis (or inner lens 2
The light can be diffused by carving a fisheye prism on its surface. )
Irradiated from the inner lens 2 to the outer lens 3,
The light is irradiated forward through this outer lens 3.

Furthermore, when light from the outside reaches the inner lens 2 through the outer lens 3, it is retroreflected by the retroreflection prism 21 of the inner lens 2, and the retroreflected light is irradiated forward through the outer lens 3. The presence of the vehicle is recognized.

[Problem that the invention attempts to solve]

However, in the above-mentioned conventional vehicle lamp, the Fresnel prism 20 and the retroreflective prism 21 are integrally molded in the inner lens 2, so as mentioned above, the basic wall thickness of the Fresnel prism 20 is approximately 0.8~1.0mm, retroreflective prism 2
The basic wall thickness of 1 is about 1.8mm, and Fresnel prism 2
0 and the retroreflective prism 21 are integrally molded into a concave and convex shape, the apex portion 23 of the retroreflective prism 21 will change as shown in FIG. (indicated by the two-dot chain line) is not filled with the material of the inner lens 2. A so-called unfilled portion occurs. As a result, there are problems such as insufficient retroreflection performance of the retroreflection prism 21.

The purpose of this invention is to obtain sufficient retroreflective performance of a retroreflective prism, have high strength against vibrations of the integrated inner lens and retroreflective prism body, and have a simple shape for the inner lens that can be easily molded. The object of the present invention is to provide an easy-to-use vehicle lamp.

[Means for solving problems]

In the present invention, a thin and flexible inner lens and a retroreflective prism body are individually molded, a through hole is formed in the inner lens, and a hollow convex portion is provided in the retroreflective prism body to be inserted into the through hole. At the same time, a retroreflection prism is provided in the hollow convex portion, and a substrate is provided around the hollow convex portion,
Inserting the hollow convex portion of the retroreflective prism body into the through hole of the inner lens, and fixing one surface of the substrate of the retroreflective prism body against one surface of the edge of the through hole of the inner lens, It is characterized in that the inner lens and the retroreflective prism body are integrated.

[Effect]

In the present invention, by forming the inner lens and the retroreflective prism separately, the apex corner of the retroreflective prism is also sufficiently filled with material. By inserting this retroreflective prism into the through hole of a separately molded inner lens and integrating the inner lens and the retroreflective prism, the retroreflective prism and the inner lens, which have sufficient retroreflection performance, are integrated. is obtained.

Further, in the present invention, the inner lens and the retroreflective prism body are integrated by fixing one surface of the edge of the through hole of the inner lens and one surface of the substrate of the retroreflective prism body in a flush state. Therefore, the fixed part has high strength against vehicle vibrations. Therefore, even if a thin and flexible inner lens is used, it can sufficiently withstand vehicle vibrations.

Further, in the present invention, the shape of the inner lens is simple because the inner lens is simply provided with a through hole for inserting the retroreflective prism body. As a result, even if the inner lens is thin and flexible, it is easy to mold the inner lens.

〔Example〕

Hereinafter, two examples of the vehicle lamp according to the present invention will be described with reference to FIGS. 1 to 3.

1 and 2 show a first embodiment of a vehicle lamp according to the present invention, and FIG. 1 is a partial perspective view of an inner lens integrated with a retroreflective prism body;
FIG. 2 is a sectional view taken along the - line in FIG. 1.

In the figure, 5 is a thin and flexible inner lens, and this inner lens 5 has a Fresnel prism (not shown) on the back surface, and a rectangular through hole 50.
8 will be opened.

6 is a retroreflective prism body, and this retroreflective prism body 6 has a rectangular hollow convex portion 6 on the surface of the substrate 60.
1 is provided integrally protruding forward in correspondence with the through hole 50 of the inner lens 5. A retroreflection prism 62 is carved on the back surface of the horizontal portion 63 of the hollow convex portion 61. The height of the raised portion 64 of this hollow convex portion 61 is made larger than the thickness of the inner lens 5.

Thus, the hollow convex portion 61 of the retroreflective prism body 6 described above is inserted into the through hole 50 of the inner lens 5, and the surface of the substrate 60 of the retroreflective prism body 6 is brought into close contact with the back surface of the inner lens 5 to prevent this retroreflection. The surface of the substrate 60 of the prism body 6 and the inner lens 5
The inner lens 5 and the retroreflective prism body 6 are integrated by ultrasonic welding or the like while the inner lens 5 and the retroreflective prism body 6 are in contact with the back surface of the lens.

The vehicle lamp of the present invention has the above-mentioned configuration, that is, the inner lens 5 and the retroreflective prism body 6 are molded separately, and the inner lens 5 and the retroreflective prism body 6 are integrated. Even if the inner lens 5 is thin, the apex corner of the retroreflective prism 62 of the retroreflective prism body 6 is also sufficiently filled with the material. As a result, by integrating the above-mentioned retroreflective prism body 6 with the separately molded inner lens 5, it is possible to obtain an integral structure in which the retroreflective prism body 6 and the inner lens 5 have sufficient retroreflection performance. Therefore, sufficient retroreflection performance of the retroreflection prism can be obtained.

In addition, the vehicle lamp of the present invention has an inner lens 5
The inner lens 5 and the retroreflective prism body 6 are integrated by fixing one surface of the edge of the through hole 50 and one surface of the substrate 60 of the retroreflective prism body 6, so that the inner lens 5 and the retroreflective prism body 6 are integrated. The fixed part has high strength against vehicle vibrations. Therefore, even if a thin and flexible inner lens 6 is used, it can sufficiently withstand the vibrations of the vehicle.

Furthermore, since the vehicle lamp of the present invention has only a through hole 50 for inserting the retroreflective prism body 6 into the inner lens 5, the shape of the inner lens 5 is simple. As a result, even if the inner lens 5 is thin and flexible, it is easy to mold the inner lens 5.

FIG. 3 is a partial sectional view of an inner lens and a retroreflective prism body showing a second embodiment of the vehicle lamp according to the present invention.

In the figure, the same reference numerals as in FIGS. 1 and 2 indicate the same parts. In this embodiment of the vehicle lamp of the present invention, the raised portion 64 of the hollow convex portion 61 of the retroreflective prism body 6 is inclined to have a wide base.

With this configuration, the effective area W of the retroreflective prism 62 is wider than the effective area W of the retroreflective prism 62 in which the raised portion 64 is vertical in the same area of the horizontal portion 63 of the hollow convex portion 61.

In the above embodiment, the hollow convex portion 61 of the retroreflective prism body 6 slightly protrudes from the surface of the inner lens 5, but this is a design problem and there is no need to make it protrude. 5 and the retroreflective prism body 6 may be flush with each other.

Further, although the hollow convex portions 61 of the retroreflective prism body 6 are rectangular and number eight in number, the shape and number thereof are not particularly limited. For example, it may be a circle, a triangle, or one piece.

[Effect of idea]

As is clear from the above, in the vehicle lamp of the present invention, the inner lens and the retroreflective prism body are molded separately, and the inner lens is integrated with the retroreflective prism body. Even if the material is thin, the apex corner of the retroreflective prism of the retroreflective prism body is sufficiently filled with the material. As a result, sufficient retroreflection performance of the retroreflection prism can be obtained.

In addition, in the present invention, one surface of the edge of the inner lens through-hole is fixed flush with one surface of the substrate of the retroreflective prism body, so the fixed portion is strong against vibrations of the vehicle. It's large. Therefore,
Even if a thin and flexible inner lens is used, it can withstand vehicle vibrations sufficiently.

Furthermore, in the present invention, the shape of the inner lens is simple because only a through hole for inserting the retroreflective prism body is provided in the inner lens. As a result, even if the inner lens is thin and flexible, it is easy to mold the inner lens.

[Brief explanation of the drawing]

1 and 2 show a first embodiment of a vehicle lamp according to the present invention, FIG. 1 is a partial perspective view of an inner lens integrated with a retroreflective prism, and FIG. It is a - line sectional view in a figure. FIG. 3 is a partial sectional view of an inner lens and a retroreflective prism body showing a second embodiment of the vehicle lamp according to the present invention. Fig. 4 is a front view of a conventional vehicle lamp, Fig. 5 is a sectional view taken along the line V-V in Fig. 4, Fig. 6 is an enlarged sectional view of the part shown in Fig. 5, and Fig. 7 is a retroreflector. FIG. 3 is an explanatory diagram showing a state in which an unfilled portion occurs at the apex corner of the prism. 5...Inner lens, 50...Through hole, 6...Retroreflective prism body, 60...Substrate, 61...Hollow convex portion, 62...Retroreflective prism, 63...Horizontal part, 64...Rise part .

Claims (1)

[Scope of utility model registration request] In a vehicle lamp equipped with a thin and flexible inner lens, a retroreflective prism body, and an outer lens, the inner lens and the retroreflective prism body are individually molded, and the inner lens has a through hole. The retroreflective prism body includes a hollow convex portion inserted into the through hole, a retroreflective prism provided in the hollow convex portion, and a retroreflective prism body provided around the hollow convex portion, with one surface on one side of the edge of the through hole. A vehicular lamp comprising a substrate that is fixed in a face-to-face state to integrate the inner lens and a retroreflective prism body.