JPH0127206Y2 - - Google Patents

Description

[Detailed description of the invention] <<Industrial application>> The present invention is applicable to at least a portion of the lens surface, such as in a rear combination lamp that is arranged in a structure that wraps around the corner from the rear side of the vehicle body. The present invention relates to a vehicular lamp having a curved portion, and particularly to improvements in its inner lens and its mounting structure.

<<Prior art>> As one of the rear combination lamps, a plurality of outer lenses having different predetermined light colors are attached to the front of the housing to define a plurality of light chambers, and lamp bulbs are installed in these light chambers. In addition, a lamp bulb in which an inner lens is disposed in front of the lamp bulb is known.

In this rear combination lamp, the light from each lamp bulb becomes parallel light by the Fresnel prism formed on the inner surface of the inner lens.
This parallel light is diffused by a fisheye prism formed on the outer lens and emitted to the outside.

Another known rear combination lamp is one in which the outer lens is colorless or transparent with a light smoke tone, and the inner lens is colored in the respective lamp colors. In this rear combination lamp, a Fresnel prism is formed on the inner surface of the inner lens, and a fisheye prism is formed on the outer surface of the inner lens to obtain appropriate diffused light.

≪Problems to be solved by the invention≫ By the way, among the various rear combination lamps mentioned above, there are known ones that have a structure that wraps around the rear corner of the car body so that a part of the lens surface faces the side of the car body. It is being That is, in this rear combination lamp, each lens is curved and extended to follow the shape of the corner portion of the vehicle body.

However, when the inner lens is curved into an arcuate shape, there is a problem in that it is difficult to form a Fresnel prism on this arcuate surface in terms of resin molding.

Therefore, an object of the present invention is to provide a vehicle lamp in which a Fresnel prism can be easily formed in the curved portion of the inner lens.

≪Means for solving the problem≫ In order to solve the above-mentioned problem, the vehicle lamp of the present invention is arranged in a double structure in the front opening of the housing, and is arranged from the flat part to one side. A vehicular lamp comprising an inner lens and an outer lens each having a curved portion, wherein the inner lens includes a flat lens portion, a frame extending from the flat lens portion to form the curved portion, and the frame. It is characterized by consisting of a thin plate-shaped curved lens part fixed along the back surface of the body.

<<Operation>> The flat lens part and the curved lens part of the inner lens form a Fresnel prism in a flat state, and the curved lens part is fixed to the frame body in a bent state and attached to the housing. , is held in a predetermined shape corresponding to the outer lens.

<<Embodiment>> Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings, in which the present invention is configured as a rear combination lamp in which signal lights disposed at the rear of the vehicle body are integrated.

As shown in FIG. 1, the rear combination lamp according to this embodiment has a nearly colorless and transparent outer lens 2 attached to the front opening of the housing 1, and a back cover 4 attached to the rear part of the housing 1 to form a plurality of lamp chambers. Lamp bulbs 5 are installed inside these lamp chambers, and an inner lens 6 having a lamp color of each signal lamp is arranged in front of each lamp bulb 5. This rear combination lamp has a part (the left part in FIG. 1) that is curved around the rear corner of the vehicle body, and each lens 2, 6 is curved in an arc shape.
The lens surface faces the side of the vehicle.

The housing 1 is formed by resin molding, and is attached to a vehicle body panel 8 by screws or the like via a packing 7 on the peripheral edge. This housing 1 has an annular groove 9 for attaching an outer lens 2 formed on the outer periphery of the front opening. Further, on both sides of the inner wall of the housing 1,
As shown in FIG. 2, grooves 10 are formed inside the groove 9 in parallel. This groove 10 is for attaching the frame 14 to which the inner lens 6 is attached.

The outer lens 2 is made of a transparent synthetic resin, and contains a certain amount of carbon, for example, so that it has a light smoke-like transparency. These outer lenses 2 are prism-less with only decorative unevenness formed on a part, and the part placed on the rear side of the car body is formed substantially flat, and the part placed on the corner part of the car body. The curved portion is formed into an arc shape along the shape of this corner portion. These outer lenses 2
An annular leg portion 11 is formed on the inner peripheral edge of the adhesive.
It is designed to be fixed by 2.

Further, as shown in FIG. 1, the inner lens 6 includes a flat lens portion 15 disposed corresponding to a flat portion of the outer lens 2, and a
Curved lens portion 1 arranged corresponding to the curved portion of
6.

The flat lens portion 15 is made of transparent synthetic resin having a predetermined lamp color, and as shown in FIG.
It is formed integrally with the frame 14. A Fresnel prism for refracting the light from the lamp bulb 5 into parallel light is integrally formed on the back surface of the flat lens portion 15. Further, a fisheye prism is integrally formed on the surface of the flat lens portion 15 to appropriately diffuse the parallel light.

Further, the curved lens portion 16 is also made of a transparent synthetic resin having a predetermined lamp color, that is, the same lamp color as the flat lens portion 15. Further, the curved lens portion 16 is formed into a flat thin plate shape having a wall thickness of, for example, about 0.5 mm, and is flexible. This curved lens portion 16
A Fresnel prism for refracting the light from the lamp bulb 5 into parallel light is integrally formed on the back surface of the lamp. This Fresnel prism is
The shape at the time of molding is calculated in advance so that each prism surface forms an appropriate angle when the curved lens portion 16 is curved into a predetermined arc shape. Further, a fisheye prism is integrally formed on the surface of the curved lens portion 16 to appropriately diffuse the parallel light.

Further, nine mounting holes 16a and four notches 16b are formed in this curved lens portion 16. The mounting holes 16a are arranged in a matrix of 3 rows and 3 columns in the substantially rectangular curved lens portion 16, and each has a major axis extending from one end in contact with the flat lens portion 15 of the curved lens portion 16 to the other end. It has become a thing. Further, the cutout portion 16
b are rectangular parts cut from both side edges of the curved lens part 16, and two are formed on each side.

Then, this curved lens portion 16 is connected to the frame body 1.
It is designed to be installed on 4.

This frame body 14 includes three beams 17 integrally formed on both sides of the flat lens portion 15 and an intermediate portion thereof.
and a connecting portion 18 that connects these beams 17 to the flat lens portion 15 on the opposite side. In other words, each of the beams 17 is formed in parallel on the surface of the flat lens portion 15, and has a flat portion and a curved portion connected to each other along the inner surface shape of the outer lens 2.
A curved portion extends toward the curved lens portion 16 from the flat portion integrated with the flat lens portion 15, and a connecting portion 18 provided at the tip of this curved portion is located at a corner of the lamp chamber. Three protrusions 19 are formed on the back surface of the curved portion of each beam 17 extending from the flat lens portion 15 to be inserted into the attachment hole 16a formed in the curved lens portion 16. The protrusions 19 pass through each of the mounting holes 16a, and the ends of the protrusions 19 are crushed into a substantially rivet shape by cold caulking, high frequency heating, etc., as shown in FIG. As a result, the curved lens portion 16 is fixed in a predetermined arc shape along the back surface of the beam 17.

Furthermore, leg pieces 21 for attaching the frame body 14 to the housing 1 are formed on the back surfaces of the beams 17 on both sides. Two leg pieces 21 are formed on each side, and are inserted into a notch 16b formed in the curved lens part 16 and further protrude to the back side, as shown in FIG. It is adapted to be inserted into the groove portion 10. and,
This groove 10 is filled with an adhesive 22 such as hot melt.
is injected, thereby fixing the leg pieces 21 and attaching the frame 14 to the front surface of the housing 1.

As described above, the flat lens portion 15 and the curved lens portion 16 of the inner lens 6 are joined via the frame 14, and are attached to the housing 1 by the frame 14, and are attached to the outer lens 2. Arranged in a double structure. That is, the inner lens 6 is formed into a predetermined curved shape that approximates the outer lens 2 and is fixed by holding the curved lens portion 16 in an arcuately bent state.

Further, each beam 17 of the frame body 14 is arranged in parallel inside the outer lens 2, and functions as a louver for decoration and for preventing false lighting. That is, the beams 17 arranged in parallel to each other are visible from the outside in a striped manner through the substantially colorless and transparent prismless outer lens 2, thereby improving the aesthetic appearance of the front surface of the lamp. Moreover, these beams 17 block sunlight (dotted dotted line A in FIG. 2) that enters the front surface of the lamp obliquely from above on the front surface of the inner lens 6. This prevents sunlight from being directly reflected forward by the inner lens 6, and also prevents light emission from the inner lens 6 due to this reflected light, that is, false lighting of the lamp.

By the way, since the curved lens portion 16 is formed thin, it is difficult to form a louver by integral molding like a general thick inner lens. Therefore, by using the frame body 14 as a louver as described above, it is possible to obtain a decorative effect and a false lighting prevention effect even in the thin curved lens portion 16.

In addition, in the embodiment described above, the curved lens portion 16
was fixed by crushing the protrusion 19 provided on the frame 14. However, this fixing method includes, for example, high-frequency welding or other adhesives to the back surface of the frame 14 and the curved lens portion 16. It may be twisted and fixed directly.

Further, the method of fixing the frame body 14 to the housing 1 is not limited to the above embodiment, and may be, for example, screwing, high frequency welding, or the like.

Furthermore, the structure of the frame 14 may include four or more beams, and the specific shape can be selected as appropriate.

Further, the present invention is applicable not only to the above-mentioned rear combination lamp but also to a wide range of vehicle lamps including an inner lens having a partially curved portion.

<<Effects of the Invention>> According to the invention, a Fresnel prism can be easily formed on the curved portion of the inner lens on the flat surface of the flexible curved lens portion.

Furthermore, since the curved lens part is fixed along a separate frame body and this frame body is attached to the housing, the flexible curved lens part can be easily handled and the installation work can be simplified. .

Furthermore, the frame holding the inner lens can be formed as a louver for decoration of this vehicle lamp and for preventing false lighting, so even if the curved lens part is temporarily formed to be thin, it can be integrated with it. It is possible to obtain the decorative effect and the effect of preventing false lighting without forming a louver.

[Brief explanation of the drawing]

FIG. 1 is a partial cross-sectional view showing a rear combination lamp according to an embodiment of the present invention; FIG. 2 is a longitudinal cross-sectional view showing the rear combination lamp;
FIG. 3 is an exploded perspective view showing the inner lens of the rear combination lamp and the frame for fixing the inner lens to the housing, and FIG. 4 shows the state in which the curved lens part of the inner lens is fixed to the frame. FIG. 1...Housing, 2...Outer lens, 6...
... Inner lens, 10 ... Groove, 14 ... Frame,
15... Flat lens part, 16... Curved lens part,
17...Beam, 19...Protrusion, 21...Leg piece, 22
……glue.

Claims (1)

[Scope of utility model registration request] A vehicular lamp comprising an inner lens and an outer lens arranged in a double structure in a front opening of a housing and each having a curved part from a flat part toward one side, the inner lens having a flat lens part. A vehicular lamp comprising: a frame body extending from the flat lens part to form the curved part; and a thin plate-like curved lens part fixed along the back surface of the frame body.