JPH0127208Y2 - - 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, there is a known rear combination lamp of this kind that wraps around the rear corner of the vehicle body so that part of the lens surface faces the side of the vehicle body. There is. 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 arc shape, it is difficult to form a Fresnel prism on this arc surface in terms of resin molding. For this reason, in the past, the inner lens was bent at several points to form a polygonal shape similar to the arcuate surface of the outer lens, and a Fresnel prism was formed for each flat surface.

However, when a polygonally curved inner lens is provided, the ridgeline of the bent portion of the inner lens can be seen from the outside through the outer lens, which impairs the aesthetic appearance of the curved portion of the rear combination lamp. There were flaws that caused damage. In particular, in the case of the above-described colorless or light smoke-like outer lens, the crease line of the inner lens is more clearly visible.

Therefore, in this invention, the curved part of the inner lens is
To provide a vehicular lamp in which a Fresnel prism of a curved part can be easily formed without making it multifaceted, and an inner lens can be easily attached.

<Means for Solving the Problems> In order to solve the above-mentioned problems, the vehicle lamp of the present invention has inner lenses arranged in a double structure in the front opening of the housing and each having at least a portion curved. A vehicular lamp comprising an outer lens, wherein the inner lens is formed into a thin plate shape and is fixed along the back surface of a frame body formed in a curved shape corresponding to the outer lens. .

<<Operation>> The inner lens, which is formed into a Fresnel prism in a flat state, is bent and fixed to the frame, and by fixing this frame to the housing, it is kept in a predetermined shape and held in the lamp chamber. .

<<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 substantially colorless and transparent outer lenses 2 and 3 attached to the front opening of the housing 1, and a back cover 4 attached to the rear of the housing 1 to accommodate a plurality of lights. A lamp bulb 5 is mounted inside the lamp chamber, and an inner lens 6 having a color of the lamp 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 outer lenses 2 and 3 formed on the outer periphery of the front opening. Further, on both sides of the inner wall of the housing 1, grooves 10 are formed in parallel to the inside of the groove 9, as shown in FIG. This groove 10
is for attaching the frame 14 to which the inner lens 6 is attached.

The outer lenses 2 and 3 are made of transparent synthetic resin, and are made transparent with a light smoke tone by containing a certain amount of carbon, for example. These outer lenses 2 and 3 are
It is prism-less with only decorative irregularities formed on a portion thereof, and a portion thereof is curved into an arc shape along the shape of the rear corner portion of the vehicle body. An annular leg portion 11 is formed on the inner peripheral edge of these outer lenses 2 and 3, and this leg portion 11 is inserted into the groove portion 9, and an adhesive 12 such as hot melt is injected into the groove portion 9. It is now fixed in place.

Further, the inner lenses 6 are each made of a transparent synthetic resin having a predetermined lamp color, for example.
It is formed into a flat thin plate shape with a wall thickness of about 0.5 mm, and is flexible. This inner lens 6
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
Each prism surface is formed by calculating the shape at the time of molding in advance so that it forms an appropriate angle when the inner lens 6 is curved. Furthermore, a fisheye prism is integrally formed on the surface of the inner lens 6 to appropriately diffuse the parallel light.

Furthermore, this inner lens 6 has nine mounting holes 6a and four notches 6, as shown in FIG.
b is formed. The mounting holes 6a are arranged in a matrix of 3 rows and 3 columns in the inner lens 6, and each has a major axis along the longitudinal direction of the inner lens 6, that is, from one end to the other end. Further, the cutout portions 6b are rectangular cut out from both side edges of the inner lens 6, and two cutout portions are formed on each side.

Additionally, a frame body 14 to which the inner lens 6 is fixed is provided.
is made of synthetic resin and has a substantially square-shaped outer frame 15 corresponding to the inner wall shape of the housing 1, and a beam 16 constructed within this outer frame 15 from one end to the other end.
It is integrally formed with. Both side parts 15a and both sides 16 of the outer frame 15 are arranged parallel to each other, and a part thereof is curved into an arc shape corresponding to the formation of the outer lenses 2 and 3,
When this frame body 14 is attached to the housing 1,
It is arranged to be located along the inner surfaces of the outer lenses 2 and 3.

Furthermore, both sides 15a of the outer frame 15 and the beam 1
Nine protrusions 17, which are inserted into the attachment holes 6a of the inner lens 6, are formed on the back surface of the inner lens 6. The protrusion 17 passes through the mounting hole 6a, and its penetrating end is crushed into a substantially rivet shape by cold caulking, high frequency heating, etc., as shown in FIG. Thereby, the inner lens 6 is fixed in a bent state along the back surface of the frame body 14.

Further, leg pieces 1 for attaching the frame 14 to the housing 1 are provided on both sides 15a of the frame 14.
8 is formed. Two leg pieces 18 are formed on each side, and are inserted into the notch 6b formed in the inner lens 6, and further protrude toward the back side, and as shown in FIG. 10. An adhesive 19 such as hot melt is injected into the groove 10, thereby fixing the leg pieces 18 and attaching the frame 14 to the front surface of the housing 1.

As described above, the inner lens 6 is attached to the frame 14 with a part curved in an arc shape,
By fixing this frame 14 within the housing 1, it is arranged in a double structure with respect to the outer lenses 2 and 3. The inner lens 6 attached at one end is thin and lightweight, and has little inertia due to vibrations, etc., so it does not easily come off and is strongly fixed.

In addition, both sides 15a of the frame 14 and the beam 16
are arranged in parallel inside the outer lenses 2 and 3, and function as decorative louvers and for preventing false lighting. That is, the side edges 15a and the beams 16, which are arranged in parallel with each other, are visible from the outside in a stripe shape through the substantially colorless and transparent prismless outer lenses 2 and 3, which improves the aesthetic appearance of the front surface of the lamp. improve. Further, these side edge portions 15a and beams 16 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 also prevents sunlight from being directly reflected forward by the inner lens 6, and the inner lens 6 due to this reflected light.
It is also possible to prevent light emission, that is, false lighting of the lamp.

By the way, since the inner lens 6 is formed thin, it is difficult to form a louver by integral molding like a general thick inner lens. Therefore, by using the frame 14 as a louver as described above, even the thin inner lens 6 can have a decorative effect and a false lighting prevention effect.

In addition, in the embodiment described above, the inner lens 6
was fixed by crushing the protrusion 17 provided on the frame 14. However, this fixing method includes, for example, bonding the back surface of the frame 14 and the inner lens 6 by high-frequency welding or other adhesive. It is also possible to attach the film directly to the film.

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 a plurality of beams, and the specific shape can be selected as appropriate.

Further, the present invention can be widely applied not only to the above-mentioned rear combination lamp but also to a wide range of vehicular lamps including an inner part having a curved portion.

<<Effect of the invention>> According to the invention, a Fresnel prism can be easily formed on the flat surface of the inner lens, and the inner lens can be bent and attached to the housing via the frame. The curved portion of this inner lens can be easily formed into an arc shape. Therefore, the ridge lines formed by the multifaceted curved portions are not seen through to the outside, and the aesthetic appearance is not impaired by the ridge lines.

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

[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 a frame for fixing the inner lens to the housing, and FIG. 4 is a main part showing how the inner lens is fixed to the frame. FIG. 1... Housing, 2, 3... Outer lens,
5... Lamp bulb, 6... Inner lens, 6a
...Mounting piece, 10...Groove, 14...Frame, 1
5...Outer frame, 16...Beam, 17...Protrusion, 18...
...Leg piece, 19...Adhesive.

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 at least a portion curved, the inner lens being formed in a thin plate shape,
A vehicle lamp, characterized in that the vehicle lamp is fixed along the back surface of a frame formed in a curved shape corresponding to the outer lens.