JPH0773708A - Automotive lighting - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a lamp for a vehicle in which a certain shadow due to a flange or the like cannot be seen from the outer surface from the front of the vehicle. A housing 10, a lens 20 made of a transparent resin material, a flange 41 inserted into a groove 12 of an opening edge portion 11 of the housing 10 and fixed by a sealing member 30, and a substantially T-shaped cross section together with the flange 41. Member 40 made of an opaque resin material having a base portion 42 having the shape of
Is laminated on a part of the back surface of the lens 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of an automobile lamp.

[0002]

2. Description of the Related Art As a technique of this type, there is one shown in FIG. 3 (see Japanese Patent Laid-Open No. 2-160304). In the figure, 1 denotes a housing, 2 denotes a lens made of a transparent material, and a flange 5 of the lens 1 is inserted into a groove 4 of an opening edge portion 3 of the housing 1 and fixed by a seal member 6.

[0003]

However, in such an automobile lamp, the flange 5 is seen as a shadow 7 having a constant width locally through the lens 1 from the front of the automobile, which limits the shaping. Received, and improvement is desired. Further, as a countermeasure against this, even if the back surface of each of the position of the lens 2 corresponding to the position of the groove 4 and the flange 5 is coated, the flange 5 appears as a constant shadow 7 through the lens 2. Further, if the thickness and the depth of the flange 5 are reduced, the constant shadow 7 of the flange 5 becomes hard to see from the surface of the lens 2, but the coupling strength of the lens 2 with the housing 1 becomes weaker. Issues may arise. Therefore, it is an object of the present invention to provide a vehicle lamp in which a constant shadow due to a flange or the like cannot be seen from the outer surface of the front surface of the vehicle.

[0004]

According to a first aspect of the present invention, there is provided a vehicle lamp having a housing and a lens made of a transparent resin material, which is inserted into a groove at an opening edge of the housing. A back member made of an opaque resin material having a flange fixed by a sealing member and a base portion having a substantially T-shaped cross section together with the flange is laminated on a part of the back surface of the lens. According to a second aspect of the present invention, in accordance with the first aspect of the invention, an inclined portion is formed at a lens-side peripheral end of a base portion of the back member, and the lens back surface is welded to the inclined portion. According to a third aspect of the present invention, in response to any one of the first and second aspects, an uneven portion that is engaged with each other is formed on each laminated surface of the back member and the lens.

[0005]

According to the automotive lamp of claim 1, since the back member is made of the opaque resin material, a certain shadow is not locally visible through the lens, and the appearance is improved. In the vehicle lamp according to the second aspect of the invention, the light transmitting portion through which the light passes through the lens is reduced due to the inclined portion, the boundary between the transparent material portion and the opaque material portion is hard to see, and the appearance is improved. Further, since the welding area at the inclined portion is increased, the peel strength between the two becomes large. In the vehicle lamp according to the third aspect, the concave-convex portions of the back member and the lens that are engaged with each other enable a three-dimensional design and increase the degree of freedom in design.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to FIGS. 1 and 2, 10 is a housing, 20 is a lens made of a transparent resin material, 30 is a seal member, and 40 is a back member made of an opaque resin material. The back member 40 has a flange 41 and a cross section of approximately T together with the flange 41.
It has a base portion 42 having a character shape. The flange 41 is
It is inserted into the groove 12 of the opening edge portion 11 of the housing 10 and fixed to the housing 10 by the seal member 30. The base portion 42 of the back member 40 is formed by laminating the lens 20 on the surface side thereof. A projection 23 for positioning the end of the base 42 of the back member 40 is formed on a part of the lens 20. When molding the back member 40 and the lens 20, the back member 40 is molded by first injecting an opaque resin into the mold. Next, the mold is replaced and transparent resin is injected to weld the contact surface between the back member 40 and the lens 20. At this time, the opaque resin tries to spread due to the heat of the transparent resin, but the protrusion 23 functions as a weir to prevent the opaque resin from flowing in. The protrusion 23 also has a function of preventing leakage of light from a gap between the lens 20 and the housing 10. An inclined portion 43 is formed on the lens 20 side at the peripheral end of the base portion 42 of the back member 40 as shown in FIG. To be done. That is, the lens 20 is locally thickened accordingly.

Reference numeral 51 is a vehicle body, 52 is a lid for covering the upper portion of the lens 20, 53 is a bulb for a lamp, 54 is a cover for the lamp, and 55 is a partition member for covering the projection 23 of the housing 10 from the inside. According to this embodiment, the housing 10
Since the back member 40 fixed to the groove 12 is made of an opaque resin material, no local constant shadow can be seen through the lens 20, and the appearance is improved. Further, the light transmitting portion at the end portion of the lens 20 is reduced by the inclined portion 43, and the transparent material portion (lens 20) is seen both when viewed from above the lens (A1) and when viewed from diagonally below the lens (A2). ) And the opaque material portion (back member 40) are hard to see, and the appearance is improved. Moreover, since the welding area at the inclined portion 43 increases,
The peeling strength of both 20 and 40 is increased. FIG. 2 is a partial sectional view showing a laminated state of another embodiment of the lens and the back member. On the mutual laminated surface of the back member 40 and the lens 20,
Concavo-convex portions 44 and 22 which are engaged with each other are formed. Due to the concavo-convex portions 44 and 22 which are engaged with each other, not only the welding area is increased, but also a three-dimensional design is possible, and the degree of freedom in design can be increased.

[0008]

As described above, according to the automotive lamp of the present invention, since the back member is made of the opaque resin material, there is an effect that a local constant shadow cannot be seen through the lens and the appearance is improved. Further, when the inclined portion is formed on the back member, the transparent portion of the lens becomes small due to the inclined portion, the boundary between the transparent material portion and the opaque material portion is hard to see, the appearance is improved and the welding area at the inclined portion is improved. Is increased,
This has the effect of increasing the peel strength between the two. Furthermore, the concave-convex portions of the back member and the lens that are engaged with each other enable a three-dimensional design, which has the practical effect of increasing the degree of freedom in design.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an automobile lamp showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a laminated state of the lens of FIG. 1 and a back member.

FIG. 3 is a sectional view of a conventional example corresponding to FIG.

FIG. 4 is an enlarged view showing a peripheral edge of a base portion of the back member of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Housing 11 Opening edge of housing 12 Groove of opening edge 20 Lens made of transparent resin material 30 Sealing member 40 Back member made of opaque resin material 41 Flange of backing member 42 Base part of backing member

Claims (3)

[Claims] 1. A vehicle lamp having a housing and a lens made of a transparent resin material, the flange being inserted into a groove of an opening edge portion of the housing and being fixed by a sealing member, and a substantially T-shaped section together with the flange. An automotive lamp comprising a back member made of an opaque resin material and having a base portion having the shape of FIG. 2. The vehicle lamp according to claim 1, wherein an inclined portion is formed at a lens-side peripheral end of a base portion of the back member, and the rear surface of the lens is welded to the inclined portion. 3. The vehicle lamp according to claim 1, wherein an uneven portion which is engaged with each other is formed on each laminated surface of the back member and the lens.