JP2003095017A - Fitting structure of lens of vehicle lamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the fitting structure of the lens of a vehicle lamp, with which a projected strip is hard to break from its base end even if both lens and the projected strip are made of hard resin. SOLUTION: The projected strip 10 is bent at the base end to form a crank- shape extending from the base end, and two bent parts 11, 12 are formed on the projected strip 10. As a result, a bent stress acting on the projected strip 10 is dispersed to make it unbreakable at the base end.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lens mounting structure for a vehicle lamp.

[0002]

2. Description of the Related Art In automobiles, there are step lamps mounted on door trims, room lamps mounted on roof trims, and the like. This type of lamp mounts a lens in an opening formed in the trim and holds a bulb inside the lens. The valve may be integrally assembled on the lens side or may be incorporated in a housing installed on the opening side of the trim. In any case, on the back surface of the lens, a projection piece with the base end as the base is formed integrally with the lens, and the claw part formed at the tip end in an outward state is engaged with the edge of the opening. Thus, the lens is attached to the aperture (as a similar technique, Japanese Patent Laid-Open No.
00-272411).

[0003]

However, in such a conventional technique, when the claw portion of the projecting piece crosses over the edge portion of the opening and engages with the claw portion of the projecting piece, the projecting piece moves from the base end which is the base. Although the lens is bent, since the lens is generally made of a hard resin such as polycarbonate, the integrally formed protrusion is also made of a hard resin, and the protrusion itself is not easily elastically deformed. Therefore, if an unreasonable work is performed when engaging the claw portion with the edge of the opening, the bending stress generated in the projecting piece concentrates on the base end that is the base of the projecting piece, and the projecting piece breaks from the base end. There is a risk.

The present invention has been made by paying attention to such a conventional technique. Even if the lens and the projecting piece are made of hard resin, the projecting piece is difficult to break from the base end. Is provided.

[0005]

According to a first aspect of the present invention, a claw portion of a protrusion integrally formed from a lens of a lamp is engaged with an edge portion of an opening formed in a vehicle body to thereby form the lens. Is a lens mounting structure for a vehicle lamp that is mounted to an opening, wherein the projecting piece is bent in a crank shape from a base end.

According to the first aspect of the invention, since the projecting piece is bent in a crank shape from the base end, the projecting piece has bent portions at two places, the base end and the middle part. Become. Therefore, the bending stress generated in the projecting piece is distributed to the two bent portions, and the stress concentration on only the base end is avoided. Therefore, even if the lens and the projecting piece are made of hard resin, they cannot be bent.

According to a second aspect of the present invention, the claw portion has a triangular cross-section formed at the tip of the projecting piece in an outwardly facing state, and engages with an introduction slope for introducing the edge of the opening. It has a slope.

According to the second aspect of the present invention, the claw portion has a triangular cross section, and an introduction slope for introducing the edge portion of the opening,
Since it has an engaging slope to be engaged, the engagement with the edge of the opening is smooth and the engaging work is easy.

According to a third aspect of the present invention, the corner portion of the flange holding the valve is positioned adjacent to the claw portion of the projecting piece, and the corner portion has a surface for avoiding interference with the edge portion of the opening. A catch is formed.

According to the third aspect of the invention, even if there is a corner portion of the flange at a position adjacent to the claw portion of the projecting piece, a chamfered portion is formed at the corner portion, so that the edge of the opening is formed. It is possible to avoid interference between the claw portion engaged with the portion and the flange.

According to a fourth aspect of the present invention, a claw portion of a projecting piece integrally formed with a lens of the lamp is engaged with an edge portion of the opening formed in a part of the vehicle body so that the lens is formed into the opening. In the lens mounting structure for a vehicle lamp to be mounted on the opposite side, a hollow cross-section is formed on the projecting piece, and a claw is formed on the hollow cross-section.

According to the invention as set forth in claim 4, since the projecting piece is formed with the hollow cross-section and the claw is formed therein, even if the projecting piece is made of a hard resin, the claw is the edge of the opening. When engaged with, the hollow section deforms so as to be crushed, and the claw itself bends inward. Therefore, the bending stress generated in the projecting piece is reduced as much as the claw portion bends inward, and the projecting piece can be prevented from being broken from the base end.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings.

1 to 5 are views showing a first embodiment of the present invention. In this embodiment, the "body" inside the door
The step lamp 2 is a "lamp" attached to the trim 1. This step lamp 2
Is composed of a lens 3 and a valve 4 held by the lens 3.

FIG. 1 is a view of the step lamp 2 as viewed from the back side. The lens 3 is made of polycarbonate, which is a hard resin, and is provided with a lens body 5 having a V-shaped cross section, and a pair of flanges 6 are formed on the back surface of the lens body 5 so as to face each other. One end of the flange 6 is connected by a rib 7, and the other end of the flange 6 is provided with a valve holder 8. The valve 4 is held in the valve holding portion 8 via a metal fitting (not shown). A plurality of reinforcing ribs 9 are also formed on the outer side of the flange 6.

The rib 7 on the one end side of the lens 3 has
A projecting piece 10 having a shape obtained by cutting and raising a part thereof is integrally formed. That is, the projecting piece 10 is bent in a crank shape from the base end to the outside, and has two bent portions 11 and 12 at the base end and the middle portion. Bend part 11 on the base end side
Is bent at a substantially right angle, but the bent portion 12 in the middle is bent in a curved state. Further, an outwardly facing claw portion 13 is formed at the tip of the projecting piece 10. This claw 13
Has a triangular cross section having an introduction slope 13a and an engagement slope 13b. A corner portion of the flange 6 is located at a position adjacent to the claw portion 13, and a chamfered portion 14 having substantially the same angle as the introduction surface 13a is formed at the corner portion.

The trim 1 has a recess 1 for housing the lens 3.
5 is formed, and an opening 16 is formed in the recess 15. When attaching the lens 3 to the opening 16, first, as shown in FIG. 4, the valve holding portion 8 is engaged with the other edge portion of the opening 16 and the claw portion 13 of the projecting piece 10 is used as a fulcrum.
To one edge. When engaging, the claw portion 13 slides over the introduction slope 13a with respect to the edge portion,
The engagement slope 13b is brought into the engagement state while being pressed against the edge. Since the claw portion 13 has a triangular cross section having the introduction slope 13a and the engagement slope 13b, the engagement is smooth.

Further, when the claw portion 13 of the projecting piece 10 crosses over the edge of the opening 16, the projecting piece 10 is pushed and bent outward, but the projecting piece 10 is bent in a crank shape from the base end,
The projecting piece 10 has two bent portions 11, a base end and an intermediate portion.
Since 12 exists, the bending stress generated in the protruding piece 10 is dispersed in the two bent portions 11 and 12, and is not concentrated only at the base end. Therefore, even if the lens 3 and the projecting piece 10 are formed of a hard resin, the projecting piece 10 will not be broken from the base end when the projecting piece 10 is engaged.

Further, since the chamfered portion 14 is formed at the corner of the flange 6 adjacent to the pawl portion 13 in the engaged state, the pawl portion 13 and the flange 6 do not interfere with each other. By engaging the claw portion 13 with the edge portion of the opening 16, the upper and lower end portions of the lens 3 come into contact with the upper and lower peripheral portions of the opening 16 from the front side (see FIG. 5), and the mounting state of the lens 3 is fixed. Stabilize.

6 and 7 are views showing a second embodiment of the present invention. In this embodiment, the hollow section 18 is formed at the tip of the projecting piece 17, and the claw 19 is formed outside the hollow section 18. Therefore, even when the protruding piece 17 is formed of hard resin, when the claw portion 19 engages with the edge portion of the opening 16,
The hollow cross section 18 is deformed so as to be crushed, and the claw portion 19 itself bends inward. Therefore, the bending stress generated in the projecting piece 17 is reduced by the amount that the claw portion 19 bends inward, and the projecting piece 1
It is possible to prevent 7 from breaking from the base end. Other configurations and operational effects are similar to those of the previous embodiment.

In the above embodiment, the step lamp attached to the door trim is taken as an example. However, the present invention is not limited to this, and the lens is integrally formed at the edge of the opening formed in a part of the vehicle body. Any lamp may be used as long as it engages the claws of the projecting pieces.

[0022]

According to the present invention, since the projecting piece is bent in a crank shape from the base end, the projecting piece has bent portions at two places, the base end and the middle part. Therefore, the bending stress generated in the projecting piece is dispersed in the two bent portions, and concentration on only the base end is avoided. Therefore, even if the lens and the projecting piece are made of hard resin, they cannot be bent.

[Brief description of drawings]

FIG. 1 is a perspective view showing a lamp according to a first embodiment of the present invention.

FIG. 2 is a sectional view showing a state in which the lamp of FIG. 1 is attached to an opening.

FIG. 3 is an enlarged cross-sectional view showing the protrusion of FIG.

FIG. 4 is a cross-sectional view showing a state in which the lamp of FIG. 2 is being attached to an opening.

FIG. 5 is a cross-sectional view taken along the line SA-SA shown in FIG.

FIG. 6 is a perspective view showing a protrusion according to a second embodiment of the present invention.

FIG. 7 is a cross-sectional view showing a state in which the claw portion of FIG. 6 is engaged with the opening.

[Explanation of symbols]

1 trim (car body) 2 step lamp (lamp) 3 lenses 4 valves 6 flange 10,17 Projection piece 11, 12 Bent section 13, 19 Claw 13a Introduction slope 13b engagement slope 14 Chamfer 16 openings 18 Hollow section

Claims (4)

[Claims] 1. A vehicle lamp lens mounting structure for mounting a lens of a lamp to an opening by engaging a claw portion of a protrusion integrally formed from the lens of the lamp with an edge portion of the opening formed in the vehicle body. The lens mounting structure for a vehicle lamp, wherein the protrusion is bent in a crank shape from a base end. 2. The lens mounting structure for a vehicle lamp according to claim 1, wherein the claw portion has a triangular cross-section formed at the tip of the projecting piece in an outwardly facing state, and the edge portion of the opening is formed. A lens mounting structure for a vehicle lamp, comprising: an introduction slope to be introduced and an engagement slope to be engaged. 3. The lens mounting structure for a vehicle lamp according to claim 2, wherein a corner portion of a flange that holds the bulb is located adjacent to a claw portion of the projecting piece. A lens mounting structure for a vehicle lamp, characterized in that a chamfered portion for avoiding interference with the edge portion of the opening is formed in the. 4. A lens mounting structure for a vehicle lamp, wherein a lens of a lamp is mounted to an opening by engaging a claw portion of a protrusion integrally formed from the lens of the lamp with an edge portion of the opening formed in the vehicle body. A lens mounting structure for a vehicle lamp, wherein a hollow cross-section is formed on the projecting piece, and a claw is formed on the hollow cross-section.