JP2575956Y2 - Lighting socket mounting structure - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for mounting a socket for a light source bulb of a lamp to a housing of the lamp via a socket holder. However, in the present invention, the lamp is not limited to an independent fixture dedicated to lighting, but includes a fixture that also serves as lighting.

[0002]

2. Description of the Related Art FIG. 4A is a sectional view showing an example of a vehicular rearview mirror provided with a spot lamp. A mirror 2 is mounted on a mirror housing 1, and a light source bulb 3 and a reflector 5 are arranged behind the mirror 2. A light projecting window 1a is provided below the lamp housing 1, and a lens 4 is fitted therein. 1b is a heat radiation hole. A printed circuit board 6 is fixed in the mirror housing 1, and a socket 7 of a light source bulb is fitted to the printed circuit board 6 to conduct electricity. The socket 7 mounts the light source bulb 3 and a socket holder 8.
Press-fit.

In order to replace the light source bulb 3, an appropriate tool is engaged with a tool engaging groove (a so-called coin groove) 8 a and the socket holder 8 is removed from the mirror housing 1. Since the socket 7 is removed while being pressed into the socket holder 8, the socket holder 8 is screwed to the mirror housing 1 after replacing the light source bulb.

[0004]

Removing the socket holder 8 in order to replace the light source bulb 3 in the conventional example shown in FIG. 4 [devised SUMMARY is] (A) from the mirror housing 1, detached in the state shown in FIG. (B) It is. That is, the cylindrical surface portion 7 a of the socket 7 to which the light source bulb 3 is mounted is pressed into the cylindrical portion 8 b of the socket holder 8. However, the temperature of this portion rises due to the heat generated by the light source bulb 3 during use (when lit). For this reason, the press-fitting portion made of synthetic resin undergoes plastic deformation (creep), and the tightening margin of the press-fitting is reduced. Therefore, there is a possibility that the socket 7 may fall off from the socket holder 8 and be lost in the state of FIG. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a socket mounting structure that does not cause the socket to fall out of the socket holder when the light source bulb is replaced.

[0005]

The socket mounting structure of the present invention configured to achieve the above object will be briefly described with reference to FIG. 1 corresponding to the embodiment. That is, the socket holder 10 is formed with a concave cylindrical surface 10c. On the other hand, a rubber piece 9b is fixed to the socket 9 as an elastic body.
A convex cylindrical surface 9c having a larger diameter than the concave cylindrical surface is formed in b . When the rubber piece 9 is press-fitted into the concave cylindrical surface 10c, the rubber piece is compressed, the convex cylindrical surface 9c and the concave cylindrical surface 10c are pressed against each other, and the frictional force acts to prevent the rubber column from coming off. The elastic body is not limited to a rubber piece, but may be a sponge or a felt.

[0006]

According to the above construction, the convex cylindrical surface 9c and the concave cylindrical surface 10c are pressed against each other by the elastic restoring force of the elastic body, so that there is no danger that the socket will fall off the socket holder. This effect is achieved by the socket holder 8 of the conventional example (FIG. 4).
In the present invention, an elastic body is used, so that the elastic member is used, so that the elastic deformation of the cylindrical portion 8b made of synthetic resin having relatively high rigidity is not used. Obtained by being able to. As can be easily understood from the above-described working principle, the cylindrical concave and convex surfaces in the present invention do not need to be strictly three-dimensional geometrically cylindrical surfaces, and include shapes similar to cylindrical surfaces. It is intention. In short, it is sufficient if the concave curved surface and the convex curved surface can make surface contact with each other and can be inserted and removed.

[0007]

DETAILED DESCRIPTION FIG. 2 shows an embodiment of the present invention, it is a cross-sectional view corresponding to FIG. 4 (A) in the conventional example. FIG. 1 is an exploded perspective view of the main part. This embodiment is an improvement obtained by applying the present invention to the above-described conventional example, and the components denoted by the same reference numerals as those in FIG. 4 are the same or similar components as those in the conventional example. As shown in FIG. 1, the socket holder 10 of the present embodiment has an elastic arm 10a on an outer peripheral portion, and an engagement protrusion 10b is formed at a distal end thereof. The socket holder 10 of the present embodiment is formed by integrally molding the elastic arm 10a and the engaging projection 10b with an elastic synthetic resin material. When the socket holder 10 is inserted into the socket mounting hole of the mirror housing 1 and turned in a predetermined direction (for example, clockwise as viewed from the operator), the engagement protrusion 10b is engaged with the engagement recess 1c as shown in FIG. And fixedly attached thereto, and removed by turning in the opposite direction (for example, counterclockwise). 10d is a coin groove for mounting operation. As shown in FIG. 1, the socket holder 10 has a concave cylindrical surface 10c. On the other hand, the light source bulb 3 is mounted on the socket 9 and a groove-shaped recess 9a is formed. A rubber piece 9b as an elastic body is fitted in the groove-shaped recess 9a . In this embodiment , a rubber piece 9b is provided in the groove-shaped recess 9a.
Mating, with an adhesive, it was fixed. A convex cylindrical surface 9c having a diameter larger than that of the concave cylindrical surface 10c is formed on the rubber piece 9b. When the rubber piece 9b is pressed into the concave cylindrical surface 10c as shown by the arrow a, the rubber piece 9b is elastically deformed and compressed, and the elastic restoring force causes the convex cylindrical surface 9c to be pressed against the concave cylindrical surface 10c, thereby causing friction. Because the force acts, it does not escape. (See FIG. 1) Elastic rubber piece 9b
When the convex cylindrical surface 9c is pressed into the concave cylindrical surface 10c,
Bulges toward the inner wall surface of the groove-shaped recess 9a due to the properties of the sexual body
Try to transform it to However, the above swelling is
It is blocked by the inner wall surface of the groove-shaped recess 9a. For this reason,
Swelling in the direction toward the inner wall surface of the groove-shaped recess 9a was prevented.
The rubber piece 9b resists strongly against the compression of the convex cylindrical surface 9c.
The surface pressure between the convex cylindrical surface 9c and the concave cylindrical surface 10c increases.
As a result, the escape prevention effect of the frictional force is more reliable.
become. Therefore, when the socket holder 10 is removed from the mirror housing 1 to replace the light source bulb 3, there is no possibility that the socket 9 will fall off the socket holder.

FIG. 3A, FIG. 3B and FIG.
(D) shows an embodiment different from the above. FIG.
10e shown in (B) is a hole provided in the concave cylindrical surface 10c. When such a hole 10c is provided, when the socket is inserted, the elastic body (rubber piece in this example) 9b swells into the hole 10c with an elastic restoring force as shown in FIG. Function becomes more certain.

In the embodiment shown in FIG. 3D, a female thread-shaped unevenness 10f is provided instead of the hole. With this configuration, as shown in FIG.
b is elastically deformed into a male screw shape and screwed together, and the retaining function is improved. When the socket 9 is pulled out from the socket holder 10 to replace the light source bulb 3 in the embodiment of FIG. 3, a trace of unevenness remains on the rubber piece 9b. A),
Even if it does not restore to the same state as (C), the above-mentioned unevenness fulfills the function of retaining.

[0010]

As described above, when the present invention is applied, when the socket holder is removed from the housing to replace the light source bulb, there is no danger that the socket will fall off the socket holder and be lost. This provides an excellent practical effect that the light source bulb can be quickly and easily replaced.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of an essential part of a lighting socket mounting structure according to an embodiment of the present invention.

FIG. 2 is a sectional view of the embodiment.

FIGS. 3A and 3B are explanatory diagrams of embodiments different from the above.

FIG. 4A is a sectional view showing a conventional socket mounting structure, and FIG. 4B is an explanatory view showing a state where a socket holder is removed.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Mirror housing, 1a ... Light emission window, 1b ... Heat dissipation hole,
1c: engagement concave portion, 2: mirror, 3: light source bulb, 4: lens, 5: reflector, 6: printed circuit board, 7: socket, 8: socket holder, 8b: cylindrical portion, 9: socket, 9a: groove 9b: rubber piece, 9c: convex cylindrical surface,
10: socket holder, 10a: elastic arm, 10b:
Engagement projections, 10c: concave cylindrical surface, 10e: hole, 10f: female screw-like irregularities.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) F21Q 1/00 F21V 19/00 330 H01R 33/46 H01R 33/94 H01R 33/97

Claims (1)

(57) [Scope of request for utility model registration] 1. A structure in which a socket (9) provided with a light source bulb (3) of a lamp is mounted on a socket holder (10) mounted on a housing of the lamp, wherein the socket holder (10) has a cylindrical surface. Concave surface (1
0c) is formed and a groove is formed in the socket (9).
An elastic body (9b) is fixed by fitting into the groove-shaped recess.
And the elastic body (9b) has a cylindrical convex curved surface (9 ) having a diameter larger than that of the cylindrical concave curved surface (10c).
c) is formed, and a circle of the elastic body is formed in the cylindrical concave surface (10c).
A mounting structure for a lighting socket, wherein a columnar convex curved surface (9c) is press-fitted .