JP2553187Y2 - Light bulb socket - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light bulb socket, and more particularly to a light bulb socket suitable for a wedge-based light bulb socket.

[0002]

2. Description of the Related Art As a light bulb socket for a wedge-based light bulb, a socket shown in FIG. 4 is conventionally provided. In the figure, a socket body 1A is formed of a slender cylindrical body, and its tip 1Aa has a cross-sectional shape with both sides cut off, and a base 31 of a wedge-based bulb 3 is fitted therein. A contact 2 made of a metal material is provided inside the distal end portion 1Aa, and is electrically connected to a lead wire (not shown) provided on a base portion 31 of the electric bulb 3 fitted into the socket body 1A. This contact 2
Is connected to the other end of the socket body 1 </ b> A and is waterproofed by the bushing 4.

On the other hand, a circular flange 11A is provided at a part of the base 1Ab of the socket body 1A in order to attach the bulb socket to a lamp or the like.
A is supported. In addition, fitting projections 13A are provided at a plurality of circumferential positions (four here) on the outer peripheral surface of the socket main body, which is separated from the flange 11A by a small dimension. The flange 11A, the gasket 12A, and the fitting projection 13A form a bayonet-structured socket mounting portion. The socket body is inserted into the mounting hole 51A opened in the lamp body 5 from the front end side as shown in FIGS. The tool body is clamped between the flange and the gasket and the fitting projection by rotating the socket body by a small angle after inserting and inserting the fitting projection, thereby attaching the light bulb socket to the lamp. Has been taken.

[0004]

As shown in FIG. 6, such a conventional light bulb socket has a circular shape substantially equal to the outer diameter of the socket main body 1A and a circumference thereof for mounting to a lamp. Notches 51 for fitting projections to be inserted into four places
It is necessary to open a mounting hole 51A having a. Therefore, in order to prevent external moisture from entering into the lamp through the mounting hole 51A, the diameter of the waterproof gasket 12A must be adjusted to the maximum outer diameter of the mounting hole 51A, that is, the outer circumference of the socket body 1A. It is necessary to make the outer diameter dimension of the fitting projection 13A formed on the surface larger, and for that purpose, it is necessary to further increase the diameter dimension of the flange 11A supporting the gasket 12A. For this reason, the shape of the bulb socket determined by the diameter of the flange 11A becomes large, and there is a problem that it is difficult to miniaturize the bulb socket. Further, in a lamp in which a lamp reflecting surface is formed on the inner surface of the lamp body, there is a problem that the area of the reflecting surface is reduced by the large mounting hole, and the light distribution characteristics of the lamp are easily deteriorated. SUMMARY OF THE INVENTION An object of the present invention is to provide a light bulb socket in which a flange is reduced in size and the size is reduced.

[0005]

According to the present invention, there is provided a light bulb socket having a cylindrical body having a major axis and a minor axis whose cross section perpendicular to a cylinder axis direction has a major axis and a minor axis. With a shape corresponding to the long and short diameters of this socket body
And a said <br/> socket mounting portion provided on the other end portion of the socket body in order to fit attach the socket body into a mounting hole provided in the lamp or the like, the socket mounting portion, the socket A flange formed with a diameter larger than the major diameter of the main body, and the socket supported by the flange.
An annular gasket formed to have a diameter substantially equal to the major diameter of the main body, and formed by radially notching both sides on the longer diameter side at the other end position of the socket body adjacent to the flange in the cylinder axis direction, And a fitting recess fitted to the inner edge of the mounting hole.

[0006]

According to the present invention, the bulb can be mounted by clamping the lamp or the like between the inner edge of the fitting recess provided in the long diameter portion of the socket body and the flange, so that the diameter of the flange can be reduced. In addition, the area of the mounting hole can be reduced.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of one embodiment of the present invention, and FIG. In these figures,
The socket body 1 is formed in an elongated tubular body having a long diameter and a short diameter with a cross-sectional shape close to a rectangular shape in which both sides of a circle are cut, and a base portion 31 of the wedge-based bulb 3 is fitted into a tip 1a thereof. Can be done. In addition, two or more contacts 2 formed by processing a metal plate material are provided inside the distal end portion 1a of the socket body 1, and lead wires provided on the base portion 31 of the light bulb 3 fitted therein (FIG. (Not shown) to make an electrical connection. These contacts 2 are locked in the socket body 1 by locking the cut-and-raised pieces 21 to locking portions 14 formed on the inner surface of the socket body 1, and a cord 22 is connected to each contact 2,
The socket body 1 is led out from the base end 1b side.
4 is a base end 1b of the socket body through which this cord is inserted.
This is a bushing that is press-fitted for waterproofing.

On the other hand, a circular flange 11 is integrally formed at a part of the base 1b side of the socket body 1, and its diameter is slightly larger than the major diameter of the socket body 1. I have. An annular gasket 12 is supported on the flange 11.
2 has a diameter substantially equal to the major axis of the socket body 1. The cylindrical wall of the long side of the socket body 1 adjacent to the flange 11 in the axial direction is cut out by a predetermined dimension in the axial direction, and this portion is formed as a fitting recess 13. The flange 11, the gasket 12, and the fitting recess 13 constitute a socket mounting portion.

Therefore, according to this configuration, as shown in FIG. 3, the lamp body 5 has a mounting hole 51 having a shape corresponding to the cross-sectional shape of the socket body 1 and capable of inserting the socket body 1 from the front end 1a side. Open. And this mounting hole 51
The lamp body 1 is inserted 90 degrees in the direction around the axis at a position where the gasket 12 supported by the flange 11 abuts against the lamp body 5.
Rotate degrees. As a result, the fitting recess 13 of the socket body 1 is rotated to the short diameter portion of the mounting hole 51 as shown by a chain line in FIG. The lamp body 5 is sandwiched between the lamp body and the gasket 12, whereby the bulb socket is attached to the lamp. At this time, gasket 12
The clamping force is applied between the flange 11 and the inner edge of the fitting concave portion 13 by the elastic force of the conventional light bulb socket having the fitting projection. Gasket
G is approximately equal to the major dimension of the socket body 1
It is elastically deformed when it is in contact with the periphery of the mounting hole 51.
The outer periphery of the mounting hole 51 is enlarged in the outer diameter direction.
It will be located on the upper side and seals the mounting hole 51.

For this reason, even if the outer diameters of the gasket 12 for preventing moisture from entering from the mounting hole 51 and the flange 11 for supporting the gasket 12 are substantially equal to the major diameter of the socket body 1, Gasket 13 has mounting hole 5
A high waterproof effect can be obtained by closely contacting the lamp body 5 around the periphery 1, and a sufficient mounting strength can be obtained by supporting the gasket 12 from the base end side of the flange 11. Accordingly, the size of the light bulb socket determined by the diameter of the flange 11 and the like can be reduced, and at the same time, the area of the mounting hole 51 formed in the lamp body 5 can be reduced.
It is also possible to prevent the light distribution characteristics of the lamp having the reflection surface on the inner surface of the lamp body 5 from deteriorating.

[0011]

As described above, according to the present invention, the inner edge of the fitting recess provided in the long diameter portion of the socket body and the flange provided in the socket body are fitted to the inner edge of the mounting hole provided in the lamp or the like. Since it is configured to sandwich lamps etc.
The diameter of the flange is slightly smaller than the major dimension of the socket body
Even if the diameter of the gasket supported by this is substantially equal to the major dimension of the socket body, a sufficient waterproof effect and mounting strength can be obtained, and downsizing of the bulb socket can be realized. In addition, the mounting hole opened on the lamp side for mounting the socket can be formed into a shape having a long diameter and a short diameter similar to the cross-sectional shape of the socket body, and the opening area is reduced to reduce the area of the reflecting surface of the lamp. It is also possible to suppress the reduction and improve the light distribution characteristics of the lamp.

[Brief description of the drawings]

FIG. 1 is a perspective view of an embodiment of a light bulb socket of the present invention.

FIG. 2 is a cross-sectional view of the light bulb socket of FIG. 1 in an attached state.

FIG. 3 is a front view of a part of a lamp body provided with a mounting hole for the light bulb socket of FIG. 1;

FIG. 4 is a perspective view of an example of a conventional light bulb socket.

FIG. 5 is a cross-sectional view of the light bulb socket of FIG. 4 in an attached state.

6 is a front view of a part of a lamp body provided with a mounting hole for the light bulb socket of FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Socket body 2 Contact 3 Wedge base type bulb 11 Flange 12 Gasket 13 Fitting recess

Claims (1)

(57) [Scope of request for utility model registration] 1. A socket in which a cross section perpendicular to the cylinder axis direction has a major axis and a minor axis over substantially the entire length of the cylinder axis direction, and a base portion of a wedge-based bulb is fitted into one end of the cylinder body. A main body, a contact provided inside the socket main body and electrically connected to a lead wire provided on a base portion of the light bulb, and a long and short diameter of the socket main body .
Fit the socket into the mounting hole provided in the lamp etc.
The other end portion of the socket body in order to fit attach the body
And a socket mounting portion provided on this socket mounting portion, a flange formed on the larger diameter than the diameter dimension of the socket body, said source being supported by the flange
An annular gasket formed to have a diameter substantially equal to the major axis of the socket body, and radially notched both sides of the long side of the socket body at the other end position of the socket body adjacent to the flange in the cylinder axis direction. And a fitting recess fitted to an inner edge of the mounting hole.