JP2004185815A - Lamp bulb socket - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce cost by saving a metallic spring material of connecting ends while providing a locking claw for engaging with an inserting portion of a lamp bulb at a receiving portion made of synthetic resin. <P>SOLUTION: In a lamp bulb socket, a receiving portion 12 corresponding to an inserting portion 1b of the lamp bulb is formed at a front section of a socket body 11 made of synthetic resin, and connecting ends 13 to electrically connect with a contact 1c of the inserting portion 1b of the lamp bulb and a locking end 14 to lock the inserting portion 1b are provided in the receiving portion 12. A locking claw 22 to prevent fall-off and lock against a protrusion line 1e of the inserting portion 1b is protruded on an inner surface of the receiving portion 12 of the socket body 11, and the locking claw 22 shares a part of a locking function borne only by the locking end 14 conventionally. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a light bulb socket used for a signal light bulb of an automobile, for example.
[0002]
[Prior art]
A wedge-shaped base bulb or a wedge-based bulb is used in a bulb unit of an automobile, and the wedge-based bulb is held in a bulb socket. I have.
[0003]
FIG. 3 is a perspective view of a wedge-based bulb that is currently widely used, and FIG. 4 is a side view. This wedge-based bulb is provided with a substantially cylindrical bulb portion 1a containing a filament and a substantially flat prismatic insertion portion 1b which can be press-fit into a bulb socket described later, and the bulb portion 1a and the insertion portion 1b are made of glass. It is molded integrally.
[0004]
The insertion portion 1b is formed so that the front and back surfaces of the insertion portion 1b can be arbitrarily press-fitted into the light bulb socket. A contact 1c, an axially extending ridge 1d used for bleeding air inside the bulb portion 1a, and a front and back surface which is oriented in a direction perpendicular to the axis and which is hooked to a hooking end in the bulb socket. A pair of protrusions 1e, a protrusion 1f for restricting the lateral movement of the contact 1c, and a protrusion 1g for restricting the insertion amount into the bulb socket are formed.
[0005]
FIG. 5 is a plan view of a conventional light bulb socket, and FIG. 6 is an enlarged vertical sectional view of a state in which a wedge-based light bulb is inserted. In this light bulb socket, a receiving portion 3 is formed at the front of a socket body 2 made of a synthetic resin, so as to fit into the insertion portion 1b of the wedge-based light bulb. In the receiving portion 3, a pair of connection members made of a metal spring material is provided. An end 4 and a latching end 5 made of a metal spring material integral with the connection end 4 are provided. A movable electric contact 6 electrically connected to the contact 1c of the inserted insertion portion 1b with its free end facing downward is provided at the connection end 4, and the protrusion 5 of the insertion portion 1b is provided at the hooking end 5. A locking piece 7 for locking the ridge 1e to prevent the wedge base bulb from coming off is provided with its free end facing upward. The connection end 4 and the hook end 5 are connected to a lead wire 9 at a crimping portion 8.
[0006]
[Problems to be solved by the invention]
In order to sufficiently prevent the wedge-based bulb from coming out during use, a strong elastic supporting force is required for the hook end 5, so that a relatively thick and expensive metal spring material having a high spring constant must be used. The price of the hanging ends is one factor that drives up the cost of bulb sockets.
[0007]
SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and to provide a locking function for retaining a light bulb insertion portion to a socket body made of a synthetic resin, thereby saving a metal spring material and reducing the cost. To provide sockets.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, a light bulb socket according to the present invention has a receiving part corresponding to an insertion part of a light bulb having a wedge-shaped base formed in a socket body made of synthetic resin, and provided in the insertion part of the light bulb in the receiving part. And a metal connection end electrically connected to the contact point and a metal hooking end for hooking on a ridge provided on the insertion portion, wherein the insertion portion is inserted into an inner surface of the receiving portion. A latching claw that latches and latches on the ridge of the portion is integrally provided from the socket body.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
The present invention will be described in detail based on the embodiment shown in FIGS.
FIG. 1 is a plan view of a light bulb socket according to the present invention, and FIG. 2 is an enlarged vertical sectional view showing a state in which a wedge base bulb is mounted. The light bulb socket has a tubular shape suitable for mounting a wedge base bulb. A socket body 11 made of a synthetic resin material is mainly used, and a receiving section 12 corresponding to the insertion section 1b of the electric bulb is formed at a front portion of the socket body 11. In the receiving portion 12, a connection end 13 which is connected to and engages with the contact 1c of the light bulb, and a hooking end 14 which is hooked from both sides of the insertion portion 1b to the ridge 1e of the insertion portion 1b are provided. The latching end 14 is integrally formed by pressing and bending a metal spring material, and is connected to a lead wire 16 via a crimping portion 15 at a rear end.
[0010]
The connection end 13 is provided with an electric contact piece 17 having a free end facing downward for making electrical contact with each of the pair of contacts 1c of the insertion portion 1b of the bulb. The hooking end 14 is provided with a hooking piece 18 that mechanically hooks on the ridge 1e of the insertion portion 1b with its free end facing upward. In FIG. 2, the illustration of the hooking piece 18 is omitted for convenience of the drawing, but it is almost the same as the hooking piece 7 of FIG. 6.
[0011]
Further, a rubber plug 19 is fitted to the rear end of the socket body 11, and a through hole 20 is formed in the rubber plug 19 to insert the lead 16 connected to the rear of the connection end 13. 16 is drawn out.
[0012]
Inside the receiving portion 12, a terminal support groove 20 for supporting each electric contact piece 17, a not-shown abutting portion for abutting each projection 1 g of the insertion portion 1 b and the like are provided integrally with the socket body 11. . A pair of hooking claws 22 project from the socket body 11 inward from both sides of the inner surface of the receiving portion 12 and adjacent to the hooking piece 18 of the hooking end 14. The stop claw 22 is adapted to be locked from a pair of protrusions 1e of the insertion portion 1b from both sides.
[0013]
In this light bulb socket, the hooking claw 22 integral with the socket body 11 gets over the ridges 1e on both sides of the insertion section 1b of the bulb due to elastic deformation of the socket body 11 itself, and hooks the insertion section 1b. The wedge-based light bulb is firmly held by the mechanically strong locking, in combination with the locking of the locking end 14 by the locking piece 18. Therefore, since the retaining claw 22 is promoted to prevent the insertion portion 1b from coming off, the thickness and the width of the retaining end 14 can be reduced correspondingly.
[0014]
Further, a mounting flange 23 is integrally formed on the outer periphery of the intermediate portion of the socket main body 11, and the socket main body 11 is watertightly mounted on the reflecting mirror 25 via the packing 24 by the flange 23.
[0015]
The number of the contacts 1c, the connection ends 13, the latching ends 14, and the latching claws 22 of the light bulb are not limited to one pair as in the embodiment, but may be increased as necessary.
[0016]
【The invention's effect】
As described above, according to the light bulb socket according to the present invention, the hooks are provided on the inner surface of the receiving portion of the socket body so that the hooks for retaining and hooking the protrusions of the light bulb insertion portion are provided. The locking function of the conventional metal spring material for preventing the falling off can also be borne by the socket body made of synthetic resin, so that the material of the metal spring material can be saved and the cost can be reduced.
[Brief description of the drawings]
FIG. 1 is a plan view of a light bulb socket according to an embodiment.
FIG. 2 is an enlarged vertical sectional view showing a state in which a wedge-based bulb is inserted.
FIG. 3 is a perspective view of a wedge-based light bulb.
FIG. 4 is a side view.
FIG. 5 is a plan view of a conventional light bulb socket.
FIG. 6 is an enlarged vertical sectional view showing a state in which a wedge-based bulb of a conventional example is inserted.
[Explanation of symbols]
1a Valve portion 1b Insertion portion 1c Contact 1e Ridge 11 Socket body 12 Receiving portion 13 Connection end 14 Hook end 17 Electrical contact piece 18 Hook piece 22 Hook claw

Claims (3)

A receiving portion corresponding to an insertion portion of a light bulb having a wedge-shaped base is formed in a synthetic resin socket body, and a metal connection end electrically connected to a contact provided in the insertion portion of the light bulb in the receiving portion. In a light bulb socket in which a metal hooking end for hooking on a ridge provided on an insertion portion is arranged, a hooking claw is provided on an inner surface of the receiving portion to hold the hook on the ridge of the insertion portion. A light bulb socket characterized by being integrally protruded from a socket body. The light bulb socket according to claim 1, wherein the hooking claw is disposed adjacent to the hooking end, and hooks on a common ridge of the insertion portion. 2. The light bulb socket according to claim 1, wherein the connection end and the hook are formed by an integral metal spring plate.

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