JPS6338548Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to the structure of a socket for holding a light bulb having a screw-in base.

[Background technology]

Conventionally, as shown in FIGS. 1 and 2, a highly heat-resistant socket for holding a small, high-capacity lamp such as a halogen bulb has been designed to hold a lamp between an upper part 1 of a porcelain body and a lower part 2 of the body. A receiver 3, which is a conductive member, and a center contact piece 4 are clamped and fixed, and a fastening fitting 5 and a base fitting 6 are joined to each other so as to sandwich the body upper part 1 and the body lower part 2, so as to be integrated. something is well known. The upper part 1 of the body is approximately circular and tubular, and has a hollow hole 7 in the center, an annular protrusion 8 around the hollow hole 7 on the upper surface, and a protrusion 9 protruding downward from the lower surface on the lower side surface. There are two in related positions. The lower part of the body 2 has a hollow hole 1 with a bottom.
0, has a protrusion 12 having a groove 11 at a symmetrical position on the side surface, and has an annular recess 13 on the top surface. The receiver 3 has a substantially hollow cylindrical shape with an outer flange 14 and a thread provided on the wall surface, and a substantially rectangular terminal piece 15 is provided in a part of the outer flange to connect a lead wire 16. The center contact piece 4 is an elongated piece with a bent middle, and a terminal piece 17 is integrally provided to connect the lead wire 1.
The fastening fitting 5 to which 8 is connected includes a ring body 19 that fits onto the annular convex portion 8 of the upper body 1, and a connecting body 2 that is bent vertically downward from symmetrical sides of the ring body 19.
It is closer to 0. The base metal fitting 6 includes a rectangular mounting plate 23 having mounting holes 22 on both symmetrical sides of a disc-shaped bottom plate part 21, and the bottom plate part 21 and the mounting plate 23 are connected to each other.
It has a caulking hole 24 for caulking the connecting body 20 of the fastening metal fitting 5 at the joint portion with the clamping member 5.

Then, the lead wires 16 and 18 connected to the respective terminal pieces 15 and 17 of the receiver 3 and the center contact piece 4 are inserted into the grooves 11 and 11 in the lower body part 2, and the receiver
The outer flange 14 of the body is fitted into the annular recess 13, and the protrusion 9 of the upper body 1 is fitted into the groove 11 of the lower body 2, so that the body is held between the upper body 1 and the lower body 2. The ring body 19 of the fastening fitting 5 is fitted onto the annular convex portion 8 of the upper body 1, and the upper body 1
The connecting body 20 extending downward along the wall surface of the lower body part 2 is assembled by caulking into the caulking hole 24 of the base metal fitting 6 which is brought into contact with the bottom surface of the lower body part 2.

However, such a screw-in socket requires two metal fittings, the tightening fitting 5 and the base fitting 6, for assembly, and due to its shape, there is a lot of loss of the tightening fitting 5, making it difficult to position the parts during assembly. This was difficult to do, resulting in poor workability and increased costs.

[Purpose of invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a socket for holding a light bulb having a screw-in type cap, which can be assembled easily and at a low cost.

[Disclosure of invention]

The present invention will be explained based on the embodiment shown in FIGS. 3 and 4. The lower body 2, the receiver 3, and the center contact piece 4 are formed almost the same as the conventional example, and the receiver 3
The center contact piece 4 is held between the lower body 2 and the upper body 1 in substantially the same manner as in the conventional example. Unlike the conventional example, the upper body part 1 has a flat upper surface, and the convex part 9 is connected to the protruding part 1 of the lower body part 2.
The trapezoidal groove 25 is formed on the upper surface. The base metal fitting 6 also serves as a fastening metal fitting, and has a rectangular mounting plate 23 having a mounting hole 22 arranged in a row at a substantially symmetrical position of the substantially disc-shaped bottom plate portion 21. Two fixed claws 2 are provided in the direction orthogonal to the directions of 23 and 23, respectively.
6 and 26 extend upward facing each other,
The two fixing claws 26, 26 are mutually U-shaped protrusions, and are continuous from the bottom plate portion 21 in the form of horizontal U-shaped pieces. The distance between the two opposing fixing claws 26 is the same as the protrusion 9 on the upper body 1 and the protrusion 12 on the lower body 2.
Its length is such that it projects slightly upwards from the protrusion 9 of the upper body 1 assembled on the lower body 2.

When assembling, the protrusion 12 of the lower body 2 is fitted into the fixing claw 26 of the base metal fitting 6 to position the lower body 2, and the receiver 3 and the center contact piece 4 are assembled into the lower body 2. At the same time, the protrusion 9 of the upper body 1 is also fitted between the two fixing claws 26, 26, and the fixing claw 26 is bent into the trapezoidal groove 25 on the upper surface of the protrusion 9 of the upper body 1, and the whole is integrated. Assemble.

[Effect of idea]

With this screw-in socket, it is easy to absorb variations in the dimensions of the upper part of the body or the lower part of the body, and the fixing claws can be used as a guide for assembly, making it easy to assemble.Since it is fixed with four fixing claws, the mutual bonding force is large. In addition, it can be assembled using only the base metal fittings, so the number of parts is small, there is less loss of base metal fittings, and overall costs can be kept down.

[Brief explanation of drawings]

1 and 2 show a conventional example of the present invention, with FIG. 1 being a perspective view and FIG. 2 being an exploded perspective view. 3 and 4 show an embodiment of the present invention, with FIG. 3 being a perspective view and FIG. 4 being an exploded perspective view. 1...upper body, 2...lower body, 3...receiver,
4... Center contact piece, 6... Base metal fitting, 9... Convex part, 12
...Protrusion part, 21...Bottom plate part, 22...Mounting hole, 23...
Mounting plate, 25...trapezoidal groove, 26...fixing claw.

Claims (1)

[Scope of utility model registration request] A receiver and a center contact piece are sandwiched between the upper part of the porcelain body and the lower part of the body, and mounting plates are provided symmetrically to each other on the sides of the base metal fitting that is in contact with the bottom surface of the lower part of the body. Two fixing claws facing each other are provided upwardly projecting along the direction of the two mounting plates at a position substantially perpendicular to the plate, and the upper part of the body fitted between the two fixing claws is provided. A screw-in socket characterized by a fixed claw fixed to the convex part by caulking.