JPS6320069Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a socket for a single-ended fluorescent lamp, such as a U-shaped fluorescent lamp, which has a cap in which electrodes at both ends of the fluorescent tube are integrated into one place.

Conventionally, as a socket for a single-ended fluorescent lamp such as a U-shaped fluorescent lamp, the one shown in Japanese Utility Model Application Publication No. 182573/1983 has been known, but it is difficult to attach a fluorescent lamp to such a socket. Since it is a rotary type, the socket becomes large, making it difficult to downsize the lighting equipment. On the other hand, as shown in FIGS. 1 to 4, an insulating body 4 has a built-in pin receiving metal fitting 3 that receives the base pin 2 of the U-shaped fluorescent lamp 1 and is electrically connected thereto. It is known that the lamp support springs 5 are individually attached with screws 6.
Although such a socket can solve the problem of being large as in the conventional example, the lamp support spring 5
U-shaped fluorescent lamp 1
There were large variations in the spring pressure used for holding the lamp, and the bottom surface of the lamp base sometimes touched the tip of the lamp support spring 5, making it difficult to mount the lamp, and there was a great possibility that management during the assembly process would be time-consuming.

The present invention was made in view of the above circumstances, and aims to simplify assembly and stabilize performance.

The present invention will now be explained based on an embodiment of the U-shaped fluorescent lamp socket shown in FIGS. 3 and 4. The insulating body 4 is a molded product and is formed into a substantially elongated cylinder shape, and has a U
It has a wall 7 on one end of the outer periphery that fits over the base of the U-shaped fluorescent lamp, and the wall 7 has approximately the same height as the base of the U-shaped fluorescent lamp. There is a U-shaped fluorescent lamp approximately in the center of the insulating body.
Four cap pin insertion holes 8 are formed that penetrate through the top and bottom corresponding to the cap pins of the book, and a pin receiving metal fitting 3 is formed inside.
The opening of the base pin insertion hole 8 on the mounting surface side is closed by an insulating bottom plate 9.
Mounting recesses 11 having mounting holes 10 are provided on both sides of the insulating body 4 in the long axis direction, extending one step downward from the surface in contact with the bottom surface of the U-shaped fluorescent lamp base. Lamp support spring mounting holes 12 into which lamp support springs 5 are fitted are formed on both side surfaces in the vertical direction. Near the opening of the lamp support spring mounting hole 12 on the mounting surface side, a lamp support spring locking portion 13 is provided protruding from the outer surface of the socket toward the center of the socket. The lamp support spring 5 is made of thin sheet metal and is formed into a substantially U-shape, and both ends are arcuate to serve as a guide when inserting the base of the U-shaped fluorescent lamp and to hold the U-shaped fluorescent lamp in the installed state. is being carried out. A locking pawl 14 connected at the upper end and cut outward is provided near the base of both U-shaped protrusions of the lamp support spring 5, and locks the lamp support spring in the lamp support spring removal pawl hole 12. The lamp support spring 5 is attached to the insulating body 4 by being hooked to the portion 13, and the bottom plate 9 is also fixed to the insulating body 4 by the lamp support spring 5.

In this socket, since the lamp support spring 5 is integrally formed, the dimensional accuracy of the tip spacing is good, the variation in spring pressure is reduced, the performance is stable, and the lamp support spring 5 also serves as an attachment to the insulating body 4 of the bottom plate. It is easy to assemble.

Note that when the locking pawl 14 of the lamp support spring 5 is cut and raised inward as in the embodiment shown in FIG. The pawl 14 protrudes more inward and the amount of engagement with the lamp support spring locking portion 13 increases, and the position of the locking pawl 14 is changed to a U-shaped protrusion as in the embodiment shown in FIGS. 3 and 4. It is better if it is located above the lamp support spring mounting hole 12 rather than near the base of the lamp support spring. In addition, as in the embodiment shown in FIG. 6, a cut-and-raise claw 15 is provided at a position where the U-shaped connecting piece of the lamp support spring 5 contacts the bottom plate 9, or a curved portion is provided to prevent the bottom plate from rattling. It is possible to secure performance such as insulation distance, and the mounting state of the lamp support spring 5 itself is stabilized.

Thus, according to the present invention, the cap pin insertion hole for inserting the cap pin of a single-ended fluorescent lamp is provided on the upper surface of the insulating body, and the opening communicating with the cap pin insertion hole is formed on the lower surface of the insulating body. A pin receiving fitting is attached to the insulating body facing the cap pin insertion hole, the opening is covered with an insulating bottom plate, and a lamp support spring is formed in a substantially U-shape and clamps the single-ended fluorescent lamp cap. Two U-shaped protrusions protrude from the upper peripheral side of the insulating body and are attached to the insulating body, and the U-shaped connecting piece of the lamp support spring is brought into contact with the bottom surface of the bottom plate to fix the bottom plate to the insulating body. are integrally formed, the dimensional accuracy of the spacing between the tips is good, and variations in spring pressure are reduced.If the lamp support spring is attached to the insulating body, the bottom plate can be attached to the insulating body, so the four pin holders are concentrated. There is no need to provide a fixing space for the bottom plate in the vicinity of the housing portion of the pin receiving metal fitting, so the socket can be made smaller and assembly is easier.

[Brief explanation of the drawing]

1 and 2 show a conventional example of the present invention, in which FIG. 1 is a perspective view of a single-ended fluorescent lamp installed, and FIG. 2 is a sectional view of the main part. 3 and 4 show an embodiment of the present invention, with FIG. 3 being a perspective view and FIG. 4 being a sectional view. FIGS. 5 and 6 are sectional views showing other different embodiments. 3...Pin receiver metal fitting, 4...Insulating body, 5...
... Lamp support spring, 7 ... Wall, 8 ... Base pin insertion hole, 9 ... Bottom plate, 10 ... Mounting hole, 11 ... Mounting recess, 12 ... Lamp support spring mounting hole, 13 ...
...Lamp support spring locking portion, 14...Latching claw, 15
...Cut-up nails.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A cap pin insertion hole for inserting a cap pin of a single-ended fluorescent lamp is provided on the top surface of an insulating body, and a pin receiver is housed inside the insulating body facing the cap pin insertion hole. In the socket for a single-ended fluorescent lamp in which a lamp support spring for holding a single-ended fluorescent lamp cap is protruded from the circumferential side of the upper surface of the insulating body, an opening that communicates with the cap pin insertion hole is formed on the lower surface of the insulating body, and Attach the pin receiver to the insulating body from the opening, cover the opening with an insulating bottom plate, attach the lamp support spring formed in a substantially U-shape to the insulating body, and attach the U-shaped connection piece of the lamp support spring to the bottom plate. A socket for a single-ended fluorescent lamp characterized by a bottom plate fixed to an insulating body by abutting against the bottom surface. (2) The socket for a single-ended fluorescent lamp according to claim 1, wherein the lamp support spring is attached to the outside of the insulating body. (3) A locking pawl is formed on both U-shaped projections of the lamp support spring, and a lamp support spring locking portion is provided in which the locking pawl is caught in the lamp support spring mounting hole provided in the insulating body. A single-ended fluorescent lamp according to claim 1 or 2 of the utility model registration claim, characterized in that the lamp is fitted into the lamp support spring attachment hole and the locking pawl is hooked to the lamp support spring locking portion. socket.