JPS5848784Y2 - lamp socket - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a lamp socket used for halogen light bulbs and the like.

A conventional lamp socket of this type is shown in FIG.

That is, in this lamp socket, one of the pair of contacts 2 and 3 that clamps the lamp pin 1 from the lateral direction is held in the casing 4 so as to be slidable in the clamping direction, and the adjusting screw 5 attached to the casing 4 is twisted. This was to press the slidable contact 2.

6 is a guide shaft, 7 and 8 are ceramic holders that hold the contacts 2 and 3, respectively, 9 and 10 are rubber sheets, and 11 is a presser plate.

However, this lamp socket had the following drawbacks.

That is, (1) Since the contactor 2 is tightened with the adjustment screw 5, it takes time and effort to tighten it.

■ When tightening the contactor 2 with the adjustment screw 5, the tightening force varies from person to person and is unreliable.

(2) Rubber seams (9.10) are used as cushioning materials for the holders 7 and 8, which are porcelain parts, but when the lamp is lit, the socket becomes hot (about 200°C), causing deterioration of the elasticity of the rubber, resulting in poor contact.

On the other hand, there is a configuration in which an eccentric cam is provided at the tip of the bundle, and the rotation of the eccentric cam pushes a pressure plate and presses the movable side of the contact via a coil spring.

However, the tightening position of the bundle is not clear, making it difficult to operate.The tightening position is not constant and may move due to vibrations, etc., and even if the pressure on the movable side of the contactor is loosened, the pressure of the coil spring Because of this effect, there is a disadvantage that the lamp pin is difficult to remove or insert.

Therefore, an object of this invention is to provide a lamp socket with a clear tightening position, excellent operability, and easy insertion and removal of a lamp pin.

An embodiment of this invention is shown in FIGS. 2 to 4.

That is, in this lamp socket, instead of the adjusting screw 5, an L-shaped bar 12 is pivoted to the fixing plate 13 of the casing 4 (
The working end 14 of the L-shaped bar 12 projects into the housing part, and between this working end 14 and the holder 7 of the contactor 2, there is provided an angle-shaped plate spring 15 that comes into elastic contact with the working end surface.
is used to press the holder 7 and move it relative to the holder 8 by rotating the L-shaped bar 12 (in the direction of arrow A), thereby making it possible to clamp the lamp pin 1 and to In the operating state of the L-shaped bar 12 in the clamped state, a concave-convex engaging portion 16,16' that engages with each other is formed between the working end 14 of the L-shaped bar 12 and the angle-shaped plate spring 15 to maintain the position. On the other hand, compression coil springs 17 and 18 are interposed between the holding bodies 7 and 8 to facilitate the opening operation of the L-shaped bar 12 (in the direction of arrow B, the state shown by the imaginary line). Both facilitate the removal of the lamp pin 1.

In this case, the working end 1 of the operating lever 12 is attached to the chevron leaf spring 15.
4, the spring fulcrum gradually changes with the engaging portions 16, 16' being the maximum, making initial operation easier.

19 is a contact fixing rivet, 20 is a terminal screw, 21 is a lead wire, and 22 is a mounting screw.

With this structure, the lamp can be easily attached and detached by operating the lever 12, and the uneven retaining portions 16 and 16' provide a click action, allowing for reliable setting and preventing the lever from being released due to vibration, etc. during use. In addition, the angle-shaped plate spring has little change over time (due to heat) and can maintain good contact performance over a long period of time.

In addition, the interposition of the coil springs 17 and 18 ensures that the contacts 2 and 3 are separated when the lever 12 is opened, and at the same time, the lever 12 can be opened easily after the concave-convex retaining portions 16 and 16' are removed. Become.

As described above, the lamp socket of this invention includes a pair of contacts 2.3 that sandwich the lamp pin 1 from the lateral direction, a casing 4 that fixes one of these contacts and slidably holds the other. Separating springs 17 and 18 are interposed between the pair of contacts 2 and 3 and biased in the separating direction; A chevron-shaped leaf spring 15 having a top protruding in the direction and having a concave portion 16 or a convex portion formed on the top thereof, and the chevron-shaped leaf spring 1
By pressing and sliding the surface of the angle-shaped plate spring 15 toward the top side, the movable side of the contacts 2 and 3 is attached to the fixed side with the lamp pin. Since the L-shaped operating lever 12 is provided with a convex portion 16' or a concave portion that engages with the concave portion 16 or convex portion of the top portion, the contact can be opened and closed by rotating the operating lever. In addition, a click action can be obtained by the uneven engagement of the top of the angle-shaped leaf spring and the operating lever, and the clamped state of the contact can be reliably maintained. Good contact pressure is obtained, and there are few contact failures due to changes over time.

In addition, the opening spring has the advantage that the opening operation is quick and reliable, and the ramp and pin can be easily inserted and removed.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a conventional lamp socket, Fig. 2 is a perspective view of an embodiment of this invention, Fig. 3 is a vertical sectional view thereof, and Fig. 4 is a perspective view of a conventional lamp socket.
The figure is a half-sectional plan view thereof. 1... Lamp pin, 2, 3... Contact, 4... Casing, 12... Operation lever, 14... Working end, 15... Chevron leaf spring, 16. 16'... Concave/convex retaining portion, 17.
18... Coil spring (spring spring).

Claims (1)

[Scope of utility model registration request] A pair of contacts 2 and 3 that sandwich the lamp pin 1 from the lateral direction
, a casing 4 that fixes one of these contacts and slidably holds the other, and separation springs 17 and 1 that are interposed between the pair of contacts 2 and 3 and biased in the separation direction.
8, an angular leaf spring 15 which is provided on the movable side of the contacts 2 and 3 and opposite to the individual side and has a top projecting outward and has a four part 16 or a convex part formed on the top; The movable sides of the contacts 2 and 3 are pivoted to the casing 4 opposite to the top side of the leaf spring 15, and the movable sides of the contacts 2 and 3 are moved to the fixed side by pressing and sliding the surface of the angle-shaped leaf spring 15 toward the top side. While pressing it into the attached state, the recess 16 in the top part
Alternatively, a lamp socket is provided with an L-shaped operating lever 12 formed with a convex portion 16' or a concave portion that engages with the convex portion.