JPH02827Y2 - - Google Patents

Description

[Detailed description of the invention] This invention connects a movable contact piece to a common terminal disposed opposite to a fixed terminal in a swingable manner, and causes the movable contact piece to perform a seesaw motion. The present invention relates to a switch formed to connect and separate a fixed terminal and a fixed terminal.

Figure 1 shows the structure of a conventional switch. That is, a common terminal 3 is provided between the fixed terminals 1 and 2 that are installed at a constant interval on the inner bottom surface of the insulating case 9,
A middle part of a movable contact piece 4 is swingably assembled to the upper end of this common terminal 3, and a pin 8 is housed together with a spring 7 in a recess 6 provided on the lower surface of a driver 5 disposed on the movable contact piece 4. The tip is press-contacted to the top surface of the movable contact piece 4, and the contact position of the pin 8 is moved left and right around the common terminal 3 by using the long hole 11 of the cover 10 placed over the top surface of the insulating case 9 as a guide to operate the driver 5. By sliding, the movable contact piece 4 is caused to perform a seesaw movement,
It was configured so that both ends of the movable contact piece 4 and the fixed terminals 1 and 2 were brought into contact with and separated from each other.

In such a conventional switch, the pin 8 slides on the movable contact piece 4 and comes into contact with it, so a frictional feeling is transmitted to the operator's hand, making the operation feel unclear, and the number of component parts is small. In many cases, the spring 7 and pin 8 tend to fall off during switch assembly, which is disadvantageous in terms of cost and assembly man-hours.

The present invention aims to eliminate the above-mentioned drawbacks of the conventional switch and provide a switch with a good operating feel.

That is, in order to achieve the above object, the present invention provides a cut-and-raised piece rising upward in the middle of the movable contact piece whose middle portion is supported by the common terminal, and a spring is installed between the cut-and-raised piece and the common terminal. Installed under tension or compression,
The present invention aims to provide a switch with an excellent operating feel by controlling the upper end of the cut-and-raised piece with a drive body and moving the movable contact piece in seesaw motion.

Embodiments of the present invention will be described below with reference to FIGS. 2 to 4.

First, in the embodiment shown in FIGS. 2 and 3,
12 is a case formed of an insulating material such as synthetic resin so as to have an open top surface;
A common terminal 13 is implanted in the center of the inner bottom surface, and fixed terminals 14 and 15 are implanted on both sides of this common terminal 13. A stepped recessed part 16 is provided at the center of the upper part of the common terminal 13, and this recessed part 16
A movable contact piece 18 is swingably incorporated into the holder by using notches 17 provided on both sides of the central portion. This movable contact piece 18 is provided with a frame-shaped cut-out piece 20 that protrudes upward at the center and has a slit 19 at the center, and the upper part of this cut-out piece 20 and the recessed part 16 of the common terminal 13 are provided.
Locking holes 21 and 22 are provided in the lower part of the holder, and both ends of a coiled spring 23 are locked between the locking holes 21 and 22.

In addition, the upper part of the case 12 has a recess 2 at the center of the lower surface.
A driving body 25 provided with a groove 4 is slidably disposed, and the upper end of the cut-and-raised piece 20 is fitted into the recess 24 of the driving body 25.

Furthermore, a portion of the drive body 25 protrudes outward from a long hole 27 of a cover 26 placed over the top surface of the case 12, and is adapted to slide along this long hole 27.

Further, in the embodiment shown in FIG. 4, engagement grooves 16a are provided on both sides of the recessed part 16 of the common terminal 13, and the notches 1 on both sides of the center of the movable contact piece 18 are provided in the engagement grooves 16a.
7 is fitted to create a retaining structure, and the frame-shaped cut-and-raised piece 2
0 and the common terminal 13, a coiled spring 23 is compressed and fitted between locking protrusions 28 and 29 provided at the center of the lower end of the recessed part 16 of the common terminal 13.

When the driver 25 is operated with such a configuration, the upper end of the cut and raised piece 20 is pressed by the recess 24 of the driver 25, and as the cut and raised piece 20 swings, the locking portion of the common terminal 13 is pressed. Spring 23 acting on locking portions 22, 28 of cut and raised piece 20 with 22, 29 as fulcrums
Since the pulling force or pressing force of the movable contact piece 18 is reversed, the movable contact piece 18 performs a seesaw movement around the common terminal 13, and both ends of the movable contact piece 18 are brought into contact with and separated from the fixed terminal 14 or 15.

By making the width l of the notch 17 of the movable contact piece 18 larger than the thickness of the common terminal 13, the movable contact piece 18 slides on the contact portion when coming into contact with and separating from the fixed terminals 14 and 15, thereby achieving a self-cleaning effect. Obtainable.

As the switch of the present invention is constructed as described above, the movable contact piece is biased by the reversing force of the spring during operation, so there is no feeling of friction and an excellent operating feel is obtained, and the only component is the spring. Since pins and the like are unnecessary, there are fewer pins, which is advantageous in terms of cost, improves ease of assembly, enables mass production, and provides stable operation, which is of great practical value.

In addition, the present invention has a structure that can be implemented in push switches, tumbler switches, etc. in addition to the slide switch of the embodiment by making slight changes to the drive body. This has great practical value as it allows for the standardization and common use of circuit switching parts such as contacts.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a conventional switch, Fig. 2 is a sectional view showing one embodiment of the switch of the present invention, Fig. 3 is a perspective view of the same main part, and Fig. 4 is a main part of another embodiment. FIG. 12...Case, 13...Common terminal, 14,1
5... Fixed terminal, 16... Recessed portion, 17... Notch, 18... Movable contact piece, 19... Slit, 20
... cut and raised piece, 21, 22 ... locking hole, 23 ... spring, 24 ... recess, 25 ... drive body, 26 ... cover, 27 ... long hole, 28, 29 ... locking protrusion Department.

Claims (1)

[Scope of utility model registration request] A common terminal and a fixed terminal are provided on the insulator at a constant interval, the middle part of a movable contact piece is swingably engaged with the upper end of the common terminal, and a notch protruding upward is provided at the center of the movable contact piece. A raised piece is provided, a coiled spring is tensioned or compressed and installed between the cut piece and the common terminal, the upper end of this cut piece is engaged with a driving body, and the driving body is slid. Naru switch.