JPS63166117A - Push switch - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a push switch used in car radios, car stereos, and the like.

2. Description of the Related Art A conventional push switch will be explained with reference to FIGS. 4, 6, and 6(&) to (f).

FIG. 4 is an exploded perspective view of a conventional push switch, FIG. 6 is a sectional view of the same push switch, and FIGS.

In Figures 4 and 5, 1 is a box-shaped first box made of synthetic resin.
This case holds fixed contacts 4 and 5 that are electrically connected to external connection terminals 2 and 3, respectively.

11 is a rotating body made of synthetic resin, and a ratchet part 12 in the center
Cam parts 13 and 14 are provided on both sides of the support parts 15 and 16, which are rotatably held around a constant center by the groove parts 6 and 7 of the first case 1 and the second case 21.
i is provided.

Inside the box-shaped second case 21 made of synthetic resin, fixed contacts 4.
It holds movable contacts 24 and 26 which come into elastic contact with each other.

Reference numeral 31 denotes a driving body made of synthetic resin and having a mouth-shaped cross section, and is provided with guide parts 32 and 33 that fit into grooves 26 and 27 of the case 21, respectively, so that it can move linearly.
A feeding stiffener 36 that engages with the ratchet portion 12 of No. 1 from above.
It has two elastic claws: and a return claw 36 that engages from the bottom.

Reference numeral 41 refers to the spring receiver portion 8 and the driver 3 of the first case 1.
The spring receiver 1 is a conical coil spring that comes into contact with the portion 37 and applies stress in the direction of fully returning the driver 31 in response to the pushing motion of the driver 31.

Next, the operation of this switch will be explained based on FIG. 6, dividing it into circuit opening operations and circuit closing operations.

Regarding the operation of the circuit, the first circuit will be explained, and the same applies to the other circuit.

(1) Circuit opening operation When the shaft 61 is pushed in the direction of the arrow in FIG. 6 (IL),
The driving body 31 in contact with the shaft 61 also moves in the same direction, and Φ
) When the position shown in ) is reached, the feed lug 35 of the driving body 31 pushes the crest 61 of the ratchet part 12 of the rotary body 11, and the rotary body 1
1 rotates counterclockwise around the support 15,16.

If the push is continued and the position shown in (0) is reached, the return claw 36 of the elastic drive body 31 overcomes the ridge 62 of the ratchet portion 12 of the rotary body 11, producing mechanical moderation. At this time, the peak portion 63 of the cam portion 130, which is rotating at the same time as the ratchet portion 12 of the rotating body 11, pushes up the bent portion 29 provided on the movable contact 24, and pushes up the dowel of the movable contact 24 that is in elastic contact with the fixed contact 4. Section 62 is separated and the circuit is opened.

When the shaft 51 is returned, the driving body 31 returns due to the action of the spring 41, and the return claw 36 pushes the ridge 64 of the ratchet portion 12 of the rotating body 11.

When the driving body 31 returns to the position shown in (d), the feeding V-piece 36 of the driving body 31 with elastic metal overcomes the crest 65 of the ratchet portion 12 of the rotary body 11, and mechanical return moderation occurs.
Finish the circuit opening operation. (+5) (2) When the shaft 51t- is pushed again from the state of the circuit closing operation (+5), the rotating body 11 rotates counterclockwise as before, and when it reaches the position (f), the same as above. The return claw 36 of the elastic drive body 31 overcomes the crest 66 of the ratchet portion 12 of the rotary body 11 to generate mechanical moderation. At this time, the bent part 29 of the movable contact 24 enters the valley part 67 of the cam part 13 which is rotating at the same time as the ratchet part 12 of the rotating body 11, and the movable contact 2
The dowel portion 62 of No. 4 comes into elastic contact with the fixed contact 4, and the circuit is closed.

Similar to the opening operation described above, by returning the shaft 61, a mechanical return mode is generated, and the closing operation of the circuit is completed (&).

The above (1) circuit opening operation and (2) circuit closing operation are repeated every time the shaft is pressed, and the opening and closing operation of the switch is established.

Problems to be Solved by the Invention However, the overall length of a push switch having such a configuration is determined by the length of the driving body 31, which is determined by the rotating body 11, the forwarding part 36, the returning part 36, and the spring catch part 37; The compression height of the spring 41 and the spring receiver of the first case 1 are determined by the thickness of the portion 8 and the driving stroke. Therefore, when shortening the overall length dimension, it is possible to consider a method of minimizing the number of these components, but each dimension also has a limit, and the drive speed is limited.

- There was a problem in making the device smaller (thinner) without changing the circuit and the circuit switching position.

In view of the above problems, the present invention provides a push switch having a shorter overall length than conventional push switches.

Means for Solving All Problems In order to solve the above problems, the present invention includes a box-shaped first case made of synthetic resin that holds all of the fixed contacts and their external connection terminals, and a movable case that comes into elastic contact with the fixed contacts. A second case made of synthetic resin that holds all the contacts and their external connection terminals, and the first case. A rotary body in which a ratchet part and a cam part are integrally formed of synthetic resin and are rotatably supported in a housing in which a second case is engaged; a driving body made of synthetic resin having a forwarding part (or returning part) that engages from the top and a returning part (or sending part) that engages from the bottom; both ends of which are held in the first case, and a central U-shaped part. comes into contact with the driving body,
It is constituted by a torsion coil spring which exerts stress in a direction in which the drive body is deformed in response to the pushing operation of the drive body due to the springiness of the coil portion between the central mouth-shaped portion and the fixing portions at both ends.

Function: Compared to the conventional push switch where the spring is located coaxially with the operating shaft, the spring of the present invention is located on both sides of the driver at the front of the movable contact as described above, and the spring is the element that completely determines the overall length. It is possible to reduce the compression height of the spring and the length of the spring receiver of the drive body, making it possible to significantly shorten the overall length.

Embodiment Hereinafter, an embodiment of the present invention is shown in Figs. 1, 2, and 3 (
This will be explained in 2L) to (f). Note that all parts that are the same as those in the prior art are given the same numbers, and explanations will be omitted.

In FIGS. 1 and 2, the driving body 71 is provided in grooves 82, 83, .
The guide portions 72, 73, and 74'i are fitted into the guide portions 72, 73, and 74'i, respectively, and are shaped so that the ratchet portion 12 of the rotating body 11 is hooked and rotated when the drive body 71 is returned in the same direction as the feed jaw 35. A dumearo is provided.

The return jaw 76 has a hook surface 75 at the same position as the length from the conventional front part to the tip of the return jaw 36.

The case 91 also includes spring holding holes 92, 93 and spring coil portions 104. Coil contact part 9 that contacts IQ5
4.95'i is provided.

101 is inserted into the spring holding holes 92.93 of the first case 91 at both ends 102, 103i, and the coil parts 104, 1
05 is in contact with the coil abutting portions 94 and 95 of the case 91, and the front portion of the central U-shaped portion 106 is a torsion coil spring that abuts on the spring receiver 77 of the driver 71. It has coils on both sides and extends horizontally from there.

Since the operation of this switch does not change the movements of the rotating body 11 and the movable contact 24, only the circuit opening operation will be explained based on FIG. 3. The closing operation is shown in the figure (only 0 is performed.

When the shaft 61 is pushed in the direction of the arrow in FIG. The opening angle becomes smaller and stress is generated in the direction of return. When the position shown in (b) is reached, the feed lug 35 of the drive body 71 pushes the crest 61 of the ratchet portion 12 of the rotary body 11, and the rotary body 11 rotates counterclockwise around the support portion 15.16'i.

When the pressure was continued and the position shown in (c) was reached, it became elastic. The hooking surface 76 of the return jaw 76 of the driving body 71 climbs over the crest 82 of the ratchet portion 12 of the rotary body 11 to generate mechanical moderation. At this time, the peak part 63 of the cam part 13, which is rotating at the same time as the ratchet part 12 of the rotating body 11, pushes up the bent part 29 provided on the movable contact, and the dowel part of the movable contact 24 that is in elastic contact with the fixed contact. 52 left,
The circuit is opened.

When the shaft 51 is returned, the driver 71 returns due to the action of the spring 101, and the hooking surface 75 of the return jaw
hits the ridge 64 of the ratchet portion 12 of the rotary body 11, causing the rotary body 11 to rotate counterclockwise.

When the driving body 71 returns to the position shown in (d), the elastic feed member 35 of the driving body 71 crosses over the peak 65 of the ratchet portion 12 of the rotary body 11, and mechanical return moderation occurs.
Finish the circuit opening operation. (θ) Effects of the invention As described above, the push switch according to the present invention has been made smaller (
can be made thinner).

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of a push switch according to an embodiment of the present invention, FIG. 2 is a partially sectional side view of the push switch,
3(a) to 3(f) are diagrams showing the opening/closing operation of the push switch, FIG. 4 is an exploded perspective view of the conventional push switch, and FIG. 6 is a partially sectional side view of the push switch. Figures (&) to (0 are diagrams showing the opening/closing operation of the push switch. 71...driver, 81...second case, 91...°th Case 1, 106...
・Torsion coil spring. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 1 Case t Figure 2 Figure 4

Claims (2)

[Claims] (1) A box-shaped first case made of synthetic resin that holds a fixed contact and its external connection terminal, and a second case made of synthetic resin that holds a movable contact that makes elastic contact with the fixed contact and its external connection terminal. a rotating body which is capable of linear reciprocating movement and is rotatably supported in a housing in which the first and second cases are engaged and has a ratchet part and a cam part integrally formed of synthetic resin; a synthetic resin driving body having a feed piece (or return piece) that engages with the ratchet portion of the rotating body from the top and a return piece (or feed piece) that engages from the bottom, and both ends of which are held in the first case; The central ■-shaped portion contacts the driver, and stress is applied in the direction of returning the driver in response to the pushing motion of the driver due to the springiness of the coil portion between this central ■-shaped portion and the fixing portions at both ends. A push switch composed of a torsion coil spring. (2) The push switch according to claim 1, wherein the two claw portions of the drive body extend upward and downward from the same direction and have a U-shaped cross section.