JPH04129440U - Seesaw switch - Google Patents

Abstract

(57) [Summary] [Objective] The object of the present invention is to provide a seesaw switch whose terminal base can be easily and inexpensively processed and whose movable contact piece can swing smoothly. [Configuration] Terminal base 11 has a pair of fixed contacts 1
2 is provided. The movable contact piece 13 is provided at both ends with movable contacts 14 capable of approaching and separating from each of the fixed contacts 12, and has a curved swing fulcrum portion 15 formed at its center. The movable contact piece 13 is disposed on the terminal base 11 so as to be swingable about the swing fulcrum 15. The movable contact piece 13 is
The swinging fulcrum part 15 swings while contacting the fixed contacts 12 on the surface of the terminal base 11, and the movable contacts 1 at both ends
4 to each fixed contact 12 alternately.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is a seesaw switch that performs on/off operation by swinging a movable contact piece. This is related to Chi.

0002

[Conventional technology]

Conventionally, a seesaw switch has been disclosed, for example, in Japanese Utility Model Application Publication No. 52-86675. There is something to show. This seesaw switch is installed protruding from the terminal base 20 as shown in FIG. The movable contact piece 22 is swingably placed on the supporting piece 21 that has been By swinging the freely attached switch knob 24, the movable contact piece 2 2 is driven to change the switch.

0003

[Problem that the idea aims to solve]

However, in the seesaw switch, the support piece 21 is connected to the terminal base 2. Since it has to protrude from 0, it becomes larger and when insert molding is used. , the mold structure became complicated, leading to increased costs. Further, the movable contact piece 2 2 swings in contact with the upper end surface of the support piece 21, so the center of swing is on both sides of the upper end surface. This resulted in changes between the side edges, making it impossible to swing smoothly. In view of the above problems, the present invention allows the terminal base to be easily and inexpensively processed. Moreover, it is a seesaw switch that allows the movable contact piece to swing smoothly. The purpose is to provide the following.

0004

[Means to solve the problem]

In order to achieve the above object, the present invention has a terminal base having a pair of fixed contacts. and a movable contact piece having movable contacts at both ends capable of approaching and separating from each of the fixed contacts. is arranged so as to be able to swing freely around a curved swing fulcrum provided in its center. It is something.

[0005]

【Example】

Next, an embodiment of the seesaw switch according to the present invention will be explained with reference to the attached drawings. explain. As shown in Fig. 1, this seesaw switch has a casing 1, a switch knob 3, and the swinging member 5 to which this switch knob 3 is attached, and the fixed contacts 12a, 12b. A terminal base 11 having a A movable contact piece 13 having movable contacts 14a and 14b is provided.

[0006] The switch knob 3 is formed of a synthetic resin material into a cylindrical shape with a bottom. A pair of locking portions 4, 4 respectively protrude from the surface. The swinging member 5 is housed in the casing 1 so as to be able to swing around the fulcrum 6. A recess 7 is provided at the tip of the recess 7, and a spring 8 is applied to the recess 7. A pressing member 9 that is biased in the projecting direction is accommodated. And at the rear end there is one A pair of locking receiving parts 10, 10 are formed, and the locking parts 4, 4 of the switch knob 3 are locked. As a result, the swinging member 5 and the switch knob 3 are integrated. .

[0007] The terminal base 11 is made of synthetic resin and has a fixed contact 12a having a substantially L-shaped cross section. 12b and the electrical connection part 12c are insert molded. Said electrical connection The portion 12c is located between the fixed contacts 12a and 12b. Fixed contacts 12a, 12 b and one piece of each of the electrical connection portions 12c are exposed toward the swinging member 5 side, These other pieces penetrate the casing 1 and protrude downward as connection terminals.

[0008] As shown in FIG. 2, the movable contact piece 13 is formed by extrusion processing at both ends. It has movable contacts 14a and 14b, respectively. And this movable contact piece 1 The center part of 3 extends to both sides, and a swing fulcrum part 1 is formed in the center by extrusion processing. 5 and 15 are formed, respectively. This swing fulcrum part 15 (one not shown) is , located between the protruding walls 2, 2 protruding from the inner wall of the casing 1, and having both edges thereof being guided.

[0009] In the seesaw switch made of the above-mentioned components, the switch knob 3 is not pressed. In the off state, the swinging member 5 rotates counterclockwise around the fulcrum 6, as shown in FIG. It is swinging in the rotational direction. The pressing member 9 of the swinging member 5 is one of the movable contact pieces 13 (the right side part in FIG. 1), and this movable contact piece 13 is centered around the swinging fulcrum part 15. By swinging the movable contact 14a clockwise, the movable contact 14a is closed to the fixed contact 12a. has been completed.

0010 In this state, if you press the protruding part (right side in Figure 1) of the switch knob 3, , this switch knob 3, together with the swinging member 5, rotates clockwise around the fulcrum 6. swing in the direction. As a result, as shown in FIG. 3, the pressing member 9 of the swinging member 5 is The movable contact piece 13 is slid from the right side to the left side, and the movable contact piece 13 is moved to the swing fulcrum part 15. oscillate counterclockwise around the center. In this case, the outside of the swing fulcrum portion 15 is Since the surface is curved, this rocking motion is smooth and stable. So Then, the movable contact 14a is separated from the fixed contact 12a, and the movable contact 14a at the other end is separated from the fixed contact 12a. Contact 14b closes and switches to fixed contact 12b, and the switch returns to the on state. do.

[0011] Also, from the on state, press the flat part of the switch knob (the left part in Figure 1). When pressed, the swinging member 5 swings counterclockwise about the fulcrum 6. As a result, the pressing member 9 slides from the left side to the right side of the movable contact piece 13, and this movable contact piece 13 slides from the left side to the right side. The movable contact piece 13 is swung clockwise about the fulcrum 15. and , the movable contact 14b opens from the fixed contact 12b, while the movable contact 14a opens from the fixed contact. The switch is switched to point 12a, and the switch is turned off.

0012

[Effect of the idea]

As is clear from the above explanation, according to the seesaw switch according to the present invention, it is possible to Since a swinging fulcrum is provided on the movable contact piece, the terminal base can be There is no need to form a bearing piece on the terminal base, making it easy to form this terminal base. In addition, it can be made at low cost and downsized. In addition, since the swing fulcrum has a curved shape, the movable contact piece swings smoothly. It becomes clearer and its operation becomes more stable.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a seesaw switch showing an off state.

FIG. 2 is a perspective view of a movable contact piece and a fixed contact.

FIG. 3 is a sectional view of the seesaw switch showing the on state.

FIG. 4 is a sectional view of a conventional seesaw switch.

[Explanation of symbols]

3... Switch knob, 5... Swinging member, 11... Terminal base, 12a, 12b... Fixed contact, 13... Movable contact piece,
14a, 14b...movable contact, 15...swing fulcrum part.

Claims (1)

[Scope of utility model registration request] Claim 1: A swinging fulcrum part in the shape of a curved surface, which is provided in the center of a terminal base having a pair of fixed contacts, and a movable contact piece having movable contacts at both ends that can make contact with and separate from each of the fixed contacts. A seesaw switch characterized by being arranged so that it can swing freely around the center.