JPH0845383A - Interlocking type push switch - Google Patents

Abstract

PURPOSE:To provide an interlocking type push switch suitable for reducing its thickness. CONSTITUTION:A wafer 11 having fixed contacts 12 and 13 has an interlocking cam plate 17 and a frame plate 18 mounted on the wafer 11, the wafer 11 and frame plate 18 nip movably a movable supporting part 22 formed on one side of an operating body 15. A cam part 24 for driving the interlocking cam plate 17 is formed on the other side of the operating body 15, and a moving contact 14 and return spring 16 are housed in the rear side of the operating body 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a push switch used as a switch for operating a headphone stereo, and more particularly to a reset mechanism for automatically returning another operating body to an initial position by pushing an arbitrary operating body. The interlocking push switch provided.

[0002]

2. Description of the Related Art As interlocking push switches, those disclosed in Japanese Utility Model Laid-Open No. 59-17527 are widely known.

FIG. 5 is an exploded perspective view showing such a conventional example, and FIG. 6 is a side view showing a partial cross section of a switch body used therein. As shown in FIG. 5, a plurality of switch main bodies 1 are assembled in a row in a fixed frame 4, and an interlocking spring 5 is constantly urged between the case 2 and the fixed frame 4 of each switch main body 1. The interlocking cam plate 3 is interposed. As shown in FIG. 6, the operating rod 6 of each switch body 1 is provided with a cam portion 6a having an engaging recess 6b, and the interlocking spring 5 urges the interlocking spring 5 to the right in FIG. The engagement portion 3a of the cam plate 3 is adapted to elastically contact the cam portion 6a.
Further, a fixed contact piece (not shown) is provided in the case 2 of each switch body 1, while a movable contact piece (not shown) is provided in the contact piece holding portion 6c of the operating rod 6 housed in the case 2. Is provided, and the contact piece holding portion 6c is biased toward the ceiling portion 2b of the case 2 by the return spring 7 that elastically contacts the inner bottom portion 2a of the case 2. The case 2 of each switch body 1
Is configured by combining an upper case and a lower case as shown.

In the interlocking push switch constructed as described above, when the operating rod 6 is in the initial position where it is not pushed in like the switch body 1 shown in FIG. 6, the movable contact piece and the fixed contact piece are in contact. Are in a switch-off positional relationship, and the switch body 1 is kept in an off state. Then, when the operating rod 6 is pushed in against the spring force of the return spring 7 from this state, the engaging portion 3a of the interlocking cam plate 3 resists the spring force of the interlocking spring 5 by the cam portion 6a, and the operation shown in FIG. Although it moves to the left, when the operating rod 6 is pushed for a predetermined stroke, the engaging portion 3a is retracted into the engaging recess 6b by the spring force of the interlocking spring 5, so the pushing operating force is removed and the operating rod is removed. When 6 is lifted by the return spring 7, the engaging portion 3a locks the cam portion 6a and the operating rod 6 is locked. At this time, since the contact piece holding portion 6c is lowered by a predetermined amount in the case 2, the movable contact piece and the fixed contact piece are switched to the switch-on positional relationship, so that the operating rod 6 is set to the on position. It will be locked and this switch body 1
Is kept on.

When one of the operating rods 6 is locked in the ON position and one of the other operating rods 6 in the initial position is pushed in, the interlocking cam is caused by the cam portion 6a of the pushed operating rod 6. Since the plate 3 moves to the left in FIG. 6, the interlocking cam plate 3 is disengaged from the engagement recess 6b of the operating rod 6 in the locked state, and as a result, the operating rod 6 of the switch body 1 in the ON state is returned. The spring 7 moves up to the initial position and the switch body 1 is switched to the off state.

[0006]

By the way, in the above-mentioned conventional interlocking type push switch, the operating rod 6, the contact piece holding portion 6c and the return spring 7 are sequentially laminated along the pushing operation direction of the operating rod 6. Since a certain amount of thickness is required to install these parts,
Even if the thickness dimension of each component is reduced, there is a limit to the reduction in thickness, and it has been difficult to achieve further reduction in thickness.

The present invention has been made in view of the actual situation in the prior art as described above, and an object thereof is to provide an interlocking push switch suitable for thinning.

[0008]

In order to achieve the above object, the present invention provides a plurality of operating bodies which are arranged in a row and each of which is biased by a return spring, and which engages with each operating body. And an interlocking cam plate that is driven by pushing the operating body against the return spring, so that another operating body is automatically returned to the initial position by pushing the arbitrary operating body. In the interlocked push switch,
A wafer having a plurality of fixed contacts on the inner bottom and accommodating the interlocking cam plate, a plurality of movable contacts that come into contact with the fixed contacts by the operation of the operating body, and the operating body crowned on the wafer. And a frame plate having a plurality of openings that respectively expose a part of the operation body, and a rotation fulcrum portion that rotatably supports the operation body is provided on one side portion of the operation body,
The most main feature is that a cam portion for driving the interlocking cam plate is provided on the other side portion of the operating body, and the movable contact and the return spring are housed on the rear surface side of the operating body. .

[0009]

According to the above means, when the operator pushes in an arbitrary operating body against the elastic force of the return spring, the operating body is fulcrumed at the pivotal fulcrum portion provided on one side thereof. And the movable contact comes into contact with the fixed contact to be turned on, and the cam portion provided on the other side portion of the operating body is locked by the back surface of the edge portion of the interlocking cam plate, so that the operator Even if the pushing operation of the operating body is stopped, the operating body is held at the pushing position. Further, when the operator operates another operating body in such a pushed-in state, the operating body is held at the pushed-in position as described above, but during the operation, the cam portion engages with the edge portion of the interlocking cam plate. Since the interlocking cam plate is moved by the lever, the operating body already held at the pushed-in position is automatically returned to the initial position after the engagement between the cam portion and the interlocking cam plate is released.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 is a cross-sectional view showing an interlocking push switch according to an embodiment of the present invention, FIG. 2 is a plan view showing a state in which a frame plate is removed from the interlocking push switch, and FIG. 3 is provided for the interlocking push switch. FIG. 4 is an enlarged cross-sectional view showing a protrusion provided on a side portion of the operating body, which is an explanatory view of the operation of the operating body.

In these figures, reference numeral 11 denotes a wafer made of a synthetic resin material, and one common fixed contact 12 and four fixed contacts 13 are provided on the inner bottom portion 11a of the wafer 11, and these are provided. Fixed contacts 12, 1
A movable contact 14 is provided on each of the three. Each movable contact 14 is made of a thin metal plate having elasticity, and has a leg portion 14a that is in constant contact with each fixed contact 13 and another leg portion 14b that can be contacted with and separated from the common fixed contact 12. The legs 14a and 14b intersect each other in a substantially X shape as shown in FIG. 1 by cutting and raising the elastic metal plate.

Reference numeral 15 indicates an operating body, and this operating body 15
Are arranged in rows along the longitudinal direction of the wafer 11. The movable contact 14 is mounted on the back surface side of each operation body 15, and each operation body 15 has a return spring 16 respectively.
Is urged in the returning direction, that is, in the upward direction in FIG.

Reference numeral 17 denotes an interlocking cam plate, which is housed in the wafer 11 and is shown in FIGS.
It can be moved in the left and right directions. A pair of interlocking springs 17a is provided between one end of the interlocking cam plate 17 in the longitudinal direction and the side portion of the wafer 11, and the interlocking springs 17a.
The interlocking cam plate 17 is urged to the left in FIGS. The interlocking cam plate 17 is formed with three rectangular holes 17b, and the operating body 15 closest to the interlocking spring 17a and the two operating bodies 15 in the middle are inserted into the respective holes 17b. . On the other hand, the interlocking spring 17
The operating body 15 farthest from a is engaged with one end of the interlocking cam plate 17. Further, a frame plate 18 is capped on the wafer 11, and the frame plate 18 has four circular openings 19 exposing a part of each operating body 15.

The operating body 15 is made of an elastic synthetic resin material, and has an operating portion 21 projecting upward from the opening 19.
The rotary fulcrum portion 22 protruding outward from one side portion of the operating portion 21 and the projection 23 protruding outward from the other side portion of the operating body 15 are integrally configured. A hollow portion for accommodating the movable contact 14 and the return spring 16 is formed on the rear surface side of the actuating portion 21, and the projection 23 has a cross section of "ku" that engages with the edge portion of the interlocking cam plate 17. A character-shaped cam portion 24 is formed, and an upper surface of the cam portion 24 serves as a locking portion 25 that is locked by the back surface of the interlocking cam plate 17 when the operation body 15 is pushed. Further, this locking portion 2
When the operating body 15 is returned, 5 is locked on the back surface of the edge portion forming the opening 19 of the frame plate 18, and functions as a stopper for stopping the returning operation of the operating body 15. The rotation fulcrum portion 22 is sandwiched between the wafer 11 and the frame plate 18, and in this state, the operation portion 21 of the operation body 15 is rotatably supported.

In the interlocking type push switch configured as described above, as shown in FIG. 3A, the left side of the initial position when the operating body 15 on the right side of the figure is held at the pushing position. The operating portion 21 of the operating body 15 is returned to the return spring 1
When it is pushed in against the elastic force of 6, the operating portion 21 rotates in the clockwise direction in the drawing with the rotation fulcrum portion 22 as a fulcrum. As a result, the legs 14a and 14b of the movable contact 14 are elastically deformed, and the legs 14b apart from each other are fixed to the common fixed contact 1
Fixed contact 13 and common fixed contact 1 for contacting 2
2 is conducted through the movable contact 14 and the switch is turned on. At this time, as shown in FIG. 3 (b), the slope of the V-shape of the cam portion 24 is the interlocking cam plate 17.
Of the interlocking cam plate 1 by engaging with the edge portion forming the hole 17b of
7 is moved to the right in the figure against the interlocking spring 17a, the operating body 15 on the right side, which is locked by the interlocking cam plate 17 at the pushing position, automatically returns to the initial position. Next, as shown in (c) of FIG. 3, when the operating body 15 on the left side is further pushed in, the cam portion 24 moves from the front surface to the rear surface of the interlocking cam plate 17, and the locking portion on the upper surface of the cam portion 24. 25
Comes into contact with the back surface of the edge portion of the interlocking cam plate 17 forming the hole 17b, the locking portion 25 is locked by the interlocking cam plate 17, and the operator stops the pushing operation of the operating body 15 and the operating portion. Even when the hand is released from 21, the operating portion 21 is held in the pushing position.

In the state shown in FIG. 3C, when the operator pushes in any other operation body 15 including the right operation body 15, the operation of the left operation body 15 is performed in the same manner as described above. Since the locking state between the stopper 25 and the interlocking cam plate 17 is released, the operating body 15 is returned to the initial position by the urging force of the return spring 16, and the leg portion 14b of the movable contact 14 is fixed to the fixed contact 1.
2 is separated from 2 and returns to the off state, and
5 is brought into contact with the back surface of the edge portion of the frame plate 18 forming the opening 19 and locked, whereby the operating body 15 on the left side is stopped at the initial position shown in FIG.

As described above, in the above embodiment, the rotation fulcrum 2
Since the operating portion 21 of the operating body 15 rotates about the fulcrum 2 and the movable contact 14 and the return spring 16 are accommodated on the back side of the operating portion 21, each part of the switch is pushed along the pushing operation direction as in the conventional case. Compared with the one in which the layers are sequentially stacked, the total thickness of the interlocking push switch can be reduced, and the thickness can be reduced.

Further, in the above embodiment, the interlocking cam plate 17 is driven by the cam portion 24 of the projection 23, and the locking portion 25 on the upper surface of the cam portion 24 also serves as a stopper for stopping the returning operation of the operating body 15. Therefore, as compared with the case where the cam portion and the stopper are separately provided, the structure of the operating body 15 can be simplified, and the interlocking push switch can be downsized.

Further, in the above embodiment, since the operating body 15 is rotatably supported by the rotating fulcrum portion 22 and the rotating fulcrum portion 22 is sandwiched between the wafer 11 and the frame plate 18, the operating body 15 is operated. Occasionally, problems such as wobbling and rattling do not occur, and the ON / OFF switching operation can be performed in a stable state, and a good operation feeling can be obtained.

[0020]

As described above, according to the present invention,
Since the operating body rotates around the pivot point as a fulcrum and the movable contact and the return spring are housed on the back side of the operating body, compared to the conventional one in which switch components are sequentially stacked along the pushing operation direction. Thus, the total thickness of the interlocking push switch can be reduced, and the thickness can be reduced.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an interlocking push switch according to an embodiment of the present invention.

FIG. 2 is a plan view showing a state where a frame plate is removed from the interlocking push switch.

FIG. 3 is an operation explanatory diagram of an operating body provided in the interlocking push switch.

FIG. 4 is an enlarged sectional view showing a protrusion provided on a side portion of the operating body.

FIG. 5 is an exploded perspective view showing a conventional example of an interlocking push switch.

FIG. 6 is a side view showing a partial cross section of a switch body used in the interlocking push switch of FIG.

[Explanation of symbols]

 11 Wafer 11a Inner Bottom 12, 13 Fixed Contact 14 Movable Contact 15 Operating Body 16 Return Spring 17 Interlocking Cam Plate 18 Frame Plate 19 Opening 21 Actuator 22 Rotational Support Point 23 Protrusion 24 Cam 25 Locking

Claims (2)

[Claims] 1. A plurality of operating bodies which are arranged in a row and are biased by respective return springs, and an operation body which engages with each operating body and pushes any one of the operating bodies against the return spring. In the interlocking push switch, which is equipped with an interlocking cam plate driven by, and which automatically returns the other operating body to the initial position by the pushing operation of the arbitrary operating body,
A wafer having a plurality of fixed contacts on the inner bottom and accommodating the interlocking cam plate, a plurality of movable contacts that come into contact with the fixed contacts by the operation of the operating body, and the operating body crowned on the wafer. And a frame plate having a plurality of openings that respectively expose a part of the operation body, and a rotation fulcrum portion that rotatably supports the operation body is provided on one side portion of the operation body,
A cam portion for driving the interlocking cam plate is provided on the other side portion of the operating body, and the movable contact and the return spring are housed on the back side of the operating body. . 2. The interlocking type push switch according to claim 1, wherein a part of the cam portion is locked to a back surface of the frame plate when the operating body is returned.