JPH0660768A - Detection switch - Google Patents

Abstract

PURPOSE:To stabilize a contact opening and closing position by eliminating the sagging of an elastic movable plate for transmitting the displacement of an operation button to a movable piece and to extend the life by lessening the spring stress and to improve the contact reliability. CONSTITUTION:An elastic movable plate 11 for transmitting the displacement of an operation button 4 which is supported in a case 1 in freely sliding and moving way is divided into a plurality of plate pieces 11A-11C in the width direction of the plate and among them, the middle part of one plate piece 11B is brought into contact with a movable piece 8 and at the same time the end part 11b is made to be a free end. Further, the end parts 11a, 11c of other plate pieces 11A, 11C are fixed in the case l and thus the elastic movable plate 11 is prevented from sagging until the displacement degree of the operation button 4 exceeds a prescribed level.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is mounted on, for example, a video device, an audio device, etc., so that the movable contact is brought into contact with the fixed contact by the swinging of the movable piece accompanying the sliding displacement of the pressing type operation button. The present invention relates to a detection switch configured.

[0002]

2. Description of the Related Art As a detection switch of this type that has been conventionally used, one having a structure as shown in FIG. 11 is generally known. In FIG. 11, 50 is a case,
It comprises a box-shaped case body 51 that opens in one direction and a cover 52 that closes the opening of the case body 51. 53
Is a push-type operation button, which is slidably supported by the cover 52 of the case 50.

Reference numeral 54 is a lever made of stainless steel or the like, and one end portion 54a thereof is pushed and fixed to the case main body 51 by a projection 52a protruding from the cover 52, and the other end portion 54b is provided with the operation button 53. It is provided in the case main body 51 in an inclined posture so that the end of the operation button is abutted, and the elastic force of the lever 54 urges the operation button 53 to slide to the non-operating position. Reference numeral 55 denotes a movable piece, one end of which is electrically connected to a terminal 56 protruding outward from the case main body 51, the other end of which is in contact with the lever 54, and which is movable near the other end. A contact 57 is formed. Reference numeral 58 denotes a fixed contact fixed to the case main body 51 and electrically connected to another terminal 59, and the movable contact 57 is configured to be in contact with and separated from the fixed contact 58 (openable and closable). .

In the detection switch having the above-mentioned structure, the operation button 53 is pressed against the elasticity of the lever 54 so that the arrow a
By slidably displacing in the direction, the lever 54 is flexibly deformed as shown by an imaginary line. The movable piece 55 is actuated by the flexural deformation of the lever 54, and the movable contact 57 near the end of the lever 54 contacts the fixed contact 58 to close the switch. Further, by releasing the pressing force applied to the operation button 53, the lever 54 and the movable piece 55 are elastically restored as shown by the solid line, and the movable contact 57 is fixed.
8 and the switch is opened.

[0005]

In the conventional detection switch having the above-described structure, the lever 54 is bent and deformed as shown by the phantom line in FIG. 11 when the operation button 53 is pressed, so that the open / close position of the switch is changed. There are variations in
The detection operation is unstable. Further, since the spring stress at the time of opening / closing the switch is large, the life of the lever 54 is particularly short.
Further, there is a problem that it is difficult to wipe the contact portion and contact reliability is poor.

The present invention has been made to solve the above-mentioned problems, and it is possible to stabilize the detection operation and to improve the service life, and moreover, the wiping is easy and the contact reliability is remarkably improved. The main object of the present invention is to provide a detection switch that can do this.

[0007]

In order to achieve the above object, a detection switch according to claim 1 of the present invention is provided with an operation button slidably supported in a case and fixed and arranged in the case. Fixed contact, a movable piece that has a movable contact at the tip end that can be moved in and out of contact with the fixed contact and is swingably mounted in the case, and the operation button is elastically slid to a non-operation position. An elastic movable plate that urges the movable piece so as to bring the movable contact into contact with the fixed contact by sliding displacement of the operation button against the elastic urging force. The movable plate is branched into a plurality of plate pieces in the plate width direction, and one of the plate pieces is brought into contact with the movable piece at an intermediate portion thereof, and its end is a free end, and the other plate piece is The ends are fixed to the case.

In the detection switch having the above structure, it is preferable that the movable contact and the movable piece are integrally formed with a terminal projecting outward from the resin case, and the integrated body is insert-molded in the case.

In the detection switch having the above structure,
The elastic movable plate is formed into three crotch parts that are branched into three plate pieces in the plate width direction, and a middle part of the central plate piece of the elastic movable plate is brought into contact with the movable piece, and It is preferable that the ends are fixed to the case.

Further, in the detection switch having the above-mentioned structure, among the plate pieces of the elastic movable plate, a plate piece of which an intermediate portion comes into contact with the movable piece is another plate piece when the operation button is in the non-operation position. On the other hand, it is desirable to be configured so that it is displaced against elasticity and does not bend until the amount of sliding displacement of the operation button exceeds a certain amount.

Furthermore, a detection switch according to a fifth aspect of the present invention includes an operation button slidably displaced in a case,
The fixed contact fixed / arranged in the case, the movable piece having a movable contact at the tip end that can be moved in and out of contact with the fixed contact and swingably mounted in the case, and the operation button. Elasticity that elastically urges the movable piece to the non-operating position and presses the movable piece so that the movable contact comes into contact with the fixed contact by the sliding displacement of the operation button against the elastic urging force. A movable plate is provided, and an intermediate portion of the elastic movable plate is brought into contact with the movable piece, and its free end is positionally fixed to the case via a spring member.

[0012]

According to the first aspect of the present invention, the movable piece is swung through the elastic movable plate due to the sliding displacement of the operation button due to the pressing of the operation button, and the movable contact at the tip end thereof is fixed. It contacts the contact and closes the switch. At this time, the elastic movable plate is branched into a plurality of plate pieces in the plate width direction, of which the end portion of one plate whose middle portion contacts the movable piece is a free end, and the other plate piece. Since the end of is fixed to the case, the elastic movable plate does not bend before the switch is closed as described above. Therefore, the open / close position of the contact is stabilized, and the spring stress of the elastic movable plate at the time of opening / closing the switch is small, so that the life thereof is improved. In addition, wiping of the movable contact can be easily performed, and the reliability of contact can be improved accordingly.

Further, when the movable contact and the movable piece are integrally formed with the terminal and the integral body is insert-molded into the case, the contact point between the terminals is only one, so that the contact reliability is further improved. At the same time as improving, it is easy to reduce the manufacturing cost.

Further, when the elastic movable plate is formed into three crotch-shapes and the middle part of the plate piece is brought into contact with the movable piece, the elastic movable plate when the switch is opened and closed is described above. The operation can be performed more stably, and particularly, when the operation button is in the non-operation position, the plate piece that comes into contact with the movable piece is displaced against the elasticity of other plate pieces. In the case where the operation button does not bend until the amount of sliding displacement of the operation button becomes a certain amount or more, the function of preventing variation in the switch open / close position due to the bending of the elastic movable plate is further improved.

Further, according to claim 5 of the present invention, the elastic movable plate does not bend until the switch is closed, and the stress acting on the elastic movable plate during that time is absorbed by the spring member. Therefore, the stress of the elastic movable plate itself can be reduced and the life can be improved.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. Example 1. FIG. 1 shows a first embodiment of the present invention. 2 is an exploded perspective view showing the structure of the detection switch, FIG. 2 is a vertical sectional side view thereof, and FIG. 3 is a vertical sectional view taken along the line AA of FIG. 2. In FIG. 1, 1 is a case made of synthetic resin. , This case 1
Is composed of a box-shaped case body 2 that opens in one direction and a cover 3 that closes the opening of the case body 2. The case 3 is formed in holes 3b and 3b formed in both side plate portions 3a and 3a of the cover 3. By engaging the engaging projections 2b, 2b which are integrally projected from both side plate portions 2a, 2a of the main body 2, both
2 is fixed to form a closed case 1.

Reference numeral 4 denotes an operation button, which is slidably supported in a hole 5 formed in the cover 3 constituting the case 1. A fixed contact 6 is formed integrally with the terminal 7. Reference numeral 8 denotes a movable piece, which has a substantially inverted V shape in a side view, and has a movable contact 9 which can be brought into and out of contact with the fixed contact 6 at the tip thereof and is integrally formed with the terminal 10. The fixed contact 6 and the terminal 7 are integrally formed and the movable piece 8 with the movable contact 9 and the terminal 10 are integrally formed at predetermined positions on the bottom wall of the case body 2.

Immediately after the integrated piece of the movable piece 8 with the movable contact 9 and the terminal 10 is insert-molded on the bottom wall of the case body 2, as shown in FIG. Since 8 is in a standing posture substantially along the side plate portion 2a of the case body 2, after the insert molding, the movable piece 8 is bent to the bottom wall side of the case body 2 as shown in FIG. 4B. , Which is adjusted to have a predetermined shape, and is swingably disposed in the case 1 with the end portion on the side of connection with the terminal 10 as a fulcrum.

Reference numeral 11 denotes an elastic movable plate, which is formed into three crotch-shaped parts which are branched into three plate pieces 11A, 11B, 11C in the plate width direction, and these plate pieces 11A, 11B, 11C are formed.
By locking the wide plate portion 11D at one end, which is continuously provided, to the end portion of the operation button 4, the operation button 4 is elastically slidably biased to the non-operation position, that is, the free position.

Of the three plate pieces 11A, 11B and 11C, the middle portion of the central plate piece 11B in the longitudinal direction is brought into contact with the top of the movable piece 8 and the end portion 11b bent into a substantially V shape. Is a free end and its free end 1
1b is supported by abutting on a flat support portion 12B formed on the inner surface of one side plate portion 2a of the case body 2. In addition, the end portions 11a and 11c of the plate pieces 11A and 11C on both sides are bent in an inverted shape, and the bent end portions 11a and 11c are bent.
a and 11c are placed on the inclined support surfaces 12A and 12C formed on both sides of the flat support portion 12B, and the pushing projections 13A integrally projected from the cover 3 are provided.
It is pressed against the inclined support surfaces 12A and 12C by 13C and fixed in position.

As described above, the free end portion 1 of the central plate piece 11B in the elastic movable plate 11 formed in the three-forked shape.
1b is abutted and supported on the flat support portion 12B, while the bent end portions 11a and 11c of the plate pieces 11A and 11C on both sides thereof are placed and fixed on the inclined support surfaces 12A and 12C, respectively. When 4 is in the non-operating position, the central plate piece 11B is displaced so as to be pushed up slightly against the cover 3 side against the plate pieces 11A and 11C on both sides, and thereby the spring load. Is provided and the sliding displacement amount (stroke) of the operation button 4 does not bend until it becomes a certain amount or more.

Next, the operation of the detection switch having the above configuration will be described. In a normal state where the pressing force is not applied to the operation button 4, the plate pieces 1 on both sides of the elastic movable plate 11 are
The elastic force of 1A and 11C causes the operation button 4 to move to the position shown in FIG.
As shown in (A), the movable contact 8 of the movable piece 8 is separated from the fixed contact 6 by being biased to the free position by sliding, and the switch is held in the open state (OFF state).

From this state, when the operation button 4 is pressed in the direction of arrow x against the elasticity and slidably displaced inward of the case 1, as shown in FIG. 5B, the elastic movable plate 11 is moved. The plate piece 11B at the center in FIG. 6 does not bend and swings in the direction of the arrow y with the free end 11b side as a fulcrum, as in the case of using a rigid lever. As a result, the movable piece swings by an amount commensurate with the sliding amount of the operation button 4,
The movable contact 9 at the tip is brought into contact with the fixed contact 6 to operate the switch in the closed state (on state).

Further, when the operation button 4 is continuously pressed in the arrow x direction from the closed state of the switch to increase the sliding displacement amount and reach the operation limit position of the switch, as shown in FIG. The central plate piece 1 of the elastic movable plate 11
1B moves to the cover 3 side and maintains the switch closed state. Then, at this time, the movable contact 9 is wiped in the direction of the arrow z while being in contact with the fixed contact 6.

As described above, the switch can be stably opened and closed at a predetermined position without bending the elastic movable plate 11, and the spring stress is small, so that the life of the switch can be improved. Further, since the structure is such that wiping can be easily performed, the contact reliability of the contacts 6 and 8 can be improved.

Example 2. 6 and 7 show a second embodiment of the present invention. 3A and 3B are a vertical side view and a vertical cross-sectional view taken along the line BB showing the configuration of the detection switch according to Example 1. Is different from each of the plate pieces 11A, 11 in the elastic movable plate 11 formed in a three-forked shape.
Without bending or bending the tips of B and 11C, as shown in FIG.
The end portion of is supported by abutting against the flat support portion 12B,
The end portions of the plate pieces 11A and 11C on both sides are connected to the inclined support surface 12A,
12C is a point of being mounted and fixed on 12C, and other configurations are the same as those in the first embodiment. Since it is almost the same as the above, the same reference numerals are given to the corresponding portions, and the detailed description thereof will be omitted. In addition, in the above-mentioned Example 2. The operation and the effect of the detection switch having the above-mentioned configuration are also the same as those in the first embodiment. Since it is almost the same as the one described above, the description thereof will be omitted.

Example 3. FIG. 9 shows a third embodiment of the present invention.
2A is a vertical sectional side view showing the configuration of a detection switch according to FIG. 1, in which FIG. 1A shows a switch open state and FIG. 1B shows a switch closed state. In this embodiment, the elastic movable plate 11 is used. Is made of a single plate material, and its free end 11
b is abutted and supported on the flat support portion 12B, and the free end portion 11b is integrally integrated with the elastic movable plate 11 and bent in a dogleg shape in a side view.
It is pressed against the flat support portion 12B through the position 4 and fixedly fixed to the case body 2. Further, a substantially semicircular engaged portion 11c is formed in the middle of the elastic movable plate 11, and an inverted U-shaped engaging portion 8a bent from the movable piece 8 side is engaged with the engaged portion 11c. The elastic movable plate 11 is configured so that the movement of the elastic movable plate 11 is reliably transmitted to the movable piece 8 via the engaging portion. It should be noted that, in this embodiment, other configurations are the same as those in the first embodiment. Since they are the same, the same reference numerals are given to corresponding portions and detailed description thereof is omitted.

Example 4. 10 shows a fourth embodiment of the present invention. FIG. 3 is a vertical cross-sectional side view showing the configuration of the detection switch according to FIG. 1, in which FIG.
Indicates a switch closed state, and in this embodiment, in the above-mentioned Embodiment 3. A coil spring is used as the spring member 14 shown in FIG. Since they are exactly the same as the above, the same parts are denoted by the same reference numerals and detailed description thereof is omitted.

By the way, in the above third embodiment. And Example 4. According to the detection switch having the configuration shown in FIG. 3, the elastic movable plate 11 does not bend until the switch is closed, and the stress acting on the elastic movable plate 11 is absorbed by the spring member 14 during that time. Therefore, the spring stress acting on the elastic movable plate 11 itself can be reduced, and the life of the elastic movable plate 11 can be further improved.

In each of the above embodiments, the movable piece 8 including the movable contact 9 is integrally formed with the terminal 10, and the case body 2 is insert-molded.
In this case, since the contact point between the terminals 10 and 7 is only one point by the contact points 9 and 6, there is an advantage that a switch having excellent contact reliability can be obtained at low cost. The movable piece 8 and the terminal 10 may be configured separately.

Further, in each of the above-mentioned first embodiment. And Example 2.
In the above description, three elastic movable plates 11 are formed in a crotch shape, but the elastic movable plate 11 is formed in a crotch shape, one plate piece of which serves as a free end and the other plate piece is fixed in position. It may be of the form

[0032]

As described above, according to the first aspect of the present invention, the sliding displacement of the operation button causes the movable contact to come into contact with the fixed contact through the elastic movable plate and the movable piece to close the switch. Since the elastic movable plate can be operated without bending when it is formed, the opening and closing position of the contact can be stabilized, and the spring stress of the elastic movable plate at the time of opening and closing the switch can be reduced to shorten its life. Can be improved. Further, since the movable contact can be easily wiped, the contact reliability can be improved.

In particular, when the movable contact and the movable piece are integrally formed with the terminal as in claim 2 and the integrated body is insert-molded in the case, the number of contact points between the terminals is only one. Therefore, it is possible to further improve the contact reliability, and at the same time, it is easy to reduce the manufacturing cost.

Further, when the elastic movable plate is formed into three crotch shapes and the middle part of the plate piece is brought into contact with the movable piece, the elastic movable plate when the switch is opened and closed is The operation can be performed more stably, and particularly, when the operation button is in the non-operation position, the plate piece that comes into contact with the movable piece is displaced against the elasticity of other plate pieces. In the case where the operation button does not bend until the amount of sliding displacement of the operation button becomes equal to or greater than a certain value, it is possible to further improve the function of preventing the variation of the switch opening / closing position due to the bending of the elastic movable plate.

Further, according to claim 5 of the present invention, the elastic movable plate does not bend until the switch is closed, and the stress acting on the elastic movable plate during that time is absorbed by the spring member. Therefore, the stress of the elastic movable plate itself can be further reduced and the life can be remarkably improved.

[Brief description of drawings]

FIG. 1 is a first embodiment of the present invention. 3 is an exploded perspective view showing the configuration of a detection switch according to FIG.

2 is a vertical side view of FIG.

3 is a cross-sectional view taken along the line AA of FIG.

FIG. 4 is a vertical cross-sectional side view illustrating insert molding of a movable piece and a terminal that are integrally formed and subsequent processing.

FIG. 5 is a vertical sectional side view illustrating a switch operation.

FIG. 6 is a second embodiment of the present invention. 4 is a vertical cross-sectional side view showing the configuration of the detection switch according to FIG.

7 is a cross-sectional view taken along the line BB of FIG.

FIG. 8: Example 2. 3 is a perspective view of an elastic movable plate used in FIG.

FIG. 9 is a third embodiment of the present invention. 4 is a vertical cross-sectional side view showing the configuration of the detection switch according to FIG.

FIG. 10 is a fourth embodiment of the present invention. 4 is a vertical cross-sectional side view showing the configuration of the detection switch according to FIG.

FIG. 11 is a vertical cross-sectional side view showing the configuration of a conventional detection switch.

[Explanation of symbols]

 1 Case 4 Operation Button 6 Fixed Contact 7, 10 Terminal 8 Moving Piece 9 Moving Contact 11 Elastic Moving Plate 11A, 11B, 11C Plate Piece 11a, 11c Bending End 11b Free End 14 Spring Member

Front page continuation (72) Inventor Yuji Kondo 10 Ouron Co., Ltd.

Claims (5)

[Claims] 1. An operating button slidably supported by a case, a fixed contact fixed and arranged in the case, and a movable contact at a tip end which can be brought into contact with and separated from the fixed contact. A movable piece swingably mounted in the case,
The operation button is elastically urged to the non-operation position, and the movable piece is pressed so as to bring the movable contact into contact with the fixed contact by the sliding displacement of the operation button against the elastic urging force. An elastic movable plate for swinging, the elastic movable plate is branched into a plurality of plate pieces in the plate width direction, and an intermediate part of one of the plate pieces is brought into contact with the movable piece, and an end portion thereof is provided. Is a free end, and the ends of the other plate pieces are positionally fixed to the case. 2. The movable contact and the movable piece are integrally formed with a terminal projecting outward from a resin case,
The detection switch according to claim 1, wherein the integrated body is insert-molded in the case. 3. The elastic movable plate is formed in a three-forked shape branched into three plate pieces in the plate width direction, and a middle part of the central plate piece of the elastic movable plate is in contact with the movable piece. The detection switch according to claim 1, wherein the ends of the plate pieces on both sides are positionally fixed to the case. 4. A plate piece of the elastic movable plate, of which a middle portion contacts the movable piece, resists elasticity against other plate pieces when the operation button is in a non-operating position. 3. The detection switch according to claim 1, wherein the detection switch is configured so as not to bend until the amount of sliding displacement of the operation button exceeds a certain amount. 5. An operation button slidably displaced in a case, a fixed contact fixed and arranged in the case, and a movable contact at a tip end of the fixed contact. A movable piece swingably mounted in the case,
The operation button is elastically urged to the non-operation position, and the movable piece is pressed so as to bring the movable contact into contact with the fixed contact by the sliding displacement of the operation button against the elastic urging force. A detection switch, comprising: an elastic movable plate to be swung, wherein an intermediate part of the elastic movable plate is brought into contact with the movable piece, and its free end is positionally fixed to a case via a spring member.