JPH11238427A - Seesaw switch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seesaw switch which can suppress exhaustion of contacts by enlarging the contacting pressure when a movable contact is brought into contact with a stationary contact. SOLUTION: A seesaw switch is equipped with a body 1, a seesaw piece 3 in which a movable contact 31 to come in contact with and separates from a stationary contact 13a is installed at one end and approx. the central part is supported by a supporting part 21a furnished on the body 1 to perform the seesaw motions, a plunger 4 furnished with a slide 5 which makes sliding in pressing the seesaw piece 3 when an operation part is manipulated, wherein the seesaw piece 3 is put in motions when the slide 5 goes toward the movable contact 31 beyond the supporting part 21a to cause the movable contact 31 to make contact with the stationary contact 13a, and the seesaw piece 3 is furnished with an abutting piece 32 to bring the movable contact 31 into contact with the stationary contact 13a under a specified contact pressure α when the slide 5 has reached the specified position ion between the supporting part 21a and stationary contact 13a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seesaw-operated switch that is connected to an electric device and controls on / off of energization of the electric device.

[0002]

2. Description of the Related Art Conventionally, as this kind of seesaw operation type switch, there is one having a configuration shown in FIG. In this device, a body A provided with a fixed contact A1 and a movable contact B1 contacting / separating from the fixed contact A1 are provided at one end, and a substantially central portion is supported by a supporting portion A2 provided on the body A to perform a seesaw operation. And a plunger C provided with a slider C2 that slides while pressing the seesaw piece B when the operation unit C1 is operated. More specifically, the seesaw piece B is provided with a protruding piece B1 protruding from the other end, and the slider C2 is provided.
Is housed in a bottomed hole provided in the plunger C, and is similarly pressed against the pressing spring C3 housed in the bottomed hole.

The operation of this device will be described with reference to FIGS. As shown in FIGS. 10 and 11, when the operating portion C1 of the plunger C is operated and pushed into the body A, the slider C2 slides while pressing the seesaw piece B. Then, as shown in FIG. 12 and FIG.
When 2 moves beyond the supporting portion A2 toward the movable contact B1, the seesaw piece B is instantaneously rotated in the counterclockwise direction to move the movable contact B1.
Contacts the fixed contact A1. At this time, when the slider C2 is located near the support A2 on the movable contact B1 side, the pressing force from the slider C2 is applied to the support A2, so that the movable contact B1 reduces the contact pressure to approximately zero. In this state, the fixed contact A1 is contacted and turned on.

Next, when the operating part C1 is opened, the plunger C is moved in the opposite direction to the operating direction by the return spring C4 provided on the operating part C1, and the slider C2 moves over the supporting part A2. The movable contact B1 slides toward the other end and rotates the seesaw piece B clockwise, so that the movable contact B1 is separated from the fixed contact A1 and turned off.

[0005] However, in this case, the projecting piece B1 of the seesaw piece B does not come into contact with the plunger C in the above-described series of processes.

[0006]

In the above-described conventional seesaw operation type switch, the slider C2 rotates the seesaw piece B counterclockwise or clockwise to move the movable contact B1 from the fixed contact A1. By connecting and disconnecting, the load current can be opened and closed.

However, the movable contact B1 is fixed to the fixed contact A1.
When the contact is turned on, the contact pressure is substantially zero, so that the bounce time becomes longer, the arc time during which the arc continues becomes longer, and there has been a problem that both contacts are heavily consumed.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to increase the contact pressure when a movable contact comes into contact with a fixed contact, thereby suppressing contact wear. To provide a switch.

[0009]

Means for Solving the Problems In order to solve the above-mentioned problems, according to the first aspect of the present invention, a body and a movable contact that comes into contact with and separate from a fixed contact are provided at one end and provided on the body. A seesaw piece that is operated by a seesaw while being supported by the support portion, and a plunger provided with a slider that slides while pressing the seesaw piece, and when the slider exceeds the support portion to the movable contact side, the seesaw piece is moved. In a seesaw operation type switch in which a movable contact contacts a fixed contact by performing a seesaw operation, when the slider is located at a predetermined position between the support portion and the fixed contact, the movable contact is set to a predetermined contact pressure. A contact control means for having a contact with the fixed contact is provided on the seesaw piece.

According to a second aspect of the present invention, in the first aspect, the first contact control means is formed in a substantially L-shape from the other end of the first seesaw piece to contact the first plunger. It has a configuration formed with one piece.

According to a third aspect of the present invention, in the second aspect, the first contact piece is formed so as to contact the first plunger when the first slider exceeds the first support portion. is there.

According to a fourth aspect of the present invention, in any one of the first to third aspects, a common terminal formed in a long plate shape and electrically connected to the seesaw piece is led out of the body. Wherein the supporting portion is formed with a width side wall at a base end of the common terminal.

According to a fifth aspect of the present invention, in the fourth aspect, the width side wall of the common terminal is formed substantially linearly.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS.

Reference numeral 1 denotes a body, which is formed of a synthetic resin insulating material into a substantially bottomed box shape having a bottom portion 11 and one side wall 1a, and a box-shaped inner portion 12 opened to the side opposite to the bottom portion 11 side.
And an insertion hole in the bottom 11. And a fixed contact terminal 13 to which a fixed contact 13a made of a silver alloy is fixed.
Is inserted through the insertion hole and is drawn out from the bottom 11,
It is fixed to its bottom 11.

Reference numeral 2 denotes a common terminal, which is formed in a long plate shape from a copper alloy and has a base end portion 21 and a tip end portion having width side walls, and the width side walls are formed in a substantially straight line, which will be described later. A support portion 21a for supporting the seesaw piece 3 is formed. Then, the distal end side is inserted into the insertion hole and the bottom 11 of the body 1 is inserted.
And is fixed to the bottom 11 thereof.

Reference numeral 3 denotes a seesaw piece, which is formed in a long plate shape from a copper alloy, has a movable contact 31 made of a silver alloy at one end, and has a support 21a of the common terminal 2 substantially at the center, that is, a base end The movable contact 31 is supported by the width side wall of the portion 21 and performs a seesaw operation in the box-shaped interior 12 of the body 1, and the movable contact 31 comes into contact with and separates from the fixed contact 13 a.

Here, it is extended from the other end and has an obtuse angle of approximately L.
The contact piece 32 bent in the shape of a letter is attached to the bottom 1 of the body 1.
1 projecting toward the opposite side to form contact control means.

Reference numeral 4 denotes a plunger formed of a synthetic resin insulating material into a substantially square rod shape having a base end and a tip.
An operation section 41 having a rectangular cross section and a cutout section are provided at the base end. Further, a bottomed hole 42 having a circular cross section is provided at the distal end in a direction orthogonal to the longitudinal direction, and a contact wall 43 adjacent to the bottomed hole 42 is provided.

By engaging the notch with one side wall 1a of the body 1, the operating portion 41 is led out of the body 1, and the bottomed hole 42 is located in the box-shaped interior 12 of the body 1.
When the operation unit 41 is operated, the operation unit 41 is pushed into the body 1, and when the operation is released, the operation unit 41 is returned to the original state by the return spring 44 provided between the body 1 and the one side wall 1 a.

Reference numeral 5 denotes a slider, which is formed of a synthetic resin insulating material and has a circular rod shape in cross section.
2, the base end thereof abuts against the pressing spring 51 similarly accommodated in the bottomed hole 42, and the spherically formed distal end abuts on the seesaw piece 3. When the operation unit 41 is operated, the seesaw piece 3 slides while being pressed. The case 6 is covered by the metal plate and covers the opening of the body 1.

The operation of this embodiment will be described with reference to FIGS. As shown in FIGS. 3 and 4, when the operating section 41 is operated and the plunger 4 is pushed into the body 1, the slider 5 slides toward the movable contact 31 while pressing the seesaw piece 3.

Then, as shown in FIGS. 5 and 6, when the slider 5 moves by δ1 and is located near the support 21a on the movable contact 31 side beyond the support 21a, the seesaw piece 3 is moved. Operate the seesaw counterclockwise. At this time, the contact piece 32 provided at the other end of the seesaw piece 3
Comes into contact with the contact wall 43 of the plunger 4 and the movable contact 31
Is provided with a gap between the fixed contact 13a and the fixed contact 13a and does not contact the fixed contact 13a. Further, when the slider 5 exceeds the support portion 21a, the contact piece 32 changes from the non-contact state to the contact wall 43 of the plunger 4 from the non-contact state to the contact wall 43. Lighten the operating load until the pressure exceeds.

Next, as shown in FIGS. 1 and 2, the slider 5 moves by δ2 and slides further toward the movable contact 31 side.
When the movable contact 31 is located at a predetermined position between the support portion 21a and the fixed contact 13a, the movable contact 31 contacts the fixed contact 13a with a predetermined contact pressure α and turns on.

At this time, the slider 5 is located between the support 21a and the fixed contact 13a. Therefore, as shown in FIG. 7 showing the correlation between the moving distance of the operation unit 41 and the contact pressure, the predetermined contact pressure α is zero at the time of the ON, unlike the conventional case where it is zero, from the predetermined position to the support unit 21a and the predetermined position. The load is applied from the movable contact 31 to the fixed contact 13a in accordance with the distance from the movable contact 31 to the fixed contact 13a. further,
When the slider 5 is located at a predetermined position regardless of the shape of the support portion 21a, the movable contact 31 reliably contacts the fixed contact 13a.

Next, when the operating portion 41 is opened, the plunger 4 is moved in the direction opposite to the operating direction by the return spring 44 provided at the base end portion 21 of the plunger 4, and the slider 5 is supported. Slide to the operation unit 41 side beyond 21a,
By moving the seesaw piece 3 clockwise, the movable contact 31 is separated from the fixed contact 13a and turned off.

In the seesaw operation type switch of this embodiment, as described above, the contact control means is provided on the seesaw piece 3, and the slider 5 is provided between the support portion 21a and the fixed contact 13a. When located at a predetermined position, the movable contact 3
1 has a predetermined contact pressure α and contacts the fixed contact 13a, so that unlike the conventional case where the predetermined contact pressure α is zero,
It is secured based on the respective distances from the predetermined position to the support portion 21a and from the predetermined position to the fixed contact 13a, the bounce time of the movable contact 31 is shortened, the arc is reduced, and the fixed contact 13a and the movable contact 31 are consumed. Can be reduced, and the life can be prolonged.

Further, since the contact control means is formed in a substantially L-shape from the other end of the seesaw piece 3 and is formed by the contact piece 32 which comes into contact with the plunger 4, the contact piece 32 is When the slider 5 is in contact with the support portion 21a,
And the fixed contact 13a, the movable contact 31 comes into contact with the fixed contact 13a.
Can be loaded from the movable contact 31 to the fixed contact 13a with a simple configuration.

When the slider 5 moves beyond the support 21a to the movable contact 31 side, the contact piece 32 comes into contact with the plunger 4, so that the plunger 4 is operated and the slider 5 is moved to the support 21a.
a, the contact piece 32 changes from the non-contact state to the plunger 4 to the contact state.
Can be lightened until the load exceeds.

Further, since the support portion 21a is formed with the width side wall at the base end portion 21 of the common terminal 2, the cost can be reduced by using the support portion 21a and the common terminal 2 together.

Further, since the width side wall of the common terminal 2 is formed substantially linearly, the seesaw piece 3 is supported by the linear width side wall, and the contact resistance between the common terminal 2 and the seesaw piece 3 and the width side wall Wear can be reduced.

In this embodiment, the contact piece 32 is formed so as to contact the contact wall 43 of the plunger 4 when the slider 5 exceeds the support portion 21a. 2
When it is not necessary to reduce the operation load until the slider 5 exceeds 1a, the contact piece 32 may be brought into contact with the contact wall 43 in a state before the slider 5 passes over the support portion 21a, and there is no limitation.

In this embodiment, the contact control means for bringing the movable contact 31 into contact with the fixed contact 13a at a predetermined contact pressure α is formed by the contact piece 32 contacting the contact wall 43 of the plunger 4. However, the contact control means may be formed by other means and is not limited.

Although the support portion 21a is formed by the width side wall of the cutout groove provided in the base end portion 21 of the common terminal 2, a separate support portion 21a may be provided in the body 1.
Not limited.

[0035]

According to the first aspect of the present invention, when the contact control means is provided on the seesaw piece and the slider is located at a predetermined position between the support portion and the fixed contact, the movable contact is provided with a predetermined contact pressure. In contrast to the conventional case where the predetermined contact pressure is zero, the movable contact is secured based on the respective distances from the predetermined position to the support portion and from the predetermined position to the fixed contact. The bounce time is shortened, the arc is reduced, the consumption of the fixed contact and the movable contact can be reduced, and the life can be prolonged.

According to a second aspect of the present invention, in addition to the effect of the first aspect, the contact control means is formed in a substantially L-shape from the other end of the seesaw piece and comes into contact with the plunger. Since the slider is located at a predetermined position between the support portion and the fixed contact with the contact piece abutting on the plunger, and the movable contact comes into contact with the fixed contact, the predetermined contact pressure Can be loaded from the movable contact to the fixed contact with a simple configuration.

According to the third aspect, in addition to the effect of the second aspect, the contact piece comes into contact with the plunger when the slider moves beyond the supporting portion toward the movable contact, so that the plunger is operated. When the slider moves beyond the support, the contact piece changes from a non-contact state to a contact state with the plunger, so that the operation load until the slider moves beyond the support can be reduced.

According to a fourth aspect, in addition to the effects of any one of the first to third aspects, a common terminal whose base end is electrically connected to the seesaw piece is led out of the body. Then, since the supporting portion is formed with the width side wall at the base end of the common terminal, the cost can be reduced by using the supporting portion and the common terminal together.

According to the fifth aspect, in addition to the effect of the fourth aspect, since the width side wall of the common terminal is formed substantially linear, the seesaw piece is supported by the linear width side wall, and The contact resistance between the terminal and the seesaw piece and the wear on the width side wall can be reduced.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view showing a slider according to an embodiment of the present invention when located at a predetermined position between a support portion and a fixed contact.

FIG. 2 is a conceptual diagram when the same slider is located at a predetermined position between a support portion and a fixed contact.

FIG. 3 is a partial cross-sectional view when the same slider is located on a side opposite to a fixed contact with respect to a support portion.

FIG. 4 is a conceptual diagram when the slider is located on the opposite side of a fixed contact with respect to a support.

FIG. 5 is a partial cross-sectional view when the same slider is located near the support on the movable contact side beyond the support.

FIG. 6 is a conceptual diagram when the above slider is located near the support on the movable contact side beyond the support.

FIG. 7 is a correlation diagram showing a relationship between a moving distance of the operation unit and a contact pressure.

FIG. 8 is a perspective view of the same.

FIG. 9 is a sectional view showing a conventional example.

FIG. 10 is a partial cross-sectional view when the same slider is located on the opposite side of the fixed contact with respect to the support.

FIG. 11 is a conceptual diagram when the above slider is located on the opposite side of the fixed contact with respect to the support.

FIG. 12 is a partial cross-sectional view when the same slider is located near the support on the movable contact side beyond the support.

FIG. 13 is a conceptual diagram when the above-mentioned slider is located near the support on the movable contact side beyond the support.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Body 13a Fixed contact 2 Common terminal 21 Base end 21a Support part (width side wall) 3 Seesaw piece 31 Movable contact 32 Contact piece (contact control means) α Predetermined contact pressure 4 Plunger 5 Slider

Claims (5)

[Claims] 1. A seesaw piece which has a body, a movable contact which comes into contact with and separates from a fixed contact at one end, and which is supported by a support portion provided on the body to perform a seesaw operation, and slides while pressing the seesaw piece. A plunger provided with a sliding member which moves the seesaw piece to the movable contact side and moves the seesaw piece into a seesaw operation when the movable contact contacts the fixed contact. When the moving element is located at a predetermined position between the support portion and the fixed contact, contact control means for bringing the movable contact into contact with the fixed contact with a predetermined contact pressure is provided on the seesaw piece. Seesaw operation type switch characterized by the following. 2. The contact control means according to claim 1, wherein said contact control means is formed of a contact piece which is bent substantially in an L shape from the other end of said seesaw piece and abuts on said plunger. Seesaw-operated switch as described. 3. The seesaw operation type switch according to claim 2, wherein the first contact piece is formed so as to come into contact with the first plunger when the first slider exceeds the first support portion. 4. A common terminal formed in a long plate shape and electrically connected to the seesaw piece is led out of the body, and the support portion is a width side wall at a base end of the common terminal. The seesaw-operated switch according to any one of claims 1 to 3, wherein the switch is formed with the switch. 5. The seesaw operation type switch according to claim 4, wherein a width side wall of said common terminal is formed substantially in a straight line.