JPH066430Y2 - Push button switch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Industrial Application Field" The present invention relates to improvement of push button switches used in various electronic devices and the like.

“Prior Art” FIG. 9 shows a conventional push button switch. Reference numeral 1 in the figure shows a switch main body formed of an insulating material in a box shape. At the center of the bottom surface of the switch body 1, a common contact 2 and two fixed contacts 3 and 4 are symmetrically arranged so as to sandwich the common contact 2. The common contact 2 and the fixed contacts 3 and 4 are led out from the bottom surface of the switch body 1 as a common terminal 2A and terminals 3A and 4A.

The central portion of the movable contact piece 5 contacts the common contact 2, and the movable contact piece 5 performs a seesaw motion with the common contact 2 as a fulcrum. For this purpose, the movable contact piece 5 is supported by the movable contact piece holder 6.
The movable contact piece holder 6 is made of an insulating material and has a groove 6A on the bottom surface as shown in FIG. 10, and the movable contact piece 5 is housed in this groove 6A. The movable contact piece 5 has a protrusion 5A projecting outward at the central portion, and the protrusion 5A is attached to the movable contact piece holder 6
The movable contact piece 5 is structured so as not to be displaced from the fulcrum position of the seesaw movement by engaging with the concave groove 6B provided in the.

On the other hand, a semi-cylindrical shaft 6C is formed on the outside of the movable contact piece holder 6, and the shaft 6C is inserted into a groove 1C formed between two ridges 1A and 1B formed on the inner wall surface of the switch body 1. ,
The fulcrum position of the movable contact piece holder 6 is held.

The movable contact piece holder 6 has a concave groove 6D on the upper surface side, and the pressing tool 7 engages with the concave groove 6D. The pusher 7 is supported by the converter 8.

The converter 8 has a shaft 8A protruding on both sides, and the shaft 8A is rotatably supported by engaging with a groove 1D formed in the upper edge of the switch body 1. Further, a mountain-shaped protrusion 8B is provided on the upper part of the converter 8, and the inclined surface 8 formed by the protrusion 8B.
C and 8D form mutually inclined surfaces. Engagement portions 8E and 8F are formed at the respective lower ends of the reverse inclined surface, and the tip of the operation pin engages with the engagement portions 8E and 8F to perform the diversion operation of the diverter 8.

A sliding guide portion 8G is provided downward on the diverter 8,
The pushing tool 7 is inserted into the sliding guide portion 8G. Push 7
Is elastically biased downward by the spring 11. The movable contact piece holder 6 presses the free end of the movable contact piece 5 against the fixed contact 3 or 4 by the biasing force of the pusher 7.

A lid 10 covers the upper part of the switch body 1. This lid 1
A hole is formed in the center of 0, and the cylindrical body 12 is mounted in this hole. An operating rod 13 is attached to the cylindrical body 12 so as to be vertically movable. The operation rod 13 has a hole 1 extending from the lower end along the axis.
3A is formed, and the operation pin 9 is housed in this hole 13A. The operation pin 9 has a flange 9A on the upper end side, and the spring receiver 14 mounted on the flange 9A and the lower end side of the tubular body 12.
A spring 15 is mounted between the control pin 13 and the spring, and the spring 15 biases the operation rod 13 upward and elastically supports the operation pin 9. With this structure, the tip of the operation pin 9 can be swung in any direction. A push button 16 is attached to the upper end of the operation rod 13.

With such a structure, every time the push button 16 is pressed, the tip of the operation pin 9 causes the tip end of the operating pin 9 to alternately press the engaging portions 8E and 8F so that the tip of the switching element 8 is alternately turned in the opposite direction. Convertor 8
When the movable contact piece holder 6 pushes the pusher 7
Moves so that the movable contact piece 5 switches from a state in which the movable contact piece 5 is in contact with the contact 3 to a state in which the movable contact piece 5 is in contact with the contact 4.
Further, the reverse switching operation is performed.

[Problems to be Solved by the Invention] According to the above-described conventional push button switch, when the switching element 8 performs the switching operation, the tip of the pressing tool 7 slides inside the concave groove 6D formed in the movable contact piece holder 6. To do. Therefore, the force for pressing the push button 16 is a value obtained by adding the work amount required for the sliding friction between the pressing tool 7 and the movable contact piece holder 6 to the work for switching the movable contact piece 5 and the movable contact piece holder 6.

Therefore, the force for converting the conversion element 8 becomes relatively large. Further, since the pusher 7 engages with the concave groove 6D and slides, there is a drawback that the feel of switching operation is poor.

"Means for Solving Problems" In this invention, the pusher and the movable contact piece holder are axially coupled to each other.

That is, a bearing portion is provided above the movable contact piece holder, and the pusher is axially coupled to this bearing portion.

When the converter is converted by this shaft coupling, the pusher pivotally operates the movable contact piece holder by the shaft coupling to perform a seesaw motion.

As a result, since there is no sliding contact portion between the push button and the movable contact piece holder, the frictional resistance is reduced. Therefore, it is possible to provide a push button switch that can be switched with a light operating force.

Further, since there is no sliding contact portion, there is an advantage that the feeling of operation is improved.

[Embodiment] FIG. 1 shows an embodiment of the push button switch according to the present invention.
In FIG. 1, reference numeral 101 denotes a switch body formed of an insulating material in a box shape. A common contact 102 and fixed contacts 103 and 104 are planted on the bottom surface of the switch body 101. The common contact 102 and the fixed contacts 103 and 104 are the common terminal 102A and the fixed terminal 1 from the bottom surface of the switch body 101.
It is led out as 03A and 104A.

The center of the movable contact piece 105 contacts the common contact 102,
The movable contact piece 105 makes a seesaw movement with the common contact 102 as a fulcrum. The movable contact piece 105 is held by the movable contact piece holder 106 to perform a seesaw motion.

The movable contact piece holder 106 has a concave groove 106A on the lower side as shown in FIG. 2, and the movable contact piece 105 is press-fitted and held in the concave groove 106A. The movable contact piece holder 106 has a semi-columnar shaft 106C on both side surfaces, and the shaft 106C is inserted into a concave groove 101C formed by the protrusions 101A and 101B provided on the inner wall surface of the switch body 101. 101C and axis
The movable contact piece 105 is supported so as to perform a seesaw movement around the position of the common contact 102 by engagement with 106C. The structure up to this point is the same as that of the conventional push button switch shown in FIG.

In this invention, a bearing portion 106D is provided on the upper side of the movable contact piece holder 106, and the push rod 107 is axially coupled to the bearing portion 106D. The bearing 106D is a movable contact piece holder 106.
Two protruding walls 106E are formed on the upper side of, and a recess is formed in this protruding wall 106E, and this recess is used as a bearing portion 106D. A hole 106F is formed while being sandwiched by the projecting wall 106E,
The protrusion 107C of the push rod 107 is inserted into the hole 106F to act as a stopper of the converter 108.

The converter 108 has shaft ends 108B at both ends of the shaft 108A as shown in FIG.
Is projected. As shown in FIG. 4, the flat protrusion 108C is provided with a sliding guide portion 108D formed by a flat square hole. The push rod 107 is slidably accommodated in the sliding guide portion 108D. A circular hole 108 is formed in the center of the sliding guide portion 108D.
Form E. The circular hole 108E is a circular hole for accommodating a spring 111 for giving a biasing force to the push rod 107.

A protrusion 108F is formed on the shaft 108A in a direction orthogonal to the axis of the shaft 108A and also orthogonal to the flat protrusion 108C. In this example, the case where two projecting pieces are formed in opposite directions is shown.

FIG. 5 shows the push rod 107. The push rod 107 includes two legs 107A and 107B bent in a U-shape, and a protrusion 107 in the opposite direction from the center of the member connecting the legs 107A and 107B.
Has C. The lower ends of the legs 107A and 107B are cylindrical surfaces 10
7D, and the movable contact piece holder 10 with this cylindrical surface 107D.
The bearing portion 106D formed in No. 6 is engaged. The leg 10
Protrusion 107E at the center of the connecting member sandwiched by 7A and 107B
Is formed, and one end of the spring 111 is engaged with this protrusion 107E to stably support the end portion of the spring 111.

The shaft end 108B of the converter 108 is inserted into the U-shaped groove formed on the upper end side of the switch body 101, and the lid 110 is put over the groove. The lid 110 is crimped to the switch body 101 by engaging the claw 110A with the bottom portion of the switch body 101.

The converter 108 is held by the cover 110 and is rotatably supported by the switch body 101. At this time, the push rod 107 engages with the bearing portion 106D formed on the movable contact piece holder 106, and the biasing force of the spring 111 causes the movable contact piece holder 106 to move.
Is pressed and the pressing force keeps the movable contact piece 105 in one of the converted states.

As shown in FIG. 6, an oval hole 110B is formed in the lid 110, and a cylindrical body 112 is formed in an arc portion 110C of the hole 110B.
Tighten the lower end of.

The operation rod 113 is mounted in the hollow portion of the cylindrical body 112 so as to be movable. In this example, the operating rod 113 shows a case where it is configured by an upper rod 113A and a lower rod 113B. The lower rod 113B has a flange 113C, and a spring 115 is engaged with this flange 113C to bias the operating rod 113 upward. The lower end of the spring 115 is received by the bush 116.

As shown in FIG. 7, the bush 116 has a generally conical shape and has a recessed surface 116A on its upper surface. The recessed surface 116A receives the lower end of the spring 115. Recessed surface 116A
A slit 116B is formed in the center of the
The connecting member 117 is led out from the cylinder 112 side to the switch body 101 side through 6B. The step portion 116C formed on the lower side of the bush 116 engages with the edge of the straight portion 110D of the oval hole 110B of the lid 110, and the bush 116 is attached to the lid 1.
It is locked by 10

The connecting member 117 is integrally extended from the lower end of the lower rod 113B. The connecting member 117 has a flat plate shape as shown in FIG. 8 and has a hook 117A near the lower end. In this example, the hook 117A has a blocking plate 117B on one side.
The hook portion 117A is occluded by the structure and reinforces the hook portion 117A.

The hook 117A of the connecting member 117 is engaged with one of the projecting pieces 108F of the diverter 108 so that the operating rod 113 and the diverter 108 are engaged.
Mechanically connect the two.

According to the above-described embodiment structure, the operating rod 113 is attached to the spring 115.
When the push-down operation is performed against the biasing force, the connecting member 117 rotates the diverter 108 in the counterclockwise direction in the state of FIG. This turning power is transmitted via the push rod 107 to the movable contact piece holder 10.
6 is transmitted. This transmission is similar to the rotation transmission mechanism of gears, and the frictional resistance caused by the transmission is small.

When the axis of the push rod 107 exceeds the axis of the common contact, the spring 11
The direction of the rotational moment applied to the movable contact piece holder 106 is reversed by 1 and the movable contact piece holder 106 rapidly rotates clockwise, and the movable contact piece 105 contacts the fixed contact 104.

When the pressing force on the operation rod 113 is released while the movable contact piece 105 is in contact with the fixed contact 104, the operation rod 113 returns upward due to the biasing force of the spring 115. By selecting the biasing force of the spring 115 to be larger than the biasing force of the spring 111, the converter 108 is rotated clockwise by the connecting member 117, and the movable contact piece holder 106 is rotated counterclockwise about the common contact 102. . As a result, the movable contact piece 105 separates from the fixed contact 104 and returns to the state of contacting the fixed contact 103.

[Advantageous effects of the device] As described above, according to this device, the operating rod 113
Is applied to the projecting piece 108F of the converter 108 to be converted into rotational movement, and this rotational movement is transmitted to the movable contact piece holder 106 by the gear transmission mechanism.

Therefore, there is no sliding portion in the transmission mechanism from the operation rod 113 to the movable contact piece holder 106. Therefore, the frictional resistance of the whole becomes small and the conversion operation can be performed with a small operation force. Also, since there is no sliding part, it feels good when operated. Further, the hook 117A formed on the connecting member 117 engages with the protrusion 108F to convert the linear motion into the rotary motion, so that the movable contact piece holder 106 can be converted with a small stroke. Therefore, there is an advantage that the stroke of the operating rod 113 can be reduced.

Due to the welding phenomenon of the contacts, the movable contact piece 105 and the fixed contact 104 are welded, and even if the pressing force on the operating rod 113 is released, the biasing force of the spring 115 resists the welding force and causes the converter 108 to move. Even when it cannot be rotated in the clockwise direction, since the hook 117A is engaged with the lower side of the protrusion 108F, the converter rod 108 is rotated clockwise by pulling up the operation rod 113 by hand, so that it can be moved. The welding of the contact piece 105 is cut, and the movable contact piece 105 is fixed at the fixed point 1.
It is possible to return to the initial state in which the switch 03 is touched, and there is an advantage that the switch function is not lost.

[Brief description of drawings]

1 is a sectional view for explaining an embodiment of a push button switch according to the present invention, and FIG. 2 is a perspective view for explaining the structure of a movable contact piece holder used in the embodiment shown in FIG. FIG. 3 is a partially sectional front view for explaining the structure of the converter used in the embodiment of FIG. 1, FIG. 4 is a bottom view of the converter, and FIG. 5 is an embodiment of FIG. FIG. 6 is a perspective view for explaining the structure of the push rod used in the example, FIG. 6 is a plan view for explaining the planar shape of the lid used in the embodiment of FIG. 1, and FIG. 7 is an embodiment of FIG. 8 is a sectional view for explaining the structure of the bush used in FIG. 8, FIG. 8 is a front view for explaining the structure of the connecting member used in the embodiment of FIG. 1, and FIG. 9 is for explaining a conventional push button switch. FIG. 10 is a perspective view for explaining the structure of a movable contact piece holder used in a conventional button switch. 101: switch body, 102: common contact, 103, 1
04: fixed contact, 102A: common terminal, 103A, 10
4A: fixed terminal, 105: movable contact piece, 106: movable contact piece holder, 106D: bearing part, 107: push rod, 108: converter, 108D: sliding guide part, 108F: projecting piece, 111, 1
15: spring, 112: tubular portion, 113: operating rod, 11
3C: flange, 116: bush, 117: connecting member.

Claims (1)

[Scope of utility model registration request] 1. A. A common contact provided at the center of the bottom surface of the switch body, and B. At least one fixed contact provided at a position apart from the common contact on the bottom surface of the switch body; A movable contact piece that performs a seesaw movement with the common contact point as a fulcrum and one of the free ends contacts and separates from the fixed contact point; A movable contact piece holder which holds this movable contact piece at a fulcrum position of the seesaw motion and has a bearing portion on the upper side; It is pivotally supported on the upper side of the switch body,
A protrusion having a protrusion protruding in a direction orthogonal to the rotation axis and a slide guide having a downward sliding guide; A pusher that is slidably mounted on the sliding guide of the converter and is rotatably coupled to a bearing provided on the movable contact holder and applies a pressing force toward the movable contact holder by a spring. And G. It is fixed to the lower part of the operating rod that moves up and down by a push button and has hooks that can be engaged with the upper and lower sides of the protrusion of the converter, and the converter is alternately reversed by the vertical movement of the operating rod. A connecting member for changing the direction, and A push button switch comprising: a spring that engages with the operating rod and biases the operating rod upward.