JPH036992Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a push button switch that is used in electronic equipment and is designed to provide a tactile feel during operation.

[Background of the idea]

Push-button switches used in electronic devices are equipped with a movable contact having a click spring action to connect and separate a pair of fixed contacts in order to provide a good operating feel during operation. is kept in constant contact with a fixed contact on one side, and when the push button is pressed against the spring force, the movable contact is made to feel with the fixed contact on the other side, thereby creating a connection between both fixed contacts. I'm trying to get it connected.

Conventionally, such a type of push button switch is constructed as shown in FIG. 4. That is, as shown in the figure, an insulating substrate 1
The fixed contact 12 on one side is arranged in an arc shape on the fixed contact 1 on the other side, and the fixed contact 13 on the other side is arranged on the fixed contact 1 on the one side.
A pair of fixed contacts 12 and 13 are formed by providing them at the center of the area surrounded by 2,
A movable contact 14 for connecting and separating the two fixed contacts 12 and 13 is configured to be operated by a push button 15.

Here, the movable contact 14 has a protrusion 14a formed at the center of the spring steel material in order to provide a click spring action in order to provide a good operating feel.
The peripheral portion 14b is a flat plate, and by arranging the central portion 14a facing upward,
When the peripheral part 14b is always brought into contact with the fixed contact 12 on one side, and the push button 15 is pressed, the central part 14a of the movable contact 14 is pushed down against the spring force, and is brought into contact with the fixed contact 13 on the other side. By bringing them into contact, both fixed contacts 12 and 13 are brought into contact.

However, in the structure of the conventional push button switch described above, since the peripheral edge 14b of the movable contact 14 is always in contact with the fixed contact 12 on one side, the fixed contact 13 on the other side is directly connected to the fixed contact 12 on one side. The structure is such that it cannot be led out from the opening of the contact 12. For this purpose, fixed contact 1
3, a through hole 16 is bored in the substrate 11, and when the through hole 16 is led out from the back surface of the substrate 11 through the through hole 16, or when the output is led out from the opening of the fixed contact 102, as shown in FIG. In order to prevent constant contact between the movable contact 14 and the movable contact 14 as shown in FIG. As described above, the conventional push button switch requires a structure in which a through hole 16 and an insulating coating 17 are formed to prevent the fixed contact 13 from coming into contact with the movable contact 14 when the push button 15 is not operated. The disadvantage was that it was complicated. In particular, when providing the insulating coating 17, it is necessary to take measures against its wear, and when forming the through hole 16, if it is not possible to provide a terminal on the back side of the substrate 11, it is difficult to form this. There was also the problem that it was not possible.

[Purpose of invention]

The present invention has been made in order to eliminate the drawbacks of the prior art described above, and provides a push button switch having a structure in which both fixed contacts can be formed on the same plane of the board without any insulating coating or the like. Its purpose is to

[Summary of the idea]

In order to achieve the above-mentioned object, the push button switch according to the present invention has a fixed contact on one side disposed in the center on the board, and a fixed contact on the other side formed around the fixed contact on the one side. By arranging the movable contact, which has a click spring action and which turns the switch ON/OFF by connecting and separating the fixed contacts, the central part thereof protrudes toward the board. The center part is always brought into contact with the fixed contact on one side, and the peripheral part is arranged to be spaced apart from the contact on the other side, so that when the operator for switching operation is pressed, the peripheral part of the movable contact It is characterized in that it is constructed so that it can be pressed into contact with the fixed contact on the other side against the spring force.

[Example of idea]

Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

First, FIG. 1 and FIG. 2 show a first embodiment of the present invention, and FIG. 1 shows an insulating substrate, and on the substrate 1 there are fixed contacts 2 on one side and fixed contacts 2 on the other side. Contact 3
are arranged by printed wiring, etc. Each of the fixed contacts 2 and 3 has the configuration shown in FIG. That is, a fixed contact 2 on one side is arranged at the center, and fixed contacts 3 on the other side are arranged in an arc shape around the fixed contact 2 so as to surround it. The fixed contact 3 has both open ends led out to the outside.
The fixed contact 2 is connected to a switch terminal (not shown), and is led out through an opening in the fixed contact 3 to be connected to a switch terminal (not shown).

A switch case 4 is mounted on the board 1. The switch case 4 is provided with a cylindrical space 4a which is partially open on the side, and the fixed contacts 2 and 3 are positioned within the space 4a. A movable contact 5 having the action of a click spring is also arranged in the space 4a.
The movable contact 5 has a protruding central portion 5a and a peripheral portion 5b.
has a substantially dome-like shape with a circular flat plate portion, and a dotted or circular protrusion 5 is provided on the peripheral edge portion 5b.
c is protruded in the same direction as the protruding direction of the central portion 5a, and is lower in height than the central portion 5a. The movable contact 5 has a central portion 5a within the space 4a.
facing downward, this part is always in contact with the fixed contact 2 on one side, and the peripheral edge 5b, including the protrusion 5c, is mounted in a state separated from the fixed contact 3 on the other side.

Next, 6 brings the protrusion 5c of the peripheral portion 5b of the movable contact 5 into contact with the fixed contact 3 by pressing with the operator's fingers, etc., so that both the fixed contacts 2, 3
The push button 6 is shown as an operator for connecting between the two, and the push button 6 is formed in a stepped shape having a large diameter portion 6a and a small diameter portion 6b. The lower surface of the large diameter portion 6a of the push button 6 is the peripheral edge portion 5b of the movable contact 5.
When in contact with the switch case 4, the switch case 4 is housed in the space 4a, and the small diameter section 6b is provided to protrude upward from the top surface of the switch case 4. A mounting plate 7 is fixed to the upper surface of the switch case 4 with bolts or the like, and the mounting plate 7 engages with the stepped portion of the push button 6. Although it can be pushed toward the board 1, it is configured to be held so that it does not deviate from the space in the switch case 4.

This embodiment has the above-mentioned configuration, and under normal conditions, the center portion 5a of the movable contact 5 is in contact with the fixed contact 2 on one side, and the fixed contact 3 on the other side is in contact with the peripheral edge of the movable contact 5. Move away from 5b and turn off the switch.
is in a state of At this time, the push button 6 is positioned such that it comes into contact with the peripheral edge 5b of the movable contact 5, and the step between the large diameter part 6a and the small diameter part 6b engages with the mounting plate 7.

Next, when the push button 6 is pressed with a finger or the like, the movable contact 5 having spring properties is deformed, but at this time, a reaction force due to the spring force of the movable contact 5 acts on the push button 6, and this reaction The force increases in proportion to the amount of pressure. Here, since the movable contact 5 has a click spring action, a reversal operation is performed when a predetermined amount of pressure is reached, the reaction force is rapidly reduced, and this click feeling causes the push button switch to The operation feeling becomes good. When the push button 6 is further pressed after this reversal operation, the protrusion 5c on the peripheral edge 5b of the movable contact 5
comes into contact with fixed contact 3, and the switch is turned on.

Furthermore, when the pressing force on the push button 6 is released, the push button 6 is pushed upward by the restoring force of the movable contact 5, and its protrusion 5c separates from the fixed contact 3, returning the switch to the OFF state. do.

As mentioned above, the center part 5a of the movable contact 5 is kept in constant contact with the fixed contact 2, and the peripheral part 5b is kept in contact with the push button 6.
Since the fixed contact 3 is brought into contact with the fixed contact 3 by the operation, both the fixed contacts 2 and 3 can be provided on the same surface of the substrate 1, and there is no need to insulate a part of them.

Next, FIG. 3 shows a second embodiment of the present invention,
In this figure, the same or equivalent components as in FIG. 1 are designated by the same reference numerals as in FIG. 1, and the explanation thereof will be omitted.

However, a positioning rod 8 is vertically provided on the lower surface of the push button 6, and the positioning rod 8 passes through an insertion hole 9 formed in the center portion 5a of the movable contact 5 in a loose-fitting manner, and also passes through the insertion hole 9 formed in the center portion 5a of the movable contact 5. The guide hole 10 is loosely fitted into the guide hole 10 formed in the guide hole 10 . Further, the fixed contact 2 on one side is provided around this guide hole 10.

Even with the configuration as described above, the same switching action as in the first embodiment described above is performed. Furthermore, since the movable contact 5 is positioned by the positioning rod 8 of the push button 6, its position is stable and will not move unnecessarily within the space 4a.

[Effect of idea]

As explained above, according to the present invention, the projecting part at the center of the movable contact is always brought into contact with the fixed contact on one side, and the fixed contact on the other side is brought into contact with the peripheral part of the movable contact. Switch ON/
Since it is configured to perform an OFF operation, it is no longer necessary to arrange both fixed contacts on the same side of the board and provide special insulation protection, and the configuration of the switch can be simplified.

[Brief explanation of drawings]

1 and 2 show a first embodiment of the present invention, FIG. 1 is a sectional view of a push button switch, and FIG.
The figure is an explanatory diagram of the wiring pattern, Figure 3 is a sectional view of a push button switch showing the second embodiment of the present invention, Figure 4 is a sectional view of a conventional push button switch, and Figure 5 is another conventional push button switch. It is an explanatory diagram of a wiring pattern of technology. DESCRIPTION OF SYMBOLS 1... Board, 2, 3... Fixed contact, 5... Movable contact, 5a... Center part, 5b... Peripheral part, 6...
push button.

Claims (1)

[Scope of utility model registration request] A fixed contact on one side is disposed at the center of the substrate, and a fixed contact on the other side formed around the fixed contact on one side is disposed, and has a click spring action, and a fixed contact is provided between each of the fixed contacts. By arranging a movable contact that makes contact with and separates the substrate so that its central portion protrudes toward the substrate, the central portion is always in contact with the fixed contact on one side, and the peripheral portion of the movable contact is placed in contact with the fixed contact on the one side. The movable contact is arranged so as to be spaced apart from the contact on the other side, and an operator for switching operation is provided so as to be able to press the peripheral edge of the movable contact into contact with the fixed contact on the other side against the spring force thereof. A push button switch featuring