JPH0562925U - switch - Google Patents

Abstract

(57) [Abstract] [Purpose] An object of the present invention is to provide a switch that can relax the limitation of current capacity in a switch that is required to be small and thin. [Structure] A base portion 12 on which an electric circuit 14 is formed,
The electric circuit 14 is provided on the base portion 12.
And a switching member that is formed of a conductive material and that is provided on the button portion and that opens and closes the electric circuit when the button portion moves toward the electric circuit. 22 and a biasing means 20 for constantly biasing the button portion 18 in a direction away from the electric circuit 14.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a switch, and more particularly to a switch that opens and closes an electric circuit formed in a base portion.

[0002]

[Prior Art]

 A conventional example of a switch for opening and closing an electric circuit formed on the base portion will be described with reference to FIG. FIG. 2 is a sectional view of a switch used in a calculator or the like. An electric circuit 102 is printed on a printed wiring board 100 which is a base portion. A button portion 104 is arranged above the electric circuit 102. The button portion 104 is formed integrally with the rubber support portion 106. The support portion 106 urges the button portion 104 in a direction away from the electric circuit 102 by its elasticity. The bottom surface 108 of the button portion 104 is coated with carbon. Therefore, when the button portion 104 is pushed downward against the urging force of the support portion 106 and comes into contact with the electric circuit 102, the carbon surface formed on the bottom surface 108 of the button portion 104 closes the electric circuit 102. To do.

[0003]

[Problems to be solved by the device]

 However, the above conventional switches have the following problems. The switch having the structure shown in FIG. 2 is advantageous in terms of size reduction and thickness reduction, but it is the carbon surface formed on the bottom surface 108 of the button portion 104 that closes the electric circuit. There is a limit. There is no problem with a small current such as a calculator, but there is a problem that it cannot be used for electrical products that require a certain amount of current capacity. Therefore, it is an object of the present invention to provide a switch that can reduce the current capacity limit in a switch that is required to be small and thin.

[0004]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention has the following configuration. That is, a base portion on which an electric circuit is formed, a button portion provided on the base portion and capable of moving in and out of the electric circuit, and a button portion formed of a conductive material and provided on the button portion. Is equipped with a switching member that opens and closes the electric circuit when it moves in the electric circuit direction, and a biasing means that constantly biases the button portion in a direction away from the electric circuit.

[0005]

[Action]

 The operation will be described. The opening and closing of the electric circuit is performed by a switching member that is provided in the button portion and that opens and closes the electric circuit when the button portion moves in the electric circuit direction. Since the switching member is made of a conductive material, the allowable current capacity is large.

[0006]

【Example】

 Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, the configuration will be described. In FIG. 1, reference numeral 10 denotes a substrate, which is a substrate made of a synthetic resin having a certain degree of hardness. The substrate 10 is not always necessary, and may be provided depending on the electric device used. Also, other members than the substrate 10 may be substituted. Reference numeral 12 is a flexible printed wiring board which is an example of a base portion and is formed of a synthetic resin sheet. The flexible printed wiring board 12 is fixed to the upper surface of the substrate 10 by an appropriate means such as sticking. The base portion is not limited to the flexible printed wiring board 12, but if the flexible printed wiring board 12 is used, it can be easily fixed even if the surface of the substrate 10 to be fixed is a curved surface. An electric circuit 14 is formed on the upper surface of the flexible printed wiring board 12. The electric circuit 14 is made of a conductive material such as copper foil.

Reference numeral 16 denotes a switch body, which is made of rubber (eg, silicon rubber). A button portion 18 and a support portion 20 are integrally formed on the switch body portion 16. The switch body 16 is fixed to the upper surface of the flexible printed wiring board 12 by a suitable means such as sticking. The support portion 20 is formed as an urging means so as to stand upright, and elastically supports the button portion 18 projecting downward from the lower surface of the switch main body portion 16. However, when the support portion 20 is pushed downward from above, the support portion 20 elastically deforms to allow the downward movement of the button portion 18. That is, the button portion 18 can be moved toward and away from the electric circuit, and is constantly urged upward by the support portion 20 (in a direction away from the electric circuit 14). A switching member 22 is formed of a conductive material such as a copper alloy and is fixed to the lower surface of the button portion 18. The switching member 22 is arranged at a position corresponding to the plurality of open contacts of the electric circuit 14. Normally, since the button portion 18 is separated from the electric circuit 14 by the support portion 20, the switching member 22 is also in a state of not being in contact with the contact of the electric circuit 14. When the button portion 18 is pushed in the direction of the electric circuit 14 against the urging force of the support portion 20, the contacts of the electric circuit 14 are bridged and closed. The switching member 22 can be fixed to the button portion 18 by outsert molding when the switch body 16 is resin-molded, for example.

In the switch configured as described above, when the button portion 18 is pushed toward the electric circuit 14 against the urging force of the support portion 20 by the user's finger or the like, the contacts of the electric circuit 14 are bridged. Then, the electric circuit 14 can be closed. When the push of the button portion 18 toward the electric circuit 14 is released, the supporting portion 20 returns the button portion 18 to the previous position (the position shown in FIG. 1) by its elastic restoring force, so that the contact point of the electric circuit 14 is changed. It is opened again and the electric circuit 14 can be opened. The opening / closing of the electric circuit 14 is performed by the switching member 22 provided on the button portion 18, and the switching member 22 is made of a conductive material. Therefore, the allowable current capacity is equal to that of the conventional switch (the switch of FIG. 2). Since it is larger than that of (1), it is also small and thin, and can be used as a switch for various electric devices.

Although the elastic supporting portion 20 is used as the urging means in the above embodiment, a suitable elastic member (eg, spring) may be incorporated inside. Further, although the electric circuit 14 is closed when the button portion 18 is pushed in the above embodiment, the electric circuit 14 may be opened when the button portion 18 is pushed. Although various preferred embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and it goes without saying that many modifications can be made without departing from the spirit of the invention. is there.

[0010]

[Effect of the device]

 When the switch according to the present invention is used, the opening and closing of the electric circuit is performed by the switching member that is provided in the button portion and that opens and closes the electric circuit when the button portion moves toward the electric circuit. Since the switching member is made of a conductive material, the allowable current capacity is large. Therefore, it is possible to provide a switch having a large versatility, which can be used as a switch for various electric devices with a simple structure, and so on.

[Brief description of drawings]

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

FIG. 2 is a sectional view showing an example of a conventional switch.

[Explanation of symbols]

 12 flexible printed wiring board 14 electric circuit 18 button part 20 support part 22 switching member

Claims (1)

[Scope of utility model registration request] 1. A base portion on which an electric circuit is formed, a button portion provided on the base portion and capable of moving in and out of the electric circuit, and a button portion made of a conductive material and provided on the button portion. A switching member that opens and closes the electric circuit when the button portion moves in the electric circuit direction, and a biasing unit that constantly biases the button portion in a direction away from the electric circuit. Switch to do.