| 摘要 |
A push button device in which convex portions are provided on the lower surface of a button positioned to turn a switch mounted on a substrate ON and OFF. The convex portions are provided at a position symmetrical with a center axis of the button, and a resilient member is provided in contact with the lower surface of the button and placed in pressure contact with the convex portions. A smooth restoring force when the resilient member is restored from being and compression deformation is obtained through the joint use of an action of the convex portions of the button to bend the resilient member and a compression action caused by a small area. As a result, the switch can be turned ON and OFF without much pressure, and the button is always reliably returned to its original position when pressure is removed. Also, the convex portions engage the resilient member to prevent play.
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