| 摘要 |
A push button switch including a case, a key top fastened to the case, an elastic member disposed between the case and the key top and acting to upwards urge the key top and a contact portioned so as to confront a spring member fastened to an operation member of the key top so that the contact portion is pressed by the spring member when the key top is depressed, the push button switch comprising: a movable member disposed between the operation member of the key top and a projection wall of the case whereby the operation member and the movable member can be moved with respect to each other and the movable member and the projection wall can be moved with respect to each other.
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