Importance

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Abstract

There is provided a contact spring in a small-sized push-button switch capable of lessening contact obstacle between contacts caused by fine dust, and reducing variation in load characteristics even if heat is applied thereto or the switch is repetitively operated. The contact spring in the switch for allowing a movable contact provided at an inner side of a movable contact spring to contact or break off the contact with an opposed fixed contact so as to render the movable contact and the fixed contact to be in one of an electrically on or off state, wherein multiple movable contacts are formed by protruding a material of the movable contact spring by a thickness of not more than two thirds of a thickness of the movable contact spring on a circumference about a central portion of the movable contact spring and positioned at an equal central angle relative to the center of the movable contact spring in a direction from an outside to an inner side of the movable contact spring by means of half-cut working while forming a peripheral edge of a protruded contact surface in a sharp blade-shape.

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First Claim