| 摘要 |
PROBLEM TO BE SOLVED: To provide a contact spring for a switch, which provides simplification of constitution, long-life, and stabilization of characteristics by reduction of the number of parts. SOLUTION: The contact spring is equipped with: the contact spring body which is installed on a substrate and forms a plate state; a first dome part installed at the outer peripheral part of the contact spring body in a dome state so as to obtain a click action; a second dome part coaxially installed on the inner peripheral side of the first dome part of the contact spring body in the dome state so as to obtain the click action; a first contact installed at the contact spring body; and a second contact installed at the second dome part. By pressing the contact spring body, the first dome part is deformed, the first contact becomes abutted on a pattern of the substrate side and a certain kind of electric connection state is constituted. By pressing it furthermore, the second dome part is deformed, the second contact also becomes abutted on another pattern of the substrate, and another electric connection state is obtained. COPYRIGHT: (C)2008,JPO&INPIT
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