| 摘要 |
The double action push switch has a longer life and more design freedom for attaining desired load characteristics for first and second switching actions so that it occupies less area on a printed circuit board. Two plate members are housed side-by-side in a cavity of the push switch. An operating portion of a key top is positioned so that P3 NOTEQUAL P4, where P3 and P4 are the respective operating loads applied to the operating portion when one or the other of two pressing points act as the fulcrum and moments on the key top are balanced. The operating portion is positioned offset from a center vertical axis of the key top if both plate members have the same load characteristics. Thus, a first pressing force inverts one plate member for a first electrical connection, and the next pressing force inverts the other plate member for a second electrical connection. <IMAGE> |
