| 摘要 |
PROBLEM TO BE SOLVED: To provide a key input circuit which surely propagates a feeling of operation by which, a switching operation can be confirmed, having the reduced number of keys due to one-to multiple correspondence. SOLUTION: A key 1 having consecutively transforming three dimensional transformation surfaces are formed on a wiring board 2. A first switching 1 is operated by the mechanical contact of a first key part of a first key 3 with a first base board position 13 of the wiring board 2 depending on the transformation of a temporally preceding transformation surface, and a second switching is operated by the mechanical contact of a second key part of a second key 4 with a second base board position 14 of the wiring board 2 depending on the transformation of a temporally succeeding transformation surface. The temporally preceding transformation surface and the temporally succeeding transformation surface are formed into a surface convex toward the direction of movement before transformation. A plurality of succeeding click feelings are obtained and the number of keys is reduced due to one-to- multiple correspondence. COPYRIGHT: (C)2003,JPO
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