| 摘要 |
PROBLEM TO BE SOLVED: To adjust the pressure of a pressure member in an appropriate state and to maintain the operation feel even if the spring constant of a spring changes. SOLUTION: The switch unit 30 locks pressure members 16a, 16b and 16c by a switch body 62 in such a way that the pressure members can reciprocate at prescribed strokes. The switch unit 30 comprises movable plates 31a, 31b and 31c to be screwed into the switch body 62, and springs 33a, 33b and 33c inserted between the pressure members 16a, 16b and 16c and the movable plates 31a, 31b and 31c for biasing the pressure members 16a, 16b and 16c in the direction of projection. With this structure, the pressure of the pressure members 16a, 16b and 16c can be adjusted in the appropriate state even if the spring constants of the springs 33a, 33b and 33c change, and further, the operation feel can be maintained. COPYRIGHT: (C)2006,JPO&NCIPI
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