| 摘要 |
<p>A pressure member unit (24) having eight dome-shaped elastic pressure members (16 to 23) made of rubber is arranged on a circuit board. A total of eight elastic pressure members are respectively provided at four corner parts (elastic pressure members 16, 18, 20 and 22) of side parts of a rectangular form of a pusher (26) and at four positions (elastic pressure members 17, 19, 21 and 23) between them. Six switch parts are provided so as to only correspond to the two elastic pressure members (16 and 20) at a pair of corner parts which are located diagonally among the elastic pressure members (16 to 23) and to the elastic pressure members (17, 23, 19 and 21) respectively adjacent to both the corner parts. <IMAGE></p> |
