| 摘要 |
On a printed wiring board (13), switch parts (21 to 24) are disposed so as to correspond to four positions of corner parts in the side parts of a rectangular form of a pusher (20). A switch circuit member is provided. The switch circuit member includes the first to fourth switch parts and a plurality of resistances connected together between a pair of terminals and a resistance value between the pair of terminals is changed for each of different switch operation patterns of the switch parts in accordance with the pressing operations of the side parts of the pusher.
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