| 摘要 |
PROBLEM TO BE SOLVED: To provide a switch device for a game machine hardly affected by influence of dust and dirt and capable of improving durability and reliability by a simple structure. SOLUTION: In a start lever 30, a permanent magnet 38 is fixed to an operation shaft 34, and electromagnets 40A, 40B, 40C and 40D are arranged opposedly to the permanent magnet 38. When polarities of the permanent magnet and the electromagnets are set to the same polarity, repulsion force based on magnetism between the permanent magnet and the electromagnets works on each other, and the operation shaft 34 is centered in the neutral position. When the operation shaft 34 is operated to be shifted against the magnetism, this shift is detected by a detection part 48. A simple structure is realized as no member such as a bush is fixed slidably, and adhesion of foreign matter such as dust and dirt in this part can be prevented. Returning ability of the operation shaft 34 is not deteriorated, uneven wear of the operation shaft 34 is prevented, and consequently, durability and reliability can be improved. COPYRIGHT: (C)2003,JPO
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