| 摘要 |
This device comprises a blade-type switch (27) which itself comprises first and second blades (13, 14); a first magnet (15) magnetises the first blade (13) with a given magnetic polarity (N); a rotary element (17) placed in proximity to the second blade (14); and a second magnet (16) fixed to the rotary element (17) which has different magnetic poles (N) and (S), distributed in its circumferential direction, the second blade (14) being placed facing the second magnet (16). <IMAGE>
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