| 摘要 |
PROBLEM TO BE SOLVED: To provide a simplified magnetism sensor made by combining a plurality of cylinder-shaped magnetism sensor switches which are made to operate by a complex outer magnet with a specific combinational condition. SOLUTION: The magnetism sensor comprises a plurality of cylinder-shaped magnetism sensor switches S, N, and a complex outer magnet for which, a specific condition for combination of polarity and mutual distance is stipulated, and respective outer magnets M1 , M2 of the complex outer magnet are made to correspond to the plurality of cylinder-shaped magnetism sensor switch S, N.
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