| 摘要 |
In a displacement sensor ( 10 ), a shaft ( 24 ) of a movable member ( 14 ) comprises a tubular part ( 26 ) having an opening ( 26 c) at one end. A rod-form permanent is inserted into the tubular part ( 26 ) through the opening ( 26 c) . A spacer ( 32 ) is fitted over a narrow portion of the rod-form magnet ( 28 ). The thickest portion of the magnet ( 28 ) and the spacer ( 32 ) contact the side wall of the tubular part ( 26 ) tightly, so that the magnet ( 28 ) is disposed coaxially with the tubular part ( 26 ). A stopper ( 26 d) is formed on the opening ( 26 c) of the tubular part ( 26 ), so that the magnet ( 28 ) does not move axially. Therefore, the magnet ( 28 ) is mounted in a prescribed position in a movable member ( 14 ) with a high degree of accuracy.
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