| 摘要 |
A stator ( 42 ) is hooked in a frame body ( 10 ) away with a prespecified space from a spindle ( 2 ), so that it is not necessary to fix the stator with a screw. The stator ( 42 ), therefore, can easily be mounted, and further as it is not necessary to provide a screw hole in the frame body ( 10 ), so that the need for waterproofing processing associated with a screw hole is eliminated. Further the stator ( 42 ) is hooked in a protrusion ( 53 ) of an electronic unit ( 50 ) inside the frame body ( 10 ) away with a prespecified space from the spindle ( 2 ), so that a rotation thereof in the peripheral direction of the spindle due to play and rattle is small and a measurement error can be suppressed.
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