| 摘要 |
Three elastic member-holding units are provided along the circumference of a cylindrical guide unit, which is a supporting unit of a first code wheel to hold a ring-shaped metallic elastic member, which is made of a band-like body of stainless steel or the like, and the metallic elastic member is extended to the inner circumference of the guide unit. In addition, the metallic elastic member extended to the inner circumference of the guide unit elastically supports the shaft of the first code wheel, which is a rotating member.
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