| 摘要 |
A motor-driven derailleur comprising a base member, a moveable member, and a linkage mechanism including a link member coupled to the base member and to the moveable member so that the moveable member moves relative to the base member. The link member is pivotably coupled to one of the base member and the moveable member through a first link coupling member 150. The derailleur also comprises a motor 262 capable of causing relative movement between the moveable member and the base member on actuation thereof. The derailleur is provided with a position detecting mechanism 870 for detecting an absolute position of the moveable member relative to the base member. The position detecting mechanism can comprise a potentiometer 870 disposed at the base member.
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