| CPC B62M 9/1342 (2013.01) [B62M 9/132 (2013.01); B62M 9/135 (2013.01); B62M 9/136 (2013.01)] | 21 Claims |
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1. A front derailleur comprising:
a base member including a mounting surface being configured to be contactable with one of a bicycle frame and a clamp configured to couple the base member to the bicycle frame in a mounting state where the base member is mounted to the bicycle frame, the base member including a mounting hole through which a mounting fastener is to extend in a mounting state where the base member is mounted to a bicycle frame with the mounting fastener, the mounting hole provided on the mounting surface and having a center axis;
a chain guide movable relative to the base member, the chain guide including a first guide member and a second guide member spaced apart from the first guide member in a lateral direction to form a chain receiving slot therebetween; and
a linkage structure configured to movably couple the chain guide to the base member, the linkage structure comprising:
a first link member pivotally coupled to the base member about a first pivot axis; and
a second link member pivotally coupled to the base member about a second pivot axis, the first link member being pivotally coupled to the chain guide about a third pivot axis, the second link member being pivotally coupled to the chain guide about a fourth pivot axis,
at least three of the first pivot axis, the second pivot axis, the third pivot axis, and the fourth pivot axis being non-parallel to and non-perpendicular to the center axis of the mounting hole, the center axis being inclined with respect to the at least three of the first pivot axis, the second pivot axis, the third pivot axis, and the fourth pivot axis when viewed in the lateral direction that is perpendicular to the at least three of the first pivot axis, the second pivot axis, the third pivot axis, and the fourth pivot axis.
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