BICYCLE FRONT DERAILLEUR

摘要

A front derailleur is provided with a base member, a linkage assembly, a chain guide, an input link, a connecting link and an outer casing receiving part. The linkage assembly includes a first link coupled to the base member at a first pivot axis, a second link coupled to the base member at a second pivot axis, and an extension link coupled to the first link and the base member. The chain guide is coupled to the first and second links. The input link, is supported relative to the base member about a third pivot axis, and connects to an operation cable. The connecting link is connected to the input link about a fourth pivot axis and to the extension link about a fifth pivot axis. The outer casing receiving part is disposed on the base member and receives an outer casing through which the operation cable passes.

主权项

1. A bicycle front derailleur comprising:
a base member configured to be mounted to a bicycle frame; a linkage assembly including a first link pivotally coupled to the base member at a first pivot axis, an extension link operatively coupled to the first link and pivotally coupled to the base member, and a second link pivotally coupled to the base member at a second pivot axis; a chain guide pivotally coupled to the first and second links to move between a retracted position and an extended position; an input link pivotally supported relative to the base member about a third pivot axis, the input link being configured to be connected to an operation cable to move the input link in response to operation of the operation cable; a connecting link pivotally connected to the input link about a fourth pivot axis and pivotally connected to the extension link about a fifth pivot axis such that the linkage assembly moves in response to movement of the input link; and an outer casing receiving part configured to receive an outer casing through which the operation cable passes, the outer casing receiving part being disposed on the base member.