Actuation device for a control cable for a bicycle gearshift

Details Actuation device for a control cable for a bicycle gearshift Actuation device for a control cable for a bicycle gearshift

2005-02-04

2008-12-09

Kim, Chong H (Department: 3682)

Machine element or mechanism

Control lever and linkage systems

Hand operated

Reexamination Certificate

active

07461573

ABSTRACT:
The described actuation device comprises a casing, intended for the attachment to the handlebar of the bicycle, a cable-winding bobbin, angularly mobile in the casing about a main axis of the device, a first driving mechanism, acting on the bobbin to rotate it in a first angular direction, a second driving mechanism, acting on the bobbin to rotate it in a second angular direction opposite the first, as well as indexer assembly for removably holding the bobbin in predetermined angular positions. In accordance with the invention, the indexer assembly comprise first countering means, to counter the rotation of the bobbin in the first direction, and second countering means, distinct from the first countering means, to counter the rotation of the bobbin in the second direction. Asymmetric operation is thus obtained which allows active actuation to be set both for upward gearshifting and for downward gearshifting.

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