| 摘要 |
A handle mounted bicycle derailleur controller is mounted to a bicycle handle bar for controlling a derailleur of the bicycle. The derailleur controller includes a casing including a cylindrical wall and a concentric hub fit over the handle bar. A number of teeth are mounted in a receiving space defined between the cylindrical wall and the hub. A rotation sleeve is rotatably fit over the hub and forms a slot to engage an expanded end of a cable whereby rotation of the sleeve leads to a change of the length of the cable which in turn causes gear shifting. The rotation sleeve includes a detent retainer integrally formed therewith. The detent retainer includes two opposite U-shaped portions open toward each other. A leaf spring has a substantially L-shaped body having first and second sections connected to each other by an angled connection serving as a detent and two free ends respectively and movably received in the U-shaped portions of the detent retainer. The detent is selectively engageable with valleys defined between the teeth for controlling the length change of the cable. A handle is fit over and rotatably fixed to the sleeve. Thus, a bicycle rider can rotate the handle to drive the sleeve for changing the length of the cable by engaging the detent with a desired one of the valleys of the teeth.
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