SPEED CHANGE OPERATING DEVICE FOR BICYCLE

摘要

A speed change operating device (6) for a bicycle capable of effecting speed change operation while braking operation is being carried out, as well as performing an optimum speed change operation in accordance with various running conditions, said device comprising a speed change operating body (14) supported so as to be rotated around the axial center of a handle bar (3), a cable take-up body (107), a locking mechanism (15) for locking said cable take-up body in a predetermined rotating position, and a transmission mechanism (101) for transmitting rotating operations of said speed change operating body to said cable take-up body, wherein said transmission mechanism comprises a transmission ring (103) connected so as not to rotate relatively to said cable take-up body and having an engagement toothed portion on its outer circumferential portion and an engagement pawl (110) held so as to radially slide between said speed change operating body and said transmission ring and adapted to be shifted radially inwardly when said speed change operating body is rotated so as to be brought into engagement with said engagement toothed portion, whereby said cable take-up body is rotated in a cable pulling direction or a cable paying-out direction when said speed change operating body is reciprocatingly rotated from a predetermined rotation starting point.