| 摘要 |
A speed-changing device for a bicycle wherein a boss of an operating lever is rotatably supported to a lever shaft, a holder supported non-rotatably to a fixing member including the lever shaft incorporates a sound-generating mechanism comprising a ridge-groove member having a ridge-groove surface and a sound-generator engageable therewith to generate a sound, thereby forming a sound-generator unit, one of the ridge-groove member and sound-generating of the unit is adapted to engage for associated motion with the boss of the operating lever, so that the operating lever is turned to generate a sound. |
