| 摘要 |
<p>This invention relates to a multi-speed derailleur for a cycle, which comprises a fixing member (1), two link members (5, 6) and a movable member (9) mounting a chain guide (11), and a return spring (12). …<??>In order to reduce noise and wear during gearchanging whilst providing rapid and accurate gear-changing there is provided a control member (20) for positioning the movable member (9) in any one of a plurality of predetermined positions, the control member (20) being connected to one derailleur member (9) and having a plurality of engagement portions (21) corresponding to said positions which correspond in turn to different speeds, said engagement portions (21) each having an engagement face (21a) for each speed; a retainer (30) engageable with any one of the engagement portions (21) for retaining said movable member (9) in a said position corresponding to a desired speed, said retainer (30) being pivotally connected (33, 34) to another one (6) of said derailleur members which is movable relative to said one derailleur member (9), and supporting an one end (14) of said control cable (13), whereby said retainer (30), when said control cable (13) is operated for moving forward said movable member (9) through a distance less than a given value, is retained in engagement with an engagement portion (21), and in the case of a distance greater than said given value is dis-</p> |
