| 摘要 |
A rear derailleur for bicycle gears comprises an upper body which can be fixed to the bicycle frame, a lower body carrying a chain tensioning wheel for the bicycle chain and being movable relative to the upper body to bring the chain into selective engagement with a series of sprockets carried by the hub of the rear wheel of the bicycle, and a flexible cable for causing movement of the lower body. This lower body is carried by a control lever which is supported for rotation and axial sliding on a cylindrical guide element fixed to the upper body. Transmission device is interposed between the flexible cable and the control lever and is adapted simultaneously to impart rotation and axial sliding to the control lever, relative to the cylindrical guide element, as a result of operation of the flexible cable. |
