| 摘要 |
A bicycle rear derailleur apparatus for smoothly guiding a bicycle chain to the rear sprocket of a bicycle is provided. The rear derailleur is equipped with a base component, a link mechanism, a movable component, Outer Plate 20 , Inner Plate 21 , Guide Pulley 22 , and Tension Pulley 23 . The base component is a component which is mounted on the frame. The link mechanism is a mechanism of which one end is mounted on the base component. The movable component is a component which is mounted on the other end of the link mechanism, and which can be relatively displaced from the base component. The outer plate is a component which is mounted on the movable component so as to undulate like a see-saw. The inner plate is a component which is installed so as to face the outer plate. The guide pulley is a component which is mounted onto a portion on one edge of the plates, between the plates, so as to freely rotate and move in the axial direction, and which can be engaged with the chain. The tension pulley is a component which can be engaged with the chain and has an engagement center that is offset from the engagement center of the guide pulley in a direction towards the outer plate, and which is mounted onto a portion on the other edge of the plates, between the plates, so as to freely rotate.
|
