| 摘要 |
<p>The cycle crank derailleur has a chain guide and displacement fork, the latter fixed to the cycle frame by a pivot. This allows the fork to move in a plane roughly parallel to that of the crank. The fork (20) has, at least on one side (22a), a chain retainer (25,26), of which is below the chain. Part of the chain is housed between the two parts (22a,22b) of the fork, projecting into this space. The retainer has a tab (25) bent to limit the movement of the arm.</p> |
