| 摘要 |
A shift control device includes a mount, a derailleur cable control unit, which is auto-reversibly pivotally mounted on the mount for the mounting of a derailleur cable and has a first sector gear portion, a second sector gear portion, and a one-way rotary driven portion, a first shifter, which is auto-reversibly pivotally mounted on the mount and has a one-way rotary driving portion for driving the one-way rotary driven portion to rotate the derailleur cable control unit in one direction, and a second shifter, which is auto-reversibly pivotally mounted on the mount and has a first tooth and a second tooth for meshing with the first sector gear portion and the second sector gear portion to control return action of the derailleur cable control unit when the second shifter is biased relative to the mount, the first tooth and the second tooth being moved over the sloping teeth of the first sector gear portion and the sloping teeth of the second sector gear portion tooth by tooth respectively when the first shifter is operated to rotate the derailleur cable control unit.
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