Patent ID: 8033198

Claim:
A shift control device for bicycle comprising: a shift-up control apparatus including an operable shift-up controller, a first link member connected with the shift-up controller and a first pawl pivotally mounted on the first link member; a shift-down control apparatus including an operable shift-down controller and a second link member connected with the shift-down controller, with the second link member including first and second actuating members; a transmission control assembly including a locking member, a housing assembly and first and second pawls, with the locking member moveable in the housing assembly at various positions for various bicycle speed transmissions and including first and second engaging sections, with the first engaging section selectively engaged by the first pawl of the shift-up control apparatus and the second engaging section selectively engaged by the first and second pawls of the transmission control assembly, with the shift-up controller enabling movement of the first link member and the first pawl of the shift-up control apparatus to engage with the first engaging section, with further movement of the first link member causing travel of the locking member in a first direction and movement of the locking member causing the second pawl of the transmission control assembly to disengage from the second engaging section and engage with the second engaging section reciprocally, and with the shift-down controller enabling the first actuating member to cause the first pawl of the transmission control assembly to engage with the second engaging section and the second actuating member to cause the second pawl of the transmission control assembly to disengage from the second engaging section and further movement of the shift-down controller causing travel of the locking member in a second direction reverse to the first direction.