| 摘要 |
A bicycle rear derailler shifting controller, which includes a base with a coupling tube, a rotary knob coupled to the coupling tube of the base, a cover plate fastened to the base to guide rotary motion of the rotary knob, and a derailler cable driven by the rotary knob to shift the rear derailler mechanism of the bicycle, wherein the coupling tube has a longitudinal sliding track and a cable hole; the derailler cable has one end inserted through the cable hole at the coupling tube and terminating in an endpiece, which is moved by the rotary knob along the longitudinal sliding track; the rotary knob has a sleeve coupled to the coupling tube of the base, the sleeve has an axial center hole, which receives the coupling tube, and a stepped guide flange inside the axial center hole, the stepped guide flange having radially extended straight edges and axially extended sloping edges alternatively arranged at one end adjacent to the base and moved with the rotary knob against the endpiece of the derailler cable to shift the rear derailler mechanism of the bicycle.
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