| 摘要 |
An electromotive gear-shift control apparatus for bicycles, which is to be used in a bicycle provided with a gear-shift apparatus; the driving force for such apparatus is furnished with the power of pedals thereof; a motor is used for determining the input of the gear shift; the apparatus comprises a housing, a transmission mechanism, a switch mechanism, and an index mechanism; the housing is a fixed member fastened on the frame of a bicycle; the power source for gear shift is supplied by the driving force of the power shaft between two pedals of bicycle; the switch mechanism is mounted in the housing; the input power form the transmission mechanism is converted, by means of the motor, into a displacement output required by gear shift; the index mechanism is mounted behind the switch mechanism inside the housing, and it is used for converting the vector displacement form the switch mechanism into a step-function output, which is then transmitted, through a cable, into the gear-shift apparatus of the bicycle.
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