Patent ID: 6142899
Filing Date: 2000-11-07
Classification: B62M

Abstract:
An electro-motive gear-shift control apparatus for bicycles, driven by human pedaling force and utilizing a motor for determining an output to control a gear shifting position, comprising:a housing mounted on a frame of a bicycle;a transmission mechanism to be driven with a driving force provided with a power-shaft between two pedals so as to shift gears for said gear-shift control apparatus;said driving force to be transmitted to a switch mechanism through a driving gear in said housing;said switch mechanism mounted in said housing, and said switch mechanism using a motor to convert an input driving force from said transmission mechanism into a displacement output required by said switch mechanism; andan index mechanism connected with said switch mechanism in said housing, and said index mechanism used for converting said displacement output from said switch mechanism into a step-function displacement output which is transmitted via a cable to a gear-shift apparatus of said bicycle.