US Patent 10252772 Electronic shifting device and bicycle using the same

An electronic shifting device and a bicycle using the same are provided. The electronic shifting device includes a primary controller, a first electronic derailleur unit, a second electronic derailleur unit, a cable, a main power supply and a first control unit. The first electronic derailleur unit is disposed adjacent to a first sprocket set, and the second electronic derailleur unit is disposed adjacent to a second sprocket set. The first electronic derailleur unit and the second electronic derailleur unit are configured to move a chain between a plurality of sprockets. The cable electrically connects the primary controller, the first electronic derailleur unit and the second electronic derailleur unit. The main power supply provides electrical power to the primary controller, the first electronic derailleur unit and the second electronic derailleur unit by the cable. The first control unit is configured for wirelessly transmitting a first control signal to the primary controller.