Patent ID: 8235408

Claim:
A bicycle shift control apparatus for a bicycle with a control device used to set a plurality of speed stages of a bicycle transmission, wherein each speed stage corresponds to a range of traveling states of the bicycle, wherein the apparatus comprises: a traveling state detecting circuit that detects a traveling state of the bicycle; a manually operated switch that provides a switch signal indicating that the switch has been operated; and a control circuit that receives signals from the traveling state detecting circuit and the switch; wherein, after power is applied to the control circuit, after initialization of the control circuit is complete and the control circuit is ready for processing signals from riding operation of the bicycle, after a shift mode of the control circuit is set to a selected shift mode and while the control circuit is in the selected shift mode, when the control circuit thereafter receives the switch signal from the manually operated switch indicating that the switch has been operated, the receipt of the switch signal from the manually operated switch causes the control circuit, while maintaining the shift mode the control circuit was in at the time the switch signal was received: (i) to determine a proper speed stage by determining which range of traveling states contains the traveling state of the bicycle detected by the traveling state detecting circuit, wherein the proper speed stage that corresponds to the range of traveling states that contains the traveling state of the bicycle detected by the traveling state detecting circuit; and (ii) to automatically provide a control signal to set the bicycle transmission to the proper speed stage.