Automatic transmission system for bicycle

Abstract

The invention includes a wheel speed detector, disposed beside a wheel of the bicycle for detecting a rotational speed of the wheel; a crankset forward rotation detector, disposed beside a crankset of the bicycle for detecting forward rotational speed of the crankset; a control module, attached on a handle bar of the bicycle, having a display, an operation interface and a program, and electrically connected to the wheel speed detector and the crank forward rotation detector for receiving sensing signals therefrom and outputting control signals; a gear change driver, electrically connected to the control module for receiving the control signals and driving at least one derailleur of the bicycle to change gears; and a power supply, having a battery to supply electric power to the automatic transmission system.

Dependencies are inferred from the claim text.