Coaster brake for bicycle, has geared connection portion provided between the pedal at bottom bracket and brake lever, which is electrically controlled by magnet corresponding to speed or direction of bicycle

摘要

The coaster brake (25) has a brake lever (12) which is controlled by the pedal at the bottom bracket (2). The free wheel arranged on the bottom bracket is provided with clamping portions for clamping outer ring and inner ring. The geared connection portion is provided between the pedal at the bottom bracket and brake lever. The brake lever is arranged in the power flow direction at the exit of the free wheel, behind the geared connection portion. The geared connection portion is electrically controlled by magnet (40) corresponding to speed or direction of bicycle.