Automatic wind-up mechanism for a timepiece, especially a wristwatch, comprises an oscillating mass that drives first and second reduction gears alternately with the reduction ratios of the gears selected to optimize winding

摘要

Automatic wind-up mechanism for a timepiece, especially a wristwatch, has a mechanism with an oscillating mass (16) that drives first and second reduction gears (20, 44) in an alternating manner. The reduction ratios of the first and second gears are 1:70 and 1:140 respectively.