WIND-UP FORCE TRANSMISSION MECHANISM, MOVEMENT AND MECHANICAL TIMEPIECE

摘要

To provide a wind-up force transmission mechanism capable of effectively reducing energy loss during automatic winding-up, and also to provide a movement and a mechanical timepiece.SOLUTION: A wind-up force transmission mechanism includes: an oscillation transmission wheel 33 which is meshed with a round hole wheel 20 rotated by operation of a winding stem 17; an oscillating wheel 34 meshed with the oscillation transmission wheel 33, provided swingably around a shaft center C of the oscillation transmission wheel 33 and moving between a meshing position meshed with a square hole wheel 14 and a retracted position where meshing with the square hole wheel 14 is released; and a swing lever 40 capable of holding the oscillating wheel 34 at the retracted position.SELECTED DRAWING: Figure 3