| 摘要 |
PROBLEM TO BE SOLVED: To provide a mechanical winding device for a watch which reduces the noise when an oscillating weight moves in the opposite direction to the winding direction.SOLUTION: An automatic winding device for a spring of a watch movement includes a weight 1 fixed on a support via a bearing 3 including a ring 4 which drives, in only one direction of rotation called the winding direction, a transmission gear in order to wind the mainspring. In this winding device, on the one hand, the bearing 3 is of the one-way type and blocks the rotation of the weight 1 in the opposite direction to the winding direction, called the blocking direction, and on the other hand, the device includes means 7 for decoupling the weight 1 from the bearing 3 in at least the blocking direction when the weight 1 exerts on the bearing 3 a torque higher than a desired value.SELECTED DRAWING: Figure 1 |
