| 摘要 |
PURPOSE:To entirely constitute a train wheel member of plastic, by guiding a part of a train wheel to be held to a lever cooperated with an external operation part and detaching the meshing of a part of the trains wheel by lever operation at the time of the correction of time to bring a part of said train wheel into a non-load state. CONSTITUTION:Normally, a winding stem 2 and a sliding pinion 3 are loosely engaged and the sliding pinion 3 is driven by a minute gear 7. When the winding stem 2 is pulled out, the engagement of the winding stem 2 with an operation lever 4 is detached and the lever 4 rotates in a clockwise direction around a shaft 1-a by elastic force. As a result, a train wheel holding part operates and a third wheel 5 is inclined while guided by the handle of a train wheel receiving side and the meshing of the pinion of a third wheel 5 with a center wheel 6 is detached. The sliding pinion 3 made of plastic is frictionally engaged with the projection of the winding stem 2 by the drawing-out of the winding stem 2 to be cooperated with the operation of the winding stem 2. In this state, wheels 7, 6 are driven through the sliding pinion 3 to apply the time correction of date, hr and min. By this constitution, because time correction can be performed in a non-load state, a train wheel member can be entirely made of plastic and cost reduction can be achieved. |
