| 摘要 |
PURPOSE:To stop a trail wheel stably by utilizing the spring force of spring part by forming the rotation part and stop part of a stop lever of rigid bodies and further forming spring part in the same body with the stop part. CONSTITUTION:The stop lever 5 consisting of the spring part 5a, rotation part 5b, and stop part 5c is formed in one body including an engagement part 5e and a contact part 5d. The stop part 5c and rotation part 5b use rigid bodies and a force for braking is previously charged in the spring part 5c in the form of initial deflection. While a winding stem 1 is drawn out by one stage, the elastic arm 3b of a setting lever jumper 3 is released from a setting lever pin to allow the fast correction of a calendar. When the winding stem 1 is further drawn out, the engagement part 5e of the stop lever 5 is disengaged from the pin 2c to rotate counter-clockwise around a shafr 5b by the retaining strength of the spring part 5a, and the stop part 5c is pressed against the tooth surface 6a of the second wheel 6 to obtain secure braking force. |
