| 摘要 |
In an intermittent link mechanism including a driven gear engageable with a drive gear to cause a predetermined changeover operation and including a recess partly breaking the tooth train of the driven gear to intermittently breaking the linkage with the drive gear, the driven gear is integrally formed with a cam for engagement with a stopper to lock the driven gear at the disconnected position. The improvement comprises first spring biasing the stopper for continuous contact with the cam, a blocking surface and an urging corner both formed at one end of the stopper back to back with each other, an engagement surface formed in the cam for contact with the blocking surface, a slanting surface formed in the cam for contact with the urging corner, a pin formed on the driven gear and slidably received in an elongated slot formed in an changeover member, and second spring biasing the changeover member so as to apply a starting rotational force to the driven gear. |
