| 摘要 |
PURPOSE:To surely prevent the damage of an electromotive equipment and an operation device and besides, prevent shortening of the life time of a driving motor in the case that abnormality occurs in the operation circuit, etc., of the driving motor, in an electromotive shifting operation device for an electric apparatus. CONSTITUTION:The transmission to an output shaft 18 or the break of the driving force of a motor is performed by engaging or releasing the roller at the top of a locking lever 21 with or from the groove 20 made in the sun gear 17 being the differential gear of a planetary reduction gear, and the output shaft 18 is provided integrally with a cam plate 19, and by the projection made at the end of the cam plate 19, the engagement with the recess 20 of the locking lever 21 is compulsively released when the output shaft 18 acts over a steady position. |
