| 摘要 |
<p>PURPOSE:To prevent a useless motion of a motor by a mechanical mechanism. CONSTITUTION:Where an engagement projection 11 is formed on an output rotary member 9 which is rotated by a motor 4 and an engagement unit 17, with which the engagement projection 11 is engaged, is formed on an intermediate lever 15 fixed with an output shaft 13, the engagement unit 17 comprises a radial engagement groove 18, which extends in the radial direction from the output shaft 13, and an air-cored groove 19, which expands in the shape of an arc continuously on both sides, centering on the output shaft 13. An engagement piece 12 is formed on the output rotary member 9. When the output rotary member 9 makes one rotary motion from normally to reversely by the motor 4 on the output shaft side 13, the rotary member 9 is engaged with the engagement piece 12, thereby halting the rotary motion of the output rotary member 9. What is more, when the output shaft 13 is rotated by the hand, it moves slidingly with the engagement piece 12, thereby fixing a stopper piece 22, which prevents the rotary motion of the output rotary member 9 in that means time.</p> |
