| 摘要 |
<p>PURPOSE: To make manufacture easy and reduce size by engaging an abutment provided on a ring gear which is capable of free rotation normally and reversely and a swinging member with engagement part comprising a locked position, an unlocked position and a burglarproof position. CONSTITUTION: For unlocking, a ring gear abutment member 12 of a ring gear 4, capable of being freely rotated normally and reversely by a reversible motor, is caused to abut against an opposing abutment member 16. For locking, a cam 7 is rotated while making a follower spindle 10 follow the cam, and the member 12 is made to abut against the opposing abutment 1 and the cam 7 passes the spindle 10 that retreats elastically. In the case of burglarproof position, the cam 7 swings a swinging member 9 pivoted on a gear 4 located at the lock position. A protrusion 13 of the member 9 is inserted in a recess 15 of the corresponding opposing abutment 18. When the cam 7 is rotated in reverse, the burglarproof and locked states are released, and the unlocked state is restored. With this constitution, manufacturing become easy because structure is simple, and size can be reduced and driving by means of a low load motor becomes possible.</p> |
