| 摘要 |
<p>PURPOSE:To prevent certainly a failure in locking a door without deteriorating operability of door-locking. CONSTITUTION:In the case where a key 1 moves to a position distant from any of receptible ranges A1 of (A) code signal reception circuits 4 and a door D is closed with its lock 22 unlocked, a locking failure judgement circuit 12 judges that the door is not locked and emits a signal for turning a timer on to the timer 12a. As a specified period of time passes with clocking made by the timer 12a, the door lock is put in the state of locking. Therefore, a failure in locking the door lock can be prevented certainly.</p> |
