| 摘要 |
<p>PURPOSE:To prevent shutting-up of a key, and automatically lock a door by controlling a detecting means on whether or not the key exists indoors and a door locking-unlocking means to lock or unlock the door according to a detecting result of the detecting means on whether or not a person exists indoors, by a control means. CONSTITUTION:Simultaneously when a key 1 is inserted in an engine key cylinder, a switch 27 is turned off, and supply of electric power to a transmitting circuit 31 from a battery 30 is stopped. A key detector 2 has a receiving circuit from the key 1, and outputs this detecting signal only when the key l exists in a car. A door lock controller 4 controls so that when the key 1 is detected by the key detector 2 and the human body is not detected by a human body detector 3, a door assembly 5 holds a door in an unlocked condition, and prevents shutting-up of the key. In this case, a driver is informed of it by an annunciator 6. On the other hand, when the key 1 is not detected by the detector 2 and the human body is not detected by the human body detector 3, the door assembly 5 locks the door.</p> |
