| 摘要 |
PURPOSE:To prevent intrusion into a vehicle and any theft from occurring, by installing a key inputting an identification signal discriminating between an owner of the vehicle and an intruder, judging a state of this key, while operating a timer circuit device, and emitting a warning signal after the elapse of the specified time. CONSTITUTION:At the time of alignhting, if an accessory key 12 is pulled out and a door is opened, an off-signal of this key 12 and an on-signal out of an external judging switch 16 both are inputted into a judging circuit part 10. If so, a first timer part 18 is operated, and a witch 19 is turned on after the elapse of the specified time, thus a system power source is made into a transmitter system. Afterward, when the door is closed, a second timer part 21 and a transmitting timer part 22 are reset, coming into a stand-by monitored state. Under this stand-by monitored state, it the door is unlawfully opened, these timer parts 21 and 22 get operating, and if the specified time elapses, a warning signal 26 is transmitted to a receiver 24 an owner has, and an alarm is operated for the end. |
