| 摘要 |
PURPOSE:To aim at preventing a vehicle from being stolen, by providing detecting switches on a passenger compartment actuating plate, a door key rotary plate, a door rock rotor and a windshield pane, respectively, so that an alarm is issued when the opening of the windshield is detected even though the door is closed after the actuating plate is pushed in. CONSTITUTION:A switch S1 is turned on and off by means of an actuating plate which is disposed in the passenger compartment and is moved vertically to lock and unlock a key, and switches S2, S3 are similarly turned on and off by a door key rotating plate and a door lock engaging element, respectively. A switch 10 is provided on a windshield pane section and is turned on and off in association with the opening and closing of the windshield pane section. When the actuating plate is depressed to turn on the switch S1 so as to close the door and the switch S3 is turned on, the output terminal Q of a flip-flop FF1 becomes 1 so as to energize a relay Ry, and therefore, a circuit section is deenergized. At this time, when the switch 10 is turned off due to breakage of the windshield or the like, the buzzer 32 is energized by means of an OR circuit and an amplifier AMP2, thereby it is possible to effectively prevent the vehicle from being stolen. |
