| 摘要 |
PURPOSE:To correct incomplete fulfillment of necessary conditions to prevent burglary by giving alarm in case required items for said prevention remain unfulfilled. CONSTITUTION:Contact (a) of a seat switch 1 is closed in case a driver leaves the seat, while it is opened in case the driver takes seat. A burglary detecting switch 2 consists of a key switch 2A, which detects on/off positions and fitted or removed status of an ignition key, window glass switch 2B which detects opening and closing of the window glass, and a door switch 2C which detects existence of a door lock. A vibration detection warning circuit 10 detects by a vibration sensor 11 such an exterior vibration as is caused to a car in case intrusion is attempted by breaking a door or glass. When any aforementioned abnormality is detected, a transistor Q1 or Q4 is closed and warning is sounded by a buzzer 3 or 4. |
