COMPOSITE CENTRAL LOCKING COMBINING INTRUSION -BURGLAR ALARM FOR LOCK DEVICE OF AUTOMOBILE

PURPOSE: To eliminate a false alarm accidentally tripped by an authorized vehicle user on the safety state of a vehicle by inserting a key into a locking cylinder and to improve practical applicability. CONSTITUTION: Locking positions 3-5 of a driver door, a fellow passenger door and a rear door are connected together at switching contacts 3.1-5.1, the contacts 3.1-5.1 are switched when the keys of the locking positions 3-5 are operated, and they can be switched by the operation element of a central locking device (ZVA) 1 via an opening/closing rod or the like. The switching contacts 3.1, 4.1 are connected to an intrusion-burglar alarm system (EDW) 2 together with electric switches 3.2, 4.2 operable only by specific keys for the locking positions 3, 4. A controller 2.1 is energized when the potentials of the contacts 3.1, 4.1 are changed and the output signals of the electric switches 3.2, 4.2 are inputted, and an alarm whistle is rung when a signal is fed from one of input ends 2.4.