| 摘要 |
PURPOSE:To make it possible to lock and unlock a door of a car through radio signals by providing a code signal output means, signal modulation means and signal comparison means, etc. to transmitting and receiving devices provided in the car and transmitting and receiving devices provided separately on the out side of the car. CONSTITUTION:A radio type locking device is constituted of a door lock section 1 incorporated into a car and a key card 2 to lock and unlock the door 1. While, the door lock section 1 is approximately constituted of a code generation circuit 3, antenna 5 to transmit and receive code signals, code comparator 11, and door lock mechanism 12, etc. The key card 2 is separately provided on the outside of the car, and it is approximately constituted of a transmitting and receiving antenna 19 from the door lock section 1, code signal detection circuit 22, detection comparator 24, transmission circuit 18 and code modulation circuit 20, etc. Code signal waves transmitted from the key card section 2 are received from the antenna 5 of the door lock section 1, and in the code comparator 11, code signals outputted from a detection circuit 10 is compared with code signals set to the code signal generation circuit 3, and when the code signals correspond with them, locking signals or unlocking signals are outputted to an actuator 13. |
