Electronic lock and key system having key identifying function

Details Electronic lock and key system having key identifying function Electronic lock and key system having key identifying function

E - Fixed Constructions

05

B

70/3, 342/11.1

E05B 49/00 (2006.01) G07C 9/00 (2006.01)

Patent

CA 1277396

ABSTRACT OF THE DISCLOSURE When a key is inserted into a key hole of a lock, magnetism creating means creates a magnetic flux corresponding to a predetermined magnetic code set in the key. Magnetism detecting means detects the magnetic flux and outputs a signal representing the detected magnetic flux. Decision means compares the signal value with a predetermined value, and outputs an agreement signal when the two values are the same. Driving means enables at least unlocking by key operation in response to the agreement signal. The magnetism detecting means outputs, as the above signal, a voltage corresponding to the magnitude of the detected magnetic flux or pulses having a frequency corresponding to same. At least one of material, dimensions, and thickness of the magnetic element determines the predetermined magnetic code. Further, an unlocking mechanism has a magnetic actuator which unlocks the lock by coupling the lock with unlocking means via a cam in response to the agreement signal.

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