Electronically controlled security cylinder lock has a blocking function which is controlled by a data transfer unit and receiving and transmitting units in the lock and key

摘要

The key (1) has a high frequency transmitter (11) and a low frequency receiver (9) and the cylinder lock has a high frequency transmitter/receiver (4) and low frequency transmitter/receiver (3) while an adjacent data transfer unit (6) has a high frequency transmitter/receiver (12). The key transmits signals (d,f) to the lock and the data unit which either accepts or rejects the data code to release the blocking mechanism or not.