Access control device, has lock with blocking element, actuation element, electronic key, electric circuit with receiving unit for reception of identification data from key, and evaluation circuit for determining access authorization

摘要

The device has a lock (2) with a blocking element, an actuation element (3), an electronic key (5), an electric circuit with a receiving unit for the reception of identification data from the key, and an evaluation circuit for determining access authorization on the basis of the received identification data. The evaluation circuit works together with the actuation element and the blocking element for the selective blocking or unblocking of the lock. The identification data is sent by capacitive field created by the key. A facility is provided for coupling the field to the person (4) carrying the key, with the receiving unit encompassing a capacitive coupling surface, in such a manner that an alternating current circuit is closed when the lock is touched or when the lock is approached by the person. A current flow, created by the lock, is captured by the receiving unit.