ELECTROMECHANICAL CYLINDER LOCK

摘要

An electromechanical cylinder lock (Fig. 1) includes an outer lock shell (20) and a rotatable lock barrel (22) located therein which is controlled by dual locking features. A side bar or fence (60) selectively blocks and permits rotation of the barrel (22) with respect to the shell (20) in response to insertion of a key into a keyway (34) in the barrel (22). A slider bar (50) is movable between a blocking position in which the side bar (60) is prevented from permitting rotation of the barrel (22), and an unblocking position in which the side bar (60) permits rotation of the barrel (22). Alternately, a blocking mechanism (Fig. 19) is provided to block motion of tumbler pins in the cylinder lock (30). A shape memory alloy actuator (706), such as a wire made of nitinol, disposed in the barrel (22) is activated by an electric current in response to determination by an electronic control device whether an attempt to open the lock is authorized. Thermal interlock protection from external heating of the lock is also provided.