Abstract: The invention concerns an electromechanical lock cylinder that cooperates with evaluation electronics to recognize access authorization and has a housing that includes two opposite cylindrical receptacles, in which a lock core, which can be operated by a key, or a knob shaft, which is connected to rotate in unison with a know, are mounted to rotation, in which the lock core and/or knob shaft cooperate with a lock tab, which operates, in particular, a bolt or latch with a door lock, and, with a fitting key or access authorization, an electromechanically driven blocking or coupling element is moved from the rest position to an operating position and produces a splined connection between the key or knob and the lock tab, characterized by the fact that the lock tab is freely rotatable relative to the two lock cores or the two knob shafts in the rest position of the blocking or coupling element.

Abstract: The invention concerns an electromechanical lock. More specifically, the invention concerns an interchangeable electromechanical lock core that is equipped with a blocking cam that secures the lock core in a mating housing. The blocking cam may be coupled to a plug and the plug may be coupled to a knob. Once both couplings have occurred, the knob can be turned to actuate the blocking cam.

Abstract: The invention concerns an electromechanical lock cylinder comprising a housing in which a rotatable shaft is mounted which is connected to a lock tappet to operate a locking mechanism, and at least one knob for turning said shaft. According to the invention, in a rest position, the knob is freely turnably arranged on said shaft and that electromechanically driven locking means are provided in said shaft or in said knob for, in an operating position, coupling the shaft with the knob.

Abstract: The invention concerns an electromechanical lock. More specifically, the invention concerns an interchangeable electromechanical lock core that is equipped with a blocking cam that secures the lock core in a mating housing. The blocking cam may be coupled to a plug and the plug may be coupled to a knob. Once both couplings have occurred, the knob can be turned to actuate the blocking cam.

Abstract: The invention relates to an electromechanical lock cylinder, which interacts with evaluating electronics for recognizing an access authorization and comprises a housing that has two opposing cylindrical cavities (12). A lock core, which can be actuated by a key, or a knob shaft (11), which is joined to a knob in a rotationally fixed manner, is rotationally mounted in said cavities. The lock core and/or knob shaft (11) interact with a lock lug (13), which actuates, in particular, a bolt or latch of a door lock. When the key fits or in the event of a successful access authorization, an electromechanically driven blocking or coupling element (14) is moved out of the position of rest into an angular position, and a rotationally fixed joining between the key or knob and the lock lug (13) is effected. The invention is characterized in that the lock lug (13), when the blocking or coupling element (14) is in a position of rest, can be freely rotated relative to both lock cores or to both knob shafts (11).