Lock cylinder arrangement

1. Lock cylinder arrangement consisting of a housing with a lock bit, an unlocking device and an actuation device, wherein the unlocking device comprises a coupling arranged between the actuation device and the lock bit, which coupling is decoupled in the locked state and coupled in the unlocked state, wherein the coupling can be actuated, via an electromagnetic actuator, with a control circuit which is externally fed with energy contactlessly, and wherein an induction loop which is fed with energy by means of an external induction loop and energy source and is arranged in the lock cylinder is connected upstream of the control circuit.

2. Lock cylinder arrangement according to claim 1 , wherein the external induction loop and energy source is arranged in a protected region.

3. Lock cylinder arrangement according to claim 1 , wherein the external induction loop and energy source is arranged in a key or operating device which is entrained by a user.

4. Lock cylinder arrangement according to claim 1 , wherein the control circuit comprises an electrical energy store which can be charged by means of the induction loop and the actuator is acted on, by means of the control circuit, with an increased switch-on current applied by the energy store in the switch-on phase and is acted on with a lower holding current applied by the induction loop in the holding phase.

5. Lock cylinder arrangement according to claim 1 , wherein the unlocking device comprises an electrical emergency opening device which is connected upstream of the control circuit and consists of an additional induction loop facing the unprotected region.

6. Lock cylinder arrangement according to claim 1 , wherein the unlocking device comprises a mechanical emergency opening device which consists of a predefined break opening in the lock cylinder.

7. Lock cylinder arrangement according to claim 1 , wherein the actuation device is a fixedly incorporated spring-loaded push, rotary or pull knob.

8. Lock cylinder arrangement according to claim 1 , wherein the actuation device is a key accommodation with a key that is inserted from the outside.

9. Lock cylinder arrangement according to claim 1 , wherein the control circuit is controlled by a code evaluation circuit which is external or is internal and arranged in the lock cylinder.

10. Lock cylinder arrangement according to claim 9 , wherein the energy supply of the external induction loop in the protected region can be switched on and off via a control line by means of a central external code evaluation circuit.

11. Lock cylinder arrangement according to claim 1 , wherein the external induction loop is a constituent of a lock-cylinder presence sensor, by means of which the coupling to the induction loop arranged in the lock cylinder can be monitored via an evaluation circuit.

12. Lock cylinder arrangement according to claim 9 , wherein the control circuit can be activated directly by means of an internal code evaluation circuit in the lock cylinder in the event of code match via a control output of the code evaluation circuit.

13. Lock cylinder arrangement according to claim 12 , wherein the induction loop arranged in the lock cylinder is constructed as a combined energy and code receiver, which receives energy and code from a key inserted into the key accommodation.

14. Lock cylinder arrangement according to claim 1 , wherein the coupling of the unlocking device comprises a spring-loaded rocker arm which is coupled with the actuation device and can be pivoted between a position of engagement and a position of non-engagement with the lock bit, wherein a support surface of the rocker arm is supported on a spring-loaded rocker which can be pivoted between a coupled position and a decoupled position of the rocker arm and wherein the rocker is fixed in the relaxed position by an actuator in the an active state of the actuator and can be pivoted by force action of the rocker arm in a passive state of the actuator.