Lock device for an electronic locking system, electronic locking system and method

A lock device for an electronic locking system, the lock device comprising:

• an input member arranged to rotate about an input rotational axis;
• an output member arranged to rotate about an output rotational axis;
• an energy harvesting arrangement configured to generate electric energy from rotation of the input member in a first direction about the input rotational axis;
• and
• a selective transfer device movable between a locking state, in which the output member cannot be rotated about the output rotational axis by means of rotation of the input member about the input rotational axis, and an unlocking state, in which the output member can be rotated about the output rotational axis by means of rotation of the input member in the first direction about the input rotational axis;
• wherein the transfer device is powered by the energy harvesting arrangement;
• wherein the input member comprises an engaging structure;
• wherein the output member comprises an engageable structure arranged to be engaged by the engaging structure;
• and
• wherein the transfer device is constituted by a blocking device movable between a blocking state, in which the blocking device actively blocks the output member from rotating about the output rotational axis, and an unblocking state, in which the output member is allowed to rotate about the output rotational axis;
• wherein the engaging structure is rotatable about the input rotational axis through an angular clearance prior to engaging the engageable structure;
• and
• wherein the engaging structure is freely rotatable through the angular clearance in the blocking state of the blocking device.