Patent ID: 8327675

Claim:
A lock cylinder, comprising: a cylinder core which has a key channel for insertion of a matching key that is provided with a profiling; at least one feeler member disposed in the cylinder core and acted on by a spring, the at least one feeler member be held by the spring in a blocking position when a key is not inserted into the key channel; and a blocking member held in a blocking position that blocks rotation of the cylinder core when the at least one feeler member is in its blocking position, the at least one feeler member being drivable against the return force of the spring into a release position by the profiling of the matching key when the key is inserted into the key channel, in which release position the blocking member is displaceable into a position in which the blocking member unblocks the cylinder core, the at least one feeler member having a feeler arm for sensing the profiling, the arm projecting radially from a shank that is mounted rotatably in the cylinder core, the feeler arm being acted on when the matching key is inserted so that the shank rotates about its axis into the release position, wherein the spring engages against a supporting flank of the shank so that the at least one feeler member is turned into the blocking position by withdrawal of the matching key from the key channel, wherein the spring is a leaf spring which has an end portion supported on the supporting flank in order to displace the at least one feeler member back into the blocking spring is arranged to act in a radial direction on the supporting flank.