Patent ID: 7770424

Claim:
A cylinder lock device, comprising: a rotor case in a cylindrical shape; a rotor arranged to be rotatable inside the rotor case and including a key insert hole formed to extend in an axial direction of the rotor; a sleeve arranged to be rotatable between the rotor case and the rotor and having an engaging groove; and at least two tumblers provided in the axial direction in the rotor to be movable outward in a radial direction of the rotor to engage the engaging groove of the sleeve when biased outward in the radial direction of the rotor, the at least two tumblers being moved inward in the radial direction of the rotor to release the engagement with the sleeve by being disengaged from the engaging groove when a regular key is inserted into the key insert hole, wherein a position of the engaging groove of the sleeve in a circumferential direction of the sleeve is different between the at least two tumblers so that a side surface of the engaging groove of the sleeve is configured to contact a tumbler of the at least two tumblers but not contact a remaining tumbler of the at least two tumblers, when the at least two tumblers are rotated from an initial position in a clockwise or counterclockwise direction.