WRONG UNLOCKING PREVENTIVE CYLINDER LOCK

摘要

PROBLEM TO BE SOLVED: To provide a cylinder lock capable of surely preventing a wrong unlocking phenomenon without requiring a long minimum basic unit for key code set change. SOLUTION: An end surface 12 at the head part of a code pin 6 is formed into a protruding spherical shape having a curvature radius matched to the radius of the circumferential surface of a rotor 2, and an end surface 13 at the tip of a driver pin 7 is formed into a recessed spherical shape so that the end surface 12 of the code pin 6 entirely abuts thereon. The circumferential surface 11 of the rotor 2 is flatly cut in the peripheral part of a code pin hole 4 so that the circumferential edge part 132a of the end surface 13 of the driver pin 7 is located on the outside of the circumferential surface 11 of the rotor 2 in an unlocking state.