COMPOSITE PIN CYLINDER LOCK

摘要

PROBLEM TO BE SOLVED: To increase the key difference of a pin cylinder lock. SOLUTION: Pin trains 6 of n (n is a positive integer of two or above) pieces are arranged at the prescribed angular interval in the peripheral direction of an inner tube 1, and the cross sectional shape of a keyway 3 is formed into an n-gonal shape having tumbler pins and vertical sides. Recesses coupled with the tumbler pins to regulate their positions in the radial direction of the inner tube are formed at positions matched with the corresponding tumbler pins on the n side faces of a duplicate key inserted into the keyway 3.