CYLINDER LOCK

PROBLEM TO BE SOLVED: To provide a cylinder lock hardly allowing operation by a picking member for improving an anti-picking measure. SOLUTION: On both side inside faces 3a and 3b on the long sides of a key insertion hole 2 in the front face part of an inner cylinder 1, in which a plurality of tumblers unshown in a figure are arranged in line, slide member guide holes 5A and 5B separating from each other in the longitudinal direction of the key insertion hole for crossing the key insertion hole 2 extension direction are formed in different levels. In the slide member guide holes 5A and 5B, slide members 6A and 6B and springs 7A and 7b are arranged from the key insertion hole 2 side, while plugs 8A and 8B are forcibly inserted to the outside of the sliding member guide holes 5A and 5B. In this way, the slide members 6A and 6B are protruded into the key insertion hole 2 by energizing force of the springs 7A and 7B for closing the key insertion hole 2. COPYRIGHT: (C)2003,JPO