| 摘要 |
PROBLEM TO BE SOLVED: To provide a duplicate key difficult in manufacture.SOLUTION: A key of a cylinder lock comprises: a wavy long groove b formed along the insertion direction of a blade in a central part of a flat surface of its long plate-like blade so as to respectively correspond to an engaging part of a different part; a recess c formed on a side surface of the blade; and three kinds of engaging object parts of a horizontal notch groove a positioned in a non-communication state between this recess and the wavy long groove and formed toward a central part-near part from an edge part of the flat surface, in which when inserting the duplicate key into a key hole of a lock body, respective engaging parts of three kinds of plate-like or annular movable obstacle pieces, respectively engage in response to respective engaging object parts of the blade, so that respective receiving recessed places of the respective plate-like or annular movable obstacle pieces moved in the predetermined direction, coincide with an engaging plate part of a locking bar, and thus, when rotating an inner cylindrical body in the unlocking direction together with the duplicate key, the inner cylindrical body relatively rotates with respect to an outer cylindrical body by the wedge action generated between a lock cam groove and the locking bar. |
