| 摘要 |
PROBLEM TO BE SOLVED: To provide a new composite cylinder lock difficult to make picking. SOLUTION: A cam groove 13 is formed along a generator on the inside circumference of an outside cylinder in a position of an angle slipping approximately 90 degrees out of a tumbler locking groove 2 of a disc tumbler lock, a locking bar 14 extended along the generator of an inside cylinder 3, led in the direction of an radius on the circumference section of the inside cylinder 3 in a movable manner and energized with a direction projecting an outside edge to the outside, on the one hand, an unlocking notch 18 is formed in a side end edge of a tumbler 9 opposed to an inside edge of the locking bar 14, and when a duplicate key 7 is inserted into a key hole 5, the unlocking notch 18 of each of the tumblers is coordinated with the inside edge of the locking bar 14, and on the other hand, an imitative notch 19 is formed between a site opposed to the inside edge of the locking bar and the unlocking notch 18 in a state to insert no duplicate key into the key hole of the side end edge of at least one tumbler.
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