| 摘要 |
PROBLEM TO BE SOLVED: To strongly constitute a plate-like tumbler, while attaining simplification of a structure, facilitation of assembly work and reduction in manufacturing cost.SOLUTION: An inner cylinder 6 having a key insertion hole 4 for inserting a key K and a tumbler installing hole 5, is rotatably equipped in an outer cylinder 1 having a front face opening part 1a, and the plate-like tumbler T having a key engaging hole facing to the key insertion hole 4 and an engaging part freely engageable-disengageable to an engaging object part of an inner peripheral surface of the outer cylinder 1 corresponding to the tumbler installing hole 5, is operably arranged in the engaging-disengaging direction in the tumbler installing hole 5 of the inner cylinder 6, and the tumbler T is provided with a reinforcement body of projecting to the key engaging hole in an attitude along the engaging-disengaging direction, and one end part of projecting to the key engaging hole in this reinforcement body, is constituted in a pin part operated in an engagement releasing state of separating the engaging part from the engaging object part of the outer cylinder 1 bv abutment with a normal key K inserted into the key insertion hole 4. |
