| 摘要 |
1. Safety lock cylinder comprising tumblers actuated by a key, the tumblers (3, 3', 3", 3"') each comprising a part in the form of a cylindrical pinion (2) co-operating with a rack part (9, 10, 11, 12) cut into the key (6), characterised in that each tumbler (3, 3', 3", 3"') comprises a screwthread (1) which co-operates with an internal screwthread on the cylinder core (15). |
