| 摘要 |
1. Safety screw closure consisting of an inner cap (1) having an internal thread and of an outer cap (9), fitting over the inner cap with axial spacing and displaceable axially towards the inner cap the purpose of unscrewing, wherein axially oriented external ribs (4) are situated on the inner cap and corresponding internal ribs (10) on the outer cap, the mutually facing surfaces of which ribs slide without axial pressure over one another without contact, characterized in that the external ribs (4) of the inner cap (1) possess, at their ends towards the cap base (5), oblique surfaces (6) inclined downwards in the screwing-up direction in the case of a right-hand thread, and the internal ribs (10) of the outer cap (9) possess, at their ends towards the open end of the outer cap, corresponding inclined surfaces (12) inclined upwards and coming into bearing on the inclined surfaces (6) of the inner cap (1) in the unscrewing direction. |
