| 摘要 |
A child-proof screw-cap for containers having outer threads on the neck. The screw-cap has an inner thread which screws onto the outer thread of the neck and it is opened by an axial pressure in addition to a rotational pressure. The inside wall of the closure cap (1) has a plurality of stakes (3) extending parallel to the closure axis and joined by a common cover plate (2) actuatable from above. The stakes are guided in grooves (5) on the inside of the cap and are provided with threads 3a. Clearances (6) are provided in the outer threads and these clearances have a width greater than the stakes. At least one set of threads 3a of the stakes must be brought into mesh with the outer threads by axial pressure when the stake passes a clearance (6) and a stop is provided at the bottom of a clearance at the closed position to reverse the thrust of the axial pressure to demesh the threads and prevent turning. |
