| 摘要 |
A convertible child resistant two-piece closure comprises an inner cap (41) having a circular top panel (42) and an integral skirt (42) having internal threads (32) for engagement with corresponding external threads surrounding a conventionally threaded container exit neck (31). A circular array of depressions (30) are provided in the top panel (42). Projecting upwardly and arranged in the same circular array on the top panel (42) are a plurality of ratchet lugs, shaped in ramp form. An outer cap (11) has a skirt (12) and, on the inner side of the top panel thereof, a plurality of leaf springs (16) biasing the inner cap and outer cap axially away from one another and a plurality of downwardly extending drive lugs (17) positioned in a circular array of equal radius to the array of depressions (30) and ratchet tugs on the inner cap top panel.
<??>To facilitate complete removal of the outer cap member (11) to convert the closure into a non-child resistant closure, the depending skirt (12) has an inner vertical groove (13) and a tab (15) to facilitate splitting of the outer cap and easy removal. To render the closure permanently child resistant the tab (15) is grooved at (14) to allow in to be broken off. A tear strip (50) can be attached to the bottom edge of either the skirt (42) or the skirt (12) to give visible evidence of previous opening or use of the closure. |
