| 摘要 |
A closure device includes a base (1) and a top (23). The base (1) has an aperture (13) and the top (23) has an aperture (27). The top (23) is movable laterally relative to the base (1) between a first position in which the aperture (13) of the base and the aperture (27) of the top are not in alignment and a second position in which the apertures are in alignment. Biasing spring (22, 43) is provided with in the top so as to extend laterally between the base and the top with a free end of the biasing spring urging the top towards the first position in which the apertures (13, 27) are not in alignment. |
