| 摘要 |
The invention concerns a structure (1) comprising a base (2), a body (3), a slider (4), respective means (9, 13) for the pivoted assembling of the base (2) and the body (3), respective means (8, 21) for locking the slider (4) in rotation, and respective means (24, 25) of the pin-helical groove type for moving the slider (4). The invention is characterised in that the respective means (8, 21) locking the slider (4) in rotation are arranged in radially internal zones of the base (2) and of the slider (4); the body (3) comprises at least a pin (14) projecting radially inwards, from its wall (10) which defines said axial conduit (11), and the slider (4) comprises at least a helical groove (25) arranged in its wall (15), starting from its outer surface, each pin (14) of the body (3) being arranged such that it is positioned at the entrance of each helical groove (25) of the slider (4) when said respective means (9, 13) assembling the base (2) and the body (3) are engaged with each other.
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