Sliding door or window

A sliding door or window (1) comprising at least:

• a fixed frame (2);
• at least one mobile frame (3) or sash which slides horizontally, opening and closing relative to the fixed frame (2), having a perimeter groove (C) for slidably housing operating means (7);
• at least one sliding unit (4, 4a), or pair of carriages, associated with the lower horizontal member (3a) of the sash (3) and resting on a horizontal base track (5), allowing the sash (3) to slide in both directions (F1, F2), opening and closing;
• a controlling member (6) located on the sash (3) and connected to operating means (7) which, when actuated by the controlling member (6) lift the sash (3) from the carriages (4, 4a) so that it can be slid open, and lower the sash (3) when the sash (3) is returned to the closed position, the door/window (1) being characterized in that it comprises at least;
• a first slider (8) slidably fitted in the groove (C) made in an upper horizontal member (9) of the sash (3) and connected to the operating means (7) in such a way as to move in coordination with them;
• at least one first contact element (10), or plug, located in the proximity of the first slider (8) and rotatable at least between a lowered, non-operating position and a raised operating position;
• drive means (11) which act between the slider (8) and the contact element (10) and which, through the relative movement between the means (11) themselves and the first contact element (10), are designed to allow at least a first position of lifting and stable positioning of the first contact element (10) when the sash (3) moves from the raised configuration to the lowered configuration in such a way that, when in the lowered configuration, the sash (3) cannot be lifted off the fixed frame (2).