MECHANISM FOR OPENING AND CLOSING A PLANE OR A TRAY TABLE FOR SEATS, IN PARTICULAR AIRPLANE SEATS

The invention concerns a mechanism for opening and closing a plane or a tray table for seats, in particular airplane seats, said seat (1) being fixed by means for fastening to the floor, such as a beam (2) and similar, said mechanism providing at least a substantially central arm (5) for supporting and displacing said plane or tray table (4), between a rest position and at least one use position, said at least an arm (5) being coupled to said means for fastening seat (1) to the floor (2) independently from the fixing of the seat (1) itself.