UPHOLSTERED ELEMENT WITH CONTINUOUSLY UNIDIRECTIONALLY SHAPABLE FLAT INTERNAL FRAME

UPHOLSTERED ELEMENT WITH CONTINUOUSLY UNIDIRECTIONALLY SHAPABLE FLAT INTERNAL FRAME Upholstered element, particularly a cushion, mattress or similar, with unidirectionally variable shape, comprising in its interior a quadrangular, substantially flat structure consisting of a plurality of flattened and coplanar bar-shaped members interconnected along their longitudinal sides by hinge members, the said hinging members being of the frontally inset type and being shaped in such a way as to permit rotations of the various bar-shaped members in one direction only from the flat structure configuration, in such a way as to permit the formation of shapes of the structure, and consequently of the cushion, of amplitude and form variable in relation to the requirements for the use of the cushion or, when reversed, the maintenance of a stable supporting surface.