FIELD: furniture.
SUBSTANCE: rigidity adjustment device for use in a lying structure or a sitting structure is disclosed. The device contains a rigid frame with two opposite sides and at least one non-elastic flexible elongated element passing between two opposite sides. Each end of the non-elastic flexible elongated element is directly or indirectly connected to one of opposite sides, while at least one end is indirectly connected, using an elastic flexible elongated element. There is a set of elongated springs passing in an even or curved surface, while ends of each elongated spring are attached to one of at least one non-elastic flexible elongated element at two separate junctions. A tension device is made with the possibility of compression and loosening of the non-elastic flexible elongated element (elements) between two separate junctions, thereby providing the adjustment of a distance between two separate junctions of each non-elastic flexible elongated element, and thereby providing the adjustment of curvature and height of elongated springs.
EFFECT: obtaining a rigidity adjustment device for a lying or sitting structure.
16 cl, 12 dwg
