A sprung hinge for supporting closure elements, comprising: a first articulated quadrilateral and a second articulated quadrilateral, which share a first level and a second lever and have as their base element respectively a plate for coupling to a fixed element and a plate for fixing to a closure element; elastic means, which act between mutually opposite points of one of said first and second articulated quadrilaterals (2, 3), the hinge having a closure configuration, in which the breadth of the angle (α) formed between the plane of arrangement of said coupling plate and the plane of arrangement of said fixing plate is substantially equal to π/2 rad, and a open configuration, in which the breadth of said angle is (α) substantially greater than π rad; auxiliary elastic means, which are arranged in series to said elastic means, respectively, and act between mutually opposite points of the other of said first and second articulated quadrilaterals (2, 3); a first pivot and a second pivot being associated to said fixing plate, an element for supporting said first and second pivots (16, 17) being rigidly associated with said fixing plate, said supporting element comprising a flat portion, which is parallel to the plane of arrangement of said fixing plate, and two first lugs, which protrude from said flat portion, for supporting the opposite ends of said first and second pivots (16, 17); characterized in that said supporting element comprises two second lugs, which protrude from said flat portion for supporting a third pivot, which is parallel to said first and second pivots (16, 17) and around which one of said first and second levers (4, 5) is articulated, said fixing plate comprising a receptacle for accommodating said supporting element, said receptacle comprising two mutually opposite and parallel edges, from which corresponding sides protrude, said flat portion being anchored to said sides. a first articulated quadrilateral and a second articulated quadrilateral, which share a first level and a second lever and have as their base element respectively a plate for coupling to a fixed element and a plate for fixing to a closure element; elastic means, which act between mutually opposite points of one of said first and second articulated quadrilaterals (2, 3), the hinge having a closure configuration, in which the breadth of the angle (α) formed between the plane of arrangement of said coupling plate and the plane of arrangement of said fixing plate is substantially equal to π/2 rad, and a open configuration, in which the breadth of said angle is (α) substantially greater than π rad; auxiliary elastic means, which are arranged in series to said elastic means, respectively, and act between mutually opposite points of the other of said first and second articulated quadrilaterals (2, 3); a first pivot and a second pivot being associated to said fixing plate, an element for supporting said first and second pivots (16, 17) being rigidly associated with said fixing plate, said supporting element comprising a flat portion, which is parallel to the plane of arrangement of said fixing plate, and two first lugs, which protrude from said flat portion, for supporting the opposite ends of said first and second pivots (16, 17); characterized in that said supporting element comprises two second lugs, which protrude from said flat portion for supporting a third pivot, which is parallel to said first and second pivots (16, 17) and around which one of said first and second levers (4, 5) is articulated, said fixing plate comprising a receptacle for accommodating said supporting element, said receptacle comprising two mutually opposite and parallel edges, from which corresponding sides protrude, said flat portion being anchored to said sides.