Patent ID: 7574775

Claim:
A snap hinge for supporting a closure element, comprising: a first articulated quadrilateral; a second articulated quadrilateral, a first lever and a second lever, said first and second levers being each pivoted to said first and second quadrilaterals, so as to mutually connect said first and second quadrilaterals, said first and second levers being hinged together; said first articulated quadrilateral comprising a coupling plate for coupling the first lever to a fixed element; said second articulated quadrilateral comprising a fixing plate for fixing the second lever to a closure element; elastic means acting between a point of said first lever and a point of said second lever; an abutment element which is rigidly associated with said coupling plate; and auxiliary elastic means, which are arranged in series to said elastic means and have a first end articulated to said first lever and a second opposite end articulated to said abutment element, wherein said abutment element comprises a first pivot, and a supporting element for supporting said first pivot and which is rigidly associated with said coupling plate, wherein said coupling plate comprises a receptacle for accommodating said supporting element.