ADJUSTABLE RETRACTABLE HINGE

An adjustable retractable hinge (2) for articulating a door to a fixed structure, characterized in that it comprises: - a first body (4), with a corresponding first containing housing (8), intended to be inserted within a corresponding first cavity obtained either in said fixed structure or in said door, - a second body (6), which is made in one piece, and a second containing housing (10), which houses said second body (6) and which is intended to be embedded in a corresponding second cavity obtained either in said door or in said fixed structure, - three arms (52, 54, 56), shaped as a rocker and associated to said bodies (4, 6) so as to allow the rotation of the door with respect to said fixed structure, said three arms comprising two substantially equal outer arms (54,56), articulated to the first body (4) and sliding along guides obtained in the second body (6), and a central arm (52), articulated to the second body (6) and sliding along guides obtained in the first body (4), and in that said second body (6) comprises: - a central portion (28), facing said central arm (52) and interposed between the outer arms (54,56), and provided with a single fixing and adjustment element (41), which causes the movement of said second body (6) in the direction of the either greater or lesser insertion depth of the corresponding second containing housing (10), - guiding means (21,24) for said movement of said second body (6) in the direction of its insertion in the corresponding second containing housing (10), said guiding means (20, 21,24) being arranged symmetrically with respect to said adjustment element (41).