Hinge for doors

A hinge for the mutual engagement of panels, the hinge comprising:

• two opposed wing-like elements (1, 2) pivotally engaged to each other, each wing-like element comprising a basic body provided with through-holes configured to house screws that are configured to fasten each wing-like element to a panel, and
• a locking element (3) configured to engage with the two opposed wing-like elements (1, 2) at a lateral end of said two opposed wing-like elements when the two opposed wing-like elements (1, 2) are in an engaged position, to prevent said two wing-like elements from lift-off separation,
• a first wing-like element (1) of the two opposed wing-like elements comprising a basic body (15) with a generically quadrilateral profile and a rounded end extending therefrom having a circular cavity (16) therein;
• a second wing-like element (2) of the two opposed wing-like elements comprising a basic body (22) with a partially polygonal profile and a partially rounded profile at an end configured to engage with the first wing-like element (1), said end having a tapered cylindrical body forming a pivot pin (24) configured to be received in said circular cavity;
• wherein said locking element (3) is positioned in said circular cavity opposite said pivot pin and includes an engagement and manoeuvring means (5) on an outer surface thereof and an engagement tooth (12) configured to engage with a matching part (21) of the circular cavity (16),
• wherein said circular cavity (16) of said basic body (15) of the first wing-like element (1) includes an upper thickening portion (19) extending for half a height of the circular cavity (16), said upper thickening portion (19) including two invitation grooves (17, 18) having different widths,
• wherein at a lower portion of the circular cavity (16) opposite the upper thickening portion (19), a housing chamber (20) is formed and configured to engage said locking element (3).