Spectacles-frame hinge

Connection hinge for spectacles frames of the type adapted to connect the lateral sidearm of a spectacles frame to the front part of the same spectacles frame; the connection hinge being characterized by comprising: a cup-shaped body, which is structured so as to be fixed cantilevered in a rigid manner onto the lateral side of the front part of a spectacles frame, and is provided with a central cavity of substantially cylindrical shape and with a transversal, oblong, pass-through slot or cut, which extends along the lateral side of the cup-shaped body while remaining on a lying plane locally substantially perpendicular to the reference axis of the central cavity, and penetrates in the cup-shaped body up to said central recess; a central pin which has a cylindrical shape substantially complementary to that of the central cavity of the cup-shaped body, and is inserted in axially rotatable manner in the central cavity of the cup-shaped body; and a transverse locking plug which has an end rigidly fixed to the body of the central pin, and is structured so as to protrude cantilevered from the cup-shaped body engaging in pass-through and sliding manner the pass-through slot or cut present on the lateral side of the cup-shaped body, and to be rigidly fixed or incorporated on the proximal end of the lateral sidearm of the spectacles.