Connection element for connecting two parts of eyeglasses and process for connecting two parts of eyeglasses by means of said connection element

A connection element for connecting two parts of eyeglasses, said connection element comprising:

• a first body (2), which is intended to be fixed to a first part (101) of eyeglasses, is extended along an extension axis (X) between a first external end (21) and a first internal end (22), and is provided with a through hole (23) extended between an inlet opening (24) made on said first external end (21) and an outlet opening (25) made on said first internal end (22) and having a diameter smaller than said inlet opening (24);
• a second body (3), which is intended to be fixed to a second part (102) of said eyeglasses, is extended along said extension axis (X) between a second internal end (31), which is directed towards the first internal end (22) of said first body (2), and an opposite second external end (32), and is provided with a threaded hole (33) extended starting from said second internal end (22);
• a connection screw (4) inserted, at least partially, in the through hole (23) of said first body (2) and in the threaded hole (33) of said second body (3) in order to mechanically constrain said first body (2) to said second body (3);
• said connection screw (4) comprising:
• a stem (41) inserted in said through hole (23) and in said threaded hole (33), longitudinally extended along a screwing axis (Y) and provided with at least one threaded portion (410) engaged via screwing in the threaded hole (33) of said second body (3);
• a head (42) fixed to said stem (41), which has width greater than said stem (41) and greater than said outlet opening (24), and acts in abutment against said first body (2) in order to maintain said first body (2) constrained to said second body (3);
• wherein:
• the through hole (23) of said first body (2) comprises an internal chamber (230) which is placed as a connection between said inlet opening (24) and said outlet opening (25), is extended at least partly as an undercut with respect to said inlet opening (24), and houses the head (42) of said connection screw (4);
• said inlet opening (24) is provided with a first shaped edge (240), which defines an opening of said inlet opening (24) and is provided with at least one first narrowing section (241);
• along said first narrowing section (241), said internal chamber (230) being provided with at least one interference shoulder (231) directed towards the first internal end (22) of said first body (2);
• the head (42) of said connection screw (4) is provided with a second shaped edge (420), which is provided with at least one second narrowing section (421);
• wherein said connection screw (4) is movable, by means of rotation around said screwing axis (Y), between:
• at least one alignment position, in which the second narrowing section (421) of said head (42) is angularly aligned with the first narrowing section (241) of said inlet opening (24) and the second shaped edge (420) of said head (42) is contained within the opening of said inlet opening (24), in order to allow the passage of said head (42) through said inlet opening (24), and
• at least one misalignment position, in which the second narrowing section (421) of said head (42) is angularly offset with respect to the first narrowing section (241) of said inlet opening (24) and said interference shoulder (231) is interposed between said head (24) and the first external end (21) of said first body (2) and is susceptible to receive in abutment said head (42) in order to prevent said head (42) from exiting from said through hole (23) through said inlet opening (24).