Electric lock with magnetic support of the coupling element

An electric lock with a magnetic support for a coupling element comprising:

• a first internal-handle actuation element comprising a rotable sleeve;
• an electromechanical device;
• a second external-handle actuation element connected to said of said comprising a protruding stem the,
• a rotating plate;
• and
• a contrast plate that rests freely movable on said sleeve;
• wherein said rotatable plate, said contrast plate and said sleeve being rotatable and being provided with respective notches;
• and
• wherein said electromechanical device is constituted by an electric motor and by a slider aligned with said notches and actuatable by said motor so as to perform a translational motion, said slider being provided at a head thereof with a magnet and with a coupling element supported at said magnet and adapted to enter said notches when said slider is in a forward actuation position, in order to jointly couple to each other said rotatable plate, said contrast plate and said sleeve, said coupling element being constituted by a roller, and the lock further comprising a guide, said slider being fitted so as to be slideable within said guide, to perform a translational motion from a first configuration, in which the roller supported by the mannet is completely external to said notches of the plate, of the contrast plate and of the sleeve, to a second configuration, in which said roller is accommodated within said notches, rigidly coupling the plate, the contrast plate and the sleeve to each other.