Electric lock with multiple-function spring

An electric lock with multiple-function spring (11), with a locking element, a decoding assembly for a code bearing component, a first actuation element connected to an internal handle, and a second actuation element connected to an external handle both coupled to the locking element by an electromechanical device; the second actuation element comprises a protruding stem (3) that ends with a rotating plate (4), a rotatable contrast plate (7) that rests freely on a rotatable sleeve (5) coupled to the locking element, the plates (4, 7) and the sleeve (5) being provided with respective notches (8); the electromechanical device has a motor (17) with a worm screw (14) on its shaft, a slider (9), coupled to the screw (14) through a spring (11) with one end (13) fixed on the lock body (2), the central portion (12) engaged on the slider (9), and the opposite end (13) accommodated between two crests (15) of the screw (14), and a coupling element (19) for entering notches (8) to couple plates and sleeve.