Programmable cylinder lock having a high number of combinations

A programmable cylinder lock of the type comprising a stator (1) and a cylindrical rotor (2), mounted inside the stator (1) for rotation around its own axis and having a keyhole extending in the axis direction for insertion of a key (3), and comprising inside rotor (1) a number of key followers (4) movable along their own longitudinal and transversal directions, intended to cooperate with the codification conformations of a key (3) inserted into the keyhole of rotor (2), and a number of locking pins (6) movable along their own longitudinal direction, which form the lock blocking members, said key followers (4) and locking pins (6) forming together a number of pairs each including a locking pin (6) and a key follower (4) and having toothings (7,5) intended to mutually cooperate, in different relative positions, in order to define the lock codification, the rotor (2) including a transversally displaceable stop bar (9) cooperating with a longitudinal groove (10) of stator (1) and having projections susceptible of cooperating with notches of the locking pins (6) in order to immobilize the locking pins (6) when rotor (2) is made to rotate within stator (1) and the stop bar (9) comes out of said groove (10) and engages the locking pins (6), and comprising a change bar (11) which is transversally displaceable and is slidingly coupled with the key followers (4) in order to normally keeping the key followers (4) engaged with the locking pins (6) and to disengage the key followers (4) from the locking pins (6) when said change bar (11) comes into said groove (10) of stator (1) and provides a lock programming position, characterized in that one of the members (4,6), which compose at least some of the pairs each including a locking pin (6) and a key follower (4), are provided with two parallel and adjacent toothings (7a,7b), each toothing (7a,7b) having its pitch phase displaced with respect to the pitch phase of the other toothing (7b,7a), and in that at least one of said members (4,6), which compose the pair including a locking pin (6) and a key follower (4), has a limited mobility along the direction of the axis of rotor (2). whereby said member (4 or 6) is allowed to displace in such a way that the mutual engagement between the members (4,6) may take place into the one or the other of said two toothings (7a,7b) of one of the members (4,6) forming the pair.