Anti-theft for a steering column of a motor vehicle

A lock for a steering column anti-theft device of a motor vehicle comprising:

• a stator comprising a stator head having an opening;
• a rotor movably mounted in rotation relative to the stator about an axis, the rotor comprising an annular collar having an extension;
• a cam rotatably secured to the rotor;
• and
• an elastic element arranged between the cam and the rotor;
• wherein the opening of the stator is shaped so that its cooperation with the annular collar blocks rotation of the rotor in a predetermined direction of rotation from a predetermined angular position and enables rotation of the rotor beyond the predetermined angular position by prior pressing of the rotor;
• wherein the extension of the annular collar extends axially toward the head of the rotor to receive an insert over a first angular sector, and
• wherein the opening of the stator includes a clearance for enabling passage of the extension of the annular collar, the clearance extending radially outward of the opening of the stator over a second angular sector and being shaped so that its cooperation with the annular collar axially retains the rotor in the head of the stator.