Anti-theft device for a motor vehicle steering column

An anti-theft device for a motor vehicle steering column, comprising:

• a locking means mounted in a movable manner between an unlocked position in which the locking means is intended to be disposed away from the steering column and a locked position in which the locking means is intended to prevent said steering column from moving;
• and
• a cam intended to rotate as one with a lock plug to actuate the locking means depending on the position of the lock plug, wherein the cam comprises:
• a non-return profile intended to engage with a complementary assembly member that is configured to prevent the cam from rotating in an opposite direction once the cam has reached a first predetermined angular position,
• a push-locking recess comprising an opening extending in a radial direction that receives a stop that is configured to engage with the complementary assembly member that is configured to prevent the cam from rotating in a predetermined direction of rotation from a second predefined angular position and to allow rotation of the cam by the lock plug being pushed in beforehand,
• wherein the stop housed in the push-locking recess engages with the complementary assembly member to prevent the cam from rotating in the anti-clockwise direction of rotation from an intermediary position.