Anti-theft device for a steering column and associated steering column

An antitheft device for a steering column of a motor vehicle, said antitheft device comprising:

• a bolt mounted with the ability to affect translational movement in said antitheft device between a position in which the steering column is locked and a position in which said column is free;
• a control means for controlling the movement of said bolt;
• and
• a drive means connecting the control means and the bolt and configured to drive the translational movement of the bolt, wherein
• said drive means comprises a housing that accommodates at least part of a blocking element if the blocking element is in a rest position and in an active position,
• said blocking element is configured to engage with the control means to come into the active position to block the drive means if the bolt is in the locking position,
• said drive means comprises a first part that is intended to engage with the blocking element and a second part configured to drive the translational movement of the bolt when the control means is turned,
• the control means comprises an orifice that accepts a free end of the blocking element,
• the orifice is delimited by a sloping wall that forms a ramp for guiding an end, and
• wherein the orifice has circular or oval shape.