Retractable device for enabling a motor vehicle seat to slide

A device for enabling a motor vehicle seat to slide, said device comprising:

• a runner comprising a stationary rail designed to be fastened to the structure of the vehicle and a moving rail mounted to slide relative to the stationary rail;
• a locking device having an active state in which it holds the moving rail stationary relative to the stationary rail and an inactive state in which it allows the moving rail to slide relative to the stationary rail;
• a control support mounted to pivot on the moving rail between an active position in which it constrains the locking device to be in its inactive state and a rest position in which it allows the locking device to return to its active state;
• a control rod mounted to pivot on the control support between an in-use position and a retracted position, the control rod pivoting in an actuation direction from its in-use position causing the control support to pivot towards its active position, and the control rod pivoting in a retraction direction opposite from the actuation direction allowing the control support to return to its rest position, and causing the control rod to move from its in-use position towards its retracted position;
• and
• a torsion spring having a first end coupled to the moving rail, a second end coupled to the control rod, and an intermediate portion coupled to the control support, said spring tending to bring the control rod into the in-use position and tending to bring the control support into the rest position.