Anchoring mechanism for vehicle seat

The mechanism has a flange comprising a recess and a lock (11) that is pivoted between locked and unlocked positions. A hook (12) of the lock is placed with respect to the recess and locks a rear anchoring wire (9) in the locked position. A concavity (15) of the lock is placed with respect to the recess and is supported on the wire in the unlocked position. A spring (18) exerts traction on the lock. A limit stop (19) is positioned such that the hook is located in the recess of the flange.