Patent ID: 7152923

Claim:
Vehicle seat comprising: a cushion intended to be connected to a floor of the vehicle by slide rails, a backrest mounted to pivot with respect to the cushion about a single horizontal pivot axis between a folded-flat position in which the backrest runs roughly horizontally parallel to the cushion and a plurality of comfort position in which the backrest extends roughly vertically and allows its user to sit in the seat, this comfort position lying in a range extending angularly between a rear erect position and a forward erect position of the backrest, the backrest being roughly perpendicular to the cushion when in the forward erect position, the backrest being at an obtuse angle with respect to the cushion when in the rear erect position, a mechanism for controlling the pivoting of the backrest about said pivot axis with respect to the cushion comprising an articulation that can be actuated between an unlocked state that allows the backrest to rotate freely with respect to the cushion about the pivot axis and a locked state in which the rotation of the backrest with respect to the cushion is blocked in one of the plurality of comfort positions, this mechanism being designed to perform the three functions consisting in: commanding the articulation to adjust the backrest into one of the plurality of the comfort positions, by rotating the backrest about said pivot axis within said range extending between the rear erect position and the forward erect position, commanding a tilting of the backrest by rotating it about said pivot axis towards the folded-flat position, and commanding a tilting of the backrest by rotating it about said pivot axis into an intermediate folded-down position between one of the adjusted comfort positions and the folded-flat position, the backrest pivoting between the folded-flat position, the intermediate folded-down position, and each of the plurality of comfort positions about the single pivot connecting the backrest to the cushion, no other pivots being provided between the backrest and the cushion to allow for such movement therebetween, at least two control members separate from one another and acting on the control mechanism so as each to activate at least one of the three aforementioned functions, and a blocking mechanism itself comprising: a rotary member, secured to a first seat element chosen from the backrest and the cushion, and a blocking member, actuated by a transmission member and mounted to move on a second seat element, chosen from the cushion and the backrest, different from the one to which the rotary member is secured, the blocking member being movable between, on the one hand, an active position in which it comes into contact with a first stop of the rotary member when the backrest is in the intermediate folded-down position, preventing the backrest from pivoting towards its folded-flat position and, on the other hand, a retracted position in which it no longer interferes with the first stop, the blocking member being urged elastically towards its active position.