Vehicle seat

A vehicle seat, especially for automotive vehicle, comprising:

• a seat-bottom frame;
• a seatback frame comprising at least one first lateral riser, where said lateral riser is mounted pivoting relative to said seat-bottom frame around a transverse axis;
• a first discontinuous type hinge mechanism interposed between the seat-bottom frame and the seatback frame with a first side-plate rigidly fixed to the seat-bottom frame and a second side-plate;
• wherein the seatback frame comprises an intermediate riser mounted on the seat bottom frame, pivoting around the transverse axis, by means of the first hinge mechanism in order to allow an adjustment of an angular position of the seatback frame relative to the seat bottom frame around the transverse axis;
• where the intermediate riser and the second side-plate of the first hinge mechanism are securely connected in rotation around the transverse axis;
• where the intermediate riser is fixed to the first lateral riser at a distance from the transverse axis;
• and
• where the intermediate riser has a stiffness less than the stiffness of the first lateral riser of the seatback frame, said stiffness being considered in response to the application of a torque around the transverse axis.