CAR SEAT WITH RIGID BACKREST

1 . Child car seat comprising a seat base and a seat back

characterised in that the seat back has a rigid seat back structure of which the width at its top is less than the width of its base, a lower portion of the seat back structure being recessed between lateral uprights, the lower portion extending over a height that represents between one-third and two-thirds of the total height of the seat back structure and an upper portion of the seat back structure having two holes for passing a harness strap.

2 . Car seat according to claim 1 , characterised in that the seat back structure has the general shape of an A, of which the lateral uprights come close to one another, from the base of the seat back to its upper end.

3 . Car seat according to any of claims 1 and 2 , characterised in that the upper portion extends over a height that represents between one-third and two-thirds of a total height of the seat back.

4 . Car seat according to claim 1 , characterised in that the rigid seat back structure is formed from two lateral units, each comprising one of the lateral uprights and one of the holes for passing a harness strap, made integral by at least one reinforcing element.

5 . Car seat according to claim 4 , characterised in that the rigid seat back structure comprises two reinforcing elements, respectively at an upper end and at a lower end of the upper portion.

6 . Car seat according to any of claims 4 and 5 , characterised in that at least one of the reinforcing elements guide and/or retain a fastening strap, allowing for the attaching of an upper portion of the seat back with an anchoring point provided for this purpose in a vehicle.

7 . Car seat according to claim 1 , characterised in that each one of the lateral uprights carries, at its lower end, an anchoring element of one of the harness straps.

8 . Car seat according to claim 1 , characterised in that the seat base has a rigid seat base structure in the general shape of an A, of which the lateral edges come close to one another, from its proximal end, close to the seat back to its distal end, arranged to extend away from the seat back

9 . Car seat according to claim 8 , characterised in that the rigid seat base structure defines a substantially triangular shape, recessed inside, with the distal end defining a zone for anchoring a crotch support and/or a top-tether strap idler.

10 . Car seat according to any of claims 8 and 9 , characterised in that the proximal end of the rigid seat base structure is included between the lower ends of the lateral edges of the rigid seat back structure.

11 . Car seat according to claim 1 , characterised in that the rigid seat back structure and/or rigid seat base structure is made at least in part from stamped sheet metal.

12 . Car seat according to claim 1 , characterised in that the seat base and the seat back can have a folded position, in which the seat base is brought back against the seat back in order to form a compact unit, and an unfolded position, in which a child can be installed in said seat.

13 . Car seat according to claim 12 , characterised in that the proximal end of the rigid seat base structure is mounted on an axis extending between the lower ends of the lateral edges of the rigid seat back structure.

14 . Car seat according to claim 1 , characterised in that two clips for connecting to locations provided for this purpose in the vehicle are movably mounted in rotation at the base of the seat back independently of one another.

15 . Car seat according to claim 1 , characterised in that two clips (for connecting to locations provided for this purpose in the vehicle are movably mounted at the base of the seat back between a deployed position, allowing said connection, and a storage position, in a housing provided for this purpose in the seat back.