The structure (1) e.g. backrest frame (2), has a plug-in type, flexible support unit (11) arranged at an edge facing a passenger, where the edge is chamfered with radius and is formed in arch-shape. The radius of the edge amounts to 0.2 to 0.05 of height o...

The vehicle seat back consists of two tubular uprights (12, 14) linked by a series of transverse strips made from rigid moulded parallelepiped blocks connected by non-stretch flexible elements that can be made in one piece with the blocks or fitted separat...

The seat back (1) has extrusion molded frame profiles (4) extending vertically and holding a pin (24) which can engage in a locking mechanism on the vehicle bodywork. The seat back pivots about an axis (22) at the bottom edge. A headrest (15) is mounted of...

The frame for a car seat back is U-shaped and is made up of hollow profiles. At least the arms (22, 24) of the U are made by internal high pressure forming and have the same bending strength.