FRAME STRUCTURE FOR A VEHICLE SEAT BACKREST

A frame structure () for a vehicle seat backrest (), said frame structure () comprising a centre frame () and a side frame (), said centre frame () and said side frame () extending in a longitudinal (x), transversal (y) and vertical (z) direction, respectively, said longitudinal (x), transversal (y) and vertical (z) directions being perpendicular to each other and corresponding to a longitudinal, transversal and vertical direction, respectively, of a vehicle. Said frame structure () further comprises a lower connection () which is adapted to interconnect said centre frame () and said side frame () and which is located at or adjacent to a lower end of said frame structure () in said vertical direction (z).