Method for manufacturing different backrests of motor vehicle rear seats and a set backrests produced according to this method

摘要

A set of different backrests of motor vehicle rear seats is manufactured with standardized characteristics; each backrest (2,3) has a support structure (4) defined by a plate and a frame (9) fixed onto a front surface of the plate (8); the frame (9) is defined by a tube extending along a ring-shaped path and has an upper horizontal crossbar, a lower horizontal crossbar and two uprights arranged at the sides; each backrest also has a plurality of components fastened to the frame (9), a padding secured to the support structure and a cover that upholsters the padding; the shape and external dimensions of the cross-section are the same for different frames belonging to different backrests; the shape and external dimensions of at least one of the two uprights are the same for the different frames; the different frames have the same height distance between the upper horizontal crossbar and the lower horizontal crossbar; possible differences in height between the different backrests are due to different heights of the padding above the upper horizontal crossbar and/or below the lower horizontal crossbar.