TENSION STRUCTURE OF SEAT BACK

摘要

A tension structure for forming the seat back of a car seat, comprising coiled springs 3a, 3b, 4a, and 4b as tension members across the upper parts and intermediate parts of the side frame parts 11 and 12 of a seat back frame 1 and the vertical rail bars 20 and 21 of a tension assembly 2, wherein straight wires 5a and 5b having one wire ends fixed around the axes of the vertical rail bars 20 and 21 and the other wire ends fixedly inserted into the retaining rings 14 and 15 of the side frame parts 11 and 12 are installed on the lower parts of the side frame parts 11 and 12, whereby a seating posture can be stabilized by increasing the support pressure of a waste part supported by the tension assembly 2 with the straight wires 5a and 5b.