TENSION STRUCTURE OF SEAT BACK

摘要

A tension structure for forming the seat back of a car seat, comprising coil ed 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).