| 摘要 |
<p>The invention relates to an ergonomic back rest attachable to chairs for car drivers, used particularly for protecting the back and spine, comprising a metal framework (A) consisting of a rigid rectangular frame (2) made of wire, with some vertical sides (a) and some curved horizontal sides (b) on whose vertical sides (a) thee is woven a stringing (B) made of cbroad strip of cotton (1), arranged in the form of a row of horizontal parallel strips (g) with some spaces (h) therebetween that are greater or at least equal to the width (i) of the horizontal strips (g) and which pass behind the frame (2) in a diagonal arrangement, only on a central zone (j) between two vertical strips (7), said strips having the same shape and the same material as the horizontal strips (g) to which they are sewn or stapled in some intersection zones (k), the stringing (B) being tensioned by passing and drawing an end (m) of the vertical strips (7), under the lower horizontal side of the frame (2) and by attaching the end to the lowest bracing (5) of the frame, through an attachment system known per se, not represented in the figure.</p> |
