| 摘要 |
<p>The seat back frame (7) is composed of two uprights (8,9) pivoted to the seat frame (3) about a first transverse horizontal spindle (36), allowing various comfort positions. The back is also pivoted about a second parallel spindle enabling its folding down onto the seat. For each upright, pivoting relative to the seat frame is carried out by a lever (30). This lever has, above its rotating part on the first spindle, a rectangular section tenon (30b) which fits in a central housing (20) in the corresponding upright. The second pivot spindle (38) is carried by the tenon and engages in a plate (32) which, located against the lever, is encased in the section housing to which it is riveted. This plate has a lower end passing beyond the upright and teeth (42) which mesh with complementary teeth (43) carried by a mechanism (33,34) wedging the upright relative to the lever.</p> |
