| 摘要 |
A seat assembly providing adjustable lumbar support comprises a resiliently extensible transverse belt (4) the ends of which are linked to lever elements (3) that are fixed to rotatable adjusting pulleys (5). One of the pulleys (5) is directly linked to an adjusting mechanism (7) and the two pulleys (5) are linked together by means of a cable (6) in such a manner that rotation of the one pulley (5) in one direction, causes rotation of the other pulley (5) in the opposite direction. The transverse belt (4) is supplemented by conventional means, not shown, for supporting upholstery that is arranged over the seat frame (1, fig. 1) in conventional manner. Adjustable tensioning of the belt (4) enables the degree of support provided to the upholstery of the seat to be adjusted in the lumbar region. |
