| 摘要 |
In the case of a backrest ( 1 ), in particular for an office chair, having a lordosis support ( 3 ) comprising supporting ribs ( 2 ) arranged in a manner such that they run parallel to one another, said supporting ribs are precurved in a flexurally elastic manner in their starting position. An adjusting element ( 9 ), which can be actuated via an adjusting member ( 6 ) and is intended for setting the lordosis curvature ( 18 ), is guided on the curvature side ( 12 ) of the lordosis support ( 3 ) in such a manner that the lordosis curvature ( 18 ) decreases during a tensile loading of the adjusting element ( 9 ).
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