Backrest for chair used in office, has supporting surface portions that are arranged laterally at specific distance from each other and are directed upwards to subsequent region

摘要

The backrest (2) has a one-piece lower supporting surface (4) that is adjacent to a seat portion for supporting the lumbar vertebra column or the lumbar region of a person sitting on a chair (1). Two supporting surface portions are arranged laterally at specific distance from each other. The supporting surface portions are directed upwards to a subsequent region.