The chair is partic. intended for the operator of a visual data display unit. It comprises a base column (F) carrying a swivel seat (S) and a back rest (R) pivotable about a transverse axis relative to the seat and coupled to this via a spring element, such as a pneumatic spring. The seat (S) frame (5) has pivoted (8,9) links (7,11) at the rear whose other ends are pivoted (12,13) totheframe (20,15) of the back rest. This arrangement provides correct body balance in the normal working position, relaxed position, and forward-leaning operating position.
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