摘要 |
<p>A chair, particularly an office chair, comprising a seat part (2) and a back part (3) which can be adjusted in relation to the seat part, where the back part is equipped with a back support in the form of a fluid containing cushion device (4) where fluid by exerting pressure against an upper part of the cushion device is transferred to a lower part of same so that the lower part expands and provides support for the lower spine of a person (8) leaning backwards on the chair (1). The cushion device (4) comprises one only, upper air cushion (5) and at least one lower air cushion (6) where the upper and lower air cushions are connected via a channel (7) equipped with a valve device (9) for control regulation of the air transfer between the cushions (5, 6).</p> |