Seating Furniture, More Especially Office Swivel Chair
(57) Abstract
A chair comprises a seat and a backrest support which are mounted on a support member, the backrest support being pivotal about a horizontal pivot axis, and an energy accumulator which is tensioned when the seat is subjected to a load and acts on the backrest support, the energy accumulator engaging the backrest support at an effective distance from the pivot axis. To improve the efficiency of such a mechanism, the energy accumulator is connected on the one side to the support member and one the other side via a transverse connector to the backrest support. With the mechanism the energy accumulator is subject to a load substantially by the rear region of the seat and thus substantially by the complete weight of a person sitting on the seat. In an alternative embodiment the seat comprises an elastic cover which on the one side is clamped in the support member and on the other side is connected to the backrest support, the elastic cover serving as energy accumulator. According to a further alternative the seat comprises a flexible cover which is connected on the one side to the energy accumulator and on the other side to the backrest support.
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