| 摘要 |
A sitting device, adapted to be used in two different sitting postures comprising a main frame, a seat pivotally mounted on said main frame and a separate knee support, which is pivotally mounted in one end each of a pair of supporting arms, which have their other ends pivotally mounted in links of a link system, said links being arranged in pairs and attached to the frame of the sitting device pivotable in a vertical plane, one pair of the links being prolonged by an arm, which extends between the frame and the seat. |
