| 摘要 |
The chair has a seat (7) provided with a vertically movable part which is returned to its raised position by a resilient leaf spring (10). The spring also senses the weight of a seated person. A backrest support structure (4) is movable relative to a fixed base structure (3) of the chair. The support structure is biased towards a first operative position by a resilient cartridge (23). The load of the cartridge is adjusted automatically in dependence on the user's weight sensed by the spring, this weight acting to aid in moving the support structure to a second operative position. |
