A chair includes a base having a control assembly operably supporting a seat assembly and also a back assembly for movement about a seat tilt axis and a back tilt axis, respectively. The back assembly includes a flexible sheet supported at upper/outer corners by a back support structure and hanging downwardly. The flexible sheet includes a lower portion coupled to the back support structure by a tensioner for holding the lower portion rearwardly. A vertically-adjustable lumbar mechanism is adjustably supported on the back support structure and operably engages the flexible sheet for flexing a lumbar area of the flexible sheet forwardly to provide an optimal ergonomic horizontal and vertical convex shape for postural lumbar support.
申请公布号
EP1191863(A4)
申请公布日期
2004.06.09
申请号
EP20000937886
申请日期
2000.05.25
申请人
STEELCASE INC.
发明人
BALL, DOUGLAS, C.;GOLDICK, LEON;DESLAURIERS, ALAIN;SOKALSKI, JEFF, G.