公开(公告)号：US20210169235A1

公开(公告)日：2021-06-10

申请号：US16760924

申请日：2018-10-23

申请人： IKEA Supply AG

发明人： Sebastian SVENSSON

IPC分类号： A47C31/02 ,  A47C4/30 ,  A47C7/22

摘要： A seating furniture support arrangement (6) for a seat or a backrest, suitable, e.g., for a sofa, comprises a first (8) and a second (10; 12) load-carrying longitudinal beam, each being mountable to a seating furniture frame comprising one or more parts; an elastic sheet (16; 14); and a mechanism for stretching the elastic sheet (16; 14) between the first longitudinal beam (8) and the second longitudinal beam (10; 12). The mechanism comprises a first longitudinal beam (8) pivotable on the frame. The elastic sheet (16; 14), with the said seating furniture support arrangement (6) in installed position, is connected to the first longitudinal beam (8) in such a way that the first longitudinal beam (8) pivoting with respect to the frame, in response to an application of an external force or torque, stretches the elastic sheet (16; 14), the external force or torque working against the tension force of the elastic sheet (16; 14) until a point of maximum tension is reached, past which point of maximum tension the tension force facilitates further pivoting of said first longitudinal beam (8), acting to keep the first longitudinal beam (8) in place in a final position.