Combination spring for bed, chair or sofa; has spring elements fitted in upper frame with planar wave-shaped springs fastened to them and has evenly spaced lower frame

摘要

The combination spring has spring elements (10) fitted in an upper frame (1), with planar wave-shaped springs (5) fastened to them. The upper frame has two longitudinal parts and transverse parts connected at their ends. A lower frame (9) is evenly spaced (8) from the upper frame and undetachably arranged, so that the overlaid spring path produces a softer spring-action.