The invention relates to the technical field of sofa seat cushions, and discloses a seat
cushion self-adaptive deformation structure of a damping sofa, the seat
cushion self-adaptive deformation structure comprises an outer sleeve
assembly, a fixing
assembly and a deformation
assembly, the fixing assembly is located on the outer side of the outer sleeve assembly, and the deformation assembly is located in the outer sleeve assembly; the memory
alloy wire can actively recover to the original shape after being heated, auxiliary support is provided for the spring, when a user leaves the seat
cushion, the memory
alloy wire can provide auxiliary resilience force for the spring,
fatigue damage of the spring is reduced, the spring is made of
aviation-grade
chromium-
vanadium alloy steel, accurate elastic performance and better
fatigue resistance are achieved, and the service life of the seat cushion is prolonged. Therefore, the seat cushion has good supporting performance and comfort in the using process, and can be accurately matched with the restoring action of the memory alloy wire, so that the service life of the spring is prolonged; and the hexagonal lock bolt and the cross-shaped lock bolt are screwed off, so that the seat cushion can be conveniently detached, and the replaceable effect of parts is realized.