| 摘要 |
A seat back structure consisting of a supporting frame and a unitary seating back unit mounted on the frame. The seating back unit consists of a molded foam body of seat back shape having a spring assembly embedded therein. The spring assembly includes a plurality of linear springs which yieldably resist seating loads and a border wire on which the linear springs are mounted. Rearwardly extending projections on the foam body engage the frame so as to provide a space into which the linear springs can deflect when subjected to seating loads. The spring assembly is shaped to conform to the seat back shape of the foam body and cooperates with the foam body to provide added stiffness in the lower back area of the seat occupant.
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