| 摘要 |
<p>The invention relates to a seat backrest comprising a rigid frame (25) supporting a contourable portion constituted by a covering upholstery layer (26) and at least one elastomeric layer (27) interposed between the covering upholstery layer (26) and the frame; and resilient means (24) between the frame (25) and the elastomeric layer (27) to impart a curvature to the covering upholstery layer (26) and the elastomeric layer (27) to produce a desired contour at least in the lumbar region. The resilient means (24) is located in a cavity (24) in a portion of the elastomeric layer (27) facing the frame, and that the resilient means (24) comprises at least one pocketed spring assembly (30), each spring assembly comprising at least one continuous coiled spring member, each said continuous spring member being enclosed in a covering material (31, 32) and extending between opposing sides of the cavity (24).</p> |
