| 摘要 |
Back support cushion 30 that comprises first 31 and second 32 generally planar main surfaces and having top 36, bottom 35 and first 33 and second 34 side surfaces; wherein the first main surface 31 has a profile of one half of a teardrop (or pear) section, having a curvilinear apex positioned between 50 and 90mm from the bottom surface of the cushion. The cushion is formed from first (38, Fig 4) and second (39, Fig 4) regions, wherein the material of the first region (38) or teardrop section being a conformable material having an hardness value in the range of 175 265lbs and the material of the second region (39) providing lateral rigidity to the cushion and having an hardness value in the range of 175 265lbs and density of 35 120Kgm-3. The cushion may be made from polyurethane memory foam and can include a rigid plastic, wooden or metallic insert within the second region (39). |
