| 摘要 |
FIELD: transport.SUBSTANCE: seat comprises cushion and backrest. Seat cushion features stiffness distribution in direction from the front to rear so that cushion front part comprises lower stiffness area, more flexible than cushion rear part, an area of higher stiffness. Seat backrest features distribution of stiffness of various properties of forces in backrest vertical direction so that low stiffness area of minor passenger reaction force is set at vertical central fragment of seat backrest. Note here that high stiffness areas of major passenger reaction force are set nearby low stiffness area at backrest top and bottom fragments. Backrest support surface can flex at the centre of low stiffness area at whatever flexure angles at the centre in compliance with the load to passenger back support.EFFECT: comfortable boarding.28 cl, 38 dwg |
