| 摘要 |
A structure of a lumbar support portion of a seat back of an automotive seat is disclosed. In a cushion member formed of foam material or in the portion thereof corresponding to the lumbar support portion, there is provided a block member embedded when the cushion member is formed by a mold. The block member comprises an impreganted portion where a foam solution for forming the cushion member is impregnated when the cushion member is foamed and is hardened afterwards, and a soft non-impregnated portion where the cushion member forming foam solution is not impregnated. A body pressure distribution is obtained in which the pressure in the impregnated portion is the greatest and the remaining pressures existing upwardly and downwardly of the greatest pressure are gradually decreased as they recede from the impregnated portion, resulting in the improved tuning of the seat. |
