| 摘要 |
PROBLEM TO BE SOLVED: To provide an air mattress capable of preventing a hip and a body stem from reaching the bottom at a back raising time or at an electric outage and capable of performing "redistribution of pressure" in addition to a "pressure changeover" function.SOLUTION: An air mattress 100 is formed by making an air cell 10 of a long bag-shaped films into a structure of three-layer three-air chambers 11, 12, and 13 vertically independent of one another and arranging a plurality of the air cell 10 in parallel. Each air cell 10 has its upper layer part divided into a plurality of systems to form a wave motion area to feed/discharge air so that the individual systems repeat expansion-shrinkage alternately with a predetermined period. Moreover, the middle layer part 12 of each air cell is divided into an A zone, a B zone, and a C zone so that the A zone corresponds to the pelvic part of a user, the B zone corresponds to the back part, and the C zone corresponds to the other parts, and so that the internal pressures are set at A>B≥C. The internal pressure of the individual air cell lower layers 13 is always set at a constant. |
