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.COPYRIGHT: (C)2015,JPO&INPIT【課題】背上げ時や停電時に臀部・体幹部の底着き防ぎ、「圧切替」機能に加えて「圧力の再分配」が可能なエアマットレスを提供すること。【解決手段】細長い袋状のフィルムからなるエアセル10を上下方向にそれぞれ独立した三層3気室11,12,13構造に形成して該エアセルを複数本並設させたエアマットレス100であって、各エアセルの上層部を複数系統に分けて各系統ごとに交互に所定の周期で膨張・収縮を繰り返すようにエアを供給・排気する波動領域とし、また各エアセルの中層部12をAゾーン、Bゾーン、Cゾーンに分けて、Aゾーンを利用者の骨盤部に、Bゾーンを背部に、Cゾーンをそれ以外の部位に対応させ、その内圧をA>B≧Cとするとともに、各エアセル下層部13はそれぞれ常時一定の内圧とした。【選択図】図1
