抄録
In this paper we had proposed a new care bed. The most significant characteristic is that the bed uses non-linear spring mattress. Most of cot cases cannot toss about in bed that a physically unimpaired person can naturally do. It is a main cause of bedsore that a cot case keeps the same posture in bed without tossing about. For preventing a bedsore, the most of cot cases are changed their posture by using caretaker's hand every two hours. The advanced care bed and the air mattress equipped with a postural change function begin to be used for reducing the stress of the caretakers. NLS mattress can adjust the hardness of bed surface partially. Furthermore, by applying the function, NLS mattress can help the postural change operation.
