| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent a mattress from shifting in a foot direction when raising the back of a bed, to simultaneously prevent the generation of unpleasant abnormal sound when the upper half side of the mattress is shifted upwards when raising the back and to smoothly shift it. <P>SOLUTION: In the bed 1 in which the back of the mattress mounted on the upper surface of the bed 1 can be raised together with the bed 1, a sheet member 22 of a high frictional coefficient is spread between the back surface of the mattress and the upper surface of the bed 1 at a part corresponding to the buttocks of a person lying on the mattress, and slide resistance force is increased for slide between the back surface of the mattress and the upper surface of the bed 1 corresponding to a back raising part at the part where the sheet member 22 is spread. <P>COPYRIGHT: (C)2009,JPO&INPIT |
