| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a vibration device which constantly keeps strength of vibration to a steady value regardless of the weight of a person who is lying on a mat or the weight of the mat, bottom mattress or the like, gives the person lying in bed no uncomfortableness, promotes the blood flow of decubitus bedsore regions, and suppresses generation of active oxygen. <P>SOLUTION: A lamination which is formed by stacking a hard plate 1 and an elastic plate 2 is provided with a vibration generator 3. The vibration generator 3 displaces the hard plate 1 in one direction in its plane and is provided with a vibration detector 11 for detecting a change in strength of the vibration according to change in weight on the laminate. The strength of vibration detected by the vibration detector 11 is compared to the vibration strength set by an operation panel vibration strength setting device 17 by a feedback control calculator 14. Vibration signal is controlled so that the difference is 0 and the maximum value of the vibration strength of the vibration generator 3 is kept to a steady value. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
