| 摘要 |
he invention relates to vibrators propelled, at will, into seat cushions with the use of the fluctuating air volume of an air chamber encountered at the rear part of the cushion which is inflated of deflated by an air pump in such a way that vibration can be particularly felt at the waist region. Seat cushion with adjustable air chamber at the rear part thereof, air pump-regulated cushion-air chamber. The use of said device presents simultaneously or separately the following characteristics: it massages the waist, warns the user about the wrong posture of his body and incites him to change the body position. |
