| 摘要 |
A rotating back chair is provided, which gives pressure effect to a user by using the horizontal protrusion and prickle protrusion and keeps correct posture. A rotating back chair comprises: a seat plate portion; a bracket fixed to the combined support stand(30); and an axis of rotation(50) combined with the oval shape groove part located in the spring pipe(60). The rotation backing plate combined with the axis of rotation is selected one shape among circular shape, asymmetry ellipse, asymmetry circular shape, asymmetry peanut, dolphin, fender, fur seal, kidney, and liver. The rotation backing plate comprises: a lumbar vertebrae support(90), a thoracic vertebra support, and a cervical vertebra support. |
