| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a seating tool that can selectively create both of a state where a balance exercise of an erector spinae group is continuously carried out and a state of rest seating.SOLUTION: A seating tool comprises a main seat as an air sack capable of expansion and contraction by adjusting an internal air flow rate, and a second seat as a coating bag with a cushioning medium stored inside. The main seat is turnably connected with the second seat at the rear of the seat. When desired to hold a normal balance kinetic state, the second seat is turned behind and only the main seat is seated. When rest seating is desired, the main seat is turned behind and only the second seat is used. Also, the second seat is stacked and disposed on the main seat, and the seating by holding a moderate balance kinetic state is allowed while maintaining a neutral position of a spine. Cushioning materials of two or more having different materials, respectively, can be stacked and housed inside of the second seat, and thereby can selectively be used as a ventilation cushion in summer and an urethane surface in winter.</p> |
