| 摘要 |
PURPOSE:To eliminate the deformation of the waist by correcting the backbone in a correct state by automatically performing motion to bend the waist in the forward/ backward or rightward/leftward direction or twist it in the rightward/leftward direction by performing the reciprocal linear motion or reciprocal turning motion in the forward/ backward or rightward/leftward direction of the seat of a chair. CONSTITUTION:When a reduction motor 5 is started up, a crank pin 7 pulls a crack rod 8 by the rotation of a crank arm 6, and a seat main body 1a can be moved via an operating pin 9 during one revolution of the crank arm 6. The seat main body 1a is reciprocated by supporting a reciprocal guide 2 which supports the main body with a bearing 4. Therefore, when a person sits on the chair facing the direction of 90 deg. against the reciprocal moving direction of the main body 1a, the waist can be rocked in the rightward/leftward direction, and also, when the person sits on the chair facing in the direction conforming to the reciprocal moving direction, the waist can be rocked in the forward/backward direction. In this way, it follows that the regular and appropriate bending motion of the backbone of the waist can be performed, and the backbone can be restored in a normal state, which eliminates the deformation of the waist. |
