Adjustment structure of concave condition circular arc convex circular arc of chair

摘要

Problem to be solved: to make the backrest and the seat to be an arc of an appropriate bend suitable for the human body engineering, and to increase the comfortable feeling when sitting.An elastic panel 21, a motor 22, a worm 23, a gear 24, a link 25 and a controller 26 are provided. The link 25 has a fixed hole 251 at the upper end of the positioning hole 251 of the elastic panel 21 fitted to the eccentric convex column 241 of the gear 24. The controller 26 is operated to drive the motor 22 to rotate the gear 24 through the worm 23. As a result, the lower end of the link 25 is displaced downward, and the lower end of the link 25 is pulled to bend the elastic panel 21 in an arc shape.