Parameter optimization design of the linkage structure of office chair

XIE Wei1, QING Baorong1, ZENG Jian1, WANG Zhengxing2, YU Pengfei2

(1.Key Laboratory of E&M, Ministry of Education&Zhejiang Province, Zhejiang University of Technology,
Hangzhou 310014, China; 2.Zhejiang Henglin Chair Industry Co.,Ltd., Anji 313300, China)

Abstract: Aiming at analyzing of the phenomenon of “back rub” in the process of the chair linkage, the condition of achieving the “zero back rub” of the office chair was obtained. The parametric modeling of the linkage mechanism of the office chair was carried out on ADAMS/View to realization the performance of “zero back rub” in the process of linkage. and connections between point1 with point3 and point2 with point3 was established. The point1 is both on the back of the chair and on the back of people. The point2 is both on the back of the chair and on the waist of people. The point3 is both on the board of seat and on the hips of people. In the process of linkage, the line length is the known standard value, and the influence degree of many variables on the objective function was analyzed, and the main design variables were determined. The normalized weighting method was used to optimize and validate. The optimization results show that in the process of linkage, the chair achieves the target of “zero rub back” and the comfort of the office chair was increased.

Key words: office chair; seat plate linkage; multiobjective parameter optimization; ADAMS