Research on the comfort of human upper back in different seat back angles

Abstract

This study aimed to investigate the effect of upper seat back in different vertical angles (5°, 10°, 15°, and 20°) on upper back support. The upper seat back was taken as an independent component in experimental facility, so that it could move and rotate in vertical angle relative to seat back of waist. Experimental results showed that comfort sensations in upper back could be perfectly measured by body pressure-measuring parameters and subjective comfort evaluation indicators. Proper leaning of slightly vertical angle upper back support would improve the whole sitting comfort compared with normal chairs.