| 摘要 |
Provided is a two-sectional ergonomic chair backrest comprising a vertical backrest support, an upper back unit releasably secured to the backrest support, a waist unit including a front waist member, an intermediate frame, and a rear plate releasably secured to the backrest support, and a bent, resilient connecting member including a lower portion releasably secured to the waist member and the frame, and an upper portion releasably secured to the backrest support such that in response to the waist of a seated person urged against the waist unit, the connecting member is elastically deformed so as to provide a great degree of comfort to the waist.
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