Patent ID: 6517156
Filing Date: 2003-02-11
Classification: A47C

Abstract:
A chair comprising:a base; a backrest; a seat including a rear end pivotally connected to a lower end of said backrest; two armrests securely mounted to the base, each said armrest including a front end pivotally connected to said seat and a rear end pivotally connected to said backrest; and a waist rest including a waist rest body, two connecting pieces, and two linkages each having a first end and a second end, said waist rest body including an arcuate resting portion on an upper end thereof and a lower arcuate resting portion on a lower end thereof, each said connecting piece including a first peg for pivotal connection with said rear end of an associated one of said armrests, each said connecting piece further including a second peg for pivotal connection with said first end of an associated one of said linkages, said second end of each said linkage being pivotally connected to said seat; wherein when a user lies down on said backrest, said seat is moved forward while said linkages and said waist rest are pivoted such that said upper arcuate resting portion of said waist rest pivots inward and that said lower arcuate resting portion of said waist rest pivots outward, causing a jointing area between said lower end of said backrest and said seat to protrude more outward to increase the supporting effect and thus provide an increased comfort.