Patent ID: 6921134
Filing Date: 2005-07-26
Classification: A47C

Abstract:
1. An apparatus for adjusting inclination of chair backs, comprising: a base pivotally coupled to a middle of a chassis; a plurality of latch grooves disposed at a bottom at a rear side of said chassis; a positioning plate disposed at a top surface at a rear end of said base for being slid back and forth, with an extended front end of said positioning plate being extended into one of the said latch grooves; a control rod having a middle predetermined position pivotally coupled to said base, with an end section of said control rod being freely swung; and a rod body disposed on said positioning plate and pivotally coupled to a free rotary resilient component having first and second resilient legs, with the first resilient leg being coupled to an end of said control rod, and the second resilient leg being hooked into a bolt disposed on said positioning plate; thereby when said control rod being pushed to swing said end section back and forth produces a rotary prestressing force by said resilient component to move the positioning plate to selectively embed into and withdraw from one of said latch grooves disposed at the rear side of said chassis.