Patent ID: 8454049

Claim:
A high chair, including: a foldable support frame, having a pair of rail struts and a pair of backup struts, the pair of backup struts being pivoted to the pair of rail struts and releasably locked in a use position by a spring-biased coupling sleeve; wherein the pair of rail struts are formed with a plurality of positioning holes for engaging with the locking elements, and each of the locking elements is biased by a spring to engage in one of the positioning holes for releasably locking the chair at a selected height; a chair, having at least a top portion and a pair of sliding sleeves; the sliding sleeves being capable of sliding alone the pair of rail struts downward from a use position, until the top portion being lower than twenty-eight (28) inches above ground, so as to hide the chair under a dining table without folding and taking the foldable support frame away from the dining table; and a pair of positioning mechanism, mounted on the chair and associated with a pair of locking elements mounted in the sliding sleeves for releasably locking the sliding sleeves relative to the pair of rail struts, so as to adjust and fix the chair at a selected height; wherein the positioning mechanism includes a pair of driving triggers associated with the locking elements, for disengaging the locking elements from the positioning holes so as to adjust the chair to another selected position, and wherein the positioning mechanism farther includes a pair of linking element connected between the driving triggers and the locking elements.