Patent ID: 7717511

Claim:
A chair assembly capable of being stacked vertically and horizontally, comprising a frame, a turnable seat assembled with the frame, as well as a backrest and armrests assembled with the frame; wherein the frame is comprised of two frontal supports and two rear supports; an assembling shaft horizontally disposed within the frame for holding and allowing the seat to be turned, a positioning rod disposed parallel to the assembling shaft for allowing the seat to be turned upward or downward and keeping the seat upturned or downturned; a chair resulted from combining the frame, the backrest, the armrests, and the turnable seat together may be stacked either vertically or horizontally; and wherein the seat and the assembling shaft ( 5 ) are assembled together via a seat turning mechanism ( 21 ) disposed underneath the seat; the seat turning mechanism includes a trough ( 211 ) therein for receiving the assembling shaft horizontally, and the seat turning mechanism also includes protruding stripes at an outer surface thereof; and wherein a distance between a center of the trough and an outer surface of each of the external protruding stripes in the seat turning mechanism is greater than a distance between a center of the assembling shaft and an outer surface of the positioning rod; wherein stacking blocks ( 7 , 8 ) are disposed at junctions between the frontal supports ( 11 ) and the rear supports ( 12 ) on both left and right sides of the frame; and wherein each of the stacking block disposed at near a junction between a respective frontal support and a respective rear support is rhombus-shaped, and each stacking block has a groove at a front upper side for receiving a respective frontal support and another groove at a rear upper side for receiving a respective rear support.