Patent ID: 8128173

Claim:
A chair, comprising: a backrest frame; an armrest frame detachably mounted on the backrest frame; a seat frame detachably mounted between the backrest frame and the armrest frame; wherein the armrest frame includes two side support racks each detachably mounted on the backrest frame; each of the two side support racks of the armrest frame has a first section detachably mounted on the backrest frame and a second section which is perpendicular to the first section and detachably connected with the seat frame; the first section of each of the two side support racks has an end face provided with a screw bore; the backrest frame is provided with two fixing holes each aligning with the screw bore of the respective side support rack; the chair further comprises two threaded fastening knobs each initially extending through a respective one of the fixing holes of the backrest frame and each then screwed into the screw bore of the respective side support rack so that the first section of each of the two side support racks is releasably locked onto the backrest frame; the second section of each of the two side support racks has an inner side provided with a fixing block which protrudes outward from each of the two side support racks; the backrest frame has a front side provided with two positioning blocks each of which protrudes outward from the front side of the backrest frame; the seat frame has four corners supported by the fixing block of each of the two side support racks and the two positioning blocks of the backrest frame; the seat frame has a bottom provided with four threaded tubes inserted into the fixing blocks of the two side support racks and the two positioning blocks of the backrest frame respectively; the chair further comprises four threaded locking knobs screwed into the threaded tubes of the seat frame respectively and abutting the fixing blocks of the two side support racks and the two positioning blocks of the backrest frame respectively so that the seat frame is releasably locked onto the fixing blocks of the two side support racks and the two positioning blocks of the backrest frame; the fixing block of each of the two side support racks is provided with a fixing hole; each of the positioning blocks of the backrest frame is provided with a positioning hole; the threaded tubes of the seat frame are fixed in the fixing holes of the fixing blocks and the positioning holes of the positioning respectively.