US Patent 6840574 Foldable chair assembly

A foldable chair assembly includes a foldable frame, and a positioning unit. The foldable frame includes two auxiliary bars pivotally connected with each other. The positioning unit includes a first control lever having a first end pivotally mounted on one of the two auxiliary bars and a second end formed with a positioning channel, and a second control lever having a first end pivotally mounted on the other auxiliary bar and a second end detachably mounted in the positioning channel of the first control lever. Thus, the foldable frame is folded by pressing the second cover, so that the foldable frame can be folded by his one hand only, thereby facilitating the user folding the foldable frame.