Patent ID: 8740306

Claim:
A chair structure comprising: a seat frame having a first coupling element; and a support base including a pivot axle fixed thereon and a second coupling element pivotally assembled about the pivot axle, the pivot axle being received at least partially in the second coupling element, wherein the second coupling element includes a latch operable to: lock the first coupling element with the second coupling element when the seat frame is assembled with the support base, and unlock the first coupling element from the second coupling element for allowing separation of the seat frame from the support base; wherein the seat frame and the first and second coupling elements are operable to rotate in unison relative to the pivot axle when the first and second coupling elements are locked with each other by the latch, and the first coupling element is removed from the second coupling element when the seat frame is detached from the support base, the second coupling element being held with the pivot axle on the support base when the seat frame and the first coupling element are removed from the support base.