Chair structure and method of assembling the same

A chair structure comprising:

• a seat frame having a first coupling element;
• a support base including a pivot axle fixed thereon, and a second coupling element pivotally assembled about the pivot axle and including a latch and an anti-rotation lock,
• the latch being 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;
• the anti-rotation lock being movable along a direction substantially parallel with the pivot axle for either blocking or allowing rotation of the seat frame about the pivot axle, when the seat frame is assembled with the support base, wherein an end portion of the anti-rotation lock includes a catch that detachably fastens with a portion of the second coupling element when the anti-rotation lock is moved away from the support base to a second position for allowing rotation of the seat frame.

A method of assembling and disassembling a chair structure including a seat frame and a support base, the method comprising:

• providing a seat frame having a first coupling element, wherein the first coupling element has a hole;
• providing a support base having a pivot axle and a second coupling element pivotally mounted around the pivot axle, wherein the second coupling element includes a latch thereon, and the pivot axle is received at least partially in the second coupling element;
• assembling the seat frame with the support base by sliding the first coupling element over the second coupling element until the latch engages through the hole for locking the first coupling element with the second coupling element, wherein the seat frame and the first and second coupling elements are rotatable in unison relative to the pivot axle when the first and second coupling elements are locked with each other by the latch;
• unlocking the first coupling element from the second coupling element;
• and
• removing the seat frame and the first coupling element from the support base and the second coupling element, 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.