Patent attributes
A cup holder for a chair includes a cup holder fixing seat, a cup holder middle sleeve and a cup bottom. The fixing seat includes a connecting part and a first limiting rim. The middle sleeve includes second and third limiting rims and at least one first detention. The cup bottom includes a fourth limiting rim and at least one second detention. The second limiting rim is slidable along an inner wall of the fixing seat, and the fourth limiting rim is slidable along an inner wall of the middle sleeve. When unfolded, the second limiting rim of the middle sleeve is seated on and supported by the first limiting rim of the fixing seat, the fourth limiting rim of the cup bottom is seated on and supported by the third limiting rim of the middle sleeve.