Patent attributes
A ball chair may include a chair base and a restricting unit. The chair base has a circular receiving space to receive a ball and an inner portion of the receiving space has a connecting portion that has at least two through holes. The restricting unit has an arc board and a connecting post conjugating with the connecting portion. A restricting board extends from the arc board corresponding to the connecting recessed portion, and the restricting board is protruding from an upper portion of the receiving space. The connecting portion of the chair base is provided for the restricting unit to restrict the ball, and the restricting unit and the connecting portion can be quickly and easily engaged increase the convenience during the assembling process and prevent the ball from being damaged.
