Abstract: Disclosed are a chair device and a star-shaped base (3) thereof, in particular capable of being used for office chairs, work chairs, stools or standing auxiliary devices, the star-shaped base comprising a center seat (4) and a plurality of extending arms (5) mounted on the center seat (4), wherein the extending arms (5) are used for the star-shaped base (3) to be placed on the ground, and at least one of the extending arms (5) is hinged to the center seat (4) and can rotate relative to the center seat (4). A chair seat of the chair device can rotate or swing, while parts mounted at an upper end of a chair column do not need to be modified, and particularly, a supporting structure, a chair support for the chair seat to be placed, and the chair seat itself do not need to be modified.

Abstract: Disclosed are a chair device and a star-shaped base (3) thereof, in particular capable of being used for office chairs, work chairs, stools or standing auxiliary devices, the star-shaped base comprising a center seat (4) and a plurality of extending arms (5) mounted on the center seat (4), wherein the extending arms (5) are used for the star-shaped base (3) to be placed on the ground, and at least one of the extending arms (5) is hinged to the center seat (4) and can rotate relative to the center seat (4). A chair seat of the chair device can rotate or swing, while parts mounted at an upper end of a chair column do not need to be modified, and particularly, a supporting structure, a chair support for the chair seat to be placed, and the chair seat itself do not need to be modified.

Abstract: A massage mechanism includes a connecting seat, a supporting seat assembly, upper massage arms, lower massage arms, a kneading shaft and a first driving assembly. The first driving assembly is used for driving the kneading shaft to rotate, such that a connecting member and a connecting shaft are driven to perform a reciprocating motion on each supporting seat assembly, and upper massage rolling wheels and lower massage rolling wheels are close to each other or away from each other, so as to achieve a shoulder clamping action. The two upper massage arms and the upper massage rolling wheels are driven to be close to each other or away from each other, and the two lower massage arms and the lower massage rolling wheels are close to each other or away from each other, so as to achieve a kneading action.