Patent ID: 8544955

Claim:
A tiltable chair constructed so that a seat plate body and a back plate body are coupled to a tilt to allow the chair to be tilted, wherein the back plate body comprises a back plate frame and a back plate which is coupled to the back plate frame in such a way as to move up and down with respect to the back plate frame by moving means, a front part of the seat plate body is coupled to one side of the tilt, the back plate frame is coupled to another side of the tilt, and a rear part of the seat plate body is coupled to the back plate body, wherein the moving means comprise a lower connecting part arranged with a lower part of the back plate connected to the back plate frame, the lower connecting part has a link connecting structure using a plurality of links comprising first, second, third, and fourth links, and wherein one end of the first link is hinged to the seat plate body, the other end of the first link is hinged to one end of the second link, a central part of the second link is hinged to the back plate frame, the other end of the second link is hinged to one end of the third link, the other end of the third link is hinged to one end of the fourth link and the back plate, the other end of the fourth link is hinged to the back plate frame.