Patent ID: 7735930

Claim:
A width control device of an armrest for vehicles, comprising: a main armrest provided at a center position in a rear seat so as to be rotatable between an upright position and a horizontal position; subsidiary armrests provided in respective opposite sides of the main armrest so as to be slidable in opposite directions based on the main armrest, each of the subsidiary armrests being supported by a support plate; a screw bar to push or pull each of the subsidiary armrests depending on rotation of a first gear; a rotating shaft provided with a second gear engaging with the first gear of the screw bar to rotate in conjunction with the first gear; a reversible motor to reversibly rotate the rotating shaft; a support member fastened to the main armrest for supporting the screw bar and the reversible motor; and a switch provided in a front part of the main armrest to control extraction or retraction of the subsidiary armrests from or into the main armrest.