Patent ID: 8020933

Claim:
A lumbar support device of a seat for a vehicle, comprising: a mounting bracket fastened to a seat back frame; a support panel coupled to the mounting bracket through link units so as to be movable ahead of the seat back frame; an actuator coupled to the link units and the mounting bracket; side support units coupled to respective opposite ends of the support panel so as to be rotatable in forward and rearward directions; and a connection wire connected between each of the side support units and a corresponding link unit of the link units of the support panel such that when the support panel moves forwards, the extension of the links create a pulling force on the connection wire which, in turn, causes the side support units to rotate forwardly relative to the support panel so as to provide a lateral side support for a seat occupant; wherein the link units support the opposite ends of the support panel, and each of the link units comprises a double link structure including a front link hinged to the support panel and a rear link hinged to the mounting bracket.