CPC B60N 2/233 (2013.01) [B60N 2/0232 (2013.01); B60N 2/62 (2013.01); B60N 2/6673 (2015.04); B60N 2/68 (2013.01)] | 6 Claims |
1. A support driver supporting a cushion pivotably coupled to a seat frame, the support driver comprising:
a lead screw disposed at the rear of the cushion, connected to a drive shaft of a motor, and comprising threads provided on one side and the other side to extend in opposite directions;
nuts screw-coupled to one side and the other side of the lead screw, with a rear surface thereof being coupled to the seat frame so as to be movable to one side or the other side;
a support block coupled to the seat frame on a central portion of the lead screw and protruding more forward than the nuts; and
links each comprising one end coupled to a corresponding nut of the nuts so as to be pivotable about a shaft extending in a top-bottom direction, an other end being in close contact with the rear surface of the cushion, and a part between the one end and the other end being intersected with corresponding part of the other link at the support block, and slidably guided and supported by the support block,
wherein the nuts are moved toward the support block following forward pivoting of the lead screw in response to an operation of the motor, and the other ends of the links push the cushion.
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