Patent ID: 9744891
Date: 2017-08-29
CPC Classifications: B60N

Claim:
1. A lumbar support assembly installed at a seat back frame at the inside of a vehicle seat and configured to support the back region of an occupant, comprising: a suspension mat coupled to the seat back frame; a guide box coupled to the suspension mat, wherein the guide box is formed in a half-divided shape and composed of upper and lower housings that are coupled to each other, and both the upper and lower housings of the guide box have an actuator coupled to the guide box and including a spindle shaft disposed at one side thereof configured to be positioned within the guide box; a pair of spindle nuts screw-coupled to the spindle shaft and slidably moved in opposite directions to each other along with the rotation of the spindle shaft, wherein each of the pair of spindle nuts has an upper rib formed on a top thereof and two side ribs respectively formed at both sides thereof configured to be symmetrical with each other, so that each of the pair of guide protrusions is seated between the respective two side ribs; and a pair of cables coupled at one ends thereof to the seat back frame and coupled at the other ends thereof to the pair of spindle nuts.