Lumbar support of car seat

摘要

A lumbar support of a car seat according to the present invention includes: a support plate to support user's back and made of elastic material; a support frame to which the support plate is rotatably engaged; a slider member mounted on the support frame in a movable manner in a vertical direction; a vertically driving means to move the slider member on the support frame; a biasing force control means including an upper member moving together with the slider member, a lower member disposed below the upper member, a biasing member connecting the upper and lower members to each other and having a controllable biasing force acting on the support plate depending on a distance between the upper and lower members, and an actuating means to control the distance between the upper member and the lower member.

主权项

1. A lumbar support of a car seat, comprising:
support plates made from a synthetic resin material in the shape of a plate and having a plurality of support wings at both sides and fixing hooks on top of the rear surface thereof; support frame positioned at the rear portions of the support plates and having a support rod engaged with the fixing hooks and a pair of guide rods connected to the support rod in parallel to each other; slider member provided to move in the vertical direction by the guide of the guide rods and having a spiral hole formed in the center thereof; vertically driving means having a driving motor driven by an external input signal and a screw which is coupled in the spiral hole of the slider member so as to move the slider member by the operation of the driving motor; and a biasing force control means positioned between the support plates and the support frame and controlling the pressing degree of the support plates according to the operation of a user, wherein the biasing force control means includes; an upper member coupled to the slider member; a lower member guided to move in contact with the guide rods of the support frame; and coil springs having both end portions which are respectively fitted and fixed into the upper member and the lower member and a shaft fitted into a coil portion in the center thereof; wherein a wire which passes through an insertion hole of the lower member so as to be held by the upper member is pulled and released by an actuator such that the central coil portion of the coil springs presses the support plates.