Patent ID: 8333431
Filing Date: 2012-12-18
Classification: B60N

Abstract:
1. A lumbar supporting device for a vehicle, comprising: an actuator; a lumbar plate slidably mounted to a support frame fixed to a seat back frame of the vehicle, and having a lumbar support part, wherein the lumbar support part is formed between upper and lower ends of the lumbar plate; and a driving unit coupled to the actuator and pulling both upper and lower portions of the lumbar plate together along the support frame towards the lumbar support part, using power transmitted from the actuator; wherein the lumbar support part is more elastic than a remaining portion of the lumbar plate, and wherein the lumbar support part protrudes forwardly from the remaining portion of the lumbar plate relatively with respect to the support frame as the upper and lower ends of the lumbar plate move toward the lumbar support part along the support frame by the actuator, and wherein the driving unit comprises: a center wheel rotatably mounted to the lumbar plate under the lumbar support part thereof; a driving cable connected at a first end thereof to the actuator and at a second end thereof engaged with an outer circumference of the center wheel and connected to the lower portion of the lumbar plate; and a connecting unit connecting a portion of the outer circumference of the center wheel to the upper portion of the lumbar plate.