Patent ID: 7032731

Claim:
A seat cushion adjusting device for a vehicle, for engaging with a link means adapted to adjust a height of a seat cushion upon a user's operation of an adjusting lever, comprising: a clutch unit adapted to transmit a rotating force to the link means in a desired direction where the seat cushion is to be moved; and a brake unit for fixing the operated link means so as not to move, wherein the clutch unit and the brake unit are accommodated between a lower bracket and an upper bracket, wherein the clutch unit is arranged between the upper bracket and one surface of a base, which is interposed between the lower bracket and the upper bracket, and the brake unit is arranged between the lower bracket and the other surface of the base, wherein the clutch unit includes: a roller assembly accommodated in a clutch recess defined on the one surface of the base, the roller assembly including an annular retainer ring with a plurality of rollers received in roller-receiving cavities formed at regular intervals in the annular retainer ring; a lever block rotatably received in the annular retainer ring of the roller assembly; and a lever bracket coupled to the lever block to operate it, wherein the brake unit includes: a link connection gear coupled with a shaft and extending through shaft holes of the lower bracket for engaging with the link means; an operating plate accommodated in a brake guide, which is coupled into a receiving recess of the lower bracket; power transmission grooves formed on an outer circumferential surface of the operating plate and adapted to receive power from power transmission pins formed on the other surface of the base; flattened portions each formed between the power transmission grooves on the outer circumferential surface of the operating plate; plural pairs of brake pins accommodated between the flattened portions and the brake guide, and adapted to transmit only in an operating direction power of the base and prevent transmission thereof in a reverse direction; and elastic members, each being interposed between two adjacent brake pins of the plural pairs of brake pins, and adapted to continuously push the brake pins in a circumferential direction of the flattened portions for fixedly maintaining the brake pins between an inner circumferential surface of the brake guide and the flattened portions, and wherein pin pushers integrally protrude from both sides of the respective power transmission pins, which are integrally formed on the other surface of the base, the pin pushers being positioned adjacent to the brake pins, and wherein the lever bracket has a spring hook protruding toward the base, the spring hook, along with a spring hook of the lower bracket, being caught by a return spring adapted to return the adjusting lever in an original position.