Patent ID: 7895707

Claim:
A height adjusting apparatus of a suction body for use in a upright vacuum cleaner capable of adjusting a distance between a rotary brush and a surface to be cleaned, comprising: a lifting unit pivotably disposed to the suction body; and an actuating unit disposed at the rear of the suction body, so that a portion thereof is exposed to the outside from the suction body, and lifting or lowering the lifting unit as the portion thereof is repeatedly pushed by a user, wherein the actuating unit comprises a lever having a pedal pushable with a foot of the user, a cam wheel rotatably disposed and coming in cam contact with one end of the lifting unit at one side thereof, and a fixing bracket to which the lever and the cam wheel are mounted, and the lever, the cam wheel, and the fixing bracket are firmly assembled to one another to be mountable to and detachable from the suction body as a single body, wherein the fixing bracket has a stopper integrally formed therewith, so that the cam wheel is not inversely rotated, but fixed even though an external force is removed from the pedal, wherein the cam wheel has a plurality of hanging projections inclinedly projected in the same directions from a surface thereof coming in contact with the lever and arranged in the same intervals in a circle shape about a center thereof, respectively, and wherein the lever is rotatably joined to the fixing bracket along with the cam wheel, so that a center thereof is aligned with the center of the cam wheel, and has at least one elastic projection formed in a direction corresponding to the inclined direction of the plurality of hanging projections on a surface thereof coming in contact with the cam wheel, so that in a repetitive pivoting motion of the lever, the elastic projection is snappishly and elastically engaged to one of the plurality of hanging projections to rotate the cam wheel only in one direction.