Patent ID: 6357076
Filing Date: 2002-03-19
Classification: A47L

Abstract:
A suction nozzle unit for a vacuum cleaner, said suction nozzle unit being movable over a surface to be vacuumed and comprising a casing having a front and a rear and including a suction inlet, a pair of front wheels located in the front of the casing and a pair of rear wheels installed in the rear of the casing, the suction nozzle unit further comprising:shaft pins for rotatably supporting said front wheels; and moving means for providing relative up and down movement between said casing and said shaft pins so as to vary the height of the casing relative to the surface to be vacuumed, said moving means comprising a rotation shaft extending parallel to said shaft pins and mounted in said casing for movement up and down with said casing; rotation arms connecting said rotation shaft and said shaft pins; and shaft rotation means for rotating said shaft pins relative to said rotation shaft so as to cause said casing to move up and down, said shaft rotation means comprising an operating lever extending radially from said rotation shaft; and a driving means for rotating said operating lever, said driving means comprising an adjusting knob disposed on said casing and including a spiral shaft having an outer circumference including a spiral groove and a handle at a first end of said spiral shaft for rotating said spiral shaft; and a slider member including an inner circumference having a spiral rib therein engaging in the spiral groove of the spiral shaft of said adjusting knob and being mounted on said casing so as to move up and down along said groove in response to the rotation of said spiral shaft, thereby to cause rotation of said operating lever.