Abstract: Multi-cyclone dust collector including a primary cyclone body and dust collecting box for causing circulation of air and collecting various foreign matters, the primary cyclone body and dust collecting box having a first air inlet for drawing air together with various foreign matters and a first air outlet for discharging air from which the various foreign matters are removed primarily, a secondary cyclone body over the primary cyclone body and dust collecting box for causing circulation of the air to flow in a direction at a right angle to the direction of air flow in the primary cyclone body and dust collecting box, the secondary cyclone body having a second air inlet in communication with the first air outlet for drawing the air from the primary cyclone body and dust collecting box to the secondary cyclone body in a direction tangential to an inside circumference of the secondary cyclone body, and a second air outlet in a center of one side of the second air cyclone body in the vicinity of the first air ou

Abstract: An extension tube in a vacuum cleaner includes a lower extension tube for drawing dust laden air through an air suction nozzle fitted at one end, an upper extension tube having one end connected to a hand grip extended to a body of the vacuum cleaner for passing the dust laden air drawn through the lower extension tube, a joint part connected to the other ends of the lower extension tube and the upper extension tube for making the lower extension tube and the upper extension tube foldable relative to each other to a preset angle, and a locking arrangement for locking the joint part to fold/unfold the joint part selectively, thereby permitting a user to fold the upper and lower extension tubes, and to carry out an easy cleaning of even an underside of a sofa or a bed without bending the user's body, thereby enhancing the user's convenience.

Abstract: Extension tube in a vacuum cleaner including a lower extension tube for drawing dust laden air through an air suction nozzle fitted at one end, an upper extension tube having one end connected to a hand grip extended to a body of the vacuum cleaner for passing the dust laden air drawn through the lower extension tube, a joint part connected to the other ends of the lower extension tube and the upper extension tube for making the lower extension tube and the upper extension tube foldable relative to each other to a preset angle, and locking means for locking the joint part to fold/unfold the joint part selectively, thereby permitting a user to fold the upper, and lower extension tubes, and to carry out an easy cleaning of even an underside of a sofa, or a bed without holding the extension tube horizontally parallel to the floor, or bending body, reducing tiredness coming from the cleaning work, and enhancing user's convenience.