Abstract: A dust collecting device of a vacuum cleaner includes a first cyclone unit comprising a first cyclone chamber where the air enters through a first inlet and spins, and a first dust collecting chamber where dust separated from the air is collected; and a second cyclone unit comprising a second cyclone chamber where the air, discharged from the first cyclone unit, enters through a second inlet and spins, and one or more dust collecting parts formed on a circumference of a second cyclone body to separate minute dust from the air upon contacting with the air spinning within the second cyclone chamber. Accordingly, efficiency in collecting minute dust by the dust collecting device increases.

Abstract: In a cyclone dust collecting apparatus for use in a vacuum cleaner, mounted in a dust collecting chamber intercommunicating with a motor driving chamber of a cleaner body, for separating contaminants from an air that is drawn in through a suction brush by a centrifugal force, the cyclone dust collecting apparatus includes: a contaminant receptacle having a contaminant chamber and an air discharge chamber, the contaminant chamber and the air discharge chamber respectively having open upper sides and partitioned from each other; a cyclone unit connected to an upper portion of the contaminant receptacle in a manner of covering the contaminant chamber and the air discharge chamber, the cyclone unit having a hole corresponding to, respectively, an incoming air port through which foreign substance laden air flows in, a centrifuging chamber for separating the foreign substances from the air by a centrifugal effect, a contaminant discharge port through which the separated foreign substances are discharged, an outgoin