Patent ID: 7395579

Claim:
A cyclone dust collecting device for a vacuum cleaner, which is interposed between a first air inlet path connected to a suction port assembly and a second air inlet path connected to a vacuum generator of the vacuum cleaner, comprising: a cyclone body having a first through hole connected to the first air inlet path, a second through hole formed at a lower end to be connected to the second air inlet path, and a cyclone chamber adapted to centrifugally separate contaminants from air drawn into the chamber through the first through hole and collect the contaminants therein; and an air inlet pipe having an inlet port disposed in the cyclone chamber and an outlet port penetrating through a bottom side of the cyclone chamber in which the contaminants are stacked and connected to the second through hole, wherein the outlet port of the air inlet pipe is formed in a shape which gradually increases in diameter toward a lower portion of the cyclone body.