Dust collecting apparatus for vacuum cleaner

Claim 1

A dust collecting apparatus detachably coupled with a vacuum cleaner, the dust collecting apparatus comprising: a dust canister body comprising: an exposed side exposed outside the vacuum cleaner upon mounting in the vacuum cleaner; a first dust separating chamber for separating heavy dirt from air flowed in through an inlet port formed at one side of the first dust separating chamber using inertia and gravity; a second dust separating chamber and a third dust separating chamber, the second dust separating chamber and the third dust separating chamber being isolated from the first dust separating chamber, the second dust separating chamber and the third dust separating chamber collecting fine dust from the air passing through the first dust separating chamber; a first cyclone body and a second cyclone body having first and second cyclone chambers, respectively, which are respectively communicated with the first dust separating chamber, the first and second cyclone bodies separating the fine dust from the air passing through the first dust separating chamber using centrifugal force generated when the air is rotated; and first and second outlet pipes which are respectively protruded from lower surfaces of the first and second cyclone bodies to upper sides of the first and second cyclone chambers, wherein the first and second cyclone bodies are eccentrically disposed in the first and second dust separating chambers so as to form a protruded portion which is exposed from the exposed side of the dust canister body, and wherein at least the protruded portion is made of a transparent material, and wherein the first dust separating chamber comprises an inertia blocking plate arranged at a position corresponding to the inlet port of the dust canister body so that the dirt flowing through the inlet port in the first dust separating chamber collides with the inertia blocking plate at an early stage of the air flow and is pulled downward by gravity.