Patent ID: 7753976

Claim:
A dust collecting device for a vacuum cleaner comprising: a primary cyclone unit having two primary cyclones arranged in parallel, for separating dust by a cyclone principle; a secondary cyclone unit haying at least two secondary cyclones which receives air from the primary cyclones on an outer side of the primary cyclones for separating dust by the cyclone principle wherein each of the at least one secondary cyclone includes; a secondary cyclone body in the dust container, having a second inlet in an outside circumferential surface; and a first guide member having one end connected to a circumference of the second inlet for guiding the air from the primary cyclones to a tangential direction of an inside circumferential surface of the secondary cyclone body; and a dust container having the primary cyclone unit and the secondary cyclone unit mounted thereto, and a primary dust collecting space for storing the dust separated at the primary cyclone unit, and at least one secondary dust collecting space for storing the dust separated at the secondary cyclone unit formed therein.