Vacuum cleaner usable with cyclone and pocket-type dust collectors

A vacuum cleaner, comprising:

• a single suction nozzle having a suction port contacting with a surface to be cleaned, a brush, and a vacuum generating device for generating a suction force at the suction port;
• an air suction path connected to one end to the vacuum generating device of the suction brush;
• a dust collecting apparatus connected to the other end of the air suction path, for separating and collecting dust and contaminants from air drawn in through the air suction path,
• the dust collecting apparatus comprising:
• a cyclone-type dust collecting apparatus including a dust chamber having a first capacity, said cyclone-type dust collecting apparatus causing the drawn air to whirl and thus separate dust and contaminants from the air by centrifugal force generated by the whirling air, and
• a pocket-type dust collecting apparatus having a dust pocket of a second capacity, said pocket-type dust collecting apparatus causing the drawn air to pass through the dust pocket, thereby filtering out dust and contaminants from the air,
• the cyclone-type dust collecting apparatus or the pocket-type dust collecting apparatus being used alternatively in accordance with the characteristics of the space to be cleaned;
• a fixing member provided to the suction brush having a shape of a hollow pipe standing upright on the suction nozzle, said fixing member removably securing either the cyclone-type dust collecting apparatus or the pocket-type dust collecting apparatus to the suction brush, as needed;
• and
• one or more fastening members perpendicularly passing through the fixing member.