Path-conversion valve assembly for vacuum cleaner

1. A path-conversion valve assembly for a vacuum cleaner, comprising:

a tubular valve member rotatably disposed in an air path formed in a vacuum cleaner, the vacuum cleaner having a socket for receiving a hose nozzle and the valve member having a passage that remains unobstructed at all times and places a vacuum source in fluid communication with an air inlet of a suction brush, said valve member further having a protrusion part that extends slantingly from an outer circumference of the valve member; and

a resilient member mounted in the air path to resiliently press the rotating valve member in a first direction,

wherein the valve member rotates in a second direction opposite the first direction in response to insertion of the hose nozzle into the socket and the hose nozzle presses against the protrusion part of the valve member.

2. The path-conversion valve assembly of claim 1 , comprising:

a first hook part formed at the valve member to catch one side of the resilient member; and

a second hook part formed at the air path to catch the other side of the resilient member.

3. The path-conversion valve assembly of claim 1 , wherein

the valve member includes a projection, and

the air path includes a projection groove for insertion of the projection.

4. A path-conversion valve assembly for a vacuum cleaner, comprising:

a valve member rotatably disposed at an intersection of first, second, third, and fourth ducts in the vacuum cleaner, the first duct being in fluid communication with a vacuum source for generating a suction force, the second duct being in fluid communication with a hose connector, the third duct being in fluid communication with an air inlet of a brush assembly, the fourth duct being configured to receive a hose nozzle, and the valve member having a passage that remains unobstructed at all times and places the first duct in fluid communication with the third duct and an opening that places the first duct in fluid communication with the second duct when the valve member is rotated to a first position, said valve member further having a protrusion part that extends slantingly from an outer circumference of the valve member; and

a resilient member applying a rotating force to the valve member in a direction toward the first position and away from a second position,

wherein the valve member rotates from the first position to the second position in response to insertion of the hose nozzle into the fourth duct and the hose nozzle presses against the protrusion part of the valve member.

5. The path-conversion valve assembly of claim 4 , wherein the valve member is rotated from the second position to the first position by the resilient member upon separation of the hose nozzle from the fourth duct and thereby brings the first and the second ducts into fluid communication with each other.

6. The path-conversion valve assembly of claim 1 , further comprising a second resilient member attached to a side of the valve member.