Aspiration nozzle of vacuum cleaner and vacuum cleaner having same

1. A suction nozzle of a vacuum cleaner comprising:

a suction nozzle body having a suction portion for air suction;

a suction channel, provided at the suction nozzle body, in which air suctioned through the suction portion flows;

a communication hole provided in the suction channel;

a contact portion selectively coming into contact with the communication hole to block air flow from outside the suction channel to inside the suction channel or separated from the communication hole to allow air flow from outside the suction channel to inside the suction channel according to change of pressure in the suction channel, the contact portion being provided outside the suction nozzle body;

an interlocking lever provided at the suction nozzle body and connected to the contact portion such that the interlocking lever is operated according to motion of the contact portion; and

a cleaning member provided at the interlocking lever to move upward or downward according to the operation of the interlocking lever, the cleaning member being provided at a lower part of the suction nozzle to contact a surface to be cleaned in order to scrape or sweep dust and foreign matter on the surface to be cleaned when the surface to be cleaned is a hard floor, wherein the contact portion is separated from the communication hole and the cleaning member moves downward when the surface to be cleaned is a hard floor, and wherein the contact portion comes into contact with the communication hole and the cleaning member moves upward when the surface to be cleaned is a carpet.

2. The suction nozzle according to claim 1 , wherein the interlocking lever is rotatably coupled to each side of the suction channel and is rotated according to the motion of the contact portion.

3. The suction nozzle according to claim 1 , wherein the cleaning member comprises:

a moving frame to move upward or downward according to the operation of the interlocking lever; and

a brush fixed to one side of the moving frame.

4. The suction nozzle according to claim 3 , wherein the cleaning member further comprises a pivot portion provided at an other side of the moving frame and rotatably coupled to one end of the interlocking lever.

5. The suction nozzle according to claim 1 , wherein

the interlocking lever has a push protrusion disposed at a lower side of the contact portion,

the suction channel has a support protrusion facing the push protrusion, and

an elastic member is disposed between the push protrusion, and the support protrusion.

6. The suction nozzle according to claim 5 , wherein the elastic member comprises a spring.

7. The suction nozzle according to claim 1 , further comprising an indication protrusion formed on the contact portion to indicate a position of the cleaning member.

8. The suction nozzle according to claim 7 , further comprising a cover coupled to the suction nozzle body to cover an upper part of the suction nozzle body, the cover having an indication slit, through which the indication protrusion is exposed.

9. The suction nozzle according to claim 1 , further comprising:

front wheels coupled to the suction nozzle body such that the front wheels are provided at opposite sides of the cleaning member; and

rear wheels coupled to opposite sides of a support member fastened to the suction nozzle body and the suction channel.

10. A suction nozzle of a vacuum cleaner comprising:

a suction nozzle body having a suction portion for air suction;

a suction channel, provided at the suction nozzle body such that the suction channel communicates with the suction portion, in which air suctioned through the suction portion flows;

a communication hole provided in the suction channel;

a contact portion selectively contacting with the communication hole to block air flow from outside the suction channel to inside the suction channel or separated from the communication hole to allow air flow from outside the suction channel to inside the suction channel according to change of pressure in the suction channel, the contact portion being provided outside the suction nozzle body;

a link member rotatably coupled to the suction channel; and

a cleaning member coupled to one end of the link member,

wherein the cleaning member moves upward or downward according to the rotation of the link member, the cleaning member being provided at a lower part of the suction nozzle to contact a surface to be cleaned in order to scrape or sweep dust and foreign matter on the surface to be cleaned when the surface to be cleaned is a hard floor, wherein the cleaning member includes:

a moving frame to move upward or downward;

a brush fixed to one side of the moving frame; and

pivot portions disposed at other side of the moving frame to rotatably connect the moving frame to the link member,

wherein the contact portion is separated from the communication hole and the cleaning member moves downward when the surface to be cleaned is a hard floor, and

wherein the contact portion contacts the communication hole and the cleaning member moves upward when the surface to be cleaned is a carpet.

11. The suction nozzle according to claim 10 , further comprising:

first coupling members to fasten the link member to the suction channel, wherein

the first coupling members are inserted into first coupling holes formed at opposite sides of the link member and through holes formed at opposite sides of the suction channel, and

the link member comprises:

interlocking levers rotated about the first coupling members; and

a contact portion provided at one-side ends of the interlocking levers.

12. The suction nozzle according to claim 11 , wherein

the contact portion is provided to face the communication hole such that the contact portion selectively comes into contact with or is separated from the communication hole according to change of pressure in the suction channel, and

the interlocking levers are rotated according to motion of the contact portion.

13. The suction nozzle according to claim 12 , further comprising:

an indication protrusion formed on the contact portion to indicate a position of the cleaning member; and

a cover coupled to the suction nozzle body to cover an upper part of the suction nozzle body, the cover having an indication slit, through which the indication protrusion is exposed.

14. The suction nozzle according to claim 11 , wherein

pivot portions is rotatably connected to second coupling holes formed at an other-side ends of the interlocking levers.

15. A vacuum cleaner comprising:

a cleaner body;

a vacuum motor provided at the cleaner body; and

a suction nozzle to suction air using suction force generated by the vacuum motor, wherein the suction nozzle comprises:

a suction nozzle body having a suction portion for air suction;

a suction channel, provided at the suction nozzle body, in which air suctioned through the suction portion flows;

a communication hole provided in the suction channel;

a contact portion selectively coming into contact with the communication hole to block air flow from outside the suction channel to inside the suction channel or separated from the communication hole to allow air flow from outside the suction channel to inside the suction channel according to change of pressure in the suction channel, the contact portion being provided outside the suction channel, the contact portion being provided outside the suction nozzle body;

an interlocking lever provided at the suction nozzle body and connected to the contact portion such that the interlocking lever is operated according to motion of the contact portion; and

a cleaning member provided at the interlocking lever to move upward or downward according to the operation or the interlocking lever, the cleaning member being provided at a lower part of the suction nozzle to contact a surface to be cleaned in order to scrape or sweep dust and foreign matter on the surface to be cleaned when the surface to be cleaned is a hard floor and to move upward in order not to contact the surface to be cleaned when the surface to be cleaned is a carpet,

wherein the contact portion is separated from the communication hole and the cleaning member moves downward when the surface to be cleaned is a hard floor, and

wherein the contact portion contacts the communication hole and the cleaning member moves upward when the surface to be cleaned is a carpet.

16. The vacuum cleaner of claim 15 , further comprising an extension pipe and a connection pipe to connect the suction nozzle to the cleaner body.

17. The vacuum cleaner of claim 15 , wherein the cleaning member includes:

a moving frame to move upward or downward;

a brush fixed to one side of the moving frame.

18. The vacuum cleaner of claim 17 , wherein the cleaning member further includes pivot portions disposed at other side of the moving frame to rotatably connect the moving frame to the interlocking lever.

19. The vacuum cleaner of claim 15 , wherein the suction nozzle further comprises a cover coupled to the suction nozzle body to cover an upper part of the suction nozzle body.

20. The vacuum cleaner of claim 19 , wherein the suction nozzle further comprises an indication protrusion to indicate a position of the cleaning member and the cover has an indication slit though which the indication protrusion is exposed.