Suction brush for vacuum cleaner

1. A suction brush for a vacuum cleaner, comprising:

a brush main body connected to a cleaner main body and having a first side, a second side, and a bottom surface, and having a dust suction port provided on the bottom surface of the brush main body;

a first wheel rotatably engaged with the first side of the brush main body;

a second wheel rotatably engaged with the second side of the brush main body; and

at least one hair removing unit, arranged in front of the dust suction port, receiving rotation drive forces from the first and second wheels and raking up hair existing on a surface to be cleaned toward the dust suction port,

wherein the hair removing unit has a part that is exposed in front of the brush main body, the part moving forward and backward in a moving direction of the brush main body.

2. The suction brush of claim 1 , wherein the hair removing unit comprises:

a cam member, rotatably installed in the brush main body, receiving the rotation drive force of the first or second wheels;

a movable member for moving forward and backward with respect to a moving direction of the brush main body in accordance with a rotation of the cam member; and

a rib, having an upper end and a lower end, the upper end coupled to a lower part of a front end of the movable member, the lower end raking up the hair on the surface to be cleaned.

3. The suction brush of claim 2 , wherein the movable member comprises:

a cam contact unit, arranged to be in elastic contact with the cam member, for going and returning in accordance with the rotation of the cam member; and

a rib support unit for supporting the rib, the rib support unit being coupled to the cam contact unit for driving the rib in the same direction as a driving direction of the cam contact unit.

4. The suction brush of claim 3 , wherein the rib support unit is arranged along a front portion of the brush main body, and the rib has a length that corresponds to the rib support unit.

5. The suction brush of claim 3 , wherein the rib support unit is exposed to an outside of the brush main body.

6. The suction brush of claim 3 , wherein the rib support unit has a center that coincides with a rotation center of the cam member.

7. The suction brush of claim 2 , wherein the lower end of the rib is rounded toward the suction port.

8. The suction brush of claim 2 , wherein the lower end of the rib is inclined toward the suction port.

9. A suction brush for a vacuum cleaner, comprising:

a brush main body connected to a cleaner main body and having a first side, a second side, and a bottom surface, and having a dust suction port provided on the bottom surface of the brush main body;

a first wheel rotatably engaged with the first side of the brush main body;;

a second wheel rotatably engaged with the second side of the brush main body; and

first and second hair removing units, arranged in front of the suction port, for receiving rotation drive forces from the first and second wheels and raking up hair existing on a surface to be cleaned toward the dust suction port,

wherein the hair removing unit has a part that is exposed in front of the brush main body, the part moving forward and backward in a moving direction of the brush main body.

10. The suction brush of claim 9 , wherein the first hair removing unit comprises a first cam member, installed adjacent to the first wheel in the brush main body, for rotating by a drive force of the first wheel; a first movable member, elastically arranged in the brush main body, for moving forward and backward with respect to a moving direction of the brush main body in accordance with a rotation of the first cam member; and a first rib, coupled to a lower part of a front end of the movable member, for raking up the hair on the surface to be cleaned; and

wherein the second hair removing unit comprises a second cam member, installed adjacent to the second wheel in the brush main body, for rotating by a drive force of the second wheel; a second movable member, elastically arranged in the brush main body, for moving forward and backward with respect to a moving direction of the brush main body in accordance with a rotation of the second cam member; and a second rib, coupled to the lower part of the front end of the movable member, for raking up the hair on the surface to be cleaned.

11. A suction brush for a vacuum cleaner, comprising:

a brush main body connected to a cleaner main body and having a first side, a second side, and a bottom surface, and having a dust suction port provided on the bottom surface of the brush main body;

a first wheel rotatably engaged with the first side of the brush main body;

a second wheel rotatably engaged with the first second side of the brush main body; and

at least one hair removing unit, installed in the brush main body, for moving forward and backward in a moving direction of the brush main body that moves on a surface to be cleaned by rotation drive forces of the first and second wheels;

wherein the hair removing unit has a part that is exposed in front of the brush main body, and a lower end of the part of the hair removing unit extends to a position that is lower than the bottom surface of the brush main body to rake up hair stuck on the surface to be cleaned.