Cleaner

1. A cleaner comprising:

a main body having an intake provided to suction an object;

a suction device having a brush chamber that communicates with the intake;

a brush accommodated in the brush chamber; and

a brush base attachable to and detachable from a lower portion of the brush chamber to cover the brush chamber and to guide air to the intake,

wherein the brush includes

a brush body rotatably coupled to the brush chamber,

a blade formed to protrude along a radial direction of the brush body, and

prevention structures formed to be inclined from a central portion of the brush body to opposite side ends of the brush body to prevent foreign substance from being wound around the blade,

wherein the brush base includes

a base frame,

a space portion through which the brush passes, and

a connecting portion formed to extend inward from the base frame to partition the space portion, and

wherein the brush body includes a groove portion provided at a central portion of the brush body so that the connecting portion is positioned in the groove portion and a grinder positioned between the groove portion and the brush base to cut debris suctioned into a space between the groove portion and the grinder.

2. The cleaner of claim 1 , wherein the prevention structures are spaced apart from the blade at a same distance along a longitudinal direction of the brush body.

3. The cleaner of claim 1 , wherein the prevention structures are arranged along a rotation direction of the brush body from the central portion of the brush body to the longitudinal direction opposite sides of the brush body.

4. The cleaner of claim 1 , wherein the prevention structures protrude along the radial direction of the brush body at a height smaller than a height at which the blade protrudes along the radial direction of the brush body.

5. The cleaner of claim 1 , wherein the prevention structures are arranged bilaterally symmetrical to the central portion of the brush body.

6. The cleaner of claim 1 , wherein the blade is among a plurality of blades spaced apart from each other, and

the prevention structures are arranged at a same distance from the plurality of blades arranged at opposite sides of the prevention structures and among the plurality of blades.

7. The cleaner of claim 1 , wherein the prevention structures are formed of material having a rigidity greater than a rigidity of material forming the blade.

8. The cleaner of claim 1 , wherein the prevention structures are formed of same material as material forming the brush body.

9. The cleaner of claim 1 ,

wherein the brush base further includes a blocking structure having an inclined portion that is configured to block foreign substance from being introduced into the brush chamber.

10. The cleaner of claim 9 , wherein the blocking structure is among a plurality of blocking structures spaced apart from each other, and

the inclined portions of blocking structures adjacent to each other among the plurality of blocking structures are inclined in a same direction.

11. The cleaner of claim 10 , wherein the inclined portions of the blocking structures adjacent to each other among the plurality of blocking structures are spaced apart from each other at a constant interval along a direction from a front surface of the brush base to a rear surface of the brush base.

12. The cleaner of claim 1 , wherein the suction device further includes a friction structure arranged on the brush chamber to separate an object to be cleaned being wound around the blade using a frictional force of contacting with the blade.

13. The cleaner of claim 12 , wherein the friction structure is arranged above the intake while being adjacent to the intake.

14. The cleaner of claim 12 , wherein the friction structure is arranged along a longitudinal direction of the brush body.

15. The cleaner of claim 12 , wherein the friction structure is arranged between the intake and a rotation shaft of the brush body.