CLEANER

Abstract

A cleaner includes a cleaner main body, and a suction unit connected to the cleaner main body to suck air containing dust, and provided with a brush assembly brought into contact with a floor, wherein the brush assembly includes a rotating rod rotatable in one direction, a brush portion protruding from an outer circumferential surface of the rotating rod to rotate together with the rotating rod, and a blade erected at the rear of the brush portion in the one direction to be adjacent to the brush portion, and brought into contact with the brush portion during the rotation in the one direction, to prevent foreign substances from getting tangled in the brush portion. This configuration may prevent foreign substances such as hair and the like from being tangled in the brush portion during an operation of the cleaner.

Claims

1. A cleaner, comprising a main body; and a suction head connected to the main body to suck air containing dust, and including a brush assembly configured to be positioned adjacent to a floor, wherein the brush assembly includes: a rotating rod rotatable in a rotation direction; a plurality of covers mounted on an outer circumferential surface of the rotating rod, at least two of the covers being spaced apart from each other in a circumferential direction of the rod to form a brush slit; a brush portion that is partially inserted into the brush slit and protrudes away from an outer circumferential surface of the rotating rod to rotate together with the rotating rod; and a blade that is partially inserted into the brush slit and is erected at a rear of and adjacent to the brush portion in the rotation direction, such that the blade is brought into contact with the brush portion during rotation of the rotating rod, wherein one of the covers includes a hook protruding toward the rotating rod, and wherein the rotating rod includes a recess formed on the outer circumferential surface of the rotating rod to receive the hook.

2. The cleaner of claim 1, wherein the brush portion includes a plurality of bristles that are each positioned in a radial direction of the rotating rod along a preset path from one end to another end of the rotating rod.

3. The cleaner of claim 1, wherein the blade protrudes in the radial direction from the outer circumferential surface of the rotating rod and extends along a corresponding path immediately adjacent to the preset path.

4. The cleaner of claim 1, wherein the brush assembly further includes a support member erected adjacent to and at a rear of the blade in the rotational direction, so as to support the blade during rotation of the rotating rod in the rotational direction.

5. The cleaner of claim 4, wherein the support member is made of a material having a higher elastic modulus than that of the blade.

6. The cleaner of claim 4, wherein the support member includes a plurality of bristles that are partially received in the brush slit.

7. The cleaner of claim 4, wherein the brush portion, the blade, and the support member extend to common height from the outer circumferential surface of the rotating rod.

8. The cleaner of claim 1, wherein the brush assembly includes: a base extending along the brush slit and formed to be inserted between an inner circumferential surface of one of the covers and the outer circumferential surface of the rotating rod, and wherein the brush portion is mounted on the base.

9. The cleaner of claim 1, wherein the brush assembly further includes an end cover coupled to an axial end of the rotating rod to support the brush portion in an axial direction of the rotating rod.

10. The cleaner of claim 9, wherein the end cover includes a through hole formed in the axial direction of the rotating rod, and wherein the brush assembly further includes a connection pin elastically supported inside the rotating rod such that the connection pin moves to be received within the rotating rod when a force is applied to the connection pin and to be inserted through the through hole when the force is not applied.

11. The cleaner of claim 1, wherein the brush slit extends from one end to another end of the rotating rod in a shape that includes at least one bend, and wherein the brush portion is made of an elastic material so as to be inserted along the brush slit in a bent manner to match the shape of the brush slit.

12. The cleaner of claim 11, wherein the brush slit has a v-shape.

13. The cleaner of claim 1, wherein: a plurality of the brush slits are formed between a plurality of covers, and the brush assembly includes: a plurality of the brush portions that extend, respectively, along the plurality of brush slits; and a plurality of the blades that are positioned adjacent to corresponding ones of the plurality of the brush portions.

14. The cleaner of claim 1, wherein the brush portion and the blade extend to common height from the outer circumferential surface of the rotating rod.

15. A cleaner, comprising a main body; and a suction head connected to the main body to suck air containing dust, and including a brush assembly configured to be positioned adjacent to a floor, wherein: the brush assembly includes: a rotating rod rotatable in a rotation direction; a plurality of covers mounted on an outer circumferential surface of the rotating rod, at least two of the covers being spaced apart from each other in a circumferential direction of the rod to form a brush slit; and a brush portion and a blade protruding away from an outer circumferential surface of the rotating rod to rotate together with the rotating rod, one of the covers includes a hook protruding toward the rotating rod, the rotating rod includes a recess formed on the outer circumferential surface of the rotating rod to receive the hook, the brush slit extends between axial ends of the rotating rod in a shape that includes at least one bend, and the brush portion is made of a deformable material so as to be inserted along the brush slit in a bent manner to match the shape of the brush slit.

16. The cleaner of claim 15, wherein: the brush assembly includes a base extending along the brush slit and formed to be inserted between an inner circumferential surface of at least one of the covers and the outer circumferential surface of the rotating rod, and the brush portion includes bristles mounted to the base.

17. The cleaner of claim 15, wherein the brush assembly further includes an end cover coupled to an axial end of the rotating rod to cover the brush slit at the axial end of the rotating rod.

18. The cleaner of claim 15, wherein the blade is separated from the brush portion by a present distance in the circumferential direction

19, The cleaner of claim 15, wherein: a plurality of the brush slits are formed between a plurality of covers to be separated from each other in the circumferential direction, and the brush assembly includes: a plurality of the brush portions that extend, respectively, along the plurality of brush slits; and a plurality of the blades that are positioned adjacent to corresponding ones of the plurality of the brush portions.

20. A cleaner, comprising a main body; and a suction head connected to the main body to suck air containing dust, and including a brush assembly configured to be positioned adjacent to a floor, wherein the brush assembly includes: a rotating rod rotatable in a rotation direction; a plurality of covers mounted on an outer circumferential surface of the rotating rod, at least two of the covers being spaced apart from each other in a circumferential direction of the rod to form a brush slit; a base extending along the brush slit and formed to be inserted between an inner circumferential surface of one of the covers and the outer circumferential surface of the rotating rod; and a brush portion and a blade, at least one of the brush portion or the blade having an end that is received in the brush slit and coupled to the base, and wherein: one of the covers includes a hook protruding toward the rotating rod, and the rotating rod includes a recess formed on the outer circumferential surface of the rotating rod to receive the hook.

Description

BRIEF DESCRIPTION OF THE DRAWING

[0045] FIG. 1 is a perspective view illustrating one embodiment of a cleaner according to the present invention.

[0046] FIG. 2 is a sectional view of an area A illustrated in FIG. 1.

[0047] FIG. 3 is a perspective view illustrating a brush assembly in accordance with one embodiment of the present invention.

[0048] FIG. 4A is an enlarged view of an area B illustrated in FIG. 3.

[0049] FIG. 4B is a sectional conceptual view illustrating an area C illustrated in FIG. 3.

[0050] FIG. 5A is a conceptual view illustrating a state in which a hair gets tangled around a brush assembly without blades.

[0051] FIG. 5B is a conceptual view illustrating a state in which a hair gets tangled around a brush assembly having blades disposed apart from brush portions.

[0052] FIG. 5C is a conceptual view illustrating a state in which a hair is sucked when a brush assembly according to one embodiment of the present invention is mounted.

[0053] FIG. 6 is an exploded perspective view of components of the brush assembly illustrated in FIG. 3 in accordance with another embodiment of the present invention.

[0054] FIG. 7 is a sectional schematic view of a brush portion illustrated in FIG. 6 in a direction that it is coupled to a rotating rod.

[0055] FIG. 8 is a perspective view illustrating a state in which the brush units illustrated in FIG. 6 are separately fabricated.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

[0056] Hereinafter, a cleaner according to the present invention will be described in detail with reference to the accompanying drawings.

[0057] The same or equivalent components may be provided with the same or similar reference numbers, even in different embodiments, and description thereof will not be repeated.

[0058] In describing the present invention, if a detailed explanation for a related known function or construction is considered to unnecessarily divert the gist of the present disclosure, such explanation has been omitted but would be understood by those skilled in the art.

[0059] The accompanying drawings are used to help easily understand the technical idea of the present invention and it should be understood that the idea of the present invention is not limited by the accompanying drawings. The idea of the present invention should be construed to extend to any alterations, equivalents and substitutes besides the accompanying drawings.

[0060] A singular representation may include a plural representation unless it represents a definitely different meaning from the context.

[0061] FIG. 1 is a perspective view illustrating one example of a cleaner 100 according to the present invention, and FIG. 2 is a sectional view of an area A illustrated in FIG. 1. As illustrated in FIGS. 1 and 2, a cleaner 100 according to the present invention includes a cleaner main body 110 and a suction unit 120.

[0062] The cleaner main body 110 defines appearance of the cleaner 100. As illustrated in FIG. 1, the cleaner 100 according to the present invention may be a robot cleaner that performs a function of cleaning a floor while traveling on a predetermined area by itself. At this time, cleaning the floor includes sucking foreign substances such as dust present on the floor or mopping the floor.

[0063] In the embodiment of the robot cleaner, the cleaner main body 110 may include a wheel unit 111 for traveling, and a controller (not illustrated) for controlling an operation of the wheel unit 111. In addition, the cleaner main body 110 may include a battery (not illustrated) for supplying power, and the battery may be detachably mounted on a bottom surface of the cleaner main body 110, for example.

[0064] The suction unit 120 is connected to the cleaner main body 110 and serves to suck air containing dust. As illustrated in FIGS. 1 and 2, the suction unit 120 may be disposed in a shape protruding from one side of the cleaner main body 110. The one side where the suction unit 120 protrudes may be a front side (F) to which the cleaner of the present invention travels. In addition, the suction unit 120, as illustrated in FIG. 1, may have a shape protruding to both of right and left sides.

[0065] The cleaner 100 according to the present invention may further include a sensing unit 130. As illustrated in FIG. 1, the sensing unit 130 may be disposed to face the front side F of the cleaner main body 110 where the suction unit 120 is located. More specifically, the sensing unit 130 may be disposed on an upper side of the suction unit 120, and detect features to prevent the suction unit 120 located at the foremost side F of the cleaner 100 from bumping into an obstacle or the like.

[0066] Meanwhile, a dust container 140 may be detachably coupled to the cleaner main body 110. In this embodiment, the dust container 140 may be located on a rear side R as another side of the cleaner main body 110, or may be formed to protrude toward the rear side R of the cleaner main body 110. In addition, when the dust container 140 is mounted on the cleaner main body 110, the dust container 140 may be covered with a dust container cover 150.

[0067] According to the connection relation between the suction unit 120 and the dust container 140, air containing dust, which is introduced through the suction unit 120, may be guided into the dust container 140 along an intake flow path 112 within the cleaner main body 110. The dust is separated from the air while passing through a filter or cyclone of the dust container 140, and collected in the dust container 140. The separated dust is discharged from the dust container 140, and finally exhausted to outside through an exhaust port via an exhaust flow path within the cleaner main body 110.

[0068] The foregoing description has been given of overall components of the cleaner 100 of the present invention. Hereinafter, a brush assembly 121 provided in the suction unit 120 of the cleaner 100 according to the present invention will be described in detail.

[0069] The suction unit 120 of the cleaner 100 according to the present invention includes a brush assembly 121 for effectively sucking dust and foreign substances present on a floor. The brush assembly 121 is brought into contact with the floor as a space to be cleaned, and serves to help a smooth introduction of foreign substances into the suction unit 120. As illustrated in FIG. 2, the brush assembly 121 may be accommodated within the suction unit 120, and specifically, may be detachably accommodated so as to be managed by a user in a clean condition.

[0070] In case of a general vacuum cleaner, the brush assembly 121 may be rotated by rolling friction with the floor according to a user's manipulation. In case of the robot cleaner, the brush assembly 121 may be automatically rotated by a separate driving motor. Hereinafter, the brush assembly 121 will be described on the basis of an example of the robot cleaner illustrated in FIGS. 1 and 2.

[0071] FIG. 3 is a perspective view illustrating the brush assembly 121 according to one embodiment of the present invention. Also, FIG. 4A is an enlarged view of an area B illustrated in FIG. 3, and FIG. 4B is a schematic sectional view of an area C illustrated in FIG. 3. Hereinafter, description will be given of one embodiment in which foreign substances such as hair and the like are prevented from remaining with being tangled in the brush assembly 121.

[0072] The brush assembly 121 according to one embodiment of the present invention includes a rotating rod 121a, brush portions 121b, and blades 121c.

[0073] The rotating rod 121a is a component that plays a role of supporting and rotating the brush portions 121b to be described later. The rotating rod 121a may be configured to be detachably coupled to the suction unit 120 so that the user can manage the brush assembly 121 in a clean state. The rotating rod 121a may be formed in a cylindrical shape extending long in left and right directions with respect to the front side F to which the cleaner is moved. The rotating rod 121a may be rotatably supported by the suction unit 120 at both left and right end portions thereof.

[0074] The brush portions 121b function to sweep foreign substances such as dust and the like on the floor and help the foreign substances to be sucked into the cleaner. Each of the brush portions 121b may be provided with a plurality of bristles 121bb protruding from an outer circumferential surface of the rotating rod 121a and disposed in a radial direction of the rotating rod 121a. The brush portions 121b may be configured to extend to both left and right sides together with the rotating rod 121a. In particular, as illustrated in FIG. 3, the brush portions 121b may be disposed along a preset path where a plurality of spirals are connected along the outer circumferential surface of the rotating rod 121a.

[0075] On the other hand, each of the blades 121c is a component for preventing thin and long foreign substances such as hair and the like from being caught (tangled) in the brush portion 121b. The blade 121c may be erected adjacent to a rear side R′ of the brush portion 121b on the rotating rod 121a when a rotating direction of the rotating rod 121a is assumed as a front side F′. The blade 121c may uprightly protrude from the outer circumferential surface of the rotating rod 121a and extend to both right and left ends of the rotating rod 121a along a preset path of the brush portion 121b.

[0076] Particularly, the blade 121c, as illustrated in FIG. 4B, is disposed adjacent to the brush portion 121b. In some cases, the blade 121c may be arranged to be in close contact with the brush portion 121b, or may be disposed with being spaced apart from the brush portion 121b at a preset interval.

[0077] However, the blade 121c of the present invention is brought into contact with the brush portion 121b at least when the rotating rod 121a is rotated. Specifically, as the brush portion 121b having elasticity is pressed by the floor at the front side F′ of the rotating direction, the brush portion 121b may be brought into contact with the blade 121c at the rear side R′.

[0078] Hereinafter, an effect that the blade 121c can prevent or extremely limit hair and the like from being tangled will be described with reference to FIGS. 4A and 4B.

[0079] Long and thin foreign substances such as hair and the like may be tangled in the plurality of bristles 121bb and the tangled foreign substances may not be easily removed merely by suction force of the suction unit 120. As illustrated in FIG. 4A, when each blade 121c is formed to substantially cross the rotating rod 121a in an axial direction of the rotating rod 121a, the hair is caught by the blade 121c so as to be prevented from being tangled in the plurality of bristles 121bb constituting the brush portion 121b. Particularly, as illustrated in FIG. 4B, when the blade 121c is positioned so as to be closely adhered to or as close as possible to the rear side R′ of the brush portion 121b, it is also possible to prevent the hair from being caught in an upper end portion of the brush portion 121b.

[0080] In the meantime, the blade 121c may be made of an elastic material, like the brush portion 121b, and may be made of a thin rubber film, for example. Particularly, the blade 121c may be made of a material having a smaller elastic modulus than the brush portion 121b. Thus, the blade 121c can prevent the introduction of foreign substances without interfering with the operation of the brush portion 121b of elastically sweeping the floor.

[0081] Also, as illustrated in FIG. 4B, the brush portion 121b and the blade 121c may have the same height h in a radial direction of the rotating rod 121a. That is, the brush portion 121b and the blade 121c may protrude from the outer circumferential surface of the rotating rod 121a by the same height.

[0082] When the blade 121c has a lower height than the brush portion 121b, hair may be caught and remain in the bristles 121bb of the upper end portion of the brush portion 121b, which are higher than the blade 121c in height, even if the blade 121c is closely adhered to the rear side of the brush portion 121b. Conversely, when the blade 121c protrudes higher than the brush portion 121b, the blade 121c may hit the floor to cause noise and damage during rotation of the brush assembly 121. Therefore, when the blade 121c is formed at the same height as the brush portion 121b, the hair introduction can be more effectively prevented.

[0083] Meanwhile, as illustrated in FIG. 4B, the brush assembly 121 may further include support members 121d, and the support members 121d may serve to support the blades 121c, respectively. The support member 121d may be erected adjacent to the rear side R′ of the blade 121c in the rotating direction of the rotating rod 121a, so as to support the blade 121c during rotation of the brush assembly 121.

[0084] In some cases, each of the support members 121d, similar to the brush portion 121b, may be provided with a plurality of bristles 121bb arranged in the radial direction of the rotating rod 121a. That is, the blade 121c may be positioned between the plurality of bristles 121bb that are arranged on both left and right ends of the rotating rod 121a.

[0085] When the support member 121d is reinforced on the rear side of the blade 121c, the blade 121c may be restricted from being lowered in height due to being pressed down on the floor when the brush assembly 121 is rotated. This may result in more reducing possibility that hair is tangled in the brush portion 121b.

[0086] Particularly, when the support member 121d is provided with the plurality of bristles 121bb like the brush portion 121b, an addition of a separate member or process can be minimized. In this case, since the support member 121d, similar to the brush portion 121b, has a greater elastic modulus than the blade 121c, the support member 121d can sufficiently play the role of supporting the blade 121c at the rear.

[0087] On the other hand, the support member 121d disposed at the rear of the blade 121c may serve to support the blade 121 even if its height is not necessarily the same as that of the blade 121c. However, another embodiment may be implemented in which the support member 121d as well as the brush portion 121b is configured by the plurality of bristles 121bb, and as illustrated in FIG. 4B, may protrude by the same height h as the brush portion 121b and the blade 121c.

[0088] In this embodiment, hair can be restricted or prevented from being caught in the brush assembly 121 even if the rotating rod 121a is rotated toward one of the front side F′ or the rear side R′. That is, the support member 121d and the brush portion 121b perform a brush function and a support function, respectively. This may be effective particularly in a general vacuum cleaner when the brush assembly 121 is frictionally rolled by the user's manipulation alternately to the front side F and the rear side R on the floor.

[0089] FIGS. 5A to 5C are conceptual views for comparing effects by the brush assembly 121 according to one embodiment of the present invention. FIG. 5A is a conceptual view illustrating a state in which hair is tangled around a brush assembly 21 without a blade. In a robot cleaner as one embodiment of the present invention, if blades are not provided, hair is consecutively introduced into the brush portions spaced apart from one another along the circumferential direction of the rotating rod 21a, so as to be tangled (wound, twisted) around the brush assembly 21.

[0090] FIG. 5B is a conceptual view illustrating a state in which a hair is tangled around a brush assembly 21 having blades 21c disposed apart from the brush portions 21b. Even if the blade 21c is mounted on the rotating rod 21a, the hair may still be introduced into a predetermined portion of an upper end of the brush portion 21b because the rotating rod 21a has a predetermined radius of curvature. In such a case, it is difficult to prevent the hair from getting tangled during the operation of the cleaner, although the removal of the hair after operation of the cleaner may be somewhat facilitated.

[0091] FIG. 5C is a conceptual view illustrating a state in which a hair is sucked when the brush assembly 121 according to the one embodiment of the present invention is mounted. The blade 121c is disposed adjacent to the brush portion 121b so as to be in contact with the brush portion 121b when the brush assembly 121 rotates. In this case, the hair may be prevented from being tangled in each brush portion 121b arranged in the circumferential direction of the rotating rod 121a, or may be separated by the suction force of the suction unit 120 even if the hair is finely introduced into the upper end portion. This may also result in preventing the hair from remaining in the tangled state within the brush assembly 121 after cleaning.

[0092] The structure of the brush assembly for preventing foreign substances such as hair and the like from being introduced and remaining in the brush assembly has been described. Hereinafter, a structure of facilitating a fabrication of the brush assembly will be described according to different embodiments for convenience of understanding.

[0093] FIG. 6 is an exploded perspective view illustrating components of a brush assembly 220 illustrated in FIG. 3 in accordance with another embodiment of the present invention. Referring to FIG. 6, a brush assembly 220 according to another embodiment of the present invention includes a rotating rod 221, covers 222, and brush units 223.

[0094] Similar to the foregoing embodiment, the rotating rod 221 may be formed in a cylindrical shape extending long to both left and right sides with respect to the front side F to which the cleaner is moved, and may be rotatably accommodated in a rotation unit.

[0095] The cover 222 is a component mounted on an outer circumferential surface of the rotating rod 221, and is provided in plurality to form brush slits 224. As illustrated in FIG. 6, the plurality of covers 222 are arranged with being spaced apart from each other in a circumferential direction of the rotating rod 221, and a space between the neighboring covers 222 becomes the brush slit 224. The cover 222 may have a shape that substantially extends from one end to another end of the rotating rod 221. The plurality of covers 222 may be arranged in parallel with being spaced apart from one another in the circumferential direction. Accordingly, the brush slit 224 may be a long and narrow space connected from the one end to the another end of the rotating rod 221. The brush slit 224 may have a shape in which one or a plurality of spirals are connected along the outer circumferential surface of the rotating rod 221.

[0096] FIG. 7 is a schematic sectional view illustrating the brush unit 223 illustrated in FIG. 6 in a direction in which the brush unit 223 is inserted into the rotating rod 221. Each of the brush units 223 of the present embodiment includes the brush portion 121b of the foregoing embodiment, and serves to sweep foreign substances such as dust and the like on the floor to be sucked into the cleaner. However, the brush unit 223 of this embodiment is formed to be inserted into the brush slit 224 from an end portion of the rotating rod 221.

[0097] To have the insertable structure, the brush unit 223 is provided with a base portion 223a and a brush portion 223b. The base portion 223a extends along the brush slit 224, and is formed to be inserted between the cover 222 and the outer circumferential surface of the rotating rod 221. As illustrated in FIG. 7, the base portion 223a is formed to extend to the front side F′ and the rear side R′ in the rotating direction of the rotating rod 221, so as to be inserted into an inner circumferential surface of the cover 222 at the front side F′ and the rear side R′. The base portion 223a may extend in an axial direction of the rotating rod 221 by a length corresponding to a path of the brush slit 224.

[0098] The brush portion 223b may be mounted on the base portion 223a, and formed in a direction protruding to the outer circumferential surface of the rotating rod 221 through the brush slit 224. That is, the brush portion 223b may be provided with a plurality of bristles which are directed in the radial direction of the rotating rod 221 and arranged in parallel along the brush slit 224.

[0099] The brush assembly 220 according to the other embodiment of the present invention may be assembled in sequence of mounting the plurality of covers 222 on the rotating rod 221 and inserting the brush units 223 into one end portion of the rotating rod 221 in the axial direction of the rotating rod 221. With this coupling structure, the plurality of brush units 223 can be easily formed and the brush units 223 can be formed on the outer circumferential surface of the rotating rod 221 even in a complicated spiral shape.

[0100] Further, the brush unit 223 including the base portion 223a and the brush portion 223b may be separately fabricated. Accordingly, a plurality of bristles can be mounted on the flat base portion 223a at once without being individually planted in the outer circumferential surface of the rotation shaft 221. This may result in reducing time and costs required for mounting the bristles with more dense and uniform intervals.

[0101] In the meantime, the brush unit 223 of this embodiment may further include a blade 223c similar to that in the foregoing embodiment. The blade 223c may be disposed at the rear side R′ that is an opposite direction of the rotating direction corresponding to the front side F′ so as to be brought into contact with the brush portion 223b during the rotation of the brush assembly 220. The blade 223c can prevent an introduction of hair and the like into the brush portion 223b, as illustrated in the foregoing embodiment.

[0102] In addition, in this embodiment, by further providing the blade 223c, an effect of further providing on the base portion 223a an adhesion surface on which the brush portion 223b can be fixed is obtained. That is, as the additional adhesion surfaces are provided by the blades 223c in the radial direction of the rotating rod 221, the brush portions 223b with dense and uniform intervals can be firmly provided.

[0103] Also, similar to the foregoing embodiment, the brush unit 223 may be further provided with a support member 223d to support the blade 223c. In addition, the support member 223d and the brush portion 223b may also be made of the same material so as to perform the same function.

[0104] Particularly, in this embodiment, the support member 223d and the brush portion 223b may be integrally formed with each other, and or may be connected to cover an end portion of the base portion 223a of the blade 223c. As illustrated in FIG. 7, the plurality of bristles extending in a U-shape in the radial direction of the rotating rod 221 may surround the blade 223c, and the surrounded end portion may be pressed to be coupled to the base portion 223a. This may allow the brush unit 223 to be formed at once.

[0105] Meanwhile, the brush assembly 220 according to another embodiment of the present invention may additionally require a process of assembling the rotating rod 221 and the cover 222 by the addition of the plurality of covers 222. For convenience of this assembling process, a hook coupling manner may be applied.

[0106] Specifically, as illustrated in FIG. 6, the cover 222 may be provided with a hook portion (or hook) 222e, and the rotating rod 221 may be provided with a hook receiving portion (or recess) 221e. The hook portion 222e may protrude from an inner circumferential surface of the cover 222 toward the rotating rod 221 and may be provided with a hook surface facing the inner circumferential surface of the cover 222 at an end thereof. The hook receiving portion 221e may be formed on an outer circumferential surface of the rotating rod 221 so that the hook portion 222e is inserted therein and a hook surface may be locked to prevent separation of the cover 222.

[0107] The hook portion 222e and the hook receiving portion 221e may facilitate the assembling process of the brush assembly 220 without a coupling member such as a separate screw or the like.

[0108] In addition, an end cover 225 may be provided on at least one end portion of the rotating rod 221 to firmly seal and couple the brush assembly 220. As illustrated in FIG. 6, the end cover 225 may be formed in a circular shape so as to cover the end portion of the rotating rod 221, and cover end portions of the plurality of covers 222 at once. In particular, the end cover 225 may support the previously-inserted brush units 223 in the axial direction of the rotating rod 221 so as to prevent the brush units 223 from being separated from the brush slits 224.

[0109] The brush assembly 220 may further include a connection pin 226 as illustrated in FIG. 6. The connection pin 226 may be elastically supported by the elastic member 227 toward the inside of the rotating rod 221, and protrude in the axial direction of the rotating rod 221 through a through hole 225g which is formed through the end cover 225. At this time, the connection pin 226 may be provided with a locking portion 226g which is engaged with an inner surface of the end cover 225, and may be positioned so as not to be completely separated from the through hole 225g by use of an elastic member 227. The connection pin 226 may be pressed into the end cover 225 when the brush assembly 220 is mounted in the suction unit, and then protruded by elastic force when the brush assembly 220 is inserted into a proper position supported by the suction unit so as to be rotatably coupled.

[0110] Meanwhile, in this embodiment, each of the plurality of covers 222 may have a shape in which at least two spiral shapes are combined in the axial direction of the rotating rod 221. By the plurality of covers 222, the brush slit 224 may also extend into a shape of being bent at least once on the outer circumferential surface of the rotating rod 221.

[0111] FIG. 8 is a perspective view illustrating a state in which the brush units 223 illustrated in FIG. 6 are separately fabricated. As illustrated in FIG. 8, the brush units 223 may be easily fabricated in a shape of extending in one direction during a separate fabricating process. The brush unit 223 may be made of an elastic material to be easily inserted into the brush slit 224 even when the brush slit 224 is not linearly formed.

[0112] That is, the base portion 223a and the brush portion 223b of the brush unit 223 are made of an elastic material. Accordingly, even when the brush unit 223 is inserted into the brush slit 224 which has a bent shape, the brush unit 223 may be inserted into the brush slit 224 with its shape deformed. Thus, the brush unit 223 does not have to separately be fabricated to correspond to various shapes, and can be fabricated according to a process by which bristles can be arranged densely. In addition, the brush assembly 220 may be formed in a shape having various brush arrangements as well as the shape of the brush assembly 220 illustrated in FIG. 6.

[0113] The foregoing embodiments are merely given of those embodiments for practicing a vacuum cleaner according to the present invention. Therefore, the present invention is not limited to the above-described embodiments, and it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the scope of the present invention.