US20080134463A1

US20080134463A1 - Rotation brush driving apparatus for vacuum cleaner

Info

Publication number: US20080134463A1
Application number: US11/796,327
Authority: US
Inventors: Min-jo Choi; Tae-gwang Kim
Original assignee: Samsung Gwangju Electronics Co Ltd
Current assignee: Samsung Electronics Co Ltd
Priority date: 2006-12-08
Filing date: 2007-04-27
Publication date: 2008-06-12
Also published as: AU2007202066A1; GB0709721D0; CA2587132A1; GB2444571A

Abstract

The present disclosure relates to a rotation brush driving apparatus for a vacuum cleaner capable of selectively transmitting power of a motor to a rotation brush in a simple structure. The rotation brush driving apparatus for a vacuum cleaner according to the present disclosure includes a motor for generating suction force; a rotation brush; a belt for transmitting rotation force of the motor to the rotation brush; and a driving selection unit installed rotatably around the rotation shaft of the motor, for selectively transmitting the rotation force of the motor to the rotation brush by selectively contacting the belt with the rotation shaft of the motor.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the benefit under 35 U.S.C. §119(a) from Korean Patent Application No. 10-2006-0124981 filed Dec. 8, 2006, in the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference in its entirety.

BACKGROUND OF THE INVENTION

1. Field of the Invention
The present disclosure relates to a vacuum cleaner, and more particularly, to a rotation brush for the vacuum cleaner.
2. Description of the Related Art
Generally, a vacuum cleaner is provided with a rotation brush for clearly removing dust attached to a surface to be cleaned such as a carpet and other surfaces. The rotation brush is rotated by force transmitted from a motor.
However, in a case that the rotation brush rotates in contact with a bare floor, the rotation brush may damage the bare floor. In other words, the rotation brush increases a roughness of a smoothly processed surface of the bare floor and decreases a gloss and a sense of beauty in external appearance.
It is therefore necessary to operate the rotation brush selectively according to user's intention so that the rotation brush is rotated in a case of cleaning a surface to be cleaned having much dust thereon such as a carpet and the rotation brush is not rotated in a case of cleaning a smooth surface to be cleaned such as a bare floor.
FIG. 1 is a perspective view of a conventional upright vacuum cleaner with a rotation brush.
Referring to FIG. 1, the upright vacuum cleaner 1 includes a cleaner body 3 formed with a hand grip 2 at an upper side thereof, a suction nozzle 5 placed at a lower end of the cleaner body 3 for drawing-in outside air and dirt together and a traveling wheel 7 installed at a lower side of the cleaner body 3 for moving the cleaner body 3 over the surface.
Inside the cleaner body 3 is installed a dust collecting apparatus (not shown) for removing dirt from the air drawn-in through the suction nozzle 5 and discharging cleaned air.
In addition, in front of the suction nozzle 5 is rotatably installed a rotation brush 8 having a brush helically formed at an outside surface thereof and, thus, capable of effectively brushing off dust attached to a surface to be cleaned such as a carpet. The rotation brush 8 is driven by a brush motor (not shown) which is separate from a main motor (not shown) for rotating a suction fan in the cleaner body 3 and generating suction force for drawing-in the dirt.
Thus, user can control the rotation brush 8 not to rotate in a case of cleaning a bare floor or to rotate in a case of cleaning a carpet by operating a switch for turning on/off the brush motor.
However, there is a problem that cost for manufacturing the vacuum cleaner is increased as the vacuum cleaner with the above described structure is provided with the brush motor for driving the rotation brush 8 besides the main motor for generating suction force.
In addition, there is another problem that structure of the cleaner body is complicated and size of the cleaner body is large as the main motor and the brush motor are installed in the cleaner body 3.

SUMMARY OF THE INVENTION

The present disclosure has been developed in order to overcome the above drawbacks and other problems associated with the conventional arrangement. An aspect of the present disclosure is to provide a rotation brush driving apparatus for a vacuum cleaner capable of selectively rotating a rotation brush using power of a motor for generating suction force in a simple structure.
The above aspect and/or other feature of the present disclosure can substantially be achieved by providing a rotation brush driving apparatus for a vacuum cleaner, which includes a motor for generating suction force; a rotation brush; a belt for transmitting rotation force of the motor to the rotation brush; and a driving selection unit installed rotatably around a rotation shaft of the motor, for selectively transmitting the rotation force of the motor to the rotation brush by selectively contacting the belt with the rotation shaft of the motor.
The driving selection unit includes a bar shaped selection link installed rotatably around the rotation shaft of the motor; and an idle pulley installed rotatably at an end of the selection link and supporting the belt; wherein the rotation shaft of the motor comes to contact with the belt and thus the rotation force of the motor is transmitted to the rotation brush by pulling the selection link. In addition, the rotation shaft of the motor is separated from the belt and thus the rotation force of the motor is not transmitted to the rotation brush by pushing the selection link in the opposite direction.
The driving selection unit may further include a fixing unit for fixing the selection link to a predetermined position.
The fixing unit includes a fixing shaft having a front end formed to selectively project to a side surface of the selection link; a guiding holder for guiding the fixing shaft to move perpendicular to the side surface of the selection link and installed on the selection link so that a rear end of the fixing shaft is projected; and an elastic member installed inside the guiding member and elastically supporting the fixing shaft.
In addition, the rotation brush driving apparatus for a vacuum cleaner may further includes a link supporting shaft for supporting the selection link so as to rotate in relation to the rotation shaft of the motor.
The link supporting shaft is installed on a supporting bracket which is installed at a front of the motor.
The above aspect and/or other feature of the present disclosure can also substantially be achieved by providing a rotation brush driving apparatus for a vacuum cleaner, which includes a rotation brush provided with a pulley; a belt installed to transmit force by contacting with the pulley of the rotation brush; a motor for generating suction force having a rotation shaft which projects to a side; a link supporting shaft formed with a hole through which the rotation shaft of the motor passes; a supporting bracket for supporting the link supporting shaft and installed at a side of the motor; and a driving selection unit installed rotatably on the link supporting shaft, for selectively transmitting the rotation force of the motor to the rotation brush by selectively contacting the belt with the rotation shaft of the motor thereby allowing the rotation brush to rotate.
The driving selection unit includes a bar shaped selection link installed rotatably on the link supporting shaft; and an idle pulley installed rotatably at an end of the selection link and supporting the belt; wherein by the pulling the selection link in one direction, the belt is moved by the idle pulley and thus the belt comes to contact with the rotation shaft of the motor, the idle pulley and the pulley of the rotation brush.
In addition, by the idle pulley by pushing the selection link in the opposite direction, the belt is moved and, thus, the belt comes to contact with the idle pulley and the pulley of the rotation brush while separated from the rotation shaft of the motor.
Other objects, advantages and salient features of the disclosure will become apparent from the following detailed description, which, taken in conjunction with the annexed drawings, discloses preferred embodiments of the disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

These and/or other aspects and advantages of the disclosure will become apparent and more readily appreciated from the following description of the exemplary embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a perspective view illustrating a conventional vacuum cleaner;

FIG. 2 is a perspective view illustrating a suction nozzle of a vacuum cleaner having a rotation brush driving apparatus according to an exemplary embodiment of the present disclosure;

FIG. 3 is an exploded perspective view illustrating the rotation brush driving apparatus of the vacuum cleaner of FIG. 2;

FIG. 4 is a perspective view illustrating a selection link when force of the motor is transmitted to the rotation brush by the rotation brush driving apparatus of the vacuum cleaner of FIG. 2;

FIG. 5 is a perspective view illustrating a selection link in a case that the force of the motor is not transmitted to the rotation brush by the rotation brush driving apparatus of the vacuum cleaner of FIG. 2;

FIG. 6A is a partial sectional view illustrating a state that a fixing unit is inserted into a fixing hole and thus the selection link is fixed in the rotation brush driving apparatus of the vacuum cleaner of FIG. 2;

FIG. 6B is a partial sectional view illustrating a state that the fixing unit is removed from the fixing hole and thus the selection link is movable in the rotation brush driving apparatus of the vacuum cleaner of FIG. 2.

Throughout the drawings, like reference numerals will be understood to refer to like parts, components and structures.

DETAILED DESCRIPTION OF THE EXEMPLARY EMBODIMENTS

Hereinafter, certain exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.
The matters defined in the description, such as a detailed construction and elements thereof, are provided to assist in a comprehensive understanding of the disclosure. Thus, it is apparent that the present disclosure may be carried out without those defined matters. Also, well-known functions or constructions are omitted to provide a clear and concise description of exemplary embodiments of the present disclosure.
FIG. 2 illustrates a case that a rotation brush driving apparatus 100 of a vacuum cleaner according to the present disclosure is installed in a suction nozzle 10 of an upright vacuum cleaner. FIG. 2 illustrates not cleaner body of the upright vacuum cleaner, but only the suction nozzle 10. A structure of the cleaner body of the upright vacuum cleaner using the rotation brush driving apparatus 100 according to the present disclosure is similar to the conventional art and therefore will not be described herein.
Referring to FIG. 2 to FIG. 4, the rotation brush driving apparatus 100 of a vacuum cleaner according to the present disclosure includes a motor 110, a rotation brush 120, a belt 130, and a driving selection unit 140.
The motor 110 is installed inside the cleaner body (not shown) of the vacuum cleaner and a rotation shaft 111 thereof is projected from a side thereof. In addition, the motor 110 acts to generate suction force so that the vacuum cleaner can draw-in dirt. In other words, the motor 110 used in the rotation brush driving apparatus 100 of a vacuum cleaner according to the present disclosure is the same as the motor for generating the suction force in the vacuum cleaner. Thus, the rotation shaft 111 of the motor 110 also rotates when cleaning using the vacuum cleaner.
The rotation brush 120 is rotatably installed in the suction nozzle 10 and a plurality of brushes 122 are formed helically on a cylindrical body 121. A pulley 124 is formed at a side of the rotation brush 120.
The belt 130 is for transmitting rotation force of the motor 110 to the rotation brush 120 and is installed between the pulley 124 of the rotation brush 120 and an idle pulley 145 of the driving selection unit 140 which will be described herein after.
The driving selection unit 140 is for transmitting the rotation force of the motor 110 to the rotation brush 120 selectively by user's operation and includes a selection link 141, the idle pulley 145, and a fixing unit 150.
The selection link 141 is installed rotatably around the rotation shaft 111 of the motor 110 and formed in a bar shape in which two arms extend to both sides from a rotation center portion 141 a. A rotation hole 143 through which the rotation shaft 111 of the motor 110 passes is formed at the rotation center portion 141 a of the selection link 141.
The selection link 141 is preferably supported by a link supporting shaft 160 so that the selection link 141 can rotate around a rotation center of the rotation shaft 111 of the motor 110 without interference with the rotation shaft 111 of the motor 110. The link supporting shaft 160 is formed in a hollowed cylindrical shape and is inserted in the rotation hole 143 of the selection link 141. The selection link 141 can therefore rotate around the link supporting shaft 160. A link flange 161, for fixing the link supporting shaft 160, is formed at an end of the link supporting shaft 160. The link flange 161 is formed with a plurality of fixing holes 161 a. The rotation shaft 111 passes through an inner hole 163 of the link supporting shaft 160. The selection link 141 can therefore rotate while sliding on an outer surface of the link supporting shaft 160 without interference with the rotation shaft 111 of the motor 110.
Though the link supporting shaft 10 may be installed on the motor 110, in the present embodiment the link supporting shaft 10 is installed on a separate supporting bracket 170. The supporting bracket 170 is installed at a front of the motor 110, that is, in a direction to which the rotation shaft 111 of the motor 110 projects, and formed with a shaft hole 171 through which the link supporting shaft 160 passes. The link supporting shaft 160 is installed in the supporting bracket 170 using a plurality of bolts 164. For this end, a plurality of bolt holes 172 for fixing the link supporting shaft 160 is formed around the shaft hole 171 of the supporting bracket 170.
The idle pulley 145 is rotatably installed at an end of the selection link 141 and supports the belt 130 so as to move the belt 130 according to the rotation of the selection link 141. The idle pulley 145 is rotatably installed on a pulley shaft 146 installed in a pulley hole 144 formed in the end of the selection link 141. The idle pulley 145 therefore rotates around the pulley shaft 146 together with the belt 130 when the belt 130 rotates.
At this time, rotation centers of the rotation brush 120, the selection link 141 and idle pulley 145 are set to satisfy the following condition. That is, when the selection link 141 rotates by a predetermined angle in a first direction around the rotation shaft 111 of the motor 110, the belt 130 is moved by the idle pulley 145 and thus the inner surface of the belt 130 is in contact with all of the rotation shaft 111 of the motor 110, the idle pulley 145 and the pulley 124 of the rotation brush 124 and the belt 130 is applied with tension. If the belt 130 comes to contact with all of the rotation shaft 111 of the motor 110, the idle pulley 145 and the pulley 124 of the rotation brush 124, the rotation force of the motor 110 is transmitted through the belt 130 to the rotation brush 120.
In addition, if the selection link 141 rotates by a predetermined angle in the opposite direction around the rotation shaft 111 of the motor 110, the idle pulley 145 moves the belt 130 and thus the inner surface of the belt 130 is in contact with only the idle pulley 145 and the pulley 124 of the rotation brush 120 and is separated from the rotation shaft 111 of the motor 110. If the belt 130 is not in contact with the rotation shaft 111 of the motor 110, the rotation force of the motor 110 does not transmitted to the rotation brush 120.
For this end, in the present embodiment, the idle pulley 145, the rotation shaft 111 of the motor 110 and the pulley 124 of the rotation brush 120 are located substantially in a line so that the belt 130 is not in contact with the rotation shaft 111 of the motor 110 in the case that the rotation force is not transmitted, while in the case that the rotation force is transmitted the idle pulley 145 is located below the rotation shaft 111 of the motor 110 so that the rotation shaft 111 of the motor 110 is in contact with the inner surface of the belt 130.
In one embodiment, an end of the selection link 141 is formed as a hand grip 142 so that the user can easily rotate the selection link 141. In addition, in order to easily operate the selection link 141, it is preferable that a length from the rotation center of the selection link 141 to an end 142 a of the hand grip 142 is longer than a length from the rotation center of the selection link 141 to where the idle pulley 145 is installed. Furthermore, it is preferable that an upper portion of the hand grip 142 is exposed to an upside of a cover 11 of the suction nozzle 10 in which the rotation brush driving apparatus 100 is installed.
The fixing unit 150 is for fixing the selection link 141 to a predetermined position and includes a fixing shaft 151, a guiding holder 153, and an elastic member 155.
The fixing shaft 151 is assembled inside of the guiding holder 153 and formed so that its front end 151 a is selectively projected or recessed for a side surface of the selection link 141. A supporting sill 151 b for supporting the elastic member 155 is formed on the fixing shaft 151. The projected front end 151 a of the fixing shaft 151 is inserted in one of fixing holes 181 and 182 formed on the supporting bracket 170. The two fixing holes 181 and 182 are formed on the supporting bracket 170.
The first fixing hole 181 is formed in a position at which the selection link 141 can be fixed so that the rotation force of the motor 110 is transmitted to the rotation brush 120 through the belt 130. In other words, when the selection link 141 is fixed to the first fixing hole 181, the belt 130 comes to contact with the rotation shaft 111 of the motor 110 and thus the rotation force of the motor 110 is transmitted to the rotation brush 120. The second fixing hole 182 is formed in a position at which the selection link 141 can be fixed so that the rotation force of the motor 110 is not transmitted to the rotation brush 120. In other words, when the selection link 141 is fixed to the second fixing hole 182, the belt 130 does not come to contact with the rotation shaft 111 of the motor 110 and thus the rotation force of the motor 110 is not transmitted to the rotation brush 120.
In the present embodiment, the first fixing hole 181 and the second fixing hole 182 form substantially a right angle on the shaft hole 171. In this case, the selection link 141 is a shape of a bar, which is bent on the rotation hole 143. At this time, the degree that the selection link 141 is bent can be properly determined according to specifications and arrangements of the idle pulley 145, the pulley 124 of the rotation brush 120, and the rotation shaft 111 of the motor 110.
The guiding holder 153 is installed at a side surface of a side of the selection link 141 that the hand grip 142 is formed and guides so that the fixing shaft 151 can move perpendicularly to the side surface of the selection link 141. Thus, the guiding holder 153 is formed in a hollowed cylindrical shape and a holder flange 154 for fixing the guiding holder 153 to the selection link 141 is formed at a front end of the guiding holder 153. At each of the holder flange 154 and the selection link 141 are formed two bolt holes 154 a and 149 for fixing the guiding holder 153 to the selection link 141. Between the two bolt holes 149 formed at the selection link 141, a through hole 148 through which the front end 151 a of the fixing shaft 151 passes is formed. In addition, a guiding hole 153 a through which a rear end 151 c of the fixing shaft 151 can project is formed at a rear end f the guiding holder 153. A fixing button 157 may be installed at the rear end 151 c of the fixing shaft 151 so that the user can easily pull the fixing shaft 151.
The elastic member 155 is installed inside the guiding holder 153 and elastically supports the fixing shaft 151. In other words, the elastic member 155 is installed inside the guiding holder 153 with a state that it is inserted on the rear end 151 c of the fixing shaft 151. Thus, when the user pulls the fixing shaft 151, which projects to a rear end of the guiding holder 153, the elastic member 155 is pressed by the supporting sill 151 b while the fixing shaft 151 moves rearward, and thus the front end 151 a of the fixing shaft 151 is removed from the fixing holes 181 and 182. When the fixing shaft 151 is released, the fixing shaft 151 moves forward due to the restoring force of the elastic member 155 and thus the front end 151 a of the fixing shaft 151 is inserted into the fixing holes 181 and 182.
Operation of the rotation brush driving apparatus 100 of a vacuum cleaner according to the present disclosure with the above described structure will be described herein after with reference to FIG. 4 and FIG. 5.
The user check where the selection link 141 of the rotation brush driving apparatus 100 is positioned in a case that the user intends to operate the rotation brush 120 to clean a carpet. If the selection link 141 is in a state of being fixed in the first fixing hole 181, the user performs cleaning in the state. However, if the selection link 141 is in a state of being fixed in the second fixing hole 182, the user moves the selection link to fix it into the first fixing hole 181.
The fixing button 157 is firstly pulled in order to move the selection link 141. By pulling the fixing button 157, the fixing shaft 151 is moved rearward in an inside of the guiding holder 153 and the front end 151 a of the fixing shaft 151 is removed from the second fixing hole 182, thereby resulting a state shown in FIG. 6B. In this state, the user grips the hand grip 142 and rotates the selection link 141 toward the first fixing hole 181. When the selection link 141 is rotated by the predetermined angle toward the first fixing hole 181 around the link supporting shaft 160, the front end 151 a of the fixing shaft 151 comes to a position of the first fixing hole 181. In this position, the front end 151 a of the fixing shaft 151 is automatically inserted into the first fixing hole 181 by the restoring force of the elastic member 155. FIG. 6A illustrates the state that the front end 151 a of the fixing shaft 151 is inserted in the first fixing hole 181. When the front end 151 a of the fixing shaft 151 is inserted in the first fixing hole 181, the selection link 141 comes to a fixed state in which the selection link 141 is not rotated by the external force.
During the movement of the selection link 141 toward the first fixing hole 181, the idle pulley 145 is moved downward together with the belt 130. When the selection link 141 is fixed into the first selection hole 181, the idle pulley 145 is located below the rotation shaft 111 of the motor 110 and the rotation shaft 111 of the motor 110, which was separated from the belt 130, comes in to contact with the inner surface of the belt 130. In other words, the belt 130 is in contact with all of the pulley 124 of the rotation brush 120, the idle pulley 145 and the rotation shaft 111 of the motor 110 and thus is applied with a predetermined tension. In this state, upon rotation of the rotation shaft 111 of the motor 110, the belt 130 is rotated by the rotation shaft 111 of the motor 110 and then the rotation brush 120 is rotated by the belt 130. The rotation brush 120 therefore rotates in high speed to clean dirt on a surface to be cleaned such as a carpet.
The rotation brush 120 should not rotate in a case that the user intends to clean a bare floor. That is, the selection link 141, which is fixed in the first fixing hole 181, should be moved and fixed to the second fixing hole 182 when rotation of the rotation brush 120 is desired.
For this end, firstly, the selection link 141 is moved to the second fixing hole 182 after the front end 151 a of the fixing shaft 151 is removed from the first fixing hole 181 by pulling the fixing button 157. By rotating the selection link 141 by the predetermined angle, the front end 151 a of the fixing shaft 151 is automatically inserted into the second fixing hole 182 and thus the selection kink 141 is fixed into the second fixing hole 182.
As the selection link 141 is rotated toward the second fixing hole 182, the idle pulley 145 is moved upward together with the belt 130. After that, the selection link 141 is fixed in the second fixing hole 182 so that the idle pulley 145 is located at a position in which the idle pulley 145 is approximately in a line together with the pulley 124 of the rotation brush 120 and the rotation shaft 111 of the motor 110. In this position, the inner surface of the belt 130 is not in contact with the rotation shaft 111 of the motor 110. Thus, even if the rotation shaft 111 of the motor 110 rotates, the belt 130 does not rotate and thus the rotation brush 120 also does not rotate. In other words, the rotation force of the motor 110 is not transmitted to the rotation brush 120 even if the motor 110 operates for generating the suction force when the selection link 141 is fixed in the second fixing hole 182.
According to the rotation brush driving apparatus 100 of the present disclosure, the user can select two operation mode of the rotation brush 120 by rotating the hand grip 142 by predetermined angle after pulling the fixing button 157. In other words, the user may select a rotation mode in which force of the motor 110 is transmitted and thus the rotation brush 120 rotates or select a stop mode in which force of the motor 110 is cut off and thus the rotation brush 120 does not rotate, only by using the hand grip 142 and the fixing button 157, if necessary. Thus, it is very simple and convenient for the user to transmit or cut off the force of the motor 110 to the rotation brush 120.
The rotation brush driving apparatus 100 according to the present disclosure is applied to an upright vacuum cleaner in the above description, however this does not limit the kind of the vacuum cleaner to which the present disclosure can be applied.
As described above, with rotation brush driving apparatus 100 according to the present disclosure, a separate motor for rotating the rotation brush is not necessary as the rotation brush can be rotated using the motor for generating the suction force. Thus, the cost of materials can be reduced.
In addition, rotation brush driving apparatus 100 according to the present disclosure has a simple structure as the force of the motor is selectively transmitted to the rotation brush using a single belt, a pulley and a selection lever. Thus, it is easy to assemble and it is possible to reduce the time taken to assemble.
While the exemplary embodiments of the present disclosure have been described, additional variations and modifications of the exemplary embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims shall be construed to include both the above embodiments and all such variations and modifications that fall within the spirit and scope of the disclosure.

Claims

1. A rotation brush driving apparatus for a vacuum cleaner, comprising:

a motor for generating suction force;

a rotation brush;

a belt for transmitting rotation force of the motor to the rotation brush; and

a driving selection unit installed rotatably around a rotation shaft of the motor, for selectively transmitting the rotation force of the motor to the rotation brush by selectively contacting the belt with the rotation shaft of the motor.

2. The apparatus of claim 1, wherein the driving selection unit comprises:

a bar shaped selection link installed rotatably around the rotation shaft of the motor; and

an idle pulley installed rotatably at an end of the selection link and supporting the belt,

wherein the rotation shaft of the motor comes to contact with the belt and thus the rotation force of the motor is transmitted to the rotation brush by pulling the selection link.

3. The apparatus of claim 2, wherein the rotation shaft of the motor is separated from the belt and thus the rotation force of the motor is not transmitted to the rotation brush by pushing the selection link in the opposite direction.

4. The apparatus of claim 2, wherein the driving selection unit further comprises a fixing unit for fixing the selection link to a predetermined position.

5. The apparatus of claim 4, wherein the fixing unit comprises

a fixing shaft having a front end formed to selectively project to a side surface of the selection link;

a guiding holder for guiding the fixing shaft to move perpendicular to the side surface of the selection link and installed on the selection link so that a rear end of the fixing shaft is projected; and

an elastic member installed inside the guiding member and elastically supporting the fixing shaft.

6. The apparatus of claim 2, further comprising a link supporting shaft for supporting the selection link so as to rotate in relation to the rotation shaft of the motor.

7. The apparatus of claim 6, wherein the link supporting shaft is installed on a supporting bracket which is installed at a front of the motor.

8. A rotation brush driving apparatus for a vacuum cleaner, comprising:

a rotation brush provided with a pulley;

a belt installed to transmit force by contacting with the pulley of the rotation brush;

a motor for generating suction force having a rotation shaft which projects to a side;

a link supporting shaft formed with a hole through which the rotation shaft of the motor passes;

a supporting bracket for supporting the link supporting shaft and installed at the side of the motor; and

a driving selection unit installed rotatably on the link supporting shaft, for selectively transmitting the rotation force of the motor to the rotation brush by selectively contacting the belt with the rotation shaft of the motor thereby allowing the rotation brush to rotate.

9. The apparatus of claim 8, wherein the driving selection unit comprises

a bar shaped selection link installed rotatably on the link supporting shaft; and

wherein by the pulling the selection link in one direction, the belt is moved by the idle pulley and thus the belt comes to contact with the rotation shaft of the motor, the idle pulley and the pulley of the rotation brush.

10. The apparatus of claim 9, wherein by the idle pulley by pushing the selection link in the opposite direction, the belt is moved and thus the belt comes to contact with the idle pulley and the pulley of the rotation brush while separated from the rotation shaft of the motor.

11. The apparatus of claim 9, wherein the driving selection unit further comprises a fixing unit for fixing the selection link to a predetermined position.

12. The apparatus of claim 11, wherein the fixing unit comprises

13. The apparatus of claim 12, wherein the supporting bracket comprises at least one fixing hole in which the supporting shaft of the fixing unit is inserted.