KR102015320B1 - Vacuum Cleaner - Google Patents

Abstract

The vacuum cleaner according to the embodiment of the present invention includes a suction head including a cover and a bottom plate having a suction port for sucking air on the surface to be cleaned, the bottom plate being rotatably coupled to the cover, and the bottom plate is formed at the time of advancing the suction head. Direction and the other direction when the suction head is reversed. The apparatus further includes a brush base provided to be movable up and down between the cover and the bottom plate and having a brush. The brush base includes a marker that is exposed to the outside of the cover to form at least a portion of the appearance of the suction head.

Description

Vacuum Cleaner

The present invention relates to a cleaner for separating and collecting dirt from air sucked by the suction force of a fan motor, and more particularly, to a suction head of a cleaner that is in close contact with the surface to be cleaned to suck air.

In general, a vacuum cleaner includes a fan motor that generates suction force, a suction head that is in close contact with the surface to be cleaned, and sucks air by the suction force of the fan motor, and a dust collector that separates and collects dirt from the air sucked through the suction head. It is a home appliance to perform the cleaning.

The fan motor and the dust collector may be accommodated inside the main body, and the suction head may be connected to the main body by an extension tube unit to move on the surface to be cleaned up and down to be cleaned.

The suction head includes a bottom plate on which a suction port is formed, a brush base on which a brush (brush) is installed to prevent damage such as scratches on the bottom plate or the surface to be cleaned by friction between the bottom plate and the surface to be cleaned, It may also include a cover covering the bottom plate and the brush base and forming an appearance.

At this time, the brush base is provided to be elevated as needed, the brush base is lowered when cleaning a relatively hard hard floor, such as the floor, and the brush base is raised when cleaning a relatively soft surface to be cleaned, such as a carpet. Can be. However, since the brush base is covered by the cover and is not exposed to the outside, it is not easy to grasp the position of the brush base.

On the other hand, it is not easy to operate the suction head by the resistance of the surface to be cleaned when performing cleaning while advancing the suction head. That is, the operating force required to advance the suction head is large. In addition, if the rear end of the suction head is lifted while the suction head is being cleaned while the suction head is reversed, the suction force is lowered because the suction port and the surface to be cleaned are not in close contact with each other.

One aspect of the present invention discloses a cleaner having a suction head configured to easily recognize the position of the brush base that is provided to be liftable from the outside.

One aspect of the present invention discloses a cleaner having a suction head configured to reduce the operating force when moving forward.

One aspect of the present invention discloses a cleaner having a suction head configured such that the suction force is not lowered when reversing.

According to the idea of the present invention, the cleaner comprises: a main body; a fan motor provided inside the main body and generating suction force; and a dust collecting device provided inside the main body and collecting dirt; and an extension tube extending from the main body. unit; And a suction head including a cover coupled to the extension tube unit, and a bottom plate having a suction port for sucking air on the surface to be cleaned, and a bottom plate rotatably coupled to the cover. Relative to the cover in a first direction and relative to the cover when the suction head is reversed in a second direction opposite to the first direction.

Here, when the suction head is viewed in a direction in which the front end is located on the left side and the rear end is on the right side, the first direction may be counterclockwise and the second direction may be clockwise.

In addition, one of the cover and the bottom plate may be formed with a rotating shaft, and the other one of the cover and the bottom plate may be formed with a rotating shaft accommodating portion accommodated so as to be freely rotatable.

The bottom plate may be rotated relative to the cover in the first direction by friction with the surface to be cleaned when the suction head is advanced.

In addition, if the cover is rotated in a direction in which the rear end thereof is separated from the surface to be cleaned when the suction head is reversed, the bottom plate is covered by the reaction force of the surface to be cleaned or the weight of the bottom plate applied to the front end. Relative to the second direction.

In addition, the suction port may include a suction space through which air flows, and a partition wall portion protruding toward the cover side to form the suction space.

Here, the partition wall portion includes a sealing portion in close contact with the inlet of the suction duct so that the suctioned air is guided into the suction duct without leaking to the outside of the suction duct, the sealing portion is Nevertheless, it may include a curved portion that is formed to be in close contact with the inlet of the suction duct.

In addition, the partition wall portion may be formed with a stopper protrusion to interfere with the cover to limit the rotation range of the bottom plate.

According to another aspect of the present invention, a cleaner includes a main body; a fan motor provided inside the main body and generating suction force; and a dust collecting device provided inside the main body and collecting dust; Extending tube unit; And a base coupled to the extension tube unit, a bottom plate coupled to the cover having a suction port for sucking air on the surface to be cleaned, and a brush base provided to be elevated between the cover and the bottom plate with a brush. And a suction head, wherein the brush base includes a marker portion exposed to the outside of the cover to form at least a part of an appearance of the suction head.

Here, the marker may be formed at the edge of the brush base.

In addition, the cover may include a cutting groove for receiving the marker.

Here, the marker may be liftable inside the incision groove.

In addition, the suction head has a first mode in which the brush base is raised to the cover side to the maximum so that the bottom plate is in close contact with the surface to be cleaned, and the brush base is at the bottom so that the brush is in close contact with the surface to be cleaned instead of the bottom plate. It may be switchable to any one of the second mode to the maximum descending to the plate side.

Here, the step between the marker and the cover does not exist in the first mode, and the step between the marker and the cover may occur in the second mode.

On the other hand, the cleaner is a lever member rotatably provided to raise and lower the brush base, the cleaner may further include a lever member having a pressing projection for pressing the brush base, and an operation unit for rotating the lever member.

The cleaner may further include an elastic member for elastically supporting the brush base.

According to another aspect of the present invention, a cleaner includes a main body; a fan motor provided inside the main body and generating suction force; and a dust collecting device provided inside the main body and collecting dust; and the main body. An extension tube extending from the; And a cover coupled to the extension tube, a suction plate for sucking air on the surface to be cleaned, a bottom plate rotatably coupled to the cover, and exposed to the outside of the brush and the cover to form at least a part of an appearance of the suction head. And a suction head including a brush base configured to be movable up and down between the cover and the bottom plate, wherein the suction head has the brush base toward the cover side such that the bottom plate is in close contact with the surface to be cleaned. Switchable to any one of a first mode that rises to the maximum and a second mode in which the brush base descends to the bottom plate side to be in close contact with the brushed surface instead of the bottom plate, and the first mode In mode the bottom plate is rotated relative to the cover in a first direction when the suction head is advanced. And the suction head rotates relative to the cover in a second direction opposite to the first direction when the suction head reverses.

According to the spirit of the present invention can easily recognize the position of the brush base is installed brush.

In addition, its operation force can be reduced when advancing the suction head.

Further, when the suction head is reversed, the suction force can be prevented from being lowered even if the rear end of the suction head is lifted away from the surface to be cleaned.

1 is a perspective view showing a cleaner according to an embodiment of the present invention.
FIG. 2 is a view illustrating a suction head of the cleaner of FIG. 1, in which the suction head is in a first mode. FIG.
3 is an exploded perspective view of the suction head of the cleaner of FIG.
4 is an exploded perspective view of another angle of the suction head of the cleaner of FIG.
5 is a cross-sectional view taken along line II of FIG. 2.
FIG. 6 is a view for explaining an operation of rotating the bottom plate when the suction head of the cleaner of FIG. 2 moves forward.
FIG. 7 is a view for explaining an operation in which the bottom plate rotates when the suction head of the cleaner of FIG. 2 moves backward; FIG.
8 is a cross-sectional view taken along line II-II of FIG. 2.
FIG. 9 is a view illustrating a suction head of the cleaner of FIG. 1, in which the suction head is in a second mode.
10 is a cross-sectional view taken along line III-III of FIG. 9;

Hereinafter, preferred embodiments of the present invention will be described in detail.

1 is a perspective view showing a cleaner according to an embodiment of the present invention.

Referring to FIG. 1, the cleaner 1 includes a main motor 20 in which a fan motor 21 forming suction power and a dust collector 22 for separating and collecting dirt from suctioned air are accommodated, and air on a surface to be cleaned. It may include a suction head 100 for sucking, and an extension tube unit 10 connecting the suction head 100 and the main body 20 to guide the air sucked through the suction head 100 to the main body 20. .

The dust collector 22 may be a cyclone method for separating dirt using a centrifugal force or a dust bag method for filtering dirt by passing air through a filter bag, or any other known method for separating dirt. It can be one. The purified air from which dirt is separated through the dust collector 22 is discharged again to the outside of the main body 20.

Extension tube unit 10 is an extension tube 11 having a predetermined rigidity, connecting the extension tube 11 and the main body 20, the extension hose 13 having flexibility and the suction head 100 and the extension tube 11 It may include a connector 11 and a handle 14 for connecting. The connector 11 may be coupled to the suction head 100 so as to be rotated by a predetermined angle, and may have a wheel 15 (FIG. 2) to facilitate the movement of the suction head 100.

The suction head 100 is in close contact with the surface to be cleaned to suck the air from the surface to be cleaned, and the suction head 100 of the cleaner according to the embodiment of the present invention may have a surface to be cleaned depending on the type, material, and state of the surface to be cleaned. It may be switched to any one of the first mode and the second mode for the purpose of preventing damage due to friction or improving suction force.

The first mode is a mode for improving suction power when the surface to be cleaned is a soft fiber material such as carpet, and the second mode is a suction head 100 due to friction with the surface to be cleaned when the surface to be cleaned is a hard material with the floor. Or to prevent damage such as scratches on the surface to be cleaned.

Furthermore, the suction head 100 of the cleaner according to the embodiment of the present invention is configured to facilitate the user to recognize whether the current suction head 100 is the first mode or the second mode.

On the other hand, the suction head 100 of the cleaner according to an embodiment of the present invention is provided to facilitate its operation when the suction head 100 is moved in the first mode used for the carpet, etc., when the suction head 100 is backward It is provided to prevent the phenomenon that the suction force is lowered.

Detailed configuration of the suction head 100 of the cleaner according to the embodiment of the present invention will be described in detail below.

FIG. 2 is a view illustrating a suction head of the cleaner of FIG. 1, in which the suction head is in a first mode. 3 is an exploded perspective view of the suction head of the cleaner of FIG. 2, and FIG. 4 is an exploded perspective view of another angle of the suction head of the cleaner of FIG. 2. 5 is a cross-sectional view taken along line II of FIG. 2. FIG. 6 is a view for explaining an operation of rotating the bottom plate when the suction head of the cleaner of FIG. 2 moves forward, and FIG. 7 is a view for explaining an operation of rotating the bottom plate when the suction head of the cleaner of FIG. 2 moves backward. to be. 8 is a cross-sectional view taken along line II-II of FIG. 2. FIG. 9 is a view illustrating a suction head of the cleaner of FIG. 1, illustrating a state in which the suction head is in a second mode, and FIG. 10 is a cross-sectional view taken along line III-III of FIG. 9.

2 to 10, the suction head 100 is rotatably coupled to the cover 200 with a cover 200 coupled to the connector 11 and a suction port 640 for sucking air from the surface to be cleaned. The base plate 600, the brush 450 having a brush 450 is provided between the cover 200 and the bottom plate 600 to be raised and lowered, the lever to move the brush base 400 The member 300 may include an elastic member 500 that elastically supports the brush base 400.

The cover 200 is disposed above the lever member 300, the brush base 400, the elastic member 500, and the bottom plate 600, and may form most of the appearance of the suction head 100. have.

The cover 200 may include a first rotation shaft 230 and a second rotation shaft accommodation portion 240, and the bottom plate 600 may include a first rotation shaft accommodation portion 620 and a second rotation shaft 610. Can be formed.

The first rotating shaft 230 may be freely rotatable in the first rotating shaft accommodating part 620, and the second rotating shaft 610 may be accommodated rotatably in the second rotating shaft accommodating part 240.

The first rotary shaft 230 and the second rotary shaft 610 are formed on the same line. That is, the extension line of the first rotation shaft 230 and the extension line of the second rotation shaft 610 may be the same straight line and form one rotation shaft. In this configuration, the bottom plate 600 may be relatively rotatable with respect to the cover 200 by an external force.

Meanwhile, the guide bar 260 may be formed in the cover 200, and the guide hole 430 may be formed in the brush base 400. The guide bar 260 may protrude from the cover 200 toward the bottom plate 600 and penetrate the guide hole 430. In this configuration, the brush base 400 may be supported by the guide bar 260 and may be lifted between the cover 200 and the bottom plate 600.

The brush base 400 may be elastically supported by the elastic member 500. The elastic member 500 may be a coil spring. An elastic member mounting portion 440 may be formed on the brush base 400, and a mounting protrusion 630 may be formed on the bottom plate 600. The elastic member mounting portion 440 may be formed on an opposite surface of the guide hole 430.

The elastic member 500 may be mounted between the elastic member mounting portion 440 and the mounting protrusion 630 and may be supported by the guide bar 260 penetrating the guide hole 430.

The position of the brush base 400 elastically biased by the elastic force of the elastic member 500 is the position of the brush base 400 in the first mode of the suction head 100. At this time, the position of the brush base 400 in the first mode of the suction head 100 is the position where the brush base 400 is most raised toward the cover 200.

The brush base 400 may move to the position of the brush base 400 in the second mode of the suction head 100 by the lever member 300. At this time, the position of the brush base 400 in the second mode of the suction head 100 is the position where the brush base 400 descends toward the bottom plate 600 side.

A third rotation shaft 310 may be formed in the lever member 300, and a third rotation shaft accommodation portion 250 may be formed in the cover 200. The third rotation shaft 310 may be accommodated in the third rotation shaft accommodating part 250 to be freely rotatable.

The lever member 300 may be provided with an operation unit 320 capable of rotating the lever member 300, and an opening 220 may be formed in the cover 200 to expose the operation unit 320 to the outside. Therefore, the user can rotate the lever member 300 by pressing the operation unit 320.

When the user presses the manipulation unit 320, the lever member 300 may rotate about the third rotation shaft 310. The operation unit 320 may include a first operation unit 321 for rotating the lever member 300 in one direction, and a second operation unit 322 for rotating the lever member 300 in the other direction.

The lever member 300 may have a pressing protrusion 330 for pressing the brush base 400. The pressing protrusion 330 may be accommodated in the action portion 490 of the brush base 400.

As shown in FIGS. 8 and 10, the brush base 400 may have a first support surface 491, an inclined surface 492, and a second support surface 493. The first support surface 491 may be formed farther from the third rotation axis 310 than the second support surface 493, and the inclined surface 492 may define the first support surface 491 and the second support surface 493. Can connect The first support surface 491, the inclined surface 492, and the second support surface 493 may be pressed by the pressing protrusion 330.

FIG. 8 illustrates a case in which the suction head 100 is in the first mode, that is, the brush base 400 is positioned at the maximum position toward the cover 200, and the pressing protrusion 330 includes the third rotating shaft 310. It may be supported by the first support surface 491 located furthest from the. In this case, the brush base 400 may be elastically supported by the elastic member 500.

FIG. 10 illustrates a case in which the suction head 100 is in the second mode, that is, the brush base 400 is positioned at the lowest position toward the bottom plate 600. As shown in FIG. 10, when the user presses the second operation unit 322 side down (D direction), the lever member rotates about the third rotation shaft 310.

At this time, the pressing protrusion 300 also presses the first support surface 491, the inclined surface 492, and the second support surface 493 while rotating about the third rotation shaft 310. Finally, when the pressing protrusion 300 presses the second support surface 493, the pressing of the pressing protrusion 300 overcomes the elastic force of the elastic member 500, so that the brush base 400 can be fixed in this state. do. Through this operation, the suction head 100 may be switched from the first mode to the second mode.

8 again, when the user presses the first operation unit 321 down (C direction) while the suction head 100 is in the second mode, the lever member rotates about the third rotation shaft 310. The pressing protrusion 300 also rotates around the third rotating shaft 310.

As the pressing protrusion 300 rotates, the brush base 400 is raised by the elastic force of the elastic member 500, and when the pressing protrusion 300 is supported by the first support surface 491, the brush base 400 may be fixed. It becomes possible. Through this operation, the suction head 100 may be switched from the second mode to the first mode.

On the other hand, the bottom plate 600 is formed with a suction port 642 for sucking air on the surface to be cleaned. The suction port 642 includes a suction space 641 through which air flows, and a partition 642 protruding toward the cover 200 to form the suction space 641.

A guide passage 650 for guiding air to the suction port 642 may be formed at the bottom of the bottom plate 600. The guide passage 650 may be formed in the longitudinal direction of the bottom plate 600 on both sides of the suction port 642.

The brush base 400 has a through hole 410 through which the suction port 642 penetrates, and the cover 200 has a suction duct 210 for guiding the air sucked through the suction port 642 to the extension tube unit 10. ) Is formed. The suction port 642 may be connected to the suction duct 210 through the through hole 410.

Meanwhile, as illustrated in FIGS. 5 to 7, the partition wall portion 642 may include the suction duct 210 such that the sucked air is guided into the suction duct 210 without leaking to the outside of the suction duct 210. It includes a sealing portion (643) in close contact with the inlet (211). At this time, the sealing portion 643 may include a curved portion 644 is formed gently.

In this configuration, even when the bottom plate 600 rotates relative to the cover 200, the partition wall part 642 may be in close contact with the inlet 211 of the suction duct 210 and thus sucked through the suction port 640. Air may be guided into the suction duct 210 without leaking.

In addition, the partition portion 642 may be formed with a stopper protrusion 645 to limit the rotation range of the bottom plate 600. The stopper protrusion 645 may limit the rotation range of the bottom plate 600 by interfering with the cover 200. At this time, on the contrary, the stopper protrusion 645 may be formed on the cover 200 and provided to interfere with the bottom plate 600.

The brush base 400 may be provided with a brush 450, a front blocking member 460, and a rear blocking member 470.

The brush 450, the front blocking member 460, and the rear blocking member 470 are the lowest points of the bottom plate 600 when the brush base 400 is in the first mode of the suction head 100 in which the brush base 400 is raised. The lowermost point may be located below the lowermost point of the bottom plate 600 when the brush base 400 is located in the upper side and is in the second mode of the suction head 100 in which the brush base 400 descends.

Therefore, when the suction head 100 is in the first mode, the bottom plate 300 is in contact with the surface to be cleaned, and when the suction head 100 is in the second mode, the brush 450, the front blocking member 460, The rear blocking member 470 may contact the surface to be cleaned and the bottom plate 600 may be spaced apart from the surface to be cleaned.

The front blocking member 460 and the rear blocking member 470 properly seal around the suction port 640 of the bottom plate 600 when the brush base 400 is in the second mode of the suction head 100 in which the brush base 400 descends. In order to reinforce, it may be formed of a soft material to pass through a somewhat large dirt. The front blocking member 460 and the rear blocking member 470 may have passage grooves 461 and 471 through which air may be introduced into the inlet 640.

Next, referring to FIGS. 6 to 7, the operation of the bottom plate 600 of the suction head 100 of the cleaner according to the embodiment of the present invention to rotate relative to the cover 200 will be described in detail.

In FIG. 6 to FIG. 7, F denotes a direction in which the suction head 100 moves forward, and R denotes a direction in which the suction head 100 moves backward. In addition, reference numeral A denotes a direction in which the bottom plate 600 rotates relative to the cover 200 when the suction head 100 moves forward, and reference B indicates a bottom plate when the suction head 100 moves backward. Means the direction 600 is rotated relative to the cover 200.

As shown in FIG. 6, when the brush head 400 is raised and the suction head 100 moves forward in the first mode of the suction head 100 in which the bottom plate 600 directly contacts the surface to be cleaned, The bottom plate 600 may be relatively rotated in the A direction with respect to the cover 200 about the first rotation shaft 230 and the second rotation shaft 610.

The reason why the bottom plate 600 rotates relative to the cover 200 is that the bottom plate 600 is freely rotatable to the cover 200 as described above, and the suction head 100 moves forward when the bottom plate 600 is moved forward. This is because the plate 600 receives frictional resistance from the surface to be cleaned.

As the bottom plate 600 rotates as described above, the rear end of the bottom plate 600 is somewhat spaced apart from the surface to be cleaned, and the frictional resistance of the surface to be cleaned that acts on the bottom plate 600 is reduced. As a result, the operating force required to advance the suction head 100 can be reduced as a result.

As shown in FIG. 7, in the first mode of the suction head 100 in which the brush base 400 is raised to directly contact the surface to be cleaned, the suction head 100 is moved backward (R). When the cover 200 is rotated at a predetermined angle θ with respect to the surface to be cleaned, the bottom plate 600 is in the B direction with respect to the cover 200 about the first and second rotational axes 230 and 610. You can rotate relative.

The reason why the bottom plate 600 rotates relative to the cover 200 is that the bottom plate 600 is coupled to the cover 200 so as to be freely rotatable, and the cover 200 is predetermined with respect to the surface to be cleaned. This is because the reaction force may be applied to the front end of the bottom plate 600 by the surface to be cleaned by rotating at an angle θ. Alternatively, even when the cover 200 is rotated by the weight of the bottom plate 600, the bottom plate 600 does not rotate, so that the bottom plate 600 rotates relative to the cover 200.

As described above, even if the rear end of the cover 200 rotates in the direction away from the surface to be cleaned, the bottom plate 600 is relatively rotated in the opposite direction with respect to the cover 200 while being in close contact with the surface to be cleaned, thereby preventing the suction force from being lowered. Can be.

Next, the mode recognition structure of the suction head 100 of the cleaner according to the embodiment of the present invention will be described with reference to FIGS. 2 to 4 and FIG. 9.

As described above, the suction head 100 of the cleaner according to the embodiment of the present invention has a first mode in which the brush base 400 is raised to the cover 200 side as much as possible, and the brush base 400 is the bottom plate 600. It can be switched to any one of the second mode that descends to the side as much as possible.

In this case, the brush base 400 includes a mark portion 480 exposed to the outside of the cover 200 to form at least a part of the appearance of the suction head 100. The cover 200 is formed with a cutout groove 270 in which the mark portion 480 is accommodated, and the mark portion 480 may be elevated within the cutout groove 270.

The mark portion 480 may be formed to protrude upward from an appropriate portion of the brush base 400, and in one embodiment, the mark portion 480 is formed at the edge of the brush base 400.

As shown in FIG. 2, the marker 480 may be provided so as not to have a step with the cover 200 in the first mode of the suction head 100. On the contrary, as shown in FIG. 9, the marker 480 may be provided to have a step H with the cover 200 in the second mode of the suction head 100. Therefore, the user can readily recognize the current position of the brush base 400 and the mode of the suction head 100 immediately.

Although the technical spirit of the present invention has been described above by specific embodiments, the scope of the present invention is not limited to these embodiments. Various embodiments that can be modified or modified by those skilled in the art without departing from the spirit and spirit of the present invention as defined in the claims will also belong to the scope of the present invention.

1: cleaner 10: extension tube unit
11 connector 12 extension tube
13: extension hose 14: handle
15: wheel 20: body
21: fan motor 22: dust collector
100: suction head 200: cover
210: suction duct 211: suction duct inlet
220: opening 230: first rotating shaft
240: second rotation axis accommodating part 250: third rotation axis accommodating part
260: guide bar 270: incision groove
300: lever member 310: third rotating shaft
320: operation unit 321: first operation unit
322: second operation unit 330: pressing projection
400: brush base 410: through hole
430: guide hole 440: elastic member mounting portion
450: brush 460: front blocking member
461: through groove 470: rear blocking member
471: through groove 480: marker
490: acting portion 491: first support surface
492 inclined surface 493 second support surface
500: elastic member 600: bottom plate
610: second axis of rotation 620: first axis of rotation receiving portion
630: mounting projection 640: inlet
641: suction space 642: partition wall
643: sealing portion 644: curved portion
645: stopper protrusion 646: inlet rear opening
650: guide passage A: direction of rotation when moving forward
B: direction of rotation when reversing C: direction of pressurizing the first control panel
D: 2nd operation part pressurization direction H: step
F: Forward direction R: Reverse direction
θ: rotation angle

Claims (17)

main body;
A fan motor provided inside the main body and generating suction force;
A dust collecting device provided inside the main body and collecting dust;
An extension tube unit extending from the main body; And
A cover coupled to the extension tube unit, a bottom plate having a suction port for sucking air on the surface to be cleaned, and a bottom plate rotatably coupled to the cover, and a brush base provided to be movable up and down between the cover and the bottom plate. Including a suction head,
The bottom plate is rotated relative to the cover in the first direction when the suction head is moved forward and in the second direction which is opposite to the first direction relative to the cover when the suction head is reversed,
The brush base includes a marker that is exposed to the outside of the cover to form at least a portion of the appearance of the suction head. The method of claim 1,
And the suction head is viewed in a direction in which the front end is located on the left side and the rear end is on the right side, the first direction is counterclockwise and the second direction is clockwise. The method of claim 1,
One of the cover and the bottom plate is formed with a rotating shaft,
The other one of the cover and the bottom plate cleaner, characterized in that the rotating shaft receiving portion is formed so that the rotating shaft is freely rotatable. The method of claim 1,
And the bottom plate is rotated relative to the cover in the first direction by friction with the surface to be cleaned when the suction head is advanced. The method of claim 1,
If the cover is rotated in a direction in which the rear end thereof is spaced apart from the surface to be cleaned when the suction head is retracted, the bottom plate is applied to the cover by the reaction force of the surface to be cleaned or its own weight of the bottom plate. And a relative rotation in the second direction. The method of claim 1,
The suction port comprises a suction space through which air flows, and a partition portion protruding toward the cover side to form the suction space. The method of claim 6,
The partition wall portion includes a sealing part in close contact with the inlet of the suction duct so that the air sucked through the suction port is guided into the suction duct without leaking to the outside of the suction duct provided in the cover,
The sealing unit is a cleaner, characterized in that it comprises a curved surface gently formed to be in close contact with the inlet of the suction duct despite the rotation of the bottom plate. The method of claim 6,
The partition wall portion is a cleaner, characterized in that the stopper projection is formed to interfere with the cover to limit the rotation range of the bottom plate. main body;
A fan motor provided inside the main body and generating suction force;
A dust collecting device provided inside the main body and collecting dust;
An extension tube unit extending from the main body; And
A cover coupled to the extension pipe unit, a bottom plate coupled to the cover having a suction port for sucking air from the surface to be cleaned, and a brush base provided with a brush so as to be liftable between the cover and the bottom plate. Suction head; Including,
The brush base includes a marker that is exposed to the outside of the cover to form at least a portion of the appearance of the suction head. The method of claim 9,
The marker is formed on the edge of the brush base cleaner. The method of claim 9,
The cover is a cleaner, characterized in that it comprises a cutting groove for receiving the marker. The method of claim 11,
The marker is a cleaner, characterized in that the lifting in the interior of the incision groove. The method of claim 9,
The suction head has a first mode in which the brush base is raised to the cover side to the maximum so that the bottom plate is in close contact with the surface to be cleaned, and the brush base is placed at the bottom plate side in such a manner that the brush is in close contact with the surface to be cleaned instead of the bottom plate. The vacuum cleaner which can switch to any one of the 2nd modes which descend | fall to the maximum. The method of claim 13,
And a step between the marker and the cover does not exist in the first mode, and a step between the marker and the cover occurs in the second mode. The method of claim 9,
And a lever member rotatably provided to elevate the brush base, the lever member having a pressing protrusion for pressing the brush base and an operation unit for rotating the lever member. The method of claim 9,
The cleaner further comprises an elastic member for elastically supporting the brush base. main body;
A fan motor provided inside the main body and generating suction force;
A dust collecting device provided inside the main body and collecting dust;
An extension tube extending from the main body; And
A brush base having a cover coupled to the extension tube, a suction port for sucking air on the surface to be cleaned, and a bottom plate rotatably coupled to the cover, and having a brush and being provided to be elevated between the cover and the bottom plate. Including a suction head;
The brush base includes a marker that is exposed to the outside of the cover to form at least a portion of the appearance of the suction head,
The suction head has a first mode in which the brush base is raised to the cover side to the maximum so that the bottom plate is in close contact with the surface to be cleaned, and the brush base is placed at the bottom plate side in such a manner that the brush is in close contact with the surface to be cleaned instead of the bottom plate. Can be switched to any one of the second mode that descends to the maximum,
In the first mode the bottom plate is rotated relative to the cover in the first direction when the suction head is advanced and in a second direction opposite to the first direction relative to the cover when the suction head is reversed. Cleaner, characterized in that the relative rotation.

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