JP4309785B2 - Electric vacuum cleaner - Google Patents

Description

  The present invention relates to a vacuum cleaner, and more particularly to a vacuum cleaner capable of reliably cleaning a floor surface near a wall.

  Conventionally, the rotating brush that rotates around the horizontal axis accommodated in the suction base scrapes the dust on the floor forward, mixes the dust that has been lifted into the suction air flow, and sucks it into the dust collector. There is a vacuum cleaner configured to collect dust and exhaust only the suction air flow to the outside (for example, Patent Document 1).

Japanese Patent Laid-Open No. 2000-210234 (FIG. 1)

  However, in the vacuum cleaner of Patent Document 1, since the rotary brush is accommodated in the suction base having a large width direction dimension, when cleaning the floor surface near the wall, one end in the width direction of the suction base comes into contact with the wall surface. The contact of the rotating brush with the floor surface is hindered. For this reason, the floor near the wall cannot be cleaned by the rotating brush.

  Therefore, it is also conceivable to provide a rotating brush that rotates around the vertical axis at a position that protrudes in the vicinity of the front of the inlet base, and to clean the wall floor by this rotating brush. However, although this method is effective for cleaning the dust on the floor near the wall, the dust on the floor far from the wall is swept away from the inlet base by the rotating brush rotating around the vertical axis. Will be.

  Accordingly, an object of the present invention is to provide an electric vacuum cleaner that can reliably clean the floor surface near the wall while not sweeping away dust on the floor surface far from the wall.

  In order to achieve the above object, a vacuum cleaner according to the present invention includes a vacuum cleaner main body capable of traveling on a floor surface, and a mouthpiece base that sucks up dust and collects it on an air flow of inhaled air, The mouthpiece base travels on the floor surface together with the cleaner body, and both ends in the width direction perpendicular to the running direction protrude from both ends in the width direction of the cleaner body. A rotating brush that rotates around a substantially horizontal axis and contacts the floor surface to scrape dust on the floor surface forward; a driving mechanism that rotates the rotating brush around the axis; and the rotating brush And a fluid passage that guides the dust scraped forward from the floor surface to the dust suction port by placing it on an air flow, and the suction base includes at least one end in the width direction of the suction base. Protrudes outward in the width direction from Together, the wall brush that rotates around the axis is provided by the drive mechanism.

According to the electric vacuum cleaner of the present invention, when the suction base moves along with the vacuum cleaner body on the floor surface, the rotary brush is moved around the horizontal axis (around the brush axis) by the drive mechanism provided on the suction base. Rotates and sweeps the floor dust forward. The dust scooped up from the floor is mixed with the air flow sucked into the suction port in the fluid passage. The mixed fluid of the dust and the air flow is guided by the fluid passage to the dust suction port (flows down), sucked into the dust suction port, and sucked out of the suction base.
On the other hand, the brush at the wall rotates around the axis while projecting outward from at least one end of the suction base in the width direction, so that the suction base is in contact with the wall surface or in a state of avoiding contact. The dust on the floor and the dust on the lower end of the wall can be cleaned.

In an aspect of the present invention, the wall-side brush has a shaft portion provided along the axis, and the outer periphery of the shaft portion extends 1 outward in the radial direction of the shaft portion. Or a plurality of brush portions and a hairless portion adjacent to the brush portion in the circumferential direction of the shaft portion, the brush portion being in a state of contacting the floor surface in the axial direction of the shaft portion. As it approaches the outer end portion from the end portion, it is provided obliquely so as to be arranged from the delayed position in the rotational direction of the shaft portion to the advanced position.
According to this aspect, since the brush portion of the brush at the wall is arranged so as to collect dust toward the front inner side of the suction base, even when cleaning the floor surface other than the wall, it is at a position away from the suction base. No dust will be scattered.

In this case, for example, the brush portion of the wall-side brush includes an array of floor surface cleaning brush portions that extend radially outward from the outer peripheral surface of the wall-side brush shaft, and an axial direction from the axially outer end surface of the wall-side brush shaft. A row-like wall surface cleaning brush portion extending outward, and the row-like floor surface cleaning brush portion advances in the rotational direction of the wall-side brush shaft from the row-like wall surface cleaning brush portion toward the opposite side. It is provided on an inclined line that is displaced from the position to the delay position.
According to this, due to the rotation of the brush at the wall, the dust on the floor near the wall is gathered inward from the floor near the wall by an inward inclination angle corresponding to the inclination angle of the inclined line by the row-like floor cleaning brush portion. . Also, the dust at the lower end of the wall surface is swept away by the line-shaped wall surface cleaning brush part and dropped onto the floor surface near the wall, mixed into the dust at the wall surface and separated from the wall side by the line-like floor surface cleaning brush part. Gathered on the floor side. Furthermore, even when the wall brush is away from the wall, it can be gathered toward the rotating brush without sweeping away dust on the floor surface away from the wall.

In the present invention, the dust suction port and the introduction portion for introducing air are provided at a substantially central portion in the width direction of the suction mouth base, and the air introduced from the introduction portion is supplied to the suction mouth base. After guiding to both ends, a duct for guiding to the fluid passage is provided, and the direction of the air flowing through the duct is changed so that it makes a U-turn at the both ends, and then the width of the suction base from both ends of the fluid passage. You may make it flow toward the said dust suction opening provided in the approximate center part of the direction.
In this way, even if the length of the suction base in the width direction is large, the dust scraped up by the wall brush can be efficiently sucked.

In this case, for example, on the suction port base, a blowing unit that applies a pushing force to the suction port on the mixed fluid of the dust and the air flow flowing down the fluid passage, and the discharge air of the blowing unit A duct leading to the fluid passage is provided.
According to this, the discharge air of the air blowing means is guided to the fluid passage by the duct, and the mixed fluid flowing down the fluid passage is made to act as a pushing force to the suction port, so that the mixed fluid is reliably supplied to the suction port. Can be inhaled.

Further, in the present invention, the dust lifted up from the floor surface by the wall-side brush is allowed to rise on the front side of the wall-side brush in the suction base, and the lifted dust is allowed to be guided to the fluid passage. An allowable recess may be formed on the lower surface of the suction base.
In this way, the dust scraped up by the brush by the wall is guided to the fluid passage through the allowable recess, so that the floor surface at the wall can be reliably cleaned.

  On the other hand, a guide channel may be provided on the front side of the wall brush so as to allow the dust lifted from the floor surface by the wall brush to be lifted and guide the lifted dust to the fluid passage. According to this, the dust on the floor surface of the wall scraped up by the brush at the wall is guided from the guide channel to the fluid passage, mixed with the mixed fluid flowing down the fluid passage, and allowed to flow down toward the suction port. Can do. For this reason, it is possible to avoid the problem that the dust on the floor near the wall collides with another member immediately after being scraped from the floor with the brush at the wall and falls again on the floor near the wall.

  According to the present invention, the wall-side floor is provided in a state in which the suction base is prevented from coming into contact with the wall surface by the wall-side brush that rotates around a substantially horizontal axis while protruding outward from at least one end in the width direction of the suction base. Dust on the surface can be reliably cleaned.

Hereinafter, embodiments of a vacuum cleaner according to the present invention will be described with reference to the drawings.
FIG. 1 is an overall perspective view showing an embodiment of a vacuum cleaner.
The vacuum cleaner shown in FIG. 1 includes a cleaner body 1 and a suction base 2.
The vacuum cleaner main body 1 is configured to be able to travel on the floor surface 3, and a suction mouth base 2 is provided at the rear of the vacuum cleaner main body 1 so as to follow the cleaner main body 1 and allow the floor surface 3 to travel. It is connected. The vacuum cleaner body 1 is also equipped with a dust collection unit 4 that collects dust and air suction means (not shown) that communicates with the inside of the dust collection unit 4 through a filter (not shown). Has been.

  The suction mouth base 2 has such a size that both end portions 2L, 2R in the width direction (arrow X) perpendicular to the traveling direction (arrow Y) of the cleaner body 1 slightly protrude from both ends in the width direction of the cleaner body 1. As shown in FIG. 2, a horizontally long base portion 20 that is long in the width direction and a cover 21 that covers the base portion 20 detachably from above are provided. As shown in FIG. 1, the base portion 20 and the cover 21 are surrounded by a bumper 5 in an assembled state in which the base portion 20 is covered with the cover 21.

  As shown in FIG. 2, the base portion 20 of the suction base 2 is entirely closed by a stepped lid plate 22 and opened at the lower side. The stepped lid plate 22 has a front blocking portion 22a having an L-shaped cross section and a rear blocking portion 22b having an L-shape that is opposite in cross section. The two portions 22a and 22b are distributed back and forth with a step portion 22c provided in a straight line extending substantially along the entire length in the width direction X at a substantially central portion in the traveling direction Y of the base portion 20, and the front blocking portion 22a. Is set higher than the level (height) of the rear blocking portion 22b.

  On the lower side of the front blocking part 22a, a partition plate 22d is provided oppositely with a gap, and the duct 6 having a rectangular closed cross-section structure surrounded by the front blocking part 22a, the partition plate 22d, and the stepped part 22c is in the width direction. It is provided so as to extend substantially the entire length. Further, a brush accommodating chamber 7 is provided below the rear blocking portion 22 b in parallel with the duct 6. A mixed fluid passage 8 shown in FIG. 3 is provided on the front side of the brush housing chamber 7 and on the lower side of the duct 6 in parallel with the brush housing chamber 7 over substantially the entire length in the width direction (however, FIG. 3). Only shows part of the width). Both end portions 8L and 8R in the width direction of the mixed fluid passage 8 (however, only one end portion in the width direction of the mixed fluid passage 8 is shown in FIG. 3) are U-shaped formed on the downwardly raised ridges 9. It communicates with both ends 6L, 6R in the width direction of the duct 6 through the through holes 9a.

  As shown in FIG. 2, a rectangular opening 22 e that communicates with the duct 6 is provided at the center in the width direction of the front blocking portion 22 a, and the opening 22 e is a blowing means (for example, a sirocco fan). Part) 10 is closed by the discharge port 10 a, and the suction port 10 b of the blower 10 is open toward the front side of the base unit 20. Further, a through hole (not shown) that penetrates the central portion in the width direction of the rear blocking portion 22b and communicates with the brush housing chamber 7 is provided, and the dust suction port 11 is attached by closing the through hole. The central portion in the width direction of the mixed fluid passage 8 communicates with the inlet of the suction port 11, and the outlet of the suction port 11 communicates with the inlet of the dust collecting unit 4 via the suction hose 12 as shown in FIG. I'm allowed.

  As shown in FIGS. 2 and 3, the brush accommodating chamber 7 accommodates a rotating brush 13 that is rotatably supported around a substantially horizontal axis C <b> 1. This rotating brush 13 is for contacting the floor surface 3 shown in FIG. 1 and scraping dust on the floor surface 3 forward. The rotating brush 13 extends in a radially outward direction from the peripheral surface of the rotating brush shaft 13a. It has a floor cleaning brush portion 13b. These floor surface cleaning brush portions 13b have a large lead and are provided in a spiral shape. That is, the floor cleaning brush portion 13b is provided in a spiral shape over the entire length in the axial direction of the rotating brush shaft 13a so that dust can be scraped forward.

  As shown in FIGS. 2, 4 and 5, the rotating brush 13 has outer ends of a pair of couplings 14A and 14B attached to both ends of the rotating brush shaft 13a attached to a pair of left and right brackets 15A and 15B. The bearing metal 16 is rotatably supported by a bearing 17. The pair of left and right brackets 15 </ b> A and 15 </ b> B are attached to the rear blocking portion 22 b in a state where the both ends in the width direction of the rear blocking portion 22 b vertically penetrate the brush housing chamber 7.

  One bracket 15A is provided with an upwardly extending piece 15a, and a rotary brush drive motor 18 is attached to the extended piece 15a with a horizontal axis. A drive pulley 19A attached to the output shaft 18a of the rotary brush drive motor 18 and a driven pulley 19C connected to one coupling 14A via a timing belt 19B and a driving connection pin 23 so as to be simultaneously rotatable. The drive mechanism 19 is configured to rotate the rotating brush 13 around the axis C1 (arrow R).

  As shown in FIGS. 2, 3, 4, and 5, wall-side brushes 24 </ b> L and 24 </ b> R are attached to both ends of the rotating brush 13 in the axial direction so as to be able to rotate around the same horizontal axis C <b> 1 (arrow R). The bumper 5 that surrounds the suction base 2 protrudes outward from both ends in the width direction. As shown in FIGS. 6 and 7, the wall brush 24 includes a wall brush shaft (shaft portion) 24A and a brush portion 24B, and a connecting pin press-fitting hole 24a is provided on a horizontal center line of the wall brush shaft 24A. ing. By pressing the outer end portion of the driving connection pin 23 shown in FIG. 5 into the connection pin press-fitting hole 24a, the drive mechanism 19 rotates the wall brush 24 around the same horizontal axis C1 (arrow R) simultaneously with the rotary brush 13. It is comprised so that it may be made.

  As shown in FIGS. 6 and 7, the brush portion 24B of the wall-side brush 24 is positioned on a straight line C1 passing through the center O of the wall-side brush shaft 24A and is axially extended from the axial outer end surface 24b of the wall-side brush shaft 24A. An array of wall surface cleaning brush portions 24b1 extending outward, and an upper and lower surface extending radially outward from the outer peripheral surface 24c of the wall-side brush shaft 24A continuously to the upper and lower ends of the array of wall surface cleaning brush portions 24b1. A pair of row-like floor surface cleaning brush portions 24b2 are provided. These row-like floor surface cleaning brush portions 24b2 are rotated from the row-like wall surface cleaning brush portion 24b1 side to the opposite side, that is, from the axially outer end surface 24b of the wall-side brush shaft 24 to the opposite side. It is provided on an inclined line C2 that is displaced from the advance position of R to the delay position.

  That is, as shown in FIGS. 6 and 7, the wall-side brush 24 </ b> L on the left side with respect to the traveling direction Y has a base end portion 41 of the wall-side brush shaft 24 </ b> A in a state where the brush portion 24 b 2 is in contact with the floor surface 3. As the outer end portion 42 is closer to the outer end portion 42, it is disposed obliquely so as to be disposed at the advanced position from the delayed position in the rotational direction R, so that it is disposed in a spiral shape along the rotational direction of the left screw.

  As shown in FIGS. 4 and 5, the brush portion 24b2 is arranged in a spiral shape along the rotational direction of the right screw in the right wall brush 24R with respect to the left wall brush 24L. The other structure of the right wall brush 24R is the same as that of the left wall brush 24L, and a detailed description thereof will be omitted.

  Further, as shown in FIG. 3, the both ends 8L and 8R in the width direction of the mixed fluid passage 8 (however, only one end portion in the width direction of the mixed fluid passage 8 is shown in FIG. 3). An L-shaped downward flat surface 25 having a downward bulge amount sufficiently smaller than the downward bulge amount of the bulge portion 9 is formed from the outer side in the width direction of the bulge portion 9 to the front side. When the bumper 5 is attached to the suction base 2, a guide channel having a U-shaped cross section that opens downward from the inner surface of the bumper 5, the lower surface of the L-shaped flat surface 25, and the outer surface of the downwardly raised ridge 9. An (allowable recess) 26 is formed. In the figure, reference numeral 27 denotes a running wheel.

The operation of the above configuration will be described.
The cleaner body 1 and the suction base 2 shown in FIG. 1 travel on the floor surface 3 in the arrow Y direction. At this time, the air suction means (not shown) mounted on the cleaner body 1 and the air blowing means 10 and the drive mechanism 19 provided on the suction base 2 shown in FIG. 2 are activated. By the activation of the air suction means, the front side of the brush housing chamber 7 of the suction base 2 shown in FIGS. 2 and 3 and the air in the brush storage chamber 7 are sucked into the suction port 11 of the suction base 2 shown in FIG. The air is sucked by an air suction means (not shown) through the route 12 → the dust collecting section 4.

  When the drive mechanism 19 is activated, the rotating brush 13 shown in FIGS. 2 and 3 rotates in the direction of arrow R around the brush shaft 13a, and the dust on the floor 3 is scraped forward. The dust scraped up from the floor 3 is mixed with the air flow sucked into the suction port 11 along the mixed fluid passage 8 and sucked into the suction port 11, and collected through the suction hose 12 shown in FIG. Part 4 is reached. Here, dust is collected by a filter (not shown), and only the suction air flow is sucked by an air suction means (not shown) and exhausted outside the apparatus.

  Simultaneously with the rotating brush 13, a pair of left and right wall brushes 24 rotate in the direction of arrow R around the wall brush axis 24 a. These wall-side brushes 24 have a horizontal axis C1 from both ends 2L and 2R in the width direction of the suction base 2 and rotate outside the bumper 5 so that the bumper 5 is in contact with a wall surface (not shown). Alternatively, it is possible to clean the dust on the wall floor 3a and the dust on the lower end of the wall surface in a state avoiding contact.

  As shown in FIGS. 6 and 7, the pair of upper and lower rows of floor cleaning brush portions 24b2 in the brush portions 24B of the wall brushes 24L and 24R extend from the axial outer end surfaces 24b of the wall brush brushes 24L and 24R to the opposite side. 2 is provided on the inclined line C2 that is displaced from the advance position in the rotational direction R of the wall-side brush shaft 24A to the delay position, the dust on the wall-side floor surface 3a shown in FIG. The floor surface cleaning brush portion 24b2 gathers the wall surface 3a shown in FIG. 2 toward the floor surface 3 at an inward inclination angle θ (see FIG. 4) corresponding to the inclination angle θ of the inclination line C2 (see FIG. 4). (See arrow F in FIG. 4). Also, dust at the lower end of the wall surface (not shown) is swept off by the wall-shaped wall cleaning brush portion 24b1 and falls to the wall-side floor surface 3a, mixed into the dust at the wall-side floor surface 3a, and line-shaped floor surface cleaning. The brush portion 24b2 gathers the wall surface from the floor surface 3a toward the floor surface 3 side. In this way, the dust collected on the floor 3 side away from the wall is scraped forward by the rotating brush 13 and then mixed with the air flow sucked into the suction port 11 through the mixed fluid passage 8. Then, it is sucked into the suction port 11 and collected by the dust collecting unit 4. Further, even when the wall brush 24 is away from the wall, it can be gathered toward the rotating brush 13 without sweeping away dust on the floor 3 away from the wall.

  The suction base 2 shown in FIGS. 2 and 3 has a blowing means 10 for applying a pushing force to the suction opening 11 to the mixed fluid of the dust flowing down the mixed fluid passage 8 and the air flow, and the blowing means 10. A duct 6 is provided for guiding the discharged air to the mixed fluid passage 8. That is, as shown by the arrow A in FIG. 3, the discharge air from the air blowing means 10 makes a U-turn through the U-shaped through-holes 9 a formed in the ridges 9 facing downward from both ends in the width direction of the duct 6. Then, it is guided to the mixed fluid passage 8. As a result, the mixed fluid can be surely sucked into the suction port 11 by applying wind pressure to the mixed fluid flowing down the mixed fluid passage 8 as a pushing force to the suction port 11. That is, the force of pushing the discharge wind pressure of the blowing means 10 against the mixed fluid flowing toward the suction port 11 at the width direction both ends 8L, 8R away from the suction port 11 in the mixed fluid passage 8 or in the vicinity thereof. The mixed fluid is reliably sucked into the suction port 11.

  As shown in FIG. 3, on the front side of the wall-side brush 24, a guide channel 26 that allows the dust lifted from the floor surface by the wall-side brush 24 and guides the lifted dust to the mixed fluid passage 8. Since it is provided, the dust on the floor surface 3a scraped up by the wall brush 24 is guided from the guide channel 26 to the mixed fluid passage 8 and mixed with the mixed fluid flowing down the mixed fluid passage 8. , Can flow down toward the suction port 11. For this reason, it is possible to avoid a problem that the dust on the wall-side floor surface 3a collides with another member immediately after being scraped from the floor surface 3a by the wall-side brush 24, and falls again on the wall-side floor surface 3a. The dust can be reliably cleaned.

  In the above-described embodiment, the wall brush 24 is attached to the left and right ends of the rotating brush 13 so as to be rotatable around the horizontal axis C1 (arrow R), and outward from the widthwise ends of the bumper 5 surrounding the inlet base 2. Although it has been described with a projecting structure, a wall-side brush 24 is attached to either one of the left and right ends of the rotating brush 13 so as to be rotatable around the horizontal axis C1 (arrow R), and surrounds the mouthpiece base 2. The bumper 5 may have a structure protruding outward from one end in the width direction.

Further, as shown in FIGS. 6 and 7, the brush portion 24B of the wall brush 24 may not be provided by the wall surface cleaning brush portion 24b1 so that the two floor surface cleaning brush portions 24b2 are continuous. For example, part or all of the wall surface cleaning brush portion 24b1 may be eliminated, and the floor surface cleaning brush portion 24b2 may be provided in two parts.
Moreover, the floor surface cleaning brush part 24b2 may be one, and may provide three or more.
Further, in FIG. 6 and FIG. 7, the brush portion 24B is schematically illustrated in a plate shape, but the brush portion 24B may be provided in a thick bundle shape.

It is a whole perspective view which shows embodiment of a vacuum cleaner. It is a perspective view which decomposes | disassembles and shows embodiment of a suction mouth base to a base part and a cover. It is a perspective view which expands and shows the one end part side of the width direction of the suction mouth base of FIG. 2 seeing from the lower side. It is a perspective view which shows embodiment of a rotating brush, a wall edge brush, and a drive mechanism. It is a perspective view which decomposes | disassembles and shows the rotating brush of FIG. 4, a wall edge brush, and a drive mechanism. It is a perspective view which expands and shows embodiment of a wall brush. It is a perspective view which decomposes | disassembles and shows the brush near a wall of FIG. 6 to a brush axis | shaft and a brush part.

Explanation of symbols

1: Vacuum cleaner body 2: Suction base 3: Floor surface 6: Duct 8: Mixed fluid passage 10: Blowing means (introduction part)
11: Dust suction port 13: Rotating brush 24: Brush at the wall 24A: Brush shaft at the wall (shaft)
24b2: Lined floor surface cleaning brush part (an example of a brush part)
26: Guide channel (allowable recess)
29: Hairless portion 41: Base end portion 42: Outer end portion C1: Horizontal axis C2: Inclined line Arrow R: Direction of rotation of brush Arrow X: Width direction of vacuum cleaner Arrow Y: Travel direction of vacuum cleaner

Claims (3)

A vacuum cleaner body that can run on the floor, and a suction base that sucks up dust and collects it in the airflow of the inhaled air.
The mouthpiece base travels on the floor surface together with the cleaner body, and both ends in the width direction perpendicular to the running direction protrude from both ends in the width direction of the cleaner body. A rotating brush that rotates around a substantially horizontal axis and contacts the floor surface to scrape dust on the floor surface forward; a driving mechanism that rotates the rotating brush around the axis; and the rotating brush In a vacuum cleaner comprising a fluid passage that guides the dust scraped forward from the floor surface to the dust suction port by putting it on an air flow,
The mouthpiece base is provided with a wall-side brush that protrudes outward in the width direction from at least one end in the width direction of the mouthpiece base and rotates around the axis by the drive mechanism ,
The dust suction port and the introduction portion for introducing air are provided at a substantially central portion in the width direction of the suction port base,
A duct is provided for guiding the air introduced from the introduction part to both ends of the suction base and then leading to the fluid passage.
After changing the direction so that the air flowing through the duct makes a U-turn at both ends, the air flows from both ends of the fluid passage toward the dust suction port provided at the substantially central portion in the width direction of the suction base. A vacuum cleaner characterized by being made to flow . A vacuum cleaner body that can run on the floor, and a suction base that sucks up dust and collects it in the airflow of the inhaled air.
The mouthpiece base travels on the floor surface together with the cleaner body, and both ends in the width direction perpendicular to the running direction protrude from both ends in the width direction of the cleaner body. A rotating brush that rotates around a generally horizontal axis and contacts the floor surface to scrape dust on the floor surface forward; a drive mechanism that rotates the rotating brush around the axis; and the rotating brush In a vacuum cleaner comprising a fluid passage that guides the dust scraped forward from the floor surface to the dust suction port by putting it on an air flow,
The mouthpiece base is provided with a wall-side brush that protrudes outward in the width direction from at least one end in the width direction of the mouthpiece base and rotates around the axis by the drive mechanism,
On the front side of the wall side brush before Symbol suction base, as well as permit the floating of dust scooped up from the floor in the the wall brush, permissible recess lifted dust to allow the guided to the fluid passageway An electric vacuum cleaner formed on a lower surface of the suction base. In Claim 1 or 2 , the brush by the wall has a shaft part provided along the axis,
On the outer periphery of the shaft portion, there are one or a plurality of brush portions extending outward in the radial direction of the shaft portion, and a hairless portion adjacent to the brush portion in the circumferential direction of the shaft portion. Provided,
In a state where the brush portion is in contact with the floor surface, the brush portion is arranged at the advance position from the delay position in the rotation direction of the shaft portion as it approaches the outer end portion from the base end portion in the axial direction of the shaft portion. The vacuum cleaner characterized by being provided diagonally.

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