JP2006174954A - Vacuum cleaner and its rotary brush - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vacuum cleaner capable of favorably executing cleaning by enlarging a region where brush bundles come into contact with a floor surface and to provide its rotary brush. <P>SOLUTION: A brush bundle 26 in a first inclined row 29 is erected on the circumferential face of an end-part rotary shaft 23 to incline toward the axial central side of the rotary brush. A brush bundle 26 in a second inclined row 30 is erected on the circumferential face of the end-part rotary shaft 23 to incline toward the axial end part of the rotary brush. The both brush bundles are so disposed that, when the end-part rotary shaft 23 is rotated, the rotation trajectory formed by rotating the respective tips of the brush bundle 26 in the first inclined row and the rotation trajectory formed by rotating the respective tips of the brush bundle 26 in the second inclined row 30 are not superposed on each other. When the end-part rotary shaft 23 is rotated, the region where the brush bundles 26 come into contact with the floor surface opposed to the end-part rotary shaft 23 is enlarged, so that the brush bundles 26 favorably scrape up dusts. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a vacuum cleaner and a rotary brush thereof.

Generally, a vacuum cleaner has a suction head that can suck dust on the floor surface by moving along the floor surface, and in recent years, a vacuum cleaner provided with a rotary brush on the suction head. Is widely used.
A suction port for sucking dust is formed on the lower surface of the suction head, and a part of the rotary brush faces the suction port. A driving force of the motor is transmitted to the rotary brush via a belt, a pulley or the like, and the rotary brush rotates when the motor is driven. In addition, a plurality of brush bundles are planted on the peripheral surface of the rotary brush. When the rotary brush rotates, the brush bundle picks up dust on the floor surface, and the dust is sucked into the suction head from the suction port. It will be. Thereby, the dust on the floor is satisfactorily sucked into the suction head. This type of electric vacuum cleaner is described in Patent Document 1.
JP 59-16773 A

By the way, as a rotary brush used for such a vacuum cleaner, there is one in which a brush bundle formed on a peripheral surface is planted while being inclined to one side in the axial direction of the rotary brush. In such a rotary brush, in particular, a brush bundle that is planted on the peripheral surface in the vicinity of both end portions of the rotary brush is planted while being inclined toward one side in the axial direction.
However, when the brush bundle is planted on the peripheral surface of the rotary brush in this way, the brush bundle is inclined to one side in the axial direction, so when the rotary brush rotates, the brush bundle is A portion where the tip does not contact is generated, and a portion where dust cannot be scraped is generated.

The present invention has been made based on such a background, and an object thereof is to provide an electric vacuum cleaner and a rotary brush thereof that can perform good cleaning by enlarging an area where the brush bundle contacts the floor surface. And
Another object of the present invention is to provide a vacuum cleaner capable of confirming that the cleaning is being performed satisfactorily.

  In order to achieve the above object, the invention according to claim 1 is characterized in that a long rotating shaft (9A) and a large number of brush bundles (26) which are planted on the peripheral surface of the rotating shaft and form a row aligned in the axial direction. A row of brush bundles planted in each region on both sides from the both ends of the rotary shaft to a predetermined length toward the center in the axial direction. The first row (29) and the second row (30) are opposed to each other in the rotation direction of the rotation shaft, and the first row is planted so that the brush bundle is inclined toward the axial center side. The second row is a rotary brush for a vacuum cleaner characterized in that the brush bundle is planted so as to be inclined toward the end in the axial direction.

The alphanumeric characters in parentheses indicate corresponding components in the embodiments described later. The same applies hereinafter.
According to this configuration, the brush bundles in the first row are planted so as to incline toward the axially central side, and the brush bundles in the second row are planted so as to tilt toward the axial end. Therefore, when the rotary brush rotates during cleaning, the first row of brush bundles scrapes the dust on the floor facing the axial center of each area on both sides of the rotary brush. The brush bundle in the second row sweeps up dust on the floor surface facing the axial end of the region. Therefore, the brush bundle contacts the floor surface without unevenness. Therefore, the area where the brush bundle comes into contact with the floor surface can be enlarged, and cleaning can be performed satisfactorily so that no dust is left on the floor surface.

According to a second aspect of the present invention, each of the first row (29) and the second row (30) extends linearly in the axial direction of the rotation shaft (9A), and the rotation The rotary brush (9) for a vacuum cleaner according to claim 1, wherein the rotary brush (9) is disposed 180 degrees apart in the rotation direction of the shaft.
According to this configuration, since the first row and the second row are arranged 180 degrees apart, the brush bundle contacts the floor surface in a well-balanced manner when the rotary brush is rotated. Therefore, the dust can be scraped up in a balanced manner.

According to a third aspect of the present invention, there is provided a rotational trajectory in which the tip of each brush bundle (26) in the first row (29) rotates, and a tip of each brush bundle (26) in the second row (30). The rotary brush (9) for an electric vacuum cleaner according to claim 2, wherein the planting position and the inclination angle of each brush bundle are set so that the rotation trajectory of rotation of the brush bundle does not overlap. is there.
According to this configuration, the rotation trajectory at the tip of each brush bundle in the first row and the rotation trajectory at the tip of each brush bundle in the second row do not overlap. That is, the rotation trajectory at the tip of each brush bundle in the second row overlaps the rotation trajectory at the tip of each brush bundle in the second row, and similarly, the rotation trajectory of the gap at the tip of each brush bundle in the second row. Since the rotation trajectories of the tips of the first bundle of brushes overlap, the tips of the brush bundle contact the floor without being biased. Therefore, the area where the brush bundle comes into contact with the floor surface can be enlarged, and cleaning can be performed satisfactorily so that no dust is left on the floor surface.

  According to a fourth aspect of the present invention, the left and right bearings (22) that rotatably support the rotary shaft are provided at positions that enter a predetermined length from both ends of the rotary shaft (9A) toward the axial center. The first row (29) and the second row (30) of the brush bundle (26) are planted on the peripheral surface of the rotating shaft (23) outside the bearing. It is a rotary brush (9) for vacuum cleaners in any one of Claims 1-3 characterized by the above-mentioned.

According to this configuration, the dust on the floor surface facing the region from the both ends of the rotating shaft to the bearing can be scraped up evenly.
According to a fifth aspect of the present invention, the peripheral surface of the rotating shaft (21) between the left and right bearings (22) is aligned in the axial direction and extends in a spiral shape, and faces the rotating direction of the rotating shaft. The rotary brush (9) for a vacuum cleaner according to claim 4, characterized in that at least two rows (27) of brush bundles are planted.

According to this configuration, the rows of brush bundles are formed on the peripheral surface of the rotation shaft between the bearings so as to extend in a spiral shape, so that dust on the floor surface facing the rotation shaft between the bearings is scraped well. Can be raised.
The invention according to claim 6 is characterized in that both end surfaces of the rotating shaft (23) have a concave portion (31) recessed conically toward the axial center. It is a rotary brush (9) for vacuum cleaners as described in above.

  According to this configuration, since the concave portion is recessed in a conical shape toward the axial center of the rotating shaft, the dust enters the concave portion when the rotary brush is rotated to sweep up the floor surface dust during cleaning. Even then, the trash is scattered outward by centrifugal force. Therefore, dust can be prevented from accumulating in the recess, and the rotary brush can be kept clean. Further, since it is not necessary to put a cap or the like in order to prevent dust from entering the recess, the rotary brush can be kept clean with a simple configuration.

  According to a seventh aspect of the present invention, the outer rotating shaft (23) of the left and right bearings (22) is formed of a separate member from the rotating shaft (21) between the left and right bearings. The outer end surface of the rotating shaft has a concave portion (31) that is recessed conically toward the axial center, and the mounting for connecting the outer rotating shaft to the rotating shaft between the left and right bearings in the concave portion. The rotary brush (9) for a vacuum cleaner according to claim 4, wherein a screw (32) is embedded.

  According to this configuration, since the concave portion is recessed in a conical shape toward the axial center of the rotating shaft, the dust enters the concave portion when the rotary brush is rotated to sweep up the floor surface dust during cleaning. Even then, the trash is scattered outward by centrifugal force. Therefore, dust can be prevented from accumulating in the recess, and the rotary brush can be kept clean. Further, since it is not necessary to put a cap or the like in order to prevent dust from entering the recess, the rotary brush can be kept clean with a simple configuration.

In addition, since the mounting screw is embedded in the recess, the mounting screw is not exposed outside the rotating shaft, and the mounting screw does not cause a cleaning problem.
The invention according to claim 8 is the vacuum cleaner (1) including the vacuum cleaner main body (4) and the suction head (3) attached to the lower end of the vacuum cleaner main body. 20), a longitudinal rotary brush (9) disposed in the head case so as to extend in the left-right direction, and the upper surface of the head case facing both left and right ends of the rotary brush. And a transparent cover (17) that is fitted to the window, covers the window, and is fixed so as to overlap the frame (34) of the window. It is a vacuum cleaner.

According to this configuration, it can be visually recognized that both ends of the rotary brush are scooping up dust on the floor surface from the window through the cover. Moreover, since the cover overlaps the frame of the window, the strength of the left and right ends of the head case can be increased.
In addition, as in the ninth aspect of the invention, the rotary brush (9) is the rotary brush according to any one of the first to seventh aspects. If it is (1), it can visually recognize that the dust is being scraped up by the rotary brush through the window.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a front view showing a configuration of a vacuum cleaner 1 according to an embodiment of the present invention, and FIG. 2 is a left side view of the vacuum cleaner 1. Moreover, FIG. 3 is sectional drawing which looked at the cross section when the vacuum cleaner 1 is cut | disconnected by the vertical surface along the front-back direction from the left side.
1 to 3, the vacuum cleaner 1 includes a suction head 3 that is moved along a floor surface, and one end portion (lower end portion) that is rotatably attached to the suction head 3. The main body 4 is gripped by a handle 5 formed at the other end (upper end) of the main body 4, and the main body 4 is rearward with respect to the vertical direction by a predetermined angle (for example, from 60 ° to 60 °). It is a so-called upright type (vertical type) vacuum cleaner that can be used in a posture inclined by 80 °. A pair of left and right wheels 2A and 2B are rotatably attached to the lower part of the suction head 3 and the lower part of the main body 4, and the electric vacuum cleaner can be obtained by rolling these wheels 2A and 2B along the floor surface. 1 can be moved smoothly. When the vacuum cleaner 1 is not used, the main body 4 can be held in a vertical position with respect to the suction head 3 (the posture shown in FIGS. 1 to 3).

  A suction port 6 is formed on the front side of the bottom surface of the suction head 3. In the main body 4, an electric blower 7 including a motor and a fan that is rotationally driven by the motor is disposed on the rear side of the suction head 3. When cleaning is performed using the electric vacuum cleaner 1, the electric blower 7 is driven so that dust on the floor surface facing the suction port 6 is sucked from the suction port 6 together with the air outside the suction port 6. It is sucked into the head 3.

  A rotary brush 9 that is rotatable about a rotation shaft 9 </ b> A extending in the left-right direction is disposed on the front side inside the suction head 3, and the circumferential surface of the rotary brush 9 faces the suction port 6. The rotational force of the motor of the electric blower 7 is transmitted to the rotary shaft 9 </ b> A of the rotary brush 9. Therefore, when the electric blower 7 is driven, the rotary brush 9 is rotated, and dust such as dust on the floor is scraped up by the rotary brush 9 and the dust is sucked into the suction head 3 from the suction port 6 ( Will be described later).

Covers 17 formed of transparent members are respectively attached to the upper surfaces of both end portions of the suction head 3 so that both end portions of the rotary brush 9 can be visually recognized through the cover 17 ( Will be described later).
A dust collector 10 for detaching dust such as dust contained in the air sucked from the suction head 3 is detachably attached to the main body 4. An inlet 12 is formed in the dust collector 10, and the other end of the hose 13 whose one end is connected to the suction head 3 is connected to the inlet 12 of the dust collector 10. Thereby, the air and dust sucked into the suction head 3 from the suction port 6 are sent to the dust collector 10 side through the hose 13 and taken into the dust collector 10 from the inlet 12. Yes. The dust sucked into the dust collector 10 together with air is captured in the process of passing through the dust collector 10, and only air is discharged from the outlet 14 formed on the front surface of the dust collector 10. The air discharged from the outlet 14 of the dust collector 10 passes through the main body 4 and is discharged out of the machine from an exhaust port 15 formed in the lower front portion of the main body 4.

A hose support part 8 for supporting the middle part of the hose 13 from below is formed on the upper rear surface of the main body 4 so as to prevent the hose 13 from drooping. Further, a hose locking portion 16 is provided at a lower portion of the left side surface (the right side surface in FIG. 1) of the main body 4.
One end of the hose 13 connected to the suction head 3 can be removed from the suction head 3 by releasing the connected state. Thereby, the one end part of the hose 13 can be removed from the suction head 3 and the hose 13 can be moved freely. For example, dust such as a desk top or a window frame can be sucked from one end part of the hose 13. At this time, the user locks the middle portion of the hose 13 to the hose locking portion 16 as shown in FIG.

  Thereby, when removing the hose 13 from the suction head 3 and performing cleaning, it is possible to prevent the hose 13 from being complicatedly expanded. Moreover, since the hose latching | locking part 16 is provided in the lower part of the main body 14, even if the hose 13 is pulled in the state latched by the hose latching | locking part 16, the vacuum cleaner 1 does not fall down. Moreover, since the hose latching | locking part 16 is provided in the left side surface of the main body 14, even if the hose 13 is pulled in the state latched by the hose latching | locking part 16, the vacuum cleaner 1 does not tilt back and forth. Therefore, the vacuum cleaner 1 is not tilted forward, and the rotating rotary brush 9 does not damage the floor surface. The hose locking portion 16 may be provided on the right side surface of the main body 2. Further, if necessary, a member such as a suction nozzle can be attached to one end of the hose 13.

FIG. 5 is a diagram showing in detail the state of the suction head 3 as seen from the bottom side. In FIG. 5, a part is cut away.
The suction head 3 includes a head case 20 that constitutes the appearance of the suction head 3 and a long rotary brush 9 that is rotatably provided in the head case 20.
A suction port 6 is formed on the lower surface of the head case 20.

  The rotary brush 9 is provided with a rotating shaft 9A on which a plurality of brush bundles 26 are planted on the peripheral surface. The rotating shaft 9A has a substantially cylindrical central rotating shaft 21 that extends in the horizontal direction, a bearing 22 that is fitted around the peripheral surfaces of both ends of the central rotating shaft 21, and a center rotating shaft 21. End rotation shafts 23 that are respectively attached to both ends and are located on the same axis as the central rotation shaft 21 are provided.

A pulley 24 is formed near one end of the central rotating shaft 21, and a belt 25 is wound around the pulley 24. The rotational force of the motor of the electric blower 7 is transmitted to the central rotary shaft 21 through the pulley 24 and the belt 25 as described above, and the central rotary shaft 21 and the end rotary shaft 23 attached thereto are integrated. To be rotated.
The brush bundle 26 on the circumferential surface of the central rotating shaft 21 is planted so as to be orthogonal to the axial direction of the central rotating shaft 21. Further, the plurality of brush bundles 26 planted on the peripheral surface of the central rotating shaft 21 are arranged in the axial direction and extend in a spiral shape to form two rows of spiral rows 27. The two spiral rows 27 are arranged so as to be separated by 180 ° in the rotation direction of the central rotation shaft 21.

The bearing 22 is for holding the central rotary shaft 21 rotatably, and is a substantially annular member. The bearing 22 is fixed to a locking portion 28 provided in the head case 20. Thus, the central rotary shaft 21 and the end rotary shaft 23 attached to the central rotary shaft 21 are rotatably held by the head case 20 via the bearing 22.
FIG. 6 is a diagram showing the configuration of the end rotation shaft 23 in detail.

The end rotating shaft 23 is a substantially cylindrical member, and the diameter thereof is substantially the same as the diameter of the central rotating shaft 21. The plurality of brush bundles 26 planted on the peripheral surface of the end rotation shaft 23 constitutes a first inclined row 29 and a second inclined row 30 that are aligned linearly in the axial direction.
The brush bundle 26 of the first inclined row 29 is planted on the peripheral surface of the end rotation shaft 23 so as to be inclined at a predetermined angle (for example, 15 ° to 45 °) with respect to the vertical direction toward the central rotation shaft 21 side. Has been. That is, the brush bundle 26 of the first inclined row 29 is planted so as to be inclined toward the axial center side of the rotary brush 9.

The brush bundle 26 of the second inclined row 30 is inclined at a predetermined angle (for example, 15 ° to 45 °) with respect to the vertical direction toward the end of the end rotating shaft 23 on the peripheral surface of the end rotating shaft 23. It is so planted. That is, the brush bundle 26 of the second inclined row 30 is planted so as to be inclined toward the axial end portion of the rotary brush 9.
Thereby, when the end portion rotating shaft 23 rotates, an area where the brush bundle 26 comes into contact with the floor surface facing the end rotating shaft 23 is increased, and the brush bundle 26 scrapes off dust well.

  The first inclined row 29 and the second inclined row 30 are arranged so as to be separated from each other by 180 ° in the rotation direction of the end portion rotating shaft 23, and further, when the end portion rotating shaft 23 rotates, the first inclined row 29. The planting position and the inclination angle of each brush bundle 26 are set so that the rotation trajectory of rotation of the tip of each brush bundle 26 and the rotation trajectory of rotation of each brush bundle 26 of the second inclined row 30 do not overlap. Has been. That is, the rotation locus of the tip of each brush bundle 26 of the second inclined row 30 overlaps the rotation locus of the gap of the tip of each brush bundle 26 of the first inclined row 29, and similarly, the tip of each brush bundle 26 of the second inclined row 30. The rotation locus of the tip of each brush bundle 26 of the first inclined row 29 overlaps the rotation locus of the gap.

As a result, when the end rotation shaft 23 rotates, the area where the brush bundle 26 comes into contact with the floor surface facing the end rotation shaft 23 becomes larger, and the brush bundle 26 scrapes up dust well. There is no longer any leftovers.
FIG. 7 is a diagram showing a configuration of the rotary brush 9, and the end rotating shaft 23 is shown in a cross-sectional state.

A concave portion 31 that is recessed toward the center in the axial direction is formed on the outer end surface of the end rotation shaft 23, that is, on the end surface opposite to the central rotation shaft 21 side.
The recess 31 is formed in a conical shape that gradually narrows from the outer end surface of the end rotating shaft 23 toward the center in the axial direction. A mounting screw 32 is embedded in the recess 31.
The attachment screw 32 is a screw for attaching the end rotary shaft 23 to the central rotary shaft 21 and extends from the tip of the recess 31 toward the central rotary shaft 21. And it is screwing together with the end part rotating shaft 23 and the center rotating shaft 21, and is located on those axes. As a result, the end rotary shaft 23 is integrally attached to the central rotary shaft 21 with the same axis.

FIG. 8 is a cross-sectional view of the suction head 3 as viewed from the left side when the suction head 3 is cut along a vertical plane along the front-rear direction.
Windows 33 are formed at both ends of the upper surface of the head case 20 of the suction head 3 (note that only one window 33 is shown in FIG. 8). The portion of the head case 20 around the window 33 is a window frame 34, and the cover 17 is attached to the window frame 34.

The cover 17 is made of a transparent member, and its cross-sectional shape is gently rounded. The cover 17 is attached to the head case 20 by having the upper surface of the end portion overlapped with the lower surface of the window frame 34 and the overlapping portion is fixed by screws 35. Thereby, the portion of the window frame 34 has a double structure of the cover 17 and the window frame 34.
When cleaning is performed using the electric vacuum cleaner 1, the rotational force of the electric blower 7 is transmitted to the central rotary shaft 21 via the pulley 24 and the belt 25, and the end rotary shaft 23 rotates together with the central rotary shaft 21. To do. At this time, when the suction head 3 moves along the floor surface, the brush bundle 26 of the central rotary shaft 21 and the end rotary shaft 23 comes into contact with the floor surface, and dust on the floor surface is scraped up to suck the suction head. 3 is sucked into. Further, the user can visually recognize that the brush bundle 26 of the end rotary shaft 23 is scraping dust from the window 33 through the cover 17.

  As described above, in this embodiment, the brush bundle 26 of the first inclined row 29 is planted so as to incline toward the axially central side of the rotary brush 9, and the brush bundle 26 of the second inclined row is Since it is planted so as to incline toward the axial end of the brush 9, when the rotary brush 9 rotates during cleaning, dust on the floor surface facing the axial center side of each area on both sides of the rotary brush 9 The brush bundle 26 in the first inclined row 29 scoops up the dust, and the brush bundle 26 in the second inclined row 30 picks up the dust on the floor surface facing the axial end portions of the respective regions on both sides of the rotary brush 29. Therefore, the brush bundle 26 contacts the floor surface evenly. Therefore, the area where the brush bundle 26 comes into contact with the floor surface can be enlarged, and the cleaning can be performed satisfactorily so that no dust is left on the floor surface.

Further, since the first inclined row 29 and the second inclined row 30 are arranged 180 degrees apart in the rotation direction of the end rotation shaft 23, the brush bundle 26 is formed when the end rotation shaft 23 is rotated. Contact the floor in a well-balanced manner. Therefore, the dust can be scraped up in a balanced manner.
Further, the rotation locus of the tip of each brush bundle 26 of the second inclined row 30 overlaps with the rotation locus of the gap of the tip of each brush bundle 26 of the first inclined row 29, and similarly, the tip of each brush bundle 26 of the second inclined row 30. Since the rotation locus of each brush bundle 26 of the first inclined row 29 overlaps with the rotation locus of the gap, the tip of the brush bundle 26 contacts the floor surface without deviation. Therefore, the region where the brush bundle 26 comes into contact with the floor surface can be enlarged, and the cleaning can be performed satisfactorily so that no dust is left on the floor surface.

Moreover, since the spiral row 27 which is the row | line | column of the brush bundle 26 is formed in the surrounding surface of the central rotating shaft 21, the dust of the floor surface facing the central rotating shaft 21 can be scraped up favorably.
Moreover, since the recessed part 31 currently formed in the edge part rotating shaft 23 is dented conically, when rotating the edge part rotating shaft 23 (rotary brush 9) at the time of cleaning and scraping up the dust of a floor surface, Even if the dust enters the recess 31, the dust is scattered outward by centrifugal force. Therefore, it is possible to prevent dust from accumulating in the recess 31 and to keep the end rotating shaft 23 clean. Further, since it is not necessary to put a cap or the like to prevent the entry of dust into the recess 31, the end rotary shaft 23 can be kept clean with a simple configuration.

Further, since the mounting screw 32 for mounting the end rotary shaft 23 to the central rotary shaft 21 is embedded in the recess 31, the mounting screw 32 is not exposed to the outside of the end rotary shaft 23. The screw 32 does not cause a cleaning problem.
Further, windows 33 are formed at both ends of the upper surface of the head case 20, and the transparent cover 17 is fitted in each of the windows. Therefore, the brush of the end rotary shaft 23 is passed from the window 33 through the cover 17. It can be visually recognized that the bundle 26 is scooping up the dust on the floor surface evenly. Moreover, since the cover 17 and the window frame 34 overlap each other at the upper surface both ends of the head case 20 and have a double structure, the strength of the both ends of the head case 20 can be increased.

The present invention is not limited to the embodiment described above, and various modifications can be made within the scope of the claims.
For example, in the above description, the end rotation shaft 23 has the first inclined row 29 and the second inclined row 30 that are spaced apart by 180 ° in the rotation direction. The angular interval is not limited to 180 °.

Further, the end rotating shaft 23 is configured to have two rows of the first inclined row 29 and the second inclined row 30 as the rows of the brush bundle 26, but a plurality of rows of three or more rows are formed. It may be a configuration. Similarly, a configuration in which three or more spiral rows 27 are formed on the central rotating shaft 21 may be employed.
Moreover, although the rotary brush 9 was set as the structure used for the vacuum cleaner 1 which is an upright type vacuum cleaner, the structure used for vacuum cleaners other than an upright type vacuum cleaner may be sufficient.

It is a front view which shows the structure of the vacuum cleaner concerning one Embodiment of this invention. It is a left view of a vacuum cleaner. It is sectional drawing which looked at the cross section when the vacuum cleaner was cut | disconnected by the vertical surface along the front-back direction from the left side. It is a left view of the vacuum cleaner of the state which latched the middle part of the hose to the hose latching | locking part. It is a figure which shows the state which looked at the suction head from the bottom face side in detail. It is a figure which shows the structure of an edge part rotating shaft in detail. It is a figure which shows the structure of a rotary brush. It is sectional drawing which looked at the cross section when the suction head is cut | disconnected by the vertical surface along the front-back direction from the left side.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vacuum cleaner 3 Suction head 4 Main body 9 Rotary brush 9A Rotating shaft 17 Cover 20 Head case 21 Central rotating shaft 22 Bearing 23 End rotating shaft 26 Brush bundle 27 Spiral row 29 1st inclination row 30 2nd inclination row 31 Recess 32 Mounting screw 33 Window 34 Window frame

Claims (9)

A rotary brush for a vacuum cleaner having a longitudinally rotating shaft and a large number of brush bundles arranged in the circumferential direction of the rotating shaft and arranged in an axial direction,
The rows of brush bundles planted in the respective regions on both sides from the both ends of the rotating shaft toward the axial center are a first row and a second row facing the rotating direction of the rotating shaft, respectively. Have
The first row is planted such that the brush bundle is inclined toward the axial center side,
The rotary brush for a vacuum cleaner, wherein the second row is planted so that the brush bundle is inclined toward the end in the axial direction.   Each of the first row and the second row extends linearly in the axial direction of the rotating shaft, and is spaced apart by 180 ° in the rotating direction of the rotating shaft. The rotary brush for electric vacuum cleaners of Claim 1.   The planting position of each brush bundle so that the rotation trajectory in which the tip of each brush bundle in the first row rotates and the rotation trajectory in which the tip of each brush bundle in the second row rotates do not overlap. The rotary brush for a vacuum cleaner according to claim 2, wherein an inclination angle is set. Left and right bearings that rotatably support the rotary shaft are provided at positions having a predetermined length from both ends of the rotary shaft toward the axial center,
The electric cleaning according to any one of claims 1 to 3, wherein a first row and a second row of the brush bundle are planted on a peripheral surface of the rotating shaft outside the bearing. Rotary brush for machine.   On the peripheral surface of the rotating shaft between the left and right bearings, at least two rows of brush bundles are planted that are arranged in the axial direction and extend in a spiral shape and face the rotating direction of the rotating shaft. The rotary brush for an electric vacuum cleaner according to claim 4.   The rotary brush for a vacuum cleaner according to any one of claims 1 to 5, wherein both end faces of the rotating shaft have concavities that are recessed conically toward the axial center. The rotation shaft outside the left and right bearings is composed of a separate member from the rotation shaft between the left and right bearings,
The outer end surface of the outer rotating shaft has a concavity recessed in a conical shape toward the center in the axial direction, and an attachment for connecting the outer rotating shaft to the rotating shaft between the left and right bearings in the recess. The rotary brush for a vacuum cleaner according to claim 4, wherein a screw is embedded. In a vacuum cleaner including a vacuum cleaner body and a suction head attached to the lower end of the vacuum cleaner body,
The suction head is
A head case,
In the head case, a longitudinal rotary brush arranged to extend in the left-right direction,
A window that is formed on the upper surface of the head case opposite to the left and right ends of the rotary brush, and through which the rotary brush can be viewed;
A vacuum cleaner, comprising: a transparent cover that is fitted to the window, covers the window, and is fixed so as to overlap the frame of the window.   The said rotary brush is a rotary brush in any one of Claims 1-7, The vacuum cleaner of Claim 8 characterized by the above-mentioned.

Images