JP5931533B2 - Electric vacuum cleaner - Google Patents

Description

  Embodiments of the present invention relate to a vacuum cleaner that cleans a surface to be cleaned while traveling autonomously on the surface to be cleaned.

  2. Description of the Related Art Conventionally, there is a vacuum cleaner that cleans a floor surface while autonomously running on the floor surface as a surface to be cleaned while detecting obstacles such as walls by using a sensor or the like to avoid these obstacles. In such a vacuum cleaner, a suction port is formed in a lower portion of a main body case that houses an electric blower and includes a dust collecting portion, and a driving wheel is attached to a side portion of the suction port. Therefore, the suction port cannot be widened on both sides corresponding to these drive wheels, and generally, the suction port has a width dimension of about 2/3 of the width dimension of the main body case. Therefore, in order to clean the wall where the suction port does not reach, etc., as a swivel cleaning part that scrapes dust to the suction port by swirling on the floor surface on both sides of the lower part of the main body case and in front of the drive wheel It is necessary to provide a side brush.

  In such a configuration, for example, when cleaning the floor near the wall, the distance between the main body case and the wall may vary due to sensor variations. For this reason, by forming the brush hair of the side brush as long as possible, for example, dust on the floor surface such as a wall can be efficiently scraped. And when brush hair of a side brush is lengthened in this way, it is desired that the brush hair and the drive wheel do not interfere with each other.

JP-A-6-125861 JP-A-7-322977

  The problem to be solved by the present invention is to provide a vacuum cleaner having improved cleaning efficiency while avoiding interference between the cleaning member of the side brush and the drive wheel.

The vacuum cleaner of the embodiment is a vacuum cleaner that cleans the surface to be cleaned while autonomously running on the surface to be cleaned. This vacuum cleaner has a main body case. Moreover, this vacuum cleaner has a dust collecting opening opened on the bottom surface facing the surface to be cleaned of the main body case. Further, this electric vacuum cleaner has a drive wheel that partially protrudes from the bottom surface of the main body case and that can run on the surface to be cleaned. The vacuum cleaner also has driving means for driving the driving wheels. Furthermore, this vacuum cleaner has a side brush arrange | positioned rotatably at the bottom face. The side brush includes a rotation shaft that extends in a direction intersecting the bottom surface of the main body case, and a cleaning member that has flexibility and protrudes in a direction intersecting the rotation shaft. Then, the vacuum cleaner has a recess which is recessed in the body case, located between the side brush and the drive wheels, by bending a cleaning member that has entered to prevent interference between the cleaning member and a drive wheel .

It is a top view which shows the vacuum cleaner of one Embodiment from the bottom face side. It is a side view of a vacuum cleaner same as the above. It is a block diagram which shows the internal structure of a vacuum cleaner same as the above. It is a top view which shows the vacuum cleaner of one reference technique from the bottom face side. It is a side view of a vacuum cleaner same as the above.

Hereinafter, the configuration of an embodiment will be described with reference to FIGS. 1 to 3.

  1 to 3, reference numeral 11 denotes a vacuum cleaner. In this embodiment, the vacuum cleaner 11 cleans the floor F while autonomously running (self-running) on the floor F as a surface to be cleaned. A so-called self-propelled robot cleaner will be described below as an example.

  The vacuum cleaner 11 includes a hollow main body case 12, an electric fan 13 accommodated in the main body case 12, and a collector provided in the main body case 12 in communication with the suction side of the electric fan 13. Autonomous traveling of the dust part 14, the vacuum cleaner 11, that is, for example, driving wheels 15 as a plurality of driving units for autonomous traveling, motors 16 as driving means for driving these driving wheels 15, and the body case 12 A swivel wheel 17 that is pivotably attached to the lower part, a side brush 18 as a pair of swirl cleaning parts that are pivotally attached to the lower part of the main body case 12 on the floor surface F, and the side brushes 18 are driven. A turning motor 19 as a turning driving means, a sensor 20 as a plurality of detecting means attached to the main body case 12, a control means 22 constituted by a circuit board, etc., and a secondary battery that constitutes a power supply unit Electric And a pond 23.

  Hereinafter, the direction along the traveling direction of the electric vacuum cleaner 11 (main body case 12) is defined as the front-rear direction (arrows A and B shown in FIG. 1), and the left-right direction intersecting (orthogonal) with the front-rear direction ( The description will be made assuming that the width direction is the width direction.

  The main body case 12 is formed in a flat cylindrical shape (disk shape), for example, a synthetic resin or the like, that is, in a circular shape in plan view, and is configured to be easily turned on the floor surface F. In addition, a lower surface 12a, which is a circular bottom surface, is provided at the lower part of the main body case 12, and a central portion in the width direction near the rear portion of the lower surface 12a is long in the width direction, that is, as a horizontally elongated dust collection port. The suction port 24 is formed as an opening. Although not shown, various operation panels and a display unit are arranged on the upper part of the main body case 12. In the following description, the lower surface 12a is described as a flat surface having no irregularities. However, the lower surface 12a includes those having various fine irregularities as long as they are formed along a predetermined plane as a whole.

  The suction port 24 is located closer to the rear side in the front-rear direction of the main body case 12, that is, rearward of the center position in the front-rear direction, and has a width dimension of about 2/3 of the width dimension (diameter dimension) of the main body case 12. Have. Further, the suction port 24 communicates with the dust collection unit 14. Further, a shaft-like rotary brush 25, which is a rotary cleaning body as a main cleaning body, is rotatably supported by the suction port 24. The rotary brush 25 is a cleaning attached to the main body case 12. It is rotationally driven by a rotary motor 26 as body driving means.

  The rotating brush 25 is configured, for example, by attaching a plurality of cleaning body portions protruding in a wall shape spirally in the radial direction on the outer peripheral surface of a long shaft portion. The rotary brush 25 has a lower side protruding from the suction port 24 to the lower side of the lower surface 12a of the main body case 12, and a cleaning body positioned on the lower side with the vacuum cleaner 11 placed on the floor surface F. It is comprised so that the front-end | tip of a part may contact the floor surface F. FIG.

  The dust collecting unit 14 collects dust sucked from the suction port 24 by driving the electric blower 13. For example, the dust collecting unit 14 filters and collects dust with a dust collection bag such as a paper pack or a filter, or centrifugal separation. Any configuration can be used, such as a configuration in which dust is separated and collected by inertial separation such as (cyclonic separation) or linear separation. Further, the dust collecting portion 14 is located at the rear portion of the main body case 12 above the suction port 24 and is detachable from the main body case 12.

  At least the lower side of each drive wheel 15 protrudes downward from the lower surface 12a of the main body case 12, and can rotate by contacting the floor surface F with the vacuum cleaner 11 placed on the floor surface F. ing. The drive wheels 15 are positioned on both sides of the substantially central portion in the front-rear direction of the main body case 12, for example, on both front sides of the suction port 24, and are configured to rotate along the front-rear direction. That is, the rotation axis of each drive wheel 15 is along the left-right width direction of the main body case 12, in other words, on the straight line L passing through the center of the main body case 12 in plan view (the center line in the front-rear direction which is the diameter). ) (Approximately coincident with the straight line L). Therefore, the vacuum cleaner 11 (main body case 12) turns on the floor surface F by rotating these drive wheels 15 and 15 in opposite directions.

  Each motor 16 is disposed, for example, corresponding to each drive wheel 15, and can drive each drive wheel 15 independently. These motors 16 may be directly connected to the respective drive wheels 15, or may be connected to the respective drive wheels 15 via transmission means (not shown) such as gears or belts.

  The swivel wheel 17 is a driven wheel that is located at the front and substantially at the center in the width direction of the main body case 12 and that can swivel along the floor surface F.

  Each side brush 18 is an auxiliary cleaning body that scrapes dust on the floor surface F or the like near the wall where the rotary brush 25 or the like does not reach and guides it to the suction port 24. Each has a brush base 31 that is a shaft, and, for example, three cleaning bodies 32 that project radially in a direction intersecting the brush base 31, that is, in a radial direction of the brush base 31. The side brushes 18 and 18 are arranged on the lower surface 12a of the main body case 12 at the positions where the brush bases 31 and 31 serving as rotation centers are in front of the suction port 24 and the drive wheels 15 and 15 and on both sides behind the swivel wheel 17. It is attached.

  The brush base 31 is formed in an axial shape having at least a vertical component along the vertical direction, that is, a direction intersecting (orthogonal) with the lower surface 12a of the main body case 12. Accordingly, each side brush 18 is configured to turn along the floor surface F (along a surface inclined upward from the front side to the rear side with respect to the floor surface F). Further, the brush base portion 31 is inclined at the upper end side toward the front side, that is, in the opposite direction (separating direction) with respect to the drive wheel 15. Therefore, each side brush 18 is cleaned such that the cleaning body 32 positioned on the front side with respect to the brush base portion 31 is elastically pressed against the floor surface F toward the tip side, and is positioned on the rear side with respect to the brush base portion 31. The body 32 is separated from the floor surface F toward the front end side (closer to the lower surface 12a of the main body case 12).

  Further, for example, three cleaning bodies 32 are set for each side brush 18 (brush base 31), and are spaced apart from each other at substantially equal intervals in the circumferential direction of the brush base 31. For example, four or more cleaning bodies 32 may be set for each side brush 18.

  Each cleaning body 32 includes a plurality of brush hairs 32a as cleaning members on the distal end side. The brush bristles 32a are formed in a thin line shape with a synthetic resin or the like and have flexibility. Further, the larger the protruding amount of the brush bristles 32a from the brush base 31 is, the larger the range of dust can be scraped, so that each cleaning body 32 has at least the brush base 31 and a driving wheel located behind the brush base 31. It is set longer than the distance in plan view with 15. Accordingly, the brush bristles 32a are configured to protrude outward from the outer shell (outer peripheral edge) of the main body case 12 in a state of being positioned on the front outer side of the brush base portion 31. Then, the bristle 32a of each side brush 18 is in a state of being located behind the brush base 31, and each side brush 18 and the driving wheel 15 located behind it (the one closer to each side brush 18) and It is configured to be bent by a concave portion 35 that is an interference preventing portion formed on the lower surface 12a of the main body case 12 between.

  That is, each recess 35 is for bending the bristle 32a of each cleaning body 32 of each side brush 18 to prevent interference between the brush bristle 32a and the drive wheel 15, and has a fan shape in plan view. Each of the inclined surface portion 35a and a receiving surface portion 35b rising upward from the rear end portion of the inclined surface portion 35a is provided, and is recessed with respect to the lower surface 12a.

  The inclined surface portion 35a is formed concentrically with the brush base portion 31 in plan view, and avoids interference with the cleaning body 32 when the side brush 18 turns. Specifically, the inclined surface portion 35a is gradually inclined upward from the front side to the rear side, in other words, from the side brush 18 side to the drive wheel 15 side, and from both side portions in the width direction to the central portion. And gradually tilted upward. That is, the recess 35 is deepest at the center in the width direction, and is formed so as to gradually become shallower on both sides.

  Further, the receiving surface portion 35b is continuous with the circular arc portion of the inclined surface portion 35a, and is formed, for example, in a surface shape (wall shape) substantially parallel to the axial direction of the brush base portion 31. It is designed to bend elastically. Further, the receiving surface portion 35b gradually protrudes upward from both side portions that are continuous with the rear ends of both side portions of the inclined surface portion 35a to the center portion.

  In addition, each rotating motor 19 has a rotating shaft that protrudes downwardly connected to each brush base 31, and each side brush 18 is moved to the center side in the width direction of the body case 12, in other words, on the right side. The brush 18 can be swung to the left, the left side brush 18 to the right, that is, the dust on the floor F can be swung to the suction port 24 side by each side brush 18.

  Further, the sensor 20 is a distance sensor such as an ultrasonic sensor or an infrared sensor, or a contact sensor that becomes a bumper by directly contacting an obstacle, and the front, side, or lower part of the body case 12 And the presence or absence of obstacles (walls) in front of the body case 12, side obstacles (walls), or obstacles (steps) in the lower part, and the distance between them and the body case 12, etc. It can be detected.

  The control means 22 includes a storage means such as a memory and a control unit such as a microcomputer, and is electrically connected to the electric blower 13, the rotary motor 26, each motor 16, each turning motor 19, and the sensor 20, etc. Based on the detection result of the sensor 20, the drive of the electric blower 13, the rotary motor 26, each motor 16, each turning motor 19 and the like can be controlled.

  The secondary battery 23 supplies power to the control means 22, the electric blower 13, the rotation motor 26, each motor 16, each turning motor 19, the sensor 20, and the like. The secondary battery 23 is disposed, for example, at a position behind the turning wheel 17. The secondary battery 23 is electrically connected to a charging terminal (not shown) located on the lower surface 12a of the main body case 12, for example, a predetermined charging stand (not shown) installed at a predetermined position in the room (room). Can be charged by connecting a charging terminal.

Next, the operation of the one embodiment will be described.

  For example, when the predetermined time preset in the control means 22 is reached, the electric vacuum cleaner 11 drives the electric blower 13 and starts cleaning from the charging stand, for example. The cleaning start position can be set at an arbitrary place such as the travel start position of the electric vacuum cleaner 11 or the entrance / exit of the room.

  In the vacuum cleaner 11, the control means 22 rotates the motors 16, 16 and autonomously travels on the floor surface F by the drive wheels 15, 15. At this time, the control means 22 monitors the position and running state of the vacuum cleaner 11 by detecting the distance from the surrounding obstacles through the sensors 20, and responds to the detection by these sensors 20. The vehicle travels on the floor F while avoiding obstacles. The vacuum cleaner 11 sucks the dust on the floor surface F together with the air through the suction port 24 through which the negative pressure generated by driving the electric blower 13 acts via the dust collecting portion 14.

  At the same time, the control means 22 appropriately drives the rotary motor 26 and the swing motors 19 and 19 to rotate the rotary brush 25 along the floor surface F and the side brushes 18 and 18 on the floor surface F. By turning, the dust that has entered the floor surface F is scraped out by the cleaning body of the rotary brush 25 and the brush bristles 32a of the side brushes 18, and the dust in the width direction center side of the main body case 12, that is, the suction port Scrap it to the 24 side and suck it from the inlet 24.

  Here, the brush bristles 32a of the side brushes 18 are in pressure contact with the floor surface F as they are in front of the brush base 31 in a state where the side brushes 18 are swung, and from the brush base 31. While being positioned rearward, the tip side interferes with the receiving surface portion 35b of each recess 35 and is bent along the turning direction of each side brush 18, thereby preventing interference with each drive wheel 15. . That is, when the cleaning body 32 moves from the front to the back of the brush base 31 by the rotation of each side brush 18, the brush hair 32a pressed against the floor surface F is separated from the floor surface F, and the receiving surface portion of each recess 35 A state where the brush bristles 32a are elastically bent in a bent shape toward the rear side in the turning direction of the side brushes 18 due to frictional resistance while being pressed against the surface 35b gradually from one side. It becomes. Therefore, the front end portion of the brush hair 32a is not positioned rearward of the receiving surface portion 35b, and the interference between the brush hair 32a and the drive wheel 15 is prevented. Then, when each side brush 18 is further swung and the bristles 32a of the cleaning body 32 pass the other side of the receiving surface portion 35b of each recess 35, the pressure contact with the receiving surface portion 35b of the brush bristles 32a is gradually released. Then, the bristles 32a are elastically restored and deformed and come into pressure contact with the floor surface F again.

  Then, the dust sucked together with the air from the suction port 24 is separated and collected by the dust collecting unit 14, and the air from which the dust is separated is sucked into the electric blower 13 and cooled after the electric blower 13 is cooled. The exhaust air is exhausted from the main body case 12 to the outside.

  When it is determined that the cleaning of the entire floor F to be cleaned has been completed, the control means 22 makes the electric vacuum cleaner 11 autonomously travel to the position of the charging stand, and stops the electric blower 13 and the motors 19, 26, etc. In addition, the charging terminals are connected (physically and electrically) to the charging stand to stop the motors 16 and 16, and the operation is terminated to charge the secondary battery 23.

As described above, according to the above embodiment, as the interference prevention part by bending the brush bristles 32a of the side brush 18 to prevent interference between the drive wheels 15 and the brush bristles 32a, the lower surface 12a of the main body case 12 By using the recessed portions 35 that are provided in a recessed manner, these recessed portions 35 do not interfere with or be caught by the unevenness of the floor surface F and the like so that the vacuum cleaner 11 (main body case 12) does not stop (stack). The autonomous running of the cleaner 11 (main body case 12) can be controlled better.

  Further, the brush base 31 of each side brush 18 is inclined so that the front end side of the brush bristles 32a of the cleaning body 32 located on the recess 35 side (rear side) enters each recess 35. That is, the brush bristles 32a of the cleaning body 32 located on the front side of the electric vacuum cleaner 11 (main body case 12) are more reliably pressed against the floor surface F, and the dust on the floor surface F is reliably scraped without being left behind. be able to.

  Furthermore, each concave portion 35 includes a receiving surface portion 35b that is in pressure contact with the distal end side of the bristle 32a located on the concave portion 35 side, so that the brush bristle 32a that has entered the concave portion 35 can be reliably bent.

Next, one reference technique will be described with reference to FIGS. In addition, about the structure and effect | action similar to the said one Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

This single reference technology, instead of the recess 35 of the above embodiment, but with the guide portion 38 of the interference prevention portion.

  The guide portion 38 is a convex guard that bends the bristles 32a of the cleaning bodies 32 of the side brushes 18 to prevent the brush bristles 32a and the drive wheels 15 from interfering with each other. Projecting in a wall shape toward the lower side (floor surface F), a front surface portion 38a that is a receiving surface portion as a restricting surface portion positioned in front of the drive wheel 15, and an inner side in front of the drive wheel 15 (center side of the body case 12) And a side surface portion 38b which is a receiving surface portion serving as a restricting surface portion. Therefore, the guide portion 38 is bent in a hem shape in plan view.

  For example, the front surface portion 38a is formed linearly along the width direction.

  Further, the side surface portion 38b is formed to extend, for example, in a straight line so as to be gradually inclined from the front side to the rear side toward the center side of the main body case 12.

  Each side brush 18 is arranged so that the brush base 31 intersects (orthogonal) with the lower surface 12a of the main body case 12, that is, has an axial direction along the vertical direction (vertical direction). Therefore, each side brush 18 is configured to turn along the floor surface F (along a plane parallel to the floor surface F).

  During cleaning, the vacuum cleaner 11 is controlled such that the control means 22 rotates the motors 16 and 16 and autonomously travels on the floor surface F by the drive wheels 15 and 15 while the control means 22 rotates and rotates the motor 26. By rotating the motors 19 and 19 as appropriate, the rotating brush 25 is rotated along the floor surface F and the side brushes 18 and 18 are rotated on the floor surface F to rotate the dust that has entered the floor surface F. The dust is scraped by the cleaning body portion of the brush 25 and the brush bristles 32a of the side brushes 18 and sucked from the suction port 24.

  Here, the brush bristles 32a of the side brushes 18 are in pressure contact with the floor surface F as they are in front of the brush base 31 in a state where the side brushes 18 are swung, and from the brush base 31. While being positioned rearward, the tip side interferes with each guide portion 38 and is pressed along the turning direction of each side brush 18 so as to be pressed against the floor surface F. Interference is prevented. That is, when the cleaning body 32 moves from the front side to the rear side of the brush base portion 31 by the rotation of each side brush 18, the tip side of the brush bristles 32a abuts on the side surface portion 38b of each guide portion 38 and elastically bends in a bent shape. When the side brushes 18 are further swung, the bristle 32a is guided by the side surface portion 38b while maintaining the bent state, and then comes into contact with the front surface portion 38a. Therefore, the front end portion of the brush hair 32a is not positioned rearward of the guide portion 38, and interference between the brush hair 32a and the drive wheel 15 is prevented. Then, when each side brush 18 further turns and the brush hair 32a of the cleaning body 32 passes the front surface portion 38a of each guide portion 38, the pressure contact with the guide portion 38 of the brush hair 32a is gradually released, and the brush The bristles 32a elastically return and deform.

Thus, according to one reference technique , the guide portion 38 that protrudes from the lower surface 12a of the main body case 12 as an interference prevention portion that bends the brush hair 32a and prevents interference between the brush hair 32a and the drive wheel 15. Can be used to prevent interference between the brush bristles 32a and the drive wheels 15 while maintaining the state where the bristles 32a of the side brushes 18 are in contact with the floor surface F. Can.

The above according to one embodiment and one reference technique described, interference between the side brush 18 and the drive wheels 15, to deflect the brush bristles 32a of the side brush 18 and the brush bristles 32a and the drive wheels 15 Even when the bristle 32a (cleaning body 32) of the side brush 18 is set to be relatively long by providing the concave portion 35 or the guide portion 38 which is an interference preventing portion for preventing the brush bristle 32a and the drive wheel 15, Can be reliably prevented. For this reason, for example, when cleaning the floor surface F near the obstacle such as a wall, even if the distance between the main body case 12 and the obstacle varies due to variations in the sensor 20, the brush hair 32a of the side brush 18 is lengthened. By setting, dust can be efficiently scraped.

  Further, a concave portion 35 serving as an interference preventing portion is provided between the drive wheel 15 positioned on a straight line L passing through the center of the circular main body case 12 in plan view and the side brush 18 positioned in front of the drive wheel 15. Alternatively, by providing the guide portion 38, the dust on the floor surface F on the front side in the traveling direction of the vacuum cleaner 11 (main body case 12) is reliably scraped by the brush bristles 32a of the side brush 18, and the side brush 18 is swung. Thus, the bristle 32a located on the rear side can be bent by the concave portion 35 or the guide portion 38 to reliably prevent interference with the drive wheel 15.

In the above embodiment and one reference technique, the control unit 22, in addition to, the side brush via the swing motor 19 and 19 function to control the rotation of the driving wheels 15, 15 via the motor 16, 16 The function of controlling the rotation of 18, 18 is configured integrally with the function of controlling the drive of the electric blower 13 and the function of controlling the rotational drive of the rotary brush 25 via the rotary motor 26. You may comprise separately.

  In addition, each side brush 18 is not limited to one using brush bristles 32a as a cleaning member, but may be an arbitrary cleaning member having flexibility such as a blade body extending in a strip shape or a combination of these brush bristles and blade bodies. It is possible to adopt a configuration to be used.

  Further, the cleaning body 32 of each side brush 18 may be entirely made of brush hairs 32a. That is, the cleaning body 32 can be arbitrarily set on the base end side as long as it has brush hairs 32a on at least the front end side.

  If there is at least one side brush 18 on at least one side in front of the suction port 24 of the main body case 12, the same effects as those of the above embodiment can be obtained.

  Alternatively, the electric blower 13 may not be provided, and the rotating brush 25 may be used to scrape the dust on the floor surface F and collect the dust onto the dust collecting unit 14.

  Further, the vacuum cleaner 11 is configured to monitor the position and running state of the vacuum cleaner 11 by detecting the distance to surrounding obstacles through the sensor 20, and to autonomously travel while avoiding the obstacle. In addition, for example, a configuration may be adopted in which a sensor or the like is not provided and the vehicle travels autonomously along a preset cleaning course.

Then, has been described an embodiment of the present invention, the embodiment of this is presented by way of example only, and are not intended to limit the scope of the invention. Novel embodiments of this is capable of being embodied in other various forms, without departing from the spirit of the invention, various omissions, substitutions, and changes can be made. Embodiments and modifications of this are included in the scope and spirit of the invention, and are included in the invention and the scope of their equivalents are described in the claims.

11 Vacuum cleaner
12 Body case
12a Bottom surface
15 Drive wheels
16 Motor as drive means
18 Side brush
24 Suction port as dust collector
31 Brush base, which is the rotation axis
32a Brush hair as a cleaning member
35 recess

Claims (3)

A vacuum cleaner that cleans the surface to be cleaned while traveling autonomously on the surface to be cleaned,
A body case,
A dust collection opening opened on the bottom surface of the main body case facing the surface to be cleaned;
A drive wheel that partially protrudes from the bottom surface of the main body case and that can travel on the surface to be cleaned;
Drive means for driving the drive wheels;
A rotating shaft extending in a direction intersecting the bottom surface of the main body case, and a cleaning member that has flexibility and protrudes in a direction intersecting the rotating shaft, is rotatably disposed on the bottom surface. Side brush,
A concave portion provided in the main body case, located between the side brush and the driving wheel, and having a concave portion for bending the cleaning member that has entered to prevent interference between the cleaning member and the driving wheel. A vacuum cleaner characterized by The rotation axis of the support Idoburashi an electric vacuum cleaner according to claim 1, wherein the distal end side of the cleaning member located in a concave portion side is characterized in that it is inclined in a direction to enter the recess. The body case is circular in plan view,
The drive wheel is located on a straight line whose rotation axis passes through the center of the main body case in plan view,
The electric vacuum cleaner according to claim 1 or 2 , wherein the side brush is positioned in front of the drive wheel.

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