DE202019102533U1 - Electric cleaning device for motor assisted cleaning of surfaces - Google Patents

Abstract

Electric cleaning device (1) for motor-assisted cleaning of surfaces, comprising
- A housing (2) with a motor receiving space, in which an electric motor is arranged, with an electrically connected to the electric battery holder for receiving at least one battery (3) for the electrical supply of the electric motor and a partially to an environment of the cleaning device (1) open brush receiving space (16) in which at least one mechanically coupled to the electric motor and driven by this axis (17) for receiving at least one roller brush (10, 11) for cleaning the surfaces,
- An elongated stem (6) which is connected to the housing (2) and extending therefrom, wherein a longitudinal extension direction of the stem (6) extends at least substantially perpendicular to the axis (17), and
- A water connection (5) for connecting a water hose, extending from the water connection (5) into the brush receiving space (16) has a passage through which water can flow.

Description

The invention relates to an electric cleaning device for motor-assisted cleaning of surfaces.

Cleaning works in a wide variety of applications, both in the industrial and business environment as well as in the private sector. Because of the relatively large amount of time invested in cleaning tasks and the regularity with which cleaning tasks have to be repeated in many areas, any kind of relief and gain in efficiency here are particularly desirable and valuable. However, hitherto cleaning devices or cleaning tools are often used that are not very flexible or intended for a single application or can not be handled by different people with the same efficiency and ergonomics.

Object of the present invention is to provide an improved cleaning device that allows a particularly good and at the same time comfortable cleaning of surfaces. This object is achieved by the subject matters of the independent claims. Advantageous embodiments and further developments of the present invention are specified in the dependent claims, in the description and in the figures.

An inventive electrical cleaning device, also referred to as a cleaning tool, is used, is thus set up and designed for motor assisted cleaning of surfaces, in particular of at least substantially flat bottom surfaces along which the cleaning device can be guided by a respective user. The cleaning device according to the invention proves a housing with a motor accommodating space, also referred to as in the engine compartment, in which an electric motor is arranged, with a battery connected electrically to the electric motor battery receptacle for receiving a battery for the electrical supply of the electric motor and with a region to an environment of the cleaning device out open brush storage room. In the brush receiving space in this case runs at least one mechanically coupled to the electric motor and rotatably driven by this axis or shaft for receiving or holding at least one roller brush for cleaning the surfaces.

The roller brush can be part of the cleaning device according to the invention. Likewise, however, the roller brush can be an additional, for example exchangeable or separately available component.

The cleaning device according to the invention further comprises an elongate stem which is connected to the housing and extends away therefrom, wherein a longitudinal extension direction of the stem extends at least substantially perpendicular to the axis or shaft which extends in the brush receiving space. Furthermore, the cleaning device according to the invention has a water connection for connecting a water hose or a water pipe, wherein extending from the water connection to the brush receiving space, a passage or channel through which water can flow. The water connection is arranged such that it is accessible from outside the cleaning device. Accordingly, as the water hose preferably, for example, a conventional garden hose or the like can be readily connected to the water connection of the cleaning device, for example, without the need for tools or other operations or measures would be required. In this case, the passage is a connection from the water connection into the brush receiving space, through which water or other cleaning liquids arriving in the water hose can flow, so that the roller brush and / or the respective surfaces to be cleaned, optionally arranged on the axle or shaft, pass over the cleaning device is guided, moistened with the water or the cleaning liquid or is wetted or can be. Experience has shown that this can bring about an improved cleaning result. In addition, the water can be flushed by means of the roller brush dirt directly away from their place of origin and / or bind possibly whirled up dust.

Water provided by the water hose at the water connection can flow through the passage through a water pressure in the water hose. Likewise, however, the electric cleaning device may have an integrated pump for conveying water or a cleaning liquid from the water connection through the passage. In any case, the water connection may preferably be formed as part of a commercially available plug connection. Such connectors or connectors are known, for example, under the brand name and by the manufacturer Gardena. Such or similar connectors can advantageously allow a particularly simple and flexible use of the water connection, as can be connected by the standardized, uniform design diverse water hoses readily to the water connection of the cleaning device according to the invention.

The handle of the cleaning device is used, is thus provided and designed as a handle or handle for a particular user of the cleaning device. Accordingly, the stem may preferably have one or more gripping regions that are ergonomically designed to provide a secure and comfortable grip by a human hand. Likewise, the stem or a portion of the stem, in particular an upper, so facing away from the housing, end portion of the stem relative to the longitudinal extension direction of the stem to be bent or angled. This can advantageously enable a particularly ergonomic and comfortable guiding of the cleaning device according to the invention by the respective user. The longitudinal extension direction of the stem is to be understood as that direction or spatial dimension in which the stem or an imaginary cuboid of minimum size enclosing or enveloping the stem has its greatest longitudinal extent. The stem may be inserted, for example, in a corresponding handle receptacle of the housing, bolted to the housing or welded or integrally formed out of the housing. The handle, like the housing, may be wholly or partly formed of a metal or metallic material and / or a plastic material. Thus, depending on the field of application, the cleaning device can be optimized for robustness, that is, for example, improved shock or breaking strength, or for the lowest possible weight.

The aforementioned roller brush can be understood in particular in the conventional or customary sense. The roller brush can therefore have an at least substantially cylindrical base body, from the lateral surface of which a plurality of bristles extend radially outwards. Along a longitudinal central axis of the cylinder, the roller brush can have a, for example, likewise cylindrical cavity which is open in the direction of one or both of the front or side surfaces of the cylinder, ie in the axial direction. In this cavity can then intervene the axis of the cleaning device. By at least one corresponding shaping or latching or a tongue and groove arrangement and / or the like, a mechanical contact between the roller brush and the axle can be given or produced. This can ensure that the roller brush arranged on the axis co-rotates with the axis and thus is likewise rotatable or drivable by the electric motor. For this purpose, the electric motor can be coupled directly or indirectly, for example via a gear and / or belt arrangement and / or a transmission, preferably gearless, transmission mechanically to the axle or shaft. Particularly preferably, this mechanical coupling can be provided longitudinally in the middle of the axis, or two sections or partial sections of the axis can extend from the coupling in opposite directions. In both cases, the mechanical coupling relative to the longitudinal direction, that is, a rotational or rotational axis of the axle or shaft may be arranged centrally in the brush receiving space.

The brush receiving space is to be understood as a space partially enclosed by the cleaning device in which the roller brush is intended to be arranged for a cleaning operation of the cleaning device. The brush receiving space can be defined, for example, by a curved or an at least substantially arcuate course following wall or cover of the cleaning device, so be partially limited. This wall or cover may be formed as part of the housing integral with this or formed or connected as a separate component directly or indirectly to the housing, for example, held on this. When the cleaning device is arranged as intended on a flat surface to be cleaned, the brush receiving space may be open towards this surface in order to allow contact of the roller brush with the surface. At the same time, the brush receiving space partially limiting wall or cover extending on a then the surface to be cleaned opposite side of the roller brush or the axis or shaft and preferably arched to at least two sides or hood-shaped around the brush receiving space and thus the roller brush or the axis or wave extending in the direction of the surface to be cleaned.

By such a design of the cleaning device, this can be used in a particularly safe and comfortable, since, for example, fluidized dirt collected by the wall or cover, so it can be kept in the brush receiving space. In addition, it can be advantageously prevented that relatively large foreign bodies enter the brush receiving space and can damage the roller brush or its mechanical coupling or suspension.

Particularly preferably, a rubber lip can be arranged on at least one of the respective surfaces to be cleaned and at least substantially parallel to the edge of the wall or cover bordering the brush receiving space. This can be particularly safe, reliable and damage-free, the brush receiving space sealed at least along the edge relative to the environment, since the rubber lip due to their flexibility and their softer compared to the wall or cover or to the housing material particularly simple and reliable during operation of the cleaning device, so while guiding the cleaning device along the surface, remain in mechanical contact with the surface or can be held.

The at least one battery can be a rechargeable energy store in the sense of the present invention, which can deliver electrical energy for operating the electric motor. The battery may include one or more battery or battery cells or corresponding cell modules. Preferably, the battery can have a nominal operating or output voltage of 12 V, 18 V, 24 V, 36 V or 48 V, ie spend or provide in the fully charged state. Likewise, however, other voltages may be possible, for example, depending on a battery technology used and / or depending on a configuration of the electric motor and / or an intended use or application of the cleaning device. Lower voltages can be advantageously realized technically easier, while higher voltages can advantageously allow a larger power output of the battery. The battery, for example, based on a lithium-ion technology. Likewise, however, other battery technologies or another cell chemistry can be used in the course of further technical development.

Particularly preferably, the battery holder may have a circumferential seal, which rests in the inserted into the battery holder battery on this. This can advantageously prevents the penetration of dirt or water in the battery holder and thus the cleaning device can be operated particularly safe and reliable. In addition, this makes the use of the cleaning device particularly comfortable because after its use in a polluted environment, an interior of the battery holder does not need to be cleaned.

The motor accommodating space serves to receive or arrange the electric motor therein. In order to protect it from water and / or dirt, the motor accommodating space may preferably be sealed off from the brush accommodating space. Additionally or alternatively, the electric motor itself may have a sealed or sealed motor housing, at least against coarse dirt and / or spray water. In particular, in the first case, further electrical or electronic components of the cleaning device can be arranged in the motor accommodating space, for example beside or on the electric motor or in a separate compartment or area of the motor accommodating space. This may be, for example, a circuit board or circuit, which are designed to control electrical or electronic functions of the cleaning device. By sealing the engine compartment, these components are then advantageously also protected at least against coarse dirt and spray, or that could be whirled up during operation of the cleaning device from the brush receiving space.

Overall, the features and design details of the electric cleaning device according to the invention described here and below work together to allow a particularly good, ie effective, cleaning of surfaces and at the same time an improved comfort compared to conventional cleaning appliances or brushes for a particular user or user of the cleaning device to offer. For example, the electric motor reduces a force to be applied by the user to clean the respective surface by rotating or rotating the brush by means of a motor. Since the breasts can rotate faster than would be the case with a simple hand-guided rolling of the brush over the surface, an improved cleaning effect can also be achieved. This cleaning effect can also be assisted by water which can be introduced via the water connection and the passage. The fact that the cleaning device is battery operated, it can be flexibly used in different places, regardless of whether in each case a power connection for the cleaning device is available nearby. In addition, the cleaning device can be used in this way very comfortable, since a disability is eliminated by an otherwise necessary external power cable. Characterized in that the brush receiving space is at least partially sealed from the environment of the cleaning device, as described in whirling up of dirt and / or water can be prevented or reduced by the roller brush. As a result, for example, a previous sweeping or suction of a surface to be cleaned can be dispensed with and advantageously no protective clothing must be worn when using the cleaning device.

Although the cleaning device according to the invention may be provided primarily for cleaning flat bottom surfaces, it may also be used for cleaning, for example, curved surfaces or wall and / or side surfaces or even ceiling surfaces.

In a further advantageous embodiment of the present invention, the battery receiving at least two slots, so slots or compartments or ports, for at least two batteries for serial and / or parallel electrical Supply of the electric motor. In other words, a plurality of batteries can thus simultaneously be inserted into the battery holder and then used to operate the electric motor or the cleaning device. The multiple batteries can be connected electrically in series or electrically in parallel or it can be provided a mixed electrical interconnection of the batteries. Particularly preferred can be switched by means of a corresponding control element between these different interconnections of the batteries or the slots for the batteries. In this way, depending on the requirements advantageously a longer operation of the cleaning device, a higher power output of the batteries and thus a higher engine and ultimately cleaning performance of the cleaning device or a compromise thereof can be achieved. For example, so two batteries can be used with a respective operating voltage of 18 V in the battery holder to supply the electric motor with 18 V voltage. Alternatively, the electric motor can then be supplied by the two batteries with 36 V voltage. Particularly preferably, it can be provided that the cleaning device is also operable if not all slots are occupied, so if, for example, only one battery is inserted into the battery holder. This can be realized via a corresponding interconnection or a corresponding connection of the individual slots to the electric motor.

In a further advantageous embodiment of the present invention, in a movement or guide direction of the cleaning device provided for cleaning the surfaces, the brush receiving space is arranged on a front side of the cleaning device and the water connection is arranged opposite on a rear side of the cleaning device. The intended direction of movement in this case runs at least substantially perpendicular to the axis and the stem. If a user of the cleaning device thus leads this forward in front of him, the back of the cleaning device is then facing the user, while the front of the cleaning device is arranged facing forward in the direction of movement, thus facing away from the user in this sense. This arrangement of the brush receiving space and the water connection a particularly comfortable operation of the cleaning device is made possible because effectively prevents a connected to the water hose water hose obstructs the forward movement of the cleaning device. In addition, an improved cleaning result can be achieved, for example, with respect to a lateral arrangement of the water connection, since a water hose possibly connected to the rear-side water connection can then extend along a respectively already cleaned surface area, since the water hose is effectively drawn behind the cleaning appliance.

In a further advantageous embodiment of the present invention, the axle has two sections which extend away from a central coupling region, via which the mechanical coupling of the axle to the electric motor is provided, in opposite directions. In this case, a respective roller brush can be plugged onto each of the sections of their ends facing away from the coupling region. In other words, the roller brush mentioned at the beginning can therefore be designed in two parts or two roller brushes can be provided. The two subsections of the axis can each be subregions of a continuous axis lying on both sides of the coupling region. Likewise, the two subsections of the axle may be separate components which are, for example, plugged or otherwise mechanically connected to the coupling region from both sides of the coupling region. The two subsections of the axis can in each case have a common longitudinal central axis and thus a common rotational or rotational axis, that is, they extend axially aligned with one another. By this, also already described above important arrangement of the coupling region can advantageously be achieved improved stability as well as an improved directional stability of the cleaning device. In addition, the possibility so advantageously to use different roller brushes and / or replace the two roller brushes or the two parts of the roller brush independently. The former can be particularly advantageous, for example, when the cleaning device is to be guided along a line or border and on both sides of this line or border different conditions are given, for example, different surface types are present. By different roller brushes on both sides of the coupling region then both different surface areas can be optimally cleaned in one operation. The independent interchangeability of the roller brush allows a resource-saving and needs-based replacement, for example, uneven wear on both sides of the roller brush parts.

In an advantageous embodiment of the present invention, the cleaning device comprises the two roller brushes. The two roller brushes each have oblique bristles which are inclined to a cylindrical surface of the respective roller brush, so that when both roller brushes are attached to the axis or the subsections of the axis, the oblique bristles in the direction of each other Roller brush are tilted and cover the coupling region at least partially. In other words, the oblique bristles are thus not perpendicular to the respective lateral surface, but at an angle of more than 0 ° but less than 90 ° to the lateral surface or to a surface normal of the lateral surface. The oblique bristles can protrude from the lateral surface itself or from another surface area of the roller brushes. For example, this surface area may in turn be arranged obliquely or tilted relative to the lateral surface, in which case the oblique bristles may protrude perpendicularly from this surface area. The oblique bristles can be provided in particular in addition to respective bristles of the roller brushes projecting at least substantially perpendicularly out of the lateral surface. Due to the oblique bristles additionally provided here, it is advantageously possible to achieve a uniform cleaning result over an entire length of the axis. In other words, when guiding the cleaning device over a surface to be cleaned through the oblique bristles covering the coupling region, there is thus advantageously no non-cleaned or non-brushed region or strip between the two roller brushes or their webs. The oblique bristles can advantageously be formed analogous to corresponding obliquely standing bristles of a side brush described below. For example, here the oblique bristles of the roller brushes may be formed so long and arranged at an angle that they end with perpendicular to the respective lateral surface bristles on a common imaginary cylindrical envelope surface surrounding the respective roller brush.

In a further advantageous embodiment of the present invention, the at least one roller brush tool-free on the axis fastened and tool-free detachable from the axis. In other words, the roller brush can also be exchanged, removed and mounted by a user in the field use of the cleaning device. This can be achieved for example via a plug-in and / or locking mechanism, which will be described in more detail below. The tool-free interchangeability of the roller brush allows a particularly comfortable flexible and reliable use of the cleaning device. In addition, by exchanging the roller brush for another type of roller brush even in a field use of the cleaning device this can be adapted to different surfaces to be cleaned very easily and quickly as needed.

In an advantageous development of the present invention, a manually releasable locking mechanism for holding or fixing the roller brush on the axle is integrated in the axle. In other words, at least a part of the locking mechanism, by which the roller brush is held on the axis during operation of the cleaning device, is arranged within the axle itself. For this purpose, the axis may be formed as a hollow cylinder with an internal receiving space for the locking mechanism. The arrangement of the locking mechanism at least partially within the axis advantageously allows a particularly space- or space-saving arrangement and thus a particularly weight-saving, so lightweight design of the cleaning device, which can be performed very comfortable. In addition, the arrangement provided here of the locking mechanism allows a particularly intuitive and safe use of the cleaning device, as well as technically inexperienced users will intuitively plug the roller brush on the axle and then do not need to search the locking mechanism elsewhere. In addition, at least a part of the locking mechanism can be covered by the roller brush plugged onto the axis by the embodiment provided here, whereby the locking mechanism can be particularly reliably protected against damage during operation or use of the cleaning device.

In an advantageous embodiment of the present invention, the locking mechanism comprises at least one pin and a spring-loaded button mechanically coupled thereto. This key is arranged on a front or head side of the axis surrounded by an axis forming, frontally open shell element. This jacket element can form the already mentioned hollow cylinder. The front or head side can then be understood as different from the lateral surface of the cylinder side surface of the cylinder, thus extending perpendicular to one by means of the longitudinal axis of the cylinder. It is further provided here that the button along this longitudinal central axis of the axis, ie the corresponding hollow cylinder, can be pressed. The at least one pin protrudes to hold the roller brush at least substantially perpendicular to the longitudinal central axis radially outwardly beyond the shell element, so the corresponding outer surface, and is retracted to release the roller brush by pressing the button radially inwardly into the shell element. To hold the roller brush, the pin can engage in a corresponding recess or receiving the roller brush. Likewise, the pin can be arranged axially outside the roller brush and thereby prevent a withdrawal or slipping of the roller brush in the axial direction of the axis.

Particularly preferably, several pins can be provided, which are in different Directions, for example, evenly distributed over a circumference of the axis, arranged and can move synchronously or simultaneously with each other by pressing, ie pressing the button. A provided for spring-loaded the button spring element of the locking mechanism can be designed and arranged so that it pushes the button by a corresponding spring force during or after their impressions, ie in a fully or partially depressed state of the button, axially outwards, so that the button for a particular user is particularly easy to reach and operate.

In an advantageous embodiment of the present invention therefore has locking mechanism so at least one spring element, by the spring force the button axially outward and the at least one pin are pressed radially outward. Thus, the spring element causes when plugged onto the axis roller brush so that the pin is held in a holding or locking position in which it prevents the withdrawal or slipping of the roller brush from the axis. The spring element may be a single element or an assembly of several individual parts, for example, at least a plurality of individual springs.

In an advantageous embodiment of the present invention, the at least one pin and / or the roller brush on a relative to a direction of movement of the pin when pressing the button beveled contact area. At this contact area come when plugging the roller brush on the axis of the pins and the roller brush with each other in touch. Characterized in that the contact area or the contact areas are chamfered, the pin is then pressed against the spring force radially inward during the attachment of the roller brush. Once the pin is then no longer covered by the roller brush, it is again pressed by the spring force radially outward to hold the roller brush or lock. The latter is done automatically by the spring force or by a corresponding spring load of the pin. As a result, the roller brush can be held or locked particularly reliably, since a respective user does not have to bring the pin manually into the corresponding holding or locking position. The embodiment proposed here also makes it possible to improve the ease of use or cleaning of the cleaning device, since the button mentioned above does not have to be pressed onto the axis or on the axis because the button has to be pressed by the user to attach the roller brush the axis in the axial direction applied force is deflected by the tapered contact portion partially in the radial direction for pressing the pin. The appropriately designed roller brush may be part of the present invention claimed cleaning device.

In a further advantageous embodiment of the present invention, the cleaning device comprises the at least one roller brush with radially outwardly projecting bristles and additionally at least one side brush with bristles, which are in the intended installation position of the brush, so the roller brush and the side brush, obliquely to the bristles of the roller brush. In other words, the cleaning device then comprises at least two different types of brushes, the bristles of which protrude in different directions in the intended installation position, and thus during operation of the cleaning device with the two brushes. As a result, a cleaning effect in different directions, for example on or on surfaces which are inclined to one another, can be achieved in one and the same operation by means of the cleaning device. For example, can be cleaned by the roller brush a floor surface, while at the same time by the side brush a towering from this floor surface wall can be cleaned. This can allow particularly effective and comfortable cleaning of edge regions, for example when the cleaning device is guided along a path limiting curb or the like. In particular, to clean the wall or side surface, the cleaning device then does not need to be raised, as would be the case, for example, when using a conventional brush. The side brush can advantageously be arranged radially outside of the roller brush. In this case, the bristles of the side brush in the axial direction from the brush receiving space out, so protrude over the wall or cover of the brush receiving space. As a result, a wall, along which the cleaning device is guided along, can be cleaned particularly reliably and effectively by means of the side brush, without the wall or cover of the brush accommodating space or the housing of the cleaning device coming into contact with this wall. As a result, corresponding damage can be advantageously avoided.

In an advantageous embodiment of the present invention, the side brush on an annular and outwardly tapered, so axially outward i radial direction tapered first surface area from which the bristles of the side brush protrude at least substantially perpendicular to the outside with respect to this surface area , In other words, although viewed locally, the bristles of the side brush are at least substantially perpendicular to the surface area of the side brush, but this surface area is in the proper position of the side brush for example, compared to a cylindrical surface of the roller brush conically inclined, so tilted. Accordingly, then the bristles of the side brush in a corresponding tilted the angle to the bristles of the roller brush. The fact that the first surface area tapers conically here may in particular mean that it does not run perpendicular to a tangential plane adjacent to the lateral surface of the roller brush. Thus, the side brush has bristles that are inclined or tilted relative to the bristles of the roller brush, but with this include an angle different from 90 °. Through appropriate experiments it has been shown that a particularly good cleaning effect can be achieved by acting on the side brush brushed surfaces by such an arrangement and orientation of the bristles of the side brush. Due to the fact that the bristles of the side brush are in turn perpendicular to the first surface area of the side brush, a consistent producibility and arrangement of these bristles is advantageously made possible and an uneven loading of the bristles is avoided or reduced. The annular first surface area surrounds in the intended installation position of the side brush the axis or shaft of the cleaning device, on the intended purpose, the roller brush is to be arranged. As used herein, the term "first surface area" may be understood to mean a name or designation, and does not necessarily imply that there are or must be other surface areas or other surface areas of the side brush from which bristles stick out. However, this is not excluded.

In an advantageous embodiment of the present invention, the side brush on a second surface area, which is in the intended installation position of the brush, so the roller brush and the side brush, at least substantially perpendicular to the axis of the cleaning device. In this case, it is provided that at least some of the bristles of the side brush protrude outwardly at least substantially perpendicularly relative to this second surface area. In other words, extend in the intended installation position of the side brush then at least these some bristles in the axial direction, ie parallel to the axis on which the roller brush is arranged or to be arranged in the intended installation position. In this way, with a minimum length of these at least some bristles, a maximum range of the cleaning device can be achieved in the axial outward direction. In the radial direction, these bristles can be spaced from the axis about which the side brush rotates, so that during operation of the cleaning device, the bristles perform or describe a circular motion. The term "second surface area" may be understood here to mean a name or a name, so that it does not necessarily have to give one or the aforementioned first surface area. Preferably, however, both the mentioned first surface area and the second surface area may be provided in order to achieve an improved and consistent planar cleaning effect.

In an advantageous embodiment of the present invention, a tool-free reversible detachable mechanical connector is provided by means of which the side brush is connected by axial plugging on an axially outer end of the roller brush with this. In other words, therefore, the side brush can be plugged in the axial direction on the roller brush and is then held by means of the plug connection to the roller brush. The side brush then rotates together with the roller brush about a common axis, but not relative to the roller brush. The connector can be realized for example by one or preferably a plurality of pins and corresponding receptacles. The pins may preferably be arranged on the side brush and the corresponding receptacles preferably on the roller brush. This obstruction by the pins is avoided when the cleaner is operated or used without attached side brush. The connector can, for example, against a screw, in which the side brush is screwed onto the axis or the roller brush, have the advantage that the connector during operation of the cleaning device will not solve due to the rotational movement of the axis and brushes.

The fact that the connector between the roller brush and the side brush tool-free reversible solvable, the side brush can be solved by a particular user even during field use of the cleaning device particularly simple, comfortable and fast and removed. This, in turn, advantageously makes it possible for the cleaning device to be brought particularly close to a wall or edge, so that a corresponding bottom surface can be reliably cleaned up to a corresponding edge on which, for example, a wall or boundary can rise. Likewise, by the proposed here embodiment of the cleaning device a particularly simple replacement of the side brush, for example, against another suitable for a different surface or other conditions for use side brush or wear of the side brush allows. This also advantageously contributes to a particularly flexible and comfortable usability of the invention Cleaning device and can contribute to an improved cleaning result.

In an advantageous embodiment of the present invention, a respective length of the bristles of the roller brush and the bristles of the side brush and an angle at which these bristles are in the proper installation position of the brushes to each other, so matched to one another that in the intended installation position of the brushes at least some of the bristles the roller brush and at least some of the bristles of the side brush on a common, the brushes cylindrically surrounding imaginary envelope surface. In other words, when the cleaning device is guided over a flat surface to be cleaned, the bristles of the roller brush and of the side brush, which respectively face this surface, can then reach the surface in a straight line. As a result, on the one hand, a region which can be cleaned in one operation by means of the cleaning device can advantageously be increased and, on the other hand, an uneven loading of the two brushes can advantageously be avoided. The latter can contribute both to a uniform and consistent cleaning result as well as improve the ease of use of the cleaning device, since the cleaning device can be performed evenly and consistently with consistent force along the surface to be cleaned by the proposed embodiment here.

In an advantageous embodiment of the present invention, the side brush bristles whose length measured radially outward from an outer solid surface of the side brush 25 mm to 40 mm, preferably 30 mm to 35 mm. The outer solid surface may here be, for example, the said first surface area or said second surface area. With the bristle length proposed here, according to experience a particularly good cleaning result can advantageously be achieved, while at the same time a necessary effort of the electric motor for driving the brushes and a respective user to use the cleaning device can be limited to a comparatively easy and comfortable level to be reached. For example, much longer bristles could tend to over-bend and then dissolve or carry away less efficiently on the surface to be cleaned. In contrast, with much shorter bristles, gaps between the bristles may become too easy and too fast to become soiled with dirt, which may also limit the cleaning action of the brushes.

In a further advantageous embodiment of the present invention, the cleaning device comprises said roller brush, wherein the bristles of the roller brush in the radial direction outwardly from a cylindrical outer side of the roller brush measured a length of 22 mm to 30 mm, preferably from 26 mm to 28 mm. As here mentioned outside of the roller brush, for example, be said lateral surface or an outside surface of said shell element. Also with respect to the bristle lengths proposed here, the corresponding explanations apply to the bristle lengths of the side brush.

The different lengths described here for the bristles of the side brush and the bristles of the roller brush are justified, for example, with the different angles of the bristles they have to the axis or to a respective surface to be cleaned.

In a further advantageous embodiment of the present invention, the cleaning device comprises at least one brush whose bristles are made of a polyamide and have a diameter of 0.9 mm. This diameter is to be understood here to tolerances, which may be approximately in the range +/- 0.075 mm. The brush mentioned here may in particular be the aforementioned roller brush and / or the said side brush. As the polyamide material for the bristles, for example, nylon or PA6 or the like can be used. It has been found that the brush proposed as a universal brush, ie for cleaning a variety of different surfaces by the proposed combination of material and diameter or thickness of the bristles. Thus, for example, stone, artificial turf and flow surfaces as well as a variety of other surfaces can be cleaned reliably and at the same time without damage with a brush designed in this way. At the same time, bristles designed in this way are advantageously easy and inexpensive to produce using established methods.

In a further advantageous embodiment of the present invention, the cleaning device comprises at least one brush for cleaning wood surfaces whose bristles are made of a polyamide and have a diameter of 0.6 mm. The brush mentioned here may in particular be the aforementioned roller brush and / or the said side brush. Again, the indication of the diameter of the bristles is to be understood to tolerances, which may for example be in the range of +/- 0.075 mm. Experience has shown that a brush designed as proposed here is particularly suitable for more sensitive surfaces, such as wood surfaces. This is the case because the smaller diameter of the bristles makes them softer and more flexible, so for example scratching myself accordingly designed brush cleaned surfaces can be particularly reliably avoided.

In a further advantageous embodiment of the present invention, the cleaning device has a brush for cleaning stone or metal surfaces whose bristles consist of a metal wire and have a diameter of 0.15 mm to 0.5 mm, preferably of 0.3 mm. The brush mentioned here may in particular be the aforementioned roller brush and / or the said side brush. Again, the specified diameter to understand tolerances, which may for example be in the range of +/- 0.075 mm. By the proposed here production or design of the bristles of the metal wire, the bristles and thus the brush are particularly robust and at the same time particularly effective against dirt, especially harder encrustations and the like. At the same time can be ensured by the diameter of the bristles proposed here, a sufficient flexibility of the bristles, whereby both a force to be applied by the electric motor often and by a respective user or user of the cleaning device during operation of the cleaning device can be advantageously limited.

In an advantageous embodiment of the present invention, the metallic bristles of the at least one brush are made of brass-coated steel. It has been shown that a particularly good compromise can be achieved both for the cleaning effect and the robustness of the corresponding brush, for example, taking into account a stability, flexibility and wear of the bristles and a mechanical load of each to be cleaned, so by the respective brush acted upon surface.

In a further advantageous embodiment of the present invention, the brush receiving space is limited starting from the axis in at least one radial direction by a circumferentially partially around the axis or the brush receiving space around curved cover or wall. This cover or wall is open in the axial direction. Next, the cleaning device according to the invention then from the outside in the radial direction on the cover reversibly attachable lateral boundary elements, which when they are plugged onto the cover, limit the brush receiving space in the axial direction. In other words, the lateral boundary elements can thus be plugged onto the cover to close the brush receiving space in the axial direction. The lateral limiting elements can be removed from the cover or staked to open the brush receiving space in the axial direction or release. This is particularly advantageous, since this is associated with increased flexibility in the usability and applicability of the cleaning device. This in turn can contribute to an improved cleaning result as well as to an improved comfort of use. For example, can be prevented by attaching the boundary elements that during operation of the cleaning device dirt and / or water in the axial direction, ie laterally, is ejected from the brush receiving space. On the other hand, with one or both removed boundary elements said side brush can be plugged so that then as described not only a bottom surface, but also a side wall or the like, on which the cleaning device is guided along, can be cleaned in one operation.

The limiting elements may follow in their shape a cross section of the brush receiving space or accordingly. Thus, an upper edge of the boundary elements may have a curved course, while a lower edge of the boundary elements may be straight, for example. When the cleaning device is used, when the cleaning device is thus guided along a surface to be cleaned, the lower edge can then extend at least substantially parallel to this surface in the intended direction of movement of the cleaning device. The delimiting elements can preferably be designed to be at least essentially or fundamentally disk-shaped, that is to say have a thickness or wall thickness which is small in comparison to its diameter or its extent in its main extension plane. As a result, the cleaning device is particularly space-saving and weight-saving, so easy to be configured. Viewed from the outside in the axial direction, the lateral boundary elements can thus at least largely conceal the axis as well as the roller brush which may have been plugged or arranged thereon. Even if no side brush is to be plugged or used, the removal of the lateral boundary elements may be advantageous because then a particularly close to the edge cleaning by means of the roller brush can be made possible, for example, when the cleaning device is guided along a wall or side boundary.

In a further advantageous embodiment of the present invention, the cleaning device on a speed control for manually setting a speed of the electric motor. A designed as a knob control element of the speed control is integrated into the handle of the cleaning device, that is arranged on the stem and preferably at least partially embedded in the stem. Particularly preferred may be a stepless adjustment or regulation of the speed by appropriate rotation of the rotary control be provided. The integration or arrangement of the rotary control in or on the handle of the cleaning device, the knob during an operation or use of the cleaning device by a user can be advantageously particularly easy and comfortable to reach. Thus, the rotational speed of the electric motor can then be adapted or adjusted as needed during operation of the cleaning device by the respective end user, in particular without the respective user would have to set off or turn off the cleaning device. As a result, it is possible, for example, to respond to particularly heavily soiled subregions to be cleaned by increasing the rotational speed according to the situation in order to achieve a particularly good cleaning result there. For less heavily soiled surface areas, the speed can be reduced as needed, for example, to allow the most energy-saving and low-noise operation of the cleaning device.

In a further advantageous embodiment of the present invention, the electric motor for operation with different rotational inside, so set up in opposite directions of rotation. The cleaning device then has an arranged on the handle or in the handle integrated control element for manually switching the direction of rotation of the electric motor. In other words, a respective user by pressing or operating the control element so a rotation inside or a direction of rotation of the electric motor and thus a direction of rotation of the axis and ultimately the roller brush and optionally a plugged side brush switch or switch. By switching or adjusting the direction of rotation or the direction of rotation of the electric motor, for example, a movement or guide direction in which the cleaning device is guided by the respective user on or along the surface to be cleaned in each case can be advantageously supported. In contrast, a user would lead the cleaning device alternately forward and backward over some surface to be cleaned, without causing the direction of rotation of the electric motor, for a cleaning effect of the cleaning device depending on the direction in one of the two directions could be worse than in the other direction and the other the rotation of the roller brush counteract the movement of the cleaning device on the surface. The arrangement of the operating element for switching the direction of rotation of the handle a particularly comfortable operation of the operating element by a respective user of the cleaning device is possible. By switching or the reversibility of the direction of rotation of the electric motor, an improved cleaning result and an improved ease of use of the cleaning device can thus be achieved overall.

In an advantageous embodiment of the present invention, the cleaning device to a mechanical and / or electronic lock, which automatically prevents switching of the direction of rotation of the electric motor, as long as each current speed of the electric motor is greater than a predetermined threshold. This threshold value can be specified, for example, in revolutions per minute or correspond to a specific number of revolutions of the electric motor. The threshold value can be, for example, depending on the design of the electric motor and / or the corresponding control element, 0 or greater than 0. By the barrier provided here can be advantageously particularly reliably prevented that the sense of rotation of the electric motor is switched accidentally during operation of the cleaning device. As a result, any possibly unforeseen behavior of the cleaning device as well as damage to the electric motor can be avoided particularly reliably.

In a further advantageous embodiment of the present invention, the handle of the cleaning device as, in particular stepless, variable-length telescopic handle of a plurality of mutually, in particular, each other, sliding telescopic or handle elements formed. In other words, these handle elements can therefore be telescoped, that is to say shifted against one another, in order to adapt or set a length of the handle. By such a requirement by a user manually, preferably without tools, feasible adjustment or adjustment of the length of the deal, the cleaning device can advantageously by different users and / or in different situations or for different applications or applications each with optimally adapted ergonomics and thus overall improved comfort be handled. In addition, by a corresponding change in length of the telescopic handle surface areas may optionally be reached and cleaned by means of the cleaning device, which would otherwise not be reached by means of the cleaning device. Thus, the cleaning liquid of the cleaning device can be advantageously supported by the presently provided variable-length telescopic handle.

In an advantageous embodiment of the present invention, a locking element is arranged on the telescopic handle that for releasing a change in length of the telescopic handle is detachable and can be fixed for locking the length of the telescopic handle. In other words, by closing or fixing the locking element, the handle elements of the telescopic handle So be fixed relative to each other, so that the length of the telescopic handle when using the cleaning device then can not change automatically in an unintentional or unforeseen way. Characterized in that for enabling or preventing the change in length, the locking element is specifically provided, a particularly safe and comfortable use of the cleaning device can be advantageously made possible. Thus, for example, the likelihood that a respective user of the cleaning device changes the length of the telescopic handle unintentionally or unconsciously can be reduced by the locking element.

In an advantageous embodiment of the present invention, the locking element is rotatable about the longitudinal extension direction of the handle, wherein by turning the locking element in a first direction, the change in length and releasable by turning the locking element in a second direction, the handle elements for fixing the length of the telescopic handle against each other. In other words, therefore, a functional mechanism of the locking element can be based on various known screw caps, whereby a particularly simple and intuitive and thus comfortable operation of the locking element is made possible. Another advantage of the proposed embodiment of the locking element is that in this way the locking element is independent of a relative position of the cleaning result or the telescopic handle relative to the respective user particularly reliable and easy and thus particularly comfortable reach. It is also advantageous that in this case no operating element or the like projecting perpendicularly in one direction to the longitudinal extension direction of the handle has to be provided as part of the locking element in order to enable its comfortable operation or actuation. As a result, a profile of the telescopic handle can be advantageously kept particularly narrow and smooth, which in turn the cleaning device can be used particularly comfortable even under limited or tight spaces and can be prevented, for example, that said water hose to the corresponding control element or a corresponding lever or the like caught.

In a further advantageous embodiment of the present invention, an auxiliary handle is arranged on the handle, the laterally, in particular at an angle between 30 ° and 150 °, preferably at an angle of 90 °, relative to the longitudinal direction of the stem, protrudes away from the stem. Such an additional handle thus offers a respective user a further handle or a further point of action for guiding or handling the cleaning device, whereby a further improved ease of use can be achieved. Due to the fact that the additional handle protrudes angularly from the handle, the respective user can advantageously apply or exert leverage or leverage in a particularly simple manner in order to position the cleaning appliance in a particularly simple and precise manner. This can be seen in particular, for example, with respect to two gripping regions of the stem, which are arranged spaced apart from one another only along the length of the longitudinal extension direction.

In an advantageous embodiment of the present invention, a holder is provided, by means of which the additional handle can be fixed without tools from the stem and fixed to the handle, so that the auxiliary handle can be arranged manually at different positions along the longitudinal extension direction of the stem. In other words, therefore, the additional handle can be fixed at different points of the stem. This allows a particularly ergonomic and thus particularly comfortable handling of the cleaning device in different situations and / or for different users. The holder may, for example, engage around the handle and thereby be clamped to the handle or be designed, for example, as a clamp whose legs engage around the handle and can be screwed or clamped together. In this case, a corresponding screw can then have a common grip area, so that it can be released and screwed manually without tools. Likewise, in the stem, for example, a perforated strip, so a number of along the longitudinal extension direction of the stem spaced from each other arranged holes, in particular screw holes may be arranged. At this perforated strip or these holes then the auxiliary handle can be set in different positions, that is fixed, for example, by a respective plug or screw.

In an advantageous embodiment of the present invention, the additional handle has a substantially bow-shaped shape. Thus, the additional handle surrounds at least one level - at least in common with the stem - an open, durchgreifbaren by a respective user inside area. The additional handle itself or the additional handle in combination with the handle then form a - not necessarily round - ring when fixed to the handle additional handle. As a result, the respective user along this ring advantageously different grip or gripping positions are offered so that he can handle the cleaning device very safe, reliable and comfortable. The fact that the ring is closed, the tangible interior area in the at least one level so completely surrounded by the material of the additional handle or surrounded, offers the additional handle the respective user also advantageously improved protection, such as a hand used to grip the additional handle.

In an advantageous embodiment of the present invention, it is provided that as a hose guide for said water hose of the additional handle in the at least one level a separate area which is open to the vertical through this area completely encloses in the plane, so that the water hose through the separate area can be guided or threaded and then by the additional handle, in the alternative, the thus formed hose guide at least partially along the stem can be fed. In other words, the additional handle thus has a dual functionality as a handle for the respective user and as a hose guide. Characterized in that two separate, each completely enclosed in the at least one level tangible areas are provided, but it prevents that when guided through the hose guide water hose this can beat the user's hand when the user the additional handle in the of the hose guide seizes or encompasses a separate area.

Particularly preferably, the separate area provided as a hose guide can advantageously be smaller than the area provided for the user as a grip area. As a result, the hose can be guided with particularly little clearance and / or particularly close to the handle of the cleaning device, which can result in a particularly simple and comfortable handling of the cleaning device.

For subdividing the region provided as a hose guide and the area provided as a penetration region for the user, at least one transverse web can be arranged in the plane in which the additional grip encloses these regions, which connects mutually opposite subsections of the additional grip.

The invention also includes combinations of the described embodiments and further developments and / or combinations of individual features of various embodiments and developments.

• 1 eine schematische ausschnittweise Perspektivansicht eines elektrischen Reinigungsgeräts;
• 2 eine schematische Ansicht einer Unterseite des Reinigungsgeräts aus 1;
• 3 eine schematische ausschnittweise Perspektivansicht eines Bürstenaufnahmeraums des Reinigungsgeräts aus 1, wobei eine Walzenbürste abmontiert ist;
• 4 eine schematische Seitenansicht einer Walzenbürste für das Reinigungsgerät aus 1 mit aufgesteckter Seitenbürste;
• 5 eine schematische ausschnittweise Detailansicht eines Wasseranschlusses der Reinigungsbürste aus 1 für einen Wasserschlauch;
• 6 eine schematische Perspektivansicht auf einen Zusatzgriff des Reinigungsgeräts aus 1;
• 7 eine schematische ausschnittweise Detailansicht eines Teils eines Stiels des Reinigungsgeräts aus 1 mit Bedienelementen für eine Motordrehzahl und eine Motordrehrichtung des Reinigungsgeräts; und
• 8 eine schematische ausschnittweise Unteransicht auf das Reinigungsgerät.

In the following, embodiments of the invention are described. It shows

• 1 a schematic fragmentary perspective view of an electric cleaning device;
• 2 a schematic view of a bottom of the cleaning device 1 ;
• 3 a schematic fragmentary perspective view of a brush receiving space of the cleaning device 1 wherein a roller brush is removed;
• 4 a schematic side view of a roller brush for the cleaning device 1 with attached side brush;
• 5 a schematic detail of a detailed detail of a water connection of the cleaning brush 1 for a water hose;
• 6 a schematic perspective view of an additional handle of the cleaning device 1 ;
• 7 a schematic fragmentary detail view of a portion of a stem of the cleaning device 1 with controls for an engine speed and a motor rotation direction of the cleaning device; and
• 8th a schematic fragmentary bottom view of the cleaning device.

The exemplary embodiments explained below are preferred embodiments of the invention. In the exemplary embodiments, the described components of the embodiments each represent individual features of the invention, which are to be considered independently of one another, which each further develop the invention independently of one another and thus also individually or in a different combination than the one shown as part of the invention. Furthermore, the described embodiments can also be supplemented by further features of the invention already described.

In the figures, identical, functionally identical or mutually corresponding elements are each identified by the same reference numerals.

1 shows a schematic fragmentary perspective view of an electric cleaning device 1 for motor assisted brushing, ie cleaning of surfaces. The cleaning device 1 has a housing here 2 in which an electric motor is arranged. For electrically supplying the electric motor, the housing 2 also a battery holder, in the present case a battery 3 is arranged. Front is on the housing 2 a cover 4 a brush receiving space 16 (please refer 3 ), in which a brush is arranged for brushing a surface to be cleaned in each case. The brush receiving room 16 is upwards, in this case, for example, in the direction of the battery 3 through the cover 4 covered, but down, so to the respective surface to be cleaned, open.

The back is located on the housing 2 in the present case a water connection 5 for connecting a water hose, for example a conventional garden hose. Upwardly extends from the housing 2 an elongated stalk 6 acting as a handle or handle for a user of the cleaning device 1 serves.

Present is the stem 6 designed as a variable-length telescopic handle, which is indicated here by a corresponding double arrow. To release and lock the length adjustment of the stem 6 Here is a locking element 7 intended. The locking element 7 can about a longitudinal direction or longitudinal axis of the stem 7 be manually rotated to telescopic handle elements of the stem 6 to make mutually displaceable or relative to each other.

2 shows a schematic bottom view of the cleaning device 1 So a view in the downwardly open brush receiving space 16 , The brush receiving room 16 is here bounded or defined by the curved cover 4 and an imaginary link plane between their edges. In order to produce an improved and denser contact with the respective surface to be cleaned and, where appropriate, for sweeping on the surface of existing dirt particles are along these edges of the cover 4 respective rubber lips 8th arranged. In the axial direction is the cover 4 open. The recording room 16 is present in the axial direction on one side but by an axially from the outside to the cover 4 attachable lateral limiting element 9 limited or completed. A corresponding limiting element can also be opposite on the other side of the brush receiving space 16 on the occultation 4 be attached to the brush receiving space 16 then complete axially in this or in both directions.

In the brush receiving room 16 Here are a first roller brush 10 and a second roller brush 11 on a not visible here, through the brush receiving space 16 extending axis or shaft 17 (please refer 3 ) arranged. The roller brushes 10 . 11 have radially from the outer sides or lateral surfaces 28 outstanding bristles 12 on. The roller brush 10 . 11 are mechanical about the axis 17 and a longitudinal center in the brush accommodating space 16 arranged coupling area 13 mechanically connected to the electric motor. By means of the electric motor are thus the roller brush 10 . 11 around the axis 17 rotatable.

In the present case is the brush receiving space 16 as described only on one side by the limiting element 9 completed. Opposite is the brush receiving room 16 open, with a side brush on this page 14 on the second roller brush 11 attached axially. The side brush 14 has in this case side bristles 15 on, facing the bristles 12 the roller brush 10 . 11 extend angled. In the present case, the side bristles extend 15 in the axial direction, ie at least substantially at an angle of 90 ° to the bristles 12 the second roller brush 11 , Thus, the cleaning device 1 for example, to clean a floor surface moves on this, and are guided along a vertically rising from the bottom surface wall or boundary, which then by the side brush 14 or the side bristles 15 can also be cleaned. The side brush 14 is mechanically with the second roller brush 11 coupled and thus rotates synchronously with this.

Other than shown here, as required, the limiting element 9 removed and instead the side brush 14 or another corresponding side brush on the other side on the first roller brush 10 be attached. Thus, the cleaning device 1 so flexibly adaptable to the respective conditions of use.

3 shows a schematic fragmentary perspective view of the cleaning device 1 overlooking the brush receiving space 16 , Here is the second roller brush 11 from the axis 17 subtracted, so the axis 17 partially visible. To hold the roller brush 10 . 11 on the axis 17 In this case, a locking mechanism is provided which is in the axis 17 is integrated. To the roller brush 10 . 11 from the axis 17 To be able to pull off, no tool is necessary, but it has only one here on the front side in the axis 17 integrated button 18 be pressed in the axial direction to here the second roller brush 11 release. With pressed in button 18 can the second roller brush 11 then axially outward from the axis 17 subtracted from. On an opposite side not visible here, a corresponding button for releasing the first roller brush 10 be arranged. Likewise, the locking mechanism can be designed such that only the button 18 pressed, so must be pressed to both roller brush 10 . 11 to release, that is from the axis 17 to deduct.

4 shows a schematic side view of the second roller brush 11 with attached side brush 14 in an alternative embodiment. In the embodiment shown here, the side brush 14 a surface area 19 on, which tapers comically in the axial direction outwards and thus obliquely or tilted to the lateral surface 28 the second roller brush 11 disposed is. Here are the side bristles 15 from the surface area 19 out and thus extend obliquely to the bristles 12 the second roller brush 11 in an angle different from 0 ° and 90 °.

This angle as well as the lengths of the bristles 12 . 15 are coordinated so that the bristles 12 the second roller brush 11 and the side bristles 15 the side brush 14 in the radial direction at a common here schematically indicated imaginary cylindrical, the brushes 11 . 14 enclosing envelope surface 20 end up. This is true for at least some of the bristles 12 and the side bristles 15 ,

5 shows a schematic fragmentary perspective detail view on a rear side of the cleaning device 1 , In particular, here is the water connection 5 shown in detail. The water connection 5 is present here as part of a conventional plug connection, so that a water hose by simply plugging on the water connection 5 with the cleaning device 1 can be connected, with a high tensile but without tools detachable and at the same time waterproof connection between the water hose and the water connection 5 can be produced. Not visible here extends internally in the cleaning device 1 a passage or a conduit through the out of the water hose into the water connection 5 entering water into the brush reception room 16 can flow.

6 shows a schematic perspective detail view of one of the stem 6 of the cleaning device 1 arranged additional handle 21 , The additional handle 21 is by means of a clamp-like holder on the stem 6 held. There is a screw 22 with a handle for tool-free turning of the screw 22 provided to manually open and close the holder. When the holder is open, the additional handle 21 in the longitudinal direction of the stem 6 be moved to different positions. If a suitable position is found, then the screw can 22 be attracted to the auxiliary handle 21 in the selected position on the stem 6 set.

The additional handle 21 here has a substantially arcuate or bow-shaped shape, so surrounds an inner area in a plane 23 completely ring-shaped. In this case, there are two transverse webs 24 provided within that of the auxiliary handle 21 enclosed or surrounded area extending in said plane. Through the crossbars 24 So a subdivision is achieved, resulting in two of the interior 23 separate likewise in the mentioned level by the additional handle 21 fully enclosed areas. These separate areas form hose guides here 25 through which said water hose can be passed. Both the interior 23 as well as the hose guides 25 are perpendicular to the said plane open, so durchgreifbar.

7 shows a schematic fragmentary detail view of a part of the stem 6 of the cleaning device 1 , In the part of the stem shown here 6 are present an operating element 26 for a speed control of the electric motor and a switch 27 arranged for manually switching a direction of rotation or a direction of rotation of the electric motor. The operating element 26 for the speed regulation is as part of the stem 6 embedded or integrated rotary wheel, that is designed as a rotary control, for a preferably stepless regulation or adaptation of an engine speed of the electric motor. The desk 27 however, may have two switching positions corresponding to the two possible opposite directions of rotation of the electric motor. The operating element 26 and the switch 27 can be preferred over internally in the stem here 6 extending electrical lines or signal lines to be connected to the electric motor or a motor control or a control device for controlling the electric motor.

8th shows another example of a schematic bottom view of the cleaning device 1 with the two in the brush receiving room 16 arranged roller brushes 10 . 11 and the second roller brush 11 attached side brush 14 , Again, the roller brushes 10 . 11 the respective bristles 12 on, at least substantially perpendicular to the respective lateral surface 28 stand. In addition, the two roller brushes 10 . 11 here but oblique bristles 29 up, sloping to the bristles 12 and the lateral surfaces 29 stand. The oblique bristles 29 are each in the direction of the other of the two roller brushes 10 . 11 , ie in the direction of the coupling area 13 , tilted or tilted. This covers the sloping bristles 29 the coupling area 13 at least partially. Also the side brush 14 here has two differently arranged sets of bristles. On the one hand, these are the diagonal side bristles 15 , On the other hand, these are just bristles 30 , In installation position of the side brush 14 So if these on one of the roller brushes 10 . 11 is attached and the corresponding roller brush 10 . 11 on the axis 17 in the brush receiving room 16 is located, the straight bristles extend 30 at least substantially parallel to the axis 17 , The straight bristles are of the annular arranged obliquely side bristles 15 surround. By combining the side bristles 15 and the straight bristles 30 can be advantageously achieved a particularly thorough and uniform surface cleaning or cleaning effect.

Overall, the embodiments described and illustrated here show how advantageous an improved brush-based device can be designed for the effective and comfortable motor-assisted cleaning of surfaces.

LIST OF REFERENCE NUMBERS

1

cleaner

2

casing

3

battery pack

4

cover

5

mains water supply

6

stalk

7

locking element

8th

rubber lip

9

limiting element

10

first roller brush

11

second roller brush

12

Bristles (the roller brushes)

13

coupling region

14

side brush

15

page bristles

16

Brush receiving chamber

17

axis

18

button

19

Surface area (the side brush)

20

envelope

21

auxiliary handle

22

screw

23

interior

24

crossbars

25

hose guide

26

Operating element (for speed regulation)

27

Switch (for engine rotation)

28

lateral surface

29

oblique bristles (the roller brushes)

30

straight bristles (the side brush)

Claims (33)

Electric cleaning device (1) for motor-assisted cleaning of surfaces, comprising - A housing (2) with a motor receiving space, in which an electric motor is arranged, with an electrically connected to the electric battery holder for receiving at least one battery (3) for the electrical supply of the electric motor and a partially to an environment of the cleaning device (1) open brush receiving space (16) in which at least one mechanically coupled to the electric motor and driven by this axis (17) for receiving at least one roller brush (10, 11) for cleaning the surfaces, - An elongated stem (6) which is connected to the housing (2) and extending therefrom, wherein a longitudinal extension direction of the stem (6) extends at least substantially perpendicular to the axis (17), and - A water connection (5) for connecting a water hose, extending from the water connection (5) into the brush receiving space (16) has a passage through which water can flow. Cleaning device (1) after Claim 1 , characterized in that the battery holder has a peripheral seal, which abuts when inserted into the battery holder accumulator on this. Cleaning device (1) according to any one of the preceding claims, characterized in that the battery holder has at least two slots for at least two batteries (3) for the serial and / or parallel electrical supply of the electric motor. Cleaning device (1) according to any one of the preceding claims, characterized in that in a cleaning direction of the surfaces provided for the movement direction of the cleaning device (1) which extends at least substantially perpendicular to the axis (17) and the handle (6), the brush receiving space ( 16) on a front side of the cleaning device (1) and the water connection (5) are arranged opposite one another on a rear side of the cleaning device (1). Cleaning appliance (1) according to one of the preceding claims, characterized in that the axis (17) has two sub-sections, which are provided by a central coupling region (13) via which the mechanical coupling of the axle (17) to the electric motor extending opposite directions, wherein on each of the subsections of the coupling region (13) facing away from ends of a respective roller brush (10, 11) can be plugged. Cleaning device (1) after Claim 5 , characterized in that the cleaning device (1) the two, on the subsections of the axis (17) attachable roller brushes (10, 11), wherein the roller brushes (10, 11) each have oblique bristles (29), which obliquely to a cylindrical surface (28) of the respective roller brush (10, 11), so that when both roller brushes (10, 11) are mounted on the axle (17), the oblique bristles (29) in the direction of the other roller brush (10; 11) are tilted and the coupling region (13) at least partially cover. Cleaning device (1) according to one of the preceding claims, characterized in that the at least one roller brush (10, 11) without tools on the axis (17) attachable and without tools of the axis (17) is releasable. Cleaning device (1) after Claim 7 , characterized in that in the axis (17) is a manually releasable locking mechanism for holding the roller brush (10, 11) on the axis (17) is integrated. Cleaning device (1) after Claim 8 , characterized in that the locking mechanism comprises at least one pin and a spring-loaded button (18) mechanically coupled thereto, wherein the button (18) on an end face of the axis (17) surrounded by a jacket element forming the axis (17) (28) arranged and along a longitudinal central axis of the axis (17) is pressed, wherein the at least one pin for holding the roller brush (10, 11) at least substantially perpendicular to the longitudinal central axis radially outwardly beyond the jacket member (28) and for releasing the roller brush (10, 11) is retracted by pressing the button (18) radially inwardly into the jacket element (28). Cleaning device (1) after Claim 9 , characterized in that the locking mechanism comprises at least one spring element, by the spring force of the key (18) axially outwardly and the at least one pin are pressed radially outward. Cleaning device (1) according to one of Claims 9 to 10 , characterized in that the at least one pin and / or the roller brush (10, 11) has a relative to a direction of movement of the pin when pressing the button (18) beveled contact area at which when attaching the roller brush (10, 11) on the Axis (17) of the pin and the roller brush (10, 11) come into contact with each other, so when plugging the roller brush (10, 11) of the pin is initially pressed against a spring force radially inwardly until it by the spring force radially outward is pressed as soon as he is no longer covered by the roller brush (10, 11). Cleaning device (1) according to one of the preceding claims, characterized in that the cleaning device (1) comprises at least one roller brush (10, 11) with radially outwardly projecting bristles (12) and additionally at least one side brush (14) with bristles (15). , which in the installation position of the brushes (10, 11, 14) are inclined to the bristles (12) of the roller brush (10, 11). Cleaning device (1) after Claim 12 , characterized in that the side brush (14) has an annular and tapered outwardly tapered first surface region (19) from which the bristles (15) of the side brush (14) protrude at least substantially perpendicularly to the outside with respect to this surface region (19) , Cleaning device (1) according to one of Claims 12 to 13 , characterized in that the side brush (14) has a second surface area, which is in the proper installation position of the brush (10, 11, 14) at least substantially perpendicular to the axis (17), wherein at least some of the bristles (15) of the side brush (14) protrude outwardly at least substantially perpendicularly with respect to this second surface area. Cleaning device (1) according to one of Claims 12 to 14 , characterized in that a tool-free reversible releasable mechanical connector is provided by means of which the side brush (14) by axial plugging on an axially outer end of the roller brush (10, 11) is connectable to this. Cleaning device (1) according to one of Claims 12 to 15 , characterized in that a respective length of the bristles (12) of the roller brush (10, 11) and the bristles (15) of the side brush (14) and an angle at which these bristles (12, 15) in the intended installation position of the brush ( 10, 11, 14) are mutually aligned, so that in the intended installation position of the brushes (10, 11, 14) at least some of the bristles (12) of the roller brush (10, 11) and at least some of the bristles (15) the side brush (14) on a common, the brush (10, 11, 14) cylindrical surrounding imaginary envelope surface (20) ends. Cleaning device (1) according to one of Claims 12 to 16 , characterized in that the side brush (14) has bristles (15) whose length measured radially outwardly from an outer solid surface of the side brush (14) 25 mm to 40 mm, preferably 30 mm to 35 mm. Cleaning device (1) according to one of the preceding claims, characterized in that the cleaning device (1) comprises the roller brush (10, 11) and the bristles (12) of the roller brush (10, 11), in the radial direction outwardly from a cylindrical outside of the roller brush (10, 11) measured, a length of 22 mm to 30 mm, preferably from 26 mm to 28 mm. Cleaning device (1) according to one of the preceding claims, characterized in that the cleaning device (1) comprises at least one brush (10, 11, 14) whose bristles (12, 15) consist of a polyamide and a diameter of 0.9 mm to have. Cleaning device (1) according to one of the preceding claims, characterized in that the cleaning device (1) comprises at least one brush (10, 11, 14) for cleaning wood surfaces, the bristles (12, 15) consist of a polyamide and a diameter of 0.6 mm. Cleaning device (1) according to one of the preceding claims, characterized in that the cleaning device (1) comprises at least one brush (10, 11, 14) for cleaning stone or metal surfaces whose bristles (12, 15) consist of a metal wire and have a diameter of 0.15 mm to 0.5 mm, preferably of 0.3 mm. Cleaning device (1) after Claim 21 , characterized in that the bristles (12, 15) consist of brass-coated steel. Cleaning device (1) according to one of the preceding claims, characterized in that the brush receiving space (16), starting from the axis (17) in at least one radial direction by a circumferentially in regions about the axis (17) bent around cover (4) is limited , which is open in the axial direction, and the cleaning device (1) from the outside in the radial direction on the cover (4) reversibly attachable lateral limiting elements (9), which, when attached to the cover (4), the brush receiving space ( 16) in the axial direction. Cleaning device (1) according to one of the preceding claims, characterized in that the cleaning device (1) has a speed control for manually setting a rotational speed of the electric motor, wherein a control knob (26) formed as control element of the speed regulation in the stem (6) of the cleaning device ( 1) is integrated. Cleaning device (1) according to one of the preceding claims, characterized in that the electric motor is set up for operation with different rotation inside and the cleaning device (1) on the handle (6) arranged control element (27) for manually switching the direction of rotation of the electric motor. Cleaning device (1) after Claim 25 , characterized in that the cleaning device (1) has a mechanical and / or electronic lock, which automatically prevents switching of the direction of rotation of the electric motor, as long as each current speed of the electric motor is greater than a predetermined threshold. Cleaning device (1) according to any one of the preceding claims, characterized in that the handle (6) of the cleaning device (1) as, in particular continuously, variable-length telescopic handle (6) of a plurality of mutually, in particular, one another, movable handle elements is formed. Cleaning device (1) after Claim 27 , characterized in that on the telescopic handle (6) a locking element (7) is arranged, which for releasing a change in length of the telescopic handle (6) releasably and for locking the length of the telescopic handle (6) can be fixed. Cleaning device (1) after Claim 28 , characterized in that the locking element (7) about the longitudinal extension direction of the handle (6) is rotatably formed by releasing the locking element (7) in a first direction, the length change and releasably by rotating the locking element (7) in a second direction Handle elements for fixing the length of the telescopic handle (6) against each other can be fixed. Cleaning device (1) according to any one of the preceding claims, characterized in that on the stem (6) an additional handle (21) is arranged laterally, in particular at an angle between 30 ° and 150 °, preferably at an angle of 90 °, with respect to the longitudinal extension direction of the stem (6), projects away from the stem (6). Cleaning device (1) after Claim 30 , characterized in that a holder is provided, by means of which the auxiliary handle (21) without tools of the stem (6) releasably and on the stem (6) can be fixed, so that the auxiliary handle (21) manually at different positions along the longitudinal direction of the stem (6) can be arranged. Cleaning device (1) according to one of Claims 30 to 31 , characterized in that the additional handle (21) has a substantially bow-shaped shape and thus in at least one plane at least together with the stem (6) an open, by a user durchgreifbaren inner region (23) of the auxiliary handle (21) completely surrounds. Cleaning device (1) according to one of Claims 30 to 32 , characterized in that as hose guide (25) for the water hose of the Additional handle (21) in the at least one level a separate area (25), which is openly durchgreifbar perpendicular to this plane in the plane completely encloses, so that the water hose can be threaded through the separate area (25) and then by the additional handle ( 21) at least partially along the stem (6) is feasible.

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