Nozzle attachment, suction nozzle, cleaning device hose, and cleaning device

Abstract

The invention relates to a nozzle attachment for a handpiece of a cleaning device, in particular for a handpiece of a spray-extraction device or a steam vacuum cleaner, the nozzle attachment comprising a nozzle suction channel and a nozzle fluid channel which is fluidically separated therefrom, the nozzle fluid channel having at least one fluid outlet at the distal end for discharging a cleaning fluid, the nozzle suction channel having a suction-channel inlet at the distal end for receiving dirty liquid, the nozzle attachment comprising at least one cleaning element arranged or formed on a support element, and the at least one fluid outlet being arranged or formed on the support element. The invention also relates to a suction nozzle, to a cleaning device hose, and to a cleaning device.

Description

[0001] Nozzle attachment, suction nozzle, cleaning device hose and cleaning device

[0002] The invention relates to a nozzle attachment for a handpiece of a cleaning device, in particular for a handpiece of a spray extraction device or a steam cleaner, wherein the nozzle attachment comprises a nozzle suction channel and a nozzle fluid channel fluidically separated therefrom, wherein the nozzle fluid channel comprises at least one fluid outlet on the distal side for dispensing a cleaning fluid, wherein the nozzle suction channel comprises at least one suction channel inlet on the distal side for receiving a dirty water solution and wherein the nozzle attachment comprises at least one cleaning element which is arranged or formed on a carrier element.

[0003] Furthermore, the invention relates to a suction nozzle for a cleaning device, in particular for a spray extraction device or a steam cleaner, which suction nozzle comprises a handpiece and a nozzle attachment.

[0004] Furthermore, the invention relates to a cleaning device hose for a cleaning device, in particular for a spray extraction device or a steam cleaner, wherein the cleaning device hose comprises a hose suction channel with a first and a second hose suction channel end and a hose fluid channel with a first and a second hose fluid channel end, wherein the first hose suction channel end and the first hose fluid channel end are connected or connectable to a handpiece of a suction nozzle.

[0005] Furthermore, the invention relates to a cleaning device, in particular in the form of a spray extraction device or a steam cleaner, comprising a suction device, a conveying device, a suction connection and a cleaning fluid connection, wherein the suction device is fluidly connected to the suction connection and wherein the conveying device is fluidly connected to the cleaning fluid connection, wherein the cleaning device further comprises a cleaning device hose connected or connectable to both the suction connection and the cleaning fluid connection.

[0006] Nozzle attachments, suction nozzles, cleaning hoses, and cleaning devices of the type described above are known, for example, from the unpublished German patent application 10 2023 114 139.2. The nozzle attachments described therein can also be used to clean small objects made of textile material, such as shoes.

[0007] However, the familiar nozzle attachments are complex to manufacture. Their installation, in particular, requires a technician with considerable technical skill.

[0008] It is therefore an object of the present invention to improve a nozzle attachment, a suction nozzle, a cleaning hose and a cleaning device of the type described above in such a way that they can be produced in a simple manner.

[0009] This object is achieved according to the invention in a nozzle attachment of the type described above in that the at least one fluid outlet is arranged or formed on the carrier element.

[0010] Such a configuration makes it possible, in particular, to easily mount the nozzle attachment, particularly on a handpiece. The nozzle attachment comprises, as described, a carrier element on which not only the at least one cleaning element is arranged or formed, but also the at least one fluid outlet. In this way, the nozzle attachment can be mounted quickly and without any particular manual skill, because assembly is significantly simplified by the fact that the carrier element comprises not only the at least one cleaning element, but also the at least one fluid outlet. In this way, in particular, a nozzle part is designed as an assembly unit, which can be connected to optional further components of the nozzle attachment to form the latter.In particular, all of the described components, in particular the support element, the at least one cleaning element, and the at least one fluid outlet, can be formed integrally, in particular monolithically. A one-piece or single-part design of such a unit can be achieved simply and with high precision by injection molding, in particular two-component injection molding.

[0011] Preferably, the at least one fluid outlet and the support element are formed integrally. In particular, they can be monolithic. Such a configuration eliminates the need to mount the at least one fluid outlet, for example, in the form of a nozzle, on the support element or another component of the nozzle attachment.

[0012] Depending on the application, the nozzle attachment can have one fluid outlet, two, three, or more. Depending on their design and number, the surface to be cleaned can be optimally wetted with a cleaning fluid.

[0013] It is advantageous if the nozzle suction channel defines a nozzle suction channel longitudinal axis and if the nozzle attachment is mirror-symmetrical or substantially mirror-symmetrical with respect to at least one mirror plane containing the nozzle suction channel longitudinal axis. Such a configuration simplifies the design of the nozzle attachment. In particular, the nozzle attachment can be mirror-symmetrical with respect to two mutually perpendicular mirror planes.

[0014] A cleaning fluid can be applied in a targeted manner if the at least one fluid outlet is designed in the form of a nozzle. In particular, it can be designed in the form of a point jet nozzle for generating a point jet or in the form of a cone jet nozzle for generating a cone jet. Furthermore, it can be advantageous if the nozzle is designed in the form of a fan nozzle for generating a fan jet. For example, a cleaning element designed in the form of a row of bristles can be precisely supplied with a cleaning fluid in this way.

[0015] It is advantageous if the nozzle is held on the support element in a force-fitting and / or form-fitting and / or material-fitting manner. This makes it possible, in particular, to design the nozzle attachment in such a way that the nozzle cannot be separated from the nozzle attachment as intended. In such a case, the nozzle can only be removed by destroying the nozzle attachment.

[0016] Advantageously, the nozzle is designed as a separate component and can be detachably connected to a distal end of the nozzle fluid channel. In particular, it can be designed to be screw-connected or latch-connected to the distal end of the nozzle fluid channel. Such a nozzle can be replaced if necessary. If it is connected to the distal end of the nozzle fluid channel by latching, for example, it can in particular be permanently connected to it. The nozzle fluid channel can in particular define a distal end on the support element.

[0017] According to a further preferred embodiment, it can be provided that the at least one fluid outlet is directed at least partially, in particular completely, toward the at least one cleaning element for wetting the at least one cleaning element with cleaning fluid. Such a configuration has the particular advantage that cleaning fluid can not only be applied directly to the surface to be cleaned, but that the surface to be cleaned can also be wetted with the at least one cleaning element. This allows for particularly effective and gentle removal of soiling from a surface to be cleaned.

[0018] It is advantageous if the at least one cleaning element defines a cleaning element longitudinal axis or a cleaning element plane, if the at least one fluid outlet is designed to generate a cleaning fluid jet that defines a jet axis or a jet plane, and if the jet axis or the jet plane, on the one hand, and the cleaning element longitudinal axis or the cleaning element plane, on the other hand, enclose an angle of inclination. Such a configuration makes it possible, in particular, to wet the at least one cleaning element with a cleaning fluid emerging from the at least one fluid outlet. Depending on the orientation of the angle of inclination, a cleaning fluid jet can also be directed away from the at least one cleaning element.

[0019] Preferably, the angle of inclination has a value in a range from approximately 0° to approximately 30°. Depending on the length of the at least one cleaning element, a cleaning fluid jet can be directed toward or away from the element.

[0020] In order to avoid an undefined application of cleaning fluid to a surface to be cleaned, it is advantageous if the nozzle attachment comprises a sealing element which projects in the distal direction and delimits the suction channel inlet. If the at least one fluid outlet is arranged or formed in an area surrounded by the sealing element, i.e. therefore in the area of ​​the suction channel inlet, an undesired lateral application of cleaning fluid to a surface to be cleaned outside the sealing element can be effectively prevented. If the sealing element is placed on the surface to be cleaned, cleaning fluid can only be applied to the surface to be cleaned in the area surrounded by the sealing element. If the sealing element delimits the suction channel inlet as described, the applied cleaning fluid can also be sucked away immediately again through the suction channel inlet and thus within the area delimited by the sealing element.

[0021] Advantageously, the at least one cleaning element protrudes beyond the sealing element on the distal side and in the distal direction. This allows, in particular, the cleaning element to come into contact with the surface to be cleaned before the sealing element touches the surface to be cleaned. The proposed design is particularly advantageous for cleaning recesses in surfaces, such as joints or profiles on shoes, since it reduces the wear on the sealing element.

[0022] To enable optimal adaptation of the sealing element even to curved surfaces, it is advantageous if it is designed to be deformable. In particular, it can be designed to be flexible and / or elastically deformable.

[0023] A good seal between the nozzle attachment and the surface to be cleaned can be achieved, for example, by designing the sealing element in the form of a sealing lip. A sealing lip is usually sufficiently thin so that it can be easily deformed to adapt to the contours of the surface to be cleaned. Especially with curved surfaces, such as those found on shoes, this allows for optimal cleaning results without soiling the area surrounding the object to be cleaned or exposing it to cleaning fluid.

[0024] It is advantageous if the sealing element is sleeve-shaped and extends parallel or substantially parallel to a nozzle suction channel longitudinal axis of the nozzle attachment. In particular, it can extend concentrically to the nozzle suction channel longitudinal axis. Such a sealing element can, in particular, seal an enclosed area when the nozzle attachment with the sealing element is held against a surface to be cleaned.

[0025] For handling the nozzle attachment, it is advantageous if the sealing element is arranged or formed on a sealing element carrier. For example, such a sealing element carrier can be designed so that it can be permanently or temporarily detachably connected to a handpiece. This allows, for example, sealing elements to be exchanged depending on the cleaning task. If a large surface area is required for processing, a sealing element carrier with a sealing element that surrounds a large surface area can be used. For small, delicate surfaces, a corresponding sealing element that surrounds only a small surface area can be used.

[0026] The sealing element carrier is preferably sleeve-shaped. This makes it possible, in particular, to simultaneously use the sealing element carrier as part of the nozzle suction channel. In other words, the sealing element carrier can also delimit the nozzle suction channel, at least in sections.

[0027] It is advantageous if the sealing element is arranged or configured to protrude beyond a distal end of the sealing element carrier on the distal side. This makes it possible, in particular, to design the sealing element carrier to be dimensionally stable, thus enabling safe handling of the sealing element. For example, it can be designed to be detachably connectable to an adapter element, which will be described in more detail below, or to the carrier element.

[0028] Preferably, the sealing element is connected to the sealing element carrier by force-fitting, form-fitting, and / or material-fitting means. Thus, it can be permanently and preferably permanently connected to the sealing element carrier. In particular, it can be designed in such a way that it can only be removed from the sealing element carrier by destruction.

[0029] The nozzle attachment can be easily formed if the sealing element is molded onto the sealing element carrier.

[0030] For handling of the nozzle attachment, it is advantageous if the sealing element carrier is dimensionally stable or essentially dimensionally stable.

[0031] In order to prevent cleaning fluid from escaping laterally in the area of ​​a surface to be cleaned, it is advantageous if the sealing element forms a closed boundary of the suction channel inlet. In this way, an area on a surface to be cleaned that corresponds to a cross-section of the suction channel inlet can be optimally sealed by the sealing element. It is advantageous if the sealing element defines a sealing element edge on the distal side, if the at least one cleaning element defines a cleaning element end on the distal side, and if the cleaning element end protrudes beyond the sealing element edge on the distal side. As already mentioned above, it is thus particularly possible for the at least one cleaning element to come into contact with a surface to be cleaned before the sealing element edge, in particular the entire sealing element edge, can come into contact with the surface to be cleaned.A user can thus deform the at least one cleaning element for cleaning, in particular to apply a cleaning force, for example in the case of a brush- or bristle-like cleaning element, and at the same time seal the surface to be cleaned with the sealing element.

[0032] Advantageously, the sealing element edge defines an edge plane. This design makes it particularly possible to clean a flat surface with the nozzle attachment.

[0033] It is advantageous if the edge plane runs transversely to the nozzle suction channel's longitudinal axis. In particular, it can form an angle with the latter in a range between 0° and approximately 90°. Thus, the edge plane can run perpendicular to the nozzle suction channel's longitudinal axis. In particularly advantageous configurations of nozzle attachments, for example, when the at least one cleaning element is designed in the form of a scraper, the edge plane runs transversely, in particular at an angle in a range between 30° and 60°, to the nozzle suction channel's longitudinal axis.

[0034] It is advantageous if the shape of the sealing element is constant over a sealing element section, starting from the sealing element edge in the direction of the sealing element carrier. In this way, a region can be formed whose shape corresponds to the suction channel inlet and which extends over a length of the sealing element section. In particular, the shape of the sealing element can also be adapted to the shape of the at least one cleaning element.

[0035] It is advantageous if the sealing element has a constant cross-section starting from the sealing element carrier. This allows the entire cross-section provided by the sealing element carrier to be used to form the suction channel inlet.

[0036] It is advantageous if the sealing element has a decreasing cross-section starting from the sealing element carrier. Such a configuration can be particularly advantageous if the at least one cleaning element is very small compared to the cross-section of the sealing element carrier. In such a case, it can be advantageous if the suction channel inlet defined by the sealing element is also correspondingly small. This can be achieved by reducing the cross-section of the sealing element starting from the sealing element carrier towards the sealing element edge.

[0037] Preferably, a cross-section defined by the sealing element carrier decreases toward the sealing element edge. This configuration makes it possible, in particular, to design the nozzle attachment to be dimensionally stable even in the area of ​​the sealing element carrier, where it has a decreasing cross-section. For example, the sealing element can then have a constant cross-section and a correspondingly consistent shape from a distal end of the sealing element carrier to the sealing element edge.

[0038] It is advantageous if a distal end of the sealing element carrier defines an end contour and if the end contour corresponds or substantially corresponds to a shape of the sealing element edge. Such a configuration makes it possible, in particular, to form a sealing element section with a constant cross-section, starting from the distal end of the sealing element carrier and extending all the way to the sealing element edge. With a dimensionally stable sealing element carrier, the sealing element can then only deform in the area from the distal end of the sealing element carrier to the sealing element edge. This can improve the handling of the nozzle attachment.

[0039] Preferably, the cross-sectional shape of the sealing element changes from the sealing element carrier toward the sealing element edge. Such a configuration is particularly advantageous when particularly small surface areas need to be cleaned.

[0040] Advantageously, the sealing element carrier has a circular cross-section at an end facing away from the sealing element. Such a sealing element carrier can then be coupled, for example, in different orientations to a handpiece or a cleaning device hose. This can be achieved, for example, via a bayonet connection device with several bayonet coupling elements distributed around a circumference. This allows for a simple and secure connection between the sealing element carrier and a handpiece or an adapter part that can be coupled to the handpiece.

[0041] It is advantageous if the sealing element has a free sealing element length starting from a distal end of the sealing element carrier parallel to the nozzle suction channel longitudinal axis, if the at least one cleaning element has a free cleaning element length starting from a distal end of the carrier element parallel to the nozzle suction channel longitudinal axis, and if the cleaning element length is greater than the sealing element length. Such a configuration makes it possible, in particular, for the at least one cleaning element to protrude beyond the sealing element, in particular a sealing element edge thereof, on the distal side. As already explained, the at least one cleaning element can thus come into contact with a surface to be cleaned before the sealing element touches it.According to a further preferred embodiment, it can be provided that the nozzle attachment is designed in several parts and comprises an adapter part for connection to a handpiece, a nozzle part, and a sealing part, and that the nozzle part, the sealing part, and the adapter part are designed to be detachably connectable to one another. Such a nozzle attachment makes it possible, in particular, to be connected to different handpieces. For this purpose, for example, the sealing part and the nozzle part can be retained. Only an adapter part adapted for a different handpiece is required. Furthermore, such a design also enables the formation of a set of nozzle attachments, wherein several adapter parts, several nozzle parts, and several sealing parts can be provided, which can then basically be connected to one another in any desired and freely selectable way. In this way, optimal nozzle attachments for individual cleaning purposes can be formed by combining the aforementioned parts.

[0042] It is advantageous if the nozzle part defines a nozzle part fluid channel that is fluidly connected to the at least one fluid outlet, and if the sealing part defines a sealing part suction channel that is fluidly connected to the suction channel inlet. This configuration makes it possible, in particular, to conduct a cleaning fluid through the nozzle part fluid channel to the at least one fluid outlet and to convey a dirty water solution through the suction channel inlet and the sealing part suction channel to a handpiece and from a handpiece to a cleaning device, for example, by means of a cleaning device hose.

[0043] Preferably, the nozzle part and the sealing part are designed to be detachably connectable to one another. They can then be selectively connected to one another and combined in various configurations to form a nozzle attachment. They can then be handled together, for example, for connection to a handpiece or an adapter part.

[0044] Advantageously, the nozzle part and the adapter part are designed to be detachably connected to one another. This makes it possible, in particular, to detach the nozzle part from the adapter part and replace it with another nozzle part. It is also possible to couple the same nozzle part with different adapter parts, for example, if the nozzle part is to be used in conjunction with different cleaning devices.

[0045] The nozzle attachment can be designed to be particularly compact if the nozzle part encompasses the carrier element.

[0046] Preferably, the sealing part comprises the sealing element. In particular, the sealing part can also comprise the sealing element carrier and the sealing element. This allows a compact design of the nozzle attachment to be achieved.

[0047] It is advantageous if the nozzle attachment comprises a first coupling device for detachably connecting the nozzle part and the adapter part. With such a first coupling device, the nozzle part and the adapter part can be connected to each other and separated again.

[0048] The nozzle part and the adapter part can be connected to one another and separated again in a simple manner if the first coupling device comprises first and second coupling elements which are arranged or formed on the one hand on the nozzle part and on the other hand on the adapter part, and if the first and second coupling elements are engaged in a force-locking and / or form-locking manner in a coupling position and are disengaged in a separation position.

[0049] The nozzle attachment can be easily handled if the first coupling device is designed in the form of a first bayonet connection device. For example, the nozzle part can be placed on the adapter part in a direction parallel to the nozzle suction channel's longitudinal axis and then connected to the adapter part in a known manner by a rotational movement about the nozzle suction channel's longitudinal axis. In particular, the nozzle part and adapter part can be clamped relative to each other in an end position.

[0050] It is advantageous if the sealing part and the adapter part are designed to be detachably connected to each other. This makes it possible, in particular, to detach the sealing part from the adapter part and replace it with another sealing part, depending on the cleaning task.

[0051] The sealing part and the adapter part can be detachably connected to one another in a simple manner if the nozzle attachment comprises a second coupling device for detachably connecting the sealing part and the adapter part to one another.

[0052] The nozzle attachment can be formed in a simple manner if the second coupling device comprises third and fourth coupling elements which are arranged or formed on the one hand on the nozzle part and on the other hand on the adapter part, and if the third and fourth coupling elements are engaged in a force-locking and / or form-locking manner in a coupling position and are disengaged in a separation position.

[0053] For handling the nozzle attachment, it is advantageous if the second coupling device is designed in the form of a second bayonet connection device. Such a second bayonet connection device then enables, in particular, similar to the first bayonet connection device, a simple coupling of the sealing part and the adapter part to one another. This is done by moving them toward one another in a direction parallel to the nozzle suction channel's longitudinal axis and then rotating them relative to one another by moving them around the nozzle suction channel's longitudinal axis. Bayonet connections have the particular advantage that they can be used for optimal securing in a direction parallel to the longitudinal axis they define.Separation of the engaging coupling elements of the bayonet connection device is only possible if a relative rotational movement of the engaging coupling elements around the longitudinal axis of the bayonet connection device first occurs.

[0054] It is advantageous if the adapter part comprises a first adapter part end and a second adapter part end, and if the first adapter part end is detachably connectable to a handpiece, and if the second adapter part end is detachably connectable to the nozzle part and / or the sealing part. By providing appropriate adapter parts, it is particularly possible to couple nozzle parts and sealing parts to different handpieces. For this purpose, only different adapter parts need to be provided.

[0055] It is advantageous if the first adapter part end defines a first adapter part longitudinal axis, if the second adapter part end defines a second adapter part longitudinal axis, and if the first adapter part longitudinal axis and the second adapter part longitudinal axis enclose an adapter part angle that has a value in a range from 180° to approximately 90°. In particular, the adapter part angle can have a value of approximately 135°. An adapter part angle of 180° corresponds to a rectilinearly extending adapter part. An adapter part angle of approximately 135° corresponds to an angled portion with a corresponding interior angle between the two adapter part ends.

[0056] It is advantageous if the adapter part defines an adapter part suction channel and an adapter part fluid channel, which are fluidly separated from one another, and if the adapter part fluid channel is fluidly connected to the nozzle part fluid channel in the first coupling position and if the adapter part suction channel is fluidly connected to the sealing part suction channel in the second coupling position. Such a configuration makes it possible, in particular, to convey a cleaning fluid through the adapter part to the at least one fluid outlet, fluidly separated from the suction flow taken up by the suction channel inlet. Depending on the cleaning task to be solved, it is advantageous if the sealing element edge delimits the suction channel inlet and is oval, circular, polygonal, in particular triangular, square or pentagonal. A contour or shape of the sealing element edge can, in particular, be adapted to a shape or contour of the at least one cleaning element.For example, the distance between the sealing element edge and the at least one cleaning element can be the same on all sides, for example, in a plane perpendicular to the nozzle channel's longitudinal axis. This allows a contour of the sealing element edge to be specified that is geometrically similar to the at least one cleaning element.

[0057] In order to achieve sufficient stability of the nozzle attachment, it is advantageous if the carrier element is dimensionally stable or essentially dimensionally stable.

[0058] According to a further preferred embodiment, it can be provided that a suction channel inlet contour of the suction channel inlet is geometrically similar to a cleaning element contour defined by the at least one cleaning element. As already explained, this makes it possible, in particular, to form a suction region that is delimited on the one hand by the sealing element and on the other hand by the at least one cleaning element, and has a constant distance between the at least one cleaning element and the sealing element.

[0059] Preferably, the at least one cleaning element is designed to be permeable to fluid. This enables, in particular, the at least one cleaning element to be moistened with cleaning fluid. This can improve the cleaning of a surface because the at least one cleaning element can be moved over it while moist in order to loosen dirt and remove it by mechanical processing. It is advantageous if the at least one cleaning element is designed to be closed in a ring shape and surrounds the fluid outlet. This can in particular ensure that the at least one cleaning element delimits a fluid outlet region. For example, the at least one cleaning element can also separate a suction region of the nozzle attachment from the fluid outlet region in this way.

[0060] For example, for cleaning smooth and rough surfaces, it is advantageous if the at least one cleaning element is designed like a brush and comprises a plurality of bristles and / or bristle bundles.

[0061] Preferably, the at least one cleaning element is designed in the form of a ring brush with at least one closed, annular bristle ring. The ring brush can also comprise two, three, or more bristle rings. This allows large surface areas to be mechanically treated.

[0062] It is advantageous if the at least one cleaning element is designed in the form of a joint brush with a row of bristles comprising several bristles. Such a row of bristles can be used in particular for cleaning straight joints.

[0063] In order to clean soiling on smooth surfaces in particular, it is advantageous if the at least one cleaning element is designed in the form of a scraping element with a scraping edge pointing in the distal direction. For example, a nozzle attachment designed in this way can be used to clean glass surfaces, for example also in the form of glass ceramic hobs, in particular to remove burnt-on food residue. The scraping element can in particular be designed in the form of a scraper with a sharp edge or blade. Preferably, the carrier element is sleeve-shaped and comprises a carrier element fluid channel that is fluidly connected to the at least one fluid outlet. In this way, cleaning fluid can be conducted through the carrier element to the at least one fluid outlet.

[0064] For an optimal cleaning result, it is favorable if the fluid outlet defines a free fluid outlet cross-section, if the suction channel inlet defines a free suction channel inlet cross-section and if a ratio of cross-sectional areas defined by the fluid outlet cross-section and the suction channel inlet cross-section is in a range from approximately 1 / 100 to approximately 1 / 20, in particular in a range from approximately 1 / 100 to approximately 1 / 50.

[0065] It is advantageous if the at least one cleaning element has a cleaning element end surface on the distal side, and if the cleaning element end surface defines an end surface plane that runs transversely, in particular perpendicularly, to a nozzle suction channel longitudinal axis of the nozzle attachment. This allows the nozzle attachment with the at least one cleaning element to be placed flatly on a flat surface to be cleaned.

[0066] Preferably, the cleaning element end surface is defined by distally facing end surfaces of the free ends of the plurality of bristles. These can, in particular, be flat and define a plane. This allows a flat surface to be cleaned effectively.

[0067] It is advantageous if the edge plane and the end face plane run parallel to each other, and if the end face plane runs distally of the edge plane. In particular, it is possible for the at least one cleaning element to protrude beyond a free end of the sealing element on the distal side.

[0068] It is advantageous if the edge plane and the end surface plane are spaced apart from one another, and if the spacing has a value in a range of approximately 0.5 mm to approximately 3 mm. In particular, the spacing can have a value of approximately 1 mm. This ensures, in particular, a sufficient projection of a distal end of the at least one cleaning element beyond the edge plane.

[0069] The nozzle attachment can be formed simply and cost-effectively if the nozzle attachment, in particular the at least one cleaning element and / or the at least one fluid outlet and / or the support element and / or the sealing element, is made of a plastic. In particular, all parts of the nozzle attachment can be formed by injection molding.

[0070] The object stated at the outset is further achieved according to the invention in a suction nozzle of the type described at the outset in that the nozzle attachment is designed in the form of one of the nozzle attachments described above.

[0071] Equipping the suction nozzle with such a nozzle attachment then has, in particular, the advantages described above in connection with preferred embodiments of nozzle attachments.

[0072] It is advantageous if the handpiece and nozzle attachment are designed to be detachably connected to each other. This allows the handpiece to be coupled with different nozzle attachments, depending on the cleaning task to be solved.

[0073] Furthermore, it is advantageous if the handpiece and the adapter part are designed to be detachably connectable to one another. As already mentioned, the nozzle part and / or the sealing part can be coupled to different handpieces via different adapter parts.

[0074] The object stated above is further achieved according to the invention in a cleaning device hose of the type described above in that the suction nozzle is designed in the form of one of the advantageous suction nozzles described above. A cleaning device hose thus equipped then also has the advantages already described above in connection with preferred embodiments of suction nozzles.

[0075] It is advantageous if the second hose suction channel end is or can be fluidly connected to a suction connection of the cleaning device, and if the second hose fluid channel end is or can be fluidly connected to a fluid connection of the cleaning device. This makes it possible, in particular, to convey a cleaning fluid from the cleaning device to the nozzle attachment via the cleaning device hose and also to suck up a dirty water solution with the nozzle attachment and to convey it to the cleaning device through the cleaning device hose.

[0076] The object stated at the outset is further achieved according to the invention in a cleaning device of the type described at the outset in that the cleaning device hose is designed in the form of one of the cleaning device hoses described above.

[0077] The cleaning device then has the advantages already described above in connection with preferred embodiments of cleaning device hoses.

[0078] It is advantageous if the cleaning device comprises a control device for controlling the conveying device to activate and deactivate a fluid discharge. One embodiment, in particular, makes it possible to discharge a cleaning fluid through the at least one fluid outlet onto a surface to be cleaned only when this is actually desired.

[0079] The following description of preferred embodiments of the invention serves to explain it in more detail in conjunction with the drawings. They show: Figure 1: a schematic perspective, partially broken overall view of an embodiment of a cleaning device;

[0080] Figure 2: a schematic representation of an embodiment of a cleaning device;

[0081] Figure 3: a schematic representation of part of a cleaning device hose with suction nozzle when cleaning a shoe;

[0082] Figure 4: a perspective arrangement of the handpiece from Figure 3 with the nozzle attachment removed;

[0083] Figure 5: a sectional view along line 5-5 in Figure 4;

[0084] Figure 6: an enlarged partial view of the arrangement of Figure 5;

[0085] Figure 7: an enlarged perspective view of an embodiment of a nozzle attachment;

[0086] Figure 8: another perspective view of the arrangement of Figure 7;

[0087] Figure 9: an exploded view of the arrangement of Figure 7;

[0088] Figure 10: a partially exploded view of the arrangement from Figure 9 on the right;

[0089] Figure 11: a longitudinal sectional view of the arrangement of Figure 7;

[0090] Figure 12: a sectional view perpendicular to the sectional view of Figure 11;

[0091] Figure 13: an enlarged view of a support element shown on the left in Figure 10; Figure 14: a sectional view along line 14-14 in Figure 13;

[0092] Figure 15: a longitudinal sectional view of the arrangement of Figure 7;

[0093] Figure 16: a sectional view taken along line 16-16 in Figure 11;

[0094] Figure 17: a sectional view taken along line 17-17 in Figure 11;

[0095] Figure 18: a perspective schematic representation of another embodiment of a nozzle attachment;

[0096] Figure 19: another perspective view of the arrangement of Figure 18;

[0097] Figure 20: a longitudinal sectional view of the arrangement of Figure 18;

[0098] Figure 21: a sectional view of the arrangement of Figure 18 in a plane perpendicular to the sectional view of Figure 20;

[0099] Figure 22: a perspective view of the support element of the arrangement of Figure 18;

[0100] Figure 23: a sectional view taken along line 23-23 in Figure 22;

[0101] Figure 24: a perspective schematic representation of another embodiment of a nozzle attachment;

[0102] Figure 25: another perspective view of the arrangement of Figure 24;

[0103] Figure 26: a longitudinal sectional view of the arrangement of Figure 24;

[0104] Figure 27: a perspective view of a support element of the assembly of Figure 24 from the front; Figure 28: a sectional view along line 28-28 in Figure 27;

[0105] Figure 29: a perspective schematic view of another embodiment of a nozzle attachment;

[0106] Figure 30: another perspective view of the arrangement of Figure 29;

[0107] Figure 31: a longitudinal sectional view of the arrangement of Figure 29;

[0108] Figure 32: a perspective view of a support element of the arrangement of Figure 29 from the front;

[0109] Figure 33: a sectional view taken along line 33-33 in Figure 32;

[0110] Figure 34: a sectional view taken along line 34-34 in Figure 32;

[0111] Figure 35: a perspective schematic representation of another embodiment of a nozzle attachment;

[0112] Figure 36: another perspective view of the arrangement of Figure 35;

[0113] Figure 37: a longitudinal sectional view of the arrangement of Figure 35;

[0114] Figure 38: a front view of a support element of the arrangement of Figure 35;

[0115] Figure 39: a sectional view taken along line 39-39 in Figure 38;

[0116] Figure 40: a perspective schematic representation of another embodiment of a nozzle attachment;

[0117] Figure 41: another perspective view of the arrangement of Figure 40; Figure 42: a longitudinal sectional view of the arrangement of Figure 40;

[0118] Figure 43: a perspective view of a support element of the arrangement of Figure 40 from the front;

[0119] Figure 44: a sectional view taken along line 44-44 in Figure 43;

[0120] Figure 45: a perspective schematic view similar to the view of the arrangement in Figure 3 of a further embodiment of a cleaning hose with an alternative handpiece;

[0121] Figure 46: a sectional view taken along line 46-46 in Figure 45;

[0122] Figure 47: a perspective view of the nozzle attachment of the arrangement of Figure 45;

[0123] Figure 48: a longitudinal sectional view of the arrangement of Figure 47;

[0124] Figure 49: a perspective view of another embodiment of a nozzle attachment;

[0125] Figure 50: a longitudinal sectional view of the arrangement of Figure 49;

[0126] Figure 51: a perspective view of another embodiment of a nozzle attachment;

[0127] Figure 52: a longitudinal sectional view of the arrangement of Figure 51;

[0128] Figure 53: a perspective view of another embodiment of a nozzle attachment;

[0129] Figure 54: a longitudinal sectional view of the arrangement of Figure 53; Figure 55: a perspective view of another embodiment of a nozzle attachment;

[0130] Figure 56: a longitudinal sectional view of the arrangement of Figure 55;

[0131] Figure 57: a perspective view of another embodiment of a nozzle attachment; and

[0132] Figure 58: a longitudinal sectional view of the arrangement of Figure 57.

[0133] Figure 1 schematically illustrates an embodiment of a cleaning device, designated overall by reference numeral 10. It is designed in the form of a spray extraction device 12.

[0134] The structure of the cleaning device 10 from Figure 1 is shown schematically in Figure 27.

[0135] A suction device 16 and a conveying device 18 are arranged in a housing 14 of the cleaning device 10. The suction device 16 is fluidly connected to a suction connection 20 on the housing 14. The conveying device 18 is fluidly connected to a cleaning fluid connection 22 on the housing 14. A cleaning fluid container 24 is arranged in the housing 14 and is designed to hold a cleaning fluid, for example, water. The cleaning fluid container 24 is fluidly connected to the conveying device 18 in a manner not shown, so that cleaning fluid can be conveyed from the cleaning fluid container 24 to the cleaning fluid connection 22 by means of the conveying device 18.

[0136] The housing 14 also accommodates a dirty water container 26, which is fluidly connected to the suction device 16. The suction device 16 is designed to convey a dirty water container from the suction connection 20 into the dirty water container 26. The cleaning device 10 further comprises a cleaning device hose 28, which is connected or connectable to both the suction connection 20 and the cleaning fluid connection 22.

[0137] The cleaning device hose 28 comprises a hose suction channel 30 with a first hose suction channel end 32 and a second hose suction channel end 34. The cleaning device hose 28 further comprises a hose fluid channel 36 with a first hose fluid channel end 38 and a second hose fluid channel end 40.

[0138] The cleaning device hose 28 comprises an outer suction hose 42, which surrounds or defines the hose suction channel 30. The hose fluid channel 36 is defined by a fluid hose 44, which is guided through the suction hose 42 and thus through the hose suction channel 30.

[0139] The cleaning device 10 further comprises a suction nozzle 46 with a handpiece 48 and a nozzle attachment 50.

[0140] A valve device 52 is arranged on the handpiece 48 for opening or closing a handpiece fluid channel 54, which extends through the handpiece 48. A handpiece suction channel 56 also extends through the handpiece 48. A proximal end of the handpiece fluid channel 54 is fluidly connected or connectable to the first hose fluid channel end 38. A proximal end of the handpiece suction channel 56 is connected or connectable to the first hose suction channel end 32.

[0141] The handpiece 48 and the nozzle attachment 50 are optionally permanently connected to one another or, alternatively, are designed to be detachably connected. In some embodiments, the nozzle attachment 50 is arranged or designed to be either rotatable or non-rotatable on the handpiece 48.

[0142] The cleaning device hose 28 is designed such that the second hose suction channel end 34 is fluidly connectable or connected to the suction connection 20 of the cleaning device and that the second hose fluid channel end 40 is fluidly connectable or connected to the cleaning fluid connection 22 of the cleaning device 10.

[0143] The cleaning device 10, shown schematically in Figure 1, can be operated independently of the mains. A rechargeable battery 58 is provided for this purpose. It serves to supply all electrical components of the cleaning device 10 with electrical energy. Alternatively or additionally, a mains connection device can also be provided.

[0144] Figure 3 shows the handpiece 48 of the cleaning device 10 shown schematically in Figure 1 with the nozzle attachment 50 attached during cleaning of a

[0145] Shoe 60. In Figures 3 to 6 as well as in all other figures, the reference numerals used in connection with Figures 1 and 2 are used to designate identical and functionally comparable components.

[0146] The nozzle attachment 50 comprises an adapter part 62 for connecting to the handpiece 48, a sealing part 64, and a nozzle part 66. Thus, the nozzle attachment 50 is constructed in several parts. In the described embodiment, the nozzle part 66 and the sealing part 64 are each designed to be detachably connected directly to the adapter part 62.

[0147] The handpiece 48 comprises an actuating device 68 for activating or deactivating the conveying device 18 in order to convey a cleaning fluid through the fluid hose 44 to the handpiece 48. The adapter part 62 can be fluidly coupled to a distal end of the handpiece 48 via a connecting device 70. The adapter part 62 comprises an adapter part suction channel 72 and an adapter part fluid channel 74, which are fluidly connected on the one hand to the handpiece suction channel 56 and on the other hand to the handpiece fluid channel 54 in a connecting position, as schematically illustrated in Figures 3, 5, and 6. The adapter part suction channel 72 and the adapter part fluid channel 74 are fluidly separated from one another.

[0148] The adapter part 62 has a first adapter part end 76 and a second adapter part end 78. The first adapter part end 76 is detachably connectable to the handpiece 48. The second adapter part end 78 is detachably connectable to the nozzle part 66 and the sealing part 64.

[0149] The first adapter part end 76 defines a first adapter part longitudinal axis 80. The second adapter part end 78 defines a second adapter part longitudinal axis 82. The first adapter part longitudinal axis 80 and the second adapter part longitudinal axis 82 enclose an adapter part angle 84. This has a value in a range from 180° to approximately 90°. In the embodiment illustrated in Figures 5 and 6, the value of the adapter part angle 84 is 180°. Thus, the adapter part longitudinal axes 80 and 82 coincide.

[0150] The structure of the nozzle attachment 50 is explained in more detail below in connection with Figures 7 to 17.

[0151] Figure 9 shows an example of the adapter part 62, which is coupled to the nozzle part 66.

[0152] The sealing part 64 is shown in an exploded view in Figure 9. It comprises a sealing element carrier 86, on which a sealing element 88 is arranged or formed. The sealing element 88 is formed from a soft plastic material and is connected to the sealing element carrier 86 in a force-fitting and / or form-fitting and / or material-fitting manner. In the exemplary embodiment illustrated in the figures, the sealing element 88 is injection-molded onto the sealing element carrier 86.

[0153] The sealing element carrier 86 is dimensionally stable. Furthermore, the sealing element carrier 86 is sleeve-shaped.

[0154] The nozzle attachment 50 comprises a nozzle suction channel 90 and a nozzle fluid channel 92 fluidly separated therefrom. The nozzle fluid channel 92 is fluidly connected to the adapter partial fluid channel 74. The nozzle suction channel 90 is fluidly connected to the adapter partial suction channel 72.

[0155] The nozzle fluid channel 92 is fluidly connected to two fluid outlets 94 on the distal side. It serves to discharge the cleaning fluid. On the distal side, the nozzle suction channel 90 defines a suction channel inlet 96 for receiving a dirty water solution.

[0156] Furthermore, a cleaning element 98 is arranged or formed on the nozzle attachment 50, specifically on a carrier element 100. Furthermore, the two fluid outlets 94 are also arranged or formed on the carrier element 100.

[0157] A distal end of the adapter partial fluid channel 74 is sealed relative to the carrier element 100 and thus also to the nozzle 118 via a sealing element in the form of an annular seal 208.

[0158] The two fluid outlets 94 and the support element 100 are formed in one piece, namely monolithic.

[0159] The cleaning element 98 is designed like a brush and comprises a plurality of bristles 102, which are received as bristle bundles 104 in recesses 106 provided for this purpose in the carrier element 100.

[0160] In the embodiment of Figures 7 to 17, the cleaning element 98 is designed in the form of a crevice brush 108 and comprises a plurality of bristle bundles 104 arranged in a bristle row 110. The nozzle suction channel 90 defines a nozzle suction channel longitudinal axis 112. As can be clearly seen, in particular, in Figure 13, the nozzle attachment 50 is mirror-symmetrical or essentially mirror-symmetrical to two mutually perpendicular mirror planes 114 and 116 containing the nozzle suction channel longitudinal axis 112. The mirror plane 116 is aligned such that the bristle row 110 extends in the mirror plane 116. The mirror plane 114 extends perpendicular thereto.

[0161] The two fluid outlets 94 are designed as nozzles 118. In this embodiment, the nozzle 118 is designed as a fan nozzle 120. It can be used to generate a fan jet.

[0162] In the illustrated embodiment, the two fluid outlets 94 are partially directed towards the cleaning element 98 in order to be able to wet it with cleaning fluid.

[0163] In this embodiment, the cleaning element 98 defines a cleaning element plane 122. The fluid outlets 94 are designed to generate a cleaning fluid jet 124, as shown schematically and by way of example in Figure 11. It defines a jet plane 126, which encloses an angle of inclination 128 with the cleaning element plane 122. The angle of inclination 128 has a value in a range from approximately 0° to approximately 30°.

[0164] As already described, the sealing element 88 protrudes from the sealing element carrier 86 in the distal direction and delimits the suction channel inlet 96. The cleaning element 98 protrudes slightly beyond the sealing element 88 on the distal side and in the distal direction.

[0165] The sealing element 88 is designed to be deformable, specifically flexible or elastic. It is in the form of a sealing lip 130. As clearly visible in Figure 9, the sealing element 88 is sleeve-shaped and extends parallel to the nozzle suction channel longitudinal axis 112 of the nozzle attachment 50.

[0166] As can be clearly seen in Figure 11, the sealing element 88 is arranged or formed on the distal side so as to protrude beyond a distal end 134 of the sealing element carrier 86.

[0167] The sealing element 88 defines a self-contained boundary of the suction channel inlet 96.

[0168] The sealing element 88 defines a sealing element edge 136 on the distal side. The cleaning element 98 defines a cleaning element end 138 on the distal side. As can be seen particularly clearly in Figure 12, the cleaning element end 138 protrudes beyond the sealing element edge 136 on the distal side.

[0169] In the embodiment shown in the figures, the sealing element edge 136 defines an edge plane 140. The edge plane 140 extends transversely, namely perpendicularly, to the nozzle suction channel longitudinal axis 112.

[0170] The sealing element 88 has a constant cross-section starting from the distal end 134 of the sealing element carrier 86. The shape of the sealing element 88 is selected such that, starting from the sealing element edge 136 in the direction of the sealing element carrier 86, it remains constant over a sealing element section 142. The distal end 134 of the sealing element carrier 86 defines an end contour that corresponds or substantially corresponds to a shape of the sealing element edge 136.

[0171] The sealing element 88 initially has a constant cross-section in the distal direction, starting from a proximal end 144, but then reduces its cross-section toward the distal end 134 of the sealing element carrier 86. Thus, it also has a decreasing cross-section starting from the sealing element carrier 86. The sealing element carrier 86 has a maximum diameter at its proximal end 146, which then remains constant for almost approximately three-quarters of the length of the sealing element carrier 86 parallel to the nozzle suction channel longitudinal axis 112 and then decreases in cross-section toward the sealing element edge 136, specifically up to the distal end 134.

[0172] Furthermore, the cross-sectional shape of the sealing element 88 changes from the sealing element carrier 86 toward the sealing element edge 136. In the region of the proximal end 144, the cross-sectional shape of the sealing element 88 is circular. In the region of the sealing element edge 136, the cross-sectional shape of the sealing element 88 is elongated rectangular with rounded corners.

[0173] The sealing element carrier 86 has a circular cross-section at its proximal end 146. An inner diameter of the sealing element carrier 86 in the region of the proximal end 146 corresponds to an outer diameter of a distal end region 148 of the adapter part 62, so that the sealing part 64, as shown in particular in Figure 11, can be pushed onto the adapter part 62 in a direction parallel to the nozzle suction channel longitudinal axis 112 until it abuts against an annular surface 150 facing in the distal direction, which adjoins the distal end region 148 on the proximal side.

[0174] The sealing element 88 has a free sealing element length 152 parallel to the nozzle suction channel longitudinal axis 112, starting from the distal end 134 of the sealing element carrier 86. The cleaning element 98 has a free cleaning element length 156 parallel to the nozzle suction channel longitudinal axis 112, starting from a distal end 154 of the carrier element 100. In the illustrated embodiment, the cleaning element length 156 is greater than the sealing element length 152. The nozzle part 66 defines a nozzle part fluid channel 158, which is fluidly connected to the fluid outlets 94.

[0175] The sealing part 64 defines a sealing part suction channel 160 which is fluidly connected to the suction channel inlet 96.

[0176] The nozzle part 66 and the adapter part 62 are designed to be detachably connectable to one another.

[0177] The nozzle part 55 comprises the carrier element 100.

[0178] The sealing part 64 comprises the sealing element 88.

[0179] The nozzle attachment 50 comprises a first coupling device 162 for releasably connecting the nozzle part 66 and the adapter part 62 to one another. Figure 17 shows a sectional view through the first coupling device 162.

[0180] The first coupling device 162 comprises first and second coupling elements 164, 166, which are arranged or formed on the one hand on the nozzle part 66 and on the other hand on the adapter part 62. The first and second coupling elements 164, 166 are engaged with one another in a coupling position, as illustrated by way of example in Figure 15. In the separation position, schematically illustrated in Figure 10, they are disengaged.

[0181] The first coupling device 162 is designed in the form of a first bayonet connection device 168. The first coupling elements 164 are designed in the form of L-shaped recesses on an inner wall of the sleeve-shaped carrier element 100, starting from its proximal end. They have a first section open in the proximal direction parallel to the nozzle suction channel longitudinal axis 112 and a second section extending in the circumferential direction relative to the nozzle suction channel longitudinal axis 112. The second coupling elements 166 are designed in the form of projections projecting radially from the adapter part 62. Figure 17 shows the mounting position of the nozzle part 66 on the adapter part 62.For locking, i.e. for coupling in the coupling position, the adapter part 62 must then be rotated in the direction of the arrow 170 relative to the nozzle part 66, as shown by way of example in Figure 17, in order to insert the second coupling elements into the first coupling elements 164 in the circumferential direction.

[0182] The sealing part 64 and the adapter part 62 are also designed to be detachably connected to one another. For this purpose, the nozzle attachment 50 comprises a second coupling device 172 for detachably connecting them to one another.

[0183] The second coupling device 172 comprises third and fourth coupling elements 174, 176, which are arranged or formed on the one hand on the nozzle part 66 and on the other hand on the adapter part 62. The third and fourth coupling elements 174, 176 are also engaged in a force-locking and form-locking manner in a coupling position, which is schematically illustrated in Figure 16.

[0184] In the separation position shown schematically in Figure 9, the third and fourth coupling elements 174, 176 are disengaged.

[0185] The second coupling device 172 is designed in the form of a second bayonet connection device 178. The fourth coupling elements protrude from the distal end region 148 in the radial direction relative to the nozzle suction channel longitudinal axis 112 from the adapter part 62. The third coupling elements 174 are designed, analogously to the first coupling elements 164, in the form of L-shaped recesses in an inner wall of the circular end section of the sealing element carrier 86. Starting from the proximal end 146, a first section of the third coupling element 174 extends parallel to the nozzle suction channel longitudinal axis 112. Adjoining this first section is a short section extending in the circumferential direction relative to the nozzle suction channel longitudinal axis 112. As shown schematically in Figure 16, the two fourth coupling elements 176 in the form of projections projecting in the radial direction from the adapter part 62 engage in the circumferentially extending sections of the third coupling elements 174.

[0186] In the illustrated embodiment, a total of four third coupling elements 174 are provided, which are formed uniformly over a circumference relative to the nozzle suction channel longitudinal axis 112 on the sealing element carrier 86. Four first coupling elements 164 are formed on the nozzle part 66, namely on the carrier element 100.

[0187] As already explained, the sealing element edge 136 has a substantially quadrangular, namely rectangular, shape that delimits the suction channel inlet 96.

[0188] The carrier element 100, like the sealing element carrier 86, is dimensionally stable or essentially dimensionally stable. It is injection-molded from a plastic and formed monolithically.

[0189] As can be clearly seen in Figure 8, a suction channel inlet contour of the suction channel inlet 96 is geometrically similar to a cleaning element contour defined by the cleaning element 98.

[0190] The cleaning element 98 is designed to be fluid-permeable. Cleaning fluid can penetrate the bristles 102 or enter the spaces between the bristles 102 or the bristle bundles 104.

[0191] The carrier element 100 is, as can be clearly seen in Figure 16, sleeve-shaped and defines a carrier element fluid channel 180 which is fluidly connected to the fluid outlets 94.

[0192] The fluid outlets 94 define a free fluid outlet cross-section. The suction channel inlet 96 defines a free suction channel inlet cross-section. The ratio of the cross-sectional areas defined by the fluid outlet cross-section and the suction channel inlet cross-section is in a range from approximately 1 / 100 to approximately 1 / 20. In particular, they can be in a range from approximately 1 / 100 to approximately 1 / 50.

[0193] The cleaning element 98 has a cleaning element end surface 182 on the distal side. The cleaning element end surface 182 defines an end surface plane 184 that extends transversely, namely perpendicularly, to the nozzle suction channel longitudinal axis 112.

[0194] In the illustrated embodiment, the cleaning element end surface 182 is defined by the distally facing end surfaces of free ends of the plurality of bristles 102.

[0195] The edge plane 140 and the end surface plane 184 run parallel to each other, as shown by way of example in Figure 5. The end surface plane 184 runs distally of the edge plane 140.

[0196] The edge plane 140 and the end surface plane 184 are spaced apart by a distance 186 ranging from approximately 0.5 mm to approximately 3 mm. In particular, the distance 186 is approximately 1 mm.

[0197] The nozzle attachment is, in particular, made entirely of plastic. The cleaning element 98, the fluid outlets 94 and the nozzles 118 forming them, the support element 100, and the sealing element 88 are made of plastic. As described, some of these components are dimensionally stable, while others are flexible.

[0198] To control the conveying device 18 to activate and deactivate a fluid discharge, the cleaning device 10 comprises a control device 188, as shown schematically in Figure 2.

[0199] Further exemplary embodiments of nozzle attachments are schematically illustrated in Figures 18 to 44 and are each designated by the reference numeral 50. The further exemplary embodiments of nozzle attachments 50 differ from the exemplary embodiment described above in connection with Figures 7 to 17 in the design of the cleaning element 98 and the shape or contour of the sealing element 88 or the sealing element edge 136. To designate identical or similar or functionally similar components and parts of the nozzle attachments 50, the same reference numerals are used in all further described exemplary embodiments as in the exemplary embodiment of Figures 7 to 17.

[0200] The cleaning elements 98 of the further embodiments of nozzle attachments 50 are designed in particular in the form of round brushes 194 with one or two bristle rings or in the form of scrapers 190 with a sharp blade 192.

[0201] Figures 18 to 23 show a further exemplary embodiment of a nozzle attachment 50. It differs from the exemplary embodiment of Figures 7 to 17 in particular in the design of the sealing element 88, which is sleeve-shaped and defines a circular sealing element edge 136. The two fluid outlets 94 are arranged or formed in the center of the nozzle part 66 and are surrounded by a plurality of circularly arranged bristles 102, which thus form a bristle ring projecting in the distal direction to form a round brush 194. The sealing element 88 surrounds the bristle ring or bristle rim concentrically to the longitudinal axis 112 of the nozzle suction channel.

[0202] The bristles 102 are received in recesses 106 on the carrier element 100. The recesses are designed as holes open in the distal direction.

[0203] Another exemplary embodiment of a nozzle attachment 50 is illustrated by way of example in Figures 24 to 28. This exemplary embodiment is designed almost identically to the exemplary embodiment of Figures 18 to 23, so that reference can be made in its entirety to the above description. In the exemplary embodiment of the nozzle attachment 50 according to Figures 24 to 28, the two fluid outlets 94 are spaced somewhat further apart and are somewhat wider. This allows for more cleaning fluid to be dispensed with a wider jet and, in particular, for the bristles 102 to be moistened even more effectively.

[0204] In the embodiments of Figures 7 to 28, the fluid outlets 94 are formed integrally, namely monolithically, on the carrier element 100.

[0205] Another embodiment of a nozzle attachment 50 is shown in Figures 29 to 34, which is very similar to the embodiment of Figures 24 to 28. However, it differs from the embodiment of Figures 24 to 28 in that the nozzle 118 and the carrier element 100 are formed separately from one another. This makes it possible to form the nozzle 118 from a different material than the carrier element 100. For example, the nozzle 118 can be formed from a metallic material, while the carrier element 100 can be formed from a plastic material.

[0206] A distally facing contact surface 210 is formed on the nozzle 118, and a proximally facing contact surface 212 is formed on the carrier element 100, which contact surface is in contact with the contact surface 210. The contact surfaces 210, 212 are formed in the form of annular surfaces and extend in a plane transverse to the nozzle suction channel longitudinal axis 112. The carrier element 100 and the nozzle 118 can optionally be bonded to one another with an adhesive that is introduced between the contact surfaces 210 and 212, thus also fluidically sealing them against one another.

[0207] The nozzle 118 in the nozzle attachment 50 according to the embodiment of Figures 29 to 34 comprises a single fluid outlet 94, which forms a fan nozzle 120. To avoid repetition, reference is made to the previous description regarding the remaining structure of this embodiment of a nozzle attachment 50. Figures 35 to 39 illustrate a further embodiment of a nozzle attachment 50 by way of example. Its structure is very similar to the embodiment of Figures 29 to 34. In particular, it comprises a nozzle 118 formed analogously, separately from the carrier element 100.

[0208] The embodiment of Figures 35 to 39 differs from the embodiment of Figures 29 to 34 in particular by the size of the carrier element 100. This element is somewhat larger in diameter to accommodate two rings formed by a plurality of bristles 102. Here, too, the longitudinal axes of the bristles 102 extend distally from the carrier element 100, parallel to the nozzle suction channel longitudinal axis 112. In this way, a round brush 194 can be formed with the bristles 102, which has two closed, circular rows of bristles 110.

[0209] In this embodiment, the fluid outlet 94 is also designed in the form of a fan nozzle 120.

[0210] In order to accommodate the larger support element 100 and nevertheless form a suction channel inlet 96, which surrounds the support element 100 in a ring shape, with a sufficiently large free cross-section, the sealing element carrier 86 expands slightly in the distal direction in terms of its inner diameter, specifically in the region of the support element 100. The suction channel inlet 96 is formed between the support element 100 and the sealing element carrier 86.

[0211] Furthermore, with regard to the structural design of the exemplary embodiment of the nozzle attachment 50 according to Figures 35 to 39, reference can be made to the preceding description.

[0212] Figures 40 to 44 show an example of a further exemplary embodiment of a nozzle attachment designated by reference numeral 50. Its structure is similar to the exemplary embodiment shown in Figures 7 to 17. However, it differs in the design of the cleaning element 98. In this exemplary embodiment, the cleaning element 98 is in the form of a scraper 190 with a blade 192 pointing in the distal direction. The scraper 190 is formed integrally, namely monolithically, with the carrier element 100 and protrudes in the distal direction. The cleaning element 98 defines a cleaning element plane 122 that runs parallel to the nozzle suction channel longitudinal axis 112. Optionally, the nozzle suction channel longitudinal axis 112 can also lie in the cleaning element plane 122.

[0213] In this embodiment, the nozzle 118 is also formed integrally, namely monolithically, with the carrier element 100. It comprises a single fluid outlet 94, which is designed as a fan nozzle 120. The fluid outlet 94 is laterally offset relative to the cleaning element plane 122, so that the cleaning fluid can wet a side surface 214 of the cleaning element 98.

[0214] The sealing element carrier 86 tapers in its inner diameter distally of the carrier element 100 and forms a suction channel inlet with a substantially rectangular cross-section. A distal end 134 of the sealing element carrier 86 defines a plane inclined relative to the nozzle suction channel longitudinal axis 112, which runs parallel to an edge plane 140 of the sealing lip 130 formed distally from the sealing element 88. The edge plane 140 is inclined approximately at an angle in the range between 35° and 45° relative to the nozzle suction channel longitudinal axis 112.

[0215] A straight scraping edge of the blade 192 projects slightly beyond the edge plane 140 so that when the nozzle attachment 50 is placed on a surface to be cleaned, the blade 192 can first come into contact with the surface to be cleaned.

[0216] In all of the above-described embodiments of nozzle attachments 50, a locking device 196 is used to couple the adapter part 60 to the handpiece 48. This locking device comprises a locking element 198, which is pivotably mounted on the outside of the adapter part 62 about a pivot axis 200 extending transversely to the nozzle suction channel longitudinal axis 112. It is held in a basic position by means of a compression spring 202, in which position a locking hook 204 protruding from the locking element 198 engages in a correspondingly designed locking recess 206 on the handpiece 48 when the handpiece 48 is inserted with its distal end into the first adapter part end 76 of the adapter part 62.Due to the described design of the locking device 196 or the connecting device 70, as shown in particular in the figures, the adapter part 62 is secured in the handpiece 48 not only in the axial direction, i.e. against withdrawal of the adapter part from the handpiece 48 in the distal direction parallel to the nozzle suction channel longitudinal axis 112, but also against rotation about the nozzle suction channel longitudinal axis 112 relative to the handpiece 48.

[0217] Figures 45 and 46 show an alternative embodiment of a handpiece 48. In this embodiment, the adapter part 62 is angled at an adapter part angle 84 of approximately 135°, as can also be clearly seen in Figures 47 and 48. As schematically illustrated in Figure 48, the first adapter part longitudinal axis 80 and the second adapter part longitudinal axis 82 are inclined relative to each other by the adapter part angle 84.

[0218] The adapter part 62 can be coupled to the handpiece 48 by its first adapter part end 76, specifically by a conventional snap-in connection (not described in detail). The sealing part 64 is placed and coupled with a proximal end 146 onto the second adapter part end 78. A bayonet connection device 178 is provided for this purpose.

[0219] A proximal end of the adapter part fluid channel 74 on the sealing part 64 is connected to the adapter part 62 in a locking manner. Locking lugs 216 serve this purpose; in a connected position, they engage behind a proximal-facing annular locking surface on the adapter part 62, pointing radially outward. A distal end of the nozzle attachment 50 is designed analogously to the embodiment of Figures 7 to 17. A nozzle 118 with two fluid outlets 94 is integrally formed on the carrier element 100. The nozzle is directed toward a cleaning element 98 in the form of a row of bristles 110 comprising a plurality of bristles 102 to form a joint brush. Here, too, a flexible, deformable end region of the sealing element 88 surrounds the cleaning element 98.

[0220] Cleaning element end surfaces 182 of bristles 102 protrude slightly beyond sealing lip 130 on the distal side, as can be seen particularly clearly in Figure 46. When nozzle attachment 50 comes into contact with a surface to be cleaned, bristles 102 initially touch the surface. By pressing nozzle attachment 50 onto the surface to be cleaned, sealing lip 130 can then also come into contact with the surface and seal off a cleaning area, which is delimited by sealing element edge 136, from the surroundings.

[0221] The handpiece according to the exemplary embodiment of Figures 45 to 48 also features an actuating device 68 for activating or deactivating a valve device 52 to activate or deactivate the discharge of cleaning fluid from the fluid outlets 94 onto the surface to be cleaned. The basic structure of the actuating device 68 and the valve device 52 corresponds to that of the exemplary embodiment according to Figures 1 to 6, so that reference can be made to the above description in this regard.

[0222] Figures 49 to 58 show further embodiments of nozzle attachments 50 that are compatible with the handpiece 48 schematically illustrated in Figures 45 and 46. The nozzle parts 66 and sealing parts 64 of these embodiments correspond or substantially correspond to the embodiments of nozzle parts 66 and sealing parts 64 described in connection with Figures 7 to 44. Figures 49 and 50 show an embodiment of a nozzle attachment 50 whose distal design corresponds to that of the nozzle attachment 50 according to Figures 18 to 23, so that reference can be made to the above description in this regard. A proximal end of the nozzle attachment 50 can be coupled to the adapter part 62 according to the embodiment of Figures 45 to 48, as described in connection with Figures 45 to 48.This also applies accordingly to the exemplary embodiments of nozzle attachments 50 described in more detail below, as shown in Figures 51 to 58.

[0223] Figures 51 and 51 show a further embodiment of a nozzle attachment 50, the distal end region of the sealing part 64 of which is identical to the distal end region of the sealing part 64 according to Figures 24 to 28, so that reference can again be made to the above description.

[0224] The adapter part 62, with its first adapter part end 76, can be inserted into a distal end of the handpiece 48, as explained in connection with Figures 45 to 48, and connected thereto in a locking manner. For this purpose, a locking element 220 is provided, which points in the proximal direction and is formed integrally with the adapter part 62 and is designed to be resilient. Upon insertion into the handpiece 48, it can be deflected in the direction of the first adapter part longitudinal axis 80 and, upon engaging in a corresponding recess on the handpiece 48, can pivot away from the first adapter part longitudinal axis 80 again due to the resilient design, in order to connect the adapter part 62 and the handpiece 48 to one another in a locking manner.

[0225] Figures 53 and 54 show a further exemplary embodiment of a nozzle attachment 50. Here, a distal end region of the sealing part 64 is designed identically to the exemplary embodiment of Figures 29 to 35, so that reference can be made to the above description in this regard. It should be expressly noted that in this exemplary embodiment, the carrier element 100 is designed separately from the nozzle 118, which enables the two components to be manufactured from different materials. Figures 55 and 56 show an example of a further exemplary embodiment of a nozzle attachment 50 which can be coupled to a handpiece 48, which was described in connection with Figures 45 to 48. In this exemplary embodiment, a distal end region of the sealing part 64 is designed identically to the exemplary embodiment of Figures 35 to 39, so that reference can be made to the above description in this regard.In this embodiment, the adapter part 62 is also identical to the adapter parts 62 described above and below in connection with the embodiments of Figures 45 to 54 and 57 and 58.

[0226] Another embodiment of a nozzle attachment 50 is schematically illustrated in Figures 57 and 58. A distal end region of the sealing part 64 is configured identically to the embodiment of Figures 40 to 44. A scraper 190 with a blade 192 is provided on the carrier element 100 as the cleaning element 98. In this embodiment, the nozzle 118 comprises a single fluid outlet 94, which is directed toward one of the two side surfaces 214 of the cleaning element 98.

[0227] With the described embodiments of nozzle attachments 50, flat and curved surfaces can be cleaned efficiently and gently.

[0228] List of reference symbols

[0229] cleaning device

[0230] Spray extraction device

[0231] Housing

[0232] Suction device

[0233] conveyor system

[0234] Suction connection

[0235] Cleaning fluid connection

[0236] Cleaning fluid container

[0237] Dirty water container

[0238] Cleaning device hose

[0239] Hose suction channel first hose suction channel end second hose suction channel end

[0240] Hose fluid channel first hose fluid channel end second hose fluid channel end

[0241] suction hose

[0242] Fluid hose

[0243] suction nozzle

[0244] Handpiece

[0245] nozzle attachment

[0246] Valve device

[0247] Handpiece fluid channel

[0248] Handpiece suction channel

[0249] battery

[0250] shoe

[0251] Adapter part

[0252] Sealing part

[0253] nozzle part

[0254] Actuating device Connecting device Adapter part suction channel Adapter part fluid channel First adapter part end Second adapter part end First adapter part longitudinal axis Second adapter part longitudinal axis Adapter part angle Sealing element carrier Sealing element Nozzle suction channel Nozzle fluid channel Fluid outlet Suction channel inlet Cleaning element Carrier element Bristle

[0255] Bristle bundle Recess Joint brush Bristle row Nozzle suction channel Longitudinal axis Mirror plane

[0256] Mirror plane nozzle

[0257] Fan nozzle

[0258] Cleaning element level Cleaning fluid jet Jet level Inclination angle Sealing lip distal end Sealing element edge Cleaning element end

[0259] Edge plane

[0260] Sealing element section proximal end proximal end distal end region

[0261] Ring surface free sealing element length distal end free cleaning element length

[0262] Nozzle partial fluid channel

[0263] Sealing part suction channel first coupling device first coupling element second coupling element first bayonet connection device

[0264] Arrow second coupling device third coupling element fourth coupling element second bayonet connection device

[0265] Carrier element fluid channel

[0266] Cleaning element end face

[0267] End face plane

[0268] Distance

[0269] Control device

[0270] scraper

[0271] blade

[0272] Round brush

[0273] Locking device

[0274] Locking element

[0275] Swivel axis

[0276] Compression spring, locking hook, locking recess, ring seal, contact surface, contact surface, side surface, locking lug, locking surface, locking element

Claims

Patent claims 1. Nozzle attachment (50) for a handpiece (48) of a cleaning device (10), in particular for a handpiece (48) of a spray extraction device (12) or a steam cleaner, wherein the nozzle attachment (50) comprises a nozzle suction channel (90) and a nozzle fluid channel (92) fluidically separated therefrom, wherein the nozzle fluid channel (92) comprises at least one fluid outlet (94) on the distal side for dispensing a cleaning fluid, wherein the nozzle suction channel (90) comprises at least one suction channel inlet (94) on the distal side for receiving a dirty water, and wherein the nozzle attachment (50) comprises at least one cleaning element (98) which is arranged or formed on a carrier element (100), characterized in that the at least one fluid outlet (94) is arranged or formed on the carrier element (100).

2. Nozzle attachment according to claim 1, characterized in that the at least one fluid outlet (94) and the carrier element (100) are formed in one piece, in particular monolithically.

3. Nozzle attachment according to one of the preceding claims, characterized in that the nozzle attachment (50) comprises one fluid outlet, two, three or more fluid outlets.

4. Nozzle attachment according to one of the preceding claims, characterized in that the nozzle suction channel (90) defines a nozzle suction channel longitudinal axis (112) and that the nozzle attachment (50) is mirror-symmetrical or substantially mirror-symmetrical with respect to at least one mirror plane containing the nozzle suction channel longitudinal axis (112).

5. Nozzle attachment according to one of the preceding claims, characterized in that the at least one fluid outlet (94) is in the form of a Nozzle (118) is designed, in particular in the form of a point jet nozzle for generating a point jet or a cone jet nozzle for generating a cone jet, wherein in particular the nozzle (118) a) is designed in the form of a fan nozzle (120) for generating a fan jet and / or b) is held on the carrier element (100) in a force-fitting and / or form-fitting and / or material-fitting manner and / or c) is designed as a separate component and can be detachably connected to a distal end of the nozzle fluid channel (92), in particular can be screwed or locked.

6. Nozzle attachment according to one of the preceding claims, characterized in that the at least one fluid outlet (94) is directed at least partially, in particular completely, towards the at least one cleaning element (98) for wetting the at least one cleaning element (98) with cleaning fluid.

7. Nozzle attachment according to one of the preceding claims, characterized in that the at least one cleaning element (98) defines a cleaning element longitudinal axis or a cleaning element plane (122), that the at least one fluid outlet (94) is designed to generate a cleaning fluid jet (124) which defines a jet axis or a jet plane (126), and that the jet axis or the jet plane (126) on the one hand and the cleaning element longitudinal axis or the cleaning element plane (122) on the other hand enclose an angle of inclination (128), wherein in particular the angle of inclination (128) has a value in a range from approximately 0° to approximately 30°.

8. Nozzle attachment according to one of the preceding claims, characterized in that the nozzle attachment (50) comprises a sealing element (88) projecting in the distal direction and delimiting the suction channel inlet (96).

9. Suction nozzle according to claim 8, characterized in that the at least one cleaning element (98) protrudes distally and in the distal direction beyond the sealing element (88), wherein in particular the sealing element (88) a) is designed to be deformable, in particular flexible and / or elastic, and / or b) is designed in the form of a sealing lip (130) and / or c) is designed to be sleeve-shaped and extends parallel or substantially parallel to a nozzle suction channel longitudinal axis (112) of the nozzle attachment (50), in particular concentrically, and / or d) is arranged or formed on a sealing element carrier (86), wherein in particular the sealing element carrier (86) is designed to be sleeve-shaped and / or the sealing element (88) is arranged or formed on the distal side protruding beyond a distal end (134) of the sealing element carrier (86) and / or the sealing element (88) is connected to the sealing element carrier (86) in a force-fitting and / or form-fitting and / or material-fitting manner,wherein in particular the sealing element (88) is injection-molded onto the sealing element carrier (86), and / or the sealing element carrier (86) is dimensionally stable or substantially dimensionally stable., 10. Nozzle attachment according to claim 8 or 9, characterized in that the sealing element (88) a) forms a self-contained boundary of the suction channel inlet (94) and / or b) defines a sealing element edge (136) on the distal side, that the at least one cleaning element (98) defines a cleaning element end (138) on the distal side and that the cleaning element end (138) protrudes beyond the sealing element edge (136) on the distal side, wherein in particular the sealing element edge (136) defines an edge plane (140), wherein further in particular the edge plane (140) runs transversely, in particular perpendicularly, to the nozzle suction channel longitudinal axis (112), and / or a shape of the sealing element (88) starting from the sealing element edge (136) in the direction of the sealing element carrier (86) is constant over a sealing element section (142).

11. Nozzle attachment according to claim 9 or 10, characterized in that the sealing element (88) a) has a constant cross-section starting from the sealing element carrier (86) and / or b) has a decreasing cross-section starting from the sealing element carrier (86).

12. Nozzle attachment according to one of claims 9 to 11, characterized in that a) a cross-section defined by the sealing element carrier (86) decreases in the direction towards the sealing element edge (136) and / or b) a distal end (134) of the sealing element carrier (86) defines an end contour and that the end contour corresponds or substantially corresponds to a shape of the sealing element edge (136) and / or c) a cross-sectional shape of the sealing element (88) changes from the sealing element carrier (86) in the direction of the sealing element edge (136) and / or d) the sealing element carrier (86) has a circular cross-section at an end (146) pointing away from the sealing element (88) and / or e) the sealing element (88) has, starting from a distal end (134) of the sealing element carrier (86), a free sealing element length (152) parallel to the nozzle suction channel longitudinal axis (112), that the at least one cleaning element (98) has, starting from a distal end (154) of the carrier element (100), a free cleaning element length (156) parallel to the nozzle suction channel longitudinal axis (112) and that the cleaning element length (156) is greater than the sealing element length (152).

13. Nozzle attachment according to one of the preceding claims, characterized in that the nozzle attachment (50) is designed in several parts and comprises an adapter part (62) for connection to a handpiece (48), a nozzle part (66) and a sealing part (64), and in that the nozzle part (66), the sealing part (64) and the adapter part (62) are designed to be detachably connectable to one another, wherein in particular the nozzle part (66) defines a nozzle part fluid channel (158) which is fluidically connected to the at least one fluid outlet (94), and in that the sealing part (64) defines a sealing part suction channel (160) which is fluidically connected to the suction channel inlet (96).

14. Nozzle attachment according to claim 13, characterized in that the nozzle part (66) a) and the sealing part (64) are designed to be detachably connectable to one another and / or b) and the adapter part (62) are designed to be detachably connectable to one another and / or c) comprises the carrier element (100).

15. Nozzle attachment according to claim 13 or 14, characterized in that the sealing part (64) comprises the sealing element (88).

16. Nozzle attachment according to one of claims 13 to 15, characterized in that the nozzle attachment (50) comprises a first coupling device (162) for detachably connecting the nozzle part (66) and the adapter part (62) to one another, wherein in particular the first coupling device (162) a) comprises first and second coupling elements (164, 166) which are arranged or formed on the one hand on the nozzle part (66) and on the other hand on the adapter part (62), and in that the first second coupling elements (164, 166) are non-positively and / or positively engaged in a coupling position and are disengaged in a separation position, and / or b) is designed in the form of a first bayonet connection device (168).

17. Nozzle attachment according to one of claims 13 to 16, characterized in that the sealing part (64) and the adapter part (62) are designed to be detachably connectable to one another.

18. Nozzle attachment according to one of claims 13 to 17, characterized in that the nozzle attachment (50) comprises a second coupling device (172) for releasably connecting the sealing part (64) and the adapter part (62) to one another, wherein in particular a) the second coupling device (172) comprises third and fourth coupling elements (174, 176) which are arranged or formed on the one hand on the nozzle part (66) and on the other hand on the adapter part (62), and in that the third and fourth coupling elements (174, 176) are non-positively and / or positively engaged in a coupling position and are disengaged in a separation position, and / or b) the second coupling device (172) is designed in the form of a second bayonet connection device (178) and / or c) the adapter part (62) has a first adapter part end (76) and a second adapter part end (78) includes,that the first adapter part end (76) is detachably connectable to a handpiece (48) and that the second adapter part end (78) is detachably connectable to the nozzle part (66) and / or the sealing part (64), and / or d) the first adapter part end (76) defines a first adapter part longitudinal axis (80), that the second adapter part end (78) defines a second adapter part longitudinal axis (82), and that the first adapter part longitudinal axis (80) and the second adapter part longitudinal axis (82) enclose an adapter part angle (84) which has a value in a range from 180° to approximately 90°, in particular a value of approximately 135°, 19. Nozzle attachment according to one of claims 13 to 18, characterized in that the adapter part (62) defines an adapter part suction channel (72) and an adapter part fluid channel (74) which are fluidically separated from each other are separated, and that the adapter part fluid channel (74) is fluidly connected to the nozzle part fluid channel (158) in the first coupling position and that the adapter part suction channel (72) is fluidly connected to the sealing part suction channel (160) in the second coupling position.

20. Nozzle attachment according to one of claims 10 to 19, characterized in that the sealing element edge (136) delimits the suction channel inlet (96) and is oval, circular, polygonal, in particular triangular, square or pentagonal.

21. Nozzle attachment according to one of the preceding claims, characterized in that the carrier element (100) is dimensionally stable or substantially dimensionally stable.

22. Nozzle attachment according to one of the preceding claims, characterized in that a suction channel inlet contour of the suction channel inlet (96) is geometrically similar to a cleaning element contour defined by the at least one cleaning element (98).

23. Nozzle attachment according to one of the preceding claims, characterized in that the at least one cleaning element (98) is designed to be fluid-permeable.

24. Nozzle attachment according to one of the preceding claims, characterized in that the at least one cleaning element (98) is formed in a closed ring shape and surrounds the fluid outlet (94).

25. Nozzle attachment according to one of the preceding claims, characterized in that the at least one cleaning element (98) a) is designed in a brush-like manner and comprises a plurality of bristles (102) and / or bristle bundles (104) and / or b) is designed in the form of a ring brush (194) with at least one self-contained ring-shaped bristle ring and / or c) is designed in the form of a joint brush (108) with a row of bristles (110) comprising a plurality of bristles (102) and / or d) is designed in the form of a scraping element (190) with a scraping edge (192) pointing in the distal direction.

26. Nozzle attachment according to one of the preceding claims, characterized in that the carrier element (100) is sleeve-shaped and comprises a carrier element fluid channel (180) fluidly connected to the at least one fluid outlet (94).

27. Nozzle attachment according to one of the preceding claims, characterized in that the fluid outlet (94) defines a free fluid outlet cross-section, that the suction channel inlet (96) defines a free suction channel inlet cross-section and that a ratio of cross-sectional areas defined by the fluid outlet cross-section and the suction channel inlet cross-section is in a range from approximately 1 / 100 to approximately 1 / 20, in particular in a range from approximately 1 / 100 to approximately 1 / 50.

28. Nozzle attachment according to one of the preceding claims, characterized in that the at least one cleaning element (98) has a cleaning element end surface (182) on the distal side and that the cleaning element end surface (182) defines an end surface plane (184) which runs transversely, in particular perpendicularly, to a nozzle suction channel longitudinal axis (112) of the nozzle attachment (50), wherein in particular a) the cleaning element end surface (182) is defined by end surfaces of free ends of the plurality of bristles (102) pointing in the distal direction and / or b) the edge plane (140) and the end surface plane (184) run parallel to one another and that the end surface plane (184) runs distally of the edge plane (140) and / or c) the edge plane (140) and the end surface plane (184) are at a distance (186) from one another and that the distance (186) has a value in a range from approximately 0.5 mm to approximately 3 mm, in particular a value of approximately 1 mm.

29. Nozzle attachment according to one of the preceding claims, characterized in that the nozzle attachment (50), in particular the at least one cleaning element (98) and / or the at least one fluid outlet (94) and / or the carrier element (100) and / or the sealing element (88), is formed from a plastic.

30. Suction nozzle (46) for a cleaning device (10), in particular for a spray extraction device (12) or a steam cleaner, which suction nozzle (46) comprises a handpiece (48) and a nozzle attachment (50), characterized in that the nozzle attachment (50) is designed in the form of a nozzle attachment (50) according to one of the preceding claims.

31. Suction nozzle according to claim 30, characterized in that the handpiece (48) a) and the nozzle attachment (50) are designed to be detachably connectable to one another and / or b) and the adapter part (62) are designed to be detachably connectable to one another.

32. Cleaning device hose (28) for a cleaning device (10), in particular for a spray extraction device (12) or a steam cleaner, wherein the cleaning device hose (28) has a hose suction channel (30) with a first and a second hose suction channel end (32, 34) and a Hose fluid channel (36) with a first and a second hose fluid channel end (38, 40), wherein the first hose suction channel end (32) and the first hose fluid channel end (38) are connected or connectable to a handpiece (48) of a suction nozzle (46), characterized in that the suction nozzle (46) is designed in the form of a suction nozzle (46) according to claim 30 or 31.

33. Cleaning device hose according to claim 70, characterized in that the second hose suction channel end (34) is or can be connected in a fluid-effective manner to a suction connection (20) of the cleaning device (10) and that the second hose fluid channel end (40) is or can be connected in a fluid-effective manner to a fluid connection (22) of the cleaning device (10).

34. Cleaning device (10), in particular in the form of a spray extraction device (12) or a steam cleaner, comprising a suction device (16), a conveying device (18), a suction connection (20) and a cleaning fluid connection (22), wherein the suction device (16) is fluidly connected to the suction connection (20) and wherein the conveying device (18) is fluidly connected to the cleaning fluid connection (22), wherein the cleaning device (10) further comprises a cleaning device hose (28) connected or connectable to both the suction connection (20) and the cleaning fluid connection (22), characterized in that the cleaning device hose (28) is designed in the form of a cleaning device hose (28) according to one of claims 32 or 33.

35. Cleaning device according to claim 34, characterized in that the cleaning device (10) comprises a control device (188) for controlling the conveying device (18) for activating and deactivating a fluid discharge.

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