EP3488752B1 - Floor nozzle for a vacuum cleaner - Google Patents

Floor nozzle for a vacuum cleaner Download PDF

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Publication number
EP3488752B1
EP3488752B1 EP17203366.4A EP17203366A EP3488752B1 EP 3488752 B1 EP3488752 B1 EP 3488752B1 EP 17203366 A EP17203366 A EP 17203366A EP 3488752 B1 EP3488752 B1 EP 3488752B1
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EP
European Patent Office
Prior art keywords
vacuum cleaner
floor nozzle
superelevation
nozzle according
cleaner floor
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EP17203366.4A
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German (de)
French (fr)
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EP3488752A1 (en
Inventor
Klaus-Dieter Riehl
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Wessel Werk GmbH
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Wessel Werk GmbH
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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/02—Nozzles

Definitions

  • the invention relates to a vacuum cleaner floor nozzle, in particular a static vacuum cleaner floor nozzle with a housing and a sliding base arranged on the underside of the housing.
  • a suction mouth is arranged in the sliding sole, which extends in a transverse direction and which is delimited by a border.
  • the sliding sole has a flat area in front of and / or behind the suction mouth in a working direction perpendicular to the transverse direction.
  • Vacuum cleaner floor nozzles are designed for use with vacuum cleaners.
  • the cleaning principle is based on the fact that a fan generates a suction air flow in the vacuum cleaner with which dirt particles are drawn off from surfaces to be cleaned, in particular floor surfaces.
  • the vacuum cleaner has a dirt collecting device in which the dirt particles are separated from the suction air flow and collected.
  • filter bag arrangements and cyclone separators are common.
  • a suction air duct which guides the suction air flow into the dirt collecting space.
  • vacuum cleaner floor nozzles with the generic features are known.
  • the sliding sole on the underside faces a floor surface to be cleaned during the cleaning operation.
  • the sliding sole can rest directly on the floor surface during operation on permeable floor coverings such as carpets.
  • suspension means for example bristle strips, Support rollers and the like is held at a small distance from the floor surface.
  • the minimum distance between the sliding sole and the floor surface to be cleaned in smooth floor operation is usually at least 2 mm.
  • the invention is based on the object of specifying a vacuum cleaner floor nozzle with favorable cleaning properties, in which at the same time protection of the floor covering to be cleaned is achieved and which is easy to handle.
  • the invention Based on the generic vacuum cleaner floor nozzle, the invention provides that the sliding sole between the flat area and the suction mouth has a cant continuously adjoining the flat area, which protrudes downward beyond the extension of the flat area. Due to the continuous transition, the sliding sole can easily slide over uneven floors and obstacles onto the floor to be cleaned, in particular coarse dirt particles.
  • the cant forms an integral part of the sliding sole and is seamlessly integrated into it.
  • the elevation has a height of less than 2 mm, in particular less than 1.5 mm. Such a slight surge is sufficient to generate a flow acceleration effective for cleaning in the area of the suction mouth edge adjacent to the elevation. At the same time, the overhang is small enough to allow safe sliding in connection with obstacles.
  • the height of the elevation is expediently at least 0.5 mm, in particular at least 1 mm.
  • the elevation has a width of less than 3 mm, in particular less than 2 mm. Larger peaks form too large a contact area, which provides an additional seal in the case of suction.
  • the width of the elevation is to be determined using the half-width of the profile.
  • a transition area of the elevation between the flat area and half the maximum height of the elevation preferably has a width of less than 10 mm.
  • the transition area is very particularly preferably narrower than 5 mm.
  • the minimum width for the transition area is at least 1 mm, preferably at least 3 mm. In the specified parameter ranges, a sufficiently smooth transition from the flat area to the camber is possible without taking up too much space.
  • the flat area is designed as a suction plateau.
  • a suction platform is in the working position, especially when the vacuum cleaner floor nozzle is in contact with the floor surface to be cleaned and is aligned parallel to this floor surface.
  • the suction plateau has a preferred width between 3 mm and 15 mm and is used in particular to support the vacuum cleaner floor nozzle on air-permeable floor coverings, such as carpeting.
  • the sealing plateau creates a certain sealing effect between the underside of the vacuum cleaner floor nozzle and the floor material, so that a considerable proportion of the suction air flow is passed through the floor material. As a result, dirt particles can be picked up.
  • the elevation according to the invention protrudes into the air-permeable and elastic floor material.
  • a variable compression is generated, so that the floor material is loosened and the loosening of the dirt is simplified.
  • the incoming suction air flow experiences a strong deflection at the sharp bend, which also creates positive turbulence for the dirt pick-up.
  • the flat area is designed as a sliding slope.
  • This can in particular be a slide-on bevel in front of the front suction mouth edge or a slide-off bevel behind the rear suction mouth edge.
  • a slide-on slope preferably has a width between 5 mm and 20 mm, and a slide-on slope has a preferred width between 15 mm and 40 mm.
  • the sliding slope is opposite in each case the horizontal or with respect to the floor surface to be cleaned - inclined by an angle between 3 ° and 20 °, in particular by 5 ° to 10 °.
  • the flat area is preferably designed as a recess in the sliding sole.
  • protruding sections of the sliding sole run in the transverse direction next to the flat area, which protrude further downwards than the flat area itself.
  • the elevation at its highest point can reach the same level as the laterally protruding area.
  • the transition between the flat area and the elevation is particularly preferably smooth. This means that the contour of the elevation follows a continuously differentiable curve, preferably a 2-fold continuously differentiable curve. Curves of this configuration form a particularly smooth transition, which leads to low sliding resistance when hitting obstacles.
  • the contour of the elevation can also be linear, at least in sections. Particularly preferably, the contour of the elevation does not fall below a radius of curvature of 1 mm. Large radii of curvature in the transition areas also contribute to a particularly smooth transition.
  • the maximum height of the elevation is a distance from the edge of the suction mouth of is less than 1 mm.
  • the elevation is particularly preferably arranged immediately adjacent to the edge of the suction mouth.
  • an inner plateau with a width between 1 mm and 3 mm is arranged between the suction mouth and the elevation immediately adjacent to the edge of the suction mouth.
  • the inner plateau does not protrude from the flat surface. It is preferably oriented horizontally in the working position.
  • the transition between the elevation and the inner plateau is also expediently continuous.
  • the inner plateau ends with the suction mouth edge, which at the same time provides the edge of the suction mouth. Due to the elevation and the edge of the suction mouth, two flow resistances are connected one behind the other at a short distance, which leads to a turbulence which is favorable in terms of cleaning technology.
  • the area of elevation between the first point of the level area, at which half the maximum height is reached, to the last point before the edge of the suction mouth at which half the maximum height is reached, is also referred to as the "crest" of the elevation.
  • the section between the crest and the flat area forms the transition between the flat area and the superelevation.
  • the gradient of the contour of the transition in the direction of the suction mouth edge preferably increases monotonically, in particular strictly monotonically, and decreases monotonically, in particular strictly monotonically, in the region of the crest of the elevation.
  • the summit of the elevation is designed in the form of a circular arc segment, in particular a semicircle.
  • the summit of the elevation has a plateau.
  • the plateau expediently has a width between 0.3 mm and 1 mm.
  • FIG. 1 shows the underside of a vacuum cleaner floor nozzle according to the invention according to a first embodiment.
  • the vacuum cleaner floor nozzle has a housing 1 on which a sliding sole 2 is arranged on the underside.
  • a suction mouth 3 is provided within the sliding sole 2, which is connected to a suction air duct for receiving a suction air stream.
  • the suction air duct comprises a connection flange 4 connected to the rear end of the housing in a working direction x for connection to a vacuum cleaner.
  • Also at the rear end of the housing 1 are two rollers 5 for supporting the housing.
  • the suction mouth 3 extends essentially in a transverse direction y that is transverse to the working direction x.
  • the border 6 of the suction mouth which delimits the suction mouth 3, can be seen.
  • the suction mouth is designed to be open for edge suction.
  • FIGS Figures 2A to 2F The profiling of the sliding sole 2 according to the invention is shown in various exemplary embodiments in FIGS Figures 2A to 2F shown using the example of the rear suction mouth edge 6.
  • the front edge of the suction mouth can alternatively or additionally also have one Figures 2A to 2F have a similar course mirrored in the working direction x.
  • FIG. 2A The profile of the sliding sole of a first embodiment shown is shown only in part in the area immediately rearward adjoining the suction mouth 3.
  • the suction mouth is only indicated in the form of the rear suction mouth wall 7, which is inclined inward in the exemplary embodiment.
  • the rear suction mouth wall 7 can without restriction of Invention also run vertically or inclined outwardly adjacent to the suction mouth.
  • a flat area 8 in the form of a horizontally extending suction plateau 9 is arranged behind the suction mouth 3. At the rear, the plateau 9 is followed by a sliding slope 10 with an angle of inclination ⁇ relative to the horizontal of approximately 7 °.
  • an elevation 11 is arranged between the flat area 8, 9 and the suction mouth 3, which protrudes downward from an extension 12 of the flat area 8, 9 by a maximum height h of less than 2 mm.
  • the elevation 11 is not shown to scale, but is greatly exaggerated.
  • the half-width b of the elevation 11 is less than 3 mm, while the transition area between the elevation 11 and the flat area 8, 9 has a width c of less than 10 mm.
  • FIG. 2B Another, alternative embodiment is in Figure 2B shown.
  • the flat area 9 without a suction plateau is designed directly as a sliding slope 10.
  • the structure is otherwise essentially with the design according to Figure 2A identical.
  • the elevation 11 is additionally formed with a plateau 14. This has a width d of a maximum of 0.5 mm.
  • summit of the elevation 11 between the two half-value points is designed as a circular arc segment, specifically as a semicircular arc.
  • FIG. 2F Another variant not according to the invention is shown in Figure 2F shown.
  • the cross section of the elevation 11 essentially corresponds to the illustration from FIG Figure 2C with an inner plateau 13 and a flat area 8 designed as a suction plateau 9.
  • the special feature here is that the suction plateau 9 is formed as part of a recess 14 in the sliding sole 2.
  • the recess is - as one can compare with the Fig. 3 removes - formed in such a way that laterally protruding sections 15 are arranged next to the flat area 8, 9, which are at least partially in alignment with the sliding bevel 10.
  • the highest point of the elevation 11 reaches the same level as the laterally protruding areas 15.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Nozzles For Electric Vacuum Cleaners (AREA)

Description

Die Erfindung betrifft eine Staubsaugerbodendüse, insbesondere eine statische Staubsaugerbodendüse mit einem Gehäuse und einer unterseitig an dem Gehäuse angeordneten Gleitsohle. In der Gleitsohle ist ein Saugmund angeordnet, welcher sich in einer Querrichtung erstreckt und welcher durch eine Berandung begrenzt wird. Die Gleitsohle weist in einer senkrecht zu der Querrichtung stehenden Arbeitsrichtung vor und/oder hinter dem Saugmund einen ebenen Bereich auf.The invention relates to a vacuum cleaner floor nozzle, in particular a static vacuum cleaner floor nozzle with a housing and a sliding base arranged on the underside of the housing. A suction mouth is arranged in the sliding sole, which extends in a transverse direction and which is delimited by a border. The sliding sole has a flat area in front of and / or behind the suction mouth in a working direction perpendicular to the transverse direction.

Staubsaugerbodendüsen sind zur Verwendung mit Staubsaugern vorgesehen. Dabei beruht das Reinigungsprinzip darauf, dass in dem Staubsauger ein Gebläse einen Saugluftstrom erzeugt, mit dem von zu reinigenden Oberflächen, insbesondere Bodenflächen Schmutzpartikel abgezogen werden. Der Staubsauger weist eine Schmutzsammeleinrichtung auf, in der die Schmutzpartikel aus dem Saugluftstrom abgetrennt und gesammelt werden. Dabei sind insbesondere Filtertütenanordnungen und Zyklonabscheider üblich.Vacuum cleaner floor nozzles are designed for use with vacuum cleaners. The cleaning principle is based on the fact that a fan generates a suction air flow in the vacuum cleaner with which dirt particles are drawn off from surfaces to be cleaned, in particular floor surfaces. The vacuum cleaner has a dirt collecting device in which the dirt particles are separated from the suction air flow and collected. In particular, filter bag arrangements and cyclone separators are common.

Zur Steuerung des Saugluftstroms durch einen Benutzer ist eine Saugluftführung vorgesehen, welche dem Saugluftstrom den Schmutzsammelraum zuleitet. Zur Führung des Saugluftstromes an zu reinigenden Bodenflächen sind Staubsaugerbodendüsen mit den gattungsgemäßen Merkmalen bekannt. Die unterseitige Gleitsohle ist im Reinigungsbetrieb einer zu reinigenden Bodenfläche zugewandt. Dabei kann die Gleitsohle im Betrieb auf durchlässigen Bodenbelägen, wie beispielsweise Teppichen, unmittelbar an der Bodenfläche anliegen. Für luftundurchlässige Bodenflächen ist üblicherweise vorgesehen, dass die Gleitsohle mit Tragmitteln, beispielsweise Borstenstreifen, Tragrollen und dergleichen in einem geringen Abstand zur Bodenfläche gehalten ist. Dabei stellt sich ein geringer Spalt zwischen der Staubsaugerbodendüse und der Bodenfläche ein, durch welchen der Saugluftstrom hindurchtritt, bevor er über den Saugmund der Saugluftführung zugeleitet wird. Um Kollisionen zwischen der Gleitsohle und dem Bodenbelag zu vermeiden, beträgt der minimale Abstand zwischen der Gleitsohle und der zu reinigenden Bodenfläche im Glattbodenbetrieb üblicherweise zumindest 2 mm.To control the suction air flow by a user, a suction air duct is provided which guides the suction air flow into the dirt collecting space. For guiding the suction air flow on floor surfaces to be cleaned, vacuum cleaner floor nozzles with the generic features are known. The sliding sole on the underside faces a floor surface to be cleaned during the cleaning operation. The sliding sole can rest directly on the floor surface during operation on permeable floor coverings such as carpets. For air-impermeable floor surfaces, it is usually provided that the sliding sole is provided with suspension means, for example bristle strips, Support rollers and the like is held at a small distance from the floor surface. This creates a small gap between the vacuum cleaner floor nozzle and the floor surface, through which the suction air flow passes before it is fed to the suction air duct via the suction mouth. In order to avoid collisions between the sliding sole and the floor covering, the minimum distance between the sliding sole and the floor surface to be cleaned in smooth floor operation is usually at least 2 mm.

Um die Reinigungseigenschaften einer Staubsaugerbodendüse zu optimieren, werden die Geometrien der Gleitsohlen kontinuierlich weiterentwickelt. Dabei ist stets ein Ausgleich zwischen den Zielen einer guten Reinigungsleistung, der Schonung des zu reinigenden Bodenbelages sowie der Handhabbarkeit anzustreben. Dies wird weiterhin dadurch erschwert, dass im Zuge der EU Ökodesign-Richtlinie die elektrische Leistung von Haushaltsstaubsaugern (und damit die physikalische erreichbare Saugleistung) auf 900 Watt begrenzt sind.In order to optimize the cleaning properties of a vacuum cleaner floor nozzle, the geometries of the sliding soles are continuously developed. A balance must always be sought between the goals of good cleaning performance, protection of the floor covering to be cleaned and manageability. This is made more difficult by the fact that in the course of the EU Ecodesign Directive, the electrical power of household vacuum cleaners (and thus the physically achievable suction power) are limited to 900 watts.

Um im Bereich des Saugmundes höhere Strömungsgeschwindigkeiten zu erreichen ist beispielsweise aus FR 2 871 046 A1 bekannt, die vordere und die hintere Saugmundkante gegenüber der Gleitsohle vorstehen zu lassen. Die in dieser Schrift offenbarten Saugplateaus neigen jedoch dazu, sich bei Kontakt zwischen der Gleitsohle und dem zu reinigenden Bodenbelag "festzusaugen", so dass der Saugluftstrom und damit die Reinigungswirkung unterbrochen wird. Durch den intensiven Kontakt zwischen Gleitsohle und Fußbodenbelag ist dessen Beschädigung nicht auszuschließen.In order to achieve higher flow velocities in the area of the suction mouth, for example, is off FR 2 871 046 A1 known to let the front and the rear suction mouth edge protrude from the sliding sole. The suction plateaus disclosed in this document, however, tend to "suck up" when there is contact between the sliding sole and the floor covering to be cleaned, so that the suction air flow and thus the cleaning effect are interrupted. Damage cannot be ruled out due to the intensive contact between the sliding sole and the floor covering.

Demgegenüber ist in CN 104367268 B an der Gleitsohle eine "Dichtrippe" geringer Breite vorgesehen, welche an der Gleitsohle senkrecht vorsteht. Eine solche Rippe kann sich leicht an Bodenunebenheiten verhaken und so die Handhabung der Staubsaugerbodendüse erschweren. Weiterhin ist es möglich, dass mit der Rippe größere Schmutzkörner über den Bodenbelag geschoben werden, so dass dieser verkratzt werden kann.In contrast, in CN 104367268 B A "sealing rib" of small width is provided on the sliding sole, which protrudes perpendicularly on the sliding sole. Such a rib can easily get caught on uneven floors and thus complicate the handling of the vacuum cleaner floor nozzle. Furthermore, it is possible that larger grains of dirt are pushed over the floor covering with the rib, so that it can be scratched.

Aus EP 3 181 029 A1 ist eine Staubsaugerbodendüse mit den Merkmalen des Oberbegriffs aus Patentanspruch 1 bekannt.Out EP 3 181 029 A1 a vacuum cleaner floor nozzle with the features of the preamble from claim 1 is known.

Vor diesem Hintergrund liegt der Erfindung die Aufgabe zugrunde, eine Staubsaugerbodendüse mit günstigen Reinigungseigenschaften anzugeben, bei der gleichzeitig eine Schonung des zu reinigenden Bodenbelages erzielt wird und die einfach zu handhaben ist.Against this background, the invention is based on the object of specifying a vacuum cleaner floor nozzle with favorable cleaning properties, in which at the same time protection of the floor covering to be cleaned is achieved and which is easy to handle.

Gegenstand der Erfindung und Lösung dieser Aufgabe ist eine Staubsaugerbodendüse nach Anspruch 1. Bevorzugte Ausgestaltungen sind in den Unteransprüchen angegeben.The subject of the invention and the solution to this problem is a vacuum cleaner floor nozzle according to claim 1. Preferred embodiments are given in the subclaims.

Ausgehend von der gattungsgemäßen Staubsaugerbodendüse ist erfindungsgemäß vorgesehen, dass die Gleitsohle zwischen dem ebenen Bereich und dem Saugmund eine an den ebenen Bereich kontinuierlich anschließende Überhöhung aufweist, welche über die Verlängerung des ebenen Bereichs nach unten übersteht. Durch den kontinuierlichen Übergang kann die Gleitsohle einfach über Bodenunebenheiten und Hindernisse auf den zu reinigenden Boden, insbesondere grobe Schmutzpartikel hinweggleiten. Dabei bildet die Überhöhung einen integralen Bestandteil der Gleitsohle und ist in diese nahtlos integriert.Based on the generic vacuum cleaner floor nozzle, the invention provides that the sliding sole between the flat area and the suction mouth has a cant continuously adjoining the flat area, which protrudes downward beyond the extension of the flat area. Due to the continuous transition, the sliding sole can easily slide over uneven floors and obstacles onto the floor to be cleaned, in particular coarse dirt particles. The cant forms an integral part of the sliding sole and is seamlessly integrated into it.

In einer bevorzugten Ausgestaltung weist die Überhöhung eine Höhe von weniger als 2 mm, insbesondere weniger als 1,5 mm auf. Eine derart geringfügige Aufwallung ist ausreichend, um im Bereich der der Überhöhung benachbarten Saugmundkante eine reinigungswirksame Strömungsbeschleunigung zu erzeugen. Gleichzeitig ist der Überstand klein genug, um ein sicheres Gleiten in Verbindung mit Hindernissen zu ermöglichen. Zweckmäßigerweise beträgt die Höhe der Überhöhung zumindest 0,5 mm, insbesondere zumindest 1 mm.In a preferred embodiment, the elevation has a height of less than 2 mm, in particular less than 1.5 mm. Such a slight surge is sufficient to generate a flow acceleration effective for cleaning in the area of the suction mouth edge adjacent to the elevation. At the same time, the overhang is small enough to allow safe sliding in connection with obstacles. The height of the elevation is expediently at least 0.5 mm, in particular at least 1 mm.

Vorzugsweise ist vorgesehen, dass die Überhöhung eine Breite von weniger als 3 mm, insbesondere weniger als 2 mm aufweist. Breitere Überhöhungen bilden eine zu große Aufstandsfläche, welche im Fall des Festsaugens eine zusätzliche Abdichtung liefert. Die Breite der Überhöhung ist anhand der Halbwertsbreite des Profils zu bestimmen.It is preferably provided that the elevation has a width of less than 3 mm, in particular less than 2 mm. Larger peaks form too large a contact area, which provides an additional seal in the case of suction. The width of the elevation is to be determined using the half-width of the profile.

Bevorzugt weist ein Übergangsbereich der Überhöhung zwischen dem ebenen Bereich und der halben Maximalhöhe der Überhöhung eine Breite von weniger als 10 mm auf. Ganz besonders bevorzugt ist der Übergangsbereich schmaler als 5 mm. Die Mindestbreite für den Übergangsbereich beträgt zumindest 1 mm, vorzugsweise zumindest 3 mm. In den angegebenen Parameterbereichen ist ein hinreichend sanfter Übergang von dem ebenen Bereich zur Überhöhung möglich, ohne zu großen Bauraum zu beanspruchen.A transition area of the elevation between the flat area and half the maximum height of the elevation preferably has a width of less than 10 mm. The transition area is very particularly preferably narrower than 5 mm. The minimum width for the transition area is at least 1 mm, preferably at least 3 mm. In the specified parameter ranges, a sufficiently smooth transition from the flat area to the camber is possible without taking up too much space.

In einer bevorzugten Ausgestaltung ist der ebene Bereich als Saugplateau ausgestaltet. Ein Saugplateau ist in Arbeitsstellung, insbesondere wenn die Staubsaugerbodendüse in Kontakt zu der zu reinigenden Bodenfläche ist parallel zu dieser Bodenfläche ausgerichtet. Das Saugplateau weist eine bevorzugte Breite zwischen 3 mm und 15 mm auf und dient insbesondere zur Abstützung der Staubsaugerbodendüse auf luftdurchlässigen Bodenbelägen, wie zum Beispiel Teppichböden. Das Dichtplateau erzeugt eine gewisse Dichtwirkung zwischen der Unterseite der Staubsaugerbodendüse und dem Bodenmaterial, so dass ein beträchtlicher Anteil des Saugluftstromes durch das Bodenmaterial hindurchgeleitet wird. Infolgedessen können Schmutzpartikel mit aufgenommen werden.In a preferred embodiment, the flat area is designed as a suction plateau. A suction platform is in the working position, especially when the vacuum cleaner floor nozzle is in contact with the floor surface to be cleaned and is aligned parallel to this floor surface. The suction plateau has a preferred width between 3 mm and 15 mm and is used in particular to support the vacuum cleaner floor nozzle on air-permeable floor coverings, such as carpeting. The sealing plateau creates a certain sealing effect between the underside of the vacuum cleaner floor nozzle and the floor material, so that a considerable proportion of the suction air flow is passed through the floor material. As a result, dirt particles can be picked up.

Die erfindungsgemäße Überhöhung steht in dieser Konfiguration in das luftdurchlässige und elastische Bodenmaterial vor. Somit wird bei einer Bewegung der Staubsaugerbodendüse über das Bodenmaterial eine variable Komprimierung erzeugt, so dass das Bodenmaterial aufgelockert und die Loslösung des Schmutzes vereinfacht wird. Gleichzeitig erfährt der eintretende Saugluftstrom an dem scharfen Knick eine starke Umlenkung welche ebenfalls für die Schmutzaufnahme positive Verwirbelungen erzeugt.In this configuration, the elevation according to the invention protrudes into the air-permeable and elastic floor material. Thus, when the vacuum cleaner floor nozzle is moved over the floor material, a variable compression is generated, so that the floor material is loosened and the loosening of the dirt is simplified. At the same time, the incoming suction air flow experiences a strong deflection at the sharp bend, which also creates positive turbulence for the dirt pick-up.

In einer alternativen Ausgestaltung ist der ebene Bereich als Gleitschräge ausgebildet. Hierbei kann es sich insbesondere um eine Aufgleitschräge vor der vorderen Saugmundkante oder eine Abgleitschräge hinter der hinteren Saugmundkante handeln. Dabei weist eine Aufgleitschräge bevorzugt eine Breite zwischen 5 mm und 20 mm, eine Abgleitschräge eine bevorzugte Breite zwischen 15 mm und 40 mm auf. Die Gleitschräge ist in jedem Fall gegenüber der Horizontalen bzw. gegenüber der zu reinigenden Bodenfläche - um einen Winkel zwischen 3° und 20°, insbesondere um 5° bis 10° geneigt.In an alternative embodiment, the flat area is designed as a sliding slope. This can in particular be a slide-on bevel in front of the front suction mouth edge or a slide-off bevel behind the rear suction mouth edge. A slide-on slope preferably has a width between 5 mm and 20 mm, and a slide-on slope has a preferred width between 15 mm and 40 mm. The sliding slope is opposite in each case the horizontal or with respect to the floor surface to be cleaned - inclined by an angle between 3 ° and 20 °, in particular by 5 ° to 10 °.

Mit der erfindungsgemäßen Überhöhung weisen sowohl Saugplateaus auch als Gleitschrägen verbesserte Reinigungseigenschaften auf.With the elevation according to the invention, both suction plateaus and sliding bevels have improved cleaning properties.

Vorzugsweise ist der ebene Bereich als Aussparung der Gleitsohle ausgebildet. Dabei verlaufen in Querrichtung neben dem ebenen Bereich überstehende Abschnitte der Gleitsohle, welche nach unten weiter vorstehen als der ebene Bereich selbst. Insbesondere kann die Überhöhung an ihrem höchsten Punkt dasselbe Niveau erreichen wie der seitliche überstehende Bereich.The flat area is preferably designed as a recess in the sliding sole. In this case, protruding sections of the sliding sole run in the transverse direction next to the flat area, which protrude further downwards than the flat area itself. In particular, the elevation at its highest point can reach the same level as the laterally protruding area.

Besonders bevorzugt ist der Übergang zwischen dem ebenen Bereich und der Überhöhung glatt ausgebildet. Dies bedeutet, dass die Kontur der Überhöhung einer stetig differenzierbaren, vorzugsweise einer 2-fach stetig differenzierbaren Kurve folgt. Kurven dieser Ausgestaltung bilden einen besonders weichen Übergang, welcher zu geringen Schiebewiderständen beim Auftreffen auf Hindernisse führt.The transition between the flat area and the elevation is particularly preferably smooth. This means that the contour of the elevation follows a continuously differentiable curve, preferably a 2-fold continuously differentiable curve. Curves of this configuration form a particularly smooth transition, which leads to low sliding resistance when hitting obstacles.

Die Kontur der Überhöhung kann zumindest abschnittsweise auch linear ausgebildet sein. Besonders bevorzugt unterschreitet die Kontur der Überhöhung einen Krümmungsradius von 1 mm nicht. Auch große Krümmungsradien in den Übergangsbereichen tragen zu einem besonders sanften Übergang bei.The contour of the elevation can also be linear, at least in sections. Particularly preferably, the contour of the elevation does not fall below a radius of curvature of 1 mm. Large radii of curvature in the transition areas also contribute to a particularly smooth transition.

Erfindungsgemäß ist vorgesehen, dass die Maximalhöhe der Überhöhung ein Abstand zur Berandung des Saugmundes von weniger als 1 mm aufweist. Besonders bevorzugt ist die Überhöhung unmittelbar benachbart zur Saugmundkante angeordnet.According to the invention it is provided that the maximum height of the elevation is a distance from the edge of the suction mouth of is less than 1 mm. The elevation is particularly preferably arranged immediately adjacent to the edge of the suction mouth.

In einer alternativen, nicht erfindungsgemäßen, Ausgestaltung ist unmittelbar anschließend an die Berandung des Saugmundes ein Innenplateau mit einer Breite zwischen 1 mm und 3 mm zwischen dem Saugmund und der Überhöhung angeordnet. Das Innenplateau steht nicht über die ebene Fläche über. Vorzugsweise ist es in Arbeitsstellung horizontal ausgerichtet. Zweckmäßigerweise erfolgt der Übergang zwischen der Überhöhung und dem Innenplateau ebenfalls kontinuierlich. Das Innenplateau endet mit der Saugmundkante, welche gleichzeitig die Berandung des Saugmundes bereitstellt. Durch die Überhöhung und die Saugmundkante werden zwei strömungstechnische Widerstände im kurzen Abstand hintereinander geschaltet, was zu einer reinigungstechnisch günstigen Verwirbelung führt.In an alternative embodiment, not according to the invention, an inner plateau with a width between 1 mm and 3 mm is arranged between the suction mouth and the elevation immediately adjacent to the edge of the suction mouth. The inner plateau does not protrude from the flat surface. It is preferably oriented horizontally in the working position. The transition between the elevation and the inner plateau is also expediently continuous. The inner plateau ends with the suction mouth edge, which at the same time provides the edge of the suction mouth. Due to the elevation and the edge of the suction mouth, two flow resistances are connected one behind the other at a short distance, which leads to a turbulence which is favorable in terms of cleaning technology.

Der Bereich der Überhöhung zwischen dem ersten Punkt vom ebenen Bereich ausgehend, an dem die halbe Maximalhöhe erreicht wird, bis zum letzten Punkt vor der Berandung des Saugmundes an dem die halbe maximale Höhe erreicht wird, wird auch als "Kuppe" der Überhöhung bezeichnet. Der Abschnitt zwischen der Kuppe und dem ebenen Bereich bildet den Übergang zwischen dem ebenen Bereich und der Überhöhung.The area of elevation between the first point of the level area, at which half the maximum height is reached, to the last point before the edge of the suction mouth at which half the maximum height is reached, is also referred to as the "crest" of the elevation. The section between the crest and the flat area forms the transition between the flat area and the superelevation.

Bevorzugt nimmt die Steigung der Kontur des Übergangs in Richtung der Saugmundkante monoton, insbesondere streng monoton zu und nimmt im Bereich der Kuppe der Überhöhung monoton, insbesondere streng monoton ab. In einer besonders bevorzugten Ausgestaltung der Erfindung ist die Kuppe der Überhöhung in Form eines Kreisbogensegmentes, insbesondere eines Halbkreises ausgebildet.The gradient of the contour of the transition in the direction of the suction mouth edge preferably increases monotonically, in particular strictly monotonically, and decreases monotonically, in particular strictly monotonically, in the region of the crest of the elevation. In a particularly preferred embodiment of the invention, the summit of the elevation is designed in the form of a circular arc segment, in particular a semicircle.

In einer weiteren bevorzugten Ausgestaltung weist die Kuppe der Überhöhung ein Plateau auf. Das Plateau hat dabei zweckmäßigerweise eine Breite zwischen 0,3 mm und 1 mm.In a further preferred embodiment, the summit of the elevation has a plateau. The plateau expediently has a width between 0.3 mm and 1 mm.

Die Erfindung wird nachfolgend anhand von lediglich Ausführungsbeispiele darstellenden Figuren erläutert. Es zeigen schematisch

Fig. 1
eine Unteransicht einer erfindungsgemäßen Staubsaugerbodendüse,
Fig. 2A
einen teilweisen Schnitt durch die Staubsaugerbodendüse gemäß Fig. 1 entlang einer Linie A-A gemäß einem ersten Ausführungsbeispiel,
Fig. 2B bis 2F
eine Schnittdarstellung entsprechend Fig. 2A bei weiteren Ausführungsformen und
Fig. 3
eine Unteransicht der Staubsaugerbodendüse gemäß der Schnittdarstellung aus Fig. 2F.
The invention is explained below with reference to figures that merely represent exemplary embodiments. It show schematically
Fig. 1
a bottom view of a vacuum cleaner floor nozzle according to the invention,
Figure 2A
a partial section through the vacuum cleaner floor nozzle according to Fig. 1 along a line AA according to a first embodiment,
Figures 2B to 2F
a sectional view accordingly Figure 2A in other embodiments and
Fig. 3
a bottom view of the vacuum cleaner floor nozzle according to the sectional view Figure 2F .

Die Darstellung gemäß Fig. 2C, 2F und 3 liegen nicht im Rahmen der Erfindung, sind jedoch zum besseren Verständnis mit dargestellt.The representation according to Figure 2C , 2F and 3 are not within the scope of the invention, but are shown for better understanding.

In der Fig. 1 ist die Unterseite einer erfindungsgemäßen Staubsaugerbodendüse gemäß einem ersten Ausführungsbeispiel dargestellt. Die Staubsaugerbodendüse weist ein Gehäuse 1 auf, an dem unterseitig eine Gleitsohle 2 angeordnet ist. Innerhalb der Gleitsohle 2 ist ein Saugmund 3 vorgesehen, welcher zur Aufnahme eines Saugluftstromes an eine Saugluftführung angeschlossen ist. Die Saugluftführung umfasst dabei einen in einer Arbeitsrichtung x rückwärtigen Ende des Gehäuses angeschlossenen Anschlussflansch 4 zur Verbindung mit einem Staubsauger auf. Ebenfalls am rückwärtigen Ende des Gehäuses 1 sind zwei Laufrollen 5 zum Abstützen des Gehäuses vorgesehen. Im Ausführungsbeispiel erstreckt sich der Saugmund 3 im Wesentlichen in einer quer zur Arbeitsrichtung x stehenden Querrichtung y. In der dargestellten Unteransicht ist die Berandung 6 des Saugmunds erkennbar, welche den Saugmund 3 begrenzt. Zu den Seiten in Querrichtung y hin ist der Saugmund offen zur Randabsaugung ausgebildet.In the Fig. 1 shows the underside of a vacuum cleaner floor nozzle according to the invention according to a first embodiment. The vacuum cleaner floor nozzle has a housing 1 on which a sliding sole 2 is arranged on the underside. A suction mouth 3 is provided within the sliding sole 2, which is connected to a suction air duct for receiving a suction air stream. The suction air duct comprises a connection flange 4 connected to the rear end of the housing in a working direction x for connection to a vacuum cleaner. Also at the rear end of the housing 1 are two rollers 5 for supporting the housing. In the exemplary embodiment, the suction mouth 3 extends essentially in a transverse direction y that is transverse to the working direction x. In the illustrated bottom view, the border 6 of the suction mouth, which delimits the suction mouth 3, can be seen. On the sides in the transverse direction y, the suction mouth is designed to be open for edge suction.

Die erfindungsgemäße Profilierung der Gleitsohle 2 ist in verschiedenen Ausführungsbeispielen in den Figuren 2A bis 2F am Beispiel der hinteren Saugmundkante 6 dargestellt. Ohne Beschränkung der Erfindung kann die vordere Saugmundkante alternativ oder zusätzlich ebenfalls einen den Figuren 2A bis 2F ähnlichen, in Arbeitsrichtung x gespiegelten Verlauf aufweisen.The profiling of the sliding sole 2 according to the invention is shown in various exemplary embodiments in FIGS Figures 2A to 2F shown using the example of the rear suction mouth edge 6. Without limiting the invention, the front edge of the suction mouth can alternatively or additionally also have one Figures 2A to 2F have a similar course mirrored in the working direction x.

Das in Fig. 2A dargestellte Profil der Gleitsohle einer ersten Ausführungsform ist lediglich ausschnittsweise im Bereich unmittelbar rückwärtig anschließend an den Saugmund 3 dargestellt. Der Saugmund wird dabei lediglich in Form der hinteren Saugmundwand 7, welche im Ausführungsbeispiel einwärts geneigt ist, angedeutet. Die hintere Saugmundwand 7 kann ohne Beschränkung der Erfindung auch senkrecht oder anschließend an den Saugmund auswärts geneigt verlaufen.This in Figure 2A The profile of the sliding sole of a first embodiment shown is shown only in part in the area immediately rearward adjoining the suction mouth 3. The suction mouth is only indicated in the form of the rear suction mouth wall 7, which is inclined inward in the exemplary embodiment. The rear suction mouth wall 7 can without restriction of Invention also run vertically or inclined outwardly adjacent to the suction mouth.

In dem Ausführungsbeispiel ist hinter dem Saugmund 3 ein ebener Bereich 8 in Form eines horizontal verlaufenden Saugplateaus 9 angeordnet. Rückwärtig schließt an das Plateau 9 eine Abgleitschräge 10 mit einem Neigungswinkel α gegenüber der Horizontalen von etwa 7° an.In the exemplary embodiment, a flat area 8 in the form of a horizontally extending suction plateau 9 is arranged behind the suction mouth 3. At the rear, the plateau 9 is followed by a sliding slope 10 with an angle of inclination α relative to the horizontal of approximately 7 °.

Erfindungsgemäß ist zwischen dem ebenen Bereich 8, 9 und dem Saugmund 3 eine Überhöhung 11 angeordnet, welche gegenüber einer Verlängerung 12 des ebenen Bereichs 8, 9 um eine maximale Höhe h von weniger als 2 mm nach unten übersteht. Aus Gründen der Deutlichkeit ist die Überhöhung 11 nicht maßstäblich dargestellt, sondern stark überzeichnet. Die Halbwertsbreite b der Überhöhung 11 ist kleiner als 3 mm, während der Übergangsbereich zwischen der Überhöhung 11 und dem ebenen Bereich 8, 9 eine Breite c von weniger als 10 mm aufweist.According to the invention, an elevation 11 is arranged between the flat area 8, 9 and the suction mouth 3, which protrudes downward from an extension 12 of the flat area 8, 9 by a maximum height h of less than 2 mm. For the sake of clarity, the elevation 11 is not shown to scale, but is greatly exaggerated. The half-width b of the elevation 11 is less than 3 mm, while the transition area between the elevation 11 and the flat area 8, 9 has a width c of less than 10 mm.

Eine weitere, alternative Ausgestaltung ist in Fig. 2B dargestellt. Dort ist der ebene Bereich 9 ohne Saugplateau unmittelbar als Abgleitschräge 10 ausgebildet. Der Aufbau ist sonst im Wesentlichen mit der Ausgestaltung gemäß Fig. 2A identisch.Another, alternative embodiment is in Figure 2B shown. There the flat area 9 without a suction plateau is designed directly as a sliding slope 10. The structure is otherwise essentially with the design according to Figure 2A identical.

Bei der nicht erfindungsgemäßen Variante gemäß Fig. 2C ist im Vergleich zu Fig. 2A zusätzlich ein Innenplateau 13 zwischen der Überhöhung 11 und dem Saugmund 3 mit einer Breite a ausgebildet. Dieses verläuft parallel zur Horizontalen ausgehend von der hinteren Saugmundkante 6 aus.In the variant not according to the invention according to Figure 2C is compared to Figure 2A In addition, an inner plateau 13 is formed between the elevation 11 and the suction mouth 3 with a width a. This runs parallel to the horizontal, starting from the rear edge 6 of the suction mouth.

In der Variante gemäß Fig. 2D ist die Überhöhung 11 zusätzlich mit einem Plateau 14 ausgebildet. Dieses weist eine Breite d von maximal 0,5 mm auf.In the variant according to Figure 2D the elevation 11 is additionally formed with a plateau 14. This has a width d of a maximum of 0.5 mm.

Bei der Ausführungsform gemäß Fig. 2E ist die Kuppe der Überhöhung 11 zwischen den beiden Halbwertspunkten als Kreisbogensegment, konkret als Halbkreisbogen ausgebildet.In the embodiment according to Figure 2E the summit of the elevation 11 between the two half-value points is designed as a circular arc segment, specifically as a semicircular arc.

Eine weitere nicht erfindungsgemäße Variante ist in Fig. 2F dargestellt. Der Querschnitt der Überhöhung 11 entspricht dort im Wesentlichen der Darstellung aus Fig. 2C mit einem Innenplateau 13 sowie einem als Saugplateau 9 ausgebildeten ebenen Bereich 8. Die Besonderheit besteht dabei darin, dass das Saugplateau 9 als Teil einer Aussparung 14 in der Gleitsohle 2 gebildet ist. Die Aussparung wird - wie man einer vergleichenden Betrachtung mit der Fig. 3 entnimmt - derart gebildet, dass neben dem ebenen Bereich 8, 9 seitlich überstehende Abschnitte 15 angeordnet sind, welche zumindest teilweise in Flucht mit der Abgleitschräge 10 liegen. Der höchste Punkt der Überhöhung 11 erreicht dasselbe Niveau wie die seitlich überstehenden Bereiche 15.Another variant not according to the invention is shown in Figure 2F shown. The cross section of the elevation 11 essentially corresponds to the illustration from FIG Figure 2C with an inner plateau 13 and a flat area 8 designed as a suction plateau 9. The special feature here is that the suction plateau 9 is formed as part of a recess 14 in the sliding sole 2. The recess is - as one can compare with the Fig. 3 removes - formed in such a way that laterally protruding sections 15 are arranged next to the flat area 8, 9, which are at least partially in alignment with the sliding bevel 10. The highest point of the elevation 11 reaches the same level as the laterally protruding areas 15.

Claims (13)

  1. A vacuum cleaner floor nozzle comprising a housing (1), a sliding base (2) arranged on the underside of the housing (1), and a suction mouth (3), which is arranged in the sliding base (2) and which extends in a transverse direction (y) and which is limited by a boundary (6), wherein, in a working direction (x), which is perpendicular to the transverse direction (y), the sliding base (2) has a flat region (8) in front of and/or behind the suction mouth (3), wherein, between the flat region (8) and the suction mouth (3), the sliding base (2) has a superelevation (11), which connects continuously to the flat region (8) and which protrudes beyond the extension (12) of the flat region (8), characterized in that the maximum height (h) of the superelevation (11) has a distance of less than 1 mm from the boundary (6) of the suction mouth (3).
  2. The vacuum cleaner floor nozzle according to claim 1, characterized in that the superelevation (11) has a height (h) of less than 2 mm, in particular less than 1. 5 mm.
  3. The vacuum cleaner floor nozzle according to claim 1 or 2, characterized in that the superelevation (11) has a width (d) of less than 3 mm, in particular less than 2
  4. The vacuum cleaner floor nozzle according to one of claims 1 to 3, characterized in that a transition region of the superelevation between the flat region (8) and half of the maximum height of the superelevation (11) has a width (c) of less than 10 mm.
  5. The vacuum cleaner floor nozzle according to one of claims 1 to 4, characterized in that the flat region (8) is formed as suction plateau (9).
  6. The vacuum cleaner floor nozzle according to one of claims 1 to 4, characterized in that the flat region (8) is formed as inclined sliding surface (10).
  7. The vacuum cleaner floor nozzle according to one of claims 1 to 6, characterized in that the flat region (8) is formed as recess (14) within the sliding base (2).
  8. The vacuum cleaner floor nozzle according to one of claims 1 to 7, characterized in that the contour of the superelevation (11) follows a steadily differentiable, preferably a twice steadily differentiable curve.
  9. The vacuum cleaner floor nozzle according to one of claims 1 to 8, characterized in that the contour of the superelevation (11) is formed linearly in sections.
  10. The vacuum cleaner floor nozzle according to one of claims 1 to 9, characterized in that the contour of the superelevation (11) does not exceed a radius of curvature of 1 mm.
  11. The vacuum cleaner floor nozzle according to one of claims 1 to 10, characterized in that the incline of the contour of the transition increases monotonously and decreases monotonously in the region of the tip of the superelevation (11).
  12. The vacuum cleaner floor nozzle according to one of claims 1 to 11, characterized in that the tip of the superelevation (11) is formed to have a semicircular cross section.
  13. The vacuum cleaner floor nozzle according to one of claims 1 to 12, characterized in that the tip of the superelevation (11) has a plateau (14).
EP17203366.4A 2017-11-23 2017-11-23 Floor nozzle for a vacuum cleaner Active EP3488752B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP17203366.4A EP3488752B1 (en) 2017-11-23 2017-11-23 Floor nozzle for a vacuum cleaner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17203366.4A EP3488752B1 (en) 2017-11-23 2017-11-23 Floor nozzle for a vacuum cleaner

Publications (2)

Publication Number Publication Date
EP3488752A1 EP3488752A1 (en) 2019-05-29
EP3488752B1 true EP3488752B1 (en) 2021-12-29

Family

ID=60569587

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17203366.4A Active EP3488752B1 (en) 2017-11-23 2017-11-23 Floor nozzle for a vacuum cleaner

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EP (1) EP3488752B1 (en)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2871046B1 (en) 2004-06-08 2006-07-28 Seb Sa VACUUM SUCKER
DE102007009958B4 (en) * 2007-03-01 2013-08-01 Wessel-Werk Gmbh Sheet-metal sole and method for its design
CN104367268B (en) 2013-08-13 2017-06-16 莱克电气股份有限公司 Modified floor brush of dust collector
DE102014112141B4 (en) * 2014-08-25 2018-04-26 Wessel-Werk Gmbh Suction nozzle for vacuum cleaner
KR20160026269A (en) * 2014-08-29 2016-03-09 삼성전자주식회사 Suction nozzle and vacuum cleaner having the same
CN106889944A (en) * 2015-12-18 2017-06-27 康塔有限公司 Vacuum cleaner head

Also Published As

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EP3488752A1 (en) 2019-05-29

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