EP3639715A1 - Floor nozzle for a vacuum cleaner - Google Patents

Floor nozzle for a vacuum cleaner Download PDF

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Publication number
EP3639715A1
EP3639715A1 EP18200437.4A EP18200437A EP3639715A1 EP 3639715 A1 EP3639715 A1 EP 3639715A1 EP 18200437 A EP18200437 A EP 18200437A EP 3639715 A1 EP3639715 A1 EP 3639715A1
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EP
European Patent Office
Prior art keywords
suction mouth
sliding surface
vacuum cleaner
floor nozzle
working direction
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
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EP18200437.4A
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German (de)
French (fr)
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EP3639715B1 (en
Inventor
Philipp Rath
Klaus-Dieter Riehl
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Wessel Werk GmbH
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Wessel Werk GmbH
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Priority to EP18200437.4A priority Critical patent/EP3639715B1/en
Priority to CN201910855321.2A priority patent/CN111035309B/en
Publication of EP3639715A1 publication Critical patent/EP3639715A1/en
Application granted granted Critical
Publication of EP3639715B1 publication Critical patent/EP3639715B1/en
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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
    • 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

Definitions

  • the invention relates to a vacuum cleaner floor nozzle with a housing extending in a working direction and a perpendicularly extending in the transverse direction and a suction mouth arranged on the underside of the housing and connectable to a suction air guide.
  • the suction mouth extends in the transverse direction over a width and is delimited in the working direction by a front suction mouth edge and a rear suction mouth edge.
  • Vacuum cleaner floor nozzles are used to shape and direct the suction air flow of a vacuum cleaner.
  • the cleaning properties of a vacuum cleaner system are significantly influenced by the design of the vacuum cleaner floor nozzle.
  • the geometrical design of a vacuum cleaner floor nozzle defines the widths of the gaps through which a suction air stream entering the vacuum cleaner is guided along the surface to be cleaned. This results in very specific flow and vacuum conditions, on which the cleaning success depends crucially.
  • the geometry of vacuum cleaner floor nozzles is therefore constantly being optimized to improve the cleaning result on smooth and carpeted floors.
  • adjustable openings can be provided which allow the passage of coarse dirt.
  • additional support elements can also be attached for smooth floors, which can also lift the bristle strips. Both approaches are not transferable to carpets. In carpet operation, the bristle strips are retracted so that the vacuum cleaner floor nozzle rests directly on the textile floor material with its underside designed as a sliding sole. Raising the housing - also through additional support elements - is therefore not possible. Large-area support elements would also have to be provided for effective support on elastic carpets, which in turn could hinder both the suction air flow and the entry of coarse dirt into the vacuum cleaner floor nozzle.
  • the invention is based on the object of improving the coarse dirt suction on carpets without impairing the suction properties with regard to finer dirt particles.
  • the object of the invention and solution to this problem is a vacuum cleaner nozzle according to claim 1.
  • a sliding surface extends in the working direction in front of the front edge of the suction mouth and extends in the transverse direction over at least 75% of the width of the suction mouth extends.
  • the sliding surface In longitudinal section, the sliding surface has a circular arc segment with a radius of curvature between 40 mm and 80 mm.
  • the sliding surface has an extension of at least 15 mm in the working direction.
  • the sliding sole in the immediate vicinity of the front edge of the suction mouth is almost level with only slight differences in height.
  • the already beginning rounding of the circular arc concentrates the contact forces and thus the system obstructing the suction air flow on the immediate area of the edge of the suction mouth.
  • the even curvature of the circular arc forms a sliding surface with which the vacuum cleaner nozzle can slide on larger dirt particles without pushing them in front of it.
  • the coarse dirt particles can thus be run over and thus get into the suction air flow within the suction mouth.
  • a coarse dirt particle enters the increasingly narrow gap between the sliding surface and the floor covering during the phase in which the vacuum cleaner nozzle slides on it.
  • the suction mouth is preferably closed all round. This means that the suction air flow can be applied to the floor covering Only enter the vacuum nozzle via the edges of the suction mouth into the suction mouth.
  • the circular arc segment has a radius of curvature of at least 50 mm, particularly preferably between 60 and 70 mm, in particular approximately 65 mm.
  • the special effect of the circular sliding surface in the preferred parameter ranges is particularly pronounced. If the radius of curvature is too small, there is a sharp transition, so that coarse dirt particles are pushed in front of the vacuum cleaner nozzle without any changes. Too little curvature on the other hand is also impractical, since the front sliding surface becomes very long to produce a sufficient height difference and, on the other hand, air flow between the sliding surfaces and the floor covering is prevented.
  • the slightly curved sliding surface is provided with a particularly large extension in the working direction. At least 20 mm, in particular approximately 22 mm, are preferably advantageous here. This also ensures that very coarse-grained dirt can slide on. The resulting frictional resistances are compensated for by the effect of the air flow flowing in from the front (funnel effect). In a particularly preferred embodiment, there is a height difference of at least 2.5 mm at the front end of the sliding surface in the working direction compared to the front edge of the suction mouth. As a result, the sliding surface is particularly well adapted to the collection of coarse dirt particles of this diameter, for example grains of sand, smaller pebbles or bread crumbs.
  • the sliding surface particularly preferably adjoins the front edge of the suction mouth.
  • the arcuate curvature according to the invention thus begins immediately before the suction mouth.
  • the maximum extension downwards and thus the maximum contact pressure on the carpet is concentrated on the front edge of the suction mouth.
  • a plateau is arranged between the front edge of the suction mouth and the sliding surface, which has an extension in the working direction of between 2 mm and 5 mm. Due to the suction plateau, the sealing of the suction mouth and thus the negative pressure prevailing therein can be increased. This enables better deep cleaning to be achieved.
  • a thread lifter is expediently arranged within the sliding surface.
  • the thread lifter is aligned horizontally and is set back within the contour of the sliding surface.
  • the thread lifter has a textile material, in particular a slanted bristle velor. Threads of the textile material can protrude downwards over the contour of the sliding surface.
  • the thread lifter strip can be used to lift threads and hair lying on the carpet material so that they get into the air currents and at the same time lose their hold on the ground.
  • the sliding surface has only an underside which is circular in longitudinal section.
  • the invention is based on the essential finding that the circular arc shape combines very good properties in the sliding behavior with the funnel effect.
  • the sliding surface can have a linearly longitudinal section at its front end facing away from the front edge of the suction mouth.
  • the sliding surface In the linear area, the sliding surface is not curved, so that the sliding angle is constant there and does not increase any further.
  • the tangent of the circular arc segment at the rear end of the sliding surface facing the front suction mouth edge is particularly preferably in the horizontal direction.
  • the sliding surface can in particular partially have the shape of a cylinder jacket. This is particularly the case when the rear end of the sliding surface lies on a line in the transverse direction and the radius of curvature of the sliding surface is constant over the entire area.
  • the basic structure of the vacuum cleaner floor nozzle is in the Fig. 1 and 2nd recognizable:
  • the vacuum cleaner floor nozzle points in one working direction x and a transverse direction y extending perpendicular thereto and a suction mouth 3 arranged on the underside of the housing 1 and connectable to a suction air guide 2.
  • the suction mouth 3 extends in the transverse direction y over a width B and is delimited in the working direction x by a front suction mouth edge 4 and a rear suction mouth edge 9.
  • a sliding surface 5 is arranged in front of the front suction mouth edge 4, which extends in the transverse direction y over at least 75% of the width B of the suction mouth 3.
  • the sliding surface 5 has the in Figure 3A shown longitudinal section along the working direction x a circular arc segment 6 with a radius of curvature r between 40 mm and 80 mm.
  • the sliding surface 5 extends in the working direction x over a length s of at least 15 mm. How to Fig. 2 can further see, the suction mouth 3 is closed at the edge, so that an inflow of the suction air flow via the front suction mouth edge 4 is favored with the corresponding funnel effect.
  • a thread lifter strip 10 is arranged within the sliding surface 5.
  • the slide-on surface 5 has an underside, which is formed exclusively in the form of a circular arc in longitudinal section.
  • the radius of curvature r is also constant at 65 mm in the entire area of the sliding surface 5.
  • the underside thus forms the shape of part of a cylinder jacket.
  • the front suction mouth edge 4 is straight in the transverse direction y.
  • FIGS Figure 3B and 3C Alternative configurations of the sliding surface 5 are shown in FIGS Figure 3B and 3C shown.
  • a plateau 11 with a width b between 2 mm and 5 mm is arranged between the front suction mouth edge 4 and the sliding surface 5.
  • the plateau 11 also runs within the horizontal plane 8. This is followed by a circular arc segment 6 with a constant radius of curvature on the front in the working direction x.
  • the sliding surface 5 has at its front end 7 facing away from the front suction mouth edge 4 a region 12 which is linear in longitudinal section. This has a length l of at least 3 mm.

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

Abstract

Die Erfindung betrifft eine Staubsaugerdüse mit einem sich in einer Arbeitsrichtung (x) und einer dazu senkrecht stehenden Querrichtung (y) erstreckenden Gehäuse (1) und einem unterseitig an dem Gehäuse (1) angeordneten und an eine Saugluftführung (2) anschließbaren Saugmund (3). Der Saugmund (3) erstreckt sich in der Querrichtung (y) über eine Breite (B) und ist in der Arbeitsrichtung (x) durch eine vordere Saugmundkante (4) und eine hintere Saugmundkante (9) begrenzt. Erfindungsgemäß ist in der Arbeitsrichtung vor der vorderen Saugmundkante (4) eine Aufgleitfläche (5) angeordnet, welche sich in der Querrichtung (y) über zumindest 75 % der Breite (B) des Saugmundes (3) erstreckt. Die Aufgleitfläche (5) weist im Längsschnitt ein Kreisbogensegment (6) mit einem Krümmungsradius (r) zwischen 40 mm und 80 mm auf. Die Aufgleitfläche (5) weist in der Arbeitsrichtung (x) eine Erstreckung (s) von zumindest 15 mm auf.The invention relates to a vacuum cleaner nozzle with a housing (1) extending in a working direction (x) and a transverse direction (y) perpendicular thereto and a suction mouth (3) arranged on the underside of the housing (1) and connectable to a suction air duct (2). . The suction mouth (3) extends in the transverse direction (y) over a width (B) and is limited in the working direction (x) by a front suction mouth edge (4) and a rear suction mouth edge (9). According to the invention, a sliding surface (5) is arranged in the working direction in front of the front suction mouth edge (4), which extends in the transverse direction (y) over at least 75% of the width (B) of the suction mouth (3). In longitudinal section, the sliding surface (5) has a circular arc segment (6) with a radius of curvature (r) between 40 mm and 80 mm. The sliding surface (5) has an extension (s) of at least 15 mm in the working direction (x).

Description

Die Erfindung betrifft eine Staubsaugerbodendüse mit einem sich in einer Arbeitsrichtung und einer dazu senkrecht stehend in Querrichtung erstreckenden Gehäuse und einem unterseitig an dem Gehäuse angeordneten und an eine Saugluftführung anschließbaren Saugmund. Der Saugmund erstreckt sich in der Querrichtung über eine Breite und wird in der Arbeitsrichtung durch eine vordere Saugmundkante und eine hintere Saugmundkante begrenzt.The invention relates to a vacuum cleaner floor nozzle with a housing extending in a working direction and a perpendicularly extending in the transverse direction and a suction mouth arranged on the underside of the housing and connectable to a suction air guide. The suction mouth extends in the transverse direction over a width and is delimited in the working direction by a front suction mouth edge and a rear suction mouth edge.

Staubsaugerbodendüsen dienen dazu, den Saugluftstrom eines Staubsaugers zu formen und zu dirigieren. Durch die Ausgestaltung der Staubsaugerbodendüse werden die Reinigungseigenschaften eines Staubsauger-Systems maßgeblich beeinflusst. So werden durch die geometrische Auslegung einer Staubsaugerbodendüse die Breiten der Spalte festgelegt, durch welche ein in den Staubsauger eintretender Saugluftstrom entlang der zu reinigenden Oberfläche geführt wird. Hierdurch stellen sich ganz spezifische Strömungs- und Unterdruckgegebenheiten ein, von denen der Reinigungserfolg ganz maßgeblich abhängt. Die Geometrie von Staubsaugerbodendüsen wird daher laufend optimiert, um das Reinigungsergebnis auf Glatt- und Teppichböden zu verbessern.Vacuum cleaner floor nozzles are used to shape and direct the suction air flow of a vacuum cleaner. The cleaning properties of a vacuum cleaner system are significantly influenced by the design of the vacuum cleaner floor nozzle. Thus, the geometrical design of a vacuum cleaner floor nozzle defines the widths of the gaps through which a suction air stream entering the vacuum cleaner is guided along the surface to be cleaned. This results in very specific flow and vacuum conditions, on which the cleaning success depends crucially. The geometry of vacuum cleaner floor nozzles is therefore constantly being optimized to improve the cleaning result on smooth and carpeted floors.

Eine weitere Herausforderung bei der Auslegung von Staubsaugerbodendüsen liegt in der Absaugung von Grobschmutz. Hierbei handelt es sich um besonders große Partikel, welche nicht mit dem Saugluftstrom durch die vorgesehenen Spalten hindurchtreten können und sich auch nicht durch textile Bodenbeläge hindurch transportieren lassen. Häufig besteht dabei das Problem, dass Grobschmutzpartikel vor der Staubsaugerbodendüse hergeschoben werden, ohne dabei in den wirksamen Saugluftstrom zu gelangen. Neben der unzureichenden Reinigungswirkung besteht hierbei zusätzlich die Gefahr, dass der Grobschmutz die Oberfläche des Fußbodens beschädigt. Als Hindernis für den Grobschmutz beim Eintritt in das Innere der Staubsaugerbodendüse wirken insbesondere die Borstenleisten zur Umschaltung zwischen Glattboden- und Teppichbodenstellung sowie die vordere Saugmundkante.Another challenge in the design of vacuum cleaner floor nozzles is the extraction of coarse dirt. These are particularly large particles that cannot pass through the gaps provided with the suction air flow and cannot be transported through textile floor coverings. Often there is the problem that coarse dirt particles are pushed in front of the vacuum cleaner floor nozzle without getting into the effective suction air flow. In addition to the inadequate cleaning effect, there is also the risk that the coarse dirt damaged the surface of the floor. In particular, the bristle strips for switching between smooth floor and carpeted positions and the front edge of the suction mouth act as an obstacle to coarse dirt when entering the interior of the vacuum cleaner floor nozzle.

In Bezug auf die verstellbaren Borstenleisten sind bereits Lösungen bekannt. Beispielsweise können darin verstellbare Öffnungen vorgesehen sein, welche den Durchtritt von Grobschmutz erlauben. Alternativ oder zusätzlich können für Glattböden auch zusätzliche Stützelemente angebracht werden, welche die Borstenleisten mit anheben können. Beide Ansätze sind für Teppichböden nicht übertragbar. Im Teppichbodenbetrieb sind die Borstenleisten eingefahren, so dass die Staubsaugerbodendüse mit ihrer als Gleitsohle ausgebildeten Unterseite unmittelbar auf dem textilen Bodenmaterial aufliegt. Ein Anheben des Gehäuses - auch durch zusätzliche Stützelemente - verbietet sich daher. Auch müssten für eine wirksame Abstützung auf elastischen Teppichböden großflächige Stützelemente vorgesehen sein, welche ihrerseits sowohl den Saugluftstrom als auch den Eintritt von Grobschmutz in die Staubsaugerbodendüse behindern könnten.Solutions are already known with regard to the adjustable bristle strips. For example, adjustable openings can be provided which allow the passage of coarse dirt. Alternatively or additionally, additional support elements can also be attached for smooth floors, which can also lift the bristle strips. Both approaches are not transferable to carpets. In carpet operation, the bristle strips are retracted so that the vacuum cleaner floor nozzle rests directly on the textile floor material with its underside designed as a sliding sole. Raising the housing - also through additional support elements - is therefore not possible. Large-area support elements would also have to be provided for effective support on elastic carpets, which in turn could hinder both the suction air flow and the entry of coarse dirt into the vacuum cleaner floor nozzle.

Vor diesem Hintergrund liegt der Erfindung die Aufgabe zugrunde, die Grobschmutzabsaugung auf Teppichböden zu verbessern, ohne dabei die Saugeigenschaften in Bezug auf feinere Schmutzpartikel zu verschlechtern.Against this background, the invention is based on the object of improving the coarse dirt suction on carpets without impairing the suction properties with regard to finer dirt particles.

Gegenstand der Erfindung und Lösung dieser Aufgabe ist eine Staubsaugerdüse nach Patentanspruch 1.The object of the invention and solution to this problem is a vacuum cleaner nozzle according to claim 1.

Ausgehend von der gattungsgemäßen Staubsaugerbodendüse erstreckt sich erfindungsgemäß in der Arbeitsrichtung vor der vorderen Saugmundkante eine Aufgleitfläche, welche sich in der Querrichtung über zumindest 75 % der Breite des Saugmundes erstreckt. Die Aufgleitfläche weist im Längsschnitt ein Kreisbogensegment mit einem Krümmungsradius zwischen 40 mm und 80 mm auf. In der Arbeitsrichtung weist die Aufgleitfläche eine Erstreckung von zumindest 15 mm auf. Im Rahmen der erfindungsgemäßen Parameterauswahl ist es möglich, ein gleichermaßen gutes Saugergebnis auf Teppichböden für Grobschmutzpartikel an der Fußbodenoberseite und auch für im Teppich eingelagerte feinere Staubpartikel zu gewährleisten. Die erfindungsgemäße Profilierung des vorderen Aufgleitbereiches führt dazu, dass die vordere Saugmundkante auf dem Teppichboden aufliegt. In Folge der Kreisbogenform ist die Gleitsohle in unmittelbarer Nähe zur vorderen Saugmundkante nahezu eben mit geringen Höhenunterschieden ausgebildet. Gleichzeitig konzentriert die bereits einsetzende Rundung des Kreisbogens die Auflagekräfte und damit die den Saugluftstrom behindernde Anlage auf den unmittelbaren Bereich der Saugmundkante. Davor bildet die gleichmäßige Krümmung des Kreisbogens eine Aufgleitfläche, mit der die Staubsaugerdüse auch an größeren Schmutzpartikeln aufgleiten kann, ohne diese vor sich herzuschieben. Die Grobschmutzpartikel können somit überfahren werden und gelangen dadurch in den Saugluftstrom innerhalb des Saugmundes. Zusätzlich gelangt ein Grobschmutzpartikel in der Phase, in der die Staubsaugerdüse daran aufgleitet, in den zunehmend enger werdenden Spalt zwischen der Aufgleitfläche und dem Bodenbelag. In diesen Spalt ist auch eine Anströmung des Saugluftstromes zu beobachten, welche mit zunehmender Nähe zur Saugmundkante an Geschwindigkeit gewinnt. Hierdurch wird der Grobschmutzpartikel zusätzlich in Richtung der Saugmundkante geleitet und das Aufgleiten vereinfacht. Dies wird auch als "Trichtereffekt" bezeichnet.Starting from the generic vacuum cleaner floor nozzle, according to the invention, a sliding surface extends in the working direction in front of the front edge of the suction mouth and extends in the transverse direction over at least 75% of the width of the suction mouth extends. In longitudinal section, the sliding surface has a circular arc segment with a radius of curvature between 40 mm and 80 mm. The sliding surface has an extension of at least 15 mm in the working direction. Within the scope of the parameter selection according to the invention, it is possible to ensure an equally good suction result on carpets for coarse dirt particles on the top of the floor and also for finer dust particles embedded in the carpet. The profiling of the front sliding area according to the invention leads to the front suction mouth edge resting on the carpet. As a result of the circular arc shape, the sliding sole in the immediate vicinity of the front edge of the suction mouth is almost level with only slight differences in height. At the same time, the already beginning rounding of the circular arc concentrates the contact forces and thus the system obstructing the suction air flow on the immediate area of the edge of the suction mouth. In front of it, the even curvature of the circular arc forms a sliding surface with which the vacuum cleaner nozzle can slide on larger dirt particles without pushing them in front of it. The coarse dirt particles can thus be run over and thus get into the suction air flow within the suction mouth. In addition, a coarse dirt particle enters the increasingly narrow gap between the sliding surface and the floor covering during the phase in which the vacuum cleaner nozzle slides on it. An inflow of the suction air flow can also be observed in this gap, which increases in speed with increasing proximity to the edge of the suction mouth. As a result, the coarse dirt particle is additionally directed towards the edge of the suction mouth and the sliding on is simplified. This is also known as the "funnel effect".

Zur Verstärkung des Trichtereffekts ist der Saugmund vorzugsweise umlaufend geschlossen. Somit kann der Saugluftstrom bei einer auf dem Bodenbelag anliegenden Staubsaugerdüse ausschließlich über die Saugmundkanten in den Saugmund eintreten.To enhance the funnel effect, the suction mouth is preferably closed all round. This means that the suction air flow can be applied to the floor covering Only enter the vacuum nozzle via the edges of the suction mouth into the suction mouth.

In einer bevorzugten Ausgestaltung weist das Kreisbogensegment einen Krümmungsradius von zumindest 50 mm, besonders bevorzugt zwischen 60 und 70 mm, insbesondere etwa 65 mm auf. Im Rahmen der vorliegenden Erfindung hat sich gezeigt, dass die besondere Wirkung der kreisbogenförmigen vorderen Aufgleitfläche in den bevorzugten Parameterbereichen besonders stark ausgeprägt ist. Bei einem zu geringen Krümmungsradius entsteht ein scharfer Übergang, so dass Grobschmutzpartikel vor der Staubsaugerdüse unverändert hergeschoben werden. Eine zu geringe Krümmung auf der anderen Seite ist ebenfalls unpraktisch, da die vordere Gleitfläche zur Herstellung einer ausreichenden Höhendifferenz sehr lang wird und andererseits eine Luftströmung zwischen der Aufgleitflächen und dem Bodenbelag unterbunden wird.In a preferred embodiment, the circular arc segment has a radius of curvature of at least 50 mm, particularly preferably between 60 and 70 mm, in particular approximately 65 mm. In the context of the present invention, it has been shown that the special effect of the circular sliding surface in the preferred parameter ranges is particularly pronounced. If the radius of curvature is too small, there is a sharp transition, so that coarse dirt particles are pushed in front of the vacuum cleaner nozzle without any changes. Too little curvature on the other hand is also impractical, since the front sliding surface becomes very long to produce a sufficient height difference and, on the other hand, air flow between the sliding surfaces and the floor covering is prevented.

In einer besonders bevorzugten Ausgestaltung wird die gering gekrümmte Aufgleitfläche mit einer besonders großen Erstreckung in der Arbeitsrichtung versehen. Vorzugsweise sind hierbei zumindest 20 mm, insbesondere etwa 22 mm von Vorteil. Somit kann auch ein Aufgleiten an sehr grobkörnigem Schmutz gewährleistet werden. Die hierbei auftretenden Reibungswiderstände werden durch die Wirkung des von vorne anströmenden Luftstromes (Trichtereffekt) kompensiert. In einer besonders bevorzugten Ausgestaltung besteht an dem in der Arbeitsrichtung vorderen Ende der Aufgleitfläche eine Höhendifferenz von zumindest 2,5 mm gegenüber der vorderen Saugmundkante. Hierdurch ist die Aufgleitfläche besonders gut an das Aufsammeln von Grobschmutzpartikeln dieses Durchmessers, beispielsweise Sandkörner, kleinere Kieselsteine oder Brotkrümel angepasst.In a particularly preferred embodiment, the slightly curved sliding surface is provided with a particularly large extension in the working direction. At least 20 mm, in particular approximately 22 mm, are preferably advantageous here. This also ensures that very coarse-grained dirt can slide on. The resulting frictional resistances are compensated for by the effect of the air flow flowing in from the front (funnel effect). In a particularly preferred embodiment, there is a height difference of at least 2.5 mm at the front end of the sliding surface in the working direction compared to the front edge of the suction mouth. As a result, the sliding surface is particularly well adapted to the collection of coarse dirt particles of this diameter, for example grains of sand, smaller pebbles or bread crumbs.

Besonders bevorzugt schließt die Aufgleitfläche unmittelbar an die vordere Saugmundkante an. Somit setzt die erfindungsgemäße kreisbogenförmige Krümmung unmittelbar vor dem Saugmund ein. Die maximale Erstreckung nach unten und somit der maximale Anpressdruck auf dem Teppichboden liegt somit konzentriert an der vorderen Saugmundkante an.The sliding surface particularly preferably adjoins the front edge of the suction mouth. The arcuate curvature according to the invention thus begins immediately before the suction mouth. The maximum extension downwards and thus the maximum contact pressure on the carpet is concentrated on the front edge of the suction mouth.

In einer alternativen Ausgestaltung ist zwischen der vorderen Saugmundkante und der Aufgleitfläche ein Plateau angeordnet, welches in der Arbeitsrichtung eine Erstreckung zwischen 2 mm und 5 mm aufweist. Durch das Saugplateau kann die Abdichtung des Saugmundes und damit der darin herrschende Unterdruck vergrößert werden. Hierdurch kann eine bessere Tiefenreinigung erzielt werden.In an alternative embodiment, a plateau is arranged between the front edge of the suction mouth and the sliding surface, which has an extension in the working direction of between 2 mm and 5 mm. Due to the suction plateau, the sealing of the suction mouth and thus the negative pressure prevailing therein can be increased. This enables better deep cleaning to be achieved.

Zweckmäßigerweise ist innerhalb der Aufgleitfläche ein Fadenheber angeordnet. Der Fadenheber ist dabei waagerechet ausgerichtet und innerhalb der Kontur der Aufgleitfläche zurückgesetzt angeordnet. Der Fadenheber weist ein textiles Material, insbesondere ein Schrägborstenvelours auf. Fäden des textilen Materials können über die Kontur der Aufgleitfläche nach unten vorstehen. Mittels des Fadenheberstreifens können auf dem Teppichmaterial aufliegende Fäden und Haare angehoben werden, so dass diese in die Luftströmungen gelangen und gleichzeitig den Halt am Untergrund verlieren.A thread lifter is expediently arranged within the sliding surface. The thread lifter is aligned horizontally and is set back within the contour of the sliding surface. The thread lifter has a textile material, in particular a slanted bristle velor. Threads of the textile material can protrude downwards over the contour of the sliding surface. The thread lifter strip can be used to lift threads and hair lying on the carpet material so that they get into the air currents and at the same time lose their hold on the ground.

In einer besonders bevorzugten Ausgestaltung weist die Aufgleitfläche ausschließlich eine im Längsschnitt kreisbogenförmige Unterseite auf. Die Erfindung basiert auf der wesentlichen Erkenntnis, dass die Kreisbogenform sehr gute Eigenschaften beim Aufgleitverhalten mit dem Trichtereffekt vereint.In a particularly preferred embodiment, the sliding surface has only an underside which is circular in longitudinal section. The invention is based on the essential finding that the circular arc shape combines very good properties in the sliding behavior with the funnel effect.

Alternativ kann die Aufgleitfläche an ihren der vorderen Saugmundkante abgewandten vorderen Ende einen im Längsschnitt linearen Bereich aufweisen. In dem linearen Bereich ist die Aufgleitfläche nicht gekrümmt, so dass der Aufgleitwinkel dort konstant ist und nicht weiter ansteigt.Alternatively, the sliding surface can have a linearly longitudinal section at its front end facing away from the front edge of the suction mouth. In In the linear area, the sliding surface is not curved, so that the sliding angle is constant there and does not increase any further.

Besonders bevorzugt verläuft die Tangente des Kreisbogensegmentes an dem hinteren, der vorderen Saugmundkante zugewandten Ende der Aufgleitfläche in der Horizontalrichtung.The tangent of the circular arc segment at the rear end of the sliding surface facing the front suction mouth edge is particularly preferably in the horizontal direction.

Im Rahmen der Erfindung kann die Aufgleitfläche insbesondere teilweise die Form eines Zylindermantels aufweisen. Dies ist insbesondere dann der Fall, wenn das hintere Ende der Aufgleitfläche in der Querrichtung auf einer Linie liegt und der Krümmungsradius der Aufgleitfläche im gesamten Bereich konstant ist.In the context of the invention, the sliding surface can in particular partially have the shape of a cylinder jacket. This is particularly the case when the rear end of the sliding surface lies on a line in the transverse direction and the radius of curvature of the sliding surface is constant over the entire area.

Die Erfindung wird nachfolgend anhand von lediglich ein Ausführungsbeispiel darstellenden Zeichnungen erläutert. Es zeigt dabei schematisch:

Fig. 1
eine Seitenansicht einer erfindungsgemäßen Staubsaugerdüse gemäß eines ersten Ausführungsbeispiels,
Fig. 2
Unteransicht der Staubsaugerdüse gemäß Fig. 1,
Fig. 3A
einen Längsmittenschnitt durch die Staubsaugerdüse der Fig. 1 und 2 und
Fig. 3B bis 3C
eine Darstellung gemäß Fig. 3A bei weiteren Ausführungsbeispielen.
The invention is explained below on the basis of drawings showing only one exemplary embodiment. It shows schematically:
Fig. 1
a side view of a vacuum cleaner nozzle according to the invention according to a first embodiment,
Fig. 2
Bottom view of the vacuum cleaner nozzle according to Fig. 1 ,
Figure 3A
a longitudinal center section through the vacuum cleaner nozzle Fig. 1 and 2nd and
3B to 3C
a representation according to Figure 3A in further embodiments.

Der grundsätzliche Aufbau der Staubsaugerbodendüse ist in den Fig. 1 und 2 erkennbar: Die Staubsaugerbodendüse weist ein sich in einer Arbeitsrichtung x und einer dazu senkrecht stehenden Querrichtung y erstreckendes Gehäuse 1 und einen unterseitig an dem Gehäuse 1 angeordneten und an eine Saugluftführung 2 anschließbaren Saugmund 3 auf. Der Saugmund 3 erstreckt sich in der Querrichtung y über eine Breite B und wird in der Arbeitsrichtung x durch eine vordere Saugmundkante 4 und eine hintere Saugmundkante 9 begrenzt.The basic structure of the vacuum cleaner floor nozzle is in the Fig. 1 and 2nd recognizable: The vacuum cleaner floor nozzle points in one working direction x and a transverse direction y extending perpendicular thereto and a suction mouth 3 arranged on the underside of the housing 1 and connectable to a suction air guide 2. The suction mouth 3 extends in the transverse direction y over a width B and is delimited in the working direction x by a front suction mouth edge 4 and a rear suction mouth edge 9.

Erfindungsgemäß ist vor der vorderen Saugmundkante 4 eine Aufgleitfläche 5 angeordnet, welche sich in der Querrichtung y über zumindest 75 % der Breite B des Saugmundes 3 erstreckt. Die Aufgleitfläche 5 weist in dem in Fig. 3A dargestellten Längsschnitt entlang der Arbeitsrichtung x ein Kreisbogensegment 6 mit einem Krümmungsradius r zwischen 40 mm und 80 mm auf. In der Arbeitsrichtung x erstreckt sich die Aufgleitfläche 5 über eine Länge s von zumindest 15 mm. Wie man der Fig. 2 ferner entnehmen kann, ist der Saugmund 3 randgeschlossen, so dass eine Einströmung des Saugluftstromes über die vordere Saugmundkante 4 mit dem entsprechenden Trichtereffekt begünstigt wird.According to the invention, a sliding surface 5 is arranged in front of the front suction mouth edge 4, which extends in the transverse direction y over at least 75% of the width B of the suction mouth 3. The sliding surface 5 has the in Figure 3A shown longitudinal section along the working direction x a circular arc segment 6 with a radius of curvature r between 40 mm and 80 mm. The sliding surface 5 extends in the working direction x over a length s of at least 15 mm. How to Fig. 2 can further see, the suction mouth 3 is closed at the edge, so that an inflow of the suction air flow via the front suction mouth edge 4 is favored with the corresponding funnel effect.

In der Fig. 3A ist ferner zu sehen, dass an dem in der Arbeitsrichtung x vorderen Ende 7 der Aufgleitfläche 5 eine Höhendifferenz h von zumindest 2,5 mm zur vorderen Saugmundkante 4 besteht. Bei dem in Fig. 3A gezeigten Ausführungsbeispiel schließt die Aufgleitfläche 5 unmittelbar an die vordere Saugmundkante 4 an. Dabei verläuft die Tangente an das Kreisbogensegment 6 in dem in der Arbeitsrichtung x hinteren Ende der Aufgleitfläche 5 welches die vordere Saugmundkante 4 bildet in der Horizontalen 8. Die Horizontale 8 entspricht der kräftefreien Auflage des Gehäuses 1 auf einen Teppichbodenbelag, wobei sowohl die vordere Saugmundkante 4 als auch die hintere Saugmundkante 9 mit dem Bodenbelag in Kontakt stehen.In the Figure 3A it can also be seen that there is a height difference h of at least 2.5 mm from the front suction mouth edge 4 at the front end 7 of the sliding surface 5 in the working direction x. At the in Figure 3A The exemplary embodiment shown connects the sliding surface 5 directly to the front edge 4 of the suction mouth. The tangent to the circular arc segment 6 runs in the horizontal 8 in the working direction x rear end of the sliding surface 5 which forms the front suction mouth edge 4. The horizontal 8 corresponds to the force-free support of the housing 1 on a carpet flooring, both the front suction mouth edge 4 as well as the rear suction mouth edge 9 are in contact with the floor covering.

Den Fig. 2 und 3A ist ferner zu entnehmen, dass innerhalb der Aufgleitfläche 5 ein Fadenheberstreifen 10 angeordnet ist. In dem gezeigten Ausführungsbeispiel weist die Aufgleitfläche 5 eine Unterseite auf, welche im Längsschnitt ausschließlich kreisbogenförmig ausgebildet ist. Auch ist der Krümmungsradius r im gesamten Bereich der Aufgleitfläche 5 konstant bei 65 mm. Somit bildet die Unterseite die Gestalt eines Teils eines Zylindermantels. Gemäß Fig. 2 ist die vordere Saugmundkante 4 in der Querrichtung y gerade ausgebildet.The Fig. 2 and 3A it can also be seen that a thread lifter strip 10 is arranged within the sliding surface 5. In the exemplary embodiment shown, the slide-on surface 5 has an underside, which is formed exclusively in the form of a circular arc in longitudinal section. The radius of curvature r is also constant at 65 mm in the entire area of the sliding surface 5. The underside thus forms the shape of part of a cylinder jacket. According to Fig. 2 the front suction mouth edge 4 is straight in the transverse direction y.

Alternative Ausgestaltungen der Aufgleitfläche 5 sind in den Fig. 3B und 3C dargestellt. Gemäß Fig. 3B ist zwischen der vorderen Saugmundkante 4 und der Aufgleitfläche 5 ein Plateau 11 mit einer Breite b zwischen 2 mm und 5 mm angeordnet. Das Plateau 11 verläuft dabei ebenfalls innerhalb der Horizontalebene 8. Hieran schließt in der Arbeitsrichtung x vorderseitig ein Kreisbogensegment 6 mit konstantem Krümmungsradius an.Alternative configurations of the sliding surface 5 are shown in FIGS Figure 3B and 3C shown. According to Figure 3B a plateau 11 with a width b between 2 mm and 5 mm is arranged between the front suction mouth edge 4 and the sliding surface 5. The plateau 11 also runs within the horizontal plane 8. This is followed by a circular arc segment 6 with a constant radius of curvature on the front in the working direction x.

In einer weiteren alternativen Ausgestaltung gemäß Fig. 3C weist die Aufgleitfläche 5 an ihren der vorderen Saugmundkante 4 abgewandten vorderen Ende 7 einen im Längsschnitt linearen Bereich 12 auf. Dieser hat eine Länge l von zumindest 3 mm.In a further alternative embodiment according to Figure 3C the sliding surface 5 has at its front end 7 facing away from the front suction mouth edge 4 a region 12 which is linear in longitudinal section. This has a length l of at least 3 mm.

Claims (9)

Staubsaugerbodendüse mit einem sich in einer Arbeitsrichtung (x) und einer dazu senkrecht stehenden Querrichtung (y) erstreckenden Gehäuse (1) und einem unterseitig an dem Gehäuse (1) angeordneten und an eine Saugluftführung (2) anschließbaren Saugmund (3), welcher sich in der Querrichtung (y) über eine Breite (B) erstreckt und in der Arbeitsrichtung (x) durch eine vordere Saugmundkante (4) und eine hintere Saugmundkante (4) begrenzt wird, dadurch gekennzeichnet, dass in der Arbeitsrichtung vor der vorderen Saugmundkante (4) eine Aufgleitfläche (5) angeordnet ist, welche sich in der Querrichtung (y) über zumindest 75 % der Breite (B) des Saugmundes (3) erstreckt, dass die Aufgleitfläche (5) im Längsschnitt ein Kreisbogensegment (6) mit einem Krümmungsradius (r) zwischen 40 mm und 80 mm aufweist und dass die Aufgleitfläche (5) in der Arbeitsrichtung (x) eine Erstreckung (s) von zumindest 15 mm aufweist.Vacuum cleaner floor nozzle with a housing (1) extending in a working direction (x) and a transverse direction (y) perpendicular to it and a suction mouth (3) which is arranged on the underside of the housing (1) and can be connected to a suction air duct (2) the transverse direction (y) extends over a width (B) and is delimited in the working direction (x) by a front suction mouth edge (4) and a rear suction mouth edge (4), characterized in that in the working direction in front of the front suction mouth edge (4) a sliding surface (5) is arranged which extends in the transverse direction (y) over at least 75% of the width (B) of the suction mouth (3), that the sliding surface (5) in longitudinal section is a circular arc segment (6) with a radius of curvature (r ) has between 40 mm and 80 mm and that the sliding surface (5) has an extension (s) of at least 15 mm in the working direction (x). Staubsaugerbodendüse nach Anspruch 1, dadurch gekennzeichnet, dass das Kreisbogensegment (6) einen Krümmungsradius (r) zwischen 60 mm und 70 mm, insbesondere etwa 65 mm aufweist.Vacuum cleaner floor nozzle according to claim 1, characterized in that the circular arc segment (6) has a radius of curvature (r) between 60 mm and 70 mm, in particular about 65 mm. Staubsaugerbodendüse nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Aufgleitfläche (5) in der Arbeitsrichtung (x) eine Erstreckung (s) von zumindest 20 mm, insbesondere etwa 22 mm aufweist.Vacuum cleaner floor nozzle according to claim 1 or 2, characterized in that the sliding surface (5) in the working direction (x) has an extension (s) of at least 20 mm, in particular about 22 mm. Staubsaugerbodendüse nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass an dem in der Arbeitsrichtung (x) vorderen Ende (8) der Aufgleitfläche (5) eine Höhendifferenz (h) von zumindest 2,5 mm zur vorderen Saugmundkante (4) besteht.Vacuum cleaner floor nozzle according to one of claims 1 to 3, characterized in that at the front end (8) of the sliding surface (5) in the working direction (x) there is a height difference (h) of at least 2.5 mm to the front edge of the suction mouth (4). Staubsaugerbodendüse nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Aufgleitfläche (5) unmittelbar an die vordere Saugmundkante (4) anschließt.Vacuum cleaner floor nozzle according to one of claims 1 to 4, characterized in that the sliding surface (5) directly adjoins the front edge of the suction mouth (4). Staubsaugerbodendüse nach Anspruch 1 bis 4, dadurch gekennzeichnet, dass zwischen der vorderen Saugmundkante (4) und der Aufgleitfläche (5) ein Plateau (11) angeordnet ist, welches in der Arbeitsrichtung (x) eine Erstreckung (s) zwischen 2 mm und 5 mm aufweist.Vacuum cleaner floor nozzle according to claim 1 to 4, characterized in that a plateau (11) is arranged between the front suction mouth edge (4) and the sliding surface (5), which has an extension (s) between 2 mm and 5 mm in the working direction (x) having. Staubsaugerbodendüse nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass innerhalb der Aufgleitfläche (5) ein Fadenheber (10) angeordnet ist.Vacuum cleaner floor nozzle according to one of claims 1 to 6, characterized in that a thread lifter (10) is arranged within the sliding surface (5). Staubsaugerbodendüse nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Aufgleitfläche (5) ausschließlich eine im Längsschnitt kreisbogenförmige Unterseite aufweist.Vacuum cleaner floor nozzle according to one of claims 1 to 7, characterized in that the sliding surface (5) has only an underside which is circular in longitudinal section. Staubsaugerbodendüse nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Aufgleitfläche (5) an ihrem der vorderen Saugmundkante (4) abgewandten vorderen Ende (7) einen im Längsschnitt linearen Bereich (12) aufweist.Vacuum cleaner floor nozzle according to one of Claims 1 to 7, characterized in that the sliding surface (5) has a region (12) which is linear in longitudinal section at its front end (7) facing away from the front edge of the suction mouth (4).
EP18200437.4A 2018-10-15 2018-10-15 Floor nozzle for a vacuum cleaner Active EP3639715B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP18200437.4A EP3639715B1 (en) 2018-10-15 2018-10-15 Floor nozzle for a vacuum cleaner
CN201910855321.2A CN111035309B (en) 2018-10-15 2019-09-11 Floor nozzle of dust collector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18200437.4A EP3639715B1 (en) 2018-10-15 2018-10-15 Floor nozzle for a vacuum cleaner

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EP3639715A1 true EP3639715A1 (en) 2020-04-22
EP3639715B1 EP3639715B1 (en) 2023-04-19

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4311464A1 (en) * 2022-07-29 2024-01-31 Seb S.A. Suction head comprising a sole provided with a curved front sliding surface

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Publication number Priority date Publication date Assignee Title
JPS5539091U (en) * 1978-09-08 1980-03-13
DE4243244A1 (en) * 1992-12-19 1994-06-23 Miele & Cie Floor nozzle with running wheels for vacuum cleaner
EP2433538A1 (en) * 2010-09-24 2012-03-28 Seb S.A. Suction nozzle sliding base plate of a vacuum cleaner
GB2559994A (en) * 2017-02-23 2018-08-29 Tti Macao Commercial Offshore Ltd An accessory tool for a surface cleaning apparatus

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Publication number Priority date Publication date Assignee Title
DE102015101019A1 (en) * 2015-01-23 2016-07-28 Wessel-Werk Gmbh Plastic sliding sole for a vacuum cleaner nozzle
EP3257417B1 (en) * 2016-06-14 2023-06-14 Wessel-Werk GmbH Vacuum cleaner jet
EP3500145B1 (en) * 2016-08-22 2021-10-06 Alfred Kärcher SE & Co. KG Floor nozzle for a vacuum cleaner, method for suctioning textile surfaces and vacuum cleaner

Patent Citations (4)

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Publication number Priority date Publication date Assignee Title
JPS5539091U (en) * 1978-09-08 1980-03-13
DE4243244A1 (en) * 1992-12-19 1994-06-23 Miele & Cie Floor nozzle with running wheels for vacuum cleaner
EP2433538A1 (en) * 2010-09-24 2012-03-28 Seb S.A. Suction nozzle sliding base plate of a vacuum cleaner
GB2559994A (en) * 2017-02-23 2018-08-29 Tti Macao Commercial Offshore Ltd An accessory tool for a surface cleaning apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4311464A1 (en) * 2022-07-29 2024-01-31 Seb S.A. Suction head comprising a sole provided with a curved front sliding surface
FR3138289A1 (en) * 2022-07-29 2024-02-02 Seb S.A. Suction head comprising a sole equipped with a curved front sliding surface

Also Published As

Publication number Publication date
EP3639715B1 (en) 2023-04-19
CN111035309A (en) 2020-04-21
CN111035309B (en) 2022-09-06

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