EP2772174B1 - Vacuum cleaner suction tube - Google Patents

Vacuum cleaner suction tube Download PDF

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Publication number
EP2772174B1
EP2772174B1 EP14157105.9A EP14157105A EP2772174B1 EP 2772174 B1 EP2772174 B1 EP 2772174B1 EP 14157105 A EP14157105 A EP 14157105A EP 2772174 B1 EP2772174 B1 EP 2772174B1
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EP
European Patent Office
Prior art keywords
vacuum cleaner
cleaner suction
latching
suction tube
projection
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.)
Active
Application number
EP14157105.9A
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German (de)
French (fr)
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EP2772174A2 (en
EP2772174A3 (en
Inventor
Martin Cordes
Stephan Cordes
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fischer Rohrtechnik GmbH
Original Assignee
Fischer Rohrtechnik GmbH
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Publication date
Application filed by Fischer Rohrtechnik GmbH filed Critical Fischer Rohrtechnik GmbH
Priority to SI201431643T priority Critical patent/SI2772174T1/en
Publication of EP2772174A2 publication Critical patent/EP2772174A2/en
Publication of EP2772174A3 publication Critical patent/EP2772174A3/en
Application granted granted Critical
Publication of EP2772174B1 publication Critical patent/EP2772174B1/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
    • A47L9/24—Hoses or pipes; Hose or pipe couplings
    • A47L9/242—Hose or pipe couplings
    • 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
    • A47L9/24—Hoses or pipes; Hose or pipe couplings
    • A47L9/248—Parts, details or accessories of hoses or pipes

Definitions

  • the invention relates to a vacuum cleaner suction pipe, with at least one locking projection, the locking projection being formed in an end region of the vacuum cleaner suction tube, and wherein the locking projection is formed from the material of the vacuum cleaner suction tube.
  • Vacuum cleaner suction pipes are known in the prior art in a variety of configurations.
  • Vacuum cleaner suction pipes are often made of a stainless steel, with attachment elements, for example made of plastic, being attached at least in the two end regions of a vacuum cleaner suction pipe.
  • the add-on elements are advantageously pushed onto the vacuum cleaner suction pipe or pushed into the vacuum cleaner suction pipe. A particular requirement is the leak-free seal between the vacuum cleaner suction pipe and the add-on element.
  • the WO 02/00087 A1 shows a plug-in vacuum cleaner pipe arrangement with a tubular nozzle socket, a sleeve part and a pipe insertion end of a suction pipe.
  • a tongue-like component is used to lock the parts together.
  • a resilient locking body with a conical cross section is provided, which can engage in recesses in the nozzle socket and the pipe insertion end in order to securely connect them to one another.
  • a stop is provided on the nozzle socket, which corresponds to a longitudinal bead at the pipe insertion end, which is guided through a groove in the socket part.
  • the vacuum cleaner suction pipes known from the prior art often have the disadvantage that a reliable seal, in particular when certain plastics are used for the attachment elements, cannot be adequately ensured between the vacuum cleaner suction pipe and the attachment element.
  • the invention is therefore based on the object of specifying a vacuum cleaner suction tube which is reliable and allows a leak-free connection to an add-on element when using any type of plastic for the add-on element.
  • the aforementioned task is first and essentially achieved in a vacuum cleaner suction pipe according to the invention in that the latching projection is formed on the outside, starting from the central axis of the vacuum cleaner suction pipe, in that the latching projection has a latching edge, that the latching edge lies in a plane whose plane normal is the central axis of the vacuum cleaner suction pipe, and that the latching edge is arranged on the side of the latching projection facing away from the end region.
  • the vacuum cleaner suction pipe consequently has in an end region, preferably in the end region oriented on the bottom in the state of use, for fastening, for example, an add-on element, for. B. a nozzle or a nozzle, at least one locking projection which is formed from the material of the vacuum cleaner suction pipe.
  • the material of the vacuum cleaner suction pipe is preferably brought into the shape of the locking projection by local plastic deformation.
  • the locking projection is consequently formed in the direction away from the central axis of the vacuum cleaner suction tube.
  • the latching projection which is formed on the outside, consequently increases the outer circumference of the vacuum cleaner suction pipe in the region of the latching projection.
  • the latching projection is formed outwards from the surface of the vacuum cleaner suction tube - from the original surface.
  • “Starting from the central axis” means that the locking projection is formed outwards from a viewing direction starting from the central axis from the material of the vacuum cleaner suction tube.
  • the latching projection is shaped outwards in an end region of the vacuum cleaner suction pipe
  • the power transmission between the add-on element made of plastic and the vacuum cleaner suction pipe is improved, so that an increased sealing effect is achieved.
  • the improved power transmission enables the use of polypropylene (PP) as plastic for the add-on elements, so that expensive plastics such as polyoxymethylene (POM) can be dispensed with.
  • PP polypropylene
  • POM polyoxymethylene
  • connection between an add-on element and the vacuum cleaner suction pipe is made, for example, in that the latching projection on the vacuum cleaner suction pipe engages in a form-fitting manner in a correspondingly formed snap-in recess on the add-on element, thereby producing a reliable snap-in connection between the vacuum cleaner suction pipe and the add-on element.
  • the latching projection has a latching edge and that the latching edge is formed orthogonal to the surface of the vacuum cleaner suction pipe, in particular that the latching edge is arranged on the side of the latching projection facing away from the end region.
  • the latching edge is consequently arranged orthogonally on the surface of the vacuum cleaner suction pipe and thus lies in a plane whose plane normal is the central axis of the vacuum cleaner suction pipe.
  • the latching edge is formed on the side of the latching projection facing away from the end region, so that a mounting element can be clamped in the assembled state between the end face of the vacuum cleaner suction pipe and the latching projection or the latching projections.
  • the locking edge of the locking projection and the end face of the vacuum cleaner suction tube are preferably arranged in mutually parallel planes.
  • the angle between the locking edge and the top of the locking projection is advantageously about 90 °.
  • the locking projection is not designed to prevent rotation between the attachment element and the vacuum cleaner suction pipe.
  • a rotation of the attachment element relative to the vacuum cleaner suction pipe is preferably prevented in that the cross section of the vacuum cleaner suction pipe is not rotationally symmetrical, that is to say for example at least partially has different radii, in particular namely at least in sections is parabolic.
  • the locking projection is now made of the material of the vacuum cleaner suction pipe, so that it has increased stability, since it - for example - like the vacuum cleaner suction pipe - made of a stainless steel is.
  • the locking projection is for producing a positive connection with an attachment, z. B. a nozzle socket, provided, the attachment being pushed onto the vacuum cleaner suction pipe.
  • the positive connection is inseparable when the vacuum cleaner suction pipe is used as intended.
  • the add-on element is fixed in place by the locking with the locking projection.
  • the stability of the connection between the vacuum cleaner suction pipe and an attachment element is increased according to the invention in that at least one second locking projection is formed in the end region on the vacuum cleaner suction pipe.
  • the second latching projection is preferably identical to the first latching projection and also latches in a second latching recess formed on an attachment element for the second latching projection. It is advantageously provided that at most two locking projections are provided in the end region.
  • first latching projection and the second latching projection are arranged opposite one another on the circumference of the vacuum cleaner suction pipe.
  • Such an arrangement of the first locking projection and the second locking projection results in an advantageous, uniform distribution of the power transmission from the attachment element to the vacuum cleaner suction pipe.
  • the first latching projection and the second latching projection preferably lie on an imaginary connecting line which connects the first latching projection, the central axis of the vacuum cleaner suction pipe and the second latching projection.
  • the distance between the top of the first locking projection and the top of the second locking projection is between 38 mm and 45 mm.
  • the latching projection has a run-on slope that is oriented in the direction of the end area, so that the height of the run-up slope increases with increasing distance from the end area.
  • the locking projection has a saddle surface between the end of the run-on slope and the locking edge.
  • the saddle surface is in particular formed parallel to the surface of the vacuum cleaner suction pipe.
  • the saddle surface lies in a plane that is arranged orthogonally to the plane of the latching edge.
  • the angle between the saddle surface and the locking edge is preferably approximately 90 °.
  • the length of the saddle surface that is to say the distance between the end of the run-on slope and the latching edge, is preferably between 1 mm and 2 mm, particularly preferably about 1.4 mm.
  • the run-on slope has an inclination between 12 ° and 20 °, and an inclination of approximately 16 ° has proven to be particularly advantageous for simple installation.
  • the start of the run-on slope has a distance of approximately 4 mm from the end edge of the vacuum cleaner suction pipe.
  • An advantageous power transmission between the vacuum cleaner suction pipe and the attachment element can be achieved according to a further embodiment in that the height of the latching edge is between 0.6 mm and 1 mm. It has also been found that a reliable connection can be ensured if the distance between the end face of the vacuum cleaner suction pipe and the latching edge is between 7 mm and 9 mm, in particular 8 mm.
  • the latching projection has a width between 5 mm and 20 mm.
  • the width of the latching projection means in particular the extent of the latching projection on the circumference of the vacuum cleaner suction pipe. A width of 10 mm is particularly advantageous.
  • an attachment element is included, that the attachment element is pushed onto the end of the vacuum cleaner suction pipe, that the attachment element has at least one detent recess on its inner circumference, that the detent recess is positively locked with the detent projection , by the detent recess at least partially abuts the detent edge, and that Add-on element is designed in such a way that the positive locking cannot be released.
  • the positive locking is not releasable in that the add-on element has no means for releasing the positive connection.
  • the add-on element consequently has at least one locking recess on its inner circumference, which is locked with the locking projection. The latching is therefore unsolvable.
  • non-releasable means that the latching can be released using tools and / or by destroying the vacuum cleaner suction pipe or the attachment element, but cannot be released when used as intended. It is not intended to release the catch during use.
  • the attachment element preferably has two latching recesses, which are designed to correspond to two latching projections arranged opposite one another and are latched to them.
  • connection is established in that the attachment element is pushed onto the end of the vacuum cleaner suction pipe, the material of the attachment element being elastically deformed at least temporarily - in the area of the latching projection or the latching projections - until the latching projection positively latches with the latching recess. Afterwards, loosening is not provided and is not possible without tools. A release of the locking is prevented in particular by the locking edge.
  • the attachment element has on its inner circumference a counter edge for the end face of the vacuum cleaner suction pipe, and that the attachment element is clamped between the end face and the locking edge.
  • the attachment element rests with its opposite edge on the end face of the vacuum cleaner suction pipe.
  • the locking edge lies in the locking recess, so that the attachment element is reliably fixed in its position.
  • the opposite edge is preferably all-round, so that the front edge lies completely against the opposite edge.
  • the attachment element is a socket, in particular a nozzle connection socket, and that the socket has at least one latching recess for latching with a suction tool.
  • the nozzle which is locked with the vacuum cleaner suction pipe is consequently designed to to be locked with a suction tool, for example a floor nozzle.
  • the socket has at least one locking recess in its outer circumference, into which a locking projection of a suction tool can engage for positive locking.
  • the nozzle is also designed to be inserted into a suction tool.
  • the cross section of the vacuum cleaner suction pipe has at least two areas, namely an arc-shaped first area and a parabolic second area.
  • This cross section is particularly provided where the locking projection is arranged. These areas result in the vacuum cleaner suction tube having a cross section that is not rotationally symmetrical, which improves the stability.
  • this shape of the cross section helps to prevent rotation of the attachment element relative to the vacuum cleaner suction pipe.
  • the parabolic region preferably forms a lower region of the cross section, the arcuate region forming an upper region of the cross section covering the parabolic region.
  • the arcuate area extends in particular over about 1/3 of the circumference, the parabolic area over 2/3 of the circumference.
  • the cross section of the vacuum cleaner suction tube is preferably mirror-symmetrical to a plane in which the central axis and the at least one latching projection, in particular both latching projections, lie.
  • the circular arc-shaped area preferably has a radius of approximately 30 mm, while the radii in the parabolic area vary between 30 mm and 60 mm.
  • a radius between 4 mm and 8 mm, in particular 5 mm, is preferably formed in the two transition regions between the first region and the second region.
  • a locking projection on a vacuum cleaner suction tube which bulges outwards from the central axis or the surface of a vacuum cleaner suction tube, is particularly preferred for the permanent attachment of add-on elements to the vacuum cleaner suction tube.
  • Advantageous add-on elements are, for example, connecting pieces which are pushed onto the vacuum cleaner suction pipe in the end region and are used to connect floor nozzles or the like.
  • Fig. 1 shows an embodiment of a vacuum cleaner suction pipe 1 in a perspective side view.
  • the vacuum cleaner suction pipe 1 has a locking projection 2 which is arranged in an end region 3 of the vacuum cleaner suction pipe 1.
  • the locking projection 2 is formed from the material of the vacuum cleaner suction pipe 1. In this embodiment, the material is stainless steel.
  • the latching projection 2 is consequently formed on the outside, starting from the surface 4 of the vacuum cleaner suction pipe 1, so that the latching projection 2 locally increases the circumference of the vacuum cleaner suction pipe 1 in the end region 3.
  • the locking projection 2 is completely closed, so that no leakage air can penetrate into the vacuum cleaner suction pipe 1 from the outside.
  • Fig. 2 shows the embodiment according to Fig. 1 in a side view.
  • a second locking projection 2 is provided on the vacuum cleaner suction pipe 1, which in this exemplary embodiment is arranged opposite one another on the circumference of the vacuum cleaner suction pipe 1.
  • the first locking projection 2 and the second locking projection 2 consequently lie on an imaginary connecting line, which also includes the central axis of the vacuum cleaner suction pipe 1.
  • Fig. 3 shows an enlargement of area A of Fig. 2 , which shows the opposite arrangement on the circumference of the vacuum cleaner suction tube 1 of the locking projections 2.
  • Fig. 3 shows the area A of the vacuum cleaner suction pipe 1 in a sectional view.
  • the latching projections 2 each have a latching edge 5, which is arranged on the side of the respective latching projection 2 facing away from the end region 3.
  • the locking edge 5 lies in a plane whose normal to the plane is the central axis of the vacuum cleaner suction pipe 1.
  • the central axis of the vacuum cleaner suction pipe 1 consequently passes through this plane orthogonally.
  • Fig. 4 shows an enlarged and cut section of area B of the Fig. 2.
  • Fig. 4 it can be seen that the latching projection 2 opposite the latching edge 5 has a run-on bevel 6, which in the assembly of a - in the 5 to 7 - Attachment element serves to perform this on the locking projection 2, so that a locking recess provided in the mounting element can lock with the locking projection 2.
  • the locking projection 2 is formed outwards, that is to say away from the central axis of the vacuum cleaner suction pipe 1.
  • a saddle surface 7 is formed between the end of the chamfer 6 and the locking edge 5. The angle between the saddle surface 7 and the locking edge 5 is 90 °.
  • Fig. 5 shows an embodiment of a vacuum cleaner suction pipe 1, which is locked with a mounting element 8.
  • the two locking projections 2 are positively locked with corresponding locking recesses on the inner circumference of the attachment element 8.
  • Fig. 6 shows an enlargement of a Range Fig. 5 .
  • the latching projection 2 is positively latched with the latching recess, the connection being undetachable since the attachment element has no means for releasing the latching.
  • the locking arrangement is additionally stabilized by the opposite arrangement of the locking projections 2.
  • the add-on element 8 also has a circumferential counter edge 9 on its inner circumference, which cooperates with the end face of the vacuum cleaner suction pipe 1, so that the add-on element is clamped between the end face and the latching edge 5.
  • Fig. 7 shows an embodiment of a vacuum cleaner suction pipe 1, which is locked with a mounting element 8.
  • the attachment element 8 is designed as a nozzle connecting piece and additionally has a latching recess 10 which is provided for latching with a suction tool (not shown).

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electric Suction Cleaners (AREA)
  • Electric Vacuum Cleaner (AREA)
  • Auxiliary Devices For Machine Tools (AREA)

Description

Die Erfindung betrifft ein Staubsauger-Saugrohr, mit mindestens einem Rastvorsprung, wobei der Rastvorsprung in einem Endbereich des Staubsauger-Saugrohrs ausgebildet ist, und wobei der Rastvorsprung aus dem Material des Staubsauger-Saugrohrs ausgeformt ist.The invention relates to a vacuum cleaner suction pipe, with at least one locking projection, the locking projection being formed in an end region of the vacuum cleaner suction tube, and wherein the locking projection is formed from the material of the vacuum cleaner suction tube.

Staubsauger-Saugrohre sind im Stand der Technik in einer Vielzahl von Ausgestaltungen bekannt. Staubsauger-Saugrohre sind häufig aus einem rostfreien Stahl hergestellt, wobei zumindest in den beiden Endbereichen eines Staubsauger-Saugrohrs Anbauelemente, beispielsweise aus Kunststoff, befestigt sind. Die Anbauelemente werden dabei vorteilhaft auf das Staubsauger-Saugrohr aufgeschoben oder in das Staubsauger-Saugrohr eingeschoben. Eine besondere Anforderung ist dabei die leckagefreie Abdichtung zwischen Staubsauger-Saugrohr und dem Anbauelement.Vacuum cleaner suction pipes are known in the prior art in a variety of configurations. Vacuum cleaner suction pipes are often made of a stainless steel, with attachment elements, for example made of plastic, being attached at least in the two end regions of a vacuum cleaner suction pipe. The add-on elements are advantageously pushed onto the vacuum cleaner suction pipe or pushed into the vacuum cleaner suction pipe. A particular requirement is the leak-free seal between the vacuum cleaner suction pipe and the add-on element.

Die WO 02/00087 A1 zeigt eine steckverbindbare Staubsaugerrohr-Anordnung mit einem rohrartigen Düsenstutzen, einem Muffenteil sowie einem Rohreinsteckende eines Saugrohres. Ein zungenartiges Bauteil dient der Verrastung der Teile miteinander. Dazu ist ein federnder Rastkörper mit einem kegelförmigen Querschnitt vorgesehen, der in Ausnehmungen des Düsenstutzens und des Rohreinsteckendes eingreifen kann, um diese sicher miteinander zu verbinden. Um ein passgenaues Verbinden der Bauteile zu realisieren ist ein Anschlag an dem Düsenstutzen vorgesehen, der mit einer Längssicke am Rohreinsteckende korrespondiert, die durch eine Nut im Muffenteil geführt wird.The WO 02/00087 A1 shows a plug-in vacuum cleaner pipe arrangement with a tubular nozzle socket, a sleeve part and a pipe insertion end of a suction pipe. A tongue-like component is used to lock the parts together. For this purpose, a resilient locking body with a conical cross section is provided, which can engage in recesses in the nozzle socket and the pipe insertion end in order to securely connect them to one another. In order to achieve a precisely fitting connection of the components, a stop is provided on the nozzle socket, which corresponds to a longitudinal bead at the pipe insertion end, which is guided through a groove in the socket part.

Die aus dem Stand der Technik bekannten Staubsauger-Saugrohre weisen häufig den Nachteil auf, dass eine zuverlässige Abdichtung, insbesondere bei der Verwendung von bestimmten Kunststoffen für die Anbauelemente, zwischen Staubsauger-Saugrohr und dem Anbauelement nicht ausreichend sichergestellt werden kann.The vacuum cleaner suction pipes known from the prior art often have the disadvantage that a reliable seal, in particular when certain plastics are used for the attachment elements, cannot be adequately ensured between the vacuum cleaner suction pipe and the attachment element.

Ausgehend von dem vorgenannten Stand der Technik liegt der Erfindung daher die Aufgabe zugrunde, ein Staubsauger-Saugrohr anzugeben, das eine zuverlässige und leckagefreie Verbindung mit einem Anbauelement bei Verwendung jeglicher Kunststoffarten für das Anbauelement ermöglicht.Starting from the aforementioned prior art, the invention is therefore based on the object of specifying a vacuum cleaner suction tube which is reliable and allows a leak-free connection to an add-on element when using any type of plastic for the add-on element.

Die vorgenannte Aufgabe ist zunächst und im Wesentlichen bei einem erfindungsgemäßen Staubsauger-Saugrohr dadurch gelöst, dass der Rastvorsprung ausgehend von der Mittelachse des Staubsauger-Saugrohrs nach außen ausgebildet ist, dass der Rastvorsprung eine Rastkante aufweist, dass die Rastkante in einer Ebene liegt, deren Ebenennormale die Mittelachse des Staubsauger-Saugrohrs ist, und dass die Rastkante auf der von der Endbereich weggewandten Seite des Rastvorsprungs angeordnet ist.The aforementioned task is first and essentially achieved in a vacuum cleaner suction pipe according to the invention in that the latching projection is formed on the outside, starting from the central axis of the vacuum cleaner suction pipe, in that the latching projection has a latching edge, that the latching edge lies in a plane whose plane normal is the central axis of the vacuum cleaner suction pipe, and that the latching edge is arranged on the side of the latching projection facing away from the end region.

Das Staubsauger-Saugrohr weist folglich in einem Endbereich, vorzugsweise in dem im Benutzungszustand bodenseitig orientierten Endbereich, zur Befestigung beispielsweise eines Anbauelements, z. B. eines Stutzens oder einer Düse, mindestens einen Rastvorsprung auf, der aus dem Material des Staubsauger-Saugrohrs ausgebildet ist. Vorzugsweise wird das Material des Staubsauger-Saugrohrs durch lokales plastisches Verformen in die Form des Rastvorsprungs gebracht. Der Rastvorsprung ist folglich in Richtung von der Mittelachse des Staubsauger-Saugrohrs weg, nach außen ausgebildet. Durch den Rastvorsprung, der nach außen ausgebildet ist, wird folglich der äußere Umfang des Staubsauger-Saugrohrs im Bereich des Rastvorsprungs vergrößert. Anders gesagt, ist der Rastvorsprung ausgehend von der Oberfläche des Staubsauger-Saugrohrs - aus ursprünglichen Oberfläche - nach außen ausgebildet. "Ausgehend von der Mittelachse" bedeutet, dass der Rastvorsprung von einer Betrachtungsrichtung ausgehend von der Mittelachse aus dem Material des Staubsauger-Saugrohrs nach außen ausgebildet ist.The vacuum cleaner suction pipe consequently has in an end region, preferably in the end region oriented on the bottom in the state of use, for fastening, for example, an add-on element, for. B. a nozzle or a nozzle, at least one locking projection which is formed from the material of the vacuum cleaner suction pipe. The material of the vacuum cleaner suction pipe is preferably brought into the shape of the locking projection by local plastic deformation. The locking projection is consequently formed in the direction away from the central axis of the vacuum cleaner suction tube. The latching projection, which is formed on the outside, consequently increases the outer circumference of the vacuum cleaner suction pipe in the region of the latching projection. In other words, the latching projection is formed outwards from the surface of the vacuum cleaner suction tube - from the original surface. "Starting from the central axis" means that the locking projection is formed outwards from a viewing direction starting from the central axis from the material of the vacuum cleaner suction tube.

Dadurch, dass der Rastvorsprung in einem Endbereich des Staubsauger-Saugrohrs nach außen geformt ist, wird die Kraftübertragung zwischen dem Anbauelement aus Kunststoff und dem Staubsauger-Saugrohr verbessert, so dass eine gesteigerte Dichtwirkung erzielt wird. Des Weiteren ist aufgrund der verbesserten Kraftübertragung die Verwendung von Polypropylen (PP) als Kunststoff für die Anbauelemente ermöglicht, so dass auf teure Kunststoffe, wie beispielsweise Polyoxymethylen (POM) verzichtet werden kann. Insgesamt lässt sich durch Verwendung eines nach außen gewölbten Rastvorsprungs eine größere Robustheit der Verbindung zwischen Staubsauger-Saugrohr und einem Anbauelement aus Kunststoff, beispielsweise eines Stutzens für eine Bodendüse, erzielen.Characterized in that the latching projection is shaped outwards in an end region of the vacuum cleaner suction pipe, the power transmission between the add-on element made of plastic and the vacuum cleaner suction pipe is improved, so that an increased sealing effect is achieved. Furthermore, the improved power transmission enables the use of polypropylene (PP) as plastic for the add-on elements, so that expensive plastics such as polyoxymethylene (POM) can be dispensed with. Overall, the use of an outwardly curved locking projection makes the connection between the vacuum cleaner suction pipe and one more robust Attachment made of plastic, such as a nozzle for a floor nozzle.

Die Verbindung zwischen einem Anbauelement und dem Staubsauger-Saugrohr wird beispielsweise dadurch hergestellt, dass der Rastvorsprung am Staubsauger-Saugrohr in eine entsprechend am Anbauelement ausgeformten Rastrücksprung - Tasche - formschlüssig eingreift, wodurch eine zuverlässige Rastverbindung zwischen Staubsauger-Saugrohr und Anbauelement hergestellt wird.The connection between an add-on element and the vacuum cleaner suction pipe is made, for example, in that the latching projection on the vacuum cleaner suction pipe engages in a form-fitting manner in a correspondingly formed snap-in recess on the add-on element, thereby producing a reliable snap-in connection between the vacuum cleaner suction pipe and the add-on element.

Es ist vorgesehen, dass der Rastvorsprung eine Rastkante aufweist, und dass die Rastkante orthogonal zur Oberfläche des Staubsauger-Saugrohrs ausgebildet ist, insbesondere dass die Rastkante auf der von dem Endbereich weggewandten Seite des Rastvorsprungs angeordnet ist. Die Rastkante ist folglich orthogonal an der Oberfläche des Staubsauger-Saugrohrs angeordnet und liegt damit in einer Ebene, deren Ebenennormale die Mittelachse des Staubsauger-Saugrohrs ist. Die Rastkante ist auf der von dem Endbereich weggewandten Seite des Rastvorsprungs ausgebildet, so dass ein Anbauelement im Montagezustand zwischen der endseitigen Stirnseite des Staubsauger-Saugrohrs und dem Rastvorsprung bzw. den Rastvorsprüngen verspannt werden kann. Die Rastkante des Rastvorsprungs und die endseitige Stirnkante des Staubsauger-Saugrohrs sind vorzugsweise in zueinander parallel verlaufenden Ebenen angeordnet.It is provided that the latching projection has a latching edge and that the latching edge is formed orthogonal to the surface of the vacuum cleaner suction pipe, in particular that the latching edge is arranged on the side of the latching projection facing away from the end region. The latching edge is consequently arranged orthogonally on the surface of the vacuum cleaner suction pipe and thus lies in a plane whose plane normal is the central axis of the vacuum cleaner suction pipe. The latching edge is formed on the side of the latching projection facing away from the end region, so that a mounting element can be clamped in the assembled state between the end face of the vacuum cleaner suction pipe and the latching projection or the latching projections. The locking edge of the locking projection and the end face of the vacuum cleaner suction tube are preferably arranged in mutually parallel planes.

Der Winkel zwischen Rastkante und der Oberseite des Rastvorsprungs beträgt vorteilhaft etwa 90°. Der Rastvorsprung ist nicht dazu ausgebildet, eine Rotation zwischen Anbauelement und Staubsauger-Saugrohr zu verhindern. Eine Rotation des Anbauelements relativ zum Staubsauger-Saugrohr wird vorzugsweise dadurch verhindert, dass der Querschnitt des Staubsauger-Saugrohrs nicht rotationssymmetrisch ist, also beispielsweise zumindest teilweise unterschiedliche Radien aufweist, insbesondere nämlich zumindest abschnittweise parabelförmig ist.The angle between the locking edge and the top of the locking projection is advantageously about 90 °. The locking projection is not designed to prevent rotation between the attachment element and the vacuum cleaner suction pipe. A rotation of the attachment element relative to the vacuum cleaner suction pipe is preferably prevented in that the cross section of the vacuum cleaner suction pipe is not rotationally symmetrical, that is to say for example at least partially has different radii, in particular namely at least in sections is parabolic.

Der Rastvorsprung ist nunmehr aus dem Material des Staubsauger-Saugrohrs hergestellt, so dass dieser eine gesteigerte Stabilität aufweist, da er beispielsweise - wie das Staubsauger-Saugrohr - aus einem rostfreien Stahl gefertigt ist. Der Rastvorsprung ist zur Herstellung einer formschlüssigen Verbindung mit einem Anbauelement, z. B. einem Düsenstutzen, vorgesehen, wobei das Anbauelement auf das Staubsauger-Saugrohr aufgeschoben wird. Die formschlüssige Verbindung ist bei einer bestimmungsgemäßen Benutzung des Staubsauger-Saugrohrs unlösbar. Das Anbauelement wird durch die Verrastung mit dem Rastvorsprung ortsfest fixiert.The locking projection is now made of the material of the vacuum cleaner suction pipe, so that it has increased stability, since it - for example - like the vacuum cleaner suction pipe - made of a stainless steel is. The locking projection is for producing a positive connection with an attachment, z. B. a nozzle socket, provided, the attachment being pushed onto the vacuum cleaner suction pipe. The positive connection is inseparable when the vacuum cleaner suction pipe is used as intended. The add-on element is fixed in place by the locking with the locking projection.

Die Stabilität der Verbindung zwischen Staubsauger-Saugrohr und einem Anbauelement wird erfindungsgemäß dadurch gesteigert, dass mindestens ein zweiter Rastvorsprung in dem Endbereich am Staubsauger-Saugrohr ausgebildet ist. Der zweite Rastvorsprung ist vorzugsweise identisch zum ersten Rastvorsprung ausgebildet und verrastet ebenfalls in einem an einem Anbauelement für den zweiten Rastvorsprung ausgebildeten zweiten Rastrücksprung. Vorteilhaft ist vorgesehen, dass in dem Endbereich höchstens zwei Rastvorsprünge vorgesehen sind.The stability of the connection between the vacuum cleaner suction pipe and an attachment element is increased according to the invention in that at least one second locking projection is formed in the end region on the vacuum cleaner suction pipe. The second latching projection is preferably identical to the first latching projection and also latches in a second latching recess formed on an attachment element for the second latching projection. It is advantageously provided that at most two locking projections are provided in the end region.

Als besonders vorteilhaft hat sich gemäß einer weiteren Ausgestaltung herausgestellt, wenn der erste Rastvorsprung und der zweite Rastvorsprung auf dem Umfang des Staubsauger-Saugrohrs gegenüberliegend angeordnet sind. Durch eine derartige Anordnung des ersten Rastvorsprungs und des zweiten Rastvorsprungs ergibt sich eine vorteilhafte gleichmäßige Verteilung der Kraftübertragung vom Anbauelement auf das Staubsauger-Saugrohr. Der erste Rastvorsprung und der zweite Rastvorsprung liegen vorzugsweise auf einer gedachten Verbindungslinie, die den ersten Rastvorsprung, die Mittelachse des Staubsauger-Saugrohrs und den zweiten Rastvorsprung miteinander verbindet. Insbesondere beträgt der Abstand zwischen der Oberseite des ersten Rastvorsprungs und der Oberseite des zweiten Rastvorsprungs zwischen 38 mm und 45 mm.It has been found to be particularly advantageous according to a further embodiment if the first latching projection and the second latching projection are arranged opposite one another on the circumference of the vacuum cleaner suction pipe. Such an arrangement of the first locking projection and the second locking projection results in an advantageous, uniform distribution of the power transmission from the attachment element to the vacuum cleaner suction pipe. The first latching projection and the second latching projection preferably lie on an imaginary connecting line which connects the first latching projection, the central axis of the vacuum cleaner suction pipe and the second latching projection. In particular, the distance between the top of the first locking projection and the top of the second locking projection is between 38 mm and 45 mm.

Um die Montage eines Anbauelements am Staubsauger-Saugrohr zu vereinfachen, ist gemäß einer weiteren Ausgestaltung vorgesehen, dass der Rastvorsprung eine in Richtung des Endbereichs orientierte Anlaufschräge aufweist, so dass die Höhe der Anlaufschräge mit zunehmendem Abstand zum Endbereich ansteigt. Ein Anbauelement, das zur Montage an dem Staubsauger-Saugrohr vorgesehen ist, kann folglich aus der endseitigen Richtung auf das Staubsauger-Saugrohr aufgeschoben werden, so dass das Anbauelement über die Anlaufschräge auf die maximale Höhe des Rastvorsprungs geführt wird, so dass anschließend ein Einrasten des Rastrücksprungs am Anbauelement auf den Rastvorsprung erfolgen kann.In order to simplify the assembly of an add-on element on the vacuum cleaner suction pipe, it is provided according to a further embodiment that the latching projection has a run-on slope that is oriented in the direction of the end area, so that the height of the run-up slope increases with increasing distance from the end area. An attachment element, which is provided for mounting on the vacuum cleaner suction pipe, can consequently be pushed onto the vacuum cleaner suction pipe from the end direction, so that the attachment element is guided to the maximum height of the locking projection via the run-on slope that the latching recess on the attachment element can then be snapped onto the latching projection.

Ferner ist vorgesehen, dass der Rastvorsprung zwischen dem Ende der Anlaufschräge und der Rastkante eine Sattelfläche aufweist. Die Sattelfläche ist insbesondere parallel zur Oberfläche des Staubsauger-Saugrohrs ausgebildet. Es ist aber auch vorgesehen, dass die Sattelfläche in einer Ebene liegt, die orthogonal zur Ebene der Rastkante angeordnet ist. Vorzugsweise beträgt der Winkel zwischen Sattelfläche und Rastkante etwa 90°. Die Länge der Sattelfläche, also der Abstand zwischen dem Ende der Anlaufschräge und der Rastkante beträgt vorzugsweise zwischen 1 mm und 2 mm, besonders bevorzugt etwa 1,4 mm. Die Anlaufschräge hat eine Neigung zwischen 12° und 20°, als besonders vorteilhaft für eine einfache Montage hat sich eine Neigung von etwa 16° herausgestellt. Der Beginn der Anlaufschräge weist einen Abstand von etwa 4 mm zur endseitigen Stirnkante des Staubsauger-Saugrohrs auf.It is also provided that the locking projection has a saddle surface between the end of the run-on slope and the locking edge. The saddle surface is in particular formed parallel to the surface of the vacuum cleaner suction pipe. However, it is also provided that the saddle surface lies in a plane that is arranged orthogonally to the plane of the latching edge. The angle between the saddle surface and the locking edge is preferably approximately 90 °. The length of the saddle surface, that is to say the distance between the end of the run-on slope and the latching edge, is preferably between 1 mm and 2 mm, particularly preferably about 1.4 mm. The run-on slope has an inclination between 12 ° and 20 °, and an inclination of approximately 16 ° has proven to be particularly advantageous for simple installation. The start of the run-on slope has a distance of approximately 4 mm from the end edge of the vacuum cleaner suction pipe.

Eine vorteilhafte Kraftübertragung zwischen Staubsauger-Saugrohr und Anbauelement kann gemäß einer weiteren Ausgestaltung dadurch erzielt werden, dass die Höhe der Rastkante zwischen 0,6 mm und 1 mm beträgt. Zudem hat sich herausgestellt, dass eine zuverlässige Verbindung dadurch gewährleistet werden kann, wenn der Abstand zwischen der endseitigen Stirnseite des Staubsauger-Saugrohrs und der Rastkante zwischen 7 mm und 9 mm beträgt, insbesondere 8 mm beträgt.An advantageous power transmission between the vacuum cleaner suction pipe and the attachment element can be achieved according to a further embodiment in that the height of the latching edge is between 0.6 mm and 1 mm. It has also been found that a reliable connection can be ensured if the distance between the end face of the vacuum cleaner suction pipe and the latching edge is between 7 mm and 9 mm, in particular 8 mm.

Vorteilhaft für die Kraftübertragung ist es ferner, wenn vorgesehen ist, dass der Rastvorsprung eine Breite zwischen 5 mm und 20 mm aufweist. Mit der Breite des Rastvorsprungs ist insbesondere die Erstreckung des Rastvorsprungs auf dem Umfang des Staubsauger-Saugrohrs gemeint. Besonders vorteilhaft ist eine Breite von 10 mm.It is also advantageous for the power transmission if it is provided that the latching projection has a width between 5 mm and 20 mm. The width of the latching projection means in particular the extent of the latching projection on the circumference of the vacuum cleaner suction pipe. A width of 10 mm is particularly advantageous.

Besonders bevorzugt ist gemäß einer weiteren Ausgestaltung, wenn vorgesehen ist, dass ein Anbauelement umfasst ist, dass das Anbauelement endseitig auf das Staubsauger-Saugrohr aufgeschoben ist, dass das Anbauelement auf seinem Innenumfang mindestens einen Rastrücksprung aufweist, dass der Rastrücksprung mit dem Rastvorsprung formschlüssig verrastet ist, indem der Rastrücksprung zumindest teilweise an der Rastkante anliegt, und dass das Anbauelement derart ausgestaltet ist, dass die formschlüssige Verrastung unlösbar ist. Die formschlüssige Verrastung ist dadurch unlösbar, dass das Anbauelement keine Mittel zum Lösen der formschlüssigen Verbindung aufweist. Das Anbauelement weist folglich mindestens einen Rastrücksprung auf seinem Innenumfang auf, der mit dem Rastvorsprung verrastet ist. Die Verrastung ist somit unlösbar. "Unlösbar" bedeutet in diesem Zusammenhang, dass die Verrastung zwar unter Einsatz von Werkzeug und/oder durch Zerstörung des Staubsauger-Saugrohres oder des Anbauelements lösbar ist, bei einem bestimmungsgemäßen Gebrauch jedoch nicht lösbar ist. Ein Lösen der Verrastung während der Benutzung ist nicht vorgesehen. Vorzugsweise weist das Anbauelement zwei Rastrücksprünge auf, die korrespondierend zu zwei gegenüberliegend angeordneten Rastvorsprüngen ausgebildet und mit diesen verrastet sind.It is particularly preferred according to a further embodiment, if it is provided that an attachment element is included, that the attachment element is pushed onto the end of the vacuum cleaner suction pipe, that the attachment element has at least one detent recess on its inner circumference, that the detent recess is positively locked with the detent projection , by the detent recess at least partially abuts the detent edge, and that Add-on element is designed in such a way that the positive locking cannot be released. The positive locking is not releasable in that the add-on element has no means for releasing the positive connection. The add-on element consequently has at least one locking recess on its inner circumference, which is locked with the locking projection. The latching is therefore unsolvable. In this context, “non-releasable” means that the latching can be released using tools and / or by destroying the vacuum cleaner suction pipe or the attachment element, but cannot be released when used as intended. It is not intended to release the catch during use. The attachment element preferably has two latching recesses, which are designed to correspond to two latching projections arranged opposite one another and are latched to them.

Die Verbindung wird dadurch hergestellt, dass das Anbauelement endseitig auf das Staubsauger-Saugrohr aufgeschoben wird, wobei das Material des Anbauelement zumindest temporär - im Bereich des Rastvorsprungs oder der Rastvorsprünge - elastisch verformt wird, bis der Rastvorsprung formschlüssig mit dem Rastrücksprung verrastet. Anschließend ist ein Lösen nicht vorgesehen und ohne Werkzeug nicht möglich. Ein Lösen der Verrastung wird insbesondere durch die Rastkante verhindert.The connection is established in that the attachment element is pushed onto the end of the vacuum cleaner suction pipe, the material of the attachment element being elastically deformed at least temporarily - in the area of the latching projection or the latching projections - until the latching projection positively latches with the latching recess. Afterwards, loosening is not provided and is not possible without tools. A release of the locking is prevented in particular by the locking edge.

Gemäß einer weiteren Ausgestaltung ist ferner vorgesehen, dass das Anbauelement an seinem Innenumfang eine Gegenkante für die Stirnseite des Staubsauger-Saugrohrs aufweist, und dass das Anbauelement zwischen Stirnseite und Rastkante eingespannt ist. Im Montagezustand liegt das Anbauelement mit seiner Gegenkante an der endseitigen Stirnseite des Staubsauger-Saugrohrs an. Gleichzeitig liegt die Rastkante in dem Rastrücksprung an, so dass das Anbauelement in seiner Position zuverlässig fixiert ist. Die Gegenkante ist vorzugsweise umlaufend, so dass die Stirnkante vollständig an der Gegenkante anliegt.According to a further embodiment, it is further provided that the attachment element has on its inner circumference a counter edge for the end face of the vacuum cleaner suction pipe, and that the attachment element is clamped between the end face and the locking edge. In the assembled state, the attachment element rests with its opposite edge on the end face of the vacuum cleaner suction pipe. At the same time, the locking edge lies in the locking recess, so that the attachment element is reliably fixed in its position. The opposite edge is preferably all-round, so that the front edge lies completely against the opposite edge.

Eine weitere Ausgestaltung sieht vor, dass das Anbauelement ein Stutzen ist, insbesondere ein Düsenanschlussstutzen, und dass der Stutzen mindestens eine Rastausnehmung zur Verrastung mit einem Saugwerkzeug aufweist. Der mit dem Staubsauger-Saugrohr verrastete Stutzen ist folglich dazu ausgebildet, mit einem Saugwerkzeug, beispielsweise einer Bodendüse, verrastet zu werden. Dazu weist der Stutzen mindestens eine Rastausnehmung in seinem Außenumfang auf, in die ein Rastvorsprung eines Saugwerkzeuges zur formschlüssigen Verrastung eingreifen kann. Der Stutzen ist ferner dazu ausgebildet, in ein Saugwerkzeug eingesteckt zu werden.A further embodiment provides that the attachment element is a socket, in particular a nozzle connection socket, and that the socket has at least one latching recess for latching with a suction tool. The nozzle which is locked with the vacuum cleaner suction pipe is consequently designed to to be locked with a suction tool, for example a floor nozzle. For this purpose, the socket has at least one locking recess in its outer circumference, into which a locking projection of a suction tool can engage for positive locking. The nozzle is also designed to be inserted into a suction tool.

Gemäß einer letzten Ausgestaltung ist vorgesehen, dass der Querschnitt des Staubsauger-Saugrohrs mindestens zwei Bereiche aufweist, nämlich einen kreisbogenförmigen ersten Bereich und einen parabelförmigen zweiten Bereich. Dieser Querschnitt ist insbesondere dort vorgesehen, wo der Rastvorsprung angeordnet ist. Diese Bereiche führen dazu, dass das Staubsauger-Saugrohr einen Querschnitt aufweist, der nicht rotationssymmetrisch ist, wodurch die Stabilität verbessert wird. Zudem trägt diese Form des Querschnitts dazu bei, dass eine Rotation des Anbauelements relativ zum Staubsauger-Saugrohr zuverlässig verhindert wird. Vorzugsweise bildet der parabelförmige Bereich einen unteren Bereich des Querschnitts, wobei der kreisbogenförmige Bereich einen den parabelförmigen Bereich abdeckenden oberen Bereich des Querschnitts bildet. Der kreisbogenförmige Bereich erstreckt sich insbesondere über etwa 1/3 des Umfangs, der parabelförmige Bereich über 2/3 des Umfangs. Bevorzugt ist der Querschnitt des Staubsauger-Saugrohrs spiegelsymmetrisch zu einer Ebene, in der die Mittelachse und der mindestens eine Rastvorsprung, insbesondere beide Rastvorsprünge, liegen.According to a last embodiment, it is provided that the cross section of the vacuum cleaner suction pipe has at least two areas, namely an arc-shaped first area and a parabolic second area. This cross section is particularly provided where the locking projection is arranged. These areas result in the vacuum cleaner suction tube having a cross section that is not rotationally symmetrical, which improves the stability. In addition, this shape of the cross section helps to prevent rotation of the attachment element relative to the vacuum cleaner suction pipe. The parabolic region preferably forms a lower region of the cross section, the arcuate region forming an upper region of the cross section covering the parabolic region. The arcuate area extends in particular over about 1/3 of the circumference, the parabolic area over 2/3 of the circumference. The cross section of the vacuum cleaner suction tube is preferably mirror-symmetrical to a plane in which the central axis and the at least one latching projection, in particular both latching projections, lie.

Der kreisbogenförmige Bereich weist vorzugsweise einen Radius von etwa 30 mm auf, während die Radien im parabelförmigen Bereich zwischen 30 mm und 60 mm variieren. Bevorzugt ist in den beiden Übergangsbereichen zwischen dem ersten Bereich und dem zweiten Bereich ein Radius zwischen 4 mm und 8 mm ausgebildet, insbesondere 5 mm.The circular arc-shaped area preferably has a radius of approximately 30 mm, while the radii in the parabolic area vary between 30 mm and 60 mm. A radius between 4 mm and 8 mm, in particular 5 mm, is preferably formed in the two transition regions between the first region and the second region.

Wie bereits beschrieben, ist die Verwendung eines ausgehend der Mittelachse bzw. der Oberfläche eines Staubsauger-Saugrohres nach außen gewölbten Rastvorsprungs an einem Staubsauger-Saugrohr zur unlösbaren Befestigung von Anbauelementen an dem Staubsauger-Saugrohr besonders bevorzugt. Vorteilhafte Anbauelemente sind dabei beispielsweise Verbindungsstutzen, die auf das Staubsauger-Saugrohr in dem Endbereich aufgeschoben werden und zum Anschluss von Bodendüsen o. ä. dienen.As already described, the use of a locking projection on a vacuum cleaner suction tube, which bulges outwards from the central axis or the surface of a vacuum cleaner suction tube, is particularly preferred for the permanent attachment of add-on elements to the vacuum cleaner suction tube. Advantageous add-on elements are, for example, connecting pieces which are pushed onto the vacuum cleaner suction pipe in the end region and are used to connect floor nozzles or the like.

Im Einzelnen gibt es nun eine Vielzahl von Möglichkeiten, das Staubsauger-Saugrohr auszugestalten und weiterzubilden. Dazu wird verwiesen auf die dem Patentanspruch 1 nachgeordneten Patentansprüche sowie auf die nachfolgenden Beschreibung von bevorzugten Ausführungsbeispielen in Verbindung mit der Zeichnung. In der Zeichnung zeigen:

Fig. 1
ein Ausführungsbeispiel eines Staubsauger-Saugrohrs in perspektivischer Ansicht,
Fig. 2
das Ausführungsbeispiel eines Staubsauger-Saugrohrs gemäß Fig. 1 in Seitenansicht,
Fig. 3
den Ausschnitt im Bereich A der Fig. 2,
Fig. 4
einen Ausschnitt im Bereich B der Fig. 2,
Fig. 5
ein Ausführungsbeispiel eines Staubsauger-Saugrohrs mit Anbauelement,
Fig. 6
einen Ausschnitt des Ausführungsbeispiels gemäß Fig. 5, und
Fig.7
ein Ausführungsbeispiel eines Staubsauger-Saugrohrs mit Anbauelement.
In detail, there are now a multitude of options for designing and developing the vacuum cleaner suction pipe. For this purpose, reference is made to the claims subordinate to claim 1 and to the following description of preferred exemplary embodiments in conjunction with the drawing. The drawing shows:
Fig. 1
an embodiment of a vacuum cleaner suction pipe in perspective view,
Fig. 2
the embodiment of a vacuum cleaner suction pipe according to Fig. 1 in side view,
Fig. 3
the section in area A of Fig. 2 ,
Fig. 4
a section in area B of Fig. 2 ,
Fig. 5
an embodiment of a vacuum cleaner suction pipe with attachment,
Fig. 6
a section of the embodiment according to Fig. 5 , and
Fig. 7
an embodiment of a vacuum cleaner suction pipe with attachment.

Fig. 1 zeigt ein Ausführungsbeispiel eines Staubsauger-Saugrohr 1 in perspektivischer Seitenansicht. Das Staubsauger-Saugrohr 1 weist einen Rastvorsprung 2 auf, der in einen Endbereich 3 des Staubsauger-Saugrohrs 1 angeordnet ist. Der Rastvorsprung 2 ist aus dem Material des Staubsauger-Saugrohrs 1 ausgeformt. Bei diesem Ausführungsbeispiel ist das Material ein rostfreier Stahl. Der Rastvorsprung 2 ist folglich ausgehend von der Oberfläche 4 des Staubsauger-Saugrohrs 1 nach außen ausgebildet, so dass der Rastvorsprung 2 den Umfang des Staubsauger-Saugrohrs 1 im Endbereich 3 lokal vergrößert. Der Rastvorsprung 2 ist vollständig geschlossen, so dass keine Leckluft von außen in das Staubsauger-Saugrohr 1 eindringen kann. Fig. 1 shows an embodiment of a vacuum cleaner suction pipe 1 in a perspective side view. The vacuum cleaner suction pipe 1 has a locking projection 2 which is arranged in an end region 3 of the vacuum cleaner suction pipe 1. The locking projection 2 is formed from the material of the vacuum cleaner suction pipe 1. In this embodiment, the material is stainless steel. The latching projection 2 is consequently formed on the outside, starting from the surface 4 of the vacuum cleaner suction pipe 1, so that the latching projection 2 locally increases the circumference of the vacuum cleaner suction pipe 1 in the end region 3. The locking projection 2 is completely closed, so that no leakage air can penetrate into the vacuum cleaner suction pipe 1 from the outside.

Fig. 2 zeigt das Ausführungsbeispiel gemäß Fig. 1 in einer Seitenansicht. Im Endbereich 3 ist an dem Staubsauger-Saugrohr 1 ein zweiter Rastvorsprung 2 vorgesehen, der bei diesem Ausführungsbeispiel gegenüberliegend auf dem Umfang des Staubsauger-Saugrohrs 1 angeordnet ist. Der erste Rastvorsprung 2 und der zweite Rastvorsprung 2 liegen folglich gemeinsam auf einer gedachten Verbindungslinie, die auch die Mittelachse des Staubsauger-Saugrohrs 1 beinhaltet. Fig. 2 shows the embodiment according to Fig. 1 in a side view. In the end region 3, a second locking projection 2 is provided on the vacuum cleaner suction pipe 1, which in this exemplary embodiment is arranged opposite one another on the circumference of the vacuum cleaner suction pipe 1. The first locking projection 2 and the second locking projection 2 consequently lie on an imaginary connecting line, which also includes the central axis of the vacuum cleaner suction pipe 1.

Fig. 3 zeigt eine Vergrößerung des Bereichs A der Fig. 2, der die gegenüber liegende Anordnung auf dem Umfang des Staubsauger-Saugrohrs 1 der Rastvorsprünge 2 zu entnehmen ist. Fig. 3 zeigt den Bereich A des Staubsauger-Saugrohrs 1 in geschnittener Ansicht. Die Rastvorsprünge 2 weisen jeweils eine Rastkante 5 auf, die auf der von dem Endbereich 3 weggewandten Seite des jeweiligen Rastvorsprungs 2 angeordnet ist. Die Rastkante 5 liegt in einer Ebene, deren Ebenennormale die Mittelachse des Staubsauger-Saugrohrs 1 ist. Die Mittelachse des Staubsauger-Saugrohrs 1 durchtritt diese Ebene folglich orthogonal. Fig. 3 shows an enlargement of area A of Fig. 2 , which shows the opposite arrangement on the circumference of the vacuum cleaner suction tube 1 of the locking projections 2. Fig. 3 shows the area A of the vacuum cleaner suction pipe 1 in a sectional view. The latching projections 2 each have a latching edge 5, which is arranged on the side of the respective latching projection 2 facing away from the end region 3. The locking edge 5 lies in a plane whose normal to the plane is the central axis of the vacuum cleaner suction pipe 1. The central axis of the vacuum cleaner suction pipe 1 consequently passes through this plane orthogonally.

Fig. 4 zeigt einen vergrößerten und geschnittenen Ausschnitt des Bereichs B der Fig. 2. Fig. 4 ist zu entnehmen, dass der Rastvorsprung 2 gegenüberliegend der Rastkante 5 eine Anlaufschräge 6 aufweist, die bei der Montage eines - in den Fig. 5 bis 7 dargestellten - Anbauelements dazu dient, dieses auf den Rastvorsprung 2 aufzuführen, so dass ein in dem Anbauelement vorgesehener Rastrücksprung mit dem Rastvorsprung 2 verrasten kann. Ausgehend von der Mittelachse des Staubsauger-Saugrohrs 1 ist der Rastvorsprung 2 nach außen, also weg von der Mittelachse des Staubsauger-Saugrohrs 1 ausgebildet. Dies hat den Vorteil, dass der Rastvorsprung 2 zur Befestigung eines Anbauelements aus dem Material des Staubsauger-Saugrohrs 1 ausgebildet ist und deshalb eine vorteilhafte Stabilität aufweist. Zwischen dem Ende der Anlaufschräge 6 und der Rastkante 5 ist eine Sattelfläche 7 ausgebildet. Der Winkel zwischen Sattelfläche 7 und der Rastkante 5 beträgt 90°. Fig. 4 shows an enlarged and cut section of area B of the Fig. 2. Fig. 4 it can be seen that the latching projection 2 opposite the latching edge 5 has a run-on bevel 6, which in the assembly of a - in the 5 to 7 - Attachment element serves to perform this on the locking projection 2, so that a locking recess provided in the mounting element can lock with the locking projection 2. Starting from the central axis of the vacuum cleaner suction pipe 1, the locking projection 2 is formed outwards, that is to say away from the central axis of the vacuum cleaner suction pipe 1. This has the advantage that the latching projection 2 is designed to fasten an add-on element from the material of the vacuum cleaner suction pipe 1 and therefore has an advantageous stability. A saddle surface 7 is formed between the end of the chamfer 6 and the locking edge 5. The angle between the saddle surface 7 and the locking edge 5 is 90 °.

Fig. 5 zeigt ein Ausführungsbeispiel eines Staubsauger-Saugrohrs 1, das mit einem Anbauelement 8 verrastet ist. Insbesondere sind die beiden Rastvorsprünge 2 mit korrespondierenden Rastrücksprüngen an dem Innenumfang des Anbauelements 8 formschlüssig verrastet. Fig. 6 zeigt eine Vergrößerung eines Bereiches aus Fig. 5. Der Rastvorsprung 2 ist formschlüssig mit dem Rastrücksprung verrastet, wobei die Verbindung unlösbar ist, da das Anbauelement keine Mittel zum Lösen der Verrastung aufweist. Durch die gegenüberliegende Anordnung der Rastvorsprünge 2 wird die Verrastung zusätzlich stabilisiert. Das Anbauelement 8 weist an seinem Innenumfang zusätzlich eine umlaufende Gegenkante 9 auf, die mit der endseitigen Stirnseite des Staubsauger-Saugrohrs 1 zusammenwirkt, so dass das Anbauelement zwischen der Stirnseite und der Rastkante 5 verspannt ist. Fig. 5 shows an embodiment of a vacuum cleaner suction pipe 1, which is locked with a mounting element 8. In particular, the two locking projections 2 are positively locked with corresponding locking recesses on the inner circumference of the attachment element 8. Fig. 6 shows an enlargement of a Range Fig. 5 . The latching projection 2 is positively latched with the latching recess, the connection being undetachable since the attachment element has no means for releasing the latching. The locking arrangement is additionally stabilized by the opposite arrangement of the locking projections 2. The add-on element 8 also has a circumferential counter edge 9 on its inner circumference, which cooperates with the end face of the vacuum cleaner suction pipe 1, so that the add-on element is clamped between the end face and the latching edge 5.

Fig. 7 zeigt ein Ausführungsbeispiel eines Staubsauger-Saugrohrs 1, das mit einem Anbauelement 8 verrastet ist. Das Anbauelement 8 ist bei diesem Ausführungsbeispiel als Düsenanschlussstutzen ausgebildet und weist zusätzlich eine Rastausnehmung 10 aus, die zum Verrasten mit einem - nicht dargestellten - Saugwerkzeug vorgesehen ist. Fig. 7 shows an embodiment of a vacuum cleaner suction pipe 1, which is locked with a mounting element 8. In this exemplary embodiment, the attachment element 8 is designed as a nozzle connecting piece and additionally has a latching recess 10 which is provided for latching with a suction tool (not shown).

Claims (11)

  1. Vacuum cleaner suction tube (1), with at least one latching projection (2), wherein the latching projection (2) is formed in an end region (3) of the vacuum cleaner suction tube (1), and wherein the latching projection (2) is formed from the material of the vacuum cleaner suction tube (1),
    characterized in
    that the latching projection (2) is formed outwards starting from the central axis of the vacuum cleaner suction tube (1), that the latching projection (2) has a latching edge (5), that the latching edge (5) lies in a plane whose plane normal is the central axis of the vacuum cleaner suction tube (1), that the latching edge (5) is arranged on the side of the latching projection (2) facing away from the end region (3), and that at least one second latching projection (2) is formed in the end region (3) on the vacuum cleaner suction tube (1).
  2. Vacuum cleaner suction tube (1) according to claim 1, characterized in that the first latching projection (2) and the second latching projection (2) are arranged opposite each other on the periphery of the vacuum cleaner suction tube (1).
  3. Vacuum cleaner suction tube (1) according to claim 1 or 2, characterized in that the latching projection (2) has an approach slope (6) oriented in the direction of the end region (3), so that the height of the approach slope (6) increases with increasing distance from the end region (3).
  4. Vacuum cleaner suction tube (1) according to any one of claims 1 to 3, characterized in that the height of the latching edge (5) is between 0.6 mm and 1 mm.
  5. Vacuum cleaner suction tube (1) according to any one of claims 1 to 4, characterized in that the distance between the end face of the vacuum cleaner suction tube (1) and the latching edge (5) is between 7 mm and 9 mm, in particular 8 mm.
  6. Vacuum cleaner suction tube (1) according to any one of claims 1 to 5, characterized in that the latching projection (2) has a width of between 5 mm and 20 mm, in particular a width of 10 mm.
  7. Vacuum cleaner suction tube (1) according to any one of claims 1 to 6, characterized in that an attachment element (8) is included, that the attachment element (8) is pushed onto the vacuum cleaner suction tube (1) at the end, that the attachment element (8) has at least one latching recess on its inner circumference, in that the latching recess is positively locked to the latching projection (2) in that the latching recess rests at least partially against the latching edge (5), and that the attachment element (8) is designed in such a manner that positive locking is non-releasable.
  8. Vacuum cleaner suction tube (1) according to claim 7, characterized in that the attachment element (8) has a counter edge (9) on its inner circumference for the end face of the vacuum cleaner suction tube (1), and that the attachment element (8) is clamped between the end face and the latching edge (5).
  9. Vacuum cleaner suction tube (1) according to claim 7 or 8, characterized in that the attachment element (8) is a nozzle, and that the nozzle has at least one snap-in recess (10) for latching with a suction tool.
  10. Vacuum cleaner suction tube (1) according to any one of claims 1 to 9, characterized in that the cross-section of the vacuum cleaner suction tube (1) has at least two regions, namely a circular arc-shaped first region and a parabolic second region.
  11. Usage of two latching projections (2), which are outwardly curved starting from the center axis of a vacuum cleaner suction tube (1) and each have a latching edge (5), wherein the latching edge (5) extends in a plane, the plane normal of which is the center axis, for positive and non-detachable latching of the vacuum cleaner suction tube (1) with an attachment element (8).
EP14157105.9A 2013-03-01 2014-02-27 Vacuum cleaner suction tube Active EP2772174B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI201431643T SI2772174T1 (en) 2013-03-01 2014-02-27 Vacuum cleaner suction tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102013102045 2013-03-01

Publications (3)

Publication Number Publication Date
EP2772174A2 EP2772174A2 (en) 2014-09-03
EP2772174A3 EP2772174A3 (en) 2017-03-22
EP2772174B1 true EP2772174B1 (en) 2020-06-10

Family

ID=50193280

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14157105.9A Active EP2772174B1 (en) 2013-03-01 2014-02-27 Vacuum cleaner suction tube

Country Status (6)

Country Link
EP (1) EP2772174B1 (en)
CN (1) CN104013362B (en)
DE (1) DE102014102654A1 (en)
HK (1) HK1201428A1 (en)
HU (1) HUE050620T2 (en)
SI (1) SI2772174T1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019126020A1 (en) * 2019-09-26 2021-04-01 Vorwerk & Co. Interholding Gmbh End attachment for connection to a suction channel end area, system consisting of a suction channel of a suction cleaning device and an end attachment as well as a suction cleaning device

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2245151A (en) * 1939-06-08 1941-06-10 P A Geier Co Tubular coupling for suction cleaners and the like
DE19653073C1 (en) * 1996-12-19 1997-12-11 Froh Carl Gmbh Vacuum cleaner tube
DE19850355A1 (en) * 1998-11-02 2000-05-11 Froh Carl Gmbh Telescopic vacuum cleaner suction pipe
DE19851405C2 (en) * 1998-11-07 2003-04-03 Wessel Werk Gmbh Additional device for static vacuum cleaner nozzles
EP1099894B1 (en) * 1999-11-10 2003-08-20 Plastiflex Belgium Flexible hose
DE10030304A1 (en) * 2000-06-27 2002-02-14 Froh House Tech Gmbh & Co Kg Plug-in vacuum cleaner tube arrangement
JP4248459B2 (en) * 2004-08-05 2009-04-02 本田技研工業株式会社 Automatic engine stop device
FR2910263B1 (en) * 2006-12-22 2009-01-23 Seb Sa SUCTION DUCT FOR VACUUM.
DE102009021595B4 (en) * 2009-05-15 2011-04-28 Fischer Rohrtechnik Gmbh Plug-in pipe system for a vacuum cleaner
DE102009054162B4 (en) * 2009-11-23 2011-11-10 Fischer Rohrtechnik Gmbh Suction pipe for a vacuum cleaner

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
DE102014102654A1 (en) 2014-09-04
CN104013362B (en) 2018-10-26
SI2772174T1 (en) 2020-10-30
EP2772174A2 (en) 2014-09-03
CN104013362A (en) 2014-09-03
EP2772174A3 (en) 2017-03-22
HK1201428A1 (en) 2015-09-04
HUE050620T2 (en) 2020-12-28

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