EP0664988B1 - Telescopic suction tube with a helical electric conductor - Google Patents

Telescopic suction tube with a helical electric conductor Download PDF

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Publication number
EP0664988B1
EP0664988B1 EP94116619A EP94116619A EP0664988B1 EP 0664988 B1 EP0664988 B1 EP 0664988B1 EP 94116619 A EP94116619 A EP 94116619A EP 94116619 A EP94116619 A EP 94116619A EP 0664988 B1 EP0664988 B1 EP 0664988B1
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EP
European Patent Office
Prior art keywords
tube
conductor
outer tube
section
suction tube
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.)
Expired - Lifetime
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EP94116619A
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German (de)
French (fr)
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EP0664988A1 (en
Inventor
Gerhard Dipl.-Ing. Stettner
Achim Dipl.-Ing. Breiter
Dieter Wölfel
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AEG Hausgeraete GmbH
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AEG Hausgeraete GmbH
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Publication of EP0664988A1 publication Critical patent/EP0664988A1/en
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    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00Details 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
    • A47L9/24Hoses or pipes; Hose or pipe couplings
    • A47L9/242Hose or pipe couplings
    • A47L9/246Hose or pipe couplings with electrical connectors
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00Details 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
    • A47L9/24Hoses or pipes; Hose or pipe couplings
    • A47L9/242Hose or pipe couplings
    • A47L9/244Hose or pipe couplings for telescopic or extensible hoses or pipes

Definitions

  • the invention relates to an intake manifold according to the preamble of the first claim.
  • the invention is based, with one Intake pipe according to the preamble of the first claim To take measures by which a free mobility of the coiled section of the electrical line is achieved.
  • EP-A-0 395 908 shows a singing tube which consists of telescopic Share exists and includes an electrical line that a has expandable spiral cable in one of the tubes.
  • the spiral line mechanically so pretension that they are at rest in a stretched Starting position passes and so with pipes pulled out it is compressed that the individual turns close together come to rest.
  • a slide tab be in a radial direction corresponding to the cavity externally directed and running in the pipe longitudinal axis Shape of the outer tube engages tightly, like this one inner end portion of the inner tube at its remaining circumference sealing on the inner jacket of the outer tube is present.
  • the end section encompassing the inner tube of the outer tube lies sealingly on the outer circumference of the Raw inside, including the one designed as a groove Forming is closed on the end, so that also in this end section an all-round seal between the tubes.
  • the spiral line required groove can also be called radial internal molding in the jacket of the inner tube be relocated. Then one intervenes in an analogous manner Slide tab of the outer tube into this groove for sealing a, if not the seal in the area of immersed end portion of the inner tube is sufficient.
  • cavity can also be created by embossing on the inner tube be shown on the outer tube. Enough deformability the tube is not for the representation of each necessary groove, then the outer tube can also with be provided with a longitudinal slot, which by means of a arched channel profile piece is completed, which in Area of the breakthrough on the pipe in question, for example can be fixed by welding.
  • the channel profile by means of U-shaped side grooves to fix the relevant diaphragm walls.
  • the plastic profile piece it is advisable to make the plastic profile piece produce that as compared to the spiral line electrical insulator is used if the spiral cable in Operation should suffer insulation damage.
  • the spiral line can be connected to a preferably integrally connected additional electrical line section connected by the overlapped end section of the inner tube on the inner tube in the area of the free end of the inner tube to one there provided connection point leads.
  • From the second end of the Spiral line also preferably leads in one piece connected further electrical line section to the free end of the outer tube and to one there provided second junction.
  • the Pipe sections can be in the inner tube as in the Outer tube adapted beads are pressed in as provide mechanical protection for these line sections.
  • An inwardly embossed bead in the outer tube can record another line section and at the same time in one intervene adapted longitudinal bead of the inner tube and so as Serve against rotation between the two pipes.
  • the Spiral cable also made of flat and zigzag shaped contiguous spiral webs exist that are curved in particular in accordance with the pipe bend, so that the cavity is correspondingly low in the radial direction can be formed and the bead (s) correspondingly flat can be trained.
  • the representation of the cavity can then with less deformation work of the or of the pipes.
  • the groove of the outer tube can be structurally combined so that a closed structure is achieved, which may be necessary electrical connection connections between the Take up the spiral line and the further line section can.
  • the invention is based on the schematic diagram of an embodiment explained in more detail.
  • a telescopic suction pipe for vacuum cleaners to which electrically operated additional devices are to be connected, has an inner tube 1 and a larger in diameter Outer tube 2, the inner tube 1 in the axial direction longitudinally displaceable in the outer tube 2 via interposed Ring seals 3 is mounted. Between the inner tube 1 and the outer tube 2 is formed a cavity 4 in which a preferably two-core, in circular turns coiled electrical line is housed whose Spiral axis runs parallel to the pipe longitudinal axis.
  • the Cavity 4 can with an undeformed inner tube 1 by a radially outward, over the displacement of the Inner tube and the length of the compressed spiral line 5 reaching, radially outward and into the mantle of the outer tube 2 embossed groove 6 are formed, the Cross section sufficient to accommodate the helical cable is large, so that the spiral line 5 is free can be stretched and compressed.
  • the free interior of the outer tube is at the outer tube 2 overlapped end section 7 of the inner tube a radially in groove 6 engaging, possibly detachable, slide tab 8 scheduled that a tight conclusion on the free Travel within the groove 6 guaranteed.
  • a first end 11 of the helical line 5 is via clamping or Solder pieces, but preferably in one piece with one additional line section 12 connected by the Slide tab 8 or the adjacent end portion 7 of the Inner tube into the inner tube 1 and at the Inner jacket in the region of the free end 13 of the Inner tube and there to the outside to a first Junction 14 out with plug contacts 15.
  • This additional line section 12 can, however, also from the outside in a preferably inwardly directed longitudinal bead 16 of the inner tube, the open to the outside Longitudinal bead 16, for example with an insulating material is poured out and the round contour of the outer tube added.
  • This longitudinal bead can in an adapted longitudinal bead of the outer tube intervene and so as an anti-rotation between the two Pipes 1, 2 are used. That the free end 13 of the Inner tube facing second end 17 of the spiral line 5 is in the region of the end wall 10 of the groove 6 on the outer tube 2 set and preferably also goes in one piece a further line section 18 on the outer tube 2 to a the free end 19 of the outer tube 2 assigned second connection point 20 with Connection contacts 21 is guided.
  • the outer tube 2 a have corresponding longitudinal bead 22, which in addition to the Cavity 4 or runs along the groove 6.
  • she can either be shaped outwards, as is shown in FIG. 2 is shown to the right of the groove 6. However, it can also be directed radially inwards, as is shown in FIG. 2 is shown to the left of the groove 6. Then the further line section 18 inserted from the outside and can therein z. B. protected by a cover become.
  • One of the longitudinal beads embossed on the inside adapted, molded into the jacket of the inner tube 1 Guide bead 23 then serves as an anti-rotation between the pipes 1, 2.
  • the helical line 5 is in the Cavity 4 in its axially undrawn position. Will that Outer tube 2 pushed axially further onto inner tube 1, then the end wall 10 and thus the second migrates End 17 of the helical line 5 to the free end 13 of the Inner tube 1 down. Since the first end 11 of the helical line 5 is fixed to the inner tube 1, the helical line 4 axially stretched and thus serves as an elastic connecting link between the electrical line sections 12 and 18, which are fixed on the inner tube 1 or on the outer tube 2.
  • connection points 14 and 20 The Current-conducting connection between the connection points 14 and 20 remains thereby, the axial displacement of the Get pipes 1, 2 safely, with the spiral line 5 through their own insulation ensures that no electrical No more pipes, especially those made of metal 1, 2 can arise. Should such a hazard arise the bead 6 and that of it can be feared covered part of the inner tube with a additional electrical insulating coating be provided. When the pipes 1, 2 are pulled apart the spiral line 5 back into its position shown pushed. In this embodiment there are therefore none fault-prone sliding contacts required.
  • the helical line 5 can also be formed in that the cable is not wound spirally, but flat and is folded in a zigzag shape, this folding remains permanently and elastic after stretching contracts itself back to the starting position.
  • the spiral bar can be curved to match the pipe curvature be so that the cavity 4 with an enlarged extension in the circumferential direction essentially in its radial Dimension to the size of the diameter of each Spiral bars can restrict.
  • Such flat embossing can be carried out on pipes with simplified effort.
  • the groove 6 assigned to the outer tube 2 can be in one Actuating mechanism 24 for locking the pipes 1, 2 be integrated in different axial positions, so that overall a closed structure is achieved.

Description

Die Erfindung betrifft ein Saugrohr gemäß dem Oberbegriff des ersten Anspruchs.The invention relates to an intake manifold according to the preamble of the first claim.

Bei einem bekannten Saugrohr dieser Art (EP 0 433 774 A1) ist um den Außenumfang eines der teleskopierbar ineinander verschiebbar gelagerten Rohre eine den Umfang umschließende mehrfach gewendelte elektrische Leitung gelegt, deren erstes Ende zu einem an das Saugrohr anzusteckenden Saugschlauch und deren zweites Ende außen auf dem Mantel des anderen Rohres zu einem an dieses Rohr angesetzten Arbeitswerkzeug führt. Von Nachteil ist bei diesem Aufbau, daß sich die elektrische Leitung in unkontrollierter Weise durch ihr Eigengewicht nach unten ausstreckt und sich dadurch eng an den jeweiligen Mantel des Rohres anlegt. Dadurch kann die freie Beweglichkeit der Rohre behindert werden. Für die Halterung der elektrischen Leitung sind daher besondere Halteelemente erforderlich.In a known suction pipe of this type (EP 0 433 774 A1) is one of the telescopic one around the outer circumference slidably mounted pipes enclosing the circumference multiple coiled electrical wire, whose first end to be connected to the intake manifold Suction hose and its second end on the outside of the jacket of the other tube to one attached to this tube Tool leads. The disadvantage of this construction is that the electrical line is in an uncontrolled manner stretches downward by its own weight and itself thereby fits closely to the respective jacket of the pipe. This can hinder the free movement of the pipes become. For holding the electrical wire therefore special holding elements required.

Der Erfindung liegt die Aufgabe zugrunde, bei einem Saugrohr gemäß dem Oberbegriff des ersten Anspruchs Maßnahmen zu treffen, durch welche eine freie Beweglichkeit des gewendelten Abschnitts der elektrischen Leitung erreicht wird. The invention is based, with one Intake pipe according to the preamble of the first claim To take measures by which a free mobility of the coiled section of the electrical line is achieved.

Die Lösung dieser Aufgabe erfolgt gemäß der Erfindung durch die kennzeichnenden Merkmale des ersten Anspruchs.This object is achieved according to the invention by the characteristic features of the first claim.

EP-A-0 395 908 zeigt ein Sangrohr, das aus teleskopierbaren Teilen besteht und eine elektrische Leitung einschließt, die ein ausdehnbares Wendelkabel in einem der Rohre aufweist.EP-A-0 395 908 shows a singing tube which consists of telescopic Share exists and includes an electrical line that a has expandable spiral cable in one of the tubes.

Bei einem Aufbau eines Saugrohres gemäß der Erfindung kann eine mit im Vergleich zum Rohrdurchmesser geringen Wendeldurchmesser hergestellte Wendelleitung in einen Hohlraum zwischen dem Außenrohr und dem Innenrohr eingebracht werden, in dem sie frei und nur an ihren Außenseiten an den Innenseiten des Hohlraums geführt ist. Dabei ist ein Ende der Wendelleitung im Bereich des Endabschnitts des Innenrohres festgelegt, der in das Außenrohr eintaucht. Dagegen ist das zweite Ende im Bereich des Endabschnitts des Außenrohres gehalten, der das Innenrohr übergreift. Beim Zusammenschieben der beiden Rohre wird somit die Wendelleitung gestreckt, wobei sich der wirksame Wendungsdurchmesser verkleinert und die freie Beweglichkeit im Hohlraum erhalten bleibt. Bei in der Länge auseinander gezogenen Rohren kehrt die Wendelleitung dagegen in ihre axial zusammengezogene Ausgangslage zurück. Hierbei ist es jedoch auch möglich, die Wendelleitung mechanisch so vorzuspannen, daß sie im Ruhezustand in eine gestreckte Ausgangslage übergeht und bei ausgezogenen Rohren so gestaucht wird, daß die einzelnen Windungen eng aneinander zu liegen kommen. Um den für die Unterbringung der Wendelleitung vorgesehenen Hohlraum abzudichten, kann am Endabschnitt des Innenrohres eine Gleitlasche vorgesehen sein, die in eine dem Hohlraum entsprechende radial nach außen gerichtete und in Rohrlängsachse verlaufende Ausformung des Außenrohres dicht eingreift, wie auch dieser innenliegende Endabschnitt des Innenrohres an seinem übrigen Umfang dichtend am Innenmantel des Außenrohres anliegt. Auch der das Innenrohr umgreifende Endabschnitt des Außenrohres liegt dichtend am Außenumfang des Innenrohes an, wobei auch die als Rille ausgebildete Ausformung stirnseitig geschlossen ist, so daß auch in diesem Endabschnitt eine rundum laufende Abdichtung zwischen den Rohren gegeben ist. Die für die Aufnahme der Wendelleitung erforderliche Rille kann auch als radial nach innen gerichtete Einformung in den Mantel des Innenrohres verlagert werden. Dann greift in analoger Weise eine Gleitlasche des Außenrohres in diese Rille zur Abdichtung ein, wenn nicht der Dichtungsabschluß im Bereich des eintauchenden Endabschnitts des Innenrohres ausreicht. Der Hohlraum kann jedoch auch durch Prägungen am Innenrohr wie am Außenrohr dargestellt werden. Reicht die Verformbarkeit der Rohres nicht für die Darstellung der jeweils notwendigen Rille aus, dann kann das Außenrohr auch mit einem Längsschlitz versehen werden, der mittels eines gewölbten Rinnenprofilstücks abgeschlossen wird, welches im Bereich des Durchbruchs am betreffenden Rohr beispielsweise durch Schweißen festgesetzt werden kann. Es ist jedoch auch möglich das Rinnenprofil mittels U-förmiger Seitennuten an den betreffenden Schlitzwänden festzusetzen. In diesem Fall ist es zweckmäßig, das Profilstück aus Kunststoff herzustellen, das gegenüber der Wendelleitung als elektrischer Isolator dient, falls die Wendelleitung im Betrieb einen Isolationsschaden erleiden sollte.When building a suction pipe according to the invention one with small compared to the pipe diameter Coil diameter manufactured in a Cavity between the outer tube and the inner tube be introduced in which they are free and only on their outer sides is guided on the inside of the cavity. There is one End of the spiral line in the area of the end section of the Fixed inner tube that dips into the outer tube. In contrast, the second end is in the area of the end section held the outer tube, which overlaps the inner tube. When pushing the two pipes together, the Spiral line stretched, the effective Turning diameter reduced and the free mobility remains in the cavity. When apart in length drawn pipes, on the other hand, the spiral cable returns to theirs axially contracted starting position back. Here it is however also possible, the spiral line mechanically so pretension that they are at rest in a stretched Starting position passes and so with pipes pulled out it is compressed that the individual turns close together come to rest. In order to accommodate the To seal the provided conduit can on End portion of the inner tube provided a slide tab be in a radial direction corresponding to the cavity externally directed and running in the pipe longitudinal axis Shape of the outer tube engages tightly, like this one inner end portion of the inner tube at its remaining circumference sealing on the inner jacket of the outer tube is present. Also the end section encompassing the inner tube of the outer tube lies sealingly on the outer circumference of the Raw inside, including the one designed as a groove Forming is closed on the end, so that also in this end section an all-round seal between the tubes. The for the inclusion of the The spiral line required groove can also be called radial internal molding in the jacket of the inner tube be relocated. Then one intervenes in an analogous manner Slide tab of the outer tube into this groove for sealing a, if not the seal in the area of immersed end portion of the inner tube is sufficient. Of the However, cavity can also be created by embossing on the inner tube be shown on the outer tube. Enough deformability the tube is not for the representation of each necessary groove, then the outer tube can also with be provided with a longitudinal slot, which by means of a arched channel profile piece is completed, which in Area of the breakthrough on the pipe in question, for example can be fixed by welding. However, it is also possible the channel profile by means of U-shaped side grooves to fix the relevant diaphragm walls. In this case it is advisable to make the plastic profile piece produce that as compared to the spiral line electrical insulator is used if the spiral cable in Operation should suffer insulation damage.

Die Wendelleitung kann an ihrem ersten Ende mit einem vorzugsweise einstückig damit verbundenen zusätzlichen elektrischen Leitungsabschnitt verbunden sein, der vom übergriffenen Endabschnitt des Innenrohres am Innenrohr in den Bereich des freien Endes des Innenrohres zu einer dort vorgesehenen Anschlußstelle führt. Vom zweiten Ende der Wendelleitung führt ein ebenfalls vorzugsweise einstückig damit verbundener weiterer elektrischer Leitungsabschnitt zum freien Ende des Außenrohres und zu einer dort vorgesehenen zweiten Anschlußstelle. Für die Verlegung der Leitungsabschnitte können in das Innenrohr wie in das Außenrohr angepaßte Sicken eingedrückt werden, die als mechanischer Schutz für diese Leitungsabschnitte dienen. Dabei kann eine nach innen geprägte Sicke im Außenrohr den weiteren Leitungsabschnitt aufnehmen und zugleich in eine angepaßte Längssicke des Innenrohres eingreifen und so als Verdrehsicherung zwischen beiden Rohren dienen.At its first end, the spiral line can be connected to a preferably integrally connected additional electrical line section connected by the overlapped end section of the inner tube on the inner tube in the area of the free end of the inner tube to one there provided connection point leads. From the second end of the Spiral line also preferably leads in one piece connected further electrical line section to the free end of the outer tube and to one there provided second junction. For laying the Pipe sections can be in the inner tube as in the Outer tube adapted beads are pressed in as provide mechanical protection for these line sections. An inwardly embossed bead in the outer tube can record another line section and at the same time in one intervene adapted longitudinal bead of the inner tube and so as Serve against rotation between the two pipes.

An Stelle von kreisförmigen Windungen kann die Wendelleitung auch aus flach und zick-zackförmigen aneinander anschließenden Wendelstegen bestehen, die insbesondere der Rohrkrümmung entsprechend gewölbt sind, so daß der Hohlraum in radialer Richtung entsprechend niedrig ausgebildet werden kann und die Sicke/n entsprechend flach ausgebildet werden können. Die Darstellung des Hohlraums läßt sich dann mit geringerer Verformungsarbeiten des oder der Rohre bewerkstelligen. Im Bereich des übergreifenden Endabschnitts des Außenrohres kann eine Verriegelungsmechanik mit dem nach außen gerichteten Teil der Rille des Außenrohres baulich vereinigt werden, so daß ein geschlossener Aufbau erreicht wird, der ggf. notwendige elektrische Verbindungsanschlüsse zwischen der Wendelleitung und dem weiteren Leitungsabschnitt aufnehmen kann.Instead of circular turns, the Spiral cable also made of flat and zigzag shaped contiguous spiral webs exist that are curved in particular in accordance with the pipe bend, so that the cavity is correspondingly low in the radial direction can be formed and the bead (s) correspondingly flat can be trained. The representation of the cavity can then with less deformation work of the or of the pipes. In the area of overarching End section of the outer tube can be a Locking mechanism with the part facing outwards the groove of the outer tube can be structurally combined so that a closed structure is achieved, which may be necessary electrical connection connections between the Take up the spiral line and the further line section can.

Die Erfindung ist nachfolgend anhand der Prinzipskizze eines Ausführungsbeispiels näher erläutert.The invention is based on the schematic diagram of an embodiment explained in more detail.

Es zeigen:

  • Fig. 1 ein Teleskoprohr mit integrierter Wendelleitung in einem prinzipiellen Längs schnitt und
  • Fig 2 einen Querschnitt durch die Anordnung nach Fig. 1 im Bereich der Wendelleitung.
  • Show it:
  • Fig. 1 is a telescopic tube with an integrated spiral line in a basic longitudinal section and
  • 2 shows a cross section through the arrangement according to FIG. 1 in the area of the helical line.
  • Ein teleskopierbares Saugrohr für Staubsauger, an das elektrisch betriebene Zusatzgeräte anzuschließen sind, weist ein Innenrohr 1 und ein im Durchmesser größeres Außenrohr 2 auf, wobei das Innenrohr 1 in axialer Richtung längsverschiebbar im Außenrohr 2 über zwischengefügte Ringdichtungen 3 gelagert ist. Zwischen dem Innenrohr 1 und dem Außenrohr 2 ist ein Hohlraum 4 ausgebildet, in dem eine vorzugsweise zweiadrige, in kreisförmigen Windungen gewendelte elektrische Leitung untergebracht ist, deren Wendelachse parallel zur Rohrlängsachse verläuft. Der Hohlraum 4 kann bei unverformtem Innenrohr 1 durch eine radial nach außen gerichtete, über den Verschiebeweg des Innenrohres und die Länge der gestauchten Wendelleitung 5 reichende, radial nach außen gerichtete und in den Mantel des Außenrohres 2 geprägte Rille 6 gebildet sein, deren Querschnitt für die Aufnahme der Wendelleitung ausreichend groß bemessen ist, so daß die Wendelleitung 5 darin frei gedehnt und gestaucht werden kann. Zur Abdichtung des die Wendelleitung 5 aufnehmenden Hohlraums 4 gegenüber dem freien Innenraum des Außenrohres ist an den vom Außenrohr 2 übergriffenen Endabschnitt 7 des Innenrohres eine radial in die Rille 6 eingreifende, ggf. lösbare Gleitlasche 8 angesetzt, die einen dichten Abschluß über den freien Verschiebeweg innerhalb der Rille 6 gewährleistet. Die als Ausformung des Außenrohres 2 ausgebildete Rille 6 ist am das Innenrohr 1 übergreifenden Endabschnitt 9 durch eine angepaßte, ggf. abnehmbare Abschlußwand 10 verschlossen und wie der übrige Endabschnitt durch die zugeordnete Ringdichtung 3 gegenüber dem Außenmantel des Innenrohres 1 weitgehend staub- und luftdicht abgeschlossen.A telescopic suction pipe for vacuum cleaners, to which electrically operated additional devices are to be connected, has an inner tube 1 and a larger in diameter Outer tube 2, the inner tube 1 in the axial direction longitudinally displaceable in the outer tube 2 via interposed Ring seals 3 is mounted. Between the inner tube 1 and the outer tube 2 is formed a cavity 4 in which a preferably two-core, in circular turns coiled electrical line is housed whose Spiral axis runs parallel to the pipe longitudinal axis. Of the Cavity 4 can with an undeformed inner tube 1 by a radially outward, over the displacement of the Inner tube and the length of the compressed spiral line 5 reaching, radially outward and into the mantle of the outer tube 2 embossed groove 6 are formed, the Cross section sufficient to accommodate the helical cable is large, so that the spiral line 5 is free can be stretched and compressed. To seal the Spiral line 5 receiving cavity 4 opposite The free interior of the outer tube is at the outer tube 2 overlapped end section 7 of the inner tube a radially in groove 6 engaging, possibly detachable, slide tab 8 scheduled that a tight conclusion on the free Travel within the groove 6 guaranteed. As Formation of the outer tube 2 formed groove 6 is on the inner tube 1 overlapping end section 9 by a adapted, if necessary removable end wall 10 closed and like the rest of the end section by the assigned Ring seal 3 with respect to the outer jacket of the inner tube 1 largely sealed dust and airtight.

    Ein erstes Ende 11 der Wendelleitung 5 ist über Klemm- oder Lötstücke, jedoch vorzugsweise einstückig mit einem zusätzlichen Leitungsabschnitt 12 verbunden, der durch die Gleitlasche 8 oder den benachbarten Endabschnitt 7 des Innenrohres in das Innenrohr 1 hinein und an dessen Innenmantel in den Bereich des freien Endes 13 des Innenrohres und dort nach außen zu einer ersten Anschlußstelle 14 mit Steckkontakten 15 geführt. Dieser zusätzliche Leitungsabschnitt 12 kann jedoch auch von außen in einer vorzugsweise nach innen gerichteten Längssicke 16 des Innenrohres verlegt sein, wobei die nach außen offene Längssicke 16 beispielsweise mit einem Isolierstoff ausgegossen ist und die runde Kontur des Außenrohres ergänzt. Wird diese Längssicke nach außen gerichtet, kann der zusätzliche Leitungsabschnitt innerhalb des Innenrohres 1 eingelegt und mittels einer Schutzabdeckung gegen mechanische Beschädigung geschützt werden. Diese Längssicke kann dabei in eine angepaßte Längssicke des Außenrohres eingreifen und so als Verdrehsicherung zwischen beiden Rohren 1, 2 ausgenutzt werden. Das dem freien Ende 13 des Innenrohres zugewandte zweite Ende 17 der Wendelleitung 5 ist im Bereich der Abschlußwand 10 der Rille 6 am Außenrohr 2 festgesetzt und geht vorzugsweise ebenfalls einstückig in einen weiteren Leitungsabschnitt 18 über, der am Außenrohr 2 zu einer dem freien Ende 19 des Außenrohres 2 zugeordneten zweiten Anschlußstelle 20 mit Anschlußkontakten 21 geführt ist. Für den weiteren Leitungsabschnitt 18 kann das Außenrohr 2 eine entsprechende Längssicke 22 aufweisen, die neben dem Hohlraum 4 bzw. entlang der Rille 6 verläuft. Sie kann entweder nach außen ausgeformt sein, wie es in Fig. 2 rechts neben der Rille 6 dargestellt wird. Sie kann jedoch auch radial nach innen gerichtet sein, wie es in Fig. 2 links neben der Rille 6 dargestellt ist. Dann wird der weitere Leitungsabschnitt 18 von außen eingelegt und kann darin z. B. durch eine Abdeckung geschützt festgelegt werden. Eine der nach innen eingeprägten Längssicke angepaßte, in den Mantel des Innenrohres 1 eingeformte Führungssicke 23 dient dann als Verdrehsicherung zwischen den Rohren 1, 2.A first end 11 of the helical line 5 is via clamping or Solder pieces, but preferably in one piece with one additional line section 12 connected by the Slide tab 8 or the adjacent end portion 7 of the Inner tube into the inner tube 1 and at the Inner jacket in the region of the free end 13 of the Inner tube and there to the outside to a first Junction 14 out with plug contacts 15. This additional line section 12 can, however, also from the outside in a preferably inwardly directed longitudinal bead 16 of the inner tube, the open to the outside Longitudinal bead 16, for example with an insulating material is poured out and the round contour of the outer tube added. If this longitudinal bead is directed outwards, you can the additional line section within the inner tube 1 inserted and by means of a protective cover against mechanical damage are protected. This longitudinal bead can in an adapted longitudinal bead of the outer tube intervene and so as an anti-rotation between the two Pipes 1, 2 are used. That the free end 13 of the Inner tube facing second end 17 of the spiral line 5 is in the region of the end wall 10 of the groove 6 on the outer tube 2 set and preferably also goes in one piece a further line section 18 on the outer tube 2 to a the free end 19 of the outer tube 2 assigned second connection point 20 with Connection contacts 21 is guided. For the rest Line section 18, the outer tube 2 a have corresponding longitudinal bead 22, which in addition to the Cavity 4 or runs along the groove 6. she can either be shaped outwards, as is shown in FIG. 2 is shown to the right of the groove 6. However, it can also be directed radially inwards, as is shown in FIG. 2 is shown to the left of the groove 6. Then the further line section 18 inserted from the outside and can therein z. B. protected by a cover become. One of the longitudinal beads embossed on the inside adapted, molded into the jacket of the inner tube 1 Guide bead 23 then serves as an anti-rotation between the pipes 1, 2.

    Ausgehend von der in Fig. 1 dargestellten ausgezogenen Lage des Saugrohres befindet sich die Wendelleitung 5 im Hohlraum 4 in ihrer axial ungestreckten Lage. Wird das Außenrohr 2 axial weiter auf das Innenrohr 1 aufgeschoben, dann wandert auch die Abschlußwand 10 und damit das zweite Ende 17 der Wendelleitung 5 zum freien Ende 13 des Innenrohres 1 hin. Da das erste Ende 11 der Wendelleitung 5 am Innenrohr 1 festgelegt ist, wird die Wendelleitung 4 axial gedehnt und dient so als elastisches Verbindungsglied zwischen den elektrischen Leitungsabschnitten 12 und 18, die am Innenrohr 1 bzw. am Außenrohr 2 festgelegt sind. Die stromleitende Verbindung zwischen den Anschlußstellen 14 und 20 bleibt dadurch über, den axialen Verschiebeweg der Rohre 1, 2 sicher erhalten, wobei die Wendelleitung 5 durch ihre eigene Isolierung sicherstellt, daß kein elektrischer Schluß mit den insbesondere aus Metall bestehenden Rohren 1, 2 entstehen kann. Sollte eine derartige Gefährdung zu befürchten sein, kann die Sicke 6 und der von ihr überdeckte Mantelteil des Innenrohres mit einer zusätzlichen elektrischen isolierenden Beschichtung versehen sein. Beim Auseinanderziehen der Rohre 1, 2 wird die Wendelleitung 5 wieder in ihre dargestellte Lage zurück geschoben. Bei dieser Ausführungsform sind somit keine störanfälligen Schleifkontakte erforderlich.Starting from the extended position shown in Fig. 1 of the suction pipe, the helical line 5 is in the Cavity 4 in its axially undrawn position. Will that Outer tube 2 pushed axially further onto inner tube 1, then the end wall 10 and thus the second migrates End 17 of the helical line 5 to the free end 13 of the Inner tube 1 down. Since the first end 11 of the helical line 5 is fixed to the inner tube 1, the helical line 4 axially stretched and thus serves as an elastic connecting link between the electrical line sections 12 and 18, which are fixed on the inner tube 1 or on the outer tube 2. The Current-conducting connection between the connection points 14 and 20 remains thereby, the axial displacement of the Get pipes 1, 2 safely, with the spiral line 5 through their own insulation ensures that no electrical No more pipes, especially those made of metal 1, 2 can arise. Should such a hazard arise the bead 6 and that of it can be feared covered part of the inner tube with a additional electrical insulating coating be provided. When the pipes 1, 2 are pulled apart the spiral line 5 back into its position shown pushed. In this embodiment there are therefore none fault-prone sliding contacts required.

    Die Wendelleitung 5 kann auch dadurch gebildet werden, daß der Leitungszug nicht spiralig aufgewickelt, sondern flach und zick-zack-förmig gefaltet wird, wobei diese Faltung dauerhaft erhalten bleibt und elastisch nach einer Dehnung sich selbst in die Ausgangslage zurück zusammenzieht. Dabei können die Wendelsteg der Rohrkrümmung angepaßt gewölbt werden, so daß der Hohlraum 4 bei vergrößerter Erstreckung in Umfangsrichtung sich im wesentlichen in seiner radialen Abmessung auf die Größe des Durchmessers der einzelnen Wendelstege beschränken kann. Derartige flache Prägungen lassen sich an Rohren mit vereinfachtem Aufwand ausführen.The helical line 5 can also be formed in that the cable is not wound spirally, but flat and is folded in a zigzag shape, this folding remains permanently and elastic after stretching contracts itself back to the starting position. Here the spiral bar can be curved to match the pipe curvature be so that the cavity 4 with an enlarged extension in the circumferential direction essentially in its radial Dimension to the size of the diameter of each Spiral bars can restrict. Such flat embossing can be carried out on pipes with simplified effort.

    Die dem Außenrohr 2 zugeordnete Rille 6 kann in einen Betätigungsmechanismus 24 zur Verriegelung der Rohre 1, 2 in unterschiedlichen axialen Stellungen integriert sein, so daß insgesamt ein geschlossener Aufbau erreicht wird.The groove 6 assigned to the outer tube 2 can be in one Actuating mechanism 24 for locking the pipes 1, 2 be integrated in different axial positions, so that overall a closed structure is achieved.

    An Stelle einer einstückig ausgebildeten Ausprägung zur Darstellung der Rille 6 kann auf den Mantel des Außenrohres 2 auch ein nach außen gewölbtes Rinnenprofilstück aufgesetzt werden, das an beiden Enden geschlossen ist und einen angepaßten Längsschnitt des Außenrohres 2 überdeckt. Dabei braucht das Außenrohr 2 im Bereich der Rille 6 lediglich für den Durchtritt des zusätzlichen Leitungsabschnitts geschlitzt zu sein, während das andere Ende der Wendelleitung 5 weiterhin an dem Ende der Rille 6 festgelegt ist, das dem freien Ende 13 des Innenrohres 1 zugewandt ist. Es ist aber auch möglich, das Innenrohr 1 mit einer nach innen gerichteten und/oder das Außenrohr mit einer nach außen gerichteteten, in Rohrlängsrichtung verlaufenden Rille zu versehen, so daß insgesamt eine für die Aufnahme der Wendelleitung 5 ausreichender Hohlraum 4 geschaffen ist. Diese Teilrillen sind ebenfalls endseitig verschlossen, wobei den Gleitlaschen 8, 10 entsprechende Gleitelemente an den Rohren 1, 2 in die Rille des jeweils anderen Rohres dicht eintauchen.Instead of a one-piece design for Representation of the groove 6 can on the jacket of the outer tube 2 also a channel profile piece that is curved outwards be put on, which is closed at both ends and covers an adapted longitudinal section of the outer tube 2. The outer tube 2 needs in the region of the groove 6 only for the passage of the additional Line section to be slotted while the other End of the spiral line 5 continues at the end of the groove 6 is fixed, the free end 13 of the inner tube 1st is facing. However, it is also possible for the inner tube 1 with an inward facing and / or the outer tube with one directed outwards, in the longitudinal direction of the pipe running groove to provide a total of one for the inclusion of the spiral line 5 sufficient cavity 4th is created. These partial grooves are also at the ends closed, the slide plates 8, 10 corresponding Sliding elements on the tubes 1, 2 in the groove of each immerse the other tube tightly.

    Claims (13)

    1. Suction tube, more particularly for vacuum cleaners, with inner and outer tubes which engage in one another in the manner of a telescope and are longitudinally displaceable relative to one another, and with an insulated electrical conductor extending in the direction of the longitudinal axis of the tube, characterised in that the conductor is at least partially helical and a cavity (4) is provided between the inner tube (1) and the outer tube (2), extends over the displacement path and is sealed at its ends, the helical or zigzag-shaped conductor (5) being arranged in said cavity.
    2. Suction tube according to claim 1, characterised in that one end (11) of the helical conductor (5) is secured to the end section (7) of the inner tube (1) enclosed by the outer tube (2) and the second end (17) of the helical conductor (5) is secured to the outer tube (2) in the region of the end (9) of the cavity (4) remote from the end section (7).
    3. Suction tube according to claim 1 or 2, characterised in that the inner tube (1) comprises an additional electrical conductor section (12), which extends from the free end (13) from outside the tube section which is to be overlapped by the outer tube (2) to the end (11) of the helical conductor (5) connected to the inner tube (1) and is electrically connected to said end (11).
    4. Suction tube according to claim 1 or one of the following, characterised in that an outwardly curved channel profile element, which is closed at both ends, is fitted onto the cylindrical surface of the outer tube (2).
    5. Suction tube according to claim 4, characterized in that the outer tube (2) is axially slotted in the region of the channel (6) for the passage of the conductor section (12) and the other end (17) of the helical conductor (5) is secured to the end of the channel (6) facing the free end (13) of the inner tube (1).
    6. Suction tube according to claim 1, 2 or 3, characterised in that the inner tube (1) comprises an inwardly pointing and/or the outer tube (2) comprises an outwardly pointing channel extending in the longitudinal direction of the tube, the helical conductor (5) is arranged in the cross section of the optionally commonly formed channel, a sliding tongue (8, 10) secured to a tube (1, 2) and closing the cross section of the channel (6) is arranged in the region of at least one of the overlapping ends (7, 9) of the tubes, and the ends (11, 17) of the helical conductor (5) are secured in each case in the region of the overlapping ends (7, 9) of the tubes (1, 2).
    7. Suction tube according to claim 6, characterized in that a further electrical conductor section (18) is associated with the outer tube (2), is electrically connected to the end (17) of the helical conductor (5) secured to the outer tube (2) and is guided into the region of the free end (19) of the outer tube (2).
    8. Suction tube according to claim 6 or 7, characterized in that the additional conductor section (12) is laid in a longitudinal groove (16) in the inner tube (1).
    9. Suction tube according to claim 6 or one of the following, characterised in that the further conductor section (18) is laid in a longitudinal groove (22) in the outer tube (2).
    10. Suction tube according to claim 8 or 9, characterised in that the longitudinal grooves (16, 22) are imprinted in an inward direction.
    11. Suction tube according to claim 9 or 10, characterised in that the longitudinal groove (22) in the outer tube (2) engages in a matching axial furrow (23) in the inner tube (1).
    12. Suction tube according to claim 1 or one of the following, characterised in that the coiling of the conductor (5) is flat or zigzag-shaped.
    13. Suction tube according to claim 12, characterised in that the coil webs are curved to match the curvature of the tube.
    EP94116619A 1994-01-31 1994-10-21 Telescopic suction tube with a helical electric conductor Expired - Lifetime EP0664988B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    DE4402835A DE4402835C2 (en) 1994-01-31 1994-01-31 Telescopic suction pipe with electrical cable
    DE4402835 1994-01-31

    Publications (2)

    Publication Number Publication Date
    EP0664988A1 EP0664988A1 (en) 1995-08-02
    EP0664988B1 true EP0664988B1 (en) 1999-03-31

    Family

    ID=6509085

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP94116619A Expired - Lifetime EP0664988B1 (en) 1994-01-31 1994-10-21 Telescopic suction tube with a helical electric conductor

    Country Status (2)

    Country Link
    EP (1) EP0664988B1 (en)
    DE (2) DE4402835C2 (en)

    Cited By (2)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE10314800B3 (en) * 2003-04-01 2004-05-19 Fischer Rohrtechnik Gmbh Combined telescopic suction tube and electrical cable holder for vacuum cleaner, holds plug, socket and cable assembly in casing sections on suction tube with sliding lock
    DE102004004009A1 (en) * 2004-01-27 2005-08-18 Fischer Rohrtechnik Gmbh A method by which electrical connection may be made over a telescopic vacuum cleaner hose has a spiral wound cable which is protected by telescopic covers

    Families Citing this family (6)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    CA2174050C (en) * 1995-04-21 2001-07-17 Sadahiro Shimada Electric vacuum cleaner
    ES2221943T3 (en) * 1996-08-13 2005-01-16 Bsh Bosch Und Siemens Hausgerate Gmbh ADJUSTABLE ELECTRICAL CONNECTION DEVICE FOR ASPIRATOR TELESCOPIC TUBE.
    DE19638976A1 (en) * 1996-09-23 1998-03-26 Bosch Siemens Hausgeraete Adjustable conductor arrangement for telescopic tube of vacuum cleaner
    PL181955B1 (en) * 1996-10-28 2001-10-31 Zelmer Telescoped suction tube for vacuum cleaners
    DE19652647C1 (en) * 1996-12-18 1997-12-18 Fischer Rohrtechnik Gmbh Vacuum cleaner telescopic dust suction tube contg. electrically conducting cable
    GB0425626D0 (en) * 2004-11-22 2004-12-22 Hoover Ltd Wand assemblies for vacuum cleaners

    Family Cites Families (7)

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    Publication number Priority date Publication date Assignee Title
    US4094535A (en) * 1977-01-10 1978-06-13 The Hoover Company Conductive hose and ends
    GB1551605A (en) * 1977-02-07 1979-08-30 Dayco Corp Flexible hose
    DE7915432U1 (en) * 1979-05-29 1979-09-06 Vorwerk & Co Interholding Gmbh, 5600 Wuppertal TELESCOPIC GUIDE HANDLE FOR HOUSEHOLD APPLIANCES
    DE8019985U1 (en) * 1980-07-25 1980-10-30 Vorwerk & Co Interholding Gmbh, 5600 Wuppertal TELESCOPICABLE SUCTION PIPE
    DE3914840A1 (en) * 1989-05-05 1990-11-08 Vorwerk Co Interholding TELESCOPICOUS GUIDE FOR FLOOR MAINTENANCE EQUIPMENT
    DE3941767A1 (en) * 1989-12-18 1991-06-20 Mauz & Pfeiffer Progress DEVICE FOR HOLDING AN ELECTRICAL LINE TO A VACUUM CLEANER PIPE AND / OR HOSE
    EP0537457B1 (en) * 1991-10-14 1995-12-20 AEG Hausgeräte GmbH Vacuum cleaner adjustable length tube

    Cited By (3)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE10314800B3 (en) * 2003-04-01 2004-05-19 Fischer Rohrtechnik Gmbh Combined telescopic suction tube and electrical cable holder for vacuum cleaner, holds plug, socket and cable assembly in casing sections on suction tube with sliding lock
    DE102004004009A1 (en) * 2004-01-27 2005-08-18 Fischer Rohrtechnik Gmbh A method by which electrical connection may be made over a telescopic vacuum cleaner hose has a spiral wound cable which is protected by telescopic covers
    DE102004004009B4 (en) * 2004-01-27 2006-02-02 Fischer Rohrtechnik Gmbh Telescopic vacuum cleaner suction tube with an electrically conductive cable guided in cable ducts

    Also Published As

    Publication number Publication date
    EP0664988A1 (en) 1995-08-02
    DE59408040D1 (en) 1999-05-06
    DE4402835A1 (en) 1995-08-03
    DE4402835C2 (en) 1997-09-18

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