EP0293518A1 - Telescopic vacuum cleaner suction hose - Google Patents

Telescopic vacuum cleaner suction hose Download PDF

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Publication number
EP0293518A1
EP0293518A1 EP87119407A EP87119407A EP0293518A1 EP 0293518 A1 EP0293518 A1 EP 0293518A1 EP 87119407 A EP87119407 A EP 87119407A EP 87119407 A EP87119407 A EP 87119407A EP 0293518 A1 EP0293518 A1 EP 0293518A1
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EP
European Patent Office
Prior art keywords
locking
vacuum cleaner
suction pipe
cleaner suction
pipe according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP87119407A
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German (de)
French (fr)
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EP0293518B1 (en
Inventor
August 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.)
Carl Froh GmbH
Original Assignee
Carl Froh Rohrenwerk & Co GmbH
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Publication date
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Priority claimed from DE3718578A external-priority patent/DE3718578C1/en
Application filed by Carl Froh Rohrenwerk & Co GmbH filed Critical Carl Froh Rohrenwerk & Co GmbH
Priority to AT87119407T priority Critical patent/ATE72743T1/en
Publication of EP0293518A1 publication Critical patent/EP0293518A1/en
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Classifications

    • 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
    • A47L9/244—Hose or pipe couplings for telescopic or extensible hoses or pipes

Definitions

  • the invention relates to a telescopic vacuum cleaner suction tube, as has become known according to the preamble of claim 1 by US-PS 32 44 437.
  • the known vacuum cleaner suction tube is felt to be disadvantageous because a separately riveted, provided with slot-like locking recesses locking bar requires a large amount of production.
  • the known vacuum cleaner suction pipe has on the outside on the outer pipe a spring clip with a hook-shaped cut-out, projecting latching tongue as a latching body.
  • the hook-shaped latching tongue extends through the outer tube wall and can thus engage in the slots in the latching strip. Every time the length of the vacuum cleaner suction tube changes, i.e. Shortened or lengthened, an upwardly bent operating end of the spring clip must be raised to release the hook-shaped locking body from the respective locking recess. The operation of the known vacuum cleaner suction tube is perceived as in need of improvement.
  • the outer tube of the known vacuum cleaner suction tube which has a noticeably larger diameter than the inner tube, has a slant in the region of its point of overlap with the inner tube inwardly projecting ring apron with a window-like notch, which takes up the cross section of the riveted locking bar. Locking bar and window-like notch cause an axially extending positive locking to prevent relative rotation between the outer and inner tube.
  • This design of the anti-twist device further increases the already high technical manufacturing effort.
  • the object of the invention is to create a telescopic vacuum cleaner suction pipe that is simpler both in terms of production technology and in terms of operation. This object is achieved in accordance with the characterizing part of patent claim 1.
  • the locking bar which extends only over a relatively small circumferential area of the inner tube, is formed with its locking recesses in the wall of the inner tube.
  • the inner tube is a sheet steel tube
  • the locking bar can be stamped in a simple manner.
  • the inner tube is provided with an axial groove or an axial spring which is molded or impressed into the wall and which cooperate with a correlating configuration (axial spring or axial groove) of the outer tube and thus one easy to manufacture fuse against relative rotation.
  • DE-OS 31 02 898 it is only known to provide threaded ribs which extend over the entire circumference in the end region of a vacuum cleaner inner tube and which cannot be compared with the catches according to the invention.
  • the threaded ribs which are provided over a partial circumference of an outer tube of an obviously previously used telescopic vacuum cleaner suction tube and which serve for a clamping lock by means of a clamping sleeve are comparable with the arrangement according to the invention. It is also known (DE-AS 26 18 065 see FIG. 6, item 24) to provide an outer tube of a telescopic vacuum cleaner suction tube with an inwardly projecting axial rib, but this known axial rib is not used to prevent rotation between the inside - And outer tube, but rather the rotational driving of a sprag.
  • the latching body according to the invention forms a separate component that is independent of the hold-down device.
  • the hold-down device is designed as a control body, which either offers a free or escape space for the latching body when the latching body is to disengage from the respective latching recess or which holds the latching body in a certain latching recess in the event of locking.
  • the latching body according to the invention is therefore independent in its movement when the hold-down device is unlocked.
  • a telescopic vacuum cleaner suction tube is generally designated by the reference number 10.
  • the suction pipe has an inside tube 11 and an outer tube 12.
  • the outer tube 12 forms a sleeve-like widening 13.
  • a guide body 15 made of plastic with an essentially circular cross section is arranged inside the overall space designated by 14 between the inner tube outer jacket surface 34 and the outer tube inner jacket surface 33.
  • a guide body 15 Received in the guide body 15 is in each case a slide 16 (FIGS. 1 and 2,) 16a, (FIG. 3) which is translationally movable along the pipe longitudinal axis x (FIG. 3) and a slide 16b which is rotatable about the pipe longitudinal axis x along the circumferential direction u (FIGS. 4 and 5 ).
  • Each slide 16, 16a, 16b passes through the outer tube wall 13 with an actuating shoulder 17 within a recess 18.
  • Each actuating shoulder 17 in turn carries a handle 19.
  • Each inner tube 11 has a locking bar 20 with locking recesses 21.
  • the inner tube 11 and outer tube 12 are made of sheet steel.
  • the locking bar 20 with the locking recesses 21 is stamped into the inner tube wall 22 as a relatively narrow strip-like strip.
  • the embossing is in this case such that each latching recess 21 is distanced from the respectively adjacent latching recess 21 via an undeformed circular cylindrical tube wall region 23.
  • Each latching recess 21 has an acute-angled angle to the tube on one axial end side Longitudinal axis x extending sliding flank 24 for a roller-like locking body 25 (FIGS. 1 and 2), for a web-like locking body 25a (FIG. 3) or for a ball locking body 25b (FIGS. 4 and 5).
  • each locking recess 21 On the other axial end side of each locking recess 21, a locking or inhibiting flank 26 is formed with a relatively small radius of curvature.
  • each latching recess 21 on its axial end side facing the suction attachment (the suction attachment is not shown, but indicated with an S and an arrow), such as a suction brush or suction nozzle, has the curved locking or inhibiting flank 26.
  • the respective longitudinal axes of the latching recesses 21 (FIGS. 1-3) intended for elongated latching bodies 25, 25a extend secantially to the body of the inner tube 11, the cross section of which is circular-cylindrical.
  • the latching recesses 21 corresponding to FIGS. 4 and 5 are, at least in cross section according to FIG. 5, essentially spherical in shape, while the associated latching body 25b itself - as already mentioned - has a spherical shape.
  • the slider 16, 16a, 16b opens the connection to the free space 14, so that the latching body 25, 25a, 25b is able to slide out of the latching recess 21 (ie to decouple the two telescopic tubes 11, 12) as soon as a relative movement of the two telescopic tubes 11, 12 to one another is initiated.
  • the latching body 25, 25a, 25b has a relatively small mass, so that a smooth-running latching process, that is to say an easy-to-move displaceability of the two tubes 11, 12, is ensured.
  • roller-shaped latching body 25 is located in a latching recess 21 and is held down there by means of a locking lug 27 of the slide 16.
  • the locking or inhibiting flanks 26 serve, on the one hand, for a latching mark that can be felt or heard during the adjustment movement and, on the other hand, offer additional securing of the locking position (FIGS. 1, 3 to 5) also in the event that the pressure force in the direction d ( strong impact of the suction attachment S against an obstacle during suction work) should be relatively large. It is also the case in the embodiment according to FIG. 1 that when a relatively large force occurs in the direction d, an initial rolling movement of the roller body 25 causes a movement of the locking lug 27 in the direction z or g, that is to say an additional securing of the locking position. To this extent, the roller body 25 has approximately the function of a pinion rolling between two racks.
  • each latching body 25, 25a, 25b is carried along or positioned approximately in the manner of a ball cage by means of an opening 29 on the slide side.
  • the function is similar to that in the exemplary embodiment according to FIGS. 1 and 2.
  • the web-like latching body 25a is part of a rectangular bracket or frame made of wire, designated overall by 30.
  • the transverse web 31 of the bracket 30 facing away from the locking web 25a is accommodated within an elongated hole 32 on the slide side. It is conceivable that the elongated hole 32 allows the slide 16a to be displaced in the direction o, so that the locking lug 27 can establish the access of the latching body 25a to the free space 14 in order to release the locking state, as shown in FIG. 3.
  • FIGS. 4 and 5 The function of the embodiment according to FIGS. 4 and 5 is fundamentally comparable to the embodiments according to FIGS. 1 to 3, with the difference that the actuation of the slide 16b is not translatory in the direction of the longitudinal pipe thing x, but rather rotatory about the longitudinal pipe axis x around in accordance with the arrows in Fig. 5 o in the opening direction and g in the closing direction. Even with this out management example (Fig. 5), a locking lug 27 can be seen.
  • the arrangement 16, 16a, 16b, 25, 25a, 25b could be replaced by a ball catch known per se.
  • the handle 19 could be retained or even omitted.
  • the strength of the detent force would have to be varied by the restoring force of a ball detent spring, not shown, which would represent the hold-down device in this case.
  • the bracket 30 could be guided with its two longitudinal legs within the free space 14 between the outer tube inner jacket surface 33 and the inner tube outer jacket surface 34 within the guide body 15 and against the restoring force of one or two springs (hold-down device), not shown, can be disengaged from the latching recesses 21.
  • the latching body 25a and the correlating latching recesses 21 would not be arranged on the lower side of the inner tube 11, as shown in FIG.
  • the bead-like axial groove 35 would then - not as shown in Fig. 3 - provided below, but rather diametrically opposite at the top.
  • An anti-rotation device between the inner tube 11 and outer tube 12 comes about as follows: The on Outer tube 12 within the widening 13 in a manner not shown in more detail (for example by gluing), rotationally secured guide body 15 engages (see FIG. 5) with an axial spring 36 in the axial longitudinal bead 35 provided on the inner tube side. At the same time, an air seal generating incorrect air is achieved here.
  • the arrangement is otherwise such that the front outer region of the guide body 15 engages over an undeformed tube region 23 when the latching bodies 25, 25a, 25b are located in a latching recess 21.
  • the invention also provides for axial groove 35 and latching recesses 21 to be superimposed.
  • the spherical locking recesses 21 according to FIGS. 4 and 5 could be embossed in the deepest of an axial groove 35 offset circumferentially by 180 ° (the spring 36 would then also be offset).

Abstract

The suction pipe (10) has an outer pipe (12) and an inner pipe (11) which, with a deformation region, forms a catch strip (20) with catch recesses (21). A positive fit safeguard, which prevents relative rotation between the inner and the outer pipes (11, 12), has an axial groove (35) or axial spring which is machined into the respective pipe wall (22) on the inner or outer pipe. A catch body (25), forming a separate component, can be displaced into a locking or release position in relation to the respective catch recess (21) by means of the holding-down device (16) which constitutes a control body and is movable independently of the catch body (25). The suction pipe (10) allows both simple production and simple operation. <IMAGE>

Description

Die Erfindung betrifft ein teleskopierbares Staubsauger-Saugrohr, wie es entsprechend dem Oberbegriff des Patentanspruchs 1 durch die US-PS 32 44 437 bekanntgeworden ist.The invention relates to a telescopic vacuum cleaner suction tube, as has become known according to the preamble of claim 1 by US-PS 32 44 437.

Das bekannte Staubsauger-Saugrohr wird als nachteilig empfunden, weil eine gesondert aufzu­nietende, mit schlitzartigen Rastausnehmungen ver­sehene Rastleiste einen großen Fertigungsaufwand erfordert. Als Rastkörper weist das bekannte Staubsauger-Saugrohr außenseitig auf dem Außen­rohr eine Federlasche mit einer hakenförmig frei­geschnittenen nach innen vorragenden Rastzunge als Rastkörper auf. Die hakenförmige Rastzunge durchgreift die Außenrohrwandung und kann so in die Schlitze der Rastleiste eingreifen. Jedesmal, wenn die Länge des Staubsauger-Saugrohres verän­dert, d.h. verkürzt oder verlängert, werden soll, muß ein aufwärts gebogenes Bedienungsende der Federlasche angehoben werden, um den hakenförmi­gen Rastkörper aus der jeweiligen Rastausnehmung zu lösen. Die Bedienungsweise des bekannten Staub­sauger-Saugrohres wird als verbesserungsbedürftig empfunden.The known vacuum cleaner suction tube is felt to be disadvantageous because a separately riveted, provided with slot-like locking recesses locking bar requires a large amount of production. As a latching body, the known vacuum cleaner suction pipe has on the outside on the outer pipe a spring clip with a hook-shaped cut-out, projecting latching tongue as a latching body. The hook-shaped latching tongue extends through the outer tube wall and can thus engage in the slots in the latching strip. Every time the length of the vacuum cleaner suction tube changes, i.e. Shortened or lengthened, an upwardly bent operating end of the spring clip must be raised to release the hook-shaped locking body from the respective locking recess. The operation of the known vacuum cleaner suction tube is perceived as in need of improvement.

Das einen merklich größeren Durchmesser als das Innenrohr aufweisende Außenrohr des bekannten Staubsauger-Saugrohrs weist im Bereich seiner Überlappungsstelle mit dem Innenrohr eine schräg nach innen ragende Ringschürze mit einer fenster­artigen Ausklinkung auf, welche den Querschnitt der aufgenieteten Rastleiste aufnimmt. Rastleiste und fensterartige Ausklinkung bewirken hierbei eine sich axial erstreckende Formschlußsicherung zur Verhinderung einer Relativdrehung zwischen Außen- und Innenrohr. Durch diese Ausbildung der Verdrehsicherung wird der ohnehin hohe technische Fertigungsaufwand zusätzlich vergrößert.The outer tube of the known vacuum cleaner suction tube, which has a noticeably larger diameter than the inner tube, has a slant in the region of its point of overlap with the inner tube inwardly projecting ring apron with a window-like notch, which takes up the cross section of the riveted locking bar. Locking bar and window-like notch cause an axially extending positive locking to prevent relative rotation between the outer and inner tube. This design of the anti-twist device further increases the already high technical manufacturing effort.

Ausgehend von dem eingangs beschriebenen be­kannten teleskopierbaren Staubsauger-Saugrohr (US-PS 32 44 437), liegt der Erfindung die Auf­gabe zugrunde, ein sowohl in fertigungstech­nischer als auch in bedienungstechnischer Hin­sicht einfacheres teleskopierbares Staubsauger-­Saugrohr zu schaffen. Diese Aufgabe wird entspre­chend dem Kennzeichenteil des Patentanspruchs 1 gelöst.Starting from the known telescopic vacuum cleaner suction pipe (US Pat. No. 3,244,437) described at the outset, the object of the invention is to create a telescopic vacuum cleaner suction pipe that is simpler both in terms of production technology and in terms of operation. This object is achieved in accordance with the characterizing part of patent claim 1.

Entsprechend der Erfindung ist die sich nur über einen verhältnismäßig geringen Umfangsbe­reich des Innenrohrs erstreckende Rastleiste mit ihren Rastausnehmungen in die Wandung des Innen­rohres eingeformt. Für den Fall, daß das Innen­rohr ein Stahlblechrohr ist, kann die Rastleiste auf einfache Weise eingeprägt sein. Auf ähnlich einfache Weise erhält das Innenrohr eine in die Wandung eingeformte bzw. eingeprägte Axialnut bzw. eine Axialfeder, welche mit einer korre­lierenden Ausgestaltung (Axialfeder oder Axial­nut) des Außenrohres zusammenwirken und so eine einfach herzustellende Sicherung gegen Relativ­drehung bilden kann. Bekannt ist es entsprechend der DE-OS 31 02 898 nur, im Endbereich eines Staubsauger-Innenrohres sich über den Gesamtum­fang erstreckende Gewinderippen vorzusehen, die mit den erfindungsgemäßen Rasten nicht zu verglei­chen sind. Ebenso sind die über einen Teilumfang eines Außenrohrs eines offenkundig vorbenutzten teleskopierbaren Staubsauger-Saugrohrs vorge­sehenen Gewinderippen, die einer Klemmarretierung mittels einer Klemmuffe dienen, mit der erfin­dungsgemäßen Anordnung vergleichbar. Zwar ist es auch bekannt (DE-AS 26 18 065 s. dort Fig. 6, Pos. 24), ein Außenrohr eines teleskopierbaren Staubsauger-Saugrohres mit einer nach innen vor­springenden Axialrippe zu versehen, jedoch dient diese bekannte Axialrippe nicht der Verdrehsiche­rung zwischen Innen- und Außenrohr, sondern viel­mehr der Drehmitnahme eines Klemmkörpers.According to the invention, the locking bar, which extends only over a relatively small circumferential area of the inner tube, is formed with its locking recesses in the wall of the inner tube. In the event that the inner tube is a sheet steel tube, the locking bar can be stamped in a simple manner. In a similarly simple manner, the inner tube is provided with an axial groove or an axial spring which is molded or impressed into the wall and which cooperate with a correlating configuration (axial spring or axial groove) of the outer tube and thus one easy to manufacture fuse against relative rotation. According to DE-OS 31 02 898, it is only known to provide threaded ribs which extend over the entire circumference in the end region of a vacuum cleaner inner tube and which cannot be compared with the catches according to the invention. Likewise, the threaded ribs which are provided over a partial circumference of an outer tube of an obviously previously used telescopic vacuum cleaner suction tube and which serve for a clamping lock by means of a clamping sleeve are comparable with the arrangement according to the invention. It is also known (DE-AS 26 18 065 see FIG. 6, item 24) to provide an outer tube of a telescopic vacuum cleaner suction tube with an inwardly projecting axial rib, but this known axial rib is not used to prevent rotation between the inside - And outer tube, but rather the rotational driving of a sprag.

Im Unterschied zum eingangs beschriebenen teleskopierbaren Staubsauger-Saugrohr (US-PS 30 44 437) bildet der erfindungsgemäße Rastkörper ein vom Niederhalter unabhängiges gesondertes Bau­teil. Der Niederhalter ist als Steuerkörper ausge­bildet, welcher entweder dem Rastkörper einen Frei- bzw. Ausweichraum bietet, wenn der Rastkör­per aus der jeweiligen Rastausnehmung ausrasten soll oder welcher im Falle der Verriegelung den Rastkörper in einer bestimmten Rastausnehmung hält. Der erfindungsgemäße Rastkörper ist daher bei entriegeltem Niederhalter in seiner Bewegung unabhängig. Auf diese Weise wurde - im Unter­ schied zum Gegenstand der US-PS 32 44 437 - mit der Erfindung die grundsätzliche Möglichkeit ge­schaffen, die teleskopierbare Staubsauger-Saug­rohr-Verbindung zumindest in einer Richtung (vor­zugsweise im Sinne einer Rohrverlängerung) ohne ständige Manipulation einer Bedienungshandhabe zu betätigen.In contrast to the telescopic vacuum cleaner suction pipe (US Pat. No. 3,044,437) described at the beginning, the latching body according to the invention forms a separate component that is independent of the hold-down device. The hold-down device is designed as a control body, which either offers a free or escape space for the latching body when the latching body is to disengage from the respective latching recess or which holds the latching body in a certain latching recess in the event of locking. The latching body according to the invention is therefore independent in its movement when the hold-down device is unlocked. In this way - in the sub switched to the subject of US-PS 32 44 437 - with the invention created the basic possibility to operate the telescopic vacuum cleaner suction pipe connection at least in one direction (preferably in the sense of a pipe extension) without constant manipulation of an operating handle.

Weitere Vorteile der Erfindung ergeben sich aus zusätzlichen Unteransprüchen.Additional advantages of the invention result from additional subclaims.

In den Zeichnungen sind bevorzugte Ausführungs­beispiele der Erfindung näher dargestellt, es zeigen:

  • Fig. 1 eine teilweise geschnittene Längsan­sicht der ersten Ausführungsform eines telesko­pierbaren StaubsaugerSaugrohres in der Verriege­lungsstellung,
  • Fig. 2 das Staubsauger-Saugrohr gemäß Fig. 1 in der entriegelten Stellung,
  • Fig. 3 und 4 zwei weitere Ausführungsformen teleskopierbarer Staubsauger-Saugrohre in der Dar­stellungsweise gemäß den Fig. 1 und 2 und
  • Fig. 5 einen Querschnitt entsprechend der mit V-V bezeichneten Schnittlinie in Fig. 4.
Preferred exemplary embodiments of the invention are shown in more detail in the drawings, in which:
  • 1 is a partially sectioned longitudinal view of the first embodiment of a telescopic vacuum cleaner suction tube in the locked position,
  • 2 the vacuum cleaner suction pipe according to FIG. 1 in the unlocked position,
  • 3 and 4, two further embodiments of telescopic vacuum cleaner suction pipes in the representation according to FIGS. 1 and 2 and
  • 5 shows a cross section corresponding to the section line labeled VV in FIG. 4.

In den Zeichnungen ist ein teleskopierbares Staubsauger-Saugrohr insgesamt mit der Bezugszif­fer 10 bezeichnet. Das Saugrohr weist ein Innen­ rohr 11 und ein Außenrohr 12 auf. Das Außenrohr 12 bildet eine muffenartige Aufweitung 13. Inner­halb des zwischen Innenrohr-Außenmantelfläche 34 und Außenrohrinnenmantelfläche 33 befindlichen insgesamt mit 14 bezeichneten Freiraums ist ein im Querschnitt im wesentlichen kreisringförmiger Führungskörper 15 aus Kunststoff angeordnet. Im Führungskörper 15 aufgenommen ist jeweils ein ent­lang der Rohrlängsachse x translatorisch beweg­licher Schieber 16 (Fig. 1 und 2,) 16a, (Fig. 3) sowie ein rotatorisch um die Rohrlängsachse x entlang der Umfangsrichtung u beweglicher Schie­ber 16b (Fig. 4 und 5).In the drawings, a telescopic vacuum cleaner suction tube is generally designated by the reference number 10. The suction pipe has an inside tube 11 and an outer tube 12. The outer tube 12 forms a sleeve-like widening 13. Inside the overall space designated by 14 between the inner tube outer jacket surface 34 and the outer tube inner jacket surface 33, a guide body 15 made of plastic with an essentially circular cross section is arranged. Received in the guide body 15 is in each case a slide 16 (FIGS. 1 and 2,) 16a, (FIG. 3) which is translationally movable along the pipe longitudinal axis x (FIG. 3) and a slide 16b which is rotatable about the pipe longitudinal axis x along the circumferential direction u (FIGS. 4 and 5 ).

Jeder Schieber 16, 16a, 16b durchgreift die Außenrohrwandung 13 mit einem Betätigungsansatz 17 innerhalb einer Aussparung 18. Jeder Betäti­gungsansatz 17 wiederum trägt eine Handhabe 19.Each slide 16, 16a, 16b passes through the outer tube wall 13 with an actuating shoulder 17 within a recess 18. Each actuating shoulder 17 in turn carries a handle 19.

Jedes Innenrohr 11 weist eine Rastleiste 20 mit Rastausnehmungen 21 auf.Each inner tube 11 has a locking bar 20 with locking recesses 21.

Bei den dargestellten Ausführungsformen be stehen das Innenrohr 11 und Außenrohr 12 aus Stahlblech. Die Rastleiste 20 mit den Rastausneh­mungen 21 ist als relativ schmaler leistenartiger Streifen in die Innenrohrwandung 22 eingeprägt. Die Einprägung ist hierbei derart, daß jede Rast­ausnehmung 21 von der jeweils benachbarten Rast­ausnehmung 21 über einen unverformten kreiszylin­drischen Rohrwandbereich 23 distanziert ist.In the illustrated embodiments, the inner tube 11 and outer tube 12 are made of sheet steel. The locking bar 20 with the locking recesses 21 is stamped into the inner tube wall 22 as a relatively narrow strip-like strip. The embossing is in this case such that each latching recess 21 is distanced from the respectively adjacent latching recess 21 via an undeformed circular cylindrical tube wall region 23.

Jede Rastausnehmung 21 weist an einer axialen Endseite eine sich spitzwinklig geneigt zur Rohr­ längsachse x erstrekkende Gleitflanke 24 für einen walzenartigen Rastkörper 25 (Fig. 1 und 2), für einen stegartigen Rastkörper 25a (Fig. 3) bzw. für einen Kugel-Rastkörper 25b (Fig. 4 und 5) auf.Each latching recess 21 has an acute-angled angle to the tube on one axial end side Longitudinal axis x extending sliding flank 24 for a roller-like locking body 25 (FIGS. 1 and 2), for a web-like locking body 25a (FIG. 3) or for a ball locking body 25b (FIGS. 4 and 5).

An der anderen axialen Endseite einer jeden Rastausnehmung 21 ist mit einem relativ kleinen Krümmungsradius eine Sperr- bzw. Hemmflanke 26 ausgebildet. Und zwar weist eine jede Rastausneh­mung 21 an ihrer zum Saugvorsatz (der Saugvorsatz ist nicht dargestellt, aber mit S und einem Pfeil angedeutet) wie zum Beispiel Saugbürste oder Saug­düse, weisenden axialen Endseite die gekrümmte Sperr- bzw. Hemmflanke 26 auf.On the other axial end side of each locking recess 21, a locking or inhibiting flank 26 is formed with a relatively small radius of curvature. Specifically, each latching recess 21 on its axial end side facing the suction attachment (the suction attachment is not shown, but indicated with an S and an arrow), such as a suction brush or suction nozzle, has the curved locking or inhibiting flank 26.

Die jeweiligen Längsachsen der für längliche Rastkörper 25, 25a bestimmten Rastausnehmungen 21 (Fig. 1-3) erstrecken sich sekantial zum Körper des Innenrohrs 11, dessen Querschnitt kreiszylin­drisch ist.The respective longitudinal axes of the latching recesses 21 (FIGS. 1-3) intended for elongated latching bodies 25, 25a extend secantially to the body of the inner tube 11, the cross section of which is circular-cylindrical.

Die Rastausnehmungen 21 entsprechend den Fig. 4 und 5 sind, jedenfalls im Querschnitt gemäß Fig. 5, im wesentlichen kugelkalottenförmig ausgebildet, während der zugehörige Rastkörper 25b selbst - wie bereits vorerwähnt - Kugelge­stalt aufweist.The latching recesses 21 corresponding to FIGS. 4 and 5 are, at least in cross section according to FIG. 5, essentially spherical in shape, while the associated latching body 25b itself - as already mentioned - has a spherical shape.

Allen dargestellten Ausführungsformen entspre­chend den Fig. 1-5 ist als wesentliches Merkmal gemeinsam, daß Schieber (bzw. Niederhalter) 16, 16a, 16b und zugehörige Rastkörper 25, 25a, 25b gesonderte Bauteile bilden. Während des Sperrzu­standes (Fig. 1 sowie Fig. 3-5) hält der jewei­lige Schieber 16, 16a, 16b den jeweiligen Rastkör­per 25, 25a, 25b zwangsweise innerhalb einer aus­gewählten Rastausnehmung 21, so daß Innenrohr 11 und Außenrohr 12 unverschieblich zueinander gehal­ten sind.All of the illustrated embodiments corresponding to FIGS. 1-5 have in common as an essential feature that slide (or hold-down device) 16, 16a, 16b and associated latching bodies 25, 25a, 25b form separate components. During the locked state (FIGS. 1 and 3-5), the respective slide 16, 16a, 16b forcibly holds the respective latching body 25, 25a, 25b within a selected latching recess 21, so that the inner tube 11 and outer tube 12 are held immovably relative to one another.

Falls jedoch der Schieber 16, 16a, 16b in Richtung o verschoben wird, öffnet der Schieber 16, 16a, 16b die Verbindung zum Freiraum 14, so daß der Rastkörper 25, 25a, 25b in der Lage ist, aus der Rastausnehmung 21 herauszugleiten (d.h., die beiden Teleskoprohre 11, 12 zu entkupplen), sobald eine Relativbewegung der beiden Teleskop­rohre 11, 12 zueinander eingeleitet wird. In je­dem Falle weist der Rastkörper 25, 25a, 25b eine relativ geringe Masse auf, so daß eine leicht­gängiger Rastvorgang, also auch eine leicht­gängige Verschieblichkeit der beiden Rohre 11, 12 zueinander, gewährleistet ist.However, if the slider 16, 16a, 16b is moved in the direction o, the slider 16, 16a, 16b opens the connection to the free space 14, so that the latching body 25, 25a, 25b is able to slide out of the latching recess 21 (ie to decouple the two telescopic tubes 11, 12) as soon as a relative movement of the two telescopic tubes 11, 12 to one another is initiated. In any case, the latching body 25, 25a, 25b has a relatively small mass, so that a smooth-running latching process, that is to say an easy-to-move displaceability of the two tubes 11, 12, is ensured.

Die Funktion der einzelnen Ausführungsformen ist folgende:The function of the individual embodiments is as follows:

Wie aus Fig. 1 ersichtlich, befindet sich der walzenförmige Rastkörper 25 in einer Rastausneh­mung 21 und wird dort mittels einer Sperrnase 27 des Schiebers 16 niedergehalten.As can be seen from FIG. 1, the roller-shaped latching body 25 is located in a latching recess 21 and is held down there by means of a locking lug 27 of the slide 16.

Sobald der Schieber 16 entgegen der Rückstell­kraft einer lediglich gestrichelt eingezeichneten Schraubendruckfeder 28 betätigt wird, ergibt sich der Betriebszustand gemäß Fig. 2: Die Sperrnase 27 ist zurückgezogen, das Innenrohr 11 kann in Zugrichtung z nach links vom Außenrohr 12 wegge­zogen werden, wobei der walzenförmige Rastkörper 25 über jede Gleitflanke 24 völlig ungehindert hinweggleiten kann. Auch ein Ineinanderschieben der Rohrverbindung 10 in Druckrichtung d ist im dargestellten Zustand gemäß Fig. 2 möglich, da die Sperr- bzw. Hemmflanken 26 so ausgebildet sind, daß sie gerade noch ein Herausgleiten des jeweiligen Rastkörpers 25, 25a, 25b während der Verstellbewegung gestatten. Die Sperr- bzw. Hemm­flanken 26 dienen einerseits einer während der Verstellbewegung fühl- bzw. hörbaren Rastmarkie­rung und bieten andererseits eine zusätzliche Sicherung der Sperrstellung (Fig. 1, Fig. 3 bis 5) auch für den Fall, daß die Druckkraft in Rich­tung d (starkes Anstoßen des Saugvorsatzes S ge­gen ein Hindernis während der Saugarbeit) relativ groß sein sollte. Auch ist es beim Ausführungsbei­spiel gemäß Fig. 1 so, daß bei Auftreten einer relativ großen Kraft in Richtung d eine anfäng­liche Abrollbewegung des Walzenkörpers 25 eine Bewegung der Sperrnase 27 in Richtung z bzw. g, also eine zusätzliche Sicherung der Sperrstel­lung, bewirkt. Insoweit hat hier der Walzenkörper 25 etwa die Funktion eines sich zwischen zwei Zahnstangen abwälzenden Ritzels.As soon as the slide 16 is actuated against the restoring force of a helical compression spring 28, which is only shown in broken lines, the result is 2: The locking lug 27 is retracted, the inner tube 11 can be pulled away from the outer tube 12 in the pulling direction z to the left, the roller-shaped latching body 25 being able to slide freely over each sliding flank 24. Pushing the pipe connection 10 into one another in the pressure direction d is also possible in the state shown in FIG. 2, since the locking or inhibiting flanks 26 are designed such that they just allow the respective latching body 25, 25a, 25b to slide out during the adjustment movement. The locking or inhibiting flanks 26 serve, on the one hand, for a latching mark that can be felt or heard during the adjustment movement and, on the other hand, offer additional securing of the locking position (FIGS. 1, 3 to 5) also in the event that the pressure force in the direction d ( strong impact of the suction attachment S against an obstacle during suction work) should be relatively large. It is also the case in the embodiment according to FIG. 1 that when a relatively large force occurs in the direction d, an initial rolling movement of the roller body 25 causes a movement of the locking lug 27 in the direction z or g, that is to say an additional securing of the locking position. To this extent, the roller body 25 has approximately the function of a pinion rolling between two racks.

Sobald sich der walzenförmige Rastkörper 25 gemäß Fig. 2 wieder im Tiefsten einer bestimmten Rastausnehmung 21 befindet, bewegt sich der Schie­ ber 16 nach Bestätigungsentlastung unter der Wir­kung der Schraubendruckfeder 28 in Schließrich­tung g. Es ist noch wichtig zu erwähnen, daß eine Mitnahme bzw. Positionierung eines jeden Rastkör­pers 25, 25a, 25b etwa nach Art eines Kugelkäfigs mittels einer schieberseitigen Öffnung 29 erfolgt.As soon as the roller-shaped latching body 25 according to FIG. 2 is again in the deepest of a certain latching recess 21, the shooting moves About 16 after confirmation confirmation under the action of the helical compression spring 28 in the closing direction g. It is also important to mention that each latching body 25, 25a, 25b is carried along or positioned approximately in the manner of a ball cage by means of an opening 29 on the slide side.

Beim Ausführungsbeispiel gemäß Fig. 3 ist die Funktion ähnlich wie beim Ausführungsbeispiel ge­mäß den Fig. 1 und 2. Beim Ausführungsbeispiel gemäß Fig. 3 ist der stegartige Rastkörper 25a Bestandteil eines insgesamt mit 30 bezeichneten Rechtecksbügels bzw. -rahmens aus Draht. Der dem Verriegelungssteg 25a abgewandte Quersteg 31 des Bügels 30 ist innerhalb eines schieberseitigen Langloches 32 aufgenommen. Es ist vorstellbar, daß das Langloch 32 eine Verschiebung des Schie­bers 16a in Richtung o gestattet, so daß die Sperrnase 27 den Zugang des Rastkörpers 25a zum Freiraum 14 herstellen kann, um den Verriege­lungszustand, wie er in Fig. 3 dargestellt ist, aufzulösen.In the exemplary embodiment according to FIG. 3, the function is similar to that in the exemplary embodiment according to FIGS. 1 and 2. In the exemplary embodiment according to FIG. 3, the web-like latching body 25a is part of a rectangular bracket or frame made of wire, designated overall by 30. The transverse web 31 of the bracket 30 facing away from the locking web 25a is accommodated within an elongated hole 32 on the slide side. It is conceivable that the elongated hole 32 allows the slide 16a to be displaced in the direction o, so that the locking lug 27 can establish the access of the latching body 25a to the free space 14 in order to release the locking state, as shown in FIG. 3.

Die Funktion der Ausführungsform gemäß den Fig. 4 und 5 ist grundsätzlich vergleichbar mit den Ausführungsformen gemäß den Fig. 1 bis 3, mit dem Unterschied, daß die Betätigung des Schiebers 16b nicht translatorisch in Richtung der Rohr­längsache x, sondern vielmehr rotatorisch um die Rohrlängsachse x herum entsprechend den in Fig. 5 eingetragenen Pfeilen o in Öffnungsrichtung und g in Schließrichtung erfolgt. Auch bei diesem Aus­ führungsbeispiel (Fig. 5) ist eine Sperrnase 27 zu erkennen.The function of the embodiment according to FIGS. 4 and 5 is fundamentally comparable to the embodiments according to FIGS. 1 to 3, with the difference that the actuation of the slide 16b is not translatory in the direction of the longitudinal pipe thing x, but rather rotatory about the longitudinal pipe axis x around in accordance with the arrows in Fig. 5 o in the opening direction and g in the closing direction. Even with this out management example (Fig. 5), a locking lug 27 can be seen.

Im übrigen ist doch denkbar, daß die Anordnung 16, 16a, 16b, 25, 25a, 25b durch eine an sich bekannte Kugelrast ersetzbar wäre. Hierbei könnte die Handhabe 19 beibehalten werden oder sogar entfallen. Im letzteren Falle, müßte die Stärke der Rastkraft durch die Rückstellkraft einer nicht eingezeichneten Kugelrast-Feder, welche in diesem Falle den Niederhalter darstellen würde, variiert werden. Eine ähnliche Ausführungsform wäre auch im Zusammenhang mit Fig. 3 denkbar. Dort könnte der Bügel 30 mit seinen beiden Längs­schenkeln innerhalb des Freiraums 14 zwischen Außenrohr-Innenmantelfläche 33 und Innenrohr-­Außenmantelfläche 34 innerhalb des Führungskör­pers 15 translatorisch geführt und entgegen der Rückstellkraft einer oder zweier nicht dargestell­ter Federn (Niederhalter) aus den Rastausnehmun­gen 21 ausrastbar sein. Bei dieser nicht darge­stellten Ausführungsform würden der Rastkörper 25a und die korrelierenden Rastausnehmungen 21 nicht - wie in Fig. 3 eingetragen - oben sondern vielmehr diametral gegenüberliegend an der un­teren Seite des Innenrohres 11 angeordnet sein. Die sickenartige Axialnut 35 wäre sodann - nicht wie in Fig. 3 dargestellt - unten, sondern viel­mehr diametral gegenüberliegend oben vorgesehen.Otherwise, it is conceivable that the arrangement 16, 16a, 16b, 25, 25a, 25b could be replaced by a ball catch known per se. Here, the handle 19 could be retained or even omitted. In the latter case, the strength of the detent force would have to be varied by the restoring force of a ball detent spring, not shown, which would represent the hold-down device in this case. A similar embodiment would also be conceivable in connection with FIG. 3. There, the bracket 30 could be guided with its two longitudinal legs within the free space 14 between the outer tube inner jacket surface 33 and the inner tube outer jacket surface 34 within the guide body 15 and against the restoring force of one or two springs (hold-down device), not shown, can be disengaged from the latching recesses 21. In this embodiment, which is not shown, the latching body 25a and the correlating latching recesses 21 would not be arranged on the lower side of the inner tube 11, as shown in FIG. The bead-like axial groove 35 would then - not as shown in Fig. 3 - provided below, but rather diametrically opposite at the top.

Eine Verdrehsicherung zwischen Innenrohr 11 und Außenrohr 12 kommt wie folgt zustande: Der am Außenrohr 12 innerhalb der Aufweitung 13 in nicht näher dargestellter Weise (beispielsweise durch Klebung) drehgesicherte Führungskörper 15 greift (vgl. Fig. 5) mit einer Axialfeder 36 in die innenrohrseitig vorgesehene axiale Längssicke 35 ein. Zugleich wird hier ein Fehlluft erzeugender Luftabschluß erreicht. Die Anordnung ist hierbei im übrigen so getroffen, daß der vordere äußere Bereich des Führungskörpers 15 einen unverformten Rohrbereich 23 übergreift, wenn sich die Rastkör­per 25, 25a, 25b in einer Rastausnehmung 21 be­finden.An anti-rotation device between the inner tube 11 and outer tube 12 comes about as follows: The on Outer tube 12 within the widening 13 in a manner not shown in more detail (for example by gluing), rotationally secured guide body 15 engages (see FIG. 5) with an axial spring 36 in the axial longitudinal bead 35 provided on the inner tube side. At the same time, an air seal generating incorrect air is achieved here. The arrangement is otherwise such that the front outer region of the guide body 15 engages over an undeformed tube region 23 when the latching bodies 25, 25a, 25b are located in a latching recess 21.

Die Erfindung sieht alternativ auch vor, Axial­nut 35 und Rastausnehmungen 21 zu überlagern. So könnten die kugelförmigen Rastausnehmungen 21 ge­mäß Fig. 4 und 5 im Tiefsten einer um 180° umfangsversetzten Axialnut 35 (auch die Feder 36 wäre dann versetzt) eingeprägt sein.Alternatively, the invention also provides for axial groove 35 and latching recesses 21 to be superimposed. The spherical locking recesses 21 according to FIGS. 4 and 5 could be embossed in the deepest of an axial groove 35 offset circumferentially by 180 ° (the spring 36 would then also be offset).

Claims (20)

1. Teleskopierbares Staubsauger-Saugrohr mit einem Außenrohr, mit einem eine sich axial er­streckende Rastleiste tragenden Innenrohr, mit einem mit den Rastausnehmungen der Rastleiste zu­sammenwirkenden, Außen- und Innenrohr axial lös­bar zueinander arretierenden, etwa radial beweg­lich am Außenrohr gehaltenen, durch einen Nieder­halter arretierbaren Rastkörper und mit einer sich axial erstreckenden Formschlußsicherung zwi­schen Außen- und Innenrohr zur Verhinderung einer Relativdrehung, dadurch gekennzeichnet, daß die Rastleiste (20) mit ihren Rastausnehmungen (21) ein Verformungsbereich in der Wandung (22) des Innenrohres (11) ist, daß die eine Relativdrehung zwischen Innen- und Außenrohr (11, 12) ver­hindernde Formschlußsicherung eine außen- und/­oder innenrohrseitig in die jeweilige Rohrwandung eingeformte Axialnut (35) bzw. Axialfeder auf­weist und daß der Rastkörper (25; 25a; 25b) ein gesondertes Bauteil bildet, welches mittels des einen Steuerkörper darstellenden, unabhängig vom Rastkörper (25; 25a; 25b) beweglichen Niederhal­ters (16; 16a; 16b) bezüglich der jeweiligen Rast­ausnehmung (21) in eine Sperr- oder Freigabestel­lung versetzbar ist.1.Telescopic vacuum cleaner suction tube with an outer tube, with an inner tube carrying an axially extending locking bar, with an outer and inner tube interacting with the locking recesses of the locking bar, axially releasably locking to one another, held approximately radially movably on the outer tube, locking body which can be locked by a hold-down device and with an axially extending positive locking between the outer and inner tube to prevent relative rotation, characterized in that the locking bar (20) with its locking recesses (21) is a deformation area in the wall (22) of the inner tube (11) that the one Relative rotation between the inner and outer tube (11, 12) preventing positive locking has an outer and / or inner tube side formed in the respective tube wall axial groove (35) or axial spring and that the locking body (25; 25a; 25b) forms a separate component, which by means of a control body, regardless of the locking body per (25; 25a; 25b) movable hold-down device (16; 16a; 16b) can be moved into a locking or release position with respect to the respective latching recess (21). 2. Staubsauger-Saugrohr nach Anspruch 1, dadurch gekenn- zeichnet, daß die Rastausnehmung (21) von der unmittelbar benachbarten Rastausneh­ mung (21) über einen unverformten Innenrohr-Wand­bereich (23) distanziert ist.2. Vacuum cleaner suction pipe according to claim 1, characterized in that the locking recess (21) from the immediately adjacent locking recess tion (21) over a non-deformed inner tube wall area (23). 3. Staubsauger-Saugrohr nach Anspruch 1 oder nach Ansspruch 2, dadurch gekennzeichnet, daß die Rastausnehmung (21) an mindestens einer axialen Endseite eine sich spitzwinklig geneigt zur Rohr­längsachse (x) erstreckende Gleitflanke (24) für den Rastkörper (25; 25a; 25b) bildet.3. Vacuum cleaner suction pipe according to claim 1 or claim 2, characterized in that the latching recess (21) on at least one axial end side an obliquely inclined to the tube longitudinal axis (x) extending sliding flank (24) for the latching body (25; 25a; 25b ) forms. 4. Staubsauger-Saugrohr nach einem der An­sprüche 1 bis 3, dadurch gekennzeichnet, daß die Rastausnehmung (21) an ihren beiden axialen End­seiten je eine sich spitzwinklig geneigt zur Rohr­längsachse (x) erstreckende Gleitflanke (24) für den Rastkörper (25; 25a; 25b) bildet.4. Vacuum cleaner suction pipe according to one of claims 1 to 3, characterized in that the latching recess (21) on its two axial end sides each an acute-angled to the tube longitudinal axis (x) extending sliding flank (24) for the latching body (25; 25a; 25b) forms. 5. Staubsauger-Saugrohr nach einem der Ansprü­che 1 bis 4, dadurch gekennzeichnet, daß die Rastausnehmung (21) an der einen axialen Endseite eine sich spitzwinklig geneigt zur Rohrlängsachse (x) erstreckende Gleitflanke (24) und an der an­deren axialen Endseite eine nach einem relativ kleinen Radius gekrümmte Sperr- bzw. Hemmflanke (26) bildet.5. Vacuum cleaner suction pipe according to one of claims 1 to 4, characterized in that the latching recess (21) on one axial end side an inclined at an acute angle to the tube longitudinal axis (x) extending sliding flank (24) and on the other axial end side one after one relatively small radius forms curved locking or inhibiting flank (26). 6. Staubsauger-Saugrohr nach Anspruch 5, dadurch gekenn- zeichnet, daß die Rastausnehmung (21) an ihrer zum Saugvorsatz (bei S), wie z.B. Saugbürste oder Saugdüse, weisenden axialen End­seite die gekrümmte Sperr- bzw. Hemmflanke (26) aufweist.6. Vacuum cleaner suction pipe according to claim 5, characterized in that the latching recess (21) on its towards the suction attachment (at S), such as suction brush or suction nozzle, facing the axial end side has the curved locking or inhibiting flank (26). 7. Satubsauger-Saugrohr nach einem der Ansprü­che 1 bis 6, dadurch gekennzeichnet, daß sich die Längsachsen der Rastflächen-Flanken (24; 26) se­kantial zum kreiszylindrischen Innenrohrkörper (11) erstrecken.7. vacuum cleaner suction pipe according to one of claims 1 to 6, characterized in that the longitudinal axes of the locking surface flanks (24; 26) extend secantially to the circular cylindrical inner tube body (11). 8. Staubsauger-Saugrohr nach einem der Ansprü­che 1 bis 7, dadurch gekennzeichnet, daß der Rastkörper ein zylindrischer (25; 25a) oder kugel­förmiger (25b) Körper ist.8. Vacuum cleaner suction pipe according to one of claims 1 to 7, characterized in that the latching body is a cylindrical (25; 25a) or spherical (25b) body. 9. Staubsauger-Saugrohr nach einem der Ansprü­che 1 bis 8, dadurch gekennzeichnet, daß der Rastkörper eine Kugel (25b) und die Rastausneh­mung (21) etwa kugelkalottenförmig ist.9. Vacuum cleaner suction pipe according to one of claims 1 to 8, characterized in that the latching body is a ball (25b) and the latching recess (21) is approximately spherical cap-shaped. 10. Staubsauger-Saugrohr nach Anspruch 8, dadurch gekennzeichnet, daß der Rastkörper ein walzenförmiger Körper (25) ist.10. Vacuum cleaner suction pipe according to claim 8, characterized in that the latching body is a roller-shaped body (25). 11. Staubsauger-Saugrohr nach einem der Ansprü­che 1 bis 10, dadurch gekennzeichnet, daß der Rastkörper einen sich sekantial zum kreiszylin­drischen Innenrohrkörper (11) erstreckenden Quer­steg (25a) eines mit seiner dem Quersteg (25a) abgewandten Seite (bei 31) mindestens mittelbar (bei 32) am Außenrohr (12) schwenkbar angelenkten oder verschieblich geführten C-förmigen bzw. rechteckförmigen Drahtbügels (30) bildet.11. Vacuum cleaner suction pipe according to one of claims 1 to 10, characterized in that the latching body has a secantial to the circular cylindrical inner tube body (11) extending crossbar (25a) with its side facing away from the crossbar (25a) (at 31) at least indirectly ( at 32) on the outer tube (12) pivotally articulated or displaceably guided C-shaped or rectangular wire bracket (30). 12. Staubsauger-Saugrohr nach einem der Ansprü­che 1 bis 11, dadurch gekennzeichnet, daß der Niederhalter ein in Rohrlängs (x)- oder in Rohr­umfangsrichtung (u) innerhalb eines Freiraums (14) zwischen Innenrohr-Außenmantelfläche (34) und Außenrohr-Innenmantelfläche (33)beweglicher Sperrschieber (16; 16a; 16b) ist, welcher in Sperrstellung den in der Rastausnehmung (21) be­findlichen Rastkörper (25; 25a; 25b) überlagert und welcher in Freigabestellung den Freiraum (14) zur Rastausnehmung (21) hin öffnet.12. Vacuum cleaner suction pipe according to one of claims 1 to 11, characterized in that the Hold-down device is a locking slide (16; 16a; 16b) which is movable in the tube length (x) - or in the tube circumferential direction (u) within a space (14) between the inner tube outer jacket surface (34) and the outer tube inner jacket surface (33) the locking recess (21) located locking body (25; 25a; 25b) is superimposed and which opens the free space (14) to the locking recess (21) in the release position. 13. Staubsauger-Saugrohr nach einem der An­sprüche 1 bis 11, dadurch gekennzeichnet, daß der Niederhalter bzw. der Sperrschieber (16; 16a; 16b) mittels Federkraft (28) in ihrer Sperrstel­lung gehalten ist oder daß der Niederhalter selbst aus einer in Sperrichtung wirkenden Feder besteht.13. Vacuum cleaner suction pipe according to one of claims 1 to 11, characterized in that the holding-down device or the locking slide (16; 16a; 16b) is held in its locking position by means of spring force (28) or that the holding-down device itself acts from a locking direction Spring exists. 14. Staubsauger-Saugrohr nach Anspruch 13, dadurch gekennzeichnet, daß Rastkörper und Nieder­halter eine federbelastete Kugelrast bilden.14. Vacuum cleaner suction pipe according to claim 13, characterized in that the locking body and hold-down form a spring-loaded ball catch. 15. Staubsauger-Saugrohr nach einem der Ansprü­che 10 bis 13, dadurch gekennzeichnet, daß der den Quersteg (25a) als Rastkörper aufweisende ver­schieblich geführte Bügel (30) von mindestens einer Feder als Niederhalter gegen die innenrohr­seitige Rastleiste 20 gezogen bzw. gedrückt wird.15. Vacuum cleaner suction pipe according to one of claims 10 to 13, characterized in that the crossbar (25a) having a latching body having displaceably guided bracket (30) is pulled or pressed by at least one spring as a hold-down device against the latching bar 20 on the inner tube side. 16. Staubsauger-Saugrohr nach einem der Ansprü­che 1 bis 15, dadurch gekennzeichnet, daß zur Führung des Sperrschiebers (16; 16a; 16b) inner­ halb des Freiraums (14) zwischen Innenrohr-Außen­mantelfäche (34) und Außenrohr-Innenmantelfläche (33) ein Führungskörper (15) vorgesehen ist.16. Vacuum cleaner suction pipe according to one of claims 1 to 15, characterized in that for guiding the locking slide (16; 16a; 16b) inside A guide body (15) is provided half of the free space (14) between the inner tube outer jacket surface (34) and the outer tube inner jacket surface (33). 17. Staubsauger-Saugrohr nach Anspruch 16, dadurch gekennzeichnet, daß der Führungskörper ein den Freiraum (14) zwischen Innenrohr-Außen­mantelfläche (34) und Außenrohr-Innenmantelfläche (33) abdichtender kreiszylindrischer Ringkörper (15) aus Kunststoff ist.17. Vacuum cleaner suction pipe according to claim 16, characterized in that the guide body is a free space (14) between the inner tube outer surface (34) and outer tube inner surface (33) sealing circular cylindrical ring body (15) made of plastic. 18. Staubsauger-Saugrohr nach einem der An­sprüche 1 bis 17, dadurch gekennzeichnet, daß der Sperrschieber (16; 16a; 16b) die Außenrohrwandung mit einem Betätigungsansatz (17) in einer Aus­sparung (18) durchgreift.18. Vacuum cleaner suction pipe according to one of claims 1 to 17, characterized in that the locking slide (16; 16a; 16b) passes through the outer tube wall with an actuating projection (17) in a recess (18). 19. Staubsauger-Saugrohr nach einem der An­sprüche 16 bis 18, dadurch gekennzeichnet, daß der am Außenrohr (12) drehgesicherte Führungskör­per (15) satt mit einer axialen Führungs- bzw. Dichtrippe (36) in eine innenrohrseitige axiale Längssicke (35) eingreift oder mit einer axialen Führungs- bzw. Dichtnut eine innenrohrseitige axiale Längsfeder satt übergreift.19. Vacuum cleaner suction pipe according to one of claims 16 to 18, characterized in that the on the outer tube (12) rotationally secured guide body (15) with an axial guide or sealing rib (36) engages in an inner tube-side axial bead (35) or with an axial guide or sealing groove, an axial longitudinal spring on the inner tube side fits tightly. 20. Staubsauger-Saugrohr nach einem der Ansprü­che 1 bis 19, dadurch gekennzeichnet, daß die Rastausnehmungen (21) die als eine Relativdrehung zwischen Innen- und Außenrohr (11, 12) verhin­dernde Formschlußsicherung vorgesehene innenrohr­seitige axiale Längssicke (35) quer durchsetzen oder als kugelkalottenförmige Rastausnehmungen im Tiefsten der Axialsicke (35) eingeprägt sind.20. Vacuum cleaner suction pipe according to one of claims 1 to 19, characterized in that the latching recesses (21) as a relative rotation between the inner and outer tube (11, 12) preventing positive locking provided inner tube-side axial longitudinal bead (35) pass transversely or as a spherical cap Locking recesses are stamped in the deepest of the axial bead (35).
EP87119407A 1987-06-03 1987-12-31 Telescopic vacuum cleaner suction hose Expired - Lifetime EP0293518B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87119407T ATE72743T1 (en) 1987-06-03 1987-12-31 TELESCOPIC VACUUM CLEANER SUCTION TUBE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3718578 1987-06-03
DE3718578A DE3718578C1 (en) 1987-06-03 1987-06-03 Telescopic suction tube for vacuum cleaner - has inner section forming arresting strip with deformed region with arresting recesses

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EP0293518A1 true EP0293518A1 (en) 1988-12-07
EP0293518B1 EP0293518B1 (en) 1992-02-26

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EP87119407A Expired - Lifetime EP0293518B1 (en) 1987-06-03 1987-12-31 Telescopic vacuum cleaner suction hose

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EP (1) EP0293518B1 (en)
AT (1) ATE72743T1 (en)
DE (1) DE3776902D1 (en)
ES (1) ES2030706T3 (en)
GR (1) GR3004236T3 (en)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0520534A1 (en) * 1991-06-28 1992-12-30 OMEC S.p.A. Telescopic extension for a vacuum cleaner
DE19524290C1 (en) * 1995-07-06 1996-08-14 Froh Roehren Telescopic suction tube for vacuum cleaner with outer and inner tube
FR2733407A1 (en) * 1995-04-27 1996-10-31 Zelmer TELESCOPIC SUCTION TUBE FOR A VACUUM
FR2755000A1 (en) * 1996-10-28 1998-04-30 Zelmer TELESCOPIC WALL OF VACUUM SUCTION
WO1999035409A1 (en) * 1998-01-07 1999-07-15 Tubalco Manufacturing Pty. Ltd. Locking arrangement for telescopically moving tubes
WO2000000075A1 (en) * 1998-06-30 2000-01-06 Daewoo Electronics Co., Ltd. Telescopable wand assembly of a vacuum cleaner
WO2001065992A1 (en) * 2000-03-07 2001-09-13 Eunsung Electronics Co., Ltd Automatic driving means of a suction extension pipe for a vacuum cleaner
US6435754B1 (en) 1999-10-11 2002-08-20 Omec S.P.A. Telescopic extension for an electric household appliance
US6612617B2 (en) 2000-09-30 2003-09-02 Weier Xu Telescopic dust-collecting pipe for vacuum cleaner
US6634674B1 (en) 2000-01-12 2003-10-21 Weier Xu Telescopic dust-collecting pipe for vacuum cleaner
WO2007030979A1 (en) * 2005-09-16 2007-03-22 Yonglong Wu Telescoping dust pipe used in suction cleaner
DE102006006189B3 (en) * 2006-02-09 2007-06-06 Wolfgang Hermes Fodder and water device for domestic animals e.g. for dogs, has operating handle guided at adjuster, which acts upon a form-fit or clamping body, which are locked on stand-pole or detached from stand-pole
CN100367902C (en) * 2005-10-24 2008-02-13 徐为尔 Telescopic sucking tube of vacuum cleaner
CN1781438B (en) * 2004-11-22 2011-08-10 胡佛有限公司 Telescopic wand for vacuum cleaner
EP2769659A3 (en) * 2013-02-26 2017-11-15 Fischer Rohrtechnik GmbH Vacuum cleaner suction tube with locking area

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11137006B2 (en) 2016-08-17 2021-10-05 D & M Designs Llc Collapsible telescoping pole

Citations (6)

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Publication number Priority date Publication date Assignee Title
FR1263595A (en) * 1959-07-20 1961-06-09 Electrische App N En Metaalfab Coupling fitting
US3244437A (en) * 1964-01-28 1966-04-05 Electrolux Corp Adjustable length vacuum cleaner wand
DE2618065A1 (en) * 1976-04-24 1977-10-27 Froh Roehren Telescopic suction tubes for vacuum cleaner - are locked by coaxial friction ring wedges to prevent tubes being pulled out
DE3102898A1 (en) * 1981-01-29 1982-08-26 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Clamping device on two telescopic suction pipes
EP0123428A1 (en) * 1983-03-25 1984-10-31 Electrolux Corporation Vacuum cleaner wand
US4577837A (en) * 1984-07-30 1986-03-25 Marvin Berg Locking mechanism for extendible telescoping tubular members

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3351363A (en) * 1964-12-23 1967-11-07 Electrolux Corp Adjustable length wand
US3351359A (en) * 1964-12-23 1967-11-07 Electrolux Corp Adjustable length wand

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1263595A (en) * 1959-07-20 1961-06-09 Electrische App N En Metaalfab Coupling fitting
US3244437A (en) * 1964-01-28 1966-04-05 Electrolux Corp Adjustable length vacuum cleaner wand
DE2618065A1 (en) * 1976-04-24 1977-10-27 Froh Roehren Telescopic suction tubes for vacuum cleaner - are locked by coaxial friction ring wedges to prevent tubes being pulled out
DE3102898A1 (en) * 1981-01-29 1982-08-26 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Clamping device on two telescopic suction pipes
EP0123428A1 (en) * 1983-03-25 1984-10-31 Electrolux Corporation Vacuum cleaner wand
US4577837A (en) * 1984-07-30 1986-03-25 Marvin Berg Locking mechanism for extendible telescoping tubular members

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0520534A1 (en) * 1991-06-28 1992-12-30 OMEC S.p.A. Telescopic extension for a vacuum cleaner
EP0601620A2 (en) * 1991-06-28 1994-06-15 OMEC S.p.A. "Telescopic extension for a vacuum cleaner"
US5332266A (en) * 1991-06-28 1994-07-26 Omec S.P.A. Telescopic extension for a vacuum cleaner
EP0601620A3 (en) * 1991-06-28 1995-05-17 Omec Spa "Telescopic extension for a vacuum cleaner".
TR28876A (en) * 1991-06-28 1997-07-17 Omec Spa A warm fit for a vacuum cleaner.
FR2733407A1 (en) * 1995-04-27 1996-10-31 Zelmer TELESCOPIC SUCTION TUBE FOR A VACUUM
DE19615814A1 (en) * 1995-04-27 1996-10-31 Zelmer Telescopic vacuum cleaner pipe
DE19615814C2 (en) * 1995-04-27 1998-01-29 Zelmer Telescopic vacuum cleaner pipe
DE19524290C1 (en) * 1995-07-06 1996-08-14 Froh Roehren Telescopic suction tube for vacuum cleaner with outer and inner tube
DE19720003C2 (en) * 1996-10-28 2003-05-28 Zelmer Rzeszow Telescopic suction pipe, in particular for a vacuum cleaner
FR2755000A1 (en) * 1996-10-28 1998-04-30 Zelmer TELESCOPIC WALL OF VACUUM SUCTION
WO1999035409A1 (en) * 1998-01-07 1999-07-15 Tubalco Manufacturing Pty. Ltd. Locking arrangement for telescopically moving tubes
WO2000000075A1 (en) * 1998-06-30 2000-01-06 Daewoo Electronics Co., Ltd. Telescopable wand assembly of a vacuum cleaner
US6237962B1 (en) 1998-06-30 2001-05-29 Daewoo Electronics Co., Ltd. Telescopable wand assembly of a vacuum cleaner
US6435754B1 (en) 1999-10-11 2002-08-20 Omec S.P.A. Telescopic extension for an electric household appliance
US6634674B1 (en) 2000-01-12 2003-10-21 Weier Xu Telescopic dust-collecting pipe for vacuum cleaner
WO2001065992A1 (en) * 2000-03-07 2001-09-13 Eunsung Electronics Co., Ltd Automatic driving means of a suction extension pipe for a vacuum cleaner
US6612617B2 (en) 2000-09-30 2003-09-02 Weier Xu Telescopic dust-collecting pipe for vacuum cleaner
CN1781438B (en) * 2004-11-22 2011-08-10 胡佛有限公司 Telescopic wand for vacuum cleaner
WO2007030979A1 (en) * 2005-09-16 2007-03-22 Yonglong Wu Telescoping dust pipe used in suction cleaner
CN100367902C (en) * 2005-10-24 2008-02-13 徐为尔 Telescopic sucking tube of vacuum cleaner
DE102006006189B3 (en) * 2006-02-09 2007-06-06 Wolfgang Hermes Fodder and water device for domestic animals e.g. for dogs, has operating handle guided at adjuster, which acts upon a form-fit or clamping body, which are locked on stand-pole or detached from stand-pole
EP2769659A3 (en) * 2013-02-26 2017-11-15 Fischer Rohrtechnik GmbH Vacuum cleaner suction tube with locking area

Also Published As

Publication number Publication date
DE3776902D1 (en) 1992-04-02
EP0293518B1 (en) 1992-02-26
GR3004236T3 (en) 1993-03-31
ES2030706T3 (en) 1992-11-16
ATE72743T1 (en) 1992-03-15

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