EP0552481B1 - Telescopic vacuum cleaner suction hose - Google Patents

Telescopic vacuum cleaner suction hose Download PDF

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Publication number
EP0552481B1
EP0552481B1 EP92121753A EP92121753A EP0552481B1 EP 0552481 B1 EP0552481 B1 EP 0552481B1 EP 92121753 A EP92121753 A EP 92121753A EP 92121753 A EP92121753 A EP 92121753A EP 0552481 B1 EP0552481 B1 EP 0552481B1
Authority
EP
European Patent Office
Prior art keywords
spring
locking
actuating attachment
restoring force
guide element
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
Application number
EP92121753A
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German (de)
French (fr)
Other versions
EP0552481A1 (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 & CO
Original Assignee
Carl Froh Rohrenwerk & Co GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Carl Froh Rohrenwerk & Co GmbH filed Critical Carl Froh Rohrenwerk & Co GmbH
Publication of EP0552481A1 publication Critical patent/EP0552481A1/en
Application granted granted Critical
Publication of EP0552481B1 publication Critical patent/EP0552481B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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 pipe according to the preamble of claim 1.
  • Such a vacuum cleaner suction tube is already known from US-A-3 351 363.
  • the locking of the inner and outer tube can be released by finger pressure on a slide that is longitudinally displaceable on the outer tube and spring-loaded in both axial directions, in which the slide is moved from the unloaded rest position - which also corresponds to the locking position - into one of the two axial directions by finger pressure. After releasing the slide from finger pressure, it slides back into its original locking position by spring force.
  • Such telescopic vacuum cleaner suction pipes are used by very different users - they can have a small or large body length, be young or old or right-handed or left-handed, etc. - such a locking or actuating device must be as simple and easy to use as possible for everyone his.
  • the known vacuum cleaner suction tube it is possible to achieve an unlocking position by moving the handle by means of finger pressure in both longitudinal directions of the tube, so that the telescopic tubes can be pulled apart.
  • the known vacuum cleaner suction pipe has the locking position in the rest position of the spring, so that after the handle is released the same moves immediately from both unlocking positions - and without the user doing anything - into the locking position.
  • This makes it technically unskillful or untalented users to be able to reach the unlocking position almost instantly, since the movement of the handle in either of the two possible longitudinal directions of the tubes achieves the desired success - that is, the unlocking of the tubes.
  • the tubes are automatically locked together when the handle is released, so that this type of locking and actuating device can rightly be described as completely "foolproof".
  • the invention has for its object to provide a telescopic vacuum cleaner suction tube, which allows a simplified design of greater reliability.
  • the invention solves this problem according to the features of the characterizing part of claim 1.
  • a telescopic vacuum cleaner suction tube is generally designated by the reference number 10.
  • the suction pipe 10 has an inner pipe 11 and an outer pipe 12.
  • the outer tube 12 is provided at its illustrated end with a sleeve-like widening 13.
  • a plastic guide body 15 is arranged which is essentially circular in cross section.
  • a slide 16 which is movable along the longitudinal axis x of the tube, is held in the guide body 15 there is an actuating projection 17 and a handle 19.
  • the handle 19 is positively and non-positively connected to the actuating projection 17, which extends through a recess 18 through the outer tube 12.
  • a locking surface 23 is arranged in the center on the side of the actuating projection 17 facing the outer tube 12. This locking surface 23 can close an opening 24 in the guide body 15, a roller body 26 being held in the opening 24 and in a recess 25 arranged below it in the inner tube 11. On both sides of the locking surface 23 of the actuating projection 17 there is a cavity 27, which has a trapezoidal shape and, in the case of unlocking, offers space for the rolling element 26.
  • the slide 19 and thus, of course, the actuating projection 17 is moved in one of the directions of the double arrow, so that there is a cavity 27 above the opening 24 in the guide body 15 and thus also above the roller body 26, the same inner and outer tube 11th , 12 pulling force cause the rolling element 26 to be pressed out of the locking recess 25 into a cavity 17, so that the locking between the inner and outer tubes 11, 12 is released.
  • the slide 19 slides back into the rest position due to the spring restoring force of the bar spring 32, and if a differential force acts on the inner and outer tubes 11, 12 at the same time, the rolling element 26 is moved into the closest latching recess 25 and thus into a new locking position .
  • the annular rod spring 32 held at both ends in the guide body 15 forcibly returns the actuating projection 17 to the locking position when no more force is applied to the handle 19.
  • the spring rest position of the spring rod 32 would then have to match the locking position.
  • the annular bar spring 32 is at least partially held in a groove 33 on the circumferential surface 20 of the half of the guide body 15, not shown, up to approximately the mold-dividing plane (guide bar 34), a section 35 of the bar spring 32 simultaneously engaging in a groove 36 of the actuating projection 17 . Since the bar spring 32 is unguided above the mold division plane between the groove 33 and the groove 36, the bar spring 32 can be deflected in both longitudinal directions of the guide body 15. This always happens when the actuating projection 17 guided between the edge strips 37 on the peripheral surface 20 of the guide body 15 is moved in one of the two possible directions by means of the handle 19.

Abstract

The inner tube (11) has an axially extending catch strip. Guided between the inner tube and the outer tube (12) is a slide (16) which can be moved out of a locking position by finger pressure. The slide is capable of holding down a cylinder body (26) held in the catch strip in the locking position by means of a locking surface (23) which can be moved along the catch strip, and of releasing said cylinder body in the unlocking position. In both axial directions of movement, the slide has at least one unlocking region (27) in each case and can be moved counter to a spring restoring force in each case into its positions which release the cylinder body. <IMAGE>

Description

Die Erfindung betrifft ein teleskopierbares Staubsauger-Saugrohr nach dem Oberbegriff des Patentanspruchs 1.The invention relates to a telescopic vacuum cleaner suction pipe according to the preamble of claim 1.

Ein derartiges Staubsauger-Saugrohr ist bereits aus der US-A-3 351 363 bekannt. Auf vorteilhafte Weise ist es bei diesem Stand der Technik möglich, ein Innen- und ein Außenrohr über eine Befestigungs- bzw. Betätigungsvorrichtung axial lösbar miteinander zu arretieren. Die Arretierung von Innen- und Außenrohr kann mittels Fingerdruck auf einen am Außenrohr längsverschieblich gehaltenen, in beiden Axialrichtungen federbelasteten Schieber aufgehoben werden, in dem der Schieber aus der unbelasteten Ruhelage - die zugleich der Verriegelungsstellung entspricht - durch Fingerdruck in eine der beiden Axialrichtungen verschoben wird. Nach der Entlastung des Schiebers vom Fingerdruck gleitet dieser durch Federkraft wieder in seine ursprüngliche Verriegelungsstellung zurück.Such a vacuum cleaner suction tube is already known from US-A-3 351 363. In this prior art, it is advantageously possible to lock an inner and an outer tube axially detachably with one another via a fastening or actuating device. The locking of the inner and outer tube can be released by finger pressure on a slide that is longitudinally displaceable on the outer tube and spring-loaded in both axial directions, in which the slide is moved from the unloaded rest position - which also corresponds to the locking position - into one of the two axial directions by finger pressure. After releasing the slide from finger pressure, it slides back into its original locking position by spring force.

Da derartige teleskopierbare Staubsauger-Saugrohre von sehr unterschiedlichen Benutzern verwendet werden - sie können eine kleine oder große Körperlänge haben, jung oder alt sein bzw. Rechts- oder Linkshänder etc. - muß eine derartige Arretierungs- bzw. Betätigungsvorrichtung möglichst sehr einfach und für jedermann bedienbar sein.Since such telescopic vacuum cleaner suction pipes are used by very different users - they can have a small or large body length, be young or old or right-handed or left-handed, etc. - such a locking or actuating device must be as simple and easy to use as possible for everyone his.

Bei dem bekannten Staubsauger-Saugrohr ist es möglich, durch Bewegung der Handhabe mittels Fingerdruck in beiden Rohrlängsrichtungen jeweils eine Entriegelungsstellung zu erreichen, so daß die Teleskoprohre auseinandergezogen werden können. Zugleich weist das bekannte Staubsauger-Saugrohr die Verriegelungsstellung in der Ruhelage der Feder auf, so daß nach dem Loslassen der Handhabe dieselbe sich aus beiden Entriegelungsstellungen sofort - und ohne Zutun des Benutzers - in die Arretierstellung bewegt. Damit ist es auch technisch ungeschickten bzw. unbegabten Benutzern möglich sein, quasi auf Anhieb die Entriegelungsstellung zu erreichen, da durch die Bewegung der Handhabe in irgendeine der beiden möglichen Längsrichtungen der Rohre der gewünschte Erfolg - also die Entriegelung der Rohre - erreicht wird. Zugleich sind beim Loslassen der Handhabe die Rohre wieder automatisch miteinander verriegelt, so daß man diese Art der Arretierungs- und Betätigungsvorrichtung zu Recht als vollkommen "narrensicher" bezeichnen kann.In the known vacuum cleaner suction tube, it is possible to achieve an unlocking position by moving the handle by means of finger pressure in both longitudinal directions of the tube, so that the telescopic tubes can be pulled apart. At the same time, the known vacuum cleaner suction pipe has the locking position in the rest position of the spring, so that after the handle is released the same moves immediately from both unlocking positions - and without the user doing anything - into the locking position. This makes it technically unskillful or untalented users to be able to reach the unlocking position almost instantly, since the movement of the handle in either of the two possible longitudinal directions of the tubes achieves the desired success - that is, the unlocking of the tubes. At the same time, the tubes are automatically locked together when the handle is released, so that this type of locking and actuating device can rightly be described as completely "foolproof".

Ausgehend vom Gegenstand der US-A-3 351 363, liegt der Erfindung die Aufgabe zugrunde, ein teleskopierbares Staubsauger-Saugrohr zu schaffen, welches eine vereinfachte Bauform größerer Betriebssicherheit gestattet. Die Erfindung löst diese Aufgabe gemäß den Merkmalen des Kennzeichenteils des Anspruchs 1.Based on the subject of US-A-3 351 363, the invention has for its object to provide a telescopic vacuum cleaner suction tube, which allows a simplified design of greater reliability. The invention solves this problem according to the features of the characterizing part of claim 1.

Durch die erfindungsgemäße Konstruktion ist es nicht mehr notwendig, zwei Schraubendruckfedern zu verwenden, sondern eine nur am Führungskörper festgelegte und mit dem Betätigungsansatz verbundene Stabfeder ist in der Lage, entgegen den beiden potentiell möglichen Bewegungsrichtungen eine Federkraft aufzubringen, die in jedem Fall die Rückführung des Schiebers (Handhabe) in die Ruhe- bzw. Verriegelungsstellung herbeiführt.Due to the construction according to the invention, it is no longer necessary to use two helical compression springs, but a rod spring which is only fixed on the guide body and is connected to the actuating shoulder is able to counteract the to apply a spring force to both potentially possible directions of movement, which in any case brings the slide (handle) back into the rest or locking position.

Weitere Vorteile und erfindungswesentliche Merkmale ergeben sich aus dem Unteranspruch sowie aus dem in den Zeichnungen dargestellten Ausführungsbeispiel der Erfindung. Es zeigen:

  • Fig.1 einen Schnitt durch ein teleskopierbares Staubsauger-Saugrohr mit Betätigungs- und Arretierungsvorrichtung, wobei allerdings die Erfindung der nicht dargestellt ist, und
  • Fig. 2 eine Draufsicht auf den Führungskörper einschließlich Betätigungsansatz und Stabfeder.
Further advantages and features essential to the invention result from the subclaim and from the exemplary embodiment of the invention illustrated in the drawings. Show it:
  • 1 shows a section through a telescopic vacuum cleaner suction pipe with actuating and locking device, although the invention is not shown, and
  • Fig. 2 is a plan view of the guide body including the actuating approach and bar spring.

In der Zeichnung ist ein teleskopierbares Staubsauger-Saugrohr insgesamt mit der Bezugsziffer 10 bezeichnet.In the drawing, a telescopic vacuum cleaner suction tube is generally designated by the reference number 10.

Das Saugrohr 10 weist ein Innenrohr 11 und ein Außenrohr 12 auf. Das Außenrohr 12 ist an seinem dargestellten Ende mit einer muffenartigen Aufweitung 13 versehen. In dem zwischen Innenrohr-Außenmantelfläche 28 und Außenrohr-Innenmantelfläche 29 befindlichen Freiraum 14 ist ein im Querschnitt im wesentlichen kreisförmiger Führungskörper 15 aus Kunststoff angeordnet.The suction pipe 10 has an inner pipe 11 and an outer pipe 12. The outer tube 12 is provided at its illustrated end with a sleeve-like widening 13. In the free space 14 located between the inner tube outer jacket surface 28 and the outer tube inner jacket surface 29, a plastic guide body 15 is arranged which is essentially circular in cross section.

Im Führungskörper 15 ist ein entlang der Rohrlängsachse x bewegbarer Schieber 16 gehalten, der aus einem Betätigungsansatz 17 und einer Handhabe 19 besteht. Die Handhabe 19 ist form- und kraftschlüssig mit dem Betätigungsansatz 17 verbunden, der durch eine Aussparung 18 das Außenrohr 12 durchgreift.A slide 16, which is movable along the longitudinal axis x of the tube, is held in the guide body 15 there is an actuating projection 17 and a handle 19. The handle 19 is positively and non-positively connected to the actuating projection 17, which extends through a recess 18 through the outer tube 12.

Der an der Umfangsfläche 20 des Führungskörpers 15 längsverschieblich (in Richtung des Doppelpfeiles) angeordnete Betätigungsansatz 17 ist ist mittels einer sich in ihrer neutralen Federruhelage befindenden ringförmigen Stabfeder 32 mittig in einer durch nicht dargestellte Führungsleisten festgelegten Bewegungsbahn an der Umfangsfläche 20 des Führungskörpers 15 gehalten.The actuating projection 17, which is arranged on the peripheral surface 20 of the guide body 15 so as to be longitudinally displaceable (in the direction of the double arrow), is held in the middle on the peripheral surface 20 of the guide body 15 by means of an annular rod spring 32 located in its neutral spring rest position in a movement path defined by guide strips (not shown).

An der zum Außenrohr 12 weisenden Seite des Betätigungsansatzes 17 ist mittig eine Verriegelungsfläche 23 angeordnet. Diese Verriegelungsfläche 23 kann eine Öffnung 24 im Führungskörper 15 verschließen, wobei in der Öffnung 24 sowie in einer darunter angeordneten Rastausnehmung 25 des Innenrohrs 11 ein Wälzkörper 26 gehalten ist. Beidseitig der Verriegelungsflache 23 des Betätigungsansatzes 17 ist jeweils ein Hohlraum 27 vorhanden, der eine trapezförmige Gestalt aufweist und im Falle der Entriegelung dem Wälzkörper 26 Platz bietet.A locking surface 23 is arranged in the center on the side of the actuating projection 17 facing the outer tube 12. This locking surface 23 can close an opening 24 in the guide body 15, a roller body 26 being held in the opening 24 and in a recess 25 arranged below it in the inner tube 11. On both sides of the locking surface 23 of the actuating projection 17 there is a cavity 27, which has a trapezoidal shape and, in the case of unlocking, offers space for the rolling element 26.

In der Zeichnung ist die Verriegelungsstellung dargestellt, da im vorliegenden Fall die Verriegelungsfläche 23 des Betätigungsansatzes 17 ein Ausweichen des Wälzkörpers 26 nach oben verhindert. Dies bedeutet, daß bei der gezeigten Stellung des Schiebers 19 in Bezug zum Wälzkörper 26 auch eine große Innen- und Außenrohr 11, 12 auseinanderziehende Kraft nicht in der Lage ist, eine Relativbewegung zwischen Innen- und Außenrohr herbeizuführen.In the drawing, the locking position is shown, since in the present case the locking surface 23 of the actuating projection 17 prevents the Rolling body 26 prevented upwards. This means that in the position of the slide 19 shown in relation to the rolling element 26, a large inner and outer tube 11, 12 pulling force is not able to bring about a relative movement between the inner and outer tube.

Falls nun der Schieber 19 und damit natürlich auch der Betätigungsansatz 17 in eine der Richtungen des Doppelpfeiles verschoben wird, so daß sich ein Hohlraum 27 oberhalb der Öffnung 24 im Führungskörper 15 und damit auch oberhalb des Wälzkörpers 26 befindet, würde dieselbe Innen- und Außenrohr 11, 12 auseinanderziehende Kraft bewirken, daß der Wälzkörper 26 aus der Rastausnehmung 25 hinaus in einen Hohlraum 17 gedrückt wird, so daß die Arretierung zwischen Innen- und Außenrohr 11, 12 aufgehoben wird. Bei Wegnahme des Fingerdrucks gleitet der Schieber 19 aufgrund der Federrückstellkraft der Stabfeder 32 wieder in die Ruhelage zurück und wenn gleichzeitig eine Differenzkraft an Innen- und Außenrohr 11, 12 angreift, wird der Wälzkörper 26 in die nächstgelegene Rastausnehmung 25 und somit in eine neue Verriegelungsstellung bewegt.If the slide 19 and thus, of course, the actuating projection 17 is moved in one of the directions of the double arrow, so that there is a cavity 27 above the opening 24 in the guide body 15 and thus also above the roller body 26, the same inner and outer tube 11th , 12 pulling force cause the rolling element 26 to be pressed out of the locking recess 25 into a cavity 17, so that the locking between the inner and outer tubes 11, 12 is released. When the finger pressure is removed, the slide 19 slides back into the rest position due to the spring restoring force of the bar spring 32, and if a differential force acts on the inner and outer tubes 11, 12 at the same time, the rolling element 26 is moved into the closest latching recess 25 and thus into a new locking position .

Die beidendig im Führungskörper 15 gehaltene, ringförmige Stabfeder 32 führt den Betätigungsansatz 17 zwangsweise wieder in die Verriegelungstellung zurück, wenn keine Kraft an der Handhabe 19 mehr angreift. Die Federruhelage des Federstabes 32 müßte dann mit der Verriegelungsstellung übereinstimmen. Bei dieser in Fig. 2 gezeigten Ausführungsform ist die ringförmige Stabfeder 32 in einer Nut 33 an der Umfangsfläche 20 der nicht dargestellten Hälfte des Führungskörpers 15 bis etwa zur Formteilungsebene (Führungsleiste 34) zumindest teilweise gehalten, wobei ein Abschnitt 35 der Stabfeder 32 zugleich in eine Nut 36 des Betätigungsansatzes 17 eingreift. Da die Stabfeder 32 oberhalb der Formteilungsebene zwischen der Nut 33 und der Nut 36 ungeführt ist, kann die Stabfeder 32 in beiden Längsrichtungen des Führungskörpers 15 ausgelenkt werden. Dies geschieht immer dann, wenn der zwischen Randleisten 37 an der Umfangsfläche 20 des Führungskörpers 15 geführten Betätigungsansatz 17 mittels der Handhabe 19 in eine der beiden möglichen Richtungen bewegt wird.The annular rod spring 32 held at both ends in the guide body 15 forcibly returns the actuating projection 17 to the locking position when no more force is applied to the handle 19. The spring rest position of the spring rod 32 would then have to match the locking position. In this in Fig. 2nd In the embodiment shown, the annular bar spring 32 is at least partially held in a groove 33 on the circumferential surface 20 of the half of the guide body 15, not shown, up to approximately the mold-dividing plane (guide bar 34), a section 35 of the bar spring 32 simultaneously engaging in a groove 36 of the actuating projection 17 . Since the bar spring 32 is unguided above the mold division plane between the groove 33 and the groove 36, the bar spring 32 can be deflected in both longitudinal directions of the guide body 15. This always happens when the actuating projection 17 guided between the edge strips 37 on the peripheral surface 20 of the guide body 15 is moved in one of the two possible directions by means of the handle 19.

Claims (2)

  1. A telescopic vacuum cleaner suction pipe (10) comprising an outer pipe (12) and an inner pipe (11), which is provided with an axially extending locking strip, a slide element (16), which is arranged between both pipes (11, 12), is guided on a guide element (15) and is displaceable by finger pressure against a spring restoring force from a locking position, holding down a roller element (26), which is held in a locking recess (25) of the locking strip, by means of a locking surface (23) of its actuating attachment (17) in the position in which the pipes are locked relative to one another, and releasing the roller element (26) in at least one unlocking position, the actuating attachment (17) comprising an unlocking region in both axial directions of movement and being displaceable against a spring restoring force (at 32) in both of its positions releasing the roller element (26), and the respective spring restoring force being created by at least one spring (32) annularly enclosing the guide element (15), characterised in that the annular bar spring (32) generates the respective spring restoring force for both axial movement directions, the annular bar spring (32) is fixed with one region in a retaining groove (33) in the circumferential surface (20) of the guide element (15), the annular bar spring (32) engages with a different region (35) in a groove (36) in the actuating attachment (17), the annular bar spring (32) is unguided between the groove (36) of the actuating attachment (17) and the retaining groove (33) and can therefore be deflected in both axial directions of movement, and the inoperative position of the annular bar spring (32) corresponds to the locking position of the actuating attachment (17).
  2. A telescopic vacuum cleaner suction pipe according to claim 1, characterised in that the circumferential groove (33) extends on the side of the guide element (15) facing away from the actuating attachment (17) approximately as far as the plane of division of said guide element (15).
EP92121753A 1992-01-11 1992-12-22 Telescopic vacuum cleaner suction hose Expired - Lifetime EP0552481B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4200527 1992-01-11
DE4200527A DE4200527C2 (en) 1992-01-11 1992-01-11 Telescopic vacuum cleaner suction pipe

Publications (2)

Publication Number Publication Date
EP0552481A1 EP0552481A1 (en) 1993-07-28
EP0552481B1 true EP0552481B1 (en) 1996-05-15

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ID=6449351

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Application Number Title Priority Date Filing Date
EP92121753A Expired - Lifetime EP0552481B1 (en) 1992-01-11 1992-12-22 Telescopic vacuum cleaner suction hose

Country Status (6)

Country Link
EP (1) EP0552481B1 (en)
AT (1) ATE137936T1 (en)
DE (2) DE4200527C2 (en)
DK (1) DK0552481T3 (en)
ES (1) ES2088079T3 (en)
GR (1) GR3020088T3 (en)

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JP2009531096A (en) * 2006-03-31 2009-09-03 オ エンメ エ チ ソシエタ ペル アチオニ Telescopic extension tube for household appliances

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WO2019029603A1 (en) * 2017-08-09 2019-02-14 天佑电器（苏州）有限公司 Telescopic tube device and vacuum cleaner having same
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TWI393548B (en) * 2006-03-31 2013-04-21 Omec Spa Telescopic extension for an electric household appliance

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Publication number Publication date
DE4200527A1 (en) 1993-07-22
ES2088079T3 (en) 1996-08-01
DE4200527C2 (en) 1995-11-09
EP0552481A1 (en) 1993-07-28
DE59206313D1 (en) 1996-06-20
GR3020088T3 (en) 1996-08-31
ATE137936T1 (en) 1996-06-15
DK0552481T3 (en) 1996-06-03

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