EP2606801B1 - Vacuum cleaner suction hose - Google Patents
Vacuum cleaner suction hose Download PDFInfo
- Publication number
- EP2606801B1 EP2606801B1 EP12196793.9A EP12196793A EP2606801B1 EP 2606801 B1 EP2606801 B1 EP 2606801B1 EP 12196793 A EP12196793 A EP 12196793A EP 2606801 B1 EP2606801 B1 EP 2606801B1
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- EP
- European Patent Office
- Prior art keywords
- teeth
- tube
- locking device
- rack
- clamping
- 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.)
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- 238000006073 displacement reaction Methods 0.000 claims description 11
- 230000007246 mechanism Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 230000003993 interaction Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910000639 Spring steel Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000009964 serging Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/24—Hoses or pipes; Hose or pipe couplings
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/24—Hoses or pipes; Hose or pipe couplings
- A47L9/242—Hose or pipe couplings
- A47L9/244—Hose or pipe couplings for telescopic or extensible hoses or pipes
Definitions
- the invention relates to a vacuum cleaner suction tube with at least one inner tube, at least one outer tube, and at least one locking device according to the preamble of patent claim 1.
- Vacuum cleaner suction tubes are known in a large number of configurations in the prior art, for example from US Pat WO 2005/082222 A1 .
- Vacuum cleaner suction pipes establish the connection between the suction hose of a vacuum cleaner and the suction tool, for example a floor nozzle.
- vacuum cleaner suction tubes can be changed in terms of their length, for example by telescoping an inner tube in an outer tube.
- the length of the vacuum cleaner suction tube is gradually adjusted by moving the inner tube relative to the outer tube.
- the shortest distance of a change in length is determined, for example, by the minimum spacing of a latching recess, which is used to lock the tubes relative to one another.
- the EP 0 937 435 A2 discloses a vacuum cleaner suction tube with an inner tube and an outer tube, the inner tube having embossed recesses that cooperate with a locking mechanism attached to the outer tube.
- the locking mechanism has elastic latching hooks which, in a locking position, engage in the embossed depressions in the inner tube and thus fix the position of the inner tube relative to the outer tube. Actuating the locking mechanism enables the locking hook to move so that it moves elastically out of the recesses in the inner tube against the spring force applied by its holder, which enables the user to adjust the position of the inner tube relative to the outer tube. As soon as the next locking recess is reached, the spring force causes the locking hook to be pressed into it.
- telescopic vacuum cleaner suction tubes are also available from the DE 197 06 210 A1 , from the WO 2004/049891 A1 and the DE 201 03 442 U1 known.
- the vacuum cleaner suction tubes known from the prior art have the disadvantage that a sufficiently temporary stabilization of the set position between the inner tube and the outer tube can only be achieved with an additional spring force that acts on the spring elements, so that even when the locking mechanism is released by the User always has to overcome a spring force in order to move the inner tube relative to the outer tube, which means an additional effort for the user.
- the known vacuum cleaner suction pipes have the disadvantage that the distance between the locking positions is relatively large, which means that only imprecise adjustment is possible.
- the invention is based on the object of specifying a vacuum cleaner suction tube which enables the length to be adjusted precisely and easily.
- the locking device can be moved into the release position by displacement relative to the outer pipe and in the axial direction of the outer pipe, and that the rack is disengaged in the release position by a relative force between the outer pipe and the inner pipe without the influence of a spring force can be pushed out with the rack by the tooth flanks of the teeth of the rack pushing the tooth flanks of the teeth of the rack upwards, whereby the inner tube can be moved relative to the outer tube.
- the locking device can thus be brought into at least one release position by manual displacement in the axial direction of the outer tube.
- the locking device releases a movement of the rack out of engagement with the rack, so that the rack can be pushed back into a recess, for example, without the influence of a spring force, whereby the inner tube and the outer tube can be moved relative to one another.
- the inner tube is guided in the outer tube, the outer diameter of the inner tube preferably corresponding to the inner diameter of the outer tube.
- the length of the vacuum cleaner suction tube is adjusted by moving the inner tube relative to the outer tube or the outer tube relative to the inner tube.
- the space enclosed by the inner tube and the outer tube forms the suction channel that can be used when the vacuum cleaner suction tube is in operation, from the end of the inner tube facing away from the outer tube to the end of the outer tube facing away from the inner tube.
- a locking device which fixes the position of the inner tube relative to the outer tube or of the outer tube relative to the inner tube.
- the locking device has a rack, the teeth of which are held in the locking position in engagement with the teeth of the rack in a wall of the inner tube, whereby a relative movement of the inner tube to the outer tube is blocked.
- the intermeshing teeth of the rack and the rack lead to a power transmission between the inner tube and the outer tube, which prevents a relative movement of the inner tube to the outer tube.
- the toothed strip in the inner tube is preferably stamped into the wall of the inner tube.
- a stainless steel is preferably suitable as the material for the inner tube and the outer tube.
- the locking device In the non-actuated state, the locking device is advantageously in the locking position, so that a relative movement of the outer tube relative to the inner tube is prevented without actuation by the user. If a user moves the locking device out of the locking position into the release position by manual operation by manually shifting the locking device in the axial direction of the outer tube or the inner tube relative to the outer tube, a movement of the rack is released from engagement with the rack. It is not necessary here for all the components of the locking device to be displaced in the axial direction, but rather it is sufficient if only a single component or a plurality of components of the locking device are moved.
- the toothed rack In the release position, the toothed rack can thus move radially to the vacuum cleaner suction pipe without a spring force or any other elastic force acting on the toothed rack. In the release position, only its weight acts on the rack; the rack is otherwise preferably free of force. The rack is held in its position preferably in a form-fitting manner with little play.
- the tooth flanks of the teeth of the toothed rack slide against the flanks of the teeth of the Rack upwards so that the rack moves on the rack like a ratchet while the inner tube is telescoped relative to the outer tube.
- the rack can consequently move on the rack without spring force as long as the locking device is in the release position.
- the toothed rack is only held by its weight in engagement with the toothed bar, which can be overcome by applying the relative force.
- the teeth of the rack and the teeth of the rack are preferably of the same size, so that the teeth mesh with one another in an advantageous manner.
- the teeth of the rack and the teeth of the rack also preferably have straight teeth, so that in the release position the flanks can advantageously slide past one another.
- the teeth of the rack and the teeth of the rack are arranged orthogonally to the axis of the outer tube and the inner tube.
- the vacuum cleaner suction tube described has the advantage that the locking device is actuated in the same direction as the direction of adjustment of the inner tube and the outer tube, whereby a particularly advantageous adjustment can be made by a user, since the forces for unlocking and adjusting are in the same axis be applied.
- a user can consequently grasp the locking device with one hand in order to bring it into the release position, while with the other hand he applies a displacement force to the inner tube so that the inner tube moves relative to the outer tube and an adjustment of the length of the vacuum cleaner Suction pipe takes place.
- the large number of teeth on the rack and the rack has the advantage over locking devices with only one or two locking hooks that a larger area is available for power transmission. Due to the large area, a spring force for holding the locking hooks in their engaged position is unnecessary.
- a plurality of inner tubes or a plurality of outer tubes are present, so that a plurality of locking devices is also provided, whereby the vacuum cleaner suction pipe can be adjusted at several points, which preferably corresponds to the number of locking devices.
- the locking device has a spring, and that the spring produces a force when the locking device is deflected from the locking position, with which the locking device in the locking position can be reset.
- the spring In the locking position, the spring is preferably unloaded or at least only slightly loaded, so that the locking device is held in the locking position when there is no actuation by a user. If the user now deflects the locking device from the locking position - by moving the locking device relative to the outer tube in its axial direction, the spring is elongated or compressed, so that it creates a restoring force from the release position into the locking position. The locking device is thus always automatically returned to the locking position, if the user does not act on the locking device. For the release position, this means that the locking device must be actively held by the user in the release position in order to adjust the length of the vacuum cleaner suction tube.
- the spring is designed, for example, as a helical spring that is subjected to tension and / or compression; alternatively, the spring is designed, for example, as a metal ring made of spring steel, which is deflected in such a way that a restoring force is produced.
- the force of the spring always acts in such a way that the locking device is returned to the locking position.
- Any spring element that is suitable for applying a restoring force to the locking device is suitable as a spring.
- the locking device has an outer sleeve, that the outer sleeve is pushed onto the outer tube in an end region and that the release position is reached by axially displacing the sleeve.
- the displacement of the outer sleeve as part of the locking device consequently leads to the fact that a movement of the rack is released from engagement with the rack and the tooth flanks of the teeth of the rack are against the tooth flanks of the teeth of the rack due to the relative force applied by the user , slide up.
- the outer sleeve is preferably designed and manufactured to be closed in an annular manner and, for assembly, is pushed onto the outer tube in an end region and fastened to it.
- the outer sleeve is movable, namely at least slightly displaceable in the axial direction of the outer tube, attached to the outer tube.
- a user grips the outer sleeve on the outer tube with one hand and moves it in the axial direction into the release position so that the length of the vacuum cleaner suction tube can be adjusted with the other hand by moving the inner tube.
- the design of the outer sleeve as a ring-shaped closed component has the advantage over the sleeves composed of several half-shells that greater stability and a more sophisticated haptic impression can be achieved.
- the outer sleeve has a web, that the web reaches through the wall of the outer tube in an opening, and that the web cooperates with the spring arranged in the outer tube.
- the outer sleeve is movably attached to the outer pipe, the web preferably being arranged on the side of the outer sleeve facing the outer pipe and reaching through the wall of the outer pipe, which has an opening for this purpose. The end of the web is consequently located inside the outer tube.
- the spring which is preferably also arranged inside the outer tube, is connected, for example, to the web, so that when the outer sleeve moves relative to the outer tube, the spring is actuated by the web and thus its restoring force into the locking position via the web on the outer sleeve and thus exerted on the locking device.
- the web is preferably formed in one piece with the outer sleeve.
- the outer tube is widened in an end region, that the locking device has an inner sleeve, and that the inner sleeve is arranged in the widened end region.
- the outer tube is preferably widened at least in the end region that faces the inner tube.
- the enlargement means a partial or complete enlargement of the inside and outside diameter of the outer tube in a section in the end area.
- the expansion preferably corresponds to the material thickness of the inner sleeve, which is arranged in this end area, so that the inner diameter of the inner sleeve corresponds approximately to the outer diameter of the inner tube.
- the inner sleeve is preferably firmly connected to the outer tube, so that, for example, the spring for resetting the locking device into the locking position is held on the inner sleeve.
- the inner sleeve also optionally has sealing elements that seal the transition area between the inner pipe and the outer pipe.
- the rack is guided in the inner sleeve, for example by the rack is guided in an opening in the inner sleeve with little play, so that a movement of the rack is radial to the vacuum cleaner suction tube is possible, but a movement of the rack - with the exception of the small play - in the other spatial directions is prevented by the inner sleeve.
- the rack is preferably fixed in its position relative to the inner sleeve. In the assembled state, the wall of the outer tube with the enlarged end region is consequently located between the inner sleeve and the outer sleeve.
- the locking device has a clamping bar, that the clamping bar in the locking position acts on the surface of the rack opposite the teeth, and that the clamping bar in the release position causes the rack to move out of engagement with the Toothed bar releases.
- the clamping bar acts on the rear side - namely the surface of the rack opposite the teeth - and thus presses the rack - the teeth of the rack - into engagement with the rack, which prevents movement of the inner tube relative to the outer tube.
- the clamping web exerts, for example, a force on the rack which is directed radially towards the vacuum cleaner suction tube.
- the contact between the clamping bar and the rack is changed in such a way that the rack can move away from the rack, which means that the teeth of the rack are no longer in engagement with the teeth of the rack and the inner tube can be telescoped to the outer tube.
- the influencing of the clamping web for releasing or locking takes place by axial displacement of at least part of the locking device, preferably the outer sleeve.
- the interaction between the clamping web and rack is improved in that the clamping web has clamping teeth, that the rack has control teeth on the surface facing away from the teeth, that in the locking position the tooth tips of the clamping teeth act on the control teeth, and that an axial displacement of the locking device of the Clamping web is moved relative to the rack, so that the clamping teeth and the control teeth can be brought into engagement in the release position.
- the tooth tips of the clamping teeth which are preferably flattened, exert a force on the control teeth of the rack, the force preferably also being exerted on the tooth tips of the control teeth, which are preferably also flattened.
- the power transmission between the clamping teeth and the control teeth keeps the rack in the locked position in engagement with the rack.
- the clamping bar is moved relative to the rack, preferably in the axial direction of the outer tube, so that the tooth tips of the clamping teeth are no longer on the tooth tips of the control teeth, but the clamping teeth and the control teeth can be brought into engagement, whereby a movement of the rack in radial direction to the vacuum cleaner suction tube is possible, which corresponds approximately to a tooth height of the clamping teeth or control teeth.
- the clamping teeth and control teeth are preferably of the same size and larger than the teeth of the rack or the rack.
- the movement of the locking device in the axial direction preferably corresponds to about half the width of a tooth base of a clamping tooth or a control tooth, so that the tooth tips positioned on top of one another can be moved into the closest valley between the control teeth of the rack or the clamping teeth of the clamping web.
- the size of the clamping teeth or the control teeth is accordingly so large that the width of a tooth root is between 0.5 and 15 mm.
- the tooth tips of the clamping teeth and the tooth tips of the control teeth are preferably flattened so that the flattened tips of the clamping teeth and the control teeth can advantageously be positioned on top of one another in the locking position.
- the clamping web is designed as a separate component or, alternatively, is designed in one piece with the inner sleeve, so that the inner sleeve has the clamping teeth.
- the clamping web is arranged and guided in the inner sleeve.
- the clamping teeth of the clamping web and the control teeth of the rack are at least temporarily in engagement, namely precisely when the rack is lifted up by sliding the teeth on the teeth of the rack.
- the teeth of the rack are temporarily no longer in engagement with the teeth of the rack.
- the rack is preferably guided with little play, for example in the inner sleeve, so that in the release position only a movement in the radial direction to the vacuum cleaner suction tube is possible, which is limited by the clamping web or the height of the clamping or control teeth.
- the vacuum cleaner suction tube can be telescoped in the release position.
- the clamping web can be moved through the web of the outer sleeve.
- the web of the outer sleeve reaches through the wall of the outer tube so that the end of the web is located inside the outer tube.
- the web is preferably connected to the spring on the inside of the outer tube so that it interacts with the spring.
- the locking device is actuated by moving the sleeve axially on the outer tube.
- the clamping web is connected to the outer sleeve in such a way that the clamping web is moved through the web when the outer sleeve is moved.
- a slide is provided within the outer tube for this purpose, on which the clamping web is arranged and which is guided on the inner tube by reaching around it at least halfway.
- the web causes an axial movement of the carriage and thus a displacement of the clamping web from the locking position into the release position and vice versa.
- the connection between the web and the clamping web is optionally designed as a simple guide made of plastic or as part of the inner sleeve.
- the web of the outer sleeve is preferably connected to the spring and the clamping web at the same time, so that the spring in the release position always brings about a return of the clamping web to the locking position.
- the web is consequently connected to the clamping web in such a way that when the outer sleeve is displaced in the axial direction, the clamping web is also moved in the same axial direction, whereby the clamping teeth of the clamping web move relative to the control teeth of the rack and the release position is achieved.
- This allows the rack to move in the radial direction and the inner tube and the outer tube can be telescoped.
- control teeth have a tooth root width which corresponds to twice the tooth root width of the teeth.
- Half of the tooth root width of the control teeth corresponds approximately to the distance by which the locking device, in particular the outer sleeve of the locking device, has to be moved in order to move from the locking position into the release position. It follows from this that the locking device has to be moved approximately by a tooth width of the teeth of the rack in order to move from the locking position into the release position.
- a tooth base width of the teeth of the rack is also approximately the distance by which the vacuum cleaner suction tube can be telescoped minimally.
- the embodiment according to the invention is advantageous in that the rack has between five and fifteen teeth, in particular that the rack has exactly eight teeth.
- a number between five and fifteen teeth of the rack leads to an advantageous stability of the lock in the locking position and reliably prevents the outer tube and the inner tube from being displaced relative to one another in the locking position, for example by breaking off teeth, since between five and fifteen teeth one Provide sufficient space for the teeth to transmit force.
- eight teeth have proven to be particularly advantageous.
- the clamping bar has between two and five clamping teeth and the rack between three and six control teeth, in particular the clamping bar has exactly three clamping teeth and the rack has exactly three whole and two half control teeth.
- the clamping teeth and the control teeth only interlock temporarily in the release position of the vacuum cleaner suction tube, namely when the rack is moved away from the rack, in that the flanks of the teeth of the rack and the rack slide up against one another.
- the aforementioned number of clamping teeth and control teeth leads to a reliable interaction of the clamping web and the rack, without the rack, for example, is tilted or unstable.
- the rack can be advantageously guided in particular by half control teeth which are each arranged at the end of the clamping web.
- the operation of the locking device is simplified in that the locking device can be deflected in the axial direction in two directions, and consequently can be brought into two release positions.
- the axial movement of the locking device, in particular the outer sleeve of the locking device can thus take place both in the direction of the inner tube and in the direction away from the inner tube, with a release position always being reached.
- the spring is provided in such a way that it always creates a restoring force in both directions into the locking position.
- the clamping web is also moved in one direction as well as in the other direction and, in the release position, enables the rack to evade the engagement of the rack teeth with the rack.
- Fig. 1 shows an embodiment of a vacuum cleaner suction pipe 1 with an inner pipe 2, an outer pipe 3 and a locking device 4.
- the inner pipe 2 has a toothed strip 5, which is stamped into the inner pipe 2 in this embodiment.
- the locking device 4 is displaceable attached to the outer tube 3 and can be brought into a release position by manual actuation by a user from a locking position - shown.
- the locking device 4 has a toothed rack 6, the teeth of which are held in the locking position shown in engagement with the teeth of the rack 5 of the inner tube 2, whereby the inner tube 2 is fixed in terms of its position relative to the outer tube 3 and the vacuum cleaner suction tube 1 is not telescopic is.
- the locking device 4 can be brought into a release position.
- the rack 6 In the release position, the rack 6 is freely movable in such a way that it can be pushed back out of engagement with the rack 5 without the influence of a spring force, whereby the inner tube 2 and the outer tube 3 can be displaced towards one another by a relative force applied by a user .
- the toothed rack 6 is pushed upwards out of engagement with the toothed rack 5 in that the tooth flanks of the teeth of the toothed rack 6 slide on the teeth of the toothed rack 5.
- the locking device 4 has a spring 7 which, when the locking device 4 is deflected from the locking position into the release position, produces a force which resets the locking device 4 into the locking position. In the non-actuated state, the locking device 4 is therefore always in the locking position.
- the locking device 4 has an outer sleeve 8 which is held on the outer tube 3 so as to be displaceable relative to the outer tube 3 in the axial direction.
- the outer sleeve 8 is in Fig. 1 Slidable both to the left and to the right, with a release position being reached in both directions.
- the outer sleeve 8 is pushed onto the end region of the outer tube 3 and connected to the outer tube 3.
- the outer sleeve 8 has a web 9 which reaches through the wall of the outer tube in an opening 10, so that the web 9 cooperates with the spring 7 arranged in the outer tube 3. If the outer sleeve 8 according to Fig. 1 deflected to the left or right, the spring 7 causes a restoring force which restores the locking device 4, in particular the outer sleeve 8, into the locking position.
- the in Fig. 1 The illustrated end region of the outer tube 3 is in this exemplary embodiment expanded, with an inner sleeve 11 of the locking device 4 being introduced into the expanded end region of the outer tube 3.
- the inner sleeve 11 is connected to the spring 7, holds the spring 7 in its position and thus represents an abutment for the spring 7.
- the locking device 4 furthermore has a clamping web 12 which acts with clamping teeth 13 on control teeth 14 of the rack 6 in such a way that the teeth of the rack 6 are held in engagement with the rack 5 in the locking position.
- the control teeth 14 are arranged on the surface opposite the teeth of the rack 6.
- the tooth tips of the clamping teeth 13 and the tooth tips of the control teeth 14 are flattened in this embodiment and are in contact with one another in the locking position.
- the web 9 of the outer sleeve 8 is connected to the clamping web 12 in such a way that if the outer sleeve 8 in one direction - according to Fig. 1 to the left or to the right - is moved, the clamping web 12 is moved along with the web 8, so that the clamping web 12 moves parallel to the outer sleeve 8. To reach the release position, the clamping web 12 is thus to the left or right - according to Fig.
- Fig. 2 shows a section of an embodiment of a vacuum cleaner suction tube 1.
- the cutting plane is rotated by 90 °.
- an end region 15 of the inner tube 2 is shown, in which a device for connecting the vacuum cleaner suction tube 1 to a suction hose is arranged.
- the device is well known in the prior art and is therefore not described in more detail.
- the vacuum cleaner suction tube is set to its shortest length, so that the inner tube 2 runs completely inside the outer tube 3 and only the end region 15 with the device for connecting protrudes from the outer tube 3.
- FIG. 2 The locking device 4 is shown on the right with an outer sleeve 8 attached to the enlarged end region of the outer tube 3.
- the toothed strip 5 of the inner tube 2 can be seen from within the inner tube.
- the toothed strip 5 is embossed in the wall of the inner tube 2.
- the inner sleeve 11 is introduced into the enlarged end area of the outer tube 3.
- the spring 7, which is fixed laterally in the inner sleeve 11, serves to reset the locking device 4 into the locking position shown.
- the outer sleeve 8 is fastened axially displaceably on the outer tube 3.
- Fig. 3 shows an embodiment of a vacuum cleaner suction tube 1 in a perspective view.
- the inner tube 2 protrudes from the outer tube 3.
- the end region 15 of the inner tube 2 is used for the known connection to the suction hose of a vacuum cleaner.
- the end region 16 of the outer tube 3 is used - also known - connection, for. B. with a floor nozzle.
- the design of the end regions 15 of the inner tube and of the end region 16 of the outer tube is sufficiently known in the prior art, so that it will not be discussed further.
- the length of the inner tube 2 corresponds approximately to the length of the outer tube 3.
- the clamping web 6 is arranged on a slide 17.
- the clamping web 6 is connected to the web 9 of the outer sleeve 8 via the slide 17, so that when the web 9 moves - through the outer sleeve 8 - the carriage 17 and thus the clamping web 6 are moved.
- the clamping web 6 thus moves parallel to the outer sleeve 8 and is movable between the release position and the locking position.
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- Electric Vacuum Cleaner (AREA)
Description
Die Erfindung betrifft ein Staubsauger-Saugrohr mit mindestens einem Innenrohr, mindestens einem Außenrohr, und mindestens einer Verriegelungsvorrichtung gemäß dem Oberbegriff von Patentanspruch 1.The invention relates to a vacuum cleaner suction tube with at least one inner tube, at least one outer tube, and at least one locking device according to the preamble of
Staubsauger-Saugrohre sind in einer Vielzahl von Ausgestaltungen im Stand der Technik bekannt, beispielsweise aus der
Die
Weitere teleskopierbare Staubsauger-Saugrohre sind auch aus der
Die aus dem Stand der Technik bekannten Staubsauger-Saugrohre weisen den Nachteil auf, dass eine ausreichend temporäre Stabilisierung der eingestellten Position zwischen Innenrohr und Außenrohr nur mit einer zusätzlichen Federkraft zu realisieren ist, die auf die Federelemente wirkt, so dass auch bei gelöstem Verriegelungsmechanismus durch den Benutzer stets eine Federkraft überwunden werden muss, um das Innenrohr relativ zum Außenrohr zu verschieben, was für den Benutzer eine zusätzliche Anstrengung bedeutet. Ferner weisen die bekannten Staubsauger-Saugrohre den Nachteil auf, dass der Abstand zwischen den Verriegelungspositionen relativ groß ist, wodurch eine nur unpräzise Einstellung möglich ist.The vacuum cleaner suction tubes known from the prior art have the disadvantage that a sufficiently temporary stabilization of the set position between the inner tube and the outer tube can only be achieved with an additional spring force that acts on the spring elements, so that even when the locking mechanism is released by the User always has to overcome a spring force in order to move the inner tube relative to the outer tube, which means an additional effort for the user. Furthermore, the known vacuum cleaner suction pipes have the disadvantage that the distance between the locking positions is relatively large, which means that only imprecise adjustment is possible.
Ausgehend von dem vorgenannten Stand der Technik liegt der Erfindung die Aufgabe zugrunde, ein Staubsauger-Saugrohr anzugeben, das eine präzise und unkomplizierte Einstellung der Länge ermöglicht.On the basis of the aforementioned prior art, the invention is based on the object of specifying a vacuum cleaner suction tube which enables the length to be adjusted precisely and easily.
Die vorgenannte Aufgabe ist bei dem Eingangs genannten Staubsauger-Saugrohr gelöst mit den Merkmalen des Kennzeichnungsteils von Patentanspruch 1.The aforementioned object is achieved in the case of the vacuum cleaner suction pipe mentioned at the beginning with the features of the characterizing part of
Auf das beschriebene Staubsauger-Saugrohr trifft zu, dass die Verriegelungsvorrichtung durch Verschiebung relativ zum Außenrohr und in Achsrichtung des Außenrohrs in die Freigabeposition verbringbar ist, und dass die Zahnstange in der Freigabeposition durch eine Relativkraft zwischen Außenrohr und Innenrohr ohne den Einfluss einer Federkraft aus dem Eingriff mit der Zahnleiste herausdrückbar ist, indem die Zahnflanken der Zähne der Zahnleiste die Zahnflanken der Zähne der Zahnstange nach oben schieben, wodurch das Innenrohr relativ zum Außenrohr verschiebbar ist. Die Verriegelungsvorrichtung ist somit durch manuelle Verschiebung in Axialrichtung des Außenrohrs in mindestens eine Freigabeposition verbringbar. In der Freigabeposition gibt die Verriegelungsvorrichtung eine Bewegung der Zahnstange aus dem Eingriff mit der Zahnleiste frei, so dass die Zahnstange ohne den Einfluss einer Federkraft beispielsweise in einen Rücksprung zurückdrückbar ist, wodurch das Innenrohr und das Außenrohr relativ zueinander verschiebbar sind.It applies to the vacuum cleaner suction pipe described that the locking device can be moved into the release position by displacement relative to the outer pipe and in the axial direction of the outer pipe, and that the rack is disengaged in the release position by a relative force between the outer pipe and the inner pipe without the influence of a spring force can be pushed out with the rack by the tooth flanks of the teeth of the rack pushing the tooth flanks of the teeth of the rack upwards, whereby the inner tube can be moved relative to the outer tube. The locking device can thus be brought into at least one release position by manual displacement in the axial direction of the outer tube. In the release position, the locking device releases a movement of the rack out of engagement with the rack, so that the rack can be pushed back into a recess, for example, without the influence of a spring force, whereby the inner tube and the outer tube can be moved relative to one another.
Das Innenrohr ist im Außenrohr geführt, wobei vorzugsweise der Außendurchmesser des Innenrohrs dem Innendurchmesser des Außenrohrs entspricht. Die Länge des Staubsauger-Saugrohrs, also die Länge des Außenrohrs mit anschließendem Innenrohr, wird durch Verschieben des Innenrohrs relativ zum Außenrohr bzw. des Außenrohrs relativ zum Innenrohr eingestellt. Der vom Innenrohr und vom Außenrohr umschlossene Raum bildet von dem vom Außenrohr abgewandten Ende des Innenrohrs bis zum vom Innennrohr abgewandten Ende des Außenrohrs den im Betrieb des Staubsauger-Saugrohrs nutzbaren Saugkanal.The inner tube is guided in the outer tube, the outer diameter of the inner tube preferably corresponding to the inner diameter of the outer tube. The length of the vacuum cleaner suction tube, that is to say the length of the outer tube with the subsequent inner tube, is adjusted by moving the inner tube relative to the outer tube or the outer tube relative to the inner tube. The space enclosed by the inner tube and the outer tube forms the suction channel that can be used when the vacuum cleaner suction tube is in operation, from the end of the inner tube facing away from the outer tube to the end of the outer tube facing away from the inner tube.
Um zu verhindern, dass sich die Länge des Staubsauger-Saugrohrs während der Benutzung unbeabsichtigt verstellt, ist eine Verriegelungsvorrichtung vorgesehen, die die Position des Innenrohrs zum Außenrohr bzw. des Außenrohrs zum Innenrohr fixiert. Die Verriegelungsvorrichtung weist eine Zahnstange auf, deren Zähne in der Verriegelungsposition im Eingriff mit den Zähnen der Zahnleiste in einer Wand des Innenrohrs gehalten wird, wodurch eine Relativbewegung des Innenrohrs zum Außenrohr blockiert wird. Die ineinandergreifenden Zähne der Zahnleiste und der Zahnstange führen zu einer Kraftübertragung zwischen Innenrohr und Außenrohr, die eine Relativbewegung des Innenrohrs zum Außenrohr verhindert. Die Zahnleiste im Innenrohr ist vorzugsweise in die Wand des Innenrohrs eingeprägt. Als Material für das Innenrohr und das Außenrohr eignet sich dazu vorzugsweise ein rostfreier Stahl.In order to prevent the length of the vacuum cleaner suction tube from being unintentionally adjusted during use, a locking device is provided which fixes the position of the inner tube relative to the outer tube or of the outer tube relative to the inner tube. The locking device has a rack, the teeth of which are held in the locking position in engagement with the teeth of the rack in a wall of the inner tube, whereby a relative movement of the inner tube to the outer tube is blocked. The intermeshing teeth of the rack and the rack lead to a power transmission between the inner tube and the outer tube, which prevents a relative movement of the inner tube to the outer tube. The toothed strip in the inner tube is preferably stamped into the wall of the inner tube. A stainless steel is preferably suitable as the material for the inner tube and the outer tube.
Die Verriegelungsvorrichtung befindet sich im unbetätigten Zustand vorteilhaft in der Verriegelungsposition, so dass eine Relativbewegung des Außenrohrs relativ zum Innenrohr ohne Betätigung des Benutzers verhindert wird. Verbringt ein Benutzer die Verriegelungsvorrichtung durch manuelle Betätigung aus der Verriegelungsposition in die Freigabeposition, indem er die Verriegelungsvorrichtung manuell in Axialrichtung des Außenrohrs bzw. des Innenrohrs relativ zum Außenrohr verschiebt, wird eine Bewegung der Zahnstange aus dem Eingriff mit der Zahnleiste freigegeben. Dabei ist es nicht erforderlich, dass sämtliche Bauelemente der Verriegelungsvorrichtung in Achsrichtung verschoben werden, sondern es reicht aus, wenn lediglich ein einzelnes Bauelement oder eine Mehrzahl von Bauelementen der Verriegelungsvorrichtung bewegt werden.In the non-actuated state, the locking device is advantageously in the locking position, so that a relative movement of the outer tube relative to the inner tube is prevented without actuation by the user. If a user moves the locking device out of the locking position into the release position by manual operation by manually shifting the locking device in the axial direction of the outer tube or the inner tube relative to the outer tube, a movement of the rack is released from engagement with the rack. It is not necessary here for all the components of the locking device to be displaced in the axial direction, but rather it is sufficient if only a single component or a plurality of components of the locking device are moved.
Die Zahnstange kann sich somit in der Freigabeposition radial zum Staubsauger-Saugrohr bewegen, ohne dass eine Federkraft oder eine sonstige elastische Kraft auf die Zahnstange wirkt. Auf die Zahnstange wirkt in der Freigabeposition lediglich ihre Gewichtskraft; die Zahnstange ist ansonsten vorzugsweise kraftfrei. Die Zahnstange wird in ihrer Position vorzugsweise formschlüssig mit geringem Spiel gehalten.In the release position, the toothed rack can thus move radially to the vacuum cleaner suction pipe without a spring force or any other elastic force acting on the toothed rack. In the release position, only its weight acts on the rack; the rack is otherwise preferably free of force. The rack is held in its position preferably in a form-fitting manner with little play.
Befindet sich die Verriegelungsvorrichtung in der Freigabeposition und ein Benutzer erzeugt eine in Achsrichtung wirkende Relativkraft zwischen Innenrohr und Außenrohr, indem er beispielsweise das Außenrohr festhält und eine axiale Kraft auf das Innenrohr ausübt, schieben sich die Zahnflanken der Zähne der Zahnleiste an den Flanken der Zähne der Zahnstange nach oben, so dass sich die Zahnstange ratschenartig auf der Zahnleiste fortbewegt, während das Innenrohr relativ zum Außenrohr teleskopiert wird. Die Zahnstange kann sich folglich federkraftfrei auf der Zahnleiste bewegen, solange sich die Verriegelungsvorrichtung in der Freigabeposition befindet. Je nach Ausrichtung des Staubsauger-Saugrohrs wird die Zahnstange lediglich von ihrer Gewichtskraft im Eingriff mit der Zahnleiste gehalten, die durch Aufbringen der Relativkraft überwunden werden kann.If the locking device is in the release position and a user generates a relative force acting in the axial direction between the inner tube and the outer tube, for example by holding the outer tube and exerting an axial force on the inner tube, the tooth flanks of the teeth of the toothed rack slide against the flanks of the teeth of the Rack upwards so that the rack moves on the rack like a ratchet while the inner tube is telescoped relative to the outer tube. The rack can consequently move on the rack without spring force as long as the locking device is in the release position. Depending on the orientation of the vacuum cleaner suction tube, the toothed rack is only held by its weight in engagement with the toothed bar, which can be overcome by applying the relative force.
Vorzugsweise sind die Zähne der Zahnleiste und die Zähne der Zahnstange gleich groß, so dass ein vorteilhafter Eingriff der Zähne ineinander erfolgt. Die Zähne der Zahnleiste und die Zähne der Zahnstange weisen ferner vorzugsweise auch eine Geradverzahnung auf, so dass in der Freigabeposition die Flanken vorteilhaft aneinander vorbei gleiten können. Die Zähne der Zahnleiste und die Zähne der Zahnstange sind orthogonal zur Achse des Außenrohrs bzw. des Innenrohrs angeordnet.The teeth of the rack and the teeth of the rack are preferably of the same size, so that the teeth mesh with one another in an advantageous manner. The teeth of the rack and the teeth of the rack also preferably have straight teeth, so that in the release position the flanks can advantageously slide past one another. The teeth of the rack and the teeth of the rack are arranged orthogonally to the axis of the outer tube and the inner tube.
Dass sich die Zahnstange in der Freigabeposition vollkommen frei in der Verriegelungsvorrichtung bewegen kann ist auch daran zu erkennen, dass wenn das Staubsauger-Saugrohr in der Freigabeposition derart gehalten wird, dass sich die Zahnstange unterhalt des Außenrohrs bzw. des Innenrohrs befindet, die Zahnstange durch ihre Gewichtskraft aus dem Eingriff mit der Zahnleiste gehoben wird, so dass bei derartiger Halterung ein Teleskopieren des Innenrohrs relativ zum Außenrohr möglich ist, ohne dass die Zähne der Zahnleiste sich an den Zähnen der Zahnstange hochschieben.That the rack can move completely freely in the locking device in the release position can also be seen from the fact that when the vacuum cleaner suction tube is held in the release position in such a way that the rack is located under the outer tube or the inner tube, the rack through its Weight force is lifted out of engagement with the rack, so that with such a holder a telescoping of the inner tube relative to the outer tube is possible without the teeth of the rack pushing up on the teeth of the rack.
Das beschriebene Staubsauger-Saugrohr weist den Vorteil auf, dass die Betätigung der Verriegelungsvorrichtung in identischer Richtung mit der Verstellrichtung des Innenrohrs und des Außenrohrs erfolgt, wodurch eine besonders vorteilhafte Verstellung durch einen Benutzer erfolgen kann, da die Kräfte zum Entriegeln und Verstellen in der gleichen Achse aufgebracht werden. Ein Benutzer kann folglich mit der einen Hand die Verriegelungsvorrichtung umgreifen, um diese in die Freigabeposition zu verbringen, während er mit der anderen Hand eine Verschiebekraft auf das Innenrohr aufbringt, so dass sich das Innenrohr relativ zum Außenrohr bewegt und eine Einstellung der Länge des Staubsauger-Saugrohrs erfolgt. Die Vielzahl der Zähne an der Zahnstange und der Zahnleiste hat gegenüber Verriegelungsvorrichtungen nur mit einem oder zwei Rasthaken den Vorteil, dass eine größere Fläche zur Kraftübertragung zur Verfügung steht. Aufgrund der großen Fläche wird eine Federkraft zur Halterung der Rasthaken in ihrer Eingriffsposition entbehrlich.The vacuum cleaner suction tube described has the advantage that the locking device is actuated in the same direction as the direction of adjustment of the inner tube and the outer tube, whereby a particularly advantageous adjustment can be made by a user, since the forces for unlocking and adjusting are in the same axis be applied. A user can consequently grasp the locking device with one hand in order to bring it into the release position, while with the other hand he applies a displacement force to the inner tube so that the inner tube moves relative to the outer tube and an adjustment of the length of the vacuum cleaner Suction pipe takes place. The large number of teeth on the rack and the rack has the advantage over locking devices with only one or two locking hooks that a larger area is available for power transmission. Due to the large area, a spring force for holding the locking hooks in their engaged position is unnecessary.
Es ist des Weiteren auch vorgesehen, dass eine Mehrzahl von Innenrohren oder eine Mehrzahl von Außenrohren vorhanden ist, so dass auch eine Mehrzahl von Verriegelungsvorrichtungen vorgesehen ist, wodurch das Staubsauger-Saugrohr an mehreren Stellen, die vorzugsweise der Anzahl der Verriegelungsvorrichtungen entspricht, verstellbar ist.It is furthermore provided that a plurality of inner tubes or a plurality of outer tubes are present, so that a plurality of locking devices is also provided, whereby the vacuum cleaner suction pipe can be adjusted at several points, which preferably corresponds to the number of locking devices.
Um die Einstellung der Länge des Staubsauger-Saugrohrs für einen Benutzer weiter zu vereinfachen, ist gemäß einer ersten Ausgestaltung vorgesehen, dass die Verriegelungsvorrichtung eine Feder aufweist, und dass die Feder bei Auslenkung der Verriegelungsvorrichtung aus der Verriegelungsposition eine Kraft hervorruft, mit der die Verriegelungsvorrichtung in die Verriegelungsposition zurückstellbar ist. Die Feder ist in der Verriegelungsposition vorzugsweise unbelastet oder jedenfalls nur gering belastet, so dass die Verriegelungsvorrichtung in der Verriegelungsposition gehalten wird, wenn keine Betätigung durch einen Benutzer erfolgt. Lenkt der Benutzer nun die Verriegelungsvorrichtung aus der Verriegelungsposition aus - indem er die Verriegelungsvorrichtung relativ zum Außenrohr in dessen Achsrichtung verschiebt, wird die Feder elongiert oder gestaucht, so dass sie eine Rückstellkraft aus der Freigabeposition in die Verriegelungsposition hervorruft. Die Verriegelungsvorrichtung wird somit stets automatisch in die Verriegelungsposition zurückgestellt, wenn der Benutzer nicht auf die Verriegelungsvorrichtung einwirkt. Für die Freigabeposition bedeutet das, dass die Verriegelungsvorrichtung aktiv von dem Benutzer in der Freigabeposition gehalten werden muss, um ein Verstellen der Länge des Staubsauger-Saugrohrs vorzunehmen.In order to further simplify the adjustment of the length of the vacuum cleaner suction tube for a user, it is provided according to a first embodiment that the locking device has a spring, and that the spring produces a force when the locking device is deflected from the locking position, with which the locking device in the locking position can be reset. In the locking position, the spring is preferably unloaded or at least only slightly loaded, so that the locking device is held in the locking position when there is no actuation by a user. If the user now deflects the locking device from the locking position - by moving the locking device relative to the outer tube in its axial direction, the spring is elongated or compressed, so that it creates a restoring force from the release position into the locking position. The locking device is thus always automatically returned to the locking position, if the user does not act on the locking device. For the release position, this means that the locking device must be actively held by the user in the release position in order to adjust the length of the vacuum cleaner suction tube.
Die Feder ist beispielsweise als Schraubenfeder ausgestaltet, die auf Zug und/oder Druck belastet wird, alternativ ist die Feder beispielsweise als Metallring aus einem Federstahl ausgestaltet, der derart ausgelenkt wird, dass eine Rückstellkraft hervorgerufen wird. Die Kraft der Feder wirkt dabei stets derart, dass die Verriegelungsvorrichtung in die Verriegelungsposition zurückgestellt wird. Als Feder eignet sich jedes Federelement, dass geeignet ist, eine Rückstellkraft auf die Verriegelungsvorrichtung aufzubringen.The spring is designed, for example, as a helical spring that is subjected to tension and / or compression; alternatively, the spring is designed, for example, as a metal ring made of spring steel, which is deflected in such a way that a restoring force is produced. The force of the spring always acts in such a way that the locking device is returned to the locking position. Any spring element that is suitable for applying a restoring force to the locking device is suitable as a spring.
Um die Betätigung der Verriegelungsvorrichtung durch einen Benutzer zu vereinfachen, ist gemäß einer weiteren Ausgestaltung vorgesehen, dass die Verriegelungsvorrichtung eine Außenhülse aufweist, dass die Außenhülse in einem Endbereich auf das Außenrohr aufgeschoben ist und dass durch axiale Verschiebung der Hülse die Freigabeposition erreicht wird. Die Verschiebung der Außenhülse als Teil der Verriegelungsvorrichtung führt folglich dazu, dass eine Bewegung der Zahnstange aus dem Eingriff mit der Zahnleiste freigegeben wird und sich die Zahnflanken der Zähne der Zahnstange an den Zahnflanken der Zähne der Zahnleiste durch die Relativkraft, die durch den Benutzer aufgebracht wird, nach oben schieben. Die Außenhülse ist vorzugsweise ringförmig geschlossen ausgestaltet und gefertigt und zur Montage in einem Endbereich auf das Außenrohr aufgeschoben und an diesem befestigt. Die Außenhülse ist dabei bewegbar, nämlich in Axialrichtung des Außenrohrs zumindest geringfügig verschiebbar, an dem Außenrohr befestigt.In order to simplify the actuation of the locking device by a user, it is provided according to a further embodiment that the locking device has an outer sleeve, that the outer sleeve is pushed onto the outer tube in an end region and that the release position is reached by axially displacing the sleeve. The displacement of the outer sleeve as part of the locking device consequently leads to the fact that a movement of the rack is released from engagement with the rack and the tooth flanks of the teeth of the rack are against the tooth flanks of the teeth of the rack due to the relative force applied by the user , slide up. The outer sleeve is preferably designed and manufactured to be closed in an annular manner and, for assembly, is pushed onto the outer tube in an end region and fastened to it. The outer sleeve is movable, namely at least slightly displaceable in the axial direction of the outer tube, attached to the outer tube.
Zum Verstellen der Länge des Staubsauger-Saugrohrs umgreift ein Benutzer beispielsweise mit einer Hand die Außenhülse am Außenrohr und verschiebt diese in Axialrichtung in die Freigabeposition, so dass die Länge des Staubsauger-Saugrohrs mit der anderen Hand durch Verschieben des Innenrohrs eingestellt werden kann. Die Ausgestaltung der Außenhülse als ringförmig geschlossenes Bauteil hat gegenüber den aus mehreren Halbschalen zusammengesetzten Hülsen den Vorteil, dass eine größere Stabilität und ein anspruchsvollerer haptischer Eindruck erzielt werden kann.To adjust the length of the vacuum cleaner suction tube, for example, a user grips the outer sleeve on the outer tube with one hand and moves it in the axial direction into the release position so that the length of the vacuum cleaner suction tube can be adjusted with the other hand by moving the inner tube. The design of the outer sleeve as a ring-shaped closed component has the advantage over the sleeves composed of several half-shells that greater stability and a more sophisticated haptic impression can be achieved.
Gemäß einer weiteren Ausgestaltung hat sich als vorteilhaft herausgestellt, wenn die Außenhülse einen Steg aufweist, dass der Steg die Wand des Außenrohrs in einer Öffnung durchgreift, und dass der Steg mit der im Außenrohr angeordneten Feder zusammenwirkt. Die Außenhülse ist bewegbar auf dem Außenrohr befestigt, wobei der Steg vorzugsweise an der zum Außenrohr gewandten Seite der Außenhülse angeordnet ist und die Wand des Außenrohrs, die dazu eine Öffnung aufweist, durchgreift. Das Ende des Stegs befindet sich folglich innerhalb des Außenrohrs. Die Feder, die vorzugsweise auch innerhalb des Außenrohrs angeordnet ist, steht beispielsweise mit dem Steg in Verbindung, so dass bei Bewegung der Außenhülse relativ zum Außenrohr die Feder durch den Steg betätigt wird und somit auch ihre Rückstellkraft in die Verriegelungsposition über den Steg auf die Außenhülse und damit auf die Verriegelungsvorrichtung ausübt wird. Der Steg ist vorzugsweise einstückig mit der Außenhülse ausgebildet.According to a further embodiment, it has been found to be advantageous if the outer sleeve has a web, that the web reaches through the wall of the outer tube in an opening, and that the web cooperates with the spring arranged in the outer tube. The outer sleeve is movably attached to the outer pipe, the web preferably being arranged on the side of the outer sleeve facing the outer pipe and reaching through the wall of the outer pipe, which has an opening for this purpose. The end of the web is consequently located inside the outer tube. The spring, which is preferably also arranged inside the outer tube, is connected, for example, to the web, so that when the outer sleeve moves relative to the outer tube, the spring is actuated by the web and thus its restoring force into the locking position via the web on the outer sleeve and thus exerted on the locking device. The web is preferably formed in one piece with the outer sleeve.
Als vorteilhaft hat sich ferner herausgestellt, wenn gemäß einer weiteren Ausgestaltung das Außenrohr in einem Endbereich erweitert ist, dass die Verriegelungsvorrichtung eine Innenhülse aufweist, und dass die Innenhülse in dem erweiterten Endbereich angeordnet ist. Das Außenrohr ist vorzugsweise mindestens in dem Endbereich erweitert, der dem Innenrohr zugewandt ist. Die Erweiterung bedeutet eine partielle oder vollständige Vergrößerung des Innen- und Außendurchmessers des Außenrohrs in einem Abschnitt im Endbereich.It has also turned out to be advantageous if, according to a further embodiment, the outer tube is widened in an end region, that the locking device has an inner sleeve, and that the inner sleeve is arranged in the widened end region. The outer tube is preferably widened at least in the end region that faces the inner tube. The enlargement means a partial or complete enlargement of the inside and outside diameter of the outer tube in a section in the end area.
Die Erweiterung entspricht vorzugsweise der Materialstärke der Innenhülse, die in diesem Endbereich angeordnet ist, so dass der Innendurchmesser der Innenhülse in etwa dem Außendurchmesser des Innenrohrs entspricht. Die Innenhülse ist vorzugsweise fest mit dem Außenrohr verbunden, so dass beispielsweise die Feder zur Rückstellung der Verriegelungsvorrichtung in die Verriegelungsposition an der Innenhülse gehalten wird. Die Innenhülse weist des Weiteren wahlweise Dichtelemente auf, die den Übergangsbereich zwischen Innenrohr und Außenrohr abdichten.The expansion preferably corresponds to the material thickness of the inner sleeve, which is arranged in this end area, so that the inner diameter of the inner sleeve corresponds approximately to the outer diameter of the inner tube. The inner sleeve is preferably firmly connected to the outer tube, so that, for example, the spring for resetting the locking device into the locking position is held on the inner sleeve. The inner sleeve also optionally has sealing elements that seal the transition area between the inner pipe and the outer pipe.
Des Weiteren ist vorgesehen, dass die Zahnstange in der Innenhülse geführt ist, beispielsweise indem die Zahnstange in einer Öffnung in der Innenhülse mit geringem Spiel geführt ist, so dass eine Bewegung der Zahnstange radial zum Staubsauger-Saugrohr möglich ist, jedoch eine Bewegung der Zahnstange - mit Ausnahme des geringen Spiels - in die anderen Raumrichtungen durch die Innenhülse verhindert wird. Die Zahnstange ist vorzugsweise in ihrer Position relativ zur Innenhülse festgelegt. Im Montagezustand befindet sich folglich die Wand des Außenrohrs mit dem erweiterten Endbereich zwischen der Innenhülse und der Außenhülse.Furthermore, it is provided that the rack is guided in the inner sleeve, for example by the rack is guided in an opening in the inner sleeve with little play, so that a movement of the rack is radial to the vacuum cleaner suction tube is possible, but a movement of the rack - with the exception of the small play - in the other spatial directions is prevented by the inner sleeve. The rack is preferably fixed in its position relative to the inner sleeve. In the assembled state, the wall of the outer tube with the enlarged end region is consequently located between the inner sleeve and the outer sleeve.
Zur Gewährleistung einer zuverlässigen Verriegelung in der Verriegelungsposition ist vorgesehen, dass die Verriegelungsvorrichtung einen Klemmsteg aufweist, dass der Klemmsteg in der Verriegelungsposition auf die den Zähnen gegenüberliegende Oberfläche der Zahnstange einwirkt, und dass der Klemmsteg in der Freigabeposition eine Bewegung der Zahnstange aus dem Eingriff mit der Zahnleiste freigibt. In der Verriegelungsposition wirkt der Klemmsteg auf die Rückseite - nämlich die den Zähnen gegenüberliegende Oberfläche der Zahnstange - ein und presst damit die Zahnstange - die Zähne der Zahnstange - in den Eingriff mit der Zahnleiste, wodurch eine Bewegung des Innenrohrs relativ zum Außenrohr verhindert wird. Der Klemmsteg übt dabei in der Verriegelungsposition beispielsweise eine Kraft auf die Zahnstange aus, die radial auf das Staubsauger-Saugrohr gerichtet ist.To ensure reliable locking in the locking position, it is provided that the locking device has a clamping bar, that the clamping bar in the locking position acts on the surface of the rack opposite the teeth, and that the clamping bar in the release position causes the rack to move out of engagement with the Toothed bar releases. In the locking position, the clamping bar acts on the rear side - namely the surface of the rack opposite the teeth - and thus presses the rack - the teeth of the rack - into engagement with the rack, which prevents movement of the inner tube relative to the outer tube. In the locking position, the clamping web exerts, for example, a force on the rack which is directed radially towards the vacuum cleaner suction tube.
In der Freigabeposition wird der Kontakt zwischen Klemmsteg und Zahnstange derart verändert, dass sich die Zahnstange von der Zahnleiste wegbewegen kann, wodurch sich die Zähne der Zahnstange mit den Zähnen der Zahnleiste nicht mehr im Eingriff befinden und eine Teleskopierung des Innenrohrs zum Außenrohr erfolgen kann. Die Beeinflussung des Klemmstegs zur Freigabe oder Verriegelung erfolgt dabei durch axiale Verschiebung zumindest eines Teils der Verriegelungsvorrichtung, vorzugsweise der Außenhülse.In the release position, the contact between the clamping bar and the rack is changed in such a way that the rack can move away from the rack, which means that the teeth of the rack are no longer in engagement with the teeth of the rack and the inner tube can be telescoped to the outer tube. The influencing of the clamping web for releasing or locking takes place by axial displacement of at least part of the locking device, preferably the outer sleeve.
Das Zusammenwirken zwischen Klemmsteg und Zahnstange wird dadurch verbessert, dass der Klemmsteg Klemmzähne aufweist, dass die Zahnstange auf der den Zähnen abgewandten Oberfläche Steuerzähne aufweist, dass in der Verriegelungsposition die Zahnspitzen der Klemmzähne auf die Steuerzähne wirken, und dass durch eine axiale Verschiebung der Verriegelungsvorrichtung der Klemmsteg relativ zur Zahnstange bewegt wird, so dass in der Freigabeposition die Klemmzähne und die Steuerzähne in Eingriff bringbar sind.The interaction between the clamping web and rack is improved in that the clamping web has clamping teeth, that the rack has control teeth on the surface facing away from the teeth, that in the locking position the tooth tips of the clamping teeth act on the control teeth, and that an axial displacement of the locking device of the Clamping web is moved relative to the rack, so that the clamping teeth and the control teeth can be brought into engagement in the release position.
In der Verriegelungsposition bewirken die Zahnspitzen der Klemmzähne, die vorzugsweise abgeflacht sind, eine Kraft auf die Steuerzähne der Zahnstange, wobei die Kraft vorzugsweise auch auf die Zahnspitzen der Steuerzähne, die vorzugsweise auch abgeflacht sind, bewirkt wird. Durch die Kraftübertragung zwischen den Klemmzähnen und den Steuerzähnen wird die Zahnstange in der Verriegelungsposition im Eingriff mit der Zahnleiste gehalten. Zur Erreichung der Freigabeposition wird der Klemmsteg relativ zur Zahnstange, vorzugsweise in Axialrichtung des Außenrohrs, bewegt, wodurch die Zahnspitzen der Klemmzähne nicht mehr auf den Zahnspitzen der Steuerzähne stehen, sondern die Klemmzähne und die Steuerzähne in Eingriff bringbar sind, wodurch eine Bewegung der Zahnstange in radialer Richtung zum Staubsauger-Saugrohr möglich ist, die etwa einer Zahnhöhe der Klemmzähne bzw. Steuerzähne entspricht.In the locking position, the tooth tips of the clamping teeth, which are preferably flattened, exert a force on the control teeth of the rack, the force preferably also being exerted on the tooth tips of the control teeth, which are preferably also flattened. The power transmission between the clamping teeth and the control teeth keeps the rack in the locked position in engagement with the rack. To reach the release position, the clamping bar is moved relative to the rack, preferably in the axial direction of the outer tube, so that the tooth tips of the clamping teeth are no longer on the tooth tips of the control teeth, but the clamping teeth and the control teeth can be brought into engagement, whereby a movement of the rack in radial direction to the vacuum cleaner suction tube is possible, which corresponds approximately to a tooth height of the clamping teeth or control teeth.
Die Klemmzähne und Steuerzähne sind vorzugsweise gleich groß und größer als die Zähne der Zahnleiste bzw. der Zahnstange. Die Bewegung der Verriegelungsvorrichtung in axialer Richtung entspricht vorzugsweise etwa der Hälfte der Breite eines Zahnfußes eines Klemmzahns bzw. eines Steuerzahns, so dass die aufeinander positionierten Zahnspitzen jeweils in das nächstliegende Tal zwischen den Steuerzähnen der Zahnstange bzw. den Klemmzähnen des Klemmstegs bewegt werden können. Die Größe der Klemmzähne bzw. der Steuerzähne ist dabei entsprechend so groß, dass die Breite eines Zahnfußes zwischen 0,5 und 15 mm liegt. Die Zahnspitzen der Klemmzähne und die Zahnspitzen der Steuerzähne sind vorzugsweise abgeflacht, so dass die abgeflachten Spitzen der Klemmzähne und der Steuerzähne vorteilhaft in der Verriegelungsposition aufeinander positioniert werden können.The clamping teeth and control teeth are preferably of the same size and larger than the teeth of the rack or the rack. The movement of the locking device in the axial direction preferably corresponds to about half the width of a tooth base of a clamping tooth or a control tooth, so that the tooth tips positioned on top of one another can be moved into the closest valley between the control teeth of the rack or the clamping teeth of the clamping web. The size of the clamping teeth or the control teeth is accordingly so large that the width of a tooth root is between 0.5 and 15 mm. The tooth tips of the clamping teeth and the tooth tips of the control teeth are preferably flattened so that the flattened tips of the clamping teeth and the control teeth can advantageously be positioned on top of one another in the locking position.
Der Klemmsteg ist als separates Bauteil ausgestaltet oder alternativ einstückig mit der Innenhülse ausgestaltet, so dass die Innenhülse die Klemmzähne aufweist. Bei separater Ausgestaltung ist der Klemmsteg in der Innenhülse angeordnet und geführt. In der Freigabeposition befinden sich die Klemmzähne des Klemmsteges und die Steuerzähne der Zahnstange zumindest temporär im Eingriff, nämlich genau dann, wenn die Zahnstange durch Abgleiten der Zähne an den Zähnen der Zahnleiste nach oben gehoben wird. Wenn die Steuerzähne mit den Klemmzähnen im Eingriff stehen, sind die Zähne der Zahnstange mit den Zähnen der Zahnleiste temporär nicht mehr im Eingriff.The clamping web is designed as a separate component or, alternatively, is designed in one piece with the inner sleeve, so that the inner sleeve has the clamping teeth. In the case of a separate configuration, the clamping web is arranged and guided in the inner sleeve. In the release position, the clamping teeth of the clamping web and the control teeth of the rack are at least temporarily in engagement, namely precisely when the rack is lifted up by sliding the teeth on the teeth of the rack. When the control teeth are in engagement with the clamping teeth, the teeth of the rack are temporarily no longer in engagement with the teeth of the rack.
Die Zahnstange ist vorzugsweise mit geringem Spiel, beispielsweise in der Innenhülse geführt, so dass in der Freigabeposition lediglich eine Bewegung in radialer Richtung zum Staubsauger-Saugrohr möglich ist, die durch den Klemmsteg bzw. die Höhe der Klemm- oder Steuerzähne begrenzt wird. Da die Höhe der Klemmzähne bzw. der Steuerzähne und damit die Bewegung der Zahnstange in radialer Richtung jedoch genauso groß oder größer ist als die Zähne der Zahnleiste bzw. der Zahnstange, ist eine Teleskopierung des Staubsauger-Saugrohrs in der Freigabeposition möglich.The rack is preferably guided with little play, for example in the inner sleeve, so that in the release position only a movement in the radial direction to the vacuum cleaner suction tube is possible, which is limited by the clamping web or the height of the clamping or control teeth. However, since the height of the clamping teeth or the control teeth and thus the movement of the rack in the radial direction is just as large or larger than the teeth of the rack or the rack, the vacuum cleaner suction tube can be telescoped in the release position.
Zur Gewährleistung einer vorteilhaften Betätigung des Staubsauger-Saugrohrs ist gemäß einer weiteren Ausgestaltung vorgesehen, dass der Klemmsteg durch den Steg der Außenhülse bewegbar ist. Der Steg der Außenhülse durchgreift die Wand des Außenrohrs, so dass sich das Ende des Stegs innerhalb des Außenrohrs befindet. Vorzugsweise ist der Steg an der Innenseite des Außenrohrs mit der Feder verbunden, so dass er mit der Feder zusammenwirkt. Die Verriegelungsvorrichtung wird durch axiale Verschiebung der Hülse auf dem Außenrohr betätigt. Dazu ist der Klemmsteg mit der Außenhülse derart verbunden, dass der Klemmsteg bei Bewegung der Außenhülse durch den Steg bewegt wird. Beispielsweise ist dazu innerhalb des Außenrohrs ein Schlitten vorgesehen, an dem der Klemmsteg angeordnet ist und der auf dem Innenrohr geführt ist, indem er es zumindest halb umgreift. Der Steg bewirkt bei einer Bewegung eine axiale Bewegung des Schlittens und damit eine Verschiebung des Klemmstegs aus der Verriegelungsposition in die Freigabeposition und umgekehrt. Die Verbindung zwischen Steg und Klemmsteg ist wahlweise auch als einfache Führung aus Kunststoff oder als Teil der Innenhülse ausgestaltet. Vorzugsweise ist der Steg der Außenhülse gleichzeitig mit der Feder und dem Klemmsteg verbunden, so dass die Feder in der Freigabeposition stets eine Rückstellung des Klemmstegs in die Verriegelungsposition hervorruft.To ensure an advantageous actuation of the vacuum cleaner suction tube, it is provided according to a further embodiment that the clamping web can be moved through the web of the outer sleeve. The web of the outer sleeve reaches through the wall of the outer tube so that the end of the web is located inside the outer tube. The web is preferably connected to the spring on the inside of the outer tube so that it interacts with the spring. The locking device is actuated by moving the sleeve axially on the outer tube. For this purpose, the clamping web is connected to the outer sleeve in such a way that the clamping web is moved through the web when the outer sleeve is moved. For example, a slide is provided within the outer tube for this purpose, on which the clamping web is arranged and which is guided on the inner tube by reaching around it at least halfway. During a movement, the web causes an axial movement of the carriage and thus a displacement of the clamping web from the locking position into the release position and vice versa. The connection between the web and the clamping web is optionally designed as a simple guide made of plastic or as part of the inner sleeve. The web of the outer sleeve is preferably connected to the spring and the clamping web at the same time, so that the spring in the release position always brings about a return of the clamping web to the locking position.
Der Steg ist folglich derart mit dem Klemmsteg verbunden, dass bei einer Verschiebung der Außenhülse in Axialrichtung der Klemmsteg in die gleiche Axialrichtung mitbewegt wird, wodurch sich die Klemmzähne des Klemmstegs relativ zu den Steuerzähnen der Zahnstange bewegen und die Freigabeposition erreicht wird. Dadurch kann die Zahnstange in radialer Richtung ausweichen und das Innenrohr und das Außenrohr können teleskopiert werden.The web is consequently connected to the clamping web in such a way that when the outer sleeve is displaced in the axial direction, the clamping web is also moved in the same axial direction, whereby the clamping teeth of the clamping web move relative to the control teeth of the rack and the release position is achieved. This allows the rack to move in the radial direction and the inner tube and the outer tube can be telescoped.
Ferner ist gemäß einer weiteren Ausgestaltung bevorzugt, wenn die Steuerzähne eine Zahnfußbreite aufweisen, die der doppelten Zahnfußbreite der Zähne entspricht. Die Hälfte der Zahnfußbreite der Steuerzähne entspricht beispielsweise etwa der Strecke, um die die Verriegelungsvorrichtung, insbesondere die Außenhülse der Verriegelungsvorrichtung, bewegt werden muss, um aus der Verriegelungsposition in die Freigabeposition zu gelangen. Daraus folgt, dass die Verriegelungsvorrichtung etwa um eine Zahnbreite der Zähne der Zahnstange bewegt werden muss, um aus der Verriegelungsposition in die Freigabeposition zu gelangen. Eine Zahnfußbreite der Zähne der Zahnstange ist auch etwa die Strecke, um die das Staubsauger-Saugrohr minimal teleskopiert werden kann.Furthermore, according to a further embodiment, it is preferred if the control teeth have a tooth root width which corresponds to twice the tooth root width of the teeth. Half of the tooth root width of the control teeth corresponds approximately to the distance by which the locking device, in particular the outer sleeve of the locking device, has to be moved in order to move from the locking position into the release position. It follows from this that the locking device has to be moved approximately by a tooth width of the teeth of the rack in order to move from the locking position into the release position. A tooth base width of the teeth of the rack is also approximately the distance by which the vacuum cleaner suction tube can be telescoped minimally.
Vorteilhaft ist die erfindungsgemäße Ausgestaltung dadurch, dass die Zahnstange zwischen fünf und fünfzehn Zähnen aufweist, insbesondere dass die Zahnstange genau acht Zähne aufweist. Eine Anzahl zwischen fünf und fünfzehn Zähnen der Zahnstange führt in der Verriegelungsposition zu einer vorteilhaften Stabilität der Verriegelung und verhindert zuverlässig, dass in der Verriegelungsposition das Außenrohr und das Innenrohr relativ zueinander verschoben werden können, beispielsweise indem Zähne abbrechen, da zwischen fünf und fünfzehn Zähnen eine ausreichende Fläche zur Kraftübertragung der Zähne zur Verfügung stellen. Insbesondere haben sich acht Zähne als besonders vorteilhaft herausgestellt.The embodiment according to the invention is advantageous in that the rack has between five and fifteen teeth, in particular that the rack has exactly eight teeth. A number between five and fifteen teeth of the rack leads to an advantageous stability of the lock in the locking position and reliably prevents the outer tube and the inner tube from being displaced relative to one another in the locking position, for example by breaking off teeth, since between five and fifteen teeth one Provide sufficient space for the teeth to transmit force. In particular, eight teeth have proven to be particularly advantageous.
Gemäß einer weiteren Ausgestaltung ist vorgesehen, wenn der Klemmsteg zwischen zwei und fünf Klemmzähnen und die Zahnstange zwischen drei und sechs Steuerzähnen aufweist, insbesondere der Klemmsteg genau drei Klemmzähne und die Zahnstange genau drei ganze und zwei halbe Steuerzähne aufweist. Die Klemmzähne und die Steuerzähne greifen lediglich in der Freigabeposition des Staubsauger-Saugrohrs temporär ineinander, nämlich wenn die Zahnstange von der Zahnleiste wegbewegt wird, indem sich die Flanken der Zähne der Zahnleiste und der Zahnstange aneinander hochschieben. Die vorgenannte Anzahl an Klemmzähnen und Steuerzähnen führt dabei zu einem zuverlässigen Zusammenwirken des Klemmstegs und der Zahnstange, ohne dass die Zahnstange beispielsweise verkantet oder instabil geführt ist. Insbesondere durch halbe Steuerzähne, die jeweils am Ende des Klemmsteges angeordnet sind, lässt sich die Zahnstange vorteilhaft führen.According to a further embodiment, it is provided that the clamping bar has between two and five clamping teeth and the rack between three and six control teeth, in particular the clamping bar has exactly three clamping teeth and the rack has exactly three whole and two half control teeth. The clamping teeth and the control teeth only interlock temporarily in the release position of the vacuum cleaner suction tube, namely when the rack is moved away from the rack, in that the flanks of the teeth of the rack and the rack slide up against one another. The aforementioned number of clamping teeth and control teeth leads to a reliable interaction of the clamping web and the rack, without the rack, for example, is tilted or unstable. The rack can be advantageously guided in particular by half control teeth which are each arranged at the end of the clamping web.
Gemäß einer letzten Ausgestaltung wird die Bedienung der Verriegelungsvorrichtung vereinfacht, indem die Verriegelungsvorrichtung in axialer Richtung in zwei Richtungen auslenkbar ist, folglich also in zwei Freigabepositionen verbringbar ist. Die axiale Bewegung der Verriegelungsvorrichtung, insbesondere der Außenhülse der Verriegelungsvorrichtung kann somit sowohl in Richtung des Innenrohrs als auch in Richtung von dem Innenrohr weg erfolgen, wobei stets eine Freigabeposition erreicht wird. Die Feder ist dabei derart vorgesehen, dass sie in beide Richtungen stets eine Rückstellkraft in die Verriegelungsposition hervorruft. Auch der Klemmsteg wird bei dieser Ausgestaltung sowohl in die eine als auch in die andere Richtung mitbewegt und ermöglicht in der Freigabeposition ein Ausweichen der Zahnstange aus dem Eingriff der Zähne der Zahnstange mit der Zahnleiste.According to a last embodiment, the operation of the locking device is simplified in that the locking device can be deflected in the axial direction in two directions, and consequently can be brought into two release positions. The axial movement of the locking device, in particular the outer sleeve of the locking device, can thus take place both in the direction of the inner tube and in the direction away from the inner tube, with a release position always being reached. The spring is provided in such a way that it always creates a restoring force in both directions into the locking position. In this embodiment, the clamping web is also moved in one direction as well as in the other direction and, in the release position, enables the rack to evade the engagement of the rack teeth with the rack.
Im Einzelnen gibt es nun eine Vielzahl von Möglichkeiten das Staubsauger-Saugrohr auszugestalten und weiterzubilden. Dazu wird verwiesen sowohl auf die dem Patentanspruch 1 nachgeordneten Patentansprüche als auch auf die nachfolgende Beschreibung von bevorzugten Ausführungsbeispielen in Verbindung mit der Zeichnung. In der Zeichnung zeigen:
- Fig. 1
- ein Ausführungsbeispiel eines Staubsauger-Saugrohrs mit Verriegelungsvorrichtung in geschnittener Seitenansicht,
- Fig. 2
- ein Ausführungsbeispiel eines Staubsauger-Saugrohrs mit Verriegelungsvorrichtung in geschnittener Seitenansicht,
- Fig. 3
- ein Ausführungsbeispiel eines Staubsauger-Saugrohrs in perspektivischer Ansicht.
- Fig. 1
- an embodiment of a vacuum cleaner suction tube with locking device in a sectional side view,
- Fig. 2
- an embodiment of a vacuum cleaner suction tube with locking device in a sectional side view,
- Fig. 3
- an embodiment of a vacuum cleaner suction tube in a perspective view.
In der Freigabeposition ist die Zahnstange 6 derart frei beweglich, dass sie ohne den Einfluss einer Federkraft aus dem Eingriff mit der Zahnleiste 5 zurückdrückbar ist, wodurch das Innenrohr 2 und das Außenrohr 3 durch eine Relativkraft, die durch einen Benutzer aufgebracht wird, zueinander verschiebbar sind. Dabei wird die Zahnstange 6 aus dem Eingriff mit der Zahnleiste 5 nach oben gedrückt, indem die Zahnflanken der Zähne der Zahnstange 6 an den Zähnen der Zahnleiste 5 abgleiten. Die Verriegelungsvorrichtung 4 weist eine Feder 7 auf, die bei Auslenkung der Verriegelungsvorrichtung 4 aus der Verriegelungsposition in die Freigabeposition eine Kraft hervorruft, die die Verriegelungsvorrichtung 4 in die Verriegelungsposition zurückstellt. Im unbetätigten Zustand befindet sich die Verriegelungsvorrichtung 4 somit stets in der Verriegelungsposition. Zur Erreichung der Freigabeposition weist die Verriegelungsvorrichtung 4 eine Außenhülse 8 auf, die in Achsrichtung des Außenrohrs 3 relativ zum Außenrohr 3 verschiebbar auf diesem gehalten wird. Die Außenhülse 8 ist in
Die Außenhülse 8 ist in dem Endbereich des Außenrohrs 3 auf dieses aufgeschoben und mit dem Außenrohr 3 verbunden. Die Außenhülse 8 weist einen Steg 9 auf, der die Wand des Außenrohrs in einer Öffnung 10 durchgreift, so dass der Steg 9 mit der im Außenrohr 3 angeordneten Feder 7 zusammenwirkt. Wird die Außenhülse 8 gemäß
Die Verriegelungsvorrichtung 4 weist des Weiteren einen Klemmsteg 12 auf, der mit Klemmzähnen 13 auf Steuerzähne 14 der Zahnstange 6 derart einwirkt, dass in der Verriegelungsposition die Zähne der Zahnstange 6 in Eingriff mit der Zahnleiste 5 gehalten werden. Die Steuerzähne 14 sind auf der den Zähnen der Zahnstange 6 gegenüberliegenden Oberfläche angeordnet. Die Zahnspitzen der Klemmzähne 13 und die Zahnspitzen der Steuerzähne 14 sind bei diesem Ausführungsbeispiel abgeflacht und stehen in der Verriegelungsposition miteinander in Kontakt.The
Der Steg 9 der Außenhülse 8 steht mit dem Klemmsteg 12 derart in Verbindung, dass wenn die Außenhülse 8 in eine Richtung - gemäß
In
Gemäß
Claims (9)
- A vacuum cleaner suction tube (1) comprising at least one inner tube (2), at least one outer tube (3), and at least one locking device (4), wherein the inner tube (2) comprises a toothed strip (5) with teeth, wherein the locking device (4) is attached to the outer tube (3), wherein the locking device (4) is manually movable from a locking position to a release position by a user, wherein the locking device (4) comprises a toothed rack (6) with teeth, and wherein, in the locking position, the toothed rack (6) is held in engagement with the toothed strip (5) of the inner tube (2), thereby fixing the position of the inner tube (2) relative to the outer tube (3),wherein the locking device (4) can be brought into the release position by displacement relative to the outer tube (3) and in the axial direction of the outer tube (3), wherein the toothed rack (6) in the release position can be pushed out of engagement with the toothed rack (5) by a relative force between the outer tube (3) and the inner tube (2) without the influence of a spring force, in that the tooth flanks of the teeth of the toothed strip (5) push the tooth flanks of the teeth of the toothed toothed rack (6) upwards, wherein the inner tube (2) is displaceable relative to the outer tube (3), wherein the locking device (4) has a clamping bridge (12), wherein the clamping bridge (12) in the locking position acts on the surface of the toothed rack (6) opposite the teeth, and wherein the clamping bridge (12) in the release position releases movement of the toothed rack (6) from engagement with the toothed strip (5), wherein the clamping bridge (12) has clamping teeth (13), that the toothed rack (6) has control teeth (14) on the surface facing away from the teeth, wherein in the locking position the tooth tips of the clamping teeth (13) act on the tooth tips of the control teeth (14), and in that an axial displacement of the locking device (4) moves the clamping bridge (12) relative to the toothed rack (6) so that in the release position the clamping tooth (13) and the control tooth (14) can be brought into engagement,
characterized in
that the toothed rack (6) has between five and fifteen teeth, in particular that the toothed rack (6) has exactly eight teeth. - Vacuum cleaner suction tube (1) according to claim 1, characterized in that the locking device (4) comprises a spring (7), and that the spring (7), upon deflection of the locking device (4) from the locking position, causes a force with which the locking device (4) can be returned to the locking position.
- Vacuum cleaner suction tube (1) according to claim 1 or 2, characterized in that the locking device (4) has an outer sleeve (8), that the outer sleeve (8) is pushed onto the outer tube (3) in an end region, and that the release position is reached by axial displacement of the outer sleeve (8).
- Vacuum cleaner suction tube (1) according to claim 3, characterized in that the outer sleeve (8) has a bridge (9), that the bridge (9) passes through the wall of the outer tube (3) in an opening (10), and that the bridge (9) interacts with the spring (7) arranged in the outer tube (3).
- Vacuum cleaner suction tube (1) according to any one of claims 1 to 4, characterized in that the outer tube (3) is widened in one end region, that the locking device (4) has an inner sleeve (11), and that the inner sleeve (11) is arranged in the widened end region.
- Vacuum cleaner suction tube (1) according to any one of claims 1 to 5, characterized in that the clamping bridge (12) is movable through the bridge (9) of the outer sleeve (8).
- Vacuum cleaner suction tube (1) according to claim 5 or 6, characterized in that the control teeth (14) have a tooth base width which corresponds to twice the tooth base width of the teeth of the toothed rack (6).
- Vacuum cleaner suction tube (1) according to any one of claims 1 to 7, characterized in that the clamping bridge (12) has between two and five clamping teeth (13) and the toothed rack (6) has between three and six control teeth (14), in particular the clamping bridge (12) has exactly three clamping teeth (13) and the toothed rack (6) has exactly three whole and two half control teeth (14).
- Vacuum cleaner suction tube (1) according to any one of the claims 1 to 8, characterized in that the locking device (4) is deflectable in two directions in the axial direction, thus being movable into two release positions.
Applications Claiming Priority (1)
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DE102011121350 | 2011-12-19 |
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DE20103442U1 (en) * | 2001-02-28 | 2001-08-23 | Kwang Dong Prec Co | Device for adjusting the length of a suction pipe of a vacuum cleaner |
CN2495251Y (en) * | 2001-08-07 | 2002-06-19 | 广东美的集团股份有限公司 | Telescopic pipe of suction cleaner |
WO2004049891A1 (en) * | 2002-12-04 | 2004-06-17 | Ismail Yakici | Locking mechanism of interconnected extension pipe for the vacuum cleaner |
WO2005082222A1 (en) * | 2004-02-26 | 2005-09-09 | Eunsung Electronics Co., Ltd | Apparatus for controlling the length and articles using the same |
US7334503B1 (en) * | 2006-09-05 | 2008-02-26 | Newman Frederick M | Tool for changing a light bulb |
DE102006061520B4 (en) * | 2006-12-21 | 2011-10-27 | Fischer Rohrtechnik Gmbh | Telescopic pipe connection for vacuum cleaner suction pipes or tripods |
-
2012
- 2012-12-12 EP EP12196793.9A patent/EP2606801B1/en active Active
- 2012-12-13 DE DE102012024351A patent/DE102012024351A1/en not_active Withdrawn
- 2012-12-19 US US13/719,268 patent/US9351621B2/en active Active
- 2012-12-19 CN CN201210599461.6A patent/CN103340588B/en active Active
Non-Patent Citations (1)
Title |
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None * |
Also Published As
Publication number | Publication date |
---|---|
DE102012024351A1 (en) | 2013-06-20 |
CN103340588A (en) | 2013-10-09 |
EP2606801A3 (en) | 2017-03-22 |
US9351621B2 (en) | 2016-05-31 |
EP2606801A2 (en) | 2013-06-26 |
US20130175794A1 (en) | 2013-07-11 |
CN103340588B (en) | 2017-09-08 |
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