EP2799189B1 - Mécanisme de blocage pour une tige télescopique - Google Patents

Mécanisme de blocage pour une tige télescopique Download PDF

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Publication number
EP2799189B1
EP2799189B1 EP13166419.5A EP13166419A EP2799189B1 EP 2799189 B1 EP2799189 B1 EP 2799189B1 EP 13166419 A EP13166419 A EP 13166419A EP 2799189 B1 EP2799189 B1 EP 2799189B1
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EP
European Patent Office
Prior art keywords
clamping
clamping part
fastening mechanism
telescopic handle
tube
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP13166419.5A
Other languages
German (de)
English (en)
Other versions
EP2799189A1 (fr
Inventor
Klaus-Jürgen Fischer
Detlef Zens
Thorsten May
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.)
Leifheit AG
Original Assignee
Leifheit AG
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 Leifheit AG filed Critical Leifheit AG
Priority to PL13166419T priority Critical patent/PL2799189T3/pl
Priority to EP13166419.5A priority patent/EP2799189B1/fr
Priority to ES13166419.5T priority patent/ES2616530T3/es
Priority to CN201420222368.8U priority patent/CN204061446U/zh
Publication of EP2799189A1 publication Critical patent/EP2799189A1/fr
Application granted granted Critical
Publication of EP2799189B1 publication Critical patent/EP2799189B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25G—HANDLES FOR HAND IMPLEMENTS
    • B25G1/00—Handle constructions
    • B25G1/04—Handle constructions telescopic; extensible; sectional

Definitions

  • the invention relates to a locking mechanism for an inner tube and an outer tube having telescopic handle, in particular for a telescopic handle for household or garden tools, with an outer part, an inner part and at least one clamping part, wherein the outer part and the inner part relative to each other in the axial direction in a clamping direction K and in one of the clamping direction K opposite release direction L are displaceable, being pressed by a displacement in the clamping direction K, the clamping member against the telescopic handle to determine the inner tube and the outer tube against each other via a clamping force, and wherein by a shift in the release direction L, the clamping is solved to produce a displacement and / or rotation of the inner tube and the outer tube to each other.
  • Such a locking mechanism or a telescopic handle with such a locking mechanism is from the EP 2 255 712 A1 known.
  • a displaceable relative to an inner sleeve in the axial direction outer sleeve is displaced in a clamping direction relative to the inner sleeve, whereby a clamping portion of the inner sleeve is made against the telescopic handle to set the two tubes of the telescopic handle against each other.
  • the material of the jaw pair can not be a material such as soft plastic, which has a particularly high coefficient of friction, since such a material would further hinder the movement of the inner tube on the jaw pair past or even sticking of the jaw pair on the inner tube possible would be, for example, after prolonged disuse of the telescopic handle.
  • An initially mentioned telescopic handle also discloses the publication DE 36 25 287 A1 ,
  • the displacement of the outer tube and inner tube is prevented by the fact that provided on the inner part against the inner tube tongue are provided with inwardly directed projections which cooperate with depressions in the inner tube, so that in a displacement of outer part to inner part in the release direction no free Displaceability of the inner and outer tube is made.
  • the hinge attachment in cases in which one presses the clamping force by further narrowing of the clamping point for clamping, by means of which the clamping jaws are pressed onto the pipe to be determined or braked increases (useful, for example, to increase the clamping force. or braking force), the hinge attachment as a result of the further narrowing increased, acting on the hinge attachment tensile force can also fail.
  • Clamping mechanisms of the type mentioned are also in the publications US 4,277,197 . US 2011/02774481 A1 . US 5,983,455 . US 2012/0155950 A1 and US 4,524,484 disclosed.
  • the clamping parts are here each designed as clamping cheeks material integral with the inner part, so that even in these embodiments, the disadvantages described above.
  • the object of the invention is therefore to provide a locking mechanism of the type described above, which allows an improved clamping or braking action, in particular an increased clamping or braking force, while minimizing the risk of failure of the locking mechanism. Furthermore, the locking mechanism should ensure the complete release of the clamping in order to ensure a possible unhindered movement of the telescopic handle tubes against each other.
  • This object is achieved according to the invention in that on the locking mechanism acting in the circumferential direction on the clamping part support is provided which is capable of supporting a force acting in the circumferential direction on the clamping part load, and / or that the locking mechanism acting in the axial direction on the clamping part support is provided, which is able to support a force acting in the axial direction on the clamping part load.
  • the at least one clamping part additionally receives support in the circumferential direction and / or in the axial direction, forces acting on the clamping part can be intercepted much better and more reliably and introduced into the adjacent components.
  • the support of the braking forces on adjacent components is no longer via a hinge or a similar failure-prone attachment or at least not alone on this, but directly on the Housing structure of the component that forms the support.
  • the support acting in the circumferential direction is arranged in the axial direction in an advantageous manner in the amount of acting on the (inner or outer) tube of the telescopic handle clamping surface of the clamping member and thus holds a possibly axially offset from the clamping surface arranged additional attachment of the clamping part Braking a rotating tube of the telescopic handle free of bending moments.
  • the described type of additional support is particularly important for a clamping part of meaning that is a separate component from the inner and outer part and so cooperates with the inner part or outer part, that it can be free in the radial direction of the outer or inner tube, if the locking mechanism is in the release position without the radially directed away from the telescopic handle tube movement associated with a deflection of the inner part or the outer part.
  • the clamping part is not supported by the inner or the outer part not already in the circumferential direction and / or in the axial direction, because it is for example an integral part of the inner or outer part.
  • the support via the inner part, which in turn rotatably preferably on the (outer or inner) tube of the telescopic handle is supported.
  • the support can also be done via the outer part.
  • the at least one clamping part is received in a recess of the locking mechanism, in particular in a shaft-like recess in the inner part of the locking mechanism or an inside, groove-like recess in the outer part, wherein the body edges or surface areas of the recess adjacent to the clamping part in the circumferential direction Form support, which are able to support the clamping part in the circumferential direction.
  • the body edges adjacent in the axial direction to the clamping part or Surface regions of the recess form the support.
  • the clamping part is loosely inserted as a loose part in the recess.
  • the recess forms a shaft in the inner part of the clamping mechanism, in which the recess surrounds the clamping part completely.
  • the clamping member with an inside, that is on the side facing the tube to a telescopic handle side of the outer part cooperate with the outer part, for example, in which a survey on the clamping part or the clamping member as a whole engages in a groove-like depression on the outer part or in the a radially inwardly projecting extension acts on the clamping part.
  • the at least one clamping part via an additional attachment in particular via a hinge or hinge, on the locking mechanism, in particular on the inner part or on the outer part, is articulated.
  • the clamping part can be regarded as a separate component from the inner part and outer part, since the clamping part also move independently of the inner part or outer part in the radial direction, albeit in a directed around the rotary joint or hinge axis movement, the free mobility in the radial direction but limited for the application described here to a negligible extent.
  • the result of this embodiment is that the at least one clamping part during braking of a rotating part of the telescopic handle no longer has to support braking torque alone on a rather failure-susceptible mounting, but the braking or pulling forces acting on the clamping part when transferring the locking mechanism in the clamping position, can be intercepted directly via the support on the inner or outer part.
  • a support which also acts in the axial direction for example a surrounding recess which surrounds the clamping part, is possible such a favorable introduction of force from the clamping part on the support forming adjacent component, that the pressure of the at least one clamping member on the tube of the telescopic handle on which the clamping member acts, by narrowing the bottleneck responsible for the clamping force despite the concomitant to the clamping part acting tensile force can be interpreted very high, without causing the high tensile forces in a displacement of the inner part relative to the outer part in the clamping direction to a failure of the locking mechanism.
  • a the clamping part of the (outer or inner) tube of the telescopic handle wegdrlindendes expansion member so as to ensure that the clamping member, when the outer and inner parts are moved in the release direction against each other, is actively moved away from the telescopic handle.
  • a spreading member exerts an expanding force on the clamping part, which actively ensures that the clamping surface of the clamping part lying in clamping position against the surface of the telescopic handle is urged away from the telescopic handle surface in the radial direction. This reliably ensures that in the release position, the clamping surface of the clamping part and the surface of the telescopic handle are spaced apart and also - as long as the release position is maintained - be maintained.
  • the inner tube can be rotated and displaced so freely and unaffected by the clamping part relative to the clamping part.
  • the spreading members active ie by exerting an expanding force on the clamping part, move away from the telescopic handle, a material is used on the inside of the clamping member, a material ensures that ensures a very high coefficient of friction.
  • a soft plastic may be provided on the inside of the clamping part, while on the outside of the clamping part, over which, as will be explained below, the sliding part of the locking mechanism slides away, a harder plastic with a low friction value can be used than on the inside.
  • the spreading members are preferably designed as bending springs, such as wire or leaf springs, which act on the clamping part and are supported on the outer or inner part. They are biased so that they then move the clamping part, when the locking mechanism is in the release position, from the telescopic tube.
  • spreading members which move in the axial direction on the clamping part, when inner part and outer part are moved in the release direction relative to each other.
  • the spreading members can either push under the clamping part and this by an inclined plane radially outward, ie away from the surface of the telescopic handle, lift. Or they can penetrate into one or more axially or circumferentially extending gaps and thus actively move away the at least one clamping part from the pipe surface in the radial direction.
  • the inner part is firmly and immovably connected to the telescopic handle and the outer part can move largely free of play on the inner part.
  • the outer part may be formed as a tubular outer sleeve and the inner part as an integral with the telescopic handle inner sleeve, wherein the inner diameter of the outer sleeve is adapted to the outer diameter of the inner sleeve, that the outer sleeve can be easily, but largely free of play over the inner sleeve.
  • a locking mechanism mounted on the actuating member is provided, via the actuation of the inner part and the outer part can be moved relative to each other.
  • the actuator may be pivotable about a pivot axis fixedly defined in its spatial position either to the inner part or to the outer part.
  • a pivot axis mounted cam which acts upon pivoting of the actuator to the other part to move this, the outer part and inner part are then moved relative to each other in the axial direction of the telescopic handle.
  • the pivot axis is v orthogonal to the axially extending Aligned center axis of the telescopic handle.
  • a pivot lever is provided.
  • the actuating member may have a first (male or female) detent member which cooperates with a second detent member (female or male) corresponding to the first detent member to hold the actuator in the clamping position.
  • a telescopic handle 1 is shown in an overall view.
  • the telescopic handle 1 is constructed in several parts and, in addition to an upper outer tube 2, a lower inner tube 3, which can slide into the outer tube 3 in order to vary the length of the telescopic handle 1.
  • a holder 4 is provided for a work attachment, not shown.
  • Such a work attachment may in particular be formed by a mop head, a dust catcher, a broom, a window wiper or similar work attachments that can be used in the home or garden.
  • Outer tube 2 and inner tube 3 can optionally be braced against each other to prevent relative mobility with respect to the other part, or be detached from each other to produce the relative mobility (displacement and / or rotation).
  • a locking device is provided with a locking mechanism 5.
  • the in FIG. 1 shown telescopic handle 1 also has an optional feature an internal drive unit 6, which ensures that after loosening the locking device and when sliding in the inner tube 3 in the outer tube 2, the inner tube 3 is rotated relative to the outer tube 2 in rotation, which, for example, the ejection of a can serve on the holder 4 mounted wiping head of a wiper device.
  • an internal drive unit 6 which ensures that after loosening the locking device and when sliding in the inner tube 3 in the outer tube 2, the inner tube 3 is rotated relative to the outer tube 2 in rotation, which, for example, the ejection of a can serve on the holder 4 mounted wiping head of a wiper device.
  • the locking mechanism according to the invention can also be used with telescopic handles without such a drive unit.
  • the telescopic handle 1 is always described by way of example in connection with an upper outer tube 2 and a lower inner tube 3, it should be noted that, of course, the outer tube below and the inner tube can be arranged above. Any components of a drive unit 6 or the locking device 5 and the position of the components would be adapted in this case to the other structure.
  • FIG. 2a and 2b show the locking device in a schematized external view, wherein in FIG. 2a the locking device 5 is shown in clamping position, in the inner tube 3 and outer tube 2 are not movable relative to each other, and in FIG. 2b the locking device 5 is shown in the release position, in which the clamping mechanism is released and inner tube 3 and outer tube 2 are movable relative to each other.
  • an actuating member in the form of a pivot lever 7 is provided in order to change between the clamping position and the release position.
  • the pivot lever 7 is defined via a pivot axis S against an inner part 8 pivotally defined.
  • the rocker lever 7 engages with two bearing journals in the inner part 8.
  • an outwardly directed sliding cam 10 is provided on the pivoting lever 7, which is arranged eccentrically to the pivot axis S and which is engaged by engagement in a provided in an outer part 11 of the locking device 5 groove 12 with the outer part 11 in operative connection.
  • cover sleeve 13 On an end face of the outer part of a cover sleeve 13 is placed and connected to it in such a way that the cover sleeve 13 engages over the inner part in the axial direction and covers optically.
  • clamping parts which is formed from here by way of example of two radially opposite and evenly distributed over the circumference jaws 15 (from the figures, only one jaw is visible, which is also shown in the drawing in section).
  • clamping parts are not necessarily exactly two clamping parts must be provided. In certain cases, a single clamping part may be sufficient or more than two clamping parts may be used.
  • the clamping parts 15 are in the form of loose parts in a recess 9 provided in a component of the locking mechanism (here, for example, in a shaft-like recess provided in the inner part 8) and are peripherally surrounded in their entirety by this recess 9.
  • the clamping parts can move independently of the inner part and outer part in the radial direction freely.
  • the lateral body edges or surface areas of the recess 9, which are adjacent to the clamping parts 15, form a support on which forces acting on the clamping parts 15 are supported by the inner tube 3 of the telescopic handle and intercepted by the inner part 8.
  • the inner part 8 is fully closed at its downwardly facing end face.
  • the forces acting on the clamping part in the circumferential direction are supported by the lateral edges 23 recess 9.
  • FIG. 3a and 3b also illustrate the clamping function.
  • FIG. 3b It can be seen that the inner diameter of the outer part 11 in the area in which the clamping parts 15 are located, starting from the end-face, the lower end of a first diameter section 16 with the diameter d 1 to a second diameter section 17 with the diameter d 2 tapered (d 1 > d 2 ).
  • a clamping cone 24 is provided on the outer part on the inside.
  • the outer part 11 is close to its inner wall Clamping part 15, so that the pointing to the telescopic handle clamping surface of the clamping member 15 is made on the resulting clamping force against the telescopic handle tube and the desired clamping effect occurs.
  • FIG. 3b shows the locking mechanism in release position.
  • the contact point 18 is now in the first diameter region 16 with the diameter d 1 , so that the inner wall of the outer part 11 is radially spaced from the contact point 18 and from the circumferentially extending elevation on the outside of the clamping member and the jaws, without a counterforce would occur, can remove the suspension of the clamping effect to the outside of the inner tube surface.
  • the clamping member 15 is formed such that it at the the telescopic handle surface facing inside has a soft plastic, which ensures a high friction value.
  • a material is advantageous which ensures a low coefficient of friction.
  • the inner part 8 is fixedly arranged on the outer tube 2 of the telescopic handle.
  • the inner tube 3 of the telescopic handle is guided within the outer tube 2 and thus also within the inner part 8.
  • the pivot lever 10 engages in the inner part 8 to form a defined pivot axis S and the eccentric sliding cam 10 with a groove 12 in the outer part 11 is engaged
  • the outer part is firmly connected to the telescopic handle and the inner part is moved.
  • the pivot lever engages in the outer part to form a defined pivot axis and the sliding cam or a comparable component acts on the inner part.
  • the clamping part is not necessarily embed the inner part, but can - depending on the structural requirements of the case - be articulated on the outer part.
  • the number of clamping pieces or jaws can of course be varied and is not limited to the above-mentioned number of a single clamping part or of only two jaws.
  • Figure 3a and 3b an alternative embodiment in which the example designed as a pivot lever 7 actuator projecting the outer part 11 in the axial direction beyond the upper end face 20 of the outer part. This has the advantage that the actuator can be particularly easily grasped.
  • Figure 4a and Figure 4b acting between the actuator 7 and another component of the locking mechanism, releasable by hand latching connection 21 which holds the actuator in the clamping position and counteracts an accidental adjustment of the locking mechanism in the release direction L by a manually bridged locking resistor.
  • a male detent member 21 ' is provided on the outer member 11 and a female detent member 21 "is provided on the actuating member 7.
  • the female detent member 21" is formed by an edge-side recess on the actuating member 7 formed as a pivoting lever into which the male corresponding to the outer member 8 is inserted Detent member 21 'engages when the pivot lever 7 is in the clamping position.
  • Figure 4a and Figure 4b an embodiment in which the latching connection 21 is provided via a male locking member 21 'on the actuating member 7 and a female locking member 21 "on the inner part 8.
  • the male locking member 21' extends in the clamping position of the inside of the pivot lever 7 in radial direction on the inner part 8, penetrates the female locking member 21 "and engages behind with a locking projection, the inner part. 8

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
  • Clamps And Clips (AREA)

Claims (9)

  1. Mécanisme d'immobilisation (5) pour tige télescopique (1) présentant un tube interne (3) et un tube externe (2), avec une pièce externe (11), une pièce interne (8) et au moins une pièce de serrage (15), où la pièce externe (11) et la pièce interne (8) sont mobiles l'une par rapport à l'autre dans une direction de serrage K et dans une direction de libération L opposée à la direction de serrage K, où la pièce de serrage (15) est comprimée contre la tige télescopique (1) sous l'effet d'un déplacement dans la direction de serrage K pour immobiliser le tube interne (3) et le tube externe (2) en exerçant une force de serrage et où le serrage est libéré sous l'effet d'un déplacement dans la direction de libération L, pour permettre le déplacement et/ou la rotation du tube interne (3) et du tube externe (2), où un support agissant dans le sens de la circonférence U sur la pièce de serrage (15) est prévu au niveau du mécanisme d'immobilisation (5), support permettant de supporter une contrainte appliquée à la pièce de serrage (15) dans le sens de la circonférence U et/ou un support agissant dans le sens axial A sur la pièce de serrage (15) est prévu au niveau du mécanisme d'immobilisation (5), support permettant de supporter une contrainte appliquée à la pièce de serrage (15) dans le sens axial U, caractérisé en ce qu'un évidement (9) est prévu dans la pièce interne (8) ou dans la pièce externe (11), évidement recevant la pièce de serrage, et le support est constitué au-dessus des côtés de l'évidement jouxtant la pièce de serrage (15).
  2. Mécanisme d'immobilisation selon la revendication 1, caractérisée en ce que le support agissant dans le sens de la circonférence est disposé, vu dans le sens axial A, à la hauteur de la surface de serrage de la pièce de serrage (15) agissant sur la tige télescopique (1).
  3. Mécanisme d'immobilisation selon l'une quelconque des revendications précédentes, caractérisé en ce que la pièce de serrage (15) est un composant séparé de la pièce interne (8) et de la pièce externe (11), composant libre de ses mouvements par rapport à la tige télescopique dans le sens radial R indépendamment de la pièce interne (8) ou de la pièce externe (11).
  4. Mécanisme d'immobilisation selon l'une quelconque des revendications précédentes, caractérisé en ce que ladite au moins pièce de serrage (15) est logée dans un évidement (9) dans la pièce interne (8) ou la pièce externe (11).
  5. Mécanisme d'immobilisation selon l'une quelconque des revendications précédentes, caractérisé en ce que la pièce de serrage (15) est logée dans l'évidement (9) comme pièce libre de ses mouvements.
  6. Mécanisme d'immobilisation selon l'une quelconque des revendications précédentes, caractérisé en ce qu'un évidement (9) est constitué comme fosse d'insertion pour la pièce de serrage (15) dans un composant du mécanisme de serrage (5).
  7. Mécanisme d'immobilisation selon l'une quelconque des revendications précédentes, caractérisé en ce que l'évidement (9) entoure la pièce de serrage (15) sur toute sa circonférence.
  8. Mécanisme d'immobilisation selon l'une quelconque des revendications précédentes, caractérisé en ce qu'un élément d'écartement repoussant la pièce de serrage à partir du tube externe (2) ou du tube interne (3) est prévu, élément agissant sur ladite au moins une pièce de serrage (15) pour repousser la pièce de serrage (15) partir du tube externe (2) ou du tube interne (3), lorsque la pièce externe (11) et la pièce interne (8) sont déplacées l'une par rapport à l'autre dans le sens de libération L.
  9. Mécanisme d'immobilisation selon l'une quelconque des revendications précédentes, caractérisé en ce qu'une liaison par encliquetage (21) est prévue pour retenir le mécanisme d'immobilisation (5) dans la position de serrage et s'opposer à un décalage dans le sens de libération L provoqué par une résistance d'encliquetage.
EP13166419.5A 2013-05-03 2013-05-03 Mécanisme de blocage pour une tige télescopique Active EP2799189B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
PL13166419T PL2799189T3 (pl) 2013-05-03 2013-05-03 Unieruchamiający mechanizm dla teleskopowego uchwytu
EP13166419.5A EP2799189B1 (fr) 2013-05-03 2013-05-03 Mécanisme de blocage pour une tige télescopique
ES13166419.5T ES2616530T3 (es) 2013-05-03 2013-05-03 Mecanismo de bloqueo para un brazo telescópico
CN201420222368.8U CN204061446U (zh) 2013-05-03 2014-04-30 用于伸缩杆的定位机构

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13166419.5A EP2799189B1 (fr) 2013-05-03 2013-05-03 Mécanisme de blocage pour une tige télescopique

Publications (2)

Publication Number Publication Date
EP2799189A1 EP2799189A1 (fr) 2014-11-05
EP2799189B1 true EP2799189B1 (fr) 2017-02-01

Family

ID=48288870

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13166419.5A Active EP2799189B1 (fr) 2013-05-03 2013-05-03 Mécanisme de blocage pour une tige télescopique

Country Status (4)

Country Link
EP (1) EP2799189B1 (fr)
CN (1) CN204061446U (fr)
ES (1) ES2616530T3 (fr)
PL (1) PL2799189T3 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11698092B2 (en) 2020-06-22 2023-07-11 Unger Marketing International Telescopic pole for a cleaning implement

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4277197A (en) * 1980-01-14 1981-07-07 Kearney-National, Inc. Telescoping tool and coupling means therefor
US4524484A (en) * 1983-06-15 1985-06-25 Swiss-Tex, Incorporated Extension handle having cooperating male and female locking sleeves
DE3625287A1 (de) 1986-07-25 1988-02-04 Gardena Kress & Kastner Gmbh Teleskopstiel
US5983455A (en) * 1997-06-19 1999-11-16 Newell Operating Company Multi-faceted extension pole
TWM368410U (en) 2009-05-27 2009-11-11 Tuo Dih Shen Internat Corp Mop converting vertically linear displacement into uni-directional dehydration
US8522387B2 (en) * 2009-07-01 2013-09-03 Tuo Shen International Corporation Limited Swiveling locking mechanism of a telescopic rod of a mop
US8851784B2 (en) * 2010-12-16 2014-10-07 James K. Donohue System of an extension pole

Non-Patent Citations (1)

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

Also Published As

Publication number Publication date
CN204061446U (zh) 2014-12-31
ES2616530T3 (es) 2017-06-13
EP2799189A1 (fr) 2014-11-05
PL2799189T3 (pl) 2017-06-30

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