EP3232889A1

EP3232889A1 - Suction hose connecting piece

Info

Publication number: EP3232889A1
Application number: EP15810669.0A
Authority: EP
Inventors: Michael Majer
Original assignee: Festool GmbH
Current assignee: Festool GmbH
Priority date: 2014-12-19
Filing date: 2015-12-17
Publication date: 2017-10-25
Anticipated expiration: 2035-12-17
Also published as: DK3232889T3; EP3232889B1; DE112015005649A5; CN107427172A; DE102014119243A1; CN107427172B; WO2016097105A1

Abstract

The invention relates to a suction hose connecting piece (10) for a suction hose (100) for producing a flow connection, particularly from a machine tool to a vacuum cleaner, said connecting piece (10) having a tubular body (11) with a circumferential wall that delimits a flow channel, and a plug section (50) that is arranged on said tubular body (11) for the purpose of producing a plug connection with a mating connecting piece, it being possible to plug said connecting piece (10) and mating connecting piece one onto the other, and said plug section (50) consisting of a material that is elastically more yielding than the tubular body (11). According to the invention, at least one rotational form-fit contour (70) is arranged on the plug section (50) in order to produce a form-fit connection with a rotational form-fit mating contour of said mating connecting piece, at least one rotational form-fit contour (70) being able to be brought into or out of engagement with said rotational form-fit mating contour by means of a relative rotational movement of said connecting piece (10) and mating connecting piece, about a longitudinal axis (L) of the plug section (50).

Description

Suction hose fitting

The invention relates to a suction hose connecting piece for a suction hose for producing a flow connection, in particular from a machine tool to a vacuum cleaner, wherein the connecting piece has a tubular body with a peripheral wall defining a flow channel and a plug portion arranged on the tubular body for producing a plug connection with a connection counterpart wherein the connecting piece and the connecting counterpart can be attached to one another, wherein the plug-in portion consists of a more resilient material than the tubular body.

The suction hose connecting piece can be inserted with its plug portion, for example, in a connection sleeve or another suction hose connection of a hand-held machine tool. The connector yields, so that it is for example frictionally received in or on the suction hose connection of the hand-held machine tool. However, the hold in the pulling or plugging direction is limited by the frictional engagement, which is why the suction hose during operation of the hand-held machine tool, such as sawing along a guide rail, can be solved relatively easily. This is uncomfortable for the operator and disturbs the operation.

It is therefore the object of the present invention to provide an improved suction hose fitting.

To solve the problem is provided in a suction hose connector of the type mentioned that at the plug portion at least one

Drehformschlusskontur for producing a positive connection with a ner Drehformschlussgegenkontur of the connection counterpart is arranged, wherein at least one rotational locking contour with the Drehformschlussgegenkontur by a relative rotational movement of the connecting piece and the connection counterpart about a longitudinal axis of the plug portion is engageable or disengageable.

It is a basic idea that an improved hold of the connection counterpart is ensured by the arranged on the relatively soft plug-in section Drehformschlusskonturen or at least one rotational mold clamping contour.

The plug-in section, for example, yields elastically so that it can be plugged onto the connection counterpart, for example. The plug-in section plugged onto the connection counterpart clings, as it were, the connection counterpart, so that a rotation is hindered or made more difficult. Thus, the Drehformschlusskonturen and Drehformschlussgegenkonturen optimally engaged so that the connector and the port counterpart hold together well. Likewise, this principle works when the plug-in portion is plugged into a socket of the connection counterpart and thus something is compressed. The male portion tends to expand so that it can be relatively difficult to twist in the female connector.

As a result, the Drehformschlusskonturen and Drehformschlussgegenkonturen remain optimally engaged.

A further aspect is that a relatively soft material, of which the plug-in portion consists or which has the plug-in portion, as a rule has a higher friction than a hard material. The friction also counteracts unintentional release of the rotational mold closure.

The rotational form-locking contours can be rotary-form-fitting projections and

Rotary form-locking receptacles include or be provided to Drehformschlussvorsprüngen or Drehformschlussaufnahmen.

Drehformschlusskonturen can in the inventive connector on the inner circumference of the plug portion or on the outer circumference of the plug portion be provided. Preferred is a variant in which Drehformschlusskonturen both inside and outside are arranged. It is therefore advantageous if it is provided that the at least one rotational-locking contour has at least one inner rotational-locking end contour arranged on an inner circumference of the plug-in section for an outer rotational-locking counter-contour arranged on an outer circumference of the insertion counterpart and at least one on an outer circumference of the plug-in section arranged outer Drehformschlusskontur for a arranged on an inner circumference of the Aufsteck-connection counterpart inner Drehformschlussgegenkontur.

Appropriately, it is provided that are arranged on the plug portion Drehformschlusskonturen for producing a positive connection between the connector and the respective terminal counterpart, by a relative rotational movement of the connector and the connection counterpart about a longitudinal axis of the plug-in section or out of engagement with rotational form counter contours of the respective connection counterpart can be brought.

Advantageously, it is provided that the rotational form-fitting contours have at least one inner rotational-form-locking contour arranged on an inner circumference of the plug-in section for an outer rotational-form-locking counter-contour arranged on an outer circumference of the male-connector counterpart and at least one outer rotational-form-locking contour arranged on an outer circumference of the plug-in section a inner rotational form-fitting counter contour arranged on an inner circumference of the clip-on connector counterpart. On the plug-in section, in each case, rotary-forming contours are provided both inside and outside.

It is a basic idea that the connector is designed either for insertion and for attaching a connection counterpart and in each case can create a rotational form fit. The rotational form closure has the advantage over a positive connection exclusively in the plugging direction that it can ensure better grip in the pulling direction or in the direction of the longitudinal axis of the plug-in portion, which forms, for example, a thru-axle.

The rotational form-locking contours can be rotary-form-fitting projections and

Drehformschlussaufnahnnnen include or be provided on Drehformschlussvorsprüngen or Drehformschlussaufnahmen.

For example, the connection counterpart can be screwed to the connector according to the invention. The screwing is possible in both cases, namely on the one hand in the sense of unscrewing, that is, when the connection counterpart is screwed onto the connector, but also in the sense of screwing, that is, the connection counterpart is screwed into the connector. Particularly preferred is a

Plug-in rotary motion, i. that the connection piece and the connection counterpart are, so to speak, connected to one another and then fixed in a form-fitting manner by a rotational movement with one another. This will become clear later.

The Drehformschlusskonturen, so both the inner and the outer Drehformschlusskonturen, for example, one or more with respect to the plug axis spiral extending Umfangsdrehformschlusskonturen include. But even a perpendicular extending, designed for example as a circumferential groove, Umfangsdrehformschlusskontur is advantageous. Furthermore, it is advantageous if the peripheral rotational-form-locking contour comprises a thread and / or at least one bayonet rotational-form-locking contour or both.

From this it is clear in any case that many variants of Drehformschlusskonturen are possible, namely, threads, spirals, circumferential grooves which extend approximately at right angles or obtuse angled to the plug-in axis, hook-shaped structures or the like. Of course, a Drehformschlusskontur the connector also include, for example, a cam or a Drehformschluss- projection.

Advantageously, it is provided that a form-fitting contour, in particular a rotational-locking contour, is provided, which is at least one setting bevel or wedge slope has, with a relative rotation of the connecting piece and the connecting counterpart causes a displacement and / or distortion of the connecting piece and the connecting counterpart along the longitudinal axis to each other. Advantageously, two mutually cooperating pitches are provided on the connection piece and connection counterpart, wherein a set slope or wedge slope is sufficient.

Furthermore, it is possible that as it were inside and outside of the connector in geometric shape and / or size different Drehformschlusskonturen are provided. Furthermore, for example, inside Drehformschlussvorsprünge and externally Drehformschlussaufnahmen be provided. It is for example possible that, for example, radially outward a circumferential groove, a thread or a bayonet arrangement is provided, but inside for a einzusteckendes connection counterpart a cam or another rotary form-fitting contour. The inner rotational-form-locking contour is thus, for example, one which does not comprise a circumferential groove.

Advantageously, for example, provided in the sense of compatibility, that on the outer circumference or radially outside of the connector groove-like or grooved Drehformschlusskonturen, at least a groove-like Drehformschlusskontur is provided, while on the inner circumference or radially inside, so to speak single projections, cams or the like are present.

An advantageous embodiment of the invention provides, for example, that the at least one inner rotary mold closing contour of the connecting piece according to the invention and the associated inner Drehformschlussgegenkontur the connection counterpart are identical in shape. In terms of compatibility, it is also the case that the at least one outer rotary mold closing contour and the outer rotary mold closing counter contour (of the connecting counterpart) are identical in shape. The contour equality is preferably to be understood as meaning that geometry and / or size of the rotational form-fitting contours are identical or at least suitable for one another. In at least one, advantageously a plurality of circumferential rotational form-fitting contours, it is advantageous for the respective circumferential rotational-form-locking contour to communicate with a longitudinal guide contour extending essentially parallel to the plug-in axis, so that a rotary positive locking counter contour, for example a positive locking projection, cam or the like, can be introduced along the longitudinal guide contour into the circumferential rotary mold clamping contour and optionally is also moved out again. For example, the longitudinal guide contour is a guide channel or the like. For example, form the longitudinal guide contour and the Umfangsdrehformschlusskontur an L-shaped or hook-like arrangement. As already mentioned, the rotational-form-locking counter-contour can be moved along the longitudinal guide contour, so to speak, and then rotated, so that it engages in the at least one circumferential rotational-locking-mold contour in a conclusive manner.

However, the longitudinal guide contour may be relatively wide or wide, i. that it allows the rotational mold-closing counter contour along the longitudinal guide contour not only can be plugged or linearly moved, but also can be twisted to some extent. Thus, therefore, the rotational form-locking contour in the longitudinal guide contour can have a play transversely to the plug-in axis or transversely to the longitudinal axis of the plug-in portion, for example a rotational play.

An advantageous variant provides that the longitudinal guide contour narrows in the direction of the peripheral rotational-form-locking contour, ie is narrower, so that the

Drehformschlussgegenkontur so to speak is guided by the longitudinal guide contour in the direction of the Umfangsdrehformschlusskontur. The longitudinal guide contour can be wider in the region of its insertion opening and narrower in the region of the peripheral rotational-form-locking contour. For example, the longitudinal guide contour run funnel-shaped or conical.

The rotational form-closure contours can also comprise at least one form-fitting projection, for example a cam, a bayonet hook or the like, for screwing into a rotational-form-locking counter-contour extending in the circumferential direction about the longitudinal axis of the plug-in section. In fact, as well as the rotational form-fitting contours of the invention, Connection piece according to the invention, for example, circumferential grooves extending in the circumferential direction, spirally running Umfangsdrehformschlussschlusskontkonturen or the like.

The at least one form-fitting projection preferably forms part of the internal rotational-form-locking contours and protrudes radially inward in the direction of the flow channel in front of a circumferential wall of the plug-in section.

Preferably, at least one latching contour is provided, which is formed by the relative rotational movement of the connection piece and the connection counterpart about the longitudinal axis of the plug portion and / or a sliding or longitudinal movement, for example parallel or substantially parallel to the longitudinal axis of the plug portion or obliquely to this longitudinal axis, with a locking counter contour of the connection counterpart in latching engagement or out of a locking engagement can be brought. So in this case, there is not only a rotational form fit, but also a catch. The rotational form closure is thus additionally secured by a catch. In particular, this involves a rotational lock, rotational lock or the like. For example, the latching contour comprises a latching lug, a latching recess or the like. But also a Längsverrastung, which is to be brought into engagement or disengage relative to each other by the one sliding movement of the connection piece and connection counterpart, forms an additional safety measure.

The latching contour can be sprung, for example, by a spring or a spring element, for example a helical spring. It is preferred if the at least one latching contour to achieve a spring effect consists of an elastic material and / or is arranged on an elastic portion of the connection piece. Of course, it would also be possible for the latching contour to be stationary or hard, while the latching counter contour communicating with or cooperating with the latching contour of the connection piece is in turn spring-loaded. Thus, it does not have to be the case that the catch contour of the connection piece as such is resilient or resilient or elastic, but it may also be the connection counterpart which may not even be in accordance with the invention. have property, so for example, have an elastic locking counter contour. The detent counter contour may for example also be a latching hook or locking cams.

A further embodiment of the invention provides to secure the Drehfornnschluss by a lock, for example by a displaceably mounted on the connector or connecting piece locking element or the like. The locking element can engage in the locking contour of the connector to produce the lock.

The at least one latching contour expediently comprises a latching receptacle extending transversely to the relative rotary movement or a latching projection running transversely to the relative rotary movement, for example a rib.

The latching contour of the connection piece preferably extends approximately parallel to the longitudinal axis or to the plug-in axis of the plug-in section.

The latching contour and the latching counter contour can produce a latching, that is to say a longitudinal latching or rotary latching, in particular when the connection piece and the connection counterpart have reached their rotation end position. But it is also possible that the latching, in particular the Drehverrastung, so to speak, only an additional security, but still allow a relative rotational movement of fitting and connection counterpart. Then so have the fitting and the connection counterpart still a rotational play about the longitudinal axis of the plug-in portion or plug-in axis of the plug-in portion, although they are locked together.

A particularly preferred embodiment of the invention provides that the at least latching contour, for example the rib or the receptacle, between the already mentioned longitudinal guide contour and the Umfangsdrehformschlusskon- tur is arranged. For example, the at least one latching contour extends approximately in the axial extension, parallel to the plug-in axis or to the longitudinal axis of the plug-in section, to a side wall of the longitudinal guide contour. It is possible, that the at least one latching contour represents, as it were, a rib or a groove between the longitudinal guide contour and the circumferential rotational-form-locking contour.

An embodiment of the invention can provide that the plug portion and the plug-in portion carrying tubular body made of an identical or similar material. It is possible that the plug-in section and the tube body carrying this plug-in section consist for example of the same plastic and / or have the same hardness and / or elasticity.

A preferred embodiment provides that the plug-in portion is relatively soft, at least consists of a softer material than the tubular body carrying the plug-in portion. The male portion may also comprise a softer material than the tubular body carrying it, i. do not consist of the softer material as a whole. It is thus possible that the plug portion as a whole consists of the softer material or is designed as a multi-component component, i. for example, he has sections or components of a harder and sections or components of a softer material. The harder material is preferably the same as the tubular body.

It is preferred if a certain elasticity is present, which improves the preservation of the positive connection. For example, it is provided that the rotational-form-fitting contours and / or the latching contour are elastically yielding.

For example, it is advantageous if at least one of the rotational form closure contours and / or a latching contour is elastically yielding or are arranged on the elastically yielding material.

An advantageous variant of the invention can provide that a rotational-form-fitting contour, a latching contour or the like is relatively hard and the adjacent material is relatively soft. Thus, for example, such a variant provides that the at least one rotational-form-locking contour or locking contour consists of a harder or less elastic material than the plug-in section base body of the plug-in section which carries the rotational-form-locking contour or latching contour. Thus, therefore, the rotational locking or the latching on the basis of the relatively hard and thus wear-resistant material of the rotational mold clamping contour or the locking contour can be ensured. The connection is precise and accurate. On the other hand, the plug-in section base body yields slightly, so that the form-fitting co-operating contours of connection piece and connection counterpart, namely the rotational form-locking contours and the rotational form-fitting counter contours and / or the catch contour and the associated counter-locking contour can optimally abut each other.

It is also advantageous if a form-fitting contour, for example a rotary mold closing contour, plug mold contour or latching contour, consists of a relatively low friction and / or hard material, so that the respective form-fitting contour can easily slide along the form-fitting counter contour. It is possible that defined sliding surfaces are provided, i. Sections that can easily slide along each other. In addition to the sliding surface is then expediently a positive locking surface, but which has a higher friction, for example, because there is an elastic or softer material is provided.

An advantageous variant of the invention provides that at least one positive locking contour, for example, the at least one Drehformschlusskontur or the locking contour or both, are provided on a form-fitting body, such as a cam or other form-fitting projection, a receptacle, such as a groove or the like. At the respective form-fitting body expediently a recess, for example a groove, notch or the like, is provided, which is suitable for deforming the form-fitting body. If the form-fitting body is brought into engagement with the associated mating contour or disengaged, the recess allows deformation or yielding of the form-fitting body, so that, for example, the rotational form-locking contour or detent contour of the associated mating contour, namely the respective Drehformschlussgegenkontur or Rastgegenkontur move away , The recess can be completely free, so to speak to be filled with air, which allows a particularly high mobility. But it is also possible that the form-fitting body of a relatively hard material and the recess with softer material, for example, the plug-in body of the form-fitting body, as it were filled or filled.

It is advantageously provided that the connection piece has a pipe section constructed as a multi-component section, wherein a basic component of the pipe section forming a first component as a second component has at least one reinforcing element having a longitudinal shape of a harder and / or higher tensile strength compared to the base material and / or more rigid and / or higher rigidity stiffening material is embedded. The pipe section can for example form the plug-in section or another section of the connection piece. On the pipe section form-fitting elements, for example, for a longitudinal mold or a rotary mold closure, can be provided.

It is a basic idea that the base material is, so to speak, fundamentally more flexible than the stiffening material, so that, for example, a compression or widening during insertion or attachment to the connection counterpart is possible. At the same time, the stiffening material having a longitudinal shape, for example strip-shaped stiffening elements, ensures that the pipe section can bend less strongly with respect to its longitudinal direction. The pipe section is therefore, for example, more resistant to bending than another section of the suction hose connection, so that it is less prone to kinking. This facilitates, for example, the attachment of the connection piece and connection counterpart to one another.

It is understood that even a single stiffening element acts within the meaning of the invention, thus reducing the inclination of the pipe section for kinking. However, it is preferred if a plurality of stiffening elements are provided. The following explanations therefore relate to a connection piece, in which a plurality of stiffening elements are usually provided. When it comes to the geometric shapes of a respective stiffening element, are this of course also readily possible with a single stiffening element.

The at least one stiffening element expediently parallel to a longitudinal axis of the at least one pipe section. But they can also have an angle to the longitudinal axis, in particular an angle of less than 90 °, in particular less than 45 °. Particularly preferred is a relatively low inclination of the stiffening elements to the longitudinal axis of the pipe section, for example of about 5-20 °. Thus, the stiffening elements can optimally stiffen the pipe section transversely to the longitudinal axis.

For example, the at least one stiffening element extends in the direction of a plug-in axis, along which the connection piece can be connected to the connection counterpart. The at least one stiffening element counteracts a kinking of the pipe section.

It is also possible for at least one stiffening element and / or at least part of the stiffening elements to extend in the circumferential direction of the pipe section. The at least one stiffening element or the stiffening elements have, for example, an annular or circular or arcuate course and / or are arranged in a circular or arcuate manner. For example, the stiffener works so that the pipe section is less likely to collapse.

Furthermore, it is possible for the stiffening elements to be chaotically or unevenly embedded in the base material of the connection piece, as it were. For example, it is possible for the stiffening elements to comprise or be formed by fibers.

Suitably, it can also be provided that the at least one stiffening element is not configured as a knitted fabric. It is therefore expedient if the stiffening elements have a directional structure, that is to say that in the case of a fiber structure, for example, the stiffening elements essentially chen parallel to each other, in particular in the direction of the longitudinal axis are aligned.

Advantageously, it can be provided that the at least one stiffening element has a larger cross-section than a glass fiber or textile fiber. The at least one stiffening element can be relatively massive, that is to say not configured as a thin fiber. Nevertheless, the stiffening element may e.g. be configured in the shape of a lamella or have lamellae.

It is advantageously provided that the at least one stiffening element is not configured as a whole as a sleeve. This measure can contribute to the fact that the stiffening element is yielding transversely to the longitudinal axis.

It is advantageous if the at least one stiffening element is not made of metal. It is advantageous if the at least one stiffening element consists of plastic or a plastic material.

Below some measures are proposed that facilitate the deformability of the pipe section transverse to the longitudinal axis.

The stiffening elements expediently have a transverse spacing transverse to the longitudinal axis or in a circumferential direction about the longitudinal axis. As a result, the base material of the pipe section can deform elastically transversely to the longitudinal axis, wherein the stiffening elements afford little or no resistance.

The stiffening elements are conveniently in the circumferential direction, i. around the longitudinal axis, a transverse distance from each other.

The distances between the stiffening elements help or make it possible for the circumference of the pipe section to be easily widened or compressed, which makes it easier to plug on or plug in on or into the connection counterpart, or even makes it possible in some cases. The at least one stiffening element or several stiffening elements are preferably strip-shaped. A respective stiffening element thus forms, for example, a stiffening strip. The stiffening elements are preferably laminar. The stiffening elements may for example be designed in the manner of stiffening blades. It is preferred if a respective stiffening element is leaf-like.

It is expedient if the at least one stiffening element has a curvature and / or an angular contour transversely to its longitudinal direction or transversely to its longitudinal direction. The curvature or longitudinal contour can only be provided on at least one longitudinal section, ie not over the entire length of the stiffening element. The stiffening element thereby has a higher mechanical load-bearing capacity and / or is stiffer. For example, the stiffening element in cross section is annular or circular. The at least one stiffening element has, for example, an arcuate cross section or an arcuate contour at its inner radius and / or at its outer radius. The stiffening element may have in cross-section but also two or more mutually angled legs. The at least one stiffening element may have at least one angle in cross-section or be polygonal. The at least one stiffening element expediently has a non-planar contour transversely to its longitudinal direction and / or in cross-section.

A preferred embodiment of the invention provides that a plurality of stiffening elements in the manner of circular segments are arranged side by side. Between the stiffening elements is in each case an arcuate distance or angular distance.

It is understood that a combination of stiffening fibers and lamellar or strip-like stiffening elements is readily possible.

It is preferred if the stiffening elements extend along the entire circumference of the pipe section, ie, the pipe section has, as it were, a total of stiffening elements on its circumference. The stiffening elements may form a kind of cage structure about the longitudinal axis of the pipe section.

The stiffening elements have, for example, with respect to their longitudinal direction on a different transverse width. For example, they are somewhat narrower in the region of their free longitudinal ends than on another longitudinal end region or in the region between their longitudinal ends, for example in the region of their longitudinal center.

The pipe section with the stiffening elements can for example form the plug-in section of the connection piece. The stiffened by the stiffening elements plug portion can be infected in a particularly favorable manner to the connection counterpart. The plug connection is stable and loadable. The plug-in portion has a significantly higher buckling strength compared to such a plug-in portion which has no stiffening elements.

The stiffening elements or at least some of them, for example two or more, are expediently connected to one another in the circumferential direction of the pipe section by a connecting section. The connecting portion may for example be formed by a circular segment-like or annular connecting body. It is particularly preferred if the tubular body forms such a connecting portion. For example, it is possible for at least one stiffening element to project from the tubular body into the tubular section reinforced by the stiffening structure or the stiffening elements. For example, the stiffening elements are in the manner of fingers from the tubular body or the other connecting portion and are embedded in the base material of the pipe section they stiffen. It can also be provided that the tubular body is provided as a connecting portion and an additional, separate from the tubular body connecting portion for connecting stiffening elements.

It is preferred if the at least one stiffening element is integral or integral with the tubular body. It is preferred if the material of the tubular body forms the material of the at least one stiffening element, that is to say the stiffening material. This variant of the invention is readily possible, for example, if the at least one stiffening element, preferably a plurality of stiffening elements, protrude from the tube body in the direction of the tube section reinforced by the stiffening structure. However, it is also possible that in a spraying or casting process a specific material, for example plastic, is used to produce at least one stiffening element and a separate tubular body, which in a second production step are interconnected by the base material of the pipe section.

It is preferred if the stiffening material and / or the at least one stiffening element is partially or completely sheathed or covered by the base material of the pipe section. Thus, for example, a relatively soft and / or a large Reibschlusskoeffizienten exhibiting and / or elastic base material partially or completely surround the stiffening material or the at least one stiffening element. It is preferred if the stiffening element is covered or encased radially outside and / or radially inward with the base material, in particular in the contact area for contact with the connection counterpart.

To the at least one stiffening element or the stiffening material of the pipe section, an inner component and an outer component of the base material of the pipe section are expediently formed in separate operations, for example injection-molded or cast-on. It should be noted only marginally that the base material in a preferred embodiment of the invention is homogeneous, that is, comprises a single material. But it is also possible to use different materials as base material, for example plastics of different elasticity. Thus, it is readily possible for example in the aforementioned embodiment with inner component and outer component, for example, to use a different base material for the inner component than for the outer component. The base material of the advantageous stiffened tube section may thus comprise a first and a second base material.

The plug portion and / or the pipe section expediently has at least a portion of the flow channel.

Forming contours, for example form-fitting receptacles or form-fitting projections, can be provided on the advantageously stiffened pipe section. These may be formed by the softer and / or harder material, that is, for example, the base material and / or the stiffening material. The form-fitting contours may comprise, for example, rotational form-locking contours, longitudinal locking contours or the like. The Drehformschlusskonturen can

Rotary form-fitting protrusions and rotary form-locking receptacles may comprise or be provided on rotational-form-locking projections or rotational-form-fitting receptacles.

On a stiffening element can also be provided a positive locking contour. The form-fitting contour is suitable, for example, as a rotational form-fitting contour, latching contour, in particular a longitudinal catch contour or the like, in order to provide a form-fitting hold of the connection counterpart. The form-fitting contour thus cooperates with a form-fitting counter-contour of the connection counterpart when the connection piece is connected to the connection counterpart.

The form-fitting contour projects, for example, in front of the base material, completely or only in sections. Thus, for example, a type of cam or bump or another form-fitting projection may be provided on the stiffening element, which protrudes radially outward or radially in front of the base material of the pipe section. Of course, a positive connection to the at least one stiffening element is possible. Furthermore, it is possible that the form-fitting contour of the base material is at least partially sheathed. The base material is relatively soft, so for example, can have a higher friction than the stiffening material, which leads to the fact that the Positive locking contour with the positive locking counter contour is better ensured by correspondingly higher friction.

An advantageous measure provides that projects the at least one stiffening element with at least one portion, for example, the aforementioned form-fitting contour or on another surface in front of the base material, so that a sliding surface or electrically conductive surface is formed.

The plug portion has at least a portion of the flow channel.

Conveniently, a release of the connection counterpart from the connector with respect to the longitudinal axis counteracting longitudinal locking contour is arranged on the plug portion.

By Längsverrastung it is possible that the connector finds a firm hold on the connection counterpart with respect to the thru axle.

It is a basic idea that the rotary mold closing contour with the

Drehformschlussgegenkontur represents an optimal grip with respect to the longitudinal axis. In any case, with respect to a thru-axle or the longitudinal axis a better grip is given than solely by the Längsverrastung.

Advantageously, the material of the plug-in portion is elastically or elastically yielding, whereby on the one hand the longitudinal latching is advantageously easier to produce or detachable. If the at least one rotational-form-locking contour is also present on the elastic or yielding, in any case relatively soft section of the plug-in section, this can also provide a slight locking, but on the other hand also allow a firm hold. For example, provides a frictional engagement between the material of the male section, which is relatively soft, and the connection counterpart for optimum grip on the connection counterpart.

However, the connection counterpart can also have only one rotational form-fitting counter-contour or only one longitudinal counter-locking contour. The fitting is compatible with both types of connection counterparts since it has a longitudinal locking contour and has at least one rotary mold closing contour. Thus, the connection piece according to the invention can cooperate with, so to speak, old connection counterparts mentioned at the beginning, but also with new connection counterparts, which have turned-form counter contours.

It can be provided one or more Längsrastkonturen. The long-latching contour can comprise, for example, a hook receptacle, latching receptacle or the like. A respective longitudinal locking contour can be, for example, part-ring-shaped. It is particularly preferred if a long-locking contour is annular. For example, the long-locking contour may comprise a circumferential groove or a particular circumferential, annular projection.

The long-rest contour may also include a rib structure.

The at least one long-latching contour can be arranged on an inner circumference or an outer circumference of the plug-in section. It is also possible that at least one longitudinal locking contour is present both on the outer circumference and on the inner circumference.

It is advantageous if the at least one long-locking contour and the at least one rotational-form-locking contour are both arranged on the inner circumference or on the outer circumference.

Furthermore, it is possible to have at least one longitudinal latching contour on the inner circumference of the plug-in section and the at least one rotary-shaped closing contour on the outer circumference or, conversely, on the inner circumference the rotary-shaped closing contour and on the outer circumference the long-locking contour.

The at least one rotational-form-locking contour and the at least one longitudinal-locking contour are preferably arranged one behind the other with respect to a plug-in axis or an insertion direction. The arrangement can be made such that, for example, the long-locking contour is arranged closer to the insertion opening or the plug-in contour of the plug-in section, so that a connection counterpart when plugged into the connection piece initially with the longitudinal latching contour in Kon- then comes with the at least one rotational mold closing contour, for example, if at the connection counterpart a cooperating with the rotational mold clamping contour rotary mold counter-contour is present.

An advantageous measure provides in the presence of Drehformschlusskontu- reindeer or at least one Drehformschlußkontur on the plug section before, that a release of the connection counterpart from the connector with respect to the longitudinal axis counteracting Längsrastkontur is arranged, which when attaching the connection counterpart to the connector along the longitudinal axis of the plug-in section comes into engagement with a longitudinal latching contour of the connection counterpart.

The connector according to the invention is preferably made of plastic. However, metallic components are also possible. In particular, metal is suitable for better conductivity, for example for dissipation of electrostatic charge.

A preferred, relatively hard material from which, for example, a so-called hard component, in particular the tubular body and / or at least one of the stiffening elements consists entirely or substantially, is expediently polypropylene or a polyamide. The harder material may also include a thermoplastic elastomer (TPE). Although these materials can be used for the softer material, but then have a lower strength or hardness. Depending on the crosslinking of the thermoplastic elastomer and / or composition of the constituents of the elastomer, the hard property can be adjusted so to speak. The thermoplastic elastomer is, for example, a so-called copolymer and consists of a "soft" elastomeric and a "hard" thermoplastic component, the proportions of which are selected according to the desired Shore hardness.

For example, the harder or stiffer material is 1, 5, or 2 to 3 times as stiff as the softer material. The stiffer material can also be four times or five times as stiff as the softer material. This is true even then if both materials basically have, as it were, the same chemical base, for example TPE plastics of similar design, for example TPE-U or TPU (urethane-based thermoplastic elastomers) or TPE-S or TPS = styrene block copolymers (SBS, SEBS, SEPS, SEEPS and MBS).

The softer or more elastic material of which, for example, the plug-in base body, in particular its inner component and / or outer component, consists, in particular its inner component and / or outer component, is preferably an elastomer, in particular a thermoplastic elastomer. The elastomer is e.g. a vulcanizate of natural rubber and silicone rubber. It is understood that the softer material may also include or may be formed by rubber, rubber or the like.

The plug-in section basic body of the plug-in section, in particular its inner component, preferably consists of a softer or more elastic material than the tubular body. The relatively soft, elastic plug-in section ensures a tight fit and a high tightness at the mating portion of the connection counterpart. In addition, the male portion has a certain tolerance, i. it fits as it were to the geometry of the associated counter-plug portion of the connection counterpart something due to its elasticity or softness.

The illustrated different materials may be advantageously provided for different purposes, for example, harder materials for positive contours and softer materials to provide their compliance. The softer or more resilient base material may also serve to compliantly form a portion of the fitting, for example, for compression upon insertion into a mating receptacle of the mating connector, or a widening capability when mated with a mating portion of the mating connector. Hardened and / or more resistant to tensile stress and / or bending-resistant materials, which are adjacent thereto or preferably embedded in the softer section in the direction of a longitudinal axis of this softer section serve, for example, to stiffen this softer section or else to conclusion, for example, the suction hose. A relatively hard tubular body is suitable, for example, to receive a holder for the suction hose rotatably, but with a high tensile strength.

It is also advantageous if relatively hard materials are embedded in a softer material, as it were, or at least partially covered or sheathed by softer material. The softer material, for example, has a higher friction than a harder material, whereby a frictional connection or the grip of the connection piece and connection counterpart is improved. It is for example possible that, for example, a form-fitting body, which forms a latching contour, form-fitting contour, in particular rotational-form-locking contour or the like, is produced with a coating of a softer material.

In the context of the invention, it is also when a form-fitting body is integral or homogeneous with the base body on which it is arranged, for example, the plug-in base body or the like.

Furthermore, different hard and / or different tensile strength and / or different elastic materials are suitable to produce the connector as a whole or in sections as a multi-component component or form a connector with a multi-component section.

The different materials of the connector are characterized for example by the following properties. A harder component or a harder material, for example, has a hardness of 20-100 Shore D or 30-100 Shore D. However, the harder component can also be slightly softer overall, for example 20-70 Shore D, 30-70 Shore D or 30- Have 60 Shore D. In the case of the soft component or the softer material, it is advantageous if it has a hardness of 40-100 Shore A, particularly preferably 50-90 Shore A. But also a hardness of 60-80 Shore A are possible without further ado.

With regard to the elasticity, the one, for example, harder component or the one, for example, harder material has a modulus of elasticity of, for example, 80-2500 N / mm ² , in particular 1000 to 1800 N / mm ² . The softer or more elastic material, however, is characterized by a modulus of elasticity of at most 800 N / mm ² , expediently of not more than 700 N / mm ² , particularly preferably of not more than 600 N / mm ² .

With respect to the elongation at break or elongation at break, it is advantageous if the softer component or the softer material has an elongation at break or elongation at break of at least 70%, particularly preferably at least 80% or even at least 100%. With the harder or less tear-resistant material, an elongation at break or elongation at break greater than 5% or 10%, advantageously greater than 30%, but also greater than 40% or 50% is advantageous.

A rigidity of the harder or stiffer material is suitably 1, 5 or twice to 3 times as high as the stiffness of the softer or less stiff material. The illustrated stiffening elements preferably have such a higher rigidity than the base material of the pipe section, even if the base material and the stiffening material are chemically similar or have, so to speak, the same chemical base (for example TPE, in particular TPE-S or TPE-U / TPU) or plug-in section.

Furthermore, electrically conductive, in particular electrically differently conductive, materials are advantageously provided. Electrically conductive materials are suitable, for example, to dissipate electrostatic charges. Thus, a softer and / or a harder material of the connector according to the invention may be electrically conductive. It is also possible that the connector as a whole or parts thereof are electrically non-conductive.

For electrically differently conductive materials, for example, the more elastic or softer material may be less electrically conductive than the harder material or vice versa. In any case, it is advantageous if the second, electrically conductive material projects at least there before the first, electrically less conductive material, for example the elastic material, where an electrical contact or an electrical connection with the connection counterpart is necessary. is dig or advantageous. Thus, it is an advantageous variant of the invention if the connecting piece has a first, electrically less conductive material than a second material, wherein the second material protrudes at least in sections before the first material for establishing an electrical connection with the connection counterpart or before the first material is arranged.

The connector according to the invention may for example have a holder for a suction hose. The holder may be integrally provided on the tubular body, for example, have corresponding receiving ribs for a reinforcing spiral of a suction hose. Preferably, however, the holder is provided on the tubular body as a separate component, for example, rotatably received on the tubular body, but fixed tensile strength on the tubular body. It is also possible that the holder is fixed to the tubular body fixed, so immobile or with a small clearance.

The connection piece according to the invention and the connection counterpart expediently form a system of connection piece and connection counterpart. Of course, all of the above and subsequent embodiments of the connector also apply to the connection counterpart. The connection counterpart, like the connection piece, can form an integral part of a hand-held machine tool or a vacuum cleaner or a suction hose.

In the embodiments of the connector explained embodiments are also possible with a connection counterpart readily. The respective connecting pieces or connection counterparts can also form components of machine tools or suction devices. Furthermore, a connector according to the invention, for example, have two or more plug-in sections. For example, two plug-in sections may be provided on opposite sides of the tubular body. Furthermore, at least two plug-in sections can be arranged on one and the same side, which are suitable for different plug-in diameter of the connection counterpart. Such plug-in sections can be nested coaxially, for example. The connecting piece expediently has a holder for a suction hose. The holder has, for example, clamping contours or holding contours or form-fitting contours for the suction hose. In particular, screw contours or other contours for fastening, in particular tension-resistant and / or non-rotatable fastening, of the suction hose are provided on the holder. The holder is expediently provided on the tubular body. With regard to the tubular body or another component of the connecting piece, the holder is for example rotationally fixed and / or non-sliding and / or fixed. The holder can also form an integral part of the connector, for example, be designed in one piece with the tubular body. The holder may be rotatable relative to the plug portion. The holder is expediently displaced relative to the plug-in section along the longitudinal axis. It is also possible that the holder, although displaceable relative to the longitudinal axis, but is rotatably mounted on the tubular body or other portion of the connector.

At least one form-fitting body of the connecting piece, with which, for example, a rotational locking contour, a longitudinal locking contour or the like is formed, has a base material which at least partially covers, in particular sheaths, a material in the region of the form-fitting contour that is softer or more elastic relative to the base material. Furthermore, it is advantageous if this other material has a higher coefficient of friction than the base material. Thus, in any case, the positive connection is improved with a counter-form-locking contour which cooperates with the form-fitting contour.

The connector according to the invention can also be a part of a

Make hand machine tool. As a hand-held machine tool is understood in this case, a machine tool, for example, is portable, such as a chop saw. Preferred is the use, for example, in portable circular saws, milling machines or the like. The turn-molded contours ensure particularly firm and reliable hold. The connector may be fixed to the hand-held machine tool, but also designed to be removable. The connecting piece may comprise a plurality of components arranged one behind the other in the row direction, for example the plug-in section and a one-piece or multi-part tubular body. By way of example, the multi-part tubular body can be configured such that it has two tubular body sections which are rotatable relative to each other and / or displaceable. Furthermore, it is possible that the tubular body is divisible, for example, has screwed together, lockable, latchable or otherwise releasably connectable to each other sections.

The connection piece can also be a separate connecting piece designed, for example, as an adapter, with which, for example, two tube sections of the suction tube can be connected to one another.

The connecting piece according to the invention can be round, for example, in cross-section. But it is also possible that the connector has a polygonal cross-section. For example, it is conceivable that the connection piece still remains rotatable even in the case of a polygonal cross section, for example with at least 8 or 12 corners, ie relatively flat-angled corner regions, so that it can be rotated relative to the connection counterpart and yield, as it were, the elastic regions during the rotational movement.

A plug-in section of a connection piece according to the invention can serve for inserting or plugging the connection counterpart along the longitudinal axis of the plug-in section, as it were the plug-in axis. Furthermore, it is possible that this plug movement is superimposed on a rotational movement, so that in principle the connection piece and the connection counterpart along the longitudinal axis of the plug section relative to each other, but simultaneously rotated relative to each other when the connection between the connection piece and connection counterpart is made. It is also a sequential connection possible, that is, the connection piece and the connection counterpart rotated in a sequential ellen movement relative to each other and are infected along the longitudinal axis or thru-axle to each other or detached from each other. Hereinafter, embodiments of the invention will be explained with reference to the drawing. 1 shows an exploded view of a variant of the connection piece according to FIG. 1, of which a plug-in section is shown, a side view of a connection piece Variant of the connection piece according to FIG. 2, to which a connection counterpart is attached in the illustration (cross-sectional view along a section line BB in FIG. 5) and into which a connection counterpiece is inserted (cross-sectional view along a section line CC in FIG. 5) Arrangement with the connector of Figure 5 in combination with several, different connection counterparts, which are connectable to the connector and compatible, a vacuum cleaner with a suction hose, at the free end of a connector in the manner of example Connecting piece is arranged according to Figure 5,

FIG. 10 shows an enlarged detailed view of FIG. 9 from the side, a front end of the suction hose of the vacuum cleaner according to Figures 9, 10, wherein a connecting counterpart is fitted to the connector, a variant of the vacuum cleaner according to Figure 9, which is equipped with a connector according to the invention, for example in the manner shown in Figure 5, a side view a hand-held machine tool in the form of a grinding machine, the suction hose connection forms a connection counterpart, on which a connection piece according to, for example, Figure 7 is plugged, a view from behind on a variant of

Hand machine tool according to Figure 13, which is alternatively equipped with a fitting according to the invention, for example in the manner of the connector of Figure 19 or Figure 5 or 8, another hand-held machine tool in the form of a sawing machine to which a suction hose with a According to FIG. 15, a first variant of the suction hose connection of the hand-held machine tool designed according to the invention, wherein the latter has a first connection piece according to the invention, comprises a second embodiment configured according to the invention Variant of the suction hose connection of the hand-held machine tool with a second connecting piece, approximately corresponding to the connecting piece according to FIG. 5 or 8, FIG. 19 shows the arrangement according to FIG. 18 with a connected suction hose

Hereinafter, some embodiments of the invention are explained in which partially identical or similar components or components are provided. In this case, if possible, the same reference numerals are used Furthermore, features of the connection piece explained below are also advantageous in the case of the connection counterparts which are suitable for this connection piece. The connection counterparts expediently form system components of a system of connection piece and connection counterpart. Furthermore, some connection counterparts, if they have, for example radially inward and radially outward rotational form-fitting contours, according to the invention.

A connector 10 for a suction hose 100 has, for example, a tubular body 1 1. To the tubular body 1 1, a plug-in portion 50 connects, which is suitable for attaching a port counterpart 200 according to Figure 6 or for inserting a port counterpart 380 as shown in Figure 7.

The tubular body 1 1 comprises a peripheral wall 12 which limits a receptacle 19. In the receptacle 19, a holder 40 is used for the suction hose 100. The holder 40, which comprises, for example, a tubular holding body 41, is preferably received rotatably in the receptacle 19. A peripheral wall 43a of the holder 40 is rotatably supported, for example, on the inner side 14 of the peripheral wall 12 of the tubular body 1 1 rotatably. Inside, the holding body 41 has a holding structure 43 for holding the suction hose 100, for example, a rib structure or a thread into which the suction hose 100 with its not shown, in particular spirally in reinforcing ribs, can be screwed. A front, free end face 42 of the holding body 41 and the holder 40 is located on a bottom 15 of the tubular body 1 1 frontally.

The holder 40 is fixed by a holding element 45 on the tubular body 12. For example, a support flange or a retaining projection 47 is supported on a front, free end face or narrow side 16 of the tubular body 11. examples For example, a support surface 48 of the retaining projection 47 abuts against the free end face 16. A front, free end face 46 of the holding element 45 supports an end face 44 of the holder 40 so that the holder 40 is held sandwiched between the holding element 45 and the bottom 15 of the receptacle 19 and / or sliding.

For a captive during use hold of the holding element 45 latching projections or retaining projections 49 are provided which protrude radially outward in front of the holding element 45 and its base body or holding body, and engage in locking receptacles or holding receptacles 13 of the tubular body 12. Preferably, the retaining projections 49 are resilient or designed in the manner of latching pawls, so that they can be displaced inwardly in the direction of the receptacle 19 in order to release the retaining element 45 from the tubular body 12.

It is understood that in an embodiment, not shown, the tubular body 1 1, the holding structure 43 may include integrally, and therefore so the suction hose 100 can receive and hold directly.

The tubular body 1 1 and / or the holding element 45 and / or the holder 40 are preferably made of a relatively hard plastic material, such as polypropylene. As a result, the necessary for holding the suction hose 100 strength is readily ensured. But it is also possible that, for example, the holding element 45 and the tubular body 1 1 are made of a harder material than the holder 40 for the suction hose 100. Anyway, the connector 1 1 in the region of the tubular body 1 1 harder than in the region of the plug portion 50, whose base material is a plastic with lower hardness and in particular a higher flexibility or elasticity. For example, the base material of the male portion 50 is a thermoplastic elastomer.

Nevertheless, also the plug portion 50 has a relatively high bending strength, in any case a higher bending strength than would be the case if only thermoplastic elastomer were used. For stiffening a stiffening structure 20 is provided with a plurality of stiffening elements 21. The material of the Stiffening elements 21 is harder and / or more tensile and / or bending resistant and / or stiffer than the base material of the plug portion 50. Preferably, the material of the Versteifungselennente 21 is at least 1, 5 times, preferably 2 to 3 times or even four times harder or stiffer than that of the base material the stiffened by the stiffening elements 21 portion of the connector, for example, the plug portion 50th

The plug-in section 50 forms a pipe section 35. The plug section 50 is suitable for plugging or plugging in a complementary GE plug-in section and is on the one hand elastically yielding, so as to enable an optimal form-fit and optimum tightness with the connection counterpart, on the other hand transversely to the longitudinal axis L or thru axle relatively stiff. Only marginally it should be noted that, of course, the tubular body 1 1 in the manner of the male section 50 or pipe section 35 may be configured, although that is not shown in the drawing, so for example may consist of a relatively soft material stiffening elements.

The base material of the plug-in portion 50 forms an inner component 52 and an outer component 51, the stiffening elements 21, which are strip-shaped, advantageously completely encased. The stiffening elements 21 protrude in the manner of strips or lamellae from the tube body 12 forming a connecting section 25 or connecting body of the stiffening elements 21 in the direction of the plug-in section 50. Between the stiffening elements 21, a circumferential distance 24 is provided in each case, so that the stiffening elements 21 have a spacing in the circumferential direction. The stiffening elements 21 can thus move closer to one another in the circumferential direction or be spread apart so that a cross-section of the plug-in section 50 can be reduced or increased if the plug-in section 50 is plugged onto a respective connection counterpart 300 or plugged into a connection counterpart 200.

The mobility or elasticity of the plug-in portion 50 is further improved by the fact that the free end portions 23 of the stiffening elements 21 are narrower than the foot portions or other longitudinal end portions 22, which with the Tube body 12 are connected. As already mentioned, the tubular body 12 forms a connecting body for the reinforcing elements 21 so that they are connected to each other at one longitudinal end, at their free Längsendbereichen 23 in terms of enlargement or reduction of the cross section of the plug portion 50 toward each other or away from each other.

The stiffening elements 21 are round in cross-section, wherein the radius corresponds approximately to the radius of the tubular body 1 1. The non-planar in cross-section, i. Rounded or angular contour of the stiffening elements 21 acts in the sense of stiffening.

The stiffening elements 21 and the tubular body 1 1 are made for example of polypropylene, at least one of the initially mentioned relatively hard materials. The inner component 51 and the outer component 52, however, are softer and more elastic, for example made of rubber or of an elastomer, in particular a thermoplastic elastomer.

The inner component 52 and the outer component 51 of the male portion 50 integrally receive the stiffening structure 22, that is, the stiffening members 21 are sandwiched, as it were, between the inner component 52 and the outer component 51. The inner component 52 and the outer component 51 are expediently injection molded sequentially onto the stiffening structure 20 and consequently onto the tubular body 11.

For this purpose, for example, two or more spray passages are provided, in which, for example, first the inner component 52 is injection-molded or integrally formed on the reinforcing elements 21, then the outer component 51. A preferred variant of the production provides that first the inner component 52, then the stiffening elements 21, in particular integrally the tubular body 1 1, and then the outer component 51 are injected or poured.

In such an injection process, for example, webs 53 form, which define the spaces or distances between the stiffening elements 21, so the circumferential distances 24, fill. Between the webs 53 are wall sections 54 which cover the radially inner side of the reinforcing elements 21, so to speak. The wall sections 54 are slightly thinner compared to the webs 53, for example like a skin. However, they preferably completely cover the stiffening elements 21 on the inside, so that they are covered with the elastic material of the interior component 52 in the region of a plug-in receptacle 55, which they define radially on the outside.

In the case of the outer component 51, webs 53 are expediently likewise provided, between which wall sections 57 are located. The wall sections 57 cover the stiffening elements 21 on the outside, thus forming an outer wall of the plug-in section 50, while the webs 53 of the outer component 51 and the inner component 52 connect to each other and fill the gaps or spaces between the stiffening elements 21. It can be seen that the webs 53 are elastically yielding due to the elastic material of the outer component 51 and the inner component 52, so that the stiffening elements 21 which are leaf-like or lamellar can move towards or away from each other at least in the region of their free longitudinal ends 23. This mobility is further facilitated by the fact that the transverse distance 24 between the stiffening elements 21 in the region of the free longitudinal ends 23 is greater than in the region of its other longitudinal end regions or foot regions 22.

In FIG. 4, the plug-in section 50 is completely drawn, ie the inner component 52 in the state already connected to the outer component 51. By the fastest possible injection process, with which the two components 51, 52 are made, the base material of the plug-in portion 50 connects as homogeneously as possible. It is also conceivable that the plug-in portion 50 is molded or cast as a whole on the stiffening structure 20 and the tubular body 1 1 (in an injection or casting process). In any case, 60 cavities 59 are provided for the stiffening elements 21 at the plug portion 50 and its plug-in base body. On an inner periphery of the plug-in receptacle 55 is also a rib structure 56, which is suitably formed by the elastic or elastomeric material of the inner component 52 and a firm hold and / or a high tightness, for example on a relatively smooth connection piece or connection counterpart 505, for example, the hand-held machine tool 500 according to Figures 15, 16 can produce. For example, the connection element 505 can be inserted into the plug-in receptacle 55 or the connection piece 10 can be plugged onto the connection counterpart 505.

The rib structure 56 comprises one or more annular, in particular circumferential, longitudinal latching contours 61, for example grooves 62. These allow longitudinal locking with longitudinal-latching counter-contours 302 on a plug-in section 301 of the connection counterpart 300, which can be inserted into the plug-in receptacle 55. The connecting counterpart 300 is connectable to a suction hose, a hand-held power tool or the like, for example, by means of clamping arms or holding arms 303, between which expediently spacings 304 are present. For example, a thread or a latching structure 305 for screwing or latching with a connecting element, in particular a suction hose or a hose, is located on the retaining arms 303

Hand machine tool or a vacuum cleaner. This is only to be understood by way of example, since the plug-in portion 301 is essential here, while the other side 307 may be designed quite differently with, for example, the holding arms 303. For example, it is possible that the side or portion 307 forms an integral part of a hand machine tool, a vacuum cleaner, or the like.

The connection counterpart 300 may be a component consisting, for example, of polypropylene or another hard plastic. However, the elastically yielding plug-in portion 50 of the connector 10 gives something when inserting the plug-in portion 301 of the connection counterpart 300, for example in the sense of expansion, so that the rib structure 56 and thus the longitudinal latching contours 61 can engage with the longitudinal latching counter contours 302 and these in one Pull direction or direction of a Hold longitudinal axis L of plug-in section 50. At the same time, an optimal frictional connection is provided, because expediently the base material of the plug-in section 50 has a high coefficient of friction, in any case a higher coefficient of friction than the material of the tubular body 11.

The relatively soft, at least compliant plug-in section 50 can also expand to such an extent or be so yielding that a connection counterpart 350 can be inserted into the plug-in receptacle 55, which has rotationally positive counter contours 352 at its plug-in section 351. These cooperate with rotationally conforming contours 75 of the connecting piece 10, namely with a positive locking projection 26 projecting inwardly into the plug-in receptacle 55. The connecting counterpart is shown in FIG.

It is conceivable, for example, for a front section of a connecting piece 380, which corresponds approximately to the connection piece 300, to have rotationally positive counter contours 352, which is indicated in FIG. The rotational form-fitting counter-contours 352 can be brought into engagement with the rotational-form-locking contours 75 or the form-fitting projections 26 of the connecting piece 10.

The interlocking protrusions 26 could, for example, be formed integrally from the base material of the plug-in base body 60, ie, for example, from the inner component 52. In the present case, however, the configuration is such that the interlocking protrusions 26 are arranged on the reinforcing elements 21 and through recesses 58 of the inner component 52 in the Plug-in receptacle 55 of the connector 50 protrude. There they form cams, which can engage with the rotary mold counter contours 352 or later described Drehformschlusskonturen 70. The rotational form-fitting counter-contours 352 basically correspond in terms of geometry and shape to rotational-form-locking contours 70 on the outer circumference of the plug-in section 50 or of the connecting piece 10, which will be explained in more detail.

The form-fitting projections 26 may include, for example, form-fitting parts 27 and 28, which are arranged on adjacent stiffening elements 21. The interlocking parts 27 and 28 may be separate components as shown in FIG. 3, but interconnected by the inner component 52 or the outer component 51. Thus, for example, between the positive-fit parts 27 and 28, a section with elastic plastic or the like can be.

A preferred exemplary embodiment is indicated in FIG. 2, namely, where positively locking parts 27 'and 28' are connected, as it were, to a common shape-locking projection 26 with a section 26 '. However, there is still a recess 29 between the sections or parts 27 ', 28', so that the sections or parts 27 ', 28', while bridging the circumferential distance 24 of the stiffening elements 21 to which they are arranged with the section 26 ', however relative to each other due to the recess 29 are movable. The positive locking projection 26 according to the embodiment in Figure 2 is thus formed on the basis of two positive-locking parts 27 'and 28', which are arranged on adjacent stiffening elements 21, but the relative movement of the stiffening elements 21 towards each other or away from each other due to the recess 29 less hinder as it would do a so-to-say massive form-locking projection 26. The recess 29 is suitably filled with elastic material, such as the inner component 52, but could also be free, so quasi contain only air.

As in the exemplary embodiment according to FIG. 6, slit-like recesses 29 'can also be provided in a respective form-fitting projection 26.

The positive-fit projections 26 protrude inwards through the recesses 58 in front of the inner component 52 into the plug-in receptacle 55. Thus, the positive locking projections 26 are formed of a relatively hard material, such as polypropylene, which ensures high dimensional accuracy and resilience.

It is understood that the positive-fit projections 26 can also be encased at least partially by the material of the plug-in base body 60, which is indicated in FIG. For example, the positive-fit projections 26 are ne- Ben of the recess 58 or in the region of the recess 58 of wall sections 58 ', for example, the inner component 52 at least partially or completely covered. The relatively soft material of the wall sections 58 ', for example, increases the frictional engagement with associated counter-form-fitting contours, for example the rotational form-locking contours 70, which will be explained below.

The rotational form-locking contours 70 include a circumferential rotational-form-locking contour 71, which are suitable for engagement, for example, of the form-fitting projection 26. The form-fitting projection 26 forms, for example, a

Rotary positive locking body 75.

The connector 10 can be positively connected and locked with a similar, so to speak compatible connector 10 by the later-described plug-in rotational movement. By way of example, the connection with a connection counterpart 200, which is shown in cross section in FIG. 6, is explained below. The connecting counterpart 200 has, for example, on a circumferential wall 201 delimiting its plug-in receptacle 255 in the plug-in receptacle 255 inwardly projecting rotationally positive counter contours 276, for example cams, projections or the like. On the outer circumference of the plug-in receptacle 255 or on the outer circumference of the peripheral wall 201 further rotational form-fitting counter-contours 275 are provided which, for example, fit into rotationally-conforming contours of a connecting piece configured as grooves.

A respective rotational locking counter contour 276 can be inserted through a longitudinal guide contour 80 in the Umfangsdrehformschlusskontur 71. This happens, for example, when the connection counterpart 200 is plugged onto the connecting piece 10, namely its plug-in portion 50.

The rotational form-fitting counter-contour 276 is designed, for example, as a substantially block-shaped block or bump. However, the functionality of the rotational form-fitting counter-contour 276 is also provided by each of the form-fitting projections 26, wherein the form-fitting projections 26, the rotational-form-locking projections form 75, are even more optimally adapted to the inner contour or positive locking contour of the Umfangsdrehformschlusskontur 71.

The longitudinal guide contour 80 is designed, for example, as a slot or guide channel. The rotational-form-locking contour 75 or the rotational-connection counter-contour 276 can be moved along side walls or side surfaces 81, 82 of the longitudinal guidance contour in the direction of the circumferential rotational-locking contour 71 or out along the longitudinal axis L. The longitudinal guide contour 80 and the circumferential rotational locking contour 71 are, for example, approximately rectangular or hook-shaped relative to each other. The distances between the side walls 81, 82 are preferably so far that the rotational locking contour 75, namely a positive locking projection, with its side surfaces 78, 79 still some play on the side walls or side surfaces 81, 82, but a longitudinal guide in the direction of the longitudinal axis L learns.

A side surface or side wall 72 and one of these opposite side wall or side surface 74 of the Umfangsdrehformschlusskontur 71, which are configured as a groove or slot, preferably run in the direction of an end wall 73, so the end of the Umfangsdrehformschlusskontur 71, toward each other, so that the Umfangsdrehformschlusskontur in the region of the end or the end wall 73 is slightly narrower than at its opening to the longitudinal guide contour 80. As a result, taken between the side surfaces or side walls 72, 74 Drehformschlusskontur 75 or Drehformschlussgegenkontur 276 is taken so to speak in a press fit or fixed at least with respect to the longitudinal axis L stationary.

The rotational positive locking body 75 or the rotary positive locking counter contour 276 are thus introduced into the longitudinal guide contour 80 as part of a plug movement along the longitudinal axis L. A marking 84 or an index facilitates the insertion of the rotary positive locking body 75 or the rotary positive locking counter contour 276. The form-fitting body 75 or the rotational form-fitting counter-contour 276 strike at the end of this insertion movement along the longitudinal axis L at the longitudinal end region 83 of the longitudinal guide contour 80. Subsequently, the connecting piece 10 and the connection counterpart 275 or a complementary, the form-fitting body 75 exhibiting fitting 10 relative to each other to rotate about the longitudinal axis L, wherein the form-fitting body 75 or the Drehformschlussgegenkontur 276 is then rotated into the groove or Umfangsdrehformschlusskontur 71 inside. The rotational movement ends when the positive-fit body 75 or the

Drehformschlussgegenkontur 276 at the Längsendbereich or the end wall 73 of the Umfangsdrehformschlusskontur 71 abuts. This rotary end position is assigned a further mark 85.

The form-fitting surfaces or side surfaces 76, 77 associated with the side walls 72, 74 preferably extend obliquely relative to one another in accordance with the position of the side walls 72, 74, which completes the already mentioned wedge action or clamping when the rotation end position or the rotational form closure is completed is reached, additionally reinforced or improved.

The side surface 76 and the side wall 72 are configured as inclined surfaces 76a, 72a or have inclined surfaces 76a, 72a which, upon a relative rotation of the connection piece 10 with a connection counterpart, for example a similarly designed connection counterpart 10 (see FIG. 2) or the connection counterpart 200, that is, when the two components are rotated about the longitudinal axis L relative to each other, cause axial displacement or displacement of the two components along the longitudinal axis L to each other. The operator therefore only has to turn the connection piece 10 or the connection counterpart in order to displace the two components along the longitudinal axis L relative to one another, in particular to clamp them. It is understood that one of the inclined surfaces 76a or 72a is sufficient for such a shifting effect or a clamping effect. Between the longitudinal guide contour 80 and the peripheral rotary mold closing contour 71 is still a locking contour 86, for example, a rib 87, is provided. If the rotational form-fitting counter-contour 276 or the rotational-locking contour 75 is to be moved out of the longitudinal guide contour 80 into or out of the circumferential rotational-locking contour 71 in the direction of the longitudinal guide contour 80, it must, as it were, be moved past the latching contour 86. Thus, in the direction of rotation or circumferential direction about the longitudinal axis L is given a latching, which ensures the rotational locking.

The rib 87 is preferably made of the softer or more elastic material of the male portion base body 60, so that it is elastically yielding and thus allows the movement of the rotary mold closing contour 75 or the rotary mold closing counter contour 276 past her.

In addition to the longitudinal catch contours 61 already described in the plug-in receptacle 55, longitudinal catch contours are also provided on the outer circumference of the plug-in section, namely longitudinal catch contours 90. The longitudinal catch contours 90 comprise, for example, a circumferential groove 91 which, as it were, crosses the longitudinal guide contours 80. A so-called imaginary curve 92 of the circumferential groove 91 is indicated in FIG. The circumferential groove 91 thus communicates with the longitudinal guide contours 80 (3 longitudinal guide contours 80 are at an angular distance, preferably an equal angular distance, provided to each other), which should not be essential here. In any case, in the radially outer or on the outer circumference of the plug portion 50 provided Längsrastkonturen 90 a latching counter contour, for example in the manner of a rib structure, an annular, radially inwardly into a socket of a connection counterpart protruding latching projection, a hook or the like, are snapped to the connector 10 to connect with the connection counterpart, not shown, so to speak in the pulling direction or longitudinal direction.

In the exemplary embodiment according to FIGS. 5, 6 and 7, it is expediently provided that the plug-in section 50, in particular the outer component 51, is electrically conductive. Thus, for example, static electricity can be derived.

In a special way, however, a relatively hard plastic is suitable to be electrically conductive. Then can be produced in a particularly advantageous manner by the multi-component embodiment of the connector 10 in the embodiment of Figures 1 and 2, the necessary electrical conductivity, namely, if corresponding recesses are provided on the more elastic component or soft component, the components of the harder component, the is electrically conductive, are penetrated. For example, an electrical contact arrangement 30 with electrical contact sections 31, 32 is provided, which protrude radially outward in front of the outer component 51. Also, the rib 87 or latching contour 86 and / or at least one of the form-fitting projections 26 may be configured as an electrically conductive component. 56, further electrical contact surfaces 33 are preferably provided, for example in the area of the rib structure, so that inside the plug receptacle 55, on the one hand, the form-fitting projections 26, on the other hand, these further contact surfaces 33 are available for establishing an electrical connection.

It should be noted that the locking contour 86 or rib 87 may be formed by a relatively hard component of the connector 10, for example, as a projection on one of the stiffening elements 75, which protrudes in front of the outer component 51 may be configured.

It is preferably provided that, in a connection piece according to the invention, a plurality of circumferential rotational form-closure contours and possibly a plurality of longitudinal guide contours communicating therewith are provided. When connecting piece 10 3 such configurations are provided, for example, at a uniform angular distance. In this sense, 3 are arranged at the same angular distance form-fitting projections 26 and Drehformschluss- contours 75 are provided. While the rotational form-locking contours 70 form, so to speak, external rotational-form-locking contours, the rotational-form-locking contours 75 are, so to speak, internal rotational-form-locking contours. Of course, it is possible that, for example, when connecting counterpart 200, which can also be considered as a connector in the context of the invention, both inside and outside in the region of the plug receptacle 255 each Drehformschlusskonturen same kind, namely the cam-like Drehformschlussgegenkonturen 275, 276 are present , In this case too, three inner rotational-form-fitting counter-contours 276 arranged at the same angular distance from one another and outer rotational-form-fit counter-contours 275 are provided in each case.

The connection counterpart 52, however, has around a peripheral wall 278, which limits a plug-in receptacle 255, but does not comprise Drehformschlusskonturen or Drehformschlussgegenkonturen. This is typically also the case with known hand-held machine tools, for example in the variant illustrated in FIG. 16. However, the plug-in section 50 can also be plugged into the plug-in receptacle 255 of the connection counterpart 250 and is in this case compressible, so that it optimally adapts to the inner contour of the plug-in receptacle 255.

In the previous embodiments, the fitting according to the invention has been described as an e.g. shown arranged on the suction hose 100 component. But it can also be part of a vacuum cleaner or a hand-held machine tool, which will become apparent below.

For example, at the free end of a suction hose 100 of a vacuum cleaner 600 according to FIG. 9, a connection piece 10 according to the invention. The suction hose connection 605 of the vacuum cleaner 600, which is arranged, for example, on the front side 602 of its housing 601, can be of a conventional type. For example, the suction hose 100 is attached to the suction hose connection 605. The for connecting with, for example, the

Hand machine tool 700 or 500 provided other connection of the suction hose 100 is provided with the connector 10 (Figure 10) wherein the There existing Drehfornnschlusskonturen 70 and additionally the locking contour 86 ensure optimum hold of the connected hand-held machine tool.

Of course, the connector 10 may also be used e.g. only the connection counterpart 52 are plugged.

But it is also possible that, for example, at the vacuum cleaner 600 instead of the example, only a sleeve or a sleeve having suction hose connection 605, the inventive fitting 10 is provided (Figure 12). This can then be provided, for example, for connecting a connection counterpart 200 or a similar connection piece 10 in order to enable the better hold of the suction hose 100. However, in the exemplary embodiment according to FIG. 12, a suction hose 100 with a connection counterpart 250 is connected to the connection piece 10 of the vacuum cleaner 10.

A manual machine tool 700, for example a grinding machine, has a drive motor 702 for driving a grinding tool 703. During operation of the hand machine tool 700, dust is generated, which is guided through a dust guide channel 704, which passes through the housing 701, in the direction of a dust outlet 705 becomes. At this, for example, has a rib structure such as the connection counterpart 380, a connector 10 according to the invention can be connected, for example, be attached to the dust outlet 705 (Figure 13). Alternatively, however, it is also possible, as shown in FIG. 14, for example, that a connecting piece 707 having a rotationally positive-locking contours 75 is provided. The rotational form-locking contours 75 can, for example, be brought into engagement with the rotational-form-locking contours 70 of a connecting piece 10 according to the invention.

In the hand-held power tool 500 according to FIGS. 15-19, for example, as shown in FIG. 16, a conventional connecting piece may be provided as a connection counterpart 505. Its peripheral wall 506 limits, for example, Example, a plug-in receptacle 507, in which the connection portion 50 of a connector 10 according to the invention can be inserted, see for example Figure 19. For example, drives in the housing 501 of

Hand tool 500 arranged motor 502 a tool 503, for example, a saw blade to.

Alternatively, as shown in FIGS. 15 and 17, it is provided that a connection counterpart 550 at the end of a dust guide channel 504 of FIG

Hand machine tool 500 is arranged. For example, dust, shavings or the like generated during operation of the hand-held power tool 500 flow through the dust-carrying passage 504. On connection counterpart 550, rotationally conforming counter-contours 576 are arranged radially inwards and rotationally conforming contours 575 are arranged radially on the outside on a circumferential wall 577 which delimits a plug-in receptacle. Both when plugging in and when inserting a connecting piece according to the invention, for example, the connecting piece 10, thus Drehformschlussgegenkonturen are provided which ensure a particularly firm hold on train with respect to the longitudinal axis L.

At this point, it should be mentioned that the connection counterpart 550 can consist exclusively of relatively hard plastic and represents a connection piece in the sense of the invention, since it has both radially inward and radially outward at its plug-in section rotationally conforming contours or rotationally conforming counter contours.

In the embodiment of Figure 18 is at the dust outlet of

Hand machine tool 500 a connector 10 arranged, for example, fixed or detachable. This preferably consists of a hard component and a soft component, as explained, and / or has at its plug portion both the longitudinal guide contour and 80 and the rotational form-fitting contours 70, so that a particularly firm grip, for example, the connection counterpart 200 is possible. The peripheral wall 201 may be made of a relatively hard plastic, such as polypropylene. The plug-in section 50 to be inserted into the plug-in receptacle 255 in the interior of the peripheral wall 201, on the other hand, consists of a softer plastic, at least on its outer periphery, whereby a particularly good frictional engagement and, in addition, a high density can be achieved. But it is also quite possible that the peripheral wall 201 is also made of soft plastic, in particular the same plastic material, as the plug portion 50. Furthermore, it is conceivable that the peripheral wall 201 is stiffened by stiffening elements in the nature of the stiffening elements 21. For example, strip-shaped stiffening elements 221 are provided. The stiffening elements 221 an oblique inclination with respect to the longitudinal axis L, so unlike the stiffening elements 21 are not parallel to the longitudinal axis L. The connection counterpart 200 forms both in the configuration with a hard peripheral wall 201, so hard plug portion 250, as well as with soft or with stiffening elements 221 or The stiffening plug 200 may be a component of, for example, the hand-held power tool 500 or 700 or the vacuum cleaner 600, for example, each as a connection for the suction hose form.

Claims

claims

1 . Suction hose fitting (10) for a suction hose (100) for establishing a flow connection in particular from a machine tool to a vacuum cleaner, wherein the fitting (10) comprises a tubular body (1 1) having a peripheral wall defining a flow channel and one on the tubular body (1 1) arranged plug-in portion (50) for producing a plug connection with a connection counterpart, wherein the connecting piece (10) and the connection counterpart are connected to each other, wherein the plug portion (50) consists of a resilient material than the tubular body (1 1) characterized in that at least one rotational-form-locking contour (70) is arranged on the plug-in section (50) for producing a positive-locking connection with a rotationally conforming counter-contour of the connection counterpart, at least one rotational-form-locking contour (70) being connected to the rotational-form-locking counter-contour by a relative rotational movement of the connection piece (10).and the terminal counterpart about a longitudinal axis (L) of the plug portion (50) is engageable or disengageable.

2. Connecting piece according to claim 1, characterized in that the at least one rotational locking contour (70) at least one with respect to the longitudinal axis (L) of the plug portion (50) spirally or angularly, in particular at right angles, extending, in particular designed as a circumferential groove, circumferential rotational locking contour (71 ) and / or a thread and / or bayonet rotational locking contour (70) or at least one form-locking projection, in particular a cam, for screwing into a rotational positive locking counter-contours extending in the circumferential direction about the longitudinal axis (L) of the plug-in section (50).

3. suction hose connector according to claim 1 or 2, characterized in that the at least one rotational locking contour (70) at least one on an inner circumference of the plug portion (50) arranged inside Drehformschlusskontur (70) for a on an outer circumference of the insert eck An outer Drehformschlussgegenkontur arranged and at least one on an outer circumference of the plug portion (50) arranged outer Drehformschlusskontur (70) for a arranged on an inner periphery of the Aufsteck-Anschlussgegenstücks inner Drehformschlussgegenkontur.

4. Connecting piece according to claim 3, characterized in that the at least one inner rotational locking contour (70) and the inner rotational form-fitting counter contour and / or the at least one outer rotational locking contour (70) and the outer rotational form-fitting counter contour are identical in shape.

5. Connecting piece according to one of the preceding claims, characterized in that it comprises at least one latching contour (86) by the relative rotational movement of the connecting piece (10) and the counterpart connection piece about the longitudinal axis (L) of the plug portion (50) and / or a longitudinal movement or sliding movement, in particular parallel to the longitudinal axis (L) of the

Plug section (50) can be brought with a latching counter contour of the connection counterpart in a latching engagement or out of a latching engagement.

6. Connecting piece according to claim 5, characterized in that the at least one latching contour (86) to achieve a spring effect consists of an elastic material and / or on an elastic portion of the connecting piece (10) is arranged and / or that the at least one latching contour ( 86) comprises a transverse to the relative rotational movement extending latching receptacle or a transverse to the relative rotational movement extending latching projection, in particular a rib (87).

7. Connecting piece according to one of the preceding claims, characterized in that the plug portion (50) consists of a softer or more yielding material or a softer material than the plug portion (50) carrying tubular body (1 1).

8. Connecting piece according to one of the preceding claims, characterized in that at least one of the rotational form-locking contours (70) and / or at least one locking contour (86) are resilient and / or arranged on an elastically resilient plug-portion base body or base material of the plug portion (50) are.

9. Connecting piece according to one of the preceding claims, characterized in that at least one of the rotational form-locking contours (70) or at least one latching contour (86) made of a harder material than the plug-in form base body of the rotational form-locking contour (70) or latching contour (86) Plug-in section (50) consists.

10. Connecting piece according to one of the preceding claims, characterized in that at least one positive locking contour, in particular the at least one rotary mold closing contour (70) or the at least one latching contour (86) is provided on a form-fitting body which has a recess (29) suitable for deforming the form-fitting body ), so that the form-fitting body yields upon engagement with the associated mating contour, in particular the rotational form-fitting counter contour or detent counter contour, and / or outside engagement of the mating contour.

1 1. Connecting piece according to one of the preceding claims, characterized in that the Drehformschlusskonturen (70) or the at least one associated therewith detent contour (86) can be brought by the elastic compliance with the Drehformschlussgegenkonturen or a latching counter contour in a latching engagement or out of engagement.

12. Connecting piece according to one of the preceding claims, characterized in that it comprises at least one positive-locking body for forming a Forming contour, in particular the at least one rotational locking contour (70) or a detent contour (86), whose base material is at least partially covered in the region of the positive locking contour with a relative to the base material softer or more elastic or having a higher coefficient of friction material.

13. Connecting piece according to one of the preceding claims, characterized in that there is one, in particular on the tubular body (1 1) fixedly arranged and / or with respect to the longitudinal axis (L) non-displaceable and / or rotatably mounted on the tubular body (1 1), holder (40) for a suction hose (100) and / or it forms part of a suction hose (100) or a vacuum cleaner or a hand-held power tool and / or it forms an adapter for connecting two tubular components, in particular for connecting two suction hoses, and / or that it forms a system component of a system comprising the connector and the connector counterpart.

14. Connecting piece according to one of the preceding claims, characterized in that its softer material has a hardness of 40-100 Shore A, in particular 50-90 Shore A, particularly preferably 60-80 Shore A, and its harder material has a hardness of 30-100 Shore D in particular 30-70 Shore D, particularly preferably 30-60 Shore D, and / or that its less elastic material has a modulus of elasticity of 800-2500 N / mm ² , in particular 1000 to

1800 N / mm ² , and its elastic material has a modulus of elasticity of at most 800 N / mm ² , expediently of not more than 700 N / mm ² , particularly preferably of not more than 600 N / mm ² , and / or that its more resistant to breakage, in particular more yielding, Material has an elongation at break of> 70%, in particular of> 80%, particularly preferably> 100%, and its less fracture-resistant or elastic material has an elongation at break of> 30%, in particular> 40% or> 50% and / or its softer material thermoplastic elastomer comprises or is and / or its harder material comprises or is polypropylene and polyamide and / or its stiffer material or reinforcing material at least 1, 5 times, expediently at least twice or thrice as stiff as its less rigid material, in particular the Base material of the pipe section.

15. Connecting piece according to one of the preceding claims, characterized in that it comprises a first, electrically less conductive material than a second material, wherein the second material protrudes at least partially before the first material for establishing an electrical connection with the connection counterpart or before the first Material is arranged.

16. Connecting piece according to one of the preceding claims, characterized in that on the plug portion (50) a release of the connection counterpart from the connector (10) with respect to the longitudinal axis (L) counteracting longitudinal latching contour (61) is arranged, which upon insertion of the connection counterpart the connection piece (10) passes along the longitudinal axis (L) of the plug-in section (50) into engagement with a longitudinal counter-latching contour of the connection counterpart.

17. Connecting piece according to one of the preceding claims, characterized in that the connecting piece (10) constructed as a multi-component section, a longitudinal axis (L) having, in particular the plug portion (50) forming or comprising, pipe section (35), wherein in a base material of the pipe section (35) forming a first component is embedded as a second component of at least one stiffening element (21) having a longitudinal shape made of a stiffening material which is harder and / or more tensile and / or more resistant to bending and / or has a higher stiffness than the base material.

18. Device with a connector according to one of the preceding claims, wherein the device is a suction hose (100) or a machine tool or a hand-held power tool (700, 500) or a vacuum cleaner (600).