EP0307735B1 - Rotary plug coupling for latching a suction hose with electric conductors to the body of a suction cleaner - Google Patents
Rotary plug coupling for latching a suction hose with electric conductors to the body of a suction cleaner Download PDFInfo
- Publication number
- EP0307735B1 EP0307735B1 EP88114369A EP88114369A EP0307735B1 EP 0307735 B1 EP0307735 B1 EP 0307735B1 EP 88114369 A EP88114369 A EP 88114369A EP 88114369 A EP88114369 A EP 88114369A EP 0307735 B1 EP0307735 B1 EP 0307735B1
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- EP
- European Patent Office
- Prior art keywords
- coupling
- slip rings
- sliding contacts
- carrier
- contact
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/24—Hoses or pipes; Hose or pipe couplings
- A47L9/242—Hose or pipe couplings
- A47L9/246—Hose or pipe couplings with electrical connectors
Definitions
- the invention relates to a rotatable plug-in coupling for connecting a suction hose provided with electrical conductors to a vacuum cleaner housing, in which plug-in coupling provided in or on the suction hose electrical lines via a movable contact arrangement, comprising a plug-in coupling sleeve connected to the suction hose and a coupling receptacle provided on the vacuum cleaner housing arranged slip rings and sliding contacts, are electrically connected to an existing circuit in the vacuum cleaner housing, the slip rings and sliding contacts simultaneously forming the mechanical separation point of the circuit in the plug-in coupling.
- Such a coupling is known from DE-AS 17 28 486.
- two slip rings are arranged at an axial distance on the inner circumference of the clutch receptacle provided on the vacuum cleaner housing.
- it In order to be able to insert the coupling sleeve into the coupling receptacle, it has corresponding grooves which extend in the axial direction and through which the radially projecting contact pins can be pushed as far as the slip rings.
- Such a design of a plug-in coupling has various disadvantages.
- the radially projecting contact pins are constantly exposed to the risk of damage.
- the slip rings located on the inner circumference of the clutch holder can easily get dirty.
- the coupling sleeve of the suction hose can only be inserted into the coupling receptacle in certain positions. Each time a coupling sleeve is inserted into the coupling receptacle, one contact pin slides across the one slip ring, which can cause annoying grooves.
- the axial spacing of the slip rings results in a relatively large axial length of the coupling parts. As a result of this length, when the suction hose is pulled transversely to the longitudinal direction of the coupling, high moment forces occur within the coupling.
- the sliding tracks arranged on the connecting piece are each connected via contact pins to a contact surface provided on the front side of the connecting piece.
- these contact surfaces come into contact with corresponding mating contacts provided in the suction opening and thereby establish the electrical connection.
- the contact surfaces and the mating contacts are connected to one another at rest when the connecting piece is inserted.
- FR-A-2 226 968 relates to a vacuum cleaner in which a suction hose provided with electrical conductors can be rotated by means of a connecting member, but is otherwise fixed to it the vacuum cleaner housing is connected.
- a holding member connected to the suction hose is rotatably arranged in the connecting member.
- the holding member is provided with an annular flange on which contact rings connected to the conductors of the suction hose are arranged radially concentrically. At these contact rings are spring contacts, which are attached to a housing wall of the connecting member and connected to the electrical supply lines.
- the invention has for its object to provide a plug-in coupling of the type described above, which does not have the described disadvantages of the known plug-in coupling and which is characterized by easy assembly.
- the achievement of the object is achieved according to the invention in that the slip rings are arranged concentrically in the radial direction on an annular support which can be plugged onto the outside of an inner tube of the coupling sleeve which can be inserted into the coupling receptacle and can be fixed in position on the inner tube and in that the sliding contacts are arranged axially movable in the coupling receptacle under spring force.
- slip rings are completely removed from the area exposed to dirt.
- the parts of the sliding contact arrangement no longer slide over one another, so that no damage can occur. Even parts protruding beyond the outer contour and thus exposed to danger are not present in the coupling design described.
- the slip rings arranged radially concentrically to one another result in a corresponding reduction in the axial length of the coupling parts.
- the arrangement of the slip rings on the separate ring-shaped carrier makes assembly considerably easier.
- slip rings are inserted in grooves of the carrier which are formed concentrically to one another, results in a very stable and pre possible deformation protective arrangement of the slip rings.
- the slip rings can be held very securely by integrally formed fastening tabs which are inserted and caulked on the side opposite the grinding side through corresponding openings in the carrier.
- the sliding contacts are expediently also arranged on a separate contact carrier.
- the sliding contacts on the contact carrier can be clamped accordingly by a three-point support.
- the sliding contacts are slightly adjusted by the slip rings against the tension on the contact carrier. This is made possible by the freedom of movement in the contact carrier.
- a suction hose 3 is inserted into the coupling receptacle 2 with a coupling sleeve 5 arranged at one end and is rotatably held by a locking device 4 not shown in detail in the drawing, for example by the DE-GM 85 22 551 known.
- the coupling sleeve 5 is angled according to the connection of the suction hose 3 on the top of the vacuum cleaner housing 1.
- the coupling sleeve 5 has an inner tube 6 which opens into a tubular part 7 of the coupling receptacle 2.
- the inner tube 6 is concentrically surrounded by a tube extension 8 which is open towards the end of the inner tube and which engages with its free end in the coupling receptacle 2 which is correspondingly enlarged towards the outside.
- annular space 9 which serves to receive the latching device 4 and a carrier 10 for slip rings 11 and 12 which are inserted into corresponding grooves 13 and 14 of the carrier 10.
- the carrier 10 is pushed onto the inner tube 6 on the outside and is held on the inner tube 6 by a slide 16 provided with claws 15.
- stop ribs on the tube extension 8 are used, which also ensure a minimum play for easy actuation of the locking device 4.
- the carrier 10 is secured against rotation by means of a radially projecting pin 38 which engages in a corresponding slot in the wall of the coupling sleeve 5, which slot is not visible in the drawing. Through this pin 38, the correct positioning of the carrier takes place at the same time with regard to the electrical connection of the slip rings 11 and 12.
- the arrangement of the slip rings 11 and 12 in the grooves 13 and 14 protects them against deformation.
- the assembly of the slip rings 11 and 12 is very simplified because they only need to be inserted into the chamfered grooves 13 and 14.
- the slip rings 11 and 12 are held axially in the grooves 13 and 14 by means of fastening tabs 17 which are inserted into openings 18 provided on the carrier 10 and caulked in these openings 18, as shown in FIG. It is particularly advantageous that the openings 18 flare outwardly.
- the connection Intermediate lines 19 to the slip rings 11 and 12 take place on the side of the slip rings 11 and 12 facing the bottom of the groove.
- cutouts 20 are provided on the carrier, which allow the intermediate lines 19 to pass through (FIG. 3).
- Sliding contacts 21 and 22 cooperating with the slip rings 11 and 12 are arranged on a separate contact carrier 23 which can be connected to the vacuum cleaner housing 1 in the area of the coupling receptacle 2.
- the sliding contacts 21 and 22 consist of S-shaped bent metal strips, at one end 24 of which a feed line 26 is connected. With their other end 25, the sliding contacts 21 and 22 rest against the slip rings 11 and 12 and thus establish the electrical connection.
- the sliding contacts 21 and 22 are shaped so that in their rest position, i.e. when the coupling sleeve 5 is not inserted, are braced by a three-point support.
- This three-point support is by a stop bar 27, on which the sliding contacts 21 and 22 each abut at one end 24, a support bar 28 on which the sliding contacts 21 and 22 rest in the area of their one S-arm and by locking tongues 29, which are elastic Tabs 30 are formed and on which the sliding contacts 21 and 22 abut in the area of their other S-bend.
- a holding cam 27a is formed on each stop bar, which extends through a corresponding opening in one end 24 of the sliding contacts 21 and 22 and thus secures the relevant sliding contact 21 or 22 in the vertical direction.
- a stop tongue 27b is punched on each sliding contact, the free end of which rests laterally on the support strip 28 and thereby secures the respective sliding contact 21 or 22 in the horizontal direction.
- connection box 34 connected to the suction hose 3
- a printed circuit board 35 is inserted, on which the intermediate lines 19 are connected to control lines 36 laid in the jacket of the suction hose 3.
- a line channel 37 for the intermediate lines 19 is formed by a cover 39 which can be snapped onto the locking cams 5 integrally formed on the coupling sleeve 5, so that there are no longer any exposed line parts.
- the cover 39 engages with a locking tab 40 in an insertion opening 41 of the terminal box 34. As a result, the junction box 34 is not only closed, but the intermediate lines 19 are secured against twisting.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electric Vacuum Cleaner (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
Description
Die Erfindung betrifft eine drehbare Steckkupplung für den Anschluß eines mit elektrischen Leitern versehenen Saugschlauches an ein Staubsaugergehäuse, bei welcher Steckkupplung im oder am Saugschlauch vorgesehene elektrische Leitungen über eine bewegliche Kontaktanordnung, die aus an einer mit dem Saugschlauch verbundenen steckbaren Kupplungshülse und einer am Staubsaugergehäuse vorgesehenen Kupplungsaufnahme angeordneten Schleifringen und Schleifkontakten besteht, mit einem im Staubsaugergehäuse vorhandenen Stromkreis elektrisch verbunden sind, wobei die Schleifringe und Schleifkontakte gleichzeitig die mechanische Trennstelle des Stromkreises in der Steckkupplung bilden.The invention relates to a rotatable plug-in coupling for connecting a suction hose provided with electrical conductors to a vacuum cleaner housing, in which plug-in coupling provided in or on the suction hose electrical lines via a movable contact arrangement, comprising a plug-in coupling sleeve connected to the suction hose and a coupling receptacle provided on the vacuum cleaner housing arranged slip rings and sliding contacts, are electrically connected to an existing circuit in the vacuum cleaner housing, the slip rings and sliding contacts simultaneously forming the mechanical separation point of the circuit in the plug-in coupling.
Eine solche Kupplung ist durch die DE-AS 17 28 486 bekannt. Bei dieser Kupplung sind am Innenumfang der am Staubsaugergehäuse vorgesehenen Kupplungsaufnahme zwei Schleifringe in axialem Abstand angeordnet. Am Außenumfang der mit dem Saugschlauch verbundenen Kupplungshülse befinden sich zwei radial vorstehende Kontaktstifte, die als Schleifkontakte dienen. Diese Kontaktstifte sind umfangsmäßig gegeneinander versetzt und in axialer Richtung um das gleiche Maß wie die Schleifringe voneinander beabstandet. Um die Kupplungshülse in die Kupplungsaufnahme einführen zu können weist diese entsprechende, sich in axialer Richtung erstreckende Nuten auf, durch die die radial vorstehenden Kontaktstifte bis zu den Schleifringen hin durchgeschoben werden können.Such a coupling is known from DE-AS 17 28 486. With this clutch, two slip rings are arranged at an axial distance on the inner circumference of the clutch receptacle provided on the vacuum cleaner housing. On the outer circumference of the coupling sleeve connected to the suction hose there are two radially projecting contact pins which serve as sliding contacts. These contact pins are circumferentially offset from one another and spaced apart in the axial direction by the same amount as the slip rings. In order to be able to insert the coupling sleeve into the coupling receptacle, it has corresponding grooves which extend in the axial direction and through which the radially projecting contact pins can be pushed as far as the slip rings.
Eine derartige Ausbildung einer Steckkupplung hat verschiedene Nachteile. Zunächst sind die radial vorstehenden Kontaktstifte ständig der Gefahr einer Beschädigung ausgesetzt. Die am Innenumfang der Kupplungsaufnahme befindlichen Schleifringe können leicht verschmutzt werden. Die Kupplungshülse des Saugschlauches kann nur in bestimmten Stellungen in die Kupplungsaufnahme eingeführt werden. Bei jedem Einstecken einer Kupplungshülse in die Kupplungsaufnahme gleitet der eine Kontaktstift quer über den einen Schleifring, wodurch störende Riefen entstehen können. Durch die axiale Beabstandung der Schleifringe ergibt sich eine relativ große axiale Länge der Kupplungsteile. Infolge dieser Länge treten bei quer zur Längsrichtung der Kupplung wirkendem Zug des Saugschlauches hohe Momentenkräfte innerhalb der Kupplung auf.Such a design of a plug-in coupling has various disadvantages. First of all, the radially projecting contact pins are constantly exposed to the risk of damage. The slip rings located on the inner circumference of the clutch holder can easily get dirty. The coupling sleeve of the suction hose can only be inserted into the coupling receptacle in certain positions. Each time a coupling sleeve is inserted into the coupling receptacle, one contact pin slides across the one slip ring, which can cause annoying grooves. The axial spacing of the slip rings results in a relatively large axial length of the coupling parts. As a result of this length, when the suction hose is pulled transversely to the longitudinal direction of the coupling, high moment forces occur within the coupling.
Durch die US-A-3 339 168 ist eine drehbare, jedoch axial feste Kupplung zwischen einem mit elektrischen Leitern versehenen Saugschlauch und dem in die Saugöffnung eines Staubsaugers einsteckbaren Anschlußstutzen des Saugschlauches bekannt. Innerhalb des Anschlußstutzens sind zwei Schleifbahnen radial kozentrisch zueinander angeordnet, denen an einem mit dem Saugschlauch verbundenen Zwischenstück ebefalls radial konzentrisch angeordnete Schleifringe gegenüber liegen. Die elektrische Verbindung dieser Schleifringe und Schleifbahnen erfolgt über zwischen diesen Elementen eingelegte Wellfederringe. Diese Wellfederringe liegen mit ihren Wellenbögen abwechselnd an den am Anschlußstutzen und dem am Zwischenstück angeordneten Schleifbahnen bzw. Schleifringen an. Die am Anschlußstutzen angeordneten Schleifbahnen sind über Kontaktstifte jeweils mit einer stirnseitig am Anschlußstutzen vorgesehenen Kontaktfläche verbunden. Beim Einstecken des Anschlußstutzens in die Saugöffnung des Staubsaugers kommen diese Kontaktflächen an entsprechenden in der Saugöffnung vorhandenen Gegenkontakten zur Anlage und stellen dadurch die elektrische Verbindung her. Die Kontaktflächen und die Gegenkontakte sind im eingestecken Zustand des Anschlußstutzens ruhend miteinander verbunden.From US-A-3 339 168 a rotatable but axially fixed coupling between a suction hose provided with electrical conductors and the connecting piece of the suction hose which can be inserted into the suction opening of a vacuum cleaner is known. Within the connecting piece, two sliding tracks are arranged radially concentrically with respect to one another, which are also opposed to radially concentrically arranged slip rings on an intermediate piece connected to the suction hose. These slip rings and slideways are electrically connected via corrugated spring washers inserted between these elements. These wave washers alternate with their wave arches on the sliding tracks or slip rings arranged on the connecting piece and on the intermediate piece. The sliding tracks arranged on the connecting piece are each connected via contact pins to a contact surface provided on the front side of the connecting piece. When the connecting piece is inserted into the suction opening of the vacuum cleaner, these contact surfaces come into contact with corresponding mating contacts provided in the suction opening and thereby establish the electrical connection. The contact surfaces and the mating contacts are connected to one another at rest when the connecting piece is inserted.
Die FR-A-2 226 968 bezieht sich auf einen Staubsauger, bei dem ein mit elektrischen Leitern versehener Saugschlauch mittels eines Anschlußgliedes zwar drehbar, jedoch ansonsten fest an das Staubsaugergehäuse angeschlossen ist. In dem Anschlußglied ist ein mit dem Saugschlauch verbundenes Halteglied drehbar angeordnet. Das Halteglied ist mit einem Ringflansch versehen, an dem mit den Leitern des Saugschlauches verbundene Kontaktringe radial konzentrisch angeordnet sind. An diesen Kontaktringen liegen Federkontakte an, die an einer Gehäusewand des Anschlußgliedes befestigt und mit den elektrischen Versorgungsleitungen verbunden sind.FR-A-2 226 968 relates to a vacuum cleaner in which a suction hose provided with electrical conductors can be rotated by means of a connecting member, but is otherwise fixed to it the vacuum cleaner housing is connected. A holding member connected to the suction hose is rotatably arranged in the connecting member. The holding member is provided with an annular flange on which contact rings connected to the conductors of the suction hose are arranged radially concentrically. At these contact rings are spring contacts, which are attached to a housing wall of the connecting member and connected to the electrical supply lines.
Der Erfindung liegt die Aufgabe zugrunde, eine Steckkupplung der eingangs beschriebenen Art zu schaffen, welche die beschriebenen Nachteile der bekannten Steckkupplung nicht aufweist und die sich durch eine leichte Montierbarkeit auszeichnet.The invention has for its object to provide a plug-in coupling of the type described above, which does not have the described disadvantages of the known plug-in coupling and which is characterized by easy assembly.
Die Lösung der gestellten Aufgabe gelingt nach der Erfindung dadurch, daß die Schleifringe in radialer Richtung konzentrisch an einem ringförmigen Träger angeordnet sind, der außen auf ein in die Kupplungsaufnahme einsteckbaren Innenrohr der Kupplungshülse aufsteckbar und in seiner Lage an dem Innenrohr fixierbar ist und daß die Schleifkontakte in der Kupplungsaufnahme unter Federkraft axial beweglich angeordnet sind.The achievement of the object is achieved according to the invention in that the slip rings are arranged concentrically in the radial direction on an annular support which can be plugged onto the outside of an inner tube of the coupling sleeve which can be inserted into the coupling receptacle and can be fixed in position on the inner tube and in that the sliding contacts are arranged axially movable in the coupling receptacle under spring force.
Die Schleifringe sind dabei vollkommen aus dem durch Schmutz beaufschlagbaren Bereich herausgenommen. Beim Zusammenstecken der Kupplung gleiten die Teile der Schleifkontaktanordnung nicht mehr übereinander, so daß auch keine Beschädigungen auftreten können. Auch über die Außenkontur vorstehende und damit einer Gefährdung ausgesetzte Teile sind bei der beschriebenen Ausbildung der Kupplung nicht vorhanden. Durch die radial konzentrisch zueinander angeordneten Schleifringe ergibt sich eine entsprechende Verkürzung der axialen Baulänge der Kupplungsteile. Die Anordnung der Schleifringe an dem gesonderten ringförmigen Träger erleichtert die Montage wesentlich.The slip rings are completely removed from the area exposed to dirt. When the coupling is plugged together, the parts of the sliding contact arrangement no longer slide over one another, so that no damage can occur. Even parts protruding beyond the outer contour and thus exposed to danger are not present in the coupling design described. The slip rings arranged radially concentrically to one another result in a corresponding reduction in the axial length of the coupling parts. The arrangement of the slip rings on the separate ring-shaped carrier makes assembly considerably easier.
Dadurch, daß die Schleifringe in konzentrisch zueinander ausgebildeten Nuten des Trägers eingesetzt sind, ergibt sich eine sehr stabile und vor eventuellen Verformungen schützende Anordnung der Schleifringe. In solchen Nuten können die Schleifringe durch angeformte Befestigungslaschen, die auf der der Schleifseite gegenüberliegenden Seite durch entsprechende Öffnungen des Trägers hindurchgesteckt und verstemmt sind, sehr sicher gehalten werden.The fact that the slip rings are inserted in grooves of the carrier which are formed concentrically to one another, results in a very stable and pre possible deformation protective arrangement of the slip rings. In such grooves, the slip rings can be held very securely by integrally formed fastening tabs which are inserted and caulked on the side opposite the grinding side through corresponding openings in the carrier.
Die Schleifkontakte wiederum werden zweckmäßigerweise ebenfalls an einem gesonderten Kontaktträger angeordnet. Dabei können die Schleifkontakte an dem Kontaktträger durch eine Dreipunktauflage entsprechend verspannt werden. Zur Erzeugung des notwendigen Anlagedruckes der Schleifkontakte an den Schleifringen werden die Schleifkontakte durch die Schleifringe gegen die Verspannung am Kontaktträger etwas verstellt. Dies wird durch den im Kontaktträger vorhandenen Bewegungsfreiraum ermöglicht.In turn, the sliding contacts are expediently also arranged on a separate contact carrier. The sliding contacts on the contact carrier can be clamped accordingly by a three-point support. To generate the necessary contact pressure of the sliding contacts on the slip rings, the sliding contacts are slightly adjusted by the slip rings against the tension on the contact carrier. This is made possible by the freedom of movement in the contact carrier.
Anhand eines in der Zeichnung dargestellten Ausführungsbeispieles wird der Anmeldungsgegenstand nachfolgend näher beschrieben. Es zeigt:
- FIG 1
- eine vollständige Kupplung im Schnitt,
- FIG 2
- eine Draufsicht eines Kontaktträgers für die Schleifkontakte,
- FIG 3
- eine Draufsicht eines Kontaktträgers für die Schleifringe,
- FIG 4
- einen Schnitt entlang der Linie IV-IV in FIG 3.
- FIG. 1
- a complete clutch in section,
- FIG 2
- a plan view of a contact carrier for the sliding contacts,
- FIG 3
- a plan view of a contact carrier for the slip rings,
- FIG 4
- a section along the line IV-IV in Figure 3.
Mit 1 ist ein angedeutetes Staubsaugergehäuse bezeichnet, an dem eine den Saugeinlaß bildende Kupplungsaufnahme 2 vorgesehen ist. Ein Saugschlauch 3 ist mit einer an seinem einen Ende angeordneten Kupplungshülse 5 in die Kupplungsaufnahme 2 eingesteckt und wird durch eine in der Zeichnung nicht im Detail dargestellte, beispielsweise durch das DE-GM 85 22 551 bekannte Rasteinrichtung 4, verdrehbar gehalten.1 with an indicated vacuum cleaner housing is designated, on which a
Die Kupplungshülse 5 ist entsprechend dem Anschluß des Saugschlauches 3 auf der Oberseite des Staubsaugergehäuses 1 abgewinkelt ausgebildet. An ihrem in die Kupplungsaufnahme 2 einführbaren Ende weist die Kupplungshülse 5 ein Innenrohr 6 auf, das in einen rohrförmigen Teil 7 der Kupplungsaufnahme 2 mündet. Das Innenrohr 6 ist von einem zum Ende des Innenrohres hin offenen Rohransatz 8 konzentisch umgeben, der mit seinem freien Ende in die nach außen entsprechend erweiterte Kupplungsaufnahme 2 eingreift. Zwischen dem Innenrohr 6 und dem Rohransatz 8 besteht ein Ringraum 9, der zur Aufnahme der Rasteinrichtung 4 und eines Trägers 10 für Schleifringe 11 und 12 dient, die in entsprechende Nuten 13 und 14 des Trägers 10 eingesetzt sind. Der Träger 10 ist außen auf das Innenrohr 6 aufgeschoben und wird durch einen mit Krallen 15 versehenen Schieber 16 auf dem Innenrohr 6 gehalten. Zur weiteren Lagefixierung des Trägers 10 dienen Anschlagrippen am Rohransatz 8, die außerdem ein Mindestspiel zur leichten Betätigung der Rasteinrichtung 4 sicherstellen. Mittels eines radial vorstehenden Zapfens 38, der in einen entsprechenden, in der Zeichnung nicht sichtbaren Schlitz in der Wand der Kupplungshülse 5 eingreift, ist der Träger 10 gegen Verdrehen gesichert. Durch diesen Zapfen 38 erfolgt auch gleichzeitig die richtige Positionierung des Trägers im Hinblick auf den elektrischen Anschluß der Schleifringe 11 und 12.The coupling sleeve 5 is angled according to the connection of the suction hose 3 on the top of the vacuum cleaner housing 1. At its end which can be inserted into the
Durch die Anordnung der Schleifringe 11 und 12 in den Nuten 13 und 14 sind diese gegen Verformungen geschützt. Außerdem ist die Montage der Schleifringe 11 und 12 dadurch sehr vereinfacht, da diese lediglich in die angefasten Nuten 13 und 14 eingeschoben werden brauchen. Die axiale Halterung der Schleifringe 11 und 12 in den Nuten 13 und 14 erfolgt mittels Befestigungslaschen 17, die in am Träger 10 vorgesehene Öffnungen 18 eingesteckt und in diesen Öffnungen 18 verstemmt sind, wie dies die FIG 4 zeigt. Dabei ist es besonders vorteilhaft, daß sich die Öffnungen 18 nach außen hin konisch erweitern. Der Anschluß von Zwischenleitungen 19 an die Schleifringe 11 und 12 erfolgt auf der dem Nutgrund zugewandten Seite der Schleifringe 11 und 12. Hierzu sind an dem Träger 10 Aussparungen 20 vorhanden, die den Durchtritt der Zwischenleitungen 19 gestatten (FIG 3).The arrangement of the slip rings 11 and 12 in the
Mit den Schleifringen 11 und 12 zusammenwirkende Schleifkontakte 21 und 22 sind an einem gesonderten, mit dem Staubsaugergehäuse 1 im Bereich der Kupplungsaufnahme 2 verbindbaren Kontaktträger 23 angeordnet. Die Schleifkontakte 21 und 22 bestehen aus S-förmig gebogenen Metallstreifen, an deren einem Ende 24 eine Zuführleitung 26 angeschlossen ist. Mit ihrem anderen Ende 25 liegen die Schleifkontakte 21 und 22 an den Schleifringen 11 und 12 federnd an und stellen somit die elektrische Verbindung her.Sliding
Die Schleifkontakte 21 und 22 sind so geformt, daß sie in ihrer Ruhelage, d.h. bei nicht eingesteckter Kupplungshülse 5, durch eine Dreipunktauflage verspannt sind. Diese Dreipunktauflage wird durch eine Anschlagleiste 27, an der die Schleifkontakte 21 und 22 jeweils mit ihrem einen Ende 24 anliegen, eine Stützleiste 28, auf der die Schleifkontakte 21 und 22 im Bereich ihres einen S-Bogens aufliegen und durch Rastzungen 29, die an elastischen Laschen 30 angeformt sind und an denen die Schleifkontakte 21 und 22 im Bereich ihres anderen S-Bogens anliegen, gebildet. An jeder Anschlagleiste ist jeweils eine Haltenocke 27a angeformt, die durch eine entsprechende Öffnung in dem einen Ende 24 der Schleifkontakte 21 und 22 hindurchgreift und somit den betreffenden Schleifkontakt 21 bzw.22 in senkrechter Richtung sichert. Ferner ist an jedem Schleifkontakt noch eine Anschlagzunge 27b angestanzt, die mit ihrem freien Ende seitlich an der Stützleiste 28 anliegt und dadurch den jeweiligen Schleifkontakt 21 bzw.22 in waagrechter Richtung sichert.The sliding
Unterhalb des anderen S-Bogens ist an dem Kontaktträger 23 ein Bewegungsfreiraum 31 vorhanden, so daß die Schleifkontakte 21 und 22 beim Einstecken der Kupplungshülse 5 in die Kupplungsaufnahme 2 aus ihrer Ruhelage, in der sie mit ihrem anderen S-Bogen durch die Verspannung an den Rastzungen 29 der Laschen 30 anliegen entsprechend ausweichen können. Durch die Verspannung wird dabei ein ausreichender Kontaktdruck erzeugt, der die Schleifkontakte 21 und 22 in Anlage an den Schleifringen 11 und 12 hält. Die Laschen 30 sind durch Einschnitte 32 in den Seitenwänden 33 des Bewegungsfreiraumes 31 gebildet.Below the other S-bend, there is a
In einem mit dem Saugschlauch 3 verbundenen Anschlußkasten 34 ist eine Leiterplatte 35 eingesetzt, an der die Zwischenleitungen 19 mit im Mantel des Saugschlauches 3 verlegten Steuerleitungen 36 verbunden sind. Durch eine auf an der Kupplungshülse 5 angeformte Rastnocken aufschnappbare Abdeckung 39 wird ein Leitungskanal 37 für die Zwischenleitungen 19 gebildet, so daß keine freiliegenden Leitungsteile mehr vorhanden sind. Die Abdeckung 39 greift mit einer Verschlußlasche 40 in eine Einführöffnung 41 des Anschlußkastens 34 ein. Hierdurch wird der Anschlußkasten 34 nicht nur verschlossen, sondern die Zwischenleitungen 19 gegen Verdrehen gesichert.In a
Claims (6)
- Rotatable plug-in coupling for the connection of a suction hose provided with electrical conductors to a vacuum cleaner housing, in which coupling electrical lines (36) provided in or on the suction hose (3) are electrically connected with an electric circuit present in the vacuum cleaner housing (1) by way of a rotatably movable contact arrangement consisting of slip rings (11, 12) and sliding contacts (21, 22) arranged on a pluggable coupling sleeve (5) connected with the suction hose (3) and a coupling receiver (2) provided on the vacuum cleaner housing (1), the slip rings (11, 12) and sliding contacts (21, 22) simultaneously forming the mechanical point of separation of the electric circuit in the plug-in coupling, characterised in that the slip rings (11 and 12) are arranged in the radial direction concentrically on an annular carrier (10) which can be plugged onto the outside of an inner tube (6) of the coupling sleeve (5), which tube can be plugged into the coupling receiver (2), and can be fixed in its position on the inner tube (6) and in that the sliding contacts (21 and 22) are arranged so as to be axially movable in the coupling receiver (2) under spring force.
- Coupling according to claim 1, characterised in that the slip rings (11 and 12) are inserted into grooves (13 and 14) which are formed on the carrier (10) so as to be concentric to each other.
- Coupling according to claim 1 or 2, characterised in that the slip rings (11 and 12) are held by caulking securing lugs (17) which are preformed on the side lying opposite their slip side and project through corresponding openings (18) of the carrier (10).
- Coupling according to one or several of the preceding claims, characterised in that the sliding contacts (21 and 22) are arranged on a separate contact carrier (23) which can be attached to the vacuum cleaner housing (1) in the area of the coupling receiver (2).
- Coupling according to claim 4, characterised in that the sliding contacts (21 and 22) consist of an elastic material and are braced in their rest position by means of a three-point bearing (27, 28, 29) in the direction of contact in relation to the slip rings (11 and 12) and in that a free space for movement (31) for the sliding contacts (21 and 22) is formed on the contact carrier (23) in the opposite direction to the bracing.
- Coupling according to claim 5, characterised in that an elastic lug (30) is formed at least on one side wall (33) of the free space for movement (31) by means of incisions (32) and pre-formed on the free end of said lug there is a stop tongue (29) which suitably overlaps the portion of the sliding contact (21 or 22) arranged in the free space for movement.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE8712478U | 1987-09-15 | ||
| DE8712478U DE8712478U1 (en) | 1987-09-15 | 1987-09-15 | Rotatable coupling for connecting a suction hose equipped with electrical conductors to a vacuum cleaner housing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0307735A1 EP0307735A1 (en) | 1989-03-22 |
| EP0307735B1 true EP0307735B1 (en) | 1992-03-04 |
Family
ID=6812097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP88114369A Expired - Lifetime EP0307735B1 (en) | 1987-09-15 | 1988-09-02 | Rotary plug coupling for latching a suction hose with electric conductors to the body of a suction cleaner |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0307735B1 (en) |
| DE (2) | DE8712478U1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH074336B2 (en) * | 1989-06-30 | 1995-01-25 | 株式会社日立製作所 | Vacuum cleaner |
| DE3941767A1 (en) * | 1989-12-18 | 1991-06-20 | Mauz & Pfeiffer Progress | DEVICE FOR HOLDING AN ELECTRICAL LINE TO A VACUUM CLEANER PIPE AND / OR HOSE |
| DE9102009U1 (en) * | 1991-02-20 | 1992-06-17 | Siemens AG, 8000 München | Rotatable plug-in coupling for connecting a suction hose equipped with electrical conductors to a vacuum cleaner housing |
| CN1124821C (en) * | 1995-10-30 | 2003-10-22 | 皇家菲利浦电子有限公司 | Vacuum-cleaner-hose assembly having swivel bend and vacuum cleaner comprising such assembly |
| DE19802508A1 (en) * | 1998-01-23 | 1999-07-29 | Stein & Co Gmbh | Device for the detachable coupling of a suction hose connection of vacuum cleaners |
| EP4257024A1 (en) * | 2022-04-07 | 2023-10-11 | Wetrok AG | Handheld soil working implement, supply unit for a handheld soil working implement, method for manufacturing a handheld soil working implement and method for cleaning soil with a handheld soil working implement |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3339168A (en) * | 1965-01-04 | 1967-08-29 | Electrolux Corp | Airflow-electric coupling for vacuum cleaner |
| CH478559A (en) * | 1965-06-28 | 1969-09-30 | Cons Foods Corp | Hose connection coupling with electrical contact device for vacuum cleaners |
| JPS49135458A (en) * | 1973-04-28 | 1974-12-26 |
-
1987
- 1987-09-15 DE DE8712478U patent/DE8712478U1/en not_active Expired
-
1988
- 1988-09-02 DE DE8888114369T patent/DE3868804D1/en not_active Expired - Fee Related
- 1988-09-02 EP EP88114369A patent/EP0307735B1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE8712478U1 (en) | 1989-01-12 |
| EP0307735A1 (en) | 1989-03-22 |
| DE3868804D1 (en) | 1992-04-09 |
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