EP2449934B1 - Suction nozzle assembly for a floor vacuum cleaner - Google Patents

Suction nozzle assembly for a floor vacuum cleaner Download PDF

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Publication number
EP2449934B1
EP2449934B1 EP11186312.2A EP11186312A EP2449934B1 EP 2449934 B1 EP2449934 B1 EP 2449934B1 EP 11186312 A EP11186312 A EP 11186312A EP 2449934 B1 EP2449934 B1 EP 2449934B1
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EP
European Patent Office
Prior art keywords
suction
suction nozzle
joint
transverse axis
axis
Prior art date
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Application number
EP11186312.2A
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German (de)
French (fr)
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EP2449934A3 (en
EP2449934A2 (en
Inventor
Benedikt Bach
Alexander Flegler
Christian Fromm
Thomas GÖPPNER
Carsten Hauptlorenz
Joachim Klemm
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BSH Hausgeraete GmbH
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BSH Hausgeraete GmbH
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Application filed by BSH Hausgeraete GmbH filed Critical BSH Hausgeraete GmbH
Publication of EP2449934A2 publication Critical patent/EP2449934A2/en
Publication of EP2449934A3 publication Critical patent/EP2449934A3/en
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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/02—Nozzles
    • 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
    • A47L5/00—Structural features of suction cleaners
    • A47L5/12—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum
    • A47L5/22—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum with rotary fans
    • A47L5/36—Suction cleaners with hose between nozzle and casing; Suction cleaners for fixing on staircases; Suction cleaners for carrying on the back
    • A47L5/362—Suction cleaners with hose between nozzle and casing; Suction cleaners for fixing on staircases; Suction cleaners for carrying on the back of the horizontal type, e.g. canister or sledge type

Definitions

  • the invention relates to a suction nozzle arrangement for a floor vacuum cleaner, with a suction nozzle with a suction mouth, which has a front and a rear suction edge, the suction nozzle being pivotable in a connecting part in a first joint about a front, horizontal transverse axis, further comprising a suction pipe socket, which is pivotally connected to the connecting part about a second joint with a rear, horizontal transverse axis.
  • the invention further relates to a vacuum cleaner equipped therewith.
  • a suction nozzle arrangement of the type mentioned is from the utility model DE 20 2009 010 089 U1 known.
  • the suction nozzle arrangement described there consists of a suction nozzle with a transversely extending suction mouth which can be connected to a vacuum source and is guided over the surface to be cleaned during floor cleaning.
  • the nozzle sole of the suction nozzle lies directly on the floor.
  • the suction nozzle is usually also equipped with extendable brushes which raise the nozzle sole in the use position so that the suction brush slides on the projecting brush ends.
  • thread catchers are also provided on the nozzle sole.
  • the suction nozzle is mounted in a connecting part in a first joint so as to be pivotable about a front horizontal transverse axis in such a way that it consists of a parallel to the floor can be raised within an angle specified by end stops.
  • a second joint with a horizontal transverse axis, which enables the connecting part to tilt relative to the suction pipe.
  • This double-joint arrangement compensates for unevenness in the floor and an inclined position of the connecting part, and ensures that the nozzle sole always lies comfortably on the floor.
  • the axis of rotation of a pair of rollers, which supports the rear part of the connecting part on the floor also runs in the region of the second joint. This training is intended to counteract an uncontrolled tilting of the suction nozzle during forward and backward movement.
  • the first joint which enables the tilting movement of the suction nozzle in the connecting part and runs through the flow channel, is raised by at least 35 mm with respect to the suction nozzle sole, the suction nozzle being tiltable forward by an angle of at most 15 ° with respect to the rest position until a first stop position is reached. To the rear, the tilt angle is limited by approximately 10 ° by reaching a second stop position.
  • the front transverse axis of the first joint and the rear transverse axis of the second joint are in turn horizontally spaced in a range from 80 mm to 130 mm, in particular 90 mm to 110 mm. This design should also prevent the suction nozzle from tilting.
  • suction nozzle arranged displaceably in a connecting part is described in the European patent application EP 1 180 340 A2 disclosed.
  • the suction nozzle is vertically displaceably mounted in the connecting part by means of a linear guide and is prestressed in the direction of the base by a coil spring.
  • Suction nozzle arrangements of the type described above have basically proven themselves in practice. However, considerable forces may be required to move the suction nozzle, which reduce the ease of use of the vacuum cleaner.
  • the performance characteristics of vacuum cleaners for domestic use are determined according to the standard DIN EN 60312, for example with regard to the dust absorption capacity (chapter 2.2.3) and the resistance to movement when the suction nozzle is moved in the forward and backward direction (chapter 4.1). These properties are therefore of particular importance both for a standard-compliant design of the vacuum cleaner and for pleasant and effective handling. They are influenced by a large number of geometric and fluidic factors, which must be coordinated to achieve a satisfactory result. In this case, a measure to improve a utility property can certainly lead to a deterioration in another utility property.
  • a specially designed suction nozzle is from the published patent application DE 10 2007 009 958 A1 known.
  • the underside of the suction nozzle which is designed as a sheet metal sliding sole, has one transversely running suction mouth with on both sides of its long sides parallel to the floor support surfaces on which the suction nozzle slides when cleaning carpets.
  • the width of the contact surfaces in this embodiment is between 0.5 mm to 4 mm, preferably between 1 mm and 2 mm.
  • the sheet metal sliding sole is equipped with angled sliding surfaces which each enclose an angle of 30 ° to 60 ° when cleaning with the floor.
  • the areas of the sheet metal sliding sole assigned to the suction mouth, which form the front wall and the rear wall of the suction mouth, are bent approximately vertically upwards at an angle of 120 ° to 150 ° and each run with a radius between 0.3 mm and 2 mm, in particular between 0.5 mm and 1 mm into the assigned contact surface.
  • the geometry proposed in this publication can be improved with a view to a particularly high and uniform suction power with a pleasant pushing force.
  • a suction nozzle with a front and a rear suction mouth which are fluidly connected to a common mouth.
  • This suction nozzle is also equipped with sliding surfaces, a first, front sliding surface from the front to the rear falling at an angle of 4 ° to 8 ° to the front suction mouth, a second, middle sliding surface from the front to the rear by 0.5 to 1, 5 mm sloping between the front and rear suction mouth and a third, rear guide surface from front to back with an angle of 1 ° and 5 ° rising behind the rear suction mouth.
  • the utility model DE 29 619 645 U1 discloses a vacuum cleaner with suction head and operating rod, wherein a swivel joint is arranged between the suction head and operating rod. It is stated that the swivel angle of the swivel joint is usually approximately 30 °.
  • US 2007/0 067 949 A1 discloses a vacuum cleaner with a nozzle body, in which the actual nozzle is arranged pivotably about a joint.
  • the suction nozzle is curved at its lateral outlets to the front of the suction nozzle.
  • a straight line running from the joint axis to the front edge of the suction nozzle closes with a vertical line according to FIG Figure 2 an angle of about 55 °.
  • DE 89 01 995 U1 directed.
  • the disclosure DE 36 18 803 A1 discloses a nozzle housing with 2 wheels arranged thereon. Such a housing is also from the published patent application DE 10 2008 012 889 A1 known. Further on the disclosure DE 10 2007 057 349 A1 pointed.
  • EP 1 967 114 A2 referenced similar to that DE 2006 031 486 A1 discloses a double-articulated nozzle for a vacuum cleaner with a suction mouth, which has a front and a rear suction edge, the suction nozzle being pivotable in a connecting part in a first joint about a front, horizontal transverse axis, furthermore having a suction pipe socket which connects with the connecting part around a second Joint is pivotally connected to a rear, horizontal transverse axis, and with at least one roller which is rotatably mounted on the connecting part about a first axis of rotation and is arranged offset to the rear relative to the first joint, and wherein the longitudinal axis of the intake manifold socket with a vertical has a rear articulation angle between Includes 105 ° and 115 °.
  • the invention has for its object to further develop a generic suction nozzle arrangement with a view to reducing the resistance to movement without impairing the dust absorption capacity.
  • the object underlying the invention is in a suction nozzle assembly for a vacuum cleaner, with a suction nozzle with a suction mouth, which is a front and has a rear suction edge, the suction nozzle being pivotable in a connecting part in a first joint about a front, horizontal transverse axis, further having a suction pipe socket which is pivotably connected to the connecting part about a second joint with a rear, horizontal transverse axis, and with At least one roller, which is rotatably mounted on the connecting part about a first axis of rotation and is arranged offset to the rear relative to the first joint, is solved in that the longitudinal axis of the intake manifold socket includes a rear articulation angle between 105 ° and 115 ° with a vertical.
  • the intake manifold socket is intended for the connection of an intake manifold.
  • the first and second joints can be pivoted about their respective transverse axis, that is to say the front and rear transverse axes.
  • Transverse axis here means that the axis in the intended operation of the suction nozzle arrangement runs essentially parallel to the floor, over which the suction nozzle of the suction nozzle arrangement slides.
  • the "front” joint is that of the two joints which is further away from the intake manifold socket, and the "rear” joint is accordingly the joint that is closer to the intake manifold socket.
  • the "vertical” stands orthogonally on a straight line lying from below on the front and rear suction edge and on the side of the roller close to the ground, which is referred to below as "horizontal".
  • the vertical runs perpendicular to an unyielding floor covering over which the suction nozzle of the suction nozzle arrangement slides.
  • the horizontal can be slightly offset and / or inclined relative to the floor by immersing the suction nozzle.
  • the front articulation angle which includes a straight line connecting the front suction edge of the suction mouth and the front transverse axis of the first joint, with a vertical running downwards through the front transverse axis, between 55 ° and 75 °, particularly preferably between 60 ° and is 70 °.
  • the front articulation angle is particularly preferably approximately 65 °.
  • the front suction edge of the suction mouth is its edge facing away from the front transverse axis.
  • the inventors have found that with the rear articulation angle according to the invention, with good dust absorption, the pushing force which is required to move the suction nozzle arrangement over the floor, i.e. to move on the floor in a direction parallel to the machined floor.
  • the flow of force from the intake manifold in the direction of the suction mouth in particular when moving in the forward direction, neither leads to the suction nozzle digging into a flexible floor covering nor to an unwanted lifting of the suction mouth, but rather the nozzle sole in a position which is favorable in terms of the frictional force and dust absorption aligns relative to the ground.
  • the immersion depth can be 2 mm with common carpets.
  • the task of the sliding wheels which are preferably arranged on both sides of the flow channel, is to guide the suction nozzle horizontally to the floor surface when moving in the forward direction in order to prevent the suction nozzle from tipping over. Due to the distance according to the invention, the sliding wheel only comes into contact with the ground when the suction nozzle is immersed in the resilient floor covering by a predetermined amount, but does not increase the resistance to movement when the sliding roller is not in use. In addition, this arrangement leads to particularly good dust absorption when cleaning carpets.
  • a canister vacuum cleaner with such a suction nozzle arrangement is also suitable for achieving the object according to the invention.
  • the rear articulation angle according to the invention is between 105 ° and 115 °.
  • the inventors have found that with this design a particularly good ratio between dust pick-up and the pushing force required to move the suction nozzle arrangement over the floor can be achieved.
  • a particularly low resistance to movement of the suction nozzle arrangement can be achieved when slicing.
  • the rear articulation angle ( ⁇ ) is particularly preferably approximately 110 °. It is an achievable advantage of the front articulation angle according to the invention that, with good dust absorption, the pushing force which is required to move the suction nozzle arrangement over the floor can be reduced.
  • the cumulative articulation angle is between 170 ° and 180 °, particularly preferably between 173 ° and 177 °.
  • the cumulative articulation angle is particularly preferably approximately 175 °.
  • the axis of rotation of the roller and the rear transverse axis of the second joint preferably lie on a common vertical.
  • the axis of rotation of the roller is vertically above or below the rear transverse axis.
  • the connecting part can advantageously be supported by the roller in such a way that a particularly favorable introduction of force from the intake manifold nozzle into the second joint and from there into the first joint takes place.
  • the axis of rotation of the roller (s) coincides with the rear transverse axis of the second joint. This can in particular simplify the construction of the suction nozzle arrangement according to the invention, since components of the axis of rotation can also be used to form the second joint.
  • the diameter of the rollers is advantageously less than 75 mm, in particular between 40 mm and 60 mm, and with particular advantage approximately 50 mm.
  • the first axis of rotation is thus less than 37.5 mm from an (unyielding) floor and is particularly preferably 25 mm vertically spaced from this. This dimensioning means that the advantageous articulation angles can be combined with a restriction of the longitudinal extent of the nozzle housing. An increase in the roller diameter beyond the specified range would in principle be feasible, but would lead to an unusually long suction nozzle arrangement.
  • the preferred sliding wheel is arranged in the horizontal direction between the first joint and the second joint of the connecting part. This enables a particularly favorable alignment of the suction nozzle parallel to the floor.
  • the horizontal distance between the front transverse axis and the rear transverse axis i.e. the shortest distance measured in one direction of a horizontal between these two axes is preferably between 80 and 90 mm, particularly preferably between 82 and 86 mm, particularly preferably approximately 84.5 mm.
  • the present invention is particularly suitable for use in suction nozzles with a metal sole.
  • a metal sole consists partly or even completely of metal, particularly preferably steel.
  • a metal sole can be more resistant and therefore more durable than, for example, a plastic sole. Due to its weight, it can also contribute to an improvement in contact with the ground and thus a further improvement in dust absorption. It can also give the suction nozzle a higher quality appearance.
  • All direction and location information relate to a suction nozzle, which rests on a horizontal surface and is moved in the forward direction, that is to say in the horizontal direction, counter to the longitudinal extent of an intake pipe socket connected to the suction nozzle.
  • the suction nozzle arrangement 1 shown consists of a connecting part 2, which is usually injection molded as a complex component made of plastic.
  • a suction nozzle 3 is arranged in the front area of the connecting part 2 and is mounted in the connecting part 2 so as to be pivotable about a front horizontal transverse axis 5 via a first joint 4.
  • the housing of the suction nozzle is not shown for reasons of clarity.
  • the suction nozzle 3 has a slidable nozzle sole 6, which is guided directly over the floor surface when cleaning a resilient floor covering.
  • the nozzle sole 6 is pierced by a transversely extending suction mouth 7, which is in flow connection with the vacuum source of the cylinder vacuum cleaner and picks up the dust from the floor.
  • a circular arc to the rear Cantilever pipe bend 8 is provided, which is telescopically displaceable and sealed in a complementarily shaped flow channel of the connecting part 2.
  • the curvature of the pipe bend 8 and the assigned area of the flow channel is carried out equidistant from the front transverse axis 5.
  • the suction mouth 7 is delimited by an approximately vertical front wall 9 and an approximately vertical rear wall 10, which form a front suction edge 11 and a rear suction edge 12 in the transition to the nozzle sole 6.
  • an imaginary straight line G 1 is drawn in a side view, which includes a front articulation angle ⁇ of 65 ° with a vertical V pointing downward from the transverse axis 5.
  • a second joint 13 is provided, via which the connecting part 2 is rotatably connected to the intake manifold connector 14 about a rear horizontal transverse axis for connecting an intake manifold.
  • rollers 15 are arranged on the connecting part 2, which can be rotated about a transverse, horizontal first axis of rotation 16 ′ and support the connecting part 2 in the rear region on the floor.
  • the rollers 15 have a diameter D of 50 mm, so that the axis of rotation 16 'has a vertical distance H of 25 mm from the floor.
  • the longitudinal axis G 2 of the intake manifold 14 includes with the vertical V a rear articulation angle ⁇ of 110 °.
  • the selected cumulative articulation angle ⁇ of 175 ° has the effect that the flow of force from the intake manifold 14 in the direction of the suction mouth 7, in particular when moving in the forward direction, neither leads to the suction nozzle 3 digging into a flexible floor covering nor to an undesired lifting of the suction mouth 7, but instead the nozzle sole 6 in a with regard to the frictional force and dust absorption aligns favorable position relative to the ground.
  • the front articulation angle ⁇ of 65 ° is particularly favorable with a view to gently deflecting the air flow into the flow duct and the associated avoidance of pneumatic power losses, which improves the dust pick-up with a given amount of suction air.
  • sliding wheels 17 are mounted on the connecting part 2 so as to be rotatable about a second axis of rotation 18 which also runs transversely and horizontally. More precisely, the sliding wheels are mounted in the suction nozzle housing (not shown for reasons of clarity).
  • the second axis of rotation 18 is arranged approximately centrally between the first axis of rotation 16 'and the transverse axis 5 such that the sliding wheels 17 are raised in the rest position by a distance h of 1.25 mm from the ground. When vacuuming hard floors, the sliding wheels 17 do not come into contact with the floor surface.
  • the nozzle sole 6 penetrates into the floor covering due to the negative pressure. This leads to a lowering of the connecting part 2 and thus to a seating of the sliding wheels 17 on the floor surface. This counteracts a further tilting, which would cause a significant increase in resistance to movement.
  • the horizontal distance A between the front and rear transverse axes is 84.5 mm in the exemplary embodiment.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Nozzles For Electric Vacuum Cleaners (AREA)

Description

Hintergrund der ErfindungBackground of the Invention

Die Erfindung betrifft eine Saugdüsenanordnung für einen Bodenstaubsauger, mit einer Saugdüse mit einem Saugmund, welcher eine vordere und eine hintere Saugkante aufweist, wobei die Saugdüse in einem Verbindungsteil in einem ersten Gelenk um eine vordere, horizontale Querachse schwenkbar ist, ferner mit einem Saugrohrstutzen, welcher mit dem Verbindungsteil um ein zweites Gelenk mit einer hinteren, horizontalen Querachse schwenkbar verbunden ist.The invention relates to a suction nozzle arrangement for a floor vacuum cleaner, with a suction nozzle with a suction mouth, which has a front and a rear suction edge, the suction nozzle being pivotable in a connecting part in a first joint about a front, horizontal transverse axis, further comprising a suction pipe socket, which is pivotally connected to the connecting part about a second joint with a rear, horizontal transverse axis.

Die Erfindung betrifft ferner einen damit ausgestatteten Bodenstäubsauger.The invention further relates to a vacuum cleaner equipped therewith.

Stand der TechnikState of the art

Eine Saugdüsenanordnung der eingangs genannten Art ist aus der Gebrauchsmusterschrift DE 20 2009 010 089 U1 bekannt. Die dort beschriebene Saugdüsenanordnung besteht aus einer Saugdüse mit einem sich quer erstreckenden Saugmund, welches mit einer Unterdruckquelle verbindbar ist und bei der Bodenreinigung über die zu säubernde Fläche geführt wird. Bei der Reinigung nachgiebiger Bodenbeläge liegt die Düsensohle der Saugdüse unmittelbar auf dem Boden auf. Zur Reinigung von Hartböden ist die Saugdüse in der Regel ferner mit ausfahrbaren Büsten ausgestattet, welche die Düsensohle in Gebrauchsposition anheben, so dass die Saugbürste auf den auskragenden Bürstenenden gleitet. Zum Fassen von fadenförmigen Verschmutzungen sind an der Düsensohle ferner Fadenfängern vorgesehen.A suction nozzle arrangement of the type mentioned is from the utility model DE 20 2009 010 089 U1 known. The suction nozzle arrangement described there consists of a suction nozzle with a transversely extending suction mouth which can be connected to a vacuum source and is guided over the surface to be cleaned during floor cleaning. When cleaning resilient floor coverings, the nozzle sole of the suction nozzle lies directly on the floor. For cleaning hard floors, the suction nozzle is usually also equipped with extendable brushes which raise the nozzle sole in the use position so that the suction brush slides on the projecting brush ends. To catch thread-like dirt, thread catchers are also provided on the nozzle sole.

Die Saugdüse ist in einem Verbindungsteil in einem ersten Gelenk um eine vordere horizontale Querachse in der Weise schwenkbar gelagert, dass sie aus einer bodenparallelen Horizontalstellung innerhalb eines durch Endanschläge vorgegebenen Winkels angehoben werden kann. Zwischen dem mit dem Sauggebläse strömungsverbundenen Saugrohr und der Ausmündung der Saugdüse ist ferner ein zweites Gelenk mit einer horizontalen Querachse vorgesehen, welches ein Kippen des Verbindungsteils relativ zum Saugrohr ermöglicht. Durch diese Doppelgelenkanordnung werden Unebenheiten des Bodens sowie eine Schrägstellung des Verbindungsteils ausgeglichen und ein stets vorteilhaftes Aufliegen der Düsensohle auf dem Boden erzielt. Im Bereich des zweiten Gelenks verläuft ferner die Drehachse eines Laufrollenpaars, welches den hinteren Teil des Verbindungsteils am Boden abstützt. Diese Ausbildung soll einem unkontrollierten Verkippen der Saugdüse bei Vorwärts- und Rückwärtsbewegung entgegenwirken.The suction nozzle is mounted in a connecting part in a first joint so as to be pivotable about a front horizontal transverse axis in such a way that it consists of a parallel to the floor can be raised within an angle specified by end stops. Between the suction pipe, which is connected to the suction blower and the mouth of the suction nozzle, there is also a second joint with a horizontal transverse axis, which enables the connecting part to tilt relative to the suction pipe. This double-joint arrangement compensates for unevenness in the floor and an inclined position of the connecting part, and ensures that the nozzle sole always lies comfortably on the floor. The axis of rotation of a pair of rollers, which supports the rear part of the connecting part on the floor, also runs in the region of the second joint. This training is intended to counteract an uncontrolled tilting of the suction nozzle during forward and backward movement.

Eine im Wesentlichen vergleichbare Saugdüsenanordnung in Form einer Doppelgelenkdüse wird in der Offenlegungsschrift DE 10 2006 031 486 A1 beschrieben. Abweichend von der aus DE 20 2009 010 089 U1 bekannten Ausbildung ist die Drehachse des Laufrollenpaars jedoch oberhalb der horizontalen Querachse des zweiten Gelenks angeordnet. Die Achsen und die Größe der Laufrollen sind derart bemessen, dass zwischen dem Kontaktpunkt der Laufrolle und dem zweiten Gelenk des Verbindungsteils ein vertikaler Abstand von 15 mm bis 30 mm vorgesehen ist. Der Saugrohranschluss ist dabei im zweiten Gelenk um einen Winkel von 40° bis 70°, insbesondere um einen Winkel von 50° bis 60°, schwenkbar. Das die Kippbewegung der Saugdüse im Verbindungsteil ermöglichende, durch den Strömungskanal verlaufende erste Gelenk ist gegenüber der Saugdüsensohle um mindestens 35 mm angehoben, wobei die Saugdüse um einen Winkel von maximal 15° gegenüber der Ruheposition bis zum Erreichen einer ersten Anschlagposition nach vorne kippbar ist. Nach hinten ist der Kippwinkel durch Erreichen einer zweiten Anschlagposition um etwa 10° begrenzt. Die vordere Querachse des ersten Gelenks und die hintere Querachse des zweiten Gelenks sind ihrerseits horizontal in einem Bereich von 80 mm bis 130 mm, insbesondere 90 mm bis 110 mm, beabstandet. Durch diese Ausbildung soll gleichfalls ein Verkippen der Saugdüse vermieden werden.An essentially comparable suction nozzle arrangement in the form of a double joint nozzle is disclosed in the published patent application DE 10 2006 031 486 A1 described. Deviating from that DE 20 2009 010 089 U1 known training, the axis of rotation of the pair of rollers is arranged above the horizontal transverse axis of the second joint. The axes and the size of the rollers are dimensioned such that a vertical distance of 15 mm to 30 mm is provided between the contact point of the roller and the second joint of the connecting part. The intake manifold connection can be pivoted in the second joint by an angle of 40 ° to 70 °, in particular by an angle of 50 ° to 60 °. The first joint, which enables the tilting movement of the suction nozzle in the connecting part and runs through the flow channel, is raised by at least 35 mm with respect to the suction nozzle sole, the suction nozzle being tiltable forward by an angle of at most 15 ° with respect to the rest position until a first stop position is reached. To the rear, the tilt angle is limited by approximately 10 ° by reaching a second stop position. The front transverse axis of the first joint and the rear transverse axis of the second joint are in turn horizontally spaced in a range from 80 mm to 130 mm, in particular 90 mm to 110 mm. This design should also prevent the suction nozzle from tilting.

In dem Gebrauchsmuster DE 88 09 802 U1 wird eine Doppelgelenkdüse beschrieben, bei welcher die Saugdüse einen bogenförmig gekrümmten Auslass aufweist, welcher teleskopartig in einem komplementären Rohrbogen des Verbindungsteils geführt ist. Die dadurch festgelegte horizontale Querachse des ersten Gelenks ist hinter dem Saugmund und unterhalb des Strömungskanals im Verbindungsteil angeordnet, während sich das zweite Gelenk im hinteren Teil des Verbindungsteils etwas oberhalb der Drehachse des Laufrollenpaars befindet. Eine gedachte Gerade, welche die Querachse des ersten Gelenks und die Querachse des zweiten Gelenks verbindet, verläuft dabei von vorne nach hinten um einen Winkel von etwa 20° ansteigend und trifft den Boden kurz hinter der Rückwand des Saugmunds. Hierdurch soll sichergestellt werden, dass die Saugdüse kippfrei über die zu reinigende Fläche bewegt werden kann.In the utility model DE 88 09 802 U1 describes a double-articulated nozzle in which the suction nozzle has an arcuately curved outlet which is guided telescopically in a complementary pipe bend of the connecting part. The thereby defined horizontal transverse axis of the first joint is arranged behind the suction mouth and below the flow channel in the connecting part, while the second joint is located in the rear part of the connecting part somewhat above the axis of rotation of the pair of rollers. An imaginary straight line, which connects the transverse axis of the first joint and the transverse axis of the second joint, runs from front to back at an angle of approximately 20 ° and meets the floor just behind the rear wall of the suction mouth. This is to ensure that the suction nozzle can be moved over the surface to be cleaned without tilting.

Eine weitere in einem Verbindungsteil verlagerbar angeordnete Saugdüse wird in der europäischen Patentanmeldung EP 1 180 340 A2 offenbart. Die Saugdüse ist bei dieser Ausführung mittels einer Linearführung im Verbindungsteil vertikal verschieblich gelagert und wird durch eine Schraubenfeder in Richtung des Bodens vorgespannt. Saugdüsenanordnungen der zuvor beschriebenen Art haben sich in der Praxis grundsätzlich bewährt. Zum Verschieben der Saugdüse können jedoch nicht unerhebliche Kräfte erforderlich werden, welche den Bedienkomfort des Staubsaugers mindern.A further suction nozzle arranged displaceably in a connecting part is described in the European patent application EP 1 180 340 A2 disclosed. In this embodiment, the suction nozzle is vertically displaceably mounted in the connecting part by means of a linear guide and is prestressed in the direction of the base by a coil spring. Suction nozzle arrangements of the type described above have basically proven themselves in practice. However, considerable forces may be required to move the suction nozzle, which reduce the ease of use of the vacuum cleaner.

Die Gebrauchseigenschaften von Staubsaugern für den Hausgebrauch werden nach der Norm DIN EN 60312 bestimmt, beispielsweise hinsichtlich des Staubaufnahmevermögens (Kapitel 2.2.3) sowie des Bewegungswiderstandes beim Verschieben der Saugdüse in Vorwärts- und Rückwärtsrichtung (Kapitel 4.1). Diese Eigenschaften sind somit sowohl für eine normgerechte Ausbildung des Staubsaugers als auch für eine angenehme und wirkungsvolle Handhabung von besonderer Bedeutung. Sie werden durch eine Vielzahl geometrischer und strömungstechnischer Faktoren beeinflusst, die zur Erzielung eines zufriedenstellenden Ergebnisses aufeinander abzustimmen sind. Dabei kann eine Maßnahme zur Verbesserung einer Gebrauchseigenschaft durchaus zu einer Verschlechterung einer anderen Gebrauchseigenschaft führen.The performance characteristics of vacuum cleaners for domestic use are determined according to the standard DIN EN 60312, for example with regard to the dust absorption capacity (chapter 2.2.3) and the resistance to movement when the suction nozzle is moved in the forward and backward direction (chapter 4.1). These properties are therefore of particular importance both for a standard-compliant design of the vacuum cleaner and for pleasant and effective handling. They are influenced by a large number of geometric and fluidic factors, which must be coordinated to achieve a satisfactory result. In this case, a measure to improve a utility property can certainly lead to a deterioration in another utility property.

Aus dem Stand der Technik sind zahlreiche Maßnahmen hinsichtlich der Kontur der Düsensohle bekannt, welche einen Einfluss auf die Gebrauchseigenschaften und im Besonderen auch auf den Bewegungswiderstand des Staubsaugers haben. Eine besonders ausgebildete Saugdüse ist aus der Offenlegungsschrift DE 10 2007 009 958 A1 bekannt. Die als Blechgleitsohle ausgebildete Unterseite der Saugdüse weist einen quer verlaufenden Saugmund mit sich beiderseits seiner Langseiten bodenparallel erstreckenden Auflageflächen auf, auf welchen die Saugdüse beim Reinigen von Teppichen gleitet. Die Breite der Auflageflächen beträgt bei dieser Ausführung zwischen 0,5 mm bis 4 mm, vorzugsweise zwischen 1 mm und 2 mm. Auf den dem Saugmund abgewandten Seiten der Auflageflächen ist die Blechgleitsohle mit winklig verlaufenden Aufgleitflächen ausgestattet, die beim Reinigen mit dem Boden jeweils einen Winkel von 30° bis 60° einschließen. Die dem Saugmund zugeordneten Bereiche der Blechgleitsohle, welche die Vorderwand und die Rückwand des Saugmunds ausbilden, sind mit einem Winkel von 120° bis 150° näherungsweise senkrecht nach oben gekantet und laufen jeweils mit einem Radius zwischen 0,3 mm und 2 mm, insbesondere zwischen 0,5 mm und 1 mm, in die zugeordnete Auflagefläche ein. Die in dieser Druckschrift vorgeschlagene Geometrie ist mit Blick auf eine besonders hohe und gleichmäßige Saugleistung bei angenehmer Schiebekraft verbesserungsfähig.Numerous measures regarding the contour of the nozzle sole are known from the prior art, which have an influence on the usage properties and in particular also on the movement resistance of the vacuum cleaner. A specially designed suction nozzle is from the published patent application DE 10 2007 009 958 A1 known. The underside of the suction nozzle, which is designed as a sheet metal sliding sole, has one transversely running suction mouth with on both sides of its long sides parallel to the floor support surfaces on which the suction nozzle slides when cleaning carpets. The width of the contact surfaces in this embodiment is between 0.5 mm to 4 mm, preferably between 1 mm and 2 mm. On the sides of the contact surfaces facing away from the suction mouth, the sheet metal sliding sole is equipped with angled sliding surfaces which each enclose an angle of 30 ° to 60 ° when cleaning with the floor. The areas of the sheet metal sliding sole assigned to the suction mouth, which form the front wall and the rear wall of the suction mouth, are bent approximately vertically upwards at an angle of 120 ° to 150 ° and each run with a radius between 0.3 mm and 2 mm, in particular between 0.5 mm and 1 mm into the assigned contact surface. The geometry proposed in this publication can be improved with a view to a particularly high and uniform suction power with a pleasant pushing force.

Aus der Patentschrift GB 1 493 097 ist eine Saugdüse mit einem vorderen und einem hinteren Saugmund bekannt, die mit einer gemeinsamen Mündung strömungsverbunden sind. Auch diese Saugdüse ist mit Aufgleitflächen ausgestattet, wobei eine erste, vordere Aufgleitfläche von vorne nach hinten mit einem Winkel von 4° bis 8° abfallend zum vorderen Saugmund vorgesehen ist, eine zweite, mittlere Aufgleitfläche von vorne nach hinten um 0,5 bis 1,5 mm abfallend zwischen dem vorderen und hinteren Saugmund angeordnet ist und sich eine dritte, hintere Angleitfläche von vorne nach hinten mit einem Winkel von 1° und 5° ansteigend hinter dem hinteren Saugmund befindet. Bei der Anwendung in Doppelgelenkdüsen führt eine bloße Übertragung der vorbekannten Sohlengeometrien jedoch nicht notwendigerweise zu günstigen Gebrauchseigenschaften.From the patent GB 1 493 097 is known a suction nozzle with a front and a rear suction mouth, which are fluidly connected to a common mouth. This suction nozzle is also equipped with sliding surfaces, a first, front sliding surface from the front to the rear falling at an angle of 4 ° to 8 ° to the front suction mouth, a second, middle sliding surface from the front to the rear by 0.5 to 1, 5 mm sloping between the front and rear suction mouth and a third, rear guide surface from front to back with an angle of 1 ° and 5 ° rising behind the rear suction mouth. When used in double joint nozzles, however, a mere transfer of the previously known sole geometries does not necessarily lead to favorable usage properties.

Die Gebrauchsmusterschrift DE 29 619 645 U1 offenbart einen Staubsauger mit Saugkopf und Bedienstange, wobei ein Drehschwenkgelenk zwischen Saugkopf und Bedienstange angeordnet ist. Es wird angegeben, dass der Schwenkwinkel des Schwenkgelenks üblicherweise circa 30° beträgt.The utility model DE 29 619 645 U1 discloses a vacuum cleaner with suction head and operating rod, wherein a swivel joint is arranged between the suction head and operating rod. It is stated that the swivel angle of the swivel joint is usually approximately 30 °.

Die Offenlegungsschrift US 2007 / 0 067 949 A1 offenbart einen Staubsauger mit einem Düsenkörper, in dem die eigentliche Düse um ein Gelenk schwenkbar angeordnet ist. Die Saugdüse ist an ihren seitlichen Ausläufen zur Vorderseite der Saugdüse hin gekrümmt. Im Querschnitt durch die Symmetrieebene der Saugdüse schließt eine von der Gelenkachse zur Vorderkante der Saugdüse verlaufende Gerade mit einer Vertikalen gemäß der Figur 2 einen Winkel von etwa 55° ein. Weiter sei auf das Gebrauchsmuster DE 89 01 995 U1 verwiesen.The disclosure US 2007/0 067 949 A1 discloses a vacuum cleaner with a nozzle body, in which the actual nozzle is arranged pivotably about a joint. The suction nozzle is curved at its lateral outlets to the front of the suction nozzle. In cross section through the plane of symmetry of the suction nozzle, a straight line running from the joint axis to the front edge of the suction nozzle closes with a vertical line according to FIG Figure 2 an angle of about 55 °. Further on the utility model DE 89 01 995 U1 directed.

Die Offenlegungsschrift DE 36 18 803 A1 offenbart ein Düsengehäuse mit 2 daran angeordneten Rädern. Ein solches Gehäuse ist auch aus der Offenlegungsschrift DE 10 2008 012 889 A1 bekannt. Weiter sei auf die Offenlegungsschrift DE 10 2007 057 349 A1 hingewiesen.The disclosure DE 36 18 803 A1 discloses a nozzle housing with 2 wheels arranged thereon. Such a housing is also from the published patent application DE 10 2008 012 889 A1 known. Further on the disclosure DE 10 2007 057 349 A1 pointed.

Schließlich sei noch auf die EP 1 967 114 A2 verwiesen, die ähnlich wie die DE 2006 031 486 A1 eine Doppelgelenkdüse für einen Bodenstaubsauger mit einem Saugmund offenbart, welcher eine vordere und eine hintere Saugkante aufweist, wobei die Saugdüse in einem Verbindungsteil in einem ersten Gelenk um eine vordere, horizontale Querachse schwenkbar ist, ferner mit einem Saugrohrstutzen, welcher mit dem Verbindungsteil um ein zweites Gelenk mit einer hinteren, horizontalen Querachse schwenkbar verbunden ist, sowie mit mindestens einer Laufrolle, die um eine erste Drehachse drehbar am Verbindungsteil gelagert und gegenüber dem ersten Gelenk nach hinten versetzt angeordnet ist, und wobei die Längsachse des Saugrohrstutzens mit einer Vertikalen einen hinteren Anlenkwinkel zwischen 105° und 115° einschließt.Finally, be on EP 1 967 114 A2 referenced similar to that DE 2006 031 486 A1 discloses a double-articulated nozzle for a vacuum cleaner with a suction mouth, which has a front and a rear suction edge, the suction nozzle being pivotable in a connecting part in a first joint about a front, horizontal transverse axis, furthermore having a suction pipe socket which connects with the connecting part around a second Joint is pivotally connected to a rear, horizontal transverse axis, and with at least one roller which is rotatably mounted on the connecting part about a first axis of rotation and is arranged offset to the rear relative to the first joint, and wherein the longitudinal axis of the intake manifold socket with a vertical has a rear articulation angle between Includes 105 ° and 115 °.

Der Erfindung zugrundeliegende AufgabeObject of the invention

Der Erfindung liegt die Aufgabe zugrunde, eine gattungsgemäße Saugdüsenanordnung hinsichtlich einer Verringerung des Bewegungswiderstands ohne Beeinträchtigung des Staubaufnahmevermögens weiterzuentwickeln.The invention has for its object to further develop a generic suction nozzle arrangement with a view to reducing the resistance to movement without impairing the dust absorption capacity.

Erfindungsgemäße LösungSolution according to the invention

Die der Erfindung zugrunde liegende Aufgabe wird bei einer Saugdüsenanordnung für einen Bodenstaubsauger, mit einer Saugdüse mit einem Saugmund, welcher eine vordere und eine hintere Saugkante aufweist, wobei die Saugdüse in einem Verbindungsteil in einem ersten Gelenk um eine vordere, horizontale Querachse schwenkbar ist, ferner mit einem Saugrohrstutzen, welcher mit dem Verbindungsteil um ein zweites Gelenk mit einer hinteren, horizontalen Querachse schwenkbar verbunden ist, sowie mit mindestens einer Laufrolle, die um eine erste Drehachse drehbar am Verbindungsteil gelagert und gegenüber dem ersten Gelenk nach hinten versetzt angeordnet ist, dadurch gelöst, dass die Längsachse des Saugrohrstutzens mit einer Vertikalen einen hinteren Anlenkwinkel zwischen 105° und 115° einschließt.The object underlying the invention is in a suction nozzle assembly for a vacuum cleaner, with a suction nozzle with a suction mouth, which is a front and has a rear suction edge, the suction nozzle being pivotable in a connecting part in a first joint about a front, horizontal transverse axis, further having a suction pipe socket which is pivotably connected to the connecting part about a second joint with a rear, horizontal transverse axis, and with At least one roller, which is rotatably mounted on the connecting part about a first axis of rotation and is arranged offset to the rear relative to the first joint, is solved in that the longitudinal axis of the intake manifold socket includes a rear articulation angle between 105 ° and 115 ° with a vertical.

Der Saugrohrstutzen ist für den Anschluss eines Saugrohrs vorgesehen. Die ersten und zweiten Gelenke sind um ihre jeweilige Querachse, also die vordere beziehungsweise die hintere Querachse schwenkbar. "Querachse" meint dabei, dass die Achse beim vorgesehenen Betrieb der Saugdüsenanordnung im Wesentlichen parallel zum Boden verläuft, über den die Saugdüse der Saugdüsenanordnung gleitet. Im Sinne der vorliegenden Erfindung ist das "vordere" Gelenk dasjenige der beiden Gelenke, das vom Saugrohrstutzen weiter entfernt ist, und das "hintere" Gelenk entsprechend das Gelenk, das dem Saugrohrstutzen näher ist.The intake manifold socket is intended for the connection of an intake manifold. The first and second joints can be pivoted about their respective transverse axis, that is to say the front and rear transverse axes. "Transverse axis" here means that the axis in the intended operation of the suction nozzle arrangement runs essentially parallel to the floor, over which the suction nozzle of the suction nozzle arrangement slides. In the sense of the present invention, the "front" joint is that of the two joints which is further away from the intake manifold socket, and the "rear" joint is accordingly the joint that is closer to the intake manifold socket.

Im Sinne der vorliegenden Erfindung steht die "Vertikale" orthogonal auf einer von unten an der vorderen und hinteren Saugkante sowie an der bodennahen Seite der Laufrolle anliegenden Gerade, die nachfolgend als "Horizontale" bezeichnet wird. Beim vorgesehenen Betrieb der Saugdüsenanordnung verläuft die Vertikale senkrecht zu einem unnachgiebigen Bodenbelag, über den die Saugdüse der Saugdüsenanordnung gleitet. Bei der Reinigung weicher Bodenbeläge, beispielsweise von Teppichböden, kann die Horizontale durch das Eintauchen der Saugdüse gegenüber dem Boden geringfügig versetzt und/oder geneigt verlaufen.In the sense of the present invention, the "vertical" stands orthogonally on a straight line lying from below on the front and rear suction edge and on the side of the roller close to the ground, which is referred to below as "horizontal". In the intended operation of the suction nozzle arrangement, the vertical runs perpendicular to an unyielding floor covering over which the suction nozzle of the suction nozzle arrangement slides. When cleaning soft floor coverings, for example carpets, the horizontal can be slightly offset and / or inclined relative to the floor by immersing the suction nozzle.

Erfindungsgemäß ist ferner vorgesehen, dass der vordere Anlenkwinkel, den eine die vordere Saugkante des Saugmunds und die vordere Querachse des ersten Gelenks verbindende Gerade mit einer durch die vordere Querachse nach unten verlaufenden Vertikalen einschließt, zwischen 55° und 75°, besonders vorzugsweise zwischen 60° und 70° beträgt. Auch dies kann vorteilhafterweise zu einer weiteren Verringerung des Bewegungswiderstands und damit zu einem besonders günstigen Verhältnis zwischen Staubaufnahme und die Schiebkraft beitragen. Besonders vorzugsweise beträgt der vordere Anlenkwinkel näherungsweise 65°. Im Sinne der vorliegenden Erfindung ist die vordere Saugkante des Saugmunds dessen der vorderen Querachse abgewandte Kante.According to the invention, it is further provided that the front articulation angle, which includes a straight line connecting the front suction edge of the suction mouth and the front transverse axis of the first joint, with a vertical running downwards through the front transverse axis, between 55 ° and 75 °, particularly preferably between 60 ° and is 70 °. This can also advantageously lead to a further reduction in the resistance to movement and thus to a particularly favorable ratio between Dust absorption and the pushing force contribute. The front articulation angle is particularly preferably approximately 65 °. In the sense of the present invention, the front suction edge of the suction mouth is its edge facing away from the front transverse axis.

Die Erfinder haben gefunden, dass mit dem erfindungsgemäßen hinteren Anlenkwinkel bei guter Staubaufnahme die Schiebkraft verringert werden kann, die erforderlich ist, um die Saugdüsenanordnung über den Boden, d.h. auf dem Boden in eine Bewegungsrichtung parallel zum bearbeiteten Boden zu bewegen. Es ist insbesondere erreichbar, dass der Kraftfluss vom Saugrohrstutzen in Richtung des Saugmunds insbesondere bei Bewegung in Vorwärtsrichtung weder zu einem Eingraben der Saugdüse in einen nachgiebigen Bodenbelag noch zu einem ungewollten Abheben des Saugmunds führt, sondern die Düsensohle in einer hinsichtlich der Reibkraft und Staubaufnahme günstigen Position relativ zum Boden ausrichtet.The inventors have found that with the rear articulation angle according to the invention, with good dust absorption, the pushing force which is required to move the suction nozzle arrangement over the floor, i.e. to move on the floor in a direction parallel to the machined floor. In particular, it can be achieved that the flow of force from the intake manifold in the direction of the suction mouth, in particular when moving in the forward direction, neither leads to the suction nozzle digging into a flexible floor covering nor to an unwanted lifting of the suction mouth, but rather the nozzle sole in a position which is favorable in terms of the frictional force and dust absorption aligns relative to the ground.

Diese Lösung fußt auf der Erkenntnis der Erfinder, dass die Düsensohle beim Saugvorgang infolge des anliegenden Unterdrucks leicht in einen nachgiebigen Bodenbelag, insbesondere einen Teppichboden, eintaucht. Bei einem Saugluftstrom von 40 Litern/Sekunde kann die Eintauchtiefe bei üblichen Teppichböden durchaus 2 mm betragen. Aufgabe der vorzugsweise beiderseits des Strömungskanals angeordneten Gleiträder ist es, die Saugdüse bei Bewegung in Vorwärtsrichtung waagerecht zur Bodenfläche zu führen, um ein Abkippen der Saugdüse zu verhindern. Durch den erfindungsgemäßen Abstand gelangt das Gleitrad nur dann in Kontakt mit dem Boden, wenn die Saugdüse über ein vorgegebenes Maß hinaus in den nachgiebigen Bodenbelag eintaucht, erhöht den Bewegungswiderstand bei Nichtgebrauch der Gleitrolle jedoch nicht. Darüber hinaus führt diese Anordnung beim Reinigen von Teppichböden zu einer besonders guten Staubaufnahme.This solution is based on the knowledge of the inventors that the nozzle sole easily dips into a resilient floor covering, in particular a carpet, during the suction process due to the negative pressure present. With a suction air flow of 40 liters / second, the immersion depth can be 2 mm with common carpets. The task of the sliding wheels, which are preferably arranged on both sides of the flow channel, is to guide the suction nozzle horizontally to the floor surface when moving in the forward direction in order to prevent the suction nozzle from tipping over. Due to the distance according to the invention, the sliding wheel only comes into contact with the ground when the suction nozzle is immersed in the resilient floor covering by a predetermined amount, but does not increase the resistance to movement when the sliding roller is not in use. In addition, this arrangement leads to particularly good dust absorption when cleaning carpets.

Zur Lösung der erfindungsgemäßen Aufgabe ist ferner ein Bodenstaubsauger mit einer derartigen Saugdüsenanordnung geeignet.A canister vacuum cleaner with such a suction nozzle arrangement is also suitable for achieving the object according to the invention.

Bevorzugte Ausgestaltung der ErfindungPreferred embodiment of the invention

Vorteilhafte Aus- oder Weiterbildungen, welche einzeln oder in Kombination miteinander eingesetzt werden können, sind Gegenstand der abhängigen Ansprüche.Advantageous training or further developments, which can be used individually or in combination, are the subject of the dependent claims.

Der erfindungsgemäße hintere Anlenkwinkel beträgt zwischen 105° und 115°. Die Erfinder haben gefunden, dass bei dieser Auslegung ein besonders gutes Verhältnis zwischen Staubaufnahme und die Schiebkraft, die erforderlich ist, um die Saugdüsenanordnung über den Boden zu bewegen, erreicht werden kann. Insbesondere ist ein besonders geringer Bewegungswiderstand der Saugdüsenanordnung beim Scheiben erreichbar. Besonders vorzugsweise beträgt der hintere Anlenkwinkel (β) näherungsweise 110°. Es ist ein erreichbarer Vorteil des erfindungsgemäßen vorderen Anlenkwinkels, dass bei guter Staubaufnahme die Schiebkraft verringert werden kann, die erforderlich ist, um die Saugdüsenanordnung über den Boden zu bewegen. Insbesondere ist erreichbar, dass einerseits eine hinsichtlich der Reibkraft günstige Ausrichtung der Düsensohle relativ zum Boden erzielt wird, andererseits jedoch auch ein sanftes Einlenken des Luftstroms in den Düsenkanal bewirkt wird, wodurch pneumatische Leistungsverluste vermieden und die Staubaufnahme verbessert werden kann.The rear articulation angle according to the invention is between 105 ° and 115 °. The inventors have found that with this design a particularly good ratio between dust pick-up and the pushing force required to move the suction nozzle arrangement over the floor can be achieved. In particular, a particularly low resistance to movement of the suction nozzle arrangement can be achieved when slicing. The rear articulation angle (β) is particularly preferably approximately 110 °. It is an achievable advantage of the front articulation angle according to the invention that, with good dust absorption, the pushing force which is required to move the suction nozzle arrangement over the floor can be reduced. In particular, it can be achieved that, on the one hand, an alignment of the nozzle sole relative to the floor which is favorable with regard to the frictional force is achieved, but on the other hand, a gentle deflection of the air flow into the nozzle duct is also effected, as a result of which pneumatic power losses can be avoided and dust absorption can be improved.

In einer bevorzugten Ausführung der Erfindung beträgt der kumulierte Anlenkwinkel zwischen 170° und 180°, besonders vorzugsweise zwischen 173° und 177°. Hierdurch kann insgesamt ein besonders günstiges Verhältnis zwischen Staubaufnahme und die Schiebkraft, insbesondere eine Verringerung des Bewegungswiderstands, erzielt werden. Besonders vorzugsweise beträgt der kumulierte Anlenkwinkel näherungsweise 175°.In a preferred embodiment of the invention, the cumulative articulation angle is between 170 ° and 180 °, particularly preferably between 173 ° and 177 °. As a result, a particularly favorable ratio between dust absorption and the pushing force, in particular a reduction in the movement resistance, can be achieved. The cumulative articulation angle is particularly preferably approximately 175 °.

Vorzugsweise liegen die Drehachse der Laufrolle und die hintere Querachse des zweiten Gelenks auf einer gemeinsamen Vertikalen. Mit anderen Worten, die Drehachse der Laufrolle liegt vertikal über oder unter der hinteren Querachse. In dieser Ausführung der Erfindung kann das Verbindungsteil durch die Laufrolle vorteilhaft in der Weise abgestützt werden, dass eine besonders günstige Krafteinleitung von dem Saugrohrstutzen in das zweite Gelenk und von da aus in das erste Gelenk erfolgt.The axis of rotation of the roller and the rear transverse axis of the second joint preferably lie on a common vertical. In other words, the axis of rotation of the roller is vertically above or below the rear transverse axis. In this embodiment of the invention, the connecting part can advantageously be supported by the roller in such a way that a particularly favorable introduction of force from the intake manifold nozzle into the second joint and from there into the first joint takes place.

Bei einer besonders bevorzugten Ausführung der Erfindung, fällt die Drehachse der Laufrolle(n) mit der hinteren Querachse des zweiten Gelenks zusammen. Hierdurch kann insbesondere die Konstruktion der erfindungsgemäßen Saugdüsenanordnung vereinfacht werden, da Komponenten der Drehachse zugleich zur Ausbildung des zweiten Gelenks genutzt werden können.In a particularly preferred embodiment of the invention, the axis of rotation of the roller (s) coincides with the rear transverse axis of the second joint. This can in particular simplify the construction of the suction nozzle arrangement according to the invention, since components of the axis of rotation can also be used to form the second joint.

Mit Vorteil beträgt der Durchmesser der Laufrollen weniger als 75 mm, insbesondere zwischen 40 mm und 60 mm, und mit besonderem Vorteil näherungsweise 50 mm. Die erste Drehachse ist somit weniger als 37,5 mm von einem (unnachgiebigen) Boden entfernt und besonders bevorzugt 25 mm zu diesem vertikal beabstandet. Durch diese Dimensionierung können die vorteilhaften Anlenkwinkel mit einer Beschränkung der Längserstreckung des Düsengehäuses verbunden werden. Eine Vergrößerung des Laufrollendurchmessers über den angegebenem Bereich hinaus wäre zwar grundsätzlich durchführbar, würde jedoch zu einer unüblichen langen Saugdüsenanordnung führen.The diameter of the rollers is advantageously less than 75 mm, in particular between 40 mm and 60 mm, and with particular advantage approximately 50 mm. The first axis of rotation is thus less than 37.5 mm from an (unyielding) floor and is particularly preferably 25 mm vertically spaced from this. This dimensioning means that the advantageous articulation angles can be combined with a restriction of the longitudinal extent of the nozzle housing. An increase in the roller diameter beyond the specified range would in principle be feasible, but would lead to an unusually long suction nozzle arrangement.

Das bevorzugte Gleitrad ist in horizontaler Richtung zwischen dem ersten Gelenk und dem zweiten Gelenk des Verbindungsteils angeordnet. Dies ermöglicht eine besonders günstige bodenparallele Ausrichtung der Saugdüse.The preferred sliding wheel is arranged in the horizontal direction between the first joint and the second joint of the connecting part. This enables a particularly favorable alignment of the suction nozzle parallel to the floor.

Der horizontale Abstand zwischen der vorderen Querachse und der hinteren Querachse, d.h. der in eine Richtung einer Horizontalen gemessene kürzeste Abstand zwischen diesen beiden Achsen, beträgt vorzugsweise zwischen 80 und 90 mm, besonders vorzugsweise zwischen 82 und 86 mm, besonders vorzugsweise ca. 84,5 mm.The horizontal distance between the front transverse axis and the rear transverse axis, i.e. the shortest distance measured in one direction of a horizontal between these two axes is preferably between 80 and 90 mm, particularly preferably between 82 and 86 mm, particularly preferably approximately 84.5 mm.

Die vorliegende Erfindung eignet sich insbesondere für den Einsatz bei Saugdüsen mit Metallsohle. Eine Metallsohle besteht teilweise oder sogar vollständig aus Metall, besonders vorzugsweise Stahl. Eine Metallsohle kann widerstandsfähiger und damit haltbarer sein als z.B. eine Sohle aus Kunststoff. Weiter kann sie durch ihr Gewicht zu einer Verbesserung des Bodenkontakts und damit einer weiter verbesserten Staubaufnahme beitragen. Auch kann sie der Saugdüse eine hochwertigere Anmutung verleihen.The present invention is particularly suitable for use in suction nozzles with a metal sole. A metal sole consists partly or even completely of metal, particularly preferably steel. A metal sole can be more resistant and therefore more durable than, for example, a plastic sole. Due to its weight, it can also contribute to an improvement in contact with the ground and thus a further improvement in dust absorption. It can also give the suction nozzle a higher quality appearance.

Kurzbeschreibung der FigurenBrief description of the figures

Die Erfindung wird im Folgenden anhand schematischer Zeichnungen an einem Ausführungsbeispiel mit weiteren Einzelheiten näher erläutert.The invention is explained in more detail below with the aid of schematic drawings using an exemplary embodiment.

Es zeigen:

Fig. 1:
einen Teillängsschnitt durch eine erfindungsgemäße Saugdüsenanordnung;
Fig. 2:
einen weiteren Längsschnitt durch die Saugdüsenanordnung nach Fig. 1 mit Darstellung eines Gleitrads.
Show it:
Fig. 1:
a partial longitudinal section through an inventive suction nozzle arrangement;
Fig. 2:
a further longitudinal section through the suction nozzle arrangement Fig. 1 with representation of a sliding wheel.

Ausführliche Beschreibung der Erfindung anhand eines AusführungsbeispielsDetailed description of the invention using an exemplary embodiment

Alle Richtungs- und Ortsangaben beziehen sich auf eine Saugdüse, welche auf einer horizontalen Fläche aufliegt und in Vorwärtsrichtung, also in horizontaler Richtung entgegen der Längserstreckung eines mit der Saugdüse verbundenen Saugrohrstutzens, bewegt wird.All direction and location information relate to a suction nozzle, which rests on a horizontal surface and is moved in the forward direction, that is to say in the horizontal direction, counter to the longitudinal extent of an intake pipe socket connected to the suction nozzle.

Die in Fig. 1 dargestellte Saugdüsenanordnung 1 besteht aus einem Verbindungsteil 2, das üblicherweise als komplex geformtes Bauteil aus Kunststoff spritzgegossen wird. Im vorderen Bereich des Verbindungsteils 2 ist eine Saugdüse 3 angeordnet, welche über ein erstes Gelenk 4 um eine vordere horizontale Querachse 5 schwenkbar in dem Verbindungsteil 2 gelagert ist. Das Gehäuse der Saugdüse ist aus Gründen der Übersichtlichkeit nicht dargestellt. Die Saugdüse 3 weist eine gleitfähige Düsensohle 6 auf, welche beim Reinigen eines nachgiebigen Bodenbelags unmittelbar über die Bodenfläche geführt wird. Die Düsensohle 6 wird von einem sich quer erstreckenden Saugmund 7 durchbrochen, welches mit der Unterdruckquelle des Bodenstaubsaugers in Strömungsverbindung steht und den Staub vom Boden aufnimmt. Auf der der Düsensohle 6 entgegen gesetzten Seite der Saugdüse 3 ist ein nach hinten kreisbogenförmig auskragender Rohrbogen 8 vorgesehen, welcher teleskopartig verschiebbar und gedichtet in einem komplementär geformten Strömungskanal des Verbindungsteils 2 geführt ist. Die Krümmung des Rohrbogens 8 und des zugeordneten Bereichs des Strömungskanals erfolgt dabei äquidistant zur vorderen Querachse 5.In the Fig. 1 The suction nozzle arrangement 1 shown consists of a connecting part 2, which is usually injection molded as a complex component made of plastic. A suction nozzle 3 is arranged in the front area of the connecting part 2 and is mounted in the connecting part 2 so as to be pivotable about a front horizontal transverse axis 5 via a first joint 4. The housing of the suction nozzle is not shown for reasons of clarity. The suction nozzle 3 has a slidable nozzle sole 6, which is guided directly over the floor surface when cleaning a resilient floor covering. The nozzle sole 6 is pierced by a transversely extending suction mouth 7, which is in flow connection with the vacuum source of the cylinder vacuum cleaner and picks up the dust from the floor. On the opposite side of the nozzle sole 6 of the suction nozzle 3 is a circular arc to the rear Cantilever pipe bend 8 is provided, which is telescopically displaceable and sealed in a complementarily shaped flow channel of the connecting part 2. The curvature of the pipe bend 8 and the assigned area of the flow channel is carried out equidistant from the front transverse axis 5.

Nach vorne und hinten ist der Saugmund 7 durch eine näherungsweise senkrecht verlaufende Vorderwand 9 sowie eine näherungsweise senkrecht verlaufende Rückwand 10 begrenzt, welche im Übergang zur Düsensohle 6 eine vordere Saugkante 11 und eine hintere Saugkante 12 ausbilden. Durch die vordere Querachse 5 und die vordere Saugkante 11 ist in seitlicher Ansicht eine gedachte Gerade G1 gezeichnet, welche mit einer aus der Querachse 5 nach unten weisenden Vertikalen V einen vorderen Anlenkwinkel α von 65° einschließt.To the front and rear, the suction mouth 7 is delimited by an approximately vertical front wall 9 and an approximately vertical rear wall 10, which form a front suction edge 11 and a rear suction edge 12 in the transition to the nozzle sole 6. Through the front transverse axis 5 and the front suction edge 11, an imaginary straight line G 1 is drawn in a side view, which includes a front articulation angle α of 65 ° with a vertical V pointing downward from the transverse axis 5.

Im hinteren Bereich des Verbindungsteils 2 ist ein zweites Gelenk 13 vorgesehen, über welches das Verbindungsteil 2 um eine hintere horizontal verlaufende Querachse mit dem Saugrohrstutzen 14 zum Anschluss eines Saugrohrs drehverbunden ist. Im unteren Bereich des zweiten Gelenks 13 sind beiderseits des Strömungskanals Laufrollen 15 am Verbindungsteil 2 angeordnet, welche um eine quer verlaufende, horizontale erste Drehachse 16' drehbar sind und das Verbindungsteil 2 im hinteren Bereich am Boden abstützen. Die Laufrollen 15 weisen einen Durchmesser D von 50 mm auf, so dass die Drehachse 16' einen vertikalen Abstand H von 25 mm zum Boden aufweist. Die Längsachse G2 des Saugrohrstutzens 14 schließt mit der Vertikalen V einen hinteren Anlenkwinkel β von 110° ein.In the rear area of the connecting part 2, a second joint 13 is provided, via which the connecting part 2 is rotatably connected to the intake manifold connector 14 about a rear horizontal transverse axis for connecting an intake manifold. In the lower region of the second joint 13, on both sides of the flow channel, rollers 15 are arranged on the connecting part 2, which can be rotated about a transverse, horizontal first axis of rotation 16 ′ and support the connecting part 2 in the rear region on the floor. The rollers 15 have a diameter D of 50 mm, so that the axis of rotation 16 'has a vertical distance H of 25 mm from the floor. The longitudinal axis G 2 of the intake manifold 14 includes with the vertical V a rear articulation angle β of 110 °.

Die Summe aus dem vorderen Anlenkwinkel α und dem hinteren Anlenkwinkel β bildet den kumulierten Anlenkwinkel χ = α + β.The sum of the front linkage angle α and the rear linkage angle β forms the cumulative linkage angle χ = α + β.

Durch den gewählten kumulierten Anlenkwinkel χ von 175° wird bewirkt, dass der Kraftfluss vom Saugrohrstutzen 14 in Richtung des Saugmunds 7 insbesondere bei Bewegung in Vorwärtsrichtung weder zu einem Eingraben der Saugdüse 3 in einen nachgiebigen Bodenbelag noch zu einem ungewollten Abheben des Saugmunds 7 führt, sondern die Düsensohle 6 in einer hinsichtlich der Reibkraft und Staubaufnahme günstigen Position relativ zum Boden ausrichtet. Dabei ist der vordere Anlenkwinkel α von 65° besonders günstig mit Blick auf ein sanftes Einlenken des Luftstroms in den Strömungskanal und das damit verbundene Vermeiden pneumatischer Leistungsverluste, wodurch die Staubaufnahme bei vorgegebener Saugluftmenge verbessert wird.The selected cumulative articulation angle χ of 175 ° has the effect that the flow of force from the intake manifold 14 in the direction of the suction mouth 7, in particular when moving in the forward direction, neither leads to the suction nozzle 3 digging into a flexible floor covering nor to an undesired lifting of the suction mouth 7, but instead the nozzle sole 6 in a with regard to the frictional force and dust absorption aligns favorable position relative to the ground. The front articulation angle α of 65 ° is particularly favorable with a view to gently deflecting the air flow into the flow duct and the associated avoidance of pneumatic power losses, which improves the dust pick-up with a given amount of suction air.

Wie aus Fig. 2 ersichtlich, sind zwischen dem ersten Gelenk 4 für die Saugdüse 3 und der ersten Drehachse 16' der Laufrollen 15 Gleiträder 17 am Verbindungsteil 2 um eine zweite, ebenfalls quer und horizontal verlaufende Drehachse 18 drehbar gelagert. Genauer sind die Gleiträder in dem aus Gründen der Übersichtlichkeit nicht dargestellten Gehäuse der Saugdüse gelagert. Die zweite Drehachse 18 ist annähernd mittig zwischen der ersten Drehachse 16' und der Querachse 5 derart angeordnet, dass die Gleiträder 17 in Ruheposition um einen Abstand h von 1,25 mm gegenüber dem Boden angehoben sind. Beim Saugen von Hartböden gelangen die Gleiträder 17 nicht in Kontakt mit der Bodenfläche. Wird hingegen ein nachgiebiger Teppichboden gereinigt, dringt die Düsensohle 6 durch den Unterdruck in den Bodenbelag ein. Dies führt zu einem Absenken des Verbindungsteils 2 und damit zu einem Aufsitzen der Gleiträder 17 auf der Bodenfläche. Hierdurch wird einem weiteren Verkippen entgegen gewirkt, welches eine deutliche Erhöhung des Bewegungswiderstands verursachen würde.How out Fig. 2 can be seen, between the first joint 4 for the suction nozzle 3 and the first axis of rotation 16 'of the rollers 15, sliding wheels 17 are mounted on the connecting part 2 so as to be rotatable about a second axis of rotation 18 which also runs transversely and horizontally. More precisely, the sliding wheels are mounted in the suction nozzle housing (not shown for reasons of clarity). The second axis of rotation 18 is arranged approximately centrally between the first axis of rotation 16 'and the transverse axis 5 such that the sliding wheels 17 are raised in the rest position by a distance h of 1.25 mm from the ground. When vacuuming hard floors, the sliding wheels 17 do not come into contact with the floor surface. If, on the other hand, a flexible carpet is cleaned, the nozzle sole 6 penetrates into the floor covering due to the negative pressure. This leads to a lowering of the connecting part 2 and thus to a seating of the sliding wheels 17 on the floor surface. This counteracts a further tilting, which would cause a significant increase in resistance to movement.

Der horizontale Abstand A zwischen der vorderen und der hinteren Querachse beträgt in dem Ausführungsbeispiel 84,5 mm.The horizontal distance A between the front and rear transverse axes is 84.5 mm in the exemplary embodiment.

Die in der vorstehenden Beschreibung, den Ansprüchen und den Zeichnungen offenbarten Merkmale können sowohl einzeln als auch in beliebiger Kombination für die Verwirklichung der Erfindung in ihren verschiedenen Ausgestaltungen von Bedeutung sein.The features disclosed in the above description, the claims and the drawings may be of importance both individually and in any combination for the implementation of the invention in its various configurations.

Bezugszeichenreference numeral

11
Saugdüsenanordnungsuction nozzle
22
Verbindungsteilconnecting part
33
Saugdüsesuction nozzle
44
Gelenk (erstes)Joint (first)
55
Querachse (vorne)Transverse axis (front)
66
Düsensohlenozzles sole
77
Saugmundsaugmund
88th
RohrbogenElbows
99
Vorderwandfront wall
1010
Rückwandrear wall
1111
Saugkante (vorne)Suction edge (front)
1212
Saugkante (hinten)Suction edge (rear)
1313
Gelenk (zweites)Joint (second)
1414
Saugrohrstutzenshort conduits
1515
Laufrollecaster
1616
Querachse (hinten)Transverse axis (rear)
16'16 '
Drehachse (der Laufrolle 15)Axis of rotation (of the roller 15)
1717
Gleitradsliding wheel
1818
Drehachse (des Gleitrads 17)Axis of rotation (of the sliding wheel 17)
αα
vorderer Anlenkwinkelfront link angle
ββ
hinterer Anlenkwinkelrear articulation angle
χχ
kumulierter Anlenkwinkelaccumulated articulation angle
AA
Horizontaler Abstand zwischen der vorderen und der hinteren QuerachseHorizontal distance between the front and rear transverse axes
DD
Durchmesser (der Laufrolle 15)Diameter (of the roller 15)
G1 G 1
Gerade (Querachse 5 zu Saugkante 11)Straight (transverse axis 5 to suction edge 11)
G2 G 2
Längsachse des SaugrohrstutzensLongitudinal axis of the intake manifold socket
G3 G 3
Gerade (Saugkante 11 über Saugkante 12 zu Unterseite Laufrolle 15)Straight (suction edge 11 over suction edge 12 to underside of roller 15)
hH
Abstand (Gleitrad 17 zur Geraden G3)Distance (sliding wheel 17 to straight line G 3 )
HH
Abstand (Drehachse 16' zur Geraden G3)Distance (axis of rotation 16 'to straight line G 3 )
VV
Vertikalevertical

Claims (8)

  1. Suction nozzle assembly (1) for a floor vacuum cleaner, having a suction nozzle (3) with a suction mouth (7) which has a front and a rear suction edge (11, 12), wherein the suction nozzle (3) is pivotable about a front horizontal transverse axis (5) in a connecting part (2) in a first joint (4), further having a suction pipe connection (14) which is pivotally connected to the connecting part (2) about a second joint (13) with a rear horizontal transverse axis (16), and having at least one roller (15) which is rotatably mounted about a first axis of rotation (16') on the connecting part (2) and is arranged offset rearwards from the first joint (4), and wherein the longitudinal axis (G2) of the suction pipe connection (14) with a vertical (V) includes a rear angle of articulation (β) between 105° and 115°, characterised in that a straight line (G1) connecting the front suction edge (11) of the suction mouth (7) and the front transverse axis (5) of the first joint (4) with a vertical (V) running downwards through the front transverse axis (5) includes a front angle of articulation (α) between 55° and 75°.
  2. Suction nozzle assembly according to claim 1, characterised in that the front angle of articulation (α) is between 60° and 70°.
  3. Suction nozzle assembly according to one of claims 1 to 2, characterised in that a straight line (G1) connecting the front suction edge (11) of the suction mouth (7) and the front transverse axis (5) of the first joint (4) with a longitudinal axis (G2) of the suction pipe connection (14) includes a cumulative angle of articulation (χ) between 170° and 180°, wherein the cumulative angle of articulation (χ) includes the sum of the front angle of articulation (α), which a straight line (G1) connecting the front suction edge (11) of the suction mouth (7) and the front transverse axis (5) of the first joint (4) and having a vertical (V) running downwards through the front transverse axis (5) includes, and of a rear angle of articulation (β) which the longitudinal axis (G2) of the suction pipe connection (14) with the vertical (V) includes.
  4. Suction nozzle assembly according to claim 3, characterised in that the cumulative angle of articulation (χ) is between 173° and 177°.
  5. Suction nozzle assembly according to one of the preceding claims, characterised in that the axis of rotation (16') of the roller (15) and the rear transverse axis (16) of the second joint (13) lie on a common vertical.
  6. Suction nozzle assembly according to claim 5, characterised in that the axis of rotation (16') of the roller (15) coincides with the rear transverse axis (16) of the second joint (13).
  7. Suction nozzle assembly according to one of the preceding claims, characterised in that the diameter (D) of the roller (15) is less than 75 mm, in particular between 40 mm and 60 mm, and particularly advantageously approximately 50 mm.
  8. Floor vacuum cleaner having a suction nozzle assembly according to one of the preceding claims.
EP11186312.2A 2010-11-05 2011-10-24 Suction nozzle assembly for a floor vacuum cleaner Active EP2449934B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102010043515.5A DE102010043515B4 (en) 2010-11-05 2010-11-05 Suction nozzle arrangement and vacuum cleaner

Publications (3)

Publication Number Publication Date
EP2449934A2 EP2449934A2 (en) 2012-05-09
EP2449934A3 EP2449934A3 (en) 2017-12-27
EP2449934B1 true EP2449934B1 (en) 2020-01-01

Family

ID=45491232

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11186312.2A Active EP2449934B1 (en) 2010-11-05 2011-10-24 Suction nozzle assembly for a floor vacuum cleaner

Country Status (2)

Country Link
EP (1) EP2449934B1 (en)
DE (1) DE102010043515B4 (en)

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DE102012106570B4 (en) * 2012-07-19 2014-08-28 Wessel-Werk Gmbh Vacuum cleaner nozzle, in particular for household vacuum cleaners
CN105142477B (en) * 2013-03-21 2017-07-04 伊莱克斯公司 Vacuum cleaner nozzle with the rigid element being hinged
DE102014107812A1 (en) * 2014-06-03 2015-12-03 Vorwerk & Co. Interholding Gmbh Vacuum cleaner nozzle for a vacuum cleaner
ITUA20162159A1 (en) * 2016-03-31 2017-10-01 New Ermes Europe Srl Suction head with perfected suction channel
US11224319B2 (en) 2017-12-11 2022-01-18 New Ermes Europe S.R.L. Base plate for a vacuum cleaner suction head for the suction of fine dust and large debris
DE102018122352A1 (en) * 2018-09-13 2020-03-19 Miele & Cie. Kg Floor nozzle with a wheel arrangement, vacuum cleaner with a floor nozzle and method for producing a floor nozzle
JP1641037S (en) 2018-09-18 2019-09-09
IT202000001555A1 (en) 2020-01-28 2021-07-28 New Ermes Europe Srl Adapter device for cordless electric vacuum cleaner
USD953673S1 (en) 2020-02-17 2022-05-31 New Ermes Europe S.R.L. Head of a vacuum cleaner
CN113349676B (en) * 2020-03-03 2024-05-28 苏州市春菊电器有限公司 Dust collector floor brush with flexible rotating shaft structure

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Also Published As

Publication number Publication date
DE102010043515B4 (en) 2014-10-16
EP2449934A3 (en) 2017-12-27
EP2449934A2 (en) 2012-05-09
DE102010043515A1 (en) 2012-05-10

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