EP2875765B1 - Suction nozzle for a vacuum cleaner - Google Patents

Description

field of invention

The invention relates to a suction nozzle for a vacuum cleaner. In particular, the invention relates to sealing the suction nozzle from a surface to be treated with the vacuum cleaner.

Background of the Invention

The disclosure document DE 10 2008 012 889 A1 describes a suction nozzle for a canister vacuum cleaner. The suction nozzle has a separately switchable additional device for sucking up coarse dirt, with which a front strip that is extended between the floor surface to be cleaned and the front strip for vacuuming smooth floors can be adjusted and/or the flow cross section of openings in the front strip can be changed. The additional device has an additional front sealing element, which is mounted displaceably in the suction head and can be actuated to close openings in the front strip. The openings in the front strip are closed to collect dust on lightly soiled smooth floors. The openings, which extend to the lower edge of the front strip, are released by actuating the front sealing element in order to collect coarse dirt.

The disclosure document DE 10 2005 061 646 A1 describes a floor nozzle for a vacuum cleaner. The floor nozzle has a vertically movable limiting means at the front in a travel direction. According to the prior art, a limiting means can be designed, for example, in the form of a sealing lip or a strip of bristles. A suction space seal can be achieved by means of such limiting means, and a high flow rate can be generated on the surface of the floor to be vacuumed, in particular hard floor, or in joints or cracks. the Offenlegungsschrift describes a peripheral enclosure of the suction chamber by means of delimitation. As a result, an increased flow velocity acting on the ground is achieved.

the Publication EP 0 630 604 A1 describes a floor vacuum cleaner, in particular an attachment or part of an electric vacuum cleaner, for the care of carpets or hard floors. The object of the invention is, among other things, to achieve optimum suction power both on carpets and on hard floors. The suction chamber of the solution according to the invention is delimited by curtain means, with the curtain means being able to be raised or lowered relative to the floor vacuum cleaner. The air inlet opening of a suction nozzle is reduced by the curtain means. For this purpose, the curtain means are lowered in such a way that they rest on the hard floor to be cleaned and thus limit the suction space.

Finally revealed the EP 0 382 598 A1 a suction nozzle for a vacuum cleaner, wherein the suction nozzle has a suction channel and at least one first section for enclosing a suction area of the suction nozzle, and wherein the first section can enclose the suction area in a sealing manner, and the first section has a circumferential sealing area for sealing the suction area against a Vacuum cleaner has surface to be treated, and wherein the suction nozzle has a second portion for enclosing the suction area.

The problem underlying the invention

The object of the invention is to provide an improved suction nozzle for a vacuum cleaner. In particular, it should be possible with the suction nozzle in a simple manner to achieve a particularly good ratio between the dust pick-up and the energy consumption of the vacuum cleaner with which the suction nozzle is used, specifically on hard floors with cracks. In addition, the operating noise of the suction nozzle should be reduced.

Solution according to the invention

The task at hand is achieved by a suction nozzle having the features of the appended independent claim. Subclaims reflect preferred embodiments.

In terms of the present invention, the suction area is the area of the suction nozzle into which the suction channel opens on the suction nozzle side. Because the first section encloses the suction area, it also encloses the opening of the suction channel on the suction nozzle side.

The invention makes use of the fact that the surrounding sealing area can significantly limit air inflow from the outside, ie from outside the sealed suction area. As a result, with the suction nozzle according to the invention it is advantageously possible to build up a higher suction pressure in the suction area with a comparable blower output or to achieve a comparable suction pressure even with a lower blower output. A higher suction pressure in the suction area can advantageously bring about improved dust pick-up. In particular, it can be achieved that dust that is in cracks or joints of the surface is better sucked up. Furthermore, it can be achieved that dust or other fine material or coarse material to be sucked up, which adheres or sticks to the surface, is sucked up better by means of the increased suction pressure of the suction nozzle according to the invention. A lower required fan power can result in significant energy savings.

The peripheral sealing area of the suction nozzle according to the invention is in particular designed in such a way that gap-like or crack-like depressions in the surface to be treated are not, at least not completely, sealed during suction. This can be achieved, for example, by means of the geometry and/or the choice of material for the circumferential sealing area. A very narrow circumferential sealing area with a very flexible and soft material can, for example, adapt better to a joint shape and thus seal it than a wide sealing area with a hard material. The peripheral sealing area can, for example, abut or rest on the surface, or sweep over the surface without completely penetrating into the cracks or into the joints of the surface. Depending on the design of the circumferential sealing area, for example as a narrow or wide elastic rubber sealing lip, as Felt strips, as fleece strips, as bristle strips or as a plastic web, and depending on the orientation of the circumferential sealing area in relation to the cracks and joints, the sealing area can partially narrow the cross-section of the cracks or joints. The circumferential sealing area is designed in such a way that the suction pressure also covers the cracks and joints, and thus dust and other fine material, and depending on the shape of the crack, also coarse material, can be sucked off. This suction effect is not limited to the cracks and joints in the immediate suction area, but can also cover cracks and joints that extend into the surrounding area outside the suction area of the surface to be processed.

For the purposes of the invention, the term vacuum cleaner encompasses all types of vacuum cleaner, including canister vacuum cleaners, stick vacuum cleaners and upright vacuum cleaners. The vacuum cleaner can be a dry and/or wet vacuum cleaner and can be either bagged or bagless, e.g. B. work after the vortex separation process. The vacuum cleaner is preferably a canister vacuum cleaner. A vacuum cleaner can be used for different floor coverings, for example for hard floors with different surface structures (e.g. smooth surfaces, rough surfaces, structured surfaces, surfaces with signs of wear, etc.), for tiled floors with or without joints between the tiled panels, for carpeted floors or other floor coverings will. The suction pressure is generated in particular by means of a suction fan on or in the vacuum cleaner. The notion of suction pressure is defined as a negative pressure (negative positive pressure) compared to the ambient air pressure.

Preferred embodiment of the invention

Advantageous training and developments, which can be used individually or in combination with one another, are the subject matter of the dependent claims.

The sealing area of the first section can e.g. B. be designed as a bristle strip or wreath. A strip of bristles is a straight or curved area of bristles arranged next to one another and aligned in parallel. A ring of bristles is a strip of bristles closed to form a ring, with the ring preferably not having a circular shape but a rectangular or oval shape. In a preferred embodiment of the According to the invention, the sealing area is designed as a sealing lip made of felt, fleece or a polymer material, particularly preferably an elastic polymer material such as a rubber material or a combination of these materials. Suitable polymer materials are e.g. B. thermoplastic polymers (TPE). A particularly preferred material is ethylene propylene diene rubber (EPDM). In a preferred embodiment of the suction nozzle according to the invention, the first section has an elastic sealing lip, particularly preferably a rubber sealing lip, as the circumferential sealing area. Elastic sealing lips can advantageously adapt to different surface structures, for example wavy and uneven surfaces, and seal them adequately, at least for a good suction result. The first section, but at least the sealing area, particularly preferably the sealing lip, preferably runs essentially around the entire first section in such a way that it essentially completely encloses the suction area on all sides. In another embodiment of the invention, the first section, but at least the circumferential sealing area, has non-sealing recesses. For example, it can have a plurality of sealing lip segments that run along the first section at a regular or irregular distance from one another. In an embodiment of the invention in which the peripheral sealing area has recesses, it acts to sealingly enclose another part of the suction nozzle, e.g. B. the below-mentioned second section together.

In a preferred embodiment of the invention, the sealing area has a plurality of segments, with at least two of the segments being formed from different sealing means. For example, at least one of the segments can be designed as a sealing lip, and at least one other segment as a bristle strip. Preferably, the sealing segments of the sealing area are designed as sealing lips at points that tend to run in the direction of advance when the suction nozzle is used as intended. Preferably, the sealing segments of the sealing area are designed as bristle strips at points that run more perpendicular to the feed direction when the suction nozzle is used as intended. Points of the sealing area, whose tangents enclose an angle of less than 45° with a straight line running along the feed direction, run more in the feed direction. The other points run more perpendicular to the feed direction.

The sealing lip, which runs more in the feed direction, can advantageously seal the suction area particularly well. In addition, by running the sealing lip more in the feed direction, it can be achieved that it is less affected by wear than it would be if it ran more perpendicular to the feed direction. The bristle strips advantageously allow dirt to be picked up more easily in the forward and reverse direction. In addition, it is possible to exploit the fact that a bristle strip is generally less susceptible to wear than a sealing lip due to the material used Bristle strips executed.

In the intended operation of the suction nozzle with a sealing sealing area on a hard floor, the sealing area preferably seals the suction area against the surface to be treated with the vacuum cleaner in such a way that the area through which air flows is less than 10 mm ² (square millimeters). The area through which air flows is particularly preferably less than 5 mm ² , very particularly preferably even less than 2 mm ² , very particularly preferably even less than 2 mm ² , very particularly preferably less than 1 mm ² , very particularly preferably even less than 0, 5 mm ² , most preferably even less than 0.2 mm ² . Here, the hard floor is a hard floor as prescribed for the standard measurement according to IEC 60312-1, Edition 1.1, valid since November 2011. The area through which air flows is the sum of all generally very small areas, for example between adjacent bristles or between the floor covering and a sealing lip or bristle, through which suction air flows when the nozzle is used as intended.

In a preferred embodiment of the suction nozzle according to the invention, the first section with the circumferential sealing area is arranged so that it can move relative to the suction nozzle. A position of the first section is preferably a sealing position in which the first section uses the sealing area to seal off the suction area from the surface to be treated with the vacuum cleaner. Preferably another position of the first portion is an unsealed position. The first section can be displaceable, in particular perpendicular to the surface that is being processed by the suction nozzle. Thus, the suction nozzle can advantageously for different surfaces are used. If, for example, the first section and the circumferential sealing area enclose the suction area in a sealing manner, a hard floor, with or without cracks or joints, can be treated with a high suction effect and a high level of dust absorption. Furthermore, a floor, for example a carpet floor, can be processed when the first section is in a non-sealing position. Here, use is made of the fact that, in the case of a carpeted floor, sealing is generally not advisable due to the air permeability of the carpet structure.

The suction nozzle has a second section for enclosing the suction area. The second section includes recesses, e.g. B. for suction of coarse material, and is movably arranged relative to the suction nozzle. Preferably, a position of the second section is a position in which the second section encloses the suction area. Preferably another position of the second portion is a position in which it does not enclose the suction area. Here, "does not enclose" means that the second section does not significantly restrict the air flow during the intended operation of the suction nozzle.

Recesses can be openings, cutouts, cuts, holes and the like. The second section can e.g. B. as a bristle strip or a sealing lip made of felt, fleece or a polymer material, particularly preferably an elastic polymer material such as a rubber material or a combination of these materials. Suitable polymer materials are e.g. B. thermoplastic polymers (TPE). A particularly preferred material is ethylene propylene diene rubber (EPDM).

In the position of the first section enclosing the suction area, the suction nozzle in one embodiment of the invention can suck in and suck up coarse material or coarse dirt from the immediately adjacent area outside the suction area through the recesses of the second section. In one embodiment of the invention, the first section, in its sealing position, seals the suction area without interacting with the second section. In another embodiment of the invention, when the second portion is in its suction area enclosing position and the first portion is in its suction area sealing position, the second portion cooperates with the first portion to seal the first suction area, e.g . B. by the recesses of the second Section of segments of the sealing area of the first section are closed. In this position, the two sections cooperate in the manner of a toothing in such a way that they seal off the suction area together. Both the first section and the second section preferably have bristle rings with recesses for sealing. Particularly preferably, the width of the segments of the bristle ring of the first section, measured along the circumferential direction between two adjacent recesses, is equal to the corresponding width of the segments of the bristle ring of the second section. The bristles of both sections are particularly preferably of the same length.

By means of the second section, different floor covering categories can advantageously be processed with the same suction nozzle. For example, with a closed first section, ie with a first section that encloses the suction area in a sealed manner, a hard floor, with or without cracks, can advantageously be treated with a good and high suction result. The second section can also enclose the suction area during this processing. However, it is also possible, for example to minimize wear on the second section, to open the second section, ie to move the second section into a position in which it does not enclose the suction area.

The preferred suction nozzle is a floor suction nozzle, i.e. it is suitable for use in vacuuming a floor. In a preferred embodiment, the suction nozzle has at least one, preferably two or more rollers or wheels or cylinders or balls. This advantageously facilitates the movement of the suction nozzle on the floor to be processed.

In certain embodiments according to the invention, the suction nozzle is designed with a coupling section for connection to a suction channel, a hose or a suction pipe. The suction nozzle is preferably equipped with a coupling section for coupling to a suction pipe of a canister vacuum cleaner. The connection can be a plug-in connection, for example with a bayonet lock. Such connections can advantageously be easily detached, for example in order to use different suction nozzles. Different suction nozzles can be designed for different floor coverings.

The area enclosed by the sealing area is preferably wider in one direction, preferably the intended suction direction, than in the direction running transversely thereto, particularly preferably at least twice, particularly preferably at least four times as wide. In its suction area enclosed by the sealing area, the preferred suction nozzle preferably has a suction nozzle sole, with which the suction nozzle rests on the surface to be treated, preferably on a floor.

In a further preferred embodiment of the suction nozzle according to the invention, the suction nozzle has sensors for detecting the surface to be processed. The positioning of the first section and/or the second section and/or the third section can advantageously be controlled in a simple manner by means of sensors and a control device on or in the vacuum cleaner.

In a preferred embodiment of the suction nozzle according to the invention, the first section and/or the second section has an adjustment mechanism for manual or automatic positioning of the section or sections. With an adjustment mechanism, the positioning can advantageously be adjusted easily and reproducibly, in particular as a function of the floor covering to be processed. The adjustment mechanism preferably has an adjustment stage in which the first section is positioned in its position which does not seal off the suction area. The adjustment mechanism preferably has an adjustment stage in which the second section is positioned in its position that does not enclose the suction area and, particularly preferably, the first section is simultaneously positioned in its position that does not seal the suction area (adjustment stage 1). Adjustment level 1 is particularly suitable for processing a carpet. The adjustment mechanism preferably has an adjustment stage in which the second section is positioned in its position enclosing the suction area. The adjustment mechanism preferably has an adjustment stage in which the second section is positioned in its position enclosing the suction area and, particularly preferably, at the same time the first section is positioned in its position sealingly enclosing the suction area in cooperation with the second section (adjustment stage 2a). In another preferred embodiment of the invention, the second portion is positioned in its position not enclosing the suction area and, at the same time, the first Positioned section in its position sealingly enclosing the suction area (adjustment stage 2b). The adjustment stages 2a and 2b are particularly suitable for working on a hard floor with joints. The adjustment mechanism preferably has an adjustment stage in which the second section is positioned in its position enclosing the suction area and, particularly preferably, at the same time the first section is positioned in its position not sealing the suction area (adjustment stage 3). Adjustment level 3 is particularly suitable for working on a hard floor without joints.

In a preferred embodiment of the suction nozzle according to the invention, the adjustment stages are controlled by a two-, three- or four-stage lever, e.g. B. in the form of a foot switch, can be actuated as operating means. A three-stage lever with the above-mentioned adjustment stages 1, 2 (in one embodiment 2a, in another 2b) and 3 is preferably used. Alternatively, two levers, e.g. B. foot switch, conceivable, one of which can move the first section and the second section back and forth between their two positions. In one embodiment of the invention, the adjusting mechanism has at least one electric motor, for example a stepping motor.

Brief description of the drawings

Further advantageous configurations are described in more detail below with reference to exemplary embodiments illustrated in the drawings, to which the invention is not restricted, however.

The reference signs in all the claims do not have any limiting effect, but are only intended to improve their readability.

• Fig. 1 eine seitliche Ansicht eines Staubsaugers mit schematischer Darstellung des Gehäuseinneren und einer erfindungsgemäßen Saugdüse;
• Fig. 2a, b, c Teilschnitte einer nicht erfindungsgemäßen Saugdüse mit einem ersten Abschnitt in unterschiedlichen Positionen auf einem Bodenbelag;
• Fig. 3a, b, c Teilschnitte einer erfindungsgemäßen Saugdüse mit einem ersten, einem zweiten und einem dritten Abschnitt in unterschiedlichen Positionen auf einem Bodenbelag;
• Fig. 4 eine Borstenkranzform gemäß dem Stand der Technik;
• Fig. 5a, b, c unterschiedliche Borstenkranzformen der erfindungsgemäßen Saugdüse; und
• Fig. 6a, b, c, dvier Ansichten einer erfindungsgemäßen Saugdüse mit einem Dichtbereich, der Dichtlippen und Borstenstreifen aufweist. Fig. 6a ist eine Ansicht von oben, Fig. 6b eine Ansicht von unten, Fig. 6c eine Ansicht von vorne und Fig. 6d eine Seitenansicht der Düse.

They show schematically:

• 1 a side view of a vacuum cleaner with a schematic representation of the housing interior and a suction nozzle according to the invention;
• Figures 2a,b,c Partial sections of a suction nozzle not according to the invention with a first section in different positions on a floor covering;
• Figures 3a,b,c Partial sections of a suction nozzle according to the invention with a first, a second and a third section in different positions on a floor covering;
• 4 a bristle ring form according to the prior art;
• Figures 5a,b,c different bristle ring shapes of the suction nozzle according to the invention; and
• Figures 6a,b,c , d four views of a suction nozzle according to the invention with a sealing area that has sealing lips and bristle strips. Figure 6a is a view from above, Figure 6b a view from below, Figure 6c a front view and Figure 6d a side view of the nozzle.

Detailed description based on examples

In the following description of preferred embodiments of the present invention, the same reference symbols denote the same or comparable components. the inside 1 The vacuum cleaner 1 shown consists of a subframe 2, the housing 3 of which accommodates a suction fan 4 driven by an electric motor. The suction fan 4 is flow-connected upstream to a separating device 5 which accommodates a replaceable dust filter bag 6 . A suction line 7 let into the housing 3 opens into the dust filter bag 6 and in turn interacts with a suction nozzle 10 via a flexible suction hose 8 and a telescoping suction pipe 9 . To clean floor coverings, the suction nozzle 10 is placed on the surface to be cleaned and moved back and forth after the suction fan 4 is switched on. The dust on the floor is sucked into the separating device 5 together with air close to the floor and is separated in the dust filter bag 6 , with a negative pressure forming in the flow channel between the suction nozzle 10 according to the invention and the separating device 5 . The cleaned one Air flow is guided through the suction fan 4 and escapes through an exhaust opening 11 in the housing 3 in the direction of the arrow 12.

Figure 2a shows a partial sectional representation of a suction nozzle 10 not according to the invention with a suction nozzle upper shell 13, a first section 14 and a suction nozzle sole 15. The suction nozzle 10 is positioned on a floor covering 16. The floor covering 16, in particular a hard floor covering, has joints or cracks 17 in a longitudinal direction perpendicular to the plane of the drawing.

By means of a suction channel 18, the suction nozzle 10 is connected to a suction pipe 9 (see 1 ), or optionally directly to a suction hose 8 (see 1 ), connected. After applying a negative pressure using the fan 3 (see 1 ) of the vacuum cleaner 1, dust, fine material, coarse material, etc. can be sucked in through the suction channel 18 and a nozzle opening 19 from the floor covering 16 and sucked out of the joints 17. The suction nozzle upper shell 13 serves in particular to protect and cover the other components of the suction nozzle 10.

Furthermore, in Figure 2a a first section 14 of the suction nozzle 10 not according to the invention is shown with a circumferential sealing area 20 . In this example, the sealing area is designed as a completely circumferential rubber lip without cutouts. The first section is in its sealing position, in which the peripheral sealing area 20 seals a suction area 21 against the floor covering 16, but does not close the joints or cracks. The joints or cracks 17 can protrude beyond the sealing area 21, so that the negative pressure in the suction area 21 sucks in dust, fines, etc. from the joints or cracks 17 beyond the suction area 21, at least in the edge areas of the suction area 21.

Due to the suction nozzle 10 not according to the invention with the first section 14 and the circumferential sealing area 20, it is possible to apply a high negative pressure in the suction area 21 and to achieve a good and high suction result with a high level of dust absorption, especially in the joints 17. In particular, by means of the first section 14 with the circumferential sealing area 20, an inflow of air from the environment 22, and thus a possible lowering of the negative pressure in the suction area 21, can be prevented.

The circumferential sealing area 20 can be connected to the first section 14, for example by means of gluing, but it can also be an integral part of the first section 14. The circumferential sealing area 20 can also be a felt lip, a fleece lip, a ring of bristles or the like instead of a rubber lip.

Figure 2b shows the suction nozzle 10 Figure 2a in an open, i.e. non-sealing position of the first section 14. The first section 14, together with the circumferential sealing area 20, is shifted vertically upwards, i.e. perpendicular to the floor covering 16 (indicated by arrows 23) and does not seal the suction area 21 against the floor covering 16 away. The floor covering 16 has in the embodiment of Figure 2b no joints. Floor covering 16 is in Figure 2b designed in particular as a carpet floor covering or for the arrangement of the suction nozzle in Figure 2b particularly suitable for carpet flooring. The arrangement of the suction nozzle 20 in Figure 2b but can also be used to vacuum hard floors. For example, coarse dust particles or coarse material can be sucked in from the immediate surroundings 22 . Due to the suction area 21 being open to the environment 22, the negative pressure is comparatively low compared to the arrangement Figure 2a . The lower negative pressure can be sufficient for a good suction result for the floor covering 16 without joints and cracks.

Figure 2c shows the suction nozzle 10 Figure 2b in a closed position or a closed position of the first section 14. Opposite to Figure 2a the floor covering 16 has no joints or cracks. The first section 14 encloses the suction area 21 and seals it off because of the circumferential sealing area 20 resting on the floor covering 16. The floor covering 16 is in Figure 2c designed in particular as a hard floor covering. In the position of the suction nozzle Figures 2a and 2c the suction nozzle sole 15 is raised relative to the floor covering in order to prevent the floor covering from being scratched. This position of the suction nozzle is particularly suitable for hard floor coverings, with or without cracks.

Figures 3a to 3c show a partial sectional view of a suction nozzle 10 according to the invention with a first section 14, a second section 24 and a suction nozzle upper shell 13 on a floor covering 16. In Figure 3a is both the first Section 14 and the second section 24 are arranged in an open position. In the open position, air can flow into the suction area 21 from the environment 22 . In this position, coarse dirt and the like that is on the floor covering 16 outside of the suction area 21 can be sucked in and sucked up. Floor covering 16 is in Figure 3a in particular designed as a carpet floor covering or for the arrangement of the suction nozzle according to the invention in Figure 3a particularly suitable for carpet flooring.

Figure 3b shows the suction nozzle Figure 3a with a closed first section 14, ie the first section 14 is in a position in which it encloses the suction region 21 in a sealing manner. For this purpose, the peripheral sealing area 20 of the first section 14 rests against the surface of the floor covering 16 and thus seals the suction area 21 against the environment 22 . The second section 24 is in the open state or in the open position, ie the second section does not significantly restrict the air flow during the intended operation of the suction nozzle. Floor covering 16 is in Figure 3b designed in particular as a hard floor covering or for the arrangement of the suction nozzle according to the invention in Figure 3b Particularly suitable for hard floor coverings, especially for hard floors with cracks. The fact that the suction nozzle sole 15 is raised relative to the floor covering also contributes to this in order to prevent the floor covering from being scratched.

3c shows the suction nozzle Figure 3a with a closed second section 24. The first section 14 is in the open state or in the open position. The peripheral sealing area 20 does not lie against the surface of the floor covering 16 .

The second section 24 has recesses for sucking up coarse dirt, coarse dust or coarse material from the immediate surroundings 22 outside of the suction area 21 . The second section 24 can be a bristle collar, a felt collar, a fleece collar, a rubber collar, a plastic collar or the like, with or without cutouts.

The arrangement of the suction nozzle according to the invention in 3c is particularly suitable for hard floor coverings, especially hard floors without cracks. The fact that the suction nozzle sole 15 is raised relative to the floor covering also contributes to this in order to prevent the floor covering from being scratched. With a foot switch, not shown, the Suction nozzle between the three in the Figures 3a to 3c reproduced positions of the sections can be switched.

4 shows a ring of bristles 25 for a suction nozzle 10 according to the prior art. The ring of bristles 25 has recesses 26 for sucking up coarse dust from the immediate vicinity of a suction area.

Figure 5a shows a form of a first portion 14 of the suction nozzle 10 according to the invention from FIGS Figures 3a to 3c with a circumferential sealing area 20 designed as a rubber lip. This embodiment of the first section 14 is particularly suitable and can be used for vacuuming on hard floor coverings. Figure 5b shows a shape of a second section 24 of the suction nozzle 10 according to the invention from FIGS Figures 3a to 3c .

In this exemplary embodiment, the second section 24 has recesses for sucking up coarse dust from the immediate vicinity of a suction area. The use of this second section 24 in a closed, circumferential arrangement around a suction area is particularly suitable and usable for vacuuming on hard floor coverings and for sucking up coarse dust from the immediate vicinity of a suction area.

An alternative embodiment of a suction nozzle 10 according to the invention is in Figure 5c shown. The figure shows a first 14 and a second section 24, which are each formed in segments with intermittent recesses. The segments engage in one another in the manner of a toothing such that the segments of one section engage in the recesses of the other section in order to close them. The first section 24 is in a position in which it seals off the suction area 21 . The first section 14 is in the unsealed position. In this position z. B. coarse dirt through the recesses in the second section 24 are announced. The first section 14 can be slid into the sealing position in which the segments of the first section 14 close the recesses of the second section 24 .

The in the Figures 6a to 6d The suction nozzle 10 according to the invention shown has a sealing area with a plurality of segments 20a and 20b. The suction area 21 surrounded by the sealing area is essentially rectangular, with the longitudinal direction of the rectangle during intended use of the vacuum cleaner runs perpendicular to the feed direction. The side segments of the sealing area running in the suction direction are designed as a rubber lip and the segments running perpendicularly thereto are designed as bristle strips. The bristle strips allow dirt to be picked up more easily in the forward and reverse direction. The sealing lips seal particularly well at the sides.

The features disclosed in the above description, the claims and the drawings can be important both individually and in any combination for the implementation of the invention in its various configurations.

Reference List

1

vacuum cleaner

2

subframe

3

housing

4

suction fan

5

separation device

6

dust filter bag

7

suction line

8th

suction hose

9

intake manifold

10

suction nozzle

11

exhaust vent

12

arrow (exhaust air flow)

13

suction nozzle shell

14

first section

15

suction nozzle sole

16

flooring

17

joints or cracks

18

suction channel

19

nozzle opening

20, 20a, 20b

sealing area

21

suction area

22

vicinity

23

Direction of movement of the first area

24

second part

25

bristle ring shape

26

recesses

27

third section

Claims (13)

1. Suction nozzle (10) for a vacuum cleaner (1), wherein the suction nozzle (1) has a suction duct (18) and at least one first section (14) for surrounding a suction region (21) of the suction nozzle (10), and wherein the first section (14) can surround the suction region (21) in a sealing manner, and the first section (14) has a circumferential sealing region (20) for sealing the suction region (21) against a surface to be processed with the vacuum cleaner (1), and wherein the suction nozzle (10) has a second section (24) for surrounding the suction region (21), wherein the second section (24) comprises cut-outs and is arranged in a movable manner with respect to the suction nozzle (10), characterised in that the suction nozzle (10) has a third section (27), wherein the third section (27) is arranged in a movable manner with respect to the suction nozzle (10) and with respect to the first (14) and second (24) section.
2. Suction nozzle (10) according to claim 1, characterised in that the circumferential sealing region (20) has an elastic sealing lip.
3. Suction nozzle (10) according to one of the preceding claims, characterised in that in the intended operation of the suction nozzle (10) with a sealing sealing region (20) on a hard floor, the sealing region (20) seals the suction region (21) against the surface to be processed with the vacuum cleaner (1) so that the surface through which air passes is less than 10 square millimetres.
4. Suction nozzle (10) according to one of the preceding claims, characterised in that the first section (14) with the circumferential sealing region (20) is arranged in a movable manner with respect to the suction nozzle (10).
5. Suction nozzle (10) according to one of the preceding claims, characterised in that the third section (27) is embodied segmented in the circumferential direction and is arranged in a movable manner with respect to the suction nozzle (10).
6. Suction nozzle (10) according to one of the preceding claims, characterised in that the first section (14) is arranged in at least one position in that the first section (14) covers at least a subregion of the second section (24) and/or the third section (27).
7. Suction nozzle (10) according to one of the preceding claims, characterised in that the second section (24) is or has a soft bristled ring.
8. Suction nozzle (10) according to one of the preceding claims, characterised in that the suction nozzle (10) has rollers or wheels or barrels or balls.
9. Suction nozzle (10) according to one of the preceding claims, characterised in that the suction nozzle is equipped with a coupling section for connection to a suction pipe.
10. Suction nozzle (10) according to one of the preceding claims, characterised in that the suction nozzle (10) has sensors for detecting the surface (16) to be processed.
11. Suction nozzle (10) according to one of the preceding claims, characterised in that the first section (14) and/or the second section (24) and/or the third section (27) has an adjusting mechanism for manual or automatic positioning.
12. Suction nozzle (10) according to claim 11, characterised in that the adjusting mechanism has at least two adjustment levels.
13. Suction nozzle (10) according to claim 11 or 12, characterised in that the adjusting mechanism has at least one electric motor.

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