Grounding nozzle for a vacuum cleaner

Abstract

The invention relates to a ground nozzle (1) for a vacuum cleaner (2), having a bottom side (6) with a suction opening (7) through which dirt is sucked from the ground in operation. The suction opening (7) is delimited in the direction of movement (5) of the ground nozzle (1) by two opposite edges (9, 10), at least one of which is toothed. Thereby, a higher comfort and at the same time a better cleaning result is achieved, namely that in at least one of the edges (9, 10) the tooth space (15) pointing away from the suction opening (7) protrudes maximally in the height direction (11) and thus lies in the contact plane with the flat ground.

Description

Technical Field

[0001] The present invention relates to a grounding nozzle for vacuuming the floor, the grounding nozzle having a bottom side with a suction opening defined by an edge. Background Technology

[0002] The vacuum cleaner generates a suction flow during operation, which can suck up dirt particles from the ground to clean it. For this purpose, the vacuum cleaner has a grounding nozzle that sucks up dirt particles from the ground through a suction opening constructed in the bottom side facing the ground.

[0003] The bottom side of such grounding nozzles is typically constructed to be flat and level. Because suction power increases as the suction opening becomes increasingly sealed at the floor, thus improving cleaning efficiency, the edges defining the suction opening at the bottom of the grounding nozzle are usually constructed as flat and level as possible to achieve this seal and thus increase suction power. A disadvantage when suctioning carpeted or fully carpeted surfaces is that these edges generate high mechanical resistance through their interaction with the floor fibers, thus increasing the thrust required to move the grounding nozzle in the intended direction of motion. This results in higher effort required when the grounding nozzle is manually moved by the user, and therefore reduces user comfort.

[0004] GB 431 697 A provides a grounding nozzle with a comb-like protrusion on its underside extending outward toward the floor to be vacuumed. The purpose of the comb-like protrusion is to divide the carpet into sections so that air can be vacuumed through these sections separately. However, this results in reduced suction power and an increased thrust required to move the grounding nozzle.

[0005] US 2001 / 0 027 587 A1 discloses a grounding nozzle having channels that are laterally spaced and separated from each other in the direction of movement at the edge defining the boundary of the suction opening, the channels leading into the suction opening. The purpose of the channels is to generate eddies in the region of the suction opening, thereby improving suction efficiency. Furthermore, for better cleaning, a roller with brushes protruding from the suction opening is arranged in the grounding nozzle, the roller rotating as the grounding nozzle moves.

[0006] A grounding nozzle is known from DE 34 35 661 A1. This grounding nozzle has a flat bottom side in which a suction opening for suctioning waste is formed. In a predetermined direction of movement of the grounding nozzle along the ground, a forward edge along the direction of movement and a rear edge opposite the forward edge along the direction of movement define the boundary of the suction opening. The suction opening has a plurality of comb-like structures that are laterally turned to each other and circular in the direction of movement, such that the forward and rear edges have teeth oriented towards the suction opening in the direction of movement and grooves arranged laterally between the teeth. For engagement, channels are alternately provided from the forward and rear edges, inclined in the direction of movement, which respectively extend from the end side of the grounding nozzle to the corresponding comb-like structures.

[0007] A grounding nozzle with a bottom side is known from DE 10 2008 021 353 A1. The bottom side has a suction opening. The suction opening is defined by a front edge and a rear edge. Each edge may have a dirt-catching element that narrows away from the suction opening and thus has a hollow area for catching dirt particles. The dirt-catching elements are separated from each other by a gap or a space, transverse to the direction of movement of the grounding nozzle, thus forming an opening between the dirt-catching elements that leads to the suction opening.

[0008] A grounding nozzle with a suction opening is known from DE 44 39 427 A1. The suction opening is bounded by a vortex generator having a side protruding toward the ground to be suctioned. The corresponding side of the vortex generator tapers gradually away from the suction opening and thus forms grooves facing away from the suction opening. Summary of the Invention

[0009] The objective of this invention is to describe an improved or at least other embodiment of the grounded nozzle of the type described at the beginning of this document, which is characterized by particularly improved user comfort and improved cleaning performance.

[0010] This task is solved according to the invention by the subject matter of independent claim 1. Advantageous embodiments are the subject matter of the dependent claims.

[0011] This invention is based on the general idea that the edge defining the boundary of the suction opening along the direction of movement of the grounding nozzle is toothed, thus the edge has teeth pointing towards the suction opening and grooves pointing away from the suction opening along the direction of movement of the grounding nozzle. Here, the grooves are arranged so that they form the area on the bottom side that protrudes to the ground the most. This results in the grooves being in contact with the ground when the grounding nozzle is placed on a flat or level surface, while the other areas on the bottom side, especially the teeth, are spaced apart from the ground. Therefore, the contact area between the bottom side of the grounding nozzle and the ground is reduced, and thus the total contact area between the grounding nozzle and the ground is reduced. This reduces the required force and therefore the thrust required when the grounding nozzle moves along the direction of movement. If the grounding nozzle moves along a carpet or full carpet, the protruding teeth further result in the edge not making straight contact with the fibers of the ground, and the fibers are able to move accordingly in the plane of the bottom side due to the protruding shape of the teeth. This also reduces mechanical resistance during movement in the direction of motion, and thus reduces the required thrust. This improves user comfort and reduces energy consumption for moving the grounding nozzle. Furthermore, the teeth are spaced far apart from the ground by arranging the grooves. This creates a ramp leading to the suction opening between the grooves and teeth in the direction of motion, resulting in better suction and allowing for better collection of dirt particles with greater extension length, especially large dirt. The arrangement of the teeth towards the suction opening in the direction of motion creates vortices when drawing in air during operation, leading to better suction and thus better cleaning. The ramp also causes the fibers to move at a certain height during movement in the direction of motion, allowing the fibers to move in three directions overall and thus be more effectively sucked up. In addition, the orientation of the edges with teeth and grooves increases the total length of the edges. Therefore, when vacuuming carpets or full-coverage carpets, the total contact area of ​​the fibers with the ground increases, and therefore the fibers moving through the edges become larger. Therefore, better cleaning results were achieved overall when the required thrust was reduced.

[0012] The grounding suction nozzle, corresponding to the inventive concept, has a bottom side, which can also be referred to as the nozzle bottom. During operation, the bottom side faces the ground to be suctioned. A suction opening is constructed in the bottom side and is used to suction out contaminants during operation. In a predetermined direction of movement, the suction opening at the bottom side is defined by a forward edge and a rear edge opposite to the forward edge along the direction of movement. Here, at least one of the edges has teeth pointing towards the suction opening parallel to the direction of movement and tooth grooves pointing away from the suction opening. Here, the tooth grooves and teeth are sequentially arranged laterally to the direction of movement. According to the invention, at least one tooth groove of at least one edge, preferably the corresponding tooth groove, is arranged in a contact plane that protrudes maximally towards the ground along both the height direction and the direction of movement. Therefore, the relevant edge slopes downward towards the teeth along the height direction, so that at least one tooth groove is placed on the ground and the teeth are spaced apart from the ground when the grounding suction nozzle is placed on a flat surface.

[0013] The teeth and tooth grooves that are sequentially arranged laterally turn into each other via the side surfaces of the associated edges. The teeth and tooth grooves are thus appropriately components of the side surfaces.

[0014] The sides turn into each other advantageously and without interruption. This specifically means that the edges have no gaps, openings, or the like. Therefore, the surface embedded in the fibers of the carpet or carpet wall to be cleaned becomes particularly large. This results in a more effective cleaning.

[0015] Preferably, at least one of the sides, particularly the corresponding side, forms an angle of less than 90° with the direction of movement. The corresponding side therefore preferably extends obliquely to the direction of movement. This results in less mechanical resistance during movement along the direction of movement when the grounding nozzle moves on the fibers, and thus less thrust is required.

[0016] The angle is advantageously less than 80°, particularly preferably less than 60°, for example 45°.

[0017] Preferably, the teeth and tooth grooves are arranged alternately in the transverse direction. In particular, the teeth separate consecutive tooth grooves from each other in the transverse direction, and vice versa.

[0018] Here, the teeth and grooves of the corresponding edges can be constructed uniformly and distributed. In particular, the teeth and grooves of the corresponding edges can be constructed identically and arranged equidistantly from each other. It is also conceivable that the teeth and gaps can be constructed and / or arranged unevenly and / or irregularly.

[0019] Parallel to the direction of motion, in the context of current usage, refers to being parallel to or offset from the direction of motion, both along the direction of motion and relative to it.

[0020] At least one, advantageously corresponding, tooth groove's bottom surface is preferably arranged in the contact plane, and the tooth groove is further spaced apart from the contact plane. The bottom surface of the tooth groove is the area of ​​the tooth groove that is parallel to the direction of movement and extends outwards. That is to say, the area of ​​at least one, advantageously corresponding, tooth groove that is parallel to the direction of movement and extends outwards is located in the contact plane and therefore protrudes maximally in the direction of the ground. This results in a larger distance between the remaining suction openings and the contact plane and a smaller contact area. Therefore, this leads to a further reduction in the required thrust and improved cleaning performance.

[0021] At least one, preferably the corresponding tooth, of the tooth tip advantageously protrudes into the suction opening. The tooth tip is the area of ​​the tooth parallel to the direction of movement. This corresponding tooth tip thus creates a noticeable and advantageous vortex when air is drawn into the suction opening, resulting in a better cleaning effect. Furthermore, this allows the fibers of the carpet or carpeted surface to move and be compressed with reduced mechanical resistance. Therefore, the result is a reduction in the thrust required to move the grounded nozzle along the carpet or carpeted surface while improving cleaning performance.

[0022] The edges of the toothed nozzle can be wavy or serrated. In a wavy shape, the tips and bottom surfaces of the tooth grooves are curved. This reduces the mechanical resistance and compression of the carpet or carpet fibers. Consequently, the thrust required to move the nozzle along the carpet or carpet is reduced. In a serrated shape, the tips and bottom surfaces of the tooth grooves are either pointed or have at least one less pronounced curve than in a wavy shape. The corresponding edges can, of course, be partially wavy and partially serrated.

[0023] The grounding nozzle is designed for movement in the direction of motion. For this purpose, the grounding nozzle may have at least one roller that can roll in the direction of motion. The grounding unit of a related vacuum cleaner (of which the grounding nozzle is a component) may also have at least one such roller. The bottom side of the grounding nozzle may optionally or additionally have a width extending laterally, which is greater than the length of the bottom side extending in the direction of motion. The width is, for example, at least twice the length.

[0024] The grounding nozzle may have a tube spaced vertically from the suction opening, through which the grounding nozzle is connected to or detachably connected to the suction unit of a related vacuum cleaner. The tube thus serves as a suction channel. Here, the suction opening may be in fluid communication with the internal volume of the grounding nozzle or directly with the tube.

[0025] To simplify the movement of the grounding nozzle along the direction of motion, the grounding nozzle and / or associated grounding unit may have at least one hinge, advantageously two hinges, which, in particular, result in better and / or simplified and / or targeted movement along the direction of motion when forces are applied to the tube body to move the grounding nozzle.

[0026] In a preferred embodiment, at least one tooth, advantageously the corresponding tooth, protrudes into the suction opening along the direction of movement. This results in a smaller required structural space and thus a smaller size of the grounding nozzle along the direction of movement while generating vortices as described above, and results in contact with and compression of the fibers of the carpet or carpeted floor.

[0027] In a preferred embodiment, at least two grooves of at least one edge are arranged in the contact plane. Here, a recess is constructed between laterally adjacent grooves, embedded vertically into the bottom side. This recess thus separates the laterally adjacent grooves from each other in the contact plane. Therefore, the contact area with the flat ground is limited to the grooves, and thus the entire contact surface is further reduced. Consequently, there is particularly localized, for example, point-like contact with the ground in the region of the grooves. Therefore, the contact surface is reduced, and thus the required thrust is further reduced.

[0028] Preferably, a corresponding recess is constructed between each pair of transversely consecutive tooth grooves. That is, the tooth grooves and the recesses are transversely consecutive.

[0029] Advantageous embodiments include those in which at least one recess leads into a corresponding tooth arranged between tooth grooves, with the recess positioned between the tooth grooves. That is, the recess connects to the suction opening via the corresponding tooth. Preferably, the recess extends into the corresponding tooth. Particularly advantageously, the tooth is part of the corresponding recess. The recess is thus configured as a channel for fluid communication with the corresponding tooth and therefore with the suction opening. This results in better suction and thus simplified and improved suction of larger particles, particularly coarse particles.

[0030] Particularly advantageous are embodiments in which corresponding recesses extend into the corresponding teeth of the tooth. Thus, the bottom side has successive recesses along the transverse direction serving as channels, each recess extending vertically into the bottom side.

[0031] If the recess extends into the corresponding teeth, it causes the recess to gradually narrow laterally within the area of ​​the corresponding teeth, extending in a funnel shape, particularly in that area. Therefore, air is better drawn in through the recess and the funnel-shaped orientation. Furthermore, larger particles of dirt, especially coarse dirt, can be drawn into the suction opening more easily and effectively through the recess and teeth in this way. This correspondingly improves cleaning performance while simultaneously reducing the required thrust.

[0032] The corresponding recess can, in principle, extend arbitrarily with respect to the direction of movement.

[0033] Preferred embodiments include at least one recess, advantageously parallel to the direction of movement. This minimizes or at least reduces the portion of the recess parallel to the direction of movement. This results in reduced mechanical resistance caused by the recess as the grounding nozzle moves along the direction of movement. Consequently, the required thrust is reduced. Furthermore, this reduces the distance between the end of the recess furthest from the suction opening and the suction opening. Therefore, it allows for better suction of dirt particles, particularly coarse dirt.

[0034] At least one of the recesses, advantageously, the corresponding recess slopes downward in the height direction parallel to the direction of movement and away from the associated tooth. The end of the recess furthest from the associated tooth is particularly the region of the recess furthest from the contact surface in the height direction. The recess slopes downward particularly uniformly in this region. Therefore, dirt particles with a large extension length, especially coarse dirt, can easily enter the recess from the end of the recess furthest from the associated tooth and be precisely drawn into the suction opening through the recess.

[0035] Alternatively or additionally preferred, the bottom side extends obliquely away from the ground on the side of the tooth groove facing away from at least one of the edges along the direction of movement. That is, the suction opening is arranged in the suction section of the bottom side, wherein an outer section of the bottom side is arranged adjacent to the suction section along the direction of movement, the outer section being obliquely relative to the suction section and extending away from the ground along the height direction from the suction section. Therefore, dirt particles, especially coarse dirt, reach the suction opening more effectively through the outer section. This achieves better cleaning results.

[0036] In an advantageous embodiment, at least one of the toothed grooves opens into a corresponding pocket on its side facing away from the ground, wherein the pocket opens outward and closes inward along the height direction. The corresponding toothed groove preferably opens into such a corresponding pocket. The pocket is hereby suitably open towards the inner volume or tube on its side facing the suction opening along the direction of movement. The corresponding pocket generates a vortex that results in better cleaning when air is drawn in.

[0037] Corresponding pockets are suitably constructed in the inner wall of the grounding nozzle, extending both vertically and laterally, the inner wall defining the boundary of the inner volume or tube and adjacent to the relevant edges. Within the inner wall, these laterally successive pockets can be separated from each other by closed and / or flattened separation sections of the inner wall.

[0038] The relevant tooth tips are preferably parallel to the direction of movement and positioned above the relevant separation section along the height direction, that is, protruding on the side of the separation section facing away from the ground. The relevant tooth tips advantageously protrude from the corresponding separation section. The vortices generated by the tooth tips and the pockets thus combine synergistically and therefore improve the cleaning effect.

[0039] Preferably, at least one of the at least three recesses, advantageously corresponding recesses, extends from the associated tooth to the end side of the grounding nozzle, said end side being arranged on the side of the recess opposite to the suction opening. The end of the recess away from the suction opening is particularly capable of entering into or being constructed within the associated end side. Therefore, as the grounding nozzle moves in the direction of movement, dirt particles, especially coarse dirt, easily enter the recess and thus easily and specifically enter the suction opening through the recess. This results in a better cleaning effect.

[0040] Advantageously, a lint take-up device is arranged on the side opposite to the suction opening of at least one of the edges. The lint take-up device is designed such that it lifts the fibers as it slides along the fibers while the grounded nozzle moves in the direction of motion. The lint take-up device extends in a transverse strip shape, thus achieving better cleaning results.

[0041] In an advantageous embodiment, the take-up piece is arranged in at least two consecutive recesses along the height direction. Specifically, the take-up piece extends in a wavy pattern following the direction of the consecutive recesses. As a result, the take-up piece acts on the fibers at different heights, causing the fibers to rise or fall at different heights. Correspondingly, the intake air can flow better through the fibers and thus clean them more effectively. This results in a better cleaning effect.

[0042] In principle, both the front and rear edges can have the teeth and grooves of the aforementioned type. It is also conceivable that only one edge among the edges can be constructed in this way.

[0043] One could consider, for example, embodiments in which only the front edge has the teeth and grooves of the type described. Correspondingly, the rear edge may extend straight in the transverse direction. The front edge here is particularly an edge that is arranged in front of the rear edge in a predetermined direction of movement. The front edge is especially the edge of the tube body that is away from the grounding nozzle in the direction of movement.

[0044] Preferably, at least one tooth and / or at least one groove in the tooth socket, preferably the corresponding tooth and / or the corresponding groove, has a rounded shape, with the edges particularly configured to be wavy. This results in less resistance when in contact with the fiber and thus less thrust required. Furthermore, this prevents or at least reduces fiber damage.

[0045] Grounding nozzles can, in principle, be non-removably mounted on a vacuum cleaner. It is also conceivable that grounding nozzles can be detachably mounted or mounted on a particular vacuum cleaner. In particular, the grounding nozzle can be an integral part of a grounding unit, which is connected to or can be connected to the relevant vacuum cleaner.

[0046] Grounded nozzles advantageously relate to static grounded nozzles. This specifically refers to grounded nozzles that do not have turbine nozzles and / or electrically driven nozzles. Therefore, grounded nozzles can be manufactured simply and cost-effectively while achieving the desired reduction in thrust and improvement in cleaning performance.

[0047] Further important features and advantages of the invention will be apparent from the dependent claims, the drawings, and the accompanying description with reference to the drawings.

[0048] Of course, the features described above and those to be explained below can be used not only in the combination described accordingly, but also in other combinations or individually, without departing from the scope of the invention.

[0049] Preferred embodiments of the present invention are shown in the accompanying drawings and explained in more detail in the following description, wherein the same reference numerals denote the same or similar or functionally identical components. Attached Figure Description

[0050] Figure 1 The diagram schematically shows a view of the grounding nozzle from below;

[0051] Figure 2 Schematic illustration in Figure 1 A cross-section of the grounding nozzle in the plane marked with II;

[0052] Figure 3 Schematic illustration in Figure 1 A cross-section of the grounding nozzle in the plane marked with III;

[0053] Figure 4 The diagram schematically shows a view of the grounding nozzle from below in another embodiment;

[0054] Figure 5 Schematic illustration in Figure 4 A cross-section of the grounding nozzle in the plane marked with V;

[0055] Figure 6 Schematic illustration in Figure 4 A cross-section of the grounding nozzle in a plane marked with VI;

[0056] Figure 7 Schematic illustration in Figure 4 A cross-section of the grounding nozzle in the plane marked VII;

[0057] Figure 8 Schematic illustration Figure 4 An isometric view of the bottom side of the grounding nozzle;

[0058] Figure 9 The diagram schematically shows a partially transparent isometric view of the grounding nozzle in operation. Detailed Implementation

[0059] For example in Figures 1 to 9 The grounding nozzle 1 shown is a component of the grounding unit 3 of a vacuum cleaner 2 (not shown elsewhere). In the illustrated embodiment, a static grounding nozzle 1 is involved, which does not have a turbine nozzle, an electrically driven nozzle, or similar nozzles. The grounding nozzle 1 shown also does not have a roller equipped with brushes that rotates during operation. The grounding nozzle 1 is used to vacuum clean... Figure 3 and 5 And the ground 4 shown in 9. For this purpose, the grounding nozzle 1 is in fluid communication with, or can be in fluid communication with, a suction unit (not shown) of the vacuum cleaner 2, which generates a suction flow during operation. The grounding nozzle 1, and in particular the grounding unit 3, can be detachably mounted on the associated vacuum cleaner 2. The grounding nozzle 1 is designed to move along the ground 4 in the direction of movement 5. For this purpose, the grounding nozzle 1, and in particular the grounding unit 3, may have rollers (not shown).

[0060] The grounding nozzle 1 has a bottom side 6, in Figure 1 and 4 The bottom side can be seen in the top view. The bottom side 6 is in operation and therefore faces the ground 4 for suction. The grounding nozzle 1 has a suction opening 7 constructed in the bottom side 6. In the illustrated embodiment, the suction opening 7 extends slightly elongated along a transverse direction 8 transverse to the direction of movement 5. The suction opening 7 is bounded along the direction of movement 5 by a front edge 9 and a rear edge 10. The suction opening 7 extends along a height direction 11 transverse to the direction of movement 5 and transverse to the transverse direction 8 and on the side facing away from the ground 4 via an inner volume 12 into the tube body 13. The grounding nozzle 1 can be detachably connected to the suction unit of the vacuum cleaner 2 via the tube body 13. The tube body 13 thus serves as a suction channel. In the illustrated example, the tube body 13 is smaller than the suction opening 7 along the transverse direction 8 and is centrally arranged relative to the suction opening 7.

[0061] At least one of the edges 9 and 10 has a tooth 14 oriented towards the suction opening 7 parallel to the direction of movement 5 and a tooth groove 15 oriented away from the suction opening 7 parallel to the direction of movement 5. The teeth 14 and tooth grooves 15 of the corresponding edges 9 and 10 are alternately and continuously arranged along the transverse direction 8. A tooth groove 15 is thus arranged between two adjacent teeth 14 along the transverse direction 8, and a tooth 14 is arranged between two adjacent tooth grooves 15 along the transverse direction 8. The corresponding tooth groove 15 has a tooth groove bottom surface 16, which is the outer region of the corresponding tooth groove 15 parallel to the direction of movement 5. The corresponding tooth 14 has a tooth tip 17, which is the outer region of the corresponding tooth parallel to the direction of movement. The teeth 14 and tooth grooves 15 turn towards each other via the side surfaces 18 of the corresponding edges 9 and 10. Here, in the illustrated embodiment, the side surfaces 18 turn towards each other without interruption. The side surfaces 18 extend obliquely to the direction of movement 5. In particular, the corresponding side surfaces 18 and the direction of movement 5 form an angle of less than 90°. In the illustrated embodiment, the angle between the corresponding side 18 and the direction of movement 5 is purely exemplary at 45°. At least one of the at least one toothed grooves 15, in the illustrated embodiment, the corresponding toothed groove 15, particularly the corresponding toothed groove bottom surface 16, protrudes along the height direction 11 toward the ground 4 and is arranged in a contact plane 19 that protrudes maximally toward the ground 4, the contact plane being in… Figure 3 and 5 As shown in the diagram. Contact plane 19 here refers to a plane that, when the grounding nozzle 1 is placed, for example, in... Figure 3 and 5 When placed on a flat and level ground 4 as shown, the toothed nozzle 15 is positioned on the ground 4. Thus, the toothed nozzle 15 is positioned on the flat ground 4 with the toothed nozzle protruding along the height direction 8 in the contact plane 19. Correspondingly, the teeth 14 are spaced apart from the contact plane 19 along the height direction 11. Therefore, the teeth 14 are spaced apart from the flat ground 4 along the height direction 11. Thus, a ramp extending along the height direction 11 is created between the toothed nozzle 15 protruding far outward along the height direction 11 on the corresponding edges 9, 10 and the teeth 14 spaced apart from this toothed nozzle along the height direction 11. This ramp results in a reduction in the entire contact area between the grounding nozzle 1 and the ground 4. This results in a reduction in mechanical resistance and therefore a reduction in the thrust required to move the grounding nozzle 1 along the direction of movement 5. Furthermore, the ramp results in dirt particles, especially coarse dirt, being easily entered into the suction opening during operation and therefore better sucked away when suction flow is present.

[0062] The orientation of edges 9 and 10 with teeth 14 and grooves 15, as in Figure 9As exemplarily shown, this also results in the fibers 20 moving both in the direction of motion 5 and in the lateral direction 8 and in the height direction 11 when the grounding nozzle 1 moves along the direction of motion 5 during suction of the floor 4, such as carpet 21, containing fibers 20. This improves the cleaning effect. Here, in Figure 9 For better overview, teeth 14 and tooth grooves 15 are not considered or shown. This, as illustrated, also additionally causes the fiber 20 to have [spread] along the direction of movement 5 and the height direction 11. Figure 9 The movement shown in the figure causes fiber 20 to also move in the transverse direction 8 (not shown).

[0063] Especially by Figure 2 and 3 As shown in 5 and 6, in the illustrated embodiment, the suction opening 7 is arranged in the suction section 22 of the bottom side 6. The suction section 22 is arranged between the two outer sections 23 of the bottom side 6 along the direction of movement. Here, the outer sections 23 are inclined from the suction section 22, especially from the edges 9 and 10, and are directed away from the ground 4, especially away from the contact plane 19. Therefore, a slope away from the direction of the suction opening 7 is created in the respective outer sections 23.

[0064] Especially by Figure 1 and 4 As can be seen, in the illustrated embodiment, a recess 24 embedded in the bottom side 6 along the height direction 11 is constructed between at least two consecutive grooves 15 along the transverse direction 8. In the illustrated embodiment, such a recess 24 is constructed between each of two consecutive grooves 15 along the transverse direction 8 on the respective edges 9, 10. Thus, the bottom side 6 has a wavy or sawtooth shape extending along the transverse direction 8 by the grooves 15 protruding far along the height direction 11 and the recesses 24 arranged therebetween. The corresponding recess 24 extends parallel to the direction of movement 5 and, in the illustrated example, extends into a corresponding tooth of tooth 14. The corresponding tooth 14 of the corresponding recess 24 is a tooth 14 arranged between the corresponding grooves 15, between which recesses 24 are also arranged. The corresponding tooth 14 is therefore a component of the corresponding recess 24. In the illustrated embodiment, the corresponding recess 24 extends from the corresponding tooth 14 to the end side 25 of the grounding nozzle 1 opposite to the suction opening 7 along the direction of movement 5. The corresponding recess 24 slopes downward in the height direction away from the associated tooth 14 along the direction of movement 5. This is achieved in the illustrated example by the corresponding orientation of the outer segment 23. The corresponding recess 24 here has a funnel-shaped orientation along the transverse direction 8 in the region of the associated tooth 14 by the orientation of the associated edges 9, 10. The corresponding recess 24 thus forms a channel 26 that extends from the associated end side 25 to the associated tooth 14 and thus into the suction opening 7. The recess 24 thus allows for the simplified conveying of dirt particles, especially coarse dirt, into the suction opening 7.

[0065] In particular, the cross-section of the tooth 14 of the grounding nozzle 1 is shown. Figure 2 and 6 It can be seen that the corresponding tooth 14 extends into the suction opening 7 with the tooth tip 17. This causes a vortex that improves the cleaning effect when air is drawn in.

[0066] The corresponding tooth groove, particularly the corresponding tooth groove bottom surface 16, in the illustrated embodiment, opens into a corresponding pocket 27, which opens outward along the height direction 11 and inward along the direction of movement toward the inner volume 12. For example... Figure 9 As illustrated by the arrows showing the suction flow, the corresponding pockets 27 generate vortices that improve cleaning efficiency when air is drawn in. The vortices generated by the pockets 27 extend substantially around a vortex axis 28 parallel to the direction of motion 5.

[0067] The pockets 27 are constructed in an inner wall 29 extending along the height direction 11 and the transverse direction 8, adjacent to the associated edges 9, 10 in the height direction 11, which defines the boundary of the inner volume 12 along the direction of movement 5. Within the inner wall 29, between successive pockets 27 in the transverse direction 8, there are flattened and closed separation sections 30. Associated protruding tooth tips 17 are arranged above the respective separation sections 30 along the height direction 11.

[0068] Such as especially by Figure 1 , 4 As can be seen in section 8, it is preferable that the corresponding teeth 14, especially the corresponding tooth tips 17, are rounded. It is also advantageous that the corresponding tooth grooves 15, especially the corresponding tooth groove bottom surfaces 16, are rounded. This results in a reduction of mechanical resistance, particularly when in contact with the fibers 20, and thus a reduction in the thrust required to move the grounding nozzle 1 along the direction of motion 5. Furthermore, this avoids or at least reduces damage to the fibers 20. Figure 1 The tooth 14 and tooth groove 15 of the embodiment have a ratio Figure 4 The tooth 14 and tooth groove 15 of the embodiment have smaller curvature.

[0069] exist Figure 1 In the embodiment, both the front edge 9 and the rear edge 10 have teeth 14 and grooves 15 of the type described above. Here, in Figure 1 In the embodiment shown, two teeth 14 are arranged opposite each other parallel to the direction of movement 5. Furthermore, two tooth grooves 15 are arranged opposite each other parallel to the direction of movement 5. Correspondingly, in the example shown... Figure 1 Sections marked with II Figure 2 Two teeth 14 can be seen. For comparison, the position of the tooth groove 15 is shown with a dashed line. Furthermore, in the diagram shown... Figure 1 Sections marked with III Figure 3Two toothed grooves 15 with associated pockets 27 can be seen, where the position of tooth 14 is shown in dashed lines for comparison.

[0070] exist Figures 4 to 8 In this embodiment, only the front edge 9 has teeth 14 and grooves 15 of the type described above. Correspondingly, the rear edge 10 has no teeth 14 and grooves 15 and extends straight along the transverse direction 8. Here, the rear edge 10 is located in the contact plane 19. Correspondingly, in this embodiment, when the grounding nozzle 1 is placed on the flat ground 4, the rear edge 10 and grooves 15 are placed on the ground 4.

[0071] Correspondingly, in the example shown Figure 4 The cross section marked with V in the middle Figure 5 In the diagram, the toothed groove 15 with the associated pocket 27 can be seen. (The diagram is shown...) Figure 5 Sections marked with VI Figure 6 Therefore, tooth 14 can be seen. For comparison, the position of tooth groove 15 is shown with a dashed line.

[0072] As by Figure 4 As is known, a thread take-up device 31 can be arranged on the side of at least one of the edges 9 and 10, facing away from the suction opening 7, along the direction of movement 5. The thread take-up device 31 is spaced apart from the suction opening 7 along the direction of movement 5. Figure 4 In one embodiment, such a thread take-up device 31 is arranged on the side of the corresponding edges 9, 10 facing away from the suction opening 7 along the direction of movement 5. The corresponding thread take-up device 31 extends laterally in a strip-like or slightly elongated shape. As particularly shown in the figure... Figure 4 Sections marked VII Figure 7 It can be seen that the thread take-up device 31, which is arranged on the side of the front edge 9 with teeth 14 and grooves 15 facing away from the suction opening 7, is arranged in successive recesses 24 along the transverse direction 8 and thus follows a wavy or sawtooth direction.

[0073] List of reference numerals

[0074] 1 Grounding nozzle

[0075] 2. Vacuum cleaner

[0076] 3. Grounding Unit

[0077] 4. Ground

[0078] 5. Direction of movement

[0079] 6. Bottom side

[0080] 7. Suction opening

[0081] 8. Horizontal

[0082] 9. The front edge

[0083] 10. On the rear edge

[0084] 11. Height Direction

[0085] 12 Internal volume

[0086] 13 tube body

[0087] 14 teeth

[0088] 15 tooth grooves

[0089] 16. Gear bottom surface

[0090] 17 tooth cusps

[0091] 18. Side view

[0092] 19 Contact plane

[0093] 20 fibers

[0094] 21 Carpets

[0095] 22 Suction Section

[0096] 23 Outer Section

[0097] 24 recess

[0098] 25 end side

[0099] 26 channels

[0100] 27 pockets

[0101] 28. Vortex axis

[0102] 29 Inner Wall

[0103] 30 Separation Section

[0104] 31. Thread picker.

Claims

1. A grounding nozzle (1) of a vacuum cleaner (2) for vacuuming the floor (4), having a bottom side (6) facing the floor (4) for vacuuming the floor (4); having a suction opening (7) constructed in the bottom side (6) for sucking up dirt; wherein, The grounding nozzle (1) is designed to move along the ground (4) in the direction of motion (5); wherein the suction opening (7) is bounded in the direction of motion (5) by a front edge (9) and a rear edge (10) opposite to the front edge (9) in the direction of motion (5); wherein at least one of the edges (9, 10) has a tooth (14) pointing towards the suction opening (7) parallel to the direction of motion (5) and a tooth groove (15) pointing away from the suction opening (7), which are transverse to the direction of motion (5) in the direction of motion (8). The first tooth (15) is arranged in a contact plane (19) that protrudes maximally toward the ground (4) along a height direction (11) that is transverse to the direction of movement (5) and transverse to the direction of movement (8), so that the associated edges (9, 10) slope downward toward the tooth (14) along the height direction (11), and so that at least one tooth (15) is placed on the ground (4) when the grounding nozzle (1) is placed on the flat ground (4) and the tooth (14) is spaced apart from the ground.

2. The grounding nozzle according to claim 1, characterized in that, At least two of the grooves (15) are arranged in the contact plane (19); and a related recess (24) is constructed between at least two adjacent grooves (15) along the transverse (8) and embedded in the bottom side (6) along the height direction (11).

3. The grounding nozzle according to claim 2, characterized in that, The grooves (15) and recesses (24) alternately and continuously in the transverse direction (8).

4. The grounding nozzle according to claim 2 or 3, characterized in that, At least one of the at least one recess (24) opens into the corresponding tooth of the tooth (14), the tooth being arranged between the tooth grooves (15), and the recess (24) being arranged between the tooth grooves.

5. The grounding nozzle according to claim 2 or 3, characterized in that, At least one of the at least one recesses (24) is parallel to the direction of movement (5).

6. The grounding nozzle according to claim 4, characterized in that, At least one of the at least one recess (24) is parallel to the direction of movement (5) and slopes downward in the height direction (11) away from the associated tooth (14).

7. The grounding nozzle according to any one of claims 1 to 3, characterized in that, The bottom side (6) has at least one outer section (23) spaced apart from the suction opening (7) along the direction of movement (5), the outer section extending obliquely away from the ground (4) parallel to the direction of movement (5).

8. The grounding nozzle according to any one of claims 1 to 3, characterized in that, At least one of the toothed grooves (15) extends into a corresponding pocket (27) on the side facing away from the ground (4) along the height direction (11), the pocket opening outward and closing inward along the height direction (11).

9. The grounding nozzle according to claim 2 or 3, characterized in that, At least one of the recesses (24) extends from the associated tooth (14) to the end side (25) of the grounding nozzle (1) opposite to the suction opening (7) in parallel with the direction of movement (5).

10. The grounding nozzle according to any one of claims 1 to 3, characterized in that, A thread take-up device (31) is arranged on the side of at least one of the edges (9, 10) facing away from the suction opening (7).

11. The grounding nozzle according to claim 10, characterized in that, The thread picker (31) is arranged in at least two consecutive recesses (24) parallel to the transverse direction (8).

12. The grounding nozzle according to any one of claims 1 to 3, characterized in that, The front edge (9) is an edge with teeth (14) and grooves (15); and the rear edge (10) extends straight parallel to the transverse (8) and is in the contact plane (19), so that when the grounding nozzle (1) is placed on the flat ground (4), the rear edge (10) and at least one groove (15) are placed on the ground (4).

13. The grounding nozzle according to any one of claims 1 to 3, characterized in that, At least one tooth groove (15) has its bottom surface (16) arranged in the contact plane (19) and the tooth groove (15) is also spaced apart from the contact plane (19).

14. The grounding nozzle according to any one of claims 1 to 3, characterized in that, At least one of the teeth (14) has a tooth tip (17) that is sharply or curved toward the suction opening (7).

15. The grounding nozzle according to any one of claims 1 to 3, characterized in that, At least one of the teeth (14) has a tooth tip (17) protruding into the suction opening (7).

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