DE102018116395A1 - Cleaning device with a suction nozzle and a mechanical cleaning element - Google Patents

Abstract

The invention relates to a cleaning device (1) having a housing (2), a suction nozzle (3) and a cleaning element (5) acting mechanically on a surface (4) to be cleaned during a cleaning operation of the cleaning device (1), the suction nozzle (3 ) relative to the cleaning element (5) from a first position to a second position, and vice versa, is displaceable, wherein the suction nozzle (3) relative to a vertical in a conventional operating position projection of the cleaning device (1) on the surface to be cleaned (4 ) protrudes beyond an outline of the housing (2) and / or the cleaning element (5) in the first position and is encompassed by the outline in the second position. In order to be able to clean directly by means of the cleaning element (5) to an obstacle (10), it is proposed that the cleaning device (1), a motor-driven swing plate (14) for non-rotatable mounting of the cleaning element (5), in particular for releasably holding a the cleaning element (5) receiving carrier plate, comprising.

Description

Field of engineering

The invention relates to a cleaning device comprising a housing, a suction nozzle and a cleaning element acting mechanically on a surface to be cleaned during a cleaning operation, wherein the suction nozzle is displaceable relative to the cleaning element from a first position to a second position, and vice versa the suction nozzle relative to a projection of the cleaning device perpendicular to a normal operating position onto the surface to be cleaned in the first position protrudes beyond an outline of the housing and / or the cleaning element and in the second position is encompassed by the outline.

State of the art

Cleaning devices of the aforementioned type are known in the prior art in a variety of different designs. The cleaning devices may, for example, be vacuum cleaners or wet cleaning devices with a suction nozzle. The cleaning devices may be designed as independent cleaning devices or as attachments that are connected to a base unit of a cleaning device. The cleaning devices can moreover be either hand-operated cleaning devices by a user or self-propelled cleaning devices, for example in the form of autonomous cleaning robots.

The publication US 2008/0 141 485 A1 discloses, for example, a cleaning robot with a cleaning brush arranged on the underside and a displaceable suction arm, which can be displaced beyond an outline of the housing of the cleaning robot in order to be able to better clean room corners.

Summary of the invention

Based on the aforementioned prior art, it is an object of the invention to develop a cleaning device so that it provides added value for a user and in particular can clean optimally against walls and / or obstacles.

To achieve this object, it is proposed that the cleaning device has a motor-driven oscillating plate for non-rotatable mounting of the cleaning element, in particular for the releasable mounting of a carrier element receiving the cleaning element.

According to the invention, the cleaning device has a motor-driven vibration plate for non-rotatable mounting of the cleaning element. The oscillating plate can be designed, in particular, for the releasable mounting of a carrier plate receiving the cleaning element. According to this embodiment, the cleaning device has a swinging driven vibration plate on which either directly the cleaning element or particularly preferably a cleaning element receiving support plate can be arranged detachably. The cleaning element is vibrated by means of the vibrating plate. If the cleaning element is mounted on a support plate, which in turn is arranged on the vibrating plate, the cleaning element carries out the oscillating movement of the vibrating plate. The vibrating plate can be swung circular, for example, by an electric motor eccentric drive. In this case, it is particularly recommended that the suction nozzle is at least so far displaced relative to the cleaning element, that the suction - is displaceable - in relation to a direction of movement - behind an advancing in the direction of travel trajectory portion of the oscillating moving cleaning element. This ensures that the cleaning element can be cleaned without obstruction by the suction nozzle immediately before an obstacle, such as a wall, if the arrangement of the cleaning element relative to the housing allows.

The cleaning device is optimized so that even an area before floor-wall transitions, in room corners and / or obstacles, which could not be achieved with the cleaning element usually can be optimally cleaned. By the displacement of the suction nozzle from the first to the second position, the distance between the cleaning element and the respective obstacle, the wall or other objects rising from the surface to be cleaned is reduced, so that the cleaning device as a whole is approaching closer and therefore also there cleaning can perform by means of the cleaning element. The suction nozzle can be held on the cleaning device such that it is displaced from the first to the second position upon contact with or detection of an object rising from the surface to be cleaned. For example, it can be provided that a distance measuring device of the cleaning device detects a distance to an object and, as a function of a defined reference distance between the cleaning device and the object, a displacement of the suction nozzle is initiated. Furthermore, the displacement of the suction nozzle, for example, by the signal of a contact sensor, which is arranged on the housing of the cleaning device or on the suction nozzle, caused. Furthermore, it is also possible that the suction nozzle is displaced from the first to the second position due to the contact with the object. If the cleaning element is arranged below the housing with respect to an orientation of the cleaning device during a usual operating position and preferably protrudes to an edge region of the housing, it is possible by a displacement of the suction nozzle located between the object and the housing, the cleaning element directly to the Bring object so that the surface located in front of the object can be completely cleaned by contact of the cleaning element to the object. The cleaning element of the cleaning device may for example be a cleaning cloth, which is arranged on a flat carrier plate and is guided over the surface to be cleaned. Furthermore, the cleaning element can also be a brush with bristle elements arranged on a flat basic body or a cylindrical bristle roller which rotates about a substantially horizontal axis or vertical axis. The cleaning elements can be designed for a dry cleaning and / or a wet cleaning of the surface to be cleaned.

In particular, it is proposed that the first position of the suction nozzle is a suction position approximated to the surface to be cleaned, and that the second position of the suction nozzle is a retreat position remote from the surface to be cleaned compared to the first position. In the first position, the suction nozzle is approximated to the surface to be cleaned, in particular so that a suction mouth of the suction nozzle acts on the surface to be cleaned with negative pressure. In this case, the housing of the suction nozzle can either be placed directly on the surface to be cleaned or in particular be spaced by means of sealing elements, such as sealing lips or bristle strips of the surface to be cleaned. In the second position, the suction nozzle is removed from the surface to be cleaned, in particular lifted, and so moved back into or under the housing or behind an outwardly facing edge region of the cleaning element, that the suction nozzle does not have the housing of the cleaning device and / or the cleaning element protrudes. In the second position, the suction nozzle may, for example, be pivoted into the housing of the cleaning device, or be displaced over the housing relative to the orientation of the cleaning device during the usual operating position, or be displaced behind the housing relative to a current direction of travel of the cleaning device. In particular, the suction nozzle may be displaced in the retracted position so that it is not visible to a user from outside and / or is incorporated into the housing in a form-corresponding manner, for example in a recess of the housing which corresponds to the shape of the suction nozzle and which is designed to receive the suction nozzle is.

Furthermore, it is proposed that the suction nozzle in the first position is arranged in front of the cleaning element in relation to a direction of travel of the cleaning device which is usual during a cleaning operation. If the cleaning device is a user-guided cleaning device, it is usually moved for cleaning a surface in successive back and forth movements perpendicular to a longitudinal extent of a suction mouth of the suction nozzle, the user pursuing parallel trajectories over the surface to be cleaned , In a self-propelled cleaning device, the cleaning device usually moves in accordance with a rolling direction on the cleaning device arranged drive wheels. The unwinding direction is usually oriented perpendicular to a longitudinal extent of a suction mouth of the suction nozzle. In the direction of travel, the suction nozzle leads the cleaning element in the first position ahead, so that first a suction cleaning on the surface to be cleaned can be made before then a mechanical processing of the surface is in befindlichem in the second position cleaning element. This is advantageous because dirt located on the surface, in particular, for example, small stones or the like, can otherwise be pressed onto the surface by the cleaning element which acts mechanically on the surface and causes scratches or the like there. The suction nozzle is thus arranged on the cleaning device such that it first reaches a partial region of the surface to be cleaned before the mechanically acting cleaning element then reaches this partial region.

Furthermore, it is proposed that the suction nozzle is arranged by means of at least one spring element on the cleaning device. According to this embodiment, the suction nozzle is held by means of one or more spring elements on the cleaning device. The spring element may be, for example, a coil spring, a leaf spring or the like. The spring element supports the displacement of the suction nozzle relative to the housing or the cleaning element and determines a preferred position of the suction nozzle by the direction in which a restoring force of the spring element acts. The spring element or the spring elements may be associated with a guide which directs the displacement movement of the suction nozzle in a certain direction, so that the suction nozzle can be moved from a defined first position to a defined second position.

It is proposed that the suction nozzle following a restoring force of the spring element in the first position is displaceable, and that the suction nozzle is displaceable by overcoming the restoring force in the second position. If the first position is a suction position of the suction nozzle which approximates the surface to be cleaned, the suction nozzle is brought in a preferred position to the surface to be cleaned or placed on the surface to be cleaned. In order to achieve the second position, ie preferably the position of the suction nozzle remote from the surface to be cleaned or raised, the restoring force of the spring element must be overcome. This can be done, for example, that the cleaning device continues to drive on an obstacle on the obstacle to the obstacle to the suction nozzle and thus biases the spring element against its restoring force. As soon as the force opposing the restoring force is removed, the spring element relaxes again in the direction of the first position of the suction nozzle, so that the preferred position is restored.

In particular, it is proposed that the suction nozzle is arranged by means of a pivoting mechanism on the cleaning device. The pivoting mechanism may have a pivotable about a pivot axis pivot arm which carries the suction nozzle. The pivoting mechanism is designed to displace the suction nozzle from the first to the second position, and vice versa. The lever mechanism may be associated with a servomotor, which is suitable to shift the pivoting mechanism between different positions of the suction nozzle relative to the housing or the cleaning element of the cleaning device. On the other hand, however, the pivoting mechanism can also be manually operated by a user of the cleaning device or by the fact that the cleaning device is moved with the suction nozzle against an object, which in turn actuates the pivoting mechanism.

In particular, it is proposed that the suction nozzle is displaceable in contact with an obstacle from the first position to the second position, in particular by a driving force of an electromotive drive of the cleaning device in a movement of the cleaning device in the direction of the obstacle under contact of the suction nozzle with the obstacle. The suction nozzle is thus held on the cleaning device so that it can be displaced from the first to the second position upon contact with an obstacle. By a movement of the cleaning device against the obstacle, while maintaining the contact between the suction nozzle and the obstacle, for example, the restoring force of a spring element is overcome by the driving force of the cleaning device, so that the second position can be achieved. This mode of operation for displacing the suction nozzle can be used both in cleaning devices that are manually guided by a user and in cleaning devices that move on their own. Furthermore, this design is also suitable for the displacement of the suction nozzle via a lever mechanism. A pivotable about a pivot axis lever can be pivoted by contact with the object, possibly also against the restoring force of a spring element. The lever mechanism allows the suction nozzle to pivot into the second position. For this purpose, a suction nozzle supporting the lever is supported against an object and pivoted on movement of the cleaning device to the object to the pivot axis. The suction nozzle deviates from a contact surface, for example on an obstacle or a wall, when the cleaning device is moved towards the obstacle or the wall.

In particular, it is proposed that the suction nozzle has at least one roller and / or a sliding element for abutment and / or for rolling on an obstacle. The obstacle may be an object rising from the surface to be cleaned, for example a piece of furniture or a wall. By means of the roller, the suction nozzle can roll on the obstacle without damaging the obstacle. By means of the sliding element, the suction nozzle can slide along the obstacle with low frictional resistance. The resistance force occurring when the suction nozzle is displaced relative to the obstacle is significantly reduced. The at least one roller or the at least one sliding element can guide the movement of the suction nozzle on the obstacle, so that the suction nozzle pursues a defined movement path from the first to the second position, or vice versa. The embodiment with arranged on the suction nozzle roller or arranged sliding element is suitable both in a cleaning device with a pivoting mechanism, as well as in a cleaning device with the suction nozzle on the cleaning device holding spring elements.

It can be provided that the cleaning device is a wet cleaning device or an attachment for a wet cleaning device. In this case, the cleaning element is preferably a wet cleaning element, in particular a wipe, to which liquid can be applied. The wipe may be disposed on a cleaning roller which rotates about a horizontal or vertical axis of rotation or on a support plate which rests substantially parallel on the surface to be cleaned during the cleaning operation of the cleaning device and makes circular movements.]

list of figures

• 1 eine Reinigungseinrichtung gemäß einer ersten Ausführungsform,
• 2 einen Teilbereich der Reinigungseinrichtung mit einer ersten Stellung einer Saugdüse,
• 3 den Teilbereich gemäß 2 mit einer zweiten Stellung der Saugdüse,
• 4 eine weitere Ausführungsform der Reinigungseinrichtung mit einer durch eine Schwenkmechanik verlagerten Saugdüse in einer ersten Stellung,
• 5 den Teilbereich der Reinigungseinrichtung gemäß 4 in einer zweiten Stellung der Saugdüse,
• 6 eine Reinigungseinrichtung gemäß einer weiteren Ausführungsform,
• 7 die Reinigungseinrichtung gemäß 6 mit einer Saugdüse in einer ersten Stellung,
• 8 die Reinigungseinrichtung gemäß 6 beziehungsweise 7 mit der Saugdüse in einer zweiten Stellung,
• 9 eine weitere Ausführungsform einer Reinigungseinrichtung mit einer an einer Schwenkmechanik angeordneten Saugdüse in einer ersten Stellung,
• 10 die Reinigungseinrichtung gemäß 9 mit der Saugdüse in einer zweiten Stellung.

In the following the invention will be explained in more detail by means of exemplary embodiments. Show it:

• 1 a cleaning device according to a first embodiment,
• 2 a portion of the cleaning device with a first position of a suction nozzle,
• 3 the subarea according to 2 with a second position of the suction nozzle,
• 4 a further embodiment of the cleaning device with a displaced by a pivoting mechanism suction nozzle in a first position,
• 5 the subregion of the cleaning device according to 4 in a second position of the suction nozzle,
• 6 a cleaning device according to another embodiment,
• 7 the cleaning device according to 6 with a suction nozzle in a first position,
• 8th the cleaning device according to 6 respectively 7 with the suction nozzle in a second position,
• 9 a further embodiment of a cleaning device with a arranged on a pivoting mechanism suction nozzle in a first position,
• 10 the cleaning device according to 9 with the suction nozzle in a second position.

Description of the embodiments

1 shows a cleaning device 1 , which here as a hand-held wet cleaning device with a base unit 13 and one on the base unit 13 separable recorded attachment 12 is trained. The attachment 12 here also provides a cleaning device in isolation 1 according to the invention. However, in the following, the entire system will be a header 12 and basic device 13 as a cleaning device 1 designated. The basic device 13 has a handle 16 on, which is formed here, for example telescopic, so that a user of the cleaning device 1 the length of the stem 16 can adapt to his height. On the stalk 16 is also a handle 17 arranged at which the user of the cleaning device 1 during a conventional cleaning operation, ie over a surface to be cleaned 4 push, can. During the cleaning operation, the user guides the cleaning device 1 usually in opposite directions of travel 7 over the surface to be cleaned 4 , He pushes the cleaning device 1 alternately away from themselves or pulls them to himself. At the handle 17 is a switch 18 which, for example, the switching on and off of a motor of the cleaning device 1 serves. On a housing 2 of the attachment 12 is a suction nozzle 3 with the help of spring elements 8th held. The spring elements 8th are here, for example, designed as coil springs. The spring elements 8th may be assigned a guide means, not shown, which the spring travel of the spring elements 8th so deflects that a cocked or relaxed position of the spring element 8th is reached along a defined trajectory. Between the suction nozzle 3 and the housing 2 the cleaning device 1 is further a suction channel 15 arranged, which has a suction mouth of the suction nozzle 3 with a motor-blower unit of the cleaning device 1 connects so that the suction mouth of the suction nozzle 3 can be applied with negative pressure. The motor-blower unit is here preferably in the base unit 13 the cleaning device 1 arranged. The illustration shows the suction nozzle 3 in a preferred position, which a relaxed position of the spring elements 8th equivalent. In this position, the suction mouth of the suction nozzle 3 to the surface to be cleaned 4 introduced so that on the surface 4 located suction material in the cleaning device 1 can be sucked. At the bottom of the case 2 there is a cleaning element 5 , which mechanically on the surface to be cleaned 4 acts. The cleaning element 5 Here is a wipe, which is attached to a swing plate 14 the cleaning device 1 is attached. The oscillating plate can be driven by means of an eccentric drive. During cleaning, the vibrating plate completes 14 For example, a recurring oscillatory motion with an oscillation frequency of, for example, 1,000 U / m up to 2,000 U / m per minute. This swinging motion of the vibrating plate 14 relative to the housing 2 the cleaning device 1 superimposed during a cleaning operation of the cleaning device 1 with a shift of the cleaning device 1 over the surface to be cleaned 4 by a user. Both movements, ie both the manual displacement movement in a direction of movement 7 , as well as the swinging motion of the swing plate 14 , take place in the same plane, namely parallel to the surface 4 , The cleaning element 5 is for example an elastic trained cleaning cloth, in particular a microfiber cloth. This can with the help of fasteners, such as Velcro, on the swing plate 14 be arranged. Alternatively, the cleaning element 5 be carried by a support plate, which in turn rotatably with the swing plate 14 is connectable. In the figure is the vibrating plate 14 relative to the housing 2 flush with a border area 6 of the housing 2 so that the swing plate 14 not under the case 2 poking out. It is here, for example, provided that the vibrating plate 14 not over this edge area 6 under the housing 2 can swing out, leaving the suction nozzle 3 in the position shown an outermost, outward of the casing 2 projecting portion of the cleaning device 1 forms. Starting from this suction position, the suction nozzle 3 against the restoring force of the spring elements 8th be moved to a retracted position, in which the suction nozzle 3 in a designated recess 22 of the housing 2 is moved in and therefore no longer on the outline of the housing 2 and therefore not on an outline of the cleaning element 5 protrudes.

The 2 and 3 show a longitudinal section of the attachment 2 , where in 2 the displaced to the outside suction position of the suction nozzle 3 is shown, and wherein in 3 in the case 2 moved into the retracted position of the suction nozzle 3 is shown. In 2 is the cleaning device 1 in front of an obstacle 10 which is for example a wall of a room here. During the illustrated cleaning operation, the user guides the cleaning device 1 first head on the obstacle 10 to, by means of the suction nozzle 3 a suction cleaning of the area 4 perform. Once the suction nozzle 3 in contact with the obstacle 10 occurs, acts by the user on the cleaning device 1 applied pushing force of the restoring force of the suction nozzle 3 holding spring elements 8th opposite. This will make the suction nozzle 3 against the restoring force of the spring elements 8th in a preferably guided movement of the in 2 shown suction position in the in 3 shifted shown withdrawal position. So that can be done under the case 2 arranged cleaning element 5 the area 4 to the obstacle 10 clean up what is in the in 2 illustrated suction position of the suction nozzle 3 was not possible. Once the user has the cleaning device 1 again from the obstacle 10 removed, the spring elements can 8th relax again, leaving the suction nozzle 3 the direction of the restoring force of the spring elements 8th again in the in 2 shown suction position is shifted. In this position, in addition to the cleaning by means of the cleaning element 5 again a suction cleaning on the suction nozzle 3 possible.

The 4 and 5 show a second embodiment of a user-guided by a cleaning device 1 , In this embodiment, the suction nozzle 3 about a joint 19 having pivoting mechanism 9 on the housing 2 the cleaning device 1 arranged. The suction nozzle 3 has a role according to the illustrated embodiment 11 on, by means of which the suction nozzle 3 at the attachment to the obstacle 10 can roll. This will cause damage to the obstacle on the one hand 10 avoided and on the other hand a frictional force between the suction nozzle 3 and the obstacle 10 eliminated or at least significantly reduced. The transition from the in 4 illustrated suction position of the suction nozzle 3 in the in 5 illustrated withdrawal position of the suction nozzle 3 takes place as before with respect to the 1 to 3 explained in more detail by the on the cleaning device 1 applied pushing force of the user. Alternative to the role 11 could be the suction nozzle 3 also have a sliding element.

Although not shown in the figures, it is of course also possible that a contact sensor of the cleaning device 1 a displacement of the suction nozzle 3 between the two illustrated positions as a function of a detected distance to the obstacle 10 causes. In principle, furthermore, a manual displacement of the suction nozzle 3 possible, even if this requires manual intervention of the user and therefore less comfortable than the other embodiments.

The 6 to 10 each show a cleaning device 1 , which is designed as a self-propelled locomotive cleaning device. This is a combined suction-wiping cleaning device 1 with a suction nozzle 3 and a cleaning element 5 namely a cleaning cloth for wet wiping, which is attached to a vibrating plate 14 is held. The cleaning device 1 has self-propelled locomotion via motor-driven wheels 20 , Furthermore, the cleaning device has 1 via a navigation and self-locating device, by means of which the cleaning device 1 Orient within an environment and can act in such a way that an unwanted collision with obstacles 10 is avoided. Furthermore, the cleaning device has 1 via a distance measuring device 21 which distances to obstacles 10 measures. On the basis of the detected distance values, a computing device can display an environment map for the cleaning device 1 which the navigation and self-locator accesses to orient and move within the environment.

The displacement of the suction nozzle 3 from the suction position in the retracted position is also in the in the 6 to 10 shown cleaning device 1 as before with respect to the user-guided cleaning device 1 described.

The 6 to 8th relate to an embodiment in which the suction nozzle 3 with the help of spring elements 8th on the housing 2 the cleaning device 1 is held.

The 9 and 10 show an embodiment in which the suction nozzle 3 by means of a swivel mechanism 9 pivotable on the housing 2 the cleaning device 1 is held. The swing mechanism 9 can additionally a spring element not shown in detail 8th be assigned. The swivel mechanism 9 has a joint 19 around which the suction nozzle 3 is pivotable from the suction position to the retracted position. Also according to this embodiment is at the suction nozzle 3 turn outward turned a role 11 arranged, which in contact with an obstacle 10 at the obstacle 10 can roll to low resistance a displacement of the suction nozzle 3 along a track on the obstacle 10 to reach. The displacement of the suction nozzle 3 is continued until the suction nozzle 3 , as in 10 shown in a recess 22 of the housing 2 the cleaning device 1 is pivoted. In this position, the cleaning element 5 , which is flush with the edge area 6 of the housing 2 is shifted, a cleaning also immediately before or at the obstacle 10 perform without the suction nozzle 3 the cleaning device 1 from the obstacle 10 spaced.

LIST OF REFERENCE NUMBERS

1

cleaning device

2

casing

3

suction nozzle

4

area

5

cleaning element

6

border area

7

Direction of travel

8th

spring element

9

swivel mechanism

10

obstacle

11

role

12

header

13

basic unit

14

vibration plate

15

suction

16

stalk

17

Handle

18

switch

19

joint

20

wheel

21

Distance measuring device

22

recess

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• US 2008/0141485 A1 [0003]

Claims (9)

Cleaning device (1) having a housing (2), a suction nozzle (3) and a cleaning element (5) acting mechanically on a surface (4) to be cleaned during a cleaning operation of the cleaning device (1), wherein the suction nozzle (3) is relative to the Cleaning element (5) from a first position to a second position, and vice versa, is displaceable, wherein the suction nozzle (3) relative to a perpendicular in a conventional operating position projection of the cleaning device (1) on the surface to be cleaned (4) in the first Position over an outline of the housing (2) and / or the cleaning element (5) protrudes and in the second position is encompassed by the outline, characterized by a motor-driven swing plate (14) for rotationally fixed support of the cleaning element (5), in particular for releasable Holder of a cleaning element (5) receiving carrier plate. Cleaning device (1) after Claim 1 , characterized in that the first position of the suction nozzle (3) is a suction position approximated to the surface (4) to be cleaned and that the second position of the suction nozzle (3) remote from the surface to be cleaned (4) compared to the first position Retreat position is. Cleaning device (1) after Claim 1 or 2 , characterized in that the suction nozzle (3) in the first position with respect to a usual during a cleaning operation Fortbewegungsrichtung (7) of the cleaning device (1) in front of the cleaning element (5) is arranged. Cleaning device (1) according to one of the preceding claims, characterized in that the suction nozzle (3) by means of at least one spring element (8) on the cleaning device (1) is arranged. Cleaning device (1) after Claim 4 , characterized in that the suction nozzle (3) following a restoring force of the spring element (8) is displaceable in the first position, and that the suction nozzle (3) is displaceable by overcoming the restoring force in the second position. Cleaning device (1) according to one of the preceding claims, characterized in that the suction nozzle (3) by means of a pivoting mechanism (9) on the cleaning device (1) is arranged. Cleaning device (1) according to one of the preceding claims, characterized in that the suction nozzle (3) is displaceable in contact with an obstacle (10) from the first position to the second position, in particular by a driving force of an electromotive drive of the cleaning device (1 ) in a movement of the cleaning device (1) in the direction of the obstacle (10) under contact of the suction nozzle (3) with the obstacle. Cleaning device (1) according to one of the preceding claims, characterized in that the suction nozzle (3) has at least one roller (11) and / or a sliding element for abutment and / or rolling on an obstacle (10). Cleaning device (1) according to one of the preceding claims, characterized in that the cleaning device (1) is a wet cleaning device or an attachment (12) for a wet cleaning device.

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