EP3367866B2 - Floor nozzle for a vacuum cleaner device - Google Patents

Description

field of technology

The invention relates to a floor nozzle for a vacuum cleaning device, which has a housing and a suction channel arranged in the housing for connection to a fan of a vacuum cleaning device, the suction channel being displaceable by means of an actuator from a hard floor position to a carpeted floor position or vice versa.

State of the art

Floor nozzles of the aforementioned type are known. These can either be arranged on a basic device in the manner of an attachment or be an integral part of a vacuum cleaning device. The suction cleaning device can be a cleaning device designed either only for suction or for both suction and wiping. This is either hand-held by a user or can be moved automatically, for example as a cleaning robot.

In order to ensure an equally optimal cleaning result on different types of floor coverings, it is known to reversibly adapt the floor nozzles to the respective type of floor. For example, setting the floor nozzle for a hard floor differs from a setting for a carpeted floor or carpet. The settings differ, for example, by a different distance between a suction mouth connected to the suction channel and the surface to be cleaned. In the hard floor position, the floor nozzle is usually positioned on the surface to be cleaned by means of sealing elements, for example bristle elements and/or sealing lips, creating or increasing a distance between the suction mouth and the surface to be cleaned. This prevents scratches in the hard floor. In the carpeted position, the suction mouth is usually brought up to the surface to be cleaned, so that the distance between the suction mouth and the carpeted floor or carpet is reduced.

The pamphlet WO 2011/007160 A1 discloses, for example, a floor nozzle in which, depending on the type of floor covering, a bristle unit arranged on the floor nozzle is displaced, whereby at the same time the housing of the floor nozzle is lowered onto or lifted from the surface to be cleaned. The bristle unit is connected to an air bellows which, in the case of a hard floor, causes the bristle unit to move out beyond the outer circumference of the housing and, in the case of a carpeted floor, causes the bristle unit to move into the housing. A valve is assigned to the air bellows, which valve opens or closes depending on the type of floor covering and thus triggers an expansion or contraction of the air bellows. Another example of a floor nozzle is from US4706327 known.

Summary of the Invention

Proceeding from the aforementioned prior art, it is the object of the invention to create a floor nozzle which has an alternative mechanism for moving the floor nozzle from a hard floor position to a carpeted floor position and vice versa. In particular, the force required to move the floor nozzle should be reduced.

To solve the above problem, a floor nozzle according to claim 1 is first proposed.

The floor nozzle is adapted to the type of floor covering by moving the suction channel relative to the housing. It is not necessary to move the housing as such in order to bring the suction channel and thus in particular the plane of the suction mouth, in which the suction channel ends at the bottom, closer to the surface to be cleaned. As a result, the shift from the hard floor position to the carpeted floor position, and vice versa, may take place with less effort.

The housing preferably encloses the suction channel on the top and/or on the side. The suction mouth can protrude downwards beyond the housing, possibly depending on a displacement position of the suction channel. A displacement of the suction channel preferably also takes place through the housing and is not visible to a user of the vacuum cleaning device.

According to the invention, the suction channel is connected to the actuator by means of a gear in such a way that the suction channel can be displaced, in particular pivoted, relative to the housing as a result of actuation of the actuator. For this purpose, the suction channel is mounted on the housing such that it can be displaced, for example about a pivot axis which corresponds to a rotation axis of a traverse of the floor nozzle. The suction channel is advantageously moved into the housing in a hard floor position, so that the suction mouth does not protrude beyond the outer contour of the housing or at least not beyond the level of a bristle unit and, for example, cannot scratch sensitive hard floor coverings. In the carpeted position, the suction mouth is advantageous at least with one End area pivoted out of the housing or possibly above the level of a bristle unit, so that it rests on the carpet. The displacement of the suction channel is effected by means of the actuator, the suction channel being connected to the housing in such a way that a displacement or movement of the actuator also results in a displacement of the suction channel, in particular a pivoting of the suction channel about the pivot axis. It is advisable to dimension the distance between the pivot axis of the suction channel on the housing and the suction mouth, which comes into contact with the surface to be cleaned, as large as possible, so that the force to be applied to transfer the floor nozzle from a carpeted floor position to a hard floor position is as low as possible. In contrast to a bristle unit or floor nozzle housing to be displaced essentially perpendicularly to the surface to be cleaned, less force is therefore required. In addition, the type of transmission can also cause a change in the required force. This will be explained in more detail later.

According to claim 1, the gear mechanism of the floor nozzle has a guide link which is displaceably arranged on the housing and into which an engagement element of the suction channel engages. By using a guide link between the actuator, for example an air bellows, and the suction channel, the force required for pivoting, in particular for pivoting from a carpeted floor position to a hard floor position, of the suction channel can be significantly reduced. As a result, the actuator required for pivoting can be smaller, for example an air bellows with a smaller diameter can be used, a servomotor with less power or the like can be used. This may in turn lead to a smaller design of the actuator, which contributes overall to the low weight and small dimensions of the floor nozzle. The suction channel and the guide link are connected by means of an engagement element of the suction channel, wherein the engagement element engages in the guide link and is also displaced when the guide link is displaced relative to the housing. For raising the suction channel from the carpeted floor position to the hard floor position, the guide slot has a guide surface with a corresponding incline, along which the engagement element of the suction channel can slide. The lifting of the suction channel from the surface to be cleaned is brought about by the restoring movement of the actuator, e.g. combined with the restoring force of a spring assigned to the actuator, in conjunction with the incline of the link, the incline continuously moving the engagement element away from the surface to be cleaned moves and thus causes a lifting of the suction channel. Since the suction channel is also pivotably mounted on the housing of the floor nozzle, the force to be overcome is reduced due to the leverage effect.

Advantageously, the guide link can be displaced essentially parallel to a surface to be cleaned, based on an orientation of the floor nozzle during normal suction operation. The guide link can thus be displaced essentially horizontally, so that the force to be used to move the guide link is as small as possible. The actuator thus advantageously pulls the guide link horizontally towards itself or pushes it away from itself in the horizontal direction during expansion.

It is proposed that the guide link based on a direction of displacement towards the actuator provides a sloping guide surface for the engagement element, so that the engagement element relative to a position of the floor nozzle during normal suction operation in the direction of cleaning surface is displaceable. Advantageously, the movement of the engagement element relative to the housing of the floor nozzle is guided in such a way that the engagement element is displaced essentially perpendicularly to the surface to be cleaned, ie also essentially perpendicularly to the direction of displacement of the guide link. The guide surface can be provided, for example, by a slot formed in the guide link, in which the engagement element engages. The engagement element is thus connected to the guide slot on the one hand and to a guide of the housing on the other hand. When the guide link is displaced, the engagement element runs along the rising or falling guide surface, resulting in a height displacement of the engagement element within the housing guide. At the same time, this causes the desired vertical displacement of the suction channel.

The object on which the invention is based is also achieved by a floor nozzle according to claim 4 . The transmission has two transmission elements pivotally connected on a common pivot axis that can be displaced by means of the actuator, with a first transmission element being connected on the one hand with the pivot axis and on the other hand with the suction channel, and with a second transmission element being connected on the one hand with the pivot axis and on the other hand with the housing . This configuration corresponds to the structure of a linkage. As before, the suction channel is pivotally connected to the housing and the actuator by means of the gearing. The two gear elements can be pivoted about a common pivot axis, which pivot axis can be displaced at the same time by actuating the actuator. During this shift, the first gear element and the second gear element are pivoted relative to one another, since the second gear element is at its end region opposite the pivot axis is connected to the housing of the floor nozzle and the first gear element is connected to the suction channel at its end region remote from the pivot axis. Advantageously, when the actuator is shifted from the hard floor position to the carpeted floor position, the pivot axis is shifted in the direction of the actuator, with the two gear elements being pivoted apart like scissors and the first gear element, which is connected to the suction channel, moves the suction channel in the direction of the cleaning surface swivels. On the other hand, when the actuator is actuated from the carpeted floor position in the direction of the hard floor position, the pivot axis of the gear element is displaced away from the actuator, so that the two gear elements are pivoted towards one another about the pivot axis and the end region of the suction channel is displaced in towards the housing of the floor nozzle. According to this embodiment, the actuator can also be an air bellows, a servomotor, a lifting magnet or the like.

The object on which the invention is based is also achieved by a floor nozzle according to claim 5 . The gear is a rack and pinion gear or toothed wheel gear connected on the one hand to the suction channel and on the other hand to the actuator. The actuator can be connected to a toothed rack, for example, which is connected to the suction channel via a toothed wheel or a plurality of toothed wheels and a further toothed rack. When the actuator is actuated, there is a linear displacement of the rack and a rotation of the gear (the gears), which in turn pivots the suction channel by means of a rack either in the direction of the surface to be cleaned or moves away from it. Due to the different number of teeth on the rack or racks and of the gearwheel or gearwheels, a transmission ratio can be set, which reduces the force to be applied by the actuator to move the suction channel. According to this embodiment, the actuator can again be an air bellows, a lifting magnet, a servomotor or the like.

Furthermore, it is proposed that a spring is assigned to the actuator, the restoring force of which is directed in the direction of a preferred position of the suction channel, in particular in the direction of a hard floor position of the suction channel shifted into the housing. Even when the actuator is not actuated, the suction channel is always in a predefined position, namely the preferred position. This preferred position can in principle be either the hard floor position or the carpeted floor position of the suction channel, although it is advantageous for the preferred position to be the hard floor position in which the suction channel is moved into the housing and the suction mouth therefore does not point beyond the outer contour of the housing and does so possibly damage a sensitive floor covering. In the hard floor position, the floor nozzle advantageously stands on a bristle element and/or a sealing lip, so that a sufficient distance is created between the floor covering and the housing of the floor nozzle. The restoring force of the spring is adapted to the structural conditions of the pivoting mechanism and the weight of the suction channel, so that if the actuator is not actuated, the suction channel can advantageously be lifted from the floor covering and moved into the housing solely by the restoring force of the spring.

It is proposed that the actuator has an air bellows. This air bellows can be expanded by applying air or by evacuation are contracted, with the related suction channel being displaced, i.e. pivoted. The linear movement of the air bellows is deflected into a pivoting movement of the suction channel. As an alternative to the air bellows, the actuator can also have a servomotor, a lifting magnet or the like. The spring described above is advantageously assigned to the respective actuator. In the case of an air bellows, this can be, for example, a spiral spring arranged concentrically on the air bellows. In addition, however, other springs are also possible which provide sufficient spring deflection to cause the suction channel to pivot from a carpeted floor position into a hard floor position

It is proposed that the air bellows be assigned a valve, in particular a valve arranged in the suction channel, which can be actuated depending on the type of surface to be cleaned. By actuating the valve, the air bellows can be pressurized with air or evacuated, so that it expands or contracts. For this purpose, the valve is advantageously arranged in an air duct connected to a blower, in particular in the suction duct of the floor nozzle. Since the suction channel is already connected to the blower of the suction cleaning device, the air bellows can be evacuated via the suction channel when the valve is open, which leads to the air bellows contracting and thus to the suction channel being lowered onto the surface to be cleaned, which corresponds to the carpet position of the suction channel . When the valve is closed again, the air bellows is ventilated by the ambient air and advantageously expanded with the help of the restoring force of a spring assigned to the air bellows, so that the suction mouth is lifted off the surface to be cleaned, which corresponds to the hard floor position of the suction channel.

The valve can preferably be actuated automatically. For example, the valve has a communication connection to a control device, which actuates the valve depending on the type of surface currently to be cleaned. For this purpose, the floor nozzle can have a floor sensor, which detects the type of surface to be cleaned and forwards the measurement result to the control device, which then controls the actuation of the valve accordingly. The floor sensor can be, for example, a camera chip with the appropriate image processing software, an ultrasonic sensor, a tactile sensor, a contact switch or the like. The valve is actuated depending on the measurement result. The actuation can take place mechanically or else electrically or magnetically in a particularly simple manner. The actuation preferably takes place automatically, so that the user of the floor nozzle does not have to switch the valve manually. However, it is also possible for the user to actuate the valve manually (for example by means of a foot switch) and thus trigger ventilation or evacuation of the air bellows.

Brief description of the drawings

Fig. 1

ein Saugreinigungsgerät mit einer Bodendüse;

Fig. 2

einen Längsschnitt einer Bodendüse gemäß einer ersten Ausführungsform in einer Hartbodenstellung;

Fig. 3

die Bodendüse gemäß Figur 2 in einer Teppichbodenstellung;

Fig. 4

eine Bodendüse gemäß einer zweiten Ausführungsform in einer Hartbodenstellung;

Fig. 5

die Bodendüse gemäß Fig. 4 in einer Teppichbodenstellung;

Fig. 6

eine Bodendüse gemäß einer dritten Ausführungsform in einer Hartbodenstellung;

Fig. 7

die Bodendüse gemäß Fig. 6 in einer Teppichbodenstellung.

The invention is explained in more detail below using exemplary embodiments. Show it:

1

a suction cleaning device with a floor nozzle;

2

a longitudinal section of a floor nozzle according to a first embodiment in a hard floor position;

3

the floor nozzle according to figure 2 in a carpeted position;

4

a floor nozzle according to a second embodiment in a hard floor position;

figure 5

the floor nozzle according to 4 in a carpeted position;

6

a floor nozzle according to a third embodiment in a hard floor position;

7

the floor nozzle according to 6 in a carpeted position.

Description of the embodiments

figure 1 shows an example of a vacuum cleaning device 1 with a floor nozzle 2. The vacuum cleaning device 1 is designed as a hand-held vacuum cleaner. The floor nozzle 2 is designed as a separate attachment that can be removed from a base unit of the vacuum cleaning device 1 . In the usual way, the vacuum cleaning device 1 has a blower (not shown), with the help of which suction material can be picked up from a surface to be cleaned. For this purpose, the blower generates a flow of suction air which passes through a suction channel 4 of the floor nozzle 2 and of the vacuum cleaning device 1 .

The suction channel 4 opens into a suction mouth 23 on the bottom side, which extends in a plane E.

figure 2 shows a first embodiment of a floor nozzle 2 according to the invention. The floor nozzle 2 has a housing 3 in which a suction channel 4 is arranged. The suction channel 4 can be displaced relative to the housing 3 . In particular, it can be displaced in such a way that the suction mouth 23 is closer to the one to be cleaned Floor is moved or further removed from the floor to be cleaned.

The suction channel 4 is in the embodiment mentioned figure 2 pivotally mounted on the housing 3, here for example on a wheel axle 22 of a wheel 21 of the floor nozzle 2. The housing 3 has sealing elements 5 on the underside, which come into contact with a surface to be cleaned when the floor nozzle 2 is in a normal suction position. The sealing elements 5 are here, for example, bristle elements and sealing lips, which are set up on the surface to be cleaned when the floor nozzle 2 is in a hard floor position. The sealing elements 5 are firmly connected to the housing 3 . The free end area of the suction channel 4 opens into the suction mouth 23 of the floor nozzle 2 , which is formed between the sealing elements 5 . The suction channel 4 is flow-connected to the fan of the vacuum cleaning device 1 so that suction material arranged on a surface to be cleaned can be conveyed through the suction channel 4 into a dust chamber of the vacuum cleaning device 1 .

The suction channel 4 can be shifted from the hard floor position shown into a carpeted floor position. The pivoting movement of the suction channel 4 takes place by means of an actuator 6 and a gear 7 which connects the actuator 6 to the suction channel 4 . In the embodiment shown, the actuator 6 is an air bellows 9 and the gear 7 is a guide link 10. The air bellows 9 is rigidly connected to the guide link 10, so that when the air bellows 9 is evacuated or expanded, the guide link 10 is displaced in the direction of the Air bellows 9 or 9 comes away from the air bellows. The guide link 10 has an elongated hole with a guide surface 12 . An engagement element 11 of the suction channel 4 is held in the elongated hole so that it can be slid. The guide surface 12 has a slope from left to right in the illustration, along which the engagement element 11 of the suction channel 4 can slide. In addition, the engagement element 11 is linearly guided in the housing 3 so that it can perform an up and down movement, which is oriented essentially perpendicular to the displacement of the guide link 10 . The air bellows 9 is assigned a spring 8, the restoring force of which acts in the direction of the guide link 10, i.e. in the direction of the expanded state of the air bellows 9.

A valve (not shown) is assigned to the air bellows 9 , via which the air bellows 9 can be ventilated or evacuated. In its open position, this valve advantageously establishes a flow connection between the air bellows 9 and the suction channel 4 . The valve is actuated, for example, manually by means of a switch to be actuated by a user of the vacuum cleaning device 1 or automatically by means of an evaluation and control device of a floor recognition device, which recognizes the type of surface currently to be cleaned.

figure 3 shows the floor nozzle 2 in the carpeted position. In this case, the air bellows 9 is contracted, as a result of which the guide link 10 is also shifted to the right in the image plane of the figure. In this carpet floor position, the engagement element 11 has moved downwards to the left within the guide link 10, so that the suction channel 4 is shifted with its end region opening into the suction mouth 23 out of the housing 3 in the direction of the surface to be cleaned. In this position, the spring 8 assigned to the air bellows 9 is compressed against its restoring force.

The invention according to this embodiment takes place in such a way that either the user of the vacuum cleaning device 1 or the automatic floor recognition device recognizes the type of surface to be cleaned and, for optimal cleaning, controls the valve in such a way that either a hard floor position or a carpeted floor position of the floor nozzle 2 is initiated . The hard floor position, in which the suction mouth 23 is lifted off the surface to be cleaned, is particularly suitable for hard floors such as parquet, floorboards, laminate, tiles and the like. The carpeted floor position is particularly suitable for carpeted floors, rugs and the like.
Due to the restoring force of the spring 8 assigned to the air bellows 9, the suction channel 4 of the floor nozzle 2 is usually in the hard floor position, in which the suction mouth 23 is lifted from the surface to be cleaned. If the user thus moves the vacuum cleaning device 1 on a hard floor, the hard floor position remains unchanged. However, as soon as the vacuum cleaning device 1 is moved onto a rug or carpeted floor, the user or the automatic floor recognition device recognizes the changed type of surface to be cleaned and causes the valve to open, so that the air bellows 9 is evacuated, for example via the suction channel 4, which is subjected to negative pressure . As a result, the air bellows 9 contracts and, with its end region adjacent to the guide link 10, moves against the restoring force of the spring 8 in the direction of the traversing wheel 21, ie to the right in the figure. By connecting the guide link 10 to the air bellows 9, the guide link 10 is correspondingly shifted to the right, ie in the direction of the traversing wheel 21. The displacement of the guide link 10 takes place essentially in the horizontal direction. The engagement element 11 of the suction channel 4, which engages in the guide slot 10, migrates down the slope of the guide surface 12, so that the engagement element 11 is displaced in the vertical direction, ie perpendicular to the direction of displacement of the guide link 10, in the direction of the surface to be cleaned. At the same time, this causes the suction channel 4 to be lowered in the direction of the surface to be cleaned, with the suction channel 4 being pivoted out of the housing 3 with its free end area until the sealing elements 5 are no longer in engagement with the surface to be cleaned. The cleaning function is now mainly determined by the geometry of the suction channel 4 in this carpet position.

If the user then moves the vacuum cleaning device 1 from the carpet to a hard floor again, the suction channel 4 is shifted back in the direction of the housing 3 of the floor nozzle 2, so that the sealing elements 5 come into contact again with the surface to be cleaned and the hard floor in front of a Protect against damage caused by the suction mouth 23 or the housing 3 of the floor nozzle 2. In order to move the floor nozzle 2 from the carpeted floor position to the hard floor position, the user of the vacuum cleaning device 1 or the control and evaluation device of the floor detection device closes the valve of the air bellows 9 so that the air bellows 9 is aerated again and, with the support of the restoring force of the Spring 8 expands. As a result, the guide link 10 is also pushed away from the air bellows 9 at the same time, that is to say to the left in the plane of the figure. The engagement element 11 of the suction channel 4 moves up the incline of the guide surface 12 of the guide slot 10, as a result of which the suction channel 4 is simultaneously raised in the vertical direction. In this hard floor position, the housing 3 is spaced apart from the surface to be cleaned by the sealing elements 5 .

the figures 4 and 5 show a second embodiment of the invention, in which a coupling gear is provided as the gear 7 . According to this embodiment too, the actuator 6 is an air bellows 9 . The pivot axis 13 in turn is connected to the air bellows 9 in such a way that an expansion or evacuation of the air bellows 9 also results in a displacement of the pivot axis 13 . The first gear element 14 is connected in a stationary manner to the housing 3 of the floor nozzle 2 at the end region opposite the pivot axis 13 . The second gear element 15 is arranged on the suction channel 4 with the end region opposite the pivot axis 13 .

the figure 4 shows again the hard floor position of the floor nozzle 2, while the figure 5 shows the carpet position. In order to move from the hard floor position of the suction channel 4 to the carpeted floor position, the air bellows 9 is evacuated as previously explained. This reduces the length of the air bellows 9, so that the pivot axis 13 connected to the air bellows 9 is moved in the direction of the air bellows 9, that is to say to the right in the figures. As a result, the gear elements 14, 15 connected to the pivot axis 13 are pivoted away from one another, with the stationary mounting of the end region of the first gear element 14 opposite the pivot axis 13 causing a displacement of the suction channel 4 arranged on the second gear element 15. This shift is directed in the direction of the surface to be cleaned, so that the suction mouth 23 is shifted out of the housing 3 until it finally touches the surface to be cleaned and the sealing elements 5 lifts off the surface to be cleaned, so that only the Suction mouth 23 and the gear 21 of the floor nozzle 2 have contact with the surface to be cleaned. This carpeted position is in figure 5 shown. In order to get back to the hard floor position, the valve assigned to the air bellows 9 is closed again. This causes ventilation of the air bellows 9 with the resultant expansion of the air bellows 9 and displacement of the pivot axis 13 of the transmission 7 in a direction away from the air bellows 9 . The two gear elements 14, 15 are pivoted towards one another again in the manner of scissors, which leads to the suction channel 4 being raised. As the suction channel 4 pivots progressively, the sealing elements 5 again come into contact with the surface to be cleaned. In the end position, ie the hard floor position, the suction mouth 23 is again completely accommodated in the housing 3 of the floor nozzle 2 .

the figures 6 and 7 show a third embodiment of the invention, in which the gear 7 is designed as a rack and pinion gear. The actuator 6 is also an air bellows 9 here, which can be ventilated or evacuated via a valve. The gear 7 consists of a first rack 17 connected to the air bellows 9, a first gear 19 connected to the first rack 17, a second gear 20, which has a smaller number of teeth than the first gear 19, and one connected to the second gear 20 and the suction channel 4 connected second rack 18. The two racks 17, 18 are arranged perpendicular to each other, the first rack 17 being arranged in the horizontal direction and the second rack 18 in the vertical direction. The horizontal movement of the air bellows 9 is thus deflected into a vertical movement of the second toothed rack 18, which ultimately results in a pivoting of the suction channel 4 in the direction of the surface to be cleaned.

The invention according to this embodiment works in such a way that the air bellows 9, starting from the in figure 6 shown hard floor position is evacuated again, whereby the first toothed rack 17 is shifted to the right in the plane of the drawing, that is, towards the wheel 21. This causes the first and second gearwheels 19, 20 to rotate counterclockwise, which in turn leads to a vertical displacement of the second toothed rack 18 downwards, ie towards the surface to be cleaned. The transmission ratio between the first gear wheel 19 and the second gear wheel 20 reduces the force required to move the suction channel 4, so that the suction channel 4 can be moved particularly easily. Here, too, the suction channel 4 is shifted again until the suction mouth 23 protrudes beyond the plane spanned by the free end regions of the sealing elements 5, so that the floor nozzle 2 is only with the suction mouth 23 and the Verfahr 21 on the carpet. If the vacuum cleaning device 1 leaves the carpeted floor again and moves on a hard floor, the valve assigned to the air bellows 9 is closed again, the air bellows 9 is aerated and thus expands, so that the gear 7 works in the opposite direction and the suction mouth 23 again from the one to be cleaned surface.

Claims (8)

1. Floor nozzle (2) for a suction cleaning device (1), which nozzle comprises a housing (3) and a suction channel (4) arranged in the housing (3) for connecting to a fan of a suction cleaning device (1), it being possible to move the suction channel (4) from a hard floor position to a carpeted floor position or vice versa by means of an actuator (6), characterized in that the suction channel (4) is connected to the actuator (6) by means of a gearing (7) in such a way that the suction channel (4) can be moved, in particular pivoted, relative to the housing (3) as a result of actuation of the actuator (6), wherein the gearing (7) comprises a guide slot (10) which is movably arranged on the housing (3) and in which an engagement element (11) of the suction channel engages.
2. Floor nozzle (2) according to claim 1, characterized in that, during conventional suction operation, the guide slot (10) can be moved substantially parallel to a surface to be cleaned, relative to an orientation of the floor nozzle (2).
3. Floor nozzle (2) according to claim 1 or 2, characterized in that the guide slot (10) provides a sloped guide surface (12) for the engagement element (11) relative to a direction of movement towards the actuator (6) such that, during conventional suction operation, the engagement element (11) can be moved in the direction of the surface to be cleaned, relative to a position of the floor nozzle.
4. Floor nozzle (2) for a suction cleaning device (1), which nozzle comprises a housing (3) and a suction channel (4) arranged in the housing (3) for connecting to a fan of a suction cleaning device (1), it being possible to move the suction channel (4) from a hard floor position to a carpeted floor position or vice versa by means of an actuator (6), characterized in that the suction channel (4) is connected to the actuator (6) by means of a gearing (7) in such a way that the suction channel (4) can be moved, in particular pivoted, relative to the housing (3) as a result of actuating the actuator (6), wherein the gearing (7) comprises two gearing elements (14,15) pivotably connected on a common pivot shaft (13) which can be moved by means of the actuator (6), a first gearing element (14) being connected on one end to the pivot shaft (13) and on the other end to the suction channel (4), and a second gearing element (15) being connected on one end to the pivot shaft (13) and on the other end to the housing (3).
5. Floor nozzle (2) for a suction cleaning device (1), which nozzle comprises a housing (3) and a suction channel (4) arranged in the housing (3) for connecting to a fan of a suction cleaning device (1), it being possible to move the suction channel (4) from a hard floor position to a carpeted floor position or vice versa by means of an actuator (6), characterized in that the suction channel (4) is connected to the actuator (6) by means of a gearing (7) in such a way that the suction channel (4) can be moved, in particular pivoted, relative to the housing (3) as a result of actuating the actuator (6), wherein the gearing (7) is a rack-and-pinion gearing (16) or toothed gearing which is connected on one end to the suction channel (4) and on the other end to the actuator (6).
6. Floor nozzle (2) according to one of the preceding claims, characterized in that a spring (8) is associated with the actuator (6), the restoring force of which spring is directed in the direction of a preferred position of the suction channel (4), in particular in the direction of a hard floor position of the suction channel (4) that is moved into the housing (3).
7. Floor nozzle (2) according to one of the preceding claims, characterized in that the actuator (6) comprises an air bellows (9).
8. Floor nozzle (2) according to claim 7, characterized in that a valve, in particular a valve arranged in the suction channel (4), is associated with the air bellows (9), which valve is actuatable, in particular automatically actuatable, depending on the type of surface to be cleaned.

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