TW201628544A - Suction nozzle with supporting wheel - Google Patents

Abstract

A suction nozzle used as an accessory and/or a component of a vacuum cleaner for caring a floor is disclosed, in which the floor is particularly referred to a carpet and/or hard floor. The suction nozzle is provided with a base body having a bottom surface provided with a supporting wheel and a floor surface recognizing device, in which the supporting wheel can be raised and sunk relative to the bottom surface, and the floor surface recognizing device is configured such that the supporting wheel can be raised or sunk according to a recognized floor surface.

Description

Nozzle with support wheel

The invention relates to a nozzle for the care of the floor as an attachment and/or component of a vacuum cleaner, in particular a carpet and/or a hard floor, in particular, the nozzle having a base on its underside provided with a support wheel and having a surface layer Identification device.

It is generally known in practice that the suction nozzle of a vacuum cleaner is also referred to as an attachment, and is simply referred to as a suction nozzle or a suction nozzle called a hard bottom nozzle or an electric vacuum cleaner according to the purpose of use. A vacuum cleaner having such a nozzle typically has a base housing in which an electrically driven air extractor motor for generating an intake air flow is provided. The dust and/or dust particles entrained from the ground to be treated or to be cleaned by the suction air are mostly concentrated in the dust filter bag in the dust collection chamber provided in the base casing. The nozzle is typically fluidly sealed to the vacuum cleaner via a flexible suction hose and/or steering tube. In the vacuuming robot, the nozzle itself is generally integrated into the base housing.

The nozzles mentioned are formed as external accessories that can be connected to the vacuum cleaner by suction hoses, components of the vacuum cleaner or vacuuming robots, usually with wheels or slides through which the nozzles can be moved in the direction of travel on the ground. For example, in the attachment "Kobold EB370" sold by the applicant, rigid, barrel-shaped support wheels and pulleys are provided, while passive ground nozzles are provided. There are often skateboards mentioned. A disadvantage of the rigid support wheel and similarly for the pulley and the slide is that the support wheel is forced transversely to its direction of rotation during the course of the nozzle turning. Depending on the design of the respective floor surface and the nozzle, especially on hard floors and possibly on carpets, high steering forces are required for the steering of the nozzles. This problem is dealt with in the prior art by manually switching between the use on the hard floor or the use on the felt floor, however this is not a satisfactory solution.

In this case, it is an object of the present invention to provide a nozzle that is easy to handle or steer on different types of ground. It is a particular object of the present invention to provide a nozzle that can be turned with minimal steering force on both the carpet and the hard floor.

The object of the invention is achieved by a subject in an independent request, the preferred extension being set forth in the dependent claims.

The invention therefore consists in a nozzle for the care of the floor, in particular as an attachment and/or component of a vacuum cleaner, in particular a carpet and/or a hard floor, the nozzle having a base on its underside provided with a support wheel and There is a surface surface recognition device in which the support wheel can be raised and lowered relative to the bottom surface, and the ground surface recognition device is arranged to raise or sink the support wheel according to the identified ground surface layer.

The technical solution of the present invention is that the suction nozzle, in particular the suction opening of the suction nozzle, can be raised from the ground by the extension of the support wheel, wherein only the local surface surface recognition device recognizes the ground surface layer as a hard floor, and the support wheel according to the present invention Extend. The suction port is preferably an opening of the nozzle on the ground side, carrying dirt The air is drawn into the nozzle through the suction port. According to one embodiment, an air passage is provided in the suction nozzle, and air entering the suction port through the air passage reaches the connecting member through the suction nozzle, and the connecting member can be connected to the vacuum cleaner. The intake air is directed in the connector in a suitable manner. The connecting piece is preferably formed as a rotary/tilt joint, wherein the tilting axis of the rotary/tilt joint particularly preferably overlaps the rotating shaft of at least one pulley and preferably two pulleys through which the suction nozzle in the region of the rotating/tilting joint passes or Supported on the ground. One or more pulleys provided on the swivel/tilt joint are in turn referred to in particular as a travel cradle.

Furthermore, the technical solution of the present invention consists in avoiding the vacuum fixing of the suction opening on the hard floor by extending the support wheel. The vacuum fixing of the suction opening on the hard floor is often caused in a vacuum cleaner known in the art, that is, when the user pulls up the suction nozzle or pulls up the suction nozzle (return) particularly during the unconscious lifting of the rear of the vacuum cleaner. Hard floor in the present invention preferably refers to a floor or floor covering having no fibers on its top surface or no fibers on its surface.

The nozzle preferably has a support wheel that can be swung, and when the support wheel is extended, it can be moved on the ground by the support wheel. By means of the support wheel, the distance between the component or section of the nozzle and the ground, when the nozzle is placed on the ground, preferably at least on the ground side of the suction chamber of the suction nozzle (also called the suction opening or the suction opening) Internal, and/or at least varied in the area of the support wheel. The variation in spacing, especially in the area of the support wheel, is achieved depending on the surface of the floor or the ground. According to the invention, means for identifying the surface layer of the ground are provided. The ground surface recognition device is advantageously arranged on the underside of the basic body, preferably in front of the suction nozzle in the direction of travel of the suction nozzle. In addition, the selected one is used to illustrate the single nozzle The terminology of the arrangement of the components is based on the position and orientation of the nozzles in the operating state when the ground is sucked.

The suction nozzle suitably has a suction opening on its ground side at its front end and a rotary/tilt joint and/or a travel chassis at its rear side end. The surface surface detecting device is capable of detecting the nature of the surface layer in the area between a suction port and the traveling chassis.

A small steering force is generally required when the nozzle is manipulated or turned on the felt floor, while a larger steering force is required on the hard floor. According to the present invention, when the identification is on a hard floor, the support wheel is lowered or protrudes from the base, which significantly facilitates manipulation and steering on the hard floor. In a preferred extension, the surface surface recognition device is arranged to raise the support wheel or pull the support wheel into the base when the carpet is identified. Properly synchronized with the rise of the support wheel, the sealing unit defining the suction opening is also raised or brought close to the bottom or bottom surface. In an advantageous manner, the sealing unit is formed by two seals which are preferably formed as sealing lips, which advantageously extend along the long sides of the rectangular or approximately rectangular suction opening in the invention. According to an embodiment, when the local surface layer detecting device detects the carpet, the sealing unit preferably moves toward the ground in synchronization with the extension of the support wheel. When the sealing unit and the support wheel are raised, the suction port is preferably placed directly on the ground.

When the operator moves the nozzle over a different surface layer, the wheel is lowered on the hard floor according to the design, so it is also preferred to raise the nozzle relative to the ground and the support wheel is raised on the carpet preferably with respect to the ground. The decline is associated. The support wheel can be formed as a sway wheel, an omnidirectional wheel, a ball wheel or the like. Advantageously the support wheel is oriented parallel or substantially A first axis of rotation that is parallel to the ground direction and a second axis of rotation that is oriented at a given angle relative to the first axis of rotation, according to an embodiment. The second axis of rotation is calibrated to a bottom surface of the substrate that is preferably perpendicular or nearly perpendicular to the ground or nozzle.

By providing a support wheel that is preferably rotatable, the spacing between the support wheel nozzle and the ground can be varied at least in the region of the support wheel depending on the ground surface on which the nozzle moves, so that the carpet is also hard in a particularly simple manner. The handling or steering of the nozzle is achieved on the floor. As opposed to a fixed support wheel, the support wheel is preferably shaped to be swingable and the raising or sinking of the support wheel is preferably automated according to the identified ground surface condition, the proposed nozzle and other known designs in the prior art. Compared to its characteristic is the steering force that is reduced during cornering.

With the proposed nozzle, the floor with different plies is easy to clean and does not clean carpets or hard floors (eg tiles, PVC, laminate, carpet, cork, etc.) as is known in the prior art. Parquet floor) and need to manually switch the nozzle. Elevation refers to moving the support wheel in the direction of the base such that the distance between the ground and the base or bottom surface is reduced at least within the range of the support wheel when the nozzle is placed flat on the ground. Correspondingly, sinking preferably means that the distance between the ground and the base or the bottom surface increases at least in the range of the support wheel when the suction nozzle is placed flat on the ground, that is, the support wheel moves in a direction away from the base body.

According to a preferred embodiment, the floor surface recognition device is arranged such that at least the identified floor surface is distinguished between the carpet and the hard floor, and/or the nozzle is arranged such that it is only recognized by the surface surface recognition device. When the floor surface is a hard floor, the support wheel is lowered or extended. The floor surface recognition unit is formed under such conditions that carpets and/or hard floors are recognized. It is recommended that the support wheel be extended only when the local surface recognition unit recognizes the hard floor. When the ground surface recognition device recognizes the carpet, the ground surface recognition unit activates the retraction or elevation of the support wheel in an advantageous manner. Within the framework of the present invention, the surface surface identification unit detects the surface layer properties in front of and/or behind the suction port. In front of the suction port, in particular, the floor surface recognition unit performs ground surface recognition between the end face of the suction nozzle and the suction port in the forward direction. According to an embodiment, the surface surface recognition unit performs ground surface recognition between the suction port in the forward direction or the connection terminal of the suction port and the floor nozzle. The terminal meaning is preferably the end of the ground nozzle opposite the suction port, the connection terminal having a connection position for connection to the vacuum cleaner.

According to a further preferred design, the surface surface recognition device is shaped as an ultrasonic transducer, an ultrasonic transmitter and/or receiver, a piezoelectric element and/or a piezoelectric crystal, and/or a frequency greater than 30 kHz is used to identify the ground surface layer. The reflection or absorption properties of the surface layer are determined by the amplitude of the signal reflected from the ground. Within the framework of the invention, the ground surface recognition unit controls the extension of the support wheel, particularly on the hard floor, when the amplitude or echo variation of the signal reflected from the ground corresponds to the first characteristic curve stored in the surface surface recognition unit. . According to an embodiment, when the amplitude or echo variation of the signal reflected from the ground corresponds to the second characteristic curve held in the ground surface recognition unit (the second characteristic curve is different from the first characteristic curve), the support can be contracted Go back to the retracted position in the base. When the nozzle is in the usual push When moving in the direction of the shift (forward and backward), an intermediate value is advantageously formed first by the received signal, for example a low-pass filter is used for this purpose. By means of a series connected comparator, it is thus possible to reliably distinguish between different ground surfaces.

In order to enable the carpet to be reliably distinguished from the hard floor, it is preferred to use ultrasonic waves having a frequency of at least 30 kHz, preferably at least 40 kHz. A frequency range of 35-60 kHz has generally proven to be particularly advantageous. In principle, the surface surface recognition unit can have an ultrasonic source having a frequency of 60 to 150 kHz. As long as the same ultrasonic transducer is used both as an ultrasonic transmitter and as a receiver, then a continuous switching between transmission and reception is preferred. Optionally, the ultrasonic transducer is continuously coupled to the pulse generator and the pulse booster.

Applicant's experiments have shown that, according to one embodiment, hard floors and carpets can be distinguished by comparing the amplitude of the reflected sound waves to a predetermined threshold. Preferably, the sound wave intensity is above the critical value to be the ground, and when the measured value is within the critical value, it is a carpet. In any case, by this design, that is, preferably by means of an ultrasonic transducer, the ground surface layer is distinguished between the carpet and the hard floor in a reliable manner.

In order to ensure that the suction nozzle is vacuum-fixed on the hard floor, according to a preferred extension, the size of the support wheel is such that when the nozzle is placed flat on the ground and the support wheel sinks, the spacing between the ground and the bottom surface is 3mm, preferred 5mm or 7mm. The vacuum is fixed in the present invention, and the thrust required for the forward movement of the nozzle laid flat on the ground exceeds a predetermined threshold and/or the suction port is close to the ground when the traveling chassis is raised from the ground. . In the case where the support wheel is raised or retracted, preferably in the case where the support wheel is fully raised, the suction nozzle is at least partially attached to the ground. When the support wheel protrudes from the base body, it is particularly preferred that the suction nozzle is only placed on the base with the pulley provided on the base body and the support wheel is laid flat on the ground. According to an embodiment, the pulley of the travel chassis has a rotating shaft, which preferably overlaps the tilting axis of the tilt joint. In an advantageous manner, the suction channel which leads through the basic body is electrically connected to the tilting connection, wherein the tilting connection can be formed as a rotary/tilt joint. Suitably, the suction nozzle can be connected to the vacuum cleaner or the suction pipe of the vacuum cleaner via a tilt joint. Preferably, the support wheel can be raised and/or lowered stepwise, such that, for example, according to a correspondingly identified hard floor, such as a solid wood floor or tile, the different distance between the ground and the bottom surface can be automatically adjusted, at least in the region of the support wheel.

According to another preferred development, the support wheel is arranged in the base body in the raised state. Preferably, the support wheel is completely disposed within the base in the raised state such that the nozzle is easily manipulated on the carpet and the support wheel and/or the ground is protected from damage. To this end, the base body can, for example, be provided with a recess extending from the base toward the base body, into which the support wheel can be retracted so as to be completely disposed within the base body in the raised state. According to an embodiment, the support wheel can be retracted under such conditions that the support wheel is held in the retracted state without contact with the ground. It is possible that a portion or a section of the support wheel protrudes from the base in the retracted state of the support wheel.

There are many possibilities for designing and operating a raised or sunken support wheel. Particularly preferably, the support wheel is mounted on the base body in such a manner as to be rotatable about an axis substantially perpendicular to the bottom surface of the base body of the nozzle, wherein the vertical axis, when the nozzle is placed on the ground, preferably corresponds to the normal to the ground And/or the normal of the bottom surface corresponding. It is further preferred to design the support wheel such that it can rotate around the axis at 360°. In the design, the support wheel is preferably formed as a ball wheel or a so-called omnidirectional wheel.

In order to retract and extend the support wheel, ie to raise and sink, according to a preferred development, the suction nozzle has an electric and/or elastically actuated actuating device for supporting the wheel, by means of which the support wheel can In the case of a suction nozzle placed on the ground, it can protrude from the basic body for sinking in the direction of the ground and/or can be retracted into the basic body for lifting, wherein the actuating device can be controlled by the ground surface recognition device . The actuator preferably has a motor for sinking or raising and/or pneumatic, hydraulic or other mechanically driven means.

The spring force is preferably further designed to automatically bring the support wheel into an elevated state when the nozzle and/or the vacuum cleaner connected to the nozzle are closed. Further preferably, a controller, a microprocessor, a microcontroller or the like is provided in the nozzle, by which the control of the surface surface recognition device and the execution device is realized. The surface layer is detected by the controller, preferably, for example, after every 20 ms, the surface layer is controlled, and the support wheel is raised or lowered by the actuator according to the detection result.

According to a preferred embodiment, the suction nozzle has at least one pulley, wherein the pulley in the usual direction of travel is arranged on the rear side of the suction nozzle and the support wheel is preferably arranged spaced apart from the pulley in the direction of travel. Preferably, the pulley is formed as a caster whose shaft is supported on a bottom surface area of the base. In another design, the pulley is likewise arranged on the front side of the suction nozzle in the direction of travel, the support wheel being arranged spaced apart from the pulley opposite to the direction of travel. Make the user easier by setting the pulley The manner in which the nozzle is moved, in which the support wheel, in particular on the hard floor, is significantly easier to handle or steer according to the solution given within the scope of the invention.

Preferably, the suction nozzle has a suction passage and a suction chamber for guiding an intake air flow for cleaning the floor, wherein the suction chamber is closed at the bottom surface by the suction port. The suction channel preferably leads into the suction chamber, wherein the suction chamber is arranged on the front side of the suction nozzle in the direction of travel. The support wheel is disposed between the suction chamber and the rear side of the nozzle according to an embodiment. According to this design, the support wheel is arranged in the direction of travel, also called the process, preferably directly behind the suction chamber (also called the suction nozzle or the nozzle opening), and is arranged to protrude from the base body. Preferably, the support wheel can extend from the base body or into the base body between the suction nozzle opening and the oblique joint. The suction chamber or the suction nozzle that limits the suction chamber at the bottom side is preferably defined by a circumferential brush, an elastic sealing lip and/or combinations thereof. The brush or elastic sealing lip preferably extends from the bottom facing the ground and seals the suction chamber with the nozzle placed on the ground and at least in the case of a support wheel. When a pulley is provided, the suction nozzle is preferably placed on the ground with only one pulley or a plurality of pulleys and a brush or an elastic sealing lip, at least when the support wheel is raised. When the support wheel sinks, the suction nozzle is preferably laid flat with only the support wheel, one pulley or a plurality of pulleys. In principle it is possible to raise the brush and/or the sealing lip when the support wheel enters the basic body. It is recommended that when the support wheel enters the base body, the frame that surrounds the suction port at the suction port or on the base side is placed on the ground. Within the framework of the present invention, the brush and/or sealing lip extend when the support wheel projects from the base. When the brush and/or the sealing lip are extended, they protrude further from the substrate on the ground side than when the brush and/or the sealing lip are raised.

The size of the support wheel is preferably such that when the support wheel is fully extended, the brush or the elastic sealing lip is further close to the ground or the distance between the ground and the brush or the elastic sealing lip measured on the hard floor is 1mm, 2mm, or 3mm, and / or 2mm, 3mm or 5mm. The suction channel is preferably electrically connected through the basic body, wherein the suction channel on the top surface of the base body can be fluid-tightly connected to the vacuum cleaner via a flexible suction hose and/or a control tube. In the vacuum cleaner, it is preferable to provide a dust collection chamber in which dust and/or dust particles entrained from the ground by the suction air flow are collected in the dust filter bag. In the vacuuming robot, the suction nozzle is integrated into the base body itself such that the suction passage can be directly passed to the dust collection chamber, thereby making the base body equivalent to the base housing of the vacuum cleaner.

In principle, there are different possibilities for the design of the suction chamber. According to a particularly preferred embodiment, the suction chamber is formed at least on one side, preferably on both sides, at least partially open, which extends transversely to the direction of travel of the nozzle and preferably has a drive in the passage, along the transverse direction. A brush for the care of the ground that extends in the direction of the direction of travel. The opening through the side of at least one side of the channel is achieved, the fine dust reception is not only done under the suction nozzle itself (ie in the suction chamber formed by the passage), but also within the range outside the suction nozzle, in particular Inhaled in a place where at least part of the side of the channel is open. In this way, an effective width is reached in which fine dust moves through the suction nozzle while it is sucking the ground, which width is wider than the physical width of the suction chamber constituted by the nozzle passage. The brush is preferably electrically driven or turbine driven, such that it is specially shaped as a brush located in the suction chamber and brushing the ground to be sucked. The brush removes excess dirt from the ground and can then be absorbed by the suction stream and sucked.

According to a very particularly preferred extension in this context, the setting is relative to Two pulleys opposite the suction passage. When the support wheel sinks, the suction nozzle, especially the suction nozzle on the hard floor, preferably has only three support points, namely the two pulleys and the support wheels that are turned together. The nozzle can be significantly more easily rotated on the hard floor than the design known in the prior art because the support wheel passively supports the steering movement and enables the steering wheel to be easily displaced.

According to a preferred development, the support wheel is formed as an oscillating wheel and the roller is fixed between the two fork arms of the wheel fork, wherein the wheel fork is held by the rotary bearing on the base body which can be changed in height for raising and sinking Cylindrical part. The cylindrical portion preferably extends perpendicular to the bottom surface. The roller preferably rotates about a fixed axis on both sides in the fork arm, the shaft preferably extending in space parallel to the bottom surface of the base of the nozzle and/or parallel to the extension of the ground when the nozzle is placed on the ground.

The object of the invention is also achieved by a vacuum cleaner or vacuuming robot having a nozzle as described above, and by a method for raising or sinking a support wheel of a suction nozzle, wherein the nozzle is specifically designed for use in care An attachment and/or component of a floor, in particular a carpet and/or hard floor vacuum cleaner, and having a base on its underside provided with a support wheel, comprising the steps of: identifying a surface layer and aligning the support wheel with respect to the identified surface layer The bottom surface is raised or sunken. The preferred extensions and advantages of the vacuum cleaner, vacuuming robot and/or method are similar to those of the previously described vacuum cleaner for the skilled person.

1‧‧‧ vacuum cleaner

2‧‧‧Processing tube

3‧‧‧ base shell

4‧‧‧ nozzle

5‧‧‧ Ground

6‧‧‧ base

7‧‧‧ bottom

8‧‧‧Inhalation room/ground

9‧‧‧Inhalation channel

10‧‧‧ pulley

12‧‧‧Swing wheel

13‧‧‧ arrow

14‧‧‧Execution device

15‧‧‧ Sealing lip

16‧‧‧Seal

17‧‧‧ Ground surface recognition device

18‧‧‧Roller

19‧‧‧ Fork Arm

20‧‧‧ wheel fork

21‧‧‧Rotary bearings

22‧‧‧Cylindrical components

23‧‧‧Inhalation

R‧‧‧ Direction of travel

The invention will be explained in more detail below on the basis of the preferred embodiments with the aid of the figures.

Shown in the drawing 1 shows a vacuum cleaner with a suction nozzle according to a preferred embodiment, which is formed as a hand-held vacuum cleaner, FIG. 2 shows a suction nozzle according to FIG. 1 with a sunken support wheel in a side view. 3 shows a nozzle according to FIG. 2 with a raised support wheel in a side view, and FIG. 4 shows the support wheel according to FIG. 2 in a perspective detail view.

Figure 1 shows a vacuum cleaner 1 having a processing tube 2, a base housing 3 and a suction nozzle 4 formed as a detachable attachment, which is placed on the ground 5. A dust collecting chamber (not shown) is disposed in the base casing 3, and a dust filter bag is disposed in the dust collecting chamber, and dust and/or dust particles entrained from the ground 5 to be treated or to be cleaned by the suction airflow are in the dust filter bag. Gathered in. Furthermore, a fluid tight connection is formed between the suction nozzle 4 and the dust collection chamber.

Figure 2 shows the nozzle 4 in a side view. The suction nozzle 4 has a base body 6 made of plastic, the bottom surface 7 of which is aligned flush with the ground surface 5. On the front side in the direction of travel r of the suction nozzle 4, a passage extending in the base body 6 transversely to the direction of travel r (process) is formed as a suction chamber 8. The suction chamber 8 has a suction port 23 that opens to the ground 8, and when the floor 5 is cleaned, the suction airflow enters the suction chamber 8 through the suction port 23. A brush (not shown) may be provided in the suction chamber 8 for removing dust and/or dust particles from the ground 5. The suction chamber 8 is fluid-tightly (not shown) connected to a suction channel 9 provided on the suction nozzle, which is in fluid-tight connection with the base housing 3 of the vacuum cleaner 1 via a rotary tilt joint, not shown. The dust and/or dust particles entrained by the suction air flow from the suction chamber 8 to the dust collection chamber of the vacuum cleaner 1 in this way.

The rear side of the suction nozzle 4 is provided with two pulleys 10 which are oppositely disposed on the side of the suction nozzle 4 with respect to the suction passage 9. The two pulleys 10 are formed as casters and thus allow a simple movement of the suction nozzle 4 in the direction of travel r.

In order to enable the suction nozzle 4 to be easily turned or manipulated, in particular on a hard floor, the suction nozzle 4 has a single support wheel which is shaped as an oscillating wheel 12 according to an embodiment, which can be raised and lowered relative to the bottom surface 7 (shown by arrow 13) ). An actuator 14 having an electric drive for raising or sinking the oscillating wheel 12 is provided in the base body 6. 2 shows a state in which the oscillating wheel 12 is lowered, in which state the oscillating wheel 12 is placed in contact with the ground 5, and FIG. 3 shows a state in which the oscillating wheel 12 is raised.

In the raised state, the oscillating wheel 12 is completely disposed within the base 6. Correspondingly in Fig. 2, the suction nozzle 4 stands on the ground 5 only with the oscillating wheel 12 and the two pulleys 10. The flexible sealing lip 15 defining the suction chamber 8 in the direction of travel r and the seal 16 defining the suction chamber 8 on the rear side and the lateral side are not in contact with the ground 5 in the sunken state of the oscillating wheel 12 shown in FIG. Rather, it has a gap of approximately 2 mm from the ground 5. In the state where the oscillating wheel 12 shown in Fig. 3 is raised, the seal lip 15 and the seal member 16 stand on the floor 5. When the floor is in the form of a carpet, the nozzle 4 can be easily manipulated or turned in a state where the oscillating wheel 12 shown in Fig. 3 is raised, and it is impossible to achieve such a good manner on the floor 5 of the hard floor.

Preferably, a surface surface recognition device 17 is provided according to an embodiment for identifying a ground surface layer designed as a carpet or a hard floor. The ground surface recognition device 17 is designed for this purpose as an ultrasonic transmitter and an ultrasonic receiver and is arranged in front of the sealing lip 15 on the bottom surface 7 on the front side of the suction nozzle 4 . During the operation of the suction nozzle 4, that is, the suction nozzle 4 is loaded by the suction airflow, moving in the traveling direction r (process) At this time, the surface surface layer identifying means 17 regularly transmits an ultrasonic signal of more than 30 kHz to the ground 5 to be treated, for example every 20 ms. The echo signal of the ultrasonic signal reflected from the ground 5 can be used to identify whether the floor 5 treated by the nozzle 4 is a hard floor or a carpet. Within the framework of the present invention, a predetermined threshold value is exceeded for the hard floor, and the critical value is not the carpet.

Figures 2 and 3 show that the swing wheel 12 is sunk by the actuator 14 when it is recognized that the floor 5 is a hard floor, i.e., reaches the position shown in Figure 2, and the swing wheel 12 is reached when the carpet is identified. The position shown in Figure 3. Since the surface surface recognition device 17 continuously emits ultrasonic waves for identifying the surface layer of the ground and analyzes the reflected sound waves, in the operation of the suction nozzle 4, the various identified ground surface layers corresponding to the treated ground 5 are automatically raised or lowered without interruption. Swing wheel 12.

When the surface surface recognition device 17 recognizes that the ground 5 has changed from a carpet to a hard floor, the actuator 14 then lowers the swing wheel 12. In the lowered state, the distance between the floor 5 to be cleaned and the bottom surface 7 of the base of the nozzle 4 is, for example, 5 mm, wherein the sealing lip 15 and the sealing member 16 are sized such that they are located on the ground 5 with a gap of about 2 mm. Above. After the suction nozzle 4 or the vacuum cleaner 1 connected to the suction nozzle 4 is closed, when no suction airflow acts on the ground 5, the oscillating wheel 12 autonomously returns to the raised state due to the set elastic force.

Although there are many possibilities for arranging the oscillating wheel 12 on the bottom surface 7, the arrangement shown in Fig. 2 is shown to be particularly advantageous: first, the ground surface recognition device 17 is placed on the bottom surface 7 on the front side of the suction nozzle 4, in the suction The rear side of the mouth 4 is followed by a sealing lip 15 which extends transversely to the direction of travel r. The rear is likewise a suction chamber 8 which extends transversely to the direction of travel r and which is defined on the rear side by a seal 16 . Next, a swing wheel 12 is provided which is spaced from the pulley 10. slip The wheel 10 is disposed adjacent to the rear side of the suction nozzle 4.

In the embodiment, two pulleys 10 and a single oscillating wheel 12 are provided, which are arranged at the corners of the triangle from the top view of the suction nozzle 4, and a plurality of oscillating wheels 12 can likewise be provided. There are also different possibilities for the design of the oscillating wheel 12, wherein the design of the barrel roller 18 has proven to be particularly advantageous in the design shown in FIG. The barrel roller 18 is fixed between the two fork arms 19 of the fork 20, wherein the fork 20 is held on the cylindrical member 22 by a rotary bearing 21. The cylindrical member 22 is also arranged to be able to change the height on the base 4 by the actuator 14 to raise or sink the oscillating wheel 12.

4‧‧‧ nozzle

5‧‧‧ Ground

6‧‧‧ base

7‧‧‧ bottom

8‧‧‧Inhalation room/ground

9‧‧‧Inhalation channel

10‧‧‧ pulley

12‧‧‧Swing wheel

13‧‧‧ arrow

14‧‧‧Execution device

15‧‧‧ Sealing lip

16‧‧‧Seal

17‧‧‧ Ground surface recognition device

22‧‧‧Cylindrical components

23‧‧‧Inhalation

Claims (12)

a nozzle as an attachment and/or component of a vacuum cleaner, in particular for caring for the ground, in particular a carpet and/or a hard floor, the nozzle having a base body provided with a support wheel on the bottom surface, and The nozzle has a surface surface layer identifying device, wherein the support wheel is capable of raising and sinking relative to the bottom surface, and the ground surface layer identifying device is configured to make the support wheel according to the ground surface layer recognized by the ground surface layer identifying device Raise or sink. A nozzle according to claim 1, wherein said floor surface recognition means is arranged to subsequently lower or extend the support wheel only when the floor surface recognized by said surface surface recognition means is a hard floor. The nozzle of claim 1 or 2, wherein the surface surface identification device is designed as an ultrasonic transducer, an ultrasonic transmitter and/or receiver, a piezoelectric element and/or a piezoelectric crystal, and/or using a magnitude greater than 30 kHz Frequency to identify the surface layer of the ground. The nozzle of any one of claims 1 to 3, wherein the size of the support wheel is set such that when the nozzle is placed on the ground and the support wheel sinks, the ground and the The spacing between the bottom surfaces is at least in the region of the support wheel 3mm, 5mm or 7mm. The nozzle of any one of claims 1 to 4, wherein the support wheel is disposed in the base body in an elevated state and/or the suction nozzle is designed such that by closing the nozzle and/or A vacuum cleaner connected to the suction nozzle guides the support wheel to an elevated state. The nozzle of any one of claims 1 to 5, wherein the support wheel is rotatably mounted on the base about an axis substantially perpendicular to the bottom surface. A nozzle according to any one of claims 1 to 6, the nozzle having an electric and/or elastically driven actuator for the support wheel, by means of the actuator, at the nozzle When placed on the ground, the support wheel can protrude from the base body in the direction of the ground for sinking and/or can be retracted into the base body for lifting, wherein preferably The ground surface recognition device controls the execution device. The nozzle of any one of claims 1 to 7, the suction nozzle having a suction chamber shaped to extend at least partially on one side, preferably at least partially open, transverse to the direction of travel of the nozzle The passage, and preferably wherein a driven brush for the care of the ground extending transversely to the direction of travel is provided in the passage. A nozzle according to any one of claims 1 to 8, wherein two pulleys are provided opposite to the suction slot. A nozzle according to any one of claims 1 to 9, wherein the support wheel is formed as a swing wheel and has a roller fixed between the two fork arms of the fork, wherein the fork is held by a rotary bearing A cylindrical member that can be changed in height by lifting or sinking the support wheel on the base. A vacuum cleaner or a vacuum cleaner having the nozzle of any one of claims 1 to 10. A method for raising or sinking a support wheel of a suction nozzle, the suction nozzle being embodied in particular as a base for care, in particular carpets and/or hard floors The attachment of the vacuum cleaner and/or the suction nozzle of the component and having a base body provided with a support wheel on the bottom surface, the method comprising the steps of: identifying the surface layer of the ground, and raising the support wheel relative to the bottom surface of the base body according to the identified ground surface layer Or sinking.