Hard Surface Cleaning Equipment

Abstract

In order to further improve the operation of a hard surface cleaning device, in particular in the form of a window cleaning device, the hard surface cleaning device has a cleaning surface and a liquid applying device for applying liquid to the surface to be cleaned, the cleaning surface being configured to rest against the surface to be cleaned and to move on the surface to be cleaned, and the liquid applying device comprising at least one liquid outlet for delivering cleaning liquid to the surface to be cleaned, the present invention proposes that the at least one liquid outlet is arranged or constructed in an area bounded by the cleaning surface.

Description

Technical Field

[0001] The invention relates to a hard surface cleaning device, in particular a hard surface cleaning device in the form of a window or glass cleaning device, which has a cleaning surface and a liquid application device for applying liquid to the surface to be cleaned, the cleaning surface being configured to rest against the surface to be cleaned and to move on the surface to be cleaned, and the liquid application device comprising at least one liquid outlet for delivering cleaning liquid to the surface to be cleaned. Background Art

[0002] A hard surface cleaning device of the type mentioned at the outset, for example in the form of a window cleaning device, is known from DE 35 06 337 A1. With this known device, cleaning liquid can be applied to the cleaning surface via a nozzle. However, a disadvantage of this known device is that the cleaning liquid is applied to the cleaning surface in the form of a spray, just as, for example, a cleaning liquid for glass provided from a bottle is applied to the glass to be cleaned using a hand pump. Due to the spray, the cleaning liquid is always applied to the area near the surface to be cleaned. Summary of the invention

[0003] It is therefore an object of the present invention to further improve the operation of a hard surface cleaning device of the type mentioned at the outset.

[0004] In a hard surface cleaning device of the type mentioned at the outset, this object is achieved according to the invention in that at least one liquid outlet is arranged or formed in a region delimited by the cleaning surface.

[0005] The proposed improvement scheme can realize, in particular, that the cleaning liquid is applied only to the surface to be cleaned, so that no free spray is generated. In particular, the cleaning liquid is applied only when the cleaning surface is in contact with the surface to be cleaned. Therefore, when the cleaning liquid is applied through at least one liquid outlet, the surrounding vicinity of the surface to be cleaned is free from being undesirably loaded with the cleaning liquid. In this way, it is possible to clean and simply operate the hard surface cleaning device. As proposed, the surface to be cleaned is wetted with the cleaning liquid only within the area bounded by the cleaning surface. Therefore, there is no need for tedious reprocessing of the surface area that is not to be cleaned and removal of excess cleaning liquid. Overall, the operation of the hard surface cleaning device is simplified and improved.

[0006] Advantageously, at least one liquid outlet is arranged or constructed behind or in a plane defined by the cleaning surface. This design makes it possible, in particular, to dispense cleaning liquid only in the area bounded by the cleaning surface. To this end, the cleaning surface of the hard surface cleaning device does not have to be completely closed. For example, it may be permeable to liquid or may have one or more indentations through which cleaning liquid escaping from the at least one liquid outlet can be applied to the surface to be cleaned.

[0007] Advantageously, especially also in the case of hard surface cleaning devices of the type mentioned at the outset, the at least one liquid outlet is arranged or designed closer to the front end of the cleaning surface than to the rear end of the cleaning surface. Closer to the front here means, in particular, the front end of the cleaning surface in the direction of movement when the hard surface cleaning device is held as intended by the user. If the hard surface cleaning device is placed, for example, against a vertical surface to be cleaned (for example a window pane), the cleaning liquid will overflow from the at least one liquid outlet and flow along the pane due to gravity, wherein the cleaning liquid is then always and particularly reliably applied within the area bounded by the cleaning surface.

[0008] Depending on the size and shape of the cleaning surface, it may be advantageous, especially also in the case of hard surface cleaning devices of the type mentioned at the outset, for the hard surface cleaning device to have two or more liquid outlets. In particular, three, four or even more liquid outlets may be provided. In particular, these liquid outlets are preferably arranged such that the liquid can be applied as evenly as possible to the surface to be cleaned within the area bounded by the cleaning surface.

[0009] Advantageously, two or more liquid outlets have liquid outlet cross sections of the same or different sizes. Thus, the amount of cleaning liquid to be applied to the surface to be cleaned can be optimally adapted, in particular depending on the shape of the cleaning surface.

[0010] According to a further preferred embodiment of the invention, in particular also in the case of a hard surface cleaning device of the type mentioned at the outset, it can be provided that the hard surface cleaning device comprises a wiping pad carrier which defines a cleaning surface. In particular, the side surface of the wiping pad carrier can form the cleaning surface. The wiping pad carrier can be used in particular to cover a wiping pad which is replaceable and cleanable. Thus, depending on the surface to be cleaned, the optimum wiping pad can be connected to the wiping pad carrier.

[0011] Advantageously, the cleaning surface is designed flat or substantially flat, or is designed in a manner that points away from the wiping pad carrier in a convex curvature or in a concave curvature. In particular, the convexly curved surface or the concavely curved surface can be designed in the form of a section of a cylinder surface. The design of the cleaning surface can in particular enable an optimal match to the surface to be cleaned. The concave curvature can in particular enable an optimal match to the convexly curved surface to be cleaned. In particular, the wiping pad carrier can be designed to be deformable so that when the user presses the cleaning surface against the surface to be cleaned, the curvature of the cleaning surface can be matched to the curvature of the surface to be cleaned.

[0012] The hard surface cleaning device can be designed particularly simply and compactly if the at least one liquid outlet is designed integrally with the wiping pad carrier. For example, the at least one liquid outlet can be integrally formed on the wiping pad carrier in the form of a nozzle or, if the nozzle is designed as a separate component, the at least one liquid outlet can be connected to the wiping pad carrier. In particular, the wiping pad carrier can be made of plastic by injection molding.

[0013] For optimal cleaning of the surface to be cleaned, it is advantageous if the wiping pad carrier carries the wiping pad. Ideally, the wiping pad completely covers the cleaning surface defined by the wiping pad carrier. In particular, if the cleaning surface defined by the wiping pad carrier consists of a hard material, such as a thermoplastic, it is possible to avoid that the wiping pad carrier damages the surface to be cleaned. The wiping pad can also be optimally adjusted depending on the cleaning to be performed. In particular, the wiping pad can have a high suction capacity and dirt loosening capacity in order to loosen dirt on the surface to be cleaned as well as possible, in particular with the aid of a cleaning liquid.

[0014] Advantageously, the wiping pad rests or substantially rests with its back side against the cleaning surface of the wiping pad carrier, and the front side of the wiping pad defines the wiping surface. In this way, the hard surface cleaning device can rest with the wiping surface of the wiping pad against the surface to be cleaned. The wiping pad carrier, which can be designed to be particularly dimensionally stable, then supports the wiping pad, so that the wiping pad can be made of a highly flexible and optionally also elastic material. The flat contact of the wiping pad on the wiping pad carrier enables an optimal and uniform transmission of forces from the hard surface cleaning device via the wiping pad carrier and the wiping pad to the surface to be cleaned.

[0015] When the wiping surface and the cleaning surface are identical or substantially identical in design, optimally easy-to-use cleaning with the hard surface cleaning device is particularly possible. In particular, as described, in the case of a stable shape of the wiping pad carrier, the entire wiping surface can be supported by the cleaning surface so that the wiping force with the hard surface cleaning device is evenly transmitted to the surface to be cleaned.

[0016] Preferably, the wiping pad defines a closed wiping surface. In this way, the surface to be cleaned can be processed flatly with a hard surface cleaning device.

[0017] Advantageously, the wiping pad carrier has at least one liquid opening, and at least one liquid outlet is arranged or constructed in the region of at least one liquid opening or in or on at least one liquid opening, or at least one liquid outlet forms at least one liquid opening. The at least one liquid opening enables a cleaning liquid to be applied to the surface to be cleaned through the wiping pad carrier in a simple manner. If the wiping pad carrier is covered with a wiping pad, or the wiping pad carrier carries a wiping pad, the cleaning liquid can be loaded onto the surface to be cleaned through the wiping pad. Therefore, undefined and uncontrolled spraying of the cleaning liquid can be effectively avoided. In addition, in addition to the at least one liquid opening, the wiping pad carrier can be constructed in a closed manner so that the wiping pad can be optimally supported.

[0018] Advantageously, the wiping pad has at least one wiping pad liquid opening. In particular, it can be a sufficiently large indentation or recess in the wiping pad so that the cleaning liquid can be applied directly from the at least one liquid outlet to the surface to be cleaned without first contacting the wiping pad. Thus, for example, cleaning liquid can be applied to the surface to be cleaned under pressure, thereby making it easier to loosen dirt.

[0019] Advantageously, the at least one liquid opening and the at least one wiping pad liquid opening are arranged or configured to overlap at least partially, in particular completely. Thus, as already explained, the cleaning liquid can be applied from the at least one liquid opening through the wiping pad, i.e. through the at least one wiping pad liquid opening, directly onto the surface to be cleaned without first having to come into contact with the wiping pad.

[0020] When the at least one liquid opening is configured in the form of a notch in the wiping pad carrier, the at least one liquid opening can be configured in a simple manner. For example, it can be configured in the form of a hole.

[0021] According to another preferred embodiment of the present invention, it can be provided that the wiping pad is in the form of a textile pad, a brush, a sponge or in the form of polishing cotton. In principle, the wiping pad can be made of any material suitable for not damaging, especially not scratching the surface to be cleaned during cleaning. If, for example, the hard surface cleaning device is used to remove ice from an iced window, that is, to clean the ice, the wiping pad can be correspondingly configured to be used for easy ice removal. For example, it can be harder than ice, but softer than glass, so as not to scratch the glass to be cleaned (such as a car window). In the application described, a melting agent or deicing agent can be used as a cleaning liquid to melt the ice. In particular, for the deicing application described, the wiping pad can also be optionally eliminated so that the wiping pad carrier can be directly in contact with the surface to be deiced with the cleaning surface. In particular, the cleaning surface can be formed in the form of an ice scraper with one or more scraping edges. If the wiping pad particularly includes polishing cotton or is suitable for polishing the surface, the hard surface cleaning device can also be used to polish the surface.

[0022] Preferably, the wiping pad carrier is designed in the form of a plate. In principle, the wiping pad carrier can have any shape. The plate can be designed in particular to be flat. In addition, the plate can also be curved, for example in order to define a curved cleaning surface.

[0023] Advantageously, the wiping pad carrier is designed to be permeable to liquids. This makes it possible, in particular, to apply the cleaning liquid through the wiping pad carrier to the surface to be cleaned. In particular, it is thus also possible to wet the wiping pad held on the wiping pad carrier approximately from behind, so that the cleaning surface can be applied to the surface to be cleaned with the wetted wiping pad. For this purpose, the wiping pad carrier can have a plurality of indentations. In particular, the indentations can be arranged in a regular pattern. In particular, the stability of the wiping pad carrier can thus be optimized on the one hand and the liquid permeability can thus be optimized on the other hand.

[0024] Advantageously, the wiping pad is constructed in a liquid-permeable manner. This enables the wiping pad to be loaded with cleaning liquid from the rear, so that the surface to be cleaned can be moistened with the cleaning liquid by the moist or soaked wiping pad.

[0025] Advantageously, the wiping pad and the wiping pad carrier are connected to one another in a force-fitting and / or form-fitting manner, thereby enabling the wiping pad to be securely held on the wiping pad carrier.

[0026] Advantageously, the hard surface cleaning device comprises a connecting device, which is used to connect the wiping pad and the wiping pad carrier in a force-locking and / or form-locking manner in the connected position. Therefore, the wiping pad and the wiping pad carrier can be simply and reliably connected to each other and optionally can also be released from each other again.

[0027] When the connecting device is formed in the form of a tensioning connection, a clamping connection or a hook-and-loop connection, the hard surface cleaning device can be constructed in a simple manner. Therefore, for example, the wiping pad can be tensioned or clamped on the wiping pad carrier or can be connected by hook-and-loop connection in a simple manner.

[0028] According to another preferred embodiment of the present invention, it can be provided that the connecting device comprises a first connecting element and a second connecting element, which are arranged or constructed on the wiping pad carrier on the one hand and arranged or constructed on the wiping pad on the other hand, and the first and second connecting elements are in engagement in a force-locking and / or form-locking manner in the connected position and are disengaged in the separated position. Such a connecting device can realize the fixing of the wiping pad on the wiping pad carrier in a simple manner and release it again as required, for example in order to clean the wiping pad or replace it with another wiping pad. In particular, a plurality of first and second connecting elements can be provided. For example, the connecting device can include a snap, whose parts are arranged or constructed on the wiping pad on the one hand and arranged or constructed on the wiping pad carrier on the other hand and form the first and second connecting elements.

[0029] The wiping pad can be fastened to the wiping pad carrier in a particularly simple manner when the first connecting element is designed in the form of flexible barbs and when the second connecting element is designed in the form of textile loops. For example, the flexible barbs can be arranged or formed directly on the wiping pad carrier and when the wiping pad consists of a suitable textile material including textile loops, the wiping pad can be fastened directly to the wiping pad carrier.

[0030] If the first connecting element and the wiping pad carrier are formed in one piece, the hard surface cleaning device can be produced in a simple manner. For example, the flexible barbs of the hook-and-loop fastener can be directly injection-molded onto the wiping pad carrier or produced together with it from a thermoplastic material by injection molding. In particular, the assembly effort of the hard surface cleaning device can be reduced to a minimum.

[0031] Preferably, the wiping pad comprises a second connecting element. In particular, the second connecting element is formed integrally with the wiping pad. Therefore, the wiping pad can be directly connected to the wiping pad carrier without further processing.

[0032] Advantageously, the wiping pad and the wiping pad carrier are held in a connected position in a manner that cannot move or cannot move substantially. In this way, the movement of the wiping pad carrier can especially be directly transferred to the wiping pad, and therefore transferred to the face to be cleaned.

[0033] According to a further preferred embodiment of the invention, in particular in the case of a hard surface cleaning device of the type described at the outset, it can also be provided that the liquid dispensing device comprises a liquid container for containing the cleaning liquid and a liquid pump for conveying the cleaning liquid from the liquid container to at least one liquid outlet. The liquid pump can be designed in particular in the form of an electrically operated pump or also in the form of a manual liquid pump. If the at least one liquid outlet is designed in the form of a nozzle, the cleaning liquid can also be applied to the surface to be cleaned or to the back side of the wiping pad under pressure.

[0034] Advantageously, a cleaning agent and / or a thawing agent and / or a deicing agent and / or a waxing agent and / or a polishing agent are contained in a liquid container. For example, water can be used as a cleaning agent. In addition, it can also be mixed with special chemicals to generate the best cleaning agent for each application. Thawing agents or deicing agents are particularly suitable for deicing windows in winter, especially for use in hard surface cleaning devices for deicing car windows. In order to wax on the surface of, for example, car paint, the waxing agent can also be contained in a liquid container and applied to the surface to be treated with a liquid application device. In addition, in order to polish a surface, such as a car paint, a polishing agent can also be contained in a liquid container and applied to the surface to be treated with a liquid application device. This can be done in particular in combination with a wiping pad suitable for polishing the surface. For example, it can be a polishing cotton.

[0035] It can also be advantageous, in particular in the case of hard surface cleaning devices of the type mentioned at the outset, if the hard surface cleaning device comprises a housing. In particular, components of the hard surface cleaning device that must be protected from dust and liquids can be arranged in the housing, for example. In particular, these components can be electrical or electronic components, such as a motor or a control device. Furthermore, the housing can also be ergonomically shaped, in particular, in order to achieve a protective function on the one hand and also to define an area that enables convenient handling, for example by forming a handle integrated into the housing for holding the hard surface cleaning device.

[0036] Advantageously, the housing comprises a standing surface offset from the cleaning surface for standing the hard surface cleaning device upright. Such a design makes it possible in particular to stand the hard surface cleaning device upright without standing it upright on the cleaning surface or the wiping surface. Thus, in particular, it can be avoided that the hard surface cleaning device gets wet where it is standing.

[0037] Preferably, the standing surface is configured on the rear end of the hard surface cleaning device, in particular, on the rear end of the housing. Therefore, the hard surface cleaning device can be erected simply and safely.

[0038] When the standing surface extends transversely, especially vertically or substantially vertically relative to the cleaning surface, the hard surface cleaning device can be erected in a simple manner. Therefore, in particular, it is possible to avoid the cleaning surface or the wiping surface from contacting the place where the hard surface cleaning device should be erected.

[0039] Advantageously, the standing surface is significantly smaller than the cleaning surface. In particular, the standing surface can be up to 30% of the cleaning surface. Therefore, only a small space is required to erect the hard surface cleaning device.

[0040] Advantageously, in particular in the case of a hard surface cleaning device of the type described at the outset, the hard surface cleaning device has a handle for holding the hard surface cleaning device. The handle can be designed in particular for holding the hard surface cleaning device with one hand and for reliably guiding it to clean the surface to be cleaned. The handle can be designed in particular to be ergonomic so that the user can achieve a secure grip of the hard surface cleaning device. In particular, the handle can be designed in the form of a knob. The knob can in particular have a shape and size such that it can be grasped by the hand of the user. The user can use the knob to reliably grip and guide the hard surface cleaning device.

[0041] For ergonomic handling of the hard surface cleaning device, it is advantageous to arrange or construct the handle in the region of the rear half of the hard surface cleaning device. Thus, the user can best see the front region or the front half of the hard surface cleaning device when he holds the hard surface cleaning device without covering the front half with his hand.

[0042] If the housing includes a handle, the hard surface cleaning device can be designed particularly compactly. In particular, the handle can abut against a recess provided on the housing. The handle can be designed in particular in the form of a rod-shaped section of the housing.

[0043] Advantageously, the liquid container is connected to the housing in the operating position. In particular, a corresponding recess or receiving portion for the liquid container can be provided on the housing, so that the liquid container forms a part of the outer surface of the hard surface cleaning device.

[0044] In order to clean the device and optionally also to fill the liquid container, it may be advantageous that the liquid container is configured to be removable from the housing. For example, in order to clean the liquid container, it may be separated from the housing.

[0045] Preferably, the liquid container is preferably arranged in the front half of the hard surface cleaning device. Therefore, when using the hard surface cleaning device, the user can especially see the liquid level in the liquid container at any time. For this purpose, it is advantageous if the liquid container is made of a transparent or at least translucent material.

[0046] Advantageously, the liquid container has a liquid container inlet and a liquid container outlet. The liquid container inlet can in particular form a filling opening in order to fill the liquid container in a simple manner, for example with water from a tap. The liquid container outlet can in particular be connected in a fluidic manner to a liquid pump or at least one liquid outlet in order to conduct or convey the cleaning liquid from the liquid container to the at least one liquid outlet.

[0047] In order to prevent cleaning liquid from escaping from the liquid container in an undesired manner, it is advantageous if the inlet of the liquid container is closed by a closure element.

[0048] In particular, the handling of the hard surface cleaning device can be improved in a simple manner by holding the closure element on the hard surface cleaning device in a movable manner. In particular, it can be held on the hard surface cleaning device in a manner that prevents it from being lost. For example, the closure element can be arranged on the housing in a pivotable manner.

[0049] In order to be able to move the closure element in a simple manner, in particular to open the liquid container, it is advantageous if the closure element has at least one gripping region protruding from the housing or the liquid container.

[0050] In particular, when a liquid pump is provided, it is advantageous to arrange or construct a ventilation device on the liquid container. In particular, the ventilation device can be designed in the form of a ventilation valve. The ventilation device can achieve pressure compensation in particular when the liquid container is made of a non-deformable material, that is to say, is dimensionally stable or essentially dimensionally stable.

[0051] If the at least one liquid container outlet is fluidically connected to a liquid pump, cleaning liquid can be conveyed in a simple manner from the liquid container to the at least one liquid outlet.

[0052] Furthermore, it is advantageous that at least one liquid outlet is fluidically connected to a liquid pump so that cleaning liquid can be conveyed from the liquid pump to the at least one liquid outlet.

[0053] When the liquid pump is formed in the form of a diaphragm pump or a piston pump, the hard surface cleaning device can be formed particularly simply and inexpensively. In principle, other pump types can also be used, with which liquids, especially high-viscosity fluids, such as polishing agents and waxing agents, can be conveyed.

[0054] In order to prevent the cleaning liquid from accidentally overflowing from the at least one liquid outlet, it is advantageous to arrange or construct a non-return valve between the liquid pump and the at least one liquid outlet. This design is particularly advantageous when the liquid pump is constructed in the form of a diaphragm pump.

[0055] Advantageously, the liquid container outlet is movably arranged or configured in the liquid container. In this way, no matter how the orientation of the hard surface cleaning device is relative to the direction of gravity, reliable discharge of cleaning liquid from the liquid container can be achieved.

[0056] Advantageously, the liquid container outlet is arranged or constructed on the free end of the liquid line extending into the liquid container. For example, the liquid line can be constructed in the form of a hose. The liquid line can be particularly constructed to be movable and deformable.

[0057] Cleaning liquid can be discharged from the liquid container in a particularly reliable manner if a sinking weight is arranged or configured at the outlet of the liquid container. In particular, the sinking weight can be arranged at the end of a liquid line in the form of a hose that projects into the liquid container. The floating weight can in particular ensure that, regardless of the orientation of the hard surface cleaning device relative to the direction of gravity, the outlet of the liquid container is always arranged in the lowest region of the liquid container relative to the direction of gravity. As a result, cleaning liquid can be discharged from the liquid container regardless of the orientation of the hard surface cleaning device relative to the direction of gravity.

[0058] Furthermore, it can be advantageous if the hard surface cleaning device comprises a movement device for moving the wiping pad carrier and the handle relative to one another. In particular, the movement device can also be designed to move the wiping pad carrier relative to the housing. Such a movement device can in particular enable a user to hold the hard surface cleaning device by the handle or the housing and to move the wiping pad carrier, in particular automatically, for example in a translational movement to and fro in a plane defined by the wiping pad carrier or the cleaning surface, or also in a rotational movement.

[0059] Preferably, the movement device preferably comprises a drive device. With this drive device, the wiping pad carrier can be moved automatically, in particular relative to the handle or relative to the housing.

[0060] Advantageously, the drive device is designed to generate a translational and / or rotational movement of the wiping pad carrier relative to the handle or the housing. In this way, the movement device makes it possible to automatically move the wiping pad carrier relative to the surface to be cleaned, in order to not only loosen dirt firmly adhering to the surface to be cleaned, but also to mechanically remove it from the surface to be cleaned.

[0061] In order to efficiently remove dirt from the surface to be cleaned, it is advantageous if the drive device is designed to generate a movement path in the range of about 0.05 mm to about 10 mm in at least one direction. In particular, a movement path can be generated in the range of about 0.05 mm to about 2 mm. Thus, the surface to be cleaned can be processed mechanically with the hard surface cleaning device in a very efficient and labor-saving manner for the user.

[0062] If the drive is designed as a mechanical, electromechanical, electromagnetic and / or piezoelectric drive, the hard surface cleaning device can be designed in a simple and inexpensive manner. In particular, the electric drive enables the hard surface cleaning device to be operated independently of the power supply.

[0063] The wiping pad carrier can be set into vibration in a simple manner if the drive is designed in the form of an unbalanced motor, an eccentric drive or an oscillating circuit.

[0064] If the drive is arranged or constructed on the wiping pad carrier, the wiping pad carrier can be set to vibrate particularly efficiently. If the drive vibrates, the wiping pad carrier also vibrates.

[0065] In order to make the hard surface cleaning device gentle to the user, it is advantageous to arrange or design the wiping pad carrier and the handle so as to be vibration-decoupled relative to one another. This can be achieved in particular in that the wiping pad carrier, which is moved back and forth relative to the handle or is subjected to vibrations, does not transmit vibrations to the handle or transmits them only to a limited extent. In particular, this allows the user to hold the hard surface cleaning device securely without his hand being subjected to vibrations.

[0066] Advantageously, the wiping pad carrier and the handle are coupled to each other via at least one damping element. The at least one damping element serves to decouple the wiping pad carrier and the handle from each other so that no or minimal vibrations are transmitted from the wiping pad carrier to the handle.

[0067] In particular, a rubber stopper can be used as the damping element, which has sufficient elasticity to be securely held at one end and to enable a relative movement with respect to the other end at the other end. Alternatively, at least one damping element can also be designed in the form of a resilient element, for example in the form of a tension spring or a compression spring. The shape of the damping element can in principle be of any design.

[0068] In order to be able to decouple the wiping pad carrier and the handle from one another as efficiently as possible, it is particularly advantageous if the hard surface cleaning device comprises four damping elements. However, two, three, five or more damping elements may also be provided.

[0069] In order to make the hard surface cleaning device easy to assemble, it is particularly advantageous that at least one damping element is connected to the wiping pad carrier and / or the handle or the housing in a force-locking and / or form-locking manner. For example, at least one damping element can be coupled to the wiping pad carrier and / or the handle or the housing in a latching manner.

[0070] When the wiping pad carrier comprises a bracket for holding the drive device, the assembly of the hard surface cleaning device can be further simplified. In particular, a bracket can be integrally formed on the wiping pad carrier, which bracket accommodates an electric motor, such as an unbalanced motor.

[0071] In order to be able to transmit the vibrations to the wiping pad carrier efficiently, it is advantageous if the drive device comprises a drive shaft and the drive shaft is oriented transversely, in particular perpendicularly, relative to the cleaning surface. In particular, an unbalanced weight is held on the drive shaft so that vibrations can be generated in a simple manner by means of the drive device, which vibrations cause the wiping pad carrier to vibrate in a plane defined by the cleaning surface.

[0072] Furthermore, it may be advantageous if the hard surface cleaning device comprises a control device for controlling the liquid pump and / or the movement device. For example, the control device enables that the liquid pump and / or the movement device can be activated and also deactivated again.

[0073] Furthermore, it can be advantageous if the control device is designed to control the rotational speed of the drive device. For example, the rotational speed of the drive device can be adjusted or set depending on the object to be cleaned. In particular, the rotational speed can be set in the range of 0 to 10,000 revolutions per minute, in particular in the range of 0 to 7,000 revolutions per minute.

[0074] According to another preferred embodiment of the present invention, the hard surface cleaning device includes a speed preset device operatively connected to the control device, which is used to preset the speed of the drive device. For example, it can be a rotary potentiometer or an input device in the form of a keyboard.

[0075] Furthermore, it is advantageous if the hard surface cleaning device comprises a moisture sensor cooperating with the control device for determining the moisture of the wiping pad. For example, the moisture of the wiping pad determined with a hygrometer can be used to control the liquid pump. If the wiping pad is sufficiently moist, the control device can, for example, automatically deactivate the liquid pump. Thus, excessive wetting of the surface to be cleaned can be avoided. This also saves cleaning liquid.

[0076] It is particularly advantageous if the moisture sensor is arranged in the wiping pad or on the wiping pad carrier. Therefore, in particular, it can be in direct contact with the wiping pad and reliably determine the moisture of the wiping pad.

[0077] Advantageously, the control device controls the liquid pump as a function of the moisture content of the wiping pad. If, for example, it is determined automatically using a moisture sensor that there is insufficient moisture in the wiping pad, the control device activates the liquid pump. If, for example, sufficient moisture is detected in the wiping pad using a moisture sensor, the control device can automatically deactivate the liquid pump in order to avoid overwetting of the wiping pad. In particular, it can thus be reliably prevented that cleaning liquid is applied excessively to the surface to be cleaned.

[0078] Advantageously, the hard surface cleaning device comprises at least one first operating element for operating the liquid pump. The at least one first operating element can in particular also be designed for deactivating the liquid pump.

[0079] Advantageously, the hard surface cleaning device comprises at least one second operating element for activating the movement device. The at least one second operating element can also optionally be configured for deactivating the movement device.

[0080] The at least one first operating element and / or the at least one second operating element are preferably connected in a controlling manner to the control device in order to send operating signals to the control device for activating and deactivating the fluid pump and / or the movement device.

[0081] Advantageously, the control device comprises a timer and, after actuation of the at least one first operating element, the control device actuates the liquid pump for a duration preset by the timer. In this way, it can be ensured, in particular, that if the user forgets to activate the liquid pump after activating it with the at least one first operating element, the application of cleaning liquid to the surface to be cleaned is automatically stopped. Alternatively, the duration can be fixedly preset or can also be set by the user using a suitable input device. For this purpose, in particular a rotary potentiometer or a keyboard input device can be provided.

[0082] Advantageously, the preset duration is in the range of about 10 s to about 90 s. Depending on the size of the surface to be cleaned, the preset duration can be set longer or shorter, or can be optionally set by the user.

[0083] For ergonomic operation of the hard surface cleaning device, it is advantageous if at least one first operating element and at least one second operating element are arranged side by side. In particular, the operating element can be arranged on the side of the handle or of the housing facing away from the cleaning surface. This allows the user, for example with the thumb of his hand holding the hard surface cleaning device, to selectively operate the operating element in order to activate and optionally also deactivate the liquid pump and the movement device again.

[0084] In order to be able to achieve optimal cleaning of different surfaces to be cleaned, it is advantageous if the wiping pad carrier is designed in a rectangular, triangular, circular or semicircular manner. The wiping pad can be matched in particular to the wiping pad carrier in terms of its shape.

[0085] It is also advantageous, especially in the case of hard surface cleaning devices of the type mentioned at the outset, if the hard surface cleaning device is designed as a handheld hard surface device. In particular, it can have a weight of less than 1000 g, so that the user can hold it comfortably with one hand and move it over or along the surface to be cleaned.

[0086] It is also advantageous, especially in the case of hard surface cleaning devices of the type mentioned at the outset, to design the hard surface cleaning device in the form of a hard surface cleaning device that can be operated independently of an electrical network. In this way, the hard surface cleaning device can be operated particularly easily, since there are no electrical network connection cables that are in the way when the hard surface cleaning device is used.

[0087] In order to be able to operate the hard surface cleaning device, in particular independently of an electrical network, it is advantageous, in particular also in the case of a hard surface cleaning device of the type mentioned in the introduction, if the hard surface cleaning device comprises an electrical energy store.

[0088] Advantageously, the electrical energy storage device is designed in the form of a battery. In particular, this can be a rechargeable battery. The rechargeable battery can be mounted in particular firmly on the hard surface cleaning device. Optionally, the rechargeable battery can also be designed to be removable from the hard surface cleaning device in order to be charged separately from the hard surface cleaning device. Thus, if at least two rechargeable batteries are available, the hard surface cleaning device can be used virtually continuously when a discharged battery is replaced by a charged battery for continued use of the hard surface cleaning device.

[0089] According to another preferred embodiment of the invention, it can be provided that the hard surface cleaning device comprises a charging connection device which is in electrical operative connection with the electrical energy store for connecting the hard surface cleaning device to a charger, in particular via a charging cable. The charging connection device in particular enables simple charging of the electrical energy store.

[0090] Furthermore, it can be advantageous, in particular also in the case of a hard surface cleaning device of the type mentioned at the outset, if the hard surface cleaning device comprises a mains connection device for connecting the hard surface cleaning device to the power grid via a mains connection cable. For example, the hard surface cleaning device can also be used when the electrical energy storage device is discharged. For example, the charging connection device can also form the mains connection device.

[0091] Furthermore, it is advantageous, especially also in the case of a hard surface cleaning device of the type mentioned at the outset, if the hard surface cleaning device comprises a mains connection cable for connecting the hard surface cleaning device to the mains. This embodiment enables in particular the continuous use of the hard surface cleaning device.

[0092] According to a further preferred embodiment of the invention, in particular also in the case of a hard surface cleaning device of the type mentioned at the outset, it can be provided that the hard surface cleaning device has an optical and / or acoustic display device for displaying the operating mode of the hard surface cleaning device and / or the charge state of the electrical energy storage device of the hard surface cleaning device. For example, the display device can display to the user optically and / or acoustically whether the liquid pump is activated and / or whether the movement device is activated. Furthermore, the charge state of the electrical energy storage device can optionally be displayed to the user optically and / or acoustically.

[0093] The hard surface cleaning device can be designed particularly simply and compactly if at least one first operating element and / or at least one second operating element comprises a display device. For example, one or more LED elements can be integrated into at least one first operating element and / or at least one second operating element in order to indicate to the user whether the liquid pump is activated or whether the movement device is activated. The charging status display can in particular be arranged or designed separately from the operating element.

[0094] If the display device is designed in the form of an LED display, the hard surface cleaning device can be designed particularly inexpensively and compactly. The LED display can in particular include at least one color-changing LED. For example, different operating modes can be displayed in different colors. In particular, the charge state of the electrical energy store can also be displayed to the user via a color code. For example, when the energy store is fully charged, the LED can emit green light, when the energy store is partially discharged, the LED can emit yellow light, and when the energy store is practically completely discharged, the LED can emit red light.

[0095] It can also be advantageous, especially in the case of hard surface cleaning devices of the type described at the outset, for the hard surface cleaning device to have a pressure sensor for measuring the pressing force applied to the cleaning surface. Such a pressure sensor makes it possible in particular to determine the pressing force applied to the cleaning surface. This is particularly advantageous when the hard surface cleaning device comprises a movement device and when the pressing force is so great that the movement device is locked due to the user pressing the hard surface cleaning device onto the surface to be cleaned. The exceeding of the boundary force can be signaled to the user, for example, optically and / or acoustically. The movement device does not require the hard surface cleaning device to apply other excessive pressing forces to the surface to be cleaned, because the wiping pad carrier moves in a defined manner relative to the surface to be cleaned in order to mechanically loosen the dirt adhering thereto.

[0096] Advantageously, the pressure sensor is electrically connected to the control device in such a way that, when the effective limit force is exceeded, the warning device outputs an optical and / or acoustic signal. In particular, the display device can include the warning device. For example, the warning device can flash in a specific color (e.g., red) and emit a signal sound when a preset pressing force is exceeded.

[0097] When the display device comprises the warning device, then the hard surface cleaning device may be particularly compact and inexpensive. BRIEF DESCRIPTION OF THE DRAWINGS

[0098] The following description of the preferred embodiments of the present invention is used for a more detailed explanation in conjunction with the accompanying drawings.

[0099] Figure 1 : A perspective view showing an embodiment of a hard surface cleaning device;

[0100] Figure 2 : Show Figure 1 A side view of a hard surface cleaning device;

[0101] Figure 3 : Show Figure 2 A view of the hard surface cleaning device viewed in the direction of arrow A;

[0102] Figure 4 : Show Figure 1An exploded perspective view of a hard surface cleaning device;

[0103] Figure 5 : Show Figure 1 Additional exploded perspective views of a hard surface cleaning apparatus;

[0104] Figure 6 : Show Figure 1 a partially cutaway exploded perspective view of a hard surface cleaning device;

[0105] Figure 7 : A partially cutaway perspective view showing a liquid container of a hard surface cleaning device;

[0106] Figure 8 :Show along Figure 3 A cross-sectional view taken along line 8-8 in FIG.

[0107] Fig. 9 :Show along Figure 3 A cross-sectional view taken along line 9-9;

[0108] Fig.10 : Show Figure 1 A top view of a wiping pad carrier of a hard surface cleaning device viewed in the direction of arrow A;

[0109] Fig.11 :Show along Fig.10 A cross-sectional view taken along line 11-11 in FIG.

[0110] Fig.12 :Show along Fig.10 A cross-sectional view taken along line 12-12 in FIG.

[0111] Fig.13 : Show Figure 1 a schematic diagram of the electrical circuitry of the hard surface cleaning equipment; and

[0112] Fig.14 : A schematic cross-sectional view showing a part of a connecting device for connecting a wiping pad carrier and a wiping pad. DETAILED DESCRIPTION

[0113] Figure 1 2 shows, by way of example, a hard surface cleaning device in the form of a window or glass cleaning device 12 , generally designated by the reference numeral.

[0114] The hard surface cleaning device 10 comprises a wiping pad carrier 14 on which a wiping pad 16 is held. Furthermore, the hard surface cleaning device 10 comprises a liquid application device 18 for applying a liquid, in particular a cleaning liquid, a defrosting liquid or a de-icing liquid, to a surface 20 to be cleaned.

[0115] Furthermore, the hard surface cleaning device 10 comprises a housing 22 which comprises an integrated handle 24 which is formed on the side of the housing 22 facing away from the wiping pad carrier 14 at a recess 26 which is surrounded on all sides.

[0116] The handle 24 is configured in the rear half 28 of the hard surface cleaning device 10 .

[0117] In the front half 30 of the hard surface cleaning device 10 , a container receptacle 32 is formed on the housing 22 , into which container receptacle 34 a liquid container is inserted.

[0118] The hard surface cleaning device 10 further comprises a movement device 36 for moving the wiping pad carrier 14 and the handle 24 or the housing 22 relative to one another.

[0119] The various components of the hard surface cleaning apparatus 10 are described in detail below.

[0120] The wiping pad carrier 14 is designed essentially in the form of a flat bowl having a rectangular bottom 38 which defines a cleaning surface 40 on which the wiping pad 16 is held.

[0121] A sleeve-like support 44 is formed on the rear side 42 of the bottom 38 or on the inner side of the bowl. It serves to accommodate a drive 46 included in the movement device 36 .

[0122] The drive device 46 is designed to generate a movement of the wiping pad carrier 14 relative to the handle 24 or relative to the housing 22 .

[0123] The drive device 46 comprises an electromagnetic drive 48 in the form of an electric motor 50 which is designed as an unbalanced motor 52 .

[0124] The drive shaft 54 ​​defines a longitudinal axis 56 which is oriented transversely, ie, perpendicularly, to the cleaning surface 40 .

[0125] An unbalanced mass 58 is arranged on the drive shaft 54, so that the electric motor 50 and the support 44 on which the electric motor 50 is held are set into vibration when the unbalanced mass rotates about the longitudinal axis 56. Since the support 44 is designed integrally with the wiping pad carrier 14, the vibrating drive 46 also sets the wiping pad carrier 14 into vibration.

[0126] The movement path of the vibration generated by the drive device 46 is approximately in the range from approximately 0.05 mm to approximately 2 mm. Depending on the type of drive device selected, the movement path can also be in the range from approximately 0.05 mm to approximately 10 mm.

[0127] The wiping pad 16 is held with the wiping pad back side 60 against the cleaning surface 40 of the wiping pad carrier 14. The wiping pad front side 62 defines a wiping surface 64, which is shown as an example in FIG. Figure 2 As shown in FIG. 1 , the surface 20 to be cleaned is placed against the surface 20 to be cleaned in order to clean it.

[0128] The wiping surface 64 and the cleaning surface 40 are constructed substantially identically. In the exemplary embodiment shown in the drawings, the wiping surface 64 is slightly larger than the cleaning surface 40 and protrudes slightly beyond the cleaning surface on all sides.

[0129] In the embodiment of the hard surface cleaning device 10 shown in the figures, the wiping pad 16 defines a closed wiping surface 64 .

[0130] The wiping pad 16 is made of a liquid-permeable material. It can be a textile material at this time.

[0131] In addition, the wiping pad 16 may also be formed in the form of a brush or a sponge. Optionally, the wiping pad 16 may also be formed of polishing cotton, or may include a polishing carrier carrying the polishing cotton.

[0132] In the embodiment of the hard surface cleaning device 10 shown by way of example in the drawings, the wiping pad 16 and the wiping pad carrier 14 are connected to one another in a force-locking and / or form-locking manner. For this purpose, a connecting device 66 is provided for connecting the wiping pad 16 and the wiping pad carrier 14 in a force-locking and / or form-locking manner in the connected position, which is shown by way of example in Figure 1 and 8 Shown in.

[0133] In the exemplary embodiment shown in the figures, the connection device 66 is designed in the form of a Velcro connection 68. Alternatively, it can also be designed in the form of a tensioning connection or a clamping connection.

[0134] The connecting device 66 comprises a first connecting element 70 and a second connecting element 72 which are arranged or formed on the one hand on the wiping pad carrier 14 and on the other hand on the wiping pad 16 .

[0135] The first and second connecting elements 70 and 72 are engaged in a force-locking and / or form-locking manner in the connected position and are engaged in a force-locking and / or form-locking manner in the disconnected position. Fig.14 The left side of is disengaged as shown by way of example.

[0136] In the Velcro fastener 68 , the first connecting element 70 is designed in the form of a flexible barb 74 and the second connecting element 72 is designed in the form of a textile loop 76 .

[0137] The first connecting element 70 is formed integrally with the wiping pad carrier 14 , for example, by injection molding the wiping pad carrier and the first connecting element 70 from a thermoplastic material. The first connecting element 70 can also be injection molded onto the wiping pad carrier 14 .

[0138] The first connecting element 70 may be arranged over the entire cleaning surface 40 or only in a partial region thereof.

[0139] The wiping pad 16 comprises second connecting elements 72. These are formed integrally with the wiping pad 16, in particular when the wiping pad 16 is made of a textile material.

[0140] In the connected position, the wiping pad 16 and the wiping pad carrier 14 are held immovably or substantially immovably relative to one another.

[0141] The wiping pad carrier 14 includes a base 38 in the form of a plate 78 .

[0142] In the embodiment of the hard surface cleaning apparatus 10 shown in the figures, the liquid dispensing device 18 comprises two liquid outlets 80 .

[0143] exist Fig.11 The design of the liquid outlet 80 can be clearly seen in the enlarged partial view of b. The actual liquid outlet 80 is slightly set back from the cleaning surface 40 by a flat hollow cylindrical recess 82.

[0144] Starting from the recess 82, a blind hole 84 is formed transversely to the cleaning surface 40, which is fluidically connected via a through hole 86 of significantly smaller diameter to a connecting channel 90 bent toward the rear end 88 of the wiping pad 16. The connecting channel 90 passes through a connecting nipple 92, onto which a connecting line 94 in the form of a hose is plugged.

[0145] The liquid outlet 80 is therefore formed slightly behind a plane 96 defined by the cleaning surface 40 . The entire liquid outlet 80 with the connecting nipple 92 is formed integrally with the wiping pad carrier 14 .

[0146] One of the liquid outlets 80 is arranged on the wiping pad carrier 14 closer to the front end 98 of the wiping pad 16 than to the rear end 88. In addition, the liquid outlet 80 is also arranged closer to the front end 98 than to the longitudinal axis 56. In addition, the other liquid outlet 80 is configured closer to the bracket 44 than to the rear end 88.

[0147] The liquid outlet cross sections of the two liquid outlets 80 defined by the through holes 86 are identical. Alternatively, they can also be constructed in different sizes so that different amounts of liquid can be applied at two different locations on the wiping pad carrier 14 to wet the wiping pad 16 with cleaning liquid.

[0148] The liquid dispensing device 18 includes not only a liquid container 34 for containing a cleaning liquid, but also a liquid pump 100 for conveying the cleaning liquid from the liquid container 34 to the liquid outlet 80 .

[0149] The liquid pump 100 is constructed in the form of a diaphragm pump 102. Alternatively, it can be constructed in the form of a piston pump. In principle, other pump types can also be used, with which liquids, in particular high-viscosity fluids such as polishes and waxing agents, can be conveyed.

[0150] As exemplified in Figure 2 and 8 As shown in FIG. 1 , in the operating position, the liquid container 34 is connected to the housing 22. However, the liquid container 34 is configured so that it can be removed from the housing 22. This is for example Figure 4 and 6 It is schematically shown in FIG.

[0151] As especially in Figure 8 As can be seen particularly clearly in FIG. 1 , the liquid container 34 is arranged in the front half 30 of the hard surface cleaning device 10 .

[0152] The liquid container 34 has a liquid container inlet 104 in the form of a circular filling opening 106 and has a liquid container outlet 108 .

[0153] The liquid container outlet 108 is formed at the free end of the hose 110. The free end of the hose 110 is surrounded by a sinker weight 112, which pulls the free end 110 and thus the liquid container outlet 108 downward in the direction of gravity.

[0154] The liquid container outlet 108 is arranged in the described manner in a movably arranged manner in the liquid container 34 , more precisely at the free end of a hose 110 which forms the liquid line.

[0155] The liquid container 34 is made of a transparent or at least translucent material, so that the user can recognize the liquid level of the cleaning liquid in the liquid container 34 at any time.

[0156] The hose 110 is coupled to the pump inlet 114 of the liquid pump 100. The pump outlet 116 or the discharge side of the liquid pump 100 is connected to a distributor 118, which has two coupling nipples 120 pointing in opposite directions, which are respectively connected to the hose 94. The other end of the hose 94 is connected to the coupling nipple 92 as described above.

[0157] The non-return valve 122 is integrated into the distributor piece 118 and is therefore arranged between the liquid pump 100 and the liquid outlet 80 .

[0158] Overall, the liquid container 34 is designed to be essentially dimensionally stable.

[0159] In order to prevent a negative pressure from building up in the liquid container 34 when the cleaning liquid is conveyed to the liquid outlet 80 by means of the liquid pump 100 , a ventilation device 124 in the form of a ventilation valve 126 is also arranged on the liquid container 34 .

[0160] The liquid container inlet 104 is closed by a closure element 128 . The closure element comprises a flap 130 which is pivotably mounted on the housing 22 and a stopper 132 which engages sealingly in the filling opening 106 and is formed integrally on the flap 130 .

[0161] The free end 134 of the flap 130 pointing forward is slightly curved away from the liquid container 34 and thus forms a gripping area 136 which enables a user to easily open and close the filling opening 106 .

[0162] The closure element 128 is held on the hard surface cleaning device 10 in the manner described and also in a captive manner.

[0163] A standing surface 138 , which is offset from the cleaning surface 40 and serves to stand the hard surface cleaning device 10 , is also formed on the housing 22 at the rear end of the handle 24 .

[0164] The standing surface 138 in combination with the rear end 88 of the wiping pad 16 enables a secure upright position of the hard surface cleaning device 10. Figure 8 This is symbolically indicated by a drawn standing plane 140 which extends substantially at a right angle to the plane 96 . The standing surface 138 is therefore formed at the rear end of the hard surface cleaning device 10 and is significantly smaller than the cleaning surface 40 .

[0165] In the embodiment of the hard surface cleaning device 10 shown in the figures, the cleaning surface 40 is designed to be flat or essentially flat. Alternatively, the cleaning surface can also be designed in a manner that points convexly away from the wiping pad carrier 14, for example in the form of a section of a cylinder surface.

[0166] The recess 82 forms a liquid opening 142 on the wiping pad carrier 14. The liquid outlet 80 is arranged or configured in the region of or on this liquid opening 142. However, it can also be said that in the embodiment of the hard surface cleaning device 10 shown in the figures, the liquid outlet 80 respectively forms a liquid opening 142.

[0167] Fig.11 In a, an optional embodiment of the wiping pad 16 is schematically shown, more precisely by the wiping pad liquid opening 144 drawn with a dashed line. As shown by way of example, the wiping pad liquid opening and the liquid opening 142 can be designed in particular to overlap partially or completely. In this way, the cleaning liquid can be applied directly from the liquid outlet 80 to the surface 20 to be cleaned without first wetting the wiping pad 16.

[0168] As mentioned above, the recess 82 forms a liquid opening 142 which in practice forms a cutout 146 of the plate 78 and thus of the wiping pad carrier 14. However, in addition to the through-hole 86, this cutout is closed by a liquid outlet 80 which forms an overflow nozzle 148.

[0169] Furthermore, in the hard surface cleaning device 10, the wiping pad carrier 14 and the handle 24 or the housing 22 are arranged in a vibration-decoupled manner relative to one another. To achieve this, a plurality of damping elements 150 are arranged between the wiping pad carrier 14 and the handle 24 enclosed by the housing 22, more precisely a total of four damping elements 150, namely one damping element 150 is arranged at each corner of the wiping pad carrier 14.

[0170] The damping element 150 is connected in a force-fitting and / or form-fitting manner not only to the wiping pad support 14 but also to the handle 24 or the housing 22. For this purpose, an annular groove 152 open in the direction of the wiping pad is formed on the wiping pad carrier 14, into which an annular projection 154 of the damping element 150 in the form of a plug 156 engages.

[0171] A sleeve-shaped protrusion 160 protrudes from the housing 22 and is embedded in the recess 158 of the plug 116. Protrusions protrude from the protrusion and point away from the wiping pad 14 in the manner of barbs. The free ends of these protrusions rest on an annular gasket 164, which is embedded in a corresponding annular groove 166, which is open in the direction pointing to the wiping pad 16.

[0172] The housing 22 is mechanically coupled to the wiping pad carrier 14 only via the described connection by means of the damping element 150 .

[0173] The damping element 150 has sufficient elasticity so that vibrations transmitted from the drive device 46 to the wiping pad carrier 14 cannot be transmitted or can only be transmitted to a small extent to the housing 22 and thus to the handle 24. The vibration decoupling makes it possible for the user to hold the hard surface cleaning device 10 quietly even when the drive device 46 sets the wiping pad carrier 14 into vibration.

[0174] The hard surface cleaning device 10 further comprises a control device 168 for controlling the liquid pump 100 and the movement device 36 .

[0175] As in Figure 6 It can be clearly seen in FIG. 1 that the control device 168 is arranged in a receiving space 170 surrounded by the handle 24 , more precisely on a printed circuit board 172 held in the receiving space.

[0176] The control device 168 is connected to the liquid pump 100 in a control-active manner via a connecting line 174 . It is also connected to the drive 48 in a control-active manner via a connecting line 176 .

[0177] An electrical energy store 178 in the form of a battery 180 is also arranged in the receiving space 170 below the printed circuit board 172. The battery 180 is designed as a rechargeable battery 180.

[0178] The electrical energy store 178 makes it possible to configure the hard surface cleaning device 10 in the form of a hard surface cleaning device 10 that can be operated independently of an electrical network.

[0179] The hard surface cleaning device 10 is also constructed in the form of a handheld hard surface cleaning device 10. Preferably, the total weight of the hard surface cleaning device 10 is less than 1000 g.

[0180] In the region of standing surface 138 , a charging connection 182 is arranged which is electrically connected to control device 168 via a connecting line 184 . The control device is in turn electrically connected to battery 180 via connecting line 168 .

[0181] If the plug 188 of the charging cable 190 is inserted into the charging connection device 182 in the form of a charging socket and the charging cable 190 is connected to the charger 192, the battery 180 can be recharged as required. The charger 192 can be connected to the power grid 198, in particular a mains socket, via a connecting cable 194, which has a plug 196.

[0182] Alternatively, the charging connection device 182 can also be connected directly to the power grid 198 using a grid connection cable 200 having a plug 202 corresponding to the plug 188 and a grid connection plug 204. In this way, the hard surface cleaning device 10 can also be operated selectively on the grid. In this way, the charging connection device 182 can also optionally form a grid connection device 206.

[0183] In a further variant of the hard surface cleaning device 10 (not shown), the grid connection cable 200 can also be connected in a non-detachable manner to the hard surface cleaning device 10 for connection to the power grid 198 .

[0184] The hard surface cleaning device 10 further comprises a first operating element 208 and a second operating element 210. Both are connected in a control-active manner to the control device 168. The first operating element 208 is used to activate and deactivate the liquid pump 100. The second operating element 210 can also be designed in particular to deactivate the liquid pump 100.

[0185] The second operating element 210 serves to activate the drive 48. In order to deactivate the drive 48, the second operating element 210 must be actuated again.

[0186] The control device 168 may optionally include a timer 212, which presets the actuation time or activation duration of the liquid pump 100. In this case, the control device 168 may be configured such that the liquid pump 100 is activated due to the actuation of the first actuation element 208 and is automatically deactivated again after the duration preset by the timer 212 has expired.

[0187] Optionally, the hard surface cleaning device 10 can include a speed preset device 214. This enables the user to discretely or continuously adjust the speed of the drive 48. For example, the speed preset device 214 can be designed in the form of a rotary potentiometer or a keyboard. In this case, the control device 168 can also include a speed control unit 216, which is in operative connection with the speed preset device 214 in a controlling manner.

[0188] The timer 212 can in particular be preset for a duration in the range of approximately 10 s to approximately 90 s. Optionally, a time preset device can also be provided so that the duration can be preset by the user himself.

[0189] The operating elements 208 and 210 are arranged next to each other on the housing 22 in the extension of the handle 24 directly above the carrier 44. The buttons 218 and 220 which are included in the operating elements 208 and 210 are arranged on the printed circuit board 172.

[0190] Optionally, the hard surface cleaning apparatus 210 may also include a moisture sensor 222 that cooperates with the control device 168 to determine the moisture of the scouring pad 16 .

[0191] The moisture sensor 222 may be selectively disposed on the wiping pad 16 or on the wiping pad carrier 14 .

[0192] If a humidity sensor 222 is provided, the control device 168 can be designed in particular such that it controls the liquid pump 100 in dependence on the humidity of the wiping pad 16 determined by the humidity sensor 222. In particular, the control device 168 can automatically deactivate the liquid pump 100 when the humidity value measured by the humidity sensor 222 exceeds a preset limit value for the humidity.

[0193] The hard surface cleaning device 10 may also optionally include an optical and / or acoustic display device 224 for displaying the operating mode of the hard surface cleaning device 10 and / or the charge state of the electrical energy store 178 .

[0194] For example, the display device 224 can be included in the operating elements 208 and 210, for example in the form of an LED 226. The LED 226 can light up in particular when the movement device 36 is activated or when the liquid pump 100 is activated.

[0195] Indicator device 224 may include, in particular, a color-changing LED in order to display the charge state of electrical energy store 178 .

[0196] Furthermore, the hard surface cleaning device can optionally have a pressure measuring sensor 228 for measuring the pressure exerted on the cleaning surface 40. The pressure measuring sensor 228 is in electrical operative connection with the control device 168 via a connecting line 230, so that when an effective limit force stored in the control device 168 is exceeded, the warning device outputs an optical and / or acoustic signal.

[0197] In order to achieve a compact design of the hard surface cleaning device 10 , the display device 224 may include a warning device.

[0198] The provision of a pressure measuring sensor makes it possible in particular for the user to press the cleaning surface 40 or wiping surface 64 of the hard surface cleaning device 10 against the surface 20 to be cleaned only with such a force that the movement device 36 can still move the wiping pad carrier 14. If the pressing force is too great, there is in principle the risk that the drive 48 will lock, so that the action produced by the movement device 36 is no longer achieved.

[0199] The hard surface cleaning device 10 described above enables the user to efficiently clean the surface 20 to be cleaned, in particular a flat hard surface, such as a window glass, in a simple manner by wetting it with a cleaning liquid, which is either applied directly to the surface 20 to be cleaned or indirectly by wetting the wiping pad 16. In particular, the possibility of moving the wiping pad carrier 14 relative to the housing 22 and the handle 24 at a high frequency facilitates the loosening of dirt from the surface to be cleaned.

[0200] Undefined spraying of cleaning liquid is avoided by the special arrangement of the liquid outlet 80. The surface to be cleaned is wetted with liquid only at the point of contact with the hard surface cleaning device 10 with the wiping pad 16. Thus, a defined and smart cleaning of the hard surface can be achieved overall.

[0201] In a second step, the surface cleaned in the above-described manner and moistened with the cleaning liquid can be sucked up with a suction device (not shown in the figure), for example a window suction device, and thus dried without streaks.

[0202] Reference numerals list

[0203] 10 Hard surface cleaning equipment

[0204] 12 Window Cleaning Equipment

[0205] 14 Wiping pad carrier

[0206] 16 Wiping pad

[0207] 18 Liquid dispensing device

[0208] 20 faces

[0209] 22 Housing

[0210] 24 Handle

[0211] 26 Gap

[0212] 28 Second half

[0213] 30 first half

[0214] 32 container storage part

[0215] 34 Liquid Container

[0216] 36 Sports equipment

[0217] 38 bottom

[0218] 40 Cleansing face

[0219] 42 dorsal

[0220] 44 Bracket

[0221] 46 Drive unit

[0222] 48 Drive

[0223] 50 Electric Motor

[0224] 52 Unbalanced Motor

[0225] 54 Drive shaft

[0226] 56 Longitudinal axis

[0227] 58 Unbalanced mass

[0228] 60 Wiping pad back

[0229] 64 Wipe surface

[0230] 66 Connecting device

[0231] 68 Velcro connection device

[0232] 70 first connecting element

[0233] 72 Second connecting element

[0234] 74 Barb

[0235] 76 Terry

[0236] 78 Board

[0237] 80 Liquid outlet

[0238] 82 recess

[0239] 84 Blind hole

[0240] 86 Through Holes

[0241] 88 end

[0242] 90 Connection channel

[0243] 92 Connecting socket

[0244] 94 Connection lines

[0245] 96 Plane

[0246] 98 Plane

[0247] 100 Liquid Pumps

[0248] 102 Diaphragm Pump

[0249] 104 Liquid container inlet

[0250] 106 Filling opening

[0251] 108 Liquid container outlet

[0252] 110 Liquid Line

[0253] 112 sinking weight

[0254] 114 Pump inlet

[0255] 116 Pump outlet

[0256] 118 accessories

[0257] 120 Connecting socket

[0258] 122 Check valve

[0259] 124 Ventilation

[0260] 126 Ventilation valve

[0261] 128 Closure element

[0262] 130 Flip

[0263] 132 Stopper

[0264] 134 end

[0265] 136 Handle area

[0266] 138 Standing surface

[0267] 140 Standing Plane

[0268] 142 Liquid opening

[0269] 144 Wiping pad liquid opening

[0270] 146 Gap

[0271] 148 Overflow Nozzle

[0272] 150 Damping element

[0273] 152 Annular groove

[0274] 154 protrusion

[0275] 156 Plug

[0276] 158 Gap

[0277] 160 protrusion

[0278] 162 Barb

[0279] 164 Ring gasket

[0280] 166 Annular groove

[0281] 168 Control Device

[0282] 170 Accommodation Space

[0283] 172 Circuit Board

[0284] 174 Connection lines

[0285] 176 Connection lines

[0286] 178 Energy Storage Device

[0287] 180 Batteries

[0288] 182 Charging connection device

[0289] 184 Connection lines

[0290] 186 Connection Line

[0291] 188 Plug

[0292] 190 Charging cable

[0293] 192 Charger

[0294] 194 Connection cable

[0295] 196 Plug

[0296] 198 Power Grid

[0297] 200 Grid connection cable

[0298] 202 Plug

[0299] 204 Grid connection plug

[0300] 206 Grid connection device

[0301] 208 first operating element

[0302] 210 Second operating element

[0303] 212 Timer

[0304] 214 Speed ​​preset device

[0305] 216 Speed ​​control element

[0306] 218 keys

[0307] 220 keys

[0308] 222 Humidity Sensor

[0309] 224 Display device

[0310] 226 LED

[0311] 228 Pressure Sensor

[0312] 230 Connection Line

Claims

1. A hard surface cleaning device (10), comprising a cleaning surface and a liquid application device (18) for applying a liquid to a surface (20) to be cleaned, wherein the cleaning surface (40) is configured to be placed against the surface (20) to be cleaned and to move on the surface to be cleaned, and the liquid application device (18) comprises at least one liquid outlet (80) for delivering a cleaning liquid to the surface (20) to be cleaned, wherein: The liquid dispensing device (18) comprises a liquid container (34) for containing a cleaning liquid and a liquid pump (100) for conveying the cleaning liquid from the liquid container (34) to the at least one liquid outlet (80), wherein the liquid container (34) comprises a liquid container inlet (104) and a liquid container outlet (108), and is characterized by having at least one of the following features: The liquid container outlet (108) is movably arranged or constructed in the liquid container (34); The liquid container outlet (108) is arranged or constructed at a free end of a liquid line (110) extending into the liquid container (34); A sinker weight (112) is arranged or constructed on the liquid container outlet (108).

2. The hard surface cleaning device according to claim 1, characterized in that The at least one liquid outlet (80) is arranged or constructed in a region bounded and surrounded by the cleaning surface (40).

3. The hard surface cleaning device according to claim 1 or 2, characterized in that: The at least one liquid outlet (80) is arranged or configured behind or in a plane (96) defined by the cleaning surface (40).

4. The hard surface cleaning device according to claim 1 or 2, characterized in that: The at least one liquid outlet (80) is arranged or configured to be closer to a front end (98) of the cleaning surface (40) than to a rear end (88) of the cleaning surface (40).

5. The hard surface cleaning device according to claim 1 or 2, characterized in that There are two or more liquid outlets (80).

6. The hard surface cleaning device according to claim 5, characterized in that The two or more liquid outlets (80) have liquid outlet cross sections of the same or different sizes.

7. The hard surface cleaning device according to claim 1 or 2, characterized in that A wiping pad carrier (14) is provided which defines the cleaning surface (40).

8. The hard surface cleaning device according to claim 7, characterized in that The cleaning surface (40) is designed to be flat or essentially flat or to be designed to point away from the wiping pad carrier (14) in a convexly curved manner or in a concavely curved manner.

9. The hard surface cleaning device according to claim 7, characterized in that The at least one liquid outlet (80) is formed integrally with the wiping pad carrier (14).

10. The hard surface cleaning device according to claim 7, characterized in that The wiping pad carrier (14) carries a wiping pad (16).

11. The hard surface cleaning device according to claim 10, characterized in that The wiping pad (16) lies or substantially lies with its wiping pad back side (60) on the cleaning surface (40) of the wiping pad carrier (14), and the wiping pad front side (62) defines a wiping surface (64).

12. The hard surface cleaning device according to claim 11, characterized in that The wiping surface (64) and the cleaning surface (40) are identical or substantially identical.

13. The hard surface cleaning device according to claim 10, characterized in that The wiping pad (16) defines a closed wiping surface (64).

14. The hard surface cleaning device according to claim 7, characterized in that The wiping pad carrier (14) has at least one liquid opening (142), and the at least one liquid outlet (80) is arranged or constructed in the area of ​​the at least one liquid opening (142) or in the at least one liquid opening (142) or on the at least one liquid opening, or the at least one liquid outlet (80) forms the at least one liquid opening (142).

15. The hard surface cleaning device according to claim 10, characterized in that The wiping pad (16) has at least one wiping pad liquid opening (144).

16. The hard surface cleaning device according to claim 15, characterized in that The at least one liquid opening (142) of the wiping pad carrier (14) and the at least one wiping liquid opening (144) are arranged or configured to at least partially overlap.

17. The hard surface cleaning device according to claim 14, characterized in that The at least one liquid opening (142) is designed in the form of a recess (146) in the wiping pad carrier (14).

18. The hard surface cleaning device according to claim 10, characterized in that The wiping pad (16) is in the form of a textile pad, a brush, a sponge or in the form of polishing cotton.

19. The hard surface cleaning device according to claim 7, characterized in that The wiping pad carrier (14) is designed in the form of a plate (78).

20. The hard surface cleaning device according to claim 7, characterized in that The wiping pad carrier (14) is designed to be liquid-permeable.

21. The hard surface cleaning device according to claim 10, characterized in that The wiping pad (16) is designed to be liquid-permeable.

22. The hard surface cleaning device according to claim 10, characterized in that The wiping pad (16) and the wiping pad carrier (14) are connected to one another in a force-fitting and / or form-fitting manner.

23. The hard surface cleaning device of claim 10, characterized in that A connecting device (66) is provided for connecting the wiping pad (16) and the wiping pad carrier (14) in a connected position in a force-fitting and / or form-fitting manner.

24. The hard surface cleaning device according to claim 23, characterized in that The connection device (66) is designed in the form of a tension connection device, a clamping connection device or a Velcro connection device (68).

25. The hard surface cleaning device of claim 23, wherein: The connecting device (66) comprises a first connecting element (70) and a second connecting element (72), which are arranged or constructed on the wiping pad carrier (14) on the one hand and on the wiping pad (16) on the other hand, and the first connecting element and the second connecting element (70, 72) are in engagement in a force-locking and / or form-locking manner in the connected position and are disengaged in the separated position.

26. A hard surface cleaning apparatus according to claim 25, characterised in that The first connecting element (70) is designed in the form of a flexible barb (74), and the second connecting element (72) is designed in the form of a textile loop (76).

27. The hard surface cleaning device of claim 25, wherein: The first connecting element (70) and the wiping pad carrier (14) are formed in one piece.

28. The hard surface cleaning apparatus of claim 25, wherein: The wiping pad (16) comprises the second connecting element (72).

29. The hard surface cleaning device of claim 23, wherein: The wiping pad (16) and the wiping pad carrier (14) are held immovably or substantially immovably relative to one another in a connected position.

30. The hard surface cleaning device according to claim 1 or 2, characterized in that The liquid container (34) contains a cleaning agent and / or a thawing agent and / or a deicing agent and / or a waxing agent and / or a polishing agent.

31. A hard surface cleaning device according to claim 1 or 2, characterized in that A housing (22) is provided.

32. A hard surface cleaning apparatus according to claim 31, characterised in that The housing (22) includes a standing surface (138) offset from the cleaning surface (40) for standing the hard surface cleaning device (10).

33. A hard surface cleaning apparatus according to claim 32, characterised in that The standing surface (138) is formed at a rear end of the hard surface cleaning device (10).

34. The hard surface cleaning apparatus of claim 32, wherein: The standing surface (138) extends transversely relative to the cleaning surface (40).

35. The hard surface cleaning apparatus of claim 32, wherein: The standing surface (138) is significantly smaller than the cleaning surface (40).

36. A hard surface cleaning device according to claim 1 or 2, characterized in that A handle (24) is provided for holding the hard surface cleaning device (10).

37. A hard surface cleaning apparatus according to claim 36, characterised in that The handle (24) is arranged or configured in the region of a rear half (28) of the hard surface cleaning device (10).

38. The hard surface cleaning apparatus of claim 36, wherein: The housing (22) of the hard surface cleaning device includes the handle (24).

39. The hard surface cleaning apparatus of claim 31, wherein: The liquid container (34) is connected to the housing (22) in an operating position.

40. The hard surface cleaning apparatus of claim 31, wherein: The liquid container (34) is configured to be removable from the housing (22).

41. A hard surface cleaning device according to claim 1 or 2, characterized in that The liquid container (34) is arranged in the front half (30) of the hard surface cleaning device (10).

42. The hard surface cleaning device according to claim 1 or 2, characterized in that The hard surface cleaning device (10) is designed in the form of a window cleaning device (12).

43. A hard surface cleaning device according to claim 1 or 2, characterized in that The liquid container inlet (104) is closed by a closing element (128).

44. A hard surface cleaning apparatus according to claim 43, characterised in that The closure element (128) is held movably on the hard surface cleaning device (10).

45. A hard surface cleaning device according to claim 1 or 2, characterized in that A ventilation device (124) is arranged or formed on the liquid container (34).

46. ​​A hard surface cleaning device according to claim 1 or 2, characterized in that The liquid container outlet (108) is fluidically connected to the liquid pump (100).

47. A hard surface cleaning device according to claim 1 or 2, characterized in that The at least one liquid outlet (80) is fluidically connected to the liquid pump (100).

48. A hard surface cleaning apparatus according to claim 1 or 2, characterized in that The liquid pump (100) is designed in the form of a diaphragm pump (102) or in the form of a piston pump.

49. A hard surface cleaning device according to claim 1 or 2, characterized in that A check valve (122) is arranged or configured between the liquid pump (100) and the at least one liquid outlet (80).

50. The hard surface cleaning apparatus of claim 8, wherein: The cleaning surface (40) is in the form of a section of a cylinder surface.

51. The hard surface cleaning apparatus of claim 16, wherein: The at least one liquid opening (142) and the at least one wiping liquid opening (144) are arranged or configured to completely overlap.

52. The hard surface cleaning apparatus of claim 28, wherein: The wiping pad (16) is formed integrally with the second connecting element (72).

53. The hard surface cleaning device according to claim 1 or 2, characterized in that The liquid container (34) is made of a translucent material.

54. The hard surface cleaning apparatus of claim 36, wherein A moving device (36) is provided for moving the wiping pad carrier (14) defining the cleaning surface (40) and the handle (24) relative to each other.

55. A hard surface cleaning apparatus according to claim 54, characterised in that The movement device (36) includes a drive device (46).

56. A hard surface cleaning apparatus according to claim 55, characterised in that The drive device (46) is designed to generate a translational movement and / or a rotational movement of the wiping pad carrier (14) relative to the handle (24).

57. The hard surface cleaning apparatus of claim 55, wherein: The drive device (46) is designed to generate a movement path in the range of 0.05 mm to 10 mm in at least one direction.

58. The hard surface cleaning apparatus of claim 55, wherein: The drive device (46) is designed as a mechanical, electromechanical, electromagnetic and / or piezoelectric drive (48).

59. A hard surface cleaning apparatus according to claim 58, characterised in that The drive (48) is designed in the form of an unbalanced motor (52), in the form of an eccentric drive or in the form of an oscillating circuit.

60. The hard surface cleaning apparatus of claim 55, wherein: The drive device (46) is arranged or constructed on the wiping pad carrier (14).

61. The hard surface cleaning apparatus of claim 36, wherein: The wiping pad carrier (14) and the handle (24) defining the cleaning surface (40) are arranged or configured to be vibrationally decoupled relative to each other.

62. The hard surface cleaning apparatus of claim 36, wherein: A wiping pad carrier (14) defining the cleaning surface (40) and the handle (24) are coupled to each other via at least one damping element (150).

63. A hard surface cleaning device according to claim 62, characterized in that There are four damping elements (150).

64. The hard surface cleaning apparatus of claim 62, wherein: The at least one damping element (150) is coupled to the wiping pad carrier (14) and / or the handle (24) or the housing (22) of the hard surface cleaning device in a force-fitting and / or form-fitting manner.

65. The hard surface cleaning apparatus of claim 55, wherein: The wiping pad carrier (14) includes a bracket (44) for holding the drive device (46).

66. The hard surface cleaning apparatus of claim 55, wherein: The drive device (46) includes a drive shaft (54), and the drive shaft (54) is oriented transversely relative to the cleaning surface (40).

67. A hard surface cleaning device according to claim 1 or 2, characterized in that A control device (168) is provided for controlling the liquid pump (100) and / or a movement device (36) for moving a wiping pad carrier (14) defining the cleaning surface (40) and a handle (24) for holding the hard surface cleaning device (10) relative to each other.

68. A hard surface cleaning apparatus according to claim 67, characterised in that The control device (168) is designed to control the rotational speed of a drive device (46) of the movement device (36).

69. A hard surface cleaning apparatus according to claim 68, characterised in that A speed presetting device (214) is operatively connected to the control device (168) and is used to preset the speed of the drive device (46).

70. The hard surface cleaning apparatus of claim 67, wherein A moisture sensor (222) is provided in cooperation with the control device (168) for determining the moisture of a wiping pad (16) carried by a wiping pad carrier (14) defining the cleaning surface (40).

71. A hard surface cleaning apparatus according to claim 70, characterised in that The moisture sensor (222) is arranged in the wiping pad (16) or on the wiping pad carrier (14).

72. The hard surface cleaning apparatus of claim 70, wherein: The control device (168) is configured to control the liquid pump (100) in dependence on the humidity of the wiping pad (16).

73. A hard surface cleaning device according to claim 1 or 2, characterized in that At least one first operating element (208) is provided, which is used to activate the liquid pump (100).

74. The hard surface cleaning apparatus of claim 54, wherein At least one second operating element (210) is provided, which is used to activate the movement device (36).

75. The hard surface cleaning apparatus of claim 67, wherein It has at least one first operating element (208), which is used to activate the liquid pump (100), wherein the control device (168) includes a timer (212), and after the at least one first operating element (208) is operated, the control device (168) drives the liquid pump (100) for a duration preset by the timer (212).

76. A hard surface cleaning apparatus according to claim 75, characterised in that The preset duration is in the range of 10s to 90s.

77. The hard surface cleaning apparatus of claim 74, wherein At least one first operating element (208) is provided, which is used to activate the liquid pump (100), wherein the at least one first operating element (208) and the at least one second operating element (210) are arranged next to each other.

78. The hard surface cleaning apparatus of claim 7, wherein: The wiping pad carrier (14) is designed in a rectangular, triangular, circular or semicircular shape.

79. The hard surface cleaning apparatus according to claim 1 or 2, characterized in that The hard surface cleaning device is designed in the form of a handheld hard surface cleaning device (10).

80. The hard surface cleaning device according to claim 1 or 2, characterized in that The hard surface cleaning device is designed as a hard surface cleaning device (10) that can be operated independently of an electrical network.

81. A hard surface cleaning device according to claim 1 or 2, characterized in that An electrical energy storage device (178) is provided.

82. The hard surface cleaning apparatus of claim 81, wherein: The electrical energy store (178) is designed in the form of a battery (180).

83. The hard surface cleaning device of claim 81, characterized in that A charging connection (182) is provided, which is in electrical operative connection with the electrical energy store (178) for connecting the hard surface cleaning device (10) to a charger (192) via a charging cable (190).

84. A hard surface cleaning device according to claim 1 or 2, characterized in that A grid connection device (206) is provided for connecting the hard surface cleaning device (10) to an electrical power grid (198) via a grid connection cable (200).

85. The hard surface cleaning device according to claim 1 or 2, characterized in that A grid connection cable (200) is provided for connecting the hard surface cleaning device (10) to a power grid (198).

86. A hard surface cleaning device according to claim 1 or 2, characterized in that An optical and / or acoustic display device (224) is provided for displaying an operating mode of the hard surface cleaning device (10) and / or a charge state of an electrical energy storage device (178) of the hard surface cleaning device (10).

87. A hard surface cleaning apparatus according to claim 86, characterised in that The hard surface cleaning device (10) has at least one first operating element (208) and / or at least one second operating element (210), wherein the at least one first operating element (208) is used to activate the liquid pump (100), and the at least one second operating element is used to activate a movement device (36), wherein the movement device (36) is used to move a wiping pad carrier (14) defining the cleaning surface (40) and a handle (24) for holding the hard surface cleaning device (10) relative to each other, wherein the at least one first operating element (208) and / or the at least one second operating element (210) include the display device (224).

88. The hard surface cleaning apparatus of claim 86, wherein: The display device (224) is constructed in the form of an LED display (226).

89. A hard surface cleaning device according to claim 1 or 2, characterized in that A pressure sensor (228) is provided for measuring the pressing force applied to the cleaning surface (40).

90. The hard surface cleaning apparatus of claim 89, wherein: The pressure sensor (228) is in electrical operative connection with the control device (168), so that when an effective limit force is exceeded, the warning device outputs an optical and / or acoustic signal.

91. A hard surface cleaning device according to claim 90, characterized in that An optical and / or acoustic display device (224) is provided, wherein the display device (224) includes the warning device.

92. The hard surface cleaning apparatus of claim 34, wherein: The standing surface (138) extends vertically or substantially vertically relative to the cleaning surface (40).

93. The hard surface cleaning apparatus of claim 44, wherein: The closure element (128) is held on the hard surface cleaning device (10) in a manner that prevents loss.

94. The hard surface cleaning apparatus of claim 45, wherein: The ventilation device (124) is a ventilation valve (126).

95. The hard surface cleaning apparatus of claim 57, wherein: The drive device (46) is designed to generate a movement path in the range of 0.05 mm to 2 mm in at least one direction.

96. The hard surface cleaning apparatus of claim 66, wherein: The drive shaft (54) is oriented perpendicularly to the cleaning surface (40).

97. The hard surface cleaning apparatus of claim 73, wherein: The at least one first operating element (208) is also used to deactivate the liquid pump (100).

98. The hard surface cleaning apparatus of claim 74, wherein: The at least one second operating element (210) is also used to deactivate the movement device (36).

99. The hard surface cleaning apparatus of claim 77, wherein: The at least one first operating element (208) and the at least one second operating element (210) are arranged next to each other on a surface of the handle (24) or of a housing (22) of the hard surface cleaning device (10) facing away from the cleaning surface (40).

100. The hard surface cleaning apparatus of claim 82, wherein: The electrical energy store (178) is designed in the form of a rechargeable battery (180).

101. The hard surface cleaning apparatus of claim 88, wherein: The LED display (226) includes at least one color-changing LED.

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