Holding device for a portable hard surface cleaning apparatus and set thereof

Abstract

In order to improve a holding device for a portable hard surface cleaning appliance, in particular in the form of a window cleaning device, which holding device comprises a holding part and an extension part, which holding part comprises a first connector for connecting the holding device to a hard surface cleaning appliance, and which extension part comprises a second connector for connecting the holding device to an extension element, in particular in the form of an extension rod or an extension tube, so that the holding device can be used as universally as possible, according to the invention the first connector comprises at least two holding elements for at least partially engaging and coupling in a force-closed manner to a housing region, in particular a handle region, of the hard surface cleaning appliance.

Description

[0001] The present invention relates to a holding device for a portable hard surface cleaning device, in particular in the form of a window cleaning device, which holding device comprises a holding part and an extension part, which holding part comprises a first connecting device for connecting the holding device to a hard surface cleaning device, and which extension part comprises a second connecting device for connecting the holding device to an extension element, in particular in the form of an extension rod or an extension tube, wherein the first connecting device comprises at least two holding elements for at least partially gripping and force-fit coupling with a housing area, namely a handle area, of the hard surface cleaning device.

[0002] Furthermore, the present invention relates to a set comprising a first portable hard surface cleaning device and a holding device that can be coupled to the first hard surface cleaning device.

[0003] A holding device and a set of the type described above are known, for example, from EP 3 021 725 B1 and EP 3 245 925 A1. In the known holding device, a receptacle corresponding to a housing area of ​​the hard surface cleaning device is formed for pre-fixing the device to the hard surface cleaning device. The housing area of ​​the hard surface cleaning device is positively engaged in this receptacle. The hard surface cleaning device is finally fastened to the holding device by means of a retaining strap or belt.

[0004] Due to the specially designed receptacle on the known holding device, coupling with different hard surface cleaning devices is not possible or only possible to a limited extent, whereby a secure hold of the hard surface cleaning device on the holding device cannot be guaranteed with the required safety if the receptacle on the holding device does not correspond to a housing area of ​​the hard surface cleaning device.

[0005] From FR 1 523 413 A a device for cleaning glazing and similar surfaces is known.

[0006] It is therefore an object of the present invention to improve a holding device and a set of the type described above in such a way that they can be used as universally as possible.

[0007] This problem is solved according to the invention in a holding device of the type described above by the fact that at least one or two of the at least two holding elements or that all holding elements are designed in the form of an elastically or substantially elastically spring-loaded clamping arm.

[0008] The proposed further development of a known holding device has the particular advantage that a positive-locking receptacle for receiving a housing section, especially a housing section comprising a base for the portable hard-surface cleaning device, as described, for example, in EP 2 890 283 B1, can be dispensed with. Fastening can be achieved, in particular, with the at least two holding elements. Specifically, the at least two holding elements can be used to pre-fix the hard-surface cleaning device to the holding device, for example, to attach an optional retaining element in the form of a retaining strap or belt, in order to secure the hard-surface cleaning device to the holding device with the greatest possible stability against rotation and tilting.The at least two retaining elements can each define a holding or clamping surface, and each of the at least two retaining elements can also define two or more holding or clamping surfaces. The greater the number of holding or clamping surfaces defined by the at least two retaining elements, the more securely the hard surface cleaning device can be attached to the holding device, preventing any unwanted relative movement between the hard surface cleaning device and the holding device. The at least partial, interlocking, and force-fit connection of the at least two retaining elements with the grip area of ​​the housing of the hard surface cleaning device allows, in particular, easy adaptation to different shapes and sizes of grip areas, so that the holding device can also be easily and securely connected to hard surface cleaning devices of different shapes.The proposed minimum of two retaining elements makes it possible, in particular, to completely eliminate the need for a positive locking mechanism to connect the hard surface cleaning device to the holding fixture. This has the particular advantage that the holding fixture can be coupled more flexibly with different hard surface cleaning devices. A special adaptation of a receptacle for a specific housing area of ​​a particular hard surface cleaning device, as known from EP 2 890 283 B1, is therefore not strictly necessary, but can be provided as an option. The described frictional connection for holding the housing area of ​​the hard surface cleaning device with the minimum of two retaining elements can be achieved, in particular, by selecting a shape for the retaining elements and / or by the material from which they are made.Optionally, it is also conceivable to provide additional pre-tensioning elements that hold the at least two retaining elements in a pre-tensioned position relative to each other and that then also provide the force required to generate the frictional connection between the at least two retaining elements and the housing area of ​​the hard surface cleaning device. According to the invention, at least one or two of the at least two retaining elements, or all retaining elements, are designed in the form of an elastically or substantially elastically spring-loaded clamping arm. Retaining elements designed in this way can deform elastically to a certain extent and thus adapt to different housing areas of different hard surface cleaning devices, so that the retaining device can be selectively connected to different hard surface cleaning devices.

[0009] Ideally, the clamping arm is made of an elastically deformable material, particularly a plastic. For example, it could be a clamping arm made of a thermoplastic material and produced by injection molding.

[0010] The holding device can be coupled or connected to a hard surface cleaning device particularly easily and securely if the at least two holding elements are arranged or designed in pairs, especially in pairs that are mirror images of each other. For example, the at least two holding elements can thus at least partially encompass a housing area on both sides and securely clamp the housing area between them. A mirror-symmetrical arrangement particularly facilitates handling and simplifies the design effort for manufacturing the holding device. In particular, even symmetrically shaped grip areas can be easily and securely held to the holding device in a force-fit manner.

[0011] It is advantageous if the free ends of paired retaining elements are designed to point away from each other and if the free ends define an insertion area between them with sliding surfaces that point towards each other or substantially towards each other for the housing section of the hard-surface cleaning device. The proposed improvement particularly enables simple, and ideally tilt-free, insertion of the housing section of the hard-surface cleaning device between the two retaining elements. Specifically, this allows the free ends of the retaining elements to be moved away from each other when the housing section is inserted between the retaining elements and, after the housing section of the hard-surface cleaning device has been fully inserted between the paired retaining elements, to spring back slightly so that they can securely hold the housing section in place.

[0012] It is advantageous if the paired retaining elements are spaced apart from one another and define a constriction or narrowing between them. In particular, the constriction or narrowing can be adjacent to the insertion area. For example, when the housing section is inserted between them, the paired retaining elements can be spread open to their maximum extent as the housing section passes through the constriction or narrowing. After passing through the constriction or narrowing, the paired retaining elements can then spring back slightly towards their initial position to at least partially enclose the housing section of the hard surface cleaning device and secure it against detachment from the holding device.

[0013] It is advantageous if the first connecting device defines a first longitudinal axis and if the constriction or narrowing defines an angle relative to the first longitudinal axis in the circumferential direction, with an angle ranging from approximately 10° to approximately 120°. In particular, the angle range can be from approximately 40° to approximately 90°. Such a constriction or narrowing allows, on the one hand, for easy insertion of the housing of the hard surface cleaning device between the at least two retaining elements and, on the other hand, ensures a secure, force-fit connection of the hard surface cleaning device to the retaining device.

[0014] Preferably, the holding device comprises two, four, or six holding elements. Providing four or six holding elements has the particular advantage that multiple contact points between the holding device and the hard surface cleaning device can be specified, in order to achieve the most secure possible hold of the hard surface cleaning device on the holding device, especially to temporarily connect it to the holding device before it can be additionally secured with the aforementioned retaining element, if desired.

[0015] According to a further preferred embodiment of the invention, the first connecting device can define a first longitudinal axis, and the at least two retaining elements can be arranged or configured to at least partially surround the first longitudinal axis. Such a configuration makes it possible, in particular, to define a receiving space or receiving area by means of the at least two retaining elements, into which the housing area of ​​the hard surface cleaning device can be received. In particular, the arrangement and configuration of the at least two retaining elements allows for a variable design of the area between them, in order to accommodate and force-fit the differently shaped housing areas of various hard surface cleaning devices.

[0016] To ensure a secure connection between the holding device and the hard surface cleaning device, and to prevent the holding device from tilting or twisting relative to the cleaning device about a tilting axis perpendicular to the first longitudinal axis, it is advantageous for the holding device to comprise two pairs of two holding elements each. These two pairs are arranged or configured axially offset from each other with respect to the first longitudinal axis. The greater the distance between the two pairs, the more reliably tilting of the holding device and the cleaning device relative to each other can be prevented. The two pairs of two holding elements can also each form two units, for example, in the form of a clamp with two clamping arms, with two holding elements arranged or configured on each clamping arm.

[0017] To allow for the most flexible adaptation of the holding device to different housing areas of various hard surface cleaning devices, it is advantageous if the two pairs of holding elements are distinguishable from each other in shape and size. In particular, they can have different distances between them.

[0018] It is advantageous if the first connecting device includes at least one contact surface for contact with a housing area of ​​the hard surface cleaning device, and if the at least two retaining elements are arranged or formed laterally on or adjacent to the at least one contact surface with respect to the first longitudinal axis in the circumferential direction. This allows the housing area of ​​the hard surface cleaning device, which is to be held securely between the at least two retaining elements, to be supported at several points, thereby minimizing the risk of relative movement between the holding device and the hard surface cleaning device.

[0019] It is advantageous if the at least two retaining elements define at least one retaining recess for the housing area, and if the retaining recess, with respect to the first longitudinal axis, defines a cross-sectional shape that deviates from a circular shape. Such a retaining recess allows, in particular, the simple and secure mounting of differently shaped housing areas of various hard surface cleaning devices.

[0020] The adaptation of the holding device to different housing areas of various hard surface cleaning devices can be further improved if the two pairs of holding elements each define a first holding receptacle and a second holding receptacle that differ in shape and / or size. This makes it possible, in particular, to engage different housing areas of the hard surface cleaning device with the two pairs of holding elements each, thus enabling a sufficiently stable, force-fit connection between the holding device and the hard surface cleaning device.

[0021] According to a further preferred embodiment of the invention, the first connecting device may comprise at least one retaining element which, in at least one retaining position, secures the housing area of ​​the hard surface cleaning device, which is received between the at least two retaining elements, in the holding receptacle and, in an insertion position, releases the holding receptacle. The at least two retaining elements can thus serve, in particular, to temporarily connect the holding device to the hard surface cleaning device in order to have one or both hands free for attaching the retaining element or for moving the retaining element from the insertion position to the at least one retaining position.Depending on the arrangement, shape, and size of the at least one retaining element, a sufficient force-fit connection between the holding device and the hard surface cleaning device can be created in conjunction with the at least two holding elements. In particular, by appropriately arranging and designing the holding elements and the at least one retaining element, tilting of the holding device relative to the hard surface cleaning device about a tilting axis that runs transversely to the first longitudinal axis can be prevented.

[0022] It is advantageous if the at least one retaining element secures the housing area of ​​the hard surface cleaning device, which is held between the at least two retaining elements, in the at least one retaining position in a first retaining position and in at least a second retaining position, and if a first cross-sectional shape and / or a first cross-sectional area of ​​a receiving area, which is defined or limited by the at least one retaining element in the first retaining position, differs from a second cross-sectional shape and / or a second cross-sectional area of ​​the receiving area, which is defined or limited by the at least one retaining element in the second retaining position. In other words, the at least one retaining element can be positioned at least partially around the housing area of ​​the hard surface cleaning device in various closing positions that define the different retaining positions.This allows different housing sections with varying cross-sectional shapes or areas, which are accommodated between the retaining elements, to be secured to the holding device using at least one retaining element. The different retaining positions enable individual adjustment of the at least one retaining element, particularly with regard to its length or free length, to the housing section of the hard surface cleaning device.

[0023] It is advantageous if the at least one retaining element has a free end, if a first locking element is arranged or formed at the free end, if at least a second locking element is formed on the retaining part, and if the first locking element and the at least one second locking element are designed correspondingly and engage in a force-fit and / or form-fit manner in the at least one retaining position. By engaging the first and a second locking element, the retaining element, which partially encompasses the housing area, can hold it force-fit to the holding device, in addition to the at least two holding elements.

[0024] Furthermore, it can be advantageous if at least two secondary locking elements are formed on the retaining part, and if the first locking element, in the first retaining position, engages with one of the at least two secondary locking elements in a force-fit and / or positive-locking manner, and if, in the second retaining position, the locking element engages with another of the at least two secondary locking elements in a force-fit and / or positive-locking manner. The at least two secondary locking elements allow the at least one retaining element with different free lengths to be secured to the retaining part, in order to securely hold housing areas with different cross-sectional shapes or areas securely to the retaining device.

[0025] To prevent, in particular, the hard surface cleaning device from tilting on the holding device in a connected position where it is held force-fit to the holding device by the at least two retaining elements and the at least one restraint element, it is advantageous if the at least one restraint element is arranged or designed axially offset with respect to the longitudinal axis between the two pairs of two retaining elements each. This prevents, in particular, the tilting described above about a tilting axis extending transversely to the first longitudinal axis between the hard surface cleaning device and the holding device.

[0026] The holding device can be designed in a simple and cost-effective manner if at least one retaining element is designed in the form of a retaining band or a strap.

[0027] Preferably, the at least one retaining element is made of an elastic and / or flexible material. In particular, it can be made of rubber. Such a retaining element adapts optimally to different shapes of housing areas of hard surface cleaning devices.

[0028] Furthermore, it can be advantageous if at least one protective element is arranged or formed on the retaining part, which is assigned to one of the at least two retaining elements. In particular, as many protective elements can be provided as correspond to the number of retaining parts. The at least one protective element can also define a limit for the maximum housing area of ​​a hard surface cleaning device that can be accommodated. Furthermore, they can also protect the at least two retaining elements from damage.

[0029] It is advantageous if the at least one protective element is spaced axially and / or radially from the holding element to which it is assigned, with respect to the first longitudinal axis, and if the radial distance of the protective element from the first longitudinal axis is greater than the distance of the assigned holding element from the first longitudinal axis. In particular, holding devices can be designed in which the at least one protective element surrounds one or more holding elements and protects them in a direction away from the longitudinal axis.

[0030] The holding device can be designed in a simple and cost-effective manner if the at least one protective element is U-shaped. In particular, the at least one protective element can be designed in the form of an annular U-shape, which can also be arranged or designed to project beyond a free end of the at least one holding element.

[0031] In a further preferred embodiment of the invention, the at least one protective element may have a free protective element end and the distance of the free protective element end from the first longitudinal axis may be greater than the distance of the free end of the associated retaining element from the first longitudinal axis. This design makes it particularly possible to protect the associated retaining element, especially its free end, from damage by means of the at least one protective element.

[0032] It is advantageous if the at least two retaining elements define clamping surfaces that point towards, or substantially towards, the first longitudinal axis, and if the clamping surfaces have a shape that deviates from a section of a hollow cylindrical surface concentric with the first longitudinal axis. In particular, they can deviate from a hollow cylindrical surface in the axial direction with respect to the first longitudinal axis. Furthermore, to enable optimal adaptation to different housing areas of various hard-surface cleaning devices, they can be curved towards the first longitudinal axis, especially concave or convex. Multiple curvatures, particularly with different radii, are also conceivable.

[0033] Preferably, the clamping surfaces are convexly curved in at least one spatial direction, and in particular in two or three, pointing towards the longitudinal axis. This allows optimal contact areas with the holding device to be defined in order to securely, and in particular exclusively, force-fit grip areas of different hard surface cleaning devices that are enclosed or formed by housing areas.

[0034] Furthermore, it is advantageous if the second connection device includes a connecting element for attaching it to a free end of the extension element. This allows the extension element, for example an extension rod or extension tube, to be easily and securely coupled to the holding device, for instance to use the hard surface cleaning device at working heights where a ladder would otherwise be necessary if the hard surface cleaning device were being held by a user.

[0035] A particularly stable connection between the holding device and the extension element can be achieved, in particular, by designing the connecting element as a receptacle for receiving the free end of the extension element. For example, an additional locking mechanism can be provided in the area of ​​the receptacle to secure the extension element to the second connecting device in a connected position.

[0036] In order to establish a rotationally stable connection between the extension element and the connecting element of the second connection device, it is advantageous if the second connection device defines a second longitudinal axis and if the connecting element, with respect to the second longitudinal axis, defines a cross-sectional shape that deviates from a circular shape. In this way, a positive-locking and, in particular, rotationally stable connection can be achieved simply through the cross-sectional shape.

[0037] According to a further preferred embodiment of the invention, it can be provided, particularly also in a holding device of the type described above, that the holding device comprises a hinge mechanism for articulately connecting the holding part and the extension part. A hinge mechanism makes it possible, in particular, to adjust or, especially, change the orientation of the holding part and the extension part as desired. Depending on the device to be connected to the holding device, the hinge mechanism can also be blocked or locked in a specific orientation of the holding part and the extension part relative to each other by means of a locking device. Optionally, it may also be advantageous not to provide such a locking device in order to clean a hard surface with the hard surface cleaning device connected to the holding device.

[0038] A particularly simple and defined relative movement between the holding part and the extension part can be achieved, for example, by designing the joint mechanism to pivot the holding part and the extension part about a pivot axis. In particular, the joint mechanism can thus form a hinge joint between the holding part and the extension part.

[0039] It is advantageous if the first connecting device defines a first longitudinal axis, if the second connecting device defines a second longitudinal axis, and if the pivot axis runs transversely, and in particular perpendicularly, to a plane containing the first longitudinal axis and / or the second longitudinal axis. In this way, an operator can easily and safely handle the holding device to move a hard surface cleaning device across a hard surface to be cleaned, even when the holding device is coupled with an extension element and the operator only holds the extension element, thereby holding and guiding the holding device and the hard surface cleaning device attached to it.

[0040] The joint element and the extension part can be pivoted relative to each other in a simple manner if the joint device comprises a first joint element which is arranged or formed on the holding part and a second joint element which is arranged or formed on the extension part, and if the first joint element and the second joint element are mounted to each other so as to pivot about the pivot axis.

[0041] The joint assembly can be easily designed, in particular by the fact that the first or the second joint element includes a pivot pin defining the pivot axis and that the other joint element has a pivot pin receptacle corresponding to the pivot pin, into which the pivot pin engages.

[0042] To prevent the retaining part and the extension part from unintentionally separating, it is advantageous if the retaining part and the extension part are held together axially with respect to the pivot axis. This particularly stabilizes the joint assembly, since preferably the first joint element and the second joint element are held together axially with respect to the pivot axis.

[0043] According to a further preferred embodiment of the invention, it can be provided, particularly in a holding device of the type described above, that the holding device comprises a locking device for locking the holding part and the extension part relative to each other in at least one locking position. Particularly when free adjustment of the hard surface cleaning device held by the holding device relative to a hard surface to be cleaned is not desired, the locking device enables the hard surface cleaning device to be guided as desired even when the operator is holding an extension element connected to the holding device in order to hold and guide the hard surface cleaning device for cleaning.Locking the holding part and the extension part relative to each other is particularly advantageous when using a window vacuum cleaner as a hard surface cleaning device, which establishes a linear contact with the hard surface to be cleaned, for example, with a squeegee blade. The locking mechanism allows the user to maintain this line contact as desired, even when they are not holding and guiding the hard surface cleaning device itself, but rather when they are holding and guiding an extension element that is coupled to the holding device, which in turn is connected to the hard surface cleaning device. For hard surface cleaning devices that should ideally have as much surface contact as possible with the surface to be cleaned, it is advantageous if the holding part and the extension part can be freely pivoted relative to each other.Optionally, a maximum swivel range can be specified by means of appropriate stops, so that swiveling is only possible within a certain angular range, for example in a range between 0° and 180° between the first longitudinal axis and the second longitudinal axis.

[0044] It is advantageous if the locking device can be moved from at least one locking position to a release position in which the retaining part and the extension part can pivot freely relative to each other about the pivot axis, and vice versa. This design of the locking device makes it possible, in particular, to release a set relative position between the retaining part and the extension part, to pivot the retaining part and the extension part relative to each other about the pivot axis, and, if necessary, to secure them against pivoting again in a different relative position, i.e., to move them to a different locking position.

[0045] To allow for individual use of the holding device, it is advantageous if the locking mechanism defines multiple locking positions for securing the holding part and the extension part in different pivot positions relative to each other. Different pivot positions can, in particular, define different angles between the first and second longitudinal axes. This allows the orientation of the hard surface cleaning device relative to an extension element to be set and locked as desired.

[0046] A simple locking mechanism can be achieved if the locking device includes a locking element movably mounted on the joint assembly. This locking element can be moved from a locked position, in which the locking device assumes at least one locking position, to an unlocked position, in which the locking device assumes the release position, and vice versa. By moving the locking element, the joint assembly can be locked, preventing the retaining part and the extension part from pivoting relative to each other. Alternatively, this locked position can be released by moving the locking element to the unlocked position, so that the locking device assumes the release position.

[0047] The holding device can be designed to be particularly compact if the locking element is mounted on the joint so that it can slide parallel to the pivot axis. In particular, the locking element can be arranged coaxially to the longitudinal axis and mounted so that it can slide relative to it.

[0048] It is advantageous if the locking element is held impervious to rotation on the first or second joint element, regardless of whether it is in the locked or unlocked position; if, in the unlocked position, it is rotatable relative to the other joint element about the pivot axis; and if, in the locked position, it is impervious to rotation relative to both the first and second joint elements. With such a locking element, the pivotability of the retaining part and the extension part relative to each other can be easily activated and deactivated.

[0049] It is advantageous if the locking device is bistable and holds the locking element in both the locked and unlocked positions without any actuating force acting on the locking element. In particular, the locking device can be designed without a return mechanism, which, in known locking devices, automatically returns the locking element either to the locked position or to the unlocked position and, if necessary, holds it pre-tensioned in one of these two positions. For example, such a bistable locking device can be achieved with a locking element that is moved in a first direction to unlock and in the opposite direction to lock.

[0050] The holding device is easy to handle if the locking element comprises a first actuating surface for applying an actuating force to move the locking element from the locked position to the unlocked position, and a second actuating surface for applying an actuating force to move the locking element from the unlocked position to the locked position, and if the first actuating surface and the second actuating surface are configured to point in opposite or substantially opposite directions. Such a locking element can, for example, be easily moved back and forth in a suitable receptacle by actuating the first actuating surface or by applying an actuating force to the second actuating surface.Without a reset mechanism, the locking element remains in its respective position unless other forces act on it, such as gravity, which could undesirably return it to the locked or unlocked position.

[0051] The holding device can be operated easily and safely if the first and second actuating surfaces run transversely, especially perpendicularly, to the pivot axis.

[0052] To achieve stable locking of the joint even when large leverage forces act upon it, it is advantageous for the locking mechanism to comprise a first locking tooth and a corresponding second locking tooth. The first locking tooth is located on the locking element, and the second locking tooth is located on the joint element relative to which the locking element can rotate about the pivot axis in the unlocked position. Furthermore, the first and second locking teeth must be engaged in the locked position and disengaged in the released position. In principle, it would also be conceivable to provide only one locking tooth and, instead of the other, only a corresponding tooth.However, several interlocking teeth can absorb greater forces or moments and are less prone to damage.

[0053] It is advantageous if the first and second locking teeth each comprise a plurality of locking teeth, and if the plurality of locking teeth are arranged or designed in a direction parallel to the pivot axis. This makes it possible, in particular, to engage or disengage the first and second locking teeth by moving the locking element parallel to the pivot axis.

[0054] The holding device can be easily designed and, in particular, assembled if the locking element is two-part and comprises two locking element parts. These can be snapped together after the first and second joint elements have been coupled.

[0055] To prevent the locking element from moving from the unlocked position to the locked position or vice versa due to gravity, it is advantageous if the holding device includes a detent mechanism for holding the locking element in both the locked and unlocked positions. For example, the locking element can abut a detent element in both the unlocked and locked positions, with the detent element having a default position in both positions.For example, the detent element of the locking device can be deflected from a home position to a deflected position when the locking element is moved from the locked position to the unlocked position or vice versa, unlike a return mechanism, such as a spring element, which can optionally be integrally formed with the detent element. It then automatically returns to its home position when the locking element assumes one of the two defined positions. This allows for the simple prevention of unwanted movement of the locking element, particularly movement caused by gravity.

[0056] Furthermore, it is advantageous, particularly with a holding device of the type described above, if the holding device is designed for detachable coupling with at least two differently shaped hard surface cleaning devices. In particular, the differently shaped hard surface cleaning devices can be different types of hard surface cleaning devices. They can also have different housing sections that can be connected using the first connecting element of the holding device, which can be flexibly adapted as described. In this way, the holding device can be combined and used with a wide variety of hard surface cleaning devices with great flexibility. In other words, the holding device, together with an extension element, can serve as a versatile extension device for one or more hard surface cleaning devices.

[0057] The problem stated at the outset is further solved according to the invention in a set of the type described above by the fact that the holding device is designed in the form of one of the holding devices described above. For example, the holding device can be connected to an extension element so that a user can hold and guide the hard surface cleaning device via the extension element.

[0058] Preferably, the set comprises at least one extension element that can be coupled to the holding device. In particular, two, three, or more extension elements may be provided, which, for example, may be of different lengths to achieve different extension lengths. Optionally, two or more extension elements may also be connected to each other to form an extension device consisting of individual extension elements. The at least one extension element may, in particular, be in the form of an extension rod or an extension tube.

[0059] To allow for variable extensions, it is advantageous if at least one extension element is designed to be telescopic.

[0060] According to a further preferred embodiment of the invention, the set may include at least one second portable hard surface cleaning device, which differs from the first hard surface cleaning device in its function and / or housing shape. The holding device can therefore be used, in particular, to connect to the first, a second, or a further portable hard surface cleaning device. Due to its design, the described holding device allows it to be connected to differently shaped housing sections of different hard surface cleaning devices.

[0061] It is advantageous if the first hard surface cleaning device and / or at least one second hard surface cleaning device are designed to remove and absorb liquid from a hard surface, especially a window pane. Such a hard surface cleaning device can then be used to remove cleaning fluid from damp-cleaned hard surfaces.

[0062] Furthermore, it is advantageous if the first hard surface cleaning device and / or at least one second hard surface cleaning device are designed as a liquid application device for applying and / or wetting a hard surface, especially a window pane, with a cleaning fluid. Such a hard surface cleaning device is particularly useful for loosening dirt on the hard surface. The applied cleaning fluid can then be removed, for example, with a hard surface cleaning device for squeegeeing and absorbing the liquid.

[0063] Furthermore, it is advantageous if the first hard surface cleaning device and / or at least one second hard surface cleaning device are designed in the form of a window cleaning device. With the holding device, especially when using an extension element, a user can then clean windows that would otherwise require a ladder if they were to hold and operate the respective hard surface cleaning device directly in their hand.

[0064] Optimal window cleaning is achieved particularly well with a set that includes a window cleaning device in the form of a window vacuum or a window humidifier. Specifically, the set can include a window vacuum and a window humidifier, as well as a mounting bracket and at least one extension piece.

[0065] Furthermore, the use of one of the holding devices described above for connecting to a handle area of ​​a hard surface cleaning device is suggested.

[0066] The handles of hard surface cleaning tools generally have a similar shape, as they are designed to be gripped by the user's hand. Accordingly, the dimensions of the handle can only be chosen to allow for a secure grip and guidance of the hard surface cleaning tool when holding it with one hand.

[0067] Furthermore, the use of one of the holding devices described above is suggested for connection exclusively to a handle area of ​​a hard surface cleaning device.

[0068] While it would theoretically be possible to connect the holding device to other parts of the hard surface cleaning device, such as housing components, connecting the holding device to the handle area of ​​a hard surface cleaning device, particularly to the first connection point of the holding element, allows for the simple and secure connection of a wide variety of hard surface cleaning devices using only a single holding device – a universal holding device.

[0069] The second connection point of the extension piece does not necessarily have to be connected to an extension element. It is also conceivable to connect the extension piece to a machine, such as a robot, using this second connection point. Alternatively, a user-specific, ergonomically designed handle could be attached to the extension piece, allowing the user to grip the hard surface cleaning device not by its standard handle, but by the handle specifically designed for the user and connected to the holding device.

[0070] The following description of preferred embodiments of the invention, in conjunction with the drawings, serves for further explanation. The drawings show: Figure 1: a schematic representation of a holding device before connection to a first hard surface cleaning device; Figure 2: a similar view Figure 1, wherein the holding device with its holding part is connected to a grip area of ​​the first hard surface cleaning device; Figure 3: a schematic representation of a second hard surface cleaning device and the holding device made of Figure 1 before joining; Figure 4: a view similar to Figure 3 , wherein the holding part of the holding device is connected to a grip area of ​​the second hard surface cleaning device; Figure 5: a perspective view of the holding device from the Figures 1 to 4 Figure 6: a view of the holding device Figure 5 in the direction of arrow A; Figure 7: a side view of the holding device made of Figure 6 in the direction of arrow B; Figure 8: a side view of the holding device made of Figure 6 in the direction of arrow C; Figure 9: a side view of the holding device made of Figure 8 in the direction of arrow D; Figure 10: a side view of the holding device made of Figure 8in the direction of arrow E; and Figure 11: an exploded view of the holding device made of Figure 5 .

[0071] A first embodiment of a holding device 10 comprises a holding part 12 and an extension part 14. The holding part 12 comprises a first connecting device 16 for connecting the holding device 10 to a first hard surface cleaning device 18.

[0072] In one embodiment, the extension part 14 comprises a second connecting device 20 for connecting the holding device 10 to an extension element 22, for example in the form of an extension rod 24 or an extension tube 26. Optionally, the extension part 14 can also be connected to a suitable connector 28 on a machine, for example on a robot.

[0073] In one embodiment, the first connecting device 16 comprises a total of four retaining elements 30 and 32. These are arranged or formed in pairs symmetrically to a mirror plane 34, which contains a first longitudinal axis 36 defined by the first connecting device 16.

[0074] The two paired retaining elements 30 and 32 form two pairs 38, 40, which are arranged or designed axially offset from each other with respect to the first longitudinal axis 36.

[0075] Instead of the four retaining elements 30 and 32, only two retaining elements 30 or 32, or in addition to the four retaining elements, two further retaining elements can be provided in one embodiment. In total, three pairs 38 and 40 of retaining elements 30, 32 can thus be formed.

[0076] The two retaining elements 30 and 32 are designed for at least partial gripping and force-fit coupling with a housing area 42. In one embodiment, the housing area 42 is a grip area 44 of the first hard surface cleaning device 18.

[0077] In one embodiment of the holding device 10, the retaining elements 30 and 32 are designed in the form of elastic or substantially elastic spring-loaded clamping arms 46 and 48 respectively.

[0078] In another embodiment, only one or two retaining elements are designed in the form of such a clamping arm.

[0079] The clamping arms 46, 48 are preferably made of an elastically deformable material. In particular, this is a plastic, for example a thermoplastic.

[0080] In one embodiment, the free ends 50, 52 of paired retaining elements 30, 32 are designed to point away from each other and define between them an insertion area 54, 56 with sliding surfaces 58, 60 pointing towards each other or substantially towards each other for the housing area 42 of the hard surface cleaning device 18.

[0081] In one embodiment, the paired retaining elements 30, 32 are spaced apart from each other or formed on the retaining part 12 and define a constriction 62, 64 between them. In one embodiment, the constriction 62, 64 borders directly on the insertion area 54, 56.

[0082] In one embodiment, the constriction or narrowing 62, 64 defines an angle 66, also referred to as the opening angle, which lies in a range of approximately 10° to approximately 120°. In the embodiment schematically depicted in the figures, the angle 66 is approximately 70°.

[0083] In order to securely clamp the grip area 44, the retaining elements 30, 32 are arranged or designed to partially surround the first longitudinal axis 36.

[0084] The two pairs 38 and 40, each with two retaining elements 30 and 32, differ from each other in terms of shape and size.

[0085] In particular, the retaining elements 30, 32 define clamping surfaces 68, 70 pointing towards or substantially towards the first longitudinal axis 36. In one embodiment, these surfaces have a shape that deviates from a section of a hollow cylindrical surface concentric with the first longitudinal axis 36. For example, the deviation can occur in the axial direction with respect to the first longitudinal axis 36.

[0086] In one embodiment, the clamping surfaces 68, 70 are convexly curved in at least one spatial direction towards the longitudinal axis 36. In the embodiments of the holding device 10 shown in the figures, the clamping surfaces 68, 70 are convexly curved both in a direction parallel to the first longitudinal axis 36 and in a direction transverse to it towards the longitudinal axis 36. This allows, in particular, defined, point-like or line-like contact areas on the grip area 44, regardless of its specific shape.

[0087] In one embodiment of the holding device 10, the second connecting device 20 comprises a connecting element 72 for connecting, in particular, to a free end of the extension element 22.

[0088] In one embodiment, the connecting element 72 is designed in the form of a connecting receptacle 74 for receiving the free end of the extension element 22.

[0089] The second connecting element 20 defines a second longitudinal axis 76. In one embodiment, the connecting element 72 defines a cross-sectional shape with respect to the second longitudinal axis 76, which deviates from a circular shape. In particular, the cross-sectional shape can be oval, triangular, square, pentagonal, or hexagonal.

[0090] In one embodiment, the first connecting device 16 has one or more contact surfaces 78 for contact with the housing area 42 of the hard surface cleaning device 18.

[0091] The two or four retaining elements 30, 32 are arranged or formed laterally on the mounting surface 78 with respect to the first longitudinal axis 36 in the circumferential direction or limit it laterally.

[0092] The two pairs 38, 40, each consisting of two retaining elements 30 and 32, define a first retaining receptacle 80 and a second retaining receptacle 82, which differ from each other in shape and / or size. The retaining receptacles 80, 82 serve to hold the housing area 42 and, in one embodiment, define a cross-sectional shape with respect to the first longitudinal axis 36 that deviates from a circular shape. In particular, the cross-sectional shape can be oval.

[0093] With the embodiments of the holding devices 10 described so far, housing areas 42 can be clamped between the holding elements 30, 32 to secure them. In other words, it is possible to clip the holding device 10 with the holding part 12 onto the handle area 44 of the hard surface cleaning device 18. Depending on the design of the holding elements 30, 32, these may already be sufficient to securely hold the hard surface cleaning device 18.

[0094] However, in order to prevent the unintentional detachment of the hard surface cleaning device 18 from the holding device 10 as reliably as possible, the first connecting device 16 in one embodiment comprises one or more retaining elements 84.

[0095] The retaining element 84 can secure the housing area 42, which is held between the retaining elements 30, 32, in the retaining receptacles 80, 82, in a first retaining position, which in the embodiment of the retaining device 10 shown schematically in the figures Figure 2 The retaining element 84 closes the retaining receptacles 80, 82 on one side and axially offset with respect to the first longitudinal axis 36 from the retaining elements 30, 32.

[0096] In one embodiment, the retaining element 84 is arranged or designed axially offset between the two pairs 38, 40 of the retaining elements 30, 32 with respect to the longitudinal axis 36.

[0097] In one embodiment, the retaining element 84 is designed in the form of a retaining strap 86 or a belt.

[0098] In one embodiment, the retaining element 84 is made of an elastic and / or flexible material. In particular, it can be made of rubber.

[0099] In one embodiment, the retaining element 84 is injection-molded in one piece with an insert 88 made of a thermoplastic elastomer. The insert 88 has two lateral coupling projections 90 that point substantially away from each other and engage in corresponding coupling receptacles 92 on the retaining part 12 when the retaining device 10 is mounted.

[0100] In one embodiment, the mounting surfaces 78 are formed on the insert 88 and point in the direction of the first longitudinal axis 36.

[0101] In one embodiment, the retaining element 84 has a free end 94, which is provided with a longitudinal opening 96 extending parallel to the first longitudinal axis 36. A pivot pin 98 is inserted into this opening, defining a pivot axis 100 and serving to support a first locking element 102.

[0102] The retaining part 12 has second locking elements 104 and 106 in the form of recesses or openings into which the free ends 108 of the first locking element 102 can engage. To connect the retaining device 10 to the hard surface cleaning device 18, the first locking elements 102 engage with the second locking elements 104.

[0103] To connect the holding device 10 to another hard-surface cleaning device 110, namely to a housing area 112 of the same, which also defines a grip area 114, the first locking element 102 and the second locking elements 106 are engaged with each other. In this position, the retaining element 84 is slightly shortened in its free length, so that the grip area 114, which is somewhat smaller in cross-section and also shaped somewhat differently compared to the grip area 44, can also be securely connected to the holding device 10.

[0104] The first locking element 102 can be pivoted about the pivot axis 100 as described and thus forms a clamping element for pre-tensioning the grip areas 44 or 114 on the first connecting device 16.

[0105] Thus, both the first cross-sectional shape and / or the first cross-sectional area of ​​a receiving area 116 differ from the cross-sectional shape and / or the cross-sectional area of ​​a receiving area 118, wherein the receiving area 116 is bounded by the retaining element 84 when the first locking element 102 engages the second locking element 104, and the second receiving area 118 is bounded by the retaining element 84 when the first locking element 102 engages the second locking elements 106. The locking elements 102 and 104 or 106 are engaged in the described retaining positions by force-locking and / or positive locking.

[0106] In another embodiment, additional second locking elements can alternatively be provided on the retaining part 12. However, it is also conceivable to provide only one locking element on the second retaining part 12, in which case preferably two or more locking elements are provided on the retaining element.

[0107] The retaining element can also have locking elements in the form of openings that are pulled over projections on the retaining part, similar to what is known in watches with silicone straps, where one part of the strap has openings and the other part of the strap has a retaining pin that extends through the openings.

[0108] In one embodiment, the retaining part 12 comprises one or more protective elements 120, 122. In one embodiment, each retaining element 30, 32 can be assigned a protective element 120, 122.

[0109] In one embodiment, the protective element 120, 122 may be made of a different material than the insert 88 or the retaining element 84.

[0110] The protective elements 120, 122 are spaced axially and radially from the retaining elements 30, 32 to which they are assigned, with respect to the first longitudinal axis 36. The radial distance of the protective element 120, 122 from the first longitudinal axis 36 is greater than the distance of the assigned retaining element 30, 32 from the first longitudinal axis 36.

[0111] In one embodiment, the protective elements 120, 122 are shaped like a stirrup.

[0112] In a further embodiment, the protective elements 120, 122 have a free protective element end 124, 126. In one embodiment, the distance of the free protective element end 124, 126 from the first longitudinal axis 36 is greater than the distance of the free ends 50, 52 of the associated retaining elements 30, 32 from the first longitudinal axis 36.

[0113] In one embodiment, the holding device 10 has a joint device 128 for connecting the holding part 12 and the extension part 14 to each other in a hinged manner.

[0114] In one embodiment, the articulated device 128 is designed to pivot the holding part 12 and the extension part 14 relative to each other about a pivot axis 130.

[0115] In one embodiment, the pivot axis 130 runs transversely, in particular perpendicularly, to a plane containing the first longitudinal axis 36 and / or the second longitudinal axis 76. In one embodiment, this plane coincides with the mirror plane 34.

[0116] The joint assembly 128 comprises a first joint element 132, which is arranged or formed on the retaining part 12, and a second joint element 134, which is arranged or formed on the extension part 14.

[0117] The first joint element 132 and the second joint element 134 are pivotably mounted to each other about the pivot axis 130 and are secured to each other in the axial direction with respect to the pivot axis 130.

[0118] To form a pivot bearing, a pivot pin 136 defining the pivot axis 130 is arranged or formed on the second joint element 134. The first joint element 132 comprises a pivot pin receptacle 138 corresponding to the pivot pin 136, into which the pivot pin 136 engages.

[0119] In one embodiment, the holding device 10 comprises a locking device 140 for locking the holding part 12 and the extension part 14 relative to each other in one or more locking positions.

[0120] The locking device 140 is designed in such a way that it can be moved or transferred from one of the locking positions into a release position in which the holding part 12 and the extension part can be pivoted freely relative to each other about the pivot axis 130.

[0121] In one embodiment, the locking device 140 defines a plurality of locking positions for locking the retaining part 12 and the extension part 14 in different pivot positions relative to each other. In the different pivot positions, the longitudinal axes 36 and 76 enclose different pivot angles between themselves.

[0122] In one embodiment of the holding device 10, the function of the locking device 140 is realized by a locking element 142 movably arranged on the joint assembly 128. This locking element can be moved from a locked position, in which the locking device assumes one of its locking positions, to an unlocked position, in which the locking device 140 assumes the release position, and vice versa. For this purpose, in one embodiment, the locking element 142 is slidably mounted on the joint assembly 128 parallel to the pivot axis 130.

[0123] In one embodiment, the locking element 142 is designed in two parts and comprises two locking element parts 144 and 146.

[0124] The locking element 142 comprises a base body 148 formed on the locking element part 146, which has a cross-sectional shape that deviates from a circular shape.

[0125] The two locking element parts 144 and 146 are connected to each other in a snap-fit ​​manner. A base body 150 is formed on the locking element part 144, which is inserted into the base body 148 and held in place by a snap-fit ​​connection.

[0126] The base body 148 extends around the pivot axis 130 from a first actuating disc 152, which defines a first actuating surface 154 pointing away from the second joint element 134.

[0127] The locking element part 144 comprises a second actuating disc 156, which has a second actuating surface 158 pointing away from the first joint element 132.

[0128] The second joint element 134 has an opening for receiving the non-circular base body 150, so that the locking member 142 is only displaceable parallel to the pivot axis 130 relative to the second joint element 134, but is not rotatable about the pivot axis 130 relative to the second joint element 134, regardless of whether it is in the locking position or the unlocking position.

[0129] In one embodiment, the locking element 142 is rotatable about the pivot axis 130 relative to the first joint element 132 in the unlocked position, but not in the locked position.

[0130] The locking device 140 comprises a first locking toothing 160 and a corresponding second locking toothing 162, which is arranged or formed on the first joint element 132. The locking element 142 is rotatable about the pivot axis 130 relative to the first joint element 132 in the unlocked position.

[0131] The first locking toothing 160 and the second locking toothing 162 each have a plurality of locking teeth 164, 166 which are arranged or formed in a direction parallel to the pivot axis 130.

[0132] The first locking teeth 160 and the second locking teeth 162 engage in the locked position, i.e., they are in engagement. In the release position of the locking device 140, the locking teeth 160 and 162 are disengaged.

[0133] The stroke of the locking element 142 parallel to the pivot axis 130 is at least approximately such that, in the unlocked position, the locking teeth 160 and 162 are completely disengaged. The locking element 142, with its locking tooth 160, is displaceable, in particular, towards the second joint element 134 to such an extent that the locking teeth 160 and 162, which are arranged or formed around the pivot axis 130, can be brought into engagement with each other.

[0134] In one embodiment, the locking device 140 is bistable. This means that the locking element 142 remains in its respective position, both in the locked and unlocked positions, without any actuating force acting on it. A return mechanism for automatically moving the locking element 142, for example from the unlocked position to the locked position, is not provided.

[0135] To avoid the risk of unintentional unlocking of the locking device 140, the holding device 10 in one embodiment includes a detent device 168 for holding the locking element 142 in both the locked and unlocked positions.

[0136] In one embodiment, the locking device 168 comprises two locking elements 170 projecting from the second actuating disc 156 towards the first joint element 132, each with a locking lug 172 projecting radially from the pivot axis 130, which interacts with a corresponding locking projection on the second joint element 134.

[0137] To lock, an actuating force is applied to the first actuating surface 154 on the locking element 142. This allows the locking element 142 to be moved towards the second joint element 134 until the locking teeth 160 and 162 engage. During this movement, the detent elements 170 are deflected from their home position towards the pivot axis 130 and engage behind the detent lug on the other side.

[0138] To move the locking device 140 from the locked position to the released position, an actuating force must be applied to the second actuating surface 158 to push the locking element 142 back into the unlocked position. The second actuating disc 146 is thereby moved towards the first joint element 132 until the locking teeth 160 and 162 are completely disengaged.

[0139] During this displacement movement of the locking member 142, the detent elements 170 slide back onto the detent projections and are deflected towards the pivot axis 130. When the locking member 142 returns to the unlocked position, the detent lug 172 can engage the corresponding detent projection again, so that the respective detent element 170 can spring back radially outwards away from the pivot axis 130.

[0140] The described holding device 10 is particularly designed for detachable coupling with two or more differently shaped hard surface cleaning devices 18, 110.

[0141] In one embodiment, the first hard surface cleaning device 18 and / or the second hard surface cleaning device 110 are designed as portable, mains-independent hard surface cleaning devices 18, 110. They are battery-operated, preferably with a rechargeable battery.

[0142] In order to clean hard surfaces, for example window panes, which a user cannot reach when grasping the respective hard surface cleaning device 18, 110 with his hand at the respective handle area 44 or 114, he can optionally connect the holding device 110 to one of the two hard surface cleaning devices 18, 110 in the manner described, namely by connecting the first connecting device 16 to only one of the handle areas 44 or 114 respectively.

[0143] The grip areas 44 and 114 differ in both their cross-sectional shape and their cross-sectional size. The adaptable first connection device 16 nevertheless enables a secure and, in particular, tilt-resistant connection of the holding device 10 to both hard surface cleaning devices 18 and 110.

[0144] In order to be able to clean the window pane, which is otherwise inaccessible as described, with one of the two hard surface cleaning devices 18 or 110, the second connecting device 20 of the extension part 14 is coupled, for example, to an extension element 22. The user then grasps the extension element 22 and guides the hard surface cleaning device 18 or 110, which is held on the holding device 10, in this way.

[0145] In one embodiment, a cleaning set comprises, in particular, the hard surface cleaning device 18 or the hard surface cleaning device 110 and a holding device 10. Optionally, the cleaning set may also include an extension element 22 that can be coupled to the holding device, for example in the form of an extension rod 24 or an extension tube 26.

[0146] In one embodiment of a cleaning set, the extension element 22 can be designed to be telescopic.

[0147] The cleaning set may also include a second hard surface cleaning device 18 or 110, which differs in its function or housing shape from the other hard surface cleaning device 18, 110.

[0148] The hard surface cleaning device 18 and the hard surface cleaning device 110 can be designed in particular in the form of window cleaning devices 174 and 176 respectively.

[0149] In one embodiment, the window cleaning device 174 is designed in the form of a window vacuum cleaner 178.

[0150] In one embodiment, the hard surface cleaning device 110 is designed in the form of a window humidification device 180, which defines a particularly flat humidification surface 182 that is preferably applied flat to the surface to be cleaned.

[0151] In one embodiment, the hard surface cleaning device 110 forms a liquid application device 184 for applying and / or wetting a hard surface, for example a window pane, with a cleaning fluid.

[0152] The window vacuum cleaner 178 includes a suction nozzle 186 with a straight squeegee lip 188.

[0153] To vacuum liquid from a hard surface, the squeegee blade 188 is brought into line contact with the hard surface and pulled across it while maintaining this line contact. A suction device of the window vacuum 178 draws the liquid through a liquid inlet on the suction nozzle 186 and stores it in a dirty water tank.

[0154] Maintaining line contact is essential for the use of the window vacuum cleaner 178. When the window vacuum cleaner 178 is held on the holding device 10, the joint mechanism 128 is preferably locked for vacuuming the hard surface by moving the locking element 142 into the locking position as described.

[0155] If, however, the holding device 10 is connected to the window humidifier 180, the joint mechanism 128 is preferably unlocked in the manner described above. This allows the window humidifier 180 to lie flat against the surface to be cleaned, essentially regardless of how a user guides the holding device 10 directly or via the extension element 22.

[0156] The described holding device 10 can therefore be universally connected to two or more different hard surface cleaning devices, for example to connect them to an extension element 22 or to an adapter of a machine.

[0157] In one embodiment, the first connecting device 16 is designed to be connected exclusively to grip areas 44 or 114 of hard surface cleaning devices 18, 110. Reference symbol list

[0158] 10 Holding device 12 Holding part 14 Extension part 16 First connecting device 18 First hard surface cleaning device 20 Second connecting device 22 Extension element 24 Extension rod 26 Extension tube 28 Connector 30 Holding elements 32 Holding elements 34 Mirror plane 36 Longitudinal axis 38 Pair 40 Pair 42 Housing area 44 Grip area 46 Clamping arm 48 Clamping arm 50 Free end 52 Free end 54 Insertion area 56 Insertion area 58 Sliding surface 60 Sliding surface 62 Narrow point 64 Narrow point 66 Angle 68 Clamping surface 70 Clamping surface 72 Connecting element 74 Connection receptacle 76 Second longitudinal axis 78 Contact surface 80 First holding receptacle 82 Second holding receptacle 84 Retaining element 86 Retaining strap 88 Insert 90 Coupling projection 92 Coupling receptacle 94 Free end 96 Longitudinal opening 98 Hinge pin 100 Swivel axis 102 First locking element 104 Second locking element 106 Second locking element 108 Free end 110 Second hard surface cleaning device 112 Housing area 114 Handle area 116 Receptacle area 118 Receptacle area120 Protective element 122 Protective element 124 End of protective element 126 End of protective element 128 Joint device 130 Swivel axis 132 First joint element 134 Second joint element 136 Joint pin 138 Joint pin receptacle 140 Locking device 142 Locking link 144 Locking link part 146 Locking link part 148 Base body 150 Base body 152 First actuating disc 154 First actuating surface 156 Second actuating disc 158 Second actuating surface 160 First locking tooth 162 Second locking tooth 164 Locking tooth 166 Locking tooth 168 Detent device 170 Detent elements 172 Detent lug 174 Window cleaning device 176 Window cleaning device 178 Window vacuum cleaner 180 Window humidifier 182 Humidification area 184 Liquid application device 186 Suction nozzle 188 Squeegee

Claims

1. Holding apparatus (10) for a portable hard surface cleaning appliance (18, 110), in particular in the form of a window cleaning appliance, which holding apparatus (10) comprises a holding part (12) and an extension part (14), which holding part (12) comprises a first connecting device (16) for connecting the holding apparatus (10) to a hard surface cleaning appliance (18, 110), and which extension part (14) comprises a second connecting device (20) for connecting the holding apparatus (10) to an extension element (22), in particular in the form of an extension rod (24) or an extension tube (26), wherein the first connecting device (16) comprises at least two holding elements (30, 32) for at least partially engaging around, and force-lockingly couple with, a housing portion (42, 112), namely a handle portion (44, 114), of the hard surface cleaning appliance (18, 110), characterized in that at least one or two holding elements (30, 32) of the at least two holding elements (30, 32) or in that all of the holding elements (30, 32) are configured in the form of an elastically resilient, or substantially elastically resilient, clamping arm (46, 48).

2. Holding apparatus in accordance with claim 1, characterized in that a) the clamping arm (46, 48) is formed from an elastically deformable material, in particular from a plastics material, and / or b) the at least two holding elements (30, 32) are arranged or formed in pairs, in particular in pairs and with mirror symmetry to each other, and / or c) free ends (50, 52) of holding elements (30, 32) arranged in pairs are configured such that they point away from each other, and in that the free ends (50, 52) define between them an insertion region (54, 56) having slide surfaces (58, 60) pointing towards each other or substantially pointing towards each other, for the housing portion (42, 112) of the hard surface cleaning appliance (18, 110), in particular wherein the holding elements (30, 32) arranged in pairs are arranged or formed in spaced apart relation to one another and define between them a constriction (62, 64) or narrowing, which constriction (62, 64) or narrowing is adjacent to the insertion region (54, 56), further in particular wherein the first connecting device (16) defines a first longitudinal axis (36) and the constriction (62, 64) or narrowing defines an angle (66) in a circumferential direction relative to the first longitudinal axis (36), which angle (66) has a value in a range of approximately 10° to approximately 120°, in particular a value in a range of approximately 40° to approximately 90°.

3. Holding apparatus in accordance with any one of the preceding claims, characterized in that the holding apparatus a) comprises two, four or six holding elements (30, 32), and / or b) is configured for releasably coupling to at least two differently shaped hard surface cleaning appliances (18, 110).

4. Holding apparatus in accordance with any one of the preceding claims, characterized in that the first connecting device (16) defines a first longitudinal axis (36) and in that the at least two holding elements (30, 32) are arranged or formed in at least partially surrounding relation to the first longitudinal axis (36), in particular wherein a) the holding apparatus comprises two pairs of two holding elements (30, 32) each, which two pairs (38, 40), relative to the first longitudinal axis (36), are arranged or formed in an axially offset relation to each other, in particular wherein the two pairs (38, 34) of two holding elements (30, 32) each are configured such that they are distinguishable from each other by shape and size, and / or b) the first connecting device (16) comprises at least one first contact surface (78) for contact against a housing portion (42) of the hard surface cleaning appliance (18), and the at least two holding elements (30, 32) are arranged or formed laterally at the at least one contact surface (78) or are laterally adjacent thereto, in a circumferential direction relative to the first longitudinal axis (36).

5. Holding apparatus in accordance with any one of the preceding claims, characterized in that the at least two holding elements (30, 32) define at least one holding receptacle (80, 82) for the housing portion (42) and in that the holding receptacle (80, 82), relative to the first longitudinal axis (36), defines a cross-sectional shape which departs from that of a circular shape, in particular wherein the two pairs (38, 40) of two holding elements (30, 32) each define a first holding receptacle (80) and a second holding receptacle (82) which differ from each other in shape and / or size.

6. Holding apparatus in accordance with any one of the preceding claims, characterized in that the first connecting device (16) comprises at least one retaining element (84) which, in at least one retaining position, secures in the holding receptacle (80, 82) the housing portion (42, 112) of the hard surface cleaning appliance (18, 110) received between the at least two holding elements (30, 32) and, in an insertion position, releases the holding receptacle (80, 82), in particular wherein a) the at least one retaining element (84) in a first retaining position and in at least one second retaining position secures in the at least one holding receptacle (80, 82) the housing portion (42) of the hard surface cleaning appliance (18, 110) received between the at least two holding elements (30, 32), and a first cross-sectional shape and / or a first cross-sectional surface area of a receiving region which is defined or bounded by the at least one retaining element (84) in the first retaining position differs from a second cross-sectional shape and / or a second cross-sectional surface area of the receiving region which is defined or bounded by the at least one retaining element in the second retaining position, and / or b) the at least one retaining element (84) has a free end (94), wherein a first closure element (102) is arranged or formed at the free end (94), wherein at least one second closure element (104, 106) is formed at the holding part (12), and wherein the first closure element (102) and the at least one second closure element (104, 106) are formed in corresponding relation and, in the at least one retaining position, are in force-locking and / or form-locking engagement with one another, in particular wherein at least two second closure elements (104, 106) are formed at the holding part (12), and the first closure element (102) in the first retaining position is in force-locking and / or form-locking engagement with one of the at least two second closure elements (104), and the first closure element (102) in the second retaining position is in force-locking and / or form-locking engagement with another one of the at least two second closure elements (106), and / or c) the at least one retaining element (84) is arranged or formed in axially offset relation, relative to the longitudinal axis (36), between the two pairs (38, 40) of two holding elements (30, 32) each, and / or d) the at least one retaining element (84) is configured in the form of a retaining band (86) or a strap, and / or e) the at least one retaining element (84) is formed from an elastic and / or a flexible material, in particular from rubber.

7. Holding apparatus in accordance with any one of the preceding claims, characterized in that at least one protective element (120, 122) is arranged or formed at the holding part (12), which protective element (120, 122) is associated with one of the at least two holding elements (30, 32), in particular wherein a) the at least one protective element (120, 122) is spaced from its associated holding element (30, 32) in an axial and / or radial direction, relative to the first longitudinal axis (36), and a distance of the protective element (120, 122) from the first longitudinal axis (36) in a radial direction is greater than a distance of the associated holding element (30, 32) from the first longitudinal axis (36), and / or b) the at least one protective element (120, 122) has a bow-shaped configuration, and / or c) the at least one protective element (120, 122) has a protective element free end (124, 126) and a distance of the protective element free end (124, 126) from the first longitudinal axis (36) is greater than a distance of the free end (50, 52) of the associated holding element (30, 32).

8. Holding apparatus in accordance with any one of the preceding claims, characterized in that the at least two holding elements (30, 32) define clamping surfaces (68, 70) pointing towards, or substantially pointing towards, the first longitudinal axis (36) and in that the clamping surfaces (68, 70) have a shape that departs from that of a sector of a hollow cylindrical surface concentric with the first longitudinal axis (36), in particular in an axial direction relative to the first longitudinal axis (36), in particular wherein the clamping surfaces (68, 70) are convexly curved in at least one spatial direction pointing towards the longitudinal axis (36).

9. Holding apparatus in accordance with any one of the preceding claims, characterized in that the second connecting device (20) comprises a connecting element (72) for connecting to a free end of the extension element (22), in particular wherein a) the connecting element (72) is configured in the form of a connecting receptacle (74) for receiving the free end of the extension element (22), and / or b) the second connecting device (20) defines a second longitudinal axis (76) and the connecting element (72) defines, relative to the second longitudinal axis (76), a cross-sectional shape that departs from that of a circular shape.

10. Holding apparatus in accordance with any one of the preceding claims, characterized in that the holding apparatus (10) comprises an articulation device (128) for articulately connecting the holding part (12) and the extension part (14).

11. Holding apparatus in accordance with claim 10, characterized in that the articulation device (128) a) is configured for pivoting the holding part (12) and the extension part (14) about a pivot axis (130), in particular wherein the first connecting device (16) defines a first longitudinal axis (36), the second connecting device (20) defines a second longitudinal axis (76), and the pivot axis (130) extends transversely, in particular perpendicularly, to a plane (34) which contains the first longitudinal axis (36) and / or the second longitudinal axis (76), and / or b) comprises a first articulation element (132) which is arranged or formed at the holding part (12) and comprises a second articulation element (134) which is arranged or formed at the extension part (14), and in that the first articulation element (132) and the second articulation element (134) are supported on each other for pivotal movement about the pivot axis (130), in particular wherein b1) the first or the second articulation element (134) comprises an articulation pin (136) that defines the pivot axis (130) and the other articulation element (132) comprises an articulation pin receptacle (138) corresponding to the articulation pin (136), with which articulation pin receptacle (138) the articulation pin (136) engages, and / or b2) the holding part (12) and the extension part (14), in particular the first articulation element (132) and the second articulation element (134), are securely held to each other in an axial direction relative to the pivot axis (130).

12. Holding apparatus in accordance with any one of the preceding claims, characterized in that the holding apparatus comprises an arrest device (140) for arresting the holding part (12) and the extension part (14) relative to one another in at least one arrest position, in particular wherein the arrest device (140) a) is capable of being brought from the at least one arrest position to a release position in which the holding part (12) and the extension part (14) are freely pivotable relative to one another about the pivot axis (130), and vice versa, and / or b) defines a plurality of arrest positions for arresting the holding part (12) and the extension part (14) in different pivotal positions relative to one another, and / or c) comprises an arrest member (142) movably arranged at the articulation device (128), which arrest member (142) is capable of being brought from a locking position in which the arrest device (140) assumes the at least one arrest position, to an unlocking position in which the arrest device (140) assumes the release position, and vice versa, in particular wherein c1) the arrest member (142) is supported on the articulation device (128) for displacement parallel to the pivot axis (130), and / or c2) the arrest member (142), independently of whether it assumes the locking position or the unlocking position, is non-rotatably held to the first or second articulation element (134), wherein, when in the unlocking position, it is rotatable relative to the other articulation element (132) about the pivot axis (130) and wherein, when in the locking position, it is non-rotatable relative to the first and second articulation element (132, 134), and / or c3) the arrest device (140) has a bistable configuration and holds the arrest member (142) in both the locking position and the unlocking position with no actuation force acting on the arrest member (142), and / or c4) the arrest member (142) comprises a first actuation surface (154) for introducing an actuation force for transferring the arrest member (142) from the unlocking position to the locking position and a second actuation surface (158) for introducing an actuation force for transferring the arrest member (142) from the locking position to the unlocking position, and the first actuation surface (154) and the second actuation surface (158) are configured such that they point in opposite, or substantially opposite, directions, in particular wherein the first and second actuation surfaces (154, 158) extend transversely, in particular perpendicularly, to the pivot axis (130), and / or c5) the arrest device (140) comprises a first arrest toothing (160) and a corresponding second arrest toothing (162), wherein the first arrest toothing (160) is arranged or formed at the arrest member (142), and wherein the second arrest toothing (162) is arranged or formed at the articulation element (132) relative to which the arrest member (142) is rotatable about the pivot axis (130) when in the unlocking position, and wherein the first arrest toothing (160) and the second arrest toothing (162) are in engagement when in the arrest position and are out of engagement when in the release position, in particular wherein the first arrest toothing (160) and the second arrest toothing (162) each comprise a plurality of arrest teeth (164, 166) and wherein the plurality of arrest teeth (164, 166) are arranged or formed such that they point in a direction parallel to the pivot axis (130), and / or c6) the arrest member (142) is of two-part configuration and comprises two arrest member parts (144, 146), and / or c7) the holding apparatus comprises a latch device (168) for holding the arrest member (142) in the locking position and in the unlocking position.

13. Set, comprising a first portable hard surface cleaning appliance (18, 110) and a holding apparatus (10) coupleable to the first hard surface cleaning appliance (18, 110), characterized in that the holding apparatus (10) is configured in the form of a holding apparatus (10) in accordance with any one of preceding claims.

14. Set in accordance with claim 13, characterized in that the set a) comprises at least one extension element (22) coupleable to the holding apparatus (10), in particular in the form of an extension rod (24) or an extension tube (26), in particular wherein the at least one extension element (22) is of telescopable configuration, and / or b) comprises at least one second portable hard surface cleaning appliance (18, 110) which differs in its function and / or in its housing shape from the first hard surface cleaning appliance (18, 110), in particular wherein the first hard surface cleaning appliance (18) and / or the at least one second hard surface cleaning appliance (110) b1) is configured for squeegeeing and suctioning off liquid from a hard surface, in particular a window pane, and / or b2) is configured in the form of a liquid application appliance (184) for applying and / or wetting a hard surface, for example a window pane, with a cleaning liquid, and / or b3) is configured in the form of a window cleaning appliance (174, 176), in particular wherein the window cleaning appliance (174, 176) is configured in the form of a window vacuum cleaner (178) or a window wetting appliance (180).

15. Use of a holding apparatus (10) in accordance with any one of the claims 1 to 12 for connecting, in particular for exclusively connecting, to a handle portion (44, 114) of a hard surface cleaning appliance (18, 110).

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