EP3393319B1 - Suction nozzle for a hard surface cleaning device and hard surface cleaning device with a suction nozzle of this type - Google Patents

Description

The invention relates to a suction nozzle for a portable hard surface cleaning device for drawing off and sucking up liquid from a hard surface, in particular from a window pane, comprising a suction nozzle housing with a first and a second housing half-shell and with a suction opening on which at least one flexible pull-off lip is arranged and on which a suction channel connects, which extends up to a suction channel end section, wherein a vacuum source can be connected to the suction channel end section to form a suction flow and wherein a latching element is arranged on the suction channel end section.

In addition, the invention relates to a portable hard surface cleaning device with such a suction nozzle.

Such a suction nozzle and a hard surface cleaning device with such a suction nozzle are from the DE 10 2008 004 966 A1 known. With the help of such a hard surface cleaning device, a hard surface, in particular a window pane, can be cleaned. The suction nozzle has at least one flexible pull-off lip which can be moved along a hard surface to be cleaned. A suction flow can be generated by means of the vacuum source, under the effect of which liquid can be sucked off the hard surface. This allows the hard surface, in particular a window pane, to be cleaned in the manner of a manual window puller. If the pulling lip is moved along the hard surface to be cleaned, the liquid collects at the suction opening of the suction nozzle and can be sucked up from the suction opening via the suction channel. The one from the DE 10 2008 004 966 A1 Known suction nozzle has a first housing half-shell and a second housing half-shell, which are detachably connected to one another and between take up an air duct. The air duct part defines the suction channel in combination with one of the two housing shells. On the outside of one of the two housing half-shells, a locking element designed as a separate component is fixed, which is screwed to the housing half-shell. The suction channel has a suction channel end section which can be inserted into a suction channel receiving shaft of the hard surface cleaning device, and the suction nozzle can be locked by means of the locking element held on the outside of the housing half-shell.

Suction nozzles of the type mentioned are also from the WO 2015/007324 A1 and the WO 2015/007328 A1 known.

The object of the present invention is to develop a suction nozzle of the type mentioned at the outset in such a way that it can be produced more cost-effectively.

This object is achieved by a suction nozzle with the features of claim 1.

In the suction nozzle according to the invention, the latching element, which is used to lock the suction nozzle with a suction channel receiving shaft of the hard surface cleaning device, is formed by the first housing half-shell, which for this purpose comprises an elastically deformable wall section. The use of a separate locking element, which must be fixed to the first housing half-shell, can thus be dispensed with. The suction nozzle according to the invention is therefore characterized by less expensive production and less expensive assembly.

The two housing half-shells preferably form the suction channel between them. An additional air duct part, which is arranged between the housing half-shells to define the suction channel, can thus be omitted.

According to the invention, the first housing half-shell forms an injection molded part with a hard component and an elastomer component, the elastic part deformable wall section is configured by the hard component in the form of a spring tongue which, with the exception of a first end region, is surrounded by a through slot penetrating the hard component, and wherein the through slot of the hard component is covered by the elastomer component molded onto the hard component. The first housing half-shell forms a one-piece injection-molded part which is formed by a hard component and an elastomer component. The elastically deformable wall section is formed by the hard component in the form of a spring tongue. With the exception of a first end region, the spring tongue is surrounded by a through slot which penetrates the hard component, so that the spring tongue can be elastically deformed relative to the remaining region of the hard component. However, in order to ensure that liquid and suction air cannot escape from the suction channel via the through-slot, the through-slot is covered by the elastomer component molded onto the hard component. The elastomer component allows the spring tongue to be moved and contributes to the resilient restoring force of the spring tongue.

The hard component can consist, for example, of a polypropylene material or an ABS material (acrylonitrile-butadiene-styrene), in particular of a polypropylene material reinforced with talc.

The elastomer component preferably consists of a thermoplastic elastomer material.

The spring tongue advantageously has a latching projection on the outside at its free end region. Like the spring tongue, the latching projection can consist of the hard component, so that the spring tongue and the latching projection are integrally connected to one another.

In combination with the locking projection, the spring tongue preferably forms a locking hook formed from the hard component. The locking hook can when inserting the suction channel end section in a suction channel of the Immerse the hard surface cleaning device in a snap-in receptacle of the suction duct intake shaft. This ensures in a structurally simple manner that the suction nozzle does not unintentionally detach from the suction duct receiving shaft.

In an advantageous embodiment of the invention, the elastomer component is U-shaped in the area of the through slot.

The elastomer component preferably forms a film hinge in the area of the through slot. This gives the spring tongue a high degree of mobility.

A first flexible pull-off lip made of the elastomer component is preferably molded onto the first housing half-shell. In such an embodiment of the invention, the elastomer component is used both to close the through slot of the hard component surrounding the spring tongue and to form a flexible pull-off lip. This allows a further reduction in the manufacturing and assembly costs of the suction nozzle.

It is advantageous if the first housing half-shell forms side walls of the suction channel, the side walls being coated with the elastomer component. In such an embodiment of the invention, the elastomer component forms a sealing element which extends after the two housing half-shells have been installed in the area of the side walls of the suction channel and ensures that no liquid and no suction air escapes from the suction channel in the area of the side walls.

To achieve a particularly effective cleaning effect, it is advantageous if a second flexible pull-off lip is held interchangeably between the first housing half-shell and the second housing half-shell, the two housing half-shells having holding elements and a holding section of the second flexible pull-off lip is arranged between the holding elements of the two housing half-shells and in each case forms an engagement with the holding elements, at least one holding element of the first housing half-shell being arranged in the suction channel. By providing the holding elements, the second flexible pull-off lip can be reliably fixed between the two housing half-shells, the second flexible pull-off lip also being held immovably in the area of the suction channel, since the first housing half-shell also has at least one holding element in the area of the suction channel that has a holding section the second flexible pull lip is engaged.

In order to extend the life of the suction nozzle, it is advantageous if the holding section of the second flexible pull-off lip between the holding elements of the second flexible pull-off lip in a first position of use of the second flexible pull-off lip and also in a second position of use of the second flexible pull-off lip rotated through 180 ° about its central axis two housing shells can be positioned. The second flexible pull-off lip preferably has a first pull-off edge and a second pull-off edge on its end face protruding from the suction nozzle housing, and when cleaning a hard surface, depending on the position of use, it lies either with the first pull-off edge or with the second pull-off edge against the hard surface. The respective peeling edge is subject to wear. When a maximum degree of wear is reached, a reliable cleaning effect is not guaranteed in all cases. The user then has the option of removing the exchangeable second flexible pull-off lip from the suction nozzle housing, rotating the second pull-off lip by 180 ° about its central axis, which is aligned parallel to the longitudinal axis of the suction channel, and then inserting the second pull-off lip into the suction nozzle housing again. The cleaning of the hard surface can then be continued, the stripping edge which has not been used so far now being in contact with the hard surface. The provision of the holding elements ensures that the second flexible pull-off lip can be reliably fixed between the two housing half-shells in both positions of use.

The second flexible pull-off lip is preferably configured symmetrically to its central axis which is aligned parallel to a longitudinal axis of the suction channel and parallel to a pull-off edge of the second flexible pull-off lip.

To change the position of use, it is advantageous if the second pull-off lip can be pulled out of the suction nozzle housing transversely to the longitudinal axis of the suction channel, then rotated through 180 ° about its central axis and then pulled back into the suction nozzle housing transversely to the longitudinal axis of the suction channel.

It can be provided that the holding section of the second flexible pull-off lip is designed as an extension and the holding elements of the two housing half-shells have depressions into which the extension is immersed. The holding elements and the holding section thus engage in one another, so that the second flexible pull-off lip is reliably fixed to the suction opening.

The extension of the second flexible pull-off lip is advantageously designed as a straight bead that extends along the entire second pull-off lip.

The bead preferably has a circular cross-sectional area.

In an advantageous embodiment of the invention, the at least one holding element of the first housing half-shell, which is arranged in the suction channel, forms a flow guide rib. The flow guide rib serves on the one hand to fix the second flexible pull-off lip to the suction opening, and the flow guide rib also enables the suction flow to be guided.

It is advantageous if the first housing half-shell has a plurality of holding elements arranged in the suction channel in the form of flow guide ribs.

The flow guide ribs are advantageously arranged in a fan shape, so that they have an increasing inclination to the longitudinal axis of the suction channel with increasing distance from a centrally arranged longitudinal axis of the suction channel.

It is advantageous if the flow guide ribs are arranged at the same height with respect to the longitudinal axis of the suction channel.

The flow guide ribs are preferably positioned in the area of the suction opening.

In order to keep flow losses of the suction flow low, it is expedient if the flow guide ribs taper against the direction of flow of the suction flow.

The flow guide ribs can each have a recess on their upper edge facing away from the first housing half-shell, into which the holding section of the second flexible pull-off lip designed as an extension is immersed.

The depressions on the upper edge of the flow guide ribs are preferably arranged in a rear region of the flow guide ribs with respect to the flow direction, and in a section upstream of the depressions, the upper edges of the flow guide ribs advantageously form a flat contact surface for the second flexible pull-off lip.

In cross section, the flow guide ribs are expediently wedge-shaped, so that they have a lower height in an end region at the front in relation to the flow direction of the suction flow than in an end region at the rear in relation to the flow direction.

The length of the flow guide ribs is preferably selected such that the second flexible pull-off lip covers at least half of its extent is seated on the flow direction of the suction flow on the flow guide ribs.

As already mentioned, it is advantageous if the first housing half-shell has at least one holding element in the suction channel. In an advantageous embodiment of the invention, the first housing half-shell also has at least one further holding element outside the suction channel.

It can be provided, for example, that the first housing half-shell has at least two holding elements outside the suction channel, which are arranged symmetrically to a longitudinal axis of the suction channel.

The holding elements of the first housing half-shell arranged outside the suction channel are advantageously designed in the form of troughs.

It is advantageous if a channel-shaped holding element of the first housing half-shell is arranged on both sides of the suction channel and extends from a side wall of the suction channel to an outer wall of the first housing half-shell.

As mentioned at the beginning, the invention relates not only to a suction nozzle but also to a portable hard surface cleaning device with a suction nozzle of the type mentioned above. The portable hard surface cleaning device according to the invention makes it possible to draw off and suck up liquid from a hard surface, in particular from a window pane. It can be moved in the manner of a manual window puller along the hard surface to be cleaned, in particular along a window pane. It comprises a suction unit, a dirty liquid tank and a separating device for separating liquid from an absorbed liquid-air mixture, as well as a suction nozzle of the type explained above. By means of the suction unit, a suction flow can be generated in the area of the suction opening, under the effect of which a mixture of liquid and Air is sucked into the suction channel via the suction opening. Liquid can come out of the Liquid-air mixture separated and collected in the dirty liquid tank, and the suction air sucked in can be released from the suction unit to the environment.

The portable hard surface cleaning device advantageously has a suction channel receiving shaft which can be plugged in with the suction channel end section of the suction nozzle and has a further locking element which interacts with the locking element of the suction nozzle.

As already mentioned, the further latching element can, for example, form a latching receptacle, and the latching element of the suction nozzle can form a latching hook which dips into the latching receptacle with a latching projection when the suction channel end section is connected to the suction channel receiving shaft.

The portable hard surface cleaning device preferably has a separation chamber upstream of the suction unit in the flow direction, in which the separation device is arranged. On its way from the suction channel to the suction unit, the sucked-up liquid-air mixture hits the separating device in the separating chamber, where the liquid is separated. The separated liquid can flow from the separation chamber into the dirty liquid tank, which is structurally separated from the separation chamber. The liquid is therefore advantageously separated outside the dirty liquid tank.

The portable hard surface cleaning device according to the invention preferably forms a portable window cleaning device.

Figur 1:

eine perspektivische Darstellung eines Hartflächenreinigungsgeräts;

Figur 2:

eine Schnittansicht des Hartflächenreinigungsgeräts aus Figur 1;

Figur 3:

eine perspektivische Darstellung einer Saugdüse des Hartflächenreinigungsgeräts;

Figur 4:

eine perspektivische Darstellung von zwei Gehäusehalbschalen der Saugdüse aus Figur 3 mit einer an eine erste Gehäusehalbschale angeformten ersten flexiblen Abziehlippe und einer auswechselbaren zweiten flexiblen Abziehlippe;

Figur 5:

eine perspektivische Darstellung der ersten Gehäusehalbschale schräg von oben;

Figur 6:

eine perspektivische Darstellung der ersten Gehäusehalbschale schräg von unten;

Figur 7:

eine Längsschnittansicht der Saugdüse aus Figur 3.

The following description of a preferred embodiment of the invention serves in conjunction with the drawing for a more detailed explanation. Show it:

Figure 1:

a perspective view of a hard surface cleaning device;

Figure 2:

a sectional view of the hard surface cleaning device Figure 1 ;

Figure 3:

a perspective view of a suction nozzle of the hard surface cleaning device;

Figure 4:

a perspective view of two housing shells of the suction nozzle Figure 3 with a first flexible pull-off lip molded onto a first housing half-shell and an exchangeable second flexible pull-off lip;

Figure 5:

a perspective view of the first housing half-shell obliquely from above;

Figure 6:

a perspective view of the first housing half-shell obliquely from below;

Figure 7:

a longitudinal sectional view of the suction nozzle Figure 3 .

The drawing schematically shows an advantageous embodiment of a portable hard surface cleaning device according to the invention, which is denoted overall by reference number 10. With the help of the portable hard surface cleaning device 10, liquid can be drawn off and sucked up from a hard surface, in particular from a window pane. Mirror surfaces or tiled walls can also be cleaned using the portable hard surface cleaning device 10. The hard surface cleaning device 10 can be moved along the hard surface by the user in the manner of a manual window puller. The hard surface cleaning device 10 forms a portable window cleaning device.

The hard surface cleaning device 10 comprises a base part 12, in which a suction unit 14 is arranged. The suction unit 14 comprises an electric motor 16 which drives a suction turbine 18 in rotation. From the suction turbine 18 can Air is sucked in via a turbine inlet line 20, which is straight in the exemplary embodiment shown. The turbine inlet line 20 is immersed in a separation chamber 22. A separation element in the form of a baffle wall is arranged in the separation chamber 22 at a distance from the turbine inlet line 20 and covers an inlet opening 26 of the turbine inlet line 20 and is curved essentially convexly in the direction facing away from the turbine inlet line 20.

On the side of the separation chamber facing away from the turbine inlet line 20, the base part 12 forms a suction channel receiving shaft 28 which receives a suction channel end section 30 of an advantageous embodiment of a suction nozzle 32 according to the invention. The suction nozzle 32 is shown schematically in the drawing and is explained in more detail below.

The suction turbine 18 is separated from the separation chamber 22 by means of a first partition wall 34, the turbine inlet line 20 passing through the first partition wall 34. In the area of the first partition 34, the turbine inlet line 20 is surrounded by a sealing ring 36, with the aid of which it is ensured that liquid from the separation chamber 22 cannot inadvertently reach the suction turbine 18 along the outside of the turbine inlet line 20.

At a distance from the first partition wall 34 and aligned parallel thereto, the base part 12 has a second partition wall 38. The suction turbine 18 is arranged between the first partition 34 and the second partition 38, and the electric motor 16 is arranged on the side of the second partition 38 facing away from the suction turbine 18 in a drive chamber 40 of the base part 12. A motor shaft 42 of the electric motor 16 passes through the second partition 38 and is connected to the suction turbine 18 in a rotationally fixed manner. The suction turbine 18 can be set in rotation by means of the motor shaft 42.

In addition to the electric motor 16, a rechargeable battery 44 and control, switching and charging electronics 46 are positioned in the drive chamber 40. The control, switching and charging electronics 46 act with an actuating element 48 together, which is designed in the illustrated embodiment as a pressure switch for switching the electric motor 16 on and off. In addition, the control, switching and charging electronics 46 control the speed of the electric motor 16 and the charging process of the battery 44. The control, switching and Charging electronics 46 and the battery 44 are arranged on a common circuit board 49.

The drive chamber 40 is arranged in a handle 50 of the base part 12. The handle 50 can be gripped by the user with one hand.

The handle 50 extends up to a bottom wall 52 of the base part 12, with which the portable hard surface cleaning device 10 can be placed on a footprint.

In addition to the base part 12 and the suction nozzle 32, the portable hard surface cleaning device 10 has a dirty liquid tank 54, which is held detachably on the base part 12 without tools and into which a filling device 56 is immersed. Liquid can get from the separation chamber 22 into the dirty liquid tank 54 via the filling device 56. The filling device 56 has a filler pipe 58 and a ventilation pipe 60, which are integrally connected to one another and are immersed in the dirty liquid tank 54.

The dirty liquid tank 54 has an upper tank section 62 facing the separation chamber 22, which can be inserted via an upper opening 63 into an upper recess 64 of the base part 12, and a rear tank section 66, which via a lower opening 67 into a lower recess 68 of the Base part 12 can be used. The upper recess is arranged laterally next to the suction turbine 18 and is in flow connection with the suction turbine 18, so that suction air can be released from the suction turbine 18 to the surroundings via the upper recess 64 and the upper opening 63.

A filling funnel 70 opens into the upper recess 64 and is connected in one piece to the first partition wall 34. Via the filling funnel 70, liquid can pass from the separation chamber 22 into a trough-shaped recess 72 in the filling device 56, which is followed by the filling pipe 58. The vent pipe 60 runs parallel to the filler pipe 58, with its upper end facing away from the dirty liquid tank 54 projecting over the filler pipe 58 and immersing it in the filler funnel 70.

The lower recess 68 is arranged directly above the bottom wall 58, the bottom wall 52 having resiliently deformable bottom wall sections in the region of the lower recess 68 and thereby exerting a resilient holding force on the dirty liquid tank 54 in the direction of a contact wall 74 arranged at a distance from the bottom wall 52 which the rear tank section 66 abuts with its top. The rear tank section 66 can be locked with the lower recess 68 by means of complementary locking elements.

The dirty liquid tank 54, together with the handle 50, delimits a gripping opening 75 of the portable hard surface cleaning device 10, which the user can grasp with his fingers when holding the portable hard surface cleaning device 10.

The suction nozzle 32 is in the Figures 3 to 7 shown separately. It has a suction nozzle housing 77 with a first housing half-shell 76 and a second housing half-shell 78, which are detachably connected to one another. In the illustrated embodiment, the two housing shells 76, 78 are screwed together.

The two housing half-shells 76, 78 delimit a suction channel 80 between them. With its rear end region facing the separation chamber 20, the suction channel 80 forms the already mentioned suction channel end section 30, which can be inserted into the suction channel receiving shaft 28. The suction channel 80 extends between the two housing half-shells 76, 78 from a suction opening 82 to the suction channel end section 30.

The first housing half-shell 78 forms a bottom wall 84 of the suction channel 80 and first curved side walls 86, 88 of the suction channel 80. In a corresponding manner, the second housing half-shell 76 forms a top wall 90 of the suction channel 80 and second curved side walls of the suction channel 80 the first side walls 86, 88 can be placed in a flow-tight manner.

In order to draw off liquid from a hard surface to be cleaned, the suction nozzle 32 has a first flexible pull-off lip 94 and a second flexible pull-off lip 92 in the area of the suction opening 82. The first pull-off lip 94 is molded onto the first housing half-shell 78 and, together with the first housing half-shell 78, forms an injection molded part with two components, namely with a hard component that forms the first housing half-shell 78 and with an elastomer component that forms the first pulling lip 74.

The suction channel 80 has a centrally arranged longitudinal axis 102 and the second flexible pull-off lip 92 is configured symmetrically to its central plane 96 aligned parallel to the longitudinal axis 102 and has a holding section 98 which is formed by a bead 100 which is essentially circular in cross section. The bead 100 extends transversely to the longitudinal axis 102 of the suction channel 80 along the entire length of the second pull-off lip 92 and forms its rear end region. The front end region of the second pull-off lip 92 is formed by a first pull-off edge 104 and a second pull-off edge 106, which run along an end face 108 of the second pull-off lip 92 facing away from the bead 100.

The first housing half-shell 78 has a plurality of holding elements for fixing the second pull-off lip 92, a plurality of first holding elements being arranged in the region of the suction channel and each forming a flow guide rib 114. The flow guide ribs 114 are arranged in a fan shape, so that they have an increasing inclination to the longitudinal axis 102 with increasing distance from the longitudinal axis 102 of the suction channel 80. All flow guide ribs 114 are arranged at the same height with respect to the longitudinal axis 102. They protrude vertically upward from the bottom wall 84 and each have a depression 118 on their upper edge 116 facing away from the bottom wall 84, into which the bead 100 is positively immersed. The depressions 118 are arranged in relation to the direction of flow in a rear end region of the flow guide ribs 114, and in a section in front of the depressions the upper edges 116 form a flat contact surface for the second pull-off lip 92. In cross section, the flow guide ribs 114 are wedge-shaped. The second pull-off lip 92 is supported in the region of the suction channel 80 with the aid of the flow guide ribs 114. The shape of the flow guide ribs 114 is optimized in terms of flow technology, and they taper in their front end area facing the first pull-off lip 94. In addition to their supporting function, the flow guide ribs 114 make it possible to guide a suction flow with very low flow losses, so that a mixture of liquid and suction air can flow between the flow guide ribs 114 with only slight flow losses.

In addition to the flow guide ribs 114, the first housing half-shell 78 has two further holding elements for fixing the second pull-off lip 92. These further holding elements are designed in the form of a holding groove 120 and a holding groove 122, each of which extends outside the suction channel from a first side wall 86 or 88 of the suction channel 80 to an outer wall 124, 126 of the first housing half-shell 78.

The second housing half-shell 78 has a holding element in the form of a holding groove 110 for fixing the second pull-off lip 92 to the suction opening 82. The holding groove 110 receives an upper edge region 112 of the bead 100. In a corresponding manner, the two holders 120, 122, which are arranged outside the suction channel 80, and the flow guide ribs 114, which are arranged inside the suction channel 80, each take a lower edge region 128 of the bead 100, so that the second pull-off lip 92 is fixed between the two housing half-shells 76, 78.

To clean a hard surface, the portable hard surface cleaning device 10 can be moved with the second pulling lip 92 along a hard surface to be cleaned. The second pull-off lip 92 can initially assume a first position of use, in which the first pull-off edge 104 faces the first pull-off lip 94, as shown for example in FIG Figure 7 is shown. When cleaning the hard surface, the first pull-off edge 104 slides along the hard surface to be cleaned in this first position of use. In particular, in cases where the hard surface has roughness, the first peeling edge 104 can be subject to wear. When a maximum degree of wear is reached, the cleaning effect which can be achieved by means of the first pull-off edge 104 can be impaired. The user then has the option of pulling the second pull-off lip 92 laterally out of the suction nozzle housing 77 via one of the outer walls 124, 126, rotating it 180 ° with respect to its central axis 130 and then pulling it back into the suction nozzle housing 77 via one of the outer walls 124, 126 . The second pull-off lip 92 then assumes a second position of use, in which the second pull-off edge 106 faces the first pull-off lip 94 and can slide along the hard surface to be cleaned. The service life of the second pull-off lip 92 can thereby be extended considerably.

As already mentioned, the suction channel end section 30 can be inserted into the suction channel receiving shaft 28 of the base part 12. This is particularly apparent from Figure 2 clear. In order to avoid that the suction nozzle 32 unintentionally detaches from the base part 12, the suction nozzle 32 can be locked with the base part 12. For this purpose, a latching recess 134 is arranged in the suction channel receiving shaft 28 and the first housing half-shell 78 forms a latching element in the form of a latching hook 136 in the region of the suction channel end section 30. The latching hook 136 has a spring tongue 138 which forms an elastically deformable wall section 139 of the suction channel 80 and is connected in one piece to the first housing half-shell 76. On his The free end carries the spring tongue 138 on the outside of the first housing half-shell 76 an outwardly protruding locking projection 140 Figure 6 clear. The spring tongue 138 is surrounded by a U-shaped through slot 142, with the exception of its end facing away from the locking projection 140, at which it is integrally connected to the first housing half-shell 76. When the suction channel end section 30 is inserted into the suction channel receiving shaft 28, this enables the spring tongue 138 to move resiliently until the latching projection 140 assumes a position at the height of the latching recess 134 and snaps into the latching recess 134. So that no suction air and no liquid can emerge from the suction channel 80 via the through-slot 142, the spring tongue 138 is extrusion-coated on the inside of the suction channel 80 by the same elastomer component that also forms the first pull-off lip 94. The elastomer component forms a U-shaped film hinge 143 in the region of the through-slot 142, which makes it possible to move the spring tongue 138 together with the latching projection 140 relative to the hard component forming the first housing half-shell 76, but it is ensured that through the through-slot 142 neither suction air nor liquid can escape from the suction channel 80.

The elastomer component extends from the non-replaceable pull-off lip 94 along the first side walls 86, 88 of the suction channel 80 to the latching hook 136. This is particularly evident from Figure 5 clear.

In combination with the elastomer component, the first housing half-shell 78 forms an injection molded part with a hard component and the elastomer component. The hard component preferably consists of a polypropylene or ABS material and the elastomer component preferably consists of thermoplastic elastomer material. The hard component forms the walls of the first housing half-shell 78 including the walls of the suction channel 80 and the spring tongue 138, and the elastomer component forms the first pull-off lip 92 and the film hinge 143.

After the suction nozzle 32 is connected to the base part 12 by inserting the suction channel end section 30 into the suction channel receiving shaft 38, the portable hard surface cleaning device 10 can be moved along the hard surface in the manner of a manual window puller for cleaning a hard surface, in particular a window pane or a glass door, by means of the second pull-off lip 92 and the first pull-off lip 94 supporting this on the hard surface of the suction opening 82 can be supplied. Via the suction channel 80, the liquid can be sucked together with air from the suction opening 82 and fed to the separation chamber 20. For this purpose, the separation chamber 20 can be subjected to a vacuum from the suction unit 14 via the turbine inlet line 20. The mixture of liquid and air flows through the suction channel 80 and, within the separation chamber 22, first meets a baffle plate 144 held at the suction channel end section 30, on which part of the liquid carried is separated. The liquid / air mixture then meets the baffle 24, on which the remaining entrained liquid separates, whereas the sucked-in air flows around the baffle plate 144 and the baffle 24 and reaches the suction turbine 18 via the turbine inlet line 20. The sucked-in air is discharged to the outside from the suction turbine 18 via an annular air outlet space 146 which surrounds the upper tank section 62 within the upper recess 64 in the circumferential direction.

The baffle plate 144 forms a first separating element for separating liquid, and the baffle wall 24 forms a second separating element for separating liquid from the aspirated liquid-air mixture. The liquid separated in the separation chamber 22 can reach the dirty liquid tank 54 via the filling funnel 70 and the filling pipe 58. If necessary, the dirty liquid tank 54 can be emptied. For this purpose, the user can remove the dirty liquid tank 54 together with the filling device 56 held thereon from the base part 12 by pulling the rear tank section 44 out of the lower recess 68 and then removing the upper tank section 62 from the upper recess 64. The user can then use the filling device Detach 56 from the dirty liquid tank 54 and empty the dirty liquid tank 54. The user can then reinsert the filling device 56 into the dirty liquid tank 54 and insert it with the upper tank section 62 into the upper recess 64 and with the rear tank section 66 into the lower recess and lock it with the base part 12.

If, after prolonged use of the portable hard surface cleaning device 10, the first or second pulling edge 104, 106 sliding along the hard surface to be cleaned is worn out, the user has the option of rotating the second pulling lip 92, as explained in detail above, by 180 ° about its central axis 130 to rotate, so that the previously unused pulling edge 104 or 106 can then be used.

The portable hard surface cleaning device 10 according to the invention is characterized by a long service life and can be moved along the hard surface by the user in the usual way in the manner of a manual window puller. The portable hard surface cleaning device 10 is characterized by low manufacturing costs.

Claims (10)

1. Suction nozzle for a portable hard surface cleaning device for squeegeeing off and suctioning off liquid from a hard surface, in particular from a window pane, comprising a suction nozzle housing (77) having a first and a second housing half-shell (76, 78) and having a suction opening (82) which has a least one flexible squeegee lip (92, 94) arranged thereat and which is adjoined by a suction duct (80) which extends to a suction duct end section (30), wherein a source of vacuum is connectable to the suction duct end section (30) for creating a suction flow and wherein a latch element (136) is arranged at the suction duct end section (30), characterized in that the first housing half-shell (76) comprises an elastically deformable wall section (139) which forms the latch element (136), wherein the first housing half-shell (76) forms an injection-moulded part having a hard component and an elastomer component, wherein the elastically deformable wall section (139) is formed by the hard component in the form of a spring tongue (138) which, except for a first end region thereof, is surrounded by a through-slot (142) extending through the hard component, and wherein the through-slot (142) is covered by the elastomer component integrally formed on the hard component.
2. Suction nozzle in accordance with claim 1, characterized in that at its free end portion, the spring tongue (138) has, on the outside thereof, a latch projection (140).
3. Suction nozzle in accordance with claim 2, characterized in that the spring tongue (138) in combination with the latch projection (140) forms a latch hook (136) formed from the hard component.
4. Suction nozzle in accordance with any one of claims 1 to 3, characterized in that the elastomer component is of U-shaped configuration in the area of the through-slot (142).
5. Suction nozzle in accordance with any one of claims 1 to 4, characterized in that the elastomer component forms a living hinge (143) in the area of the through-slot (142).
6. Suction nozzle in accordance with any one of claims 1 to 5, characterized in that integrally formed on the first housing half-shell (76) is a first flexible squeegee lip (94) formed from the elastomer component.
7. Suction nozzle in accordance with any one of claims 1 to 6, characterized in that the first housing half-shell (76) forms side walls (86, 88) of the suction duct (80), wherein the side walls (86, 88) are coated with the elastomer component.
8. Portable hard surface cleaning device for squeegeeing off and suctioning off liquid from a hard surface, in particular from a window pane, comprising a suction unit (14), a dirty-liquid tank (54) and a separating device (24, 144) for separating liquid from a liquid/air mixture drawn in, and comprising a suction nozzle (32) in accordance with any one of the preceding claims.
9. Portable hard surface cleaning device in accordance with claim 8, characterized in that the portable hard surface cleaning device (10) comprises a suction duct receiving socket (28) which is pluggably connectable with the suction duct end section (30) of the suction nozzle (32) and comprises a further latch element (134) cooperating with the latch element (136) of the suction nozzle (32).
10. Portable hard surface cleaning device in accordance with claim 8 or 9, characterized in that the portable hard surface cleaning device (10) comprises a separating chamber (22) which is located upstream of the suction unit (14) relative to the direction of flow and in which the separating device (24, 144) is arranged.

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