Holding plate for holding a vacuum cleaner filter bag in a vacuum cleaner

Abstract

The invention relates to a holding plate (2) for holding a vacuum cleaner filter bag in a holding device (20) in a dust collection chamber of a vacuum cleaner, wherein the holding plate (2) is designed to be inserted into the holding device (20) of the vacuum cleaner. The holding plate (2) comprises a base (2a), which has an upper face, a lower face, and a through-opening (14) from the upper face to the lower face, and a clamping element for producing a clamping connection between the holding plate and the holding device, said clamping element (6) being provided on the upper face of the base, on the lower face of the base and / or laterally on the base and having a higher elasticity than the base. The invention further relates to a holding device of a vacuum cleaner filter bag in a vacuum cleaner.

Description

[0001] Holding plate for holding a vacuum cleaner filter bag in a vacuum cleaner

[0002] The present invention relates to a holding plate for a vacuum cleaner filter bag, as well as a holding device for holding a vacuum cleaner filter bag with such a holding plate in a vacuum cleaner.

[0003] Conventional vacuum cleaner filter bags typically comprise an air-filtering filter medium and a retaining plate connected to the filter medium for holding the vacuum cleaner filter bag in a vacuum cleaner. The retaining plate contains an opening through which the airflow laden with dust and dirt enters the filter bag during vacuuming. To ensure proper operation of the vacuum cleaner, the vacuum cleaner and vacuum cleaner filter bag should be compatible. For example, the filter bag must be the correct size to achieve optimal use of space within the vacuum cleaner's dust collection chamber and optimal dust and dirt absorption capacity of the filter bag. To this end, manufacturers are increasingly ensuring that vacuum cleaners can only be operated with filter bags specifically designed for that vacuum cleaner.

[0004] DE 20 2013001096 U1 discloses a dust filter bag for a vacuum cleaner. The retaining plate of the dust filter bag has strip-shaped edge sections that engage with lateral guide arms of a retaining frame arranged in the vacuum cleaner. The strip-shaped edge sections each have a slot-shaped locking recess that forms a locking groove into which a locking lug arranged in the guide arm of the retaining frame engages. This makes the retaining plate specifically designed for the intended vacuum cleaner type.

[0005] This device for securing the retaining plate has a locking contour on the vacuum cleaner side in the form of a locking lug. Over time, and after numerous dust bag changes, these locking contours on the vacuum cleaner side become worn, so that the locking forces become increasingly weaker and the retaining plate may no longer be able to be secured in the correct position towards the end of the vacuum cleaner's life. The locking contours on the vacuum cleaner side, which engage with a designated mating contour on the retaining plate, must be precisely designed and, for this reason, must not wear excessively over the vacuum cleaner's lifetime.

[0006] In view of this, it is an object of the present invention to provide a retaining plate for a vacuum cleaner filter bag such that secure positioning and fixation of the retaining plate in a holding device for holding the retaining plate is primarily achieved by the retaining plate itself, without the need for complex and closure-intensive locking geometries on the device side. The described closure-related decrease in locking forces over time could be avoided in this way.

[0007] This object is achieved by the holding plate for holding a vacuum cleaner filter bag in a holding device in a dust collection chamber of a vacuum cleaner according to claim 1 and by the holding device for holding a vacuum cleaner filter bag in a vacuum cleaner according to claim 14. Further aspects can be found in the associated subclaims.

[0008] The present invention provides a holding plate for holding a vacuum cleaner filter bag in a holding device in a dust collection chamber of a vacuum cleaner, wherein the holding plate is designed to be inserted into the holding device of the vacuum cleaner. The holding plate comprises a base plate with a top side, a bottom side, and a passage opening from the top side to the bottom side, and a clamping element for establishing a clamped connection between the holding plate and the holding device, wherein the clamping element is arranged on the top side of the base plate, the bottom side of the base plate, and / or laterally on the base plate, and wherein the clamping element has a higher elasticity than the base plate.

[0009] The holding plate is secured in the holding device by clamping it in a device-side holding device using the elastic clamping element. The elastic properties of the clamping element mean that the static friction between the clamping element and the holding device holds the holding plate in the holding device. Since the clamping element is more elastic than the base plate, the clamping is predominantly performed by the clamping element. Additional fixing mechanisms, such as locking elements for locking the holding plate to the holding device, are not necessary for secure fixing of the holding plate. This eliminates the risk of potential wear to the locking elements on the (device-side) holding device and the resulting reduction in holding force over time. At most, wear will occur on the clamping element.However, since the clamping element is also regularly replaced with a new one when the retaining plate is replaced, this wear of the clamping element is not significant for the holding force over a long period of time.

[0010] Elasticity can be quantitatively characterized by the elastic modulus: The clamping element has a smaller elastic modulus than the base plate. This results in the clamping element deforming more when a force is applied than the base plate when the same force is applied. The clamping element can be made of a softer material than the base plate. This represents one way to achieve the greater elasticity of the clamping element compared to the base plate.

[0011] The material of the base plate and the material of the clamping element are different. The materials are especially different if they do not have the same material composition. A softer material exhibits greater deformation in response to a force than a harder material when the same force is applied.

[0012] A clamping element made of a softer material than the retaining plate can deform slightly when clamped into the holding device and can therefore be used for a wide variety of holding devices because there are no exact or strict requirements regarding the shape of the clamping element. Instead, differences between the dimensions of the retaining plate and the holding device can be compensated for by the elastic clamping element. This means that the retaining plate can be used for a wide variety of holding devices without having to be precisely matched to their shape and dimensions. This also means that the retaining plate itself can be produced with higher manufacturing tolerances and lower costs because deviations in the dimensions of the retaining plate can be compensated for within certain limits by the clamping element.

[0013] The invention further provides a holding plate for holding a vacuum cleaner filter bag in a holding device in a dust collection chamber of a vacuum cleaner, wherein the holding plate is designed to be inserted into the holding device of the vacuum cleaner. The holding plate comprises a base plate with a top side, a bottom side, and a clamping element, wherein the clamping element is arranged on the top side of the base plate, the bottom side of the base plate, and / or laterally on the base plate, and wherein the clamping element comprises a softer material than that of the base plate.

[0014] The clamping element can be located on a front edge of the base plate in the insertion direction on the top and / or bottom of the base plate, and / or the clamping element can be located on a lateral edge of the base plate with respect to an axis parallel to an insertion direction.

[0015] The insertion direction refers to the direction in which the holding plate is inserted into the holding device as intended so that it can be used in the manner intended. Accordingly, an edge can be defined which is at the front in the insertion direction. A clamping element arranged on the lateral edge clamps the holding plate laterally after the holding plate has been inserted into the holding device. The static friction between the clamping element and the holding device holds the holding plate securely in the holding device. This secure holding effect is also achieved if the clamping element is located on a top and / or bottom side of the base plate.

[0016] The holding plate can comprise two clamping elements, wherein both clamping elements are arranged at both ends of a front edge of the base plate in the insertion direction, or wherein both clamping elements are arranged at opposite lateral outer edges of the base plate with respect to an axis parallel to the insertion direction.

[0017] The arrangement at the leading edge does not necessarily mean that the clamping element is directly adjacent to the leading edge. Instead, there may also be a distance between the clamping element and the leading edge, for example, between 1 mm and 10 mm, in particular between 1 mm and 5 mm. Similarly, for the arrangement at one end of the leading edge, there may be a distance between 1 mm and 10 mm, in particular between 1 mm and 5 mm, between the end of the leading edge and the clamping element.

[0018] With two clamping elements, the retention of the retaining plate in the holding device is improved because the static friction now occurs at two points. Furthermore, the two clamping elements are located on opposite sides of the retaining plate. This clamps the retaining plate on both sides and protects it against any possible displacement or twisting caused by tensile forces acting on one side.

[0019] The clamping element, when arranged on the top and / or bottom of the base plate, may have a cross-section parallel to the base plate that is circular, oval or rectangular with optionally rounded corners.

[0020] The clamping element is variable in shape and can be adapted to the geometry of the base plate as needed. Therefore, the clamping element can be combined with a wide variety of base plates. Likewise, the shape of the clamping element can be adapted to the intended holding device. The holding plate is therefore not limited to a specific holding device, but offers a high degree of flexibility. This allows for a type of universal holding plate that can be used for a wide variety of holding devices in different vacuum cleaners from different manufacturers. The clamping element can have a cross-sectional area between 20 mm 2 and 200 mm 2 , especially between 50 mm 2 and 150 mm 2, when arranged on the top and / or bottom of the base plate, the clamping element can have a height of between 0.15 mm and 20 mm, in particular between 0.5 mm and 3 mm. In other words, the clamping element can protrude between 0.15 mm and 20 mm, in particular between 0.5 mm and 3 mm, from the top or bottom. When arranged laterally on the base plate, the clamping element can protrude from the base plate by 0.1 mm to 20 mm, in particular 0.5 mm to 15 mm.

[0021] The cross-sectional area of ​​the clamping element is parallel to the top and / or bottom of the base plate. Alternatively, the cross-sectional area is perpendicular to a side surface of the base plate. The cross-sectional area can also be the area of ​​the clamping element that would be viewed if viewed perpendicular to the top or bottom of the base plate.

[0022] The clamping element can be made of polyoxymethylene, acrylonitrile-butadiene-styrene copolymer, polypropylene, or a thermoplastic elastomer. Blends of these substances are also possible. The base plate can be made of polypropylene or polyethylene. If the base plate and clamping element are made of the same material, a different composition must be chosen to ensure that the clamping element is softer than the base plate.

[0023] These plastics exhibit high elasticity and are therefore suitable materials for the clamping element, ensuring a stable clamping connection with the holding device without causing wear on the holding device. Another advantage of polypropylene is that it is more cost-effective than polyoxymethylene and acrylonitrile butadiene styrene copolymer. This allows the advantage of reduced wear to be achieved while also saving costs. If both the base plate and the clamping element are made of polypropylene, a different material composition must be used for the clamping element to ensure the elasticity of the clamping element is greater than that of the base plate.

[0024] Recycled, i.e., reused, polypropylene or polyethylene can also be used for the base plate. In particular, this can be recycled polypropylene according to EN 15345:2008-02 or recycled polyethylene according to EN 15344:2008-02.

[0025] Vacuum cleaner filter bags, including the retaining plate, can be disposable. They can therefore be designed to be disposed of after use, e.g., when full. Therefore, for sustainability reasons, it is advantageous to manufacture at least parts of the retaining plate from recycled material. The materials of the base plate and the clamping element can also be characterized by their Shore A hardness. The Shore A hardness of the base plate material can range between 70 and 90, particularly between 75 and 85. The Shore A hardness of the clamping element material can range between 20 and 65, particularly between 30 and 50.

[0026] The retaining plate can be manufactured by injection molding. In particular, it is a two-component injection molding process.

[0027] Injection molding offers the advantage of allowing for efficient and reproducible production of variable shapes. In cases where the base plate and clamping element are made of different materials, two-component injection molding is particularly advantageous, as the complete retaining plate can be produced in one injection molding machine and a single work step. Furthermore, two-component injection molding makes it easy to create a wide variety of shapes for both the clamping element and the base plate. The above-mentioned materials for the base plate and clamping element are suitable for injection molding.

[0028] Alternatively, the base plate and clamping element can be produced separately. The clamping element is then connected to the base plate using methods such as welding, gluing, clipping, hot-staking, or other methods.

[0029] The retaining plate may further comprise a sealing element around the passage opening.

[0030] When the vacuum cleaner is in operation, a stream of suction air laden with dust and dirt is directed through the opening into the vacuum cleaner filter bag. The sealing element ensures that no dust or dirt can bypass the opening and enter the vacuum cleaner. This could lead to unwanted contamination of the vacuum cleaner and damage to the vacuum cleaner fan.

[0031] The sealing element may comprise a softer material than the base plate. The sealing element and the clamping element may comprise the softer material. In other words, the sealing element and the clamping element may comprise the same material.

[0032] A soft and elastic material, such as a thermoplastic elastomer, is typically used for the sealing element. It is now possible to produce the sealing element and the clamping element together during the manufacturing process, without the need for retooling, for example, to change materials. Especially with the aforementioned injection molding (or two-component injection molding), the clamping element and the sealing element can be molded in a single step. This ensures efficient and cost-effective production.

[0033] The clamping element can have a comb-like structure with a plurality of prongs, with the prongs projecting laterally from the base plate. This represents a particularly alternative to a clamping element made of a softer material than that of the base plate.

[0034] The present invention further provides a holding plate for holding a vacuum cleaner filter bag in a holding device in a dust collection chamber of a vacuum cleaner, wherein the holding plate is designed to be inserted into the holding device of the vacuum cleaner. The holding plate comprises a base plate with a top side, a bottom side, and a passage opening from the top side to the bottom, and a clamping element for establishing a clamped connection between the holding plate and the holding device, wherein the clamping element is arranged laterally on the base plate, and wherein the clamping element has a comb-like structure with a plurality of prongs, wherein the prongs protrude laterally from the base plate.

[0035] A higher level of elasticity of the clamping element can be achieved not only through its intrinsic softness, but also through its shape, even when the base plate and the clamping element are made of the same material, as is the case here. Here, the higher level of elasticity is achieved by designing the clamping element in the shape of a comb with a large number of prongs. The individual prongs form a springy contour that deforms more than the base plate in response to the application of force. When the holding plate is pushed into the holding device, the prongs are deformed and, similar to the clamping element made of a softer material arranged laterally on the base plate, ensure static friction between the clamping element and the holding device, which fixes the holding plate in place. It is not necessary to manufacture the prongs with high precision.

[0036] The holding plate can comprise two clamping elements, both of which have a comb-like structure with a plurality of prongs that protrude laterally from the base plate. Both clamping elements are arranged on opposite lateral outer edges of the base plate with respect to an axis parallel to the insertion direction. This creates a bilateral clamping of the holding plate in the holding device, resulting in greater fixation stability.

[0037] The prongs can protrude laterally from the base plate by between 1 mm and 20 mm, in particular 5 mm to 15 mm. The above statements regarding the material for the base plate and the production of the retaining plate by injection molding also apply to a retaining plate with a comb-like structure.

[0038] The base plate can have a maximum width perpendicular to the insertion direction of the retaining plate between 55 mm and 94 mm, and the distance between the center of the through-hole and a leading edge of the base plate in the insertion direction can be between 28 mm and 53 mm. These length specifications can also apply to the retaining plate.

[0039] The maximum width of the base plate refers to the maximum distance between two edges on the outer contour of the base plate along a direction perpendicular to the insertion direction of the holding plate.

[0040] The clamping element arranged laterally on the base plate can extend beyond the maximum width of the base plate. In other words, the width of the holding plate encompassing the clamping element is greater than the maximum width of the base plate. This also applies to a clamping element in the form of a comb-like structure.

[0041] The holding plate can further comprise a gripping section where the base plate has a local thickening. This gripping section is located, in particular, on a front edge of the holding plate opposite the insertion direction.

[0042] To release the retaining plate from the holding device, the user must apply a certain amount of pulling force. To do this, the user can easily grasp the retaining plate at the handle and pull accordingly. The local thickening allows the user to hold the retaining plate more easily while pulling.

[0043] The present invention also relates to a vacuum cleaner filter bag comprising a filter medium, in particular comprising a nonwoven fabric, and a retaining plate firmly connected to the filter medium, wherein the retaining plate is a retaining plate as described above. The connection can be an adhesive connection or a welded connection. The vacuum cleaner filter bag can be a flat bag.

[0044] Furthermore, the present invention provides a holding device for holding a vacuum cleaner filter bag in a vacuum cleaner. The holding device comprises a slot configured to receive a holding plate comprising a clamping element, so that the clamping element is clamped in the slot, thereby holding the holding plate in the slot, and a fixing recess for receiving the clamping element. The holding plate can be one of the previously described holding plates.

[0045] The slot is designed to accommodate the retaining plate. The slot can be a slot-like slot into which the retaining plate is threaded. The clamping element clamps against the walls or edges of the slot, ensuring the retaining plate is secured in the slot.

[0046] The fixing recess can be a depression in the insert. When the holding plate is inserted into the holder or insert, the clamping element is located in the fixing recess. This makes it easier for the user to identify the correct position of the holding plate in the insert. The fixing recess also improves the holding plate's retention by creating both a frictional and a positive fit.

[0047] The shape of the fixing recess can be matched to the shape of the clamping element. In particular, the fixing recess forms the counterpart to the clamping element.

[0048] The present invention further provides a system comprising a retaining plate as described above, which is inserted into the retaining device.

[0049] In addition, the present invention comprises a vacuum cleaner comprising the holding device described above.

[0050] The vacuum cleaner may further comprise a vacuum cleaner filter bag with a retaining plate as described above, wherein the retaining plate is inserted into the slot of the retaining device.

[0051] Further features and advantages are explained below using the example figures. They show:

[0052] Figure 1 is a schematic plan view of a first holding plate;

[0053] Figure 2 is a schematic plan view of a second retaining plate;

[0054] Figure 3 is a schematic plan view of a third retaining plate;

[0055] Figure 4 is a schematic plan view of a fourth retaining plate; and

[0056] Figure 5 shows a holding device for holding a vacuum cleaner filter bag in a vacuum cleaner, comprising the second holding plate. In the following and in the figures, the same reference numerals are used for the same or corresponding features in the various embodiments, unless otherwise specified.

[0057] Figure 1 shows a retaining plate 2 according to the invention for a vacuum cleaner filter bag as a schematic plan view. Shown is an upper side of the retaining plate 2, which is opposite a lower side. The retaining plate 2 comprises a base plate 2a with a passage opening 14 from the upper side to the lower side, through which the dirt and dust-laden suction air flow is directed into the interior of the vacuum cleaner filter bag during vacuuming. A sealing element 15, which comprises or consists of, for example, a thermoplastic elastomer or polypropylene, is located around the passage opening 14. The sealing element 15 serves the purpose of directing the suction air flow completely into the vacuum cleaner filter bag, so that no dust or dirt enters the interior of the vacuum cleaner.

[0058] The holding plate 2 further comprises two clamping elements 6, which are arranged laterally on the base plate 2a. The clamping elements 6 protrude laterally from the base plate 2a. In other words, the clamping elements 6 protrude laterally beyond the base plate. The clamping elements 6 protrude laterally between 1 mm and 20 mm, in particular between 5 mm and 15 mm, beyond the base plate 2a. An exemplary value is 8 mm.

[0059] The base plate 2a can have a maximum width perpendicular to an insertion direction E of the holding plate 2 between 55 mm and 94 mm, in particular 93 mm. A distance between the center of the passage opening 14 and a front edge 19 of the base plate 2a in the insertion direction E can be between 28 mm and 53 mm, in particular 50 mm. These length specifications can also apply to the holding plate 2. In particular, a width of the holding plate 2 at the location of the clamping elements 6 is greater than the maximum width of the base plate 2a. It follows that the maximum width of the holding plate 2 can be greater than the maximum width of the base plate 2a. This means that the holding plate 2 with a holding device actually only comes into contact with the clamping elements 6, not with the base plate 2a.

[0060] The clamping elements 6 can be arranged symmetrically about an axis parallel to the insertion direction E of the holding plate 2. The holding plate 2 can be axially symmetrical with respect to this axis. In particular, this axis can run through the center of the through-opening 14.

[0061] The clamping elements 6 have greater elasticity than the base plate 2a in that the clamping elements 6 comprise a softer material than the base plate 2a. Under the action of a force, the clamping elements 6 thus deform more than the base plate 2a, which comprises a harder material than the clamping elements 6. In other words, the clamping elements 6 have a lower modulus of elasticity than the base plate 2a. Suitable materials for the clamping elements 6 include polyoxymethylene, acrylonitrile-butadiene-styrene copolymer, polypropylene, polyethylene, or a thermoplastic elastomer, or mixtures thereof. Polypropylene and polyethylene (including recycled polypropylene and polyethylene) may be particularly preferred because they are more cost-effective than the other materials.

[0062] The sealing element 15 and the clamping elements 6 can be made of the same material. This simplifies the production of the retaining plate 2 because the sealing element 15 and the clamping elements 6 can be manufactured in a single step, for example, by injection molding. The retaining plate 2 can be manufactured overall by two-component injection molding.

[0063] The holding plate 2 optionally has a gripping portion 18. This can, for example, be formed on an edge portion of the holding plate 2, which is located at a rear edge in the insertion direction E of the holding plate 2. The gripping portion 18 has a local thickening. In other words, the holding plate 2 has a greater thickness in the region of the gripping portion 18. In this area, a user can easily grasp the holding plate 2 and pull on it to release the holding plate 2 from a jammed condition. The gripping portion 18 thus further improves the user's handling of the holding plate 2.

[0064] Such a holding plate 2 is designed to be inserted into a holding device of a vacuum cleaner (see Figure 5) and held there. The holding plate 2 is held there by clamping, whereby the elastic clamping element (or the elastic clamping elements) 6 are clamped in the holding device. The clamping includes, in particular, compressing the soft clamping element 6. The clamping creates static friction between the clamping element 6 and the holding device, which holds the holding plate 2 in the holding device.

[0065] Therefore, the mounting requires only the aforementioned clamping, which is essentially provided by the clamping elements and thus by the mounting plate itself. It is not necessary to provide specific locking geometries on the mounting device side, which can wear out over time, thus reducing the stability of the mounting over time.

[0066] A further advantage of a clamping element made of a softer material than the base plate is that when the clamping element is inserted into the holder and clamped into place, it is primarily the clamping element that wears due to friction, whereas the harder holder generally does not experience any significant wear. The holder plate is also replaced when the vacuum cleaner filter bag is changed, so that closing the clamping element is not a problem because a new clamping element is provided when the new holder plate is inserted. The holder, on the other hand, is not subjected to significant stress over many change cycles and is therefore very durable. The stability of the holder is therefore high and stable over a long period of time.

[0067] In addition, the elastic clamping element is capable of compensating for certain dimensional differences between the retaining plate and the retaining device. On the one hand, this allows for higher manufacturing tolerances, which simplifies the production of the retaining plate and reduces costs. On the other hand, the retaining plate can generally be used for a variety of retaining devices because precise dimensional coordination is no longer required. This allows previously specific retaining plates to be combined into a universal retaining plate for multiple vacuum cleaner types.

[0068] The illustrated retaining plate 2 can be part of a vacuum cleaner filter bag (not shown). The vacuum cleaner filter bag comprises a filter medium, wherein the filter medium is firmly connected to the retaining plate 2, for example, glued or welded. During vacuuming, an air stream laden with dirt and dust is directed through the passage opening 14 into the filter bag. The vacuum cleaner filter bag can, for example, be a flat bag.

[0069] Figure 2 shows a further holding plate 2 as a top view. This largely coincides with the holding plate from Figure 1, so redundant explanations are omitted here. The essential difference between the two embodiments lies in the arrangement and shape of the clamping elements 6. The two clamping elements 6 are arranged on the upper side of the base plate 2a, specifically at both ends of a front edge 19 of the base plate 2a in the insertion direction E. The clamping elements 6 do not have to be directly adjacent to the front edge 19 and / or its two ends. A distance between them of 1 mm to 10 mm, in particular 1 mm to 5 mm, is also possible. For example, 2 mm can be selected.

[0070] The two clamping elements 6 have a circular cross-section. The height of the clamping elements 6, as seen from the base plate 2a, can be between 0.5 mm and 20 mm, in particular between 2 mm and 5 mm. An exemplary value is 5 mm. The cross-sectional area of ​​the clamping elements 6 can be between 20 mm 2 and 200 mm 2 , especially between 50 mm 2 and 150 mm 2A large cross-sectional area offers greater static friction and secure fixation of the holding plate 2. If the cross-sectional area is too small, the static friction may not be sufficient to securely fix the holding plate 2. Holding the holding plate 2 in an associated holding device (this is explained in detail in Figure 5 and the associated description) is also achieved here by clamping the clamping elements 6 located on the upper side of the base plate 2a to the holding device. The advantages mentioned in connection with the first holding plate are provided by the second holding plate in an analogous manner.

[0071] The two clamping elements 6 can also be located on the underside of the base plate 2a. Likewise, one clamping element 6 can be arranged on the top side and the other clamping element 6 on the bottom side. The above statements apply accordingly.

[0072] Figure 3 shows a third retaining plate 2 comprising a clamping element 6 on the upper side of the base plate 2a. Furthermore, the clamping element 6 is located on the front edge of the base plate 2a in the insertion direction E, in particular centrally between the two ends of the front edge 19. The clamping element 6 has a rectangular cross-section, wherein the rectangle may have rounded corners.

[0073] For further information, please refer to the comments on the first and second retaining plates.

[0074] Figure 4 shows a fourth holding plate 2. This has a structural similarity to the first holding plate, so only the differences will be discussed here. The holding plate 2 comprises two clamping elements 6, which are arranged laterally on the base plate 2a. Unlike the first holding plate, however, the clamping elements 6 comprise the same material as the base plate 2a. Greater elasticity of the clamping elements 6 is instead achieved through their shape. For this purpose, the clamping elements 6 are designed in the form of a comb-like structure 8, which comprises a plurality of prongs 8a. The number and shape of the prongs 8a are of course not limited to the embodiment shown.

[0075] The comb-like structure 8 serves as a springy contour which deforms when inserted into the holding device and clamps with the holding device so that the holding plate is held.

[0076] Overall, the elastic, comb-like structure also allows a stable mounting of the holding plate 2 by clamping it in the holding device, analogous to the first holding plate.

[0077] Figure 5 shows a holding device 20 for holding a vacuum cleaner filter bag in a vacuum cleaner. The holding device 20 comprises an insert 12 which is designed such that a holding plate 2 comprising one or more clamping elements 6 is inserted therein, so that the clamping element 6 is clamped in the insert 12, whereby the holding plate 2 is held in the insert. The holding plate is the holding plate 2 from Figure 2. In the figure, the holding plate 2 is not fully pushed into the insert 12 for illustrative purposes. The insert 12 is, for example, a slot-like insert which, when the holding plate 2 is pushed in, surrounds the underside, the two side edges, the front edge 19 and part of the top side. The holding plate 2 is therefore held in the insert 12 from all sides.When the holding plate 2 is pushed into the insert 12, the clamping elements 6 are clamped to a corresponding side wall of the insert 12 and held there by the resulting static friction.

[0078] The holding device 20 comprises two fixing recesses 13 designed to receive the clamping elements 6. When the holding plate 2 is (fully) inserted into the insert 12, the clamping elements 6 are received by the fixing recesses. In particular, the fixing recesses 13 have a shape complementary to the clamping elements 6. This further improves the stability of the holder because the holding plate 2 is held not only by a frictional connection between the clamping elements 6 and the insert, but also by a positive connection between the clamping elements 6 and the fixing recesses.

[0079] By pulling the retaining plate 2 in the opposite direction to its insertion direction, the retaining plate 2 can be released from the clamping position and removed from the insert 12. The grip section 18 can prove advantageous for the handling of the retaining plate 2. The insertion and removal of the retaining plate 2 is possible over a plurality of cycles.

[0080] The insert 12 comprises a harder material than the clamping elements 6. For example, the base plate 2a and the insert 12 comprise the same material. As a result, wear or abrasion primarily occurs on the clamping element 6 due to friction between the insert 12 and the clamping element 6, while the insert 12 does not experience significant wear over a long period of time. However, since the retaining plate 2 is regularly replaced together with the clamping elements 6, wear on the clamping elements 6 is not significant.

[0081] It is understood that the present invention is not limited to the holding device shown. Thus, the holding device can also be used with a different holding plate, in particular those shown in Figures 1, 3, or 4. In these cases, the fixing recess 13 must be adapted in terms of shape and position according to the design of the respective clamping element 6.

[0082] The holding device 20 can be arranged in a dust collection chamber of a vacuum cleaner.

Claims

Claims 1. A holding plate (2) for holding a vacuum cleaner filter bag in a holding device (20) in a dust collection chamber of a vacuum cleaner, wherein the holding plate (2) is designed to be inserted into the holding device (20) of the vacuum cleaner, comprising: a base plate (2a) with a top side, a bottom side and a passage opening (14) from the top side to the bottom, and a clamping element (6) for establishing a clamped connection between the holding plate (2) and the holding device (20), wherein the clamping element (6) is arranged on the top side of the base plate (2a), the bottom side of the base plate (2a) and / or laterally on the base plate (2a), and wherein the clamping element (6) has a higher elasticity than the base plate (2a).

2. Holding plate (2) according to claim 1, wherein the clamping element (6) comprises a softer material than that of the base plate (2a).

3. Holding plate (2) according to claim 1 or 2, wherein the clamping element (6) is located on a front edge (19) of the base plate (2a) in the insertion direction (E) on the top and / or bottom of the base plate (2a); and / or wherein the clamping element (6) is located on a lateral edge of the base plate (2a) with respect to an axis parallel to an insertion direction (E).

4. Holding plate (2) according to one of the preceding claims, comprising two clamping elements (6), wherein both clamping elements (6) are arranged at both ends of a front edge (19) of the base plate (2a) in the insertion direction (E); or wherein both clamping elements (6) are arranged on opposite lateral outer edges of the base plate (2a) with respect to an axis parallel to the insertion direction (E).

5. Holding plate (2) according to one of the preceding claims, wherein the clamping element (6), when arranged on the top and / or bottom of the base plate (2a), has a cross-section parallel to the base plate which is circular, oval or rectangular with optionally rounded corners.

6. Holding plate (2) according to one of the preceding claims, wherein the clamping element (6) has a cross-sectional area between 20 mm 2 and 200 mm 2 , especially between 50 mm 2 and 150 mm 2 , and / or wherein the clamping element (6), when arranged on the top side or the bottom side, has a height between 0.15 mm and 20 mm, in particular 0.5 mm and 3 mm, and / or wherein the clamping element (6), when arranged laterally on the base plate, protrudes from the base plate by 0.1 mm to 20 mm, in particular 0.5 mm to 15 mm.

7. Holding plate (2) according to one of the preceding claims, wherein the clamping element (6) comprises polyoxymethylene, acrylonitrile-butadiene-styrene copolymer, polypropylene or a thermoplastic elastomer, and / or wherein the base plate (2a) comprises polypropylene or polyethylene.

8. Holding plate (2) according to one of the preceding claims, produced by injection molding, in particular by two-component injection molding.

9. Holding plate (2) according to one of the preceding claims, further comprising a sealing element (15) around the passage opening (14).

10. Holding plate (2) according to claim 9, wherein the sealing element (15) and the clamping element (6) comprise the softer material.

11. Holding plate (2) according to claim 1, wherein the clamping element (6) has a comb-like structure (8) with a plurality of prongs (8a), the prongs (8a) projecting laterally from the base plate (2a).

12. Holding plate (2) according to one of the preceding claims, wherein the base plate (2a) has a maximum width perpendicular to an insertion direction (E) of the holding plate (2) of between 55 mm and 94 mm, and wherein a distance between the center of the passage opening (14) and a front edge (19) of the base plate (2a) in the insertion direction (E) is between 28 mm and 53 mm.

13. Vacuum cleaner filter bag, comprising the holding plate (2) according to one of the preceding claims, and a filter medium, wherein the filter medium is firmly connected to the holding plate (2).

14. Holding device (20) for holding a vacuum cleaner filter bag (1) in a vacuum cleaner, the holding device (20) comprising: an insert (12) which is designed so that a holding plate (2) comprising a clamping element (6) is inserted therein, so that the clamping element (6) is clamped in the insert (12), whereby the holding plate (6) is held in the insert (12), and a fixing recess (13) for receiving the clamping element (6).

15. Vacuum cleaner comprising the holding device (20) according to claim 14.

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