Retainer plate with latching recess

Abstract

The present invention relates to a retainer plate (2) for a vacuum cleaner filter bag (1), comprising a latching recess (12a) which is designed to latch with a latching hook (12), and a through-opening (14), wherein the retainer plate has a maximum width perpendicular to an insertion direction of the retainer plate of between 55 mm and 94 mm, wherein a distance between the centre point of the through-opening and a front edge of the retainer plate in the insertion direction is between 28 mm and 53 mm, in particular 50 mm, and wherein the position of the latching recess satisfies one of four criteria. The invention also relates to a device (20) for retaining a vacuum cleaner filter bag in a vacuum cleaner, and to a vacuum cleaner.

Description

[0001] Holding plate with recess

[0002] The present invention relates to a holding plate for a vacuum cleaner filter bag, as well as a 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] EP 2 744 383 A1 discloses a holding plate for a vacuum cleaner filter bag, which has a key formed on one side and a concave recess on the outer lateral edge section on the opposite side. In an installed position, a spring on the device presses laterally into the concave recess of the holding plate, so that the key is pressed against a correspondingly designed lock in the housing of the upright vacuum cleaner. This coordination between the key on the holding plate and the lock on the vacuum cleaner, which is also referred to below as coding, prevents the use of a filter bag that is not intended or suitable for the vacuum cleaner.

[0005] Changing a vacuum cleaner filter bag with these characteristics requires many, sometimes complicated, steps. For example, when inserting a new, empty filter bag, the retaining plate must first be carefully pushed into a narrow slot in a retaining plate holder. Furthermore, the retaining plate can easily become jammed during removal due to the spring force acting only on one side and to the side. This generally makes changing the vacuum cleaner filter bag complicated and time-consuming. Therefore, it would be desirable to provide a retaining plate for a vacuum cleaner filter bag that offers easier handling during a vacuum cleaner filter bag change.In view of the above, it is an object of the present invention to provide a holding plate for a vacuum cleaner filter bag and an associated device for holding a vacuum cleaner filter bag in a vacuum cleaner, which enable an uncomplicated change of the associated vacuum cleaner filter bag.

[0006] This object is achieved by a holding plate for a vacuum cleaner filter bag according to claim 1 and by a device for holding a vacuum cleaner filter bag in a vacuum cleaner according to claim 9. Further aspects can be found in the associated subclaims.

[0007] According to the invention, the holding plate comprises a locking recess which is designed for locking with a locking hook, and a passage opening, wherein the holding plate has a maximum width perpendicular to an insertion direction of the holding plate between 55 mm and 94 mm, wherein a distance between the center of the passage opening and a front edge of the holding plate in the insertion direction is between 28 mm and 51 mm, and wherein the position of the locking recess fulfills one of the following criteria: a) the locking recess is located in an area which is arranged at a distance of between 34.5 mm and 51 mm around the center of the passage opening, wherein the area around the center of the passage opening is formed in an angular range between 62° and 90° starting from an axis which runs parallel to the insertion direction through the center of the passage opening; b) the locking recess is located, viewed from the center of the passage opening,in an area arranged at a distance of between 5 mm and 17 mm along the insertion direction and at a distance of between 36 mm and 48 mm perpendicular to the insertion direction; c) the locking recess is located, as seen from the center of the through-opening, in an area arranged at a distance of between 36 mm and 56 mm along the insertion direction and at a distance of between 31 mm and 41 mm perpendicular to the insertion direction; d) a ratio between the distance between the center of the through-opening and the front edge of the retaining plate and the shortest distance between the center of the through-opening and the locking recess is between 1.2 and 1.8, and an angle between the connecting line connecting the center of the through-opening and the front edge of the retaining plate and the connecting line connecting the center of the through-opening and the locking recess along the shortest distance,is between 65° and 85°. A retaining plate with these properties allows for easy handling when changing a vacuum cleaner filter bag, with the retaining plate attached to it. The retaining plate is held in a designated position, which is defined by the position of the locking recess, by a locking hook on the device side (i.e., on the vacuum cleaner side), which can be provided on a locking element. It is not necessary to slide the retaining plate into a narrow slot to hold the retaining plate in the designated position, because the correct position of the retaining plate is determined by the position of the locking recess. The need for a spring arranged laterally of the retaining plate is also eliminated.

[0008] The maximum width of the retaining plate can be 93 mm. The distance between the center of the through-hole and the front edge of the retaining plate in the insertion direction can be 50 mm.

[0009] The locking recess is designed for locking with a locking hook. This means that a device-side locking hook can lock into the locking recess. A locking hook (also known as a snap hook) refers to an element for the positive connection of components. A locking hook can comprise a joining part that can be brought into engagement with the component to be connected and creates the locking connection. For example, the joining part can be a projection on the locking hook that is designed to engage with the other component. The locking hook can be elastic so that it deforms when it is pressed against the holding plate. The joining part of the locking hook then locks into the holding plate, thus creating the positive connection. The locking connection can be reversible in that the positive connection between the holding plate and the locking hook can be released.

[0010] The locking recess can be formed in the form of an edge on the retaining plate. The edge can be a section of an outer contour or an inner contour of the retaining plate. In particular, the locking recess has an undercut. A joining part of the locking hook can then engage and be held in place with the undercut.

[0011] The maximum width of the retaining plate refers to the maximum distance between two edges on the outer contour of the retaining plate along a direction perpendicular to the insertion direction.

[0012] The retaining plate can be designed to be inserted into a device for holding a vacuum cleaner filter bag in a vacuum cleaner. The device comprises a locking hook that can be engaged with the locking recess. The insertion direction refers to the direction in which the retaining plate is inserted or inserted into the device as intended in order to be used in the intended manner. Accordingly, an edge can be defined that is at the front in the insertion direction.

[0013] The passage opening is an opening in the support plate through which the dust- and dirt-laden air passes during operation of the vacuum cleaner. In a vacuum cleaner filter bag, the filter medium is attached to the support plate, allowing air to pass through the passage opening into the interior of the filter medium. The passage opening can be circular. The center of the passage opening can be located on a central axis of the support plate. This central axis can divide the support plate into two halves, each half the maximum width.

[0014] The position of the locking recess and the length and distance specifications refer to the center of the through-hole as a reference point. The specific position of the locking recess according to criteria a) to d) has been found to allow for a stable mounting of the retaining plate in a vacuum cleaner while simultaneously ensuring easy handling for the user.

[0015] The above criteria b) and c) for the position or location of the locking recess can extend beyond the maximum width B ma x of the retaining plate can be described as follows: b) the locking recess is located, as seen from the center of the through-hole, in an area which is at a distance of between 5 mm and 17 mm along the insertion direction and at a distance of between (B ma x / 2 - 1 mm) and (B max / 2 - 10 mm) perpendicular to the insertion direction; c) the locking recess is located, as seen from the center of the through-opening, in an area which is at a distance of between 36 mm and 56 mm along the insertion direction and at a distance of between (B ma x / 2 - 5 mm) and (B ma x / 2 - 17 mm) is arranged perpendicular to the insertion direction.

[0016] With regard to criterion a), the locking recess can be arranged in the direction of the front edge in the direction of insertion, as seen from the centre of the passage opening.

[0017] The locking recess can be formed in the form of a hole in the retaining plate, in particular in the form of a through hole or a blind hole, wherein the hole forms an inner contour of the retaining plate. The shape of the inner contour corresponds in particular to the outer surface of a cylinder. The blind hole can in particular have an undercut designed for locking with a locking hook. A hole in the retaining plate as a locking recess also offers the advantage of easy handling when changing the vacuum cleaner filter bag.

[0018] Alternatively, the locking recess can be formed in the form of a recess in an outer contour of the retaining plate. Due to the recess, the width of the retaining plate along the direction perpendicular to the insertion direction is smaller in the area of ​​the locking recess than in an area directly adjacent to the locking recess.

[0019] This locking recess design also ensures easy handling. One advantage of the locking recess described above, compared to an edge (e.g., an outer contour), where the width of the retaining plate does not change, is that it prevents movement parallel to the edge, especially parallel to the insertion direction. The locking recess thus stabilizes the retaining plate's mounting in the vacuum cleaner.

[0020] The retaining plate can further comprise a further locking recess. The further locking recess can be arranged such that the arrangement of the two locking recesses is axially symmetrical. This axis of symmetry can be the aforementioned central axis. The central axis can, in particular, also be an axis of symmetry of the retaining plate.

[0021] Alternatively, the additional locking recess can also be designed such that it satisfies a different one of criteria a) to d) than the (first) locking recess. For example, if the locking recess is arranged according to criterion a), the additional locking recess can be arranged according to one of criteria b) to d).

[0022] For a holding plate with two locking recesses, two locking hooks are also provided on the device side. This improves the stability of the holding plate holder in the vacuum cleaner compared to a holder with only one locking recess. A symmetrical arrangement of the locking recesses around the center axis of the holding plate is particularly advantageous in terms of stability requirements, because the locking occurs in the same way on both sides of the holding plate. However, non-symmetrical arrangements of two locking recesses also offer greater stability when locked with the respective locking hook compared to a single locking recess.

[0023] The retaining plate can comprise a first key portion formed in a first region of the outer contour of the retaining plate, wherein the first key portion comprises a plurality of projections and recesses arranged between two adjacent projections. The key portion can be configured to cooperate with an engagement element on the device for holding a vacuum cleaner filter bag in a vacuum cleaner. The key portion and the engagement element are brought into engagement with one another.

[0024] The key portion essentially fulfills two functions, which result from its interaction with an engagement element of the device. The device can comprise an engagement element that can be engaged with the key portion. This engagement can, on the one hand, hold the retaining plate in the device in the intended position. On the other hand, this engagement can also be used to implement coding, in that engagement is only achieved when the key portion and the engagement element fit together. Thus, a retaining plate that is not provided for cannot be used in a vacuum cleaner with such a device.

[0025] The first key portion may be located in an area which, viewed from the center of the through-opening, is arranged at a distance of between 36 mm and 56 mm along the insertion direction and at a distance of between 31 mm and 41 mm in a direction perpendicular to the insertion direction.

[0026] The first key element can therefore be arranged like the locking recess, analogous to criterion c). As with the locking recess, this makes handling the retaining plate simple and convenient for the user.

[0027] Furthermore, the holding plate can be designed largely freely as long as it adheres to the specified dimensions.

[0028] Furthermore, the holding plate can comprise a second key portion which is formed in a second region of the outer contour of the holding plate, wherein the second key portion comprises a plurality of projections and recesses arranged between two adjacent projections, and wherein the first region is opposite the second region with respect to an axis parallel to the insertion direction, for example the central axis.

[0029] Key sections formed in both areas of the outer contour allow engagement with the locking element in both areas. This improves the stability of the retaining plate on the retaining plate holder.

[0030] The first key portion and the second key portion can comprise a plurality of projections and recesses arranged between two adjacent projections. In particular, each key portion can comprise two, three, four, or more projections. Accordingly, each key element can comprise one, two, three, or more recesses. The projections and recesses enable a secure interlocking between the engagement element and the key portions. Furthermore, the interlocking makes the holder more stable when a plurality of projections and recesses are involved. A higher number of projections can contribute to improved stability of the holder in the described device for holding a vacuum cleaner filter bag.

[0031] The projections can have a substantially rectangular or trapezoidal shape. These shapes are well suited to being gripped by a clamp of the engagement element, thus improving the stability of the mount.

[0032] The individual projections of the key sections can be of identical design. The individual projections can be of different design in terms of their shape and / or size. The spacing between adjacent projections, where the spacing is determined by the width of the corresponding recesses, particularly along the insertion direction, can also be of identical or different design in one or both key sections.

[0033] The projections of the first key section and the second key section can be elastic. Elastic in this case can mean that the projections deform in response to a tensile force exerted by the user. The vector of this tensile force is, in particular, perpendicular to an extension direction of the projections and in the plane of the passage opening.

[0034] This feature is advantageous when a positive fit exists between an engagement element of a locking element and the key sections when the locking element is in the closed position. A positive fit inherently prevents any further displacement of the retaining plate on the retaining plate holder. However, if the projections that mesh with the engagement element are elastic, a (minor) displacement of the retaining plate can still occur without affecting the positive fit. Such a displacement may be necessary, for example, to release the locking connection between the locking hook and the locking recess.

[0035] The retaining plate may be mirror-symmetrical with respect to the first key portion and the second key portion.

[0036] The retaining plate may be symmetrical with respect to a plane parallel to the thickness direction of the retaining plate.

[0037] The locking recess(es) can be spatially separated from the first key section and / or the second key section. The retaining plate can further comprise a gripping section, where the retaining plate has a local thickening. This gripping section is located, in particular, on a rear edge of the retaining plate in the insertion direction.

[0038] The locking mechanism between the retaining plate and the locking hook of the locking element can be released by sliding it. To do this, the user can easily grasp the retaining plate at the handle and pull accordingly. The local thickening makes it easier for the user to hold the retaining plate while pulling.

[0039] A delimiter of the locking recess can be formed integrally with the rest of the retaining plate. This means that the retaining plate and the delimiter of the locking recess can be made of the same material.

[0040] The retaining plate can thus be manufactured from a single material, making the process particularly simple and efficient. For example, the retaining plate can be manufactured using injection molding. This allows for a wide variety of shapes.

[0041] Alternatively, the boundary of the locking recess can be made of a different material than the rest of the retaining plate. In particular, the retaining plate can be manufactured using two-component injection molding.

[0042] These considerations regarding the material of the delimitation of the locking recess apply equally to any additional locking recess that may be provided.

[0043] The locking recess or its border can be made of a different material than the rest of the retaining plate. For example, it may be desirable for the locking recess, or an edge of the locking recess, to be made of a softer or more elastic material than the rest of the retaining plate. This makes it easier to reverse the locking action with the locking hook. Likewise, a more stable form fit with the locking hook can be achieved because the softer material practically clings to the locking hook. In such a case, the two-component injection molding process is suitable for production because it allows for efficient production of molds comprising two different materials.

[0044] Suitable materials for the retaining plate, in particular for the locking recess (or its boundary), are plastic materials such as polyoxymethylene (POM), acrylonitrile-butadiene-styrene copolymer (ABS), polypropylene (PP), polyethylene (PE) or polyethylene terephthalate (PET) or mixtures thereof. The retaining plate can comprise a material made from recycled materials and / or renewable raw materials. Recycled materials include, for example, reused (recycled) plastic. Renewable raw materials include, in particular, paper, cardboard, hay or other plant-based materials. Examples of recycled plastic are recycled polypropylene (rPP), recycled polyethylene (rPE), recycled polyethylene terephthalate (rPET) or mixtures thereof. In particular, these can be recycled plastics according to one or more of the DIN standards EN 15342:2008-02, EN 15344:2008-02, EN 15345:2008-02, or EN 15346:2015-01.

[0045] Vacuum cleaner filter bags, including the retaining plate, can be disposable. They may be designed to be disposed of after use when full. Therefore, for sustainability reasons, it's advantageous to manufacture at least the retaining plate from a recycled or renewable raw material.

[0046] 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.

[0047] Furthermore, the invention provides a device for holding a vacuum cleaner filter chisel in a vacuum cleaner. The device comprises a holding plate receptacle with a support surface, wherein the support surface is designed to receive a previously described holding plate, and a locking element pivotable between an open position and a closed position, wherein the locking element comprises a latching hook, wherein the latching hook is designed to latch, in the closed position of the locking element, into the latching recess of the holding plate received on the holding plate receptacle, such that the locking element is held in the closed position by the latching hook.

[0048] These features simplify handling for the vacuum cleaner user, especially when inserting and removing the vacuum cleaner filter bag. Simply place the vacuum cleaner filter bag's retaining plate onto the retaining plate holder. Furthermore, the force holding the retaining plate in the specified position does not act laterally, preventing the retaining plate from jamming. When removing the vacuum cleaner filter bag, it can be easily lifted out of the vacuum cleaner as soon as the locking element is in the open position.

[0049] The retaining plate holder serves to hold the retaining plate. The retaining plate holder has a support surface that accommodates the retaining plate, for example, by placing the retaining plate on the support surface. The support surface can be a flat surface. This allows the retaining plate holder to be designed simply. The retaining plate can be placed onto the retaining plate holder from above and removed again in the opposite direction. A retaining plate held by the retaining plate holder rests on the support surface of the retaining plate holder.

[0050] Even if the retaining plate holder has a structure, the support surface can still be considered a plane if a flat retaining plate rests / is arranged on the support surface. For example, the support surface can be the plane spanned by the contact points between the retaining plate and the retaining plate holder.

[0051] The locking element can be pivoted between an open and a closed position. Thus, the locking element can have a pivot axis. The pivot axis can be located in the plane of the support surface of the retaining plate holder. Alternatively, the pivot axis can be arranged above the support surface of the retaining plate holder.

[0052] The retaining plate holder can further comprise a bearing element configured to hold the retaining plate against movement perpendicular to the support surface of the retaining plate holder. The bearing element can also be configured to hold the retaining plate against lateral movement on the retaining plate holder parallel to the support surface.

[0053] In other words, the bearing element can be configured to hold / secure the retaining plate against movement perpendicular to the support surface and to hold / secure it against movement parallel to the support surface. Thus, the bearing element restricts movement of the retaining plate at least along two axes. These two axes are, incidentally, perpendicular to each other.

[0054] For improved stability, when locking the locking element and the retaining plate, it is advisable to secure the retaining plate against any lateral or sideways movement on the retaining plate holder and / or against removal from the retaining plate holder. Furthermore, the bearing element defines the predefined position of the retaining plate on the retaining plate holder, thus providing the user with guidance on how to insert the retaining plate. This simplifies correct handling for the user and prevents any incorrect insertion of the retaining plate.

[0055] The bearing element can be a rigid component of the holding plate holder. Alternatively, the bearing element can be a flexible component of the holding plate holder and, for example, can be pivoted into its intended storage position, in which the holding plate is fixed, when the holding plate is arranged on the holding plate holder. The advantage of such an arrangement of the bearing element is that the holding plate can be placed freely on the holding plate holder without being obstructed by the bearing element. This further increases user comfort.

[0056] The device may further comprise a spring element that exerts a spring force that pushes the locking element toward the open position. Alternatively, the spring element may exert a force that counteracts a holding force of the locking hook.

[0057] If the locking hook is not engaged with the retaining plate, the spring force ultimately forces the locking element into the open position, or at least toward the open position. If the locking hook is engaged with the retaining plate, the locking element is held in the closed position by the locking mechanism, counteracting the spring force. For this purpose, the retaining plate is fixed by the bearing element, preventing the retaining plate from being lifted from the retaining plate holder by the spring force.

[0058] The spring element may comprise a leg spring, a torsion spring, a roller spring, a coil spring, a wheel spring, a bow spring, a bar spring or a leaf spring or may include a combination of the aforementioned spring types.

[0059] The spring element can be attached to the retaining plate holder and / or the locking element. Alternatively, the spring element can also be attached to another component, such as a vacuum cleaner housing. In the case of a leg spring, the center of the leg spring can be located on the pivot axis of the locking element. One of the two legs of the leg spring presses against the locking element, while the other leg presses against the retaining plate holder or the housing.

[0060] When the locking mechanism between the locking element and the retaining plate is released, the locking element opens automatically due to the spring force and does not require a separate handling step by the user. This simplifies the use of the device.

[0061] The locking element of the device can comprise, on a side facing the retaining plate receptacle, an engagement element designed to engage with the first key portion and / or second key portion of the retaining plate. The device can therefore be designed, in particular, to receive a retaining plate with a first and / or second key element. The engagement element, which is formed on or in the locking element, is designed to hold the retaining plate in the predetermined position when the locking element is in the closed position. For this purpose, the engagement element is engaged with the key portion of the retaining plate. The retaining plate and the engagement element can engage or be engaged in a form-fitting manner. Alternatively, the engagement can allow freedom of movement so that the retaining plate remains movable (slidable) on the retaining plate receptacle.This can be achieved, for example, by leaving a gap between the engagement element and the key portion when the two elements are engaged or by components of the engagement element and / or the key portion in the retaining plate being elastic.

[0062] The terms “interlock” and “be engaged” are to be understood as synonymous in the context of this description.

[0063] The specified position is the position on the retaining plate holder in which the retaining plate must be positioned for the vacuum cleaner to operate as intended. Specifically, this means that the dust-laden air conveyed through a suction hose and / or suction nozzle is directed through the opening of the retaining plate into the vacuum cleaner filter bag. In this case, the opening of the retaining plate is positioned in accordance with the suction hose or an associated suction nozzle.

[0064] The engagement element can comprise one or both of the following configurations. The engagement element can comprise a projection that engages with a recess in the retaining plate when the closure element is in the closed position. The engagement element can comprise a clip that engages a projection in the retaining plate when the closure element is in the closed position. The second configuration can also mean that the clip partially abuts the projection in the retaining plate when the closure element is in the closed position.

[0065] All of the options mentioned ensure that the retaining plate is securely held in the specified position through the interlocking between the engagement element and the projection / recess in the retaining plate. In addition, a positive fit can also be achieved in this way. This holding principle is applicable for a flexible design of the retaining plate, and on the other hand, the retaining plate and the engagement element can be specifically coordinated with one another. The latter point allows for so-called coding, in which those retaining plates can be used together with the device which have this interlocking through a specific pattern of projections and recesses. The engagement element can comprise a plurality of projections and / or clamps. In particular, the respective number can correspond to the number of projections and recesses in the retaining plate.

[0066] The device may additionally comprise a further locking hook which is arranged such that it engages with the further locking recess of the holding plate in the closed position of the locking element.

[0067] By having a second locking hook that engages with the retaining plate, the load on each individual locking hook is reduced, increasing the stability and reliability of the device. Damage to one locking hook is less likely, and in the event of damage, a second locking hook is available. If the retaining plate is locked on different sides of the retaining plate, one-sided loading of the retaining plate due to a one-sided pull of the locking hook is also avoided, because the force of the locking hook acts symmetrically on the retaining plate and not on one side. This also improves the stability of the device.

[0068] The device can also comprise a stop element, which is part of the locking element and is designed such that abutment of the retaining plate against the stop element leads to a pivoting of the locking element from the open position toward the closed position. Abutment of the retaining plate against the stop element can also lead to a (complete) pivoting of the locking element into the closed position. The latter optionally also includes the locking of the locking hook with the retaining plate.

[0069] The stop element can serve as an indicator that the holding plate is in the specified position on the holding plate holder. The user can easily see that the holding plate has been inserted correctly by the triggered pivoting of the locking element. This ensures correct use of the vacuum cleaner by reliably inserting the holding plate into the specified position. In addition, in order to hold the holding plate in the specified position, the locking element must be pivoted into the closed position. This can happen at least partially automatically with the help of the stop element. It is also possible for the stop element to pivot completely into the closed position when the user moves the holding plate into the specified position, which improves comfort for the user and makes the device easier to handle.

[0070] Furthermore, the present invention relates to a vacuum cleaner comprising a housing with a lid and the described device for holding a vacuum cleaner filter bag, wherein the device is arranged in a dust collection chamber of the vacuum cleaner, wherein the lid is pivotally attached to the housing and is provided for closing the dust collection chamber, wherein the lid of the housing is closable when the closing element is in the closed position, and wherein the lid of the housing is not closable when the closing element is in the open position.

[0071] The locking element in the open position prevents the housing cover from being closed. For example, the cover can be a pivoting part of the housing that locks into place with the rest of the housing for closure. The locking element in the open position can block the pivoting of the cover by protruding from the housing in the open position, preventing the cover from locking into place with the rest of the housing.

[0072] The locking element remains in the open position if a spring element is provided and no retaining plate is arranged on the retaining plate holder, because the locking hook cannot engage and the spring force pushes the locking element towards the open position. If, as a result, the lid cannot be closed and remains open, no suction can take place because the vacuum cleaner draws ambient air into the fan through the open lid and achieves no suction. Damage to the vacuum cleaner caused by vacuuming without a vacuum cleaner filter bag, which can be caused in particular by dust and dirt getting into the fan, can thus be effectively prevented.

[0073] Further features and advantages are explained below using the example figures. They show:

[0074] Figure 1 is a plan view, not to scale, of a first retaining plate;

[0075] Figure 2 is a plan view, not to scale, of a second retaining plate;

[0076] Figure 3 is a plan view, not to scale, of a third retaining plate;

[0077] Figure 4 is a plan view, not to scale, of a fourth retaining plate;

[0078] Figure 5 is an oblique view of a device for holding a vacuum cleaner in a vacuum cleaner;

[0079] Figure 6 is an oblique view of the device with a holding plate arranged therein; and

[0080] Figure 7 shows a vacuum cleaner comprising a device for holding a vacuum cleaner

[0081] Filter bag in a vacuum cleaner and a holding plate in an oblique view. 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.

[0082] Figure 1 shows a top view of a retaining plate 2 according to the invention for a vacuum cleaner filter bag, which is not necessarily to scale. It shows the top side of the retaining plate 2. The retaining plate 2 has a passage opening 14 through which the suction air stream laden with dirt and dust is directed into the interior of the vacuum cleaner filter bag during vacuuming. The center of the passage opening 14 is designated M. A seal 15, which consists, for example, of or comprises a thermoplastic elastomer, is located around the passage opening 14.

[0083] The retaining plate 2 has an outer contour 9. A locking recess 12a or cutout is located in one side of the outer contour. In the area of ​​the cutout, the width of the retaining plate 2 is smaller than in an area adjacent to the cutout. As described in detail in connection with Figures 4 and 5, the locking recess 12a interacts with a locking hook of a device for holding the retaining plate 2 in such a way that the locking hook locks onto the retaining plate 2 at the locking recess 12a.

[0084] In the figure, the maximum width B max of the holding plate 2 is shown. According to the invention, this ranges between 55 mm and 94 mm, with the maximum width being, for example, 93 mm. A distance between the center point M of the through-opening 14 and a front edge 19 in the insertion direction E is, according to the invention, between 28 mm and 53 mm. In this embodiment, this distance is 50 mm. The insertion direction E is the direction in which the holding plate is inserted or pushed into the device.

[0085] The locking recess 12a is located in an area extending from the center point M of the through-opening 14 at a distance xi between 5 mm and 17 mm along the insertion direction E, and at a distance X2 between 36 mm and 48 mm perpendicular to the insertion direction E. This area is shown in the figure as a dashed rectangle. The locking recess 12a does not have to completely fill this area, but merely needs to be located within this area.

[0086] The locking recess 12a does not necessarily have to be located to the left of the through-opening 14, but can be located symmetrically to the right of the through-opening 14. "Left" and "right" refer to the position of the locking recess 12a relative to the through-opening 14 in the plan view of the holding plate 2. It is also possible to arrange the locking recess on both sides, to the left and right of the through-opening. Such a holding plate allows for easy handling when changing a vacuum cleaner filter bag, with the holding plate attached to it. The holding plate is held in a designated position, which is defined by the position of the locking recess, by a locking element on the device side (i.e., attached to the vacuum cleaner side) (see also Figures 5 and 6).

[0087] The holding plate optionally has a gripping section 18. This can, for example, be formed in a region of the outer contour of the holding plate 2 that lies opposite the front edge 19 with respect to the center point M. The gripping section 18 has a local thickening. In other words, the holding plate 2 has a greater thickness in the region of the gripping section 18. In this area, a user can easily grasp the holding plate and pull it in a direction parallel to the support surface. This step is necessary to release a locking connection between the locking recess 12a and the locking hook. The gripping section 18 thus further improves the handling of the holding plate 2 for a user.

[0088] 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, which is connected to the retaining plate, 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.

[0089] Alternatively, the position of the locking recess 12a can be defined via a radius and an angular range, as shown in Figure 2. Otherwise, the holding plate 2 corresponds to that in Figure 1, which is why repeated explanations are omitted. The locking recess 12a is located in an area that is arranged at a distance of between 34.5 mm and 51 mm around the center point M of the through-opening 14, wherein the area around the center point M of the through-opening 14 is formed in an angular range between Qi and 02, starting from an axis that runs parallel to the insertion direction E through the center point M of the through-opening 14. The locking recess is located in the direction of the front edge 19, viewed from the center point M. Here, too, the locking recess 12a only has to lie within the area, but does not have to fill it completely.

[0090] The area defined by this criterion, which is outlined by dashed lines, corresponds to a circular segment obtained by subtracting a circular sector with a radius of 34.5 mm from a circular sector with a radius of 51 mm. Alternatively, the area corresponds to a circular ring segment with an inner radius of 34.5 mm and an outer radius of 51 mm in an angular range between Qi and 02 around the center M, starting from an axis parallel to the insertion direction E through the center M of the passage opening 14. For example, Oi = 62° and 02 = 90°.

[0091] Figure 3 shows a plan view of another holding plate 2 according to the invention. This largely corresponds to the embodiment in Figure 1, so that a repeated explanation is omitted here. One difference between the two embodiments is that the locking recess 12a is in the form of a hole in the holding plate 2. The figure shows a through hole as the locking recess 12a, although a blind hole is also conceivable. The edge of the hole defines an inner contour of the holding plate 2. This inner contour describes a lateral surface of a cylinder. However, other inner contours, such as a cuboid, are also conceivable.

[0092] Regarding the position of the hole, the same criteria apply as in the embodiment shown in Figure 1, especially with regard to the dimensions Bmax, xi, and yi. For example, B ma x = 93mm, xi = 15mm, yi = 40mm.

[0093] A third variant of a holding plate is shown in Figure 4, which results from the holding plate according to Figure 1 by the following modifications.

[0094] First, the retaining plate 2 has a further locking recess 12b in the form of a recess in the outer contour 9 of the retaining plate 2. It is intended for interaction with another locking hook of the device. The further locking recess is located in an opposite section of the outer contour 9 with respect to the aforementioned axis, which runs through the center point M of the through-opening 14 and along the insertion direction E.

[0095] It is understood that a retaining plate 2 according to the invention can also comprise two holes as locking recesses at the aforementioned positions instead of the two recesses. It is also conceivable for the (first) locking recess to be in the form of a hole and the further (second) locking recess to be in the form of a recess, or vice versa.

[0096] An arrangement of the locking recesses 12a, 12b on opposite sections of the outer contour 9 is particularly advantageous with regard to the stability requirements because the locking takes place in the same way on both sides of the holding plate.

[0097] In addition, a first key section 8 is formed in a first portion of the outer contour 9. This comprises a plurality of projections 8a. These projections 8a lie in a plane of the retaining plate 2. The projections 8a can, in particular, be rectangular or trapezoidal (also referred to as teeth). However, the shape of the projections 8a is not limited by this. A recess 8b is located between two adjacent projections 8a or teeth. The first key section 8 shown has a total of four projections 8a and three recesses 8b, although other suitable values ​​can also be used.

[0098] A second key section 8 is formed in a second section of the outer contour 9. The first section lies opposite the second section, whereby the same definition applies for "opposite" as in connection with the locking recesses 12a, 12b. The same definitions apply to the second key section 8 as to the first key section 8 (e.g., with regard to the shape and number of projections). The two key sections can be symmetrical or congruent. In other words, the holding plate 2 is mirror-symmetrical with respect to the two key sections 8. Alternatively, the two key sections 8 can also differ in shape.

[0099] The two key sections 8 are designed to interact with an engagement element of the device, so that the holding plate 2 is held in a predetermined position. In particular, this holding / fixing is achieved by an interlocking between the engagement element and the key sections (see Figure 5). Since the key sections are formed in both areas of the outer contour 9 of the holding plate 2, the holding is not only on one side, and the holding plate 2 can be better secured against displacement, especially rotation.

[0100] The first key section 8 and the second key section 8 also serve as a coding system, ensuring that only retaining plates with the correct key section can be used in combination with a device described below. This effectively prevents unsuitable vacuum cleaner filter bags from being used for a vacuum cleaner. This aspect will be explained in more detail in connection with Figure 6.

[0101] Overall, the holding plate 2 is axially symmetrical with respect to an axis parallel to the insertion direction and through the center point M of the passage opening 14.

[0102] Figure 5 shows an oblique view of a device 20 according to the invention for holding a vacuum cleaner filter bag in a vacuum cleaner. The device 20 comprises a holding plate receptacle 5 with a support surface and a closing element 4. The closing element 4 can be pivoted between a closed position and an open position. Figure 5 shows the closing element 4 in the open position. The holding plate receptacle 5 is designed to hold a holding plate of a vacuum cleaner filter bag on the support surface of the holding plate receptacle 5. For this purpose, the holding plate can, for example, be placed on the support surface of the holding plate receptacle 5 (the holding plate itself is not shown; see Figure 6).Compared to slot-like inserts for the holding plate known in the prior art, inserting the holding plate with the device 20 shown is considerably simplified because the user no longer has to thread the holding plate into the insert, but simply needs to place the holding plate onto the holding plate receptacle 5. The holding plate receptacle 5 has a recess 22 (shown with opposite hatching) located below the opening of the holding plate when this holding plate is arranged on the holding plate receptacle 5. This serves the purpose of ensuring that a filter medium attached to the holding plate has sufficient space and that the dust-laden air can be guided through the opening into the filter medium.

[0103] A locking hook 12 is arranged on the locking element 4. The locking hook 12 is arranged on the side of the locking element 4 facing the retaining plate receptacle 5. The function of the locking hook 12 will be explained in more detail in connection with Figure 6. The locking hook comprises a joining part. This is the outer projection of the locking hook 12, which is designed for locking.

[0104] The holding plate holder 5 further comprises a bearing element 16. The bearing element 16 is designed to hold the holding plate against movement perpendicular to the support surface of the holding plate holder 5. The holding plate cannot therefore be removed upwards, i.e., vertically to the support surface of the holding plate holder 5. In addition, the bearing element 16 also fixes the holding plate against lateral movements of the holding plate parallel to the support surface of the holding plate holder 5. As a result, the holding plate 5 can essentially only be moved along one axis. This one axis, along which the holding plate remains movable, can, for example, be perpendicular to the pivot axis of the closing element 4. This makes it easier for a user to find the predetermined position of the holding plate on the holding plate holder 5.

[0105] The device 20 further comprises a spring element 3. The spring element 3 exerts a spring force on the closing element 4, so that it is pushed towards the open position. The spring element 3 is connected to the closing element 4 and to the holding plate receptacle 5, but is not limited to this arrangement, as there are several ways of implementing the spring element 3 to achieve the aforementioned effect. For example, as shown in the figure, a leg spring can be arranged on the pivot axis 11 of the closing element 4, which exerts a torque when the closing element 4 is pivoted towards the closed position. More precisely, the center of the leg spring is located on the pivot axis 11, and one of the two legs presses against the closing element 4, while the other leg presses against the holding plate receptacle 5 or a part of the housing.The connection to the retaining plate holder 5 serves to ensure the stability of the suspension of the spring element 3. Another possibility is a curved leaf spring or flat spring mounted on the support surface of the retaining plate holder 5. When the locking element 4 is in the closed position, it presses on the leaf or flat spring, which accordingly exerts a spring force toward the open position.

[0106] Finally, the device 20 comprises an optional stop element 17. The stop element 17 is essentially a part of the locking element 4 and is designed such that abutment of the retaining plate against the stop element 17 leads to a pivoting of the locking element toward the closed position. For example, the stop element 17 is a projection on the locking element 4 against which the retaining plate strikes in the predetermined position. Since the pivot axis 11 of the locking element 17 does not coincide with the stop point of the retaining plate, a torque is exerted on the locking element 4, which leads to its pivoting. The stop element 17 thus serves, among other things, as an indicator that the retaining plate is in the predetermined position on the retaining plate holder 5. The user can therefore directly recognize the triggered pivoting of the locking element 4, indicating that the retaining plate has been inserted correctly.

[0107] It is also possible that abutment of the retaining plate against the stop element 17 leads to a (complete) pivoting of the locking element 4 into the closed position. When the retaining plate is inserted into the predetermined position on the retaining plate holder 5, the locking element 4 is pivoted into the closed position and thereby locks into the retaining plate.

[0108] The closing element 4 can be essentially U-shaped with two legs. In this case, the two legs are particularly symmetrical, with a locking hook 12 being provided on both legs. The holding plate is therefore held symmetrically on the two edge sections of the holding plate, which enables optimal holding and even distribution of the acting forces. An advantage of the U-shape is that the two legs fix the holding plate well, but at the same time sufficient space remains between the two legs so that the opening and the seal of the holding plate do not come into contact with the closing element. The U-shape therefore represents an efficient design that does not restrict the function or geometry of the holding plate. Figure 6 shows the device 20 from Figure 5 with the closing element 4 in the closed position.In addition, a holding plate 2 is shown, which is located on the holding plate holder 5. This can be, in particular, a holding plate 2 according to Figure 4. Since most of the components of the device 20 have already been explained with reference to Figure 5, they will not be introduced again here.

[0109] The locking element 4 has an engagement element 10 on an edge section facing the holding plate receptacle 5. This engagement element is designed to engage with a recess and / or a projection in the holding plate. Specifically, for the holding plate shown in Figure 4, this means that the engagement element 10 comprises at least one projection that can engage with the recess in the holding plate 2, and / or that the engagement element 10 comprises at least one clamp that can engage around a projection in the holding plate 2. In the example shown, the engagement element 10 comprises a plurality of projections and clamps (one clamp and two projections). This pattern can thus be complementary to the key section 8 of the holding plate 2, which can accordingly comprise three recesses. This means that the number of projections and clamps corresponds in particular to the number of recesses and projections in the associated key sections 8 of the holding plate 2.The clamps can also nestle against a projection in the holding plate 2.

[0110] As shown in the figure, the engagement element 10 of the locking element 4 and the first key portion 8 of the retaining plate 2 engage with each other, so that the retaining plate 2 is held in the predetermined position. The engagement can be a positive fit. Here, the engagement between the engagement element 10 and the key portion 8 of the retaining plate 2 is also clearly visible. The projections of the engagement element 10 engage in the recesses of the retaining plate 2, and the clamps of the engagement element 10 encompass the projections in the key portion 8 of the retaining plate.

[0111] The locking hook 12 is locked to the locking hook bearing section 12a of the holding plate 2. This holds the locking element 4 in the closed position against the spring force of the spring element 3. In this context, the bearing element 16, which fixes the holding plate against movement perpendicular to the support surface of the holding plate receptacle 5, is also important. In other words, the holding plate 2 is held on the holding plate receptacle 5 by the bearing element 16 against the spring force (due to the locking between the locking element 4 and the holding plate 2 by the locking hook). The holding plate 2 can therefore not be lifted upwards away from the holding plate receptacle 5. The locking element 4 can be designed such that, in the closed position, an upper surface of the locking element 4 runs tangentially with a section of the holding plate receptacle 5.This allows the user to intuitively see that the retaining plate 2 is correctly positioned in the specified position. This ensures that the retaining plate 2, with its seal 15 around the opening 14, is correctly positioned in all three axes relative to the intake port of a vacuum cleaner, so that the dust-laden air is completely directed through the opening 14.

[0112] To release the locking connection between the locking hook 12 and the holding plate 2, the holding plate 2 can be moved on the holding plate holder 5 so that the locking hook 12 is released from its locking position. The locking hook 12 is then released and the spring force of the spring element 3 presses the locking element 4 into the open position. To enable this displacement, it is conceivable that the engagement between the engagement element 10 and the key section 8 of the holding plate is not a perfect form-fit, but rather allows freedom of movement for the holding plate. For this purpose, the projections and clamps of the engagement element 10 can, for example, leave a (small) distance between the recesses and projections in the key section 8 of the holding plate. It is also possible for the projections in the key section 8 to be elastic.The necessary displacement of the retaining plate 2 can also be achieved by such elasticity of the projections, for example, if the grip portion 18 of the retaining plate 2 is pulled with sufficient force. The necessary displacement can be less than 2 mm, in particular less than 1 mm.

[0113] The above statements were made for the first key section 8 of the holding plate 2, but also apply in the same way to the second key section 8. Likewise, in this described device 20, a holding plate 2 can be used which has holes as locking recesses (see Figure 3).

[0114] Finally, Figure 7 shows a vacuum cleaner 7 according to the present invention. The vacuum cleaner 7 comprises a housing 7a with a pivotable lid 6, which is provided for closing the dust collection chamber of the vacuum cleaner 7. This is shown in the open position (also called the service position), in which a dust collection chamber arranged inside the housing 7a is exposed. Located in the dust collection chamber is a vacuum cleaner filter bag 1 with a holding plate 2. The holding plate 2 is arranged on a holding plate receptacle 5 of the device 20. The device 20 is the previously described device for holding a vacuum cleaner filter bag in a vacuum cleaner. When the closing element 4 is in the open position, as shown in Figure 5, the closing element 4 projects upwards.This means that the lid 6 of the housing 7a cannot be closed because the locking element 4 prevents the lid 6 from pivoting completely, so that the lid 6 can lock with the rest of the housing 7a. The locking element 4 thus serves as a so-called suction lock. As previously explained, the locking element 4 remains in the open position if no vacuum cleaner filter bag 1 has been inserted into the stick vacuum cleaner 7 because the locking hook 12 cannot lock onto the holding plate 2 of the vacuum cleaner filter bag and the spring force of the spring element 3 presses the locking element into the open position. The housing 7a or the lid 6 therefore cannot be closed without a vacuum cleaner filter bag inserted.

[0115] Vacuuming is not possible with the housing 7a open (or incompletely closed) because the vacuum cleaner 7 draws ambient air into the fan through the open housing 7a and consequently fails to develop any suction power. Damage to the vacuum cleaner 7 or the fan caused by the suction of dust and dirt can be reliably prevented in this way because the vacuum cleaner cannot be used for vacuuming without the vacuum cleaner filter bag 1 inserted.

[0116] This shows the dual function of the locking element 4 on the device 20. It prevents possible damage to the vacuum cleaner 7 by ensuring that only correct / suitable vacuum cleaner filter bags are used, and also by ensuring that the vacuum cleaner 7 cannot be used without a vacuum cleaner filter bag inserted.

Claims

Claims 1 . Holding plate (2) for a vacuum cleaner filter bag (1), comprising: a locking recess (12a) which is designed to be locked with a locking hook (12), and a passage opening (14), wherein the holding plate (2) has a maximum width perpendicular to an insertion direction (E) of the holding plate (2) of between 55 mm and 94 mm, wherein a distance between the center point (M) of the passage opening (14) and a front edge (19) of the holding plate (2) in the insertion direction (E) is between 28 mm and 53 mm, and wherein the position of the locking recess (12a) fulfills one of the following criteria: a) the locking recess (12a) is located in an area which is arranged at a distance of between 34.5 mm and 51 mm around the center point (M) of the passage opening (14), wherein the area around the center point (M) of the passage opening (14) starting from an axis which is parallel to Insertion direction (E) passes through the center point (M) of the passage opening (14),in an angular range between 62° and 90°; b) the locking recess (12a) is located, as viewed from the center point (M) of the through-opening (14), in a region which is arranged at a distance of between 5 mm and 17 mm along the insertion direction (E), and at a distance of between 36 mm and 48 mm in a direction perpendicular to the insertion direction (E); c) the locking recess (12a) is located, as viewed from the center point (M) of the through-opening (14), in a region which is arranged at a distance of between 36 mm and 56 mm along the insertion direction (E), and at a distance of between 31 mm and 41 mm in a direction perpendicular to the insertion direction (E); d) a ratio between the distance between the center point (M) of the through-opening (14) and the front edge (19) of the holding plate (2) and the shortest distance between the center point (M) of the through-opening (14) and the locking recess (12a) is between 1.2 and 1.8,and an angle between the connecting line connecting the center point (M) of the through-opening (14) and the front edge (19) of the holding plate (2) and the connecting line connecting the center point (M) of the through-opening (14) and the locking recess (12a) along the shortest distance is between 65° and 85°., 2. Holding plate (2) according to claim 1, wherein the locking recess (12a) is designed in the form of a hole, in particular a through hole or a blind hole, wherein the hole forms an inner contour of the holding plate (2).

3. Holding plate (2) according to claim 1, wherein the locking recess (12a) is designed in the form of a recess in an outer contour of the holding plate.

4. Holding plate (2) according to one of the preceding claims, further comprising a further locking recess (12b) which is arranged such that the arrangement of the two locking recesses (12a, 12b) is symmetrical to an axis which optionally runs parallel to the insertion direction (E) through the center point (M) of the passage opening (14).

5. Holding plate (2) according to one of the preceding claims, comprising a first key portion (8) which is formed in one or the first region of the outer contour of the holding plate (2), wherein the first key portion (8) comprises a plurality of projections (8a) and recesses (8b) arranged between two adjacent projections (8a).

6. Holding plate (2) according to claim 5, wherein the first key portion (8) is located in a region which, viewed from the center of the through-opening (14), is arranged at a distance of between 36 mm and 56 mm along the insertion direction (E), and at a distance of between 31 mm and 41 mm in a direction perpendicular to the insertion direction (E).

7. Holding plate (2) according to claim 5 or 6, further comprising a second key portion (8) which is formed in a second region of the outer contour of the holding plate (2), wherein the second key portion (8) comprises a plurality of projections (8a) and recesses (8b) arranged between two adjacent projections (8a), and wherein the first region is opposite the second region with respect to an axis parallel to the insertion direction (E).

8. Holding plate (2) according to one of the preceding claims, wherein the one boundary of the locking recess comprises the same material as the rest of the holding plate (2), or wherein the locking recess (12a) or its boundary comprises a different material than the rest of the holding plate (2).

9. Device (20) for holding a vacuum cleaner filter bag (1) in a vacuum cleaner (7), the device (20) comprising: a holding plate receptacle (5) with a support surface, wherein the support surface is designed to receive a holding plate (2) according to one of the preceding claims, and a closing element (4) pivotable between an open position and a closed position, wherein the closing element (4) comprises a latching hook (12), wherein the latching hook (12) is designed to latch in the closed position of the closing element (4) on the latching recess (12a) of the holding plate (2) received on the holding plate receptacle (5), so that the closing element (4) is held in the closed position by the latching hook (12).

10. Device (20) according to claim 9, wherein the holding plate holder (5) further comprises a bearing element (16) which is designed to hold the holding plate (2) against a movement perpendicular to the support surface of the holding plate holder (5), and / or wherein the bearing element (16) is designed to hold the holding plate (2) against a lateral movement on the holding plate holder (5) parallel to the support surface.

11. Device (20) according to claim 9 or 10, further comprising a spring element (3) which exerts a spring force which presses the closing element (4) towards the open position.

12. Device (20) according to one of claims 9 to 11, wherein the holding plate receptacle (5) is designed to receive a holding plate (2) according to one of claims 5 to 7, and wherein the locking element (4) comprises on a side facing the holding plate receptacle (5) an engagement element (10) which is designed to engage with the first key portion (8) and / or second key portion (8) of the retaining plate (2).

13. Device (20) according to one of claims 9 to 12 for a holding plate (2) according to claim 4, further comprising a further residual hook (12) arranged in such a way that in the closed position of the locking element (4) it locks into the further locking recess (12b) of the holding plate (2).

14. Device (20) according to one of claims 9 to 13, further comprising a stop element (17) which is a part of the closing element (4) and is designed such that a stop of the holding plate (2) on the stop element (17) leads to a pivoting of the closing element (4) from the open position towards the closed position.

15. Vacuum cleaner (7) comprising a housing (7a) with a lid (6) and a device (20) according to one of claims 9 to 14, wherein the device (20) is arranged in a dust collection chamber of the vacuum cleaner (7), wherein the lid (6) is pivotally attached to the housing (7a) and is provided for closing the dust collection chamber, wherein the lid (6) of the housing (7a) is closable when the closing element (4) is in the closed position, and wherein the lid (6) of the housing (7a) is not closable when the closing element (4) is in the open position.

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