ES2815569T3 - Dust filter bag for a vacuum cleaner as well as arrangement of a dust filter bag on a vacuum cleaner - Google Patents

Abstract

Dust filter bag (4) for a vacuum cleaner (1), especially for an electric motor-driven vacuum cleaner (1), possibly also for a vacuum cleaner (1) in the form of a self-moving floor cleaning device , with a retaining plate (11) to which a dust bag (12) is fixed, and which has an insertion hole (18), which preferably can be closed, for the dust-laden air flowing into a insertion direction (a) fundamentally perpendicular to an opening surface of the insertion orifice (18), being further configured against the insertion direction (a) of the dust-laden air, in front of a fixing surface (22) of the dust bag (4), on the retention plate (11), a lower clamping section (24) of the retention plate (11), which in a projection direction corresponding to the insertion direction (a) overlaps with a part (23) of the retaining plate (11), which forms the fixing surface (22) or is transformed into the same, remaining between the lower clamping section (24) and the part (23) of the retaining plate (11) an access space (25), characterized in that the fixing surface ( 22) of the retaining plate (11) extends as a whole in a plane (E) that forms an acute angle (α) with a plane (F) in which the lower clamping section (24) extends, in a cross section in which these planes are represented in a line.

Description

DESCRIPTION

Dust filter bag for a vacuum cleaner as well as arrangement of a dust filter bag on a vacuum cleaner

The invention relates to a dust filter bag for a vacuum cleaner, according to the characteristics of the preamble of claim 1.

It is desirable that the insertion of a particularly new and unused dust filter bag into the filter chamber of a vacuum cleaner, as well as preferably the removal of a specially used dust filter bag from the filter chamber can be carried out out with ease. The operation of the vacuum cleaner with the dust filter bag inserted must be ensured.

From EP 1607 034 A1 a holding plate is known in which the lower clamping section runs parallel to a clamping surface of the holding plate. With a view to introducing a registration projection between the lower clamping section and the part forming the clamping surface of the retaining plate a favorable design is sought.

On the basis of this basis, it is provided according to the invention that the clamping surface of the retaining plate extends completely in a plane forming an acute angle with a plane in which the lower clamping section extends in a cross section in the that these planes are represented in a line. The access space thus formed in the retaining plate thus offers a favorable area for the user to grasp the dust filter bag during insertion of it into the filter chamber or during its removal from the filter chamber. . The access space is formed in a hygienically favorable area of the retaining plate. The clamping of the retaining plate, for example for transporting the filled dust filter bag, can thus suitably occur in a spaced area in the insertion direction.

As a consequence of the mutually divergent arrangement of the lower clamping section and the part of the retaining plate which becomes the clamping surface, a change in the distance of the lower clamping section from the clamping surface occurs or with respect to the part of the retaining plate that becomes the fixing surface in the radial direction and / or in the perimeter direction. The mutually facing surfaces of the lower clamping section and the spaced portion of the retainer plate form an acute angle of up to 30 °, preferably 5 ° to 15 °.

The access space is configured, with reference to an axis that passes through an insertion hole preferably through the center, is configured radially open outwards, whereby, in a cross section, in which the fixing surface is represented as a line , the access space is formed by a radially outwardly open U-shaped area of the retaining plate. With regard to the dust filter bag, provision is made for this first of all for the holding section to coincide, in a projection direction corresponding to the insertion direction, with a part of the holding plate which forms the sealing surface. fixation or that is transformed into it, leaving an access space between the lower clamping section and the part of the retention plate.

The access space formed in the retaining plate provides a favorable area for the user to grasp the dust filter bag, insert it into the filter chamber or remove it from the filter chamber. The access space is formed in a hygienically favorable area of the retaining plate. Access to the retaining plate, for example to transport the filled dust filter bag, can occur in a spaced area in the insertion direction.

Furthermore, the access space is configured, relative to an axis passing through the insertion hole preferably through the center, radially outwardly open, whereby in a cross section in which the fixing surface is represented as a Line, the access space is formed by a radially outwardly open U-shaped area of the retainer plate.

The U-arm assigned here to an inflow side is formed by the lower clamping section, while the opposite U-arm is formed by the part of the retaining plate that forms the clamping surface or transforms into the clamping surface. fixation and by the part of the retaining plate which, with respect to the axis of the insertion hole, fits radially outwardly to the fixation surface. These U-shaped arms are preferably developed parallel to each other. An acute angle can also occur between these arms U of 1 to 30 °, preferably 1 to 10 °, whereby the access space can be widened both from the inside radially towards the outside and from the outside radially towards the inside. .

The opening surface of the insertion hole is preferably formed in the sealing zone that interacts with a lid or the like in the closing position of the insertion hole. Therefore, the insertion hole is preferably located in the sealing plane formed in the area of interaction between the cap and the retaining plate.

The insertion direction can also be equated to a straight line extending a center line of the suction / blowing tube and passing through the center of the insertion hole and extending into the dust bag. In this case, the closing cap is not taken into consideration. The actual insertion direction, also taking into account the influence of the flow through the closing cap, develops roughly, but not in a straight line.

The line representing the direction of insertion extends, with reference to a cut through the insertion hole, in which the line, as well as the plane of the seal, are represented as lines, essentially perpendicular to the plane of the seal, forming preferably an acute angle between 30 and 90 °, especially between 60 and 90 °.

In connection with the arrangement of the dust filter bag in the vacuum cleaner, the access space of the retaining plate is further utilized so that in the closing position of the closing lid the registration projection can be inserted into the space manhole with a U-shaped cross section and (also) open in the direction of the registration boss.

Through the registration projection, in interaction with the access space, an orientation-dependent positioning of the dust filter bag in the filter chamber is ensured. In addition, thanks to the interaction, the insertion of a dust filter bag in the filter chamber is guaranteed. Preferably, the registration projection is positioned, in the absence of a dust filter bag and therefore in the absence of an interaction with an access space of a retaining plate, against an area of the filter chamber and it blocks it, so that in a preferred embodiment it is not possible to close the filter chamber in this situation.

An additional support for the dust filter bag in the filter chamber can also be reached via the registration projection inserted into the filter chamber. In a preferred variant of embodiment, the registration projection also acts on the retaining plate so that it is pressed in the area of the access hole against the suction / blowing tube on the side of the vacuum cleaner so as to seal it.

Relative to a central axis of the access hole, the central axis which in a plan view of the access hole is represented as the center point, the lower clamping section overlaps in the projection direction along the direction of introduction, at least fundamentally, from the radially outer part, with at least one area of the adhesion of the dust bag on the retaining plate. As a result, there is a distancing of the dust bag from the lower clamping section, whereby the dust bag does not influence the access space, even independently of the degree of filling of the dust bag.

This also enables the access space to be used for hygienically favorable holding of the dust filter bag, especially in case of removal of the dust filter bag from the filter chamber.

With reference to the central axis of the access hole located radially outside the adhesion of the dust bag to the retaining plate, a part of the retaining plate preferably continues to extend in the fixing plane to support the dust bag, especially in the case of a reverse arrangement of the same in the filter chamber, in which the dust bag extends above the retaining plate.

Preferably, the lower clamping section is formed only through a part of the perimeter. Therefore, the lower clamping section preferably extends through one-tenth to one-fifth of the perimeter of the retainer plate in the area of the plane that receives the lower clamping section.

With reference to a central axis of the access hole, two opposite lower clamping sections are preferably formed for the corresponding configuration of two access spaces. These can be detected by the respective registration projections of the vacuum cleaner.

The registration lug is preferably rotatable about an axis of rotation, with the registration lug moving in the retracted position about the axis of rotation. In the position not influenced by the retaining plate or by the access space, the registration projection is preferably subjected to the force of a spring that moves it to a basic locking position, in which, in the absence of retaining plate or dust filter bag, the registration protrusion places against and blocks a section of the filter chamber or vacuum cleaner. Only an introduction of the registration projection into the access space of an inserted retaining plate causes a rotary movement of the registration projection to a position that allows the closure of the filter chamber.

The registration projection is inserted into the access space in an entry direction transverse to the extent of the lower clamping section. In the case of a substantially U-shaped cross-sectional configuration of the access space, the insertion of the registration projection into the access space preferably occurs transversely to the U-shaped cross section.

During the interaction of the registration boss with the retaining plate, when closing the closure cover, the registration protrusion ensures a defined positioning of a seal of the retaining plate against the suction / blow-off tube or a surface of the filter chamber floor. During this process, as well as preferably in the final closing position of the closure cap, the projection of the register applies a load to the retaining plate so that its sealing area, for example, in the form of an annular collar provided with a sealing lip, is trapped in the sealing seat and held in this position.

Preferably, a blocking element is provided in the filter chamber. This interacts with an assignable registration protrusion when attempting to move the closure cap to the sealing position if the dust filter bag is not inserted or is not properly inserted. In this case, the registration projection does not rotate when entering the access space, but rather collides with the locking element that prevents a further rotation of the closing cap.

The locking element can be a rib or a bulge. A blocking bag is preferred in which the registration protrusion is submerged with a partial zone.

Two registration projections are preferably provided. Each of them is preferably assigned a locking element.

The registration projections are fixed on the closure cap preferably so that they can rotate independently of each other. Rotational displacement of one registration protrusion does not necessarily lead to a displacement of the other registration protrusion solely due to its movement.

Therefore, the retainer plate can preferably be moved by means of one or more registration projections to the sealing seat and / or fixed in its sealing seat.

The ranges or ranges of values or multiple ranges specified above and below include, as far as disclosure is concerned, all values in between with respect to disclosure, especially in 1/10 steps of the disclosure. respective dimension, in your case even dimensionless. The specification of 1 to 30 °, for example, also includes the disclosure of 1.1 to 30 °, 1 to 29.9 °, 4.2 to 21.7 °, etc., the disclosure of up to 30 also includes the reveal up to 29.9 °, up to 17.4 °, etc., reveal from 30 to 90 °, reveal from 30 to 89.9 °, 30.1 to 90 °, 37.4 to 58.7 ° , the reveal from 1/10 to 1/5, and also the reveal from 10/100 to 19/100, 11/100 to 20/100, 14/100 to 18/100 etc. This disclosure can serve, on the one hand, to delimit a specified range limit from below and / or above, but alternatively or additionally to disclose one or more singular values of a respectively specified range.

The invention is explained below in view of the attached drawing, which, however, only represents an embodiment. In the drawing it is shown in the:

Figure 1 in a perspective representation, a vacuum cleaner in the form of a handheld electric vacuum cleaner;

Figure 2 is a partially cutaway perspective representation, the area of a filter chamber of the vacuum cleaner with a closing cover having registration projections, relative to a locked position when the dust filter bag is missing;

Figure 3 another partially cutaway perspective representation of the filtering chamber with the closing lid open and the dust filter bag inserted;

Figure 4 a vertical section through the arrangement according to figure 3;

Figure 5 is another partially cut perspective representation, the area of the filtering chamber relative to an intermediate position during the closing process of the closing lid;

Figure 6 the closed position of the closing cap;

Figure 7 the section according to the zone VII of figure 6;

Figure 8 the retention plate of the dust filter bag in a perspective representation;

Figure 9 the retaining plate in a view according to arrow IX in Figure 8;

Figure 10 the view against the retaining plate according to arrow X in Figure 8;

Figure 11 another perspective representation of the retaining plate with a view on a connection side thereof; Figure 12 the view on the retention plate;

Figure 13 the view from below against the retainer plate;

FIG. 14 is the view according to arrow XIV in FIG. 10;

FIG. 15 is a representation corresponding to FIG. 3, relating to an alternative embodiment of the retaining plate;

Figure 16 an embodiment of the dust filter bag in a side view;

FIG. 17 the dust filter bag according to FIG. 16 in the inserted state in the filtering chamber, relative to the closing position of the closing lid;

Figure 18 shows a representation corresponding to Figure 17, relative to a closing position of the closing lid with the dust filter bag not inserted.

With reference to figure 1, a vacuum cleaner 1 in the form of a handheld electric vacuum cleaner with a handle is represented and described first, with a base housing 2 containing a motor / blower unit not shown, to which is connected a chamber of filter 3 that can be opened for a dust filter bag 4.

To operate the vacuum cleaner 1, a handle 5 is attached to the base housing 2. At the end, it has a handle 6 fitted with a switch 7 for electrical start-up, as well as for controlling the vacuum cleaner 1. The supply Electrical is produced through an electrical cable 8, which enters the handle 6.

The soil treatment is carried out in the illustrated embodiment via a soil nozzle 9. It is connected rheotechnically and, possibly also electrically, to the base casing 2 and to the motor and blower unit arranged therein, through a coupling 10 not shown in detail.

During the operation of the vacuum cleaner 1 the dust filter bag 4 is held in the filter chamber 3. The dust filter bag 4 has a dust bag 12 fixed on a retaining plate 11. The dust bag 12 is preferably a non-woven fabric bag.

The filter chamber 3 can be opened to expose the dust filter bag 4, especially to allow its replacement. To this end, a part of the filter chamber 3 is designed as a flap-shaped closure cap 13, which can be rotated around a rotational axis x in front of the fixed part of the filter chamber 3.

In figure 2 the closing cap 13 is shown in a locking position during a closing movement of the cap.

In the filtering chamber 3 a suction passage hole 14 is configured, through which the dirt that has been sucked up during operation is introduced into the dust filter bag 4 located in the filtering chamber 3. Depending on the respective Vacuum cleaner design 1, dust can be blown or suction into the dust filter 4.

In the case of the filtering chamber 3, it is preferably a chamber which, during the use of the vacuum cleaner 1, can be arranged practically vertically or at an acute angle with respect to a vertical in terms of its longitudinal extension, which here it is assumed in the direction of the visible surface of the floor 16 with respect to the other surface located above not shown.

On the inside face, registration projections 15 are arranged on the closing cover 13. Preferably, two registration projections 15 are provided at a distance from each other in the direction of the extension of the axis of rotation x.

Each of the registration projections 15 can be arranged, as shown in FIG. 2, on the inner face of the closure cap 13. With special preference, each registration projection 15 is pivotally arranged in the closure cap. 13, an axis of rotation y of each registration projection 15 preferably developing parallel or at least approximately parallel to the axis of rotation x of the closure cap 13.

The registration projections 15 are arranged so that they can rotate independently about the respective axis of rotation. Rotation of one registration protrusion 15 does not necessarily cause rotation of the other registration protrusion 15.

This can be achieved as a consequence of an individual configuration of the registration lugs 15. The two registration lugs 15 can also be preconfigured to improve mounting, for example by creating a connection between the registration lugs, said connection allowing rotation. independent of register bosses 15.

Furthermore, each registration boss 15 can be prestressed at a registration position. For this purpose, each registration projection 15 is preferably assigned a spring, for example an arm spring, which acts on the registration projection 15 in a rotational position preferably limited by a stop, in which, without further measures In addition, the registration projection 15 engages a locking element formed in the bottom surface 16 of the filter chamber 3 upon an attempt to close the closing lid 13, blocking it.

The locking element may be a lip or a projection for possible interaction with the assignable registration projection 15. The locking element is preferably a locking bag 17 that extends below the bottom surface 16 and opens in its plane (see also FIG. 18).

Each registration projection 15 is assigned a locking element, especially a locking bag 17.

The registration position represented in figure 2 therefore causes that, assuming that the dust filter bag 4 has not been inserted, the registration projection 15 interacts with the blocking bag 17 in such a way as to prevent a closing of the closing cap 13 due to blocking. Using electrical and / or mechanical elements, improper closing of the filtering chamber 3 can lead to the vacuum cleaner 1 not being able to start.

In order to be able to move the closing lid 13 to the closing position of the filtering chamber 3, it is a prerequisite that the registration projections 15 deflect, overcoming the force of the spring acting on them, so as to prevent immersion in the bags. lock 17.

This deflection of the registration projections 15 occurs as a consequence of the area of the retaining plate 11 with the inserted dust filter bag 4.

Only the retaining plate 11 of the dust filter bag 4 is primarily depicted in the illustrations. The dust bag 12 attached to the retaining plate 11 is only hinted at and, as can be seen, not fully shown due to the lines of rupture.

In the exemplary embodiment, and preferably in the region of a fixing plane E for the dust bag 12, the retaining plate 11 is configured as a grid. The retainer plate 11 can be manufactured as an injection molded plastic part.

The retention plate 11 has an insertion hole 18 surrounded by a collar 19 that penetrates into the interior of the dust bag 12. The insertion hole 18 is closed by means of a closure piece 20 as a flap, especially in Vacuum 1 off state, that is, when the suction air flow is not applied. The closure piece 20 can rotate about an axis, which preferably extends parallel or at least approximately parallel to the axis of rotation x of the closure cap 13, from a closing position of the insertion hole to an opening position. , the closure piece 20 moving in this opening position towards the interior of the bag (compare in this regard figure 7).

The movement of the closing piece 20 towards the open position during the operation of the vacuum cleaner 1 preferably occurs only as a consequence of the suction air current acting on it. An auxiliary opening element can also be provided which mechanically acts on the closure piece 20 and which promotes the opening process.

As indicated by the dotted line 21, which represents an outer connection contour between the dust bag 12 and the retaining plate 11, the retaining plate 11 protrudes laterally from the dust bag 12, here in the width extension filter chamber 3.

Preferably, the retaining plate 11 is configured in the part 23 that protrudes from the dust bag 12, preferably also in the remainder, like a grid, so that a lower support of the dust bag 12 can be achieved that fills up during operation of the vacuum cleaner 1, allowing this part 23 of the retaining plate 11, which receives the fixing plane E from the upper part, thanks to the grid-shaped structure, the passage of air that, in depending on the type of operation of the vacuum cleaner 1, it is removed from the dust bag 12 by suction or is removed from the dust bag 12 by blowing.

Assigned to the respective grid-like structured part 23 of the retaining plate 11, a lower clamping section 24 is configured on the retaining plate 11. Preferably two lower clamping sections 24 are configured on a base body of the plate retainer 11, which simultaneously provides the attachment surface 22 for the dust bag 12, as well as the grid-shaped structured parts 23.

The clamping sections overlap, at least partially, in a projection in the direction of an insert (compare arrow a in Figure 7) of the powder-laden air flow in the powder bag 12 with the respectively associated portion 23 of the retaining plate 11, which becomes the clamping surface 22, provided between the lower clamping section 24 and the part 23 of the retaining plate assigned a distance considered in the insertion direction a.

Each lower clamp section 24 extends essentially over through one fifth of the perimeter of the retainer plate 11, especially the perimeter of the base body of the retainer plate 11. Furthermore, each lower clamp section 24 extends primarily from an edge of the retaining plate, which develops approximately parallel to the hinge axis of the closure piece 20 through approximately one third to one half of the length of the narrow side considered transversely to the longitudinal extension of the retainer plate 11 (compare dimension L in figure 10).

In a cross section through the area of the retaining plate 11 that houses the lower clamping section 24, the lower clamping section 24, the grid-shaped part 23 as well as the base body section of the clamping plate. retention 11 facing towards it constitute a U-shaped access space 25. This space is open on both sides in the longitudinal extension of the lower clamping section 24, that is, in the extension of the shortest measurement L of the shorter retaining plate, as well as towards the side opposite the base body of the retaining plate, that is, radially outward with reference to a central axis z passing through the insertion hole 18.

The mutually oriented surfaces of the lower clamping section 24 (plane F) and retaining plate part 23 (plane E) form an acute angle to each other of about 5 to 10 ° in the longitudinal extension of the lower clamping section 24, the distance being uniformly reduced in the direction of the section of the part 23 of the retainer plate that extends beyond the lower clamping section 24.

Correspondingly, a bearing surface of the lower clamping section 24 is developed oriented towards the part 23 of the retaining plate at the aforementioned angle towards the clamping surface 22 for the dust bag 12.

The oppositely arranged insert holes 25 can be advantageously used for the extraction and, moreover, especially for the transport of a dust filter bag 4, in particular a filled dust filter bag 4, for which the user who carries the retaining plate 11, for example, with two fingers, it inserts into the access spaces 25. In this case, there is no contact with the wall of the dust bag which, due to the part 23 of the plate structured retention as a filter, it is kept at a distance from the access spaces 25.

The lower clamping sections 24 are further positioned so that, in the insertion state of the dust filter bag 4 into the filter chamber 3, they cover the blocking bags 17 on the chamber side (compare FIG. 5).

The retaining plate 11 of the dust filter bag 4 is introduced into the filtering chamber 3 so that a perimeter sealing collar 26 of the retaining plate 11, which rotates at the bottom, that is to say, which is opposite to the necklace 19, surrounds a connection collar 27 of a suction / blowing tube 32 located on the side of the apparatus and penetrating the filtering chamber 3. The suction / blowing tube 32 is completely configured at the end of a suction channel 28 running through base casing 2.

The sealing collar 26 of the retaining plate 11 is further provided with a perimeter sealing lip 29 which preferably protrudes radially inward from a perimeter edge of the sealing collar 26 for interaction with the connecting collar 27.

Preferably, the retaining plate 11 is first, after insertion of the dust filter bag 4 by the user, in a pre-assembly position (cf. FIG. 4).

With the movement of the closing cover 13 in the direction of the closed position of the filtering chamber 3, the registration projections 15 enter the access spaces 25 on the side of the retaining plate, bearing respectively on the oriented bearing surface towards the part 23 of the retaining plate of the lower clamping section 24. This causes a deflection of the registration projections 15 against the force of the spring acting on them.

With a new pivotal movement of the closure cap 13 to the closed position, the registration projections 15 slide through these bearing surfaces of the lower clamping sections 24, penetrating more and more into the respective access space 25 .

The pivotal movement of the registration projections 15 against the force of the spring is preferably limited by a stop (stop projection 35), so that with the full movement of the closure cap 13 to the closed position according to FIG. 6 , a component of force acts on the lower clamping sections 24 through the registration projections 15 for (further) displacement of the retainer plate 11 to the sealing adjustment position according to Figure 7. The basic horizontal orientation of the The sealing lip 29 changes in the event of an interaction with the outer surface of the connecting collar 27, the sealing lip 29 finally adjusting to this outer surface in a bent manner.

The retaining plate 11 is supported at the same time by the bottom surface 16.

The sealing of the connection collar 27 against the bottom surface 16 of the filter chamber is achieved by a section of the connection collar 27 acting from below against the bottom of the filter chamber, this section being molded, for example, as 2-component soft component or surrounding the connecting collar 27 as a separately mounted gasket.

For the insertion of the retention plate 11 in the correct position, 16 orientation projections 30 in the shape of a web are provided on the bottom surface, which engage in orientation grooves 31 formed in the part 23 of the retention plate structured as a rack.

Projections can also be configured on the retaining plate 11 that interact with the grooves and / or recesses in the receiving space.

Figure 15 shows an embodiment of the retainer plate 11 in which the portion 23 of the retainer plate is configured as a closed flat surface (however, this surface can be perforated, for example, to save material ), with a rear clamping area of the retaining plate 33 having a width greater than the distance between the edges of the orientation projections 30. The remaining area of the part 23 of the retaining plate is provided with a corresponding width at this distance or less than it.

This also allows a correct (intuitive) positioning of the retainer plate 11 in the filter chamber 3. A retainer plate 11 inserted incorrectly with a 180 ° turn cannot be positioned as it slides forward due to the surface inclination of the bottom surface 16. In the correct insertion position, the retaining plate 11 rests with its rear clamping area 33 on the orientation projections 30.

Instead of the locking pockets 17 on the bottom surface side, locking ribs may also be provided projecting upward from the bottom surface 16, against which the registration projections 15 are positioned to lock them when the bag checks. dust filter 4 is not inserted. With the dust filter bag 4 inserted, the locking ribs are housed in bags or the like configured below the lower clamping sections 24.

The dust bag 12 can also be compactly folded at the factory into pleats or roll (compare figure 16). The compact layer is secured by means of one or more, especially two strips of material 34 in the form of a banner, which surround the dust bag 12 and the retaining plate 11 at least partially. The strip of material 34 can be a strip of paper.

The strip of material 34 encompasses the access space 25.

In the course of the closing process of the closure cap 13, the tip of the registration protrusion 15 first conforms to the surface of the strip of material 34. As the registration protrusion 15 plunges more and more into the space of access 25, the strip of material 34 is excessively twisted until it finally breaks as intended.

As a consequence of the closing movement of the lid, the fixing effect of the material strip or strips 34 is canceled, so that during the operation of the vacuum cleaner 1 the dust bag 12, promoted by the negative pressure effect on the wall of the dust bag, adopts its size and final position unfolded / unrolled.

List of references:

1 vacuum cleaner

2 Base case

3 Filtering chamber

4 Dust filter bag

5 Handle

6 Handle

7 Switch

8 Electric cable

9 Floor nozzle

10 Coupling

11 Retaining plate

12 Dust bag

13 End cap

14 Suction passage port 15 Registration projection

16 Bottom surface

17 Lock bag

18 Insert hole

19 Necklace

20 Closing piece

21 Line

22 Fixing surface

23 Part

24 Lower clamping section 25 Access space

26 Sealing Collar

27 Connecting collar

28 Suction channel

29 Sealing lip

30 Orientation boss

31 Orientation slot 32 Suction / blow tube 33 Rear access area 34 Material strip

35 Stop protrusion

a Direction of insertion

y Axis of rotation

x axis of rotation

z Central axis

E Fixing plane F Plane

L Extension

a Angle

Claims (5)

1. Dust filter bag (4) for a vacuum cleaner (1), in particular for an electric motor-driven vacuum cleaner (1), possibly also for a vacuum cleaner (1) in the form of a floor cleaning device of automatic movement, with a retaining plate (11) to which a dust bag (12) is attached, and which has an insertion hole (18), preferably closable, for flowing dust-laden air in an insertion direction (a) fundamentally perpendicular to an opening surface of the insertion hole (18), being further configured against the insertion direction (a) of the dust-laden air, in front of a fixing surface (22) of the dust bag (4), on the retention plate (11), a lower clamping section (24) of the retention plate (11), which in a projection direction corresponding to the insertion direction (a) overlaps with a part (23) of the retaining plate (11), which forms the fixing surface ion (22) or is transformed into it, leaving between the lower clamping section (24) and the part (23) of the retaining plate (11) an access space (25), characterized in that the clamping surface (22) of the retaining plate (11) extends as a whole in a plane (E) that forms an acute angle (a) with a plane (F) in which the lower clamping section (24) extends, in a cross section in which these planes are represented in a line. Dust filter bag according to claim 1, characterized in that, with reference to a central axis (z) of the insertion hole (18), the lower clamping section (24) overlaps in the projection direction a part (23) of the retention plate (11) existing at least radially outside a zone of adherence of the dust bag (12) to the retention plate (11). Dust filter bag according to any one of the preceding claims, characterized in that the distance in the projection direction changes in the radial direction and / or in the perimeter direction. Dust filter bag according to any one of the preceding claims, characterized in that a lower clamping section (24) is configured through a part of the perimeter and / or that they are preferably configured, in relation to a central axis ( z) of the insertion hole (18), two opposite lower clamping sections (24). Dust filter bag according to any one of the preceding claims, characterized in that, in relation to a central axis (z) of the insertion hole (18), two opposite lower clamping sections (24) are configured.