EP2025279B1 - Filter bag with retaining plate - Google Patents

Description

The invention relates to a filter bag with a holding plate according to the preamble of claim 1.

Filter bags of the type in question are known and find particular application in vacuum cleaners, more particularly in household vacuum cleaners, for the filtration of dust and dirt-laden suction air in vacuum cleaner operation. In the unloaded state, that is to say in the non-intake-air-inflicted state of the filter bag, a portion of the same can rest on the holding plate, in particular depending on the degree of filling of the filter bag, such that the inflow opening of the holding plate is at least partially covered. This state can also be present after the insertion of a new, unused bag that is still in an at least partially folded position. This can lead to a malfunction during commissioning of the filter bag receiving device, such as a vacuum cleaner.

From the EP 1 787 561 A1 a filter bag is known in which associated with the inlet opening in the interior of the bag, below the holding plate, a closure device is formed. This closure device can be moved from a closing position to an open position, wherein the displacement forcibly results when inserting the filter bag. In this case, the closure device can be acted upon by means of a bag region which is unconnected to the closure device.

In view of the described prior art, a technical problem is seen to design a filter bag of the type in question functionally reliable.

This object is solved by the subject matter of claim 1, wherein the portion is connected to a lever portion formed for manual operation, for setting up the filter bag in a state inserted into a filter bag chamber, under forced driving of the portion. It is a hand-setting, also outside the filter bag chamber, the filter bag by means of the lever portion allows.

About the intended lever portion of the portion of the filter bag is at least as spaced from the retaining plate that proper operation is secured. The partial area is displaced via the lever section at least into a position which properly permits the device to be put into operation, in particular the vacuum cleaner provided with the filter bag, wherein the partial area continues to be displaced beyond the lever section by the air flow acting on the filter bag during operation can be set up. In any case, by means of the lever section, a position of the bag portion which prevents the first inflow during startup is excluded. The subregion can also be designed such that an automatic setting up, in particular of the subregion of the filter bag, is achieved, for example in connection with an insertion of the filter bag into the chamber, which is achieved by suitable design measures in the chamber or else directly on the bag can be.

The proposed solution proves to be particularly advantageous in filter bags, the holding plate opening is closed by a flap in the unloaded state. By setting up in particular of the sub-region of the filter bag the flap is given space to aufzuschwenken in the operating state, which is not or at least not without setting up the sub-area in the sense of proper operation by resting the sub-area on the flap is possible.

In a further development of the subject invention it is provided that the lever portion is articulated to the support plate.

It is provided as a defined pivot axis for the lever portion. Further, the lever portion according to this embodiment is captively connected to the retaining plate of the filter bag. Further, the lever portion may be hinged to the support plate so that a forced installation is achieved by lever displacement in the course of insertion of the filter bag in the filter bag chamber. Further, the lever portion may be attached as a separate part via conventional linkages on the support plate, so on, for example, using a conventional hinge training. In addition, there is also the possibility, in particular when produced as a plastic injection molded retaining plates, the lever portion in one piece, form the same material with the holding plate and form the articulation, for example, by a material taper in the manner of a film hinge. Also, the articulation region between the lever portion and retaining plate may be formed in training as a plastic injection molded part by a second, in particular softer plastic component.

The lever portion is viewed in a preferred embodiment with the portion of the filter bag in a cross section through the holding plate by an angle of 10 degrees or more pivoted, so on at an angle sufficient spacing of the portion to the holding plate opening and on to a possible closure flap Holding plate offers. Any further possible further installation of the partial area can then be achieved by the air flow entering through the holding plate opening, this in the sense of an inflation of the filter bag. By setting up by means of the lever portion an initial ignition for setting up the entire filter bag is achieved in a figurative sense, by the holding plate opening backwards, that is, at least approximately exposed to the bag interior and an optionally provided closure flap an alternative space for pivoting in the direction of the open position is given.

In a further preferred embodiment of the subject invention, it is provided that the lever portion is biased in its erected position. According to this embodiment, an automatic setting is achieved by means of the lever portion. Constructive measures for setting up the lever section and over the filter bag subarea in the filter bag chamber can be dispensed with, if not mandatory. The entire erection mechanism is therefore part of the filter bag. Since such a filter bag is usually designed for single use, that is replaced after complete filling of the same against a new, unused filter bag, the bias of the lever portion may be designed so that this may only act once, namely the moment when the filter bag is first used in the unused state in the filter bag chamber. Accordingly, the bias may be adjusted so that the lever portion pivots only by an angle of, for example, 10 to 20 degrees and urges the filter bag portion of the system to the holding plate in a distanced position. For biasing an effective spring is disposed between the holding plate and the lever portion. This can be constructed, for example, by appropriate choice of material and structural design of the connection region between the lever portion and retaining plate alone from the hinge. This further example, by one-piece spraying of lever portion and retaining plate in the set-up. Alternatively, a conventional spring, for example, leg spring may be provided which acts at one end, for example against the retaining plate and the other end acts on the lever portion in the direction of the erecting position. The spring force is preferably adjusted so that on the one hand this is large enough to set up the lever portion and bag portion, but on the other hand so small that in the folded State of the filter bag, a stacking of several such bags can be achieved without the lever section swings open.

The lever portion preferably extends in particular in an initial position, that is, in a non-deployed position, viewed in a direction transverse to its pivot axis over a portion of the holding plate, and is accordingly in a basic position approximately parallel or including an acute angle of, for example, less than 10 degrees to the retaining plate. This proves to be advantageous in terms of the height of the filter bag folded in particular in the unused state. Thus, a plurality of filter bags designed in this way can be stacked for storage.

The lever portion is connected to enable the installation of the filter bag portion with this, for example, welded or glued to this, whereby a Zwangsmitnahme the sub-area is reached. In a preferred embodiment of the subject invention it is provided that the lever portion is formed as a bracket arms exhibiting bracket. However, it may also be a plate-shaped part, in addition to a rod-shaped part. In the embodiment of the lever portion as a bracket, the bracket arms are arranged spaced from each other in the direction of the pivot axis. Here, the bracket arms of the bracket can also be the placement of the spring elements.

Next alternatively to the bonding or welding of the lever portion with the portion of the latter but can also form a plug-in portion in which the lever portion engages, so on in the embodiment of the lever portion as a bracket, the bracket arms. The plug-in portion is in this case, for example, pocket-like shaped, wherein further the lever portion completely or alternatively only in sections in the plug-in, on Alternatively, in a plurality in the longitudinal extension of the hanger arms or the lever portion successively arranged Einsteckabschnitten rests.

A further advantageous embodiment provides that the lever portion can be latched relative to the holding plate in its erected position. This embodiment may be associated with the above-described spring preload of the lever portion, but may also be used without such. The latched installation position can be achieved manually by user intervention or alternatively, further also combinative thereto, by forced displacement of the lever portion in the course of insertion of the filter bag in the filter bag chamber. The latching takes place in a preferred embodiment in the region of the hinge connection of the lever portion on the holding plate, for example, by collapsing a lever-side cam in a holding plate-side recess.

Finally, it can be provided that the lever portion can be latched relative to the holding plate in its folded position. Such a latching can be solved structurally in the hinge area. According to this embodiment, the lever portion remains in the unloaded state of the filter bag, so continue the same in the unused state thereof, latched in the approximately parallel aligned position to the holding plate, in which the portion of the filter bag rests on the inside of the holding plate. This leads to a favorable overall height of the filter bag in the folded state. The safety catch is deliberately canceled, so in particular by user intervention, in addition, where appropriate, by constructive measures on the vacuum cleaner, further in the filter bag chamber, whereby a positive control of the lever portion can be achieved by lifting the safety catch in the set-up.

Fig. 1

in perspektivischer Darstellung einen stielgeführten Staubsauger mit einer Filterbeutelkammer zur Aufnahme eines erfindungsgemäßen Filterbeutels;

Fig. 2

die Draufsicht auf einen Filterbeutel der in Rede stehenden Art, die zusammengefaltete Stellung betreffend;

Fig. 3

den Schnitt gemäß der Linie III - III in Fig. 2;

Fig. 4

den Filterbeutel in perspektivischer Darstellung, die aufgestellte Stellung betreffend;

Fig. 5

eine Schnittdarstellung gemäß Fig. 3, jedoch die Stellung gemäß Fig. 4 betreffend;

Fig. 6

in perspektivischer Unteransicht eine Halteplatte eines Filterbeutels in einer zweiten Ausführungsform, bei in strichpunktierter Linienart wiedergegebenem Filterbeutel in der zusammengefalteten Stellung;

Fig. 7

eine der Fig. 6 entsprechende perspektivische Darstellung, jedoch die aufgestellte Stellung betreffend;

Fig. 8

die Herausvergrößerung des mit VIII bezeichneten Bereiches in Fig. 6;

Fig. 9

die Herausvergrößerung des mit IX in Fig. 7 bezeichneten Bereiches;

Fig. 10

eine weitere perspektivische Unteransicht gegen die Halteplatte, eine dritte Ausführungsform betreffend.

Below, the invention with reference to the accompanying drawings, which illustrates only exemplary embodiments, explained in more detail. It shows:

Fig. 1

a perspective view of a stalk-guided vacuum cleaner with a filter bag chamber for receiving a filter bag according to the invention;

Fig. 2

the top view of a filter bag of the type in question, the folded position concerning;

Fig. 3

the section according to the line III - III in Fig. 2 ;

Fig. 4

the filter bag in a perspective view, concerning the established position;

Fig. 5

a sectional view according to Fig. 3 , but the position according to Fig. 4 concerning;

Fig. 6

in a perspective bottom view of a holding plate of a filter bag in a second embodiment, in reproduced in dash-dotted line filter bag in the folded position;

Fig. 7

one of the Fig. 6 corresponding perspective view, but concerning the established position;

Fig. 8

the enlargement of the area designated VIII in Fig. 6 ;

Fig. 9

the enlargement of the with IX in Fig. 7 designated area;

Fig. 10

another perspective bottom view against the holding plate, relating to a third embodiment.

Shown and described is first with reference to FIG. 1 a vacuum cleaner 1, in particular household vacuum cleaner, which is designed as a hand-held handle device. This first comprises a base unit 2, with an electric motor, not shown, for a suction / blower unit. At the base unit 2 a provided for receiving the sucked up dust material filter bag chamber 3 is docked. This includes a filter bag 4.

The power supply of the integrated in the base unit 2 electric motor via an electric cable. 5

Next, the base unit 2 has a gooseneck-shaped extension, which extends over the region of the filter bag chamber 3. In the area of the free end, this extension forms a plug-in receptacle for a handle 6 of the vacuum cleaner 1. In the region of the free end of the stem 6, an actuating handle 7 is provided. This has a thumb-actuatable setting unit in the form of a slide switch, via which the power of the recorded in the base unit 2 electric motor is adjustable.

For tillage the base unit 2 is fluidly connected to a header 8. This may be a suction nozzle having a rotating brush.

The suction port of the attachment 8, not shown, is fluidly connected to the filter bag 4 accommodated in the filter bag chamber 3, for which purpose a flow channel (not shown) passes through the base device 2. At the end, this flow channel merges into a connection section.

The latter is placed in a, in a parting plane T between the filter bag chamber 3 and base unit 2 formed cassette holder. Plane offset this extends a prepared in the illustrated embodiment of a plastic material retaining plate 9 of the filter bag 4, which has associated with the connection portion of the suction line has a passage opening 10 for introducing the dust-laden suction air. On the holding plate 9, an air-permeable dust bag 12 is attached to the underside, that is, facing away from the base device-side receiving area. In the operating position of the filter bag 4 is in overhead position in the filter bag receptacle 3 a; Accordingly, in the suction operation is flowed through from below through the passage opening 10.

When not in operation, that is, in non-Saugluftbeaufschlagung, the filter bag 4, the passage opening 10 of the holding plate 9 bag inside facing covered by a flap 11. This is the underside of the retaining plate 9 hinged. The displacement of the closure flap 11 in the opening direction is effected by the Saugluftbeaufschlagung. The return to the closed position is spring assisted. According to this embodiment, the filter bag 4 is operable in overhead position.

The passage opening 10 and correspondingly also the closure flap 11 are deviating in plan from a circular shape, so on in about elongated tongue-like. The hinge axis x extends transversely to a longitudinal extension of the closure flap 11, and also transversely to a longitudinal extent of the holding plate 9. The hinge forming the hinge axis x is preferably formed by a corresponding material taper in the manner of a film hinge.

The spring loading of the closure flap 11 in the direction of the closure position is achieved by a spring, not shown, which acts on the flap inside the flap 11 facing the bag.

Due to the overhead arrangement in the vacuum cleaner 1 or in the filter bag chamber 3 results in the unloaded state, that is, when not operating the vacuum cleaner 1, a position of the filter bag 4 according to the representations in the Figures 2 and 3 , Especially when the filter bag 4 is not or only slightly filled with dust, moreover, especially in the unused new condition. As in particular from the sectional view in FIG. 3 to recognize, extends in this unloaded condition, a portion 13 of the dust bag 12 approximately adjacent to the support plate 9 adjacent or at a small distance to this, which can prevent the opening movement of the shutter 11 during operation of the vacuum cleaner 1. In order to allow the closure flap 11 to open unhindered, this portion 13 of the dust bag 12 is set up before the filter bag 4 is put into operation.

For this purpose, a lever portion 14 is provided, which in a first embodiment according to the representations in the FIGS. 1 to 5 spring assisted loaded in the installation position.

The lever portion 14 of the first embodiment is formed as a bracket 15, having mutually parallel bracket arms 16. The ends of the hanger arms 16 are attached via a hinge formation 17 on the support plate 9; this is in the region of a longitudinal edge of the retaining plate 9 extending transversely to the pivot axis x of the closing flap 11. The resulting hinge axis y of the lever section 14 extends correspondingly transversely to the hinge axis x of the closing flap 11.

The hinge formation 17 in the first embodiment is achieved in one-piece, material-uniform design of retaining plate 9 and bracket 15 by a material taper, wherein further production in the plastic injection molding method is preferred. Retaining plate 9 and bracket 15 are hereby made so that via the hinge formation 17 a Aufstellneigung the bracket 15 is achieved in an approximately vertical position to the holding plate plane. Accordingly, the hinge formation 17 forms a spring 18, which in the pivoted position of the bracket 15 as shown in FIG FIG. 3 a Aufstellfederkraft holds. The free end of the lever portion 14 and the bracket 15 is located in a wall outside of the dust bag 12, in particular in the portion 13, separately provided, pocket-like insertion portion 19 a.

In the FIG. 3 shown position of lever portion 14 and portion 13 of the dust bag 12 is used to illustrate the position of the portion 13 in the unloaded state, such as in the state as it is present to the user when removing a new filter bag 4 from a supply pack or the like. The spring force in the hinge formation 17 is released in this illustrated position. The drawing accordingly represents an intermediate position, after release of the spring force. The spring force can also be intentionally releasable, so for example. By locking the lever portion 14 in the pivoted position, which latch can be canceled, for example, when inserting the filter bag 4 in the chamber 3. Thus, for example, the lever portion 14 may be formed as a rocker, with a rocker leg, which cooperates with a trigger projection or the like in the chamber 3. Such a solution is conceivable without spring action.

The lever portion 14, according to the preferred here spring loading in the hinge formation 17 in case of elimination of the lever portion 14 restrained load (for example, by other resting, folded filter bag 4 in a reserve pack or the like) automatically in the set-up according to the representations in the FIGS. 4 and 5 ; This results in entraining the dust bag portion 13. It follows hereafter in the bag associated with the underside of the support plate 9 enough Room for unhindered installation of the closure flap 11 in the vacuum cleaner operation. The installation position of the lever portion 14 may be limited by stops. In the simplest embodiment, the raising movement of the lever portion 14 is determined solely by the spring force, which is no longer sufficient from a certain angle of the lever portion 14 to pivot this even further.

As further from the representation in FIG. 10 can recognize the lever portion 14 may alternatively be formed alone by a formed of a spring wire bracket 15, which spring wire with its free ends 20 underside of the support plate 9 support, so that the bracket 15 at the same time forms the spring 18.

In the FIGS. 6 to 9 another embodiment is shown. Again, the lever portion 14 is designed like a bow, so on in the form of a bow-shaped wire, the ends of the bail arms 16 axially forming in holding plate-side receiving projections 21 engages. The end portions 22 of the hanger arms 16 pass through the receiving projections 21, to which latter have aligned in Schwenkachsrichtung bores. The enforcement of the end portions 22 of the hanger arms 16 takes place from the inside to the outside, wherein the outside of the free ends 23 of the end portions 22 are angled perpendicular to the pivot axis y. These free ends 23 rest on the facing surface 24 of the respective receiving projection 21. In Verschwenkweg these free ends 23 an overflow section 25 is provided from the surface 24 uprising.

In the basic position, which of the folded position of the filter bag 4 as shown in FIG FIG. 6 corresponds, the free ends 23 of the bracket 15 are on one side to an associated edge of the respective overflow section 25 at. Accordingly, this basic position of the bracket 15 and the lever portion 14 and on this of the dust bag portion 13 is latched. To set up the portion 13 in the operating position is by user intervention, but possibly also by constructive means in the area of the filter bag chamber 3, an overflow of the overflow sections 25 through the free ends 23 of the bracket 15 is required. This overflow is correspondingly only volitional. This results in an erection of the lever portion 14 and the portion 13 according to the representations in the FIGS. 7 and 9 ,

LIST OF REFERENCE NUMBERS

1

vacuum cleaner

2

basic unit

3

Filter bag chamber

4

filter bag

5

electric cable

6

stalk

7

operating handle

8th

header

9

Retaining plate

10

Through opening

11

flap

12

anther

13

subregion

14

lever portion

15

hanger

16

bow arms

17

hinge training

18

feather

19

insertion section

20

free ends

21

receiving projections

22

end

23

free ends

24

area

25

Overflow portion

T

parting plane

x

Hinge axis flap

y

Hinge axle lever section

Claims (11)

1. Filter bag (4) comprising a retaining plate (9), at least a portion (13) of the filter bag (4) being able to rest on the retaining plate (9), characterised in that the portion (13) is connected to a lever part (14) shaped for manual operation, by means of which lever part positive driving of the portion (13) is achieved, for positioning the filter bag (4) in a state in which it is inserted into a filter bag chamber (3).
2. Filter bag according to claim 1, characterised in that the lever part (14) is articulated to the retaining plate (9).
3. Filter bag according to either of the preceding claims, characterised in that the lever part (14) can pivot together with the portion (13) through an angle of 10 degrees or more when viewed in a cross section through the retaining plate (9).
4. Filter bag according to any of the preceding claims, characterised in that the lever part (14) is biased into the installation position thereof.
5. Filter bag according to claim 4, characterised in that a spring (18) which acts between the retaining plate (9) and the lever part (14) is arranged to create the bias.
6. Filter bag according to any of the preceding claims, characterised in that the lever part (14) comprises a swivel axis (y), and in that the lever part (14) extends in a direction transverse to its swivel axis (y) over a portion of the retaining plate (9).
7. Filter bag according to any of the preceding claims, characterised in that the lever part (14) takes the form of a bracket (15) comprising bracket arms (16).
8. Filter bag according to claim 7, when dependent on claim 6, characterised in that the bracket arms (16) are spaced apart in the direction of the swivel axis (y).
9. Filter bag according to either claim 7 or claim 8, characterised in that a plug-in part (19) is formed on the portion (13) of the filter bag (4), in which plug-in part the bracket arms (16) engage.
10. Filter bag according to any of the preceding claims, characterised in that the lever part (14) can be locked relative to the retaining plate (9) in the installation position thereof.
11. Filter bag according to any of the preceding claims, characterised in that the lever part (14) can be locked relative to the retaining plate (9) when the filter bag (4) is in its folded-up position.

Images