DE102008046200A1 - Filter bag for household-vacuum cleaner, has retaining plate with contact surface, and locking cap opened in interior of bag, where flow collar is formed on retaining plate and extends into inner side of retaining plate and to locking cap - Google Patents

Abstract

The bag (4) has a retaining plate (9) with a contact surface, and a locking cap (11) opened in an interior of the bag. A flow collar (17) is formed on the retaining plate, and extends into an inner side of the retaining plate and to the locking cap. The flow collar exhibits a vertical height, which corresponds to a vertical opening height of the locking cap during the opening of the locking cap from 5 degree to 60 degree. A carrier element is connected with the retaining plate. The carrier element is fastened within a region of a bag fixing plane at the retaining plate.

Description

The Invention relates to a filter bag for a vacuum cleaner, with a retaining plate and a flap that opens into the interior of the filter bag opens, wherein the holding plate has a connection surface having.

filter bag the type in question are known. Their filling opening is by one, for example, alone by the influx The particles afflicted air in suction in the open position held flap closed, including, for example, further the closure flap spring-biased in the closed position is.

in the With regard to the known prior art, the technical Problem, a filter bag of the type in question in terms of Functional safety, in particular with regard to a proper Further develop closure of the holding plate opening.

These The problem is first and foremost through the The subject matter of claim 1 solved, where it is turned off is that formed on the retaining plate, a flow collar is, the inside of the plate and surrounding the flap extends into the interior of the filter bag. Accordingly surrounds the provided flow collar at the same time through the flap to be closed holding plate opening. Especially in filter bags, in overhead position in vacuum cleaners are held, the problem arises that during Closing the shutter immediately after turning off of the vacuum cleaner particles in the gap between the flap and Affix retaining plate, which in particular the complete Closing the flap prevents. Subsequently may be due to the vertical overhead arrangement of Filter bag and thus lying below retaining plate opening Trickle out the suction material. This adverse effect is due to the Anord tion of Flow collar counteracted. So can in Working position no smaller particles, further also optionally Activated carbon particles get caught between retaining plate and closing flap. The flow collar forms together with the turn off the vacuum cleaner closing flap a reduced Radial gap, which also increases the flow velocity even with a fully filled filter bag or at high pressure loss the filter bag provides. As a result, the remaining gap is blown out. A jamming or leakage of suction or activated carbon will also thereby avoided. Next outsourced due to the overhead arrangement the filter bag heavy suction material, especially in the lower part, associated with the holding plate in the vicinity of the inlet opening at. The flow collar prevents lateral entry into the inlet at low flow velocities. Furthermore, the flow collar supports downward for retaining plate opening derived particles from which not from the residual air flow within the filter bag immediately after Shut down the vacuum cleaner to be detected. In addition, through the Arrangement of the flow collar the incoming air flow targeted directed into the filter bag, which further a direct Avoid flow of the inner filter walls can be.

in the Further features are described, preferably in combination have meaning with the features of claim 1, but in principle also with only some features of claim 1 or alone meaning can have.

So is in an advantageous development of the subject invention provided that the flow collar is an extension perpendicular has the contact surface of the holding plate. The flow collar extends from the plane pointing into the filter bag interior vertically surrounding to the shutter, forms accordingly in the broader sense, an extension of the front of the filter bag in the vacuum cleaner formed flow channel, where at weiter the vertical extent of the flow collar is chosen so that a particular vertical distance given to the filter bag wall, which is a multiple of the vertical Extent dimension of the flow collar corresponds. Next alternatively but also in combination can, in particular in an embodiment of the connection surface as a connection plane, the flow collar in cross-section perpendicular to a connection surface vertical the retaining plate also an acute angle to the pad include, in particular an angle of 1 to 30 °, preferably 1 to 15 °. Such a collar alignment can be provided all-round as well as only partially, this further optionally in conjunction with a partial vertical orientation.

The vertical height of the flow collar is further chosen so that these a vertical opening height the flap between the flap seat and freely rising flap end with an opening of the flap from 5 ° to 60 °, further for example 7 °, 12 °, 27 ° or 31 °, in addition, every angle between 5 ° and 60 °, corresponds. This is how the flap appears in a preferred embodiment only when exceeded a predetermined opening angle at least partially from the flow collar enclosed area, which predetermined opening angle to the Mindestöffnungsmaß full air flow of the flap corresponds.

The flap has a folding axis on, so further preferably in the region of a narrow side of the closure flap. In this regard, it is further preferred that the flow collar, in any case, surrounds the closure flap opposite the flap axis, so on, correspondingly surrounding the free flap flap section opposite the flap axis. Thus, in this regard, it is further provided that the flow collar surrounds the closure flap on three sides, in particular on three sides along two sides oriented transversely to the folding axis and also assigned to the side opposite the folding axis. In this regard, it is preferred that the flow collar surrounds the closure flap with the exception of the edge region associated with the flap axis. Even a flap completely surrounding the configuration of the flow collar is quite possible.

Of the Flow collar can also cylinder-like, the flap be designed surrounding, but beyond tulle-like with different, vertical extensions. So the flow collar can be viewed further over the circumference have repetitive vertical extent differences, so on, for example, in waveform. Preferred in this regard is a Embodiment in which the vertical extension with respect of the folding axis opposite edge region largest is. From this area of greatest vertical extent Starting from the flow collar, the flow collar height drops preferably in the direction of the opposite folding axis continuously from, this further, if necessary, except for a vertical Flow collar height of less than one millimeter. Next, the largest vertical extension can also assigned to one of the folding axis opposite corner area be provided the cap. The execution of the Flow collar has a positive effect on one Vortex formation of the air flowing into the filter bag out. For this purpose, a curved contour of the flow collar useful, such that the lateral flanks of the flow collar, which run parallel to the flap geometrically clear higher than the proportion of the flow collar, which is in the direct flow direction. A harmonious running Ausströmkontur prevents adverse stalls. The design of the flow collar with respect to the geometric Ratio between the length along the flow direction and opposite to the direction of flow also affects to the flow shape inside the filter bag. In this context, a parallel course is the opposite Kragenab sections preferred. Alternatively, it is a divergent course the sections provided in the flow direction.

Around a smallest possible frontal area in the direction of action the closure flap to provide, is provided in a development, that is the cross-section, that is the wall thickness of the flow collar in any case, over a partial area of the vertical height reduced with increasing distance to the holding plate. hereby There is still a risk of jamming of granular media between Collar inside wall and flap reduced. The reduction The wall thickness can here continuously with increasing distance to the Holding plate can be reached, up to a lip-like Ausspitzung the free edge.

moreover the flow collar can on the inside a to the edge contour the flap have sloping slope, in addition, in a development also the seat of the flap can form in the closed position. If necessary, this is also the edge contour of the flap adjusted beveled.

Of the Filter bag is located in the area of one of the pad Bag mounting plane supported on the support plate, such as in embodiment of the holding plate made of a hard plastic with this welded or glued. This bag attachment plane extends in a configuration plane parallel to the preferred Connection level of the holding plate, in which latter the fluid Connection of the filter bag to the device-side flow channel to charge the filter bag. In an alternative Embodiment, the bag attachment level extends between Filter bag and holding plate in a cross section perpendicular to Connecting surface of the holding plate at an acute angle to the connection surface. In this regard, is in example an angle of 5 to 45 °, preferably an angle of 10 to 30 ° selected.

Independently from the orientation of the bag attachment level is in a development of the subject invention provided that the flow collar from the pad over the bag attachment plane extends to the inside of the filter bag. Such is a directed Flow of particulate air into the interior of the Reached filter bag. The attachment level is therefore not directly acted upon by the incoming air flow. The supernatant of the Flow collar beyond the mounting plane addition is about 0.2 to 0.7 times the vertical height the flow collar starting from the pad.

On the inside of the holding plate, ie, pointing in the direction of the filter bag interior, a retaining plate wall surrounding the closing flap and the flow collar is formed. This results in an at least partially circumferential trench between flow collar and Halteplattenwan tion, which is achieved by a lateral spacing of the Halteplattenwandung to the flow collar. This distance is further selected so that, in particular in an overhead position of the filter bag in the operating position, particles taken up in the resulting trench in the filter bag can settle, and this in particular in the non-activated state of the vacuum cleaner.

Of the Distance between retaining plate wall and flow collar, d. H. further, the resulting trench is in a development on the circulation length of the flow collar is the same. alternative can also be about the orbital length of the flow collar the gap have different widths, this further optionally depending on the vertical extension length the associated flow collar portion.

When advantageous proves further that the Halteplattenwandung itself transverse to the plane of extension of the retaining plate parallel to the flow collar extends, resulting in the between Halteplattenwandung and flow collar resulting trench via its perpendicular to the holding plate plane considered height with the same width. alternative the retaining plate wall can also be so relative to the flow collar be aligned, that the formed ditch to the free side out, d. H. turned towards the inside of the bag.

moreover it is provided that at the end flap facing away from the closure flap the retaining plate wall is an outwardly extending, circumferential Bag fastening collar connects. This extends in the bag attachment plane. In a training this can Bag attachment plane formed by the bag attachment collar, in a cross section parallel below the opening plane of the flow collar.

In a development of the subject invention, the closure flap is spring-loaded in its closed position. For this purpose, for example, a thigh or wire bow spring is provided, which is held on the holding plate or on the Halteplattenwandung and acting on the interior of the bag facing surface of the closure flap. In a further preferred embodiment, a spring escape space is formed in the closure flap, starting from the spring-loaded side. This can be on the opposite side of the Federbeaufschlagungsseite the closure flap, that is, further facing the flow in the form of a flap-side increase. At least part of the spring section acted upon by the closing flap enters this escape space, so that a descent of this spring section is made possible below the bag flap closing plane on the inside of the bag. This is particularly useful in an exemplary leaf spring design. In this context, further proves to be advantageous if the spring is a flat spring, with a curvature transverse to its longitudinal extent. According to this embodiment, the closure flap is subject to a raid effect in the course of the displacement in the spring-assisted closure position. It is such a closure for a filter bag specified, which combines a service closure and a hygiene closure. In order to ensure the discharge of dust when the device is switched off, the closure flap, working as a service seal, must have a high sealing effect. This also means that the closure flap must be pressed with a corresponding force in the sealing seat. In order to minimize pressure losses and at the same time to achieve a good sealing effect, a special spring characteristic is provided. Thus, the closure flap is pressed into the sealing seat with a force that is sufficiently high for the sealing effect. Consequently, an increased force is initially necessary for the beginning of the opening process. After the closure flap has exceeded a predefined opening travel, the spring characteristic changes almost abruptly. As a result, the force required to open is significantly reduced. According to the proposed embodiment of the spring as a flat spring with a curvature provided transversely to its longitudinal extent, a spring characteristic is achieved which counteracts the fact that with the closure flap closed an increased pressure and with increasing opening thereof a reduced pressure is present. Thus, the restoring force of the spring is adjusted in size to the respective existing pressure conditions. For example, it is provided in this regard that a drop in the Rückschließkraft takes place at about 5 to 15% of the covered opening path. Accordingly, the maximum return force of the spring or the flap is used only for pressing the flap in the sealing seat. When the maximum Rückschließkraftpunktes in the course of the opening movement is exceeded, the Rückschließkraft continuously drops to a minimum, which corresponds for example to a sixth to a third of the maximum force from. Furthermore, a characteristic is preferred in which the return-closing force runs through a minimum during the opening movement. Consequently, the return force increases again after passing through a minimum value, for example, in a passage of the minimum at about a half opening path of the shutter. The increase in the return force after passing through a minimum value is much slower against the fall of the same after reaching the maximum value, so that upon reaching the maximum opening position of the shutter a Rückschließkraft is present, which corresponds to about 0.3 to 0.5 times the maximum force. In a preferred embodiment, it is further provided in this regard that the spring formed as a flat spring is a snap spring. This is included For example, formed from a profiled metal or steel sheet. Thus, such a snap spring may further be a spring band having a spherical bulge. This is preferably curved perpendicular to the longitudinal direction in the plane of the profile, whereby the bending force initially increases. This increase takes place up to a certain value, which depends on the dimensions of the strip, its modulus of elasticity and the type of profiling, after which the strip in the bending axis buckles, as a result of which the bending force drops markedly.

In further embodiment of the subject invention is free on the closure flap resting spring in particular in the embodiment this as a flat spring, to the bag interior of a, from the Closure flap overhanging wall, this particular in the flap closed position, above but also at least partially over the entire opening path the flap. The closure flap side wall protrudes at least partially with its edge pointing towards the interior of the bag at least over the associated, the wall adjacent Spring sections out. According to this embodiment is a lateral Guide the spring in particular in one embodiment given the spring as a flat spring, which is a migration of the spring in particular prevented transversely to its longitudinal extent. Is preferred In this context, further, that the wall is the spring anyway assigned to the free, the connection end facing away from the spring end. As a result, loading is open with the flap open the filter bag material by the movement in this relative to Closing flap counteracts forwardly projecting spring end. Much more occurs in the course of the opening movement of the flap first, if necessary, the raised wall section in front of the bag wall. The free spring end thus remains the bag wall always spaced. Preference will be given in this regard, that two, viewed in the longitudinal direction of the spring on both sides the spring arranged, the spring-projecting walls are provided. The spring, in particular its free spring end sits on a supporting wall rooted in the flap on, at a distance below the spring towering above Walls or wall sections ends, so that the spring end a defined application area is given to the side is surmounted by the wall sections.

The Holding plate is in a further preferred embodiment with a Extension formed two-thirds or less of the width the filter bag in the, to be assigned to the vacuum cleaner side nozzle Connection area corresponds. Accordingly, the holding plate extends only over a section of the filter bag width, so that viewed in the width direction of the filter bag laterally of the Holding plate a holding plate free and accordingly filter active Bag area remains. In a preferred embodiment corresponds the width of the holding plate about half the width of the filter bag.

A further improved filtration in the vacuum cleaner operation is by a Development of the subject invention achieved in which the Holding plate in the connection area off-center on the filter bag is appropriate. By this asymmetric arrangement of the holding plate in the connection area of the filter bag there are fluidic Advantages. In the interior of the filter bag is thereby a vortex flow brought about or reinforced this. The sucked Dirt is evenly distributed throughout the interior Split the surface of the filter bag. By the result the vortex flow settling centrifugal effect is a Vorseparierung in terms of coarse and fine fractions made in the dirt. Next is such a deliberately evoked Vortex formation in the interior of the filter bag also advantageous in terms the function and mode of action optionally incorporated, free in Bag befindlicher adsorber, since this uniform spatial distribution of these particles is caused.

The Outflow of the through the entry port the holding plate directed air flow into the filter bag runs in an embodiment in the off-center displacement direction the holding plate with respect to the filter bag side connection area. Corresponding the outflow direction is chosen so that the particulate, entering the filter bag airflow tends repellent to the laterally offset arrangement of the retaining plate occurs in the connection area remaining free filter bag area, which favorably supports the vortex formation. alternative the outflow direction can also counter to the displacement direction the retaining plate, so on tends towards the remaining free connection area of the filter bag next to the eccentrically arranged holding plate.

In overlap with the spring, in particular in covering to the flat spring, a recess is formed in the closure flap, which finds on the spring opposite side of the closure flap as a curvature. According to this embodiment, the closure flap in the open position acts as a flow straightener for the incoming air, whereby it is imparted a twist. In this depression dirt particles or the like can become lodged in the closure state of the flap. In order to remove these from the depression, which can further correspond to the spring escape space already described, the depression is provided with an outlet region associated with the hinge region of the closure flap, said outlet region being disposed on the closure flap Ni facing the inside of the bag flows out. Accordingly, the depression is assigned to the hinge region without lateral boundary in the form of a wall or the like. Provided, while the other sides, in particular extending in the direction of extension of the recess and thus in the direction of extension of the spring longitudinal sides and the Anscharnierbereich opposite transverse side of the recess preferably by the above , the spring flanking wall or surrounded by the support wall. In the course of the opening of the closure flap, a trickling out of any dirt particles settling in the depression is made possible via the released outlet region. This is further supported by a configuration in which the outlet region is formed in part by a direction sensor assigned to the interior of the depression. This direction sensor is a constructive element of the closure flap, which in the opening position of the closure flap hinge-side end region of the depression imparts a predetermined direction of escape to the dirt particles which slip out of the depression. Thus, preferably, the directional encoder is formed like a wedge, for further preferred lateral deflection of the particles slipping out of the recess, preferably transversely outwards with respect to the longitudinal extension of the recess or the spring covering it. In a further preferred embodiment, two directional encoders pointing in opposite directions are provided, which derive the slide-off dirt particles on both sides outward out of the recess, furthermore, according to this embodiment, preferably from the covering area to the spring. In a further preferred embodiment, the direction sensor snowplow-like design with a recess pointing towards the plow tip.

Of the the flap partly surrounding current cuffs is in turn at least partially surrounded by a trench whose towards the bag interior facing surface of the trench bottom is aligned at the level of the flap seat. In this Digging the directional transmitter directs a discharged through the outlet waste a, so at least in the direction of the encoder having closure flap-hinge area adjacent trench areas.

Of the Trench is laterally on the one hand by the flow collar and on the other hand by a corresponding to the flow collar extending holding plate wall portion formed. Retaining panel wall section and flowcollar are accordingly below approximate spaced parallel to each other, wherein further the trench on three sides according to the circulation of the flow collar around the closure flap circulates. In the area of the flap flap hinge as well as the spring holder arranged above this is the trench interrupted. The spring support portion and the Anscharnierbereich for the closure flap grows out of the holding plate wall with an extent corresponding to the trench width in Towards the free ends of the flow collar, further wherein the trench between the spring support portion and the end of the flow collar facing the spring support portion is open to the bottom of the flap. It this results in the flap opening position a flow-through opening between the through the Flow collar and held in the open position flap limited flow space and the trench, according to which any dirt particles accumulated in the trench in the filter bag be blown out.

conditioned by the preferred acute-angled employment of the bag attachment level to the pad results in a different trench depth transverse to the hinge axis of the flap, with the lowest Trench depth is assigned to the narrow side region of the filter bag. Starting from the narrow side of the filter bag facing free end of the flow collar increases trench depth in the direction of circulation around the flow collar up to a trench depth, which corresponds to two to four times the smallest trench depth.

In further embodiment of the subject invention runs the trench bottom rectified to the pad, more preferably rectified with a flat configuration of the trench bottom to the flat connection surface.

To cover the perceived as unpleasant dust odor by scenting is provided in a development of the subject invention that on the filter bag a relative to the filter bag movable support member is mounted for a scent chip. This carrier element and thus the fragrance chip are associated with the outside of the filter bag, whereby the sucked through the filter bag exhaust air sweeps over the fragrance chip. Due to the movable arrangement of the fragrance chip carrier element relative to the filter bag, a favorable adaptation of the position of the fragrance chip to the degree of filling of the filter bag and the corresponding installation thereof is achieved. The fragrance chip is held according to this embodiment always in contact with the filter bag outer wall and can understand the movement of the same. The carrier element can be present as a separate element, for example in the form of a plastic injection-molded part. Preferred is an embodiment in which the carrier element is connected to the holding plate, so on, in particular under one-piece training preferably in plastic injection molding. Here is the relative motion Given the support element is preferably connected in the region of the mounting plane for the filter wall to the support plate, so that the support member rests on the outer wall of the filter bag. The connection is given, for example, by a material-thinned connection region, which offers the mobility of the carrier element relative to the holding plate, further relative to the filter bag. With regard to the fragrance chips to be inserted into the carrier element, reference is made to FIGS EP 1 482 825 B1 directed. The content of this patent is hereby incorporated by reference in its entirety into the disclosure of the present invention, also for the purpose of incorporating features of this patent application into claims.

The close the given numerical bandwidths also - as far as such are not given by way of example are -, all intermediate values, namely especially in 1/10 steps, further in 1/10 steps from the lower and / upper limit limited to the other border. "And" stands for the fact that both borders by one or several tenths pushed to the limit, d. H. limited become.

below the invention with reference to the accompanying drawings, which only represents three embodiments, closer explained. It shows:

1 a vacuum cleaner in the manner of a stalk-guided hand vacuum cleaner, accommodating a filter bag;

2 a cross section through the filter bag with respect to the inside of a, a flap having retaining plate, concerning a first embodiment;

3 the holding plate with the flap in a perspective detail view;

4 the section according to the line IV-IV in 3 ;

5 the section along the line VV in 3 ;

6 a sectional view according to 4 concerning the position of use;

7 one of the 2 corresponding representation, a second embodiment concerning:

8th the holding plate of the second embodiment in perspective detail view with indicated in dash-dotted line style filter bag;

9 the section according to the line IX-IX in 7 ;

10 the section according to the line XX in 7 ;

11 a sectional view according to 9 concerning the position of use;

12 in a third embodiment, the holding plate with flap in a perspective detail view, the flap closure position concerning;

13 the view against the holding plate according to the arrow XIII in 12 ;

14 the top view of the holding plate;

15 the section according to the line XV-XV in 14 ;

16 the section according to the line XVI-XVI in 15 ;

17 one of the 15 corresponding sectional view, but an intermediate position in the course of a flap opening movement concerning;

18 in an individual view, the top view of the spring plate acting on the spring in a flap position according to 17 ;

19 another one 15 corresponding representation, but after further opening shift of the shutter;

20 one of the 18 corresponding representation of the spring, the position according to 19 concerning;

21 a sectional view according to 15 but regarding the shutter opening position;

22 one of the 18 corresponding representation of the spring in the shutter opening position according to 21 ;

23 in a perspective view another embodiment of the holding plate;

24 the top view of this;

25 the section according to the line XXV-XXV in 23 ;

26 the section according to the line XXVI-XXVI in 23 ;

27 a filter bag in view with an associated holding plate according to the embodiment according to 23 ;

28 the section according to the line XXVIII-XXVIII in 27 ;

29 the side view against the filter bag.

Shown and described is first with reference to 1 a vacuum cleaner 1 , in particular household vacuum cleaner, which is designed as a hand-held handle unit. This first has a base unit 2 on, with an unillustrated electric motor for a suction / blower unit. On the base unit 2 is a intended for receiving the vacuumed dust filter cartridge 3 docked. This includes a filter bag 4 ,

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

Next has the base unit 2 a gooseneck-shaped extension, which extends over the region of the filter cartridge 3 extends. In the area of the free end of this extension forms a plug-in receptacle for a stem 6 of the vacuum cleaner 1 out. In the area of the free end of the stalk 6 is an operating handle 7 intended. This has a thumb-actuated actuator in the form of a slide switch, via which the power of the base unit 2 recorded electric motor is adjustable.

For soil cultivation is the basic device 2 fluidly with a header 8th connected. This may be a suction nozzle having a rotating brush.

The suction mouth, not shown, of the attachment 8th fluidly communicates with the one in the filter cartridge 3 taken filter bag 4 , including an unillustrated flow channel the base unit 2 interspersed. At the end, this flow channel merges into a connection section.

The latter is in one, in a parting plane T between the filter cartridge 3 and basic device 2 placed trained cassette holder. Placed offset this extends a produced in the illustrated embodiment of a plastic material retaining plate 9 of the filter bag 4 assigned to the connection section of the suction line in a flat connection surface A a passage opening 10 has to introduce the dust-laden suction air. On the retaining plate 9 is the underside, that is facing away from the base device side receiving area an air-permeable dust bag 21 attached. The bag attachment plane B extends parallel to the connection surface A. In operating position, the filter bag is located 4 in overhead position in the filter cassette 3 one; is therefore in the suction mode from below through the filling opening 10 incident flow.

When not in operation, that is, when not Saugluftbeaufschlagung the filter bag 4 is the passage opening 10 the holding plate 9 bag inside facing of a back flap 11 covered. This is the underside of the retaining plate 9 hinged. The displacement of the flap 11 in the opening direction is done by the Saugluftbeaufschlagung. The provision in the closed position according to 3 to 5 is spring assisted. According to this embodiment, the filter bag 4 operable in overhead position. After switching off the suction air flow on the through the holding plate 9 formed soil lowering dirt and dust particles can not according to this embodiment through the passage opening 10 get back into the flow channel.

The passage opening 10 and accordingly also the closure flap 11 are formed in the ground plan deviating from a circular shape, so on in about elongated tongue-like with two convex outwardly curved longitudinal edge edges 12 and 13 and one of the articulation opposite, also convex outwardly bulging end edge edge 14 , The hinge axis x extends transversely to the longitudinal extent of the closure flap 11 and thus further transversely to the longitudinal edge edges 12 and 13 , The hinge 15 is formed by a corresponding material taper in the closure flap 11 in the style of a movie hinge.

The spring loading of the flap 11 towards the closure position is achieved by one at the closure flap base 16 attached spring 20 on the inside of the bag facing the surface of the flap 11 acts. The feather 20 is formed in the illustrated embodiment as a wire bow spring.

The flap 11 , In particular, the pivotable about the axis x section of the closure flap 11 is surrounded by a stream collar 17 , This extends perpendicular to the plane of extension of the retaining plate 9 also the inside of the filter bag 4 facing in the manner of a partly encircling wall. The flow collar 17 can in the simplest way in one piece, of the same material together with the holding plate 9 be prepared for example by plastic injection molding.

The wall thickness of the flow collar 17 is only a few millimeters, in particular 1 to 5 mm, for example 3 mm.

The flow collar 17 has a maximum height h measured in the vertical direction, which is about one third of the maximum extension length 1 the flap 11 , measured transversely to the folding axis x, corresponds. This maximum height h is provided in the end edge 14 the flap 11 associated region of the flow collar 17 , across the connection areas of the longitudinal edge edges 12 and 13 associated collar sections. Along the longitudinal edge edges 12 and 13 the height h reduces to the hinge 15 on a measure, which about the material thickness of the Krömungskragens 17 equivalent. Accordingly, the current collar runs 17 from the end edge of the edge 14 assigned area on both sides, so that in plan view about a horseshoe shape of the flow collar 17 results. The flow collar 17 is facing the hinge connection open.

The flow collar 17 is further positioned so that at least the in the closed position of the flap 11 associated inner wall region of the flow collar 17 immediately adjacent to the facing, peripheral edge of the flap 11 , so on, if necessary, with a distance of a few tenths of a millimeter to a millimeter (see. 4 ). As can be further seen from the cross-sectional views, the flow collar extends 17 in the vertical direction with respect to a cross section starting from the root area on the holding plate 9 wedge-shaped tapering, with a wedge slope facing the collar interior. For example, a material thickness of the collar of, for example, 3 mm is selected in the root area, while a material thickness of 0.5 to 1 mm is selected in the region of the free frontal collar area.

In operation of the vacuum cleaner 1 via the suction air flow, a pressure (arrow P) on the inside of the filter bag 4 opposite surface of the flap 11 exerted, which counter to the force of the spring 20 the flap 11 holds in the open position. This open position is in 6 in dash-dotted line style, with the reference numeral 11 '' provided, shown.

Turn off the vacuum cleaner 1 and concomitant drop in pressure P, the shutter falls 11 spring assisted in the retainer plate opening lock position. Into the dustbag 21 protruding flow collar 17 forms the closing flap 11 an increasingly reducing gap, which initially prevents coarser suction material in the sealing seat between the flap 11 and holding plate opening 10 device. In addition, the flow velocity of the non-abruptly decreasing air flow is increased by the reduced gap, so that the remaining de gap is blown free (see arrow P 'in 6 ), what a jamming or leakage of suction material ( 22 ), further prevented in particular by dust particles or activated carbon. This positive effect also occurs when due to a heavily filled filter bag 4 comes to a pressure loss.

As further from the representation in 6 to recognize is the vertical height h, in particular the maximum vertical height h of the flow collar 17 adapted to the vertical opening height of the flap 11 at an opening thereof of about 30 ° (see dash-dotted representation of the flap 11 , marked with 11 ' ).

The 7 to 11 show a second embodiment of the filter bag 4 , This has a holding plate 9 on, the facing the device-side flow channel has a flat connection surface A. In this opens the holding plate opening 10 ,

Facing away from the terminal surface A is also in this embodiment, a holding plate opening 10 three-sided surrounding current collar 17 intended. This extends to the filter bag inside pointing in a cross section through the retaining plate 9 at least partially at an acute angle alpha to a pad vertical. In the illustrated embodiment is associated with a longitudinal edge 12 the flap 11 as well as the flap axis x opposite flow collar portion 14 as well as the transition between these two flow collar portions at an angle alpha of about 10 ° aligned to a pad vertical, this further from the terminal surface A and starting from the closure flap 11 under widening of the flow collar 17 limited opening cross-section. The further longitudinal edge 13 the flap 11 assigned runs the section of the flow collar 17 substantially perpendicular to pad A.

The largest vertical extension of the flow collar 17 is in the transition region of the flap collar axis x opposite flow collar portion 14 for inclined, the one longitudinal edge 12 the flap 11 given flow collar portion given.

Also run in this embodiment, the flow collar ends in the direction of the valve axis x.

Surrounding the flow collar 17 , further on all sides encircling the flap 11 has the holding plate 9 a Halteplattenwandung 23 on. This is in the area of the flow collar 17 in cross-section through the retaining plate 9 considered with distance to the flow collar 17 positioned. The connection area of the flap 11 on the retaining plate 9 and thus also the flap axis x are within the through the Halteplattenwandung 23 limited area of the retaining plate 9 placed.

The distance between retaining plate wall 23 and flow collar 17 is approximately the same all around.

Next runs the Halteplattenwandung 23 in a cross section through the retaining plate 9 (See, for example 10 ) parallel to the flow collar 17 , bringing about the height extension of Halteplattenwandung 23 consider the reached ditch 24 has an approximately constant width. The ditch 24 runs according to the circulation of the flow collar 17 On three sides, is only in the hinge connection through the base 16 interrupted, where continue the trench bottom 29 rectified to the pad A, that is aligned parallel to the flat pad A and between the base, which also serves the spring holder, and the base of the end facing the flow collar 17 to the bottom of the flap 11 is open.

At the free end portion of the revolving Halteplattenwandung 23 closes an outwardly directed bag attachment collar 25 at. The dust bag to be held 21 facing surface forms the bag attachment plane B.

By adapted vertical length extension of Halteplattenwandung 23 results according to the illustrations in a cross section through the retaining plate 9 an acute-angled orientation of the bag attachment plane B in relation to the pad A. In the illustrated embodiment, this acute angle beta is about 10 °.

The inclination of bag attachment plane B and flow collar 17 is at least partially encircling the flow collar 17 according to the sectional view in 10 chosen such that the fastening plane B defining bag fastening collar 25 and the flow collar 17 Starting from a vertical surface of the connection surface, they are inclined in the same direction. As a result of the bag fastening plane B set at an angle to the connection surface A and the resulting different height of the circumferential holding plate wall 23 arise in the direction of rotation considered different depths of the trench 24 , wherein the smallest trench depth in the assignment state to the filter bag 4 according to the representations in the 27 to 29 a narrow side area 30 associated with the filter bag.

The circulating through the three-sided free edge of the flow collar 17 defined flow collar opening plane O extends in the illustrated embodiment, parallel to the bag fastening plane B, wherein further the flow collar 17 extending beyond the bag attachment plane B into the interior of the dust bag 21 extends, about 0.3 times the vertical height of the flow collar 17 ,

The 12 to 22 show a further embodiment, based on the previously with reference to the 7 to 11 described embodiment. So are in particular the retaining plate 9 , the flap 11 as well as the flow collar 17 and the retaining plate wall 23 as described before.

The the flap 11 in its closed position acting spring 20 is formed in this embodiment as a flat spring with a curvature transverse to its longitudinal extent. A free end of the spring 20 is in the flap hinge 15 facing, halbtplattenwandungseitig provided base 16 anchored, what basis 16 at the same time a spring support portion 31 ausformt, in which the free end of the spring 20 is caught, so for example by plug-in bracket. To the base 16 opposite flat end of the flat spring runs in a projection on the flap 11 looks pointedly, while maintaining the curvature over the entire free longitudinal extent of the spring 20 , From the flap 11 From the perspective is the spring 20 convexly arched (cf. 16 ).

As a result of this embodiment of the spring 20 is a snap spring 27 formed, which is the spring 20 forming spring band is cut from a profiled - cambered - metal or steel sheet.

In projection onto the facing flap surface, the spring extends 20 freely over a spring-alternative space 26 , This is as in the longitudinal extension of the spring 20 considered concave depression of the closure flap 11 formed, further trough-like starting from the spring 20 facing flap level over the inflow side facing the plane of the flap 11 out. The alternative space 26 is facing the filter bag interior according to the configuration of the flow collar 17 three-sided from a wall 28 which is transverse to the longitudinal extent of the spring 20 considered distance between two mutually parallel wall sections is dimensioned larger than considered in the same direction width of the spring 20 , The latter rests on the base with its tip end 16 opposite supporting wall 28 ' from.

Due to the structural design of the Knack spring 27 is given an advantageous spring characteristic of the same. Starting from an extended position according to 15 , which corresponds to the shutter position, the bending force increases due to a flow of the flap 11 at startup of the vacuum cleaner 1 initially strong, for example, up to three Newton. Depending on the dimensions of the pop spring 27 whose modulus of elasticity and the type of profiling buckles the pop spring 27 in the course of their bending almost abruptly, after which the bending force drops significantly. This first kink zone is in the relevant representations of 17 and 18 designated K ₁ .

The bending force, which at the same time the Rückschließkraft the flap 11 represents, in the course of further bending initially continuously from, this first until reaching a further break point at a shutter opening position of about 25 °. The resulting bending zone K ₂ is formed in the illustrated embodiment in the base associated quarter portion of the spring 20 a, while the previously occupied kink zone K ₁ approximately in the middle of the longitudinal extent of the spring 20 ausformt.

In the course of further flow-induced Aufschwenkbewegung the flap 11 arched the pop spring 27 under further tip-side support on the wall section 28 ' , the closure flap level facing the bag interior, passing through into the escape space 26 out. As a result, an influence of the spring characteristic is counteracted by a possible support on the shutter flap level.

In a further embodiment, the snap spring 27 in the course of their closing flap opening movement subsequent movement only have a break point, wherein after a nearly sudden kinking of the spring 20 the bending force initially falls significantly until the passage of a bending force minimum, after which in the course of further bending, the bending force again slightly increases, this preferably until reaching a bending force which is smaller than the bending force in the flap closure position.

The feather 20 or the flat part-like pop spring 27 indicates according to the proposed embodiment, further also due to the possible evasion in the alternative space 26 in every position of the flap 11 in the course of its pivotal movement, a bending angle gamma, which is always greater than the respective flap opening angle delta with respect to the closure plane. Thus, the bending angle gamma of the spring corresponds 20 in each opening intermediate position of the flap 11 1.1 to 2.5 times the flap opening angle delta, wherein the indicated numerical bandwidth also includes all intermediate values, especially in 1/10 increments from the lower and / or upper limit to the other limit. "And" stands for the fact that both borders are shifted by one or more tenths towards the border, ie limited.

Another embodiment show the 23 to 29 , This is based on the previously based on the 12 to 22 described embodiment. The the flat spring 20 flanking wall 28 or the wall sections are increased in the free end of the spring associated end portion such that it is the spring 20 surmounted by a measure which corresponds to four to ten times the dimension of the spring thickness, so that in a flap opening position not the free spring end but rather the projecting wall section optionally occurs against the inner wall of the bag. In the illustrated embodiment, both wall sections are provided with a spring end projecting portion.

The below the spring 20 provided recess in the form of an alternative space 26 has a hinge region of the flap 11 associated outlet area 32 on. This opens into the inside of the bag facing flap surface. About this outlet area 32 You may find yourself in the alternative room 26 accumulating dirt particles in the shutter opening from the alternative space 26 slip. This is further supported by two pointing in opposite directions, wedge-like direction generator 33 , the snowplow-like in the outlet area 32 are arranged, with a plow tip leading to the escape space 26 has.

The shovel-like directional givers 33 cause a distraction in the alternative space 26 accumulated dirt particles in the course of the flap opening opening movement in the transverse direction to the longitudinal extent of the escape space 26 to the outside, for the deposition of dirt particles on the associated trench sections. As a result of the trench sections which open toward the flow path in the closing flap opening position, the laterally discharged dirt particles are at the same time removed from the trench 24 in the filter bag 4 blown out.

The direction donors 33 are one-piece, the same material together with the flap 11 , beyond that with the entire holding plate 9 formed and are of the flat spring 20 covered.

Associated with the filter bag side narrow side 30 has the holding plate 9 one over the narrow side area 30 of the filter bag 4 free protruding handling tab 34 on.

In the region of the fastening plane B, associated with the spring support portion 31 having area on the bag attachment collar 25 in the handling tab 34 opposite corner region a support element 35 for a fragrance chip 36 aasgeformt. This is via a material thinner on the bag attachment collar 25 pivotally arranged and has an elongated rectangular floor plan. According to this arrangement lies in the bag mounting plane B extending rear side of the support element 35 on the associated filter bag Wandungsab section and can, according to the pivotable arrangement on the holding plate 9 Trace movement of the wall as a result of setting up the filter bag.

The one of the support surface forming the back of the support element 35 opposite broad side of the support element 35 has a recess 37 for inserting the fragrance chip 36 on. Starting from two opposite, the recess 37 delimiting longitudinal walls of the support element 35 protrude facing each other protrusions 38 into the depression 37 one, the clip holder of the fragrance chip 36 serve.

As in particular in the representation in 27 to recognize, has the retaining plate 9 , in particular the bag fastening collar 25 for fixing the filter bag 4 an extension n, which is about half the width b of the filter bag 4 in the holding plate connection area 39 equivalent. This connection area 39 is a narrow side 40 of the filter bag 4 assigned.

The holding plate 9 is off-center of the connection area 39 attached to the filter bag, according to the side of the holding plate 9 a free, filter-active filter bag area 41 remains.

By this asymmetrical arrangement of the holding plate 9 to the connection area 39 of the filter bag 4 is achieved a fluidically favorable solution, as a result in the interior of the filter bag 4 a desired vortex flow is brought about or this is amplified. Here, on the one hand, the sucked-in dirty material is divided evenly over the entire surface of the filter bag, on the other hand, a pre-separation is made in terms of coarse and fine fractions in the dirty due to the centrifugal effect. In addition, such a deliberately induced vortex formation in the interior of the bag is advantageous in terms of the function and the mode of action of any loosely introduced adsorbent media, since this causes a uniform spatial distribution of the corresponding media.

This vortex formation is further favored by the outflow direction S in the displacement direction of the holding plate 9 related to the connection area 39 runs, ie in which the holding plate 9 adjacent, free-standing filter bag area 41 facing away pouch area. This also favors the installation of the filter bag, especially in the course of a first use, in which the filter bag 4 present as a flat bag.

All disclosed features are essential to the invention (in itself). In the disclosure of the application is hereby also the disclosure content the associated / attached priority documents (Copy of the advance notice) fully included, too for the purpose, features of these documents in claims present Registration with.

1

vacuum cleaner

2

basic unit

3

cassette

4

filter bag

5

electric cable

6

stalk

7

Handle

8th

header

9

Retaining plate

10

Retaining plate opening

11

flap

12

Longitudinal edge

13

Longitudinal edge

14

Front edge

15

hinge

16

Base

17

flow collar

18

19

20

feather

21

anther

22

particle

23

Halteplattenwandung

24

dig

25

Bag mounting collar

26

alternative space

27

Knack spring

28

wall

28 ' supporting wall

29 grave soil

30 Narrow side area

31 Spring mounting portion

32 outlet

33 directors

34 handling area

35 support element

36 fragrance chip

37 deepening

38 projections

39 terminal area

40 narrow side

41 Filter bag range

x axis

b width

H height

l length of extension

n length of extension

α - angle

β - angle

γ - angle

δ - angle

A terminal area

B Bag attachment level

K ₁ kink zone

K ₂ kink zone

O Flow collar opening plane

P print

S outflow

T parting plane

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - EP 1482825 B1 [0028]

Claims (45)

Filter bag ( 4 ) for a Staubsauer ( 1 ), with a retaining plate ( 9 ) and a closure flap ( 11 ), which penetrate into the interior of the filter bag ( 4 ), wherein the holding plate has a connection surface (A), characterized in that on the holding plate ( 9 ) a flow collar ( 17 ) is formed, the inside of the retaining plate ( 9 ) and surrounding to the closure flap ( 11 ) into the interior of the filter bag ( 4 ). Filter bag according to claim 1 or in particular according thereto, characterized in that the flow collar ( 17 ) an extension perpendicular to the plane of extension of the retaining plate ( 9 ) having. Filter bag according to one or more of the preceding claims or in particular according thereto, characterized in that the flow collar ( 17 ) in cross-section perpendicular to the connection surface (A) of the retaining plate ( 9 ) includes an acute angle (α) to a pad vertical. Filter bag according to one or more of the preceding claims or in particular according thereto, characterized in that the flow collar ( 17 ) has a vertical height (h) corresponding to a vertical opening height of the closure flap ( 11 ) at an opening of the flap ( 11 ) from 5 ° to 60 °. Filter bag according to one or more of the preceding claims or in particular according thereto, characterized in that the closure flap ( 11 ) has a folding axis (x) and that the Strö tion collar ( 17 ) the closure flap ( 11 ) in any case opposite to the folding axis (x) surrounds. Filter bag according to one or more of the preceding claims or in particular according thereto, characterized in that the flow collar ( 17 ) the closure flap ( 11 ) surrounds on three sides. Filter bag according to one or more of the preceding claims or in particular according thereto, characterized in that the flow collar ( 17 ) the closure flap ( 11 ) with the exception of the folding axis (x) associated edge region surrounds. Filter bag according to one or more of the preceding claims or in particular according thereto, characterized in that the flow collar ( 17 ) the closure flap ( 11 ) with different, vertical extensions. Filter bag according to one or more of the preceding Claims or in particular according thereto, characterized that the vertical extension with respect to the folding axis (x) opposite edge region largest is. Filter bag according to one or more of the preceding claims or in particular according thereto, characterized in that the vertical extent associated with one of the folding axis (x) opposite corner region of the closure flap ( 11 ) is the largest. Filter bag according to one or more of the preceding claims or in particular according thereto, characterized in that the cross section of the flow collar ( 17 ) in any case over a portion of the vertical height with increasing distance to the holding plate ( 9 ) decreased. Filter bag according to one or more of the preceding claims or in particular according thereto, characterized in that the flow collar ( 17 ) inside one to the edge contour of the flap ( 11 ) sloping slope has. Filter bag according to one or more of the preceding claims or in particular according thereto, characterized in that a bag fastening plane (B) between filter bag ( 4 ) and retaining plate ( 9 ) in a cross section perpendicular to the pad (A) of the retaining plate ( 9 ) at an acute angle (ß) to the pad (A). Filter bag according to one or more of the preceding claims or in particular according thereto, characterized in that the flow collar ( 17 ) starting from the connection surface (A) beyond the bag attachment plane (B) into the interior of the filter bag ( 4 ). Filter bag according to one or more of the preceding claims or in particular according thereto, characterized in that the supernatant dimension of the flow collar ( 17 ) beyond the attachment plane (B) beyond 0.2 to 0.7 times the vertical height (h) of the flow collar ( 17 ) corresponds. Filter bag according to one or more of the preceding claims or in particular according thereto, characterized in that on the inside of the retaining plate ( 9 ) a the flap ( 11 ) and the flow collar ( 17 ) surrounding retaining wall ( 23 ) is trained. Filter bag according to one or more of the preceding claims or in particular according thereto, characterized in that the retaining plate wall ( 23 ) with lateral distance to the Strö collar ( 17 ) is trained. Filter bag according to one or more of the preceding claims or in particular according thereto, characterized in that the distance between Halteplattenwandung ( 23 ) and flow collar ( 17 ) over the circumferential length of the flow collar ( 17 ) is equal to. Filter bag according to one or more of the preceding claims or in particular according thereto, characterized in that the retaining plate wall ( 23 ) transversely to the plane of extension of the retaining plate ( 9 ) parallel to the flow collar ( 17 ). Filter bag according to one or more of the preceding claims or in particular according thereto, characterized in that on the flap ( 11 ) facing away end of the Halteplattenwandung ( 23 ) an outwardly extending, circulating bag attachment collar ( 25 ). Filter bag according to one or more of the preceding claims or in particular according thereto, characterized in that the closure flap ( 11 ) is spring-loaded in its closed position and that in the closure flap ( 11 ) starting from the spring-loaded side, a spring-escape space ( 26 ) is trained. Filter bag according to one or more of the preceding claims or in particular according thereto, characterized in that the spring ( 20 ) is a flat spring, with a curvature transverse to its longitudinal extent. Filter bag according to one or more of the preceding claims or in particular according thereto, characterized in that the free on the flap ( 11 ) resting spring ( 20 ) to the bag inside of one, from the flap ( 11 ) outgoing wall ( 28 ) is surmounted. Filter bag according to one or more of the preceding claims or in particular according thereto, characterized in that the wall ( 28 ) the feather ( 20 ) in any case associated with the free spring end. Filter bag according to one or more of the preceding claims or in particular according thereto, characterized in that two sides of the spring ( 20 ) arranged, the spring superior walls are provided. Filter bag according to one or more of the preceding claims or in particular according thereto, characterized in that the spring ( 20 ) on one in the flap ( 11 ) rooting support wall ( 28 ' ) is seated. Filter bag according to one or more of the preceding claims or in particular according thereto, characterized in that the retaining plate ( 9 ) with an extension ( 1 ) formed two-thirds or less of the width (b) of the filter bag ( 4 ) corresponds. Filter bag according to one or more of the preceding claims or in particular according thereto, characterized in that the holding plate in the connection area ( 39 ) off-center to the filter bag ( 4 ) is attached. Filter bag according to one or more of the preceding claims or in particular according thereto, characterized in that the outflow direction (S) in the displacement direction of the retaining plate ( 9 ). Filter bag according to one or more of the preceding claims or in particular according thereto, characterized in that one below the spring ( 20 ) formed recess a the hinge region of the flap ( 11 ) associated outlet area ( 32 ) having. Filter bag according to one or more of the preceding claims or in particular according thereto, characterized in that the outlet region ( 32 ) partly by a direction transmitter assigned to the interior of the depression ( 33 ) is formed. Filter bag according to one or more of the preceding claims or in particular according thereto, characterized in that the direction sensor ( 33 ) is wedge-shaped. Filter bag according to one or more of the preceding claims or in particular according thereto, characterized in that two directional sensors pointing in opposite directions ( 33 ) are provided. Filter bag according to one or more of the preceding claims or in particular according thereto, characterized in that the flow collar ( 17 ) at least partially from a trench ( 24 ) is surrounded. Filter bag according to one or more of the preceding claims or in particular according thereto, characterized in that the direction sensor ( 33 ) in the trench ( 24 ) steers. Filter bag according to one or more of preceding claims or in particular according thereto, characterized in that the trench ( 24 ) laterally on the one hand by the flow collar ( 17 ) and on the other hand by a corresponding to the flow collar ( 17 ) extending holding plate wall portion ( 23 ) is formed. Filter bag according to one or more of the preceding claims or in particular according thereto, characterized in that the trench ( 24 ) rotates on three sides. Filter bag according to one or more of the preceding claims or in particular according thereto, characterized in that the trench ( 24 ) is interrupted by a spring support portion ( 31 ) of the retaining plate ( 9 ). Filter bag according to one or more of the preceding claims or in particular according thereto, characterized in that the trench ( 24 ) between the spring support portion (FIG. 31 ) and the spring support portion ( 31 ) facing the end of the flow collar ( 17 ) to the bottom of the flap ( 11 ) is open. Filter bag according to one or more of the preceding claims or in particular according thereto, characterized in that the trench depth transversely to the hinge axis (x) of the closure flap ( 11 ) is different. Filter bag according to one or more of the preceding claims or in particular according thereto, characterized in that the lowest trench depth the narrow side region of the filter bag ( 4 ) assigned. Filter bag according to one or more of the preceding claims or in particular according thereto, characterized in that the trench bottom ( 29 ) is rectilinear to the pad (A). Filter bag according to one or more of the preceding claims or in particular according thereto, characterized in that on the filter bag ( 4 ) relative to the filter bag ( 4 ) movable support element ( 35 ) for a fragrance chip ( 36 ) is attached. Filter bag according to one or more of the preceding claims or in particular according thereto, characterized in that the carrier element ( 35 ) with the retaining plate ( 9 ) connected is. Filter bag according to one or more of the preceding claims or in particular according thereto, characterized in that the carrier element ( 35 ) in the region of the bag fastening plane (B) on the retaining plate ( 9 ) is attached.