EP0600225A1 - Hand-held vacuum cleaner - Google Patents

Abstract

The invention relates to an applicator unit, in particular for applying liquid or substances on window panes. For convenience of use, the applicator unit is designed with a sponge body (30) which is accommodated in a housing (31). <IMAGE>

Description

The invention relates to a motor-driven hand-held suction device according to the preamble of claim 1.

A hand-held suction device of claim 1 is known from DE-OS 39 26 777. A suction mouthpiece is an integral part of the base of the handheld suction device designed as a soft housing, which is comparable to a flat iron. The corresponding tapering in combination with the soft, elastic shape (comparable to a sponge, for example) allows cleaning to be carried out effectively also in the corners, for example of the panels of paneling. The filter is located in the housing of the handheld suction device, close to the motor; the suction air is discharged through the end of the free-hand grip of the hand-held vacuum device.

In the market-available, mostly larger, motor-driven household vacuum cleaners, the suction mouthpiece is interchangeably assigned to the suction pipe, suction hose or housing as a so-called plug nozzle. The filter is also in the housing here.

The object of the present invention is to design a generic hand-held suction device in a manner which is advantageous in terms of manufacture and use, in such a way that even better consideration of the applications which occur in practice is made possible.

This object is achieved by the invention specified in claim 1.

Subclaims are advantageous developments of the subject matter of the invention.

As a result of such an embodiment, a generic hand-held suction device of increased use value is achieved: This is primarily due to the variability and adapted effectiveness that has been opened. The best conditions are available for the respective special applications. The whole thing can be realized as a so-called device package consisting of the basic component motor-blower unit and the special components for suction, wiping and application. As with the large domestic appliances, the suction cross-sectional shape can be adapted to the respective case, but this is not simply done by plugging in a different suction nozzle with a wider or narrower mouth cross-section, but a special suction attachment or the like is used, which is already adapted to the size, i.e. offers the optimal filter area in accordance with the suction cross-section, since each suction attachment has its own optimally acting filter. The hand-held vacuum cleaner itself no longer needs to be dismantled practically in order to be able to access the filter. Rather, this problem is solved with a suction attachment, the so-called dust and crumb attachment, by a removably arranged holder for a dust bag as a filter. In this regard, it also proves to be advantageous that the holder has a nozzle over which the dust bag can be slipped and that clamping bodies are hinged to the nozzle for clamping the dust bag to the nozzle. The general removability of the holder protects the collapsible soft dust bag from the buttons or fingers, which would otherwise take place without a line of sight, and from gripping due to gripping, which lead to a kind of aspiration when filled would. Rather, the means that also represent the clamp holder and overlap the bag, with a corresponding design, even bring a kind of protective capsule. The sealing concerns are well taken into account when the neck of the dust bag can be inserted into a V-ring seal on the nozzle. The clamping bodies close the V-legs of this radial seal. The further measure also proves to be advantageous in that the length of the clamping bodies with corresponding wall extensions exceed the connecting piece. They look like a corset. However, in order to alternatively open up the possibility of leaving the dust bag with at least a protruding protrusion for the purpose of taking it out or pulling it off, it proves to be advantageous for the clamping bodies to partially enclose the dust bag, in particular with regard to a length extending beyond the neck. Gripping sections remain free. The assignment of the opening end of the dust bag, which is generally matched to the cross section of the connection piece, is significantly further favored in that the connection piece has an opening plane which includes an acute or obtuse angle with an axis of the connection piece. Ie, the opening level of the nozzle is cut at an angle. This means that part of the end of the nozzle has a sharpened, exposed position on the board. There is therefore no level edge opposite a level opening edge of the bag. Rather, there is a much easier pushing on of the dust bag. This configuration is favored in that the axis encloses the obtuse or acute angle essentially in directions offset by 90 ° to one another. In other words: there is a skewed course of the opening level of the nozzle. Furthermore, the invention proposes that on the outer opening edge, then to the inside of an inverted Bag extending, a wing-like expansion element is provided. This avoids bag collapse and consequently leaves the entire effective area of the dust bag available. But this also has the advantage of expanding the dust bag, which is folded from the start to a minimal cross-section. The wing-like widening element namely leads continuously to the jacket wall of the nozzle. This effect is further optimized in that two widening elements are provided which are arranged essentially symmetrically to one another. These are expediently in a spatial juxtaposition. Three wing-like widening elements of the jacket wall of the connecting piece, arranged in the same angular distribution, can also be formed. In order to prevent dirt and dust particles from falling back or even escaping into the area of the suction mouth when the hand-held vacuum device changes its position, the opening edge of the nozzle is covered with a flexible disc, in particular a rubber disc, which serves as a check valve and is fixed on one side is. This deviates slightly in the suction flow, but spontaneously returns to its closed position. In order to obtain a self-adjusting suction effect with small-area suction and large-area suction without the provision of special masks or control means, the further configuration is such that the bristle-framed suction attachment is elongated with a width / length ratio of about 1: 3, and that a flow cross section continues directly into the suction line through a separation in the tip area of the suction attachment, which runs approximately parallel to a suction plane, whereby the flow in the rear area is first deflected into the tip area, in order then to flow into the suction line. Will So physical zones, such as suctioned off sculptures, have a high, practically spot-like suction mouth area; the bristle-bordered zone in the rear area, due to the lack of a larger covering area, creates a softer intake flow through an object there. Only when there is surface contact with the entire usable area of the bottom of the hand-held suction device does the rear area have a practically equivalent effect. The tip region then acts primarily as the deflection zone of the suction flow which bundles the total flow. A generic device also offers the advantage of continued use in that the suction attachment is designed as a so-called window attachment, in a combination of wiping and suction. For this purpose, it is proposed that this suction attachment have an approximately triangular suction wiping surface. The triangular shape is particularly accessible from the corner. It is again advantageous that the suction attachment has an equilateral triangular suction surface and has an approximately flat filter part as a prefilter in the form of an open-cell foam which is covered by a fleece. This opens up its use for window cleaning when using dust or dirt-binding solutions by taking into account the pore-closing effect of the binding agents, as is known, and 80% - 90% of the dust being caught in advance, i.e. in the foam skeleton. Only a very small proportion of dry fine dust penetrates. In order above all to enable streak-free wiping, the foam part forming the said prefilter is covered with a fleece. Fleece and foam form one unit. Due to the polydirectionality of its fibers, this fleece, which is comparable to a velor in its softness, leaves enough passage areas for the lifted binding material or the dirt particles. Such a filter part is after repeated Use only washed. To increase the filter effect or to trap the fine dust, the procedure is further followed by a filter cloth as a safety or main filter in the direction of flow of the suction air. This brings a system of independent importance, namely "filter in filter". After saturation, the main filter is replaced by a new filter cloth, for which purpose the pre-filter and main filter are interchangeably arranged in the suction attachment. This ensures good suction conditions at all times. An easy access for carrying out the filter replacement is achieved with simple means that the suction attachment of both components is plug-and-snap-connected to the motor part by means of two latching elements which are circumferentially offset or engaging on the suction attachment. As a result, the suction attachment can be released "in the blink of an eye" from the part of the hand-held suction device containing the drive unit and then also connected again. It is advantageous if a first latching element, which also forms an actuating handle, is formed on the motor part. Specifically, the procedure is such that the first latching element is formed with an active part which, when the first latching element is actuated, disengages the second latching element, which is seated in the suction attachment, into a readiness for removal. After that, all that is required is the willful deduction of the suction attachment from the motor part. The action part is advantageously a action ring which, when actuated, disengages the second locking element against a spring action and thus releases the plug-in joint. Taking into account the rotationally symmetrical design of corresponding devices, the ring shape has proven to be favorable in that the ring body freely encompasses the space occupied centrally by the fitting parts.

Fig. 1

ein Handsauggerät mit auswechselbarem, lanzettförmigen Saugvorsatz, in perspektivischer Darstellung, als Staub- und Krümelvorsatz,

Fig. 2

dieses Handsauggerät bei abgekuppeltem Saugvorsatz,

Fig. 3

ein Handsauggerät mit sektoralem Saugvorsatz als Fenstervorsatz, verkörpernd ein kombiniertes Saug-und Poliersystem,

Fig. 4

dieses Handsauggerät bei abgekuppeltem Saugvorsatz,

Fig. 5

dieses Handsauggerät in Explosionsdarstellung sowie partiell aufgebrochen,

Fig. 6

das Handsauggerät gemäß Figur 2 bei aus dem Saugvorsatz herausgenommener Halterung mit Filter in Form eines Staubbeutels,

Fig. 7

das Handsauggerät in Seitenansicht, eingestellt auf großflächiges Saugen, bei vollständig abgesenkten Bürstenstreifen,

Fig. 8

dasselbe bei partiell abgesenkten Bürstenstreifenabschnitten,

Fig. 9

das Handsauggerät bestückt mit einem Saugvorsatz für das Absaugen von Scheiben,

Fig.10

den Staubbeutel gemäß Fig. 6 in perspektivischer Darstellung, und zwar als Einzelbeutel,

Fig. 11

diesen Filter als Endlossatz, zickzackgefaltet und in perspektivischer Darstellung,

Fig. 12

eine Draufsicht auf den Endlossatz der Staubbeutel,

Fig. 13

den Schnitt gemäß Linie XIII-XIII in Figur 12, und zwar in weitestgehend schematischer Darstellung,

Fig. 14

den Schnitt gemäß Linie XIV-XIV in Figur 6, also die Halterung wiedergebend mit auf deren Stutzen aufgestecktem Staubbeutel,

Fig. 15

die Halterung in Draufsicht, und zwar bei abgeklappten Klemmkörpern, und dadurch der Sicht freigegebener V-Ringdichtung,

Fig. 16

eine Ansicht dieser Halterung vom freien Stutzenende her gesehen,

Fig. 17

die Unteransicht hierzu,

Fig. 18

die Halterung in Seitenansicht bei weggelassenen Klemmkörpern,

Fig. 19

den in Aufsteckausrichtung gebrachten Filterbeutel,

Fig. 20

die Draufsicht auf Figur 18, jedoch mit Klemmkörpern, ausgeklappt,

Fig. 21

die Draufsicht auf Figur 19,

Fig. 22

den Vertikalschnitt durch den Saugvorsatz als Fenstervorsatz gemäß Figur 3,

Fig. 23

denselben Saugvorsatz in Explosionsdarstellung, partiell geschnitten,

Fig. 24

ein Filterteil in Form eines offenporigen Schaumstoffteils als Vorfilter, partiell aufgebrochen, mit es umgebendem Vlies als Reinigungsvlies,

Fig. 25

einen Querschnitt durch den mit diesem Filterteil bestückten Saugvorsatz für das Fensterreinigen,

Fig. 26

ein dem Schaumstoffteil zusätzlich zuordbares Filtertuch als Haupt- bzw. Sicherheitsfilter,

Fig. 27

eine Transportschale für das erwähnte Zubehör gemäß Figur 24 und 26,

Fig. 28

ein Figur 25 erklärendes Zuordnungsschema in Perspektive,

Fig. 29

in Explosionsdarstellung die Gehäuseteile des Motorteils,

Fig. 30

in Explosionsdarstellung die Motorenteile des Motorteils, und zwar die feststehenden,

Fig. 31

die rotierenden Motorenteile des Motorteils, ebenfalls in perspektivischer Explosionsdarstellung,

Fig. 32

in Perspektive ein zur Aufbringung eines Lösungsmittels (Bindestoff) dienendes auftragsgerät mit Reinigungsbelag zum Reinigen von Fenstern oder dergleichen und

Fig. 33

einen Schnitt im Bereich der Koppelstelle von Motorteil und Saugvorsatz.

The subject matter of the invention is explained in more detail below on the basis of illustrative exemplary embodiments. It shows:

Fig. 1

a hand-held suction device with a replaceable, lancet-shaped suction attachment, in perspective, as a dust and crumb attachment,

Fig. 2

this hand-held suction device with the suction attachment disconnected,

Fig. 3

a hand-held suction device with sectoral suction attachment as a window attachment, embodying a combined suction and polishing system,

Fig. 4

this hand-held suction device with the suction attachment disconnected,

Fig. 5

this hand-held suction device in exploded view and partially broken open,

Fig. 6

2 the hand-held suction device according to FIG. 2 with the holder with filter in the form of a dust bag removed from the suction attachment,

Fig. 7

the hand-held suction device in side view, set for large-area suction, with the brush strips completely lowered,

Fig. 8

the same with partially lowered brush strip sections,

Fig. 9

the hand-held suction device is equipped with a suction attachment for vacuuming windows,

Fig. 10

6 in a perspective view, namely as a single bag,

Fig. 11

this filter as an endless set, zigzag folded and in perspective,

Fig. 12

a plan view of the endless set of the dust bags,

Fig. 13

the section along line XIII-XIII in Figure 12, and in a largely schematic representation,

Fig. 14

6 shows the section along line XIV-XIV in FIG. 6, that is to say representing the holder with the dust bag attached to its socket,

Fig. 15

the holder in a top view, namely when the clamping bodies are folded down, and thereby the view of the released V-ring seal,

Fig. 16

a view of this bracket seen from the free nozzle end,

Fig. 17

the bottom view of this,

Fig. 18

the bracket in side view with omitted sprags,

Fig. 19

the filter bag placed in the alignment,

Fig. 20

18 shows the top view of FIG. 18, but with sprags,

Fig. 21

the top view of Figure 19,

Fig. 22

the vertical section through the suction attachment as a window attachment according to Figure 3,

Fig. 23

the same suction attachment in an exploded view, partially cut,

Fig. 24

a filter part in the form of an open-pore foam part as a prefilter, partially broken open, with the fleece surrounding it as a cleaning fleece,

Fig. 25

a cross section through the suction attachment equipped with this filter part for window cleaning,

Fig. 26

a filter cloth that can also be assigned to the foam part as a main or safety filter,

Fig. 27

a transport tray for the accessories mentioned according to Figures 24 and 26,

Fig. 28

FIG. 25 an explanatory assignment diagram in perspective,

Fig. 29

in an exploded view the housing parts of the motor part,

Fig. 30

in an exploded view the engine parts of the engine part, namely the fixed,

Fig. 31

the rotating motor parts of the motor part, also in a perspective exploded view,

Fig. 32

in perspective an application device for applying a solvent (binding material) with cleaning covering for cleaning windows or the like and

Fig. 33

a section in the area of the coupling point of the motor part and suction attachment.

The heart of the hand-held suction device is a motor part 1. Its housing 2, which also forms a cross-ribbed gripping handle, contains an electric motor 3 with a fan wheel 4. The motor-fan unit is part of a device package consisting of four components and forms the first component.

The motor-driven hand-held suction device is set up for connection to the mains voltage.

An interchangeable suction attachment S is assigned to the rod-shaped and thus easily accessible motor part 1. In addition, a snap-in connection is used.

The suction attachment S according to FIG. 1 is the second component of the device package. It is slender, pointed in shape and lancet-shaped in outline. It allows insertion into narrow, slit areas and inside corners. It is a suction attachment serving as a dust and crumb attachment with an integrated filter system. The corresponding filter F is a dust bag 5.

FIG. 3 shows, as the third component of the device package, a suction attachment S which has a more sectoral layout, with an approximately equilateral triangular length. The the side facing the motor housing 2 has the convex curvature.

This suction attachment S is used for window cleaning and is referred to as a so-called window attachment.

FIG. 9 is a variant of this suction attachment S, which here has a square or rectangular layout.

The two exemplary embodiments of the third component of the suction attachment S contain a filter system that is specially designed for cleaning glass panes.

The application unit for a dirt solvent shown in FIG. 32 functions as the fourth component of the device package.

The filter F in the form of said dust bag 5, which is adapted to the hand-held suction device, is relatively small, but is implemented as a folding body to enlarge its filter area, as can be seen in FIG. A zigzag fold runs along the two longitudinal edges of the dust bag 5. It can be a single bag. However, the dust bags 5 are preferably realized as an endless tube and can be separated by means of transverse tear-off perforation lines. The bag bottom 5 '' is taped, the neck 5 'only in the folding zone. Two floors 5 '' and two necks 5 'are directed towards each other. The dust bags 5 are lined with an inner fleece.

The dust bag 5 sits on a holder 6. The latter practically forms a filter container. The holder 6 is reversibly received in a pulpit-like grommet 7 of the correspondingly raised ceiling 8 of the suction attachment S according to the second component. Said spout 7 lies in the plane of symmetry of this suction attachment S, in Figure 3 in the bisector, except that this component receives a special filter system, designated F ', F''. Bracket 6 and pulpit-like grommet 7 engage in one another in a rotationally secured and stop-limited manner.

The holder 6, which can be inserted in a sled-like manner, is perforated centrally and forms a connecting piece 9 facing the motor 3. Its opening is oval in cross-section. The turn or wall of the oval on the working surface is of a smaller cross-sectional radius than the upper one (cf. FIG. 16).

The bracket 6 forms, seen in the direction of insertion, a vertically extending flange 10. On the nozzle side, this has a groove 11. The latter runs uninterrupted in the wall of the nozzle 9. The neck-like constriction thus created at the foot of the connecting piece 9 interacts with a clamping body 12. This has a clamping bar 13 engaging in the groove 11. As can be seen in the drawing in FIG. 15, two such clamping bodies 12 are realized. Their clamping strips 13 are used to clamp the dust bag 5 on the nozzle 9. For this purpose, they grip the gathered neck 5 'of the dust bag 5, which stops against the flange 10 (see FIG. 14). The clamping attack is indirect.

Because the bottom of the groove 11 is covered with a V-shaped, radially acting ring seal R made of rubber or the like. The neck 5 'of the dust bag enters the V-opening of the ring seal R supported on the flange 10. The protruding V-leg is pressed in by the clamping strips 13, ie it is folded in the direction of the other V-leg resting on the base of the groove 11. This also increases the clamping voltage on the interposed neck 5 '.

The clamping bodies 12 can be pivoted from a position (FIG. 14) essentially following the direction of extension of the connecting piece 9 into a transversely projecting unfolded position (FIG. 15). For this purpose, they engage the flange 10 in an articulated manner. The relevant hinge point is designated 14. It can be the classic hinge with a cast axis, as shown. However, more economical production in the form of a film hinge is preferred. The axes or hinge points running in a vertical plane diverge slightly towards the work surface. The angle is approximately 15 °.

On the upper side, the shell-like wall extensions 12 'of the clamping bodies 12, which are essentially adapted to the inner contour of the grommet 7, close the clamping bodies 12. For a better view of the interior of the holder 6, the clamping bodies 12 are at least in the area of the upper side of the holder 6 outside the clamping clamping zone with one towards the free end Provide bracket 6 diverging gap (see. Fig. 6). The interior of the zone circumscribed by the shell-shaped clamping bodies 12 leaves a sufficiently large annular gap 15 between the connecting piece 9 and the inner surface of the wall extensions for the development of the dust bag 5 (cf. FIG. 14). It can also be seen there that the clamping bodies 12 extend essentially over the length of the dust bag 5 that is attached.

Even a tip-like protrusion is preferred, which facilitates the removal, that is to say pulling off, of the filled dust bag 5 from the nozzle 9 carrying it.

The nozzle 9, however, is significantly shorter than the clamping body 12 plus wall extensions 12 '. In other words: the clamping bodies 12 continue as a protective nest wall into the zone which is no longer fully controlled by the support and stabilizing connection piece 9. The mechanical protection is effectively preserved there.

To make it easier to attach the dust bag neck 5 'to create an even additional sealing contact on the nozzle 9, the latter takes a conical taper towards the motor part 1. This cone on the jacket wall side can extend over the entire axial length of the connecting piece 9 (with the exception of the groove 11 receiving the ring seal R, of course). Specifically, however, an embodiment has been made in which a significantly increasing angle of inclination towards the groove 11 only begins practically half the length of the connecting piece 9, illustrated by a fillet line 16.

The aim of facilitating, centering attachment or continuous pushing on of the dust bag 5 also serves the further measure of not cutting the free end of the connector 9 perpendicularly to the longitudinal center plane or axis xx, but of laying the opening plane 17 skewed. This results in an exposed, yet convexly rounded tip zone 18 on the nozzle 9. The shape is comparable to an inclined steam chimney, but the chimney is perpendicular to the water surface in its longitudinal central axis. In addition, there is a further level inclination transverse to the normal direction of travel of the ship. There is therefore an opening plane 17 of the connecting piece 9, which extends up to an axis, here the longitudinal central axis of the connecting piece, at an acute angle of approximately 60 ° and downward one includes an obtuse angle of approx. 120 °. In addition, the axis encloses the obtuse or acute angle essentially in directions offset by 90 ° to one another, that is to say brings the skewed orientation mentioned. This is particularly clear from Figure 14. The transverse inclination of the opening plane 17 is consequently approximately 30 ° (see angle Alpha in FIG. 14) and the longitudinal inclination is likewise approximately 30 ° (see angle Beta in FIG. 18) with the result of the “tapering” (convexly rounded tip zone 18).

The further measure that a wing-like expansion element 19 extends from the outer opening edge 9 'of the connector 9 serves not only as an initial spreading aid, but also as a means of keeping the dust bag 5 in an assigned state. This points in the opposite direction to the dust bag 5 and is provided at least in pairs. These widening elements 19 are rooted in the broad-area sections of the approximately oval cross-section of the connecting piece 9. They are horn-like structures, the ends of which, however, are directed towards each other again after an outer arc to a dimension which is below the maximum clear dimension of the anther neck 5 'in this plane. lies. When plugged in, the clearly convex outer sides of the wing-like expansion elements 19 carry the end section of the dust bag 5 that is not carried by the connecting piece 9. They are semi-rigid, so they tolerate mechanical stresses that are customary in use without damage. The contact area of the expansion elements 19 is quite small. The area between the wing-shaped expansion elements 19 thus remains as the largest possible free filter area.

The nozzle 9, or its opening edge 9 'ends with a check valve 20. It is a matter of a rubber washer corresponding to the socket 9. Plastic with the corresponding properties can also be used. In the latter case, the check valve 20 could form an integral part of the connector 9 or even the entire holder 6. In the case of using a separate rubber washer lying on the end face of the nozzle opening edge 9 ', the classic one-sided fastening would be used. This is done by two fastening mandrels 21 located in the vicinity of one broad side of the essentially oval connecting piece 9. The latter project freely over the outer opening edge 9 'in the direction of extension of the connecting piece 9. They are shaped like arrowheads, so that adapted narrow hole edge sections of the rubber disk, ie the check valve 20 snap the corresponding undercuts of such mandrels. Two such spaced-apart fastening mandrels 21 bring the positional accuracy of the check valve 20 and further promote the retraction into the closed position. The check valve 20 can have a certain bias in this sense. It reaches an opening angle of 90 ° with only a 60 ° swivel path due to the arrangement on the 30 ° transverse inclined opening plane 17 (angle alpha). A bevel 9 ″ in the lower, more rounded region of the connecting piece 9 achieves a particularly easy-to-fold, jamming-free function of the check valve 29. Said bevel runs at an angle gamma of approximately 25 ° to the horizontal.

In all of the exemplary embodiments, there is a suction opening 22 in the end facing away from the motor part 1, that is to say the tip region of the suction attachment S, which continues directly into the suction line 23 directed towards the motor. The latter is located above a suction level 24, separated from the suction line 23 by an approximately Separation 25 running parallel to the suction plane 24, which is interrupted only in the said tip area to create the suction opening 22 mentioned.

In the tip region of the suction attachment S of the component according to FIG. 1 facing away from the motor, the suction opening 22 has an approximately triangular cross section, specifically following the lancet-shaped tapering zone.

In the sectoral suction attachment S according to component FIG. 3, the triangular tapering zone merges into a rectangular cross-sectional zone on the engine part side.

With regard to the dust and crumb attachment (FIG. 1), the flow cross sections are as follows: The flow cross section Q (FIG. 2) of the suction opening 22 in the front area of the bristle ring is approximately 760 mm 2, the cross section and height of the rear flow channel are c. 420 mm², height = 14 mm. The length of the same is twice the length of the triangular suction opening 22. When the suction opening 22 is approximately the same width as the surface area circumscribed by the rest of the bristle ring, the length ratio is approximately 1: 2 to 1: 3. The flow cross section Q 'of the nozzle 9 is 760 mm ² and corresponds to that of the suction opening 22, that is Q.

As far as the window attachment (Figure 3) is concerned, the flow cross section Q between the intake manifold and the working surface is approximately 1000 mm 2. The flow cross-section of the triangular working surface of the window attachment is 15,000 mm².

In both cases, the suction level 24 is limited by a peripheral, somewhat flared brush strip 26 as a wreath. The latter can leave gaps 27 have as a so-called suction window. The brush strips pointing downward are held in a shoe 28.

Each corner angle of the window attachment is less than 90 °.

The suction mouthpiece of the dust crumble attachment is designed so that the processing of two different areas of application is possible without manual switching. If the hand-held suction device according to FIG. 1 is guided onto an object in such a way that only the tip region 29 touches or lies above it, the object is suctioned off with full force and highly effectively via the suction opening 22. If, on the other hand, an application is selected under surface suction, in which the bottom of the suction attachment S completely covers the work surface, the suction force is distributed over the entire area covered by the suction attachment S, i.e. transition from the approx. 70 mm long suction opening 22 to the approximately 200 mm long, rear bristles. The bristles are longer in the area of the suction opening 22. The suction flow concentrates on the suction opening 22 and is fed to the suction bag 5 via the suction line 23 via a nozzle 9.

The application study of FIGS. 7 and 8 also illustrates a measure according to which the suction of objects is particularly effectively achieved by the length section of the suction attachment S extending to the rear, motor-side area losing its bristle wall circumscribing the suction apron by rear sections there of the brush strip 26 can be raised by a mechanism that is not described in more detail (FIG. 8), for example for selective suctioning, whereas FIG. 7 onto that of the larger area Surface suction is set by the brush strip position being lowered everywhere. The rear sections are lowered at the same height as the brush strip sections on the tip region side.

The partition 25 is at a distance from the underlying suction plane of an object, which corresponds in area to approximately the fifth part of the length of the tip region 29 (approx. 14 mm).

As long as the suction attachment S is not placed over the entire surface of a surface to be sucked, the full suction effect is practically only given in the front area.

The use of the hand-held suction device according to FIG. 3 for window cleaning is based on a special method in that a liquid which contains dust-binding constituents is applied to the window surface. This binding material is then allowed to dry on the window surface, the dust being bound by the constituents added to the liquid in such a way that a dried, lime-like substance remains on the window glass. This is then released using the window attachment (Figure 3) by manual polishing and vacuumed off. The window surface is then clean and streak-free.

The device shown in FIG. 32 is used to apply said binding fluid. The corresponding application unit has a sponge body 30. This sits in a cap-like housing 31. It is long, rectangular or has a sectoral design, but with the sector tip cut away. The sponge body 30 is removably assigned to the housing for occasional washing, preferably using an edge clamp connection.

From the ceiling of the angular housing 31, an angular handle 32 extends freely outward, as is the case with flat irons. The latter serves with its one angle leg as a handle and with its other angle leg as a receiving chamber for a cartridge 33 containing the binding liquid, for example as a concentrate. In this case, the pane surface would have to be moistened beforehand with water or a solvent. Cleaning snow is also conceivable. The binding liquid passes through the angle leg forming the handle as a feed channel 34 into a distribution trough 35. From this, guide channels radiate out, which open into the application surface of the sponge body 30 (not shown). By actuating a membrane of the cartridge 33, the binding liquid can be dispensed in doses. The membrane acts practically as a spray device in the manner of a pump dispenser. 33 can also be an actuating button for the metered emptying of the cartridge. It is also possible to use the receiving chamber itself as a tank.

Alternatively, a functionally and ergonomically equivalent solution consists in arranging the cartridge 33 in the feed channel 34 and the cartridge 33 or the tank in the handle running parallel to the housing 31.

The suction attachment S used to suck off the dried substance according to FIG. 3 contains a two-stage, partially regenerable filter system. Part of the same is a filter part F '. This acts as a prefilter. It is a body made of elastic, open-cell foam. The foam filter part itself is designated 36. Its sectoral shape, which is adapted to the outline of the window attachment, can be seen in FIGS. 24 and 28. It is a well-air-permeable skeletal foam that with its highly rugged interior structure provokes a highly effective dust deposit.

The pre-filter can be almost completely regenerated by rinsing with clear water. The foam part 36 is releasably clamped in a frame 37 of the window attachment. An inwardly directed clamping projection 38 starts from a contour-corresponding, cut-out wall of its frame 37 (cf. FIG. 25). The above-mentioned brush strip 26 is inserted between a central wall and an edge wall of the frame 37. The bristle ends pointing downward and the underside of the filter part F 'lie approximately on a common board level.

The foam part 36 is covered by a fleece 39. The fleece 39 is applied directly over the window surface, i.e. led the glass pane. It has a velor-like softness and is used for wiping and polishing. A blank can be used which allows a multi-layer wrapping of the foam part 36. Specifically, it is also a multi-layer non-woven fabric, which, as can be seen from the drawing, is quilted or welded. The quilting edge is called 39 '.

In the back, the foam part 36 welded into the cleaning fleece is supported by downward-pointing ribs 40 starting from the ceiling 8 of the suction attachment S (see FIG. 23). The ribs 40 create a kind of labyrinth. The fleece 39 has larger pores than the foam part 36 designed like a covered cushion.

The other component of this filter system is a filter sheet 41. The latter overlaps the filter part F '. It acts as the main or safety filter, called with F ''. As can be seen from the individual illustration in FIG. 26, this safety filter F ″ has the same surface shape as the filter part F ′. As a hygiene fine filter, it only separates the 10% to 20% fine dust that passes through the pre-filter. After saturation, the main filter must be replaced by a new filter sheet 41. The filter sheet 41 is included in the frame clamping and is framed by a cutting-like, downwardly directed terminal strip 42. Opposite it, the frame 37 has an upwardly open edge groove 43. The latter is filled with an elastic piping 44. The edge clamping of the filter cloth 41 is particularly clear from FIG. 25.

Gap-spaced from the terminal strip 42 runs a skirt-like, likewise downward-facing edge wall 45 with latching windows 46 distributed in the circumferential direction for latching tongues 47 on the frame side. The wall carrying the latching tongues 47 is designed in a crenellated manner. The crenellations point upwards.

The safety filter F '' is connected downstream of the filter part F 'in the flow direction. The suction opening 22 that opens the corresponding flow path is shown in FIG. 23. It is initially formed partially by a nose section shaped like a nose-like, upturned ceiling section 8 ′ of the ceiling 8 of the suction attachment S and partly by a portion 7 ′ of the nozzle 7 that is also shaped like a nose-bridge.

Through the manual polishing process, the dried cleaning substance is loosened with the bound dirt of the disc. The circumferential bristle ring also serves to protect the sensitive polishing surface and, when used in a targeted manner, enables brushing of the Marginal areas. When polishing, only air flows through the edge areas of the polishing surface. This prevents the detergent / powder from swirling or trickling down. In the middle of the polishing surface, it is deposited on the surface. If the suction attachment S is slightly tilted or lifted off, the air flow changes and the deposited powder is transported away into the interior of the foam part 36. In order to reduce the suction effect due to the primary polishing activity and to maintain the suction air flow, the gaps 27 prove to be particularly useful. On the machining side, the filter part F '/ safety filter F''unit protrudes slightly above the level of the bristle ring, but is pressed in at approximately the same height during machining.

Now what the coupling between the engine fan unit, i.e. Engine part 1 and the respective working attachment, two latching elements 48, 49 located at opposite points are used for this purpose.

The one locking element 48 sits on the motor part 1 and forms an actuating handle B, which is accessible from the outside and is at the top. It is an out-of-round push button, which has a counter-latch 50 on the suction attachment S of both components (FIGS. 1 and 3) on the top of the grommet 7 interacts. In design terms, this locking element 48 sits on a ring, referred to here as the engagement ring 51. The latter is part of the housing parts of the motor part 1 shown individually in FIG. 29. On the engagement ring 51 there are notches 52 in the area of the engagement element 48, starting from the inside of the ring educated. These take up the free ends of a leaf spring 85 as a return spring. The leaf spring 85 is supported in the middle in a stationary manner. The engagement ring 51 functions at the same time as a transmission part in such a way that when the first latching element 48 is actuated, the second latching element 49, which is seated in the suction attachment S, is set into a latching-ready position. For this purpose, the engagement ring 51 forms a vertical engagement finger 53 on the side diametrically opposite the first latching element 48, also starting on the outside of the engagement ring 51. The latter presses on the second locking element 49, which is designed in the form of a spring-loaded locking sleeve. The corresponding compression spring has the reference symbol 54 (see FIGS. 23 and 33). The second locking element 49, comparable to the locking of a locking cylinder, is supported by the compression spring 54 on the bottom of a pocket 55 of the suction attachment S. The cross-sectionally larger cylindrical section of the correspondingly stepped locking element 49 runs in it. The smaller cross-sectionally cylindrical section, as the actual locking head, passes through a cross-section-adapted bore 56 (FIG. 23) in a beard-like, downward-facing, anti-rotation attachment 57 of the spout 7. The attachment projects beyond the self-cylindrical one Section of the spout 7 clearly downwards and protrudes between two guide walls 58 (FIG. 23), which extend upward from the ceiling 8. When the actuating handle B is pressed in, the action finger 53 pushes the latching element 49 back out of its locking, protruding position. The plug-in joint 86 between the intake 60 and the spout 7 is free.

The connection on the motor housing side is formed by a plug-in projection 59 of a suction nozzle 60 (FIG. 29) corresponding to the clear overall nozzle contour with the plug-in space of the nozzle 7, which also corresponds to a rotationally securing projection 59 '. The action finger 53 extends through Congruent openings 59 '' and 59 '''of the plug-in projection 59.

The plug-in projection 59 has a recess 61 on the intake port side for the radial guidance of the unit locking element / actuating handle 48 / B and as an outward-facing limit stop lying congruently with the counter-latch 50. The first and the second locking element 49 are each assigned a run-up slope 87 or 88 for automatic locking.

The other, more or less visible, housing parts 2 of the motor part 1, viewed in FIG. 29, are seen from bottom left to top right: a grid 62, a fixing ring 63, the aforementioned engagement ring 51, the described intake manifold 60 , a motor capsule 64 and an end cover 65.

The stationary engine parts accommodated therein are illustrated in FIG. 30. They are called in increasing order from bottom left to top right: deflection stage 66, damping ring 67, holding disc 68, bearing 70, bridge 71, stator 72, two-part cover plate 73, quiver holder 74 for the carbon rods, bridge 75, motor cover 76, damping segment 77.

FIG. 31 shows the rotating motor parts, likewise from the bottom left to the top right, namely the already mentioned fan wheel 4, a rotor 78 and a slip-on disk 79 arranged on the side.

The grommet 7 is secured by means of a screw 69, shown in FIG. 22, screwed in from the underside of the partition 25 corresponding to the body 8, whose through hole 80 is shown in FIG. 5. A screw channel 81 extends congruently to the nozzle 7 itself, namely adjacent to the shoulder 57. Alternatively, according to FIG. 23, instead of the screw channel, an integrally formed mandrel extends downward. It engages in the through hole 80 and is secured from below by means of a claw ring.

Returning to the fleece 39, it remains to be stated: The fine powdery, lime-like substance of the binder is not problematic for the dust bag 5 when vacuuming, since the "particles" clogging the fine pores are caught in the preliminary area, namely in the upstream cushion, the so-called filter part F '. On the one hand, the fleece 39 dissolves the dried substance with the dirt and dust attached to it. A large part of the absorbed substance remains in the foam part 36. Only a small proportion, about 10% to 20%, gets into the dust bag 5. The filter cloth 41 additionally provided - as already indicated - acts as a safety filter F ''.

There is a socket seal 82 in the plug-in connection zone of the suction attachment S and the motor part plug-in projection 59.

The motor part 1 has a toggle switch 83 on the side of the housing foot for switching on the hand-held suction device. The associated power cord with plug is labeled 84.

The features of the invention disclosed in the above description, the drawing and the claims can be used both individually and in any combination the realization of the invention may be of importance. All the features disclosed are essential to the invention. The disclosure content of the associated / attached priority documents (copy of the prior application) is hereby also included in full in the disclosure of the application.

Claims (6)

Application unit, in particular for applying liquid or substances to window panes, characterized by a sponge body (30) accommodated in a housing (31). Applicator unit according to Claim 1, characterized in that an angular handle (32) which projects freely outwards is formed on the ceiling of the housing (31). Application unit according to Claim 1 or 2, characterized in that a receiving chamber for a cartridge containing a treatment agent is formed in one leg of the handle (32). Applicator unit according to one of claims 1-3, characterized in that a distributor trough (35) is formed in the sponge body (30) for receiving treatment agent dispensed from the cartridge. Application unit according to one of claims 1-4, characterized in that the cartridge is designed like a pump. Application unit according to one of claims 1-5, characterized in that the cartridge has a pump membrane.

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