FI66742C - GOLVSKOETSELAPPARAT SPECIELLT DAMMSUGARE MED FRIBAERANDE SKUMPLASTHUS - Google Patents

Description

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Patent- och ragiatarttyraitan '' ------ γ 31.08.84 (32) (33) (31) W «r forte— ligM frtorta 01.09.76 Federal Republic of Germany-Förbundsrepubliken

Germany (DE) P 2639333.9 (71) Vorwerk 6 Co. Interholding GmbH, Muhlenweg 17 "27, 5600 Wuppertal 2, Federal Republic of Germany-FörbundsrepublIken Tyskland (DE) (72) Wieland Giihne, Remscheid, Egon Paschhoff, Ingo Klöcker,

Ennepetal, Federal Republic of Germany1ta-Förbundsrepubliken Tyskland (DE) (74) Oy Kolster Ab (54) Floor care device, in particular a vacuum cleaner with a free-standing foam housing - Golvskötselapparat, speciellt dammsugare, med fri-bärande skumplasthus

The invention relates to a floor care device, in particular a vacuum cleaner with a free-standing foam housing with a shock- and sound-absorbing, two-part jacket, inside which a motor-blowing unit is placed and the wall of which is reinforced.

Devices are known in which a fully enclosed motor-blowing unit, which leaves only the air inlet and outlet open, is fixedly placed in a thick foam cover extending from the complete enclosure of the motor-blowing unit to the outer casing.

DT Publication No. 1,090,404 discloses a vacuum cleaner in which a motor fan embedded in a semi-rigid foam is housed in a completely closed but still hard plastic outer shell.

Also known from DT application 1,503,880 is a vacuum cleaner having a structure as described above.

2 66742 The disadvantage of both of these devices is, as with conventional vacuum cleaners, the hard plastic outer shell in which the motor-blowing unit is completely embedded in the foam. However, this requires expensive sealing in the area of the foam so that the rotating motor fan parts, such as the rotor and the fan wheel, can move freely. The vacuum cleaner thus manufactured requires more raw material and becomes more expensive than a conventional vacuum cleaner, nor does it have a direct support frame, because the support function is provided by either a hard outer shell or a hard motor fan cover.

DT Publication No. 1,403,623 discloses a floor vacuum cleaner which has an elastic outer shell and which carries itself thanks to a semi-rigid foam. Here, too, the filter and the motor blower unit are completely surrounded by a hard outer shell, so here too an expensive seal is required so that the penetrating foam does not impede the movement of the rotating parts. This also increases the material and construction costs of the device.

DT Publication No. 1,296,759 further discloses a vacuum cleaner having a softly resilient outer shell which is a seamless material and in the walls of which a support frame preformed from sheet metal or plastic is placed. In this device, too, the foam surrounds a completely enclosed motor blowing unit located inside a housing filled with foam.

Here again, the disadvantage is that the amount of foam increases the weight of the device and the motor blowing unit requires a complete seal.

It is an object of the invention to provide a vacuum cleaner with a soft resilient outer shell and a support frame which is very light in construction but which, together with a thin-walled foam-plastic housing and motor fan cover, provides electrical and mechanical safety so that such a housing can be manufactured more economically.

According to the invention, this object is achieved by placing a protective reinforcement inside the thin shell of the foam housing, that the motor blower has a motor fan cover in the areas of the wall openings and that the protective reinforcement has openings in the areas of the motor fan cover for mutual foaming.

66742

In order to make the floor treatment device as easy and cost-effective as possible, a cavity is arranged between the foam housing and the motor blower device in the areas of the wall openings and the motor fan cover.

In particular, this solution has the advantage of providing a light vacuum cleaner housing which still combines all the electrical and mechanical properties required of such devices. In addition, it is cheaper to use and thus more cost-effective than conventional foam-filled vacuum cleaners. An additional advantage is the free interior space, so the motor blower unit no longer needs to be sealed against foam, but can be installed separately with all its covers. Only when both components are connected together does it form a sturdy and electrically safe device.

An embodiment of the invention is shown in the accompanying drawing, and will be explained in more detail below in connection with a hand-held vacuum cleaner equipped with a filter.

Fig. 1 is a schematic front view of a vacuum cleaner according to the invention, in which the protective reinforcement with its openings is shown in cooperation with the cover of the motor blowing unit.

Fig. 2 is a schematic side view of the vacuum cleaner of Fig. 1 with the necessary cover.

As can be seen from Figure 1, the thin shell 9 of the vacuum cleaner 12 consists of a protective reinforcement 1 with large openings 4 in the upper part and small openings 6 in the lower part, through which plastic foam 13, in particular PU foam, penetrates, allowing similar double flotation 7. In this way, a hollow foam housing 2 is formed on the inside, in which the motor blowing device 3 is placed. Viewed from the front of the device, the motor blowing device 3 is located in the foam housing 2 so that a cavity 8 is formed on each side between it and the housing 9. A thin, sharp object 9 could now pierce parts. To prevent this, a motor fan cover 5 as well as 4 66742 plastic insulation 14 are arranged at the points of the motor blowing device which would then be touched, which guarantee the electrical safety of the device against said contact at this point. The jacket reinforcement 1, which is not perforated here, immediately protects the free points 10 of the motor-fan cover 5.

In the side view according to Fig. 2, a thin shell 9 is formed only of foam, while the motor blowing device 3 is completely surrounded by a motor fan cover 5. A mold 11 is also cast here between the two components 2 and 3.

The device with the features according to the invention saves considerable raw material, while ensuring its mechanical and electrical safety and preserving the advantages of a sound-absorbing, soft resilient outer shell.

Claims (2)

5,66742 Floor care device, in particular a vacuum cleaner with a free-standing foam housing (2) with a shock- and sound-absorbing, two-part jacket, inside which a motor-blowing device (3) is arranged and the wall of which is reinforced, characterized in that the foam housing (2) a protective reinforcement (1) is placed inside the thin housing (9), that the motor blower device (3) has a motor fan cover (5) in the areas of the wall openings (4) and that the sieve reinforcement (1) has double flotation (7) in the areas of the motor fan cover (5) for the openings (6). Floor care device according to Claim 1, characterized in that a cavity (8) is arranged between the foam housing (2) and the motor-blower device (3) in the areas of the wall openings (4) and the motor-fan cover (5).