DE3238814A1 - VACUUM CLEANER Mouthpiece - Google Patents

Description

Vacuum cleaner mouthpiece

description

The invention relates to a vacuum cleaner nozzle according to the preamble of claim 1.

It is known per se to have two in a vacuum cleaner nozzle or to provide several work tools that can be moved relative to one another, such as a brush nozzle and a Flat nozzles that can be alternately positioned against the surface to be processed. With such vacuum cleaner nozzles a work tool can often be actuated with the aid of a switching device which responds to the air pressure.

These known as so-called automatic vacuum cleaner mouthpiece devices operate satisfactorily _r however, the automatic setup bulky and expensive at the same time the cost price of the vacuum cleaner nozzle. In addition, the performance of the vacuum cleaner connected to the mouthpiece should not vary within too great limits. If, for example, the suction should decrease to an abnormal degree, then the negative pressure prevailing in the suction channel becomes too weak to bring about a switchover of the device described above.

The present invention aims to obviate these disadvantages and to provide an automatically operating vacuum cleaner nozzle to create in which the switching process takes place independently of the performance of the vacuum cleaner. That Vacuum cleaner mouthpiece should also be designed to be simple and cheap to manufacture, a compared to the conventional

union automatic vacuum cleaner nozzles have reduced height and do not require wheels.

To solve this problem, the features indicated in the characterizing part of claim 1 are proposed. Beneficial Refinements result from the features of the subclaims. According to a further advantageous feature of Invention can with the vacuum cleaner nozzle according to the invention the resistance to movement can be adjusted.

Further details, features and advantages of the invention emerge from the following description of a preferred one Exemplary embodiment based on the drawing, therein show:

Figure 1; a partial view of the invention

Vacuum cleaner mouthpiece in perspective view;

Figure 2 s a side view of the vacuum cleaner mouthpiece

kes when used on a hard, smooth floor surface;

Figure 3: the same mouthpiece when it's on a

Carpet is inserted and moved to the operator, and

Figure 4 s the mouthpiece shown in Figure 3, if

it moves in the opposite direction, i.e. away from the operator will.

The mouthpiece 10 has a pipe socket 11 with which it can be connected to a vacuum cleaner, not shown, via a hose, as well as a suction opening The pipe socket 11 is opposite the housing 13 of the mouthpiece 10 pivotally mounted and opens inside the mouthpiece in a suction channel whose free end over the Suction opening 12 is in communication with the work surface.

As can be clearly seen from FIGS. 2 to 4 of the exemplary embodiment shown, the suction opening 12 is limited at its front end and rear end by two edge parts, depending on the nature the work surface can assume different positions in relation to the mouthpiece housing 13. Like this As can be seen from FIG. 1, each edge piece consists of a substantially tubular body 14 which is inserted into the Side walls 15 and 16 of the mouthpiece 10 is pivotably mounted by means of a continuous shaft 17 “Approximately in the middle of the body 14 is a solid inner wall 18, which divides the interior of the body into two elongated halves, which are at their other end by external walls 19, 20 are completed. In each half there is a coil spring 21, 22, each spring with one End is attached to the inner wall 18, while the opposite End 23, 24 is mounted in recesses 25, 26 which are provided in the outer walls 19 and 20, respectively. The recesses 25 and 26 each have the shape of a quarter segment of a circle, the segments of a circle are arranged offset by 90 to one another. Corresponding recesses 25 'and 26 · are in the side walls 15 and 16 of the mouthpiece 10 is provided so that the recesses 25, 25 'and 26, 26' coincide in pairs.

The body 14 is mainly divided into three sectors, the first sector 27 of which carries a brush 28 or, alternatively, a strip of textile material for use on hard floors to be used. On each side of the sector 27 there is a sector 29 or 30 with a soft surface, and the sectors 29 and 30 are connected to the sector 27 by transition edges 31 and are soft Carpets used. The springs 21 and 22 are dimensioned in such a way that the body 14 only pivots if the resistance to movement of the

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moving mouthpiece exceeds a predetermined value, for example 2.5 kilograms. To avoid loss of suction air, each body is sealed against the housing 13 with a rubber coating (not shown) or the like. The mouthpiece according to the invention works in the following way.

On. hard floors is the resistance to movement when moving The mouthpiece is small and has less of the power of the elncjesleLlt.cn of feathers 21, 22 from to lioispie-1 2.5 kg * der The body 14 assumes the position shown in FIG. 2, which means that the brush 28 or the ToxtlImIrcjfen against the hard work surface, and removed by means of the negative pressure generated in the suction channel and the suction opening 12 Dust, threads and similar particles from the work surface.

If, on the other hand, the mouthpiece is moved on a carpet, like " this is shown in FIG. 3, that is, away from the operator, then the free ends 23 and 24 of the springs are located 21 and 22 towards the upper ends of the Aunspnrunqon 25 or 26, how dioa η I follow the figures 1 and 2 results, that is, that the spring 21 by the during dor Movement of the mouthpiece creates a sound of turbulence is stretched between the brush and the substrate. That The free end 24 of the spring 22 moves at the same time in the recesses 26 and 26 'of it upper clamping position to the position according to Figure 3, and the transition edge 31, which is between dom which sector 29 and sector 27 moves along the carpet. The brush no longer touches the carpet.

When the mouthpiece moves in the opposite direction is, that is, towards the operator, then the body 14 by the in the spring 21 in the previous Movement generated spring force to position gomHß Figure 2 to-

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swiveled back. The free end of the spring 24 is now at the upper end of the recess 26, and the resistance to movement overcomes the spring force of the spring 22 and pivots the body 14 into the position shown in FIG passing edge 31 along the carpet, which is arranged between the sector 27 and the woichon sector 30 1st. on in this way, the body 14 is through the UewegungswldersLand verachwunkt, which overcomes the spring force, and alternatively assumes the positions according to FIGS.

According to a further advantageous embodiment of the subject matter of the invention, it can also be provided that in a mouthpiece, a pivotable edge piece with a roller brush is arranged, which is located within the suction opening can turn. In such a case a swiveling handpiece would be arranged in the rear part of the nursing opening means looking in the direction of the operator to prevent that dust particles are thrown away by the brush roll.

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Claims (7)

PATENTANWÄLTE "KLAUS D. KIRSCHNER WOLFGANG GROSSE DIPL-PHYSICIST DIP L.-INGENI EU R APPROVED REPRESENTATIVE BEFORE THE EUROPEAN PATENT OFFICE HERZOG-WILHELM-STR. 17 _, ..,. ^„ - ^, D-8 MUNICH 2 Aktroluxebolaget CHARACTERISTICS: Sweden YOUR REFERENCE: OUR CHARACTERISTICS: OURREFERENCE: E 4'09 GS / SB date: October 20, 1982 Vacuum cleaner nozzle patent claims 1.) Vacuum cleaner mouthpiece with a suction opening and a pipe socket for attaching the mouthpiece to a vacuum cleaner by means of a hose, characterized in that at least one of the edge parts which the suction opening (12) limit and are arranged perpendicular to the working direction, depending on the nature of the work surface compared to the mouthpiece housing (13) in different Positions is movable. 2. Vacuum cleaner nozzle according to claim 1, characterized in that that the edge part is formed by a body '(14) which has a substantially tubular cross-section having and pivotable in the side walls (15, 16) of the Mouthpiece is stored. 32388H 3. Vacuum cleaner nozzle according to claim 2, characterized in that a portion of the surface of the body (14) is covered with a brush (28) or a textile material, while the remaining portion has a soft surface. 4. Vacuum cleaner nozzle according to claim 3, characterized in that the surface of the body (14) in three sectors is divided, of which one sector (27) carries the brush (28), while the sectors (29, 30) that lead to both Sides of the sector (27) are arranged, have soft surfaces and with transitioning edges (31) to the sector Connect (27). 5. Vacuum cleaner nozzle according to one of claims 2 to 4, characterized in that a spring (21, 22) is arranged in the mouthpiece (10) which pivots the body (14) in such a way that that the brush (28) arranged on one sector (27) rests against the work surface when the mouthpiece is moved on hard floors, while between the one sector (27) and the side sectors (29, 30) arranged overlying edge (31) rests against the work surface when the mouthpiece moves e.g. on a carpet and a certain resistance to movement has been overcome. 6. Vacuum cleaner nozzle according to claim 5, characterized in that that the spring provided in the mouthpiece (10) is divided into two halves, the spring parts (21, 22) with their inner ends at one inside the tubular Body (14) arranged wall (18) are attached, while the outer ends (23, 24) on the one hand in recesses (25, 26) of the outer walls (19, 20) of the body (14) and on the other hand in recesses (25 ', 26 ") in the side walls (15, 16) of the mouthpiece (10) are mounted, and wherein cover the recesses in pairs. 7. Vacuum cleaner nozzle according to claim 6, characterized in that that the recesses (25, 26; 25 ', 26') each have the shape of a quarter circle segment and against each other are offset by 90.