DE102013109469A1 - Floor nozzle for a vacuum cleaner - Google Patents

Abstract

The invention relates to a floor nozzle (7) for a vacuum cleaner (1), with a suction chamber (13) delimited in the feed direction (r) by limiting means (16, 17), for example by skids, front and rear, wherein inside the suction chamber (13) optionally a rotatable brush is arranged, wherein at least one limiting means (16) is vertically movable and in response to a change between a forward and backward movement of the floor nozzle (7) is automatically raised or lowered, further in the course of a change relative movement within the floor nozzle (7) occurs and this is used for vertical movement of the limiting means (16) or the vertical movement takes place by a standing in cooperation with the ground on which the floor nozzle (7) movable probe. In order to further improve a floor nozzle of the type in question, in particular with regard to the handling in a suction processing, it is proposed that a vertical position of the limiting means (16) can be fixed.

Description

The invention relates to a floor nozzle for a vacuum cleaner, with a in the feed direction by limiting means, for example by skids, front and rear delimited suction chamber, wherein within the suction space optionally a rotatable brush is arranged, wherein at least one limiting means is vertically movable and in response to a change between a forward and backward movement of the floor nozzle is automatically raised or lowered, further in the course of a change, a relative movement within the floor nozzle occurs and this is used for vertical movement of the limiting means or the vertical movement through a in cooperation with the ground on which the floor nozzle movable, standing button is done.

Floor nozzles of the type in question are known. These find particular use in the form of attachment nozzles or attachments in electric motor-operated vacuum cleaners, especially household vacuum cleaners. In particular, for the front and rear boundary of the suction chamber to be cleaned ground limiting means are preferably provided in the usual direction of displacement of the floor nozzle before and behind the suction chamber or formed in the nozzle bottom suction means, which act in particular against the ground to be cleaned. Such limiting means are for example formed in the region of the nozzle base skids. Alternatively, as further preferred, such limiting means are preferably bristle strips or sealing strips aligned transversely to the usual displacement direction of the floor nozzle, for example in the form of a sealing lip. At least one limiting means, in this case preferably the front limiting means considered in the usual direction of travel, can be raised, for example, for improved absorption of coarse dirt and can be lowered to increase the negative pressure in the area of the suction mouth, in particular under support on the soil to be cleaned. In this regard, solutions are known in which a raising and lowering of the limiting means can be brought about manually by the user. The raising and lowering of both limiting means is known in this context.

A simplification is given in a known manner in that the raising and lowering of the limiting means takes place in response to a forward and backward movement of the floor nozzle. As a result, an automatic displacement of the limiting means in the course of Saugabreinigung the soil is reached. The automatic switching of the limiting means or the limiting means takes place in a known manner by a relative movement within the floor nozzle, in particular by a movement of the floor nozzle relative to the attacking and connected to this vacuum cleaner. Next is from the EP 1713370 B1 known, for example, one of the limiting means, in particular the rear in the usual displacement direction limiting means in the form of a function of the running forward and rückschwenkbaren push button, which via a mechanism, for example via a Bowden cable or the like in response to the forward and reverse movement of the floor nozzle which preferably raises or lowers front limiting means. The button is supported in the usual working position of the floor nozzle on the floor to be maintained or cleaned.

In view of the known prior art, a technical problem of the invention is seen in a floor nozzle of the type in question, in particular with regard to the handling in a suction processing to further improve.

A possible solution of the problem is given according to a first idea of the invention in a floor nozzle, in which it is geared to that a assumed vertical position of the limiting means can be fixed. The assumed vertical position is preferably either the raised position of the limiting means or the lowered and in this case preferably resting on the ground to be cleaned off position. This concerns in particular in the usual direction of movement of the floor nozzle, in which the user pushes the vacuum cleaner with the floor nozzle in front of him, front limiting means. However, a plurality of limiting means, in particular a suction mouth in the direction of movement at the front and a suction mouth in the direction of movement delimiting the rear can be provided at the same time vertically displaceable. The respective vertical position as a function of a change between a forward and a backward movement or vice versa can be fixed, is accordingly not solely dependent on the relative position of floor nozzle to vacuum cleaner or the deflection position of the button. Although the relative displacement of floor nozzle to vacuum cleaner or the displacement of the probe in the course of a change in direction of movement leads to the associated vertical displacement of the limiting means. The fixing of the same leads advantageously to minimum movements, such as vibrations, which can occur, for example when crossing joints of tile floor coverings, the vertical position of the limiting means remains stable. A change in the vertical position, ie corresponding to a change from the lowered position in the Raised position or vice versa is preferred only according to intentional directional displacement of the floor nozzle by the user brought about.

In this case, it is further preferable to overcome a resistance which cancels the fixing of the limiting means. The case to be overcome holding force is preferably chosen so large that a repeal of the setting can not be lifted only by example, vibrations in the course of soil care, but can be canceled only by a volitional change in direction of the floor nozzle.

Further features of the invention are explained below, also in the description of the figures, often in their preferred association with the subject matter of claim 1 or with features of further claims. But they can also be in an assignment to only individual features of claim 1 or the respective further claim or each independently of importance.

Thus, in a preferred embodiment, that a movement effect on the limiting means at least partially via a linkage, optionally with the interposition of other transmission means, such as a Bowden cable, and that the linkage associated with a raised and / or lowered position of the limiting means with respect to a trained in the floor nozzle linkage stop can be fixed. Accordingly, it is preferably not the immediate determination of the limiting means, which is also possible in an alternative embodiment, but rather an indirect determination of the same provided. This purpose is served by the linkage acting on the fastener or a portion of the linkage. The latter preferably cooperates with a chassis-side stop of the floor nozzle, which stop in particular limits the vertical displacement path from the lowered position to the raised position or vice versa. In the area of cooperation between the boom and the boom stop, it is intended to fix the boom and thus the limiting means. Further preferably, corresponding stops are provided in both displacement directions of the linkage, which further preferably allow a corresponding fixing. The linkage is further preferably acted upon by the displaceable when changing direction switch or in response to a relative displacement between the nozzle and vacuum cleaner.

The fixing can be achieved for example by a catch. It is preferred in this regard that the fixing can be achieved by a magnetic attachment. Thus, in particular, one of the fixing partners (linkage or linkage section or linkage stop) is preferably provided with a permanent magnet or permanently magnetically adjusted, while the other partner is in particular a metal part. Preferably, in this regard, the cooperating with the rod stop rod section is provided with a magnet, more preferably, the linkage stop is formed by a U-shaped metal part, between the U-legs of the rod provided with the magnet linkage limited stop is movable. In one or the other stop position according to the force acting on the limiting means linkage portion adheres to the associated leg of the linkage impact.

Also, the fixing can be achieved by the action of a bi-stable spring on the rod. Such a bi-stable spring is, for example, a leaf spring inserted in the chassis of the floor nozzle, which is installed in a prestressed position. This shows according to the force curve when pressed, d. H. with a corresponding displacement of the linkage, a bi-stable endpoint fixation on. Thus, the leaf spring in a preferred embodiment in a, a fixed position corresponding installation position is curved running installed. An actuation of the leaf spring by the linkage as a result of a reversal of direction of the floor nozzle leads to a folding of the leaf spring in an oppositely curved orientation thereof, which in turn is stable.

The invention will be explained with reference to the accompanying drawing, which illustrates only one embodiment. A part that is explained only with respect to one of the embodiments, and in another embodiment due to the special feature there is not (just) replaced by another part, is thus described for this further embodiment as possible anyway existing part. On the drawing shows:

1 in perspective view a floor nozzle, connected to a vacuum cleaner;

2 the schematic section along the line II-II in 1 representing the floor nozzle in the course of a feed movement; relating to a first embodiment;

3 one of the 2 corresponding representation, but concerning the push-back movement;

4 one of the 2 corresponding representation, however, concerning a second embodiment;

5 one of the 4 corresponding representation, concerning the return movement of the floor nozzle.

Shown and described is first with reference to 1 a vacuum cleaner 1 , in particular a handle-guided, household electric vacuum cleaner. This first has a basic housing 2 on, with a blower motor, not shown.

The blower motor builds during operation of the vacuum cleaner 1 a suction air flow, which within the basic housing 2 through a suction channel to one, preferably in a filter chamber 3 installed filter bag leads.

At the basic housing 2 is a management stalk 4 attached, which end a handle 5 wearing. In the area of the handle 5 runs a power cord 6 a, for power supply in particular the fan motor, in addition, if necessary, also other electrical or electronic components.

On the vacuum cleaner 1 is one over the vacuum cleaner 1 leading floor nozzle 7 connected. This is an electrically operated floor nozzle in the illustrated embodiments 7 with an electric motor drivable bristle roller 8th ,

The floor nozzle 7 has one around, preferably transverse to a conventional direction of displacement of the floor nozzle 7 aligned axis pivotally mounted on the chassis 9 the floor nozzle 7 fixed connection section 10 on. This serves for the coupling receiving a vacuum cleaner side connecting piece 11 ,

Through the connection piece 11 the vacuum cleaner side suction channel is guided, which is when connecting the floor nozzle 7 to the connecting piece 11 in a bottom nozzle side Saugkanalabschnitt 12 extended.

The suction channel section 12 extends from the terminal section 10 starting in one of the connection section 10 opposite front area of the floor nozzle 7 , here preferably in a suction room 13 opening out.

The suction room 13 preferably extends transversely to a conventional displacement or displacement direction of the floor nozzle 7 , penetrates the nozzle bottom 14 under the formation of a suction mouth 15 ,

The latter is more preferably penetrated by the bristle roller B.

Viewed in the feed direction r preferably extends both along the front and along the rear edge of the suction mouth 15 or in direct association with these marginal edges in each case a limiting means 16 . 17 , These are preferably bristle or rubber lip strips.

The viewed in the feed direction r rear limiting means 17 is preferably fixed, ie in particular not vertically displaceable vertically in the region of the nozzle bottom during operation 14 attached.

The viewed in the feed direction r front limiting means 16 on the other hand, it is preferably displaceable in the vertical direction, in particular from a lowered position, in which the latter as well as the fixed limiting means 17 the suction mouth 15 in the direction of the soil to be cleaned 18 limited, in a vertically raised position, in which the limiting means 16 to the ground 18 is distanced.

The lowered position of the limiting means 16 leads to a relatively high negative pressure in the area of the suction mouth 15 , which is characterized in particular with respect to a good dust absorption from cracks or the like.

The vertically raised position of the limiting means 16 is preferably used for coarse dirt absorption. Accordingly, the coarse dirt recording is the limiting means 16 lifted like a lock, resulting in a corresponding increase in the volume flow in the region of the suction mouth 15 leads.

The vertical displacement of the limiting means 16 is preferably derived from the by the user of the vacuum cleaner 1 induced change between feed direction r and reverse direction r '. For this purpose, in one possible embodiment, the floor nozzle 7 in the course of a change of direction relatively displaceable relative to the vacuum cleaner 1 , This is schematically in the illustrations through the slot guide 19 implemented.

The relative displacement in the course of a change of direction of feed direction r in the reverse direction r 'or vice versa, is via a lever 20 one on the chassis 9 stored linkage 21 transfer. Here is the lever 20 one end preferably with a section of the vacuum cleaner side connecting piece 11 or with this receiving connection section 10 the nozzle 7 connected.

The linkage 21 is designed in the illustrated embodiment with respect to a vertical section substantially L-shaped, with a shorter L-leg, to which the lever 20 attacks and a longer L-leg, which extends over the suction chamber 13 extends and ends the limiting means 16 detected.

The linkage 21 is pivotable in the chassis 9 stored, wherein a pivot axis x transverse to the feed direction r. The pivot axis x is also preferred in the corner of the L-shaped linkage 21 positioned.

A forward or backward displacement of the lever 20 due to a relative displacement of the vacuum cleaner 1 to the floor nozzle 7 at a change of direction leads to a corresponding pivotal displacement of the linkage 21 and thus to a lowering or lifting the on the linkage 21 supported limiting means 16 ,

So it is preferred that in the course of a conventional displacement of the floor nozzle 7 in the feed direction r the lever 20 so on the linkage 21 acts, that this results in a substantially vertically raised position of the limiting means 16 as shown in 2 results. So is in accordance with a procedure of the floor nozzle 7 to the front a coarse material intake from the ground 18 reachable. In the raised position, a lower peripheral edge of the limiting means closes 16 at least approximately with the bottom of the nozzle plate 14 from. The possible vertical displacement of the limiting means 16 is denoted by a.

In a return movement in the direction r 'according to 3 the lever works 20 pulling on the linkage 21 which leads to a corresponding lowering of the limiting means 16 towards the ground 18 due to a pivotal displacement of the linkage 21 leads (compare 3 ).

In this position is in the operation of the vacuum cleaner 1 in the area of the suction mouth 15 an increased negative pressure achievable, in particular for improved deep cleaning of the soil to be cleaned 18 ,

The two vertical end positions of the limiting means 16 (lowered position or raised position) are preferably defined by a stop limit. For this purpose, in a preferred embodiment, the shorter L-leg of the linkage acts 21 with a linkage stroke 22 together. This is preferably formed according to a vertical cross-section U-shaped metal part, which is mounted on the chassis side. The free end of the linkage present engages the U-opening, more preferably this free end of the linkage 21 is set permanent magnet or is provided with a permanent magnet.

Accordingly, the leg of the linkage 21 in the respective stop position on the facing U-legs of the linkage impact 22 magnetically arrested, so that accordingly this vertical position of the limiting means 16 is fixed.

The case achieved holding force is sufficient to the limiting means 16 in the fixed vertical position even with shocks, for example, when driving over tile joints to secure. This holding force is preferred in a change of direction and this corresponding action of the lever 20 on the linkage 21 overcome.

The 4 and 5 show an alternative embodiment in which the lever 20 on a bi-stable spring 23 acts in the form of a leaf spring. This spring 23 is clamped between a short L-leg of the linkage 21 and a chassis-side chuck 24 , Here, more preferably, the leaf spring is installed biased so that it follows a curve in both stable end positions following.

By appropriate action on the spring 23 according to the lever displacing during a change of direction 20 becomes the spring 23 from the one stable position over the state of an at least approximately extended position thereof pressed or pulled in the opposite stable position, this along with a corresponding pivotal displacement of the linkage 21 and further corresponding vertical displacement of the limiting means 16 ,

All disclosed features are essential to the invention. The disclosure of the associated / attached priority documents (copy of the prior application) is hereby also incorporated in full in the disclosure of the application, also for the purpose of including features of these documents in claims of the present application. The subclaims characterize in their optionally sibling version independent inventive developments of the prior art, in particular to make on the basis of these claims divisional applications.

LIST OF REFERENCE NUMBERS

1

vacuum cleaner

2

Headers

3

filter chamber

4

management style

5

handle

6

power cable

7

floor nozzle

8th

bristle roller

9

chassis

10

connecting section

11

Support

12

suction channel

13

suction

14

nozzle bottom

15

saugmund

16

limiting means

17

limiting means

18

ground

19

Slot guide

20

lever

21

linkage

22

linkage stop

23

feather

24

chuck

a

 Verlagerungsmaß

r

 feed direction

r '

 Rear thrust direction

x

 swivel axis

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• EP 1713370 B1 [0003]

Claims (4)

Floor nozzle ( 7 ) for a vacuum cleaner ( 1 ), with an in the feed direction (r) by limiting means ( 16 . 17 ), for example by skids, front and rear delimited suction chamber ( 13 ), wherein within the suction space ( 13 ) optionally a rotatable brush is arranged, wherein at least one limiting means ( 16 ) is vertically movable and in response to a change between a forward and backward movement of the floor nozzle ( 7 ) is automatically raised or lowered, wherein further in the course of a change, a relative movement within the floor nozzle ( 7 ) and this for vertical movement of the limiting means ( 16 ) or the vertical movement through one in cooperation with the ground on which the floor nozzle ( 7 ) is movable, standing button is carried out, characterized in that a assumed vertical position of the limiting means ( 16 ) can be fixed. Floor nozzle according to claim 1 or in particular according thereto, characterized in that a movement action on the limiting means ( 16 ) at least partially via a linkage ( 21 ) and that the linkage ( 21 ) associated with a raised and / or lowered position of the limiting means ( 16 ) with respect to one in the floor nozzle ( 7 ) trained linkage stop ( 22 ) can be fixed. Floor nozzle according to one or more of the preceding claims or in particular according thereto, characterized in that the fixing can be achieved by a magnetic attachment. Floor nozzle according to one or more of the preceding claims or in particular according thereto, characterized in that the fixing by the action of a bistable spring ( 23 ) on the linkage ( 21 ) is reachable.

Images