DE102015121733B4 - Household appliance, in particular attachment for a vacuum cleaner - Google Patents

Abstract

Household appliance (1), in particular attachment (2) of a vacuum cleaner (3), - with a housing part (4) which has a housing underside (4a), - with a support means (5), - with a support means carrier (6) with is connected to the housing part (4) and on which the support means (5) is arranged, the support means carrier (6) being movable relative to the housing part (4) between a first end position (1) and a second end position (11), the Supporting means (5) on the underside (4a) of the housing in the second end position (11) protrudes maximally and in the first end position (1) less than in the second end position (II) or not at all, and- with a movement limiting means (7) which is between an active position (A) in which there is a movement of the support means carrier (6) in the direction from the first end position (1) to the second end position (II) in an intermediate position (III) between the first end position (I) and the second end position ( 11) limited, and an inactive position (B) be is movable, in which it allows a movement of the support means carrier (6) from the first end position (1) to the second end position (11), characterized in that- the movement limiting means (7) has a spacer (8) which in the active position (A) is arranged vertically above a stop section (9) of the housing part (4) and is mounted on this, - in the active position (A) at least one section (10) of the support means carrier (6) is vertically above the spacer (8) and is mounted on this, and- in the inactive position (B) the at least one section (10) of the support means carrier (6) can be mounted vertically above the stop section (9) of the housing part (4) and on this.

Description

The present invention relates to a household appliance, in particular a vacuum cleaner attachment, with a housing part which has a housing underside, with a support means, with a support means carrier which is connected to the housing part and on which the support means is arranged, the support means carrier being relative to the housing part is movable between a first end position and a second end position, the support means protruding at the housing underside in the second end position to a maximum extent and in the first end position less than in the second end position or not, and with a movement limiting means which can be moved between an active position in which it limits movement of the support beam in a direction from the first end position to the second end position in an intermediate position between the first end position and the second end position, and is movable to an inactive position by allowing movement of the support beam from the first end position ion up to the second end position.

The invention also relates to a household appliance, in particular a vacuum cleaner, containing a household appliance as an attachment.

In the context of the invention, a household appliance is understood to mean, for example, an attachment of an electrical device for the suction treatment of surfaces, e.g. in the form of a nozzle, or the entire device for the suction treatment of surfaces. An example of such a device, also referred to below as a household device, is a vacuum cleaner. Here, a so-called floor nozzle is used for suction treatment of floor coverings, in particular hard floors or carpets. In principle, upholstery or the like can also be vacuumed in the so-called above-floor area with the household appliances or attachments of the generic type.

Basically, for the purposes of the present invention, the term household appliance not only refers to vacuum cleaners or attachments for vacuum cleaners, but also includes any form of household appliance, in particular electrical ones, for example appliances for cleaning window panes or the like. Nevertheless, in the following, since this is the preferred application, reference is primarily made to vacuum cleaners as an example. In the context of the invention, the term vacuum cleaner is not limited to electric household vacuum cleaners, but also includes automatically movable devices, in particular floor cleaning robots.

Attachments for devices as described above, such as vacuum cleaners, are often designed for a special surface to be cleaned, i.e. there are, for example, special attachments that are specially designed for vacuum processing of carpets, and other attachments that are specially designed for vacuum processing of hard floors are. Floor nozzles are also known from the prior art, which are adjustable and thereby enable the cleaning of different floor coverings and/or cleaning with different intensity.

An adjustment is made, for example, by changing the ground clearance of the underside of the housing in the area of the suction mouth. In this way, if necessary, the user can optimize the intake of coarse material or fine dust, especially from joints.

From an internal state of the art it is known, for example, to mount the chassis, ie a supporting lower housing part, of a vacuum cleaner attachment in one section on a support roller which is pivotably connected to the chassis via a support means carrier. The support means carrier can be pivoted about a pivot axis that extends parallel to the underside of the housing and thus parallel to the surface to be cleaned. In one end position of the support means carrier, hereinafter referred to as the second end position, the support roller protrudes to the maximum extent on the underside of the housing, so that the distance between the suction mouth and the surface to be cleaned is also maximum. When the support means carrier is moved into another end position, hereinafter referred to as the first end position, the support roller can be moved back so far into the housing that the distance between the suction mouth and the surface to be cleaned is minimal. In the retracted position of the support roller, ie when the support means carrier is in the first end position, the underside of the housing rests on the surface to be cleaned, for example via a brush strip.

To clean certain surfaces, in particular hard floors that are prone to scratching, the support means carrier is moved into the second end position in order to prevent the underside of the housing from coming into contact with the surface to be cleaned. In the case of heavy soiling or coarse material or fine dust that has accumulated deep in the joints, it may happen that the suction effect in the area of the suction mouth is not sufficient to achieve an optimal cleaning effect when the support roller is in the maximum extended position. For this case it is known to move the support means carrier into an intermediate position between the first end position and the second end position, whereby the support roller is less than in the second end position of the Support means carrier protrudes on the underside of the housing and thereby the distance between the suction mouth and the surface to be cleaned is reduced somewhat.

In order to adjust the support means carrier together with the support roller between the individual positions (first end position, intermediate position, second end position), the known attachment has an actuating device comprising a motor, which is connected to the support means carrier and interacts in such a way that a movement of the actuating device is complete or is only partially transferred to the support means carrier and this is correspondingly pivoted about its pivot axis into the second end position or the intermediate position. For this purpose, the motor is connected to a spindle on which a spindle nut designed as a hollow shaft with an internal thread is arranged so that it can move axially. Depending on the direction of rotation of the spindle, the spindle nut is moved axially forwards or backwards. The spindle nut is in turn resiliently mounted in a spring element, which has a spring mount rotatably connected to the support means carrier and a helical compression spring mounted in the spring mount. The spindle nut has a radially circumferential collar on the outside and the spring receptacle has a base that extends radially on the inside and through which the spindle nut protrudes. The helical compression spring is arranged between the collar and the floor.

If the spindle is now moved in such a way that the spindle nut moves in the direction of the bottom of the spring mount, the movement of the spindle nut is transmitted via the helical compression spring to the spring mount, which in turn transmits the movement further to the support means carrier. When the spindle moves in the opposite direction of rotation, the spindle nut is moved back accordingly, with the spindle nut having a driver on its end facing away from the spindle, which during the return movement comes into contact with the spring mount on the outside in the area of the floor and thus the spring mount and accordingly also moves back the proppant carrier.

In order to bring the support means carrier into the intermediate position and hold it there, a slide is movably mounted in the chassis and has a contact surface pointing towards the surface to be cleaned. In this position of the slide, a pivoting movement of the support means carrier caused by the actuating device is blocked in the intermediate position, in that the protruding section of the support means carrier comes into contact with the contact surface of the slide. Since the actuating device is configured in such a way that during operation it always causes a stroke (axial movement path of the spindle nut) that is suitable for moving the support means carrier from the first end position to the second end position, but the support means carrier in the intermediate position by the slide can be blocked, in this case the helical compression spring is compressed in the spring retainer.

The problem here is that the hardness of the spring is often such that the forces acting on the spring element are not dissipated by the spring, spindle and spindle nut, but via the support means carrier and the slide. As a result, the slide linkage in which the slide is mounted and the chassis are deformed. All components in the flow of forces (prop carrier, slide, slide gate and chassis) act as a "spring" due to their geometric shape and elasticity of the material. This in turn has the consequence that unintentionally an uncontrollable, further stroke is released. An exact setting of a defined ground clearance when the support means carrier is in the intermediate position is therefore not possible.

Furthermore, the DE 34 05 058 A1 a household appliance, namely a vacuum cleaner, with a housing part that has a housing underside, a support means in the form of a brush strip and a support means carrier, the support means carrier resting on an eccentric, via which it moves vertically between a first end position via an intermediate position to a second end position is adjustable. Here is the proppant carrier DE 34 05 058 A1 always on the eccentric and there is no position in which the support means carrier is not mounted directly on the eccentric. Furthermore, a vacuum cleaner is known from US 2001/0 000 830 A.

It is therefore an object of the present invention to further develop a household appliance of the type mentioned at the outset in such a way that a more precise setting of a defined ground clearance is made possible.

• - mit einem Gehäuseteil, insbesondere Chassis, der eine Gehäuseunterseite (der zu reinigenden Oberfläche zugewandte Gehäuseseite) aufweist,
• - mit einem Stützmittel, insbesondere einer Stützrolle,
• - mit einem Stützmittelträger, der mit dem Gehäuseteil verbunden ist und an dem das Stützmittel angeordnet ist, wobei der Stützmittelträger relativ zu dem Gehäuseteil zwischen einer ersten Endposition und einer zweiten Endposition bewegbar, insbesondere schwenkbar, ist, wobei das Stützmittel an (relativ zu) der Gehäuseunterseite in der zweiten Endposition maximal und in der ersten Endposition weniger als in der zweiten Endposition oder nicht hervorsteht, und
• - mit einem Bewegungsbegrenzungsmittel, das zwischen einer aktiven Position, in dem es eine Bewegung des Stützmittelträgers in Richtung von der ersten Endposition zur zweiten Endposition in einer Zwischenposition zwischen der ersten Endposition und der zweiten Endposition begrenzt, und einer inaktiven Position bewegbar, insbesondere schwenkbar, ist, in dem es eine Bewegung des Stützmittelträgers von der ersten Endposition bis in die zweite Endposition ermöglicht, ist dadurch gekennzeichnet, dass
• - das Bewegungsbegrenzungsmittel einen Abstandshalter aufweist, der in der aktiven Position vertikal oberhalb eines Anschlagabschnitts des Gehäuseteils angeordnet und auf diesem gelagert ist,
• - in der aktiven Position mindestens ein Abschnitt des Stützmittelträgers vertikal oberhalb des Abstandshalters und auf diesem gelagert ist, und
• - in der inaktiven Position der mindestens eine Abschnitt des Stützmittelträgers vertikal oberhalb des Anschlagabschnitts des Gehäuseteils und auf diesem lagerbar ist.

According to a first teaching of the present invention, the previously derived and presented object is achieved in a household appliance, in particular an attachment of a vacuum cleaner, according to claim 1 . The household appliance

• - with a housing part, in particular chassis, which has a housing underside (housing side facing the surface to be cleaned),
• - with a support means, in particular a support roller,
• - with a support means carrier, which is connected to the housing part and on which the support means is arranged, wherein the support means carrier is movable, in particular pivotable, relative to the housing part between a first end position and a second end position, the support means being attached to (relative to) the Housing underside in the second end position maximally and in the first end position less than in the second end position or not at all, and
• - with a movement limiting means which is movable, in particular pivotable, between an active position, in which it limits a movement of the support means carrier in the direction from the first end position to the second end position in an intermediate position between the first end position and the second end position, and an inactive position , in which it allows movement of the support means carrier from the first end position to the second end position, is characterized in that
• - the movement limiting means has a spacer which, in the active position, is arranged vertically above and supported on a stop section of the housing part,
• - in the active position at least a portion of the proppant support is supported vertically above and on the spacer, and
• - In the inactive position, the at least one section of the support means carrier can be placed vertically above the stop section of the housing part and on this.

For the purposes of the invention, the term “vertical” or the vertical direction means a direction that extends from the underside of the housing in the direction of the interior of the housing, ie upwards. In the cleaning operation, the housing part and the entire household appliance are thus arranged vertically above the surface to be cleaned. “Adjacent” preferably means that there is no further component between the neighboring components and the components in particular are touching.

According to the invention, since a spacer is arranged vertically above a stop section of the housing part in the active position of the movement limiting means and is mounted thereon, forces introduced by the support means carrier into the stop section counter to the vertical direction can be diverted downwards (towards the underside of the housing) into the housing base. It has been shown that dissipating forces downwards or to the underside of the housing leads to no or essentially no deformation of the housing part or chassis, since said housing part anyway due to its supporting function - the housing part serves to accommodate all essential components for operating the household appliance - is not, or essentially not, deformable towards the underside of the housing. This is ensured by the stiffening elements running inside the housing in the form of housing walls and/or reinforcing webs or frames which are formed on the inside of the housing part facing away from the underside of the housing. In particular, a frame extends at least in sections around the opening (receiving opening) through which the support means or the support roller is moved outwards from the housing part, ie to the surface to be cleaned. Such a frame alone leads to increased rigidity, which prevents the housing part and in particular its housing base from bending outwards or towards the surface to be cleaned. The stop section is therefore preferably part of a housing web running inside the housing transversely to the underside of the housing, which is in particular a frame of the housing part which is formed inside the housing and which at least partially surrounds or delimits the receiving opening for the support means. In this case, the contact section that supports the spacer in the active position of the movement-limiting means is formed, in particular, at the vertically upper end of the housing web.

Since the forces that the support means carrier transfers to the spacer in its intermediate position are absorbed by the spacer and are diverted vertically downwards, in particular into a housing web, deformation of the housing part or chassis is prevented and the defined position is thereby prevented in the intermediate position of the support means carrier of the support means relative to the underside of the housing is reliably maintained even under load (when the support means carrier exerts a high pressing force on the spacer).

In the active position of the movement limiting means, at least a portion of the support means support is locatable vertically above and adjacent to and restable on the spacer. When the support means carrier is in its intermediate position, the at least one section of the support means carrier presses onto the spacer, in particular from above. The spacer is then clamped between the at least one section of the support means carrier and the stop section of the housing part or the material of the spacer fills the gap between the section of the support means carrier and the stop section. The at least one section leads to all of them if this leads to a slight deformation (an indentation) of the spacer, but not to a deformation of the following elements in the direction of force flow (stop section, underside of the housing).

In the inactive position (of the movement limiting means), the at least one section of the support means carrier can be arranged vertically above and adjacent to the abutment section of the housing part and can be supported on this. In other words, the at least one section of the support means carrier rests directly on the stop section when it is in the second end position. In this case, the second end position is then determined by the stop section independently of the (maximum) stroke or of the end position of the motor. Alternatively, it is also conceivable that the at least one section of the support means carrier is not in contact with any stop in the second end position, but the position of the support means carrier is determined solely by the stroke or the end position of the motor.

According to another embodiment of the household appliance according to the invention, the at least one section of the support means carrier is formed by a projection, the respective projection resting on the spacer in the intermediate position of the support means carrier. In particular, it is conceivable for the support means carrier to consist of two support means carrier parts arranged in parallel, which are spaced apart from one another and together carry the support means or the support roller.

In particular, the support means or the support roller is arranged between the two support means carrier parts. In this case, each support means carrier part preferably has a section or projection which comes to rest on the spacer in the intermediate position of the support means carrier. In this case, the force transmitted from the support means carrier to the spacer is introduced via a number of points into the spacer and from there further into the housing part, which leads to a better distribution of forces.

According to a further embodiment of the household appliance according to the invention, the support means carrier can be pivoted between the first end position and the second end position about a first pivot axis which is parallel to the underside of the appliance and in particular orthogonal to the vertical direction. The intermediate position is also reached by the pivoting movement. According to another embodiment, it is conceivable that the support means carrier additionally or alternatively performs a translatory movement between the first end position and the second end position. The same also applies to the movement limiting means, which is likewise in particular pivotable, namely about a second pivot axis, in particular about a second pivot axis which is at an angle to the first pivot axis and/or the underside of the device and is preferably orthogonal. This runs in particular parallel to the vertical direction. Such a pivoting movement allows the movement limiting means to be pivoted between the active position and the inactive position. In principle, it is also conceivable here that the movement limiting means additionally or alternatively carries out a translatory movement between the active position and the inactive position. It is preferred that the movement of the support means carrier between the first end position and the second end position runs in a first plane and the movement of the movement limiting means between the active position and the inactive position runs in a second plane which is at an angle to the first plane, in particular orthogonal, is arranged.

If the movement limiting means is pivotably mounted, a further embodiment provides that the movement limiting means has a first lever arm extending from the second pivot axis, with a first section of the first lever arm forming the spacer. A second section of the first lever arm preferably runs from the spacer to the second pivot axis, the second section running in particular at an angle, preferably orthogonally, to the first section of the lever arm. It is conceivable that the first section and/or second section, in particular on its side facing away from the underside of the housing, has at least one reinforcement element, in particular a reinforcement rib, which preferably extends over the entire second section and at least in sections over the first section extends.

To actuate the movement-limiting means, it is accessible at least in sections from the outside of the housing or is connected to a mechanical or electrical switch that is accessible from the outside of the housing. "Accessible" means that an operator can reach and actuate the relevant component (movement limiting means or switch) from the outside of the device directly or with a tool, so that the movement limiting means can be moved between the active and the inactive position. In the event that the movement limiting means is pivotable, provision is made in particular for the movement limiting means to have a second lever arm extending from the second pivot axis (in particular opposite to the first lever arm), which is in particular equipped with a mechanical or electrical switch, in particular a slide or toggle switch, which is preferably accessible from the bottom of the device.

According to yet another embodiment of the household appliance according to the invention, this also has an actuating device which drives the support means carrier or is connected to it and interacts in such a way that the support means carrier can be moved between the first end position and the second end position. Such an actuating device has, in particular, a motor which, when actuated, i.e. in operation or switched on, delivers the same power and/or regardless of whether the support means carrier is to be moved from the first end position to the second end position or the intermediate position causes the same (maximum) stroke of the actuating device. In other words, the motor always moves from its starting position, in which the support means carrier is located in its first end position, into the same end position. In the end position, the motor ensures that the support means carrier reaches its second end position. If the motor is returned to its starting position, the support means carrier thereby reaches its first end position again.

In order to move the support means carrier into its intermediate position, the motor is preferably moved into its end position during operation, with which the support means carrier could in principle also be moved into the second end position. However, in this case, as previously explained, the movement of the support means carrier from the first end position towards the second end position in the intermediate position is blocked by the spacer by having previously moved the movement limiting means to the active position. In this case, the additional stroke of the motor that is not required is preferably absorbed by a compressible, elastic component, in particular a spring, preferably a helical compression spring, which is mounted in a mount, for example a spring mount, which is connected, in particular rotatably connected, to the support means carrier. When the motor moves from the starting position to its end position, the lifting movement caused by the motor is first transmitted via the elastic component or the spring to the receptacle and from the receptacle to the support means carrier until the support means carrier has reached its intermediate position from the first end position . As soon as the support means carrier is blocked in its intermediate position by the spacer, the receptacle for the elastic component or the spring also automatically stops moving, as a result of which the elastic component or the spring is compressed in the receptacle until the motor reaches its end position Has.

The movement limiting means provided according to the invention is particularly advantageous in connection with an actuating device as defined above, in which a motor always delivers the same power and/or always causes the same stroke, since in this case no separate control of the actuating device for setting different stroke paths is necessary.

Basically, it is conceivable to provide a motor control that allows different strokes. It is also conceivable to provide a reed switch in components of the actuating device that move relative to one another. It is also conceivable to use a stepping motor as the motor in order to achieve different stroke lengths.

The object is also achieved according to a second teaching of the present invention by a household appliance, in particular a vacuum cleaner (household vacuum cleaner), containing a household appliance as defined above as an attachment.

• 1 eine schematische Perspektivansicht einer Haushaltsvorrichtung in Form eines Haushaltsstaubsaugers mit einem erfindungsgemäßen Haushaltsgerät als Vorsatzgerät,
• 2a) - c) schematische Teilansichten eines erfindungsgemäßen Haushaltsgeräts mit unterschiedlich eingestellten Bodenabständen,
• 3 eine schematische Teilansicht des Innern eines Haushaltsgeräts für die Haushaltsvorrichtung aus 1 mit inaktivem Bewegungsbegrenzungsmittel,
• 4 eine schematische Teilansicht des Innern des Haushaltsgeräts für die Haushaltsvorrichtung aus 1 mit aktivem Bewegungsbegrenzungsmittel und
• 5 eine andere Teilansicht des Innern des Haushaltsgeräts 1 aus 4 mit aktivem Bewegungsbegrenzungsmittel.

There are now a large number of possibilities for embodying and developing the household appliance according to the invention and the household appliance according to the invention. In this regard, reference is made on the one hand to the patent claims subordinate to claim 1 and on the other hand to the description of exemplary embodiments in conjunction with the drawing. Show in the drawing:

• 1 a schematic perspective view of a household appliance in the form of a household vacuum cleaner with a household appliance according to the invention as an attachment,
• 2a) - c) schematic partial views of a household appliance according to the invention with differently set floor clearances,
• 3 Figure 12 shows a partial schematic view of the interior of a household appliance for the household appliance 1 with inactive movement limitation device,
• 4 Figure 12 shows a partial schematic view of the interior of the household appliance for the household appliance 1 with active movement limitation means and
• 5 another partial view of the interior of the household appliance 1 4 with active movement limitation means.

In 1 a household appliance in the form of a vacuum cleaner 3, in particular an electric household vacuum cleaner, is shown as a preferred application of the household appliance 1 according to the invention. The vacuum cleaner 3 is designed as a hand-held stick device. In the present exemplary embodiment, this has the structure described below.

The vacuum cleaner 3 initially has a base unit 22 which preferably has an electric motor (not shown) for a suction/blower unit. A dust collection chamber 23 provided for receiving the vacuumed dust is docked to the base unit 22 . This preferably includes a dust filter bag (not shown).

The electric motor integrated in the base unit 22 is supplied with power via an electric cable 24, which also supplies the motor 21 of an actuating device 20, which will be described below, with power. In principle, it is conceivable to supply the motors with power via a rechargeable battery, as a result of which no electric cable 24 would then be required.

A socket for a device handle 25 is also provided on the base device 22 . This has a handle 26 at the end.

For tilling the soil, the base unit 22 is connected in terms of flow on its underside (opposite to the vertical direction V) to an attachment 2, which here forms the household appliance 1 according to the invention. The attachment 2 is in the form of a suction nozzle, here a floor nozzle. The embodiment shows a floor nozzle with a height-adjustable support means in the form of a support roller 5.

As in the 2a) until c) is shown schematically, the support roller 5 is movably arranged in a housing part 4, the housing bottom 4a forms the bottom of the device. For this purpose, the support roller 5 is fastened to a support means carrier 6 which is pivotably mounted on the housing part 4 about a pivot axis X1. The support means carrier 6 can be pivoted between a first end position I via an intermediate position III to a second end position II, with the support roller 5 in each of these positions I, II and III being down a different distance from the housing part 4 or counter to the vertical direction V protrudes. This changes the ground clearance a, ie the vertical distance between the housing underside 4a and the floor covering 27 in the area of the center point or the axis of rotation X3 of the support means 5. In the first end position I of the support means carrier 6, the ground clearance a is minimal, in the second end position II the ground clearance a is maximum and in the intermediate position III the ground clearance a is between the value for the first end position I and the value for the second end position 11. By changing the ground clearance, the fine dust pick-up, but also the coarse material pick-up, from the floor covering 27 and in particular from joints in the floor covering 27 can be optimized.

The following is based on one in the 3 until 5 illustrated embodiment described how the support means carrier 6 can be brought into its first end position I, its intermediate position III and its second end position II.

Thus, an actuating device 20 is provided which moves (pivots) the support means carrier 6 between the individual positions I, II and III. The actuating device 20 has a motor 21 which, when actuated, always moves from its initial position to its end position. In the end position, the support means carrier 6 reaches its second end position II or, if the support means carrier 6 is blocked by a movement limiting means 7 described below, its intermediate position III.

The motor 21 is designed here as a spindle motor and has a spindle 28 (threaded rod) and a spindle nut 29 designed as a hollow shaft with an internal thread, the spindle nut 29 being moved axially forwards or backwards depending on the direction of rotation of the spindle 28 . The spindle nut 29 is in turn resiliently mounted in a spring element 30 which has a sleeve-shaped spring receptacle 31 rotatably connected to the support means carrier 6 and a helical compression spring 32 mounted in the spring receptacle.

The spindle nut 29 has a radially circumferential collar on the outside and the spring receptacle 31 has a radially circumferential base on the inside, through which the spindle nut 29 protrudes. The helical compression spring 32 is compressible between the collar and the floor.

If the spindle 28 is now set in rotation, by which the spindle nut 29 is moved forward (in the direction of the spring mount 31), the movement of the spindle nut 29 is transmitted via the helical compression spring 32 to the spring mount 31, which in turn can be rotated with the support means carrier 6 is connected and transmits its movement to the support means carrier 6.

As already explained, the spindle nut 29 always performs the same stroke when the motor 21 is actuated from the starting position, i.e. the stroke is always the same, regardless of whether the support means carrier 6 is moved into the second end position II or the intermediate position III. So that the support means carrier 6 cannot be moved beyond the intermediate position III in the direction of the second end position II, a movement limiting means 7 with a spacer 8 is provided according to the invention, which before the motor 21 is actuated from the starting position, i.e. when the support means carrier 6 is still is in its first end position I, horizontally on a stop Section 9 of the housing part 4 can be moved. This is done by pivoting the movement limiting means 7 from an inactive position B to an active position A about a second pivot axis X2.

In the active position A, the spacer 8 is within the movement range of two sections 10 of the support means carrier 6. The two sections 10 are each designed as a projection 11 and come with the movement of the support means carrier 6 from the first end position I in the direction of the second end position II in contact with the spacer 8, thereby locking the support beam 6 in the intermediate position III. The spacer 8 is then clamped between the two projections 11 and the stop section 9, with the two projections 11 resting on the top side of the spacer 8 in the vertical direction V and introducing a force into it, which results from the fact that the motor 21 and thus the spindle nut 29 is moved further into the respective end position and a compressive force acts accordingly from the spindle nut 29 via the spring element 30 on the support means carrier 6 . The force introduced by the projections 11 into the spacer 8 is absorbed and distributed in the spacer 8 and then distributed over a large area in the stop section 9 of the housing part 4, which is arranged vertically below the spacer 8 and accommodates the spacer 8 vertically. This state is in 4 and 5 shown and allows the support roller 5 in the in 2 B) to move the position shown, in which the vertical distance a between the housing underside 4a and the floor covering 27 is somewhat smaller, for example by 2 mm smaller, than the maximum floor clearance in 2c) is. For example, the ground clearance a in the intermediate position III is in a range from 2 to 4 mm, preferably in a range from 2.5 to 3.5 mm and is particularly preferably 3 mm.

In order to ensure that the support means carrier 6 is not blocked by the spacer 8 but can be moved freely into its second end position II, the movement limiting means 7 can be moved from the active position A to the inactive position B. The spacer 8 is then located outside the range of movement of the two sections 10 or projections 11 of the support means carrier 6. The support means carrier 6 can then be pivoted beyond the intermediate position III until the two projections 11 come into contact with the stop section 9 of the housing part 4 at the top . This state is in 3 shown and allows the support roller 5 to be extended to the maximum, as in 2c) is shown.

The stop section 9 is the vertically upper part of a housing web 12 running inside the housing transversely to the housing underside 4a, which is part of a frame 33 which supports the support means 5 or a receiving opening through which the support means can be moved back and forth. surrounds.

The movement limiting means has a first lever arm 13 extending from the pivot axis X2 and a second lever arm 18 extending in the opposite direction from the pivot axis X2. The first lever arm 13 has a first section 14 and a second section 15 arranged between the first section 14 and the pivot axis X2, the first section 14 and the second section 15 being substantially orthogonal to one another and orthogonal to the vertical direction V. The first section 14 in turn forms the spacer 8. The second section 15 in turn has a reinforcing element 16 vertically on the upper side. This is a reinforcing rib 17 which extends continuously over the second section 15 and part of the first section 14 .

The second lever arm 18 interacts with a mechanical switch 19 in the form of a slide or toggle switch, which is accessible to the user from the bottom 4a of the device. By actuating the switch 19, the second lever arm 18 is pivoted about the pivot axis X2, with this movement being transmitted to the first lever arm 13, which is embodied in one piece with the second lever arm 18 here, for example. In this way, the spacer 8 is either moved into the range of movement of the support means carrier 6 or of the sections 10 (active position A of the movement limiting means 7, 4 and 5 ) or moved out of the range of motion (inactive position B of the motion limiting means 7, 3 ).

Reference List

1

household appliance

2

attachment

3

vacuum cleaner

4

Housing part, in particular chassis

4a

case bottom

5

Support means, in particular support roller

6

proppant carrier

7

movement restraining means

8th

spacers

9

stop section

10

Section of proppant beam

11

Protrusion of proppant beam

12

housing bar

13

first lever arm

14

first section of the first lever arm

14a

Top of the first section

15

second section of the first lever arm

15a

top of the second section

16

reinforcement element

17

reinforcing rib

18

second lever arm

19

Switch

20

actuating device

21

engine

22

base unit

23

dust collection room

24

electric cable

25

device handle

26

handle

27

flooring

28

spindle

29

spindle nut

30

spring element

31

spring mount

32

helical compression spring

33

frame

I

first end position of the support means carrier

II

second end position of the support means carrier

III

Intermediate position of the support means carrier

A

active position of the movement limiting means

B

inactive position of the movement limiting means

X1

first pivot axis

X2

second pivot axis

X3

Center or axis of rotation of the support means

V

vertical direction

a

ground clearance

Claims (11)

Household appliance (1), in particular attachment (2) of a vacuum cleaner (3), - with a housing part (4) which has a housing underside (4a), - with a support means (5), - with a support means carrier (6) which is connected to the housing part (4) and on which the support means (5) is arranged, the support means carrier (6) being movable relative to the housing part (4) between a first end position (1) and a second end position (11), the Supporting means (5) on the underside (4a) of the housing in the second end position (11) protrudes maximally and in the first end position (1) less than in the second end position (II) or not at all, and - with a movement limiting means (7) which is between an active position (A) in which there is a movement of the support means carrier (6) in the direction from the first end position (1) to the second end position (II) in an intermediate position (III) between the first end position (I) and the second end position ( 11) limited, and an inactive position (B ) is movable in that it allows a movement of the support means carrier (6) from the first end position (1) to the second end position (11), characterized in that - the movement limiting means (7) has a spacer (8) which in the active position (A) is arranged vertically above a stop section (9) of the housing part (4) and is mounted on this, - in the active position (A) at least one section (10) of the support means carrier (6) is vertically above the spacer (8 ) and is mounted on this, and - in the inactive position (B) the at least one section (10) of the support means carrier (6) can be mounted vertically above the stop section (9) of the housing part (4) and on this. Household appliance (1) after claim 1 , characterized in that the stop section (9) is part of a housing web (12) of the housing part (4) running inside the housing transversely to the underside (4a) of the housing, the stop section (9) being formed in particular at the vertically upper end of the housing web (12). . Household appliance (1) according to one of the preceding claims, characterized in that the at least one section (10) of the support means carrier (6) is formed in each case by a projection (11), the respective projection (11) in the intermediate position (III) of the Support means carrier (6) rests on the spacer (8). Household appliance (1) according to one of the preceding claims, characterized in that the support means carrier (6) can be pivoted about a first pivot axis (X1) parallel to the underside (4a) of the device between the first end position (I) and the second end position (II) and/or the movement limiting means (7) can be pivoted about a second pivot axis (X2), can be pivoted between the active position (A) and the inactive position (B) in particular about a second pivot axis (X2) which is at an angle to the first pivot axis (X1) and/or the underside (4a) of the device and is preferably orthogonal. Household appliance (1) after claim 4 , characterized in that the movement limiting means (7) comprises a first lever arm (13) extending from the second pivot axis (X2), a first portion (14) of the first lever arm (13) forming the spacer (8). Household appliance (1) after claim 5 , characterized in that a second section (15) of the first lever arm (13) runs from the spacer (8) to the second pivot axis (X2), the second section (15) being in particular at an angle, preferably orthogonal, to the first section (14 ) of the first lever arm (13). Household appliance (1) after claim 6 , characterized in that the first section (14) and/or second section (15), in particular on its side (14a, 15a) facing away from the underside (4a) of the housing, has at least one reinforcing element (16), in particular a reinforcing rib (17) Having, which / which preferably extends over the entire second section (15) and at least partially over the first section (14). Household appliance (1) according to one of Claims 4 until 6 , characterized in that the movement limiting means (7) has a second lever arm (18) extending from the second pivot axis (X2), which interacts in particular with a mechanical or electrical switch (19) which is preferably accessible from the underside (4a) of the device . Household appliance (1) according to one of the preceding claims, characterized in that the household appliance (1) also has an actuating device (20) which drives the support means carrier (6) in such a way that the support means carrier (6) moves between the first end position (I) and the second end position (11) is movable. Household appliance (1) after claim 9 , characterized in that the actuating device (20) has a motor (21) which, when actuated, independently of whether the support means carrier (6) moves from the first end position (1) to the second end position (II) or the intermediate position (III) is to be moved, delivers the same power and/or causes the same stroke of the actuating device (20). Household appliance, in particular vacuum cleaner (3), containing a household appliance (1) according to one of the preceding claims as attachment (2).

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