TW201825034A - Chassis for suction nozzle with air guiding element capable of realizing a comfortable running process on a carpet floor with a sufficient cleaning effect - Google Patents

Abstract

The present invention relates to a chassis for a suction nozzle, which includes at least one suction opening, an upper surface and a bottom surface, wherein the front edge, the rear edge and the side edge of the chassis define the suction opening. The invention addresses the technical problems known in the prior art and realizes a comfortable running process for a suction nozzle on a carpet floor with a sufficient cleaning effect by forming at least one support block on the bottom surface at the side edge and forming air guiding elements on the bottom surface at the front edge, in which the air guiding elements are formed in a protruded manner and spaced apart from each other. Furthermore, the technical problems can be solved by a suction nozzle having the chassis according to the present invention and by a vacuum cleaner having the suction nozzle according to the present invention.

Description

Underframe for suction nozzle with air guiding element

The invention relates to a chassis for a suction nozzle, which has at least one suction port, an upper surface and a bottom surface, wherein a front edge, a rear edge and a side edge of the chassis define the suction port. In addition, the present invention also relates to a suction nozzle for a vacuum cleaner, which has a housing, a suction chamber formed in the housing, and a suction channel formed in the housing, wherein the suction chamber is fluidically connected with the suction nozzle. The surrounding environment is connected and the suction channel flows into the suction chamber. The invention also relates to a vacuum cleaner having the aforementioned suction nozzle.

A suction nozzle with a chassis as a head device, which is also called a hard floor suction nozzle or an electric brush according to the purpose of use, is typically fluid-tightly connected to the floor vacuum cleaner through a flexible suction pipe and / or a manipulation pipe. In the hand-held vacuum cleaner mentioned, the suction nozzle can also be directly fluid-tightly connected to the base body of the vacuum cleaner.

The suction nozzle usually has a housing in which, for example, a brush chamber for accommodating a brush roller and a motor chamber for accommodating a motor for driving the brush roller and / or a transmission assembly are arranged. Here, the bristle roller usually has a roller body and a large number of brush wires, especially bristles, arranged on it. The brush wires can be arranged on the roller body in the form of individual bundles or in the form of brush bars, that is to say brush wires arranged next to each other. By rotating the brush roller and simultaneously generating an inhalation airflow from the inhalation port through the inhalation chamber to the inhalation channel, particles such as dust particles or dirt particles separated from the floor can be sucked up and wrapped by the airflow.

An underframe is fixed to the bottom surface of the casing, that is, the portion of the casing that faces the surface to be cleaned in normal operation. Here, it is known from the prior art to have a chassis that is fixedly mounted on the bottom surface of the housing or a chassis that is removably or detachably mounted on the bottom surface of the housing. Under normal operation, the chassis is connected to the bottom surface of the casing.

Here, the base frame usually has a bottom opening in the form of at least one suction opening, which connects the suction chamber and preferably the brush chamber to the surroundings of the floor area to be cleaned. When the brush wire of the brush roller needs to be in contact with the surface to be cleaned during the cleaning process, the brush wire of the brush roller protrudes outward through the chassis through the suction port in the normal operation. However, it can also be set in other applications that the brush wires of the brush roller do not need to be in contact with the surface to be cleaned and these brush wires do not protrude from the suction port.

Among the known suction nozzles, especially those with electric brush rollers, it is desirable that when the nozzles are moved on the carpet floor, the wire of the suction port and the brush rollers has a certain distance from the carpet to be cleaned Distance, because otherwise the fibers of the carpet to be cleaned will become entangled on the roller brush and block the suction port. In addition, the suction opening is usually sealed via the edge of the chassis to generate a high negative pressure and thereby achieve the highest possible suction of dust by the suction nozzle.

In practice, this leads to excessively high negative pressures when cleaning the carpet. Therefore, the front edge of the chassis often sinks forward into the carpet to be cleaned when the suction nozzle is moved.

As a result, the front edge can become trapped in the fibers of the carpet to be cleaned, and thus the suction nozzle cannot be pushed on the carpet floor in a comfortable manner. However, due to the stagnation of the front edge and the carpet to be cleaned, the suction nozzle can only move in a jumping manner at least in part.

It is therefore an object of the present invention to provide a chassis for a suction nozzle, which solves the problems known in the prior art and realizes a comfortable operation of the suction nozzle on a carpet floor while providing sufficient cleaning effect.

The previously mentioned technical problem is solved according to the first aspect of the invention by forming at least one support block on the bottom surface of the side edge, forming an air guide element on the bottom surface of the front edge and forming the air guide elements spaced apart from each other Set of bumps.

Here, these edges not only form the boundary of the suction opening, but also form a planar section of the chassis. Additionally, according to the invention, a protruding support block is provided on the side edge and an air guide element is provided on the front edge.

By means of the support block and the air guide element, the negative pressure in the suction chamber of the head unit is adjusted, because it is possible not only to suck in air from below, but also from the front by passing the front edge through the support block / air The guide element is spaced from the floor. The role of the air guiding element is to provide a cyclone of the sucked-in air which is advantageous in terms of hydrodynamics, whereby the chassis enables a comfortable operation of the suction nozzle on the carpet floor. As a result, the front edge of the chassis is prevented from sinking into the carpet to be cleaned and thereby the stagnation of the suction nozzle in the carpet to be cleaned is avoided.

In addition, the suction effect is promoted by not only sucking in air from below, but also sucking in air from the front. As a result, stains located in front of the chassis can also be sucked in, for example.

If a brush roller with a brush wire is placed in the suction chamber equipped with a suction nozzle with a base frame and the brush wire extends out of the suction port to clean the floor, the suction effect is further promoted, because the air is generated by sucking air from the lower and front sides. The diagonal air flow is optimally matched to the rotary motion of the brush roller and the brush wire mounted on the brush roller.

According to a preferred embodiment, the support block projects relative to the bottom surface of the front edge, preferably relative to the raised portion. This ensures a sufficient distance between the front edge and the floor to be cleaned. By constructing the support block deeper than the raised portion, it is mainly that the support block of the bottom frame comes into contact with the floor to be cleaned, whereby the main load of the entire suction nozzle falls on the support block. In such a design, it is possible for the user to make the suction nozzle with the base frame according to the invention on the floor to be cleaned, in particular a carpet, in a comfortable manner by means of a support block preferably formed as a slider Run on the floor.

It is also preferable that the convex portion protrudes from the bottom surface of the front edge preferably from 0.5 mm to 2 mm. These values prove to be particularly advantageous for handling comfort and dust extraction in tests.

It is also preferred that the projections are formed substantially uniformly over the entire extension of the front edge, wherein the projections have a distance of at least 1 mm from each other. By forming the protrusions on the entire front edge, on the one hand, the front edge is no longer sunk into the carpet to be cleaned in a reliable manner over the entire length, and on the other hand, sufficient suction is ensured by the entire width of the chassis effect. In tests, a distance of at least 1 mm from the protrusions to each other has proven to be particularly advantageous for improving the suction effect. However, it is also possible to form the raised portion only on a part of the front edge. The distance between the protrusions may be different.

According to another preferred design solution, the protrusions have a width or a maximum diameter of 2 mm to 4 mm. This design form is obtained by means of experiments and also promotes an improvement in the dust extraction effect in relation to other widths or diameters.

It is further preferred that these protrusions are formed into a cube shape, a pyramid shape, a cone shape, a hexagon shape, a rhombus shape, a droplet shape, a prism shape or a cap shape. These design forms through the protrusions influence the air flow drawn in through the front edge. Here, the hat-shaped design is particularly advantageous in terms of the suction effect. Here, the shape of a hat means that the convex portion is designed as a dome-shaped spherical segment. This is also within the framework of the invention when not all the protrusions have exactly the same shape.

The chassis is preferably manufactured as a die-cast part made of plastic, preferably polyamide. Through the die-casting process, the chassis can be produced in large quantities and economically. Plastic is particularly suitable as a raw material for die-casting and when polyamide is used as a raw material, the chassis has high strength and toughness, which reduces the wear of the chassis.

It is further preferred that the roller is rotatably supported in the front edge and / or the rear edge, wherein the roller is preferably spaced from the side edge preferably by a maximum of 10 cm, in particular a maximum of 5 cm. Possible roller damage is avoided by the rollers in the front edge. In addition, the running behavior of the suction nozzle is also improved, because the base frame additionally has rollers in addition to the support block or is placed on the floor to be cleaned with the rollers. The chassis preferably has rollers in the front or rear edges.

The chassis may be formed as one piece with the housing of the nozzle. Alternatively, the chassis may have at least one connection element, whereby the chassis may be detachably connected to the housing. The connecting element is preferably designed as a snap-in element. Here, the nozzle housing to be described next has a corresponding engagement element for locking the chassis and the housing. The base frame and, accordingly, the housing can also have a plurality of connecting or engaging elements, such as engaging means and / or hooks. This enables quick and reliable installation of the chassis on the base or removal of the chassis for maintenance or user replacement of the at least one brush body. Alternatively, it is also possible to design the connecting element as a device for a bayonet connection or as a device for a screw connection.

The previously mentioned technical problem is solved according to the second aspect of the invention, that is, the suction nozzle has the aforementioned chassis. The advantages of this design form are given in the description of the chassis according to the invention.

According to a preferred design, the rotatable brush roller is supported in the suction chamber, wherein the brush roller has a roller body and a brush wire. The placement of the brush rollers contributes to a significantly improved cleaning effect, especially in the cleaning of carpet floors.

It is also preferred that the suction nozzle has at least one releasable and protruding sealing lip for sealing the suction opening on a hard floor, preferably for sealing the front and rear edges of the suction nozzle. It is advantageous for the cleaning of hard floors to provide a suction chamber that is as sealed as possible to ensure a sufficient suction effect. Here, the side of the suction nozzle is preferably not sealed so as to ensure a high suction effect also at the joints that extend obliquely or horizontally to the running direction of the suction nozzle. This is especially important for the optimization of the cleaning level of the suction nozzles on hard floors. The at least one sealing lip can advantageously be turned out / extended on a hard floor and retracted / received on a soft carpet floor. This can improve the cleaning effect. It is also within the meaning of the invention when forming a sealing lip that seals the side edges of the suction opening.

According to another preferred design, the suction nozzle has at least one retractable and extended support wheel, which is used to separate the suction nozzle from the hard floor to be cleaned. For example, the at least one support wheel can be placed in a given operating position on a hard floor, such as a hard floor, to increase the distance between the chassis and thus the suction port and the surface to be cleaned. When the surface is changed to a soft floor, such as a carpet, the support wheel can be placed in another specified operating position, in particular to reduce the distance between the chassis or the suction opening and the surface to be cleaned. As a result, an improved suction effect can be achieved. This is particularly advantageous when combined with the aforementioned sealing lips that can be retracted and extended.

It is also preferred that the chassis is removably connected to the housing by a threaded connection, a bayonet connection, or preferably a snap-in connection. This enables quick and reliable installation of the chassis to the base or removal of the chassis for maintenance or user replacement of the at least one brush body.

This previously mentioned technical problem is solved according to the third aspect of the invention, namely that the vacuum cleaner has the aforementioned nozzle. Here, the vacuum cleaner is preferably fluid-tightly connected to the suction nozzle via a flexible suction hose and / or suction duct.

In the following description of different embodiments according to the present invention, components and elements having the same function and working mode are marked with the same reference numerals, even if these components and elements have different sizes in different embodiments. Or shape.

Fig. 1 shows an obliquely downward perspective view of a first embodiment of a chassis 2 for a suction nozzle 12 according to the present invention. The bottom surface 10 of the chassis 2 is therefore shown in this view. Here, the chassis 2 has a suction opening 4 which is defined by and defined by a front edge 14, a rear edge 16 and two side edges 18. The edges 14, 16 and 18 not only form the boundary of the suction opening 4, but also form a planar section of the chassis 2. Additionally, the side edge 18 is formed as a support block 18a.

On the upper sides of the front edge 14 and the rear edge 16 are arranged connecting elements 6 for detachably mounting the chassis 2 in the suction nozzle 12. In the view shown in FIG. 1, the connecting element 16 arranged on the rear edge 16 is only partially visible.

Cap-shaped protrusions 22 a are formed along the bottom surface of the front edge 14, which are uniformly distributed on the bottom surface of the front edge 14 and correspondingly have a substantially completely uniform pitch therebetween. The cap-shaped raised portion 22 a is formed in a circular arch shape and formed into a spherical frustum shape.

It can also be seen that the support block 18a projects beyond the raised portion 22a and thus the raised portion 22a does not come into contact with the floor to be cleaned or rarely during cleaning. The front edge 14 and the raised portions 22 a formed on the front edge 14 may not be caught in the fibers of the carpet to be cleaned when cleaning the carpet, thereby improving the pushing characteristics of the suction nozzle 12.

FIG. 2 shows a perspective view of the chassis 2 according to FIG. 1 from an obliquely upward direction. The top 8 of the chassis 2 can therefore be seen in this view. It can be seen that the suction port 4 is divided into a plurality of smaller suction ports 4a by the connecting piece 5. Furthermore, the support block 18 a formed on the bottom surface of the side edge 18 can be seen in this view.

The chassis 2 and the housing 26 of the suction nozzle 12 are detachably connected on the bottom surface of the housing by the fixing element 6a. In particular, an engaging element 6 a is provided to engage the chassis 2 with a corresponding engaging element (not shown) on the housing 26.

A perspective view of the suction nozzle 12 with the first embodiment of the chassis 2 is shown in FIG. 3. The chassis 2 is connected to the housing 26 of the suction nozzle 12 via a connection element 6. In the bottom surface of the housing 26, there is provided another opening 15 for forming an ultrasonic sensor 17 for detecting a sensor of the type of the floor to be cleaned.

The suction nozzle 12 also has a front sealing lip 38 and a rear sealing lip 40. It can be turned out (hard floor) or retracted (carpet floor) depending on the type of floor detected. This process is preferably performed automatically and based on the analysis of the ultrasonic sensor.

In addition, a push switch 9 is additionally provided on the bottom surface of the housing 26, which realizes adjustment of the sealing lips 38 and 40 or additional support wheels. Furthermore, a rotatable brush roller 32 is supported in the suction chamber, wherein the brush roller 32 has a roller body and a brush wire 36.

FIG. 4 shows a perspective view of a suction nozzle 12 of a second embodiment with a chassis 2. Different from the previous design, the base frame 2 has two rollers 24 in the front edge 14, which are respectively disposed on the sides of the front edge 14. Possible roller damage due to the raised portions 22a is avoided by the rollers 24 in the front edge 14, because the rollers 24 are in contact with the floor to be cleaned and not the raised portions 22a. The roller 24 preferably protrudes from the bottom surface of the front edge 14 to the same extent as the support block 18a.

FIG. 5 shows a vacuum cleaner 44 according to the invention with a suction nozzle 12 according to the invention. The vacuum cleaner 44 shown is a hand-held vacuum cleaner 44 with a suction nozzle 12 according to the invention. The general form of the exemplary handle-guided vacuum cleaner 44 here typically has a base housing 46 or a base body in which a suction unit / blower unit (not shown) is arranged. A suction air flow can be generated by this unit.

In the base housing 46 is a filter device 48 having a filter bag (not shown here). The filter bag filters the suctioned air carrying dirt.

To guide the vacuum cleaner 1, a retractable equipment handle is arranged on the vacuum cleaner 1 and is arranged on the base housing 46. The handle has a handle 13 on the end side. In this case, the current supply takes place via a wire 19 entering the handle 13.

The head part 12 configured here as a suction nozzle 12 is connected to the vacuum cleaner 44 in particular rotatably and reversibly via a connection sleeve 21. The head piece 12 is guided through a surface to be cleaned (not shown here) in normal operation. The head member 12 has a casing 26 and a chassis 2 placed on a bottom surface of the casing 26.

2‧‧‧ underframe

4, 4a‧‧‧ Suction port

5‧‧‧pieces

6‧‧‧Connecting components

6a‧‧‧Fixed element; snap element

8‧‧‧ above

9‧‧‧ Push the switch

10‧‧‧ underside

12‧‧‧ Nozzle

13‧‧‧handle

14‧‧‧ front edge

15‧‧‧ opening

16‧‧‧ rear edge; connecting element

17‧‧‧Sensor

18‧‧‧ side edge

18a‧‧‧Support block

19‧‧‧Wire

22‧‧‧air guide element

22a‧‧‧ raised

24‧‧‧ Wheel

26‧‧‧shell

32‧‧‧Brush roller

36‧‧‧ Brush

38, 40‧‧‧Seal lips

44‧‧‧Vacuum cleaner

46‧‧‧base shell

48‧‧‧filtration device

The invention is explained further below with the aid of a schematic illustration showing one or more embodiments. In the picture:

Fig. 1 shows a perspective view of a first embodiment of a chassis for a suction nozzle from obliquely below, according to the present invention,

Fig. 2 shows a perspective view of a first embodiment of a chassis for a suction nozzle from above, according to the present invention,

Fig. 3 shows a perspective view of a first embodiment of a suction nozzle according to the invention having a first embodiment of a chassis according to the invention,

Fig. 4 shows a perspective view of a first embodiment of a suction nozzle according to the invention having a second embodiment of a chassis according to the invention,

Figure 5 shows a vacuum cleaner with a suction nozzle according to the invention.

Claims (11)

A chassis for a suction nozzle, comprising: at least one suction port, an upper surface and a bottom surface, wherein a front edge, a rear edge, and a side edge define the suction port, and are characterized in that a bottom surface of the side edge is formed At least one support block, an air guide element is formed on the bottom surface of the front edge, and the air guide element is formed in the form of raised portions spaced from each other. The underframe according to claim 1, wherein the bottom surface of the support block with respect to the front edge preferably protrudes from the raised portion. The underframe according to claim 1 or 2, characterized in that the protruding portion preferably protrudes from the bottom surface of the front edge by 0.5 mm to 2 mm. The underframe according to any one of claims 1 to 3, wherein the protrusions are formed substantially uniformly distributed over the entire extended length of the front edge, wherein the protrusions preferably have at least 1 mm from each other Pitch. The underframe according to any one of claims 1 to 4, wherein the raised portion has a width or a maximum diameter of 2 to 4 mm. The underframe according to any one of claims 1 to 5, wherein the convex portion is formed into a cube shape, a pyramid shape, a cone shape, a hexagon shape, a rhombus shape, a droplet shape, a prism shape, or a cap shape. . The underframe according to any one of claims 1 to 6, characterized in that a roller is rotatably supported in the front edge and / or the rear edge, wherein the roller is preferably spaced from the side edge preferably by a maximum of 10 cm, particularly the maximum 5cm. A suction nozzle for a vacuum cleaner, which has a housing, a suction chamber formed in the housing, and a suction channel formed in the housing, wherein the suction chamber is fluidly connected to the surrounding environment of the suction nozzle, and The suction channel is introduced into the suction chamber, wherein the suction nozzle has a chassis according to any one of claims 1 to 8. The suction nozzle according to claim 8, wherein a rotatable brush roller is supported in the suction chamber, wherein the brush roller has a roller body and a brush wire. The suction nozzle according to claim 8 or 9, characterized in that at least one receivable and protruding sealing lip is provided for sealing the suction port on the hard floor. A vacuum cleaner for floor cleaning, characterized in that the vacuum cleaner has the suction nozzle according to any one of claims 8 to 10.