CN1921791B - Floor suction port of vacuum cleaner - Google Patents

Abstract

The invention relates to a floor nozzle (1) for a vacuum cleaner with a vacuum chamber (3) defined to the front and rear in the direction of advance (r) by first defining means (8), for example by sliding blocks (9), whereby an optional rotating brush (6) is arranged within the vacuum chamber (3). According to the invention, the manipulation of a conventional floor nozzle on vacuuming a carpeted floor may be improved, whereby the first defining means, arranged in the normal direction of advance is fixed over a part of the width of the vacuum chamber and may be displaced over a part of the width in a sliding manner.

Description

Floor suction port of vacuum cleaner

The invention relates to a floor suction opening according to the features of the preamble of claim 1 .

Floor suction openings of the type described are known. The delimiting devices arranged at the front and rear of the suction chamber, for example in the form of slide plates, are especially effective when working on carpeted floors, where the floor suction opening is supported by slide plates on the carpet pile, and they provide suction A nearly hermetic closure of a cavity. It has been found to be disadvantageous here that, especially on dense and/or high-pile carpet floors, a high negative pressure develops in the suction chamber, which leads to increased sliding forces due to increased friction. Said increased sliding force makes the cleaner difficult to use.

A floor suction opening is known from DE-A 4412988, which has a substantially Y-shaped flap with a spring preloaded into the closed position. Coarse dirt can flow through better with this flap. The flap reacts positively to this coarse dirt, i.e. it is shifted into the swivel position by the force exerted thereby, but as soon as the coarse dirt is inside the suction opening, the flap returns to the position due to spring force. original location.

Proceeding from the prior art described, the problem underlying the invention is to improve the operability of a floor suction opening of the aforementioned type, in particular when vacuuming carpeted floors.

The above technical problem is solved by what is stated in claim 1 . Through the sliding valve design of the movable part of the first front delimiting device, the floor dust suction port can adjust the negative pressure existing in the suction chamber. Preferably, this preceding first delimiting means is a slide plate.

In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that. The above-mentioned technical problem is solved by the content of claim 1 . Due to the sliding valve-type design of the movable section of the first delimiting device at the front, the floor suction opening can adjust the negative pressure formed in the suction chamber. Preferably, the first delimiting means at the front is a slide plate. The sliding valve-like movable part of this sliding plate can open a rough material opening in the end area of the floor suction opening, on the one hand, bypass air can flow through it to adjust the negative pressure and thus the sliding force; on the other hand Coarse objects can pass through the opening which is open in the area of the slide-valve movement part of the preceding delimiting device into the area of the suction chamber which is under negative pressure. Furthermore, the incoming bypass air carries away dirt on the carpet floor in the region of the open bypass air opening, which offers a further advantage. According to the invention, through the design of the sliding valve-type moving part of the front delimiting device, not only can a bypass air port be opened for adjusting the negative pressure in the suction chamber, but also cause the delimiting device, preferably the front The internal slides offer the possibility of better suction of coarse objects, since with non-moving slides they block the entrance of coarse objects to the suction chamber. It is also advantageous if the movable part of the delimiting device is arranged centrally between the two fixed parts of the delimiting device. The width of the delimiting device for slide valve movement is equal to 0.25 to 0.5 of the width of the floor suction opening, preferably equal to one-third thereof. It has also proven to be advantageous to arrange the movable part of the delimiting device centrally, facing the end side of the floor suction opening, since the user usually tends to suck up coarser dirt in the center. This limited width, preferably on the order of about one third of the width of the entire floor suction opening, prevents the suction and arching of loose and/or dense carpet or carpet sections into the opening by delimiting the movable portion of the device . In another advantageous refinement of the subject matter of the invention, provision is made in any case for the movable part of the delimiting device to be assigned a second delimiting device in front of it in the advancing direction. Furthermore, the front second delimiting device is preferably designed in the form of a lip and is made, for example, of an elastically returnable material, thus for example in the form of a sealing lip. This second delimiting device also extends transversely to the normal advancing direction of the floor suction opening. Furthermore, the second delimiting means, for example the sealing lip, can only be provided in the region to which the movable part of the first delimiting means belongs. However, it is preferably provided that the second delimiting device extends along the entire width of the floor suction opening and is thus located not only in front of the movable part of the first delimiting device but also in front of its fixed part. In connection with this, it is also proposed that the second delimiting device is supported on the first delimiting device when the movable part of the first delimiting device is in the lowered state. Furthermore, the support described is preferably also implemented in the region in which the fastening part of the first delimiting device is associated. The second delimiting device, such as the sealing lip, is designed in terms of its cross-sectional shape and elasticity, at least in the region of the movable part of the first delimiting device, when supported by the first delimiting device on a so-called standard carpet , which only allows a small air flow. The result is an almost complete sealing of the suction chamber. If the displacement force increases to a value that is difficult for the user to manipulate due to the high negative pressure in the suction chamber, the corresponding arrangement is canceled by the sliding valve-like shifting of the movable part of the first delimiting device The second delimiting device or the section to which the second delimiting device belongs is supported at the rear, so more air is sucked into the suction chamber through the open effective air port or bypass air port, and at the same time, The second delimiting means or sealing lip is bent inwards in the direction of the gas flow. This also brings about the further advantage that rough objects can now enter below the sealing lip and are no longer blocked by the first delimiting device or the sliding plate in this region. Furthermore, the second delimiting device is nevertheless more or less continuously inserted into the carpet pile. This results in a constant fabric appearance on the patterned carpet along the entire width of the suction opening. In the case of high negative pressure, air flows through the carpet under the sealing lip or the second delimiting device, this air flow is also used to dislodge and transport dirt. Advantageously, the movable part of the first delimiting means is designed with supporting ridges for supporting the second delimiting means. The supporting ridge has a smaller extension in the direction of the floor, ie in the direction of the ground to be maintained, than the first delimiting means, for example a slide plate. The supporting ridge is therefore chosen such that it does not come into contact with the ground to be maintained. Furthermore, it is also preferred that a gap is formed between the first delimiting device and the second delimiting device. In order to further improve the elastic deflection of the second delimiting device when the rear support by the first delimiting device is eliminated, in a development of the subject matter of the invention, the second delimiting device is in any case Slits are slit in the area of the moving part to form lip-shaped partitions. In contrast, the section of the second delimiting device corresponding to the movable part of the first delimiting device can also be designed in the form of bristle strips. According to another embodiment, it can also be provided that two movable parts of the first delimiting device are formed along the width of the floor suction opening, which are respectively arranged between two fixed parts of the first delimiting device. Obtain the two motion segments of the first delimiting device spaced apart from each other by a certain distance along the width direction of the floor dust suction opening. These two segments can have a common support or the like, so that they can be combined with each other at the same time. Glide evenly. Thus, a central fastening section of the first delimiting device can be provided, which is preferably shaped wedge-shaped with a wedge top facing in the advancing direction. Based on this central fastening section, the central fastening region of the first delimiting device is shaped like a ski. If (after the movable part of the first delimiting device has been moved to a position that releases the coarse object opening) the ground dust suction port moves forward, the rough object reaching the first delimiting device is also called If the fixed section of the support top is used, the coarse object is introduced into the suction chamber through the left or right side under the support of propulsion and air flow. Furthermore, by means of this central fixed section of the first delimiting device, the clear span of the carpet floor is roughly evenly divided over the entire area of the bypass air opening or coarse material opening released by the movable part of the first delimiting device. This carpet floor or carpet floor section is compressed by the central fixing section, so it is impossible to suck it into the suction chamber. Thus, the opening released by the movable part of the first delimiting means remains open even when encountering a dense carpet. The user can move the movable part of the first delimiting device by means of a control slide valve, preferably mounted on the upper outer surface of the floor suction opening. Thus, the user can react to an increase in the sliding force, for example by a foot-operated push, whereby the movable part of the first delimiting device is raised or lowered more or less. As a result, the user can reduce the negative pressure in the suction chamber to a minimum and, if necessary, continue to work at the maximum power level of the vacuum cleaner without negatively affecting the cleaning performance, for example the absorption of fibers. Finally, it is proposed that the movable part of the first delimiting device is guided on a circular arc segment, and it is also preferred that the center of the circular arc lies on the axis of rotation of the motor-driven brush mounted in the suction chamber .

The invention will be explained in more detail below with reference to the drawings, which only show two embodiments. In the attached picture:

Fig. 1 represents the three-dimensional detailed view of the floor dust suction port according to the present invention;

Figure 2 represents a schematic sectional view taken along the line II-II in Figure 1, relating to the sinking position of the slider-like movable part of the first delimiting device;

Figure 3 represents a view corresponding to Figure 2, but with regard to the position of the movable delimiting device after sliding;

Fig. 4 shows a partial bottom view of the floor dust suction port, which relates to the second implementation form;

Figure 5 shows an end view of the floor suction opening according to a second embodiment;

Figure 6 shows a perspective detail view of the second embodiment, concerning the sunken position of the movable part;

FIG. 7 shows a schematic perspective view corresponding to FIG. 6 , but in a raised position of the movable delimiting device.

Firstly, a floor suction opening according to the invention for a vacuum cleaner not shown in the figures is shown and described with reference to FIGS. 1 to 3 . The floor dust suction port 1 is designed as an accessory, which can be connected to the vacuum cleaner through a connecting pipe 2 in terms of circuit and flow.

The connecting piece 2 is fluidically connected to one end side suction chamber 3 , viewed in the direction of advancement r, which extends transversely to the direction of advancement r in the floor suction opening and downwards, that is to say facing the area to be maintained. Ground 4 forms a slit suction nozzle 5.

In addition, a motor-driven, rotatable brush 6 is accommodated in the suction chamber 3 , which likewise extends transversely to the direction of advance r over almost the entire width of the suction chamber. For scrubbing the floor 4 , the bristles of the brush 6 protrude from the bottom 7 of the device via the suction nozzle 5 on the underside.

The suction chamber 3 or the suction nozzle 5 is bounded at the front and at the rear as viewed in the advancing direction r by a first delimiting device 8 which also extends transversely to the advancing direction r. They are designed in the form of slides 9 which, with their rounded edges delimiting the suction nozzles 5 , are in contact with the floor 4 to be treated.

The cross-section of the slide plate 9 is designed to be arc-shaped and arranged concentrically to the axis of the brush, and the slide plate 9 protruding from the bottom 7 of the device further downwards forms a suction in the direction of the inside of the device while maintaining the arc shape. cavity boundaries. The relevant section of the suction chamber wall is designated with the reference numeral 10 .

Furthermore, at a distance from the slide plate 9 which is ahead in the advancing direction r, there is provided a second delimiting device 11 in the form of a sealing lip 12 made of an elastically returnable material, for example rubber. A sealing lip 12 of this type or a second delimiting device 11 of this type is also provided behind the rear slide 9 , viewed in the advancing direction r. Both sealing lips 12 are attached to the device housing 13 or in the region of the device bottom 7 and, like the first delimiting device 8 , extend along the entire width of the floor suction opening 1 . Furthermore, the second delimiting device 11 extends vertically towards the floor 4 to be maintained, viewed in cross section, and a free edge of each sealing lip 12 , for example sharpened in cross section, rests lightly on the floor to be cleaned. 4 on or with a small distance therefrom. The described arrangement of the two second delimiting devices 11 virtually delimits the suction chamber 3 formed between them for establishing the vacuum required for the suction operation.

A central section, viewed along the width of the floor suction opening 1 , of the first delimiting device 8 at the front in the advancing direction r is designed as a sliding valve-like movable part 14 which runs on a circle extending concentrically to the brush axis x. Guidance on the arc. The length of the movable part 14 measured along the width direction of the floor dust suction opening 1 is approximately equal to one-third of the width of the floor dust suction opening.

The movable part 14 is positioned centrally between the two fixed parts 15 of the first delimiting device 8 .

Furthermore, the movable part 14 of the first delimiting device 8 has, on the side facing away from the suction chamber, a support ridge 16 formed on it. When the movable part 14 of the first delimiting device 8 is in the lowered position shown in FIG. The latter has a protrusion 17 in contact with the supporting ridge 16 in the corresponding section.

The second delimiting device 11 or the sealing lip 12 is slotted along the width of the movable part 14 of the first delimiting device 8 in order to form a lip-shaped partition.

The movable part 14 of the first delimiting device 8 is connected with a control slide valve 19 arranged at the upper outer surface 18 of the floor dust suction opening 1 through a transmission rod 18 . By means of the control slide valve 19 , the movable part 14 of the first delimiting device 8 can be transferred from the vertically lowermost position shown in FIG. 2 into an upper position by manual actuation by the user.

The movable part 14 of the first delimiting device 8 is designed as an effective air slide valve, while the slide plate 9 is formed in this region. In addition, a part of the slide valve, the bearing ridge 16 , supports the front sealing lip 12 inwardly. The cross-section and the material of the front sealing lip 12 are selected at least in the region of the movable part 14 such that no excessive air enters the suction chamber 3 inwards by means of this support ridge 16 on so-called standard carpets. If the slide valve or movable part 14 of the first delimiting device 8 is now moved upwards on a circular path as shown in FIG. 3 , the correspondingly arranged sealing lip 12 loses its inward support. It thus allows air to flow into the suction chamber 3 when the vacuum is too high, while the sealing lip 12 is bent inwards at the same time. The result is a reduction in slippage forces. This also has the advantage that coarse objects can now enter below the sealing lip 12 and are no longer blocked by the sliding plate in this area, since they have been transferred upwards. Furthermore, the sealing lip 12 nevertheless remains inserted more or less continuously into the carpet pile. This results in a constant fabric appearance over the entire width of the suction opening on so-called patterned carpets. When the vacuum is too high, air flows through the carpet under the sealing lip 12, which is also used to dislodge dirt and transport it into the suction chamber.

By means of the control slide valve 19 , the sliding force can be adjusted by influencing the negative pressure, whereby the movable part 14 of the first delimiting device 8 is raised or lowered to a greater or lesser extent.

5 to 7 represent a second embodiment of the floor dust suction opening 1 according to the present invention, which differs from the previously described embodiments in that the two sides of the first delimiting device 8 are designed along the width of the floor dust suction opening 1. There are two movable parts 14, which are always arranged between the two fixed parts 15 of the first delimiting device 8. A central fastening section 20 of the first delimiting device 8 is arranged therein, which is configured in the shape of a wedge with a wedge top 21 facing the advancing direction r. The central fastening section 20 of the first delimiting device 8 is connected to the two outer fastening parts 15 via bridges 22 .

With this arrangement, two sections are produced on the front side of the floor suction opening 1 in the region of the first front delimiting device 8 , which can be used as effective air openings. The moving part 14 of the first delimiting device 8 , which releases the active air opening, is connected to one another above the slide structure and can be displaced jointly by the drive rod 25 and the slide valve 19 as in the first embodiment.

The central fastening part 20 of the first delimiting means 8 is shaped like a snowboard. If the crude material reaches the wedge top 21 of the central part 20 when the coarse material slide valve is opened, that is, the movable delimiting device 14 is lifted, the coarse material passes through the fixed part from left or right under the support of propulsion and air flow. Part 20 is introduced sideways into suction chamber 3 . By providing the central fixing part 20, the clear span of the carpet floor to be treated in the area of the active air opening, that is to say in the area released by lifting the movable part 14, is roughly divided equally, thereby preventing the suction of particularly dense carpet sections into the suction area. Inside mouth 5. Thus, said central fixing portion 20 acts as a hold-down device.

All disclosed features are essential to the (present) invention. The disclosure content of the present application also includes the disclosure content of the associated/attached priority documents (prior applications), for which reason the features of these documents are also fully within the scope of protection of the present application.

Claims (16)

1. A ground dust suction port (1) of a vacuum cleaner, which has a suction chamber (3) forming front and rear boundaries along the propulsion direction (r) through the first delimiting device (8), wherein, in the A rotatable brush (6) is provided inside the suction chamber (3), and the suction chamber (3) has a width equal to the extension length of the suction chamber transverse to the advancing direction (r), and its characteristic It is: the part of the first delimiting device (8) constituting the front boundary of the suction chamber (3) is fixed along the partial width of the suction chamber (3) and is 0.25 to 0.5 is slidable; and the movable part (14) of said first delimiting device capable of said spool can be raised and lowered to affect the sliding force of the floor suction opening. 2. The floor dust suction port according to claim 1, characterized in that the movable part (14) of the first delimiting device (8) is arranged on the two fixed parts of the first delimiting device (8). Center between parts (15). 3. The floor suction opening according to claim 1, characterized in that, in any case corresponding to the movable part (14) of the delimiting device (8), a second Two delimiting devices (11). 4. The floor dust suction opening according to claim 3, characterized in that, the second delimiting device (11) is designed as a lip. 5. The floor dust suction opening according to claim 3, characterized in that the second delimiting device (11) is made of a material that can be elastically restored. 6. The floor dust suction opening according to any one of claims 3 to 5, characterized in that, the second delimiting device (11) is on the movable part of the first delimiting device (8) ( 14) Obtain support on the first delimiting device when in a sinking state. 7. The floor dust suction opening according to any one of claims 3 to 5, characterized in that the movable part (14) of the first delimiting device (8) supports the second delimiting device (11) and are designed with support ridges (16). 8. Floor suction opening according to claim 7, characterized in that the supporting ridge (16) has a length in the direction of the floor which is smaller than the first delimiting means (8). 9. The floor suction opening according to any one of claims 3 to 5, characterized in that a gap is formed between the first delimiting device (8) and the second delimiting device (11). 10. The floor dust suction opening according to claim 4, characterized in that the second delimiting device (11) is always supported on the movable part of the first delimiting device (8) in order to form a lip-shaped partition. within the area of part (14). 11. The floor dust suction opening according to any one of claims 1 to 5, characterized in that two of the first delimiting devices (8) are designed along the width of the ground dust suction opening (1). Movable parts (14), which are always arranged between the two fixed parts (15) of the first delimiting means (8). 12. The floor dust suction opening according to claim 11, characterized in that a central fixed section (20) of the first delimiting device (8) constituting the front boundary of the suction chamber (3) is provided. 13. The floor dust suction opening according to claim 12, characterized in that the central fixing section (20) of the first delimiting device (8) is shaped to have a wedge facing the advancing direction (r) The wedge shape of the top (21). 14. Floor suction opening according to any one of claims 1 to 5, characterized in that the movable part (14) of the first delimiting device (8) is moved by means of a control slide valve (19) . 15. The floor dust suction port according to claim 14, characterized in that the control slide valve (15) is installed on the upper outer surface (18) of the floor dust suction port (1). 16. Floor suction opening according to claim 1, characterized in that the movable part (14) of the first delimiting device (8) is guided on a circular arc segment.

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