EP2987444B1

EP2987444B1 - Floor nozzle

Info

Publication number: EP2987444B1
Application number: EP14192755.8A
Authority: EP
Inventors: Xiaoquan LIN
Original assignee: Suzhou Grand Electric Co Ltd
Current assignee: Suzhou Grand Electric Co Ltd
Priority date: 2014-08-22
Filing date: 2014-11-12
Publication date: 2018-01-03
Anticipated expiration: 2034-11-12
Also published as: CN104146658A; CN104146658B; EP2987444A1

Description

FIELD OF THE INVENTION

The present invention relates to the field of cleaning products, specifically to a vacuum cleaner nozzle that can be used in a vacuum cleaner.

BACKGROUND OF THE INVENTION

GB 543,133 A describes a vacuum cleaner nozzle, in which the lower and upper flanged edges of lower and upper suction openings (i.e. of a big and a small suction opening), are provided with tooth-like projections, respectively. The tooth-like projection projects at the edge of the bottom of the nozzle for preventing the nozzle from directly sticking to the floor or carpet.
GB 2 470 407 A describes an attachment for a vacuum cleaner appliance, comprising a handle and a base of a bristle cover mounted on the bottom of the handle. A conduit disposed in the handle is provided with a suction opening located at the base. Some apertures are formed on front and rear sides of the suction opening on the base.
AT 117 295 B describes a vacuum cleaner nozzle, comprising a nozzle body, a primary duct being disposed in the nozzle body and provided with a primary duct opening. Some projections form some groove-type auxiliary ducts on front and rear sides of the primary duct opening on the bottom of the nozzle body.
EP 2 060 219 A2 describes a vacuum cleaner nozzle, comprising a brush body and a suction plate mounted on the bottom of the brush body. A primary duct is disposed in the brush body and is provided with a primary duct opening located at the suction plate.
The vacuum cleaner nozzle currently sold on the market has a nozzle underplate that is of a faceplate structure of a plate or a plane plus an incline. When such a vacuum cleaner nozzle is used on a carpet, the flat lower surface of the nozzle underplate will be completely fit with the carpet, making the exterior air current hard to enter the nozzle duct, with the vacuum cleaner nozzle inhaling dust totally depending on the degree of vacuum without taking full advantage of the air-volume vacuum function; besides, the large-particle dust hidden in the carpet wool cannot enter the nozzle duct so as to be taken away because the carpet wool is pressed down tightly, which results in the worse vacuum effect.

CONTENTS OF THE INVENTION

A purpose of the present invention is as follows: In order to solve the above problems, the present invention provides a vacuum cleaner nozzle of a new structure, which can increase the air volume of the vacuum cleaner nozzle without substantially decreasing the degree of vacuum of the vacuum cleaner nozzle, thus improving the vacuum efficiency of the nozzle, with the movement resistance of the vacuum cleaner nozzle on the carpet reduced as well.
A technical solution of the present invention is as follows: The vacuum cleaner nozzle according to claim 1. The present invention has the following advantages: When this vacuum cleaner nozzle of the present invention is in use, the groove-type auxiliary duct on the bottom of the vacuum cleaner nozzle reduces the region where the nozzle underplate compresses the carpet, correspondingly reducing resistance of the air current in the carpet, thus increasing the air volume when the vacuum cleaner nozzle is vacuuming the carpet, which is conducive to the use of air volume to take away the dust on the carpet, improvement of the vacuum capability of the vacuum cleaner nozzle, and reduction of the movement resistance of the vacuum cleaner nozzle on the carpet as well. Meanwhile, the convex rib on the bottom of the vacuum cleaner nozzle will also poke aside the carpet wool on the carpet, comb the compact carpet wool loose, and make the particulates hidden in carpet wool taken by the air current into the primary duct and then into a dust-collecting device, further improving the dust removal capability of the vacuum cleaner nozzle. The separation rib disposed at the junction of the primary duct with the groove-type auxiliary duct plays a role in sealing the primary duct opening, and ensuring a negative air pressure at the primary duct opening when the vacuum cleaner nozzle is in operation; besides, when the vacuum cleaner nozzle is working on the carpet, the separation rib can go deeper into the carpet, thus achieving the improved vacuum efficiency for the carpet.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention will be further described below with reference to the drawings and examples.

Fig. 1 is a structural schematic view of the bottom of the vacuum cleaner nozzle of an example of the present invention;
Fig. 2 is a structural schematic view of the side of the vacuum cleaner nozzle of an example of the present invention; and
Fig. 3 is a structural schematic view of the bottom of the vacuum cleaner nozzle of the present invention having another specific structural form;

DETAILED DESCRIPTION OF THE EMBODIMENTS

Figs. 1 and 2 show a specific example of this vacuum cleaner nozzle of the present invention that, to be the same with the traditional vacuum cleaner nozzle, also comprises a nozzle body 1, a nozzle underplate 2 mounted on the bottom of the nozzle body, and a primary duct 3 disposed in the nozzle body 1, the primary duct 3 being provided with a primary duct opening 3a located at the nozzle underplate 2.
The key improvement of this example is that some groove-type auxiliary ducts 5 are formed on the front and rear sides of the primary duct opening 3a on the bottom of the nozzle underplate 2, and a separation rib 6 for preventing air leakage is disposed at the junction of the primary duct 3 with the groove-type auxiliary duct 5.
There is a certain distance between every two adjacent groove-type auxiliary ducts 5, and thus a convex rib 4 is formed therebetween.
It is thus clear that in this example the groove-type auxiliary duct 5 and the primary duct 3 are not in direct communication with each other, but have a separation rib 6 disposed therebetween to separate them, which is advantageous to ensure the degree of vacuum at the primary duct opening; besides, the separation rib 6 plays a role in sealing the primary duct opening 3a, which ensures a negative air pressure at the primary duct opening 3a when the vacuum cleaner nozzle is in operation; moreover, when the vacuum cleaner nozzle is working on the carpet, the separation rib 6 can go deeper into the carpet, thus achieving the improved vacuum efficiency for the carpet. Without the separation rib 6, the groove-type auxiliary duct 5 will be in direct communication with the primary duct 3, which will greatly increase the ventilation area of the primary duct opening 3a with the external world, and result in an air leakage problem at the primary duct opening 3a, thus significantly decreasing the suction of the primary duct 3 and reducing the dust removal capability of the vacuum cleaner nozzle.
With reference to Figs. 1 and 2 again, the operational principle of this vacuum cleaner nozzle of the example will be described as follows: While in use, this vacuum cleaner nozzle is connected to a vacuum cleaner that is then powered on, and then the vacuum cleaner nozzle is placed on the carpet in a position and state as shown in Fig. 2 and meanwhile pushed along the carpet surface for vacuuming the carpet; in the process of moving the vacuum cleaner nozzle, the groove-type auxiliary duct 5 on the bottom of the vacuum cleaner nozzle reduces the region where the nozzle underplate 2 compresses the carpet, which correspondingly reduces resistance of the air current in the carpet, and thus increases the air volume when the vacuum cleaner nozzle is vacuuming the carpet; besides, the separation rib 6 disposed between the primary duct 3 and the groove-type auxiliary duct 5 can prevent air leakage at the primary duct opening, which well guarantees the degree of vacuum at the primary duct opening and the vacuum capacity of the primary duct, conducive to the use of air volume to take away the dust on the carpet and improvement of the vacuum capability of the vacuum cleaner nozzle. Meanwhile, the convex rib 4 on the bottom of the vacuum cleaner nozzle will also poke aside the carpet wool on the carpet, comb the compact carpet wool loose, and make the particulates hidden in the carpet wool taken by the air current into the primary duct 3, which further improves the dust removal capability of the vacuum cleaner nozzle.
In this example, at a junction of the separation rib 6 with the convex rib 4, the lower surface of the separation rib 6 is flush with the lower surface of the convex rib 4; that is, at a junction of the separation rib 6 with the convex rib 4, the separation rib 6 and the convex rib 4 have a lower surface with the same height. Besides, the lower surface of the convex rib 4 is gradually elevated into a certain slope in a direction from being close to the separation rib 6 to being away from the separation rib 6; such an arrangement is also made for further ensuring a negative air pressure at the primary duct opening, so as to improve the dust removal capability of the vacuum cleaner nozzle. Certainly, the height relation between the lower surfaces of the separation rib 6 and convex rib 4 can also be set into other forms.
The number of the separation rib 6 can be set to be more than one, and the separation rib 6 can be of a linear structure or a curvilinear structure. It is of a linear structure in this example.
It is found by the designer through tests that a traditional vacuum cleaner nozzle not of the above structure, while in operation, has a carpet dust removal rate of 74.8% (the dust removal capacity is Grade F), and a forward movement resistance of 45 N. While this vacuum cleaner nozzle of the present invention of the above structure, while in operation, has a carpet dust removal rate of 81.1% (the dust removal capacity is Grade D), and a forward movement resistance of 30 N. It can be seen that, after adopting this structure of the present invention, the carpet dust removal capability of the vacuum cleaner nozzle is increased from Grade F to Grade D, and the movement resistance is decreased by 33%, thus the user's operational comfort being improved.
In this example, these groove-type auxiliary ducts 5 are of a linear structure, and correspondingly each of the convex ribs 4 is also of a linear structure; certainly, a groove-type auxiliary duct 5 of a curvilinear structure can also be used, and achieve the same effects as above. It can be seen from Fig. 1 that the respective convex ribs 4 are arranged on the nozzle underplate 2 in a comb-teeth form.
In this example, the primary duct opening 3a has an elongated shape, and the groove-type auxiliary duct 5 is disposed vertically to the primary duct opening 3a; wherein an angle between the length direction of the groove-type auxiliary duct 5 and the length direction of the primary duct opening 3a is greater than 0° but not greater than 90°, with the length of the groove-type auxiliary duct 5 extending in the front and rear direction. Certainly, the angle between the length direction of the groove-type auxiliary duct 5 and the length direction of the primary duct opening 3a can also be set to have any degree of angle within the range of 0° to 90° (inclined, vertical, or horizontal), which can also achieve the same effects as above.
Because in this example two electrostatic strips 7 are disposed on the front and rear sides at the center of the primary duct opening 3a, no groove-type auxiliary duct 5 is disposed on the front and rear sides at the center of the primary duct opening 3a. If no electrostatic strip 7 is disposed at the primary duct opening 3a, the groove-type auxiliary ducts 5 can be disposed all over on the front and rear sides of the primary duct opening 3a on the nozzle underplate 2, as shown in Fig. 3.
Certainly, the above examples are used only for explaining the technical concept and characteristics of the present invention. They are provided to make people understand the present invention and implement it, rather than limit the scope of protection of the present invention.

Claims

A vacuum cleaner nozzle, comprising:
a nozzle body (1),

a nozzle underplate (2) mounted on the bottom of the nozzle body (1), and

a primary duct (3) disposed in the nozzle body (1), the primary duct (3) being provided with a primary duct opening (3a) located at the nozzle underplate (2), wherein the primary duct opening (3a) has an elongated shape,

wherein some trench-type auxiliary ducts (5) are formed on front and rear sides of the primary duct opening (3a) on the bottom of the nozzle underplate (2), and a separation rib (6) is disposed at a junction of the primary duct (3) with the trench-type auxiliary duct (5), wherein there is a certain distance between every two adjacent trench-type auxiliary ducts (5), and thus a convex rib (4) is formed therebetween; wherein at said junction, which is also a junction of the separation rib (6) with the convex rib (4), a lower surface of the separation rib (6) is flush with a lower surface of the convex rib (4),

characterized in that

said convex rib (4) is suitable for combing carpet wool loose, when moving said vacuum cleaner nozzle in a direction perpendicular to said separation rib (6), wherein an upper bottom of said trench-type auxiliary duct (5) on said front side of the said primary duct opening (3a) runs in a common plane with an upper bottom of said trench-type auxiliary duct (5) on said rear side of the said primary duct opening (3a).
The vacuum cleaner nozzle according to claim 1, wherein the lower surface of the convex rib (4) is gradually elevated in a direction from being close to the separation rib (6) to being away from the separation rib (6).
The vacuum cleaner nozzle according to claim 1, wherein the separation rib (6) is of a linear structure.
The vacuum cleaner nozzle according to claim 1, wherein the separation rib (6) is of a curvilinear structure.
The vacuum cleaner nozzle according to claim 1, wherein the trench-type auxiliary duct (5) is of a linear structure.
The vacuum cleaner nozzle according to claim 5, wherein an angle between the length direction of the trench-type auxiliary duct (5) and the length direction of the primary duct opening (3a) is within the range of 0° and 90°.
The vacuum cleaner nozzle according to claim 6, wherein the trench-type auxiliary duct (5) is disposed vertically to the primary duct opening (3a).
The vacuum cleaner nozzle according to claim 1, wherein the trench-type auxiliary duct (5) is of a curvilinear structure.