Floor brush and vacuum cleaner

Abstract

Provided are a floor brush and a vacuum cleaner, which can practically prevent hair from tangling around a rolling brush assembly, relating to the field of vacuum cleaners. The floor brush comprises: a floor brush main body (21); an accommodating cavity (22) for accommodating a rolling brush assembly (23), the bottom of which is provided with a cleaning opening (221); an air outlet pipe (24) penetrating the accommodating cavity (22) from outside to inside and forming an air outlet (242) facing the rolling brush assembly (23) and adjacent to the rolling brush assembly (23) on the inner wall of the accommodating cavity (22) to guide negative pressure to the accommodating cavity (22); and a traction portion (25) arranged in the accommodating cavity (22), used for pulling hair away from the rolling brush assembly (23), and comprising: at least one row of traction teeth (251, 252) arranged at intervals along the axial direction of the rolling brush assembly (23) and having tooth tips pointing to the rolling brush assembly, wherein a space region in the accommodating cavity (22) extending from the edge of the air outlet (242) to the surface of a rolling body of the rolling brush assembly (23) along the penetrating direction of the air outlet pipe (24) is denoted as a space A, the position of the space A is kept unchanged, the cross section area of the space A is enlarged by at least 50% in an equal proportion mode to obtain a space B as an anti-turbulence region, the traction portion (25) is formed outside the anti-turbulence region, and traction teeth (251, 252) are formed on the left and right sides of the air outlet (242).

Description

Floor brush and vacuum cleaner TECHNICAL FIELD

[0001] The present application belongs to the field of floor brush, and particularly relates to a floor brush and a vacuum cleaner. BACKGROUND

[0002] In a vacuum cleaner, a high-speed rotation of an electric fan generates negative pressure, thereby forming a high-speed airflow from the outside to the inside, and through the high-speed airflow, dust, hair and other dirt on a surface to be cleaned near the floor brush are transported into a dust collecting barrel of the vacuum cleaner. In order to more effectively collect the dirt, a rotatable roller brush is usually arranged in the floor brush, and the roller brush is in contact with the surface to be cleaned through an opening of the floor brush. During rotation of the roller brush, the bristles continuously beat and rub against the surface to be cleaned, so as to cause the dirt to be loosened and separated from the surface to be cleaned, and the dirt is more easily transported into the vacuum cleaner by the airflow.

[0003] When there are more long hairs on the surface to be cleaned, the hairs are easily entangled with the roller brush, and the entanglement becomes tighter and tighter, and then the hairs hang dust particles or other hairs, so that the dirt is accumulated and entangled on the surface of the roller brush and cannot be sucked into the vacuum cleaner, and the cleaning effect is poor. When serious entanglement occurs, the roller brush cannot even rotate. Therefore, the user needs to pay special attention to the hair entanglement, and manually clean the hair and other dirt on the roller brush instead of sucking them into the vacuum cleaner, which brings additional burden to the user.

[0004] In order to solve the problem of hair entanglement with the roller brush, the prior art CN2021101452788 proposes a floor brush, a hair removing tooth assembly and a movable device, a first hair removing tooth group and a second hair removing tooth group are arranged in a roller brush cavity, the first hair removing tooth group is located at a middle position of a wind port of a suction air duct, and the first hair removing tooth extends from a top of the roller brush cavity to a region between the roller brush and the wind port of the suction air duct away from an end of a first support plate, so as to comb the hair and other dirt from the roller brush, and the plurality of first hair removing teeth and the plurality of second hair removing teeth are staggered, so as to stagger comb the hair and other dirt on the roller brush. However, such a design causes nearly half of the wind port to be blocked by the first hair removing tooth group, the air flow of the wind port is greatly reduced, the air resistance is greatly increased, the area of the wind port is reduced, the probability of the dirt entering the wind port is reduced, the cleaning efficiency is reduced, and the corresponding flow of the roller brush cavity on both sides is further reduced, especially the air flow of the extreme left and extreme right sides near the two ends of the roller brush is the lowest, and the hair is more easily entangled with the roller brush instead of being brought into the wind port by the airflow. Moreover, the first hair removing tooth and the second hair removing tooth are staggered, which causes greater turbulence in the roller brush cavity, the airflow is chaotic, the front end of the hair is randomly arranged, and the front end is blocked, so that the hair is more easily arranged to the rear to entangle the roller brush. SUMMARY

[0005] The present application is carried out in order to solve the above problems, and aims to provide a floor brush and a vacuum cleaner, which can effectively avoid hair entanglement with the roller brush and improve the cleaning efficiency.

[0006] In order to achieve the above object, the present application adopts the following scheme:

[0007] <Brush>

[0008] The present application provides a brush, which is matched with a ventilation pipe of a vacuum cleaner and communicates with the ventilation pipe, and uses the suction airflow generated by the negative pressure of the vacuum cleaner to clean the dirt on the surface to be cleaned, comprising: a brush main body; a containing cavity located in the brush main body and used for containing a roller brush assembly, the bottom of the containing cavity having a cleaning opening facing the surface to be cleaned; an air outlet pipe, the outer end of the air outlet pipe being matched with the ventilation pipe and communicating with the ventilation pipe, the air outlet pipe extending through the containing cavity from the outside to the inside and forming an air outlet opening in the inner wall of the containing cavity, the air outlet opening facing the roller brush assembly and being adjacent to the roller brush assembly, the negative pressure being guided to the containing cavity, so as to form a high-speed airflow from the cleaning opening to the air outlet opening; a traction part provided in the containing cavity and used for pulling the hair away from the roller brush assembly, comprising: at least one row of traction teeth, which are arranged in the axial direction of the roller brush assembly and have tooth tips pointing to the roller brush assembly; wherein a space region extending from the edge of the air outlet opening to the surface of the roller body of the roller brush assembly along the extension direction of the air outlet pipe in the containing cavity is recorded as space A, the position of space A is kept unchanged, the cross-sectional area of space A is enlarged by at least 50% in proportion to obtain space B as a anti-interference airflow region, the traction part is formed outside the anti-interference airflow region, and the traction teeth are formed on both sides of the air outlet opening.

[0009] The beneficial effect of the above scheme is that the anti-turbulence area corresponds to the air outlet, the suction is the largest and the airflow speed is the largest, no blocking structure is arranged in the area, the air flow of the anti-turbulence area is maximized, the hair tip in the area cannot be randomly arranged, but is pulled to the air outlet by the strong wind generated by the high-speed and large-flow airflow, and the subsequent part of the hair is quickly separated from the roller brush assembly and enters the air outlet with the wind. At the same time, since the air flow of the anti-turbulence area is greatly improved, the air flow components in the left and right areas of the accommodation cavity are also correspondingly improved, and the wind force of the hair in the left and right areas, especially the extreme left and right areas, towards the air outlet direction is also greatly enhanced. Taking the hair in the extreme left / right area with the smallest air flow and the smallest wind force as an example, during the process that the hair tip is picked up from the cleaning opening by the roller brush assembly rotating at high speed and is flung upward, the hair tip can quickly move close to the traction part and wind around the main traction tooth (similar to a whip winding around a top), and the hair tip is tractioned by the main traction tooth. In this way, on the one hand, the hair tip is subjected to the reverse pulling force of the traction tooth, so that it cannot be randomly arranged to merge with the subsequent part and then wind around the roller body; on the other hand, the subsequent part of the hair (referred to as the main body of the hair) will be tractioned to separate from the roller brush assembly and subjected to the wind force of the airflow acting on it to move towards the air outlet. Since the airflow is blocked at the main traction tooth, the wind force acting on the hair tip is smaller than that acting on the main body of the hair. Under the action of the wind force, the main body of the hair drives the hair tip to be unwound from the main traction tooth (the wind force pulls the hair to be unwound from the traction tooth), and then enters the air outlet with the wind. Therefore, the present application can separate the hair in any area of the accommodation cavity, including the extreme left and right areas, from the roller brush assembly and enter the air outlet, and effectively avoid the problem of hair winding.

[0010] Preferably, in the floor brush provided by the present application, the traction part comprises at least one row of main traction teeth formed on the left and right sides of the air outlet, and a plurality of rows of auxiliary traction teeth formed at a distance from the main traction teeth along the rotation direction of the roller brush assembly; the rows of traction teeth are not staggered with each other. The rows of traction teeth (main and auxiliary) are aligned rather than staggered, which can reduce turbulence and maintain hair capturing ability, the hair that is not wound around the main traction tooth has the opportunity to wind around the auxiliary traction tooth, which improves the traction efficiency, and effectively avoids the obstruction and disturbance of the traction teeth to the airflow, improves the stability, directionality and air flow of the airflow in the accommodation cavity, and further improves the hair cleaning effect.

[0011] Preferably, in the floor brush provided by the present application, the shortest distance between the lowest point and the highest point of the air outlet is taken as the opening height of the air outlet, the air outlet is equally divided into lower, middle and upper parts based on the opening height, and the main traction unit is formed on the left and right sides of the middle part of the air outlet. In this way, the anti-turbulence effect and the cleaning effect are better. The area closest to the surface to be cleaned / cleaning opening is the lower part.

[0012] Preferably, in the floor brush provided by the present application, the cross-sectional area of space B is 60% larger than that of space A. In this way, the anti-turbulence effect and cleaning effect are better.

[0013] Preferably, the floor brush provided by the present application further comprises: a rolling brush assembly detachably mounted in the accommodating cavity, comprising a rotatable rolling body and a plurality of brush strip units mounted on the rolling body; wherein the brush strip units are arranged to be V-shaped as viewed in the direction of rotation of the rolling brush assembly, having two wings extending from the left and right ends of the rolling body to the middle part with gradually tightened spacing and a middle section connecting the two wings; the thickness or density of the two wings is not less than twice that of the middle section. During rotation of the brush strip units, the outermost ends of the two wings first contact the hair and other dirt on the surface to be cleaned, the two wings have large density and are not easy to be penetrated by wind (high-speed airflow), so the wind is more likely to flow along the outermost ends of the two wings to the middle section of the V shape, thereby pushing the hair from the two sides to the middle section; the middle section has small density, small resistance, is closer to the air outlet and is more easily penetrated by wind, so that the hair accumulated in the middle section is more easily blown away from the middle section and quickly flies into the air outlet.

[0014] Preferably, the floor brush provided by the present application further comprises: a rolling brush assembly detachably mounted in the accommodating cavity, comprising a rotatable rolling body and at least two brush strip units mounted on the rolling body; wherein the brush strip units are arranged in a figure-eight shape, having two wings extending from the left and right ends of the rolling body to the middle part with gradually tightened spacing in the axial direction of the rolling body, and finally forming a tightening opening; and along the direction of rotation of the rolling body, the tightening opening of at least one brush strip unit is staggered with the tightening opening of the other brush strip unit as viewed in the direction of rotation of the rolling body; the rotational track of the tightening opening of any one brush strip unit is fully covered by the rotational tracks of the two wings of another brush strip unit or multiple brush strip units during each rotation of the rolling body. Through such a structural arrangement, on the one hand, each rotation period (one full rotation in the circumferential direction) of the rolling brush assembly is stable, and there is no any gap, and the surface to be cleaned corresponding to the length direction of the rolling brush assembly will be contacted and cleaned by the brush strip units, the cleaning track is complete, and the dirt residue is small; on the other hand, the airflow speed at the tightening opening is fast, so that the central hair is quickly sucked away, the high-speed airflow causes negative pressure, and the hair on both sides is attracted, so that the hair and other dirt is more easily transported from the two ends of the brush strip unit to the middle section / tightening opening, and more easily enters the air outlet from the tightening opening along the airflow.

[0015] Further, in the floor brush provided by the present application, the center of the tightening opening of at least one brush strip unit deviates from the center in the length direction of the brush strip by a certain distance, and the rotational track of the tightening opening passes through the anti-turbulence area. In this way, the hair and other dirt is more easily transported from the two ends of the brush strip unit to the middle section / tightening opening, and more easily enters the air outlet from the tightening opening along the airflow.

[0016] Further, the floor brush provided by the utility model has the advantages that the center of the tightening opening of at least one group of brush strip units is located at the center in the length direction of the brush strip, and the rotating track of the tightening opening passes through the space A. Thus, dirt such as hair is more easily guided from the two ends of the brush strip unit to the middle section / tightening opening, and is more easily guided into the air outlet from the tightening opening along the airflow.

[0017] Preferably, the floor brush provided by the utility model further comprises: a roller brush assembly detachably mounted in the accommodating cavity, comprising a rotatable roller body and at least three groups of brush strip units mounted on the roller body; wherein each group of brush strip units comprises a brush strip and a brush strip base in which the brush strip is inserted; the brush strip is inserted into the brush strip base in a spread shape, has two wings extending from the left and right ends of the roller body to the middle part and gradually tightening in the axial direction of the roller body, and finally forms a tightening opening; the center of the tightening opening is offset from the center in the length direction of the brush strip by a certain distance; the at least three groups of brush strip units are formed by installing the same kind of brush strip, and the tightening openings of the two groups of brush strips are completely staggered in the rotating direction of the roller body by installing the brush strip of at least one brush strip unit in the opposite direction of the brush strip of any other brush strip unit. Through such a structure, on the one hand, each rotating period (one complete rotation in the circumferential direction) of the roller brush assembly is stable, and there is no any gap, and the surface to be cleaned corresponding to the length direction of the roller brush assembly will be contacted and cleaned by the brush strip, the cleaning track is complete, and the dirt residue is small; on the other hand, the airflow speed is fast at the tightening opening, so that the center hair is quickly sucked away, the high-speed airflow causes negative pressure, and the two side hairs are attracted, so that the dirt such as hair is more easily guided from the two ends of the brush strip to the middle section / tightening opening, and is more easily guided into the air outlet from the tightening opening along the airflow; in addition, the same kind of brush strip is installed from the left and right ends of the roller body or the brush strip is reversed, so that the mutually staggered distribution of the tightening openings is formed, and the manufacturing, insertion and inspection of the parts are more convenient.

[0018] Preferably, the floor brush provided by the present application further comprises: a roller brush assembly detachably mounted in the accommodating cavity, comprising a rotatable roller body and at least three groups of brush strip units mounted on the roller body; wherein each group of brush strip units comprises a brush strip and a brush strip base on which the brush strip is inserted; the brush strip inserted on the brush strip base is in a spread-tail shape, having two wings extending from the left and right ends of the roller body to the middle part and gradually tightening in the axial direction of the roller body, and finally forming a tightening opening; the three groups of brush strip units are formed by using two kinds of brush strips, the tightening opening of the first kind of brush strip is located at the center in the length direction of the brush strip, and the tightening opening of the second kind of brush strip deviates from the center by a certain distance; the roller body has one group of the first kind of brush strip and two groups of the second kind of brush strip, one group of the second kind of brush strip is reversely mounted relative to the other group of the second kind of brush strip, and the tightening openings of the three groups of brush strips are staggered with each other as viewed in the rotating direction of the roller body; the rotating track of the tightening opening of any one group of brush strips is fully covered by the rotating tracks of the two wings of another group or multiple groups of brush strips in each rotation of the roller body. Through such a structural arrangement, on the one hand, each rotation period (one full rotation in the circumferential direction) of the roller brush assembly is stably rotated, and there is no any gap, and the surface to be cleaned corresponding to the length direction of the roller brush assembly will be contacted by the brush strip and cleaned by the brush strip, the cleaning track is complete, and the dirt residue is small; on the other hand, the airflow speed at the tightening opening is fast, so that the hair at the tightening opening is quickly sucked away, the high-speed airflow causes negative pressure to attract the hair on both sides, so that the hair and other dirt are more easily transported from the two ends of the brush strip to the middle section / tightening opening, and are more easily entered into the air outlet from the tightening opening along with the airflow.

[0019] Preferably, in the floor brush provided by the present application, the extension direction of the brush strip from the root to the top of the roller brush assembly or the extension line of the brush filament intersects or does not intersect with the axis of the roller body; the thickness of the two wings of the brush strip is not less than 3mm. The extension line of the single brush filament does not intersect with the axis of the roller body, so that the contact area between the brush filament and the hair and other dirt is larger, and the hair and other dirt is less likely to be clamped by the brush filament. The thickness of the two wings is not less than 3mm, which can make the airflow flow from the two ends to the middle part as much as possible.

[0020] Preferably, the floor brush provided by the present application further comprises: a roller brush assembly detachably mounted in the accommodating cavity, comprising: a rotatable roller body, a plurality of brush strip units protruding on the surface of the roller body, and two end covers located at the two ends of the roller body and rotating synchronously with the roller body; wherein the brush strip units extend in an arc shape on the surface of the roller body, the end cover is provided with an arc slope, and the windward side of at least one brush strip unit is smoothly connected with one arc slope to form a guide vane together for guiding the airflow from the end cover to the middle part of the roller body.

[0021] <Vacuum cleaner>

[0022] Further, the present application also provides a dust collector, comprising: a dust collector body having a negative pressure source generating negative pressure and a ventilation duct transmitting the negative pressure outward; and a floor brush in matched communication with the ventilation duct, cleaning dirt on a surface to be cleaned by using the negative pressure to generate suction airflow; wherein the floor brush is the floor brush described in the <Dust collector> above. Based on the same improved technology, the floor brush has the same beneficial effects as the <Floor brush>. BRIEF DESCRIPTION OF DRAWINGS

[0023] Fig. 1 is a structural schematic diagram of a dust collector according to an embodiment of the present application;

[0024] Fig. 2 is a structural schematic diagram of a floor brush according to an embodiment of the present application;

[0025] Fig. 3 is a structural schematic diagram of a floor brush according to an embodiment of the present application;

[0026] Fig. 4 is a structural schematic diagram of a floor brush according to an embodiment of the present application, with a roller brush assembly removed;

[0027] Fig. 5 is a structural schematic diagram of a floor brush according to an embodiment of the present application, with a roller brush assembly removed;

[0028] Fig. 6 is a structural schematic diagram of a floor brush according to an embodiment of the present application, with a roller brush assembly removed;

[0029] Fig. 7 is a structural schematic diagram of a roller brush assembly according to an embodiment of the present application;

[0030] Fig. 8 is an exploded view of a roller brush assembly according to an embodiment of the present application;

[0031] Fig. 9 is a partial enlarged view of an end portion of a roller brush assembly according to an embodiment of the present application, wherein (a) is a perspective view and (b) is an elevation view;

[0032] Fig. 10 is a structural sectional view of a floor brush according to an embodiment of the present application, with a roller brush assembly and part of a housing removed;

[0033] Fig. 11 is a structural schematic diagram of a traction portion according to an embodiment of the present application;

[0034] Fig. 12 is a partial structural elevation view of a floor brush according to an embodiment of the present application, with a roller brush assembly and most of a housing removed;

[0035] Fig. 13 is a diagram showing the positional relationship between a roller body and spaces A and B according to an embodiment of the present application;

[0036] Fig. 14 is a structural schematic diagram of a brush strip according to a first modified example of the present application;

[0037] Fig. 15 is a structural schematic diagram of a brush strip according to a first modified example of the present application, after the brush strip is inserted into a brush strip base;

[0038] Fig. 16 is a structural schematic diagram of a brush strip according to a second variant of the present application;

[0039] Fig. 17 is a structural schematic diagram of a brush strip base and a brush strip according to the second variant of the present application. DETAILED DESCRIPTION

[0040] The specific embodiments of the floor brush and the dust collector according to the present application will be described in detail below with reference to the accompanying drawings.

[0041] <EMBODIMENT>

[0042] As shown in Fig. 1, the dust collector 1000 comprises a dust collector body 10 and a floor brush 20. In the present embodiment, the dust collector 1000 is a wireless dust collector capable of sucking dust, hair and other dirt on a surface to be cleaned by negative pressure.

[0043] The dust collector body 10 has a negative pressure source, an air duct 11 and a dust collecting mechanism. The negative pressure source is capable of generating negative pressure, the air duct 11 transmits the negative pressure to the surface to be cleaned, and the dust collecting mechanism is used to collect the dirt entering through the air duct 11.

[0044] The floor brush 20 is directly or indirectly connected in communication with the air duct 11 through an extension pipe, and uses the negative pressure to generate an air current to clean the dirt on the surface to be cleaned. As shown in Figs. 3-5 and 10, the floor brush 20 comprises a floor brush body 21, a containing cavity 22, a roller brush assembly 23, an air outlet pipe 24 and a traction part 25.

[0045] The floor brush body 21 comprises a shell 211 and a driving part (not shown in the figure). The driving part is arranged in the shell 211 and connected with the roller brush assembly 23, and comprises a driving motor for driving the roller brush assembly 23 to rotate at high speed around the length direction (axial direction) and a belt for connecting the driving motor and the roller brush assembly 23.

[0046] The containing cavity 22 is an independent cavity in the shell 211, used to contain the roller brush assembly 23, surrounded by the inner surface of the floor brush body 21 corresponding to the axial and circumferential directions of the roller brush assembly 23, and has a cleaning opening 221 at the bottom facing the surface to be cleaned.

[0047] As shown in Figs. 3 and 7, the roller brush assembly 23 is detachably installed in the containing cavity 22, has the same length direction as the containing cavity 22 and the cleaning opening 221, and comprises a roller body 231, three brush strip units 232 and two end covers 233.

[0048] The roller body 231 is connected with the driving motor through the belt and is capable of rotating at high speed around the axial direction, with a rotating speed generally being 2000-3000 r / min.

[0049] As shown in FIGS. 7-8, three groups of brush strip units 232 are evenly installed on the surface of the roller body 231 along the circumference, in a V shape, and rotate synchronously with the roller body 231. Adjacent brush strip units 232 are spaced 120° apart. Each group of brush strip units 232 includes a brush strip base 232a and a brush strip 232b. The brush strip base 232a is protrusively fixed on the surface of the roller body 231, and the brush strip base 232a is provided with an open slot extending continuously from the left end to the right end of the roller body. Since the brush strip base 232a protrudes from the surface of the roller body 231, the brush strip base 232a itself also forms a flow guide structure that pushes air towards the tip of the brush strip. The brush strip 232b can be a structure with bristles planted on a strip structure, or a non-bristle structure such as a rubber / plastic strip, etc. In this embodiment, the brush strip 232b is taken as an example of a strip structure with bristles planted thereon. The brush strip 232b is a long straight strip without directionality, with bristles arranged along the length direction, and with a lower density in the middle part. The brush strip 232b is installed in the V-shaped open slot of the brush strip base 232a, and after installation, the shape of the brush strip 232b is consistent with the shape of the open slot, and the left and right ends of the brush strip 232b only extend to the inner surface of the two end covers 233. In this embodiment, after installation, the brush strip 232b looks like a V shape along the direction of rotation of the roller brush assembly 23, with two wings 232b-1 and a middle section 232b-2. The two wings 232b-1 extend from the left and right ends of the roller body 231 to the middle part, and the distance between the two wings 232b-1 gradually tightens in the axial direction of the roller body 231. The middle section 232b-2 is used to connect the two wings 232b-1, and the length is not less than 1 / 5 of the length of the air outlet. The thickness or density of the bristles of the two wings 232b-1 is at least twice that of the middle section 232b-2, so that the airflow of the middle section 232b-2 is greater, faster, and stronger than that of the two wings 232b-1. The extension line of a single bristle in the brush strip unit 232 does not intersect the axis of the roller body 231. In this embodiment, the thickness of the two wings 232b-1 is about 5 mm. Moreover, the middle section 232b-2 is located in the middle part of the brush strip unit 232, and the middle part of the brush strip unit 232 corresponds to the air outlet 242. The brush strip unit 232 extends in an arc shape along the axial direction of the roller body 231 on the surface of the roller body 231, and the brush strip base 232a also extends in an arc shape on the surface of the roller body 231. The brush strip base 232a has two sides in the circumferential direction, both of which extend in an arc shape along the axial direction of the roller body 231. During the rotation of the brush strip base 232a from the cleaning opening 221 to the air outlet 242, one side is the windward side and is the first to be rotated to face the air outlet 242, and the other side is the leeward side and is located at the back of the brush strip 232b, and is the last to be rotated to face the air outlet 242.

[0050] Two end caps 233 are respectively located at both ends of the roller body 231, synchronously rotate with the roller body 231, and cover the brush bar base 232a of the brush bar unit 232 to seal the open slot of the brush bar base 232a. As shown in FIG. 9, each end cap 233 is provided with an arc-shaped slope 233a-1, and the windward side of at least one brush bar unit 232 is smoothly connected with one arc-shaped slope 233a-1 to form a guide vane that guides the airflow from the end cap 233 to the middle part of the roller body 231. Specifically, the region of the outer circumferential surface of the end cap 233 close to the brush bar unit 232 is taken as a vane forming region, and the vane forming region has three lobe units 233a and three connecting units 233b connecting the lobe units. Each lobe unit 233a is correspondingly arranged on the outer surface (outer surface in the rotation circumferential direction) of the end part of a group of brush bar units 232, and the connecting unit 233b is arranged on the unit of the roller body 231 between the brush bar units 232. In the length direction of the roller body 231, the lobe unit 233a has a side surface extending from the outer edge E1 (the edge farther away from the middle part of the roller body 231) to the inner edge E2 (the edge closer to the middle part of the roller body 231) and extending obliquely toward the side surface of the brush bar unit 232 located below the lobe unit, which is the arc-shaped slope 233a-1, smoothly connected with the arc-shaped brush bar base 232a and synchronously rotating, so that the circular arc surface serves as a vane 233a-1 that guides the airflow from the end part to the middle part. The oblique extension directions of the vane 233a-1 and the brush bar base 232a are both oblique from the end part to the middle part of the roller body 231. Through such a design, the vane 233a-1 can push and guide the air to flow from the extreme left / right end part to the middle part, and the large air volume, high air speed and strong suction force of the middle part of the brush bar can make the hair more easily move to the middle part and quickly enter the air outlet. The vane 233a-1 cooperates with the brush bar base 232a to not only push the hair at the extreme left / right end part to the middle part by the airflow, but also push the hair away from the brush bar 232b, and make the hair actively gather in the air cushion above the tip of the brush bar 232b (the distance from the tip of the brush bar to the surface of the roller body is greater), and be pulled away in the circumferential and axial directions, so that the hair is difficult to wrap around the two sides of the brush bar. The tip of the brush bar 232b is the outermost end in the radial direction of the rotation track of the brush bar 232b. As shown in FIGS. 4-6 and 10, the outer end 241 of the air outlet pipe 24 matches and communicates with the ventilation duct 11, the inner surface of the air outlet pipe 24 completely penetrates the containing cavity 22 in the thickness direction (single-sided penetration) from the outer wall of the containing cavity 22 to the inner wall of the containing cavity 22, and forms an air outlet 242 on the inner wall of the containing cavity 22, which faces and is adjacent to the roller brush assembly 23, and guides the negative pressure to the containing cavity 22, thereby forming a high-speed airflow from the cleaning opening to the air outlet 242.When the air outlet tube 24 penetrates the accommodating cavity 22, if the inner wall of the accommodating cavity 22 corresponding to the penetration position is structured such that one part protrudes towards the roller brush assembly 23 and the other part is relatively recessed, the air outlet 242 is formed after the protruding part is penetrated, that is, the air outlet 242 is formed on the inner surface of the accommodating cavity 22 closest to the roller brush assembly 23, and the air outlet 242 is not blocked by any other structure with the roller brush assembly 23. After the inner surface of the air outlet tube 24 is penetrated, it can be smoothly connected with the inner wall of the accommodating cavity 22, that is, the connection between the air outlet 242 and the inner wall of the accommodating cavity 22 is chamfered to form a gradually expanding horn-shaped transition structure.

[0051] As shown in FIGS. 4-6 and 11, the traction part 25 is arranged in the accommodating cavity 22 and is used to pull the hair away from the roller brush assembly 23. The traction part 25 includes upper and lower rows of traction teeth 251 and 252 arranged along the axial direction of the roller brush assembly 23 and pointing towards the roller brush assembly 23, and the rows of traction teeth 251 and 252 are not staggered with each other in the rotation direction of the roller brush assembly 23.

[0052] As shown in FIGS. 10 and 12-13, in the present embodiment, the penetration direction F1 (dashed arrow in FIG. 10) of the air outlet tube 24 is horizontal, and the orthographic projection of the inner surface of the air outlet tube 24 is circular when the air outlet tube 24 is orthographically projected along the penetration direction F1. The orthographic projection of the edge of the air outlet 242 is also circular. The space region A (corresponding to the cylindrical region between P1 and P2 in FIG. 13) is recorded as the space A from the edge (P1 and P2 in FIG. 10 are the upper and lower edge points) of the air outlet 242 to the surface of the roller body 231 of the roller brush assembly 23 along the penetration direction F1 of the air outlet tube 24 in the accommodating cavity 22. The space B is obtained as the anti-turbulence region B (corresponding to the cylindrical region between P3 and P4 in FIG. 10) by keeping the position of the space A unchanged and proportionally enlarging the cross-sectional area of the space A by 60%, and the traction part 25 is formed outside the anti-turbulence region B. In addition, when the orthographic projection of the edge of the air outlet 242 is not circular but rectangular or other shapes, the cross sections of the space A and the space B are also of corresponding shapes.

[0053] In the present embodiment, the shortest distance (i.e., the vertical distance = the diameter in the height direction) between the lowest point P2 and the highest point P1 of the air outlet 242 is taken as the opening height of the air outlet, and the air outlet is equally divided into lower, middle and upper parts based on the opening height. One row of main traction teeth 251 is formed on the left and right sides of the middle part of the air outlet 242, and one row of auxiliary traction teeth 252 is formed on the left and right sides of the upper part of the air outlet 242. In the present embodiment, the cross-sectional area of each traction tooth gradually increases from the tip to the root in the longitudinal direction (up and down direction). The shape of the main traction tooth 251 is a right triangle in the longitudinal cross section from the tip to the root, and the shape of the auxiliary traction tooth 252 is a trapezoid in the transverse cross section (front and back direction) from the tip to the root.

[0054] Based on the above structure, the specific working process of the dust collector 1000 provided in the present embodiment is as follows:

[0055] The user turns on the vacuum cleaner 1000, and the negative pressure source and the driving motor are turned on. The negative pressure source generates negative pressure, which is transmitted to the brush roll assembly 23 through the air duct 11 and the air outlet pipe 24, and then to the surface to be cleaned through the cleaning opening 221 in the accommodation cavity 22 of the brush roll assembly 23, forming an air suction flow. Here, the surface to be cleaned is taken as an example of the ground, and the dirt is taken as an example of hair.

[0056] At the same time, the driving motor drives the brush roll assembly 23 to rotate at a high speed, and the bristles continuously beat and rub the ground, causing the hair to loosen and separate from the ground and rotate upward from the cleaning opening 221 with the brush roll assembly 23. In this process, the leading end of the hair located in the middle of the brush roll assembly 23 is rotated to the anti-turbulence area B, and the leading end of the hair is pulled by the strong wind force generated by the high-speed and high-flow air flow to the air outlet 242 (cannot be randomly swung), and the subsequent part of the hair is quickly separated from the brush roll assembly 23 and enters the air outlet 242 with the wind, and then enters the air duct 11, and is finally collected by the dust collecting mechanism.

[0057] The hair located at the left and right parts (including the extreme left and right ends) of the brush roll assembly 23 is far away from the air outlet 242, has many obstacles, small air flow, and small wind force, and will swing violently in the wind. In the process of the leading end of the hair being flung upward by the brush roll assembly 23, the leading end of the hair quickly approaches and winds around the main traction tooth 251 (similar to a whip winding around a top), so that the main traction tooth 251 pulls and holds the leading end of the hair. When the leading end of the hair winds around the main traction tooth 251, it also receives the reverse pulling force of the main traction tooth 251, preventing the leading end of the hair from merging with the main body of the hair (the subsequent part of the hair) and winding around the brush roll assembly 23. Further, the main body of the hair is pulled away from the brush roll assembly 23 by the leading end. Since the wind force at the main body of the hair is large, the main body of the hair will first enter the anti-turbulence area and then enter the air outlet with the wind, and then the leading end of the hair will be pulled from the main traction tooth 251 by the large wind force at the air outlet, so that the leading end and the main body of the hair enter the air outlet with the wind and then flow into the dust collecting mechanism.

[0058] For example, in a special case, when the main traction tooth 251 is already wound with hair, causing the remaining hair on the brush roll assembly 23 to have no space to wind around the main traction tooth 251, the remaining hair will be rotated to the auxiliary traction tooth 252 with the brush roll assembly 23, and there will be a chance to wind around the auxiliary traction tooth 252. Then, based on a similar process as the main traction tooth 251, the leading end and the main body of the hair are pulled away from the brush roll assembly 23 and enter the dust collecting mechanism with the wind.

[0059] Meanwhile, during the rotation of the roller brush assembly 23, the arc-shaped slope 233a-1 of the end cover 233 and the brush strip unit 232 and the middle section 232b-2 thereof are arranged such that the end air flow flows upwards and along the outermost ends of the two wings 232b-1 to the V-shaped middle section 232b-2, pushing the hair from the bottom upwards and from the two sides to the middle section, and the hair gathered in the middle section is rotated to the turbulence-preventing area B and then quickly enters the air outlet 242 with strong wind power.

[0060] In the above embodiment, the brush strip has no any gap, and a single brush strip rotates with the roller body for one round, and the friction track with the cleaning surface in the length direction of the roller body is continuous. In order to accelerate the airflow speed and flow in the middle part of the brush strip, so that the middle hair is more quickly sucked away, thereby improving the middle negative pressure and suction, and allowing the middle part to better attract the hair on the two sides, a gap can also be provided on the brush strip, which will be described in detail in the following modification.

[0061] <Modification One>

[0062] In the present modification one, only the structures different from the embodiment are described in detail, the same structures as the embodiment are given the same symbols, and the same description is omitted.

[0063] As shown in FIG. 14, the three groups (pieces) of brush strips are divided into two types 232bI1 and 232bI2, each brush strip itself is continuous and straight without directionality, and all are provided with rectangular gaps. The first type of brush strip 232bI1 is one, and the center (symmetrical center) of the gap 232bI1-2 is located at the center in the length direction of the brush strip 232bI1; the second type of brush strip 232bI2 is two, and the centers of the gaps 232bI2-2 are both deviated from the center (dotted line in the figure) of the brush strip 232bI1 to the left side by a certain distance. In the present modification, the deviation distance is 1.5 times the length of the gap 232bI1-2, and the length of the gap 232bI1-2 is 10 mm.

[0064] As shown in FIG. 15, the three brush strips are installed in the V-shaped opening slots of the three brush strip bases 232a in the upwardly-tightening direction, and are in a spread-eagle shape after installation. Each brush strip 232bI has two wings extending from the left and right ends of the roller body to the middle part, and the distance between the wings gradually tightens in the axial direction of the roller body, and finally forms a tightening opening (corresponding to a gap) 232bII-2. In FIG. 15, the installation mode of the two second brush strips 232bI2 is as follows: the first (uppermost) brush strip 232bI2 is installed in the brush strip base 232a in the direction shown in FIG. 14, and the second (middle) brush strip 232bI2 is installed in the brush strip base 232a in the opposite direction (horizontally rotated 180° in FIG. 14) to the first brush strip 232bI2, so as to form left and right different opening positions of the two tightening openings of the first and second brush strips in FIG. 15 on the roller body 231. The tightening openings of the three brush strips 232bI are staggered with each other in the rotation direction of the roller body 231; the rotation track of the tightening opening of any one brush strip is fully covered by the rotation tracks of the two wings of the other one or two brush strips during each rotation of the roller body 231.

[0065] Through such a structure, the gas flow rate and flow at the tightening opening can be effectively improved, the center hair is quickly sucked away, the high-speed airflow leads to an increase in negative pressure, the two side hairs are more easily attracted, and the anti-winding effect and hair cleaning effect are effectively improved. In addition, the roller brush assembly 23 stably rotates during each rotation period (one complete rotation in the circumferential direction), and there is no any gap. The surface to be cleaned corresponding to the length direction of the roller brush assembly 23 is contacted and cleaned by the brush strip 23, the cleaning track is complete, and the dirt residue is small.

[0066] More preferably, when the first brush strip 232bI1 rotates to face the air outlet, the tightening opening 232bI1-2 faces the air outlet; and when the two second brush strips 232bI2 rotate to face the air outlet, the tightening openings 232bI2-2 are located in the anti-turbulence region B.

[0067] <Variant II>

[0068] In this variant II, only the structures different from the embodiments are described in detail, the same structures as the embodiments are given the same symbols, and the same descriptions are omitted.

[0069] As shown in FIGS. 16 and 17, the three groups of brush strips are the same kind of brush strip 232bII which is completely identical in structure and size, the brush strip 232bII itself is continuous and straight without directionality, and is provided with a rectangular gap. The three brush strips 232bII are respectively inserted into the V-shaped opening slot of the brush strip base 232a, and after installation, they are in the shape of a splay, and have two wings 232bII-1 extending from the left and right ends of the roller body 231 to the middle part, and the axial distance between the two wings is gradually tightened, and finally forms a tightening opening 232bII-2. The center of the tightening opening 232bII-2 deviates from the center of the brush strip 232bII by a certain distance, and in this variant, the length of the tightening opening 232bII-2 is 10 mm, and the tightening opening 232bII-2 extends 10 mm to the left from the center of the brush strip 232bII (the dotted line in FIG. 16).

[0070] The installation mode of the three brush strips 232bII in FIG. 17 is that the first (the uppermost) and the third (the lowermost) brush strips 232bII are inserted into the brush strip base 232a in the direction shown in FIG. 16, and the second (the middle) brush strip 232bII is inserted into the brush strip base 232a in the opposite direction (the left and right are transposed / horizontally rotated by 180° in FIG. 16), so as to form the opening position of the tightening opening of the second brush strip in FIG. 17 which is staggered with respect to the tightening opening of any other brush strip. For example, when inserted, the right side of the first brush strip 232bII advances into the left side of the opening slot, and the center of the tightening opening 232bII-2 deviates to the left, and the left side of the second brush strip 232bII advances into the left side of the opening slot in the transposed direction, so that the center of the tightening opening 232bII-2 deviates to the right, and the third brush strip 232bII is inserted in the same way as the first brush strip 232bII. As viewed in the direction of rotation of the roller body 231, the tightening openings 232bII-2 of the first or third and second brush strips 232bII are symmetrically distributed with respect to the center line of the brush strip 232bII, and the tightening openings 232bII-2 are completely staggered (without any overlap). In this way, the second brush strip 232bII has a rotational trajectory of the tightening opening 232bII-2 which is fully covered by the rotational trajectories of the two wings of the first or third brush strip 232bI every time the roller body 231 rotates one revolution.

[0071] In this way, the same three brush strips 232bII are adopted, the openings are formed at the same position, and only one brush strip 232bII is installed in the opposite direction relative to the other two during threading, so that different tightening openings 232bII-2 positions can be formed on the brush strip base through simple structure and ingenious installation mode, and the three tightening openings 232bII-2 form a smooth center zigzag air path, which can effectively improve the gas flow rate and flow at the tightening opening 232bII-2, so that the center hair is quickly sucked away, and the high-speed airflow causes the negative pressure to increase, which is more likely to attract the hair on both sides, and improves the anti-winding effect and hair cleaning effect; further, each rotation period (one complete rotation in the circumferential direction) of the roller assembly 23 is stable, and the surface to be cleaned corresponding to the length direction of the roller assembly 23 will be contacted and cleaned by the brush strip, and the cleaning track is complete. After threading the brush strip 232bII, slowly rotate the roller body 231 with both hands for one circle, and whether the gap is misaligned can be seen, and the manufacturing, threading, and inspection of the parts are more convenient than the left and right split brush strips 232bII.

[0072] A better solution is that when the three brush strips 232bII are rotated to face the air outlet, the tightening openings 232bII-2 are all located in the anti-turbulence region B.

[0073] The above embodiments and variants are only examples of the technical solutions of the present application. The dust collector and dust collection system involved in the present application are not limited to the contents described in the above embodiments, but are subject to the scope defined in the claims. Any modification or supplement or equivalent replacement made by a person skilled in the art on the basis of the above embodiments is within the scope claimed by the claims of the present application.

[0074] For example, in the present application, the brush strip can also adopt a structure without brush filaments such as a rubber strip or a plastic strip. In this case, the two wings of the m-shaped or V-shaped brush strip do not have brush filaments, but are formed by a rubber / plastic strip. In addition, the above embodiments and variants are all described by taking three brush strip units / brush strips as examples, and the shapes of the three groups are basically similar, but the number of brush strip units / brush strips in the present application is not limited to this. For example, fewer or more brush strip units / brush strips can be used. In addition, the present application can also use other different shapes of brush strip units / brush strips formed on the roller body, and the brush strip units / brush strips can not be continuously extended from the left end to the right end of the roller body, but some brush strip units / brush strips are only formed on the left side of the roller body, some are only formed on the right side, or some are only formed in the middle of the roller body. Moreover, these brush strips can all be brush filament structures, or all be brush filament-free structures, or both brush filament structures and brush filament-free structures can exist.

Claims

1. A floor brush, connected to the ventilation duct of a vacuum cleaner, utilizes the negative pressure of the vacuum cleaner to generate suction airflow to clean dirt from the surface to be cleaned, characterized in that... include: The main body of the floor brush; A receiving cavity, located inside the floor brush body, is used to house the roller brush assembly, and has a cleaning opening at the bottom facing the surface to be cleaned; The air outlet duct is connected to the ventilation duct at its outer end. The air outlet duct passes through the receiving cavity from the outside to the inside and forms an air outlet on the inner wall of the receiving cavity that faces the roller brush assembly and is adjacent to the roller brush assembly. The negative pressure is directed to the receiving cavity, thereby forming a high-speed airflow from the cleaning opening to the air outlet. A traction unit, disposed in the receiving cavity, for pulling hair away from the roller brush assembly, includes at least one row of traction teeth spaced apart along the axial direction of the roller brush assembly and with the tooth tips pointing towards the roller brush assembly. The space region extending from the edge of the air outlet along the through direction of the air outlet pipe to the roller surface of the roller brush assembly in the receiving cavity is denoted as space A. Keeping the position of space A unchanged, its cross-sectional area is enlarged by at least 50% to obtain space B as the anti-turbulence area. The traction part is formed outside the anti-turbulence area, and the traction teeth are formed on both the left and right sides of the air outlet.

2. The floor brush according to claim 1, characterized in that: in, The traction unit includes: at least one row of main traction teeth formed on the left and right sides of the air outlet, and multiple rows of auxiliary traction teeth formed at a certain distance from the main traction teeth along the rotation direction of the roller brush assembly. The traction teeth in each row do not intersect.

3. The floor brush according to claim 2, characterized in that: in, The shortest distance between the lowest and highest points of the air outlet is taken as the opening height of the air outlet. Based on the opening height, the air outlet is divided into a lower part, a middle part, and an upper part from top to bottom. The main traction teeth are formed on the left and right sides of the middle part of the air outlet.

4. The floor brush according to claim 1, characterized in that: in, The cross-sectional area of ​​space B is 60% larger than that of space A.

5. The floor brush according to claim 1, characterized in that, Also includes: A roller brush assembly, detachably mounted in the receiving cavity, includes a rotatable roller and multiple sets of brush strips mounted on the roller; The brush bar is configured to be V-shaped when viewed in the direction of rotation of the roller brush assembly, having two wings extending from the left and right ends of the roller body towards the middle and the distance between them gradually narrowing upward along the roller body axis, and a middle section connecting the two wings; the thickness or density of the bristles of the two wings is not less than twice that of the middle section.

6. The floor brush according to claim 1, characterized in that, Also includes: A roller brush assembly, detachably mounted in the receiving cavity, includes a rotatable roller and at least two sets of brush strip units mounted on the roller; The brush bar unit is shaped like the number eight and has two wings that extend from the left and right ends of the roller towards the middle and gradually narrow in the axial direction of the roller to form a tightening opening. Along the rotation direction of the roller, the tightening openings of at least one set of brush bar units are staggered with the tightening openings of other brush bar units. Every time the roller rotates, the rotation trajectory of the tightening opening of any set of brush bar units is completely covered by the rotation trajectory of the wings of the other brush bar units.

7. The floor brush according to claim 6, characterized in that: in, The center of the tightening port of at least one group of the brush strip units is offset from the center of the brush strip along its length by a certain distance, and the rotation trajectory of the tightening port passes through the anti-turbulence area.

8. The floor brush according to claim 6, characterized in that: in, The center of the tightening opening of at least one set of the brush strip units is located at the center of the brush strip length direction, and the rotation trajectory of the tightening opening passes through the space A.

9. The floor brush according to claim 1, characterized in that, Also includes: The roller brush assembly is detachably installed in the receiving cavity and includes: a rotatable roller, multiple sets of brush strip units protruding from the surface of the roller, and two end caps located at both ends of the roller and rotating synchronously with the roller; The brush strip unit extends arcuately on the surface of the roller, and the end cap is provided with an arcuate inclined surface. At least one of the windward sides of the brush strip unit is smoothly connected to one of the arcuate inclined surfaces, together forming a guide fan blade that guides the flow from the end cap to the center of the roller.

10. A vacuum cleaner, characterized in that, include: The vacuum cleaner body has a negative pressure source that generates negative pressure and a ventilation duct that transmits negative pressure outward. A floor brush, which is matched and connected to the ventilation duct, uses the negative pressure to generate airflow to clean the dirt on the surface to be cleaned; The floor brush is the floor brush described in any one of claims 1 to 9.

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