Floor brush and dust collector

Abstract

The utility model belongs to the field of dust collectors, and particularly provides a floor brush and a dust collector which can practically prevent hair from winding a rolling brush assembly. The floor brush comprises a floor brush main body; the accommodating cavity accommodates the rolling brush assembly and is provided with a cleaning opening at the bottom; the air outlet pipe penetrates through the containing cavity from outside to inside, an air outlet which faces the rolling brush assembly and is adjacent to the rolling brush assembly is formed in the inner wall of the containing cavity, and negative pressure is guided to the containing cavity; the traction part is arranged in the accommodating cavity, is used for pulling the hair to be separated from the rolling brush assembly and comprises at least one row of traction teeth which are arranged at intervals in the axial direction of the rolling brush assembly, and tooth tips point to the rolling brush assembly; a space area, extending from the edge of the air outlet to the surface of a rolling body of the rolling brush assembly in the penetrating direction of the air outlet pipe, in the containing cavity is marked 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, a space B is obtained and serves as an anti-turbulent-flow area, and the traction part is formed outside the anti-turbulent-flow area. And traction teeth are formed on the left and right sides of the air outlet.

Description

Technical Field

[0001] The utility model belongs to the field of floor brushes, and in particular relates to a floor brush and a vacuum cleaner. Background Art

[0002] In a vacuum cleaner, the electric fan rotates at high speed to generate negative pressure, thereby forming a high-speed airflow from outside to inside, and the dust, hair and other dirt on the surface to be cleaned near the floor brush are transported to the dust collection bucket of the vacuum cleaner through the high-speed airflow. In order to collect dirt more effectively, a rotating roller brush is usually set in the floor brush. The roller brush contacts the surface to be cleaned through the opening of the floor brush. During the rotation of the roller brush, the brush bar continuously beats and rubs the surface to be cleaned, causing the dirt to loosen and detach from the surface to be cleaned, so that the dirt can be more easily transported into the vacuum cleaner by the airflow.

[0003] When there are a lot of long hairs on the surface to be cleaned, the hairs are easy to entangle with the roller brush, and the entanglement becomes tighter and tighter, and then the hairs catch dust particles or other hairs, causing the dirt to accumulate and entangle on the surface of the roller brush and cannot be sucked into the vacuum cleaner, and the cleaning effect becomes worse. When severe entanglement occurs, the roller brush may not even rotate. For this reason, users need to pay special attention to the hair entanglement, and manually clean it instead of sucking the hair and other dirt on the roller brush into the vacuum cleaner, which brings extra burden to users.

[0004] In order to solve the problem of hair entangled in the roller brush, the prior art CN2021101452788 proposes a floor brush, a hair removal tooth assembly and a movable device, wherein a first hair removal tooth group and a second hair removal tooth group are arranged in the roller brush chamber, the first hair removal tooth group is located approximately in the middle of the air outlet of the suction air duct, the first hair removal tooth is away from one end of the first bracket plate, and extends from the top of the roller brush chamber to the area between the roller brush and the air outlet of the suction air duct, which can comb the hair and other dirt off the roller brush, and the multiple first hair removal teeth and the multiple second hair removal teeth are staggered to comb the hair and other dirt on the roller brush. However, such a design causes nearly half of the air outlet to be blocked by the first hair removal tooth group, the air flow at the air outlet is greatly reduced, the air resistance is greatly increased, the air outlet area is reduced, the probability of dirt entering the air outlet is reduced, the cleaning efficiency is reduced, and the corresponding diversion on both sides of the roller brush chamber is lower, especially the air flow at the extreme left and extreme right sides near the two ends of the roller brush is the lowest, and the hair is more likely to be entangled with the roller brush rather than being brought into the air outlet by the air flow. Moreover, the staggered arrangement of the first hair removal teeth and the second hair removal teeth will cause greater turbulence in the roller brush cavity, chaotic airflow, and the tips of the hairs will swing around randomly, being blocked in front and more likely to swing back and entangle the roller brush. Utility Model Content

[0005] The utility model is developed to solve the above-mentioned problem, and aims to provide a floor brush and a vacuum cleaner, which can effectively prevent hair from being entangled in the roller brush and improve the cleaning efficiency.

[0006] In order to achieve the above purpose, the utility model adopts the following scheme:

[0007] <Floor Brush>

[0008] The utility model provides a floor brush, which is matched and connected with the ventilation duct of the vacuum cleaner, and uses the negative pressure of the vacuum cleaner to generate an inhaled airflow to clean the dirt on the surface to be cleaned, comprising: a floor brush body; a receiving cavity, which is located in the floor brush body and is used to receive a roller brush assembly, and has a cleaning opening facing the surface to be cleaned at the bottom; an air outlet pipe, the outer end of which is matched and connected with the ventilation duct, the air outlet pipe penetrates the receiving cavity from the outside to the inside and forms an air outlet facing the roller brush assembly and adjacent to the roller brush assembly on the inner wall of the receiving cavity, so as to guide the negative pressure to the receiving cavity, thereby forming a high pressure from the cleaning opening to the air outlet A traction portion is arranged in the accommodating chamber and is used to pull hair away from the roller brush assembly, comprising: at least one row of traction teeth arranged at intervals along the axial direction of the roller brush assembly and with tooth tips pointing to the roller brush assembly; wherein, a spatial area in the accommodating chamber extending from the edge of the air outlet along the penetrating direction of the air outlet pipe to the roller surface of the roller brush assembly is recorded as space A, the position of space A is kept unchanged, and its cross-sectional area is proportionally enlarged by at least 50% to obtain space B as the anti-turbulence area, the traction portion is formed outside the anti-turbulence area, and traction teeth are formed on both the left and right sides of the air outlet.

[0009] The beneficial effects of the above scheme are as follows: the anti-turbine flow area corresponds to the air outlet, where the suction force and airflow speed are the largest. No blocking structure is set in this area, so that the airflow volume in the anti-turbine flow area is maximized, so that the hair tips will not swing around in this area, but will be pulled toward the air outlet by the strong wind force generated by the high-speed, large-flow airflow, and drive the subsequent parts of the hair to quickly break away from the roller brush assembly and enter the air outlet with the wind. At the same time, since the airflow volume in the anti-turbine flow area is greatly increased, the airflow component on the left and right sides of the anti-turbine flow area in the accommodating cavity is also increased accordingly, and the wind force on the hair in the two sides, especially the extreme left and extreme right areas, towards the air outlet is also greatly enhanced. Taking the hair in the extreme left / right area with the smallest airflow and the smallest wind force as an example, when the tip of the hair is picked up from the cleaning opening by the high-speed rotating roller brush assembly and swung upward, the tip of the hair can quickly move close to the traction part and entangle the main traction teeth (similar to a whip entangled in a gyroscope), and the tip of the hair is pulled by the main traction teeth. In this way, on the one hand, the tip of the hair is subjected to the reverse pulling force of the traction teeth, so that it cannot swing around to merge with its subsequent part and then entangle the roller body; on the other hand, the subsequent part of the hair (referred to as: the hair body) will be pulled away from the roller brush assembly by the tip as the roller brush assembly rotates, and will be subjected to the wind force of the airflow to move toward the air outlet. Since the airflow is greatly obstructed at the main traction teeth, the wind force received by the tip is less than that received by the hair body. Under the action of the wind force, the hair body drives the tip to untangle and leave the main traction teeth (the wind force pulls the hair to dissolve from the traction teeth), and then enters the air outlet with the wind. Therefore, the utility model can smoothly separate the hair in any area of ​​the accommodating cavity, including the extreme left and extreme right areas, from the roller brush assembly and allow the hair to enter the air outlet, thereby effectively avoiding the problem of hair entanglement.

[0010] Preferably, in the floor brush provided by the utility model, the traction part 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 outlet traction teeth along the rotation direction of the roller brush assembly; the rows of traction teeth are not staggered. The rows of traction teeth (main and auxiliary) are aligned rather than staggered, which can reduce turbulence and maintain the hair capture ability. The hair that is not entangled with the main traction teeth has a chance to entangle with the auxiliary traction teeth, which improves the traction efficiency, and effectively avoids the obstruction and disturbance of the airflow caused by the staggered traction teeth, improves the stability, directionality and airflow volume of the airflow in the accommodating cavity, and further improves the hair cleaning effect.

[0011] Preferably, in the floor brush provided by the utility model, the shortest distance between the lowest point and the highest point of the air outlet is used as the opening height of the air outlet, and the air outlet is divided into three equal parts: the lower part, the middle part, and the upper part 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-disturbance effect and the cleaning effect are better.

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

[0013] Preferably, the floor brush provided by the utility model further includes: a roller brush assembly, which is detachably installed in the accommodating cavity, including a rotatable roller body and a plurality of brush strips installed on the roller body; wherein the brush strip is configured to be V-shaped in the direction of rotation of the roller brush assembly, with two wings extending from the left and right ends of the roller body to the middle part and with a gradually tightened spacing, and a middle section connecting the two wings; the brush wire thickness or density of the two wings is not less than twice that of the middle section. During the rotation of the brush strip, the outermost ends of the two wings first contact the hair and other dirt on the surface to be cleaned, the two wings have a large density and are not easy to be ventilated, and the wind (high-speed airflow) is more likely to flow along the outermost ends of the two wings to the V-shaped middle section, thereby pushing the hair from both sides to the middle section, the middle section has a small density, small resistance, is closer to the air outlet, and is more ventilated, so that the hair gathered in the middle section is more likely to leave the middle section with the wind and quickly fly into the air outlet.

[0014] Preferably, the floor brush provided by the utility model also includes: a roller brush assembly, which is detachably installed in the accommodating cavity, including a rotatable roller and at least two groups of brush strip units installed on the roller; wherein the brush strip unit is in an eight-shaped shape, having two wings extending from the left and right ends of the roller to the middle and the spacing in the axial direction of the roller gradually tightens to finally form a tightening opening; and along the rotation direction of the roller, the tightening openings of at least one group of brush strip units are staggered with the tightening openings of other brush strip units when viewed along the rotation direction of the roller; for every rotation of the roller, the rotation trajectory of the tightening openings of any group of brush strip units is fully covered by the rotation trajectory of the two wings of another group or multiple groups of brush strip units. Through such a structural setting, on the one hand, each rotation cycle of the roller brush assembly (one full circle in the circumferential direction) is stable without any gaps, and the surface to be cleaned corresponding to the length direction of the roller brush assembly will contact the brush strip unit and be cleaned by the brush strip unit, so that the cleaning track is complete and less dirt remains; on the other hand, the air flow rate at the tightening port is fast, so that the central hair is sucked away quickly, and the high-speed airflow causes negative pressure, attracting the hair on both sides, making it easier for hair and other dirt to reach the middle section / tightening port from both ends of the brush strip unit, and easier to enter the air outlet from the tightening port with the air flow.

[0015] Furthermore, in the floor brush provided by the utility model, the center of the tightening opening of at least one group of the brush strip units deviates from the center of the brush strip length direction by a certain distance, and the rotation trajectory of the tightening opening passes through the anti-turbulence area. In this way, hair and other dirt can more easily reach the middle section / tightening opening from both ends of the brush strip unit, and can more easily enter the air outlet from the tightening opening along with the airflow.

[0016] Furthermore, in the floor brush provided by the utility model, the center of the tightening opening of at least one group of the brush strip units is located at the center of the length direction of the brush strip, and the rotation trajectory of the tightening opening passes through the space A. In this way, hair and other dirt can more easily reach the middle section / tightening opening from both ends of the brush strip unit, and can more easily enter the air outlet from the tightening opening along with the airflow.

[0017] Preferably, the floor brush provided by the utility model also includes: a roller brush assembly, which is detachably installed in the accommodating cavity, including a rotatable roller and at least three groups of brush strip units installed on the roller; wherein each group of brush strip units includes a brush strip and a brush strip base on which the brush strip is interspersed and installed; after the brush strip is interspersed and installed on the brush strip base, it is in an eight-shaped shape, with two wings extending from the left and right ends of the roller to the middle and the spacing in the axial direction of the roller gradually tightens to finally form a tightening opening; the center of the tightening opening deviates from the center in the length direction of the brush strip by a certain distance; at least three groups of brush strip units are formed by using the same brush strip for installation, and the tightening openings of the two groups of brush strips are completely staggered when viewed along the rotation direction of the roller by installing the brush strip of at least one brush strip unit in the opposite direction of the brush strip in any other brush strip unit. Through such a structural arrangement, on the one hand, each rotation cycle of the roller brush assembly (one full circle in the circumferential direction) is stable without any gaps, and the surfaces to be cleaned corresponding to the length direction of the roller brush assembly will contact the brush strips and be cleaned by the brush strips, so that the cleaning track is complete and less dirt remains; on the other hand, the air flow rate at the tightening opening is fast, so that the central hair is sucked away quickly, and the high-speed airflow causes negative pressure, which attracts the hair on both sides, making it easier for hair and other dirt to reach the middle section / tightening opening from both ends of the brush strip, and easier to enter the air outlet from the tightening opening with the air flow; in addition, the same brush strips can be installed from the left and right ends of the roller respectively, or the brush strips can be reversed to form mutually staggered tightening openings, which makes parts manufacturing, interlacing, and inspection more convenient.

[0018] Preferably, the floor brush provided by the utility model also includes: a roller brush assembly, which is detachably installed in the accommodating cavity, including a rotatable roller and three groups of brush strip units installed on the roller; wherein each group of brush strip units includes a brush strip and a brush strip base on which the brush strip is interlaced and installed; after the brush strip is interlaced and installed on the brush strip base, it is in an eight-shaped shape, and has two wings extending from the left and right ends of the roller to the middle and the spacing in the axial direction of the roller is gradually tightened to finally form a tightening opening; the three groups of brush strip units are formed by installing two types of brush strips, the tightening opening of the first type of brush strip is located at the center in the length direction of the brush strip, and the tightening opening of the second type of brush strip deviates from the center to one side by a certain distance; the roller has a group of the first type of brush strips, and has two groups of the second type of brush strips, one group of the second type of brush strips is installed in the opposite direction relative to the other group of the second type of brush strips, and the tightening openings of the three groups of brush strips are staggered along the rotation direction of the roller; for every rotation of the roller, the rotation trajectory of the tightening opening of any group of brush strips is fully covered by the rotation trajectory of the two wings of another group or more groups of brush strips. Through such a structural arrangement, on the one hand, each rotation cycle of the roller brush assembly (one full circle in the circumferential direction) can be stably rotated without any gaps, and the surfaces to be cleaned corresponding to the length direction of the roller brush assembly will contact the brush bar and be cleaned by the brush bar, so that the cleaning track is complete and less dirt remains; on the other hand, the air flow rate at the tightening mouth is fast, so that the hair at the tightening mouth is sucked away quickly, and the high-speed airflow causes negative pressure, which attracts the hair on both sides, making it easier for hair and other dirt to reach the middle section / tightening mouth from both ends of the brush bar, and easier to enter the air outlet from the tightening mouth with the air flow.

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

[0020] Preferably, the floor brush provided by the utility model also includes: a roller brush assembly, which is detachably installed in the accommodating cavity, including: a rotatable roller, a plurality of brush strip units protruding from the surface of the roller, and two end covers located at both ends of the roller and rotating synchronously with the roller; wherein the brush strip units extend in an arc shape on the surface of the roller, and an arc-shaped inclined surface is provided on the end cover, and the windward side surface of at least one brush strip unit is smoothly connected to an arc-shaped inclined surface, together forming a guide blade that guides the flow from the end cover to the middle of the roller.

[0021] <Vacuum cleaner>

[0022] Furthermore, the utility model also provides a vacuum cleaner, comprising: a vacuum cleaner body, having a negative pressure source for generating negative pressure and a ventilation duct for transmitting the negative pressure to the outside; a floor brush, which is matched and connected with the ventilation duct, and uses the negative pressure to generate an inhaled airflow to clean the dirt on the surface to be cleaned; wherein the floor brush is the floor brush described in the above <Vacuum cleaner>. Based on the same improved technology, the floor brush has the same beneficial effects as <Floor brush>. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of a vacuum cleaner involved in an embodiment of the utility model;

[0024] Figure 2 The structure of the floor brush according to the embodiment of the utility model is shown in FIG. Figure 1 ;

[0025] Figure 3 The structure of the floor brush according to the embodiment of the utility model is shown in FIG. Figure 2 ;

[0026] Figure 4 The internal structure of the floor brush of the present utility model embodiment after removing the roller brush assembly is schematically shown. Figure 1 ;

[0027] Figure 5 The internal structure of the floor brush of the present utility model embodiment after removing the roller brush assembly is schematically shown. Figure 2 ;

[0028] Figure 6 The internal structure of the floor brush of the present utility model embodiment after removing the roller brush assembly is schematically shown. Figure 3 ;

[0029] Figure 7 It is a structural schematic diagram of a roller brush assembly involved in an embodiment of the utility model;

[0030] Figure 8 This is an exploded view of the roller brush assembly involved in the embodiment of the utility model;

[0031] Fig. 9 It is a partial enlarged view of the end of the roller brush assembly involved in the embodiment of the utility model, wherein (a) is a stereoscopic view and (b) is a front view;

[0032] Fig.10 This is a structural cross-sectional view of the floor brush involved in the embodiment of the utility model after removing the roller brush assembly and part of the shell;

[0033] Fig.11 It is a structural schematic diagram of a traction part involved in an embodiment of the utility model;

[0034] Fig.12It is a partial structural front view of the floor brush involved in the embodiment of the utility model after removing the roller brush assembly and most of the shell;

[0035] Fig.13 A schematic diagram of the positional relationship between the roller and the spaces A and B involved in the embodiment of the utility model;

[0036] Fig.14 This is a simplified diagram of the structure of the brush strip involved in this first variation.

[0037] Fig.15 This is a schematic diagram of the structure of the brush strip involved in the first modification after being inserted and installed on the brush strip base;

[0038] Fig.16 This is a simplified structural diagram of the brush strip involved in the second modification;

[0039] Fig.17 This is a schematic diagram of the structure of the brush strip base and the brush strip involved in the second variation. DETAILED DESCRIPTION

[0040] The specific implementation scheme of the floor brush and the vacuum cleaner involved in the utility model is described in detail below with reference to the accompanying drawings.

[0041] <Example>

[0042] like Figure 1 As shown, the vacuum cleaner 1000 includes a vacuum cleaner body 10 and a floor brush 20. In this embodiment, the vacuum cleaner 1000 is a cordless vacuum cleaner that can use negative pressure to absorb dirt such as dust, hair, etc. on the surface to be cleaned.

[0043] The vacuum cleaner body 10 has a negative pressure source, a ventilation duct 11 and a dust collecting mechanism. The negative pressure source can generate negative pressure, the ventilation duct 11 transmits the negative pressure outward to the surface to be cleaned, and the dust collecting mechanism is used to collect dirt entering through the ventilation duct 11.

[0044] The floor brush 20 is connected to the ventilation duct 11 directly or indirectly through an extension tube, and uses negative pressure to generate an inhaled airflow to clean the dirt on the surface to be cleaned. Figures 3 to 5 As shown, the floor brush 20 includes a floor brush body 21 , a accommodating cavity 22 , a roller brush assembly 23 , an air outlet pipe 24 , and a traction portion 25 .

[0045] The floor brush body 21 includes a housing 211 and a driving unit (not shown). The driving unit is arranged in the housing 211 and is connected to the roller brush assembly 23, including a driving motor that drives the roller brush assembly 23 to rotate at high speed around the length direction (axial direction) and a belt connecting the driving motor and the roller brush assembly 23.

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

[0047] like Figure 3 and 7 As shown, the roller brush assembly 23 is detachably installed in the accommodating cavity 22 , and its length direction is the same as that of the accommodating cavity 22 and the cleaning opening 221 . It includes a roller body 231 , three groups of brush strip units 232 , and two end covers 233 .

[0048] The roller 231 is connected to the driving motor through a belt and can rotate at high speed around the axial direction, and the speed is generally 2000-3000r / min.

[0049] like Figures 7-8As shown, three groups of brush bar units 232 are evenly installed on the surface of the roller 231 along the circumferential direction, in a V shape, and rotate synchronously with the roller 231. Adjacent brush bar units 232 are spaced 120 degrees apart. Each group of brush bar units 232 includes a brush bar base 232a and a brush bar 232b. The brush bar base 232a protrudes and is fixed on the surface of the roller 231. The brush bar base 232a is provided with an open groove extending continuously from the left end to the right end of the roller; since the brush bar base 232a protrudes from the surface of the roller 231, the brush bar base 232a itself also forms a guide structure that pushes air to the tip of the brush bar. The brush strip can be a strip structure with brush filaments planted on it, or it can be a strip or sheet structure without brush filaments but a rubber / plastic strip or the like; in this embodiment, the brush strip 232b is an example of a strip structure with brush filaments planted on it, and the brush strip 232b is a long straight strip, which has no directionality, and the brush filaments are arranged along the length direction, and the brush filaments are arranged in the middle but the density is low, and the brush strip 232b is inserted and installed in the V-shaped opening groove of the brush strip base 232a, and the shape after installation is consistent with the shape of the opening groove, and the left and right ends of the brush strip 232b only extend to the inner surface of the two end caps 233. In this embodiment, after the brush strip 232b is installed, it is V-shaped along the rotation direction of the roller brush assembly 23, and has 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 231 to the middle, and the spacing in the axial direction of the roller 231 gradually tightens. The middle section 232b-2 is used to connect the two wings 232b-1, and its length is not less than 1 / 5 of the length of the air outlet; the thickness or density of the brush filaments 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 larger and faster than that of the two wings 232b-1, and the wind force / suction force is stronger. The extension line of a single brush filament in the brush strip unit 232 does not intersect with the axis of the roller 231. In this embodiment, the thickness of the two wings 232b-1 is about 5mm. In addition, the middle section 232b-2 is located in the middle of the brush strip unit 232, and the middle of the brush strip unit 232 corresponds to the air outlet 242. The brush bar unit 232 extends in an arc shape on the surface of the roller 231 along the axial direction of the roller 231, and the brush bar base 232a also extends in an arc shape on the surface of the roller 231. The brush bar base 232a has two side surfaces when viewed in the circumferential direction, and both of these side surfaces extend in an arc shape along the axial direction of the roller 231. In the process of the brush bar base 232a rotating from the cleaning opening 221 to the air outlet 242, one side surface is the windward side, which is first rotated to face the air outlet 242, and the other side surface is the leeward side located on the back of the brush bar 232b, and is finally rotated to be close to the air outlet 242.

[0050] The two end covers 233 are respectively located at both ends of the roller 231 and rotate synchronously with the roller 231, and cover the brush bar base 232a of the brush bar unit 232 to close the open groove of the brush bar base 232a. Fig. 9As shown, each end cover 233 is provided with an arc-shaped inclined surface 233a-1, and the windward side of at least one brush strip unit 232 is smoothly connected to an arc-shaped inclined surface 233a-1, together forming a guide blade that guides the flow from the end cover 232 to the middle of the roller 231. Specifically, the area on the outer peripheral surface of the end cover 233 close to the brush strip unit 232 is used as a blade forming area, and the blade forming area has three convex leaf units 233a and three connecting units 233b connecting the convex leaf units. Each convex leaf unit 233a is correspondingly arranged on the outer surface (the outer surface in the rotation circumferential direction) of the end of a group of brush strip units 232, and the connecting unit 233b is arranged on the roller 231 unit located between the brush strip units 232. In the length direction of the roller 231, the convex leaf unit 233a has a side extending from the outer edge E1 (the edge farther from the middle of the roller 231) to the inner edge E2 (the edge closer to the middle of the roller) and extending obliquely toward the side of the brush strip unit 232 located below the convex leaf unit and gradually approaching, and the side is an arc-shaped inclined surface 233a-1, which is smoothly connected to the brush strip base 232a in an arc shape and rotates synchronously, so that the arc surface serves as a fan blade 233a-1 that guides air from the end to the middle; the inclined extension direction of the fan blade 233a-1 and the brush strip base 232a is inclined from the end to the middle of the roller 231. Through such a design, the fan blade 233a-1 can push and guide the air to flow from the extreme left / right end to the middle, and the large air volume, high wind speed and strong suction in the middle of the brush strip make it easier for hair to move to the middle and quickly enter the air outlet. The fan blade 233a-1 cooperates with the brush bar base 232a to not only push the hair on the extreme left / right side to the middle by the airflow, but also push the hair away from the brush bar 232b, and actively gather the hair in the air cushion that is higher than the tip of the brush bar 232b (greater than the distance from the tip of the brush bar to the roller surface), so that the hair is pulled away in both the circumferential and axial directions, and it is difficult for the hair to wrap around the brush wires on both sides and connect end to end. The tip of the brush bar 232b is the outermost end of the brush bar 232b's rotation trajectory in the radial direction. Figures 4 to 6As shown in FIG. 10 , the outer end 241 of the air outlet pipe 24 is matched and connected with the ventilation duct 11, and the inner surface of the air outlet pipe 24 completely penetrates the accommodating chamber 22 in the thickness direction from the outer wall of the accommodating chamber 22 to the inner wall of the accommodating chamber 22, and forms an air outlet 242 on the inner wall of the accommodating chamber 22 facing the roller brush assembly 23 and adjacent to the roller brush assembly 23, directing the negative pressure to the accommodating chamber 22, thereby forming a high-speed airflow from the cleaning opening to the air outlet 242. With regard to the air outlet pipe 24 penetrating the accommodating chamber 22, if the inner wall of the accommodating chamber 22 corresponding to the penetration point is a structure in which a part of the accommodating chamber 22 protrudes toward the roller brush assembly 23 and the other part is relatively concave, then the air outlet 242 is formed after penetrating the protruding part, that is, the air outlet 242 is formed on the inner surface of the accommodating chamber 22 closest to the roller brush assembly 23, and there is no other structural obstruction between the air outlet 242 and the roller brush assembly 23. The inner surface of the air outlet pipe 24 can be smoothly connected to the inner wall of the accommodating chamber 22 after being penetrated, that is, the connection between the air outlet 242 and the inner wall of the accommodating chamber 22 is rounded to form a trumpet-shaped transition structure that gradually expands outward.

[0051] like Figures 4 to 6 As shown in FIG. 11 , the traction portion 25 is disposed in the accommodating cavity 22, and is used to pull the hair away from the roller brush assembly 23. The traction portion 25 includes upper and lower rows of traction teeth 251 and 252 which are arranged at intervals along the axial direction of the roller brush assembly 23 and whose tooth tips point to the roller brush assembly 23, and the rows of traction teeth 251 and 252 are not staggered with each other when viewed in the rotation direction of the roller brush assembly 23.

[0052] like Fig.10 and 12 As shown in Fig. 13, the through direction F1 ( Fig.10 The dotted arrow in the middle is horizontal. When the orthographic projection is performed along the penetration direction, the orthographic projection of the inner surface of the air outlet 244 is a circle, and the orthographic projection of the edge of the air outlet 242 is also a circle. Fig.10 P1 and P2 are upper and lower edge points), and the space area extending along the penetration direction F1 of the air outlet pipe 244 to the surface of the roller 231 of the roller brush assembly 23 is recorded as space A (corresponding to Fig.13 The cylindrical area between P1 and P2 in the middle), keeping the position of space A unchanged, the cross-sectional area is proportionally enlarged by 60% to obtain space B as the anti-disturbance area B (corresponding to Fig.10 The traction portion 25 is formed outside the anti-turbulence area B. In addition, when the orthographic projection of the edge of the air outlet 242 is not a circle but other shapes such as a rectangle, the cross-sections of the space A and the space B are also corresponding shapes.

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

[0054] Based on the above structure, the specific working process of the vacuum cleaner 1000 provided in this embodiment is as follows:

[0055] When the user turns on the vacuum cleaner 1000, the negative pressure source and the driving motor are turned on, the negative pressure source generates negative pressure, and the ventilation duct 11 and the air outlet pipe 24 transmit the negative pressure to the accommodating chamber 22 of the floor brush 20, and then transmit the negative pressure to the surface to be cleaned through the cleaning opening 221 of the accommodating chamber 22, forming an inhaled airflow. Here, the surface to be cleaned is the ground and the dirt is hair.

[0056] At the same time, the driving motor drives the roller brush assembly 23 to rotate at a high speed, and the brush strips continuously beat and rub the ground, causing the hair to loosen from the ground and rotate upward from the cleaning opening 221 along with the roller brush assembly 23. In this process, the hair tip located in the middle of the roller brush assembly 23 is rotated to the anti-turbulence area B, and the hair tip is pulled toward the air outlet 242 (cannot swing randomly) by the strong wind force generated by the high-speed and large-volume airflow, and drives the subsequent part of the hair to quickly detach from the roller brush assembly 23, enter the air outlet 242 with the wind, and then enter the ventilation duct 11, and finally be collected by the dust collection mechanism.

[0057] The hair located on the left and right parts (including the extreme left and right ends) of the roller brush assembly 23 will sway violently in the wind because they are far away from the air outlet 242, have many obstacles, small air flow, and small wind force. When the hair tip is thrown upward by the roller brush assembly 23, it quickly approaches and wraps around the main traction teeth 251 (similar to a whip wrapping around a gyroscope), so that the main traction teeth 251 pull and hold the hair tip. When the hair tip is wrapped around the main traction teeth 251, it is also reversely pulled by the main traction teeth 251. The pulling force prevents the tip of the hair from merging with the main body of the hair (the subsequent part of the hair) and then entangled with the roller brush assembly 23. As the roller brush assembly 23 rotates, the main body of the hair is pulled away from the roller brush assembly 23 by the tip. Since the wind force is strong at the main body of the hair, it will first enter the anti-turbulence area and then enter the air outlet with the wind. Then, the strong wind force at the air outlet will pull the tip of the hair to be released from the main traction teeth 251, so that the tip and the main body of the hair are both blown into the dust collection mechanism.

[0058] For example, when hair is already entangled on the main traction teeth 251, resulting in the remaining hair on the roller brush assembly 23 having no place to be entangled with the main traction teeth 251, the remaining hair tips will be rotated to the auxiliary traction teeth 252 along with the roller brush assembly 23, and there is always a chance that they will be entangled with the auxiliary traction teeth 252. Then, based on a process similar to that of the main traction teeth 251, the hair tips and the main body are pulled away from the roller brush assembly 23 and enter the dust collection mechanism with the wind.

[0059] At the same time, during the rotation of the roller brush assembly 23, the arrangement of the arc-shaped inclined surface 233a-1 of the end cover 233 and the brush strip unit 232 and its middle section 232b-2 enables the end airflow to flow upward and along the outermost ends of the two wings 232b-1 to the V-shaped middle section 232b-2, pushing the hair from bottom to top and from both sides to the middle section. The hair gathered in the middle section is rotated to the anti-turbulence area B and then quickly enters the air outlet 242 with the strong wind.

[0060] In the above embodiments, the brush strip has no gaps, and a single brush strip rotates with the roller for one circle, and the friction track with the cleaning surface is continuous in the length direction of the roller. In order to increase the air flow velocity and flow rate in the middle of the brush strip, so that the hair in the middle is sucked away more quickly, thereby increasing the negative pressure and suction force in the middle, so that the middle can better attract the hair on both sides, a gap can also be opened on the brush strip, as detailed in the following modified examples.

[0061] <Modification 1>

[0062] In this first variation, only the structures that are different from the embodiment are described in detail, and the same symbols are given to the structures that are the same as the embodiment, and the same descriptions are omitted.

[0063] like Fig.14 As shown, the three groups (individuals) of brush strips are divided into two types 232bI1 and 232bI2. Each brush strip is continuous and straight, has no directionality, and has a rectangular gap. The first type of brush strip 232bI1 is one, and the center (symmetry center) of its gap 232bI1-2 is located at the center of the length direction of the brush strip 232bI1; the second type of brush strip 232bI2 is two, and the center of the gap 232bI2-2 deviates to the left from the center of the brush strip 232bI1 (dotted line in the figure) by a certain distance. In this modified example, the deviation distance is 1.5 times the length of the gap 232bI1-2, and the length of the gap 232bI1-2 is 10mm.

[0064] like Fig.15 As shown, the three brush strips are inserted and installed in the V-shaped opening grooves of the three brush strip bases 232a with the tightening openings facing upwards, and they are in an eight-shaped shape after installation. Each brush strip 232bI has two wings extending from the left and right ends of the roller to the middle part, and the spacing in the axial direction of the roller is gradually tightened, and finally forming a tightening opening (corresponding to the notch) 232bII-2. Fig.15 The installation method of the two second brush strips 232bI2 is as follows: the first (uppermost) brush strip 232bI2 is installed as follows Fig.14 The second (middle) brush strip 232bI2 is installed in the brush strip base 232a in the positive direction, and the second (middle) brush strip 232bI2 is installed in the opposite direction to the first brush strip 232bI2 ( Fig.14 The brush strip base 232a is interlaced and installed in the brush strip base 232a, thereby forming a brush strip on the roller 231. Fig.15 The two tightening openings on the first and second brush strips are staggered at two different opening positions on the left and right. The tightening openings of the three brush strips 232bI are staggered along the rotation direction of the roller 231; every time the roller 231 rotates one circle, the rotation track of the tightening opening of any brush strip is fully covered by the rotation track of the two wings of another or two brush strips.

[0065] Through such a structural setting, the gas flow rate and flow at the tightening mouth can be effectively improved, so that the central hair can be sucked away quickly, and the high-speed airflow causes the negative pressure to increase, which makes it easier to attract the hair on both sides and effectively improve the anti-entanglement effect and hair cleaning effect; moreover, each rotation cycle of the roller brush assembly 23 (a full circle in the circumferential direction) rotates stably without any gaps. The surface to be cleaned corresponding to the length direction of the roller brush assembly 23 will contact the brush strip and be cleaned by the brush strip 23. The cleaning track is complete and less dirt remains.

[0066] A better solution is: when the first brush strip 232bI1 rotates to face the air outlet, the tightening opening 232bI1-2 is opposite to the air outlet, that is, the tightening opening 232bI1-2 is located in space A; when the two second brush strips 232bII1 are respectively rotated to face the air outlet, the tightening openings 232bI2-2 are both located in the anti-turbulence area B.

[0067] <Modification 2>

[0068] In this second variation, only the structures that are different from the embodiment are described in detail, and the same symbols are given to the structures that are the same as the embodiment, and the same descriptions are omitted.

[0069] like Fig.16 and 17As shown, the three groups (individuals) of brush strips are the same type of brush strips 232bII with exactly the same structure and size. The brush strips 232bII themselves are continuous and straight, have no directionality, and are provided with rectangular gaps. The three brush strips 232bII are respectively inserted and installed in the V-shaped opening grooves of the brush strip base 232a. After installation, they are in an eight-shaped shape, with two wings 232bII-1 extending from the left and right ends of the roller 231 to the middle, and the axial spacing of the roller 231 is gradually tightened to finally form a tightening opening 232bII-2. The center of the tightening opening 232bII-2 deviates from the center of the brush strip 232bI by a certain distance. In this modified example, the length of the tightening opening 232bII-2 is 10mm, and the tightening opening 232bII-2 is from the center of the brush strip 232bII ( Fig.16 The center point line) starts from the left side and extends 10 mm to the left.

[0070] Fig.17 The installation method of the three brush strips 232bII is as follows: the first (uppermost) and the third (lowermost) brush strips 232bII are installed as follows: Fig.16 The middle brush strip 232a is installed in the brush strip base 232a in the positive direction, and the second (middle) brush strip 232bII is installed in the opposite direction ( Fig.16 The brush strip base 232a is interlaced and installed in the brush strip base 232a, thereby forming a brush strip on the roller 231. Fig.17 The tightening opening on the second brush strip is staggered relative to the opening position of any other brush strip. For example, when interlacing, the first brush strip 232bII enters the left side of the advanced opening slot on the right side, and the tightening opening 232bI-2 is slightly left of the center. The second brush strip 232bII turns to the left side of the advanced opening slot on the left side, and the tightening opening 232bII-2 is slightly right of the center. The third brush strip 232bII enters in the same way as the first brush strip 232bII. Looking along the rotation direction of the roller 231, the tightening openings 232bII-2 of the first / third and second brush strips 232bII are symmetrically distributed relative to the center line of the brush strip 232bII, and the tightening openings 232bII-2 are completely staggered (without any overlap). In this way, every time the roller 231 rotates one circle, the rotation trajectory of the tightening opening 232bII-2 of the second brush strip 232bII is fully covered by the rotation trajectory of the two wings of the first / third brush strip 232bI.

[0071] In this way, three identical brush strips 232bII are used, opening at the same position, and only one brush strip 232bII is installed in the opposite direction relative to the other two when interlaced. Different tightening openings 232bII-2 positions can be formed on the brush strip base through a simple structure and a clever installation method, and the three tightening openings 232bII-2 form an unobstructed central zigzag air path, which can effectively improve the gas flow rate and flow at the tightening opening 232bII-2, so that the central hair is quickly sucked away, and the high-speed airflow causes the negative pressure to increase, which makes it easier to attract the hair on both sides and improve the anti-entanglement effect and hair cleaning effect; further, each rotation cycle of the roller brush assembly 23 (one full circle in the circumferential direction) is stable, and the surface to be cleaned corresponding to the length direction of the roller brush assembly 23 will contact the brush strip 232bII and be cleaned by the brush strip, and the cleaning trajectory is complete. After the brush strip 232bII is inserted, the roller 231 is clamped with both hands and slowly rotated for one circle to see whether the gaps are staggered. The manufacturing, insertion and inspection of parts are more convenient than the left and right split brush strips 232bII.

[0072] A better solution is: when the three brush strips 232bII are rotated to face the air outlet respectively, the tightening openings 232bII2-2 are all located in the anti-turbulence area B.

[0073] The above embodiments and variations are merely examples of the technical solution of the utility model. The vacuum cleaner and vacuum system involved in the utility model are not limited to the contents described in the above embodiments, but are subject to the scope defined by the claims. Any modification, supplement or equivalent replacement made by a technician in the field of the utility model based on the embodiment is within the scope of protection required by the claims of the utility model.

[0074] For example, in the present invention, the brush strip may also be a structure without brush wires, such as a rubber strip or a plastic strip. In this case, the two wings of the figure eight or V-shaped brush strip have no brush wires but are formed by rubber / plastic strips.

[0075] In addition, the above embodiments and variations are all described by taking three groups of brush bar units / brush strips as an example, and the three groups are basically similar in shape, but the number of brush bar units / brush strips of the utility model is not limited to this. For example, fewer or more brush bar units / brush strips can be used. In addition, the utility model can also use brush bar units / brush strips of other different shapes to be formed on the roller, and the brush bar units / brush strips do not need to extend continuously from the left end to the right end of the roller, but some brush bar units / brush strips are only formed on the left side of the roller, some are only formed on the right side, or some are only formed in the middle of the roller. Moreover, these brush strips can all be brush wire structures, or all be brush wire-free structures, and there can also be both brush wire structures and brush wire-free structures.

Claims

1. A floor brush, which is connected to the ventilation duct of the vacuum cleaner, uses the negative pressure of the vacuum cleaner to generate an inhaled airflow to clean the dirt on the surface to be cleaned, and is characterized by: include: Floor brush body; An accommodating cavity, located in the floor brush body, for accommodating a roller brush assembly, and having a cleaning opening at the bottom facing the surface to be cleaned; An air outlet pipe, the outer end of which is matched and communicated with the ventilation duct, the air outlet pipe penetrates the accommodating cavity from the outside to the inside and forms an air outlet facing the roller brush assembly and adjacent to the roller brush assembly on the inner wall of the accommodating cavity, directing the negative pressure to the accommodating cavity, thereby forming a high-speed airflow from the cleaning opening to the air outlet; A traction portion, arranged in the accommodating cavity, for pulling hair away from the roller brush assembly, comprising: at least one row of traction teeth arranged at intervals along the axial direction of the roller brush assembly and with tooth tips pointing to the roller brush assembly; Among them, the spatial area in the accommodating cavity, extending from the edge of the air outlet along the penetration direction of the air outlet pipe to the roller surface of the roller brush assembly is recorded as space A, the position of space A is kept unchanged, and its cross-sectional area is proportionally enlarged by at least 50% to obtain space B as the anti-turbulence area, the traction portion is formed outside the anti-turbulence area, and the traction teeth are formed on both sides of the left and right sides of the air outlet.

2. The floor brush according to claim 1, characterized in that: in, The traction part comprises: 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 are not staggered.

3. The floor brush according to claim 2, characterized in that: in, The shortest distance between the lowest point and the highest point of the air outlet is used as the opening height of the air outlet, and the air outlet is divided into three equal parts: lower part, middle part and upper part based on the opening height, and 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 is detachably mounted in the accommodating cavity, comprising a rotatable roller and a plurality of groups of brush strips mounted on the roller; Among them, the brush strip is configured to be: V-shaped when viewed in the rotation direction of the roller brush assembly, with two wings extending from the left and right ends of the roller to the middle and the spacing in the axial direction of the roller gradually tightening, and a middle section connecting the two wings; the brush wire thickness or density 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 is detachably mounted in the accommodating cavity, comprising a rotatable roller and at least two groups of brush strip units mounted on the roller; Among them, the brush strip unit is in an eight-shape, with two wings extending from the left and right ends of the roller to the middle and the spacing in the axial direction of the roller gradually tightens to finally form a tightening opening; and along the rotation direction of the roller, the tightening openings of at least one group of brush strip units are staggered with the tightening openings of other brush strip units along the rotation direction of the roller; every time the roller rotates one circle, the rotation trajectory of the tightening openings of any group of brush strip units is fully covered by the rotation trajectory of the two wings of the remaining brush strip units.

7. The floor brush according to claim 6, characterized in that: in, The center of the tightening opening of at least one group of the brush strip units deviates from the center in the length direction of the brush strip by a certain distance, and the rotation trajectory of the tightening opening 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 group of the brush strip units is located at the center of the brush strip in the 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 mounted in the accommodating cavity, and comprises: a rotatable roller, a plurality 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 in an arc shape on the surface of the roller, the end cover is provided with an arc slope, and the windward side of at least one brush strip unit is smoothly connected to one of the arc slopes to form a guide blade that guides the flow from the end cover to the middle of the roller.

10. A vacuum cleaner, characterized in that include: The vacuum cleaner body has a negative pressure source for generating negative pressure and a ventilation duct for transmitting the negative pressure to the outside; A floor brush is matched and connected with the ventilation duct, and uses the negative pressure to generate an inhaled airflow to clean the dirt on the surface to be cleaned; Wherein, the floor brush is the floor brush described in any one of claims 1 to 9.

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