Rolling brush device, floor brush and cleaning equipment

Abstract

The invention relates to the technical field of ground cleaning, in particular to a rolling brush device, a ground brush and cleaning equipment, the rolling brush device comprises a rolling brush shaft, a rolling brush body and a plurality of movable plates, and the rolling brush body and the movable plates are rotatably arranged on the rolling brush shaft in a sleeving mode; the movable plate can reciprocate between a first position and a second position relative to the rolling brush body when rotating; when the movable plate is located at the first position, the rotating outer diameter of the movable plate is smaller than that of the rolling brush body; when the movable plate is located at the second position, the rotating outer diameter of the movable plate is larger than or equal to the rotating outer diameter of the rolling brush body. According to the arrangement, when the movable plate rotates to the first position, the rotating outer diameter of the movable plate is smaller than that of the rolling brush body, and at the moment, the rolling brush body is exposed and can be used for cleaning garbage on the ground and adhering hair; when the movable plate rotates to the second position, the rotating outer diameter of the movable plate is larger than or equal to the rotating outer diameter of the rolling brush body, at the moment, the movable plate can enable the hair on the rolling brush body to fall off, and the purpose of preventing the hair from being wound on the rolling brush body is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of floor cleaning, in particular to a rolling brush device, a floor brush and a cleaning device. BACKGROUND

[0002] At present, most of the vacuum cleaners on the market are equipped with a floor brush with a rolling brush body. The rolling brush beats the ground by high-speed rotation, thereby lifting the garbage adhering to the ground, so that the garbage is sucked into the vacuum cleaner. However, the high-speed rotating rolling brush is easy to entangle hair. After using the vacuum cleaner for cleaning for many times, the rolling brush will be entangled by hair, resulting in poor cleaning effect, and even the rolling brush cannot rotate. Moreover, the hair entangled on the rolling brush is difficult to clean, and manual cleaning is time-consuming and laborious, and it also dirties the user's hands, which is very poor user experience.

[0003] Patent No. CN222323500U discloses a hair-entangling-preventing rolling brush mechanism and a cleaning device. The mechanism includes a mounting base and a cleaning rolling brush structure. The mounting base is provided with a rolling brush mounting groove matched with the cleaning rolling brush structure, and the cleaning rolling brush structure is installed in the rolling brush mounting groove. The cleaning rolling brush structure includes a cleaning rolling brush that can rotate around its axis. The cleaning rolling brush is provided with a main knife structure extending along the axis direction of the cleaning rolling brush. The rolling brush mounting groove is provided with an auxiliary knife structure opposite to the cleaning rolling brush, which extends along the axis direction of the cleaning rolling brush. When the cleaning rolling brush rotates and the main knife structure passes through the auxiliary knife structure, the side of the main knife structure facing the auxiliary knife structure contacts or gaps with the side of the auxiliary knife structure facing the main knife structure. The prior art cuts the hair entangled on the cleaning rolling brush by setting the main knife structure and the auxiliary knife structure. However, the prior art structure is complex, and after the hair is cut, part of the hair will still be entangled on the cleaning rolling brush.

[0004] Therefore, the prior art still has room for improvement and development. SUMMARY

[0005] In order to solve the problems of the prior art, the present application provides a rolling brush device, a floor brush and a cleaning device, which can prevent hair from being entangled on the rolling brush body.

[0006] In order to achieve the above-mentioned purpose, the technical scheme applied by the present application is as follows: A roller brush device includes a roller brush shaft, a roller brush body, and a movable plate. The roller brush body and the movable plate are rotatably mounted on the roller brush shaft. The movable plate can reciprocate relative to the roller brush body in a first position and a second position during rotation. When the movable plate is in the first position, its outer diameter of rotation is smaller than that of the roller brush body. When the movable plate is in the second position, its outer diameter of rotation is greater than or equal to that of the roller brush body. This configuration allows the roller brush body to be exposed when the movable plate is in the first position (where its outer diameter is smaller than that of the roller brush body), enabling it to clean ground debris and trap hair. When the movable plate is in the second position (where its outer diameter is greater than or equal to that of the roller brush body), it can remove hair from the roller brush body, preventing hair from becoming entangled on it.

[0007] According to the above scheme, the roller brush shaft has a first rotation axis and a second rotation axis that are parallel and spaced apart; the roller brush body can rotate around the first rotation axis, and the axis of the roller brush body coincides with the first rotation axis; the movable plate can roll around the outer wall of the roller brush shaft. When the movable plate is in the first position, the axis of the movable plate coincides with the axis of the roller brush body; when the movable plate is in the second position, the axis of the movable plate does not coincide with the axis of the roller brush body. With this configuration, when the movable plate rotates, the axis of the movable plate and the axis of the roller brush body cyclically switch between coinciding (first position) and not coinciding (second position).

[0008] According to the above scheme, the movable plate is movably located outside the roller brush body. A collar is provided on the inner wall of the movable plate, which passes through the roller brush body and is fitted onto the roller brush shaft. The inner diameter of the collar is larger than the outer diameter of the roller brush shaft. When the movable plate rolls around the outer wall of the roller brush shaft, the inner wall of the collar and the outer wall of the roller brush shaft are tangent. This arrangement ensures that when the movable plate rotates, the inner wall of the collar and the outer wall of the roller brush shaft are in close contact during circular motion, preventing noise caused by the movable plate jumping during rotation. Furthermore, during rotation, the axis of the movable plate and the axis of the roller brush body cyclically switch between overlapping (first position) and non-overlapping (second position).

[0009] According to the above scheme, the roller brush body is provided with a ring through hole corresponding to the ring, and the outer wall of the roller brush body is provided with bristles; the movable plate is provided with a bristle through hole corresponding to the bristles, and the bristles can extend or retract relative to the bristle through hole; when the movable plate is in the first position, the outer diameter of the movable plate is smaller than the outer diameter of the bristles, and the bristles extend relative to the bristle through hole; when the movable plate is in the second position, the outer diameter of the movable plate is greater than or equal to the outer diameter of the bristles, and the bristles retract relative to the bristle through hole. With this configuration, when the movable plate is in the first position, the bristles are exposed relative to the bristle through hole, which can be used to clean the floor and adhere to hair; when the movable plate is in the second position, the bristles retract relative to the bristle through hole, and during the retraction process, the hair on the bristles is detached by the movable plate.

[0010] According to the above scheme, the elastic member is arranged between the inner wall of the movable plate and the outer wall of the roller brush body; when the movable plate is located at the first position, the elastic member is in a compressed state; when the movable plate is located at the second position, the elastic member is in a rebound state. In this way, under the action of the deformation of the elastic member, the movable plate reciprocates between the first position and the second position.

[0011] According to the above scheme, the two ends of the roller brush body are provided with first sealing and silencing members corresponding to the movable plate. In this way, the first sealing and silencing members play a role in shock absorption and silencing, and also prevent hair from entering the inside of the roller brush body.

[0012] According to the above scheme, the roller brush body is rotatably sleeved on the outside of the roller brush shaft through a bearing, and the two ends of the roller brush body are fixed with roller brush end covers; the two end inner walls of the movable plate are provided with first position limiting edges and second position limiting edges corresponding to the roller brush end covers; and the two end outer walls of the roller brush body are provided with protrusions. In this way, the first position limiting edges and the second position limiting edges limit the movable plate at the first position and the second position, and the protrusions prevent hair from entering the inside of the roller brush body.

[0013] According to the above scheme, the roller brush end covers are provided with second sealing and silencing members corresponding to the first position limiting edges and the second position limiting edges. In this way, the second sealing and silencing members play a role in shock absorption and silencing.

[0014] The floor brush disclosed by the application comprises a floor brush main body and the above-mentioned roller brush device, the floor brush main body is formed with an inner cavity for accommodating the roller brush device, the inner cavity is provided with a floor brush outlet and a floor brush inlet, when the floor brush inlet corresponds to the movable plate, the movable plate is located at the first position; when the floor brush outlet corresponds to the movable plate, the movable plate is located at the second position; and the floor brush main body is provided with a driving assembly for driving the roller brush body to rotate. In this way, when the floor brush inlet corresponds to the movable plate, the movable plate is located at the first position, at this time, the bristles are exposed and protrude out of the bristle through hole, and can be used for cleaning hair at the position of the floor brush inlet; when the floor brush outlet corresponds to the movable plate, the movable plate is located at the second position, at this time, the bristles are retracted relative to the bristle through hole, and the hair is sucked away through the floor brush outlet after being shed by the movable plate.

[0015] The cleaning equipment disclosed by the application comprises a cleaning main body and the above-mentioned floor brush, the cleaning main body is provided with a power control assembly, a main motor assembly, a dust cup assembly and an air duct assembly. In this way, the main motor assembly is arranged between the inlet of the dust cup assembly and the outlet of the air duct assembly, the main motor assembly generates negative pressure during work and can be used for sucking in garbage, and the dust cup assembly is used for storing garbage; the inlet of the air duct assembly is communicated with the outlet of the floor brush, and hair can be sucked into the dust cup assembly; and the power control assembly is used for controlling the opening and closing of the cleaning equipment.

[0016] The application has the following beneficial effects: The present application is configured as follows: when the movable plate is rotated to the first position, the outer diameter of the rotation of the movable plate is smaller than the outer diameter of the rotation of the roller brush body, at which time the roller brush body is exposed and can be used to clean ground garbage and adhere to hair; when the movable plate is rotated to the second position, the outer diameter of the rotation of the movable plate is greater than or equal to the outer diameter of the rotation of the roller brush body, at which time the movable plate can cause the hair on the roller brush body to fall off, thereby preventing the hair from winding around the roller brush body. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a partial schematic view of the roller brush device of the present application; Figure 2 is Figure 1 is a schematic view of the roller brush device of the present application with the roller brush body removed; Figure 3 is an exploded view of the roller brush device of the present application; Figure 4 is a schematic view of the movable plate of the present application; Figure 5 is a cross-sectional view of the roller brush device of the present application; Figure 6 is a schematic view of the rotation of the roller brush body and the movable plate of the present application about a first rotation axis; Figure 7 is a schematic view of the rotation of the movable plate of the present application about a second rotation axis; Figure 8 is a schematic view of the principle of one rotation of the roller brush device of the present application; Figure 9 is a perspective view of the ground brush of the present application; Figure 10 is Figure 9 is a cross-sectional view; Figure 11 is a cross-sectional view of the ground brush of the present application when the movable plate is in the first position; Figure 12 is a cross-sectional view of the ground brush of the present application when the movable plate is in the second position; Figure 13 is a cross-sectional view of the ground brush of the present application; Figure 14 is Figure 13 is an enlarged view of position A in Figure 15 is a cross-sectional view of the main body of the ground brush of the present application; Figure 16 is a perspective view of the cleaning device of the present application; Figure 17 is Figure 16 is a cross-sectional view.

[0018] in the drawings: 1. Cleaning body; 11. Power control assembly; 12. Main motor assembly; 13. Dust cup assembly; 14. Air duct assembly; 2. Floor brush body; 21. Floor brush motor; 22. Drive module; 23. Floor brush outlet; 24. Floor brush inlet; 3. Roller brush device; 31. Roller brush body; 311. Ring through hole; 32. Movable plate; 321. Ring; 322. Protrusion; 323. Bristle through hole; 324. First position limiting stop; 325. Second position limiting stop; 33. Roller brush shaft; 331. First rotating shaft; 332. Second rotating shaft; 34. Bristles; 35. Roller brush end cap; 36. Elastic element; 37. First sealing and noise reduction element; 38. Bearing; 39. Connector; 310. Second sealing and noise reduction element. Detailed Implementation

[0019] The technical solution of the present invention will be described below with reference to the accompanying drawings and embodiments.

[0020] like Figures 1 to 8 As shown, the present invention provides a roller brush device comprising a roller brush shaft 33, a roller brush body 31, and a movable plate 32. The roller brush body 31 and the movable plate 32 are rotatably mounted on the roller brush shaft 33. When the movable plate 32 rotates, it can reciprocate relative to the roller brush body 31 in a first position and a second position. When the movable plate 32 is in the first position, the outer diameter of the movable plate 32 is smaller than the outer diameter of the roller brush body 31. When the movable plate 32 is in the second position, the outer diameter of the movable plate 32 is greater than or equal to the outer diameter of the roller brush body 31. With this configuration, when the movable plate 32 rotates to the first position, the outer diameter of the movable plate 32 is smaller than the outer diameter of the roller brush body 31. At this time, the roller brush body 31 is exposed and can be used to clean up ground debris and adhere to hair. When the movable plate 32 rotates to the second position, the outer diameter of the movable plate 32 is greater than or equal to the outer diameter of the roller brush body 31. At this time, the movable plate 32 can remove the hair from the roller brush body 31, thereby preventing hair from getting tangled on the roller brush body 31.

[0021] Furthermore, the roller brush shaft 33 has a first rotation axis 331 and a second rotation axis 332 arranged parallel and spaced apart; the roller brush body 31 can rotate around the first rotation axis 331, and the axis of the roller brush body 31 coincides with the first rotation axis 331; the movable plate 32 can roll around the outer wall of the roller brush shaft 33; when the movable plate 32 is in the first position, the axis of the movable plate 32 and the axis of the roller brush body 31 coincide; when the movable plate 32 is in the second position, the axis of the movable plate 32 and the axis of the roller brush body 31 do not coincide. With this configuration, when the movable plate 32 rotates, the axis of the movable plate 32 and the axis of the roller brush body 31 cycle between coincidence (first position) and non-coincidence (second position).

[0022] Further, the movable plate 32 is movably arranged outside the roller brush body 31, and a sleeve ring 321 is arranged on the inner wall of the movable plate 32, the sleeve ring 321 is sleeved on the roller brush shaft 33 after penetrating through the roller brush body 31; the inner diameter of the sleeve ring 321 is larger than the outer diameter of the roller brush shaft 33, and when the movable plate 32 rolls around the outer wall of the roller brush shaft 33, the inner wall of the sleeve ring 321 and the outer wall of the roller brush shaft 33 are tangent to each other. In this way, when the movable plate 32 rotates, the inner wall of the sleeve ring 321 and the outer wall of the roller brush shaft 33 are in close contact and move in a circular motion, which can prevent the movable plate 32 from jumping and causing noise when the movable plate 32 rotates; and during the rotation of the movable plate 32, the axis of the movable plate 32 and the axis of the roller brush body 31 are cyclically switched between coinciding (first position) and not coinciding (second position).

[0023] Preferably, a plurality of movable plates 32 are arranged in a ring shape outside the roller brush body 31; and two sleeve rings 321 are arranged on each movable plate 32.

[0024] Further, the roller brush body 31 is provided with a sleeve ring through hole 311 corresponding to the sleeve ring 321, and the outer wall of the roller brush body 31 is provided with bristles 34; the movable plate 32 is provided with a bristle through hole 323 corresponding to the bristles 34, and the bristles 34 can be extended or retracted relative to the bristle through hole 323; when the movable plate 32 is in the first position, the rotating outer diameter of the movable plate 32 is smaller than the rotating outer diameter of the bristles 34, at this time the bristles 34 are extended relative to the bristle through hole 323; when the movable plate 32 is in the second position, the rotating outer diameter of the movable plate 32 is greater than or equal to the rotating outer diameter of the bristles 34, at this time the bristles 34 are retracted relative to the bristle through hole 323. In this way, when the movable plate 32 is in the first position, the bristles 34 are exposed relative to the bristle through hole 323, which can be used for cleaning the ground and adhering hair; when the movable plate 32 is in the second position, the bristles 34 are retracted relative to the bristle through hole 323, and during the retraction process, the hair on the bristles 34 is shed by the movable plate 32.

[0025] Wherein, when the movable plate 32 rotates from the first position to the second position, the movable plate 32 gradually moves from inside to outside, so that the hair on the bristles 34 gradually falls off; when the movable plate 32 rotates from the second position to the first position, the movable plate 32 gradually moves from outside to inside.

[0026] Further, a resilient member 36 is arranged between the inner wall of the movable plate 32 and the outer wall of the roller brush body 31; when the movable plate 32 is in the first position, the resilient member 36 is in a compressed state; when the movable plate 32 is in the second position, the resilient member 36 is in a rebound state. In this way, under the action of the deformation of the resilient member 36, the movable plate 32 reciprocates between the first position and the second position.

[0027] Preferably, the resilient member 36 has two, and the two resilient members 36 are arranged near the two sleeve rings 321, so that the movable plate 32 moves more stably during reciprocation.

[0028] Further, the two ends of the rolling brush body 31 are provided with first sealing and silencing members 37 corresponding to the movable plate 32. In this way, the first sealing and silencing members 37 play a role of shock absorption and silencing, and also prevent hair from entering the inside of the rolling brush body 31.

[0029] Further, the rolling brush body 31 is rotatably sleeved outside the rolling brush shaft 33 through a bearing 38, and the two ends of the rolling brush body 31 are fixed with rolling brush end covers 35; the two end inner walls of the movable plate 32 are provided with first position limiting flanges 324 and second position limiting flanges 325 corresponding to the rolling brush end covers 35; and the two end outer walls of the rolling brush body 31 are provided with protrusions 322. In this way, the first position limiting flanges 324 and the second position limiting flanges 325 play a role of limiting the position of the movable plate 32 at the first position and the second position; and the protrusions 322 prevent hair from entering the inside of the rolling brush body 31.

[0030] Preferably, the bearing 38 has a plurality of bearings.

[0031] Further, the rolling brush end covers 35 are provided with second sealing and silencing members 310 corresponding to the first position limiting flanges 324 and the second position limiting flanges 325. In this way, the second sealing and silencing members 310 play a role of shock absorption and silencing.

[0032] As shown in FIG. 1, Figures 9 to 15 a floor brush, which comprises a floor brush body 2 and the rolling brush device 3 described above, and an inner cavity for accommodating the rolling brush device 3 is formed in the floor brush body 2, the inner cavity is provided with a floor brush outlet 23 and a floor brush inlet 24, when the floor brush inlet 24 corresponds to the movable plate 32, the movable plate 32 is located at the first position; when the floor brush outlet 23 corresponds to the movable plate 32, the movable plate 32 is located at the second position; and the floor brush body 2 is provided with a driving assembly for driving the rolling brush body 31 to rotate. In this way, when the floor brush inlet 24 corresponds to the movable plate 32, the movable plate 32 is located at the first position, at this time, the bristles 34 are exposed and protrude relative to the bristle through holes 323, and can be used for cleaning the hair at the position of the floor brush inlet 24; when the floor brush outlet 23 corresponds to the movable plate 32, the movable plate 32 is located at the second position, at this time, the bristles 34 are retracted relative to the bristle through holes 323, and the hair is sucked away through the floor brush outlet 23 after being dropped by the movable plate 32.

[0033] In the floor brush, the rolling brush shaft 33 is fixed in the inner cavity, the rolling brush end covers 35 are provided with connecting heads 39, the driving assembly comprises a floor brush motor 21 and a driving module 22, the output end of the driving module 22 is connected with the connecting heads 39, and the input end of the driving module 22 is connected with the output end of the floor brush motor 21; when the floor brush motor 21 works, the driving module 22 is driven to rotate, the driving module 22 drives the connecting heads 39 to rotate, and the connecting heads 39 drive the rolling brush end covers 35 and the rolling brush body 31 to rotate.

[0034] Preferably, the driving module 22 includes a gear set, a belt or the like transmission mechanism, and transmits the power of the brush motor 21 to the roller brush body 31, so that the roller brush body 31 rotates at a high speed.

[0035] As shown in Figure 16 and Figure 17 , a cleaning device includes a cleaning main body 1 and the above-mentioned ground brush, and the cleaning main body 1 is provided with a power control assembly 11, a main motor assembly 12, a dust cup assembly 13 and an air duct assembly 14. In this way, the main motor assembly 12 is arranged between the inlet of the dust cup assembly 13 and the outlet of the air duct assembly 14, and the main motor assembly 12 generates negative pressure during operation and can be used for suction of garbage, and the dust cup assembly 13 is used for storing garbage; the inlet of the air duct assembly 14 is communicated with the outlet 23 of the ground brush, and hair can be sucked into the dust cup assembly 13; the power control assembly 11 is used for controlling the opening and closing of the cleaning device.

[0036] Preferably, the power control assembly 11 includes a battery pack and a circuit board, the circuit board is responsible for controlling the operation and safety protection of each function of the cleaning device, and displays information such as power and machine running state; the battery pack is used for power support, so that the cleaning device can be used without external power supply, and cleaning is convenient; a filter is arranged in the dust cup assembly 13, which separates air and garbage, and the air is discharged outside the machine, and the garbage is left in the dust collecting cavity of the dust cup assembly 13.

[0037] Working principle of the present application: The user presses the power control assembly 11, and outputs a working signal, and the battery pack supplies power to the main motor assembly 12 and the brush motor 21, and the brush motor 21 drives the roller brush body 31 to rotate through the driving module 22 when working, the bristles 34 rotate at a high speed with the roller brush body 31, and then beat and wipe the ground garbage, the main motor assembly 12 works to form negative pressure, the garbage is sucked from the ground brush inlet 24, and reaches the dust cup assembly 13 through the ground brush outlet 23 and the air duct assembly 14, during which the filter separates the garbage and the air, and the garbage is stored in the dust collecting cavity of the dust cup assembly 13; The roller brush shaft 33 is assembled and fixed in the inner cavity of the ground brush main body 2, and is movably connected with the roller brush body 31 through the bearing 38, and the roller brush shaft 33 is static when the roller brush body 31 rotates at a high speed, and the roller brush body 31 and the movable plate 32 rotate around the roller brush shaft 33; The movable plate 32 is arranged outside the roller brush body 31, and when the movable plate 32 rotates to the closest position to the ground (corresponding to the ground brush inlet 24), the bristles 34 are maximally exposed in the first position; when the movable plate 32 rotates away from the ground (out of position with the ground brush inlet 24), the bristles 34 gradually retract inside the movable plate 32, and when the movable plate 32 corresponds to the ground brush outlet 23, the bristles 34 are in the second position, and the fallen hair can be sucked into the dust cup assembly 13 through the ground brush outlet 23 and the air duct assembly 14.

[0038] The embodiments of the present application are described above with reference to the accompanying drawings, but the present application is not limited to the above-described specific embodiments, and the above-described specific embodiments are merely illustrative, but not restrictive, and a person of ordinary skill in the art can make many forms under the inspiration of the present application without departing from the purpose of the present application and the scope protected by the claims, which all belong to the protection scope of the present application.

Claims

1. A roller brush device, characterized in that: It includes a roller brush shaft (33), a roller brush body (31) and multiple movable plates (32), wherein the roller brush body (31) and the movable plates (32) are rotatably sleeved on the roller brush shaft (33); When the movable plate (32) rotates, it can reciprocate relative to the roller brush body (31) in a first position and a second position. When the movable plate (32) is in the first position, the outer diameter of the movable plate (32) is smaller than the outer diameter of the roller brush body (31). When the movable plate (32) is in the second position, the outer diameter of the movable plate (32) is greater than or equal to the outer diameter of the roller brush body (31).

2. The roller brush device according to claim 1, characterized in that: The roller brush shaft (33) has a first rotating axis (331) and a second rotating axis (332) that are parallel and spaced apart. The roller brush body (31) can rotate around the first rotating axis (331), and the axis of the roller brush body (31) coincides with the first rotating axis (331). The movable plate (32) can roll around the outer wall of the roller brush shaft (33). When the movable plate (32) is in the first position, the axis of the movable plate (32) and the axis of the roller brush body (31) coincide. When the movable plate (32) is in the second position, the axis of the movable plate (32) and the axis of the roller brush body (31) do not coincide.

3. The roller brush device according to claim 2, characterized in that: The movable plate (32) is located outside the roller brush body (31). A collar (321) is provided on the inner wall of the movable plate (32). The collar (321) passes through the roller brush body (31) and is fitted onto the roller brush shaft (33). The inner diameter of the collar (321) is larger than the outer diameter of the roller brush shaft (33). When the movable plate (32) rolls around the outer wall of the roller brush shaft (33), the inner wall of the collar (321) and the outer wall of the roller brush shaft (33) are tangent.

4. The roller brush device according to claim 3, characterized in that: The roller brush body (31) is provided with a collar through hole (311) corresponding to the collar (321), and the outer wall of the roller brush body (31) is provided with bristles (34); the movable plate (32) is provided with a bristle through hole (323) corresponding to the bristles (34), and the bristles (34) can extend or retract relative to the bristle through hole (323); when the movable plate (32) is in the first position, the outer diameter of the movable plate (32) is smaller than the outer diameter of the bristles (34), and the bristles (34) extend relative to the bristle through hole (323); when the movable plate (32) is in the second position, the outer diameter of the movable plate (32) is greater than or equal to the outer diameter of the bristles (34), and the bristles (34) retract relative to the bristle through hole (323).

5. A roller brush device according to claim 2, characterized in that: An elastic element (36) is provided between the inner wall of the movable plate (32) and the outer wall of the roller brush body (31); when the movable plate (32) is in the first position, the elastic element (36) is in a compressed state; when the movable plate (32) is in the second position, the elastic element (36) is in a rebound state.

6. A roller brush device according to claim 2, characterized in that: The two ends of the roller brush body (31) are provided with first sealing and sound-absorbing components (37) corresponding to the movable plate (32).

7. A roller brush device according to claim 2, characterized in that: The roller brush body (31) is rotatably mounted on the outside of the roller brush shaft (33) via multiple bearings (38). Roller brush end caps (35) are fixed at both ends of the roller brush body (31). The inner walls of both ends of the movable plate (32) are provided with a first position limiting stop (324) and a second position limiting stop (325) corresponding to the roller brush end caps (35). The outer walls of both ends of the roller brush body (31) are provided with protrusions (322).

8. A roller brush device according to claim 7, characterized in that: The roller brush end cap (35) is provided with a second sealing and silencing component (310) corresponding to the first position limiting stop (324) and the second position limiting stop (325).

9. A floor brush, characterized in that: The brush assembly includes a brush body (2) and a roller brush device (3) as described in any one of claims 1-8. The brush body (2) has an inner cavity formed therein for accommodating the roller brush device (3). The inner cavity is provided with a brush outlet (23) and a brush inlet (24). When the brush inlet (24) corresponds to the movable plate (32), the movable plate (32) is located in a first position. When the brush outlet (23) corresponds to the movable plate (32), the movable plate (32) is located in a second position. The brush body (2) is provided with a drive assembly for driving the roller brush body (31) to rotate.

10. A cleaning device, characterized in that: It includes a cleaning body (1) and the floor brush as described in claim 9, wherein the cleaning body (1) is provided with a power control assembly (11), a main motor assembly (12), a dust cup assembly (13) and an air duct assembly (14).

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