Cleaning belt component and cleaning device

Abstract

A cleaning belt component and a cleaning device. The cleaning belt component comprises: an annular belt, a first roller, a second roller, a first support and a second support, wherein the first roller and the second roller are distributed spaced apart from each other; the annular belt is rotationally arranged around the first roller and the second roller; and the first roller is rotationally connected to the first support, the second roller is rotationally connected to the second support, and the first support and the second support are rotationally connected by means of a rotary shaft, and can rotate relative to each other so as to adjust an included angle between the first support and the second support and thus adjust the spacing between the first roller and the second roller. Thus, the annular belt can be in a tensioned or loosened state by adjusting the spacing between the first roller and the second roller, and therefore a user can conveniently and rapidly replace the annular belt, saving on time and effort of the user.

Description

Cleaning belt component and cleaning device

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on August 25, 2023, with application number CN202322310901.8 and application name “Cleaning Belt Component and Cleaning Device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of cleaning technology, and in particular to a cleaning belt component and a cleaning device. Background Art

[0003] With the development of science and technology, more and more cleaning devices have appeared on the market. Some of the cleaning devices with mopping function achieve cleaning by dragging a cleaning belt against the surface to be cleaned.

[0004] Since the cleaning tape is in contact with the dirty surface to be cleaned for a long time, it is necessary to replace the cleaning tape after a period of use to avoid secondary contamination during the cleaning process. Existing cleaning tapes are usually firmly fixed to the cleaning device, which is troublesome to remove and install, making it difficult for users to quickly replace the cleaning tape.

[0005] Application Contents

[0006] In view of the above existing situation, the present application aims to provide a cleaning belt component and a cleaning device.

[0007] To this end, a first aspect of the present application provides a cleaning belt assembly. The cleaning belt assembly comprises an endless belt, a first roller, a second roller, a first support member, and a second support member. The first roller and the second roller are spaced apart, and the endless belt rotatably surrounds the first and second rollers. The first roller is rotatably connected to the first support member, and the second roller is rotatably connected to the second support member. The first and second support members are rotatably connected via a rotating shaft, and can be rotated relative to each other to adjust the angle between the first and second support members, thereby adjusting the spacing between the first and second rollers.

[0008] A second aspect of the present application provides a cleaning device, which includes the cleaning belt member described above.

[0009] The cleaning belt assembly disclosed herein includes an endless belt, a first roller, a second roller, a first support member, and a second support member. During use, the user rotates the first and second support members to adjust the angle between them, thereby adjusting the distance between the first and second rollers. When the user widens the distance between the first and second rollers, the endless belt wrapped around the first and second rollers becomes taut, allowing the endless belt to be used to mop the surface to be cleaned. When the user narrows the distance between the first and second rollers, the endless belt wrapped around the first and second rollers becomes loose, allowing the user to easily remove the endless belt and replace it with a new one. After replacing the endless belt, the user simply readjusts the distance between the first and second rollers to tighten the endless belt. This makes assembly and disassembly of the cleaning belt quick and easy, allowing the user to quickly replace the endless belt, saving time and effort. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Embodiments of the present application will now be explained in further detail, by way of example only, with reference to the accompanying drawings, in which:

[0011] FIG. 1 is a side view showing a cleaning belt member according to the present application.

[0012] FIG. 2 is a schematic diagram showing the overall structure of the cleaning belt member involved in the present application.

[0013] FIG. 3 is a schematic diagram showing a partial structure of a cleaning belt member according to the present application.

[0014] FIG4 is a diagram showing a state in which the first support member and the second support member involved in the present application are relatively rotated toward the second side.

[0015] FIG. 5 is a partial exploded view showing a cleaning belt member according to the present application.

[0016] FIG. 6 is another partial exploded view showing the cleaning belt member according to the present application.

[0017] FIG. 7 is another partial exploded view showing the cleaning belt member according to the present application.

[0018] FIG8 is a schematic diagram showing a partial structure of the first support member involved in the present application.

[0019] FIG9 is a schematic diagram showing a first plane and a second plane involved in the present application.

[0020] FIG10 is another schematic diagram showing the first plane and the second plane involved in the present application.

[0021] FIG. 11 is a schematic diagram showing a partial structure of another embodiment of a cleaning belt member according to the present application.

[0022] FIG. 12 is a diagram showing a state in which the first supporting member and the second supporting member of another embodiment of the cleaning belt member according to the present application are relatively rotated toward the second side.

[0023] FIG. 13 is an exploded view showing another embodiment of the cleaning belt member according to the present application.

[0024] FIG14 is a schematic diagram showing the cooperation between the driving motor and the second roller involved in the present application.

[0025] FIG15 is a schematic diagram showing the overall structure of the cleaning device involved in the present application.

[0026] FIG. 16 is a partial cross-sectional view showing the cleaning device according to the present application.

[0027] FIG. 17 is a partial cross-sectional view showing another embodiment of the cleaning device according to the present application.

[0028] FIG. 18 is a partial cross-sectional view showing another embodiment of the cleaning device according to the present application.

[0029] 10. Cleaning belt member; 10a. First side; 10b. Second side; 11. First connecting frame; 12. Second connecting frame; 13. First plane; 14. Second plane; 15. Groove; 16. Empty slot; A. First angle; B. Second angle; 20. Endless belt; 30. First roller; 40. Second roller; 50. First supporting member; 51. First rotating portion; 52. Supporting portion; 60. Second supporting member; 61. Second rotating portion; 70. Rotating shaft; 80. Limiting mechanism; 81. First limiting member; 82. Second limiting member; 83. Connecting member Arc connecting portion; 84, first limiting surface; 841, first free surface; 842, first abutting surface; 85, second limiting surface; 851, second free surface; 852, second abutting surface; 90, driving motor; 91, machine body; 92, first driving shaft; 93, second driving shaft; 94, bracket; 100, cleaning device; 110, first cleaning auxiliary part; 120, second cleaning auxiliary part; 130, rolling brush part; 140, third cleaning auxiliary part; 1401, auxiliary endless belt; 1402, third roller; 1403, fourth roller; 150, recovery container. DETAILED DESCRIPTION

[0030] The preferred embodiments of the present application are described in detail below with reference to the accompanying drawings. In the following description, identical components are assigned identical reference numerals and duplicate descriptions are omitted. In addition, the accompanying drawings are merely schematic diagrams, and the ratios of the dimensions of the components or the shapes of the components may differ from the actual ones.

[0031] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship and movement status between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0032] It should also be noted that when an element is referred to as being "fixed on" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element.

[0033] In addition, the terms "first," "second," and so on, used in this application are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features designated as "first" or "second" may explicitly or implicitly include at least one such feature. Furthermore, the technical solutions of various embodiments may be combined, but this must be based on the assumption that they can be implemented by a person of ordinary skill in the art. If the combination of technical solutions contradicts or is unimplementable, such a combination shall be deemed non-existent and outside the scope of protection claimed in this application. With the advancement of technology, an increasing number of cleaning devices have appeared on the market, some of which feature mopping functions and utilize a cleaning belt to mop the surface to be cleaned. Because the cleaning belt is in constant contact with the dirty surface to be cleaned, it needs to be replaced after a period of use to avoid secondary contamination during the cleaning process. Existing cleaning belts are typically firmly fixed to the cleaning device, making it difficult to remove and install the cleaning belt, hindering quick replacement by the user. To this end, referring to Figures 1 to 4 , the first aspect of this application provides a cleaning belt assembly 10. The cleaning belt assembly 10 includes an endless belt 20, a first roller 30, a second roller 40, a first support member 50, and a second support member 60. The first roller 30 and the second roller 40 are spaced apart, and the endless belt 20 rotatably surrounds the first roller 30 and the second roller 40. The first roller 30 is rotatably connected to the first support member 50, and the second roller 40 is rotatably connected to the second support member 60. The first support member 50 and the second support member 60 are rotatably connected via a rotating shaft 70. The first support member 50 and the second support member 60 can be rotatably connected by relative rotation to adjust the angle between the first support member 50 and the second support member 60, thereby adjusting the spacing between the first roller 30 and the second roller 40. When using the cleaning belt assembly 10 involved in this application, the user rotates the first support member 50 and the second support member 60 to adjust the angle between them, thereby adjusting the spacing between the first roller 30 and the second roller 40. Specifically, referring to Figures 4 to 7 , it can be understood that when adjusting the spacing, the first support member 50 and the second support member 60 are folded about the rotation axis 70, thereby creating an angle between the first support member 50 and the second support member 60, thereby adjusting the spacing between the first roller 30 and the second roller 40. When the user widens the spacing between the first roller 30 and the second roller 40, the endless belt 20 wrapped around the first roller 30 and the second roller 40 is in a tensioned state, and the endless belt 20 can now be used to mop the surface to be cleaned. When the user narrows the spacing between the first roller 30 and the second roller 40, the endless belt 20 wrapped around the first roller 30 and the second roller 40 is in a loose state, and the user can easily remove the endless belt 20 and replace it with a new one. After replacing the endless belt 20, the spacing between the first roller 30 and the second roller 40 is readjusted to tighten the endless belt 20.Therefore, disassembling and assembling the endless belt 20 is simple and quick, and the user can quickly replace the endless belt 20 , saving the user's time and energy.

[0034] It should be noted that the endless belt 20 is configured to wrap around the first roller 30 and the second roller 40 to form a closed loop. When the cleaning belt assembly 10 cleans the surface to be cleaned, the endless belt 20 circulates along the surfaces of the first roller 30 and the second roller 40. Referring to Figures 1, 9, and 10, in an optional embodiment, the cleaning belt assembly 10 includes a first side 10a and a second side 10b that are opposed to each other. The angle formed by the first support member 50 and the second support member 60 toward the first side 10a is a first angle A. When the first support member 50 and the second support member 60 rotate relative to each other until the first angle A reaches a first angle, the spacing between the first roller 30 and the second roller 40 is at a first spacing, thereby achieving tensioning of the endless belt 20. The angle formed by the first support member 50 and the second support member 60 toward the second side 10b is a second angle B. When the first support member 50 and the second support member 60 rotate relative to each other until the second angle B reaches a second angle, the distance between the first roller 30 and the second roller 40 is smaller than the second distance, thereby releasing the tension on the endless belt 20. The second angle is smaller than the first angle.

[0035] When the annular belt 20 needs to be adjusted to a tensioned state, referring to Figures 1 and 9, the user rotates the first support member 50 and the second support member 60 toward the first side 10a to adjust the first support member 50 and the second support member 60 to the first angle A at the first angle.

[0036] Optionally, the first angle may be a fixed value.

[0037] Specifically, the first angle A is any fixed value within the first preset interval, and the first spacing can also be any fixed value within the second preset interval. For example, the first angle A can range from 160 degrees to 175 degrees. Thus, when the first angle A is at any angle between 160 degrees and 175 degrees, the first spacing corresponds to any spacing within the second preset interval. It should be noted that the endless belt 20 includes an elastic base layer and a cleaning layer disposed on the elastic base layer. When the spacing between the first roller 30 and the second roller 40 is adjusted to any value within the first spacing, the endless belt 20 is in a tensioned state due to the elasticity of the endless belt 20. It is understandable that when the first spacing is a small value, the endless belt 20 is in a slightly tensioned state, and when the first spacing is a large value, the endless belt 20 is in a relatively tight tensioned state.

[0038] It should be noted that the first angle A is any fixed value within the first preset range, and the first spacing is also any fixed value within the first preset range. This means that in a specific scenario, the first angle A for different cleaning belt components 10 can be the same or different, but the first angle A is always within the first preset range. For example, the first angle A corresponding to one cleaning belt component 10 may be 175 degrees, while the first angle A corresponding to another cleaning belt component 10 may be 174 degrees. This is not specifically limited here.

[0039] In other embodiments, the range of the first angle A may be greater than 175 degrees, which is not limited here.

[0040] When the tension of the endless belt 20 needs to be released, with reference to Figures 1 and 10, the user rotates the first support member 50 and / or the second support member 60 toward the second side 10b so that the first support member 50 and the second support member 60 are adjusted to the second angle B at the second angle. Specifically, the second angle can be a range of values, and the second spacing is a fixed value. For example, when the second angle is between 90-150 degrees, the spacing between the first roller 30 and the second roller 40 is less than the second spacing. The second spacing can also be understood as a critical value, that is, when the spacing between the first roller 30 and the second roller 40 is less than the second spacing, the endless belt 20 is in a relaxed state. The smaller the second angle, the closer the spacing between the first roller 30 and the second roller 40, and the more relaxed the endless belt 20.

[0041] In other embodiments, the second angle may also correspond to other range values, such as between 80-140 degrees, or between 80 degrees and 155 degrees, or less than 150 degrees, etc., which is not limited here.

[0042] It should be noted that the second angle B being a range of values ​​means that, in a specific scenario, for a cleaning belt member 10, any value within the range corresponding to the second angle will loosen the endless belt 20, thereby facilitating its removal. It should be noted that the second angle being less than the first angle means that, for a cleaning belt member 10, the maximum value of the second angle is also less than the first angle. Furthermore, the angles, first angle A, and second angle B described in this application refer to angles less than 180 degrees.

[0043] In an optional embodiment, the cleaning belt assembly 10 further includes a limiting mechanism 80, which is configured to limit the relative rotational limit of the first support member 50 and the second support member 60 so that the first angle A formed between the first support member 50 and the second support member 60 is the first angle. Thus, the limiting mechanism 80 can prevent the first support member 50 and the second support member 60 from further rotation. When the first support member 50 and the second support member 60 are limited by the limiting mechanism 80, the first angle A formed between the first support member 50 and the second support member 60 is the first angle, and the user does not need to confirm whether the angle is adjusted in other ways. Referring to Figures 3 to 8, in an optional embodiment, the limiting mechanism 80 includes a first limiting member 81, which is configured to limit the relative rotational limit of the first support member 50 and the second support member 60 so that the first angle A formed between the first support member 50 and the second support member 60 is the first angle. The endless belt 20 is elastic, and the endless belt 20 cooperates with the first limiting member 81 to maintain the first angle A at the first angle. Specifically, the elastic endless belt 20 is pressed against the first roller 30 and the second roller 40. The elastic restoring force of the endless belt 20 causes the first support member 50 and the second support member 60 to maintain the first angle A at the first angle. Specifically, the first stopper 81 is used to limit the rotation of the first support member 50 and / or the second support member 60 toward the first side 10a, while the endless belt 20 provides an elastic restoring force to prevent the first support member 50 and / or the second support member 60 from rotating toward the second side 10b. In the absence of external forces, a balanced state is achieved, maintaining the first angle A at the first angle.

[0044] In an optional embodiment, the first limit member 81 can be connected to the first support member 50 or the second support member 60. When the first support member 50 and the second support member 60 rotate relative to each other to the extreme position, the first support member 50 or the second support member 60 abuts against the first limit member 81. At this time, the first angle A is also the first angle.

[0045] Referring to Figures 3 to 8, in an optional embodiment, a first stopper 81 is disposed on one side of the first support member 50 and extends toward the first side 10a. When the second support member 60 abuts the first stopper 81, the first angle A formed by the first support member 50 and the second support member 60 is a first angle. Thus, when the first support member 50 and the second support member 60 rotate relative to each other toward the first side 10a, the first stopper 81 serves to limit the rotational limit. When the cleaning belt assembly 10 is performing a cleaning operation, the first side 10a is the side facing away from the surface to be cleaned, and the second side 10b is the side facing the surface to be cleaned. When the cleaning belt assembly 10 is dragged against the surface to be cleaned, pressure is generated on the surface to be cleaned. Because the first stopper 81 extends toward the first side 10a, the reaction force of the surface to be cleaned on the cleaning belt assembly 10 further tightens the second support member 60 against the first stopper 81, thereby providing a more stable structure.

[0046] 3 to 8 , in an optional embodiment, the limiting mechanism 80 further includes a second limiting member 82, which is used to limit the relative rotational limit of the first support member 50 and the second support member 60. In this optional embodiment, the second limiting member 82 is disposed on one side of the first support member 50 and extends toward the second side 10 b. When the second support member 60 abuts the second limiting member 82, the second angle B formed between the first support member 50 and the second support member 60 is a second angle. Thus, when the first support member 50 and the second support member 60 rotate relative to each other toward the second side 10 b, the second limiting member 82 is used to limit the relative rotational limit.

[0047] Referring to Figure 8, in an optional embodiment, a connecting arc portion 83 is further provided between the first limiting member 81 and the second limiting member 82, and the connecting arc portion 83 is respectively connected to the first limiting member 81 and the second limiting member 82. The first limiting member 81, the second limiting member 82, the connecting arc portion 83 and the first support member 50 are integrally formed. Therefore, the one-piece molding design can make the limiting of the first limiting member 81 and the second limiting member 82 more reliable, and can also make the structure of the cleaning belt component 10 simpler, reduce the connection structure, and avoid dust accumulation in the connecting gap.

[0048] Referring to Figure 7 , in an optional embodiment, the first support member 50 includes a first rotating portion 51, the second support member 60 includes a second rotating portion 61, and the rotating shaft 70 is sequentially disposed through the first rotating portion 51 and the second rotating portion 61. A first stopper 81 is located on the side of the second rotating portion 61 facing the first side 10a. When the first support member 50 and the second support member 60 rotate relative to each other, the first stopper 81, the connecting arc portion 83, and the second stopper 82 move along the outer wall of the second rotating portion 61. Specifically, referring to Figure 3 , after the first support member 50 and the second support member 60 are assembled, the first stopper 81 is located on the side of the second rotating portion 61 facing the first side 10a. When the first support member 50 and the second support member 60 rotate relative to each other, the first stopper 81, the connecting arc portion 83, and the second stopper 82 are equally spaced from the outer wall of the second rotating portion 61, with only a slight gap therebetween. As a result, the first support member 50 and the second support member 60 rotate more smoothly, avoiding shaking caused by excessive or uneven gaps. To improve cleaning efficiency, the cleaning belt assembly 10 can also be arranged longer along the axial direction of the rotating shaft 70, thereby ensuring that the endless belt 20 has a larger contact area with the surface to be cleaned, and the surface to be cleaned is more efficiently scrubbed. Referring to Figure 7, in an optional embodiment, the limiting mechanism 80 includes multiple first limiting members 81, the first support member 50 includes multiple first rotating parts 51, and the second support member 60 includes multiple second rotating parts 61. The multiple first rotating parts 51 and the multiple second rotating parts 61 are staggered along the axis of the rotating shaft 70, and the first limiting members 81 and the second rotating parts 61 are arranged correspondingly. With this structure, the cleaning belt assembly 10 can also be arranged longer along the axial direction of the rotating shaft 70, and the staggered arrangement of the first rotating parts 51 and the multiple second rotating parts 61 along the axis of the rotating shaft 70 also ensures smoother rotation of the first support member 50 and the second support member 60. Referring to Figure 12, in an optional embodiment, the limiting mechanism 80 may also include: a first limiting surface 84 provided on one end of the first support member 50 and proximate to the second support member 60, and a second limiting surface 85 provided on one end of the second support member 60 and proximate to the first support member 50. The first limiting surface 84 and the second limiting surface 85 cooperate to limit the relative rotational limit positions of the first support member 50 and the second support member 60, so that the first angle A formed by the first support member 50 and the second support member 60 is the first angle, and the first angle A is maintained at the first angle with the cooperation of the annular belt 20. Thus, when the first support member 50 and the second support member 60 rotate relative to each other to a predetermined position, the limiting mechanism can be achieved by the cooperation of the ends thereof, resulting in a simple structure and convenient use.

[0049] 13 , in an optional embodiment, the first limiting surface 84 includes a first free surface 841 and a first abutting surface 842. The first free surface 841 rotates relative to the second limiting surface 85, and the first abutting surface 842 is configured to abut against the second limiting surface 85 to limit the relative rotational limit of the first support member 50 and the second support member 60. The first free surface 841 includes a curved surface and / or an inclined surface, the first abutting surface 842 includes a flat surface, and the second limiting surface 85 includes a flat surface. When replacing the endless belt 20, the user adjusts the first support member 50 and / or the second support member 60 for relative rotation toward the second side 10b. Since the first free surface 841 is a curved surface or an inclined surface, or includes both a curved surface and an inclined surface, this structure allows the first support member 50 to rotate about the rotation axis 70 without interference from the second limiting surface 85, allowing the first free surface 841 to rotate freely about the rotation axis 70. When the second angle B formed between the first support member 50 and the second support member 60 is relatively small, the gap between the first roller news broadcast 30 and the second roller 40 is relatively narrow, and the endless belt 20 wrapped around the first roller 30 and the second roller 40 is in a loose state, allowing the user to easily remove the endless belt 20. In some examples, the second angle B formed by the relative rotation of the first support member 50 and the second support member 60 toward the second side 10b can be 90 degrees. In this case, the side surface of the first support member 50 facing the second side 10b can abut against the second limiting surface 85 of the second support member 60, thereby limiting the rotation angle toward the second side 10b.

[0050] In an alternative embodiment, the first abutting surface 842 is oriented toward the first side 10a, and the first free surface 841 is oriented toward the second side 10b. To tighten the endless belt 20, the user rotates the first support member 50 and / or the second support member 60 relative to the first side 10a. This rotation causes the first abutting surface 842 and the second limiting surface 85 to abut against each other. Because both the first abutting surface 842 and the second limiting surface 85 are planar, the two surfaces abut against each other. This planar structure ensures a more complete and stable abutment between the first and second limiting surfaces 842 and 85. The first and second support members 50 and 60 form a first angle A, which is a first angle. Furthermore, the elastic endless belt 20 abuts against the first roller 30 and the second roller 40. The elastic restoring force of the endless belt 20 causes the first support member 50 and the second support member 60 to maintain the first angle A at the first angle.

[0051] 13 , in an optional embodiment, the second limiting surface 85 includes a second free surface 851 and a second abutting surface 852. The second free surface 851 rotates relative to the first limiting surface 84, and the second abutting surface 852 is used to abut against the first limiting surface 84 to limit the relative rotational limit of the first support member 50 and the second support member 60. The second free surface 851 includes a curved surface and / or an inclined surface, the second abutting surface 852 includes a flat surface, and the first limiting surface 84 includes a flat surface. Thus, the second free surface 851 enables the first support member 50 and the second support member 60 to rotate freely toward the second side 10b, so that when the second included angle B formed between the first support member 50 and the second support member 60 is relatively small, the user can easily remove the endless belt 20. When the first support member 50 and the second support member 60 can rotate relative to each other toward the first side 10 a to the first angle A, the second abutting surface 852 abuts against the first limiting surface 84 , and the first angle A is at a first angle in cooperation with the annular belt 20 .

[0052] In an optional embodiment, the first limiting surface 84 includes a first free surface 841 and a first abutting surface 842, and the second limiting surface 85 includes a second free surface 851 and a second abutting surface 852. The first free surface 841 is rotatable relative to the second free surface 851, and the first abutting surface 842 and the second abutting surface 852 are capable of limiting the relative rotation of the first support member 50 and the second support member 60 to an extreme position. The first free surface 841 includes a curved surface and / or an inclined surface, the first abutting surface 842 includes a flat surface, the second free surface 851 includes a curved surface and / or an inclined surface, and the second abutting surface 852 includes a flat surface. When replacing the endless belt 20, the user adjusts the first support member 50 and / or the second support member 60 to rotate relative to each other toward the second side 10b. The structure of the first free surface 841 and the second free surface 851 enables the first support member 50 and / or the second support member 60 to freely rotate about the rotation axis 70. When the second angle B formed between the first support member 50 and the second support member 60 is relatively small, the endless belt 20 is in a relaxed state, allowing the user to easily remove the endless belt 20. To tighten the endless belt 20, the user adjusts the first support member 50 and / or the second support member 60 to rotate relative to each other toward the first side 10a. When the first abutting surface 842 and the second abutting surface 852 are rotated until they abut each other, since both the first abutting surface 842 and the second abutting surface 852 are planar, the two surfaces abut against each other. This planar structure ensures a more complete and stable abutment between the first abutting surface 842 and the second abutting surface 852. This results in the first angle A formed between the first support member 50 and the second support member 60 being the first angle. The elastic restoring force of the endless belt 20 maintains the first angle A at the first angle.

[0053] In an optional embodiment, the first support member 50 includes a first rotating portion 51, the second support member 60 includes a second rotating portion 61, and the rotating shaft 70 is sequentially disposed through the first rotating portion 51 and the second rotating portion 61. A first limiting surface 84 is disposed on the first rotating portion 51, and a second limiting surface 85 is disposed on the second rotating portion 61. Thus, when the first support member 50 and the second support member 60 are rotated relative to each other to the first included angle A, the first limiting surface 84 on the first rotating portion 51 and the second limiting surface 85 on the second rotating portion 61 cooperate with each other, and limiting is achieved at the rotation point, which is quick and convenient.

[0054] In an optional embodiment, the first angle may be greater than or equal to 160 degrees, and the second angle may be less than or equal to 150 degrees. In other embodiments, the first angle may be greater than or equal to 170 degrees, and the second angle may be less than or equal to 90 degrees.

[0055] In an optional embodiment, the axes of the rotating shaft 70, the first roller 30, and the second roller 40 are parallel to each other. Specifically, when the first support member 50 and the second support member 60 are rotated relative to each other to any angle, the axes of the rotating shaft 70, the first roller 30, and the second roller 40 are all parallel to each other.

[0056] Referring to Figures 9 and 10, in an alternative embodiment, a first plane 13 is formed between the axis of the first roller 30 and the axis of the rotating shaft 70, and the first plane 13 is located on the first support member 50. A second plane 14 is formed between the axis of the second roller 40 and the axis of the rotating shaft 70, and the second plane 14 is located on the second support member 60. The angle formed between the first plane 13 and the second plane 14, which is oriented toward the first side 10a, is referred to as a first angle A, and the angle formed between the first plane 13 and the second plane 14, which is oriented toward the second side 10b, is referred to as a second angle B. It will be understood that, due to the thickness of the first and second support members 50 and 60, the first angle A and second angle B described herein can be understood as the angles formed by the first plane 13 and the second plane 14, respectively, at the first and second sides 10a and 10b. In an alternative embodiment, the first angle formed by the first angle can be 175 degrees.

[0057] In an optional embodiment, the endless belt 20 includes an elastic base and a cleaning layer disposed on the elastic base, and the endless belt 20 is elastic. In some examples, the elastic base can be made of rubber, and the cleaning layer covering the surface of the elastic base can be cleaning fleece. When the first stopper 81 abuts the second support member 60, the endless belt 20 presses against the first roller 30 and the second roller 40. The elastic restoring force of the endless belt 20 forces the first support member 50 and the second support member 60 to maintain the first angle A at the first angle. Specifically, the first angle A can be less than 180 degrees. The elastic restoring force of the endless belt 20 can be transmitted to the first support member 50 and the second support member 60 via the first roller 30 and the second roller 40, thereby providing the first support member 50 and the second support member 60 with a force to continue to rotate relative to each other toward the first side 10a. Because the first stopper 81 limits the rotational limit of the first support member 50 and the second support member 60, the endless belt 20 can maintain the first angle A at the first angle under the cooperation of the first stopper 81.

[0058] In an alternative embodiment, the second roller 40 has a cavity, and the cleaning belt assembly 10 further includes a drive motor 90 housed within the cavity. The drive motor 90 is used to drive the second roller 40 to rotate. Specifically, the first roller 30 can be located diagonally above the second roller 40. When the cleaning belt assembly 10 is cleaning a surface, the second roller 40 presses the ring-shaped cleaning belt against the surface to be cleaned. Thus, by locating the drive motor 90 inside the second roller 40, not only can the downward pressure of the cleaning belt assembly 10 on the surface to be cleaned be maximized, enabling the cleaning belt assembly 10 to achieve a better cleaning effect on the floor, but the drive motor 90 can also be concealed, making the structure of the cleaning belt assembly 10 more compact and simple. Furthermore, the drive motor 90 and the second roller 40 can be configured as a single module for easier assembly. Furthermore, since the drive motor 90 needs to be located inside the second roller 40, the diameter of the second roller 40 needs to be larger, which improves the second roller 40's ability to overcome obstacles and clean larger pieces of trash.

[0059] With reference to Figure 14, in optional embodiment, cleaning belt component 10 also comprises support 94, drive motor 90 comprises body 91, first drive shaft 92 and second drive shaft 93, body 91 is installed in support 94, body 91 comprises relative first end and second end, first drive shaft 92 is located at the first end of body 91, second drive shaft 93 is located at the second end of body 91.The number of second rollers 40 is two, one of second rollers 40 is located at the first end of body 91 and is connected with the first drive shaft 92, another second roller 40 is located at the second end of body 91 and is connected with the second drive shaft 93, wherein body 91 can be connected with support 94.When cleaning belt component 10 works, drive motor 90 runs to drive first drive shaft 92 and second drive shaft 93 to rotate synchronously, and first drive shaft 92 and second drive shaft 93 respectively drive two second rollers 40 to rotate. Therefore, the two rollers 40 are located at opposite ends of the body 91, and the interaction force between the drive motor 90 and the two second rollers 40 is relatively balanced, so that the cleaning belt component 10 can operate stably, and the endless belt 20 can also better fit the surface to be cleaned, thereby achieving a better cleaning effect.

[0060] In an optional embodiment, the cleaning belt assembly 10 further includes a bracket 94, and the second roller 40 includes a third end and a fourth end opposite to each other. There are two drive motors 90, and the two drive motors 90 are respectively a first drive motor and a second drive motor. The first drive motor includes a first body and a third drive shaft, and the second drive motor includes a second body and a fourth drive shaft. The first body is connected to the bracket 94, the third drive shaft is connected to the third end of the second roller 40, the second body is connected to the bracket 94, and the fourth drive shaft is connected to the fourth end of the second roller 40. The first drive motor and the second drive motor synchronously drive the second roller 40 to rotate. Specifically, the first body and the bracket 94 remain stationary, and the second body and the bracket 94 remain stationary. During operation, the third drive shaft and the fourth drive shaft rotate, synchronously driving the second roller 40 to rotate. Therefore, the first body and the second body are located at opposite ends of the second roller 40, which can make the interaction force between the drive motor 90 and the second roller 40 relatively balanced, so that the cleaning belt component 10 can operate stably, and the annular belt 20 can also better fit the surface to be cleaned, thereby achieving a better cleaning effect.

[0061] Referring to Figures 1 to 3, in an alternative embodiment, the cleaning belt member 10 includes a first side 10a and a second side 10b opposite each other. The first support member 50 and the second support member 60 form an angle toward the first side 10a, which is a first angle A. When the first support member 50 and the second support member 60 rotate relative to each other until the first angle A reaches a third angle, the spacing between the first roller 30 and the second roller 40 is at the first spacing, thereby tensioning the endless belt 20. When the first support member 50 and the second support member 60 rotate relative to each other until the first angle A reaches a fourth angle, the spacing between the first roller 30 and the second roller 40 is less than the second spacing, thereby releasing the tension on the endless belt 20. The fourth angle is less than the third angle. Thus, the first support member 50 and the second support member 60 can tension or release the endless belt 20 by relative rotation about the first side 10a. Specifically, the tensioned or relaxed state of the endless belt 20 is determined by the first angle A. Since the fourth angle is smaller than the third angle, it can be understood that when the endless belt 20 is at the fourth angle, the distance between the first roller 30 and the second roller 40 is closer, and the endless belt 20 surrounding the first roller 30 and the second roller 40 is in a relaxed state, and the endless belt 20 can be removed and replaced; when the endless belt 20 is at the third angle, the distance between the first roller 30 and the second roller 40 is farther, and the endless belt 20 is in a tensioned state.

[0062] In an optional embodiment, the cleaning belt assembly 10 further includes a third stopper. When the first support member 50 and the second support member 60 rotate relative to each other until the first angle A is at a third angle, the third stopper is configured to secure the relative positions of the first support member 50 and the second support member 60. Thus, when the first angle A is at the third angle, the endless belt 20 is tensioned, and the third stopper secures the relative positions of the first support member 50 and the second support member 60, thereby maintaining the tension on the endless belt 20. In some examples, the third stopper may be a buckle; in other examples, depending on practical needs, the third stopper may also be another locking structure.

[0063] 7 , in an optional embodiment, the outer walls of the first support member 50 and the second support member 60 each have a plurality of grooves 15. Thus, the first support member 50 and the second support member 60 can be lighter, and can save more materials and reduce costs.

[0064] Referring to Figure 11, in an alternative embodiment, the cleaning belt member 10 includes a first side 10a and a second side 10b opposite each other. The outer walls of the first support member 50 and the second support member 60 each have a plurality of slots 16 extending from the first side 10a to the second side 10b. It can be understood that the first support member 50 and the second support member 60 only need to have a supporting frame. This makes the first support member 50 and the second support member 60 lighter, saves material, and reduces costs.

[0065] In an optional embodiment, the first support member 50 further includes a support portion 52, which is sleeved on the first roller 30. As a result, the cleaning belt member 10 is pressed down on the surface to be cleaned when it is dragged on the surface to be cleaned. The provision of the support portion 52 can strengthen the connection between the first support member 50 and the first roller 30, making the structure more stable and reliable.

[0066] Referring to Figures 3 to 6, in an optional embodiment, the cleaning belt assembly 10 further includes a first connecting frame 11, which is fixedly connected to the first support member 50 and rotatably connected to the first roller 30. The cleaning belt assembly 10 further includes a second connecting frame 12, which is fixedly connected to the second support member 60 and rotatably connected to the second roller 40. In some examples, the cleaning belt assembly 10 may include two first connecting frames 11, one connected to each end of the first roller 30 and correspondingly connected to either side of the first support member 50. The cleaning belt assembly 10 may include two second connecting frames 12, one connected to each end of the second roller 40 and correspondingly connected to either side of the second support member 60. Thus, the provision of the first connecting frame 11 can provide a more stable and reliable connection between the first roller 30 and the first support member 50, and the provision of the second connecting frame 12 can provide a more stable and reliable connection between the second roller 40 and the second support member 60.

[0067] The second aspect of the present application provides a cleaning device 100, which includes the cleaning belt assembly 10 as described above. Referring to Figure 16, in an optional embodiment, the cleaning device 100 includes the cleaning belt assembly 10 and a first cleaning auxiliary component 110. The first cleaning auxiliary component 110 is arranged behind the cleaning belt assembly 10 along the forward direction of the cleaning device 100. The first cleaning auxiliary component 110 is used to assist the endless belt 20 in cleaning garbage. Specifically, because the endless belt 20 is rotatably wrapped around the first roller 30 and the second roller 40, the endless belt 20 can carry garbage on the surface to be cleaned under the action of friction during rotation, and pick up and transport the garbage with the assistance of the first cleaning auxiliary component 110. As a result, the cleaning device 100 can better clean the surface to be cleaned more thoroughly, and the cleaning effect is better. The endless belt 20, which wraps around the first and second rollers 30 and 40, forms a conveying side for carrying waste. The first cleaning aid 110 has an inclined surface corresponding to the conveying side. Thus, the conveying side of the endless belt 20 and the inclined surface of the first cleaning aid 110 cooperate to clamp the waste. The rotating endless belt 20 can convey the waste even without wind. In some examples, the cleaning device 100 may also be equipped with a recovery container 150 for receiving waste conveyed by the endless belt 20 and the first cleaning aid 110.

[0068] It should be noted that the forward direction of the cleaning device 100 is the main direction of movement of the cleaning device 100 when working. If the cleaning device 100 is a handheld cleaning device 100 and the surface to be cleaned is the ground, the user needs to hold the cleaning device 100 and push the cleaning device 100 in the direction of the user's forward movement, then this direction is the forward direction of the cleaning device 100. In other embodiments, if the cleaning device 100 is a cleaning robot, then its forward direction is the main direction of movement of the cleaning robot. Referring to Figure 17, in an optional embodiment, the cleaning device 100 includes a cleaning belt component 10, a second cleaning auxiliary component 120 and a roller brush component 130. The second cleaning auxiliary component 120 is arranged behind the cleaning belt component 10 along the forward direction of the cleaning device 100, and the second cleaning auxiliary component 120 is used to assist the endless belt 1401 in cleaning garbage. The roller brush 130 is positioned behind the second cleaning auxiliary member 120. It is designed to perform at least one of the following functions: cleaning the surface to be cleaned, cooperating with the cleaning belt member 10 to transport waste, and scraping waste from the cleaning belt member 10. During operation, the rotating endless belt 20, through friction, adheres to waste on the surface to be cleaned and, in conjunction with the second cleaning auxiliary member 120 and the roller brush 130, picks up and transports the waste. The structure and operating principle of the second cleaning auxiliary member 120 are similar to those of the first cleaning auxiliary member 110 and will not be further described here. When the endless belt 20 transports waste to the end of the inclined surface of the second cleaning auxiliary member, the waste is transferred to the surface of the roller brush 130. The roller brush 130 then rolls, transporting the waste further into the recovery container 150. The surface of the rolling brush member 130 can be close to the conveying side of the endless belt 20. When the rotation direction of the rolling brush member 130 is the same as the rotation direction of the endless belt 20, the surface of the rolling brush member 130 close to the conveying side runs in the opposite direction of the conveying side. In this way, the rolling brush member 130 can also clean the garbage on the surface of the first endless belt to prevent the garbage from sticking to the surface of the endless belt 20.

[0069] Referring to Figure 18, in an optional embodiment, the cleaning device 100 includes a cleaning belt assembly 10 and a third cleaning auxiliary component 140. The third cleaning auxiliary component 140 is positioned behind the cleaning belt assembly 10 along the forward direction of the cleaning device 100. The cleaning auxiliary component 140 assists the endless belt 1401 in cleaning waste. The third cleaning auxiliary component 140 comprises an auxiliary endless belt 1401, a third roller 1402, and a fourth roller 1403. The auxiliary endless belt 1401 rotatably surrounds the third roller 1402 and the fourth roller 1403. As a result, the rotating endless belt 20 can adhere to waste on the surface to be cleaned due to frictional force during rotation. Furthermore, the third cleaning auxiliary component 140 can also pick up and transport waste with the assistance of the third cleaning auxiliary component 140. Specifically, the structure and operating principle of the third cleaning auxiliary component 140 are similar to those of the first cleaning auxiliary component 110 and will not be further described here. In addition, the auxiliary endless belt 1401 is rotatably wrapped around the third roller 1402 and the fourth roller 1403 . The auxiliary endless belt 1401 can also clean the surface to be cleaned and convey garbage under the action of friction.

[0070] In an optional embodiment, the cleaning belt assembly 10 is arranged at an angle relative to the surface to be cleaned, with the first roller 30 positioned obliquely above the second roller 40. The second roller 40 is heavier than the first roller 30 and has a larger diameter than the first roller 30. When the cleaning device 100 is in use, the second roller 40 presses the endless belt 20 against the surface to be cleaned. Since the diameter of the second roller 40 needs to be set relatively large, the obstacle-crossing ability of the second roller 40 can be improved, enabling the cleaning of larger waste. The greater weight of the second roller 40 also helps to press the endless belt 20 downward against the surface to be cleaned, resulting in greater friction when dragging the surface to be cleaned and a better cleaning effect.

[0071] Although the present application has been described in detail above with reference to the accompanying drawings and embodiments, it should be understood that the above description does not limit the present application in any form. Those skilled in the art may modify and change the present application as needed without departing from the spirit and scope of the present application, and such modifications and changes fall within the scope of the present application.

Claims

1. A cleaning belt component, characterized in that: The cleaning belt component includes an endless belt, a first roller, a second roller, a first support member and a second support member; The first roller and the second roller are spaced apart, and the endless belt is rotatably wrapped around the first roller and the second roller; The first roller is rotatably connected to the first support member, and the second roller is rotatably connected to the second support member. The first support member and the second support member are rotatably connected via a rotating shaft, and can adjust the angle between the first support member and the second support member by relative rotation, thereby adjusting the distance between the first roller and the second roller.

2. The cleaning belt member according to claim 1, characterized in that The cleaning belt member includes a first side and a second side that are opposite; The angle formed by the first support member and the second support member toward the first side is a first angle, and when the first support member and the second support member rotate relative to each other until the first angle reaches a first angle, the distance between the first roller and the second roller is at a first distance, so as to achieve tensioning of the endless belt; The angle formed by the first support member and the second support member toward the second side is a second angle, and when the first support member and the second support member rotate relative to each other until the second angle reaches a second angle, the distance between the first roller and the second roller is smaller than the second distance, so as to release the tension on the endless belt; Wherein, the second angle is smaller than the first angle.

3. The cleaning belt member according to claim 2, characterized in that The cleaning belt component further includes a limiting mechanism, which is used to limit the limit position of the relative rotation of the first supporting member and the second supporting member, so that a first angle formed by the first supporting member and the second supporting member is the first angle.

4. The cleaning belt member according to claim 3, characterized in that: The limiting mechanism comprises a first limiting member, and the first limiting member is used to limit the relative rotation limit position of the first supporting member and the second supporting member, so that the first angle formed by the first supporting member and the second supporting member is the first angle; Wherein, the annular belt cooperates with the first limiting member so that the first angle is at the first angle.

5. The cleaning belt member according to claim 4, characterized in that The first limiting member is disposed on one side of the first supporting member and extends toward the first side. When the second supporting member abuts against the first limiting member, a first angle formed by the first supporting member and the second supporting member is the first angle.

6. The cleaning belt member according to claim 5, characterized in that The limiting mechanism further includes a second limiting member, and the second limiting member is used to limit the relative rotation limit position of the first supporting member and the second supporting member.

7. The cleaning belt member according to claim 6, characterized in that The second limiting member is disposed on one side of the first supporting member and extends toward the second side. When the second supporting member abuts against the second limiting member, a second angle formed by the first supporting member and the second supporting member is the second angle.

8. The cleaning belt member according to claim 7, characterized in that: A connecting arc portion is further provided between the first limiting member and the second limiting member, and the connecting arc portion is respectively connected to the first limiting member and the second limiting member, and the first limiting member, the second limiting member, the connecting arc portion and the first supporting member are integrally formed.

9. The cleaning belt member according to claim 8, characterized in that: The first support member includes a first rotating part, the second support member includes a second rotating part, and the rotating shaft is sequentially arranged through the first rotating part and the second rotating part; The first limiting member is located on a side of the second rotating portion facing the first side. When the first supporting member and the second supporting member rotate relatively, the first limiting member, the connecting arc portion and the second limiting member move along the outer wall of the second rotating portion.

10. The cleaning belt member according to claim 9, wherein: The limiting mechanism includes a plurality of the first limiting members, the first supporting member includes a plurality of first rotating parts, and the second supporting member includes a plurality of second rotating parts; The plurality of first rotating parts and the plurality of second rotating parts are staggeredly distributed along the axial direction of the rotating shaft, and the first limiting member and the second rotating part are correspondingly arranged.

11. The cleaning belt member according to claim 3, characterized in that: The limiting mechanism comprises: a first limiting surface provided on the first supporting member and close to one end of the second supporting member; and A second limiting surface is arranged on the second support member and close to one end of the first support member; wherein the first limiting surface cooperates with the second limiting surface to limit the extreme position of the relative rotation of the first support member and the second support member, so that the first angle formed by the first support member and the second support member is the first angle, and with the cooperation of the annular belt, the first angle is at the first angle.

12. The cleaning belt member according to claim 11, wherein: The first limiting surface includes a first free surface and a first abutting surface, the first free surface rotates relative to the second limiting surface, and the first abutting surface is used to abut against the second limiting surface to limit the limit position of the relative rotation of the first support member and the second support member, wherein the first free surface includes a curved surface and / or an inclined surface, the first abutting surface includes a plane, and the second limiting surface includes a plane; and / or, The second limiting surface includes a second free surface and a second abutting surface, the second free surface rotates relative to the first limiting surface, and the second abutting surface is used to abut against the first limiting surface to limit the extreme position of the relative rotation of the first support member and the second support member, wherein the second free surface includes a curved surface and / or an inclined surface, the second abutting surface includes a plane, and the first limiting surface includes a plane.

13. The cleaning belt member according to claim 11, characterized in that The first support member includes a first rotating part, the second support member includes a second rotating part, and the rotating shaft is sequentially arranged through the first rotating part and the second rotating part; The first limiting surface is arranged on the first rotating part, and the second limiting surface is arranged on the second rotating part.

14. The cleaning belt member according to claim 2, wherein: The first angle is greater than or equal to 160 degrees; and / or The second angle is less than or equal to 150 degrees.

15. The cleaning belt member according to claim 14, characterized in that The axes of the rotating shaft, the first roller and the second roller are parallel to each other; and / or The first angle is greater than or equal to 170 degrees; and / or The second angle is less than or equal to 90 degrees.

16. The cleaning belt member according to claim 15, characterized in that A first plane is formed between the axis of the first roller and the axis of the rotating shaft, and the first plane is located on the first support member; a second plane is formed between the axis of the second roller and the axis of the rotating shaft, and the second plane is located on the second support member; An angle formed between the first plane and the second plane and directed toward the first side is the first angle; An angle formed between the first plane and the second plane and directed toward the second side is the second angle; and / or The first angle is 175 degrees.

17. The cleaning belt member according to claim 2, characterized in that: The endless belt includes an elastic base layer and a cleaning layer disposed on the elastic base layer.

18. The cleaning belt member according to claim 1, wherein: The second roller has a cavity, and the cleaning belt component further includes a driving motor built in the cavity, and the driving motor is used to drive the second roller to roll.

19. The cleaning belt member according to claim 18, wherein: The cleaning belt component further comprises a bracket, the driving motor comprises a body, a first driving shaft and a second driving shaft, the body is mounted on the bracket, the body comprises a first end and a second end opposite to each other, the first driving shaft is arranged at the first end of the body, and the second driving shaft is arranged at the second end of the body; There are two second rollers, one of which is located at the first end of the machine body and connected to the first drive shaft, and the other second roller is located at the second end of the machine body and connected to the second drive shaft.

20. The cleaning belt member according to claim 18, wherein The cleaning belt member further comprises a bracket, and the second roller comprises a third end and a fourth end opposite to each other; There are two drive motors, which are respectively a first drive motor and a second drive motor. The first drive motor includes a first body and a third drive shaft, and the second drive motor includes a second body and a fourth drive shaft. The first body is connected to the bracket, and the third drive shaft is connected to the third end of the second roller. The second body is connected to the bracket, and the fourth drive shaft is connected to the fourth end of the second roller. The first drive motor and the second drive motor synchronously drive the second roller to rotate.

21. The cleaning belt member according to claim 1, wherein: The cleaning belt component comprises a first side and a second side opposite to each other, and an angle formed by the first supporting member and the second supporting member toward the first side is a first angle; When the first support member and the second support member rotate relative to each other until the first angle reaches a third angle, the distance between the first roller and the second roller is at a first distance, so as to achieve tensioning of the endless belt; The first support member and the second support member rotate relative to each other so that when the first angle reaches a fourth angle, the distance between the first roller and the second roller is smaller than the second distance, so as to release the tension on the endless belt; Wherein, the fourth angle is smaller than the third angle.

22. The cleaning belt member according to claim 21, wherein: The cleaning belt component further includes a third limiting member, and when the first supporting member and the second supporting member rotate relative to each other until the first included angle is at the third angle, the third limiting member is used to fix the relative position of the first supporting member and the second supporting member.

23. The cleaning belt member according to claim 1, characterized in that The outer walls of the first supporting member and the second supporting member each have a plurality of grooves.

24. The cleaning belt member according to claim 1, wherein: The cleaning belt component comprises a first side and a second side opposite to each other. The outer walls of the first supporting member and the second supporting member each have a plurality of empty slots, and the empty slots penetrate from the first side to the second side.

25. A cleaning device, characterized in that: The cleaning belt member comprises the cleaning belt member according to any one of claims 1 to 24.

26. The cleaning device according to claim 25, characterized in that The first cleaning auxiliary component is provided behind the cleaning belt component along the advancing direction of the cleaning device, and is used for assisting the endless belt in cleaning garbage.

27. The cleaning device according to claim 25, characterized in that include: a second cleaning auxiliary member, the second cleaning auxiliary member being arranged behind the cleaning belt member along the advancing direction of the cleaning device, the second cleaning auxiliary member being used to assist the endless belt in cleaning garbage; A rolling brush member is arranged behind the second cleaning auxiliary member, and is used to perform at least one of the following functions: cleaning the surface to be cleaned, cooperating with the cleaning belt component to transport garbage, and scraping garbage on the cleaning belt component.

28. The cleaning device according to claim 25, characterized in that A third cleaning auxiliary member is provided behind the cleaning belt member along the advancing direction of the cleaning device, and the cleaning auxiliary member is used to assist the endless belt in cleaning garbage; The third cleaning auxiliary component includes an auxiliary endless belt, a third roller and a fourth roller, and the auxiliary endless belt is rotatably wrapped around the third roller and the fourth roller.

29. The cleaning device according to claim 25, characterized in that The cleaning belt component is arranged obliquely relative to the surface to be cleaned, the first roller is located obliquely above the second roller, the weight of the second roller is greater than that of the first roller, and the diameter of the second roller is greater than that of the first roller.

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