Roller brush mechanism, cleaning device and automatic cleaning system

Abstract

A roller brush mechanism, a cleaning device and an automatic cleaning system. A first roller brush (100) and a second roller brush (200) are provided, and the distance between the first roller brush (100) and the second roller brush (200) can be adjusted to adjust the cleanable range, thereby enabling the adjustment of the cleaning range on the basis of cleaning requirements. The roller brush mechanism comprises: a first roller brush (100) and a second roller brush (200) which are arranged side by side, wherein the first roller brush (100) is provided with a first end face (101), and the second roller brush (200) is provided with a second end face (201). The roller brush mechanism has an extended state and a retracted state, and at least one of the first roller brush (100) and the second roller brush (200) is configured to move along the rotational axis thereof under the drive of a first power mechanism, thereby enabling the roller brush mechanism to switch between the extended state and the retracted state; and the minimum distance between the first end face and the second end face along the rotational axis when in the retracted state is less than that when in the extended state.

Description

Roller brush mechanism, cleaning equipment and automatic cleaning system

[0001] This application claims priority to the Chinese patent application filed with the Patent Office of China on March 19, 2024, with application number 202410316148.X, and invention name “A roller brush mechanism, cleaning equipment and automatic cleaning system”, and the Chinese patent application filed with the Patent Office of China on March 19, 2024, with application number 202420536832.4, and invention name “A roller brush mechanism, cleaning equipment and automatic cleaning system”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present disclosure relates to the technical field of sweepers, and in particular to a roller brush mechanism, a cleaning device, and an automatic cleaning system. Background Art

[0003] The continuous development of intelligent cleaning technology, especially the increasing popularity of cleaning robots, has greatly improved daily cleaning tasks and has become increasingly popular among families. Cleaning robots typically integrate multiple functions, such as sweeping, mopping, environmental sensing, and obstacle avoidance. Sweeping is a particularly important and frequently used function for cleaning robots. Cleaning robots rotate a roller brush mounted below them, which contacts the ground and sweeps debris into the air vents for collection. Combined with the robot's movement, the brush can clean a wide area.

[0004] The inventors recognized that existing roller brushes are typically fixed in length and cannot be adjusted to suit changing cleaning environments. Consequently, cleaning narrow areas, such as the space between two carpets, requires a shorter roller brush. However, cleaning larger areas, such as the floor or edges near walls, requires a longer roller brush to cover a wider area. Fixed-length roller brushes cannot be adjusted to suit specific cleaning environments, limiting their applicability.

[0005] Application Contents

[0006] The present application provides a roller brush mechanism, a cleaning device and an automatic cleaning system. By setting a first roller brush and a second roller brush, the distance between the first roller brush and the second roller brush can be adjusted according to cleaning needs, and then the overall length and the cleaning range can be adjusted.

[0007] On the one hand, the present application provides a roller brush mechanism for a cleaning device, the cleaning device comprising a first power mechanism, wherein the roller brush mechanism comprises: a first roller brush (100) and a second roller brush (200) arranged side by side, the first roller brush (100) and the second roller brush (200) being used to clean a surface to be cleaned;

[0008] One end of the first roller brush (100) adjacent to the second roller brush (200) is provided with a first end surface (101), and one end of the second roller brush (200) adjacent to the first roller brush (100) is provided with a second end surface (201);

[0009] The roller brush mechanism comprises an extended state and a retracted state, and at least one of the first roller brush (100) and the second roller brush (200) is used to move along its own rotation axis under the drive of a first power mechanism, so that the roller brush mechanism switches between the extended state and the retracted state; wherein, when in the retracted state, the minimum distance between the first end face (101) and the second end face (201) in the rotation axis direction is smaller than the minimum distance between the first end face (101) and the second end face (201) in the rotation axis direction when in the extended state.

[0010] On the other hand, the present application also provides a cleaning device, comprising:

[0011] The cleaning device body, the power mechanism and the aforementioned roller brush mechanism;

[0012] The power mechanism is connected to the cleaning device body and the roller brush mechanism respectively, and is used to drive at least one of the first roller brush (100) and the second roller brush (200) to move, and to drive the first roller brush (100) and the second roller brush (200) to rotate synchronously around the rotation axis.

[0013] On the other hand, the present application also provides an automatic cleaning system, comprising:

[0014] base stations; and

[0015] The cleaning device of any of the aforementioned items is configured to selectively dock at a base station. Beneficial effects

[0016] The present application provides a roller brush mechanism, cleaning equipment, and automatic cleaning system. By providing a first roller brush and a second roller brush, the distance between the first roller brush and the second roller brush can be adjusted according to cleaning needs, thereby adjusting the overall length and the cleaning range. In the prior art, the length of the roller brush is usually fixed, and the length cannot be adjusted according to changes in the cleaning environment, resulting in the applicable cleaning environment of the roller brush being limited. Compared with the prior art, the roller brush mechanism of the present application includes a first roller brush and a second roller brush. The first roller brush and the second roller brush can be adjusted to move away from each other according to cleaning needs to increase the cleaning range that can be achieved by the first roller brush and the second roller brush as a whole. The first roller brush and the second roller brush can also be adjusted to move closer to each other according to cleaning needs to reduce the overall length of the first roller brush and the second roller brush, thereby adapting to embedded cleaning in narrow areas. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] FIG1 is a schematic structural diagram of a roller brush mechanism in a retracted state provided by an embodiment of the present application;

[0018] FIG2 is a schematic cross-sectional view of a roller brush mechanism provided in an embodiment of the present application in a retracted state at a first viewing angle;

[0019] FIG3 is a schematic cross-sectional view of a partial structure of a roller brush mechanism provided in an embodiment of the present application in a retracted state;

[0020] FIG4 is a structural schematic diagram of a roller brush mechanism provided by an embodiment of the present application in an extended state at a first viewing angle;

[0021] FIG5 is a structural schematic diagram of a roller brush mechanism provided by an embodiment of the present application in an extended state at a second viewing angle;

[0022] FIG6 is a schematic structural diagram of a partial structure of a roller brush mechanism provided in an embodiment of the present application in an extended state;

[0023] FIG7 is a schematic cross-sectional view of a roller brush mechanism provided in an embodiment of the present application in an extended state at a first viewing angle;

[0024] FIG8 is a partial enlarged schematic diagram of the roller brush mechanism shown in FIG7 ;

[0025] FIG9 is a schematic cross-sectional view of a roller brush mechanism provided in an embodiment of the present application in an extended state at a second viewing angle;

[0026] FIG10 is a schematic structural diagram of another roller brush mechanism provided in an embodiment of the present application in a retracted state;

[0027] FIG11 is a schematic cross-sectional view of another roller brush mechanism provided in an embodiment of the present application in a retracted state;

[0028] FIG12 is a partial enlarged schematic diagram of the roller brush mechanism shown in FIG11;

[0029] FIG13 is a schematic structural diagram of another roller brush mechanism provided in an embodiment of the present application in an extended state at a first viewing angle;

[0030] FIG14 is a schematic structural diagram of another roller brush mechanism provided in an embodiment of the present application in an extended state at a second viewing angle;

[0031] FIG15 is a schematic cross-sectional view of another roller brush mechanism provided in an embodiment of the present application in an extended state at a first viewing angle;

[0032] FIG16 is a schematic cross-sectional view of another roller brush mechanism provided in an embodiment of the present application in an extended state at a second viewing angle;

[0033] FIG17 is a schematic cross-sectional view of another roller brush mechanism in a retracted state provided in an embodiment of the present application;

[0034] FIG18 is a schematic cross-sectional view of another roller brush mechanism provided in an embodiment of the present application in an extended state.

[0035] Explanation of the reference numerals: first roller brush -100, first end face -101, first cutting groove -102, storage groove -103, second roller brush -200, second end face -201, roller brush shaft -300, guide tube -310, guide tube inner cavity -311, limiting surface -312, guide area -3111, make way area -3112, make way groove -313, guide rod -320, limiting member -330, extension rod -331, limiting cap -332, sealing assembly -340, intermediate sealing body -341, sealing ring -342, first bracket -350, second bracket -360, bracket body -361, sealing platform -362, roller brush inner cavity -363, end cover -370, protective member -400, second cutting groove -401, storage space -10, cutting member -500, elastic member -600. DETAILED DESCRIPTION

[0036] In the following description, a number of specific details are given to provide a more thorough understanding of the technical solutions provided by the present disclosure. However, it is obvious to those skilled in the art that the technical solutions provided by the present disclosure can be implemented without one or more of these details.

[0037] It should be noted that the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit exemplary embodiments according to the present disclosure. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of the features, wholes, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or combinations thereof.

[0038] Exemplary embodiments of the present disclosure will now be described in greater detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in a variety of different forms and should not be construed as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided to make the disclosure of this disclosure thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art.

[0039] In one aspect, as shown in Figure 1, the present application provides a roller brush mechanism for use in a cleaning device. The cleaning device can be an automatic cleaning device, also known as a sweeper, automatic cleaner, or cleaning robot. It can automatically perform functions such as movement, sweeping, vacuuming, and mopping, all without human intervention, through a main controller. The cleaning device can also be a handheld cleaning device. The cleaning device includes a device body. The outer contour of the device body can be of various shapes. To balance stability, suitability for various scenarios, such as cleaning under beds, and obstacle avoidance, the outer contour of the device body is typically a flattened cylindrical structure. A mounting space is provided on the chassis, and the roller brush mechanism is rotatably mounted within the mounting space, slightly protruding from the mounting space to contact the ground. A dust suction port is also provided on the chassis of the device body, located near the roller brush mechanism. The device body includes a drive mechanism, which is configured to at least drive the roller brush mechanism to rotate about a rotation axis. In one embodiment, the roller brush mechanism can be a wet cleaning mechanism in a cleaning device. Water is discharged from a water tank and a drainage structure to the roller brush mechanism, thereby wetting the roller brush mechanism and enhancing the cleaning effect. During the rotation of the roller brush mechanism, the roller brush mechanism will contact the ground and gather the garbage, especially the larger garbage, to the vicinity of the suction port. Then the cleaning device will suck the garbage near the suction port into the recycling box to complete the cleaning process.

[0040] Specifically, the cleaning device includes a first power mechanism, as shown in Figures 1-9, and the roller brush mechanism specifically includes: a first roller brush (100) and a second roller brush (200) arranged side by side, the first roller brush (100) and the second roller brush (200) being used to clean the surface to be cleaned;

[0041] One end of the first roller brush (100) adjacent to the second roller brush (200) is provided with a first end surface (101), and one end of the second roller brush (200) adjacent to the first roller brush (100) is provided with a second end surface (201);

[0042] The roller brush mechanism comprises an extended state and a retracted state, and at least one of the first roller brush (100) and the second roller brush (200) is used to move along its own rotation axis under the drive of a first power mechanism, so that the roller brush mechanism switches between the extended state and the retracted state; wherein, when in the retracted state, the minimum distance between the first end face (101) and the second end face (201) in the rotation axis direction is smaller than the minimum distance between the first end face (101) and the second end face (201) in the rotation axis direction when in the extended state.

[0043] The roller brush mechanism may include only two roller brushes, that is, only the first roller brush (100) and the second roller brush (200), or the roller brush mechanism includes at least two roller brushes, at least two roller brushes are coaxially arranged in parallel, the first roller brush (100) and the second roller brush (200) are adjacent roller brushes among the at least two roller brushes, and the number of roller brushes may be two, three, etc., which can be selected according to the required cleaning range and extension distance. The following is explained by taking the first roller brush (100) and the second roller brush (200) as an example. The first roller brush (100) and the second roller brush (200) can be roller brushes with exactly the same structure, or roller brushes with different structures, such as different axial lengths. The outer contours of the roller brushes are both approximately cylindrical, and the rotation axis of the roller brush is the central axis of the cylinder, which is also the rotation axis for the first power mechanism to drive the roller brush mechanism to rotate. The outer diameters of the first roller brush (100) and the second roller brush (200) are the same, or have only a slight difference, so that when the first roller brush (100) and the second roller brush (200) are coaxially arranged, they can abut the ground to the same extent and clean the ground. The rotation axes of the first roller brush (100) and the second roller brush (200) coincide and are arranged along the rotation axes. The first roller brush (100) and the second roller brush (200) refer to two adjacent roller brushes. Among the two adjacent roller brushes, either roller brush can serve as the first roller brush (100) and the other as the second roller brush (200). The first end face (101) can be provided only at one end of the first roller brush (100) relative to the second roller brush (200), or can be provided at opposite ends of the first roller brush (100). Take the first end face (101) and the second end face (201) as an example, which are the corresponding end faces of the first roller brush (100) and the second roller brush (200). The first end face (101) and the second end face (201) can be a single plane, or an arcuate surface, or an irregular surface, such as the first end face (101) is an inwardly concave V-shaped surface composed of two planes at an angle to each other, and the second end face (201) is an outwardly convex V-shaped surface adapted to the surface of the first end face (101). The first end face (101) can also be provided with a groove as needed.

[0044] When in the storage state, the minimum distance between the first end face (101) and the second end face (201) in the direction of the rotation axis is less than the minimum distance between the first end face (101) and the second end face (201) in the direction of the rotation axis when in the extended state, thereby achieving a change in the overall length of the first roller brush (100) and the second roller brush (200), and achieving length adjustment according to cleaning needs. The roller brush mechanism switches between the storage state and the extended state, and can be that the first roller brush (100) and the second roller brush (200) both move relative to the device body, or one of the first roller brush (100) and the second roller brush (200) moves relative to the device body, while the other is fixed to the device body. The first roller brush (100) and the second roller brush (200) can be connected to a power part respectively to be driven to rotate respectively, but it can be understood that the first roller brush (100) and the second roller brush (200) need to rotate synchronously. Alternatively, the first roller brush (100) and the second roller brush (200) may be connected via a roller brush shaft (300), and one of the first roller brush (100) and the second roller brush (200) may be connected to a power member, and rotational power is transmitted via the roller brush shaft (300), which will be described in detail below.

[0045] In addition, the structures of the first roller brush (100) and the second roller brush (200) can both be hollow structures to reduce weight. The first roller brush (100) and the second roller brush (200) can be soft-bristle brushes, rubber brushes, etc., and this application does not impose any restrictions.

[0046] The present invention provides a roller brush mechanism, cleaning equipment, and automatic cleaning system. By providing a first roller brush and a second roller brush, the distance between the first and second roller brushes can be adjusted according to cleaning needs, thereby adjusting the overall length and cleaning range. Furthermore, the bevel distance between the first and second bevel surfaces is greater than the extended distance, preventing any gaps between the first and second roller brushes. In the prior art, roller brushes are typically fixed in length and cannot be adjusted to suit changing cleaning environments, limiting their applicability to cleaning environments. Compared to the prior art, the present invention provides a roller brush mechanism comprising a first and second roller brush. The distance between the first and second roller brushes can be adjusted according to cleaning needs to increase the overall cleaning range of the first and second roller brushes. Furthermore, the bevel distance between the first and second bevel surfaces is greater than the extended distance between the first and second roller brushes. The synchronous rotation of the first and second roller brushes allows the cleaning areas of the first and second roller brushes to overlap or connect, preventing gaps from being cleaned due to the distance between the first and second roller brushes. The first roller brush and the second roller brush can also be adjusted closer to each other according to cleaning needs to reduce the overall length of the first roller brush and the second roller brush, thereby adapting to embedding and cleaning in narrow areas.

[0047] In one embodiment, when in the storage state, the minimum distance between the first end face (101) and the second end face (201) in the direction of the rotation axis is 0. In an embodiment in which the first end face (101) and the second end face (201) have matching surface shapes, when in the storage state, the first end face (101) and the second end face (201) may be in surface contact. In an embodiment in which the first end face (101) and the second end face (201) have mismatched surface shapes, the first end face (101) and the second end face (201) may be in partial contact. In an embodiment in which the first end face (101) and the second end face (201) have matching surface shapes, when in the extended state, the first end face (101) and the second end face (201) are separated, and the entire surface of the first end face (101) is separated from the entire surface of the second end face (201). In an embodiment in which the first end face (101) and the second end face (201) have mismatching surface shapes, the first end face (101) and the second end face (201) may be separated only partially.

[0048] At least one of the first end surface (101) and the second end surface (201) is an inclined surface, or in other words, at least one of the first end surface (101) and the second end surface (201) is tilted relative to the rotation axis, and the angle between the first end surface (101) and / or the second end surface (201) and the rotation axis is less than 90 degrees, so that the first end surface (101) and / or the second end surface (201) has a projection on the rotation axis. When the roller brush mechanism is in an extended state, the distance between the intersection of the first end surface (101) and the first rotation axis of the first roller brush (100) and the intersection of the second end surface (201) and the second rotation axis of the second roller brush (200) is less than or equal to the projection length of the inclined surface on the rotation axis of the roller brush.

[0049] Here, the projection refers to the projection perpendicular to the direction of the rotation axis. It can be understood that the rotation axis is a virtual line and the projection length on the rotation axis is a virtual length. However, when the first end face (101) and the second end face (201) are fixed, the projection length on the rotation axis is a fixed value, which can be used to guide the setting of the telescopic distance to achieve the problem of avoiding cleaning omissions in this application.

[0050] More specifically, when the length of the roller brush mechanism needs to be adjusted, the first roller brush (100) and the second roller brush (200) move away from each other. During this process, the projections of the first end face (101) and the second end face (201) on the rotation axis will move relatively until the roller brush mechanism is in an extended state. Since the distance between the intersection of the first end face (101) and the first rotation axis of the first roller brush (100) and the intersection of the second end face (201) and the second rotation axis of the second roller brush (200) is less than or equal to the projection length of the inclined surface on the rotation axis of the roller brush, that is, the distance between the first roller brush (100) and the second roller brush (200) moving away from each other is less than or equal to the maximum projection length of the first end face (101) or the second end face (201) on the rotation axis, the first roller brush (100) and the second roller brush (200) move away from each other. 0) and the second roller brush (200) rotate, the outer peripheral area rotation space of the first roller brush (100) corresponding to the first end face (101), and / or the outer peripheral area rotation space of the second roller brush (200) corresponding to the second end face (201) can cover the space between the first roller brush (100) and the second roller brush (200) that are far away from each other, and then when the extended state is achieved, the contact area between the first roller brush (100) and the ground and the contact area between the second roller brush (200) and the ground have an overlap or just connect, so that the first roller brush (100) and the second roller brush (200) are thoroughly cleaned, and the first roller brush (100) and the second roller brush (200) are prevented from separating from each other, resulting in cleaning omissions between the first roller brush (100) and the second roller brush (200).

[0051] In one embodiment, the first end surface (101) and the second end surface (201) are both inclined surfaces, and when the roller brush mechanism is in an extended state, the distance between the intersection of the first end surface (101) and the first rotation axis of the first roller brush (100) and the intersection of the second end surface (201) and the second rotation axis of the second roller brush (200) is less than or equal to the maximum length of the projection length of the first end surface (101) on the first rotation axis and the projection length of the second end surface (201) on the second rotation axis.

[0052] When both the first end surface (101) and the second end surface (201) are inclined surfaces, the three-dimensional area on the ground that contacts the first roller brush (100) and the area that contacts the second roller brush (200) will have overlapping parts, thereby achieving that the bottom surface corresponding to the space between the intersection of the first roller brush (100) and the first rotation axis of the first roller brush (100) and the intersection of the second roller brush (200) and the second rotation axis of the second roller brush (200) can be cleaned by the first roller brush (100) and the second roller brush (200) at the same time, thereby enhancing the cleaning efficiency.

[0053] In some embodiments, the first end surface (101) and the second end surface (201) have the same degree of inclination, are parallel to each other and are approximately elliptical surfaces, and have the same maximum projection lengths on the rotation axis as the first end surface (101) and the second end surface (201). When the roller brush mechanism is in the storage state, the first end surface (101) and the second end surface (201) are in contact with each other, so that the first roller brush (100) and the second roller brush (200) are docked. At this time, the projections of the first end surface (101) and the second end surface (201) on the rotation axis almost overlap.

[0054] In one embodiment, the roller brush mechanism includes a roller brush shaft (300), a first roller brush (100) and a second roller brush (200) are arranged axially along the roller brush shaft (300), and at least one of the first roller brush (100) and the second roller brush (200) is used to move along the extension direction of the roller brush shaft (300) under the drive of a first power mechanism, so that the roller brush mechanism switches between an extended state and a retracted state.

[0055] In an embodiment in which the first roller brush (100) and the second roller brush (200) are connected via a roller brush shaft (300), the roller brush shaft (300) is respectively connected to the first roller brush (100) and the second roller brush (200), the first roller brush (100) and the second roller brush (200) are circumferentially limited by the roller brush shaft (300), and one of the first roller brush (100) and the second roller brush (200) is used to rotate under the drive of a second power mechanism, so as to drive the other of the first roller brush (100) and the second roller brush (200) to rotate synchronously via the roller brush shaft (300).

[0056] The arrangement of the roller brush shaft (300) prevents the first roller brush (100) and the second roller brush (200) from being driven individually, which may lead to failure in complete synchronous rotation due to control error or mechanical error, resulting in relative movement of the first roller brush (100) and the second roller brush (200) in the circumferential direction. The arrangement of the roller brush shaft (300) can prevent angular deviation between the first end face (101) or the second end face (201), thus preventing the first roller brush (100) and the second roller brush (200) from being completely docked in the storage state. The roller brush shaft (300) stabilizes the relative position of the first roller brush (100) and the second roller brush (200) in the circumferential direction. The first power mechanism and the second power mechanism can act on the same roller brush, or the first power mechanism and the second power mechanism can act on different roller brushes respectively, that is, at least one of the first roller brush (100) and the second roller brush (200) is used to move along the extension direction of the roller brush shaft (300) under the drive of the first power mechanism, and the other of the first roller brush (100) and the second roller brush (200) is used to rotate under the drive of the second power mechanism.

[0057] In one embodiment, the roller brush shaft (300) includes a first connecting portion and a second connecting portion, the first connecting portion being connected to the first roller brush (100), and the second connecting portion being connected to the second roller brush (200), and at least one of the first connecting portion and the second connecting portion being used to move along its own rotation axis under the drive of the first power mechanism, so as to drive the first roller brush (100) and the second roller brush (200) to move closer to or farther from each other, thereby realizing the roller brush mechanism switching between a retracted state and an extended state, and the first connecting portion being connected to the fixed first roller brush (100), and the second connecting portion being fixedly connected to the second roller brush (200), thereby realizing a stable connection between the first roller brush (100) and the second roller brush (200) and the roller brush shaft (300), and the roller brush shaft (300) having not only a rotational transmission function but also a guiding auxiliary function for the relative movement of the first roller brush (100) and the second roller brush (200), making the telescopic control of the first roller brush (100) and the second roller brush (200) more convenient and accurate.

[0058] In one embodiment, the first connecting portion includes a guide tube (310) and a first bracket (350), the second connecting portion includes a guide rod (320) and a second bracket (360), the first roller brush (100) is arranged circumferentially along the first bracket (350), and the second roller brush (200) is arranged circumferentially along the second bracket (360). The first end of the guide tube (310) is connected to the first bracket (350), the guide tube (310) includes a guide tube inner cavity (311) that passes through the second end of the guide tube (310), and the second bracket (360) includes a roller brush inner cavity (363) that passes through the second end surface. The guide rod (320) is at least partially located in the roller brush inner cavity (363), and the guide rod (320) is connected to the second bracket (360). The guide tube (310) is inserted into the roller brush inner cavity (363), and the guide rod (320) is movably inserted into the guide tube inner cavity (311).

[0059] The guide tube (310) and the roller body of the first roller brush (100) can be integrally formed, and the guide tube inner cavity (311) is connected to the cavity of the first roller brush (100). The guide rod (320) and the roller body of the second roller brush (200) can be integrally formed. In one embodiment, the guide rod (320) is in sliding contact with the inner wall of the guide tube inner cavity (311) and interacts with the inner wall of the guide tube inner cavity (311) in the circumferential direction so that the guide rod (320) and the guide tube (310) are circumferentially limited. As shown in Figure 3, the guide rod (320) can be a square rod, and the inner wall of at least a part of the guide tube inner cavity (311) is a square hole that is compatible with the outer wall of the guide rod (320), so that the guide rod (320) can be in contact with the side wall of the guide tube inner cavity (311) and be circumferentially limited. The guide tube (310) can be in sliding contact with the inner wall of the roller brush cavity (363), or in sliding contact with other structures in the roller brush cavity (363), so that the guide tube (310) has better movement stability relative to the second roller brush (200).

[0060] Furthermore, the roller brush shaft (300) further includes at least one limiting member (330), and the limiting member (330) is used to limit the first connecting portion and the second connecting portion, or the extreme positions of the first roller brush (100) and the second roller brush (200) in the direction of the rotation axis.

[0061] In a first embodiment, the limiting member (330) is used to limit the extreme position in the extended state. Specifically, the limiting member (330) is connected to the guide rod (320). In the extended state, the limiting member (330) contacts the limiting surface (312) of the first bracket (350) to achieve axial limitation. In the retracted state, the limiting member (330) is separated from the limiting surface (312) of the first bracket (350). Alternatively, the limiting member (330) is connected to the guide rod (320). In the extended state, the limiting member (330) contacts the limiting surface (312) of the guide cylinder (310) to achieve axial limitation. In the retracted state, the limiting member (330) is separated from the limiting surface (312) of the guide cylinder (310).

[0062] The limiting member (330) may be one or more, and the limiting member (330) provided on the guide rod (320) is used to move relative to the first connecting portion and interact with the first connecting portion. The limiting process is specifically described below using the limiting member (330) as an example of a bolt-like shape:

[0063] As shown in Figures 2-3 and 7-8, the limiting member (330) includes an extension rod (331) and a limiting cap (332), wherein the first end of the extension rod (331) is connected to the guide rod (320), and the limiting cap (332) is arranged at the second end of the extension rod (331). The inner cavity (311) of the guide tube includes a guide area (3111) and a yield area (3112), wherein the guide area (3111) and the yield area (3112) are arranged in a direction away from the second bracket (360) and are adjacent to each other, and the connecting position of the guide area (3111) and the yield area (3112) forms a limiting surface (312), and the limiting cap (332) moves at least within the yield area (3112). When in the extended state, the limiting cap (332) contacts the limiting surface (312) for limiting, and when in the retracted state, the limiting member (330) is separated from the limiting surface (312). As shown in Figure 3, the radial cross-sectional area of ​​the limiting cap (332) is larger than that of the guide area (3111). The guiding area (3111) is a square hole that can be limited by the guide rod (320), and the giving area (3112) is a circular hole that is adapted to the shape of the limiting cap (332). The radial sizes of the guiding area (3111) and the giving area (3112) are different, so that a limiting surface (312) is formed between the guiding area (3111) and the giving area (3112). A threaded hole is provided at the end of the guide rod (320), and an external thread is provided on the side of the extension rod (331) opposite to the limiting cap (332), and the extension rod (331) is threadedly connected to the guide rod (320). In the stored state, as shown in FIG2 , the limiting cap (332) is away from the limiting surface (312). In the process of switching from the stored state to the extended state, the limiting cap (332) gradually approaches the limiting surface (312) until it abuts the limiting surface (312), as shown in FIG7-8 , thereby limiting the maximum distance between the first roller brush (100) and the second roller brush (200) and each other, that is, limiting the moving distance of the first roller brush (100) and the second roller brush (200) when switching from the stored state to the extended state, thereby avoiding omissions in cleaning between the first roller brush (100) and the second roller brush (200) due to an error in the moving distance.

[0064] In a second embodiment, the limiting member (330) can also be used to limit the extreme position in the storage state. Specifically, as shown in Figures 17-18, the limiting member (330) is connected to the guide rod (320). When in the storage state, the limiting member (330) contacts the limiting surface (312) of the first bracket (350) to achieve axial limitation. When in the extended state, the limiting member (330) is separated from the limiting surface (312) of the first bracket (350). Alternatively, the limiting member (330) is connected to the guide rod (320). When in the storage state, the limiting member (330) contacts the limiting surface (312) of the guide cylinder (310) to achieve axial limitation. When in the extended state, the limiting member (330) is separated from the limiting surface (312) of the guide cylinder (310).

[0065] The above-mentioned limiting surface (312) can be the limiting surface (312) formed by two areas of different inner diameters in the first embodiment, or, as shown in Figure 18, a separate abutment (351) can be provided protruding from the inner wall of the first bracket (350) or the interior of the guide cylinder (310). The limiting surface (312) refers to a side wall on the abutment (351). The limiting surface (312) can be a whole surface or only a point or one end. As shown in Figure 18, the limiting member (330) includes an extension rod (331) and a limiting cap (332). The specific structure can refer to the first embodiment. The abutment (351) can be a bolt screwed on the first bracket (350) and protruding from the inner wall of the first bracket (350). When in the retracted state, the limiting cap (332) contacts the abutment member (351) to achieve axial limiting, and when in the extended state, the limiting cap (332) is disengaged from the abutment member (351), thereby preventing the first connecting portion and the second connecting portion from being squeezed too much against each other in the retracted state.

[0066] In one embodiment, the roller brush shaft (300) further includes a sealing assembly (340), the sealing assembly (340) being located in the roller brush inner cavity (363), and the sealing assembly (340) being located between the guide tube (310) and the inner wall of the roller brush inner cavity (363). The sealing assembly (340) is fixedly connected to the inner wall of the roller brush inner cavity (363), and the sealing assembly (340) is in sliding contact with the outer wall of the guide tube (310), or the sealing assembly (340) is in sliding contact with the inner wall of the roller brush inner cavity (363), and the sealing assembly (340) is fixedly connected to the outer wall of the guide tube (310).

[0067] By arranging the sealing component (340) between the guide tube (310) and the inner wall of the roller brush inner cavity (363), the problem of gaps or impurities easily entering and causing unsmooth movement when the guide tube (310) and the inner wall of the roller brush inner cavity (363) are directly slidably abutted is avoided. The sealing component (340) can be bonded to the inner wall of the roller brush inner cavity (363) or the outer wall of the guide tube (310), or fixed by clamping.

[0068] In one embodiment, the sealing assembly (340) is fixedly connected to the inner wall of the roller brush cavity (363), the second roller brush (200) includes a bracket body (361) and a sealing platform (362), the roller brush mechanism further includes a protective member (400), the bracket body (361) includes the roller brush cavity (363), and the sealing platform (362) and the protective member (400) are spaced apart in the roller brush cavity (363). The sealing platform (362) is located in the roller brush cavity (363), the sealing platform (362) is connected to the inner wall of the roller brush cavity (363), the protective member (400) is at least partially located in the roller brush cavity (363), and is detachably connected to the second roller brush (200), and the protective member (400) is spaced apart from the sealing platform (362). The guide tube (310) slides against the sealing platform (362) and the protective member (400). The sealing assembly (340) is located between the sealing platform (362) and the protective member (400).

[0069] The sealing platform (362) is an annular surface in the roller brush inner cavity (363). The protective member (400) is detachably connected to the second roller brush (200), which makes it easy to install and replace the sealing assembly (340) and prevents the sealing assembly (340) from easily falling off due to adhesion. The following is a detailed description of the structure of a specific sealing assembly (340): the sealing assembly (340) includes an intermediate sealing body (341) and two sealing rings (342). The intermediate sealing body (341) is located between the sealing platform (362) and the protective member (400), and its two ends are respectively in contact with the sealing platform (362) and the protective member (400). One of the two sealing rings (342) is located between the intermediate sealing body (341) and the sealing platform (362), and the other of the two sealing rings (342) is located between the intermediate sealing body (341) and the sealing platform (362). The middle sealing body (341) and the two sealing rings (342) are in sliding contact with the guide sleeve (310).

[0070] During installation, the protective member (400), the sealing ring (342) and the intermediate sealing body (341) are first placed on the guide tube (310) in sequence, and then inserted into the roller brush inner cavity (363). The sealing ring (342) abuts against the sealing platform (362). Then, the protective member (400) is pushed toward the sealing platform (362) until the protective member (400) is connected to the second roller brush (200), and the sealing ring (342) and the intermediate sealing body (341) are squeezed, so that an effective seal is obtained between the guide tube (310) and the roller brush inner cavity (363). A clamping groove can be provided on the inner wall of the roller brush inner cavity (363), and a clamping joint matching the clamping groove is provided on the protective member (400). The protective member (400) and the second roller brush (200) are detachably clamped.

[0071] When the roller brush mechanism includes a roller brush shaft (300), during the process of the roller brush mechanism rotating and cleaning, some longer debris, such as hair, will be rolled up by the roller brush shaft (300) area between the first end face (101) and the second end face (201), and will be wound around the roller brush shaft (300), more specifically, around the outer periphery of the guide tube (310), resulting in the first roller brush (100) and the second roller brush (200) being blocked by the hair when they approach each other and unable to completely dock in the stored state.

[0072] In order to clean the hair wrapped around the outer periphery of the guide tube (310), in one embodiment, when the roller brush mechanism is in an extended state, the roller brush mechanism includes a storage space (10). The outer diameter of the area of ​​the roller brush shaft (300) located between the first end surface (101) and the second end surface (201) is smaller than the outer diameters of the first roller brush (100) and the second roller brush (200), and the first end surface (101), the second end surface (201) and the roller brush shaft (300) enclose at least a portion of the storage space (10). The roller brush mechanism also includes at least one cutting member (500), the cutting member (500) being connected to at least one of the first connecting portion and the second connecting portion, and the cutting end of the cutting member (500) being located in the storage space (10), and the cutting member (500) being used at least for moving and cutting obstacles located in the storage space (10) when the roller brush mechanism switches from the extended state to the stored state.

[0073] The outer diameter of the guide tube (310) is smaller than the outer diameters of the first roller brush (100) and the second roller brush (200), so that a partial storage space (10) is enclosed between the first end face (101), the second end face (201), the end faces of the first connecting portion and the second connecting portion facing each other, and the outer wall of the guide tube (310). The hair wrapped around the outer periphery of the guide tube (310) is located in the storage space (10). There can be multiple cutting pieces (500), such as a cutting piece (500) is respectively provided on the outer sides of the guide tube (310) on both radial sides. The cutting piece (500) can be a blade. The cutting piece (500) can be provided on the first connecting portion, with the cutting end aligned with the first bracket (350) of the second connecting portion, or it can be provided on the second connecting portion, with the cutting end aligned with the second bracket (360) of the first connecting portion. In some other embodiments, the cutting member (500) can also be connected to the first roller brush (100) or the second roller brush (200), such as being connected to the first end surface (101) or the second end surface (201), or can also be connected to the edge or side wall of the first roller brush (100) or the second roller brush (200), so that the cutting end is located in the storage space (10) and can be moved to cut hair. The cutting member (500) can move to cut or not. However, there is a relative displacement between the cutting member (500) and the obstacle. When the cutting member (500) moves relative to the first connecting portion following the second connecting portion, the obstacle is wrapped around the guide tube (310), while the guide tube (310) does not move, so that the cutting member (500) and the obstacle have relative movement, thereby achieving cutting the obstacle while moving. Alternatively, when the cutting member (500) follows the first connection portion and moves relative to the second connection portion, obstacles wound around the guide tube (310) will be blocked by the second connection portion and gradually converge toward the cutting member (500). When the cutting member (500) reaches a certain position, the cutting member (500) will cut the obstacle. If the cutting member (500) is stationary, the obstacles will still converge toward the cutting member (500) due to the reduction of the storage space (10). When the storage space (10) is reduced to a certain extent, the cutting member (500) will cut the obstacle. The obstacle can be hair or any other debris located in the storage space (10), such as earphone wires, straps, etc.

[0074] In order to enable the cutting member (500) to more effectively cut the obstruction and make it fall off, the cutting member (500) can cooperate with the groove so that the obstruction is subjected to a small range of reverse force, and the force applied by the cutting end is sufficient to cut the obstruction. The following examples illustrate two specific configurations of the cutting member (500). It is understood that the configuration of the cutting member (500) is not limited to the following embodiments:

[0075] First, as shown in FIG1-9, the cutting end of the cutting member (500) protrudes from the end surface of the second connecting portion on the side opposite to the first connecting portion, and a first cutting groove (102) axially opposite to the cutting member (500) is provided on the end surface of the first connecting portion on the side opposite to the second connecting portion; and / or, the cutting end of the cutting member (500) protrudes from the end surface of the first connecting portion on the side opposite to the second connecting portion, and a first cutting groove (102) axially opposite to the cutting member (500) is provided on the end surface of the second connecting portion on the side opposite to the first connecting portion. The first cutting groove (102) constitutes at least a portion of the storage space (10), and when the roller brush mechanism is in the storage state, at least the cutting end is embedded in the first cutting groove (102).

[0076] For example, a cutting member (500) is connected to a second connecting portion, and the cutting end of the cutting member (500) protrudes from the end face of the second connecting portion relative to the first connecting portion, and a first cutting groove (102) is provided on the end face of the first connecting portion relative to the second connecting portion. During the process of switching the roller brush mechanism from the extended state to the retracted state, the cutting member (500) will move toward the end face of the first connecting portion relative to the second connecting portion, or in other words, the cutting member (500) will push the obstacles in the retracted space (10) toward the first cutting groove (102). During the process of pushing the obstacles to move, some of the obstacles that are easier to cut will be cut off, while the other part will be pushed to the first cutting groove (102). The edge of the first cutting groove (102) will restrict the continued movement of the obstacles. Under the reverse force of the cutting member (500) and the edge of the first cutting groove (102), the cutting force on the obstacles will increase, and then they will be cut off. The first cutting groove (102) also has the function of giving way to the cutting member (500).

[0077] Furthermore, in an embodiment where the roller brush mechanism further includes a protective member (400), the protective member (400) is used not only to fix the sealing assembly (340), but also to shield the cutting member (500) at the periphery of the cutting member (500), thereby avoiding the risk of the cutting member (500) being exposed and easily touched by mistake. Specifically, the protective member (400) is connected to the first connecting member and / or the second connecting portion, the cutting member (500) is fixed to the protective member (400), the end of the protective member (400) is higher than the cutting end of the cutting member (500), and in the stored state, the end of the protective member (400) and the cutting end of the cutting member (500) are both embedded in the first cutting groove (102).

[0078] The protective member (400) is annular, with its first axial end extending into the roller brush inner cavity (363). The protective member (400) is provided with two approximately plate-shaped protrusions, the top ends of which constitute the second end of the protective member (400). The protrusions are located outside the two cutting members (500), and the height of the second end protruding from the first connecting member and / or the second connecting portion is greater than the protruding height of the cutting member (500), thereby shielding the connecting end of the cutting member (500) to prevent accidental collision and injury.

[0079] Secondly, as shown in Figures 10-16, the roller brush mechanism further includes a protective member (400), one of the first connecting portion and the second connecting portion is provided with the protective member (400), and the other of the first connecting portion and the second connecting portion is provided with a cutting member (500). The protective member (400) is provided with a second cutting groove (401) axially opposite to the cutting member (500), and the second cutting groove (401) constitutes a partial area of ​​the storage space (10). In the storage state, the cutting member (500) is partially embedded in the second cutting groove (401).

[0080] A receiving groove (103) is provided on the first connecting portion, the cutting member (500) is connected to the first connecting portion, and the protective member (400) is connected to the second connecting portion. The receiving groove (103) is an annular receiving groove, and the protective member (400) is an annular protective member, and both protrude circumferentially from the end face of the second connecting portion relative to the first connecting portion. When the roller brush mechanism switches from the extended state to the retracted state, the protective member (400) will move toward the first connecting portion, or in other words, the protective member (400) will push the obstacles in the receiving space (10) toward the receiving groove (103), and the obstacles will be gradually concentrated and interact with the cutting member (500) in the receiving groove (103). The edge of the second cutting groove (401) will continue to push the obstacles to move relative to the cutting member (500). Under the reverse force of the cutting member (500) and the edge of the second cutting groove (401), the cutting force on the obstacles will increase, and then they will be cut off. The second cutting groove (401) also has a function of giving way to the cutting piece (500), while the groove wall of the receiving groove (103) has a function of shielding the cutting piece (500), thereby preventing the cutting piece (500) from being exposed and easily touched by mistake.

[0081] In one embodiment, hair and the like may be wrapped around the guide tube (310) and may be wrapped closely against the side wall of the guide tube (310), and the cutting member (500) and the guide tube (310) need to move relative to each other, resulting in a gap between the cutting member (500) and the side wall of the guide tube (310). Hair can easily get stuck in the gap, resulting in missed cutting, which affects the relative movement smoothness between the first roller brush (100) and the second roller brush (200). To solve the above problem, in one embodiment, as shown in FIG6 , a clearance groove (313) is provided on the roller brush shaft (300), specifically, a clearance groove (313) is provided on the outer wall of the guide tube (310). The clearance groove (313) extends in the direction of the rotation axis, and the clearance groove (313) corresponds to the cutting member (500). The cutting end of the cutting member (500) is located in both the receiving space (10) and the clearance groove (313). When the cutting member (500) is a blade, the blade tip extends from the outside of the clearance groove (313) to the inside of the clearance groove (313). When the roller brush mechanism switches from the extended state to the stored state, the cutting member (500) moves along the clearance groove (313), and the blade tip cuts obstacles at the opening of the clearance groove (313). Even if the obstacles are tightly attached to the winding guide tube (310), they can still be effectively cut.

[0082] In one embodiment, the roller brush mechanism further includes an elastic member (600), which can be used to apply an elastic force to the first connection portion and the second connection portion so that the first connection portion and the second connection portion move away from each other, or the elastic member (600) can be used to apply an elastic force to the first connection portion and the second connection portion so that the first connection portion and the second connection portion move closer to each other. These two embodiments are described in detail below.

[0083] In a first embodiment, the elastic member (600) is directly or indirectly connected to at least one of the first connection portion and the second connection portion, and when the roller brush mechanism switches from the extended state to the retracted state, the elastic member (600) stores energy. When the roller brush mechanism switches from the retracted state to the extended state, the elastic member (600) releases the stored energy.

[0084] The elastic member (600) is used to apply an elastic force that causes the first roller brush (100) and the second roller brush (200), or the first connecting part and the second connecting part, to move away from each other, so that the first connecting part and the second connecting part move away from each other and switch to the extended state. The elastic member (600) can increase the smoothness when switching from the storage state to the extended state. If a telescopic motor is used, the output end of the telescopic motor abuts the end of the first connecting part and applies a force toward the second connecting part. When the extended state is switched to the storage state, the output end of the telescopic motor moves in a direction close to the second connecting part, thereby causing the elastic member (600) to compress and store energy. When the storage state is switched to the extended state, the output end of the telescopic motor retracts in a direction away from the second connecting part, and the first connecting part will follow the output end to move away from the second connecting part under the action of the elastic member (600). The power mechanism is described in more detail below.

[0085] In a more specific embodiment, such as in an embodiment in which the first connecting portion includes a guide tube (310) and a first bracket (350), and the second connecting portion includes a guide rod (320) and a second bracket (360), the elastic member (600) can be disposed in the roller brush cavity (363) and located between the bottom wall of the roller brush cavity (363) and the guide tube (310), and then when the guide tube (310) moves relative to the roller brush cavity (363), the elastic member (600) is compressed to varying degrees. In this embodiment, the limiting member (330) is used to limit the extreme position in the extended state, that is, in the extended state, the limiting member (330) contacts the first bracket (350) or the guide tube (310) to achieve axial limitation.

[0086] In the second embodiment, as shown in Figures 17-18, the elastic member (600) is directly or indirectly connected to at least one of the first connecting portion and the second connecting portion. When the roller brush mechanism switches from the storage state to the extended state, the elastic member (600) stores energy, and when the extended state switches to the storage state, the elastic member (600) releases the stored energy.

[0087] The elastic member (600) is used to apply an elastic force that causes the first roller brush (100) and the second roller brush (200), or the first connecting portion and the second connecting portion, to move closer to each other, so that the first connecting portion and the second connecting portion are closer and switched to the storage state. The elastic member (600) can achieve increased stability in the storage state. If a telescopic motor is used, the output end of the telescopic motor is fixed to the end of the first connecting portion and applies a force toward the second connecting portion. When the extended state is switched to the storage state, the output end of the telescopic motor moves in a direction close to the second connecting portion, thereby causing the elastic member (600) to release energy. At this time, the reaction force of the elastic member (600) on the telescopic motor is small, thereby preventing the telescopic motor from being damaged by being under a large load for a long time. When the storage state is switched to the extended state, the output end of the telescopic motor retracts in a direction away from the second connecting portion, and the elastic member (600) is stretched to store energy.

[0088] In a more specific embodiment, if the first connecting portion includes a guide cylinder (310) and a first bracket (350), and the second connecting portion includes a guide rod (320) and a second bracket (360), the elastic member (600) can be arranged between the guide rod (320) and the guide cylinder (310), or between the guide rod (320) and the first bracket (350), and the elastic member (600) can be a tensile energy storage or a compressive energy storage. Furthermore, in an embodiment in which the limiting member (330) includes an extension rod (331) and a limiting cap (332), the elastic member (600) can be arranged between the limiting cap (332) and the limiting surface (312) of the guide cylinder (310), and when the guide rod (320) moves relative to the guide cylinder (310), the elastic member (600) is compressed to varying degrees. The elastic member (600) applies an elastic force to the limiting cap (332) to move away from the second bracket (360), thereby causing the first connecting portion and the second connecting portion to approach each other until they are in the storage position. In this embodiment, the limiting member (330) is used to limit the extreme position in the storage state. As shown in Figures 17-18, when in the storage state, the limiting member (330) contacts the limiting surface (312) of the first bracket (350) or the guide cylinder (310) to achieve axial limitation, or the limiting cap (332) contacts the abutment member (351), thereby limiting the position.

[0089] On the other hand, the present application also provides a cleaning device, comprising: a cleaning device body, a power mechanism, and a roller brush mechanism as described above. The power mechanism is connected to the cleaning device body and the roller brush mechanism respectively, and is used to drive at least one of the first roller brush (100) and the second roller brush (200) to move along the rotation axis, and to drive the first roller brush (100) and the second roller brush (200) to rotate synchronously around the rotation axis.

[0090] The cleaning device includes any of the aforementioned roller brush mechanisms, including the advantages of any of the roller brush mechanisms, which will not be described in detail here. The following examples illustrate two specific implementations of the power mechanism:

[0091] First, the power mechanism includes a first rotary drive member, a second rotary drive member, and a position drive member. The first rotary drive member and the second rotary drive member are respectively connected to the first roller brush (100) and the second roller brush (200), and are used to drive the first roller brush (100) and the second roller brush (200) to rotate synchronously around the axis. The position drive member is connected to at least one of the first roller brush (100) and the second roller brush (200) to drive at least one of the first roller brush (100) and the second roller brush (200) to move relative to each other along the axis.

[0092] In an embodiment where the first roller brush (100) and the second roller brush (200) are two independent roller brushes and there is no roller brush shaft (300) between them, the first roller brush (100) and the second roller brush (200) need to be driven to rotate separately. The first rotation drive member and the second rotation drive member can be the same drive motor, which can synchronously drive the first roller brush (100) and the second roller brush (200) to rotate. There can be one or two position drive members, and a single position drive member can drive either the first roller brush (100) or the second roller brush (200) to move axially relative to the other. If the position of the second roller brush (200) is fixed relative to the main body of the cleaning device, the position drive member drives the first roller brush (100) and the first rotation drive member corresponding to the movement of the first roller brush (100) to move relative to the main body of the cleaning device, thereby realizing the switching between the storage state and the extended state.

[0093] Secondly, the power mechanism includes a rotation drive member and a position drive member. The rotation drive member is connected to the first roller brush (100) and the second roller brush (200), or one of the first connecting part and the second connecting part. The rotation drive member is used to drive the first roller brush (100) and the second roller brush (200), or one of the first connecting part and the second connecting part to rotate, so as to drive the other of the first roller brush (100) and the second roller brush (200) to rotate synchronously through the roller brush shaft (300) of the roller brush mechanism. The position drive member is connected to the other of the first roller brush (100) and the second roller brush (200) to drive the other of the first roller brush (100) and the second roller brush (200) to move relative to each other along the direction of the rotation axis.

[0094] In an embodiment in which the first roller brush (100) and the second roller brush (200) are connected via a roller brush shaft (300), only one of the first roller brush (100) and the second roller brush (200), or the first connecting portion and the second connecting portion, needs to be driven to rotate. This can avoid rotation errors caused by individual driving, and avoid the driving burden of the position driving portion caused by the need for the rotation driving member to move. Specifically, the rotation driving member is connected to the second roller brush (200) or the second connecting portion, and is used to drive the second roller brush (200) to rotate. The second roller brush (200) then drives the first roller brush (100) to rotate through the circumferential limit of the roller brush shaft (300). There is one position driving member, which is connected to the first roller brush (100) or the first connecting portion, and is used to drive the first roller brush (100) to move axially relative to the second roller brush (200), while the positions of the second roller brush (200) and the rotation driving member remain stationary relative to the cleaning device body. In the embodiment in which the roller brush mechanism includes an elastic member (600), the position driving member can be a telescopic motor, the output end of the telescopic motor is slidably plugged into the first roller brush (100) or the end of the first connecting portion, so that the first roller brush (100) can rotate relative to the output end of the telescopic motor, and the output end of the telescopic motor is used to apply a force to the first roller brush (100) toward the second roller brush (200). When the storage state is switched to the extended state, the output end of the telescopic motor retracts in a direction away from the second roller brush (200), and the first roller brush (100) moves away from the first roller brush (100) following the output end under the action of the elastic member (600). When the extended state is switched to the storage state, the output end of the telescopic motor extends toward the second roller brush (200), realizing state switching, making the movement of the first roller brush (100) easier, and thus simplifying the power mechanism.

[0095] In one embodiment, the roller brush mechanism further comprises a matching piece, the matching piece is connected to the roller brush shaft (300), and the matching piece is used to connect to the power mechanism.

[0096] The matching piece may be a structure that can be driven by a power mechanism, thereby driving the first connecting portion and the second connecting portion to extend and retract relative to each other.

[0097] In one embodiment, as shown in FIG1-2 , the roller brush shaft (300) includes an end opening, the roller brush shaft (300) includes an end cap (370), the end cap (370) is connected to the roller brush shaft (300) through the end opening, and the mating piece is connected to the end cap (370). This facilitates processing of the roller brush shaft (300), allows the end cap (370) to be processed separately according to the structural characteristics of the mating piece, and allows different end caps (370) to be replaced to accommodate different mating pieces.

[0098] On the other hand, the present application also provides an automatic cleaning system, comprising: a base station; and any one of the aforementioned cleaning devices, the cleaning device being configured to selectively dock at the base station.

[0099] The base station includes a docking space, and the cleaning device can be selectively docked in the docking space for charging, cleaning, replacing cleaning parts, etc. The automatic cleaning system includes any of the above cleaning devices, including the advantages of any of the cleaning devices, which will not be repeated here.

[0100] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A roller brush mechanism for a cleaning device, the cleaning device comprising a first power mechanism, wherein: The roller brush mechanism comprises: a first roller brush (100) and a second roller brush (200) arranged side by side, wherein the first roller brush (100) and the second roller brush (200) are used to clean the surface to be cleaned; One end of the first roller brush (100) adjacent to the second roller brush (200) is provided with a first end surface (101), and one end of the second roller brush (200) adjacent to the first roller brush (100) is provided with a second end surface (201); The states of the roller brush mechanism include an extended state and a retracted state, and at least one of the first roller brush (100) and the second roller brush (200) is used to move along its own rotation axis under the drive of the first power mechanism, so that the roller brush mechanism switches between the extended state and the retracted state; wherein, when in the retracted state, the minimum distance between the first end face (101) and the second end face (201) in the direction of the rotation axis is smaller than the minimum distance between the first end face (101) and the second end face (201) in the direction of the rotation axis when in the extended state.

2. The roller brush mechanism according to claim 1, wherein: When in the stored state, the minimum distance between the first end surface (101) and the second end surface (201) in the direction of the rotation axis is 0.

3. The roller brush mechanism according to claim 1, wherein: The roller brush mechanism comprises at least two roller brushes, the at least two roller brushes are coaxially arranged in parallel, and the first roller brush (100) and the second roller brush (200) are adjacent roller brushes among the at least two roller brushes; When in the retracted state, the first end surface (101) and the second end surface (201) are in contact with each other; when in the extended state, the first end surface (101) and the second end surface (201) are separated from each other.

4. The roller brush mechanism according to claim 1, wherein: At least one of the first end surface (101) and the second end surface (201) is a slope.

5. The roller brush mechanism according to claim 4, wherein: When the roller brush mechanism is in the extended state, the distance between the intersection of the first end surface (101) and the first rotation axis of the first roller brush (100) and the intersection of the second end surface (201) and the second rotation axis of the second roller brush (200) is less than or equal to the projection length of the inclined surface on the rotation axis of the roller brush on which it is located.

6. The roller brush mechanism according to claim 4, wherein: The first end face (101) and the second end face (201) are both inclined surfaces. When the roller brush mechanism is in the extended state, the distance between the intersection of the first end face (101) and the first rotation axis of the first roller brush (100) and the intersection of the second end face (201) and the second rotation axis of the second roller brush (200) is less than or equal to the maximum length of the projection length of the first end face (101) on the first rotation axis and the projection length of the second end face (201) on the second rotation axis.

7. The roller brush mechanism according to any one of claims 4 to 6, wherein: The surface shape of the inclined surface includes a plane, a curved surface, a combination of multiple planes, a combination of multiple curved surfaces, or a combination of a plane and a curved surface.

8. The roller brush mechanism according to claim 7, wherein: When the first end surface (101) and the second end surface (201) are both inclined surfaces, the second inclined surface (201) is adapted to the surface shape of the first inclined surface (101).

9. The roller brush mechanism according to claim 1, wherein: The roller brush mechanism comprises a roller brush shaft (300), the first roller brush (100) and the second roller brush (200) are arranged axially along the roller brush shaft (300), and at least one of the first roller brush (100) and the second roller brush (200) is used to move along the extension direction of the roller brush shaft (300) under the drive of the first power mechanism, so that the roller brush mechanism switches between the extended state and the retracted state.

10. The roller brush mechanism according to claim 9, wherein: The first roller brush (100) and the second roller brush (200) are circumferentially limited along the roller brush shaft (300), and one of the first roller brush (100) and the second roller brush (200) is used to rotate under the drive of a second power mechanism to drive the other of the first roller brush (100) and the second roller brush (200) to rotate.

11. The roller brush mechanism according to claim 10, wherein: At least one of the first roller brush (100) and the second roller brush (200) is used to move along the extension direction of the roller brush shaft (300) under the drive of the first power mechanism, and the other of the first roller brush (100) and the second roller brush (200) is used to rotate under the drive of the second power mechanism.

12. The roller brush mechanism according to any one of claims 9 to 11, wherein: The roller brush shaft (300) includes a first connecting portion and a second connecting portion, wherein the first connecting portion is connected to the first roller brush (100), and the second connecting portion is connected to the second roller brush (200), and at least one of the first connecting portion and the second connecting portion is used to move along its own rotation axis under the drive of the first power mechanism to drive the first roller brush (100) and the second roller brush (200) to move closer to or away from each other.

13. The roller brush mechanism according to claim 12, wherein: The first connecting portion includes a guide cylinder (310) and a first bracket (350), the second connecting portion includes a guide rod (320) and a second bracket (360), the first roller brush (100) is arranged circumferentially along the first bracket (350), and the second roller brush (200) is arranged circumferentially along the second bracket (360); The first end of the guide tube (310) is connected to the first bracket (350), the guide tube (310) includes a guide tube inner cavity (311) passing through the second end of the guide tube (310), and the second bracket (360) includes a roller brush inner cavity (363) passing through the second end surface; The guide rod (320) is at least partially located in the roller brush inner cavity (363), and the guide rod (320) is connected to the second bracket (360). The guide tube (310) is inserted into the roller brush inner cavity (363), and the guide rod (320) is movably inserted into the guide tube inner cavity (311).

14. The roller brush mechanism according to claim 13, wherein: The guide rod (320) is in sliding contact with the inner wall of the guide cylinder inner cavity (311) and interacts with the inner wall of the guide cylinder inner cavity (311) in the circumferential direction, so that the guide rod (320) and the guide cylinder (310) are limited in the circumferential direction.

15. The roller brush mechanism according to claim 13, wherein: The roller brush shaft (300) further comprises at least one limiting member (330), wherein the limiting member (330) is connected to the guide rod (320); when in the extended state, the limiting member (330) contacts the limiting surface (312) of the first bracket (350) to achieve axial limiting; when in the retracted state, the limiting member (330) is disengaged from the limiting surface (312) of the first bracket (350); Alternatively, the roller brush shaft (300) further comprises at least one limiting member (330), wherein the limiting member (330) is connected to the guide rod (320); when in the extended state, the limiting member (330) contacts the limiting surface (312) of the guide cylinder (310) to achieve axial limitation; and when in the retracted state, the limiting member (330) is disengaged from the limiting surface (312) of the guide cylinder (310).

16. The roller brush mechanism according to claim 15, wherein: The limiting member (330) comprises an extension rod (331) and a limiting cap (332), wherein a first end of the extension rod (331) is connected to the guide rod (320), and the limiting cap (332) is arranged on a second end of the extension rod (331); The guide tube inner cavity (311) comprises a guide area (3111) and a clearance area (3112); the guide area (3111) and the clearance area (3112) are arranged in a direction away from the second bracket (360) and are adjacent to each other; the connecting position of the guide area (3111) and the clearance area (3112) forms the limiting surface (312); and the limiting cap (332) moves at least within the clearance area (3112); When in the extended state, the limiting cap (332) contacts the limiting surface (312) for limiting, and when in the retracted state, the limiting member (330) is separated from the limiting surface (312).

17. The roller brush mechanism according to claim 16, wherein: The radial cross-sectional area of ​​the guide region (3111) is smaller than the radial cross-sectional area of ​​the clearance region (3112).

18. The roller brush mechanism according to claim 13, wherein: The roller brush shaft (300) further comprises at least one limiting member (330), wherein the limiting member (330) is connected to the guide rod (320); when in the retracted state, the limiting member (330) contacts the limiting surface (312) of the first bracket (350) to achieve axial limiting; and when in the extended state, the limiting member (330) is disengaged from the limiting surface (312) of the first bracket (350); Alternatively, the roller brush shaft (300) further comprises at least one limiting member (330), wherein the limiting member (330) is connected to the guide rod (320); when in the retracted state, the limiting member (330) contacts the limiting surface (312) of the guide cylinder (310) to achieve axial limiting; and when in the extended state, the limiting member (330) is disengaged from the limiting surface (312) of the guide cylinder (310).

19. The roller brush mechanism according to claim 13, wherein: The roller brush mechanism further comprises a sealing assembly (340), wherein the sealing assembly (340) is located between the outer wall of the guide cylinder (310) and the inner wall of the roller brush inner cavity (363).

20. The roller brush mechanism according to claim 19, wherein: The sealing component (340) is fixedly connected to the inner wall of the roller brush inner cavity (363), and the sealing component (340) is in sliding contact with the outer wall of the guide tube (310); or, the sealing component (340) is in sliding contact with the inner wall of the roller brush inner cavity (363), and the sealing component (340) is fixedly connected to the outer wall of the guide tube (310).

21. The roller brush mechanism according to claim 20, wherein: When the sealing assembly (340) is fixedly connected to the inner wall of the roller brush inner cavity (363), the second bracket (360) includes a bracket body (361) and a sealing platform (362), the roller brush mechanism further includes a protective member (400), the bracket body (361) includes the roller brush inner cavity (363), and the sealing platform (362) and the protective member (400) are spaced apart in the roller brush inner cavity (363); The guide cylinder (310) slides against the sealing platform (362) and the protective member (400); The sealing assembly (340) is located between the sealing platform (362) and the protective member (400).

22. The roller brush mechanism according to claim 21, wherein: The protective member (400) is detachably connected to the second bracket (360).

23. The roller brush mechanism according to claim 21, wherein: The sealing assembly (340) comprises an intermediate sealing body (341) and two sealing rings (342); the intermediate sealing body (341) is located between the sealing platform (362) and the protective member (400); the two sealing rings are respectively located at two ends of the intermediate sealing body (341) and respectively abut against the sealing platform (362) and the protective member (400); The two sealing rings (342) are both in sliding contact with the guide sleeve (310).

24. The roller brush mechanism according to claim 12, wherein: When the roller brush mechanism is in the extended state, the roller brush mechanism includes a storage space (10); The outer diameter of the area of ​​the roller brush shaft (300) located between the first end surface (101) and the second end surface (201) is smaller than the outer diameters of the first roller brush (100) and the second roller brush (200), and the first end surface (101), the second end surface (201) and the roller brush shaft (300) enclose at least a portion of the storage space (10); The roller brush mechanism further comprises: at least one cutting member (500), the cutting member (500) being connected to at least one of the first connecting portion and the second connecting portion, the cutting member (500) being used at least for cutting obstacles located in the storage space (10) when the roller brush mechanism switches from the extended state to the stored state.

25. The roller brush mechanism according to claim 24, wherein: The cutting end of the cutting piece (500) protrudes from the end surface of the second connecting part on the side opposite to the first connecting part, and a first cutting groove (102) axially opposite to the cutting piece (500) is formed on the end surface of the first connecting part on the side opposite to the second connecting part; And / or, the cutting end of the cutting member (500) protrudes from the end surface of the first connecting portion on the side opposite to the second connecting portion, and a first cutting groove (102) axially opposite to the cutting member (500) is formed on the end surface of the second connecting portion on the side opposite to the first connecting portion; The first cutting groove (102) constitutes at least a partial area of ​​the storage space (10); when the roller brush mechanism is in the storage state, at least the cutting end is embedded in the first cutting groove (102).

26. The roller brush mechanism according to claim 25, wherein: The roller brush mechanism further comprises a protective member (400), the protective member (400) being connected to the first connecting member and / or the second connecting portion, the cutting member (500) being fixed on the protective member (400), the end of the protective member (400) being higher than the cutting end of the cutting member (500), and when in the stored state, the end of the protective member (400) and the cutting end are both embedded in the first cutting groove (102).

27. The roller brush mechanism according to claim 24, wherein: The roller brush mechanism further comprises a protective member (400), wherein the protective member (400) is provided on one of the first connecting portion and the second connecting portion, and the cutting member (500) is provided on the other of the first connecting portion and the second connecting portion; The protective member (400) is provided with a second cutting groove (401) axially opposite to the cutting member (500), the second cutting groove (401) constituting a partial area of ​​the storage space (10), and in the storage state, the cutting member (500) is partially embedded in the second cutting groove (401).

28. The roller brush mechanism according to claim 27, wherein: A receiving groove (103) is provided on one of the first connecting portion and the second connecting portion, and the cutting member (500) is located in the receiving groove (103); The storage groove (103) constitutes a partial area of ​​the storage space (10); in the storage state, the protective member (400) is partially embedded in the storage groove (103).

29. The roller brush mechanism according to claim 24, wherein: A clearance groove (313) is provided on the roller brush shaft (300), and the clearance groove (313) extends in the direction of the rotation axis. The cutting end of the cutting member (500) is located in both the storage space (10) and the clearance groove (313). The cutting member (500) is at least used to move along the clearance groove (313) when the roller brush mechanism switches from the extended state to the stored state, so as to cut obstacles located in the storage space (10).

30. The roller brush mechanism according to claim 12, wherein: The roller brush mechanism also includes: An elastic member (600) is directly or indirectly connected to at least one of the first connecting portion and the second connecting portion; when the roller brush mechanism switches from the extended state to the retracted state, the elastic member (600) stores energy; and when the roller brush mechanism switches from the retracted state to the extended state, the elastic member (600) releases the stored energy.

31. The roller brush mechanism according to claim 12, wherein: The roller brush mechanism also includes: An elastic member (600) is directly or indirectly connected to at least one of the first connecting portion and the second connecting portion; when the roller brush mechanism switches from the storage state to the extended state, the elastic member (600) stores energy; and when the roller brush mechanism switches from the extended state to the storage state, the elastic member (600) releases the stored energy.

32. A cleaning device, wherein: include: A cleaning device body, a power mechanism, and a roller brush mechanism according to any one of claims 1 to 31; The power mechanism is connected to the cleaning device body and the roller brush mechanism respectively, and is used to drive at least one of the first roller brush (100) and the second roller brush (200) to move, and to drive the first roller brush (100) and the second roller brush (200) to rotate synchronously around the rotation axis.

33. The roller brush mechanism according to claim 32, wherein: The roller brush mechanism further comprises a matching piece, the matching piece is connected to the roller brush shaft (300) of the roller brush mechanism, and the matching piece is used to connect to the power mechanism.

34. The roller brush mechanism according to claim 33, wherein: The roller brush shaft (300) comprises an axial end opening, the roller brush shaft (300) comprises an end cover (370), the end cover (370) is connected to the roller brush shaft (300) through the axial end opening, and the fitting is connected to the end cover (370).

35. The cleaning apparatus of claim 32, wherein: The power mechanism includes a first rotation driving member, a second rotation driving member and a position driving member; The roller brush shaft (300) comprises a first connecting portion and a second connecting portion, wherein the first connecting portion is connected to the first roller brush (100), and the second connecting portion is connected to the second roller brush (200); The first rotary drive member and the second rotary drive member are connected to the first connecting portion and the second connecting portion respectively, and are used to drive the first connecting portion and the second connecting portion respectively to drive the first roller brush (100) and the second roller brush (200) to rotate synchronously around the rotation axis; The position driving member is connected to at least one of the first connecting portion and the second connecting portion to drive at least one of the first roller brush (100) and the second roller brush (200) to move relative to each other along the direction of the rotation axis.

36. The cleaning apparatus of claim 32, wherein: The power mechanism includes a rotation drive member and a position drive member; The roller brush shaft (300) comprises a first connecting portion and a second connecting portion, wherein the first connecting portion is connected to the first roller brush (100), and the second connecting portion is connected to the second roller brush (200), and the first connecting portion and the second connecting portion are circumferentially limited; The rotary driving member is connected to one of the first connecting portion and the second connecting portion, and is used to drive one of the first connecting portion and the second connecting portion to rotate, thereby driving the other of the first connecting portion and the second connecting portion to rotate synchronously; The position driving member is connected to the other one of the first connecting portion and the second connecting portion to drive the other one of the first connecting portion and the second connecting portion to move relative to each other along the direction of the rotation axis.

37. An automatic cleaning system, wherein: include: base stations; And a cleaning device as described in any one of claims 32-36, wherein the cleaning device is configured to selectively dock at the base station.

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