Cleaning head, surface cleaning equipment and cleaning system

Abstract

The invention discloses a cleaning head, a surface cleaning device and a cleaning system.The cleaning head defines a suction cavity, a rolling brush is installed in the suction cavity, the projection area, relative to a to-be-cleaned surface, of the cleaning head in the vertical direction is a first area, and the cleaning head further comprises at least one second scraping strip arranged behind the rolling brush; the hardness of the second scraping strip is greater than that of the first scraping strip; the second scraping strip can move between a first position and a second position, and in the first position, the second scraping strip makes contact with the surface to be cleaned so as to scrape at least part of dirt located on the surface to be cleaned in the moving process of the cleaning head; at the second position, the second scraping strip is far away from the to-be-cleaned surface. The driver is used for driving the second scraping strip to move between the first position and the second position. When the second scraping strip is located at the first position, the contact area of the second scraping strip and the to-be-cleaned surface is a second area, and at least part of the second area is located on the outer side of the first area.

Description

Technical Field

[0001] The present invention relates to the technical field of cleaning equipment, and in particular, to a cleaning head, a surface cleaning device, and a cleaning system. Background Art

[0002] Surface cleaning devices generally include a rotary brush or a wiping member. By using the rotary brush or the wiping member to clean the surface to be cleaned, the cleaning efficiency can be effectively improved. Since there may be some stubborn stains remaining on the surface to be cleaned, such as soy sauce or some food that adheres to the ground after a long time without being cleaned, even if it is dragged back and forth several times, it cannot be cleaned thoroughly. At this time, the user will choose to keep some spatulas at home to clean it. However, manual cleaning will affect the cleaning efficiency. Summary of the Invention

[0003] In view of the deficiencies in the above technologies, the present invention provides a cleaning head, a surface cleaning device, and a cleaning system, which can effectively clean stubborn stains on the ground.

[0004] On the one hand, the present invention provides a cleaning head, comprising The cleaning head defines a suction chamber, a rotary brush is installed in the suction chamber, a first scraping strip is provided at the edge of the suction chamber, the first scraping strip is in interference fit with the surface to be cleaned for scraping at least part of the dirt. Along the vertical direction, the projection area of the cleaning head relative to the surface to be cleaned is a first area. The cleaning head further includes: At least one second scraping strip disposed behind the rotary brush, the hardness of the second scraping strip is greater than that of the first scraping strip; the second scraping strip can move between a first position and a second position. When in the first position, the second scraping strip contacts the surface to be cleaned to scrape at least part of the dirt on the surface to be cleaned during the movement of the cleaning head; when in the second position, the second scraping strip is away from the surface to be cleaned; A driver for driving the second scraping strip to move between the first position and the second position; Wherein, when the second scraping strip is in the first position, the contact area between the second scraping strip and the surface to be cleaned is a second area, and at least part of the second area is located outside the first area.

[0005] Optionally, when the second scraping strip is in the first position, at least part of the second scraping strip protrudes from the side wall of the cleaning head.

[0006] Optionally, during the process of the second scraping strip moving from the second position to the first position, the second scraping strip moves along an inclined direction at a first angle relative to the surface to be cleaned, and the range of the first angle is greater than 0° and less than 30°.

[0007] Optionally, the drive includes a drive motor and a transmission structure. The transmission structure includes a drive gear mounted on the drive shaft of the drive motor, a transmission rack engaged with the drive gear, and a mounting bracket for mounting the second wiper. The transmission rack is fixedly mounted on the mounting bracket.

[0008] Optionally, the second wiper is substantially parallel to the surface to be cleaned, and the extending direction of the transmission rack is set at the first angle relative to the second wiper.

[0009] Optionally, a first guiding structure is provided on the mounting bracket, and a second guiding structure corresponding to the first guiding structure is provided on the cleaning head. The first guiding structure and the second guiding structure cooperate to guide the second wiper to move in an inclined direction at the first angle relative to the surface to be cleaned.

[0010] Optionally, there are two second wipers. Along the axial direction of the roller brush, one second wiper can extend from one side of the cleaning head, and the other second wiper can extend from the other side of the cleaning head.

[0011] Optionally, when the second wiper is in the second position, the second wiper can be in interference contact with the roller brush.

[0012] Optionally, the second wiper is configured to be rotatable or movable relative to its own axis when in the second position, and the second wiper can be in interference contact with the roller brush after rotation or movement.

[0013] On the other hand, the present invention also provides a surface cleaning device, which includes a main body, and a cleaning head as described above provided on the main body.

[0014] On yet another aspect, the present invention also provides a cleaning system, which includes the above-mentioned surface cleaning device; a base station for docking the surface cleaning device, which defines a cleaning cavity for accommodating at least part of the second wiper; The second wiper is configured to be movable between a second position and a third position. When the second wiper is in the third position, at least part of the second wiper extends into the cleaning cavity.

[0015] Optionally, it further includes a controller, and the controller is configured to control the second wiper to move from the second position to the third position only when the surface cleaning device is docked to the base station.

[0016] The present invention provides a cleaning head, a surface cleaning device and a cleaning system. The cleaning head defines a suction cavity, a roller brush is installed in the suction cavity, a first scraping strip is arranged at the edge of the suction cavity, and the first scraping strip is in interference fit with the surface to be cleaned for scraping at least part of the dirt. The projection area of the cleaning head relative to the surface to be cleaned in the vertical direction is a first area. The cleaning head further includes at least one second scraping strip arranged behind the roller brush, and the hardness of the second scraping strip is greater than that of the first scraping strip; the second scraping strip can move between a first position and a second position. When in the first position, the second scraping strip is in contact with the surface to be cleaned to scrape at least part of the dirt on the surface to be cleaned during the movement of the cleaning head; when in the second position, the second scraping strip is away from the surface to be cleaned. A driver is used to drive the second scraping strip to move between the first position and the second position. When the second scraping strip is in the first position, the contact area between the second scraping strip and the surface to be cleaned is a second area, and at least part of the second area is located outside the first area. By setting the working position of the second scraping strip to the outside of the cleaning head, the user can quickly scrape off the dirt through the second scraping strip. Description of the Drawings

[0017] Figure 1 Schematic structural diagram of a cleaning system in an embodiment of the present application; Figure 2 Schematic structural diagram of a floor sweeping robot in an embodiment of the present application; Figure 3 Schematic structural diagram of a cleaning head in an embodiment (the second scraping strip is in the second position); Figure 4 Schematic structural diagram of a cleaning head in an embodiment (the second scraping strip is in the first position); Figure 5 Rear view of a cleaning head in an embodiment (the second scraping strip is in the second position); Figure 6 Rear view of a cleaning head in an embodiment (the second scraping strip is in the first position); Figure 7 Rear view of a cleaning head in an embodiment (the second scraping strip is in the third position); Figure 8 Schematic structural diagram of a cleaning head after hiding the upper shell and the lower shell (the second scraping strip is in the second position); Figure 9 Schematic structural diagram of a cleaning head after hiding the upper shell and the lower shell (the second scraping strip is in the first position); Figure 10 Side view of a cleaning head in an embodiment (the second scraping strip is in the first position); Figure 11 Side view of a cleaning head in an embodiment (the second scraping strip is in the second position); Figure 12Schematic structural diagram of the cleaning head in yet another embodiment; Figure 13 Rear view of the cleaning head in another embodiment; Figure 14 Schematic structural diagram of the cleaning head with the second wiper strip hidden in one embodiment; Figure 15 For Figure 14 Enlarged structural view of area B in Figure 16 For Figure 3 Cross-sectional view of the cleaning head along the A-A direction in Figure 17 For Figure 16 Enlarged structural view of area C in Figure 18 Schematic structural diagram of the second wiper strip installed on the mounting bracket in one embodiment. Detailed implementation manners

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0019] It should be noted that if there are directional indications in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If this specific posture changes, the directional indications will also change accordingly.

[0020] In addition, if there are descriptions such as "first" and "second" in the embodiments of the present invention, the descriptions of "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, or solution B, or a solution where A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0021] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0022] Reference Figure 1 and 2 , Figure 1 discloses a cleaning system 101. The cleaning system 101 includes a surface cleaning device 100 and a base station 200 for docking with the surface cleaning device 100. Figure 2 discloses a schematic structural view of a floor cleaning robot. The surface cleaning device 100 generally includes a main body 10 and a cleaning head 20 connected to the main body 10. When the surface cleaning device 100 is a vertical cleaning device, the main body 10 and the cleaning head 20 can pivot relative to each other. When the surface cleaning device 100 is an autonomous cleaning device such as a floor cleaning robot, the main body 10 and the cleaning head 20 can be integrated together. The main body 10 generally defines a receiving space, and components such as a sewage tank, a suction motor, and a clean water tank can be placed in the receiving space. The surface cleaning device 100 generally includes a dirt recovery system and / or a cleaning liquid supply system. The dirt recovery system includes a suction motor that generates a suction airflow and a recovery tank that holds dirt. The cleaning liquid supply system includes a cleaning liquid tank and a supply pipeline for directly or indirectly supplying the cleaning liquid to the surface to be cleaned 102. Directly supplying the cleaning liquid to the surface to be cleaned means that the cleaning liquid can be directly sprayed onto the surface, and indirectly supplying the cleaning liquid to the surface to be cleaned means that the cleaning liquid can be sprayed onto the roller brush, and the cleaning liquid is brought to the surface by the rotation of the roller brush. Reference Figure 3-18 , the detailed structure of the cleaning head 20 will be mainly introduced below. The cleaning head 20 generally includes an upper housing 28 and a lower housing 27. The upper housing 28 and the lower housing 27 define an installation space. A motor or other functional components can be installed in the installation space. Since the surface cleaning device 100 is a device well-known to those skilled in the art, its working principle will not be described in detail here. Reference Figure 3-9, the structure of the cleaning head 20 is introduced in detail below. The cleaning head 20 defines a suction chamber, and a roller brush 21 is installed in the suction chamber. The roller brush 21 rotates at a high speed, which can roll up the dirt on the surface to be cleaned 102, and the dirt is then recycled into the recycling bin. In order to improve the cleaning ability of dirt such as sewage, a first scraping strip 22 is provided at the edge of the suction chamber. The first scraping strip 22 is in interference fit with the surface to be cleaned 102, and is used to scrape off at least part of the dirt, and at the same time improve the sealing performance (i.e., suction ability) of the suction chamber. In order to improve the ability to clean stubborn garbage, the cleaning head 20 further includes a second scraping strip 23 provided behind the first scraping strip 22 or the roller brush 21. The second scraping strip 23 is preferably provided behind the first scraping strip 22. The hardness of the second scraping strip 23 is greater than that of the first scraping strip 22. The first scraping strip 22 can be made of a relatively soft rubber material. After contacting the hard floor, it can deform to better fit the floor and scrape off the dirt and water stains on the floor. The second scraping strip 23 can also be made of rubber material, but its hardness is relatively large. After contacting the hard floor, it basically does not deform and can form a scraping force on the stubborn stains on the floor. Of course, the second scraping strip 23 can also be made of other hard materials. The second scraping strip 23 can be in a certain arc shape along its length direction. Of course, it can also be other shapes. When the second scraping strip 23 works, its working surface or working end is preferably at a certain angle with the surface to be cleaned 102. In this way, scratches on the surface to be cleaned 102 can be avoided. The angle between the working surface of the second scraping strip 23 and the surface to be cleaned 102 can be between 1° and 40° (the working angle of a user using a small spatula to scrape off dirt can be referred to), so that the floor can be effectively prevented from being scratched. The outermost side (i.e., the suspended end) of the second scraping strip 23 can be in a circular arc structure, so that the second scraping strip 23 can be prevented from scratching other objects when it extends. Since the hardness of the second scraping strip 23 is relatively large, it may cause damage to the surface to be cleaned 102 after long-term use. The second scraping strip 23 can move between a first position and a second position. In the first position (refer to Figure 4 and 6 ), the second scraping strip 23 is in contact with the surface to be cleaned 102 to scrape off at least part of the dirt located on the surface to be cleaned 102 during the movement of the cleaning head 20. In the second position (refer to Figure 3 and 5), the second squeegee 23 is away from the surface to be cleaned 102. To achieve the movement of the second squeegee 23 between the first position and the second position, the surface cleaning device 100 further includes a driver 24 for driving the second squeegee 23. When there is stubborn garbage that the roller brush 21 on the ground cannot remove, the second squeegee 23 can be operated to the first position by the driver 24. In this way, since the hardness of the second squeegee 23 is much greater than that of the first squeegee 22, the second squeegee 23 scrapes the surface to be cleaned 102 to wipe off stubborn stains. Further, an anti-collision structure and / or a wiping test piece can be installed on the outermost side (suspended end) of the second squeegee 23 to wipe the side structures such as the skirting board and the corner at the same time.

[0023] Reference Figure 4 , along the vertical direction, the projection area of the cleaning head 20 relative to the surface to be cleaned 102 is the first area 31. When the second squeegee 23 is in the first position, the contact area between the second squeegee 23 and the surface to be cleaned 102 is the second area 32, and at least part of the second area 32 is located outside the first area 31. When at least part of the second area 32 is outside the first area 31, it can be understood that part of the second squeegee 23 is located outside the cleaning head 20. In this way, the user can conveniently align the second squeegee 23 with the dirt and can also conveniently see whether the dirt is effectively scraped off during the process of scraping the dirt. The second area 32 can be located on the side of the first area 31 or behind the first area 31.

[0024] Reference Figure 4-9 , in one embodiment, when the second squeegee 23 is in the first position, at least part of the second squeegee 23 protrudes from the side wall 30 of the cleaning head 20, that is, the second area 32 is located on the side of the first area 31. To ensure that the second squeegee 23 does not contact the surface to be cleaned 102 when in the second position and contacts the surface to be cleaned 102 after extending from the side of the cleaning head 20 to the first position. During the process of the second squeegee 23 moving from the second position to the first position, the second squeegee 23 moves along an inclined direction at a first angle relative to the surface to be cleaned 102, and the range of the first angle is greater than 0° and less than 30°. The second squeegee 23 moving along an inclined direction at a first angle relative to the surface to be cleaned 102 can be understood as the second squeegee 23 moving along the first direction and the second direction at the same time. Among them, the first direction is the downward vertical direction, and the second direction is the horizontal direction perpendicular to the first direction. It is equivalent to the second squeegee 23 moving obliquely downward, but the working surface of the second squeegee 23 is always parallel to the surface to be cleaned 102. The second direction can be parallel to the axis direction of the roller brush 21 or at a certain angle with the axis direction of the roller brush 21. That is, the second squeegee 23 can be perpendicular to the side wall 30 of the roller brush 21 after extending (Reference Figure 4 ), or at a certain angle with the side wall 30 of the roller brush 21 (Reference Figure 12), that is, the second squeegee 23 can be tilted forward or backward relative to the side wall 30.

[0025] The driver 24 can be a manual driver 24 or an automatic driver 24. When the driver 24 is a manual driver 24 (not shown in the figure), the driver 24 includes a driving member and a transmission member that transmits the connection between the driving member and the second squeegee 23. The cleaning head 20 includes an upper housing 28 and a lower housing 27. The driving member is disposed on the cleaning head 20, and the driving member protrudes from the upper housing 28 to be operable by the user. The user can manipulate the driving member, and the driving member can drive the second squeegee 23 to move relative to the lower housing 27 through the transmission member, retracting or lowering the second squeegee 23 to move away from or contact the surface 102 to be cleaned. In another embodiment, the driving member is disposed on the handle of the main body 10, and the transmission member transmits the connection between the driving member and the second squeegee 23. The user controls the movement of the second squeegee 23 between the first position and the second position through the driving member located on the handle.

[0026] Reference Figure 8 and 9 , 14-18, when the driver 24 is an automatic driver 24, the driver 24 includes a driving motor 241 and a controller for controlling the driving motor 241. The controller is configured to drive the driving motor 241 according to a signal to control the movement of the second squeegee 23 between the first position and the second position. Specific control components are not described in detail here. The handle may be provided with a control button for emitting a control signal through the control button, and the controller controls the movement of the second squeegee 23 between the first position and the second position according to the signal emitted by the control button. Specifically, the driver 24 further includes a transmission structure 242. The transmission structure 242 includes a driving gear 243 mounted on the driving shaft of the driving motor 241, a transmission rack 244 engaged with the driving gear 243, and a mounting bracket 245 for mounting the second squeegee 23. The transmission rack 244 is fixedly mounted on the mounting bracket 245. The second squeegee 23 can be fixed to the mounting bracket in the form of rubber coating, and the second squeegee 23 can also be fixed to the mounting bracket 245 by bolts, snap connections, welding, etc. The second squeegee 23 is substantially parallel to the surface 102 to be cleaned, and the extending direction of the transmission rack 244 is set at a first angle relative to the second squeegee 23. In this way, during the movement of the second squeegee 23, it is ensured that its working surface is substantially parallel to the surface 102 to be cleaned, and the second squeegee 23 realizes an oblique movement through the obliquely arranged transmission rack 244.

[0027] Reference Figure 14-18, To enable the second squeegee 23 to smoothly switch between the first position and the second position. A first guiding structure 25 is provided on the mounting bracket 245, and a second guiding structure 26 corresponding to the first guiding structure 25 is provided on the cleaning head 20. The first guiding structure 25 and the second guiding structure 26 cooperate to guide the second squeegee 23 to move in an inclined direction at a first angle relative to the surface 102 to be cleaned. Reference Figure 5 、 14 、15, the cleaning head 20 includes an upper housing 28 and a lower housing 27. When the second squeegee 23 is in the second position, the second squeegee 23 moves into the accommodation cavity defined by the lower housing 27. That is, when the second squeegee 23 is in the second position, the lowermost part of the second squeegee 23 can be completely received into the lower housing 27. Completely receiving the second squeegee 23 into the accommodation cavity can avoid damage to the ground due to uneven ground.

[0028] Reference Figure 10 and 11 , the cleaning head 20 further includes a first roller group 41 provided behind the first squeegee 22 and a second roller group 42 provided at the rear end of the cleaning head 20. The first roller group 41 and the second roller group 42 jointly support the cleaning head 20. The second squeegee 23 is provided between the first roller group 41 and the second roller group 42. When the second squeegee 23 is in the first position, the lowermost end of the second squeegee 23 is lower than the plane defined by the first roller group 41 and the second roller group 42.

[0029] Continue to refer to Figure 10 and 11 , To improve the cleaning degree of the second squeegee 23 on the ground, when the second squeegee 23 contacts the hard ground, the first roller group 41 is separated from the hard ground. At this time, the first roller group 41 does not contact the ground, and the second squeegee 23 and the second roller group 42 jointly support the cleaning head 20. The second squeegee 23 is subjected to a relatively large force and the cleaning effect is also relatively good.

[0030] Reference Figure 12 and 13 , the cleaning head 20 may include two second squeegees 23. Along the axial direction of the roller brush 21, one of the second squeegees 23 can extend from one side of the cleaning head 20, and the other second squeegee 23 can extend from the other side of the cleaning head 20 (refer to Figure 13 ). Further, multiple second squeegees 23 can be provided on each side to be cleaned, and the arrangement of the multiple second squeegees 23 can also be adjusted according to actual needs (refer to Figure 12 ).

[0031] Based on the above embodiments, in order to achieve self-cleaning of the second wiper 23, when the second wiper 23 is in the second position, the second wiper 23 can be in interference contact with the roller brush 21. In this way, whether during the operation of the surface cleaning device 100 or during the self-cleaning of the surface cleaning device 100, the second wiper 23 can be self-cleaned. A third wiper can also be provided on the cleaning head. The third wiper is generally provided behind the roller brush 21 and above the first wiper 22. The third wiper can always be in interference fit with the roller brush. When the second wiper 23 is in the second position, the second wiper 23 can be arranged adjacent to the third wiper.

[0032] Based on the above embodiments, the second wiper 23 is configured to be rotatable or movable relative to its own axis when in the second position. After the second wiper 23 rotates or moves, it can be in interference contact with the roller brush 21. That is, when the second wiper 23 is in the second position, it neither contacts the surface to be cleaned 102 nor contacts the roller brush 21. When self-cleaning is required, the second wiper 23 can be rotated or moved to make it contact the roller brush 21. The roller brush 21 can remove the dirt on the second wiper 23. When self-cleaning of the second wiper 23 is required, the controller can be used to control the second wiper 23 to rotate or move relative to its own axis.

[0033] This application also discloses a cleaning system 101, which further includes the surface cleaning device 100 and the base station 200 in any of the above embodiments. The base station 200 is used to dock with the surface cleaning device 100, and it defines a cleaning cavity for accommodating at least a part of the second wiper 23.

[0034] The second wiper 23 is configured to be movable between a second position (refer to Figure 5 ) and a third position (refer to Figure 7 ). When the second wiper 23 is in the third position, at least a part of the second wiper 23 extends into the cleaning cavity. At this time, the second wiper 23 can be cleaned by the liquid in the cleaning cavity. After the cleaning is completed, the second wiper 23 can be controlled to move to the second position. The controller of the surface cleaning device 100 is also configured such that only when the surface cleaning device 100 is docked with the base station 200, the controller can control the second wiper 23 to move from the second position to the third position. That is, when the surface cleaning device 100 is performing the surface cleaning work, it is not allowed to move to the third position to prevent scratching the floor.

[0035] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and embodiments. It can be fully applied to various fields suitable for the present invention. For those skilled in the art, additional modifications can be easily made. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the examples shown and described herein.

Claims

1. A cleaning head, characterized in that, Comprising: The cleaning head defines a suction chamber, a roller brush is installed in the suction chamber, a first scraping strip is arranged at the edge of the suction chamber, the first scraping strip is in interference fit with the surface to be cleaned for scraping at least part of the dirt, and the projection area of the cleaning head relative to the surface to be cleaned in the vertical direction is a first area. The cleaning head further includes: At least one second scraping strip arranged behind the roller brush, and the hardness of the second scraping strip is greater than that of the first scraping strip; the second scraping strip can move between a first position and a second position. When in the first position, the second scraping strip contacts the surface to be cleaned to scrape at least part of the dirt located on the surface to be cleaned during the movement of the cleaning head; when in the second position, the second scraping strip is away from the surface to be cleaned; A driver for driving the second scraping strip to move between the first position and the second position; Wherein, when the second scraping strip is in the first position, the contact area between the second scraping strip and the surface to be cleaned is a second area, and at least part of the second area is located outside the first area.

2. The cleaning head according to claim 1, wherein When the second scraping strip is in the first position, at least part of the second scraping strip protrudes from the side wall of the cleaning head.

3. The cleaning head according to claim 2, wherein During the process of the second scraping strip moving from the second position to the first position, the second scraping strip moves along an inclined direction at a first angle relative to the surface to be cleaned, and the range of the first angle is greater than 0° and less than 30°.

4. The cleaning head according to claim 3, wherein The driver includes a driving motor and a transmission structure. The transmission structure includes a driving gear mounted on the driving shaft of the driving motor, a transmission rack engaged with the driving gear, and a mounting bracket for mounting the second scraping strip, and the transmission rack is fixedly mounted on the mounting bracket.

5. The cleaning head according to claim 4, wherein The second scraping strip is substantially parallel to the surface to be cleaned, and the extending direction of the transmission rack is arranged at the first angle relative to the second scraping strip.

6. The cleaning head according to claim 5, wherein A first guiding structure is arranged on the mounting bracket, and a second guiding structure corresponding to the first guiding structure is arranged on the cleaning head. The first guiding structure and the second guiding structure cooperate to guide the second scraping strip to move along an inclined direction at the first angle relative to the surface to be cleaned.

7. The cleaning head according to any one of claims 1-6, wherein It includes two second scraping strips. Along the axial direction of the roller brush, one second scraping strip can extend from one side of the cleaning head, and the other second scraping strip can extend from the other side of the cleaning head.

8. The cleaning head according to any one of claims 1-6, wherein When the second scraping strip is in the second position, the second scraping strip can be in interference contact with the roller brush.

9. The cleaning head according to any one of claims 1-6, wherein The second squeegee is configured to be rotatable or movable relative to its own axis when in the second position, and after rotation or movement, the second squeegee can be in interference contact with the roller brush.

10. A surface cleaning device, characterized in that a main body, and a cleaning head provided on the main body as described in any one of claims 1-9.

11. A cleaning system, characterized in that, It includes the surface cleaning device as described in claim 10; a base station for docking the surface cleaning device, which defines a cleaning cavity for accommodating at least a part of the second squeegee; The second squeegee is configured to be movable between a second position and a third position, and when the second squeegee is in the third position, at least a part of the second squeegee extends into the cleaning cavity.

12. The cleaning system as described in claim 11, characterized in that it further includes a controller, and the controller is configured to control the second squeegee to move from the second position to the third position only after the surface cleaning device is docked to the base station.

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