Surface cleaning device

Abstract

The utility model discloses a surface cleaning device which comprises a floor brush shell and a cleaning assembly arranged on the floor brush shell, the cleaning assembly comprises a cleaning roller, a dirt scraping piece movably abutting against the cleaning roller, a liquid supply piece arranged above the dirt scraping piece and a dirt suction opening formed below the dirt scraping piece, and the dirt scraping piece is movably connected with the cleaning roller. The dirt scraping piece can rotate relative to the liquid supply piece so that a circumferential sliding dirt scraping area can be formed on the surface of the cleaning roller. A sliding dirt scraping area can be formed on the surface of the cleaning roller in the rotating movement process of the dirt scraping piece, so that the dynamic contact area between the dirt scraping piece and the surface of the cleaning roller is increased, and the dirt scraping effect is improved; in addition, the rotating dirt scraping piece can shovel up the hair clusters which fall down and even are attached to the surface of the cleaning roller under the action of centrifugal force, dirt adhesion, cleaning liquid and the like so as to loosen the hair clusters, dirt and the like can fall off and be collected conveniently, and the cleaning effect is further improved.

Description

A surface cleaning device Technical Field

[0001] This application belongs to the field of cleaning appliance technology, specifically relating to a surface cleaning device. Background Technology

[0002] For surface cleaning devices that use running water cleaning technology, such as floor scrubbers, vacuum cleaners, and sweepers, clean water is continuously sprayed onto the surface of the cleaning components during operation. The wet cleaning components rotate and contact the surface to be cleaned, achieving cleaning. During rotation, the cleaning components adsorb dirt onto their outer surface, which is then scraped off by the closely fitting scraper, maximizing cleaning effectiveness. However, during the cleaning process, the rotating cleaning components are simultaneously subjected to friction from the ground and the scraping force of the scraper. Even during self-cleaning, the rotating cleaning components are subjected to the scraping force of the scraper. Over time, this wears down the outer surface of the cleaning components, reducing their cross-sectional area. This weakens the contact force between the scraper and the outer surface of the cleaning components, resulting in poorer or even no scraping effect, ultimately impacting the cleaning performance of the machine. In addition, while existing surface cleaning devices' self-cleaning systems can remove most of the residual dirt in the cleaning components and pipes, they are prone to getting tangled in the scraper and suction port when dealing with a mixture of hair and dirt. The self-cleaning system usually cannot clean it properly. When cleaning the dirt, the operator still needs to manually separate the scraper from the cleaning component and clean the dirt on the scraper, which affects the user experience.

[0003] The prior art discloses a cleaning device, including a cleaning drive component, a transmission assembly, a scraper, and a limiting housing. The cleaning drive component is drivenly connected to the transmission assembly, and the output end of the transmission assembly is drivenly connected to the scraper. The transmission assembly can drive the scraper to move toward or away from the cleaning component, so that the scraper has a first position and a second position that abuts against the cleaning component, and a third position that is spaced apart from the cleaning component. The limiting housing is installed inside the machine body and has an opening facing the cleaning component. At least a portion of the scraper is movably accommodated inside the limiting housing. In this prior art, the scraper moves by retracting and extending back and forth under the drive of the transmission assembly. Specifically, the transmission assembly includes an eccentric mechanism, a connecting rod, and a mounting base. One end of the connecting rod is connected to the output end of the eccentric mechanism. One end of the mounting base is connected to the scraper, and the other end passes through the limiting housing and is rotatably connected to the other end of the connecting rod. The limiting housing can restrict the movement direction of the mounting base so that the mounting base can only move toward or away from the cleaning component. The output end of the eccentric mechanism drives one end of the connecting rod to rotate circumferentially. The connecting rod is rotatably connected to the mounting base to convert the rotation of the connecting rod into the retracting and extending movement of the scraper. While this existing technology can change the contact state between the scraper and the cleaning component by controlling the back-and-forth movement of the scraper blade, it only changes the interference fit or transitions from a contact state to a non-contact state. From the perspective of scraping, during the dynamic positional change of the scraper blade from a non-contact state to a contact state—that is, from the third position (non-contact state), to the first position (contact state, with a small amount of contact between the scraper blade and the cleaning component), and then to the second position (contact state, with a large amount of contact between the scraper blade and the cleaning component)—the scraper blade is only moving back and forth. In conjunction with the rotation of the cleaning component, during this short-term motion, the contact between the scraper and the cleaning component is generally linear along the radial direction of the cleaning component. The contact area between the scraper and the bristles on the surface of the cleaning component does not undergo substantial change (this change refers to the change compared to the prior art where the scraper and the cleaning component are always in contact). Because the contact area is not significantly improved, compared to the contact state between the scraper and the cleaning component in the prior art, the scraper in this technical solution does not have any other significant effect on removing hair, clay, etc., adhering to the bristles during the contact process with the bristles. Therefore, the cleaning effect does not meet expectations.

[0004] In addition, the existing technology has the following defects: the cleaning drive and transmission components cooperate to drive the scraper to move back and forth, and it is difficult to form a good seal between the scraper and the limiting housing, resulting in more places for dirt to accumulate inside the floor brush housing, and hair and dirt are more likely to get stuck; when the scraper switches between the first, second and third positions, the movement is a back and forth extension and retraction movement, and the height distance between the scraper comb assembly and the suction port does not change much when switching positions, so the dirt remaining on the scraper comb assembly is still difficult to be sucked into the suction port. Summary of the Invention

[0005] This application provides a surface cleaning device to solve the technical problem that existing surface cleaning devices cannot effectively scrape the surface of the cleaning component during the forward and backward extension and retraction of the scraping component. Furthermore, during the transition from a non-contact state to a contact state, the linear feed motion from back to front can easily generate sudden operating resistance on the cleaning component in operation, resulting in a momentary increase in the workload of the motor that drives the cleaning component, which in turn leads to a momentary increase in the motor's operating current and affects the motor's service life.

[0006] The technical solution adopted in this application is as follows:

[0007] A surface cleaning device includes a floor brush housing and a cleaning assembly disposed on the floor brush housing. The cleaning assembly includes a cleaning roller, a scraping member that movably abuts against the cleaning roller, a liquid supply member disposed above the scraping member, and a suction port disposed below the scraping member. The scraping member is rotatable relative to the liquid supply member to form a circumferential sliding scraping area on the surface of the cleaning roller.

[0008] The scraping component in this application can rotate relative to the liquid supply component to contact or disengage from the cleaning roller. During the rotation of the scraping component to achieve position switching, a sliding scraping area along the circumference of the cleaning roller can be formed on the surface of the cleaning roller. Taking the movement of the scraping component from a position away from the cleaning roller to a position contacting the cleaning roller as an example, the scraping component will experience a process of no contact with the bristles on the surface of the cleaning roller, contact with the tip of the bristles or a position near the tip, rotation along the circumference of the cleaning roller and contact with the root of the bristles, and even a portion of the scraping component disengaging from the root of the bristles and scooping up the bristles to move towards the tip. This process allows the scraping component to form a sliding scraping area on the surface of the cleaning roller, which not only increases the dynamic contact area between the scraping component and the surface of the cleaning roller, improving the scraping effect, but also, under the action of centrifugal force, dirt adhesion, and cleaning liquid, scoops up the bristles that have fallen or even adhered to the surface of the cleaning roller, loosening the bristles and facilitating the falling and collection of dirt, further improving the cleaning effect. Furthermore, during the rotation of the scraper, the resistance to the cleaning roller changes from no contact to shallow contact, then to sliding along the surface of the cleaning roller, and finally to complete contact. This variation in resistance prevents a sudden increase in the workload of the motor driving the cleaning roller, thus extending the motor's lifespan. Additionally, as the scraper moves from tangential contact to complete contact, the cleaning roller continues to rotate, and the bristles on the cleaning roller also wipe the surface of the scraper, significantly reducing the amount of dirt accumulating on its surface. This eliminates the need for users to clean the scraper's surface separately, improving the user experience. From another perspective, the rotational motion of the scraper ensures a gentle contact and separation process with the cleaning roller, reducing the harsh pressure exerted by the scraper on the bristles of the cleaning roller surface and providing excellent protection for the bristles. When the rotational motion of the scraper is applied to the self-cleaning process of the surface cleaning device, the rotational motion of the scraper will lift and loosen the tufts of hair on the cleaning roller, thereby facilitating hot air circulation, improving the drying efficiency of the cleaning roller, and preventing the cleaning roller from being in a humid environment for a long time and thus breeding bacteria.

[0009] The rotational motion of the scraping component in this application can exist not only in the cleaning process but also in the self-cleaning process of the surface cleaning device, and is particularly suitable for the self-cleaning process. Taking the self-cleaning process as an example, during the automatic cleaning process, the cleaning roller rotates. When the scraping component is in contact with the cleaning roller, it continuously scrapes the bristles on the cleaning roller to remove the dirt or grime. After the scraping component has been scraping the bristles on the cleaning roller for a certain period of time, it rotates to deflect away from the cleaning roller, thereby forming a circumferential sliding scraping area on the surface of the cleaning roller. This allows the dirt or grime scraped off by the scraping component to be carried away from the cleaning roller and sucked to the suction port of the surface cleaning device, improving the treatment effect of dirt. In this process, assuming that there is hair or other tangled material on the cleaning roller, the tangled material will be pulled loose by the movement of the scraping component. With the reverse rotation of the cleaning roller, the tangled material will detach from the cleaning roller and be kneaded into a ball between the cleaning roller and the suction port through the forward and reverse movements of the cleaning roller. During this process, an upper suction channel is formed between the roller brush cover and the upper surface of the cleaning roller. Under the action of the suction motor, the kneaded tangled material will be relatively easily sucked into the suction port, thereby improving the treatment effect of hair and other tangled materials. During this process, if there are stuck dirt particles between the scraper and the cleaning roller, between the scraper and the suction port, and / or between the cleaning roller and the liquid supply device, the dirt particles will be loosened due to the movement of the scraper. The lower surface of the cleaning roller and the scraper strip of the floor brush housing form a lower suction channel that communicates with the suction port. When the scraper moves to a position away from the cleaning roller, the space between the roller brush cover and the upper surface of the cleaning roller is fully opened, forming an upper suction channel that communicates with the suction port. That is, the upper suction channel is fully opened. Under the action of the suction motor, the tangled matter, liquid, and loose dirt that are carried away from the cleaning roller by the scraper are sucked into the suction port from the upper and lower suction channels, respectively. Thus, the tangled matter, liquid, and dirt are drawn into the collection bucket through the suction port, which thoroughly improves the tangling of hair and other tangled matter on the cleaning roller and collects them well, improving the self-cleaning effect of the cleaning roller and greatly improving the efficiency of self-cleaning. During this process, as the scraper moves from a position away from the cleaning roller to a position in contact with the cleaning roller, the movement of the scraper loosens the dirt adhering to the area near the suction port. The dirt clamped between the scraper and the suction port also loosens and detaches from the suction port, and is carried away by the scraper back to the cleaning roller. This significantly reduces the accumulation of dirt at the suction port, saving users the trouble of cleaning the suction port separately and improving the user experience.

[0010] The sliding angle of the scraper along the circumference of the cleaning roller is α, and α satisfies: 4°≤α≤10°.

[0011] In this technical solution, the sliding angle α of the scraper during its circumferential sliding along the cleaning roller satisfies 4°≤α≤10°. This increases the depth to which the scraper penetrates into the bristles of the cleaning roller, allowing it to move smoothly from the depths of the bristles to the tips. This effectively removes dirt or debris from deep within the bristles, especially removing tightly wrapped material. Furthermore, it reduces the impact of the scraper's movement on the cleaning roller, decreasing the reaction force on the drive motor and thus reducing its lifespan. Moreover, by optimizing the sliding angle, the dirt removal process can be better controlled, reducing the probability of dirt being flattened on the cleaning roller surface or near the suction port during scraper movement, thereby improving the cleaning effect.

[0012] The front side of the floor brush housing is provided with a mounting cavity with an opening facing forward, and the front side of the floor brush housing is also provided with a suction port. The lower cavity wall of the mounting cavity forms part of the top wall of the suction port, and the scraping component is slidably disposed in the mounting cavity relative to the liquid supply component.

[0013] In this technical solution, the mounting cavity provides motion guidance and space for the rotational movement of the scraping component, making its rotation more reliable and stable. This significantly reduces the probability of the floor brush housing shaking or vibrating due to the rotational movement of the scraping component, thereby reducing the impact of the scraping component's rotation on the cleaning roller's rotation and ensuring the stability of the cleaning roller's operation. The lower wall of the mounting cavity forms part of the top wall of the suction port, achieving a compact structural layout, reducing space occupation, and making the floor brush housing more compact. This facilitates integration into surface cleaning devices and contributes to the miniaturization of the floor brush housing.

[0014] The scraper has a first position that abuts against the cleaning roller and a second position that disengages from the cleaning roller and brings the front end of the scraper close to the suction port. The scraper rotates between the first position and the second position. When the scraper is in the second position, it disengages from the cleaning roller and abuts against the front end of the lower cavity wall.

[0015] In this technical solution, when the scraper is in the first position, it contacts the cleaning roller, effectively scraping away dirt adsorbed on the cleaning roller. It also forms a sealed lower suction channel with the cleaning roller, the surface to be cleaned, and the suction port, helping to ensure the suction force of the lower suction channel and thus improving the dirt suction effect. When the scraper is in the second position, it disengages from the cleaning roller, and its front end is close to the suction port, helping to guide the scraped dirt to the suction port, improving the dirt collection efficiency. Furthermore, in the second position, wear on the cleaning roller is reduced, extending the service life of the cleaning roller. It also reduces the rotational resistance of the cleaning roller, reducing the load on the drive motor used to drive the cleaning roller's rotation, thereby reducing energy consumption. The scraper has at least a scraping state that contacts the cleaning roller and a clearance state that stops at the front end against the lower cavity wall. This means that the scraper can also have a third, fourth, or even more positions between the first and second positions. That is, the scraper has an intermediate state between the scraping state and the clearance state. This intermediate state can be a state in which the scraper has shallow contact with the surface of the cleaning roller (i.e., the amount of contact between the scraper and the surface of the cleaning roller in the intermediate state is less than the amount of contact between the scraper and the surface of the cleaning roller in the scraping state), or a state in which the scraper has no contact with the surface of the cleaning roller and the front end of the scraper is between the surface of the cleaning roller and the suction port (i.e., the position when it is not rotated to the clearance state). The existence of the intermediate state makes the stopping position of the scraper more possible, so that the position of the scraper can be adjusted according to actual needs to meet different cleaning effects.

[0016] The scraping component also includes a comb tooth section. The front end of the comb tooth section is provided with a plurality of first comb teeth arranged at intervals along the axial direction of the cleaning roller. The comb tooth section can abut against the front end of the lower cavity wall through the root of the first comb teeth. The tip of the first comb teeth is not lower than the inner surface of the top wall of the suction port.

[0017] In this technical solution, the mounting cavity is located above the suction port, and the lower wall of the mounting cavity forms part of the top wall of the suction port. This means that when the scraper rotates to contact the cleaning roller, it is equivalent to extending the suction port forward and cooperating with the cleaning roller and the scraper to form a suction chamber. Compared with the prior art, which moves the scraper back and forth to contact the cleaning roller, when the comb teeth of the scraper rotate to contact the cleaning roller, it is equivalent to extending the suction chamber along the comb teeth to the cleaning roller, further expanding the volume of the suction chamber. A suction chamber with a wide front end and a narrow rear end can be formed between the comb teeth, the cleaning roller, and the suction port. Under the action of the suction motor, this expanded suction chamber will form a siphon effect, improving the suction effect and further improving the suction efficiency. Several first comb teeth, spaced apart along the axial direction of the cleaning roller at the front end of the comb section, can move synchronously with the rotation of the scraper to loosen and lift the tufts on the cleaning roller during contact, thereby helping to scrape off the dirt adhering to the surface of the cleaning roller and improving the cleaning effect. The root of the first comb tooth abuts against the front end of the lower cavity wall, thus limiting the rotational movement of the scraper and improving the positional accuracy of the scraper. When the front end of the comb section abuts against the front end of the lower cavity wall through the root of the first comb tooth, the tip of the first comb tooth is not lower than the inner surface of the top wall of the suction port. This avoids the tip of the first comb tooth obstructing the dirt moving towards the suction port, maximizing the open state of the front end of the suction port, facilitating the collection of dirt by the suction port, and significantly reducing the probability of dirt getting entangled on the tip of the first comb tooth and rotating with the first comb tooth to re-adhere to the surface of the cleaning roller.

[0018] The front end of the lower cavity wall is provided with a first sealing element, which abuts against the lower surface of the comb teeth to achieve dynamic sealing.

[0019] In this technical solution, a first sealing element is added to the front end of the lower cavity wall, enabling a dynamic seal between the first sealing element and the moving comb teeth. This prevents dirt from entering the brush housing through the gap between the scraper and the lower cavity wall, thus protecting the electronic components inside the brush housing. Furthermore, as the scraper rotates along the mounting cavity, the first sealing element abuts against the comb teeth, effectively wiping the lower surface of the comb teeth and preventing dirt accumulation, reducing the user's cleaning burden.

[0020] The comb tooth portion has an arc-shaped surface tangent to the lower cavity wall. The first comb tooth is located at the front of the arc-shaped surface. The bottom of the groove of the first comb tooth is smoothly connected to the arc-shaped surface. When the scraping component is in the scraping state of contacting the cleaning roller, the tip of the first comb tooth abuts against the cleaning roller.

[0021] In this technical solution, the comb teeth have an arc-shaped surface tangent to the lower cavity wall. This allows the scraper to rotate from a state of contact with the cleaning roller to a state of movement away from the cleaning roller. As the scraper rotates, some of the dirt scraped off by the scraper will be thrown towards the suction port along the arc-shaped surface under centrifugal force, instead of being thrown towards the top of the suction port or above it. This reduces the probability of dirt accumulating at the top of the suction port and also reduces the probability of dirt entering the floor brush housing through the gap between the scraper and the mounting cavity. This helps to protect the electronic components inside the floor brush housing. As the scraper rotates from a position away from the cleaning roller to a position in contact with the cleaning roller, dirt or liquid can also move towards the cleaning roller through the bottom of the groove of the first comb tooth due to the centrifugal force of the curved surface. This allows the dirt or liquid to return to the bristles of the cleaning roller, or, under the action of gravity, fall from the curved surface into the vicinity of the suction port, where it is drawn away by the suction motor. This prevents dirt or liquid from accumulating on the curved surface, reducing the cleaning burden on the user's comb teeth.

[0022] The scraping component further includes a plurality of first comb teeth and a plurality of second comb teeth distributed along the axial direction of the cleaning roller. The second comb teeth are located above the first comb teeth. The first comb teeth and the second comb teeth are arranged alternately and staggered. The front tooth surfaces of the first comb teeth and the front tooth surfaces of the second comb teeth have an included angle β, wherein β satisfies: 0°≤β≤15°.

[0023] In this technical solution, the scraping component has several first comb teeth and several second comb teeth distributed along the axial direction of the cleaning roller. During cleaning and self-cleaning operations, the first and second comb teeth mainly function to remove dirt from the cleaning component and simultaneously untangle hair from the cleaning roller. The first and second comb teeth are arranged alternately and staggered, which reduces the resistance on the cleaning roller in the axial direction while ensuring that the cleaning roller can be scraped by the comb teeth of either the first or second comb teeth in its axial direction. The first and second comb teeth are arranged in a coordinated manner to improve the removal effect of dirt. By rationally determining the value of the included angle β between the front tooth surfaces of the first and second comb teeth, it can be ensured that, on the one hand, both the first and second comb teeth have a suitable interference fit with the cleaning roller when the scraping component is in contact with the cleaning roller, ensuring the scraping effect on the cleaning roller. On the other hand, it can also reduce the probability of dirt, especially hair, getting tangled on the second comb teeth, thereby improving the cleaning effect of the scraping component itself.

[0024] The liquid supply component has a liquid supply surface and a liquid supply port. The scraping component includes a scraper extending toward the cleaning roller. When the scraping component is in a scraping state that is in contact with the cleaning roller, the scraper abuts against the cleaning roller, and the scraper, the liquid supply surface and the outer surface of the cleaning roller cooperate to form a liquid storage tank.

[0025] During the cleaning process, some dirt is thrown onto the liquid supply unit and brush cover as the cleaning roller rotates. This dirt is difficult to remove. This technical solution addresses this by having a scraper contact the cleaning roller to form a liquid storage tank between the scraper, the liquid supply surface, and the outer surface of the cleaning roller. At this time, the water pump operates, and the cleaning fluid accumulates in the storage tank. Combined with the low-speed reverse rotation of the cleaning roller, the dirt on the roller is squeezed out by the scraper. As the cleaning roller rotates, the cleaning fluid in the storage tank surges upward, forming a pulsed water flow, which effectively washes away the dirt on the liquid supply unit and brush cover, significantly reducing dirt residue. After rinsing, the scraper rotates away from the cleaning roller, forming an upper suction channel between the scraper and the outer circumference of the cleaning roller. The dirt and fluid in the storage tank flow downward along this upper suction channel and are drawn into the suction port, thus improving the cleaning effect.

[0026] The liquid supply component has an arc-shaped liquid supply surface and a guide arc surface that is externally tangent to the liquid supply surface. The scraping component includes a scraper extending toward the cleaning roller. The scraper includes a scraping section and a guide section connected together. The guide section slides along the guide arc surface, and the scraper is provided with a second sealing member located between the guide section and the guide arc surface. The second sealing member rotates with the scraping component to wipe the liquid supply component.

[0027] In this technical solution, the guide section provides guidance for the movement of the scraper, thereby improving the reliability and stability of its rotational motion. Furthermore, the scraper rotates along the guide arc surface, minimizing the reaction force exerted by the guide arc surface on the scraper. This reduces the impact on the power components that drive the scraper, especially when the scraper changes its rotation direction. The power components operate smoothly, preventing vibrations or jumps in the floor brush housing caused by component jitter, which could affect self-cleaning operations or even lead to unstable rotational connection between the floor brush and the cleaning roller, resulting in overload of the cleaning roller's drive motor and affecting its lifespan.

[0028] A second seal is installed on the scraper between the guide section and the guide arc surface. This creates a dynamic seal between the scraper and the liquid supply surface, preventing dirt and liquid from entering the brush housing through the gap between the scraper and the liquid supply component, thus protecting the electronic components inside the brush housing. The close contact between the second seal and the guide arc surface allows the second seal to effectively wipe the guide arc surface as it rotates with the scraper, reducing the probability of dirt accumulating on the liquid supply component. Attached Figure Description

[0029] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0030] Figure 1 is a schematic diagram of the state when the floor brush of the surface cleaning device is stored in the base station according to one embodiment of Embodiment 1 of this application;

[0031] Figure 2 is a cross-sectional view of a floor brush of a surface cleaning device according to one embodiment of Embodiment 1 of this application;

[0032] Figure 3 is an enlarged view of part A in Figure 2, which mainly shows the first state schematic diagram of the cooperation relationship between the scraping part and the cleaning roller;

[0033] Figure 4 is a schematic diagram of the second state of the cooperation relationship between the scraper and the cleaning roller in one embodiment of Embodiment 1 of this application;

[0034] Figure 5 is a schematic diagram of the third state of the cooperation relationship between the scraper and the cleaning roller in one embodiment of Embodiment 1 of this application;

[0035] Figure 6 is a schematic diagram of the fourth state of the cooperation relationship between the scraping component and the cleaning roller in one embodiment of Embodiment 1 of this application;

[0036] Figure 7 is a schematic diagram of the state when the scraper is in an avoidance state according to one embodiment of Embodiment 1 of this application;

[0037] Figure 8 is a schematic diagram of the state when the cleaning component is in the cleaning state according to one embodiment of Embodiment 1 of this application;

[0038] Figure 9 is a cross-sectional view of the floor brush when the scraping component is in an avoidance state according to one embodiment of Embodiment 1 of this application;

[0039] Figure 10 is an enlarged view of part B of Figure 9, which mainly shows the tangled material being kneaded into a ball between the roller brush cover and the cleaning roller.

[0040] Figure 11 is a schematic diagram of the state in which the tangled material is sucked up when the scraper is in the avoidance state under one embodiment of Embodiment 1 of this application.

[0041] Figure 12 is a schematic diagram showing the relative positional relationship between the scraping component, the liquid supply component, and the cleaning roller when the scraping component is in the scraping state according to one embodiment of Embodiment 1 of this application.

[0042] Figure 13 is a schematic diagram of the structure of the floor brush housing in one embodiment of Embodiment 2 of this application;

[0043] Figure 14 is a schematic diagram of the state when the cleaning component is in the cleaning state according to one embodiment of Embodiment 2 of this application;

[0044] Figure 15 is an enlarged view of part C in Figure 14;

[0045] Figure 16 is a schematic diagram of the state when the scraper is in an avoidance state according to one embodiment of Embodiment 2 of this application.

[0046] in,

[0047] 1. Base station; 2. Upper housing; 21. Roller brush cover; 3. Lower housing; 31. Mounting cavity; 32. Lower cavity wall; 33. Scraper strip; 34. Suction port; 4. Scraping component; 41. Scraper blade; 411. Scraping section; 412. Guide section; 42. Comb teeth; 421. Arc-shaped surface; 43. First comb tooth; 431. Tooth tip; 432. Tooth root; 44. Second comb tooth; 45. Second seal; 5. Liquid supply component; 51. Liquid supply surface; 52. Guide arc surface; 6. First seal; 7. Cleaning roller; 71. Roller; 72. Cleaning cloth; 8. Upper suction channel; 9. Lower suction channel; 10. Liquid storage tank; 11. Entangled material; 12. Dirt; 13. Water flow. Detailed Implementation

[0048] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0049] Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below. It should be noted that, unless otherwise specified, the embodiments of this application and the features thereof can be combined with each other.

[0050] Furthermore, it should be understood in the description of this application that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0051] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0052] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0053] Surface cleaning devices for cleaning surfaces include handheld cleaning machines such as floor scrubbers and vacuum cleaners, and self-propelled cleaning machines such as robotic vacuum cleaners and mopping robots. Examples 1 and 2 below use floor scrubbers as examples to illustrate this application. Those skilled in the art will understand that this solution can also be applied to any of the above-mentioned surface cleaning devices for cleaning surfaces.

[0054] The surface cleaning device includes a main body and a floor brush pivotally connected to the main body. The floor brush includes a brush housing with a cleaning roller that rotates to wipe the surface to be cleaned. The cleaning roller can be a single cleaning roller, a double cleaning roller, a tracked cleaning roller, or any other wiping component that can rotate to wipe the surface to be cleaned. The brush housing also includes a liquid supply component for supplying liquid to the cleaning roller or the surface to be cleaned, a scraper component for scraping off dirt from the cleaning roller, and a suction port for absorbing dirt. The suction port, scraper component, and liquid supply component are arranged sequentially in the direction of rotation of the cleaning roller. When cleaning the surface, the liquid supply component provides cleaning liquid to wet the cleaning roller, and the surface to be cleaned is wiped as the wet cleaning roller rotates. The suction port is typically connected to a suction channel, a dirt container, and a suction motor located on the floor brush and / or the main body. The suction motor operates to generate suction force at the suction port. Some of the dirt on the surface to be cleaned enters the suction port under the suction force, while some of the dirt adhering to the cleaning roller is peeled off by the scraper and then enters the suction port under the suction force.

[0055] Example 1:

[0056] As shown in Figures 2 to 6, a surface cleaning device includes a floor brush housing and a cleaning assembly disposed on the floor brush housing. The cleaning assembly includes a cleaning roller 7, a scraping member 4 that movably abuts against the cleaning roller 7, a liquid supply member 5 disposed above the scraping member 4, and a suction port 34 disposed below the scraping member 4. The scraping member 4 can rotate relative to the liquid supply member 5 to form a circumferential sliding scraping area on the surface of the cleaning roller 7.

[0057] This application does not limit the type of liquid supplied by the liquid supply component 5. It can be water, a cleaning solution made of water and detergent, or a cleaning solution made of water, detergent, disinfectant, etc.

[0058] The scraping member 4 in this application can rotate relative to the liquid supply member 5 to contact or disengage from the cleaning roller 7, and during the rotation of the scraping member 4 to achieve position switching, a sliding scraping area along the circumference of the cleaning roller 7 can be formed on the surface of the cleaning roller 7. Taking the movement of the scraper 4 from a position away from the cleaning roller 7 to a position in contact with the cleaning roller 7 as an example, the scraper 4 will go through the following processes: no contact with the bristles on the surface of the cleaning roller 7, contact with the tip of the bristles or near the tip, rotation along the circumference of the cleaning roller 7 and contact with the root of the bristles, and even a part of the scraper 4 will detach from the root of the bristles and scoop up the bristles to move towards the tip. This process allows the scraper 4 to form a sliding scraping area on the surface of the cleaning roller 7, which not only increases the dynamic contact area between the scraper 4 and the surface of the cleaning roller 7 and improves the scraping effect, but also the rotating scraper 4 will scoop up the bristles that have fallen or even stuck to the surface of the cleaning roller 7 under the action of centrifugal force, dirt adhesion, cleaning liquid, etc., to loosen the bristles, making it easier for dirt to fall off and be collected, further improving the cleaning effect. Furthermore, during the rotation of the scraper 4, the resistance between it and the cleaning roller 7 changes from no contact to shallow contact, then to sliding along the surface of the cleaning roller 7, and finally to complete contact. This variation in resistance prevents a sudden increase in the workload of the motor driving the cleaning roller 7, thus extending the motor's lifespan. Additionally, as the scraper 4 moves from tangential contact to complete contact, the cleaning roller 7 continues to rotate, and the bristles on the cleaning roller 7 also wipe the upper surface of the scraper 4, significantly reducing the amount of dirt accumulation on its surface. This eliminates the need for users to clean the scraper 4 separately, improving the user experience. From another perspective, the rotational motion of the scraper 4 ensures a relatively gentle contact and separation process with the cleaning roller 7, reducing the hard pressure exerted by the scraper 4 on the bristles of the cleaning roller 7 and providing excellent protection for the bristles. When the rotational motion of the scraper 4 is applied to the self-cleaning process of the surface cleaning device, the rotational motion of the scraper 4 will scrape up and loosen the tufts of hair on the cleaning roller 7, thereby facilitating hot air circulation, improving the drying efficiency of the cleaning roller 7, and preventing the cleaning roller 7 from being in a humid environment for a long time and thus breeding bacteria.

[0059] The rotational motion of the scraping component 4 in this application can exist not only in the cleaning process but also in the self-cleaning process of the surface cleaning device, and is particularly suitable for the self-cleaning process. Taking the self-cleaning process as an example, as shown in Figure 1, the surface cleaning device is placed on the base station 1 and the automatic cleaning mode is turned on. During the automatic cleaning process, the cleaning roller 7 rotates. When the scraping component 4 is in contact with the cleaning roller 7, the scraping component 4 continuously scrapes the bristles on the cleaning roller 7 to scrape off the dirt or grime on the cleaning roller 7. After the scraping component 4 has been scraping the bristles on the cleaning roller 7 for a certain period of time, the scraping component 4 rotates to deflect away from the cleaning roller 7, thereby forming a circumferential sliding scraping area on the surface of the cleaning roller 7. This allows the dirt or grime scraped off by the scraping component 4 to be carried away from the cleaning roller 7 by the scraping component 4 and sucked to the suction port 34 of the surface cleaning device, thus improving the treatment effect of dirt. In this process, assuming that hair or other tangled material 11 is wrapped around the cleaning roller 7, the tangled material 11 will be pulled loose by the movement of the scraper 4 when the scraper 4 moves. With the reverse rotation of the cleaning roller 7, as shown in Figures 9 and 10, the tangled material 11 will detach from the cleaning roller 7 and be kneaded into a ball between the cleaning roller 7 and the suction port 34 through the forward and reverse movements of the cleaning roller 7. During this process, an upper suction channel 8 is formed between the roller brush cover 21 and the upper surface of the cleaning roller 7. Under the action of the suction motor, as shown in Figure 11, the kneaded tangled material 11 will be relatively easily sucked into the suction port 34, thereby improving the treatment effect of hair and other tangled material 11. During this process, if there are stuck dirt particles between the scraper 4 and the cleaning roller 7, between the scraper 4 and the suction port 34, and / or between the cleaning roller 7 and the liquid supply component 5, the dirt particles will also be loosened due to the movement of the scraper 4. The lower surface of the cleaning roller 7 and the floor scraper strip 33 of the floor brush housing form a lower suction channel 9 that communicates with the suction port 34. When the scraper 4 moves to a position away from the cleaning roller 7, the space between the roller brush cover 21 and the upper surface of the cleaning roller 7 is completely opened, forming an upper suction that communicates with the suction port 34. With the upper suction channel 8 fully open, under the action of the suction motor, the tangled material 11, the liquid, and the loosened dirt that were carried away from the cleaning roller 7 by the scraping part 4 are sucked into the suction port 34 from the upper suction channel 8 and the lower suction channel 9 respectively. This allows the tangled material 11, the liquid, and the dirt to be drawn into the sludge container through the suction port 34, thoroughly improving the tangling of hair and other tangled materials 11 on the cleaning roller 7 and collecting them effectively. This improves the self-cleaning effect of the cleaning roller 7 and greatly enhances the efficiency of self-cleaning.During this process, as the scraper 4 moves from a position away from the cleaning roller 7 to a position in contact with the cleaning roller 7, the movement of the scraper 4 loosens the dirt adhering to the suction port 34. The dirt clamped between the scraper 4 and the suction port 34 also loosens and detaches from the suction port 34, and is carried away by the scraper 4 back to the cleaning roller 7. This greatly reduces the accumulation of dirt at the suction port 34, saving the user the trouble of cleaning the suction port 34 separately and improving the user experience.

[0060] In a preferred embodiment of this example 1, the sliding angle of the scraper 4 along the circumference of the cleaning roller 7 is α, where α satisfies: 4°≤α≤10°. The front end of the scraper 4 is provided with a plurality of first comb teeth 43 arranged at intervals along the axial direction of the cleaning roller 7. Figure 3 shows a schematic diagram of a first state in which both the scraper 41 and the first comb teeth 43 are in contact with the cleaning roller 7. In this state, the angle between the upper surface of the scraper 41 and the horizontal direction is 35°. Figure 4 shows a schematic diagram of a second state in which the scraper 4 rotates towards the suction port 34, and the front end of the scraper 41 is still in contact with the cleaning roller 7, while the front ends of the first comb teeth 43 have just disengaged from the cleaning roller 7 or are in shallow contact with the surface of the cleaning roller 7. In this state, the angle between the upper surface of the scraper 41 and the horizontal direction is 37°. Figure 5 shows a schematic diagram of the third state where the scraper 4 continues to rotate towards the suction port 34, and the front end of the scraper 41 has shallow contact with the surface of the cleaning roller 7, while the front end of the first comb tooth 43 is completely disengaged from the cleaning roller 7. In this state, the angle between the upper surface of the scraper 41 and the horizontal direction is 39°. Figure 6 shows a schematic diagram of the fourth state where the scraper 4 continues to rotate towards the suction port 34, and the front end of the scraper 41 has just disengaged from the surface of the cleaning roller 7, while the front end of the first comb tooth 43 is completely disengaged from the cleaning roller 7. In this state, the angle between the upper surface of the scraper 41 and the horizontal direction is 40°. From the first state to the fourth state, the sliding angle of the scraper 4 along the circumference of the cleaning roller 7 is 5°. However, this embodiment 1 is not limited to this; the sliding angle of the scraper 4 along the circumference of the cleaning roller 7 can be 4°, 7°, 8°, 10°, etc.

[0061] In this embodiment, during the circumferential sliding of the scraper 4 along the cleaning roller 7, the sliding angle α satisfies 4°≤α≤10°. This increases the depth to which the scraper 4 penetrates into the bristles of the cleaning roller 7, allowing it to move smoothly from the depths of the bristles to the tips. This removes dirt or debris from the depths of the bristles, effectively peeling away the tightly wrapped material 11. Simultaneously, it reduces the impact of the scraper 4's movement on the cleaning roller 7, decreasing the reaction force on the drive motor that drives the roller 7 and thus reducing the impact on the motor's lifespan. Furthermore, by optimizing the sliding angle, the dirt removal process can be better controlled, reducing the probability of dirt being flattened on the surface of the cleaning roller 7 or near the suction port 34 during the scraper 4's movement, thereby improving the cleaning effect.

[0062] As a preferred embodiment of this Example 1, as shown in Figures 2 and 3, the floor brush housing includes an upper housing 2 and a lower housing 3. The upper front side of the lower housing 3 has a forward-opening mounting cavity 31, and the lower front side of the lower housing 3 has a suction port 34 located below the mounting cavity 31. The lower cavity wall 32 of the mounting cavity 31 forms part of the top wall of the suction port 34. The scraping component 4 is slidably disposed in the mounting cavity 31 relative to the liquid supply component 5. In this embodiment, the mounting cavity 31 provides motion guidance and space for the rotational movement of the scraping component 4, making the rotational movement of the scraping component 4 more reliable and stable. This significantly reduces the probability of the floor brush housing shaking or vibrating due to the rotational movement of the scraping component 4, thereby reducing the impact of the scraping component 4's rotation on the rotation of the cleaning roller 7, and ensuring the stability of the cleaning roller 7's operation. The lower cavity wall 32 of the mounting cavity 31 forms part of the top wall of the suction port 34, achieving a compact layout of the structure, reducing space occupation, making the floor brush housing more compact, and facilitating integration into the surface cleaning device, which helps to miniaturize the floor brush housing. As shown in Figure 3, the mounting cavity 31 is located above the suction port 34, and the lower cavity wall 32 of the mounting cavity 31 forms part of the top wall of the suction port 34. This allows the suction port 34 to extend forward and cooperate with the cleaning roller 7 and the scraper 4 to form a suction chamber when the scraper 4 rotates to contact the cleaning roller 7. Compared with the prior art, which moves the scraper back and forth to contact the cleaning roller, when the comb tooth 42 of the scraper 4 rotates to contact the cleaning roller 7, the suction chamber is extended along the comb tooth 42 to the cleaning roller 7, further expanding the volume of the suction chamber. A suction chamber with a wide front end and a narrow rear end can be formed between the comb tooth 42, the cleaning roller 7, and the suction port 34. Under the action of the suction motor, this expanded suction chamber will form a siphon effect, improving the suction effect and further enhancing the suction efficiency.

[0063] In this embodiment 1, the scraper 4 can rotate relative to the liquid supply 5 so that the scraper 4 can have any of the following states:

[0064] Example 1: The scraper 4 has a first position that abuts against the cleaning roller 7 and a second position that disengages from the cleaning roller 7 and brings the front end of the scraper 4 close to the suction port 34. The scraper 4 rotates between the first and second positions. In the second position, the scraper 4 disengages from the cleaning roller 7 and abuts against the front end of the lower cavity wall 32. That is, the scraper 4 rotates between the first and second positions to have a scraping state that abuts against the cleaning roller 7 and a avoidance state that disengages from the cleaning roller 7 and abuts against the front end of the lower cavity wall 32. Figure 8 shows a schematic diagram of the scraper 4 in the scraping state; Figure 7 shows a schematic diagram of the scraper 4 in the avoidance state. When the scraper 4 abuts against the cleaning roller 7 in the first position, it can effectively scrape off the dirt adsorbed on the cleaning roller 7, and can form a closed lower suction channel 9 between the scraper 4, the cleaning roller 7, the surface to be cleaned, and the suction port 34, which helps to ensure the suction force of the lower suction channel 9, thereby improving the dirt suction effect. When the scraper 4 is in the second position, the scraper 4 is disengaged from the cleaning roller 7 and the front end of the scraper 4 is close to the suction port 34, which helps to guide the scraped dirt to the suction port 34, improves the collection efficiency of dirt, and in the avoidance state, it can reduce the wear of the scraper 4 on the cleaning roller 7, extend the service life of the cleaning roller 7, and reduce the rotational resistance of the cleaning roller 7, reduce the load on the drive motor used to drive the rotation of the cleaning roller 7, thereby reducing energy consumption.

[0065] Example 2: The scraper 4 has a first position that abuts against the cleaning roller 7 and a second position that disengages from the cleaning roller 7 and brings the front end of the scraper 4 close to the suction port 34. The scraper 4 rotates between the first position and the second position to have a scraping state that abuts against the cleaning roller 7, a clearance state that disengages from the cleaning roller 7 and stops against the front end of the lower cavity wall 32, and an intermediate state between the scraping state and the clearance state. The scraper 4 has an intermediate state between the scraping state and the avoidance state. This intermediate state can be a state in which the scraper 4 has shallow contact with the surface of the cleaning roller 7 (i.e., the amount of contact between the scraper 4 and the surface of the cleaning roller 7 in the intermediate state is less than the amount of contact between the scraper 4 and the surface of the cleaning roller 7 in the scraping state), or a state in which the scraper 4 has no contact with the surface of the cleaning roller 7 and the front end of the scraper 4 is between the surface of the cleaning roller 7 and the suction port 34 (i.e., the position when it is not rotated to the avoidance state). That is, the scraper 4 can also have a third position, a fourth position or even more positions between the first position and the second position. The existence of intermediate states makes the dwell position of the scraper 4 more possible, so that the position of the scraper 4 can be adjusted according to actual needs to meet different cleaning effects.

[0066] Preferably, as shown in FIG8, the cleaning roller 7 includes a roller 71 and a cleaning cloth 72 sleeved on the roller 71. When the scraper 4 is in the scraping state, the scraper 4 is located above the rotation center of the roller that is in contact with the scraper 4. The scraper 4 rotates circumferentially along the surface of the cleaning roller 7, and the dirt and sewage follow the scraper 4. Under the action of the centrifugal force of the scraper 4, a suction chamber communicating with the suction port 34 is formed along the rotation trajectory of the scraper 4, which further expands the guiding effect of dirt and sewage to the suction port 34, thereby expanding the suction area and extending the suction area to the upper part of the cleaning roller 7 near the cleaning roller 7. In particular, when the scraper 4 moves to the vicinity of the suction port 34, the upper suction channel 8 of the upper part of the cleaning roller 7 is fully opened, which is more conducive to the suction of dirt and sewage.

[0067] As a preferred embodiment of this example 1, as shown in FIG. 7, the scraping member 4 further includes a comb tooth portion 42. The front end of the comb tooth portion 42 is provided with a plurality of first comb teeth 43 arranged at intervals along the axial direction of the cleaning roller 7. The comb tooth portion 42 can abut against the front end of the lower cavity wall 32 through the tooth roots 432 of the first comb teeth 43. The scraper 41 is located above the comb tooth portion 42. The first comb teeth 43 can move synchronously with the rotation of the scraping member 4 to loosen and scrape up the tufts on the cleaning roller 7 during contact with the cleaning roller 7, thereby helping to scrape off the dirt 12 attached to the surface of the cleaning roller 7 and improving the cleaning effect. The first comb teeth 43 are arranged at intervals along the axial direction of the cleaning roller 7, which can form a gap between two adjacent first comb teeth 43 to facilitate the downward flow of dirt and sludge, so that the dirt 12 scraped off by the scraper 41 and the first comb teeth 43 can flow downward through the gap and be sucked away by the suction port 34. The root 432 of the first comb tooth 43 abuts against the front end of the lower cavity wall 32, thereby limiting the rotational movement of the scraper 4 and improving the positional accuracy of the scraper 4.

[0068] Furthermore, as shown in Figure 7, in the avoidance state, the tip 431 of the first comb tooth 43 is not lower than the inner surface of the top wall of the suction port 34. That is, when the front end of the comb tooth 42 abuts against the front end of the lower cavity wall 32 through the root 432 of the first comb tooth 43, the tip 431 of the first comb tooth 43 is not lower than the inner surface of the top wall of the suction port 34. This can prevent the tip 431 of the first comb tooth 43 from blocking the dirt moving towards the suction port 34, and can maximize the front end of the suction port 34 to be in a fully open state, which is convenient for the suction port 34 to collect dirt. It also greatly reduces the probability that dirt will wrap around the tip 431 of the first comb tooth 43 and rotate with the first comb tooth 43 to be re-adhered to the surface of the cleaning roller 7.

[0069] From another perspective, when the scraper 4 is in the avoidance state, the root 432 of the first comb tooth 43 abuts against the front end of the lower cavity wall 32, while the tip 431 of the first comb tooth 43 is not lower than the inner surface of the top wall of the suction port 34. Therefore, the first comb tooth 43 can shield the joint between the comb tooth part 42 and the lower cavity wall 32 of the mounting cavity 31. When the scraper 4 is in the avoidance state, the upper suction channel 8 between the scraper 4 and the outer surface of the cleaning roller 7 is fully opened. Under the suction of the suction port 34, dirt, clumps of hair, and drained liquid above the cleaning roller 7 will move towards the suction port 34 through the upper suction channel 8. The shielding of the joint between the comb tooth part 42 and the lower cavity wall 32 of the mounting cavity 31 by the first comb tooth 43 can prevent dirt and liquid from splashing onto the joint between the comb tooth part 42 and the lower cavity wall 32 of the mounting cavity 31 during the suction process. This not only prevents the accumulation of dirt 12 at the joint but also prevents dirt 12 from entering the floor brush housing through the joint, thereby effectively protecting the electronic components inside the floor brush housing.

[0070] A first sealing element 6 is provided between the lower surface of the comb teeth 42 and the lower cavity wall 32 of the mounting cavity 31. Furthermore, as shown in Figures 7 and 8, the first sealing element 6 is located at the front end of the lower cavity wall 32, and abuts against the lower surface of the comb teeth 42 to achieve a dynamic seal. Adding the first sealing element 6 at the front end of the lower cavity wall 32 allows the first sealing element 6 to form a dynamic seal with the moving comb teeth 42, thereby preventing dirt from entering the interior of the floor brush housing through the gap between the scraper 4 and the lower cavity wall 32, thus helping to protect the electronic components inside the floor brush housing. Moreover, as the scraper 4 rotates along the mounting cavity 31, the first sealing element 6 abuts against the comb teeth 42, providing excellent wiping action on the lower surface of the comb teeth 42, preventing dirt accumulation on the lower surface of the comb teeth 42, and reducing the user's cleaning burden.

[0071] Furthermore, the front end of the first seal 6 is provided with an upwardly protruding sealing lip, which abuts against the lower surface of the comb tooth portion 42 to form a dynamic seal. By abutting against the lower surface of the comb tooth portion 42 with the protruding sealing lip, the contact area between the first seal 6 and the comb tooth portion 42 can be reduced, thereby reducing the rotational resistance applied to the comb tooth portion 42 by the first seal 6 during the rotation of the comb tooth portion 42, facilitating smooth switching of the scraper 4 position.

[0072] In this embodiment 1, the connection method between the first seal 6 and the lower cavity wall 32 of the mounting cavity 31 is not limited. In one example, the first seal 6 is installed on the front end of the lower cavity wall 32 by fasteners such as screws. In another example, the first seal 6 is fixed to the front end of the lower cavity wall 32 by adhesive. In yet another example, the first seal 6 and the lower cavity wall 32 are formed by two-material injection molding to further improve the stability of the connection between them.

[0073] As a preferred embodiment of this embodiment 1, as shown in FIG3, the comb tooth part 42 has an arc-shaped surface 421 tangent to the lower cavity wall 32. The first comb tooth 43 is disposed at the front of the arc-shaped surface 421. The bottom of the groove of the first comb tooth 43 is smoothly connected to the arc-shaped surface 421. When the scraping member 4 is in the scraping state of contacting the cleaning roller 7, the tooth tip 431 of the first comb tooth 43 abuts against the cleaning roller 7. In this embodiment, the bottom of the groove of the first comb tooth 43 is smoothly connected to the arc-shaped surface 421. The so-called smooth connection does not refer to the roughness at the connection position between the bottom of the groove of the first comb tooth 43 and the arc-shaped surface 421, but rather to the smooth transition area between the bottom of the groove of the first comb tooth 43 and the arc-shaped surface 421. This transition area has no obvious steps or sharp inner corners, so that when dirt or liquid moves through the first comb tooth 43 to the bottom of its groove, the dirt or liquid can move smoothly to the arc-shaped surface 421 through this transition area, thereby greatly reducing the probability of dirt or liquid getting stuck between the bottom of the groove of the first comb tooth 43 and the arc-shaped surface 421. In this embodiment, the comb tooth portion 42 has an arc-shaped surface 421 tangent to the lower cavity wall 32. This allows the scraper 4 to rotate from a state of contact with the cleaning roller 7 to a state of moving away from the cleaning roller 7. During this rotation, a portion of the dirt scraped off by the scraper 4 will be thrown towards the suction port 34 along the arc-shaped surface 421 under centrifugal force, rather than being thrown towards the top of the suction port 34 or above it. This reduces the probability of dirt accumulating at the top of the suction port 34 and also reduces the probability of dirt entering the floor brush housing through the gap between the scraper 4 and the mounting cavity 31. This helps to protect the electronic components inside the floor brush housing. As the scraper 4 rotates from a position away from the cleaning roller 7 to a position in contact with the cleaning roller 7, dirt or liquid can also move towards the cleaning roller 7 through the bottom of the groove of the first comb tooth 43 following the centrifugal force of the arc surface 421. This allows the dirt or liquid to return to the bristles of the cleaning roller 7, or, under the action of gravity, fall from the arc surface 421 into the vicinity of the suction port 34 and be sucked away by the suction motor through the suction port 34. This prevents the accumulation of dirt or liquid on the arc surface 421, reducing the cleaning burden on the user for the comb tooth part 42.

[0074] As shown in Figure 3, when the scraping component 4 is in the scraping state of contacting the cleaning roller 7, the tips 431 of the first comb teeth 43 abut against the cleaning roller 7. This arrangement creates a space between the roots 432 of the first comb teeth 43 and the outer surface of the cleaning roller 7, facilitating the downward flow of dirt or liquid, and making it easier to collect and process the dirt or liquid.

[0075] As a preferred embodiment of this Example 1, as shown in FIG8, the liquid supply component 5 has a liquid supply surface 51, the liquid supply surface 51 is provided with a liquid supply port, and the scraping component 4 includes a scraper 41 extending toward the cleaning roller 7. When the scraping component 4 is in the scraping state of contacting the cleaning roller 7, the scraper 41 abuts against the cleaning roller 7, and the scraper 41, the liquid supply surface 51 and the outer surface of the cleaning roller 7 cooperate to form a liquid storage tank 10. During the cleaning process, some dirt is thrown onto the liquid supply component 5 and the roller brush cover 21 as the cleaning roller 7 rotates. This part of the dirt 12 is not easy to remove. In this embodiment, the scraper 41 is made to abut against the cleaning roller 7 to form a liquid storage tank 10 between the scraper 41, the liquid supply surface 51 and the outer surface of the cleaning roller 7. At this time, the water pump works and the cleaning liquid accumulates in the liquid storage tank 10. With the low-speed reverse rotation of the cleaning roller 7, the dirt on the cleaning roller 7 is squeezed by the scraper. During the rotation of the cleaning roller 7, the cleaning liquid in the liquid storage tank 10 will surge upward and form a pulse water flow 13, which can wash away the dirt on the liquid supply component 5 and the roller brush cover 21, greatly reducing the residue of dirt on the liquid supply component 5 and the roller brush cover 21. After rinsing, the scraper 4 rotates away from the cleaning roller 7, thereby forming an upper suction channel 8 between the scraper 4 and the outer peripheral surface of the cleaning roller 7. The dirty liquid and dirt in the liquid storage tank 10 will flow downward along the upper suction channel 8 and be sucked into the suction port 34, thereby improving the cleaning effect.

[0076] As a preferred embodiment of this Example 1, as shown in Figures 3 to 6, the liquid supply component 5 has an arc-shaped liquid supply surface 51 and a guide arc surface 52 tangent to the liquid supply surface 51. The scraping component 4 includes a scraper 41 extending toward the cleaning roller 7. The scraper 41 includes a connected scraping section 411 and a guide section 412. The guide section 412 slides along the guide arc surface 52, and a second sealing member 45 is provided on the scraper 41 between the guide section 412 and the guide arc surface 52. The second sealing member 45 rotates with the scraping component 4 to wipe the liquid supply component 5. In this embodiment, the guide section 412 can provide guidance for the movement of the scraping component 4, thereby improving the reliability and stability of the rotational movement of the scraping component 4. Furthermore, the scraping component 4 rotates along the guide arc surface 52, minimizing the reaction force of the guide arc surface 52 on the scraping component 4. This results in a smaller impact on the power component that drives the scraping component 4. In particular, when the scraping component 4 changes its rotation direction, the power component operates smoothly, preventing vibration or jumping of the floor brush housing due to jumping of the power component. This would not affect the self-cleaning operation or even cause unstable rotational connection between the floor brush and the cleaning roller 7, leading to overload of the drive motor of the cleaning roller 7 and affecting the service life of the motor.

[0077] This embodiment does not limit the connection method between the scraper 41 and the second seal 45. In one example, the scraper 41 and the second seal 45 are connected by screws. In another example, the second seal 45 is glued to the scraper 41. In yet another example, the scraper 41 and the second seal 45 are formed by two-material injection molding.

[0078] A second sealing element 45 is provided on the scraper 41 between the guide section 412 and the guide arc surface 52. This creates a dynamic seal between the scraper 41 and the liquid supply surface 51, preventing dirt and liquid from entering the interior of the floor brush housing through the gap between the scraper 41 and the liquid supply element 5, thus protecting the electronic components inside the floor brush housing. The close contact between the second sealing element 45 and the guide arc surface 52 allows the second sealing element 45 to effectively wipe the guide arc surface 52 during the rotation of the scraper element 4, reducing the probability of dirt accumulating on the liquid supply element 5.

[0079] Furthermore, as shown in Figure 7, the second seal 45 has a body portion located between the guide arc surface 52 and the guide segment 412. The extension length of the body portion along the guide arc surface 52 is greater than the extension length of the guide segment 412 along the guide arc surface 52, so that the second seal 45 can form a larger wiping area on the liquid supply component 5 during the rotational movement with the scraper 4, thereby improving the wiping coverage of the liquid supply component 5.

[0080] As shown in Figure 12, the upper surface of the second seal 45 forms an angle γ with the tangent direction of the guide arc surface 52. Preferably, the angle γ satisfies 70°≤γ≤90°. This arrangement allows for better guidance of dirt and liquid through the upper surface of the second seal 45 when the scraper 4 is in the avoidance state, facilitating the suction of dirt and liquid through the opened upper suction channel 8 into the suction port 34. Furthermore, when the scraper 4 is in the scraping state, the upper surface of the second seal 45 provides some obstruction to the liquid sprayed from the liquid supply port, storing it in the water tank. This allows the liquid to surge upwards under the rotation of the cleaning roller 7, forming a pulsed water flow 13, which facilitates the flushing of the liquid supply component 5 and the roller brush cover 21.

[0081] Example 2:

[0082] The structure and principle of this embodiment 2 are basically the same as those of embodiment 1, the difference being the number of comb teeth.

[0083] As shown in Figure 13, in this embodiment 2, the scraping component 4 also includes several first comb teeth 43 and several second comb teeth 44 distributed along the axial direction of the cleaning roller 7. The second comb teeth 44 are located above the first comb teeth 43, and the first comb teeth 43 and second comb teeth 44 are arranged alternately and staggeredly. During the cleaning operation and self-cleaning operation, the first comb teeth 43 and second comb teeth 44 mainly serve to peel off the dirt 12 on the cleaning component and remove the hair entanglement on the cleaning roller 7. The alternating and staggered arrangement of the first comb teeth 43 and second comb teeth 44 can reduce the resistance on the cleaning roller 7 in the axial direction while ensuring that the cleaning roller 7 can be scraped by the comb teeth of the first comb teeth 43 or the comb teeth 44 in its axial direction. The first comb teeth 43 and second comb teeth 44 improve the peeling effect of dirt by cooperating arrangement. Moreover, there is a gap between the tooth roots 432 of the first comb teeth 43 and the tooth roots 432 of the second comb teeth 44 for the flow of dirt and sewage, which facilitates the suction port 34 to suck up dirt and sewage.

[0084] When the scraping component 4 is in the scraping state of contacting the cleaning roller 7, the tips 431 of the first comb tooth 43 and the tips 431 of the second comb tooth 44 are both in contact with the cleaning roller 7.

[0085] As a preferred embodiment of this Example 2, as shown in Figures 14 and 15, the front tooth surfaces of the first comb tooth 43 and the second comb tooth 44 are not parallel, and the angle β1 formed by the front tooth surface of the first comb tooth 43 and the horizontal direction is smaller than the angle β2 formed by the front tooth surface of the second comb tooth 44 and the horizontal direction. The front tooth surfaces of the first comb tooth 43 and the second comb tooth 44 have an angle β, where β satisfies: 0°≤β≤15°. By rationalizing the value of the angle β between the front tooth surfaces of the first comb tooth 43 and the second comb tooth 44, on the one hand, it can be ensured that when the scraping component 4 is in contact with the cleaning roller 7, both the first comb tooth 43 and the second comb tooth 44 can have a suitable interference fit with the cleaning roller 7, ensuring the scraping effect on the cleaning roller 7. On the other hand, it can also reduce the probability of dirt, especially hair, getting tangled on the second comb tooth 44, thus improving the cleaning effect of the scraping component 4 itself.

[0086] As a preferred embodiment of this second embodiment, as shown in FIG16, the length D1 of the first comb tooth 43 is greater than the length D2 of the second comb tooth 44. As shown in FIG16, the upper surface of the comb tooth portion 42 is in contact with the scraper 41, and the rotation trajectory of the scraper 41 is within the rotation trajectory of the first comb tooth 43. The length of the scraper 41 extending out of the comb tooth portion 42 is less than the length D2 of the second comb tooth 44. With this arrangement, the scraper 41, the first comb tooth 43 and the second comb tooth 44 penetrate into the bristles of the cleaning roller 7 at different depths. During the rotation of the scraping component 4, the scraper 41, the first comb tooth 43 and the second comb tooth 44 cooperate with each other to clean the bristles inside the cleaning roller 7 from the inside out, resulting in a better cleaning effect. At the same time, it can also remove dirt 12 located at different positions within the bristles of the cleaning roller 7. As the scraper 4 rotates to contact the cleaning roller 7, it ensures that the scraper 4 and the first comb tooth 43 have sufficient contact surface with the bristles of the cleaning roller 7. Furthermore, the second sealing member 45 continuously scrapes the front surface of the liquid supply member 5, pushing the dirt on the liquid supply member 5 back to the bristles of the cleaning roller 7 for concentrated cleaning. Additionally, when the scraper 4 rotates from the avoidance state to the scraping state, it can clean dirt from a portion of the upper surface of the scraper 41, the front tooth surface of the first comb tooth 43, and the front tooth surface of the second comb tooth 44 by contacting the bristles. When the scraper 4 switches from the scraping state to the avoidance state, the first comb tooth 43, the second comb tooth 44, and the scraper 41 can successively disengage from the cleaning roller 7, forming a circumferential sliding scraping area on the surface of the cleaning roller 7, thus improving the scraping effect.

[0087] For any parts not mentioned in this application, existing technologies may be used or referenced.

[0088] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0089] The above descriptions are merely embodiments of this application and are not intended to limit this application. The technical features or structures in the foregoing different embodiments can be arbitrarily combined to form other specific technical solutions as needed. For those skilled in the art, this application can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this application should be included within the scope of the claims of this application.

Claims

1. A surface cleaning device, comprising a floor brush housing and a cleaning assembly disposed on the floor brush housing, the cleaning assembly comprising a cleaning roller, a scraping element movably abutting against the cleaning roller, a liquid supply element disposed above the scraping element, and a suction port disposed below the scraping element, characterized in that, The scraping element can rotate relative to the liquid supply element to form a circumferential sliding scraping zone on the surface of the cleaning roller.

2. The surface cleaning device according to claim 1, characterized in that, The sliding angle of the scraper along the circumference of the cleaning roller is α, and α satisfies: 4°≤α≤10°.

3. The surface cleaning device according to claim 1, characterized in that, The front side of the floor brush housing is provided with a mounting cavity with an opening facing forward, and the front side of the floor brush housing is also provided with a suction port. The lower cavity wall of the mounting cavity forms part of the top wall of the suction port, and the scraping component is slidably disposed in the mounting cavity relative to the liquid supply component.

4. A surface cleaning device according to claim 3, characterized in that, The scraper has a first position that abuts against the cleaning roller and a second position that disengages from the cleaning roller and brings the front end of the scraper close to the suction port. The scraper rotates between the first position and the second position. When the scraper is in the second position, it disengages from the cleaning roller and abuts against the front end of the lower cavity wall.

5. A surface cleaning device according to claim 3, characterized in that, The scraping component also includes a comb tooth section. The front end of the comb tooth section is provided with a plurality of first comb teeth arranged at intervals along the axial direction of the cleaning roller. The comb tooth section can abut against the front end of the lower cavity wall through the root of the first comb teeth. The tip of the first comb teeth is not lower than the inner surface of the top wall of the suction port.

6. A surface cleaning device according to claim 5, characterized in that, The front end of the lower cavity wall is provided with a first sealing element, which abuts against the lower surface of the comb teeth to achieve dynamic sealing.

7. A surface cleaning device according to claim 5, characterized in that, The comb tooth portion has an arc-shaped surface tangent to the lower cavity wall. The first comb tooth is located at the front of the arc-shaped surface. The bottom of the groove of the first comb tooth is smoothly connected to the arc-shaped surface. When the scraping component is in the scraping state of contacting the cleaning roller, the tip of the first comb tooth abuts against the cleaning roller.

8. A surface cleaning device according to claim 1, characterized in that, The scraping component further includes a plurality of first comb teeth and a plurality of second comb teeth distributed along the axial direction of the cleaning roller. The second comb teeth are located above the first comb teeth. The first comb teeth and the second comb teeth are arranged alternately and staggered. The front tooth surfaces of the first comb teeth and the front tooth surfaces of the second comb teeth have an included angle β, wherein β satisfies: 0°≤β≤15°.

9. A surface cleaning device according to claim 1, characterized in that, The liquid supply component has a liquid supply surface and a liquid supply port. The scraping component includes a scraper extending toward the cleaning roller. When the scraping component is in a scraping state that is in contact with the cleaning roller, the scraper abuts against the cleaning roller, and the scraper, the liquid supply surface and the outer surface of the cleaning roller cooperate to form a liquid storage tank.

10. A surface cleaning device according to claim 1, characterized in that, The liquid supply component has an arc-shaped liquid supply surface and a guide arc surface that is externally tangent to the liquid supply surface. The scraping component includes a scraper extending toward the cleaning roller. The scraper includes a scraping section and a guide section connected together. The guide section slides along the guide arc surface, and the scraper is provided with a second sealing member located between the guide section and the guide arc surface. The second sealing member rotates with the scraping component to wipe the liquid supply component.

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