Patent Description:
Cleaning tools are an extremely important product in people's daily work and life. With the gradual advancement of the automation process, more and more electric cleaning tools have appeared in people's lives, such as vacuum cleaners, sweepers and mopping machines, etc. The mopping machine is usually provided with one rolling brush or two circular throwing discs, a surface to be cleaned is wiped by driving the rolling brush or the throwing disc to rotate. In addition, in order to improve the cleaning effect, water is usually sprayed before or during the wiping process. However, due to a limited ability of the mopping machine to recycle dirty liquid, the cleaned surface after wiping with the mopping machine is slippery. When the user walks on the cleaned surface, on the one hand, the cleaned surface may be soiled again, on the other hand, it may cause the user to slip, which adversely affects the personal safety of the user.

<CIT> discloses a mopping machine comprising a handle and a roller brush body, wherein the roller brush body is a hollow structure. A front roller brush and a rear roller brush are detachably arranged in the roller brush body, a motor is arranged in the roller brush body which is used to control the rotation of the front roller brush and the rear roller brush. A sewage tank is arranged between the front roller brush and the rear roller brush.

<CIT> discloses a water leakage prevention device for a mopping machine, comprising a floor brush body, two roller brushes arranged inside the floor brush body, and an arc-shaped guide plate arranged on the periphery of the roller brush. The arc-shaped guide plate between the two roller brushes and the bottom surface of the floor brush body form a sewage tank of which the opening is upward.

The present invention discloses a cleaning device to solve a problem that because a cleaned surface is slippery after a mopping machine clean the surface, when a user walks on the cleaned surface, on the one hand, the cleaned surface may be soiled again, on the other hand, it may cause the user to slip, which adversely affects the personal safety of the user.

In order to solve the above problem, the present invention provides a cleaning device as defined in claim <NUM>.

The technical solution provided in the present invention can achieve the following beneficial effects.

The plurality of rolling brushes in the cleaning device provided by the present invention can be rotated under the driving of the driving mechanism, and the dirty liquid adsorbed by the plurality of rolling brushes can be collected into the dirty liquid accommodating mechanism, thereby reducing the amount of dirty liquid remaining on the cleaned surface. Furthermore, the plurality of rolling brushes include the front rolling brush and the rear rolling brush. In the moving direction of the rolling brushes, the front rolling brush is located in front of the rear rolling brush, and at least a part of the projection of the front rolling brush is located in the projection of the rear rolling brush, which can ensure that the rear rolling brush can cover at least a part of the moving track of the front rolling brush during the movement process, so that under the action of the rear rolling brush, the cleaned surface that has been wiped by the front rolling brush is wiped twice, which can further absorb the dirty liquid on the surface to be cleaned, improve the dryness of the cleaned surface, prevent the cleaned surface from being soiled again and prevent the user from slipping because the cleaned surface is slippery when the user walks on the surface that has just been cleaned.

The above and other objects, features and advantages of the invention become clearer through a more specific description of the preferred embodiments of the invention shown in the accompanying drawings. In all the drawings, the same reference numerals indicate the same parts, and the drawings are not deliberately scaled according to the actual size, with the focus on showing the main thrust of the invention.

Description of reference numbers: <NUM>, housing; <NUM>, main body; <NUM>, ending cover; <NUM>, sewage liquid accommodating mechanism; <NUM>, liquid collecting portion; <NUM>, first liquid collecting area; <NUM>, second liquid collecting area; <NUM>, liquid collecting cavity; <NUM>, avoidance notch; <NUM>, pushing button; <NUM>, handing element; <NUM>, hinge; <NUM>, front wiping strip; <NUM>, liquid guiding portion; <NUM>, rear wiping strip; <NUM>, splash-proof flange; <NUM>, upper cover <NUM>; <NUM>, top covering portion; <NUM>, liquid collecting port; <NUM>, capping wall; <NUM>, blocking wall; 273a, first guiding section; 273b, second guiding section; <NUM>, liquid guiding wall; <NUM>, front rolling brush; <NUM>, rear rolling brush; <NUM>, cleaning portion; <NUM>, mounting portion; <NUM>, inner cavity; <NUM>, driving mechanism; <NUM>, motor; <NUM>, casing; <NUM>, driving shaft; <NUM>, driving button; <NUM>, bearing; <NUM>, handle; <NUM>, universal joint; <NUM>, liquid spraying mechanism; <NUM>, liquid supplying portion; <NUM>, spraying portion; <NUM>, pump.

In order to make the objects, features and advantages of the present invention more obvious and easier to understand, the specific embodiments of the present invention are described in detail below in combination with the accompanying drawings. Many specific details are set forth in the following description to facilitate a full understanding of the invention. However, the present invention can be implemented in many ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the invention. Therefore, the invention is not limited by the specific embodiments disclosed below.

The technical solutions provided by some embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in <FIG>, an embodiment of the present invention discloses a cleaning device including a housing <NUM>, a dirty liquid accommodating mechanism <NUM>, a driving mechanism <NUM>, and a plurality of rolling brushes.

As shown in <FIG>, as a mounting base for other components, the housing <NUM> can be made of materials such as plastic or metal, etc., and its size and shape can be flexibly selected according to the structure of other elements in the cleaning device.

The number of rolling brushes can be determined according to an actual situation, and it can be two, three, four or more. The plurality of rolling brushes are mounted on the housing <NUM>, the plurality of rolling brushes can be cylindrical structures, and the sizes of the rolling brushes can be the same or different from each other. As shown in <FIG>, the rolling brush includes a cleaning portion <NUM> and a mounting portion <NUM>. The cleaning portion <NUM> surrounds an outer periphery of the mounting portion <NUM> and is mounted to the mounting portion <NUM>.

When using the cleaning device, the cleaning portion <NUM> can absorb liquids such as water, and complete a cleaning work on a surface to be cleaned by contacting and moving relative to the surface to be cleaned. The cleaning portion <NUM> can be formed of fiber materials such as cotton, linen, wool, etc., and the material forming the cleaning portion <NUM> can be relatively soft in texture and have high water absorption performance, which can further improve the cleaning effect of the cleaning portion <NUM> on the surface to be cleaned.

The mounting portion <NUM> can be a cylindrical structure to provide the mounting base for the cleaning portion <NUM>, and enable the entire rolling brush to have a rolling ability, so that the cleaning work can be performed on different areas of the surface to be cleaned by moving the entire cleaning device. In addition, the cleaning portion <NUM> can also be a cylindrical structure, so as to be sleeved and mounted to the mounting portion <NUM>, and since the material forming the cleaning portion <NUM> usually has a certain elasticity, it can be ensured that the cleaning portion <NUM> can be reliably mounted to the mounting portion <NUM>. In order to ensure high connection reliability between the cleaning portion <NUM> and the mounting portion <NUM>, optionally, the cleaning portion <NUM> may be adhered to a surface of the mounting portion <NUM> through glue.

In order to ensure that the rolling brush can rotate automatically to clean different areas of the surface to be cleaned by moving the entire cleaning device, the driving mechanism <NUM> can be connected to at least one mounting portion <NUM>, so as to drive the rolling brush to rotate under the action of the driving mechanism <NUM>, so that each mounting portion <NUM> is rotatable.

Optionally, the driving mechanism <NUM> may be connected to only one rolling brush to drive the rolling brush to rotate. When one rolling brush actively rotates, the other rolling brushes can also rotate under the driving of the rolling brush, thereby ensuring that the entire cleaning device can move relative to the surface to be cleaned and complete the cleaning work on different areas on the surface to be cleaned.

The driving mechanism <NUM> may be a motor, which may be directly connected to the mounting portion <NUM> to drive the mounting portion <NUM> to rotate. Alternatively, the mounting portion <NUM> may also be indirectly connected to the motor by a transmission mechanism such as a belt, etc., which can ensure that the motor can drive the mounting portion <NUM> to rotate stably to perform cleaning work.

Before or during an operation of the cleaning device, the surface to be cleaned may need to be sprayed with water to improve cleaning results, in order to prevent a large amount of water from remaining on the cleaned surface after wiping, as shown in <FIG> and <FIG>, the cleaning device according to the embodiment of the present invention is provided with the dirty liquid accommodating mechanism <NUM>. The cleaning portion <NUM> of each rolling brush cooperates with the dirty liquid accommodating mechanism <NUM>, so that the liquid such as dirty liquid absorbed by the cleaning portion <NUM> can be collected into the dirty liquid accommodating mechanism <NUM> to minimize the amount of dirty liquid remaining on the cleaned surface after wiping is completed.

The number of the dirty liquid accommodating mechanisms <NUM> can be determined according to actual needs. For example, each rolling brush can be provided with the dirty liquid accommodating mechanism <NUM> respectively, or multiple rolling brushes can share the same dirty liquid accommodating mechanism <NUM>. The dirty liquid accommodating mechanism <NUM> can squeeze out the dirty liquid absorbed in the cleaning portion <NUM> by squeezing with the rolling brush, and store the dirty liquid in its own chamber. When the cleaning work is completed in stages or all the cleaning work is completed, the liquid such as dirty liquid stored in the chamber of the dirty liquid accommodating mechanism <NUM> are poured out. In order to keep the cleaning device clean and prolong the service life of the device, the dirty liquid accommodating mechanism <NUM> and the rest of the cleaning device can be deeply cleaned.

Referring to <FIG>, the dirty liquid accommodating mechanism <NUM> may include a liquid collecting portion <NUM> and a top covering portion <NUM>. The top covering portion <NUM> and the liquid collecting portion <NUM> enclose a liquid collecting cavity <NUM>, and the top covering portion <NUM> is provided with a liquid collecting port <NUM>. In a direction perpendicular to the circumferential direction of the rolling brush, the liquid collecting port <NUM> is located in a middle portion of the top covering portion <NUM>, so that when using the cleaning device, even if the cleaning device is inclined, it can prevent the dirty liquid from splashing out of the liquid collecting cavity <NUM> to a certain extent. It should be noted that the middle portion of the top covering portion <NUM> is a concept relative to the edge of the top covering portion <NUM>. That is, the liquid collecting port <NUM> is not provided on the edge of the top covering portion <NUM>, so as to prevent the dirty liquid in the liquid collecting cavity <NUM> from being easily splashed from the liquid collecting port <NUM> when the cleaning device is inclined. In addition, the direction perpendicular to the circumferential direction of the rolling brush may be the direction A shown in <FIG>.

Specifically, the liquid collecting portion <NUM> and the top covering portion <NUM> can be formed separately, then the top covering portion <NUM> can be detachably connected to the liquid collecting portion <NUM> by a structure such as a buckle, so that in a process of processing dirty liquid, an area of the liquid collecting portion <NUM> in communication with the outside can be increased by removing the top covering portion <NUM>, so that the dirty liquid can be discharged out of the liquid collecting cavity <NUM> more quickly.

Alternatively, as shown in <FIG>, the top covering portion <NUM> can also be movably mounted to the liquid collecting portion <NUM> through elements such as hinges <NUM>. An area of the liquid collecting portion <NUM> in communication with the outside can also be increased by rotating the top covering portion <NUM> to speed up the discharge speed of dirty liquid. In addition, when the above-mentioned connection method is adopted, the top covering portion <NUM> can be prevented from being lost, and a difficulty of disassembling and assembling between the top covering portion <NUM> and the liquid collecting portion <NUM> can be reduced, and the user experience can be improved. In addition, as shown in <FIG>, a pushing button <NUM> may be provided on the top covering portion <NUM>, and a pushing direction may be marked on the top covering portion <NUM>, so as to provide instructions for the user and facilitate the use of the user. Specifically, during the use of the cleaning device, when discharging dirty liquid, the user can push the top covering portion <NUM> to rotate relative to the liquid collecting portion <NUM> according to the indicated direction though the pushing button <NUM>, so as to increase an cross-section area of the liquid collecting cavity <NUM> in communication with the outside. Then the liquid collecting portion <NUM> is tilted to pour out the dirty liquid. After cleaning the liquid collecting portion <NUM>, the top covering portion <NUM> can be reversely rotated though the pushing button <NUM>, so that the top covering portion <NUM> and the liquid collecting portion <NUM> can be fixed as a whole.

Of course, in order to make a fixed connection between the top covering portion <NUM> and the liquid collecting portion <NUM> more stable, elastic buckles can be provided on the top covering portion <NUM> or the liquid collecting portion <NUM>, so as to ensure that when using the cleaning device, the top covering portion <NUM> will not be automatically separated from the liquid collecting portion <NUM>, and the dirty liquid is prevented from splashing out of the liquid collecting cavity <NUM>.

The liquid collecting port <NUM> can be integrally formed with the top covering portion <NUM>, the top covering portion <NUM> can have a substantially rectangular structure as a whole. The liquid collecting port <NUM> can be located in the center of the top covering portion <NUM>, so that after the top covering portion <NUM> and the liquid collecting portion <NUM> are connected to each other to form the liquid collecting cavity <NUM>, even if the dirty liquid accommodating mechanism <NUM> is tilted with the cleaning device, because a distance between the liquid collecting port <NUM> and a supporting surface such as the surface to be cleaned is relatively large, the dirty liquid in the liquid collecting cavity <NUM> is prevented from splashing out as much as possible. Optionally, one or more liquid collecting ports <NUM> may be provided, and each liquid collecting port <NUM> cooperates with the rolling brush to collect liquid such as dirty liquid squeezed out from the rolling brush.

As shown in <FIG>, the top covering portion <NUM> may include a capping wall <NUM>, a blocking wall <NUM> and a liquid guiding wall <NUM>. The capping wall <NUM> is disposed facing a bottom of the liquid collecting portion <NUM>. Optionally, the capping wall <NUM> is parallel to the bottom of the liquid collecting portion <NUM>. The blocking wall <NUM> is connected to an edge of the capping wall <NUM>, and the blocking wall <NUM> extends in a direction adjacent to the bottom of the liquid collecting portion <NUM>. The liquid guiding wall <NUM> is connected to the blocking wall <NUM>, and the liquid guiding wall <NUM> extends obliquely in a direction away from the bottom of the liquid collecting portion <NUM>, which enables the liquid guiding wall <NUM> and the blocking wall <NUM> to form an inclined sink. The inclined sink is recessed relative to the cap wall <NUM>, so that during the operation of the cleaning device, the liquid guiding wall <NUM> can provide a guiding effect for the dirty liquid extruded from the rolling brush. The blocking wall <NUM> can prevent the dirty liquid from continuing to flow. Under the cooperation of the liquid guiding wall <NUM> and the blocking wall <NUM>, the dirty liquid can be collected into the liquid collecting cavity <NUM> from the liquid collecting port <NUM> located at a junction between the liquid guiding wall <NUM> and the blocking wall <NUM>.

Optionally, the liquid collecting portion <NUM> may be a rectangular or approximately rectangular structure, which includes four side portions and a bottom portion. The four side portions may all be connected to the capping wall <NUM>. The capping wall <NUM> is provided with a notch, the blocking wall <NUM> and the liquid guiding wall <NUM> can be arranged at the notch. The liquid guiding wall <NUM> is connected to one side portion of the liquid collecting portion <NUM>, so as to ensure that the top covering portion <NUM> and the liquid collecting portion <NUM> can be connected to each other to form the liquid collecting cavity <NUM>. Of course, the actual structures of the capping wall <NUM>, the blocking wall <NUM>, and the liquid guiding wall <NUM> can be determined according to specific conditions, which are not limited herein. Specifically, the capping wall <NUM>, the blocking wall <NUM>, and the liquid guiding wall <NUM> may be integrally formed, so as to improve the structural stability of the entire top covering portion <NUM>.

Optionally, as shown in <FIG>, the blocking wall <NUM> may extend in a vertical direction. Compared with an inclined arrangement of the blocking wall <NUM>, the vertically extending blocking wall <NUM> can provide a better blocking effect for the dirty liquid, and can also ensure that there is a large space between the blocking wall <NUM> and the liquid guiding wall <NUM>, so that when a flow rate of the dirty liquid is large, it can basically ensure that the dirty liquid can flow into the liquid collecting cavity from the liquid collecting port <NUM> without sputtering.

In order to prevent the liquid collecting port <NUM> from being blocked when an instantaneous flow of dirty liquid is large, the gas remaining in the liquid collecting cavity <NUM> cannot be discharged in time, resulting in frequent bubbling at the liquid collecting port <NUM> and sputtering of the dirty liquid, as shown in <FIG>, at least a part of the liquid collecting port <NUM> can be located on the blocking wall <NUM>, so that during the process that the dirty liquid is squeezed out from the rolling brush and flows to the liquid collecting port <NUM> along the liquid guide wall <NUM>, an interior of the liquid collecting cavity <NUM> can be in communication with the outside of the liquid collecting cavity <NUM> through a part of the liquid collecting port <NUM> located on the blocking wall <NUM>, as the dirty liquid flows into the liquid collecting cavity <NUM>, the gas in the liquid collecting cavity <NUM> can escape from an upper area of the liquid collecting port <NUM>, which can also improve a collection speed of the dirty liquid, and can prevent the dirty liquid from colliding with the blocking wall <NUM> to a large extent to cause sputtering when the dirty liquid flows from the liquid guiding wall <NUM> to the blocking wall <NUM>.

Specifically, a part of the liquid collecting port <NUM> may be located on the blocking wall <NUM>, and another part of the liquid collecting port <NUM> may be located on the liquid guiding wall <NUM>, such that the dirty liquid will be collected to the liquid collecting cavity <NUM> more quickly under the action of gravity.

Further, the blocking wall <NUM> may be a flared structure, and the blocking wall <NUM> may face the rolling brush that is matched with the blocking wall <NUM>. The blocking wall <NUM> includes a first guiding section 273a and a second guiding section 273b, and the liquid collecting port <NUM> is located between the first guiding section 273a and the second guiding section 273b. Optionally, both the first guiding section 273a and the second guiding section 273b can be inclined relative to a moving direction of the rolling brush to achieve diversion effect.

When the blocking wall <NUM> adopts the above-mentioned structure, the blocking wall <NUM> also has a guiding function, so that during a process of the dirty liquid flowing to the blocking wall <NUM> through the guiding of the liquid guiding wall <NUM>, the first guiding section 273a and the second guiding section 273b can provide a blocking effect for the dirty liquid, and can also guide the dirty liquid on both sides of the liquid collecting port <NUM> to flow to the liquid collecting port <NUM> to further increase the speed of collecting the dirty liquid.

In the direction perpendicular to the circumferential direction of the rolling brush, a size of a side of the liquid guiding wall <NUM> away from the blocking wall <NUM> can be similar to a length of the rolling brush, so as to ensure that the dirty liquid at any position on the rolling brush can flow from the liquid guide wall <NUM> to the liquid collecting port <NUM>. The first guiding section 273a and the second guiding section 273b can be substantially symmetrically arranged, so as to ensure that the dirty liquid extruded from different positions on the rolling brush can flow into the liquid collecting cavity <NUM> from the liquid collecting port <NUM> evenly.

Optionally, as shown in <FIG>, the dirty liquid accommodating mechanism <NUM> may further include an upper cover <NUM>, the upper cover <NUM> coveres a side of the top covering portion <NUM> away from the liquid collecting portion <NUM>, so as to prevent the liquid contained in the liquid collecting cavity <NUM> from splashing out from the liquid collecting port <NUM> by the upper cover <NUM>. Furthermore, the upper cover <NUM> can also cover the liquid collecting cavity <NUM> containing the liquid such as dirty liquid, so as to improve the overall appearance of the entire cleaning device when the entire cleaning device is used, thereby further improving the user experience of the product. Specifically, the upper cover <NUM> may be connected to the liquid collecting portion <NUM> or the top covering portion <NUM>, and of course, the upper cover <NUM> may also be directly connected to the housing <NUM>.

More specifically, as shown in <FIG>, in the case where the dirty liquid accommodating mechanism <NUM> is located between the front rolling brush <NUM> and the rear rolling brush <NUM>, the upper cover <NUM> can be extended to the front rolling brush <NUM> and the rear rolling brush <NUM> at the same time, so that the upper cover <NUM> can also cover a part of the front rolling brush <NUM> and a part of the rear rolling brush <NUM>, so as to shield the front rolling brush <NUM> and the rear rolling brush <NUM>, which prevents the liquid adsorbed on the front rolling brush <NUM> and the rear rolling brush <NUM> from splashing when the front rolling brush <NUM> and the rear rolling brush <NUM> rotate.

In order to further prevent the liquid collected in the liquid collecting cavity <NUM> from splashing out from the liquid collecting port <NUM> when the entire cleaning device moves, preferably, as shown in <FIG>, the cleaning device may further include a splash-proof flange <NUM>. The splash-proof flange <NUM> is connected to a side of the upper cover <NUM> facing the liquid collecting portion <NUM>. As shown in <FIG>, the splash-proof flange <NUM> is provided facing the liquid collecting port <NUM>, the splash-proof flange <NUM> and the blocking wall <NUM> of the top covering portion <NUM> are attached to each other. Furthermore, during the operation of the cleaning device, the liquid collecting port <NUM> can be shielded to a certain extent by the splash-proof flange <NUM>, which can substantially prevent the liquid such as dirty liquid contained in the liquid collecting cavity <NUM> from flowing out or splashing out when the cleaning device moves, so as to ensure that the cleaned surface will not be re-contaminated. In addition, a contact area between the splash-proof flange <NUM> and the top covering portion <NUM> is relatively large, the upper cover <NUM> is sustainably not separated from the top covering portion <NUM> during the operation of the cleaning device, thereby further preventing the dirty liquid from splashing out of the liquid collecting port <NUM>.

Specifically, the splash-proof flange <NUM> may be fixed to a surface of the side of the upper cover <NUM> by bonding or thermal fusion, or the splash-proof flange <NUM> and the upper cover <NUM> can be integrally formed. A size of the splash-proof flange <NUM> can be adjust according to the actual situation, and, in the case where the splash-proof flange <NUM> and the liquid collecting port <NUM> cooperate with each other, it is necessary to ensure that the liquid collecting port <NUM> is in communication with the outside of the liquid collecting cavity <NUM>, so that the liquid squeezed out from the front rolling brush <NUM> and the rear rolling brush <NUM> is collected. In addition, in the case where a plurality of liquid collecting ports <NUM> are provided, the splash-proof flanges <NUM> may be provided corresponding to the liquid collecting ports <NUM>, so as to prevent the liquid such as dirty liquid from splashing out from the liquid collecting ports <NUM>.

Optionally, the outer circumference of the liquid collecting portion <NUM> may be a square structure, which enables the liquid collecting portion <NUM> to better cooperate with the front rolling brush <NUM>, the rear rolling brush <NUM> and an ending cover <NUM> in the housing <NUM>, and the shape of the cleaning device is substantially square, and the cleaning device of this structure has a relatively good cleaning effect on areas such as corners of the house, moreover, the cleaning device of this structure has a relatively high aesthetics, which can improve the competitiveness of the product. Considering that during the cleaning process, a single adsorption may not be able to completely absorb the clean water or dirty liquid attached to the cleaned surface, therefore, as shown in <FIG> and <FIG>, the plurality of rolling brushes of the cleaning device include the front rolling brush <NUM> and the rear rolling brush <NUM>. In the moving direction of the rolling brush, the front rolling brush <NUM> is located in front of the rear rolling brush <NUM>, meanwhile, at least a part of a projection of the front rolling brush <NUM> is located within a projection of the rear rolling brush <NUM>, so that a movement track of the rear rolling brush <NUM> can cover at least a part of the movement track of the front rolling brush <NUM>, such that the cleaned surface adsorbed by the front rolling brush <NUM> can be adsorbed and cleaned again by the rear rolling brush <NUM>, so as to further reduce the amount of water remaining on the cleaned surface, and even enable the cleaned surface wiped by the rear rolling brush <NUM> is almost free of water.

In addition, when the front rolling brush <NUM> and the rear rolling brush <NUM> are provided, the front rolling brush <NUM> can perform preliminary cleaning of the surface to be cleaned. While cleaning most of the stains on the surface to be cleaned, most of the dirty liquid can also be adsorbed and collected into the cleaning portion <NUM>, and the rear rolling brush <NUM> can perform secondary cleaning on the cleaned surface cleaned by the front rolling brush <NUM>, which enable the cleaning device to have a better cleaning effect on the surface to be cleaned. In addition, the rear rolling brush <NUM> can also adsorb the remaining dirty liquid on the surface to be cleaned for a second time, so as to further reduce the amount of dirty liquid remaining on the surface to be cleaned, and even in some cases, there can be substantially no dirty liquid on the surface to be cleaned. On the one hand, it can prevent the stains from being adhered to the wet cleaned surface again when the user steps on the cleaned surface that has just been wiped and cleaned, on the other hand, the wetness of the cleaned surface can be reduced, reducing or even eliminating a risk of slipping when the user walks on the cleaned surface that has just been wiped.

Further, as shown in <FIG> and <FIG>, the mounting portion <NUM> may be provided with an inner cavity <NUM>, and in a process of assembling the cleaning device, the driving mechanism <NUM> is mounted in the inner cavity <NUM>, so that the mounting portion <NUM> can provide a certain protective effect for the driving mechanism <NUM>. Meanwhile, by placing the driving mechanism <NUM> in the mounting portion <NUM>, a security threat caused by the driving mechanism <NUM> that rotates at high speed when the cleaning device is used for cleaning work can be reduced.

Optionally, as shown in <FIG>, the driving mechanism <NUM> may include a motor <NUM>, a driving button <NUM>, and a bearing <NUM>. The driving button <NUM> may be fixed to a middle portion of the mounting portion <NUM> in an axial direction thereof. In this way, the motor <NUM> drives the middle of the mounting portion <NUM> to rotate the entire rolling brush, so that a force of the motor <NUM> acting on the mounting portion <NUM> can be relatively balanced, and the mounting portion <NUM> can rotate more stably. In addition, with the above structure, a proportion of the cleaning portion <NUM> in the entire cleaning device can be increased to a certain extent along a width direction of the cleaning device, so that when the cleaning device is fixed, a cleaning efficiency of the cleaning device can be improved.

Specifically, the motor <NUM> includes a casing <NUM> and a driving shaft <NUM>. When the motor <NUM> works, the driving shaft <NUM> rotates relative to the casing <NUM>. The casing <NUM> can be fixed to the housing <NUM> of the cleaning device, and the casing <NUM> can also be connected to the mounting portion <NUM> through the bearing <NUM>. Specifically, the casing <NUM> can extend through an inner ring of the bearing <NUM>, and an outer ring of the bearing <NUM> is fixed to an inner surface of the mounting portion <NUM>, so as to ensure that the mounting portion <NUM> has an ability to rotate relative to the casing <NUM>. The driving shaft <NUM> can be fixed to the driving button <NUM>, so that when the driving shaft <NUM> rotates, the mounting portion <NUM> fixed to the driving button <NUM> can be driven to rotate, so as to achieve a purpose of driving the rolling brush to rotate. In addition, since the casing <NUM> is connected to the mounting portion <NUM> through the bearing <NUM>, and the casing <NUM> is fixed to the housing <NUM>, even if the mounting portion <NUM> rotates, the casing <NUM> and the housing <NUM> can be kept relatively still.

More specifically, as shown in <FIG>, the housing <NUM> may include a main body <NUM> and the ending cover <NUM>. The ending covers <NUM> are provided on opposite sides of the main body <NUM>, and the ending covers <NUM> are connected to the main body <NUM>. Both the rolling brush and the driving mechanism <NUM> may be provided between the two ending covers <NUM>. As shown in <FIG>, the casing <NUM> can be fixed to the ending cover <NUM>, and the driving shaft <NUM> can extend into the inner cavity <NUM> of the mounting portion <NUM> to be fixed to the driving button <NUM>. The driving button <NUM> and the mounting portion <NUM> may be integrally formed, so as to improve a reliability of a connection between the driving button <NUM> and the mounting portion <NUM>.

In order to ensure higher stability of a rotating action of the mounting portion <NUM>, preferably, as shown in <FIG>, two bearings <NUM> may be provided, and the two bearings <NUM> may be respectively disposed on opposite sides of the driving button <NUM> to provide stability for a rotation process of the mounting portion <NUM>. Specifically, as shown in <FIG>, another bearing <NUM> may be connected to a side of the driving button <NUM> away from the motor <NUM>, the outer ring of the bearing <NUM> may be fixed to the inner surface of the mounting portion <NUM>, and the inner ring of the bearing <NUM> may be fixed to the ending cover <NUM> to ensure that the mounting portion <NUM> can rotate relative to the ending cover <NUM>, the reliability of the entire rolling brush during rotation is further improved.

Alternatively, the driving mechanism <NUM> may also have other structures, and the purpose of driving the mounting portion <NUM> can be achieved through other connection methods. Optionally, the driving mechanism <NUM> may include a stator and a rotor, the stator of the motor <NUM> may be connected to the housing <NUM> of the cleaning device, and the rotor may be connected to the mounting portion <NUM>. In this way, the driving mechanism <NUM> can also achieve the purpose of driving the mounting portion <NUM> to rotate. Specifically, the stator may be fixed to the ending cover <NUM> of the housing <NUM>, and the rotor may be connected to the mounting portion <NUM>. An assembly method of the driving mechanism <NUM> is relatively simple, and spare elements and installation costs are relatively low.

Further, a plurality of driving mechanisms <NUM> may be provided, and the plurality of driving mechanisms <NUM> may be connected to the plurality of rolling brushes in one-to-one correspondence. In this way, each rolling brush can have the ability to operate autonomously, so that under a power provided by the driving mechanism <NUM>, an interaction force between each rolling brush and the surface to be cleaned becomes larger, so as to further improve the cleaning effect of the entire cleaning device. At the same time, under the action of the plurality of the driving mechanisms <NUM>, a normal operation of the entire cleaning device can be prevented from being affected by a failure of a single driving mechanism <NUM>.

Specifically, the structures of each driving mechanism <NUM> may be completely the same, and the driving mechanisms <NUM> are connected to the mounting portion <NUM> in the same or similar mounting manner. Alternatively, the structures of the plurality of driving mechanisms <NUM> may also be different from each other, and connection manners between different driving mechanisms <NUM> and different mounting portions <NUM> may also be different from each other. For a sake of brevity, the description will not be repeated herein. Those skilled in the art can determine the connection manners between the driving mechanism <NUM> with different structures and the mounting portion <NUM> according to the aforementioned embodiments.

More specifically, each of the plurality of rolling brushes may be provided with the inner cavity <NUM>, and then the plurality of driving mechanisms <NUM> may be respectively mounted in the inner cavities <NUM> of the plurality of rolling brushes, so that the driving mechanism of the entire cleaning device is not exposed to the outside, so as to further improve a safety performance of the entire cleaning device.

Considering that during the cleaning process, the area contacted by the rear rolling brush <NUM> is the area that has been cleaned by the front rolling brush <NUM>, therefore, compared with the rear rolling brush <NUM>, the area contacted by the front rolling brush <NUM> is dirtier. In order to further improve the cleaning effect of the entire cleaning device, a linear velocity of the front rolling brush <NUM> can be set to be larger than a linear velocity of the rear rolling brush <NUM>, which enables a relative movement speed between the front rolling brush <NUM> and the surface to be cleaned larger, so that the stains attached to the surface to be cleaned can be removed more easily and thoroughly. Specifically, when only one driving mechanism <NUM> is provided, the driving mechanism <NUM> can be directly connected to the front rolling brush <NUM>, the front rolling brush <NUM> is driven to rotate by the driving mechanism <NUM>, and the rear rolling brush <NUM> is driven by the front rolling brush <NUM> to rotate. Since the rear rolling brush <NUM> needs to overcome a resistance to rotate, the linear velocity of the front rolling brush <NUM> can be ensured to be greater than the linear velocity of the rear rolling brush <NUM>. When the front rolling brush <NUM> and the rear rolling brush <NUM> are both equipped with the driving mechanism <NUM>, and the structure and size of the front rolling brush <NUM> and the rear rolling brush <NUM> are the same, it can be ensured that the linear velocity of the front rolling brush <NUM> is greater than the linear velocity of the rear rolling brush <NUM> by the rotational speed of the driving mechanism <NUM> matched with the front rolling brush <NUM> being greater than the rotational speed of the driving mechanism <NUM> connected to the rear rolling brush <NUM>. For another example, when a rotational speed of each driving mechanism <NUM> is the same, a circumference of the rear rolling brush <NUM> may be greater than a circumference of the front rolling brush <NUM>. Of course, by combining the above-mentioned methods, the linear velocity of the front rolling brush <NUM> can also be larger than the linear velocity of the rear rolling brush <NUM>.

Alternatively, in some cases, the linear velocity of the rear rolling brush <NUM> may be greater than the linear velocity of the front rolling brush <NUM>. In this way, the relative movement speed between the rear rolling brush <NUM> and the surface to be cleaned is relatively large, so that the dirty liquid on the surface to be cleaned wiped by the front rolling brush <NUM> can be absorbed faster and more thoroughly when the rear rolling brush <NUM> rotates multiple times, thereby further reducing a slippery degree of the cleaned surface wiped by the cleaning device, and it can also achieve a certain polishing effect on the cleaned surface and improve a smoothness of the cleaned surface.

Specifically, the control method of the linear velocity of the rear rolling brush <NUM> to be greater than the linear velocity of the front rolling brush <NUM> may be similar to that in the aforementioned embodiments. For a sake of brevity, it will not be repeated herein.

In addition, the cleaning device may also be provided with a control mechanism, and the control mechanism may be connected to each driving mechanism <NUM>, so that the user can control the linear velocities of the front rolling brush <NUM> and the rear rolling brush <NUM> under different conditions, respectively.

In order to further improve the processing and assembly efficiency of the entire cleaning device and reduce the cost, preferably, as shown in <FIG>, two rolling brushes are provided, which are the front rolling brush <NUM> and the rear rolling brush <NUM>, respectively. The front rolling brush <NUM> mainly plays a role of cleaning and adsorbing dirty liquid, and the rear rolling brush <NUM> mainly plays a role of secondary cleaning and drying the surface to be cleaned. In order to enable the cleaned surface wiped by the front rolling brush <NUM> to be completely wiped again by the rear rolling brush <NUM>, preferably, in the moving direction of the rolling brush, the projection of the front rolling brush <NUM> and the projection of the rear rolling brush <NUM> can be coincided. Since rotation directions of the front rolling brush <NUM> and the rear rolling brush <NUM> are the same, in this way, it can be ensured that the cleaned surface wiped by the front rolling brush <NUM> can be wiped again by the rear rolling brush <NUM>, so that a high cleaning effect on everywhere on the surface to be cleaned can be obtained, and the wetness on the cleaned surface is low.

Specifically, the structure and size of the front rolling brush <NUM> and the rear rolling brush <NUM> can be the same, and ends of the front rolling brush <NUM> and the rear rolling brush <NUM> can be aligned in the moving direction. When the rotation directions of the front rolling brush <NUM> and the rear rolling brush <NUM> are the same, it can basically ensure that the rear rolling brush <NUM> can completely move along the movement track of the front rolling brush <NUM>, so as to perform secondary wiping on the cleaned surface wiped by the front rolling brush <NUM>. It should be noted that, in order to improve the cleaning effect, the cleaning portion <NUM> can be made of a soft fiber material. When the cleaning portion <NUM> of the front rolling brush <NUM> or the rear rolling brush <NUM> is curly, etc., the projections of the front rolling brush <NUM> and the rear rolling brush <NUM> in the moving direction will be slightly misaligned, which also falls within the protection scope of the embodiments of the present invention.

In addition, the structure and size of the front rolling brush <NUM> and the rear rolling brush <NUM> are the same, which is convenient to prepare the spare elements. Meanwhile, when the cleaning portion <NUM> of the front rolling brush <NUM> and/or the rear rolling brush <NUM> is dirty or damaged, the cleaning portion <NUM> of the same structure can be replaced with the mounting portion <NUM> of the front rolling brush <NUM> and/or the rear rolling brush <NUM>, which reduces a maintenance cost of the entire cleaning device and improves a usability of the entire cleaning device.

In addition, when the structure and size of the front rolling brush <NUM> and the rear rolling brush <NUM> are the same, a center of gravity of the entire cleaning device is relatively centered, so that it will not occur that an interaction force between one of the two rolling brushes and the surface to be cleaned is much smaller than an interaction force between the other rolling brush and the surface to be cleaned duo to the size of one of the two rolling brushes being larger than that of the other rolling brush, reducing the cleaning or drying effect of the cleaned surface. When the structure and size of the front rolling brush <NUM> and the rear rolling brush <NUM> are the same, since load-bearings of the two rolling brush are relatively balanced, it is ensured that the interaction forces between the front rolling brush <NUM> and the rear rolling brush <NUM> and the surface to be cleaned are basically the same, which can improve the cleaning and drying effect of the entire cleaning device on the surface to be cleaned to a certain extent.

In order to further reduce the number of elements in the cleaning device, so as to reduce the overall size of the cleaning device, make the cleaning device to be more convenient to use, and enable the cleaning device to enter relatively small gaps for cleaning work, optionally, as shown in <FIG>, only one dirty liquid accommodating mechanism <NUM> is provided. In order to ensure that the dirty liquid absorbed by the front rolling brush <NUM> and the rear rolling brush <NUM> can be collected into the dirty liquid accommodating mechanism <NUM>, so as to improve the drying of the cleaned surface, preferably, in the process of designing and assembling the front rolling brush <NUM> and the rear rolling brush <NUM>, a preset interval is provided between the front rolling brush <NUM> and the rear rolling brush <NUM>, so that the dirty liquid accommodating mechanism <NUM> can be mounted between the front rolling brush <NUM> and the rear rolling brush <NUM>. It can ensure that both the front rolling brush <NUM> and the rear rolling brush <NUM> can cooperate with the dirty liquid accommodating mechanism <NUM> to squeeze and discharge the liquid such as dirty liquid into the dirty liquid accommodating mechanism <NUM>, which prevents the front rolling brush <NUM> and the rear rolling brush <NUM> from already adsorbing more liquid before contacting the surface to be cleaned, and improves the dryness of the surface to be cleaned after being wiped.

Based on the above embodiment, as shown in <FIG>, two liquid collecting ports <NUM> may be provided. One liquid collecting port <NUM> may be provided facing the front rolling brush <NUM>, while the other liquid collecting port <NUM> may be provided facing the rear rolling brush <NUM>, so as to ensure that liquids such as water adsorbed by the front rolling brush <NUM> and the rear rolling brush <NUM> can be collected into the liquid collecting cavity <NUM>. When two liquid collecting ports <NUM> are provided, the two liquid collecting ports <NUM> can both be located in the middle of the top covering portion <NUM>. Further, the two liquid collecting ports <NUM> can be provided opposite to each other on the capping wall <NUM> to ensure that distances between the plurality of liquid collecting ports <NUM> and the surface to be cleaned are relatively large.

In order to further improve the cleaning effect, preferably, as shown in <FIG>, the cleaning device may further include a handle <NUM>. The handle <NUM> is mounted in the housing <NUM>. When the cleaning device is provided with the handle <NUM>, the user can apply a preset force to the housing <NUM> through the handle <NUM> during the process of using the cleaning device to clean the surface to be cleaned. Since both the front rolling brush <NUM> and the rear rolling brush <NUM> are connected to the housing <NUM>, the interaction force between the front rolling brush <NUM> and the rear rolling brush <NUM> and the surface to be cleaned can be increased to a certain extent, which can further increase the cleaning effect and drying effect of the cleaning device on the surface to be cleaned.

In addition, when the handle <NUM> is provided, it is also convenient for the user to operate the entire cleaning device, so as to perform multiple cleanings on the area on the surface to be cleaned with more stains or stubborn stains, and the entire cleaning device can also be operated to perform more precise cleaning work in corners or crevices, which can further improve a usability of the cleaning device and enhance the user experience.

Specifically, the length and shape of the handle <NUM> can be determined according to actual requirements. Preferably, the handle <NUM> can be a cylindrical rod-shaped structure, and the handle <NUM> of this structure is convenient for the user to grasp. The handle <NUM> may form a reliable connection relationship with the housing <NUM> though a hinge. In order to further improve the usability of the entire cleaning device, preferably, a reliable connection relationship can be formed between the handle <NUM> and the housing <NUM> through a universal joint <NUM>, which can further improve the convenience of use of the cleaning device.

In order to further improve the usability and using range of cleaning device, preferably, as shown in <FIG>, an avoidance notch <NUM> may be formed on the liquid collecting portion <NUM>. During the mounting process of the handle <NUM>, a part of the handle <NUM> is located at the avoidance notch <NUM>, so that when the handle is connected to the housing <NUM> through the universal joint <NUM>, the handle <NUM> can be inclined at a larger angle relative to the housing. The handle <NUM> can even be parallel to the surface, so that the places such as under the bed, under the table, etc., can be cleaned.

When the liquid collecting portion <NUM> is provided with the avoidance notch <NUM>, as shown in <FIG>, the liquid collecting portion <NUM> includes a first liquid collecting area <NUM> and a second liquid collecting area <NUM>. The first liquid collecting area <NUM> and the second liquid collecting area <NUM> are located on opposite sides of the avoidance notch <NUM>, respectively, which enables the avoidance notch <NUM> between the front rolling brush <NUM> and the rear rolling brush <NUM> more centered relative to the housing <NUM>, so as to further improve the convenience of operation of the handle <NUM> mounted at the avoidance notch <NUM>. At the same time, both the first liquid collecting area <NUM> and the second liquid collecting area <NUM> can cooperate with the front rolling brush <NUM> and the rear rolling brush <NUM>. In this way, the entire liquid collecting portion <NUM> can better collect liquid such as dirty liquid squeezed out from the front rolling brush <NUM> and the rear rolling brush <NUM>.

Specifically, the liquid collecting portion <NUM> may be formed of plastic and other materials by integral molding. By connecting the first liquid collecting area <NUM> and the second liquid collecting area <NUM> to each other, the process of disassembling and assembling the liquid collecting portion <NUM> is more convenient. Volumes of the first liquid collecting area <NUM> and the second liquid collecting area <NUM> can be determined according to the actual situation. Preferably, the volumes of the first liquid collecting area <NUM> and the second liquid collecting area <NUM> can be the same, and the sizes of the portions thereof matching with the front rolling brush <NUM> and the rear rolling brush <NUM> can be substantially the same, so that the amount of dirty liquid collected by the first liquid collecting area <NUM> and the second liquid collecting area <NUM> is the same or similar. During the operation of the cleaning device, a situation in which one of the first liquid collecting area <NUM> and the second liquid collecting area <NUM> has been filled or even overflowed, while the other has not been filled, is prevented.

In addition, when the liquid collecting portion <NUM> includes the first liquid collecting area <NUM> and the second liquid collecting area <NUM>, two top covering portions <NUM> may be provided, and each top covering portion <NUM> may be provided with at least two liquid collecting ports <NUM>. Taking the top covering portion <NUM> matched with the first liquid collecting area <NUM> as an example, in the two liquid collecting ports <NUM>, one is provided facing the front rolling brush <NUM>, the other is provided facing the rear rolling brush <NUM>, so as to ensure that the liquid squeezed by the front rolling brush <NUM> and the rear rolling brushes <NUM> can be collected into the first liquid collecting area <NUM> through the corresponding liquid collecting ports <NUM>. Correspondingly, the top covering portion <NUM> corresponding to the second liquid collecting area <NUM> may also be provided with at least two liquid collecting ports <NUM>, which are respectively provided facing the front rolling brush <NUM> and the rear rolling brush <NUM>. Similarly, the liquid collecting ports <NUM> on each top covering portion <NUM> are all provided in the middle of the top covering portion <NUM>.

In addition, as shown in <FIG>, two pushing buttons <NUM> may be provided, and the two pushing buttons <NUM> may be respectively provided on the top covering portions <NUM> corresponding to the first liquid collecting area <NUM> and the second liquid collecting area <NUM> to improve the convenience of disassembling each top covering portion <NUM>.

In order to enable the amount of dirty liquid collected by the first liquid collecting area <NUM> and the second liquid collecting area <NUM> to be more balanced, preferably, the first liquid collecting area <NUM> and the second liquid collecting area <NUM> can be in communication with each other. In this way, even if more the liquid such as dirty liquid flow into the first collecting area <NUM> at the same time, since the first liquid collecting area <NUM> and the second liquid collecting area <NUM> are in communication with each other, there is no large difference in the amount of the liquid remaining in the first liquid collecting area <NUM> and the second liquid collecting area <NUM>.

Specifically, in a direction of gravity, bottoms of the first liquid collecting area <NUM> and the second liquid collecting area <NUM> may be in communication with each other, or the first liquid collecting area <NUM> and the second liquid collecting area <NUM> may have bottom-up communication structure, so as to increase a flow rate of the dirty liquid between the first liquid collecting area <NUM> and the second liquid collecting area <NUM>. Optionally, a cavity may be formed in the structure in which the first liquid collecting area <NUM> and the second liquid collecting area <NUM> are connected to each other to communicate the first liquid collecting area <NUM> and the second liquid collecting area <NUM> through the cavity, which further reduce a number of the structure connected between the first liquid collecting area <NUM> and the second liquid collecting area <NUM>.

When the first liquid collecting area <NUM> and the second liquid collecting area <NUM> are in communication with each other, the first liquid collecting area <NUM> and the second liquid collecting area <NUM> are both provided with a top covering portion <NUM>, and any second flow guiding section 273b is located between the first guiding section 273a and the avoidance notch <NUM>. Optionally, in a direction perpendicular to the circumferential direction of the rolling brush, a size of the second guiding section 273b is less than that of the first guiding section 273a.

With the above structure, when the cleaning device is inclined, the dirty liquid contained in the first liquid collecting area <NUM> and the second liquid collecting area <NUM> will first flow to the lower one. For example, in the direction of gravity, the first liquid collecting area <NUM> is lower than the second liquid collecting area <NUM>, the dirty liquid in the second liquid collecting area <NUM> will first gather in the first liquid collecting area <NUM>, the amount of the dirty liquid in the first liquid collecting area <NUM> is greater than the amount of dirty liquid in the second liquid collecting area <NUM>. In this way, as shown in <FIG>, the amount of dirty liquid that can be retained in the first liquid collecting area <NUM> is related to the size of the first guiding section 273a in the direction A, the amount of dirty liquid that can be retained in the second liquid collecting area <NUM> is related to the size of the second guiding section 273b in the direction A. Compared with the situation that the size of the first guiding section 273a is less than or equal to the size of the second guiding section 273b, since the size of the first guiding section 273a is greater than the size of the second guiding section 273b, the amount of dirty liquid remaining in the first liquid collecting area <NUM> and the second liquid collecting area <NUM> can be relatively large, thereby preventing the dirty liquid from splashing out when the cleaning device is inclined.

In addition, the volume of the liquid collecting cavity <NUM> can also be enlarged by protruding the top covering portion <NUM> in a direction away from the liquid collecting portion <NUM>, which can also solve the problem of splashing dirty liquid when the cleaning device is inclined to a certain extent. Specifically, the distance between the capping wall <NUM> and the bottom of the liquid collecting portion <NUM> can be increased, so that the volume of the liquid collecting cavity <NUM> can be increased.

During the operation of the cleaning device, since the front rolling brush <NUM> adsorbs the dirty liquid on the cleaned surface prior to the rear rolling brush <NUM>, at the same time point, the amount of dirty liquid adsorbed by the front rolling brush <NUM> is usually larger than that of the rear rolling brush <NUM>. Then under the action of a front liquid scraping strip and a rear liquid scraping strip, the amount of dirty liquid squeezed out from the front rolling brush <NUM> is greater than the amount of dirty liquid squeezed out from the rear rolling brush <NUM>. In order to enable the dirty liquid squeezed out from the front rolling brush <NUM> can be better collected into the liquid collecting portion <NUM>, preferably, as shown in <FIG>, the avoidance notch <NUM> may be provided on a side of the liquid collecting portion <NUM> adjacent to the rear rolling brush <NUM>.

In this way, since a side of the liquid collecting portion <NUM> adjacent to the front rolling brush <NUM> is not provided with the avoidance notch <NUM>, the dirty liquid squeezed out from the front rolling brush <NUM> can enter the first liquid collecting area <NUM> and the second liquid collecting area <NUM> through a side with a relatively large cross-sectional area, so as to ensure that a large amount of dirty liquid squeezed out from the front rolling brush <NUM> can be quickly collected into the liquid collecting section <NUM>. At the same time, since the amount of dirty liquid absorbed by the rear rolling brush <NUM> is relatively small, although the avoidance notch <NUM> occupies a part of the liquid collecting portion <NUM>, it will not have a great adverse effect on the dirty liquid squeezed out from the rear rolling brush <NUM> flowing into the first liquid collecting area <NUM> and the second liquid collecting area <NUM>. Therefore, the liquid collecting portion <NUM> of this structure can ensure that the dirty liquid squeezed out from the front rolling brush <NUM> and the rear rolling brush <NUM> can be collected quickly and thoroughly.

As aforementioned, both the front rolling brush <NUM> and the rear rolling brush <NUM> and the dirty liquid accommodating mechanism <NUM> can be squeezed against each other, such that the liquid such as dirty liquid adsorbed by the front rolling brush <NUM> and the rear rolling brush <NUM> is collected into the dirty liquid accommodating mechanism <NUM>. Of course, other methods may also be used to collect the liquid adsorbed by the front rolling brush <NUM> and the rear rolling brush <NUM>, such as vacuum suction, etc. For a sake of brevity, it will not be listed herein.

Further, the dirty liquid accommodating mechanism <NUM> may further include a liquid scraping strip, and at least one of the front rolling brush <NUM> and the rear rolling brush <NUM> may be provided with the liquid scraping strip, so that the speed and thoroughness of the dirty liquid from the rolling brush can be further improved by the liquid scraping strip.

Optionally, as shown in <FIG>, a front liquid scraping strip <NUM> may be provided for the front rolling brush <NUM>, and the front liquid scraping strip <NUM> is squeezed with the front rolling brush <NUM>, such that the thoroughness of the liquid being squeezed out from the front rolling brush <NUM> can be improved, and the front rolling brush <NUM> can absorb more dirty liquid in the subsequent wiping and cleaning process. In addition, as the front rolling brush <NUM> rotates, liquid such as dirty liquid on the front rolling brush <NUM> can be squeezed out into the liquid collecting portion <NUM> immediately, which can prevent the surface to be cleaned that has been wiped by the front rolling brush <NUM> from being too slippery.

When the front rolling brush <NUM> is rotated counterclockwise to enable the cleaning device to have a tendency to move forward, the front liquid scraping strip <NUM> may be provided on a side of the front rolling brush <NUM> adjacent to the liquid collecting portion <NUM>. Specifically, the front liquid scraping strip <NUM> can extend along most of the front rolling brush <NUM>, and part of the front liquid scraping strip <NUM> is squeezed with the front rolling brush <NUM>, so that after the front rolling brush <NUM> absorbs the liquid, as the front rolling brush <NUM> rotates, the front liquid scraping strip <NUM> squeezes the front rolling brush <NUM> to squeeze out the liquid absorbed by the front rolling brush <NUM>. Moreover, the liquid squeezed out from the front rolling brush <NUM> can flow on the surface of the front rolling brush <NUM>, and finally flows into the liquid collecting cavity <NUM> through the liquid collecting port <NUM>. Optionally, the front liquid scraping strip <NUM> may be connected to the upper cover <NUM> through a connecting structure, or the front liquid scraping strip <NUM> and the upper cover <NUM> may be integrally formed.

Further, the liquid collecting portion <NUM> can be arranged as close to the front liquid scraping strip <NUM> as possible, so that the liquid squeezed out by the front liquid scraping strip <NUM> can flow into the liquid collecting portion <NUM> more quickly and thoroughly, thus preventing liquid such as dirty liquid from sputtering, or flowing out of the cleaning device, or flowing to the surface to be cleaned, after escaping from the front rolling brush <NUM>, which affects the cleaning effect of the surface to be cleaned.

Further, the liquid collecting portion <NUM> for collecting dirty liquid can be detachably connected to the housing <NUM>. In this way, when the dirty liquid in the liquid collecting cavity <NUM> is poured out, the liquid collecting portion <NUM> only needs to be removed from the housing <NUM>, the liquid collecting portion <NUM> is cleaned separately, which further improves the convenience of use of the cleaning device. In order to facilitate the removal of the liquid collecting portion <NUM> from the housing <NUM>, preferably, as shown in <FIG>, a handing element <NUM> may be provided on the liquid collecting portion <NUM>, a difficulty of removing the liquid collecting portion <NUM> can be reduced by the handing element <NUM>.

Optionally, as shown in <FIG>, the dirty liquid accommodating mechanism <NUM> may further include a liquid guiding portion <NUM>. The liquid guiding portion <NUM> may be connected to the liquid collecting portion <NUM>, and the front liquid scraping strip <NUM> may be provided with the liquid guiding portion <NUM>. In a process of squeeze between the front liquid scraping strip <NUM> and the front rolling brush <NUM>, the liquid guiding portion <NUM> can be configured to provide guidance for the squeezed the liquid such as dirty liquid, which allows the dirty liquid to flow into the liquid collecting cavity <NUM> more quickly and directly through the liquid collecting port <NUM>. At the same time, in a process from when the liquid such as dirty liquid is squeezed out to flow into the liquid collecting cavity <NUM>, the liquid guiding portion <NUM> can also prevent the liquid such as dirty liquid from being absorbed into the front rolling brush <NUM> again, which enables the dirty liquid in the front rolling brush <NUM> to be squeezed out more thoroughly, so as to further improve the cleaning and drying degree of the cleaned surface after wiping.

Optionally, a side wall of the liquid collecting portion <NUM> may extend obliquely to form the liquid guiding portion <NUM>, so as to reduce the difficulty of forming and mounting the liquid guiding portion <NUM>. In addition, the liquid guiding portion <NUM> cooperates with an upper portion of the front rolling brush <NUM> adjacent to the liquid collecting portion <NUM> in the direction of gravity, so that the liquid guiding portion <NUM> can not only provide a guiding function, but also can be squeezed with the front rolling brush <NUM> to further squeeze out the dirty liquid adsorbed in the front rolling brush <NUM>.

Further, after working for a period of time, the amount of liquid such as dirty liquid adsorbed in the rear rolling brush <NUM> may also be relatively large, the dirty liquid in the rear rolling brush <NUM> may be difficult to squeeze out only by the way that it squeezes with the side wall of the liquid collecting portion <NUM>. In order to ensure that the dirty liquid adsorbed by the rear rolling brush <NUM> can be quickly and thoroughly collected into the liquid collecting cavity <NUM>, in the case that both the front rolling brush <NUM> and the rear rolling brush <NUM> are provided with the driving mechanism <NUM>, the front rolling brush <NUM> can be rotated counterclockwise, and the rear rolling brush <NUM> can be rotated clockwise, so that both the front rolling brush <NUM> and the rear rolling brush <NUM> are provided with liquid scraping strips.

Specifically, as similar to the front liquid scraping strip <NUM>, a position of the rear liquid scraping strip <NUM> corresponds to a position of the front liquid scraping strip <NUM>, that is, the rear liquid scraping strip <NUM> may be provided on the rear rolling brush <NUM> adjacent to the liquid collecting portion <NUM>, and the rear liquid scraping strip <NUM> can extend along most of the rear rolling brush <NUM>. Part of the rear liquid scraping strip <NUM> can be squeezed with the rear rolling brush <NUM>, so that the rear liquid scraping strip <NUM> can be squeezed with the rear rolling brush <NUM> mutually when the rear rolling brush <NUM> rotates clockwise after absorbing the liquid, so that the liquid absorbed by the rear rolling brush <NUM> is squeezed out. The liquid squeezed out from the rear rolling brush <NUM> can be attached to the rear rolling brush <NUM>, and finally flows into the liquid collecting cavity <NUM> through the liquid collecting port <NUM> corresponding to the rear rolling brush <NUM>. In addition, the rear liquid scraping strip <NUM> may also be provided with the liquid guiding portion <NUM>, so that the dirty liquid squeezed out from the rear liquid scraping strip <NUM> can also be quickly and thoroughly collected into the liquid collecting cavity <NUM>.

Optionally, both the front liquid scraping strip <NUM> and the rear liquid scraping strip <NUM> may be provided on the upper cover <NUM>. The front liquid scraping strip <NUM>, the rear liquid scraping strip <NUM> and the upper cover <NUM> can be integrally formed, and the front liquid scraping strip <NUM> and the rear liquid scraping strip <NUM> can be symmetrically arranged, so that when the front rolling brush <NUM> rotates counterclockwise and the rear rolling brush <NUM> rotates clockwise, the dirt liquid is squeezed out from the front rolling brush <NUM> and the rear rolling brush <NUM> though the front liquid scraping strip <NUM> and the rear liquid scraping strip <NUM> respectively.

In addition, when the front rolling brush <NUM> and the rear rolling brush <NUM> rotate in opposite directions, under the driving action of each driving mechanism <NUM>, a direction of the force between the front rolling brush <NUM> and the surface to be cleaned, such as floor, is opposite to a direction of the force between the rear rolling brush <NUM> and the surface to be cleaned. When the user moves the cleaning device through the handle <NUM>, the force required for the forward movement and the backward movement is substantially equal, no more force is required for the forward movement (or backward movement). In addition, parameters such as the friction coefficient and contact area of the front rolling brush <NUM> and the rear rolling brush <NUM> and a driving force of each driving mechanism <NUM> can be designed, so that the force between the front rolling brush <NUM> and the rear rolling brush <NUM> and the surface to be cleaned can be equal in magnitude and opposite in direction, so that the force used by the user in the process of pushing the cleaning device forward and pulling the cleaning device back is basically the same, so that the use of the cleaning device is more labor-saving and user experience is improved.

In order to further prevent the splashing of dirty liquid, optionally, a flexible sealing strip may be provided between the upper cover <NUM> and the liquid collecting portion <NUM>. An airtightness between the upper cover <NUM> and the liquid collecting portion <NUM> can be improved by the flexible sealing strip, thus preventing the dirty liquid in the liquid collecting cavity <NUM> from splashing out from the liquid collecting port <NUM>. Specifically, the flexible sealing strip may be made of materials such as rubber or silicone, a shape thereof may be determined according to the shape of a connection between the upper cover <NUM> and the liquid collecting portion <NUM>.

As aforementioned, before or during the cleaning the surface to be cleaned, the cleaning effect of the cleaning device can be improved by spraying clean water. In order to further improve the convenience of the cleaning, preferably, as shown in <FIG> and <FIG>, the cleaning device may further include a liquid spraying mechanism <NUM>. The liquid spraying mechanism <NUM> may be mounted in the housing <NUM>, and the liquid spraying mechanism <NUM> may include a liquid supplying portion <NUM>, a switch, and a spraying portion <NUM>. The spraying portion <NUM> is connected to the liquid supplying portion <NUM> though the switch, and the spraying portion <NUM> cooperates with the front rolling brush <NUM>.

The liquid supplying portion <NUM> can accommodate a preset volume of clean water. Before cleaning, the user can put clean water or clean water mixed with detergent into the liquid supplying portion <NUM>. The user can turn on the switch when cleaning, the clean water contained in the liquid supplying portion <NUM> can be sprayed to the front of the front rolling brush <NUM> through the spraying portion <NUM>. When the front rolling brush <NUM> moves relative to the surface to be cleaned, under the action of the cleaning water, a contact effect between the front rolling brush <NUM> and the surface to be cleaned can be improved, and the clean water can have a certain dissolving effect on the stains, so that the cleaning device has a better cleaning effect on the surface to be cleaned.

Specifically, the liquid supplying portion <NUM> can be mounted in the housing <NUM>. When the cleaning device is provided with the handle <NUM>, the liquid supplying portion <NUM> can also be mounted to the handle <NUM>. The spraying portion <NUM> can also be mounted to the handle <NUM>, which can increase a range that the spraying portion <NUM> can spray to a certain extent, and ensure that the surface to be cleaned in front of the front rolling brush <NUM> can be sprayed with a certain amount of cleaning water, so as to improve the cleaning effect of all parts of the surface to be cleaned. In addition, in the process of secondary cleaning or drying of the surface to be cleaned, the switch can be turned off to prevent the clean water from being continuously sprayed on the surface to be cleaned.

Claim 1:
A cleaning device comprising:
a housing (<NUM>);
a dirty liquid accommodating mechanism (<NUM>) mounted in the housing (<NUM>);
a plurality of rolling brushes mounted in the housing (<NUM>), the rolling brush comprising a cleaning portion (<NUM>) and a mounting portion (<NUM>), the cleaning portion (<NUM>) surrounding an outer periphery of the mounting portion (<NUM>), each of the cleaning portions (<NUM>) cooperating with the dirty liquid accommodating mechanism (<NUM>); and
a driving mechanism (<NUM>) connected to at least one of the mounting portions (<NUM>) to drive each of the mounting portions (<NUM>) to rotate;
wherein the plurality of the rolling brushes comprises a front rolling brush (<NUM>) and a rear rolling brush (<NUM>), in a moving direction of the rolling brushes, the front rolling brush (<NUM>) is located in front of the rear rolling brush (<NUM>), and at least a part of a projection of the front rolling brush (<NUM>) is located within a projection of the rear rolling brush (<NUM>);
characterized in that
the dirty liquid accommodating mechanism (<NUM>) comprises a liquid collecting portion (<NUM>) and a top covering portion (<NUM>), the top covering portion (<NUM>) and the liquid collecting portion (<NUM>) enclose a liquid collecting cavity (<NUM>), the top covering portion (<NUM>) is provided with a liquid collecting port (<NUM>), the top covering portion (<NUM>) comprises a capping wall (<NUM>), a blocking wall (<NUM>) and a liquid guiding wall (<NUM>), under a cooperation of the liquid guiding wall (<NUM>) and the blocking wall (<NUM>), dirty liquid is collected into the liquid collecting cavity (<NUM>) from the liquid collecting port (<NUM>) located at a junction between the liquid guiding wall (<NUM>) and the blocking wall (<NUM>);
wherein at least a part of the liquid collecting port (<NUM>) is located on the blocking wall (<NUM>), so that during a process that the dirty liquid is squeezed out from the rolling brush and flows to the liquid collecting port (<NUM>) along the liquid guide wall (<NUM>), an interior of the liquid collecting cavity (<NUM>) is in communication with an outside of the liquid collecting cavity (<NUM>) through the part of the liquid collecting port (<NUM>) located on the blocking wall (<NUM>).