Cleaning head of surface cleaner and surface cleaner

Abstract

The utility model provides a cleaning head of a surface cleaner. The cleaning head comprises a shell assembly, a stirrer, an autonomous driving wheel and a driven wheel. The shell assembly defines a containing cavity, an avoiding part is defined behind the shell assembly, and at least one part of the avoiding part is located on the bottom face of the shell assembly. The stirrer is arranged in the containing cavity of the shell assembly and can be driven to rotate. The autonomous driving wheel is at least partially arranged in the avoiding part, and the autonomous driving wheel can be driven to rotate relative to the shell assembly; the driven wheel can rotate relative to the shell assembly; when the stirrer is in contact with a surface to be cleaned, the autonomous driving wheel and the driven wheel are both in contact with the surface to be cleaned; when the stirrer breaks away from the surface to be cleaned and the bottom face of the shell assembly and the surface to be cleaned form a first angle, the autonomous driving wheel breaks away from the surface to be cleaned, and the driven wheel makes contact with the surface to be cleaned. The utility model further provides a surface cleaner.

Description

Technical Field

[0001] The present invention relates to a cleaning head of a surface cleaner and the surface cleaner. Background Art

[0002] This section merely provides background information related to the present disclosure and is not necessarily prior art.

[0003] Wet surface cleaners are cleaning equipment suitable for cleaning various hard surfaces in home or office environments.

[0004] Typically, a wet surface cleaner includes a liquid delivery system for wetting the dirt on the surface to be cleaned and mixing the dirt and cleaning liquid through the agitation of an agitator. The mixture of dirt and cleaning liquid is collected into a recovery tank through a vacuum suction port of the wet surface cleaner close to the surface to be cleaned, and the recovery tank is now in fluid communication with a vacuum source.

[0005] Traditional wet surface cleaners can only be driven back and forth by the user's hand. The agitator of the wet surface cleaner needs a certain friction with the surface to be cleaned to remove the dirt adhered to the surface to be cleaned, and the load of the wet surface cleaner is usually heavy, which makes the user easily tired.

[0006] In particular, when the user carries the wet surface cleaner from the base station to the area to be cleaned, or drags the wet surface cleaner back to the base station, the user is often required to lift the entire wet surface cleaner, which undoubtedly affects the user's experience. Utility Model Content

[0007] In order to solve one of the above technical problems, the present disclosure provides a cleaning head of a surface cleaner and a surface cleaner.

[0008] According to one aspect of the present disclosure, there is provided a cleaning head for a surface cleaner, comprising:

[0009] A housing component, wherein the housing component defines a receiving chamber, and a relief portion is defined at the rear of the housing component, and at least a portion of the relief portion is located on the bottom surface of the housing component;

[0010] an agitator, the agitator being disposed in the receiving chamber of the housing assembly and being capable of being driven to rotate;

[0011] an autonomous drive wheel disposed at least partially within the avoidance portion and capable of being driven to rotate relative to the housing assembly; and

[0012] a driven wheel, the driven wheel being rotatable relative to the housing assembly;

[0013] Wherein, when the agitator contacts the surface to be cleaned, both the self-driven wheel and the driven wheel contact the surface to be cleaned; when the agitator disengages from the surface to be cleaned and the bottom surface of the housing assembly forms a first angle with the surface to be cleaned, the self-driven wheel disengages from the surface to be cleaned and the driven wheel contacts the surface to be cleaned.

[0014] For the cleaning head of the surface cleaner according to at least one embodiment of the present disclosure, the first angle is an angle greater than or equal to 2.5°.

[0015] For the cleaning head of the surface cleaner according to at least one embodiment of the present disclosure, when the cleaning head is located on the surface to be cleaned, at least a part of the self-driven wheel is within the projection range of the housing assembly on the surface to be cleaned.

[0016] For the cleaning head of the surface cleaner according to at least one embodiment of the present disclosure, when the cleaning head is located on the surface to be cleaned, the self-driven wheel is within the projection range of the housing assembly on the surface to be cleaned.

[0017] For the cleaning head of the surface cleaner according to at least one embodiment of the present disclosure, when the cleaning head is located on the surface to be cleaned, the driven wheel straddles the boundary of the projection range of the housing assembly on the surface to be cleaned.

[0018] For the cleaning head of the surface cleaner according to at least one embodiment of the present disclosure, when the cleaning head is located on the surface to be cleaned, the self-driven wheel has a first projection on the surface to be cleaned, and the driven wheel has a second projection on the surface to be cleaned, and the first projection is generally closer to the agitator than the second projection.

[0019] For the cleaning head of the surface cleaner according to at least one embodiment of the present disclosure, when the cleaning head is located on the surface to be cleaned, the self-driven wheel has a first projection on the surface to be cleaned, and the driven wheel has a second projection on the surface to be cleaned, and the rear end of the first projection is farther from the agitator than the rear end of the second projection.

[0020] For the cleaning head of the surface cleaner according to at least one embodiment of the present disclosure, the outer diameter dimension of the self-driven wheel is greater than the outer diameter dimension of the driven wheel.

[0021] For the cleaning head of the surface cleaner according to at least one embodiment of the present disclosure, the rotation axis of the self-driven wheel is closer to the agitator than the rotation axis of the driven wheel.

[0022] For the cleaning head of the surface cleaner according to at least one embodiment of the present disclosure, the driven wheel includes a left driven wheel and a right driven wheel, and the left driven wheel and the right driven wheel are respectively arranged on the left side and the right side of the avoidance part of the housing assembly.

[0023] According to another aspect of the present disclosure, there is provided a surface cleaner, comprising:

[0024] a main body portion,

[0025] a handle portion detachably connected to the main body portion, the handle portion including user interaction buttons;

[0026] a recovery tank fluidly connected to a suction source;

[0027] a supply tank for storing a cleaning liquid;

[0028] an electric pump fluidly connected to the supply tank;

[0029] a cleaning head connected to the main body portion through a connecting portion, and enabling the main body portion to pivot relative to the cleaning head about at least one axis as a whole; wherein, the cleaning liquid in the supply tank can be provided to the cleaning head or a surface to be cleaned near the cleaning head through the electric pump; dirt and the cleaning liquid after the cleaning head cleans the surface to be cleaned are collected into the recovery tank;

[0030] wherein, the cleaning head is the cleaning head of the surface cleaner as described above.

[0031] For the surface cleaner according to at least one embodiment of the present disclosure, when an external force is applied to the handle portion, the main body portion can rotate between an angle of a parallel posture parallel to the surface to be cleaned and an angle of a self-supporting posture, wherein, the angle of the parallel posture is 0° to 5°. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The drawings illustrate exemplary embodiments of the present disclosure and, together with the description thereof, are used to explain the principles of the present disclosure, including these drawings to provide a further understanding of the present disclosure, and the drawings are included in this specification and form a part of this specification.

[0033] Figure 1 is a schematic structural diagram of a surface cleaner according to an embodiment of the present disclosure.

[0034] Figure 2 is a schematic structural diagram of the surface cleaner according to an embodiment of the present disclosure from another angle.

[0035] Figure 3 is a schematic structural diagram of a surface cleaner according to another embodiment of the present disclosure.

[0036] Figure 4 is a schematic structural diagram of a charging interface of a surface cleaner according to an embodiment of the present disclosure.

[0037] Figure 5 It is a schematic structural diagram of a surface cleaner according to another embodiment of the present disclosure.

[0038] Figure 6 It is a schematic diagram of the positional relationship between the self-driving wheel and the driven wheel of the surface cleaner according to another embodiment of the present disclosure.

[0039] Specifically, the reference numerals in the figure are as follows:

[0040] 100 Handle part

[0041] 200 Main body part

[0042] 210 Main body housing

[0043] 220 Avoidance area

[0044] 300 Supply tank

[0045] 400 Recovery tank

[0046] 500 Connection part

[0047] 600 Cleaning head

[0048] 610 Housing assembly

[0049] 611 Mounting boss

[0050] 620 Stirrer

[0051] 630 Self-driving wheel

[0052] 640 Left driven wheel

[0053] 650 Right driven wheel

[0054] 660 Charging interface. Specific embodiments

[0055] The present disclosure will be further described in detail below in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the relevant content and do not limit the present disclosure. In addition, it should be noted that for the convenience of description, only the parts related to the present disclosure are shown in the drawings.

[0056] It should be noted that, without conflict, the embodiments in the present disclosure and the features in the embodiments can be combined with each other. The technical solutions of the present disclosure will be described in detail below with reference to the drawings and embodiments.

[0057] Unless otherwise specified, the illustrated exemplary embodiments are to be understood as providing exemplary features of various details of some ways in which the technical concept of the present disclosure can be implemented in practice. Accordingly, unless otherwise specified, the features of the various embodiments can be combined, separated, interchanged, and / or rearranged additionally without departing from the technical concept of the present disclosure.

[0058] In the drawings, the use of cross-hatching and / or shading is generally used to clarify the boundaries between adjacent components. Thus, unless otherwise stated, the presence or absence of cross-hatching or shading does not convey or imply any preference or requirement regarding the specific materials, material properties, dimensions, proportions, commonality between the components shown, and / or any other characteristics, attributes, properties, etc. of the components. Additionally, in the drawings, the dimensions and relative dimensions of components may be exaggerated for clarity and / or descriptive purposes. When the exemplary embodiments can be implemented differently, the specific process orders can be performed in a different order than that described. For example, two consecutively described processes can be performed substantially simultaneously or in an order opposite to that described. Further, the same reference numerals denote the same components.

[0059] When a component is referred to as being "on" or "above" another component, "connected to" or "coupled to" another component, the component can be directly on the other component, directly connected to or directly coupled to the other component, or there can be intervening components. However, when a component is referred to as being "directly on" another component, "directly connected to" or "directly coupled to" another component, there are no intervening components. For this reason, the term "connected" can refer to a physical connection, an electrical connection, etc., and can have or not have intervening components.

[0060] For descriptive purposes, the present disclosure may use spatial relative terms such as "under", "below", "beneath", "down", "above", "on", "over", "upper", and "side (e.g., as in "sidewall")" to describe the relationship of one component to another (other) component as shown in the drawings. In addition to the orientations depicted in the drawings, the spatial relative terms are also intended to encompass different orientations of the device during use, operation, and / or manufacture. For example, if the device in the drawings is flipped, a component described as "under" or "beneath" another component or feature will then be positioned "above" the other component or feature. Thus, the exemplary term "under" can encompass both the "above" and "below" orientations. Further, the device can be positioned otherwise (e.g., rotated 90 degrees or at other orientations), and accordingly, the spatial relative descriptors used herein are to be interpreted.

[0061] The terms used herein are for the purpose of describing particular embodiments and are not intended to be limiting. As used herein, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are also intended to include the plural forms. In addition, when the terms "comprise" and / or "include" and their variants are used in this specification, it is stated that there are the stated features, integers, steps, operations, components, assemblies and / or groups thereof, but does not exclude the presence or addition of one or more other features, integers, steps, operations, components, assemblies and / or groups thereof. It should also be noted that, as used herein, the terms "substantially", "about" and other similar terms are used as approximate terms and not as terms of degree, so they are used to explain the inherent deviations of measured, calculated and / or provided values that would be recognized by a person of ordinary skill in the art.

[0062] Figure 1 is a schematic structural view of a surface cleaner according to an embodiment of the present disclosure. Figure 2 is a schematic structural view of another angle of the surface cleaner according to an embodiment of the present disclosure. Figure 3 is a schematic structural view of a surface cleaner according to another embodiment of the present disclosure.

[0063] As Figures 1 to 3 shown, the surface cleaner of the present disclosure is arranged to be capable of performing wet cleaning on a surface to be cleaned, wherein the surface to be cleaned can be a floor surface, preferably a household floor surface. At the same time, after the surface cleaner performs wet cleaning on the floor surface, the liquid (sewage) after cleaning the surface to be cleaned can be recovered into the surface cleaner.

[0064] Specifically, the surface cleaner may include components such as a handle portion 100, a main body portion 200, a supply tank 300, a recovery tank 400, a connection portion 500, and a cleaning head 600.

[0065] The handle portion 100 is used to operate the surface cleaner. More specifically, on the one hand, the operator can control the attitude of the surface cleaner by operating the handle portion 100.

[0066] For example, when the main body portion 200 of the surface cleaner can rotate between an angle of a parallel attitude parallel to the surface to be cleaned and an angle of a self-supporting attitude, wherein the angle of the parallel attitude is 0° to 5°.

[0067] User interaction buttons may be provided on the handle portion 100, and the user interaction buttons may be physical buttons, so as to control the surface cleaner through these physical buttons, such as controlling the start and stop of the surface cleaner and controlling the liquid supply speed and suction power of the surface cleaner, etc., so as to make the user experience of the surface cleaner better.

[0068] The handle portion 100 can be disposed at the upper end of the main body portion 200, and the handle portion 100 can be detachably connected to the main body portion 200, so that the surface cleaner can be operated by operating the handle portion 100. In the present disclosure, the main body portion 200 is formed as the main stress structure of the surface cleaner, and the recovery tank 400 of the surface cleaner can be directly or indirectly fixed to the main body portion 200.

[0069] As Figures 1 to 3 shown, the main body portion 200 is formed with an accommodation space, and the recovery tank 400 is detachably disposed in the main body portion 200 and located in the accommodation space. When the liquid stored in the recovery tank 400 is relatively large, the user can remove the recovery tank 400, pour out the internal sewage and clean up the solid waste. At this time, a part of the outer surface of the recovery tank 400 forms a part of the outer surface of the surface cleaner.

[0070] In order to recover the liquid after cleaning the surface to be cleaned, the recovery tank 400 can be connected to the cleaning head 600 through a recovery pipeline. Correspondingly, the mixture of sewage and gas (dirty) can be recovered to the recovery tank 400 through this recovery pipeline.

[0071] In the present disclosure, the surface cleaner further includes an electric suction source (not shown in the figure). The electric suction source can include a vacuum motor, so that a vacuum (negative pressure) can be generated through the electric suction source. At the same time, the electric suction source can be connected to the recovery tank 400, so as to provide this negative pressure to the recovery tank 400, thereby realizing the forced flow of gas and sewage in the recovery pipeline. In the present disclosure, the gas discharged from the electric suction source can flow to the outside of the surface cleaner through the gaps on a part of the outer surface of the surface cleaner.

[0072] In a preferred embodiment, the recovery tank 400 can be located at the rear of the main body portion 200.

[0073] The main body portion 200 is connected to the cleaning head 600 through a connecting portion 500, so that the main body portion 200 is pivotally connected to the cleaning head 600. In the present disclosure, the main body portion 200 has at least two rotational degrees of freedom relative to the cleaning head 600, so that the user can operate the surface cleaner more conveniently.

[0074] When the surface cleaner of the present disclosure is in use, the cleaning head 600 is configured to be able to move on the surface to be cleaned to perform wet cleaning on the surface to be cleaned through the cleaning head 600.

[0075] As Figures 1 to 3 shown, the cleaning head 600 of the present disclosure can include components such as a housing assembly 610, a stirrer 620, a self-driving wheel 630, a left driven wheel 640, and a right driven wheel 650.

[0076] The housing assembly 610 is configured to be connected to the main body 200 through the connecting portion 500, and the housing assembly 610 is capable of moving on the surface to be cleaned. The surface of the housing assembly 610 close to the surface to be cleaned is formed as the bottom surface of the housing assembly 610. When the surface cleaner is cleaning the surface to be cleaned, the user can operate the surface cleaner so that the surface cleaner can move in the front-rear direction, where the forward direction is the direction in which the cleaning head 600 is away from the user, and correspondingly, the backward direction is the direction in which the cleaning head 600 is close to the user. At the same time, the left and right directions can be defined by the forward and backward directions.

[0077] The housing assembly 610 can define a receiving chamber for the cleaning head, and the receiving chamber is located in the front half of the cleaning head 600 so as to receive the agitator 620 in the receiving chamber. Correspondingly, the agitator 620 is also located in the front half of the cleaning head 600.

[0078] A suction nozzle is formed on the housing assembly 610. In the present disclosure, the suction nozzle is disposed adjacent to the agitator 620 and is located behind the agitator 620. In the present disclosure, the suction nozzle is connected to the recovery pipeline and is formed as the starting point of the recovery path. That is to say, the suction nozzle of the present disclosure can communicate with the recovery tank 400 of the surface cleaner.

[0079] The agitator 620 is configured to agitate the surface to be cleaned; that is, when the surface cleaner is performing a cleaning operation or a self-cleaning operation, the agitator 620 can be driven by the motor to rotate, whereby the agitator 620 can make frictional contact with the surface to be cleaned, that is, the agitator 620 can cooperate with the cleaning liquid to scrub the surface to be cleaned to achieve the cleaning of the surface to be cleaned. During the frictional contact between the agitator 620 and the surface to be cleaned, the cleaning liquid can be supplied to the agitator 620 or the surface to be cleaned near the agitator 620, so as to achieve the wet cleaning of the surface to be cleaned.

[0080] In addition, a relief portion is defined at the rear of the housing assembly 610, and at least a part of the relief portion is located on the bottom surface of the housing assembly 610; in a specific embodiment, the relief portion of the housing assembly 610 can be formed as a groove of the housing assembly 610; and at least part of the opening of the groove faces the rear of the housing assembly 610, and at least part of the opening of the groove faces the bottom of the housing assembly 610.

[0081] The self-driven wheel 630 is at least partially disposed within the avoidance portion, and the self-driven wheel 630 can be driven to rotate relative to the housing assembly 610; that is to say, the self-driven wheel 630 of the present disclosure may include a driving wheel shaft and a driving wheel body fixedly connected. Both ends of the driving wheel shaft are rotatably supported on the left and right side walls of the avoidance portion respectively, and at least a part of the driving wheel shaft extends into the interior of the housing assembly 610. At this time, a driving motor may be disposed inside the housing assembly 610, and the driving motor can drive the driving wheel shaft to rotate, so that the self-driven wheel 630 rotates.

[0082] In a preferred embodiment, the left driven wheel 640 and the right driven wheel 650 may be referred to as driven wheels. Or rather, the driven wheels of the present disclosure may include the left driven wheel 640 and the right driven wheel 650.

[0083] In the present disclosure, the left driven wheel 640 and the right driven wheel 650 are respectively disposed on the left and right sides of the avoidance portion of the housing assembly 610, and both the left driven wheel 640 and the right driven wheel 650 can rotate relative to the housing assembly 610. That is to say, the self-driven wheel 630 of the present disclosure is located between the left driven wheel 640 and the right driven wheel 650.

[0084] Specifically, the left driven wheel 640 and the right driven wheel 650 of the present disclosure have the same structure and the same dimensions. Taking one of the driven wheels 640 as an example, the structure of the left driven wheel 640 and the right driven wheel 650 will be described.

[0085] In the present disclosure, the driven wheel 640 may include a driven wheel body and a driven wheel shaft; the driven wheel body is rotatably disposed on the driven wheel shaft, and both ends of the driven wheel shaft can be fixed to the housing assembly 610, whereby the driven wheel body of the present disclosure can rotate relative to the housing assembly.

[0086] Thus, when the cleaning head 600 of the surface cleaner of the present disclosure is located on the surface to be cleaned, the self-driven wheel 630, the left driven wheel 640 and the right driven wheel 650 can all contact the surface to be cleaned. Correspondingly, the cleaning head 600 of the surface cleaner of the present disclosure can be supported by the self-driven wheel 630, the left driven wheel 640 and the right driven wheel 650.

[0087] In a preferred embodiment, the avoidance portion is disposed at the central position behind the housing assembly 610; correspondingly, the self-driven wheel 630 is also located at the central position behind the housing assembly 610.

[0088] Meanwhile, the left driven wheel 640 and / or the right driven wheel 650 are located behind the housing assembly 610. That is to say, the self-driving wheel 630, the left driven wheel 640, and the right driven wheel 650 of the present disclosure can support the cleaning head 600 of the surface cleaner from the rear. Accordingly, the agitator 620 can support the cleaning head 600 of the surface cleaner from the front. Thus, the agitator 620 can contact the surface to be cleaned with pressure, so that the agitator 620 can clean the surface to be cleaned more efficiently.

[0089] In the present disclosure, the outer diameter dimension of the self-driving wheel 630 is larger than that of the driven wheel. Thus, the self-driving wheel 630 of the present disclosure can bear a greater downward pressure than the driven wheel. In addition, the width of the self-driving wheel 630 is also larger than that of the driven wheel, so that the self-driving wheel 630 can provide a greater driving force without slipping.

[0090] In one embodiment, as Figure 2 shown, a mounting boss 611 is defined at the bottom of the housing assembly 610 of the present disclosure. An avoidance space is defined on the mounting boss 611. The driven wheel is at least partially disposed in the avoidance space and can rotate relative to the housing assembly 610.

[0091] In another embodiment, as Figure 3 shown, an avoidance portion is formed on the housing assembly 610, and a driven wheel is disposed in the avoidance portion. That is to say, the left driven wheel 640 and / or the right driven wheel 650 of the present disclosure are respectively disposed in an avoidance portion. At this time, three avoidance portions are defined at the rear end of the housing assembly 610. The avoidance portion in the middle has a larger size for installing the self-driving wheel, and the avoidance portions on both sides have smaller sizes for installing the left driven wheel 640 and / or the right driven wheel 650.

[0092] In the present disclosure, the distance from the avoidance portion to the left driven wheel 640 is substantially equal to the distance to the right driven wheel 650. That is to say, there is a first distance between the self-driving wheel 630 and the left driving wheel 640, and there is a second distance between the self-driving wheel 630 and the right driving wheel 640. The first distance is substantially the same as the second distance.

[0093] In the vertical direction, when the cleaning head 600 is located on the surface to be cleaned, at least a part of the self-driving wheel 630 is within the projection range of the housing assembly 610 on the surface to be cleaned. Moreover, as Figure 3 shown, when the cleaning head 600 is located on the surface to be cleaned, at least a part of the left driven wheel 640 and / or the right driven wheel 650 is outside the projection range of the housing assembly 610 on the surface to be cleaned.

[0094] Similarly, as Figure 2As shown, when the cleaning head 600 is located on the surface to be cleaned, at least a part of the driven wheel is within the projection range of the housing assembly 610 on the surface to be cleaned. Thus, the self-driven wheel 630, the left drive wheel 640, and the right drive wheel 650 of the present disclosure can more stably support the cleaning head of the surface cleaner.

[0095] In a preferred embodiment, as Figure 4 shown, the cleaning head 600 of the surface cleaner further includes two charging interfaces 660, and the two charging interfaces 660 are disposed near the avoidance portion at the bottom of the housing assembly 610. More preferably, the two charging interfaces 660 are respectively located on both sides of the avoidance portion on the bottom surface of the housing assembly 610. Thus, the base station can charge the rechargeable battery of the surface cleaner through these two charging interfaces 660.

[0096] In the present disclosure, the main body portion 200 includes a main body housing, and a position on the main body housing near the connection portion includes an avoidance area 220 to avoid interference between the main body housing 210 and the self-driven wheel 630 during the pivoting of the main body portion as a whole relative to the cleaning head 600 about at least one axis; in other words, when the surface cleaner of the present disclosure is in a lying flat state, the main body housing 210 will not collide with the cleaning head 600 either.

[0097] The supply tank 300 of the present disclosure is formed in the shape of a box to store the cleaning liquid in the supply tank 300. In one embodiment, the cleaning liquid can be purified water. Of course, those skilled in the art should know that a mixture of purified water and a cleaning agent, etc. can also be stored in the supply tank 300.

[0098] In one embodiment, a receiving space is formed on the main body portion 200, and the supply tank 300 can be disposed in the receiving space, and a part of the outer surface of the supply tank 300 forms a part of the outer surface of the surface cleaner.

[0099] In another embodiment, as Figures 1 to 3 shown, the supply tank 300 of the present disclosure can be disposed on the housing assembly 610; in other words, the supply tank 300 of the present disclosure can be formed as a part of the cleaning head 600. Moreover, the supply tank 300 can be detached from the housing assembly 610 and the cleaning liquid can be filled manually by the user.

[0100] In the present disclosure, to achieve wet cleaning of the surface to be cleaned, the supply tank 300 can be connected to an electric pump (not shown in the figure), so that the cleaning liquid in the supply tank 300 can be pressurized by the electric pump and then provided to the stirrer 620. Thus, wet cleaning of the surface to be cleaned can be achieved through the cleaning liquid. In a preferred embodiment, the electric pump is disposed inside the housing assembly 610, and correspondingly, the electric pump also forms a part of the cleaning head 600.

[0101] The drive prevention of the self-driven wheel of the present disclosure will be described below.

[0102] In the present disclosure, the driving modes of the self-driven wheel 630 may include driving in clockwise and counterclockwise directions. The left and right driven wheels may be respectively installed on both sides of the cleaning head, and the left and right driven wheels rotate independently. When the surface cleaner moves straight forward, the left and right driven wheels rotate clockwise at the same speed under the friction force of the surface to be cleaned; when the surface cleaner moves straight backward, the left and right driven wheels rotate counterclockwise at the same speed under the friction force of the surface to be cleaned; when the surface cleaner turns left or right forward, the left and right driven wheels rotate independently clockwise at different speeds under the friction force of the surface to be cleaned.

[0103] The driving device for driving the self-driven wheel 630 to rotate may be a motor, and the motor can actively drive the self-driven wheel 630 by applying current. When current is applied to the motor, the self-driven wheel 630 will rotate.

[0104] In one example, an encoder is included on the cleaning head of the surface cleaner for detecting the rotational speed and direction of the motor. The encoder can also sense the rotational speed of the self-driven wheel 630 and calculate the moving speed and direction of the surface cleaner based on the rotational speed of the motor or the directly measured rotational speed of the self-driven wheel 630.

[0105] More specifically, the encoder can calculate the moving direction and speed, such as the states when the surface cleaner is moving forward and backward. Moving forward and backward on the surface to be cleaned are the most main action states during the working process of the surface cleaner.

[0106] The encoder is configured to control the self-driven wheel 630 and measure the rotation amount and direction of the self-driven wheel 630 to evaluate the movement or intention of the user. This evaluation is based on the rotational speed and acceleration sensed by the encoder, enabling accurate identification of whether the speed and acceleration change due to user manipulation or ground load changes.

[0107] The encoder can be installed on the motor, and the axis of the motor is inserted into the encoder, so that the encoder can detect the rotational speed of the motor and send the current revolutions per minute of the motor to the controller. The encoder can also send information about the rotation direction of the motor.

[0108] After receiving the rotational speed information detected by the encoder, the controller can calculate the moving speed of the surface cleaner on the surface to be cleaned based on this information. The acceleration of the surface cleaner can be calculated by multiplying the rotational speed by the outer diameter of the self-driven wheel 630.

[0109] The controller can also control the motor based on the rotational speed information detected by the encoder, and further control the movement of the surface cleaner. The controller adjusts the rotational speed of the motor through feedback, enabling the rotational speed of the motor to be adjusted according to actual needs rather than remaining constant. For example, in some cases, the rotational speed of the motor will increase, while in other cases, it may decrease.

[0110] The rotational speed of the motor can also vary according to the current applied to the motor. The higher the current, the higher the rotational speed of the motor generally follows.

[0111] In one example, through the feedback of the self - driving wheels 630, the moving direction and speed of the surface cleaner can be precisely adjusted according to the user's position or intention.

[0112] When the speed of the surface cleaner reaches or exceeds the preset value, the controller applies current to the drive motor and its connected self - driving wheels 630. Conversely, when the surface cleaner is stationary or its moving speed is lower than the preset value, the controller no longer applies current.

[0113] For a handheld wet surface cleaner, the user can push or pull the surface cleaner through the handle, and the preset speed value can be set as the minimum speed for performing the cleaning operation. The user can also hold the handle and tilt the main body of the surface cleaner to a preset angle (for example, in a parallel posture parallel to the surface to be cleaned). At this time, the self - driving wheels 630 may rotate but are not electrically driven, indicating that the user is preparing to place the surface cleaner flat and does not immediately need the assistance of the self - driving wheels 630 to move the surface cleaner for cleaning.

[0114] The preset speed value of the surface cleaner can be adjusted according to the floor load or usage conditions. Carpets have a higher resistance value than hard floors. Therefore, the greater the floor load, the smaller the preset value, and vice versa.

[0115] When the user slightly pushes the surface cleaner, the surface cleaner can move on a hardwood floor. Even when the force applied by the user is small when tilting the handheld wet surface cleaner, the surface cleaner can still move forward.

[0116] Therefore, when the encoder detects that the speed of the surface cleaner is lower than the preset value, it is preferably not to drive the self - driving wheels 630, otherwise the surface cleaner may move in an unexpected direction, causing inconvenience to the user.

[0117] For example, if the surface cleaner immediately energizes the motor of the self - driving wheels 630 when the user applies an external force through the handle to tilt the surface cleaner, causing the cleaning head to move forward immediately, the user may lose control of the handle, resulting in the surface cleaner slipping out of the hand and falling on the floor.

[0118] Therefore, current will only be applied to the motor when the speed of the surface cleaner reaches a preset value. Preferably, after the speed reaches the preset value, current is continuously applied to the motor.

[0119] After the speed of the surface cleaner is higher than the preset value, the current applied to the motor will increase with the increase in speed.

[0120] When the user speeds up the surface cleaner, it indicates that the user hopes to move the surface cleaner faster. Therefore, the increase in the current of the motor can reduce the force required by the user to apply to the surface cleaner.

[0121] The higher the speed, the greater the current applied to the motor. Through the feedback control of the motor by the encoder, the applied current increases proportionally with the motor speed. The time point for applying current can be the time point when the moving speed of the surface cleaner reaches the preset value.

[0122] When the surface cleaner works on the surface to be cleaned, it usually moves back and forth repeatedly, with the speed increasing first and then decreasing, and then pausing for a moment before moving in the reverse direction.

[0123] In a typical application of the surface cleaner, the time point for applying current can be judged according to the moving speed of the surface cleaner.

[0124] According to an embodiment of the present disclosure, the user can easily control the surface cleaner to move forward and backward. Especially for a heavier surface cleaner, the present disclosure can significantly reduce the difficulty of user operation.

[0125] In one example, the surface cleaner moves according to the user operation and detects whether it is the first drive during the first movement, so as to determine whether the surface cleaner has completely stopped.

[0126] By detecting the changes in rotational speed and acceleration, it is possible to distinguish between a temporary stop and a complete stop. For example, when both the rotational speed and acceleration reach zero within 1 second, it can be determined that the surface cleaner has completely stopped; if only the rotational speed is zero and the acceleration is not zero, it is a temporary stop.

[0127] Once the first movement is detected, the encoder senses the rotational speed of the motor and converts it into the speed of the surface cleaner, and the controller calculates the speed of the surface cleaner based on this.

[0128] Then, the controller determines whether the speed reaches the preset value and applies current to drive the motor. The applied current is proportional to the moving speed of the surface cleaner and increases with the increase in speed. This process is continuously repeated until the surface cleaner stops moving.

[0129] When both the speed and acceleration are zero, the application of current stops. The time for applying current is only based on the speed change, while the time for stopping the application of current takes into account both the speed and acceleration.

[0130] By considering the acceleration and speed of the surface cleaner, the magnitude of the current applied to the motor can be determined, thereby optimizing the user experience.

[0131] Figure 5 It is a schematic structural diagram of a surface cleaner according to another embodiment of the present disclosure.

[0132] As Figure 5 shown, in the cleaning head of the surface cleaner of the present disclosure, its self-driven wheel 630, left driven wheel 640, and right driven wheel 650 are arranged such that: when the agitator 620 contacts the surface to be cleaned, the self-driven wheel 630, left driven wheel 640, and right driven wheel 650 all contact the surface to be cleaned; when the agitator 620 disengages from the surface to be cleaned and the bottom surface of the housing assembly 610 forms a first angle with the surface to be cleaned, the self-driven wheel 630 disengages from the surface to be cleaned, and the left driven wheel 640 and right driven wheel 650 contact the surface to be cleaned.

[0133] In other words, when the surface cleaner of the present disclosure is cleaning the surface to be cleaned, the agitator 620, self-driven wheel 630, left driven wheel 640, and right driven wheel 650 all contact the surface to be cleaned, thereby realizing the cleaning operation of the surface to be cleaned through the agitator 620, and through the contact of the self-driven wheel 630, left driven wheel 640, and right driven wheel 650 with the surface to be cleaned, the surface cleaner can be stably supported, and also through the driving force provided by the self-driven wheel 630, the surface cleaner can move forward or backward autonomously, or when the user slightly applies a forward or backward force, the surface cleaner can be operated to move forward or backward.

[0134] That is to say, the self-driven wheel 630 of the present disclosure can be supplied with electric energy to be able to rotate forward or backward, so as to be able to provide a forward or backward driving force through the self-driven wheel 630.

[0135] In addition, when the surface cleaner needs to be dragged, the user can keep the main body part 200 of the surface cleaner and the cleaning head 600 in a locked state, that is, there will be no relative rotation between the main body part 200 and the cleaning head 600 at this time. Then, when the user applies a rotational torque in the lateral direction of the cleaning head 600 to the main body part 200 of the surface cleaner, the surface cleaner will rotate about the contact area of the left driven wheel 640 and the right driven wheel 650 with the surface to be cleaned as the axis, and the agitator 620 of the cleaning head 600 will disengage from the surface to be cleaned. Wherein, the lateral direction is a horizontal direction perpendicular to or substantially perpendicular to the direction of the surface cleaner moving forward or backward when cleaning the surface to be cleaned. Or rather, the lateral direction is a direction parallel or substantially parallel to the rotation axis of the agitator 620.

[0136] Then, when the bottom surface of the housing assembly 610 forms a first angle with the surface to be cleaned, the self-driven wheel 630 disengages from the surface to be cleaned, and the left driven wheel 640 and the right driven wheel 650 are in contact with the surface to be cleaned, thus facilitating the user to drag the surface cleaner.

[0137] In a preferred embodiment, considering the material of the agitator 620, it may undergo a certain amount of deformation. Therefore, a lower limit value needs to be set for this first angle. Specifically, the first angle in the present disclosure is an angle greater than or equal to 2.5°.

[0138] In addition, the upper limit value of the first angle is determined by the supplementary angle of the angle between the outer tangent lines of the self-driven wheel 630 and the left driven wheel 640 (the right driven wheel 650 and the left driven wheel 640 have the same axis of rotation and the same structure). That is to say, in the extreme case, the surface cleaner cannot be rotated to a position where the self-driven wheel 630 contacts the surface to be cleaned again. In a preferred embodiment, the upper limit value of the first angle can be set to be less than or equal to 45° to facilitate the user to drag the surface cleaner.

[0139] As Figure 5 shown, when the cleaning head is on the surface to be cleaned, the self-driven wheel 630 is within the projection range of the housing assembly 610 on the surface to be cleaned. More preferably, when the cleaning head is on the surface to be cleaned, the left driven wheel 640 and / or the right driven wheel 650 straddle the boundary of the projection range of the housing assembly 610 on the surface to be cleaned, so that during the dragging process of the surface cleaner, the housing assembly 610 does not contact the surface to be cleaned.

[0140] Figure 6 is a schematic diagram of the positional relationship between the self-driven wheel and the driven wheels of a surface cleaner according to another embodiment of the present disclosure.

[0141] As Figure 5 and Figure 6 shown, in the present disclosure, when the cleaning head is on the surface to be cleaned, the self-driven wheel 630 has a first projection on the surface to be cleaned, and the left driven wheel 640 and the right driven wheel 650 have a second projection on the surface to be cleaned. The first projection is generally closer to the agitator 630 than the second projection.

[0142] On the other hand, since the outer diameter of the self-driven wheel 630 is larger than that of the driven wheels, when the cleaning head is on the surface to be cleaned, the self-driven wheel 630 has a first projection on the surface to be cleaned, and the left driven wheel 640 and the right driven wheel 650 have a second projection on the surface to be cleaned. The rear end of the first projection is farther from the agitator 630 than the rear end of the second projection.

[0143] In the present disclosure, the rotation axis of the self-driven wheel 630 is closer to the agitator 630 than the rotation axis of the driven wheel; moreover, the rotation axis of the self-driven wheel 630 is located at a higher position than the rotation axis of the driven wheel.

[0144] Accordingly, when the surface cleaner of the present disclosure is being dragged, since the self-driven wheel 630 does not contact the surface to be cleaned, correspondingly, the self-driven wheel 630 does not impede the dragging process. Thus, the dragging process is relatively easy. In other words, when dragging the surface cleaner back to the base station, it is relatively smooth. Additionally, the surface cleaner of the present disclosure can also avoid the wear of the internal structure caused by directly dragging the self-driven wheel 630 and shorten the service life of the self-driven wheel 630.

[0145] In the description of this specification, the description with reference to terms such as "one embodiment / way", "some embodiments / ways", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment / way or example are included in at least one embodiment / way or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment / way or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments / ways or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments / ways or examples described in this specification and the features of different embodiments / ways or examples.

[0146] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0147] Those skilled in the art should understand that the above embodiments are only for clearly explaining the present disclosure and not for limiting the scope of the present disclosure. For those skilled in the art, other changes or modifications can be made based on the above disclosure, and these changes or modifications are still within the scope of the present disclosure.

Claims

1. A cleaning head of a surface cleaner, characterized in that, Comprising: A housing assembly that defines a receiving chamber, and a relief portion is defined at the rear of the housing assembly, with at least a part of the relief portion located on the bottom surface of the housing assembly; A stirrer disposed within the receiving chamber of the housing assembly and capable of being driven to rotate; A self-driven wheel at least partially disposed within the relief portion and capable of being driven to rotate relative to the housing assembly; And A driven wheel capable of rotating relative to the housing assembly; Wherein, when the stirrer contacts the surface to be cleaned, both the self-driven wheel and the driven wheel contact the surface to be cleaned; when the stirrer disengages from the surface to be cleaned and the bottom surface of the housing assembly forms a first angle with the surface to be cleaned, the self-driven wheel disengages from the surface to be cleaned and the driven wheel contacts the surface to be cleaned.

2. The cleaning head of the surface cleaner according to claim 1, characterized in that, The first angle is an angle greater than or equal to 2.5°.

3. The cleaning head of the surface cleaner according to claim 1, wherein, When the cleaning head is located on the surface to be cleaned, at least a part of the self-driven wheel is within the projection range of the housing assembly on the surface to be cleaned.

4. The cleaning head of the surface cleaner according to claim 3, characterized in that, When the cleaning head is located on the surface to be cleaned, the self-driven wheel is within the projection range of the housing assembly on the surface to be cleaned.

5. The cleaning head of the surface cleaner according to claim 1, wherein, When the cleaning head is located on the surface to be cleaned, the driven wheel straddles the boundary of the projection range of the housing assembly on the surface to be cleaned.

6. The cleaning head of the surface cleaner according to claim 1, characterized in that, When the cleaning head is located on the surface to be cleaned, the self-driven wheel has a first projection on the surface to be cleaned, and the driven wheel has a second projection on the surface to be cleaned, and the first projection is generally closer to the stirrer than the second projection.

7. The cleaning head of the surface cleaner according to claim 1, characterized in that, When the cleaning head is located on the surface to be cleaned, the self-driven wheel has a first projection on the surface to be cleaned, and the driven wheel has a second projection on the surface to be cleaned, and the rear end of the first projection is farther from the stirrer than the rear end of the second projection.

8. The cleaning head of the surface cleaner according to any one of claims 1-7, characterized in that The outer diameter dimension of the self-driven wheel is larger than the outer diameter dimension of the driven wheel; Optionally, the rotation axis of the self-driven wheel is closer to the stirrer than the rotation axis of the driven wheel; Optionally, the driven wheel includes a left driven wheel and a right driven wheel, and the left driven wheel and the right driven wheel are respectively disposed on the left side and the right side of the relief portion of the housing assembly.

9. A surface cleaner, characterized in that, Comprising: A main body portion, A handle portion detachably connected to the main body portion, and the handle portion includes user interaction buttons; A recovery tank fluidly connected to a suction source; A supply tank for storing a cleaning liquid; An electric pump fluidly connected to the supply tank; A cleaning head connected to the main body portion through a connecting portion and enabling the main body portion to pivot relative to the cleaning head as a whole about at least one axis; wherein, the cleaning liquid in the supply tank can be provided to the cleaning head or the surface to be cleaned near the cleaning head through the electric pump; the dirt and cleaning liquid after the cleaning head cleans the surface to be cleaned are collected into the recovery tank; Wherein, the cleaning head is the cleaning head of the surface cleaner according to any one of claims 1-8.

10. The surface cleaner according to claim 9, characterized in that, When an external force is applied to the handle part, the main body part can rotate between the angle in the parallel posture parallel to the surface to be cleaned and the angle in the self-supporting posture, wherein the angle in the parallel posture is 0° to 5°.

Images