Roller type surface cleaning device

Abstract

The present application provides a roller surface cleaning device, comprising a pivotally connected cleaning head and a handle, the cleaning head having a front cleaning roller and a rear cleaning roller that rotate in opposite directions, the handle having a first swing angle range and a second swing angle range in the front-to-back direction relative to the cleaning head, the handle moving forward in the first swing angle range, and moving backward in the second swing angle range. The roller surface cleaning device of the present application can move forward or backward according to the range of rotation of the handle, so that the user can more conveniently use the surface cleaning device to reciprocate and wipe the surface to be cleaned.

Description

Technical Field

[0001] The present application belongs to the technical field of cleaning equipment, and specifically provides a roller-type surface cleaning device. Background Art

[0002] As people's living standards improve, various surface cleaning devices have gradually entered people's daily lives. One type of surface cleaning device is a roller surface cleaning device, which has two cleaning rollers. The rotating cleaning rollers can mop the surface to be cleaned. In addition, the two cleaning rollers are arranged in parallel along the front-to-back direction of the roller surface cleaning device, so that the same surface to be cleaned is mopped in sequence as the roller surface cleaning device moves forward.

[0003] However, when the existing roller-type surface cleaning device is used to reciprocate and wipe a certain surface to be cleaned, the user needs to push and pull the roller-type surface cleaning device back and forth, which makes the user laborious. Moreover, when cleaning the bottom of low furniture such as sofas or cabinets, the user needs to apply a large pulling force to pull the roller-type surface cleaning device out from the bottom of the furniture, which makes the user easily feel tired. Summary of the invention

[0004] In order to solve the above-mentioned problems in the prior art, that is, to enable users to save more effort when using a roller surface cleaning device, the present application provides a roller surface cleaning device, including a pivotally connected cleaning head and a handle bar, the cleaning head having a front cleaning roller and a rear cleaning roller turning in opposite directions, the handle bar having a first swing angle range and a second swing angle range in the front-to-rear direction relative to the cleaning head, when the handle bar is in the first swing angle range, the cleaning head moves forward; when the handle bar is in the second swing angle range, the cleaning head moves backward.

[0005] Optionally, the front cleaning roller rotates forward and the rear cleaning roller rotates backward; the handlebar is swung within the first swing angle range so that the gripping force of the front cleaning roller is greater than the gripping force of the rear cleaning roller; the handlebar is swung within the second swing angle range so that the gripping force of the front cleaning roller is less than the gripping force of the rear cleaning roller.

[0006] Optionally, the angle between the handlebar when it swings within the aforementioned first swing angle range and the horizontal plane is greater than the angle between the handlebar when it swings within the aforementioned second swing angle range and the horizontal plane.

[0007] Optionally, the first swing angle range is greater than the second swing angle range.

[0008] Optionally, the pivot axis for the handle to swing along the front-to-back direction of the cleaning head is located between the front cleaning roller and the rear cleaning roller, and the distance between the pivot axis and the front cleaning roller is greater than the distance between the pivot axis and the rear cleaning roller.

[0009] Optionally, the roller surface cleaning device further comprises a communicatively connected controller and an angle detection sensor, wherein the angle detection sensor is used to detect the swing angle of the handle relative to the cleaning head in the front-rear direction, and the controller is used to control the cleaning head to move forward or backward.

[0010] Optionally, the controller controls the cleaning head to move forward or backward by controlling the rotation speed and / or rotation direction of the front cleaning roller and the rear cleaning roller.

[0011] Optionally, the first swing angle ranges from 45° to 85°, and the second swing angle ranges from 5° to 40°; and / or,

[0012] The front cleaning roller and the rear cleaning roller are wiping members each having a twisted thread; and / or,

[0013] The front cleaning roller and the rear cleaning roller have the same size; and / or,

[0014] The roller surface cleaning device further comprises a liquid supply assembly, and the liquid supply assembly is used to provide cleaning liquid to the front cleaning roller.

[0015] Optionally, the front cleaning roller and the rear cleaning roller both include a rotating roller body and a cleaning unit that is tightly fitted on the outer surface of the rotating roller body and wraps the rotating roller body, the rotating cleaning unit adheres to the floor to be cleaned and deforms, so that the cleaning unit forms a friction cleaning surface, the friction cleaning surface extends from one end of the cleaning unit to the other end, and the width of the friction cleaning surface is 0.5 cm to 5 cm.

[0016] Optionally, an offset first motor is provided in the front cleaning roller, an offset second motor is provided in the rear cleaning roller, and one end of the front cleaning roller close to the first motor and one end of the rear cleaning roller away from the second motor are located on the same side of the cleaning head so that the center of gravity of the cleaning head approaches the mid-vertical plane of the cleaning head perpendicular to the axial direction of the front cleaning roller.

[0017] It can be understood by those skilled in the art that the roller surface cleaning device described above in the present application has at least the following beneficial effects:

[0018] By configuring the handlebar with a first swing angle range and a second swing angle range, and making the cleaning head move forward when the handlebar is within the first swing angle range, and moving the cleaning head backward when the handlebar is within the second swing angle range, the user can control the forward and backward movement of the roller surface cleaning device by moving the handlebar within the first swing angle range or the second swing angle range, without having to apply excessive thrust or pull force to the handlebar, thereby making the user's cleaning work more labor-saving and improving the user experience. In addition, when it is necessary to reciprocate and wipe a certain surface to be cleaned, the user can stand or sit in place and move his arms as the roller surface cleaning device moves, and the roller surface cleaning device can achieve reciprocating movement according to the position of the handlebar, which is more friendly to users with limited mobility.

[0019] Furthermore, when it is necessary to clean the bottom of furniture such as sofas or cabinets, although the user needs to apply a pushing force to overcome the driving force of the rear cleaning roller, there is no need to apply a pulling force when the roller surface cleaning device withdraws from the bottom of the furniture. The roller surface cleaning device can withdraw from the bottom of the furniture under the drive of the rear cleaning roller. Since it is easier for the user to apply a pushing force to the roller surface cleaning device, the cleaning work on the bottom of the furniture is more in line with user habits. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Some embodiments of the present application are described below with reference to the accompanying drawings, in which:

[0021] Figure 1 is a schematic structural diagram of a roller surface cleaning device in a first embodiment of the present application;

[0022] Figure 2 is an exploded schematic diagram of the cleaning head in the first embodiment of the present application;

[0023] Figure 3 is a schematic structural diagram of the front cleaning roller in the first embodiment of the present application;

[0024] Figure 4 is a schematic diagram of a first swing angle range and a second swing angle range in a first embodiment of the present application;

[0025] Figure 5 is a schematic diagram of a first swing angle range, a second swing angle range, and a third swing angle range in the first embodiment of the present application;

[0026] Figure 6 is a schematic diagram of a state of the surface of the front cleaning roller in the second embodiment of the present application;

[0027] Figure 7 is a schematic diagram of another state of the surface of the front cleaning roller in the second embodiment of the present application;

[0028] Figure 8It is a schematic diagram of the surface of the rear cleaning roller in the second embodiment of the present application.

[0029] Description of reference numerals:

[0030] 11. Handle bar; 12. Cleaning head; 13. Front cleaning roller; 131. Front rotating roller body; 132. Front cleaning unit; 14. Rear cleaning roller; 15. Clean water tank; 16. First motor; 17. Second motor; 18. Pivot shaft; 19. Twisting thread. DETAILED DESCRIPTION

[0031] It should be understood by those skilled in the art that the embodiments described below are only part of the embodiments of the present application, rather than all of the embodiments of the present application, and the embodiments are intended to explain the technical principles of the present application, and are not intended to limit the protection scope of the present application. Based on the embodiments provided in the present application, all other embodiments obtained by ordinary technicians in the field without creative work should still fall within the protection scope of the present application.

[0032] It should be noted that, in the description of this application, the terms "center", "upper", "lower", "top", "bottom", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are merely for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0033] In addition, it should be noted that in the description of this application, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0034] The roller floor cleaning device of the present application includes a pivotally connected cleaning head and a handlebar, the cleaning head having a front cleaning roller and a rear cleaning roller that turn in opposite directions, the handlebar having a first swing angle range and a second swing angle range in the front-to-rear direction relative to the cleaning head, when the handlebar is in the first swing angle range, the cleaning head moves forward, and when the handlebar is in the second swing angle range, the cleaning head moves backward.

[0035] The roller type floor cleaning device of the present application configures a first swing angle range and a second swing angle range for the handle, and enables the cleaning head to move forward when the handle is within the first swing angle range, and the cleaning head to move backward when the handle is within the second swing angle range, so that the user can control the forward and backward movement of the roller type surface cleaning device by moving the handle within the first swing angle range or the second swing angle range, without applying excessive thrust or pulling force to the handle, thereby making the user's cleaning work more labor-saving and improving the user experience. In addition, when it is necessary to reciprocate and wipe a certain surface to be cleaned, the user can stand or sit in place and move his arms as the roller type surface cleaning device moves, and the roller type surface cleaning device can achieve reciprocating movement according to the position of the handle, which is more friendly to users with limited mobility.

[0036] Furthermore, when it is necessary to clean the bottom of furniture such as sofas or cabinets, although the user needs to apply a pushing force to overcome the driving force of the rear cleaning roller, there is no need to apply a pulling force when the roller surface cleaning device withdraws from the bottom of the furniture. The roller surface cleaning device can withdraw from the bottom of the furniture under the drive of the rear cleaning roller. Since it is easier for the user to apply a pushing force to the roller surface cleaning device, the cleaning work on the bottom of the furniture is more in line with user habits.

[0037] The specific structure of the roller floor cleaning device of the present application will be described below with reference to the accompanying drawings.

[0038] The first embodiment of the present application:

[0039] like Figure 1 As shown, the roller surface cleaning device of this embodiment includes a handle 11, a cleaning head 12, a front cleaning roller 13, a rear cleaning roller 14 and a liquid supply assembly (not shown in the figure). The handle 11 and the cleaning head 12 are pivotally connected, and the user uses the roller surface cleaning device by holding the handle 11. The front cleaning roller 13 and the rear cleaning roller 14 are arranged at the bottom of the cleaning head 12 to contact the surface to be cleaned, and the front cleaning roller 13 and the rear cleaning roller 14 are arranged side by side in the front and rear directions of the cleaning head 12. The liquid supply assembly includes a clean water tank 15, a liquid supply pipe (not shown in the figure) and a water pump (not shown in the figure), and the water pump can transport the cleaning liquid in the clean water tank 15 to the front cleaning roller 13 through the liquid supply pipe. A first motor 16 is provided inside the front cleaning roller 13, and a second motor 17 is provided inside the rear cleaning roller 14. During the operation of the roller surface cleaning device, the front cleaning roller 13 and the rear cleaning roller 14 are driven by the first motor 16 and the second motor 17 to rotate and mop the surface to be cleaned.

[0040] like Figure 2As shown, the front cleaning roller 13 and the rear cleaning roller 14 are both provided with a hollow cavity (the schematic area surrounded by the dotted line in the figure), and the first motor 16 and the second motor 17 can be respectively accommodated in the hollow cavities of the front cleaning roller 13 and the rear cleaning roller 14, so as to be offset in the front cleaning roller 13 and the rear cleaning roller 14, so that the front cleaning roller 13 and the rear cleaning roller 14 both have an end close to the motor and an end away from the motor. The first motor 16 and the second motor 17 are respectively installed on the left and right sides of the cleaning head 12, that is, the end of the front cleaning roller 13 close to the first motor 16 and the end of the rear cleaning roller 14 away from the second motor 17 are located on the same side of the cleaning head 12.

[0041] It is understood by those skilled in the art that, since the motor accounts for a large proportion of the weight of the entire cleaning head 12, by installing the motors offset in the front cleaning roller 13 and the rear cleaning roller 14 on the left and right sides of the cleaning head 12 respectively, the overall gravity of the cleaning head 12 is more evenly distributed in the left and right directions, and the center of gravity of the cleaning head 12 is close to its own mid-vertical plane perpendicular to the axial direction of the front cleaning roller 13 (and the rear cleaning roller 14), thereby making the pressure on the cleaning roller 12 in the axial direction more uniform, and the cleaning effect on the surface to be cleaned is more balanced, thereby improving the overall cleaning effect of the surface cleaning device. At the same time, the balanced gravity allows the surface cleaning device to move more smoothly during the cleaning process, avoiding some users from feeling uncomfortable due to the gravity of the entire machine being biased to one side. In addition, there is no need to set up an additional counterweight to balance the overall gravity of the cleaning head 12, which reduces costs and reduces the weight of the entire machine.

[0042] The ratio of the axial length of the first motor 16 to the axial length of the front cleaning roller 13 preferably ranges from 1 / 2 to 3 / 4, and correspondingly, the ratio of the axial length of the second motor 17 to the axial length of the rear cleaning roller 14 is also set.

[0043] Furthermore, the front cleaning roller 13 and the rear cleaning roller 14 each include a rotating roller body and a cleaning unit tightly fitted on the outer surface of the rotating roller body. Figure 3 As shown, taking the front cleaning roller 13 as an example, the front cleaning roller 13 includes a front rotating roller body 131 and a front cleaning unit 132 tightly fitted on the outer surface of the front rotating roller body 131 and wrapping the front rotating roller body 131. During the cleaning work of the roller surface cleaning device of this embodiment, the front cleaning unit 132 is deformed by the pressure and the external force from the user, thereby forming a friction cleaning surface in contact with the ground, and the friction cleaning surface extends from one end of the front cleaning unit 132 to the other end. Specifically, the width of the friction cleaning surface 213 (such as Figure 3 The rear cleaning roller 14 has the same structure as the front cleaning roller 13, which will not be described in detail here.

[0044] like Figure 4As shown, the handle 11 has a first swing angle range a and a second swing angle range b in the front-to-back direction relative to the cleaning head 12, the angle between the handle 11 in the first swing angle range a and the horizontal plane is greater than the angle between the handle 11 in the second swing angle range b and the horizontal plane, and the first swing angle range a is greater than the second swing angle range b.

[0045] Combination Figure 1 and Figure 4 As shown, when the handle 11 is located in the first swing angle range a, the cleaning head 12 has a tendency to move forward, and when the handle 12 is located in the second swing angle range b, the cleaning head 12 has a tendency to move backward. Specifically, the front cleaning roller 13 rotates forward ( Figure 1 The front cleaning roller 13 rotates counterclockwise), and the rear cleaning roller 14 rotates backward ( Figure 1 The front cleaning roller 13 and the rear cleaning roller 14 rotate clockwise), the structural properties such as materials and dimensions of the front cleaning roller 13 and the rear cleaning roller 14 are exactly the same. Therefore, in the absence of external factors, the friction between the front cleaning roller 13, the rear cleaning roller 14 and the surface to be cleaned is the same, or the front cleaning roller 13 and the rear cleaning roller 14 have the same grip.

[0046] Firstly, since the liquid supply component provides cleaning liquid to the front cleaning roller 13, not only does the front cleaning roller 13 become heavier due to absorbing water and the pressure on the surface to be cleaned increases, but also the adsorption force between the front cleaning roller 13 and the surface to be cleaned is strengthened after being wet (for example, a towel is not easy to drag after being wet), thereby enhancing the grip of the front cleaning roller 13. In other words, the friction between the front cleaning roller 13 and the surface to be cleaned is increased.

[0047] Secondly, the pivot shaft 18 connecting the handle 11 and the cleaning head 12 is located between the front cleaning roller 13 and the rear cleaning roller 14, and the distance between the pivot shaft 18 and the front cleaning roller 13 is greater than the distance between the pivot shaft 18 and the rear cleaning roller 14, so that the weight of the handle 11 mainly acts on the rear cleaning roller 14, increasing the pressure of the rear cleaning roller 14 on the ground, and then increasing the friction between the rear cleaning roller 14 and the surface to be cleaned.

[0048] When the handle 11 is in the second swing angle range b, the force of the weight of the handle 11 distributed to the rear cleaning roller 14 is relatively large, exceeding the effect of the front cleaning roller 13 being wet, so that the grip of the rear cleaning roller 14 is stronger, that is, the friction between the rear cleaning roller 14 and the surface to be cleaned is greater than the friction between the front cleaning roller 13 and the surface to be cleaned, so that the force driving the cleaning head 12 to move backward is greater, and the cleaning head 12 moves backward when the user does not apply excessive external resistance to the handle 11. When the handle 11 rotates from the second swing angle range b to the first swing angle range a, the force of the weight of the handle 11 distributed to the rear cleaning roller 14 gradually decreases, and the force distributed to the front cleaning roller 13 gradually increases. When the handle 11 is in the first swing angle range a, although the gravity of the handle 11 is distributed more on the rear cleaning roller 14, due to the front cleaning roller 13 being wet, and the force of the gravity of the handle 11 distributed on the front cleaning roller 13, exceeds the effect of the handle 11 on the rear cleaning roller 14, making the front cleaning roller 13 have a stronger grip, that is, the friction between the front cleaning roller 13 and the surface to be cleaned is greater than the friction between the rear cleaning roller 14 and the surface to be cleaned, so that the cleaning head 12 is subjected to a greater force driving it to move forward, and the cleaning head 12 moves forward when the user does not apply excessive external resistance to the handle 11.

[0049] It should be noted that the weight of the handlebar 11 can be obtained by arranging the liquid supply assembly on the handlebar 11 or by adding an external counterweight structure.

[0050] In addition, it should be noted that the material or size of the front cleaning roller 13 and the rear cleaning roller 14 can also be changed (for example, the weight of the rotating roller body of the front cleaning roller 13 and the rear cleaning roller 14 is set to be different or the material of the cleaning unit of the front cleaning roller 13 and the rear cleaning roller 14 is set to be different, etc.), so that the weight of the front cleaning roller 13 is greater than the weight of the rear cleaning roller 14 or the friction coefficient between the front cleaning roller 13 and the surface to be cleaned is greater than the friction coefficient between the rear cleaning roller 14 and the surface to be cleaned is greater than the rear cleaning roller 14, and the front cleaning roller 13 can have a stronger grip when the handle 11 is in the first swing angle range a, and the rear cleaning roller 14 can have a stronger grip when the handle 11 is in the second swing angle range b. In the case where the material or size of the front cleaning roller 13 and the rear cleaning roller 14 are different, a liquid supply component may be provided, or a liquid supply component may not be provided.

[0051] In addition, it is also necessary to explain that the front cleaning roller 13 can be rotated backward and the rear cleaning roller 14 can be rotated forward, so that when the grip of the rear cleaning roller 14 is stronger than that of the front cleaning roller 13, the roller surface cleaning device moves forward, and when the grip of the front cleaning roller 13 is stronger than that of the rear cleaning roller 14, the roller surface cleaning device moves backward.

[0052] like Figure 5 As shown, in a preferred implementation of this embodiment, the handle 11 has a third swing angle range c in the front-to-back direction, and the third swing angle range c is between the first swing angle range a and the second swing angle range b. When the handle 11 is in the third swing angle range c, the front cleaning roller 13 and the rear cleaning roller 14 have the same gripping force, and the roller surface cleaning device maintains the current position of the surface to be cleaned without the user applying excessive external force. Among them, the first swing angle range a is equal to the sum of the second swing angle range b and the third swing angle range c (can be approximately equal).

[0053] Reference Figure 5 As shown, in one embodiment, the first swing angle range a is from the position where the angle between the handlebar 11 and the horizontal plane is 45 degrees to the position where the angle between the handlebar 11 and the horizontal plane is 85 degrees, the second swing angle range b is from the position where the angle between the handlebar 11 and the horizontal plane is 5 degrees to the position where the angle between the handlebar 11 and the horizontal plane is 40 degrees, and the third swing angle range c is from the position where the angle between the handlebar 11 and the horizontal plane is 40 degrees to the position where the angle between the handlebar 11 and the horizontal plane is 45 degrees.

[0054] Reference Figures 1 to 4As shown, during the use of the roller surface cleaning device of this embodiment, first, the user can keep the handle 11 within the first swing angle range a, so that the roller surface cleaning device moves forward driven by the front cleaning roller 13, and the user does not need to provide excessive thrust, which makes the user more labor-saving. Then, when the user needs to mop a certain surface to be cleaned back and forth, the user can move the arm to make the handle 11 reciprocate between the first swing angle range a and the second swing angle range b. During this period, the user can stand or sit in place. When the handle 11 is in the first swing angle range a, the roller surface cleaning device moves forward, and the user lowers his arm as the roller surface cleaning device moves forward, and the angle between the handle 11 and the horizontal plane gradually decreases. Then, the handle 12 is rotated to the second swing angle range b, and the roller surface cleaning device starts to move backward. The user raises his arm as the roller surface cleaning device moves backward, and the angle between the handle 11 and the horizontal plane gradually increases, so that the handle 11 is rotated to the first swing angle range a again. As the handle 11 reciprocates between the first swing angle range a and the second swing angle range b, the roller surface cleaning device can mop a certain surface to be cleaned back and forth. When the user needs to clean the bottom of furniture such as sofas or cabinets, the handle 11 of the roller surface cleaning device needs to be lowered to a very low level, that is, within the second swing angle range b. The roller surface cleaning device has a tendency to move backward, so that the user needs to apply a relatively large thrust to the handle 11 to move the roller surface cleaning device forward under the furniture. When the roller surface cleaning device needs to move backward, the user only needs to loosen the handle 11 without applying any pulling force, and the roller surface cleaning device can move backward under the drive of the rear cleaning roller 14.

[0055] Those skilled in the art can understand that the roller surface cleaning device of this embodiment configures the handle 11 with a first swing angle range a and a second swing angle range b, and enables the cleaning head 12 to move forward when the handle 11 is within the first swing angle range a, and to move backward when the handle 11 is within the second swing angle range b, so that the user can control the forward and backward movement of the roller surface cleaning device by moving the handle 11 within the first swing angle range a or the second swing angle range b by moving the arm, without applying excessive thrust or pulling force to the handle 11, thereby making the user's cleaning work more labor-saving and improving the user experience. In addition, when it is necessary to reciprocate and wipe a certain surface to be cleaned, the user can stand or sit in place and move his arms as the roller surface cleaning device moves, and the roller surface cleaning device can achieve reciprocating movement according to the position of the handle 11, which is more friendly to users with limited mobility.

[0056] Furthermore, when it is necessary to clean the bottom of furniture such as sofas or cabinets, although the user needs to apply a thrust to overcome the driving force of the rear cleaning roller 14, there is no need to apply a pulling force when the roller surface cleaning device withdraws from the bottom of the furniture. The roller surface cleaning device can withdraw from the bottom of the furniture under the drive of the rear cleaning roller 14. Since it is easier for the user to apply a thrust to the roller surface cleaning device, the cleaning work on the bottom of the furniture is more in line with user habits.

[0057] The second embodiment of the present application:

[0058] Reference Figure 6 As shown in FIG. 1 , in this embodiment, the surfaces of the front cleaning roller 13 and the rear cleaning roller 14 have twisted threads 19, i.e., protrusions similar to fluff. The friction between the cleaning roller and the surface to be cleaned is different according to the different states of the twisted threads 19. Specifically, as the pressure on the original twisted threads 19 increases, the deformed twisted threads 19 will increase the roughness of the surface of the cleaning roller (e.g., the roughness of the surface of the cleaning roller is increased by the twisted threads 19). Figure 6 Change to Figure 7 When the pressure on the twisted wire 19 exceeds a certain limit value, the twisted wire 19 is compressed to a certain extent, so that the twisted wire 19 forms a smooth surface together. When the pressure is greater than the limit value, the smooth surface formed by the twisted wire 19 becomes smoother, and then the friction between the cleaning roller and the surface to be cleaned becomes smaller. When the twisted wire 19 is compressed to a certain extent (as shown in the state shown in the state shown in the state shown in the state), the friction between the cleaning roller and the surface to be cleaned becomes larger and larger. When the pressure on the twisted wire 19 exceeds a certain limit value, the twisted wire 19 is compressed to a certain extent (as shown in the state ... Figure 8 As shown in the figure, the friction between the cleaning roller and the surface to be cleaned no longer changes significantly with the increase or decrease of pressure.

[0059] Reference Figures 6 to 8 As shown, since the force of gravity distribution of the handle 11 on the rear cleaning roller 14 is relatively large, the twisted wire 19 on the surface of the rear cleaning roller 14 is compressed to Figure 8 The state shown in FIG. 1 (the friction between the rear cleaning roller 14 and the surface to be cleaned does not change significantly with the increase or decrease of pressure). When the handle 11 is in the second swing angle range b, the pressure on the front cleaning roller 13 is small, and the twisted thread 19 of the front cleaning roller 13 is in Figure 6In the state shown, the friction between the front cleaning roller 13 and the surface to be cleaned is also small and smaller than the friction between the rear cleaning roller 14 and the surface to be cleaned, so that the cleaning head 12 is subjected to a greater force to drive it backward. When the handle 11 is rotated from the second swing angle range b to the first swing angle range a, the force distributed to the rear cleaning roller 14 by the gravity of the handle 11 gradually decreases, and the force distributed to the front cleaning roller 13 gradually increases. However, the friction between the rear cleaning roller 14 and the surface to be cleaned does not change substantially, while the twisted wire 19 on the surface of the front cleaning roller 13 changes significantly with the pressure change, so that the friction between the front cleaning roller 13 and the surface to be cleaned increases faster. When the handle 11 is in the first swing angle range a, the friction between the front cleaning roller 13 and the surface to be cleaned is greater than the friction between the rear cleaning roller 14 and the surface to be cleaned, so that the cleaning head 12 is subjected to a greater force to drive it forward. As the handle 11 reciprocates between the first swing angle range a and the second swing angle range b, the roller surface cleaning device can reciprocate and wipe a certain surface to be cleaned.

[0060] The third embodiment of the present application:

[0061] Although not shown in the figures, in this embodiment, the roller surface cleaning device is provided with a controller and an angle detection sensor which are communicatively connected. The angle detection sensor can detect the swing angle of the handle relative to the cleaning head in the front-to-back direction. The controller then receives the signal from the angle sensing detector. When the handle is in a first swing angle range, the controller controls the front cleaning roller and the rear cleaning roller to rotate forward. When the handle is in a second swing angle range, the controller controls the front cleaning roller and the rear cleaning roller to rotate backward. In this way, the cleaning head is controlled to move forward or backward according to the swing angle range of the handle.

[0062] It can be understood that in another possible mode of this embodiment, when the handle is in a first swing angle range, the controller controls the rotation speed of the front cleaning roller to be greater than the rotation speed of the rear cleaning roller so that the cleaning head moves forward; when the handle is in a second swing angle range, the controller controls the rotation speed of the front cleaning roller to be less than the rotation speed of the rear cleaning roller so that the cleaning head moves backward, thereby realizing controlling the cleaning head to move forward or backward according to the swing angle range of the handle.

[0063] So far, the technical solution of the present application has been described in combination with the above multiple embodiments, but it is easy for those skilled in the art to understand that the protection scope of the present application is not limited to these specific embodiments. Without departing from the technical principles of the present application, those skilled in the art can split and combine the technical solutions in the above-mentioned various embodiments, and can also make equivalent changes or replacements to the relevant technical features. Any changes, equivalent replacements, improvements, etc. made within the technical concept and / or technical principles of the present application will fall within the protection scope of the present application.

Claims

1. A roller surface cleaning device, comprising a pivotally connected cleaning head and a handle, wherein the cleaning head has a front cleaning roller and a rear cleaning roller that rotate in opposite directions, characterized in that: The front cleaning roller rotates forward, and the rear cleaning roller rotates backward, and in the absence of external influences, the friction between the front cleaning roller, the rear cleaning roller and the surface to be cleaned is the same, and the handle has a first swing angle range and a second swing angle range in the front-to-back direction relative to the cleaning head, and when the handle is in the first swing angle range, the handle weight allocated to the front cleaning roller is greater than the weight allocated to the rear cleaning roller, so that the gripping force of the front cleaning roller is greater than the gripping force of the rear cleaning roller, driving the cleaning head to move forward; when the handle is in the second swing angle range, the handle weight allocated to the front cleaning roller is less than the weight allocated to the rear cleaning roller, so that the gripping force of the front cleaning roller is less than the gripping force of the rear cleaning roller, driving the cleaning head to move backward.

2. The roller surface cleaning device according to claim 1, characterized in that: The angle between the handlebar when it swings within the first swing angle range and the horizontal plane is greater than the angle between the handlebar when it swings within the second swing angle range and the horizontal plane.

3. The roller surface cleaning device according to claim 1, characterized in that: The first swing angle range is greater than the second swing angle range.

4. The roller surface cleaning device according to any one of claims 1 to 3, characterized in that: The pivot axis for the handle to swing along the front-rear direction of the cleaning head is located between the front cleaning roller and the rear cleaning roller, and the distance between the pivot axis and the front cleaning roller is greater than the distance between the pivot axis and the rear cleaning roller.

5. The roller surface cleaning device according to any one of claims 1 to 3, characterized in that: The first swing angle ranges from 45° to 85°, and the second swing angle ranges from 5° to 40°; and / or, The front cleaning roller and the rear cleaning roller are wiping members respectively having twisted threads; and / or, The front cleaning roller and the rear cleaning roller have the same size; and / or, The roller surface cleaning device further comprises a liquid supply assembly, and the liquid supply assembly is used for providing cleaning liquid to the front cleaning roller.

6. The roller surface cleaning device according to any one of claims 1 to 3, characterized in that: The front cleaning roller and the rear cleaning roller both include a rotating roller body and a cleaning unit that fits tightly on the outer surface of the rotating roller body and wraps the rotating roller body. The rotating cleaning unit adheres to the floor to be cleaned and deforms, thereby forming a friction cleaning surface for the cleaning unit. The friction cleaning surface extends from one end of the cleaning unit to the other end, and the width of the friction cleaning surface is 0.5 cm to 5 cm.

7. The roller surface cleaning device according to any one of claims 1 to 3, characterized in that: An offset first motor is provided in the front cleaning roller, and an offset second motor is provided in the rear cleaning roller. An end of the front cleaning roller close to the first motor and an end of the rear cleaning roller away from the second motor are located on the same side of the cleaning head so that the center of gravity of the cleaning head approaches the mid-vertical plane of the cleaning head perpendicular to the axial direction of the front cleaning roller.

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