Surface cleaning apparatus

Abstract

The utility model relates to surface cleaning equipment which comprises a machine body. The floor brush assembly comprises a mounting structure; a rotating shaft; the coil spring comprises a winding body and a leading-out end; one of the mounting structure and the rotating shaft is connected with the winding body, and the other one is connected with the leading-out end; when the rotating shaft rotates in the first direction to enable the machine body to be in a flat state, the leading-out end is stretched to enable the coil spring to store energy, the coil spring enables the rotating shaft to have the tendency of rotating in the second direction, the first direction is opposite to the second direction, and the pressure of the floor brush assembly on the to-be-cleaned face is larger than or equal to 10 N in the flat state. The lying flat state means that the included angle between the machine body and the to-be-cleaned surface is 0-30 degrees, and the upright state means that the included angle between the machine body and the to-be-cleaned surface is 70-90 degrees. According to the surface cleaning equipment, the coil spring is arranged on the rotating shaft used for rotationally connecting the machine body and the floor brush assembly, in the process that the machine body lies flat, the coil spring assists a user, the burden of the user is relieved, the floor brush assembly cannot be or is not prone to tilting, and the cleaning effect of the surface cleaning equipment can be ensured.

Description

Technical Field

[0001] This utility model relates to the field of cleaning equipment technology, and in particular to a surface cleaning device. Background Technology

[0002] A floor scrubber is a device used for cleaning floors, widely used in homes, commercial spaces, and industrial areas. It combines vacuuming, mopping, and wastewater collection functions, efficiently cleaning hard surfaces such as tile, wood flooring, and marble. A floor scrubber mainly consists of a floor brush, the main body, and a clean water tank, a wastewater tank, and a battery mounted on the body. Its relatively heavy weight results in a greater need for hand-holding force, making it less comfortable for the user.

[0003] Some existing floor scrubbers utilize torsion springs to reduce the hand-holding force required. For example, the floor brush device and cleaning equipment described in patent CN217524979U incorporates a torsion spring within the brush device. One end of the torsion spring presses against the base, and the other end presses against the adapter. The deformed torsion spring provides torque to the machine body, which can offset some of the user's hand weight, thus reducing the hand-holding force required. However, the torsion spring's torque increases as the machine's lying angle increases. Furthermore, due to limitations imposed by the torsion angle and material strength, the torsion spring has a limit. When the machine's lying angle increases to a certain extent, the torsion spring's torque can easily cause the brush to lift, resulting in reduced cleaning efficiency. Utility Model Content

[0004] Based on the aforementioned deficiencies in the existing technology, the purpose of this utility model is to provide a surface cleaning device. A coil spring is configured on the rotating shaft used to rotatably connect the machine body and the floor brush assembly. When the machine body is lying flat, the coil spring can reduce the hand strength required to hold the machine body, assist the user, reduce the user's burden, and prevent or make it difficult for the floor brush assembly to tilt up. The pressure of the floor brush assembly on the surface to be cleaned in the flat state can be ensured to be greater than or equal to 10N, which can ensure the cleaning effect of the surface cleaning device.

[0005] Therefore, the present invention provides the following technical solution.

[0006] This utility model provides a surface cleaning device, the surface cleaning device comprising:

[0007] body;

[0008] A floor brush assembly, including a mounting structure;

[0009] A pivot shaft is used to rotatably connect the body to the floor brush assembly;

[0010] A coil spring includes a coiled body and a lead-out end; one of the mounting structure and the rotating shaft is connected to the coiled body, and the other is connected to the lead-out end;

[0011] When the rotating shaft rotates in the first direction to make the body lie flat, the lead end is stretched to make the coil spring store energy. The coil spring makes the rotating shaft tend to rotate in the second direction. The first direction is opposite to the second direction. The pressure of the floor brush assembly on the surface to be cleaned is greater than or equal to 10N when it lies flat.

[0012] The lying-flat state refers to the angle between the machine body and the surface to be cleaned being 0-30 degrees, and the upright state refers to the angle between the machine body and the surface to be cleaned being 70-90 degrees.

[0013] Surface cleaning equipment is being used more and more frequently in existing technologies, such as floor scrubbers. Floor scrubbers are often used by users who hold one end of the handle and tilt the machine to control the machine to push and pull it forward and backward for targeted cleaning. Due to the special scenario that requires hand-held operation, the weight of the machine is mostly borne by the user, and after a long period of use, the hand will feel very tired.

[0014] To address this, existing technology has designed a solution by placing a torsion spring at the pivot point of the device. This solution uses the elasticity of the torsion spring to offset part of the weight of the device, thereby reducing the force required for the user to hold it.

[0015] However, this leads to a problem: since torsion springs have a limit position, and current floor scrubbers are starting to develop flat-lying technology to clean corners, using the aforementioned torsion spring on this device will cause the floor brush to lift up in the flat-lying state, thus failing to achieve a better cleaning effect.

[0016] This application utilizes a coil spring structure to completely replace the torsion spring. By connecting one end of the coil spring to the rotating shaft and the other end to the floor brush assembly, it not only offsets part of the weight of the machine body but also solves the problem of the floor brush assembly tilting up when lying flat. In other words, the use of the coil spring allows the floor scrubber to not only allow users to use it with less hand force but also ensures that the floor brush exerts downward pressure on the surface to be cleaned when lying flat, thereby ensuring a comprehensive and effective cleaning.

[0017] Optionally, the winding body is rotatably connected to the mounting structure, and the lead-out end is connected to the rotating shaft.

[0018] Optionally, the mounting structure is a shaft hole structure, and the winding body is mounted on the mounting structure via a pay-off wheel.

[0019] Optionally, the connection method between the lead-out end and the rotating shaft includes fastener connection, snap-fit, or latching.

[0020] Optionally, the lead-out end is connected to the rotating shaft by a screw.

[0021] Optionally, the winding body is wound on the rotating shaft, and the lead-out end is connected to the mounting structure.

[0022] Optionally, the starting end of the winding of the winding body is engaged with the rotating shaft.

[0023] Optionally, the number of coil springs is at least two, and the at least two coil springs are located on both sides of the fuselage.

[0024] Optionally, the body is connected to the middle position of the rotating shaft; the coil springs located on both sides of the body are symmetrically arranged about the middle position of the rotating shaft.

[0025] Optionally, the surface cleaning equipment further includes a mounting element, which includes a connected mounting cylinder and the rotating shaft, and the machine body is mounted on the mounting cylinder;

[0026] And / or, the floor brush assembly includes a base and a top cover, the base being connected to the top cover to form a floor brush chamber, the mounting structure being disposed on the base, and the coil spring being housed in the floor brush chamber.

[0027] This utility model has the following technical effects:

[0028] This invention provides a surface cleaning device. A coil spring is mounted on the rotating shaft connecting the main body and the floor brush assembly. When the main body is laid flat, the coil spring extends under the pull of the shaft and stores elastic potential energy. This stored elastic potential energy provides torque to the shaft, thus providing support to the main body, reducing the hand strength required, assisting the user, reducing burden, and improving user experience. Furthermore, the stress distribution during extension is relatively uniform, without a limit state. This prevents or minimizes the risk of the floor brush assembly tilting during the flattening process, ensuring that the pressure applied by the floor brush assembly to the ground remains constant or fluctuates within an acceptable range. The pressure of the floor brush assembly on the surface to be cleaned in the flattened state is guaranteed to be greater than or equal to 10N, ensuring effective cleaning while reducing the hand strength required. Attached Figure Description

[0029] Figure 1 This is a partial exploded view of the surface cleaning device of this utility model;

[0030] Figure 2 This is a schematic diagram of the assembly structure of the base, mounting elements and coil spring of this utility model;

[0031] Figure 3 This is a three-dimensional structural diagram of the base of this utility model;

[0032] Figure 4 This is a three-dimensional structural diagram of the coil spring of this utility model;

[0033] Figure 5 This is a three-dimensional structural diagram of the mounting element of this utility model;

[0034] Figure 6 This is a partial three-dimensional structural diagram of the surface cleaning device of this utility model;

[0035] Figure 7 This is a partial structural side view of the surface cleaning device of this utility model;

[0036] Figure 8 This is a comparison diagram of the hand-held force of the surface cleaning equipment in the experimental group and the control group in one embodiment of this utility model;

[0037] Figure 9 This is a comparison diagram of the ground pressure of the surface cleaning equipment in the experimental group and the control group in one embodiment of this utility model.

[0038] Explanation of reference numerals in the attached figures

[0039] 100. Surface cleaning equipment;

[0040] 1. Floor brush assembly; 11. Base; 111. Mounting structure; 112. Mounting plate; 113. Cavity; 12. Top cover;

[0041] 2. Mounting components; 21. Rotating shaft; 211. First shaft section; 212. Connecting shaft section; 213. Second shaft section; 214. Mounting post; 2141. Second mounting hole; 22. Mounting cylinder;

[0042] 3. Coil spring; 31. Winding body; 32. Lead-out end; 321. First mounting hole;

[0043] 4. Install the shaft. Detailed Implementation

[0044] To make the technical solution and beneficial effects of this utility model more apparent and understandable, a detailed description is provided below by listing specific embodiments. Unless otherwise defined, the technical and scientific terms used herein have the same meanings as those in the technical field to which this application pertains.

[0045] In the description of this utility model, unless otherwise expressly defined, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "height", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description of this utility model and do not indicate that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. That is, they should not be construed as limitations on this utility model.

[0046] In this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating the relative importance of the indicated features or the number of indicated technical features. Therefore, a feature specified as "first" or "second" can explicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two; "several" means at least one; unless otherwise expressly defined.

[0047] In this utility model, unless otherwise explicitly defined, the terms "installation," "connection," "linking," "fixing," and "setting," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral molding; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can also refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0048] In this utility model, unless otherwise explicitly defined, the terms "above," "on top of," "above," "over," "below," "below," "below," or "below" for "first feature above second feature" can refer to direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Furthermore, "above," "above," and "over" for "first feature above second feature" can mean the first feature is directly above or diagonally above the second feature, or simply indicates that the horizontal height of the first feature is higher than the horizontal height of the second feature. Similarly, "below," "below," and "below" for "first feature below second feature" can mean the first feature is directly below or diagonally below the second feature, or simply indicates that the horizontal height of the first feature is lower than the horizontal height of the second feature.

[0049] In this utility model, "front" and "rear" refer to... Figure 1 The markings in the diagram shall prevail; "first direction a" and "second direction b" shall be based on the... Figure 7 The markings in the text shall prevail.

[0050] The following is based on Figures 1 to 9This invention provides a detailed description of the surface cleaning equipment.

[0051] In this embodiment, such as Figure 1 and Figure 2 As shown, the surface cleaning device 100 includes a body (not shown), a floor brush assembly 1, a rotating shaft 21, and a coil spring 3. The floor brush assembly 1 includes a mounting structure 111. The body is rotatably connected to the floor brush assembly 1 via the rotating shaft 21. When the body is lying flat or standing upright, the rotating shaft 21 rotates relative to the floor brush assembly 1. The coil spring 3 includes a winding body 31 and an extension end 32. One of the mounting structure 111 and the rotating shaft 21 is connected to the winding body 31, and the other is connected to the extension end 32.

[0052] like Figure 2 and Figure 7 As shown, when the rotating shaft 21 rotates along the first direction a to make the body lie flat, the lead-out end 32 is stretched, causing the coil spring 3 to store energy (store elastic potential energy). The coil spring 3 applies a force to the rotating shaft 21, thereby causing the rotating shaft 21 to have a tendency to rotate along the second direction b. The first direction a is opposite to the second direction b, and the pressure of the floor brush assembly 1 on the surface to be cleaned in the lying flat state is greater than or equal to 10N. The lying flat state refers to the angle between the body and the surface to be cleaned being 0-30 degrees, and the upright state refers to the angle between the body and the surface to be cleaned being 70-90 degrees.

[0053] Existing surface cleaning equipment, such as floor scrubbers, is used frequently. Users need to hold one end of the handle to move the scrubber. During cleaning, the weight of the machine is mostly borne by the user's hand. After a period of use, users will feel hand fatigue and strain, affecting the user experience. Existing technology addresses this by incorporating a torsion spring at the machine's rotation axis. This solution uses the spring's elasticity to offset some of the machine's weight, reducing the force required from the user's hand. However, the torsion spring has its limits, and current floor scrubbers are increasingly designed to lie flat for corner cleaning. Using the aforementioned torsion spring on this device would significantly reduce the pressure of the floor brush assembly on the floor in the flat position, causing the brush to tilt upwards. This would ultimately prevent the machine from achieving optimal cleaning results in the flat position.

[0054] In this technical solution, a coil spring 3 is configured on the rotating shaft 21 that connects the main body and the floor brush assembly 1. The coil spring completely replaces the torsion spring. During the process of the main body lying flat, the coil spring 3 extends under the pull of the rotating shaft 21 and stores elastic potential energy. At this time, the elastic potential energy stored in the coil spring 3 provides torque to the rotating shaft 21, thereby providing a certain support force to the main body, reducing the hand strength required to hold the main body, assisting the user, reducing the user's burden, and improving the user experience. Furthermore, the stress distribution of the coil spring 3 during the stretching process is relatively uniform, and it does not have a limit state. During the process of the main body lying flat, it will not or is unlikely to cause the floor brush assembly 1 to tilt, thus ensuring that the pressure applied by the floor brush assembly 1 to the ground remains constant or fluctuates within an allowable range. This ensures the cleaning effect of the surface cleaning equipment while reducing the hand strength required to hold the main body. This solution, by configuring a coil spring 3, can not only offset part of the weight of the machine body, but also solve the problem of the floor brush component tilting up when lying flat. In other words, the use of the coil spring 3 allows the surface cleaning device 100 to not only allow users to use lighter hand grips, but also ensures that the floor brush component 1 exerts downward pressure on the surface to be cleaned when lying flat, thereby ensuring a comprehensive and large cleaning effect.

[0055] In one embodiment, the number of coil springs 3 is at least two (not shown in the figure), further reducing the hand-holding force required when the device is lying flat. At least two coil springs 3 are located on both sides of the device to provide assistance from both sides.

[0056] Furthermore, the machine body is connected to the middle position of the rotating shaft 21, which helps the rotating shaft 21 stably support the machine body. The coil springs 3 located on both sides of the machine body are symmetrically arranged about the middle position of the rotating shaft 21. The rotating shaft 21 is subjected to equal forces from the coil springs on both sides of the machine body. In this way, the rotating shaft 21 is subjected to balanced forces, which prevents the machine body from easily deflecting due to uneven forces on the rotating shaft 21 during the rotation of the machine body. The number of coil springs 3 can be two, four, six or even more. Preferably, in order to reduce manufacturing costs and to avoid the machine body being difficult to lie flat due to an excessive number of coil springs 3, the number of coil springs 3 is preferably two.

[0057] In one implementation, such as Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown, the surface cleaning device 100 also includes a mounting element 2, which is mounted on the floor brush assembly 1. The mounting element 2 includes a connected mounting cylinder 22 and a rotating shaft 21, with the main body mounted on the mounting cylinder 22. The mounting element 2 can be a component independent of the floor brush assembly 1 and the main body; it can also be a floor brush head that, together with the floor brush assembly 1, constitutes the surface cleaning device 100; or it can be part of the main body of the device that forms the main body.

[0058] Specifically, such as Figure 1 , Figure 2 and Figure 5 As shown, the rotating shaft 21 includes a first shaft segment 211, a connecting shaft segment 212, and a second shaft segment 213 connected in sequence. The first shaft segment 211 and the second shaft segment 213 are symmetrically arranged about the connecting shaft segment 212. The mounting sleeve 22 is installed on the connecting shaft segment 212. Two coil springs 3 are respectively connected to the first shaft segment 211 and the second shaft segment 213, and the two coil springs 3 are symmetrically arranged about the connecting shaft segment 212 (not shown in the figure).

[0059] In one implementation, such as Figure 1 and Figure 6 As shown, the floor brush assembly 1 includes a base 11 and a top cover 12. The base 11 and the top cover 12 are connected to form a floor brush chamber. The mounting structure 111 is disposed on the base 11, and the coil spring 3 is housed in the floor brush chamber. Of course, the location of the coil spring 3 is not limited to this. The coil spring 3 can also be disposed on the outside of the floor brush assembly 1, and the rotating shaft 21 is at least partially exposed on the outside of the floor brush assembly 1 to facilitate connection with the coil spring 3.

[0060] In this solution, the connection between the coil spring 3, the floor brush assembly 1, and the rotating shaft 21 can be such that the coil body 31 is rotatably connected to the mounting structure 111, and the lead-out end 32 is connected to the rotating shaft 21; or the coil body 31 is connected to the rotating shaft 21, and the lead-out end 32 is connected to the mounting structure 111. For details on these two connection methods, please refer to the first and second embodiments below.

[0061] First Implementation Method

[0062] The following is based on Figures 1 to 5 The surface cleaning device according to the first embodiment of this utility model is described in detail.

[0063] In this embodiment, such as Figure 1 and Figure 2 As shown, the winding body 31 is rotatably connected to the mounting structure 111, and the lead-out end 32 is connected to the rotating shaft 21. When the rotating shaft 21 rotates along the first direction a to make the machine body lie flat, the lead-out end 32 is pulled, the winding body 31 rotates relative to the mounting structure 111, and the coil spring 3 stores elastic potential energy.

[0064] In one implementation, such as Figures 1 to 3As shown, the mounting structure 111 is a shaft hole structure, and the winding body 31 is mounted on the mounting structure 111 via a pay-off wheel (not shown in the figure). Specifically, the base 11 is also provided with two mounting plates 112, which are arranged relatively apart and form a cavity 113 between them, in which the winding body 31 is at least partially located. The mounting structure 111 is provided on the mounting plates 112, and the two ends of the mounting shaft 4 of the pay-off wheel are rotatably connected to the mounting structures 111 of the two mounting plates 112 respectively.

[0065] In one embodiment, the connection between the lead-out end 32 and the rotating shaft 21 includes fastener connection, snap-fit, or latching, which facilitates assembly.

[0066] Furthermore, the lead-out end 32 is connected to the rotating shaft 21 by screws (not shown in the figure), which facilitates easy and secure assembly. Specifically, as shown... Figure 4 and Figure 5 As shown, the lead-out end 32 is provided with a first mounting hole 321, the rotating shaft 21 is provided with a mounting post 214, and the mounting post 214 is provided with a second mounting hole 2141. Figure 2 As shown, when connecting the coil spring 3 to the rotating shaft 21, align the first mounting hole 321 of the coil spring 3 with the second mounting hole 2141 of the mounting post 214, and then tighten it with screws to achieve assembly.

[0067] Second Implementation Method

[0068] In this embodiment, the winding body 31 is wound on the rotating shaft 21, and the lead-out end 32 is connected to the mounting structure 111 (not shown in the figure). The winding body 31 cannot rotate freely, that is, the winding body 31 cannot rotate relative to the rotating shaft 21. When the rotating shaft 21 rotates in the first direction a to make the machine body lie flat, the connection part between the winding body 31 and the rotating shaft 21 rotates with the rotating shaft 21, the lead-out end 32 is pulled, and the coil spring 3 stores the spring potential energy.

[0069] In one embodiment, the starting end of the winding body 31 (not shown in the figure) is fastened to the rotating shaft 21, making assembly convenient. Specifically, the rotating shaft 21 is provided with a snap-fit ​​structure (not shown in the figure), and the starting end of the winding body 31 is configured as a hook structure. The starting end of the winding body and the snap-fit ​​structure are fastened to each other to achieve connection.

[0070] In one embodiment, the connection between the lead-out end 32 and the mounting structure 111 includes fastener (such as screw) connection, snap-fit, or latching.

[0071] Experiment 1: Comparison of ground pressure and hand grip force

[0072] The surface cleaning device 100 in the first embodiment of this application is used as the experimental group, which is equipped with a coil spring 3. The coil spring in the surface cleaning device in the first embodiment is replaced with a torsion spring, and one end of the torsion spring is connected to the base and the other end is connected to the rotating shaft so that the rotating shaft has a tendency to rotate in the second direction b. The surface cleaning device in this group is used as the control group 1.

[0073] The common parameters for the three surface cleaning devices in the experimental group, control group 1, and control group 2 are as follows: the weight of the machine body G1 is 2.2 kg, the weight of the floor brush G2 is 3 kg, the length of the machine body L1 is 1 m, and the total length of the floor brush L4 is 0.235 m.

[0074] In the experimental group, the total torque M of the coil spring 3 was 1.5 N·m, while the spring constant X of the torsion spring in the control group 1 was 0.02408 N·m / rad. The angle between the machine body and the surface to be cleaned was θ, and the larger the lying angle, the smaller θ was.

[0075] The relationship between hand force and ground pressure and angle θ in the experimental group and control group 1 is shown in Table 1.

[0076] Table 1

[0077]

[0078] From Table 1, Figure 8 and Figure 9 It can be known that:

[0079] When the surface cleaning equipment is in an upright position, although the ground pressure of the control group's surface cleaning equipment is higher than that of the experimental group, the ground pressure of the experimental group can be maintained at no less than 11N, ensuring that the surface cleaning equipment has a good cleaning effect when upright. However, the hand-holding force of the control group's equipment in an upright position is as high as 8.3N, while the hand-holding force of the experimental group is 1.04N. The hand-holding force of the control group's equipment is much greater than that of the experimental group. This means that when using the surface cleaning equipment of the control group's equipment, whether upright or lying flat, the user has to bear a greater load, making it difficult to use and not suitable for long-term use.

[0080] As the surface cleaning equipment gradually flattens out, the ground pressure in both the experimental group and control group 1 shows a decreasing trend. The experimental group shows a smaller decrease in ground pressure; at an angle θ of 80 degrees, the ground pressure is 12.06 N, and at an angle θ of 0 degrees, it is 11 N, a decrease of approximately 8%. Furthermore, the ground pressure is not lower than 11 N, indicating that the experimental group maintains a good cleaning effect even when the surface cleaning equipment is flat. In contrast, the ground pressure in control group 1 is 16.33 N at an angle θ of 80 degrees, and 8.25 N at an angle θ of 0 degrees, a decrease of approximately 49%. The decrease in ground pressure is very significant during the flattening process. Moreover, the ground pressure in control group 1 is below 10 N when flattened, indicating that the cleaning effect in control group 1 is less than ideal when the surface cleaning equipment is flat. Furthermore, as the angle θ decreases until the device lies flat, although the hand-holding force in control group 1 gradually decreases, becoming easier for users during the flattening process, the decrease is small, from 8.3N at an angle of 80 degrees to 7.51N at an angle of 0 degrees, a decrease of approximately 9%. This 9% decrease in hand-holding force has adverse consequences, namely, a 49% reduction in ground pressure, significantly sacrificing cleaning effectiveness for a small reduction in hand-holding force. While the hand-holding force in the experimental group tends to increase as the angle θ decreases until the device lies flat, and the flattened state requires slightly more effort than the upright state, the hand-holding force in the experimental group at an angle θ of 0 degrees is only 8.18N, lower than the highest hand-holding force of 8.3N in control group 1. Moreover, for users, the flattened state is used less frequently and for a shorter duration, so the 8.18N hand-holding force will not feel strenuous in a short time. Furthermore, the upright state is used more frequently and for a longer duration, with the hand-holding force below 6N at an angle θ of 70-90 degrees, making it easy and effortless to use.

[0081] In summary, the surface cleaning device 100 of this solution completely replaces the torsion spring with the coil spring 3, making it easier to use in the upright position and reducing the burden in the lying position. The hand-held force of the surface cleaning device 100 is within a reasonable range in any usage state, allowing users to use it easily and providing a better experience. Furthermore, the pressure drop of the floor brush assembly 1 on the cleaning surface is very small when lying down, that is, the setting of the coil spring 3 has little impact on the pressure of the floor brush assembly 2 on the ground, ensuring that the pressure of the floor brush assembly 1 on the cleaning surface is greater than or equal to 10N when lying down.

[0082] It should be understood that in actual products, higher cleaning requirements can be met by adjusting the initial ground pressure of the floor brush component 2 in the experimental group.

[0083] It should be understood that the above embodiments are exemplary and are not intended to encompass all possible implementations included in the claims. Various modifications and changes can be made to the above embodiments without departing from the scope of this disclosure. Similarly, the various technical features of the above embodiments can be arbitrarily combined to form other embodiments of this utility model that may not be explicitly described. Therefore, the above embodiments only illustrate several implementations of this utility model and do not limit the scope of protection of this utility model patent.

Claims

1. A surface cleaning apparatus characterized by, The surface cleaning device (100) comprises: a body; a brush assembly (1) comprising a mounting structure (111); a rotating shaft (21), the body being rotatably connected to the brush assembly (1) through the rotating shaft (21); a coil spring (3) comprising a winding body (31) and a leading end (32); one of the mounting structure (111) and the rotating shaft (21) is connected with the winding body (31), and the other is connected with the leading end (32); wherein, when the rotating shaft (21) rotates in a first direction (a) to make the body in a lying state, the leading end (32) is stretched to store energy in the coil spring (3), the coil spring (3) makes the rotating shaft (21) have a tendency to rotate in a second direction (b), and the first direction (a) is opposite to the second direction (b), and the pressure of the brush assembly (1) on the surface to be cleaned in the lying state is greater than or equal to 10N; the lying state refers to the included angle between the body and the surface to be cleaned being 0-30 degrees, and the upright state refers to the included angle between the body and the surface to be cleaned being 70-90 degrees.

2. The surface cleaning apparatus of claim 1, wherein, The winding body (31) is rotatably connected to the mounting structure (111), and the leading end (32) is connected to the rotating shaft (21).

3. The surface cleaning apparatus of claim 2, wherein, The mounting structure (111) is a shaft hole structure, and the winding body (31) is mounted on the mounting structure (111) through a pay-off wheel.

4. The surface cleaning apparatus of claim 2, wherein, The connection mode of the leading end (32) and the rotating shaft (21) comprises fastener connection or clamping or buckling.

5. The surface cleaning apparatus of claim 4 wherein, The leading end (32) is connected to the rotating shaft (21) by a screw.

6. The surface cleaning apparatus of claim 1, wherein, The winding body (31) is wound on the rotating shaft (21), and the leading end (32) is connected to the mounting structure (111).

7. The surface cleaning apparatus of claim 6, wherein, The winding start end of the winding body (31) is buckled with the rotating shaft (21).

8. The surface cleaning apparatus of any of claims 1-7, wherein, The number of the coil spring (3) is at least two, and at least two coil springs (3) are respectively located on both sides of the body.

9. The surface cleaning apparatus of claim 8, wherein, The body is connected to the middle position of the rotating shaft (21); the coil springs (3) located on both sides of the body are symmetrically arranged about the middle position of the rotating shaft (21).

10. The surface cleaning apparatus of any of claims 1-7, wherein, The surface cleaning device (100) further comprises a mounting element (2), the mounting element (2) comprising a mounting cylinder (22) and the rotating shaft (21) connected thereto, and the body is mounted on the mounting cylinder (22); and / or, the brush assembly (1) comprises a base (11) and an upper cover (12), the base (11) is connected with the upper cover (12) and forms a brush chamber, the mounting structure (111) is arranged on the base (11), and the coil spring (3) is accommodated in the brush chamber.

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