Cleaning head of a surface cleaning device and surface cleaning device

Abstract

The present disclosure provides a cleaning head of a surface cleaning device, comprising a housing; a vacuum suction opening formed in the housing and accessible through a cleaning opening in a bottom of the housing; first and second guide supports spaced apart in a working direction and formed at least within a profile of the housing, wherein the second guide support is detachably secured to the housing by a mounting arm; a flexible cleaning element configured to be guided by the first and second guide supports; the first and second guide supports are configured to be operatively connected and pivotable relative to each other to switch between an unfolded position and a folded position, wherein in the unfolded position the first and second guide supports support the flexible cleaning element with a pre-tightening force, and in the folded position the pre-tightening force is reduced or eliminated. The present disclosure also provides a surface cleaning device.

Description

Technical Field

[0001] This disclosure relates to a cleaning head and a surface cleaning device. Background Technology

[0002] This section provides only background information relevant to this disclosure and is not necessarily prior art.

[0003] Surface cleaning devices are widely used in home and commercial environments to remove debris, dirt, and stains from various surfaces. Some of these devices employ a flexible cleaning element system, in which a continuous flexible cleaning element is driven by a support roller to achieve the cleaning function. The flexible cleaning element maximizes cleaning efficiency by making large-area contact with the floor, achieving efficient cleaning even with low contact pressure, while maintaining a low vertical height, making it suitable for home cleaning applications. The flexible cleaning element is made of reinforced rubber or composite fabric with a surface-bonded microfiber or mixed fiber textile layer to enhance dry and wet cleaning effects. It rotates around front and rear guide devices (such as drive rollers) to collect debris and transfer it to a vacuum system. The support roller's lateral width is at least 90% of the housing width to ensure maximum cleaning area. The flexible cleaning element is supported by front and rear support rollers, one or both of which are driven by a motor to ensure continuous movement and improve debris collection efficiency by maintaining consistent contact with the cleaning surface. Utility Model Content

[0004] This disclosure provides a cleaning head and a surface cleaning device for achieving efficient cleaning and improved maintenance convenience, addressing the challenges of traditional cleaning devices in terms of flexible cleaning element disassembly and operational stability. The cleaning head includes a housing with an internal vacuum suction port accessible through a cleaning opening at the bottom of the housing for effective debris collection. A first guide bracket and a second guide bracket are spaced apart along the working direction within the housing profile, with the second guide bracket detachably fixed to the housing via a mounting arm. A flexible cleaning element (such as a cleaning strip) is guided by the first and second guide brackets, forming a continuous cycle to perform the cleaning task. The first and second guide brackets are pivotally connected and configured to pivot relative to each other, allowing switching between an unfolded and a folded posture. In the unfolded posture, the brackets support the flexible cleaning element with a preload, ensuring stable and continuous cleaning operation. In the folded posture, the preload is reduced or eliminated, facilitating the disassembly and replacement of the flexible cleaning element.

[0005] The pivot connection includes a connecting pin passing through a first connecting hole on the first guide bracket and a second connecting hole on the second guide bracket, wherein at least one connecting hole is a circular hole to ensure the accuracy and stability of the pivoting movement. In the deployed position, the connecting pin is parallel to and above the plane defined by the first pin of the front support roller and the second pin of the drive roller, forming an eccentric configuration that promotes a self-locking effect during operation. The first guide bracket supports the front support roller, which can rotate freely about the first pin, and the second guide bracket supports the drive roller, which can be driven to rotate about the second pin. The flexible cleaning element is detachably wound between the two. The drive roller is typically driven by a motor, providing the main driving force, while the front support roller ensures the precise guidance of the cleaning element.

[0006] The locking mechanism includes a first locking member on the first guide bracket and a second locking member on the second guide bracket, which locks the brackets together in the deployed position, maintaining preload and resisting operational vibrations. The first and second locking members extend laterally along the brackets, forming a pressing locking surface, constituting a mating surface. In some embodiments, the mating surface is inclined at least 10 degrees relative to the surface to be cleaned, enhancing locking stability. The surface cleaning device can be equipped with a handle for manual operation or a self-driving device for autonomous movement, suitable for various cleaning scenarios. This invention provides a robust, user-friendly, and highly maintainable cleaning solution through a compact structural design, a detachable second guide bracket, and a pivot-locking mechanism, significantly superior to existing technologies. This disclosure overcomes the limitations of existing technologies by providing a compact, robust, and easy-to-maintain cleaning solution, significantly improving cleaning efficiency and operational reliability.

[0007] In general, this disclosure includes the following technical solutions:

[0008] A cleaning head for a surface cleaning device, comprising a housing;

[0009] The vacuum suction port is formed inside the housing and is connected to the cleaning port at the bottom of the housing;

[0010] At least a first guide bracket and a second guide bracket are formed in the outline of the housing and spaced apart along the working direction, wherein the second guide bracket is detachably fixed to the housing by a mounting arm;

[0011] A flexible cleaning element is configured to be guided by the first guide bracket and the second guide bracket;

[0012] The first guide bracket and the second guide bracket are configured to be operably connected and pivotable relative to each other, enabling switching between an unfolded posture and a folded posture between the first guide bracket and the second guide bracket. In the unfolded posture, the first guide bracket and the second guide bracket support the flexible cleaning element with a preload force. In the folded posture, the preload force is reduced or disappears.

[0013] According to at least one embodiment of the cleaning head of this disclosure, in the deployed posture, the first guide bracket and the second guide bracket remain locked.

[0014] According to at least one embodiment of the cleaning head of this disclosure, in the folded posture, the first guide bracket and the second guide bracket can swing relative to each other.

[0015] According to at least one embodiment of the present disclosure, the surface cleaning device includes a pivot connection portion, wherein the first guide bracket and the second guide bracket are pivotally connected via the pivot connection portion.

[0016] According to at least one embodiment of the cleaning head of this disclosure, the pivot connection includes at least one first connecting hole on a first guide bracket and at least one second connecting hole on a second guide bracket; and a connecting pin passing through the first connecting hole and the second connecting hole; the first guide bracket and the second guide bracket are connected together through the first connecting hole, the second connecting hole and the connecting pin.

[0017] According to at least one embodiment of the cleaning head of this disclosure, the first guide bracket includes a front support roller that can rotate freely about a first pin on the first guide bracket, and the second guide bracket includes a drive roller that can be driven to rotate about a second pin on the second guide bracket. The flexible cleaning element is detachably wound between the front support roller and the drive roller. In the unfolded position, the connecting pin is parallel to the plane where the first pin and the second pin are located and is located above the plane.

[0018] According to at least one embodiment of the cleaning head of this disclosure, in the unfolded position, the distance from the connecting pin to the plane is no greater than 30 mm.

[0019] According to at least one embodiment of the cleaning head of this disclosure, at least one of the first connecting hole and the second connecting hole is a circular hole.

[0020] According to at least one embodiment of the cleaning head of this disclosure, the surface cleaning device further includes a locking mechanism, wherein in the unfolded position, the first guide bracket and the second guide bracket are locked together by the locking mechanism, and the first guide bracket and the second guide bracket support the flexible cleaning element with a preload.

[0021] According to at least one embodiment of the cleaning head of this disclosure, the locking mechanism includes at least one first locking member located on a first guide bracket and at least one second locking member located on a second guide bracket, the first locking member and the second locking member being configured to lock the first guide bracket and the second guide bracket together in the deployed posture.

[0022] According to at least one embodiment of the cleaning head of this disclosure, a first locking member includes a first locking surface, and a second locking member includes a second locking surface. In the unfolded posture, the first locking surface and the second locking surface press against each other along a portion of the lateral direction of the first guide bracket and the second guide bracket to form a mating surface.

[0023] According to at least one embodiment of the cleaning head of this disclosure, when the surface cleaning device is located on the surface to be cleaned, the plane of the mating surface forms an angle of not less than 10° with the plane of the surface to be cleaned.

[0024] According to another aspect of this disclosure, a surface cleaning device is provided, which includes the cleaning head described above, the surface cleaning device including an operable handle for hand operation by a user; or the surface cleaning device including a self-driving device for automatic movement over the surface to be cleaned. Attached Figure Description

[0025] The accompanying drawings illustrate exemplary embodiments of the present disclosure and, together with the description thereof, serve to explain the principles of the present disclosure. These drawings are included to provide a further understanding of the present disclosure and are incorporated in and constitute a part of this specification.

[0026] Figure 1 This is a perspective view of a handheld vacuum cleaner as an example according to the present disclosure.

[0027] Figure 2 This is a three-dimensional schematic diagram of a self-moving surface cleaning robot according to an example of this disclosure.

[0028] Figure 3 This is a side view of an example surface cleaning apparatus according to the present disclosure.

[0029] Figure 4 This is a three-dimensional schematic diagram of a first guide bracket according to an example of this disclosure.

[0030] Figure 5 This is a three-dimensional schematic diagram of a second guide bracket according to an example of this disclosure.

[0031] Figure 6 This is a side view of a surface cleaning apparatus according to an example of this disclosure, showing the guide bracket in the deployed state.

[0032] Figure 7 This is a side view of an example surface cleaning apparatus according to the present disclosure, with the guide bracket in an extended state, showing the position of the connecting pin in this state.

[0033] Figure 8This is a side view of an example surface cleaning apparatus according to the present disclosure, wherein the guide bracket is in an extended state, showing the angle between the mating surface and the surface to be cleaned.

[0034] Figure 9 This is a side view of a surface cleaning apparatus according to an example of this disclosure, showing the guide bracket in the unlocked state.

[0035] Figure 10 This is a side view of a surface cleaning apparatus according to an example of the present disclosure, showing the guide bracket in a folded state. Detailed Implementation

[0036] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the disclosure. Furthermore, it should be noted that, for ease of description, only the parts relevant to the present disclosure are shown in the accompanying drawings.

[0037] It should be noted that, where there is no conflict, the embodiments and features described in this disclosure can be combined with each other. The disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0038] Unless otherwise stated, the exemplary implementations / embodiments shown are to be understood as providing exemplary features of various details that provide ways in which the technical concepts of this disclosure can be implemented in practice. Therefore, unless otherwise stated, the features of various implementations / embodiments may be additionally combined, separated, interchanged and / or rearranged without departing from the technical concepts of this disclosure.

[0039] The use of crosshairs and / or shading in the accompanying drawings is generally used to clarify the boundaries between adjacent components. Thus, unless otherwise stated, the presence or absence of crosshairs or shading does not convey or indicate any preference or requirement for the specific material, material properties, dimensions, proportions, commonalities between the illustrated components, or any other characteristics, properties, etc., of the components. Furthermore, in the accompanying drawings, the dimensions and relative dimensions of components may be exaggerated for clarity and / or descriptive purposes. When exemplary embodiments can be implemented differently, a specific process sequence may be performed in a different order than that described. For example, two consecutively described processes may be performed substantially simultaneously or in the reverse order of their description. Furthermore, the same reference numerals denote the same components.

[0040] When a component is referred to as being "on" or "above" another component, "connected to," or "joined to" another component, the component may be directly on, directly connected to, or directly joined to the other component, or there may be intermediate components. However, when a component is referred to as being "directly on" another component, "directly connected to," or "directly joined to" another component, there are no intermediate components. Therefore, the term "connection" can refer to a physical connection, an electrical connection, etc., and may or may not have intermediate components.

[0041] For descriptive purposes, this disclosure may use spatial relative terms such as “below,” “under,” “below,” “down,” “above,” “above,” “higher,” and “side (e.g., in a “sidewall”)” to describe the relationship between one component and another component as shown in the accompanying 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 “below” or “under” another component or feature would subsequently be positioned “above” said other component or feature. Thus, the exemplary term “below” can encompass both “above” and “below” orientations. Furthermore, the device may be otherwise positioned (e.g., rotated 90 degrees or in other orientations), thus interpreting the spatial relative descriptive terms used herein accordingly.

[0042] The terminology used herein is for the purpose of describing particular embodiments and is not intended to be limiting. As used herein, unless the context clearly indicates otherwise, the singular forms “a” and “the” are intended to include the plural forms as well. Furthermore, when the terms “comprising” and / or “including” and variations thereof are used in this specification, it indicates the presence of the stated features, integrals, steps, operations, parts, components, and / or groups thereof, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, parts, components, 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 rather than as terms of degree, thus explaining the inherent biases in measurements, calculated values, and / or provided values ​​that would be recognized by one of ordinary skill in the art.

[0043] Flexible cleaning element systems have begun to be applied to handheld vacuum cleaners and autonomous cleaning robots. Key components include the housing, vacuum nozzle, and flexible cleaning element drive mechanism. The housing provides structural integrity, and the vacuum nozzle aligns with the cleaning path of the flexible cleaning element for efficient removal of collected debris. The interaction between the flexible cleaning element and the support roller is crucial, requiring precise tension to maintain stability and prevent slippage or detachment. Recent technological advancements have focused on improving the durability and cleaning effectiveness of flexible cleaning elements, optimizing materials (such as microfiber textile layers, fiber structures that function as mops or rags) to reduce cleaning blind spots, especially at the leading edge of the device, and extending the lifespan of the flexible cleaning element through continuous or intermittent drive, reducing maintenance frequency. The liquid and air permeability of the textile layer enhances wet cleaning effectiveness.

[0044] However, challenges remain regarding the disassembly, operational stability, and cleaning efficiency of flexible cleaning elements. Existing flexible cleaning elements are often non-removable or difficult to disassemble, requiring significant user effort or the use of specialized tools. Current designs typically incorporate an elastomer between front and rear support rollers, adjusting the roller spacing by compressing the elastomer to facilitate the installation or removal of the flexible cleaning element. For example, Chinese patent ZL202221027120.7 discloses a cleaning assembly and cleaning base aimed at improving the cleaning efficiency of wet surface cleaning equipment. This cleaning assembly includes a first rotating shaft, a second rotating shaft, an annular flexible cleaning element, and a support assembly. The first and second rotating shafts are arranged parallel or nearly parallel, and the annular flexible cleaning element circulates around the two rotating shafts. The support assembly is located between the two rotating shafts and includes a deformable portion (such as an elastic element) that allows the two rotating shafts to approach each other for easy installation and removal of the annular flexible cleaning element. This process requires the user to simultaneously compress the elastomer and pull the flexible cleaning element, increasing friction and making operation complex and laborious, leading to cumbersome maintenance or replacement. In addition, the elastomer and its supporting components occupy a large space, resulting in a large unsupported area for the flexible cleaning element between the support rollers, reducing the contact area with the surface and thus reducing cleaning efficiency.

[0045] This invention provides a cleaning head for a surface cleaning device, which solves the aforementioned technical problems by introducing a dynamic guide bracket and a flexible cleaning element. The cleaning head includes a housing with an internal vacuum suction port that communicates with a cleaning port at the bottom of the housing, thereby optimizing suction transmission efficiency. The cleaning head further includes a first guide bracket and a second guide bracket spaced apart along the working direction, which together guide the flexible cleaning element. The second guide bracket is fixed to the housing by a detachable mounting arm for easy assembly and maintenance. The first and second guide brackets are pivotally connected to achieve operable relative movement, allowing the bracket system to switch between an unfolded and folded posture. In the unfolded posture, the brackets support the flexible cleaning element with a preload, ensuring effective contact with the surface; in the folded posture, the preload is reduced or eliminated, facilitating the replacement or storage of the cleaning element. This design, combined with a dynamic bracket configuration, significantly improves the adaptability and ease of operation of the cleaning head.

[0046] like Figure 1 and Figure 2 As shown, the handheld surface cleaning device 1 and the self-moving surface cleaning device 2 both have a housing 100 that can move along the normally horizontal working direction Y. The housing 100 extends along the working direction Y, the lateral direction X, and the vertical direction Z, employing a compact design to maintain a low vertical height, suitable for household cleaning applications, ensuring flexibility and efficiency in various cleaning scenarios. The handheld surface cleaning device includes an operable handle for easy handheld operation; the self-moving surface cleaning device includes a self-driving mechanism that allows the device to move automatically on the surface to be cleaned.

[0047] As is known in the art, housing 100 forms a chamber with a downward-opening, generally rectangular cleaning opening that extends along the transverse X and working Y directions. This cleaning opening serves as the suction port of a vacuum system, directly connected to the cleaning chamber. Vacuuming devices and separators can efficiently collect loose debris and liquid from the flexible cleaning element through this opening. The chamber design supports both dry and wet cleaning operations, and the opening is aligned with the cleaning path of the flexible cleaning element 400, optimizing debris capture efficiency.

[0048] like Figure 3As shown, the housing 100 supports a cleaning element, preferably a flexible cleaning element 400, via a first guide bracket 200 and a second guide bracket 300. The second guide bracket 300 is spaced apart from the first guide bracket 200 in the working direction Y. The flexible cleaning element 400 is guided around the first guide bracket 200 and the second guide bracket 300 and is designed to circulate continuously to ensure continuous cleaning action. The flexibility of the flexible cleaning element 400 allows it to adapt to the floor surface, improving debris collection efficiency. In the deployed position, the first guide bracket 200 and the second guide bracket 300 form an intermediate guide support area, supporting and tensioning the flexible cleaning element 400 to optimize operational stability. The first guide bracket 200 and the second guide bracket 300 are at least partially formed within the contour of the housing 100, ensuring a compact design and structural integrity.

[0049] In some examples, the first guide bracket 200 includes a guide roller 201 mounted within the housing 100 and rotatable about a first axis O1 extending laterally X. The second guide bracket 300 is designed as a drive roller 202 mounted within the housing 100 and rotatable about a second axis O2 extending laterally X and located behind the first axis O1 in the working direction Y. The diameters of the guide roller 201 and drive roller 202 are preferably between 1.5 cm and 6 cm to provide sufficient curvature to prevent excessive bending of the flexible cleaning element and enhance durability. The lateral width of the guide roller 201 and drive roller 202 is at least 90% of the housing width to maximize the cleaning area. In one example, the diameter of the guide roller 201 is designed to be less than or equal to 12 mm to ensure compactness and effectiveness of edge cleaning.

[0050] In some examples, the drive roller 202 can be driven by a drive unit, which can be an electric motor, thereby actuating the flexible cleaning element 400 to circulate endlessly between the drive roller 202 and the guide roller 201. In one example, the motor is configured to drive the drive roller 202 continuously or intermittently to form a power transmission between the flexible cleaning element 400 and the guide roller 201, causing the flexible cleaning element 400 to circulate endlessly between the drive roller 202 and the guide roller 201 to clean the surface to be cleaned in the working state. Continuous operation ensures consistent cleaning results, and the operation causes the flexible cleaning element to advance cyclically between the drive roller 202 and the guide roller 201 by a distance equivalent to the distance between the drive roller 202 and the guide roller 201, ensuring that a new flexible cleaning element segment contacts the floor and optimizing the service life of the flexible cleaning element. The connection between the motor and the drive roller 202 can include a gear or a direct shaft coupling to optimize torque and reduce slippage. The electric motor is driven by a power source housed in the housing 100 in the form of a rechargeable battery and controlled by a controller. Alternatively, energy can be supplied externally, such as through an additional battery pack carrying flexible cleaning elements in the surface cleaning equipment.

[0051] The housing 100 is supported on the surface to be cleaned by a drive roller 202 and a guide roller 201. The relative positioning of the first axis O1 of the guide roller 201 and the second axis O2 of the drive roller 202 brings the flexible cleaning element 400 into contact with the surface. The flexible cleaning element adapts to the floor surface, forming a large contact surface to ensure effective cleaning with minimal pressure and reduce floor wear. The radii of curvature of the drive roller 202 and the guide roller 201 are optimized for the material of the flexible cleaning element to prevent fatigue and extend the life of the flexible cleaning element. The size of the contact surface depends on the width of the flexible cleaning element 400 in the transverse X direction and the distance between the first axis O1 and the second axis O2 in the working Y direction.

[0052] To enhance cleaning effectiveness, both the handheld surface cleaning device 1 and the self-propelled surface cleaning device 2 include a cleaning fluid dispenser stored in a removable reservoir within the housing 100. The dispenser contains a nozzle and a metering pump, spraying cleaning fluid onto the floor-facing side of the flexible cleaning element 400 to enhance the removal of stubborn stains. The liquid permeability of the flexible cleaning element supports wet cleaning, with the liquid distributed through the textile layer for improved cleaning results. A rigid squeegee removes excess liquid and debris from the flexible cleaning element, and the recovery reservoir collects the scraped material, supporting wet cleaning and keeping the flexible cleaning element clean. The nozzle orientation distributes cleaning fluid to the surface of the flexible cleaning element 400, which, with added cleaning fluid, helps loosen dirt particles on the floor, facilitating the removal of stubborn stains.

[0053] In some cases, the first guide bracket 200 and the second guide bracket 300 release the flexible cleaning element 400 by changing their positions relative to each other, allowing for maintenance or replacement of the flexible cleaning element 400 and ensuring cleaning effectiveness and consistency. In some examples, a pivotally connected configuration between the first guide bracket 200 and the second guide bracket 300 brings the drive roller 202 and guide roller 201 closer together, transitioning from an unfolded configuration to a folded configuration. This eliminates tension on the flexible cleaning element and creates a gap between the flexible cleaning element and the drive roller 202 and guide roller 201, facilitating removal. This mechanism simplifies maintenance, reduces downtime, and ensures consistent cleaning performance. The flexible cleaning element is released from the guide roller 201 and drive roller 202 and can then be replaced with a clean one.

[0054] The housing 100, serving as the main body of the cleaning head, is made of reinforced plastic or aluminum to withstand operational pressures such as vibration and impact. It encapsulates all functional components, providing a robust frame with a smooth bottom for gliding. Internally, it integrates a circular vacuum inlet with a diameter of 50-80 mm, accessible through a bottom cleaning opening. This inlet connects to a suction pipe containing a vacuum device and separator, efficiently collecting debris and liquids. The liquid separator supports wet cleaning. The inlet aligns with the cleaning path of the flexible cleaning element 400, optimizing suction and capturing loose debris from the flexible cleaning element, including particles embedded in the textured surface of the element.

[0055] Figure 3 and Figure 6 The first guide bracket 200 and the second guide bracket 300 of the surface cleaning device are shown in their deployed positions, with the flexible cleaning element 400 securely tensioned to achieve cleaning. The tension of the flexible cleaning element is adjusted to its maximum through the pivotal connection between the first guide bracket 200 and the second guide bracket 300 to ensure optimal contact with the floor. The configuration maintains the preload of the flexible cleaning element 400, achieving stable performance and forming a taut, flat cleaning surface, thus enhancing the thoroughness of cleaning.

[0056] like Figure 3 as well as Figure 6-8 In some of the examples shown, the first guide bracket 200 includes a guide roller 201 with a diameter of approximately 12 mm, made of rigid or hard rubber for durability and traction. The diameter optimization balances space constraints and the durability of the flexible cleaning element, ensuring smooth rotation under load. The surface of the guide roller 201 contains a drive profile that matches the texture within the flexible cleaning element, enhancing traction. The guide roller 201 is rotatably mounted on the first guide bracket 200 via a bearing assembly, allowing free rotation about a first axis O1 along the transverse direction X, configured for rotatable drive to support the movement of the flexible cleaning element. The first guide bracket 200 is molded from high-strength plastic and includes a roller mounting portion containing the flexible cleaning element shaft and bearings, ensuring smooth rotation under load.

[0057] In some examples, the second guide bracket 300 includes a drive roller 202. In some instances, the drive roller 202 has a diameter at least four times that of the guide roller 201, thereby enhancing the traction of the flexible cleaning element through its larger diameter, reducing slippage during high-speed operation, and optimizing power transmission. The drive roller 202 is rotatably mounted on the second guide bracket 300. The surface of the drive roller 202 is complementary to the texture of the toothed flexible cleaning element 401, ensuring reliable drive performance. The drive roller 202 rotates about a second axis O2, parallel to O1, and is configured to be driven by a motor via gears or a shaft coupling.

[0058] In some examples, the flexible cleaning element 400 is made of continuous flexible reinforced rubber or composite material and is detachably wound around the guide roller 201 and drive roller 202. Its base material is an elastic plastic (such as synthetic rubber), with fiber reinforcement to maintain dimensional stability. The outer surface of the flexible cleaning element 400 is combined with a microfiber or mixed fiber textile layer to enhance dry and wet cleaning, and its permeability aids liquid and airflow, improving efficiency. The inner surface is textured to enhance the transmission between the guide roller 201 and drive roller 202, while the outer surface is tufted to optimize debris collection. The middle layer of the flexible cleaning element is flexible and envelops the support rollers to form a 120-150° wrap angle, reducing lateral deviation and vibration. The cleaning port of the housing 100 is located below the lower part of the flexible cleaning element and rearward in the Y direction, ensuring that the vacuum suction port effectively captures debris.

[0059] like Figure 3-5 As shown, this disclosure enhances user convenience and operational reliability by enabling the pivoting design of the first guide bracket 200 and the second guide bracket 300 to switch between a folded posture (for removal of the flexible cleaning element) and an unfolded posture (for operation of the flexible cleaning element). The surface cleaning device includes a pivot connection 510 and a locking mechanism 520, supporting pivoting movement and structural locking to ensure efficient cleaning and easy maintenance.

[0060] The surface cleaning device achieves a pivotal connection between the first guide bracket 200 and the second guide bracket 300 via a pivot connection 510. In one example, the pivot connection 510 includes a rigid pin 511 passing through a circular first connection hole 512 in the first guide bracket 200 and a circular second connection hole 513 in the second guide bracket 300. The inner surfaces of the first connection hole 512 and the second connection hole 513 are coated with a low-friction material (such as polytetrafluoroethylene) to ensure smooth rotation of the pin 511, reduce wear, and support precise pivoting.

[0061] In the unfolded position, the axial distance between the first axis O1 and the second axis O2 is maximized. At this time, the first guide bracket 200 and the second guide bracket 300 are in the unfolded position, their relative positions locked, and the flexible cleaning element 400 is supported by a pre-tension force, forming a taut, flat cleaning surface and optimizing the contact area with the floor. In one example, when the first guide bracket 200 and the second guide bracket 300 are in the unfolded position, the pin 511 is eccentrically located above the plane formed by the first axis O1 and the second axis O2. When the flexible cleaning element 400 rotates clockwise, it utilizes tension to generate a self-locking effect, ensuring tension stability and achieving efficient cleaning. Operation in the unfolded position requires ensuring stability; therefore, it is necessary to improve the structural self-locking property to ensure that the first guide bracket 200 and the second guide bracket 300 do not accidentally switch from the unfolded state to the folded state during operation. In one example, as... Figure 7 As shown, the axis of the connecting pin 511 is eccentrically located about 30 mm above the plane containing the first axis O1 and the second axis O2. When the flexible cleaning element 400 rotates clockwise, it uses tension to generate a good self-locking effect, ensuring tension stability and achieving efficient cleaning.

[0062] The surface cleaning device includes a locking mechanism 520, which locks the relative positions of the first guide bracket 200 and the second guide bracket 300 in the deployed state. The locking mechanism includes a first locking element 521 and a second locking element 522, located on the first guide bracket 200 and the second guide bracket 300 respectively, for interlocking. Figure 3 and 4As shown, the first locking member 521 extends at least a portion of the lateral direction of the first guide bracket 200, and the second locking member 522 extends at least a portion of the lateral direction between the second guide brackets 300. In the deployed posture, the first locking member 521 and the second locking member 522 interlock along a portion of the lateral direction of the first guide bracket 200 and the second guide bracket 300.

[0063] In some examples, such as Figure 8 As shown, the first locking member 521 includes a first locking surface, and the second locking member 522 includes a second locking surface. In the unfolded posture, the first locking surface and the second locking surface press against each other along a portion of the lateral direction of the first guide bracket and the second guide bracket to form a mating surface 52.

[0064] To ensure the robustness of the locking mechanism 520, when the surface cleaning device is located on the surface to be cleaned, the plane containing the mating surface forms an angle α of not less than 10° with the plane containing the surface to be cleaned. If the angle α is too small, it is difficult to use the pre-tightening force in the unfolded state to form the contact action of the mating surfaces, which can easily lead to the failure of the locking mechanism 520.

[0065] The first locking member 521 and the second locking member 522 are pressed together by the pre-tightening force of the flexible cleaning element to form a robust interlock. The mating surface 52 has anti-slip protrusions to enhance grip and prevent accidental unlocking during high-intensity cleaning tasks. The pin 511 is eccentrically located about 30 mm above the line of the first axis O1 and the second axis O2. The tension generated when the flexible cleaning element 400 rotates clockwise produces a self-locking effect, enhancing structural stability. The first locking member 521 extends at least a portion of the lateral side of the first guide bracket 200, and the second locking member 522 extends at least a portion of the lateral side of the second guide bracket 300. In the unfolded position, the two interlock along a portion of the lateral side to ensure a secure connection.

[0066] In the deployed position, the guide roller 201 and drive roller 202 are rigidly locked, maintaining maximum axial distance. The tension and rotational traction of the flexible cleaning element 400 balance the supporting forces between the first guide bracket 200 and the second guide bracket 300, achieving static and dynamic balance. The eccentric design of the pin 511 in the deployed state enhances the locking tendency, ensures tension stability, and, combined with a robust structure, supports consistent cleaning performance on various floor types, improving the overall integrity of the equipment.

[0067] The surface cleaning unit ensures the stability and efficient cleaning of the flexible cleaning element 400. An eccentric self-locking design and precise bracket connections enhance reliability, while the compact guide roller 201 and drive roller 202 minimize cleaning blind spots. The pivotable bracket dynamically adjusts tension, supporting deployment and folding posture switching, optimizing cleaning performance and ease of maintenance. This surpasses traditional systems requiring complex tensioning mechanisms, significantly improving user-friendliness.

[0068] Figure 6 , Figure 9 and Figure 10 The surface cleaning device during the folding process is schematically described. By applying a certain external force, the first guide bracket 200 and the second guide bracket 300 rotate relative to each other in opposite directions towards the self-locking direction. By releasing the locking mechanism 520, the pretension of the flexible cleaning element 400 is reduced, facilitating disassembly. The folding process transitions the first guide bracket 200 and the second guide bracket 300 from an unfolded posture to a folded posture, significantly reducing the axial distance between the support rollers, eliminating the pretension of the flexible cleaning element, and creating a gap between the flexible cleaning element and the support rollers, allowing for easy removal.

[0069] Before the flexible cleaning element 400 needs to be disassembled, the pivot connection 510 needs to rotate the first guide bracket 200 relative to the second guide bracket 300 about the pin shaft 511 so that they move closer to each other. Figure 4 and Figure 5 As shown, the first guide bracket 200 has a body 2021, including a first side for mounting the guide roller 201 and a second side containing at least one first shoulder 2022, with a first connecting hole 512 penetrating the first shoulder 2022. The second guide bracket 300 has a body 3021, including a first side for mounting the drive roller 202 and a second side containing at least one second shoulder 3022, with a second connecting hole 513 penetrating the second shoulder 3022. The second sides of the first guide bracket 200 and the second guide bracket 300 are arranged opposite to each other, with the first shoulder 2022 and the second shoulder 3022 staggered and adjacent to form a fit. A pin 511 passes through all the connecting holes to ensure coaxial alignment during rotation. A wear-resistant bushing 5111 is provided on the outer periphery of the pin 511. The detachable support allows for quick replacement of the support roller, enhancing maintenance efficiency.

[0070] To allow the pivot connection 510 to rotate the first guide bracket 200 relative to the second guide bracket 300 around the pin 511, thus bringing them closer together, the locking mechanism 520 must first release the locking of the first locking member 521 and the second locking member 522. Applying an external force can overcome the resistance and friction on the mating surfaces 52 between the first locking member 521 and the second locking member 522, thus disengaging them. Unlocking is initiated manually by external force, releasing the locking members and allowing the brackets to move freely. The residual tension of the flexible cleaning element 400 is converted into the ability to pivot the first guide bracket 200 and the second guide bracket 300, causing the guide roller 201 and the drive roller 202 to come together, preparing for the removal of the flexible cleaning element 400. The operation is simple.

[0071] Figure 10The fully folded configuration displays the guide roller 201 and drive roller 202 with minimal axial distance, eliminating pretension of the flexible cleaning element 400 and allowing for easy removal from the support roller. This folded configuration ensures maximum accessibility and compactness. The outer envelope circumference is reduced by approximately 10-15% compared to the unfolded position.

[0072] The housing 100 encapsulates the vacuum inlet, the first guide bracket 200, the second guide bracket 300, the flexible cleaning element 400, and the surface cleaning device within a compact space, optimizing space efficiency and ensuring that the components work together.

[0073] In its unfolded position, the surface cleaning device features a robust structure. Components such as the housing 100, vacuum suction port, first guide bracket 200, second guide bracket 300, and flexible cleaning element 400 work together to maintain pre-tension, meeting daily floor cleaning needs. This robust structure, supported by the tension of the flexible cleaning element and the stability of the surface cleaning device, ensures consistent performance across various cleaning tasks, minimizing maintenance frequency and enhancing user satisfaction.

[0074] When maintenance or replacement of the flexible cleaning element 400 is required, folding is achieved via the pivot connection 510. The user applies an external force to unlock the locking mechanism 520, causing the first guide bracket 200 to pivot and translate relative to the second guide bracket 300, reducing the preload of the flexible cleaning element 400. The pivot connection 510 causes the bracket to pivot about the pin 511, which slides from the first end 5131 to the second end 5132 within the second connecting hole 513, gradually reducing the center distance between the first axis O1 and the second axis O2, bringing the preload close to zero. The precise movement of the pivot connection reduces wear, and the contours of the inner wall of the housing 100 and the spacious cleaning cavity facilitate access and simplify maintenance.

[0075] In the fully folded state, the distance between the centerlines of the first axis O1 of the first guide bracket 200 and the second axis O2 of the second guide bracket 300 is minimized, and the preload of the flexible cleaning element 400 is completely eliminated, facilitating the removal of the flexible cleaning element 400. In the fully folded state, the outer perimeter of the flexible cleaning element 400 is reduced by approximately 10-15% compared to its unfolded state. The fully folded state ensures maximum accessibility and compactness.

[0076] In some examples, the second guide bracket 300 is detachably secured to the housing 100 via a mounting arm 303. Unlocking the mounting arm 303 allows the second guide bracket 300, along with the first guide bracket 200, to be detached from the housing 100. The mounting arm 303 simplifies disassembly and allows for quick removal of the bracket. After the second guide bracket 300 and the first guide bracket 200 are removed from the housing 100 as a whole, an unlocking and folding operation is performed to further disassemble the flexible cleaning element 400.

[0077] Compared to traditional designs, this disclosure reduces the effort and time required to disassemble flexible cleaning elements. Tool-free disassembly is achieved through a combination of pivoting and translation, overcoming the limitation of traditional flexible cleaning element disassembly designs that require specialized tools, significantly improving the user experience. The tool-free folding process is achieved by a pivotable bracket, simplifying maintenance and making it more convenient for a wider range of users.

[0078] The self-moving surface cleaning robot and its control method according to this disclosure are not limited to the construction and methods of the previously described embodiments, and all or some embodiments may be selectively combined to achieve various modifications.

[0079] In the description of this specification, the references to terms such as "one embodiment / mode," "some embodiments / modes," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment / mode or example is included in at least one embodiment / mode or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment / mode or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments / modes or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments / modes or examples described in this specification, as well as the features of different embodiments / modes or examples.

[0080] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0081] Those skilled in the art should understand that the above embodiments are merely for illustrating the present disclosure and are not intended to limit the scope of the disclosure. Those skilled in the art can make other changes or modifications based on the above disclosure, and these changes or modifications still fall within the scope of the present disclosure.

Claims

1. A cleaning head for a surface cleaning device, characterized in that, Including the outer casing; The vacuum suction port is formed inside the housing and is connected to the cleaning port at the bottom of the housing; At least a first guide bracket and a second guide bracket are formed in the outline of the housing and spaced apart along the working direction, wherein the second guide bracket is detachably fixed to the housing by a mounting arm; A flexible cleaning element is configured to be guided by the first guide bracket and the second guide bracket; The first guide bracket and the second guide bracket are configured to be operably connected and pivotable relative to each other, enabling switching between an unfolded posture and a folded posture between the first guide bracket and the second guide bracket. In the unfolded posture, the first guide bracket and the second guide bracket support the flexible cleaning element with a preload force. In the folded posture, the preload force is reduced or disappears.

2. The cleaning head according to claim 1, characterized in that, In the deployed posture, the first guide bracket and the second guide bracket remain locked.

3. The cleaning head according to claim 1, characterized in that, In the folded posture, the first guide bracket and the second guide bracket can swing relative to each other.

4. The cleaning head according to claim 1, characterized in that, The surface cleaning device includes a pivot connection, through which the first guide bracket and the second guide bracket are pivotally connected.

5. The cleaning head according to claim 4, characterized in that, The pivot connection includes at least one first connection hole on the first guide bracket and at least one second connection hole on the second guide bracket; and a connecting pin passing through the first connection hole and the second connection hole; The first guide bracket and the second guide bracket are connected together through the first connecting hole, the second connecting hole, and the connecting pin.

6. The cleaning head according to claim 5, characterized in that, The first guide bracket includes a front support roller that can rotate freely about a first pin on the first guide bracket, and the second guide bracket includes a drive roller that can be driven to rotate about a second pin on the second guide bracket. The flexible cleaning element is detachably wound between the front support roller and the drive roller. In the unfolded position, the connecting pin is parallel to the plane where the first pin and the second pin are located, and is located above the plane.

7. The cleaning head according to claim 6, characterized in that, In the unfolded position, the distance from the connecting pin to the plane is no greater than 30mm.

8. The cleaning head according to claim 6, characterized in that, At least one of the first connecting hole and the second connecting hole is a round hole.

9. The cleaning head according to claim 6, characterized in that, The surface cleaning device also includes a locking mechanism. In the unfolded position, the first guide bracket and the second guide bracket are locked together by the locking mechanism, and the first guide bracket and the second guide bracket support the flexible cleaning element with a pre-tightening force.

10. The cleaning head according to claim 9, characterized in that, The locking mechanism includes at least one first locking member located on the first guide bracket and at least one second locking member located on the second guide bracket, wherein the first locking member and the second locking member are configured to lock the first guide bracket and the second guide bracket together in the deployed posture.

11. The cleaning head according to claim 10, characterized in that, The first locking member includes a first locking surface, and the second locking member includes a second locking surface. In the unfolded posture, the first locking surface and the second locking surface press against each other along a portion of the lateral direction of the first guide bracket and the second guide bracket to form a mating surface.

12. The cleaning head according to claim 11, characterized in that, When the surface cleaning device is located on the surface to be cleaned, the plane containing the mating surface forms an angle of not less than 10° with the plane containing the surface to be cleaned.

13. A surface cleaning device, characterized in that, The surface cleaning device includes a cleaning head as described in any one of claims 1-12, and includes an operable handle for hand operation by a user; or the surface cleaning device includes a self-driving device for automatic movement over the surface to be cleaned.

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