Cleaning head and cleaning equipment

Abstract

The invention provides a cleaning head and cleaning equipment, and belongs to the field of cleaning equipment. The cleaning head comprises a main body part and a plurality of flexible pipes, and the main body part is used for being connected with a negative pressure source and forming a flow channel used for being communicated with the negative pressure source; the near end of the flexible pipe is connected with the main body part and is communicated with the flow channel, and a suction port for sucking particulate matters is formed in the far end of the flexible pipe. The transverse size of the suction port of any flexible pipe is smaller than the transverse size of an internal channel of the flexible pipe; the main body part is provided with a pressure relief hole communicated with the flow channel, and the pressure relief hole is closer to the negative pressure source relative to the flexible pipe in the airflow direction, pointing to the negative pressure source, of the suction opening. According to the cleaning head and the electric equipment, a narrow area can be touched, and the probability that small objects are sucked into an air path by mistake is reduced; and meanwhile, the pressure relief hole is formed, so that an air supply and pressure relief channel can be provided for the air path when the suction port is blocked or the through-flow is limited.

Description

TECHNICAL FIELD

[0001] The present disclosure belongs to the technical field of cleaning equipment, and particularly relates to a cleaning head and a cleaning equipment. BACKGROUND

[0002] As a commonly used negative pressure cleaning equipment, a dust collector usually forms suction at the suction inlet through a negative pressure source to suck and transport particulate matters such as dust and debris from a to-be-cleaned area to a dust collection structure. In order to adapt to different cleaning positions and surface morphologies, the existing dust collector is often matched with multiple cleaning heads or suction nozzle accessories, such as a long flat suction head, a soft brush head, and a two-in-one long flat suction and soft brush structure.

[0003] The above cleaning head can play a certain role in the conventional cleaning of the ground, table top or relatively open area, but in the scene where dust and small items are mixed in the tool box, drawer and the like, the existing technology still has a prominent insufficient adaptability, which limits the reliability and efficiency of the cleaning process. SUMMARY

[0004] When cleaning the inside of the tool box and drawer, dust usually coexists with small items such as screws, gaskets and parts, and the items have various morphologies and different sizes. In the cleaning process, it is necessary to avoid unintended impact on the items as much as possible while ensuring the cleaning effect. However, the suction inlet opening of the traditional long flat suction head is large, and under the action of negative pressure, the above-mentioned small items and dust are easily sucked together, causing the items to be lost or mixed into the dust collection structure, thereby increasing the workload of subsequent screening and counting and reducing the use convenience. For scenes where the number of parts is large or the value is high, the above-mentioned suction error may also cause additional management costs and risks.

[0005] At the same time, although the soft brush head can move or sweep dust through the contact of the bristles, dust may still be re-deposited or spread in the local area during the brushing and sweeping process, and the soft brush structure is more inclined to disturb particulate matters rather than directly suck and remove particulate matters in many cases, thereby causing the cleaning process to need to repeatedly switch between brushing and sweeping and sucking and removing, and the overall steps are relatively cumbersome.

[0006] In addition, the inside of the tool box and drawer and the edge area thereof usually have narrow corners such as door and window joints, drawer corners, chair seat joints and the like, which have small space scales, many obstructions and complex boundaries. Although the two-in-one long flat suction and soft brush structure attempts to consider different functions on one accessory, in actual use, the user still generally needs to manually switch the working mode according to the cleaning position, and the long flat suction is often limited by the shape and attitude adjustment of the suction inlet when entering the narrow gap, and it is difficult to stably fit the inside boundary of the gap. The soft brush may also have a situation that the brushing and sweeping can be reached but the suction inlet cannot effectively follow, resulting in low cleaning efficiency of the narrow area.

[0007] Based on the above analysis, the purpose of this disclosure is to provide a cleaning head and cleaning device that can be adapted to complex cleaning scenarios with small items and narrow areas.

[0008] To achieve the above objectives, the technical solution provided in this disclosure is as follows:

[0009] Firstly, this disclosure provides a cleaning head comprising a main body and a plurality of flexible tubes. The main body is used to connect to a negative pressure source and forms a flow channel for communicating with the negative pressure source. The proximal end of each flexible tube is connected to the main body and communicates with the flow channel, while the distal end of each flexible tube forms a suction port for inhaling particulate matter. Specifically, for any of the flexible tubes, the lateral dimension of its suction port is smaller than the lateral dimension of the internal channel of the flexible tube. The main body is provided with a pressure relief hole communicating with the flow channel, and the pressure relief hole is closer to the negative pressure source relative to the flexible tube in the airflow direction along the suction port towards the negative pressure source. By setting the flexible tubes to reach narrow areas, cleaning capability is improved. By limiting the lateral dimension of the suction port, objects entering the suction path are constrained at the suction port, thereby reducing the probability of accidental inhalation in mixed-item scenarios and making potential blockages more likely to occur at the suction port end rather than deep within the internal channel, facilitating cleaning and maintenance. Simultaneously, by setting a pressure relief hole closer to the negative pressure source in the main body, the negative pressure in the air path is buffered under conditions such as suction port obstruction, reducing adsorption jamming and stabilizing suction output.

[0010] In one or more embodiments, the pressure relief hole is connected to the external atmosphere to introduce outside air into the flow channel when the suction port is at least partially blocked. The pressure relief hole's connection to the external atmosphere allows outside air to be introduced into the flow channel when the suction port is at least partially blocked, thereby suppressing negative pressure peaks, mitigating suction port adhesion and adsorption phenomena, and reducing suction fluctuations and the probability of jamming.

[0011] In one or more embodiments, the flexible tube has a constricted section at the end near the suction port, such that the minimum cross-sectional area of ​​the suction port is smaller than the minimum cross-sectional area of ​​the internal channel of the flexible tube. By forming a constricted section at the suction port end, the interception and selective entry at the inlet are further enhanced, making it more difficult for large particles to enter the internal channel, reducing the risk of deep blockage, and improving the cleanability of exposed blockages.

[0012] In one or more embodiments, the lateral dimension of the suction port is between 1 and 2 mm; and / or the length of the flexible tube is between 10 and 80 mm. By limiting the lateral dimension of the suction port, a more suitable balance is achieved between suppressing aspiration and ensuring unobstructed suction, making it difficult for larger items such as screws and parts to be sucked in while allowing dust and fine debris to pass through; by limiting the length of the flexible tube, the ability to penetrate and cover narrow dead angles is improved, while avoiding insufficient contact due to excessively short length or increased curling and pressure loss due to excessively long length, which would affect suction stability.

[0013] In one or more embodiments, a plurality of the flexible tubes are arranged in an array to form a brushing structure, and the distal end faces of the plurality of flexible tubes together define a distal plane. The array of flexible tubes forming the brushing structure improves the ability to adhere to and reach narrow areas such as door and window seams and crevices, and enables multi-point suction inlet distribution to improve the efficiency of nearby suction; the distal end faces forming a distal plane make the contact boundary between brushing and suction more consistent, reducing blind spots in localized cleaning and improving operational stability.

[0014] In one or more embodiments, the angle between the distal plane and the horizontal plane is 30-60° to accommodate tilted cleaning postures. By limiting the angle between the distal plane and the horizontal plane to 30-60°, the cleaning head is better adapted to tilted cleaning postures, improving gap-feeding ability and edge-fitting performance, reducing the probability of the suction port being completely obstructed by the flat surface, and reducing the frequency of hand posture adjustments, thereby improving cleaning efficiency and comfort in narrow areas.

[0015] In one or more embodiments, the proximal end faces of the plurality of flexible tubes collectively define a proximal plane, which is parallel to the distal plane, and all the flexible tubes are of equal length. By making the proximal plane parallel to the distal plane and the flexible tubes of equal length, the internal channel lengths of each flexible tube are made consistent, resulting in more consistent pressure drop along the suction path. This improves the uniformity of flow distribution within the array, enhances the consistency of suction power at each nozzle, and reduces regional differences in cleaning effectiveness.

[0016] In one or more embodiments, a plurality of pressure relief holes are provided on opposite sides of the outer peripheral wall of the main body, and the plurality of pressure relief holes in the opposite sides are arranged at intervals along a direction parallel to the proximal plane. Grouping and arranging the pressure relief holes in opposite sides of the outer peripheral wall of the main body enhances the redundancy and attitude adaptability of pressure relief and air replenishment, reduces the probability of pressure relief failure due to unilateral obstruction or dust accumulation, and makes air replenishment more balanced, thereby further stabilizing the airflow state and suction output.

[0017] In one or more embodiments, the flexibility of the flexible tube varies gradient along its axial direction, and / or the wall thickness of the flexible tube varies gradient along its axial direction, such that the distal flexibility of the flexible tube is greater than the proximal flexibility. By making the distal flexibility greater than the proximal flexibility, the ability to penetrate gaps, fit edges and corners, and reach with a brush is balanced with the proximal resistance to curling, collapse, and structural stability at the joint.

[0018] In one or more embodiments, the distal outer edge of the flexible tube is provided with a chamfered and / or rounded corner structure. Providing a chamfered and / or rounded corner structure at the distal outer edge of the flexible tube can reduce the probability of large particles adhering and obstructing the suction port edge.

[0019] In one or more embodiments, the cleaning head further includes an interface portion for connecting to a pipe of a negative pressure source. The interface portion includes a snap-fit ​​structure adapted to the pipe of the negative pressure source. The interface portion is detachably connected to the pipe of the negative pressure source via the snap-fit ​​structure, and the main body portion is connected to the interface portion. The detachable connection to the pipe is achieved through the interface portion and its snap-fit ​​structure, improving the convenience of cleaning head replacement and maintenance.

[0020] In one or more embodiments, the main body and the flexible tube are made of at least one of thermoplastic elastomer, thermoplastic polyurethane, polyvinyl chloride, and silicone rubber. By limiting the main body and the flexible tube to at least one of thermoplastic elastomer, thermoplastic polyurethane, polyvinyl chloride, and silicone rubber, the elasticity and fatigue resistance of the components are improved, and the contact adaptability and fracture resistance in narrow areas are enhanced.

[0021] Secondly, this disclosure provides a cleaning device including a main unit for providing negative pressure and the aforementioned cleaning head, wherein the main unit is connected to the cleaning head via a connecting pipe. Integrating the cleaning head into the cleaning device enables the negative pressure provided by the main unit to be transmitted to the cleaning head via the connecting pipe, thereby achieving overall cleaning capability output and enabling the aforementioned selective suction inlet entry, pressure relief stabilization, and array brushing effects to be realized in the overall usage scenario.

[0022] The cleaning head and electric device disclosed herein feature a flexible tube on the cleaning head that can reach narrow areas and a limited suction port size. This restricts the suction of objects at the suction port, thereby reducing the probability of small objects being accidentally sucked into the air path in mixed-item scenarios. Simultaneously, due to the limited suction port and relatively larger internal channels, larger particles are more likely to be intercepted at the suction port end, and blockages are more exposed, facilitating quick cleaning by the user. Furthermore, by providing a pressure relief hole, the air path can be supplied with air and pressure relief when the suction port is blocked or flow is restricted, suppressing abnormal increases in negative pressure and reducing jamming and suction fluctuations. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments recorded in this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the cleaning head in one embodiment of the present disclosure;

[0025] Figure 2 This is a partial structural cross-sectional view of the cleaning head in one embodiment of this disclosure;

[0026] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0027] Figure 4 This is a partial structural diagram of the cleaning head in one embodiment of the present disclosure.

[0028] Explanation of key figure labels:

[0029] 1-Main body, 11-Flow channel, 12-Pressure relief hole, 2-Flexible tube, 21-Suction port, 22-Internal channel, 23-Contraction section, 31-Far end plane, 32-Proximal end plane, 4-Interface part, 41-Snap-fit ​​structure. Detailed Implementation

[0030] To enable those skilled in the art to better understand the technical solutions in this disclosure, the technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this disclosure.

[0031] Unless otherwise expressly stated, throughout the specification and claims, the term "comprising" or its variations such as "including" or "comprises" shall be understood to include the stated elements or components without excluding other elements or other components.

[0032] It should be noted that when an element is described as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. In the embodiments shown in this disclosure, directional representations such as up, down, left, right, front, and back are relative and are used to explain the relative structure and movement of different components in this disclosure. These representations are appropriate when the components are in the positions shown in the figures. However, if the description of the component positions changes, then these representations are considered to change accordingly.

[0033] In daily cleaning, vacuum cleaner attachments are often designed for relatively simple objects to be cleaned. However, in complex cleaning scenarios where toolboxes, drawers, and other items are mixed together, the inventors observed that the objects to be cleaned exhibit significantly different characteristics. Dust coexists with various small items, and the space is narrow, the boundaries are complex, and there are many dead corners.

[0034] Based on the analysis of such scenarios, the inventors further discovered that the reason why existing cleaning attachments frequently result in poor user experience is not simply due to insufficient suction or brushing ability, but rather a structural mismatch between their working mechanism and the needs of the scenario. On the one hand, an overly open suction inlet, under negative pressure, can cause an uncontrollable tendency to suck in mixed small items, leading to a chain reaction of problems such as accidental suction and subsequent sorting. On the other hand, relying on the separation of brushing and suction, or on manual switching between different modes, makes the cleaning process in narrow gaps and complex corners lengthy and inefficient, and it is difficult to form a stable and sustainable cleaning action in confined spaces.

[0035] Based on the above understanding, the technical approach of this disclosure starts from the essence of cleaning behavior. By forming a selective entry mechanism for particulate matter at the inhalation end, the objects entering the airway are restricted, thereby transforming the risk of aspiration from a problem dependent on human attention into a controllable problem constrained by the structure itself. In addition, a buffering and regulating mechanism for negative pressure and airflow is constructed in the airway, so that even when the inhalation is blocked, adhered to, or flow is restricted, the stability of the airway can still be maintained and the tendency of adsorption, stagnation, and aspiration caused by extreme negative pressure can be suppressed, thereby improving the continuous operation capability and reliability in complex scenarios.

[0036] Based on the above mechanism, this disclosure further adopts a contact and entry approach for narrow dead angles: that is, to enable the cleaning end to have higher spatial accessibility and boundary fitting ability, so that it can enter narrow areas such as door and window gaps, drawer corners, etc., and to remove dust immediately upon reaching them, thereby avoiding the cumbersome process of disturbing and then vacuuming or changing heads and then cleaning in the traditional method.

[0037] Thus, this disclosure forms a holistic improvement path, which, through the constraint of the inhaled object, the adjustment of the airflow state, and the systematic improvement of the accessibility of narrow spaces, enables the cleaning head to reduce the risk of accidental inhalation and improve the efficiency and stability of the cleaning process in scenarios where items are mixed and narrow dead corners coexist.

[0038] Please refer to Figures 1 to 3 As shown, a cleaning head in one embodiment of this disclosure includes a main body 1 and a plurality of flexible tubes 2. The main body 1 is used to connect to a negative pressure source and forms a flow channel 11 for communicating with the negative pressure source. The proximal end of the flexible tube 2 is connected to the main body 1 and communicates with the flow channel 11, and the distal end of the flexible tube 2 forms a suction port 21 for inhaling particulate matter. For any flexible tube 2, the lateral dimension of its suction port 21 is smaller than the lateral dimension of the internal channel 22 of the flexible tube 2. The main body 1 is provided with a pressure relief hole 12 communicating with the flow channel 11, and the pressure relief hole 12 is closer to the negative pressure source relative to the flexible tube 2 in the airflow direction along the suction port 21 towards the negative pressure source.

[0039] The main body 1 is configured as a support structure for connection with a negative pressure source. A through flow channel 11 is formed within the main body 1. During operation, the flow channel 11 is used to communicate with the negative pressure source, so that the negative pressure generated by the negative pressure source can be transmitted to the suction end area of ​​the cleaning head via the flow channel 11. The main body 1 may have a connection end for connecting a pipe or interface assembly. The connection end is connected to the flow channel 11, so that a stable air passage is formed between the negative pressure source and the cleaning head.

[0040] Multiple flexible tubes 2 are connected to the main body 1 in parallel. The proximal end of the flexible tube 2 is connected to the main body 1 and communicates with the flow channel 11, so that the flow channel 11 of the main body 1 can distribute negative pressure to each flexible tube 2. The distal end of the flexible tube 2 is away from the main body 1 and faces the area to be cleaned, forming a suction port 21 for sucking up particulate matter. Here, the proximal end can be understood as the end of the flexible tube 2 close to the main body 1. This end is connected to the main body 1 by insertion, overmolding, bonding, integral molding or other fixing methods, and a sealed or semi-sealed communication structure is formed at the connection to ensure that the negative pressure can effectively act on the internal channel 22 of the flexible tube 2. The distal end can be understood as the end of the flexible tube 2 away from the main body 1 and exposed to the external environment. During cleaning operations, the distal end is used to approach or contact the surface, gap or corner of the area to be cleaned to perform the suction action and collect particulate matter.

[0041] Each flexible tube 2 has an internal channel 22 for conveying airflow and particulate matter. The internal channel 22 is enclosed by the wall of the flexible tube 2 and extends along the axial direction of the flexible tube 2. The internal channel 22 is connected to the flow channel 11 of the main body 1 at the proximal end and to the suction port 21 at the distal end, thereby forming a continuous suction path between the suction port 21, the internal channel 22, the flow channel 11 of the main body 1 and the negative pressure source.

[0042] To selectively restrict objects entering the air passage, for any flexible tube 2, the lateral dimension of the suction port 21 is smaller than the lateral dimension of the internal channel 22 of the flexible tube 2. Here, "lateral" refers to the direction relative to the axial direction of the flexible tube 2, and the lateral dimension is used to characterize the dimensional parameters of the opening or channel within the cross-section perpendicular to the axial direction of the flexible tube 2. By making the lateral dimension of the suction port 21 smaller than the lateral dimension of the internal channel 22, the flexible tube 2 forms a channel structure with a restricted inlet and a relatively open interior at the distal end. This makes it difficult for larger items or particles to enter the internal channel 22 of the flexible tube 2 through the suction port 21, thereby reducing the probability of accidental inhalation in scenarios involving mixed items such as toolboxes and drawers, and making the particles entering the air passage more likely to be fine particles such as dust and small debris that can pass through the suction port 21.

[0043] The limited lateral dimensions of the suction port 21 also improve the clogging pattern and ease of maintenance. During cleaning, there may be large debris, soft foreign objects, or irregular particles approaching the suction port 21. The smaller lateral dimensions of the suction port 21 make it easier for these foreign objects to be directly blocked or stuck at the suction port 21. The blockage location is closer to the far end of the flexible tube 2 and is in the exposed area. Users can quickly remove the blockage by external cleaning, shaking, or simple wiping, preventing foreign objects from entering the deep internal channel 22 of the flexible tube 2 and causing internal blockage.

[0044] Compared to blockages occurring in the middle of the internal channel 22 or near the confluence of the main body 1, blockages at the suction port 21 are easier to observe and handle, thus reducing maintenance costs. Simultaneously, due to the relatively large lateral dimension of the internal channel 22, when fine particles enter through the suction port 21, the internal channel 22 provides a more ample transport cross-section, which helps reduce the probability of particles bridging or accumulating inside the pipe, further improving the unobstructed flow of air.

[0045] To further improve the airflow under abnormal operating conditions, the main body 1 is provided with a pressure relief hole 12 that communicates with the flow channel 11. The pressure relief hole 12 is closer to the negative pressure source than the flexible tube 2 in the airflow direction along the suction port 21 towards the negative pressure source. That is, the pressure relief hole 12 is located in the air passage section of the main body 1 between the flexible tube 2 and the negative pressure source, so that the pressure relief hole 12 can provide a replenishment air passage between the flow channel 11 in the main body 1 and the external environment.

[0046] When the suction port 21 is blocked by particulate matter, adheres to the surface to be cleaned, or has limited flow due to narrow gaps, the negative pressure inside the main body 1 may increase, leading to enhanced adsorption and increased jamming at the suction port 21 end. The pressure relief hole 12 can introduce outside air under the above circumstances, reduce the peak negative pressure inside the main body 1, mitigate the adsorption effect at the suction port 21 end, thereby improving the stability of the air path and reducing the risk of accidental aspiration caused by instantaneously high negative pressure.

[0047] The pressure relief hole 12 and the lateral dimension design of the suction port 21 work together to geometrically restrict the objects entering the airway through the lateral dimension relationship of the suction port 21, and adjust the airway state through the pressure relief hole 12. This allows the cleaning head to take into account suction safety, unobstructed flow and maintainability in scenarios where there is a mixture of items and narrow areas, thereby improving the overall cleaning efficiency and reliability of use.

[0048] In one exemplary embodiment, please refer to Figure 1 and Figure 4 As shown, the pressure relief hole 12 is connected to the external atmosphere to introduce outside air into the flow channel 11 when the suction port 21 is at least partially blocked.

[0049] The pressure relief hole 12 structurally forms a communication channel between the internal flow channel 11 of the main body 1 and the external environment. This allows the main body 1, when connected to a negative pressure source and in operation, to exchange gases with the atmospheric environment through the pressure relief hole 12, in addition to the intake path formed by the flexible tube 2. The pressure relief hole 12's connection to the external atmospheric environment can be understood as forming a through-hole on the wall of the main body 1, communicating with the outside air, thus forming a supplementary air path. The flow channel 11 within the main body 1 maintains communication with the pressure relief hole 12, allowing outside air at the pressure relief hole 12 to enter the flow channel 11 under negative pressure and flow towards the negative pressure source side along the airflow direction.

[0050] When the suction port 21 is at least partially blocked, the effective flow area of ​​the flexible tube 2 decreases, the air intake provided by the flexible tube 2 to the inner flow channel 11 of the main body 1 decreases, the negative pressure level of the inner flow channel 11 of the main body 1 increases relatively, and may cause phenomena such as enhanced adsorption at the suction port 21 end, airflow pulsation, or momentary jamming. The design of the pressure relief hole 12 to connect to the external atmospheric environment allows for the provision of a replenishment air passage in the flow channel 11 of the main body 1 that connects to the atmospheric environment. This ensures that the air system can still obtain a stable air intake source when the flow through the suction port 21 is restricted, thereby suppressing the abnormal increase in negative pressure caused by partial blockage and maintaining the airflow continuity of the inner flow channel 11 of the main body 1.

[0051] When the suction port 21 is at least partially blocked, the pressure relief hole 12 can introduce outside air into the flow channel 11 under negative pressure. After the outside air enters the flow channel 11 through the pressure relief hole 12, it can compensate for the insufficient air intake on the side of the suction port 21 of the flexible tube 2, so that the overall flow rate of the flow channel 11 in the main body 1 will not drop suddenly, thereby avoiding significant fluctuations in suction output. On the other hand, it can reduce the negative pressure peak of the flow channel 11 in the main body 1, mitigate the adsorption effect of the suction port 21 end on the surface to be cleaned or foreign objects, make it easier for the suction port 21 end to recover from the attached or blocked state, reduce the duration of jamming and reduce the risk of accidental suction.

[0052] Furthermore, the introduction of outside air through the pressure relief hole 12 can improve the clogging pattern during particulate matter transport to a certain extent. When the suction port 21 is partially blocked, causing airflow concentration, particulate matter may accumulate or adhere near the suction port 21. Introducing outside air through the pressure relief hole 12 can reduce the extreme negative pressure and local high-speed airflow at the suction port 21, alleviate the strong adsorption state of particulate matter at the suction port 21, and make the particulate matter more likely to stay in the exposed area and be easier to clean. This complements the relatively small lateral dimension of the suction port 21 and further improves maintenance convenience.

[0053] In one exemplary embodiment, please refer to Figure 2 and Figure 3As shown, the flexible tube 2 has a contraction section 23 at the end near the suction port 21, so that the minimum cross-sectional area of ​​the suction port 21 is smaller than the minimum cross-sectional area of ​​the internal channel 22 of the flexible tube 2.

[0054] To ensure that the suction port 21 retains its suction function while selectively restricting the entry of particulate matter, the flexible tube 2 has a constriction section 23 at its end near the suction port 21. The constriction section 23 is arranged along the axial direction of the flexible tube 2 and is located between the suction port 21 and the internal channel 22 of the flexible tube 2. This allows the flexible tube 2 to gradually or stepwise transition from a relatively large internal channel 22 to a smaller opening near the suction port 21, thereby structurally creating a flow path with a restricted inlet and a relatively open interior.

[0055] By setting the contraction section 23, the minimum cross-sectional area of ​​the suction port 21 is limited to be less than the minimum cross-sectional area of ​​the internal channel 22 of the flexible tube 2, making the suction port 21 the first threshold for particles to enter the internal channel 22 of the flexible tube 2; wherein, the minimum cross-sectional area can be understood as the area corresponding to the smallest cross-section among the various cross-sections of the suction port 21 or the internal channel 22, and the cross-section of the suction port 21 or the internal channel 22 can be circular, elliptical, polygonal or other irregular shapes.

[0056] In complex environments such as toolboxes, drawers, and narrow crevices, the objects to be sucked in include not only dust and fine debris, but also larger or irregularly shaped particles such as screws, parts, sand agglomerates, or fiber clumps. If the cross-sectional area of ​​the suction port 21 is similar to that of the internal channel 22 of the flexible tube 2, or if the opening of the suction port 21 is too large, these larger particles are more easily sucked in and enter the internal channel 22 of the flexible tube 2 under negative pressure, resulting in deep blockage or clogging, making cleaning more difficult.

[0057] By incorporating a contraction section 23 at the suction port 21, the minimum cross-sectional area of ​​the suction port 21 is made smaller than the minimum cross-sectional area of ​​the internal channel 22 of the flexible tube 2. Larger particles are geometrically limited near the suction port 21 and tend to be blocked outside the suction port 21 or remain in the exposed area near the suction port 21, rather than easily entering the depths of the internal channel 22 of the flexible tube 2. Therefore, even if foreign objects become stuck during cleaning, the blockage location is closer to the distal end of the flexible tube 2 and is more visible, allowing users to quickly remove them through external wiping, shaking, or simple removal.

[0058] In one exemplary embodiment, please refer to Figure 2 and Figure 3 As shown, the lateral dimension of the suction port 21 is preferably between 1 and 2 mm; and / or the length of the flexible tube 2 is preferably between 10 and 80 mm.

[0059] In order to effectively constrain the objects entering the air path in mixed-item scenarios, the lateral dimension of the suction port 21 is limited to between 1 and 2 mm, making it difficult for items such as screws and parts that are significantly larger than this threshold to enter the internal channel 22 of the flexible tube 2 through the suction port 21. This reduces the probability of accidental suction and reduces subsequent sorting costs in mixed-item scenarios such as cleaning toolboxes and drawers.

[0060] Meanwhile, this size range ensures that dust, fine debris, and other particles can be smoothly drawn into the suction port 21, allowing it to maintain effective suction capacity while providing filtration and interception. If the lateral dimension of the suction port 21 is too large, the risk of accidental aspiration increases; if the lateral dimension is too small, the suction resistance may increase significantly, reducing suction efficiency, and even making the suction port 21 more prone to blockage in the presence of fibrous debris. Limiting the lateral dimension of the suction port 21 to between 1 and 2 mm helps to achieve a balance between suppressing accidental aspiration and ensuring unobstructed suction, and makes blockages more likely to occur at the exposed end of the suction port 21, facilitating cleaning and preventing particles from entering the deep channels 22 of the flexible tube 2 and causing difficult-to-treat deep blockages.

[0061] To further improve the accessibility and operational stability of the cleaning head in narrow areas, the length of the flexible tube 2 is preferably 10-80mm. The length of the flexible tube 2 is the axial dimension between the connection point of the proximal end of the flexible tube 2 and the main body 1 and the suction port 21 at the distal end of the flexible tube 2. This length determines the penetration depth of the flexible tube 2 into dead corners such as door and window gaps, chair seat gaps, and drawer corners, and also affects the bending deformation and brushing contact range of the flexible tube 2 under negative pressure.

[0062] When the length of the flexible tube 2 is less than 10 mm, the distal end of the flexible tube 2 may have difficulty fully extending into and conforming to the internal boundary of deep or narrow gaps, resulting in insufficient reach to deep dust accumulation. When the length of the flexible tube 2 is greater than 80 mm, the flexible tube 2 is more prone to excessive bending, curling, or swaying when pushed into gaps or near corners, which may reduce the stable contact capability in narrow areas and increase the resistance along the airflow, thus affecting the suction efficiency. Limiting the length of the flexible tube 2 to the range of 10-80 mm is beneficial to achieving a reasonable balance between penetration, conformity, and airflow resistance, allowing the flexible tube 2 to enter narrow dead angles and form brushing contact while maintaining a relatively stable geometry and airflow delivery capability.

[0063] In one exemplary embodiment, please refer to Figure 1 and Figure 2 As shown, multiple flexible tubes 2 are arranged in an array to form a brushing structure, and the distal end faces of the multiple flexible tubes 2 together define a distal plane 31.

[0064] Multiple flexible tubes 2 are arranged in an array in the connection area of ​​the main body 1, thereby forming a brushing structure at the working end of the cleaning head. The flexible tube array can be understood as multiple flexible tubes 2 being distributed in space according to a predetermined arrangement pattern, such as being arranged in rows and columns along the width and height directions of the main body 1, or arranged in a ring or fan shape along the circumference, so that the distal ends of the flexible tubes 2 present a bristle-like aggregate shape in terms of overall appearance and contact form.

[0065] Because the flexible tube 2 has a certain degree of flexibility, its distal end can undergo elastic deformation and conform to the surface or edge of the gap when it comes into contact with the area to be cleaned, thereby enabling the dust to be moved and disturbed, as well as reaching narrow areas. Compared with a single suction port 21 or a rigid nozzle of a single shape, the brushing structure formed by the flexible tube array can provide multi-point contact and greater spatial adaptability on complex boundaries, allowing the cleaning head to enter geometrically limited areas such as door and window gaps, chair seat crevices, and drawer corners, and effectively cover the dust-accumulated areas during contact, improving the cleaning efficiency of dead corner areas.

[0066] To ensure a more stable contact posture and improve brushing consistency during use, the distal ends of multiple flexible tubes 2 are designed to collectively define a distal plane 31, or to ensure that the distal ends are approximately on the same plane. This common definition of a distal plane 31 does not require that the distal ends of each flexible tube 2 strictly fall on the same geometric plane. Rather, it emphasizes that the distal ends of the flexible tubes 2 form an approximately flat end profile overall, keeping the height difference between the distal ends within acceptable tolerances. This allows the distal ends of the flexible tubes 2 to participate in the brushing and suction process with a relatively consistent contact depth when the cleaning head approaches the surface to be cleaned.

[0067] By aligning the distal ends roughly on the same plane, the flexible tube array more easily achieves uniform force and brushing coverage when contacting the area to be cleaned. This avoids excessive bending or curling caused by excessively long individual flexible tubes 2 leading to localized pre-stressing, and also avoids blind spots caused by insufficient localized contact due to excessively short individual flexible tubes 2. The aforementioned end-plane-oriented morphology makes the working boundary of the brushing structure more controllable, which is beneficial for improving operational stability at planes, corners, or crevices.

[0068] During brushing, the flexible tube array can agitate adhering dust from gaps or corners, creating a more easily sucked-in suspended or loose state of dust near the distal end of the flexible tube 2. Because multiple suction ports 21 are distributed at multiple points near the distal plane 31, the agitated dust can enter the nearest suction port 21 and be transported to the flow channel 11 of the main body 1, reducing the probability of secondary dust deposition and repeated operations. The array arrangement also provides a certain degree of redundancy; when some distal ends of the flexible tubes 2 are blocked or adhered to in narrow areas, the remaining flexible tubes 2 can still maintain suction and brushing functions, thereby improving continuous operation capability in complex scenarios.

[0069] Specifically, please refer to Figure 2 As shown, the distal end face of the flexible tube array forms a distal plane 31. To make it easier for the cleaning head to penetrate narrow areas and maintain stable contact and suction during actual use, the distal plane 31 is designed to form an angle of 30~60° with the horizontal plane. Figure 2 The included angle α is preferably 45°.

[0070] The horizontal plane here can be understood as a reference plane parallel to a base plane such as the ground or a tabletop, and the included angle α is when the cleaning head is placed perpendicular to the horizontal plane (e.g., ...). Figure 2 (As shown) The angle between the distal plane 31 and the horizontal plane. The inclined setting of the distal plane 31 relative to the horizontal plane makes the working end of the flexible tube array present a sloping shape with the front lower and the back higher or the front higher and the back lower, thereby forming an operating angle and contact angle that are more in line with human operating habits when the cleaning head approaches the area to be cleaned.

[0071] By limiting the angle α between the distal plane 31 and the horizontal plane to a range of 30~60°, the cleaning head can be aligned with the distal end of the flexible tube 2 in narrow corners such as door and window gaps, chair seat gaps, and drawer corners without the need for a large wrist rotation when hand-held. It can be inserted or fitted to the boundary more smoothly along the gap in an inclined posture, reducing repeated adjustments caused by posture mismatch, thereby improving operating comfort and work efficiency.

[0072] The tilt angle of the distal plane 31 relative to the horizontal plane also affects the contact pattern and force distribution between the flexible tube array and the surface to be cleaned. When the distal plane 31 approaches the surface to be cleaned at an angle of 30 to 60 degrees, the distal end of the flexible tube 2 is more likely to contact the corner or gap entrance with the leading edge first, so that the flexible tube 2 has stronger guiding ability when entering narrow areas, and avoids the end being directly facing the surface to be cleaned, which would cause pressure, jamming or slippage.

[0073] When the tilt angle of the distal plane 31 relative to the horizontal plane is too small, the distal end of the flexible tube 2 may tend to adhere more parallel to the surface to be cleaned, resulting in insufficient guiding ability into the gap; when the tilt angle is too large, the distal end of the flexible tube 2 may tend to make more perpendicular contact, resulting in increased local contact pressure and reduced stable sliding performance. Limiting the tilt angle to between 30 and 60° is beneficial for achieving a balance between guiding performance, adhesion, and stability, allowing the flexible tube array to smoothly penetrate along the gap entrance while maintaining relatively uniform contact coverage during the cleaning process.

[0074] In one exemplary embodiment, please refer to Figure 2 As shown, the proximal end faces of multiple flexible tubes 2 jointly define a proximal plane 32, which is parallel to the distal plane 31, and the lengths of each flexible tube 2 are equal.

[0075] The proximal plane 32 can be understood as the end reference plane of multiple flexible tubes 2 on the side close to the main body 1. The proximal end faces of multiple flexible tubes 2 are generally in the same reference plane or approximately in the same reference plane, so that the connection position between the proximal end of the flexible tube 2 and the main body 1 has a relatively uniform axial reference. The proximal plane 32 is parallel to the distal plane 31, so that the flexible tube array maintains a relatively consistent tilt posture and end face profile in the overall shape.

[0076] The equal length of each flexible tube 2 further defines the consistent axial dimensions of the flexible tube 2 from its proximal end to its distal end, making the effective length of the internal channel 22 of each flexible tube 2 equal. Since the internal channel 22 of the flexible tube 2 connects to the flow channel 11 of the main body 1 at its proximal end and to the suction port 21 at its distal end, the length of the internal channel 22 of the flexible tube 2 directly constitutes part of the suction path. When the length of the internal channel 22 of each flexible tube 2 is equal, the path length traversed by the airflow entering from each suction port 21 before entering the flow channel 11 of the main body 1 is consistent, thereby making the friction resistance and pressure drop of each flexible tube 2 tend to be consistent, reducing the uneven flow distribution caused by path differences within the array.

[0077] If there are significant differences in the length of the internal channels 22 of different flexible tubes 2, the flexible tube 2 with a shorter path is more likely to obtain a larger flow rate, while the suction capacity of the flexible tube 2 with a longer path may be relatively reduced, resulting in uneven distribution of array suction, weak local cleaning effect, or cleaning blind spots. By making the length of each flexible tube 2 equal and making the proximal plane 32 parallel to the distal plane 31, consistency constraints can be achieved in both geometric and air path dimensions, making the suction capacity of each suction port 21 more balanced and improving overall cleaning consistency.

[0078] The shared proximal end face defining the proximal plane 32 facilitates the formation of a unified connection interface, making it easier to control the connection depth, sealing tightness, and positioning relationship between the proximal end of the flexible tube 2 and the main body 1, thereby reducing the risk of leakage or loosening. The parallel arrangement of the proximal plane 32 and the distal plane 31 allows the flexible tube array to maintain a relatively regular geometric structure even under inclined end face conditions, preventing the flexible tube 2 from twisting or excessively bending locally due to inconsistent installation references, thus improving the durability of the flexible tube 2 during repeated insertion into narrow gaps and repeated brushing contact processes.

[0079] In one exemplary embodiment, please refer to Figure 2 and Figure 4 As shown, multiple pressure relief holes 12 are provided on opposite sides of the outer peripheral wall of the main body 1, and the multiple pressure relief holes 12 on opposite sides are arranged at intervals along a direction parallel to the proximal plane 32.

[0080] The pressure relief holes 12 are distributed in groups at different circumferential positions of the main body 1, thereby forming symmetrical or nearly symmetrical air supply passages on opposite sides of the outer peripheral wall of the main body 1. The opposite side regions can be understood as two regions on the outer peripheral wall of the main body 1 that are separated by a certain angle along the circumference. These two regions are in opposite positions in the shape of the main body 1, which allows outside air to enter the flow channel 11 evenly on both sides of the main body 1, reducing the local airflow deviation caused by unilateral air supply.

[0081] Multiple pressure relief holes 12 are connected to the flow channel 11 inside the main body 1 and to the external atmospheric environment, thereby providing a supplementary air path for the flow channel 11 when the suction port 21 is blocked or the flow is restricted; multiple pressure relief holes 12 are distributed on opposite sides, expanding the air supply point to multiple points, which can maintain a relatively stable air supply capacity under different postures or different blocking positions, and reduce the probability of pressure relief holes 12 failing due to local blocking, adhesion or dust accumulation.

[0082] Multiple pressure relief holes 12 are arranged at intervals in each side region along a direction parallel to the proximal plane 32. Here, the direction parallel to the proximal plane 32 means that the arrangement direction is parallel to the proximal plane 32 and is located on one side of the proximal plane 32. That is, the pressure relief holes 12 corresponding to the arrangement direction are located in the side region of the proximal plane 32 facing the negative pressure source, so that the pressure relief holes 12 are set in the main body part 1 section closer to the negative pressure source.

[0083] By arranging the row of pressure relief holes 12 as a whole on the side of the proximal plane 32 facing the negative pressure source, the pressure relief holes 12 can be closer to the connection end of the main body 1 and the air passage section on the negative pressure source side. This allows for faster introduction of outside air into the flow channel 11 when the suction port 21 is blocked, resulting in an abnormal increase in negative pressure. This shortens the air supply path and improves the pressure relief response speed, thereby more effectively suppressing negative pressure peaks, mitigating adsorption stagnation, and stabilizing the inhalation process.

[0084] The pressure relief holes 12 on both sides are preferably arranged in a one-to-one correspondence, so that the pressure relief holes 12 on both sides are distributed in pairs and are roughly opposite each other in the circumferential direction. The one-to-one correspondence of the pressure relief holes 12 on both sides makes the main body 1 more symmetrical in terms of structural stress and processing layout, which can reduce the uneven local stiffness of the outer peripheral wall caused by the opening, and reduce the deformation and offset caused by external force extrusion, connection torsion or negative pressure pulsation during use.

[0085] Meanwhile, the pressure relief holes 12 on both sides of the main body 1 provide a more balanced flow path for the introduction of outside air, allowing the replenishing airflow to enter simultaneously from both sides of the main body 1 and converge within the flow channel 11. This reduces lateral scouring and vortices caused by unilateral air replenishment, improving the stability of the air replenishment process. For different gripping postures or situations where the cleaning head deflects laterally in a narrow space, the pressure relief holes 12 on both sides can also improve the availability of outside air inlets, preventing one side's pressure relief hole 12 from completely failing due to being close to the wall or being blocked, thereby enhancing the pressure relief redundancy under abnormal operating conditions.

[0086] In one exemplary embodiment, please refer to Figure 1 As shown, in order to ensure that the flexible tube 2 maintains good adaptability under conditions of narrow gap insertion, corner fitting, and brushing contact, and at the same time maintains sufficient structural strength and airtight stability at the connection with the main body 1, the flexibility of the flexible tube 2 varies in a gradient along its axial direction, and / or the wall thickness of the flexible tube 2 varies in a gradient along its axial direction, so that the flexibility at the distal end of the flexible tube 2 is greater than that at the proximal end.

[0087] Here, flexibility refers to the ability of flexible tube 2 to bend and deform under external force. The flexibility of flexible tube 2 can gradually decrease from the far end to the near end, or it can be reduced in a stepwise manner in a segmented way to adapt to the needs of different processing technology and different working conditions. The gradient change of wall thickness is used to provide an equivalent flexibility gradient. By having a relatively smaller wall thickness at the far end and a relatively larger wall thickness at the near end, the flexible tube 2 is easier to bend and fit at the far end, and less likely to collapse or curl at the near end.

[0088] The distal end of the flexible tube 2 is positioned to contact the area to be cleaned, especially in narrow, hard-to-reach areas such as door and window seams, chair seat gaps, and drawer corners. The distal end needs to be able to smoothly penetrate and conform to the boundary of the gap, while simultaneously creating an effective brushing action during contact to disturb accumulated dust and bring particles closer to the suction port 21. With greater flexibility at the distal end, the distal end of the flexible tube 2 can undergo elastic deformation under the guidance of the edge structure when pushed in or near the gap entrance, reducing the probability of hard-hitting or jamming, and can conform to irregular boundaries to form a larger effective contact area, allowing the brushing structure to more fully cover corners and the inner walls of gaps. At the same time, the flexible deformation of the distal end reduces the risk of scratching the surface to be cleaned, improves the stability of the contact, and makes it easier for the suction port 21 to maintain a certain air intake gap under multi-point distribution conditions, thereby improving the continuity and stability of the suction process.

[0089] Correspondingly, the proximal end is located in the connection area between the flexible tube 2 and the main body 1. The proximal end not only undertakes the convergence and transmission of the intake airflow, but also needs to maintain the stability of the cross-section of the internal channel 22 under negative pressure to avoid collapse, folding, or curling due to excessively soft tube walls, which would lead to a sudden reduction in flow area or jamming. The relatively small flexibility of the proximal end can improve the anti-curling ability, allowing the flexible tube 2 to more effectively transmit external force to the distal end when inserted into the gap, avoiding the situation where the proximal end has bent and rebounded before the distal end has entered the target position, thereby improving the insertion depth and control accuracy. At the same time, the relatively small flexibility of the proximal end is also conducive to improving the stability of the connection interface with the main body 1, so that the proximal end can maintain a reliable fixed state and sealing state under repeated insertion and removal, repeated bending, and airflow pulsation, reducing the risk of air leakage, loosening, or fatigue damage.

[0090] In terms of implementation, the flexibility gradient of the flexible tube 2 can be achieved by varying the material properties along the axial direction, by varying the wall thickness along the axial direction, or by a combination of both. For example, the section of the flexible tube 2 near the distal end can use a thinner wall thickness or a lower hardness material to improve distal flexibility and enhance adhesion and brushing capabilities; the section of the flexible tube 2 near the proximal end can use a thicker wall thickness or a higher hardness material to improve proximal anti-curling and anti-fatigue performance and enhance connection stability.

[0091] In one exemplary embodiment, please refer to Figure 2 and Figure 3 As shown, the suction port 21 of the flexible tube 2 is located in contact with or close to the area to be cleaned by the cleaning head. The outer edge of the distal end of the flexible tube 2 is arranged around the suction port 21 and forms the boundary outline of the suction port 21. The outer edge of the distal end of the flexible tube 2 is preferably provided with a chamfer and / or rounded corner structure.

[0092] To improve the flow stability of the suction port 21 and enhance the brushing reach in complex scenarios, the distal outer edge of the flexible tube 2 is provided with a chamfer and / or rounded corner structure. The chamfer or rounded corner structure can be set in the transition area adjacent to the opening of the suction port 21, so that the distal outer edge forms a smooth transition from the outer surface of the flexible tube 2 to the opening of the suction port 21, avoiding the formation of sharp edges or abrupt geometric corners. This structurally reduces the local stress concentration and frictional resistance at the boundary of the suction port 21, and improves the contact and sliding characteristics between the distal end and the area to be cleaned.

[0093] In scenarios involving a mix of items such as toolboxes, drawers, and narrow crevices, the objects to be sucked up may include not only dust and fine debris, but also larger or irregularly shaped particles. The flexible tube 2 has a relatively small lateral dimension of its suction port 21, making it difficult for large particles to enter the internal channel 22 through the port 21. However, under negative pressure, large particles may be adsorbed to the distal end of the flexible tube 2 and adhere to the vicinity of the opening of the suction port 21, causing at least partial obstruction of the port 21. This results in a reduction in the local flow area, decreased suction efficiency, and even persistent suction blockage.

[0094] After the outer edge of the flexible tube 2 is chamfered or rounded, the outer edge of the flexible tube 2 changes from a sharp edge to a curved or sloping surface, making the contact between large particles and the outer edge of the flexible tube 2 more likely to be point contact or line contact rather than surface contact, reducing the probability of large particles forming a stable adhesion at the outer edge of the flexible tube 2; at the same time, the smooth transition can weaken the local negative pressure concentration and eddy current retention at the boundary of the suction port 21, making it easier for the adhered particles to detach under the action of brushing or vibration, thereby reducing the probability of the suction port 21 of the flexible tube 2 being covered by large particles.

[0095] Furthermore, the chamfered and rounded corner structures enhance the brushing action and improve reach in narrow areas. When the flexible tubes 2 are arranged in an array to form a brushing structure, the distal outer edge of the flexible tube 2 bears direct friction and disturbance when contacting the surface to be cleaned, the edge of a crevice, or the inner wall of a corner. The chamfered and / or rounded corner structure of the distal outer edge can create a smoother sliding path during contact, making it less prone to scraping and jumping when the flexible tube 2 advances along the edge of a crevice or swings laterally, thereby improving the continuity and controllability of the brushing action.

[0096] Meanwhile, the chamfered or rounded geometry creates a more effective agitation at the contact boundary, making it easier to disturb attached dust and bring it into the airflow zone near the suction port 21, thus improving the synergistic efficiency of brushing and suction. In addition, the smooth transition of the distal outer edge reduces the risk of scratching the surface being cleaned, improves the user experience, and enhances the applicability of the cleaning head on various surface materials.

[0097] In one exemplary embodiment, please refer to Figure 1As shown, the cleaning head also includes an interface part 4 for connecting to the pipe of the negative pressure source. The interface part 4 includes a snap-fit ​​structure 41 adapted to the pipe of the negative pressure source. The interface part 4 is detachably connected to the pipe of the negative pressure source through the snap-fit ​​structure 41. The main body part 1 is connected to the interface part 4.

[0098] The interface section 4 is equipped with a snap-fit ​​structure 41 adapted to the connector of the negative pressure source. The snap-fit ​​structure 41 is configured to cooperate with the corresponding mating structure on the connector to achieve quick assembly and reliable locking. The interface section 4 is detachably connected to the connector of the negative pressure source through the snap-fit ​​structure 41, allowing the cleaning head to be replaced between different cleaning accessories and facilitating disassembly, maintenance, or cleaning of the cleaning head after cleaning. The main body section 1 is connected to the interface section 4, and the flow channel 11 formed inside the main body section 1 is connected to the communicating channel inside the interface section 4, forming a continuous negative pressure transmission path between the negative pressure source, connector, interface section 4, main body section 1, and flexible tube 2, thereby ensuring that the negative pressure generated by the negative pressure source can effectively act on the suction port 21 of the flexible tube 2.

[0099] The interface section 4 is preferably located on the side of the cleaning head near the negative pressure source. The main body section 1 and the interface section 4 are connected sequentially along the airflow direction, so that the interface section 4 is located upstream of the negative pressure transmission link and undertakes the docking function with the connecting pipe. The interface section 4 can be configured with a plug section or a socket cavity. The plug section or socket cavity is sleeved with the end of the connecting pipe and locked by a snap-fit ​​structure 41 to limit axial separation and prevent circumferential rotation or loosening. The connection between the interface section 4 and the main body section 1 is preferably provided with a sealed mating interface to reduce leakage during negative pressure transmission, improve suction efficiency and reduce energy loss.

[0100] The specific form of the snap-fit ​​structure 41 may include snap-fit, slot, elastic tongue, ring, and other structural units that can be detached and locked. Assembly and disassembly can be achieved by pressing to release, rotating to unlock, or pulling to disengage, thereby simplifying the user's operation process while ensuring the reliability of the connection.

[0101] As the final actuator of the negative pressure cleaning system, the cleaning head needs to be quickly connected to or replaced with the negative pressure source in different scenarios. The interface part 4 achieves a detachable connection through the snap-fit ​​structure 41, which facilitates convenient replacement while maintaining connection strength and sealing performance, lowers the threshold for accessory replacement, and improves the product's platform adaptability. On the other hand, the interface part 4 modularizes the connection relationship between the pipe and the main body 1, allowing the structural design of the main body 1 to focus more on the arrangement of functional structures such as the flexible tube array, pressure relief hole 12, and flow channel 11, while the interface part 4 is used to standardize the connection of different types of pipes, improving the compatibility and assembly consistency of the whole system.

[0102] In terms of working mechanism, the negative pressure generated by the negative pressure source is transmitted to the interface section 4 through the connecting pipe. The connecting channel inside the interface section 4 further transmits the negative pressure to the flow channel 11 of the main body section 1. The flow channel 11 of the main body section 1 is connected to the proximal ends of multiple flexible tubes 2. The negative pressure is distributed by the flow channel 11 to the internal channels 22 of each flexible tube 2, so that a suction field is formed near the distal suction port 21 of each flexible tube 2. When the cleaning head approaches the area to be cleaned, the suction port 21 sucks in dust or fine debris under the drive of negative pressure. The particles enter the flow channel 11 of the main body section 1 through the internal channels 22 of the flexible tube 2 and are transported to the dust collection structure on the negative pressure source side, thereby cleaning the area to be cleaned.

[0103] In the aforementioned process, the interface section 4 not only performs the function of negative pressure transmission, but also provides connection positioning and locking through the snap-fit ​​structure 41. This ensures that the cleaning head maintains a stable connection with the connecting pipe during repeated movements, insertion into narrow gaps, and brushing contact, preventing suction power attenuation due to loosening or air leakage, thereby improving the stability of the cleaning operation. Through the detachable connection design of the interface section 4, the cleaning head ensures effective negative pressure transmission while also considering ease of installation and maintenance.

[0104] In one exemplary embodiment, please refer to Figure 4 As shown, the materials of the main body 1 and the flexible tube 2 preferably include at least one of thermoplastic elastomer, thermoplastic polyurethane, polyvinyl chloride, and silicone rubber, so that the cleaning head can obtain good flexibility and bending resistance at the working end, and is not easy to break when repeatedly contacting the surface to be cleaned, inserting into gaps, and undergoing elastic deformation.

[0105] Materials such as thermoplastic elastomers (TPE), thermoplastic polyurethanes (TPU), polyvinyl chloride (PVC), and silicone rubber typically possess good elastic recovery and fatigue resistance, enabling the flexible tube 2 to maintain the shape of its internal channel 22 and the geometric stability of its suction port 21 even after repeated bending. This ensures a continuous suction path and reduces the risk of air leakage or channel blockage due to material brittleness. Furthermore, these materials are highly adaptable to molding processes, facilitating reliable connection between the flexible tube 2 and the main body 1 through injection molding, extrusion, overmolding, or secondary molding. This also creates a good seal at the connection interface, further stabilizing the communication between the flow channel 11 within the main body 1 and the internal channel 22 of the flexible tube 2.

[0106] Considering the differences in product platforms and strength requirements, in other embodiments, the main body 1 can also be made of rigid materials such as plastic or metal. Rigid materials such as plastic or metal can provide higher structural strength and dimensional stability, making the main body 1 less prone to deformation during long-term use, thereby ensuring reliable connection with the interface part 4 and maintaining the positioning accuracy of the connection position between the flow channel 11 of the main body 1 and the flexible tube 2.

[0107] When the main body is made of rigid material, the flexible tube can still be made of soft materials such as thermoplastic elastomer, thermoplastic polyurethane, polyvinyl chloride or silicone rubber, and can be connected to the main body by means of plug-in, snap-fit, overmolding or bonding, so that the main body provides rigid support and stable interface.

[0108] This disclosure also provides a cleaning device including a main unit for providing negative pressure and the aforementioned cleaning head, the main unit being connected to the cleaning head via a connector.

[0109] The main unit is equipped with a negative pressure device, which may include a fan assembly, a motor assembly, and an air passage assembly connected to the dust collection structure. This device enables the main unit to generate a stable negative pressure and continuous airflow within the air passage system during operation. The main unit is connected to the cleaning head via a connecting pipe. This connecting pipe serves as an air passage connection between the main unit and the cleaning head, forming a communication channel. This allows the negative pressure generated by the main unit to be transmitted to the interior of the cleaning head via the connecting pipe, thereby creating a suction field near the suction port of the cleaning head.

[0110] The main unit, connecting pipe, flow channel of the main body, and internal channel of the flexible tube together form the suction path from the suction port to the negative pressure source. Dust or fine debris, driven by negative pressure, enters the internal channel of the flexible tube through the suction port and flows into the flow channel of the main body. Subsequently, it enters the dust collection structure of the main unit through the connecting pipe, realizing the collection and separation of particles. The cleaning head structurally undertakes the end-effector function. Multiple flexible tubes form a brushing structure in an array, enabling the cleaning device to reach and agitate and suck up dust in narrow areas such as door and window gaps, chair seat crevices, and drawer corners. This reduces the operational burden caused by switching between different accessories, thereby improving cleaning efficiency and stability in complex scenarios.

[0111] In summary, the cleaning head and electric device provided in this disclosure feature a flexible tube on the cleaning head and a limited suction port size, which restricts the suction object at the suction port, thereby reducing the probability of small objects being accidentally sucked into the air path in mixed object scenarios. At the same time, due to the limited suction port and relatively larger internal channel, larger particles are more likely to be intercepted at the suction port end, and the blockage location is more exposed, making it easier for users to clean quickly. In addition, by setting a pressure relief hole, it can provide air supply and pressure relief channels for the air path when the suction port is blocked or the flow is restricted, suppressing abnormal rises in negative pressure and reducing jamming and suction fluctuations.

[0112] It will be apparent to those skilled in the art that this disclosure is not limited to the details of the exemplary embodiments described above, and that this disclosure can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of this disclosure is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this disclosure. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0113] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A cleaning head, characterized in that, include: The main body is used to connect to the negative pressure source and forms a flow channel for communicating with the negative pressure source; Multiple flexible tubes, the proximal end of which is connected to the main body and communicates with the flow channel, and the distal end of which forms a suction port for inhaling particulate matter; Wherein, for any of the flexible tubes, the lateral dimension of its suction port is smaller than the lateral dimension of the internal channel of the flexible tube; the main body is provided with a pressure relief hole communicating with the flow channel, and the pressure relief hole is closer to the negative pressure source relative to the flexible tube in the airflow direction along the suction port towards the negative pressure source.

2. The cleaning head according to claim 1, characterized in that, The pressure relief hole is connected to the external atmosphere to introduce outside air into the flow channel when the suction port is at least partially blocked.

3. The cleaning head according to claim 1, characterized in that, The flexible tube has a constricted section at the end near the suction port, such that the minimum cross-sectional area of ​​the suction port is smaller than the minimum cross-sectional area of ​​the internal channel of the flexible tube.

4. The cleaning head according to claim 1, characterized in that, The lateral dimension of the suction port is between 1 and 2 mm; and / or the length of the flexible tube is between 10 and 80 mm.

5. The cleaning head according to claim 1, characterized in that, Multiple flexible tubes are arranged in an array to form a brushing structure, and the distal end faces of the multiple flexible tubes together define a distal plane.

6. The cleaning head according to claim 5, characterized in that, The angle between the distal plane and the horizontal plane is 30-60° to accommodate the tilted cleaning posture.

7. The cleaning head according to claim 5, characterized in that, The proximal end faces of the plurality of flexible tubes together define a proximal plane, the proximal plane being parallel to the distal plane, and the lengths of the flexible tubes being equal.

8. The cleaning head according to claim 7, characterized in that, The outer peripheral wall of the main body is provided with a plurality of pressure relief holes on opposite sides, and the plurality of pressure relief holes on opposite sides are arranged at intervals along a direction parallel to the proximal plane.

9. The cleaning head according to claim 1, characterized in that, The flexibility of the flexible tube varies in a gradient along its axial direction, and / or the wall thickness of the flexible tube varies in a gradient along its axial direction, such that the distal flexibility of the flexible tube is greater than the proximal flexibility.

10. The cleaning head according to claim 1, characterized in that, The flexible tube has a chamfered and / or rounded corner structure at its distal outer edge.

11. The cleaning head according to claim 1, characterized in that, The cleaning head also includes an interface for connecting to a negative pressure source pipe. The interface includes a snap-fit ​​structure adapted to the negative pressure source pipe. The interface is detachably connected to the negative pressure source pipe via the snap-fit ​​structure. The main body is connected to the interface.

12. The cleaning head according to claim 1, characterized in that, The main body and the flexible tube are made of at least one of thermoplastic elastomer, thermoplastic polyurethane, polyvinyl chloride, and silicone rubber.

13. A cleaning device, characterized in that, It includes a main unit for providing negative pressure and a cleaning head according to any one of claims 1 to 12, wherein the main unit is connected to the cleaning head via a connector.

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