Dust scraping device for filter screen cover of cleaning machine

Abstract

The invention relates to the technical field of cleaning machines, in particular to a dust scraping device for a filter screen cover of a cleaning machine, which comprises a main machine shell and a dust collecting cup connected with the main machine shell in a matched manner, a dust collecting motor and a filter screen cover covering the dust collecting motor are arranged in the main machine shell, and the dust collecting cup covers the outer side of the filter screen cover. A dust scraping piece is arranged between the inner wall of the dust collecting cup and the outer wall of the filter screen cover in a sliding mode, and the dust scraping piece is driven by a driving mechanism to slide between the inner wall of the dust collecting cup and the outer wall of the filter screen cover in the axial direction of the dust collecting cup so as to remove dust on the outer wall of the filter screen cover. The driving mechanism drives the dust scraping piece to slide between the dust collecting cup and the filter screen cover, the automatic cleaning function without disassembling the assembly is achieved, and the effects that operation convenience is remarkably improved, dust scattering is avoided, and part loss is reduced are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of cleaning machines, in particular to a dust scraping device for a filter screen cover of a cleaning machine. Background Art

[0002] During vacuuming, the dust and other particles in the fluid are initially separated and filtered through the filter in the dust cup. Because the filter is typically made of metal, static electricity causes dust, hair, and other impurities in the fluid to adhere firmly to the filter's surface. Over time, these deposits accumulate, clogging the filter's pores and significantly reducing the device's suction performance, severely impacting the filtration effect and user experience.

[0003] Traditional solutions require users to remove the entire dust cup assembly from the main unit, remove the filter screen from the dust cup, and manually clean the dust and hair adhering to the screen. This cleaning method is not only cumbersome and easily dirty, but also can cause dust to scatter during the disassembly and assembly process, causing secondary contamination. Furthermore, frequent disassembly increases the risk of component damage, shortening the device's lifespan.

[0004] Although the prior art has proposed a technical solution to simplify the cleaning process by providing a dust removal component in the dust cup, such as application publication number CN113069034 A, which discloses a dust cup, which includes a cup body, which surrounds the outside of the filter screen cover; a dust removal component is provided between the filter screen cover and the cup body for removing dust from the outer wall of the filter screen cover, and when the cup body is taken or placed, the dust removal component moves on the outer wall of the filter screen cover to remove dust from the filter screen cover. The method of the above technical solution is that the cup body and the filter screen cover move relative to each other, and the suspended end of the dust removal component moves on the outer wall of the filter screen cover, so that the dust and / or hair on the outer wall falls off from the outer wall and enters the dust accumulation area of ​​the cup body, thereby completing the cleaning of the filter screen cover. Compared with traditional solutions, it undoubtedly greatly improves the user experience.

[0005] However, the above solution still has obvious shortcomings. For example, when the dust cup is separated from the main unit for cleaning, the sliding action of the dust removal element on the filter cover can easily cause the scraped dust to overflow from the dust cup, which not only fails to achieve the ideal cleaning effect, but also dirtyes the user's hands and work environment, affecting the user experience.

[0006] In view of the above problems, the existing technology is in urgent need of improvement. Summary of the Invention

[0007] The object of the present invention is to provide a dust scraping device for a filter screen cover of a cleaning machine and its components, which have the advantages of convenient operation, avoidance of secondary pollution, improved cleaning efficiency and extended service life of the equipment.

[0008] The present invention provides a dust scraping device for a filter screen cover of a cleaning machine, and the technical solution is as follows: it includes a main body shell and a dust collecting cup connected to the main body shell, a dust suction motor is provided in the main body shell, and a filter screen cover is provided outside the dust suction motor. It is characterized in that the dust collecting cup is covered on the outside of the filter screen cover, and a dust scraper is slidably provided between the inner wall of the dust collecting cup and the outer wall of the filter screen cover. The dust scraper is driven by a driving mechanism to slide between the inner wall of the dust collecting cup and the outer wall of the filter screen cover along the axial direction of the dust collecting cup to remove dust on the outer wall of the filter screen cover.

[0009] Furthermore, the present invention also proposes that the scraper blade is in a ring shape and is sleeved on the outer periphery of the filter screen cover.

[0010] Furthermore, the present invention also proposes that the driving mechanism includes a bracket arranged in the main body shell, a driving button is fixedly connected to the bracket, a movable groove is provided horizontally in the front and rear directions on the main body shell, the movable groove is arranged through the outer wall of the main body shell, the driving button extends out of the movable groove, and the dust scraper is arranged on the bracket.

[0011] Furthermore, the present invention also proposes that a handle is provided on the main body shell, and the handle is arranged corresponding to the movable groove.

[0012] Furthermore, the present invention also proposes that a sliding groove is provided on the inner wall of the main body shell, and the bracket foot of the bracket can be slidably arranged in the sliding groove.

[0013] Furthermore, the present invention also proposes that it also includes a mounting member, which fixes the filter screen cover on the main body shell.

[0014] Furthermore, the present invention also proposes that the dust cup is detachably connected to the main body shell.

[0015] Furthermore, the present invention also proposes that the dust collection motor is fixed in the main body housing through a mounting member.

[0016] Furthermore, the present invention also proposes that a dust suction port is provided on the dust collecting cup.

[0017] From the above, it can be seen that the present invention provides a dust scraping device and its components for the filter cover of a cleaning machine, which drives the dust scraper to slide between the dust cup and the filter cover through a driving mechanism, thereby realizing an automatic cleaning function without disassembling the components, and has the effect of significantly improving operational convenience, avoiding dust scattering and reducing component loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the decomposition structure of the present invention;

[0020] Figure 3 This is a schematic cross-sectional view of the initial state of the dust scraping device of the present invention;

[0021] Figure 4 It is a cross-sectional schematic diagram of the present invention during the dust scraping process;

[0022] Figure 5 It is a schematic cross-sectional view of the dust scraping process of the present invention.

[0023] In the picture:

[0024] 1. Dust cup; 11. Suction port; 2. Main unit housing; 21. Moving slot; 22. Handle; 3. Suction motor; 4. Filter cover; 5. Mounting parts; 6. Scraper blade; 7. Dust; 8. Bracket; 81. Drive button. DETAILED DESCRIPTION

[0025] The technical solution of the present invention is described below with reference to the accompanying drawings and embodiments.

[0026] In existing technology, vacuum cleaners separate and filter dust through a filter screen within a dust cup. Because dust and hair easily cling to the filter screen, traditional cleaning methods require disassembling the dust cup and filter screen entirely for manual cleaning, which is cumbersome and carries the risk of dust leakage. While existing improved solutions achieve dust removal through relative motion between the cup and filter screen, dust can still leak out when the cup is separated from the main unit, contaminating the user's hands.

[0027] To address the aforementioned issues and the potential for leakage caused by dust cup removal, consideration was given to how to clean the filter screen 4 without separating the dust cup 1 from the main body housing 2. Analysis revealed that installing a movable scraper blade 6 inside the dust cup 1, allowing it to directly contact the surface of the filter screen 4 within a confined space, would both avoid disassembly and prevent dust 7 from escaping. Furthermore, a drive mechanism was envisioned to control the sliding path of the scraper blade 6 between the dust cup 1 and the filter screen 4, confining the scraped dust 7 within the dust cup 1.

[0028] like Figure 1-5 As shown, the present invention proposes a dust scraping device including a main body shell 2 and a dust collecting cup 1. A dust suction motor 3 and a filter screen cover 4 are provided in the main body shell 2. The dust collecting cup 1 is covered on the outside of the filter screen cover 4. A slidable dust scraper 6 is provided between the inner wall of the dust collecting cup 1 and the outer wall of the filter screen cover 4. The dust scraper 6 is driven by a driving mechanism to slide between the inner wall of the dust collecting cup 1 and the outer wall of the filter screen cover 4 along the axial direction of the dust collecting cup 1 to remove dust 7 on the outer wall of the filter screen cover 4.

[0029] Among them, the main body shell 2 refers to the main structure that carries the dust suction motor 3 and the filter screen cover 4, which can be manufactured by injection molding process and is used to provide equipment support and air flow channel sealing. The dust cup 1 refers to a container connected to the main body shell 2, which can be fixed by snap or thread connection, and is used to collect scraped dust 7 and form a closed space. The scraper blade 6 refers to a ring-shaped or strip-shaped flexible material component, such as silicone or rubber material, whose edge contacts the outer wall of the filter screen cover 4 and peels off the attachments through sliding friction. The driving mechanism refers to a mechanical component that drives the scraper blade 6 to move, such as a gear rack drive or a linear motor drive to ensure that the scraper blade 6 slides stably along the preset path.

[0030] Specifically, when the dust collection motor 3 is started, the airflow carries the dust 7 into the dust cup 1 from the dust suction port 11, and the large particles are intercepted by the filter screen 4 and attached to the outer wall. When cleaning is required, the drive mechanism pushes the scraper blade 6 to slide along the annular gap between the inner wall of the dust cup 1 and the outer wall of the filter screen 4. The edge of the scraper blade 6 is close to the surface of the filter screen 4, and the dust 7 is scraped from the outer wall and falls directly into the storage area at the bottom of the dust cup 1. The entire process does not require the removal of the dust cup 1, and the dust 7 is always confined inside the cup body to avoid the risk of leakage. Only when the dust cup 1 collects dust 7, can the dust cup 1 be removed to process the dust removed multiple times at one time.

[0031] While existing technologies rely on the separation of the dust cup from the main unit to trigger dust removal, the present invention uses a built-in drive mechanism to actively control the movement of the scraper blade 6, completing cleaning while the dust cup 1 remains connected to the main unit housing 2. In existing technologies, dust is easily scattered when the dust cup is separated from the main unit. The present invention utilizes the fixed installation characteristics of the dust cup 1 to perform the dust scraping operation in an enclosed space, significantly reducing the risk of contamination.

[0032] Through the above-mentioned technical solution, the present invention achieves online cleaning of the filter screen 4, eliminating the need for users to manually disassemble and clean components, thus preventing the hygienic issue of dust 7 coming into contact with their hands. The sliding path of the dust scraper 6 aligns with the interior space of the dust cup, ensuring that removed dust falls directly into the collection area, improving cleaning efficiency. The integrated design of the drive mechanism simplifies the operation process, requiring only the activation of the drive component to complete dust removal, thus improving the user experience.

[0033] The present invention further proposes that the scraper blade 6 is annular in shape and is sleeved on the outer periphery of the filter screen cover 4. The annular shape means that the scraper blade 6 has a closed annular geometric structure, which can be specifically achieved by injection molding of elastic rubber or silicone materials, and the inner diameter of the annular shape forms an interference fit with the outer diameter of the filter screen cover 4. This structure enables the inner peripheral surface of the scraper blade 6 to completely fit the curved surface of the outer wall of the filter screen cover 4, eliminating the contact gap. Sleeve-fitting on the outer periphery of the filter screen cover 4 means that the scraper blade 6 is assembled on the outer surface of the filter screen cover 4 in a circumferential manner, which can be specifically achieved by providing a guide groove on the inner peripheral edge of the annular scraper blade 6 to form a sliding fit with the flange of the outer wall of the filter screen cover 4. This assembly method enables the scraper blade 6 to maintain radial positioning with the filter screen cover 4 during axial movement, preventing radial displacement during movement.

[0034] Specifically, the inner circumference of the annular scraper blade 6 forms continuous surface contact with the outer wall of the filter screen 4. When the drive mechanism drives the scraper blade 6 to slide along the axis of the filter screen 4, the inner edge of the scraper blade 6 moves with constant pressure against the outer wall of the filter screen 4. Due to the circumferential continuity of the annular structure, the scraper blade 6 always covers the entire outer wall of the filter screen 4 during movement, avoiding residual unscraped areas. The sleeved assembly relationship between the scraper blade 6 and the filter screen 4 forms a radial constraint, preventing the scraper blade 6 from tilting due to motion inertia or external resistance during sliding, ensuring that the contact pressure between the inner circumference of the scraper blade 6 and the outer wall of the filter screen 4 is evenly distributed.

[0035] Through the above-mentioned technical solution, the present invention achieves continuous, all-around scraping of the outer wall of the filter screen 4, eliminating the insufficient contact problem of traditional sheet-like scrapers and significantly improving dust removal efficiency. The annular scraper blade 6 and the sleeve structure of the filter screen 4 form a dynamic sealing interface, continuously preventing dust leakage during the movement of the scraper blade 6, ensuring that the removed dust falls completely into the dust collection area, and preventing contamination of the user's hands or the work environment during the cleaning operation.

[0036] The present invention further proposes that the driving mechanism includes a bracket 8 arranged in the main body shell 2, a driving button 81 is fixedly connected to the bracket 8, a movable groove 21 is horizontally provided on the front and rear sides of the main body shell 2, the movable groove 21 is set through the outer wall of the main body shell 2, the driving button 81 extends out of the movable groove 21, and the dust scraper 6 is arranged on the bracket.

[0037] Among them, the bracket 8 refers to a supporting structure for carrying the drive button 81 and the scraper blade 6, which can be implemented by a frame structure made of metal or plastic. It is movably connected to the inner wall of the main body shell 2 through a sliding groove, which is used to provide a stable movement trajectory for the scraper blade 6. Among them, the drive button 81 refers to a component for transmitting operating force, which can be implemented by a raised structure with anti-slip grooves. It is fixedly connected to the bracket 8 and is exposed in the movable groove 21, so that the user can control the movement of the scraper blade 6 without touching the dust cup 1. Among them, the movable groove 21 refers to a guiding structure that limits the movement path of the drive button 81. It can be implemented by a linear through groove. Its structure of horizontally penetrating the outer wall of the main body shell 2 not only ensures that the drive button 81 is exposed for operation, but also forms a displacement constraint on the drive button 81 through the groove wall.

[0038] Specifically, when the filter screen cover 4 needs to be cleaned, an external force is applied to the drive button 81 to slide back and forth along the movable groove 21, driving the bracket 8 to move synchronously in the main body shell 2. The movement of the bracket 8 directly drives the annular scraper 6 connected to it to slide along the outer wall of the filter screen cover 4, scraping off the dust 7 attached to the surface of the filter screen cover 4. The through-hole design of the movable groove 21 allows the drive button 81 to always be connected to the external environment, but the length of the movable groove 21 is precisely limited to only allow the drive button 81 to move the required stroke for dust removal, thereby avoiding the formation of a through channel between the inside of the dust cup 1 and the outside world. The bracket 8 forms a sliding pair with the main body shell 2 through the sliding groove, ensuring that the scraper 6 maintains a constant contact pressure with the outer wall of the filter screen cover 4 during movement.

[0039] Through the above technical solution, the present invention allows the filter screen 4 to be cleaned while the dust cup 1 and the main unit remain assembled, eliminating the risk of dust leakage during disassembly. The external operation of the drive button 81 prevents the user from accessing the interior of the dust cup 1. The cooperation between the bracket 8 and the sliding groove ensures that the movement trajectory of the dust scraper 6 is stable and controllable, maintaining dust removal efficiency while improving operational safety.

[0040] The present invention further proposes that a handle 22 is provided on the main body housing 2 , and the handle 22 is provided corresponding to the movable groove 21 .

[0041] The handle 22 refers to a gripping component provided on the surface of the main body housing 2. Specifically, it can be integrally formed with the main body housing 2 through an injection molding process, or fixed to the surface of the main body housing 2 by bolts, and is used to provide grip support when operating the driving button 81. The corresponding arrangement of the movable groove 21 means that the extension direction of the movable groove 21 and the gripping direction of the handle 22 form a spatial matching relationship. Specifically, three-dimensional modeling can be used to determine that the axis of the movable groove 21 and the center line of the handle 22 are in the same vertical plane, so that the movement trajectory of the driving button 81 is consistent with the ergonomic gripping direction.

[0042] Specifically, when a user grips handle 22 and pushes drive button 81 to slide along movable groove 21, handle 22 acts as a fixed fulcrum to withstand the reaction force applied by the hand, keeping the thrust direction of drive button 81 parallel to the guiding direction of movable groove 21. The through-hole design of movable groove 21 allows the exposed portion of drive button 81 to move along a predetermined path. At the same time, the sliding groove of bracket 8 inside the main body housing 2 constrains the freedom of movement of the bracket foot, forming a dual guiding mechanism. This structure ensures that the dust scraper 6 maintains stable contact pressure during its sliding process on the outer wall of the filter screen 4, preventing the formation of a gap at the connection between the dust cup 1 and the main body housing 2 due to force deviation.

[0043] Through the above-mentioned technical solution, the present invention effectively solves the problem of dust 7 leakage caused by unstable force during operation. By optimizing the mechanical transmission path, the linearity and stability of the drive mechanism's movement are ensured, and seal failure caused by shaking of the main body housing 2 is avoided. The directional setting of the handle 22 reduces the amplitude of hand shaking during operation, allowing the dust scraper 6 to evenly scrape away attached matter along the axial direction of the filter screen 4, while maintaining the sealing connection between the dust cup 1 and the main body housing 2.

[0044] The present invention further proposes that a sliding groove (not shown in the figure) is provided on the inner wall of the main body shell, and the bracket foot of the bracket 8 can be slidably arranged in the sliding groove.

[0045] The sliding groove is a linear recessed structure extending along the inner wall of the main body housing 2. It can be formed by injection molding or machining, and its cross-sectional shape can be rectangular, trapezoidal, or dovetail. The sliding groove forms a mechanical guide constraint by defining the movement path of the bracket leg.

[0046] The bracket foot refers to a protruding structure extending from the bracket body, and can be made of metal or plastic material integrally formed with the bracket body 8. The size of the bracket foot forms a clearance fit with the width of the sliding groove, ensuring smooth sliding while limiting lateral deviation.

[0047] Specifically, when the drive mechanism moves bracket 8, the bracket foot is constrained within the sliding groove and moves along a predetermined trajectory. The sidewalls of the sliding groove generate sliding friction with the contact surface of the bracket foot, limiting the vertical displacement of bracket 8 through the geometry of the sliding groove. This rigid guide structure ensures that the scraper blade maintains parallel contact with the outer wall of the filter screen 4, preventing the formation of a gap between the scraper blade 6 and the filter screen 4 due to deviation of bracket 8. The length of the bracket foot and the sliding groove can be at least two-thirds of the total travel of the bracket, ensuring at least two points of contact during movement to maintain balance.

[0048] Through the above-mentioned technical solution, the present invention maintains stable contact pressure on the scraper blade 6 during movement, avoiding blind spots caused by the deviation of the bracket 8. The coordinated structure of the sliding groove and the bracket foot blocks the path for dust to leak through the gap between the bracket and the housing, while also reducing the lateral correction force required when manually operating the drive button, thereby increasing the impurity removal rate of a single scraping operation to over 95%.

[0049] The present invention further provides a mounting member 5 , which fixes the filter screen cover 4 to the main body housing 2 .

[0050] The mounting member 5 is a rigid connection component used to connect the filter screen cover 4 to the main body housing 2. Specifically, it can be implemented by a buckle, bolt, or a clamping structure, eliminating relative displacement between the filter screen cover 4 and the main body housing 2 through mechanical fixation. The fixation refers to the formation of an immovable rigid connection between the filter screen cover 4 and the main body housing 2. Specifically, it can be achieved by a locking structure or interference fit of the mounting member 5, thereby preventing the filter screen cover 4 from vibrating or deflecting when the dust cup 1 is removed or the dust scraper 6 slides.

[0051] Specifically, the mounting member 5 is configured to directly carry the load transfer between the filter screen cover 4 and the main body housing 2. When the vacuum motor 3 is running, the vibration energy of the filter screen cover 4 is transmitted to the main body housing 2 through the mounting member 5 and absorbed, thereby maintaining the positional stability of the filter screen cover 4. When the dust cup 1 is disassembled or the scraper blade 6 slides along the outer wall of the filter screen cover 4, the mounting member 5 prevents a gap from forming between the filter screen cover 4 and the main body housing 2 through a rigid connection, thereby preventing dust 7 from leaking from the connection. During the sliding process of the scraper blade 6, the fixing effect of the mounting member 5 ensures that the outer wall of the filter screen cover 4 always maintains contact pressure with the scraper blade 6, ensuring that the scraper blade 6 effectively scrapes off attached matter.

[0052] Through the above-mentioned technical solution, the present invention can eliminate relative displacement between the filter screen 4 and the main body housing 2, preventing dust 7 from leaking through the connection gap during cleaning operation, while ensuring stable contact between the dust scraper 6 and the outer wall of the filter screen 4, thereby improving dust removal efficiency. The rigid fixing effect of the mounting member 5 further suppresses the vibration amplitude of the filter screen 4 when the vacuum motor 3 is running, thereby reducing the risk of secondary dust entrainment caused by vibration.

[0053] The present invention further proposes that the dust cup 1 is detachably connected to the main body housing 2.

[0054] The detachable connection refers to the controlled separation and resetting of the dust cup 1 and the main body shell 2 through a mechanical coupling structure, which can be achieved by a snap, thread, or slide rail coupling structure. This connection method retains the relative movement function of the dust cup 1 and the main body shell 2, while restricting the movement range of the dust cup by physical limits, preventing it from completely separating from the main body shell 2.

[0055] Specifically, when the dust cup 1 is installed on the main body shell 2 through the detachable connection structure, an enclosed space is formed between its inner wall and the outer wall of the filter screen cover 4. When the user needs to clean the filter screen cover 4, it is only necessary to apply external force to the dust cup 1 along the preset direction to make the detachable connection structure enter the unlocked state. At this time, the dust cup 1 can perform limited displacement relative to the main body shell 2. During this process, the drive mechanism drives the scraper 6 to slide along the outer wall of the filter screen cover to remove the attached dust. Since the detachable connection structure constrains the displacement range of the dust cup 1, the dust cup 1 always maintains a partially connected state with the main body shell 2, and the dust accumulated inside cannot leak from the connection gap. After cleaning is completed, the dust cup is reset to its initial position through the detachable connection structure, and the complete sealing state with the main body shell is restored.

[0056] The above technical solution solves the problem of dust leakage when the dust cup 1 is separated from the main body housing 2. This ensures that the user does not need to completely disassemble the dust cup 1 when cleaning the filter cover, thereby preventing dust from contaminating the operating environment or the user's hands. At the same time, the detachable connection structure maintains the seal between the dust cup 1 and the main body housing 2, preventing secondary contamination and simplifying the cleaning process.

[0057] The present invention further proposes that the dust suction motor 3 is fixed in the main body housing 2 through a mounting member 5 .

[0058] The mounting member 5 is a structural component that connects the vacuum motor to the main body housing. Specifically, it can be implemented by a metal bracket with a clip or threaded hole. It forms a solid mechanical fixation between the vacuum motor 3 and the main body housing 2 through a rigid connection. The fixation refers to the immovable connection between the vacuum motor 3 and the main body housing 2 achieved by the mounting member. Specifically, it can be achieved by bolt fastening or slot engagement, ensuring that the vacuum motor 3 does not move due to vibration during operation.

[0059] Specifically, the mounting member 5 is designed as a support structure that matches the shape of the inner wall of the main unit housing 2. The dust motor 3 is inserted into the pre-set fixed position of the mounting member 5 via bolts or clips. When the dust motor 3 is activated, the mechanical vibration generated by it is absorbed by the rigid connection structure of the mounting member 5, preventing the vibration from being transmitted to the main unit housing 2 and causing the entire device to shake. Because the relative position between the dust motor 3 and the filter screen 4 is precisely fixed by the mounting member 5, the sliding path of the dust scraper 6 on the outer wall of the filter screen 4 is not deviated by the displacement of the dust motor 3, thus ensuring the stability of the dust removal action.

[0060] Through the above technical solution, the present invention realizes the stable installation of the dust suction motor 3 in the main body shell 2, avoids the unstable operation of the equipment caused by the vibration or displacement of the dust suction motor 3, and ensures the accurate sliding trajectory of the scraper 6 on the outer wall of the filter cover 4, thereby improving the dust removal effect and reducing the risk of secondary pollution caused by loose components.

[0061] The present invention further proposes that a dust suction port 11 is provided on the dust collecting cup 1 .

[0062] The dust suction port 11 is an opening structure provided on the surface of the dust cup 1. Specifically, it can be implemented in the form of a circular or rectangular hole. It can be located at the bottom or side wall of the dust cup 1 near the filter screen. This opening is used to form a directional airflow channel when the scraper blade 6 moves, so that the removed dust is guided into the dust cup 1 by negative pressure or gravity.

[0063] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which fall within the scope of protection of the present invention.

Claims

1. A dust scraping device for a filter screen cover of a cleaning machine, comprising a main body shell (2) and a dust collecting cup (1) connected to the main body shell (2), wherein a dust collecting motor (3) is provided in the main body shell (2), and a filter screen cover (4) is provided outside the dust collecting motor (3), characterized in that: The dust collecting cup (1) is covered on the outside of the filter screen cover (4); a scraper blade (6) is slidably provided between the inner wall of the dust collecting cup (1) and the outer wall of the filter screen cover (4); the scraper blade (6) is driven by a driving mechanism to slide between the inner wall of the dust collecting cup (1) and the outer wall of the filter screen cover (4) along the axial direction of the dust collecting cup to remove dust (7) on the outer wall of the filter screen cover (4).

2. The dust scraping device for a filter screen of a cleaning machine according to claim 1, characterized in that: The scraper blade (6) is in a ring shape and is sleeved on the outer periphery of the filter screen cover (4).

3. The dust scraping device for the filter screen of a cleaning machine according to claim 2, characterized in that: The driving mechanism comprises a bracket (8) arranged in a main body shell (2), a driving button (81) being fixedly connected to the bracket (8), a movable groove (21) being horizontally provided on the main body shell (2) at the front and rear sides, the movable groove (21) being arranged through the outer wall of the main body shell (2), the driving button (81) extending out of the movable groove (21), and the scraper blade (6) being arranged on the bracket (8).

4. The dust scraping device for the filter screen of a cleaning machine according to claim 3, characterized in that: The main body housing (2) is provided with a handle (22), and the handle (22) is arranged corresponding to the movable groove (21).

5. The dust scraping device for the filter screen of a cleaning machine according to claim 4, characterized in that: A sliding groove is provided on the inner wall of the main body housing (2), and the bracket foot of the bracket (8) can be slidably arranged in the sliding groove.

6. A dust scraping device for a filter screen of a cleaning machine according to any one of claims 1 to 5, characterized in that: It also includes a mounting member (5), which fixes the filter screen cover (4) on the main body housing (2).

7. The dust scraping device for a filter screen of a cleaning machine according to claim 5, characterized in that: The dust collecting cup (1) is detachably connected to the main body housing (2).

8. The dust scraping device for a filter screen of a cleaning machine according to claim 5, characterized in that: The dust suction motor (3) is fixed in the main machine housing (2) via a mounting member (5).

9. The dust scraping device for a filter screen of a cleaning machine according to claim 5, characterized in that: The dust collecting cup (1) is provided with a dust suction port (11).

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