A self-cleaning filter structure for a vacuum cleaner

Abstract

This invention discloses a self-cleaning filter structure for a vacuum cleaner, comprising: a filter assembly including a filter support and a filter, the filter being sleeved on the filter support; the filter support including a first positioning ring, a filter support frame, and a first mounting base, the first mounting base having a locking part; a scraper assembly rotatably sleeved on the filter and filter support, including a second positioning ring, a second mounting base, and a plurality of scrapers disposed between the second positioning ring and the second mounting base; the second positioning ring being sleeved on the first positioning ring; the second mounting base being fitted onto the first mounting base; the scrapers being in close contact with the outer surface of the filter; and a fastener, which passes through the mounting hole of the second mounting base and is locked and positioned within the locking opening of the locking part. This invention can solve the problem that existing vacuum cleaner filters cannot meet the requirements for convenient, efficient, and environmentally friendly filter self-cleaning.

Description

Technical Field

[0001] This invention relates to the field of vacuum cleaner technology, specifically to a self-cleaning filter structure for a vacuum cleaner. Background Technology

[0002] Vacuum cleaners can be classified into upright, canister, and portable types according to their structure. The working principle of a vacuum cleaner is that the motor drives the blades to rotate at high speed, creating negative air pressure in the sealed housing to suck up dust and debris. The dust and debris are then intercepted and collected by the filter, and the purified air is discharged. Vacuum cleaners are mainly divided into three types: household vacuum cleaners, commercial vacuum cleaners, and industrial vacuum cleaners.

[0003] Currently, with the development of the vacuum cleaner industry, basic functions such as dust collection, filtration, and airflow diversion, as well as corresponding designs and products, are relatively mature. Extended functions such as ease of disassembly and storage are also constantly being optimized and improved. However, the design of existing vacuum cleaners regarding the ease of cleaning the filter structure still has many obvious shortcomings:

[0004] ① Some products require complete disassembly of the dust cup and removal of the filter structure for manual or additional equipment cleaning, which is less efficient;

[0005] ② Some vacuum cleaners use an internal drive mechanism or an extension to the outside of the vacuum cleaner to drive the corresponding cleaning components, thus achieving the self-cleaning function inside the vacuum cleaner. However, the cleaning components have a relatively simple way of cleaning the filter, resulting in low cleaning efficiency and quality, and require additional energy consumption, which cannot meet the demand for convenient and green filter self-cleaning. Summary of the Invention

[0006] The purpose of this invention is to provide a self-cleaning filter structure for vacuum cleaners, in order to solve the problem that existing vacuum cleaner filters cannot meet the requirements for convenient, efficient, and environmentally friendly self-cleaning.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a self-cleaning filter structure for a vacuum cleaner, comprising:

[0008] A filter assembly includes a filter support and a filter, wherein the filter is sleeved on the filter support;

[0009] The filter support includes a first positioning ring, a filter support frame, and a first mounting base, wherein a locking part is provided on the first mounting base;

[0010] The scraper assembly, which is rotatably sleeved on the filter screen and the filter screen support, includes a second positioning ring, a second mounting base, and a plurality of scrapers disposed between the second positioning ring and the second mounting base;

[0011] The second positioning ring is sleeved on the first positioning ring;

[0012] The second mounting base is assembled onto the first mounting base;

[0013] The scraper blade is in close contact with the outer surface of the filter screen;

[0014] Fasteners are inserted into the mounting holes of the second mounting base and locked in the locking opening of the locking part.

[0015] As a further description of the above technical solution:

[0016] Both the filter assembly and the scraper assembly have a conical structure.

[0017] The filter support frame includes a third positioning ring disposed at the top of the first positioning ring, a fourth positioning ring disposed at the bottom of the first mounting base, and a support rod connecting the third positioning ring and the fourth positioning ring.

[0018] The tilt angles of the third positioning ring, the support rod, and the fourth positioning ring increase sequentially.

[0019] The bottom and top of the filter screen are seamlessly fitted onto the third and fourth positioning rings, respectively.

[0020] As a further description of the above technical solution:

[0021] The scraper blades are arranged in a spiral shape between the second positioning ring and the second mounting base.

[0022] As a further description of the above technical solution:

[0023] A bearing is installed in the mounting hole, and the fastener passes through the bearing.

[0024] As a further description of the above technical solution:

[0025] The scraper blade has a continuous groove along its side, and a counterweight slider is slidably connected to the groove.

[0026] An elastic scraper strip is connected between the counterweight sliders of adjacent scraper blades.

[0027] As a further description of the above technical solution:

[0028] The counterweight slider includes an inner slider and a support block, and the inner slider has a spherical structure.

[0029] The inner slider is correspondingly slidably disposed within the spherical groove;

[0030] The support block is elastically supported on the outside of the slide groove.

[0031] As a further description of the above technical solution:

[0032] A first tapping component is provided outside the scraper assembly;

[0033] The first striking assembly includes a first hinge segment and a first striking rod and a linkage block at the end of the first hinge segment;

[0034] The first hinge segment is hinged to the first hinge seat of the second positioning ring via a first hinge shaft;

[0035] The first striking bar extends into the scraper assembly;

[0036] The angle between the first striking rod and the first hinge segment is smaller than the angle between the generatrix of the cone formed by the second positioning ring and several scrapers;

[0037] The first positioning ring is provided with a ring-shaped structure corresponding to the linkage block.

[0038] As a further description of the above technical solution:

[0039] The ring structure is a toothed ring;

[0040] The inner end face of the linkage block is provided with a linkage notch;

[0041] The linkage notch extends toward the first hinge seat and has a clearance opening;

[0042] The side of the linkage notch extends to a wedge-shaped or arc-shaped receiving surface corresponding to the circular toothed ring.

[0043] As a further description of the above technical solution:

[0044] A second tapping component is provided inside the filter support;

[0045] The second striking assembly includes a second hinge section and a second striking rod near one end of the second hinge section of the filter screen;

[0046] The second hinge segment is hinged to the second hinge seat of the first positioning ring via a second hinge shaft;

[0047] The second tapping bar extends to the inner surface of the filter screen;

[0048] The angle between the second hinge segment and the second striking rod is greater than the angle between the first positioning ring and the generatrix of the filter support frame;

[0049] The second tapping component is provided with magnets, and several magnets are arranged at intervals along the circumference of the second positioning ring.

[0050] As a further description of the above technical solution:

[0051] A buffer pad is provided between the first positioning ring and the inner surface of the second hinge segment.

[0052] In summary, due to the adoption of the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0053] 1. The self-cleaning filter structure of the vacuum cleaner of the present invention fully fits and shapes the filter through a sandwich structure consisting of a filter support, a filter, and a scraper assembly, ensuring no gaps at the connection with adjacent structures and guaranteeing a stable dust filtration effect. The filter support and the scraper assembly are joined and locked together by fasteners. The scraper assembly can rotate freely on the filter to scrape and self-clean the dust trapped on its outer surface. It is driven by the main airflow formed outside the filter structure when the vacuum cleaner is in use, achieving rotation drive without additional energy consumption. This design enables dust filtration and filter cleaning to be carried out simultaneously, reducing the degree of filter clogging, ensuring high-efficiency filtration, and greatly reducing the frequency of manual filter cleaning through the self-cleaning function.

[0054] 2. Based on the scraper assembly, a counterweight slider and elastic scraper are designed to achieve a bidirectional scraping structure on the filter screen, improving the coverage of dust and hair removal. When the scraper assembly rotates, the counterweight slider slides along the groove due to centrifugal force. The elastic scraper adjusts its length adaptively based on the positions of the counterweight sliders at both ends, scraping away dust and hair on the filter screen along the movement path, causing them to clump together, detach from the filter, and settle and collect under the influence of airflow and gravity. This design is primarily effective when airflow velocity changes, such as during periods of frequent and significant internal negative pressure changes when the vacuum cleaner is turned on or off. This achieves self-cleaning before and after use, preventing dirt residue on the filter screen before use that could lead to poor filtration, and preventing dirt residue after use that could seep into the filter screen when the vacuum cleaner is idle, affecting subsequent use.

[0055] 3. When the scraper assembly and the filter support rotate relative to each other, the teeth and grooves of the toothed ring can push the linkage block and perform a non-contact alternating action, causing the first striking rod to rotate towards the filter. With the help of centrifugal force or the torsion spring set at the hinge of the first striking assembly, the first striking rod rotates away from the filter, realizing the reciprocating beating of the filter, and dust and hair are knocked out and removed from the filter. The second striking assembly rotates away from the filter due to gravity or the torsion spring at the hinge. When the magnet on the second positioning ring rotates, its magnetic attraction with the magnet on the second striking assembly causes the second striking assembly to rotate towards the filter, realizing the beating and dust removal effect on its inner surface.

[0056] 4. The airflow drives the scraper assembly to rotate, scraping and combing the dust and hair in the horizontal direction of the filter screen. Simultaneously, the counterweight slider drives the elastic scraper to slide vertically, realizing bidirectional self-cleaning and combing of dust and hair on the filter screen. The two tapping components are designed to tap out and remove the dust embedded in the filter screen holes. This achieves green and three-dimensional cleaning of the filter screen without additional energy consumption, ensuring the efficient self-cleaning function of the filter screen. Attached Figure Description

[0057] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0058] Figure 1 This is a schematic diagram of one embodiment of a self-cleaning combing filter structure for a vacuum cleaner.

[0059] Figure 2 An exploded view of one embodiment of a self-cleaning comb filter structure for a vacuum cleaner.

[0060] Figure 3 This is a top view of another embodiment of a self-cleaning comb filter structure for a vacuum cleaner in its normal state.

[0061] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0062] Figure 5 This is a top view of another embodiment of a self-cleaning comb filter structure for a vacuum cleaner in use.

[0063] Figure 6 Cross-sectional view of another embodiment of a self-cleaning comb filter structure for a vacuum cleaner in use. Figure 1 .

[0064] Figure 7 for Figure 6 Enlarged view of point B in the middle.

[0065] Figure 8 Cross-sectional view of another embodiment of a self-cleaning comb filter structure for a vacuum cleaner in another usage state. Figure 1 .

[0066] Figure 9 Cross-sectional view of another embodiment of a self-cleaning comb filter structure for a vacuum cleaner in use. Figure 2 .

[0067] Figure 10 Cross-sectional view of another embodiment of a self-cleaning comb filter structure for a vacuum cleaner in another usage state. Figure 2 .

[0068] Legend:

[0069] 1. Filter screen bracket; 11. First positioning ring; 111. Second hinge seat; 112. Second hinge shaft; 113. Buffer pad; 12. Filter screen support frame; 121. Third positioning ring; 122. Support rod; 123. Fourth positioning ring; 13. First mounting seat; 131. Locking port; 132. Locking part;

[0070] 2. Filter screen;

[0071] 3. Scraper assembly; 31. Second positioning ring; 311. First hinge seat; 312. First hinge shaft; 32. Scraper; 321. Slide groove; 33. Second mounting seat; 331. Mounting hole;

[0072] 4. Fasteners; 5. Bearings;

[0073] 6. Counterweight slider; 61. Inner slider; 62. Support block;

[0074] 7. Flexible scraper strip;

[0075] 8. First striking component; 81. First hinge section; 82. First striking rod; 83. Linkage block; 831. Linkage notch; 832. Clearance opening; 833. Bearing surface;

[0076] 9. Ring structure;

[0077] 10. Second striking assembly; 101. Second hinge section; 102. Second striking rod. Detailed Implementation

[0078] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0079] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0080] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0081] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0082] In the description of the embodiments of the present invention, it should be noted that the terms "upper" and "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0083] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0084] Example 1:

[0085] Please see Figure 1-2 This invention provides a technical solution: a self-cleaning filter structure for a vacuum cleaner, comprising:

[0086] A filter assembly includes a filter support 1 and a filter 2, wherein the filter 2 is sleeved on the filter support 1;

[0087] The filter support 1 includes a first positioning ring 11, a filter support frame 12, and a first mounting base 13;

[0088] A locking part 132 is provided on the first mounting base 13;

[0089] The scraper assembly 3 is rotatably sleeved on the filter screen 2 and the filter screen support 1, and includes a second positioning ring 31, a second mounting base 33, and a plurality of scraper blades 32 disposed between the second positioning ring 31 and the second mounting base 33.

[0090] The second positioning ring 31 is sleeved on the first positioning ring 11;

[0091] The second mounting base 33 is assembled onto the first mounting base 13;

[0092] The scraper 32 is in close contact with the outer surface of the filter screen 2;

[0093] In this embodiment, the filter screen 2 is made of a wear-resistant material;

[0094] Fastener 4 passes through the mounting hole 331 of the second mounting base 33 and is locked and positioned within the locking opening 131 of the locking part 132. The locking and positioning method adopts an insertion snap-fit ​​or screw connection.

[0095] This embodiment of a vacuum cleaner's self-cleaning filter structure utilizes a sandwich structure comprised of a filter support 1, a filter 2, and a scraper assembly 3 to fully fit and shape the filter 2, ensuring no gaps at its connection with adjacent structures and guaranteeing a stable dust filtration effect. The filter support 1 and the scraper assembly 3 are joined and locked together by fasteners 4. The scraper assembly 3 can rotate freely on the filter 2, scraping and self-cleaning the dust trapped on its outer surface. Its rotation is driven by the airflow generated outside the filter structure during vacuum cleaner use, requiring no additional energy consumption. This design allows for simultaneous dust filtration and filter cleaning, reducing filter clogging, ensuring efficient filtration, and significantly reducing the frequency of manual filter cleaning through its self-cleaning function.

[0096] In this embodiment, both the filter assembly and the scraper assembly 3 are conical structures, thereby improving the air intake and filtration efficiency of the filter structure and ensuring high filtration efficiency, low airflow resistance, and stability.

[0097] The filter support frame 12 includes a third positioning ring 121 disposed on the top of the first positioning ring 11, a fourth positioning ring 123 disposed on the bottom of the first mounting base 13, and a support rod 122 connecting the third positioning ring 121 and the fourth positioning ring 123; the support rod 122 provides sufficient inner support for the filter 2.

[0098] The inclination angles of the third positioning ring 121, support rod 122, and fourth positioning ring 123 increase sequentially. The bottom and top of the filter screen 2 are seamlessly spliced ​​onto the third positioning ring 121 and fourth positioning ring 123, respectively. This design requires corresponding slope cutting processing on the inner sides of the top and bottom surfaces of the filter screen 2 to form a V-shaped cross-section structure at its end face, ensuring a tight fit and avoiding air leakage at the splice and interference between the filter screen and other structures, thus guaranteeing the filtration quality of the filter screen 2.

[0099] The scraper blade 32 is spirally arranged between the second positioning ring 31 and the second mounting base 33. In addition, in order to further improve the stability of the thrust generated by the airflow on the scraper blade assembly 3 and the conversion rate of the torque generated by the airflow on the scraper blade assembly 3 to its rotation speed, the surface of the scraper blade 32 is designed with a corresponding flow guiding structure based on the flow direction of the main airflow obtained by simulation and calculation.

[0100] A bearing 5 is installed in the mounting hole 331, and the fastener 4 passes through the bearing 5 to improve the rotation of the scraper assembly 3 on the filter screen 2 and the self-cleaning rate of dust.

[0101] The working principle of the self-cleaning combing filter structure of a vacuum cleaner in this embodiment is as follows: When the vacuum cleaner starts running, an airflow is formed at the filter structure from the scraper assembly 3 toward the filter support 1. When the airflow flows tangentially through the scraper assembly 3, it will generate a tangential thrust on the scraper 32, causing the scraper assembly 3 to rotate along the same axis as the filter 2. While collecting and filtering dust, it scrapes and self-cleans the dust and hair trapped on its outer surface, thereby ensuring the high-efficiency filtration of the filter 2.

[0102] Example 2:

[0103] Please see Figure 3-5 Based on the above embodiment 1, by scraping the filter screen 2 in the horizontal direction, the scraping direction is unidirectional, and a certain amount of dust and hair residue will be formed on the uneven structure of the filter screen 2 surface. Therefore, it is planned to design a bidirectional scraping structure to improve the coverage of dust and hair cleaning. Preferably, the scraper blade 32 is provided with a sliding groove 321 along its entire side, and a counterweight slider 6 is slidably connected to the sliding groove 321.

[0104] An elastic scraper 7 is connected between the counterweight sliders 6 of adjacent scraper blades 32. This design, through the rotational movement of the scraper assembly 3, based on centrifugal force, enables the counterweight sliders 6 to slide synchronously on the slide groove 321, achieving bidirectional filter scraping and self-cleaning without additional energy consumption.

[0105] The counterweight slider 6 includes an inner slider 61 and a support block 62;

[0106] The inner slider 61 has a spherical structure and is slidably disposed in the spherical groove 321, thereby reducing the sliding resistance between the two and improving the sliding stability and flexibility of the counterweight slider 6, and ensuring the efficient operation of the bidirectional filter self-cleaning structure.

[0107] The support block 62 is elastically supported on the outside of the slide groove 321. This design can be combined with the spherical sliding structure of the counterweight slider 6 and the slide groove 321 to achieve more flexible sliding and vertical scraping of the filter screen 2 under the influence of airflow on the counterweight slider 6 and the elastic scraper 7.

[0108] The working principle of the self-cleaning filter structure of a vacuum cleaner in this embodiment is as follows: When the scraper assembly 3 rotates, the counterweight slider 6 slides along the groove due to the centrifugal force of rotation. The elastic scraper 7 adjusts its length adaptively based on the position of the counterweight sliders 6 at both ends, and scrapes the dust and hair on the filter screen along the moving path, causing them to clump together and detach from the filter screen 2, where they settle and are collected by airflow and gravity. This design mainly functions when the airflow velocity changes, such as when the vacuum cleaner is turned on or off, and when there are frequent and large changes in the internal negative pressure. This achieves self-cleaning before and after use, avoiding poor filtration due to dirt residue on the filter screen before use, and preventing dirt residue after use from seeping into the filter screen when the vacuum cleaner is idle, affecting subsequent use.

[0109] Example 3:

[0110] Please see Figure 6-8 Based on the above embodiment 1, in addition to the scraping structure on the surface of the filter screen 2, dust and hair will be embedded in the filter screen 2 after being guided by airflow, filtered and trapped by the filter screen 2. Therefore, it is necessary to perform dust removal treatment in the direction of the filter screen. Preferably, a first tapping component 8 is provided outside the scraper assembly 3. The first tapping component 8 includes a first hinge section 81 and a first tapping rod 82 and a linkage block 83 at the end of the first hinge section 81.

[0111] The first hinge segment 81 is hinged to the first hinge seat 311 of the second positioning ring 31 via the first hinge shaft 312;

[0112] The first tapping rod 82 extends into the scraper assembly 3. The angle between the first tapping rod 82 and the first hinge section 81 is smaller than the angle between the generatrix of the cone formed by the second positioning ring 31 and the plurality of scrapers 32. The above design allows the first tapping assembly 8 to move in the normal direction of the filter screen 2, thereby enabling the filter screen 2 to be tapped. This causes the filter screen outside the tapping area to be affected by vibration, thus completing the tapping and removal of dust and hair.

[0113] Next, the design of the state switching drive device for the first tapping component 8 is carried out, and the first positioning ring 11 is provided with a ring structure 9 corresponding to the linkage block 83;

[0114] The annular structure 9 is a toothed ring, and the inner end face of the linkage block 83 is provided with a linkage notch 831.

[0115] The above structure allows the teeth and grooves of the toothed ring to push and alternately act on the linkage block 83 without contact when the scraper assembly 3 and the filter support 1 rotate relative to each other. This causes the first striking rod 82 to rotate toward the filter 2. Combined with centrifugal force or the torsion spring set at the hinge of the first striking assembly 8, the first striking rod 82 rotates away from the filter 2, realizing the reciprocating beating of the filter 2. Dust and hair are knocked off and removed from the filter 2.

[0116] The linkage notch 831 extends toward the first hinge seat 311 and has a clearance 832 to avoid interference with other components when the first striking component 8 rotates.

[0117] The linkage notch 831 has a wedge-shaped or arc-shaped bearing surface 833 extending from its side, which corresponds to the circular tooth ring, thereby improving the bearing stability between the teeth of the circular tooth ring and the linkage block 83.

[0118] Example 4:

[0119] Please see Figure 9-10 Based on the above embodiment 1, similar to the beating mechanism of the outer surface of the filter screen 2 in embodiment 3, the design of beating and cleaning the inner surface is carried out. Preferably, a second beating component 10 is provided in the filter screen support 1. The second beating component 10 includes a second hinge section 101 and a second beating rod 102 near one end of the second hinge section 101 near the filter screen 2.

[0120] The second hinge segment 101 is hinged to the second hinge seat 111 of the first positioning ring 11 via the second hinge shaft 112;

[0121] The second striking rod 102 extends to the inner surface of the filter screen 2, and the angle between the second hinge section 101 and the second striking rod 102 is greater than the angle between the first positioning ring 11 and the generatrix of the filter screen support frame 12.

[0122] Magnets are provided on the second tapping component 10, and several magnets are arranged at intervals along the circumference of the second positioning ring 31.

[0123] When the above structure is in use, the second tapping component 10 rotates away from the filter screen 2 under the action of gravity or the torsion spring at the hinge. When the magnet on the second positioning ring 31 rotates, it is magnetically attracted to the magnet on the second tapping component 10, causing the second tapping component 10 to rotate toward the filter screen 2, thereby achieving the tapping and dust removal effect on its inner surface.

[0124] A buffer pad 113 is provided between the first positioning ring 11 and the inner surface of the second hinge section 101 to reduce the collision between the tapping component and other structures when it moves. This structure can also be applied to the corresponding structure in Embodiment 3 to reduce structural strength loss and enable the filter 2 to operate efficiently for a long time.

[0125] When the designs of the above four embodiments are integrated, the working principle of the self-cleaning comb filter structure of a vacuum cleaner is as follows: When the vacuum cleaner starts running, an airflow is formed at the filter structure from the scraper assembly 3 toward the filter support 1. When the airflow flows tangentially through the scraper assembly 3, it will generate a tangential thrust on the scraper 32, causing the scraper assembly 3 to rotate along the same axis as the filter 2. While collecting and filtering dust, it scrapes and self-cleans the dust and hair trapped on its outer surface, thereby ensuring the high-efficiency filtration of the filter 2.

[0126] During operation, as the scraper assembly 3 rotates, the counterweight slider 6 is subjected to centrifugal force and slides along the groove. The elastic scraper 7 adjusts its length adaptively based on the positions of the counterweight sliders 6 at both ends, scraping away dust and hair on the filter screen along the movement path, causing them to clump together, detach from the filter screen 2, and settle and collect under the influence of airflow and gravity. This design is primarily effective when airflow velocity changes, such as when the vacuum cleaner is turned on or off, and when there are frequent and significant changes in internal negative pressure. This achieves self-cleaning before and after use, preventing dirt residue on the filter screen from causing poor filtration before use and preventing dirt residue from seeping into the filter screen when the vacuum cleaner is idle, thus affecting subsequent use.

[0127] When the scraper assembly 3 and the filter support 1 rotate relative to each other, the teeth and grooves of the toothed ring can push the linkage block 83 and perform a non-contact alternating action, causing the first tapping rod 82 to rotate toward the filter 2. Combined with centrifugal force or the torsion spring set at the hinge of the first tapping assembly 8, the first tapping rod 82 rotates away from the filter 2, realizing the reciprocating tapping of the filter 2, and dust and hair are tapped and removed from the filter 2.

[0128] The second tapping component 10 rotates away from the filter screen 2 under the action of gravity or the torsion spring at the hinge. When the magnet on the second positioning ring 31 rotates, it is magnetically attracted to the magnet on the second tapping component 10, causing the second tapping component 10 to rotate toward the filter screen 2, thereby achieving the tapping and dust removal effect on its inner surface.

[0129] The airflow drives the scraper assembly 3 to rotate, scraping and combing the dust and hair in the horizontal direction of the filter screen 2. Simultaneously, the counterweight slider 6 drives the elastic scraper 7 to slide vertically, realizing the bidirectional self-cleaning and combing of dust and hair in the filter screen 2. The two tapping components are designed to tap out and remove the dust embedded in the filter screen holes, thereby realizing three-dimensional cleaning of the filter screen 2 and ensuring the efficient self-cleaning function of the filter screen.

[0130] In summary, due to the adoption of the above technical solution, the self-cleaning filter structure of the vacuum cleaner in this embodiment has the following advantages compared with the prior art:

[0131] 1. The self-cleaning filter structure of the vacuum cleaner of the present invention fully fits and shapes the filter through a sandwich structure consisting of a filter support, a filter, and a scraper assembly, ensuring no gaps at the connection with adjacent structures and guaranteeing a stable dust filtration effect. The filter support and the scraper assembly are joined and locked together by fasteners. The scraper assembly can rotate freely on the filter to scrape and self-clean the dust trapped on its outer surface. It is driven by the main airflow formed outside the filter structure when the vacuum cleaner is in use, achieving rotation drive without additional energy consumption. This design enables dust filtration and filter cleaning to be carried out simultaneously, reducing the degree of filter clogging, ensuring high-efficiency filtration, and greatly reducing the frequency of manual filter cleaning through the self-cleaning function.

[0132] 2. Based on the scraper assembly, a counterweight slider and elastic scraper are designed to achieve a bidirectional scraping structure on the filter screen, improving the coverage of dust and hair removal. When the scraper assembly rotates, the counterweight slider slides along the groove due to centrifugal force. The elastic scraper adjusts its length adaptively based on the positions of the counterweight sliders at both ends, scraping away dust and hair on the filter screen along the movement path, causing them to clump together, detach from the filter, and settle and collect under the influence of airflow and gravity. This design is primarily effective when airflow velocity changes, such as during periods of frequent and significant internal negative pressure changes when the vacuum cleaner is turned on or off. This achieves self-cleaning before and after use, preventing dirt residue on the filter screen before use that could lead to poor filtration, and preventing dirt residue after use that could seep into the filter screen when the vacuum cleaner is idle, affecting subsequent use.

[0133] 3. When the scraper assembly and the filter support rotate relative to each other, the teeth and grooves of the toothed ring can push the linkage block and perform a non-contact alternating action, causing the first striking rod to rotate towards the filter. With the help of centrifugal force or the torsion spring set at the hinge of the first striking assembly, the first striking rod rotates away from the filter, realizing the reciprocating beating of the filter, and dust and hair are knocked out and removed from the filter. The second striking assembly rotates away from the filter due to gravity or the torsion spring at the hinge. When the magnet on the second positioning ring rotates, its magnetic attraction with the magnet on the second striking assembly causes the second striking assembly to rotate towards the filter, realizing the beating and dust removal effect on its inner surface.

[0134] 4. The airflow drives the scraper assembly to rotate, scraping and combing the dust and hair in the horizontal direction of the filter screen. Simultaneously, the counterweight slider drives the elastic scraper to slide vertically, realizing bidirectional self-cleaning and combing of dust and hair on the filter screen. The two tapping components are designed to tap out and remove the dust embedded in the filter screen holes. This achieves green and three-dimensional cleaning of the filter screen without additional energy consumption, ensuring the efficient self-cleaning function of the filter screen.

[0135] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A self-cleaning filter structure for a vacuum cleaner, characterized in that, include: A filter assembly includes a filter support and a filter, wherein the filter is sleeved on the filter support, and the filter support includes a first positioning ring, a filter support frame and a first mounting base, wherein a locking part is provided on the first mounting base; The scraper assembly, which is rotatably sleeved on the filter screen and the filter screen support, includes a second positioning ring, a second mounting base, and a plurality of scrapers disposed between the second positioning ring and the second mounting base. The second positioning ring is sleeved on the first positioning ring, the second mounting base is assembled on the first mounting base, and the scrapers are in close contact with the outer surface of the filter screen. Fasteners, which pass through the mounting holes of the second mounting base and are locked and positioned within the locking opening of the locking part; The scraper assembly is externally provided with a first tapping assembly. The first tapping assembly includes a first hinge segment, a first tapping rod at the end of the first hinge segment, and a linkage block. The first hinge segment is hinged to the first hinge seat of the second positioning ring via a first hinge shaft. The movement range of the first tapping rod extends into the scraper assembly. The angle between the first tapping rod and the first hinge segment is smaller than the generatrix angle between the second positioning ring and the cone formed by several scrapers. The first positioning ring is provided with a ring-shaped structure corresponding to the linkage block. The ring structure is a toothed ring, the inner end face of the linkage block is provided with a linkage notch, the linkage notch extends toward the first hinge seat with a clearance opening, and the side of the linkage notch extends with a wedge-shaped or arc-shaped receiving surface corresponding to the toothed ring. A second tapping assembly is provided inside the filter support. The second tapping assembly includes a second hinge section and a second tapping rod near one end of the second hinge section of the filter. The second hinge section is hinged to the second hinge seat of the first positioning ring via a second hinge shaft. The movement range of the second tapping rod extends to the inner surface of the filter. The angle between the second hinge section and the second tapping rod is greater than the angle between the generatrix of the first positioning ring and the filter support frame. Magnets are provided on the second tapping assembly, and a plurality of magnets are spaced apart along the circumference of the second positioning ring.

2. The self-cleaning comb filter structure for a vacuum cleaner according to claim 1, characterized in that, The filter assembly and scraper assembly are both conical structures. The filter support frame includes a third positioning ring disposed at the top of the first positioning ring, a fourth positioning ring disposed at the bottom of the first mounting base, and a support rod connecting the third positioning ring and the fourth positioning ring. The inclination angles of the third positioning ring, the support rod, and the fourth positioning ring increase sequentially. The bottom and top of the filter are seamlessly spliced ​​onto the third positioning ring and the fourth positioning ring, respectively.

3. The self-cleaning combing filter structure for a vacuum cleaner according to claim 1, characterized in that, The scraper blades are arranged in a spiral shape between the second positioning ring and the second mounting base.

4. The self-cleaning combing filter structure for a vacuum cleaner according to claim 1, characterized in that, A bearing is installed in the mounting hole, and the fastener passes through the bearing.

5. The self-cleaning combing filter structure for a vacuum cleaner according to claim 1, characterized in that, The scraper blade has a continuous groove along its side, and a counterweight slider is slidably connected to the groove. An elastic scraper strip is connected between the counterweight sliders of adjacent scraper blades.

6. The self-cleaning combing filter structure for a vacuum cleaner according to claim 5, characterized in that, The counterweight slider includes an inner slider and a support block. The inner slider has a spherical structure and is slidably disposed in the spherical groove. The support block is elastically supported on the outside of the groove.

7. The self-cleaning combing filter structure for a vacuum cleaner according to claim 1, characterized in that, A buffer pad is provided between the first positioning ring and the inner surface of the second hinge segment.

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