Dust collector filter element mounting structure

Abstract

The utility model relates to the field of dust collectors, in particular to a dust collector filter element mounting structure. A dust collector filter element mounting structure comprises a dust collector bottom cover basket and an HEPA filter element. A bottom cover basket HEPA filter element mounting hanging hole is formed in the dust collector bottom cover basket; an HEPA filter element bottom hole is formed in the HEPA filter element; the knob assembly is used for mounting the HEPA filter element on a bottom cover basket of the dust collector; the knob assembly comprises a knob linkage sleeve and a knob body for a user to rotate; the knob body is installed on the knob linkage sleeve in a threaded screwing mode, and the axial relative position of the knob linkage sleeve and the knob body is adjusted in a threaded screwing mode. The knob linkage sleeve is provided with a plurality of elastic expansion claws; the elastic expansion claw comprises a clamping hook, an elastic arm and an expansion contact. The beneficial effects of the utility model are that the installation is time-saving and labor-saving through a thread rotation mode; the distance deviation between the bottom cover basket of the dust collector and the HEPA filter element is overcome, and the HEPA filter element is easily locked.

Description

Technical Field

[0001] The utility model relates to the field of vacuum cleaners, in particular to a filter element mounting structure for vacuum cleaners. Background Art

[0002] Traditional vacuum cleaner filter element installation usually involves passing a knob through the mounting hole on the HEPA filter element and the mounting hole on the vacuum cleaner bottom cover basket and then rotating it so that the anti-slip bump on the knob separates circumferentially from the groove on the vacuum cleaner bottom cover basket. The anti-slip bump is then used to hook onto the opening of the mounting hole on the vacuum cleaner bottom cover basket to achieve the installation of the HEPA filter element.

[0003] However, in actual production, due to processing errors and assembly errors, there is a deviation in the distance between the vacuum cleaner bottom cover basket and the HEPA filter element. When the distance becomes larger, the knob is difficult to install and lock, while when the distance is smaller, the knob is loose and the fixing effect is poor. Utility Model Content

[0004] The purpose of the present utility model is to provide a vacuum cleaner filter element installation structure to solve the problems raised in the above background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] The filter element of the vacuum cleaner is installed in a manner that the user can rotate the filter element to the bottom of the vacuum cleaner. The filter element of the vacuum cleaner is installed in a manner that the user can rotate the filter element to the bottom of the vacuum cleaner. The filter element of the vacuum cleaner is installed in a manner that the user can rotate the filter element to the bottom of the vacuum cleaner. The filter element of the vacuum cleaner is installed in a manner that the user can rotate the filter element to the bottom of the vacuum cleaner. The filter element of the vacuum cleaner is installed in a manner that the user can rotate the filter element to the bottom of the vacuum cleaner. The filter element of the vacuum cleaner is installed in a manner that the user can rotate the filter element to the bottom of the vacuum cleaner. The filter element of the vacuum cleaner is installed in a manner that the user can rotate the filter element to the bottom of the vacuum cleaner. The filter element of the vacuum cleaner is installed in a manner that the user can rotate the filter element to the bottom of the vacuum cleaner. The filter element of the vacuum cleaner is installed in a manner that the user can rotate the filter element to the bottom of the vacuum cleaner. The filter element of the vacuum cleaner is installed in a manner that the user can rotate the filter element to the bottom of the vacuum cleaner. The filter element of the vacuum cleaner is installed in a manner that the user can rotate the filter element to the bottom of the vacuum cleaner.

[0007] When the knob linkage sleeve is screwed in along the knob body thread, the lower cone column abuts against the expansion contact, causing the elastic arm to elastically deform and the cara hook to move radially outward to hook the opening of the bottom cover basket HEPA filter element installation hanging hole; the whole formed by the knob body and the knob linkage sleeve passes through the bottom cover basket HEPA filter element installation hanging hole and the HEPA filter element bottom hole, and the knob body and the cara hook of the elastic expansion claw lock the vacuum cleaner bottom cover basket and HEPA filter element into a whole from both sides.

[0008] As a further solution of the present invention: the knob linkage sleeve is provided with a knob linkage sleeve anti-rotation structure; the hole wall of the bottom hole of the HEPA filter element is provided with a lower hole wall anti-rotation structure which cooperates with the knob linkage sleeve anti-rotation structure to prevent the knob linkage sleeve from rotating relative to the bottom hole of the HEPA filter element; the knob linkage sleeve anti-rotation structure and the lower hole wall anti-rotation structure constitute an axial sliding connection.

[0009] As a further solution of the present invention: the knob linkage sleeve is provided with an anti-slip block to prevent the knob linkage sleeve from being separated from the HEPA filter element along the axial direction; the anti-slip block and the knob linkage sleeve anti-rotation structure are staggered from each other in the circumferential direction.

[0010] As a further solution of the present invention: the knob linkage sleeve anti-rotation structure is an anti-rotation rib; the lower hole wall anti-rotation structure is an anti-rotation groove.

[0011] As a further solution of the present invention: a sealing ring rib is provided at the bottom of the HEPA filter element; an upper sealing ring block and a lower sealing ring block are formed on the knob body; an annular groove is formed between the upper sealing ring block and the lower sealing ring block; a sealing ring is provided in the annular groove; and the sealing ring abuts against the sealing ring rib.

[0012] As a further solution of the present invention: the knob body is provided with a plurality of anti-friction contacts that abut against the opening of the bottom hole of the HEPA filter element.

[0013] As a further solution of the present invention, the knob body comprises a conical upper cylinder and a conical step; the conical step connects the conical upper cylinder and the conical lower cylinder; the diameter of the conical upper cylinder is smaller than the diameter of the conical lower cylinder; the elastic expansion claw has an initial position and a locked position; in the initial position, the expansion contact is aligned with the conical upper cylinder, and the elastic expansion claw is in a retracted state and passes through the bottom cover basket HEPA filter element mounting hole; in the locked position, the expansion contact contacts the conical lower cylinder, thereby expanding the elastic expansion claw and allowing the hook to hook the hole of the bottom cover basket HEPA filter element mounting hole;

[0014] The knob linkage sleeve is screwed in along the thread of the knob body, so that the expansion contact moves from the initial position along the tapered step to the locking position.

[0015] As a further solution of the present invention: the knob assembly also includes: an anti-detachment guide cap for preventing the knob linkage sleeve from detaching from the knob body in the axial direction; the anti-detachment guide cap is installed to the knob body; a V-shaped guide wall is formed on the top of the expansion contact; the V-shaped guide wall is inserted into the anti-detachment guide cap, and the anti-detachment guide cap blocks the expansion contact from moving upward and radially outward.

[0016] As a further solution of the present invention: the elastic expansion claw is provided with a toggling structure for allowing the user to toggle the elastic expansion claw.

[0017] As a further solution of the present invention: the toggle structure is a friction structure.

[0018] As a further solution of the present invention: the knob body is formed with a knob sleeve sink groove for increasing the thread length of the knob thread; the bottom of the knob thread is sunken in the knob sleeve sink groove.

[0019] Compared with the prior art, the beneficial effects of the present invention are: time-saving and labor-saving installation by screw rotation; overcoming the distance deviation between the vacuum cleaner bottom cover basket and the HEPA filter element, and easily locking the HEPA filter element.

[0020] An annular groove is formed between the upper sealing ring stopper and the lower sealing ring stopper to limit the sealing ring and prevent the sealing ring from falling off.

[0021] Other features and advantages of the present invention will be disclosed in detail in the following specific embodiments and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of a vacuum cleaner filter element installation structure of the present utility model;

[0023] Figure 2 yes Figure 1 A cross-sectional view of a vacuum cleaner filter element installation structure;

[0024] Figure 3 yes Figure 1 A schematic diagram of a HEPA filter element in a vacuum cleaner filter element installation structure;

[0025] Figure 4 yes Figure 2 A partial enlarged view of a vacuum cleaner filter element installation structure;

[0026] Figure 5 yes Figure 1 A three-dimensional diagram of a knob assembly of a vacuum cleaner filter element mounting structure;

[0027] Figure 6 yes Figure 5 Plan view of the center knob assembly;

[0028] Figure 7 yes Figure 6 Cross-sectional view of the middle knob assembly along line AA;

[0029] Figure 8 yes Figure 6 Plane exploded view of the middle knob assembly;

[0030] Figure 9 yes Figure 5 3D exploded view of the center knob assembly.

[0031] List of accompanying drawings: vacuum cleaner filter element mounting structure 100, vacuum cleaner bottom cover basket 10, bottom cover basket HEPA filter element mounting hanging hole 11, HEPA filter element 20, HEPA filter element bottom hole 21, lower hole wall anti-rotation structure 211, sealing ring rib 22, knob assembly 30, knob linkage sleeve 31, elastic expansion claw 311, cara hook 3111, elastic arm 3112, expansion contact 3113, toggle structure 3114, V-shaped guide wall 3115, knob linkage sleeve anti-rotation structure 312, anti-slip protrusion 313, knob body 32, conical lower column 321, upper sealing ring block 322, lower sealing ring block 323, sealing ring 324, anti-friction contact 325, conical upper column 326, conical step 327, anti-slip guide cap 33. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] See also Figures 1 to 9 In an embodiment of the present invention, a vacuum cleaner filter cartridge mounting structure 100 includes: a vacuum cleaner bottom cover basket 10 and a HEPA filter cartridge 20. The vacuum cleaner bottom cover basket 10 is formed with a bottom cover basket HEPA filter cartridge mounting hanging hole 11. The HEPA filter cartridge 20 is formed with a HEPA filter cartridge bottom hole 21. Specifically, the HEPA filter cartridge bottom hole 21 is formed by the HEPA filter cartridge bottom end cap of the HEPA filter cartridge 20. The vacuum cleaner filter cartridge mounting structure 100 also includes: a knob assembly 30. The knob assembly 30 is used to mount the HEPA filter cartridge 20 on the vacuum cleaner bottom cover basket 10. Specifically, the knob assembly 30 passes through the bottom cover basket HEPA filter cartridge mounting hanging hole 11 and the HEPA filter cartridge bottom hole 21, and hooks onto the bottom cover basket HEPA filter cartridge mounting hanging hole 11 and the HEPA filter cartridge bottom hole 21 from both sides, thereby locking the vacuum cleaner bottom cover basket 10 and the HEPA filter cartridge 20 into a whole.

[0034] The knob assembly 30 includes: a knob linkage sleeve 31 and a knob body 32. The knob body 32 is for the user to rotate. The knob body 32 is provided with a handle for the user to rotate the knob body 32. The knob body 32 is formed with knob threads. The knob linkage sleeve 31 is formed with knob sleeve threads. The knob threads and the knob sleeve threads form a threaded connection, so that the knob body 32 is installed to the knob linkage sleeve 31 by threaded assembly, and the axial relative position of the knob linkage sleeve 31 and the knob body 32 is adjusted by threaded assembly. Specifically, the knob body 32 is provided with an external thread structure. The knob linkage sleeve 31 is provided with an internal thread structure. The internal thread structure and the external thread structure are used to adjust the axial relative position of the knob linkage sleeve 31 and the knob body 32 by threaded assembly.

[0035] The knob linkage sleeve 31 is provided with a plurality of elastic expansion claws 311. The plurality of elastic expansion claws 311 are evenly distributed around the circumference. In a specific embodiment, the number of elastic expansion claws 311 is three. As an alternative embodiment, the number of elastic expansion claws 311 can also be provided with two, four, or six, etc.

[0036] The elastic expansion claw 311 includes a carape hook 3111, an elastic arm 3112, and an expansion contact 3113. The carape hook 3111 and the expansion contact 3113 are connected to the elastic arm 3112. The knob body 32 is provided with a tapered lower column 321.

[0037] As the knob linkage sleeve 31 is threaded along the knob body 32, the conical lower cylinder 321 contacts the expansion contact 3113, causing the elastic arm 3112 to elastically deform, causing the hooks 3111 to move radially outward to hook onto the openings of the HEPA filter cartridge mounting holes 11 in the bottom cover basket. Specifically, the hooks 3111 expand in diameter to hook onto the openings of the HEPA filter cartridge mounting holes 11 in the bottom cover basket.

[0038] The knob body 32 and the knob linkage sleeve 31 form a whole that passes through the bottom cover basket HEPA filter element installation hanging hole 11 and the HEPA filter element bottom hole 21. The knob body 32 and the cara hook 3111 of the elastic expansion claw 311 lock the vacuum cleaner bottom cover basket 10 and the HEPA filter element 20 into a whole from both sides.

[0039] As a specific embodiment, the knob linkage sleeve 31 is provided with a knob linkage sleeve rotation stop structure 312. A lower hole wall rotation stop structure 211 is provided on the hole wall of the bottom hole 21 of the HEPA filter element. The lower hole wall rotation stop structure 211 cooperates with the knob linkage sleeve rotation stop structure 312 to prevent the knob linkage sleeve 31 from rotating relative to the bottom hole 21 of the HEPA filter element. The knob linkage sleeve rotation stop structure 312 and the lower hole wall rotation stop structure 211 form an axial sliding connection. The cooperation between the knob linkage sleeve rotation stop structure 312 and the lower hole wall rotation stop structure 211 enables the knob linkage sleeve 31 to only move axially relative to the HEPA filter element 20 and cannot rotate circumferentially.

[0040] As a specific embodiment, the knob linkage sleeve anti-rotation structure 312 is a rotation stop rib. The lower hole wall anti-rotation structure 211 is a rotation stop groove. The rotation stop rib slides axially in the rotation stop groove. As an optional embodiment, the knob linkage sleeve anti-rotation structure 312 and the lower hole wall anti-rotation structure 211 can also be configured as a flat structure and a flat hole. As another optional embodiment, the knob linkage sleeve anti-rotation structure 312 and the lower hole wall anti-rotation structure 211 can also be configured as mutually cooperating polygonal structures. For example, a hexagonal column and a hexagonal hole, or a quadrilateral column and a quadrilateral hole.

[0041] As a specific embodiment, the knob linkage sleeve 31 is provided with an anti-slip protrusion 313. The anti-slip protrusion 313 prevents the knob linkage sleeve 31 from being separated from the HEPA filter element 20 in the axial direction. The anti-slip protrusion 313 and the knob linkage sleeve anti-rotation structure 312 are circumferentially offset from each other. During installation, the anti-slip protrusion 313 is first passed through the bottom hole 21 of the HEPA filter element through the knob linkage sleeve anti-rotation structure 312, and then the knob linkage sleeve 31 is rotated to align the knob linkage sleeve anti-rotation structure 312 with the lower hole wall anti-rotation structure 211, and the knob assembly 30 is installed on the HEPA filter element 20. Since the anti-slip protrusion 313 and the knob linkage sleeve anti-rotation structure 312 are circumferentially offset from each other, the anti-slip protrusion 313 is stuck to the upper hole opening of the bottom hole 21 of the HEPA filter element to prevent it from falling off.

[0042] As a specific embodiment, a sealing ring rib 22 is provided at the bottom of the HEPA filter element 20. The knob body 32 is formed with an upper sealing ring block 322 and a lower sealing ring block 323. An annular groove is formed between the upper sealing ring block 322 and the lower sealing ring block 323. A sealing ring 324 is provided in the annular groove. The sealing ring 324 abuts against the sealing ring rib 22. The arrangement of the upper sealing ring block 322 and the lower sealing ring block 323 prevents the sealing ring 324 from falling off. A guide bevel structure is provided on the sealing ring rib 22 to facilitate the sealing ring's insertion into the sealing ring rib 22.

[0043] As a specific embodiment, the knob body 32 is formed with a knob sleeve recessed groove for increasing the length of the knob thread. The bottom of the knob thread is sunken into the knob sleeve recessed groove. The provision of the knob sleeve recessed groove minimizes the space occupied by the knob assembly.

[0044] As a specific embodiment, the knob body 32 is provided with a plurality of anti-friction contacts 325. Specifically, the anti-friction contacts 325 are arranged on the top of the outer groove wall of the knob sleeve sink. The top surface of the outer groove wall of the knob sleeve sink is the Hepa bottom contact surface, and the Hepa bottom contact surface protrudes upward to form a plurality of anti-friction contacts 325. The anti-friction contacts 325 abut against the orifice of the Hepa filter element bottom hole 21. As a preferred embodiment, the number of anti-friction contacts 325 is 3. As an optional embodiment, the number of anti-friction contacts 325 can also be set to 4, 5 or more. The anti-friction contacts 325 adjust the contact between the knob body 32 and the Hepa filter element 20 from surface contact to multi-point contact, thereby reducing friction and facilitating the rotation of the knob body 32.

[0045] As a specific embodiment, the knob body 32 has a conical upper cylinder 326 and a conical step 327. The conical step 327 connects the conical upper cylinder 326 and the conical lower cylinder 321. The diameter of the conical upper cylinder 326 is smaller than the diameter of the conical lower cylinder 321. The elastic expansion claw 311 has an initial position and a locking position. In the initial position, the expansion contact 3113 is aligned with the conical upper cylinder 326, and the elastic expansion claw 311 is in a retracted state and passes through the bottom cover basket HEPA filter element installation hanging hole 11. In the locking position, the expansion contact 3113 contacts the conical lower cylinder 321, so that the elastic expansion claw 311 is in an expanded state so that the cara hook 3111 hooks the orifice of the bottom cover basket HEPA filter element installation hanging hole 11. Specifically, the conical upper cylinder 326 is arranged above the conical lower cylinder 321. The conical lower cylinder 321 is located between the conical upper cylinder 326 and the external thread structure of the knob body 32. The knob linkage sleeve 31 is screwed in along the knob body 32 so that the expansion contact 3113 moves from the initial position along the tapered step 327 to the locking position.

[0046] The inner side of the expansion contact 3113, that is, the side facing the knob body 32, forms an expansion contact that is released from the knob body 32. When the knob body 32 and the knob linkage sleeve 31 rotate relative to each other, the expansion contact abuts against the knob body 32 and slides along the surface of the upper conical column 326, the conical step 327 and the lower conical column 321.

[0047] As a specific embodiment, the knob assembly 30 also includes: an anti-slip guide cap 33. The anti-slip guide cap 33 is used to prevent the knob linkage sleeve 31 from axially detaching from the knob body 32. The anti-slip guide cap 33 is installed to the knob body 32. The anti-slip guide cap 33 is located above the knob linkage sleeve 31, blocking the knob linkage sleeve 31 from moving upward and detaching from the knob body 32. A V-shaped guide wall 3115 is formed on the top of the expansion contact 3113. When the elastic expansion claw 311 is in the initial position, the V-shaped guide wall 3115 is inserted into the anti-slip guide cap 33, and the anti-slip guide cap 33 blocks the expansion contact 3113 from moving upward and radially outward.

[0048] The anti-slip guide cap 33 is attached to the knob body 32 via a snap-fit ​​mechanism. Specifically, the knob body 32 is hollow, with the externally threaded structure, the lower conical cylinder 321, and the upper conical cylinder 326 being hollow. The snap-fit ​​mechanism of the anti-slip guide cap 33 is inserted through the upper conical cylinder 326 into the hollow structure, achieving a snap-fit ​​connection. Specifically, the snap-fit ​​mechanism of the anti-slip guide cap 33 comprises an anti-slip expansion claw. Once inserted into the hollow structure of the knob body 32, the claw locks the anti-slip guide cap 33 and prevents it from separating from the knob body 32.

[0049] The anti-drop guide cap 33 forms a V-shaped inner wall. The top of the expansion contact 3113 forms a V-shaped guide wall 3115. This V-shaped inner wall surrounds the outer side of the V-shaped guide wall 3115, preventing the expansion contact 3113 from opening outward when the elastic claw 311 is in its initial position. If the elastic arm 3112 fails to rebound, the anti-drop guide cap 33 can be used to prevent the expansion contact 3113 from opening outward, resolving installation issues caused by the elastic arm 3112 failing to automatically rebound.

[0050] As a specific embodiment, the elastic expansion claw 311 is provided with a toggle structure 3114. The toggle structure 3114 is for the user to toggle the elastic expansion claw 311. When the elastic arm 3112 of the elastic expansion claw 311 undergoes self-deformation elastic aging, the toggle structure 3114 can be forced to deform by human hand to perform disassembly and assembly. As a specific embodiment, the toggle structure 3114 is a friction structure. Specifically, the friction structure is a pattern, a bump or a rib that increases the friction force. As a specific embodiment, the friction structure is arranged above the cara hook 3111. As an optional embodiment, the toggle structure 3114 can also be set as a bump, a push rod or a handle that can be toggled by the user.

[0051] When installing the HEPA filter element 20, first install the knob assembly 30 on the HEPA filter element 20. Then install the entirety of the knob assembly 30 and the HEPA filter element 20 to the bottom cover basket 10 of the vacuum cleaner.

[0052] Install the knob assembly 30 onto the HEPA filter element 20. First, install the knob linkage sleeve 31 onto the HEPA filter element 20 from top to bottom, then install the knob body 32 onto the knob linkage sleeve 31 from bottom to top, and finally install the anti-drop guide cap 33 onto the knob body 32.

[0053] Install the knob assembly 30 and HEPA filter cartridge 20 into the vacuum cleaner's bottom cover basket 10. First, align the HEPA filter cartridge 20 with the bottom cover basket 10. The knob assembly 30 is inserted through the HEPA filter cartridge mounting hole 11 in the bottom cover basket. Initially, the knob linkage sleeve 31 is positioned relatively high in the thread relative to the knob body 32. The hook 3111 is positioned above the HEPA filter cartridge mounting hole 11 in the bottom cover basket. Due to the knob linkage sleeve's anti-rotation structure 312, the knob linkage sleeve 31 can only move axially and not rotationally. Rotate the knob body 32, and the knob linkage sleeve 31, driven by the threaded connection, moves axially downward. The expansion contact 3113 contacts the lower cone column 321, causing the elastic expansion claw 311 to expand. Continue rotating the knob body 32, causing the hook 3111 to move downward, hooking onto the opening of the HEPA filter cartridge mounting hole 11 in the bottom cover basket, securing the HEPA filter cartridge 20.

[0054] As a specific implementation, the knob assembly 30 of different sizes can be configured as needed, and by adjusting the length of the thread and the size of the cara hook 3111, it can be adapted to different movement strokes and orifices of different apertures.

[0055] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0056] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A vacuum cleaner filter element mounting structure (100), comprising: A vacuum cleaner bottom cover basket (10) and a HEPA filter element (20); the vacuum cleaner bottom cover basket (10) is formed with a bottom cover basket HEPA filter element mounting hanging hole (11); the HEPA filter element (20) is formed with a HEPA filter element bottom hole (21); characterized in that the vacuum cleaner filter element mounting structure (100) further comprises: a knob assembly (30) for mounting the HEPA filter element (20) on the vacuum cleaner bottom cover basket (10); the knob assembly (30) comprises: a knob linkage sleeve (31) and a knob body (32) for a user to rotate; the knob body (32) is formed with a knob thread; the knob linkage sleeve (31) is formed with a knob sleeve thread; the knob thread The threaded connection is formed between the threaded thread and the knob sleeve thread, so that the knob body (32) is installed on the knob linkage sleeve (31) by threaded rotation, and the axial relative position of the knob linkage sleeve (31) and the knob body (32) is adjusted by threaded rotation; the knob linkage sleeve (31) is provided with a plurality of elastic expansion claws (311); the elastic expansion claws (311) include: a cara hook (3111), an elastic arm (3112) and an expansion contact (3113); the cara hook (3111) and the expansion contact (3113) are connected to the elastic arm (3112); the knob body (32) is provided with a cone lower column (321); When the knob linkage sleeve (31) is screwed in along the thread of the knob body (32), the lower cone column (321) abuts against the expansion contact (3113), causing the elastic arm (3112) to undergo elastic deformation, thereby causing the hook (3111) to move radially outward to hook the opening of the bottom cover basket HEPA filter element installation hanging hole (11); the whole formed by the knob body (32) and the knob linkage sleeve (31) passes through the bottom cover basket HEPA filter element installation hanging hole (11) and the HEPA filter element bottom hole (21), and the knob body (32) and the hook (3111) of the elastic expansion claw (311) lock the vacuum cleaner bottom cover basket (10) and the HEPA filter element (20) into a whole from both sides; The knob linkage sleeve (31) is provided with a knob linkage sleeve anti-rotation structure (312); a lower hole wall anti-rotation structure (211) is provided on the hole wall of the bottom hole (21) of the HEPA filter element, which cooperates with the knob linkage sleeve anti-rotation structure (312) to prevent the knob linkage sleeve (31) from rotating relative to the bottom hole (21) of the HEPA filter element; the knob linkage sleeve anti-rotation structure (312) and the lower hole wall anti-rotation structure (211) form an axial sliding connection.

2. A vacuum cleaner filter element mounting structure (100) according to claim 1, characterized in that: The knob linkage sleeve (31) is provided with an anti-slip protrusion (313) for preventing the knob linkage sleeve (31) from being separated from the HEPA filter element (20) in the axial direction; the anti-slip protrusion (313) and the knob linkage sleeve anti-rotation structure (312) are circumferentially offset from each other.

3. The vacuum cleaner filter element mounting structure (100) according to claim 1, characterized in that: The knob linkage sleeve anti-rotation structure (312) serves as an anti-rotation rib; and the lower hole wall anti-rotation structure (211) serves as an anti-rotation groove.

4. The vacuum cleaner filter element mounting structure (100) according to claim 1, characterized in that: The bottom of the HEPA filter element (20) is provided with a sealing ring rib (22); the knob body (32) is formed with an upper sealing ring block (322) and a lower sealing ring block (323); an annular groove is formed between the upper sealing ring block (322) and the lower sealing ring block (323); a sealing ring (324) is provided in the annular groove; and the sealing ring (324) abuts against the sealing ring rib (22).

5. The vacuum cleaner filter element mounting structure (100) according to claim 1, characterized in that: The knob body (32) is provided with a plurality of anti-friction contact points (325) that abut against the opening of the bottom hole (21) of the HEPA filter element.

6. The vacuum cleaner filter element mounting structure (100) according to claim 1, characterized in that: The knob body (32) has an upper cone column (326) and a conical step (327); the conical step (327) connects the upper cone column (326) and the lower cone column (321); the diameter of the upper cone column (326) is smaller than the diameter of the lower cone column (321); the elastic expansion claw (311) has an initial position and a locking position; in the initial position, the expansion contact (3113) is aligned with the upper cone column (326), and the elastic expansion claw (311) is in a contracted state and passes through the bottom cover basket Hepa filter element installation hanging hole (11); in the locking position, the expansion contact (3113) contacts the lower cone column (321), thereby causing the elastic expansion claw (311) to be in an expanded state so that the hook (3111) hooks the opening of the bottom cover basket Hepa filter element installation hanging hole (11); The knob linkage sleeve (31) is screwed in along the thread of the knob body (32), so that the expansion contact (3113) moves from the initial position along the tapered step (327) to the locking position.

7. The vacuum cleaner filter element mounting structure (100) according to claim 1, characterized in that: The knob assembly (30) further includes: an anti-slip guide cap (33) for preventing the knob linkage sleeve (31) from being axially disengaged from the knob body (32); the anti-slip guide cap (33) is mounted on the knob body (32); a V-shaped guide wall (3115) is formed on the top of the expansion contact (3113); When the elastic expansion claw (311) is in the initial position, the V-shaped guide wall (3115) is inserted into the anti-slip guide cap (33), and the anti-slip guide cap (33) blocks the expansion contact (3113) from moving upward and radially outward.

8. The vacuum cleaner filter element mounting structure (100) according to claim 1, characterized in that: The elastic expansion claw (311) is provided with a toggling structure (3114) for allowing a user to toggle the elastic expansion claw (311).

9. A vacuum cleaner filter element mounting structure (100) according to claim 8, characterized in that: The toggle structure (3114) is a friction structure.

10. The vacuum cleaner filter element mounting structure (100) according to claim 1, characterized in that: The knob body (32) is formed with a knob sleeve sink groove for increasing the length of the knob thread; the bottom of the knob thread is sunk into the knob sleeve sink groove.

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