CN108606721B

CN108606721B - Dust collector and filtering assembly

Info

Publication number: CN108606721B
Application number: CN201810317551.9A
Authority: CN
Inventors: 桑树华; 郜元刚
Original assignee: Suzhou Alton Electrical and Mechanical Industry Co Ltd
Current assignee: Suzhou Alton Electrical and Mechanical Industry Co Ltd
Priority date: 2018-04-10
Filing date: 2018-04-10
Publication date: 2020-11-10
Anticipated expiration: 2038-04-10
Also published as: CN108606721A

Abstract

A dust collector comprises a filter support, a filter cartridge sleeved outside the filter support, an end cap connected to the filter cartridge, and a cover body assembled on the end cap, wherein the cover body can rotate relative to the end cap, the end cap is provided with a sliding groove, a first blocking wall and a second blocking wall which are positioned at two opposite ends of the sliding groove, the cover body is also provided with a lug, the lug can rotate along the sliding groove between the first blocking wall and the second blocking wall, the lug rotates along a rotating direction to the first blocking wall, the first blocking wall blocks the lug to prevent the cover body from continuously rotating relative to the end cap along the rotating direction, the lug rotates along the rotating direction to the second blocking wall, the second blocking wall blocks the lug to prevent the cover body from continuously rotating relative to the end cap along the rotating direction, the first blocking wall and the second blocking wall are opposite to each other in the rotating direction, and the first blocking wall and the second blocking wall effectively limit the rotating range of the cover body relative to the end cap, and the user experience is improved.

Description

Dust collector and filtering assembly

[ technical field ] A method for producing a semiconductor device

The invention relates to a dust collector, in particular to a filtering device of the dust collector.

[ background of the invention ]

A dust collector is a common household cleaning device, and a patent with publication number CN203328636 discloses a dust collector, wherein an end cap at one end of a filter cylinder is provided with an end hole penetrating through the end cap, a central column on a filter support penetrates through the end hole, a fixing button is screwed and locked on an end cap, a plurality of claw parts are integrally extended from the fixing button, and the claw parts on the fixing button hold the central column in the process of screwing the fixing button on the end cap.

[ summary of the invention ]

The invention provides a dust collector, which effectively limits the rotation range of a cover body relative to an end cap and improves the user experience.

In order to solve the technical problems, the invention adopts the following technical scheme: a dust collector comprises a filter support, a filter cartridge sleeved outside the filter support, an end cap connected to the filter cartridge, and a cover body assembled on the end cap, wherein the cover body can rotate relative to the end cap, the end cap is provided with a sliding groove, a first blocking wall and a second blocking wall, the first blocking wall and the second blocking wall are positioned at two opposite ends of the sliding groove, the cover body is further provided with a lug, the lug can rotate between the first blocking wall and the second blocking wall along the sliding groove, the lug rotates along a rotating direction to the first blocking wall, the first blocking wall blocks the lug to prevent the cover body from continuously rotating relative to the end cap along the rotating direction, the lug rotates along the rotating direction to the second blocking wall, the second blocking wall blocks the lug to prevent the cover body from continuously rotating relative to the end cap against the rotating direction, and the first blocking wall and the second blocking wall are opposite to the rotating direction.

So design, first fender wall and second fender wall have effectively injectd the rotation range of lid for the end cap, are favorable to avoiding the lid of twisting of the too much number of turns of user, promote user experience.

Furthermore, the end cap has a plurality of spout, a plurality of first fender wall, a plurality of the second fender wall, the end cap still is equipped with a plurality of first lateral walls, a plurality of second lateral wall, and each first lateral wall, each second lateral wall encircle the rotation axis of lid jointly, and each first lateral wall and each second lateral wall are crisscross to be distributed, first fender wall and first fender wall are connected respectively between first lateral wall and second lateral wall.

Furthermore, each first blocking wall comprises a first lateral edge departing from the rotation axis of the cover body and a second lateral edge positioned between the first lateral edge and the rotation axis of the cover body, each second blocking wall comprises a third lateral edge departing from the rotation axis of the cover body and a fourth lateral edge positioned between the third lateral edge and the rotation axis of the cover body, each first lateral wall is connected with the second lateral edge of the first blocking wall and the fourth lateral edge of the second blocking wall, and each second lateral wall is connected with the first lateral edge of the first blocking wall and the third lateral edge of the second blocking wall.

Furthermore, each first blocking wall comprises a first lateral edge facing away from the rotation axis of the cover body and a second lateral edge located between the first lateral edge and the rotation axis of the cover body, each second blocking wall comprises a third lateral edge facing away from the rotation axis of the cover body and a fourth lateral edge located between the third lateral edge and the rotation axis of the cover body, each first lateral wall extends from the second lateral edge of the first blocking wall against the rotation direction, each second lateral wall extends from the first lateral edge of the first blocking wall along the rotation direction, each first lateral wall extends from the fourth lateral edge of the second blocking wall along the rotation direction, and each second lateral wall extends from the third lateral edge of the second blocking wall against the rotation direction.

Furthermore, the end cap is provided with a plurality of sliding grooves, a plurality of first blocking walls and a plurality of second blocking walls, the cover body is provided with a plurality of protruding blocks, the end cap is further provided with a plurality of openings and a plurality of baffle plates, the baffle plates are used for stopping one side of the protruding blocks to prevent the cover body from being separated from the end cap, the openings are formed between one ends of the corresponding baffle plates and the second blocking walls, and the protruding blocks respectively enter the sliding grooves through the openings when the cover body is installed on the end cap.

Furthermore, the end cap is provided with a plurality of sliding grooves, a plurality of first blocking walls and a plurality of second blocking walls, the filter support is provided with a center pillar, the cover body can rotate around the center pillar along and against the rotating direction, the end cap is provided with a plurality of clamping pieces, in the rotating process of the cover body relative to the end cap along the rotating direction, the cover body pushes the clamping pieces to move towards the center pillar so that the clamping pieces clamp the center pillar, the end cap is further provided with a plurality of first side walls, the clamping pieces respectively extend integrally from the corresponding first side walls, and the first side walls are connected between the first blocking walls and the second blocking walls.

Furthermore, the cover body is further provided with a plurality of pushing parts for pushing the clamping pieces, the cover body is provided with a plurality of convex blocks, each pushing part respectively pushes the corresponding clamping piece to move towards the center post in the rotating process of the cover body relative to the end cap along the rotating direction, the cover body is provided with a cover plate and an annular peripheral wall integrally connected to the periphery of the cover plate, the pushing parts respectively extend integrally from the cover plate, the convex blocks respectively extend integrally from the side plates, the end cap is provided with a through end hole, and the center post penetrates through the end hole to enter the cover body.

Furthermore, the end cap is further provided with a first side wall and a baffle plate extending from the first side wall, and the baffle plate stops at one side of the projection to prevent the cover body from separating from the end cap.

Furthermore, the filter cartridge has an accommodating space for accommodating the filter support, the end cap is further provided with a bottom plate, the first side wall, the first blocking wall and the second blocking wall are respectively and integrally connected to the bottom plate, the bottom plate and the baffle plate are spaced from each other, the first side wall, the first blocking wall, the second blocking wall and the baffle plate are located on one side of the bottom plate, and the accommodating space is located on the opposite side of the bottom plate.

Furthermore, the first side wall, the first blocking wall and the second blocking wall are perpendicular to the bottom plate respectively, and the blocking plate is parallel to the bottom plate.

Further, the bottom plate is equipped with the opening that link up the bottom plate, the opening is relative with the baffle, the opening communicates between spout and accommodating space, the lid still is equipped with the extension that extends into the opening, the lid rotates the in-process for the end cap, and the extension follows the lid and rotates and be limited to and rotate between the first end of opening and the second end of opening, first end with the second end is in relative in the direction of rotation.

Further, a projection of the baffle along a line parallel to the axis of rotation of the cover is covered by a projection of the opening along the line.

Further, the extension portion integrally extends from the projection.

Further, the through opening is arc-shaped, and the extending part is parallel to the rotation axis of the cover body.

Furthermore, the first blocking wall is located at a first end of the through opening, and a second end of the through opening is located between the first blocking wall and the second blocking wall in the rotating direction.

Furthermore, the first side wall and the baffle plate respectively form a groove wall of the sliding groove, and the sliding groove and the convex block are located on the radial outer side of the first side wall.

Further, the angle of the lug rotating from the first blocking wall to the second blocking wall is 75-105 degrees.

The invention also provides a filter assembly for a dust collector, which comprises a filter cylinder, an end cap connected and shielded at one end of the filter cylinder, an end ring connected at the other end of the filter cylinder, wherein the end cap is provided with a through end hole, the filter assembly also comprises a cover body rotatably held at the outer side of the end cap, the cover body shields the end hole, the end cap is provided with a sliding groove, a first blocking wall and a second blocking wall which are positioned at two opposite ends of the sliding groove, the lug can rotate between the first blocking wall and the second blocking wall along the sliding groove, the lug rotates to the first blocking wall along a rotating direction, the first blocking wall blocks the lug to prevent the cover body from continuously rotating relative to the end cap along the rotating direction, the lug rotates to the second blocking wall along the rotating direction, and the second blocking wall blocks the lug to prevent the cover body from continuously rotating relative to the end cap along the rotating direction, the first blocking wall is opposite to the second blocking wall in the rotation direction.

Furthermore, the end cap further comprises a first side wall and a baffle plate extending from the first side wall, the baffle plate is stopped at one side of the projection to prevent the cover body from being separated from the end cap, the end cap is provided with a clamping piece, the cover body pushes the clamping piece to move towards the rotation axis of the cover body in the rotating process of the cover body relative to the end cap along the rotation direction, and the clamping piece integrally extends from the first side wall.

These features and advantages of the present invention will be disclosed in more detail in the following detailed description and the accompanying drawings.

[ description of the drawings ]

FIG. 1 is a schematic view, partly in section, of a vacuum cleaner according to the invention;

FIG. 2 is a perspective view of the filter and the tray of the vacuum cleaner of the present invention;

FIG. 3 is a perspective view of FIG. 2 with the cover removed;

FIG. 4 is an exploded view of the filter assembly and tray;

FIG. 5 is an angled perspective view of the end cap;

FIG. 6 is a perspective view of another angle of the end cap;

FIG. 7 is a perspective view of the cover at an angle;

FIG. 8 is a perspective view of another angle of the cover;

FIG. 9 is a top view of the cover;

FIG. 10 is a perspective view of the filter holder;

FIG. 11 is a longitudinal cross-sectional view of the filter device at an angle to the tray (section parallel to axis B and center post not clamped);

FIG. 12 is a longitudinal cross-sectional view of the filter device at another angle to the tray (the section is parallel to axis B and the center post is clamped);

FIG. 13 is a longitudinal cross-sectional view of the filter device at a further angle to the tray (section parallel to axis B and center post clamped);

FIG. 14 is a transverse cross-sectional view at an angle of the filter device (the cross-section is perpendicular to axis B and the center post is not clamped);

FIG. 15 is a transverse cross-sectional view of the filter device at another angle (the section is perpendicular to axis B and the center post is clamped);

FIG. 16 is a longitudinal cross-sectional view of the modified endcap at an angle to the cover (the section plane being parallel to axis B and the first and second interference portions interfering);

FIG. 17 is a partial perspective view of the modified endcap;

FIG. 18 is a schematic cross-sectional view of the modified end cap at another angle to the cover (the cross-section being perpendicular to axis B and the second and sixth guide surfaces interfering);

FIG. 19 is a perspective view of the improved endcap at an angle to the cover;

FIG. 20 is a perspective view of the modified endcap at another angle relative to the cover;

FIG. 21 is an angled perspective view of the modified cover;

fig. 22 is a perspective view of the improved cover body at another angle.

[ detailed description ] embodiments

The technical solutions of the embodiments of the present invention are explained and illustrated below with reference to the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention, and not all embodiments. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative effort belong to the protection scope of the present invention.

In the present invention, "up" and "down" and "side" and "outer" are used to describe the relative positions of various objects in the drawings, but these terms are not used to limit the components, regions, and the like; as to the number, several are merely examples and may be set as necessary.

Referring to fig. 1 to 15, the cleaner has a dust bucket 1, a head 2, a filter device 3, and a float 93. The dust barrel 1 is provided with an air inlet 10, and the bottom of the dust barrel 1 is provided with four trundles 11. The head 2 is mounted on the upper end of the dust barrel 1 and has a motor (not shown), an impeller (not shown) and an air outlet 20. The filter device 3 is accommodated in the dust barrel 1, and the filter device 3 is in fluid communication between the air inlet 10 and the impeller for filtering dust. When the dust collector works, the motor drives the impeller to generate negative pressure, so that air flow mixed with dust flows into the dust barrel 1 from the air inlet 10, flows into the machine head 2 after being filtered by the filtering device 3, and is discharged out of the dust collector through the air outlet 20. The rated power of the motor is between 100w and 3000w, preferably between 200w and 1800w, such as 960w, 1200w, 1320w, 1440 w; the capacity of the vacuum cleaner or dirt cup 1 is between 0.5 gallons (3.785412 liters for 1 gallon) and 30 gallons, preferably between 1 gallon and 20 gallons, such as 6 gallons, 9 gallons, 10 gallons, 12 gallons, 14 gallons, and 16 gallons.

Referring to fig. 2 to 15, the filter device 3 includes a filter support 4, a filter cartridge 92 fitted to the outside of the filter support 4, an end cap 6 connected to one end of the filter cartridge 92, a cover 7 attached to the outside of the end cap 6, a seal ring 8, an end ring 90, and a tray 91. The filter cartridge 92 is hollow, and the filter cartridge 92 and the filter support 4 are respectively at least partially located in the dust barrel 1. The cover 7 is located on the underside of the end cap 6. The end ring 90 and the end cap 6 are located at two opposite ends of the filter cylinder 92, the end ring 90 is connected to the upper end of the filter cylinder 92, the end ring 90 is made of flexible material and sealed at the periphery of the lower end of the tray 91, and the tray 91 is locked on the lower end face of the handpiece 2. The end cap 6 is shielded at one end of the filter cartridge 92, the end cap 6 has a through end hole 60, the cover 7 shields the end hole 60, the filter support 4 is provided with a center pillar 40, a bottom plate 41, a longitudinal rib 42, a circumferential rib 43, a through hole 44, a rib plate 45 and a support rib position 46, the through hole 44 and the bottom plate 41 are positioned at the lower part of the filter support 4, and the center pillar 40 enters the cover 7 through the end hole 60 of the end cap 6. The through hole 44 is communicated with the upper side of the bottom plate 41 and penetrates through the central column 40, the upper side of the bottom plate 41 is communicated with the inside of the cover body 7 through the through hole 44, at least part of liquid/accumulated water sucked into the dust collector to the upper side of the bottom plate 41 flows into the cover body 7 through the through hole 44, the accumulated water is reduced, normal floating of the floater 93 is facilitated, and the floater 93 is prevented from being stuck to the bottom plate 41. The filter holder 4 is formed in a cage shape as a whole, and a circumferential rib 43 is formed integrally with and intersects with a longitudinal rib 42, and a center pillar 40 is integrally extended from the center of a bottom plate 41. The filter cartridge 92 is formed with spaced ridges 920 or pleats and is perforated with dust filtering apertures. The center pillar 40 passes through the end hole 60, and the center pillar 40 integrally extends downward from the bottom plate 41. The cover 7 is rotatably held on the end cap 6, the cover 7 being rotatable about the post 40 in and against the direction of rotation a. The end cap 6 is provided with a plurality of clamping members 61 for pressing against the center post 40, and during the rotation of the cover 7 relative to the end cap 6 along the rotation direction a, the cover 7 pushes each clamping member 61 to move towards the center post 40 so that the clamping members 61 clamp the center post 40. During rotation of the cover 7 relative to the end cap 6 against the rotation direction a, each of the clamps 61 moves away from the center post 40 to release the clamping of the center post 40. The lid body 7 rotates about the center post 40 both in and against the rotation direction a. The number of the clamp 61 in the present embodiment is two, which is merely an example, and the number is not limited thereto, and may be set as needed.

The through hole 44 penetrates downward from the upper surface 410 of the bottom plate 41 to the lower side of the lower end of the center pillar 40. The upper side of the bottom plate 41 is formed with a recessed area 411, and the upper end of the through-hole 44 is located at the recessed area 411. The bottom plate 41 has a flat plate shape, and may have a concave shape at the center. The longitudinal ribs 42 are circumferentially arranged at intervals, the lower ends of the longitudinal ribs 42 are integrally connected to the bottom plate 41, the rib plates 45 extend upwards from the bottom plate 41 and are connected with the adjacent longitudinal ribs 42, and the lower ends of the longitudinal ribs 42, the rib plates 45 and the bottom plate 41 enclose a recessed area 411. The annular circumferential ribs 43 are arranged at intervals up and down, and the longitudinal ribs 42 and the circumferential ribs 43 intersect to form grid openings 46 for air circulation. The recessed area 411 of this embodiment is shallow, and the recessed area 411 is easy to accumulate water, and the accumulated water in the recessed area 411 can be discharged in time through the through hole 44, and the depth and the shape of the recessed area 411 are not limited to this embodiment. The longitudinal ribs 42 include first longitudinal ribs 420 and second longitudinal ribs 421 which intersect with each other, and the rib 45 connects the adjacent second longitudinal ribs 421. The plurality of longitudinal ribs 42 comprises at least two groups of longitudinal ribs 42, the longitudinal ribs 42 of each group of longitudinal ribs 42 are adjacent in sequence (adjacent in sequence: the longitudinal rib 42-1 is adjacent to the adjacent longitudinal rib 42-2, and the longitudinal rib 42-2 is adjacent to the adjacent longitudinal rib 42-3), and the longitudinal first ribs 420-1, 420-2, 420-3 of each group of longitudinal ribs 42 are parallel. The cross section of each longitudinal second rib 421 of the plurality of longitudinal ribs 42 is in the shape of an arc extending along the circumferential direction of the filter holder 4 and on the same circumference (cross section, i.e., a section perpendicular to the axis B). The float 93 is positioned in the filter holder 4 and on the upper side of the bottom plate 41, the support rib position 46 protrudes upward from the upper surface 410 of the bottom plate 41, and the float 93 is supported on the support rib position 46 and spaced apart from the upper surface 410 of the bottom plate 41, so that the float 93 does not abut against the upper surface 410 of the bottom plate 41, and the float 93 is easily and naturally floated when the liquid level rises. When the liquid level rises to a certain height, the float 93 rising to a predetermined height blocks the air inlet between the head 2 and the filter holder 4, and prevents liquid from being sucked into the head 2. The support rib locations 46 each extend radially inward from a corresponding longitudinal rib 42. The support rib locations 46 each extend radially inward from and parallel to the longitudinal first rib 420 of the corresponding longitudinal rib 42.

The rotation axis of the lid 7, that is, the center axis around which the lid 7 rotates, is a virtual line, and the rotation axis of the lid 7 passes through the end hole 60, and in the present embodiment, the axis B is the center line of the center pillar 40, the rotation axis of the lid 7, and the center line of the filter cartridge 92. The cover 7 is provided with a plurality of pushing portions 70, the pushing portions 70 correspond to the clamping members 61 one by one, and each pushing portion 70 rotates along with the cover 7 in the rotation process of the cover 7. When the cover 7 is rotated between the first angular position and the second angular position relative to the end cap 6, when the cover 7 is at the first angular position (see fig. 15, the center pillar 40 is clamped and the protrusion 72 is stopped by the first blocking wall 55), each pushing portion 70 pushes the corresponding clamping member 61 toward the center pillar 40 to clamp the center pillar 40 by the clamping members 61, and when the cover 7 is rotated from the first angular position to the second angular position (see fig. 14, at this time, the center pillar 40 is unclamped and the protrusion 72 is located at the opening 54) around the center pillar 40, each pushing portion 70 rotates along with the cover 7 and the clamping members 61 move away from the center pillar 40 to unclamp the center pillar 40. The center pillar 40 is perpendicular to the end cap 6, the end cap 6 has a disk shape, and the through hole 44 is located at the center of the end cap 6. The cover 7 can be in different angular positions based on the rotation of the end cap 6 by different angles, which are distinguished based on the rotation of the cover 7 by different angles, such as: the cover body 7 rotates on the end cap 6 for a certain angle to form an angle position, and then continues to rotate for a certain angle to form an angle position, so that any angle position relative to the end cap 6 can be defined for the cover body 7 as required.

During the rotation of the cover 7 relative to the end cap 6 along the rotation direction a, each of the pushing portions 70 rotates along with the cover 7, and pushes the corresponding clamping member 61 to move toward the center post 40, so that the clamping members 61 clamp the center post 40. The clamping members 61 are provided with cam surfaces 62 facing away from the center posts 40, and during the rotation of the cover 7 around the center posts 40 along the rotation direction a, each abutting portion 70 slides along the cam surface 62 of the corresponding clamping member 61 and abuts against the cam surface 62 to push the corresponding clamping member 61 to move towards the center post 40. In the process that the cover body 7 rotates along the rotating direction a, the pushing part 70 sequentially slides over any first area and any second area on the cam surface 62; the second region is at a greater vertical distance from the axis B than the first region when the cover 7 is in any position between the first and second angular positions. When the cover 7 is at the first angle position, each pushing portion 70 abuts against a third area of the cam surface 62 of the corresponding clamping member 61, when the cover 7 is at the second angle position, each pushing portion 70 abuts against a fourth area of the cam surface 62 of the corresponding clamping member 61, and when the cover 7 is at any position between the first angle position and the second angle position, the vertical distance from the third area to the axis B of the cover 7 is greater than that from the fourth area to the axis B. The area of the cam surface 62 over which the pushed portion 70 slides includes a line area on a plane perpendicular to the axis B, that is, the line area is obtained by intersecting the plane with the area of the cam surface 62 over which the pushed portion 70 slides; when the cover 7 is located at the first angle position, the vertical distance from the point where the line region upper pushing part 70 firstly slides along the rotation direction a to the axis B is smaller than the vertical distance from the point where the pushing part 70 later slides to the axis B; when the cover 7 is at the second angular position, the vertical distance from the point where the line region upper pushing part 70 first slides along the rotation direction a to the axis B is smaller than the vertical distance from the point where the pushing part 70 later slides to the axis B; when the cover 7 is at any position between the first angle position and the second angle position, the vertical distance from the point where the line region upper pushing part 70 slides first along the rotation direction a to the axis B is smaller than the vertical distance from the point where the pushing part 70 slides later to the axis B.

The outer peripheral surface of the center post 40 is provided with a thread 400, the clamps 61 are provided with ribs 610 corresponding to the thread 400 of the center post 40, and during the rotation of the cover 7 around the center post 40 in the rotation direction a, the cover 7 pushes each clamp 61 to move towards the center post 40 so that the clamps 61 clamp the center post 40 and the ribs 610 are embedded in the thread 400 of the center post 40. The thread 400 is a double-thread and comprises a first thread 401 and a second thread 402 which can be overlapped with the first thread 401 after rotating 180 degrees around the axis of the central pillar 40, the number of the clamping pieces 61 is two, the rib 610 of one clamping piece 61 can be overlapped with the rib 610 of the other clamping piece 61 after rotating 180 degrees around the central pillar 40, after the two clamping pieces 61 clamp the central pillar 40, the rib 610 of one clamping piece 61 is correspondingly embedded in the first thread 401, and the rib 610 of the other clamping piece 61 is correspondingly embedded in the second thread 402; one of the clamps 61 may be aligned with the other clamp 61 after being rotated 180 degrees around the center post 40. The center pillar 40 is provided with a screw portion 403 and a shoulder portion 404, and the screw 400 is located on the outer peripheral surface of the screw portion 403. According to the invention, after the center pillar 40 is locked by the clamping piece 61, the rib 610 embedded in the thread of the center pillar 40 can effectively inhibit the clamping piece 61 from moving up and down relative to the center pillar 40 to be loosened, so that the center pillar 40 is stably locked by the clamping piece 61. When the cover body 7 is located at the first angle position, the rib is embedded in the thread of the center pillar 40, when the cover body 7 rotates to the second angle position from the first angle position against the rotating direction a, the clamping piece 61 moves to the direction away from the center pillar 40 to release the clamping to the center pillar 40, when the cover body 7 rotates along the rotating direction a from the first angle position, the cover body 7 drives the end cap 6 and the clamping piece 61 to rotate along the rotating direction a, and the rib 610 of the clamping piece 61 climbs along the thread 400. When the cover 7 is rotated from the first angular position along the rotation direction a, the protrusion 72 pushes against the first blocking wall 55 to drive the end cap 6 and the clamping member 61 to rotate along the rotation direction a. During rotation of the cover 7 relative to the end cap 6 in the direction of rotation a, the cover 7 pushes the gripping member 61 towards the axis of rotation of the cover 7.

During the rotation of the cover 7 around the center post 40 along the rotation direction a, each abutting portion 70 rotates along with the cover 7, each abutting portion 70 slides along the cam surface 62 of the corresponding clamping member 61, and abuts against the cam surface 62 to push the corresponding clamping member 61 to move towards the center post 40. The cam surface 62 causes the clamp 61 to operate like a cam. During the rotation of the cover 7 around the center post 40 along the rotation direction a, the cover 7 pushes the clamping members 61 to move toward the threaded portion 403, so that the clamping members 61 press against the threads 400 of the threaded portion 403 to clamp the threaded portion 403. The shoulder 404 has a cylindrical shape having a radial dimension larger than that of the threaded portion 403, and the threaded portion 403 extends downward from the lower end of the shoulder 404.

The holding member 61 is integrally connected to the cantilevered arm of the end cap 6 and is curved so as to extend perpendicular to the axis B. The holding members 61 include elastic portions 63 integrally extending from the end cap 6 and holding portions 64 further extending from the elastic portions 63, and each holding member 61 holds the center pillar 40 by the holding portion 64 provided. When the cover 7 is rotated in the direction opposite to the rotation direction a, each of the clamping portions 64 is moved in a direction away from the center pillar 40 by the elastic force of the corresponding elastic portion 63, and the clamping of the center pillar 40 is released. The cam surface 62 is provided on the holding portion 64, and the urging portion 70 urges the holding portion 64 to move toward the center pillar 40 by the deformation of the elastic portion 63. The clamping portion 64 is further provided with a concave surface 65 facing away from the cam surface 62, and a deformation opening 66, the concave surface 65 is pressed against the center pillar 40 when each clamping member 61 clamps the center pillar 40, and the concave surface 65 has an arc shape, preferably an arc shape, conforming to the outer contour of the center pillar 40. The holding portion 64 has an arc shape projecting in a direction away from the axis B. The deformation port 66 is located between the cam surface 62 and the concave surface 65 to reduce deformation of the clip portion 64 during molding. The clamping portion 64 is a part of a cam, and has a cam-like effect, and during the rotation of the cover 7 along the rotation direction a, the pressing portion 70 presses the clamping member 61 to the center pillar 40 or the axis B with an increasing magnitude, so that the clamping member 61 is closer to the center pillar 40 and finally clamps the center pillar 40, and the area of the cam surface 62 closer to the free end of the clamping member 61 is farther from the axis B.

The clamps 61 are further provided with third guide slopes 68 guiding the center pillar 40 to be inserted between the clamps 61, the third guide slopes 68 being inclined with respect to the axis B. The third guide slope 68 is located on the upper side of the clamping member 61 and is provided to the corresponding clamping portion 64. The end cap 6 is provided with a recessed area 50 recessed upward from the lower side thereof, a bottom plate 51 corresponding to the recessed area 50, a plurality of first side walls 52, a baffle 53 bent and extended from each first side wall 52, an opening 54, a first baffle wall 55, a plurality of second side walls 56, and a first annular rib 590. The bottom plate 41 is spaced apart from and opposite to the bottom plate 51, and the first sidewall 52 is connected between the bottom plate 41 and the baffle plate 53. The first side wall 52 extends downwards from the bottom plate 51 and is in a circular arc shape; the second side wall 56 extends downwards from the bottom plate 51 and is in an arc shape; the first side wall 52 and the second side wall 56 are arranged around the center pillar 40, and the inner diameter of the second side wall 56 is larger than the outer diameter of the first side wall 52; the first blocking wall 55 is connected between the bottom plate 51 and the baffle plate 53, and the first blocking wall 55 is vertically and integrally connected to the bottom plate 51. The first sidewall 52, the second sidewall 56, the baffle 53, the opening 54, the first blocking wall 55, and the first annular rib 590 are located in the recessed area 50, the outer diameter of the cover 7 is smaller than the inner diameter of the recessed area 50, and the cover 7 is located or partially located in the recessed area 50. The bottom plate 51 is provided with a plurality of through holes 570 penetrating through the bottom plate 51 corresponding to the baffle plates 53 on the periphery of the first side wall 52, and sliding grooves 571 located on the periphery of the first side wall 52 are formed between the through holes 570 and the baffle plates 53 at intervals, or sliding grooves 571 located on the periphery of the first side wall 52 are formed between the bottom plate 51 and the baffle plates 53 at intervals; the first side wall 52 and the baffle 53 each form one wall of the chute 571. The projection of the shutter 53 along a line parallel to the axis of rotation of the lid 7 is covered by the projection of the corresponding through opening 570 along the line, which makes it difficult to demold the shutter 53 when molding, since the shutter 53 is located in the recessed area 50, the provision of the through opening 570 facilitates the demolding of the shutter 53 along the axis B when molding, making the molding of the shutter 53 easy; the baffle 53 is provided with a first guiding inclined surface 530 for guiding the protrusion 72 to enter the opening 54 and a second guiding inclined surface (not shown) for guiding the protrusion 72 to leave the opening 54, the first guiding inclined surface 530 is positioned at the lower side of the second guiding inclined surface and is splayed with the second guiding inclined surface; the projection 72 is completely confined inside the opening 54 after passing through the opening 54, the circumferential dimension of the opening 54 being smaller than the circumferential dimension of the projection 72; when the cover 7 is detached from the end cap 6, a certain external force is applied, and the protrusion 72 can expand the opening 54 to a certain extent under the guidance of the second guiding slope, so as to be separated from the opening 54. In this embodiment, the protrusion 72 can be inserted into the opening 54 along the axis B during assembly, so that the opening 54 has a certain retention force on the protrusion 72, which is beneficial for the cover 7 to be retained on the end cap 6 when the protrusion 72 is at the position of the opening 54; the projection 72 is provided at both sides thereof with sixth guide slopes 720 for guiding the projection 72 to be fitted into the opening 54. The baffle 53 and the clamp 61 are positioned on opposite sides of the first sidewall 52; the baffle 53 extends radially outward from each first sidewall 52. The slot 571 extends along a circumferential direction around the axis B, the slot 571 is arc-shaped, and the baffle 53 is perpendicular to the axis B. The sliding slot 571 and the protrusion 72 are located radially outside the first sidewall 52.

The clamping member 61 extends from the first sidewall 52, further, the clamping member 61 extends integrally from the corresponding first sidewall 52, the first sidewall 52 is arc-shaped, and the elastic portion 63 of the clamping member 61 is integrally connected to the first sidewall 52. The outer edge of the second side wall 56 is on the same circumference (i.e., the outer diameter of both is equal) as the outer edge of the baffle 53. Each first side wall 52 is arranged to intersect each second side wall 56, each baffle 53 is arranged to intersect each second side wall 56, one end of each second side wall 56 is spaced apart from one end of each baffle 53 to form the opening 54, the first baffle wall 55 has a first side edge 551 facing away from the center pillar 40 and a second side edge 550 located between the first side edge 551 and the center pillar 40, the first side wall 52 extends from the second side edge 550 against the rotation direction a, and the second side wall 56 extends from the first side edge 551 along the rotation direction a. The first blocking wall 55 and the opening 54 are located at opposite ends of the sliding groove 571, and the protrusion 72 is limited to rotate between the first blocking wall 55 and the opening 54, so that the rotation angle of the cover body 7 relative to the end cap 6 is limited. The first blocking wall 55 and the opening 54 are located at opposite ends of the blocking plate 53. The second side wall 56 is provided with a fifth guiding slope 560 for guiding the protrusion 72 into the opening 54, the fifth guiding slope 560 and the first guiding slope 530 are located at two opposite sides of the opening 54, and the fifth guiding slope 560 and the second guiding slope are located at two opposite sides of the opening 54.

The lid body 7 is provided with a lid plate 73, an annular peripheral wall 71 integrally connected to the outer periphery of the lid plate 73, and a plurality of the aforementioned projections 72 extending radially inward from the peripheral wall 71. When the cover 7 is mounted, the projection 72 can enter the chute 571 from the opening 54 along the direction parallel to the axis B; when the projection 72 is located in the sliding slot 571, the baffle 53 abuts against the projection 72 and is located between the projection 72 and the cover plate 73; an annular flange 710 is formed by extending the upper end edge of the peripheral wall 71 radially outward, the flange 710 is provided with an annular groove 711 recessed in the direction away from the bottom plate 51, the end hole 60, each first side wall 52 and each through opening 570 are located in the area encircled by the first annular rib 590, and the first annular rib 590 enters the annular groove 711 and presses the sealing ring 8 in the annular groove 711 in the direction away from the bottom plate 51. A first annular rib 590 may also be provided on the cover 7 and, correspondingly, an annular groove 711 in the end cap 6. The end holes 60 are irregular, the projection of the clamping piece 61 along the axis B is covered by the projection of the end holes 60 along the axis B, and because the clamping piece 61 is located in the concave area 50, the clamping piece 61 is difficult to demold during molding, so that the end holes 60 are provided for the center pillar 40 to pass through, and have the function of facilitating demolding during molding of the clamping piece 61, so that the baffle 53 is easy to mold. During the rotation process of the cover 7 around the center pillar 40 along the rotation direction a, the protrusion 72 can rotate along the sliding groove 571 with the cover 7, when the protrusion 72 further screws the cover 7 after rotating to the first blocking wall 55 along the sliding groove 571, the protrusion 72 can push the first blocking wall 55 to drive the end cap 6 and the clamping member 61 to rotate, so as to drive the rib 610 to rotate and climb along the thread 400, during the climbing process of the rib 610 along the thread 400, the cover 7 moves upwards along with the protrusion, and the baffle 53 pushes the protrusion 72 upwards. The stop plate 53 is used to stop at one side of the protrusion 72 to prevent the cover 7 from separating from the end cap 6, and further, the stop plate 53 is used to stop at the lower side of the protrusion 72 to prevent the cover 7 from separating downward from the end cap 6.

The annular peripheral wall 71 and the cover plate 73 form a receiving cavity, the pushing portion 70 is received in the receiving cavity and integrally extends upward from the cover plate 73, and the protrusion 72 is received in the receiving cavity and integrally extends from the peripheral wall 71. The pushing portion 70 extends in a direction parallel to the axis B, and the projection 72 extends in a direction perpendicular to the axis B. The baffle plate 53, the first side wall 52, the second side wall 56 and the clamping piece 61 are contained in the containing cavity. The cover 7 is further provided with a plurality of reinforcing ribs 76, the reinforcing ribs 76 are connected between the cover plate 73 and the pushing portion 70, and the reinforcing ribs 76 are also connected between the annular peripheral wall 71 and the pushing portion 70.

The first blocking rib 700 is disposed on one side of the pushing portion 70 facing the center pillar 40, the pushing portion 70 is disposed with a pressing surface 701 for pressing the cam surface 62, the pressing surface 701 is a curved surface matched with the cam surface 62, the first blocking rib 700 protrudes from the pressing surface 701, the pressing surface 701 may be circular arc or non-circular arc, and the pressing surface 701 is preferably: the closer the abutting surface 701 is to the axis B, the closer the region of the elastic portion 63 of the corresponding clamp 61 is. During the climbing of the rib 610 along the thread 400, the clamping member 61 pushes the first blocking rib 700 on the upper side thereof upwards.

The cover 7 is further provided with a second stopper rib 702 located on the lower side of the holding member 61, and the holding member 61 and the second stopper rib 702 abut on each other up and down or have an up and down gap, and when the holding member 61 is in a state of clamping the center pillar 40 and/or when the projection 72 is located in the opening 54, the projection portions of the holding member 61 and the second stopper rib 702 along the axis B overlap, so that the second stopper rib 702 stops the holding member 61 to suppress downward deflection of the holding member 61. The clearance between the second rib 702 and the holder 61 along the axis B is 0mm to 3mm, preferably 0.5mm or 1 mm. The second rib 702 is connected between the pushing portions 70. The second rib 702 extends from the cover plate 73 along a direction parallel to the axis B and is connected between the pushing portions 70. The threaded portion 403 enters the space surrounded by the second rib 702.

The end cap 6 is further provided with a plurality of guides 74 and a second annular rib 75. The guiding member 74 is located inside the end cap 6 and distributed around the end hole 60, and the guiding member 74 is provided with a fourth guiding inclined surface 740 for guiding the center pillar 40 to be inserted into the end hole 60. The end holes 60 and the guides 74 are located within the range defined by the second annular rib 75, the guides 74 are integrally connected to the second annular rib 75, the projection of the first sidewall 52 along the axis B is covered by the projection of the second annular rib 75 along the axis B, the through opening 570 is also located at the periphery of the second annular rib 75, and the second annular rib 75 is circular. The through opening 570 communicates between the sliding groove 571 and the inner space of the filter cartridge 92, the filter cartridge 92 has an accommodating space 921 for accommodating the filter holder 4, the accommodating space 921 belongs to the inner space of the filter cartridge 92, the through opening 570 communicates between the sliding groove 571 and the accommodating space 921, and the accommodating space 921 and the cover body 7 are located on opposite sides of the end cap 6.

Fig. 16 to 22 show a modification of the cover 7 and the end cap 6 of the vacuum cleaner of the present invention, which mainly includes adding some features to the cover 7 and the end cap 6.

Referring to fig. 16 to 22, another modified cover 7 and end cap 6 are provided, and the cover 7 and end cap 6 in fig. 16 to 22 are mainly modified as follows: the cover body 7 is added with a pointing arrow 770, a first interference part 78 and an extension part 771; the end cap 6 adds a second blocking wall 94, a second interference portion 95, and a third interference portion 96; this may also be the case: the first interference portion 78 is provided in the lid 7, and the second and

third interference portions

95 and 96 are provided in the end cap 6.

The directional arrow 770 not only indicates the angular position (e.g., lock position, unlock position) of the cap 7 relative to the end cap 6, but also facilitates the hand to hold and apply force to screw the cap 7 since the radial ends (arrow end 773 and non-arrow end 774) of the directional arrow 770 radially protrude beyond the annular peripheral wall 71 of the cap 7.

The rotation axis of the lid 7, that is, the center axis around which the lid 7 rotates, is a virtual line, and the radial direction in the present invention can be regarded as the radial direction of the lid 7, and the radial direction is perpendicular to and intersects with the rotation axis of the lid 7, and in the present embodiment, the axis B is the center line of the center pillar 40, the rotation axis of the lid 7, and the center line of the filter cartridge 92. The protrusion 72 can rotate along the sliding groove 571 between the first blocking wall 55 and the second blocking wall 94, after the protrusion 72 rotates to the first blocking wall 55 along the rotation direction a, the first blocking wall 55 blocks the protrusion 72 to prevent the cover 7 from further rotating relative to the end cap 6 along the rotation direction a, after the protrusion 72 rotates to the second blocking wall 94 opposite to the rotation direction a, the second blocking wall 94 blocks the protrusion 72 to prevent the cover 7 from further rotating relative to the end cap 6 opposite to the rotation direction a, and the first blocking wall 55 and the second blocking wall 94 are located at two opposite ends of the sliding groove 571 and are opposite to each other in the rotation direction a. The first blocking wall 55 and the second blocking wall 94 are respectively connected between the first side wall 52 and the second side wall 56, and further, the first blocking wall 55 and the second blocking wall 94 are respectively connected between one end of the first side wall 52 and one end of the second side wall 56. The first side walls 52 and the second side walls 56 jointly surround the rotation axis of the cover 7, the first side walls 52 are staggered with the second side walls 56, the second blocking walls 94 respectively include third side edges 940 facing away from the rotation axis of the cover 7 and fourth side edges 941 located between the third side edges 940 and the rotation axis of the cover 7, the first side walls 52 respectively connect the second side edges 550 and the fourth side edges 941, the second side walls 56 respectively connect the first side edges 551 and the third side edges 940, the first side walls 52 respectively extend from the fourth side edges 941 of the second blocking walls 94 along the rotation direction a, and the second side walls 56 respectively extend from the third side edges 940 of the second blocking walls 94 opposite to the rotation direction a. The first sidewall 52 is located radially inward of the slide groove 571.

The extension 771 extends into the opening 570 and during rotation of the cover 7 relative to the cap 6, the extension 771 follows the rotation of the cover 7 and is limited to rotation between opposite ends of the opening 570. in this arrangement, rotation of the cover 7 relative to the cap 6 is limited. The receiving space 921 and the cover 7 are located on opposite sides of the end cap 6. The extension 771 is integrally connected to the projection 72, and the extension 771 extends upward from the projection 72. The extension 771 extends from the projection 72 in a direction approaching the housing space 921, and the extension 771 is parallel to the rotation axis of the cover 7. The opening 570 is circular arc shaped. The projection 72 has a first side and a second side opposite to each other, the stop 53 is used for stopping at the first side of the projection 72 to prevent the cover 7 from separating from the end cap 6, the extending portion 771 extends from the second side of the projection 72 in a direction away from the stop 53, in this embodiment, the first side of the projection 72 is a lower side, and the second side of the projection 72 is an upper side. When the cover 7 is mounted on the end cap 6, the protrusion 72 enters the sliding groove 571 from the opening 54, and the extension 771 passes through the opening 54 and the sliding groove 571 in sequence and enters the through opening 570. The end of the extension 771 is provided with a seventh guiding slope 772 for guiding the extension 771 into the through opening 570 when the cover 7 is mounted on the end cap 6.

The opening 570 has the circular arc-shaped outer side edge 572, the extending part 771 is located at the radial inner side of the outer side edge 572, when the extending part 771 is at any position between the two opposite ends of the opening 570, the extending part 771 can contact with the outer side edge 572 by contacting with the outer side edge 572 or moving radially outward by a first distance, the first distance is 0mm to 1.2mm, and the first distance is preferably 0.2mm, 0.4mm, or 0.6 mm. The radially outward movement of the extension 771 is for convenience and to accurately describe the specific spacing between the extension 771 and the outer side 572 for descriptive purposes and does not really have to move the extension 771 radially outward. The opening 570 further has an inner side edge (not numbered) in a circular arc shape radially opposite to the outer side edge 572, the extending portion 771 is located radially outside the inner side edge, and when the extending portion 771 is located at any position between opposite ends of the opening 570, the extending portion 771 moves radially inward by a second distance to be in contact with the inner side edge, and the second distance is greater than the first distance. The second distance is 1.3mm-3.1mm, preferably 1.8mm, 2mm, 2.5 mm. The inner edge of the opening 570 has been seamlessly joined to the outer surface of the first sidewall 52, the inner edge forming a portion of the outer surface of the first sidewall 52. In the above, in order to restrict and suppress the excessive radial deviation of the cover 7 by the outer edge, the excessive radial deviation of the cover 7 may be restricted and suppressed by the inner edge and the extending portion 771: the distance between the extension 771 and the inner side is set to be small, so that the second distance between the extension 771 and the inner side is 0mm-1.2mm when the extension 771 rotates along with the cover 7. The cover 7 may be provided with a plurality of extending portions 771 for limiting and suppressing the radial over-displacement of the cover 7, each extending portion 771 extends into the corresponding through opening 570, the distance between each extending portion 771 and the rotation axis of the cover 7 is the same, each extending portion 771 is uniformly distributed on a circumference around the rotation axis of the cover 7, and one extending portion 771 and the other extending portion 771 are on opposite sides of the rotation axis of the cover 7. The opening 570 has a first end and a second end opposite to each other in the rotation direction a of the cover 7, and the extension 771 is restricted from rotating between the first end and the second end during the rotation of the cover 7 relative to the cap 6. The first blocking wall 55 is located at a first end of the through opening 570, and a second end of the through opening 570 is located between the first blocking wall 55 and the second blocking wall 94 in the rotation direction a.

The cover 7 further has a first interference position (see fig. 16) and a second interference position (see fig. 18) relative to the end cap 6, the interference position of the present invention is a position where the cover 7 interferes with the end cap 6 during rotation, when the cover 7 is at the first angular position, the plurality of clamping members 61 clamp the center post 40, when the cover 7 is at the second angular position, the plurality of clamping members 61 do not clamp the center post 40, when the cover 7 rotates from the second angular position to the first angular position along the rotation direction a, the cover 7 pushes the plurality of clamping members 61 to move toward the center post 40 so that the plurality of clamping members 61 clamp the center post 40, the cover 7 can rotate from the first angular position to the second angular position against the rotation direction a sequentially through the first interference position and the second interference position, the cover 7 can rotate from the second angular position to the first angular position along the rotation direction a sequentially through the second interference position and the first interference position, when the cover 7 rotates in the process of first interference, the cover 7 interferes with the end cap 6, and when the cover 7 rotates in the process of second interference, the cover 7 interferes with the end cap 6. So design, at lid 7 for end cap 6's normal rotation in-process, take place to interfere through lid 7 and end cap 6 in appropriate position, play the suggestion effect, can remind operator lid 7 or what kind of position that will go to, promote user experience. In the process of rotating the cover 7 relative to the end cap 6 between the first interference position and the second interference position, the cover 7 does not pass through other interference positions and rotates relatively smoothly relative to the end cap 6. When the cover 7 passes through the first interference position, the plurality of holding members 61 are in a state of holding the center pillar 40, and when the cover 7 passes through the second interference position, the plurality of holding members 61 do not hold the center pillar 40.

One of the cover 7 and the end cap 6 is provided with a first interference portion 78, the other of the cover 7 and the end cap 6 is provided with a second interference portion 95 and a third interference portion 96, when the cover 7 passes through the first interference position, the first interference portion 78 interferes with the second interference portion 95, and when the cover 7 passes through the second interference position, the first interference portion 78 interferes with the third interference portion 96. Further, the first interference portion 78 is disposed on the cover 7 and integrally extends from the cover plate 73, the first interference portion 78 extends in a direction close to the receiving space 921, the second interference portion 95 and the third interference portion 96 are respectively protrusions disposed on the end cap 6, and the second interference portion 95 and the third interference portion 96 are respectively integrally connected to the bottom plate 41 and protrude from the bottom plate 41.

The first interference portion 78 is provided with a first guide surface 780 and a second guide surface 781, the first guide surface 780 interferes with the second interference portion 95 when the cover 7 passes through the first interference position against the rotation direction a, the second guide surface 781 interferes with the second interference portion 95 when the cover 7 passes through the first interference position against the rotation direction a, the first guide surface 780 interferes with the third interference portion 96 when the cover 7 passes through the second interference position against the rotation direction a, and the second guide surface 781 interferes with the third interference portion 96 when the cover 7 passes through the second interference position against the rotation direction a. The first guide surface 780 and the second guide surface 781 form a figure of eight. The second interference portion 95 includes a third guide surface 950 and a fourth guide surface 951, and the third interference portion 96 includes a fifth guide surface 960 and a sixth guide surface 961. When the cover 7 passes the first interference position against the rotation direction a, the third guide surface 950 interferes with the first interference portion 78, specifically, the third guide surface 950 interferes with the first guide surface 780 of the first interference portion 78; when the cover 7 passes through the first interference position in the rotation direction a, the fourth guide surface 951 interferes with the first interference portion 78, specifically, the fourth guide surface 951 interferes with the second guide surface 781 of the first interference portion 78; when the cover 7 passes the second interference position against the rotation direction a, the fifth guide surface 960 interferes with the first interference portion 78, specifically, the fifth guide surface 960 interferes with the first guide surface 780 of the first interference portion 78; when the cover 7 passes through the second interference position in the rotation direction a, the sixth guide surface 961 interferes with the first interference portion 78, specifically, the sixth guide surface 961 interferes with the second guide surface 781 of the first interference portion 78. The third guide surface 950 and the fourth guide surface 951 form a figure of eight, and the fifth guide surface 960 and the sixth guide surface 961 form a figure of eight. The second interference portion 95 is integrally connected to one of the first side walls 52, the third interference portion 96 is integrally connected to one of the second side walls 56, and further, the second interference portion 95 is integrally connected to an inner side surface of one of the first side walls 52, and the third interference portion 96 is integrally connected to an inner side surface of one of the second side walls 56. The circle on which the first side wall 52 lies is coaxial with the circle on which the second side wall 56 lies, and the diameter of the first side wall 52 is larger than the diameter of the second side wall 56. One of the pushing portions 70 is disposed in parallel with the first interference portion 78, and a reinforcing rib 782 is connected between the first interference portion 78 and the first interference portion 78, and the first interference portion 78 is in a cylindrical shape parallel to the rotation axis of the lid body 7. The first guide surface 780, the second guide surface 781, the third guide surface 950, the fourth guide surface 951, the fifth guide surface 960, and the sixth guide surface 961 are perpendicular to the bottom plate 41, respectively, and the first guide surface 780, the second guide surface 781, the third guide surface 950, the fourth guide surface 951, the fifth guide surface 960, and the sixth guide surface 961 are parallel to the rotation axis of the bottom plate cover 7, respectively.

When the cover body 7 rotates in the process of passing through the first interference position, the force required for screwing the cover body 7 is discontinuously increased, and when the cover body 7 rotates in the process of passing through the second interference position, the force required for screwing the cover body 7 is also discontinuously increased, and the discontinuous increase, namely, the required force is not gently changed, is not kept unchanged, but is increased in jumping. The difference in rotation angle between the first angular position and the first interference position is 0.01 degrees to 19 degrees (i.e. the cover 7 is rotated 0.01 degrees to 19 degrees from the first angular position to reach the first interference position and vice versa), preferably 0.1 degrees, 0.9 degrees, 2 degrees, 5 degrees, the difference in rotation angle between the second angular position and the second interference position is 0.01 degrees to 19 degrees, preferably 0.1 degrees, 0.9 degrees, 2 degrees, 5 degrees, the difference in rotation angle between the first angular position and the second angular position is 50 degrees to 100 degrees, preferably 53 degrees, 60 degrees, 68 degrees, 70 degrees. The difference of the rotation angle between the first angle position and the first interference position is very small, so that the cover 7 enters the first angle position just after passing through the first interference position along the rotation direction a, further, the cover 7 enters the first angle position after passing through the first interference position along the rotation direction a, and the first interference position and the first angle position are tightly connected by the design; the difference in the rotation angle between the second angular position and the second interference position is very small, so that the cover 7 enters the second angular position just after passing through the second interference position against the rotation direction a, and further, the cover 7 enters the second angular position after passing through the second interference position against the rotation direction a, and thus the second interference position and the second angular position are closely connected. The existence of first interference position makes the lid be difficult for deviating from first angular position to do benefit to lid 7 and keep in first angular position, the existence of second interference position makes the lid be difficult for deviating from second angular position, thereby does benefit to lid 7 and keeps in second angular position. When the cover body 7 rotates in the first interference position, the cover body 7 interferes with the end cap 6 to generate a relatively obvious sound of interference friction, and when the cover body 7 rotates in the second interference position, the cover body 7 interferes with the end cap 6 to generate a relatively obvious sound of interference friction, so that the above sound can also play a role in prompting.

In other embodiments, it is also possible to provide that: the cover 7 is provided with a first interference part and a second interference part, the end cap 6 is provided with a third interference part and a fourth interference part, the first interference part interferes with the third interference part when the cover 7 passes through a first interference position, and the second interference part interferes with the fourth interference part when the cover 7 passes through a second interference position.

The first blocking wall 55 and the second blocking wall 94 are located at opposite ends of the sliding slot 571, the first blocking wall 55 and the second blocking wall 94 are opposite to each other in the rotation direction a, the protrusion 72 can be limited to rotate between the first blocking wall 55 and the second blocking wall 94 along the sliding slot 571, after the protrusion 72 rotates along the rotation direction a to the first blocking wall 55, the first blocking wall 55 blocks the protrusion 72 to prevent the cover 7 from further rotating along the rotation direction a relative to the end cap 6, after the protrusion 72 rotates against the rotation direction a to the second blocking wall 94, the second blocking wall 94 blocks the protrusion 72 to prevent the cover 7 from further rotating against the rotation direction a relative to the end cap 6, and through the first blocking wall 55 and the second blocking wall 94, the rotation range of the cover 7 relative to the end cap 6 is effectively limited, which is beneficial to avoiding the cover 7 from being screwed too many turns by a user, thereby improving the user experience. The end cap 6 has a plurality of first blocking walls 55 and a plurality of second blocking walls 94, and the first sidewall 52 is connected between the first blocking walls 55 and the second blocking walls 94. The first sidewall 52, the first blocking wall 55, and the second blocking wall 94 are integrally connected to the bottom plate 41, respectively, the first sidewall 52, the first blocking wall 55, the second blocking wall 94, and the blocking plate 53 are located on one side of the bottom plate 41, and the accommodating space 921 is located on the opposite side of the bottom plate 41. The first sidewall 52, the first blocking wall 55 and the second blocking wall 94 are perpendicular to the bottom plate 41, and the blocking plate 53 is parallel to the bottom plate 41. The angle through which the projection 72 is rotated from the first blocking wall 55 to the second blocking wall 94 is 75 to 105 degrees, preferably 90 degrees.

In fig. 16, the annular groove 711 ' is opened in the end cap 6, and the third annular rib 712 of the annular peripheral wall 71 enters the annular groove 711 ' and abuts against the seal ring 8 in the annular groove 711 '; a second annular groove 714 is formed between the third annular rib 712 and the fourth annular rib 713 of the annular peripheral wall 71, and a fifth annular rib 715 of the end cap 6 is retained in the second annular groove 714. The annular peripheral wall 71, the third annular rib 712, the annular groove 711', the fourth annular rib 713, the second annular groove 714, and the fifth annular rib 715 are each annular with the rotation axis of the lid body 7 as the center axis.

While the present invention has been described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Any modification which does not depart from the functional and structural principles of the present invention is intended to be included within the scope of the claims.

Claims

1. A dust collector comprises a filter support, a filter cartridge sleeved outside the filter support, an end cap connected with the filter cartridge, and a cover body assembled on the end cap, and is characterized in that: the cover body can rotate relative to the end cap, the end cap is provided with a sliding groove, a first blocking wall and a second blocking wall, the first blocking wall and the second blocking wall are positioned at two opposite ends of the sliding groove, the cover body is further provided with a convex block, the convex block can be limited between the first blocking wall and the second blocking wall along the sliding groove to rotate, the convex block rotates along a rotation direction to the first blocking wall, the first blocking wall blocks the convex block to prevent the cover body from continuously rotating relative to the end cap along the rotation direction, the convex block rotates to the second blocking wall along the rotation direction, the second blocking wall blocks the convex block to prevent the cover body from continuously rotating relative to the end cap along the rotation direction, and the first blocking wall is opposite to the second blocking wall in the rotation direction; the filter cartridge has an accommodating space for accommodating the filter support, the end cap is further provided with a bottom plate, the bottom plate is provided with a through hole penetrating through the bottom plate, the through hole is communicated between the sliding groove and the accommodating space, the cover body is further provided with an extending portion extending into the through hole, in the rotating process of the cover body relative to the end cap, the extending portion rotates along with the cover body and is limited to rotate between a first end of the through hole and a second end of the through hole, the first end and the second end are opposite to each other in the rotating direction, the through hole is provided with a circular arc-shaped outer side edge, the extending portion is located on the radial inner side of the outer side edge, when the extending portion is located at any position between the opposite two ends of the through hole, the extending portion is in contact with the outer side edge or moves radially outwards by a first distance, the first.

2. The vacuum cleaner of claim 1, wherein: the end cap is provided with a plurality of sliding grooves, a plurality of first blocking walls and a plurality of second blocking walls, the end cap is further provided with a plurality of first side walls and a plurality of second side walls, each first side wall and each second side wall jointly surround the rotation axis of the cover body, each first side wall and each second side wall are distributed in a staggered mode, and the first blocking walls and the second blocking walls are respectively connected between the first side walls and the second side walls.

3. The vacuum cleaner of claim 2, wherein: each first blocking wall comprises a first lateral edge departing from the rotation axis of the cover body and a second lateral edge positioned between the first lateral edge and the rotation axis of the cover body, each second blocking wall comprises a third lateral edge departing from the rotation axis of the cover body and a fourth lateral edge positioned between the third lateral edge and the rotation axis of the cover body, each first lateral wall is connected with the second lateral edge of the first blocking wall and the fourth lateral edge of the second blocking wall, and each second lateral wall is connected with the first lateral edge of the first blocking wall and the third lateral edge of the second blocking wall.

4. The vacuum cleaner of claim 2, wherein: each first blocking wall comprises a first lateral edge deviating from the rotation axis of the cover body and a second lateral edge positioned between the first lateral edge and the rotation axis of the cover body, each second blocking wall comprises a third lateral edge deviating from the rotation axis of the cover body and a fourth lateral edge positioned between the third lateral edge and the rotation axis of the cover body, each first lateral wall extends from the second lateral edge of the first blocking wall against the rotation direction, each second lateral wall extends from the first lateral edge of the first blocking wall along the rotation direction, each first lateral wall extends from the fourth lateral edge of the second blocking wall along the rotation direction, and each second lateral wall extends from the third lateral edge of the second blocking wall against the rotation direction.

5. The vacuum cleaner of claim 1, wherein: the end cap is provided with a plurality of sliding grooves, a plurality of first blocking walls and a plurality of second blocking walls, the cover body is provided with a plurality of protruding blocks, the end cap is further provided with a plurality of openings and a plurality of baffle plates, the baffle plates are used for stopping one side of the protruding blocks to prevent the cover body from being separated from the end cap, the openings are formed between one ends of the corresponding baffle plates and the second blocking walls, and the protruding blocks respectively enter the sliding grooves from the openings when the cover body is installed on the end cap.

6. The vacuum cleaner of claim 1, wherein: the end cap is provided with a plurality of sliding grooves, a plurality of first blocking walls and a plurality of second blocking walls, the filter support is provided with a center pillar, the cover body can rotate around the center pillar along and against the rotating direction, the end cap is provided with a plurality of clamping pieces, in the rotating process of the cover body relative to the end cap along the rotating direction, the cover body pushes the clamping pieces to move towards the center pillar so that the clamping pieces clamp the center pillar, the end cap is further provided with a plurality of first side walls, the clamping pieces respectively extend integrally from the corresponding first side walls, and the first side walls are connected between the first blocking walls and the second blocking walls.

7. The vacuum cleaner of claim 6, wherein: the cover body is provided with a plurality of abutting parts for abutting against the clamping pieces, the cover body is provided with a plurality of convex blocks, each abutting part respectively abuts against and pushes the corresponding clamping piece to move towards the middle column in the rotating process of the cover body relative to the end cap along the rotating direction, the cover body is provided with a cover plate and an annular peripheral wall integrally connected to the periphery of the cover plate, the abutting parts respectively integrally extend from the cover plate, the convex blocks respectively integrally extend from the side plates, the end cap is provided with a through end hole, and the middle column penetrates through the end hole to enter the cover body.

8. The vacuum cleaner of claim 1, wherein: the end cap is further provided with a first side wall and a baffle plate extending from the first side wall, and the baffle plate stops at one side of the projection to prevent the cover body from being separated from the end cap.

9. The vacuum cleaner of claim 8, wherein: the first side wall, the first blocking wall and the second blocking wall are respectively and integrally connected to the bottom plate, the bottom plate and the baffle plates are arranged at intervals, the first side wall, the first blocking wall, the second blocking wall and the baffle plates are arranged on one side of the bottom plate, and the accommodating space is arranged on the other side, opposite to the bottom plate.

10. The vacuum cleaner of claim 9, wherein: the first side wall, the first retaining wall and the second retaining wall are perpendicular to the bottom plate respectively, and the retaining plates are parallel to the bottom plate.

11. The vacuum cleaner of claim 9, wherein: the through opening is opposite to the baffle.

12. The vacuum cleaner of claim 11, wherein: the projection of the baffle along a line parallel to the axis of rotation of the cover is covered by the projection of the opening along the line.

13. The vacuum cleaner of claim 11, wherein: the opening still has the radial inside edge of the circular arc relative with the outside limit, the extension is located the radial outside of inside limit, when the extension was in the arbitrary position between the opposite both ends of opening, the extension radially inwards move a second distance can with the inboard limit contact, the second distance is greater than first distance.

14. The vacuum cleaner of claim 13, wherein: the through opening is arc-shaped, and the extension part is parallel to the rotation axis of the cover body.

15. The vacuum cleaner of claim 11, wherein: the first blocking wall is located at the first end of the through opening, and the second end of the through opening is located between the first blocking wall and the second blocking wall in the rotating direction.

16. The vacuum cleaner of claim 8, wherein: the first side wall and the baffle plate respectively form a groove wall of the sliding groove, and the sliding groove and the convex block are located on the radial outer side of the first side wall.

17. The vacuum cleaner of claim 1, wherein: the angle of the lug rotating from the first blocking wall to the second blocking wall is 75-105 degrees.

18. A filter assembly for a vacuum cleaner comprising a filter cartridge, an end cap connected to and shielded from one end of the filter cartridge, an end ring connected to the other end of the filter cartridge, the end cap having an end opening therethrough, the filter assembly comprising: the filter assembly further comprises a cover body which is rotatably retained on the outer side of the end cap, the cover body covers the end hole, the end cap is provided with a sliding groove, a first blocking wall and a second blocking wall, the first blocking wall and the second blocking wall are positioned at two opposite ends of the sliding groove, the cover body is provided with a convex block, the convex block can be limited to rotate between the first blocking wall and the second blocking wall along the sliding groove, the convex block rotates along a rotating direction to the first blocking wall, the first blocking wall blocks the convex block to prevent the cover body from continuously rotating relative to the end cap along the rotating direction, the convex block rotates to the second blocking wall along the rotating direction, the second blocking wall blocks the convex block to prevent the cover body from continuously rotating relative to the end cap along the rotating direction, and the first blocking wall and the second blocking wall are opposite to; the end cap still is equipped with the bottom plate, the bottom plate is equipped with the opening that link up the bottom plate, the opening communicates between the inner space of spout and cartridge filter, the lid still is equipped with the extension that extends into the opening, the lid rotates the in-process for the end cap, the extension follows the lid and rotates and be limited to between the first end of opening and the second end of opening and rotate, first end with the second end is relative in the direction of rotation, the opening has convex outside limit, the extension is located the radial inboard on outside limit, when the arbitrary position of extension between the opposite both ends of opening, the extension can contact with outside limit contact or radial outside removal a first distance, first distance is 0mm-1.2mm, the extension extends from lug an organic whole.

19. The filter assembly of claim 18, wherein: the end cap further comprises a first side wall and a baffle plate extending from the first side wall, the baffle plate stops at one side of the bump to prevent the cover body from being separated from the end cap, the end cap is provided with a clamping piece, the cover body pushes the clamping piece to move towards the rotation axis of the cover body in the rotating process of the cover body relative to the end cap along the rotation direction, and the clamping piece extends from the first side wall integrally.