CN219186083U - Filter core locking means and filter core structure - Google Patents

Abstract

The embodiment of the utility model provides a filter element locking device and a filter element structure, and relates to the technical field of filter element locking. The filter element structure comprises a filter element locking device, and the filter element locking device comprises a middle frame and a locking assembly. The middle frame is provided with a mounting space for mounting the filter element and coaxial with the middle frame, and the side wall of the middle frame is also provided with a fixing groove communicated with the mounting space. The locking assembly comprises a base, a knob and a locking piece, wherein the base is used for being installed in an installation space, the locking piece is connected with the base, the knob is connected with the locking piece and can drive the locking piece to rotate, and when the knob rotates, the locking piece can be driven to be clamped into a fixed groove or retract into the installation space from the fixed groove. Under the action of the knob, whether the locking piece is positioned in the fixed groove or not can be controlled so as to control the filter element to be in a locking state or an unlocking state. The filter element is prevented from being screwed with the shell, and the user can conveniently detach the user from the middle frame through screwing, matching between the locking piece and the fixing groove, so that the experience of the user is improved.

Description

Filter core locking means and filter core structure

Technical Field

The utility model relates to the technical field of filter element locking, in particular to a filter element locking device and a filter element structure.

Background

The inventor researches show that at present, the water purifier on the market generally needs to replace the filter element after being used for a period of time so as to ensure the quality of filtered water. When changing the filter core, because the filter core of traditional purifier is screwed up with the casing installation after, user or after sales personnel are when manual dismantlement, are difficult to dismantle the filter core from the casing, dismantle and change the filter core inconvenient, user experience is not good.

Disclosure of Invention

The utility model aims to provide a filter element locking structure which can improve convenience in disassembly of a filter element and improve experience of a user.

Embodiments of the present utility model are implemented as follows:

in a first aspect, the present utility model provides a cartridge locking device comprising:

the middle frame is provided with an installation space for installing the filter element and coaxial with the middle frame, and the side wall of the middle frame is also provided with a fixed groove communicated with the installation space;

the locking assembly comprises a base, a knob and a locking piece, wherein the base is used for being installed in an installation space, the locking piece is connected with the base, the knob is connected with the locking piece and can drive the locking piece to rotate, and when the knob rotates, the locking piece can be driven to be clamped into a fixed groove or retract into the installation space from the fixed groove.

In an alternative embodiment, the locking piece comprises a cam mechanism and a sliding block, the cam mechanism is connected with the knob and is arranged on the base, the cam mechanism is used for propping against the sliding block, the sliding block is arranged on the base and can move along a first direction relative to the base, when the knob drives the cam mechanism to rotate and the long side of the cam mechanism is propped against the sliding block, the sliding block is clamped into the fixing groove, and when the knob drives the cam mechanism to rotate and the short side of the cam mechanism is propped against the sliding block, the sliding block is retracted into the installation space.

In an alternative embodiment, cam mechanism includes cam and four elastic component, two sliders are located the cam both sides, the quantity of slider and fixed slot is two, two sliders and two fixed slots are about the preset plane symmetry setting of crossing the center axis and arrange along first direction, be provided with two first fixed columns and first fixed column are located between two sliders on the base, the cam is located between two first fixed columns, and two first fixed columns set up along the second direction interval, all be provided with two second fixed columns of arranging along the second direction interval on the slider, the second direction is perpendicular with first direction, the both ends of elastic component are connected with first fixed column and second fixed column respectively and extend along first direction, the orthographic projection of cam on the base is oval form and the center of cam passes through the axis of center.

In an alternative embodiment, a roller groove is formed in one side, close to the cam, of the slider, a roller is arranged in the roller groove, the roller can rotate along the axis of the roller relative to the slider, the rotation axis of the roller is parallel to the rotation axis of the cam, and the roller abuts against the outer wall of the cam.

In an alternative embodiment, the locking member further comprises a pressing piece, the pressing piece is connected with the base, the pressing piece and the base together define a sliding space extending along the first direction, the sliding block is installed in the sliding space, and when the long edge is abutted with the roller and the long edge extends along the first direction, the roller is located between the pressing piece and the cam.

In an alternative embodiment, a plurality of ball grooves are formed in one side, close to the pressing piece, of the sliding block, and balls are installed in the ball grooves.

In an alternative embodiment, a plurality of ball grooves are also formed in the base, close to one side of the sliding block, and balls are mounted in the ball grooves and used for being abutted against the sliding block.

In optional embodiment, cam structure includes the disc, the disc has been seted up two and has been set up the cam groove about self central symmetry, the quantity of slider and fixed slot is two, two sliders and two fixed slots set up and arrange along first direction interval about the preset plane symmetry of crossing well frame axis, the slider is provided with the cam groove, locking subassembly still includes the gyro wheel, cam groove and gyro wheel groove are worn to establish in proper order to the gyro wheel, the gyro wheel can rotate along self axis and support in the cell wall of cam groove relative to the slider, when the knob drives the disc rotation, the gyro wheel slides and can drive the slider card in the cam groove or drive the slider and shrink into the installation space.

In an alternative embodiment, the knob comprises a body and an engagement post connected with the body, the locking piece is provided with a positioning groove for installing the engagement post, and the centers of the positioning groove and the engagement post are all arranged on the axis of the installation space.

In a second aspect, the present utility model provides a filter cartridge arrangement comprising a filter cartridge locking arrangement according to any one of claims 1 to 9.

The embodiment of the utility model has the beneficial effects that: the filter element locking device provided by the embodiment of the utility model comprises a middle frame and a locking assembly. The middle frame is provided with a mounting space for mounting the filter element and coaxial with the middle frame, and the side wall of the middle frame is also provided with a fixing groove communicated with the mounting space. The locking assembly comprises a base, a knob and a locking piece, wherein the base is used for being installed in an installation space, the locking piece is connected with the base, the knob is connected with the locking piece and can drive the locking piece to rotate, and when the knob rotates, the locking piece can be driven to be clamped into a fixed groove or retract into the installation space from the fixed groove. Under the action of the knob, whether the locking piece is positioned in the fixed groove or not can be controlled so as to control the filter element to be in a locking state or an unlocking state. The filter element is prevented from being screwed with the shell, and the user can conveniently detach the user from the middle frame through screwing, matching between the locking piece and the fixing groove, so that the experience of the user is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is an exploded view of a cartridge lock assembly according to a first embodiment of the present utility model;

fig. 2 is a schematic structural diagram of a slider in an unlocked state under a first view angle in a locking assembly according to a first embodiment of the present utility model;

fig. 3 is a schematic structural diagram of the slider in the lock assembly in the unlocked state under the second view angle according to the first embodiment of the present utility model;

FIG. 4 is a schematic view of a first embodiment of a structure of a slider in a locking assembly between a locked and an unlocked state at a second view angle;

FIG. 5 is a schematic view of a structure of a slider in a locking assembly according to a first embodiment of the present utility model in a locked state at a second view angle;

FIG. 6 is an exploded view of a cartridge lock assembly according to a second embodiment of the present utility model;

FIG. 7 is a schematic structural view of a slider in a locking assembly according to a second embodiment of the present utility model in a locked state at a second view angle;

FIG. 8 is a schematic view of a second embodiment of a slider in a locking assembly according to the present utility model when the slider is in a locked and unlocked state at a second angle of view;

fig. 9 is a schematic structural diagram of a slider in an unlocked state under a second view angle in a locking assembly according to a second embodiment of the present utility model.

Icon 1-cartridge lock-up device; 10-middle frame; 11-installation space; 12-a fixed groove; a 20-lock assembly; 21-a base; 211-a first fixed column; 22-a knob; 221-engagement posts; 23-locking member; 231-cam mechanism; 2311-a cam; 23111-positioning grooves; 2313-a cam slot; 232-a slider; 2321-roller slots; 2322-a roller; 2323-a second fixed column; 233-an elastic member; 24-tabletting; 25-ball grooves; 26-balls; 27-upper cover.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal," "vertical," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The specific structure of the filter element locking device and corresponding technical effects thereof provided by the embodiment of the utility model are described in detail below with reference to the accompanying patent drawings.

First embodiment:

referring to fig. 1 to 5, a filter element locking device 1 provided in an embodiment of the present utility model includes a middle frame 10 and a locking assembly 20.

Wherein the middle frame 10 is provided with a mounting space 11 for mounting the filter element and being coaxial with the middle frame, and the side wall of the middle frame 10 is also provided with a fixing groove 12 communicated with the mounting space 11. The locking assembly 20 comprises a base 21, a knob 22 and a locking piece 23, wherein the base 21 is used for being installed in the installation space 11, the locking piece 23 is connected with the base 21, the knob 22 is connected with the locking piece 23 and can drive the locking piece 23 to rotate, and when the knob 22 rotates, the locking piece 23 can be driven to be clamped into the fixed groove 12 or retract into the installation space 11 from the fixed groove 12.

It will be readily appreciated that when the filter cartridge is installed in the installation space 11 and the locking assembly 20 is located in the installation space 11, the locking assembly 20 is located at one end of the filter cartridge and is close to the fixing groove 12, and the locking member 23 can be driven to be clamped into the fixing groove 12 or retract into the installation space 11 from the fixing groove 12 under the rotation of the knob 22, when the locking member 23 is clamped into the fixing groove 12, the filter cartridge is locked into the installation space 11, and when the locking member 23 is retracted into the installation space 11 from the fixing groove 12, the filter cartridge can be taken out from the installation space 11 by a user, that is, under the action of the knob 22, whether the locking member 23 is located in the fixing groove 12 to control the filter cartridge to be in a locked or unlocked state. The filter element is prevented from being screwed with the shell, and the user can conveniently detach the user from the middle frame 10 through screwing, matching between the locking piece 23 and the fixed groove 12, so that the experience of the user is improved.

Further, in the present embodiment, the locking member 23 includes a cam mechanism 231 and a slider 232, the cam mechanism 231 is connected with the knob 22 and is disposed on the base 21, the cam 2311 is configured to abut against the slider 232, the slider 232 is disposed on the base 21 and can move along the first direction relative to the base 21, when the knob 22 drives the cam mechanism 231 to rotate and the long side of the cam mechanism 231 abuts against the slider 232, the slider 232 is clamped into the fixing slot 12, and when the knob 22 drives the cam 2311 to rotate and the short side of the cam 2311 abuts against the slider 232, the slider 232 is retracted into the installation space 11.

It should be noted that, in this embodiment, the device further includes an upper cover 27, the upper cover 27 is covered on the base 21, the upper cover 27 is provided with a through hole through which the knob 22 passes, and a space for sliding the slider 232 is provided on a side wall of the upper cover 27.

Specifically, in the present embodiment, the knob 22 includes a body and a engaging post 221 connected to the body, the locking member 23 is provided with a positioning slot 23111 for installing the engaging post 221, the positioning slot 23111 and the middle ten days of the engaging post 221 are all located on the axis of the installation space 11, it should be noted that the cam 2311 is provided with the positioning slot 23111, and the knob 22 is structurally connected with the cam 2311 through the engaging post 221.

It is easy to understand that the cam mechanism 231 has long sides and short sides, when the knob 22 rotates to drive the cam mechanism 231 to rotate, the long sides and short sides of the cam 2311 structure can be made to be in contact with the sliding block 232 alternately, when the long sides of the cam mechanism 231 are rotated to be in contact with the sliding block 232, the sliding block 232 can slide into the fixing groove 12 to fix the filter element in the installation space 11, when the knob 22 rotates to drive the cam mechanism 231 to rotate and the short sides of the cam 2311 structure are in contact with the sliding block 232, at this time, the cam mechanism 231 is retracted into the installation space 11, at this time, the filter element is in an unlocked state, and a user can take the filter element out of the installation space 11 for replacement. It can be appreciated that, through the cooperation of the knob 22, the slider 232, the cam 2311 structure and the fixing groove 12 of the middle frame 10, a user can change the locking or unlocking state of the filter element only by rotating the knob 22, so that the convenience of replacing the filter element by the user can be increased.

Specifically, in the present embodiment, the cam mechanism 231 includes a cam 2311 and four elastic members 233, the two sliders 232 are located at two sides of the cam 2311, the number of the sliders 232 and the fixing slots 12 is two, the two sliders 232 and the two fixing slots 12 are symmetrically disposed about a preset plane passing through the axis of the middle frame 10 and are arranged along a first direction, two first fixing columns 211 are disposed on the base 21 and located between the two sliders 232, the cam 2311 is located between the two first fixing columns 211, the two first fixing columns 211 are disposed at intervals along a second direction, the two second fixing columns 2323 are disposed on the sliders 232 and are arranged at intervals along the second direction, wherein the second direction is perpendicular to the first direction, two ends of the elastic members 233 are respectively connected with the first fixing columns 211 and the second fixing columns 2323 and extend along the first direction, a front projection of the cam 2311 on the base 21 is elliptical and the middle of the cam 2311 passes through the axis of the middle frame 10, that is, and the positioning slots 23111 for connecting with the engaging columns 231221 are disposed on the cam 2311.

It is easy to understand that in the present embodiment, the number of the sliding blocks 232 and the fixing slots 12 is two and can be symmetrical with respect to the preset plane passing through the axis of the installation space 11, so that the stability of the locking filter element when the sliding blocks 232 are clamped into the fixing slots 12 can be ensured.

It will be appreciated that the long axis of the cam 2311 is the long side of the cam 2311, the short axis of the cam 2311 is the short side of the cam 2311, when the long axis of the cam 2311 extends in the first direction and two ends of the side wall passing through the long axis respectively abut against the sliders 232 arranged at intervals in the first direction, the sliders 232 are pushed into the fixing grooves 12 by the cam 2311 to enable the filter element to be in a locked state, and at this time, the elastic member 233 is in a stretched state, the elastic member 233 has an inward contraction force, the contraction force can assist the user in rotating the knob 22, for example, when the user screws in any direction so that the long side of the cam 2311 gradually moves away from the sliders 232 to enable the short side to gradually rotate in a direction approaching the sliders 232, the elastic force with contraction can drive the sliders 232 to move in a direction approaching the cams 2311 to enable the sliders 232 to retract into the installation spaces 11.

Further, in the present embodiment, a roller groove 2321 is formed on one side of the slider 232 close to the cam 2311, the roller groove 2321 is provided with a roller 2322, the roller 2322 can rotate along the axis of the roller 2322 relative to the slider 232, the rotation axis of the roller 2322 is parallel to the rotation axis of the cam 2311, and the roller 2322 abuts against the outer wall of the cam 2311. It will be appreciated that, because the cam 2311 abuts against the outer wall of the roller 2322, the roller 2322 can reduce friction with the cam 2311 during rotation of the cam 2311, so as to ensure the service life of the cam 2311 and the slider 232.

In the present embodiment, the roller 2322 is mounted to the roller groove 2321 by a bolt.

Further, in the present embodiment, the locking member 23 further includes a pressing piece 24, where the pressing piece 24 is connected to the base 21, and the pressing piece 24 and the base 21 together define a sliding space extending along the first direction, the slider 232 is installed in the sliding space, when the long side abuts against the roller 2322 and extends along the first direction, the roller 2322 is located between the pressing piece 24 and the cam 2311, specifically in the present embodiment, when the long side abuts against the roller 2322 and extends along the first direction, the roller 2322 abuts against the pressing piece 24, in other words, the pressing piece 24 can limit the movement of the slider 232 only along the first direction, and can also limit the movement distance of the slider 232 along the direction away from the cam 2311, and when the knob 22 is rotated, the long side of the cam 2311 gradually abuts against the roller 2322 until the extending direction of the long side of the cam 2311 is parallel to the first direction, at this time, the distance between the slider 232 and the center of the cam 2311 is the maximum, that is the distance between the slider 232 and the center of the cam 2311 in the first direction, in other words, the slider 232 is blocked into the fixing groove 12, so that the filter element is locked.

Further, a plurality of ball grooves 25 are formed in one side of the slider 232, which is close to the pressing piece 24, and balls 26 are installed in the ball grooves 25, and the balls 26 are used for supporting the pressing piece 24, and it can be understood that when the slider 232 moves in the first direction, friction between the slider 232 and the pressing piece 24 can be reduced through the balls 26, so that the slider 232 can move in the first direction more smoothly.

In the present embodiment, the pressing piece 24 is connected to the base 21 by a bolt.

In the same manner as above, a plurality of ball grooves 25 are also provided on the side of the base 21 close to the slider 232, and balls 26 are mounted in the ball grooves 25, the balls 26 being for abutting against the slider 232. When the slider 232 slides in the first direction in the sliding space, friction generated between the slider and the pressing piece 24 and between the slider and the base 21 can be reduced by the balls 26 on the upper and lower sides of the slider, respectively, so that the slider can move more easily in the first direction relative to the base 21 and the pressing piece 24.

Of course, in other embodiments, other components capable of reducing friction between the slider 232 and the base 21 and the pressing piece 24 may be used, which is not particularly limited herein, so long as friction between the slider 232 and the base 21 and the pressing piece 24 can be reduced.

In summary, the filter element locking device 1 provided in the embodiment of the utility model includes a middle frame 10 and a locking assembly 20. The middle frame 10 is provided with a mounting space 11 for mounting the filter element and being coaxial with the middle frame, and the side wall of the middle frame 10 is also provided with a fixing groove 12 communicated with the mounting space 11. The locking assembly 20 comprises a base 21, a knob 22 and a locking piece 23, wherein the base 21 is used for being installed in the installation space 11, the locking piece 23 is connected with the base 21, the knob 22 is connected with the locking piece 23 and can drive the locking piece 23 to rotate, and when the knob 22 rotates, the locking piece 23 can be driven to be clamped into the fixed groove 12 or retract into the installation space 11 from the fixed groove 12. Under the action of the knob 22, it is possible to control whether the locking member 23 is in the fixing groove 12 to control the cartridge to be in a locked or unlocked state. The filter element is prevented from being screwed with the shell, and the user can conveniently detach the user from the middle frame 10 through screwing, matching between the locking piece 23 and the fixed groove 12, so that the experience of the user is improved.

Second embodiment:

it should be noted that, in the filter element locking device 1 provided in this embodiment, the structure of the filter element locking device 1 is substantially the same as that of the filter element locking device 1 provided in the first embodiment, and the difference is only that the cam 2311 is different in structure, so that the filter element locking device 1 in the first embodiment has the beneficial effects, and therefore the beneficial effects of the filter element locking device 1 in the first embodiment are not repeated herein.

Referring to fig. 6-9, the cam 2311 structure in the filter element locking device 1 provided in this embodiment includes a disc, which is provided with cam grooves 2313 symmetrically disposed about a center of the disc, the number of the two sliders 232 and the number of the fixing grooves 12 are two, the two sliders 232 and the two fixing grooves 12 are disposed opposite to each other along a first direction with respect to a preset plane passing through an axis of the middle frame 10, wherein the sliders 232 are provided with roller grooves 2321, the locking assembly further includes rollers 2322, the rollers 2322 sequentially penetrate through the cam grooves 2313 and the roller grooves 2321, the rollers 2322 can rotate about the axis of the sliders 232 and abut against the groove walls of the cam grooves 2313, and when the knob 22 drives the disc to rotate, the rollers 2322 slide in the cam grooves 2313 and can drive the sliders 232 to be clamped into the fixing grooves 12 or drive the sliders 232 to retract into the installation space 11.

It should be noted that, when the sliding blocks 232 are clamped into the fixed slots 12 and the filter element is in the locked state, the rollers 2322 on the two sliding blocks 232 are both at the first limit position on the cam slot 2313, in the first direction, the first limit position is spaced from the center of the disc maximally, when the sliding blocks 232 are retracted into the installation space 11, the filter element is in the unlocked state, the rollers 2322 are at the second limit position on the cam slot 2313, in the first direction, the second limit position is spaced from the center of the disc at the minimum distance, during the rotation of the knob 22, the rollers 2322 move between the first limit position and the second limit position in the cam slot 2313, and the rollers 2322 can drive the sliding blocks 232 to switch between the locked state and the unlocked state of the sliding blocks 232 through the cooperation of the cam slots 2313 and the rollers 2322, so that the resetting of the sliding blocks 232 is avoided by the elastic pieces 233, the first fixing columns 211 and the second fixing columns 2323 in the first embodiment.

In summary, the filter element locking device 1 provided in the embodiment of the utility model includes a middle frame 10 and a locking assembly 20. The middle frame 10 is provided with a mounting space 11 for mounting the filter element and being coaxial with the middle frame, and the side wall of the middle frame 10 is also provided with a fixing groove 12 communicated with the mounting space 11. The locking assembly 20 comprises a base 21, a knob 22 and a locking piece 23, wherein the base 21 is used for being installed in the installation space 11, the locking piece 23 is connected with the base 21, the knob 22 is connected with the locking piece 23 and can drive the locking piece 23 to rotate, and when the knob 22 rotates, the locking piece 23 can be driven to be clamped into the fixed groove 12 or retract into the installation space 11 from the fixed groove 12. Under the action of the knob 22, it is possible to control whether the locking member 23 is in the fixing groove 12 to control the cartridge to be in a locked or unlocked state. The filter element is prevented from being screwed with the shell, and the user can conveniently detach the user from the middle frame 10 through screwing, matching between the locking piece 23 and the fixed groove 12, so that the experience of the user is improved.

The embodiment of the utility model also provides a filter element structure, which comprises the filter element locking device 1 in the first embodiment and the second embodiment.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (9)

1. A cartridge lockout device comprising:

the middle frame is provided with an installation space for installing the filter element and coaxial with the middle frame, and the side wall of the middle frame is also provided with a fixing groove communicated with the installation space;

the locking assembly comprises a base, a knob and a locking piece, wherein the base is used for being installed in the installation space, the locking piece is connected with the base, the knob is connected with the locking piece and can drive the locking piece to rotate, and when the knob rotates, the locking piece can be driven to be clamped into the fixed groove or retract into the installation space from the fixed groove;

the locking piece comprises a cam mechanism and a sliding block, wherein the cam mechanism is connected with the knob and is arranged on the base, the cam mechanism is used for propping against the sliding block, the sliding block is arranged on the base and can move along a first direction relative to the base, when the knob drives the cam mechanism to rotate and the long side of the cam mechanism is propped against the sliding block, the sliding block is clamped into the fixing groove, and when the knob drives the cam mechanism to rotate and the short side of the cam mechanism is propped against the sliding block, the sliding block is retracted into the installation space.

2. A cartridge locking arrangement according to claim 1, wherein:

the cam mechanism comprises a cam and four elastic pieces, wherein the two sliding blocks are positioned on two sides of the cam, the two sliding blocks and the two fixing grooves are arranged in two, the two sliding blocks and the two fixing grooves are symmetrically arranged on a preset plane passing through the axis of the middle frame and are distributed along the first direction, two first fixing columns are arranged on the base and are positioned between the two sliding blocks, the cam is positioned between the two first fixing columns, the two first fixing columns are arranged at intervals along the second direction, the two second fixing columns distributed at intervals along the second direction are arranged on the sliding blocks, the second direction is perpendicular to the first direction, the two ends of the elastic pieces are respectively connected with the first fixing columns and the second fixing columns and extend along the first direction, and the orthographic projection of the cam on the base is elliptical and the center of the cam passes through the axis of the middle frame.

3. A cartridge locking arrangement according to claim 2, wherein:

the sliding block is provided with a roller groove on one side close to the cam, the roller groove is provided with a roller, the roller can rotate along the axis of the sliding block, the rotation axis of the roller is parallel to the rotation axis of the cam, and the roller abuts against the outer wall of the cam.

4. A cartridge locking arrangement according to claim 3, wherein:

the locking piece further comprises a pressing piece, the pressing piece is connected with the base, the pressing piece and the base jointly define a sliding space extending along a first direction, the sliding block is installed in the sliding space, and when the long edge is abutted with the roller and the long edge extends along the first direction, the roller is located between the pressing piece and the cam.

5. A cartridge locking arrangement according to claim 4, wherein:

a plurality of ball grooves are formed in one side, close to the pressing piece, of the sliding block, and balls are arranged in the ball grooves.

6. A cartridge locking arrangement according to claim 1, wherein:

the base is close to one side of slider also is provided with a plurality of ball grooves, install the ball in the ball groove, the ball be used for with the slider supports and holds.

7. A cartridge locking arrangement according to claim 1, wherein:

the cam structure comprises a disc, two cam grooves which are symmetrically arranged relative to the center of the disc are formed in the disc, the number of the sliding blocks and the number of the fixing grooves are two, the sliding blocks and the fixing grooves are symmetrically arranged relative to a preset plane passing through the axis of the middle frame and are arranged along the first direction at intervals, the sliding blocks are provided with roller grooves, the locking assembly further comprises rollers, the rollers sequentially penetrate through the cam grooves and the roller grooves, the rollers can rotate relative to the sliding blocks along the axis of the sliding blocks and abut against the groove walls of the cam grooves, and when the knob drives the disc to rotate, the rollers slide in the cam grooves and can drive the sliding blocks to be clamped into the fixing grooves or drive the sliding blocks to retract into the installation space.

8. A cartridge locking arrangement according to claim 1, wherein:

the knob comprises a body and a meshing column connected with the body, a positioning groove for installing the meshing column is formed in the locking piece, and the centers of the positioning groove and the meshing column are all located on the axis of the installation space.

9. A filter cartridge arrangement comprising a filter cartridge locking arrangement according to any one of claims 1 to 8.

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