Filter Element Device and Water Purification Equipment

Abstract

The present invention discloses a filter element device and a water purification device. The filter element device includes an installation frame body having an accommodation cavity, and a filter element assembly is inserted inwardly into the accommodation cavity, including a filter bottle and a handle pivotally connected to an end of the filter bottle; the handle can pivot between a fastening position and a lifting position; a locking portion is provided on the outer peripheral surface of the filter bottle; a filter element locking mechanism is provided on the installation frame body; when the handle is in the fastening position, the filter element locking mechanism is locked with the locking portion, so that the filter bottle and the installation frame body are in a locked state; when the handle pivots to the lifting position, the locking between the filter element locking mechanism and the locking portion is released, so that the filter bottle and the installation frame body are in an unlocked state. For the above filter element device, the handle is a driving structure. When the handle rotates to the lifting position, the locking between the filter bottle and the installation frame body can be released, and the disassembly and replacement operation of the filter element assembly is convenient; the filter element locking structure is arranged around the filter bottle, without damaging the space at the bottom of the filter bottle, ensuring the integrity and reliability of the filter element structure.

Description

Technical Field

[0001] The present invention relates to the technical field of water purification, and particularly to a filter element device and a water purification device. Background Art

[0002] Filter element replacement is an inevitable process for water purifiers. With the upgrading of filter element structures, it has become a trend for users to replace filter elements by themselves. The current filter element replacement mechanism of household water purifiers has a complex structure, low mechanism reliability, and a cumbersome operation process, which reduces the user experience of filter element replacement. More importantly, the complex filter element replacement mechanism reduces the locking stability of the filter element and greatly increases the risk of locking failure during transportation and use of the filter element. In order to improve the user experience of filter element replacement and increase the locking reliability of the filter element during transportation and use, and simplify the structure to the greatest extent, a convenient filter element replacement structure design is imminent. Summary of the Invention

[0003] Based on this, the technical problem to be solved by the present invention is to provide a water purification device with a filter element device that has a simple structure and is convenient for filter element replacement operation.

[0004] To achieve the above invention purpose, the present invention adopts the following technical solutions:

[0005] A filter element device, comprising:

[0006] An installation frame body, which has a receiving cavity;

[0007] A filter element assembly, inserted inward into the receiving cavity, including a filter bottle and a handle pivotally connected to an end of the filter bottle; the handle can pivot between a fastening position and a lifting position; a locking portion is provided on an outer peripheral surface of the filter bottle;

[0008] A filter element locking mechanism, provided on the installation frame body and connected to the handle; when the handle is in the fastening position, the filter element locking mechanism is locked with the locking portion, so that the filter bottle and the installation frame body are in a locked state; when the handle pivots to the lifting position, the locking between the filter element locking mechanism and the locking portion is released, so that the filter bottle and the installation frame body are in an unlocked state.

[0009] Further, the filter element locking mechanism includes:

[0010] A pressing rod, slidably arranged on the installation frame body along the axial direction of the filter bottle, the pressing rod having a first end close to the handle and a second end far from the handle;

[0011] A first elastic member, connected to the pressing rod for resetting the pressing rod after it is pressed down;

[0012] A sliding tongue is slidably arranged on the outer peripheral surface of the filter bottle with the axis of the filter bottle as the rotation axis; a first inclined surface structure is arranged between the second end of the pressure rod and the sliding tongue;

[0013] A second elastic member, connected to the sliding tongue, and used for resetting the sliding tongue after circumferential rotation;

[0014] When the handle is in the buckled position, the locking portion and the sliding tongue are locked, limiting the outward axial movement of the filter bottle, so that the filter bottle and the mounting frame are in a locked state; when the handle is pivoted to the lifted position, the handle pushes the pressure rod to move axially, and drives the sliding tongue to rotate circumferentially along the outer circumferential surface of the filter bottle through the first inclined surface structure, so that the locking portion and the sliding tongue are released, releasing the outward axial movement of the filter bottle, and the filter bottle and the mounting frame are in an unlocked state.

[0015] Furthermore, the locking portion is a locking boss arranged on the outer side wall of the filter bottle; the sliding tongue is arranged on the side of the locking boss close to the handle, and an unlocking groove is provided on the side of the sliding tongue close to the filter bottle; when the handle is in the buckled position, the locking boss abuts against the sliding tongue and is staggered with the unlocking groove, thereby limiting the outward axial movement of the filter bottle; when the handle is pivoted to the lifting position, the pressure rod drives the sliding tongue to rotate circumferentially, so that the unlocking groove is opposite to the locking boss, thereby releasing the outward axial movement of the filter bottle.

[0016] Furthermore, the first inclined surface structure includes a first inclined rib arranged on the sliding tongue and a second inclined rib arranged on the second end of the pressure rod; a side of the second end of the pressure rod close to the sliding tongue is cut out to form a step portion, and the second inclined rib is arranged on the step portion.

[0017] Furthermore, there are two unlocking grooves, which are respectively arranged on both sides of the sliding tongue, and there are two locking bosses correspondingly; a concave groove is provided in the middle of the sliding tongue, and the first inclined rib is arranged in the concave groove.

[0018] Furthermore, a second inclined surface structure is provided between the locking boss and the inner wall of the unlocking groove. When the filter bottle is inserted into the accommodating cavity, the locking boss causes the sliding tongue to rotate circumferentially through the second inclined surface structure, so that the locking boss slides into the unlocking groove; when the locking boss passes through the unlocking groove, the sliding tongue is reset and abuts against the locking boss, so that the filter bottle is locked in place.

[0019] Further,

[0020] The two ends of the handle pivotally connected to the filter bottle have extensions, and when the handle is lifted, the extensions press the pressure rod to move axially inward;

[0021] The filter element locking mechanism further includes a moving cushion block and a third elastic member;

[0022] The moving cushion block and the third elastic member are arranged on the first end face of the pressure rod, and a third inclined surface structure is arranged at the end of the protruding portion;

[0023] When the handle pivots from the buckling position to the lifting position, the protruding portion pushes the pressure rod to axially move by pressing down the moving cushion block; when the handle is in the lifting position, the filter bottle is inserted into the accommodating cavity inward, and the third inclined surface structure of the protruding portion abuts against one side of the moving cushion block close to the filter bottle, and the moving cushion block is pushed to move away from the filter bottle along the radial direction of the filter bottle through the third inclined surface structure; when the filter bottle continues to be inserted inward, the protruding portion abuts against the first end face of the pressure rod and pushes the pressure rod to axially move; the first inclined rib and the second inclined rib are arranged at intervals, and the interval distance is greater than or equal to the moving distance of the pressure rod; the third elastic member is used for the reset of the moving cushion block.

[0024] Further, the first end of the pressure rod has a platform portion, a fixing block is arranged on the platform portion, the moving cushion block is slidably arranged on the platform portion, and the third elastic member is connected between the fixing block and the moving cushion block.

[0025] Further, an installation opening is formed on the installation frame body, and the sliding tongue is arranged in the installation opening; an axial sliding groove communicated with the installation opening is arranged on the installation frame body, and the pressure rod is arranged in the axial sliding groove; a cover is arranged on the installation opening.

[0026] The present invention further includes a water purification device, including the above-mentioned filter element device.

[0027] Compared with the prior art, the advantages and positive effects of the present invention are:

[0028] For the above-mentioned filter element device, the handle is used as a driving structure. When the handle rotates to the lifting position, the locking between the filter bottle and the installation frame body can be released, improving the utilization rate of the filter element handle, and the disassembly and replacement operation of the filter element assembly is convenient; at the same time, the filter element locking structure is arranged on the installation frame body around the filter bottle, without damaging the space at the bottom of the filter bottle, thus ensuring the integrity of the filter element structure to the greatest extent and increasing the reliability of the filter element structure.

[0029] After reading the specific embodiments of the present invention in conjunction with the drawings, other features and advantages of the present invention will become clearer. Description of the Drawings

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required in the embodiments. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0031] Figure 1 It is a schematic structural diagram of the filter element device of the present invention;

[0032] Figure 2 It is a schematic structural diagram of the filter element assembly and the filter element locking mechanism in the filter element device of the present invention Figure 1 ;

[0033] Figure 3 It is a schematic structural diagram of the filter element assembly and the filter element locking mechanism in the filter element device of the present invention Figure 2 ;

[0034] Figure 4 It is a schematic structural diagram of the sliding tongue in the filter element device of the present invention;

[0035] Figure 5 It is a schematic structural diagram of the pressure rod, the moving cushion block and the fixed block in the filter element device of the present invention;

[0036] Figure 6 It is a schematic diagram when the filter bottle and the installation frame body are in a locked state when the handle in the filter element device of the present invention is in the buckled position;

[0037] Figure 7 It is a schematic diagram when the filter bottle and the installation frame body are in an unlocked state when the handle in the filter element device of the present invention is in the lifted position;

[0038] Figure 8 It is a schematic diagram of the movement process of the installation of the filter element assembly in the filter element device of the present invention;

[0039] Explanation of the reference numerals:

[0040] Installation frame body 100; main frame body 110; cover 111; end cover 120;

[0041] Filter element assembly 200; filter bottle 210; locking boss 211; handle 220; protruding part 221;

[0042] Filter element locking mechanism 300;

[0043] Pressure rod 310; step part 311; second inclined convex rib 312; platform part 313;

[0044] Sliding tongue 320; sunken groove 321; first inclined convex rib 322; unlocking groove 323;

[0045] First elastic member 330;

[0046] The second elastic member 340;

[0047] The movable cushion block 350;

[0048] The third elastic member 360;

[0049] The fixed block 370. Specific embodiments

[0050] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0051] It should be noted that, in the description of the present invention, the terms indicating the direction or positional relationship such as "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the direction or positional relationship shown in the accompanying drawings. This is only for convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0052] Refer to Figures 1-8 , which is an embodiment of the filter element device of the present invention. The filter element device includes a mounting frame 100, a filter element assembly 200, and a filter element locking mechanism 300. The mounting frame 100 has a receiving cavity, and the filter element assembly 200 is inserted into the receiving cavity inwardly. The filter element assembly 200 includes a filter bottle 210 and a handle 220 pivotally connected to an end of the filter bottle 210. As Figure 6 and Figure 7 , the handle 220 can pivot between a fastening position and a lifting position and is connected to the filter bottle 210 by a pin. In this embodiment, the lifting position of the handle 220 is perpendicular to the end face of the filter bottle 210. Among them, a locking portion 211 is provided on the outer peripheral surface of the filter bottle 210, and the locking portion is mainly used to fix the filter bottle 210 to prevent the filter bottle 210 from detaching under the action of water pressure.

[0053] The filter element locking mechanism 300 is disposed on the mounting frame 100 and is used to connect with the handle 220. As Figure 6 shown, when the handle 220 is in the fastening position, the filter element locking mechanism 300 is locked with the locking portion, so that the filter bottle 210 and the mounting frame 100 are in a locked state; as Figure 7 shown, when the handle 220 pivots to the lifting position, the locking between the filter element locking mechanism 300 and the locking portion is released, so that the filter bottle 210 and the mounting frame 100 are in an unlocked state.

[0054] For the above filter element device, the handle 220 is used as the driving structure. When the handle 220 is rotated to the lifting position, the locking between the filter bottle 210 and the mounting frame 100 can be released, improving the utilization rate of the filter element handle 220 and making the disassembly and replacement operation of the filter element assembly 200 convenient; at the same time, the filter element locking structure is arranged on the mounting frame 100 around the filter bottle 210 without damaging the bottom space of the filter bottle 210, thus ensuring the integrity of the filter element structure to the greatest extent and increasing the reliability of the filter element structure.

[0055] Specifically, as Figure 2 and Figure 3 shown, the filter element locking mechanism 300 includes a pressure rod 310, a sliding tongue 320, a first elastic member 330 and a second elastic member 340. The pressure rod 310 is slidably arranged on the mounting frame 100 along the axial direction of the filter bottle 210. The pressure rod 310 has a first end close to the handle 220 and a second end far from the handle 220. The sliding tongue 320 is slidably arranged on the outer peripheral surface of the filter bottle 210 with the axis of the filter bottle 210 as the rotation axis. A first inclined surface structure is arranged between the second end of the pressure rod 310 and the sliding tongue 320. The first elastic member 330 is connected to the pressure rod 310 for resetting the pressure rod 310 after it is pressed down. The second elastic member 340 is connected to the sliding tongue 320 for resetting the sliding tongue 320 after its circumferential rotation. When the handle 220 is in the buckling position, the locking part is locked with the sliding tongue 320, restricting the outward axial movement of the filter bottle 210 and making the filter bottle 210 and the mounting frame 100 in a locked state; when the handle 220 is pivoted to the lifting position, the handle 220 pushes the pressure rod 310 to move axially, driving the sliding tongue 320 to rotate circumferentially along the outer peripheral surface of the filter bottle 210 through the first inclined surface structure, unlocking the locking part and the sliding tongue 320, releasing the outward axial movement of the filter bottle 210 and making the filter bottle 210 and the mounting frame 100 in an unlocked state. In the filter element locking mechanism 300, the driving structure between the pressure rod 310 and the sliding tongue 320 adopts an inclined surface structure, which can ensure the stability, reliability and continuity of the driving process, and reduce the size of the filter element locking mechanism 300, so that the filter element locking mechanism 300 is simple and effective and achieves the purpose of convenience.

[0056] Specifically, the locking part is a locking boss 211 arranged on the outer side wall of the filter bottle 210. The sliding tongue 320 is arranged on the side of the locking boss 211 close to the handle 220, and an unlocking groove 323 is formed on the surface of the sliding tongue 320 close to the filter bottle 210. As Figure 3 and Figure 6 shown, when the handle 220 is in the buckling position, the locking boss 211 abuts against the sliding tongue 320 and is arranged out of alignment with the unlocking groove 323, restricting the outward axial movement of the filter bottle 210; as Figure 7As shown, when the handle 220 is pivoted to the lifting position, the pressing rod 310 drives the sliding tongue 320 to rotate circumferentially, so that the unlocking groove 323 faces the locking boss 211, and the outward axial movement of the filter bottle 210 is released.

[0057] Specifically, referring to Figure 2 and Figure 5 , the first inclined surface structure includes a first inclined rib 322 provided on the sliding tongue 320 and a second inclined rib 312 provided on the second end of the pressing rod 310; the first inclined rib 322 and the second inclined rib 312 cooperate with each other. A step portion 311 is formed by cutting off one side of the second end of the pressing rod 310 close to the sliding tongue 320, and the second inclined rib 312 is provided on the step portion 311. In this embodiment, there are two unlocking grooves 323, which are respectively provided on both sides of the sliding tongue 320, and two corresponding locking bosses 211 are provided to enhance the firmness of the locking between the sliding tongue 320 and the locking boss 211. The middle of the sliding tongue 320 has a concave groove 321, and the first inclined rib 322 is provided in the concave groove 321. The setting of the concave groove 321 can make the pressing rod 310 close to the filter bottle 210, reducing the overall volume of the filter element device.

[0058] To facilitate the installation of the filter element assembly 200, a second inclined surface structure is provided between the locking boss 211 and the inner wall of the unlocking groove 323. When the filter bottle 210 is inserted inward into the accommodating cavity, the locking boss 211 rotates the sliding tongue 320 circumferentially through the second inclined surface structure, so that the locking boss 211 slides into the unlocking groove 323; when the locking boss 211 passes through the unlocking groove 323, the sliding tongue 320 resets and abuts against the locking boss 211, locking the filter bottle 210 in place. In this embodiment, as Figure 6 shown, the second inclined surface structure includes an inclined surface a provided on the side surface of the locking boss 211.

[0059] As Figure 2 and 7 shown, in this embodiment, the two ends of the handle 220 pivotally connected to the filter bottle 210 have protruding portions 221. When the handle 220 is lifted, the protruding portions 221 press the pressing rod 310 to move axially inward. Referring to Figure 5 and Figure 8 shown, the filter element locking mechanism 300 further includes a moving cushion block 350 and a third elastic member 360. The moving cushion block 350 and the third elastic member 360 are arranged on the end surface of the first end of the pressing rod 310, and a third inclined surface structure is provided at the end of the protruding portion 221. In this embodiment, the first elastic member 330, the second elastic member 340 and the third elastic member 360 are preferably springs, and the third inclined surface structure is an arc-shaped inclined surface b provided on the side surface of the end of the protruding portion 221.

[0060] During the disassembly process, referring to Figure 6 and Figure 7When the handle 220 pivots from the buckled position to the lifted position, the protruding portion 221 directly presses down to move the moving pad 350, thereby pushing the pressure rod 310 to axially move.

[0061] During the installation process, with reference to Figure 8 When the handle 220 is in the lifted position, the filter bottle 210 is inserted into the accommodating cavity inward. The third inclined surface structure of the protruding portion 221 abuts against one side of the moving pad 350 close to the filter bottle 210. By means of the third inclined surface structure, the moving pad 350 is pushed to move in the radial direction of the filter bottle 210 away from the filter bottle 210 until the protruding portion 221 of the handle 220 contacts the end face of the first end of the pressure rod 310. At this time, the sliding tongue 320 has rotated a certain angle around the axis under the action of the locking boss 211. Then the filter bottle 210 continues to be inserted inward. The protruding portion 221 abuts against the end face of the first end of the pressure rod 310 and pushes the pressure rod 310 to axially move. In this embodiment, the first inclined rib 322 and the second inclined rib 312 are arranged at intervals, and the interval distance is greater than or equal to the moving distance of the pressure rod 310. Therefore, after the pressure rod 310 axially moves, the first inclined rib 322 and the second inclined rib 312 do not contact each other. When the locking boss 211 extends out of the unlocking groove 323 of the sliding tongue 320, the sliding tongue 320 resets under the action of the spring and locks with the locking boss 211, and the filter element is installed in place. At this time, the first inclined rib 322 of the sliding tongue 320 contacts the second inclined rib 312 of the pressure rod 310. When the handle 220 is rotated, the moving pad 350 and the pressure rod 310 reset under the action of the spring until the handle 220 rotates and resets to the buckled position. In this embodiment, the function of the moving pad 350 is to prevent the problem that the filter bottle 210 is not locked in place during installation, so that the locking boss 211 and the handle 220 do not act simultaneously. A travel difference is formed through the moving pad 350 to ensure that the sliding tongue 320 and the locking boss 211 have been locked and the pressure rod 310 has not yet acted on the sliding tongue 320.

[0062] In this embodiment, as Figure 5 shown, the first end of the pressure rod 310 has a platform portion 313. A fixing block 370 is arranged on the platform portion 313. The moving pad 350 is slidably arranged on the platform portion 313. The third elastic member 360 is connected between the fixing block 370 and the moving pad 350.

[0063] With reference to Figure 1 the installation frame 100 includes a main frame 110 and an end cover 120 arranged on the main frame 110. An opening is formed on the end cover 120 for inserting the filter bottle 210. The end cover 120 presses the pressure rod 310 on the main frame 110. In this embodiment, the fixing block 370 abuts against the inner side surface of the end cover 120. The end cover 120 is fixed to the main frame 110 by fasteners such as screws.

[0064] The mounting frame 100 is provided with a mounting opening, and the sliding tongue 320 is arranged in the mounting opening; the mounting frame 100 is provided with an axial sliding groove communicated with the mounting opening, and the pressing rod 310 is arranged in the axial sliding groove. A cover 111 is provided on the mounting opening to enclose the sliding tongue 320 within the mounting frame 100. In this embodiment, two filter element locking mechanisms 300 are symmetrically arranged and adopt a modular design. The failure of a single module will not affect the effectiveness of the overall mechanism. While increasing the structural stability and reliability, the convenience of installation and disassembly of the mechanism is minimized to the greatest extent.

[0065] Figure 7 It is a schematic diagram of the movement during the removal process of the filter element assembly. Rotate the handle 220 to drive the pressing rod 310 to move inward. Through the action of the first inclined surface structure, drive the sliding tongue 320 to rotate circumferentially around the central axis of the filter bottle 210 until the unlocking groove 323 on the sliding tongue 320 faces the locking boss 211 on the filter bottle 210, so that the locking boss 211 disengages from the sliding tongue 320, and then the filter element assembly 200 can be removed.

[0066] Figure 8 The figure shows a schematic diagram of the movement during the installation process of the filter element assembly. When the handle 220 is in the lifted position, insert the filter bottle 210 inward into the accommodating cavity. The handle 220 first pushes the moving cushion block 350 to move outward until the handle 220 contacts the pressing rod 310. At this time, the sliding tongue 320 has rotated a certain angle around the axis under the action of the locking boss 211; then the filter bottle 210 continues to be inserted inward, pushing the pressing rod 310 to move axially, and the locking boss 211 is inserted into the unlocking groove 323 of the sliding tongue 320. When the locking boss 211 extends out of the unlocking groove 323 of the sliding tongue 320, the sliding tongue 320 resets under the action of the spring and locks with the locking boss 211, and the filter element is installed in place. At this time, the first inclined rib 322 of the sliding tongue 320 contacts the second inclined rib 312 of the pressing rod 310. Rotate the handle 220 to reset to the buckling position, and the moving cushion block 350 and the pressing rod 310 reset under the action of the spring.

[0067] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, for those of ordinary skill in the art, it is still possible to modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions required to be protected by the present invention.

Claims

1. A filter element device, characterized in that, Comprising: An installation frame body having a receiving cavity; A filter element assembly inserted inwardly into the receiving cavity, including a filter bottle and a handle pivotally connected to an end of the filter bottle; the handle can pivot between a fastening position and a lifting position; a locking boss is provided on an outer peripheral surface of the filter bottle; A filter element locking mechanism provided on the installation frame body and connected to the handle; when the handle is in the fastening position, the filter element locking mechanism is locked with the locking boss, so that the filter bottle and the installation frame body are in a locked state; when the handle pivots to the lifting position, the locking between the filter element locking mechanism and the locking boss is released, so that the filter bottle and the installation frame body are in an unlocked state; The filter element locking mechanism includes: A pressure rod slidably arranged on the installation frame body along the axial direction of the filter bottle, the pressure rod having a first end close to the handle and a second end far from the handle; A sliding tongue slidably arranged on an outer peripheral surface thereof with the axis of the filter bottle as the rotation axis; a first inclined surface structure is provided between the second end of the pressure rod and the sliding tongue; A second elastic member connected to the sliding tongue for resetting the sliding tongue after circumferential rotation; When locking, the sliding tongue is arranged on a side of the locking boss close to the handle; an unlocking groove is formed on a surface of the sliding tongue close to the filter bottle; a second inclined surface structure is provided between the locking boss and an inner wall of the unlocking groove; Both ends of the handle pivotally connected to the filter bottle have protruding portions; The filter element locking mechanism further includes a moving cushion block and a third elastic member; The moving cushion block and the third elastic member are arranged on an end surface of the first end of the pressure rod, and a third inclined surface structure is provided at an end of the protruding portion; When the handle pivots from the fastening position to the lifting position, the protruding portion axially moves the pressure rod by pressing down the moving cushion block; when the handle is in the lifting position, the filter bottle is inserted inwardly into the receiving cavity, and the third inclined surface structure of the protruding portion abuts against a side of the moving cushion block close to the filter bottle, and the moving cushion block is pushed to move away from the filter bottle in the radial direction of the filter bottle through the third inclined surface structure; when the filter bottle is further inserted inwardly, the protruding portion abuts against an end surface of the first end of the pressure rod, and the pressure rod is pushed to axially move; a travel difference is formed through the moving cushion block to ensure that the sliding tongue and the locking boss are already locked and the pressure rod has not yet acted on the sliding tongue.

2. The filter element device according to claim 1, characterized in that, The filter element locking mechanism includes: A first elastic member connected to the pressure rod for resetting the pressure rod after being pressed down; When the handle is in the fastening position, the locking boss is locked with the sliding tongue, restricting the filter bottle from moving axially outward, so that the filter bottle and the installation frame body are in a locked state; when the handle pivots to the lifting position, the handle pushes the pressure rod to axially move, and drives the sliding tongue to circumferentially rotate along the outer peripheral surface of the filter bottle through the first inclined surface structure, and the locking between the locking boss and the sliding tongue is released, releasing the axially outward movement of the filter bottle, so that the filter bottle and the installation frame body are in an unlocked state.

3. The filter element device according to claim 2, characterized in that, When the handle is in the buckling position, the locking boss abuts against the sliding tongue and is arranged out of alignment with the unlocking groove, restricting the outward axial movement of the filter bottle; when the handle pivots to the lifting position, the pressing rod drives the sliding tongue to rotate circumferentially, bringing the unlocking groove into alignment with the locking boss and releasing the outward axial movement of the filter bottle.

4. The filter element device according to claim 3, characterized in that, The first inclined surface structure includes a first inclined rib provided on the sliding tongue and a second inclined rib provided on the second end of the pressing rod; a step portion is formed by cutting off one side of the second end of the pressing rod close to the sliding tongue, and the second inclined rib is provided on the step portion.

5. The filter element device according to claim 4, wherein, There are two unlocking grooves, which are respectively arranged on both sides of the sliding tongue, and correspondingly there are two locking bosses; a concave groove is formed in the middle of the sliding tongue, and the first inclined rib is arranged in the concave groove.

6. The filter element device according to claim 4, characterized in that When the filter bottle is inserted into the accommodating cavity inwardly, the locking boss causes the sliding tongue to rotate circumferentially through the second inclined surface structure, enabling the locking boss to slide into the unlocking groove; when the locking boss passes through the unlocking groove, the sliding tongue resets and abuts against the locking boss, locking the filter bottle in place.

7. The filter element device according to claim 6, wherein The first inclined rib and the second inclined rib are arranged at intervals, and the interval distance during installation is greater than or equal to the moving distance of the pressing rod; the third elastic member is used for the reset of the moving cushion block.

8. The filter element device according to claim 7, wherein, A platform portion is provided at the first end of the pressing rod, a fixing block is arranged on the platform portion, the moving cushion block is slidably arranged on the platform portion, and the third elastic member is connected between the fixing block and the moving cushion block.

9. The filter element device according to claim 2, wherein, An installation opening is formed in the installation frame body, and the sliding tongue is arranged in the installation opening; an axial sliding groove communicating with the installation opening is provided on the installation frame body, and the pressing rod is arranged in the axial sliding groove; a cover is provided on the installation opening.

10. A water purification device, characterized in that, Comprising the filter element device according to any one of claims 1-9.

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