Filter element locking device, filter element assembly and water purifier

Abstract

The utility model discloses a filter element locking device, a filter element assembly and a water purifier, the filter element locking device comprises a filter element head, a mounting seat, a limiting piece, a limiting sleeve and an elastic piece, and the filter element head is provided with a limiting groove; the filter element head is sleeved with the mounting base, the mounting base can move in the axial direction of the filter element head, and the mounting base is provided with a mounting through hole corresponding to the limiting groove; the limiting piece is movably arranged in the mounting through hole in a penetrating manner, and part of the limiting piece extends into the limiting groove after the filter element head and the mounting seat are assembled in place; the limiting sleeve is arranged outside the mounting base in a sleeving mode and can move in the axial direction of the filter element head, and after the filter element head and the mounting base are assembled in place, the limiting sleeve prevents the limiting piece from retreating from the limiting groove; one end of the elastic piece is connected with the mounting base, the other end of the elastic piece is connected with the limiting sleeve, and the elastic piece is used for pressing the limiting sleeve to the filter element head.

Description

Technical Field

[0001] This utility model relates to the field of water purification equipment technology, and in particular to a filter cartridge locking device, a filter cartridge assembly, and a water purifier. Background Technology

[0002] With the development of water purification equipment technology, water purifiers are becoming increasingly popular. After a period of use, the filtration capacity of the filter cartridges in a water purifier will decrease, and they need to be replaced to maintain good filtration performance. During filter replacement, the filter cartridge bottle needs to be removed from the water purifier's housing, which requires disassembling the filter cartridge head from the mounting bracket inside the housing.

[0003] In existing technologies, there are various ways to connect the filter cartridge head to the mounting base. One common method is a snap-fit ​​structure, which is convenient, but improper operation can easily damage the elastic claws of the connector or the inlet and outlet of the filter cartridge, thus affecting the sealing performance and causing leakage. Another method is a threaded connection, which is secure, but requires rotating the filter cartridge bottle when replacing the cartridge, which undoubtedly increases the difficulty and inconvenience of operation when space is limited. Utility Model Content

[0004] This application provides a filter cartridge locking device, a filter cartridge assembly, and a water purifier, which can improve the sealing between the filter cartridge head and the mounting base, and enable convenient installation and disassembly.

[0005] In a first aspect, embodiments of this application provide a filter element locking device, including a filter element head, a mounting base, a limiting member, a limiting sleeve, and an elastic member. The filter element head has a limiting groove; the mounting base is sleeved outside the filter element head and is movable along the axial direction of the filter element head, and the mounting base has a mounting through hole corresponding to the limiting groove; the limiting member is movably inserted through the mounting through hole, and after the filter element head and the mounting base are assembled in place, the limiting member partially extends into the limiting groove; the limiting sleeve is sleeved outside the mounting base and is movable along the axial direction of the filter element head, and after the filter element head and the mounting base are assembled in place, the limiting sleeve prevents the limiting member from exiting the limiting groove; the elastic member has one end connected to the mounting base and the other end connected to the limiting sleeve, and is used to press the limiting sleeve against the filter element head.

[0006] In some embodiments, the elastic element is a spring, and the mounting base includes:

[0007] The base body is fitted over the filter head and has a mounting through hole;

[0008] The first limiting part is spaced apart from the mounting through hole and is exposed outside the first limiting sleeve;

[0009] The opposite ends of the spring abut against the first limiting part and the limiting sleeve, respectively.

[0010] In some embodiments, one end of the filter head is used for mounting to a filter bottle, and the first limiting portion is disposed at the end of the mounting base away from the filter bottle.

[0011] In some embodiments, the limiting portion is an annular structure that surrounds the outer wall of the mounting base.

[0012] In some embodiments, the limiting member extends into or out of the limiting groove radially along the filter head.

[0013] In some embodiments, the limiting member includes a limiting pin, which is hemispherical on both opposite sides of the filter head.

[0014] In some embodiments, the mounting through hole includes a first hole segment and a second hole segment arranged sequentially from the outside to the inside and communicating with each other. The diameter of the first hole segment is larger than the diameter of the second hole segment to form a stepped structure between the first hole segment and the second hole segment. The limiting pin includes:

[0015] The second limiting part is movably inserted into the first hole; and

[0016] The third limiting part is connected to the first end of the second limiting part near the limiting groove. The outer diameter of the third limiting part is smaller than the outer diameter of the second limiting part, so that the third limiting part can pass through the second hole and extend into the limiting groove, and the first limiting part abuts against the step surface of the stepped structure.

[0017] In some embodiments, the limiting groove is an annular groove arranged circumferentially along the filter head.

[0018] In some embodiments, multiple limiting grooves are provided and are spaced apart in the circumferential direction of the filter head.

[0019] In some embodiments, the limiting sleeve includes:

[0020] The first sleeve is movably fitted onto the outside of the mounting base along the circumference of the filter head;

[0021] The second sub-sleeve, connected to the first sub-sleeve, has an inner diameter larger than that of the first sub-sleeve. After the filter head is assembled with the mounting base, the second sub-sleeve prevents the limiting member from exiting the limiting groove; and

[0022] The third sub-sleeve has an inner diameter larger than that of the second sub-sleeve, so that when the third sub-sleeve is aligned with the mounting through hole, the limiting member can be disengaged from the limiting groove.

[0023] In some embodiments, the filter head is provided with a first positioning structure, and when the third sub-sleeve abuts against the first positioning structure, the second sub-sleeve abuts against the limiting member along the axial direction of the filter head.

[0024] In some embodiments, the filter head is provided with a second positioning structure, and when the mounting base abuts against the second positioning structure, the limiting member is positioned in the limiting groove.

[0025] In some embodiments, it also includes:

[0026] An anti-detachment component protrudes from the outer periphery of the mounting base and is used to prevent the limiting sleeve from detaching from the mounting base after the mounting base is separated from the filter head.

[0027] In some embodiments, the anti-detachment component is a limiting ring, which is sleeved on the outer periphery of the mounting base.

[0028] Secondly, embodiments of this application provide a filter element assembly, including...

[0029] Such as the filter element locking device mentioned above;

[0030] Filter bottle, wherein the filter element head is installed at one end of the filter bottle; and

[0031] The filter element is installed inside the filter bottle.

[0032] Thirdly, embodiments of this application provide a water purifier, including:

[0033] The housing has a mounting opening; and

[0034] As described above, in the filter element assembly, the mounting base is disposed within the housing, the filter bottle is detachably mounted within the housing via the filter element head, and the filter bottle and the filter element head can enter and exit the housing through the mounting opening.

[0035] Based on the filter cartridge locking device, filter cartridge assembly, and water purifier according to embodiments of this application, the outer wall surface of the filter cartridge head has a limiting groove, and the mounting seat is sleeved on the outside of the filter cartridge head and can move axially along the filter cartridge head. The mounting seat has a mounting through hole corresponding to the limiting groove. A limiting member is movably inserted through the mounting through hole, and a limiting sleeve is sleeved on the outside of the mounting seat and can move axially along the filter cartridge head. After the filter cartridge head and the mounting seat are assembled in place, the limiting member will align with the mounting through hole and can partially extend into the limiting groove. The limiting sleeve can also move axially along the filter cartridge head. After the filter cartridge head and the mounting seat are assembled in place, the limiting sleeve is moved again. After the limiting sleeve and the mounting seat are assembled in place, a force can be applied to the outer wall surface of the limiting member to drive the limiting member into the limiting groove and prevent the limiting member from exiting the limiting groove.

[0036] In this application, the spring automatically presses the limiting sleeve against the filter element head. The limiting sleeve maintains tight contact with the filter element head without requiring additional manual pressure, thereby improving the stability of the limiting component within the limiting groove and the sealing between the mounting base and the filter element head. Furthermore, the automatic pressing action of the elastic element simplifies the user's installation and removal of the filter element. Additionally, when the elastic element wears or fails due to long-term use, the user can easily replace it with a new one, thus extending the service life of the filter element locking device. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0038] Figure 1 This is a schematic diagram of the structure of a filter element assembly provided in an embodiment of this application;

[0039] Figure 2 An exploded view of a filter element assembly provided in an embodiment of this application;

[0040] Figure 3 A cross-sectional schematic diagram of a filter element assembly provided in an embodiment of this application;

[0041] Figure 4 This is a schematic diagram of the structure of another filter head provided in an embodiment of this application;

[0042] Figure 5 This is a schematic diagram of the structure of a mounting base provided in an embodiment of this application;

[0043] Figure 6This is a schematic diagram of the structure of a limiting member provided in an embodiment of this application;

[0044] Figure 7 This is a cross-sectional schematic diagram of a limiting sleeve provided in an embodiment of this application.

[0045] Explanation of icon numbers:

[0046] 1. Filter element assembly; 10. Filter element locking device; 100. Filter element head; 100a. Limiting groove; 110. First positioning structure; 120. Second positioning structure; 140. Main body; 150. Assembly part; 170. Foolproof structure; 200. Mounting base; 200a. Mounting through hole; 200b. First hole section; 200c. Second hole section; 200d. Stepped structure; 200e. Stepped surface; 200f. Positioning ring groove; 210. Base body; 220. Mounting part; 250. First limiting part; 300. Limiting component; 310. Second limiting part; 320. Third limiting part; 400. Limiting sleeve; 410. First sub-sleeve; 420. Second sub-sleeve; 430. Third sub-sleeve; 510. Anti-detachment component; 520. Sealing ring; 700. Elastic component; 20. Filter bottle; 30. Filter element.

[0047] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0048] To make the objectives, technical solutions and advantages of this utility model clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0049] Where the following description relates to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this invention. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this invention as detailed in the appended claims.

[0050] In the description of this utility model, it should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances. Furthermore, in the description of this utility model, unless otherwise stated, "multiple" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0051] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0052] This application provides a water purifier. The water purifier includes a housing and a filter element assembly 1. The housing has an installation opening through which the filter element assembly 1 enters and exits the internal space of the housing.

[0053] Please see Figures 1 to 3 The filter element assembly 1 includes a filter bottle 20, a filter element 30, and a filter element locking device 10. The filter element 30 is installed inside the filter bottle 20. The filter element locking device 10 includes a filter element head 100 and a mounting base 200. The filter element head 100 is installed at one end of the filter bottle 20 and seals the bottle opening. The mounting base 200 is located inside the housing, and the filter element head 100 is detachably connected to the mounting base 200. The filter bottle 20 is detachably installed inside the housing via the filter element head 100. The end of the filter bottle 20 facing away from the filter element head 100 is connected to the inlet water passage, and the filter element head 100 is connected to the outlet water passage via the mounting base 200. The water passes through the filter element 30 to achieve filtration. After the water purifier has been used for a period of time, the filter element head 100 can be disassembled from the mounting base 200, and the entire filter bottle 20 and the internal filter element 30 can be replaced. Understandably, the directions of the inlet and outlet water paths can be interchanged. That is, the filter head 100 can be connected to the inlet water path through the mounting base 200, and the end of the filter bottle 20 away from the filter head 100 can be connected to the outlet water path.

[0054] Optionally, the end of the filter bottle 20 facing away from the filter head 100 can be equipped with a screw-on, removable cap. Unscrewing the cap opens the bottle opening of the filter bottle 20, allowing replacement of the filter element 30. Screwing the cap back onto the filter bottle 20 seals the opening. The water inlet is connected to the cap. Since the filter head 100 and mounting base 200 are detachable, the filter bottle 20 can be removed from the housing, and removing the cap prevents leakage. Alternatively, the filter head 100 and filter bottle 20 can be made detachable, allowing replacement of the filter element 30 by removing the filter head 100 from the filter bottle 20.

[0055] In existing technologies, there are various ways to connect the filter head 100 and the mounting base 200. One common method is to use a snap-fit ​​structure, which is convenient, but improper operation can easily damage the elastic claws of the connector or the inlet and outlet of the filter element 30, thus affecting the sealing performance and causing leakage. Another method is to use a threaded connection, which is secure, but when replacing the filter element 30, the filter element 30 needs to be rotated, which undoubtedly increases the difficulty and inconvenience of operation in situations where space is limited. Based on this, the filter element locking device 10 of this application also includes a limiting member 300, a limiting sleeve 400, and an elastic member 700. The filter head 100, mounting base 200, limiting member 300, limiting sleeve 400, and elastic member 700 cooperate with each other to enable quick installation or removal of the filter bottle 20.

[0056] Please refer to the following: Figures 2 to 4 The outer wall of the filter element head 100 has a limiting groove 100a. A mounting base 200 is sleeved on the filter element head 100 and can move axially along the filter element head 100. The mounting base 200 has a mounting through hole 200a corresponding to the limiting groove 100a. A limiting member 300 is movably inserted through the mounting through hole 200a. A limiting sleeve 400 is sleeved on the mounting base 200 and can move axially along the filter element head 100. After the filter element head 100 and the mounting base 200 are assembled, the limiting member 300 will align with the mounting through hole 200a and can partially extend into the limiting groove 100a. The limiting sleeve 400 can also move along the axial direction of the filter head 100. After the filter head 100 and the mounting base 200 are assembled in place, the limiting sleeve 400 can be moved. After the limiting sleeve 400 and the mounting base 200 are assembled in place, force can be applied to the outer wall surface of the limiting member 300 to drive the limiting member 300 into the limiting groove 100a and prevent the limiting member 300 from exiting from the limiting groove 100a.

[0057] The elastic element 700 can be in the form of a spring, with one end connected to the mounting base 200 and the other end connected to the limiting sleeve 400, used to press the limiting sleeve 400 against the filter element head 100. Of course, in other embodiments, the elastic element 700 can also be in the form of a tension spring, and this application is not limited to this. In this application, the spring can automatically press the limiting sleeve 400 against the filter element head 100. The limiting sleeve 400 can maintain close contact with the filter element head 100 without requiring additional manual pressure, thereby improving the stability of the limiting element 300 fixed in the limiting groove 100a and the sealing between the mounting base 200 and the filter element head 100. Moreover, due to the automatic pressing action of the elastic element 700, the user's operation is simpler when installing or removing the filter element 30. Furthermore, when the elastic element 700 wears or fails due to long-term use, the user can easily replace it with a new elastic element 700, thereby extending the service life of the filter element locking device 10.

[0058] Please see Figure 1, Figure 3 and Figure 5 The mounting base 200 also includes a first limiting part 250, which is connected to the outer wall surface of the base body 210 and spaced apart from the mounting through hole 200a, and exposed outside the limiting sleeve 400; wherein, the first limiting part 250 is located at the end of the mounting base 200 away from the filter bottle 20. The opposite ends of the spring abut against the first limiting part 250 and the limiting sleeve 400, respectively. The first limiting part 250 provides a stable support point for the spring. This design ensures that the spring can function correctly and will not fail due to improper positioning or uneven force.

[0059] Optional, please refer to Figure 5 The first limiting portion 250 is an annular structure that surrounds the outer wall of the mounting base 200. This increases the contact area between the spring and the first limiting portion 250, thereby improving the spring's stability. Of course, in other embodiments, the first limiting portion 250 can be a plurality of spaced small protrusions, or one or two arc-shaped protrusions. This application does not limit the specific form of the first limiting portion 250.

[0060] Optionally, the limiting member 300 extends into or out of the limiting groove 100a radially along the filter head 100. In this way, the travel of the limiting member 300 is minimized, the resistance is reduced, and the positioning stability is improved. Of course, the limiting member 300 can also be set in an inclined or slightly inclined form, and the limiting member 300 can be inserted obliquely into the limiting groove 100a. This application does not impose any restrictions on this.

[0061] In some of these embodiments, please refer to Figure 4 The limiting groove 100a is an annular groove arranged circumferentially along the filter head 100. In this example, the limiting member 300 and the limiting groove 100a do not need to be positioned with particular precision. Positioning can be achieved simply by moving the mounting base 200 and the filter head 100 into place axially. Moreover, after the limiting member 300 extends into the limiting groove 100a, the position can still be finely adjusted by rotating the filter head 100 and the mounting base 200.

[0062] In some of these embodiments, please refer to Figure 2 Multiple limiting grooves 100a are provided and spaced apart circumferentially on the filter head 100. The number of limiting members 300 can be one or adapted to the number of limiting grooves 100a. In this example, each limiting groove 100a provides a fixing point, enhancing the connection stability between the filter head 100 and the mounting base 200.

[0063] For further details, please refer to Figure 6The limiting component 300 includes a limiting pin, which is hemispherical on both opposite sides of the filter head 100. The hemispherical design allows the limiting pin to smoothly enter the limiting groove 100a of the filter head 100, reducing friction and resistance during assembly. Furthermore, during assembly, the user does not need to manually operate the limiting pin; simply moving the mounting base 200 relative to the filter head 100 causes the limiting pin to automatically slide into the limiting groove 100a under the pressure of the inner wall of the limiting sleeve 400, simplifying the assembly process. Unlocking is also quick and convenient; simply moving the mounting base 200 relative to the filter head 100 causes the limiting pin to automatically slide out of the limiting groove 100a under the pressure of the outer wall of the filter head 100.

[0064] In some of these embodiments, please refer to Figure 5 The mounting through hole 200a includes a first hole segment 200b and a second hole segment 200c, which are sequentially arranged from the outside in and interconnected. The diameter of the first hole segment 200b is larger than that of the second hole segment 200c, forming a stepped structure 200d between the first hole segment 200b and the second hole segment 200c. The limiting pin includes a second limiting part 310 and a third limiting part 320. The second limiting part 310 is movably inserted into the first hole segment 200b. The third limiting part 320 is connected to the first end of the second limiting part 310 near the limiting groove 100a. The outer diameter of the third limiting part 320 is smaller than that of the second limiting part 310, so that the third limiting part 320 can pass through the second hole segment 200c and extend into the limiting groove 100a, and that the second limiting part 310 abuts against the stepped surface 200e of the stepped structure 200d. In this way, the limiting pin can be prevented from disengaging from the inside of the mounting through hole 200a. The stepped structure 200d ensures the depth to which the limiting pin extends into the limiting groove 100a. This ensures that even if the depth of the limiting groove 100a or the limiting pin has certain tolerances, the limiting pin can still be inserted into the limiting groove 100a.

[0065] For example, both the depth of the limiting groove 100a and the limiting pin have certain tolerances during the manufacturing process. If the depth of the limiting groove 100a is too large, the limiting pin may overextend, leading to unstable connection. If the depth of the limiting groove 100a is too small, the limiting pin may not be able to fully extend due to tolerance issues, or may even get stuck between the outer wall of the filter head 100 and the inner wall of the limiting sleeve 400. By setting the stepped structure 200d, the depth of the limiting pin extending into the limiting groove 100a is ensured to be within a certain range, thereby avoiding unstable connection or jamming problems caused by excessive or insufficient groove depth. Moreover, the stepped structure 200d provides a stable support point for the limiting pin, making it more secure within the mounting through hole 200a and less prone to shaking or falling off.

[0066] In some of these embodiments, please refer to [the relevant documentation]. Figure 7 The limiting sleeve 400 includes a first sub-sleeve 410, a second sub-sleeve 420, and a third sub-sleeve 430 connected in sequence. The first sub-sleeve 410 is movably fitted onto the mounting base 200 along the circumference of the filter head 100. That is, the diameter of the first sub-sleeve 410 is adapted to the outer diameter of the filter head 100, and the gap between them is minimized to ensure the stability of the axial movement of the limiting sleeve 400 and the mounting base 200. The inner diameter of the second sub-sleeve 420 is larger than the inner diameter of the first sub-sleeve 410, and the inner diameter of the third sub-sleeve 430 is larger than the inner diameter of the second sub-sleeve 420. The second sub-sleeve 420 has an inclined surface that slopes from the position where it connects with the third sub-sleeve 430 toward the position where it connects with the first sub-sleeve 410. In this way, during the axial movement of the limiting sleeve 400 and the mounting base 200, the limiting pin can gradually move into the limiting groove 100a under the guidance of the inclined surface, reducing the resistance between the limiting sleeve 400 and the limiting pin. After the filter head 100 and the mounting base 200 are assembled in place, the second sub-sleeve 420 prevents the limiting member 300 from exiting the limiting groove 100a. During the axial movement of the limiting sleeve 400 and the mounting base 200, when the third sub-sleeve 430 is opposite the mounting through hole 200a, there is a large space between the inner wall of the third sub-sleeve 430 and the outer wall of the limiting pin, which allows the limiting member 300 to exit the limiting groove 100a, thus realizing the disassembly of the filter head 100 and the mounting base 200.

[0067] In some embodiments, please refer to Figure 4 The filter head 100 is provided with a first positioning structure 110. When the third sub-sleeve 430 abuts against the first positioning structure 110, the second sub-sleeve 420 abuts against the limiting member 300 along the radial direction of the filter head 100. The filter head 100 is provided with a second positioning structure 120. When the mounting base 200 abuts against the second positioning structure 120, the limiting member 300 is aligned with the limiting groove 100a. This simplifies the installation of the mounting base 200 and the filter head 100, as well as the installation of the limiting sleeve 400 and the filter head 100. It ensures that after the mounting base 200 and the filter head 100 are assembled in place, the limiting member 300 is aligned with the limiting groove 100a. After the limiting sleeve 400 and the filter head 100 are assembled in place, the inner wall of the second sub-sleeve 420 can abut against the limiting member 300 to drive the limiting member 300 to move.

[0068] The filter head 100 may include a main body 140 and an assembly part 150. The main body 140 is provided with a limiting groove 100a. The assembly part 150 is connected to the main body 140 and is used to install with the filter bottle 20. The outer wall surface of the assembly part 150 may be stepped or arched to form the first positioning structure 110 and the second positioning structure 120 mentioned above.

[0069] For further details, please refer to Figure 4The main body 140, at the end furthest from the assembly part 150, is provided with a foolproof structure 170 to ensure that the filter element head 100 can only be installed onto the mounting base 200 in the correct manner, avoiding damage or performance degradation of the filter element head 100 due to incorrect installation or operation. The foolproof structure 170 can be formed by specific design elements such as shape, size, color, and markings, and this application does not impose any limitations on this.

[0070] To prevent the retaining sleeve 400 from detaching from the mounting base 200 after separating from the filter head 100, please refer to the following: Figure 2 and Figure 3 This application also includes an anti-detachment component 510, which protrudes from the outer periphery of the mounting base 200. The height of the anti-detachment component 510 protruding from the mounting base 200 is greater than the minimum distance between the mounting base 200 and the limiting sleeve 400 (i.e., the distance between the first sub-sleeve 410 and the mounting base 200). Thus, under the action of the anti-detachment component 510, after the mounting base 200 separates from the filter head 100, the limiting sleeve 400 remains fitted over the outside of the mounting base 200.

[0071] Optionally, the anti-detachment component 510 is a limiting ring, which is fitted around the outer periphery of the mounting base 200. The limiting ring can be made of silicone or rubber, which can improve the installation efficiency of the limiting ring. For further details, please refer to [link to relevant documentation]. Figure 6 The outer wall surface of the mounting base 200 has a recessed positioning ring groove 200f. A limiting ring is partially embedded in the positioning ring groove 200f and partially protrudes from the positioning ring groove 200f. This ensures the position of the anti-detachment component 510 on the mounting base 200, preventing displacement of the anti-detachment component 510 from affecting the assembly of other components. In other embodiments, the anti-detachment component 510 can be a snap-fit ​​component, fixed to the outer periphery of the mounting base 200 by snap-fit. Multiple snap-fit ​​components can be provided and spaced apart circumferentially along the mounting base 200. This application does not specifically limit the form of the anti-detachment component 510.

[0072] In summary, the assembly process of this application is as follows: first, the limiting pin is inserted into the mounting through hole 200a from the outside of the mounting base 200; then, the spring is sleeved on the outside of the mounting base 200; and finally, the limiting sleeve 400 is fitted onto the outer periphery of the mounting base 200 and abuts against the compression spring. Then, the anti-detachment component 510 is installed in the positioning ring groove 200f. Next, the top of the mounting base 200 is fixed to other fixed structures of the water purifier. The filter head 100 of the filter bottle 20 is aligned with the opening of the mounting base 200 and inserted into the mounting base 200. At this time, the mounting base 200 will move towards the filter bottle 20 relative to the filter head 100. After the end of the mounting base 200 near the filter bottle 20 abuts against the second positioning structure 120, the limiting pin will be aligned with the limiting groove 100a. Then, the restriction on the limiting sleeve 400 is released, and the spring automatically drives the limiting sleeve 400 to move towards the filter bottle 20 relative to the filter head 100. When the end of the limiting sleeve 400 near the filter bottle 20 (i.e., the third sub-sleeve 430) abuts against the first positioning structure 110, the inner side of the limiting sleeve 400 will drive the limiting pin to extend into the limiting groove 100a to fix the mounting base 200 and the filter head 100 relative to each other.

[0073] During disassembly, the limiting sleeve 400 moves in the opposite direction. Moving the limiting sleeve 400 away from the filter bottle 20 compresses the spring. The third sleeve 430 then aligns with the outer side of the limiting pin. At this point, the limiting pin is no longer restricted, and the filter element head 100 can be pulled out of the mounting base 200. The anti-detachment component 510 is located at the end of the mounting base 200 near the filter bottle 20. Specifically, after assembly, both the mounting base 200 and the limiting sleeve 400 are located on the upper part of the filter element head 100. After disassembling the filter element head 100 from the mounting base 200, to prevent the limiting sleeve 400 from detaching from the mounting base 200 under gravity, the anti-detachment component 510 is located at the lower part of the limiting sleeve 400, that is, at the end of the mounting base 200 near the filter bottle 20.

[0074] For further explanation, please refer to Figure 3In this application, a sealing ring 520 can be provided between the filter head 100 and the mounting base 200 to improve the sealing effect between them. The number of sealing rings 520 can be one or more, and multiple sealing rings 520 can be spaced apart between the filter head 100 and the mounting base 200. Since the filter head 100 and the mounting base 200 are fixed by a limiting pin, the degree of compression on the sealing ring 520 during assembly is less, effectively improving the service life and sealing effect of the sealing ring 520. Compared to the traditional threaded connection between the filter head 100 and the mounting base 200, the latter causes repeated compression of the sealing ring 520 during rotational installation, which may not only shorten the service life of the sealing ring 520 but also affect the durability and reliability of the seal. Therefore, the limiting pin fixing method of this application optimizes the convenience and safety of the assembly process while also improving sealing performance.

[0075] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this utility model. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0076] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A filter element locking device, characterized in that, include: The filter head has a limiting groove; The mounting base is sleeved on the outside of the filter element head and can move along the axial direction of the filter element head. The mounting base has a mounting through hole corresponding to the limiting groove. A limiting member is movably disposed through the mounting through hole, and after the filter head and the mounting base are assembled in place, the limiting member partially extends into the limiting groove; and A limiting sleeve, fitted over the mounting base and movable axially along the filter head, prevents the limiting member from exiting the limiting groove after the filter head and mounting base are properly assembled. An elastic element, one end of which is connected to the mounting base and the other end of which is connected to the limiting sleeve, is used to press the limiting sleeve tightly against the filter head.

2. The filter element locking device as described in claim 1, characterized in that, The elastic element is a spring, and the mounting base includes: The base body is fitted over the filter head and has a mounting through hole; The first limiting part is spaced apart from the mounting through hole and is exposed outside the limiting sleeve; The opposite ends of the spring abut against the first limiting part and the limiting sleeve, respectively.

3. The filter element locking device as described in claim 2, characterized in that, One end of the filter element head is used for installation with the filter bottle, and the first limiting part is disposed at the end of the mounting base away from the filter bottle.

4. The filter element locking device as described in claim 2, characterized in that, The first limiting part is an annular structure that surrounds the outer wall of the mounting base.

5. The filter element locking device as described in claim 2, characterized in that, The limiting member extends into or out of the limiting groove along the radial direction of the filter head.

6. The filter element locking device as described in claim 2, characterized in that, The limiting component includes a limiting pin, which is hemispherical on both radially opposite sides of the filter head.

7. The filter element locking device as described in claim 3, characterized in that, The mounting through hole includes a first hole segment and a second hole segment arranged sequentially from the outside to the inside and communicating with each other. The diameter of the first hole segment is larger than the diameter of the second hole segment to form a stepped structure between the first hole segment and the second hole segment. The limiting pin includes: The second limiting part is movably inserted into the first hole; and The third limiting part is connected to the first end of the second limiting part near the limiting groove. The outer diameter of the third limiting part is smaller than the outer diameter of the second limiting part, so that the third limiting part can pass through the second hole and extend into the limiting groove, and the second limiting part abuts against the step surface of the stepped structure.

8. The filter element locking device as described in claim 1, characterized in that, The limiting groove is an annular groove arranged along the circumference of the filter head.

9. The filter element locking device as described in claim 1, characterized in that, Multiple limiting grooves are provided and are spaced apart in the circumferential direction of the filter head.

10. The filter element locking device as described in claim 1, characterized in that, The limiting sleeve includes: The first sleeve is movably fitted onto the outside of the mounting base along the circumference of the filter head; The second sub-sleeve, connected to the first sub-sleeve, has an inner diameter larger than that of the first sub-sleeve. After the filter head is assembled with the mounting base, the second sub-sleeve prevents the limiting member from exiting the limiting groove; and The third sub-sleeve is connected to the side of the second sub-sleeve away from the first sub-sleeve. The inner diameter of the third sub-sleeve is larger than the inner diameter of the second sub-sleeve, so that when the third sub-sleeve is opposite to the mounting through hole, the limiting member can be disengaged from the limiting groove.

11. The filter element locking device as described in claim 10, characterized in that, The filter head is provided with a first positioning structure. When the third sub-sleeve abuts against the first positioning structure, the second sub-sleeve abuts against the limiting member along the axial direction of the filter head.

12. The filter element locking device as described in claim 1, characterized in that, The filter head is provided with a second positioning structure. When the mounting base abuts against the second positioning structure, the limiting member is positioned in the limiting groove.

13. The filter element locking device as described in any one of claims 1-12, characterized in that, Also includes: An anti-detachment component protrudes from the outer periphery of the mounting base and is used to prevent the limiting sleeve from detaching from the mounting base after the mounting base is separated from the filter head.

14. The filter element locking device as described in claim 13, characterized in that, The anti-detachment component is a limiting ring, which is sleeved on the outer periphery of the mounting base.

15. A filter element assembly, characterized in that, include The filter element locking device as described in any one of claims 1 to 14; Filter bottle, wherein the filter element head is installed at one end of the filter bottle; and The filter element is installed inside the filter bottle.

16. A water purifier, characterized in that, include: The housing has an installation opening; as well as The filter cartridge assembly as described in claim 15, wherein the mounting base is disposed within the housing, the filter bottle is detachably mounted within the housing via the filter head, and the filter bottle and the filter head can enter and exit the housing through the mounting opening.

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