Filter element locking device, filter element assembly and water purifier

Abstract

The invention 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] The present invention relates to the technical field of water purification equipment, and in particular to a filter element locking device, a filter element assembly and a water purifier. Background Art

[0002] With the development of water purification equipment technology, the use of water purifiers is becoming more and more popular. The filtering capacity of the filter element in the water purifier will decrease after a period of use. In order to maintain a good filtering effect, the filter element needs to be replaced. During the filter element replacement process, the filter element bottle needs to be removed from the housing of the water purifier. At this time, the filter element head of the filter element bottle needs to be disassembled from the mounting seat set in the housing.

[0003] In the existing technology, there are various ways to connect the filter head and the mounting seat. One common way is to use a clamping structure. Although it is convenient, improper operation can easily damage the elastic claws of the joint or the water inlet and outlet of the filter, thereby affecting the sealing performance and causing water leakage. Another way is to use a threaded connection. Although the connection is stable, the filter bottle needs to be rotated when replacing the filter, which undoubtedly increases the difficulty and inconvenience of operation when space is limited. Summary of the invention

[0004] The embodiments of the present application provide a filter element locking device, a filter element assembly, and a water purifier, which can improve the sealing performance between the filter element head and the mounting seat and realize convenient installation and disassembly.

[0005] In the first aspect, an embodiment of the present application provides a filter element locking device, including a filter element head, a mounting seat, a limit piece, a limit sleeve and an elastic member, the filter element head having a limit groove, one end of the filter element head being used for mounting with a filter bottle; the mounting seat being sleeved outside the filter element head and being able to move along the axial direction of the filter element head, the mounting seat having a mounting through hole corresponding to the limit groove; the limit piece being movably inserted into the mounting through hole, and the limit piece partially extends into the limit groove after the filter element head and the mounting seat are assembled in place; the limit sleeve being sleeved outside the mounting seat and being able to move along the axial direction of the filter element head, and after the filter element head and the mounting seat are assembled in place, the limit sleeve blocks the limit piece from withdrawing from the limit groove; an elastic member, one end of which is connected with the mounting seat, and the other end of which is connected with the limit sleeve, for pressing the limit sleeve against the filter element head.

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

[0007] The seat body is sleeved outside the filter element head and has a mounting through hole;

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

[0009] Wherein, two opposite ends of the spring abut against the first limiting portion and the limiting sleeve respectively.

[0010] In some embodiments, the first limiting portion is an annular structure arranged around the outer wall of the mounting seat.

[0011] In some embodiments, the first limiting portion is disposed at an end of the mounting base away from the filter bottle.

[0012] In some embodiments, the limiting member extends into or exits the limiting groove along the radial direction of the filter element head.

[0013] In some embodiments, the limiting member includes a limiting pin, and the limiting pin is disposed in a hemispherical shape along two opposite sides of the filter element head.

[0014] In some embodiments, the mounting through hole includes a first hole segment and a second hole segment which are sequentially arranged from the outside to the inside and are interconnected, the diameter of the first hole segment is larger than the diameter of the second hole segment, so as to form a step structure between the first hole segment and the second hole segment, and the limiting pin includes:

[0015] A second limiting portion is movably disposed in the first hole segment; and

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

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

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

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

[0020] A first sub-housing is movably sleeved on the outside of the mounting seat along the circumference of the filter element head;

[0021] a second sub-housing connected to the first sub-housing, the inner diameter of the second sub-housing being larger than the inner diameter of the first sub-housing, and the second sub-housing blocking the limiting member from withdrawing from the limiting groove after the filter element head and the mounting seat are assembled in place; and

[0022] The third sub-sleeve is connected to a side of the second sub-sleeve away from the first sub-sleeve, and the inner diameter of the third sub-sleeve is greater 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 withdrawn from the limiting groove.

[0023] In some embodiments, the filter cartridge 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 cartridge head.

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

[0025] In some embodiments, it also includes:

[0026] An anti-slip component is convexly arranged on the outer periphery of the mounting seat and is used to prevent the limiting sleeve from being detached from the mounting seat after the mounting seat is separated from the filter element head.

[0027] In some embodiments, the anti-dropping member is a limiting ring, and the limiting ring is sleeved on the outer circumference of the mounting seat.

[0028] In a second aspect, an embodiment of the present application provides a filter element assembly, comprising

[0029] A filter element locking device as described above;

[0030] A filter bottle, wherein the filter cartridge head is mounted at one end of the filter bottle; and

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

[0032] In a third aspect, an embodiment of the present application provides a water purifier, comprising:

[0033] a housing having a mounting opening; and

[0034] As in the filter element assembly described above, the mounting seat is disposed in the shell, the filter bottle is detachably mounted in the shell through the filter element head, and the filter bottle and the filter element head can enter and exit the shell from the mounting opening.

[0035] Based on the filter element locking device, filter element assembly and water purifier of the embodiment of the present application, the outer wall surface of the filter element head is provided with a limit groove, the mounting seat sleeve is arranged outside the filter element head and can move along the axial direction of the filter element head, and the mounting seat has a mounting through hole corresponding to the limit groove. The limit member can be movably inserted into the mounting through hole, and the limit sleeve is arranged outside the mounting seat and can move along the axial direction of the filter element head. After the filter element head and the mounting seat are assembled in place, the limit member will be aligned with the mounting through hole and can partially extend into the limit groove. The limit sleeve can also move along the axial direction of the filter element head. After the filter element head and the mounting seat are assembled in place, the limit sleeve is moved again. After the limit sleeve and the mounting seat are assembled in place, a force can be applied to the outer wall surface of the limit member to drive the limit member to extend into the limit groove and prevent the limit member from withdrawing from the limit groove.

[0036] In the present application, the spring can automatically press the limit sleeve against the filter cartridge head, and the limit sleeve can always maintain close contact with the filter cartridge head without the need for artificial application of additional pressure, thereby improving the stability of the limit member fixed in the limit groove and the sealing between the mounting seat and the filter cartridge head. Moreover, due to the automatic pressing effect of the elastic member, the user can operate more simply when installing or removing the filter cartridge. In addition, when the elastic member is worn or fails due to long-term use, the user can easily replace it with a new elastic member, thereby extending the service life of the filter cartridge locking device. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

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

[0039] Figure 2 An exploded schematic diagram of a filter element assembly provided in an embodiment of the present application;

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

[0041] Figure 4 A schematic diagram of the structure of another filter cartridge head provided in an embodiment of the present application;

[0042] Figure 5 A schematic diagram of the structure of a mounting base provided in an embodiment of the present application;

[0043] Figure 6 A schematic diagram of the structure of a position limiting member provided in an embodiment of the present application;

[0044] Figure 7 A schematic cross-sectional view of a limit sleeve provided in an embodiment of the present application.

[0045] Description of Figure 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. Anti-fool structure; 200. Mounting seat; 200a. Mounting through hole; 200b. First hole section; 200c. Second hole section; 200d. Step structure; 200e. Step surface; 200f. Positioning ring groove; 210. Seat body; 220. Mounting part; 250. First limiting part; 300. Limiting member; 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-slip member; 520. Sealing ring; 700. Elastic member; 20. Filter bottle; 30. Filter element.

[0047] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0048] In order to make the objectives, technical solutions and advantages of the present invention more clear, the following part will further describe the embodiments of the present application in detail in conjunction with the accompanying drawings.

[0049] When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Instead, they are only examples of devices and methods consistent with some aspects of the present invention as detailed in the attached claims.

[0050] In the description of the present invention, it should be understood that the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "plurality" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the previously associated objects are in an "or" relationship.

[0051] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in this specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

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

[0053] See also 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 in the filter bottle 20, and the filter element locking device 10 includes a filter element head 100 and a mounting seat 200. Among them, the filter element head 100 is installed at one end of the filter bottle 20 and blocks the bottle mouth of the filter bottle 20. The mounting seat 200 is arranged in the housing, the filter element head 100 and the mounting seat 200 are detachably connected, and the filter bottle 20 is detachably mounted in the housing through the filter element head 100. Among them, the end of the filter bottle 20 away from the filter element head 100 is connected to the water inlet waterway, the filter element head 100 is connected to the water outlet waterway through the mounting seat 200, and the waterway achieves the filtering effect through the filter element 30. After the water purifier has been used for a period of time, the filter element head 100 and the mounting seat 200 can be disassembled, and then the entire filter bottle 20 and the filter element 30 inside can be replaced. It is understandable that the directions of the water inlet and the water outlet can be interchangeably arranged, that is, the filter cartridge head 100 can be connected to the water inlet through the mounting seat 200, and the end of the filter bottle 20 away from the filter cartridge head 100 can be connected to the water outlet.

[0054] Optionally, a filter bottle 20 cover that can be screwed and removed can be provided at one end of the filter bottle 20 away from the filter cartridge head 100. The bottle mouth of the filter bottle 20 can be opened by screwing down the filter bottle 20 cover, and then the filter cartridge 30 can be replaced through the bottle mouth, and the filter bottle 20 cover can be screwed onto the filter bottle 20 again to seal the bottle mouth. The water inlet waterway is connected to the filter bottle 20 cover. Since the filter cartridge head 100 and the mounting seat 200 are detachable from each other, the filter bottle 20 can be taken out of the housing, and the filter bottle 20 cover can be removed from the filter bottle 20 without water leakage. Of course, the filter cartridge head 100 and the filter bottle 20 can also be set in a detachable form, and the filter cartridge 30 can also be replaced by removing the filter cartridge head 100 from the filter bottle 20.

[0055] In the prior art, there are various ways to connect the filter cartridge head 100 and the mounting seat 200. One common way is to use a snap-on structure. Although it is convenient, improper operation can easily damage the elastic claws of the joint or the water inlet and outlet of the filter cartridge 30, thereby affecting the sealing performance and causing water leakage. Another way is to use a threaded connection. Although the connection is stable, the filter cartridge 30 needs to be rotated when replacing the filter cartridge 30, which undoubtedly increases the difficulty and inconvenience of operation when space is limited. Based on this, the filter cartridge locking device 10 of the present application also includes a limit member 300, a limit sleeve 400 and an elastic member 700. The filter cartridge head 100, the mounting seat 200, the limit member 300, the limit sleeve 400 and the elastic member 700 cooperate with each other to enable the filter bottle 20 to be quickly installed or removed.

[0056] Please refer to Figures 2 to 4 The outer wall of the filter cartridge head 100 is provided with a limiting groove 100a, the mounting seat 200 is sleeved outside the filter cartridge head 100 and can move along the axial direction of the filter cartridge head 100, and the mounting seat 200 has a mounting through hole 200a corresponding to the limiting groove 100a. The limiting member 300 can be movably inserted into the mounting through hole 200a, and the limiting sleeve 400 is sleeved outside the mounting seat 200 and can move along the axial direction of the filter cartridge head 100. After the filter cartridge head 100 and the mounting seat 200 are assembled in place, the limiting member 300 will be aligned 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 cartridge head 100. After the filter cartridge head 100 and the mounting seat 200 are assembled in place, the limiting sleeve 400 is moved. After the limiting sleeve 400 and the mounting seat 200 are assembled in place, a force can be applied to the outer wall surface of the limiting member 300 to drive the limiting member 300 to extend into the limiting groove 100a and prevent the limiting member 300 from withdrawing from the limiting groove 100a.

[0057] The elastic member 700 may be in the form of a spring, one end of which is connected to the mounting seat 200, and the other end of which is connected to the limiting sleeve 400, for pressing the limiting sleeve 400 against the filter cartridge head 100. Of course, in other embodiments, the elastic member 700 may also be in the form of a tension spring, which is not limited in the present application. In the present application, the spring can automatically press the limiting sleeve 400 against the filter cartridge head 100, and the limiting sleeve 400 can always maintain close contact with the filter cartridge head 100 without artificially applying additional pressure, thereby improving the stability of the limiting member 300 fixed in the limiting groove 100a and the sealing between the mounting seat 200 and the filter cartridge head 100. Moreover, due to the automatic pressing effect of the elastic member 700, the user can operate more simply when installing or removing the filter cartridge 30. In addition, when the elastic member 700 is worn or fails due to long-term use, the user can easily replace it with a new elastic member 700, thereby extending the service life of the filter cartridge locking device 10.

[0058] See also Figure 1, Figure 3 and Figure 5 The mounting seat 200 further includes a first limiting portion 250, which is connected to the outer wall of the seat body 210, and is spaced apart from the mounting through hole 200a and exposed outside the limiting sleeve 400; wherein the first limiting portion 250 is disposed at an end of the mounting seat 200 away from the filter bottle 20. The opposite ends of the spring abut against the first limiting portion 250 and the limiting sleeve 400, respectively. The first limiting portion 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 position or uneven force.

[0059] Optional, see Figure 5 The first limiting portion 250 is an annular structure arranged around the outer wall of the mounting seat 200. In this way, the contact area between the spring and the first limiting portion 250 can be increased, thereby improving the stability of the spring. Of course, in other embodiments, the first limiting portion 250 can be a plurality of small protrusions arranged at intervals, or can be one or two arc-shaped protrusions. Here, the present application does not limit the specific form of the first limiting portion 250.

[0060] Optionally, the stopper 300 extends into or out of the stopper groove 100a along the radial direction of the filter cartridge head 100. In this way, the stopper 300 has the shortest movement stroke, less resistance, and higher positioning stability. Of course, the stopper 300 can also be set in an inclined or slightly inclined form, and the stopper 300 can be obliquely inserted into the stopper groove 100a, and this application does not limit this.

[0061] In some of these examples, see Figure 4 , the limiting groove 100a is an annular groove arranged along the circumference of the filter cartridge head 100. In this example, the limiting member 300 and the limiting groove 100a do not need to be positioned particularly accurately, and the positioning can be achieved by simply moving the mounting seat 200 and the filter cartridge head 100 in the axial direction and assembling them in place, and after the limiting member 300 extends into the limiting groove 100a, the filter cartridge head 100 and the mounting seat 200 can still be rotated to fine-tune the position.

[0062] In some of these examples, see Figure 2 , a plurality of limit grooves 100a are provided, and are spaced apart in the circumferential direction of the filter cartridge head 100. The number of limit members 300 can be set to one, or can be set to match the number of limit grooves 100a. In this example, each limit groove 100a can provide a fixed point, thereby enhancing the connection stability between the filter cartridge head 100 and the mounting seat 200.

[0063] For further information, see Figure 6The limiting member 300 includes a limiting pin, and the limiting pin is arranged in a hemispherical surface along the opposite sides of the filter cartridge head 100. The hemispherical design makes it smoother for the limiting pin to extend into the limiting groove 100a of the filter cartridge head 100, reducing the friction and resistance during the assembly process. Moreover, during the assembly process, the user does not need to manually operate the limiting pin, but only needs to move the mounting seat 200 relative to the filter cartridge head 100. Since the outer wall surface of the limiting pin is a hemispherical surface, the limiting pin will automatically slide into the limiting groove 100a under the pressure of the inner wall surface of the limiting sleeve 400, simplifying the assembly steps. When unlocking, there is no need for manual operation, and only needs to move the mounting seat 200 relative to the filter cartridge head 100. The limiting pin will automatically slide out of the limiting groove 100a under the pressure of the outer wall surface of the filter cartridge head 100, realizing quick and convenient unlocking.

[0064] In some of these examples, see Figure 5 The mounting through hole 200a includes a first hole section 200b and a second hole section 200c which are arranged in sequence from the outside to the inside and are interconnected. The diameter of the first hole section 200b is larger than that of the second hole section 200c, so as to form a step structure 200d between the first hole section 200b and the second hole section 200c. The limiting pin includes a second limiting portion 310 and a third limiting portion 320. The second limiting portion 310 can be movably arranged in the first hole section 200b. The third limiting portion 320 is connected to the first end of the second limiting portion 310 close to the limiting groove 100a. The outer diameter of the third limiting portion 320 is smaller than the outer diameter of the second limiting portion 310, so that the third limiting portion 320 can pass through the second hole section 200c and extend into the limiting groove 100a, and the second limiting portion 310 abuts against the step surface 200e of the step structure 200d. In this way, the limiting pin can be prevented from detaching from the inner side of the mounting through hole 200a. The step structure 200d ensures the depth of the limiting pin extending into the limiting groove 100a, so that even if the groove depth of the limiting groove 100a or the limiting pin has a certain tolerance, it can be ensured that the limiting pin can extend into the limiting groove 100a.

[0065] For example, the depth of the limit groove 100a and the limit pin have certain tolerances during the production process. If the depth of the limit groove 100a is too large, the limit pin may extend excessively, resulting in unstable connection; if the depth of the limit groove 100a is too small, the limit pin may not be fully extended due to tolerance problems, and may even be stuck between the outer wall of the filter head 100 and the inner wall of the limit sleeve 400. By setting the step structure 200d, it is ensured that the depth of the limit pin extending into the limit groove 100a is within a certain range, thereby avoiding the problem of unstable connection or stuck caused by too large or too small groove depth. In addition, the step structure 200d provides a stable support point for the limit pin, making it more secure in the installation through hole 200a and not easy to shake or fall off.

[0066] In some of these embodiments, please refer to Figure 7 , the limiting sleeve 400 includes a first sub-sleeve 410, a second sub-sleeve 420 and a third sub-sleeve 430 which are connected in sequence. The first sub-sleeve 410 is movably sleeved on the outside of the mounting seat 200 along the circumference of the filter cartridge head 100. In other words, the caliber of the first sub-sleeve 410 is adapted to the outer diameter of the filter cartridge head 100, and the gap between the two is minimal, ensuring the stability of the limiting sleeve 400 and the mounting seat 200 in the axial movement. 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. Among them, the second sub-sleeve 420 has an inclined surface, which is inclined from the position connected with the third sub-sleeve 430 to the position connected with the first sub-sleeve 410. In this way, during the axial movement of the limiting sleeve 400 and the mounting seat 200, the limiting pin can be guided by the inclined surface and gradually move into the limiting groove 100a, thereby reducing the resistance between the limiting sleeve 400 and the limiting pin. After the filter cartridge head 100 and the mounting seat 200 are assembled in place, the second sub-sleeve 420 blocks the limiting member 300 from withdrawing from the limiting groove 100a; during the axial movement of the limiting sleeve 400 and the mounting seat 200, when the third sub-sleeve 430 is opposite to 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, thereby enabling the limiting member 300 to withdraw from the limiting groove 100a, thereby realizing the disassembly of the filter cartridge head 100 and the mounting seat 200.

[0067] In some embodiments, please refer to Figure 4 , the filter cartridge head 100 is provided with a first positioning structure 110, and 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 cartridge head 100. The filter cartridge head 100 is provided with a second positioning structure 120, and when the mounting seat 200 abuts against the second positioning structure 120, the limiting member 300 is located in the limiting groove 100a. In this way, the installation operation of the mounting seat 200 and the filter cartridge head 100, as well as the installation operation of the limiting sleeve 400 and the filter cartridge head 100 can be simplified, and it can be ensured that after the mounting seat 200 and the filter cartridge head 100 are assembled in place, the limiting member 300 is located in the limiting groove 100a, and after the limiting sleeve 400 and the filter cartridge 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] Among them, the filter cartridge 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 for installation with the filter bottle 20, and the outer wall surface of the assembly part 150 can be set in a stepped or arched shape to form the above-mentioned first positioning structure 110 and the second positioning structure 120.

[0069] For further information, see Figure 4The end of the main body 140 away from the assembly part 150 is provided with a foolproof structure 170 to ensure that the filter cartridge head 100 can only be installed on the mounting seat 200 in a correct manner, thereby avoiding damage or performance degradation of the filter cartridge head 100 caused by incorrect installation or operation. The foolproof structure 170 can be formed by design elements such as a specific shape, size, color, logo, etc., and this application does not limit this.

[0070] In order to prevent the stop sleeve 400 from being separated from the mounting seat 200 after the mounting seat 200 and the filter cartridge head 100 are separated, please refer to Figure 2 and Figure 3 The present application further includes an anti-slipping member 510, which is protruding from the outer periphery of the mounting seat 200. The height of the anti-slipping member 510 protruding from the mounting seat 200 is greater than the minimum interval between the mounting seat 200 and the limiting sleeve 400 (i.e., the interval between the first sub-sleeve 410 and the mounting seat 200). In this way, under the action of the anti-slipping member 510, after the mounting seat 200 is separated from the filter cartridge head 100, the limiting sleeve 400 is still sleeved on the outside of the mounting seat 200.

[0071] Optionally, the anti-dropping member 510 is a limiting ring, which is sleeved on the outer periphery of the mounting seat 200. The limiting ring can be made of silicone or rubber, which can improve the installation efficiency of the limiting ring. Figure 6 , a positioning ring groove 200f is recessed on the outer wall surface of the mounting seat 200, and the limiting ring is partially embedded in the positioning ring groove 200f, and partially protrudes outside the positioning ring groove 200f. In this way, the position of the anti-slip component 510 on the mounting seat 200 can be ensured, and the displacement of the anti-slip component 510 can be prevented from affecting the assembly operation of other components. In other embodiments, the anti-slip component 510 can be a snap-fit ​​component, which is fixed to the outer periphery of the mounting seat 200 by snap-fitting, and there can be multiple snap-fit ​​components, which are arranged at intervals along the circumference of the mounting seat 200. Here, the present application does not specifically limit the form of the anti-slip component 510.

[0072] In summary, the assembly operation of the present application is to first install the limit pin into the installation through hole 200a from the outside of the mounting seat 200, then sleeve the spring on the outside of the mounting seat 200, sleeve the limit sleeve 400 on the outer periphery of the mounting seat 200 and abut against the compression spring. Then install the anti-dropping member 510 in the positioning ring groove 200f. Then, the top of the mounting seat 200 is fixed on other fixed structures of the water purifier, and the filter cartridge head 100 of the filter bottle 20 is aligned with the opening of the mounting seat 200 and inserted into the mounting seat 200. At this time, the mounting seat 200 will move relative to the filter cartridge head 100 in the direction close to the filter bottle 20. After one end of the mounting seat 200 close to the filter bottle 20 abuts against the second positioning structure 120, the limit pin will align with the limit groove 100a, and then the restriction on the limit sleeve 400 is released. The spring automatically drives the limit sleeve 400 to move relative to the filter cartridge head 100 in the direction close to the filter bottle 20. When one end of the limit sleeve 400 close to the filter bottle 20 (that is, the third sub-sleeve 430) abuts against the first positioning structure 110, the inner side of the limit sleeve 400 will drive the limit pin to extend into the limit groove 100a to fix the mounting seat 200 and the filter cartridge head 100 relatively.

[0073] During the disassembly operation, the movement direction of the limit sleeve 400 is opposite. Move the limit sleeve 400 away from the filter bottle 20 to compress the spring. The third sub-sleeve 430 will be aligned with the outer side of the limit pin. At this time, the limit pin will not be restricted, and the filter cartridge head 100 can be pulled out of the mounting seat 200. Among them, the anti-slip component 510 is arranged at one end of the mounting seat 200 close to the filter bottle 20. Specifically, after assembly, the mounting seat 200 and the limit sleeve 400 are both located at the upper part of the filter cartridge head 100. After the filter cartridge head 100 and the mounting seat 200 are disassembled, in order to prevent the limit sleeve 400 from detaching from the mounting seat 200 under the action of gravity, the anti-slip component 510 is arranged at the lower part of the limit sleeve 400, that is, at one end of the mounting seat 200 close to the filter bottle 20.

[0074] For further explanation, see Figure 3, a sealing ring 520 can be arranged between the filter cartridge head 100 and the mounting seat 200 of the present application to improve the sealing effect of the filter cartridge head 100 and the mounting seat 200. The number of sealing rings 520 can be one or more, and multiple sealing rings 520 can be arranged at intervals between the filter cartridge head 100 and the mounting seat 200. Since the filter cartridge head 100 and the mounting seat 200 of the present application are fixed by a limit pin, the degree of compression of the sealing ring 520 during the assembly process is small, which effectively improves the service life and sealing effect of the sealing ring 520. Compared with the threaded matching method adopted between the traditional filter cartridge head 100 and the mounting seat 200, the latter will cause the sealing ring 520 to be repeatedly squeezed during the rotation installation process, 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 limit pin fixing method of the present application can improve the sealing performance while optimizing the convenience and safety of the assembly process.

[0075] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

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

Claims

1. A filter element locking device, characterized in that: include: A filter cartridge head having a limiting groove, one end of which is used for mounting on a filter bottle; A mounting seat, which is sleeved outside the filter cartridge head and can move along the axial direction of the filter cartridge head, and the mounting seat has a mounting through hole corresponding to the limiting groove; A limiting member is movably arranged in the mounting through hole, and after the filter element head and the mounting seat are assembled in place, the limiting member partially extends into the limiting groove; and a limiting sleeve, which is sleeved outside the mounting seat and can move along the axial direction of the filter element head, and after the filter element head and the mounting seat are assembled in place, the limiting sleeve prevents the limiting member from withdrawing from the limiting groove; and An elastic member, one end of which is connected to the mounting seat, and the other end of which is connected to the limiting sleeve, is used to press the limiting sleeve onto the filter element head.

2. The filter element locking device according to claim 1, characterized in that: The elastic member is a spring, and the mounting seat comprises: The seat body is sleeved outside the filter element head and has a mounting through hole; A first limiting portion is spaced apart from the mounting through hole and exposed outside the limiting sleeve; Wherein, two opposite ends of the spring abut against the first limiting portion and the limiting sleeve respectively.

3. The filter element locking device according to claim 2, characterized in that: One end of the filter element head is used for mounting on the filter bottle, and the first limiting portion is arranged at an end of the mounting seat away from the filter bottle.

4. The filter element locking device according to claim 2, characterized in that: The first limiting portion is an annular structure arranged around the outer wall of the mounting seat.

5. The filter element locking device according to claim 2, characterized in that: The limiting member extends into or exits the limiting groove along the radial direction of the filter element head.

6. The filter element locking device according to claim 2, characterized in that: The limiting member comprises a limiting pin, and the limiting pin is arranged in a hemispherical shape on two opposite sides of the filter element head in the radial direction.

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

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

9. The filter element locking device according to claim 1, characterized in that: The limiting grooves are provided in plurality and are arranged at intervals in the circumferential direction of the filter element head.

10. The filter element locking device according to claim 1, characterized in that: The limiting sleeve comprises: A first sub-housing is movably sleeved on the outside of the mounting seat along the circumference of the filter element head; a second sub-housing connected to the first sub-housing, the inner diameter of the second sub-housing being larger than the inner diameter of the first sub-housing, and the second sub-housing blocking the limiting member from withdrawing from the limiting groove after the filter element head and the mounting seat are assembled in place; and The third sub-sleeve is connected to a side of the second sub-sleeve away from the first sub-sleeve, and the inner diameter of the third sub-sleeve is greater 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 withdrawn from the limiting groove.

11. The filter element locking device according to claim 10, characterized in that: The filter cartridge 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 cartridge head.

12. The filter element locking device according to claim 1, characterized in that: The filter cartridge head is provided with a second positioning structure, and when the mounting seat abuts against the second positioning structure, the limiting member is aligned with the limiting groove.

13. The filter element locking device according to any one of claims 1 to 12, characterized in that: Also includes: An anti-slip component is convexly arranged on the outer periphery of the mounting seat and is used to prevent the limiting sleeve from being detached from the mounting seat after the mounting seat is separated from the filter element head.

14. The filter element locking device according to claim 13, characterized in that: The anti-dropping component is a limiting ring, and the limiting ring is sleeved on the outer circumference of the mounting seat.

15. A filter element assembly, characterized in that: include The filter element locking device according to any one of claims 1 to 14; A filter bottle, wherein the filter cartridge head is mounted at one end of the filter bottle; and The filter element is installed in the filter bottle.

16. A water purifier, characterized in that: include: A housing having a mounting opening; as well as According to the filter element assembly as described in claim 15, the mounting seat is arranged in the shell, the filter bottle is detachably mounted in the shell through the filter element head, and the filter bottle and the filter element head can enter and exit the shell from the mounting opening.

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