Filter element component replacement structure and water purifier thereof

Abstract

The present application discloses a filter element assembly replacement structure and a water purifier thereof, wherein the filter element assembly replacement structure comprises: a filter element assembly, a base for installing the filter element assembly, a locking mechanism for locking the filter element assembly on the base, and an unlocking member for opening the locking mechanism; wherein the filter element assembly is provided with a force-bearing member for receiving a force applied by a user; the force-bearing member has a first position and a second position through action; when the force-bearing member moves from the first position to the second position, it can push the unlocking member to open the locking mechanism; when the force-bearing member is in the second position, the filter element assembly can be inserted into the base until it is locked by the locking mechanism. The filter element assembly replacement structure and the water purifier thereof provided by the present application can facilitate users to replace the filter element assembly of the water purifier.

Description

Technical Field

[0001] The present application relates to the field of water purifiers, and in particular to a filter element assembly replacement structure and a water purifier thereof. Background Art

[0002] With people's increasing health awareness and rising income levels, more and more people are paying attention to the health of drinking water. Because water is an essential substance for maintaining life and metabolism, the quality of drinking water is directly related to the health of the human body. According to a survey by the World Health Organization, 80% of human diseases are related to water, and poor water quality can cause a variety of diseases. For a long time, people have always believed that tap water is safe and hygienic.

[0003] However, due to the increasing water pollution, tap water has been repeatedly affected, causing people to question the safety of tap water. Along with the hidden dangers of water resource pollution, a batch of new equipment for the purpose of purifying water quality - water purifiers have been born, and they have developed rapidly in a short period of time. There is no doubt that in the longer term, water purifiers will become an indispensable drinking water equipment for every household. At present, most water purifiers on the market use physical filtration, and the main filtration levels are divided into PP cotton, activated carbon, RO membrane, etc. Among them, PP cotton is used to filter mud, sand, rust, etc., activated carbon is used to absorb residual chlorine and improve taste, and pure water is filtered through RO membrane.

[0004] Since water purifier products are mainly based on physical filtration, after a period of use, the filter element will become blocked and fail due to the accumulation of impurities. Therefore, the water purifier filter element needs to be disassembled and replaced regularly.

[0005] However, the existing water purifier filter replacement operation is complicated and laborious, and generally requires professional personnel to operate, which brings a lot of inconvenience to users and increases the cost of replacing the filter. Summary of the invention

[0006] In view of the above-mentioned problems in the prior art, the purpose of the present application is to provide a filter element assembly replacement structure and a water purifier thereof, so as to facilitate users to replace the filter element assembly of the water purifier.

[0007] In order to achieve the above objectives, this application provides the following technical solutions:

[0008] A filter element replacement structure comprises: a filter element assembly, a base for mounting the filter element assembly, a locking mechanism for locking the filter element assembly on the base, and an unlocking member for opening the locking mechanism; wherein:

[0009] The filter element assembly is provided with a force-bearing member for receiving force applied by a user; the force-bearing member has a first position and a second position through action;

[0010] When the force-bearing member moves from the first position to the second position, it can push the unlocking member to open the locking mechanism; when the force-bearing member is located in the second position, the filter element assembly can be inserted into the base until it is locked by the locking mechanism.

[0011] As a preferred embodiment, the force-bearing member is provided with a pushing portion; the unlocking member is provided with a receiving surface that matches the pushing portion; when the pushing portion moves from the first position to the second position, it contacts the receiving surface, thereby pushing the unlocking member to open the locking mechanism;

[0012] When the force-bearing member is located at the second position, when the filter element assembly is inserted into the base, at least a portion of the pushing portion can move from one side of the receiving surface to the other side of the receiving surface.

[0013] As a preferred embodiment, when the force-bearing member is located at the second position, when the filter element assembly is inserted into the base, at least a portion of the pushing portion can extend between the unlocking member and the filter element assembly.

[0014] As a preferred embodiment, when the force-bearing member rotates from the second position to the first position, part of the pushing portion can be moved out from between the unlocking member and the filter element assembly.

[0015] As a preferred embodiment, the filter element assembly replacement structure further includes a cutting-in structure; the cutting-in structure is used to enable the pushing portion to cut into contact with the receiving surface when the force-bearing member rotates from the first position to the second position.

[0016] As a preferred embodiment, the cutting structure includes a blocking wall arranged at one end of the unlocking member away from the base; the receiving surface is located on the outside of the blocking wall; one end of the blocking wall along the circumferential direction is a cutting end whose outer diameter does not exceed the inner diameter of the pushing part.

[0017] As a preferred embodiment, the blocking wall further has a spacer; at least a portion of the pushing portion can extend between the spacer and the filter element assembly; and the inner diameter of the cut-in end gradually increases as it extends toward the spacer.

[0018] As a preferred embodiment, an elastic structure is provided at one end of the unlocking member away from the base; the end of the elastic structure close to the force-bearing member can move elastically in the radial direction; the receiving surface and the cutting structure are arranged at the end of the elastic structure close to the force-bearing member.

[0019] As a preferred embodiment, the unlocking member includes a cylinder installed on the base and can be sleeved outside the filter element assembly; the elastic structure includes a clamping plate arranged on the cylinder; and a spacing gap is provided between the two sides of the clamping plate along the circumferential direction and the cylinder.

[0020] As a preferred embodiment, the clamping plate and the cylinder are integrally formed.

[0021] As a preferred embodiment, the thickness of at least part of the clamping plate is greater than the wall thickness of the cylinder.

[0022] As a preferred embodiment, the clamping plate is provided with a connecting portion close to the base and a bearing portion away from the base; the width of the connecting portion along the circumferential direction is smaller than the width of the bearing portion along the circumferential direction.

[0023] As a preferred embodiment, the force-bearing member comprises a handle rotatably mounted on the filter element assembly; the handle gradually stands upright when rotating from the first position to the second position;

[0024] The two ends of the handle are respectively provided with a pushing portion, and the cylinder body is provided with two corresponding clamping plates.

[0025] As a preferred embodiment, the pushing portion includes a pushing surface arranged on the force-bearing member and rotating around a rotation axis; when the rotating member rotates from a first position to a second position, the distance between the contact portion between the pushing surface and the receiving surface and the rotation axis gradually increases.

[0026] As a preferred implementation, the radial thickness of at least a portion of the pushing portion gradually decreases in a direction away from the rotation axis.

[0027] As a preferred embodiment, the filter element assembly replacement structure is further provided with a guide structure; the guide structure is used for aligning the pushing portion and the spacing portion along the direction of the filter element assembly.

[0028] As a preferred embodiment, a guide protrusion is provided on the side wall of the filter element assembly;

[0029] The guide structure includes a guide surface arranged on the inner wall of the cylinder and a guide through hole passing through the cylinder wall of the cylinder; the guide surface spirally extends from an end away from the base to an end close to the base; the end of the guide surface close to the base passes into the guide through hole; the guide surface is used to receive the guide protrusion to guide the guide protrusion into the guide through hole; the guide through hole extends along the length direction of the filter element assembly.

[0030] As a preferred embodiment, along the length direction of the filter element assembly, the distance between the receiving surface and the lower end of the guide surface is smaller than the distance between the pushing portion and the guide protrusion when the force-bearing member is in the second position.

[0031] As a preferred embodiment, at least one guide surface is provided on the inner wall of the cylinder, and the spiral extension angle of the guide surface is an integer multiple of 180 degrees.

[0032] As a preferred embodiment, the force-bearing member is provided with a pushing portion for pushing the unlocking member; the pushing portion has a switchable pushing position and a release position; when the pushing portion is located at the release position, the force-bearing member does not interfere with the unlocking member; when the pushing portion is located at the pushing position, the pushing portion can push the unlocking member to open the locking mechanism.

[0033] As a preferred implementation, the force-bearing member can drive the pushing portion to rotate around a rotation axis; the pushing portion can move along the rotation axis to switch between the pushing position and the releasing position.

[0034] As a preferred embodiment, an elastic member is further provided for applying an elastic force to the pushing portion to move toward the release position.

[0035] As a preferred embodiment, when the force-bearing member is located at any position between the first position and the second position, the filter element assembly can be inserted into the base until it is locked by the locking mechanism.

[0036] A water purifier comprises: a filter element assembly replacement structure according to any one of the above embodiments.

[0037] Beneficial effects:

[0038] The filter element assembly replacement structure provided in this embodiment is very convenient because it is provided with a force-bearing member, which makes it easy for users to operate the filter element assembly through the force-bearing member. When disassembling the filter element assembly, the user can apply force to the force-bearing member to move it from the first position to the second position, which makes disassembly easy. When installing the filter element assembly, the filter element assembly can be inserted into the base when the force-bearing member is in the second position until it is locked by the locking mechanism, so that even if the force-bearing member is in the second position, the user can still install the filter element assembly on the base without changing the state of the force-bearing member, which is convenient for user operation.

[0039] With reference to the following description and accompanying drawings, specific embodiments of the present invention are disclosed in detail, indicating the manner in which the principles of the present invention can be adopted. It should be understood that the embodiments of the present invention are not limited in scope. Within the spirit and scope of the appended claims, the embodiments of the present invention include many changes, modifications and equivalents.

[0040] Features described and / or illustrated with respect to one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments.

[0041] It should be emphasized that the term “include / comprises” when used herein refers to the presence of features, integers, steps or components, but does not exclude the presence or addition of one or more other features, integers, steps or components. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the embodiments of the present invention 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 in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without paying creative labor.

[0043] Figure 1 It is a schematic diagram of a filter element component replacement structure provided in an embodiment of the present invention;

[0044] Figure 2 yes Figure 1 A structural schematic diagram of a force-bearing member;

[0045] Figure 3 yes Figure 1 Another structural schematic diagram of a force-bearing member and a pushing member;

[0046] Figure 4 yes Figure 3 Schematic diagram with cover;

[0047] Figure 5 yes Figure 1 A partial cross-sectional schematic diagram of a filter element assembly inserted into a base;

[0048] Figure 6 yes Figure 1 A partial cross-sectional schematic diagram of the middle filter element assembly being inserted into the base;

[0049] Figure 7 yes Figure 1 Schematic diagram of the middle base;

[0050] Figure 8 It is a schematic diagram of another filter element assembly replacement structure provided in an embodiment of the present invention;

[0051] Fig. 9 yes Figure 8 A partial cross-sectional schematic diagram of a filter element assembly inserted into a base;

[0052] Fig.10 yes Figure 8 A partial cross-sectional schematic diagram of a filter element assembly inserted into a base;

[0053] Fig.11 yes Figure 8 Schematic diagram of the base;

[0054] Fig.12 yes Figure 8 Schematic diagram of the knob;

[0055] Fig.13 yes Figure 8 Schematic diagram of the supporting cylinder structure;

[0056] Fig.14 yes Figure 8 Schematic diagram of the supporting cylinder structure;

[0057] Fig.15 yes Figure 8 Schematic diagram of the filter element assembly structure;

[0058] Fig.16 yes Fig.15 A partial enlarged view of

[0059] Fig.17 It is a schematic diagram of the structure of a filter element assembly and an unlocking member provided in an embodiment of the present invention;

[0060] Fig.18 yes Fig.17 A partial enlarged view of

[0061] Fig.19 yes Fig.17 Another schematic diagram of;

[0062] Fig. 20 yes Fig.19 A partial enlarged view of

[0063] Fig.21 yes Fig.17 Another schematic diagram of;

[0064] Fig. 22 yes Fig.17 A schematic diagram of the unlocking component structure;

[0065] Fig.23 yes Fig. 22 A top view of

[0066] Fig.24 yes Fig. 22 A front view of

[0067] Fig.25 yes Fig. 22 An enlarged view of the pallet;

[0068] Fig.26 yes Fig. 22 Internal schematic diagram of

[0069] Fig. 27 yes Fig.17 A schematic diagram of the structure of a filter element assembly;

[0070] Fig.28 is a schematic diagram of another filter element assembly replacement structure provided in an embodiment of the present invention;

[0071] Fig.29 yes Fig.28 Schematic diagram of filter element assembly;

[0072] Fig.30 yes Fig.28 Schematic diagram of the pushing portion being located in the release position;

[0073] Fig.31 yes Fig.28 Schematic diagram of the pushing portion being located in the pushing position. DETAILED DESCRIPTION

[0074] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0075] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be another element centered thereon. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be another element centered thereon at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0076] 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 herein in the specification of the present invention 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.

[0077] See also Figures 1 to 16The filter element assembly replacement structure provided in the embodiment of the present application includes: a filter element assembly 200; an operating portion that can be externally force-applied is provided on the filter element assembly 200; a fixed base 100, which is used to install the filter element assembly 200; a locking mechanism; the locking mechanism has a locking position for assembling the filter element assembly 200 on the base 100, and a release position for allowing the filter element assembly 200 to be separated from the base 100; when the operating portion is externally force-applied, the locking mechanism moves to the release position.

[0078] In this embodiment, the base 100 is provided for the installation of the filter element assembly 200 and is fixed. During the installation of the filter element, the base 100 can remain stationary, and the user can complete the removal of the filter element only by the filter element movement. In one embodiment, the filter element assembly replacement structure can form (part of) the water purifier housing. The base 100 is fixed relative to the water purifier housing.

[0079] The locking mechanism can be located on the base 100 or on the filter element assembly 200. In a feasible embodiment, the locking mechanism is located on the filter element assembly 200. The locking mechanism moves from the locking position to the releasing position by applying force to the filter element assembly 200 through the operating part, so that the filter element assembly 200 can be detached from the base 100. Figures 1 to 16 In the illustrated embodiment, the locking mechanism is located on the base 100 , and force is applied to the filter element assembly 200 by the operating portion, so that the locking mechanism moves from the locking position to the releasing position, and the filter element assembly 200 can be detached from the base 100 .

[0080] In this embodiment, the locking mechanism may have a reset element (not shown), which applies a biasing force to the locking mechanism to reset it to the locked position. Relying on the reset element, the locking mechanism can switch between the locked position and the released position. After the filter element assembly 200 is separated from the base 100, the locking mechanism can be reset to the locked position by the reset element. Specifically, the reset element can include an elastic element, such as a spring.

[0081] To facilitate the user to install the filter element assembly 200 , in a preferred embodiment, the filter element assembly replacement structure may further include an unlocking mechanism that can open the locking mechanism when the filter element assembly 200 is inserted into the base 100 .

[0082] The process of opening the locking mechanism through the unlocking mechanism can refer to the process of the locking mechanism moving from the locking position to the release position. The maximum opened position (also referred to as the second release position) may be the same as or different from the above-mentioned release position (for example: the opening diameter is larger or smaller than the release position, as long as the filter element assembly 200 can complete the insertion and locking).

[0083] Of course, the opening process of the locking mechanism may also be different from the process of the locking mechanism moving from the locking position to the release position. For example, the opening process of the locking mechanism by the unlocking mechanism can be a pushing and resetting process along the insertion direction (similar to the swing of a hinge), and the movement from the locking position to the release position can be a radial translation movement.

[0084] The unlocking mechanism can be provided on the filter element mechanism or on the base 100. By providing the unlocking structure, the locking mechanism can be opened when the filter element assembly 200 is inserted into the base 100. The filter element assembly 200 can be installed on the base 100 by operating the filter element assembly 200 and utilizing the unlocking mechanism, thus completing the installation of the filter element assembly 200, which is very convenient.

[0085] The filter element assembly 200 in this embodiment has an operating part for the user to apply force. The user can unlock and release the locking mechanism by operating the operating part of the filter element assembly 200, so that the filter element assembly 200 can be separated from the base 100. At this time, the user only needs to pull the filter element assembly 200 out of the base 100. The operating part can be a certain part on the filter element assembly 200 for the user to apply force, or it can be a force-bearing part provided on the filter element assembly 200 for the user to apply force. The operating part moves together with the filter element assembly 200 during the process of replacing the filter element assembly 200.

[0086] The filter element assembly replacement structure in this embodiment allows the user to operate the filter element assembly 200 only, while the base 100 remains fixed, and there is no need to operate the base 100, which is convenient for the user to operate the filter element assembly 200 with one hand. At the same time, when the filter element assembly 200 is removed from the base 100 using the operating portion of the filter element assembly 200, the space required to move the base 100 when removing the filter element assembly 200 can also be reduced when the base 100 remains fixed, which provides better installation flexibility.

[0087] In addition, in the present embodiment, the base 100 of the filter element assembly replacement structure is fixed, and only the filter element assembly 200 needs to be operated, which also allows the water purifier to be placed horizontally, that is, the length direction of the filter element assembly 200 is parallel to the horizontal direction, which not only has higher installation flexibility, but also is more convenient for users to operate.

[0088] The filter element assembly 200 has an insertion end 1 for inserting into the base 100, and an operating end 2 facing away from the insertion end 1. To facilitate user operation, the operating portion is located on the operating end 2. The operating portion may be provided with a structure that facilitates user force application.

[0089] In the embodiment, the filter element assembly 200 is a cylindrical structure as a whole. The insertion end 1 of the filter element assembly 200 can be inserted into the base 100. Accordingly, the base 100 can be provided with an insertion hole 15 for the insertion end 1 to be inserted. At the same time, sealing measures can be provided in the insertion end 1 and the insertion hole 15 to prevent fluid leakage and avoid poor water production effect. The insertion end 1 has a flow channel that leads to the interior of the filter element assembly 200, and cooperates with the flow channel 7 in the base 100 to filter the incoming water.

[0090] In one embodiment, the locking mechanism includes a clamping assembly 6 disposed on the base 100 and capable of clamping the insertion end 1. The clamping assembly 6 includes at least one clamping member distributed along the circumferential direction. When the clamping assembly 6 moves from the locking position to the releasing position, at least one of the clamping members moves radially outward. When the clamping assembly 6 moves from the releasing position to the locking position, at least one of the clamping members moves radially inward.

[0091] The locking mechanism is installed inside the base 100, and the clamping member includes a clamping plate arranged inside the base 100. A plurality of clamping plates surround and form a clamping opening, and constitute a part of the insertion hole 15. Among them, the plurality of clamping plates can move in the radial direction. A spring is arranged inside the base 100 to apply a biasing force to the plurality of clamping plates to move toward the locking position, so that the clamping plates remain in the locking position when there is no external force.

[0092] Of course, the locking mechanism can also be other mechanisms, such as an insertion structure, a flip structure, etc. As long as the locking mechanism can switch between the locking position and the release position through action, the action of the locking mechanism is not limited to radial movement, and can also be rotation, insertion, deformation, etc.

[0093] In this embodiment, the insertion end 1 is provided with a blocking portion 12 that cooperates with the snap assembly 6. The blocking portion 12 is blocked by the snap assembly 6 when the snap assembly 6 is in the locked position, so that the filter element assembly 200 cannot be separated from the base 100. Fig.15 , Fig.16 As shown, a convex ring structure 14 is provided on the side wall of the insertion end 1 , and the blocking portion 12 may be the end surface of the convex ring structure 14 close to the operating end 2 .

[0094] Specifically, the snap assembly 6 is formed with a snap opening for the insertion end 1 to pass through. When the snap assembly 6 is in the locked position, the blocking portion 12 is located at a side of the snap opening away from the operating end 2 and cannot pass through the snap opening. When the snap assembly 6 is in the released position, the blocking portion 12 can pass through the snap opening.

[0095] like Fig. 9As shown, when the filter element assembly 200 is installed on the base 100, the side of the locking assembly 6 away from the operating end 2 has a fitting surface (not shown) that can fit with the blocking portion 12. By cooperating with the fitting surface and the blocking portion 12, the insertion end 1 of the filter element assembly 200 is restricted from being pulled out from the insertion hole 15 of the base 100, thereby locking the filter element assembly 200.

[0096] Based on the above description, in order to facilitate the user to install the filter element assembly 200 on the base 100, the filter element assembly replacement structure can also be provided with an unlocking mechanism. The unlocking mechanism can make at least one clamping member move radially outward when the filter element assembly 200 is inserted into the base 100, so that the blocking portion 12 of the filter element assembly 200 passes through the engaging opening. After the blocking portion 12 passes through the engaging opening, the engaging assembly 6 is reset to the locking position to lock the filter element assembly 200.

[0097] The unlocking mechanism includes a first inclined surface 31 provided on the side of the blocking portion 12 of the insertion end 1 away from the operating end 2 and / or on the side of the snap assembly 6 close to the operating end 2. When the filter element assembly 200 is inserted into the base 100, the blocking portion 12 of the filter element assembly 200 relies on the first inclined surface 31 to open the snap assembly 6 until it passes through the snap opening.

[0098] In this embodiment, the size of the engaging opening expanded by the unlocking structure can be the same as or different from the size of the engaging opening in the release position. The first inclined surface 31 is provided on the engaging assembly 6; the first inclined surface 31 makes the cross-sectional area of ​​the engaging opening gradually decrease along the direction in which the filter element assembly 200 is inserted into the base 100.

[0099] like Fig. 9 In the embodiment shown, the insertion end 1 and the engaging assembly 6 are both provided with a first inclined surface 31. The first inclined surface 31 of the insertion end 1 is provided on the convex ring structure 14 and is located on a side of the blocking portion 12 away from the operating end 2.

[0100] In an embodiment, the filter element replacement structure may also be provided with an opening mechanism that cooperates with the operating part. When the operating part is subjected to external force, the opening mechanism is driven to move, so that the locking mechanism moves from the locking position to the releasing position. The opening mechanism transmits the force applied to the operating part, thereby opening the locking mechanism. The opening mechanism may be a part of the filter element assembly 200, such as Figures 8 to 16 The opening mechanism may also be a component provided outside the filter element assembly 200, such as Figures 1 to 7 The embodiment shown.

[0101] In this embodiment, the opening mechanism drives the locking mechanism to move by action, and during the driving process, the base 100 is fixed. The opening mechanism is used to drive the locking mechanism to the release position by applying force to the operating part of the filter element assembly 200 without driving the base 100 to move. In this embodiment, the opening mechanism can transmit the force applied to the operating part to achieve the position switching of the locking mechanism to the release position.

[0102] The opening mechanism drives the locking mechanism to move by its own action, and there are many ways for the opening mechanism to move. For example, the opening mechanism can drive the locking mechanism by moving along the length direction of the filter element assembly 200, or by rotating the locking mechanism. Of course, in possible embodiments, the opening mechanism can also drive the locking mechanism by other movements, such as: the opening mechanism has two matching elements, and the position switching of the locking mechanism is achieved by the separation or engagement of the two elements, etc.

[0103] In such Figures 8 to 16 The specific embodiment shown. When the operating part is subjected to external force, the opening mechanism rotates, and the opening mechanism drives the locking mechanism to move from the locking position to the releasing position by rotating. In this embodiment, the opening mechanism can be provided on the filter element assembly 200 and move with the filter element assembly 200. Under such a structure, the user only needs to apply force to the operating part to rotate the filter element assembly 200 to open the locking mechanism to the releasing position and complete the disassembly of the filter element assembly 200, and the operation is simple.

[0104] In this embodiment, the opening mechanism can rotate together with the filter element assembly 200. Specifically, the opening mechanism includes a support portion 30 protruding radially on the filter element assembly 200. The operating portion can enable the filter element assembly 200 to drive the support portion 30 to rotate around an axis parallel to the length direction of the filter element assembly 200; the support portion 30 radially expands the engaging assembly 6 from the locking position to the releasing position by rotating.

[0105] The insertion end 1 has two or more support parts 30 evenly distributed along the circumference. To facilitate the support part 30 to radially support the clamping assembly 6 to the release position when rotating, the support part 30 and the clamping assembly 6 are located at the same axial position when the filter element assembly 200 is locked by the locking mechanism.

[0106] The outer diameter of the support portion 30 may be larger than the outer diameter of the blocking portion 12, or smaller than the outer diameter of the blocking portion 12. Fig.16In the illustrated embodiment, an annular groove structure 28 is provided on the side of the blocking portion 12 close to the operating end 2, and a support portion 30 is disposed in the annular groove structure 28, wherein the support portion 30 includes a support protrusion protruding radially outward, and two support protrusions are evenly arranged along the circumferential direction, and an outer diameter of the support portion 30 (support protrusion) is equal to an outer diameter of the blocking portion 12 (of course, in some embodiments, the outer diameter of the support portion 30 (support protrusion) may not be equal to the outer diameter of the blocking portion 12).

[0107] Furthermore, the engaging assembly 6 is formed with an engaging opening (not shown). The edge of the engaging opening has a first portion and a second portion at different distances from the axis. The distance between the first portion and the axis is greater than the distance between the second portion and the axis. When the support portion 30 is aligned with the first portion in the radial direction, the engaging assembly 6 is not opened to the release position; when the support portion 30 is rotated to be aligned with the second portion in the radial direction, the engaging assembly 6 is opened to the release position. The engaging opening is contacted by the first portion and the second portion at different distances from the axis on the support portion 30, so that the support portion 30 is opened radially when the support portion 30 is in the second position.

[0108] The distance between the first part and the axis is L1, the distance between the second part and the axis is L2, and the distance between the outer edge of the support part 30 and the axis is L3; wherein L1≥L3>L2. Further, the distance between the first part and the axis is the maximum distance between the edge of the snap-fitting opening and the axis; the distance between the second part and the axis is the minimum distance between the edge of the snap-fitting opening and the axis, the distance between the snap-fitting opening and the axis gradually decreases from the first part to the second part, and the distance between the second part and the axis gradually increases from the first part to the first part.

[0109] In a specific embodiment, the butt joint of two adjacent clamping members forms the first portion, and the middle position of the clamping member forms the second portion. In a specific embodiment, when the two clamping members are relatively connected and located in the locking position, the clamping opening formed by the two clamping members is elliptical in shape.

[0110] In order to facilitate the user to pull out the filter element assembly 200 from the base 100 and reduce the resistance caused by the sealing fit between the insertion end 1 and the base 100. In a preferred embodiment, the base 100 is further provided with a push-out structure. When the filter element assembly 200 drives the support portion 30 to rotate from the first position to the second position, the push-out structure pushes the filter element assembly 200 in the direction in which the filter element assembly 200 is separated from the base 100.

[0111] Specifically, the base 100 has an insertion port for inserting the filter element assembly 200; the ejection structure includes an arc-shaped protrusion 19 provided on the side of the base 100 having the insertion port. Specifically, the arc-shaped protrusion 19 is located on the surface of the base 100 having the insertion port. The height of the arc-shaped protrusion 19 protruding from the surface of the base 100 gradually increases along the direction in which the support portion 30 rotates from the first portion to the second portion. Specifically, the position of the arc-shaped protrusion 19 may be smaller than the outer diameter of the filter element assembly 200. A protrusion 29 ( Fig.16 The filter element assembly 200 is formed with an annular surface around the insertion end 1.

[0112] When the filter element assembly 200 is installed on the base 100, the annular surface of the filter element assembly 200 fits with the surface of the base 100. At this time, the protrusion 29 of the filter element assembly 200 is located at the lowest point of the arc-shaped protrusion 19 (the position not protruding from the surface of the base 100), and the rotation of the filter element assembly 200 drives the protrusion 29 to rotate around the axis, and the protrusion 29 contacts the long strip-shaped upper end surface of the arc-shaped protrusion 19 away from the base 100 and is supported by the arc-shaped protrusion 19. As the filter element assembly 200 continues to rotate along the axis, the arc-shaped protrusion 19 gradually pushes the protrusion 29 in the direction of the filter element assembly 200 being separated from the base 100, so that the filter element assembly 200 is gradually separated from the base 100.

[0113] Of course, the ejection structure is not limited to the above-mentioned arc-shaped protrusion 19, and can also be a guide rail that gradually moves away from the base 100 along the rotation direction from the first part to the second part, etc. The ejection structure can also be set on the filter element assembly 200. The ejection structure converts the rotation of the filter element assembly 200 into a force that causes the filter element assembly 200 to move axially away from the base 100, thereby pushing the filter element assembly 200 out of the base 100.

[0114] In this embodiment, the operating portion includes a knob 20 fixed to the operating end 2. The filter element assembly 200 is driven to rotate by the knob 20. The knob 20 is a flat structure and is perpendicular to the end surface of the operating end 2. In other embodiments, the operating portion can also be a handle or the like. Considering that there are many ways to implement the operating portion, it only needs to be able to drive the filter element assembly 200 to rotate, and this application does not impose any other restrictions.

[0115] Following the above embodiment, a support portion 30 and a matching snap-fit ​​assembly 6 are provided. When the filter element assembly 200 is inserted and installed into the base 100, the filter element assembly 200 can be inserted into the base 100 along the direction in which the support portion 30 is aligned with the first part of the snap-fit ​​opening. Under the action of the first inclined surface 31 (unlocking mechanism), the filter element assembly 200 radially expands the snap-fit ​​assembly 6 to allow the blocking portion 12 to pass through the snap-fit ​​opening, and then the snap-fit ​​assembly 6 is reset to the locking position to lock the filter element assembly 200. At this time, the support portion 30 will not affect the blocking portion 12 passing through the snap-fit ​​assembly 6, nor will it expand the snap-fit ​​assembly 6, and the snap-fit ​​assembly 6 and the support portion 30 are located at the same axial position. The outer edge of the support portion 30 can be in contact with the edge of the snap-fit ​​opening (also referred to as the inner surface, inner edge).

[0116] When the insertion end 1 contacts the locking assembly 6, due to the presence of the reset element, the user can apply a force to the filter element assembly 200 along the length direction of the filter element assembly 200 through the operating part, and rely on the action of the first inclined surface 31 to push the locking assembly 6 radially, thereby radially expanding the locking opening, so that the blocking part 12 passes through the locking assembly 6.

[0117] In order to facilitate the user to install the filter element assembly 200, the locking mechanism locks the filter element assembly 200, so it is necessary to position the support portion 30 at the first position of the clamping assembly 6. Based on this consideration, the base 100 may also be provided with a guide structure. The guide structure can guide the support portion 30 to the first position when the filter element assembly 200 is inserted into the base 100.

[0118] Through the guide structure, the support part 30 can be guided to align with the first part along the length direction of the filter element assembly 200 (which can also be regarded as the above-mentioned axial direction), and by applying force to the operating part to make the blocking part 12 pass through the snap-fit ​​opening, when the filter element assembly 200 is locked by the snap-fit ​​assembly 6 (that is, the filter element assembly 200 is in a state of being installed on the base 100), the support part 30 is aligned with the first part in the radial direction. In this way, the filter element assembly 200 can be located at a predetermined position during installation, and the snap-fit ​​assembly 6 can be unlocked to the release position by rotating the filter element assembly 200 through the operating part. The operation is very convenient, and there is no need for the user to manually locate the position of the filter element assembly 200, and both installation and disassembly are very fast.

[0119] Specifically, the guide structure includes a first guide rail 21. The filter element assembly 200 is provided with a guide protrusion 26 that moves along the first guide rail 21. When the filter element assembly 200 is inserted into the base 100, the guide protrusion 26 moves along the first guide rail 21 and the support portion 30 is guided to the first position.

[0120] In addition, in order to facilitate the user to know that the support part 30 has been aligned with the second part when removing the filter element assembly 200, the clamping assembly 6 is opened to the release position to prevent the user from being unable to pull out the filter element assembly 200 due to insufficient rotation or excessive rotation. The guide structure also includes a second guide rail 22 for the movement of the guide protrusion 26, and a connecting guide rail 23.

[0121] The connecting guide rail 23 connects the first guide rail 21 with the second guide rail 22. When the guide protrusion 26 moves along the connecting guide rail 23, the support portion 30 opens the locking assembly 6 from the locking position to the releasing position. When the filter element assembly 200 moves away from the base 100, the guide protrusion 26 moves along the connecting guide rail 23. Furthermore, the second guide rail 22 extends linearly along the length direction of the filter element assembly 200; the first guide rail 21 extends in a curved manner along the length direction of the filter element assembly 200; and the connecting guide rail 23 extends circumferentially.

[0122] like Fig.13 , Fig.14 As shown, a first guide rail 21, a second guide rail 22, and a guide rail 23 connecting the first guide rail 21 and the second guide rail 22 form a guide rail group. The guide structure includes two guide rail groups, and a first inlet and outlet 24 and a second inlet and outlet. The first inlet and outlet 24 and the second inlet and outlet are used for the guide protrusion 26 to enter and exit the guide rail group. Through the first inlet and outlet 24 and the second inlet and outlet, the guide protrusion 26 can be removed from the guide structure, so that the filter element assembly 200 can be completely removed for easy replacement.

[0123] The first guide rail 21 in one guide rail group and the second guide rail 22 in another guide rail group are connected to the first inlet and outlet 24. The second guide rail 22 in the guide rail group and the first guide rail 21 in the other guide rail group are both connected to the second inlet and outlet. The two guide rail groups can be symmetrically distributed, and two guide protrusions 26 can be correspondingly provided in the circumference of the filter element assembly 200, corresponding to the first inlet and outlet 24 and the second inlet and outlet, respectively. In other embodiments, the first guide rail 21 and the second guide rail 22 may not share the same inlet and outlet.

[0124] The first guide rail 21, the second guide rail 22, and the connecting guide rail 23 may be a through-hole structure in the shape of a long strip, or may be a groove structure 28 that provides a moving track. Figure 13 to Figure 14In the embodiment shown, the base 100 is further provided with a support cylinder 300; the support cylinder 300 is sleeved outside the filter element assembly 200 when the filter element assembly 200 is installed on the base 100. The guide structure is provided on the support cylinder 300. The first guide rail 21, the second guide rail 22, and the connecting guide rail 23 all penetrate the support cylinder 300 in the radial direction. Of course, the first guide rail 21, the second guide rail 22, and the connecting guide rail 23 can also be in the form of grooves.

[0125] The following describes in detail the Figures 8 to 16 The embodiments shown in the accompanying drawings are provided for a better understanding of the present application.

[0126] like Fig.15 The filter element assembly 200 has a cylindrical body 27 and an insertion end 1. A flat knob 20 forming an operating portion is provided on the end surface of the filter element assembly 200 facing away from the insertion end 1. The filter element assembly 200 can be rotated around an axis parallel to the length direction of the filter element assembly 200 by means of the knob 20.

[0127] The base 100 is provided with an insertion hole 15 for the insertion end 1 to enter, and an insertion port is formed on the outer surface of the base 100. The base 100 is also fixedly connected with a support cylinder 300. When the filter element assembly 200 is installed and inserted into the base 100, the support cylinder 300 surrounds the filter element assembly 200. The support cylinder 300 can support the filter element assembly 200 to prevent all the weight of the filter element assembly 200 from being borne by the joint between the insertion end 1 and the insertion hole 15, and at the same time, prevent the filter element assembly 200 from being exposed for a long time and covered with dust.

[0128] The support cylinder 300 is also provided with a guide structure for guiding the insertion or extraction of the filter element assembly 200. The guide structure includes two guide rail groups and a first inlet and outlet 24 and a second inlet and outlet. Each guide rail group includes a first guide rail 21, a second guide rail 22, and a guide rail 23 connecting the first guide rail 21 and the second guide rail 22. The first guide rail 21 extends circumferentially along the length direction of the support cylinder 300, and the second guide rail 22 extends linearly along the length direction of the support cylinder 300.

[0129] like Fig.13 , Fig.14As shown, the first guide rail 21 in one guide rail group and the second guide rail 22 in another guide rail group are connected to the first inlet and outlet 24; the second guide rail 22 in the guide rail group and the first guide rail 21 in the other guide rail group are both connected to the second inlet and outlet. A connecting section 25 is also provided between the first guide rail 21 and the second guide rail 22 and the first inlet and outlet 24. The connecting section 25 also extends in a straight line, and when the filter element assembly 200 moves away from the first inlet and outlet 24 along the connecting section 25, the connecting section 25 is configured to guide the filter element assembly 200 into the first guide rail 21. The base 100 and the support cylinder 300 may be connected to each other or indirectly, and the present application does not impose any restrictions thereto. The base 100 and the support cylinder 300 may participate in forming the outer shell of the water purifier.

[0130] The outer diameter of the insertion end 1 is smaller than the outer diameter of the cylindrical body 27 of the filter element assembly 200. A convex ring structure 14 is provided on the insertion end 1. The convex ring structure 14 is provided with a blocking surface (blocking portion 12) on the side close to the operating end 2, and a supporting protrusion (supporting portion 30). The outer diameter of the supporting protrusion is equal to the outer diameter of the convex ring structure 14. There are two supporting protrusions evenly distributed along the circumference, so that the locking assembly 6 can be opened to the release position by rotating 90 degrees. A first inclined surface 31 is provided on the side of the convex ring structure 14 facing away from the operating end 2.

[0131] The base 100 has a base shell, a snap-fitting opening is arranged on the base shell, and the snap-fitting assembly 6 is installed inside the base shell to form a snap-fitting opening located inside the insertion opening (the insertion opening and the snap-fitting opening are both a part of the insertion hole 15). The snap-fitting assembly 6 has two clamping plates connected to each other, and each clamping plate is provided with an arc edge forming the edge of the snap-fitting opening. The docking parts of the two clamping plates form two first parts, and correspond to the two supporting protrusions one by one. When the supporting protrusions are rotated 90 degrees, the two supporting protrusions are aligned with the middle positions of the two clamping plates respectively, and the two clamping plates are pushed radially outward to the release position. An elastic member is provided inside the base 100 to apply movement toward the locking position to the two clamping plates. The edge of the snap-fitting opening is also a first inclined surface 31, so as to cooperate with the first inclined surface 31 of the convex ring structure 14, so as to be pushed open and passed by the convex ring structure 14.

[0132] When the user needs to remove the filter element assembly 200 from the base 100 (or the water purifier housing), the user first rotates the filter element assembly 200 through the knob 20. The guide protrusion 26 on the filter element assembly 200 rotates 90 degrees around the connecting guide rail 23 to one end of the second guide rail 22. The wall at the end of the connecting guide rail 23 can prevent the guide protrusion 26 from continuing to move circumferentially, reminding the user that the filter element assembly 200 can be pulled out at this time. In the process of rotating the filter element assembly 200, the support protrusion rotates from the first position to the second position to open the locking assembly 6 from the locking position to the release position. At the same time, under the action of the arc-shaped protrusion 19, the filter element assembly 200 automatically moves outward (in the direction of pulling out) a certain distance as it rotates, reducing the force applied by the user. The user pulls the filter element assembly 200 outward, and the two guide protrusions 26 move along the second guide rail 22 until they are moved out from the first inlet and outlet 24 and the second inlet and outlet.

[0133] When the user needs to install the (new) filter element assembly 200 on the base 100 (or the water purifier housing), the two guide protrusions 26 enter the guide structure from the first inlet and outlet 24 and the second inlet and outlet, and continue to push the filter element assembly 200 and be guided by the connecting section 25 to the first guide rail 21 until the two support protrusions are aligned with the two first parts along the axial direction. Then, the filter element assembly 200 is pushed toward the base 100 through the knob 20, and the insertion end 1 of the filter element assembly 200 opens and passes the clamping assembly 6 through the first inclined surface 31. After the blocking portion 12 passes, the clamping assembly 6 is reset to the locking position to lock the insertion end 1, and the two support portions 30 are aligned with the two first parts along the radial direction, completing the installation of the filter element assembly 200.

[0134] See also Figures 1 to 7 In the embodiment shown, when the operating part is subjected to external force, the opening mechanism moves along the length direction of the filter element assembly 200. The opening mechanism moves along the length direction of the filter element assembly 200 to move the locking mechanism from the locking position to the releasing position.

[0135] In this embodiment, the opening mechanism can be movably mounted on the base 100, or can be removed and installed together with the filter element assembly 200. Of course, the opening mechanism can also include a plurality of detachable components, some of which are mounted on the base 100, and the other of which are mounted on the filter element assembly 200.

[0136] Specifically, the operating portion is provided with a rotatable force-bearing member 3. The opening mechanism includes a propping member 4 that cooperates with the force-bearing member 3. The propping member 4 can move along the direction in which the filter element assembly 200 is inserted into the base 100 when the force-bearing member 3 is rotated by force, and prop the engaging assembly 6 from the locking position to the releasing position.

[0137] In order to reduce the resistance effect caused by the sealing measures between the filter element assembly 200 and the base 100, the force-bearing member 3 can also make the filter element assembly 200 move away from the base 100 when it is rotated by force. Specifically, after the opening member 4 moves along the length direction of the filter element assembly 200 to open the clamping assembly 6 to the release position, the opening member 4 can be limited by the base 100 and cannot continue to move toward the base 100 along the direction of the filter element assembly 200. At this time, the force-bearing member 3 can continue to rotate, and the opening member 4 applies an opposite force to the force-bearing member 3 or the filter element assembly 200, pushing the filter element assembly 200 to move in the direction away from the base 100.

[0138] The end of the expansion member 4 close to the base 100 is provided with an expansion portion; the clamping assembly 6 is provided with an action portion that can cooperate with the expansion portion. The expansion portion and / or the action portion are provided with a second inclined surface 13. The second inclined surface 13 enables the expansion member 4 to radially expand the clamping assembly 6 from the locking position to the releasing position when the filter element assembly 200 is inserted into the base 100.

[0139] The force-bearing member 3 rotates around a rotation axis perpendicular to the length direction of the filter element assembly 200. The force-bearing member 3 has a first rotation position and a second rotation position along its rotation direction. When the rotating member rotates from the first rotation position to the second rotation position, the propping member 4 is pushed to move along the direction in which the filter element assembly 200 is inserted into the base 100.

[0140] The force-bearing member 3 includes a handle. To facilitate the user's holding operation, the handle gradually stands upright at the end of the filter element assembly 200 away from the insertion end 1 when the handle rotates from the first rotation position to the second rotation position. Figures 2 to 4 In the embodiment shown, the force bearing member 3 is semicircular, and both ends are rotatably connected to the operating end 2. It should be noted that the force bearing member 3 of the present application is not limited thereto, and the force bearing member 3 may also be in other shapes, such as a straight rod shape, a broken line shape, a partial arc shape, etc.

[0141] In order to push the opening member 4 to move toward the base 100 by the rotating member, Figure 2 In the embodiment shown, the rotating member has a push surface 8 that rotates around the rotation axis. When the rotating member rotates from the first rotation position to the second rotation position, the distance between the contact portion between the push surface 8 and the spreading member 4 and the rotation axis gradually increases.

[0142] Please continue reading Figure 2The push surface 8 is located at both ends of the rotating member, and the push surface 8 can be a curved surface structure. The rotating member in this embodiment has a simple structure, and the push surface 8 that rotates around the rotation axis (perpendicular to the length direction of the filter element assembly 200, that is, perpendicular to the above axis, and the pivot shaft 9 provides the rotation axis) is provided on the rotating member to push the expansion member 4 to move along the length direction of the filter element assembly 200.

[0143] like Figure 3 , Figure 4 In another embodiment shown, the opening mechanism further includes a pusher 10 disposed on the operating end 2. When the force-bearing member 3 rotates from the first rotation position to the second rotation position, the pusher 10 moves radially outward. When the pusher 10 moves radially outward, the opening member 4 moves in the direction of the filter element assembly 200 being inserted into the base 100. In order to prevent the pusher 10 from being exposed, a shielding cover 18 may be further provided on the operating end 2 to shield the pusher 10.

[0144] The rotating member is also provided with a push rod 16 connecting its two ends. The operating end 2 is provided with two push members 10. When the rotating member rotates from the first rotation position to the second rotation position, the push rod 16 directly pushes one push member 10 radially outward. Correspondingly, the push member 10 will simultaneously push the other push member 10 in the opposite direction (schematically exemplified as two push members 10 meshing with a fixed gear at the same time, through which the two push members 10 move in opposite radial directions). Specifically, the outer end of the push member 10 in the radial direction is provided with a third inclined surface 11. When the push member 10 moves radially outward, the third inclined surface 11 pushes the propulsion member 4 to move in the direction in which the filter element assembly 200 is inserted into the base 100.

[0145] The expansion member 4 includes a cylindrical structure installed on the base 100 and can be sleeved outside the filter element assembly 200. The expansion portion is arranged at one end of the cylindrical structure close to the base 100. The cylindrical structure can move along the length direction of the filter element assembly 200 relative to the base 100. That is, the expansion member 4 is movably (indirectly or directly) supported on the base 100. Two or more insertion protrusions 5 are circumferentially arranged at one end of the cylindrical structure close to the base 100, and the second inclined surface 13 is arranged on the insertion protrusion 5.

[0146] In this embodiment, if Figure 7 As shown, the base shell is provided with a plurality of rectangular openings 17, and the action part of the clamping plate (also a raised structure, Figure 7The protruding structure at the position indicated by the middle number 6 (which is a part of the clamping plate) is located in the rectangular opening 17 and is also provided with a second inclined surface 13. When the upper end of the cylindrical structure of the opening member 4 is pushed by the rotating member, the opening member 4 drives the insertion protrusion 5 to move toward the base 100, and the opening part cooperates with the action part to convert the axial movement of the opening member 4 into the radial movement of the clamping plate, so that the clamping assembly 6 moves to the release position.

[0147] In this embodiment, the base 100 is further provided with a support cylinder 300. The support cylinder 300 is sleeved outside the filter element assembly 200 when the filter element assembly 200 is installed on the base 100. The above-mentioned cylinder structure is sleeved between the support cylinder 300 and the filter element assembly 200. Among them, the expansion member 4 is movably installed on the support cylinder 300.

[0148] The following describes in detail the Figures 1 to 7 The embodiments shown are provided for a better understanding of the present application.

[0149] The filter element assembly 200 has a cylindrical body 27 and an insertion end 1. A rotatable semicircular handle is provided on the end surface of the operating end 2 of the filter element assembly 200 that is opposite to the insertion end 1. By raising the handle on the end surface of the operating end 2, the expansion cylinder (expansion member 4) can be pushed along the length direction of the filter element assembly 200.

[0150] The expansion cylinder is movably supported in the support cylinder 300, and the base 100 is provided with an insertion hole 15 for the insertion end 1 to enter, and an insertion port is formed on the outer surface of the base 100. The support cylinder 300 is also fixedly connected to the base 100. When the filter element assembly 200 is installed and inserted into the base 100, the support cylinder 300 surrounds the filter element assembly 200. The support cylinder 300 can support the filter element assembly 200 to prevent all the weight of the filter element assembly 200 from being borne by the joint between the insertion end 1 and the insertion hole 15, and at the same time, prevent the filter element assembly 200 from being exposed for a long time and covered with dust. The support cylinder 300 and the expansion cylinder can both guide the insertion or removal of the filter element assembly 200, so that the insertion end 1 is aligned with the insertion port of the base 100 during installation.

[0151] The outer diameter of the insertion end 1 of the filter element assembly 200 is smaller than the outer diameter of the cylindrical body 27 of the filter element assembly 200. A convex ring structure 14 is provided on the insertion end 1, and a blocking surface (blocking portion 12) is provided on the side of the convex ring structure 14 close to the operating end 2. A first inclined surface 31 is provided on the side of the convex ring structure 14 facing away from the operating end 2.

[0152] The base 100 has a base shell, a snap-fitting opening is arranged on the base shell, and the snap-fitting assembly 6 is installed inside the base shell to form a snap-fitting opening located inside the insertion opening (the insertion opening and the snap-fitting opening are both a part of the insertion hole 15). The snap-fitting assembly 6 has two clamping plates (a kind of clamping member) connected to each other, and each clamping plate is provided with an arc edge forming the edge of the snap-fitting opening. The butt joints of the two clamping plates form two first portions, which correspond one to one with the two supporting protrusions.

[0153] An elastic member is provided inside the base 100 to force the two clamping plates to move toward the locking position. The edge of the clamping opening is also a first inclined surface 31, so as to cooperate with the first inclined surface 31 of the convex ring structure 14, so as to be pushed open and passed by the convex ring structure 14. A rectangular opening 17 is provided on the base shell, and the action part of the clamping plate extends into the rectangular opening 17 and cooperates with the insertion protrusion 5 at the end of the expansion tube. Due to the presence of the elastic member, when the filter element assembly 200 is installed on the base 100 or is not installed on the base 100 (that is, the clamping assembly 6 is in the locking position), the clamping plate will push the expansion member 4 away from the base 100 through the first inclined surface 31, so that the expansion member 4 is reset.

[0154] When the user needs to remove the filter element assembly 200 from the base 100 (or the water purifier housing), first turn the handle to erect the handle at the operating end 2. As the handle is erected, the push surface 8 of the handle pushes the expansion tube toward the base 100. Under the action of the second inclined surface 13, the expansion tube causes the clamping plate to move radially to open the clamping opening to the release position. The handle continues to be erected, and the end of the insertion protrusion 5 is pressed against the limit (such as the limit part on the clamping plate or the base 100) and cannot continue to move toward the base 100. At this time, under the reaction force of the expansion tube, the filter element assembly 200 automatically moves outward (in the direction of extraction) a certain distance as the handle rotates to reduce the force applied by the user. Finally, the user can pull the filter element assembly 200 outward, and the filter element assembly 200 does not need to be rotated during the extraction process.

[0155] When the user needs to install the (new) filter element assembly 200 on the base 100 (or the water purifier housing), the user uses the handle or directly holds the cylindrical body of the filter element assembly 200 to put the filter element assembly 200 into the expansion cylinder and the support cylinder 300. Then, the filter element assembly 200 is pushed toward the base 100, and the insertion end 1 of the filter element assembly 200 opens and passes the clamping assembly 6 through the first inclined surface 31. After the blocking portion 12 passes, the clamping assembly 6 is reset to the locking position to lock the insertion end 1, and the installation of the filter element assembly 200 is completed.

[0156] Of course, during the insertion process, when the handle is in the upright state (located at the second rotation position), the push surface 8 of the handle can also directly push the support tube to move toward the base 100, and rely on the second inclined surface 13 to drive the clamping assembly 6 from the locking position to the release position, ensuring that the blocking portion 12 of the insertion end 1 passes through the clamping opening. Furthermore, the force-bearing member 3 and the opening member 4 in this embodiment can also serve as an unlocking mechanism, and the first inclined surface 31 in the above embodiment does not need to be provided.

[0157] See also Figures 17 to 27 The embodiment of the present application provides a filter element assembly replacement structure, comprising: a filter element assembly 200, a base 100 for mounting the filter element assembly 200, a locking mechanism for locking the filter element assembly 200 on the base 100, and an unlocking member 40 for opening the locking mechanism.

[0158] The filter element assembly 200 is provided with a force receiving member 3 for receiving force applied by the user. The force receiving member 3 has a first position and a second position through action. Fig.17 , Fig.19 As shown, Fig.17 It is a schematic diagram of a state where the force-bearing member 3 is located at the first position and is installed on the base 100. Fig.19 It is a schematic diagram of the state of the filter element assembly 200 being inserted into the base 100 when the force-bearing member 3 is located at the second position.

[0159] When the force bearing member 3 moves from the first position to the second position, it can push the unlocking member 40 to open the locking mechanism. When the force bearing member 3 is in the second position, the filter element assembly 200 can be inserted into the base 100 until it is locked by the locking mechanism.

[0160] The force-bearing member 3 has a first position and a second position through an action, and its action form can be rotation, translation, or even flipping. Among them, the force applied to the force-bearing member 3 can be a flipping force or a pressing force. Preferably, the force-bearing member 3 can rotate around a rotation axis. Specifically, in this embodiment, in order to facilitate user operation, the force-bearing member 3 can rotate around a pivot shaft 9, and the first position can be the first rotation position in the above embodiment, and the second position can be the second rotation position in the above embodiment.

[0161] In this embodiment, the base 100 is used to install the filter element assembly 200. The base 100 can be stationary or movable. For example, during the process of unlocking the locking mechanism, the base 100 can move. Of course, in this embodiment, the base 100 is preferably kept stationary.

[0162] The locking mechanism can be located on the base 100 or on the filter element assembly 200, and this application does not limit this. In this embodiment, the base 100 and the locking mechanism can refer to the base 100 and the locking mechanism in the above embodiment, and will not be repeated in this embodiment.

[0163] The unlocking member 40 can unlock the locking mechanism. Depending on the different locking forms of the locking mechanism, the unlocking member 40 has different unlocking structures. Among them, the unlocking member 40 can refer to the propping member in the above embodiment. Of course, the unlocking member 40 can also have a further structure to cooperate with the force-bearing member 3 to maintain the convenience of the user to install and remove the filter element assembly 200.

[0164] The filter element assembly replacement structure provided in this embodiment is provided with a force-bearing member 3, which is convenient for the user to operate the filter element assembly 200 through the force-bearing member 3, and is very convenient. When disassembling the filter element assembly 200, the user applies force to the force-bearing member 3 to move it from the first position to the second position, and disassembly is convenient. When installing the filter element assembly 200, the filter element assembly 200 can be inserted into the base 100 when the force-bearing member 3 is in the second position until it is locked by the locking mechanism, so that even if the force-bearing member 3 is in the second position, the user can still install the filter element assembly 200 on the base 100 without changing the state of the force-bearing member 3, which is convenient for user operation.

[0165] The force-bearing member 3 is provided with a pushing portion 50. When the force-bearing member 3 moves from the first position to the second position, the pushing portion 50 can push the unlocking member 40 to form an unlocking action, thereby unlocking and opening the locking mechanism. In this embodiment, when the pushing portion 50 rotates from the first position to the second position, it pushes the unlocking member 40 to move along the length direction of the filter element assembly 200, so that the unlocking member 40 moves toward the base 100 and is inserted into the locking mechanism, thereby unlocking and opening the locking mechanism.

[0166] Specifically, the unlocking member 40 is provided with a receiving surface 61 that cooperates with the pushing portion 50. The receiving surface 61 may be a plane. The pushing portion 50 pushes the unlocking member 40 by cooperating with the receiving surface 61. The receiving surface 61 is located at one end of the unlocking member 40 away from the base 100.

[0167] When the pushing portion 50 moves from the first position to the second position, it contacts the receiving surface 61, thereby pushing the unlocking member 40 to open the locking mechanism. In order to avoid interference or excessive interference between the force-bearing member 3 and the unlocking member 40 when the force-bearing member 3 is in the second position, when the filter element assembly 200 is inserted into the base 100, at least part of the pushing portion 50 can move from one side of the receiving surface 61 to the other side of the receiving surface 61 when the force-bearing member 3 is in the second position.

[0168] like Fig.19, Fig. 20 When the force-bearing member 3 is located at the second position, when the filter element assembly 200 is inserted into the base 100, at least part of the pushing portion 50 can extend between the unlocking member 40 and the filter element assembly 200. When at least part of the pushing portion 50 extends between the unlocking member 40 and the filter element assembly 200, the pushing portion 50 is allowed to radially expand the unlocking member 40 as it moves.

[0169] To ensure that the pushing part 50 is in contact with the receiving surface 61 and bears force, the locking mechanism can be unlocked smoothly, and the filter element assembly 200 can be unloaded from the base 100. When the force-bearing member 3 rotates from the second position to the first position, part of the pushing part 50 can be moved out from between the unlocking member 40 and the filter element assembly 200. When the force-bearing member 3 is in the first position, the pushing part 50 can be located on the upper side of the receiving surface 61 as a whole, without contacting the receiving surface 61.

[0170] When the force-bearing member 3 is at the first position, the pushing portion 50 is located outside the unlocking member 40. The pushing portion 50 does not contact the receiving surface 61. When the force-bearing member 3 gradually moves from the first position to the second position, the pushing portion 50 gradually contacts the receiving surface 61, gradually pushes the unlocking member 40 toward the base 100, and then unlocks the locking mechanism.

[0171] like Fig.17 , Fig.18 As shown. When the force-bearing member 3 is not inserted into the base 100 and is in the second position, the end 51 of the pushing portion 50 can be inserted between the unlocking member 40 and the filter element assembly 200, and the unlocking member 40 will not hinder the movement of the pushing portion 50. Therefore, the user can operate the filter element assembly 200 when the force-bearing member 3 is in the second position, which is convenient for the user to operate until the filter element assembly 200 is completely installed on the base 100, and the user does not need to change the filter element assembly 200 from the second position to the first position during the installation process. Then, the user can apply force to move the force-bearing member 3 from the second position to the first position, so that the pushing portion 50 is removed from between the unlocking member 40 and the filter element assembly 200, which is convenient for the subsequent removal of the filter element assembly 200 from the base 100.

[0172] When the user needs to remove the filter element assembly 200, the force-bearing component is forced from the first position to the second position, and the pushing portion 50 contacts the receiving surface 61. As the force-bearing component gradually approaches the second position, the pushing portion 50 gradually pushes the unlocking member 40 toward the base 100 through the receiving surface 61 until the locking mechanism is unlocked. Finally, the user pulls the filter element assembly 200 out of the base 100 through the force-bearing member 3 located in the second position to complete the removal of the filter element assembly 200.

[0173] Please continue reading Figures 17 to 25In this embodiment, the filter element assembly replacement structure may further include a cutting-in structure. The cutting-in structure is used to make the push portion 50 cut into and contact the receiving surface 61 when the force-bearing member 3 rotates from the first position to the second position. The cutting-in structure can prevent the push portion 50 from entering between the unlocking member 40 and the filter element assembly 200 again when rotating to the second position and failing to contact the receiving surface 61, thereby ensuring successful unlocking.

[0174] Specifically, the cutting structure may include a blocking wall 62 disposed at one end of the unlocking member 40 away from the base 100. The receiving surface 61 is located on the outer side of the blocking wall 62. One end of the blocking wall 62 along the circumferential direction is a cutting end 63 whose outer diameter does not exceed the inner diameter of the pushing portion 50. When the force-bearing member 3 is in the first position, the pushing portion 50 is located on the side of the blocking wall 62 away from the base 100. When the reader faces Fig.17 , Fig.18 When the push portion 50 is located above the blocking wall 62 .

[0175] When the force-bearing member 3 rotates from the second position to the second position, the pushing portion 50 first contacts the cut-in end 63. One end of the blocking wall 62 along the circumferential direction is the cut-in end 63 whose outer diameter does not exceed the inner diameter of the pushing portion 50. Thus, the pushing portion 50 cuts in along the outer side of the cut-in end 63 to avoid cutting into the inside of the blocking wall 62. As the force-bearing member 3 gradually approaches the second position, the pushing portion 50 gradually contacts the receiving surface 61 to push the unlocking member 40.

[0176] like Fig.25 As shown. The receiving surface 61 and the blocking wall 62 form a step structure. The receiving surface 61 is located outside the blocking wall 62 and extends in the same direction as the blocking wall 62. The extension length of the blocking wall 62 can be the same as the extension length of the receiving surface 61. Among them, the receiving surface 61 can be roughly an arc surface, and correspondingly, the blocking wall 62 can also be roughly an arc structure.

[0177] like Fig.25 As shown. The blocking wall 62 also has a spacer 64. At least a portion of the push portion 50 can extend between the spacer 64 and the filter element assembly 200. The inner diameter of the cut-in end 63 gradually increases as it extends toward the spacer 64. The gap distance between the spacer 64 and the filter element assembly 200 is greater than the gap distance between the cut-in end 63 and the filter element assembly 200, so that the push portion 50 can be inserted between the spacer 64 and the filter element assembly 200 when it moves toward the base 100 when it is in the second position.

[0178] In this embodiment, the force-bearing member 3 includes a handle rotatably mounted on the filter element assembly 200. To facilitate the user's grip, the handle can be a semicircular handle. The handle gradually stands upright when rotating from the first position to the second position. The two ends of the handle are respectively provided with a pushing portion 50. The cylinder 41 is provided with two corresponding receiving surfaces 61 and a blocking wall 62.

[0179] The pushing portion 50 includes a pushing surface 8 arranged on the force bearing member 3 and rotating around a rotation axis. The pushing surface 8 is a curved surface, specifically an arc surface, so that when the pushing portion 50 rotates around the pivot axis 9, the pushing surface 8 can push the unlocking member 40 to move toward the base 100.

[0180] When the rotating member rotates from the first position to the second position, the distance between the contact portion between the pushing surface 8 and the receiving surface 61 and the rotation axis gradually increases. To facilitate the insertion of the pushing portion 50 into the inner side of the spacer 64, the outer diameter of the end portion 51 of the pushing portion 50 is smaller than the outer diameter of other portions. Fig.21 As shown, the end 51 of the push portion 50 has a smaller thickness. Of course, in other embodiments, the end 51 of the push portion 50 may also be an inwardly bent structure. In this way, when installing the filter element assembly 200, it is only necessary to insert the end 51 of the push portion 50 into the inner side of the spacer 64 and continue to push the filter element assembly 200 toward the base 100.

[0181] Considering that the unlocking member 40 is prevented from excessively interfering with the pushing portion 50 during the installation and removal of the filter element assembly 200, it is convenient for users to install the filter element assembly 200. An elastic structure is provided at one end of the unlocking member 40 away from the base 100. The end of the elastic structure close to the force-bearing member 3 can elastically move in the radial direction. The receiving surface 61 and the cutting structure are provided at one end of the elastic structure close to the force-bearing member 3.

[0182] Through the elastic structure, when the push part 50 is inserted between the filter element assembly 200 and the elastic structure, as the inserted portion of the push part 50 becomes longer, the elastic structure can expand radially outward, thereby facilitating the insertion of the push part 50, avoiding obstruction to the push part 50, and facilitating the user to install the filter element assembly 200 in place. When the filter element assembly 200 is removed, the push part 50 moves to the second position, and the push part 50 gradually cuts into the upper side of the receiving surface 61 (the side away from the base 100) through the cutting end 63. At this time, the elastic structure can shrink radially inward, so that the push part 50 can smoothly match and contact with the receiving surface 61, and gradually push the unlocking member 40 to open the locking mechanism.

[0183] The unlocking member 40 includes a barrel 41 installed on the base 100 and can be sleeved on the outside of the filter element assembly 200 (refer to the structure of the barrel 41 in the above embodiment). The elastic structure includes a clamping plate 60 arranged on the barrel 41. To correspond to the two pushing parts 50 on the semicircular handle, two corresponding clamping plates 60 are arranged on the barrel 41.

[0184] A spacing gap 45 is provided between the two sides of the clamping plate 60 and the cylinder 41 along the circumferential direction. To avoid interference with the rotation of the pusher 50 around the pivot shaft 9, the spacing gap 45 has an opening at one end away from the base 100. The circumferential width of the opening gradually decreases as it extends toward the base 100. The clamping plate 60 can be fixedly connected to one end of the cylinder 41 away from the base 100. Preferably, the clamping plate 60 and the cylinder 41 are integrally formed.

[0185] In order to have better elastic reset ability and provide corresponding receiving surface 61. The thickness of at least part of the card plate 60 is greater than the wall thickness of the cylinder 41. Further, the card plate 60 is provided with a connecting portion close to the base 100 and a bearing portion away from the base 100. The width of the connecting portion along the circumferential direction is smaller than the width of the bearing portion along the circumferential direction. Among them, the receiving surface 61 and the blocking wall 62 are located at the upper end of the bearing portion.

[0186] In this embodiment, the filter element assembly replacement structure may also be provided with a guide structure. The guide structure is used to align the push portion 50 with the spacer portion 64 along the direction of the filter element assembly 200. By providing the guide structure, the user does not need to align the push portion 50 with the spacer portion 64 of the clamping plate 60 when installing the filter element assembly 200, which is convenient for the user to operate.

[0187] In order to facilitate the guidance of the filter element assembly 200, a guide protrusion 201 is provided on the side wall of the filter element assembly 200. The guide protrusion 201 is preferably a cylindrical protrusion, and other structures are of course not limited in this application. The number of guide protrusions 201 is preferably one

[0188] The guide structure includes a guide surface 42 provided on the inner wall of the cylinder 41 and a guide through hole 43 penetrating the cylinder wall of the cylinder 41. The guide surface 42 spirally extends from an end away from the base 100 to an end close to the base 100. The end of the guide surface 42 close to the base 100 passes through the guide through hole 43. The guide surface 42 is used to receive the guide protrusion 201 to guide the guide protrusion 201 into the guide through hole 43. The guide through hole 43 extends along the length direction of the filter element assembly 200.

[0189] The lower end of the guide surface 42 (the end close to the base 100) leads to the guide through hole 43. The guide through hole 43 has parts located on both sides of the guide surface 42. An observation hole may be provided on the cylinder 41 to observe whether the guide protrusion 201 is placed on the guide surface 42. When the guide protrusion 201 is placed on the guide surface 42, under the thrust of the user, the guide protrusion 201 will move along the guide surface 42 until it enters the guide channel. When the guide protrusion 201 enters the guide channel, the pushing portion 50 is aligned with the spacer portion 64. Continue to push the filter element assembly 200, and the pushing portion 50 will be inserted between the card plate 60 and the filter element assembly 200 until the locking mechanism locks the insertion end 1 of the filter element assembly 200, and the installation is completed.

[0190] To ensure that the filter element assembly 200 can continue to move toward the base 100 after the guide protrusion 201 enters the guide channel, the filter element assembly 200 is installed completely. Along the length direction of the filter element assembly 200, the distance between the receiving surface 61 and the lower end of the guide surface 42 (the end close to the base 100) is smaller than the distance between the pushing portion 50 and the guide protrusion 201 when the force bearing member 3 is in the second position.

[0191] The inner wall of the cylinder 41 is provided with at least one guide surface 42, and the spiral extension angle of the guide surface 42 is an integer multiple of 180 degrees. Fig.26 As shown, two guide surfaces 42 extending at an angle of 180 degrees are symmetrically arranged on the inner wall of the cylinder 41. In this way, the user does not need to pay attention to the position of the guide protrusion 201, and the user only needs to insert the filter element assembly 200 into the base 100, which is very convenient for the user to operate. Of course, in other embodiments, the guide surface 42 can also be a guide surface 42 extending at an angle of 360 degrees.

[0192] It should be noted that in the embodiment of the present application, the one far away from the base 100 can be regarded as the upper one, and the one close to the base 100 can be regarded as the lower one. Accordingly, moving toward the base 100 can also be regarded as moving downward. The “up and down” direction can be the same as the direction facing the reader. Fig.17 or Fig.19 The orientation shown corresponds to, but is not limited to, the actual placement state.

[0193] Of course, the embodiments of the present application are not limited to the above embodiments. In other embodiments, at least a portion of the receiving surface 61 can also be moved outside the receiving surface 61 to the side of the receiving surface 61 close to the base 100. In this embodiment, the push portion 50 can be allowed to squeeze the unlocking member 40 toward the filter element assembly 200 as it moves (which can also be understood as radial compression). Fig.25 In the opposite arrangement of the illustrated embodiment, in which the receiving surface 61 is located on the inner side of the blocking wall 62 , the inner diameter of the spacer 64 is smaller than that of the cut-in end 63 .

[0194] See also Figure 28 to Figure 31 In another embodiment, the force-bearing member 3 is provided with a pushing portion 50 for pushing the unlocking member 40. The pushing portion 50 has a switchable pushing position and a release position. When the pushing portion 50 is located at the release position, the force-bearing member 3 does not interfere with the unlocking member 40. When the pushing portion 50 is located at the release position, the pushing portion 50 can push the unlocking member 40 to open the locking mechanism.

[0195] Furthermore, the filter element assembly 200 can be inserted into the base 100 until it is locked by the locking mechanism when the force-bearing member 3 is located at any position between the first position and the second position. In this way, the user can install the filter element assembly 200 in place without paying attention to the position of the force-bearing member 3, which is convenient for the user to install.

[0196] Furthermore, when the push part 50 is in the release position, it does not rotate with the force receiving member 3. When the push part 50 is in the push position, it rotates with the force receiving member 3. When the force receiving member 3 is in the first position, the user can switch the push part 50 from the release position to the push position, and then apply force to move the push part 50 from the first position to the second position, thereby removing the filter element assembly 200 from the base 100.

[0197] In this embodiment, the pushing portion 50 switches between the pushing position and the releasing position by radial movement. The inner diameter of the pushing portion 50 at the releasing position is larger than the inner diameter at the pushing position. That is, the radial gap width between the pushing portion 50 and the filter element assembly 200 when the pushing portion 50 is at the releasing position is larger than the radial gap width between the pushing portion 50 and the filter element assembly 200 when the pushing portion 50 is at the pushing position. Thus, when the filter element assembly 200 is inserted into the base 100 and the pushing portion 50 is at the releasing position, whether the force-bearing member 3 is at the first position or the second position, or even at any position between the first position and the second position, it will not affect the insertion of the filter element assembly 200 into the base 100 until it is locked by the locking mechanism.

[0198] The pushing portion 50 is mounted at both ends of the handle. The pushing portion 50 is rotatably mounted on the pivot shaft 9. When the pushing portion 50 is in the pushing position, the force receiving member 3 can drive the pushing portion 50 to rotate around a rotation axis. The pushing portion 50 can move along the rotation axis to switch between the pushing position and the release position.

[0199] In a feasible embodiment, the pushing portion 50 has an inserting portion 54, and the handle has an inserted portion 55 (such as Fig.30 , Fig.31The inserted portion 55 may be provided with an insertion hole, and the insertion portion 54 may be an insertion protrusion that can be inserted into the insertion hole. When the pushing portion 50 is in the release position, the insertion portion 54 moves outward along the pivot axis 9 and moves out of the insertion hole of the inserted portion 55. In this way, the handle and the pushing portion 50 cannot be rotated in linkage, and the pushing portion 50 does not rotate with the handle. The pushing portion 50 is pushed radially inward, and the insertion portion 54 of the pushing portion 50 is inserted into the inserted portion 55. The handle and the pushing portion 50 are linked, and the handle can drive the pushing portion 50 to rotate. In this way, the handle is rotated from the first position to the second position, the locking mechanism is unlocked, and the filter element assembly 200 is removed.

[0200] In order to simplify the user operation, the filter element assembly replacement structure may also be provided with an elastic member 70 for applying an elastic force to the push portion 50 to move toward the release position. The elastic member 70 includes a spring sleeved on the pivot shaft 9. The elastic member 70 can ensure that the push portion 50 is in the release position when the filter element assembly 200 does not need to be unlocked, thereby avoiding mis-locking of the filter element assembly 200.

[0201] See also Figures 1 to 31 The present invention also provides a water purifier in an embodiment, including: a filter element assembly replacement structure as described in any of the above embodiments or implementations. Specifically, the water purifier may have multiple filter element assemblies 200. The base 100 of the filter element assembly replacement structure may form a water purifier housing, and of course, the support cylinder 300 may also be a part of the water purifier housing.

[0202] In other embodiments, the water purifier housing is provided with a plurality of bases 100, and the plurality of bases 100 may be an integrated structure, and each base 100 is correspondingly installed with a filter element assembly 200. The water purifier housing is provided with a plurality of receiving grooves; each receiving groove corresponds to an insertion hole 15 leading to a base 100. The plurality of filter element assemblies 200 may be installed in the receiving grooves one by one, and inserted into the corresponding base 100.

[0203] Any numerical value cited herein includes all values ​​of lower and upper values ​​that increase by one unit from the lower limit to the upper limit, and there is at least a two-unit interval between any lower value and any higher value. For example, if the value of the quantity of a component or a process variable (such as temperature, pressure, time, etc.) is stated to be from 1 to 90, preferably from 20 to 80, and more preferably from 30 to 70, the purpose is to illustrate that values ​​such as 15 to 85, 22 to 68, 43 to 51, 30 to 32 are also explicitly listed in this specification. For values ​​less than 1, one unit is appropriately considered to be 0.0001, 0.001, 0.01, 0.1. These are merely examples that are intended to be clearly expressed, and it can be considered that all possible combinations of numerical values ​​listed between the lowest value and the highest value are clearly stated in this specification in a similar manner.

[0204] Unless otherwise indicated, all ranges include the endpoints and all numbers between the endpoints. "About" or "approximately" used with a range applies to both endpoints of the range. Thus, "about 20 to 30" is intended to cover "about 20 to about 30", including at least the specified endpoints.

[0205] All articles and references disclosed, including patent applications and publications, are incorporated herein by reference for all purposes. The term "consisting essentially of..." to describe a combination should include the identified elements, ingredients, parts or steps and other elements, ingredients, parts or steps that do not substantially affect the basic novel characteristics of the combination. The use of the terms "comprising" or "including" to describe a combination of elements, ingredients, parts or steps herein also contemplates embodiments that consist essentially of these elements, ingredients, parts or steps. By using the term "may", it is intended to indicate that any attribute described that "may" include is optional.

[0206] Multiple elements, ingredients, parts or steps can be provided by a single integrated element, ingredient, part or step. Alternatively, a single integrated element, ingredient, part or step can be divided into separate multiple elements, ingredients, parts or steps. The disclosure "one" or "an" used to describe an element, ingredient, part or step is not intended to exclude other elements, ingredients, parts or steps.

[0207] It should be understood that the above description is for illustration and not for limitation. Many embodiments and many applications beyond the examples provided will be apparent to those skilled in the art upon reading the above description. Therefore, the scope of the present teachings should not be determined with reference to the above description, but should be determined with reference to the appended claims and the full scope of equivalents possessed by such claims. For the purpose of comprehensiveness, all articles and references, including disclosures of patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein in the preceding claims is not intended to be a waiver of the subject matter, nor should it be considered that the inventors did not consider the subject matter to be part of the disclosed inventive subject matter.

Claims

1. A filter element replacement structure, characterized in that: include: A filter element assembly, a base for mounting the filter element assembly, a locking mechanism for locking the filter element assembly on the base, and an unlocking member for opening the locking mechanism; wherein, The filter element assembly is provided with a force-bearing member for receiving force applied by a user; the force-bearing member has a first position and a second position through action; When the force-bearing member moves from the first position to the second position, it can push the unlocking member to open the locking mechanism; when the force-bearing member is in the second position, the filter element assembly can be inserted into the base until it is locked by the locking mechanism; The force-bearing member is provided with a pushing portion; the unlocking member is provided with a receiving surface matched with the pushing portion; when the pushing portion moves from the first position to the second position, it contacts with the receiving surface, thereby pushing the unlocking member to open the locking mechanism; When the force-bearing member is located at the second position, when the filter element assembly is inserted into the base, at least part of the pushing portion can move from one side of the receiving surface to the other side of the receiving surface; The filter element assembly has an insertion end for inserting into the base, and an operating end facing away from the insertion end; the base may be provided with an insertion hole for inserting the insertion end.

2. The filter element assembly replacement structure according to claim 1, characterized in that: When the force-bearing member is located at the second position, when the filter element assembly is inserted into the base, at least a portion of the pushing portion can extend between the unlocking member and the filter element assembly.

3. The filter element replacement structure according to claim 2, characterized in that: When the force-bearing member rotates from the second position to the first position, part of the pushing portion can be moved out from between the unlocking member and the filter element assembly.

4. The filter element assembly replacement structure according to claim 2 or 3, characterized in that: It also includes a cutting-in structure; the cutting-in structure is used to make the pushing part cut into and contact with the receiving surface when the force-bearing member rotates from the first position to the second position.

5. The filter element assembly replacement structure according to claim 4, characterized in that: The cutting structure comprises a blocking wall arranged at one end of the unlocking member away from the base; the receiving surface is located on the outside of the blocking wall; and one end of the blocking wall along the circumferential direction is a cutting end whose outer diameter does not exceed the inner diameter of the pushing portion.

6. The filter element assembly replacement structure according to claim 5, characterized in that: The blocking wall also has a spacing portion; at least a portion of the pushing portion can extend between the spacing portion and the filter element assembly; and the inner diameter of the cut-in end gradually increases as it extends toward the spacing portion.

7. The filter element assembly replacement structure according to claim 4, characterized in that: An elastic structure is provided at one end of the unlocking member away from the base; an end of the elastic structure close to the force-bearing member can elastically move in the radial direction; the receiving surface and the cutting structure are arranged at one end of the elastic structure close to the force-bearing member.

8. The filter element assembly replacement structure according to claim 7, characterized in that: The unlocking member comprises a cylinder body which is mounted on the base and can be sleeved outside the filter element assembly; the elastic structure comprises a clamping plate arranged on the cylinder body; and a spacing gap is arranged between the two sides of the clamping plate along the circumferential direction and the cylinder body.

9. The filter element assembly replacement structure according to claim 8, characterized in that: The clamping plate and the cylinder are integrally formed.

10. The filter element assembly replacement structure according to claim 8, characterized in that: The thickness of at least part of the clamping plate is greater than the wall thickness of the cylinder.

11. The filter element assembly replacement structure according to claim 8, characterized in that: The clamping plate is provided with a connecting portion close to the base and a bearing portion far away from the base; the width of the connecting portion along the circumferential direction is smaller than the width of the bearing portion along the circumferential direction.

12. The filter element assembly replacement structure according to any one of claims 8 to 11, characterized in that: The force-bearing member comprises a handle rotatably mounted on the filter element assembly; the handle gradually stands upright when rotating from a first position to a second position; The two ends of the handle are respectively provided with a pushing portion, and the cylinder body is provided with two corresponding clamping plates.

13. The filter element assembly replacement structure according to claim 4, characterized in that: The pushing portion includes a pushing surface arranged on the force-bearing member and rotating around a rotation axis; when the force-bearing member rotates from a first position to a second position, the distance between the contact portion between the pushing surface and the receiving surface and the rotation axis gradually increases.

14. The filter element assembly replacement structure according to claim 13, characterized in that: The radial thickness of at least a portion of the pushing portion gradually decreases in a direction away from the rotation axis.

15. The filter element assembly replacement structure according to claim 6, characterized in that: A guide structure is also provided; the guide structure is used to align the pushing portion and the spacing portion along the direction of the filter element assembly.

16. The filter element assembly replacement structure according to claim 15, characterized in that: The unlocking member comprises a cylinder mounted on the base and can be sleeved outside the filter element assembly; a guide protrusion is provided on the side wall of the filter element assembly; The guide structure includes a guide surface arranged on the inner wall of the cylinder and a guide through hole passing through the cylinder wall of the cylinder; the guide surface spirally extends from an end away from the base to an end close to the base; the end of the guide surface close to the base passes into the guide through hole; the guide surface is used to receive the guide protrusion to guide the guide protrusion into the guide through hole; the guide through hole extends along the length direction of the filter element assembly.

17. The filter element assembly replacement structure according to claim 16, characterized in that: Along the length direction of the filter element assembly, the distance between the receiving surface and the lower end of the guide surface is smaller than the distance between the pushing portion and the guide protrusion when the force-bearing member is in the second position.

18. The filter element assembly replacement structure according to claim 16, characterized in that: At least one guide surface is provided on the inner wall of the cylinder, and the spiral extension angle of the guide surface is an integer multiple of 180 degrees.

19. The filter element assembly replacement structure according to claim 1, characterized in that: The force-bearing member is provided with a pushing portion for pushing the unlocking member; the pushing portion has a switchable pushing position and a releasing position; when the pushing portion is located at the releasing position, the force-bearing member does not interfere with the unlocking member; when the pushing portion is located at the pushing position, the pushing portion can push the unlocking member to open the locking mechanism.

20. The filter element assembly replacement structure according to claim 19, characterized in that: The force-bearing member can drive the pushing portion to rotate around a rotation axis; the pushing portion can move along the rotation axis to switch between the pushing position and the releasing position.

21. The filter element assembly replacement structure according to claim 20, characterized in that: An elastic member is also provided for applying an elastic force to the pushing portion to move toward the release position.

22. A filter element replacement structure, characterized in that: include: A filter element assembly, a base for mounting the filter element assembly, a locking mechanism for locking the filter element assembly on the base, and an unlocking member for opening the locking mechanism; wherein, The filter element assembly is provided with a force-bearing member for receiving force applied by a user; the force-bearing member has a first position and a second position through action; When the force-bearing member moves from the first position to the second position, it can push the unlocking member to open the locking mechanism; when the force-bearing member is in the second position, the filter element assembly can be inserted into the base until it is locked by the locking mechanism; The force-bearing member is provided with a pushing portion for pushing the unlocking member; the pushing portion has a switchable pushing position and a releasing position; when the pushing portion is located at the releasing position, the force-bearing member does not interfere with the unlocking member, and the pushing portion can push the unlocking member to open the locking mechanism, and when the force-bearing member is located at any position between the first position and the second position, the filter element assembly can be inserted into the base until it is locked by the locking mechanism.

23. A water purifier, characterized in that: include: A filter element assembly replacement structure according to any one of claims 1 to 22.

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