Filter element self-locking device, filter element structure and water purification equipment

Abstract

The utility model discloses a filter element self-locking device, a filter element structure and water purification equipment, and relates to the technical field of water treatment.The filter element self-locking device comprises an end cover and at least one locking structure, and at least one side of the end cover is provided with an opening; the locking structure is arranged in the end cover, the locking structure comprises a clamping piece, a transmission assembly and a rotating piece, the rotating piece is arranged in the end cover in a circumferential rotation mode, and the rotating piece is connected with the clamping piece through the transmission assembly; the rotating piece is provided with a first position and a second position, and at the first position, the clamping piece retracts into the end cover; and at the second position, the clamping piece extends out of the opening and is clamped with the corresponding clamping groove. According to the technical scheme provided by the invention, the filter element self-locking device is unlocked and locked by changing the rotating position of the rotating part, so that the problem that the filter element pops up due to overhigh water pressure in the water purification equipment can be effectively avoided, and the safety and reliability of the water purification equipment are improved.

Description

Technical Field

[0001] The present application relates to the field of water treatment technology, and in particular to a filter element self-locking device, a filter element structure and a water purification device. Background Art

[0002] Water purifiers, as essential water filtration devices, are widely used in homes, offices, and commercial spaces. However, during use, they are subject to tap water pressure and increased pump pressure, which act on the filter element. The purifier is connected to a water source, which transmits pressure to the purifier. The water pressure from the purifier pushes the water through the filter unit. Under the influence of pressure, the water is filtered through each layer, resulting in clean water. However, the filter element also faces the risk of being ejected from the purifier due to water pressure, causing damage to the filter element and the purifier itself. Currently, a handle lock mechanism is commonly used to lock the filter element. When the filter element is installed in the chassis, the structural design uses a handle that unlocks when lifted and locks when laid flat. Controlling the handle's position controls the locking state of the chassis to the filter element. However, excessive water pressure may cause the handle to pop up, risking the filter element from popping out. Utility Model Content

[0003] The main purpose of this application is to propose a filter element self-locking device, a filter element and a water purification device, aiming to solve the problem that the existing filter element is easy to pop out under high water pressure.

[0004] To achieve the above objectives, the filter element self-locking device proposed in this application includes:

[0005] an end cover, wherein at least one side of the end cover is provided with an opening;

[0006] At least one locking structure is arranged in the end cover, and the locking structure includes a clamping member, a transmission assembly and a rotating member. The rotating member can be circumferentially rotatable and arranged in the end cover, and the rotating member is connected to the clamping member through the transmission assembly; the rotating member has a first position and a second position, in the first position, the clamping member is retracted into the end cover; in the second position, the clamping member extends out of the opening and is engaged with the card slot of the water purification equipment.

[0007] In one embodiment, the transmission assembly includes a limit member, a transmission hinge and an elastic member, the limit member is connected to the inner wall of the end cover, one end of the transmission hinge is rotatably connected to the rotating member, and the other end of the transmission hinge passes through the limit member and is connected to the clamping member; one end of the elastic member abuts against the clamping member, and the other end of the elastic member abuts against the limit member; in the first position, the elastic member is in a compressed state and the clamping member is retracted into the end cover; in the second position, the elastic member is in an extended state and the clamping member extends out of the opening.

[0008] In one embodiment, the transmission hinge includes a first connecting rod and a second connecting rod, one end of the first connecting rod is rotatably connected to the rotating member, the other end of the first connecting rod is rotatably connected to one end of the second connecting rod, and the end of the second connecting rod away from the first connecting rod is connected to the clamping member; in the first position, the first connecting rod and the second connecting rod form an angle; in the second position, the first connecting rod and the second connecting rod are on the same extension line.

[0009] In one embodiment, the limiting member is provided with a limiting groove, the second connecting rod passes through the limiting groove, and the second connecting rod can move along the length direction of the limiting groove; and / or,

[0010] The elastic member includes a spring, and the spring is sleeved on the second connecting rod.

[0011] In one embodiment, the filter element self-locking device further comprises a handle, which is rotatably disposed on the end cover; the handle is connected to the rotating member; and / or,

[0012] The rotating member is provided with a connecting column, and the connecting column is rotatably connected to an end of the first connecting rod away from the second connecting rod.

[0013] In one embodiment, a plug hole is provided on a side of the handle facing the end cover, and the connecting post is inserted into the plug hole; and / or,

[0014] The end cover includes a base and a cover body, the base and the cover body are connected, and an installation cavity is formed between the base and the cover body, and the clamping member and the transmission hinge are both arranged in the installation cavity; the rotating member can be circumferentially rotatable on the base, and the limiting member is fixedly connected to the base; the opening is arranged on one side of the cover body.

[0015] In one embodiment, a mounting groove is provided on a side of the base away from the cover body, a first guide through hole is provided on the groove wall of the mounting groove, and a second guide through hole is provided on the cover body, and the shapes and setting positions of the first guide through hole and the second guide through hole correspond to each other; the rotating part is located in the mounting groove, the connecting column passes through the first guide through hole and the second guide through hole, and the connecting column can move along the first guide through hole and the second guide through hole; in the first position, the connecting column is located at the end of the first guide through hole and the second guide through hole farther from the opening; in the second position, the connecting column is located at the end of the first guide through hole and the second guide through hole closer to the opening.

[0016] In one embodiment, the first guide through hole and the second guide through hole are both configured as arc-shaped elongated holes, and the arc-shaped elongated holes are configured to extend along the circumference of the rotating member; and / or,

[0017] Openings are respectively provided on opposite sides of the end cover, and the filter element self-locking device includes two sets of locking structures, and the setting positions of the locking structures correspond to the setting positions of the openings.

[0018] The present application also proposes a filter element structure, comprising the filter element self-locking device as described above, wherein the filter element structure further comprises a filter element body, and the filter element body is connected to the end cover.

[0019] The present application also proposes a water purification device, comprising the filter element structure as described above.

[0020] The technical solution of the present application is to provide an opening on at least one side of the end cap and a locking structure corresponding to the opening, wherein the locking structure is provided in the end cap, wherein the locking structure includes a clamping member, a transmission assembly and a rotating member, wherein the rotating member is rotatable and provided in the end cap, and the rotating member is connected to the clamping member through the transmission assembly; the rotating member has a first position and a second position, when the rotating member rotates to the first position, the rotating member drives the transmission assembly, and the transmission assembly drives the clamping member to retract into the end cap, at which time the filter element self-locking device is in an unlocked state, and the filter element can be installed in or removed from the water purification device; when the rotating member rotates to the second position, the rotating member drives the transmission assembly, and then the transmission assembly drives the clamping member to extend out of the opening and engage with the card slot of the water purification device, and the filter element self-locking device is in a locked state, which can lock the filter element to the water purification device. The filter element self-locking device realizes the opening and locking of the filter element self-locking device by changing the rotational position of the rotating member, which can effectively avoid the problem of the filter element popping out due to excessive water pressure in the water purification device, thereby improving the safety and reliability of the water purification device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0022] Figure 1 This is a structural schematic diagram of an embodiment of the filter element self-locking device provided by the present application in the second position;

[0023] Figure 2 for Figure 1 A partial enlarged view of point A in the middle;

[0024] Figure 3This is a schematic structural diagram of an embodiment of the filter element self-locking device provided by the present application in the first position;

[0025] Figure 4 for Figure 3 A partial enlarged view of point B in the middle;

[0026] Figure 5 This is a schematic cross-sectional view of an embodiment of the filter element self-locking device provided in this application;

[0027] Figure 6 A schematic cross-sectional view of an embodiment of a filter element structure provided in this application;

[0028] Figure 7 This is a schematic diagram of the exploded structure of an embodiment of the filter element structure provided in this application.

[0029] Description of Figure Numbers:

[0030] 1. End cap; 11. Opening; 12. Base; 121. First guide hole; 122. Avoidance groove; 13. Cover body; 131. Second guide hole; 2. Locking structure; 21. Clamp; 22. Transmission assembly; 221. Transmission hinge; 2211. First connecting rod; 2212. Second connecting rod; 222. Elastic member; 223. Limiting member; 2231. Limiting groove; 23. Rotating member; 231. Connecting column; 3. Handle; 31. Plug hole; 4. Filter element.

[0031] The realization of the objectives, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0032] The following will be combined with the accompanying drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of this application.

[0033] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), such directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0034] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement it. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0035] Water purifiers, as essential water filtration devices, are widely used in homes, offices, and commercial spaces. However, during use, they are subject to tap water pressure and increased pump pressure, which act on the filter element. The purifier is connected to a water source, which transmits pressure to the purifier. The water pressure from the purifier pushes the water through the filter unit. Under the influence of pressure, the water is filtered through each layer, resulting in clean water. However, the filter element also faces the risk of being ejected from the purifier due to water pressure, causing damage to the filter element and the purifier itself. Currently, a handle lock mechanism is commonly used to lock the filter element. When the filter element is installed in the chassis, the structural design uses a handle that unlocks when lifted and locks when laid flat. Controlling the handle's position controls the locking state of the chassis to the filter element. However, excessive water pressure may cause the handle to pop up, risking the filter element from popping out.

[0036] In order to solve the above problems, the present application proposes a filter element self-locking device.

[0037] See also Figures 1 to 5 In one embodiment of the present application, the filter element self-locking device includes an end cover 1 and at least one locking structure 2, and the end cover 1 is provided with an opening 11 on at least one side; the locking structure 2 is arranged in the end cover 1, and the locking structure 2 includes a clamping member 21, a transmission assembly 22 and a rotating member 23, and the rotating member 23 can be circumferentially rotatable and arranged in the end cover 1. The rotating member 23 is connected to the clamping member 21 through the transmission assembly 22; the rotating member 23 has a first position and a second position. In the first position, the clamping member 21 is retracted into the end cover 1; in the second position, the clamping member 21 extends out of the opening 11 and is engaged with the corresponding slot.

[0038] In the above structure, an opening 11 is provided on at least one side of the end cover 1, and a locking structure 2 corresponding to the opening 11 is provided, so that the locking structure 2 is provided in the end cover 1, wherein the locking structure 2 includes a clamping member 21, a transmission assembly 22 and a rotating member 23, and the rotating member 23 can be circumferentially rotatable in the end cover 1, and the rotating member 23 is connected to the clamping member 21 through the transmission assembly 22; the rotating member 23 has a first position and a second position. When the rotating member 23 rotates to the first position, the transmission assembly 22 is driven by the rotating member 23, and the transmission assembly 22 drives the clamping member 21 to retract into the end cover 1. At this time, the filter element self-locking device is in an unlocked state, and the filter element 4 can be installed in the water purification equipment or taken out from the water purification equipment; when the rotating member 23 rotates to the second position, the transmission assembly 22 is driven by the rotating member 23, and the transmission assembly 22 is used to drive the clamping member 21 to extend out of the opening 11 and engage with the card slot of the water purification equipment. This filter element self-locking device is in a locked state, which can lock the filter element 4 with the water purification equipment. The filter element self-locking device opens and locks the filter element self-locking device by changing the rotation position of the rotating part 23, which can effectively avoid the problem of the filter element 4 being ejected due to excessive water pressure in the water purification equipment, thereby improving the safety and reliability of the water purification equipment.

[0039] It should be noted that the end cover 1 is connected to the body of the filter element 4, and the filter element 4 is used to be installed in the installation space of the water purification equipment, wherein a card slot is provided in the installation space of the water purification equipment. By utilizing the extension and retraction of the card 21, the opening and locking of the filter element self-locking device is realized, thereby realizing the locking and disassembly of the filter element 4 and the water purification equipment.

[0040] In one embodiment, the transmission assembly 22 includes a limit member 223, a transmission hinge 221 and an elastic member 222, the limit member 223 is connected to the inner wall of the end cover 1, one end of the transmission hinge 221 is rotatably connected to the rotating member 23, and the other end of the transmission hinge 221 passes through the limit member 223 and is connected to the clamping member 21; one end of the elastic member 222 abuts against the clamping member 21, and the other end of the elastic member 222 abuts against the limit member 223; in the first position, the elastic member 222 is in a compressed state and the clamping member 21 is retracted into the end cover 1; in the second position, the elastic member 222 is in an extended state and the clamping member 21 extends out of the opening 11. In the above structure, when an external force is applied to rotate the rotating member 23 to the first position, the rotating member 23 pulls the transmission hinge 221, thereby causing the clamping member 21 to retract into the end cap 1. At this time, the filter cartridge 4 can be installed in or removed from the water purification device. Because one end of the elastic member 222 abuts the clamping member 21 and the other end of the elastic member 222 abuts the limiter 223, the elastic member 222 is in a compressed state. When the external force is removed from the rotating member 23, the elastic member 222 provides elastic force to rotate the rotating member 23 to the second position, and the elastic member 222 extends (returns from the compressed state to the initial state). At this time, the clamping member 21 extends out of the opening 11 and engages with the slot on the water purification device, achieving a locked state, ensuring the stability and safety of the filter cartridge 4 during use. The cooperation of the limiter 223, the transmission hinge 221, and the elastic member 222 realizes the automatic extension and retraction function of the clamping member 21, which not only simplifies the installation and removal process of the filter cartridge 4 but also improves the safety of use.

[0041] In one embodiment, the transmission hinge 221 includes a first connecting rod 2211 and a second connecting rod 2212, one end of the first connecting rod 2211 is rotatably connected to the rotating member 23, the other end of the first connecting rod 2211 is rotatably connected to one end of the second connecting rod 2212, and the end of the second connecting rod 2212 away from the first connecting rod 2211 is connected to the clamping member 21; in the first position, the first connecting rod 2211 and the second connecting rod 2212 form an angle; in the second position, the first connecting rod 2211 and the second connecting rod 2212 are on the same extension line. When the rotating member 23 rotates to the first position, relative rotation occurs between the rotating member 23, the first connecting rod 2211 and the second connecting rod 2212. At this time, the first connecting rod 2211 and the second connecting rod 2212 form an angle, and the elastic member 222 is in a compressed state, and the clamping member 21 shrinks into the end cover 1; when the rotating member 23 rotates to the second position, the first connecting rod 2211 and the second connecting rod 2212 are on the same extension line. At this time, the elastic member 222 is in an extended state, and the clamping member 21 extends out of the opening 11 and is engaged with the clamping slot on the water purification equipment. The rotating member 23 is hinged to the first connecting rod 2211, and the hinge of the first connecting rod 2211 and the second connecting rod 2212 can achieve more flexible rotation and movement, so that the transmission hinge 221 can effectively transmit force at different angles and positions; when external force is applied to the rotating member 23, the rotation and movement of the first connecting rod 2211 and the second connecting rod 2212 can drive the clamping member 21 to be extended and retracted, and the first connecting rod 2211 and the second connecting rod 2212 can be compactly folded or unfolded, that is, when the first connecting rod 2211 and the second connecting rod 2212 form an angle, it is in a folded state, and the clamping member 21 is retracted into the end cover 1; when the first connecting rod 2211 and the second connecting rod 2212 are on the same extension line, it is in an unfolded state, and the clamping member 21 extends out of the opening 11 and is engaged with the card slot; the transmission hinge 221 has the advantages of compact structure and high movement flexibility.

[0042] In one embodiment, the limiting member 223 is provided with a limiting slot 2231, through which the second connecting rod 2212 passes. The second connecting rod 2212 can move along the length of the limiting slot 2231. The limiting slot 2231 provides guidance and restraint for the second connecting rod 2212, ensuring that it moves along a predetermined path, thereby achieving precise control of the clamping member 21. The movement of the second connecting rod 2212 along the limiting slot 2231 can reduce jitter and deviation during movement, making the transmission more stable and reliable.

[0043] In one embodiment, the elastic member 222 comprises a spring, which is mounted on the second connecting rod 2212. Mounting the spring directly on the second connecting rod 2212 saves space and makes the entire transmission hinge 221 more compact. The spring also provides uniform force along the entire length of the second connecting rod 2212, helping to reduce localized stress concentration. Because the spring requires no additional fixing or connecting elements and can be mounted directly on the second connecting rod 2212, it simplifies the assembly process and facilitates spring replacement. The spring also absorbs vibration and impact during movement, ensuring smoother extension and retraction of the clip 21. Furthermore, the spring's elasticity allows the second connecting rod 2212 to automatically return to its initial position upon release of external force, thereby achieving a self-resetting function for the clip 21.

[0044] In one embodiment, the filter cartridge self-locking device further includes a handle 3 rotatably disposed on the end cap 1 ; the handle 3 is connected to the rotating member 23 . Through the connection between the handle 3 and the rotating member 23 , the user can directly control the locking and release of the filter cartridge 4 through the handle 3 ; the handle 3 provides a portion that is convenient for the user to grasp and operate, making the rotation of the rotating member 23 easier and more labor-saving, while also facilitating the installation and removal of the filter cartridge 4 .

[0045] In one embodiment, the rotating member 23 is provided with a connecting post 231, which is rotatably connected to the end of the first connecting rod 2211 away from the second connecting rod 2212. The rotatable connection between the connecting post 231 and the first connecting rod 2211 ensures flexible motion transmission between the rotating member 23 and the transmission hinge 221, reducing friction and wear during motion. The connection between the rotating member 23 and the first connecting rod 2211 via the connecting post 231 improves the stability of motion transmission and reduces the risk of failure caused by an unstable connection.

[0046] In one embodiment, the handle 3 is provided with an insertion hole 31 on the side facing the end cap 1, and the connecting post 231 is inserted into the insertion hole 31. By inserting the connecting post 231 into the insertion hole 31 of the handle 3, the installation and removal of the handle 3 becomes simple and quick, and the rotating member 23 and the handle 3 form a stable connection point, ensuring that the handle 3 will not accidentally fall off during operation.

[0047] In one embodiment, the end cap 1 includes a base 12 and a cover 13. The base 12 and cover 13 are connected to form a mounting cavity between the two bodies. The latch 21 and the transmission hinge 221 are both located within the mounting cavity. A rotating member 23 is rotatably mounted on the base 12, and a stopper 223 is fixedly connected to the base 12. An opening 11 is provided on one side of the cover 13. The mounting cavity formed by the base 12 and cover 13 protects the latch 21 and transmission hinge 221 within the cavity, preventing the intrusion of dust, moisture, and other contaminants, thereby improving the durability and reliability of the device. By designing the base 12 and cover 13 as two separate components, the manufacturing process is simplified and subsequent assembly and disassembly are facilitated. Furthermore, the fixed connection of the stopper 223 to the base 12 ensures that the stopper function remains stable and reliable during operation of the filter element self-locking device. It should be noted that the side of the base 12 facing away from the cover 13 is connected to the filter element 4.

[0048] In one embodiment, a side of the base 12 facing the cover body 13 is further provided with an avoidance groove 122, which is used to provide an avoidance space for the elastic member 222; by providing the avoidance groove 122 on the base 12, the space can be effectively utilized so that the elastic member 222 can be properly placed, thereby making the entire structure more compact.

[0049] In one embodiment, a mounting groove is provided on a side of the base 12 away from the cover 13. A first guide hole 121 is provided in the groove wall of the mounting groove, and a second guide hole 131 is provided in the cover 13. The shapes and positions of the first and second guide holes 121, 131 correspond to each other. The rotating member 23 is positioned within the mounting groove, and a connecting post 231 passes through the first and second guide holes 121, 131. The connecting post 231 can move along the first and second guide holes 121, 131. In a first position, the connecting post 231 is located at the end of the first and second guide holes 121, 131 that is farther from the opening 11. In a second position, the connecting post 231 is located at the end of the first and second guide holes 121, 131 that is closer to the opening 11. The shapes and positions of the first and second guide holes 121, 131 correspond to each other, providing guidance for the connecting post 231, ensuring that it maintains the correct direction and position during movement. The connecting post 231 can move along the first guide hole 121 and the second guide hole 131, allowing the rotating member 23 to flexibly switch between the first position and the second position to achieve the function of locking and releasing the filter element 4. The movement of the connecting post 231 between the first guide hole 121 and the second guide hole 131 can be controlled by the user using the handle 3 or other operating components, making the locking and releasing operations of the filter element 4 more convenient.

[0050] In one embodiment, the first guide hole 121 and the second guide hole 131 are both configured as arc-shaped elongated holes, extending along the circumference of the rotating member 23. The arc-shaped elongated holes serve as guides for the movement of the rotating member 23, ensuring smooth and precise circumferential rotation of the rotating member 23, and ensuring smoother movement of the rotating member 23 and reducing sticking.

[0051] In one embodiment, openings 11 are provided on opposite sides of the end cap 1, and the self-locking assembly of the filter element 4 includes two sets of locking structures 2, and the setting positions of the locking structures 2 correspond to the setting positions of the openings 11. By providing openings 11 on both sides of the end cap 1 and configuring the locking structures 2 accordingly, bidirectional locking of the filter element 4 can be achieved, thereby improving the stability and safety of the installation of the filter element 4; and the locking structures 2 on both sides provide double protection, even if a problem occurs on one side, the other side can still maintain the locked state of the filter element 4, thereby improving the reliability of the entire system. In another embodiment, the self-locking assembly of the filter element 4 can also include multiple sets of locking structures 2, and the end cap 1 is provided with multiple openings 11 corresponding to the locking structures 2. The locking structures 2 are evenly distributed on the filter element 4, so that the locking force is more evenly distributed, avoiding local stress concentration.

[0052] The technical solution of the present application is to provide an opening 11 on at least one side of the end cover 1 and a locking structure 2 corresponding to the opening 11, and to provide the locking structure 2 in the end cover 1, wherein the locking structure 2 includes a clamping member 21, a transmission assembly 22 and a rotating member 23, and the rotating member 23 can be circumferentially rotatable in the end cover 1, and the rotating member 23 is connected to the clamping member 21 through the transmission assembly 22; the rotating member 23 has a first position and a second position. When the rotating member 23 rotates to the first position, the transmission assembly 22 is driven by the rotating member 23, and the transmission assembly 22 drives the clamping member 21 to retract into the end cover 1. At this time, the filter element self-locking device is in an unlocked state, and the filter element 4 can be installed in the water purification equipment or taken out from the water purification equipment; when the rotating member 23 rotates to the second position, the transmission assembly 22 is driven by the rotating member 23, and the transmission assembly 22 is used to drive the clamping member 21 to extend out of the opening 11 and engage with the card slot of the water purification equipment. This filter element self-locking device is in a locked state, which can lock the filter element 4 to the water purification equipment. The filter element self-locking device opens and locks the filter element self-locking device by changing the rotation position of the rotating part 23, which can effectively avoid the problem of the filter element 4 being ejected due to excessive water pressure in the water purification equipment, thereby improving the safety and reliability of the water purification equipment.

[0053] This application also proposes a filter element 4, referring to Figures 1 to 7The filter element structure includes a filter element self-locking device. The specific structure of the filter element self-locking device is referred to the above embodiment. Since the filter element 4 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described in detail here. The filter element structure also includes a filter element body, which is connected to the end cap.

[0054] The present application also proposes a water purification device, which includes a filter element 4. The specific structure of the filter element 4 refers to the above embodiment. Since the water purification device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0055] The above description is merely an exemplary embodiment of the present application and does not limit the patent scope of the present application. Any equivalent structural transformation made using the contents of the present application specification and drawings under the technical concept of the present application, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present application.

Claims

1. A filter element self-locking device, characterized in that: include: an end cover, wherein at least one side of the end cover is provided with an opening; At least one locking structure is arranged in the end cover, and the locking structure includes a clamping member, a transmission assembly and a rotating member. The rotating member can be circumferentially rotatable and arranged in the end cover, and the rotating member is connected to the clamping member through the transmission assembly; the rotating member has a first position and a second position, in the first position, the clamping member is retracted into the end cover; in the second position, the clamping member extends out of the opening and is engaged with the card slot of the water purification equipment.

2. The filter element self-locking device according to claim 1, characterized in that: The transmission assembly includes a limit member, a transmission hinge and an elastic member, the limit member is connected to the inner wall of the end cover, one end of the transmission hinge is rotatably connected to the rotating member, and the other end of the transmission hinge passes through the limit member and is connected to the clamping member; one end of the elastic member abuts against the clamping member, and the other end of the elastic member abuts against the limit member; in the first position, the elastic member is in a compressed state and the clamping member is retracted into the end cover; in the second position, the elastic member is in an extended state and the clamping member extends out of the opening.

3. The filter element self-locking device according to claim 2, characterized in that: The transmission hinge includes a first connecting rod and a second connecting rod, one end of the first connecting rod is rotatably connected to the rotating member, the other end of the first connecting rod is rotatably connected to one end of the second connecting rod, and the end of the second connecting rod away from the first connecting rod is connected to the clamping member; in the first position, the first connecting rod and the second connecting rod form an angle; in the second position, the first connecting rod and the second connecting rod are on the same extension line.

4. The filter element self-locking device according to claim 3, characterized in that: The limiting member is provided with a limiting groove, the second connecting rod passes through the limiting groove, and the second connecting rod can move along the length direction of the limiting groove; and / or, The elastic member includes a spring, and the spring is sleeved on the second connecting rod.

5. The filter element self-locking device according to claim 3, characterized in that: The filter element self-locking device further comprises a handle, which is rotatably arranged on the end cover; the handle is connected to the rotating member; and / or, The rotating member is provided with a connecting column, and the connecting column is rotatably connected to an end of the first connecting rod away from the second connecting rod.

6. The filter element self-locking device according to claim 5, characterized in that: The handle is provided with a plug hole on one side facing the end cover, and the connecting post is inserted into the plug hole; and / or, The end cover includes a base and a cover body, the base and the cover body are connected, and an installation cavity is formed between the base and the cover body, and the clamping member and the transmission hinge are both arranged in the installation cavity; the rotating member can be circumferentially rotatable on the base, and the limiting member is fixedly connected to the base; the opening is arranged on one side of the cover body.

7. The filter element self-locking device according to claim 6, characterized in that: A mounting groove is provided on a side of the base away from the cover body, a first guide through hole is provided on the groove wall of the mounting groove, and a second guide through hole is provided on the cover body, and the shapes and setting positions of the first guide through hole and the second guide through hole correspond to each other; the rotating part is located in the mounting groove, the connecting column passes through the first guide through hole and the second guide through hole, and the connecting column can move along the first guide through hole and the second guide through hole; in the first position, the connecting column is located at the end of the first guide through hole and the second guide through hole farther from the opening; in the second position, the connecting column is located at the end of the first guide through hole and the second guide through hole closer to the opening.

8. The filter element self-locking device according to claim 7, characterized in that: The first guide through hole and the second guide through hole are both configured as arc-shaped elongated holes, and the arc-shaped elongated holes are configured to extend along the circumference of the rotating member; and / or, Openings are respectively provided on opposite sides of the end cover, and the filter element self-locking device includes two sets of locking structures, and the setting positions of the locking structures correspond to the setting positions of the openings.

9. A filter element structure, characterized in that: It comprises the filter element self-locking device according to any one of claims 1 to 8, wherein the filter element structure further comprises a filter element body, and the filter element body is connected to the end cover.

10. A water purification device, characterized in that: Comprising the filter element structure as claimed in claim 9.

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