A filter core quick-release type top spray structure

Abstract

The application discloses a filter core quick-release type top-spraying structure and belongs to the field of bathroom. The filter core quick-release type top-spraying structure comprises a shower body, a fixing ring, an upper cover, a water inlet assembly and a filter core. The shower body is provided with a water outlet hole and a cavity in communication with the water outlet hole, the cavity is used for placing the filter core and is provided with an opening. The fixing ring is fixedly arranged at the opening of the shower body. The upper cover is rotatably connected with the shower body and is used for pressing the filter core in the cavity, and the upper cover can rotate between an open position and a closed position. The water inlet assembly is connected with the upper cover and is used for conveying water flow to the cavity. The fixing ring is movably provided with a button, the button is provided with a first step, the upper cover is provided with a second step matched with the first step, the upper cover opens the cavity when being rotated to the open position, the upper cover is sealingly matched with the fixing ring and closes the cavity when being rotated to the closed position, and the button can be moved to the side where the first step is away from the fixing ring to limit the rotation of the upper cover.

Description

Technical Field

[0001] This application relates to the field of bathroom fixtures, and in particular to a quick-release top spray structure with a filter cartridge. Background Technology

[0002] In existing technology, conventional overhead showerheads typically employ an open-spray design, generally lacking the ability to filter large particles of impurities in the water. Although some products achieve basic filtration through built-in filters, the filter assembly of most overhead showerheads currently uses a threaded connection to the showerhead body, resulting in inconvenient filter replacement.

[0003] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] This application provides a quick-release top spray structure for filter cartridges, which can solve the problem of how to improve the convenience of filter cartridge replacement in the prior art.

[0006] (II) Technical Solution

[0007] To address the aforementioned technical problems, this application provides the following technical solutions:

[0008] On one hand, a quick-release top-spray structure for filter cartridges is provided, the quick-release top-spray structure for filter cartridges comprising:

[0009] The shower head body is provided with a water outlet and a cavity communicating with the water outlet. The cavity is used to hold the filter element and is provided with an opening.

[0010] A retaining ring is fixedly installed at the opening of the shower head body;

[0011] The top cover is rotatably connected to the shower head body and is used to press the filter element in the cavity. The top cover can rotate between an open position and a closed position.

[0012] A water inlet assembly, connected to the upper cover, is used to deliver water into the cavity;

[0013] The fixing ring is movably provided with a button, the button is provided with a first step, and the upper cover is provided with a second step adapted to the first step; when the upper cover is rotated to the open position, the upper cover opens the cavity; when the upper cover is rotated to the closed position, it seals with the fixing ring and closes the cavity, and the button is movable so that the first step is located on the side of the second step away from the fixing ring, so as to restrict the rotation of the upper cover.

[0014] In some embodiments, the fixing ring is provided with two spaced-apart fixing walls, and the button is rotatably connected between the two fixing walls by a first pin; a spring is provided between the button and the fixing ring, and the spring pushes the button so that when the first step is located on the side of the second step away from the fixing ring, it abuts against the upper end of the second step.

[0015] In some embodiments, the retaining ring is provided with a guide hole or guide shaft for the spring, and the spring is coaxially sleeved with the guide hole or guide shaft.

[0016] In some embodiments, the retaining ring is rotatably provided with a buckle via the first pin, and the upper cover is provided with a boss adapted to the buckle. When the upper cover is rotated to the closed position, the buckle can rotate to engage with the boss, so that the upper cover and the retaining ring fit together.

[0017] In some embodiments, the fastener is U-shaped and has a first pin hole and a guide groove communicating with the first pin hole at both ends. The first pin hole is a blind hole. The two ends of the first pin are rotatably disposed in the first pin holes at both ends of the fastener. The guide groove is used to guide the end of the first pin into the first pin hole.

[0018] In some embodiments, the shower head body is provided with a second pin, and the upper cover is provided with a second pin hole adapted to the second pin and a flared mouth communicating with the second pin hole. The small-diameter end of the flared mouth is communicating with the second pin hole, and the diameter of the communicating part is smaller than the outer diameter of the second pin.

[0019] In some embodiments, the fixing ring is provided with a snap-fit ​​protrusion, and the shower body is provided with a snap-fit ​​groove on the inner side of the cavity that is adapted to the snap-fit ​​protrusion; the fixing ring abuts against the opening of the shower body through a shoulder structure, and the snap-fit ​​protrusion and the snap-fit ​​groove are engaged to fix the fixing ring and the shower body relative to each other.

[0020] In some embodiments, the water inlet assembly includes a ball head and a ball head seat. The upper cover is provided with at least two slots of different diameters. The ball head seat is provided with ribs adapted to the diameter of each slot. The ball head seat is disposed inside the upper cover, and each rib is disposed in a slot with a corresponding diameter. The ball head is rotatably disposed on the ball head seat, and a washer is provided between the ball head and the ball head seat. The ball head and the ball head seat are provided with interconnected channels that communicate with a cavity.

[0021] In some embodiments, the filter element includes a filter element housing and a connector. The filter element housing is hollow inside and is provided with filter media. The connector is connected to the filter element housing by threads or snaps and covers the bottom of the filter element housing. The filter element housing is provided with a water inlet hole communicating with the interior. The connector is provided with a water outlet hole communicating with the interior of the filter element housing. The ball head seat is inserted into the water inlet hole.

[0022] In some embodiments, the filter cartridge housing is provided with a snap-fit ​​rib and a locking buckle at the end of the water inlet hole, and the ball head seat is provided with a snap-fit ​​groove, a locking groove and an anti-rotation rib; when the ball head seat is inserted into the water inlet hole, the snap-fit ​​rib connects with the snap-fit ​​groove, and when the filter cartridge rotates circumferentially, the locking buckle matches the locking groove, and the anti-rotation rib blocks the locking buckle to limit the rotation range of the locking buckle.

[0023] (III) Beneficial Effects

[0024] Compared with the prior art, the beneficial effects of the technical solution provided in this application include at least the following:

[0025] The showerhead body has water outlets and a connected chamber for holding the filter cartridge, which has an opening. After placing the filter cartridge in the chamber, rotate the top cover from the open position to the closed position. During rotation, the top cover gradually approaches the filter cartridge in the chamber. When rotated to the closed position, the top cover seals against the retaining ring, simultaneously pressing the filter cartridge firmly into place. This ensures the filter cartridge remains in a fixed position during use and will not move due to water flow, guaranteeing filtration effectiveness. At this point, the button can be moved so that the first step is located on the side of the second step away from the retaining ring. The first step abuts against the second step, thus limiting further rotation of the top cover and ensuring it remains stably closed, maintaining pressure on the filter cartridge and a seal with the retaining ring. When the water supply is turned on, water flows through the inlet assembly into the chamber. The water is filtered by the filter cartridge in the chamber, and the filtered clean water sprays out from the water outlets of the showerhead body, providing a shower function. When the filter cartridge needs to be replaced, operate the button to release the restriction of the first step on the second step. At this time, the top cover can be rotated from the closed position to the open position under external force. After the top cover is rotated to the open position, the cavity is opened, and the used filter cartridge can be easily removed from the cavity and replaced with a new filter cartridge.

[0026] As can be seen, the quick-release top spray structure of this application abandons the traditional threaded connection method and adopts a rotatable connection between the top cover and the shower body. When replacing the filter element, there is no need to repeatedly rotate the filter element assembly to disassemble and install it as with a threaded connection. Simply rotate the top cover to switch between the open and closed positions to quickly open or close the chamber, greatly facilitating the removal and placement of the filter element. A button is also provided, with its first step matching the second step on the top cover. When the top cover is rotated to the closed position, the button's movement positions the first step on the side of the second step away from the fixing ring, restricting the rotation of the top cover and ensuring stable closure, thus reliably pressing the filter element. When it is necessary to open the top cover, simply operate the button to release the restriction, and the top cover can be freely rotated open. This limiting and unlocking method is simple to operate, requiring no complicated tools or cumbersome steps, further improving the convenience of filter element replacement. Equally important, the layout of each component is compact and reasonable, with the fixing ring fixed at the opening of the shower body, providing a stable support structure for the rotation of the top cover and the placement of the filter element. The water inlet assembly is connected to the top cover without affecting the rotation of the top cover or the replacement of the filter element. This allows the entire top shower structure to ensure normal showering function while enabling convenient and quick filter element replacement, effectively solving the problem of inconvenient filter element replacement caused by traditional threaded connection methods. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a perspective view of the quick-release top spray structure of the filter element in the closed position in the embodiment of this application;

[0029] Figure 2 This is an exploded view of the quick-release top spray structure of the filter element in the embodiments of this application;

[0030] Figure 3 This is a sectional perspective view of the quick-release top spray structure of the filter element in the closed position in the embodiment of this application;

[0031] Figure 4 yes Figure 3 An enlarged view of the area within the dashed circle;

[0032] Figure 5 This is a perspective view of the quick-release top spray structure of the filter element in the open position in the embodiment of this application;

[0033] Figure 6This is a cross-sectional perspective view of the quick-release top spray structure of the filter element in the open position in the embodiment of this application;

[0034] Figure 7 A perspective view of the fixing ring in the embodiments of this application;

[0035] Figure 8 This is a perspective view of the upper cover in the embodiment of this application;

[0036] Figure 9 This is a perspective view of the fastener in the embodiments of this application;

[0037] Figure 10 This is a perspective view of the shower head body in the embodiment of this application;

[0038] Figure 11 This is a perspective view of the filter element in the embodiments of this application.

[0039] Figure label:

[0040] Shower head body 1, water outlet 11, cavity 12, opening 13, snap-fit ​​groove 14, second pin 15;

[0041] 2. Fixing ring, 21. Button, 211. First step, 22. Fixing wall, 23. First pin, 24. Spring, 25. Guide hole, 26. Shoulder structure, 27. Buckle, 27. First pin hole, 271. Guide groove, 272. Buckle protrusion, 28.

[0042] 3. Top cover; 31. Second step; 32. Boss; 33. Second pin hole; 34. Flared mouth; 35. Slot;

[0043] Water inlet assembly 4, ball head 41, ball head seat 42, rib 421, snap groove 422, locking groove 423, anti-rotation rib 424, washer 43, channel 44;

[0044] Filter element 5, filter element housing 51, filter media 511, water inlet 512, snap rib 513, locking buckle 514, connector 52, water passage hole 521.

[0045] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0047] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0048] The existing quick-release top spray structure for filter cartridges has the problem that it is not convenient to disassemble and replace the filter cartridges.

[0049] To address the aforementioned technical issues, this embodiment provides a quick-release top spray structure for the filter element.

[0050] Figure 1 This is a perspective view of the quick-release top spray structure of the filter element in the closed position in the embodiment of this application. Figure 2 This is an exploded view of the quick-release top spray structure of the filter element in the embodiments of this application. Figure 3 This is a cross-sectional perspective view of the quick-release top spray structure of the filter element in the closed position in the embodiment of this application.

[0051] See Figure 1 , Figure 2 and Figure 3 As shown, the quick-release top spray structure of this embodiment includes: a shower head body 1, a fixing ring 2, an upper cover 3, a water inlet assembly 4, and a filter element 5.

[0052] The shower head body 1 is provided with a water outlet 11 and a cavity 12 communicating with the water outlet 11. The cavity 12 is used to place the filter element 5 and is provided with an opening 13.

[0053] The fixing ring 2 is fixedly installed at the opening 13 of the shower head body 1.

[0054] The top cover 3 is rotatably connected to the shower head body 1 and is used to press the filter element 5 in the cavity 12. The top cover 3 can rotate between the open position and the closed position.

[0055] The water inlet assembly 4 is connected to the upper cover 3 and is used to deliver water to the cavity 12.

[0056] Figure 4 yes Figure 3 An enlarged view of the area within the dashed circle. Figure 5 This is a perspective view of the quick-release top spray structure of the filter element in the open position in the embodiments of this application. Figure 6 This is a cross-sectional perspective view of the quick-release top spray structure of the filter element in the open position in the embodiment of this application.

[0057] Combination Figures 4 to 6As shown, a button 21 is movably provided on the fixing ring 2. The button 21 is provided with a first step 211, and the upper cover 3 is provided with a second step 31 that matches the first step 211. When the upper cover 3 is rotated to the open position, the upper cover 3 opens the cavity 12. When the upper cover 3 is rotated to the closed position, it seals with the fixing ring 2 and closes the cavity 12. The button 21 can be moved so that the first step 211 is located on the side of the second step 31 away from the fixing ring 2, so as to restrict the rotation of the upper cover 3.

[0058] The quick-release top-spray structure of the above technical solution involves placing the filter element 5 into the cavity 12 and rotating the top cover 3 from the open position to the closed position. During rotation, the top cover 3 gradually approaches the filter element 5 inside the cavity 12. When rotated to the closed position, the top cover 3 seals against the fixing ring 2, simultaneously pressing the filter element 5 inside the cavity 12 to ensure that the filter element 5 remains in a fixed position during use and will not move due to water flow impact, thus ensuring the filtration effect. At this time, the button 21 can be moved so that the first step 211 is located on the side of the second step 31 away from the fixing ring 2. The first step 211 abuts against the second step 31, thereby limiting the top cover 3 from continuing to rotate and ensuring that the top cover 3 is stably in the closed state, maintaining the pressing force on the filter element 5 and the sealing fit with the fixing ring 2. When the water source is turned on, the water flow is delivered to the cavity 12 through the water inlet assembly 4. The water flow is filtered through the filter element 5 inside the cavity 12, and the filtered clean water is sprayed out from the water outlet 11 of the shower body 1, realizing the shower function. When the filter element 5 needs to be replaced, operate button 21 to activate it, releasing the restriction of the first step 211 on the second step 31. At this time, the upper cover 3 can rotate from the closed position to the open position under the action of external force. After the upper cover 3 is rotated to the open position, the cavity 12 is opened, and the used filter element 5 can be easily removed from the cavity 12 and replaced with a new filter element 5.

[0059] Figure 7 A perspective view of the fixing ring in the embodiments of this application. Figure 8 This is a perspective view of the top cover in the embodiment of this application.

[0060] like Figure 4 , Figure 7 and 8As shown, button 21 can be movably mounted on fixed ring 2 through the following implementation: fixed ring 2 is integrally formed with two spaced fixed walls 22, which can form the structure of fixed ring 2. Button 21 is rotatably connected between the two fixed walls 22 by a first pin 23. A spring 24 is provided between button 21 and fixed ring 2. The spring 24 pushes button 21 so that when the first step 211 is located on the side of the second step 31 away from fixed ring 2, it abuts against the upper end of the second step 31. Under the action of spring 24, button 21 is always subjected to a pushing force. When the upper cover 3 is rotated to the closed position, so that the first step 211 of button 21 is on the side of the second step 31 away from fixed ring 2, spring 24 pushes button 21 so that the first step 211 abuts against the upper end of the second step 31, thereby restricting the rotation of upper cover 3 and ensuring that upper cover 3 is stably in the closed state, pressing the filter element 5 in cavity 12. When it is necessary to open the top cover 3, the spring force of the spring 24 is overcome by operating the button 21, so that the first step 211 moves away from the upper end of the second step 31, thereby releasing the restriction on the rotation of the top cover 3.

[0061] like Figure 4 As shown, in one embodiment where the spring 24 is disposed between the fixed ring 2 and the button 21, the fixed ring 2 is provided with a guide hole 25 or a guide shaft for the spring 24, and the spring 24 is coaxially sleeved with the guide hole 25 and the guide shaft. During the rotation of the button 21, the spring 24, constrained by the guide hole 25 and the guide shaft, can only extend and retract along the axial direction, and will not deviate or twist.

[0062] Figure 9 This is a perspective view of the fastener in the embodiments of this application.

[0063] See Figure 4 and Figure 9 As shown, to improve the tightness and connection between the upper cover 3 and the fixing ring 2, the fixing ring 2 is rotatably equipped with a latching element 27 via a first pin 23. The upper cover 3 is provided with a boss 32 that matches the latching element 27. When the upper cover 3 is rotated to the closed position, the latching element 27 can rotate to engage with the boss 32, so that the upper cover 3 and the fixing ring 2 are in close contact. This ensures a tight fit between the upper cover 3 and the fixing ring 2, further enhancing the stability of the upper cover 3 in the closed state and ensuring effective compression of the filter element 5 inside the cavity 12. When it is necessary to open the upper cover 3, the latching element 27 is manually moved to separate it from the boss 32, releasing the latching restriction on the upper cover 3. The latching design of the latching element 27 and the boss 32 increases the connection strength between the upper cover 3 and the fixing ring 2. While ensuring that the upper cover 3 can rotate flexibly, it effectively prevents the upper cover 3 from accidentally opening and leaking water under the impact of water flow or external force, thus improving the sealing and stability of the entire top spray structure.

[0064] For example, such as Figure 9As shown, the buckle 27 is U-shaped, and its two ends are provided with first pin holes 271 and guide grooves 272 communicating with the first pin holes 271. The first pin holes 271 are blind holes. The two ends of the first pin 23 are rotatably disposed in the first pin holes 271 at both ends of the buckle 27. When the buckle 27 is installed or operated, the guide grooves 272 can guide the end of the first pin 23 to smoothly enter the first pin hole 271, so that the buckle 27 can accurately rotate around the first pin 23, realizing the buckling and disengaging action with the boss 32 of the upper cover 3.

[0065] Figure 10 This is a perspective view of the shower head body in the embodiment of this application.

[0066] See Figure 2 , Figure 9 and Figure 10 As shown, the upper cover 3 can be rotatably mounted on the shower body 1 in the following manner: the shower body 1 is provided with a second pin 15, and the upper cover 3 is provided with a second pin hole 33 adapted to the second pin 15 and a flared opening 34 communicating with the second pin hole 33. The small-diameter end of the flared opening 34 communicates with the second pin hole 33, and the diameter of the communication point is smaller than the outer diameter of the second pin 15. When installing the upper cover 3, the second pin 15 is aligned with the flared opening 34. Due to the guiding effect of the flared opening 34, the second pin 15 can smoothly enter the second pin hole 33, realizing the rotatable connection between the upper cover 3 and the shower body 1. At the same time, the limiting effect of the small-diameter end of the flared opening 34 can prevent the second pin 15 from coming out of the second pin hole 33, ensuring the stability of the connection.

[0067] For example, the shower head body 1 is provided with a side wall for installing the second pin 15. The side wall limits the second pin 15 in the upper, lower and left directions. The second pin 15 is inserted into the side wall from the right side. At the same time, the fixing ring 2 is provided with a limiting rib to limit the right side of the second pin 15, thereby preventing the second pin 15 from falling off.

[0068] See Figure 2As shown, in one embodiment where the fixing ring 2 is fixedly installed on the shower body 1, the fixing ring 2 is provided with a snap-fit ​​protrusion 28, and the shower body 1 has a snap-fit ​​groove 14 adapted to the snap-fit ​​protrusion 28 inside the cavity 12; the fixing ring 2 abuts against the opening 13 of the shower body 1 through the shoulder structure 26, and the snap-fit ​​protrusion 28 is engaged with the snap-fit ​​groove 14, so that the fixing ring 2 and the shower body 1 are relatively fixed. When installing the fixing ring 2, the fixing ring 2 is abutted against the opening 13 of the shower body 1 through the shoulder structure 26, and then a certain pressure is applied to insert the snap-fit ​​protrusion 28 into the snap-fit ​​groove 14, thereby achieving relative fixation between the fixing ring 2 and the shower body 1. When it is necessary to remove the fixing ring 2, the snap-fit ​​force between the snap-fit ​​protrusion 28 and the snap-fit ​​groove 14 is overcome by a specific tool or method, and the fixing ring 2 is removed. The abutment of the shoulder structure 26 further enhances the connection strength and sealing between the fixing ring 2 and the shower body 1, preventing water leakage from the connection and ensuring the normal use of the overhead spray structure.

[0069] See Figure 2 and Figure 3 As shown, in one embodiment where the water inlet assembly 4 is connected to the upper cover 3, the water inlet assembly 4 includes a ball head 41 and a ball head seat 42. The upper cover 3 is provided with at least two slots 35 of different diameters. The ball head seat 42 is provided with ribs 421 adapted to the diameter of each slot 35. The ball head seat 42 is located inside the upper cover 3, and each rib 421 is respectively located in the slot 35 with the adapted diameter. The ball head 41 is rotatably mounted on the ball head seat 42, and a washer 43 is provided between the ball head 41 and the ball head seat 42. A channel 44 is provided inside the ball head 41 and the ball head seat 42, which communicates with each other and communicates with the cavity 12. During installation, the ball head seat 42 is placed inside the upper cover 3, so that each rib 421 is inserted into the slot 35 with the adapted diameter, thereby achieving a fixed connection between the ball head seat 42 and the upper cover 3. The ball head 41 is rotatably mounted on the ball head seat 42, and the washer 43 reduces friction and wear during rotation. Water flows sequentially through the interconnected channels 44 inside the ball head 41 and ball head seat 42, entering the cavity 12. The cooperation of the slots 35 of different diameters and the ribs 421 can play a foolproof role.

[0070] Figure 11 This is a perspective view of the filter element in the embodiments of this application.

[0071] like Figure 11As shown, exemplarily, the filter element 5 includes a filter element housing 51 and a connector 52. The filter element housing 51 is hollow inside and is provided with filter media 511. The connector 52 is connected to the filter element housing 51 by threads or snaps and covers the bottom of the filter element housing 51. The filter element housing 51 is provided with a water inlet hole 512 communicating with the interior, and the connector 52 is provided with a water passage hole 521 communicating with the interior of the filter element housing 51. A ball head seat 42 is inserted into the water inlet hole 512. Water flows into the interior of the filter element housing 51 through the water passage hole 521, is filtered by the filter media 511, and flows out through the water inlet hole 512. The ball head seat 42 is inserted into the water inlet hole 512 of the filter element housing 51 to achieve connection with the filter element 5, so that the filtered water can smoothly enter the channel 44 inside the ball head 41 and the ball head seat 42.

[0072] Furthermore, the filter cartridge housing 51 is provided with a snap-fit ​​rib 513 and a locking buckle 514 at the end of the water inlet hole 512, and the ball head seat 42 is provided with a snap-fit ​​groove 422, a locking groove 423, and an anti-rotation rib 424. When the ball head seat 42 is inserted into the water inlet hole 512, the snap-fit ​​rib 513 connects with the snap-fit ​​groove 422, and when the filter cartridge 5 rotates circumferentially, the locking buckle 514 matches the locking groove 423, and the anti-rotation rib 424 blocks the locking buckle 514 to limit its rotation range. When the ball head seat 42 is inserted into the water inlet hole 512, the snap-fit ​​rib 513 connects with the snap-fit ​​groove 422 to achieve initial positioning. Then rotate the filter element 5 so that the locking buckle 514 matches the locking groove 423. At the same time, the anti-rotation rib 424 blocks the locking buckle 514 and limits the rotation range of the locking buckle 514, thereby firmly connecting the ball head seat 42 and the filter element housing 51 together to prevent loosening or falling off during use.

[0073] The above description is merely an optional embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A quick-release top spray structure for filter cartridges, characterized in that, include: The shower head body is provided with a water outlet and a cavity communicating with the water outlet. The cavity is used to hold the filter element and is provided with an opening. A retaining ring is fixedly installed at the opening of the shower head body; The top cover is rotatably connected to the shower head body and is used to press the filter element in the cavity. The top cover can rotate between an open position and a closed position. A water inlet assembly, connected to the upper cover, is used to deliver water into the cavity; The fixing ring is movably provided with a button, the button is provided with a first step, and the upper cover is provided with a second step adapted to the first step; when the upper cover is rotated to the open position, the upper cover opens the cavity; when the upper cover is rotated to the closed position, it seals with the fixing ring and closes the cavity, and the button is movable so that the first step is located on the side of the second step away from the fixing ring, so as to restrict the rotation of the upper cover.

2. The quick-release top spray structure for filter cartridges according to claim 1, characterized in that, The fixing ring is provided with two spaced-apart fixing walls, and the button is rotatably connected between the two fixing walls by a first pin; a spring is provided between the button and the fixing ring, and the spring pushes the button so that when the first step is located on the side of the second step away from the fixing ring, it abuts against the upper end of the second step.

3. The quick-release top spray structure for filter cartridges according to claim 2, characterized in that, The fixing ring is provided with a guide hole or guide shaft for the spring, and the spring is coaxially sleeved with the guide hole or guide shaft.

4. The quick-release top spray structure for filter cartridges according to claim 2, characterized in that, The retaining ring is rotatably provided with a buckle via the first pin. The upper cover is provided with a boss that matches the buckle. When the upper cover is rotated to the closed position, the buckle can rotate to engage with the boss, so that the upper cover and the retaining ring fit together.

5. The quick-release top spray structure for filter cartridges according to claim 4, characterized in that, The fastener is U-shaped and has a first pin hole and a guide groove communicating with the first pin hole at both ends. The first pin hole is a blind hole. The two ends of the first pin are rotatably disposed in the first pin holes at both ends of the fastener. The guide groove is used to guide the end of the first pin into the first pin hole.

6. The quick-release top spray structure for filter cartridges according to claim 1, characterized in that, The shower head body is provided with a second pin, and the upper cover is provided with a second pin hole adapted to the second pin and a flared mouth communicating with the second pin hole. The small diameter end of the flared mouth is connected to the second pin hole, and the diameter of the connection is smaller than the outer diameter of the second pin.

7. The quick-release top spray structure for filter cartridges according to claim 1, characterized in that, The fixing ring is provided with a snap-fit ​​protrusion, and the shower body is provided with a snap-fit ​​groove on the inner side of the cavity that is adapted to the snap-fit ​​protrusion; the fixing ring abuts against the opening of the shower body through a shoulder structure, and the snap-fit ​​protrusion and the snap-fit ​​groove are engaged to fix the fixing ring and the shower body relative to each other.

8. The quick-release top spray structure for filter cartridges according to claim 1, characterized in that, The water inlet assembly includes a ball head and a ball head seat. The upper cover is provided with at least two slots of different diameters. The ball head seat is provided with ribs adapted to the diameter of each slot. The ball head seat is disposed inside the upper cover, and each rib is disposed in a slot with a corresponding diameter. The ball head is rotatably disposed on the ball head seat, and a washer is provided between the ball head and the ball head seat. The ball head and the ball head seat are provided with interconnected channels, and the channels are connected to the cavity.

9. The quick-release top spray structure for filter cartridges according to claim 8, characterized in that, The filter element includes a filter element housing and a connector. The filter element housing is hollow inside and is provided with filter media. The connector is connected to the filter element housing by threads or snaps and covers the bottom of the filter element housing. The filter element housing is provided with a water inlet hole communicating with the interior. The connector is provided with a water passage hole communicating with the interior of the filter element housing. The ball head seat is inserted into the water inlet hole.

10. The quick-release top spray structure for filter cartridges according to claim 9, characterized in that, The filter cartridge housing is provided with a snap-fit ​​rib and a locking buckle at the end of the water inlet hole. The ball head seat is provided with a snap-fit ​​groove, a locking groove and an anti-rotation rib. When the ball head seat is inserted into the water inlet hole, the snap-fit ​​rib connects with the snap-fit ​​groove. When the filter cartridge rotates circumferentially, the locking buckle matches the locking groove. The anti-rotation rib blocks the locking buckle to limit the rotation range of the locking buckle.

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