Glue filling protection assembly and water meter

Abstract

The utility model discloses a kind of glue filling protection assembly and water meter, it is related to water meter technical field, including first annular sealing component and elastic keyboard, the front end of first annular sealing component is used to abut on the inner wall of front shell, the rear end of first annular sealing component is used to abut on the circuit board of water meter;Elastic keyboard includes elastic matrix, second sealing component and multiple elastic keys arranged in the front side of elastic matrix, the rear end of elastic matrix is used to abut on circuit board, so that each elastic key and circuit board between form a key cavity, the rear end of second sealing component is used to abut on circuit board, so that front shell, second sealing component and circuit board form exhaust cavity, each key cavity is communicated with exhaust cavity, to save equipment cost, simplify process operation process, and the cost and time of artificial training, improve work efficiency, avoid AB glue into key cavity, so that elastic key is convenient to press down and rebound.

Description

Technical Field

[0001] This utility model relates to the field of water meter technology, and in particular to a potting protective component and a water meter. Background Technology

[0002] Currently, the requirements for water meter protection are becoming increasingly stringent, as are the requirements for water metering accuracy. Traditional water meters cannot guarantee the normal operation of internal electronic components and water volume measurement accuracy in harsh environments, thus necessitating a special potting process to protect the circuit board. Traditional potting technology requires complex machinery, and a vacuum process is needed to mix the AB glue to prevent air bubbles generated during mixing from adhering to the LCD screen on the circuit board. This has the following disadvantages: high equipment cost, the need to master the corresponding operating methods, increased training costs and time, complex process, and reduced work efficiency. Furthermore, traditional elastic keys have venting channels around the base plate that connect to the outside, and adjacent keys are also connected through venting channels to achieve venting and rebound of multiple keys. However, traditional elastic keys are only suitable for water meters that do not undergo potting, because after potting, the AB glue can enter between the key and the circuit board through the surrounding venting channels, making the key unpressable. Utility Model Content

[0003] To solve the above technical problems, this utility model provides a potting protective component and a water meter, which saves equipment costs, simplifies the process operation, reduces the cost and time of manual training, improves work efficiency, and prevents AB glue from entering the button cavity, making the elastic button easy to press and rebound.

[0004] To achieve the above objectives, this utility model provides the following solution:

[0005] This utility model provides a potting protective assembly, including a first annular sealing component and a resilient keypad. The first annular sealing component is disposed in a first chamber at the rear end of the front shell of a water meter, and its front end abuts against the inner wall of the front shell, with its interior corresponding to the position of a transparent window on the front shell. The rear end of the first annular sealing component abuts against the circuit board of the water meter, with its interior corresponding to the position of a liquid crystal display screen on the circuit board. The resilient keypad includes a resilient base, a second sealing component, and a plurality of resilient keys disposed on the front side of the resilient base. The front end of the resilient base abuts against the... On the inner wall of the front shell, each of the elastic buttons is used to extend into a button hole on the front shell. The rear end of the elastic base is used to abut against the circuit board and corresponds to the button area on the circuit board, so that each of the elastic buttons and the circuit board forms a button cavity. The second sealing member is disposed at the lower part of the elastic base. The front end of the second sealing member is used to abut against the inner wall of the front shell, and the rear end of the second sealing member is used to abut against the circuit board, so that an exhaust cavity is formed between the front shell, the second sealing member and the circuit board, and each of the button cavities is connected to the exhaust cavity.

[0006] Preferably, it further includes a first annular boss, which is disposed at the rear end of the transparent window, and the front end of the first annular sealing member is fixedly sleeved on the outside of the first annular boss.

[0007] Preferably, the first annular sealing component includes an annular base and an inner sealing ring and an outer sealing ring disposed on the front side of the annular base. The outer sealing ring is gapped around the outside of the inner sealing ring. The front ends of both the inner and outer sealing rings are used to abut against the inner wall of the front shell. The rear end of the annular base is used to abut against the circuit board. The front end of the inner sealing ring is used to be fixedly sleeved around the outside of the first annular boss.

[0008] Preferably, a light-transmitting opening is provided on one side of the annular substrate, and the light-transmitting opening is used to correspond to the position of the LED light on the circuit board.

[0009] Preferably, the system further includes a second annular boss and a third annular boss, both of which are disposed on the inner wall of the front housing. The second annular boss is spaced around the outside of the plurality of button holes, and the third annular boss is spaced around the outside of the second annular boss. The elastic substrate includes a substrate and a sealing ring disposed on the outer edge of the front side of the substrate. The plurality of elastic buttons are disposed on the front side of the substrate. The sealing ring is fixedly disposed around the outside of the second annular boss. The front end of the substrate abuts against the rear side of the second annular boss, and the rear end of the substrate abuts against the circuit board and corresponds to the button area on the circuit board.

[0010] Preferably, the elastic button includes a conical cylinder and a pressing block disposed at the front end of the conical cylinder. The substrate is provided with a plurality of mounting holes. The rear end of each conical cylinder is connected to one of the mounting holes. The cross-section of the conical cylinder increases sequentially from front to back. Each conical cylinder can form a button cavity with the circuit board. Each pressing block is used to extend into a button hole on the front shell.

[0011] Preferably, the second sealing component includes a U-shaped sealing component and two connecting plates respectively disposed on both sides of the upper end of the U-shaped sealing component. The upper end of each connecting plate is connected to the lower end of the substrate. The front side of each connecting plate is used to abut against the third annular protrusion, and the rear side of each connecting plate is used to abut against the circuit board. The front side of the U-shaped sealing component is used to abut against the inner wall of the front shell, and the rear side of the U-shaped sealing component is used to abut against the circuit board. The upper part of the U-shaped sealing component is used to abut against the outer side of the lower end of the third annular protrusion.

[0012] This utility model also provides a water meter, including a front shell, a bottom shell, a circuit board, and a potting protective assembly. The rear end of the front shell has a first chamber, and the front end of the bottom shell has a second chamber. A transparent window is provided at the upper part of the front end of the front shell. A first annular protrusion is located at the rear end of the transparent window. Multiple button holes are provided in the middle of the front end of the front shell. The second and third annular protrusions are both located on the inner wall of the front shell. The second annular protrusion is spaced outside the multiple button holes, and the third annular protrusion is spaced outside the second annular protrusion. The front end of the first annular sealing component is fixedly fitted onto... The sealing ring is fixedly sleeved on the outside of the second annular boss outside the first annular boss. The front end of the second sealing member abuts against the inner wall of the front shell. The circuit board is disposed in the first chamber and abuts against the rear ends of the first annular sealing member, the substrate, and the second sealing member. The circuit board is detachably mounted on the front shell. The upper and lower parts of the front side of the circuit board are respectively provided with a liquid crystal display screen and a button area. The substrate corresponds to the position of the button area. The exhaust chamber is formed between the front shell, the second sealing member, and the circuit board. The bottom shell is detachably mounted on the rear side of the front shell.

[0013] Preferably, it also includes a plurality of first screws, a plurality of first fixing posts are provided on the inner wall of the front housing, a first threaded hole is provided on the rear side of each first fixing post, a plurality of first through holes are provided on the circuit board, and each first screw can pass through a first through hole and be installed in a first threaded hole.

[0014] Preferably, the assembly further includes a mating sealing ring and multiple second screws. Multiple second fixing posts are provided on the inner wall of the front shell, and each second fixing post has a second threaded hole at its rear end. Multiple second positioning posts are provided in the second chamber of the bottom shell, and each second positioning post has a second through hole. Each second through hole penetrates the rear end of the bottom shell. Each second screw can pass through a second through hole and be installed in a second threaded hole. A fourth annular boss is provided at the rear end of the front shell, and a fifth annular boss is provided at the front end of the bottom shell. The front and rear sides of the mating sealing ring are respectively provided with a first annular groove that mates with the structure of the fourth annular boss and a second annular groove that matches the structure of the fifth annular boss.

[0015] The present invention achieves the following technical advantages over the prior art:

[0016] The potting protective assembly of this utility model includes a first annular sealing component and an elastic keypad. The first annular sealing component is disposed in the first chamber at the rear end of the front shell of the water meter. The front end of the first annular sealing component abuts against the inner wall of the front shell, and its interior corresponds to the position of the transparent window on the front shell. The rear end of the first annular sealing component abuts against the circuit board of the water meter, and its interior corresponds to the position of the liquid crystal display screen on the circuit board. This makes the transparent window and the liquid crystal display screen a sealed space, preventing the glue from flowing into this sealed space during potting, thereby preventing the AB glue from affecting the transparent window and the liquid crystal display screen, and ensuring that the appearance is not affected. Compared with traditional potting technology, it does not require complex mechanical equipment, saving equipment costs, simplifying the process operation, and reducing the cost and time of manual training, thus improving work efficiency. The elastic keyboard includes an elastic base, a second sealing component, and multiple elastic keys disposed on the front side of the elastic base. The front end of the elastic base abuts against the inner wall of the front shell, and each elastic key extends into a key hole on the front shell. The rear end of the elastic base abuts against the circuit board and corresponds to the key area on the circuit board, so that each elastic key and the circuit board form a key cavity. The second sealing component is disposed at the lower part of the elastic base. The front end of the second sealing component abuts against the inner wall of the front shell, and the rear end of the second sealing component abuts against the circuit board, so that the front shell, the second sealing component, and the circuit board form an exhaust cavity. Each key cavity is connected to the exhaust cavity, so that when the elastic key is pressed, the gas in the key cavity can enter the exhaust cavity, making the elastic key easy to press and rebound, while preventing AB glue from entering the key cavity and affecting the normal operation of the elastic key. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A first perspective view of the potting protective assembly provided by this utility model;

[0019] Figure 2 A second perspective view of the potting protective assembly provided by this utility model;

[0020] Figure 3 First exploded view of the potting protective component, front shell, and circuit board provided by this utility model;

[0021] Figure 4 A second exploded view of the potting protective assembly, front shell, and circuit board provided by this utility model;

[0022] Figure 5 An installation diagram of the potting protective assembly, front shell, and circuit board provided by this utility model;

[0023] Figure 6 A schematic diagram of the installation of the potting protective component and the front shell provided by this utility model;

[0024] Figure 7 This is a schematic diagram of the front shell of the water meter provided by this utility model;

[0025] Figure 8 A front view of the potting protective assembly, front shell, and circuit board provided by this utility model;

[0026] Figure 9 for Figure 8 Sectional view along the middle AA direction;

[0027] Figure 10 The overall structural diagram of the water meter provided by this utility model;

[0028] Figure 11 An exploded view of the water meter provided for this utility model.

[0029] Explanation of reference numerals in the attached drawings: 1. First annular sealing component; 101. Annular base; 102. Inner sealing ring; 103. Outer sealing ring; 104. Light-transmitting opening; 2. Elastic keyboard; 201. Base plate; 202. Sealing ring; 203. Elastic key; 204. Connecting plate; 205. U-shaped sealing component; 3. First annular boss; 4. Second annular boss; 5. Third annular boss; 6. Front shell; 7. Transparent window; 8. Key hole; 9. Circuit board; 10. LCD screen; 11. LED light; 12. Key area; 13. First fixing post; 14. First screw; 15. Butt sealing ring; 16. Bottom shell; 17. Base shell; 18. Transparent flip cover. Detailed Implementation

[0030] 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, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] The purpose of this invention is to provide a potting protective component and a water meter, which saves equipment costs, simplifies the process operation, reduces the cost and time of manual training, improves work efficiency, prevents AB glue from entering the button cavity, and makes the elastic button easy to press and rebound.

[0032] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] like Figures 1-9 As shown, this embodiment provides a potting protective component, including a first annular sealing component 1 and a flexible keypad 2. The first annular sealing component 1 is disposed in the first chamber at the rear end of the front shell 6 of the water meter. The front end of the first annular sealing component 1 is used to abut against the inner wall of the front shell 6, and its interior corresponds to the position of the transparent window 7 on the front shell 6. The rear end of the first annular sealing component 1 is used to abut against the circuit board 9 of the water meter, and its interior corresponds to the position of the liquid crystal display screen 10 on the circuit board 9. This makes the transparent window 7 and the liquid crystal display screen 10 a sealed space, preventing the glue from flowing into this sealed space during potting, thereby preventing the AB glue from affecting the transparent window 7 and the liquid crystal display screen 10, so as not to affect the appearance. Compared with traditional potting technology, this embodiment uses the first annular sealing component 1 to directly pot the AB glue without the need for complex mechanical equipment, saving equipment costs, avoiding subsequent equipment maintenance, simplifying the process operation, and reducing the cost and time of manual training, thus improving work efficiency.

[0034] The elastic keyboard 2 includes an elastic base, a second sealing component, and multiple elastic buttons 203 disposed on the front side of the elastic base. The front end of the elastic base abuts against the inner wall of the front shell 6, and each elastic button 203 extends into a button hole 8 on the front shell 6. The rear end of the elastic base abuts against the circuit board 9 and corresponds to the button area 12 on the circuit board 9, so that each elastic button 203 and the circuit board 9 form a button cavity, and each elastic button 203 corresponds to a circuit button position in the button area 12 on the circuit board 9. The second sealing component is disposed at the lower part of the elastic base. The front end of the second sealing component abuts against the inner wall of the front shell 6, and the rear end of the second sealing component abuts against the circuit board 9, so that the front shell 6, the second sealing component, and the circuit board 9 form an exhaust cavity. Each button cavity is connected to the exhaust cavity, so that when the elastic button 203 is pressed, the gas in the button cavity can enter the exhaust cavity, making the elastic button easy to press and rebound, while preventing AB glue from entering the button cavity and affecting the normal operation of the elastic button.

[0035] This embodiment also includes a first annular boss 3, which is disposed at the rear end of the transparent window 7. The front end of the first annular sealing member 1 is fixedly sleeved on the outside of the first annular boss 3, and the rear end of the first annular sealing member 1 is loosely sleeved on the outside of the liquid crystal display screen 10 on the circuit board 9. By setting the first annular boss 3, the first annular sealing member 1 is positioned and installed so that its interior accurately corresponds to the positions of the transparent window 7 and the liquid crystal display screen 10 on the circuit board 9. At the same time, the first annular boss 3 further prevents AB glue from flowing onto the transparent window 7.

[0036] In this specific embodiment, both the first annular sealing component 1 and the elastic keyboard 2 are made of silicone.

[0037] The first annular sealing component 1 includes an annular base 101 and an inner sealing ring 102 and an outer sealing ring 103 disposed on the front side of the annular base 101. Specifically, the inner sealing ring 102 and the outer sealing ring 103 are respectively connected to the inner ring and the outer ring of the annular base 101. The outer sealing ring 103 is gapped and sleeved on the outside of the inner sealing ring 102. The front ends of the inner sealing ring 102 and the outer sealing ring 103 are used to abut against the inner wall of the front shell 6. The rear end of the annular base 101 is used to abut against the circuit board 9. The front end of the inner sealing ring 102 is used to be fixedly sleeved on the outside of the first annular boss 3. The rear end of the inner sealing ring 102 is used to be gapped and sleeved on the outside of the liquid crystal display screen 10 on the circuit board 9.

[0038] A light-transmitting opening 104 is provided on one side of the annular base 101. The light-transmitting opening 104 is used to correspond to the position of the LED lamp 11 on the circuit board 9, so that the LED lamp 11 on the circuit board 9 can transmit light to the outside through the light-transmitting opening 104 and then through the light-transmitting hole on the front shell 6.

[0039] This embodiment also includes a second annular boss 4 and a third annular boss 5. Both the second annular boss 4 and the third annular boss 5 are used to be disposed on the inner wall of the front shell 6. The second annular boss 4 is used to be spaced outside the multiple button holes 8, and the third annular boss 5 is used to be spaced outside the second annular boss 4.

[0040] The elastic substrate includes a substrate 201 and a sealing ring 202 disposed on the outer edge of the front side of the substrate 201. Multiple elastic buttons 203 are disposed on the front side of the substrate 201. The sealing ring 202 is used to fix and sleeve the outside of the second annular protrusion 4. The front end of the substrate 201 is used to abut against the rear side of the second annular protrusion 4. The rear end of the substrate 201 is used to abut against the circuit board 9 and corresponds to the position of the button area 12 on the circuit board 9.

[0041] The elastic button 203 includes a conical cylinder and a pressing block disposed at the front end of the conical cylinder. The base plate 201 is provided with multiple mounting holes. The rear end of each conical cylinder is connected to a mounting hole. The cross-section of the conical cylinder increases from front to back. Each conical cylinder can form a button cavity with the circuit board 9. Each pressing block is used to extend into a button hole 8 on the front shell 6.

[0042] The second sealing component includes a U-shaped sealing component 205 and two connecting plates 204 respectively disposed on both sides of the upper end of the U-shaped sealing component 205. The upper end of each connecting plate 204 is connected to the lower end of the substrate 201. The front side of each connecting plate 204 is used to abut against the third annular boss 5, and the rear side of each connecting plate 204 is used to abut against the circuit board 9. The front side of the U-shaped sealing component 205 is used to abut against the inner wall of the front shell 6, and the rear side of the U-shaped sealing component 205 is used to abut against the circuit board 9. The upper part of the U-shaped sealing component 205 is used to abut against the outer side of the lower end of the third annular boss 5, thereby forming an exhaust chamber.

[0043] In this specific embodiment, multiple elastic buttons 203 are arranged in multiple groups from top to bottom. Each group of elastic buttons 203 includes multiple elastic buttons 203 arranged from left to right. Any two adjacent elastic buttons 203 in each group are connected by a horizontal connecting groove provided on the rear side of the substrate 201. Any two adjacent elastic buttons 203 corresponding to each other from top to bottom are connected by a vertical connecting groove provided on the rear side of the substrate 201. The lower part of each elastic button 203 in the lowest group is connected to the exhaust chamber through a bottom connecting groove provided on the rear side of the substrate 201, thereby realizing that the button cavity at the rear end of each elastic button 203 is connected to the exhaust chamber. Specifically, the multiple bottom connecting grooves are located between the two connecting plates 204.

[0044] like Figure 10 and Figure 11As shown, this embodiment also provides a water meter, including a front shell 6, a bottom shell 16, a circuit board 9, and a potting protective assembly. A first chamber is provided at the rear end of the front shell 6, and a second chamber is provided at the front end of the bottom shell 16. A transparent window 7 is provided at the upper part of the front end of the front shell 6. A first annular protrusion 3 is located at the rear end of the transparent window 7. Multiple button holes 8 are provided in the middle of the front end of the front shell 6. A second annular protrusion 4 and a third annular protrusion 5 are both located on the inner wall of the front shell 6. The second annular protrusion 4 is spaced outside the multiple button holes 8, and the third annular protrusion 5 is spaced outside the second annular protrusion 4. An annular groove is formed between the second annular protrusion 4 and the third annular protrusion 5. The front end of a first annular sealing component 1 is fixedly fitted outside the first annular protrusion 3, and a sealing ring 202 is fixedly fitted. Outside the second annular protrusion 4, there is a gap between the sealing ring 202 and the third annular protrusion 5. The front end of the second sealing component abuts against the inner wall of the front shell 6. The circuit board 9 is disposed in the first chamber and abuts against the rear end of the first annular sealing component 1, the substrate 201, and the second sealing component. The circuit board 9 can be detachably installed on the front shell 6. The upper and lower parts of the front side of the circuit board 9 are respectively provided with a liquid crystal display screen 10 and a button area 12. The rear end of the first annular sealing component 1 is gapped outside the liquid crystal display screen 10. The substrate 201 and the button area 12 are positioned correspondingly. Each elastic button 203 forms a button cavity with the circuit board 9. An exhaust cavity is formed between the front shell 6, the second sealing component, and the circuit board 9. The bottom shell 16 can be detachably installed on the rear side of the front shell 6.

[0045] During the potting process, AB glue is placed into the annular groove formed between the second annular boss 4 and the third annular boss 5. The sealing ring 202 is then fixedly fitted onto the outside of the second annular boss 4, further preventing external water and dust from entering the elastic keyboard 2. The circuit board 9 is fixed to the front shell 6 with its face upwards. AB glue continues to be poured into the first chamber. Under the action of the first annular sealing component 1, the AB glue will not enter the sealed space containing the transparent window 7 and the LCD screen 10. Under the action of the elastic keyboard 2, the AB glue will not enter the key cavity and the exhaust cavity. When the elastic key 203 is pressed, the airflow in the key cavity will be directed into the exhaust cavity, ensuring that the elastic key 203 can rebound normally.

[0046] In this embodiment, a rectangular hole is provided at the upper part of the front end of the front shell 6. The rectangular hole is used to install the transparent window 7. The transparent window 7 is injection molded together with the front shell 6 through double injection molding, thereby improving the waterproof sealing effect.

[0047] The water meter also includes multiple first screws 14, and multiple first fixing posts 13 are provided on the inner wall of the front housing 6. Each first fixing post 13 has a first threaded hole on its rear side. The circuit board 9 has multiple first through holes. Each first screw 14 can pass through a first through hole and be installed in a first threaded hole, thereby enabling the circuit board 9 to be fixed in the first chamber of the front housing 6. When the circuit board 9 is fixed by multiple first screws 14, pressure is applied towards the first annular sealing component 1 and the elastic keypad 2, causing the first annular sealing component 1 and the elastic keypad 2 to be squeezed between the front housing 6, thereby enhancing the sealing performance.

[0048] In this embodiment, there are six first fixing posts 13, and three first fixing posts 13 are arranged from top to bottom on both the left and right sides of the first chamber of the front shell 6.

[0049] The water meter also includes multiple second screws. Multiple second fixing posts are provided on the inner wall of the front shell 6. Each second fixing post has a second threaded hole at its rear end. Multiple second positioning posts are provided in the second chamber of the bottom shell 16. Each second positioning post has a second through hole. Each second through hole penetrates the rear end of the bottom shell 16. Each second screw can pass through a second through hole and be installed in a second threaded hole, thereby enabling the bottom shell 16 to be fixed to the rear end of the front shell 6.

[0050] The water meter also includes a mating sealing ring 15. The rear end of the front shell 6 is provided with a fourth annular boss, and the front end of the bottom shell 16 is provided with a fifth annular boss. The front and rear sides of the mating sealing ring 15 are respectively provided with a first annular groove that matches the structure of the fourth annular boss and a second annular groove that matches the structure of the fifth annular boss. The above structure improves the sealing performance after the front shell 6 and the rear shell are mated and fixed.

[0051] In this specific embodiment, the mating sealing ring 15 is a silicone sealing ring.

[0052] The water meter also includes a transparent flip cover 18 and a base meter housing 17. The rear end of the bottom housing 16 is connected to the base meter housing 17. The upper end of the transparent flip cover 18 is hinged to the upper part of the front end of the front housing 6. The transparent flip cover 18 can cover the front end of the front housing 6, thereby protecting the components at the front end of the front housing 6. After flipping up the transparent flip cover 18, the elastic button 203 can be pressed.

[0053] This specification uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A potting protection assembly, characterized in that, The water meter includes a first annular sealing component and a resilient keypad. The first annular sealing component is disposed in a first chamber at the rear end of the front housing of the water meter. The front end of the first annular sealing component abuts against the inner wall of the front housing, and its interior corresponds to the position of a transparent window on the front housing. The rear end of the first annular sealing component abuts against the circuit board of the water meter, and its interior corresponds to the position of a liquid crystal display screen on the circuit board. The resilient keypad includes a resilient base, a second sealing component, and multiple resilient keys disposed on the front side of the resilient base. The front end of the resilient base abuts against the inner wall of the front housing. Each of the aforementioned elastic buttons is used to extend into a button hole on the front shell. The rear end of the elastic base is used to abut against the circuit board and corresponds to the button area on the circuit board, so that each of the elastic buttons and the circuit board forms a button cavity. The second sealing member is disposed at the lower part of the elastic base. The front end of the second sealing member is used to abut against the inner wall of the front shell, and the rear end of the second sealing member is used to abut against the circuit board, so that an exhaust cavity is formed between the front shell, the second sealing member and the circuit board, and each of the button cavities is connected to the exhaust cavity.

2. The potting shield assembly of claim 1, wherein, It also includes a first annular boss, which is disposed at the rear end of the transparent window, and the front end of the first annular sealing member is fixedly sleeved on the outside of the first annular boss.

3. The potting shield assembly of claim 2, wherein, The first annular sealing component includes an annular base and an inner sealing ring and an outer sealing ring disposed on the front side of the annular base. The outer sealing ring is gapped around the outside of the inner sealing ring. The front ends of both the inner and outer sealing rings are used to abut against the inner wall of the front shell. The rear end of the annular base is used to abut against the circuit board. The front end of the inner sealing ring is used to be fixedly sleeved around the outside of the first annular boss.

4. The potting shield assembly of claim 3, wherein, A light-transmitting opening is provided on one side of the annular substrate, and the light-transmitting opening is used to correspond to the position of the LED light on the circuit board.

5. The potting shield assembly of claim 2, wherein, It also includes a second annular boss and a third annular boss, both of which are disposed on the inner wall of the front shell. The second annular boss is used to be spaced outside the plurality of button holes, and the third annular boss is used to be spaced outside the second annular boss. The elastic substrate includes a substrate and a sealing ring disposed on the outer edge of the front side of the substrate. The plurality of elastic buttons are disposed on the front side of the substrate. The sealing ring is used to be fixedly disposed outside the second annular boss. The front end of the substrate is used to abut against the rear side of the second annular boss, and the rear end of the substrate is used to abut against the circuit board and corresponds to the button area position on the circuit board.

6. The potting shield assembly of claim 5, wherein, The elastic button includes a conical cylinder and a pressing block disposed at the front end of the conical cylinder. The substrate is provided with multiple mounting holes. The rear end of each conical cylinder is connected to one of the mounting holes. The cross-section of the conical cylinder increases sequentially from front to back. Each conical cylinder can form a button cavity with the circuit board. Each pressing block is used to extend into a button hole on the front shell.

7. The potting shield assembly of claim 5, wherein, The second sealing component includes a U-shaped sealing component and two connecting plates respectively disposed on both sides of the upper end of the U-shaped sealing component. The upper end of each connecting plate is connected to the lower end of the substrate. The front side of each connecting plate is used to abut against the third annular protrusion, and the rear side of each connecting plate is used to abut against the circuit board. The front side of the U-shaped sealing component is used to abut against the inner wall of the front shell, and the rear side of the U-shaped sealing component is used to abut against the circuit board. The upper part of the U-shaped sealing component is used to abut against the outer side of the lower end of the third annular protrusion.

8. A water meter characterized by The device includes a front shell, a bottom shell, a circuit board, and a potting protective assembly as described in any one of claims 5-7. The front shell has a first chamber at its rear end, the bottom shell has a second chamber at its front end, and a transparent window is provided at the upper part of the front end of the front shell. A first annular protrusion is located at the rear end of the transparent window. A plurality of button holes are provided at the middle of the front end of the front shell. The second and third annular protrusions are both located on the inner wall of the front shell. The second annular protrusion is spaced outside the plurality of button holes, and the third annular protrusion is spaced outside the second annular protrusion. The front end of the first annular sealing member is fixedly fitted... The sealing ring is fixedly sleeved on the outside of the second annular boss outside the first annular boss. The front end of the second sealing member abuts against the inner wall of the front shell. The circuit board is disposed in the first chamber and abuts against the rear ends of the first annular sealing member, the substrate, and the second sealing member. The circuit board is detachably mounted on the front shell. The upper and lower parts of the front side of the circuit board are respectively provided with a liquid crystal display screen and a button area. The substrate corresponds to the position of the button area. The exhaust chamber is formed between the front shell, the second sealing member, and the circuit board. The bottom shell is detachably mounted on the rear side of the front shell.

9. The water meter of claim 8, wherein, It also includes multiple first screws, and multiple first fixing posts are provided on the inner wall of the front shell. Each first fixing post has a first threaded hole on its rear side. Multiple first through holes are provided on the circuit board, and each first screw can pass through a first through hole and be installed in a first threaded hole.

10. The water meter according to claim 8, characterized in that, It also includes a mating sealing ring and multiple second screws. Multiple second fixing posts are provided on the inner wall of the front shell, and each of the second fixing posts has a second threaded hole at its rear end. Multiple second positioning posts are provided in the second chamber of the bottom shell, and each of the second positioning posts has a second through hole. Each of the second through holes penetrates the rear end of the bottom shell. Each of the second screws can pass through a second through hole and be installed in a second threaded hole. A fourth annular boss is provided at the rear end of the front shell, and a fifth annular boss is provided at the front end of the bottom shell. The front and rear sides of the mating sealing ring are respectively provided with a first annular groove that mates with the structure of the fourth annular boss and a second annular groove that matches the structure of the fifth annular boss.

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