Air valve

Abstract

The air valve comprises an upper cover, a bottom cover, an air pump assembly and a motor, the upper cover is provided with an air outlet, the bottom cover is provided with an air charging and discharging port and an air inlet groove, the air pump assembly is arranged between the upper cover and the bottom cover and used for connecting or disconnecting an air path between the air outlet and the air charging and discharging port, and a pump cavity is defined by the air pump assembly and the bottom cover. A rotatable valve body is arranged in the pump cavity, the valve body is eccentrically connected with the air pump assembly, an output shaft of the motor extends into the pump cavity and is connected with the valve body, the valve body is provided with a valve cavity, the valve cavity is provided with an air guide hole and an air inlet hole, the air guide hole is communicated with an air channel of the pump cavity, the air inlet groove is communicated with the air inlet hole, and a plugging block is movably arranged in the valve cavity. The plugging block plugs the air guide hole under the action of centrifugal force, so that the air outlet, the pump cavity and the inflation and exhaust port form an air path, and when the motor stops working, the air guide hole, the air inlet hole, the air inlet groove, the pump cavity and the inflation and exhaust port form an air path. According to the utility model, the processing cost and the processing difficulty are greatly reduced, and the use stability of the air valve is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to an air valve. Background Art

[0002] Air valves are widely used in medical equipment, instrumentation, consumer electronics, optical equipment and other scenarios. Most of the existing air valves only have exhaust functions, and a few air valves have filling and exhaust functions. Patent publication number CN117345582A discloses an automatic filling and exhaust vacuum pump, which can achieve the filling and exhaust functions, but it is necessary to open a hole on the motor shaft to use the opening on the motor shaft to achieve air intake during the filling stage. Opening a hole on the motor shaft not only has high processing costs and great manufacturing difficulty, but also easily leads to unstable motor operation. Utility Model Content

[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and provide an air valve, aiming to reduce the manufacturing cost and difficulty of the air valve and improve the working stability of the air valve.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The utility model provides a gas valve, comprising:

[0006] The upper cover is provided with an air outlet;

[0007] The bottom cover is provided with an air filling and exhaust port and an air inlet slot;

[0008] An air pump assembly is disposed between the upper cover and the bottom cover, and is used to open or close the air path between the air outlet and the charging and discharging outlet;

[0009] A motor is sealed and connected below the bottom cover, and an output shaft of the motor extends toward the bottom cover;

[0010] The air pump assembly and the bottom cover define a pump chamber, a rotatable valve body is provided in the pump chamber, the valve body is eccentrically connected to the air pump assembly, the output shaft of the motor extends into the pump chamber and is connected to the valve body, the valve body is provided with a valve chamber, the valve chamber is provided with an air guide hole connected to the air path of the pump chamber, and an air inlet hole, the air inlet groove is connected to the air inlet hole, a blocking block is movably provided in the valve chamber, when the motor is working, the blocking block blocks the air guide hole under the action of centrifugal force, so that the air outlet, the pump chamber and the inflation and exhaust ports form an air path, when the motor stops working, the air guide hole, the air inlet hole, the air inlet groove, the pump chamber and the inflation and exhaust ports form an air path.

[0011] Furthermore, the air inlet groove is arranged at the bottom of the bottom cover.

[0012] Furthermore, a sealing ring is provided between the bottom cover and the motor, the sealing ring is sealingly sleeved on the valve body, the sealing ring is provided with an air path connecting hole, one end of the air path connecting hole is connected to the air inlet groove, and the other end of the air path connecting hole is connected to the air inlet hole.

[0013] Furthermore, an embedding groove is provided at the bottom of the bottom cover, and the sealing ring is embedded in the embedding groove.

[0014] Furthermore, a reset spring for resetting the blocking block is also provided in the valve cavity, one end of the reset spring acts on the side wall of the valve cavity, and the other end of the reset spring acts on the blocking block. When the motor is working, the elastic force of the reset spring acting on the blocking block is smaller than the centrifugal force acting on the blocking block. When the motor stops working, the blocking block moves in a direction away from the air guide hole under the action of the elastic force of the reset spring, so as to reset the blocking block.

[0015] Furthermore, the blocking block includes a small cylindrical section and a large cylindrical section arranged coaxially, the length of the small cylindrical section is greater than that of the large cylindrical section, the return spring is sleeved on the small cylindrical section, and one end of the large cylindrical section close to the small cylindrical section constitutes a limit for one end of the return spring.

[0016] Furthermore, an end surface of the small cylindrical section close to one end of the air guide hole is provided with an embedded groove, and a flexible sealing member for sealing the air guide hole is provided in the embedded groove.

[0017] Further, the valve cavity is arranged eccentrically relative to the center of the valve body.

[0018] Furthermore, a counterweight is provided on the valve body.

[0019] Furthermore, the air pump assembly includes a valve plate, a leather cup, a cylinder body and a swing frame, the valve plate is arranged below the upper cover, an umbrella-shaped nail is provided on the valve plate, the valve plate is pressed on the top of the leather cup, the leather cup is installed on the cylinder body, the bottom of the leather cup is connected to the swing frame, and the swing frame is eccentrically connected to the valve body through an eccentric shaft.

[0020] Compared with the prior art, the utility model has the following beneficial effects: by arranging the air inlet groove on the bottom cover, the air inlet groove is connected with the air inlet hole, so as to realize the charging and discharging function, and at the same time, there is no need to drill a hole on the motor shaft, which greatly reduces the processing cost and processing difficulty, improves the stability of the motor operation, and makes the use of the air valve more stable and reliable.

[0021] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the utility model more obvious and easy to understand, the following preferred embodiments are specifically cited and described in detail as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 An assembly diagram of a gas valve provided for a specific embodiment of the utility model;

[0024] Figure 2 An exploded view of a gas valve provided in a specific embodiment of the utility model;

[0025] Figure 3 A cross-sectional view of a gas valve provided in a specific embodiment of the utility model;

[0026] Figure 4 A schematic diagram of a partial structure of a valve body in a gas valve provided in a specific embodiment of the utility model;

[0027] Figure 5 A schematic diagram of the structure of a bottom cover of an air valve provided in a specific embodiment of the utility model;

[0028] Figure 6 The utility model is provided in a specific embodiment of the present invention, a schematic diagram of the assembly of a bottom cover and a sealing ring in an air valve.

[0029] Reference numerals

[0030] 1. Motor; 11. Output shaft of motor; 2. Bottom cover; 21. Filling and exhaust port; 22. Pump chamber; 23. Air inlet groove; 24. Embedding groove; 3. Cylinder body; 31. Swing frame; 4. Leather cup; 5. Valve plate; 51. Umbrella; 6. Upper cover; 61. Air outlet; 7. Valve body; 71. Valve shell; 711. Eccentric hole; 7111. Eccentric shaft; 712. Counterweight hole; 713. Air inlet hole; 7121. Counterweight block; 72. Valve cover; 721. Air guide hole; 73. Inner wall groove; 732. Inner wall protrusion; 8. Blocking block; 81. Flexible seal; 82. Reset spring; 9. Sealing ring; 91. Air path connecting hole. DETAILED DESCRIPTION

[0031] The following will be combined with the specific embodiments of the utility model to clearly and completely describe the technical solution of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] It should be understood that when used in this specification and claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or collections thereof.

[0033] It should also be understood that the terms used in the utility model specification are only for the purpose of describing specific embodiments and are not intended to limit the utility model. As used in the utility model specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0034] It should be further understood that the term “and / or” used in the present specification and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0035] like Figure 1-Figure 6As shown, an embodiment of the utility model provides an air valve, including an upper cover 6, a bottom cover 2, an air pump assembly and a motor 1. The upper cover 6 is provided with an air outlet 61, and the number of the air outlets 61 is generally multiple, such as three or four. The bottom cover 2 is provided with an air filling and exhaust port 21 and an air inlet groove 23. The air filling and exhaust port 21 is used to connect with products that need to be inflated and / or exhausted from the outside, and the air inlet groove 23 is used to introduce external gas during the inflation stage. The air pump assembly is arranged between the upper cover 6 and the bottom cover 2, and is used to open or disconnect the air path between the air outlet 61 and the air filling and exhaust port 21. The motor 1 is sealed and connected to the bottom of the bottom cover 2, and the output shaft 11 of the motor extends toward the bottom cover 2. The air pump assembly and the bottom cover 2 define a pump chamber 22, in which a rotatable valve body 7 is provided. The valve body 7 is eccentrically connected to the air pump assembly, and the output shaft 11 of the motor extends into the pump chamber 22 and is connected to the valve body 7. When the motor 1 is working, the output shaft 11 of the motor will drive the valve body 7 to rotate, so that the rotation of the valve body 7 makes the air pump assembly work to realize the exhaust function. The valve body 7 is provided with a valve cavity, which is arranged horizontally. The valve cavity is provided with an air guide hole 721 connected with the pump cavity 22 and an air inlet hole 713. The air inlet groove 23 is connected with the air inlet hole 713. External gas enters through the air inlet groove 23 and reaches the air inlet hole 713. A blocking block 8 is movably arranged in the valve cavity. When the motor 1 is working, the blocking block 8 blocks the air guide hole 721 under the action of centrifugal force, so that the air outlet 61, the pump cavity 22 and the charging and exhaust port 21 form an air path. When the motor 1 stops working, the air guide hole 721, the air inlet hole 713, the air inlet groove 23, the pump cavity 22 and the charging and exhaust port 21 form an air path.

[0036] The blocking block 8 is movably arranged in the valve cavity. When the motor 1 is working, the output shaft 11 of the motor will drive the valve body 7 to rotate, and the blocking block 8 of the valve body 7 will be affected by the centrifugal force, thereby blocking the air guide hole 721. At this time, the external airflow cannot enter the pump cavity 22 from the air guide hole 721, but the air pump assembly can work normally, so that the air outlet 61, the pump cavity 22 and the charging and exhaust port 21 form an air path to achieve the exhaust function. When the motor 1 stops working, the air pump assembly does not work, and the air outlet 61, the pump cavity 22 and the charging and exhaust port 21 form an air circuit break under the action of the air pump assembly, but because the blocking block 8 is not affected by the centrifugal force, the air guide hole 721 will not be blocked. At this time, the external airflow can enter the pump cavity 22 from the air inlet groove 23 through the air inlet hole 713, so that the air inlet groove 23, the air inlet hole 713, the pump cavity 22 and the charging and exhaust port 21 form an air path to achieve the inflation function. Compared with using a solenoid valve to realize the filling and exhaust function of a vacuum pump, the present application can greatly reduce costs, and the valve body 7 and the blocking block 8 can be made smaller, which can reduce the overall volume. At the same time, the blocking block 8 relies on the action of centrifugal force to achieve the blocking function, and there will be no noise, and there will be no problem of heating of the circuit board of the vacuum pump after long-term use.

[0037] In addition, by setting the air inlet groove 23 on the bottom cover 2, the air inlet groove 23 is connected with the air inlet hole 713, which can realize the charging and exhausting function without the need to open a hole on the shaft of the motor 1, thereby greatly reducing the processing cost and difficulty, and improving the stability of the operation of the motor 1, thereby making the use of the air valve more stable and reliable.

[0038] Furthermore, if Figure 2 , Figure 5 As shown, the air inlet groove 23 is arranged at the bottom of the bottom cover 2. By utilizing the space at the bottom of the bottom cover 2 to arrange the air inlet groove 23, not only the overall structure of the air valve is made more compact, but also the effect of hidden air intake is achieved. It should be noted that the air inlet groove 23 can be one or more.

[0039] Furthermore, if Figure 2-Figure 3 , Figure 6 As shown, a sealing ring 9 is provided between the bottom cover 2 and the motor 1, and the sealing ring 9 is sealed and sleeved on the valve body 7. The sealing ring 9 is provided with an air path connecting hole 91, one end of the air path connecting hole 91 is connected to the air inlet groove 23, and the other end of the air path connecting hole 91 is connected to the air inlet hole 713. Figure 3 As shown by the arrow in , the external airflow enters from the air inlet groove 23, reaches the air path connecting hole 91, and then is sent to the air inlet hole 713. In order to improve the sealing performance, the sealing ring 9 is made of silicone material.

[0040] In this embodiment, the part where the sealing ring is connected to the valve body 7 is provided with multiple circles of sealing protrusions, and correspondingly, the valve body 7 has sealing grooves corresponding to the positions of the sealing protrusions. The multiple circles of sealing protrusions and the multiple circles of sealing grooves 9 cooperate with each other to form a multi-level seal to improve the sealing performance. Of course, in other embodiments, the number of circles can be determined according to actual conditions.

[0041] Furthermore, if Figure 5 , Figure 6 As shown, in order to facilitate the installation and fixation of the sealing ring 9 , an embedding groove 24 is provided at the bottom of the bottom cover 2 , and the sealing ring 9 is embedded in the embedding groove 24 .

[0042] Furthermore, a reset spring 82 for resetting the blocking block 8 is also provided in the valve cavity, one end of the reset spring 82 acts on the side wall of the valve cavity, and the other end of the reset spring 82 acts on the blocking block 8. When the motor 1 is working, the elastic force of the reset spring 82 on the blocking block 8 is less than the centrifugal force it is subjected to. When the motor 1 stops working, the blocking block 8 moves away from the air guide hole 721 under the elastic force of the reset spring 82 to reset the blocking block 8. The purpose of setting the reset spring 82 is to enable the blocking block 8 to automatically reset when the motor 1 is switched from the working state to the stopped state, so as to avoid affecting the entry of external gas.

[0043] In order to facilitate the movement of the blocking block 8 in the valve cavity, the shape of the blocking block 8 can be a sphere, a block or a cylinder. The material of the blocking block 88 can be iron, stainless steel or the like. Figure 2 As shown, in this embodiment, the blocking block 8 includes a small cylindrical section and a large cylindrical section arranged coaxially, the small cylindrical section and the large cylindrical section are an integrated structure, the small cylindrical section is arranged near the air guide hole 721, and the large cylindrical section is arranged near the air inlet hole 713. The length of the small cylindrical section is greater than that of the large cylindrical section, the return spring 82 is sleeved on the small cylindrical section, and one end of the large cylindrical section close to the small cylindrical section constitutes a limit for one end of the return spring 82. The blocking block 8 is not only easy to move through such a structural design, but also convenient for the return spring 82 to apply force to it.

[0044] An embedded groove is provided on the end surface of one end of the small cylindrical section close to the air guide hole 721, and a flexible seal 81 for blocking the air guide hole 721 is provided in the embedded groove. The flexible seal 81 can be more closely attached to the side wall provided with the air guide hole 721 when the blocking block 8 is subjected to the centrifugal force, thereby improving the blocking performance. Preferably, the flexible seal 81 is made of silicone material, which has a certain hardness and a certain flexibility, and can be directly fixed in the embedded groove by an adhesive, which is convenient for installation and use.

[0045] like Figure 4 As shown, the inner wall of the valve cavity is provided with a plurality of inner wall grooves 73 along the direction in which the blocking block 8 moves. The purpose of the arrangement is to provide storage space for the gas in the valve cavity when the blocking block 8 moves, thereby reducing the resistance to the sliding of the blocking block 8. Furthermore, a plurality of inner wall protrusions 732 are also provided on the inner wall of the valve cavity provided with the air inlet 713, and their functions are similar to those of the inner wall grooves 73. The combination of the two makes the movement of the blocking block 8 smoother.

[0046] The valve cavity is arranged eccentrically relative to the center of the valve body 7. The purpose of such arrangement is that since the valve body 7 itself is relatively small in volume, such a design can make the blocking block more susceptible to the centrifugal force, so as to facilitate the blocking of the air guide hole 721.

[0047] Optionally, a counterweight 7121 is provided on the valve body 7. The counterweight 7121 is located in another area of ​​the valve body 7 opposite to the valve cavity. Since the valve cavity is eccentrically arranged and the output shaft 11 of the motor is connected to the center of the bottom of the valve body 7, the counterweight 7121 can not only balance the center of gravity of the valve body 7, but also reduce the noise generated when the valve body 7 rotates.

[0048] like Figure 2-Figure 3As shown, in the present embodiment, in order to facilitate the assembly of the blocking block 8, the return spring 82 and the flexible seal 81, the valve body 7 includes a valve shell 71 and a valve cover 72 which is snap-connected to the valve shell 71, the valve cover 72 is located on one side of the valve shell 71, the valve cover 72 and the valve shell 71 jointly define a valve cavity, the valve cover 72 is provided with an air guide hole 721, the valve shell 71 is provided with an air inlet, and the upper surface of the valve shell 71 is also provided with an eccentric hole 711 and a counterweight hole 712, wherein the eccentric hole 711 is inclined for installing an eccentric shaft 7111, and the counterweight hole 712 is used for installing a counterweight block 7121.

[0049] like Figure 2-Figure 3 As shown, the air pump assembly includes a valve plate 5, a leather cup 4, a cylinder body 3 and a swing frame 31. The valve plate 5 is arranged below the upper cover 6. The valve plate 5 is provided with an umbrella 51. The valve plate 5 is pressed on the top of the leather cup 4. The leather cup 4 is installed on the cylinder body 3. The bottom of the leather cup 4 is connected to the swing frame 31. The swing frame 31 is eccentrically connected to the valve body 7 through an eccentric shaft 7111.

[0050] Specifically, the upper cover 6 is provided with an air inlet cavity at a position corresponding to the umbrella 51, and the air inlet cavity is provided with at least two guide grooves for guiding the gas to the gas outlet 61. In this embodiment, the air inlet cavity includes a first air inlet cavity for covering the umbrella 51 and a second air inlet cavity surrounding the periphery of the first air inlet cavity. The first air inlet cavity and the second air inlet cavity are connected through a plurality of connecting grooves so that the gas enters the second air inlet cavity from the first air inlet cavity, and the guide groove is provided on the second air inlet cavity. Through the structural coordination of the first air inlet cavity, the second air inlet cavity, the connecting groove and the guide groove, the gas flow rate of the vacuum pump can be effectively increased.

[0051] The upper end of the eccentric shaft 7111 is connected to the swing frame 31. The swing frame 31 is provided with at least two air inlets. A rubber diaphragm is provided at the upper end of the air inlet. A cylinder is provided at a position corresponding to each air inlet on the rubber diaphragm. A rubber valve (not shown in the figure) for covering the air inlet is provided in the cylinder. The cylinder body 3 is arranged between the swing frame 31 and the rubber diaphragm. A through hole is provided at a position corresponding to each cylinder of the cylinder body 3. The cylinder passes through the through hole and is connected to the air inlet correspondingly so that the rubber valve fits tightly on the air inlet. A ventilation position is provided at a position corresponding to each cylinder on the valve plate 5. At least one ventilation hole is provided on the ventilation position. The umbrella 51 covers the ventilation position. A mounting portion is provided at the lower end of the swing frame 31 for connecting the eccentric shaft 7111. In this embodiment, three air inlet holes are provided at the upper end of the swing frame 31, and the air inlet holes are in the shape of a hollow cylinder. Correspondingly, three cylinders are provided on the rubber diaphragm, and the cylinders are in the shape of a cylinder. Three through holes are provided on the cylinder body 3, and the through holes are in the shape of a cylinder. Of course, in other embodiments, more air inlet holes can be provided on the swing frame 31 according to actual needs, and the structures of the rubber diaphragm and the cylinder body 3 can be designed accordingly.

[0052] The umbrella 51 is provided with an umbrella cover and an umbrella handle, and the umbrella handle is arranged at the middle lower end of the umbrella cover, so that the umbrella 51 is an umbrella-shaped structure. The size of the umbrella cover matches the size of the ventilation position of the valve plate 5, and a mounting hole for passing the umbrella handle is arranged in the middle of the ventilation position, so that the umbrella 51 can move up and down relative to the ventilation position.

[0053] During operation, the motor 1 is energized to drive the output shaft 11 of the motor to rotate, and the valve body 7 rotates synchronously. The valve body 7 drives the eccentric shaft 7111 to move, so that the swing frame 31 and the rubber valve in the rubber diaphragm make reciprocating up and down swinging movements in the cylinder body 3. At this time, air is evacuated at the filling and exhaust ports 21 of the bottom cover 2, and the gas enters the rubber diaphragm through the three air inlet holes in the middle of the swing frame 31. Then the compressed gas passes through the air vents, the umbrella 51, the first air inlet, the connecting groove, the second air inlet cavity, the guide groove, and the air outlet 61 on the valve plate 5 in sequence and is discharged.

[0054] In this embodiment, in order to improve the concealment of the air outlet 61, the air outlet 61 is opened on the hole wall of the hole where the screw is installed in the upper cover 6, and is connected with the guide groove.

[0055] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the utility model, and these modifications or replacements should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A gas valve, characterized in that: include: The upper cover is provided with an air outlet; The bottom cover is provided with an air filling and exhaust port and an air inlet slot; An air pump assembly is disposed between the upper cover and the bottom cover, and is used to open or close the air path between the air outlet and the charging and discharging outlet; A motor is sealed and connected below the bottom cover, and an output shaft of the motor extends toward the bottom cover; The air pump assembly and the bottom cover define a pump chamber, a rotatable valve body is provided in the pump chamber, the valve body is eccentrically connected to the air pump assembly, the output shaft of the motor extends into the pump chamber and is connected to the valve body, the valve body is provided with a valve chamber, the valve chamber is provided with an air guide hole connected to the air path of the pump chamber, and an air inlet hole, the air inlet groove is connected to the air inlet hole, a blocking block is movably provided in the valve chamber, when the motor is working, the blocking block blocks the air guide hole under the action of centrifugal force, so that the air outlet, the pump chamber and the inflation and exhaust ports form an air path, when the motor stops working, the air guide hole, the air inlet hole, the air inlet groove, the pump chamber and the inflation and exhaust ports form an air path.

2. A gas valve according to claim 1, characterized in that: The air inlet groove is arranged at the bottom of the bottom cover.

3. A gas valve according to claim 1, characterized in that: A sealing ring is provided between the bottom cover and the motor, the sealing ring is sealingly sleeved on the valve body, the sealing ring is provided with an air path connecting hole, one end of the air path connecting hole is connected to the air inlet groove, and the other end of the air path connecting hole is connected to the air inlet hole.

4. A gas valve according to claim 3, characterized in that: An embedding groove is provided at the bottom of the bottom cover, and the sealing ring is embedded in the embedding groove.

5. A gas valve according to claim 1, characterized in that: The valve cavity is also provided with a reset spring for resetting the blocking block, one end of the reset spring acts on the side wall of the valve cavity, and the other end of the reset spring acts on the blocking block. When the motor is working, the elastic force of the reset spring on the blocking block is less than the centrifugal force it is subjected to. When the motor stops working, the blocking block moves in a direction away from the air guide hole under the action of the elastic force of the reset spring to reset the blocking block.

6. A gas valve according to claim 5, characterized in that: The blocking block includes a small cylindrical section and a large cylindrical section arranged coaxially, the length of the small cylindrical section is greater than that of the large cylindrical section, the return spring is sleeved on the small cylindrical section, and one end of the large cylindrical section close to the small cylindrical section constitutes a limit for one end of the return spring.

7. A gas valve according to claim 6, characterized in that: An end surface of the small cylindrical section close to one end of the air guide hole is provided with an embedded groove, and a flexible sealing member for sealing the air guide hole is provided in the embedded groove.

8. A gas valve according to claim 5, characterized in that: The valve chamber is arranged eccentrically relative to the center of the valve body.

9. A gas valve according to claim 8, characterized in that: A counterweight is arranged on the valve body.

10. The gas valve according to claim 1, characterized in that: The air pump assembly includes a valve plate, a leather cup, a cylinder body and a swing frame. The valve plate is arranged below the upper cover. The valve plate is provided with an umbrella. The valve plate is pressed on the top of the leather cup. The leather cup is installed on the cylinder body. The bottom of the leather cup is connected to the swing frame. The swing frame is eccentrically connected to the valve body through an eccentric shaft.

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