Small inflator pump

Abstract

The utility model belongs to the technical field of air inflation equipment, and particularly relates to a small air inflation pump which comprises a blower device, a base, a machine body and a cylinder base, the base is provided with a containing cavity matched with the machine body, and the machine body is detachably arranged in the containing cavity in a sealed mode; the blower device is arranged in an inner cavity of the machine body, a first air port is formed in one end of the machine body, an air hole is formed in the other end of the machine body, and the air hole is communicated with the containing cavity; the lower area of the machine body is sleeved with the cylinder base, a partition plate is arranged on the cylinder base so as to divide the cylinder base into a first air chamber and a second air chamber located below the first air chamber, and an impeller of the blower device is arranged in the first air chamber. Therefore, the problem of low space utilization rate of the inflator pump in the prior art is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of inflation equipment, and in particular relates to a small-sized inflation pump. Background Art

[0002] The outdoor hiking market is experiencing rapid growth, with more and more people choosing to immerse themselves in nature. However, existing lightweight airbeds face a number of challenges in meeting user needs, such as the difficulty of blowing air with the mouth, the risk of bacterial growth and damage, and the fragility of conventional air pumps.

[0003] In the utility model patent with announcement number CN216975276U, a micro air pump is disclosed, including a shell and a panel fixedly connected to the shell to cover the shell; the shell is composed of a motor chamber, a turbine chamber and a power chamber, and the turbine chamber and the power chamber are formed by the panel covering the shell, and the three chambers of the motor chamber, the turbine chamber and the power chamber are closed and independent; a micro motor is fixed in the motor chamber; a turbine fixedly connected to the micro motor is provided in the turbine chamber, at least one air outlet is opened on the shell wall of the turbine chamber, and an air inlet is opened on the panel at a position corresponding to the turbine, and the air inlet is provided with a cover; a rechargeable power supply and a circuit board are fixed in the power chamber, and a control button and a charging interface are also provided on the panel; the micro motor, the control button and the charging interface are electrically connected to the circuit board and the charging power supply.

[0004] The micro air pump has a simple structure and is very convenient to use. Opening the cover connects the air inlet and outlet to the outside world. When the micromotor is operating, the turbine draws outside air through the air inlet and discharges it through the air outlet, completing the inflation process. The cover then seals the air inlet, and the inflatable gas can be used. To deflate, open the cover, connecting the air outlet and air inlet to the outside world, completing the deflation process. This simple structure significantly reduces product costs.

[0005] However, after subsequent testing, it was found that this solution still has the following disadvantages.

[0006] 1. Although the structure of the micro air pump has been optimized and improved, its structure still has the problems of large volume and low space utilization;

[0007] 2. The panel of the micro air pump is fixedly connected to the inflatable product. Once a fault occurs, it is very easy to damage the inflatable product when disassembling;

[0008] 3. The product has a single function. In the case of power failure or motor failure, there is no way to remove the air pump for manual inflation or deflation. It is difficult to adapt to the needs of different situations and has poor flexibility.

[0009] Therefore, in view of the technical problems existing in the air pump in the prior art, a more reasonable technical solution is provided to solve the problems of low space utilization and inconvenient disassembly of the air pump in the prior art. Utility Model Content

[0010] The purpose of the utility model is to provide a small air pump to solve the problem of low space utilization of air pumps in the prior art.

[0011] In order to achieve the above-mentioned object, the utility model provides a small air pump, comprising a blowing device, a base, a body and a cartridge seat, wherein the base is provided with a receiving cavity adapted to the body, and the body is sealed and detachably arranged in the receiving cavity; the blowing device is arranged in the inner cavity of the body, wherein one end of the body is provided with a first air port, and the other end is provided with an air vent, and the air vent is connected to the receiving cavity;

[0012] The cylinder seat is sleeved in the lower area of ​​the body, and a partition is provided on the cylinder seat to separate the cylinder seat into a first air chamber and a second air chamber located below the first air chamber, and the impeller of the blowing device is arranged in the first air chamber;

[0013] The partition is provided with a through hole connected to the first air chamber and the second air chamber; the base is provided with a second air port connected to the inflatable member and the inner cavity of the machine body, and the second air port is provided with an air valve;

[0014] The small air pump has an inflation state and an exhaust state. In the inflation state, gas enters the body from the first air port, and then passes through the exhaust port, the second air chamber and the first air chamber in sequence. The gas is pressurized in the first air chamber and then discharged from the second air port to the inflatable part; in the exhaust state, the gas in the inflatable part enters the first air chamber from the second air port, and then passes through the second air chamber, the air vent and the inner cavity of the body in sequence, and is finally discharged through the first air port.

[0015] In one possible design, the body includes a cover and a base coaxially arranged in sequence, the cover is provided with a first air port, one end of the base is rotatably connected to the base, and the other end is connected to the cover; the base is embedded in the accommodating cavity; wherein, when the blowing device is powered off, the base is rotated so that the small air pump switches between the inflation state and the exhaust state.

[0016] In a possible design, the cover bulges in a direction away from the blowing device to form a curved surface, and the first air inlet is provided on the cover.

[0017] In a possible design, the first air port is provided in plurality and is arranged at intervals on the cover.

[0018] In a possible design, a lug is provided on the base, and a stop seat adapted to the lug is provided on the end surface of the base; in the height direction, the stop seat and the lug at least partially overlap.

[0019] In one possible design, the width of the stop seat gradually decreases in the direction away from the axial centerline of the base; extension platforms are formed on both sides of the base, and the extension platforms extend in the radial direction, and the width of the extension platforms gradually decreases in the direction away from the axial centerline of the base.

[0020] In a possible design, a first annular groove is provided on the body, and a second annular groove corresponding to the first annular groove is provided on the base; the first annular groove and the second annular groove are formed into a limiting structure for constraining the position of the sealing ring.

[0021] In a possible design, a positioning platform is provided at the bottom of the cartridge seat, a positioning groove adapted to the positioning platform is provided on the bottom wall of the accommodating cavity, and the positioning platform is inserted into the positioning groove.

[0022] In a possible design, a first boss and a second boss are provided on the bottom wall of the accommodating cavity, the second boss is located in a middle area formed on the bottom wall, and the first boss is formed on the outer side of the second boss;

[0023] The bottom surface of the cartridge seat abuts against the first boss and the second boss.

[0024] In a possible design, a USB interface is provided on the body, and the USB interface is electrically connected to the blowing device.

[0025] Through the above technical solution, the small air pump can be used when there is electricity, and can also be easily disassembled when there is no electricity, and inflation or exhaust can be achieved manually to ensure the normal use of the inflatable parts. In addition, in the event of damage to the air pump, the inflatable parts can continue to be used by replacing the air pump, avoiding the entire inflatable parts from being scrapped. As a result, the inflatable mattress can be inflated and exhausted quickly and effectively, providing users with a more convenient and comfortable use experience. In addition, based on the structure of the small air pump, the structure of the pump machine is optimized, and its overall structure is compact and has high space utilization, and can be applied to inflatable products of different types and specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 A schematic diagram of the three-dimensional structure of a small-sized air pump provided by the present utility model in one embodiment;

[0028] Figure 2 A schematic diagram of the explosion structure of a small-sized air pump provided by the utility model in one embodiment;

[0029] Figure 3 This is a schematic cross-sectional view of the small air pump provided by the utility model when applied to an inflatable component, wherein the small air pump is in an inflating state;

[0030] Figure 4 This is a schematic cross-sectional view of the small air pump provided by the present invention when applied to an inflatable component, wherein the small air pump is in an exhaust state, and the arrow represents the flow direction of the gas;

[0031] Figure 5 This is a schematic cross-sectional view of the small air pump provided by the present invention, wherein the figure shown is a gas flow diagram in the exhaust state, and the arrow represents the flow direction of the gas;

[0032] Figure 6 This is a schematic cross-sectional view of the small-sized air pump provided by the present invention when applied to an inflatable component, wherein the diagram shows the gas flow direction in the inflated state, with arrows representing the gas flow direction;

[0033] Figure 7 This is a schematic cross-sectional structural diagram of the small air pump provided by the present invention, wherein the diagram shown is a gas flow diagram in the inflated state, and the arrows represent the flow direction of the gas.

[0034] In the above drawings: 1-base, 11-second air port, 12-air valve, 13-stop seat, 14-second annular groove, 15-first boss, 16-second boss, 17-extension platform, 2-body, 20-inner cavity, 21-first air port, 22-air vent, 23-first annular groove, 201-cover, 203-base, 204-support ear, 3-cylinder seat, 31-first air chamber, 32-second air chamber, 33-partition, 34-first air guide port, 35-second air guide port, 4-blowing device, 5-USB interface, 6-sealing ring, 7-inflatable part. DETAILED DESCRIPTION

[0035] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be noted that although the description of these embodiments is intended to help understand the present invention, they do not constitute a limitation of the present invention.

[0036] The specific structural and functional details disclosed herein are only used to describe exemplary embodiments of the present invention. However, the present invention can be embodied in many alternative forms and should not be construed as limited to the embodiments set forth herein.

[0037] According to a specific embodiment of the present disclosure, a small air pump is provided. Figures 1 to 7 One specific embodiment is shown.

[0038] See Figures 1 to 7 As shown, the small air pump includes a blowing device 4, a base 1, a body 2 and a cylinder seat 3. The base 1 is provided with a accommodating cavity adapted to the body 2, and the body 2 is sealed and detachably arranged in the accommodating cavity; the blowing device 4 is arranged in the inner cavity 20 of the body 2, wherein one end of the body 2 is provided with a first air port 21, and the other end is provided with an air vent 22, and the air vent 22 is connected to the accommodating cavity; the cylinder seat 3 is sleeved on the lower area of ​​the body 2, and a partition 33 is provided on the cylinder seat 3 to separate the cylinder seat 3 into a first air chamber 31 and a second air chamber 32 located below the first air chamber 31, and the impeller of the blowing device 4 is arranged in the first air chamber 31; wherein the partition 33 is provided with a through hole connected to the first air chamber 31 and the second air chamber 32; the base 1 is provided with a second air port 11 connected to the inflatable member 7 and the inner cavity of the body 2, and an air valve 12 is provided in the second air port 11, so that the gas flows in one direction when inflated.

[0039] The small air pump has an inflation state and an exhaust state. In the inflation state, the gas enters the body 2 from the first air port 21, and then passes through the exhaust port, the second air chamber 32 and the first air chamber 31 in sequence. After the gas is pressurized by the first air chamber 31, it is discharged from the second air port 11 to the inflatable part 7; in the exhaust state, the gas in the inflatable part 7 enters the second air chamber 32 from the second air port 11, and then passes through the first air chamber 31, the air vent 22 and the inner cavity of the body 2 in sequence, and is finally discharged through the first air port 21.

[0040] In the inflated state, the blower device 4 begins operating. Gas (typically air) enters the housing 2 from the outside through the first air port 21 of the housing 2. The gas entering the housing 2 then passes through the impeller of the blower device 4, pressurizing and accelerating the gas in the first air chamber 31, enabling better compression and propulsion, thereby efficiently pushing the gas into the inflatable element 7. The pressurized gas is then discharged into the inflatable element 7 through the second air port 11 on the base 1 (which is equipped with a valve 12 to ensure unidirectional gas flow). In this way, the inflatable element 7 (such as an air mattress) is gradually filled with gas.

[0041] When exhaust is required, the gas in the inflatable element 7 begins to flow back. The gas enters the second air chamber 32 of the housing 2 through the second air port 11 and then flows into the first air chamber 31 through the through-holes in the partition 33. This allows the gas to flow evenly throughout the entire cylinder base 3 during exhaust, thus preventing localized gas accumulation. After passing through the first air chamber 31, the gas continues to flow and then enters the inner cavity of the housing 2 through the air vent 22 of the housing 2. Finally, the gas is discharged from the first air port 21 of the housing 2 into the external environment.

[0042] Through the above technical solution, the small air pump can be used when there is electricity, and can also be easily disassembled when there is no electricity, and inflation or exhaust can be achieved manually to ensure the normal use of the inflatable part 7. In addition, in the event of damage to the air pump, the inflatable part 7 can continue to be used by replacing the air pump, avoiding the entire inflatable part 7 from being scrapped. As a result, the inflatable mattress can be inflated and exhausted quickly and effectively, providing users with a more convenient and comfortable use experience. In addition, based on the structure of the small air pump, the structure of the pump machine is optimized, and its overall structure is compact and has high space utilization, and can be applied to inflatable products of different types and specifications.

[0043] Specifically, the body 2 comprises a coaxially arranged cover 201 and base 203. The cover 201 is provided with a first air port 21. One end of the base 203 is rotatably connected to the base, and the other end is connected to the cover 201. The base 203 is embedded in the accommodating cavity. When the blower 4 is powered off, the base 203 rotates, switching the small air pump between an inflating state and an exhaust state. The cover 201 is provided with the first air port 21 for the inlet and outlet of gas. The base 203 is designed to rotate relative to the base 1.

[0044] Specifically, rotating the base 203 drives the entire body 2 to rotate, thereby switching between the inflation and exhaust states. The body is provided with a first air inlet 34 and a second air inlet 35. Rotating the body 2 switches the second air inlet 11 with the first air inlet 34 (and the second air inlet 35) on the body, thereby switching between inflation and exhaust states.

[0045] When the blowing device 4 is powered on and in operation, gas enters the machine body 2 from the first gas port 21 , is pressurized by the impeller of the blowing device 4 , and is then discharged into the inflatable member 7 through the second gas port 11 .

[0046] When exhaust is required, the blower 4 is powered off and stops operating. At this point, the user can rotate the base 203, thereby changing the air flow path within the housing 2. This blocks the air flow path originally exiting through the second air port 11, and the first air port 21, originally used for air intake, becomes an exhaust port. This allows the air in the inflatable member 7 to enter the housing 2 through the second air port 11, pass through the first and second air chambers 31 and 32, and ultimately exit through the first air port 21.

[0047] The rotatable connection between base 203 and base 1 allows the flow path of gas within housing 2 to be changed by rotating base 203. In the exhaust mode, the blower 4 is powered off and stopped, allowing gas to flow and be exhausted along the new path. This simple operation method improves convenience and efficiency.

[0048] In one specific embodiment, the cover 201 is raised in a direction away from the air blowing device 4 to form a curved surface; the first air inlet is provided on the cover 201. The curved surface design helps improve air flow, reduce resistance, and increase the efficiency of the air blowing device 4. It also enhances the structural strength of the cover 201, allowing it to withstand greater pressure or impact.

[0049] Providing the air inlet on the raised cover 201 allows the blower 4 to directly obtain fresh air from the surrounding environment, and also facilitates cleaning and maintenance of dust on the first air port 21, thereby maintaining the long-term performance and reliability of the equipment.

[0050] Furthermore, multiple first air inlets 21 are provided and spaced apart on the cover 201. This increases the air intake and improves the efficiency of the air pump. The spaced-apart air inlets allow the airflow to be more evenly distributed at the inlet of the blower 4, reducing noise and wear caused by uneven airflow distribution.

[0051] In actual application, the size and number of the air inlets can be designed according to the specifications of the cover 201 and the type of product to which the small air pump is applicable, ensuring that each air inlet can effectively inhale gas without generating excessive resistance.

[0052] In one embodiment of the present disclosure, a lug 204 is provided on the base 203, and a stopper 13 is provided on the end surface of the base 1 to mate with the lug 204. In the height direction, the stopper 13 and the lug 204 at least partially overlap. This arrangement limits the rotation angle of the base 203. Even if the user attempts to rotate the base 203, the stopper 13 will prevent it from rotating excessively.

[0053] Furthermore, the width of the stop seat 13 gradually decreases in the direction away from the axis of the base 203; extension platforms 17 are formed on both sides of the base 1, and the extension platforms 17 extend in the radial direction, and the width of the extension platforms 17 gradually decreases in the direction away from the axis of the base 1.

[0054] The width of the stopper 13 gradually decreases as it moves away from the axis of the base 203, providing a progressive stop effect. This allows the base 203 to gradually come into contact with the stopper 13 during rotation or movement, thereby limiting the rotation angle of the base 203. When the base 203 rotates to a certain position, the contact area between the lug 204 and the stopper 13 increases, providing a stable stop effect.

[0055] Extensions 17 on either side of base 1 extend radially, increasing its stability and support area, making the entire pump more stable when placed. Similar to stoppers 13, the width of extensions 17 tapers away from the centerline of base 1. This not only reduces the weight of base 1 but also helps reduce the overall size of the pump without compromising stability.

[0056] In the present disclosure, a first annular groove 23 is provided on the body 2 , and a second annular groove 14 corresponding to the first annular groove 23 is provided on the base 1 ; the first annular groove 23 and the second annular groove 14 are formed as a limiting structure for constraining the position of the sealing ring 6 .

[0057] When the housing 2 is assembled with the base 1, the first annular groove 23 and the second annular groove 14 align with each other, forming a complete retaining structure that prevents the sealing ring 6 from shifting or falling off during operation. Since the sealing ring 6 is generally an elastic sealing element, it is clamped in the gap between the first annular groove 23 and the second annular groove 14 to achieve a seal between the housing 2 and the base 1, ensuring airtightness during gas circulation.

[0058] The combination of the first annular groove 23, the second annular groove 14, and the constraining sealing ring 6 achieves a good seal between the housing 2 and the base 1, preventing gas leakage. Furthermore, the limiting structure constrains the sealing ring 6, ensuring that it maintains a stable position during operation and prevents displacement or dislodging due to vibration or impact.

[0059] The design of the annular groove and sealing ring 6 simplifies installation and maintenance, reducing operational difficulty and cost. The user can simply separate the body 2 from the base 1 without damaging the inflatable element 7. Later, other manual methods can be used to directly inflate the inflatable element 7 through the base 1, providing excellent flexibility.

[0060] In one embodiment, a positioning platform 36 is provided at the bottom of the cartridge seat 3 , and a positioning groove adapted to the positioning platform 36 is provided on the bottom wall of the accommodating cavity, and the positioning platform 36 is inserted into the positioning groove.

[0061] Positioning platform 36 is located at the bottom of cartridge holder 3 and cooperates with the positioning groove to achieve rapid and accurate positioning between cartridge holder 3 and the accommodating chamber. The positioning groove is located on the bottom wall of the accommodating chamber and its shape and size match those of positioning platform 36. It can receive positioning platform 36 and thus ensure the stability of the position of cartridge holder 3 in the accommodating chamber.

[0062] During assembly, the operator simply aligns the positioning platform 36 with the positioning slot and inserts it, eliminating the need for additional tools or complex adjustments. This improves positioning efficiency, eliminates errors during installation, and enhances overall accuracy. Furthermore, inserting the positioning platform 36 into the positioning slot prevents the cartridge holder 3 from moving or rotating within the accommodating cavity, and allows it to withstand certain external forces, ensuring the reliability of the overall structure.

[0063] As an option, the transverse cross-section of the positioning platform 36 is circular, and correspondingly, the cross-section of the positioning groove is also circular. In this way, the positioning platform can be quickly inserted into the positioning groove. In addition, the circular shaft structure is also easy to process and manufacture.

[0064] In other embodiments, the transverse cross-section of the positioning platform 36 may also be an ellipse, a cuboid, or other shapes.

[0065] Furthermore, a first boss 15 and a second boss 16 are provided on the bottom wall of the accommodating cavity. The second boss is located in the middle area of ​​the bottom wall, and the first boss is formed outside the second boss. The bottom surface of the cartridge holder abuts against the first and second bosses. In this way, the first and second bosses 15, 16 on the bottom wall of the accommodating cavity provide support references at different positions. When the cartridge holder 3 is fully inserted into the accommodating cavity, it contacts the first and second bosses 15, 16, thereby preventing the cartridge holder 3 from being inserted further, thereby preventing damage to parts due to over-insertion.

[0066] In the present disclosure, the cartridge holder 3 is provided with a first air duct 34 connected to the first air chamber 31, allowing gas to circulate between the first air duct and the first air port 21. The cartridge holder 3 is also provided with a second air duct 35 connected to the second air chamber 32, thereby achieving communication between the second air chamber 32 and the accommodating cavity, that is, allowing gas to circulate between the second air chamber 32 and the air vent 22. In the inflated state, the first air duct 34 is connected to the second air port 11, and the second air duct 35 is connected to the accommodating cavity. In the exhausted state, the first air duct 34 is connected to the accommodating cavity, and the second air duct 35 is connected to the second air port 11.

[0067] In one embodiment, the housing 2 is provided with a USB port 5 electrically connected to the blower 4. The USB port 5 can serve as a power source, providing power to the blower 4. This simplifies the use of power cords and makes the device more portable. This allows for the use of a mobile power bank (power bank) for additional power in environments where power is unavailable or difficult to access, improving the device's adaptability to various environments.

[0068] Of course, in some cases, the USB interface can also be configured as a data transfer port as needed. For example, if the blower device 4 has adjustable functions (such as wind speed and direction), the user can use the USB interface to transfer settings or data from an external device (such as a computer or smartphone) to the blower device 4 for remote control and adjustment. In some cases, the USB interface can also be used to update the firmware of the blower device 4. By connecting to an external device and downloading the latest firmware, the blower device 4 can be equipped with new functions or potential problems can be fixed.

[0069] In the present disclosure, the USB interface 5 is configured as Type-C. In other embodiments, the USB interface 5 can also be configured as any suitable structure such as Micro-USB, Apple Lightning, 30-pin Apple Dock, MagSafe, etc.

[0070] In addition, in the present disclosure, the blowing device 4 includes a motor (electric motor) and an impeller. Since their structure and working principle are all existing technologies, they are not limited or detailed here.

[0071] The present invention is not limited to the above optional embodiments. Anyone can derive various other forms of products based on the inspiration of the present invention. The above specific embodiments should not be construed as limiting the scope of protection of the present invention. The scope of protection of the present invention shall be based on the scope defined in the claims, and the specification can be used to interpret the claims.

Claims

1. A small air pump, comprising an air blowing device, characterized in that: The small air pump further comprises a base, a body and a cartridge seat, wherein the base is provided with a housing cavity adapted to the body, and the body is sealed and detachably disposed in the housing cavity; the blowing device is disposed in the inner cavity of the body, wherein one end of the body is provided with a first air port and the other end is provided with an air vent, and the air vent is communicated with the housing cavity; The cylinder seat is sleeved in the lower area of ​​the body, and a partition is provided on the cylinder seat to separate the cylinder seat into a first air chamber and a second air chamber located below the first air chamber, and the impeller of the blowing device is arranged in the first air chamber; The partition is provided with a through hole connected to the first air chamber and the second air chamber; the base is provided with a second air port connected to the inflatable member and the inner cavity of the machine body, and the second air port is provided with an air valve; The small air pump has an inflation state and an exhaust state. In the inflation state, gas enters the body from the first air port and passes through the exhaust port, the second air chamber and the first air chamber in sequence. The gas is pressurized in the first air chamber and then discharged from the second air port to the inflatable part. In the exhaust state, the gas in the inflatable part enters the first air chamber from the second air port, passes through the second air chamber, the air vent and the inner cavity of the body in sequence, and is finally discharged through the first air port.

2. The small air pump according to claim 1, characterized in that: The body includes a cover and a base which are coaxially arranged in sequence, the cover is provided with a first air port, one end of the base is rotatably connected to the base, and the other end is connected to the cover; the base is embedded in the accommodating cavity; wherein, when the blowing device is powered off, the base is rotated so that the small air pump switches between the inflation state and the exhaust state.

3. The small air pump according to claim 2, characterized in that: The cover bulges in a direction away from the blowing device to form a curved surface, and the first air inlet is arranged on the cover.

4. The small air pump according to claim 2, characterized in that: The first air ports are provided in plurality and are arranged at intervals on the cover.

5. The small air pump according to claim 2, characterized in that: The base is provided with a supporting ear, and the end surface of the base is provided with a stop seat adapted to the supporting ear; in the height direction, the stop seat and the supporting ear at least partially overlap.

6. The small air pump according to claim 5, characterized in that: The width of the stop seat gradually decreases in the direction away from the axis of the base; extension platforms are formed on both sides of the base, and the extension platforms extend in the radial direction, and the width of the extension platforms gradually decreases in the direction away from the axis of the base.

7. The small air pump according to claim 1, characterized in that: The body is provided with a first annular groove, and the base is provided with a second annular groove corresponding to the first annular groove; the first annular groove and the second annular groove are formed into a limiting structure for constraining the position of the sealing ring.

8. The small air pump according to claim 1, characterized in that: A positioning platform is provided at the bottom of the cartridge seat, a positioning groove adapted to the positioning platform is provided on the bottom wall of the accommodating cavity, and the positioning platform is inserted into the positioning groove.

9. The small air pump according to claim 8, characterized in that: A first boss and a second boss are provided on the bottom wall of the accommodating cavity. The second boss is located in the middle area of ​​the bottom wall, and the first boss is formed on the outside of the second boss. The bottom surface of the cartridge seat abuts against the first boss and the second boss.

10. The small air pump according to claim 1, characterized in that: The machine body is provided with a USB interface, which is electrically connected to the blowing device.

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