Small inflator pump

Abstract

The invention belongs to the technical field of inflation equipment, and particularly relates to a small inflator pump which comprises a blower device, a base, a machine body and a barrel base, a containing cavity matched with the machine body is formed in the base, 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 invention belongs to the technical field of inflatable equipment, and in particular relates to a small-sized inflatable pump. Background Art

[0002] At present, the outdoor hiking market is showing a rapid growth trend, and more and more people are choosing to integrate into nature. However, existing lightweight airbed products have a series of challenges in meeting user needs, such as the difficulty of blowing air with the mouth, easy damage due to bacterial growth, and the fragile and easy damage of conventional air pump structures.

[0003] In the invention patent with the 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, 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 at a position corresponding to the turbine on the panel, 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, 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. The cover is opened to connect the air inlet and the air outlet and the outside world. When the micro motor is working, the turbine allows the outside air to be sucked in from the air inlet and discharged from the air outlet, completing the inflation process. Then, the cover is closed to seal the air inlet, and the inflatable gas can be used. When deflation is required, the cover is opened, and the air outlet and the air inlet are connected and communicated with the outside world, completing the deflation process. The present invention can greatly reduce product costs due to its simple structure.

[0005] However, after further 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 failure occurs, the inflatable product is easily damaged during disassembly;

[0008] 3. The product has a single function. In the case of no power or motor failure, there is no way to remove the air pump for manual inflation or exhaust. It is difficult to meet 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. Summary of the invention

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

[0011] In order to achieve the above-mentioned object, the present invention provides a small-sized air pump, comprising a blowing device, a base, a body and a cylinder seat, wherein the base is provided with a housing cavity adapted to the body, and the body is sealed and detachably arranged in the housing 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 housing 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] Wherein, 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 component. In the exhaust state, the gas in the inflatable component 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 then is discharged through the first air port.

[0015] In a 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 arranged on the cover.

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

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

[0019] In a possible design, 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.

[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 matched with 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 to avoid the entire inflatable parts being scrapped. As a result, the inflatable mattress can be inflated and exhausted quickly and effectively, thereby 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 drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 creative work.

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

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

[0029] Figure 3 A schematic cross-sectional view of the structure of the small-sized air pump provided by the present invention when applied to an inflatable component, wherein the small-sized air pump is in an inflating state;

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

[0031] Figure 5 A cross-sectional structural schematic diagram of a small-sized air pump provided by the present invention, wherein the diagram shown is a gas flow diagram in an exhaust state, and arrows represent the flow direction of the gas;

[0032] Figure 6 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 shown is a gas flow diagram in an inflated state, and arrows represent the flow direction of the gas;

[0033] Figure 7 This is a schematic cross-sectional structure diagram of the small air pump provided by the present invention, wherein the diagram shown is a gas flow diagram in an inflated state, and the arrow represents 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-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 used to help understand the present invention, it does not constitute a limitation of the present invention.

[0036] The specific structural and functional details disclosed herein are only for describing 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 also Figures 1 to 7 As shown, the small air pump includes a blowing device 4, a base 1, a body 2 and a cartridge 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 a first air port 21 is provided at one end of the body 2, and an air vent 22 is provided at the other end, and the air vent 22 is connected to the accommodating cavity; the cartridge seat 3 is sleeved in the lower area of ​​the body 2, and a partition 33 is provided on the cartridge seat 3 to separate the cartridge 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 unidirectionally in the inflated state.

[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. The gas is pressurized in the first air chamber 31 and then discharged from the second air port 11 to the inflatable member 7; in the exhaust state, the gas in the inflatable member 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 then is discharged through the first air port 21.

[0040] In the inflated state, the blower device 4 starts to work. Gas (usually air) enters the body 2 from the outside through the first air port 21 of the body 2. The gas entering the body 2 then passes through the impeller of the blower device 4, thereby pressurizing and accelerating the gas in the first air chamber 31, so that it can be better compressed and pushed, and thus efficiently pushed into the inflatable member 7. The pressurized gas is discharged into the inflatable member 7 through the second air port 11 on the base 1 (the air port is provided with an air valve 12 to ensure the unidirectional flow of the gas). In this way, the inflatable member 7 (such as an inflatable mattress) can be gradually filled with gas.

[0041] When exhaust is required, the gas in the inflatable member 7 begins to flow back. The gas enters the second air chamber 32 of the body 2 through the second air port 11, and then flows into the first air chamber 31 through the through hole on the partition 33, so that the gas can flow evenly through the entire cylinder seat 3 during the exhaust process, thereby avoiding local accumulation of gas. The gas continues to flow after passing through the first air chamber 31, and then enters the inner cavity of the body 2 through the air hole 22 of the body 2. Finally, the gas is discharged from the first air port 21 of the body 2 to 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, thereby avoiding the entire inflatable part 7 from being scrapped. As a result, the inflatable mattress can be inflated and exhausted quickly and effectively, thereby 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 includes a cover 201 and a base 203 which are coaxially arranged in sequence. 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 is rotated so that the small air pump switches between the inflation state and the exhaust state. The cover 201 is provided with a first air port 21 for the entry and discharge of gas. The base 203 is designed so that it can rotate relative to the base 1.

[0044] Specifically, when the base 203 is rotated, the entire body 2 can be driven to rotate, thereby realizing the switching between the inflation and exhaust states. The body is provided with a first air guide port 34 and a second air guide port 35. When the body 2 is rotated, the second air port 11 is switched with the first air guide port 34 (and the second air guide port 35) on the body, thereby realizing the switching between inflation and exhaust.

[0045] When the blower 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 blower device 4 , and is then discharged into the inflatable member 7 through the second gas port 11 .

[0046] When exhaust is required, the blower device 4 is powered off and stops running. At this time, the user can rotate the base 203 to change the gas flow path inside the body 2, so that the gas path originally discharged from the second gas port 11 is blocked, and the first gas port 21 originally used for air intake becomes an exhaust port. In this way, the gas in the inflatable member 7 can enter the body 2 through the second gas port 11, pass through the first gas chamber 31 and the second gas chamber 32, and finally be discharged from the first gas port 21.

[0047] The base 203 is rotatably connected to the base 1, and the internal gas flow path of the body 2 can be changed by rotating the base 203. In the exhaust state, the blower 4 is powered off and stops running, so that the gas can flow and be discharged along a new path. This operation method is simple and improves the convenience and efficiency of use.

[0048] In a specific embodiment, the cover 201 bulges 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 to improve air flow, reduce resistance, and improve the efficiency of the air blowing device 4. At the same time, the structural strength of the cover 201 can also be enhanced so that it can withstand greater pressure or impact.

[0049] By arranging the air inlet on the raised cover 201, the blowing device 4 can directly obtain fresh air from the surrounding environment, and it is also convenient to clean and maintain the dust on the first air port 21, so as to maintain the long-term performance and reliability of the equipment.

[0050] Furthermore, the first air inlet 21 is provided in a plurality and arranged at intervals on the cover 201. This can increase the air intake and improve the working efficiency of the air pump. The air inlets arranged at intervals can make the airflow more evenly distributed at the inlet of the air blowing device 4, reducing the 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 an embodiment provided by the present disclosure, a lug 204 is provided on the base 203, and a stop seat 13 adapted to the lug 204 is provided on the end surface of the base 1; in the height direction, the stop seat 13 and the lug 204 at least partially overlap. This arrangement can limit the rotation angle of the base 203. Even if the user tries to rotate the base 203, the stop seat 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 stop seat 13 gradually decreases in the direction away from the axis of the base 203, which can provide a progressive stopping effect, so that the base 203 can gradually contact the stop seat 13 when rotating or moving, 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 stop seat 13 will increase, thereby providing a stable stopping effect.

[0055] The extension platforms 17 on both sides of the base 1 extend in the radial direction, which can increase the stability and support area of ​​the base 1, making the entire air pump more stable when placed. Similar to the stop seat 13, the width of the extension platform 17 also gradually decreases in the direction away from the axis of the base 1. This not only reduces the weight of the base 1, but also helps to reduce the volume of the entire air pump without affecting the 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 body 2 is assembled with the base 1, the first annular groove 23 and the second annular groove 14 will be aligned with each other, thereby forming a complete limiting structure to prevent the seal ring 6 from shifting or falling off during operation. Since the seal 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 sealing between the body 2 and the base 1, ensuring the airtightness of the gas in circulation.

[0058] By combining the first annular groove 23, the second annular groove 14 and the constraining sealing ring 6, a good seal can be achieved between the body 2 and the base 1 to prevent gas leakage. At the same time, the limiting structure can constrain the sealing ring 6 to ensure that the sealing ring 6 maintains a stable position during operation to avoid displacement or falling off due to vibration or impact.

[0059] The design of the annular groove and the sealing ring 6 makes the installation and maintenance process simple and convenient, reducing the difficulty and cost of operation. The user only needs to perform simple operations to separate the body 2 from the base 1 without causing any damage to the inflatable member 7. In the later stage, other manual methods can be used to directly inflate the inflatable member 7 through the base 1, which has good flexibility.

[0060] In one embodiment, a positioning platform 36 is provided at the bottom of the cartridge seat 3, a positioning groove matched with 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] The positioning platform 36 is located at the bottom of the cartridge seat 3 and can cooperate with the positioning groove to achieve rapid and accurate positioning between the cartridge seat 3 and the accommodating cavity. The positioning groove is located on the bottom wall of the accommodating cavity, and its shape and size match the positioning platform 36, and can receive the positioning platform 36, thereby ensuring the stability of the position of the cartridge seat 3 in the accommodating cavity.

[0062] During the assembly process, the operator only needs to align the positioning platform 36 with the positioning groove and insert it, without using additional tools or making complicated adjustments, which is beneficial to improving positioning efficiency, eliminating errors in the installation process, and improving overall accuracy. In addition, inserting the positioning platform 36 into the positioning groove can also prevent the cartridge seat 3 from moving or rotating in the accommodating cavity, and withstand a certain external force to ensure 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, wherein the second boss is located in the middle area formed on 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. In this way, the first boss 15 and the second boss 16 on the bottom wall of the accommodating cavity can provide support references at different positions, and when the cartridge seat 3 is fully inserted into the accommodating cavity, it contacts the first boss 15 and the second boss 16, thereby preventing the cartridge seat 3 from being further inserted, thereby avoiding damage to parts due to excessive insertion.

[0066] In the present disclosure, the cartridge seat 3 is provided with a first air guide port 34 connected to the first air chamber 31, so that gas can flow between the first air guide port and the first air port 21; the cartridge seat 3 is provided with a second air guide port 35 connected to the second air chamber 32, thereby achieving the connection between the second air chamber 32 and the accommodating cavity, that is, the gas can flow between the second air chamber 32 and the air vent 22. In the inflated state: the first air guide port 34 is connected to the second air port 11, and the second air guide port 35 is connected to the accommodating cavity. In the exhaust state; the first air guide port 34 is connected to the accommodating cavity, and the second air guide port 35 is connected to the second air port 11.

[0067] In one embodiment, the body 2 is provided with a USB interface 5, which is electrically connected to the blower 4. The USB interface 5 can be used as a power interface to provide power to the blower 4, which can simplify the use of the power cord and make the device more portable. In this way, in an environment where power is off or it is inconvenient to power on, a mobile power supply (power bank) can be used as a power supplement to improve the applicability to the application environment.

[0068] Of course, in some cases, the USB interface can also be set as a connection port that can be used for data transmission according to needs. For example, if the blower device 4 has adjustable functions (such as wind speed, wind direction, etc.), then through the USB interface, the user can transfer settings or data from an external device (such as a computer, a smart phone, etc.) to the blower device 4 to achieve 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, new functions are provided for the blower device 4 or potential problems are 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, and since their structure and working principle are all existing technologies, they are not limited or elaborated here.

[0071] The present invention is not limited to the above optional implementation modes, and anyone can obtain other various forms of products under the enlightenment of the present invention. The above specific implementation modes should not be understood as limiting the scope of protection of the present invention. The scope of protection of the present invention should be based on the definition in the claims, and the description can be used to interpret the claims.

Claims

1. A small air pump, comprising a blowing device, characterized in that: The small air pump also includes a base, a body and a cylinder seat, wherein the base is provided with a housing cavity adapted to the body, and the body is sealed and detachably arranged in the housing cavity; the air 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 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; Wherein, 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 into the inflatable component. In the exhaust state, the gas in the inflatable component 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 then is discharged from 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 air 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 matched with 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 matched with 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 a middle area formed on the bottom wall, and the first boss is formed on the outer side 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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