Air pump

Abstract

The utility model relates to the field of inflator pumps, and provides an air pump which comprises a first shell, a second shell and a third shell, and the first shell comprises a first battery shell and a first flow channel shell; the second shell comprises a second battery shell and a second runner shell; the third shell comprises a third battery shell and a third runner shell; the first battery shell, the second battery shell and the third battery shell are sequentially connected to form a battery cavity, and the battery assembly is placed in the battery cavity; the first flow channel shell, the second flow channel shell and the third flow channel shell are sequentially connected to form a flow channel cavity, and the fan blade assembly is placed in the flow channel cavity. The air pump is divided into the first shell, the second shell and the third shell from top to bottom, the first flow channel shell is integrated to the first battery shell, the second flow channel shell is integrated to the second battery shell, and the third flow channel shell is integrated to the third battery shell, so that after the first shell, the second shell and the third shell are connected, a battery cavity and a flow channel cavity can be formed at the same time; the number of parts of the air pump is reduced, assembling steps are simplified, and assembling efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of air pumps, and further relates to an air pump. Background Art

[0002] At present, the battery assembly and the fan blade assembly are important components inside the air pump. When assembling the air pump, the battery assembly and the fan blade assembly need to be fixed separately on the mounting frame first, and then the mounting frame is fixed to the inside of the air pump with screws. The battery assembly and the fan blade assembly are installed through the mounting frame, which increases the number of components and installation steps of the air pump, making the installation process cumbersome and increasing the cost of the air pump; and the mounting frame also greatly occupies the internal space of the air pump, causing the internal space of the air pump to be tight. Utility Model Content

[0003] In response to the above technical problems, the purpose of the present utility model is to provide an air pump, which is divided into a first shell, a second shell and a third shell from top to bottom. The first flow channel shell is integrated into the first battery shell, the second flow channel shell is integrated into the second battery shell, and the third flow channel shell is integrated into the third battery shell, so that after the first shell, the second shell and the third shell are connected, a battery cavity and a flow channel cavity can be formed at the same time, reducing the number of components of the air pump, simplifying the assembly steps and improving assembly efficiency.

[0004] In order to achieve the above-mentioned objectives, the present invention provides an air pump, comprising a first shell, a second shell and a third shell, the first shell comprising a first battery shell and a first flow channel shell, the top of the first flow channel shell being provided with an air inlet; the second shell comprising a second battery shell and a second flow channel shell; the third shell comprising a third battery shell and a third flow channel shell, the bottom of the third flow channel shell being provided with an air outlet; the first battery shell, the second battery shell and the third battery shell being connected in sequence to form a battery cavity, the battery cavity being suitable for placing a battery assembly; the first flow channel shell, the second flow channel shell and the third flow channel shell being connected in sequence to form a flow channel cavity, the flow channel cavity being suitable for placing a fan blade assembly, and the fan blade assembly being suitable for conducting the airflow from the air inlet to the air outlet.

[0005] In some embodiments, the second flow channel housing includes a flow channel portion, a mounting portion, and a connecting portion, wherein the flow channel portion connects the first flow channel housing and the third flow channel housing, the mounting portion is spaced apart from the inner side of the flow channel portion through the connecting portion, and the connecting portion is circumferentially spaced apart around the inner side wall of the flow channel portion, so that a channel is formed between the mounting portion and the flow channel portion;

[0006] The fan blade assembly includes fan blades and a motor. The fan blades are arranged on the top of the mounting portion. The motor is arranged on the inner side of the mounting portion and passes through the mounting portion and is connected to the fan blades.

[0007] In some embodiments, the mounting portion is further provided with a plurality of first fixing columns, and the third flow channel housing is correspondingly provided with a plurality of second fixing columns, and the first fixing columns are fixedly connected to the second fixing columns, so that the second flow channel housing is fixedly connected to the third flow channel housing;

[0008] A plurality of third fixing columns are further provided on the inner side wall of the second battery shell, and a plurality of fourth fixing columns are correspondingly provided on the inner side wall of the third battery shell. The third fixing columns are fixedly connected to the fourth fixing columns, so that the second battery shell is fixedly connected to the third battery shell.

[0009] In some embodiments, a first bayonet is provided at the bottom of the first flow channel housing, and a first slot is provided at the top of the second flow channel housing, wherein the first bayonet is adapted to be snap-fitted and fixed in the first slot, so that the first flow channel housing is fixedly connected to the second flow channel housing;

[0010] A second slot is provided at the bottom of the first battery shell, and a second opening is provided at the top of the second battery shell. The second opening is suitable for being fixed in the second slot, so that the first battery shell is fixedly connected to the second battery shell.

[0011] In some embodiments, a plurality of first wire grooves are provided at the bottom of the second flow channel shell, and a plurality of second wire grooves are provided at the top of the third flow channel shell. The first wire grooves and the second wire grooves are at least partially adapted to overlap and form wire holes, so that the wires are adapted to pass through the wire holes.

[0012] In some embodiments, the battery assembly includes a housing, a battery, and a PCB board. The housing is integrally formed on the outside of the battery and the PCB board through a thermoplastic process. A charging port is provided at the bottom of the housing, and the charging port is connected to the battery and the PCB board.

[0013] A charging port is provided at the bottom of the third battery shell of the third shell, and the charging interface is suitable for passing through the charging port.

[0014] In some embodiments, a plurality of first positioning posts are provided on the inner side wall of the first battery housing, and the first positioning posts are clamped to the top of the battery assembly;

[0015] A plurality of second positioning posts are provided on the inner side wall of the third battery shell, and the second positioning posts are clamped to the bottom of the battery assembly.

[0016] In some embodiments, a display hole is further provided at the bottom of the third battery shell, and the display hole is suitable for placing a display module.

[0017] In some embodiments, a rocker-shaped switch is further included, a first mounting groove is provided at the bottom of the second battery shell, a second mounting groove is provided at the top of the third battery shell, and the rocker-shaped switch is fixedly installed between the bottom of the first mounting groove and the bottom of the second mounting groove.

[0018] In some embodiments, the top and bottom of the rocker switch are provided with spaced-apart fixing portions and key clips, and the bottom of the first battery shell and the top of the second battery shell are both adapted to be abutted and fixed between the fixing portions and the key clips.

[0019] Compared with the prior art, the air pump provided by the present invention has at least one of the following beneficial effects:

[0020] 1. The air pump is divided into a first shell, a second shell and a third shell. The first flow channel shell is integrated into the first battery shell, the second flow channel shell is integrated into the second battery shell, and the third flow channel shell is integrated into the third battery shell. After the first shell, the second shell and the third shell are connected, a battery cavity and a flow channel cavity can be formed at the same time, reducing the number of parts of the air pump, simplifying the assembly steps and improving the assembly efficiency.

[0021] 2. The second housing and the third housing are fixedly connected by the first and second fixing columns, the third and fourth fixing columns, which facilitates the disassembly of the third housing and the maintenance of the motor in the second flow channel housing.

[0022] 3. The overlapping parts of the wire and the first wire trough and the second wire trough connect the battery cavity and the flow channel cavity. The second flow channel shell and the third flow channel shell surround and abut the wire, reducing the gas flowing from the flow channel cavity into the battery cavity and reducing the influence of the first wire trough and the second wire trough on the inflation pressure and flow.

[0023] 4. The outer shell is integrally formed on the outside of the battery and PCB board through a thermoplastic process and wraps the battery and PCB board to form a battery assembly, which improves the integration level of the battery assembly, reduces the number of parts required to install the battery assembly on the air pump, and reduces costs and assembly difficulty.

[0024] 5. This air pump uses a rocker switch. After the rocker switch is welded, it can be installed between the bottom of the first installation groove and the bottom of the second installation groove, which optimizes the installation method and reduces the installation cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The preferred embodiments will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present invention.

[0026] Figure 1 It is an overall diagram of an air pump;

[0027] Figure 2 It is a cross-sectional view of an air pump;

[0028] Figure 3 is a structural diagram of the first shell;

[0029] Figure 4 is a structural diagram of the second shell;

[0030] Figure 5 is a bottom view of the second housing;

[0031] Figure 6 is a structural diagram of the third shell;

[0032] Figure 7 This is the installation cross-section diagram of the rocker switch.

[0033] Description of Figure Numbers:

[0034] First housing 1, first battery housing 11, second slot 111, first positioning column 112, first flow channel housing 12, air inlet 120, first bayonet 121,

[0035] Second housing 2, second battery housing 21, third fixing post 211, second bayonet 212, first mounting groove 213, second flow channel housing 22, flow channel portion 221, mounting portion 222, connecting portion 223, first fixing post 224, first bayonet groove 225, first wire groove 226,

[0036] The third housing 3, the third battery housing 31, the fourth fixing column 311, the second positioning column 312, the display hole 313, the charging port 314, the second mounting groove 315, the third flow channel housing 32, the air outlet 320, the second fixing column 321, the second wire groove 322,

[0037] Battery cavity 4, battery assembly 41, charging port 42,

[0038] Flow channel cavity 5, fan blade assembly 51, fan blade 511, motor 512, rocker switch 7, fixing part 71, key clip 72. DETAILED DESCRIPTION

[0039] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without inventive work.

[0040] To simplify the drawings, only the parts relevant to the utility model are schematically shown in each figure; they do not represent the actual structure of the product. Furthermore, to simplify the drawings and facilitate understanding, in some figures, only one of the components with the same structure or function is schematically depicted or labeled. In this document, "one" not only means "only one" but also "more than one."

[0041] It should be further understood that the term "and / or" used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0042] It should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0043] In addition, in the description of this application, the terms "first", "second", etc. are only used to distinguish the description and should not be understood as indicating or implying relative importance. It should be noted that the above embodiments can be freely combined as needed. The above are only preferred implementations of the present utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present utility model, several improvements and modifications can be made, and these improvements and modifications should also be considered as the scope of protection of the present utility model.

[0044] refer to Figure 1 and Figure 2 The utility model provides an air pump, including a first shell 1, a second shell 2 and a third shell 3. The first shell 1 includes a first battery shell 11 and a first flow channel shell 12, and the top of the first flow channel shell 12 is provided with an air inlet 120; the second shell 2 includes a second battery shell 21 and a second flow channel shell 22; the third shell 3 includes a third battery shell 31 and a third flow channel shell 32, and the bottom of the third flow channel shell 32 is provided with an air outlet 320; the first battery shell 11, the second battery shell 21 and the third battery shell 31 are connected in sequence to form a battery cavity 4, and the battery cavity 4 is suitable for placing a battery assembly 41; the first flow channel shell 12, the second flow channel shell 22 and the third flow channel shell 32 are connected in sequence to form a flow channel cavity 5, and the flow channel cavity 5 is suitable for placing a fan blade assembly 51, and the fan blade assembly 51 is suitable for conducting the airflow from the air inlet 120 to the air outlet 320.

[0045] In this embodiment, the air pump is divided into a first shell 1, a second shell 2 and a third shell 3 from top to bottom. The first flow channel shell 12 is integrated into the first battery shell 11, the second flow channel shell 22 is integrated into the second battery shell 21, and the third flow channel shell 32 is integrated into the third battery shell 31. After the first shell 1, the second shell 2 and the third shell 3 are connected, a battery cavity 4 and a flow channel cavity 5 can be formed at the same time, reducing the number of components of the air pump, simplifying the assembly steps, and improving assembly efficiency.

[0046] Specifically, the first flow channel shell 12 is integrally formed with the first battery shell 11 to form a first shell 1. At this time, the first flow channel shell 12 is relatively located on the inner side of the first battery shell 11 or the first flow channel shell 12 and the first battery shell 11 are at least partially overlapped. The same applies to the second shell 2 and the third shell 3. When installing the air pump, after the first shell 1, the second shell 2 and the third shell 3 are connected to each other, the first battery shell 11, the second battery shell 21 and the third battery shell 31 are connected to each other to form a battery cavity 4, the first flow channel shell 12, the second flow channel shell 22 and the third flow channel shell 32 are connected in sequence to form a flow channel cavity 5, the top of the flow channel cavity 5 is provided with an air inlet 120, the bottom of the flow channel cavity 5 is provided with an air outlet 320, and the fan blade assembly 51 connects the air inlet 120 and the air outlet 320. Preferably, the fan blade assembly 51 is fixedly mounted on the inner side of the second flow channel shell 22. The second flow channel shell 22 includes a flow channel portion 221, a mounting portion 222, and a connecting portion 23. The flow channel portion 221 connects the first flow channel shell 12 and the third flow channel shell 32. The mounting portion 222 is spaced apart on the inner side of the flow channel portion 221 through the connecting portion 23. The connecting portion 23 is spaced apart circumferentially around the inner side wall of the flow channel portion 221, so that a channel is formed between the mounting portion 222 and the flow channel portion 221, and the channel connects the first flow channel shell 12 and the third flow channel shell 32. The connecting portion 223 is preferably a guide vane. The curvature of the guide vane is set so that the gas in the first flow channel shell 12 can pass through the channel more quickly to reach the third flow channel shell 32. The fan blade assembly 51 includes a fan blade 511 and a motor 512. The fan blade 511 is arranged at the top of the mounting portion 222. The motor 512 is arranged on the inner side of the mounting portion 222 and passes through the mounting portion 222 and then connects to the fan blade 511. It is worth noting that when the motor 512 is fixed to the inner side of the mounting portion 222, the bottom of the motor 512 is relatively located inside the third flow channel shell 32. At this time, the axial length of the mounting portion 222 does not exceed the length of the motor 512, that is, the length of the mounting portion 222 does not exceed the length of the flow channel portion 221. The mounting portion 222 is relatively located inside the second flow channel shell 22, so that the airflow through the channel can reach the bottom of the motor 512 and dissipate heat to the motor 512, which is beneficial to the volatilization of heat from the motor 512.

[0047] Further, refer to Figures 3 to 6, a plurality of first fixing columns 224 are further provided on the mounting portion 222, and a plurality of second fixing columns 321 are correspondingly provided inside the third flow channel shell 32. The first fixing columns 224 are fixedly connected to the second fixing columns 321, so that the second flow channel shell 22 is fixedly connected to the third flow channel shell 32; a plurality of third fixing columns 211 are further provided on the inner side wall of the second battery shell 21, and a plurality of fourth fixing columns 311 are correspondingly provided on the inner side wall of the third battery shell 31. The third fixing columns 211 are fixedly connected to the fourth fixing columns 311, so that the second battery shell 21 is fixedly connected to the third battery shell 31. A first bayonet 121 is provided at the bottom of the first flow channel shell 12, and a first bayonet 225 is provided at the top of the second flow channel shell 22. The first bayonet 121 is suitable for being snapped and fixed in the first bayonet 225, so that the first flow channel shell 12 is fixedly connected to the second flow channel shell 22; a second bayonet 111 is provided at the bottom of the first battery shell 11, and a second bayonet 212 is provided at the top of the second battery shell 21. The second bayonet 212 is suitable for being snapped and fixed in the second bayonet 111, so that the first battery shell 11 is fixedly connected to the second battery shell 21.

[0048] In this embodiment, the second shell 2 and the third shell 3 are fixedly connected by the first fixing column 224 and the second fixing column 321 , the third fixing column 211 and the fourth fixing column 311 , which facilitates the disassembly of the third shell 3 and the maintenance of the motor 512 in the second flow channel shell 22 .

[0049] Specifically, the second shell 2 and the third shell 3 are connected through the first fixing column 224 and the second fixing column 321, the third fixing column 211 and the fourth fixing column 311, a pair of first fixing columns 224 are spaced apart on both sides of the mounting portion 222 in the width direction of the air pump, a pair of second fixing columns 321 are spaced apart on both sides of the third flow channel shell 32 in the width direction of the air pump, a pair of third fixing columns 211 are spaced apart on both sides of the second battery shell 21 in the width of the air pump, and a pair of fourth fixing columns 311 are spaced apart on both sides of the third battery shell 31 in the width of the air pump. The first fixing column 224 and the second fixing column 321, the third fixing column 211 and the fourth fixing column 311 are fixedly connected by screws and other locking members. A pair of locking holes are provided at the bottom of the third flow channel shell 32 and the bottom of the third battery shell 31, and the locking members are locked and connected with the first fixing column 224 and the second fixing column 321 through the locking holes.

[0050] refer to Figure 3 and Figure 4The first shell 1 and the second shell 2 are fixed by the first bayonet 121 and the first slot 225, the second bayonet 212 and the second slot 111. The first bayonet 121 is located at the bottom of the first flow channel shell 12, and the second bayonet 212 is located at the top of the second battery shell 21, so that the first bayonet 121 and the second bayonet 212 are respectively located on the first shell 1 and the second shell 2, increasing the stability of the connection between the first shell 1 and the second shell 2. The first bayonet 121 and the first slot 225, the second bayonet 212 and the second slot 111 are assembled using an interference fit. It is worth noting that the first shell 1 and the second shell 2 can also be connected by a locking member and a fixing column, and the connection method is not further limited in this application.

[0051] Further, refer to Figure 5 and Figure 6 A plurality of first wire grooves 226 are provided at the bottom of the second flow channel shell 22, and a plurality of second wire grooves 322 are provided at the top of the third flow channel shell 32. The first wire grooves 226 and the second wire grooves 322 are at least partially adapted to overlap and form wire holes, so that the wires are adapted to pass through the wire holes.

[0052] In this embodiment, the overlapping parts of the wire and the first wire groove 226 and the second wire groove 322 connect the battery cavity 4 and the flow channel cavity 5, and the second flow channel shell 22 and the third flow channel shell 32 surround and abut the wire, reducing the gas flowing from the flow channel cavity 5 into the battery cavity 4, and reducing the influence of the first wire groove 226 and the second wire groove 322 on the inflation pressure and flow.

[0053] Specifically, a pair of first wire grooves 226 are spaced apart on the side of the second flow channel shell 22 near the battery cavity 4, and a pair of second wire grooves 322 are spaced apart on the side of the third flow channel shell 32 near the battery cavity 4. When the second shell 2 and the third shell 3 are fixedly connected, the first wire grooves 226 and the second wire grooves 322 are at least partially adapted to overlap and form a wire hole. The wire is abutted and fixed in the wire hole to prevent the wire from shaking. The wire connects the battery assembly 41 and the motor 512. Moreover, the second flow channel shell 22 and the third flow channel shell 32 abut and fix the wire up and down, which can reduce the gap between the wire and the wire hole, reduce the gas flowing from the flow channel cavity 5 into the battery cavity 4, and ensure the inflation effect of the flow channel cavity 5.

[0054] Furthermore, the battery assembly 41 includes a shell, a battery and a PCB board. The shell is integrally formed on the outside of the battery and the PCB board through a thermoplastic process. A charging interface 42 is provided at the bottom of the shell, and the charging interface 42 connects the battery and the PCB board; a charging port 314 is provided at the bottom of the third battery shell 31 of the third shell 3, and the charging interface 42 is suitable for passing through the charging port 314.

[0055] In this embodiment, the shell is integrally formed on the outside of the battery and PCB board through a thermoplastic process and wraps the battery and PCB board to form a battery assembly 41, thereby improving the integration level of the battery assembly 41, reducing the number of components of the air pump installation battery assembly 41, and reducing costs and assembly difficulty.

[0056] Specifically, the outer shell is made of thermoplastic material and is thermoformed onto the outside of the battery and PCB board, so that the battery and PCB board form an integrated battery assembly 41. This facilitates assembly of the battery assembly 41, simplifies the assembly steps and the number of air pump components, and eliminates the need to separately install the battery and PCB board via a limiting structure. Simultaneously, a plurality of first positioning posts 112 are provided on the inner sidewall of the first battery shell 11, which engage the top of the battery assembly 41; a plurality of second positioning posts 312 are provided on the inner sidewall of the third battery shell 31, which engage the bottom of the battery assembly 41. The battery assembly 41 is secured within the battery cavity 4 by the first fixing posts 224 and the third fixing posts 211, preventing the battery assembly 41 from shaking and striking the inner sidewall of the battery cavity 4.

[0057] It is worth noting that a display hole 313 is further provided at the bottom of the third battery shell 31 , and a display module is suitable for being placed in the display hole 313 to facilitate displaying the charging status of the battery assembly 41 .

[0058] Further, refer to Figures 5 to 7 , also includes a rocker switch 7, a first mounting groove 213 is provided at the bottom of the second battery shell 21, and a second mounting groove 315 is provided at the top of the third battery shell 31, and the rocker switch 7 is fixedly installed between the bottom of the first mounting groove 213 and the bottom of the second mounting groove 315.

[0059] In this embodiment, the air pump adopts a rocker switch 7. After being welded, the rocker switch 7 can be installed between the bottom of the first installation groove 213 and the bottom of the second installation groove 315, thereby optimizing the installation method and reducing the installation cost.

[0060] Specifically, using the rocker switch 7 eliminates the need to solder a separate switch onto a separate control PCB, saving costs. A first mounting slot 213 is provided at the bottom of the second battery housing 21, and a second mounting slot 315 is provided at the top of the third battery housing 31. The first and second mounting slots 213 and 315 reserve space for the rocker switch 7. After the second and third housings 2 and 3 are installed, the bottom of the first mounting slot 213 abuts the top of the rocker switch 7, and the bottom of the second mounting slot 315 abuts the bottom of the rocker switch 7. This allows the rocker switch 7 to be securely installed simultaneously with the second and third housings 2 and 3. The top and bottom of the rocker switch 7 are each provided with a spaced-apart fixing portion 71 and a key clip 72. The bottom sidewalls of the second and third battery housings 21 and 31 are adapted to abut and secure between the fixing portion 71 and the key clip 72, thereby securing the rocker switch 7 between the second and third battery housings 21 and 31.

[0061] It should be noted that the above embodiments can be freely combined as needed. The above are only preferred embodiments of the present invention. It should be noted that those skilled in the art can make several improvements and modifications without departing from the principles of the present invention, and such improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An air pump, characterized in that: include: A first housing, the first housing comprising a first battery housing and a first flow channel housing, wherein the top of the first flow channel housing is provided with an air inlet; a second housing, the second housing comprising a second battery housing and a second flow channel housing; A third housing, comprising a third battery housing and a third flow channel housing, wherein an air outlet is provided at the bottom of the third flow channel housing; The first battery shell, the second battery shell and the third battery shell are connected in sequence to form a battery cavity, and the battery cavity is suitable for placing a battery assembly; the first flow channel shell, the second flow channel shell and the third flow channel shell are connected in sequence to form a flow channel cavity, and the flow channel cavity is suitable for placing a fan blade assembly, and the fan blade assembly is suitable for conducting the airflow from the air inlet to the air outlet.

2. An air pump according to claim 1, characterized in that: The second flow channel housing includes a flow channel portion, a mounting portion, and a connecting portion. The flow channel portion connects the first flow channel housing and the third flow channel housing. The mounting portion is spaced apart from the inner side of the flow channel portion through the connecting portion. The connecting portions are circumferentially spaced apart around the inner side wall of the flow channel portion, so that a channel is formed between the mounting portion and the flow channel portion. The fan blade assembly includes fan blades and a motor. The fan blades are arranged on the top of the mounting portion. The motor is arranged on the inner side of the mounting portion and passes through the mounting portion and is connected to the fan blades.

3. An air pump according to claim 2, characterized in that: The mounting portion is further provided with a plurality of first fixing columns, and the third flow channel housing is correspondingly provided with a plurality of second fixing columns. The first fixing columns are fixedly connected to the second fixing columns, so that the second flow channel housing is fixedly connected to the third flow channel housing; A plurality of third fixing columns are further provided on the inner side wall of the second battery shell, and a plurality of fourth fixing columns are correspondingly provided on the inner side wall of the third battery shell. The third fixing columns are fixedly connected to the fourth fixing columns, so that the second battery shell is fixedly connected to the third battery shell.

4. An air pump according to claim 1, characterized in that: The first flow channel housing has a first bayonet at the bottom, and the second flow channel housing has a first slot at the top. The first bayonet is adapted to be fixed in the first slot, so that the first flow channel housing is fixedly connected to the second flow channel housing. A second slot is provided at the bottom of the first battery shell, and a second opening is provided at the top of the second battery shell. The second opening is suitable for being fixed in the second slot, so that the first battery shell is fixedly connected to the second battery shell.

5. An air pump according to claim 1, characterized in that: The bottom of the second flow channel shell is provided with a plurality of first wire grooves, and the top of the third flow channel shell is provided with a plurality of second wire grooves. The first wire grooves and the second wire grooves are at least partially adapted to overlap and form wire holes, so that the wires are adapted to pass through the wire holes.

6. An air pump according to claim 1, characterized in that: The battery assembly includes a housing, a battery, and a PCB board. The housing is integrally formed on the outside of the battery and the PCB board through a thermoplastic process. A charging interface is provided at the bottom of the housing, and the charging interface connects the battery and the PCB board. A charging port is provided at the bottom of the third battery shell of the third shell, and the charging interface is suitable for passing through the charging port.

7. An air pump according to claim 6, characterized in that: A plurality of first positioning posts are provided on the inner side wall of the first battery shell, and the first positioning posts are clamped to the top of the battery assembly; A plurality of second positioning posts are provided on the inner side wall of the third battery shell, and the second positioning posts are clamped to the bottom of the battery assembly.

8. An air pump according to claim 7, characterized in that: The bottom of the third battery shell is also provided with a display hole, and the display hole is suitable for placing a display module.

9. An air pump according to claim 1, characterized in that: It also includes a rocker-shaped switch. A first mounting groove is provided at the bottom of the second battery shell, and a second mounting groove is provided at the top of the third battery shell. The rocker-shaped switch is fixedly installed between the bottom of the first mounting groove and the bottom of the second mounting groove.

10. An air pump according to claim 9, characterized in that: The top and bottom of the rocker switch are both provided with a fixing portion and a key clip arranged at intervals, and the bottom of the first battery shell and the top of the second battery shell are both suitable for abutting and fixing between the fixing portion and the key clip.

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