Electric inflating device

Abstract

The utility model provides an electric inflating device. The electric inflating device comprises a shell; the machine core assembly is arranged in the shell and comprises a motor, an air cylinder connected with the motor and an air pipe connected with the air cylinder, the air cylinder comprises an air chamber, the air pipe comprises an air flow channel, the air chamber is communicated with the air flow channel, and the air chamber is communicated with the air flow channel. The airflow channel is configured to guide airflow from the air chamber to change the flowing direction. The air flow channel is configured to guide the air flow from the air chamber to change the flowing direction, so that the problem that the electric inflating device is large in length and cannot be miniaturized due to the fact that the air chamber and the air flow channel are arranged along the same straight line can be avoided.

Description

Technical Field

[0001] This utility model relates to an electric charging device, specifically a compact electric inflation device. Background Technology

[0002] Various electric tire inflators are already available on the market, such as bicycle pumps. Bicycle pumps are inflators specifically designed for bicycles, primarily used to inflate or adjust tire pressure. Their key features are portability, lightweight design, and compatibility with bicycle valves, making them ideal for carrying while cycling to address tire leaks or low pressure. While existing bicycle pumps meet basic requirements, providing a new electric inflator, especially a compact one, is both useful and necessary. Utility Model Content

[0003] Therefore, this utility model provides an electric inflation device.

[0004] To solve the above-mentioned technical problems, the present invention provides an electric inflation device, including: a housing; and a core assembly, the core assembly being disposed inside the housing, the core assembly including: a motor, a cylinder connected to the motor, and an air pipe connected to the cylinder, wherein the cylinder includes an air chamber, the air pipe includes an airflow channel, the air chamber and the airflow channel are connected, and the airflow channel is configured to guide the airflow from the air chamber to change its flow direction.

[0005] Optionally, the cylinder includes a cylinder body and a cylinder head connected to the cylinder body, the air chamber is disposed in the cylinder body, and the cylinder head includes a communicating cavity communicating with the air chamber and the airflow passage.

[0006] Optionally, the mechanism assembly also includes a piston and piston rod housed in the air chamber, the piston being connected to a first end of the piston rod, the cylinder head being connected to one end of the cylinder body and facing the piston, and the motor shaft of the motor being connected to a second end of the piston rod opposite to the first end.

[0007] Optionally, the motor and the air pipe are located on the same side of the cylinder.

[0008] Optionally, the air pipe includes a body and a connecting portion connected to the body. The airflow channel includes a main cavity, a first branch cavity, and a second branch cavity. The main cavity and the second branch cavity are disposed in the body. The first branch cavity is disposed in the connecting portion. The first branch cavity is connected to the communicating cavity of the cylinder head. The first branch cavity and the main cavity are connected through the second branch cavity. The extension direction of the second branch cavity is different from the extension direction of the main cavity and the first branch cavity. In a direction parallel to the flow direction of the airflow in the cylinder chamber, the body of the air pipe does not extend beyond the cylinder head.

[0009] Optionally, the main body of the trachea also includes a third branch cavity communicating with the main cavity, and the mechanism assembly also includes a cover covering the third branch cavity and a pressure sensor disposed on the cover.

[0010] Optionally, a bracket is also included, which is disposed inside the housing, and the movement assembly is fixed to a first side of the bracket.

[0011] Optionally, the device may also include a battery fixed to a first side of the bracket, the first side of which has a protruding partition located between the battery and the movement assembly to separate the battery and the movement assembly.

[0012] Optionally, it also includes a circuit board fixed to a second side of the bracket opposite to the first side.

[0013] Optionally, the connecting part of the air pipe is provided with a positioning hole communicating with the first branch cavity, and the cylinder head includes a protrusion facing the connecting part of the air pipe. The communicating cavity of the cylinder head passes through the protrusion, and the protrusion and the positioning hole are sealed and engaged.

[0014] Optionally, the cylinder body has a rib protruding from its circumferential outer side, and the air pipe includes a body and a connecting portion connected to the body. The connecting portion includes a guide groove, and the rib is received in the guide groove.

[0015] The present invention has the following advantages: the airflow channel is configured to guide the airflow from the air chamber to change its flow direction, thus avoiding the problem that the electric inflation device has a large length and cannot be miniaturized due to the air chamber and the airflow channel being arranged along the same straight line. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a perspective view of an electric inflation device according to an embodiment of the present utility model.

[0018] Figure 2 This is a perspective view of the electric inflation device according to an embodiment of the present invention.

[0019] Figure 3 A perspective view of the assembly inside the housing of the electric inflation device according to an embodiment of the present invention.

[0020] Figure 4 forFigure 3 The exploded view of the assembly shown.

[0021] Figure 5 for Figure 3 An exploded view of the assembly shown from another angle.

[0022] Figure 6 An exploded view of the core assembly of the electric inflation device according to an embodiment of the present invention.

[0023] Figure 7 An exploded view from another angle of the core assembly of the electric inflation device according to an embodiment of the present invention.

[0024] Figure 8 A cross-sectional view of the core assembly of the electric inflation device according to an embodiment of the present invention. Detailed Implementation

[0025] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0026] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0027] refer to Figures 1-6 In one embodiment, an electric inflation device 100 includes a housing 10 and a mechanism assembly 20. The mechanism assembly 20 is disposed inside the housing 10 and includes a motor 30, a cylinder 40 connected to the motor 30, and an air pipe 60 connected to the cylinder 40.

[0028] refer to Figures 6-8 The cylinder 40 includes an air chamber 41, and the air pipe 60 includes an airflow passage 61 communicating with the air chamber 41. The airflow passage 61 is configured to guide the airflow from the air chamber 41 to change its flow direction.

[0029] With the above-described structure, the airflow direction changes when it enters the airflow channel 61, which is the reason why the electric inflation device has a large length and cannot be miniaturized due to the air chamber 41 and the airflow channel 61 being arranged along the same straight line.

[0030] In one embodiment, the outer casing 10 is generally rectangular parallelepiped in shape, and it is in Figure 1 The front side 11 shown has an exposed through hole for the nozzle connector of the electric inflation device 100.Figure 2 The rear side 12 shown is provided with operation buttons 14 for user operation, and the electric inflation device 100 performs corresponding actions according to the user's operation, such as starting / closing the electric inflation device 100, adjusting the air pressure, etc. In one embodiment, at least part of the rear side 12 of the housing 10 is transparent, which allows the information (such as air pressure information, temperature information) displayed by the display module in the housing 10 to be observed by the user.

[0031] Reference Figures 4-6 , in one embodiment, the electric inflation device 100 further includes a battery 70 and a circuit board 80. The movement assembly 20, the battery 70 and the circuit board 80 are all fixed to a bracket 13, and the bracket 13 is fixed inside the housing 10. In one embodiment, the movement assembly 20 and the battery 70 are arranged side by side, and the circuit board 80 is located at one end of the movement assembly urchase 20 and the battery 70, which is shown in Figure 5 as the circuit board 80 being located above the movement assembly 20 and the battery 70. Such an arrangement can be abstracted as a π shape, that is, the length directions of the movement assembly 20 and the battery 70 are substantially perpendicular to the circuit board 80. Obviously, such an arrangement is beneficial to the full utilization of space and is convenient for forming a compact module.

[0032] It can be understood that the arrangement manners of the movement assembly 20, the battery 70 and the circuit board 80 are not limited to the foregoing situations. In another embodiment, the movement assembly 20, the battery 70 and the circuit board 80 are all substantially parallel, that is, such an arrangement can be abstracted as a "Sichuan" shape. Compared with the foregoing π-shaped arrangement, the "Sichuan" shape may have a smaller height at the cost of an increase in length. In another embodiment, there is another π-shaped arrangement, that is, the movement assembly 20 and the circuit board 80 are arranged side by side, and the battery 70 is located at one end of the movement assembly 20 and the circuit board 70. At this time, the battery 70 needs to be formed into a flat cuboid. In this arrangement, the length directions of the movement assembly 20 and the circuit board 80 are substantially perpendicular to the battery 70. Compared with the foregoing π-shaped arrangement, the π-shaped arrangement here may have a smaller length at the cost of an increase in height. In yet another embodiment, the motor 30 and the cylinder 40 of the movement assembly 20 are arranged in a straight line, and the battery 70 can be arranged on one side of the motor 30 and the cylinder 40.

[0033] Reference Figures 4-6 , in one embodiment, a partition 132 protrudes from the first side 131 of the bracket 13, and the partition 132 is located between the battery 70 and the movement assembly 20 to separate the battery 70 and the movement assembly 20. Thus, the partition 132 is beneficial to blocking or reducing the heat generated during the operation of the movement assembly 20 from being transferred to the battery 70. In one embodiment, the movement assembly 20 can be fixed to the bracket 12 by screws, and the battery 70 can be fixed to the partition 132 by bonding.

[0034] In one embodiment, the circuit board 80 is fixed to the second side 133 of the bracket 13 opposite to the first side 131. The circuit board 80 is provided with trigger switches corresponding to the aforementioned operation buttons 14; when an operation button 14 is pressed, the trigger switch is activated. The circuit board 80 is also provided with a display module 81, which is used to display information such as power level, air pressure, and temperature.

[0035] The mechanism assembly 20, battery 70 and circuit board 80 are fixed by bracket 13, which improves stability. The mechanism assembly 20 does not need to be directly connected to the housing 10, which makes maintenance easier and reduces the size.

[0036] In one embodiment, the first side 131 of the bracket 13 also protrudes two spaced-apart support plates 134 (see...). Figure 4 The mechanism assembly 20 is partially housed in the space between the two support plates 134. The two support plates 134 provide support for the mechanism assembly 20 and can pre-position it, facilitating its fixation by the operator. For example, in one embodiment, after placing the mechanism assembly 20 into the space between the two support plates 134, the operator can fix the motor 30 to the top of the two support plates 134 using screws.

[0037] refer to Figures 6-8 In one embodiment, the movement assembly 20 further includes a piston 42 and a piston rod 43 housed in the air chamber 41, the piston 42 being connected to the first end of the piston rod 43 (i.e., Figure 8 The piston rod 43 (shown as the right end), the cylinder head 50 is connected to one end of the cylinder 40 and faces the piston 42, the motor shaft 31 of the motor 30 is connected to the second end of the piston rod 42 opposite to the first end (i.e., the right end of the piston rod 43). Figure 8 The piston rod 43 shown is connected to the left end.

[0038] In one embodiment, the cylinder head 50 includes a communicating cavity 51, which is connected to both the air chamber 41 and the airflow passage 61.

[0039] In one embodiment, the cylinder 40 includes a cylindrical cylinder body 44, one end of which is an open end 441, and the other end is an end wall 442. The cylinder head 50 is connected to the end where the end wall 442 is located. The end wall 442 and the circumferential sidewall 443 of the cylinder body 44 together define an air chamber 41. The piston 42 extends into the air chamber 41 from the open end 441. A through hole 444 is provided on the end wall 442. When the piston 42 moves toward the end wall 442 under the action of the piston rod 43, it can push air out of the air chamber 41 through the through hole 444 and into the communicating cavity 51 of the cylinder head 50.

[0040] In one embodiment, the cylinder 40 further includes a fixing plate 45 extending along the length of the cylinder body 44 and connected to the open end 441. The motor 30 is fixed to the fixing plate 45, and the fixing plate 45 has a through hole through which the motor shaft 31 passes. With this configuration, see reference... Figure 8 A placement space is formed on the right side of the motor 30 and below the cylinder body 44. This placement space can be used to place the air pipe 60. At this time, the motor 30 and the air pipe 60 are located on the same side of the cylinder 40. This arrangement of the motor 30, cylinder 40 and air pipe 60 makes full use of the space and is conducive to forming a compact structure.

[0041] In one embodiment, the mechanism assembly 20 further includes a connecting block 32, to which the motor shaft 31 of the motor 30 and the second end of the piston rod 42 are rotatably connected at different positions. Thus, the motor 30 is a rotary motor, the motor shaft 31 can drive the connecting block 32 to rotate, and the connecting block 32 can in turn drive the piston rod 42 to swing, so that the piston rod 42 can drive the piston 42 to slide in the air chamber 41.

[0042] refer to Figure 6 and 8 In one embodiment, the cylinder head 50 includes a body 52 and one or more protrusions 53 projecting from the circumferential side of the body 52; the following description uses three protrusions as an example. One function of the protrusions 53 is to position the air pipe 60, which will be described in detail later. In one embodiment, in Figure 6 From this perspective, the three protrusions 53 are arranged sequentially along the longitudinal direction, and the connecting cavity 51 passes through the middle protrusion 53 among the three protrusions 53. In this embodiment, the connecting cavity 51 includes a shallow hole 54 provided in the body 52 and a through hole 55 passing through the side of the shallow hole 54 through the middle protrusion 53 among the three protrusions 53, thus the shallow hole 54 and the through hole 55 are connected. After the cylinder head 50 is fixed to the cylinder 40, the shallow hole 54 communicates with the air chamber 41 through the through hole 444 on the end wall 442 of the cylinder 40, thus the air chamber 41 and the connecting cavity 51 are connected. It can be understood that the cylinder head 50 is an independent component in this embodiment. In other embodiments, the cylinder head 50 and the cylinder body can be integrally formed into a single component.

[0043] In one embodiment, the trachea 60 includes a body 601 and a connecting portion 602 connected to the body 601. The body 601 is generally a cylindrical rotating body, and the connecting portion 602 is located at one end of the body 601. The airflow channel 61 includes a main cavity 62, a first branch cavity 63, and a second branch cavity 64. The main cavity 62 and the second branch cavity 64 are disposed in the body 601, and the second branch cavity 64 is disposed in the connecting portion 602. The main cavity 62 extends from one end of the trachea 60 to the other end. Figure 8In this embodiment, the main cavity 62 extends in a direction parallel to the Y-axis. In one implementation, the main cavity 62 is a stepped hole structure formed by a large hole 621 and a small hole 622, wherein the large hole 621 is located at the open end of the main cavity 62 and is used to connect with the valve connector 65. For example, the large hole 621 is a threaded hole, and the circumferential side of the valve connector 65 is provided with external threads. Through threaded connection, the valve connector 65 can be fixed in the large hole 621. The valve connector 65 is used to connect with the valve on the inflated object (e.g., a bicycle tire), thereby allowing airflow from the main cavity 62 to flow into the inflated object sequentially through the valve connector 65 and the valve, thus inflating the object.

[0044] In one embodiment, the direction of the airflow in the air chamber 41 parallel to the cylinder 40 (i.e., parallel to) Figure 8 In the X-axis direction, the body 601 of the air pipe 40 does not extend beyond the cylinder head 50. This is because the air pipe 40 is placed to the right of the motor 30 and below the cylinder body 44, creating a space for placement, so that the air pipe 40 is basically flush with the cylinder head 50 (from the X-axis direction). Figure 8 It can be seen that only a very small part of the air pipe 40 protrudes slightly from the cylinder head 50.

[0045] The first branch cavity 63 is connected to the connecting cavity 51 (specifically, the through hole 55). Figure 8 From the displayed perspective, both the first cavity 63 and the through hole 55 extend approximately parallel to the Y-axis. The end of the air pipe 60 opposite to the nozzle connector 65 is provided with positioning holes 66 corresponding to the protrusions 53 of the cylinder head 50. The protrusions 53 are respectively received in the corresponding positioning holes 66. Through the cooperation of the protrusions 53 and the positioning holes 66, the air pipe 60 is positioned relative to the cylinder head 50, thus facilitating the user to fix the air pipe 60 to the cylinder head 50 with screws. Furthermore, it is understood that to prevent air leakage, the aforementioned intermediate protrusion 53 is sealed and engaged in its corresponding positioning hole 66. For example, an elastic sealing ring (e.g., an O-ring) is provided between the intermediate protrusion 53 and the positioning hole 66, thereby preventing air leakage when airflow flows from the through hole 55 of the cylinder head 50 into the air pipe 60.

[0046] In one embodiment, the circumferential outer surface of the cylinder body 44 has a rib 46 extending along its length (see...). Figure 8 The connection portion 602 of the air pipe 60 includes a guide groove 603 (see...). Figure 7 For example, by providing two spaced-apart protruding walls 604 on the connecting part 602 (see... Figure 7A guide groove 603 is formed, and the protruding rib 46 is received in the guide groove 603. In this way, through the cooperation of the protruding rib 46 and the guide groove 603, the air tube 60 can be supported and pre-positioned, which facilitates the fixing operation of the operator during assembly.

[0047] In one embodiment, the corresponding connecting cavity 51 passes through the middle protrusion 53 of the three protrusions 53, and the first branch cavity 63 extends from the bottom of the middle positioning hole 66 of the three positioning holes 66 to the other end of the trachea 60.

[0048] In one embodiment, the first branch cavity 63 and the main cavity 62 (specifically, the small hole 622) are connected through the second branch cavity 64. The second branch cavity 64 extends from its end where it intersects with the first branch cavity 63 toward the motor 30 until it connects with the main cavity 62 (specifically, the small hole 622). Figure 8 From the displayed perspective, the second branch chamber 64 extends approximately parallel to the X-axis. Since the cylinder head 50 is located at one end of the cylinder 40 along its length, if the connecting chamber 51 is directly opposite the main chamber 62, it means that the air pipe 60 needs to be... Figure 8 The displayed position is shifted to the right by a certain distance, which will obviously increase the position of the movement assembly 20 parallel to the Figure 8 The length along the X-axis in the trachea. Therefore, the arrangement of the second branch 64 facilitates full utilization of the trachea 60. Figure 8 The right side of the motor 30 and the lower part of the cylinder body 44 form a placement space, which is conducive to the miniaturization of the core assembly 20.

[0049] Figure 8 The dashed lines indicate the airflow path. Specifically, when the motor 30 is working, the motor shaft 31 rotates, driving the connecting block 32 to rotate. The connecting block 32 then drives the piston rod 43 to swing, and the piston rod 43 drives the piston 42 to move repeatedly in the air chamber 41. When the piston 42 moves towards the cylinder head 50, it pushes air to move in the air chamber 41. The air then enters the shallow hole 54 of the cylinder head 50 through the through hole 444 of the end wall 442 of the cylinder 40, and then flows into the through hole 55 from the shallow hole 54. After that, the air flows through the through hole 55 sequentially through the small hole 622 of the first branch chamber 63, the second branch chamber 64, and the main chamber 62, and finally flows into the inflated object through the air nozzle connector 65 and the air nozzle of the inflated object.

[0050] from Figure 8The dashed lines indicate the airflow path. It can be seen that the air chamber 41 forms a first airflow channel extending along a first direction (i.e., parallel to the X-axis), while the second airflow channel formed by the connecting cavity 51 and the airflow channel 61 is a non-linear airflow channel, extending along a direction intersecting the first direction. Guided by the first and second airflow channels, after the airflow flows from the air chamber 41 into the connecting cavity 51, its flow direction undergoes a first turn (turning angle of 90 degrees). After the airflow flows from the first branch cavity 63 into the second branch cavity 64, its flow direction undergoes a second turn (turning angle of 90 degrees). After the airflow flows from the second branch cavity 64 into the main cavity 62, its flow direction undergoes a third turn (turning angle of 90 degrees).

[0051] In one embodiment, the electric inflation device 100 also includes a temperature sensor. In another embodiment, the temperature sensor is disposed on the side of the partition 132 of the bracket 13 facing the battery 70. The temperature sensor is electrically connected to the circuit board 80 and is used to detect the temperature of the battery 70, which is displayed to the user via the display module 81, allowing the user to know the real-time temperature of the battery 70. In one embodiment, when the temperature of the battery 70 exceeds a preset value, the control module on the circuit board 70 sends a warning message to the user via the display module 81.

[0052] In one embodiment, the electrically operated inflation device 100 further includes a pressure sensor 90. The air tube 60 also includes a third branch chamber 67 communicating with the main chamber 62 (see...). Figure 7 The mechanism assembly 20 also includes a cover 68 that covers the third branch cavity 67. The pressure sensor 90 is disposed on the cover 68, thereby positioning the pressure sensor 90 within the third branch cavity 67. The third branch cavity 67 is located within the body 601 of the air tube 60, and is connected via a connecting hole 69 (see...). Figure 8The third chamber 67 is interconnected with the main chamber 62. Through this structure, the air pressure in the third chamber 67 is always the same as the air pressure in the main chamber 62, and the air pressure sensor 90 located in the third chamber 67 can detect the air pressure in the main chamber 62 in real time. The air pressure sensor 90 is electrically connected to the circuit board 80, and the air pressure value detected by the air pressure sensor 90 is displayed to the user through the display module 81. Understandably, the cover 68 can be connected to the air pipe 60 by screws, and a flexible sealing ring can be provided between the cover 68 and the body 601 of the air pipe 60 to prevent air leakage, make full use of space, and facilitate maintenance. Understandably, wherever airflow passes, a sealing structure needs to be provided between two connected components to prevent air leakage, for example, between the piston 42 and the inner wall of the air chamber 41, between the cylinder head 50 and the cylinder body 44, and between the air nozzle connector 65 and the body 601 of the air pipe 60. The sealing structure can be selected from existing suitable sealing structures as needed, and will not be detailed here.

[0053] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this utility model.

Claims

1. An electric inflation device, characterized in that, include: shell; and The mechanism assembly is disposed inside the housing and includes: a motor, a cylinder connected to the motor, and an air pipe connected to the cylinder. The cylinder includes an air chamber, and the air pipe includes an airflow channel. The air chamber and the airflow channel are connected, and the airflow channel is configured to guide the airflow from the air chamber to change its flow direction.

2. The electric inflation device according to claim 1, characterized in that, The cylinder includes a cylinder body and a cylinder head connected to the cylinder body. The air chamber is disposed in the cylinder body, and the cylinder head includes a communicating cavity that communicates with the air chamber and the airflow passage.

3. The electric inflation device according to claim 2, characterized in that, The mechanism assembly also includes a piston and piston rod housed in the air chamber, the piston being connected to a first end of the piston rod, the cylinder head being connected to one end of the cylinder body and facing the piston, and the motor shaft of the motor being connected to a second end of the piston rod opposite to the first end.

4. The electric inflation device according to claim 1, characterized in that, The motor and the air pipe are located on the same side of the cylinder.

5. The electric inflation device according to claim 2, characterized in that, The air pipe includes a body and a connecting portion connected to the body. The airflow channel includes a main cavity, a first branch cavity, and a second branch cavity. The main cavity and the second branch cavity are disposed in the body. The first branch cavity is disposed in the connecting portion and is connected to the communicating cavity of the cylinder head. The first branch cavity and the main cavity are connected through the second branch cavity. The extension direction of the second branch cavity is different from the extension direction of the main cavity and the first branch cavity. In a direction parallel to the flow direction of the airflow in the cylinder chamber, the body of the air pipe does not extend beyond the cylinder head.

6. The electric inflation device according to claim 5, characterized in that, The main body of the trachea also includes a third branch cavity communicating with the main cavity, and the mechanism assembly also includes a cover covering the third branch cavity and a pressure sensor disposed on the cover.

7. The electric inflation device according to claim 1, characterized in that, It also includes a bracket disposed inside the housing, and the movement assembly is fixed to a first side of the bracket.

8. The electric inflation device according to claim 7, characterized in that, It also includes a battery fixed to a first side of the bracket, the first side of which has a protruding partition located between the battery and the movement assembly to separate the battery and the movement assembly.

9. The electric inflation device according to claim 8, characterized in that, It also includes a circuit board, which is fixed to a second side of the bracket opposite to the first side.

10. The electric inflation device according to claim 5, characterized in that, The connecting part of the air tube is provided with a positioning hole communicating with the first branch cavity. The cylinder head includes a protrusion facing the connecting part of the air tube. The communicating cavity of the cylinder head passes through the protrusion, and the protrusion and the positioning hole are sealed and engaged.

11. The electric inflation device according to claim 2, characterized in that, The cylinder body has a rib protruding from its circumferential outer side. The air pipe includes a body and a connecting part connected to the body. The connecting part includes a guide groove, and the rib is received in the guide groove.

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