Inflator pump

Abstract

The utility model relates to the technical field of daily necessities, in particular to an inflator pump which comprises a main body and an inflation portion arranged on the outer surface of the main body in a protruding mode, the main body is hollow to form a cavity, an air outlet is formed in the end, away from the main body, of the inflation portion, and the inflation portion is hollow to form an airflow channel communicated with the cavity and the air outlet. A one-way air inlet is further formed in the side wall of the inflation part, and an included angle is formed between the air inlet direction of the one-way air inlet and the air outlet direction of the airflow channel and is larger than 90 degrees and smaller than 180 degrees. According to the inflator pump, the air outlet and the one-way air inlet are formed in the inflation portion in a concentrated mode, the flowing direction of air can be controlled more effectively, inflation efficiency is improved, and meanwhile the included angle between the air inlet direction of the one-way air inlet and the air outlet direction of the air flow channel is larger than 90 degrees and smaller than 180 degrees. The one-way air inlet is formed in the airflow channel and forms a certain windward angle, air leakage can be effectively prevented, and the inflation efficiency is further improved.

Description

[Technical field]

[0001] The utility model relates to the technical field of daily necessities, in particular to an air pump. [Background technology]

[0002] Various inflatable devices, such as inflatable neck pillows, have become common comfortable rest equipment. However, traditional inflatable devices are not convenient to store and carry, and require a separate air pump. Although some inflatable devices are equipped with an air pump, there are still some problems during the inflation process, such as easy leakage and low inflation efficiency, which affect the user experience and convenience. Therefore, designing an air pump with a more reasonable structure and more powerful functions is one of the current technical challenges. [Contents of the utility model]

[0003] In order to solve the technical problems of easy air leakage and low air filling efficiency in the existing air pumps, the utility model provides an air pump.

[0004] The solution to the technical problem of the utility model is to provide an air pump, comprising a main body and an air-filling part protruding from the outer surface of the main body, the main body is hollow to form a cavity, an air outlet is provided at one end of the air-filling part away from the main body, the air-filling part is hollow to form an air flow channel connecting the cavity and the air outlet; a one-way air inlet is also provided on the side wall of the air-filling part, an air inlet direction of the one-way air inlet and an air outlet direction of the air flow channel form an angle, and the angle is greater than 90° and less than 180°.

[0005] Preferably, a boss is provided on the inner wall of the inflation portion corresponding to the one-way air inlet, the boss is hollow to form an air inlet channel connecting the air inlet and the air flow channel, and the central axis of the air inlet channel is inclined toward the cavity.

[0006] Preferably, a one-way air valve is provided in the air intake passage.

[0007] Preferably, the one-way air valve comprises a hollow part and an umbrella-shaped part limited on the hollow part.

[0008] Preferably, the surface of the boss is inclined toward one side of the cavity, and the hollow piece is arranged parallel to the surface of the boss.

[0009] Preferably, the main body comprises a top cover and a bottom cover which are detachably connected, and the cavity is formed by enclosing the top cover and the bottom cover.

[0010] Preferably, an annular protrusion is provided on one of the top cover and the bottom cover, and an annular groove matching with the annular protrusion is provided on the other cover, and when the top cover and the bottom cover are connected, the annular protrusion is snapped into the annular groove.

[0011] Preferably, the inflatable portion is integrally formed with one of the top cover or the bottom cover.

[0012] Preferably, the air outlet is detachably connected to a protective cover.

[0013] Preferably, a detachable wrapping layer is provided on the outside of the main body, and a hanging rope is provided on the wrapping layer.

[0014] Compared with the prior art, the air pump provided by the utility model has the following advantages:

[0015] 1. The air pump provided in the embodiment of the utility model can store inflatable equipment such as an inflatable neck pillow in the cavity, which solves the problem of inconvenient storage of inflatable equipment. The air outlet and the one-way air inlet are centrally arranged in the inflation part, which can more effectively control the flow direction of the gas and avoid confusion of the gas between the inlet and outlet. In this way, the air pump can be more efficient during the inflation process, quickly send the gas into the cavity, and prevent the backflow of the gas, thereby improving the inflation efficiency. The air inlet direction of the one-way air inlet and the air outlet direction of the air flow channel form an angle greater than 90° and less than 180°, so that the one-way air inlet is arranged at the position of the air flow channel and presents a certain windward angle. When the main body is pressed to inflate the inflatable equipment, the gas in the cavity will flow to the air flow channel in a concentrated manner, and the air flow pressure will quickly close the one-way air inlet to prevent leakage, further improving the inflation efficiency.

[0016] 2. The air pump provided in the embodiment of the utility model has a boss arranged on the inner wall of the air-filled part and a hollow arrangement to form an air inlet channel connecting the air inlet and the air flow channel, which promotes the smooth entry of gas into the cavity and optimizes the inflation performance. The central axis of the air inlet channel is inclined toward the cavity, and the inclined air inlet channel can reduce the resistance during gas flow, further prevent air leakage and improve inflation efficiency. It can also better distribute the gas evenly into the cavity, and the gas flows more smoothly in the channel, and is less likely to generate turbulence or eddy currents, thereby reducing the generation of noise and vibration.

[0017] 3. The one-way air valve structure composed of the hollow part and the umbrella-shaped part of the air pump provided in the embodiment of the utility model can control the direction of airflow. When using the air pump to inflate, the umbrella-shaped part can play a good sealing role to prevent air leakage, thereby effectively improving the inflation efficiency. When the user stops applying pressure to the air pump, the one-way air valve opens, and the airflow enters the cavity through the hollow part through the air inlet channel. The air pump can replenish air in time, making full preparations for the next squeeze inflation, thereby further improving the inflation efficiency of the air pump.

[0018] 4. In the air pump provided in the embodiment of the utility model, the table top of the boss is tilted toward one side of the cavity, and the hollow part is arranged parallel to the table top of the boss, so as to further optimize the smoothness and efficiency of gas entering the cavity.

[0019] 5. The detachable design of the top cover and bottom cover of the air pump provided in the embodiment of the utility model is convenient for users to store the inflatable equipment, and is also convenient for cleaning and maintenance of the air pump. The design of the annular protrusion being connected to the annular groove makes the connection between the two more reliable. The bottom cover and the top cover will not be easily opened during the inflation operation, and have a certain sealing performance. Its good elasticity and sealing performance greatly improve the inflation efficiency and are easy to use.

[0020] 6. In the air pump provided in the embodiment of the utility model, the air pump part is integrally formed with the top cover or the bottom cover. This design can eliminate the gap and looseness at the connection between the air pump part and the main body, so that the overall structure of the air pump has better sealing performance and will not leak when inflated. It can also reduce the number of parts, simplify the process flow, and save costs.

[0021] 7. The protective cover of the air pump provided in the embodiment of the utility model is used to protect the air outlet from damage, extend the service life, and prevent dust and debris from entering. Especially when the cavity contains a device to be inflated, the cleanliness of the inflatable device can be ensured.

[0022] 8. The air pump provided in the embodiment of the utility model has a wrapping layer that can protect the main body from damage by the external environment, and a hanging rope that is convenient for users to carry, thereby increasing convenience. At the same time, patterns or shapes can be added to the wrapping layer to increase the overall aesthetics.

Brief Description of the Drawings

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0024] Figure 1 It is a three-dimensional schematic diagram of the air pump provided by the first embodiment of the utility model.

[0025] Figure 2 The cross-sectional view of the air pump provided by the first embodiment of the utility model is Figure 1 .

[0026] Figure 3 The cross-sectional view of the air pump provided by the first embodiment of the utility model is Figure 2 .

[0027] Figure 4 The cross-sectional view of the air pump provided by the first embodiment of the utility model is Figure 3 .

[0028] Figure 5 yes Figure 2 A is an enlarged view of the middle image.

[0029] Figure 6 It is a three-dimensional schematic diagram of a hollow part of an air pump provided in the first embodiment of the utility model.

[0030] Figure 7 It is a three-dimensional schematic diagram of an umbrella-shaped member of an air pump provided in the first embodiment of the utility model.

[0031] Figure 8 It is an exploded schematic diagram of the air pump provided in the first embodiment of the utility model.

[0032] Fig. 9 It is a three-dimensional schematic diagram of the air pump provided by the first embodiment of the utility model including a wrapping layer.

[0033] Description of the accompanying drawings:

[0034] 1. Air pump;

[0035] 10. Main body; 11. Inflatable part; 12. One-way air valve; 13. Protective cover; 14. Wrapping layer;

[0036] 100, top cover; 101, bottom cover; 102, cavity; 110, air outlet; 111, air flow channel; 112, one-way air inlet; 113, boss; 114, air inlet channel; 115, table; 120, hollow part; 121, umbrella-shaped part; 141, hanging rope;

[0037] 1001, annular protrusion; 1011, annular groove; 1201, ventilation hole; 1202, limiting hole; 1211, umbrella surface; 1212, umbrella handle; 1213, limiting protrusion. [Specific implementation method]

[0038] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below with reference to the accompanying drawings and implementation examples. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0039] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0040] In the present invention, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings. These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0041] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in this utility model can be understood according to specific circumstances.

[0042] In addition, the terms "installed", "set", "provided with", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0043] Please combine Figure 1 , Figure 2 and Figure 3 The first embodiment of the utility model provides an air pump 1, including a main body 10 and an air-filling portion 11 protruding from the outer surface of the main body 10, and the main body 10 is hollow to form a cavity 102.

[0044] It can be understood that the inflatable part 11 is convexly arranged on the outer surface of the main body 10 and an air outlet 110 is provided at one end away from the main body 10, forming a convex mouth, so that the air outlet 110 can be inserted into the inflatable valve of the inflatable device to be inflated to prevent air leakage. The cavity 102 can accommodate the inflatable device, such as an inflatable neck pillow, an inflatable cushion, etc., so that the inflatable pump 1 can not only play an inflating role, but also serve as a container for storing items, solving the problem of inconvenient storage of inflatable devices and increasing portability.

[0045] It can be understood that the air pump 1 inflates the inflatable device by pressing the main body 10. Therefore, the main body 10 should be an elastomer at least partially made of elastic material, and the elastic material can be any one of silicone, rubber or other elastic materials.

[0046] Furthermore, an air outlet 110 is provided at one end of the air-filled portion 11 away from the main body 10, and the air-filled portion 11 is hollow to form an air flow channel 111 connecting the cavity 102 and the air outlet 110. A one-way air inlet 112 is also provided on the side wall of the air-filled portion 11, and the air inlet direction of the one-way air inlet 112 and the air outlet direction of the air flow channel 111 form an angle α (such as Figure 3 The angle α) is greater than 90° and less than 180°.

[0047] It can be understood that the gas outlet 110 and the one-way gas inlet 112 are centrally arranged in the gas-filled part 11, which can more effectively control the flow direction of the gas and avoid the gas from being confused between the inlet and outlet. In this way, the gas pump 1 can be more efficient during the inflation process, quickly deliver the gas into the gas-filled part 11, and prevent the backflow of the gas, thereby improving the inflation efficiency. The space of the gas-filled part 11 can also be effectively utilized, making the structure of the gas-filled part 11 more compact, convenient for processing and manufacturing, and cost-saving.

[0048] The angle α between the air inlet direction of the one-way air inlet 112 and the air outlet direction of the airflow channel 111 is greater than 90° and less than 180°, so that the one-way air inlet 112 is set at the position of the airflow channel 111 and presents a certain windward angle. When the main body 10 is pressed to inflate the inflatable device, the gas in the cavity 102 will flow concentratedly to the airflow channel 111. At the same time, the airflow pressure will quickly close the one-way air inlet 112 to prevent air leakage, thereby further improving the inflation efficiency.

[0049] Please continue reading Figure 4 The inner wall of the inflation portion 11 is provided with a boss 113 corresponding to the one-way air inlet 112. The boss 113 is hollow to form an air inlet channel 114 connecting the one-way air inlet 112 and the air flow channel 111. The central axis X of the air inlet channel 114 (such as Figure 4 The X) is inclined toward the cavity 102.

[0050] It can be understood that the arrangement of the boss 113 and the air inlet passage 114 can facilitate the smooth entry of gas into the cavity 102 , reduce the turbulence and resistance of the air flow, improve the efficiency of air flow, and optimize the inflation performance.

[0051] The central axis X of the air inlet channel 114 is inclined toward the cavity 102, further ensuring that the airflow direction of the air inlet is toward one side of the cavity 102. The inclined air inlet channel 114 can reduce the resistance of the gas flow, because the gas flow path in the inclined channel is smoother and will not be subject to excessive friction and obstruction, which can improve the charging efficiency. It can also better distribute the gas evenly into the cavity 102, and the gas flows more smoothly in the channel, and is less likely to generate turbulence or eddy currents, thereby reducing the generation of noise and vibration.

[0052] Please continue to combine Figure 5, Figure 6 and Figure 7 A one-way air valve 12 is disposed in the air inlet passage 114. The one-way air valve 12 includes a hollow part 120 and an umbrella-shaped part 121 limited on the hollow part 120.

[0053] It can be understood that the one-way air valve 12 structure composed of the hollow piece 120 and the umbrella-shaped piece 121 can play a role in controlling the direction of airflow. When using the air pump 1 to inflate, the umbrella-shaped piece 121 can play a good sealing role to prevent air leakage, thereby effectively improving the inflation efficiency. When the user stops applying pressure to the air pump 1, the one-way air valve 12 opens, and the airflow passes through the air inlet channel 114 via the hollow piece 120 into the cavity 102, so that the air pump 1 can replenish air in time and be fully prepared for the next squeeze inflation, thereby further improving the inflation efficiency of the air pump 1.

[0054] Specifically, in this embodiment, the hollow member 120 can be provided separately or integrally formed with the boss 113. The umbrella-shaped member 121 includes an umbrella surface 1211 and an umbrella handle 1212 connected to the umbrella surface 1211. The umbrella-shaped member 121 is movably connected to the hollow member 120 through the umbrella handle 1212. The umbrella handle 1212 is also provided with a limiting protrusion 1213. The umbrella surface 1211 and the limiting protrusion cooperate to limit the position of the umbrella-shaped member 121. The hollow member 120 is provided with at least one air vent 1201 for air circulation and a limiting hole 1202 for fixing the umbrella handle 1212. When the main body 10 of the air pump 1 is pressed to perform the inflation operation, the air pressure in the cavity 102 changes, so that there is an air pressure difference between the air pressure in the cavity 102 and the external atmospheric pressure. The umbrella-shaped member 121 moves relative to the hollow member 120 under the force generated by the air pressure difference, thereby realizing the opening or closing of the one-way air valve 12.

[0055] It can be understood that when the cavity 102 is compressed under the action of external force, the internal air pressure of the cavity 102 is greater than the atmospheric pressure. At this time, the umbrella-shaped member 121 is subjected to a thrust from the inside to the outside. Under the action of the thrust, the umbrella surface 1211 of the umbrella-shaped member 121 finally clings to the hollow member 120, sealing the one-way air inlet 112, so that all the gas in the cavity 102 flows out from the air outlet 110, thereby preventing air leakage and improving the inflation efficiency. When the air pump 1 loses the action of external force, the elastic air pump 1 returns to its original form under the action of the rebound force. At this time, the internal air pressure in the cavity 102 decreases, and the external atmospheric pressure is higher than the internal air pressure, so that the umbrella-shaped member 121 is subjected to a force from the outside to the inside. Under the influence of this force, the umbrella-shaped member 121 moves toward the inside of the cavity 102 until the limiting protrusion 1213 and the hollow member 120 are against each other. At this time, the umbrella cover 1211 is separated from the hollow member 120, and the external air flows into the cavity 102 from the opening on the hollow member 120 through the one-way air inlet 112, so that the cavity 102 is filled with air again.

[0056] Please continue reading Figure 4 The table 115 of the boss 113 is tilted toward one side of the cavity 102 , and the hollow piece 120 is arranged parallel to the table 115 of the boss 113 , so as to further optimize the smoothness and efficiency of the gas entering the cavity 102 .

[0057] Please combine Figure 2 and Figure 8 The main body 10 includes a top cover 100 and a bottom cover 101 that are detachably connected, and the cavity 102 is formed by enclosing the top cover 100 and the bottom cover 101 .

[0058] It can be understood that the detachable design of the top cover 100 and the bottom cover 101 makes it convenient for users to store the inflatable device and also facilitates the cleaning and maintenance of the air pump 1 .

[0059] Furthermore, one of the top cover 100 and the bottom cover 101 is provided with an annular protrusion 1001 , and the other is provided with an annular groove 1011 matching with the annular protrusion 1001 . When the top cover 100 and the bottom cover 101 are connected, the annular protrusion 1001 is snapped into the annular groove 1011 .

[0060] It can be understood that the design of the annular protrusion 1001 being snapped into the annular slot makes the connection between the two more reliable. During the inflation operation, the bottom cover 101 and the top cover 100 will not be easily opened and have a certain degree of sealing. Its good elasticity and sealing greatly improve the inflation efficiency and make it easy to use.

[0061] Furthermore, the inflation part 11 is integrally formed with one of the top cover 100 or the bottom cover 101. This design can eliminate the gap and looseness at the connection between the inflation part 11 and the main body 10, so that the overall structure of the inflation pump 1 is better sealed and will not leak during inflation. It can also reduce the number of parts, simplify the process flow, and save costs.

[0062] Furthermore, the air outlet 110 is detachably connected to a protective cover 13. In this embodiment, the connection method between the protective cover 13 and the air outlet 110 is not specifically limited, and can be piston matching, threaded connection, etc. The protective cover 13 is used to protect the air outlet 110 from damage, extend the service life of the device, and prevent dust and debris from entering, especially when the cavity 102 contains a device to be inflated, the cleanliness of the inflatable device can be ensured.

[0063] Please read further Fig. 9 The main body 10 is provided with a detachable wrapping layer 14 on the outside, and a hanging rope 141 is provided on the wrapping layer 14. The wrapping layer 14 can protect the main body 10 from damage by the external environment, and the hanging rope 141 is convenient for users to carry, thereby increasing convenience. At the same time, patterns or shapes can be added to the wrapping layer 14 to increase the overall aesthetics of the air pump 1.

[0064] Specifically, in the present embodiment, the wrapping layer 14 only wraps the main body 10, and the air outlet 110 and the one-way air inlet 112 on the inflation part 11 are both outside the wrapping layer 14, and the wrapping layer 14 will not affect the inflation operation of the air pump 1. The detachable design of the wrapping layer 14 can be achieved by setting a zipper, buttons, etc., so that the wrapping layer 14 can be opened conveniently to replace the wrapping layer 14 of different shapes and materials. The hanging rope 141 is detachably connected to the wrapping layer 14 to meet the different needs of users and is convenient to carry. In the present embodiment, the shape and size of the protective cover 13 are not specifically limited. While the protective cover 13 matches the air outlet, it can cooperate with the wrapping layer 14 to achieve different shapes to increase the overall aesthetics of the air pump 1.

[0065] Compared with the prior art, the air pump provided by the utility model has the following advantages:

[0066] 1. The air pump provided in the embodiment of the utility model can store inflatable equipment such as an inflatable neck pillow in the cavity, which solves the problem of inconvenient storage of inflatable equipment. The air outlet and the one-way air inlet are centrally arranged in the inflation part, which can more effectively control the flow direction of the gas and avoid confusion of the gas between the inlet and outlet. In this way, the air pump can be more efficient during the inflation process, quickly send the gas into the cavity, and prevent the backflow of the gas, thereby improving the inflation efficiency. The air inlet direction of the one-way air inlet and the air outlet direction of the air flow channel form an angle greater than 90° and less than 180°, so that the one-way air inlet is arranged at the position of the air flow channel and presents a certain windward angle. When the main body is pressed to inflate the inflatable equipment, the gas in the cavity will flow to the air flow channel in a concentrated manner, and the air flow pressure will quickly close the one-way air inlet to prevent leakage, further improving the inflation efficiency.

[0067] 2. The air pump provided in the embodiment of the utility model has a boss arranged on the inner wall of the air-filled part and a hollow arrangement to form an air inlet channel connecting the air inlet and the air flow channel, which promotes the smooth entry of gas into the cavity and optimizes the inflation performance. The central axis of the air inlet channel is inclined toward the cavity, and the inclined air inlet channel can reduce the resistance during gas flow, further prevent air leakage and improve inflation efficiency. It can also better distribute the gas evenly into the cavity, and the gas flows more smoothly in the channel, and is less likely to generate turbulence or eddy currents, thereby reducing the generation of noise and vibration.

[0068] 3. The one-way air valve structure composed of the hollow part and the umbrella-shaped part of the air pump provided in the embodiment of the utility model can control the direction of airflow. When using the air pump to inflate, the umbrella-shaped part can play a good sealing role to prevent air leakage, thereby effectively improving the inflation efficiency. When the user stops applying pressure to the air pump, the one-way air valve opens, and the airflow enters the cavity through the hollow part through the air inlet channel. The air pump can replenish air in time, making full preparations for the next squeeze inflation, thereby further improving the inflation efficiency of the air pump.

[0069] 4. In the air pump provided in the embodiment of the utility model, the table top of the boss is tilted toward one side of the cavity, and the hollow part is arranged parallel to the table top of the boss, so as to further optimize the smoothness and efficiency of gas entering the cavity.

[0070] 5. The detachable design of the top cover and bottom cover of the air pump provided in the embodiment of the utility model is convenient for users to store the inflatable equipment, and is also convenient for cleaning and maintenance of the air pump. The design of the annular protrusion being connected to the annular groove makes the connection between the two more reliable. The bottom cover and the top cover will not be easily opened during the inflation operation, and have a certain sealing performance. Its good elasticity and sealing performance greatly improve the inflation efficiency and are easy to use.

[0071] 6. In the air pump provided in the embodiment of the utility model, the air pump part is integrally formed with the top cover or the bottom cover. This design can eliminate the gap and looseness at the connection between the air pump part and the main body, so that the overall structure of the air pump has better sealing performance and will not leak when inflated. It can also reduce the number of parts, simplify the process flow, and save costs.

[0072] 7. The protective cover of the air pump provided in the embodiment of the utility model is used to protect the air outlet from damage, extend the service life, and prevent dust and debris from entering. Especially when the cavity contains a device to be inflated, the cleanliness of the inflatable device can be ensured.

[0073] 8. The air pump provided in the embodiment of the utility model has a wrapping layer that can protect the main body from damage by the external environment, and a hanging rope that is convenient for users to carry, thereby increasing convenience. At the same time, patterns or shapes can be added to the wrapping layer to increase the overall aesthetics.

[0074] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An air pump, characterized in that: It includes a main body and an inflatable part protruding from the outer surface of the main body, the main body is hollow to form a cavity, the inflatable part is provided with an air outlet at one end away from the main body, and the inflatable part is hollow to form an air flow channel connecting the cavity and the air outlet; the side wall of the inflatable part is also provided with a one-way air inlet, the air inlet direction of the one-way air inlet and the air outlet direction of the air flow channel form an angle, and the angle is greater than 90° and less than 180°.

2. The air pump according to claim 1, characterized in that: The inner wall of the inflation portion is provided with a boss corresponding to the one-way air inlet, and the boss is hollow to form an air inlet channel connecting the air inlet and the air flow channel, and the central axis of the air inlet channel is inclined toward the cavity.

3. The air pump according to claim 2, characterized in that: A one-way air valve is arranged in the air intake passage.

4. The air pump according to claim 3, characterized in that: The one-way air valve comprises a hollow part and an umbrella-shaped part limited on the hollow part.

5. The air pump according to claim 4, characterized in that: The table top of the boss is tilted toward one side of the cavity, and the hollow piece is arranged parallel to the table top of the boss.

6. The air pump according to claim 1, characterized in that: The main body comprises a top cover and a bottom cover which are detachably connected, and the cavity is formed by enclosing the top cover and the bottom cover.

7. The air pump according to claim 6, characterized in that: One of the top cover and the bottom cover is provided with an annular protrusion, and the other is provided with an annular groove matched with the annular protrusion. When the top cover and the bottom cover are connected, the annular protrusion is clamped in the annular groove.

8. The air pump according to claim 7, characterized in that: The inflatable portion is integrally formed with one of the top cover or the bottom cover.

9. The air pump according to claim 1, characterized in that: The air outlet is detachably connected with a protective cover.

10. The air pump according to claim 1, characterized in that: A detachable wrapping layer is arranged outside the main body, and a hanging rope is arranged on the wrapping layer.

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