USB dc air pump

Abstract

The utility model aims at providing a kind of USB direct current air pump, it includes pump shell and electric drive component, first air port and second air port are set up on pump shell and are interconnected, electric drive component includes swivel block and air-blowing part, swivel block is rotationally arranged on pump shell, swivel block is provided with inclined push surface, air-blowing part is slidably arranged in pump shell, and air-blowing part is abutted with inclined push surface, air-blowing part has air inlet and air outlet, when swivel block is stressed rotation, to make one of the air inlet and air outlet of air-blowing part with first air port communication, another with second air port communication.

Description

Technical Field

[0001] This utility model relates to the technical field of air pumps, and in particular to a USB DC air pump. Background Technology

[0002] An air pump is a power device used to compress or transport gas, and is commonly used in products that require inflation, such as air mattresses.

[0003] Current air pumps mainly rely on a blower to drive the directional flow of gas, thus enabling them to inflate.

[0004] However, as people's demands increase, they not only need to inflate inflatable products quickly, but also to deflate them quickly. Existing air pumps are too limited in function and cannot meet people's needs for multi-functional air pumps that can inflate and deflate. Therefore, to address the above shortcomings, the USB DC air pump of this application is proposed. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a USB DC air pump with inflation and deflation functions.

[0006] The objective of this utility model is achieved through the following technical solution:

[0007] A USB DC air pump, comprising:

[0008] Pump casing, wherein a first air inlet and a second air inlet are provided on the pump casing and are interconnected; and

[0009] An electric drive assembly includes a rotary block and a blower. The rotary block is rotatably mounted on the pump housing and has an inclined pushing surface. The blower is slidably mounted inside the pump housing and abuts against the inclined pushing surface. The blower has an air inlet and an air outlet. When the rotary block is rotated under force, one of the air inlet and the air outlet of the blower communicates with the first air outlet, and the other communicates with the second air outlet.

[0010] Optionally, the rotating block includes a cap and a driving protrusion, the cap and the driving protrusion are connected to each other, and the cap is located outside the first air vent, the driving protrusion is located inside the first air vent, so that the rotating block rotates relative to the first air vent, and the inclined push surface is located on the driving protrusion.

[0011] Optionally, the electric drive assembly further includes a positioning block and a positioning spring. A plurality of positioning grooves are provided on the outer side wall of the drive protrusion. The positioning block is slidably disposed on the pump housing. The positioning spring abuts against the positioning block and the pump housing respectively. The positioning spring is used to push the positioning block so that the positioning block engages with at most one of the positioning grooves.

[0012] Optionally, the blower includes a blower housing, a motor, an impeller, a circuit board, and a top column. The blower housing is slidably disposed within the pump housing. A centrifugal air duct is formed within the blower housing. The air inlet and the air outlet are located at opposite ends of the centrifugal air duct and are located on the same side of the blower housing. The motor is disposed on the outer wall of the blower housing. The impeller is located within the centrifugal air duct and is connected to the output shaft of the motor. The circuit board is disposed on the outer wall of the blower housing and is electrically connected to the motor. The top column is disposed on the outer wall of the blower housing, and the end of the top column abuts against the inclined push surface.

[0013] Optionally, a switch is provided on the circuit board, and an activation protrusion is provided on the screw cap. When the screw cap rotates relative to the pump housing, the activation protrusion presses against or moves away from the switch.

[0014] Optionally, the blower housing is provided with a plurality of guide posts, and the pump housing is provided with a plurality of guide cylinders. Each guide post is correspondingly inserted into each of the guide cylinders, and each guide post is fitted with a top holding spring. The top holding spring is used to push the blower housing so that the top post abuts against the inclined pushing surface.

[0015] Optionally, a first valve frame is slidably disposed inside the second air outlet. A first valve plate is disposed on one end of the first valve frame located outside the pump housing. A first spring is sleeved on the first valve frame. The first spring is used to push the first valve frame so that the first valve frame drives the first valve plate to seal the second air outlet.

[0016] Optionally, the air inlet is provided with a top block, and the air outlet is provided with a clearance groove. When the air inlet is connected to the second air outlet, the top block pushes against the first valve frame, thereby causing the first valve plate to open the second air outlet. When the air outlet is connected to the second air outlet, the clearance groove avoids the first valve frame.

[0017] Optionally, a protective cover is provided on the outside of the second air vent.

[0018] Optionally, the pump casing is further provided with a third air outlet and a fourth air outlet that are interconnected, and the third air outlet and the fourth air outlet are independent of the first air outlet and the second air outlet. A second valve frame is slidably arranged on the fourth air outlet. A second valve plate is arranged on one end of the second valve frame located on the outside of the pump casing. A second spring is sleeved on the second valve frame. The second spring is used to push the second valve frame so that the second valve frame drives the second valve plate to seal the fourth air outlet.

[0019] Compared with the prior art, the present invention has at least the following advantages:

[0020] This utility model discloses a USB DC air pump, comprising a pump housing and an electric drive assembly. The pump housing has a first air inlet and a second air inlet that are interconnected. The electric drive assembly includes a rotary block and a blower. The rotary block is rotatably mounted on the pump housing and has an inclined pushing surface. The blower is slidably mounted inside the pump housing and abuts against the inclined pushing surface. The blower has an air inlet and an air outlet. When the rotary block is rotated under force, one of the air inlet and air outlet of the blower connects to the first air inlet, and the other connects to the second air inlet. Thus, by rotating the rotary block, the air pump's inflation and deflation functions can be changed. Compared to existing air pumps with only an inflation function, this one is more functional and easier to use. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of a USB DC air pump according to one embodiment of the present invention;

[0023] Figure 2 for Figure 1 The diagram shows the exploded structure of a USB DC air pump.

[0024] Figure 3 This is a schematic diagram of the structure of an electric drive assembly according to one embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of the structure of the rotating block according to one embodiment of the present invention;

[0026] Figure 5 This is a cross-sectional schematic diagram of a blower component according to one embodiment of the present invention;

[0027] Figure 6This is a schematic diagram of the structure of a blower component according to one embodiment of the present invention;

[0028] Figure 7 This is a schematic diagram of the internal structure of the pump casing according to one embodiment of the present invention;

[0029] Figure 8 This is a cross-sectional schematic diagram of the first valve holder according to one embodiment of the present invention;

[0030] Figure 9 for Figure 7 The diagram shows the structure of the pump casing from another angle;

[0031] Figure 10 for Figure 1 The diagram shows a cross-sectional view of the USB DC air pump.

[0032] Explanation of reference numerals in the attached figures:

[0033] 10. USB DC air pump; 100. Pump housing; 200. Electric drive assembly; 110. First air outlet; 120. Second air outlet; 210. Rotary block; 220. Blower; 2121. Angled push surface; 2211. Air inlet; 2212. Air outlet; 211. Screw cap; 212. Drive protrusion; 231. Positioning block; 232. Positioning spring; 2122. Positioning groove; 221. Blower housing; 222. Motor; 223. Impeller; 224. Wire 225. Road plate; 2213. Top column; 2214. Centrifugal air duct; 225. Switch; 2111. Starting protrusion; 226. Guide column; 130. Guide cylinder; 227. Top holding spring; 310. First valve frame; 320. First valve plate; 330. First spring; 2214. Top block; 22121. Clearance groove; 340. Protective cover; 140. Third air outlet; 150. Fourth air outlet; 410. Second valve frame; 420. Second valve plate; 430. Second spring. Detailed Implementation

[0034] To facilitate understanding of this utility model, a more comprehensive description will be provided below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model.

[0035] like Figure 1 and Figure 2As shown, a USB DC air pump 10 includes a pump housing 100 and an electric drive assembly 200. The pump housing 100 has a first air inlet 110 and a second air inlet 120 that are interconnected. The electric drive assembly 200 includes a rotary block 210 and a blower 220. The rotary block 210 is rotatably mounted on the pump housing 100 and has an inclined push surface 2121. The blower 220 is slidably mounted inside the pump housing 100 and abuts against the inclined push surface 2121. The blower 220 has an air inlet 2211 and an air outlet 2212. When the rotary block 210 is rotated under force, one of the air inlet 2211 and the air outlet 2212 of the blower 220 is connected to the first air inlet 110 and the other is connected to the second air inlet 120.

[0036] It should be noted that the pump housing 100 can be made of any material, for example, it can be made of plastic. The first air vent 110 and the second air vent 120 are formed on the pump housing 100. The first air vent 110 and the second air vent 120 can be located at any position on the pump housing 100 as needed, as long as they are connected internally within the pump housing 100. Further, one of the first air vent 110 and the second air vent 120 is used to connect to the outside, and the other is used to connect to the inflatable product. In this application, an example is provided where the first air vent 110 connects to the outside and the second air vent 120 connects to the inflatable product. In this application, an example is provided where the first air vent 110 is located on the top surface of the pump housing 100 and the second air vent 120 is located on the side surface of the pump housing 100. Further, the rotating block 210 can rotate relative to the pump housing 100. The blower 220 is slidably mounted inside the pump housing 100 and abuts against the inclined push surface 2121 of the rotary block 210. The blower 220 has an air inlet 2211 and an air outlet 2212. The blower 220 drives gas to enter the blower 220 through the air inlet 2211 and then flows out through the air outlet 2212, meaning the gas flows directionally under the driving force of the blower 220. Thus, by applying torque to the rotary block 210 to make it rotate, the inclined push surface 2121 pushes against the blower 220, thereby connecting one of the air inlet 2211 and the air outlet 2212 to the first air outlet 110 and the other to the second air outlet 120. Specifically, when the air inlet 2211 is connected to the first air outlet 110, the air outlet 2212 is connected to the second air outlet 120. At this time, the gas flow path is as follows: first air outlet 110, air inlet 2211, air outlet 2212, second air outlet 120. The air pump is in a charging state at this time. When air inlet 2211 is connected to second air outlet 120, then air outlet 2212 is connected to first air outlet 110. Alternatively, the gas flow path is as follows: second air outlet 120, air inlet 2211, air outlet 2212, first air outlet 110. The air pump is in a discharging state at this time. Thus, by rotating the rotary block 210, the charging and discharging functions of the air pump can be changed. Compared to existing air pumps with only a single charging function, this is more functional and easier to use.

[0037] like Figure 1 and Figure 2 As shown, in one embodiment, the rotating block 210 includes a rotating cap 211 and a driving protrusion 212. The rotating cap 211 and the driving protrusion 212 are connected to each other, and the rotating cap 211 is located on the outside of the first air vent 110, while the driving protrusion 212 is located on the inside of the first air vent 110, so that the rotating block 210 rotates relative to the first air vent 110, and the inclined push surface 2121 is located on the driving protrusion 212.

[0038] It should be noted that the cap 211 is located on the outside of the first air vent 110, and the cap 211 is for the user to hold and rotate. To ensure that the gas can flow smoothly through the first air vent 110, the cap 211 has a hollow structure. The drive protrusion 212 is located inside the pump housing 100, and the drive protrusion 212 is engaged with the cap 211. For example, the cap 211 is provided with several locking platforms, and the drive protrusion 212 is provided with several locking holes. The locking platforms engage with the locking holes respectively, so that the drive protrusion 212 and the cap 211 are engaged and fixed, and the drive protrusion 212 and the cap 211 are respectively located on both sides of the first air vent 110. Finally, by rotating the cap 211, the drive protrusion 212 can be rotated, so that the inclined push surface 2121 abuts against the blower 220, pushing the blower 220 to slide relative to the pump housing 100, so that one of the air inlet 2211 and the air outlet 2212 of the blower 220 is connected to the first air outlet 110 and the other is connected to the second air outlet 120.

[0039] like Figure 3 and Figure 4 As shown, in one embodiment, the electric drive assembly 200 further includes a positioning block 231 and a positioning spring 232. A plurality of positioning grooves 2122 are provided on the outer side wall of the drive protrusion 212. The positioning block 231 is slidably disposed on the pump housing 100. The positioning spring 232 abuts against the positioning block 231 and the pump housing 100 respectively. The positioning spring 232 is used to push the positioning block 231 so that the positioning block 231 engages with at most one of the positioning grooves 2122.

[0040] It should be noted that the USB DC air pump 10 of this application needs to have three working states: inflation, deflation, and stop. Therefore, the cap 211 should have three stop states. In order to facilitate feedback to the user that the cap 211 has been rotated to the correct position, the above structure is set. Specifically, three positioning grooves 2122 are provided on the outer wall of the drive protrusion 212. The positioning spring 232 pushes the positioning block 231 close to the drive protrusion 212. When the cap 211 drives the drive protrusion 212 to rotate, when the cap 211 is rotated to the position indicating the inflation, deflation, and stop states, the corresponding positioning groove 2122 is aligned with the positioning block 231. The positioning spring 232 pushes the positioning block 231 into the corresponding positioning groove 2122. Therefore, the user will hear a "click" sound as a feedback signal that the cap 210 has been rotated to the corresponding position, which means that the cap 210 has been rotated to the correct position.

[0041] like Figure 2 , Figure 3 , Figure 5 and Figure 6As shown, in one embodiment, the blower component 220 includes a blower housing 221, a motor 222, an impeller 223, a circuit board 224, and a top column 225. The blower housing 221 is slidably disposed within the pump housing 100. A centrifugal air duct 2213 is formed inside the blower housing 221. An air inlet 2211 and an air outlet 2212 are located at opposite ends of the centrifugal air duct 2213, and the air inlet 2211 and the air outlet 2212 are located within the blower housing 221. On the same side, the motor 222 is disposed on the outer wall of the blower housing 221, the impeller 223 is located in the centrifugal air duct 2213 and the impeller 223 is connected to the output shaft of the motor 222, the circuit board 224 is disposed on the outer wall of the blower housing 221 and the circuit board 224 is electrically connected to the motor 222, and the top column 225 is disposed on the outer wall of the blower housing 221 and the end of the top column 225 abuts against the inclined push surface 2121.

[0042] It should be noted that the blower housing 221 has a centrifugal air duct 2213 inside, and the impeller 223 is located inside the centrifugal air duct 2213. The motor 222 is fixedly installed on the bottom side of the blower housing 221, and the output shaft of the motor 222 extends into the centrifugal air duct 2213, so that the impeller 223 can be installed on the output shaft of the motor 222. The circuit board 224 and the top column 225 are both installed on the top side of the blower housing 221, and the top column 225 abuts against the inclined push surface 2121. Thus, when the rotating block 210 rotates, the inclined push surface 2121 will push the top column 225. Since the inclined push surface 2121 is an inclined structure, when the end face of the top column 225 is always in contact with the inclined push surface 2121, the blower component 220 moves up and down relative to the pump housing 100 as a whole, so that one of the air inlet 2211 and the air outlet 2212 is connected to the first air outlet 110 and the other is connected to the second air outlet 120.

[0043] like Figures 2 to 6 As shown, in one embodiment, a switch 226 is provided on the circuit board 224, and a starting protrusion 2111 is provided on the screw cap 211. When the screw cap 211 rotates relative to the pump housing 100, the starting protrusion 2111 presses against or moves away from the switch 226.

[0044] It should be noted that when the rotating block 210 is rotated into position, the starting protrusion 2111 will press the switch 226, thereby causing the motor 222 to be started randomly, so that the USB DC air pump 10 can inflate or deflate.

[0045] like Figure 2 , Figure 6 and Figure 7As shown, in one embodiment, a plurality of guide posts 227 are provided on the blower housing 221, and a plurality of guide cylinders 130 are provided inside the pump housing 100. Each guide post 227 is correspondingly inserted into each guide cylinder 130. Each guide post 227 is fitted with a top holding spring 228. The top holding spring 228 is used to push the blower housing 221 so that the top post 225 abuts against the inclined push surface 2121.

[0046] It should be noted that the top-holding spring 228 continuously pushes the blower housing 221, causing the blower housing 221 to always tend to rise and approach the rotating block 210, thereby ensuring that the top column 225 always remains in contact with the inclined push surface 2121. In one embodiment, three guide columns 227, guide cylinders 130, and top-holding springs 228 are provided and respectively assembled. In this way, it is ensured that the blower housing 221 can slide stably within the pump housing 100.

[0047] like Figure 4 As shown, in one embodiment, two inclined push surfaces 2121 are provided, and the two inclined push surfaces 2121 are symmetrically distributed in a circle on the drive protrusion 212. Correspondingly, two top posts 225 are also provided on the blower housing 221, and the two top posts 225 are also symmetrically distributed in a circle relative to the swivel cover 211. In this way, it is ensured that when the swivel block 210 rotates, it can stably push the blower housing 221 to slide in the pump housing 100.

[0048] like Figure 5 and Figure 8 As shown, in one embodiment, a first valve frame 310 is slidably disposed inside the second air outlet 120. A first valve plate 320 is disposed on one end of the first valve frame 310 located outside the pump housing 100. A first spring 330 is sleeved on the first valve frame 310. The first spring 330 is used to push the first valve frame 310 so that the first valve frame 310 drives the first valve plate 320 to seal the second air outlet 120.

[0049] It should be noted that when the pump housing 100 is installed on the inflatable product, the second air vent 120 is located inside the inflatable product. To prevent air leakage from the inflatable product through the second air vent 120, the aforementioned sealing structure is installed on the second air vent 120. Specifically, the first valve frame 310 can slide along the axial direction of the second air vent 120, the first valve plate 320 is made of silicone and is fixedly installed on the end of the first valve frame 310, and the first spring 330 is sleeved on the first valve frame 310. Thus, the first spring 330 pushes against the first valve frame 310, causing the first valve frame 310 to drive the first valve plate 320 to seal the second air vent 120.

[0050] like Figure 5 and Figure 6As shown, in one embodiment, a top block 2214 is provided on the air inlet 2211, and a clearance groove 22121 is provided on the air outlet 2212. When the air inlet 2211 is connected to the second air outlet 120, the top block 2214 pushes against the first valve frame 310, thereby causing the first valve plate 320 to open the second air outlet 120. When the air outlet 2212 is connected to the second air outlet 120, the clearance groove 22121 avoids the first valve frame 310.

[0051] It should be noted that when the air inlet 2211 is connected to the second air outlet 120, the air outlet 2212 is connected to the first air outlet 110. As the motor 222 drives the impeller 223 to rotate, the gas flow path is the second air outlet 120, the air inlet 2211, the air outlet 2212, and the first air outlet 110. At this time, the air pump is in the air release state. Since the first spring 330 pushes the first valve frame 310, the first valve plate 320 closes the second air outlet 120, which will prevent the gas from flowing out of the inflated product through the second air outlet 120. Therefore, a top block 2214 is set on the air inlet 2211. When the blower shell 221 slides to connect the air inlet 2211 with the second air outlet 120, the top block 2214 will push the first valve frame 310 open, thereby allowing the first valve plate 320 to open the second air outlet 120, so that the air pump can smoothly release gas to the inflated product. Correspondingly, when the air outlet 2212 is connected to the second air outlet 120, the air inlet 2211 is connected to the first air outlet 110. The gas flow path is: first air outlet 110, air inlet 2211, air outlet 2212, second air outlet 120. At this time, the air pump is in inflation mode. The air gap 22121 of the air outlet 2212 provides air clearance to the first valve frame 310. When gas flows in, the gas pressure automatically pushes open the first valve plate 320, allowing gas to flow from the second air outlet 120 into the inflatable product for inflation. After inflation is complete, as the gas flow stops, the first valve plate 320 immediately closes the second air outlet 120 under the force of the first spring 330. This ensures the airtightness of the inflatable product and prevents leakage.

[0052] like Figure 1 As shown, in one embodiment, a protective cover 340 is provided on the outer side of the second air vent 120. It should be noted that the protective cover 340 has a hollow structure and is used to protect components such as the first valve plate 320 and the first valve frame 310.

[0053] like Figure 7 , Figure 9 and Figure 10As shown, in one embodiment, the pump casing 100 is further provided with a third air vent 140 and a fourth air vent 150 that are interconnected. The third air vent 140 and the fourth air vent 150 are independent of the first air vent 110 and the second air vent 120. A second valve bracket 410 is slidably arranged on the fourth air vent 150. A second valve plate 420 is arranged on one end of the second valve bracket 410 located outside the pump casing 100. A second spring 430 is sleeved on the second valve bracket 410. The second spring 430 is used to push the second valve bracket 410 so that the second valve bracket 410 drives the second valve plate 420 to seal the fourth air vent 150.

[0054] It should be noted that the third air vent 140 and the fourth air vent 150 are interconnected to form an independent air duct structure that penetrates the pump housing 100. A second valve bracket 410 is slidably installed within this air duct structure, and the second valve bracket 410 is pushed by a second spring 430, thereby causing the second valve plate 420 installed at the end of the second valve bracket 410 to close the air duct. It is important to note that the air duct structure between the third air vent 140 and the fourth air vent 150, and the air duct structure formed by the first air vent 110 and the second air vent 120, are two independent air duct structures. Thus, the air duct structure containing the first air vent 110 and the second air vent 120 is equipped with an electric drive assembly 200, which uses electricity to power the air pump for electric inflation or deflation. When the user lacks power (including mains power or batteries from a power bank), manual inflation and deflation can be achieved through the air duct structure containing the third air vent 140 and the fourth air vent 150. Specifically, after connecting the manual air pump to the third air vent 140, the second valve plate 420 can be opened by the manual air pump to inflate the inflatable product. When deflation is required, a pushing force is applied to the second valve frame 410, causing the second spring 430 to compress. The second valve plate 420 then opens the fourth air vent 150, allowing the gas inside the inflatable product to be manually deflated through the air duct structure containing the third air vent 140 and the fourth air vent 150. In this way, both electrically driven inflation and deflation functions and manual inflation and deflation functions are integrated into the USB DC air pump 10 of this application, effectively improving its adaptability.

[0055] The above-described embodiments are merely illustrative of several implementations of this utility model, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the utility model patent. Unless otherwise specifically defined, the installation / fixing / setting mentioned in this utility model can be understood as including, but not limited to, locking and fixing with screws / bolts, welding, or bonding with adhesives, wherein the adhesives used can be commercially available finished products. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A USB DC air pump, characterized in that, include: Pump casing, wherein a first air inlet and a second air inlet are provided on the pump casing and are interconnected; and An electric drive assembly includes a rotary block and a blower. The rotary block is rotatably mounted on the pump housing and has an inclined pushing surface. The blower is slidably mounted inside the pump housing and abuts against the inclined pushing surface. The blower has an air inlet and an air outlet. When the rotary block is rotated under force, one of the air inlet and the air outlet of the blower communicates with the first air outlet, and the other communicates with the second air outlet.

2. The USB DC air pump according to claim 1, characterized in that, The rotating block includes a cap and a driving protrusion. The cap and the driving protrusion are connected to each other, and the cap is located outside the first air vent. The driving protrusion is located inside the first air vent, so that the rotating block rotates relative to the first air vent. The inclined push surface is located on the driving protrusion.

3. The USB DC air pump according to claim 2, characterized in that, The electric drive assembly also includes a positioning block and a positioning spring. A plurality of positioning grooves are provided on the outer side wall of the drive protrusion. The positioning block is slidably disposed on the pump housing. The positioning spring abuts against the positioning block and the pump housing respectively. The positioning spring is used to push the positioning block so that the positioning block engages with at most one of the positioning grooves.

4. The USB DC air pump according to claim 2, characterized in that, The blower assembly includes a blower housing, a motor, an impeller, a circuit board, and a top column. The blower housing is slidably disposed within the pump housing. A centrifugal air duct is formed within the blower housing. The air inlet and the air outlet are located at opposite ends of the centrifugal air duct and are situated on the same side of the blower housing. The motor is mounted on the outer wall of the blower housing. The impeller is located within the centrifugal air duct and is connected to the output shaft of the motor. The circuit board is mounted on the outer wall of the blower housing and is electrically connected to the motor. The top column is mounted on the outer wall of the blower housing, and its end abuts against the inclined push surface.

5. The USB DC air pump according to claim 4, characterized in that, A switch is provided on the circuit board, and an activation protrusion is provided on the screw cap. When the screw cap rotates relative to the pump housing, the activation protrusion presses against or moves away from the switch.

6. The USB DC air pump according to claim 4, characterized in that, The blower housing is provided with a number of guide posts, and the pump housing is provided with a number of guide cylinders. Each guide post is correspondingly inserted into each of the guide cylinders. Each guide post is fitted with a top holding spring, which is used to push the blower housing so that the top post abuts against the inclined pushing surface.

7. The USB DC air pump according to claim 1, characterized in that, A first valve frame is slidably disposed inside the second air outlet. A first valve plate is disposed on one end of the first valve frame located outside the pump housing. A first spring is sleeved on the first valve frame. The first spring is used to push the first valve frame so that the first valve frame drives the first valve plate to seal the second air outlet.

8. The USB DC air pump according to claim 7, characterized in that, The air inlet is provided with a top block, and the air outlet is provided with a clearance groove. When the air inlet is connected to the second air outlet, the top block pushes against the first valve frame, thereby causing the first valve plate to open the second air outlet. When the air outlet is connected to the second air outlet, the clearance groove avoids the first valve frame.

9. The USB DC air pump according to claim 7, characterized in that, A protective cover is installed on the outside of the second air vent.

10. The USB DC air pump according to claim 1, characterized in that, The pump casing is also provided with a third air outlet and a fourth air outlet that are interconnected. The third air outlet and the fourth air outlet are independent of the first air outlet and the second air outlet. A second valve frame is slidably arranged on the fourth air outlet. A second valve plate is arranged on one end of the second valve frame located on the outside of the pump casing. A second spring is sleeved on the second valve frame. The second spring is used to push the second valve frame so that the second valve frame drives the second valve plate to seal the fourth air outlet.

Images