INFLATOR PUMP AND ONE-WAY PISTON

Description

CROSS REFERENCE TO RELATED APPLICATIONS

The present application claims the benefit of Chinese Patent Application Nos. 202421023752.5 filed on May 11, 2024, and 202520145808.2 and 202520145906.6 filed on Jan. 22, 2025. All the above are hereby incorporated by reference in their entirety.

FIELD OF TECHNOLOGY

This application relates to the technical field of inflator pumps, particularly an inflator pump and a one-way piston.

BACKGROUND

An inflator pump is a common mechanical device primarily used to compress air or other gases and deliver them into a specific container or space to increase internal air pressure. Inflator pumps have broad application scenarios, covering multiple fields such as daily life, industrial production, and healthcare. In daily life, inflator pumps are commonly used to inflate car tires, bicycle tires, inflatable mattresses, swimming rings, and the like.

Most existing inflator pumps only have a single inflation function and lack the dual functionality of both suction and inflation, requiring the user to purchase an additional suction device, thus increasing usage costs. Therefore, this application proposes an inflator pump to address this issue.

SUMMARY

In view of the shortcomings of the prior art mentioned above, an objective of this application is to provide an inflator pump.

To achieve the above objective, this application provides an inflator pump, including a housing, where the housing includes a middle shell, a top of the middle shell is provided with an upper shell, a bottom of the middle shell is provided with a lower shell, the housing is mounted with a drive mechanism therein, the drive mechanism is mounted in a cylindrical shell, an inclined swing piece, a piston, and a circular plate are disposed in the cylindrical shell, a plurality of piston holes are annularly arranged at equal angles to penetrate through a top of the circular plate in a longitudinal direction, the piston is disposed in cooperation with the piston hole, the drive mechanism is configured to drive the inclined swing piece to swing and periodically push and pull the piston to reciprocate, a through hole penetrates through a center position of the top of the circular plate, a one-way valve is mounted in the through hole, a suction nozzle thread port penetrates through a top of the upper shell, and an inflation nozzle thread port penetrates through a bottom of the lower shell.

Optionally, the upper shell and the lower shell are integrally formed with the middle shell, and the suction nozzle thread port and the inflation nozzle thread port are each connectable to an air nozzle.

Optionally, the air nozzle includes a threaded pipe end, the suction nozzle thread port and the inflation nozzle thread port are each in threaded engagement with the threaded pipe end, a top of the threaded pipe end is mounted with an air nozzle end, and the air nozzle end communicates with the threaded pipe end.

Optionally, a front surface of the middle shell is provided with a control panel, the control panel includes a power button, an air pressure adjustment button, and a display screen, a controller is mounted in the middle shell, and the drive mechanism and the control panel are both electrically connected to the controller.

Optionally, a side wall of the middle shell is provided with an interface structure, the interface structure includes an interface slot, a car charger DC head and a Type-C charging port are disposed in the interface slot, and a dustproof plug is detachably snapped into the interface slot.

Optionally, an outer wall of the housing is provided with a heat dissipation mechanism, the heat dissipation mechanism includes a first heat dissipation outlet and a second heat dissipation outlet, the first heat dissipation outlet is disposed on a side wall of the upper shell, and the second heat dissipation outlet is disposed on the side wall of the middle shell.

Optionally, the drive mechanism includes a motor, the motor is disposed on a side of a bottom of the cylindrical shell, the cylindrical shell is fixedly disposed in the middle shell, an output end of the motor penetrates through the cylindrical shell and is mounted with an output gear, an eccentric wheel is rotatably disposed in the cylindrical shell, the eccentric wheel meshes with the output gear, an eccentric rod is mounted above the eccentric wheel, the inclined swing piece is mounted above the eccentric rod, a top of the eccentric rod is provided with an eccentric hole, a central axis of the eccentric hole forms an angle with a rotation axis of the eccentric wheel, one end of a drive shaft is inserted into the eccentric hole, the other end of the drive shaft is mounted with the inclined swing piece, and the drive shaft is connected to a center position of the inclined swing piece.

Optionally, a periphery of the inclined swing piece is uniformly and fixedly provided with a plurality of swing arms, a connection hole penetrates through a top of the swing arm, the circular plate is fixed at an upper end inside the cylindrical shell, a bottom of the piston is fixedly provided with a piston rod, a bottom of the piston rod is fixedly provided with a connecting ball head, and the connecting ball head cooperates with the connection hole to connect the piston and the inclined swing piece.

Optionally, a bottom of the circular plate is fixedly provided with an anti-scratch washer, an inner wall of the anti-scratch washer is smooth, and the swing arm is in sliding contact with the anti-scratch washer. A bottom of the eccentric wheel is fixedly provided with a rotating rod, and the rotating rod is rotatably mounted at a bottom inside the cylindrical shell.

Optionally, a top of the eccentric wheel is fixedly mounted with a connecting block, a top of the connecting block is fixedly mounted with the eccentric rod, another side of the bottom of the cylindrical shell is mounted with an intake pipe, the intake pipe penetrates through the cylindrical shell, and a penetration region between the intake pipe and the cylindrical shell is sealed.

Optionally, the piston includes a cylindrical plug body, a direction in which the plug body compresses and discharges fluid in a cylindrical shell is defined as forward, an opposite direction is defined as backward, a plug rod is connected to a rear side of the plug body along an axial direction, and a flow guide channel is disposed along a periphery of the plug body.

A sealing ring is provided in the flow guide channel, and a thickness of the sealing ring is less than a front-rear width of the flow guide channel, allowing the sealing ring to move forward and backward in the flow guide channel; an outer diameter of the sealing ring is greater than an outer diameter of the plug body, allowing the sealing ring to protrude from the periphery of the plug body and abut against an inner wall of the cylindrical shell for sealing; an inner diameter of the sealing ring is greater than a bottom radius of the flow guide channel, so as to form a first flow guide channel between the sealing ring and the flow guide channel; and a flow guide hole communicating with the first flow guide channel is disposed at a front end of the plug body.

When the plug body moves forward, the sealing ring moves backward under friction with the inner wall of the cylindrical shell to tightly abut against a rear side wall of the flow guide channel, preventing fluid on a front side of the plug body from flowing to a rear side of the plug body; and when the plug body moves backward, the sealing ring moves forward under friction with the inner wall of the cylindrical shell to tightly abut against a front side wall of the flow guide channel, so as to form a second flow guide channel between a rear side wall of the sealing ring and the rear side wall of the flow guide channel, allowing fluid on the rear side of the plug body to flow to the front side of the plug body sequentially through the second flow guide channel, the first flow guide channel, and the flow guide hole, thereby achieving one-way flow guide of the one-way piston.

Optionally, a force-bearing slot communicating with the flow guide hole is further disposed on a front side of the sealing ring, and when the plug body moves forward to compress and discharge fluid, the fluid on the front side of the plug body presses the force-bearing slot, allowing the sealing ring to move backward to tightly abut against the rear side wall of the flow guide channel.

Optionally, a plurality of flow guide holes are distributed uniformly and circumferentially on the front side of the plug body.

To resolve the problems in the prior art, this application further provides a one-way piston, including a cylindrical plug body. A direction in which the plug body compresses and discharges fluid in a cylindrical shell is defined as forward, an opposite direction is defined as backward, a plug rod is connected to a rear side of the plug body along an axial direction, and a flow guide channel is disposed along a periphery of the plug body.

A sealing ring is provided in the flow guide channel, and a thickness of the sealing ring is less than a front-rear width of the flow guide channel, allowing the sealing ring to move forward and backward in the flow guide channel; an outer diameter of the sealing ring is greater than an outer diameter of the plug body, allowing the sealing ring to protrude from the periphery of the plug body and abut against an inner wall of the cylindrical shell for sealing; an inner diameter of the sealing ring is greater than a bottom radius of the flow guide channel, so as to form a first flow guide channel between the sealing ring and the flow guide channel; and a flow guide hole communicating with the first flow guide channel is disposed at a front end of the plug body.

When the plug body moves forward, the sealing ring moves backward under friction with the inner wall of the cylindrical shell to tightly abut against a rear side wall of the flow guide channel, preventing fluid on a front side of the plug body from flowing to a rear side of the plug body; and when the plug body moves backward, the sealing ring moves forward under friction with the inner wall of the cylindrical shell to tightly abut against a front side wall of the flow guide channel, so as to form a second flow guide channel between a rear side wall of the sealing ring and the rear side wall of the flow guide channel, allowing fluid on the rear side of the plug body to flow to the front side of the plug body sequentially through the second flow guide channel, the first flow guide channel, and the flow guide hole, thereby achieving one-way flow guide of the one-way piston.

Optionally, a force-bearing slot communicating with the flow guide hole is further disposed on a front side of the sealing ring, and when the plug body moves forward to compress and discharge fluid, the fluid on the front side of the plug body presses the force-bearing slot, allowing the sealing ring to move backward to tightly abut against the rear side wall of the flow guide channel.

Optionally, a plurality of flow guide holes are distributed uniformly and circumferentially on the front side of the plug body.

Compared with the prior art, this application has the following beneficial effects:

• • 1. Through the structures such as the one-way valve, the piston, and the air nozzle provided in this application, after the motor starts, its output end drives the output gear to rotate. The output gear meshes with the eccentric wheel to rotate the eccentric wheel. The rotation of the eccentric wheel is transmitted to the inclined swing piece via the eccentric rod and drive shaft, causing the inclined swing piece to swing. The swinging of the inclined swing piece drives the piston to reciprocate in the piston hole via the connecting block and the connecting ball head. When inflation is needed, a suitable air nozzle is selected and tightly screwed through rotation onto the inflation nozzle thread port of the inflator pump. Then the air nozzle is inserted into the valve of the to-be-inflated product and tightened. When the piston moves downward, the gas in the cylindrical shell enters the upper shell via the one-way valve. When the piston moves upward, the gas in the upper shell is compressed to enter the inflatable product via the air nozzle, thus achieving the inflation function through reciprocation. When suction is needed, a suitable air nozzle is selected and tightly screwed through rotation onto the suction nozzle thread port of the inflator pump. Then the air nozzle is inserted into the valve of the product that is to undergo suction, and tightened. When the piston moves upward, the gas in the product is sucked. When the piston moves downward, the gas in the cylindrical shell is discharged outward via the one-way valve, thus achieving the suction function through reciprocation. This addresses the issue that most existing inflator pumps only have a single inflation function and lack the dual functionality of both suction and inflation, requiring the user to purchase an additional suction device, thus increasing usage costs.
  • 2. This application provides the car charger DC head and the Type-C charging port, helping to provide power supply to charge the inflator pump. As the dustproof plug is detachably snapped into the interface slot, dust-proof protection can be provided for the car charger DC head and the Type-C charging port.
  • 3. This application improves the heat dissipation performance of the inflator pump and prolongs the service life of the inflator pump by providing the first heat dissipation outlet and the second heat dissipation outlet.
  • 4. This application provides the anti-scratch washer between the inclined swing piece and the inner wall of the cylindrical shell. During the swinging process, the inclined swing piece is in sliding contact with the smooth inner wall of the anti-scratch washer. This effectively avoids direct scraping between the inclined swing piece and the inner wall of the cylindrical shell, reducing noise caused by scraping. It also reduces wear on the inner wall of the cylindrical shell during the swinging process, thereby prolonging the service life of the inclined swing piece.
  • 5. The periphery of the one-way piston provided in this application is provided with the annular flow guide channel, and the sealing ring is provided in the flow guide channel. The thickness of the sealing ring is less than the front-rear width of the flow guide channel, allowing the sealing ring to move forward and backward in the flow guide channel. The outer diameter of the sealing ring is greater than the outer diameter of the plug body, allowing the sealing ring to protrude from the periphery of the plug body and abut against the inner wall of a cylinder for sealing. This prevents fluid from passing a space between the sealing ring and the inner wall of the cylinder. The inner diameter of the sealing ring is greater than the bottom radius of the flow guide channel, so as to form a first flow guide channel between the sealing ring and the flow guide channel. The flow guide hole communicating with the first flow guide channel is disposed at a front end of the plug body. When the plug body moves forward to discharge the fluid on the front side of the plug body, the sealing ring moves backward in the flow guide channel under friction with the inner wall of the cylinder. This causes the rear side wall of the sealing ring to tightly abut against the rear side wall of the flow guide channel. It prevents the fluid on the front side of the plug body from flowing to the rear side of the plug body during the discharge process, ensuring the correct flow direction of the discharged fluid. When the plug body moves backward to draw in fluid from the rear side of the plug body, the sealing ring moves forward in the flow guide channel under friction with the inner wall of the cylinder. This causes the front side wall of the sealing ring to tightly abut against the front side wall of the flow guide channel. The second flow guide channel is formed between the rear side wall of the sealing ring and the rear side wall of the flow guide channel. The second flow guide channel communicates with the first flow guide channel, allowing the fluid on the rear side of the plug body to be drawn to the front side of the plug body sequentially through the second flow guide channel, the first flow guide channel, and the flow guide hole. This ensures the proper operation of the piston and achieves one-way flow guide of the one-way piston. The structure of the piston is simple and not easily damaged, providing a good one-way flow guide effect.

BRIEF DESCRIPTION OF THE DRAWINGS

The technical solutions of this application will be further described in detail below with reference to the drawings and embodiments. In the figure:

FIG. 1 is a front three-dimensional view according to this application.

FIG. 2 is a rear three-dimensional view according to this application.

FIG. 3 is a front view according to this application.

FIG. 4 is a schematic structural diagram according to this application.

FIG. 5 is a schematic structural diagram of an air nozzle according to this application.

FIG. 6 is a three-dimensional view of a drive mechanism and a cylindrical shell according to this application.

FIG. 7 is a schematic exploded diagram of the drive mechanism according to this application.

FIG. 8 is a schematic structural diagram of a piston according to this application.

FIG. 9 is a schematic diagram of an exploded structure of the piston according to this application.

FIG. 10 is a cross-sectional view of a side surface of the piston according to this application.

FIG. 11 is a schematic structural cross-sectional view of the piston in another state according to this application.

DESCRIPTION OF REFERENCE NUMERALS

1. piston hole; 2. drive mechanism; 21. motor; 22. eccentric wheel; 23. drive shaft; 24. swing arm; 25. eccentric hole; 26. output gear; 27. connection hole; 28. inclined swing piece; 29. rotating rod; 3. housing; 31. upper shell; 32. middle shell; 33. lower shell; 4. anti-scratch washer; 5. circular plate; 6. connecting block; 7. eccentric rod; 8. air nozzle; 81. air nozzle end; 82. threaded pipe end; 9. connecting ball head; 10. piston; 11. cylindrical shell; 12. intake pipe; 13. inflation nozzle thread port; 14. suction nozzle thread port; 15. through hole; 16. one-way valve; 17. control panel; 171. display screen; 172. power button; 173. air pressure adjustment button; 18. interface structure; 181. dustproof plug; 182. car charger DC head; 183. Type-C charging port; 19. heat dissipation mechanism; 191. first heat dissipation outlet; 192. second heat dissipation outlet; 101. plug body; 102. plug rod; 104. flow guide channel; 105. sealing ring; 106. first flow guide channel; 107. flow guide hole; 108. second flow guide channel; and 109. force-bearing slot.

DESCRIPTION OF THE EMBODIMENTS

It should be noted that, in the absence of conflict, the embodiments and features within the embodiments of this application may be combined with each other. The preferred embodiments of this application will be described in detail with reference to the drawings.

As shown in FIGS. 1 to 8, this application provides specific embodiments of an inflator pump.

The inflator pump includes a housing 3. The housing 3 includes a middle shell 32. A top of the middle shell 32 is provided with an upper shell 31. A bottom of the middle shell 32 is provided with a lower shell 33. The housing 3 is mounted with a drive mechanism 2 therein, and the drive mechanism 2 is mounted in a cylindrical shell 11. An inclined swing piece 28, a piston 10, and a circular plate 5 are provided in the cylindrical shell 11. A plurality of piston holes 1 are annularly arranged at equal angles to penetrate through a top of the circular plate 5 in a longitudinal direction. The piston 10 is disposed in cooperation with the piston hole 1. The drive mechanism 2 is configured to drive the inclined swing piece 28 to swing and periodically push and pull the piston 10 to reciprocate. The drive mechanism 2 includes a motor 21. The motor 21 is disposed on a side of a bottom of the cylindrical shell 11, and another side of the bottom of the cylindrical shell 11 is mounted with an intake pipe 12. The intake pipe 12 penetrates through the cylindrical shell 11, and a penetration region between the intake pipe 12 and the cylindrical shell 11 is sealed. The cylindrical shell 11 is fixedly disposed in the middle shell 32. An output end of the motor 21 penetrates through the cylindrical shell 11 and is mounted with an output gear 26. An eccentric wheel 22 is rotatably disposed in the cylindrical shell 11, and a bottom of the eccentric wheel 22 is fixedly provided with a rotating rod 29. The rotating rod 29 is rotatably mounted at a bottom inside the cylindrical shell 11. The eccentric wheel 22 meshes with the output gear 26. An eccentric rod 7 is mounted above the eccentric wheel 22, a top of the eccentric wheel 22 is fixedly mounted with a connecting block 6, and a top of the connecting block 6 is fixedly mounted with the eccentric rod 7. The inclined swing piece 28 is mounted above the eccentric rod 7, and a top of the eccentric rod 7 is provided with an eccentric hole 25. A central axis of the eccentric hole 25 forms an angle with a rotation axis of the eccentric wheel 22. One end of a drive shaft 23 is inserted into the eccentric hole 25, and the other end of the drive shaft 23 is mounted with the inclined swing piece 28. The drive shaft 23 is connected to a center position of the inclined swing piece 28, and a periphery of the inclined swing piece 28 is uniformly provided with a plurality of swing arms 24. A connection hole 27 penetrates through a top of the swing arm 24. The circular plate 5 is fixed at an upper end inside the cylindrical shell 11. A bottom of the piston 10 is fixedly provided with a plug rod 102, and a bottom of the plug rod 102 is fixedly provided with a connecting ball head 9. The connecting ball head 9 cooperates with the connection hole 27 to connect the piston 10 and the inclined swing piece 28. A through hole 15 penetrates through a center position of the top of the circular plate 5. A one-way valve 16 is mounted in the through hole 15, and the one-way valve 16 allows gas in the middle shell 32 to be discharged outward. A suction nozzle thread port 14 penetrates through a top of the upper shell 31, and an inflation nozzle thread port 13 penetrates through a bottom of the lower shell 33. The upper shell 31 and the lower shell 33 are integrally formed with the middle shell 32. The suction nozzle thread port 14 and the inflation nozzle thread port 13 are each connectable to an air nozzle 8. The air nozzle 8 includes a threaded pipe end 82. The suction nozzle thread port 14 and the inflation nozzle thread port 13 are each in threaded engagement with the threaded pipe end 82. A top of the threaded pipe end 82 is mounted with an air nozzle end 81, and the air nozzle end 81 communicates with the threaded pipe end 82. A front surface of the middle shell 32 is provided with a control panel 17, and the control panel 17 includes a power button 172, an air pressure adjustment button 173, and a display screen 171. A controller is mounted in the middle shell 32. The drive mechanism 2 and the control panel 17 are both electrically connected to the controller. After the motor 21 starts, its output end drives the output gear 26 to rotate. The output gear 26 meshes with the eccentric wheel 22 to rotate the eccentric wheel 22. The rotation of the eccentric wheel 22 is transmitted to the inclined swing piece 28 via the eccentric rod 7 and the drive shaft 23, causing the inclined swing piece 28 to swing. The swinging of the inclined swing piece 28 drives the piston 10 to reciprocate in the piston hole 1 via the swing arm 24 and the connecting ball head 9. When inflation is needed, a suitable air nozzle 8 is selected and tightly screwed through rotation onto the inflation nozzle thread port 13 of the inflator pump. Then the air nozzle 8 is inserted into the valve of the to-be-inflated product and tightened. When the piston 10 moves downward, the gas in the cylindrical shell 11 enters the upper shell 31 via the one-way valve 16. When the piston 10 moves upward, the gas in the upper shell 31 is compressed to enter the inflatable product via the air nozzle 8, thus achieving the inflation function through reciprocation. When suction is needed, a suitable air nozzle 8 is selected and tightly screwed through rotation onto the suction nozzle thread port 14 of the inflator pump. Then the air nozzle 8 is inserted into the valve of the product that is to undergo suction, and tightened. When the piston 10 moves upward, the gas in the product is sucked. When the piston 10 moves downward, the gas in the cylindrical shell 11 is discharged outward via the one-way valve 16, thus achieving the suction function through reciprocation. This addresses the issue that most existing inflator pumps only have a single inflation function and lack the dual functionality of both suction and inflation, requiring the user to purchase an additional suction device, thus increasing usage costs.

As an improvement to the above technical solution, a side wall of the middle shell 32 is provided with an interface structure 18, and the interface structure 18 includes an interface slot. A car charger DC head 182 and a Type-C charging port 183 are disposed in the interface slot. A dustproof plug 181 is detachably snapped into the interface slot. The arrangement of the car charger DC head 182 and Type-C charging port 183 helps to provide power supply to charge the inflator pump. The dustproof plug 181 is detachably snapped into the interface slot, which can provide dust-proof protection for the car charger DC head 182 and the Type-C charging port 183.

As an improvement to the above technical solution, an outer wall of the housing 3 is provided with a heat dissipation mechanism 19, and the heat dissipation mechanism 19 includes a first heat dissipation outlet 191 and a second heat dissipation outlet 192. The first heat dissipation outlet 191 is disposed on a side wall of the upper shell 31, and the second heat dissipation outlet 192 is disposed on the side wall of the middle shell 32. The arrangement of the first heat dissipation outlet 191 and the second heat dissipation outlet 192 improves the heat dissipation performance of the inflator pump, prolonging the service life of the inflator pump.

As an improvement to the above technical solution, a bottom of the circular plate 5 is fixedly provided with an anti-scratch washer 4, and an inner wall of the anti-scratch washer 4 is smooth. The swing arm 24 is in sliding contact with the anti-scratch washer 4. The anti-scratch washer 4 is provided between the inclined swing piece 28 and the inner wall of the cylindrical shell 11, and the inclined swing piece 28 is in sliding contact with the smooth inner wall of the anti-scratch washer 4 during the swinging process, effectively avoiding direct scraping between the inclined swing piece 28 and the inner wall of the cylindrical shell 11, thus reducing noise caused by scraping. It also reduces wear on the inner wall of the cylindrical shell 11 during the swinging process of the inclined swing piece 28, thereby prolonging the service life of the inclined swing piece 28.

Working Principle and Usage Method of this Application

Working Principle

Operation of drive mechanism: The drive mechanism 2 includes the motor 21, and the motor 21 is disposed on a side of a bottom of the cylindrical shell 11. After the motor 21 starts, its output end drives the output gear 26 to rotate. The output gear 26 meshes with the eccentric wheel 22 to rotate the eccentric wheel 22. The rotation of the eccentric wheel 22 is transmitted to the inclined swing piece 28 via the eccentric rod 7 and drive shaft 23, causing the inclined swing piece 28 to swing.

Inflation and suction through reciprocation of piston 10: The swinging of the inclined swing piece 28 drives the piston 10 to reciprocate in the piston hole 1 via the swing arm 24 and the connecting ball head 9. When inflation is needed, a suitable air nozzle 8 is selected and tightly screwed through rotation onto the inflation nozzle thread port 13 of the inflator pump. Then the air nozzle 8 is inserted into the valve of the to-be-inflated product and tightened. When the piston 10 moves downward, the gas in the cylindrical shell 11 enters the upper shell 31 via the one-way valve 16. When the piston 10 moves upward, the gas in the upper shell 31 is compressed to enter the inflatable product via the air nozzle 8, thus achieving the inflation function through reciprocation. When suction is needed, a suitable air nozzle 8 is selected and tightly screwed through rotation onto the suction nozzle thread port 14 of the inflator pump. Then the air nozzle 8 is inserted into the valve of the product that is to undergo suction, and tightened. When the piston 10 moves upward, the gas in the product is sucked. When the piston 10 moves downward, the gas in the cylindrical shell 11 is discharged outward via the one-way valve 16, thus achieving the suction function through reciprocation.

Usage Method

• • Inflation: A suitable air nozzle 8 is selected and tightly screwed through rotation onto the inflation nozzle thread port 13 of the inflator pump. Then the air nozzle is inserted into the valve of the inflatable product and tightened. The power button 172 is pressed and held to power on. The display screen 171 is lit up. The “+” or “−” air pressure adjustment button 173 is pressed to set the desired inflation pressure value. After the above steps are completed, the power button 172 is short-pressed to start inflation. During the inflation process, the power button 172 is short-pressed again to stop inflation. When the inflation pressure is reached at the set value, the inflator pump is stopped. After inflation is completed, the power button 172 is pressed and held to power off.
  • Suction: A suitable air nozzle is selected and tightly screwed through rotation onto the suction nozzle thread port 14 of the inflator pump. Then the air nozzle 8 is inserted into the valve of the product that is to undergo suction, and tightened. The power button 172 is pressed and held to power on. Then the power button 172 is short-pressed to start suction. During the suction process, the power button 172 is short-pressed again to stop suction. After suction is completed, the power button 172 is pressed and held to power off.
  • Charging instructions: When the battery level is dropped below 20%, the indicator light is flashed, and charging is requested to be done promptly. Charging can be performed through the Type-C charging port 183 with a charging voltage of 5V2A. Charging may alternatively be conducted through the car charger DC head 182 using a car charging cable. During charging, the indicator light is flashed. When the battery is fully charged, the indicator light is kept steady.

It should be noted that the inflator pump can be powered by an internal battery or plugged in for use.

Referring to FIGS. 8 to 11, the piston 10 includes a plug body 101, a plug rod 102, and a sealing ring 105.

The plug body 101 is configured as cylindrical. In this embodiment, a direction in which the plug body 101 compresses and discharges fluid in the cylindrical shell 11 is defined as forward, and an opposite direction for drawing fluid is defined as backward. The plug rod 102 is disposed on the rear side of the plug body 101 along the axial direction of the plug body 101 to pull or push the piston 10 to move.

A periphery of the plug body 101 is provided with an annular flow guide channel 104. A sealing ring is provided in the flow guide channel 104. A thickness of the sealing ring 105 is less than a front-rear width of the flow guide channel 104, allowing the sealing ring 105 to move forward and backward in the flow guide channel 104. An outer diameter of the sealing ring 105 is greater than an outer diameter of the plug body 101, allowing the sealing ring 105 to protrude from the periphery of the plug body 101 and abut against an inner wall of the cylindrical shell 11 for sealing. This prevents fluid from passing a space between the sealing ring 105 and the inner wall of the cylindrical shell 11. An inner diameter of the sealing ring 105 is greater than a bottom radius of the flow guide channel 104, so as to form a first flow guide channel 106 between the sealing ring 105 and the flow guide channel 104. A flow guide hole 107 communicating with the first flow guide channel 106 is disposed at a front end of the plug body 101.

When the plug body 101 moves forward to discharge the fluid on the front side of the plug body 101, the sealing ring 105 moves backward in the flow guide channel 104 under friction with the inner wall of the cylindrical shell 11. This causes the rear side wall of the sealing ring 105 to tightly abut against the rear side wall of the flow guide channel 104. It prevents the fluid on the front side of the plug body 101 from flowing to the rear side of the plug body 101 during the discharge process, ensuring the correct flow direction of the discharged fluid. When the plug body 101 moves backward to draw in fluid from the rear side of the plug body 101, the sealing ring 105 moves forward in the flow guide channel 104 under friction with the inner wall of the cylindrical shell 11. This causes the front side wall of the sealing ring 105 to tightly abut against the front side wall of the flow guide channel 104. The second flow guide channel 108 is formed between the rear side wall of the sealing ring 105 and the rear side wall of the flow guide channel 104. The second flow guide channel 108 communicates with the first flow guide channel 106, allowing the fluid on the rear side of the plug body 101 to be drawn to the front side of the plug body 101 sequentially through the second flow guide channel 108, the first flow guide channel 106, and the flow guide hole 107. This ensures the proper operation of the piston 10 and achieves one-way flow guide of the one-way piston 10. The structure of the piston 10 is simple and not easily damaged, providing a good one-way flow guide effect.

As a preferred solution, a force-bearing slot 109 is further disposed on a front side of the sealing ring 105, and the force-bearing slot 109 communicates with the flow guide hole 107. When the plug body 101 moves forward to compress and discharge fluid, the fluid on the front side of the plug body 101 presses the force-bearing slot 109. This causes the sealing ring 105 to move backward in the flow guide channel 104 to tightly abut against the rear side wall of the flow guide channel 104, providing power for the movement of the sealing ring 105. Combined with the friction between the sealing ring 105 and the inner wall of the cylindrical shell 11, it jointly pushes the sealing ring 105 to move. This ensures the sealing ring 105 moves into position, achieving a good sealing effect and enhancing the stability of the one-way flow guide of the piston 10.

In this embodiment, a plurality of flow guide holes 107 are provided. They not only increase the flow rate during fluid drawing, but also allow the force-bearing slot 109 to be pressed better when fluid is compressed and discharged. This increases the pressing force of fluid on the sealing ring 105, ensuring the sealing ring 105 can accurately move into position. The plurality of flow guide holes 107 are distributed uniformly and circumferentially on the front side of the plug body 101, ensuring uniform flow around the periphery of the piston 10 and uniform force on the sealing ring 105. As a preferred solution, the flow guide hole 107 may alternatively be annularly arranged on the front side of the plug body 101 to achieve a good fluid guide effect.

It should be understood that the above embodiments are merely illustrative of the technical solutions of this application and should not be construed as limiting. Those skilled in the art may modify the technical solutions described in the embodiments or equivalently substitute some of the technical features. All such modifications and substitutions shall fall within the scope of protection defined by the appended claims of this application.