Vertical inflator

Abstract

The utility model discloses a vertical inflator which comprises an inflator body. The hollow piston rod can drive a piston to perform one-way blocking and non-return functions in a body, a communicating pipe is arranged in the piston rod, and an inner piston is arranged on the communicating pipe and can perform one-way non-return on the interior of the piston rod. Different air chambers in the inflator can be compressed by the piston and the inner piston respectively. The communicating pipe and the body are both fixed to an air outlet end, so that the piston rod can move forwards to the extreme position relative to the body, the inflator can play the maximum inflation efficiency, and the high-pressure inflation effect is provided.

Description

Technical Field

[0001] The utility model relates to an air pump, in particular to an upright air pump which can provide a large air intake volume and high pressure. Background Art

[0002] The existing upright air pump or floor-standing air pump is mainly composed of a main body and a piston rod. A space is set in the main body, and a connecting part is set at the front end of the piston rod. The connecting part can compress the gas in the space. When the connecting part makes a round trip in the space of the main body, it can compress the gas in the space once, and the compressed gas is used to inflate the space inside the inflatable object.

[0003] However, in the conventional upright air pump, the connecting portion only completes one action of compressing the gas in the space during one reciprocating stroke of the piston rod rising and falling. The piston rod must be repeatedly pulled up and pressed down for a large number of times to complete the inflation, which is relatively time-consuming and has low inflation efficiency.

[0004] Furthermore, the conventional upright air pump compresses the gas in the main body with only one connecting portion, and is unable to generate compressed gas with a high pressure value, and thus is unable to inflate the tire to a high pressure. Utility Model Content

[0005] One purpose of the utility model is to provide a vertical air pump, which can improve the inflation efficiency of the air pump.

[0006] One purpose of the utility model is to provide an upright air pump, which has a larger inflation volume.

[0007] One purpose of the utility model is to provide an upright air pump, which has inner and outer cylinder chambers. Through a single ascending and descending stroke, the gas in the inner and outer cylinder chambers can be compressed to increase the inflation volume.

[0008] One purpose of the utility model is to provide an upright air pump which can increase the pressure value of gas through multiple compressed air actions.

[0009] To achieve the above object, the utility model provides an upright air pump, comprising:

[0010] A main body is a cylinder body, having an air inlet end and an air outlet end; the air inlet end is provided with an opening, and the air outlet end is provided with an air outlet; a top cover is provided on the opening, a through hole is provided in the center of the top cover, and the air outlet is connected to an air pipe;

[0011] A piston rod is a hollow tube. The piston rod is arranged in the main body and can be displaced along the axial direction of the main body. A piston is arranged at one end of the piston rod, and the piston is arranged in the main body so that the space in the main body forms a first air chamber and a second air chamber; a connecting hole is arranged near the piston position of the piston rod to communicate with the inside of the piston rod; the other end of the piston rod is closed.

[0012] A connecting pipe is a hollow tube with a flow channel formed inside. One end of the connecting pipe is fixedly connected to the outlet end of the main body and connected to the outlet, and the other end is provided with an inner piston. The connecting pipe penetrates into the piston rod, and the inner piston divides the space of the piston rod into a third air chamber and a fourth air chamber. The connecting hole of the piston rod connects the second air chamber and the third air chamber. The fourth air chamber is connected to the flow channel of the connecting pipe.

[0013] a non-return assembly, arranged at the end of the connecting pipe, the non-return assembly prevents the gas in the flow channel of the connecting pipe from flowing out; the gas in the fourth air chamber can flow into the flow channel of the connecting pipe through the non-return assembly;

[0014] When the piston moves toward the first air chamber, gas can flow from the first air chamber into the second air chamber, and the fourth air chamber is compressed by the inner piston, so that the gas in the fourth air chamber enters the flow channel; when the piston moves toward the second air chamber, gas enters the first air chamber from the outside and compresses the gas in the second air chamber, and the gas in the second air chamber enters the third air chamber and the fourth air chamber from the connecting hole of the piston rod.

[0015] Thereby, when the piston rod of the upright air pump performs reciprocating motion, it can drive the piston and the inner piston to cause gas to enter and compress the first air chamber, the second air chamber, the third air chamber and the fourth air chamber, thereby increasing the air intake volume of the overall pumping stroke, and the piston rod can be pressed to the position closest to the air outlet and the air inlet end, thereby increasing the effective pumping stroke and efficiency of the air pump, and the gas can be repeatedly compressed to increase the gas pressure.

[0016] Preferably, the outer circumferential surface of the piston is recessed with an outer ring groove, and the outer ring groove is provided with at least one notch on the wall surface close to the second air chamber, and the notch is communicated with the outer ring groove; a sealing ring is sleeved in the outer ring groove, and when the sealing ring does not stop the notch, it can perform unidirectional non-return and block the first air chamber and the second air chamber; when the sealing ring stops at the notch, the first air chamber is communicated with the second air chamber.

[0017] Preferably, the non-return component is arranged between one end of the connecting pipe and the inner piston, and the non-return component is provided with a non-return seat connected to the connecting pipe, and the non-return seat is provided with an air inlet hole communicating with the flow channel; a non-return plate is arranged between the non-return seat and the inner piston, and an air guide hole is arranged in the center of the inner piston, and the non-return plate can connect or close the air inlet hole and the air guide hole, so that the non-return plate can prevent gas from flowing out of the connecting pipe.

[0018] Preferably, the anti-return seat is provided with an air guide portion around the air inlet, and the air guide portion has at least one air guide groove connected with the air inlet, and when the anti-return plate is against the air guide portion, the air guide hole will be connected with the air inlet.

[0019] Preferably, the check assembly is arranged below the inner piston; an actuating chamber is arranged at the bottom of the inner piston, and the check plate is arranged in the actuating chamber.

[0020] Preferably, the outer peripheral surface of the inner piston is provided with an annular groove, an airtight ring is slidably arranged in the annular groove, and the end surface of the inner piston is provided with at least one recessed portion communicating with the annular groove.

[0021] Preferably, one end of the piston rod passes through the body; a handle is provided at the end of the piston rod passing through the body.

[0022] Preferably, the air outlet end of the main body further includes a bottom plug, the air outlet is arranged at the top of the bottom plug, and the bottom plug is provided with a valve hole, which is communicated with the air outlet; a connecting valve is penetrated in the valve hole and is provided with an air hole connected with the air outlet, and the air hole is connected with the air pipe.

[0023] Preferably, a through hole is formed in the center of the piston; the connecting pipe penetrates into the piston rod through the through hole.

[0024] Preferably, the upright air pump further comprises a pedal, which is arranged on the outer side of the air outlet end of the body.

[0025] The beneficial effects of the present invention are as follows: the upright air pump provided by the present invention can pressurize and transmit the gas in the main body and the piston rod at the same time when the piston rod moves back and forth, so that the entire space in the air pump can effectively compress the air, increase the amount of air pumped, and reduce the number of times required for the pumping action. At the same time, the piston rod can be moved to the extreme positions at both ends of the main body through the stroke, which can effectively increase the pumping stroke and prevent the piston rod from colliding with the main body. The gas entering the flow channel is compressed in the second air chamber and the fourth air chamber respectively, so that the compressed gas pressure is increased, and higher pressure gas can be provided to enter the outlet. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to enable the review committee to further understand the purpose, features and effects of the present utility model, a preferred embodiment is given below and described in detail with reference to the drawings, wherein:

[0027] Figure 1 It is a three-dimensional diagram of an upright air pump according to a preferred embodiment of the utility model.

[0028] Figure 2 This is a three-dimensional exploded view of an upright air pump according to a preferred embodiment of the utility model.

[0029] Figure 3 It is a partial three-dimensional exploded view of an inner piston of a preferred embodiment of the utility model.

[0030] Figure 4 It is a longitudinal cross-sectional view of an upright air pump according to a preferred embodiment of the utility model.

[0031] Figure 5 This is a partial cross-sectional view of the bottom of the air pump of the utility model, showing the flow state of gas in the air pump when the piston rod is pulling up. In addition, Figure 5 And it shows that the piston rod and piston are at the bottom dead center.

[0032] Figure 6 It is a partial cross-sectional view of the top of the air pump of the utility model, showing the flow state of gas in the air pump when the piston rod performs an upward pull stroke.

[0033] Figure 7 This is a partial cross-sectional view of the pumping bottom cylinder of the utility model, showing the flow state of the gas when the piston rod moves downward. In addition, Figure 7 And it shows that the piston is at the bottom dead center.

[0034] Figure 8 It is a partial cross-sectional view of the top of the air pump of the utility model, showing the flow state of gas when the piston rod moves downward.

[0035] 10 body 101 air inlet end 102 air outlet end

[0036] 11 opening 12 top cover 121 perforation

[0037] 13 bottom plug 131 air outlet 132 valve hole

[0038] 14 connecting valve 141 air hole 15 air pipe

[0039] 151 Inflatable joint 16 Pedal

[0040] 20 piston rod 21 small cylinder chamber

[0041] 22 communication hole 23 handle

[0042] 30 piston 31 connecting part 32 outer ring groove

[0043] 321 shoulder 33 notch 34 through hole

[0044] 35 Sealing ring

[0045] 40 connecting pipe 41 flow channel

[0046] 50 check assembly 51 check seat 511 air inlet

[0047] 52 anti-return plate 53 air guide portion 531 air guide groove

[0048] 60 inner piston 61 actuating chamber 62 ring groove

[0049] 621 Shoulder

[0050] 63 concave portion 64 airtight ring 65 air guide hole

[0051] AThe first air chamberBThe second air chamberCThe third air chamber

[0052] D Fourth air chamber DETAILED DESCRIPTION

[0053] Please refer to Figures 1 to 4 As shown, a preferred embodiment of the upright air pump provided by the utility model includes:

[0054] A main body 10 is a cylinder body with a hollow interior, and the space inside it is a cylinder chamber (main cylinder chamber). The top and bottom ends of the main body 10 are an air inlet end 101 and an air outlet end 102 respectively. The air inlet end 101 of the main body 10 is provided with an opening 11; the opening 11 is covered with a top cover 12, and the top cover 12 can seal the air inlet end 101, and a through hole 121 is provided in the center of the top cover 12; a bottom plug 13 is provided at the air outlet end 102 of the main body 10, and an air outlet 131 is provided inwardly at the top of the bottom plug 13, and the bottom plug 13 is also provided with a valve hole 132, and the valve hole 132 is connected to the air outlet 131; a connecting valve 14 is penetrated in the valve hole 132, and the connecting valve 14 is also provided with an air hole 141 connected to the air outlet 131, such as Figure 4 As shown, one end of the connecting valve 14 is connected to an air pipe 15, and one end of the air pipe 15 is provided with an inflation connector 151 for connecting a tire air nozzle or other device to be inflated; in order to facilitate the upright standing and stepping of the air pump, a pedal 16 is provided on the outer side of the bottom end of the main body 10 near the air outlet 102.

[0055] A piston rod 20 is a hollow tube installed in the main body 10 and can be displaced along the axial direction of the main body 10. The space inside the piston rod 20 forms a small cylinder located in the main body 10, and a small cylinder chamber 21 is formed inside the piston rod 20. A connecting hole 22 is set at the bottom end of the piston rod 20, and the connecting hole 22 is located in the main body 10 and communicates with the small cylinder chamber 21 of the piston rod 20. The top end of the piston rod 20 is a closed end, located outside the main body 10, and is provided with a handle 23 for the user to drive the piston rod 20 to move in the main body 10.

[0056] A piston 30 is disposed at the bottom end of the piston rod 20, adjacent to the communication hole 22. The piston 30 is located in the body 10, and the cylinder chamber of the body 10 is divided into a first air chamber A and a second air chamber B. The first air chamber A is located between the air outlet end of the body 10 and the piston 30, and the second air chamber B is located between the air inlet end 101 of the body 10 and the piston 30. The top surface of the piston 30 is provided with a connecting portion 311 for assembly with the piston rod 20. In this embodiment, the connecting portion 311 and the piston rod are combined in a threaded manner so that the piston 30 can be assembled to the bottom end of the piston rod 20. The outer peripheral surface of the piston 30 is recessed with an outer ring groove 32. The outer ring groove 32 is provided with at least one notch 33 on a side wall facing the second air chamber B (i.e., the top wall of the outer ring groove 32). The bottom surface of the outer ring groove 32 is also provided with a shoulder surface 321. In addition, a through hole 34 is provided in the center of the piston 30, which penetrates the piston 30; a sealing ring 35 is sleeved in the outer ring groove 32, and its outer peripheral edge is sealingly engaged with the inner peripheral surface of the body 10. When the piston rod 20 drives the piston 30 to move toward the second air chamber B, that is, the piston 30 moves toward the top end (the air inlet end 101) of the body 10, the sealing ring 35 moves away from the notches 33 and abuts against the shoulder surface 321 of the outer ring groove 32. Figure 5 As shown, the sealing ring 35 produces an airtight effect, isolating the first air chamber A from the second air chamber B, so that the gas in the second air chamber B cannot move into the first air chamber A; when the piston rod 20 moves toward the first air chamber A, that is, the piston 30 moves toward the bottom end (the air outlet end 102) of the body 10, the sealing ring 35 is not supported at the notches 33 and deforms, forming a gap, and the sealing ring 35 cannot produce airtightness, the first air chamber A and the second air chamber B can be connected, and the gas in the first air chamber A can flow into the second air chamber B.

[0057] A connecting pipe 40 is a hollow tube with a flow channel 41 formed inside. The bottom end of the connecting pipe 40 is screwed to the air outlet 131 of the bottom plug 13, that is, fixed to the air outlet end 102 of the body 10, and is connected to the air hole 141 of the connecting valve 14; the top end of the connecting pipe 40 penetrates into the small cylinder chamber 21 of the piston tube 20 from the through hole 34 of the piston 20.

[0058] An inner piston 60 is installed at the top of the connecting tube 40 and is located in the small cylinder chamber 21 of the piston rod 20, and divides the small cylinder chamber 21 of the piston rod 20 into a third air chamber C and a fourth air chamber D; the third air chamber C is located between the inner piston 60 and the air outlet end 102 of the body 10, and the fourth air chamber D is located between the inner piston 60 and the air inlet end 101 of the body 10. Figure 3 and Figure 6 The inner piston 60 is provided with an air guide hole 65 axially penetrating the inner piston 60 and communicating with the flow channel 41 of the communicating pipe 40. An annular groove 62 is provided on the outer peripheral surface of the inner piston 60. The top surface of the inner piston 60 is provided with one or more recesses 63 communicating with the annular groove 62. The recess 63 can be a notch or a groove. Figure 3 A gas-tight ring 64 is installed in the annular groove 62 and seals the circumference of the small cylinder chamber 21. The piston rod 20 moves relative to the connecting pipe 40. When the connecting pipe 40 and the inner piston 60 move toward the third air chamber C, the gas-tight ring 64 moves away from the notches 33 and is supported by a shoulder surface 621 formed by a side wall of the annular groove 62. Figure 6 As shown, the airtight ring 64 produces an airtight effect, so that the gas in the fourth air chamber D cannot move into the third air chamber C; when the inner piston 60 moves toward the fourth air chamber D, the airtight ring 64 is not supported at the recessed portions 63 and is deformed, and cannot be airtight, so that the gas in the third air chamber C can flow into the fourth air chamber D.

[0059] In the present invention, the gas in the fourth air chamber D can only flow into the flow channel 41 of the connecting pipe 40 in one direction. To achieve this purpose, the present invention further includes a non-return assembly 50 disposed between the inner piston 60 and the connecting pipe 40 .

[0060] See also Figure 3 and Figure 6 The non-return assembly 50 includes a non-return seat 51 and a non-return plate 52; the non-return seat 51 is screwed on the top of the connecting pipe 40, and an air inlet hole 511 penetrating the two ends is arranged on the non-return seat 51 and communicated with the flow channel 41; the end surface of the top of the non-return seat 51 is provided with an air guide portion 53 and a plurality of air guide grooves 531, and the air guide portion 53 is a convex portion of a predetermined shape in this embodiment, and the air guide grooves 531 are formed in the convex portion of the air guide portion 53, and the air guide grooves 531 are communicated with the air inlet hole 511; when the non-return plate 52 is against the air guide portion 53, the air guide groove 531 can still maintain circulation, so that the air inlet hole 511 remains in a conductive state and will not be closed, so that the gas in the fourth air chamber D can flow into the flow channel 41.

[0061] The bottom end of the inner piston 60 is a sleeve, which is screwed onto the anti-return assembly 50 and sleeved on the top of the anti-return seat 51. An actuating chamber 61 is recessed at the bottom end of the inner piston 60. The anti-return plate 52 is disposed in the actuating chamber 61 and can move up and down in the actuating chamber 61.

[0062] When the piston rod 20 and the piston 30 move toward the air inlet end 101 of the main body 10 (i.e., when the piston 30 compresses the second air chamber B), the inner piston 60 moves relatively toward the third air chamber C. At this time, the air-tight ring 64 is not airtight, and the third air chamber C is connected to the fourth air chamber D, and the air will fill the third air chamber C and the fourth air chamber D. At the same time, because the volume of the fourth air chamber D increases and the air pressure decreases, the check plate 52 will move toward the air hole 65 in the actuating chamber 61 and fit the air hole 65, so that the air inlet hole 511 and the air hole 524 are blocked and sealed, and the gas in the flow channel 41 of the connecting tube 40 will not flow to the air hole 65 of the inner piston 60, so that the flow channel 41 and the fourth air chamber D remain isolated. When the piston rod 20 and the piston 30 move toward the air outlet end 102 of the main body 10 (i.e., when the piston 30 compresses the first air chamber A), the inner piston moves relatively toward the fourth air chamber D, and the air-tight ring 64 presses against the shoulder surface 621 of the ring groove 62 and is supported by the shoulder surface 621 to form an airtight seal, thereby separating the third air chamber C and the fourth air chamber D. At the same time, because the fourth air chamber D is compressed, the gas pressure increases, causing the check plate 52 to move toward the air inlet hole 511, so that the check plate 52 is attached to the top surface of the check seat 51, and the air guide grooves 531 connect the actuating chamber 61 and the air inlet hole 511, so that the gas in the fourth air chamber D can flow from the air guide hole 65 into the air inlet hole 511 and into the flow channel 41.

[0063] See also Figures 4 to 8 As shown, when the upright air pump is used to inflate objects such as tires or balloons, the air inflator connector 151 of the air tube 15 is first connected to the air nozzle of the object to be inflated, and then the handle 23 is held by hand to reciprocate and pull the piston rod 20 to perform the inflation operation. When the piston rod 20 is pulled up, refer to Figure 5 and 6 As shown in the figure, the piston 30 on the piston rod 20 moves toward the air inlet end 101 of the body 10 and compresses the second air chamber B, while the inner piston 60 moves relatively toward the third air chamber C. At this time, the sealing ring 35 blocks the first air chamber A and the second air chamber B, and the gas in the second air chamber B cannot flow into the first air chamber A. The volume of the first air chamber A increases and the air pressure decreases, and the external air will be sucked into the first air chamber A from the bottom end of the body 10, as shown in the figure. Figure 5The compressed gas in the second air chamber B will flow into the piston rod 20 through the connecting hole 22 and into the third air chamber C. As mentioned above, the inner piston 60 moves toward the third air chamber C. At this time, the airtight ring 64 is close to the recess 63 and deforms at the recess 63. The airtight ring 64 does not produce an airtight effect. The fourth air chamber D has an increased volume and a reduced air pressure. Therefore, the compressed gas entering the third air chamber C from the second air chamber B will pass over the inner piston 60 and flow into the fourth air chamber D with a lower air pressure. Figure 6 As shown, the anti-return plate 52 of the anti-return assembly 50 closes the air inlet 511 in the actuating chamber 61, so that the flow channel 41 and the piston rod 20 are sealed, and the gas in the flow channel 41 will not flow into the fourth air chamber D.

[0064] After the piston 30 reaches the top dead center of the upward stroke or stops moving upward, then, please participate in Figures 7 and 8 As shown, the user presses down the piston rod 20 and drives the piston 30 to move downward, compressing the gas in the first air chamber A. At this time, Figure 7 As shown, the sealing ring 35 will move toward the notches 33, and the sealing ring 35 cannot seal the cylinder chamber of the body 10, so that the first air chamber A and the second air chamber B can be connected. After the volume of the first air chamber A is compressed, the compressed gas flows into the second air chamber B to replenish the gas and air pressure in the second air chamber B; at the same time, the gas in the fourth air chamber D is blocked by the inner piston 60 and the space becomes smaller and compressed, and the airtight ring 64 of the inner piston 60 abuts against the shoulder surface 621 and is supported by the shoulder surface 621 to form an airtight effect, as shown in FIG. Figure 8 As shown, the third air chamber C and the fourth air chamber D are blocked, and the compressed gas in the fourth air chamber D flows into the actuating chamber 61 from the air guide hole 65 of the inner piston 60. The check plate 52 is acted upon by the compressed gas in the fourth air chamber D and leans against the air guide portion 53, so that the compressed air can flow from the air guide grooves 531 of the air guide portion 53 into the air inlet hole 511, and into the flow channel 41 of the connecting pipe 40, and then flow through the air outlet 131 of the bottom plug 13 to the air hole 141 of the connecting valve 14, and then be led out from the air pipe 15 to the inflation joint 151, and flow into the object to be inflated to inflate the object. The upward and downward movement of the piston rod 20 and the piston 30 can continuously perform the pressurization and inflation action until the desired air pressure is inflated.

[0065] By fixing the main body 10 and the connecting tube 40 at the bottom end (the air outlet end 102) of the main body 10 and allowing the piston rod 20 to be displaced relative to the main body 10 and the connecting tube 40, when the air pump of the utility model is operated for inflation, the piston rod 20 can move to the most extreme position relative to the main body 10, thereby enabling the air pump to exert maximum inflation efficiency, and the piston rod 20 will not collide with the main body 10 during operation.

[0066] The utility model uses the piston 30 to first compress the air in the body 10, and then compresses the compressed air in the small cylinder chamber 21 through the inner piston 60. Through the double compression method, high-pressure compressed gas can be generated to inflate the object to a higher air pressure.

[0067] The utility model uses the main body as the main cylinder of the air pump, and the piston tube as the small cylinder of the air pump. The piston rod drives the reciprocating action of the piston and the position change of the inner piston relative to the piston rod. At the same time, the cylinder chambers of the two different cylinder bodies of the main cylinder and the small cylinder are respectively replenished with air and compressed air, which can increase the flow rate of the inflation gas. Compared with the conventional air pump that only has a single stroke for air compression, the air pump of the utility model can increase the flow rate of inflation and increase the use efficiency; in addition, the piston rod can relatively drive the piston to move forward to the extreme position at the bottom of the main body, which can maximize the effectiveness of the entire air pump; furthermore, the compressed air can perform a double compression action through the piston and the inner piston, and the pressure value of the compressed air can be increased to form higher-pressure compressed air.

[0068] The above embodiments are only for explaining the technical means of the utility model and are not limiting. Any equivalent modifications of the utility model shall be deemed as the protection scope of the utility model. The upright air pump of the utility model is the first structure in this field and has improved practical effects. The application is filed in accordance with the law.

Claims

1. An upright air pump, Features: Contains: A main body is a cylinder body, having an air inlet end and an air outlet end; the air inlet end is provided with an opening, and the air outlet end is provided with an air outlet; a top cover is provided on the opening, a through hole is provided in the center of the top cover, and an air pipe is connected to the air outlet; A piston rod is a hollow tube, which is arranged in the body and can be displaced along the axial direction of the body. A piston is arranged at one end of the piston tube, and the piston is arranged in the body, so that the space in the body forms a first air chamber and a second air chamber; a connecting hole is arranged near the piston position of the piston rod to communicate with the inside of the piston rod; the other end of the piston rod is closed; A connecting pipe is a hollow tube with a flow channel formed inside. One end of the connecting pipe is fixedly connected to the gas outlet end of the body and communicated with the gas outlet, and the other end is provided with an inner piston. The connecting pipe penetrates into the piston rod, and the inner piston divides the space inside the piston rod into a third air chamber and a fourth air chamber. The connecting hole of the piston rod communicates with the second air chamber and the third air chamber. The fourth air chamber is communicated with the flow channel of the connecting pipe. a non-return assembly, arranged at the end of the connecting pipe, the non-return assembly prevents the gas in the flow channel of the connecting pipe from flowing out; the gas in the fourth air chamber can flow into the flow channel of the connecting pipe through the non-return assembly; When the piston moves toward the first air chamber, air can flow from the first air chamber into the second air chamber, and the fourth air chamber is compressed by the inner piston, so that the gas in the fourth air chamber enters the flow channel; when the piston moves toward the second air chamber, gas enters the first air chamber from the outside and compresses the gas in the second air chamber, and the gas in the second air chamber enters the third air chamber and the fourth air chamber from the connecting hole of the piston rod.

2. The upright air pump according to claim 1, Features: The outer peripheral surface of the piston is concavely provided with an outer ring groove, and the outer ring groove is provided with at least one notch on the side wall close to the second air chamber; a sealing ring is sleeved in the outer ring groove.

3. The upright air pump according to claim 1, Features: The non-return component is arranged between one end of the connecting pipe and the inner piston. The non-return component is provided with a non-return seat connected to the connecting pipe. The non-return seat is provided with an air inlet hole communicating with the flow channel; a non-return plate is arranged between the non-return seat and the inner piston, and an air guide hole is arranged in the center of the inner piston. The non-return plate can connect or close the air inlet hole and the air guide hole.

4. The upright air pump according to claim 3, Features: The anti-return seat is provided with an air guide portion around the air inlet, and the air guide portion has at least one air guide groove connected with the air inlet, and when the anti-return plate is pressed against the air guide portion, the air guide hole will be connected with the air inlet.

5. The upright air pump according to claim 3, Features: The check assembly is arranged below the inner piston; an actuating chamber is arranged at the bottom of the inner piston, and the check plate is arranged in the actuating chamber.

6. An upright air pump as claimed in claim 3 or 4, Features: The outer peripheral surface of the inner piston is provided with an annular groove, in which an airtight ring is slidably arranged, and the end surface of the inner piston is provided with at least one recessed portion communicating with the annular groove.

7. The upright air pump according to claim 1, Features: One end of the piston rod passes through the body; a handle is arranged on the end of the piston rod passing through the body.

8. The upright air pump according to claim 1, Features: The air outlet end of the main body further includes a bottom plug, the air outlet is arranged at the top end of the bottom plug, and the bottom plug is provided with a valve hole, which is communicated with the air outlet; a connecting valve is penetrated in the valve hole and is provided with an air hole connected with the air outlet, and the air hole is connected with the air pipe.

9. The upright air pump according to claim 1, Features: A through hole is formed in the center of the piston; the connecting pipe penetrates into the piston rod through the through hole.

10. The upright air pump according to claim 1, Features: The utility model further comprises a pedal which is arranged outside the air outlet end of the main body.

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