Inflation pump capable of preventing excessive inflation

Abstract

The invention relates to the technical field of inflator pumps, in particular to an inflator pump capable of preventing excessive inflation. The invention discloses an inflator pump capable of preventing excessive inflation, which comprises an inflator pump body, an air delivery port of the inflator pump body is provided with a protection assembly, the protection assembly comprises a connecting pipe, one end of the connecting pipe is connected with the air delivery port of the inflator pump body, and the other end of the connecting pipe is connected with a buffer pipe. According to the device, the protection assembly is arranged, the second blocking unit is adjusted through the driving force of gas, the pressure of the second blocking unit on the partition plate is intermittently reduced, then the gas in the first gas bin intermittently enters the second gas bin, then the gas intermittently enters an inflation object, and compared with a traditional continuous inflation mode, the inflation efficiency is greatly improved. The intermittent inflation mode of the inflator pump can protect an inflation object, and the situation that inflation is too much at a time is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of air pumps, in particular to an air pump that prevents over-inflation. Background Art

[0002] The air pump, also known as an air pump, an air pump, or an air pump works by the operation of a motor. When the motor rotates, it drives the piston to reciprocate, thereby achieving the output of gas.

[0003] When using an air pump to inflate a tire, people need to wait quietly for a while. When the air pressure inside the tire returns to normal, they can then turn off the air pump and remove the air nozzle of the air pump. However, during the waiting process, if people fail to turn off the air pump in time, the air pressure inside the tire may be too high, which may cause the tire to explode and pose a great threat to people's safety. How to prevent the tire from exploding due to excessive air pressure during tire inflation has become an important issue.

[0004] For example, Chinese patent application number CN111828284B discloses a mobile tire air pump mechanism that prevents over-inflation. When the internal air pressure of the tire reaches a normal value, the piston rod drives the extrusion block to move downward, so that the extrusion block squeezes the right side of the moving block, and further makes the moving block squeeze the contact, so that the air pump stops working, thereby achieving the effect of preventing the tire from exploding due to excessive air pressure during tire inflation.

[0005] Although the above-mentioned air pump can protect the inflated object from over-inflation, the air pump can only inflate a single inflatable object. If the inflatable object is changed, it is no longer suitable because different inflatable objects require different pressures. The above-mentioned air pump has limitations when used;

[0006] In addition, the above-mentioned air pump utilizes the piston rod to drive the extrusion block to move downward, so that the extrusion block squeezes the right side of the movable block, and further makes the movable block squeeze the contact, which is electrically connected to the stop button of the air pump to stop the air pump, thereby achieving the effect of preventing the tire from exploding due to excessive air pressure during tire inflation; however, if the electrical connection between the contact and the stop button of the air pump fails, the air pump cannot stop working and will continue to inflate, which will inevitably cause over-inflation, explosion of the inflated object, and even damage to the air pump. This is a technical issue that must be considered, and such a protective measure has a high risk.

[0007] To this end, we propose an air pump that prevents over-inflation. Summary of the invention

[0008] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides an air pump that prevents over-inflation.

[0009] The technical solution adopted by the present invention is as follows: the present invention is an air pump for preventing over-inflation, comprising an air pump body, a gas delivery port of the air pump body being provided with a protection component, the protection component comprising a connecting pipe, one end of the connecting pipe being connected to the gas delivery port of the air pump body, the other end of the connecting pipe being connected to a buffer pipe, the other end of the buffer pipe being connected to an inflation pipe, the buffer pipe being connected to the connecting pipe through a valve port 1, and the buffer pipe being connected to the inflation pipe through a valve port 2;

[0010] The protection component includes a partition fixedly arranged on the inner circumferential surface of the buffer tube, a gas diffusion port is opened on the partition, a gas bin 1 is on the left side of the partition, a gas bin 2 is on the right side of the partition, the gas diffusion port connects the gas bin 1 and the gas bin 2, a plugging unit 1 for closing the valve port 1 is arranged in the gas bin 1, and a plugging unit 2 for plugging the gas diffusion port on the partition is arranged in the gas bin 2;

[0011] The protection component also includes an air pressure regulating unit and a pressure relief unit. The air pressure regulating unit is arranged at the top of the buffer tube and is connected to the air bin one. The pressure relief unit is arranged on the right side of the buffer tube. The pressure relief unit is connected to the air pressure regulating unit through a pipeline and is transmission connected to the blocking unit two.

[0012] Furthermore, the blocking unit 1 includes a first spring and a blocking plate 1, one end of the first spring is fixed to the left side of the partition, and the blocking plate 1 is fixed to the other end of the first spring and blocks the valve port 1.

[0013] Furthermore, the second blocking unit includes a second spring, a second blocking plate and a movable plate, the upper portion of the movable plate is threadedly sleeved with a screw rod, the lower portion of the movable plate is slidably sleeved with a guide rod, the screw rod and the guide rod are parallel to each other, one end of the screw rod is rotatably arranged on the right side of the partition through a bearing, the other end of the screw rod is rotatably arranged through a bearing to penetrate the right side wall of the buffer tube, the guide rod is fixed between the partition and the right side wall of the buffer tube, one end of the second spring is fixedly arranged on the left side of the movable plate, the second blocking plate is fixedly arranged on the other end of the second spring, the second blocking plate is in contact with the right side of the partition and covers the air dispersion port on the partition; the pressure relief unit is connected to one end of the screw rod that penetrates the right side wall of the buffer tube.

[0014] Furthermore, the buffer tube is a transparent tubular structure made of a transparent material, and a scale line one is provided on the side wall of the buffer tube, and the movable plate corresponds to the scale line one.

[0015] Furthermore, the air pressure regulating unit includes a sealing unit three, an exhaust pipe and an adjusting cap. The bottom end of the exhaust pipe is connected to the top of the buffer tube and is connected to the air tank one. The adjusting cap is threadedly sleeved on the top of the exhaust pipe. A valve port three is provided at the connection between the exhaust pipe and the buffer tube. The sealing unit three is arranged on the adjusting cap and extends into the exhaust pipe to seal the valve port three.

[0016] Furthermore, the sealing unit three includes a pressure cylinder, an extrusion rod, a sealing ball, a sliding plate and a third spring. The pressure cylinder rotates through the top of the adjusting cap through a sealed bearing, and the bottom end of the extrusion rod slides through the bottom wall of the pressure cylinder. The sliding plate is slidably arranged in the pressure cylinder and is fixedly connected to the top of the extrusion rod. The third spring is in contact between the sliding plate and the top wall of the pressure cylinder. The sealing ball is fixedly connected to the bottom end of the extrusion rod and seals valve port three.

[0017] Furthermore, the blocking unit three also includes a limit rod, one end of which is fixed on the side wall of the pressure cylinder, and a limit groove is opened on the inner wall of the exhaust pipe to slide with the other end of the limit rod; a pointer is fixed on the outer wall of the pressure cylinder, and a scale line 2 is provided on the top of the adjustment cap, the pointer corresponds to the scale line 2, and the adjustment cap is made of transparent material.

[0018] Furthermore, the air pressure regulating unit also includes an air supply pipe, one end of which is connected to the top of the pressure cylinder via a rotary joint, and the other end of which is connected to the pressure relief unit.

[0019] Further, the pressure relief unit includes a pressure relief cylinder, a piston and a fourth spring, the pressure relief cylinder is fixedly arranged on the right side of the top of the buffer tube, the piston is slidably sealed in the pressure relief cylinder, the fourth spring abuts between the piston and the right side wall of the pressure relief cylinder, a pressure relief hole is opened on the top of the pressure relief cylinder, a button is installed on the right inner wall surface of the pressure relief cylinder, the piston contacts the button when moving to the right side of the pressure relief hole, and the left end of the pressure relief cylinder is connected to the gas supply pipe;

[0020] The pressure relief unit also includes a rack, one end of which is fixed on the right side of the piston, and the other end of the rack slides through the right end of the pressure relief cylinder, and the rack passes through the inside of the fourth spring. A transmission unit is also provided on the right side wall of the buffer tube, and the rack is transmission-connected to one end of the screw rod that passes through the right side wall of the buffer tube through the transmission unit; a through hole is opened on the piston, and a one-way valve is connected to the right end of the through hole.

[0021] Furthermore, the transmission unit includes a worm, a worm wheel, a bearing seat and a gear. The bearing seat is fixedly mounted on the right side wall of the buffer tube, the worm is rotatably mounted on the bearing seat, the worm wheel is fixedly mounted on the right end of the screw rod, the bottom end of the worm is meshed with the worm wheel, the gear is rotatably mounted on the top end of the worm through a one-way bearing, and the rack is meshed with the gear when it moves to the right.

[0022] The beneficial effects achieved by the present invention using the above structure are as follows:

[0023] 1. The present invention can prevent different inflatables from being over-inflated by providing a protective component, divide the buffer tube into gas chamber one and gas chamber two by providing a partition, and make the gas in gas chamber one selectively enter gas chamber two to inflate the inflatable or enter the pressure relief unit through the gas pressure regulating unit to release air by the pressure difference cooperation between the air pressure regulating unit and the plugging unit two, and make use of the driving force of the gas to adjust the plugging unit two so that the pressure of the plugging unit two on the partition is intermittently reduced, thereby making the gas in gas chamber one intermittently enter gas chamber two, and then intermittently enter the inflatable. Compared with the traditional continuous inflation method, the intermittent inflation method of the present air pump can protect the inflatable and avoid excessive inflation at one time; at the same time, through the provided pressure relief unit, when the inflation amount of the inflatable reaches the standard, the pressure relief unit will automatically release the pressure and turn off the air pump to further prevent the inflatable from being over-inflated.

[0024] 2. The present invention sets up a second sealing unit and utilizes the elastic force of the second spring to make the second sealing plate contact with the partition and seal the air vent on the partition, thereby achieving the effect of preventing gas leakage in the inflatable object. Only when the air pressure in the air bin one is greater than the air pressure in the air bin two, the second sealing plate will be opened and the inflatable object will be inflated at this time. By cooperating with the thread of the movable plate through the set screw rod, the position of the movable plate in the air bin two can be adjusted, and then the compression degree of the second spring can be adjusted, so that the squeezing force of the second sealing plate on the partition can be adjusted, and then the safe air pressure entering different inflatable objects can be adjusted.

[0025] 3. The present invention uses the elastic force of the third spring through the air pressure regulating unit to press the sealing ball against the valve port three. Only when the air pressure in gas chamber one is greater than the air pressure in the exhaust pipe, and the air pressure in gas chamber two is greater than the air chamber in gas chamber one, the sealing ball will be flushed open by the gas. By cooperating with the thread of the exhaust pipe through the setting of the adjusting cap, the adjusting cap can be moved on the exhaust pipe, and then the compression degree of the third spring can be adjusted, and then the squeezing pressure of the sealing ball on the valve port three can be adjusted, so that when the air pressure in gas chamber two reaches the safe air pressure, the gas output by the inflation pump can flush the sealing ball and be discharged into the pressure relief unit for deflation, so as to prevent the inflatable object from being over-inflated.

[0026] 3. The present invention cooperates with the pressure relief unit, the transmission unit and the air pressure regulating unit. When gas enters the exhaust pipe, the gas enters the gas supply pipe through the rotary joint, and then enters the pressure relief cylinder, pushing the piston to move, thereby driving the rack to move, thereby driving the gear to rotate, thereby driving the worm to rotate, thereby driving the worm wheel and the screw rod to rotate, thereby driving the movable plate to move, thereby achieving the technical effect of adjusting the compression degree of the second spring, so that the squeezing force of the sealing plate two on the partition plate can be adjusted, so that the air pressure of the gas chamber two gradually increases to the safe air pressure of the inflatable object, and thereby the gas in the gas chamber one can intermittently break open the sealing plate two that gradually reduces the squeezing force, thereby achieving the purpose of intermittently inflating the inflatable object and preventing the inflatable object from being over-inflated. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 It is a three-dimensional structural schematic diagram of the protection component of the present invention;

[0030] Figure 3 is a cross-sectional view of the protection assembly of the present invention;

[0031] Figure 4 for Figure 3 Schematic diagram of the three-dimensional structure;

[0032] Figure 5 It is a connection diagram of the air pressure regulating unit and the pressure relief unit of the present invention;

[0033] Figure 6 is a cross-sectional view of the air pressure regulating unit of the present invention;

[0034] Figure 7 for Figure 4 Enlarged view of point C;

[0035] Figure 8 for Figure 4 The enlarged view of point D;

[0036] Fig. 9 for Figure 2 A magnified image of point A;

[0037] Fig.10 for Figure 3 A magnified view of point B;

[0038] Fig.11 for Figure 7 The enlarged view of point E;

[0039] Among them, 1. Air pump body, 2. Protection component, 3. Sealing unit 1, 4. Sealing unit 2, 5. Air pressure regulating unit, 6. Pressure relief unit, 7. Connecting pipe, 8. Buffer pipe, 9. Valve port 1, 10. Valve port 2, 11. Partition, 12. Air outlet, 13. Air chamber 1, 14. Air chamber 2, 15. Air filling pipe, 31. First spring, 32. Sealing plate 1, 41. Second spring, 42. Sealing plate 2, 43. Moving plate, 44. Screw rod, 45. Guide rod, 51. Sealing unit 3, 52. Exhaust pipe, 53. Adjusting cap, 54, valve port three, 55, air pipe, 56, rotary joint, 511, pressure cylinder, 512, extrusion rod, 513, blocking ball, 514, sliding plate, 515, third spring, 516, limit rod, 517, limit groove, 518, pointer, 61, pressure relief cylinder, 62, piston, 63, fourth spring, 64, pressure relief hole, 65, button, 66, rack, 67, transmission unit, 68, one-way valve, 69, through hole, 671, worm, 672, worm wheel, 673, bearing seat, 674, gear. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0041] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0042] like Figure 1-Figure 4 As shown, an air pump for preventing over-inflation of the present invention comprises an air pump body 1, a protective assembly 2 is provided at the air delivery port of the air pump body 1, the protective assembly 2 comprises a connecting pipe 7, one end of the connecting pipe 7 is connected to the air delivery port of the air pump body 1, the other end of the connecting pipe 7 is connected to a buffer pipe 8, the other end of the buffer pipe 8 is connected to an inflation pipe 15, the buffer pipe 8 is connected to the connecting pipe 7 through a valve port 1 9, and the buffer pipe 8 is connected to the inflation pipe 15 through a valve port 2 10;

[0043] The protection component 2 includes a partition 11 fixedly arranged on the inner circumference of the buffer tube 8, and a gas diffusion port 12 is opened on the partition 11. The left side of the partition 11 is a gas storage 13, and the right side of the partition 11 is a gas storage 2 14. The gas diffusion port 12 connects the gas storage 13 and the gas storage 2 14. The gas storage 13 is provided with a blocking unit 13 for closing the valve port 19, and the gas storage 2 14 is provided with a blocking unit 2 4 for blocking the gas diffusion port 12 on the partition 11;

[0044] The protection component 2 also includes an air pressure regulating unit 5 and a pressure relief unit 6. The air pressure regulating unit 5 is arranged on the top of the buffer tube 8 and is connected to the air tank 13. The pressure relief unit 6 is arranged on the right side of the buffer tube 8. The pressure relief unit 6 is connected to the air pressure regulating unit 5 through a pipeline and is transmission-connected to the blocking unit 2 4.

[0045] The buffer tube 8 is divided into an air chamber 13 and an air chamber 2 14 by the provided partition 11, and the pressure difference between the air pressure regulating unit 5 and the blocking unit 2 4 is coordinated to make the gas in the air chamber 13 selectively enter the air chamber 2 14 to inflate the inflatable object or enter the pressure relief unit 6 through the air pressure regulating unit 5 to release the gas. By cooperating with the provided air pressure regulating unit 5, the pressure relief unit 6 and the blocking unit 2 4, the blocking unit 2 4 is adjusted by utilizing the driving force of the gas, so that the pressure of the blocking unit 2 4 on the partition 11 is intermittently reduced, thereby making the gas in the air chamber 13 intermittently enter the air chamber 2 14, and then intermittently enter the inflatable object. Compared with the traditional continuous inflation method, the intermittent inflation method of the air pump can protect the inflatable object and avoid excessive inflation at one time; at the same time, through the provided pressure relief unit 6, when the inflation amount of the inflatable object reaches the standard, the pressure relief unit 6 will automatically release the pressure and turn off the air pump to further prevent excessive inflation of the inflatable object.

[0046] like Figure 1-Figure 4 As shown, the blocking unit 3 includes a first spring 31 and a blocking plate 32, one end of the first spring 31 is fixed to the left side of the partition 11, and the blocking plate 32 is fixed to the other end of the first spring 31 and blocks the valve port 9.

[0047] By setting a blocking unit 3, the gas output from the inflation pump body 1 breaks through the blocking plate 32 and enters the air chamber 13. When inflation is not needed, the blocking plate 32 blocks the valve port 9 under the pressure of the first spring 31, thereby preventing the gas in the inflatable object from leaking.

[0048] like Figure 1-Figure 4As shown, the blocking unit 4 includes a second spring 41, a blocking plate 42 and a moving plate 43. A screw rod 44 is threadedly sleeved on the upper part of the moving plate 43, and a guide rod 45 is slidably sleeved on the lower part of the moving plate 43. The screw rod 44 and the guide rod 45 are parallel to each other. One end of the screw rod 44 is rotatably arranged on the right side of the partition 11 through a bearing, and the other end of the screw rod 44 is rotatably passed through the right side wall of the buffer tube 8 through a bearing. The guide rod 45 is fixedly arranged between the partition 11 and the right side wall of the buffer tube 8. One end of the second spring 41 The end is fixed on the left side of the movable plate 43, and the blocking plate 42 is fixed on the other end of the second spring 41. The blocking plate 42 is in contact with the right side of the partition 11 and covers the air diffusion port 12 on the partition 11; the pressure relief unit 6 is connected to one end of the screw rod 44 that passes through the right side wall of the buffer tube 8; the buffer tube 8 is a transparent tubular structure made of transparent material, and a scale line 1 is provided on the side wall of the buffer tube 8, and the movable plate 43 corresponds to the scale line 1. The buffer tube 8 made of transparent material makes it convenient to observe the alignment position of the movable plate 43 and the scale line 1.

[0049] By setting up the blocking unit 24 and utilizing the elastic force of the second spring 41, the blocking plate 242 is pressed against the partition 11 and the air vent 12 on the partition 11 is blocked, thereby further preventing the gas in the inflatable object from leaking. Only when the air pressure in the air bin 13 is greater than the air pressure in the air bin 2 14 (that is, the air pressure in the inflatable object, because the inflatable object is connected to the air bin 2 14), the blocking plate 242 will be opened and the inflatable object will be inflated at this time. By means of the screw rod 44 being matched with the thread of the movable plate 43, the position of the movable plate 43 in the air bin 2 14 can be adjusted, thereby adjusting the compression degree of the second spring 41, so that the squeezing force of the blocking plate 2 42 on the partition 11 can be adjusted.

[0050] like Figure 5-Figure 7 , Fig.11 As shown, the air pressure regulating unit 5 includes a blocking unit 3 51, an exhaust pipe 52 and an adjusting cap 53. The bottom end of the exhaust pipe 52 is connected to the top of the buffer pipe 8 and is connected to the gas chamber 13. The adjusting cap 53 is threadedly sleeved on the top of the exhaust pipe 52. A valve port 3 54 is provided at the place where the exhaust pipe 52 and the buffer pipe 8 are connected. The blocking unit 3 51 is provided on the adjusting cap 53 and extends into the exhaust pipe 52 to block the valve port 3 54.

[0051] The blocking unit three 51 includes a pressure cylinder 511, an extrusion rod 512, a blocking ball 513, a sliding plate 514 and a third spring 515. The pressure cylinder 511 rotates through the top of the adjusting cap 53 through a sealed bearing, and the bottom end of the extrusion rod 512 slides through the bottom wall of the pressure cylinder 511. The sliding plate 514 is slidably arranged in the pressure cylinder 511 and is fixedly connected to the top of the extrusion rod 512. The third spring 515 is in contact between the sliding plate 514 and the top wall of the pressure cylinder 511. The blocking ball 513 is fixedly connected to the bottom end of the extrusion rod 512 and blocks the valve port three 54.

[0052] By means of the air pressure regulating unit 5, the elastic force of the third spring 515 is utilized to press the sealing ball 513 against the valve port three 54. Only when the air pressure in the air chamber one 13 is greater than the air pressure in the exhaust pipe 52, and at the same time the air pressure in the air chamber two 14 is greater than the air chamber in the air chamber one 13, the sealing ball 513 will be flushed open by the gas. By means of the adjustment cap 53 that is provided and the threaded cooperation with the exhaust pipe 52, the adjustment cap 53 can be moved on the exhaust pipe 52, and then the compression degree of the third spring 515 can be adjusted, and then the squeezing force of the sealing ball 513 on the valve port three 54 can be adjusted.

[0053] like Figure 1-Figure 7 , Fig.11 As shown, the blocking unit three 51 also includes a limiting rod 516, one end of which is fixed on the side wall of the pressure cylinder 511, and a limiting groove 517 is opened on the inner wall of the exhaust pipe 52 to slide with the other end of the limiting rod 516; a pointer 518 is fixed on the outer wall of the pressure cylinder 511, and a scale line 2 is provided on the top of the adjusting cap 53, the pointer 518 corresponds to the scale line 2, and the adjusting cap 53 is made of transparent material.

[0054] like Figure 1-Figure 7 , Fig.11 As shown, the air pressure regulating unit 5 also includes an air supply pipe 55, one end of which is connected to the top of the pressure cylinder 511 through a rotary joint 56, and the other end of the air supply pipe 55 is connected to the pressure relief unit 6. Through the set air supply pipe 55, the gas entering the exhaust pipe 52 is transported to the pressure relief unit 6, driving the pressure relief unit 6 to work.

[0055] like Figure 1-Figure 10 As shown, the pressure relief unit 6 includes a pressure relief cylinder 61, a piston 62 and a fourth spring 63. The pressure relief cylinder 61 is fixedly arranged on the right side of the top of the buffer tube 8. The piston 62 is slidably sealed in the pressure relief cylinder 61. The fourth spring 63 abuts between the piston 62 and the right side wall of the pressure relief cylinder 61. A pressure relief hole 64 is opened on the top of the pressure relief cylinder 61. A button 65 is installed on the right inner wall surface of the pressure relief cylinder 61. When the piston 62 moves to the right side of the pressure relief hole 64, it contacts the button 65. The left end of the pressure relief cylinder 61 is connected to the gas supply pipe 55.

[0056] The pressure relief unit 6 also includes a rack 66, one end of which is fixedly arranged on the right side of the piston 62, and the other end of the rack 66 slides through the right end of the pressure relief cylinder 61, and the rack 66 passes through the inside of the fourth spring 63. A transmission unit 67 is also provided on the right side wall of the buffer tube 8, and the rack 66 is transmission-connected to one end of the screw rod 44 that passes through the right side wall of the buffer tube 8 through the transmission unit 67; a through hole 69 is provided on the piston 62, and a one-way valve 68 is connected to the right end of the through hole 69. Through the setting of the one-way valve 68, when the piston 62 moves to the left, the gas on the left side of the pressure relief cylinder 61 can be discharged through the through hole 69 and the one-way valve 68.

[0057] like Figure 1-Figure 10 As shown, the transmission unit 67 includes a worm 671, a worm wheel 672, a bearing seat 673 and a gear 674. The bearing seat 673 is fixedly arranged on the right side wall of the buffer tube 8. The worm 671 is rotatably mounted on the bearing seat 673. The worm wheel 672 is fixedly arranged on the right end of the screw rod 44. The bottom end of the worm 671 is meshed with the worm wheel 672. The gear 674 is rotatably mounted on the top of the worm 671 through a one-way bearing. When the rack 66 moves right, it meshes with the gear 674. Through the cooperation between the pressure relief unit 6, the transmission unit 67 and the air pressure regulating unit 5, when there is gas When entering the exhaust pipe 52, the gas enters the pressure cylinder 511 through the gap between the extrusion rod 512 and the pressure cylinder 511. There is also a gap between the sliding plate 514 and the pressure cylinder 511. The gas then enters the gas pipe 55 through the rotary joint 56, and then enters the pressure relief cylinder 61, pushing the piston 62 to move, thereby driving the rack 66 to move, thereby driving the gear 674 to rotate, thereby driving the worm 671 to rotate, thereby driving the worm wheel 672 and the screw rod 44 to rotate, thereby driving the moving plate 43 to move, thereby achieving the technical effect of adjusting the compression degree of the second spring 41.

[0058] When in use, first rotate the adjusting cap 53 to move the adjusting cap 53 up and down, thereby adjusting the height of the pressure cylinder 511, and then the compression degree of the third spring 515 can be adjusted, and then the squeezing force of the sealing ball 513 to seal the valve port three 54 can be adjusted. When the adjusting cap 53 is rotated, the pointer 518 points to the scale line two representing different air pressure values; then, turn the manual rotating worm 671 to drive the worm wheel 672 to rotate, drive the screw rod 44 to rotate, and drive the movable plate 43 to move, so as to adjust the compression degree of the second spring 41, and then adjust the squeezing force of the sealing plate two 42 to seal the air holes on the partition 11. The movable plate 43 points to the scale line one representing different air pressure values. The initial adjustment state is: the air pressure of the gas to break open the sealing plate two 42 is less than the air pressure required for the gas to break open the sealing ball 513; it should be noted that the air pressure required for the gas to break open the sealing ball 513 and drive the piston 62 to move to the far right is the safety air pressure of the inflatable;

[0059] After adjusting the air pressure value, insert the inflation head on the inflation tube 15 into the inflatable object that needs to be inflated, connect the power supply of the inflation pump body 1, and press the start button 65 on the inflation pump body 1. At this time, the inflation pump body 1 is started, because one end of the connecting tube 7 is connected to the gas delivery port of the inflation pump body 1. At this time, the gas output by the inflation pump body 1 enters the connecting tube 7, and the gas squeezes the sealing plate 1 32 to move right, and compresses the first spring 31, and the gas enters the gas chamber 1 13. At this time, the gas will break through the sealing plate 2 42 through the gas diffusion port 12 and enter the gas chamber 2 14, and enter the inflatable object through the inflation tube 15 and the inflation head. When the air pressure in the inflatable increases, it will reversely squeeze the blocking plate 42, so that the blocking plate 42 will re-seal the air outlet 12. At this time, the gas in the air chamber 13 will break the blocking ball 513 and enter the exhaust pipe 52. Then the gas passes through the gap between the squeezing rod 512 and the pressure cylinder 511 and enters the pressure cylinder 511. Then, the gas passes through the rotating joint 56 and the air supply pipe 55 and enters the pressure relief cylinder 61, and pushes the piston 62 to move right. The fourth spring 63 is squeezed, thereby driving the rack 66 to move right. The rack 66 moves right and drives the gear 674 to rotate. Since the gear 674 is connected to the one-way bearing The gear 674 drives the worm 671 to rotate, drives the worm wheel 672 to rotate, and then drives the screw rod 44 to rotate. At this time, the screw rod 44 drives the movable plate 43 to move right, releasing the compression degree of the second spring 41. At this time, the extrusion force of the blocking plate 42 on the partition 11 is reduced, and it is reduced to the point that the gas in the gas chamber 13 can break open the blocking plate 42, and at this time, under the rebound action of the fourth spring 63, the piston 62 moves left and resets. Under the rebound action of the third spring 515, the plugger resets and re-blocks the valve port 3 54. When the gas breaks open the blocking plate 42 again, the gas The gas in the first chamber 13 enters the second chamber 14 again, and the inflatable object is inflated again. The air pressure in the inflatable object increases again, and it will squeeze the second sealing plate 42 in the opposite direction again, so that the second sealing plate 42 blocks the air outlet 12 again. At this time, the gas in the first chamber 13 breaks through the sealing ball 513 again and enters the exhaust pipe 52. The gas pushes the piston 62 to move again, and drives the gear 674, the worm 671, the worm wheel 672 and the screw rod 44 to rotate again, and drives the moving plate 43 to move right again, and releases the compression degree of the second spring 41 again. The gas in the first chamber 13 breaks through the second sealing plate 42 again.

[0060] By repeating the above-mentioned inflation process, the air pressure in the inflatable object will gradually increase intermittently, thereby achieving the purpose of intermittent inflation and further preventing the inflatable object from being over-inflated. Compared with the traditional continuous inflation method, the intermittent inflation method of the present air pump can protect the inflatable object and avoid over-inflation at one time. The air pressure in the inflatable object increases to the point where the gas in the air chamber 13 no longer breaks through the sealing plate 2 42, but only breaks through the sealing ball 513, thereby driving the piston 62 to move right to the right side of the pressure relief hole 64 and contacting the button 65. At this time, the gas is discharged from the pressure relief hole 64. At the same time, the button 65 is electrically connected to the stop button 65 on the air pump body 1. After the button 65 is pressed, the air pump body 1 stops working, thereby achieving the effect of preventing the inflatable object from exploding due to excessive air pressure when inflating. Even if the button 65 fails and the pressure relief hole 64 exists, the inflatable object will not be over-inflated.

[0061] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0062] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0063] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An air pump for preventing over-inflation, characterized in that: The invention comprises an air pump body (1), wherein the air delivery port of the air pump body (1) is provided with a protection component (2), wherein the protection component (2) comprises a connecting pipe (7), wherein one end of the connecting pipe (7) is connected to the air delivery port of the air pump body (1), the other end of the connecting pipe (7) is connected to a buffer pipe (8), the other end of the buffer pipe (8) is connected to an air filling pipe (15), the buffer pipe (8) is connected to the connecting pipe (7) through a valve port 1 (9), and the buffer pipe (8) is connected to the air filling pipe (15) through a valve port 2 (10); The protection component (2) comprises a partition (11) fixedly arranged on the inner circumference of the buffer tube (8), the partition (11) is provided with a gas diffusion port (12), the left side of the partition (11) is a gas chamber 1 (13), the right side of the partition (11) is a gas chamber 2 (14), the gas diffusion port (12) communicates with the gas chamber 1 (13) and the gas chamber 2 (14), the gas chamber 1 (13) is provided with a blocking unit 1 (3) for closing the valve port 1 (9), and the gas chamber 2 (14) is provided with a blocking unit 2 (4) for blocking the gas diffusion port (12) on the partition (11); The protection component (2) further comprises an air pressure regulating unit (5) and a pressure relief unit (6); the air pressure regulating unit (5) is arranged at the top of the buffer tube (8) and is in communication with the air bin one (13); the pressure relief unit (6) is arranged on the right side of the buffer tube (8); the pressure relief unit (6) is connected to the air pressure regulating unit (5) via a pipeline and is in transmission connection with the blocking unit two (4).

2. An air pump for preventing over-inflation according to claim 1, characterized in that: The blocking unit (3) comprises a first spring (31) and a blocking plate (32), wherein one end of the first spring (31) is fixed to the left side of the partition (11), and the blocking plate (32) is fixed to the other end of the first spring (31) and blocks the valve port (9).

3. An air pump for preventing over-inflation according to claim 2, characterized in that: The second blocking unit (4) comprises a second spring (41), a second blocking plate (42) and a movable plate (43). A screw rod (44) is threadedly sleeved on the upper part of the movable plate (43). A guide rod (45) is slidably sleeved on the lower part of the movable plate (43). The screw rod (44) and the guide rod (45) are parallel to each other. One end of the screw rod (44) is rotatably arranged on the right side of the partition plate (11) through a bearing. The other end of the screw rod (44) is rotatably arranged on the right side of the buffer tube (8) through a bearing. side wall, the guide rod (45) is fixedly arranged between the partition (11) and the right side wall of the buffer tube (8), one end of the second spring (41) is fixedly arranged on the left side of the movable plate (43), the second sealing plate (42) is fixedly arranged on the other end of the second spring (41), the second sealing plate (42) is in contact with the right side of the partition (11) and covers the air diffusion port (12) on the partition (11); the pressure relief unit (6) is connected to one end of the screw rod (44) that passes through the right side wall of the buffer tube (8).

4. An air pump for preventing over-inflation according to claim 3, characterized in that: The buffer tube (8) is a transparent tubular structure made of a transparent material, and a scale line one is provided on the side wall of the buffer tube (8), and the movable plate (43) corresponds to the scale line one.

5. An air pump for preventing over-inflation according to any one of claims 1 to 4, characterized in that: The air pressure regulating unit (5) comprises a blocking unit three (51), an exhaust pipe (52) and an adjusting cap (53); the bottom end of the exhaust pipe (52) is connected to the top of the buffer pipe (8) and is connected to the air chamber one (13); the adjusting cap (53) is threadedly sleeved on the top of the exhaust pipe (52); a valve port three (54) is provided at the connection between the exhaust pipe (52) and the buffer pipe (8); the blocking unit three (51) is arranged on the adjusting cap (53) and extends into the exhaust pipe (52) to block the valve port three (54).

6. An air pump for preventing over-inflation according to claim 5, characterized in that: The blocking unit three (51) includes a pressure cylinder (511), an extrusion rod (512), a blocking ball (513), a sliding plate (514) and a third spring (515). The pressure cylinder (511) rotates through the top of the adjustment cap (53) through a sealing bearing, and the bottom end of the extrusion rod (512) slides through the bottom wall of the pressure cylinder (511). The sliding plate (514) is slidably arranged in the pressure cylinder (511) and is fixedly connected to the top of the extrusion rod (512). The third spring (515) is in contact between the sliding plate (514) and the top wall of the pressure cylinder (511). The blocking ball (513) is fixedly connected to the bottom end of the extrusion rod (512) and blocks the valve port three (54).

7. An air pump for preventing over-inflation according to claim 6, characterized in that: The blocking unit three (51) also includes a limiting rod (516), one end of which is fixedly arranged on the side wall of the pressure cylinder (511), and a limiting groove (517) is provided on the inner wall of the exhaust pipe (52) to slide with the other end of the limiting rod (516); a pointer (518) is fixedly arranged on the outer wall of the pressure cylinder (511), and a scale line 2 is arranged on the top of the adjustment cap (53), and the pointer (518) corresponds to the scale line 2, and the adjustment cap (53) is made of a transparent material.

8. An air pump for preventing over-inflation according to claim 6 or 7, characterized in that: The air pressure regulating unit (5) further comprises an air supply pipe (55), one end of which is connected to the top of the pressure cylinder (511) via a rotary joint (56), and the other end of which is connected to the pressure relief unit (6).

9. An air pump for preventing over-inflation according to claim 8, characterized in that: The pressure relief unit (6) comprises a pressure relief cylinder (61), a piston (62) and a fourth spring (63); the pressure relief cylinder (61) is fixedly arranged on the right side of the top of the buffer tube (8); the piston (62) is slidably sealed in the pressure relief cylinder (61); the fourth spring (63) abuts between the piston (62) and the right side wall of the pressure relief cylinder (61); a pressure relief hole (64) is opened on the top of the pressure relief cylinder (61); a button (65) is installed on the right inner wall surface of the pressure relief cylinder (61); when the piston (62) moves to the right side of the pressure relief hole (64), it contacts the button (65); the left end of the pressure relief cylinder (61) is connected to the air supply pipe (55); The pressure relief unit (6) further comprises a rack (66), one end of which is fixedly arranged on the right side of the piston (62), and the other end of which slides through the right end of the pressure relief cylinder (61), and the rack (66) passes through the inside of the fourth spring (63). A transmission unit (67) is also provided on the right side wall of the buffer tube (8), and the rack (66) is transmission-connected to one end of the screw rod (44) that passes through the right side wall of the buffer tube (8) through the transmission unit (67); a through hole (69) is provided on the piston (62), and a one-way valve (68) is connected to the right end of the through hole (69).

10. An air pump for preventing over-inflation according to claim 9, characterized in that: The transmission unit (67) comprises a worm (671), a worm wheel (672), a bearing seat (673) and a gear (674); the bearing seat (673) is fixedly arranged on the right side wall of the buffer tube (8); the worm (671) is rotatably mounted on the bearing seat (673); the worm wheel (672) is fixedly arranged on the right end of the screw rod (44); the bottom end of the worm (671) is meshed with the worm wheel (672); the gear (674) is rotatably mounted on the top end of the worm (671) via a one-way bearing; and the rack (66) is meshed with the gear (674) when it moves rightward.

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