Vehicle-mounted air pump convenient to use

Abstract

The invention relates to a vehicle-mounted air pump, in particular to a vehicle-mounted air pump convenient to use. The invention provides a vehicle-mounted air pump which is automatically inflated and convenient to use. A vehicle-mounted air pump convenient to use comprises a box body, a piston cylinder, a disc with a column, a servo motor, a hinge rod, a one-way valve and a one-way pipe, a double-layer inner cavity is formed in the box body, the servo motor is fixed to the upper-layer inner cavity and connected with the disc with the column, the disc with the column is located in the lower-layer inner cavity, and the piston cylinder is fixed to the lower-layer inner cavity. One end of the hinge rod is limited and rotated to the convex column of the disc with the column, the other end of the hinge rod is rotatably connected to a piston rod of the piston cylinder, the side face of the piston cylinder is connected with two one-way valves, one one-way valve is in an open state, and the other one-way valve is connected with a one-way pipe. The positioning motor is started to drive the worm to rotate, then the rotating shaft a is driven to rotate, the rotating shaft a drives the rotating shaft b to rotate reversely through the steering assembly, and the rotating shaft a and the rotating shaft b can guide the one-way pipe out of the box body or retract the one-way pipe through friction force.

Description

Technical Field

[0001] The invention relates to a vehicle-mounted air pump, in particular to a vehicle-mounted air pump that is easy to use. Background Art

[0002] A car air pump is a device that uses a motor to inflate the car using atmospheric pressure. When you encounter an emergency such as a flat tire while driving outdoors, you can use a car air pump to inflate the car tires promptly and quickly.

[0003] A Chinese patent with publication number CN208330649U discloses a portable vehicle-mounted air pump, including a support, an air pump barrel and a cylinder. The air pump barrel is arranged at the upper end of the support and is fixedly connected to the support. The cylinder is arranged on the left side of the support and is movably connected to the support. A pedal is movably connected to the front end of the support, and a movable rod is provided through the pedal and the front end of the support. A fixed shaft is tightly welded to the inner wall of the pedal, and two grooves are opened at the lower end of the fixed shaft. For this portable vehicle-mounted air pump, a user installs and fixes the upper surface of the air pump barrel on the inner walls of the two grooves provided in the fixed shaft, and simultaneously installs and fixes the two air pump barrels, then inserts the round shaft provided in the air pump barrel into the two through holes on the cross bar, and then screws the provided nut into the threaded ring by rotating. After the air pump barrel is installed and fixed, the user steps on the provided pedal. The user only needs to step down with his foot, and the pedal will be pressed downward through the movable rod.

[0004] During the inflation operation of the existing device, it is still necessary to manually perform a foot-pressing operation to perform the inflation operation, which still places a heavy burden on the personnel.

[0005] Therefore, based on the defects of the existing devices, the present invention aims to design a vehicle-mounted air pump that is easy to use. Summary of the invention

[0006] In order to overcome the shortcomings of existing devices that require a lot of manpower and are inconvenient to use, the present invention provides an automatic inflatable vehicle-mounted air pump that is easy to use.

[0007] A vehicle-mounted air pump that is easy to use includes a box body, a piston cylinder, a disc with a column, a servo motor, a hinged rod, a one-way valve and a one-way pipe. A double-layer inner cavity is opened in the box body. The servo motor is fixed to the upper inner cavity by bolts. The servo motor is connected to the disc with a column by a key. The disc with a column is located in the lower inner cavity. The piston cylinder is fixed to the lower inner cavity by bolts. One end of the hinged rod is limited to rotate at the convex column of the disc with a column, and the other end is rotatably connected to the piston rod of the piston cylinder. Two one-way valves in opposite directions are connected to the side of the piston cylinder, and one of the one-way valves is in an open state. state, another one-way valve is connected with a one-way tube, the one-way tube is coiled around the box and led out to the outside, the end of the one-way tube is connected with an inflation head, and also includes a positioning motor, a worm, a rotating shaft a, a worm wheel, a steering assembly and a rotating shaft b. The positioning motor is fixed in the box, and the output shaft of the positioning motor is connected with the worm through a coupling. The rotating shaft a and the rotating shaft b are arranged on the side of the box in a parallel state, and the worm wheel is connected to the rotating shaft a through a key. The worm and the worm wheel are meshed with each other, and the rotating shaft a transmits the transmission to the rotating shaft b through the steering assembly, and the one-way tube is frictionally connected between the rotating shaft a and the rotating shaft b.

[0008] More preferably, the steering assembly consists of a roller, two mutually meshing gears and a pulley set, the roller is parallel to the rotating shaft b and is rotatably connected to the side wall of the box, the two mutually meshing gears are respectively connected to the roller and the rotating shaft b by keys, and the pulley set is connected to the roller and the rotating shaft a.

[0009] More preferably, it further comprises a stress-bearing rod and an anti-slip sleeve, wherein the stress-bearing rod is connected to the upper part of the box body, and an anti-slip sleeve is arranged outside the stress-bearing rod.

[0010] More preferably, it also includes a cleaning frame, a positioning spring, a connecting plate, a slotted cylinder and a ball cam ring. The slotted cylinder is axially fixed to the end of the rotating shaft b, the end of the connecting plate is annular, the annular inner ring is fixed with a ball cam ring, the connecting plate is connected to the slotted cylinder through the ball cam ring, the side of the cleaning frame is fixed with a guide column, the guide column is slidably connected to the connecting plate, the positioning spring is sleeved on the guide column, and the end of the positioning spring is connected to the cleaning frame and the connecting plate.

[0011] More preferably, the cleaning frame is in a closed ring shape, and the one-way pipe passes through the cleaning frame.

[0012] More preferably, a closed curved groove is provided on the periphery of the slotted cylinder, and the ball convex ring is slidably connected in the groove.

[0013] More excellently, it also includes a stabilizer bar, a strut, a hydraulic cylinder, a fluid guide tube, a hydraulic box, an electromagnetic positioning seat and a magnetic ring. The hydraulic cylinder is fixedly connected to the outside of the box body, the hydraulic cylinder is symmetrically arranged, the hydraulic cylinder is vertically connected to the side of the box body, the hydraulic box is connected to the hydraulic cylinder through the fluid guide tube, the telescopic end of the hydraulic cylinder is rotatably connected to the stabilizer bar, the lower end of the hydraulic cylinder is rotatably connected to the strut, the strut and the stabilizer bar are T-hinged, the telescopic end of the hydraulic box is connected, the magnetic ring is keyed to the end of the rotating shaft a, the outside of the magnetic ring is magnetically connected to the electromagnetic positioning seat, a semicircular groove is provided on the outside of the box body, the semicircular groove can limit the rotation of the electromagnetic positioning seat, a protrusion is provided at the end of the electromagnetic positioning seat, and the telescopic end of the hydraulic box is slidably sleeved on the protrusion.

[0014] More preferably, it also includes a telescopic tube, a telescopic rod and a reset spring. The five telescopic tubes are staggered and fixed in the lower inner cavity of the box body. The telescopic rod is slidably connected in the telescopic tube. A reset spring is connected between the telescopic rod and the telescopic tube.

[0015] More preferably, it further comprises a fixed card block, wherein the fixed card block is fixedly connected to the side surface of the box body.

[0016] More preferably, it also includes a dustproof plate, which is arranged on the side of the box body. Beneficial Effects

[0017] 1. Turn on the positioning motor to drive the worm to rotate, and then drive the rotating shaft a to rotate. The rotating shaft a drives the rotating shaft b to rotate in the opposite direction through the steering assembly. The rotating shaft a and the rotating shaft b can lead the one-way tube out of the box or retract it through friction. Then turn on the servo motor to continuously drive the piston cylinder to introduce external air into the one-way tube. Compared with the existing device, this device realizes the effect of automatic inflation and automatic retraction and extension of the one-way tube.

[0018] 2. When the positioning motor is turned on to drive the one-way tube to be led out or retracted, the rotating shaft b will drive the slotted cylinder to rotate, and then drive the connecting plate to slide horizontally, thereby driving the cleaning frame to move back and forth. A brush is arranged inside the cleaning frame, and the brush can clean the surface of the one-way tube.

[0019] 3. When the one-way tube is led out of the box, the electromagnetic positioning seat can be rotated downward, so that the stabilizer bar can be rotated and unfolded. At this time, the stabilizer bar can support the box body, thereby improving the stability of the box body during inflation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of an embodiment of the present invention.

[0021] Figure 2 It is a schematic diagram of the structure of the piston cylinder in one embodiment of the present invention.

[0022] Figure 3 Schematic diagram of the structure of a one-way valve in an embodiment of the present invention.

[0023] Figure 4 Schematic diagram of the structure of the rotating shaft a in one embodiment of the present invention.

[0024] Figure 5 It is a schematic structural diagram of a cleaning frame in an embodiment of the present invention.

[0025] Figure 6 It is a schematic diagram of the structure of a ball convex ring in an embodiment of the present invention.

[0026] Figure 7 It is a schematic structural diagram of a stabilizer bar in an embodiment of the present invention.

[0027] Figure 8 It is a schematic diagram of the structure of an electromagnetic positioning seat in an embodiment of the present invention.

[0028] Fig. 9 Schematic diagram of the structure of a telescopic rod in an embodiment of the present invention.

[0029] Fig.10 It is a schematic diagram of the structure of a fixed card block in an embodiment of the present invention.

[0030] In the accompanying drawings: 1-box, 2-force rod, 21-anti-slip sleeve, 3-piston cylinder, 4-column disc, 5-servo motor, 6-hinged rod, 7-one-way valve, 8-one-way tube, 9-positioning motor, 91-worm, 92-rotating shaft a, 93-worm wheel, 94-steering assembly, 95-rotating shaft b, 10-brush frame, 101-positioning spring, 102-connecting plate, 103-slotted cylinder, 104-ball convex ring, 11-stabilizing rod, 111-support rod, 112-hydraulic cylinder, 113-liquid guide tube, 114-hydraulic box, 115-electromagnetic positioning seat, 116-magnetic ring, 12-telescopic cylinder, 13-telescopic rod, 14-reset spring, 15-fixed block, 16-dustproof plate. DETAILED DESCRIPTION

[0031] The present invention will be further described below in conjunction with the embodiments shown in the accompanying drawings. Example 1

[0032] A convenient vehicle air pump, such as Figure 1-Figure 5 , Figure 7-10As shown, it includes a box body 1, a piston cylinder 3, a column disc 4, a servo motor 5, a hinged rod 6, a one-way valve 7 and a one-way tube 8. A double-layer inner cavity is opened in the box body 1. The servo motor 5 is fixed to the upper inner cavity by bolts. The servo motor 5 is connected to the column disc 4 by a key. The column disc 4 is located in the lower inner cavity. The piston cylinder 3 is fixed to the lower inner cavity by bolts. One end of the hinged rod 6 is limited to rotate at the convex column of the column disc 4, and the other end is rotatably connected to the piston rod of the piston cylinder 3. Two one-way valves 7 in opposite directions are connected to the side of the piston cylinder 3, one of which is in an open state, and the other one-way valve 7 is connected to the one-way tube 8. The one-way tube 8 is coiled around the box body 1 and then led out to the outside. The end of the one-way tube 8 is connected to an inflation head. It also includes a positioning motor 9, a worm 91, a rotating shaft a92, a worm wheel 93, a steering assembly 94 and a rotating shaft b95. The positioning motor 9 is fixed in the box body 1, and the output shaft of the positioning motor 9 is connected to the one-way tube 8 by a coupling. The device is connected with a worm 91, and the rotating shaft a92 and the rotating shaft b95 are rotatably arranged in parallel on the side of the box body 1. The worm wheel 93 is connected to the rotating shaft a92 by a key. The worm 91 and the worm wheel 93 are meshed with each other. The rotating shaft a92 transmits the rotating shaft b95 through a steering assembly 94. The steering assembly 94 consists of a roller, two mutually meshing gears and a pulley group. The roller is parallel to the rotating shaft b95 and is rotatably connected to the side wall of the box body 1. The two mutually meshing gears are respectively connected to the roller and the rotating shaft b95 by keys. The pulley group is connected to the roller and the rotating shaft a92. The one-way tube 8 is frictionally connected between the rotating shaft a92 and the rotating shaft b95. Turning on the positioning motor 9 drives the worm 91 to rotate, and then drives the rotating shaft a92 to rotate. The rotating shaft a92 drives the rotating shaft b95 to rotate in the opposite direction through the steering assembly 94. The rotating shaft a92 and the rotating shaft b95 can guide or retract the one-way tube 8 out of the box body 1 through friction.

[0033] like Figure 1 As shown, it also includes a force-bearing rod 2 and an anti-slip sleeve 21 . The force-bearing rod 2 is connected to the upper part of the box body 1 , and the anti-slip sleeve 21 is arranged outside the force-bearing rod 2 . Example 2

[0034] On the basis of Example 1, Figure 5 and Figure 6As shown, it also includes a cleaning frame 10, a positioning spring 101, a connecting plate 102, a slotted cylinder 103 and a ball convex ring 104. The slotted cylinder 103 is axially fixed to the end of the rotating shaft b95. The end of the connecting plate 102 is annular. The annular inner ring is fixed with a ball convex ring 104. The connecting plate 102 is connected to the slotted cylinder 103 through the ball convex ring 104. The slotted cylinder 103 is provided with a closed bending groove around the periphery. The ball convex ring 104 is slidably connected to the groove. A guide column is fixed to the side of the cleaning frame 10. The guide column is slidably connected to the connecting On the plate 102, the positioning spring 101 is sleeved on the guide column, and the end of the positioning spring 101 is connected to the cleaning frame 10 and the connecting plate 102. When the positioning motor 9 is turned on to drive the one-way tube 8 to be guided out or retracted, the rotating shaft b95 will drive the slotted cylinder 103 to rotate, and then drive the connecting plate 102 to slide horizontally, thereby driving the cleaning frame 10 to move back and forth. The cleaning frame 10 is a closed ring, and a brush is arranged inside the cleaning frame 10. The one-way tube 8 passes through the cleaning frame 10, and the brush can clean the surface of the one-way tube 8.

[0035] like Figure 7 and Figure 8 As shown, it also includes a stabilizing rod 11, a support rod 111, a hydraulic cylinder 112, a liquid guide tube 113, a hydraulic box 114, an electromagnetic positioning seat 115 and a magnetic ring 116. The hydraulic cylinder 112 is fixed to the outside of the box body 1. The hydraulic cylinder 112 is symmetrically arranged. The hydraulic cylinder 112 is vertically connected to the side of the box body 1. The hydraulic box 114 is connected to the hydraulic cylinder 112 through the liquid guide tube 113. The telescopic end of the hydraulic cylinder 112 is rotatably connected to the stabilizing rod 11, and the lower end of the hydraulic cylinder 112 is rotatably connected to The support rod 111 is hinged with the stabilizer rod 11 in a T shape, and the telescopic end of the hydraulic box 114 is connected with a magnetic ring 116 connected to the end of the rotating shaft a92 by a key. The outside of the magnetic ring 116 is magnetically connected to the electromagnetic positioning seat 115. A semicircular groove is provided on the outside of the box body 1, and the semicircular groove can limit the rotation of the electromagnetic positioning seat 115. A protrusion is provided at the end of the electromagnetic positioning seat 115, and the telescopic end of the hydraulic box 114 is slidably mounted on the protrusion.

[0036] Two hydraulic boxes 114 are symmetrically arranged, and four hydraulic cylinders 112 are respectively located at the four corners of the box body 1. The hydraulic boxes 114 on each side are connected to the two hydraulic cylinders 112 on the same side. When the positioning motor 9 is turned on to drive the one-way tube 8 to be guided out of the box body 1, the positioning motor 9 causes the electromagnetic positioning seat 115 to generate weak magnetism through the rotating shaft a92. The electromagnetic positioning seat 115 will rotate downward synchronously with the rotating shaft a92, and then drive the telescopic end of the hydraulic box 114 to move downward. At this time, the hydraulic box 114 is in a low pressure state, and the hydraulic cylinder 112 is driven to telescope through the above-mentioned liquid guide tube 113. The end moves downward, thereby the stabilizing rod 11 can be rotated and unfolded, the electromagnetic positioning seat 115 rotates 180 degrees and then stops rotating, the stabilizing rod 11 will be unfolded to the limit position, at this time the stabilizing rod 11 can support the box body 1 to improve its stability, when the one-way tube 8 reaches the extended length, the positioning motor 9 is turned off, the electromagnetic positioning seat 115 will restore the strong magnetism and be fixed to the magnetic ring 116, thereby ensuring that the stabilizing rod 11 does not rotate and maintaining the stability of the box body 1, when the positioning motor 9 is turned on to drive the one-way tube 8 to retract, the above actions are reversed.

[0037] like Fig. 9 As shown, it also includes a telescopic cylinder 12, a telescopic rod 13 and a reset spring 14. The five telescopic cylinders 12 are arranged in a staggered manner and fixed in the lower inner cavity of the box body 1. The telescopic rod 13 is slidably connected in the telescopic cylinder 12. A reset spring 14 is connected between the telescopic rod 13 and the telescopic cylinder 12. The telescopic rod 13 can limit the one-way tube 8 so that the one-way tube 8 is bent, so that a sufficient number of one-way tubes 8 can be placed in the box body 1, thereby improving the space utilization rate of the box body 1.

[0038] like Fig.10 As shown, it also includes a fixed block 15 and a dustproof plate 16. The fixed block 15 is fixedly connected to the side of the box body 1. The fixed block 15 can be connected with the one-way tube 8 to fix the one-way tube 8. The dustproof plate 16 is arranged on the side of the box body 1, specifically outside the open one-way valve 7 of the piston cylinder 3.

[0039] The positioning motor 9 is turned on to drive the rotating shaft a92 to rotate, and the steering assembly 94 can drive the rotating shaft b95 to rotate in the opposite direction, so that the one-way tube 8 can be guided out of the box body 1 through friction, and the rotating shaft b95 will drive the slotted cylinder 103 to rotate, and then drive the connecting plate 102 to slide horizontally, thereby driving the cleaning frame 10 to move back and forth. A brush is arranged inside the cleaning frame 10, and the brush can clean the surface of the one-way tube 8. During the positioning motor 9 is turned on, the electromagnetic positioning seat 115 rotates downward, and the stabilizing bar 11 is rotated and unfolded. After the one-way tube 8 is extended to the required length, the positioning motor 9 is turned off, and then the servo motor is turned on. The machine 5 drives the column disc 4 to rotate, so that it can regularly drive the piston cylinder 3 to introduce external air into the one-way tube 8, so as to achieve the effect of inflation. After the inflation is completed, the servo motor 5 is turned off, and then the positioning motor 9 is controlled to rotate in the opposite direction. The rotating shaft a92 and the rotating shaft b95 will drive the one-way tube 8 to be retracted into the box body 1. During this period, the electromagnetic positioning seat 115 rotates upward to reset, and the stabilizing bar 11 rotates and resets to automatically retract. The telescopic rod 13 in the box body 1 will bend and guide the one-way tube 8 for storage under the action of the reset spring 14. After the one-way tube 8 is retracted, the positioning motor 9 is turned off, and the end of the one-way tube 8 is clamped to the fixed clamping block 15.

[0040] The above description is only an example of the present invention and is not intended to limit the present invention. Any equivalent substitutions made within the principles of the present invention should be included in the protection scope of the present invention. The contents not elaborated in detail in the present invention belong to the existing technologies known to those skilled in the art.

Claims

1. A vehicle-mounted air pump that is easy to use, comprising a housing (1), a piston cylinder (3), a column disc (4), a servo motor (5), a hinged rod (6), a one-way valve (7) and a one-way tube (8), wherein a double-layer inner cavity is provided in the housing (1), the servo motor (5) is fixed in the upper inner cavity, the servo motor (5) is connected to the column disc (4), the column disc (4) is located in the lower inner cavity, the piston cylinder (3) is fixed in the lower inner cavity, one end of the hinged rod (6) is limitedly rotated at the convex column of the column disc (4), and the other end is rotatably connected to the piston rod of the piston cylinder (3), two one-way valves (7) in opposite directions are connected to the side of the piston cylinder (3), one of the one-way valves (7) is in an open state, and the other one-way valve (7) is connected to the one-way tube (8), the one-way tube (8) is coiled around the housing (1) and then led out to the outside, characterized in that: The invention also comprises a positioning motor (9), a worm (91), a rotating shaft a (92), a worm wheel (93), a steering assembly (94) and a rotating shaft b (95). The positioning motor (9) is fixed in the housing (1). The positioning motor (9) is connected to the worm (91). The rotating shaft a (92) and the rotating shaft b (95) are rotatably arranged on the side of the housing (1). The worm wheel (93) is connected to the rotating shaft a (92). The worm (91) and the worm wheel (93) are meshed with each other. The rotating shaft a (92) is connected to the housing (1). The rotating shaft b (95) is driven by the steering assembly (94), the one-way tube (8) is frictionally connected between the rotating shaft a (92) and the rotating shaft b (95), the positioning motor (9) is turned on to drive the worm (91) to rotate, and then drive the rotating shaft a (92) to rotate, the rotating shaft a (92) drives the rotating shaft b (95) to rotate in the opposite direction through the steering assembly (94), and the rotating shaft a (92) and the rotating shaft b (95) can lead the one-way tube (8) out of the box body (1) or retract it through friction.

2. A convenient vehicle-mounted air pump as claimed in claim 1, characterized in that: The steering assembly (94) is composed of a roller, two mutually meshing gears and a pulley set. The roller is parallel to the rotating shaft b (95) and is rotatably connected to the side wall of the box body (1). The two mutually meshing gears are respectively connected to the roller and the rotating shaft b (95) through keys, and the pulley set is connected to the roller and the rotating shaft a (92).

3. A convenient vehicle-mounted air pump as claimed in claim 2, characterized in that: It also includes a force-bearing rod (2) and an anti-slip sleeve (21), wherein the force-bearing rod (2) is connected to the upper part of the box body (1), and the anti-slip sleeve (21) is arranged outside the force-bearing rod (2).

4. A convenient vehicle-mounted air pump as claimed in claim 3, characterized in that: The invention also comprises a cleaning frame (10), a positioning spring (101), a connecting plate (102), a slotted cylinder (103) and a ball convex ring (104). The slotted cylinder (103) is axially fixed to the end of the rotating shaft b (95). The end of the connecting plate (102) is annular. The annular inner ring is fixed with the ball convex ring (104). The connecting plate (102) is connected to the slotted cylinder (103) via the ball convex ring (104). A guide column is fixed to the side of the cleaning frame (10). The guide column is slidably connected to the connecting plate (102). The positioning spring (101) is sleeved on the guide column. The end of the positioning spring (101) is connected to the cleaning frame (10) and the connecting plate (102).

5. A convenient vehicle-mounted air pump as claimed in claim 4, characterized in that: The cleaning frame (10) is in the shape of a closed ring, and the one-way pipe (8) passes through the cleaning frame (10).

6. A convenient vehicle-mounted air pump as claimed in claim 5, characterized in that: A closed curved sliding groove is provided on the periphery of the slotted cylinder (103), and the ball convex ring (104) is slidably connected in the sliding groove.

7. A convenient vehicle-mounted air pump as claimed in claim 6, characterized in that: The invention also comprises a stabilizing rod (11), a support rod (111), a hydraulic cylinder (112), a liquid guiding tube (113), a hydraulic box (114), an electromagnetic positioning seat (115) and a magnetic ring (116); the hydraulic cylinder (112) is fixedly connected to the outside of the box body (1); the hydraulic cylinder (112) is symmetrically arranged; the hydraulic cylinder (112) is vertically connected to the side of the box body (1); the hydraulic box (114) is connected to the hydraulic cylinder (112) via the liquid guiding tube (113); the telescopic end of the hydraulic cylinder (112) is rotatably connected to the stabilizing rod (11); the lower end of the hydraulic cylinder (112) A support rod (111) is rotatably connected, the support rod (111) and the stabilizing rod (11) are hinged in a T-shape, the telescopic end of the hydraulic box (114) is connected, a magnetic ring (116) is connected to the end of the rotating shaft a (92) via a key, the outside of the magnetic ring (116) is magnetically connected to an electromagnetic positioning seat (115), a semicircular groove is provided on the outside of the box body (1), the semicircular groove can limit the rotation of the electromagnetic positioning seat (115), a protrusion is provided at the end of the electromagnetic positioning seat (115), and the telescopic end of the hydraulic box (114) is slidably sleeved on the protrusion.

8. A convenient vehicle-mounted air pump as claimed in claim 7, characterized in that: It also comprises telescopic cylinders (12), telescopic rods (13) and a return spring (14); the telescopic cylinders (12) are arranged in a staggered manner and fixed in the lower inner cavity of the box body (1); the telescopic rods (13) are slidably connected in the telescopic cylinders (12); and a return spring (14) is connected between the telescopic rods (13) and the telescopic cylinders (12).

9. A convenient vehicle-mounted air pump as claimed in claim 8, characterized in that: It also includes a fixed card block (15), wherein the fixed card block (15) is fixedly connected to the side surface of the box body (1).

10. A convenient vehicle-mounted air pump as claimed in claim 9, characterized in that: It also includes a dustproof plate (16), which is arranged on the side of the box body (1).

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