阅读说明：本技术 一种可控气压的自动充气气筒 (Automatic inflating inflator with controllable air pressure ) 是由 张心怡 于 2021-08-05 设计创作，主要内容包括：本发明涉及生活用品技术领域,且公开了一种可控气压的自动充气气筒,包括外壳,所述外壳的内部活动连接有充气机构,充气机构包括电机、锥齿轮一、锥齿轮二、转轴、齿轮一、齿轮二、丝杆、挡块一、活塞、挡块二、出气管、气缸,外壳的内部固定连接有电机,电机的外部固定连接有锥齿轮一,锥齿轮一的外部啮合有锥齿轮二,锥齿轮二的外部固定连接有转轴,转轴的外部固定连接有齿轮一,齿轮一的外部啮合有齿轮二,外壳的外部转动连接有气缸,气缸的外部固定连接有出气管,齿轮二的外部滑动连接有丝杆,丝杆的外部固定连接有挡块一,丝杆的外部固定连接有挡块二,丝杆的外部滑动连接有活塞,既减少了占用面积,也达成了快速充气的目的。(The invention relates to the technical field of living goods and discloses an automatic inflation inflator capable of controlling air pressure, which comprises a shell, wherein an inflation mechanism is movably connected inside the shell, the inflation mechanism comprises a motor, a first bevel gear, a second bevel gear, a rotating shaft, a first gear, a second gear, a screw rod, a first stop block, a piston, a second stop block, an air outlet pipe and an air cylinder, the motor is fixedly connected inside the shell, the first bevel gear is fixedly connected outside the motor, the second bevel gear is meshed outside the first bevel gear, the rotating shaft is fixedly connected outside the second bevel gear, the first gear is fixedly connected outside the rotating shaft, the second gear is meshed outside the first gear, the air cylinder is rotatably connected outside the shell, the air outlet pipe is fixedly connected outside the air cylinder, the screw rod is slidably connected outside the second gear, the first stop block is fixedly connected outside the screw rod, and the second stop block is fixedly connected outside the screw rod, the piston is connected to the outside sliding of lead screw, has both reduced area occupied, has also reached the purpose of quick aerate.)

1. An automatic inflation inflator with controllable air pressure, which comprises a shell (1), and is characterized in that: the inside swing joint of shell (1) has inflating mechanism (2), and the outside swing joint of inflating mechanism (2) has air pressure control mechanism (3).

2. The controlled pressure self-inflating gas cylinder as claimed in claim 1, wherein: the inflation mechanism (2) comprises a motor (201), a first bevel gear (202), a second bevel gear (203), a rotating shaft (204), a first gear (205), a second gear (206), a screw rod (207), a first stopper (208), a piston (209), a second stopper (210), an air outlet pipe (211) and an air cylinder (212), the motor (201) is fixedly connected to the inside of the shell (1), the first bevel gear (202) is fixedly connected to the outside of the motor (201), the second bevel gear (203) is meshed to the outside of the first bevel gear (202), the rotating shaft (204) is fixedly connected to the outside of the second bevel gear (203), the first gear (205) is fixedly connected to the outside of the rotating shaft (204), the second gear (206) is meshed to the outside of the first gear (205), the screw rod (207) is slidably connected to the outside of the second gear (206), the first stopper (208) is fixedly connected to the outside of the screw rod (207), the second stopper (210) is fixedly connected to the outside of the screw rod (207), the outside sliding connection of lead screw (207) has piston (209), and the outside rotation of shell (1) is connected with cylinder (212), and the outside fixedly connected with outlet duct (211) of cylinder (212).

3. The controlled pressure self-inflating gas cylinder as claimed in claim 2, wherein: one end of the rotating shaft (204) is rotatably connected inside the shell (1), the other end of the rotating shaft is fixedly connected to the outer portion (206) of the second gear, a sliding groove is formed in the surface of the second gear (206), the second gear (206) is rotatably connected to the outer portion of the air cylinder (212), one end, close to the second gear (206), of the air cylinder (212) is provided with at least six air delivery holes, the sliding groove is matched with the specification of the air cylinder (212) and corresponds to the position of the air cylinder (212), the position of the piston (209) is provided with the air delivery holes, the radius of the second stopper (210) is smaller than that of the first stopper (208), the air delivery holes correspond to the positions of the first stopper (208) and the second stopper (210) and are matched with the specification, the inner surface of the air cylinder (212) is provided with the first sliding groove, the sliding plug (209) is slidably connected inside the first sliding groove, the surface of the piston (209) is provided with the second sliding groove, and the screw rod (207) is slidably connected inside the second sliding groove, two of the first stop block (208), the piston (209), the second stop block (210), the air outlet pipe (211) and the air cylinder (212) are symmetrically distributed on two sides of the second gear (206).

4. The controlled pressure self-inflating gas cylinder as claimed in claim 1, wherein: the outer fixedly connected with power (4) of shell (1), the outer fixedly connected with of shell (1) is held hand (5), the outer fixedly connected with atmospheric pressure pilot lamp (6) of shell (1), the outer fixedly connected with switch (7) of shell (1).

5. The controlled pressure self-inflating gas cylinder as claimed in claim 1, wherein: the pneumatic control mechanism (3) comprises a sliding rod (31), a spring (32), a first metal block (33), a second metal block (34), a shell (35), a sliding block (36), an expansion rod (37), a rack (38) and a long rod (39), wherein the sliding rod (31) is connected with the cylinder (212) in a sliding mode, the spring (32) is fixedly connected with the sliding rod (31) outside, the first metal block (33) is fixedly connected with the sliding rod (31), the sliding block (36) is connected with the shell (35) in a sliding mode, the expansion rod (37) is fixedly connected with the sliding block (36) outside, the long rod (39) is fixedly connected with the sliding block (36), the second metal block (34) is fixedly connected with the long rod (39), and the rack (38) is fixedly connected with the shell (1).

6. The controlled pressure self-inflating gas cylinder as claimed in claim 5, wherein: the telescopic link (37) comprises a loop bar, an inner bar and a small spring, the loop bar is fixedly connected to the outside of the sliding block (36), one end of the small spring is fixedly connected to the inner surface of the loop bar, the other end of the small spring is fixedly connected to one end of the inner bar, the inner bar is matched with the specification of the rack (38), the first metal block (33) and the second metal block (34) are corresponding in position and matched with the specification, a sliding groove is formed in the shell (1), and the long bar (39) is connected in a sliding mode to pound the inside of the sliding groove.

7. The controlled pressure self-inflating gas cylinder as claimed in claim 5 or 2, wherein: one end of the spring (32) is fixedly connected to the surface of the sliding rod (31), the other end of the spring is fixedly connected to the outside of the air cylinder (212), the first metal block (33) is fixedly connected to one end, far away from the spring (32), of the sliding rod (31), and an air vent is formed in the air cylinder (212).

Technical Field

The invention relates to the technical field of articles for daily use, in particular to an automatic inflation inflator with controllable air pressure.

Background

At present, with the progress of society, it is basically realized that families have a car, the car is very convenient to go out, the car runs for a long time, the situation of tire air deficiency can be avoided, air cylinders are common, almost families have the car, but the inflation of a traditional air cylinder is troublesome, on one hand, people need to press the air cylinders with effort to inflate the air cylinders, on the other hand, people need to press the tires with effort to determine whether the tires are full of tire air, and time, labor and trouble are wasted.

Therefore, there is a need for a controlled pressure self-inflating air cylinder to address this problem.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides an automatic inflation inflator with controllable air pressure, which has the advantages of quick inflation and controllable air pressure, and solves the problems that the inflation of the traditional inflator is troublesome, on one hand, a person is required to press a tire with strength to determine whether the tire is full of air, and on the other hand, the person is required to press with strength, which wastes time, labor and trouble.

(II) technical scheme

In order to realize the purposes of quick inflation and controllable air pressure, the invention provides the following technical scheme: an automatic inflation inflator with controllable air pressure comprises a shell, wherein an inflation mechanism is movably connected inside the shell, and an air pressure control mechanism is movably connected outside the inflation mechanism.

Preferably, the inflation mechanism comprises a motor, a first bevel gear, a second bevel gear, a rotating shaft, a first gear, a second gear, a screw rod, a first check block, a piston, a second check block, an air outlet pipe and a cylinder, the motor is fixedly connected with the inside of the shell, the first bevel gear is fixedly connected with the outside of the motor, the second bevel gear is meshed with the outside of the first bevel gear, the rotating shaft is fixedly connected with the outside of the second bevel gear, the first gear is fixedly connected with the outside of the rotating shaft, the second gear is meshed with the outside of the first gear, the screw rod is slidably connected with the outside of the second gear, the first check block is fixedly connected with the outside of the screw rod, the second check block is fixedly connected with the outside of the screw rod, the piston is slidably connected with the outside of the shell in a rotating mode, and the air outlet pipe is fixedly connected with the outside of the cylinder.

Preferably, one end of the rotating shaft is rotatably connected inside the shell, the other end of the rotating shaft is fixedly connected outside the second gear, a sliding groove is formed in the surface of the second gear, the second gear is rotatably connected outside the cylinder, one end, close to the second gear, of the cylinder is provided with at least six gas transmission holes, the sliding groove is matched with the specification of the cylinder and corresponds to the position of the second gear, a gas transmission hole is formed in the piston, the radius of the second gear is smaller than that of the first gear, the gas transmission hole corresponds to the positions of the first gear and the second gear, the specification of the first gear is matched, the inner surface of the cylinder is provided with a first sliding groove, the sliding plug is slidably connected inside the first sliding groove, the sliding rod is slidably connected inside the second sliding groove, the first sliding groove and the second sliding groove enable the first screw rod and the sliding plug to only slide up and down and cannot rotate, and the first gear, the piston, the second gear, the gas outlet pipe and the cylinder are provided with two gears, and the two gears are symmetrically distributed on two sides of the second gear.

Preferably, the outside fixedly connected with power of shell, the outside fixedly connected with of shell is shaken hands, the outside fixedly connected with atmospheric pressure pilot lamp of shell, the outside fixedly connected with switch of shell.

Preferably, the air pressure control mechanism comprises a slide bar, a spring, a first metal block, a second metal block, a shell, a sliding block, a telescopic rod, a rack and a long rod, the outside of the cylinder is connected with the slide bar in a sliding manner, the outside of the slide bar is fixedly connected with the spring, the outside of the slide bar is fixedly connected with the first metal block, the outside of the shell is connected with the sliding block in a sliding manner, the outside of the sliding block is fixedly connected with the telescopic rod, the outside of the sliding block is fixedly connected with the long rod, the outside of the long rod is fixedly connected with the second metal block, and the outside of the shell is fixedly connected with the rack.

Preferably, the telescopic link includes loop bar, interior pole and a little spring, and loop bar fixed connection is in the outside of slider, and little spring one end fixed connection is in the internal surface of loop bar, and other end fixed connection is in the outside of interior pole, and interior pole and the specification phase-match of rack, the corresponding and specification phase-match in position of metal block one and metal block two, and the spout has been seted up to the inside of shell, and stock sliding connection pounces the inside of spout.

Preferably, one end of the spring is fixedly connected to the surface of the sliding rod, the other end of the spring is fixedly connected to the outside of the cylinder, the first metal block is fixedly connected to one end, away from the spring, of the sliding rod, a vent hole is formed in the cylinder, and the vent hole enables gas in the cylinder to be communicated with gas in a space where one end, away from the first metal block, of the sliding rod.

Preferably, the first metal block, the air pressure indicating lamp and the power supply are connected, the second metal block is electrically connected with the power supply and the air pressure indicating lamp, when the first metal block is in contact with the second metal block, a circuit is changed from an open circuit to a closed circuit, the power supply is switched on and the air pressure indicating lamp is electrified, and the motor is electrically connected with the power supply and the switch.

(III) advantageous effects

Compared with the prior art, the invention provides an automatic inflation inflator with controllable air pressure, which has the following beneficial effects:

1. this controllable atmospheric pressure's automatic inflation inflator, through the starter motor, the motor drives bevel gear and rotates, bevel gear rotates and drives bevel gear two and rotate, bevel gear two rotates and drives the pivot and rotate, the pivot rotates and drives gear one and rotates, gear one rotates and drives gear two and rotates, gear two rotates and drives the lead screw and reciprocate, thereby the air in the compression cylinder, through the outlet duct with air input tire after the air compression, owing to adopt the design of two cylinders, two cylinders work in turn, so make whole inflator inner space obtain make full use of, one has reduced area occupied, two have reached quick inflatable purpose.

2. This automatic inflation inflator of controllable atmospheric pressure, through the same airtight space atmospheric pressure equal principle everywhere in the cylinder, when inflating, inside atmospheric pressure can increase, inside gas extrusion slide bar, slide bar compression spring, the slide bar drives metal block one and moves right, when atmospheric pressure reduces, under about the spring restoring force, the spring extrudees the slide bar, the slide bar moves left, air pressure is big, the distance that the slide bar moved right is big, when atmospheric pressure reaches a definite value, metal block one and metal block two phase contact, the circuit becomes the route by the circuit break this moment, the power gives the circular telegram of atmospheric pressure pilot lamp, inform the user and aerify the completion, thereby the controllable purpose of atmospheric pressure has been reached.

Drawings

FIG. 1 is a sectional view of a portion of the present invention;

FIG. 2 is a schematic view of the connection structure of the inflating mechanism of the present invention;

FIG. 3 is a schematic view of the connection structure of the pneumatic control mechanism according to the present invention;

fig. 4 is an enlarged view of a structure in fig. 3.

In the figure: 1. a housing; 2. an inflation mechanism; 201. a motor; 202. a first bevel gear; 203. a second bevel gear; 204. a rotating shaft; 205. a first gear; 206. a second gear; 207. a screw rod; 208. a first stop block; 209. a piston; 210. a second stop block; 211. an air outlet pipe; 212. a cylinder; 3. an air pressure control mechanism; 31. a slide bar; 32. a spring; 33. a first metal block; 34. a second metal block; 35. a housing; 36. a slider; 37. a telescopic rod; 38. a rack; 39. a long rod; 4. a power source; 5. and (4) handshaking.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The first embodiment is as follows:

referring to fig. 1-2, an automatic inflation inflator with controllable air pressure comprises a housing 1, an inflation mechanism 2 is movably connected inside the housing 1, the inflation mechanism 2 comprises a motor 201, a first bevel gear 202, a second bevel gear 203, a rotating shaft 204, a first gear 205, a second gear 206, a screw 207, a first stopper 208, a piston 209, a second stopper 210, an air outlet pipe 211 and an air cylinder 212, the motor 201 is fixedly connected inside the housing 1, the first bevel gear 202 is fixedly connected outside the motor 201, the second bevel gear 203 is engaged outside the first bevel gear 202, the rotating shaft 204 is fixedly connected outside the second bevel gear 203, the first gear 205 is fixedly connected outside the rotating shaft 204, the second gear 206 is engaged outside the first gear 205, the air cylinder 212 is rotatably connected outside the housing 1, one end of the rotating shaft 204 is rotatably connected inside the housing 1, the other end of the rotating shaft is fixedly connected outside the second gear, a chute is formed in the surface of the second gear 206, the outer part of the second gear 206 is slidably connected with a screw rod 207, the outer part of the screw rod 207 is fixedly connected with a first stop block 208, the outer part of the screw rod 207 is fixedly connected with a second stop block 210, the inner part of the piston 209 is provided with a gas transmission hole, the radius of the second stop block 210 is smaller than that of the first stop block 208, the gas transmission hole corresponds to the positions of the first stop block 208 and the second stop block 210 and is matched with the specification, the second gear 206 is rotatably connected with the outer part of the cylinder 212, one end, close to the second gear 206, of the cylinder 212 is provided with at least six gas transmission holes, the chute is matched with the specification of the cylinder 212 and corresponds to the position, the inner surface of the cylinder 212 is provided with a first chute, the sliding plug 209 is slidably connected with the inner part of the first chute, the surface of the piston 209 is provided with a second chute, the screw rod 207 is slidably connected with the inner part of the second chute, the first chute and the chute enable the screw rod and the sliding plug to only slide up and down and cannot rotate, the outer part of the cylinder 212 is fixedly connected with a gas outlet pipe 211, the outside sliding connection of lead screw 207 has piston 209, dog one 208, piston 209, dog two 210, outlet duct 211, cylinder 212, all there are two, the symmetric distribution is in the both sides of gear two 206, the outside swing joint of mechanism 2 of aerifing has atmospheric pressure control mechanism 3, the outside fixedly connected with power 4 of shell 1, the outside fixedly connected with of shell 1 holds hand 5, the outside fixedly connected with of shell 1 warns atmospheric pressure pilot lamp 6 up to standard, the outside fixedly connected with control power switch 7 of circular telegram of shell 1.

Example two:

referring to fig. 1-3, an automatic inflation gas cylinder with controllable gas pressure comprises a housing 1, an inflation mechanism 2 movably connected to the inside of the housing 1, a gas pressure control mechanism 3 movably connected to the outside of the inflation mechanism 2, the gas pressure control mechanism 3 including a sliding rod 31, a spring 32, a first metal block 33, a second metal block 34, a housing 35, a sliding block 36, an expansion link 37, a rack 38, and a long rod 39, the sliding rod 31 slidably connected to the outside of a cylinder 212, the spring 32 fixedly connected to the outside of the sliding rod 31, the first metal block 33 fixedly connected to the outside of the sliding rod 31, one end of the spring 32 fixedly connected to the surface of the sliding rod 31, the other end fixedly connected to the outside of the cylinder 212, the first metal block 33 fixedly connected to one end of the sliding rod 31 far away from the spring 32, a vent hole provided in the cylinder 212 for communicating the gas in the cylinder 212 with the gas in the space at the end of the sliding rod 31 far away from the first metal block 33, the outer part of the shell 35 is connected with a sliding block 36 in a sliding way, the outer part of the sliding block 36 is fixedly connected with an expansion link 37, the expansion link 37 comprises a loop bar, an inner rod and a small spring, the loop bar is fixedly connected to the outer part of the sliding block 36, one end of the small spring is fixedly connected to the inner surface of the loop bar, the other end of the small spring is fixedly connected to one end of the inner rod, the inner rod is matched with the specification of the rack 38, the outer part of the sliding block 36 is fixedly connected with a long rod 39, the outer part of the long rod 39 is fixedly connected with a second metal block 34, a first metal block 33, the motor 201 is connected with the control center and the power supply 4, the second metal block 34 is connected with the power supply 4, when the first metal block 33 is contacted with the second metal block 34, a circuit is changed from an open circuit to a closed circuit, at the moment, the control center can control the power supply 4 can not supply the current to the motor 201 any more, the first metal block 33 is corresponding to the specification of the second metal block 34, a sliding groove is formed in the inner part of the shell 1, the inside of spout is pounded to stock 39 sliding connection, the outside fixedly connected with rack 38 of shell 1, the outside fixedly connected with power 4 of shell 1, the outside fixedly connected with of shell 1 holds the hand 5, the outside fixedly connected with warning atmospheric pressure pilot lamp 6 up to standard of shell 1, the outside fixedly connected with of shell 1 control power switch 7 that circular telegram.

Example three:

referring to fig. 1-4, an automatic inflation inflator with controllable air pressure comprises a housing 1, an inflation mechanism 2 is movably connected inside the housing 1, the inflation mechanism 2 comprises a motor 201, a first bevel gear 202, a second bevel gear 203, a rotating shaft 204, a first gear 205, a second gear 206, a screw 207, a first stopper 208, a piston 209, a second stopper 210, an air outlet pipe 211 and an air cylinder 212, the motor 201 is fixedly connected inside the housing 1, the first bevel gear 202 is fixedly connected outside the motor 201, the second bevel gear 203 is engaged outside the first bevel gear 202, the rotating shaft 204 is fixedly connected outside the second bevel gear 203, the first gear 205 is fixedly connected outside the rotating shaft 204, the second gear 206 is engaged outside the first gear 205, the air cylinder 212 is rotatably connected outside the housing 1, one end of the rotating shaft 204 is rotatably connected inside the housing 1, the other end is fixedly connected outside the second gear, a sliding groove is formed in the surface of the second gear 206, the outer part of the second gear 206 is slidably connected with a screw rod 207, the outer part of the screw rod 207 is fixedly connected with a first stop block 208, the outer part of the screw rod 207 is fixedly connected with a second stop block 210, the inner part of the piston 209 is provided with a gas transmission hole, the radius of the second stop block 210 is smaller than that of the first stop block 208, the gas transmission hole corresponds to the positions of the first stop block 208 and the second stop block 210 and is matched with the specification, the second gear 206 is rotatably connected with the outer part of the cylinder 212, one end, close to the second gear 206, of the cylinder 212 is provided with at least six gas transmission holes, the chute is matched with the specification of the cylinder 212 and corresponds to the position, the inner surface of the cylinder 212 is provided with a first chute, the sliding plug 209 is slidably connected with the inner part of the first chute, the surface of the piston 209 is provided with a second chute, the screw rod 207 is slidably connected with the inner part of the second chute, the first chute and the chute enable the screw rod and the sliding plug to only slide up and down and cannot rotate, the outer part of the cylinder 212 is fixedly connected with a gas outlet pipe 211, the piston 209, the first stop block 208, the piston 209, the second stop block 210, the air outlet pipe 211 and the air cylinder 212 are connected to the outer portion of the screw rod 207 in a sliding mode, and the two air outlet pipes are symmetrically distributed on two sides of the second gear 206.

The outside of the inflating mechanism 2 is movably connected with an air pressure control mechanism 3, the air pressure control mechanism 3 comprises a sliding rod 31, a spring 32, a first metal block 33, a second metal block 34, a shell 35, a sliding block 36, an expansion rod 37, a rack 38 and a long rod 39, the outside of the air cylinder 212 is slidably connected with the sliding rod 31, the outside of the sliding rod 31 is fixedly connected with the spring 32, the outside of the sliding rod 31 is fixedly connected with the first metal block 33, one end of the spring 32 is fixedly connected to the surface of the sliding rod 31, the other end of the spring is fixedly connected to the outside of the air cylinder 212, the first metal block 33 is fixedly connected to one end, far away from the spring 32, of the sliding rod 31, an air vent is arranged inside the air cylinder 212, the air inside of the air cylinder 212 is communicated with the air in the space where one end, far away from the first metal block 33, of the sliding rod 31 is located, the sliding block 36 is slidably connected to the outside of the shell 35, the expansion rod 37 is fixedly connected with the outside of the sliding block 36, and the expansion rod 37 comprises a loop bar, The inner rod and a small spring, the loop bar is fixedly connected to the outside of the sliding block 36, one end of the small spring is fixedly connected to the inner surface of the loop bar, the other end of the small spring is fixedly connected to the outside of the inner rod, the long rod 39 is fixedly connected to the outside of the sliding block 36, the second metal block 34 is fixedly connected to the outside of the long rod 39, the first metal block 33, the motor 201 is connected to the control center and the power supply 4, the second metal block 34 is connected to the power supply 4, when the first metal block 33 is in contact with the second metal block 34, the circuit is changed from open circuit to closed circuit, the control center can control the power supply 4 not to supply current to the motor 201, the first metal block 33 corresponds to the second metal block 34 in position and is matched in specification, the inside of the shell 1 is provided with a chute, the long rod 39 is in sliding connection with the chute, the outside of the shell 1 is movably connected with the rack 38, the outside of the shell 1 is fixedly connected with the power supply 4, the outside of the shell 1 is fixedly connected with the handle 5, the outside fixedly connected with warning atmospheric pressure of shell 1 is up to standard atmospheric pressure pilot lamp 6, and the outside fixedly connected with switch 7 of control power switching on of shell 1.

The working principle is that when a user uses the inflator, firstly, the sliding block 36 is shifted, the sliding block 36 can drive the long rod 39 to move, the long rod 39 can drive the second metal block 34 to move, so that the air pressure value of gas to be filled is determined, after the required air pressure value is determined, the user presses the switch 7 to switch on the power supply 4, the power supply 4 can supply power to the motor, the motor 201 is started, the motor 201 can drive the first bevel gear 202 to rotate, the first bevel gear 202 rotates to drive the second bevel gear 203 to rotate, the second bevel gear 203 rotates to drive the rotating shaft 204 to rotate, the rotating shaft 204 rotates to drive the first gear 205 to rotate, the first gear 205 rotates to drive the second gear 206 to rotate, the second gear 206 rotates to drive the screw rod 207 to slide up and down, so as to compress air in the air cylinder 212, the air is input into the tire through the air outlet pipe 211 after being compressed, when the air is pumped, the air pressure in the air cylinder 212 can be increased, and the internal air can extrude the sliding rod 31, the sliding rod 31 compresses the spring 32 and then moves rightwards, the sliding rod 31 moves rightwards to drive the first metal block 33 to move rightwards, when air pressure is reduced, the sliding rod 31 moves leftwards under the restoring force of the spring 32, the larger the air pressure in the air cylinder 212 is, the larger the distance of the sliding rod 31 moving rightwards is, when the air pressure reaches a certain value, the first metal block 33 is in contact with the second metal block 34, the circuit is switched into a circuit through an open circuit, at the moment, the power supply 4 energizes the air pressure indicator lamp 6, the air pressure indicator lamp 6 emits light to inform a user that the air pressure reaches the standard, the user can press the switch 7 to cut off current supply, and the inflation process is stopped.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.