CN110701019A - Card tenon pump - Google Patents

Abstract

The invention discloses a tenon type inflator, which comprises a holding seat, an inflating pipe group, a joint component and an air pressure gauge, wherein the holding seat is provided with a hollow shell, the inflating pipe group is arranged at an air inlet end of the shell, the joint component is arranged at an air outlet of the shell, and the air pressure gauge is arranged in a measuring part of the holding seat. The casing of the holding seat and a connecting piece of the inflating tube set are mutually clamped and positioned by at least one clamping block and at least one clamping groove, and at least one positioning block penetrates through the casing and the connecting piece, so that the relative position of the connecting piece and the holding seat is locked.

Description

Card tenon pump

technical field

The present invention relates to an air pump, in particular to a card tenon type air pump which is manually driven for inflation and has a stable structure.

Background technique

A pump is a common tool in ordinary life, which can be used to pressurize gas, and use the pressurized gas to inflate products that need to be inflated, such as various balls or bicycle tires.

Referring to FIGS. 12 to 14 , the prior art pump includes a holding seat 61 , a pumping tube group 62 , an air pressure gauge 64 , a piston tube 65 and an inflation joint 66 . An inner flow channel 611 is formed through the inside of the holding base 61 , so that two ends of the inner flow channel 611 are a first end and a second end respectively. One end of the inflating tube set 62 is combined with the holding base 61 through the external thread 621 and the internal thread 612 , and the inflating tube set 62 communicates with the first end of the inner channel 611 correspondingly. The air pressure gauge 64 is embedded on the holding base 61 and communicates with the inner flow channel 611 through a through hole 613 on the holding base 61 . The piston tube 65 extends into the inner flow channel 611 from the second end of the inner channel 611 of the holding seat 61 , so that the piston tube 65 has an inner end located inside the holding seat 61 and an inner end located in the inner channel 611 . An outer end of the holding seat 61, the inner end of the piston tube 65 is provided with a piston 651, the piston 651 can move back and forth in the inner flow channel 611, and the inner end of the piston tube 65 and its The upper piston 651 can further extend into the pump tube group 62 . The inflation joint 66 is assembled with the outer end of the piston tube 65 .

The problem with the inflator of the prior art is that, first of all, since the holding seat 61 and the inflator tube set 62 are combined with the inner thread 612 and the outer thread 621, in addition to various collisions and vibrations during transportation, In addition to the loosening of the joint, which causes the holding base 61 and the air pump set 62 to be separated from each other, when the pump is placed in a store for sale, the holding base 61 and the air pump set 62 are also easily damaged due to The customers are free to rotate and loosen and separate from each other, and even cause one or more components of the pump to be lost.

Furthermore, as shown in FIG. 14 , since the air pressure gauge 64 communicates with the inner flow channel 611 through the through hole 613 of the holding seat 61 , when the piston 651 of the piston tube 65 moves to the inner flow When the first end of the channel 611 is between the through hole 613 of the holding base 61, the air pressure gauge 64 and the inflating tube set 62 are blocked by the piston 651, so that the air pressure gauge 64 cannot measure the air inflating tube set 62, only when the piston 651 of the piston tube 65 is moved between the through hole 613 of the holding seat 61 and the second end of the inner flow channel 611, the air pressure gauge 64 can pass through the holding seat The through hole 613 of the 61 communicates with the inner flow channel 611 of the inflating tube set 62, so as to measure the inflation pressure generated by the inflating tube set 62, which will cause inconvenience in use.

As mentioned above, there is still room for further improvement in the pump of the prior art.

SUMMARY OF THE INVENTION

In view of the aforementioned problems in the prior art, the object of the present invention is to provide a tenon-type inflator, which has a stable structure, is not easily disassembled, and can keep the air pressure gauge and the inflator set in communication, so as to continuously detect the inflator. Inflation pressure generated by the trachea group.

In order to achieve the above-mentioned purpose of the invention, the technical means adopted in the present invention is to make a tenon type air pump comprising:

A holding base has a hollow shell, at least one snap block and at least one outer fixing hole, two ends of the shell respectively form an air inlet and an exhaust port, the at least one snap block protrudes The at least one outer fixing hole is formed on the casing and is located close to the intake end of the casing;

An air pump set, which is assembled on the housing of the holding base with one end of the air inlet end, the air pump set includes an outer tube, a set of connectors, an inner tube, a valve plate and a piston rod , the outer tube has a front end and a rear end, the front end of the outer tube faces the holding seat, the end face of the front end of the outer tube is formed with at least one air inlet hole and is provided with a one-way valve, the one-way valve So that the gas can only flow into the inside of the outer pipe from the outside of the outer pipe through the air inlet, the assembly is a tubular block, which is fixed at the front end of the outer pipe and connected with the inside of the outer pipe The assembly has a front end, a rear end, at least one snap groove and at least one inner fixing hole, the rear end of the assembly is fixedly connected with the outer tube, and the at least one snap groove is concavely formed. On an outer wall surface of the assembly element, each snap groove is L-shaped and has an axial extension section and a lateral extension section, the axial extension section extends along the axial direction of the assembly element and penetrates through the assembly The front end of the connecting piece, the lateral extending section is perpendicular to the axially extending section and communicates with the axially extending section, the at least one inner fixing hole is formed through the connecting piece, and the inner tube is penetrated through the In the outer tube, a flow channel is formed inside the inner tube, the end of the inner tube facing the assembly is a fixed end, the fixed end of the inner tube is fixed in combination with the front end of the outer tube, and the valve plate is non- The circular shape is arranged at the fixed end of the inner tube and can selectively close the flow channel of the inner tube. The piston rod passes through the rear end of the outer tube. The piston rod has a hollow rod body, a piston and a handle, the rod body penetrates the rear end of the outer tube and has an inner end and an outer end, the inner tube extends into the rod body from the inner end of the rod body, and the piston is arranged inside the rod body The end part is abutted against an inner wall surface of the outer tube, and the handle is fixed on the outer end part of the rod body;

a joint assembly, which is installed at the exhaust port of the housing of the holder;

When assembling the holding base and the air pump assembly, the assembling member is inserted into the casing from the air inlet end of the casing, and the at least one snap block on the inner wall of the casing is first along the at least one The axial extension of a snap groove moves, and then drives the outer tube and the assembly to rotate relative to the holding base, so that the snap block extends along the lateral extension of the snap groove;

When the buckling block is positioned on the lateral extension of the buckling groove, the at least one inner fixing hole of the assembly corresponds to the at least one outer fixing hole of the holding base respectively, and each set of positions corresponds to A positioning block is arranged in the corresponding inner fixing hole and the outer fixing hole.

In the above card tenon pump:

The holding base can have an outer dividing pipe, an inner dividing pipe and a measuring part, the outer dividing pipe is arranged in the casing, and opposite ends of the outer dividing pipe face the air inlet end of the casing and the measuring part respectively. The exhaust port, the end of the outer partition pipe facing the exhaust port is in close contact with the shell, the inner partition pipe is arranged in the outer partition pipe, and the opposite ends of the inner partition pipe face the inlet of the shell respectively. The gas end and the exhaust port, the end of the inner partition pipe facing the exhaust port is in close contact with the shell, an inner flow channel is formed in the inner partition pipe, and the inner flow channel directly communicates with the exhaust port of the shell. An air port, an outer flow channel is formed between the outer dividing pipe and the inner dividing pipe, the outer flow channel only communicates with the inner flow channel of the housing, and the outer flow channel communicates with the exhaust port of the housing through the inner flow channel. The measuring portion is formed on the casing and has a concave accommodating groove, and the accommodating groove communicates with the outer flow channel through a first through hole;

The joint assembly can include a piston tube, a piston and a charging joint, the piston tube movably extending from the exhaust port into the inner dividing tube, the piston being provided at an inner end of the piston tube and being accessible at The inner dividing pipe moves back and forth, and the gas-filled joint is assembled with an outer end of the piston pipe;

The tenon-type air pump can further have an air pressure gauge installed in the accommodating groove of the measuring part of the holding base.

In the above card tenon pump:

The holding seat can have a pressure relief portion, the pressure relief portion is formed on the casing and has a side channel, and the side channel communicates with the outer flow channel through a second through hole;

The tenon-type air pump can further have a pressure relief group, and the pressure relief group is arranged in the side channel of the pressure relief portion of the holding seat.

In the above card tenon pump:

The holding base can have an outer dividing pipe and a measuring part, the outer dividing pipe is arranged in the casing, and opposite ends of the outer dividing pipe face the air inlet end and the exhaust port of the casing, respectively. One end of the outer dividing pipe facing the exhaust port is in close contact with the casing, the measuring portion is formed on the casing and has a concave accommodating groove, and the accommodating groove is communicated through a first through hole the outer divider;

The joint assembly can include an inflatable joint fixed at the exhaust port of the housing of the holder;

The tenon-type air pump can further have an air pressure gauge installed in the accommodating groove of the measuring part of the holding base.

In the above card tenon pump:

The holding seat can have a pressure relief portion, the pressure relief portion is formed on the casing and has a side channel, and the side channel communicates with the outer partition pipe through a second through hole;

The tenon-type air pump can further have a pressure relief group, and the pressure relief group is arranged in the side channel of the pressure relief portion of the holding seat.

In the above-mentioned tenon-type air pump, the specific number of the at least one buckle block of the holding base can include two buckle blocks, and the specific number of the at least one buckle groove of the assembly can be composed of two Snap slot.

In the above-mentioned tenon-type air pump, the specific number of the at least one outer fixing hole of the holding seat can include two outer fixing holes, and the specific number of the at least one inner fixing hole of the assembly element can include two Internal fixing hole.

In the above-mentioned tenon-type air pump, each of the locking blocks of the holding base and the outer fixing holes corresponding to one of the positions can be arranged at intervals along the axial direction of the casing.

In the above-mentioned tenon type air pump, the two locking blocks of the holding seat can be located at two opposite positions in the radial direction of the housing.

Through the above-mentioned design, when the snap block of the holding base is snapped and positioned in the snap groove of the assembly member of the air pump set, the outer tube and the assembly member cannot be axially removed from the grip. The holder is pulled out, and then a positioning block is inserted into the outer fixing hole and the inner fixing hole corresponding to each group of positions of the holder and the assembly, which can further lock the connection between the assembly and the holder. The relative position prevents the assembly and the outer tube from rotating relative to the holding seat, so that the tenon-type pump of the present invention will not be disassembled arbitrarily due to shaking or collision, and will not be disassembled when it is sold in the store. Customers can easily disassemble, thus maintaining the integrity of the card tenon pump.

Furthermore, through the design of dividing the inside of the housing of the holder to form the inner flow channel and the outer flow channel by the outer dividing tube and the inner dividing tube, it can be ensured that the first through hole of the measuring portion of the holder is kept in communication. The outer flow channel of the housing enables the air pressure gauge provided in the measuring part to continuously measure the inflation pressure generated by the inflating tube group, without being affected by the position of the piston of the joint assembly.

Description of drawings

FIG. 1 is a perspective external view of the present invention.

Figure 2 is a side cross-sectional view of the present invention with the piston of the pump set pushed forward.

Figure 3 is a side sectional view of the present invention with the piston of the pump set pulled back.

FIG. 4 is a perspective exploded enlarged view of the outer tube and the assembly component of the holding base and the inflating tube set of the present invention.

FIG. 5 is an enlarged three-dimensional cross-sectional view of the inner tube and the piston rod of the holding seat and the gas pumping tube set of the present invention.

FIG. 6 is an enlarged three-dimensional cross-sectional view of the inner tube of the air pumping tube set of the present invention, wherein the valve plate of the air pumping tube set is opened relative to the inner tube.

FIG. 7 is an enlarged three-dimensional cross-sectional view of the inner tube of the air pumping tube set of the present invention, wherein the valve plate of the air pumping tube set closes the inner tube.

8 to 10 are side action views of the present invention for assembling the holding base and the assembly component of the inflating tube set.

FIG. 11 is an enlarged side sectional view of another preferred embodiment of the present invention.

Figure 12 is a side view of the prior art.

FIG. 13 is an enlarged schematic partial cross-sectional view of a side view of the prior art, wherein the piston tube is in a stored state.

FIG. 14 is an enlarged schematic partial cross-sectional view of the prior art, wherein the piston tube is in an outwardly stretched state.

Detailed ways

Referring to FIG. 1 , the tenon type air pump of the present invention includes a holding base 10 , a pumping tube group 20 , a joint assembly 30 , a pressure gauge 40 and a pressure relief group 50 .

2 and 4, the holding base 10 has a hollow shell 11, an outer partition tube 12, an inner partition tube 13, at least one snap block 14, at least one outer fixing hole 15, a Measuring part 16 and a pressure relief part 17 .

As shown in FIG. 2 , two ends of the casing 11 respectively form an intake end 111 and an exhaust port 112 . The outer dividing pipe 12 is disposed in the casing 11 , opposite ends of the outer dividing pipe 12 face the intake end 111 and the exhaust port 112 respectively, and one end of the outer dividing pipe 12 which faces the exhaust port 112 and The casings 11 are in close contact with each other. The inner dividing pipe 13 is disposed in the outer dividing pipe 12 , opposite ends of the inner dividing pipe 13 face the intake end 111 and the exhaust port 112 respectively, and one end of the inner dividing pipe 13 faces the exhaust port 112 It is in close contact with the casing 11 .

The above-mentioned outer dividing pipe 12 and inner dividing pipe 13 divide the interior of the casing 11 into an inner flow channel 113 and an outer flow channel 114 . The inner flow channel 113 is formed in the inner partition pipe 13 and directly communicates with the exhaust port 112 of the housing 11 . The outer flow channel 114 is formed between the outer separation pipe 12 and the inner separation tube 13 , wherein, because the end of the inner separation tube 13 facing the exhaust port 112 is in close contact with the housing 11 , the outer flow channel 114 Only the inner flow channel 113 of the housing 11 is communicated, and the outer flow channel 114 needs to pass through the inner flow channel 113 to communicate with the exhaust port 112 of the housing 11 .

As shown in FIG. 4 , the at least one locking block 14 is formed protruding from an inner wall surface of the casing 11 and is located near the intake end 111 of the casing 11 . The at least one outer fixing hole 15 is formed through the casing 11 and is also located near the intake end 111 of the casing 11 .

As shown in FIG. 2 , the measuring portion 16 is formed on the housing 11 and has a concave accommodating groove 161 , and the accommodating groove 161 communicates with the outer flow channel 114 through a first through hole 162 . The pressure relief portion 17 is formed on the housing 11 and has a side channel 171 , and the side channel 171 communicates with the outer flow channel 114 through a second through hole 172 .

Referring to FIG. 2 and FIG. 3 , the air-inflating tube set 20 is assembled on the housing 11 of the holding base 10 at the end provided with the air inlet end 111 , and the air-inflating tube set 20 includes an outer tube 21 , a set of Connector 23 , an inner tube 24 , a valve plate 25 and a piston rod 26 .

The outer tube 21 has a front end and a rear end. The front end of the outer tube 21 faces the holding seat 10 . At least one air inlet hole 211 and a one-way valve 22 are formed through the end surface of the front end of the outer tube 21 . , the one-way valve 22 allows gas to flow into the interior of the outer pipe 21 only from the outside of the outer pipe 21 through the inlet hole 211 , and the gas inside the outer pipe 21 cannot flow out of the outer pipe 21 through the inlet hole 211 Outer tube 21 .

Referring to FIG. 4 , the assembly member 23 is a tubular block, which is fixed at the front end of the outer tube 21 and communicated with the interior of the outer tube 21 . The assembly member 23 has a front end and a rear end. end, at least one snap groove 231 and at least one inner fixing hole 232 . The rear end of the assembly 23 is fixedly connected with the outer tube 21 . The at least one snap groove 231 is concavely formed on an outer wall surface of the assembly member 23 , and each snap groove 231 is L-shaped and has an axially extending section 2311 and a laterally extending section 2312 . The segment 2311 extends along the axial direction of the assembling member 23 and penetrates the front end of the assembling member 23 , and the laterally extending portion 2312 is perpendicular to the axially extending portion 2311 and communicates with the axially extending portion 2311 . The at least one inner fixing hole 232 is formed through the assembly element 23 .

In the specific embodiment of the present invention, the outer tube 21 and the assembling member 23 are two components that are manufactured separately and then fixed to each other, but not limited to this, the outer tube 21 and the assembling member 23 can also be integrated It is made by forming, such as 3D printing.

The inner tube 24 passes through the outer tube 21 , a flow channel is formed inside the inner tube 24 , the end of the inner tube 24 facing the assembly 23 is a fixed end 241 , and the fixed end 241 of the inner tube 24 is connected to the The front ends of the outer tubes 21 are combined and fixed.

Referring to FIG. 5 to FIG. 7 , the valve plate 25 is non-circular and is disposed at the fixed end 241 of the inner tube 24 , and can selectively close the flow channel of the inner tube 24 .

The piston rod 26 passes through the rear end of the outer tube 21 . The piston rod 26 has a hollow rod body 261 , a piston 262 and a handle 263 . The rod body 261 penetrates the rear end of the outer tube 21 and has an inner end and an outer end, the inner end of the rod 261 protrudes into the outer tube 21 , and the outer end of the rod 261 protrudes from the Outside the outer tube 21 , the inner tube 24 extends into the rod body 261 from the inner end of the rod body 261 . The piston 262 is disposed at the inner end of the rod body 261 and abuts against an inner wall surface of the outer tube 21 . The handle 263 is fixed on the outer end of the rod body 261 . The user can hold the holding base 10 with one hand and the handle 263 with the other hand to pull the piston rod 26 so that the piston 262 of the piston rod 26 is between the outer tube 21 and the inner tube 24 along the outer edge. The axial direction of the tube 21 moves back and forth.

Referring to FIG. 8 and FIG. 9 , when the user is assembling the holding base 10 and the inflator tube set 20 , the assembly element 23 is first inserted into the housing from the air inlet 111 of the housing 11 . 11, let the at least one snap block 14 on the inner wall surface of the housing 11 move along the axially extending section 2311 of the at least one snap groove 231, further refer to FIG. 10, and then drive the outer tube 21 and the assembly member 23 rotate relative to the holding base 10, so that the buckle block 14 moves along the lateral extension 2312 of the buckle groove 231. At this time, the outer tube 21 and the assembly member 23 cannot be moved along the Axially withdrawn from the holder 10 .

Further, when the buckling block 14 is positioned on the laterally extending section 2312 of the buckling slot 231 , the at least one inner fixing hole 232 of the assembly 23 corresponds to the at least one inner fixing hole 232 of the holding base 10 respectively. An outer fixing hole 15 . At this time, a positioning block 18 is inserted into the inner fixing hole 232 and the outer fixing hole 15 corresponding to each group of positions, which can lock the assembly 23 relative to the holding base 10 . position to prevent the assembly member 23 and the outer tube 21 from rotating relative to the holding base 10 , so as to prevent the outer tube 21 and the assembly member 23 from being arbitrarily separated from the holding base 10 .

In the specific embodiment of the present invention, the specific number of the at least one snap block 14 of the holding base 10 includes two snap blocks 14, and the specific number of the at least one outer fixing hole 15 of the holding base 10 In order to include two outer fixing holes 15, correspondingly, the specific number of the at least one snap groove 231 of the assembly 23 is to include two snap grooves 231, and the at least one inner fixing hole 232 of the assembly 23 The specific number includes two inner fixing holes 232, the two snap blocks 14 are located at two opposite positions in the radial direction of the housing 10, and each snap block 14 corresponds to one of the outer fixing holes 15 along the The housings 11 are arranged at intervals in the axial direction. When the two snap blocks 14 are snapped and positioned on the laterally extending sections 2312 of the two snap grooves 231, the two inner fixing holes 232 of the assembly 23 The positions correspond to the two outer fixing holes 15 of the holding base 10 respectively.

The joint assembly 30 is installed at the exhaust port 112 of the housing 11 of the holder 10 . The joint assembly 30 includes a piston tube 31 , a piston 32 and an inflation connector 33 , and the piston tube 31 can be moved from The exhaust port 112 extends into the inner dividing pipe 13 and has an inner end and an outer end. The inner end of the piston pipe 31 faces the intake end 111 of the housing 11 and is located in the inner dividing pipe 13 , the outer end of the piston tube 31 faces and can selectively protrude out of the exhaust port 112 of the housing 11 , and the piston 32 is disposed at the inner end of the piston tube 31 and can separate the tube 13 therein. Moving back and forth, the inflation joint 33 is assembled with the outer end of the piston tube 31 and can be used to connect a product to be inflated.

The air pressure gauge 40 is installed in the accommodating groove 161 of the measuring portion 16 of the holder 10 . Since the accommodating groove 161 communicates with the outer flow channel 114 inside the casing 11 through the first through hole 162 , the The barometer 40 can be used to measure the gas pressure in the outer flow channel 114 .

The pressure relief set 50 is installed in the side channel 171 of the pressure relief portion 17 of the holding base 10 . Since the side channel 171 communicates with the outer flow channel 114 through the second through hole 172 , the user can press the relief The pressure group 50 is used to discharge the gas in the outer flow channel 114 .

As shown in FIG. 3 , when the piston 262 is moved toward the rear end of the outer tube 21 by pulling the piston rod 26 , the air outside the outer tube 21 flows into the interior of the outer tube 21 through the air inlet 211 . Further referring to FIG. 2 , when the piston rod 26 is pushed to move the piston 262 toward the front end of the outer tube 21 , the gas inside the outer tube 21 is blocked by the one-way valve 22 and cannot pass through the inlet. The air hole 211 flows out of the outer tube 21, so the gas inside the outer tube 21 will flow into the inner tube 24 through the hollow rod body 261, and push the valve plate 25 on the fixed end 241 of the inner tube 24 to flow into the inner tube 24. The inner flow channel 113 and the outer flow channel 114 of the holder 10 . The gas flowing into the inner flow channel 113 can further inflate the product to be inflated through the joint assembly 30; the gas flowing into the outer flow channel 114 can allow the gas pressure gauge 40 to measure its gas pressure; The pressure relief group 50, the gas in the product to be inflated can reversely flow to the outer flow channel 114 through the joint assembly 30 and the inner flow channel 113, and then discharged from the pressure relief group 50, thereby adjusting the gas in the product to be inflated. gas pressure.

The advantage of the present invention is that it is firstly positioned in the snap groove 231 of the assembly member 23 of the inflator tube set 20 through the locking block 14 of the holding base 10 , so that the outer tube 21 and the assembly member 23 are locked. It cannot be pulled out from the holding base 10 in the axial direction, and then fit the positioning block 18 into the outer fixing hole 15 and the inner fixing hole 232 corresponding to each set of positions of the holding base 10 and the assembly member 23 , To lock the relative position of the assembly 23 and the holding base 10, to prevent the assembly 23 and the outer tube 21 from rotating relative to the holding base 10, so that the tenon type air pump of the present invention will not be shaken or It can be disassembled arbitrarily due to collision, and when it is sold in the store, it will not be easily disassembled by customers, so as to maintain the integrity of the tenon-type inflator.

Furthermore, the design of the inner flow channel 113 and the outer flow channel 114 formed by the outer dividing tube 12 and the inner dividing tube 13 inside the housing 11 of the holding base 10 can ensure the measurement part of the holding base 11 The first through hole 162 of the 16 is kept in communication with the outer flow channel 114 of the housing 11, so that the air pressure gauge 40 provided in the measuring part 16 can continuously measure the inflation pressure generated by the inflating tube set 20 without being affected by the air pressure. The position of the piston 32 of the joint assembly 30 is affected.

Referring to FIG. 11 , which is another preferred embodiment of the present invention, the difference between the holding base 10A and the aforementioned holding base 10 is that the structure of the inner dividing pipe 13 is omitted, and the joint assembly 30A only includes an air-filled The joint 33A is fixed at the exhaust port 112A of the housing 11A of the holding base 10A, and the high-pressure gas generated by the pressurization of the inflating tube set 20 flows through the outer partition tube 12A and through the The inflation connector 33A inflates the product to be inflated. Wherein, the first through hole 162A of the measuring portion 16A of the holding base 10A can also be kept in communication with the intake end 111A of the housing 11A, so that the barometer 40 provided in the measuring portion 16A can continuously measure The inflation pressure generated by the inflator set 20 .

Claims (9)

1. A tenon-type inflator comprising a holding seat, an inflating tube group and a joint assembly, wherein: The holder has a hollow shell, at least one snap block and at least one outer fixing hole, two ends of the shell respectively form an air inlet and an exhaust port, and the at least one snap block protrudes to form On an inner wall surface of the casing and located near the intake end of the casing, the at least one outer fixing hole is formed through the casing and located close to the intake end of the casing; The air-inflating tube set is assembled on the end of the housing of the holding base where the air inlet end is provided, and the air-inflating tube set includes an outer tube, a set of connectors, an inner tube, a valve plate and a piston rod. The outer tube has a front end and a rear end, the front end of the outer tube faces the holding seat, at least one air inlet hole is formed through the end surface of the front end of the outer tube and a one-way valve is provided, and the one-way valve allows the gas It can only flow into the interior of the outer pipe from the outside of the outer pipe through the air inlet hole. The assembly is a tubular block, which is fixed at the front end of the outer pipe and communicated with the interior of the outer pipe. The assembly has a front end, a rear end, at least one snap groove and at least one inner fixing hole, the rear end of the assembly is fixedly connected with the outer tube, and the at least one snap groove is concavely formed in the assembly On an outer wall surface of the connector, each snap groove is L-shaped and has an axial extension section and a lateral extension section, and the axial extension section extends along the axial direction of the assembly and penetrates through the assembly. At the front end, the lateral extension section is perpendicular to the axial extension section and communicates with the axial extension section, the at least one inner fixing hole is formed through the assembly, and the inner tube is penetrated through the outer tube A flow channel is formed inside the inner tube, the end of the inner tube facing the assembly is a fixed end, the fixed end of the inner tube is fixed in combination with the front end of the outer tube, the valve plate is non-circular, It is located at the fixed end of the inner tube, and can selectively close the flow channel of the inner tube. The piston rod passes through the rear end of the outer tube. The piston rod has a hollow rod body, a piston and a grip The rod body penetrates the rear end of the outer tube and has an inner end and an outer end, the inner tube extends into the rod body from the inner end of the rod body, and the piston is arranged at the inner end of the rod body, and abuts against an inner wall surface of the outer tube, the handle is fixed on the outer end of the rod body; The joint assembly is installed at the exhaust port of the housing of the holder; When assembling the holding base and the air pump assembly, the assembling member is inserted into the casing from the air inlet end of the casing, and the at least one snap block on the inner wall of the casing is first along the at least one The axial extension of a snap groove moves, and then drives the outer tube and the assembly to rotate relative to the holding base, so that the snap block extends along the lateral extension of the snap groove; When the buckling block is positioned on the lateral extension of the buckling groove, the at least one inner fixing hole of the assembly corresponds to the at least one outer fixing hole of the holding base respectively, and each set of positions corresponds to A positioning block is arranged in the corresponding inner fixing hole and the outer fixing hole. 2. The tenon type pump according to claim 1, wherein: The holding base further has an outer dividing pipe, an inner dividing pipe and a measuring part, the outer dividing pipe is arranged in the casing, and opposite ends of the outer dividing pipe are respectively facing the air inlet end and the casing of the casing. In the exhaust port, one end of the outer partition pipe facing the exhaust port is in close contact with the shell, the inner partition pipe is arranged in the outer partition pipe, and the opposite ends of the inner partition pipe face the outer part of the shell respectively. The intake end and the exhaust port, the end of the inner partition pipe facing the exhaust port is in close contact with the casing, an inner flow channel is formed in the inner partition pipe, and the inner flow channel directly communicates with the casing. an exhaust port, an outer flow channel is formed between the outer partition pipe and the inner partition pipe, the outer flow channel only communicates with the inner flow channel of the casing, and the outer flow channel communicates with the exhaust port of the casing through the inner flow channel, the The measuring part is formed on the casing and has a concave accommodating groove, and the accommodating groove communicates with the outer flow channel through a first through hole; The aforementioned joint assembly includes a piston tube, a piston and an inflatable joint, the piston tube movably extends from the exhaust port into the inner partition tube, the piston is arranged at an inner end of the piston tube and can be installed in the inner separation tube. The inner dividing pipe moves back and forth, and the inflatable joint is assembled with an outer end of the piston pipe; The tenon-type air pump further has an air pressure gauge installed in the accommodating groove of the measuring part of the holding base. 3. The tenon type pump according to claim 2, wherein: The holding seat further has a pressure relief portion, the pressure relief portion is formed on the casing and has a side channel, and the side channel is communicated with the outer flow channel through a second through hole; The tenon type air pump further has a pressure relief group, and the pressure relief group is arranged in the side channel of the pressure relief part of the holding seat. 4. The tenon type pump according to claim 1, wherein: The aforementioned holding base further has an outer dividing pipe and a measuring part, the outer dividing pipe is arranged in the casing, and opposite ends of the outer dividing pipe face the intake end and the exhaust port of the casing, respectively. One end of the outer dividing pipe facing the exhaust port is in close contact with the casing, the measuring part is formed on the casing and has a concave accommodating groove, and the accommodating groove is communicated through a first through hole the outer divider; The aforementioned joint assembly includes an inflatable joint, and the inflatable joint is fixed at the exhaust port of the housing of the holding base; The tenon type air pump further has an air pressure gauge installed in the accommodating groove of the measuring part of the holding base. 5. The tenon type pump according to claim 4, wherein: The holding seat further has a pressure relief portion, the pressure relief portion is formed on the casing and has a side channel, and the side channel communicates with the outer partition pipe through a second through hole; The tenon type air pump further has a pressure relief group, and the pressure relief group is arranged in the side channel of the pressure relief part of the holding seat. 6. The tenon-type air pump according to any one of claims 1 to 5, wherein the specific quantity of the at least one snap block of the holding base includes two snap blocks, and the The specific number of the at least one snap slot includes two snap slots. 7 . The tenon-type air pump of claim 6 , wherein the specific number of the at least one outer fixing hole of the holding base includes two outer fixing holes, and the at least one inner fixing hole of the assembly element. 8 . The specific number is to contain two internal fixation holes. 8 . The tenon-type air pump according to claim 7 , wherein each of the locking blocks of the holding base and the outer fixing holes corresponding to a position thereof are arranged at intervals along the axial direction of the housing. 9 . 9 . The tenon type inflator according to claim 6 , wherein the two locking blocks of the holding base are located at two opposite positions in the radial direction of the housing. 10 .

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