CN209855987U - Inflator - Google Patents

Abstract

The utility model discloses an inflator contains the tuyere head and the regulation seat mechanism of installing at cylinder mechanism both ends, wears to locate the little cylinder in the big cylinder and organizes with its front end and connect in the tuyere head, and big cylinder organizes with wearing to locate communicating pipe in the little cylinder and connect in adjusting seat mechanism, and big cylinder front end is equipped with the cover support in the outer one-way inlet end plug of little cylinder, little cylinder rear end are provided with the stopper and support in the two-way piston between big cylinder and intercommunication intertube, and the communicating pipe front end is provided with and leans on the one-way piston in little cylinder, and one-way piston and intercommunication intertube are equipped with first check valves, and the little cylinder front end is equipped with second check valves. Through the structural design of the air cylinder mechanism, the component members of the whole inflator and the members needing fine processing can be reduced, the processing and manufacturing cost and the reject ratio of products are reduced, and the product quality is improved relatively.

Description

Inflator

Technical Field

The utility model relates to an inflate the device, especially relate to a manual formula inflater.

Background

In recent years, the trend of driving is prosperous, many bicycle sportsmen like to enjoy the pleasure of riding the wind and flying in the outsides, and in order to avoid the tire from breaking and being flat, the bicycle sportsmen usually carry a tire repair device or a spare tire and also carry a small-sized manual inflator, so the small-sized manual inflator is almost necessary equipment of the bicycle. To improve the pumping efficiency, some air pumps have a function of performing work in two directions, such as the air pump disclosed in taiwan patent No. 263020. Although the inflator has a bidirectional work doing design with an inflating function in the bidirectional movement process of pushing, pulling and stretching, the components of the inflator comprise a plurality of tiny components which are required to be finely processed, the processing cost of the inflator is increased by the components which are required to be finely processed, the reject ratio is high easily, and the improvement space is still provided.

SUMMERY OF THE UTILITY MODEL

The object of the present invention is to provide an inflator that can improve at least one of the drawbacks of the prior art.

The purpose of the utility model is realized through the following technical scheme:

the utility model discloses inflater contains the tuyere head, extends around and with its preceding tip group connect in the cylinder mechanism of tuyere head, and one install the adjusting seat mechanism of tip behind the cylinder mechanism. The air cylinder mechanism comprises a large air cylinder, a small air cylinder inserted in the large air cylinder and connected with the air nozzle head in a communicating mode through the front end of the small air cylinder, a communicating pipe inserted in the small air cylinder, a one-way air inlet end plug fixed at the front end of the large air cylinder and sleeved outside the small air cylinder, a two-way piston fixed at the rear end of the small air cylinder and plugged between the large air cylinder and the communicating pipe, a one-way piston communicated with the communicating pipe and fixed at the front end of the communicating pipe and abutted inside the small air cylinder, a first check valve group arranged between the one-way piston and the communicating pipe, and a second check valve group for sealing the front end of the small air cylinder. The adjusting seat mechanism is fixedly connected between the large cylinder and the rear end of the communicating pipe and can be switched between a pressure relief state and a closing state.

When the cylinder mechanism extends, the first space of the large cylinder sucks external air through the adjusting seat mechanism, the second space of the large cylinder extrudes the air into the third space of the small cylinder, the air is injected into the fourth space of the small cylinder through the one-way piston, and the second check valve group is driven to be opened by positive pressure gas in the fourth space. When the cylinder mechanism shortens, the second space will via the inspiratory external air of one-way end plug that admits air pours into the third space, and in adjust seat mechanism is in during the closed condition, first space can be impressed the air communicating pipe, first check valve group can by the drive of the malleation gas in the communicating pipe is opened, and in adjust seat mechanism is in when the pressure release state, adjust seat mechanism can let out the malleation gas of first space.

The inflater, adjust seat mechanism including fixing the big cylinder with the back tip of communicating pipe within a definite time adjusts the pedestal, and installs adjust the check valve and the exhaust valves of pedestal, it has the intercommunication to adjust the pedestal first space and external inlet port and exhaust hole, the check valve can by negative pressure effort drive in the first space is opened and is sealed the inlet port, the exhaust valves can be operated and is opened the ground and seal the exhaust hole, adjust seat mechanism and be in during the pressure release state, the exhaust valves is not sealed the exhaust hole, the exhaust hole can be with the malleation gas in first space to the external world of letting out, adjust seat mechanism and be in during the closed condition, the exhaust valves is sealed the exhaust hole.

Inflater, the inlet port is concave to be located adjust the pedestal outer peripheral face, the check valve be the ring cover in adjust the pedestal, and airtight isolation first space with the inlet port, the check valve has the ring cover and is positioned adjust the ring cover portion of pedestal outer peripheral face, and certainly ring cover portion radially outwards and forward slope projection and ability elastic deformation ground gas is airtight lean on to in the airtight ring portion of big cylinder inner peripheral face.

Inflater, the exhaust hole has the intercommunication the aperture section in first space, and the intercommunication aperture section and external large aperture section, the exhaust valves including set up in just can seal in the large aperture section the closure of aperture section, and set up in adjust the regulating part of pedestal, adjust the seat mechanism in during the off-state, the closure quilt the regulating part supports to push against to aperture section and seal aperture section, adjust the seat mechanism in during the pressure release state, the regulating part breaks away from the closure, the closure can by the gaseous promotion of malleation in the aperture section makes aperture section intercommunication the large aperture section.

The inflater, the regulating part have can be operated rotatory ground cover to be located adjust the outer regulation ring portion of seat, and can by adjust the support of ring portion interlock displacement and press the convex part, the regulating part can be operated rotatory and not with support and press the convex part to push away the position that breaks away from of closing part, and with support and press the convex part will the closing part supports to push away to aperture section and seal the closed position of aperture section changes between.

Inflater, regulation seat mechanism still including set up in adjust the pedestal with between the regulating part, and make the regulating part can be transferred and positioned in the closed position with the locating component who breaks away from the position.

The inflator of the present invention, the vent hole is formed to extend forward and backward, the closure is disposed in the large bore section so as to be displaceable forward and backward, the adjusting member further has a linking wall portion connected to the inner peripheral side of the adjusting ring portion and facing the rear end side of the adjusting seat body, the abutting convex portion is disposed protrudingly on the front side of the linking wall portion so as to be urged forward against the closure, the adjusting seat body further has an insertion groove recessed on the rear end face thereof, two positioning grooves are recessed at intervals on the front side of the linking wall portion, the positioning member has a positioning member disposed in the insertion groove so as to be displaceable forward and backward, and an elastic member disposed in the insertion groove and having an elastic force urging the positioning member backward against the linking wall portion, the positioning member is urged backward by the elastic member so as to be detachably engaged with any one of the positioning grooves, so that the adjusting piece can be rotated and positioned at the disengaging position and the closing position.

The inflator of the utility model, the one-way piston comprises a piston body which is fixed at the front end part of the communicating pipe and is provided with an axial direction communicating the fourth space and the shaft hole of the communicating pipe, and an airtight gasket which is axially movably sleeved on the piston body and is airtightly abutted against the inner circumferential surface of the small cylinder, the piston body is provided with an outer annular groove which is concavely arranged on the outer circumferential surface of the piston body and is used for sleeving the airtight gasket, and a communicating gap which axially extends and communicates the outer annular groove and the fourth space, when the one-way piston moves backwards relative to the small cylinder, the airtight gasket does not seal the communicating gap, the third space is communicated with the fourth space, when the one-way piston moves forwards relative to the small cylinder, the airtight gasket seals the communicating gap, and airtightly separates the third space and the fourth space, the first check valve group is provided with an annular valve seat which is communicated between the communicating pipe and the shaft hole, and a check valve member which is arranged in the annular valve seat and can be driven by the positive pressure gas in the communication pipe to open and close the annular valve seat.

Inflater, the second check valves is including fixing in the tip before the little cylinder and intercommunication the tuyere head with the cyclic annular valve piece in fourth space, and set up in just can by in the cyclic annular valve piece the malleation gas drive in fourth space is opened and is sealed the check valve piece of cyclic annular valve piece.

The beneficial effects of the utility model are mainly embodied in that: through the structural design of the adjusting seat mechanism and the air cylinder mechanism, the component members of the whole inflator can be obviously reduced, the processing and manufacturing cost is reduced, and the defective rate of products and the component members can be relatively reduced and the product quality is relatively improved due to the reduction of the component members needing fine processing.

Drawings

Other features and advantages of the present invention will become apparent from the following detailed description of the preferred embodiments with reference to the accompanying drawings, in which:

fig. 1 is a perspective view of an embodiment of the pump of the present invention;

FIG. 2 is an exploded perspective view of the embodiment;

FIG. 3 is a side cross-sectional view of the embodiment;

FIG. 4 is a side cross-sectional view of the embodiment illustrating the situation when a large cylinder is pulled back against a nozzle head;

FIG. 5 is an enlarged view of a portion of FIG. 4;

FIG. 6 is a side cross-sectional view of the embodiment illustrating the large cylinder being pushed forward relative to the nozzle tip when the adjuster mechanism is in a closed position;

FIG. 7 is an enlarged view of a portion of FIG. 6;

fig. 8 is a view similar to fig. 7, illustrating the case when the large cylinder is pushed forward relative to the nozzle head in a pressure relief state of the regulator seat mechanism.

Detailed Description

Before the present invention is described in detail, it should be noted that in the following description, similar components are denoted by the same reference numerals.

As shown in fig. 1, 2 and 3, the embodiment of the pump 200 of the present invention is suitable for inflating a subject (not shown) to be inflated, such as but not limited to a tire or a ball. The inflator 200 includes a nozzle head 3, a cylinder mechanism 4 extending forward and backward and mounted at its front end to the nozzle head 3, and an adjusting seat mechanism 5 mounted at the rear end of the cylinder mechanism 4. The nozzle head 3 is used for being installed on the object to be inflated and can be used for outputting gas for inflating the object to be inflated. The types of the nozzle heads 3 are numerous and are not important in the creation of the present invention, and therefore, detailed description is omitted, and the embodiment is not limited by the drawings.

The cylinder mechanism 4 includes a small cylinder 42 extending in the front-rear axial direction and connected to the nozzle tip 3 by its front end in a communicating manner, a large cylinder 41 sleeved outside the small cylinder 42 forward, a communicating pipe 43 inserted in the small cylinder 42 forward, a two-way piston 45 fixed to the rear end of the small cylinder 42 and airtightly pressed between the large cylinder 41 and the communicating pipe 43, a one-way air inlet end plug 44 fixed to the front end of the large cylinder 41 and sleeved outside the small cylinder 42, a one-way piston 46 fixed to the front end of the communicating pipe 43 and pressed against the inner circumferential surface of the small cylinder 42, a first check valve group 47 installed between the one-way piston 46 and the communicating pipe 43, and a second check valve group 48 installed and fixed to the front end of the small cylinder 42.

The bidirectional piston 45 partitions the inside of the large cylinder 41 into a first space 401 and a second space 402 on axially opposite sides thereof. The communication pipe 43 has a through hole 430 radially penetrating the rear end thereof and communicating with the first space 401.

The one-way intake end plug 44 is capable of one-way communicating the second space 402 with the outside, and includes an end block 441 fixed to the rear end of the large cylinder 41 and sleeved outside the small cylinder 42, and an airtight gasket 442 axially movably disposed on the end block 441 in the front-rear direction and airtightly sleeved on the outside of the small cylinder 42. When the one-way air inlet plug 44 moves backward relative to the small cylinder 42, the one-way air inlet plug 44 seals the second space 402 from the outside air, and when the one-way air inlet plug 44 moves forward relative to the small cylinder 42, the one-way air inlet plug 44 communicates the second space 402 with the outside air, so that the outside air can enter the second space 402. Since the structure of the end plug capable of conducting the second space 402 in one direction with the outside is designed in many ways, it is not described in detail and the implementation is not limited by the drawings.

As shown in fig. 2, 4 and 5, the one-way piston 46 divides the interior of the small cylinder 42 into a third space 403 and a fourth space 404 which are axially opposite to each other. The small cylinder 42 has a through hole 420 radially passing through the rear end portion thereof and passing through the second space 402 and the third space 403. The one-way piston 46 includes a piston body 461 fixed to the front end of the communication pipe 43, and an airtight gasket 465 covering the piston body 461 in a back and forth displaceable manner and airtightly abutting against the inner circumferential surface of the small cylinder 42. The piston body 461 has a shaft hole 462 axially penetrating and communicating the communication pipe 43 and the fourth space 404, an outer ring groove 463 recessed on the outer circumferential surface thereof and receiving the airtight gasket 465, and two communication notches 464 axially extending and communicating the outer ring groove 463 and the fourth space 404. When the one-way piston 46 moves backward relative to the small cylinder 42, the airtight gasket 465 does not close the communication notch 464, the one-way piston 46 communicates with the third space 403 and the fourth space 404, when the one-way piston 46 moves forward relative to the small cylinder 42, the airtight gasket 465 closes a gap between the piston body 461 and the small cylinder 42, and the one-way piston 46 airtightly separates the third space 403 and the fourth space 404. Since the one-way piston 46 capable of conducting the third space 403 and the fourth space 404 in one direction is various, the implementation is not limited to the above structure.

The first check valve group 47 includes an annular valve seat 471 disposed between the front end of the communication pipe 43 and the piston body 461 to communicate the communication pipe 43 with the shaft hole 462, and a check valve 472 disposed in the annular valve seat 471 in a back-and-forth displaceable manner. When the gas pressure in the fourth space 404 is greater than the gas pressure in the communication pipe 43, the first check valve group 47 is driven to close by the positive pressure gas in the fourth space 404 to hermetically separate the communication pipe 43 from the fourth space 404, and when the gas pressure in the fourth space 404 is less than the gas pressure in the communication pipe 43, the first check valve group 47 is driven to open by the positive pressure gas in the communication pipe 43 to enable the one-way piston 46 to communicate the communication pipe 43 with the fourth space 404.

The second check valve group 48 includes an annular valve block 481 fixed in the front end portion of the small cylinder 42 and communicating the nozzle head 3 with the fourth space 404, and a check valve 482 provided in the annular valve block 481. When the gas pressure in the nozzle tip 3 is greater than the gas pressure in the fourth space 404, the second check valve set 48 is driven to close by the positive pressure gas in the nozzle tip 3 to hermetically separate the nozzle tip 3 from the fourth space 404, and when the gas pressure in the nozzle tip 3 is less than the gas pressure in the fourth space 404, the second check valve set 48 is driven to open by the positive pressure gas in the fourth space 404 to communicate the nozzle tip 3 with the fourth space 404.

Since the first check valve group 47 and the second check valve group 48 have various structures, the check valve groups are not limited to the above structure in practice.

As shown in fig. 2, 7 and 8, the adjusting seat mechanism 5 includes an adjusting seat body 51 fixed between the large cylinder 41 and the right end of the communicating pipe 43, and a check valve 52, an exhaust valve set 53 and a positioning assembly 54 mounted on the adjusting seat body 51. The adjusting seat body 51 has an air outlet 512 penetrating the first space 401 from front to back and communicating with the outside, a plurality of air inlets 511 recessed along the periphery thereof at intervals and extending from front to back to communicate with the outside and the first space 401, and an insertion groove 515 recessed in the rear end surface thereof. The exhaust hole 512 has a small-aperture section 513 communicating with the first space 401, and a large-aperture section 514 communicating with the small-aperture section 513 and the outside.

The check valve 52 has a ring portion 521 fitted around the outer peripheral surface of the adjustment base 51, and an airtight ring portion 522 projecting radially outward from the ring portion 521 and obliquely forward and elastically deformable to airtightly abut against the inner peripheral surface of the large cylinder 41. The gas-tight ring 522 is elastically deformed by the positive pressure gas entering the gas inlet hole 511 from the outside to allow the outside gas to enter the first space 401, but is driven by the positive pressure gas in the first space 401 to radially and outwardly tightly abut against the inner circumferential surface of the large cylinder 41 to hermetically separate the gas inlet hole 511 from the first space 401.

The exhaust valve set 53 includes a spherical closing member 531 disposed in the large-diameter section 514 of the exhaust hole 512 in a back-and-forth displaceable manner, and an adjusting member 532 disposed around the adjusting seat 51 in an operable and rotatable manner. The adjusting member 532 has a linking wall 534 rotatably and coaxially pivoted on the rear end surface of the adjusting base 51, an adjusting ring 533 protruding forward from the linking wall 534 and sleeved outside the adjusting base 51, and a pressing protrusion 536 protruding on the front side surface of the linking wall 534. The front side of the linkage wall 534 is also provided with two positioning grooves 535 at intervals. The adjusting ring portion 533 can be operated to rotate, and the linking wall portion 534 is linked to drive the pressing protrusion 536 to rotate and displace relative to the adjusting seat 51, so that the adjusting member 532 can be switched between a closed position where the pressing protrusion 536 is forced forward to abut against the closing member 531 to make the closing member 531 close the small aperture section 513, and a disengaged position where the pressing protrusion 536 is disengaged from the closing member 531.

The positioning assembly 54 has a spherical positioning member 541 disposed in the insertion groove 515 so as to be movable back and forth, and an elastic member 542 disposed in the insertion groove 515. The positioning element 541 is pushed by the elastic element 542 backwards to the linkage wall 534, and is detachably engaged with any one of the positioning grooves 535, so that the adjusting element 532 can be rotated and positioned between the closing position and the disengaging position.

When the adjusting seat mechanism 5 is in the pressure relief state, the adjusting member 532 of the exhaust valve set 53 is adjusted to the disengaged position, as shown in fig. 8, the sealing member 531 can be pushed back by the positive pressure gas from the first space 401, and exhaust the gas to the outside through the exhaust hole 512. When the adjusting seat mechanism 5 is in the closed state, the adjusting member 532 is turned to the closed position, as shown in fig. 7, the closing member 531 drives and closes the small-bore section 513, so that the first space 401 cannot be exhausted to the outside through the exhaust hole 512.

The utility model discloses during the use of inflater 200, will the tuyere head 3 is installed in treating the object of aerifing after, and the user is operatable exhaust valve group 53 regulating part 532 switches over whole regulation seat mechanism 5 with the selection extremely pressure release state or closed condition. Then, the air nozzle head 3 is held by one hand, the large air cylinder 41 is held by the other hand, and the large air cylinder 41 is pushed and pulled back and forth relative to the air nozzle head 3 to perform an air pumping action.

As shown in fig. 3, 4 and 5, in the process of pulling the large cylinder 41 backward relative to the nozzle tip 3 to extend the cylinder mechanism 4, the large cylinder 41 drives the communicating pipe 43 via the adjusting seat mechanism 5 to synchronously move backward relative to the small cylinder 42, the one-way intake end plug 44 and the one-way valve 52 are communicated to move backward relative to the small cylinder 42, the one-way intake end plug 44 is closed, and the one-way piston 46 is opened to communicate the fourth space 404 with the third space 403. In this process, the first space 401 is gradually enlarged, the second space 402 is gradually reduced, the third space 403 is gradually reduced, and the fourth space 404 is gradually enlarged.

The gradually increasing first space 401 generates a negative pressure force for opening the check valve 52, so that the external air can be sucked through the air inlet 511 and the check valve 52, as indicated by the arrow 801. The gradually decreasing second space 402 will press the internal air into the gradually decreasing third space 403 and into the gradually increasing fourth space 404 via the one-way piston 46, as the direction of the air flow is indicated by the arrow 801.

At this time, if the gas pressure in the fourth space 404 is smaller than the gas pressure in the nozzle head 3, the rear second check valve set 48 is closed, and the fourth space 404 is pre-compressed to store gas; on the contrary, if the gas pressure in the fourth space 404 is greater than the gas pressure in the nozzle head 3, the positive pressure gas in the fourth space 404 drives the second check valve set 48 to open, and the positive pressure gas is introduced into the nozzle head 3 through the second check valve set 48, so as to be used for inflating the object to be inflated.

When the one-way inlet end plug 44 is moved back against the two-way piston 45 to limit it, the cylinder mechanism 4 has reached its maximum extension limit. Then, the large cylinder 41 is pushed forward and compressed relative to the air nozzle head 3, and the small cylinder 42 is driven to retract back into the large cylinder 41, so that the cylinder mechanism 4 is shortened until the unidirectional air inlet plug 44 is limited forward and abuts against the air nozzle head 3.

As shown in fig. 6 and 7, during the process of compressing the cylinder mechanism 4, the one-way intake end plug 44 is opened, the one-way piston 46 is closed to hermetically separate the third space 403 from the fourth space 404, the first space 401 and the fourth space 404 are gradually reduced, and the second space 402 and the third space 403 are gradually increased. The second space 402 gradually increasing will suck in the outside air through the one-way air inlet plug 44 and inject the air into the third space 403 gradually increasing, as shown by the arrow 802. The gradually decreasing fourth space 404 compresses the internal air, and when the internal air pressure is greater than the air pressure in the nozzle head 3, the second check valve set 48 is driven to open, so as to inject positive pressure air into the nozzle head 3, as indicated by the arrow 802.

At the same time, when the adjusting seat mechanism 5 is in the closed state, the exhaust valve group 53 closes the exhaust hole 512, so that the first space 401 gradually becoming smaller also pushes the internal air into the communication pipe 43, as shown by the arrow 803. When the gas pressure in the communication pipe 43 is higher than the gas pressure in the fourth space 404, the positive pressure gas in the communication pipe 43 drives the first non-return valve 472 to open, so as to compress and inject the air into the fourth space 404, as indicated by the arrow 803. That is, when the adjusting seat mechanism 5 is in the closed state, the nozzle tip 3 outputs the air in the fourth space 404 and the air in the first space 401 simultaneously for inflation.

As shown in fig. 8, when the adjusting seat mechanism 5 is in the pressure relief state, the exhaust valve set 53 is opened and no longer closes the exhaust hole 512, so when the first space 401 is compressed, the positive pressure gas generated by the compression in the first space 401 pushes the closing member 531 in the exhaust hole 512 open, and is discharged to the outside from the exhaust hole 512, as shown by an arrow 804, so that when the cylinder mechanism 4 is compressed, only the gas in the fourth space 404 is pressed into the nozzle head 3 to inflate the object to be inflated.

Through adjust seat mechanism 5 can be in the closed condition with the design that switches between the pressure release state adjust seat mechanism 5 switch to when the closed condition, can use first space 401 with the gas that is compressed in the fourth space 404 is right simultaneously wait to aerify the object, be applicable to wait to aerify when aerifing the object inside and being in low atmospheric pressure state, aerify with a large amount of air, improve the inflation speed. When the interior of the object to be inflated is inflated to a certain pressure or more, and the large cylinder 41 is not easily pushed to perform the inflation operation, the adjusting seat mechanism 5 can be switched to the pressure relief state, so as to release the air in the first space 401, and only compress the air in the fourth space 404 to perform the inflation operation, so that the high-pressure inflation of the object to be inflated is more labor-saving and easy to operate.

In summary, by the structural design of the adjusting seat mechanism 5 and the cylinder mechanism 4, the number of components of the entire inflator 200 can be significantly reduced, which is helpful for reducing the manufacturing cost, and the number of components requiring fine processing is reduced, so that the reject ratio of products and components can be relatively reduced, and the product quality can be relatively improved.

In addition, by matching with the design that the adjusting seat mechanism 5 can be switched between the closed state and the pressure relief state, the adjusting seat mechanism 5 can be selectively adjusted to the closed state with larger air inflow in the middle and low air pressure inflation stages of the object to be inflated, a large amount of air can be compressed and injected into the object to be inflated in one push-pull process, and the inflation efficiency of the object to be inflated in the middle and low air pressure stages can be improved. When the object to be inflated is inflated to a certain high pressure, the adjusting seat mechanism 5 may be switched to the pressure relief state, so that the compressed gas in the first space 401 may be released through the exhaust hole 512, and the resistance for pressing the small cylinder 42 into the large cylinder 41 is reduced, so that the object to be inflated is more labor-saving when inflated at a high pressure. Therefore, the inflator 200 of the present invention is really a convenient and practical innovative design, and can really achieve the purpose of the present invention.

The above list of details is only for the practical implementation of the present invention, and they are not intended to limit the scope of the invention, and all the simple equivalent changes and modifications made according to the claims and the patent specification are still included in the scope of the present invention.

Claims (9)

1. An inflator, comprising a nozzle head, a cylinder mechanism extending forwards and backwards and assembled and connected with the nozzle head by the front end part of the cylinder mechanism, and an adjusting seat mechanism arranged at the rear end part of the cylinder mechanism, wherein: the air cylinder mechanism comprises a large air cylinder, a small air cylinder which is inserted into the large air cylinder and is connected with the air nozzle head in a communicating mode through the front end of the small air cylinder, a communicating pipe which is inserted into the small air cylinder, a one-way air inlet end plug which is fixed at the front end of the large air cylinder and is sleeved outside the small air cylinder, a two-way piston which is fixed at the rear end of the small air cylinder and is plugged between the large air cylinder and the communicating pipe, a one-way piston which is communicated with the communicating pipe and is fixed at the front end of the communicating pipe and is abutted inside the small air cylinder, a first check valve group which is arranged between the one-way piston and the communicating pipe, and a second check valve group which seals the front end of the small air cylinder, wherein the adjusting seat mechanism is fixedly connected between the large air cylinder and the rear end of the communicating pipe and can be switched between a pressure; when the cylinder mechanism extends, the first space of the large cylinder sucks in outside air through the adjusting seat mechanism, the second space of the large cylinder extrudes the air into the third space of the small cylinder and injects the air into the fourth space of the small cylinder through the one-way piston, and the second check valve group is driven to open by positive pressure gas in the fourth space; when the cylinder mechanism shortens, the second space will via the inspiratory external air of one-way end plug that admits air pours into the third space, and in adjust seat mechanism is in during the closed condition, first space can be impressed the air communicating pipe, first check valve group can by the drive of the malleation gas in the communicating pipe is opened, and in adjust seat mechanism is in when the pressure release state, adjust seat mechanism can let out the malleation gas of first space.

2. The pump according to claim 1, characterized in that: the adjusting seat mechanism comprises a large cylinder, an adjusting seat body and a check valve and an exhaust valve group, wherein the adjusting seat body is fixed between the large cylinder and the rear end part of the communicating pipe, the check valve and the exhaust valve group are installed on the adjusting seat body, the adjusting seat body is provided with a communicating hole, the first space and the external air inlet hole and the air exhaust hole are communicated, the check valve can be opened and closed by the driving of negative pressure acting force in the first space, the exhaust valve group is closed by operation, the exhaust hole is not closed by the exhaust valve group when the adjusting seat mechanism is in a pressure relief state, the exhaust hole can discharge positive pressure gas in the first space to the external, the adjusting seat mechanism is in the closing state, and the exhaust valve group is closed by the exhaust hole.

3. The pump according to claim 2, characterized in that: the air inlet is concavely arranged on the peripheral surface of the adjusting base body, the one-way valve is sleeved on the adjusting base body in a sleeved mode and hermetically separates the first space from the air inlet, and the one-way valve is provided with a ring sleeve portion and an airtight ring portion, wherein the ring sleeve portion is positioned on the peripheral surface of the adjusting base body, and the airtight ring portion extends outwards in the radial direction of the ring sleeve portion and slantways forwards to protrude and can elastically deform and is hermetically abutted against the inner peripheral surface of the large air cylinder.

4. The pump according to claim 2, characterized in that: the exhaust hole has the intercommunication the small aperture section in first space, and the intercommunication small aperture section and external big aperture section, exhaust valve group including set up in the big aperture section and can seal the closure of small aperture section, and set up in adjust the regulating part of pedestal, adjust the seat mechanism in during the closed condition, the closure is by the regulating part supports to push against to small aperture section and seal the small aperture section, adjust the seat mechanism in during the pressure release state, the regulating part breaks away from the closure, the closure can by the gaseous promotion of malleation in the small aperture section makes the small aperture section intercommunication the big aperture section.

5. The pump according to claim 4, characterized in that: the adjusting piece is provided with an adjusting ring portion which can be operated to rotationally sleeve the outside of the adjusting seat body, and a pressing convex portion which can be interlocked and displaced by the adjusting ring portion, and the adjusting piece can be operated to rotate to change between a separation position where the pressing convex portion does not press the closing piece, and a closing position where the pressing convex portion presses the closing piece against the small-aperture section to close the small-aperture section.

6. The pump according to claim 5, characterized in that: the adjusting seat mechanism further comprises a positioning component which is arranged between the adjusting seat body and the adjusting piece and enables the adjusting piece to be positioned at the closing position and the separating position in a rotating mode.

7. The pump according to claim 6, characterized in that: the exhaust hole is in a front-back extending shape, the closing piece is arranged in the large-aperture section in a front-back displacement manner, the adjusting piece is also provided with a linkage wall part which is connected with the inner peripheral side of the adjusting ring part and faces the rear end side of the adjusting seat body, the pressing convex part is arranged on the front side surface of the linkage wall part in a protruding way and can be pressed against the closing part forwards, the adjusting seat body is also provided with an embedded groove concavely arranged on the rear end surface thereof, the front side surface of the linkage wall part is concavely provided with two positioning grooves at intervals, the positioning component is provided with a positioning piece which can be arranged in the embedding groove in a front-back displacement manner, and an elastic piece which is arranged in the embedding groove and has elastic force which constantly pushes the positioning piece back against the linkage wall part, the positioning piece can be elastically pushed backwards by the elastic piece and can be detachably clamped in any one of the positioning grooves, so that the adjusting piece can be adjusted and positioned at the separation position and the closing position.

8. The pump according to claim 1, characterized in that: the one-way piston comprises a piston body which is fixed at the front end part of the communicating pipe and is provided with a shaft hole axially communicating the fourth space and the communicating pipe, and an airtight gasket which is axially movably sleeved on the piston body and is airtightly abutted against the inner circumferential surface of the small cylinder, the piston body is provided with an outer ring groove which is concavely arranged on the outer circumferential surface of the piston body and is used for sleeving the airtight gasket, and a communicating gap axially extending and communicating the outer ring groove and the fourth space, when the one-way piston moves backwards relative to the small cylinder, the airtight gasket does not seal the communicating gap, the third space is communicated with the fourth space, when the one-way piston moves forwards relative to the small cylinder, the airtight gasket seals the communicating gap and airtightly separates the third space and the fourth space, and the first check valve group is provided with an annular valve seat communicated between the communicating pipe and the shaft hole, and a check valve member which is arranged in the annular valve seat and can be driven by the positive pressure gas in the communication pipe to open and close the annular valve seat.

9. The pump according to claim 1, characterized in that: the second check valve group comprises an annular valve block which is fixed in the front end part of the small cylinder and is communicated with the air nozzle head and the fourth space, and a check valve piece which is arranged in the annular valve block and can be driven by positive pressure gas in the fourth space to open and close the annular valve block.