TWM580131U - Inflator - Google Patents

Abstract

An inflator includes a tuyere and an adjustment seat mechanism mounted at both ends of a cylinder mechanism. The small cylinder that is inserted into the large cylinder is connected to the tuyere head with its front end, and the large cylinder and the communication tube that is inserted into the small cylinder are assembled to the adjustment seat mechanism. The front end of the large cylinder is provided with a one-way intake end plug which is sleeved outside the small cylinder. The rear end of the small cylinder is provided with a two-way piston which is plugged between the large cylinder and the communication tube, and the front end of the communication tube is arranged to abut against the small cylinder. The one-way piston has a first check valve group between the one-way piston and the communication tube, and a second check valve group at the front end of the small cylinder. Through the above-mentioned cylinder mechanism structure design, the components of the entire pump and the components to be finely processed can be reduced, which helps to reduce the manufacturing cost and the defective rate of the product, and relatively improve the product quality.

Description

Inflator

The present invention relates to a gas pumping device, and more particularly to a manual air pump.

In recent years, bicycle sports have flourished. Many cyclists like to enjoy the thrill of riding in the suburbs. In order to avoid the rupture of tires on the way, they usually carry tire repair tools or spare tires, and also carry small manual pumps. Therefore, the manual small inflator is almost an essential equipment for bicycles. In order to improve the efficiency of pumping, some inflators have the function of two-way work, such as the pump disclosed in Taiwan Patent No. 2,630,020. Although the pump has a two-way design of the pumping function during the two-way operation of the push-pull expansion and contraction, since the constituent members include a plurality of fine members that are subjected to fine processing, such a member to be finely processed increases the inflator. The processing cost is also easy to cause the non-performing rate to be high, and there is still room for improvement.

Accordingly, it is an object of the present invention to provide an inflator that improves at least one of the disadvantages of the prior art.

Accordingly, the air pump of the present invention comprises a tuyere head, a cylinder mechanism in which the front end portion is coupled to the tuyeres, and an adjustment seat mechanism mounted on the rear end portion of the cylinder mechanism. The cylinder mechanism comprises a large cylinder which is extended forward and backward and arranged radially inwardly, a small cylinder connected to the tuyer head with a front end thereof and a connecting tube, and a fixed end of the large cylinder and a sleeve abutting a one-way intake plug outside the small cylinder, a two-way piston fixed to the rear end of the small cylinder and having a plug between the large cylinder and the communication pipe, and a communication between the communication pipe and the small cylinder fixed to the communication The front end of the tube abuts against the one-way piston in the small cylinder, a first check valve group disposed between the one-way piston and the communication tube, and a second check valve group that closes the front end of the small cylinder. The adjusting seat mechanism is fixed between the large cylinder and the rear end of the connecting pipe, and is switchable between a pressure releasing state and a closing state.

When the cylinder mechanism is extended, a first space of the large cylinder draws outside air through the adjusting seat mechanism, and a second space of the large cylinder squeezes air into a third space of the small cylinder, and passes through the one-way The piston is injected into a fourth space of the small cylinder, and the second check valve group is driven to be driven by the positive pressure gas of the fourth space. When the cylinder mechanism is shortened, the second space injects outside air sucked in through the one-way air intake plug into the third space, and when the adjusting seat mechanism is in the closed state, the first space presses air into the first space. The communication tube, the first check valve group is driven to be driven by the positive pressure gas in the communication tube, and when the adjustment seat mechanism is in the pressure relief state, the adjustment seat mechanism vents the positive of the first space Pressure gas.

The utility model has the advantages that the structural design of the adjusting seat mechanism and the cylinder mechanism can significantly reduce the components of the entire pump, thereby contributing to the reduction of the manufacturing cost and the reduction of the components required for the fine machining. Relatively reduce the defect rate of products and components, and relatively improve product quality.

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

Referring to Figures 1, 2, and 3, an embodiment of the present invention is adapted to inflate an article to be inflated (not shown) such as, but not limited to, a tire or ball. The inflator 200 includes a tuyere 3, a cylinder mechanism 4 extending forward and backward and having a front end portion attached to the tuyer head 3, and an adjustment seat mechanism 5 attached to a rear end portion of the cylinder mechanism 4. The tuyer head 3 is for mounting on the item to be inflated, and can be used to output a gas for inflating the item to be inflated. Since the wind mouth head 3 has many types and is not the focus of the novel creation, it will not be described in detail, and the implementation is not limited to the schema.

The cylinder mechanism 4 includes a small cylinder 42 extending axially forward and backward and having a front end connected to the tuyer head 3, a large cylinder 41 sleeved outwardly from the small cylinder 42, and a cartridge inserted forwardly. a communication pipe 43 in the small cylinder 42 , a two-way piston 45 fixed to the rear end portion of the small cylinder 42 and a gas-tight plug between the large cylinder 41 and the communication pipe 43 , and one fixed to the front end portion of the large cylinder 41 And a one-way intake plug 44 that is fixed to the outside of the small cylinder 42 and a one-way piston 46 that is fixed to the front end portion of the communication pipe 43 and abuts against the inner circumferential surface of the small cylinder 42 A first check valve block 47 between the piston 46 and the communication pipe 43, and a second check valve block 48 fixed to the front end of the small cylinder 42.

The two-way piston 45 partitions the interior of the large cylinder 41 into a first space 401 and a second space 402 on opposite sides of the axial direction thereof. The communication tube 43 has a through hole 430 that is radially disposed at a rear end portion thereof and communicates with the first space 401.

The one-way air inlet plug 44 can unidirectionally communicate with the second space 402 and the outside, and includes an end block 441 fixed to the rear end portion of the large cylinder 41 and sleeved outside the small cylinder 42, and a front and rear axle The airtight gasket 442 is disposed to the end block 441 and is airtightly fitted to the outside of the small cylinder 42. When the one-way intake plug 44 is moved backward relative to the small cylinder 42, the one-way intake plug 44 will hermetically isolate the second space 402 from the outside, when the one-way intake plug 44 is relatively small. When the cylinder 42 is moved forward, the one-way air inlet plug 44 communicates with the second space 402 and the outside world, so that outside air can enter the second space 402. Since the design of the second space 402 and the external end plug structure can be single-passed, it will not be described in detail, and the implementation is not limited to the illustrated embodiment.

Referring to Figures 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 that are opposite in the axial direction. The small cylinder 42 has a through hole 420 that is radially disposed at a rear end portion thereof and passes through the second space 402 and the third space 403. The one-way piston 46 includes a piston body 461 that is fixedly mounted to the front end portion of the communication tube 43, and a gas-tight seal that is disposed outside the piston body 461 and that is airtight against the inner circumferential surface of the small cylinder 42 Washer 465. The piston body 461 has a shaft hole 462 extending axially through the communication tube 43 and the fourth space 404, an outer ring groove 463 recessed on the outer circumferential surface thereof and sleeved by the airtight gasket 465, and two outer ring grooves 463 The communication gap 464 of the outer ring groove 463 and the fourth space 404 extends axially. When the one-way piston 46 moves backward relative to the small cylinder 42, the airtight gasket 465 does not close the communication gap 464, and the one-way piston 46 communicates with the third space 403 and the fourth space 404 when the single The airtight gasket 465 closes a gap between the piston body 461 and the small cylinder 42 when the piston 46 is advanced relative to the small cylinder 42. The one-way piston 46 hermetically separates the third space 403 from the fourth space. 404. Since the one-way piston 46 that can be unidirectionally guided through the third space 403 and the fourth space 404 is of a large number, it is not limited to the above structural aspect.

The first check valve group 47 includes an annular valve seat 471 disposed between the front end of the communication tube 43 and the piston body 461 to communicate the communication tube 43 and the shaft hole 462, and a front and rear displacement A check valve member 472 in the annular valve seat 471. 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 be closed by the positive pressure gas in the fourth space 404, and the airtight space is separated. The communication tube 43 and the fourth space 404, when the gas pressure in the fourth space 404 is less than the gas pressure in the communication tube 43, the first check valve group 47 is subjected to the positive pressure gas in the communication tube 43. The driving is turned on, and the one-way piston 46 is connected to the communication tube 43 and the fourth space 404.

The second check valve block 48 includes an annular valve block 481 fixed in the front end portion of the small cylinder 42 and communicating with the tuyer head 3 and the fourth space 404, and a ring valve block 481 disposed in the annular valve block 481. The check valve member 482. When the gas pressure in the tuyer head 3 is greater than the gas pressure in the fourth space 404, the second check valve group 48 is driven to be closed by the positive pressure gas in the tuyer head 3, and is airtightly separated. The tuyer head 3 and the fourth space 404 are in the fourth space 404 when the gas pressure in the tuyer head 3 is less than the gas pressure in the fourth space 404. The positive pressure gas is driven to open, and the tuyer head 3 and the fourth space 404 are connected.

Since the first check valve group 47 and the second check valve group 48 have a large number of structural types, the check valve groups are not limited to the above-described structural aspects.

Referring to Figures 2, 7, and 8, the adjuster mechanism 5 includes an adjustment base 51 mounted between the large cylinder 41 and the right end of the communication tube 43, and a one-way mounted on the adjustment base 51. Valve 52, an exhaust valve block 53 and a positioning assembly 54. The adjusting seat body 51 has a venting opening 512 extending through the first space 401 and the outside, and a plurality of venting holes 512 spaced apart from each other along the circumference thereof, and extending forwardly and forwardly to communicate with the outside and the first space 401. The air hole 511 has a fitting groove 515 recessed in the rear end surface thereof. The vent 512 has a small aperture section 513 that communicates with the first space 401, and a large aperture section 514 that communicates the small aperture section 513 with the outside.

The check valve 52 has a collar portion 521 that is fixed to the outer circumferential surface of the adjustment base body 51, and a ring-shaped portion that protrudes radially outward from the collar portion 521 and is elastically deformable. An airtight ring portion 522 on the inner circumferential surface of the large cylinder 41. The airtight ring portion 522 can be elastically deformed by the positive pressure gas entering the air inlet holes 511 from the outside, and the outside air can enter the first space 401, but can be used by the positive pressure gas in the first space 401. The air is radially and outwardly abutted against the inner circumferential surface of the large cylinder 41, and the air intake holes 511 and the first space 401 are hermetically separated.

The exhaust valve block 53 includes a spherical closing member 531 which is disposed in the large-aperture section 514 of the exhaust hole 512, and is rotatably disposed on the adjusting base 51. Adjustment member 532. The adjusting member 532 has a connecting wall portion 534 rotatably coaxially disposed on the rear end surface of the adjusting base body 51, and an adjusting ring protruding from the connecting wall portion 534 and surrounding the adjusting seat body 51. a portion 533 and a pressing convex portion 536 protruding from a front side surface of the interlocking wall portion 534. The front side surface of the interlocking wall portion 534 is further recessed with two positioning grooves 535. The adjusting ring portion 533 can be operatively rotated, and the interlocking wall portion 534 is driven to rotate the pressing convex portion 536 relative to the adjusting base body 51, so that the adjusting member 532 can be forwarded by the pressing convex portion 536. Pressing the closure member 531 causes the closure member 531 to close the closed position of the small aperture section 513, and a disengagement position that causes the pressing projection 536 to disengage from the closure member 531.

The positioning assembly 54 has a spherical positioning member 541 which is disposed in the fitting groove 515 in a front-rear direction, and an elastic member 542 disposed in the fitting groove 515. The positioning member 541 is elastically pushed back by the elastic member 542 against the linking wall portion 534, and is detachably inserted into any one of the positioning slots 535, so that the adjusting member 532 can be closed. The position is adjusted between the position and the disengaged position.

When the adjusting seat mechanism 5 is in the pressure releasing state, the adjusting member 532 of the exhaust valve group 53 is turned to the disengaging position. As shown in FIG. 8, the closing member 531 can be from the first space 401. The positive pressure gas is moved backward, and the exhaust gas is externally exhausted 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 to close the small aperture portion 513, so that the first space 401 cannot be Exhaust gas is externally discharged through the exhaust hole 512.

When the air pump 200 of the present invention is used, after the air nozzle head 3 is mounted to the object to be inflated, the user can operate the adjusting member 532 of the exhaust valve group 53 to selectively switch the entire adjusting seat mechanism 5 to the pressure releasing device. Status or the off state. Then, the tuyere 3 is held by one hand, and the large cylinder 41 is held by the other hand, and then the large cylinder 41 is reciprocally pushed back and forth with respect to the tuyere 3 to perform an airing operation.

Referring to FIGS. 3, 4, and 5, during the process of pulling the large cylinder 41 relative to the tuyer head 3 to extend the cylinder mechanism 4, the large cylinder 41 drives the communication tube 43 to synchronize via the adjusting seat mechanism 5. The one-way intake plug 44 and the one-way valve 52 are communicated with respect to the small cylinder 42 to be moved backward, the one-way intake end plug 44 is closed, and the one-way piston 46 is opened. The fourth space 404 and the third space 403 are connected. During this process, the first space 401 will gradually become larger and the second space 402 will gradually become smaller, the third space 403 will gradually become smaller and the fourth space 404 will gradually become larger.

The first space 401 which gradually becomes larger generates a negative pressure force for driving the one-way valve 52 to be opened, and the outside air can be sucked into the check valve 52 via the air inlet holes 511, as indicated by an arrow 801. . The second space 402, which is gradually smaller, presses the internal air into the third space 403 which is gradually smaller, and injects the gradually enlarged fourth space 404 via the one-way piston 46, as indicated by the arrow 801. .

At this time, if the gas pressure in the fourth space 404 is less than the gas pressure in the tuyer head 3, the second second check valve group 48 is closed, and the fourth space 404 is pre-pressed to store the gas; If the gas pressure of the fourth space 404 is greater than the gas pressure in the tuyer head 3, the positive pressure gas in the fourth space 404 drives the second check valve group 48 to open, and the second check The valve block 48 directs positive pressure gas into the tuyer head 3 and can be used to inflate the item to be inflated.

When the one-way intake plug 44 is moved back against the two-way piston 45, the cylinder mechanism 4 has reached the maximum tensile limit. Then, the large cylinder 41 is pushed forward relative to the tuyer head 3 to drive the small cylinder 42 back into the large cylinder 41 to shorten the cylinder mechanism 4 until the one-way intake end plug 44 reaches the front limit. It is placed against the wind mouth 3 .

Referring to FIGS. 6 and 7, in the process of compressing the cylinder mechanism 4, the one-way intake end plug 44 is opened, and 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 will gradually shrink, and the second space 402 and the third space 403 will gradually become larger. The second space 402, which is gradually enlarged, draws in outside air through the one-way air intake plug 44 and injects air into the third space 403 which is gradually enlarged, as indicated by the arrow 802. The fourth space 404 gradually reduces the internal air. When the internal gas pressure is greater than the gas pressure in the tuyer head 3, the second check valve group 48 is driven to open, and the positive pressure gas is injected. The tuyere 3 is in the direction of the air flow as indicated by arrow 802.

At the same time, when the adjusting seat mechanism 5 is in the closed state, the exhaust valve group 53 will close the exhaust hole 512, so the first space 401 which is gradually smaller will also press the internal air into the communication. Inside the tube 43, the direction of the air flow is indicated by arrow 803. When the gas pressure in the communication pipe 43 is greater than the gas pressure in the fourth space 404, the positive pressure gas in the communication pipe 43 drives the first check valve member 472 to open, and compresses the air into the fourth space. 404, the direction of the airflow as indicated by arrow 803. That is to say, in the case that the adjusting seat mechanism 5 is in the closed state, the tuyer head 3 simultaneously outputs the air in the fourth space 404 and the first space 401 for inflation.

Referring to FIG. 8, when the adjusting seat mechanism 5 is in the pressure releasing state, the exhaust valve group 53 is opened to no longer close the exhaust hole 512, so when the first space 401 is compressed, the first The positive pressure gas generated by the compression in the space 401 will open the closing member 531 located in the venting opening 512, and will be vented from the venting opening 512 to the outside, as indicated by the arrow 804, so that it is compressed. In the cylinder mechanism 4, only the gas of the fourth space 404 is pressed into the tuyer head 3 to inflate the object to be inflated.

The design of the adjusting seat mechanism 5 can be switched between the closed state and the pressure releasing state. When the adjusting seat mechanism 5 is switched to the closed state, the first space 401 and the fourth space 404 can be compressed. The gas simultaneously inflates the object to be inflated, and is adapted to inflate with a large amount of air when the inside of the object to be inflated is in a medium and low air pressure state, thereby increasing the inflation speed. When the inside of the object to be inflated has been inflated to a certain pressure or more, and the large cylinder 41 is not easily pushed to perform the charging operation, the adjusting seat mechanism 5 can be switched to the pressure releasing state to vent the air in the first space 401. The inflating action is performed only by compressing the air in the fourth space 404, so that the high-pressure inflation of the object to be inflated is more labor-saving and easy to operate.

In summary, through the structural design of the adjusting seat mechanism 5 and the cylinder mechanism 4, the components of the entire pumping cylinder 200 can be significantly reduced, which helps to reduce the manufacturing cost, and the number of components to be finely processed is reduced. It can also relatively reduce the defect rate of products and components, and relatively improve product quality.

In addition, with the design that the adjusting seat mechanism 5 can be switched between the closed state and the pressure releasing state, in the middle and low air pressure inflating stage of the object to be inflated, the adjusting seat mechanism 5 can be selected to be adjusted to the intake air amount. The large closed state can compress a large amount of gas into the object to be inflated during a push-pull process, which can improve the charging efficiency in the low-pressure phase of the object to be inflated. When the object to be inflated has been inflated to a certain high pressure or higher, the adjusting seat mechanism 5 can be switched to the pressure releasing state, so that the compressed gas in the first space 401 can be vented through the vent hole 512, thereby reducing The resistance of the small cylinder 42 into the large cylinder 41 is made more labor-intensive when the object to be inflated is inflated at a high pressure. Therefore, the new type of inflator 200 is indeed a quite convenient and practical innovative design, and can indeed achieve the purpose of the novel.

However, the above is only the embodiment of the present invention. When the scope of the novel implementation cannot be limited thereto, all simple equivalent changes and modifications according to the scope of the patent application and the contents of the patent specification are still This new patent covers the scope.

200‧‧‧Inflator  3‧‧‧Wind mouth  4‧‧‧Cylinder mechanism  401‧‧‧First space  402‧‧‧Second space  403‧‧‧ third space  404‧‧‧fourth space  41‧‧‧large cylinder  42‧‧‧Small cylinder  420‧‧‧through holes  43‧‧‧Connected pipe  430‧‧‧through holes  44‧‧‧One-way intake plug  441‧‧‧End block  442‧‧‧ airtight gasket  45‧‧‧Two-way piston  46‧‧‧One-way piston  461‧‧‧Piston body  462‧‧‧ shaft hole  463‧‧‧ outer ring groove  464‧‧‧connection gap  465‧‧‧ airtight gasket  47‧‧‧First check valve group  471‧‧‧Ring valve seat  472‧‧‧Reversing valve parts  48‧‧‧Second check valve group  481‧‧‧ ring valve block  482‧‧‧Reversing valve parts  5‧‧‧ Adjusting seat mechanism  51‧‧‧ Adjusting seat  511‧‧‧Air intake  512‧‧‧ venting holes  513‧‧‧Small aperture section  514‧‧‧ Large aperture section  515‧‧‧ embedded slot  52‧‧‧check valve  521‧‧‧ Circumference Department  522‧‧‧Airtight ring  53‧‧‧Exhaust valve group  531‧‧‧Closed  532‧‧‧Adjustment  533‧‧‧Adjustment ring  534‧‧‧ linkage wall  535‧‧‧ positioning slot  536‧‧‧Resist the convex part  54‧‧‧ Positioning components  541‧‧‧ positioning parts  542‧‧‧Flexible parts  801‧‧‧ arrow  802‧‧‧ arrow  803‧‧‧ arrow  804‧‧‧ arrow  

Other features and effects of the novel will be apparent from the embodiments of the drawings, in which:  Figure 1 is a perspective view of an embodiment of the present invention;  Figure 2 is an exploded perspective view of the embodiment;  Figure 3 is a side cross-sectional view of the embodiment;  Figure 4 is a side cross-sectional view of the embodiment showing the case when a large cylinder is pulled backward relative to a tuyeres;  Figure 5 is a partial enlarged view of Figure 4;  Figure 6 is a side cross-sectional view of the embodiment, illustrating a state in which the large-cylinder head is moved forward relative to the tuyer head when the adjusting seat mechanism is in a closed state;  Figure 7 is a partial enlarged view of Figure 6; and  Figure 8 is a view similar to Figure 7 illustrating the condition in which the tuyer head is moved forward relative to the tuyere when the regulator mechanism is in a pressure relief state.  

Claims (9)

An inflator that contains:  a wind mouth;  a cylinder mechanism comprising a large cylinder extending forwardly and radially and radially inwardly, a small cylinder connected to the tuyer head with a front end thereof and a connecting tube, and a sleeve fixed to the front end of the large cylinder a one-way air inlet plug outside the small cylinder, a two-way piston fixed to the rear end of the small cylinder and having a plug between the large cylinder and the communication tube, and a communication between the communication tube and the small cylinder a one-way piston that communicates with the front end of the tube and abuts against the small cylinder, a first check valve group disposed between the one-way piston and the communication tube, and a second check valve group that closes the front end of the small cylinder; and  An adjusting seat mechanism is fixed between the large cylinder and the rear end of the connecting pipe, and is switchable between a pressure releasing state and a closing state;  When the cylinder mechanism is extended, a first space of the large cylinder draws outside air through the adjusting seat mechanism, and a second space of the large cylinder squeezes air into a third space of the small cylinder, and passes through the one-way a piston is injected into a fourth space of the small cylinder, and the second check valve group is driven to be driven by the positive pressure gas of the fourth space; when the cylinder mechanism is shortened, the second space is to be inserted through the one-way intake plug The inhaled outside air is injected into the third space, and when the adjusting seat mechanism is in the closed state, the first space presses air into the connecting pipe, and the first check valve group is positively in the connecting pipe The pressurized gas is driven to open, and when the adjusting seat mechanism is in the pressure releasing state, the adjusting seat mechanism vents the positive pressure gas in the first space.   The pump of claim 1, wherein the adjuster mechanism includes an adjustment seat fixed between the large cylinder and an end of the communication tube, and a check valve and a valve mounted on the adjustment seat An exhaust valve block having an intake port and a vent hole communicating with the first space and the outside, the check valve being closably openable by a negative pressure force in the first space An air inlet hole, the exhaust valve group is operatively open to close the air venting hole, and when the adjusting seat mechanism is in the pressure releasing state, the exhaust valve group does not close the venting hole, and the venting hole can be The positive pressure gas in the first space is released to the outside, and when the adjusting seat mechanism is in the closed state, the exhaust valve group closes the exhaust hole. The pump of claim 2, wherein the air inlet hole is recessed on an outer peripheral surface of the adjusting seat, the one-way valve is sleeved on the adjusting seat body, and airtightly separates the first space from The air inlet hole has a ring sleeve portion positioned on a peripheral surface of the outer surface of the adjusting seat, and a gas-tightly elastically deformable protruding portion extending radially outward from the ring sleeve portion and extending forwardly The airtight ring portion that is in contact with the inner circumferential surface of the large cylinder. The pump of claim 2, wherein the venting hole has a small aperture section that communicates with the first space, and a large aperture section that communicates the small aperture section with the outside, the exhaust valve group includes a setting a closing member for closing the small aperture section in the large aperture section, and an adjusting member disposed on the adjusting seat body, wherein the adjusting member is urged against the adjusting member when the adjusting seat mechanism is in the closed state The small aperture section closes the small aperture section. When the adjusting seat mechanism is in the pressure releasing state, the adjusting member is disengaged from the closing member, and the closing member can be pushed by the positive pressure gas in the small aperture section to make the small aperture The segment connects the large aperture segment. The pump of claim 4, wherein the adjusting member has an adjusting ring portion rotatably sleeved outside the adjusting seat, and a pressing convex portion that can be displaced by the adjusting ring portion. The adjusting member is operatively rotatable to be in a disengaged position in which the pressing member is not pushed against the pressing portion, and a pressing portion of the pressing member abuts against the small aperture portion to close the small portion The position of the aperture segment changes between closed positions. The pump of claim 1 , wherein the adjusting mechanism further comprises a positioning component disposed between the adjusting body and the adjusting member, and the adjusting member is rotatably positioned in the closed position and the disengaging position. . The pump of claim 6, wherein the venting hole is extending forward and backward, the closing member is disposed in the large-aperture section in a front-rear displacement, and the adjusting member further has a connecting body in the adjusting ring portion. a peripheral wall portion facing the rear end side of the adjusting seat body, the pressing convex portion protruding from the front side of the connecting wall portion and forcibly abutting against the closing member, the adjusting seat body further having a concave portion a positioning groove disposed at a rear end surface thereof, wherein the front side surface of the linking wall portion is recessed and provided with two positioning grooves, the positioning assembly has a positioning member disposed in the fitting groove forward and backward, and a positioning member is disposed thereon The elastic member in the fitting groove and having the elastic force of pushing the positioning member back against the interlocking wall portion, the positioning member can be elastically pushed back by the elastic member and can be detachably inserted into the card. Any one of the positioning slots is configured such that the adjustment member can be adjusted to be positioned in the disengaged position and the closed position. The pump of claim 1, wherein the one-way piston includes a piston body fixed to a front end portion of the communication tube and having a shaft hole axially communicating the fourth space and the communication tube, and a shaft a hermetic gasket that is sleeved on the piston body and is airtight against the inner circumferential surface of the small cylinder, the piston body has an outer ring groove recessed on an outer circumferential surface thereof and the airtight gasket is sleeved. And a communication gap extending axially connecting the outer ring groove and the fourth space, the airtight gasket does not close the communication gap when the one-way piston moves backward relative to the small cylinder, and the third space communicates with the fourth space When the one-way piston moves forward relative to the small cylinder, the airtight gasket closes the communication gap, and airtightly separates the third space from the fourth space, and the first check valve group has a communication connection An annular valve seat between the tube and the shaft hole, and a check valve member disposed in the annular valve seat and capable of being opened by the positive pressure gas in the communication tube to close the annular valve seat. The pump of claim 1, wherein the second check valve group includes an annular valve block fixed in the front end portion of the small cylinder and communicating the tuyer head and the fourth space, and a The check valve member of the annular valve block can be closed by the positive pressure gas in the fourth space.