Air pressure type vacuum packaging structure

Abstract

The utility model relates to an air pressure type vacuum packaging structure which comprises a bottle body, one end of the bottle body forms a liquid outlet end, and the other end of the bottle body forms a pressing end. A liquid outlet is formed in the liquid outlet end, and a first one-way valve is arranged at the liquid outlet; a first piston is connected into the bottle body in a sliding and sealing mode, a material cavity is defined between the first piston and the liquid outlet end, and a pressing assembly is connected to the pressing end; the pressing assembly comprises a button and a second piston, the second piston is connected to the inner circumference of the pressing end in a sliding and sealing mode, and an air cavity is formed between the first piston and the second piston; the button is connected with the second piston, the second piston is provided with a vent hole communicated with the air cavity, the vent hole is provided with a second one-way valve, and the button is provided with an air inlet communicated with the outside. The fluid vacuum packaging device can achieve vacuum packaging of fluid, is beneficial to maintaining the using effect of materials in the material cavity, can rapidly take the fluid materials in the material cavity by pressing the button, and is easy and convenient to operate.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging structures, in particular to an air pressure type vacuum packaging structure. Background Art

[0002] When skin care products are used, the outside air will enter the skin care product packaging. The skin care products in the packaging are in contact with the air for a long time, which will cause the skin care products to oxidize and affect the use effect of the skin care products. Therefore, it is necessary to design a vacuum packaging structure suitable for the packaging and use of fluids. Summary of the invention

[0003] In view of the defects in the prior art, the technical problem to be solved by the utility model is to provide an air pressure vacuum packaging structure for realizing vacuum packaging of fluids and facilitating the taking of the fluids.

[0004] In order to solve the above technical problems, the utility model provides a pneumatic vacuum packaging structure, including a bottle body, one end of the bottle body forms a liquid outlet end, and the other end forms a pressing end; the liquid outlet end is provided with a liquid outlet, and a first one-way valve is provided at the liquid outlet, and the first one-way valve allows the material cavity to be unidirectionally conducted to the outside; a first piston is slidably and sealedly connected inside the bottle body, and a material cavity is enclosed between the first piston and the liquid outlet end, and a pressing assembly is connected at the pressing end; the pressing assembly includes a button and a second piston, the second piston is slidably and sealedly connected to the inner periphery of the pressing end, and the first piston is located between the second piston and the liquid outlet end, and the first piston and the first piston are connected to the first An air cavity is formed between the two pistons; the button is connected to the second piston, and the second piston is provided with an air vent connected to the air cavity, a second one-way valve is provided at the air vent, and an air inlet connected to the outside is provided on the button; the button can move from an initial position to an end position under the action of an external force, and the pressing assembly also includes a reset member that can drive the button to return to its initial position, and during the movement of the button from its initial position to its end position, the second one-way valve seals the air vent, and during the reset of the button from its end position to its initial position, the second one-way valve allows external air to flow unidirectionally from the air inlet to the air cavity.

[0005] Preferably, the first one-way valve and the second one-way valve both include an integrally formed sealing sheet, a plug and a clamping portion, the plug is connected between the clamping portion and the sealing sheet, and the diameter of the plug is smaller than the diameters of the clamping portion and the sealing sheet; the sealing sheet of the first one-way valve is located on a side away from the material cavity, and the sealing sheet of the second one-way valve is located on a side close to the air cavity.

[0006] Preferably, the liquid outlet and the air vent both include a sealing groove and a conducting port which are interconnected, the diameter of the sealing groove is larger than the diameter of the conducting port, the sealing sheet is accommodated in the sealing groove, and the mating surfaces of the sealing sheet and the sealing groove are sealed and fitted; the diameter of the clamping portion is larger than the diameter of the conducting port, the plug post is inserted into the conducting port, and a plurality of support rods are protruding from the inner periphery of the conducting port, and the support rods abut against the outer wall of the plug post.

[0007] Preferably, a sleeve is protruding from the middle of the button, and the sleeve is connected to the second piston; the interior of the sleeve is hollow to form an air guide cavity, which is connected to the conducting port of the vent hole, and the air inlet is arranged on the side of the sleeve.

[0008] Preferably, the reset member comprises a plurality of elastic spiral rods uniformly distributed on the circumference of the bottom of the button, and the bottoms of the plurality of elastic spiral rods are connected to the same retaining ring.

[0009] Preferably, the pressing end is reduced in diameter to form a connecting tube, and the second piston is sealingly and slidingly matched with the connecting tube; the pressing assembly also includes a base and a first inner cover body connected to the upper part of the outer periphery of the base; the base has an annular bottom plate, the inner circumference of the annular bottom plate is larger than the outer circumference of the connecting tube, the reset member is accommodated in the base, and the retaining ring abuts against the annular bottom plate; the first inner cover body is sleeved on the outer periphery of the button, the inner edge of the first inner cover body protrudes from the inner side wall of the base, and a limiting member is provided on the outer protrusion of the button, and the limiting member cooperates with the lower inner edge of the first inner cover body to limit the initial position of the button.

[0010] Preferably, a connecting sleeve is provided at the pressing end of the bottle body, and the connecting sleeve is coaxially arranged on the outer periphery of the connecting tube, and an accommodating cavity is enclosed between the connecting sleeve and the connecting tube, and the base is arranged in the accommodating cavity; a top-closed connecting channel is formed between the outer periphery of the base and the inner periphery of the first inner cover body, and the connecting sleeve is inserted into the connecting channel and snap-fitted with the first inner cover body.

[0011] Preferably, the pressing assembly also includes a first outer cover body and an outer cover body connected to each other, the first outer cover body is sleeved on the outer periphery of the first inner cover body, and the outer cover body is sleeved on the outer periphery of the bottle body; the top of the outer cover body abuts against the bottom of the first inner cover body; the top of the first outer cover body is recessed downward to form a groove, the bottom of the groove abuts against the top of the first inner cover body, and a through hole for the button to extend out is provided at the bottom of the groove.

[0012] Preferably, a notch communicating with the groove is provided on one side of the top of the first outer cover body, and the top of the first outer cover body is higher than the top of the button.

[0013] Preferably, the liquid outlet end of the bottle body is connected to a bottle plug, the bottle plug is provided with the liquid outlet, and the end face of the bottle plug away from the material chamber is a concave arc surface; the liquid outlet end of the bottle body is detachably connected to a bottle cap assembly, and the bottle cap assembly is provided with a sealing portion that tightly abuts against the sealing sheet of the first one-way valve.

[0014] The utility model has the following beneficial effects: the pneumatic vacuum packaging structure of the utility model is used for packaging fluid, and the fluid material is filled in the material cavity, and the first piston and the first one-way valve are respectively arranged at the two ends of the material cavity, so as to realize the vacuum packaging of the material in the material cavity, wherein the first one-way valve can conduct the material cavity from the inside to the outside in a one-way manner to realize the discharge of the material, and can prevent the outside air or impurities from entering the material cavity through the first one-way valve. When in use, the user presses the button, and the button drives the second piston to slide in the direction of the first piston. During the movement of the button from its initial position to its terminal position, the air in the air cavity between the first piston and the second piston is compressed, and the air pressure increases. Under the action of the pressure, the first piston slides toward the liquid outlet end, thereby squeezing the material in the material cavity. The material in the material cavity is discharged from the first one-way valve under the action of the pressure, which is convenient for the user to take, and the discharge amount of the material can be controlled by the pressing amount and the number of pressing times of the button. When the user releases the button, the button is reset to its initial position under the action of the reset member. During this process, the button drives the second piston to slide away from the first piston, so that negative pressure is generated in the air cavity. Under the action of the negative pressure, the outside air can enter the air cavity through the air inlet on the button and the second one-way valve to balance the pressure in the air cavity and prevent the first piston from sliding toward the second piston under the action of the negative pressure. It can be seen that the utility model can realize vacuum packaging of fluids, which is conducive to maintaining the use effect of the materials in the material cavity, and the fluid materials in the material cavity can be quickly taken out by pressing the button, which is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the specific implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the specific implementation or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0016] Figure 1 It is a structural schematic diagram of the air pressure vacuum packaging structure of an embodiment of the utility model;

[0017] Figure 2 A top view of the air pressure vacuum packaging structure implemented in the utility model;

[0018] Figure 3 for Figure 2 AA section view in;

[0019] Figure 4 for Figure 2 BB section view in;

[0020] Figure 5 This is a schematic diagram of the structure of the pressing assembly of an embodiment of the utility model;

[0021] Figure 6 for Figure 5 A partial enlarged view of

[0022] Figure 7 This is a schematic diagram of the connection structure of the bottle body and the bottle cap assembly of the embodiment of the utility model;

[0023] Figure 8 This is a schematic diagram of the structure of the pressing member of an embodiment of the utility model;

[0024] Fig. 9 This is a schematic diagram of the structure of the second piston in an embodiment of the utility model;

[0025] Fig.10 It is a schematic structural diagram of a bottle cap assembly according to an embodiment of the utility model.

[0026] Reference numerals:

[0027] 1-bottle body; 11-material chamber; 12-bottle stopper; 13-first one-way valve; 14-first piston; 15-connecting pipe; 16-connecting sleeve; 17-accommodating chamber;

[0028] 2-pressing assembly; 21-pressing member; 211-button; 2111-sleeve; 2112-air inlet; 2113-limiting member; 212-reset member; 2121-elastic spiral rod; 2122-blocking ring; 22-second piston; 221-sealing groove; 222-conducting port; 223-support rod; 23-air cavity; 24-second one-way valve; 241-sealing sheet; 2411-sealing ring; 242-insertion column; 243-clamping part; 25-base; 251-annular bottom plate; 26-first inner cover; 27-connecting channel; 28-first outer cover; 281-groove; 282-notch; 29-outer cover;

[0029] 3-bottle cap assembly; 31-second outer cover body; 32-second inner cover body; 321-sealing part. DETAILED DESCRIPTION

[0030] Here, it should be noted that the functions and methods involved in the present invention are merely conventional adaptive applications of the prior art. Therefore, the improvement of the present invention on the prior art is essentially the connection relationship between the hardware, rather than the functions and methods themselves. That is, although the present invention involves some functions and methods, it does not include improvements to the functions and methods themselves. The description of the functions and methods in the present invention is to better illustrate the present invention so as to better understand the present invention.

[0031] The following embodiments of the technical solution of the utility model are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the protection scope of the utility model.

[0032] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by technicians in the field to which the utility model belongs.

[0033] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 and Fig.10 As shown, this embodiment provides an air pressure vacuum packaging structure, including a bottle body 1, a pressing assembly 2 and a bottle cap assembly 3. The bottle body 1 and the bottle cap assembly 3 are assembled and connected to form an inner bottle body assembly. During transportation, the inner bottle body assembly and the pressing assembly 2 can be transported separately, and the fluid material is filled in the bottle body 1. When the material is used up, only the inner bottle body assembly can be replaced, which is beneficial to environmental protection and can reduce the cost of use.

[0034] The bottle body 1 is hollow inside to form a material cavity 11. One end of the bottle body 1 forms a liquid outlet, and the other end forms a pressing end. The liquid outlet is used to connect with the bottle cap assembly 3, and the pressing end is used to connect with the pressing assembly 2. A bottle plug 12 is clamped at the liquid outlet. The bottle plug 12 is provided with a liquid outlet, and the end surface of the bottle plug 12 away from the material cavity 11 is a concave arc surface. A first one-way valve 13 is provided at the liquid outlet, and the first one-way valve 13 can make the material cavity 11 unidirectionally conductive to the outside. A first piston 14 is slidably and sealably connected inside the bottle body 1, and the first piston 14 and the liquid outlet are enclosed and defined to form the material cavity 11.

[0035] The pressing end of the bottle body 1 is connected to the pressing assembly 2. Specifically, the pressing end of the bottle body 1 is reduced in diameter to form a connecting tube 15, and a connecting sleeve 16 is provided at the pressing end of the bottle body 1. The connecting sleeve 16 is coaxially arranged on the outer periphery of the connecting tube 15, and a receiving cavity 17 is enclosed between the connecting sleeve 16 and the connecting tube 15.

[0036] The above-mentioned pressing assembly 2 includes a pressing member 21 and a second piston 22. Among them, the second piston 22 is slidably and sealingly connected to the inner circumference of the connecting tube 15, the above-mentioned first piston 14 is located between the second piston 22 and the bottle stopper 12, and an air cavity 23 is formed between the first piston 14 and the second piston 22. The above-mentioned pressing member 21 includes a button 211 and a reset member 212 integrally formed by plastic. Specifically, the reset member 212 includes three elastic spiral rods 2121 circumferentially evenly distributed at the bottom of the button 211, and the bottoms of the three elastic spiral rods 2121 are connected to the same retaining ring 2122. In this embodiment, the pressing member 21 includes two parts, a button 211 and a reset member 212, and the elastic spiral rod 2121 can be compressed and deformed and store energy when under pressure, and recover after the external force disappears, similar to the effect of a spring. In this embodiment, three elastic spiral rods 2121 are provided. In practice, they can also be designed as two, four, etc. as needed.

[0037] A sleeve 2111 is protrudingly provided in the middle of the button 211, and the sleeve 2111 is engaged with the second piston 22. In this embodiment, the sleeve 2111 is hollow inside to form an air guide cavity, and an air inlet 2112 communicating with the outside is provided on the side of the sleeve 2111. A vent hole communicating with the air cavity 23 is provided on the second piston 22, a second one-way valve 24 is provided at the vent hole, and the vent hole is communicated with the air guide cavity on the inner periphery of the sleeve 2111.

[0038] In this embodiment, the button 211 can move from an initial position to an end position under the action of an external force (the attached figure of this embodiment only shows the state diagram of the button 211 in the initial position). When the button 211 is pressed and moves from its initial position to its end position, the reset member 212 is compressed to store energy, and the second one-way valve 24 seals the vent hole, so that the air in the air cavity 23 is compressed and the air pressure increases. The first piston 14 slides toward the bottle stopper 12 under the action of this pressure, thereby squeezing the material in the material cavity 11. The material in the material cavity 11 is discharged from the first one-way valve 13 under the action of this pressure, which is convenient for the user to take, and the discharge amount of the material can be controlled by the amount and number of times the button is pressed. When the user releases the button 211, the button 211 is reset to its initial position under the action of the reset member. During this process, the button 211 drives the second piston 22 to slide in the direction away from the first piston 14, so that negative pressure is generated in the air cavity 23. Under the action of the negative pressure, the outside air can enter the air cavity 23 through the air inlet 2112 and the second one-way valve 24 to balance the pressure in the air cavity 23 and prevent the first piston 14 from sliding toward the second piston 22 under the action of the negative pressure.

[0039] Specifically, the second one-way valve 24 comprises a sealing sheet 241, a plug post 242 and a clamping portion 243 integrally formed of a flexible material, the plug post 242 is connected between the clamping portion 243 and the sealing sheet 241, the diameter of the plug post 242 is smaller than the diameter of the clamping portion 243 and the sealing sheet 241, and the sealing sheet 241 is located on a side close to the air cavity 23. In this embodiment, the end surface of the sealing sheet 241 on one side away from the plug post 242 is an outwardly convex arc surface, and a sealing ring 2411 is provided on the outer edge of the sealing sheet 241 protruding toward the plug post 242.

[0040] Specifically, the vent hole of the second piston 22 includes a sealing groove 221 and a conducting port 222 that are interconnected. The diameter of the sealing groove 221 is larger than the diameter of the conducting port 222. The sealing sheet 241 is accommodated in the sealing groove 221, and the sealing ring 2411 on the sealing sheet 241 is sealed and fitted with the bottom of the sealing groove 221. The above-mentioned plug 242 is inserted into the conducting port 222, and the diameter of the clamping portion 243 is larger than the diameter of the conducting port 222, so that the second one-way valve 24 is clamped and connected with the second piston 22.

[0041] In addition, four support rods 223 are protrudingly provided on the inner periphery of the conducting port 222, and the support rods 223 abut against the outer wall of the plug column 242. The design of the support rods 223 can not only support the second one-way valve 24, but also ensure that the conducting port 222 can maintain communication with the air inlet 2112. In this embodiment, the number of the support rods 223 is four, and in practice, it can also be designed to be two, three, etc. according to needs.

[0042] The second one-way valve 24 and the connection structure between the second one-way valve 24 and the second piston 22 are described in detail above. In the present embodiment, the first one-way valve 13 and the second one-way valve 24 have the same structure, and the connection structure between the two and the bottle stopper 12 and the second piston 22 is also the same. Those skilled in the art should be aware that the first one-way valve 13 also includes a sealing plate, a plug and a clamping portion, but the sealing plate of the first one-way valve 13 is located on the side away from the material chamber 11.

[0043] In this embodiment, when the button 211 drives the second piston 22 to slide in the direction of the first piston 14, the pressure in the air cavity 23 increases. At this time, the sealing sheet 241 of the second one-way valve 24 fits more closely with the sealing groove 221 under the action of the air pressure, effectively preventing the gas in the air cavity 23 from being discharged from the conducting port 222, so as to smoothly push the first piston 14 to move; and when the reset member 212 drives the button 211 to reset, the second piston 22 slides in the direction away from the first piston 14. At this time, negative pressure is formed in the air cavity 23, and the outside air can "push away" the sealing sheet 241 under the action of the negative pressure, so that the sealing sheet 241 is separated from the sealing groove 221, thereby facilitating the outside air to enter the air cavity 23 through the air inlet 2112 and the conducting port 222 to balance the pressure in the air cavity 23. Correspondingly, when the first piston 14 slides toward the stopper 12 under the action of the air pressure of the air chamber 23, the material in the material chamber 11 is squeezed, and the material "pushes open" the sealing sheet of the first one-way valve 13 under the action of the pressure and is discharged from the liquid outlet for easy access.

[0044] Furthermore, the pressing assembly 2 further includes a base 25 and a first inner cover 26 snap-fitted to the upper portion of the outer periphery of the base 25. In this embodiment, the base 25 is disposed in the accommodating cavity 17, and a top-closed connecting passage 27 is formed between the outer periphery of the base 25 and the inner periphery of the first inner cover 26, and the connecting sleeve 16 is inserted into the connecting passage 27 and snap-fitted with the first inner cover 26.

[0045] Specifically, the base 25 has an annular bottom plate 251 whose inner circumference is larger than the outer circumference of the connecting pipe 15. In this embodiment, the reset member 212 is accommodated in the base 25, and the retaining ring 2122 abuts against the top of the annular bottom plate 251.

[0046] The top of the first inner cover 26 is sleeved on the outer periphery of the button 211, and the inner edge of the top of the first inner cover 26 protrudes from the inner side wall of the base 25. An annular stopper 2113 is protrudingly provided on the outer periphery of the bottom of the button 211, and the stopper 2113 cooperates with the lower inner edge of the first inner cover 26 to limit the initial position of the button 211.

[0047] Furthermore, the pressing assembly 2 further comprises a first outer cover 28 and an outer cover 29, the top periphery of the outer cover 29 is snap-fitted with the bottom inner periphery of the first outer cover 28, the first outer cover 28 is sleeved on the periphery of the first inner cover 26, and the outer cover 29 is sleeved on the periphery of the bottle body 1. In this embodiment, the top of the outer cover 29 abuts against the bottom of the first inner cover 26, and the top of the first outer cover 28 is recessed downward to form a groove 281, the bottom of the groove 281 abuts against the top of the first inner cover 26, so that the first inner cover 26 is sandwiched between the first outer cover 28 and the outer cover 29, thereby realizing the assembly of the first outer cover 28, the outer cover 29, the first inner cover 26, the base 25, the pressing member 21 and the second piston 22.

[0048] Furthermore, a through hole for the button 211 to extend out is provided at the bottom of the groove 281, so as to facilitate pressing the button 211. In addition, a notch 282 communicating with the groove 281 is provided on one side of the top of the first outer cover 28, so as to facilitate pressing the button 211. It should be noted that the top of the first outer cover 28 of this embodiment is higher than the top of the button 211 to prevent the button 211 from being accidentally touched during transportation.

[0049] Furthermore, the bottle cap assembly 3 is detachably connected to the liquid outlet end of the bottle body 1. Specifically, the bottle cap assembly 3 includes a second outer cap 31 and a second inner cap 32 clamped inside the second outer cap 31, the second inner cap 32 is threadedly connected to the bottle body 1, and a sealing portion 321 is provided on the second inner cap 32 to tightly abut against the sealing sheet of the first one-way valve 13, and the sealing portion 321 can press the sealing sheet of the first one-way valve 13 onto the bottle plug 12 to prevent the material in the material cavity 11 from leaking.

[0050] During production, the material is filled into the material cavity 11. After the filling is completed, the bottle stopper 12 is pressed onto the liquid outlet end of the bottle body 1, and then the bottle cap assembly 3 and the bottle body 1 are threadedly connected and assembled into one body to form an inner bottle body assembly. The inner bottle body assembly and the pressing assembly 2 can be freely disassembled. During assembly, the connecting sleeve 16 of the bottle body 1 is inserted into the connecting channel 27 of the pressing assembly 2, and the top periphery of the connecting sleeve 16 is clamped with the bottom inner periphery of the first inner cover body 26, so as to realize the assembly of the inner bottle body assembly and the pressing assembly 2. After assembly, the base 25 is inserted into the accommodating cavity 17 and is sleeved on the outer periphery of the connecting tube 15. At the same time, the second piston 24 extends into the connecting tube 15 and is sealed and slidably matched with the connecting tube 15.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the utility model, and they should all be included in the scope of the claims and specification of the utility model.

Claims

1. A pressure type vacuum packaging structure, characterized in that: include: A bottle body, one end of which forms a liquid outlet end, and the other end of which forms a pressing end; The liquid outlet end is provided with a liquid outlet, and a first one-way valve is provided at the liquid outlet, and the first one-way valve allows the material cavity of the bottle body to be unidirectionally connected to the outside; A first piston is slidably and sealably connected inside the bottle body, a material cavity is enclosed between the first piston and the liquid outlet end, and a pressing assembly is connected at the pressing end; The pressing assembly comprises a button and a second piston, the second piston is slidably and sealingly connected to the inner periphery of the pressing end, and the first piston is located between the second piston and the liquid outlet end, and an air cavity is formed between the first piston and the second piston; The button is connected to the second piston, the second piston is provided with a vent hole communicating with the air cavity, the vent hole is provided with a second one-way valve, and the button is provided with an air inlet communicating with the outside; The button can move from an initial position to an end position under the action of an external force, and the pressing assembly also includes a reset member that can drive the button to return to its initial position. During the movement of the button from its initial position to its end position, the second one-way valve seals the vent hole. During the reset of the button from its end position to its initial position, the second one-way valve allows external air to flow unidirectionally from the air inlet to the air cavity.

2. The air pressure vacuum packaging structure according to claim 1, characterized in that: The first one-way valve and the second one-way valve each include an integrally formed sealing sheet, a plug post and a clamping portion, the plug post is connected between the clamping portion and the sealing sheet, and the diameter of the plug post is smaller than the diameter of the clamping portion and the sealing sheet; The sealing sheet of the first one-way valve is located at a side away from the material cavity, and the sealing sheet of the second one-way valve is located at a side close to the air cavity.

3. The air pressure vacuum packaging structure according to claim 2, characterized in that: The liquid outlet and the vent hole both include a sealing groove and a conducting port that are interconnected, the diameter of the sealing groove is larger than the diameter of the conducting port, the sealing sheet is accommodated in the sealing groove, and the sealing sheet and the sealing groove are sealed and fitted at the butt joint surface; The diameter of the clamping portion is larger than the diameter of the conducting port, the plug post is inserted into the conducting port, and a plurality of support rods are protrudingly provided on the inner periphery of the conducting port, and the support rods abut against the outer wall of the plug post.

4. The air pressure vacuum packaging structure according to claim 3, characterized in that: A sleeve is protrudingly provided at the middle of the button, and the sleeve is connected to the second piston; The interior of the sleeve is hollow to form an air guide cavity, which is communicated with the guide port of the vent hole, and the air inlet is arranged on the side of the sleeve.

5. The air pressure vacuum packaging structure according to claim 1, characterized in that: The reset member comprises a plurality of elastic spiral rods uniformly distributed on the circumference of the bottom of the button, and the bottoms of the plurality of elastic spiral rods are connected to the same retaining ring.

6. The air pressure vacuum packaging structure according to claim 5, characterized in that: The pressing end is reduced in diameter to form a connecting tube, and the second piston is in sealing and sliding cooperation with the connecting tube; The pressing assembly also includes a base and a first inner cover connected to the upper portion of the outer periphery of the base; The base has an annular bottom plate, the inner circumference of which is larger than the outer circumference of the connecting pipe, the reset member is accommodated in the base, and the retaining ring abuts against the annular bottom plate; The first inner cover body is sleeved on the outer circumference of the button, the inner edge of the first inner cover body protrudes from the inner side wall of the base, and a limiting member is provided on the outer protrusion of the button, which cooperates with the lower inner edge of the first inner cover body to limit the initial position of the button.

7. The air pressure vacuum packaging structure according to claim 6, characterized in that: A connecting sleeve is provided at the pressing end of the bottle body, and the connecting sleeve is coaxially arranged on the outer periphery of the connecting tube. An accommodating cavity is enclosed between the connecting sleeve and the connecting tube, and the base is arranged in the accommodating cavity; A top-closed connecting channel is formed between the outer periphery of the base and the inner periphery of the first inner cover body, and the connecting sleeve is inserted into the connecting channel and snap-fitted with the first inner cover body.

8. The air pressure vacuum packaging structure according to claim 7, characterized in that: The pressing assembly further comprises a first outer cover body and an outer cover body connected to each other, wherein the first outer cover body is sleeved on the outer periphery of the first inner cover body, and the outer cover body is sleeved on the outer periphery of the bottle body; The top of the outer cover body abuts against the bottom of the first inner cover body; The top of the first outer cover body is sunken downward to form a groove, the bottom of the groove abuts against the top of the first inner cover body, and a through hole for the button to extend out is arranged at the bottom of the groove.

9. The air pressure vacuum packaging structure according to claim 8, characterized in that: A notch communicating with the groove is disposed on one side of the top of the first outer cover, and the top of the first outer cover is higher than the top of the button.

10. The air pressure vacuum packaging structure according to claim 2, characterized in that: The liquid outlet end of the bottle body is connected to a bottle plug, the bottle plug is provided with the liquid outlet, and the end surface of the bottle plug away from the material cavity is a concave arc surface; The liquid outlet end of the bottle body is detachably connected to a bottle cap assembly, and the bottle cap assembly is provided with a sealing portion that is tightly in contact with the sealing sheet of the first one-way valve.

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