CN217893568U

CN217893568U - Reduced height and liquid-tight precompression pump and container having same

Info

Publication number: CN217893568U
Application number: CN202222142035.1U
Authority: CN
Inventors: 成飞; 康卫东
Original assignee: Shenzhen Sanyuan Pharmaceutical Packaging Co ltd
Current assignee: Shenzhen Sanyuan Pharmaceutical Packaging Co ltd
Priority date: 2022-08-15
Filing date: 2022-08-15
Publication date: 2022-11-25
Anticipated expiration: 2032-08-15

Abstract

The utility model discloses a reduce height and prevention of seepage liquid's precompression pump and have the container of this pump, the precompression pump includes: the water storage device comprises a body, a first piston assembly movably arranged in the body, a pressing head assembly arranged at the top of the first piston assembly, a second piston movably arranged in the first piston assembly and a second spring supported between the second piston and the first piston assembly, wherein a water storage bin is arranged between the body and the first piston assembly, a water outlet channel is arranged in the first piston assembly and communicated with the water storage bin and a nozzle of the pressing head assembly, and the second piston is provided with a thimble part used for sealing the water outlet channel. The utility model discloses an add parts such as second piston and second spring in first piston assembly's inside, realize that spraying effect of precompression pump is better, and whole height is shorter.

Description

Reduced height and liquid-tight precompression pump and container with such a pump

Technical Field

The utility model relates to a precompression pump technical field especially relates to reduce height and prevent leaking the precompression pump of liquid and have the container of this pump.

Background

Precompression pumps are commonly mounted on containers for spraying various types of liquids stored in the containers, such as: perfumes, medical products, cosmetics, cleaning products, and the like. Generally, a precompression pump is a device in which outward ejection of liquid occurs only when the liquid is subjected to a certain minimum pressure in the water reservoir, in such a way as to ensure that the liquid exhibits a better spray when ejected at a higher pressure.

Various types of pre-compression pumps have been proposed in the prior art, such as application No. 202022571129.1, which has a water storage chamber between a piston and a body, wherein the piston presses the water storage chamber during moving downward along with a main column, the pressure in the water storage chamber increases, when the pressure increases to exceed the force of a preset spring on the piston, the piston is lifted upward, at this time, a sealing portion separates from an open large cap, a passage is opened, and liquid enters the passage and moves upward until being ejected from a nozzle.

Therefore, how to design a precompression pump and a container for effectively improving the spraying effect is an urgent technical problem to be solved in the industry.

SUMMERY OF THE UTILITY MODEL

In order to solve the above-mentioned defect that prior art exists, the utility model provides a reduce the precompression pump of height and prevention of seepage liquid and have the container of this pump, through addding parts such as second piston and second spring in first piston assembly's inside, realize that the effect of spraying of precompression pump is better, and whole height is shorter.

The utility model discloses a technical scheme be, the design reduces highly just prevention of seepage liquid's precompression pump, include: the water storage device comprises a body, a first piston assembly movably arranged in the body, a pressing head assembly arranged at the top of the first piston assembly, a second piston movably arranged in the first piston assembly and a second spring supported between the second piston and the first piston assembly, wherein a water storage bin is arranged between the body and the first piston assembly, a water outlet channel is arranged in the first piston assembly and communicated with the water storage bin and a nozzle of the pressing head assembly, and the second piston is provided with a thimble part used for sealing the water outlet channel.

Preferably, the first piston assembly comprises: the water storage device comprises a first piston movably arranged in a body, a spring retainer arranged in the first piston and a first spring supported between the body and the spring retainer, wherein a space between the first piston and the body forms a water storage bin, and the water storage bin is designed in the first piston so as to reduce the overall height of the pre-compression pump to the maximum extent. The second piston is movably arranged in the spring retainer, the second spring is supported between the spring retainer and the second piston, a variable pressure cabin is formed by the space between the upper part of the second piston and the first piston, and the variable pressure cabin is communicated with the water storage cabin. When the first piston generates displacement and the water storage bin is stressed, the second piston can generate larger displacement in the variable pressure bin with smaller diameter, and the liquid seepage process is avoided by the pre-compression pump, so that liquid is directly sprayed with better performance.

Preferably, a space between the lower side of the second piston and the spring holder forms a compression chamber, the second piston is provided with an inner elastic flared portion expanding outward, and an outer edge of the inner elastic flared portion contacts with an inner wall of the spring holder to seal the compression chamber.

Preferably, the side wall of the body is provided with an exhaust hole, the outer edge of the bottom of the first piston is expanded outwards to form a lower elastic outwards-expanding part for sealing the water storage bin, an exhaust adjusting convex strip located below the lower elastic outwards-expanding part is arranged inside the body, and the lower elastic outwards-expanding part deforms when moving downwards to touch the exhaust adjusting convex strip so as to allow air inside the water storage bin to be discharged outwards.

Preferably, the top of body is uncovered, and uncovered fixed mounting has the neck piece, and the neck piece is equipped with the centre bore of cover on first piston, and first piston is equipped with the size from last to the toper section that increases gradually down, and the centre bore forms the line with the contact of toper section and seals, ensures that the liquid in the container can not take place to leak under the circumstances of vibration and certain negative pressure.

Preferably, the outer edge of the top of the first piston is expanded outwards to form an upper elastic outwards-expanding part, the outer edge of the upper elastic outwards-expanding part is in contact sealing with the inner wall of the body, an air inlet groove is formed in the top of the body, the upper elastic outwards-expanding part can move downwards along with the first piston to the air inlet groove, so that gas in the external environment can flow to the position between the upper elastic outwards-expanding part and the lower elastic outwards-expanding part through the air inlet groove and then enters the container through the exhaust hole of the body, the pressure in the container is kept consistent with the external environment, and the continuous use function of the pump body can be guaranteed.

Preferably, the water outlet channel is arranged in the first piston and located above the second piston, the ejector pin portion is arranged at the top of the second piston, at least one step is arranged at one end, close to the second piston, of the water outlet channel, the size of the ejector pin portion is gradually increased from top to bottom, the edge of each step is in contact with the ejector pin portion to form line sealing, and liquid seepage is prevented when the pressure of the pump body is not in place.

Preferably, the body has the water inlet channel who communicates with the storage water bin, and the check valve ball has been placed on water inlet channel's top, the bottom is connected with the straw, and the periphery of check valve ball is surrounded by three at least spacing muscle that the interval set up, and the check valve ball is movable from top to bottom in the space that spacing muscle encloses, and the clearance between the spacing muscle can let the more smooth and easy entering of liquid in the container store up the water bin.

The utility model discloses the container has still been provided, include: a bottle body, the bottle body being mounted with the above-mentioned pre-compression pump.

Preferably, the bottle is equipped with the bayonet socket, and the body is installed inside the bayonet socket, and the top fixed mounting of body has the collar piece, and the outer lane cladding of bayonet socket has the fixed cover of fixing collar piece clamp on the bayonet socket, prevents that the precompression pump from droing and becoming flexible from the bottle.

Compared with the prior art, the utility model discloses at first piston assembly internally mounted second piston and second spring, design vary voltage storehouse between first piston assembly and second piston, when the pressure of depositing the storehouse does not reach specific numerical value, the thimble portion of second piston seals out the water passageway, when the pressure that receives up to the second piston reaches the pre-pressure that can overcome the second spring, the second piston downstream, open the passageway with a great displacement, the pressure that liquid outwards was pumped is big, effectively optimize and spray the effect. Furthermore, the variable pressure cabin is arranged inside the first piston, so that the height can be reduced to the maximum extent.

Drawings

The invention is explained in more detail below with reference to exemplary embodiments and the accompanying drawings, in which:

fig. 1 is a schematic view of the structure of a precompression pump of the present invention;

fig. 2 is a schematic exploded view of the precompression pump of the present invention;

FIG. 3 is a schematic view of the overall structure of the precompression pump of the present invention mounted on a bottle body;

FIG. 4 is a schematic longitudinal sectional view of the pre-compression pump exhausting air;

FIG. 5 is a schematic longitudinal sectional view of the precompression pump of the present invention sucking in liquid;

FIG. 6 is a schematic longitudinal sectional view of the precompression pump spray of the present invention in use;

reference numerals: 1. a spring retainer; 2. a second piston; 3. a thimble portion; 4. a collar piece; 5. a second spring; 6. a body; 7. a first piston; 8. a first spring; 9. a check valve ball; 10. a water storage bin; 11. fixing a sleeve; 12. a lower elastic flare; 13. an upper elastic flaring portion; 14. transforming the pressure in a bin; 15. an inner elastic flared portion; 16. a water outlet channel; 17. an exhaust regulating convex strip; 18. an exhaust hole; 19. pressing the head; 20. a head cap; 21. a straw; 22. a nozzle; 23. a gap; 24. a bottle body; 25. an air inlet groove; 100. a container.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the present patent and are not limiting upon the present patent.

The utility model provides a precompression pump is applicable to and installs on depositing the container of liquid, comes and outwards blowout through pressing down the liquid absorption that the precompression pump can be in with the container. Specifically, as shown in fig. 1, the precompression pump includes a body 6, a first piston assembly mounted inside the body 6, a head assembly mounted on the top of the first piston assembly, a second piston 2, and a second spring 5. A water storage bin 10 is arranged between the first piston component and the body 6,

the first piston assembly is internally provided with a water outlet channel 16, the water outlet channel 16 is communicated with the water storage bin 10 and a nozzle 22 of the pressing head assembly, and liquid in the water storage bin 10 can be sprayed out of the nozzle 22 through the water outlet channel 16. The second piston 2 is arranged in the first piston assembly, the second spring 5 is supported between the second piston 2 and the first piston assembly, the top of the second piston 2 is provided with a thimble portion 3, the second piston 2 is supported by the elasticity of the second spring 5, the thimble portion 3 is propped against the bottom of the water outlet channel 16 to seal the thimble portion, when the pressure applied to the second piston 2 reaches the pressure capable of overcoming the pre-pressure of the second spring 5, the second piston 2 moves downwards, and the thimble portion 3 is separated from the water outlet channel 16 to be communicated. The utility model discloses a first piston assembly, second piston 2 and second spring 5 constitute a whole height jointly shorter, and spray the better pre-compaction piston assembly of effect.

For better understanding of the pre-compression pump of the present invention, the following detailed description of the structure of each part of the pre-compression pump is provided in connection with the embodiments.

As shown in fig. 1, the first piston assembly includes a first piston 7, a first spring 8 and a spring retainer 1, the first piston 7 is hollow and installed in the body 6, a water storage bin 10 is defined between an inner cavity of the first piston 7 and the body 6, a volume of the water storage bin 10 changes with an up-and-down movement of the first piston 7, the spring retainer 1 is fixedly installed in the first piston 7 just below the water outlet channel 16, the first spring 8 is supported between the body 6 and the spring retainer 1, the first spring 8 provides an upward supporting force to the spring retainer 1, which is equivalent to that the spring retainer 1 and the first spring 8 are both located in the water storage bin 10, and a space allowing liquid to pass is provided between the spring retainer 1 and an inner wall of the first piston 7.

The spring retainer 1 is provided with an accommodating cavity with an opening facing, the second piston 2 is movably arranged in the accommodating cavity of the spring retainer 1, a space between the upper part of the second piston 2 and the first piston 7 forms a pressure-variable cabin 14, the volume of the pressure-variable cabin 14 changes along with the up-down movement of the second piston 2, the pressure-variable cabin 14 is communicated with the water storage cabin 10, namely, liquid in the water storage cabin 10 can enter the pressure-variable cabin 14 above the second piston 2 through the space between the spring retainer 1 and the first piston 7.

The top outer edge of the second piston 2 slightly expands outwards to form an inner elastic expansion part 15, the inner elastic expansion part 15 is attached and contacted with the accommodating cavity of the spring retainer 1, a compression bin is formed in the space between the lower part of the second piston 2 and the spring retainer 1, the compression bin and the pressure changing bin 14 are isolated through the inner elastic expansion part 15, and the second spring 5 is positioned in the compression bin and supported between the second piston 2 and the spring retainer 1. When the pressure of the variable pressure cabin 14 is increased, the second piston 2 moves downwards against the pre-pressure of the second spring 5, the air in the compression cabin and the second spring 5 are both compressed, the water outlet channel 16 is communicated, when the pressure of the variable pressure cabin 14 is reduced, the second piston 2 is pushed upwards together under the action of the compressed air and the second spring 5, and the water outlet channel 16 is closed. By designing the pressure changing cabin 14, the second piston 2 and the second spring 5 in the first piston assembly to form a new pre-compression piston assembly, the pre-compression piston assembly occupies less space compared with the conventional pre-compression pump, so that the overall height of the pre-compression pump is reduced to the maximum extent, and the structure of the pre-compression pump is more compact.

Traditional precompression pump is expected to reach and sprays the effect, and when only having deposit the liquid in the sump and reaching specific minimum pressure, liquid began outwards to spout, but this moment because pressure is littleer, and the liquid that sprays is linear or sprays with the mode of sepage, and when only reaching bigger pressing force, liquid just can present better spraying, and the effect of spraying is very big depends on user's the degree of pressure, and use experience is not good.

The utility model provides a liquid seepage problem can effectively be avoided to the precompression pump, and its theory of operation as follows: in order to achieve a certain minimum pressure, i.e. the pre-pressure of the second spring 5, to which the second piston 2 is subjected in the pressure-changing chamber 14, the press head assembly needs to provide a greater pressure, and a greater displacement distance of the second piston 2 is generated. The transverse area of the first piston 7 contacting the liquid is S ₁ The lateral area of the second piston 2 contacting the liquid is S ₂ The first piston 7 has a movement distance H ₁ The second piston 2 has a distance H ₂ A specific minimum pressure of F _{Preparation of} According to the pressure F that the head assembly needs to provide _{Press and press} Comprises the following steps:

distance H of movement of the second piston ₂ Is composed of

Can ensure like this that liquid can not spray when less pressure, when the pressing force reaches bigger, a great passageway is opened rapidly to second piston 2, and the weeping process has been avoided to the precompression pump, directly sprays liquid with better performance, and the use of very big optimization precompression pump is experienced.

As shown in fig. 1 and 2, the button assembly includes a nozzle 22, a button 19, and a cap 20, the button 19 is mounted on the top of the first piston 7, the cap 20 covers the button 19, the nozzle 22 is inserted into the button 19 from a side hole of the cap 20, an inner end of the nozzle 22 communicates with the water outlet passage 16 through the button 19, and an outer end of the nozzle 22 is flush with an outer wall of the side hole of the cap 20 to maintain an aesthetic appearance of the button assembly. The top of first piston 7 is equipped with outlet channel 16 to outlet channel 16 is located the top of second piston 2, thimble portion 3 can move up to sealed outlet channel 16 or move down to opening outlet channel 16 along with second piston 2, outlet channel 16 is close to the bottom of second piston 2 and is equipped with at least one stage of step, the size of thimble portion 3 increases from top to bottom gradually, the edge of each stage of step all forms line seal with thimble portion 3 contact, the edge of step here refers to the convex corner position of step to outlet channel 16.

The utility model discloses an in some embodiments, the bottom of exhalant canal 16 is equipped with the two-stage step, exhalant canal 16's edge is equipped with the chamfer and forms first order step, the edge of first order step is equipped with the recess of round undercut and forms the second level step, the edge of first order step and second level step all forms the line seal with 3 contacts of thimble portion, the double-line seal can effectively prevent to deposit the liquid in sump 10 and outwards ooze, produce the phenomenon of weeping when effectively solving the less pressure of the pump body.

The bottom of body 6 is equipped with inhalant canal, and inhalant canal's top is arranged in depositing sump 10 and rather than the intercommunication, and check valve ball 9 has been placed on inhalant canal's top, the bottom is connected with straw 21, and the periphery of check valve ball 9 is surrounded by three at least spacing muscle that the interval set up, and check valve ball 9 moves about in the space that spacing muscle encloses, and the clearance between the spacing muscle can let the more smooth and easy entering of liquid in the container 100 deposit sump 10.

As shown in fig. 3 and 4, the side wall of the body 6 is provided with an air vent 18, the outer edge of the bottom of the first piston 7 is expanded outward to form a lower elastic expansion portion 12, the lower elastic expansion portion 12 is in contact with the inner wall of the body 6 to seal the water storage chamber 10 between the first piston 7 and the body 6, an air discharge adjusting protrusion 17 is arranged inside the body 6, the air discharge adjusting protrusion 17 is positioned below the lower elastic expansion portion 12, when the first piston 7 moves downward until the lower elastic expansion portion 12 is in contact with the air discharge adjusting protrusion 17, the lower elastic expansion portion 12 is deformed, and the air in the water storage chamber 10 overflows from the gap between the lower elastic expansion portion 12 and the air discharge adjusting protrusion 17 and enters the container 100 from the air vent 18. The precompression pump can obtain different spraying amounts by adjusting the length of the exhaust regulating rib 17 of the body 6, when the length of the exhaust regulating rib 17 is increased, the contact position of the first piston 7 and the exhaust regulating rib 17 moves upwards, the distance for keeping the water storage bin 10 sealed is shortened, and the amount of liquid pumped out is correspondingly reduced.

The top of body 6 is uncovered, and uncovered fixed mounting has collar 4, and collar 4 is equipped with the centre bore of cover on first piston 7, and first piston 7 is equipped with the size from last to the toper section that progressively enlarges down, and when first piston 7 did not receive external force to push down, was in extreme position under the holding power of first spring 8, and the toper section forms line seal with the centre bore contact, isolated body 6 inside and external environment.

The outer edge of the top of the first piston 7 expands outwards to form an upper elastic outer expanding part 13, the outer edge of the upper elastic outer expanding part 13 is in contact sealing with the inner wall of the body 6 to prevent liquid in the water storage bin 10 from leaking outwards, an air inlet groove 25 is formed in the top of the body, the upper elastic outer expanding part 13 can move downwards to the air inlet groove 25 along with the first piston 7, at the moment, the conical section of the first piston 7 leaves the central hole downwards, and the exhaust hole 18 is located between the upper elastic outer expanding part 13 and the lower elastic outer expanding part 12, so that gas in the external environment can enter the body 6 through the gap between the collar piece 4 and the first piston 7 and the air inlet groove 25 and then enters the container 100 through the exhaust hole 18 of the body 6. That is, when the precompression pump is depressed to spray liquid outward, the reduced amount of liquid in the container 100 can be replenished into the container 100 through the vent holes 18 by external air so as to avoid vacuum generation inside the container 100 that could cause the container 100 to deform or the pump body to become nonfunctional.

It should be noted that, when the external environment replenishes the air into the container 100 during the pressing start, the upper elastic flared part 13 of the first piston 7 supplies air downwards or upwards when passing through the air inlet slot 25, and after the upper elastic flared part 13 moves away from the air inlet slot, the outer edge of the upper elastic flared part 13 contacts and seals with the inner wall of the body 6 again, so as to ensure that the liquid in the water storage bin 10 does not leak outwards.

Because the top end of the body 6 is open, various parts such as the first spring 8, the one-way valve ball 9, the first piston 2, the spring retainer 1, the second piston 2, the second spring 5 and the like can be arranged in the open position during installation, then the collar piece 4 is arranged, and the collar piece 4 and the body 6 are buckled and fixed, thereby being convenient for the assembly of the precompression pump, preventing the parts from scattering and improving the structural stability.

The use of the precompression pump is described in detail below.

As shown in fig. 1 to 3, when the pressing head assembly is pressed for the first time, the pressing head assembly drives the pre-pressing piston assembly to move downwards against the pre-pressing force of the first spring 8, at this time, the second piston 2 is sealed with the first piston 7 under the pre-pressing force of the second spring 5, the one-way valve ball 9 is sealed with the body 6, the first piston 7 is sealed with the body 6 under the action of the lower elastic expansion part 12, the pre-pressing piston assembly is in sliding fit with the body 6 to move downwards, and the air in the communicated water storage bin 10 and the pressure transformation bin 14 is compressed as the sealing space becomes smaller. As shown in fig. 4, when the pre-pressing piston assembly moves down until the lower resilient extension 12 of the first piston 7 contacts the air discharge regulating protrusion 17 in the body 6, the lower resilient extension 12 is resiliently deformed, and the compressed air in the water storage 10 is discharged from the air discharge regulating protrusion 17 and then discharged through the air discharge hole 18 in the side of the body 6.

Then the pressing head component is loosened, the pressing head component and the pre-pressing piston component start to move upwards under the action of the resilience force of the first spring 8, at the moment, the first piston 7 is separated from the exhaust adjusting convex strip 17 arranged in the body 6, the lower elastic expansion part 12 is attached to the inner wall of the body 6 again, and the communication space of the water storage bin 10 and the pressure changing bin 14 is recovered and sealed. As shown in fig. 5, as the prepressing piston assembly moves upwards, the sealed space becomes larger to form a vacuum, and at this time, the liquid in the container enters the water storage bin 10 from the suction pipe 21 through the check valve ball 9 under the action of the vacuum, and after the pressing process is repeated for several times, all the air in the sealed space is replaced by the liquid.

After the sealed space is filled with liquid, the press head assembly is pressed, the sealed space gradually becomes smaller along with the downward movement of the pre-pressing piston assembly, pressure is generated inside the liquid at the moment, all parts contacting with the liquid are subjected to a pressure, when the pressure applied to the second piston 2 exceeds the pre-pressing force of the second spring 5, the second piston 2 moves to be separated from the water outlet channel 16 of the first piston 7, the water outlet channel 16 is opened, and at the moment, the liquid enters the press head assembly through the water outlet channel 16 and is sprayed outwards through the nozzle 22. Meanwhile, as shown in fig. 3 and 6, as the liquid in the container 100 is reduced to form vacuum, during the downward movement of the pre-pressing piston assembly, the external air enters the container 100 through the air inlet groove 25 and the gap 23 between the collar 4 and the first piston 7 and through the air outlet hole 18 of the body 6, so as to ensure that the pressure in the container 100 is consistent with the external environment, thereby realizing the continuous use function of the pump body.

As shown in fig. 3, the present invention also proposes a container 100 comprising: a bottle body 24, the bottle body 24 being equipped with the above-mentioned precompression pump, the suction tube of the precompression pump being placed in the bottle body 24, the air vent hole 18 of the body 6 being in communication with the interior of the bottle body 24 so as to supplement the air in the external environment into the bottle body 24 when the liquid in the bottle body 24 is reduced, thereby maintaining the precompression pump function. The bayonet socket that the size tightened up is equipped with at the top of

bottle

24, and 6 cartridges of body are in the bayonet socket, and the neck piece 4 is located the bayonet socket outside, and the outer lane cladding of bayonet socket has fixes the fixed cover 11 on the bayonet socket with the 4 centre gripping of neck piece, prevents that the precompression pump from droing and becoming flexible from bottle 24.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention, and any modifications, equivalents, improvements, etc. made within the spirit and principles of the present invention should be included within the scope of the present invention.

Claims

1. A reduced height and liquid-tight precompression pump comprising: the water storage device comprises a body, a first piston assembly and a pressing head assembly, wherein the first piston assembly is movably arranged in the body, the pressing head assembly is arranged at the top of the first piston assembly, a water storage bin is arranged between the body and the first piston assembly, a water outlet channel is arranged in the first piston assembly, and the water outlet channel is communicated with the water storage bin and a nozzle of the pressing head assembly;

it is characterized by also comprising: the second piston is movably arranged in the first piston assembly, and the second spring is supported between the second piston and the first piston assembly, and the second piston is provided with a thimble part for closing the water outlet channel.

2. The pre-compression pump of claim 1, wherein the first piston assembly comprises: the water storage device comprises a body, a first piston movably arranged in the body, a spring retainer arranged in the first piston, and a first spring supported between the body and the spring retainer, wherein a space between the first piston and the body forms the water storage bin;

the second piston is movably arranged in the spring retainer, the second spring is supported between the spring retainer and the second piston, a space between the upper part of the second piston and the first piston forms a pressure-changing cabin, and the pressure-changing cabin is communicated with the water storage cabin.

3. The pre-compression pump of claim 2, wherein the space between the underside of the second piston and the spring retainer forms a compression chamber, the second piston being provided with an outwardly expanding inner resilient flared portion, the outer edge of which is in contact with the inner wall of the spring retainer to seal the compression chamber.

4. The pre-compression pump as claimed in claim 2, wherein the side wall of the body is provided with an air discharge hole, the bottom outer edge of the first piston expands outward to form a lower elastic expansion portion for sealing the water storage bin, the body is provided with an air discharge regulation rib inside, the lower elastic expansion portion is located below the lower elastic expansion portion, and the lower elastic expansion portion deforms when moving downward to touch the air discharge regulation rib so as to allow air inside the water storage bin to be discharged outward.

5. The precompression pump of claim 4, wherein the top end of the body is open, a collar is fixedly mounted to the open, the collar is provided with a central hole that fits over the first piston, the first piston is provided with a tapered section that gradually increases in size from top to bottom, and the central hole contacts the tapered section to form a line seal.

6. The pre-compression pump as claimed in claim 5, wherein the top outer edge of the first piston expands outward to form an upper resilient flared portion, the outer edge of the upper resilient flared portion is sealed in contact with the inner wall of the body, the top of the body is provided with an air inlet groove, and the upper resilient flared portion can move downward with the first piston to the air inlet groove to allow external air to enter the air outlet hole.

7. The precompression pump of claim 2, wherein the water outlet channel is located inside the first piston and above the second piston, the spike portion is located at the top of the second piston, at least one step is provided at an end of the water outlet channel close to the second piston, the size of the spike portion increases gradually from top to bottom, and an edge of each step contacts with the spike portion to form a line seal.

8. The precompression pump as claimed in claim 1, wherein the body has a water intake channel communicating with the water storage bin, a check valve ball is placed at the top end of the water intake channel, a suction pipe is connected to the bottom end of the water intake channel, the periphery of the check valve ball is surrounded by at least three limiting ribs arranged at intervals, and the check valve ball moves up and down in a space surrounded by the limiting ribs.

9. A container, comprising: bottle, characterized in that it is equipped with a precompression pump as claimed in any of claims 1 to 8.

10. The container according to claim 9, wherein the bottle body is provided with a bayonet, the body is installed inside the bayonet, a collar is fixedly installed at the top end of the body, and a fixing sleeve for clamping and fixing the collar on the bayonet is wrapped on the outer ring of the bayonet.