Pumping assembly for liquid dispensing device and liquid dispensing device

Abstract

The present invention provides a pumping assembly for a liquid dispensing device, the pumping assembly comprising: a base, a liquid inlet connected to the liquid to be dispensed is arranged at the bottom of the base; a pump core, which is arranged at the bottom of the base and has a first relative displacement with the base along the axial direction, and the pump core selectively closes the liquid inlet by movement; a reciprocating component, which is arranged in the base and forms a sealed cavity with a variable volume with the pump core, the reciprocating component and the base have a second relative displacement along the axial direction, the second relative displacement is greater than the first relative displacement, and a liquid outlet is arranged at the top end of the reciprocating component; a one-way valve, which is arranged between the pump core and the reciprocating component, the one-way valve and the reciprocating component have a third relative displacement along the axial direction, and have a fourth relative displacement with the base along the axial direction, the fourth relative displacement is greater than the third relative displacement, and the one-way valve can selectively seal the liquid outlet by movement; and a pressing component, which can press the reciprocating component and the one-way valve.

Description

Technical Field

[0001] The present invention relates to a device for discharging liquid, and more particularly to a dispensing pump for a liquid dispensing device and a dispensing device comprising the dispensing pump. Background Art

[0002] With the continuous improvement of living standards, people pay more and more attention to their own image, so makeup is becoming more and more popular. People even think that makeup is a kind of respect and courtesy to friends or guests they are about to meet. Therefore, makeup is becoming more and more valued and welcomed by the public, especially women.

[0003] At present, some cosmetics, especially liquid cosmetics, are applied by sponges and then pressed onto the human face for homogenization, which causes waste of cosmetics. In addition, the used sponges are generally placed in the atmosphere, which makes the cosmetics adsorbed on the sponges easy to solidify and contaminate. Some liquid cosmetics are distributed by pushing a push rod, but this method of distributing liquid by pushing a push rod is cumbersome to operate and often requires the user to operate with both hands at the same time. Due to the obstruction of the arms, it is difficult for the user to check the current makeup status of the user and cannot adjust the makeup status in time, so the use process is cumbersome and complicated.

[0004] At present, various packaging including containers and dispensing systems for household items, cosmetics and other items have been widely used and developed. The dispensing device used in such packaging and its dispensing system also needs to be continuously improved to make it more convenient and user-friendly. The existing liquid dispensing container is prone to abnormal operation of the pumping assembly during use. There is a situation where the pumping assembly is stuck and cannot pump out the liquid. There is also a situation where the liquid cannot be pumped normally due to the inaccurate fit between the various parts. There is also a situation where the liquid is not pumped evenly due to the large gap between the parts.

[0005] Therefore, there is a need in the art to provide a pumping assembly and a related liquid dispensing device that have relatively stable dispensing, a relatively firm structure, and are not prone to damage. Summary of the invention

[0006] In order to solve at least one aspect of the above technical problems, an embodiment of the present invention provides a pumping assembly for a liquid dispensing device, the pumping assembly comprising:

[0007] A base, wherein a liquid inlet is provided at the bottom of the base and is connected to the liquid to be dispensed;

[0008] A pump core, which is arranged at the bottom of the base and has a first relative displacement with the base along the axial direction, and the pump core selectively closes the liquid inlet through movement;

[0009] A reciprocating component, the reciprocating component is arranged in the base, and forms a sealed cavity with a variable volume with the pump core, the reciprocating component and the base have a second relative displacement along the axial direction, the second relative displacement is greater than the first relative displacement, and a liquid outlet is arranged at the top end of the reciprocating component;

[0010] a one-way valve, the one-way valve being disposed between the pump core and the reciprocating component, the one-way valve having a third relative displacement with the reciprocating component along the axial direction, and having a fourth relative displacement with the base along the axial direction, the fourth relative displacement being greater than the third relative displacement, and the one-way valve being able to selectively seal the liquid outlet by movement; and

[0011] The pressing component can perform a pressing operation on the reciprocating motion component and the one-way valve.

[0012] According to a preferred embodiment of a pumping assembly for a liquid dispensing device according to the present invention, the base includes a first circumferential wall arranged around a liquid inlet, a second circumferential wall arranged on the outside of the first circumferential wall, and a shell wall arranged on the outside of the second circumferential wall, and the first circumferential wall is used to guide the movement of the pump core so that the pump core selectively seals the liquid inlet.

[0013] In another preferred embodiment of the pumping assembly for a liquid dispensing device according to the present invention, the pump core includes an inner peripheral wall forming a channel for the liquid to be dispensed to flow through and an outer peripheral wall arranged on the outside of the inner peripheral wall, and the inner peripheral wall and the outer peripheral wall are connected by a top wall.

[0014] According to yet another preferred embodiment of the pumping assembly for a liquid dispensing device of the present invention, a sealing block for sealing the liquid inlet is formed at a bottom end of the inner portion of the inner peripheral wall of the pump core.

[0015] In another preferred embodiment of the pumping assembly for a liquid dispensing device according to the present invention, at the lower end of the through hole formed by the inner surface of the inner peripheral wall, at least one rib extending toward the center is provided from the inner surface, and a sealing block is provided at the end of the rib.

[0016] According to another preferred embodiment of the pumping assembly for a liquid dispensing device of the present invention, the reciprocating component includes a central circumferential wall forming a liquid outlet, a first circumferential wall located below the central circumferential wall and having a diameter larger than the central circumferential wall, and a second circumferential wall located below the first circumferential wall and having a diameter larger than the first circumferential wall, the central circumferential wall is connected to the first circumferential wall by a first annular wall, and the first circumferential wall is connected to the second circumferential wall by a second annular wall.

[0017] In another preferred embodiment of the pumping assembly for a liquid dispensing device according to the present invention, the reciprocating component further comprises a third circumferential wall disposed between the first circumferential wall and the central circumferential wall, the third circumferential wall extending downward from the first annular wall.

[0018] According to another preferred embodiment of the pumping assembly for a liquid dispensing device of the present invention, the pumping assembly further comprises a spring disposed between the reciprocating component and the base.

[0019] In another preferred embodiment of the pumping assembly for a liquid dispensing device according to the present invention, the pumping assembly also includes a spring arranged between the reciprocating component and the base around the third circumferential wall, the base includes a spring support portion, and the spring is arranged between the first annular wall of the reciprocating component and the spring support portion.

[0020] According to another preferred embodiment of the pumping assembly for a liquid dispensing device of the present invention, the pumping assembly comprises a first limiting component for limiting the upward movement distance of the pump core.

[0021] In another preferred embodiment of the pumping assembly for a liquid dispensing device according to the present invention, the first limiting component includes a first limiting protrusion arranged on the pump core and a second limiting protrusion arranged on the base.

[0022] According to another preferred embodiment of the pumping assembly for a liquid dispensing device of the present invention, the pump core comprises a sliding pusher portion provided on the outer peripheral wall, the sliding pusher portion being in frictional contact with the third peripheral wall.

[0023] In another preferred embodiment of the pumping assembly for a liquid dispensing device according to the present invention, the lower end of the valve stem of the one-way valve is accommodated in a channel formed by the inner circumferential wall of the pump core, and interferes with the inner surface of the inner circumferential wall so that the one-way valve and the pump core can move together or relative to each other.

[0024] According to another preferred embodiment of a pumping assembly for a liquid dispensing device of the present invention, the pumping assembly includes a limiting portion for limiting the stroke of a reciprocating component, the limiting portion including a lower stroke limiting portion arranged at the bottom of the base, an upper stroke limiting portion arranged on the outer shell wall of the base, and a protrusion arranged on the reciprocating component.

[0025] In another preferred embodiment of a pumping assembly for a liquid dispensing device according to the present invention, the pressing component includes a first side circumferential wall that is interference fit on the outside of the central circumferential wall of the reciprocating component, a second side circumferential wall that is interference fit on the outside of the first circumferential wall of the reciprocating component, and a pressing top wall arranged at the top ends of the first side circumferential wall and the second side circumferential wall.

[0026] According to another preferred embodiment of the pumping assembly for a liquid dispensing device of the present invention, the pressing top wall is configured so that when the one-way valve seals the liquid outlet, the inner wall surface of the pressing top wall has a predetermined distance from the top of the one-way valve.

[0027] In another preferred embodiment of the pumping assembly for a liquid dispensing device according to the present invention, a matching structure for sealingly matching with a container containing liquid is provided on the outer peripheral wall of the base.

[0028] The present invention also provides a liquid dispensing device, which includes a container for storing liquid to be dispensed, a sliding sealing component arranged in the container, a pumping assembly arranged at the opening of the container, and a shell arranged outside the container and the pumping assembly, wherein the pumping assembly is any one of the pumping assemblies described above.

[0029] Compared with the prior art, the present invention has at least one of the following beneficial effects:

[0030] (1) The present invention provides a pumping assembly for a liquid dispensing device with an ingenious design, which can not only achieve continuous dispensing of the liquid to be dispensed, but also ensure the consistency and uniformity of the liquid dispensed each time.

[0031] (2) The pumping assembly according to the present invention achieves vacuum preservation of the internal liquid by arranging a sliding sealing component at the bottom of the liquid container and by reasonably controlling the liquid inlet and the liquid outlet, thereby making the liquid have a longer shelf life.

[0032] (3) The present invention also provides a corresponding sealing structure on the outside of the base of the pumping assembly, so that the pumping assembly can be sealed and firmly connected to the container containing liquid, which not only ensures the sealing performance of the corresponding liquid dispensing device, but also makes the liquid dispensing device have a more solid structure, thereby extending its life cycle and saving social resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Other objects and advantages of the present invention will become apparent from the following description of the present invention with reference to the accompanying drawings, which will help to provide a comprehensive understanding of the present invention.

[0034] Figure 1 A perspective view of a pumping assembly for a liquid dispensing device according to the present invention;

[0035] Figure 2 A perspective exploded view of a pumping assembly for a liquid dispensing device according to the present invention;

[0036] Figure 3 For along Figure 1 A cross-sectional view taken along line AA in FIG.

[0037] Figure 4 For along Figure 1 A cross-sectional view taken along line BB in FIG.

[0038] Figure 5 is a perspective exploded view of a liquid dispensing device according to the present invention;

[0039] Figure 6 is a partial cross-sectional view of the liquid dispensing device according to the present invention in a first state;

[0040] Figure 7 is a partial cross-sectional view of the liquid dispensing device according to the present invention in a second state;

[0041] Figure 8 is a partial cross-sectional view of the liquid dispensing device according to the present invention in a third state;

[0042] Fig. 9 is a partial cross-sectional view of the liquid dispensing device according to the present invention in a fourth state.

[0043] It should be noted that the drawings are not necessarily drawn to scale, but are merely shown in a schematic manner that does not affect the reader's understanding. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiment is one embodiment of the present invention, not all embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] Unless otherwise defined, technical or scientific terms used in the present invention shall have the common meanings understood by one having ordinary skills in the field to which the present invention belongs.

[0046] According to a preferred embodiment of the present invention, a pumping assembly 10 for a liquid dispensing device is provided. Figure 1 As shown, the pumping assembly 10 has a solid structure through its sophisticated structural design, so that its various parts can maintain a close fit during use, thereby ensuring the uniformity of liquid distribution, and also making the pumping assembly 10 have a solid structure, thereby greatly extending the life cycle of the pumping assembly 10.

[0047] The pumping assembly 10 according to the present invention mainly includes components such as a base 12, a pump core 14, a reciprocating component 16, a one-way valve 18, and a pressing component 20, wherein the base 12 is used to support the entire pumping assembly 10 and to protect the internal components, and the pump core 14, the reciprocating component 16, the one-way valve 18, and the pressing component 20 are arranged in the base 12 and cooperate with each other to form a variable liquid containing cavity, thereby completing the suction and discharge of the liquid. The specific structure of each component will be described in detail with reference to the accompanying drawings.

[0048] As the shell and supporting component of the pumping assembly 10, the base 12 can be set to a cylindrical structure, and a liquid inlet 122 connected to the liquid fluid to be distributed is set at the bottom of the base 12. The pump core 14 of the pumping assembly 10 is set at the bottom of the base 12, and has a first relative displacement with the base 12 along the axial direction. The pump core 14 selectively closes the liquid inlet 122 by moving relative to the base 12. Here, the axial direction refers to the direction parallel to the movement direction of the pressing component 20, that is, the vertical direction when the pumping assembly 10 according to the present invention is in an upright position. That is to say, when it is necessary to inhale liquid from a container located below the base 12, the pump core 14 can be controlled to move upward so that the liquid inlet 122 is in an open state, so that the liquid is inhaled; when the pumping assembly 10 is required to pump liquid to the outside, it is necessary to control the pump core 14 to move downward so as to seal the liquid inlet 122, thereby preventing the liquid from flowing back into the liquid container.

[0049] The reciprocating component 16 is a power component of the pumping assembly 10. It is arranged in the base 12 and forms a sealed cavity with a variable volume with the pump core 14. The liquid to be distributed is sucked into the sealed cavity when the sealed cavity is enlarged, and the liquid is distributed when the volume of the sealed cavity is reduced. The reciprocating component 16 and the base 12 have a second relative displacement along the axial direction, which is greater than the first relative displacement. The top end of the reciprocating component 16 is provided with a liquid outlet 162. The first relative displacement of the pump core 14 relative to the base 12 is small, such as 0.6 mm (of course, other distance values ​​can also be used). The first relative displacement can be the pump core 14 sealing or opening the liquid inlet 122. The second relative displacement of the reciprocating component 16 and the base 12 can make the sealed cavity between the pump core 14 and the reciprocating component 16 larger or smaller. Here, the up and down movement of the pump core 14 is achieved by the force of the reciprocating member 16 , so the relative displacement between the reciprocating member 16 and the pump core 14 is the difference between the second relative displacement and the first relative displacement.

[0050] The one-way valve 18 has a third relative displacement with the reciprocating component 16 along the axial direction, and the one-way valve 18 has a fourth relative displacement with the base 12 along the axial direction, the fourth relative displacement is greater than the third relative displacement, and the one-way valve 18 can selectively seal the liquid outlet 162 by moving. The movement state of the one-way valve 18 relative to the base 12 is similar to the movement state of the pump core 14 relative to the base 12, and the relative movement between the one-way valve 18 and the reciprocating component 16 can seal or open the liquid outlet 162 at the top of the reciprocating component 16. The valve body 182 of the one-way valve 18 is used to cooperate with the liquid outlet 162 so as to open or close the liquid outlet 162, and the lower end of the valve stem 184 of the one-way valve 18 is inserted into the pump core 14, and there is an interference fit with the pump core 14, so as to provide friction between the valve stem 184 and the pump core 14. Here, the valve stem 184 can adopt a cross-shaped structure, and the gap between the cross-shaped structures is used for the passage of liquid. Of course, other shapes of the valve stem 184 may also be used, such as a cross-shaped, hollow cylinder, polygon, etc. The third relative displacement of the one-way valve 18 relative to the reciprocating member 16 is relatively small, such as 0.4 mm, and is only used to open or close the liquid outlet 162. After the one-way valve 18 has a relative displacement of 0.4 mm relative to the reciprocating member 16, the two are relatively stationary, that is, they move together relative to the base 12.

[0051] The pressing component 20 is arranged on the upper part of the reciprocating component 16 for directly operating the reciprocating component 16 . The reciprocating component 16 can also directly operate the one-way valve 18 , that is, the pressing component 20 can press the reciprocating component 16 and the one-way valve 18 respectively.

[0052] The structures of the various components of the pumping assembly 10 according to the present invention will be described below. First, the base 12 will be described. The base 12 has a cylindrical structure, which includes a first circumferential wall 124 arranged around a liquid inlet 122, a second circumferential wall 126 arranged outside the first circumferential wall 124, and an outer shell wall 128, and the outer shell wall 128 serves as an outer shell of the base 12. The first circumferential wall 124 is used to guide the movement of the pump core 14 so that the pump core 14 selectively seals the liquid inlet 122. Two notches are symmetrically arranged on the upper part of the outer shell wall 128 of the cylindrical structure to provide a movement space for the pressing and rebounding process of the pressing component 20. The heights of the first circumferential wall 124 and the second circumferential wall 126 are both smaller than the height of the outer shell wall 128. The liquid inlet 122 in the base 12 can be formed in such a manner that a bottom wall 1242 that closes the inner hole of the first circumferential wall 124 is formed at the lower end inside the first circumferential wall 124, and an upwardly protruding boss 1244 is formed at the center of the bottom wall 1242, and the liquid inlet 122 is formed on the boss 1244. The liquid inlet 122 can be arranged to have a chamfer at the orifice to facilitate sealing of the liquid inlet 122 through the chamfered orifice.

[0053] The pump core 14 includes an inner peripheral wall 142 forming a channel through which the liquid to be dispensed flows, and an outer peripheral wall 144 disposed outside the inner peripheral wall 142, and the inner peripheral wall 142 and the outer peripheral wall 144 are connected by a top wall 146. A sealing block 148 for sealing the liquid inlet 122 is formed at the inner bottom end of the inner peripheral wall 142 of the pump core 14, and the sealing block 148 cooperates with the orifice of the liquid inlet 122 to seal and open the liquid inlet 122. The sealing block 148 can be formed in the following manner: at the lower end of the through hole formed by the inner surface of the inner peripheral wall 142, at least one rib 1422 extending toward the center is disposed from the inner surface, and the sealing block 148 is disposed at the end of the rib 1422. Here, three or four ribs 1422 are preferably provided, and the sealing block 148 is supported on the inner surface of the inner peripheral wall 142 by the ribs 1422. The lower end of the sealing block 148 can also be provided with a chamfer so as to cooperate with the liquid inlet 122 with a chamfer.

[0054] The reciprocating component 16 of the pumping assembly 10 may include a central circumferential wall 164 forming a liquid outlet 162, a first circumferential wall 166 located below the central circumferential wall 164 and having a larger diameter than the central circumferential wall 164, and a second circumferential wall 168 located below the first circumferential wall 166 and having a larger diameter than the first circumferential wall 166, the central circumferential wall 164 and the first circumferential wall 166 are connected via a first annular wall 165, and the first circumferential wall 166 and the second circumferential wall 168 are connected via a second annular wall 167. That is, the reciprocating component 16 is formed into a circular stepped structure when viewed from the outside, the lowermost step having the largest diameter is formed by the second circumferential wall 168, the middle step is formed by the first circumferential wall 166, and the uppermost step is formed by the central circumferential wall 164. An inner chamfer may be processed at the end of the central circumferential wall 164 where the liquid outlet 162 is formed, so that the liquid outlet 162 is formed into a truncated cone shape, thereby facilitating cooperation with a corresponding inclined sealing surface of the valve body 182 of the one-way valve 18 .

[0055] Further, the reciprocating component 16 further includes a third circumferential wall 169 disposed inside the first circumferential wall 166, and the third circumferential wall 169 extends downward from the first annular wall 165. The third circumferential wall 169 is sleeved outside the outer circumferential wall 144 of the pump core 14, and is used to guide the movement of the pump core 14, and the second circumferential wall 126 of the base 12 is sleeved outside the third circumferential wall 169, and is used to limit the movement of the pump core 14. The pumping assembly 10 according to the present invention further includes a spring 15 disposed between the reciprocating component 16 and the base 12, and the spring 15 can provide elastic force for the reset movement of the reciprocating component 16. Here, the spring 15 is arranged around the outside of the third circumferential wall 169, and the spring 15 also surrounds the second circumferential wall 126 of the base 12. The lower part of the spring 15 is supported on the spring support part 130 formed on the bottom plate of the base 12, and the upper part of the spring 15 can support the first annular wall 165 of the reciprocating component 16. That is, the spring 15 is arranged between the first annular wall 165 of the reciprocating component 16 and the spring support part 130.

[0056] The pumping assembly 10 for a liquid dispensing device according to the present invention further includes a first limiting component for limiting the upward movement distance of the pump core 14. The first limiting component includes a first limiting protrusion 1442 provided on the pump core 14 and a second limiting protrusion 1262 provided on the base 12. Preferably, the first limiting protrusion 1442 is provided at the lower end of the outer peripheral wall 144 of the pump core 14, and the second limiting protrusion 1262 is provided at the lower end of the second circumferential wall 126 of the base 12, so that the pump core 14 moves between the position where the lower end surface of the outer peripheral wall 144 contacts the bottom plate of the base 12 and the position where the first limiting protrusion 1442 and the second limiting protrusion 1262 are mutually locked, so that the pump core 14 has a movement distance of about 0.6 mm. In addition, in order to prevent the first limiting protrusion 1442 from passing over the second limiting protrusion 1262 and being disengaged when the pump core 14 is subjected to a large upward force, an anti-deformation circumferential wall 125 is provided on the bottom plate of the base 12 to prevent the end of the outer peripheral wall 144 from being deformed. The height of the anti-deformation circumferential wall 125 is set to cover the movement distance of the end of the outer peripheral wall 144 of the pump core 14. Figure 3 and Figure 4 It can be seen that the deformation preventing circumferential wall 125 has a shorter height.

[0057] In addition, the pump core 14 also includes a sliding propulsion portion 1444 arranged on the outer peripheral wall 144, and the sliding propulsion portion 1444 is in frictional contact with the third circumferential wall 169 of the reciprocating component 16, thereby being able to provide a force for the pump core 14 through the third circumferential wall 169 to move it downward, and when the pump core 14 moves to its lowest position, the reciprocating component 16 can continue to move relative to the pump core 14 under a greater force.

[0058] The lower end of the valve stem 184 of the one-way valve 18 is accommodated in the channel formed by the inner peripheral wall 142 of the pump core 14, and is in interference fit with the inner surface of the inner peripheral wall 142, so that the pump core 14 can prevent the movement of the one-way valve 18, so that when the reciprocating component 16 moves downward, the one-way valve 18 remains stationary, thereby opening the liquid outlet 162 of the reciprocating component 16, and at this time, the displacement of the one-way valve 18 relative to the reciprocating component 16 is about 0.4 mm. When the pressing component 20 continues to move downward, the pressing component 20 directly pushes the one-way valve 18 to move downward, overcomes the friction between the inner peripheral wall 142 of the pump core 14 and the valve stem 184 of the one-way valve 18, so that the one-way valve 18 continues to move downward relative to the pump core 14, so that the volume of the sealed cavity between the pump core 14 and the reciprocating component 16 becomes smaller.

[0059] The pumping assembly 10 according to the present invention further includes a limiting portion for limiting the stroke of the reciprocating component 16, the limiting portion including a lower stroke limiting portion 132 disposed at the bottom of the base 12, an upper stroke limiting portion 134 disposed on the outer shell wall 128 of the base 12, and a protrusion 1682 disposed on the reciprocating component 16. Preferably, the protrusion 1682 is disposed at the outer side of the end of the second circumferential wall 168 of the reciprocating component 16. When the reciprocating component 16 moves downward so that the lower end surface of the second circumferential wall 168 contacts the upper end surface of the lower stroke limiting portion 132, the reciprocating component 16 is blocked by the lower stroke limiting portion 132, thereby preventing it from further moving downward; when the reciprocating component 16 moves upward, the protrusion 1682 of the reciprocating component 16 contacts the upper stroke limiting portion 134 on the outer shell wall 128 of the base 12, thereby limiting the further upward movement of the reciprocating component 16, thereby limiting the movement stroke of the reciprocating component 16.

[0060] The one-way valve 18 of the pumping assembly 10 according to the present invention includes a valve body 182 for sealing or opening the liquid outlet 162 and a valve stem 184 disposed below the valve body 182 and applying force to the valve body 182 to move the valve body 182 .

[0061] The pressing component 20 of the pumping assembly 10 according to the present invention comprises a first side circumferential wall 202 which is sealed and fitted on the outer side of the central circumferential wall 164 of the reciprocating component 16, a second side circumferential wall 204 which is interference-fitted on the outer side of the first circumferential wall 166 of the reciprocating component 16, and a pressing top wall 206 which is arranged at the top ends of the first side circumferential wall 202 and the second side circumferential wall 204. A sealing fit is achieved between the central circumferential wall 164 of the reciprocating component 16 and the first side circumferential wall 202 of the pressing component 20, so as to form a sealed cavity therebetween, so as to contain the discharged liquid when the liquid to be dispensed is discharged through the liquid outlet 162 of the reciprocating component 16, and to discharge the liquid to the outside through the discharge channel arranged in the pressing component 20. The pressing top wall 206 of the pressing component 20 is arranged so that when the one-way valve 18 seals the liquid outlet 162, the inner wall surface of the pressing top wall 206 has a predetermined distance from the top of the one-way valve 18, so as to be able to open the liquid outlet 162 and maintain the liquid outlet 162 with a certain opening.

[0062] Furthermore, a matching structure 1280 for sealingly matching with a container containing liquid is provided on the shell wall 128 of the base 12. The matching structure 1280 may include at least one flange provided on the outer side of the shell wall 128. Figure 3 and Figure 4In the embodiment shown, three flanges are provided, namely, a first flange 1281 for cooperating with the upper edge of the container for holding liquid, a second flange 1282 and a third flange 1283 cooperating with the inner wall of the container, wherein the above-mentioned single flanges are all sealed with the container to ensure that the liquid is sealed in the container. In addition, a top cover 22 that cooperates with the shape of the pressing component 20 and the base 12 can be provided on the outer side of the pressing component 20, so that the pumping assembly 10 for the liquid dispensing device according to the present invention has a more beautiful and practical appearance.

[0063] The present invention also provides a liquid dispensing device 100, which includes a container 101 for storing liquid to be dispensed, a sliding sealing component 102 arranged in the container 101, a pumping component arranged at the opening of the container 101, and a shell 103 arranged outside the container 101 and the pumping component, wherein the pumping component of the liquid dispensing device 100 is the pumping component 10 as described above.

[0064] The following is the attached Figure 6-9 The working process of the liquid dispensing device 100 according to the present invention is described in detail. Figure 6 , a cross-sectional view of the liquid dispensing device 100 in a non-working state is shown, wherein the bottom portion of the liquid dispensing device 100 is omitted. In this figure, the liquid to be dispensed is stored in a closed cavity composed of the pumping assembly 10, the container 101 and the sliding sealing component 102, and the closed cavity is in a vacuum state, which is conducive to the long-term storage of the liquid. The sliding sealing component 102 can be a piston component, which can be sealedly connected to the inner wall surface of the container 101, and moves upward as the volume of the liquid in the container 101 decreases, thereby ensuring that no air enters the container 101.

[0065] When the liquid dispensing device 100 is in a Figure 6In the non-working state shown, under the elastic force of the spring 15, the reciprocating component 16 and the pressing component 20 are at the uppermost position, and the pump core 14 is also at the uppermost position. The pump core 14 is limited by the first limiting component and cannot continue to move upward. At this time, due to the interference fit between the one-way valve 18 and the inner peripheral wall 142 of the pump core 14, the pump core 14 exerts a downward pulling force on the one-way valve 18, and the spring 15 exerts an upward thrust on the reciprocating component 16, so that the valve body 182 of the one-way valve 18 can seal the liquid outlet 162 of the reciprocating component 16, thereby isolating the interior of the liquid dispensing device 100 from the outside air. Since the pump core 14 is at the uppermost position, the sealing block 148 of the pump core 14 has a certain distance from the chamfer of the orifice of the liquid inlet 122, that is, the sealing block 148 does not seal the liquid inlet 122, and the variable volume sealing cavity of the pumping assembly 10 is connected to the interior of the container 101.

[0066] The following is the attached Figure 7 The state when the pressing component 20 is initially pressed is described. At this time, the pressing component 20 is slightly pressed, and the reciprocating component 16 is pressed downward by the pressing component 20. Since the sliding propulsion portion 1444 provided on the outer peripheral wall 144 of the pump core 14 is in frictional contact with the third circumferential wall 169 of the reciprocating component 16, that is, the reciprocating component 16 can apply a downward friction force to the pump core 14 through the third circumferential wall 169, and the friction force pushes the pump core 14 to move downward. At the same time, since there is interference fit between the pump core 14 and the one-way valve 18, the pump core 14 will drive the one-way valve 18 to move downward together, so the one-way valve 18 always seals the liquid outlet 162 during this process. When the displacement of the downward movement reaches about 0.6 mm, that is, it reaches the lowest end position of the pump core 14, the sealing block 148 of the pump core 14 seals the liquid inlet 122, and the pump core 14 stops moving.

[0067] The following entry Figure 8The liquid discharge process shown. Since the volume of the sealed cavity of the pumping assembly 10 does not change substantially during this process, the volume of the liquid in the sealed cavity does not change substantially either. The pressing component 20 continues to be pressed, and the reciprocating component 16 continues to move downward. Since the pump core 14 has reached its lowest position, it cannot move further downward, and there is an interference force between the pump core 14 and the one-way valve 18. The movement of the one-way valve 18 is blocked by the pump core 14. At this time, relative movement occurs between the one-way valve 18 and the reciprocating component 16, and the valve body 182 of the one-way valve 18 disengages from the liquid outlet 162 of the reciprocating component 16, thereby gradually opening the liquid outlet 162 to allow the liquid to flow through the liquid outlet 162. When the top of the one-way valve 18 abuts against the lower surface of the pressing top wall 206 of the pressing component 20, the total downward displacement of the pressing component 20 is approximately 1 mm, and the liquid outlet 162 is in the maximum open position. Then the one-way valve 18 moves downward with the pressing component 20 and the reciprocating component 16 until the pressing component 20 and the reciprocating component 16 reach the lowest position.

[0068] After the top of the one-way valve 18 abuts against the lower surface of the pressing top wall 206 of the pressing component 20, the pressing operation on the pressing component 20 is continued, which will overcome the interference force between the valve stem 184 of the one-way valve 18 and the inner peripheral wall 142 of the pump core 14, and continue to move downward relative to the pump core 14, thereby reducing the volume of the variable volume sealed space of the pumping component 10 and discharging the liquid from the sealed space to the outside. In this process, the liquid inlet 122 is always in a closed state, and the liquid outlet 162 is always in an open state. During the downward movement of the reciprocating component 16, the lower end surface of the second circumferential wall 168 of the reciprocating component 16 will contact the lower stroke limiting portion 132 set at the bottom of the base 12, thereby limiting the reciprocating component 16 from continuing to move downward. At this time, the total stroke of the reciprocating component 16 is approximately 5 mm.

[0069] After pressing the pressing member 20 to its lowermost position, the Fig. 9The liquid suction process shown. In this process, the operator releases the pressing component 20, and the reciprocating component 16 moves upward under the action of the spring force provided by the spring 15. The reciprocating component 16 applies an upward friction force to the pump core 14 through the third circumferential wall 169, and the friction force pushes the pump core 14 to move upward, thereby opening the liquid inlet 122 at the bottom of the base 12 until the second limiting protrusion 1262 provided on the second circumferential wall 126 of the base 12 contacts the first limiting protrusion 1442 provided at the lower end of the outer circumferential wall 144 of the pump core 14. At this time, the pump core 14 is in the uppermost position, and the liquid inlet 122 is in the maximum opening position. At this time, the pump core 14, the reciprocating component 16, and the one-way valve 18 move upward as a whole, and the movement distance is about 0.6 mm. Subsequently, under the action of the interference force provided by the inner circumferential wall 142 of the pump core 14, the one-way valve 18 remains temporarily stationary, while the reciprocating component 16 continues to move upward. When the reciprocating component 16 moves upward by approximately 0.4 mm, the valve body 182 of the one-way valve 18 seals the liquid outlet 162. Thereafter, under the action of the interference force provided by the pump core 4 on the one-way valve 18, the one-way valve 18 remains sealed to the liquid outlet 162.

[0070] Subsequently, under the action of the spring force, the reciprocating component 16 continues to move upward, and the upward force on the one-way valve 18 is greater than the interference force provided by the pump core 14, thereby causing the one-way valve 18 to move upward together with the reciprocating component 16. During this process, the liquid inlet 122 is in a fully open state, while the liquid outlet 162 is in a fully closed state, and the volume of the variable-volume sealed cavity of the pumping assembly 10 increases, generating negative pressure therein, thereby sucking the liquid stored in the container 101 into the sealed cavity through the liquid inlet 122. Finally, the protrusion 1682 on the second circumferential wall 168 of the reciprocating component 16 abuts against the upper stroke limiter 134 formed in the outer shell wall 128 of the base 12, thereby causing the reciprocating component 16 to reach its uppermost position, completing the entire liquid suction process. Of course, during the process of the liquid being sucked from the container 101 into the sealed cavity of the pumping assembly 10, the air pressure inside the sliding sealing component 102 at the bottom of the container 101 becomes smaller, while the air pressure outside is relatively larger, thereby generating a pressure difference on both sides of the sliding sealing component 102, causing it to gradually move upward, thereby ensuring that the liquid in the container 101 is always in a vacuum state and preventing air from entering the container 101. Repeatedly pressing the pressing component in this way can achieve continuous distribution of the liquid.

[0071] The strokes of the various components described in the above embodiments are merely exemplary, and the positions of the corresponding limiting mechanisms may be set according to actual needs in order to limit the different strokes of the various components, thereby correspondingly limiting the volume of the sealed cavity of the pumping assembly 10, thereby limiting the amount of fluid dispensed each time the pumping assembly 10 is pressed.

[0072] The present invention proposes a pumping assembly for a liquid dispensing device with an ingenious design, which can not only realize the continuous distribution of the liquid to be distributed, but also ensure the consistency and uniformity of the liquid distributed each time. In addition, the pumping assembly according to the present invention realizes the vacuum preservation of the internal liquid by arranging a sliding sealing component at the bottom of the liquid container and by reasonably controlling the liquid inlet and the liquid outlet, so that the liquid has a longer shelf life. Furthermore, by arranging a corresponding sealing structure on the outside of the base of the pumping assembly, the pumping assembly can be sealed and firmly engaged with the container containing the liquid, which not only ensures the sealing performance of the corresponding liquid dispensing device, but also makes the liquid dispensing device have a more solid structure, thereby extending its life cycle and saving social resources.

[0073] Regarding the embodiments of the present invention, it should also be noted that, in the absence of conflict, the embodiments of the present invention and the features therein may be combined with each other to obtain new embodiments.

[0074] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. The protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A pumping assembly for a liquid dispensing device, characterized in that: include: a base, wherein a liquid inlet connected to the liquid to be dispensed is provided at the bottom of the base; A pump core, the pump core is arranged at the bottom of the base and has a first relative displacement with the base along the axial direction, and the pump core selectively closes the liquid inlet by movement; a reciprocating component, the reciprocating component being arranged in the base and forming a sealed cavity with a variable volume with the pump core, the reciprocating component and the base having a second relative displacement along the axial direction, the second relative displacement being greater than the first relative displacement, and a liquid outlet being arranged at the top end of the reciprocating component; a one-way valve, the one-way valve being arranged between the pump core and the reciprocating component, the one-way valve and the reciprocating component having a third relative displacement along the axial direction, and having a fourth relative displacement with the base along the axial direction, the fourth relative displacement being greater than the third relative displacement, and the one-way valve being able to selectively seal the liquid outlet by movement; as well as A pressing component, wherein the pressing component can perform a pressing operation on the reciprocating component and the one-way valve, wherein the reciprocating component can cause the pump core to move downward until it reaches the lowest end position of the pump core.

2. The pumping assembly for a liquid dispensing device according to claim 1, characterized in that: The base includes a first circumferential wall arranged around the liquid inlet, a second circumferential wall arranged outside the first circumferential wall, and a shell wall arranged outside the second circumferential wall, wherein the first circumferential wall is used to guide the movement of the pump core so that the pump core selectively seals the liquid inlet.

3. The pumping assembly for a liquid dispensing device according to claim 2, characterized in that: The pump core includes an inner peripheral wall forming a channel through which the liquid to be dispensed flows and an outer peripheral wall arranged outside the inner peripheral wall, wherein the inner peripheral wall and the outer peripheral wall are connected via a top wall.

4. The pumping assembly for a liquid dispensing device according to claim 3, characterized in that: A sealing block for sealing the liquid inlet is formed at a bottom end of the inner portion of the inner peripheral wall of the pump core.

5. The pumping assembly for a liquid dispensing device according to claim 4, characterized in that: At the lower end of the through hole formed by the inner surface of the inner peripheral wall, at least one rib extending toward the center is provided from the inner surface, and the sealing block is provided at the end of the rib.

6. The pumping assembly for a liquid dispensing device according to claim 3, characterized in that: The reciprocating component includes a central circumferential wall forming the liquid outlet, a first circumferential wall located below the central circumferential wall and having a larger diameter than the central circumferential wall, and a second circumferential wall located below the first circumferential wall and having a larger diameter than the first circumferential wall, the central circumferential wall and the first circumferential wall are connected via a first annular wall, and the first circumferential wall and the second circumferential wall are connected via a second annular wall.

7. The pumping assembly for a liquid dispensing device according to claim 6, characterized in that: The reciprocating member further includes a third circumferential wall disposed between the first circumferential wall and the central circumferential wall, the third circumferential wall extending downwardly from the first annular wall.

8. The pumping assembly for a liquid dispensing device according to claim 1, characterized in that: The pumping assembly also includes a spring disposed between the reciprocating member and the base.

9. The pumping assembly for a liquid dispensing device according to claim 7, characterized in that: The pumping assembly further includes a spring disposed around the third circumferential wall between the reciprocating component and the base, the base including a spring support portion, the spring being disposed between the first annular wall of the reciprocating component and the spring support portion.

10. The pumping assembly for a liquid dispensing device according to claim 1, characterized in that: The pumping assembly includes a first limiting component for limiting the upward movement distance of the pump core.

11. The pumping assembly for a liquid dispensing device according to claim 10, characterized in that: The first limiting component includes a first limiting protrusion arranged on the pump core and a second limiting protrusion arranged on the base.

12. The pumping assembly for a liquid dispensing device according to claim 7, characterized in that: The pump core includes a sliding propulsion portion disposed on the outer peripheral wall, and the sliding propulsion portion is in frictional contact with the third peripheral wall.

13. The pumping assembly for a liquid dispensing device according to claim 3, characterized in that: The lower end of the valve stem of the one-way valve is accommodated in a channel formed by the inner peripheral wall of the pump core and is interference-fitted with the inner surface of the inner peripheral wall so that the one-way valve and the pump core can move together or relatively.

14. The pumping assembly for a liquid dispensing device according to claim 2, characterized in that: The pumping assembly includes a limiting portion for limiting the stroke of the reciprocating component, the limiting portion including a lower stroke limiting portion arranged at the bottom of the base, an upper stroke limiting portion arranged on the housing wall of the base, and a protrusion arranged on the reciprocating component.

15. The pumping assembly for a liquid dispensing device according to claim 6, characterized in that: The pressing component includes a first side circumferential wall that is interference fit on the outside of the central circumferential wall of the reciprocating component, a second side circumferential wall that is interference fit on the outside of the first circumferential wall of the reciprocating component, and a pressing top wall arranged at the top ends of the first side circumferential wall and the second side circumferential wall.

16. The pumping assembly for a liquid dispensing device according to claim 15, characterized in that: The pressing top wall is arranged such that when the one-way valve seals the liquid outlet, an inner wall surface of the pressing top wall has a predetermined distance from a top of the one-way valve.

17. The pumping assembly for a liquid dispensing device according to claim 1, characterized in that: The outer peripheral wall of the base is provided with a matching structure for sealing with a container containing liquid.

18. A liquid dispensing device, comprising a container for storing a liquid to be dispensed, a sliding sealing component disposed in the container, a pumping assembly disposed at an opening of the container, and a housing disposed outside the container and the pumping assembly, characterized in that: The pumping assembly is a pumping assembly according to any one of claims 1-17.

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