Suction-back emulsion pump, elastic reset tube and emulsion bottle

Abstract

The utility model discloses a back-suction lotion pump, elastic reset tube and lotion bottle, wherein the back-suction lotion pump comprises a head cap, a pump body, a valve body, a driving assembly, a piston and elastic reset tube, the valve body is used for selectively opening and closing the bottom channel of the pump body, the head cap is installed at the top of the driving assembly, and the elastic reset tube is installed at the bottom of the pump body. The piston is arranged at the bottom of the driving assembly in a drivable and sleeved mode and installed in a pump cavity of the pump body in an up-down moving mode, the piston is arranged to be used for selectively allowing and preventing a liquid taking channel of the driving assembly from being communicated with the pump cavity of the pump body, and the elastic reset pipe is arranged at the top of the driving assembly in a sleeved mode. The bottom of the elastic reset pipe is kept still relative to the pump body, the top of the elastic reset pipe abuts against the head cap in a sealed mode, and the inner wall of the elastic reset pipe is attached to the driving assembly in a sealed mode so that a space-variable back suction cavity can be formed between the elastic reset pipe and the driving assembly. The liquid taking channel of the driving assembly and the head cap channel of the head cap are respectively communicated with the back suction cavity.

Description

TECHNICAL FIELD

[0001] The utility model relates to emulsion pump especially relates to a kind of back suction emulsion pump, elastic reset tube and emulsion bottle. BACKGROUND

[0002] The press pump is used for pumping the fluid contained in the bottle. After the pumping action is completed, the fluid remaining in the head cap channel of the press pump needs to be sucked back to avoid automatic dripping of the fluid.

[0003] For example, a back suction press pump device is disclosed in the Chinese utility model patent with the authorization announcement No. CN217625105U. During use, the back suction press pump device is installed on the bottle. First press the pressing piece, and the pressing piece drives the main column and the auxiliary column to move downward while compressing the elastic piece. The space in the body gradually decreases and gradually increases in pressure. At the moment of releasing the pressing piece, the space in the body forms a short negative pressure. After releasing the pressing piece, the pressing piece, the main column and the auxiliary column are quickly reset under the driving of the elastic piece. At this time, due to the instantaneous negative pressure effect in the body, the back suction column moves upward to separate from the second limiting piece and realizes that the contents in the bottle enter the body until the pressure in the body is equal to the external pressure to achieve balance. When liquid is needed, the pressing piece is pressed again. The pressing piece drives the main column and the auxiliary column to move downward while compressing the elastic piece. The space in the body gradually decreases and gradually increases in pressure. Due to the pressurization in the body, the contents in the body will squeeze the back suction column to completely reset and block the second opening. When the pressing piece is continuously pressed, the inner wall of the first clearance groove separates from the end part of the main column (the outer wall of the movable piece is affected by the friction force of the inner wall of the body) to open the flow gap. The pressure difference of the space in the body will squeeze the contents in the body from the flow gap and flow out through the auxiliary column flow channel and the liquid outlet flow channel, realizing the pressing of the liquid outlet. After the liquid outlet is completed, part of the contents remains in the pressing piece. At this time, the pressing piece is released, and the pressing piece, the main column and the auxiliary column are quickly reset under the driving of the elastic piece. At this time, due to the instantaneous negative pressure effect in the body, the back suction column gradually moves upward to separate from the second opening and realizes that the contents in the bottle enter the body. The negative pressure effect in the body will cause the contents remaining in the auxiliary column flow channel and the liquid outlet flow channel to flow back to the body until the pressure in the body is equal to the external pressure to achieve balance. In the back suction press pump device of the prior art, a special back suction column is needed, which leads to more parts, higher cost and more complex structure of the back suction press pump device of the prior art.

[0004] A press pump with back suction function is disclosed in the Chinese Utility Model Patent with the publication number CN209701290U, and its working principle is as follows: in the initial state, the pump core is filled with liquid, when the consumer presses the elastic body downward, the air or liquid in the backflow cavity is compressed and enters the liquid guide pipe through the backflow hole, when the elastic body contacts the top of the pressing body, the pressing head moves vertically downward relative to the connecting body, the liquid guide pipe moves vertically downward, the volume of the pump core decreases, the spring is compressed, the liquid outlet is opened, the liquid inlet is closed, the liquid in the pump core is pumped out through the liquid guide pipe, the liquid outlet, and the nozzle, when the consumer stops pressing the elastic body, the compressed spring stretches and rebounds, the liquid guide pipe moves vertically upward, the liquid outlet is opened, the liquid inlet is closed, a negative pressure is formed in the pump core, liquid is sucked from the bottom end thereof, at the same time, the elastic body gradually resets upward, a negative pressure is also formed in the backflow cavity, and the liquid remaining in the nozzle is sequentially back sucked through the liquid outlet and the liquid guide pipe. The press pump of the prior art requires the pressing head to provide the elastic body, the user needs to press the elastic body, and the user can further press the pressing body after the elastic body is deformed. This mode not only has problems of more components, higher cost and complex structure, but also affects the user's pressing feeling. Utility model content

[0005] One object of the present utility model is to provide a back suction lotion pump, an elastic reset pipe and a lotion bottle, wherein the back suction cavity is formed between the elastic reset pipe and the driving assembly of the back suction lotion pump, when the head cap is pressed and the driving assembly is driven by the head cap to move downward, the elastic reset pipe is deformed to make the space of the back suction cavity smaller, after the head cap is released, the elastic reset pipe pushes the head cap and the driving assembly to move upward in the process of restoring the initial state to make the space of the back suction cavity larger, at this time, the lotion remaining in the head cap channel of the head cap is back sucked to the back suction cavity to avoid dripping.

[0006] One object of the present utility model is to provide a back suction lotion pump, an elastic reset pipe and a lotion bottle, wherein when the head cap is pressed and the driving assembly is driven by the head cap to move downward, the auxiliary elastic member of the back suction lotion pump is deformed to accumulate elastic potential energy, after the head cap is released, the auxiliary elastic member provides auxiliary restoring force in the process of restoring the initial state to assist the elastic reset pipe to push the head cap and the driving assembly to move upward, which makes the back suction lotion pump capable of pumping viscous lotion and other fluids.

[0007] According to one aspect of the present utility model, the present utility model provides a back suction lotion pump, which comprises:

[0008] a head cap, wherein the head cap has a head cap channel;

[0009] a pump body, wherein the pump body has a pump cavity and a bottom channel communicated with the pump cavity;

[0010]

[0010] a valve body, wherein the valve body is configured to selectively open and close the bottom passage of the pump body;

[0011] a drive assembly, wherein the drive assembly has a liquid taking passage, and the head cap is mounted on the top of the drive assembly;

[0012] a piston, wherein the piston is drivingly sleeved on the bottom of the drive assembly and is movably mounted in the pump cavity of the pump body, and the piston is configured to selectively allow and prevent the liquid taking passage of the drive assembly from communicating with the pump cavity of the pump body; and

[0013] a resilient reset tube, wherein the resilient reset tube is sleeved on the top of the drive assembly, the bottom of the resilient reset tube is fixed relative to the pump body, and the top of the resilient reset tube sealingly abuts against the head cap, wherein the inner wall of the resilient reset tube sealingly abuts against the drive assembly to form a space-variable back-suction cavity between the resilient reset tube and the drive assembly, and the liquid taking passage of the drive assembly and the head cap passage of the head cap respectively communicate with the back-suction cavity.

[0014] According to an embodiment of the present application, the drive assembly comprises a piston seat and a drive rod, the piston seat comprises a seat body and an assembly rod extending upward from the seat body, the assembly rod has a first rod body passage, the drive rod comprises a connecting rod and a drive arm extending outward from the bottom of the connecting rod, the connecting rod has a second rod body passage, the piston has a piston hole, the inner diameter of the piston is smaller than the outer diameter of the seat body and the outer diameter of the drive arm, the inner diameter of the piston is greater than or equal to the outer diameter of the bottom of the assembly rod, the top of the assembly rod is fixedly assembled in the connecting rod after passing through the piston hole of the piston, the distance between the seat body and the drive arm is greater than the height of the piston, so that the piston is drivingly sleeved on the bottom of the drive assembly, and the first rod body passage of the assembly rod and the second rod body passage of the connecting rod are communicated to form the liquid taking passage of the drive assembly.

[0015] According to an embodiment of the present application, the bottom of the resilient reset tube sealingly abuts against the peripheral wall of the connecting rod of the drive rod.

[0016] According to one embodiment of the present application, the back suction lotion pump comprises a pump plug, the pump plug has a pump plug hole, an inner diameter size of the pump plug is greater than an outer diameter size of the connecting rod of the driving rod and less than an outer diameter size of the driving arm, the pump plug is fixedly installed in the pump cavity of the pump body, a top of the connecting rod passes through the pump plug hole of the pump plug, and a bottom of the elastic reset tube abuts against the pump plug, so that the bottom of the elastic reset tube is kept stationary relative to the pump body.

[0017] According to one embodiment of the present application, the elastic reset tube comprises a first ring body, a second ring body, a third ring body, a first bellows, a second bellows and a fitting ring, the first ring body, the second ring body and the third ring body are arranged at intervals along a height direction, the first bellows extends downward from an inner side of the second ring body to the first ring body, the second bellows extends upward from the inner side of the second ring body to the third ring body, the fitting ring extends downward from the inner side of the second ring body, and a gap is formed between the fitting ring and the first bellows, wherein the first ring body abuts against the pump plug, the third ring body abuts against the head cap, and the fitting ring is fitted to a peripheral wall of the connecting rod in a manner of being bound to the connecting rod.

[0018] According to one embodiment of the present application, a height size of the first bellows is less than a height size of the second bellows.

[0019] According to one embodiment of the present application, the back suction lotion pump comprises an auxiliary elastic member, a bottom of the auxiliary elastic member is kept stationary relative to the pump body, and a top of the auxiliary elastic member abuts against the head cap.

[0020] According to one embodiment of the present application, the back suction lotion pump comprises an auxiliary elastic member, a bottom of the auxiliary elastic member abuts against the first ring body, and a top of the auxiliary elastic member abuts against the second ring body.

[0021] According to one embodiment of the present application, the back suction lotion pump comprises a cover, and the cover is detachably installed on a top of the pump body.

[0022] According to another aspect of the present application, the present application further provides a lotion bottle, which comprises a bottle body and a back suction lotion pump, and the back suction lotion pump is installed on the bottle body, wherein the back suction lotion pump further comprises:

[0023] a head cap, wherein the head cap has a head cap channel;

[0024] a pump body, wherein the pump body has a pump cavity and a bottom channel communicated with the pump cavity;

[0025] a valve body, wherein the valve body is configured to selectively open and close the bottom passage of the pump body;

[0026] a drive assembly, wherein the drive assembly has a liquid taking passage, and the head cap is mounted on the top of the drive assembly;

[0027] a piston, wherein the piston is drivingly sleeved on the bottom of the drive assembly and is movably mounted in the pump cavity of the pump body, and the piston is configured to selectively allow and prevent the liquid taking passage of the drive assembly from communicating with the pump cavity of the pump body; and

[0028] a resilient return tube, wherein the resilient return tube is sleeved on the top of the drive assembly, the bottom of the resilient return tube is fixed relative to the pump body, and the top of the resilient return tube sealingly abuts against the head cap, wherein the inner wall of the resilient return tube sealingly abuts against the drive assembly to form a space-variable return cavity between the resilient return tube and the drive assembly, and the liquid taking passage of the drive assembly and the head cap passage of the head cap respectively communicate with the return cavity.

[0029] According to another aspect of the present application, the present application further provides a resilient return tube, which comprises a first ring body, a second ring body, a third ring body, a first bellows, a second bellows and an abutting ring, the first ring body, the second ring body and the third ring body are arranged at intervals along the height direction, the first bellows extends downward from the inner side of the second ring body to the first ring body, the second bellows extends upward from the inner side of the second ring body to the third ring body, and the abutting ring extends downward from the inner side of the second ring body, and there is a gap between the abutting ring and the first bellows.

[0030] According to an embodiment of the present application, the height dimension of the first bellows is smaller than the height dimension of the second bellows.

[0031] According to an embodiment of the present application, the resilient return tube is blow molded by a blow molding process using PE material. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is a cross-sectional view of a lotion bottle according to a preferred embodiment of the present application.

[0033] Figure 2 is a perspective view of a return lotion pump of the lotion bottle according to the above preferred embodiment of the present application.

[0034] Figure 3 is a cross-sectional view of the return lotion pump of the lotion bottle according to the above preferred embodiment of the present application.

[0035] Figure 4 is Figure 3 a partial enlarged view of the local position.

[0036] Figure 5 is an exploded view of the back-suction lotion pump of the lotion bottle according to the above preferred embodiment of the present utility model from one perspective.

[0037] Figure 6 is an exploded view of the back-suction lotion pump of the lotion bottle according to the above preferred embodiment of the present utility model from another perspective.

[0038] Figure 7 is a perspective view of the elastic return tube of the back-suction lotion pump of the lotion bottle according to the above preferred embodiment of the present utility model from one perspective.

[0039] Figure 8 is an exploded view of the elastic return tube of the back-suction lotion pump of the lotion bottle according to the above preferred embodiment of the present utility model from another perspective.

[0040] Figure 9 is a sectional view of the elastic return tube of the back-suction lotion pump of the lotion bottle according to the above preferred embodiment of the present utility model.

[0041] Figure 10 is a sectional view of one of the working processes of the back-suction lotion pump of the lotion bottle according to the above preferred embodiment of the present utility model.

[0042] Figure 11 is a sectional view of the second working process of the back-suction lotion pump of the lotion bottle according to the above preferred embodiment of the present utility model.

[0043] Figure 12 is a sectional view of the third working process of the back-suction lotion pump of the lotion bottle according to the above preferred embodiment of the present utility model.

[0044] Figure 13 is a sectional view of the fourth working process of the back-suction lotion pump of the lotion bottle according to the above preferred embodiment of the present utility model.

[0045] Figure 14 is a sectional view of the fifth working process of the back-suction lotion pump of the lotion bottle according to the above preferred embodiment of the present utility model.

[0046] Figure 15 is a sectional view of a variant example of the back-suction lotion pump of the lotion bottle according to the above preferred embodiment of the present utility model. DETAILED DESCRIPTION

[0047] Before any embodiments of the present application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the following drawings. The application is capable of other embodiments and of being practiced or being carried out in various ways. Also, it is to be understood that the phraseology and terminology used herein is for the purpose of description and should not be regarded as limiting. The use of "including," "comprising," or "having" and variations thereof herein is meant to encompass the items listed thereafter and equivalents thereof as well as additional items. Unless specified or limited otherwise, the terms "mounted," "connected," "supported," and "coupled" and variations thereof are used broadly and encompass both direct and indirect mountings, connections, supports, and couplings. Further, "connected" and "coupled" are not restricted to physical or mechanical connections or couplings.

[0048] Also, in the disclosure of the present application, the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore the above terms cannot be understood as limiting the present application; secondly, the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of one element can be one, and in another embodiment, the number of the element can be multiple, and the term "one" cannot be understood as limiting the number.

[0049] Reference is made to the drawings of the present application Figures 1 to 14 A lotion bottle according to a preferred embodiment of the present application will be disclosed and described in the following description, wherein the lotion bottle comprises a bottle body 10 and a suction lotion pump 20, the bottle body 10 is used for containing fluid such as lotion, and the suction lotion pump 20 is used for pumping out the fluid such as lotion contained in the bottle body 10.

[0050] Specifically, the suction lotion pump 20 comprises a pump body 21, a valve body 22, a driving assembly 23, a piston 24, a head cap 25, and an elastic return tube 26, and the suction lotion pump 20 has a space-variable suction cavity 200.

[0051] More specifically, the pump body 21 has a pump cavity 211 and a bottom passage 212 communicating with the pump cavity 211. The valve body 22 is arranged for selectively opening and closing the bottom passage 212 of the pump body 21, wherein when the valve body 22 opens the bottom passage 212 of the pump body 21, the fluid such as emulsion contained in the bottle body 10 is allowed to enter the pump cavity 211 through the bottom passage 212 of the pump body 21, and when the valve body 22 closes the bottom passage 212 of the pump body 21, the fluid such as emulsion contained in the bottle body 10 is prevented from entering the pump cavity 211 through the bottom passage 212 of the pump body 21.

[0052] In the drawings: Figures 1 to 14 In this specific example of the emulsion pump of the present application, the valve body 22 is a ball valve, which is movably arranged at the bottom of the pump cavity 211 of the pump body 21, wherein when the valve body 22 is moved upwardly so that there is a gap between the outer wall of the valve body 22 and the inner wall of the pump body 21, the valve body 22 opens the bottom passage 212 of the pump body 21 to allow the fluid such as emulsion contained in the bottle body 10 to enter the pump cavity 211 through the bottom passage 212 of the pump body 21, and when the valve body 22 is moved downwardly so that the outer wall of the valve body 22 is in contact with the inner wall of the pump body 21, the valve body 22 closes the bottom passage 212 of the pump body 21 to prevent the fluid such as emulsion contained in the bottle body 10 from entering the pump cavity 211 through the bottom passage 212 of the pump body 21.

[0053] Alternatively, in other examples of the emulsion pump of the present application, the valve body 22 can be a valve flap, which is deformably arranged at the bottom of the pump cavity 211 of the pump body 21, wherein when the valve body 22 is deformed upwardly, the valve body 22 opens the bottom passage 212 of the pump body 21 to allow the fluid such as emulsion contained in the bottle body 10 to enter the pump cavity 211 through the bottom passage 212 of the pump body 21, and when the valve body 22 is deformed downwardly, the valve body 22 closes the bottom passage 212 of the pump body 21 to prevent the fluid such as emulsion contained in the bottle body 10 from entering the pump cavity 211 through the bottom passage 212 of the pump body 21.

[0054] The driving assembly 23 has a liquid taking passage 231, the piston 24 is drivingly sleeved at the bottom of the driving assembly 23 and is movably installed in the pump cavity 211 of the pump body 21, and the piston 24 is arranged for selectively allowing and preventing the liquid taking passage 231 of the driving assembly 23 from communicating with the pump cavity 211 of the pump body 21. It can be understood that the peripheral wall of the piston 24 is in abutment with the inner wall of the pump body 21. When the driving assembly 23 moves downward relative to the piston 24, the piston 24 allows the liquid taking passage 231 of the driving assembly 23 to communicate with the pump cavity 211 of the pump body 21, and during the process that the driving assembly 23 drives the piston 24 to move downward in the pump cavity 211 of the pump body 21, the piston 24 always allows the liquid taking passage 231 of the driving assembly 23 to communicate with the pump cavity 211 of the pump body 21. When the driving assembly 23 moves upward relative to the piston 24, the piston 24 prevents the liquid taking passage 231 of the driving assembly 23 from communicating with the pump cavity 211 of the pump body 21, and during the process that the driving assembly 23 drives the piston 24 to move upward in the pump cavity 211 of the pump body 21, the piston 24 always prevents the liquid taking passage 231 of the driving assembly 23 from communicating with the pump cavity 211 of the pump body 21.

[0055] The head cap 25 has a head cap passage 251, and the head cap 25 is installed at the top of the driving assembly 23, so that the head cap 25 and the driving assembly 23 are combined as a whole. A user can move the driving assembly 23 downward relative to the pump body 21 by pressing the head cap 25, and during the process that the head cap 25 and the driving assembly 23 move downward relative to the pump body 21, the driving assembly 23 drives the piston 24 to move downward in the pump cavity 211 of the pump body 21.

[0056] The elastic return tube 26 is a tube body having only one upper opening 2601 and one lower opening 2602, and is sleeved on the top of the driving assembly 23. The bottom of the elastic return tube 26 is fixed relative to the pump body 21, and the top of the elastic return tube 26 is sealingly abutted against the head cap 25, i.e. the upper opening 2601 of the elastic return tube 26 is closed by the head cap 25, and the inner wall of the elastic return tube 26 is sealingly fitted on the driving assembly 23. Thus, the back-suction lotion pump 20 forms the back-suction cavity 200 between the elastic return tube 26 and the driving assembly 23, and the liquid-taking passage 231 of the driving assembly 23 and the head cap passage 251 of the head cap 25 are respectively communicated with the back-suction cavity 200 of the back-suction lotion pump 20. That is, when the piston 24 allows the liquid-taking passage 231 of the driving assembly 23 to be communicated with the pump cavity 211 of the pump body 21, the pump cavity 211 of the pump body 21, the liquid-taking passage 231 of the driving assembly 23, the back-suction cavity 200 of the back-suction lotion pump 20 and the head cap passage 251 of the head cap 25 are sequentially communicated to allow the fluid such as lotion in the pump cavity 211 of the pump body 21 to be discharged.

[0057] Reference is made to the accompanying drawings Figures 10 to 14In the first stage of the user pressing the head cap 25, the head cap 25 and the drive assembly 23 move downward relative to the pump body 21 and the piston 24, at this time the piston 24 switches from the state of preventing the liquid taking passage 231 of the drive assembly 23 from communicating with the pump cavity 211 of the pump body 21 to the state of allowing the liquid taking passage 231 of the drive assembly 23 to communicate with the pump cavity 211 of the pump body 21, and the elastic return tube 26 is compressed in the height direction to accumulate elastic potential energy. In the second stage of the user pressing the head cap 25, the head cap 25 and the drive assembly 23 move further downward relative to the pump body 21, in the process, the drive assembly 23 drives the piston 24 to move downward in the pump cavity 211 of the pump body 21, the elastic return tube 26 is further compressed in the height direction to continue accumulating elastic potential energy, the space of the back suction cavity 200 of the back suction emulsion pump 20 becomes smaller, and at the same time, since the valve body 22 is kept in the state of closing the bottom passage 212 of the pump body 21, the emulsion or the like in the pump cavity 211 of the pump body 21 is allowed to be discharged through the liquid taking passage 231 of the drive assembly 23, the back suction cavity 200 of the back suction emulsion pump 20, and the head cap passage 251 of the head cap 25. In the first stage of the user releasing the head cap 25, the elastic return tube 26 pushes the head cap 25 and the drive assembly 23 to move upward relative to the pump body 21 and the piston 24 in the process of returning to the initial state, at this time the piston 24 switches from the state of allowing the liquid taking passage 231 of the drive assembly 23 to communicate with the pump cavity 211 of the pump body 21 to the state of preventing the liquid taking passage 231 of the drive assembly 23 from communicating with the pump cavity 211 of the pump body 21. In the second stage of the user releasing the head cap 25, the elastic return tube 26 further pushes the head cap 25 and the drive assembly 23 to move upward relative to the pump body 21 in the process of returning to the initial state, in the process, the drive assembly 23 drives the piston 24 to move upward in the pump cavity 211 of the pump body 21, the space of the back suction cavity 200 of the back suction emulsion pump 20 becomes larger to form a negative pressure environment to suck back the emulsion or the like remaining in the head cap passage 251 of the head cap 25 to avoid dripping, and at the same time, since the pump cavity 211 of the pump body 21 forms a negative pressure environment, the valve body 22 opens the bottom passage 212 of the pump body 21 to allow the emulsion or the like contained in the bottle body 10 to enter the pump cavity 211 through the bottom passage 212 of the pump body 21, and after the pressure in the pump cavity 211 of the pump body 21 and the pressure in the bottle body 10 return to balance, the valve body 22 closes the bottom passage 212 of the pump body 21 again.

[0058] That is, in the emulsion bottle, the elastic reset tube 26 can not only provide a restoring force for resetting the driving assembly 23, the piston 24 and the head cap 25, but also can form the back-suction cavity 200 of the back-suction emulsion pump 20 between the elastic reset tube 26 and the driving assembly 23, so as to form a negative pressure environment during the resetting of the driving assembly 23, the piston 24 and the head cap 25, and to suck back the emulsion or other fluid remaining in the head cap channel 251 of the head cap 25, so that no emulsion or other fluid is left in the head cap channel 251 of the head cap 25 after the resetting of the driving assembly 23, the piston 24 and the head cap 25, thereby avoiding the dripping of the emulsion or other fluid from the emulsion bottle, and compared with the emulsion pump with the back-suction function in the prior art, the back-suction emulsion pump 20 of the emulsion bottle does not need to be provided with a special component, so that the back-suction emulsion pump 20 of the emulsion bottle has a simpler structure and a lower cost, and will not affect the hand feeling of a user when pressing the back-suction emulsion pump 20.

[0059] With reference to the accompanying drawings Figures 3 to 6The driving assembly 23 comprises a piston seat 232 and a driving rod 233. The piston seat 232 comprises a seat body 2321 and an assembly rod 2322, the assembly rod 2322 extends upward from the seat body 2321, for example, in a specific example of the lotion bottle of the utility model, the assembly rod 2322 can extend upward integrally from the middle of the seat body 2321, that is, the seat body 2321 and the assembly rod 2322 can be an integral structure, and the central axis of the seat body 2321 and the central axis of the assembly rod 2322 coincide, wherein the assembly rod 2322 has a first rod body passage 23221. The driving rod 233 comprises a connecting rod 2331 and a driving arm 2332, the driving arm 2332 extends outward from the bottom of the connecting rod 2331, for example, in a specific example of the lotion bottle of the utility model, the driving arm 2332 can extend outward integrally from the bottom of the connecting rod 2331, that is, the connecting rod 2331 and the driving arm 2332 can be an integral structure, wherein the connecting rod 2331 has a second rod body passage 23311. The piston 24 has a piston perforation 241, the inner diameter size of the piston 24 is smaller than the outer diameter size of the seat body 2321 and the outer diameter size of the driving arm 2332, and the inner diameter size of the piston 24 is greater than the outer diameter size of the assembly rod 2322, wherein the top of the assembly rod 2322 is fixedly assembled to the connecting rod 2331 after passing through the piston perforation 241 of the piston 24, the distance size between the seat body 2321 and the driving arm 2332 is greater than the height size of the piston 24, so that the piston 24 is drivingly installed at the bottom of the driving assembly 23, and the first rod body passage 23221 of the assembly rod 2322 and the second rod body passage 23311 of the connecting rod 2331 are communicated to form the liquid taking passage 231 of the driving assembly 23.

[0060] In the initial position, the bottom of the piston 24 and the seat body 2321 of the piston seat 232 are in contact, at this time the piston 24 prevents the liquid taking channel 231 of the drive assembly 23 from communicating with the pump cavity 211 of the pump body 21. In the first stage of the user pressing the head cap 25, the bottom of the piston 24 is away from the seat body 2321 of the piston seat 232 and the top of the piston 24 is in contact with the driving arm 2332 of the drive rod 233, at this time the piston 24 allows the liquid taking channel 231 of the drive assembly 23 to communicate with the pump cavity 211 of the pump body 21. In the second stage of the user pressing the head cap 25, the driving arm 2332 of the drive rod 233 drives the piston 24 to move downward in the pump cavity 211 of the pump body 21, while the piston 24 always allows the liquid taking channel 231 of the drive assembly 23 to communicate with the pump cavity 211 of the pump body 21. In the first stage of the user releasing the head cap 25, the top of the piston 24 is away from the driving arm 2332 of the drive rod 233 and the bottom of the piston 24 is in contact with the seat body 2321 of the piston seat 232, at this time the piston 24 prevents the liquid taking channel 231 of the drive assembly 23 from communicating with the pump cavity 211 of the pump body 21. In the second stage of the user releasing the head cap 25, the seat body 2321 of the piston seat 232 drives the piston 24 to move upward in the pump cavity 211 of the pump body 21, while the piston 24 always remains in the state of preventing the liquid taking channel 231 of the drive assembly 23 from communicating with the pump cavity 211 of the pump body 21.

[0061] Optionally, in other examples of the emulsion bottle of the present application, the inner diameter of the piston 24 is equal to the outer diameter of the assembly rod 2322, so that the inner wall of the piston 24 and the outer wall of the assembly rod 2322 can be in contact with each other, when the piston 24 moves to the position where the first rod passage 23221 of the assembly rod 2322 is exposed, the piston 24 allows the liquid taking channel 231 of the drive assembly 23 to communicate with the pump cavity 211 of the pump body 21, when the piston 24 moves to the position where the first rod passage 23221 of the assembly rod 2322 is blocked, the piston 24 prevents the liquid taking channel 231 of the drive assembly 23 from communicating with the pump cavity 211 of the pump body 21.

[0062] It is worth mentioning that the fixed assembly mode of the top of the assembly rod 2322 of the piston seat 232 and the connecting rod 2331 of the drive rod 233 is not limited in the emulsion bottle of the present application. For example, in this specific example of the emulsion bottle of the present application, referring to the attachedFigures 3 to 6 The top of the assembling rod 2322 is inserted into the second rod channel 23311 of the connecting rod 2331, and the top of the assembling rod 2322 is fixedly assembled in the connecting rod 2331 based on the friction force generated between the outer wall of the assembling rod 2322 and the inner wall of the connecting rod 2331.

[0063] Referring to the accompanying drawings Figure 3 The head cap 25 has an insertion hole 252, and the top of the connecting rod 2331 is inserted into the insertion hole 252 of the head cap 25 to mount the head cap 25 on the top of the connecting rod 2331, thereby mounting the head cap 25 on the top of the driving assembly 23.

[0064] Referring to the accompanying drawings Figure 3 And Figure 4 The inner wall of the elastic reset tube 26 is sealingly attached to the peripheral wall of the connecting rod 2331 of the driving rod 233 to form the back suction cavity 200 between the elastic reset tube 26 and the connecting rod 2331 of the driving rod 233. The inner wall of the elastic reset tube 26 and the peripheral wall of the connecting rod 2331 can always be sealed during the movement of the driving assembly 23 relative to the pump body 21, so that the leakage of the fluid such as milk liquid into the back suction cavity 200 can be avoided during the downward movement of the driving assembly 23, the piston 24 and the head cap 25 caused by pressing the head cap 25. During the reset of the driving assembly 23, the piston 24 and the head cap 25, the back suction cavity 200 formed between the elastic reset tube 26 and the connecting rod 2331 can form a negative pressure environment to suck the fluid such as milk liquid remaining in the head cap channel 251 of the head cap 25, thereby avoiding the dripping of the fluid such as milk liquid from the milk bottle.

[0065] Continuing to refer to the accompanying drawings Figure 3 , Figure 5 , Figure 6 , Figures 10 to 14The first rod body passage 23221 of the assembly rod 2322 of the piston seat 232 has a first longitudinal extension part 232211 and a first transverse extension part 232212, the first longitudinal extension part 232211 extends from the end face of the top of the assembly rod 2322 to the bottom of the assembly rod 2322 (i.e. the end of the assembly rod 2322 for connecting the seat body 2321), and the first transverse extension part 232212 extends from the first longitudinal extension part 232211 to the peripheral wall of the assembly rod 2322, so that the opening of the first rod body passage 23221 formed by the peripheral wall of the assembly rod 2322 is adjacent to the seat body 2321, and when the bottom of the piston 24 is attached to the seat body 2321, the piston 24 can prevent the liquid taking passage 231 of the drive assembly 23 from communicating with the pump cavity 211 of the pump body 21.

[0066] The second rod body passage 23311 of the connecting rod 2331 of the drive rod 233 has a second longitudinal extension part 233111 and a second transverse extension part 233112, the second longitudinal extension part 233111 extends from the end face of the bottom of the connecting rod 2331 to the top, and the second transverse extension part 233112 extends from the top of the second longitudinal extension part 233111 to the peripheral wall of the connecting rod 2331, so that after the assembly rod 2322 of the top extends into the second rod body passage 23311 of the connecting rod 2331, the first rod body passage 23221 of the assembly rod 2322 and the second rod body passage 23311 of the connecting rod 2331 communicate to form the liquid taking passage 231 of the drive assembly 23, and the liquid taking passage 231 of the drive assembly 23 can communicate with the back suction cavity 200 formed between the connecting rod 2331 and the elastic reset tube 26. In addition, since the second transverse extension part 233112 of the connecting rod 2331 is located at the top of the connecting rod 2331, after pressing the head cap 25 to allow the head cap 25 and the drive assembly 23 to move downward, the liquid taking passage 231 of the drive assembly 23 can always communicate with the back suction cavity 200 of the back suction emulsion pump 20.

[0067] Reference is made to the accompanying drawings Figure 3 , Figure 5 and Figure 6The back-suction emulsion pump 20 further comprises a pump plug 27, the pump plug 27 has a pump plug through hole 271, the inner diameter size of the pump plug 27 is greater than the outer diameter size of the connecting rod 2331 of the driving rod 233 and is less than the outer diameter size of the driving arm 2332. The pump plug 27 is fixedly installed in the pump cavity 211 of the pump body 21, for example, based on the friction force generated between the outer wall of the pump plug 27 and the inner wall of the pump body 21, the pump plug 27 can be fixedly installed in the pump cavity 211 of the pump body 21, the top of the connecting rod 2331 passes through the pump plug through hole 271 of the pump plug 27, and because the inner diameter size of the pump plug 27 is less than the outer diameter size of the driving arm 2332, the pump plug 27 can prevent the driving assembly 23 from falling out of the pump cavity 211 of the pump body 21, so as to ensure the stability and reliability of the back-suction emulsion pump 20. The bottom of the elastic reset tube 26 abuts against the pump plug 27, so that the bottom of the elastic reset tube 26 is kept stationary relative to the pump body 21.

[0068] Preferably, the pump plug 27 is fixedly installed in the middle of the pump cavity 211 of the pump body 21, so that the bottom of the elastic reset tube 26 can sink into the pump cavity 211 of the pump body 21, which is beneficial to reduce the height of the back-suction emulsion pump 20 and hide the elastic reset tube 26.

[0069] With reference to the accompanying drawings Figures 1 to 3 , Figure 5 and Figure 6 , the back-suction emulsion pump 20 further comprises a cover 28, the cover 28 is detachably installed on the top of the pump body 21, wherein the cover 28 can be installed on the rim of the bottle body 10, so as to install the back-suction emulsion pump 20 on the bottle body 10. In one specific example of the emulsion bottle, the cover 28 can be screwed on the rim of the bottle body 10.

[0070] With reference to the accompanying drawings Figures 1 to 3 , Figure 5 and Figure 6 , the back-suction emulsion pump 20 further comprises a suction pipe 29, one end of the suction pipe 29 is inserted into the bottom of the pump body 21, and the lumen of the suction pipe 29 can be communicated with the bottom passage 212 of the pump body 21, so that the suction pipe 29 can extend to the bottom of the bottle body 10 after the back-suction emulsion pump 20 is installed on the bottle body 10.

[0071] With reference to the accompanying drawings Figures 3 to 9The elastic return tube 26 includes a first ring body 261, a second ring body 262, a third ring body 263, a first bellows 264, a second bellows 265, and a fitting ring 266. The first ring body 261, the second ring body 262, and the third ring body 263 are spaced apart from each other in the height direction. The first bellows 264 extends downward from the inner side of the second ring body 262 to the first ring body 261. For example, the first bellows 264 can extend downward from the inner side of the second ring body 262 to the inner side of the first ring body 261. The second bellows 265 extends upward from the inner side of the second ring body 262 to the third ring body 263. For example, the second bellows 264 can extend upward from the inner side of the second ring body 262 to the inner side of the third ring body 263. The fitting ring 266 extends downward from the inner side of the second ring body 262. Thus, there is a gap between the fitting ring 266 and the first bellows 264.

[0072] The first ring body 261 forms the bottom of the elastic return tube 26, and defines the lower opening 2602 of the elastic return tube 26. The first ring body 261 abuts against the pump plug 27, so that the bottom of the elastic return tube 26 abuts against the pump plug 27. The third ring body 263 forms the top of the elastic return tube 26, and defines the upper opening 2601 of the elastic return tube 26. The third ring body 263 abuts against the head cap 25. The fitting ring 266 is fitted to the peripheral wall of the connecting rod 2331 in a manner of being bound to the connecting rod 2331. Thus, the returnable emulsion pump 20 forms the returnable cavity 200 between the elastic return tube 26 and the connecting rod 2331. That is, the inner diameter of the fitting ring 266 is slightly smaller than the outer diameter of the connecting rod 2331. After the fitting ring 266 is fitted to the connecting rod 2331, the fitting ring 266 provides a binding force for binding to the connecting rod 2331. Thus, there is no gap between the fitting surface 2661 of the fitting ring 266 and the peripheral wall of the connecting rod 2331, so that the inner wall of the elastic return tube 26 is sealingly fitted to the peripheral wall of the connecting rod 2331.

[0073] When the head cap 25 is pressed to drive the driving assembly 23 and the piston 24 to move downward, the head cap 25 compresses the elastic return tube 26 toward the pump plug 27, so that the first bellows 264 and the second bellows 265 of the elastic return tube 26 are deformed in the height direction to allow the elastic return tube 26 to accumulate elastic potential energy. In this process, the first ring 261, the second ring 262, and the third ring 263 prevent the elastic return tube 26 from expanding outward, thereby avoiding a gap between the abutting surface 2661 of the abutting ring 266 and the peripheral wall of the connecting rod 2331, preventing fluid such as milk from leaking into the suction cavity 200 of the suction milk pump 20, and ensuring that the elastic return tube 26 provides sufficient restoring force. At the same time, by providing a gap between the abutting ring 266 and the first bellows 264, the abutting ring 266 can be slightly deformed toward the first bellows 264, ensuring the sealing between the abutting surface 2661 of the abutting ring 266 and the peripheral wall of the connecting rod 2331 based on the abutting ring 266 being bound to the connecting rod 2331. That is, the abutting ring 266 and the connecting rod 2331 are in surface-to-surface abutment. When the head cap 25 is released, the first bellows 264 and the second bellows 265 restore the elastic return tube 26 to the initial state in the stretching process, and the elastic return tube 26 pushes the driving assembly 23, the piston 24, and the head cap 25 to move upward to reset.

[0074] Whether the head cap 25 is pressed or released, the abutting ring 266 of the elastic return tube 26 abuts the peripheral wall of the connecting rod 2331, which not only prevents fluid such as milk from leaking into the suction cavity 200 when the driving assembly 23, the piston 24, and the head cap 25 move downward, but also forms a negative pressure environment in the suction cavity 200 between the elastic return tube 26 and the connecting rod 2331 when the driving assembly 23, the piston 24, and the head cap 25 reset, to suck the fluid such as milk remaining in the head cap passage 251 of the head cap 25 to prevent dripping.

[0075] In addition, when the head cap 25 is pressed to drive the driving assembly 23 and the piston 24 to move downward, the head cap 25 compresses the first bellows 264 and the second bellows 265 towards the pump plug 27, and the first bellows 264 and the second bellows 265 can be compressed and deformed. In this way, the elastic reset tube 26 has sufficient elasticity to drive the driving assembly 23, the piston 24 and the head cap 25 to reset on the basis of the reduced height dimension of the elastic reset tube 26.

[0076] Preferably, the height dimension of the first bellows 264 is smaller than the height dimension of the second bellows 265, so that the back suction cavity 200 of the back suction emulsion pump 20 has a larger height dimension. In this way, on the one hand, the liquid taking passage 231 of the driving assembly 23 can be ensured to be always communicated with the back suction cavity 200 during the process of pressing the head cap 25 to drive the head cap 25 and the driving assembly 23 to move downward, and on the other hand, the negative pressure of the back suction cavity 200 of the back suction emulsion pump 20 can be greater during the process of resetting the head cap 25, the driving assembly 23 and the piston 24, so as to ensure that the emulsion and other fluids remaining in the head cap passage 251 of the head cap 25 are back sucked to the back suction cavity 200, avoiding the situation that the emulsion and other fluids of the emulsion bottle drip.

[0077] In the specific example of the emulsion bottle of the utility model shown in the drawings, Figures 1 to 14 In this specific example of the emulsion bottle of the utility model shown in the drawings, the elastic reset tube 26 is formed by a blow molding process of a polyethylene (PE) material, so as to be shaped and have appropriate elasticity.

[0078] Preferably, the first ring body 261 of the elastic reset tube 26 is sealingly abutted against the pump plug 27, and the third ring body 263 is sealingly abutted against the head cap 25. In this way, the emulsion and other fluids entering the back suction cavity 200 of the back suction emulsion pump 20 are prevented from leaking. Preferably, the middle part of the third ring body 263 of the elastic reset tube 26 has an annular boss 2631 extending upward, the head cap 25 has an annular groove 253, the annular boss 2631 is inserted into the annular groove 253 of the head cap 25, and the annular boss 2631 and the inner wall of the head cap 25 for forming the annular groove 253 are mutually fitted, so that the third ring body 263 is sealingly abutted against the head cap 25.

[0079] Continuing to refer to the drawings, Figure 3The head cap 25 has a shielding ring 254 extending downward, which is located outside the elastic reset tube 26 and can extend to the pump cavity 211 of the pump body 21 through the cap perforation 281 of the cap 28, so that the elastic reset tube 26 can be hidden to protect the elastic reset tube 26.

[0080] Reference is made to the accompanying drawings Figures 10 to 14 Reference is made to the accompanying drawings Figure 1 The specific process of pumping the fluid such as lotion contained in the bottle body 10 by the back-suction lotion pump 20 is as follows:

[0081] As shown in the accompanying drawings Figure 10 and Figure 11 When the user starts to press the head cap 25, the head cap 25 and the drive assembly 23 move downward relative to the pump body 21 and the piston 24 due to the large friction between the peripheral wall of the piston 24 and the inner wall of the pump body 21, the bottom of the piston 24 is separated from the seat body 2321 of the piston seat 232 and the top of the piston 24 is attached to the driving arm 2332 of the driving rod 233, at this time, the piston 24 allows the liquid taking passage 231 of the drive assembly 23 to communicate with the pump cavity 211 of the pump body 21, so that the pump cavity 211 of the pump body 21, the liquid taking passage 231 of the drive assembly 23, the back-suction cavity 200 of the back-suction lotion pump 20 and the head cap passage 251 of the head cap 25 are sequentially communicated, the head cap 25 compresses the elastic reset tube 26 towards the pump plug 27, the elastic reset tube 26 is deformed in the height direction to accumulate elastic potential energy, and the valve body 22 remains in the position of closing the bottom passage 212 of the pump body 21.

[0082] As shown in the accompanying drawings Figure 12 When the user continues to press the head cap 25, the head cap 25, the drive assembly 23 and the piston 24 move downward relative to the pump body 21, the valve body 22 remains in the position of closing the bottom passage 212 of the pump body 21, the fluid such as lotion in the pump cavity 211 of the pump body 21 is sequentially discharged through the pump cavity 211 of the pump body 21, the liquid taking passage 231 of the drive assembly 23, the back-suction cavity 200 of the back-suction lotion pump 20 and the head cap passage 251 of the head cap 25, the head cap 25 continues to compress the elastic reset tube 26 towards the pump plug 27, the elastic reset tube 26 is deformed in the height direction to accumulate elastic potential energy, and the space of the back-suction cavity 200 of the back-suction lotion pump 20 formed between the elastic reset tube 26 and the connecting rod 2331 is reduced.

[0083] As shown in the accompanying drawings Figure 13As shown, due to the large friction between the peripheral wall of the piston 24 and the inner wall of the pump body 21, after the user releases the head cap 25, the elastic reset tube 26 pushes the head cap 25 and the driving assembly 23 to move upward relative to the pump body 21 and the piston 24 in the process of restoring the initial state, the top of the piston 24 is away from the driving arm 2332 of the driving rod 233 and the bottom of the piston 24 is attached to the seat body 2321 of the piston seat 232, at this time, the piston 24 prevents the liquid taking passage 231 of the driving assembly 23 from communicating with the pump cavity 211 of the pump body 21.

[0084] As shown, Figure 14 As shown, the elastic reset tube 26 continues to push the head cap 25, the driving assembly 23 and the piston 24 to move upward relative to the pump body 21 in the process of restoring the initial state, on the one hand, the pump cavity 211 of the pump body 21 forms a negative pressure environment, so that the valve body 22 opens the bottom passage 212 of the pump body 21 to allow the fluid such as emulsion contained in the bottle body 10 to enter the pump cavity 211 of the pump body 21 through the bottom passage 212 of the pump body 21, after the pressure in the pump cavity 211 of the pump body 21 and the pressure in the bottle body 10 restore balance, the valve body 22 closes the bottom passage 212 of the pump body 21 again, on the other hand, the space of the back-suction cavity 200 of the back-suction emulsion pump 20 increases to form a negative pressure environment, the fluid such as emulsion remaining in the head cap passage 251 of the head cap 25 is back-sucked to the back-suction cavity 200 to avoid dripping.

[0085] As shown, Figure 15 As shown, the back-suction emulsion pump 20 of the emulsion bottle of the utility model has a deformation example, which is different from the back-suction emulsion pump 20 shown in the accompanying drawings, Figures 2 to 14 As shown, the back-suction emulsion pump 20 of the emulsion bottle of the utility model has a deformation example, which is different from the back-suction emulsion pump 20 shown in the accompanying drawings, Figure 15 As shown, the back-suction emulsion pump 20 of the emulsion bottle of the utility model has a deformation example, which is different from the back-suction emulsion pump 20 shown in the accompanying drawings, the back-suction emulsion pump 20 further comprises an auxiliary elastic member 210, the bottom of the auxiliary elastic member 210 remains unchanged relative to the pump body 21, and the top of the auxiliary elastic member 210 abuts against the head cap 25. When the user presses the head cap 25, the auxiliary elastic member 210 and the elastic reset tube 26 are compressed and deformed in the height direction to accumulate elastic potential energy, and after the user releases the head cap 25, the auxiliary elastic member 210 and the elastic reset tube 26 jointly push the head cap 25, the driving assembly 23 and the piston 24 to reset in the process of restoring the initial state, that is, the auxiliary elastic member 210 can provide auxiliary restoring force for assisting the elastic reset tube 26 to push the head cap 25 and the driving assembly 23 to move upward, which makes the back-suction emulsion pump 20 be capable of pumping viscous fluid such as emulsion.

[0086] With reference to the accompanying drawings Figure 15 In this specific example of the back-pumping 20 of the emulsion bottle, the auxiliary elastic member 210 is sleeved outside the elastic return tube 26, so that the elastic return tube 26 isolates the auxiliary elastic member 210 from the emulsion and other fluids, avoiding the auxiliary elastic member 210 from contacting the emulsion and other fluids. In this way, the emulsion bottle can not only avoid the corrosion of the auxiliary elastic member 210, but also avoid the pollution of the emulsion and other fluids.

[0087] With reference to the accompanying drawings Figure 15 The bottom of the auxiliary elastic member 210 abuts against the bottom of the first ring body 261 of the elastic return tube 26, so that the bottom of the auxiliary elastic member 210 can remain unchanged relative to the pump body 21, and the elastic return tube 26 can isolate the auxiliary elastic member 210 from the pump plug 27. The top of the auxiliary elastic member 210 abuts against the top of the third ring body 263 of the elastic return tube 26, so that the top of the auxiliary elastic member 210 abuts against the head cap 25 through the elastic return tube 26, and the elastic return tube 26 can isolate the auxiliary elastic member 210 from the head cap 25. When the user presses the head cap 25, the auxiliary elastic member 210 can be pressed by the head cap 25 towards the pump plug 27 and deformed in the height direction.

[0088] Those skilled in the art will understand that the embodiments of the present application shown in the above description and drawings are only examples and do not limit the present application. The purpose of the present application has been fully and effectively achieved. The function and structural principle of the present application have been shown and described in the embodiments, and the implementation of the present application can be any modification or change without departing from the principle.

Claims

1. A back-suction emulsion pump, characterized in that, include: Headgear, wherein the headgear has a headgear channel; A pump body, wherein the pump body has a pump chamber and a bottom channel communicating with the pump chamber; A valve body, wherein the valve body is configured to selectively open and close the bottom channel of the pump body; A drive assembly having a liquid intake channel, wherein the cap is mounted on top of the drive assembly; A piston, wherein the piston is drivably mounted on the bottom of the drive assembly and is vertically movably mounted in the pump chamber of the pump body, the piston being configured to selectively allow and prevent the liquid intake channel of the drive assembly from communicating with the pump chamber of the pump body; as well as A flexible reset tube is fitted onto the top of the drive assembly. The bottom of the flexible reset tube remains stationary relative to the pump body, and the top of the flexible reset tube is sealed against the head cap. The inner wall of the flexible reset tube is sealed against the drive assembly to form a variable-space back suction chamber between the flexible reset tube and the drive assembly. The liquid intake channel of the drive assembly and the head cap channel of the head cap are respectively connected to the back suction chamber.

2. The back-suction emulsion pump according to claim 1, wherein the drive assembly includes a piston seat and a drive rod, the piston seat includes a seat body and an assembly rod extending upward from the seat body, the assembly rod having a first rod channel, the drive rod includes a connecting rod and a drive arm extending outward from the bottom of the connecting rod, the connecting rod having a second rod channel, the piston having a piston through hole, the inner diameter of the piston being smaller than the outer diameter of the seat body and the outer diameter of the drive arm, the inner diameter of the piston being greater than or equal to the outer diameter of the bottom of the assembly rod, the top of the assembly rod being fixedly mounted to the connecting rod after passing through the piston through hole of the piston, the distance between the seat body and the drive arm being greater than the height of the piston, so as to drivably mount the piston to the bottom of the drive assembly, the first rod channel of the assembly rod and the second rod channel of the connecting rod being connected to form the liquid intake channel of the drive assembly.

3. The back-suction emulsion pump according to claim 2, wherein the bottom of the resilient reset tube is sealed against the peripheral wall of the connecting rod of the drive rod.

4. The back-suction emulsion pump according to claim 3, wherein the back-suction emulsion pump includes a pump plug having a pump plug perforation, the inner diameter of the pump plug being larger than the outer diameter of the connecting rod of the drive rod and smaller than the outer diameter of the drive arm, wherein the pump plug is fixedly mounted in the pump cavity of the pump body, the top of the connecting rod passes through the pump plug perforation of the pump plug, and the bottom of the resilient reset tube abuts against the pump plug to keep the bottom of the resilient reset tube stationary relative to the pump body.

5. The back-suction emulsion pump according to claim 4, wherein the elastic reset tube comprises a first ring, a second ring, a third ring, a first bellows, a second bellows, and a fitting ring, the first ring, the second ring, and the third ring are spaced apart from each other along the height direction, the first bellows extends downward from the inside of the second ring to the first ring, the second bellows extends upward from the inside of the second ring to the third ring, the fitting ring extends downward from the inside of the second ring, and there is a gap between the fitting ring and the first bellows, wherein the first ring abuts against the pump plug, the third ring abuts against the head cap, and the fitting ring is fitted to the peripheral wall of the connecting rod in a manner that binds it to the connecting rod.

6. The back-suction emulsion pump according to claim 5, wherein the height dimension of the first bellows is smaller than the height dimension of the second bellows.

7. The back-suction emulsion pump according to any one of claims 1 to 6, wherein the back-suction emulsion pump includes an auxiliary elastic member, the bottom of which remains unchanged relative to the pump body, and the top of which abuts against the head cap.

8. The back-suction emulsion pump according to claim 5 or 6, wherein the back-suction emulsion pump includes an auxiliary elastic member, the bottom of which abuts against the first ring body, and the top of which abuts against the second ring body.

9. The backflow emulsion pump according to any one of claims 1 to 7, wherein the backflow emulsion pump includes a cap that is snap-fitted onto the top of the pump body.

10. A lotion bottle, characterized in that, include: Bottle body; and The back-suction emulsion pump according to any one of claims 1 to 9, wherein the back-suction emulsion pump is mounted on the bottle body.

11. A resilient reset tube, characterized in that, The device includes a first ring body, a second ring body, a third ring body, a first corrugated tube, a second corrugated tube, and a fitting ring. The first ring body, the second ring body, and the third ring body are arranged at intervals along the height direction. The first corrugated tube extends downward from the inside of the second ring body to the first ring body. The second corrugated tube extends upward from the inside of the second ring body to the third ring body. The fitting ring extends downward from the inside of the second ring body, and there is a gap between the fitting ring and the first corrugated tube.

12. The elastic reset tube according to claim 11, wherein the height dimension of the first bellows is smaller than the height dimension of the second bellows.

13. The elastic reset tube according to claim 11 or 12, wherein the elastic reset tube is blow-molded from PE material using a blow molding process.

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