Hand squeeze pump

Abstract

A hand squeeze pump, comprising a container body and a piston. An accommodating cavity is formed in the container body. The piston is slidably arranged in the accommodating cavity and forms a sealing fit with the container body. The piston divides the accommodating cavity into a medium cavity and an air cavity that are not communicated with each other, the medium cavity being used for accommodating a paste medium and being communicated with a paste outlet, and the air cavity being provided with a one-way air intake valve and being communicated with the one-way air intake valve. The container body has the characteristic of elastic deformation. The paste medium is always retained in the medium cavity, and the paste medium can be squeezed out by squeezing any position of the container body. The hand squeeze pump has the advantages of simple and stable structure and convenient use.

Description

A hand squeeze pump TECHNICAL FIELD

[0001] The present application relates to the field of containers, and in particular to a hand squeeze pump. BACKGROUND

[0002] With the improvement of people's living standards, people's demand for toothpaste, hand cream, sunscreen and ointment and other life care products has also gradually increased. The aforementioned products are usually semi-solid liquids, commonly known as paste medium or paste, etc. At present, the paste medium generally adopts a hose packaging, one end of which has an outlet, and the other end is a fish tail-shaped packaging structure. By squeezing the hose, the hose deforms, and the paste medium is squeezed out of the outlet for use.

[0003] After the paste medium is reduced, the paste body will be chaotic in the tube when the hose is squeezed with one hand. Usually, it takes two hands to squeeze the paste medium near the tail end of the hose to the position near the outlet. It is not convenient to use; and as the daily use of paste medium gradually decreases, the squeezing of the remaining paste medium will also become more and more troublesome. SUMMARY

[0004] In order to improve the convenience of squeezing the paste medium out of the container, the present application provides a hand squeeze pump, which can squeeze the paste medium out of the container with only one hand, and the paste medium will not be chaotic in the container. It has the advantages of convenient use, simple structure and low cost.

[0005] The hand squeeze pump provided by the present application adopts the following technical scheme.

[0006] A hand squeeze pump comprises:

[0007] A container body having elastic deformation characteristics and an accommodation cavity formed inside;

[0008] A piston slidingly arranged in the accommodation cavity and sealingly matched with the container body, the piston separating the accommodation cavity into a medium cavity and a gas cavity that are not in communication with each other, the medium cavity being used for accommodating the paste medium, and the medium cavity being in communication with the outlet;

[0009] A one-way air inlet valve in communication with the gas cavity, the one-way air inlet valve being used for controlling the one-way entry of air into the gas cavity and blocking the escape of air from the gas cavity.

[0010] By adopting the technical scheme, the extrusion container body is located at the position of the medium cavity or the gas cavity, and the paste-like medium can be extruded from the paste outlet, and the piston corresponds to sliding in the accommodation cavity. With the reduction of the paste-like medium, the piston gradually approaches the paste outlet, so that the remaining paste-like medium is always kept in the medium cavity and cannot move randomly in the accommodation cavity. Even if the remaining paste-like medium is small, it can be extruded by one hand, and the paste-like medium can be used immediately after being extruded. The user does not need to use both hands to find the position of the paste in the container, and does not need to adjust the extrusion mode due to the change of the content of the paste-like medium. The convenience of extruding the paste-like medium is greatly improved.

[0011] Optionally, the piston has an elastic deformation characteristic.

[0012] By adopting the technical scheme, in the process of deformation of the container body, the piston deforms correspondingly to ensure the sealing between the piston and the container body, so that the paste-like medium can be normally extruded even if the user extrudes the position of the piston. The extrusion of the container body is further improved, and the convenience of use is improved.

[0013] Optionally, the piston comprises a plug body and a sealing sleeve, the sealing sleeve is sleeved on the side of the plug body and is sealingly attached to the inner wall of the accommodation cavity, one end of the sealing sleeve is connected to the plug body, and the other end extends towards the direction of the paste outlet.

[0014] By adopting the technical scheme, the sealing sleeve continuously abuts against the inner wall of the accommodation cavity to ensure the sealing of the piston, and the sealing sleeve with different extension lengths can be configured according to the characteristics of the paste-like medium to improve the adaptability of the container.

[0015] Optionally, a gap is formed between the sealing sleeve and the plug body, and the sealing sleeve has an elastic deformation characteristic.

[0016] By adopting the technical scheme, when the container body deforms under the action of external force, the sealing sleeve deforms correspondingly under the compression of the container body to keep attached to the inner wall of the medium cavity in the process of deformation and recovery of the container body, avoid forming a gap, and improve the sealing effect.

[0017] Optionally, the sealing sleeve gradually expands towards the direction of the paste outlet.

[0018] By adopting the technical scheme, the sealing sleeve has a tendency to expand outward, so that the sealing sleeve can be more stably attached to the inner wall of the accommodation cavity to improve the sealing effect.

[0019] Optionally, the plug body has an elastic deformation characteristic, and a gas collecting groove is formed on the side of the plug body facing the gas cavity, the groove opening of the gas collecting groove faces the gas cavity, and the groove bottom is located at the part of the plug body close to the medium cavity.

[0020] By adopting the technical scheme, when the container body is deforming or recovering, the gas exerts pressure on the inner wall of the gas collecting groove due to the pressure difference, which is used to push the piston to move as a whole and expand the plug body outward, so as to improve the fitting degree of the sealing sleeve and the inner wall of the accommodating cavity, further improve the sealing effect, and reduce the possibility of leakage of the paste medium.

[0021] Optionally, the piston further comprises a connecting ring having elastic deformation characteristics, the connecting ring is annular in structure, the connecting ring forms an annular connecting end located at the inner ring and an annular connecting end located at the outer ring, the annular connecting end located at the inner ring is attached to the plug body, and the annular connecting end located at the outer ring is attached to the sealing sleeve.

[0022] By adopting the technical scheme, the connector provides certain support and deformation space for the sealing sleeve by virtue of its own elastic force, further improving the deformation ability of the piston as a whole and the sealing effect of the sealing sleeve.

[0023] Optionally, a one-way medium valve is further included, the one-way medium valve is arranged at the paste outlet and communicates with the medium cavity, and the one-way medium valve is used to control the paste medium to be discharged from the medium cavity and prevent the paste medium and air from flowing back to the medium cavity.

[0024] By adopting the technical scheme, the one-way medium valve can effectively prevent the paste medium or air from flowing back into the medium cavity when the container body is loosened, and the use experience is optimized.

[0025] Optionally, the one-way medium valve comprises a valve body having elastic deformation characteristics, one end of the valve body communicates with the medium cavity, the other end of the valve body forms an opening, the valve body has two sealing surfaces at the opening, the two sealing surfaces are attached to each other to close the opening when the valve body maintains the original shape, and the valve body gradually contracts inward toward the opening.

[0026] By adopting the technical scheme, when the container body is squeezed, the paste medium pushes the two sealing surfaces apart from the inside to the outside to open the opening, and after the container body is loosened, the valve body resets under the action of its own elastic force to close the opening, thereby preventing the paste medium or air from flowing back, and the structure is simple and the reaction is rapid.

[0027] Optionally, two mutually attached sealing surfaces form a group, a plurality of groups of the sealing surfaces are arranged, the plurality of groups of the sealing surfaces are radially distributed and connected to each other, and the included angles between adjacent two groups of the sealing surfaces are the same.

[0028] By adopting the technical scheme, the plurality of groups of the sealing surfaces cooperate to open or close the opening, which not only facilitates forming a larger opening, but also reacts more rapidly, the paste medium is more convenient to squeeze out, and the non-return effect is better.

[0029] To sum up, the present application includes at least one of the following beneficial technical effects:

[0030] 1. The paste medium can be squeezed out of the paste outlet by squeezing the container body at the position of the medium cavity or the gas cavity, and the piston corresponds to sliding in the accommodation cavity. As the paste medium decreases, the piston gradually approaches the paste outlet, so that the remaining paste medium is always kept in the medium cavity and cannot move randomly in the accommodation cavity. Even if the remaining paste medium is small, it can be squeezed out with one hand, and it can be used immediately without the need to find the position of the paste in the container with both hands, and there is no need to adjust the squeezing method due to the change of the content of the paste medium, which greatly improves the convenience of squeezing the paste medium;

[0031] 2. By providing the piston with elastic deformation capability, the sealing between the piston and the container body is ensured, so that the paste medium can be normally squeezed out even if the user squeezes the position of the piston, which further improves the randomness of squeezing the container body and improves the convenience of use;

[0032] 3. With the inner wall of the gas gathering groove, the gas pushes the piston to move as a whole, and on the other hand, the plug expands outward, improving the fit of the sealing sleeve and the inner wall of the accommodation cavity, further improving the sealing effect and reducing the possibility of leakage of the paste medium. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 is a schematic diagram of the overall structure of the embodiment 1 of the present application;

[0034] Figure 2 is a cross-sectional view along A-A in Figure 1;

[0035] Figure 3 is a cross-sectional view showing other shapes of the accommodation cavity;

[0036] Figure 4 shows the piston of the embodiment 1 of the present application separately and schematically;

[0037] Figure 5 is a cross-sectional view of the piston in Figure 4;

[0038] Figure 6 shows the one-way medium valve of the embodiment 1 of the present application separately and schematically;

[0039] Figure 7 is a cross-sectional view of the one-way medium valve in Figure 6;

[0040] Figure 8 is a schematic diagram of another embodiment of the one-way medium valve of the embodiment 1 of the present application;

[0041] Figure 9 schematically shows the installation position of the one-way medium valve of the embodiment 2 of the present application;

[0042] Figure 10 shows the one-way medium valve of the embodiment 2 of the present application separately and schematically.

[0043] Reference signs: 1, container body; 11, accommodating cavity; 111, medium cavity; 112, gas cavity; 12, paste outlet; 2, piston; 21, plug body; 211, gas accumulation groove; 22, sealing sleeve; 23, connecting ring; 3, one-way air inlet valve; 4, one-way medium valve; 41, valve body; 42, opening; 43, sealing surface; 5, end cover; 6, paste outlet pipe. DETAILED DESCRIPTION

[0044] The application will be further described in detail below in combination with Figs. 1-10.

[0045] Example 1

[0046] The example 1 of the application discloses a hand squeeze pump, referring to Figs. 1 and 2, comprising a container body 1 and a piston 2, the container body 1 is internally formed with an accommodating cavity 11, the piston 2 is slidingly arranged in the accommodating cavity 11, the piston 2 is in abutment with the inner side wall of the accommodating cavity 11 and forms a sealing fit with the container body 1.

[0047] The piston 2 divides the accommodating cavity 11 into a medium cavity 111 and a gas cavity 112 which are not in communication with each other, and the size of the medium cavity 111 and the gas cavity 112 changes correspondingly with the sliding of the piston 2 in the accommodating cavity 11. The medium cavity 111 is used for accommodating paste-like medium and is in communication with a paste outlet 12. The gas cavity 112 is provided with a one-way air inlet valve 3 and is in communication therewith, the one-way air inlet valve 3 is used for controlling the one-way entry of air into the gas cavity 112 and preventing the air from escaping outward from the gas cavity 112.

[0048] Meanwhile, the container body 1 has the elastic deformation characteristic. The elastic deformation refers to that under the action of external force, the object deforms, and when the external force is removed, the object can restore to the original state. That is to say, the container body 1 can withstand the extrusion of external force, shrink and deform to extrude the paste-like medium in the medium cavity 111 from the paste outlet 12, and restore to the original shape of the container body 1 after the external force is removed.

[0049] The aforementioned container body 1 with the elastic deformation characteristic can adopt, but is not limited to, elastic body materials such as rubber and plastic or composite materials with elastic deformation ability such as carbon fiber reinforced plastic, but the specific material of the container body 1 is not limited in the application.

[0050] It should be noted that when the amount of the paste-like medium accommodated in the medium cavity 111 is different, the position of the piston 2 in the accommodating cavity 11 is different. Therefore, when the container body 1 is extruded, it is possible to extrude the part of the container body 1 located in the medium cavity 111, and it is also possible to extrude the part of the container body 1 located in the gas cavity 112, both of which can extrude the paste-like medium, but the extrusion process is slightly different. The following is classified and described:

[0051] When the container body 1 has more paste medium, the piston 2 is located at the side of the accommodating cavity 11 away from the paste outlet 12, and the medium cavity 111 occupies most of the accommodating cavity 11. In this case, the part of the container body 1 located in the medium cavity 111 is more easily squeezed. When squeezed, the paste medium is squeezed out of the paste outlet 12 under the action of an external force, and at the same time, the medium cavity 111 shrinks. After the container body 1 is released, the container body 1 begins to recover, and the medium cavity 111 expands. However, due to the decrease in the internal medium, a negative pressure is formed in the medium cavity 111, and a pressure difference is formed between the medium cavity 111 and the gas cavity 112. Under the action of air pressure, the piston 2 is forced to slide towards the paste outlet 12 to reduce the medium cavity 111, and at the same time, gas enters the gas cavity 112 through the one-way air inlet valve until the container body 1 fully recovers, and the medium cavity 111, the gas cavity 112 and the atmosphere are in pressure balance.

[0052] With daily use, the paste medium in the container body 1 gradually decreases. When the paste medium content is small, the piston 2 is located at the side of the accommodating cavity 11 close to the paste outlet 12, and the gas cavity 112 occupies most of the accommodating cavity 11. In this case, the part of the container body 1 located in the gas cavity 112 is more easily squeezed. When squeezed, the gas cavity 112 shrinks, and the internal pressure increases (under the action of the one-way air valve, the air in the gas cavity 112 cannot escape). A pressure difference is formed between the gas cavity 112 and the medium cavity 111. Due to the existence of the pressure difference, the gas cavity 112 has a tendency to expand, thereby pushing the piston 2 to slide towards the paste outlet 12 to squeeze the paste medium in the medium cavity 111 out of the paste outlet 12. After being released, the container body 1 begins to recover, the gas cavity 112 expands, the internal pressure decreases, and air enters the gas cavity 112 through the one-way air valve to balance the internal and external pressure difference until the container body 1 fully recovers.

[0053] In summary, the paste medium can be squeezed out of the paste outlet 12 by squeezing any position of the container body 1, and during the squeezing process, the paste medium is always kept in the medium cavity 111, i.e. always kept at the position close to the paste outlet 12 in the accommodating cavity 11, and will not move arbitrarily in the accommodating cavity 11. Even if the remaining paste medium is small, it can be squeezed out by one hand, greatly improving the convenience of squeezing the paste medium.

[0054] It is further stated that the aforementioned paste medium can be but is not limited to toothpaste, hand cream, medicine paste, food paste or industrial paste, and other semi-solid substances between solid and liquid, but the present application is not limited to the type, function and efficacy of the paste medium.

[0055] Further, referring to FIG. 2, the container body 1 can be provided with an outlet tube 6 at the outlet 12, which extends away from the container body 1. When the container body 1 is squeezed, the paste-like medium flows out of the outlet tube 6 to the outside for use. The outlet tube 6 forms a drainage effect on the paste-like medium, so that the paste-like medium is squeezed out in strips, making it easier to use. In addition, due to the viscosity of the paste-like medium, the paste-like medium in the outlet tube 6 can form a certain degree of sealing to the outlet tube 6, preventing air or the squeezed-out paste-like medium from flowing back into the medium cavity 111, thereby optimizing the use experience.

[0056] It should be noted that for paste-like medium with high viscosity, a larger diameter outlet tube 6 can be provided to ensure that the paste-like medium can be smoothly squeezed out; while for paste-like medium with relatively low viscosity, a smaller diameter outlet tube 6 can be provided, or the tube body of the outlet tube 6 can be lengthened, to ensure that the paste-like medium forms an effective seal in the outlet tube 6, preventing backflow.

[0057] Referring to FIGS. 1 and 2, the accommodation cavity 11 in this embodiment can be cylindrical, and the cross-section can be circular or approximately circular oval. The cylindrical structure is more conducive to the piston 2 continuously adhering to the inner wall of the accommodation cavity 11 when sliding axially along the accommodation cavity 11, ensuring the sealing effect, and the circular or approximately circular cross-section is also conducive to maintaining the seal between the piston 2 and the inner wall of the accommodation cavity 11. In this embodiment, the accommodation cavity 11 is only a preferred arrangement, and in other embodiments, referring to FIG. 3, the cross-section can also be configured as other smooth shapes with an arc shape, and the piston 2 is configured in a corresponding shape, but the present application is not limited by the shape, size, etc. of the accommodation cavity 11.

[0058] Referring to FIG. 1, the container body in this embodiment can have a flat bottom for easy upright placement, so that the medium container can be placed upright when not in use, making it easy to use. In addition, the main shape of the container body 1 can be, but is not limited to, cylindrical, oval, square, rectangular, gourd-shaped, etc., but the present application is not limited by the shape, size, or thickness of the container body 1.

[0059] Further, referring to FIGS. 4 and 5, the piston 2 includes a plug body 21 and a sealing sleeve 22, the sealing sleeve 22 is in a cylindrical shape and is sleeved on the side of the plug body 21, one end of the cylindrical structure of the sealing sleeve 22 is attached to the side of the plug body 21 to form a dense connection, and the other end extends towards the outlet 12. The entire outer side wall of the sealing sleeve 22 continuously adheres to the inner wall of the accommodation cavity 11 to form a seal, preventing the paste-like medium from entering the gas cavity 112.

[0060] In specific implementation, the sealing sleeve 22 can be configured with different extension lengths according to the characteristics of the paste-like medium. For paste-like medium that is more likely to flow, a longer sealing sleeve 22 can be configured to form a larger sealing surface 43, ensuring the sealing effect, but the present application is not limited by the size or thickness of the sealing sleeve 22.

[0061] Further, referring to FIG. 4 and FIG. 5, the plug body 21 can gradually contract towards the direction of the paste outlet 12, so as to form a gap between the plug body 21 and the sealing sleeve 22. Meanwhile, the sealing sleeve 22 can have the elastic deformation characteristic (the meaning of the elastic deformation has been explained above, and will not be repeated here, and the elastic deformation mentioned below also has the same meaning). When the container body 1 is deformed under the action of external force, the sealing sleeve 22 correspondingly deforms under the compression of the container body 1, so as to keep in close contact with the inner wall of the medium cavity 111 during the deformation and recovery of the container body 1, avoid the formation of a gap, and improve the sealing effect.

[0062] Further, referring to FIG. 5, the sealing sleeve 22 can gradually expand towards the direction of the paste outlet 12. Since the sealing sleeve 22 has elasticity, when the sealing sleeve 22 is placed in the accommodation cavity 11, the inner wall of the accommodation cavity 11 compresses the sealing sleeve 22, at which time the sealing sleeve 22 has a tendency to expand outward, so that the sealing sleeve 22 can more stably fit the inner wall of the accommodation cavity 11, further improving the sealing effect.

[0063] Referring to FIG. 4 and FIG. 5, the plug body 21 can have the elastic deformation characteristic, and the plug body 21 is provided with a gas collecting groove 211 on the side facing the gas cavity 112. The groove opening of the gas collecting groove 211 faces the gas cavity 112, and the groove bottom is located at the part of the plug body 21 close to the medium cavity 111, so that the plug body 21 presents an approximately bowl-shaped structure.

[0064] When a pressure difference is generated between the gas cavity 112 and the medium cavity 111, the piston 2 slides in the accommodation cavity 11, and the container body 1 is deforming or recovering at this time. At this time, the paste-like medium has the greatest possibility of penetrating into the gas cavity 112. At this time, due to the existence of the pressure difference, the gas exerts pressure on the inner wall of the gas collecting groove 211, which on the one hand pushes the piston 2 to move as a whole, and on the other hand expands the plug body 21 outward, so as to improve the close degree of the sealing sleeve 22 to the inner wall of the accommodation cavity 11, further improve the sealing effect, and reduce the possibility of leakage of the paste-like medium.

[0065] Further, referring to FIG. 4 and FIG. 5, the piston 2 can also include a connecting ring 23 which also has the elastic deformation characteristic. The connecting ring 23 has a ring-shaped structure as a whole, and the cross section is U-shaped, that is, one side of the connecting ring 23 is arc-shaped, and the other side has a groove opening. The U-shaped groove opening of the connecting ring 23 forms two annular connecting ends inside and outside, the annular connecting end located at the inner ring is attached to the plug body 21, and the annular connecting end located at the outer ring is attached to the sealing sleeve 22. The connecting ring 23, the plug body 21 and the sealing sleeve 22 form a dense and seamless structure.

[0066] When the container body 1 is deformed or restored, the connecting ring 23 is located between the two annular connecting ends of the inner ring and the outer ring, and the distance between the two annular connecting ends is reduced, and at the same time, the connecting ring 23 provides a certain support for the sealing sleeve 22 by its own elastic force, thereby further improving the deformation ability of the piston 2 as a whole and improving the sealing effect of the sealing sleeve 22.

[0067] At this time, the piston 2 as a whole has the characteristic of elastic deformation, and during the deformation of the container body 1, the piston 2 deforms correspondingly to ensure the sealing between the piston 2 and the container body 1. When the medium container of the present application is used, any position of the container body 1 can be squeezed, including the position where the piston 2 is located, and it is not necessary to adjust the squeezing method due to the change of the content of the paste-like medium, thereby greatly improving the convenience of use.

[0068] Further, referring to FIGS. 2 and 4, the outer wall of the plug body 21 close to the paste outlet 12 is shaped to fit the inner wall of the accommodating cavity 11 located at the paste outlet 12. When the paste-like medium in the medium cavity 111 is almost exhausted, the part of the container body 1 located in the gas cavity 112 is squeezed at this time, so that the piston 2 continues to slide to the paste outlet 12 and gradually fits the inner wall of the accommodating cavity 11, so as to more completely squeeze out the paste-like medium in the medium cavity 111 and reduce the residue.

[0069] Referring to FIGS. 2 and 6, the container body 1 can be provided with a one-way medium valve 4 at the paste outlet 12, the one-way medium valve 4 is in communication with the medium cavity 111 and is used to control the paste-like medium to be discharged from the medium cavity 111, and to prevent the paste-like medium and air from flowing back to the medium cavity 111. For the paste-like medium with a viscosity close to that of liquid, it is difficult to form an effective seal in the paste outlet tube 6, and therefore backflow may occur, which affects the use experience. By using the non-return function of the one-way medium valve 4, even if the viscosity of the paste-like medium is low, backflow can be effectively prevented.

[0070] It should be further pointed out that the aforementioned one-way air inlet valve 3 and one-way medium valve 4 can adopt but are not limited to spring-type one-way valves or diaphragm-type one-way valves, and other one-way valves or check valves in which fluid medium can only flow in one direction and cannot flow back, but the present application is not limited to the type, size and material of the one-way valve. In addition, the one-way air inlet valve 3 and the one-way medium valve 4 can be arranged on the side or end surface of the container body 1, as long as they can communicate with the corresponding cavity.

[0071] In this or other embodiments, referring to FIGS. 6 and 7, the one-way medium valve 4 can include a valve body 41, one end of which is in communication with the medium cavity 111, and the other end of which is formed with an opening 42, so that the paste-like medium can enter the valve body 41 from the medium cavity 111 and finally flow out through the opening 42. The valve body 41 has elastic deformation characteristics, and the valve body 41 has two sealing surfaces 43 at the opening 42, which abut against each other to close the opening 42 when the valve body 41 maintains its original shape. The valve body 41 is formed with a tapered surface in the direction of the opening 42, that is, the valve body 41 gradually shrinks inward in the direction of the opening 42, and forms a structure similar to a fishtail.

[0072] When the container body 1 is squeezed, the pressure in the medium cavity 111 increases, and the paste-like medium pushes the two sealing surfaces 43 apart from the inside to the outside, and the opening 42 of the valve body 41 is opened, and the paste-like medium flows out from the paste outlet 12. After the container body 1 is released, the paste-like medium no longer squeezes the sealing surfaces 43, and the valve body 41 is reset under the action of its own elastic force, and the two sealing surfaces 43 abut against each other again to close the opening 42, preventing the paste-like medium or air from flowing back, and at the same time, the flowed-out paste-like medium is cut off.

[0073] It is further explained that when the pressure in the medium cavity 111 is lower than the external environment, the paste-like medium or air will have a tendency to flow back into the medium cavity 111, but under the action of the pressure difference, the gas in the environment will press from the side of the valve body 41, further improving the abutment between the sealing surfaces 43, completely closing the opening 42, and achieving the effect of preventing backflow.

[0074] The sealing surfaces 43 can be provided in multiple groups, and the multiple groups of sealing surfaces 43 are radially distributed and connected to each other, and are opened at the same time to open the opening 42, and are abutted at the same time to close the opening 42. In order to optimize the cooperation between the groups of sealing surfaces 43, the included angles of the two adjacent groups of sealing surfaces 43 are the same.

[0075] As an example, referring to FIG. 8, the sealing surfaces 43 can be provided in four groups, and when the opening 42 is closed, the included angles between the two adjacent groups of sealing surfaces 43 are 90 degrees, and the four groups of sealing surfaces 43 as a whole form a cross-shaped structure. In other embodiments, other numbers of groups of sealing surfaces can also be provided, and the size of the included angle can be adjusted accordingly, but the present application is not limited to the number and arrangement of the sealing surfaces 43.

[0076] Referring to FIGS. 1 and 2, in order to prevent accidental squeezing of the paste-like medium, an end cover 5 can be provided at the paste outlet 12 of the container body 1, and the end cover 5 is detachably connected with the container body 1. The end cover 5 is connected with the container body 1 and seals the paste outlet 12. In this embodiment, the end cover 5 and the container body 1 can be connected by, but not limited to, screwing, buckling and clamping, and the best is screwing, which is convenient to disassemble and can withstand a large pressure, but the present application is not limited to the connection method of the end cover 5 and the container body 1.

[0077] The implementation principle of the hand squeeze pump disclosed by the embodiments of the present application is as follows:

[0078] Before use, the end cover 5 is removed;

[0079] When the container body 1 is pressed to the position of the medium cavity 111, the medium cavity 111 is contracted, and the paste-like medium is squeezed out from the paste outlet 12 through the one-way medium valve 4 under the external force. When the container body 1 is released, the container body 1 begins to restore the shape, the medium cavity 111 is expanded and forms a negative pressure, and under the action of the pressure difference, the air enters the gas cavity 112 from the one-way air inlet valve 3 and pushes the piston 2 to slide towards the paste outlet 12 until the container body 1 is completely restored.

[0080] When the container body 1 is pressed to the position of the gas cavity 112, the gas cavity 112 is contracted, the pressure is increased, a pressure difference is formed with the medium cavity 111, and then the piston 2 is pushed to slide towards the paste outlet 12. The piston 2 squeezes the paste-like medium out of the paste outlet 12. When the container body 1 is released, the container body 1 begins to restore the shape, the gas cavity 112 is expanded, the air enters the gas cavity 112 from the one-way air inlet valve 3, and the container body 1 is completely restored.

[0081] Meanwhile, the piston 2 has the elastic deformation characteristic, so that no matter how much paste-like medium is left in the medium cavity 111, the container body 1 can be pressed at any position including the position of the piston 2 to squeeze out the paste-like medium, greatly improving the convenience of use.

[0082] Embodiment 2:

[0083] The difference between the present embodiment and embodiment 1 is that:

[0084] Referring to FIGS. 9 and 10, the sealing surface 43 can be provided in six groups, and the included angle between the adjacent two groups of sealing surfaces 43 is 60 degrees when the opening 42 is closed, so as to further facilitate the expansion of the opening 42. In addition, the one-way medium valve 4 in the present embodiment is inserted into the paste outlet pipe 6 at the end away from the opening 42, and the other end is located outside the paste outlet pipe 6, that is, the part of the valve body 41 located at the opening 42 is outside the paste outlet pipe 6. When the container body 1 is pressed, the paste outlet pipe 6 will not limit the deformation of the valve body 41, and the paste is more convenient to squeeze out.

[0085] It is additionally explained that the one-way medium valve 4 and the paste outlet pipe 6 can be connected by, but are not limited to, screwing, buckling and clamping, but the present application is not limited to the connection mode of the two.

[0086] The above are the preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, any equivalent changes made on the basis of the structure, shape and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A hand pump characterized in that, The utility model relates to a container, which comprises: a container body (1) having elastic deformation characteristics and internally formed with a containing cavity (11); a piston (2) slidingly arranged in the containing cavity (11) and sealingly matched with the container body (1), the piston (2) separating the containing cavity (11) into a medium cavity (111) and a gas cavity (112) that are not in communication with each other, the medium cavity (111) being used for containing paste-like medium, and the medium cavity (111) being in communication with an outlet (12); a one-way air inlet valve (3) in communication with the gas cavity (112), the one-way air inlet valve being used for controlling the one-way entry of air into the gas cavity (112) and blocking the escape of air from the gas cavity (112).

2. The hand pump of claim 1, wherein: The piston (2) as a whole has elastic deformation characteristics.

3. The hand pump of claim 1, wherein: The piston (2) comprises a plug body (21) and a sealing sleeve (22), the sealing sleeve (22) being sleeved on the circumferential side of the plug body (21) and sealingly matched with the inner wall of the containing cavity (11), one end of the sealing sleeve (22) being connected to the plug body (21), and the other end extending towards the outlet (12).

4. The hand pump of claim 3, wherein: A gap is formed between the sealing sleeve (22) and the plug body (21), and the sealing sleeve (22) has elastic deformation characteristics.

5. The hand pump of claim 4, wherein: The sealing sleeve (22) gradually expands towards the outlet (12).

6. The hand pump of claim 4, wherein: The plug body (21) has elastic deformation characteristics, and a gas collecting groove (211) is formed on the side of the plug body (21) facing the gas cavity (112), the groove opening of the gas collecting groove (211) facing the gas cavity (112), and the groove bottom being located at the part of the plug body (21) close to the medium cavity (111).

7. The hand pump according to any one of claims 4-6, characterized in that: The piston (2) further comprises a connecting ring (23) having elastic deformation characteristics, the connecting ring (23) being annular in structure, the connecting ring (23) forming an annular connecting end at the inner ring and an annular connecting end at the outer ring, the annular connecting end at the inner ring being attached to the plug body (21), and the annular connecting end at the outer ring being attached to the sealing sleeve (22).

8. The hand pump of claim 1, wherein: A one-way medium valve (4) is further included, the one-way medium valve (4) being arranged at the outlet (12) and in communication with the medium cavity (111), the one-way medium valve (4) being used for controlling the discharge of paste-like medium from the medium cavity (111) and blocking the backflow of paste-like medium and air into the medium cavity (111).

9. The hand pump of claim 8, wherein: The one-way medium valve (4) comprises a valve body (41) having elastic deformation characteristics, one end of the valve body (41) being in communication with the medium cavity (111), the other end of the valve body (41) being formed with an opening (42), the valve body (41) having two sealing surfaces (43) at the opening (42), the two sealing surfaces (43) being in abutment with each other to close the opening (42) when the valve body (41) maintains its original shape, and the valve body (41) gradually shrinking inwardly towards the opening (42).

10. The hand pump of claim 9, wherein: Two mutually abutting sealing surfaces (43) form a group, the sealing surfaces (43) being arranged in multiple groups, the multiple groups of sealing surfaces (43) being radially distributed and connected with each other, and the included angle between adjacent two groups of sealing surfaces (43) being the same.

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