CN111232419A - Foam pump and packaging container - Google Patents

Abstract

The invention relates to the technical field of pump heads, and discloses a foam pump which discharges foam according to pressing operation. The packaging container comprises a container capable of containing fluid and the foam pump, wherein the pump body is mounted on the container, and the lower end of the pump body is communicated with the container. The packaging container uses the foam pump, and the pump main body, the pressing head and the elastic body are made of plastics, so that the foam pump becomes a full-plastic pump, and can be recycled without disassembling the foam pump or distinguishing parts made of different materials, thereby being convenient to process and more environment-friendly; and the elastic body made of plastics replaces the metal spring, so that the metal spring is prevented from generating chemical reaction with fluid, the pollution can be reduced, and the safety and the sanitation are better.

Description

Foam pump and packaging container

Technical Field

The invention relates to the technical field of pump heads, in particular to a foam pump and a packaging container provided with the foam pump.

Background

With the improvement of living standard, people always need to use various beauty and skin care products and washing and caring products, and particularly, foam skin care products and foam washing and caring products are gradually and widely applied to life. The fluid is contained in a container bottle, and foam is formed and sprayed by pressing a pump head, and is used for moisturizing, beautifying, bathing or washing hair, such as bubble moisturizing water, bubble bath lotion, bubble shampoo and the like.

However, the metal spring is adopted in the foam pump in the prior art, so that the metal spring is easy to generate chemical reaction after long-term use, the spring is easy to age, toxic substances can permeate into fluid to cause pollution, the foam pump is not safe enough to use, and the service life of the foam pump can not be guaranteed. In addition, the waste foam pump is not easy to recycle due to the fact that metal and plastic exist in the waste foam pump.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides a foam pump which is safe to use and easy to recycle.

The technical scheme adopted by the invention for solving the technical problems is as follows:

a foam pump for discharging foam according to a pressing operation includes a pump body, a pressing head provided at an upper end of the pump body, and an elastic body provided between the pump body and the pressing head, wherein the pump body, the pressing head, and the elastic body are made of plastic.

As an improvement of the technical scheme, the elastic body is sleeved outside the joint of the pump main body and the pressing head, one end of the elastic body is abutted to the pressing head, and the other end of the elastic body is abutted to the pump main body.

As an improvement of the above technical solution, the pump body includes a housing mountable on the container, the press head is disposed at an upper end of the housing, the elastic body is disposed between the housing and the press head, a foam passage is disposed in the press head, a gas-liquid mixing chamber is disposed inside an upper end of the housing, a liquid pump chamber and a gas pump chamber are disposed at a lower end of the housing, the gas-liquid mixing chamber is communicated with the foam passage, the gas-liquid mixing chamber is respectively communicated with the liquid pump chamber and the gas pump chamber, a liquid pump piston and a gas pump piston are respectively disposed in the liquid pump chamber and the gas pump chamber, and when the press head moves downward, the lower end of the press head can push the liquid pump piston.

As an improvement of the above technical solution, the pump main body further includes a piston body, the piston body includes the air pump piston and locates the air pump piston at the center of the air pump piston, the air pump piston is provided with an air hole, the air hole is communicated with the air pump chamber, the air hole can be communicated with the air-liquid mixing chamber, the liquid pump piston is provided with a liquid passage at the center, the liquid passage is communicated with the liquid pump chamber, and the liquid passage can be communicated with the air-liquid mixing chamber.

As an improvement of the above technical solution, a gas control element is arranged between the pressing head and the piston body, the upper end of the gas control element is fixedly connected with the pressing head, the gas control element comprises a first sealing tube arranged at the lower end and a second sealing tube sleeved outside the first sealing tube, the first sealing tube is communicated with the foam channel, the first sealing tube is hermetically connected with the upper end of the second sealing tube, the piston body further comprises a pipe column arranged at the upper end of the liquid pump piston, the pipe column is arranged between the first sealing tube and the second sealing tube, the inner wall and the outer wall of the pipe column are both provided with a plurality of vent grooves, gas in the gas pump chamber can enter the pipe column through the gas hole, the vent groove on the outer wall of the pipe column and the vent groove on the inner wall of the pipe column, and the pipe column is communicated with the foam; the liquid pump is characterized in that an inverted funnel ring is arranged inside the upper end of the liquid pump piston, a valve core is arranged in the pipe column, the upper end of the valve core is fixedly connected with the pressing head, and a circular table is arranged at the lower end of the valve core and can be used for plugging or separating from the funnel ring.

As the improvement of the technical scheme, the upper end face of the air pump piston is provided with the raised annular sealing strip along the circumferential direction, the annular sealing strip is arranged on one side of the air hole, away from the center of the air pump piston, the outer side of the second sealing tube is provided with the ring platform, the lower end of the ring platform is provided with the annular sealing groove, and the annular sealing groove can be clamped or separated from the annular sealing strip.

As the improvement of the technical scheme, a liquid passing pipe is arranged at the lower end of the liquid pump chamber, a valve hole and a valve piece are arranged in the liquid passing pipe, the valve piece is arranged above the valve hole, and the valve piece can be blocked or separated from the valve hole.

As an improvement of the above technical solution, the pump body and the pressing head are respectively provided with a first self-locking structure and a second self-locking structure which can be matched with each other, and when the pressing head rotates in different directions relative to the pump body, the pressing head is self-locked or self-locked.

As an improvement of the above technical solution, the first self-locking structure includes a vertical guide groove or a guide strip provided on the pump body, the second self-locking structure includes a guide strip or a vertical guide groove provided on the pressing head, an arc-shaped limiting groove is provided along the circumferential direction on the sidewall of the vertical guide groove, the vertical guide groove is communicated with the limiting groove, and the limiting groove is located at one end close to the guide strip.

A packaging container comprises a container capable of containing fluid and the foam pump, wherein the pump body is mounted on the container, and the lower end of the pump body is communicated with the container.

The invention has the following beneficial effects:

the packaging container uses the foam pump, and the pump main body, the pressing head and the elastic body are made of plastics, so that the foam pump becomes a full-plastic pump, and can be recycled without disassembling the foam pump or distinguishing parts made of different materials, thereby being convenient to process and more environment-friendly; and the elastic body made of plastics replaces the metal spring, so that the metal spring is prevented from generating chemical reaction with fluid, the pollution can be reduced, and the safety and the sanitation are better.

Drawings

The invention is further described with reference to the following detailed description of embodiments and drawings, in which:

FIG. 1 is a schematic perspective view of an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of an embodiment of the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

FIG. 4 is a schematic structural view of a housing in an embodiment of the invention;

FIG. 5 is a partial enlarged view at B in FIG. 4;

FIG. 6 is a schematic structural diagram of a pressing head according to an embodiment of the present invention.

Detailed Description

Referring to fig. 1, the present invention discloses a packing container including a container capable of containing a fluid and a foam pump, wherein a pump body 10 is mounted on the container, a lower end of the pump body 10 is communicated with the container, and the foam pump discharges foam by pressing a pressing head 2 of the foam pump.

The invention also discloses a foam pump, which comprises a pump main body 10, a pressing head 2 arranged at the upper end of the pump main body 10 and an elastic body 3 arranged between the pump main body 10 and the pressing head 2, wherein the pump main body 10, the pressing head 2 and the elastic body 3 are all made of plastics.

Specifically, the pump main body 10, the pressing head 2 and the elastic body 3 are made of plastics, so that the foam pump becomes a full-plastic pump, and the foam pump can be recycled without disassembling the foam pump or distinguishing parts made of different materials, is convenient to treat and is more environment-friendly; and the elastomer 3 made of plastics replaces the metal spring, so that the metal spring is prevented from generating chemical reaction with fluid, the pollution can be reduced, and the safety and the sanitation are better.

Referring to fig. 2, the elastic body 3 is sleeved outside a connection portion between the pump main body 10 and the pressing head 2, and one end of the elastic body 3 abuts against the pressing head 2 and the other end abuts against the pump main body 10. Specifically, the pump body 10 includes a housing 1 that can be mounted on a container, the pressing head 2 is provided at an upper end of the housing 1, and the elastic body 3 is provided between the housing 1 and the pressing head 2. All be equipped with the mounting groove on shell 1 and the press head 2, the both ends joint respectively of elastomer 3 is in two mounting grooves.

The pump body 10 and the pressing head 2 are respectively provided with a first self-locking structure and a second self-locking structure which can be matched with each other, and when the pressing head 2 rotates towards different directions relative to the pump body 10, the pressing head 2 is self-locked or self-locked.

Referring to fig. 4-6, the first self-locking structure includes a vertical guide groove 11 or a guide bar provided on the pump body 10, the second self-locking structure includes a guide bar 22 or a vertical guide groove provided on the pressing head 2, an arc-shaped limiting groove 12 is provided along the circumferential direction on the sidewall of the vertical guide groove, the vertical guide groove 11 is communicated with the limiting groove 12, and the limiting groove 12 is located at one end close to the guide bar 22. In order to prevent the pressing head 2 from rotating and losing the self-locking function in the moving process, a limiting protrusion 13 is arranged on the arc surface of the limiting groove 12.

Thus, when the pressing head 2 is in a non-self-locking state, the pressing head 2 is pressed or loosened, the guide strip 22 can only slide up and down in the vertical guide groove 11, and the rotation of the pressing head 2 is limited by the arrangement of the guide strip 22 and the vertical guide groove 11; when the pressing head 2 is rotated to be in a self-locking state, one end of the guide strip 22 is abutted to the bottom of the limiting groove 12, the limiting groove 12 limits the up-down movement of the pressing head 2, and the limiting protrusion 13 limits the rotation of the pressing head 2.

In this embodiment, the vertical guide groove 11 is provided in the housing 1, the guide strip 22 is provided on the pressing head 2, and the stopper groove 12 is located at the upper end of the housing 1. Thus, when the elastic body 3 is in a natural state, that is, in a state where the pressing head 2 is not pressed down, the pressing head 2 is rotated, so that the lower end of the guide strip 22 is rotated into the limiting groove 12 and is rotated to the other side of the limiting protrusion 13 through the limiting protrusion 13, and at this time, the pressing head 2 cannot move up or press down, and cannot rotate by itself, thereby realizing the self-locking function of the pressing head 2. The use of traditional foam pump is prevented pressing and is pressed the clamp and reach the purpose of pinning the press head 2, and the auto-lock structure has replaced preventing pressing and has pressed the clamp for the product part reduces, and the structure is simpler, is convenient for produce, moulds plastics, equipment, with this reduction manufacturing cost. The pressing head 2 is locked when not in use and opened when in use, so that the problems of liquid leakage, fluid oxidation and the like caused by extrusion when the pressing head 2 is transported, carried and stored can be effectively avoided, and inconvenience caused by loss of the pressure clamp is avoided.

Specifically, in the present embodiment, the housing 1 includes a threaded portion 14 capable of being fitted to the container, and an annular portion 15 provided at an upper end of the threaded portion 14, an upper end of the threaded portion 14 communicates with an inside of the annular portion 15, and the annular portion 15 communicates with outside air. The pressing head 2 includes the foam passage 21 at a lower portion and a foam outlet 24 at an upper portion communicating with the foam passage 21, and the annular portion 15 is slidable up and down outside the foam passage 21. The inner wall of ring portion 15 is equipped with two vertical guide way 11, and vertical guide way 11 runs through ring portion 15 from top to bottom, communicates the inside and the outside of screw thread portion 14, the outer wall correspondence of foam passageway 21 is equipped with two gibs 22. The inside of the screw part 14 passes through the vertical guide groove 11, and outside air can enter the air pump chamber 6 through the vertical guide groove 11 and the air hole 73.

Referring to fig. 2 and 3 again, a foam passage 21 is arranged in the pressing head, a gas-liquid mixing chamber 4 is arranged in the upper end of the housing, a liquid pump chamber 5 and a gas pump chamber 6 are arranged at the lower end of the housing, the gas-liquid mixing chamber 4 is communicated with the foam passage 21, the gas-liquid mixing chamber 4 can be respectively communicated with the liquid pump chamber 5 and the gas pump chamber 6, a liquid pump piston 71 and a gas pump piston 72 are respectively arranged in the liquid pump chamber 5 and the gas pump chamber 6, and when the pressing head 2 moves downwards, the lower end of the pressing head 2 can push the liquid pump piston 71 and the gas pump piston 72.

Specifically, the pump main body 10 further includes a piston body 7 disposed inside the threaded portion 14, the piston body 7 includes the air pump piston 72 and the liquid pump piston 71 disposed at the center of the air pump piston 72, that is, the air pump piston 72 and the liquid pump piston 71 are integrally disposed, so that a complex linkage structure in the middle is omitted, product parts are reduced, the structure is simpler, the assembly is convenient, and the cost is reduced.

Specifically, the piston body 7 further includes a column 75 disposed at the upper end of the liquid pump piston 71, the inner wall and the outer wall of the column are both provided with a plurality of vent grooves 76, the gas in the gas pump chamber 6 can enter the column 75 through the gas hole 73, the vent grooves 76 of the outer wall of the column and the vent grooves 76 of the inner wall of the column, and the column 75 is communicated with the foam passage 21. The lower end of the space enclosed by the pipe column 75 is a gas-liquid mixing chamber 4.

The air pump piston is provided with an air hole 73, the air hole 73 is communicated with the air pump chamber 6, the air hole 73 can be communicated with the gas-liquid mixing chamber 4, the liquid pump piston 71 is provided with a liquid passage 74 at the center, the liquid passage 74 is communicated with the liquid pump chamber 5, and the liquid passage 74 can be communicated with the gas-liquid mixing chamber 4. Thus, the gas in the gas pump chamber 6 can enter the gas-liquid mixing chamber 4 through the gas hole 73, the fluid in the liquid pump chamber 5 can enter the gas-liquid mixing chamber 4 through the liquid passage 74, the gas and the fluid are mixed to form foam, and the foam passes through the foam passage 21 and flows out from the foam outlet 24.

Moreover, be equipped with gas control 8 between press head 2 and the piston body 7, the upper end and the press head 2 fixed connection of gas control 8, the upper end joint of gas control 8 is in foam passageway 21, gas control 8 is including locating the first sealed tube 81 of lower extreme and the second sealed tube 82 of cover locating outside the first sealed tube, the upper end sealing connection of first sealed tube 81 and second sealed tube 82, tubular column 75 is located between first sealed tube 81 and the second sealed tube 82, and the inner wall and the outer wall of tubular column 75 contact with the outer wall of first sealed tube 81 and the inner wall of second sealed tube 82 respectively, first sealed tube 81 and foam passageway 21 intercommunication.

Thus, the piston body 7 moves downward, and the gas in the gas pump chamber 6 can enter the gap between the inner wall of the second seal pipe 82 and the outer wall of the stem 75, i.e., the vent groove 76 of the outer wall of the stem, from the lower end of the second seal pipe 82 through the gas hole 73, reach the inside of the upper ends of the first seal pipe 81 and the second seal pipe 82, and then enter the gas-liquid mixing chamber 4 inside the stem 75 from the upper end of the first seal pipe 81 along the gap between the outer wall of the first seal pipe 81 and the inner wall of the stem 75, i.e., the vent groove 76 of the inner wall of the stem.

Referring to fig. 3, in order to block the communication between the air hole 73 and the outside air when the pressing head 2 is pressed down, a raised annular sealing strip 77 is circumferentially arranged on the upper end surface of the air pump piston 72, the annular sealing strip 77 is arranged on one side of the air hole 73, which is far away from the center of the air pump piston 72, an annular platform 83 is arranged on the outer side of the second sealing tube 82, an annular sealing groove 84 is arranged at the lower end of the annular platform 83, and the annular sealing groove 84 can be clamped or separated from the annular sealing strip 77. The side wall of the upper end of the air pump chamber 6 is provided with a small hole 61, the air pump piston 72 can seal or avoid the small hole 61, and the container can be communicated with the inside of the upper end of the thread part 14 through the small hole 61.

Moreover, the upper end face of air pump piston 72 is equipped with first vertical ring 79, tubular column 75 is located first vertical ring 79 inboardly, first vertical ring 79 is located annular sealing strip 77 inboardly, the lower extreme of gas control 8 is equipped with second vertical ring 87, and the lower terminal surface of ring platform 83 is located to second vertical ring 87, the side of first vertical ring 79 is equipped with annular recess 791 or arch, the side correspondence of second vertical ring 87 is equipped with annular arch 871 or recess, arch 871 is located recess 791.

Concretely, protruding 871 and recess 791 interference fit, protruding 871 and recess 791 form seal structure, the fluid in gas-liquid mixing chamber 4 can not flow back to the outer fringe of air pump piston 72 up end from tubular column 75 and gas control 8's clearance like this, also be the position outside first vertical ring 79, just also avoided the fluid to permeate into air pump chamber 6 from the edge of air pump piston 72 in, the use of this foam pump is felt has been strengthened, it is smooth and easy to guarantee that air pump piston 72 kick-backs, increase the bubble volume of spouting of using at every turn, and strengthen the sealed effect of air pump piston 72, avoid hydrops in the air pump chamber 6, the rotten problem of hydrops has been solved.

Further, the upper end surface of the air pump piston 72 is provided with a third vertical ring 710, the air hole 73 is located between the annular sealing strip 77 and the third vertical ring 710, the lower end of the air control member 8 is correspondingly provided with a fourth vertical ring 86, the fourth vertical ring 86 is arranged on the lower end surface of the ring platform 83, the third vertical ring 710 and the fourth vertical ring 86 are in clearance fit, the first vertical ring 79 is located on the inner side of the third vertical ring 710, and the second vertical ring 87 is located on the inner side of the fourth vertical ring 86. The third vertical ring 710 is used to store fluid, and if a small amount of fluid flows out of the first vertical ring 79 on the upper end surface of the air pump piston 72, the third vertical ring 710 will block the fluid from continuing to flow toward the edge of the air pump piston 72, so as to further ensure that no liquid is accumulated in the air pump chamber 6.

Thus, when the pressing head 2 is pressed down, the pressing head 2 pushes the gas control member 8 to move downwards, the ring platform 83 moves downwards, the protrusion 871 is positioned at the lower part of the groove 791, the protrusion 871 is in clearance fit with the lower part of the groove 791, the annular sealing groove 84 is clamped with the annular sealing strip 77 to block the communication between the gas hole 73 and the inside of the upper end of the threaded part 14, then, the gas control member 8 pushes the gas pump piston 72 to move downwards, the gas in the gas pump chamber 6 is extruded, the gas does not overflow to the outside air through the gas hole 73 and the vertical guide groove 11, and can pass through the gas hole 73, the third vertical ring 710 and the first vertical ring 79 from the lower end of the second sealing pipe 82, enter the gap between the inner wall of the second sealing pipe 82 and the outer wall of the column 75, namely, enter the vent groove 76 of the outer wall of the column, reach the inside of the upper ends of the first sealing pipe 81 and the second sealing pipe 82, and then from the, the gas-liquid mixing chamber 4 is then entered along the clearance between the outer wall of the first seal pipe 81 and the inner wall of the column 75, i.e., the vent groove 76 of the inner wall of the column; meanwhile, when the air pump piston 72 moves downward, the position of the small hole 61 is avoided, and external air enters the inside of the upper end of the threaded part 14 through the vertical guide groove 11 and is replenished into the container through the small hole 61.

When the pressing head 2 is released, the pressing head 2 rebounds and resets to the original state before pressing under the action of the elastic body 3, the pressing head 2 drives the gas control part 8 to move upwards, the annular sealing groove 84 also moves upwards above the annular sealing strip 77 to separate from the annular sealing strip 77, negative pressure is formed in the air pump chamber 6, a certain suction force is formed at the air hole 73, and external air is supplemented to the air pump chamber 6 through the through hole 13 and the air hole 73; meanwhile, the protrusion 871 is clamped at the upper end of the groove 791, the protrusion 871 is in interference fit with the upper end of the groove 791, and the protrusion 871 and the groove 791 form a sealing structure, so that fluid in the gas-liquid mixing chamber 4 cannot flow back to the outer edge of the upper end surface of the air pump piston 72, namely the position outside the first vertical ring 79, from the gap between the pipe column 75 and the gas control member 8 due to the negative pressure of the air pump chamber 6, and liquid accumulation in the air pump chamber 6 is avoided; after the pressing head 2 is returned, the air pump piston 72 seals the small hole 61, so that the container forms a sealed environment.

Correspondingly, an inverted funnel ring 78 is arranged inside the upper end of the liquid pump piston 71, a valve core 9 is arranged in the pipe column 75, the upper end of the valve core 9 is fixedly connected with the gas control member 8, namely indirectly fixedly connected with the pressing head 2, a circular truncated cone 91 is arranged at the lower end of the valve core 9, and the circular truncated cone 91 can block or separate from the funnel ring 78, namely the outer inclined surface of the circular truncated cone 91 can block the inner inclined surface of the funnel ring 78. When the pressing head 2 is pressed down, the valve core 9 moves downwards, the circular truncated cone 91 is separated from the funnel ring 78 downwards, and liquid can enter the gas-liquid mixing cavity 4 in the pipe column 75 through the gap between the circular truncated cone 91 and the funnel ring 78; when the pressing head 2 is released, the pressing head 2 drives the valve core 9 to move upwards, the outer inclined surface of the circular truncated cone 91 can block the inner inclined surface of the funnel ring 78, and fluid in the gas-liquid mixing cavity 4 is prevented from flowing back to the liquid pump cavity 5.

Specifically, the inner wall of the upper end of the gas control member 8 is provided with an annular bone position 85, the upper end of the valve core 9 is clamped in a central hole of the bone position 85, the bone position 85 is provided with a plurality of bubble outlet holes which are communicated up and down, and the inner wall of the upper end of the gas control member 8 is provided with a plurality of guide ribs 88 at the lower side of the bone position 85, so that the valve core 9 is convenient to install. The foam passage 21 has a mesh post 18 mounted therein.

In addition, a liquid pipe 53 is provided at the lower end of the liquid pump chamber 5, a valve hole 51 and a valve member 52 are provided in the liquid pipe 53, the valve member 52 is provided above the valve hole 51, and the valve member 52 can block or separate from the valve hole 51. The upper end of the liquid flowing pipe 53 is connected to the liquid pump chamber 5, and a suction pipe can be attached to the lower end of the liquid flowing pipe 53. When the liquid pump piston 71 moves downwards, the valve member 52 blocks the valve hole 51 under the pressure of the fluid in the liquid pump chamber 5, and the fluid in the liquid pump chamber 5 can only flow upwards into the gas-liquid mixing chamber 4 inside the pipe column 75 through the liquid passage 74; when the liquid pump piston 71 moves upward, negative pressure is formed in the liquid pump chamber 5, the valve member 52 floats upward under the action of the negative pressure to separate from the valve hole 51, and the fluid in the container is sucked into the liquid pump chamber 5 through the suction pipe.

When the air pump is used, when the pressing head 2 is pressed down, the air control part 8 moves downwards along with the pressing head, the annular sealing groove 84 is downwards clamped with the annular sealing strip 77, so that the air hole 73 cannot be communicated with the inside of the upper end of the threaded part 14, and a channel for air overflowed from the air pump chamber 6 to the outside is cut off; meanwhile, the valve core 9 is driven by the gas control component 8 to move downwards, the circular truncated cone 91 is separated from the funnel ring 78, and the liquid channel 74 is communicated with the interior of the pipe column 75; the valve member 52 blocks the valve hole 51.

Then, the pressing head 2 moves downwards continuously, the column 75 is pushed downwards by the gas control member 8, the piston body 7 moves downwards, gas in the gas pump chamber 6 is extruded by the gas pump piston 72, enters between the annular table 83 and the gas pump piston 72 through the gas hole 73, and enters the inner lower end of the column 75 through the vent groove 76 on the outer wall of the column and the vent groove 76 on the inner wall of the column; meanwhile, the fluid in the liquid pump chamber 5 is squeezed by the liquid pump piston 71, and the fluid enters the inner lower end of the pipe column 75 through the gap between the circular truncated cone 91 and the funnel ring 78; the lower end of the interior of the pipe column 75 is the gas-liquid mixing chamber 4, and gas and fluid are primarily mixed at the lower end of the pipe column 75 to form bubbles; the bubbles pass through the gaps between the plurality of guide ribs 88 and then through the foam outlet holes in the bone 85 to form foam; then the foam is divided into dense foams through the net post 18; the foam flows out through the foam outlet 24.

Then, the pressing head 2 is released, the pressing head 2 rebounds and returns to the original state before pressing under the action of the elastic body 3, the air control part 8 moves upwards in the process, the annular sealing groove 84 is separated from the annular sealing strip 77, the protrusion 871 and the groove 791 form a sealing structure, liquid in the pipe column 75 is prevented from flowing back to the upper end face of the air pump piston 72, and external air is supplemented to the air pump chamber 6 through the vertical guide groove 11 and the air hole 73; meanwhile, the valve core 9 moves upwards, and the cone 91 blocks the funnel ring 78 to prevent foam from flowing back; then, the circular truncated cone 91 hooks the funnel ring 78 to move upwards, so that the piston body 7 is restored under the pulling force of the valve core 9; the valve member 52 floats up and is separated from the valve hole 51, and the fluid in the container is sucked into the liquid pump chamber 5 through the suction pipe.

The liquid pump chamber 5 and the gas pump chamber 6 are integrally formed, and the liquid pump chamber 5 is provided at a lower end of the center of the gas pump chamber 6.

The packaging container has low requirement on sealing performance, can be used in various environments, does not need to pressurize the container bottle, and is safe.

The above description is only a preferred embodiment of the present invention, but the present invention is not limited to the above embodiments, and the present invention shall fall within the protection scope of the present invention as long as the technical effects of the present invention are achieved by any similar or identical means.

Claims (10)

1. A foam pump for discharging foam in response to a pressing operation, characterized in that: the pump comprises a pump body (10), a pressing head (2) arranged at the upper end of the pump body (10) and an elastic body (3) arranged between the pump body (10) and the pressing head (2), wherein the pump body (10), the pressing head (2) and the elastic body (3) are all made of plastics.

2. A foam pump as defined in claim 1, wherein: the elastic body (3) is sleeved outside the joint of the pump main body (10) and the pressing head (2), one end of the elastic body (3) is abutted to the pressing head (2), and the other end of the elastic body is abutted to the pump main body (10).

3. A foam pump according to claim 1 or 2, wherein: the pump main body (10) comprises a shell (1) which can be arranged on the container, the pressing head (2) is arranged at the upper end of the shell (1), the elastic body (3) is arranged between the shell (1) and the pressing head (2), a foam channel (21) is arranged in the pressing head, a gas-liquid mixing cavity (4) is arranged in the upper end of the shell, a liquid pump chamber (5) and a gas pump chamber (6) are arranged at the lower end of the shell, the gas-liquid mixing cavity (4) is communicated with the foam channel (21), and the gas-liquid mixing cavity (4) can be respectively communicated with the liquid pump chamber (5) and the gas pump chamber (6), a liquid pump piston (71) and an air pump piston (72) are respectively arranged in the liquid pump chamber (5) and the air pump chamber (6), when the pressing head (2) moves downwards, the lower end of the pressing head (2) can push a liquid pump piston (71) and an air pump piston (72).

4. A foam pump as claimed in claim 3, wherein: the pump main part (10) still includes piston body (7), piston body (7) include air pump piston (72) and locate air pump piston (72) central authorities liquid pump piston (71), be equipped with gas pocket (73) on air pump piston (72), gas pocket and gas pump room (6) intercommunication, just the gas pocket can communicate with the gas-liquid mixing chamber, liquid pump piston (71) central authorities are equipped with liquid passage (74), liquid passage (74) and liquid pump room (5) intercommunication, just liquid passage (74) can communicate with the gas-liquid mixing chamber.

5. A foam pump according to claim 4, wherein: the gas pump is characterized in that a gas control element (8) is arranged between the pressing head (2) and the piston body (7), the upper end of the gas control element (8) is fixedly connected with the pressing head (2), the gas control element (8) comprises a first sealing pipe (81) arranged at the lower end and a second sealing pipe (82) sleeved outside the first sealing pipe, the first sealing pipe (81) is communicated with the foam channel (21), the first sealing pipe (81) is hermetically connected with the upper end of the second sealing pipe (82), the piston body (7) further comprises a pipe column (75) arranged at the upper end of the liquid pump piston (71), the pipe column (75) is arranged between the first sealing pipe (81) and the second sealing pipe (82), the inner wall and the outer wall of the pipe column are respectively provided with a plurality of vent grooves (76), and gas in the gas pump chamber (6) can enter the pipe column (75) through the gas hole (73), the vent groove (76) on the outer wall of the pipe column and the vent groove (76) on the inner wall of the pipe, the pipe column (75) is communicated with the foam channel (21); the liquid pump is characterized in that an inverted funnel ring (78) is arranged inside the upper end of the liquid pump piston (71), a valve core (9) is arranged in the pipe column (75), the upper end of the valve core (9) is fixedly connected with the pressing head (2), a round table (91) is arranged at the lower end of the valve core (9), and the round table (91) can be used for plugging or separating from the funnel ring (78).

6. A foam pump according to claim 5, wherein: the up end of air pump piston (72) is equipped with bellied annular sealing strip (77) along circumference, one side at air hole (73)'s the air pump piston (72) center of keeping away from is located in annular sealing strip (77), the outside of second sealed tube (82) is equipped with ring platform (83), the lower extreme of ring platform (83) is equipped with annular seal groove (84), annular seal groove (84) can joint or break away from annular sealing strip (77).

7. A foam pump as claimed in claim 3, wherein: the lower end of the liquid pump chamber (5) is provided with a liquid passing pipe (53), a valve hole (51) and a valve piece (52) are arranged in the liquid passing pipe (53), the valve piece (52) is arranged above the valve hole (51), and the valve piece (52) can block or be separated from the valve hole (51).

8. A foam pump as defined in claim 1, wherein: the pump main body (10) and the pressing head (2) are respectively provided with a first self-locking structure and a second self-locking structure which can be matched with each other, and when the pressing head (2) rotates towards different directions relative to the pump main body (10), the pressing head (2) is self-locked or self-locking is released.

9. A foam pump as defined in claim 8, wherein: first auto-lock structure is including vertical guide way (11) or the gib block of locating pump main part (10), second auto-lock structure is including corresponding gib block (22) or the vertical guide way of locating press head (2), the lateral wall of vertical guide way is equipped with curved spacing groove (12) along circumference, vertical guide way (11) and spacing groove (12) intercommunication, spacing groove (12) are located the one end that is close to gib block (22).

10. A packaging container characterized by: comprising a container capable of containing a fluid and a foam pump as claimed in any one of claims 1 to 9, said pump body (10) being mounted on the container, the lower end of said pump body (10) being in communication with the container.

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