WO2022041635A1

WO2022041635A1 - Foam pump

Info

Publication number: WO2022041635A1
Application number: PCT/CN2021/071624
Authority: WO
Inventors: 王金峰
Original assignee: 宁波圣捷喷雾泵有限公司
Priority date: 2020-08-26
Filing date: 2021-01-14
Publication date: 2022-03-03
Also published as: CN112173409A

Abstract

A foam pump, comprising a pressing pump head (1), a screw cap (2), a pump body (3), a foaming assembly (4), a piston assembly (5), and a valve (6). An outer cylinder (104) and an inner cylinder (105) are provided on the pressing pump head (1). An upper cavity (200) is integrally formed on the screw cap (2) in an extending manner. The inner cylinder (105) is inserted into the upper cavity (200). An air inlet cavity (13) communicating with external gas is formed between the outer cylinder (104) and the upper cavity (200). An all-plastic closed spring (54) is pressed between the inner cylinder (105) and the upper cavity (200). An air inlet hole (14) is formed in the upper end of the all-plastic closed spring. An air inlet channel (15) is formed between the all-plastic closed spring and the outer wall of the inner cylinder. In the foam pump, the external gas is introduced through the interior of the closed spring, the spring is of an all-plastic structure and the elastic force thereof is variable, and the foam spraying amount can be adjusted according to the strength of a user during a pressing process, so that the comfort of pressing is improved, the foaming effect is good, and the foam lasts for a long time.

Description

a foam pump

technical field

The invention relates to the technical field of foam pumps, in particular to a spring-mounted foam pump with a spring arranged between a pump head and a screw cover.

Background technique

In the prior art, in order to facilitate the use of cleaning liquids such as face wash, hand soap, and shower gel, most of them adopt a small pressure pump structure. Among the small pressure pump structures, the foam pump is the most used, and the principle of the foam pump is to pump out the liquid. When the gas and liquid are mixed to form foam. With the continuous improvement of people's living standards, the use of foam pumps is increasing, resulting in more and more waste foam pumps, which will undoubtedly cause more and more environmental pollution. Utilizing and reducing pollution is the primary problem. At the same time, due to the use of metal springs in the existing foam pump, it is not environmentally friendly, and the stubborn coefficient of the spring is constant once it is made. The built-in spring is not an external spring. In the process of pressing the pump head, due to the need to overcome the elastic force formed by the stubborn coefficient of the spring, the pressing will feel heavy, and the hand feeling effect is not very ideal. Although the pressing force is not strong, there are problems such as poor foaming effect, and various problems such as short foam duration.

Therefore, the purpose of this application is to design a fully plastic structure for all parts, which can be fully recycled, environmentally friendly and pollution-free. At the same time, during the entire process of pressing down on the pump head, the elastic force of the spring will be different due to the different down pressure. , the comfort of manual pressing is increased, and the hand feeling effect is good. The down pressure and the compressed gas inside the spring together produce a force on the compressed gas piston. The gas inside the cylinder can be quickly compressed, and the gas and liquid are fully and quickly mixed and foamed. According to the pressing force, Different amounts of foam can be achieved, and the foaming effect is good, the foam lasts for a long time, and the sealing performance is good.

Chinese patent document (announcement date: April 21, 2020, announcement number: CN111038842A) discloses an all-plastic foam pump, including a press head, a net, a screw thread, a large piston, a connecting rod, a valve, an elastomer, and a secondary column , a small piston, a piston seat, a sphere and a body, the gas-liquid guiding device includes a gas-liquid mixing chamber provided on the top plate of the seat body, a guiding column located in the gas-liquid mixing chamber and connected to the top plate, and a gas-liquid mixing chamber on the top plate. Several gas-liquid mixing holes are arranged around the guide column, and the lower end of the gas-liquid mixing chamber is provided with a gas guide groove; the guide column extends into the connecting pipe, there is a gap between the guide column and the connecting pipe, and the gas-liquid mixing chamber The lower end is fitted with the partition between the upper cavity and the lower cavity. Due to the adoption of such a structure, the air flow surrounds the liquid flow, and then pressurized and diffused, no vortex is generated, the atomization performance is improved, and the flow rate is accelerated.

The above technical solution discloses a pressure spring whose elastic body is a coil, and the pressure spring is made of rubber or plastic material by one-time molding, and the wire body is hollow or solid; although the rubber or plastic spring is used in this technical solution, because it adopts a helical spring. Although the spring adopts an external structure, it also exists in the process of using that because the inner cavity of the cylinder is fixed, the gas inside the cylinder can only be mixed with the liquid when it reaches a certain pressure during the pressing process, so as to achieve a certain foaming effect. So that the gas and liquid mixed foaming effect is poor, and the amount of foaming can not be changed according to needs and other problems.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a foam pump. All the parts of the foam pump are all plastic structures, which can be fully recycled and are environmentally friendly and pollution-free. Between the head and the screw cap, the external air is sucked in through the closed spring. The closed spring adopts an all-plastic structure. Compared with the metal spring, its elastic force is not fixed. During the pressing process, it can be adjusted according to the user's strength. , to achieve the adjustment of the amount of bubble spray, and during the pressing process, due to the internal air intake of the spring, the comfort of pressing is increased, and the down pressure and the compressed gas inside the spring work together to exert a force on the compressor piston, and the gas inside the cylinder can be uniformly compressed. , The gas compression ratio is stable, the gas and liquid can be fully mixed and foamed, the foaming effect is good, the foam lasts for a long time, and the sealing performance is good. Meanwhile, another object of the present invention is to provide a foam pump that can be adapted to liquid containers of different shapes.

The technical scheme adopted by the present invention to achieve the purpose of the invention is: a foam pump, comprising a pressing pump head, a screw cap, a pump body, a foaming component, a piston component and a valve member, and the pressing pump head is provided with an outer cylinder The upper cavity is integrally extended on the screw cap; the inner cylinder is inserted into the upper cavity, and the outer cylinder and the upper cavity form a communication between the external gas The air inlet cavity, the all-plastic closed spring is pressed between the inner cylinder and the upper cavity, the upper end of the all-plastic closed spring is provided with an air inlet hole, and the all-plastic closed spring is An air intake passage is formed between it and the outer wall of the inner cylinder.

In view of the defects of the existing foam pump, the foam pump has a new design for the spring, using a fully plastic closed spring, and the closed spring is set between the pump head and the screw cover, so that the external gas can pass through the closed spring. The inside of the type spring enters the inside of the cylinder of the foam pump. During operation, the pressing force and the air pressure generated by the compressed gas of the spring act on the piston assembly of the foam pump, so that the operation of the piston assembly to compress the gas in the cylinder of the foam pump is more uniform. , the upper surface of the piston assembly is subjected to the uniform action of air pressure and the action of the pressing force, which makes the piston assembly more gentle in the process of pressing down the compressed gas and compressed liquid, and the operating comfort is increased. The size is adjusted by the pressing force applied by the operator, and the difference is the constant elastic force of the metal spring, which makes the operation feel better and more comfortable. Moreover, the amount of bubbles can be adjusted according to the pressing force, that is, the amount of bubbles sprayed is small when the pressing force is small, and the amount of bubbles sprayed is large when the pressing force is large, which can meet the needs of different users, and is also conducive to saving and environmental protection. . During the use of the foam pump, when the pump head is pressed down, the closed spring is compressed, and the gas inside the intake passage is also compressed, generating air pressure to act on the piston assembly, and the compressed air piston assembly is pressed Under the dual action of pressure and compressed gas, it moves downward to compress the gas inside the cylinder, so that the gas inside the foam pump cylinder is uniformly compressed, the gas compression ratio changes stably, and the gas can be stably mixed with the liquid for foaming. The compression ratio of the gas foamed by mixing is uniform, so that in the process of mixing with the liquid, the foaming effect in the foaming component can be more uniform and better, and the foam after foaming can last longer and be more delicate. The closed spring structure is adopted in the foam pump, the elastic force of the spring can be changed, the pressing feeling is good, and it can meet the requirements of different groups of people. It can realize the adjustment of the amount of foam, avoid excessive extrusion waste, and is conducive to saving. At the same time, the all-plastic closed spring in the foam pump is completely isolated from the liquid and will not be polluted by the liquid, which is more environmentally friendly and pollution-free.

Preferably, the all-plastic closed spring is an integrated closed spring made of PP resin material, the all-plastic closed spring is provided with a spring inner cavity, and the two ends of the all-plastic closed spring are respectively A spring sealing pressure seat is provided, and the air inlet hole is opened on the upper spring sealing pressure seat. The spring is an integrated closed spring made of PP resin material, which overcomes the defect that once the metal spring is formed, the stubborn coefficient is constant, and the stubborn coefficient of the spring can be changed at any time. It has different functions and can meet the pressing needs of different operators. The use of closed springs solves the defect that the existing foam pump parts cannot realize the all-plastic environmental protection design, and realizes the all-plastic production of the foam pump, which can be recycled. At the same time, through this all-plastic spring, under the premise of ensuring the elastic performance of the spring, an air intake channel is set inside the spring, so that the elastic force of the spring can be adjusted, and the closed spring can also realize the function of pressing gas, which is the piston assembly. Provide a uniform air pressure, and cooperate with the pressing force to compress the gas inside the cylinder, resulting in a stable gas compression ratio, thereby improving the foaming performance.

Preferably, the screw cap is provided with a screw threading structure that can be screwed at any angle. The existing screw caps are all designed with standard threads in the manufacturing process, so the liquid containers used with them must also be designed to be standard models. Such standardized design limits liquid containers of different shapes or types, especially non-standard liquids. The connection and use of containers cannot meet the general design requirements. Based on this, the screw cap is designed with a screw thread structure that can be tightened at any angle of the connection of any shape or type of liquid container, and several directions or rotation directions can be designed according to different liquid containers. , with 3 degrees of one tooth design, 120 design of tooth structures can be realized to meet the suitable needs of different liquid containers.

Preferably, the screw cap is an integral all-plastic material member, the screw cap includes a screw cap body with internal threads, and a spring pressure is provided on the inner wall of the connection between the upper cavity and the screw cap body. The inside of the screw cover body is provided with a pump head movable cavity, the inner wall of the screw cover body is provided with a pump body socket, and the lower opening of the screw cover body is provided with a rotation stop structure. The screw cover is made of one-piece all-plastic material components, which is convenient to manufacture and reduces the number of parts, making the overall foam pump more streamlined and more compact. The screw cover is provided with internal threads, and the internal threads are provided with a number of thread threading structures , can realize the adaptation of any position of the liquid container, and can meet the connection of liquid containers of different shapes or models. The setting of the active chamber of the pump head is to facilitate the pump head to be pressed up and down to realize the operation of squeezing out bubbles, and the setting of the pump body socket is to facilitate the sealing plug connection with the pump body and the connection with the pump body to achieve Universal fit requirements. The setting of the anti-rotation structure is to prevent children from accidentally opening the screw cap and causing the liquid container to be disengaged and liquid leakage to occur.

Preferably, the pressing pump head includes a spray head and a pump head body, the spray head is provided with a bubble-producing cavity inside, the bubble-producing cavity is arranged obliquely, and the outer cylinder body and the inner cylinder body are coaxial. The wire is arranged on the pump head body, the lower part of the inner cylinder is provided with an anti-detachment structure, and the foaming component is arranged in the foaming cavity and/or inside the inner cylinder; the inner cylinder and the pump head A spring mounting ring seat is arranged at the connection of the body. The spray head is for the spraying of foam, and the inclined setting of the foaming cavity is conducive to the spraying of foam, and the outer cylinder can press the pump head to move up and down, and the inner cylinder is convenient for the setting of the closed spring, the air pressure piston and the foaming component. .

Preferably, the pump body is connected with the screw cap seal plug-in, the pump body is an adjustable spray volume pump body; the upper end of the pump body is provided with a plug-in connection structure, and the pump body is provided with a plug-in connection structure. The side wall is provided with an air outlet that communicates with the liquid container, and the inside of the pump body is integrally provided with a cylinder, a hydraulic cylinder and an upper liquid valve seat. The pump body is set as a pump body with adjustable spray volume to meet the needs of different spray bubble volumes. The adjustable spray volume pump body can be replaced, or it can be realized by changing the size of the hydraulic cylinder, or by compressing the cylinder. The amount of internal gas to achieve. The air outlet on the pump body is to realize that the external gas can enter the liquid container during the liquid filling process, so as to realize the liquid filling operation, and the cylinder, the hydraulic pressure cylinder and the liquid filling valve seat are integrally arranged inside the pump body to realize the piston assembly. The linkage setting of the air pressure, hydraulic pressure and other actions, press the liquid at the same time during the air compression process, and finally realize the mixed foaming. Liquid operation.

Preferably, the piston assembly includes a piston rod assembly with a liquid channel, a compressed air piston assembly with an air intake and upper air structure, and a hydraulic piston; the upper end of the piston rod assembly and the compressed air piston assembly are movable open and close. A gas-liquid confluence channel is formed between the upper end of the piston rod assembly and the pneumatic piston assembly, and the lower end of the piston rod assembly is movably connected with the hydraulic piston in an open and closed manner. The gas-liquid confluence channel enables the gas pressed up by the gas-pressing piston assembly to mix with the liquid pressed by the pressing-hydraulic piston to ensure the foaming effect.

Preferably, the piston rod assembly includes a piston rod body and an ejector pin movably arranged inside the piston rod body; the liquid channel is formed between the ejector pin and the inner wall of the piston rod body. The piston rod assembly is set in a modular structure. Through the cooperation between the piston rod body and the thimble, the rapid on-off of the upper liquid can be realized, and the sealing performance can be good. A liquid channel is arranged between, so that the liquid does not contact with other components, and will not cause pollution to other components, and this structure is quick to apply liquid and can achieve a good foaming effect.

Preferably, the piston rod body is an integral structure, the interior of the piston rod body is provided with a cavity that runs through the upper and lower sides, and the upper end of the piston rod body is provided with an inclined liquid outlet valve cavity that cooperates with a thimble to realize opening and closing , the upper ring of the outer wall of the upper part of the piston rod body is provided with a shrapnel seat with an upper air port. The upper end of the piston rod body is provided with an inclined liquid outlet valve cavity, which can realize the rapid opening and closing of the upper liquid channel by cooperating with the thimble. Backflow into liquid container. The setting of the shrapnel seat is to realize the installation and positioning of the gas valve plate, and at the same time realize the opening and closing of the upper air port through the gas valve plate. When the air pressure inside the cylinder is compressed, the gas valve plate opens, and the gas enters the gas-liquid through the upper air port. The flow channel is mixed with the liquid to achieve foaming.

Preferably, the ejector pin is an integral structure, the upper end of the ejector pin is provided with an inclined sealing valve body structure, and the lower end of the ejector pin is provided with a bidirectional sealing valve body structure; the bidirectional sealing valve body structure and the pressure An upper liquid channel is formed between the liquid pistons, and the thimble moves up and down along the piston rod body to realize the on-off of the lower upper liquid channel and the on-off of the upper liquid channel and the gas-liquid confluence channel. The upper end of the thimble is provided with an inclined sealing valve body structure, which can realize the rapid opening and closing of the upper liquid channel, while the lower end of the thimble is equipped with a two-way sealing valve body structure, which can realize rapid linkage, so as to realize the rapid opening and closing of the upper liquid port of the hydraulic chamber. .

Preferably, the compressed air piston assembly includes a compressed air piston and a gas valve plate, and the gas valve plate is inserted inside the compressed air piston and cooperates with the piston rod assembly to realize air intake and air intake. The gas-pressing piston assembly is provided with a gas-pressing piston and a gas valve plate. The cooperation of the gas valve plate and the gas-pressing piston not only realizes the opening and closing of the external gas into the cylinder, but also realizes that the gas inside the cylinder is compressed and discharged and the liquid is foamed.

Preferably, the compressed air piston is an integral all-plastic component, and the compressed air piston includes a connecting seat and a piston body; the outer wall of the connecting seat is provided with an anti-separation protrusion, and the outer wall of the connecting seat is connected to the outer wall of the connecting seat. Press the inner seal of the pump head to connect, and the inside of the connecting seat is sequentially provided with a foaming component mounting seat, a gas-liquid mixing chamber and an upper air chamber from top to bottom; the piston body and the connecting seat are arranged on a coaxial line There is a valve plate mounting seat, and an air inlet groove is arranged at the connection between the valve plate mounting seat and the valve body. The above-mentioned structure of the integral type of compressor and piston realizes the linkage design of the whole foam pump, and the sealing performance is good. The foaming component is arranged inside the installation cavity of the foaming component. The bubble effect is better, and the upper air chamber is the air passage for the gas inside the cylinder to enter the gas-liquid mixing chamber. The inlet groove is provided at the connection between the valve plate mounting seat and the valve body to facilitate the entry of external air into the cylinder. The piston body and the inner wall of the cylinder are connected in a movable seal up and down, and the up and down movement of the piston body realizes the compression of the gas in the cylinder or the air inlet of the liquid container.

Preferably, the gas valve plate is an integral all-plastic material component, and the gas valve plate includes a valve plate body, an inner valve plate and an outer valve plate.

Preferably, the hydraulic piston is an integral all-plastic component, the hydraulic piston includes an outer piston body and an inner valve seat, and the outer piston body and the inner wall of the hydraulic cylinder are movably connected up and down in a sealing manner. A piston assembly insertion cavity is arranged between the inner valve seat and the outer piston body. The hydraulic piston is set so that the outer piston body and the inner wall of the hydraulic cylinder cooperate with the up and down movement to compress the liquid, thereby realizing the liquid feeding operation, and the internal valve seat is set to realize the opening and closing of the liquid feeding port in cooperation with the ejector pin. It also facilitates the connection between the piston rod body and the hydraulic piston, thereby realizing the linkage operation.

Preferably, the foaming component includes an initial foaming component and a foaming foaming component, the initial foaming component is arranged at the connection end between the pump head and the pump body, and the foaming and foaming component is detachable It is set at the bubble outlet of the press pump head. The foaming component can be provided with an initial foaming component and a foaming foaming component according to different foaming requirements. The initial foaming component is arranged above the gas-liquid mixing chamber, and foaming is performed in the first time after the gas and liquid are mixed. In order to achieve more delicate foaming, foaming components can be set at the foam outlet to meet different user needs.

Preferably, the initial foaming component includes a foam body and a double-layer foaming net, the foam body is provided with a foam cavity, and the upper and lower ends of the foam cavity are respectively provided with installation grooves, The double-layer foamed net is arranged inside the installation groove; the foam body and the double-layered foamed net are respectively one-piece all-plastic material components, and the double-layered foamed net includes a coarse net and a fine net; The foaming hair component includes a foaming foam and a fine foaming net. The foaming net can be designed to replace the foaming net with different meshes according to different liquids, and the double-layer foaming net can be a coarse net on the lower part and a fine net on the upper part to realize double-layer foaming, step-by-step foaming, and reach It can meet the requirements of more delicate foaming and foaming, and at the same time, it can also achieve the requirements of longer duration of foaming. The setting of the foaming and foaming components is generally for further fine foaming, which can be selected and used according to the liquid and foaming requirements.

Preferably, the valve member is an integrated all-plastic air valve, the valve member is provided with a flat liquid upper port, and the valve member is arranged inside the pump body for opening and closing the connection between the liquid container and the pump body. inter-liquid channel. .

The beneficial effects of the present invention are:

1) The foam pump adopts a closed spring, and the air is sucked through the inside of the spring, so that when the compressed air piston assembly compresses the air inside the cylinder, it is subjected to the double action of the pressing force and the air pressure of the spring compression, so that the elastic force of the spring can be adjusted. The feeling of comfort is enhanced, because the compressed gas inside the spring acts evenly on the compressed gas piston, so that the gas in the cylinder can be pressurized evenly, and the gas compression ratio is stable. The gas-liquid confluence channel is evenly mixed with the gas, which effectively improves the foaming effect, making the foamed foam lasts longer and more delicate.

2) The foam pump can realize the adjustment of the size of the foam according to the size of the pressing force during use, which can meet the use requirements of different groups of people, avoid excessive squeezing and waste, and is conducive to saving.

3) The liquid in the foam pump is filled with liquid through the piston rod assembly, and other components are completely isolated from the liquid, so they will not be polluted by the liquid, which is more environmentally friendly and pollution-free.

4) The screw cap is designed with a screw thread structure that can be tightened at any angle for the connection of liquid containers of any shape or type. According to the different liquid containers to be fitted, the screw thread structure can be designed in several directions or in different directions. Meet the suitable needs of different liquid containers.

5) Multiple foaming makes the foaming more delicate and lasts longer.

6) The pump body with adjustable spray volume is adopted to meet the needs of different spray volumes.

7) All components are all-plastic structure, which is conducive to recycling and is more green and environmentally friendly.

Description of drawings

Fig. 1 is a kind of structural representation of foam pump of the present invention;

Fig. 2 is a kind of structural representation of closed spring in the present invention;

Fig. 3 is a kind of structural representation of screw cap in the present invention;

Fig. 4 is another angle structure schematic diagram of screw cap in the present invention;

Fig. 5 is the second structure schematic diagram of screw cap in the present invention;

Figure 6 is a schematic diagram of the structure of the part of the screw cap internal screw threading structure of the present invention;

Fig. 7 is a kind of structural representation of pressing pump head in the present invention;

Fig. 8 is a kind of structural representation of piston rod assembly in the present invention;

Fig. 9 is the top view of Fig. 8;

10 is a schematic diagram of an exploded structure of the piston rod assembly in the present invention;

Fig. 11 is a kind of structural schematic diagram of the medium pressure gas piston assembly of the present invention;

Fig. 12 is a kind of structural representation of the medium pressure gas piston of the present invention;

13 is a schematic structural diagram of a medium-pressure hydraulic piston of the present invention;

Fig. 14 is a kind of structural schematic diagram of the initial foaming assembly in the present invention;

Fig. 15 is a kind of structural schematic diagram of the foaming and foaming assembly in the present invention;

Fig. 16 is a kind of structural representation of the pump body of the present invention;

Fig. 17 is a kind of structural schematic diagram of valve member in the present invention;

Fig. 18 is the second structure schematic diagram of the foam pump of the present invention;

19 is a schematic diagram of a foam spraying process of the foam pump of the present invention;

Fig. 20 is a schematic diagram of the process of air intake and liquid loading of the foam pump of the present invention;

In the figure: 1. Press the pump head, 101, the spray head, 102, the pump head body, 103, the bubbling cavity, 104, the outer cylinder, 105, the inner cylinder, 106, the spring mounting ring seat, 107, the anti-drop structure , 2, screw cap, 200, upper cavity, 201, screw thread structure, 202, screw cap body, 203, press pump head movable cavity, 204, pump body socket, 205, anti-rotation structure, 206, spring pressure seat , 3, pump body, 31, cylinder, 32, hydraulic cylinder, 33, upper fluid valve seat, 301, card connection structure, 302, air outlet, 4, foaming components, 41, initial foaming components, 411, Foam, 412, Double-layer foam net, 413, Foam cavity, 414, Mounting groove, 42, Foaming assembly, 421, Foaming, 422, Fine foaming net, 5, Piston assembly , 51, piston rod assembly, 511, piston rod body, 512, thimble, 513, cavity, 514, inclined outlet valve cavity, 515, shrapnel seat, 517, inclined sealing valve body structure, 518, two-way sealing valve body structure , 52, liquid channel, 54, closed spring, 541, spring inner cavity, 542, spring seal pressure seat, 55, pneumatic piston assembly, 550, anti-separation protrusion, 551, pneumatic piston, 552, gas valve plate, 5520 , valve body, 5521, inner valve, 5522, outer valve, 553, connecting seat, 554, piston body, 555, foaming component mounting seat, 556, gas-liquid mixing chamber, 557, upper air chamber, 558, Valve plate mounting seat, 559, Inlet groove, 56, Hydraulic piston, 561, Outer piston body, 562, Inner valve seat, 563, Piston assembly insertion cavity, 6, Valve piece, 7, Gas-liquid confluence channel, 8, Adjustable air pressure chamber, 9, upper air port, 10, upper liquid channel, 11, liquid container, 12, suction pipe, 13, air inlet chamber, 14, air inlet hole, 15, air inlet channel.

detailed description

The technical text of the present invention will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings.

Example 1:

In the embodiment shown in Fig. 1 and Fig. 2, a foam pump, all components of the foam pump adopt a recyclable all-plastic structure, including:

Pressing the pump head 1 is used to press the operating part for foaming and foaming; the pressing pump head is provided with an outer cylinder 104 and an inner cylinder 105;

The screw cover 2 is used to connect the pump body and the connecting part of the liquid container; the screw cover 2 is integrally provided with an upper cavity 200; the inner cylinder 105 is inserted into the upper cavity 200, and the Between the outer cylinder 104 and the upper cavity 200, an intake cavity 13 for communicating with external air is formed, and an all-plastic closed spring 54 is pressed between the inner cylinder 105 and the upper cavity 200. The upper end of the plastic enclosed spring 54 is provided with an air inlet 14, and an air inlet channel 15 is formed between the fully plastic enclosed spring 54 and the outer wall of the inner cylinder;

The pump body 3, the main body part of the foam pump, the pump body 3 is connected with the screw cap 2 in a sealed plug-in connection, and the inside of the pump body 1 is integrally provided with a cylinder 31, a hydraulic cylinder 32 and an upper liquid valve seat 33;

The foaming assembly 4 is arranged inside the pressing pump head 1 for realizing foaming;

The piston assembly 5 is arranged inside the pump body 3 and is linked with the pressing pump head 1, and is used for compressing the gas in the cylinder 31 to realize the gas supply and compressing the liquid in the hydraulic cylinder 32 to realize the liquid outlet;

The piston assembly 5 includes a piston rod assembly 51 with a liquid passage 52, a compressed air piston assembly 55 with an air intake and upper air structure, and a hydraulic piston 56; the upper end of the piston rod assembly 51 is connected to the compressed air piston assembly 55. A movable open-close connection, a gas-liquid confluence channel 7 is formed between the upper end of the piston rod assembly 51 and the compressed air piston assembly 55, and the lower end of the piston rod assembly 51 is movable open and closed connection with the hydraulic piston 56; also include,

The valve member 6 is a member disposed inside the upper liquid valve seat 33 for opening and closing the liquid passage between the liquid container and the hydraulic cylinder 32 .

As shown in FIG. 2, the all-plastic closed spring 54 is an integral closed spring made of PP resin material. The all-plastic closed spring is provided with a spring inner cavity 541, and the two parts of the all-plastic closed spring are provided. The ends are respectively provided with a spring sealing pressure seat 542 , and the air inlet hole 14 is opened on the upper spring sealing pressure seat 542 . The all-plastic closed spring is preferably an integrated closed spring made of PP resin material to solve the defect that the existing foam pump parts cannot realize the all-plastic environmental protection design, and can be recycled. At the same time, this is also the purpose of the invention of the present application. Through this all-plastic closed spring, on the premise of realizing the spring performance, the internal design of the intake channel spring is realized, so that the closed spring can not only achieve the performance of the spring, but also It can also realize the function of air compression, provide uniform air pressure for the air compression piston assembly, and cooperate with the pressing force to realize the compression of the gas inside the cylinder, resulting in a stable gas compression ratio, thereby improving the foaming performance.

As shown in FIG. 3 and FIG. 4 , the screw cap 2 is provided with a screw threading structure 201 which can be screwed at any angle. The screw cap 2 is an integral all-plastic material component, and the screw cap 2 includes a screw cap body 202 and an upper cavity 200. The inner wall of the connection between the upper cavity 200 and the screw cap body 202 is provided with a screw cap body 202. The spring pressing seat 206, the screw cap body 202 is provided with a pump head movable cavity 203, the inner wall of the screw cap body 202 is provided with a pump body socket 204, and the lower opening of the screw cap body 202 is provided There is an anti-rotation structure 205 . The main function of the screw cap 2 is to connect the pump with the liquid container 11, and the existing screw cap 2 is designed with standard threads in the manufacturing process, so the liquid container used with it must also be designed to be Standard models, such a standardized design, restricts the connection and use of liquid containers of different shapes or types, especially non-standard liquid containers, and cannot achieve universal design requirements. Based on this, the screw cap 2 is internally designed with a screw thread structure that can be tightened at any angle for the connection of liquid containers of any shape or model, and can be designed according to different liquid containers. According to the user's requirements, any one or several types of screw threading structures 201 can be set inside the screw cap. As shown in Figure 5, a screw threading structure is provided inside the screw cap. There are many kinds of thread-starting structures 201 , as shown in FIG. 6 , with 3-degree one-starting design, the screw cap 2 can realize 120 kinds of screw-starting structure designs. These thread-starting structures can be used in any combination, or It can be used alone or at the same time, which can meet the adaptation needs of different liquid containers, and realize the universal adaptation design of standard or non-standard liquid containers. Another function of the screw cover 2 is to facilitate the plug connection of the pump body 3. Therefore, the pump body socket is provided on it to facilitate the sealing plug connection with the pump body. This plug-in connection realizes the universality of the connection. . The anti-rotation structure is arranged on the screw cap to effectively prevent the liquid container from being disengaged and leaking due to the accidental opening of the screw cap by children.

As shown in FIG. 7 , the press pump head 1 includes a spray head 101 and a pump head body 102 . The spray head 101 is provided with a bubble outlet channel 103 , and the bubble outlet channel 103 is arranged obliquely. The outer cylinder 104 and the inner cylinder 105 are coaxially arranged on the pump head body 102, the lower part of the inner cylinder 105 is provided with an anti-detachment structure 107, and the foaming component 4 is arranged in the foaming cavity 103 and /or inside the inner cylinder 105; a spring mounting ring seat 106 is provided at the connection between the inner cylinder 105 and the pump head body 102. The press pump head is made of PP material and is integrally provided with a spray head 101 and a pump head body 102. The spray head is for the spraying of foam, and the inclined setting of the foaming cavity is conducive to the effective spraying of foam, and the setting of the sliding pump head body 102 is for the purpose of The outer cylinder body 104 and the inner cylinder body 105 are coaxially arranged, so that the pressing pump head can move up and down, and the installation of the air pressure piston and the foaming component is also convenient.

As shown in FIGS. 8 and 9 , the piston rod assembly 51 includes a piston rod body 511 and a thimble 512 movably arranged inside the piston rod body 511 ; Road 52. The piston rod body 511 has a one-piece structure. The piston rod body 511 is provided with a cavity 513 that runs through the upper and lower sides. The upper end of the piston rod body 511 is provided with an inclined liquid outlet valve cavity 514 that cooperates with the ejector pin 512 to realize opening and closing. , the upper ring of the upper outer wall of the piston rod body 511 is provided with an elastic sheet seat 515 with an upper air port 9 . As shown in FIG. 10 , the ejector pin 512 has a one-piece structure, the upper end of the ejector pin 512 is provided with an inclined sealing valve body structure 517, and the lower end of the ejector pin 512 is provided with a bidirectional sealing valve body structure 518; The upper liquid channel 10 is formed between the valve body structure 518 and the hydraulic piston 56 , and the thimble 512 moves up and down along the piston rod body 511 to realize the on-off of the lower upper liquid channel 10 and the connection between the upper liquid channel 52 and the gas-liquid confluence channel 7 . on and off. The piston rod assembly 51 is set in a modular structure. Through the cooperation between the piston rod body and the thimble, the rapid on-off of the liquid can be realized, and the sealing performance can be good. A liquid channel 52 is arranged between the piston bodies, the liquid is completely isolated from other components, and will not cause pollution to other components such as the spring, and this structure is fast in liquid and can achieve good foaming effect. The upper end of the piston rod body is provided with an inclined liquid outlet valve cavity, which can realize the rapid opening and closing of the upper liquid channel by cooperating with the thimble. Backflow into liquid container. The setting of the shrapnel seat is to realize the installation and positioning of the gas valve plate, and at the same time realize the opening and closing of the upper air port through the gas valve plate. When the air pressure inside the cylinder is compressed, the gas valve plate opens, and the gas enters the gas-liquid through the upper air port. The flow channel is mixed with the liquid to achieve foaming. The upper end of the thimble is provided with an inclined sealing valve body structure, which can realize the rapid opening and closing of the upper liquid channel, while the lower end of the thimble is equipped with a two-way sealing valve body structure, which can realize rapid linkage, so as to realize the rapid opening and closing of the upper liquid port of the hydraulic chamber. .

As shown in FIG. 11 , the compression piston assembly 55 includes a compression piston 551 and a gas valve plate 552 . The gas valve plate 552 is inserted inside the compression piston 551 and cooperates with the piston rod assembly 51 to realize air intake and air intake. As shown in FIG. 12 , the compressed air piston 551 is an integral all-plastic component, and the compressed air piston 551 includes a connecting seat 553 and a piston body 554; the outer wall of the connecting seat 553 is provided with an anti-separation protrusion 550 to prevent the air from coming off. The protrusion 550 cooperates with the anti-detachment structure 107 on the pressing pump head to realize the sealing and clamping between the outer wall of the connecting seat 553 and the interior of the pressing pump head 1. The inside of the connecting seat 553 is sequentially provided with foaming component mounting seats from top to bottom. 555, the gas-liquid mixing chamber 556 and the upper air chamber 557; the piston body 554 is provided with a valve plate mounting seat 558 coaxially with the connecting seat 553, and the valve plate mounting seat 558 is provided at the connection between the piston body 554 There are air intake slots 559 . The gas valve plate 552 is a one-piece all-plastic material component, and the gas valve plate 552 includes a valve plate body 5520 , an inner valve plate 5521 and an outer valve plate 5522 . The air intake groove 559 and the upper air port 9 form the air intake and air intake structure on the compressed air piston assembly 55 . The compressed gas piston assembly is mainly used to compress the gas inside the cylinder, so that it enters the gas-liquid mixing chamber and mixes with the liquid to realize foaming. At the same time, it also allows the external gas to enter the cylinder to achieve air intake. There is a pressurized gas piston and a gas valve plate. The cooperation of the gas valve plate and the compressed gas piston not only realizes the opening and closing of the external gas into the cylinder, but also realizes that the gas inside the cylinder is compressed and discharged and the liquid is foamed. The compressed air piston is made of PP resin material in one piece, which can realize the linkage design of the entire foam pump, which is sliding and sealing with the inner wall of the cylinder. The foaming component is set inside the installation cavity of the foaming component. It can be more fully mixed, and the foaming effect is better. The gas inside the cylinder is compressed and enters the gas-liquid mixing chamber through the upper air chamber to mix with the liquid to realize foaming. The external air enters the cylinder through the intake groove at the connection between the valve plate mounting seat and the valve body. During the foaming process by pressing the pump head, since the air pressure inside the closed spring is smaller than the air pressure inside the cylinder, the air inlet groove is closed, and the gas inside the closed spring acts on the surface of the compressed air piston, which has a negative impact on the piston. A downward pressure is generated, and the downward movement of the compressed air piston is realized together with the pressing of the pump head. The piston body and the inner wall of the cylinder are connected with the upper and lower movable seals. Through the up and down movement of the piston body, the gas in the cylinder is compressed or the air inlet of the liquid container is released, so that the gas enters the liquid container, and the pressure inside the liquid container is higher than that of the hydraulic cylinder. pressure, so as to realize the liquid-up action.

As shown in FIG. 13 , the hydraulic piston 56 is a one-piece all-plastic component made of PP resin material. The hydraulic piston 56 includes an outer piston body 561 and an inner valve seat 562. The outer piston body 561 and the outer piston body 561 The inner wall of the hydraulic cylinder 32 is connected in a movable sealing manner up and down, and a piston assembly insertion cavity 563 is provided between the inner valve seat 562 and the outer piston body 561 . The lower end of the piston rod body 511 is inserted into the plug cavity 563 of the piston assembly and drives the hydraulic piston 56 to move up and down. The outer piston body on the hydraulic piston cooperates with the inner wall of the hydraulic cylinder to move up and down to compress the liquid, so as to realize liquid loading. The internal valve seat cooperates with the thimble to realize the opening and closing of the upper liquid port, and the connection between the piston rod body and the hydraulic piston, thereby realizing the linkage operation.

As shown in FIG. 14 and FIG. 15 , the foaming component 4 includes an initial foaming component 41 or/and a foaming foaming component 42 , and the initial foaming component 41 is arranged at the connecting end of the pump head 1 and the pump body 3 , the foaming and foaming assembly 42 is detachably arranged at the foaming port of the pressing pump head 1 . The initial foaming assembly 41 includes a foaming body 411 and a double-layer foaming net 412. The foaming body 411 is provided with a foaming cavity 413, and the upper and lower ends of the foaming cavity 413 are respectively provided with installation grooves 414. , the double-layer foamed net 412 is arranged inside the installation groove 414; the foamed body 411 and the double-layered foamed net 412 are respectively one-piece all-plastic material components, and the double-layered foamed net 412 includes Coarse mesh and fine mesh; the foaming component 42 includes a foaming body 421 and a fine foaming mesh 422 . Foaming components can be provided with initial foaming components and foaming foaming components according to different foaming requirements, or only initial foaming components can be designed. The initial foaming component is arranged above the gas-liquid mixing chamber, and foaming is performed in the first time after the gas-liquid mixing. Meet different user needs. The foaming net can be replaced with different mesh foaming nets according to different liquids, and the double-layer foaming net can be a coarse net on the lower part and a fine net on the upper part to realize double-layer foaming and foaming step by step. It can meet the requirements of more delicate foaming and foaming, and at the same time, it can also achieve the requirements of longer duration of foaming. The setting of the foaming and foaming components is generally for further fine foaming, which can be selected and used according to the liquid and foaming requirements.

As shown in Figure 16, the pump body 3 is an integral all-plastic material component made of PP resin, and the pump body 3 is an adjustable spray volume pump body; the upper end of the pump body 3 is provided with a plug-in connection In structure 301, the side wall of the pump body 3 is provided with an air outlet 302 that communicates with the liquid container. The plug-in connection structure 301 is inserted inside the pump body socket 204 of the screw cap, and the pump body 3 is set as a pump body with adjustable spray volume to meet the needs of different spray volumes. The adjustable spray volume pump body can be replaceable. It can also be achieved by changing the size of the hydraulic cylinder, or by changing the pressure chamber inside the cylinder.

As shown in FIG. 17 , the valve member 6 is an integrated all-plastic air valve made of PP resin, and the valve member 6 is provided with a flat upper liquid port 61 .

Example 2:

In the embodiment shown in FIG. 18, a foam pump, the technical solution of which is basically the same as that of Embodiment 1, the difference is: in this embodiment, the foaming component is only provided with an initial foaming component, and no Foam components.

As shown in Figure 19 and Figure 20, the specific operations of the foam pump in the above embodiment are as follows:

As shown in Figure 19, press down the pump head 1, press the pump head 1 to move down, drive the air pressure piston 551 to move down, the closed spring 54 is compressed, and the gas inside the closed spring 54 is compressed to generate air pressure, press The pressing force of the pump head and the air pressure act together on the gas-pressing piston, and the gas-pressing piston 551 moves downward to compress the gas inside the cylinder, so that the compression ratio of the gas increases, and the gas is pressed upward to open the inner valve plate 5521 on the gas valve plate 552, Enter the upper air chamber 557 and the gas-liquid mixing chamber 556; at the same time, when the pump head is pressed down, the piston rod body 511 is moved downward, and the hydraulic piston 56 at the lower end of the piston rod body 511 also moves downward, and the hydraulic piston 56 Due to the frictional force with the inner wall of the hydraulic cylinder 32, the upward jumping action is generated, that is, the sealing cooperation between the two-way sealing valve body structure 518 at the lower end of the ejector pin 512 and the inner valve seat 562 on the hydraulic hydraulic piston 56 is opened, and the ejector pin is opened. The cooperation between the inclined sealing valve body structure 517 at the upper end of 512 and the inclined liquid outlet valve cavity 514 on the piston rod body is also opened, the inner cavity 513 of the piston rod body 511 is connected up and down, the upper liquid channel 10, the liquid channel 52, the gas The liquid confluence channel 7 is connected. At this time, the liquid inside the hydraulic cylinder 32 enters the gas-liquid confluence channel 7 through the upper liquid channel 10 and the liquid channel 52 to be mixed with the gas, and then enters the foaming component 4 for foaming. After the liquid is mixed in the gas-liquid mixing chamber, it enters the coarse mesh and the fine mesh in the initial foaming component 41 to be foamed layer by layer and then ejected through the bubble outlet 103 of the pump head. During the process of extruding the liquid from the hydraulic cylinder, the valve member 6 is pressed by the liquid in the hydraulic cylinder, and is pressed against the inside of the upper liquid valve seat, and the passage between the interior of the liquid container and the hydraulic cylinder is cut off. As shown in Figure 20, after the extrusion and foaming is completed, release the pressing pump head 1, and the pressing pump head is reset under the elastic force of the closed spring. During the reset process, due to the discharge of the gas inside the cylinder, the gas valve plate 552 The upper inner valve plate 5521 returns to seal the upper air port 9. At this time, the external air pressure is greater than the air pressure inside the cylinder, and the air passes through the air inlet chamber 13, the air inlet hole 14, and enters the air inlet passage 15 inside the closed spring, and then , so that the outer valve plate 5522 on the gas valve plate 552 is opened, and the external air enters the interior of the cylinder 31 through the air inlet groove 559. When the external gas enters the cylinder, some gas also enters the liquid container 11 through the air outlet 302. At this time, the air pressure inside the liquid container 11 is greater than the air pressure inside the hydraulic cylinder 32 (the liquid inside the hydraulic cylinder 32 is ejected, and the internal pressure is is lower than the pressure inside the liquid container), the valve member 6 is affected by the pressure inside the liquid container 11, and jumps up to leave the upper liquid space, and the liquid inside the liquid container enters the hydraulic cylinder 32 through the suction pipe 12. Substitute. During the reset process, due to the frictional force between the hydraulic piston and the inner wall of the hydraulic cylinder, the upper fluid channel 10 is sealed.

In view of the defects of the existing foam pump, the foam pump has a new design for the spring, adopts a closed spring structure, and the closed spring is arranged between the pressing pump head and the screw cover, so that the external gas can pass through the closed type. The inside of the spring enters the inside of the cylinder. When this structure is in operation, the pressing force and the air pressure generated by the compressed gas of the spring act together on the gas-pressing piston, so that the operation of the gas-pressing piston assembly compressing the gas inside the cylinder is more uniform, and the upper surface of the gas-pressing piston assembly Under the uniform action of air pressure and the action of pressing force, the piston assembly is more gentle in the process of pressing down the compressed gas and compressed liquid, and the operation comfort is increased. When the pressure is small, the amount of bubbles sprayed is small, and when the pressure is large, the amount of bubbles sprayed is large, which can not only meet the needs of different users, but also is not conducive to saving and environmental protection. In the foam pump, when the pump head is pressed down, the closed spring is compressed, and the gas inside the air inlet channel is also compressed, generating air pressure to act on the air compression piston assembly, and the air compression piston assembly is in The gas inside the cylinder is compressed by moving downward under the dual action of pressure and compressed gas, so that the gas inside the cylinder is uniformly compressed, the gas compression ratio changes steadily, and the gas enters the gas-liquid confluence channel. The liquid inside the hydraulic cylinder is compressed by the hydraulic piston assembly and flows into the liquid channel, and then is pressed into the gas-liquid confluence channel to be mixed with the gas. Because the gas compression ratio inside the cylinder is uniform, it can be mixed with the liquid. In the foam component, the foaming effect is more uniform and better, and at the same time, the foam after foaming can last longer and be more delicate. This closed spring structure is adopted in the foam pump, which can meet the use requirements of different groups of people. No matter how hard the pressure is, the foam can be squeezed out, and the amount of foam can be adjusted according to the pressure, avoiding squeezing. Suppressing too much waste is conducive to saving. At the same time, the all-plastic closed spring in the foam pump is completely isolated from the liquid and will not be polluted by the liquid, which is more environmentally friendly and pollution-free.

The foam pump adopts a closed spring, and the air is sucked through the spring, so that when the compressed air piston assembly compresses the air inside the cylinder, it is subjected to the double action of the pressing force and the air pressure of the spring compression, so that the elastic force of the spring can be adjusted and the operation is comfortable. Because the compressed gas inside the spring acts evenly on the compressed gas piston, the cylinder gas can be pressurized evenly, and the gas compression ratio is stable. The gas-liquid confluence channel is evenly mixed with the gas, which effectively improves the foaming effect, making the foamed foam lasts longer and more delicate. The foam pump can realize the adjustment of the size of the foam according to the size of the pressing force during use, which can meet the use requirements of different groups of people, avoid excessive squeezing and waste, and is conducive to saving. The liquid in the foam pump passes through the inside of the piston rod assembly, and the other components are completely isolated from the liquid, so they will not be polluted by the liquid, which is more environmentally friendly and pollution-free. The screw cap is designed with a screw thread structure that can be tightened at any angle for the connection of liquid containers of any shape or model. According to the different liquid containers to be adapted, the thread structure in several directions or directions can be designed to meet different requirements. Suitable for liquid containers. Multiple foaming makes the foaming more delicate and lasts longer. The pump body with adjustable spray volume is adopted to meet the needs of different spray volume. All components are all-plastic structure, which is conducive to recycling and is more green and environmentally friendly.

Those of ordinary skill in the art will be able to implement the present invention based on the description of the above embodiments. In addition, the above-described embodiments are merely embodiments of the present invention, generally only a part of the embodiments of the present invention, but not all of the embodiments. Therefore, based on the embodiments of the present invention, all other technical documents and embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

Claims

A foam pump, comprising a pressing pump head (1), a screw cover (2), a pump body (3), a foaming assembly (4), a piston assembly (5) and a valve member (6), characterized in that: the An outer cylinder (104) and an inner cylinder (105) are arranged on the pump head of the pump; an upper cavity (200) is integrally extended on the screw cover (2); the inner cylinder (105) Inserted inside the upper cavity (200), the outer cylinder (104) and the upper cavity (200) form an intake cavity (13) communicating with external air, and the inner cylinder (105) An all-plastic closed spring (54) is pressed between the upper cavity (200) and the all-plastic closed spring (54). An air intake passage (15) is formed between the spring (54) and the outer wall of the inner cylinder (105).
A foam pump according to claim 1, characterized in that: the all-plastic closed spring (54) is an integral closed spring made of PP resin material, and the all-plastic closed spring is internally provided with a In the spring inner cavity (541), two ends of the all-plastic closed spring are respectively provided with spring sealing pressure seats (542), and the air inlet holes (14) are opened on the upper spring sealing pressure seat (542).
The foam pump according to claim 1, characterized in that: the screw cap (2) is provided with a screw threading structure (201) which can be screwed at any angle.
A foam pump according to claim 1, characterized in that: the screw cap (2) is an integral all-plastic material component, and the screw cap (2) comprises a screw cap body (2) with an internal thread. 202), a spring pressure seat (206) is provided on the inner wall of the connection between the upper cavity (200) and the screw cap body (202), and the screw cap body (202) is internally provided with a press pump head movable cavity (203), the inner wall of the screw cover body (202) is provided with a pump body socket (204), and the lower opening of the screw cover body (202) is provided with a rotation stop structure (205).
A foam pump according to claim 1, characterized in that: the pressing pump head (1) comprises a spray head (101) and a pump head body (102), and the spray head (101) is provided with a bubble inside A cavity (103), the foaming cavity (103) is arranged obliquely, the outer cylinder (104) and the inner cylinder (105) are coaxially arranged on the pump head body (102), the The lower part of the inner cylinder (105) is provided with an anti-detachment structure (107), and the foaming component (4) is arranged inside the foaming cavity (103) and/or the inner cylinder (105); the inner A spring mounting ring seat (106) is provided at the connection between the cylinder body (105) and the pump head body (102).
A foam pump according to claim 1, characterized in that: the pump body (3) is connected with the screw cap (2) in a sealed plug-in connection, and the pump body (3) is an adjustable spray volume pump body ; The upper end of the described pump body (3) is provided with a plug-in connection structure (301), the side wall of the described pump body (3) is provided with an air outlet (302) that communicates with the liquid container, and the described pump body (1) A cylinder (31), a hydraulic cylinder (32) and an upper fluid valve seat (33) are integrally provided inside.
A foam pump according to claim 1, characterized in that: the piston assembly (5) comprises a piston rod assembly (51) with a liquid channel (52), a compressed air piston with an air intake and upper air structure an assembly (55) and a hydraulic piston (56); the upper end of the piston rod assembly (51) is movably connected with the pneumatic piston assembly (55), and the upper end of the piston rod assembly (51) is connected with the pneumatic piston A gas-liquid confluence channel (7) is formed between the components (55), and the lower end of the piston rod component (51) is movably connected with the hydraulic piston (56) in an open-close manner.
A foam pump according to claim 7, characterized in that: the piston rod assembly (51) comprises a piston rod body (511) and a thimble (512) movably arranged inside the piston rod body (511); The liquid channel (52) is formed between the thimble (512) and the inner wall of the piston rod body (511).
The foam pump according to claim 8, characterized in that: the piston rod body (511) has an integrated structure, and the piston rod body (511) is provided with a cavity (513) penetrating the upper and lower sides. The upper end of the piston rod body (511) is provided with an inclined liquid outlet valve cavity (514) that cooperates with the thimble (512) to realize opening and closing, and the upper ring of the upper outer wall of the piston rod body (511) is provided with an upper The shrapnel seat (515) of the air port (9).
The foam pump according to claim 8, characterized in that: the ejector pin (512) has an integral structure, the upper end of the ejector pin (512) is provided with an inclined sealing valve body structure (517), and the The lower end of the thimble (512) is provided with a two-way sealing valve body structure (518); an upper liquid channel (10) is formed between the two-way sealing valve body structure (518) and the hydraulic piston (56). (512) Move up and down along the piston rod body (511) to realize the on-off of the lower liquid channel (10) and the on-off of the upper liquid channel (52) and the gas-liquid confluence channel (7).
A foam pump according to claim 7, characterized in that: the air-pressing piston assembly (55) comprises a air-pressing piston (551) and a gas valve plate (552), and the gas valve plate (552) is inserted into Inside the compression piston (551) and cooperating with the piston rod assembly (51) to achieve air intake and air intake.
The foam pump according to claim 11, characterized in that: the compressed air piston (551) is an integral all-plastic component, and the compressed air piston (551) comprises a connecting seat (553) and a piston body (554) ); the outer wall of the connecting seat (553) is provided with an anti-separation protrusion (550), the connecting seat (553) is sealed with the inner seal of the pressing pump head (1), and the connecting seat (553) ) is sequentially provided with a foam assembly mounting seat (555), a gas-liquid mixing chamber (556) and an upper air chamber (557) from top to bottom; the piston body (554) is arranged on a coaxial line with the connecting seat There is a valve plate mounting seat (558), and an air inlet groove (559) is provided at the connection between the valve plate mounting seat (558) and the piston body (554).
The foam pump according to claim 11, characterized in that: the gas valve plate (552) is an integral all-plastic material member, and the gas valve plate (552) comprises a valve plate body (5520), Inner valve plate (5521) and outer valve plate (5522).
The foam pump according to claim 7, characterized in that: the hydraulic piston (56) is a one-piece all-plastic component, and the hydraulic piston (56) comprises an outer piston body (561) and an inner A valve seat (562), the outer piston body (561) is connected with the inner wall of the hydraulic cylinder (32) in a movable seal up and down, and a piston assembly is arranged between the inner valve seat (562) and the outer piston body (561) Mating cavity (563).
The foam pump according to any one of claims 1 to 14, wherein the foaming component (4) comprises an initial foaming component (41) or/and a foaming foaming component (42), The initial foaming component (41) is arranged at the connecting end of the pressing pump head (1) and the pump body (3), and the foaming foaming component (42) is detachably arranged on the pressing pump head (1). Bubble outlet.
A foam pump according to claim 15, characterized in that: the initial foaming component (41) comprises a foaming body (411) and a double-layer foaming net (412), and the foaming body (412) 411) A foaming cavity (413) is provided inside, the upper and lower ends of the foaming cavity (413) are respectively provided with installation grooves (414), and the double-layer foaming (412) mesh is arranged in the installation groove (411). 414) inside; the foamed body (411) and the double-layer foamed net (412) are respectively one-piece all-plastic material components, and the double-layered foamed net (412) includes a coarse net and a fine net; Said foaming hair assembly (42) includes a foaming foam body (421) and a fine foaming net (422).
A foam pump according to any one of claims 1 to 14, characterized in that: the valve member (6) is an integral all-plastic air valve, and the valve member (6) is provided with a flat position The upper liquid port (61); the valve member (6) is arranged inside the pump body (3) for opening and closing the liquid passage between the liquid container and the pump body (3).