Foam pump

Abstract

A foam pump, comprising an actuator head (2), an outer cover (3), a mesh member (4), a big piston (6), a diaphragm (7), a stem (8), an all-plastic spring (9), a piston (10), a sub-stem (11), a sealing member (12), a sealing portion (13) and a cylindrical housing (14). The sealing portion (13) divides the cylindrical housing (14) into an air chamber (X) and a liquid storage chamber (Y), and the all-plastic spring (9) is arranged inside the air chamber (X), with one end sleeved on the stem (8) and the other end disposed on the sealing portion (13). The foam pump can effectively reduce the risk of a liquid being contaminated, and can also facilitate the recycling of plastic products.

Description

Foam pump TECHNICAL FIELD

[0001] The present application relates to the technical field of foam pump nozzle, in particular to a foam pump. BACKGROUND

[0002] Foam pump is mainly used in daily chemical products. When using, foam pump mixes liquid and air in the bottle to form foam, which eliminates the step of manually rubbing to form foam and facilitates cleaning. The main working principle of foam pump is that by pressing action, pressure difference is formed in the bottle to drive the liquid in the bottle to move upward, the liquid in the bottle contacts with air to form foam, and the foam is sprayed from the nozzle.

[0003] At present, the spring in the commonly used foam pump is arranged in the liquid transmission channel, and the spring is made of metal. This kind of foam pump has the following defects: (1) other parts of the foam pump are made of plastic, and the spring is made of metal. When recycling, metal and plastic need to be separated, which is not conducive to the recycling of plastic products. (2) The metal spring arranged in the liquid transmission channel is easily oxidized and corroded by the liquid, which affects the service life of the metal spring, and on the other hand, the metal spring and the oxide of the metal spring are easy to contaminate the liquid in the bottle.

[0004] It should be noted that the above content is not necessarily prior art, and is not used to limit the patent protection scope of the present application.

[0005] SUMMARY

[0006] In view of the defects of the prior art, the purpose of the present application is to provide a foam pump. The foam pump comprises a press head, an outer cover, a screen piece, a large paddle, a blade, a main column, a full-plastic spring, a piston, a secondary column, a sealing piece, a sealing part and a small cylinder. The spring arranged in the embodiment of the present application is a full-plastic spring, which is convenient for recycling plastic products. The full-plastic spring is arranged in the air chamber and does not directly contact with the liquid in the liquid transmission channel of the foam pump, which can effectively reduce the risk of contamination of the liquid in the liquid transmission channel.

[0007] To achieve the above purpose, the technical scheme is as follows:

[0008] A foam pump comprises a press head, an outer cover, a screen piece, a large paddle, a blade, a main column, a full-plastic spring, a piston, a secondary column, a sealing piece, a sealing part and a small cylinder.

[0009] The press head is sleeved in the outer cover, and the outer cover is sleeved on the small cylinder. The screen piece is arranged in the press head, one end of the screen piece is connected with the press head, and the other end of the screen piece is connected with one end of the large paddle. The other end of the large paddle is movably connected in the small cylinder.

[0010] The other end of the big clap is provided with a vane and connected with one end of the main column; the other end of the main column is movably connected with the auxiliary column through a piston; the main column, the piston and the auxiliary column jointly form a liquid transmission channel;

[0011] The bottom of the small cylinder is provided with a sealing element; the small cylinder is provided with a sealing part, which is arranged above the sealing element and separates the small cylinder into a gas chamber and a liquid storage chamber which are not communicated with each other; the gas chamber is away from the sealing element relative to the liquid storage chamber;

[0012] The sealing part is provided with a channel for vertical reciprocating movement of the liquid transmission channel; when the liquid transmission channel moves to the lowest point, it can penetrate the sealing part and reach the liquid storage chamber;

[0013] The full-plastic spring is arranged in the gas chamber, one end of which is sleeved on the main column and the other end is arranged on the sealing part.

[0014] In some embodiments, a dust cover is further included, which is arranged on the pressing head and detachably connected with the pressing head.

[0015] In some embodiments, a straw is further included, which is arranged at the bottom of the small cylinder.

[0016] In some embodiments, the screen element is a tubular structure, one or more screens are arranged on the end or inside of the screen element; the screen is perpendicular to the screen element.

[0017] In some embodiments, the big clap includes a column part and a piston part; the column part is connected with the screen element, the piston part is provided with a through hole and an embedding part, and the vane is arranged in the piston part through the embedding part.

[0018] In some embodiments, the vane is a tubular structure, an outer vane is arranged on the outer side wall and an inner vane is arranged on the inner side wall.

[0019] In some embodiments, a first limiting part is arranged on the outer side wall of the main column and a second limiting part is arranged on the inner side wall; a first sealing position is arranged on the first limiting part.

[0020] In some embodiments, a second sealing position is arranged on the auxiliary column, and a third limiting part is further arranged on one end close to the second sealing position.

[0021] In some embodiments, the bottom of the liquid storage chamber of the small cylinder is provided with a through hole, the sealing element is arranged in the liquid storage chamber and seals the through hole; the sealing element is a plastic bead or a glass bead.

[0022] In some embodiments, the outer cover is provided with a gasket at the position where the outer cover is connected to the small cylinder.

[0023] In the technical solution of the present application, the press head is pressed down manually, the outer blade of the vane forms a seal with the large press chamber, the volume is reduced, the pressure is increased, the inner blade of the vane is opened with the main column, the gas flows to the screen element, the piston is opened with the auxiliary column, the sealing element is sealed with the small cylinder, the liquid in the small cylinder is pumped out through the auxiliary column, mixed with the gas in the screen element to form foam, and sprayed out of the pump head through the nozzle of the press head. When the press head is released, the press head is bounced up under the action of the full-plastic spring, the inner blade of the vane is sealed with the main column to prevent the liquid from flowing back to the gas chamber, and the outer blade of the vane is opened with the large press to supplement the gas in the gas chamber. At this time, the small cylinder and the piston form a vacuum, the piston is sealed with the auxiliary column, and the sealing element is opened with the small cylinder to suck the liquid in the bottle. At this time, there is a certain amount of liquid in the small cylinder, and when the press head is pressed again, the liquid stored in the small cylinder will be pushed out, mixed with the gas in the screen element to form foam, and sprayed out of the pump head through the nozzle of the press head. The spring provided in the embodiment of the present application is a full-plastic spring, which is convenient for recycling plastic products. The full-plastic spring is arranged in the gas chamber and does not directly contact the liquid in the liquid transmission channel, which can effectively reduce the risk of contamination of the liquid in the liquid transmission channel.

[0024] It should be noted that the metal spring in the commonly used foam pump is directly arranged in the liquid transmission channel. The reason for choosing a metal spring is that the metal spring has the advantages of small volume and large elasticity, so that the volume of the foam pump made is relatively small, and has the advantages of lightness, smallness, and convenience for transportation. Under this structure, directly replacing the metal spring with a plastic spring has many defects, because ordinary plastic springs have the characteristics of small elasticity and large volume. If the metal spring is directly replaced with a plastic spring, although it is beneficial to the recycling of plastic products, the volume of the plastic spring is relatively large, which requires increasing the volume of the liquid transmission channel, ultimately resulting in a relatively large volume of the foam pump, losing its advantages of lightness, smallness, and convenience for transportation. Moreover, increasing the volume of the liquid transmission channel means increasing the pipe diameter of the liquid transmission channel. The increase in the pipe diameter increases the pressure borne by the pipe, and the wall thickness of the liquid transmission channel needs to be increased to ensure the service life of the liquid transmission channel, which increases the production cost of the foam pump. The foam pump disclosed in the embodiment of the present application replaces the metal spring with a full-plastic spring. Since the full-plastic spring is arranged in the gas chamber, the foam pump still has the advantages of lightness, smallness, and convenience for transportation under this structure, and therefore the foam pump structure provided in the embodiment of the present application is reasonable and has strong practicability. BRIEF DESCRIPTION OF DRAWINGS

[0025] In the drawings, like reference numerals refer to like elements throughout the several views. The drawings are not necessarily to scale, the emphasis instead being placed upon illustrating the principles of the application. It should be understood that the drawings are merely schematic and that the application can be embodied in many different forms.

[0026] Fig. 1 is an exploded view of a foam pump according to an embodiment of the present application.

[0027] Fig. 2 is a cross-sectional view of a foam pump according to an embodiment of the present application.

[0028] Fig. 3 is a cross-sectional view of a screen member according to an embodiment of the present application.

[0029] Fig. 4 is a cross-sectional view of a large pad according to an embodiment of the present application.

[0030] Fig. 5 is a cross-sectional view of a blade according to an embodiment of the present application.

[0031] Fig. 6 is a cross-sectional view of a main post according to an embodiment of the present application.

[0032] Fig. 7 is a structural schematic view of a main post according to an embodiment of the present application.

[0033] Fig. 8 is a structural schematic view of a sub post according to an embodiment of the present application.

[0034] Fig. 9 is a cross-sectional view of a small cylinder according to an embodiment of the present application.

[0035] Fig. 10 is a structural schematic view of a dust cover according to an embodiment of the present application.

[0036] Fig. 11 is a cross-sectional view of a push button according to an embodiment of the present application.

[0037] Fig. 12 is a cross-sectional view of an outer cover according to an embodiment of the present application.

[0038] Fig. 13 is a structural schematic view of a full plastic spring according to an embodiment of the present application.

[0039] Fig. 14 is a cross-sectional view of a piston according to an embodiment of the present application.

[0040] Fig. 15 is an assembly view of an assembly 1 according to an embodiment of the present application.

[0041] Reference numerals in the drawings: 1, dust cover; 2, push button; 3, outer cover; 4, screen member; 5, gasket; 6, large pad; 7, blade; 8, main post; 9, full plastic spring; 10, piston; 11, sub post; 12, sealing member; 13, sealing portion; 14, small cylinder; 15, suction tube; 41, screen; 61, post portion; 62, piston portion; 621, fitting portion; 71, outer blade; 72, inner blade; 81, first limiting member; 82, second limiting member; 83, first sealing position; 111, second sealing position; 112, third limiting member; 141, through hole; X, air chamber; Y, liquid storage chamber. DETAILED DESCRIPTION

[0042] Embodiments of the present application are described in detail below with reference to the accompanying drawings. In the drawings, the size of layers, regions, elements and the relative sizes of the same can be exaggerated for clarity. The same or similar components are denoted by the same or similar reference numerals throughout the drawings. The embodiments described below are exemplary only, and are not intended to limit the present application. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0043] It should be understood that when an element or layer is referred to as being "on", "adjacent", "connected to" or "coupled to" another element or layer, it can be directly on, adjacent, connected or coupled to the other element or layer, or one intervening element or layer can exist. In contrast, when an element is referred to as being "directly on", "directly adjacent", "directly connected to" or "directly coupled to" another element or layer, then there are no intervening elements or layers present. It will be understood that, although the terms first, second, third, etc. can be used herein to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the present disclosure. Similarly, a second element, component, region, layer or section discussed below could be termed a first element, component, region, layer or section without departing from the teachings of the present disclosure.

[0044] In the present application, unless specifically defined otherwise and limited, the terms "mount", "connect", "connection", "fixed", and the like, should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically defined. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0045] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0046] This application provides a foam pump, including a pusher, outer cover, screen, large tap, blade, main column, all-plastic spring, piston, secondary column, seal, sealing part, and small cylinder. The all-plastic spring eliminates the need for metal-spring separation in foam pumps, making plastic product recycling more convenient. Furthermore, the all-plastic spring is located within the air chamber and does not directly contact the liquid in the foam pump's liquid transmission channel, effectively reducing the risk of contamination of the liquid in the transmission channel.

[0047] This application provides a foam pump, as shown in Figures 1 and 2, including a pusher head 2, an outer cover 3, a screen 4, a large beater 6, a blade 7, a main column 8, a full plastic spring 9, a piston 10, a secondary column 11, a seal 12, a sealing part 13, and a small cylinder 14.

[0048] The press head 2 is fitted inside the outer cover 3, and the outer cover 3 is fitted onto the small cylinder 14; the screen 4 is disposed inside the press head 2, with one end connected to the press head 2 and the other end connected to one end of the large beater 6; the other end of the large beater 6 is movably connected inside the small cylinder 14;

[0049] The other end of the large lever 6 is provided with a blade 7, which is connected to one end of the main column 8; the other end of the main column 8 is movably connected to the auxiliary column 11 through the piston 10; the main column 8, piston 10, and auxiliary column 11 together form a liquid transmission channel.

[0050] A sealing element 12 is provided inside the bottom of the small cylinder 14; a sealing part 13 is provided inside the small cylinder 14, and the sealing part 13 is located above the sealing element 12 to divide the small cylinder 14 into a gas chamber X and a liquid storage chamber Y that are not connected to each other; the gas chamber X is far away from the sealing element 12 relative to the liquid storage chamber Y.

[0051] The sealing part 13 is provided with a channel for vertical reciprocating movement of the liquid transmission channel, and when the liquid transmission channel moves to the lowest point, it can penetrate the sealing part 13 to reach the liquid storage chamber Y;

[0052] The all-plastic spring 9 is arranged in the air chamber X, one end of the all-plastic spring 9 is sleeved on the main column 8, and the other end of the all-plastic spring 9 is arranged on the sealing part 13.

[0053] In the embodiment of the application, the press head 2 is manually pressed downward, the outer blade 7 of the blade 7 is sealed with the large paddle 6 to form an air chamber, the volume is reduced, the pressure is increased, the inner blade 7 of the blade 7 is opened with the first sealing position 83 on the main column 8, the gas flows to the screen member 4, the second sealing position 111 on the auxiliary column 11 is opened, the sealing member 12 is sealed with the small cylinder 14, the liquid in the small cylinder 14 is pumped out through the auxiliary column 11, flows to the screen member 4 and mixes with the gas to form foam, and is sprayed out of the pump head through the nozzle of the press head 2. When the press head 2 is manually released, the press head 2 is bounced upward under the action of the all-plastic spring 9, the inner blade 7 of the blade 7 is sealed with the first sealing position 83 on the main column 8, and the liquid is prevented from flowing back to the air chamber X. At the same time, the outer blade 7 of the blade 7 is sealed with the large paddle 6, and the air chamber X is supplemented with gas. At this time, the small cylinder 14 and the piston 10 form a vacuum, the second sealing position 111 on the auxiliary column 11 is sealed, the sealing member 12 and the small cylinder 14 are sealed, and the liquid in the bottle is sucked in. At this time, there is a certain amount of liquid in the small cylinder 14, and when the press head 2 is pressed again, the liquid stored in the small cylinder 14 will be pushed out, mixed with the gas through the screen member 4 to form foam, and sprayed out of the pump head through the nozzle of the press head 2. The spring arranged in the embodiment of the application is the all-plastic spring 9, which is convenient for recycling plastic products. The all-plastic spring 9 is arranged in the air chamber X and does not directly contact the liquid in the foam pump bottle body, which can effectively reduce the risk of pollution of the liquid in the bottle body.

[0054] In the embodiment of the application, the press head 2 is manually pressed downward, the large paddle 6 moves downward along the inner side wall of the small cylinder 14, the press head 2 is released, and the large paddle 6 moves upward along the inner side wall of the small cylinder 14. When the large paddle 6 moves vertically and reciprocally in the small cylinder 14, the large paddle 6 is sealingly connected with the inner side wall of the small cylinder 14.

[0055] In the embodiment of the present application, the main column 8, the piston 10 and the auxiliary column 11 jointly constitute a liquid transmission channel; the piston 10 drives the auxiliary column 11 to complete reciprocating movement in the main column 8; one end of the piston 10 is sealingly connected with the inner side wall of the main column 8, and the other end is sealingly connected with the outer side wall of the auxiliary column 11; the specific connection mode of the main column 8, the piston 10 and the auxiliary column 11 is shown in FIG. 2. In addition, the specific connection mode of the main column 8, the piston 10 and the auxiliary column 11 can also be that one end of the piston 10 is sealingly connected with the outer side wall of the main column 8, and the other end is sealingly connected with the inner side wall of the auxiliary column 11; as long as the main column 8, the piston 10 and the auxiliary column 11 can be movably and sealingly connected. In addition, the structure of the piston 10 is shown in FIG. 14; one end of the piston 10 is connected with the main column 8, and the other end is connected with the auxiliary column 11; it should be noted that the structure of the piston 10 can be designed according to actual needs, as long as the main column 8, the piston 10 and the auxiliary column 11 can be movably and sealingly connected.

[0056] In the embodiment of the present application, the flow direction of the liquid in the liquid storage chamber Y is: sequentially flowing from the liquid storage chamber Y through the auxiliary column 11, the piston 10, the main column 8, the screen member 4, the pressing head 2, and then being sprayed out from the nozzle of the pressing head 2.

[0057] In the embodiment of the present application, the sealing part 13 mainly plays a role of separating the small cylinder 14 into the gas chamber X and the liquid storage chamber Y which are not communicated with each other; when the liquid transmission channel reciprocatingly moves on the sealing part 13, the gas chamber X and the liquid storage chamber Y are also in a state of not being communicated with each other. The specific structure of the sealing part 13 can be designed according to actual needs, as long as the gas chamber X and the liquid storage chamber Y are always in a state of not being communicated with each other.

[0058] In the embodiment of the present application, the sealing part 13 is provided with a limiting structure or a spring seat, of course, the sealing part 13 itself can also be a spring seat; the sealing part 13 only needs to ensure that the gas chamber X and the liquid storage chamber Y are always in a state of not being communicated with each other; under this structure, one end of the full plastic spring 9 is sleeved on the sealing part 13, and the other end of the full plastic spring 9 is sleeved on the main column 8; under the action of the full plastic spring 9, the components which need to reciprocatingly move can normally work.

[0059] In the embodiment of the present application, as shown in FIG. 11, the pressing head 2 has no difference from the structure of a common pressing head, can complete the pressing action, and is internally provided with a channel, which can ensure that the liquid in the bottle and / or the foam formed by the liquid in the bottle can be sprayed out from the nozzle.

[0060] In the embodiment of the present application, as shown in FIG. 12, one end of the outer cover 3 is connected with the pressing head 2, and the other end is covered on the outer side wall of the small cylinder 14, which plays a role of connection and sealing; specifically, the outer cover 3 is sealingly connected with the pressing head 2, and the outer cover 3 is also sealingly connected with the small cylinder 14; therefore, the structure of the outer cover 3 can be reasonably set according to the structure of the pressing head 2 and the structure of the small cylinder 14.

[0061] In the embodiment of the present application, the screen member 4 is used to mix the liquid passing through the screen member 4 with air to form foam, so the screen member 4 needs to be provided with mesh holes, and the liquid can generate foam when passing through the screen member 4. The structure of the screen member 4 can be reasonably set according to the fineness of the required foam.

[0062] In the embodiment of the present application, the large piston 6 and the blade 7 jointly constitute a switch for opening or closing the air chamber X. When the press head 2 is pressed downward, the pressure in the air chamber X is increased, and the gas in the air chamber X can form an air flow to the screen member 4, so that the liquid can generate foam when passing through the screen member 4 and be sprayed from the nozzle of the press head 2. When the press head 2 rebounds upward, the liquid can be prevented from flowing back to the air chamber X.

[0063] In the embodiment of the present application, the sealing member 12 is a spherical structure, and the material of the sealing member 12 can be selected according to actual needs.

[0064] In the embodiment of the present application, the structure of the small cylinder 14 can be designed according to actual needs, and subsequently only the sealing part 13 is needed to separate the small cylinder 14 into different air chambers X and liquid storage chambers Y. Considering the factors of saving materials and production costs, the volume of the side corresponding to the air chamber X can be designed to be as large as possible, so that a larger pressure difference can be output, and the volume of the side corresponding to the liquid storage chamber Y can be correspondingly reduced.

[0065] In the embodiment of the present application, the all-plastic spring 9 refers to a spring made of plastic. The metal spring is replaced by the all-plastic spring 9. As shown in FIG. 13, the all-plastic spring 9 has a larger volume than the metal spring under the same elastic force. However, since the all-plastic spring 9 in the embodiment of the present application is arranged in the air chamber X, the influence of the all-plastic spring 9 on the volume of the air chamber X can be ignored. In addition, the all-plastic spring 9 is not arranged in the liquid transmission channel, so it is not necessary to increase the diameter and wall thickness of the liquid transmission channel. Under such a structure, the foam pump still has the advantages of being light, small, and convenient to transport, and therefore the foam pump structure provided in the embodiment of the present application is more reasonable and has stronger practicality. It should be noted that the structure of the all-plastic spring 9 can also be designed according to actual needs.

[0066] In the optional embodiment, a dust cover 1 is further included, which is arranged on the press head 2 and detachably connected with the press head 2. The dust cover 1 covers the press head 2, so that dust and other pollutants can be prevented from entering the press head 2, and the use effect is good. One of the structures of the dust cover 1 is shown in FIG. 10. It should be noted that the structure of the dust cover 1 can also be another structure as long as it can cover the press head 2.

[0067] In optional embodiments, as shown in FIG. 1, a straw 15 is further included, which is arranged at the bottom of the small cylinder 14. The straw 15 serves to increase the length of the liquid transmission channel, facilitating the pumping of liquid at the bottom of the bottle, and providing better use effect.

[0068] In optional embodiments, as shown in FIG. 3, the screen member 4 is in a tubular structure, and one or more screens 41 are arranged at the end or inside of the screen member 4; the screens 41 are perpendicular to the screen member 4. For example, the number of screens 41 is 1, 2, 3, 4, 5; the mesh of the screens 41 is 100, 200, 500, 1000, 1500, 2000. Specifically, the screens 41 can be uniformly arranged along the length direction of the screen member 4; for example, when the number of screens 41 is 3, the screens 41 are arranged at the top end, the bottom end, and the middle position inside the screen member 4, respectively; the liquid passing through the screen member 4 flows through the screen 41 at the bottom end, the screen 41 at the middle position inside the screen member 4, and the screen 41 at the top end in sequence, and is finally sprayed from the nozzle of the press head 2. The screen member 4 is in a tubular structure, which facilitates the generation of more dense foam.

[0069] In optional embodiments, as shown in FIG. 4, the large paddle 6 includes a column portion 61 and a piston portion 62; the column portion 61 is connected to the screen member 4, and the piston portion 62 is provided with a through hole and a fitting portion 621, and the blade 7 is arranged in the piston portion 62 through the fitting portion 621. The piston portion 62 is arranged, and the large paddle 6 moves along the inner side wall of the small cylinder 14 more smoothly, and provides good use effect.

[0070] In optional embodiments, as shown in FIG. 5, the blade 7 is in a tubular structure, and the outer side wall is provided with an outer leaf 71, and the inner side wall is provided with an openable and closable inner leaf 72; one end of the inner leaf 72 is fixedly connected to the inner side wall of the blade 7, and the other end is open; the opening and closing of the inner leaf 72 are completed by pressing or loosening the inner leaf 72, so as to control the opening and closing of the inner leaf 72; the structure is simple, and the use effect is good. It should be noted that the blade 7 can also be another structure, as long as it can complete the sealing or opening under the condition of pressing or loosening.

[0071] In optional embodiments, as shown in FIGS. 6-7, the outer sidewall of the main column 8 is provided with a first limiting component 81, and the inner sidewall is provided with a second limiting component 82; the first limiting component 81 is provided with a first sealing position 83. The function of the first limiting component 81 is to limit the full plastic spring 9. Specifically, one end of the full plastic spring 9 is sleeved on the main column 8 and located above the first limiting component 81, and the other end of the full plastic spring 9 is arranged on the sealing part 13, so that the full plastic spring 9 can be prevented from sliding downward. The function of the second limiting component 82 is to limit the piston 10 and the secondary column 11 from continuing to move upward. It should be noted that the second limiting component 82 can also be arranged on the outer sidewall of the main column 8. Specifically, the second limiting component 82 can be arranged according to the connection relationship between the main column 8, the piston 10, and the secondary column 11, and the second limiting component 82 can limit the piston 10 and the secondary column 11 from continuing to move upward. As shown in FIG. 7, the first sealing position 83 is a sheet-shaped structure that can be opened and closed, and can complete the sealing or opening function under the pressing or loosening condition. The first sealing position 83 can also be other openable and closable structures, and the specific structure of the first sealing position 83 is not limited herein. The main column 8 has a simple structure and is easy to manufacture and assemble.

[0072] In optional embodiments, as shown in FIG. 8, the secondary column 11 is provided with a second sealing position 111, and one end close to the second sealing position 111 is further provided with a third limiting component 112. The second sealing position 111 is a through hole. When the secondary column 11 is pressed, the secondary column 11 extends into the liquid storage chamber Y, and the second sealing position 111 is opened. At this time, the liquid in the liquid storage chamber Y flows through the second sealing position 111 and into the secondary column 11, and then the secondary column 11 can continue to rise and finally spray out of the nozzle of the press head 2. The second sealing position 111 is a through hole, which has a simple structure and is easy to manufacture and assemble. In addition, the second sealing position 111 can also be other structures except for a through hole, such as an openable and closable sealing sheet, as long as it can complete the corresponding function as a through hole. In addition, the third limiting component 112 is used to sleeve the piston 10 between the secondary column 11 and the main column 8.

[0073] In optional embodiments, as shown in FIG. 9, the bottom of the liquid storage chamber Y of the small cylinder 14 is provided with a through hole 141, and the sealing member 12 is placed in the liquid storage chamber Y and seals the through hole 141; the sealing member 12 is a plastic or glass bead; to facilitate recycling of plastic products, the sealing member 12 can be an optional plastic bead. In addition, the small cylinder 14 is designed to have a large upper part and a small lower part, and the volume of the gas chamber X is relatively large. The small cylinder 14 is further provided with a support seat for facilitating installation of the sealing part 13. The structure of the support seat can be reasonably designed according to the structure of the sealing part 13 to facilitate installation of the sealing part 13 and to facilitate separation of the small cylinder 14 into the gas chamber X and the liquid storage chamber Y. The sealing member 12 is in the shape of a ball, has good sealing effect, and has a simple structure. It should be noted that the sealing member 12 can also be a component having another structure, as long as it can complete the sealing and opening operations like the ball-shaped sealing part.

[0074] In some embodiments, as shown in FIGS. 1 and 2, the outer cover 3 is provided with a gasket 5 at the connection position with the small cylinder 14; the gasket 5 has a ring structure, and the material of the gasket 5 is flexible plastic, so that the connection between the outer cover 3 and the small cylinder 14 is more secure. The material of the gasket 5 can also be selected from other flexible materials, and the flexible plastic is selected to facilitate recycling of plastic materials.

[0075] Specific embodiments

[0076] Embodiment 1

[0077] The embodiment provides a foam pump, as shown in FIGS. 1 and 2, which comprises a dust cover 1, a press head 2, an outer cover 3, a screen member 4, a gasket 5, a large paddle 6, a blade 7, a main column 8, a full-plastic spring 9, a piston 10, a secondary column 11, a sealing member 12, a sealing part 13, a small cylinder 14, and a suction pipe 15.

[0078] The dust cover 1 is arranged on the press head 2 and is threadedly connected with the press head 2; the press head 2 is sleeved in the outer cover 3, and the outer cover 3 is sleeved on the small cylinder 14; the outer cover 3 is provided with the gasket 5 at the connection position with the small cylinder 14; the gasket 5 has a ring structure, and the material of the gasket 5 is flexible plastic; the screen member 4 is arranged in the press head 2, one end of the screen member 4 is connected with the press head 2, and the other end of the screen member 4 is connected with one end of the large paddle 6; the other end of the large paddle 6 is movably connected in the small cylinder 14.

[0079] The other end of the large paddle 6 is provided with the blade 7 and is connected with one end of the main column 8; the other end of the main column 8 is movably connected with the secondary column 11 through the piston 10; the main column 8, the piston 10 and the secondary column 11 jointly form a liquid transmission channel; the piston 10 can complete reciprocating movement between the secondary column 11 and the main column 8.

[0080] The bottom of the small cylinder 14 is provided with a sealing piece 12; the small cylinder 14 is provided with a sealing part 13 above the sealing piece 12, which separates the small cylinder 14 into a gas chamber X and a liquid storage chamber Y which are not communicated with each other; the gas chamber X is away from the liquid storage chamber Y relative to the sealing piece 12;

[0081] The sealing part 13 is provided with a channel for vertical reciprocating movement of the liquid transmission channel; when the liquid transmission channel moves to the lowest point, it can penetrate the sealing part 13 to reach the liquid storage chamber Y;

[0082] The outer side wall of the main column 8 is provided with a first limiting part 81, and the inner side wall is provided with a second limiting part 82; the first limiting part 81 is provided with a first sealing position 83; the first sealing position 83 is a flake-shaped opening and closing part; the full plastic spring 9 is arranged in the gas chamber X, one end of which is sleeved on the main column 8 and located above the first limiting part 81; the other end is arranged on the sealing part 13; the straw 15 is arranged at the bottom of the small cylinder 14;

[0083] The screen piece 4 is a tubular structure, which is provided with three screens 41; the screens 41 are arranged at the top end, the bottom end and the middle position of the screen piece 4; the screens 41 are perpendicular to the screen piece 4;

[0084] The large paddle 6 includes a column part 61 and a piston part 62; the column part 61 is connected with the screen piece 4, the piston part 62 is provided with a through hole and a fitting part 621, and the blade 7 is arranged in the piston part 62 through the fitting part 621;

[0085] The blade 7 is a tubular structure, which is provided with an outer leaf 71 on the outer side wall and an openable and closable inner leaf 72 on the inner side wall; one end of the inner leaf 72 is fixedly connected with the inner side wall of the blade 7, and the other end is open; the opening and closing of the inner leaf 72 is completed by pressing or releasing the inner leaf 72, so as to control the opening and closing of the inner leaf 72;

[0086] The secondary column 11 is provided with a second sealing position 111, and one end close to the second sealing position 111 is further provided with a third limiting part 112; the second sealing position 111 is a through hole;

[0087] The bottom of the liquid storage chamber Y of the small cylinder 14 is provided with a through hole 141, the sealing piece 12 is arranged in the liquid storage chamber Y and seals the through hole 141; the sealing piece 12 is a plastic bead; the small cylinder 14 is further provided with a support seat for installing the sealing part 13.

[0088] In the embodiment of the present application, the assembly 1 is assembled according to the assembly diagram shown in FIG. 15. The assembly 1 is composed of the screen member 4, the large paddle 6, the blade 7, the main column 8, the all-plastic spring 9, the piston 10, the auxiliary column 11, the sealing part 13, the small cylinder 14, and the sealing member 12. The sealing member 12 is placed at the bottom end of the small cylinder 14. The assembly 1 is installed on the inner side wall of the upper part of the small cylinder 14 through the large paddle 6, so that the large paddle 6 can move up and down under the sealing assembly of the small cylinder 14. The piston 10 can also move up and down under the sealing assembly between the main column 8 and the auxiliary column 11. Then, the outer cover 3 is sealingly installed on the outer side wall of the top of the small cylinder 14, and the sealing installation is completed. Finally, the press head 2 is installed on the outer cover 3, and the sealing installation between the press head 2 and the outer cover 3 is completed. Here, only one assembly mode of the foam pump in the embodiment of the present application is given. Specifically, the assembly of the foam pump in the embodiment of the present application can also be assembled by other modes, and the foam pump can be normally used after successful assembly.

[0089] In the embodiment of the present application, the press head 2 is manually pressed downward, and the outer blade of the blade 7 seals the air chamber together with the large paddle 6. The volume is reduced, and the pressure is increased, so that the inner blade of the blade 7 opens the first sealing position 83 on the main column 8. The gas flows to the screen member 4, and the second sealing position 111 on the auxiliary column 11 is opened. The sealing member 12 seals the small cylinder 14, the liquid in the small cylinder 14 is pumped out through the auxiliary column 11, flows to the screen member 4, mixes with the gas to form foam, and is sprayed out of the pump head through the nozzle of the press head 2. When the press head 2 is released, the press head 2 rebounds upward under the action of the all-plastic spring 9. The inner blade of the blade 7 seals the first sealing position 83 on the main column 8, so as to prevent the liquid from flowing back to the air chamber X. At the same time, the outer blade of the blade 7 opens the sealing position of the large paddle 6, and the gas is supplemented to the air chamber X. At this time, the small cylinder 14 and the piston 10 form a vacuum, and when the piston 10 moves upward, the second sealing position 111 on the auxiliary column 11 is sealed, and the sealing member 12 opens the sealing position of the small cylinder 14 to suck the liquid in the bottle. At this time, there is a certain amount of liquid in the small cylinder 14. When the press head 2 is pressed again, the liquid stored in the small cylinder 14 will be pushed out, mixed with the gas through the screen member 4 to form foam, and sprayed out of the pump head through the nozzle of the press head 2. The spring provided in the embodiment of the present application is the all-plastic spring 9, which is convenient for recycling plastic products. The all-plastic spring 9 is arranged in the air chamber X and does not directly contact the liquid in the bottle body of the foam pump, which can effectively reduce the risk of pollution of the liquid in the bottle body.

[0090] In summary, the foam pump in the embodiment of the present application is provided with the all-plastic spring 9, which is convenient for recycling plastic products. The all-plastic spring 9 is arranged in the air chamber X and does not directly contact the liquid in the bottle body of the foam pump, which can effectively reduce the risk of pollution of the liquid in the bottle body.

[0091] It should be noted that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are merely intended to facilitate the description of the application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application. The orientation terms "inner" and "outer" refer to the inner and outer of the profile of each component itself. For example, if the device in the drawings is inverted, the device described as "above" or "above" other devices or structures will be positioned "below" or "below" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below" orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein are interpreted accordingly.

[0092] It should also be noted that the "one embodiment", "another embodiment", "embodiment" and the like mentioned in the present application refer to the specific features, structures or characteristics described in connection with the embodiment, which are included in at least one embodiment described generally in the present application. The same expression appearing in several places in the specification does not necessarily refer to the same embodiment. Further, when a specific feature, structure or characteristic is described in connection with any embodiment, it is claimed that the implementation of such feature, structure or characteristic in connection with other embodiments also falls within the scope of the present application.

[0093] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0094] It should also be noted that the above is only the preferred embodiment of the present application, and does not limit the patent protection scope of the present application, and any equivalent structure or equivalent process transformation using the contents of the present application specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A foam pump characterized by, It includes a head (2), an outer cover (3), a screen member (4), a large slap (6), a blade (7), a main column (8), a full plastic spring (9), a piston (10), a secondary column (11), a sealing member (12), a sealing part (13), a small cylinder (14); The head (2) is sleeved in the outer cover (3), and the outer cover (3) is sleeved on the small cylinder (14); the screen member (4) is arranged in the head (2), one end of the screen member (4) is connected with the head (2), and the other end of the screen member (4) is connected with one end of the large slap (6); the other end of the large slap (6) is movably connected in the small cylinder (14); The other end of the large slap (6) is provided with the blade (7) and is connected with one end of the main column (8); the other end of the main column (8) is movably connected with the secondary column (11) through the piston (10); the main column (8), the piston (10) and the secondary column (11) jointly form a liquid transmission channel. The bottom of the small cylinder (14) is provided with the sealing member (12); the small cylinder (14) is provided with the sealing part (13), the sealing part (13) is arranged above the sealing member (12), and the small cylinder (14) is divided into a gas chamber (X) and a liquid storage chamber (Y) which are not communicated with each other; the gas chamber (X) is away from the sealing member (12) relative to the liquid storage chamber (Y); The sealing part (13) is provided with a channel for vertical reciprocating movement of the liquid transmission channel, and when the liquid transmission channel moves to the lowest point, the liquid transmission channel can penetrate the sealing part (13) and reach the liquid storage chamber (Y); The full plastic spring (9) is arranged in the gas chamber (X), one end of the full plastic spring (9) is sleeved on the main column (8), and the other end of the full plastic spring (9) is arranged on the sealing part (13).

2. The foam pump of claim 1, wherein It also includes a dust cover (1), and the dust cover (1) is arranged on the head (2) and is detachably connected with the head (2).

3. The foam pump of claim 1, wherein, It also includes a straw (15), and the straw (15) is arranged at the bottom of the small cylinder (14).

4. The foam pump of claim 1, wherein The screen member (4) is a tubular structure, one or more screens (41) are arranged on the end or inside of the screen member (4); the screen (41) is perpendicular to the screen member (4).

5. The foam pump of claim 1 wherein, The large slap (6) includes a column part (61) and a piston part (62); the column part (61) is connected with the screen member (4), the piston part (62) is provided with a through hole and a fitting part (621), and the blade (7) is arranged in the piston part (62) through the fitting part (621).

6. The foam pump of claim 1, wherein The blade (7) is a tubular structure, an outer leaf (71) is arranged on the outer side wall, and an openable and closable inner leaf (72) is arranged on the inner side wall.

7. The foam pump of claim 1, wherein The outer side wall of the main column (8) is provided with a first limiting part (81), and the inner side wall is provided with a second limiting part (82); the first limiting part (81) is provided with a first sealing position (83).

8. The foam pump of claim 1, wherein The secondary column (11) is provided with a second sealing position (111), and one end close to the second sealing position (111) is further provided with a third limiting part (112).

9. The foam pump of claim 1, wherein, The bottom of the liquid storage chamber (Y) of the small cylinder (14) is provided with a through hole (141), the sealing member (12) is placed in the liquid storage chamber (Y) and seals the through hole (141); the sealing member (12) is a plastic bead or a glass bead.

10. The foam pump of claim 1, wherein The outer cover (3) is provided with a gasket (5) at the position connected with the small cylinder (14).

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