Foam pump with replaceable foaming core

Abstract

The invention discloses a foam pump with a replaceable foaming core, and belongs to the technical field of cleaning appliances, the foam pump comprises a mounting seat, a driving swing part is arranged at the bottom of the mounting seat, a gas-liquid pumping-out part is arranged at the top of the mounting seat, the gas-liquid pumping-out part is connected with the driving swing part, a gas-liquid discharging part is arranged at the top of the gas-liquid pumping-out part, and the gas-liquid discharging part is connected with the driving swing part. A top shell is arranged at the top of the gas-liquid discharging part, a detachable foaming core is arranged on the gas-liquid discharging part, and a liquid inlet nozzle and a gas inlet nozzle are respectively arranged on the top shell. Through the clamping type detachable design of the foaming core and the foaming nozzle, the pain point that a traditional foaming core is integrally formed and cannot be cleaned and replaced is thoroughly solved, a user can regularly detach the foaming core to remove residual impurities, the problem of uneven foaming caused by micropore blockage is avoided, meanwhile, bacterium and mould breeding in a humid environment is completely eradicated, and the service life of the foaming nozzle is prolonged. And the use sanitation and safety are greatly improved.

Description

Technical Field

[0001] This invention belongs to the field of cleaning equipment technology, and in particular relates to a foam pump with a replaceable foam core. Background Technology

[0002] With the continuous improvement of living standards and the growing awareness of health and hygiene, automatic hand sanitizer dispensers have become common cleaning tools in modern homes, offices, and public restrooms due to their convenient dispensing and ability to avoid cross-contamination. Among them, foam-type hand sanitizer dispensers are particularly popular due to their fine foaming and economical usage. The foaming core, as the core functional component of the foam pump, works by using its internal porous structure to thoroughly mix the hand sanitizer with air, thereby forming a dense and uniform foam.

[0003] However, most mainstream foam pumps on the market have design flaws. Their foaming cores are often rigidly connected to the pump body using a one-piece injection molding process, lacking independent disassembly capabilities. Over long-term use, hand sanitizer residue, environmental dust, and impurities easily clog the micropores of the foaming core, leading not only to a sharp decrease in foam output and uneven, coarse foam texture, severely impacting the user experience, but also fostering the growth of bacteria, mold, and other microorganisms in the damp, enclosed space, posing a potential threat to user health. More importantly, because the foaming core cannot be disassembled for cleaning or replacement, even if other pump components are intact, users must replace the entire hand sanitizer dispenser, significantly increasing operating costs and resulting in unnecessary waste of resources. Summary of the Invention

[0004] This invention provides a foam pump with a replaceable foam core to solve the problems in the prior art. The invention adopts the following technical solution: a foam pump with a replaceable foam core, including a mounting base, a driving swing section at the bottom of the mounting base, a gas-liquid pump outlet section at the top of the mounting base connected to the driving swing section, a gas-liquid discharge section at the top of the gas-liquid pump outlet section, a top shell at the top of the gas-liquid discharge section, a detachable foam core on the gas-liquid discharge section, and a liquid inlet and an air inlet on the top shell.

[0005] Furthermore, the driving swing unit includes a drive motor, an eccentric seat, a swing rod, and a swing frame. The drive motor is mounted on the top of the mounting base. The eccentric seat is connected to the output shaft of the drive motor. A steel ball is disposed inside the eccentric seat. The bottom of the swing rod is inclinedly disposed inside the eccentric seat and abuts against the steel ball. The swing frame is disposed on the top of the swing rod and has a placement hole.

[0006] Furthermore, the gas-liquid pumping section includes a mounting disc, a connecting diaphragm, a pumping liquid cup, and two pumping air cups. The mounting disc is disposed on the top of the mounting base. The connecting diaphragm is snapped between the mounting disc and the gas-liquid discharge section. The pumping liquid cup and the two pumping air cups are connected to the connecting diaphragm and snapped into three placement holes.

[0007] Furthermore, the umbrella-shaped valve includes a sealing disc, a sliding rod, and a limiting head. The sealing disc and the limiting head are respectively connected to the bottom and top of the sliding rod. The sliding rod slides up and down in the sliding hole, causing the sealing disc to close and open the liquid inlet.

[0008] Furthermore, the gas-liquid discharge section includes a discharge plate and an integrally formed foam nozzle. The discharge plate is located on top of the mounting disc. The discharge plate is divided into an air inlet chamber and a liquid inlet chamber. The air inlet chamber corresponds to the air inlet nozzle, and the liquid inlet chamber corresponds to the liquid inlet nozzle. The two sides of the discharge plate are respectively provided with air outlet chambers that communicate with the foam nozzle, and the discharge plate is provided with liquid outlet chambers that communicate with the foam nozzle.

[0009] Furthermore, the air inlet chamber is provided with a first air inlet and a second air inlet, the two air outlet chambers are respectively provided with a first exhaust port and a second exhaust port, the liquid inlet chamber is provided with a liquid inlet port, and the liquid outlet chamber is provided with a liquid outlet port.

[0010] Furthermore, each of the air inlet chamber, liquid inlet chamber, air outlet chamber, and liquid outlet chamber is provided with a sliding hole 500, and each sliding hole 500 is provided with a slidingly fitted umbrella-shaped valve. The umbrella-shaped valves on the air inlet chamber and liquid inlet chamber are located at the bottom, and the air outlet chamber and liquid outlet chamber on the air outlet chamber and liquid outlet chamber are located at the top. The umbrella-shaped valves respectively close and open the first air inlet hole, the second air inlet hole, the first exhaust hole, the second exhaust hole, the liquid inlet hole, and the liquid outlet hole.

[0011] Furthermore, the umbrella-shaped valve includes a sealing disc, a sliding rod, and a limiting head. The sealing disc and the limiting head are respectively connected to the bottom and top of the sliding rod, and the sliding rod is slidably connected within the sliding hole.

[0012] Furthermore, the top shell is installed on the top of the discharge plate, and the top shell is provided with an installation cylinder that connects with the foam nozzle. The installation cylinder is provided with a rotating head, and the rotating head is provided with a rotating ear. The installation cylinder is provided with a slot for engaging the rotating ear. The top of the rotating head is provided with a handle, and the middle position of the rotating head is provided with a first sealing ring for engaging. The inside of the rotating head is provided with a mixing chamber that communicates with the liquid outlet chamber. The inlet of the mixing chamber is provided with an intercepting foaming net. The outer wall of the rotating head is provided with an inlet that communicates with two corresponding air outlet chambers. The inlet is connected to the mixing chamber, and the inlet and the inlet of the mixing chamber are staggered vertically.

[0013] Furthermore, the foaming core includes a foaming cylinder located at the bottom of the mixing chamber, with an upper foaming net and a lower foaming net respectively provided at the top and bottom of the foaming cylinder, and a second sealing ring provided on the foaming cylinder for engaging with the foam nozzle.

[0014] Furthermore, the foam nozzle is provided with a step for placing the foaming cylinder, the bottom of the foaming cylinder is located on the step, and the upper foaming net at the top of the foaming cylinder is connected to the outlet of the mixing chamber.

[0015] The above-described at least one technical solution adopted in the embodiments of the present invention can achieve the following beneficial effects: Firstly, when the foam core needs cleaning or replacement, the present invention allows the rotating handle to disengage the rotating ear from the slot, and the rotating head to remove the foam core from the foam nozzle. After replacement, the rotating ear is aligned with the slot, pressed, and rotated to secure it. Through the snap-fit ​​detachable design of the foam core and the foam nozzle, the pain point of traditional foam cores being integrally molded and unable to be cleaned or replaced is completely solved. Users can periodically disassemble the foam core to remove residual impurities, avoiding uneven foaming caused by micropore blockage, while also preventing the growth of bacteria and mold in humid environments, greatly improving the hygiene and safety of use.

[0016] Secondly, the foaming core in this invention adopts a double-layer foaming structure of upper foaming net + lower foaming net, combined with the intercepting foaming net in the mixing chamber, to achieve "three-stage foaming". Compared with the traditional single-layer foaming structure, the foam is finer and fluffier, resulting in a better user experience. Combined with the synergistic structure of the dual-pump air cup bladder and umbrella nail valve, it ensures accurate and stable gas-liquid ratio, outputs dense and uniform foam, and significantly optimizes the user experience. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this invention, illustrate exemplary embodiments of the invention and are used to explain the invention, but do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural exploded view of the present invention; Figure 3 This is a cross-sectional view of the present invention; Figure 4 This is a three-dimensional structural diagram of the driving swing unit in this invention; Figure 5 This is a partial three-dimensional structural diagram of the driving swing section in this invention; Figure 6 This is a schematic diagram of the three-dimensional structure of the gas-liquid discharge section in this invention. Figure 1 ; Figure 7This is a schematic diagram of the three-dimensional structure of the gas-liquid discharge section in this invention. Figure 2 ; Figure 8 This is a three-dimensional structural diagram of the discharge tray in this invention; Figure 9 This is a three-dimensional structural diagram of the top shell in this invention; Figure 10 This is a three-dimensional structural diagram of the rotating head in this invention. Figure 1 ; Figure 11 This is a three-dimensional structural diagram of the rotating head in this invention. Figure 2 ; Figure 12 This is a cross-sectional view of the rotating head in this invention; Figure 13 This is a three-dimensional structural diagram of the foam core in this invention; Figure 14 This is a three-dimensional structural diagram of the umbrella-shaped valve in this invention; Figure label: Mounting base 1; Drive swing unit 2, drive motor 20, eccentric seat 21, swing rod 22, swing frame 23, steel ball 24, placement hole 25; The gas-liquid pump outlet 3 has a mounting disc 30, a connecting diaphragm 31, a pump liquid cup 32, and a pump gas cup 33. Gas-liquid discharge section 4, discharge plate 40, foam nozzle 41, air inlet chamber 400, liquid inlet chamber 401, air outlet chamber 402, liquid outlet chamber 403, first air inlet 404, second air inlet 405, first exhaust port 406, second exhaust port 407, liquid inlet 408, liquid outlet 409. Top shell 5, liquid inlet 50, air inlet 51, mounting cylinder 53, rotating head 54, annular groove 540, inlet 541, rotating ear 55, slot 56, handle 57, first sealing ring 58, mixing chamber 59, intercepting foaming net 590, step 410, sliding hole 500. Foam core 6, foam cylinder 60, upper foam net 61, lower foam net 62, second sealing ring 63; Umbrella-shaped valve 8, sealing disc 81, sliding rod 82, limit head 83. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0019] The following detailed description, in conjunction with the accompanying drawings, illustrates the technical solution of a foam pump with a replaceable foam core provided by various embodiments of the present invention.

[0020] Reference Figures 1 to 14 As shown, this embodiment of the invention provides a foam pump with a replaceable foam core, including a mounting base 1. The bottom of the mounting base 1 is provided with a driving swing part 2, and the top of the mounting base 1 is provided with a gas-liquid pump outlet part 3. The gas-liquid pump outlet part 3 is connected to the driving swing part 2. The top of the gas-liquid pump outlet part 3 is provided with a gas-liquid discharge part 4. The top of the gas-liquid discharge part 4 is provided with a top shell 5. The gas-liquid discharge part 4 is provided with a detachable foam core 6. The top shell 5 is provided with a liquid inlet 50 and an air inlet 51 respectively.

[0021] Furthermore, the driving swing unit 2 includes a drive motor 20, an eccentric seat 21, a swing rod 22, and a swing frame 23. The drive motor 20 is mounted on the top of the mounting base 1. The eccentric seat 21 is connected to the output shaft of the drive motor 20. A steel ball 24 is provided inside the eccentric seat 21. The bottom of the swing rod 22 is inclinedly disposed inside the eccentric seat 21 and abuts against the steel ball 24. The swing frame 23 is disposed on the top of the swing rod 22 and has a placement hole 25.

[0022] The three placement holes 25 on the swing frame 23 are precisely matched to the layout of one pump liquid cup 32 and two pump air cup 33. The design of the double pump air cup 33 can simultaneously achieve double the air extraction volume, providing sufficient air source for subsequent gas-liquid mixing, and ensuring the fluffiness and uniformity of the foam.

[0023] Furthermore, the gas-liquid pumping section 3 includes a mounting disc 30, a connecting diaphragm 31, a pumping liquid cup 32, and two pumping air cups 33. The mounting disc 30 is disposed on the top of the mounting base 1. The connecting diaphragm 31 is snapped between the mounting disc 30 and the gas-liquid discharge section 4. The pumping liquid cup 32 and the two pumping air cups 33 are connected to the connecting diaphragm 31. The pumping liquid cup 32 and the two pumping air cups 33 are snapped into the three placement holes 25.

[0024] The pump liquid cup 32 and pump air cup 33 are set independently to realize the gas-liquid separation delivery, avoid the air and hand sanitizer mixing in advance during delivery, effectively prevent pipeline blockage, and ensure the stability of gas-liquid delivery.

[0025] In this embodiment: When the drive motor 20 is powered on, it drives the eccentric seat 21 to rotate in a circular motion. The eccentric structure of the eccentric seat 21 pushes the steel ball 24 to produce radial displacement, which in turn drives the tilted swing rod 22 to perform reciprocating up-and-down swinging motion. The swinging motion of the swing rod 22 is transmitted to the swing frame 23, which drives the swing frame 23 to reciprocate synchronously, thereby forming a periodic compression and release of the pump liquid cup 32 and the two pump air cups 33 in the placement hole 25.

[0026] The swing frame 23 reciprocates, alternately squeezing and releasing the three cups: when the swing frame 23 moves upward, the cups are in a released state, the internal volume expands, and negative pressure is generated. At this time, the liquid pump cup 32 draws hand sanitizer through the liquid inlet channel, and the two air pump cups 33 simultaneously draw in outside air; when the swing frame 23 moves downward, the cups are in a compressed state, the internal volume shrinks, and the pressure increases. At this time, the liquid pump cup 32 pushes the hand sanitizer inside to the liquid inlet chamber of the gas-liquid discharge section, and the two air pump cups 33 push the air inside to the air inlet chamber 400 of the gas-liquid discharge section. Through this alternating action, the quantitative extraction and compartmentalized delivery of hand sanitizer and air are achieved, providing sufficient and uniform gas-liquid raw materials for subsequent gas-liquid mixing and foaming, ensuring the foam formation effect.

[0027] Specifically, each of the air inlet chamber 400, liquid inlet chamber 401, air outlet chamber 402, and liquid outlet chamber 403 is provided with a sliding hole 500. Each sliding hole 500 is provided with a slidingly fitted umbrella-shaped valve 8. The umbrella-shaped valves 8 on the air inlet chamber 400 and liquid inlet chamber 401 are located at the bottom, and the air outlet chamber 402 and liquid outlet chamber 403 are located at the top. The umbrella-shaped valves 8 respectively close and open the first air inlet 404, the second air inlet 405, the first exhaust port 406, the second exhaust port 407, the liquid inlet 408, and the liquid outlet 409.

[0028] Specifically, the umbrella nail valve 8 includes a sealing disc 81, a sliding rod 82, and a limiting head 83. The sealing disc 81 and the limiting head 83 are respectively connected to the bottom and top of the sliding rod 82, and the sliding rod 82 is slidably connected in the sliding hole 500.

[0029] During operation, the opening and closing state of the umbrella nail valve 8 is completely controlled by the pressure change in the corresponding chamber or cup, without the need for additional driving components: when the corresponding chamber or cup is in the release state and a negative pressure is generated inside, the negative pressure will drive the sliding rod 82 to slide upward, and the sliding rod 82 will simultaneously drive the bottom sealing plate 81 to move upward, so that the sealing plate 81 is disengaged from the corresponding hole, the hole is opened, and gas and liquid are allowed to flow in or out according to the preset path; When the corresponding chamber or cup is in a compressed state, the internal pressure increases, which pushes the sliding rod 82 to slide downward. The sliding rod 82 drives the sealing plate 81 to move downward, so that the sealing plate 81 fits tightly against the corresponding hole, completely sealing the hole and effectively preventing gas-liquid backflow, ensuring that gas and liquid are transported in a unidirectional path of "gas inlet - exhaust, liquid inlet - liquid outlet".

[0030] The limiting head 83 is always in contact with the top of the sliding hole 500, limiting the maximum sliding stroke of the sliding rod 82, preventing the sliding rod 81 from falling out of the sliding hole 500, ensuring the stable operation of the umbrella nail valve. At the same time, the umbrella nail valves 8 in each chamber work independently, controlling the opening and closing of the corresponding holes respectively, so as to achieve the orderly gas-liquid transportation.

[0031] The umbrella-shaped valve 8 precisely prevents gas-liquid backflow from disrupting the delivery process, preventing air backflow from affecting air intake and hand sanitizer backflow from causing waste. It also prevents backflow of mixed gas and liquid, thus avoiding pipe blockage and ensuring uniform foam output for a better user experience. Each port has an independent umbrella-shaped valve for precise control, ensuring orderly air intake, liquid intake, air exhaust, and liquid drainage. This guarantees accurate gas-liquid delivery ratios and ensures excellent foaming results.

[0032] The sealing disc 81 fits precisely with the orifice, ensuring excellent sealing and effectively preventing gas and liquid leakage. This avoids problems such as insufficient gas and liquid volume and reduced foaming effect caused by leakage. The limit head 83 further enhances the stability of the components, preventing the sliding rod 82 from falling off and causing device malfunction, thus extending the service life of the umbrella nail valve 8. In addition, the umbrella nail valve 8 can be independently disassembled from the sliding hole 500, facilitating later cleaning, maintenance, and replacement. This adapts to long-term use requirements, further reducing the maintenance cost of the device and improving its practicality. During use, the umbrella nail valve acts as a backflow preventer for liquids or gases.

[0033] Furthermore, the gas-liquid discharge section 4 includes a discharge plate 40 and an integrally formed foam nozzle 41. The discharge plate 40 is located at the top of the mounting disc 30. The discharge plate 40 is divided into an air inlet chamber 400 and a liquid inlet chamber 401. The air inlet chamber 400 corresponds to the air inlet nozzle 51, and the liquid inlet chamber 401 corresponds to the liquid inlet nozzle 50. The two sides of the discharge plate 40 are respectively provided with air outlet chambers 402 that communicate with the foam nozzle 41, and the discharge plate 40 is provided with liquid outlet chambers 403 that communicate with the foam nozzle 41.

[0034] Furthermore, the air inlet chamber 400 is provided with a first air inlet hole 404 and a second air inlet hole 405, the two air outlet chambers 402 are respectively provided with a first exhaust hole 406 and a second exhaust hole 407, the liquid inlet chamber 401 is provided with a liquid inlet hole 408, and the liquid outlet chamber 403 is provided with a liquid outlet hole 409.

[0035] Furthermore, the top shell 5 is installed on the top of the discharge plate 40. The top shell 5 is provided with an installation cylinder 53 that connects to the foam nozzle 41. The installation cylinder 53 is provided with a rotating head 54. The rotating head 54 is provided with a rotating ear 55. The installation cylinder 53 is provided with a slot 56 for engaging the rotating ear 55. The top of the rotating head 54 is provided with a handle 57. The middle position of the rotating head 54 is provided with a first sealing ring 58 for engaging. The inside of the rotating head 54 is provided with a mixing chamber 59 that communicates with the liquid outlet chamber 403. The inlet of the mixing chamber 59 is provided with an intercepting foaming net 590. The outer wall of the rotating head 54 is provided with an inlet 541 that communicates with the two air outlet chambers 402. The inlet 54 is connected to the mixing chamber 59. The inlet 541 and the inlet of the mixing chamber 59 are staggered vertically.

[0036] First, the gas-liquid mixing and foaming effects are optimized to avoid turbulence and backflow caused by direct gas-liquid flow, extending the premixing stroke. This, combined with a 590 interceptor foaming net, ensures uniform premixing, and with subsequent double-layer foaming nets, guarantees dense, fine, uniform, and stable foam. Second, the stability of valves and pipelines is improved, effectively reducing the probability of hand sanitizer backflow into the air intake channel and preventing the pump cup and air intake valve from sticking and clogging. Simultaneously, fluid pressure peaks are dispersed, reducing impact wear on seals, the inner wall of the cavity, and the foaming net, extending component lifespan. Third, the structural layout is optimized, fully utilizing the internal space of the rotating head to facilitate product miniaturization, and ensuring that the sealing areas of the two channels are independent, reducing sealing stress interference and lowering the risk of leakage. Finally, cleaning and maintenance are facilitated, reducing the accumulation of liquid and impurities at the air inlet, lowering the probability of clogging, and ensuring long-term stable operation of the device.

[0037] Furthermore, the foaming core 6 includes a foaming cylinder 60 located at the bottom of the mixing chamber 59. The top and bottom of the foaming cylinder 60 are respectively provided with an upper foaming net 61 and a lower foaming net 62. The foaming cylinder 60 is provided with a second sealing ring 63 for engaging with the foam nozzle 41.

[0038] Specifically, the foam nozzle 41 is provided with a step 410 for placing the foaming cylinder 60, the bottom of the foaming cylinder 60 is located on the step 410, and the upper foaming net 61 at the top of the foaming cylinder 60 is connected to the outlet of the mixing chamber 59.

[0039] The first sealing ring 58 and the second sealing ring 63 improve the sealing between the rotating head 54 and the mounting cylinder 53, and between the foaming core 6 and the foam nozzle 41, preventing gas and liquid leakage and ensuring the stability of the foaming effect.

[0040] The dispensing tray 40 has two air outlet chambers 402 symmetrically arranged on both sides. Both air outlet chambers 402 are connected to the foam nozzle 41 through internal channels for conveying air. The dispensing tray 40 also has an independent liquid outlet chamber 403, which is connected to the foam nozzle 41 through a dedicated channel for conveying hand sanitizer.

[0041] The foam nozzle 41 has a stepped structure inside for engaging the foaming core 6, achieving precise alignment between the gas and liquid components and ensuring that all gas and liquid flow into the foaming core. During operation, the air supplied by the gas-liquid pump 3 enters the air intake chamber 400 through the first air inlet 404 and the second air inlet 405, and is then delivered to the foam nozzle 41 through the first exhaust 406 and the second exhaust 407 of the two air outlet chambers 402. The hand sanitizer supplied by the gas-liquid pump 3 enters the liquid inlet chamber 401 through the liquid inlet 408, and is then delivered to the foam nozzle 41 through the liquid outlet 403. After the air and hand sanitizer merge inside the foam nozzle 41, they flow synchronously into the foaming core 6 engaged with the foam nozzle 41, preparing for subsequent foaming.

[0042] In this embodiment: The gas-liquid mixing foaming process adopts a layered and progressive design to ensure fine and uniform foam. Specifically, the air delivered to the gas-liquid discharge section 3 through the gas discharge chambers 402 on both sides of the discharge plate 40 flows smoothly into the inlet 541 opened on the outer wall of the top shell rotating head 54, and simultaneously merges into the mixing chamber 59 inside the rotating head 54; At the same time, the hand sanitizer is precisely delivered through the liquid outlet chamber 403 of the gas-liquid outlet section. It first flows through the pre-set intercepting foaming net 590 in the mixing chamber 59. The fine mesh of the intercepting foaming net 590 cuts the hand sanitizer into small droplets, completing the initial foaming operation.

[0043] After the initial foaming of hand sanitizer droplets and the evenly flowing air, they are fully mixed and blended in the mixing chamber 59 to form a preliminary foam mixture. The foam mixture then continues to flow downwards, passing through the foaming core 6 that is snapped into the foam nozzle 41. It then passes through the lower foaming net 62 at the bottom and the upper foaming net 61 at the top of the foaming core 6. The mesh density of the double-layer foaming net is gradually refined, which performs a secondary fine cutting and extrusion of the foam mixture, further breaking down and refining larger foam particles, and finally forming a dense, delicate, fluffy and uniform foam, which is smoothly discharged from the outlet of the rotating head 54 to meet the user's cleaning needs.

[0044] The foam core 6 features a convenient and quick-release design for disassembly and assembly, requiring no tools throughout the process, greatly improving user convenience.

[0045] When the foam core 6 becomes clogged in micropores or accumulates hand sanitizer residue after long-term use, or when a new foam core 6 needs to be replaced, the user only needs to hold the handle 57 at the top of the rotating head 54 and gently turn the handle 57 clockwise or counterclockwise. The handle 57 will drive the rotating head 54 to rotate synchronously, so that the rotating ear 55 on the outer wall of the rotating head 54 gradually disengages from the corresponding slot 56 on the mounting cylinder 53. At this time, the rotating head 54 can be easily lifted upwards and completely removed from the mounting cylinder 53.

[0046] After the rotating head 54 is removed, the foam core 6 is fully exposed. Since the foam core 6 is secured inside the foam nozzle 41 by its own second sealing ring 63, the user only needs to gently pinch the top of the foam core 6 and exert upward force to remove it from the foam nozzle 41 for cleaning or replacement.

[0047] When replacing the new foam core 6, simply align the new foam core 6 with the slot of the foam nozzle 41, so that the bottom of the foam core 6 is on the step 410. Then gently press it until the bottom is locked. Next, align the rotating ear 55 of the rotating head 54 with the slot 56 of the mounting cylinder 53, press it in place, and then rotate the handle 57 in the opposite direction to make the rotating ear 55 lock into the slot 56 and fix it. This completes the entire disassembly and replacement process. The operation is simple and efficient and requires no professional skills.

[0048] The rotating ear 55 and the slot 56 in this design adopt a precise snap-fit ​​structure. The two are precisely matched in size, which not only ensures the stability of the rotating head 54 after installation and avoids loosening or falling off during use, but also enables quick assembly and disassembly. Compared with the traditional structure that requires tools such as screwdrivers and wrenches for disassembly, the ease of operation is greatly improved, making it suitable for all kinds of people, especially for non-professionals such as the elderly and women.

[0049] The foam core 6 adopts a double-layer superimposed structure design of upper foam net 61 and lower foam net 62. Both upper foam net 61 and lower foam net 62 are made of high-density fine mesh material, and the mesh directions of the two layers of foam nets are intersected. Together with the intercepting foam net 590 in the mixing chamber 59, a three-stage foaming process of "primary intercepting foaming + secondary fine foaming" is formed.

[0050] Compared to the single-layer foaming net structure used in traditional foam pumps, the three-stage foaming process can fully mix hand sanitizer with air, cutting the foam particles into smaller and more uniform particles. The output foam is dense and delicate, with a better feel. At the same time, it can reduce the amount of hand sanitizer used and improve the utilization rate of hand sanitizer, saving on usage costs and improving cleaning effect.

[0051] More importantly, the detachable design of the foam core 6 completely solves the core pain point of traditional foam pumps where the foam core is integrally molded and cannot be disassembled. In traditional foam pumps, the foam core 6 is rigidly connected to the pump body. After long-term use, hand sanitizer residue, environmental dust, and impurities easily clog the micropores of the foam core 6, leading to reduced foam output, coarse foam, or even no foam output. Furthermore, the damp, enclosed environment allows bacteria, mold, and other microorganisms to grow inside the clogged foam core, posing a threat to the user's hand hygiene and health. In this design, users can periodically disassemble the foam core 6, rinse it with water or soak it in detergent to remove internal residues and bacteria, or directly replace it with a new foam core 6. This eliminates the need to replace the entire foam pump, significantly reducing long-term operating costs, avoiding resource waste from old pumps (aligning with green environmental protection principles), and effectively ensuring hygiene and safety during use, preventing health hazards caused by bacterial growth.

[0052] The above description is merely an embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of the present invention should be included within the scope of the claims of the present invention.

Claims

1. A foam pump with a replaceable foam core, characterized in that, Includes a mounting base (1), the bottom of the mounting base (1) is provided with a driving swing part (2), the top of the mounting base (1) is provided with a gas-liquid pump outlet part (3), the gas-liquid pump outlet part (3) is connected to the driving swing part (2), the top of the gas-liquid pump outlet part (3) is provided with a gas-liquid discharge part (4), the top of the gas-liquid discharge part (4) is provided with a top shell (5), the gas-liquid discharge part (4) is provided with a detachable foaming core (6), and the top shell (5) is provided with a liquid inlet (50) and an air inlet (51).

2. A foam pump with a replaceable foam core according to claim 1, characterized in that: The driving swing unit (2) includes a drive motor (20), an eccentric seat (21), a swing rod (22), and a swing frame (23). The drive motor (20) is mounted on the top of the mounting base (1). The eccentric seat (21) is connected to the output shaft of the drive motor (20). A steel ball (24) is provided inside the eccentric seat (21). The bottom of the swing rod (22) is inclined inside the eccentric seat (21) and abuts against the steel ball (24). The swing frame (23) is located on the top of the swing rod (22). The swing frame (23) is provided with a placement hole (25).

3. A foam pump with a replaceable foam core according to claim 2, characterized in that: The gas-liquid pumping section (3) includes a mounting disc (30), a connecting diaphragm (31), a pumping liquid cup (32), and two pumping air cups (33). The mounting disc (30) is located on the top of the mounting base (1). The connecting diaphragm (31) is snapped between the mounting disc (30) and the gas-liquid discharge section (4). The pumping liquid cup (32) and the two pumping air cups (33) are connected to the connecting diaphragm (31). The pumping liquid cup (32) and the two pumping air cups (33) are snapped into three placement holes (25).

4. A foam pump with a replaceable foam core according to claim 3, characterized in that: The gas-liquid discharge section (4) includes a discharge plate (40) and an integrally formed foam nozzle (41). The discharge plate (40) is located on the top of the mounting disc (30). The discharge plate (40) is divided into an air inlet chamber (400) and a liquid inlet chamber (401). The air inlet chamber (400) corresponds to the air inlet nozzle (51), and the liquid inlet chamber (401) corresponds to the liquid inlet nozzle (50). The two sides of the discharge plate (40) are respectively provided with air outlet chambers (402) that communicate with the foam nozzle (41). The discharge plate (40) is provided with a liquid outlet chamber (403) that communicates with the foam nozzle (41).

5. A foam pump with a replaceable foam core according to claim 4, characterized in that: The air inlet chamber (400) is provided with a first air inlet hole (404) and a second air inlet hole (405), the two air outlet chambers (402) are respectively provided with a first exhaust hole (406) and a second exhaust hole (407), the liquid inlet chamber (401) is provided with a liquid inlet hole (408), and the liquid outlet chamber (403) is provided with a liquid outlet hole (409).

6. A foam pump with a replaceable foam core according to claim 5, characterized in that: Each of the air inlet chamber (400), liquid inlet chamber (401), air outlet chamber (402), and liquid outlet chamber (403) is provided with a sliding hole (500). Each of the sliding holes (500) is provided with a slidingly fitted umbrella-shaped valve (8). The umbrella-shaped valves (8) on the air inlet chamber (400) and liquid inlet chamber (401) are located at the bottom, and the air outlet chamber (402) and liquid outlet chamber (403) on the air outlet chamber (402) and liquid outlet chamber (403) are located at the top. Several of the umbrella-shaped valves (8) respectively close and open the first air inlet hole (404), the second air inlet hole (405), the first exhaust hole (406), the second exhaust hole (407), the liquid inlet hole (408), and the liquid outlet hole (409).

7. A foam pump with a replaceable foam core according to claim 6, characterized in that: The umbrella nail valve (8) includes a sealing disc (81), a sliding rod (82), and a limiting head (83). The sealing disc (81) and the limiting head (83) are respectively connected to the bottom and top of the sliding rod (82), and the sliding rod (82) is slidably connected in the sliding hole (500).

8. A foam pump with a replaceable foam core according to claim 4, characterized in that: The top shell (5) is installed on the top of the discharge plate (40). The top shell (5) is provided with a mounting cylinder (53) that connects with the foam nozzle (41). The mounting cylinder (53) is provided with a rotating head (54). The rotating head (54) is provided with a rotating ear (55). The mounting cylinder (53) is provided with a slot (56) for engaging the rotating ear (55). The top of the rotating head (54) is provided with a handle (57). The middle position of the rotating head (54) is provided with a slot for engaging the rotating ear (55). The first sealing ring (58) is provided inside the rotating head (54), which is connected to the liquid outlet chamber (403). The inlet of the mixing chamber (59) is provided with an intercepting foaming net (590). The outer wall of the rotating head (54) is provided with an inlet (541) that is connected to the two air outlet chambers (402). The inlet (541) is connected to the mixing chamber (59), and the inlet (541) and the inlet of the mixing chamber (59) are staggered vertically.

9. A foam pump with a replaceable foam core according to claim 8, characterized in that: The foam core (6) includes a foam cylinder (60) located at the bottom of the mixing chamber (59). The top and bottom of the foam cylinder (60) are respectively provided with an upper foaming net (61) and a lower foaming net (62). The foam cylinder (60) is provided with a second sealing ring (63) for snapping into the foam nozzle (41).

10. A foam pump with a replaceable foam core according to claim 9, characterized in that: The foam nozzle (41) has a step (410) for placing the foaming cylinder (60), the bottom of the foaming cylinder (60) is located on the step (410), and the upper foaming net (61) at the top of the foaming cylinder (60) is connected to the outlet of the mixing chamber (59).

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