A bacteria-proof drop head with one-way flow and liquid dispenser thereof

Abstract

This invention relates to the field of liquid containers, specifically to a unidirectional antibacterial dripper and its liquid dispenser. The antibacterial dripper includes an inner nozzle consisting of a central seat and an elastic valve body movably fitted onto a guide post of the central seat, an outer nozzle fitted onto the inner nozzle, and a liquid flow channel formed by the central seat, the elastic valve body, and a liquid reservoir. This allows the liquid in the liquid reservoir to flow unidirectionally to complete the dripping, preventing liquid residue near the drain outlet of the outer nozzle from flowing back into the liquid flow channel and contaminating the liquid in the liquid reservoir. Simultaneously, the antibacterial dripper has a flange on the base of the central seat, and an air filter channel penetrating the base and used to guide air through the liquid reservoir. This ensures that the air filter channel and the liquid flow channel are independent and do not interfere with each other, avoiding difficulties in subsequent liquid drainage from the liquid reservoir, effectively reducing the amount of liquid residue in the liquid reservoir, and preventing the entry of air from disrupting the sterile environment of the liquid reservoir and causing bacterial contamination of the liquid.

Description

Technical Field

[0001] This invention relates to the field of pharmaceutical containers, and in particular to a unidirectional flow-guiding antibacterial dropper and its liquid dispenser. Background Technology

[0002] A liquid dispenser is a device used to dispense liquids from a container, widely used in medical, chemical, and food industries. A liquid dispenser typically includes a dispensing head and a liquid reservoir. The dispensing head connects to the liquid container and dispenses the liquid, while the liquid reservoir stores the liquid. A traditional liquid dispenser's dispensing head generally includes a nozzle and a liquid channel. The liquid channel delivers liquid from the container to the nozzle. The working principle of a traditional liquid dispenser is as follows: when the user presses the liquid reservoir, the liquid inside is squeezed out through the liquid channel to the nozzle, forming one or more drops. When the user releases the liquid reservoir, the pressure inside decreases, and air is drawn into the liquid reservoir through the liquid channel to replenish the space inside the reservoir and balance the internal and external pressures.

[0003] To address the aseptic challenge, current technology CN103180051A provides a metering pump that enables unidirectional liquid flow, preventing residual liquid exposed to the environment from flowing back into the dispenser and contaminating the liquid inside. However, the metering pump itself has a very complex structure and high production cost. Furthermore, because the metering pump controls the unidirectional flow of liquid in the liquid reservoir, air cannot be compensated within the reservoir, making subsequent drainage of the reservoir difficult and resulting in excessive residual liquid and waste.

[0004] Existing technology CN202111170692.0 also provides a liquid dispenser, particularly a droplet dispenser, which uses a sandwich design on the one-way valve nozzle to separate the ventilation channel and the liquid flow channel. The ventilation channel allows air to pass through a filter within it for sterilization and to replenish the dispenser after the previous liquid is discharged. This achieves pressure compensation within the liquid reservoir to solve subsequent drainage difficulties and prevents residual liquid exposed to the environment from flowing back into the dispenser and contaminating the liquid inside. However, because the sandwich design separates the ventilation channel and the liquid flow channel, the two are very close together. To avoid air or liquid leakage, the assembly of the filter and ventilation channel needs to be very precise. Therefore, the droplet dispenser assembled in this patent is costly, and in complex real-world environments, leaks or liquid or air leaks due to insecure assembly of the filter and ventilation channel often lead to deformation and contamination.

[0005] The inventors of this application also discovered through examination of the two types of sterile liquid dispensers described above that, after the user presses the liquid reservoir to complete the liquid dispensing, residual liquid often adheres to the nozzle, forming drips. These liquid residues, when exposed to air for extended periods, can crystallize or attract dust and other contaminants, promoting bacterial growth and affecting the quality and effectiveness of the liquid. Summary of the Invention

[0006] To overcome the technical difficulties of existing technologies, such as complex structure, high production difficulty, and the tendency of residual liquid to adhere to the nozzle and form drips, this application provides a unidirectional flow-guiding antibacterial dripper. The antibacterial dripper includes an inner nozzle consisting of a central seat fixedly connected to a liquid reservoir and an elastic valve body movably sleeved on a guide post of the central seat, an outer nozzle sleeved on the inner nozzle, and a liquid flow channel formed by the cooperation of the central seat, the elastic valve body, and the liquid reservoir. The feature is that a flange is provided on the base of the central seat, and an air filter channel is provided inside the flange that penetrates the base and is used to guide air through the liquid reservoir.

[0007] When the user squeezes the liquid reservoir, the liquid inside the reservoir is pressurized and enters the gap between the bottom of the elastic valve body and the center seat base, squeezing the elastic valve body to cause it to elastically deform and detach from the center seat, and move towards the external drip nozzle outlet. A liquid flow channel is formed between the center seat and the elastic valve body, connecting the liquid to the external drip nozzle outlet, so that at least a portion of the liquid in the reservoir is transported to the outlet through the liquid flow channel, thereby completing the liquid dripping.

[0008] When the user releases the liquid reservoir, the liquid inside the reservoir is depressurized, the elastic valve body elastically recovers, and moves towards the central seat guide post and fits against it, thereby cutting off the liquid flow between the liquid channel and the external drip nozzle outlet, and back-pressuring the liquid in the liquid channel back into the liquid reservoir.

[0009] When the liquid reservoir is restored, a negative pressure is formed inside the liquid reservoir, causing air to pass through the external nozzle and be filtered through the air filter channel before being filled into the liquid reservoir. This allows the liquid reservoir to be restored, which avoids the difficulty of draining the liquid reservoir after subsequent squeezing, effectively reduces the amount of liquid residue in the liquid reservoir, and prevents the sterile environment of the liquid reservoir from being damaged by the entry of air, thus preventing the growth of bacteria and contamination of the liquid.

[0010] In a preferred embodiment of this application, when the liquid in the liquid reservoir is pressurized, the internal stress of the elastic valve body is lower than the hydraulic pressure generated by the liquid in the gap between the elastic valve body and the center seat, causing the elastic valve body to disengage from the center seat guide post and move towards the outer drip nozzle discharge port, forming a liquid flow channel between the center seat and the elastic valve body, and connecting the liquid with the outer drip nozzle discharge port, so that at least a portion of the liquid in the liquid reservoir is transported to the discharge port through the liquid flow channel, thereby completing the liquid dripping;

[0011] When the liquid in the liquid reservoir loses pressure, the internal stress of the elastic valve body is higher than the hydraulic pressure generated by the liquid in the gap between the elastic valve body and the center seat. This causes the elastic valve body to elastically recover and move towards the guide column of the center seat and fit together, cutting off the liquid flow between the liquid channel and the external drip nozzle outlet. The liquid in the liquid channel is then back-pressurized to the liquid reservoir, thereby preventing air or liquid residue from the external drip nozzle outlet from being drawn into the liquid reservoir by the negative pressure inside the liquid reservoir, which would damage the sterile environment of the liquid reservoir and cause bacteria to grow and contaminate the liquid inside the liquid reservoir.

[0012] In a preferred embodiment of this application, the elastic valve body may be a TPE (based on SEBS substrate) structural component, a TPR (based on SBS substrate) structural component, a thermoplastic polyurethane structural component, a thermoplastic dynamic vulcanized elastomer structural component, a thermoplastic polyester elastomer structural component, a polyolefin thermoplastic elastomer, a rubber structural component, or a silicone structural component.

[0013] In a preferred embodiment of this application, the antibacterial dropper is further provided with evenly distributed stop protrusions on the flange of the central seat base. The stop protrusions are configured to prevent the outer dropper from rotating around the central seat when it abuts against the central seat, thereby making the connection between the central seat and the bottom skirt of the elastic valve body more airtight, and to provide positioning when the outer dropper abuts against the central seat, so that the abutment between the outer dropper and the central seat is faster.

[0014] In a preferred embodiment of this application, a fitting portion is further provided at the end of the elastic valve body near the drain port of the external nozzle, fitting against the guide post end surface of the central seat near the drain port of the external nozzle, thereby making the fitting portion of the elastic valve body fit against the guide post end surface of the central seat, blocking the passage of air into the liquid reservoir through the liquid flow channel.

[0015] Specifically, when the elastic valve body detaches from the central seat and moves towards the drain port of the external nozzle, the fitting part disengages from the guide post end surface of the central seat, allowing the liquid flow channel to be fluidly connected to the drain port of the external nozzle. When the elastic valve body elastically recovers and moves towards the guide post of the central seat, the fitting part adheres to the guide post end surface of the central seat, closing the liquid channel and disconnecting the fluid connection between the liquid flow channel and the drain port of the external nozzle. This forms a fluid seal within the liquid flow channel, thereby more effectively preventing air or residual liquid from the drain port of the external nozzle from being drawn into the liquid storage tank due to the negative pressure within the liquid storage tank, thus disrupting the sterile environment of the liquid storage tank.

[0016] In some embodiments, the antibacterial dropper has a cavity between the elastic valve body and the inner side of the outer nozzle. When the fitting part of the elastic valve body is attached to the guide post, the gap between the elastic valve body and the drain port of the outer nozzle is opened and connected to the cavity to achieve fluid connection. The cavity draws the liquid remaining at the drain port of the outer nozzle into the cavity through capillary action, thus preventing the residual liquid from accumulating and dripping at the drain port.

[0017] The external drip tip is also provided with an air hole, which is configured to connect the cavity with air to ensure air circulation in the cavity, so that the residual liquid in the cavity can evaporate quickly.

[0018] In a preferred embodiment of this application, the antibacterial dropper is provided with an elastic guide in the gap between the elastic valve body and the drain port of the external dropper. The elastic guide is a porous material filling the gap between the elastic valve body and the drain port of the external dropper. When the fitting part of the elastic valve body is attached to the guide post, the elastic guide is stretched and sucks up the liquid remaining in the drain port of the external dropper and transports at least a portion of the residual liquid into the cavity. The residual liquid absorbed and retained by the elastic guide can evaporate rapidly under the action of the cavity.

[0019] In a preferred embodiment of this application, the porous material of the elastic guide is a porous antibacterial material. This application can sterilize or inhibit the growth of bacteria in the elastic guide and contaminate the external dropper outlet while simultaneously drawing out the liquid remaining in the outlet.

[0020] In a preferred embodiment of this application, the porous material can be selected from porous unidirectional moisture-wicking materials or ecological porous fiber cotton. The porous antibacterial material is made by adding antibacterial substances to the porous material through a blending process, a coating process, or a covalent bond fixing process. The antibacterial substance in this embodiment can be selected from silver in its metallic form or in the form of silver compounds, including silver salts, silver chloride, silver sulfadiazine, silver oxide, or silver alloys. It can also be nano-metal particles, especially nano-silver particles, and can also be quaternary ammonium salt antibacterial substances, haloamine antibacterial substances, guanidine antibacterial substances, imidazole antibacterial substances, bromonitol antibacterial substances, etc.

[0021] In some embodiments of this application, an air filter membrane is provided in the air filter channel of the flange. The air filter membrane is integrally formed with the center seat, which not only effectively reduces the assembly difficulty and production process of the liquid distributor, but also makes the air filter membrane and the center seat more reliable in sealing, ensuring the safety and effectiveness of air filtration.

[0022] In a preferred embodiment of this application, the air filter membrane is a sterilization filter membrane made of a thermosetting hydrophobic material, wherein the thermosetting hydrophobic plastic is selected from polyurethane (PU), epoxy resin, polytetrafluoroethylene (PTFE), polyimide, fluorinated acrylate or phenolic resin.

[0023] In a preferred embodiment of this application, the thermosetting hydrophobic plastic is polytetrafluoroethylene (PTFE) or polyimide.

[0024] In some embodiments, the melting method may be selected from hot plate fusion, ultrasonic fusion, or laser fusion.

[0025] In some embodiments, the antibacterial dripper also has a collection hole and a collection groove on the surface of the central seat base near the elastic valve body, which are connected to the inner cavity of the liquid reservoir. The collection groove is configured to allow the liquid squeezed out of the liquid reservoir through the collection hole to quickly and fully contact the elastic valve body, and generate hydraulic pressure in the gap between the elastic valve body and the central seat base to cause the elastic valve body to expand, thereby reducing the squeezing force of the operator on the liquid reservoir during dripping, improving the convenience of the liquid reservoir, avoiding operation failure due to insufficient force, and making it easier to meet the needs of the elderly or children.

[0026] In a preferred embodiment of this application, the liquid collection tank consists of radial grooves radiating radially around the liquid collection hole on the surface of the central seat base near the elastic valve body and annular grooves between the radial grooves.

[0027] The annular grooves are concentrically distributed around the central seat guide post. The liquid collection groove uses radial grooves and annular grooves to allow the liquid guided by the collection hole to spread quickly and evenly on the base surface, so that the contact surface between the elastic valve body and the central seat base is evenly pressurized, thereby making the movement of the elastic valve body towards the drip nozzle discharge port smoother and more controllable.

[0028] In a preferred embodiment of this application, the antibacterial dropper has a flow guide groove on the surface where the guide post of the central seat contacts the elastic valve body. The flow guide groove is fluidly connected to the radial groove of the central seat, allowing the liquid in the radial groove to be delivered rapidly. When the elastic valve body is squeezed by the liquid entering the collection tank and moves towards the drain port of the outer dropper, the elastic valve body seat separates from the guide post of the central seat to form a fluid channel. With the cooperation of the flow guide groove, the fluid channel makes it easier for the liquid in the liquid channel to be delivered to the drain port of the outer dropper. This allows the liquid in the liquid reservoir to enter the collection tank, the liquid channel, the flow guide groove, and the drain port of the outer dropper in a unidirectional manner through the collection hole, and then converge at the drain port of the outer dropper to form a droplet and complete the liquid dripping.

[0029] In a preferred embodiment of this application, the inner side of the outer nozzle of the antibacterial dropper is provided with a guide portion extending towards the surface of the central seat base, which fixes the elastic valve body between the outer nozzle and the central seat base, so that the skirt of the elastic valve body can fit more closely to the base of the central seat base, and guides the elastic valve body to move back and forth along the lip between the outer nozzle drain port and the central seat guide post, thereby enabling the elastic valve body to move along a set trajectory when the liquid is squeezed and expanded, so that the liquid is dripped from the liquid reservoir more smoothly.

[0030] In a preferred embodiment of this application, the bottom of the elastic valve body is further provided with a lip that protrudes outward from the drip nozzle. The lip abuts against the inner side of the outer drip nozzle's outlet, fixing the elastic valve body between the outer drip nozzle and the center seat. This allows the skirt of the elastic valve body to fit more closely to the base of the center seat and guides the elastic valve body to move back and forth along the lip between the outer drip nozzle's outlet and the center seat's guide post. This enables the elastic valve body to move along a set trajectory when the liquid is squeezed and expanded, making the liquid from the liquid reservoir drip more smoothly.

[0031] In a preferred embodiment of this application, the outer edge of the external dropper outlet is an inner conical structure, and the outer edge is provided with a baffle. With the cooperation of the outer edge, the liquid flows out of the liquid channel and then flows back under the action of the baffle, and gathers along the outer edge to form a certain amount of droplets.

[0032] The present invention also provides a unidirectional flow-guided antibacterial liquid dispenser, comprising the above-described unidirectional flow-guided antibacterial dropper, a liquid reservoir connected below the antibacterial dropper, and an outer cap fitted onto the outer nozzle.

[0033] In a preferred embodiment of this application, the sidewall of the liquid reservoir is an elastically deformable sidewall, allowing the user to deform the sidewall inward to compress the liquid reservoir.

[0034] When the user squeezes the side wall of the liquid reservoir to deform inward, the liquid inside the liquid reservoir is pressurized and enters the gap between the elastic valve body and the center seat through the liquid collection hole, and squeezes the elastic valve body to deform elastically, causing the elastic valve body to detach from the guide post of the center seat and move towards the external drip nozzle discharge port, forming a liquid flow channel between the elastic valve body and the center seat. The liquid flow channel is fluidly connected to the external drip nozzle discharge port, and at least a portion of the liquid is delivered from the liquid reservoir through the external drip nozzle discharge port.

[0035] When the user releases the liquid reservoir, the side wall of the liquid reservoir elastically recovers, the liquid in the liquid reservoir loses pressure, the elastic valve body elastically recovers and moves towards the center seat and fits against the guide post, thereby disconnecting the fluid connection between the liquid flow channel and the external drip nozzle outlet, closing the liquid flow channel and squeezing at least a portion of the liquid in the liquid flow channel back into the liquid reservoir.

[0036] When the liquid reservoir is restored, a negative pressure is created inside the liquid reservoir, allowing air to enter the liquid reservoir through the external drip nozzle and the air filter channel after being filtered for sterilization. This compensates for the space in the liquid reservoir that was draining liquid, thereby restoring the liquid reservoir to its original state. This not only avoids difficulties in draining the liquid reservoir later and effectively reduces the amount of liquid residue in the liquid reservoir, but also prevents the entry of air from disrupting the sterile environment of the liquid reservoir and causing bacterial growth that contaminates the liquid.

[0037] In some embodiments, the liquid reservoir may also be a light-protected liquid reservoir, which is made of a non-transparent material. The non-transparent material may be selected from polyethylene (PE), polypropylene (PP), polystyrene (PS), and polyethylene terephthalate (PET).

[0038] In some embodiments, the light-shielding liquid reservoir may also have a light-shielding layer on its outer surface.

[0039] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0040] 1. The antibacterial dropper with unidirectional flow provided in this application controls the opening and closing of the liquid flow channel by cooperating between the central seat inside the inner dropper and the elastic valve body sleeved on the central seat, so that the liquid in the liquid reservoir can flow in one direction only through the liquid flow channel and through the drain port of the outer dropper to complete the dripping, thus avoiding the backflow of liquid remaining near the drain port of the outer dropper into the liquid flow channel after the liquid dripping is completed;

[0041] 2. The antibacterial dropper with unidirectional flow provided in this application, by configuring a flange containing an air filter channel penetrating the base of the central seat on the base of the central seat, not only achieves that the air filter channel and the liquid channel are independent and do not interfere with each other, but also, when a negative pressure is formed in the liquid reservoir relative to the external environment, allows outside air to enter the liquid reservoir after being filtered by the air filter channel through the external dropper and sterilized, thereby compensating for the space of the liquid reservoir for liquid discharge. This avoids subsequent difficulties in draining the liquid reservoir, effectively reduces the amount of liquid residue in the liquid reservoir, and also prevents the entry of air from disrupting the sterile environment of the liquid reservoir and causing bacterial contamination of the liquid.

[0042] 3. The antibacterial dropper with unidirectional flow provided in this application, by configuring a guide portion extending towards the surface of the central seat base on the contact surface between the cavity and the outer nozzle, or by configuring a lip protruding towards the inner side of the outer nozzle on the elastic valve body, allows the skirt of the elastic valve body to fit more closely to the central seat base, and guides the elastic valve body to move back and forth between the drain port of the outer nozzle and the guide post of the central seat along the guide portion, thereby enabling the elastic valve body to move along a set trajectory when the liquid is squeezed and expanded, making the liquid dripping from the liquid reservoir smoother.

[0043] 4. The antibacterial dripper with unidirectional flow provided in this application has a collection hole and a collection tank connected to the inner cavity of the liquid reservoir on the base between the guide post and the flange. The collection tank is configured to allow the extruded liquid through the collection hole to fully contact and squeeze the elastic valve body, thereby reducing the squeezing force on the liquid reservoir by the operator during dripping, improving the convenience of the liquid reservoir, and making it easier to meet the needs of the elderly or children for using the liquid reservoir.

[0044] 5. The antibacterial dropper with unidirectional flow provided in this application further includes a cavity between the elastic valve body and the inner side of the outer nozzle. When the fitting part of the elastic valve body is attached to the guide post, the gap between the elastic valve body and the drain port of the outer nozzle is opened, and fluid connection is achieved through communication with the cavity. The cavity draws residual liquid adhering to the drain port of the outer nozzle into the cavity through capillary action, preventing residual liquid from accumulating and dripping at the drain port. The outer nozzle also has an air hole configured to connect the cavity to the outside, ensuring air circulation within the cavity and allowing residual liquid within the cavity to evaporate quickly.

[0045] 6. The antibacterial dropper with unidirectional flow provided in this application has a flow guide groove on the surface of the guide post of the central seat that contacts the elastic valve body. The flow guide groove is fluidly connected to the radial groove of the central seat, so that the liquid in the radial groove can be delivered quickly.

[0046] 7. The antibacterial dripper with unidirectional flow provided in this application, wherein the air filter membrane and the center seat are integrally fused together, not only effectively reduces the assembly difficulty and production process of the liquid distributor, but also makes the air filter membrane and the center seat more reliably sealed, ensuring the safety and effectiveness of air filtration. Attached Figure Description

[0047] Figure 1 Schematic diagram of the antibacterial dropper described in Example 1;

[0048] Figure 2 Exploded view of the antibacterial dropper structure described in Example 1;

[0049] Figure 3 Schematic diagram of the central seat structure of the antibacterial dropper described in Example 1

[0050] Figure 4 Schematic diagram of the antibacterial dripping head described in Example 1 when the elastic valve body is detached from the center seat;

[0051] Figure 5 Schematic diagram of the antibacterial dripping head described in Example 1 when it is attached to the center seat of the elastic valve body;

[0052] Figure 6 Schematic diagram of the antibacterial dropper described in Example 2;

[0053] Figure 7 Explosion-proof schematic diagram of the antibacterial dropper described in Example 2;

[0054] Figure 8 Schematic diagram of the elastic valve body of the antibacterial dripper described in Example 2;

[0055] Figure 9 Schematic diagram of the antibacterial dripping head described in Example 2 when the elastic valve body is detached from the center seat;

[0056] Figure 10 Schematic diagram of the antibacterial dripping head as described in Example 2 when it is attached to the center seat of the elastic valve body;

[0057] Figure 11 Example 3 shows a schematic diagram of the antibacterial dropper with a collection hole and a collection groove on the central base;

[0058] Figure 12 Example 4: A schematic diagram of the antibacterial dropper with a flow guide groove on the guide post of the central seat.

[0059] Figure 13 Schematic diagram of the antibacterial dropper described in Example 5, which opens intermittently during the respiration interval of the liquid reservoir to collect residual liquid. Figure 14 Example 5: Schematic diagram of the antibacterial dripper with an elastic flow guide within the gap.

[0060] Figure 15 Example 6: A schematic diagram of the structure of the antibacterial dropper with a baffle installed on the outer edge of the drain port of the outer dropper nozzle.

[0061] Figure 16 Schematic diagram of the unidirectional liquid distributor described in Example 7

[0062] Figure 17 Exploded view of the unidirectional liquid distributor described in Example 7

[0063] Illustration:

[0064] 1-Antibacterial dropper, 11-Inner dropper, 111-Center seat, 1111-Guide post, 1112-Base, 1113-Collection hole, 1114-Collection trough, 1115-Flow guide groove, 1116-Flange, 1117-Stop protrusion, 112-Elastic valve body, 1121-Skirt, 1122-Fitting part, 1123-Lip, 12-Liquid flow channel, 13-Air filter channel, 14-Air filter membrane, 15-Outer dropper, 151-Guide part, 152-Air hole, 153-Elastic flow guide, 154-Drain port, 155-Outer edge, 156-Baffle; 16-Cavity

[0065] 2-Liquid storage tank, 21-Side wall

[0066] 3-Outer Cover Detailed Implementation

[0067] The present invention will now be described in detail with reference to the accompanying drawings.

[0068] To make the objectives, technical solutions, and advantages of this application clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0069] Example 1

[0070] like Figure 1-5 The illustration shows a unidirectional antibacterial dropper, wherein the antibacterial dropper 1 includes an inner nozzle 11 consisting of a central seat 111 fixedly connected to a liquid reservoir 2 and an elastic valve body 112 movably sleeved on a guide post 1111 located at the center of the central seat 111, an outer nozzle 15 sleeved on the inner nozzle 11, and a liquid flow channel 12 formed by the cooperation of the central seat 111, the elastic valve body 112 and the liquid reservoir 2. A flange 1116 is provided on the base 1112 of the central seat 111, and an air filter channel 13 is provided in the flange 1116 to pass through the base 1112 for air to flow through the liquid reservoir 2.

[0071] In this embodiment, the bottom skirt 1121 of the elastic valve body 112 of the antibacterial dropper 1 is sealed to the center seat 111, so that pressurized liquid and air cannot pass through the connection between the bottom skirt 1121 of the elastic valve body 112 and the center seat 111.

[0072] When the user squeezes the liquid reservoir 2, the liquid in the liquid reservoir 2 is pressurized and enters the gap between the bottom of the elastic valve body 112 and the base 1112 of the center seat 111, and squeezes the elastic valve body 112 to deform elastically, causing the elastic valve body 112 to separate from the center seat 111 and move towards the drain port 154 of the outer nozzle 15. A liquid flow channel 12 is formed between the center seat 111 and the elastic valve body 112, which conducts fluid connection with the drain port 154 of the outer nozzle 15, so that at least a part of the liquid in the liquid reservoir 2 is transported to the drain port 154 through the liquid flow channel 12, thereby completing the liquid dripping.

[0073] When the user releases the liquid reservoir 2, the liquid in the liquid reservoir 2 loses pressure, the elastic valve body 112 elastically recovers, and the elastic valve body 112 moves towards the guide column 1111 of the center seat 111 and fits together, thereby cutting off the liquid flow between the liquid flow channel 12 and the drain port 154 of the external drip nozzle 15, and back-pressing the liquid in the liquid flow channel 12 back into the liquid reservoir 2.

[0074] When the liquid reservoir 2 is restored, a negative pressure is formed inside the liquid reservoir 2, causing air to pass through the external drip nozzle 15 and be filtered through the air filter channel 13 after sterilization before filling the liquid reservoir 2. This allows the liquid reservoir 2 to be restored, which avoids the difficulty of draining the liquid from the liquid reservoir 2 after subsequent squeezing, effectively reduces the amount of liquid residue in the liquid reservoir 2, and prevents the sterile environment of the liquid reservoir 2 from being destroyed by the entry of air, thus preventing the growth of bacteria and contamination of the liquid.

[0075] The antibacterial dropper described in this embodiment controls the opening / closing of the liquid flow channel 12 through the cooperation of the liquid reservoir 2, the central seat 111, and the elastic valve body 112, thereby achieving unidirectional liquid dripping from the drain port 154 of the external dropper 15. This prevents liquid or air hanging on the drain port 154 from entering in the opposite direction through the liquid flow channel 12, thus disrupting the sterile environment of the liquid reservoir 2 and causing bacterial growth that contaminates the liquid.

[0076] In this embodiment, when the user squeezes the liquid reservoir 2, the internal stress of the elastic valve body 112 is lower than the hydraulic pressure generated by the liquid in the gap between the elastic valve body 112 and the center seat 111. This causes the elastic valve body 112 to expand and deform, detach from the guide post 1111 of the center seat 111, and move towards the drain port 154 of the outer nozzle 15. This forms a liquid flow channel 12 between the center seat 111 and the elastic valve body 112, establishing a fluid connection with the drain port 154 of the outer nozzle 15. At least a portion of the liquid in the liquid reservoir 2 is then transported to the drain port via the liquid flow channel 12. 154, thus completing the liquid dripping; when the liquid in the liquid reservoir 2 loses pressure, the internal stress of the elastic valve body 112 is higher than the hydraulic pressure generated by the liquid in the gap between the elastic valve body 112 and the center seat 111, causing the elastic valve body 112 to elastically recover and move towards the guide column 1111 of the center seat 111 and fit together, thereby cutting off the liquid flow between the liquid flow channel 12 and the drain port 154 of the outer drip nozzle 15, and back-pressing the liquid in the liquid flow channel 12 to the liquid reservoir 2, thereby preventing air from entering and destroying the sterile environment of the liquid reservoir 2, and preventing bacteria from growing and contaminating the liquid.

[0077] In this embodiment, the antibacterial dropper 1 also has a guide portion 151 extending toward the surface of the center seat 111 base 1112 on the inner side of the outer dropper 15. The guide portion 151 is configured to abut against the elastic valve body 112, which not only allows the skirt 1121 of the elastic valve body 112 to fit more closely to the center seat 111 base 1112, but also guides the elastic valve body 112 to move back and forth along the guide portion 151 between the outer dropper 155 drain port 154 and the center seat 111 guide post 1111. This enables the elastic valve body 112 to move along a set trajectory when the liquid is squeezed and expanded, making the liquid from the liquid reservoir drip more smoothly.

[0078] In this embodiment, the antibacterial dropper also has stop protrusions 1117 evenly distributed on the flange 1116 of the base of the center seat 111. The stop protrusions 1117 are configured to prevent the outer dropper 15 from rotating around the center seat 111 when it abuts against the center seat 111, thereby making the connection between the center seat 111 and the bottom skirt 1121 of the elastic valve body 112 more airtight, and to provide positioning when the outer dropper 15 abuts against the center seat 111, thereby making the abutment between the outer dropper 15 and the center seat 111 faster.

[0079] In this embodiment, the antibacterial dropper 2 is also provided with a fitting part 1122 at the end of the elastic valve body 112, which fits onto the end surface of the guide post 1111 of the center seat 111 of the outer dropper 15 drain port 154, thereby blocking the passage of air through the liquid flow channel 12 into the liquid storage tank 2. When the elastic valve body 112 expands under pressure, it causes the fitting part 1122 to detach from the end surface of the guide post 1111 of the center seat 111 and move towards the drain port 154 of the outer nozzle 15, so that the liquid flow channel 12 is connected to the drain port 154 of the outer nozzle 15. When the elastic valve body 112 recovers its elasticity, it moves towards the guide post 1111 of the center seat 111, so that the fitting part 1122 fits against the end surface of the guide post 1111 of the center seat 111, so that the liquid flow channel 12 is disconnected from the drain port 154 of the outer nozzle 15, thereby forming a fluid seal in the liquid flow channel 12, effectively preventing air or residual liquid in the drain port 154 of the outer nozzle 15 from being drawn into the liquid storage tank 2 by the negative pressure of the liquid storage tank 2, thus destroying the sterile environment of the liquid storage tank 2 and the liquid flow channel 12.

[0080] In this embodiment, the air filter channel 13 of the antibacterial dripper 1 is equipped with an air filter membrane 14 for filtering air entering the liquid storage tank 2. The air filter membrane 14 and the center seat 111 are fused together as a single component via insert injection molding. This not only effectively reduces the assembly difficulty and production process of the antibacterial dripper 1 and the liquid dispenser 2, but also makes the seal between the air filter membrane 14 and the center seat 111 more reliable, ensuring the safety and effectiveness of air filtration.

[0081] The air filter membrane 14 described in this application is a sterilization filter membrane made of a thermosetting hydrophobic material, wherein the thermosetting hydrophobic plastic is selected from polyurethane (PU), epoxy resin, polytetrafluoroethylene (PTFE), polyimide, fluorinated acrylate or phenolic resin, and more preferably polytetrafluoroethylene (PTFE) or polyimide.

[0082] The melting method described in this application can be selected from hot plate fusion, ultrasonic fusion, or laser fusion.

[0083] The elastic valve body 112 described in this application can be a TPE (based on SEBS substrate) structural component, a TPR (based on SBS substrate) structural component, a thermoplastic polyurethane structural component, a thermoplastic dynamic vulcanized elastomer structural component, a thermoplastic polyester elastomer structural component, a polyolefin thermoplastic elastomer, a rubber structural component, or a silicone structural component.

[0084] In this embodiment, the air filter membrane 14 and the center seat 111 are fused together as an integral component by insert injection molding, which can be completed in the following steps:

[0085] 1) Punch the air filter membrane 14 according to the dimensions of the air filter channel 13;

[0086] 2) Transfer the punched air filter membrane 14 into the center mold;

[0087] 3) Inject the molten injection material into the central mold base and fuse it with the air filter membrane 14 to form a mold. The fusion temperature is 120-250℃, the fusion pressure is 0.2-1.5MPa, and the fusion time is 3-15 seconds.

[0088] 4) After the air filter membrane 14 and the center seat 111 are cooled and formed in the center seat mold, they can be taken out.

[0089] Example 2

[0090] The difference between the antibacterial dropper described in this embodiment and that in Embodiment 1 is that, Figure 6-10 As shown, the bottom of the elastic valve body 112 is also provided with a lip 1123 protruding outward toward the drip nozzle 15. The lip 1123 abuts against the inner side of the drain port 154 of the outer drip nozzle 15, fixing the elastic valve body 112 between the outer drip nozzle 15 and the center seat 111. This allows the skirt 1121 of the elastic valve body 112 to fit more closely to the base 1112 of the center seat 111, and guides the elastic valve body 112 to move back and forth between the drain port 154 of the outer drip nozzle 15 and the guide post 1111 of the center seat 111 along the lip 1123. This enables the elastic valve body 112 to move along a set trajectory when the liquid is squeezed and expanded, making the liquid drip from the liquid reservoir more smoothly.

[0091] Example 3

[0092] The difference between the antibacterial dropper described in this embodiment and that in Embodiment 1 is that, Figure 11 As shown, the antibacterial dripper also has a collection hole 1113 and a collection groove 1114 on the surface of the center seat 111 base 1112 near the elastic valve body 112, which are connected to the inner cavity of the liquid reservoir 2. The collection groove 1114 is configured to allow the liquid squeezed out of the liquid reservoir 2 through the collection hole 1113 to quickly and fully contact the elastic valve body 112, and generate hydraulic pressure in the gap between the elastic valve body 112 and the center seat 111 base 1112 to cause the elastic valve body 112 to expand, thereby reducing the squeezing force of the operator on the liquid reservoir 2 during dripping, improving the convenience of the liquid reservoir 2, avoiding operation failure due to insufficient force, and making it easier to meet the needs of the elderly or children.

[0093] In this embodiment, the liquid collection tank 1114 consists of radial grooves radiating radially around the liquid collection hole 1113 on the surface of the central seat 111 base 1112 near the elastic valve body 112, and annular grooves between the radial grooves. The annular grooves are concentrically distributed around the guide post 1111 of the central seat 111. The design of the radial grooves and annular grooves in the liquid collection tank 1114 allows the liquid guided by the liquid collection hole 1113 to spread rapidly and evenly on the surface of the base 1112, ensuring uniform pressure on the contact surface between the elastic valve body 112 and the central seat 111 base 1112. This makes the movement of the elastic valve body 112 towards the outward drip nozzle 15 discharge port 154 smoother and more controllable.

[0094] Example 4

[0095] The difference between the antibacterial dropper described in this embodiment and that in Embodiment 3 is that, for example... Figure 12 As shown, the antibacterial dropper has a guide groove 1115 on the surface where the guide post 1111 of the center seat 111 contacts the elastic valve body 112. The guide groove 1115 is fluidly connected to the radial groove in the liquid collection tank 1114 of the center seat 111, so that the liquid in the radial groove can be quickly delivered to the drain port 154 of the outer dropper 15 through the guide groove 1115.

[0096] When the elastic valve body 112 is squeezed by the liquid entering the liquid collection tank 1114 and moves towards the drain port 154 of the outer nozzle 15, the elastic valve body seat 117 disengages from the guide post 1111 of the center seat 111 to form a fluid channel 12. With the cooperation of the guide groove 1115, the fluid channel 12 makes it easier to deliver the liquid in the liquid channel 12 to the drain port 154 of the outer nozzle 15. In this way, the liquid in the liquid reservoir 2 enters the liquid collection tank 1114, the liquid channel 12, the guide groove 1115 and the drain port 15 of the outer nozzle 15 in a one-way manner through the liquid collection hole 1113, and then gathers at the drain port 154 of the outer nozzle 15 to form droplets and complete the liquid dripping.

[0097] Example 5

[0098] The difference between the antibacterial dropper described in this embodiment and that in Embodiment 1 is that, Figure 13-14 As shown, the antibacterial dropper has a cavity 16 between the elastic valve body 112 and the inner side of the outer dropper 15. When the fitting part 1122 of the elastic valve body 112 is attached to the guide post 1111, the gap between the elastic valve body 112 and the drain port 154 of the outer dropper 15 is opened and connected to the cavity 16 to achieve fluid connection. The cavity 16 draws the residual liquid attached to the drain port 154 of the outer dropper 15 into the cavity 16 through the siphon effect, avoiding the accumulation and dripping of residual liquid in the drain port 154.

[0099] In this embodiment, the maximum distance between the elastic valve body 112 and the inner wall of the outer drip nozzle 15 within the cavity is 4 mm. In other embodiments of this application, the maximum distance between the elastic valve body 112 and the inner wall of the outer drip nozzle 15 can be 2 mm, 3 mm, 5 mm, 7 mm, or 10 mm. In this embodiment, the gap diameter between the antibacterial drip head and the drain port 154 of the outer drip nozzle 15 can be 0.1-1.5 mm. In other embodiments of this application, the gap diameter can be 0.1 mm, 0.2 mm, 0.3 mm, 0.5 mm, 1.0 mm, or 1.5 mm.

[0100] The external drip nozzle 15 is also provided with an air hole 152, which is configured to connect the cavity 16 with the air, ensuring air circulation in the cavity 16, so that the residual liquid in the cavity 16 can evaporate quickly under the action of air.

[0101] In this embodiment, the antibacterial dropper 1 also has an elastic guide 153 provided in the gap between the elastic valve body 112 and the drain port 154 of the external dropper 15. The elastic guide 153 is made of a porous material. When the fitting part 1122 of the elastic valve body 112 is attached to the guide post 1111, the elastic guide 153 is stretched, increasing its volume to draw in the liquid remaining near the drain port 154 of the external dropper 15 and transfer a portion of the residual liquid into the cavity 16. The residual liquid absorbed and retained by the elastic guide 154 is connected to the air under the action of the cavity 16, and can evaporate rapidly under the action of the air.

[0102] The porous material of the elastic guide 153 is a porous antibacterial material. The elastic guide 153 described in this application can sterilize or inhibit the growth of residual liquid in the drain port 154 of the outer dropper 15 while simultaneously drawing out the liquid. This prevents bacterial growth in the elastic guide 153 from contaminating the drain port 154 of the outer dropper 15.

[0103] In this embodiment, the porous material can be selected from porous unidirectional moisture-wicking materials or ecological porous fiber cotton. The porous antibacterial material is made by adding antibacterial substances to the porous material through blending, coating or covalent bonding and other fixing processes.

[0104] The antibacterial substance described in this embodiment can be selected from silver in its metallic form or in the form of silver compounds, including silver salts, silver chloride, silver sulfadiazine, silver oxide, or silver alloys. It can also be nano-metal particles, especially nano-silver particles, and can also be quaternary ammonium salt antibacterial substances, haloamine antibacterial substances, guanidine antibacterial substances, imidazole antibacterial substances, bromonitol antibacterial substances, etc.

[0105] Example 6

[0106] The difference between the antibacterial dropper described in this embodiment and that in Embodiment 1 is that, Figure 15 As shown, the outer edge 155 of the drain port 154 of the external dropper 15 is an inner conical structure, and the outer edge 155 of the drain port 154 of the external dropper 15 is provided with a baffle 156. With the cooperation of the baffle 156 with the outer edge 155, the liquid flows out from the liquid channel 112 and flows back along the outer edge 155 under the action of the baffle 156, and gathers on the outer edge 155 to form a certain amount of liquid droplets, thereby completing the delivery of a certain amount of liquid.

[0107] Example 7

[0108] This embodiment provides a liquid dispenser with unidirectional flow guidance, such as... Figure 1-5 , Figure 16-17 As shown, it includes any one of the antibacterial dropper 1 with unidirectional flow in Examples 1-6, a liquid reservoir 2 connected below the antibacterial dropper 1, and an outer cover 3 sleeved on the antibacterial dropper 1, wherein the side wall 21 of the liquid reservoir is an elastically deformable side wall to allow the user to deform the side wall inward to squeeze the liquid reservoir 2.

[0109] In a preferred embodiment of this application, the sidewall of the liquid reservoir 2 is an elastically deformable sidewall, allowing the user to deform the sidewall inward to squeeze the liquid inside the liquid reservoir 2.

[0110] When the user squeezes the side wall of the liquid reservoir 2 to deform inward, the liquid in the liquid reservoir 2 is pressurized and enters the gap between the elastic valve body 112 and the base of the center seat 111 through the liquid collection hole 1113, and squeezes the elastic valve body 112 to deform elastically, so that the elastic valve body 112 is separated from the guide post 1111 of the center seat 111 and moves to the drain port 154 of the outer drip nozzle 15, forming a liquid flow channel 122 between the elastic valve body 112 and the center seat 111, and is fluidly connected to the drain port 154 of the outer drip nozzle 15, and at least a portion of the liquid is transported from the liquid reservoir 2 through the drain port 154 of the outer drip nozzle 15.

[0111] When the user releases the liquid reservoir 2, the side wall of the liquid reservoir 2 expands outward and elastically recovers, the liquid in the liquid reservoir 2 loses pressure, causing the elastic valve body 112 to elastically recover and move towards the center seat 111, and fit against the guide column 1111, thereby disconnecting the fluid connection between the liquid flow channel 12 and the drain port 154 of the external drip nozzle 15, closing the liquid flow channel 12, and squeezing at least a portion of the liquid in the liquid flow channel 12 back into the liquid reservoir 2.

[0112] During the recovery process of liquid storage tank 2, a negative pressure is formed inside liquid storage tank 2, allowing air to enter liquid storage tank 2 after being filtered through air filter channel 13 via external nozzle 15 and sterilization. This compensates for the space in liquid storage tank 2 that is draining liquid, thereby restoring liquid storage tank 2. This not only avoids subsequent difficulties in draining liquid from liquid storage tank 2 and effectively reduces the amount of liquid residue in liquid storage tank 2, but also prevents the entry of air from damaging the sterile environment of liquid storage tank 2 and causing bacterial growth that contaminates the liquid.

[0113] The liquid storage container 2 can also be a light-shielding liquid storage container, which is made of a non-transparent material or has a light-shielding layer on its outer surface. In this embodiment, the light-shielding layer can be achieved by coating a layer of light-shielding material on the outer sidewall of the liquid storage container.

[0114] The non-transparent material described in this embodiment can be selected from polyethylene (PE), polypropylene (PP), polystyrene (PS), polyethylene terephthalate (PET); the light-blocking material described in this embodiment is a commercially available conventional light-blocking material, such as one or more of resin, TiO2 light-blocking agent, SiC light-blocking agent, carbon material light-blocking agent, or melanin.

[0115] The liquid storage device 2 described in this embodiment uses light-shielding materials or structures, which helps the liquid dispenser in this embodiment to meet the light-shielding requirements of photosensitive substances, thereby improving the stability of the liquid in the liquid storage device 2.

[0116] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A unidirectional flow-guiding antibacterial dropper, comprising an inner nozzle consisting of a central seat fixedly connected to a liquid reservoir and an elastic valve body movably sleeved on a guide post of the central seat, an outer nozzle sleeved on the inner nozzle, and a liquid flow channel formed by the cooperation of the central seat, the elastic valve body, and the liquid reservoir, characterized in that, A flange is provided on the base of the central seat, and an air filter channel is provided inside the flange to pass through the base and to conduct air into the liquid storage tank.

2. The antibacterial dropper with unidirectional flow guidance according to claim 1, characterized in that, When the liquid in the liquid reservoir is pressurized, the internal stress of the elastic valve body is lower than the hydraulic pressure generated by the liquid in the gap between the elastic valve body and the base of the center seat, causing the elastic valve body to disengage from the guide post of the center seat and move toward the drain port of the external nozzle, forming a liquid flow channel between the center seat and the elastic valve body, connecting the liquid to the drain port of the external nozzle, so that at least a portion of the liquid in the liquid reservoir is transported to the drain port of the external nozzle through the liquid flow channel; When the liquid in the liquid reservoir loses pressure, the internal stress of the elastic valve body is higher than the hydraulic pressure generated by the liquid in the gap between the elastic valve body and the base of the center seat, causing the elastic valve body to elastically recover, move towards the guide column of the center seat and fit together, close the liquid flow channel, cut off the liquid flow between the liquid flow channel and the external drip nozzle outlet, and back-press the liquid in the liquid flow channel to the liquid reservoir.

3. The antibacterial dropper with unidirectional flow guidance according to claim 1, characterized in that, Stop protrusions are evenly distributed on the flange of the central seat.

4. The antibacterial dropper with unidirectional flow guidance according to claim 1, characterized in that, An air filter membrane is provided in the air filter channel of the flange, and the air filter membrane is integrally formed with the center seat.

5. The antibacterial dropper with unidirectional flow guidance according to claim 4, characterized in that, The air filter membrane is a sterilization filter membrane made of thermosetting hydrophobic material, wherein the thermosetting hydrophobic material is selected from polyurethane, epoxy resin, polytetrafluoroethylene, polyimide, fluorinated acrylate or phenolic resin.

6. The antibacterial dropper with unidirectional flow guidance according to claim 4, characterized in that, The method for melting the air filter membrane and the center seat can be hot plate fusion, ultrasonic fusion, or laser fusion.

7. The antibacterial dropper with unidirectional flow guidance according to claim 1, characterized in that, A liquid collection hole and a liquid collection tank communicating with a liquid reservoir are provided on the surface of the central seat base near the elastic valve body.

8. The antibacterial dropper with unidirectional flow guidance according to claim 7, characterized in that, The liquid collection tank consists of radial grooves radiating radially around the liquid collection hole on the surface of the central seat base near the elastic valve body and annular grooves between the radial grooves.

9. The antibacterial dropper with unidirectional flow guidance according to claim 8, characterized in that, The annular grooves are distributed concentrically around the central guide post.

10. The antibacterial dropper with unidirectional flow guidance according to claim 8, characterized in that, A flow guide groove is provided on the contact surface between the guide post of the central seat and the elastic valve body. The flow guide groove is fluidly connected to the radial groove, so that the liquid in the collection tank can be delivered quickly.

11. The antibacterial dropper with unidirectional flow guidance according to claim 1, characterized in that, An adhesive portion is provided at the end of the elastic valve body near the drain port of the external nozzle. The adhesive portion adheres to the end surface of the guide post near the drain port of the external nozzle, so that when the elastic valve body is in contact with the end surface of the guide post of the center seat, it blocks air or residual liquid outside the drain port of the external nozzle from entering the liquid storage tank through the liquid flow channel.

12. The antibacterial dropper with unidirectional flow guidance according to claim 11, characterized in that, A cavity is provided between the elastic valve body and the inner side of the outer nozzle. When the fitting part of the elastic valve body is attached to the guide post of the center seat, the cavity collects the liquid residue adhering to the drain port of the outer nozzle.

13. The antibacterial dropper with unidirectional flow guidance according to claim 12, characterized in that, The external drip tip is provided with an air hole, which allows the residual liquid in the cavity to evaporate quickly through air circulation.

14. The antibacterial dropper with unidirectional flow guidance according to claim 13, characterized in that, An elastic guide is provided in the gap between the elastic valve body and the external drip nozzle discharge port. When the elastic guide is attached to the guide post of the center seat at the fitting part of the elastic valve body, it draws the liquid remaining on the external drip nozzle discharge port and transfers at least a portion of the liquid into the cavity.

15. The antibacterial dropper with unidirectional flow guidance according to claim 14, characterized in that, The elastic guide is a porous material that fills the gap between the elastic valve body and the drain port of the external nozzle. The porous material can be a porous unidirectional moisture-wicking material or an eco-friendly porous fiber cotton.

16. The antibacterial dropper with unidirectional flow guidance according to claim 1, characterized in that, The outer edge of the drain port of the external dropper is an inner conical structure with a baffle. With the cooperation of the baffle and the outer edge, the liquid flowing through the liquid channel gathers along the outer edge to form a certain amount of droplets.

17. The antibacterial dropper with unidirectional flow guidance according to claim 1, characterized in that, A guide portion extending toward the surface of the central seat base is provided on the inner side of the outer nozzle.

18. The antibacterial dropper with unidirectional flow guidance according to claim 1, characterized in that, The elastic valve body is provided with a lip that protrudes into the inner side of the outer nozzle.

19. A unidirectional flow-guiding antibacterial liquid dispenser, characterized in that, The unidirectional flow-guided antibacterial liquid dispenser includes the unidirectional flow-guided antibacterial dropper as described in any one of claims 1-18, a liquid reservoir connected below the antibacterial dropper, and an outer cap fitted onto the outer nozzle of the antibacterial dropper.

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