Quantitative liquid dropping bottle capable of isolating air

Abstract

The invention discloses an air isolation quantitative liquid dropping bottle. The air isolation quantitative liquid dropping bottle comprises a liquid storage bottle, a liquid outlet head, a reset spring, a press-fit bottle cap and a leakage-proof water dropper. The quantitative cavity and the leakage-proof dropper are arranged in the liquid dropping bottle, it is guaranteed that liquid medicine is not polluted by external air in the using process, and accurate quantitative dropping of the liquid medicine can be achieved. Due to the design of the leakage-proof dripper, contact between air and liquid medicine is effectively isolated, it is guaranteed that the liquid medicine is kept sterile when dripped out, and invasion of external microorganisms and dust is avoided. Compared with the prior art, the liquid dropping bottle has the advantages that more stable and reliable sealing performance is achieved, the safety of the liquid dropping bottle and the effectiveness of liquid medicine are greatly improved, and the high requirements for sterility and accurate dropping amount when the liquid medicine is provided for sensitive parts such as eyes, ears, noses and mouths are met.

Description

Technical Field

[0001] This application relates to the field of eye drop device technology, specifically to an air-isolated metering drop bottle. Background Technology

[0002] Currently available dropper bottles generally suffer from insufficient sealing performance when dispensing medications to the eyes, ears, nose, and mouth. These devices allow outside air to enter, contaminating the medication and affecting its safety and efficacy. Medications for sensitive areas such as the eyes, ears, and nose require a high degree of purity and sterility to prevent contamination by microorganisms, dust, or other impurities. Existing dropper bottles, due to their poor sealing, cannot effectively prevent air from entering, thus failing to meet the needs of these specialized applications. Therefore, improving the sealing performance of dropper bottles to ensure uncontaminated medications has become a pressing technical challenge. Summary of the Invention

[0003] This application provides an air-isolated metering dropper bottle, which can solve the problem of poor sealing in existing dropper bottle devices, where external air can easily enter the dropper bottle and cause drug contamination. This is especially true when providing drugs to sensitive areas such as the eyes, ears, nose, and mouth, where existing devices cannot guarantee the sterility and safety of the drug.

[0004] This application provides an air-isolated metering dropper bottle, which includes a storage bottle, a dispensing head, a return spring, a pressure cap, and a leak-proof dropper. The dispensing head is sealed to the mouth of the storage bottle, the return spring is sleeved on the outside of the dispensing head, the pressure cap is engaged with the storage bottle, and the pressure cap presses the return spring to seal the dispensing head. The pressure cap has a metering cavity corresponding to the dispensing head, and the leak-proof dropper is connected to the pressure cap and communicates with the metering cavity. The leak-proof drip head includes a drip tip, a valve ball, a valve ball spring, and a residual plug. The drip tip is sealed and fitted outside the liquid outlet. The drip tip and the liquid outlet are mutually locked and fixed inside the press-fit cap. The press-fit cap has a squeezing port corresponding to the liquid outlet. Inside the drip tip, corresponding to the squeezing port, there are a valve chamber, a leak-proof chamber, and a drip outlet in sequence. The inner walls of the valve chamber and the leak-proof chamber have grooves. The diameter of the leak-proof chamber is smaller than the diameter of the valve chamber. The valve ball is movably disposed in the valve chamber. The residual plug is disposed in the leak-proof chamber. The valve ball spring is fitted outside the residual plug and disposed in the leak-proof chamber. The valve ball spring and the valve ball support each other to press the residual plug into the leak-proof chamber. The leak-proof chamber is connected to the drip outlet through the groove located outside the residual plug. When the press-fit cap is in a free state, the metering chamber is filled with liquid medicine, and the valve bead is located in the valve chamber and is supported by the valve bead spring to block the dispensing port; when the press-fit cap moves toward the storage bottle, the liquid medicine in the metering chamber squeezes the valve bead toward the valve bead spring side to form a temporary channel and discharges the liquid medicine through the groove from the dispensing port.

[0005] Furthermore, the dispensing head includes a core rod seat and a piston. The core rod seat is hollow and has a flow guiding cavity. The side wall of the core rod seat has a flow guiding channel. The core rod seat is sealed to the mouth of the storage bottle. The piston is located at the end of the core rod seat. The constant volume of the metering chamber controls the amount of medicine dispensed each time. The piston can be movably extended into the metering chamber. The return spring is sleeved on the outside of the core rod seat; the outside of the core rod seat is provided with a support plane, and the end of the core rod seat away from the piston forms an annular base plate. The annular base plate is provided with a spring fixing part. The first end of the return spring is supported on the support plane of the core rod seat, and the second end of the return spring is locked on the spring fixing part. The return spring is supported between the core rod seat and the piston cylinder. When the pressure cap is in a free state, the return spring opens the core rod seat and the piston cylinder so that the piston is outside the metering chamber. The flow guiding chamber, the flow guiding channel, the flow guiding chamber and the metering chamber are interconnected so that the metering chamber is filled with liquid medicine. When the pressure cap moves toward the storage bottle, the return spring is compressed, which reduces the distance between the core rod seat and the piston cylinder, and the piston extends into the metering chamber.

[0006] Furthermore, the compression cap includes an outer shell and a piston cylinder. The outer shell is engaged with the liquid storage bottle for limiting and locking. The piston cylinder is fixed inside the outer shell. The piston cylinder presses against the return spring sleeved on the outside of the core rod seat. The piston cylinder has a metering chamber and a flow guiding chamber inside. The flow guiding chamber is correspondingly arranged with the core rod seat. The diameter of the flow guiding chamber is larger than the diameter of the metering chamber. The piston cylinder has the squeezing port corresponding to the metering chamber.

[0007] Furthermore, the compression cap also includes a rubber head, which is fixed to the end of the piston cylinder. The rubber head connects the dispensing port to the valve cavity. The rubber head is positioned corresponding to the valve cavity and constitutes part of the valve cavity structure. The end of the rubber head facing the piston cylinder has an outer circular platform and an inner circular platform. The rubber head is interference-fitted with the inner wall of the dropper through the outer circular platform. The inner circular platform is arranged around the end of the piston cylinder. The inner edge of the rubber head connecting to the valve cavity has an inner circular rib. The inner circular rib cooperates with the valve ball to control the flow and cut-off of the liquid channel.

[0008] Furthermore, the piston cylinder is provided with a transition cavity at the position corresponding to the core rod seat. The diameter of the transition cavity is larger than the diameter of the metering cavity. Multiple bosses are provided at the position where the transition cavity connects to the metering cavity. The gap between two bosses forms a flow channel. The bosses limit the swing clearance of the piston. When an external force is applied to move the pressure cap toward the storage bottle to complete one drip, the external force is released and the pressure cap moves away from the storage bottle under the action of the return spring. The metering chamber forms a closed negative pressure chamber. As the piston continues to return to its original position, when the piston passes through the flow channel, the metering chamber is connected to the storage bottle through the guide chamber, the guide channel and the storage bottle. Under the negative pressure of the metering chamber, the medicine in the storage bottle is drawn into the metering chamber for the next drip.

[0009] Furthermore, at least one sealing ring is provided on the outer side of the core rod seat near the middle of the piston, and the transition cavity of the core rod seat and the piston cylinder are sealed together by the sealing ring; a snap-fit ​​protrusion is provided on the inner side of the end of the core rod seat away from the piston, and a protruding connecting ring is provided on the outer side of the bottle mouth of the liquid storage bottle; the core rod seat and the bottle mouth of the liquid storage bottle are snapped together by the snap-fit ​​protrusion and the protruding connecting ring, and a sealing gasket is also provided between the core rod seat and the bottle mouth of the liquid storage bottle.

[0010] Furthermore, the drip nozzle is provided with a fixing base for fixing the annular base plate of the piston. The fixing base is provided with multiple supporting protrusions corresponding to the annular base plate of the piston. The fixing base is provided with multiple hooks corresponding to the edge of the annular base plate of the piston. The multiple hooks form a ring to engage and limit the annular base plate.

[0011] Furthermore, the liquid storage bottle includes a bottle body and a bottle seat. The bottle seat is connected to the bottom of the bottle body. The bottle seat extends along the side of the bottle body and is provided with a first limiting buckle. The outer shell extends along the side of the bottle body and is provided with a second limiting buckle. The first limiting buckle and the second limiting buckle are engaged with each other. Under the action of the return spring, the pressed bottle cap is kept engaged with the bottle seat. When the return spring is compressed, the first limiting buckle and the second limiting buckle separate from each other, and the second limiting buckle of the outer shell slides relative to the bottle seat.

[0012] Furthermore, the outer surface of the valve ball spring is provided with a silver-plated antibacterial layer, and the longitudinal section of the residual plug is T-shaped.

[0013] Furthermore, the leak-proof drip head also includes a sealing cap, which is fitted onto the leak-proof drip head and seals the drip outlet.

[0014] The air-isolated metering dropper provided in this application, by incorporating a metering chamber and a leak-proof dropper within the dropper, ensures that the medication is not contaminated by external air during use and enables precise metered dispensing. The leak-proof dropper design effectively isolates air from the medication, ensuring the medication remains sterile during dispensing and preventing the intrusion of external microorganisms and dust. Compared to existing technologies, this application achieves more stable and reliable sealing performance, significantly improving the safety of the dropper and the effectiveness of the medication, meeting the high requirements for sterility and precise dispensing when providing medication to sensitive areas such as the eyes, ears, nose, and mouth. Attached Figure Description

[0015] The technical solution and other beneficial effects of this application will become apparent from the following detailed description of specific embodiments in conjunction with the accompanying drawings.

[0016] Figure 1 This is a schematic diagram of the structure of the air-isolated metering dropper provided in an embodiment of this application.

[0017] Figure 2 A cross-sectional view of the air-isolated metering dropper provided in an embodiment of this application.

[0018] Figure 3 This is a partial structural cross-sectional view of the air-isolated metering dropper provided in an embodiment of this application.

[0019] Figure 4 A cross-sectional view of the dropper provided in an embodiment of this application.

[0020] Figure 5 This is a diagram showing the combination of the dropper and piston cylinder provided in an embodiment of this application.

[0021] Figure 6 This is a schematic diagram of the piston cylinder provided in an embodiment of this application.

[0022] Figure 7 This is a schematic diagram of the structure of the rubber head provided in an embodiment of this application.

[0023] Figure 8 This is a schematic diagram of the structure of the valve ball controlling the flow of liquid in an embodiment of this application.

[0024] Figure 9 This is a schematic diagram of the structure when the valve ball controls the liquid flow channel to be cut off, as provided in the embodiment of this application.

[0025] The markings in the diagram are as follows: Air-isolated metering dropper 100, storage bottle 1, bottle body 11, raised connecting ring 111, bottle seat 12, first limiting buckle 121, second limiting buckle 122, dispensing head 2, core rod seat 21, guide cavity 211, guide channel 212, support plane 213, snap-fit ​​protrusion 214, snap-fit ​​protrusion 215, piston 22, sealing ring 23, sealing gasket 24, return spring 3, pressing bottle cap 4, metering cavity 41, outer shell 42, pressing plane 421, anti-slip rib 422, movable Stopper 43, annular base plate 431, spring fixing part 432, transition cavity 433, boss 434, flow groove 435, squeezing port 44, rubber head 45, outer circular platform 451, inner circular platform 452, inner circular ring rib 453, leak-proof drip head 5, drip nozzle 51, valve cavity 511, leak-proof cavity 512, drip port 513, groove 514, fixed base plate 515, hook 516, support boss 517, valve ball 52, valve ball spring 53, residual stopper 54, sealing cap 55. Detailed Implementation

[0026] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0027] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0028] like Figure 1 , Figure 2 , Figure 3 As shown in the figure, this application provides an air-isolated metering dropper 100, which includes a storage bottle 1, a dispensing head 2, a return spring 3, a pressure cap 4, and a leak-proof dropper 5. The dispensing head 2 is sealed to the mouth of the storage bottle 1. The return spring 3 is sleeved on the outside of the dispensing head 2. The pressure cap 4 is locked to the storage bottle 1. The pressure cap 4 presses the return spring 3 and seals the dispensing head 2. The pressure cap 4 has a metering cavity 41 corresponding to the dispensing head 2. The leak-proof dropper 5 is connected to the pressure cap 4 and communicates with the metering cavity 41.

[0029] like Figure 2 , Figure 3 , Figure 4 As shown, the leak-proof drip head 5 includes a drip tip 51, a valve ball 52, a valve ball spring 53, and a residual plug 54. The drip tip 51 is sealed and fitted onto the outside of the dispensing head 2. The drip tip 51 and the dispensing head 2 are mutually locked and fixed together inside the press-fit bottle cap 4. The press-fit bottle cap 4 has a squeezing port 44 corresponding to the dispensing head 2. Inside the drip tip 51, corresponding to the squeezing port 44, there are sequentially arranged a valve chamber 511, a leak-proof chamber 512, and a drip outlet 513. The inner walls of the valve chamber 511 and the leak-proof chamber 512 are provided with grooves 5. 14. The diameter of the leak-proof cavity 512 is smaller than the diameter of the valve cavity 511. The valve ball 52 is movably disposed in the valve cavity 511. The residual plug 54 is disposed in the leak-proof cavity 512. The valve ball spring 53 is sleeved on the outside of the residual plug 54 and disposed in the leak-proof cavity 512. The valve ball spring 53 and the valve ball 52 support each other to press the residual plug 54 into the leak-proof cavity 512. The leak-proof cavity 512 is connected to the drip port 513 through the groove 514 located on the outside of the residual plug 54.

[0030] like Figure 8 , Figure 9 As shown, when the pressure cap 4 is in a free state, the metering chamber 41 is filled with liquid medicine, and the valve bead 52 is located in the valve chamber 511 and is supported by the valve bead spring 53 to block the squeezing port 44; when the pressure cap 4 moves toward the storage bottle 1, the liquid medicine in the metering chamber 41 squeezes the valve bead 52 toward the valve bead spring 53 to form a temporary channel, and the liquid medicine is discharged from the drip port 513 through the groove 514.

[0031] This application, by incorporating a metering chamber 41 and a leak-proof dropper 5 within the dropper bottle, ensures that the medication is not contaminated by external air during use and enables precise metered dispensing. The leak-proof dropper 5 effectively isolates air from the medication, ensuring sterility during dispensing and preventing the intrusion of external microorganisms and dust. Compared to existing technologies, this application achieves more stable and reliable sealing performance, significantly improving the safety of the dropper bottle and the effectiveness of the medication, meeting the high requirements for sterility and precise dispensing when providing medication to sensitive areas such as the eyes, ears, nose, and mouth.

[0032] like Figure 2 , Figure 3 , Figure 5 , Figure 6As shown, the dispensing head 2 includes a core rod seat 21 and a piston 22. The core rod seat 21 is hollow and has a flow guiding cavity 211. The side wall of the core rod seat 21 has a flow guiding channel 212. The core rod seat 21 is sealed to the mouth of the storage bottle 1. The piston 22 is located at the end of the core rod seat 21. The constant volume of the metering chamber 41 controls the amount of medicine dispensed each time. The piston 22 can be movably extended into the metering chamber 41. The return spring 3 is sleeved on the outside of the core rod seat 21; the outside of the core rod seat 21 is provided with a support plane 213, and the end of the piston cylinder 43 away from the piston 22 forms an annular bottom plate 431. The annular bottom plate 431 is provided with a spring fixing part 432. The first end of the return spring 3 is supported on the support plane 213 of the core rod seat 21, and the second end of the return spring 3 is locked on the spring fixing part 432. The return spring 3 is supported between the core rod seat 21 and the piston cylinder 43. When the pressure cap 4 is in a free state, the return spring 3 opens the core rod seat 21 and the piston cylinder 43 so that the piston 22 is outside the metering chamber 41. The flow guide chamber 211, the flow guide channel 212, the flow guide chamber 211 and the metering chamber 41 are interconnected so that the metering chamber 41 is filled with liquid medicine. When the pressure cap 4 moves toward the storage bottle 1, the return spring 3 is compressed so that the distance between the core rod seat 21 and the piston cylinder 43 decreases and the piston 22 extends into the metering chamber 41.

[0033] The device incorporates a core rod seat 21 and a piston 22 structure within the liquid outlet head 2, with a return spring 3 externally mounted. This allows the metering chamber 41 to automatically fill with liquid in a free state and achieve metered extrusion under pressure. The return spring 3 ensures the piston 22 can quickly return to its original position, maintaining stable liquid replenishment and a sealed state. This effectively prevents air from entering while achieving metered liquid output, thus improving the device's sealing performance and metering accuracy.

[0034] Understandably, the dropper 51 and the dispensing head 2 are mutually locked and fixed inside the outer casing 42. When the pressure cap 4 is in a free state, the return spring 3 pushes the core rod seat 21 and the piston cylinder 43 apart, so that the piston 22 is outside the metering chamber 41. The guide chamber 211, the guide channel 212, the guide chamber 211 and the metering chamber 41 are interconnected. The medicine in the storage bottle 1 flows into the metering chamber 41 of the piston cylinder 43 through the flow channel 211, the guide channel 212 and the flow groove 435 at the position where the guide chamber 211 connects to the metering chamber 41. The metering chamber 41 is filled with medicine. The liquid is dispensed into the valve chamber 511, where the valve bead 52 is located and supported by the valve bead spring 53, which seals the dispensing port 44. When the pressure cap 4 moves toward the storage bottle 1, the return spring 3 is compressed, reducing the distance between the core rod seat 21 and the piston cylinder 43. The piston 22 seals the metering chamber 41 and extends into it. The piston 22 and piston cylinder 43 are pressurized together to squeeze the liquid in the metering chamber 41 into the leak-proof drip head 5. The liquid in the metering chamber 41 squeezes the valve bead 52 toward the valve bead spring 53 to form a temporary channel, allowing the liquid to be discharged from the drip port 513 through the groove 514.

[0035] like Figure 2 , Figure 3 As shown, the compression cap 4 includes a housing 42 and a piston cylinder 43. The housing 42 is locked to the liquid storage bottle 1. The piston cylinder 43 is fixed inside the housing 42. The piston cylinder 43 presses the return spring 3 and is sleeved on the outside of the core rod seat 21. The piston cylinder 43 has a metering chamber 41 inside and a squeezing port 44 corresponding to the metering chamber 41.

[0036] By designing the pressure cap 4 as a structure consisting of an outer shell 42 and a piston cylinder 43, the outer shell 42 is reliably locked and engaged with the liquid storage bottle 1. Simultaneously, the piston cylinder 43 is fixed inside the outer shell 42 and presses against the return spring 3, achieving a compact and reliable overall layout. The metering chamber 41 and the flow guiding chamber 211 inside the piston cylinder 43 work together, facilitating not only the flow and distribution of the liquid but also ensuring a stable output for each drop, thus improving ease of use and consistency.

[0037] like Figure 2 , Figure 3 , Figure 7As shown, the compression cap 4 also includes a rubber head 45, which is fixed to the end of the piston cylinder 43. The rubber head 45 connects the squeezing port 44 to the valve chamber 511. The rubber head 45 is provided corresponding to the valve chamber 511 and constitutes part of the structure of the valve chamber 511. The end of the rubber head 45 facing the piston cylinder 43 is provided with an outer circular platform 451 and an inner circular platform 452. The rubber head 45 is press-fitted with the inner side wall of the dropper 51 through the outer circular platform 451. The inner circular platform 452 is provided around the end of the piston cylinder 43. The inner edge of the rubber head 45 connecting to the valve chamber 511 is provided with an inner circular rib 453. The inner circular rib 453 cooperates with the valve ball 52 to control the flow and cut-off of the liquid channel.

[0038] In this design, a rubber nozzle 45 is added to the pressure cap 4, connecting it to the end of the piston cylinder 43 and forming part of the valve cavity 511. The interference fit between the rubber nozzle 45 and the dropper 51 improves the sealing strength and prevents leakage of the medicine. The inner annular rib 453 inside the rubber nozzle 45 works with the valve ball 52 to control the opening and closing of the liquid flow channel, ensuring that the medicine is output only under pressure, thus achieving the dual effects of leak prevention and quantitative control.

[0039] like Figure 6 As shown, the piston cylinder 43 is provided with a transition cavity 433 at the position corresponding to the core rod seat 21. The diameter of the transition cavity 433 is larger than the diameter of the metering cavity 41. The piston cylinder 43 is provided with a plurality of protrusions 434 at the position where the transition cavity 433 connects to the metering cavity 41. The gap between two protrusions 434 forms a flow channel 435. The protrusions 434 limit the swing gap of the piston 22. When an external force is applied to move the pressure cap 4 toward the storage bottle 1 to complete one drip, the external force is released and the pressure cap 4 moves away from the storage bottle 1 under the action of the return spring 3. The metering chamber 41 forms a closed negative pressure chamber. As the piston 22 continues to return to its original position, when the piston 22 passes through the flow channel 435, the metering chamber 41 is connected to the storage bottle 1 through the guide chamber 211, the guide channel 212, and the liquid storage bottle 1. Under the negative pressure of the metering chamber 41, the liquid in the storage bottle 1 is drawn into the metering chamber 41 to prepare for the next drip.

[0040] By setting multiple protrusions 434 at the connection between the flow guiding cavity 211 and the metering cavity 41, a flow channel 435 structure is formed. During the piston 22's reset process, a momentary connection path is formed through the flow channel 435, automatically drawing in the liquid when negative pressure is generated in the metering cavity 41. This design effectively prevents air from entering the metering cavity 41 and ensures rapid replenishment of the liquid, providing a reserve for the next dispensing, thereby improving the reusability and sealing reliability of the dispensing bottle.

[0041] Preferably, the outer side of the middle part of the core rod seat 21 is provided with a snap-fit ​​protrusion 215. When the piston 22 is fully extended into the metering chamber 41, the snap-fit ​​protrusion 215 snaps against the inner edge of the spring fixing part 432 to limit its position.

[0042] like Figure 2 , Figure 3 , Figure 7 , Figure 8 As shown, the core rod seat 21 is provided with at least one sealing ring 23 on the outer side of the middle part adjacent to the piston 22. The transition cavity 433 of the core rod seat 21 and the piston cylinder 43 are sealed together by the sealing ring 23. The inner side of the end of the core rod seat 21 away from the piston 22 is provided with a snap-fit ​​protrusion 214. The outer side of the bottle mouth of the liquid storage bottle 1 is provided with a protruding connecting ring 111. The core rod seat 21 and the bottle mouth of the liquid storage bottle 1 are snapped together by the snap-fit ​​protrusion 214 and the protruding connecting ring 111. A sealing gasket 24 is also provided between the core rod seat 21 and the bottle mouth of the liquid storage bottle 1.

[0043] The design incorporates a multi-layered sealing structure by installing a sealing ring 23 on the outer side of the core rod seat 21 near the piston 22, and by installing a snap-fit ​​protrusion 214 and a sealing gasket 24 between the core rod seat 21 and the mouth of the liquid storage bottle 1. This design effectively prevents leakage of the liquid under high pressure and blocks external air from entering the drip bottle from the mouth, further improving the sealing performance and long-term storage stability of the entire device.

[0044] like Figure 4 , Figure 5 As shown, the dropper 51 is provided with a fixing base 515 for fixing the annular base plate 431 of the piston 22. The fixing base 515 is provided with a plurality of supporting protrusions 517 corresponding to the annular base plate 431 of the piston 22. The fixing base 515 is provided with a plurality of hooks 516 corresponding to the edge of the annular base plate 431 of the piston 22. The plurality of hooks 516 form a ring to engage and limit the annular base plate 431.

[0045] The structure includes a fixed base 515 and annular hook 516 at the drip tip 51, which securely fixes the annular base plate 431 of the core rod seat 21, ensuring the stable assembly of the dispensing head 2 assembly. This structure not only prevents the dispensing head 2 from loosening or shifting during repeated squeezing, but also maintains the stability of the internal sealing state of the dripping bottle, thereby extending the product's service life and improving structural reliability.

[0046] like Figure 2As shown, the liquid storage bottle 1 includes a bottle body 11 and a bottle seat 12. The bottle seat 12 is connected to the bottom of the bottle body 11. The bottle seat 12 extends along the side of the bottle body 11 and is provided with a first limiting buckle 121. The outer shell 42 extends along the side of the bottle body 11 and is provided with a second limiting buckle 122. The first limiting buckle 121 and the second limiting buckle 122 are engaged with each other. Under the action of the return spring 3, the pressure cap 4 is kept engaged with the bottle seat 12. When the return spring 3 is compressed, the first limiting buckle 121 and the second limiting buckle 122 are separated from each other, and the second limiting buckle 122 of the outer shell 42 slides relative to the bottle seat 12.

[0047] The first limiting buckle 121 and the second limiting buckle 122 can be configured as annular to keep the outer shell 42 sliding relative to the bottle holder 12. Preferably, the bottle body 11 is provided with an inner liner to maintain the cleanliness of the medicine liquid inside the bottle body 11.

[0048] The liquid storage bottle 1 is designed to consist of a bottle body 11 and a bottle holder 12. A first limiting buckle 121 and a second limiting buckle 122 are provided between the bottle holder 12 and the outer casing 42, ensuring that the pressure cap 4 is reliably fixed under the action of the return spring 3. When external force is applied, the buckle structure can flexibly separate to achieve the pressing motion, and automatically reset after being released. This design makes the operation of the drip bottle smoother, while maintaining a good seal when not in use, preventing leakage or contamination of the liquid.

[0049] Furthermore, the outer surface of the valve ball spring 53 is provided with a silver-plated antibacterial layer, and the longitudinal section of the residual plug 54 is T-shaped. By providing a silver-plated antibacterial layer on the outer surface of the valve ball spring 53, bacterial growth is effectively inhibited, further ensuring the sterility and safety of the liquid medicine, and maintaining the cleanliness of the liquid medicine through antibacterial action; at the same time, the T-shaped structure design of the residual plug 54 improves its sealing and fitting effect within the leak-proof cavity 512, enhancing the leak-proof performance. This combined structure ensures the cleanliness and hygiene of the liquid medicine while preventing residual liquid leakage, thus improving the hygiene and reliability of the product.

[0050] Understandably, the outer casing 42 has a pressing surface 421 on the side opposite to the liquid storage bottle 1. The pressing surface 421 has anti-slip ribs 422, which include circular or zigzag ribs surrounding the liquid outlet head 2. The pressing surface 421 has multiple anti-slip ribs 422, which provide an anti-slip effect when pressed by the finger during use.

[0051] like Figure 2 As shown, the leak-proof drip head 5 also includes a sealing cap 55, which is fitted onto the leak-proof drip head 5 and seals the drip outlet 513.

[0052] Specifically, by adding a sealing cap 55 to the outside of the leak-proof drip tip 5, the drip outlet 513 is completely sealed when not in use. This design effectively prevents air, dust, or contaminants from entering the drip channel, while also preventing the liquid from evaporating or leaking during storage or transport, further enhancing the sealing protection capability of the drip bottle and the stability of the liquid's preservation.

[0053] The air-isolated metering dropper 100 provided in this application embodiment, by setting a metering chamber 41 and a leak-proof dropper 5 inside the dropper, ensures that the liquid medicine is not contaminated by external air during use and enables precise metering of the liquid medicine. The design of the leak-proof dropper 5 effectively isolates the contact between air and the liquid medicine, ensuring that the liquid medicine remains sterile during dripping and preventing the intrusion of external microorganisms and dust. Compared with the prior art, this application achieves more stable and reliable sealing performance, greatly improving the safety of the dropper bottle and the effectiveness of the liquid medicine, and meeting the high requirements for sterility and precise dripping when providing liquid medicine to sensitive areas such as the eyes, ears, nose, and mouth.

[0054] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0055] The above provides a detailed description of an air-isolated quantitative dropper provided in the embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An air-isolated metering dropper bottle, characterized in that, The air-isolated metering dropper includes a storage bottle, a dispensing head, a return spring, a pressure cap, and a leak-proof dropper. The dispensing head is sealed to the mouth of the storage bottle. The return spring is sleeved on the outside of the dispensing head. The pressure cap is engaged with the storage bottle and presses the return spring to seal the dispensing head. The pressure cap has a metering cavity corresponding to the dispensing head. The leak-proof dropper is connected to the pressure cap and communicates with the metering cavity. The leak-proof drip head includes a drip tip, a valve ball, a valve ball spring, and a residual plug. The drip tip is sealed and fitted outside the liquid outlet. The drip tip and the liquid outlet are mutually locked and fixed inside the press-fit cap. The press-fit cap has a squeezing port corresponding to the liquid outlet. Inside the drip tip, corresponding to the squeezing port, there are a valve chamber, a leak-proof chamber, and a drip outlet in sequence. The inner walls of the valve chamber and the leak-proof chamber have grooves. The diameter of the leak-proof chamber is smaller than the diameter of the valve chamber. The valve ball is movably disposed in the valve chamber. The residual plug is disposed in the leak-proof chamber. The valve ball spring is fitted outside the residual plug and disposed in the leak-proof chamber. The valve ball spring and the valve ball support each other to press the residual plug into the leak-proof chamber. The leak-proof chamber is connected to the drip outlet through the groove located outside the residual plug. When the press-fit cap is in a free state, the metering chamber is filled with liquid medicine, and the valve bead is located in the valve chamber and is supported by the valve bead spring to block the dispensing port; when the press-fit cap moves toward the storage bottle, the liquid medicine in the metering chamber squeezes the valve bead toward the valve bead spring side to form a temporary channel and discharges the liquid medicine through the groove from the dispensing port.

2. The air-isolated metering dropper as described in claim 1, characterized in that, The dispensing head includes a core rod seat and a piston. The core rod seat is hollow and has a flow guiding cavity. The side wall of the core rod seat has a flow guiding channel. The core rod seat is sealed to the mouth of the storage bottle. The piston is located at the end of the core rod seat. The constant volume of the metering chamber controls the amount of medicine dispensed each time. The piston can be movably extended into the metering chamber. The return spring is sleeved on the outside of the core rod seat; the outside of the core rod seat is provided with a support plane, and the end of the core rod seat away from the piston forms an annular base plate. The annular base plate is provided with a spring fixing part. The first end of the return spring is supported on the support plane of the core rod seat, and the second end of the return spring is locked on the spring fixing part. The return spring is supported between the core rod seat and the piston cylinder. When the pressure cap is in a free state, the return spring opens the core rod seat and the piston cylinder so that the piston is outside the metering chamber. The flow guiding chamber, the flow guiding channel, the flow guiding chamber and the metering chamber are interconnected so that the metering chamber is filled with liquid medicine. When the pressure cap moves toward the liquid storage bottle, the return spring is compressed, which reduces the distance between the core rod seat and the piston cylinder, and the piston extends into the metering chamber.

3. The air-isolated metering dropper as described in claim 2, characterized in that, The compression cap includes an outer shell and a piston cylinder. The outer shell is locked to the liquid storage bottle. The piston cylinder is fixed inside the outer shell. The piston cylinder presses against the return spring and is sleeved on the outside of the core rod seat. The piston cylinder has a metering chamber inside and a dispensing port corresponding to the metering chamber.

4. The air-isolated metering dropper as described in claim 3, characterized in that, The press-fit cap also includes a rubber head, which is fixed to the end of the piston cylinder. The rubber head connects the dispensing port to the valve cavity. The rubber head is positioned corresponding to the valve cavity and forms part of the valve cavity structure. The end of the rubber head facing the piston cylinder has an outer circular platform and an inner circular platform. The rubber head is interference-fitted with the inner wall of the dropper through the outer circular platform. The inner circular platform is arranged around the end of the piston cylinder. The inner edge of the rubber head connecting to the valve cavity has an inner circular rib. The inner circular rib cooperates with the valve ball to control the flow and cut-off of the liquid channel.

5. The air-isolated metering dropper as described in claim 3, characterized in that, The piston cylinder has a transition cavity at the position corresponding to the core rod seat. The diameter of the transition cavity is larger than the diameter of the metering cavity. The piston cylinder has multiple protrusions at the position where the transition cavity connects to the metering cavity. The gap between two protrusions forms a flow channel. The protrusions limit the swing clearance of the piston. When an external force is applied to move the pressure cap toward the storage bottle to complete one drip, the external force is released and the pressure cap moves away from the storage bottle under the action of the return spring. The metering chamber forms a closed negative pressure chamber. As the piston continues to return to its original position, when the piston passes through the flow channel, the metering chamber is connected to the storage bottle through the guide chamber, the guide channel and the storage bottle. Under the negative pressure of the metering chamber, the medicine in the storage bottle is drawn into the metering chamber for the next drip.

6. The air-isolated metering dropper as described in claim 5, characterized in that, At least one sealing ring is provided on the outer side of the core rod seat near the middle of the piston. The transition cavity of the core rod seat and the piston cylinder are sealed together by the sealing ring. A snap-fit ​​protrusion is provided on the inner side of the end of the core rod seat away from the piston. A protruding connecting ring is provided on the outer side of the bottle opening of the liquid storage bottle. The core rod seat and the bottle opening of the liquid storage bottle are snapped together by the snap-fit ​​protrusion and the protruding connecting ring. A sealing gasket is also provided between the core rod seat and the bottle opening of the liquid storage bottle.

7. The air-isolated metering dropper as described in claim 2, characterized in that, The dropper is provided with a fixing base for fixing the annular base plate of the piston. The fixing base is provided with multiple supporting protrusions corresponding to the annular base plate of the piston. The fixing base is provided with multiple hooks corresponding to the edge of the annular base plate of the piston. The multiple hooks form a ring to engage and limit the annular base plate.

8. The air-isolated metering dropper as described in claim 3, characterized in that, The liquid storage bottle includes a bottle body and a bottle seat. The bottle seat is connected to the bottom of the bottle body. The bottle seat extends along the side of the bottle body and is provided with a first limiting buckle. The outer shell extends along the side of the bottle body and is provided with a second limiting buckle. The first limiting buckle and the second limiting buckle are engaged with each other. Under the action of the return spring, the pressed bottle cap is kept engaged with the bottle seat. When the return spring is compressed, the first limiting buckle and the second limiting buckle are separated from each other, and the second limiting buckle of the outer shell slides relative to the bottle seat.

9. The air-isolated metering dropper as described in claim 1, characterized in that, The outer surface of the valve ball spring is provided with a silver-plated antibacterial layer, and the longitudinal section of the residual plug is T-shaped.

10. The air-isolated metering dropper as described in claim 1, characterized in that, The leak-proof drip head also includes a sealing cap, which is fitted onto the leak-proof drip head and seals the drip outlet.

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