Liquid drug sterile dispenser

Abstract

The present application belongs to the technical field of liquid delivery and distribution, and particularly relates to a sterile liquid medicine dispenser which solves the problem of contamination of liquid medicine in a container caused by backflow of the liquid medicine. The sterile liquid medicine dispenser comprises a pump body, the upper and lower ends of the pump body are respectively provided with a liquid outlet and a liquid inlet, a communication cavity is arranged between the liquid outlet and the liquid inlet, a container connecting structure is arranged on the pump body at the end of the liquid inlet, an isolation ring is arranged in the communication cavity and surrounds the liquid outlet, a valve core is arranged on the isolation ring for controlling communication or blocking of the liquid outlet and the liquid inlet, a first liquid storage chamber is formed between the valve core, the isolation ring and the pump body and communicates with the liquid outlet, a liquid channel in the shape of an inverted L is arranged on the valve core and communicates the liquid outlet and the liquid inlet, and a sealing structure is arranged between the isolation ring and the valve core and is used for communicating or blocking the liquid channel when the valve core is switched. The sterile liquid medicine dispenser prevents backflow of liquid medicine and ensures the effect of internal sterility.

Description

Technical Field

[0001] This invention belongs to the field of liquid dispensing technology, and specifically relates to a sterile dispensing device for pharmaceutical liquids. Background Technology

[0002] Commonly available eye drop formulations typically contain preservatives to prevent microbial contamination of sterile eye drops. However, studies have shown that preservatives can cause adverse side effects. Currently, to avoid the problems caused by preservatives, there are three main methods for maintaining the sterility of eye drops: First, sterile eye drops are provided in single doses. The disadvantage is that the dosage is uncontrollable; excessive drops not only hinder absorption but also waste the medication and may cause adverse reactions in the eyes and even the whole body, such as burning or stinging, high blood pressure, fatigue, and irregular heartbeat in glaucoma patients. Second, the method of maintaining sterility involves not adding preservatives but applying silver ions or a surface antibacterial coating to the dispensing device to sterilize the outflowing or backflowing medication. However, the disadvantage is that this type of device is expensive to manufacture. Third, the method of maintaining sterility involves using the anti-backflow function of the dispensing equipment and / or using air filtration elements to sterilize the air entering the device.

[0003] However, due to the overall structure of existing squeeze bottle-type eye drop devices, manual squeezing can easily cause problems such as liquid spraying and backflow of liquid after dripping, leading to contamination. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems in the prior art by proposing a sterile dispensing device for preventing backflow and spraying of the medicine.

[0005] To achieve the innovative purpose of this invention, the following technical solution can be used: A sterile liquid dispenser includes a pump body, with an outlet and an inlet respectively at the upper and lower ends of the pump body. A connecting cavity is provided between the outlet and the inlet. An isolation ring is provided in the connecting cavity surrounding the outlet. A valve core for controlling the connection or blockage between the outlet and the inlet is fitted on the isolation ring. A first liquid storage chamber connecting the outlet is formed between the valve core, the isolation ring, and the pump body. A liquid channel in an inverted L shape that connects the outlet and the inlet is provided through the valve core. A sealing structure is provided between the isolation ring and the valve core to connect or block the liquid channel when the valve core is switched.

[0006] The first reservoir slows down and concentrates the incoming liquid, helping it to be discharged as droplets from the outlet and preventing spraying. The sealing structure controls the opening and closing of the liquid channel. When the liquid channel is closed, the sealing structure prevents backflow, thus preventing the liquid in the first reservoir from flowing back and contaminating the liquid inside.

[0007] In the above-mentioned sterile drug dispenser, the liquid channel includes a liquid passage hole disposed on the side of the valve core and located between the isolation ring and the first liquid storage chamber. The valve core is also provided with a blind hole channel whose upper end is connected to the liquid passage hole, and the lower end of the blind hole channel is connected to the liquid inlet.

[0008] The valve core is provided with a liquid passage and a blind hole channel. This is equivalent to opening a through hole at the bottom of the valve core and opening a liquid passage on the upper side wall of the through hole. The liquid can flow in from the blind hole channel and flow out from the liquid passage to the first liquid storage chamber.

[0009] In the above-mentioned sterile drug dispenser, the sealing structure includes a first sealing lip and a second sealing lip disposed on the outer periphery of the valve core and located above and below the upper port of the liquid channel, respectively. The inner wall of the isolation ring consists of a straight cylindrical part and a flared part from bottom to top.

[0010] The first and second sealing lips are located on the upper and lower sides of the liquid passage hole, which can achieve a flow-blocking and sealing effect on the liquid flowing out of the liquid passage hole. The first sealing lip is located on the inner side of the horn section. When the valve core moves upward, the first sealing lip loses contact with the horn section and loses its sealing effect, allowing the liquid to flow into the first liquid storage chamber. When the valve core moves downward and resets, the first sealing lip is tightly attached to the inner wall of the horn section, forming a sealing effect and preventing the liquid from flowing back. The second sealing lip is always tightly attached to the straight section, maintaining a sealing effect when the valve core moves upward and resets.

[0011] In the above-mentioned sterile drug dispenser, the valve core includes a valve stem passing through an isolation ring, a valve wing at the bottom of the valve stem, an elastic reset component between the valve wing and the communicating cavity, a liquid passage at the side of the valve stem, and a blind hole channel at the bottom of the valve stem.

[0012] The valve core is a structure in which the valve stem is connected to the valve wing at the bottom. The valve stem passes through the isolation ring, and the blind hole channel is opened in the valve stem. The elastic reset component gives the valve stem a tendency to move downward and reset, so that the first sealing lip is more tightly pressed against the inner wall of the flared part, resulting in a better sealing effect.

[0013] In the aforementioned sterile drug dispenser, the valve wing is provided with a flexible, annularly protruding part, forming a second liquid storage chamber between the valve stem, the valve wing, and the liquid inlet.

[0014] The flexible part on the valve wing gives the valve wing a certain deformation capability, ensuring that the valve stem can move in a certain length direction. In addition, the flexible part protrudes upward, forming a second liquid storage chamber below it. When the liquid flows into the second liquid storage chamber, it has a certain speed-reducing effect, which helps the liquid to be finally output as droplets from the outlet.

[0015] In the above-mentioned sterile drug dispenser, the bottom opening of the pump body is provided with a cylindrical support member with an open bottom. The liquid inlet is provided at the center of the top of the support member. The valve wing is fixed between the pump body and the support member to form a seal. An air intake structure is provided between the support member and the pump body to allow external air to enter the inner cavity of the support member. The pump body is also provided with an air pressure balance hole to connect the connecting cavity with the outside.

[0016] The support is fixed at the bottom of the pump body and holds the outer periphery of the valve wing to the pump body. It has a positioning function for the valve core and an upward support function. The valve wing and the support are sealed to ensure the existence of the second liquid storage chamber. The air intake structure only allows air to enter and exit, so as to make up for the internal pressure difference after a certain amount of liquid is output, which helps the squeezed bottle to return to its original position. Of course, the air intake structure includes a filter unit, which can filter bacteria, impurities and germs in the air before inputting them. The air pressure balance hole is connected to the outside atmosphere to balance the internal and external air pressure difference. Outside air can enter the inner cavity through the air pressure balance hole and then through the air intake structure.

[0017] In the above-mentioned sterile drug dispenser, the support member and the pump body are connected by a first snap-fit ​​structure, and an interference fit sealing structure is also provided between the support member and the pump body.

[0018] The first snap-fit ​​structure limits the length of the support component, and the interference fit sealing structure ensures a good sealing effect.

[0019] In the aforementioned sterile drug dispenser, a container connection structure is provided on the pump body located at the inlet end.

[0020] The container connection structure specifically connects the container and the pump body by inserting a ring-shaped clip into the container slot, while the container anti-detachment clip and the external protrusion lock in place to form a limit.

[0021] In the above-mentioned sterile drug dispenser, the outlet is located on the cap, and the cap is connected to the pump body through a second snap-fit ​​structure or a screw-fit structure. The first liquid storage chamber is formed between the cap, the isolation ring, and the pump body.

[0022] The cap is snapped onto the opening of the isolation ring via a second snap-fit ​​structure, which has the effect of limiting and sealing. The liquid outlet is located on the cap, forming a first liquid storage chamber between the cap and the pump body. After the liquid flows into the first liquid storage chamber, it is output from the liquid outlet.

[0023] In the above-mentioned sterile drug dispenser, the outlet includes an inner opening and a right-angle flared structure, with a stop formed between the inner opening and the right-angle flared structure.

[0024] The right-angle flared structure forms a stop with the inner opening, which acts like a bowl and helps the liquid medicine to gather into drops before being output.

[0025] In the above-mentioned sterile drug dispenser, the valve stem end is provided with a radial groove for reducing the flow rate of the drug solution, and at least a portion of the outlet is connected to the radial groove.

[0026] Compared with existing technologies:

[0027] 1. This sterile medicine dispenser adopts a sealing structure of a first sealing lip and a second sealing lip. When the valve core is reset, the first sealing lip is in close contact with the flared part, which has a good sealing effect and prevents backflow, ensuring a sterile environment for the medicine in the inner cavity. When the valve core moves upward, the first sealing lip disengages from the flared part, ensuring the smooth flow of the medicine.

[0028] 2. This sterile dispensing device for medicine is equipped with a first and a second storage chamber, which has a good deceleration and buffering effect on the medicine, helping to avoid the problem of medicine spraying out.

[0029] 3. The outlet of this sterile medicine dispenser adopts a right-angle flared structure with an inner opening, forming a stop, which is equivalent to the function of a bowl, and helps the medicine to be collected into drops before being discharged. Attached Figure Description

[0030] Figure 1 This is an overall schematic diagram of the sterile dispensing device for medicine liquid of the present invention;

[0031] Figure 2 This is a front view schematic diagram of the sterile dispensing device for medicine of the present invention;

[0032] Figure 3 yes Figure 2 A schematic diagram of the cross-sectional structure at the BB position in the middle;

[0033] Figure 4 yes Figure 3 Enlarged detail of position A in the middle;

[0034] Figure 5 This is a partial structural diagram of the container connection structure and the position of the first snap-fit ​​structure of the sterile dispensing device for medicine liquid of the present invention;

[0035] Figure 6 This is a schematic diagram of the valve core of the sterile dispensing device for medicine liquid of the present invention.

[0036] In the diagram, the components are: pump body 1, isolation ring 11, connecting cavity 12, horn section 13, straight section 14, support member 15, liquid inlet 16, container connection structure 2, container slot 21, container anti-detachment clip 22, annular clip 23, external protrusion 24, valve core 3, liquid channel 31, liquid passage 32, blind hole channel 33, valve stem 34, valve wing 35, flexible part 36, radial groove 37, sealing structure 4, first sealing lip 41, second sealing lip 42, and elastic composite. Positioning component 5, reset spring 51, air inlet structure 6, air pressure balance hole 61, first snap-fit ​​structure 7, first convex ring 71, first groove 72, first anti-slip ring 73, interference fit sealing structure 74, interference fit protrusion 75, cap 8, liquid outlet 81, inner opening 82, right angle flared structure 83, second snap-fit ​​structure 85, second annular groove 86, second slot 87, second snap body 88, first liquid storage chamber 91, second liquid storage chamber 92, container 93. Detailed Implementation

[0037] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0038] Example 1

[0039] Specific implementation examples Figure 1-6 As shown, this sterile dispensing device includes a pump body 1. The pump body 1 has an outlet 81 and an inlet 16 at its upper and lower ends, respectively. A connecting cavity 12 is provided between the outlet 81 and the inlet 16. A container connection structure 2 is provided on the pump body 1 at one end of the inlet 16. An isolation ring 11 is provided in the connecting cavity 12 and surrounds the outlet 81. A valve core 3 is fitted on the isolation ring 11 to control the connection or blockage between the outlet 81 and the inlet 16. A first storage chamber 91 connecting the outlet 81 is formed between the valve core 3, the isolation ring 11 and the pump body 1. A liquid channel 31 in an inverted L shape is provided on the valve core 3 to connect the outlet 81 and the inlet 16. A sealing structure 4 is provided between the isolation ring 11 and the valve core 3 to connect or block the liquid channel 31 when the valve core 3 is switched.

[0040] Specifically, the first liquid storage chamber 91 can slow down and concentrate the incoming liquid medicine, which helps the liquid medicine to be output in droplets from the outlet 81 and avoids spraying. The sealing structure 4 can control the opening and closing of the liquid channel 31. When the sealing structure 4 closes the liquid channel 31, it plays a role in preventing backflow and preventing the liquid medicine in the first liquid storage chamber 91 from flowing back and contaminating the internal liquid medicine.

[0041] like Figure 3 , Figure 4 , Figure 6As shown, the liquid channel 31 includes a liquid passage 32 disposed on the side of the valve core 3 and located between the isolation ring 11 and the first liquid storage chamber 91. The valve core 3 is also provided with a blind hole channel 33 whose upper end is connected to the liquid passage 32, and whose lower end is connected to the liquid inlet 16.

[0042] Specifically, the valve core 3 is provided with a liquid passage 32 and a blind hole channel 33, which is equivalent to opening a through hole at the bottom of the valve core 3 and opening a liquid passage 32 on the upper side wall of the through hole. The liquid can flow in from the blind hole channel 33 and flow out from the liquid passage 32 into the first liquid storage chamber 91.

[0043] like Figure 3 , Figure 4 , Figure 6 As shown, the sealing structure 4 includes a first sealing lip 41 and a second sealing lip 42 disposed on the outer periphery of the valve core 3 and located above and below the upper port of the liquid channel 31, respectively. The inner wall of the isolation ring 11 consists of a straight cylindrical part 14 and a horn part 13 from bottom to top. The inner diameter of the horn part 13 gradually increases from bottom to top. The outer diameter of the first sealing lip 41 is larger than the outer diameter of the second sealing lip 42.

[0044] Specifically, the first sealing lip 41 and the second sealing lip 42 are provided on the upper and lower sides of the liquid passage 32, which can achieve the function of blocking and sealing the liquid flowing out of the liquid passage 32. The first sealing lip 41 is located inside the horn part 13. When the valve core 3 moves upward, the first sealing lip 41 loses contact with the horn part 13 and loses its sealing function, and the liquid can flow into the first liquid storage chamber 91. Since the inner diameter of the horn part 13 is larger at the top and smaller at the bottom, and the outer diameter of the first sealing lip 41 is within the range between the maximum and minimum inner diameter of the horn part 13, when the valve core 3 moves downward and resets, the first sealing lip 41 will be tightly attached to the inner wall of the horn part 13 to form a sealing effect and prevent the liquid from flowing back. The second sealing lip 42 is always tightly attached to the straight cylinder part 14, and always maintains the sealing effect when the valve core 3 moves upward and resets.

[0045] like Figure 4 , Figure 6 As shown, the valve core 3 includes a valve stem 34 passing through the isolation ring 11. A valve wing 35 is provided at the bottom of the valve stem 34. An elastic reset assembly 5 is provided between the valve wing 35 and the communicating cavity 12. The elastic reset assembly 5 includes a reset spring 51, one end of which is sleeved on the isolation ring 11 and abuts against the pump body 1, and the other end abuts against the valve wing 35 and the valve stem 34. A liquid passage hole 32 is provided on the side of the valve stem 34, and a blind hole channel 33 is provided at the bottom of the valve stem 34. A radial groove 37 for reducing the flow rate of the liquid is provided at the end of the valve stem 34. This radial groove 37 can cooperate with the liquid outlet 81, or at least a portion of the liquid outlet 81 can cooperate with the radial groove 37. A flexible annularly upward-protruding part 36 is provided on the valve wing 35, forming a second liquid storage chamber 92 between the valve stem 34, the valve wing 35, and the liquid inlet 16.

[0046] Specifically, the valve core 3 is a structure where the bottom of the valve stem 34 is connected to the valve wing 35. The valve stem 34 passes through the isolation ring 11, and the blind hole channel 33 is opened in the valve stem 34. The elastic reset component 5 gives the valve stem 34 a downward moving reset tendency, making the first sealing lip 41 fit more tightly against the inner wall of the horn part 13, resulting in a better sealing effect. In this embodiment, the elastic reset component 5 adopts a reset spring 51. One end of the reset spring 51 abuts against the pump body 1, and the other end abuts against the valve wing 35 and the valve stem 34. It is always in a compressed state and always applies a downward force to the valve core 3. The flexible part 36 on the valve wing 35 gives the valve wing 35 a certain deformation capability, ensuring that the valve stem 34 can move in a certain length direction. In addition, the flexible part 36 protrudes upward, forming a second liquid storage chamber 92 below it. When the liquid flows into the second liquid storage chamber 92, it has a certain deceleration effect on the liquid, which helps the liquid to be finally output as drops from the outlet 81.

[0047] The optimized radial groove 37 on the valve stem 34 provides a channel so that when the upper end of the valve stem 34 abuts against the cap 8, the liquid can flow from the radial groove 37 to the outlet 81 without affecting the liquid discharge.

[0048] Furthermore, regarding the specific structure of the flexible part 36, in this embodiment, the middle protrusion of the valve wing 35 and its outer side are designed to be flexible and made of rubber material, which meets the deformation requirements of the flexible part 36, allowing the valve stem 34 to rise and return to its original position; while the valve stem 34 and the inner ring of the valve wing 35 are made of hard material, ensuring that the valve core 3 can be better subjected to elastic force by the return spring 51 to maintain a good return trend.

[0049] like Figure 3 , Figure 5 As shown, a cylindrical support member 15 with an open bottom is provided on the bottom opening of the pump body 1. The support member 15 is connected to the pump body 1 through a first snap-fit ​​structure 7. An interference fit sealing structure 74 is also provided between the support member 15 and the pump body 1. The first snap-fit ​​structure 7 includes a first protruding ring 71 provided on the outer wall of the support member 15. A first groove 72 that can cooperate with the first protruding ring 71 is provided on the inner wall of the pump body 1. A first anti-slip ring 73 is provided below the first groove 72. An interference fit protrusion 75 that abuts against the inner wall of the pump body 1 is provided above the first protruding ring 71.

[0050] In addition, an inlet 16 is provided at the top center of the support member 15, and the valve wing 35 is fixed between the pump body 1 and the support member 15 to form a seal. An air intake structure 6 is provided between the support member 15 and the pump body 1 to allow external air to enter the inner cavity of the support member 15. The pump body 1 is also provided with an air pressure balance hole 61 to allow the connecting cavity 12 to communicate with the outside.

[0051] Specifically, the support member 15 is fixedly installed at the bottom of the pump body 1, and the outer periphery of the valve wing 35 is clamped onto the pump body 1. This means the outer periphery of the valve wing 35 is sandwiched between the pump body 1 and the support member 15, providing positioning and upward support for the valve core 3. The valve wing 35 and the support member 15 are sealed, ensuring the existence of the second liquid storage chamber 92. The air intake structure 6 only allows air to enter, while liquid medicine cannot pass through. This compensates for the internal pressure difference after a certain amount of liquid medicine is output, helping to reset the squeezed bottle. The air intake structure 6 includes a filter unit that filters bacteria and impurities from the air before inputting it. The pressure balance hole 61 connects to the outside atmosphere, balancing the internal and external pressure difference. Outside air can pass through the pressure balance hole 61 and then through the air intake structure 6 into the inner cavity. The first locking structure 7 limits the length of the support member 15. Specifically, the first protruding ring 71 of the support member 15 is engaged in the first groove 72 and abuts against the first anti-shifting ring 73 below for further limiting. The interference fit sealing structure 74 ensures a good sealing effect. Specifically, the interference fit protrusion 75 located on the inner wall of the pump body 1 is tightly clamped to the outer wall of the support member 15.

[0052] like Figure 3 , Figure 5 As shown, the container connection structure 2 includes a container slot 21 in the shape of an annular shape at the bottom of the pump body 1. The container slot 21 is provided with a container anti-detachment clip 22. The container bottle mouth is provided with an annular clip head 23 that can cooperate with the container slot 21. The annular clip head 23 is provided with an external protrusion 24 that can cooperate with the container anti-detachment clip 22.

[0053] In terms of optimization, the container connection structure 2 specifically connects the container 93 and the pump body 1 by inserting the annular clip 23 into the container slot 21. The container anti-detachment clip 22 and the external protrusion 24 lock in place to form a limit. This structure is easy to install and the connection effect is stable.

[0054] like Figure 1-4 , Figure 6 As shown, the liquid outlet 81 is located on the cap 8, which is connected to the pump body 1 via a second snap-fit ​​structure 85. A first liquid storage chamber 91 is formed between the cap 8, the isolation ring 11, and the pump body 1. The second snap-fit ​​structure 85 includes a second annular groove 86 located at the upper end of the pump body 1, a second slot 87 on the inner wall of the second annular groove 86, and a second snap body 88 on the cap 8 that can cooperate with the second slot 87. An easy-entry inclined surface is provided between the second snap body 88 and the second slot 87.

[0055] In terms of optimization, the cap 8 is secured to the opening of the isolation ring 11 by the second snap-fit ​​structure 85, which has the effect of limiting and sealing. The liquid outlet 81 is located on the cap 8, forming a first liquid storage chamber 91 between the cap 8 and the pump body 1. After the liquid flows into the first liquid storage chamber 91, it is output from the liquid outlet 81. As for the second connection structure, specifically, the second snap-fit ​​body 88 on the cap 8 is engaged in the second annular groove 86 and forms a snap-fit ​​with the second snap-fit ​​groove 87, which has the effect of limiting and sealing. The easy-entry slope helps the cap 8 to be fastened onto the pump body 1.

[0056] like Figure 4 As shown, the liquid outlet 81 includes an inner port 82 and a right-angle flared structure 83, with a stop formed between the inner port 82 and the right-angle flared structure 83.

[0057] In an optimized version, an inner opening 82 is provided on the cap 8, and a right-angle flared structure 83 with a larger inner diameter is provided outside the inner opening 82. In this embodiment, the right-angle flared structure 83 protrudes from the upper plane of the cap 8, forming a stop between the inner opening 82 and the right-angle flared structure 83, which forms a cavity to contain the medicine, equivalent to the function of a bowl. The medicine flows out from the inner opening 82 into the cavity of the stop, and when the medicine is sufficient, it can be output in drops, which has a very good drop-forming effect.

[0058] Specific working principle: In the static state, the return spring 51 pushes the valve body to make the first sealing lip 41 tightly adhere to the inner wall of the horn part 13, forming a seal. When the container 93 is squeezed, the liquid medicine is squeezed and enters the second storage chamber 92 through the liquid inlet 16. It is decelerated and buffered by collision in the first storage chamber 91. At this time, the valve stem 34 moves upward, so that the first sealing lip 41 is separated from the contact with the inner wall of the horn part 13. The liquid medicine flows from the liquid passage 32 to the first storage chamber 91. The liquid medicine is buffered and decelerated after colliding with the internal structure of the first storage chamber 91. Finally, the liquid medicine flows out from the liquid outlet 81. The liquid medicine first passes through the inner port 82 and is then temporarily contained in the cavity of the stop. When the amount of liquid medicine is sufficient, it is dropped and the output is completed.

[0059] Example 2

[0060] The working principle of this embodiment is basically the same as that of embodiment 1, except that the flexible part 36 is different.

[0061] Specific implementation examples Figure 1-6 As shown, the specific design is that only the middle protrusion of the valve wing 35 is made of elastic material. In this embodiment, the elastic material is TPE material, while the rest of the valve core 3 is made of hard material, which ensures that the valve stem 34 can rise and reset, while not affecting the sealing effect between the valve stem 34 and the isolation ring 11.

[0062] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A sterile dispensing device for liquid medicine, comprising a pump body (1), wherein the upper and lower ends of the pump body (1) are respectively provided with an outlet (81) and an inlet (16), and a communicating cavity (12) is provided between the outlet (81) and the inlet (16), characterized in that, The communicating cavity (12) is provided with an isolation ring (11) surrounding the liquid outlet (81). The isolation ring (11) is fitted with a valve core (3) for controlling the connection or blockage between the liquid outlet (81) and the liquid inlet (16). A first liquid storage chamber (91) connecting the liquid outlet (81) is formed between the valve core (3), the isolation ring (11) and the pump body (1). A liquid channel (31) in the shape of an inverted L is provided on the valve core (3) to connect the liquid outlet (81) and the liquid inlet (16). A sealing structure (4) is provided between the isolation ring (11) and the valve core (3) to connect or block the liquid channel (31) when the valve core (3) is switched. The liquid channel (31) includes a liquid passage (32) disposed on the side of the valve core (3) and located between the isolation ring (11) and the first liquid storage chamber (91). The valve core (3) is also provided with a blind hole channel (33) whose upper end is connected to the liquid passage (32). The lower end of the blind hole channel (33) is connected to the liquid inlet (16). The sealing structure (4) includes a first sealing lip (41) and a second sealing lip (42) disposed on the outer periphery of the valve core (3) and located above and below the upper port of the liquid channel (31), respectively. The inner wall of the isolation ring (11) consists of a straight cylindrical part (14) and a horn-shaped part (13) from bottom to top.

2. The aseptic dispensing device for pharmaceutical solutions according to claim 1, characterized in that, The valve core (3) includes a valve stem (34) passing through the isolation ring (11), a valve wing (35) at the bottom of the valve stem (34), an elastic reset component (5) between the valve wing (35) and the connecting cavity (12), a liquid passage (32) on the side of the valve stem (34), and a blind hole channel (33) at the bottom of the valve stem (34).

3. The aseptic dispensing device for pharmaceutical solutions according to claim 2, characterized in that, The valve wing (35) is provided with a flexible part (36) that protrudes upward in an annular shape, forming a second liquid storage chamber (92) between the valve stem (34), the valve wing (35) and the liquid inlet (16).

4. The aseptic dispensing device for pharmaceutical solutions according to claim 3, characterized in that, The pump body (1) has a cylindrical support member (15) with an open bottom at the bottom. The liquid inlet (16) is located at the center of the top of the support member (15). The valve wing (35) is fixed around the pump body (1) and the support member (15) to form a seal. An air intake structure (6) is provided between the support member (15) and the pump body (1) to allow external air to enter the inner cavity of the support member (15). The pump body (1) is also provided with a pressure balance hole (61) to allow the connecting cavity (12) to communicate with the outside. The support member (15) and the pump body (1) are connected by a first snap-fit ​​structure (7), and an interference fit sealing structure (74) is provided between the support member (15) and the pump body (1).

5. The sterile dispensing device for pharmaceutical solutions according to any one of claims 1-4, characterized in that, A container connection structure (2) is provided on the pump body (1) located at one end of the liquid inlet (16).

6. The aseptic dispensing device for pharmaceutical solutions according to any one of claims 1-4, characterized in that, The liquid outlet (81) is located on the cap (8), and the cap (8) is connected to the pump body (1) through the second snap-fit ​​structure (85) or the screw-fit structure. The first liquid storage chamber (91) is formed between the cap (8), the isolation ring (11) and the pump body (1).

7. The aseptic dispensing device for pharmaceutical solutions according to claim 6, characterized in that, The liquid outlet (81) includes an inner port (82), and the outer end of the inner port (82) is provided with a right-angle flared structure (83). The inner port (82) is connected to the right-angle flared structure (83).

8. The aseptic dispensing device for pharmaceutical solutions according to claim 2, characterized in that, The valve stem (34) has a radial groove (37) at its end for reducing the flow rate of the liquid medicine, and at least a portion of the outlet (81) is connected to the radial groove (37).

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