Bacteria-blocking liquid dropping device capable of realizing drop-by-drop distribution

Abstract

The dripping device comprises a container, an inner cover and an outer cover are arranged at an opening of the container, the inner cover is provided with a supporting body protruding upwards, a moving channel is reserved between the supporting body and a protective sleeve, a dripping valve vertical part capable of moving up and down is arranged to penetrate through the moving channel, the lower end of a dripping valve is fixed on the inner cover, and the outer cover is fixed on the outer cover. The top end of the drip tube covers the head of the support body; a liquid outlet channel is formed between the dropping valve and the inner cover and is disconnected or communicated with the dropping nozzle through vertical movement of the vertical part, a buffer groove is formed in the center of the head of the supporting body, a hollow elastic plug body extending into the buffer groove is formed at the lower end of the dropping nozzle, and the side wall of the plug body is in close contact with the side wall of the buffer groove to form sealing. A gap is reserved between the lower end face of the plug body and the bottom face of the buffer groove. The plug body can change the flow speed of liquid at the drip nozzle, so that drop-by-drop distribution is facilitated, and liquid injection is avoided; the hollow pipeline of the elastic plug body is deformed after being stressed, so that the inner end of the drip nozzle is narrowed, and liquid drops are more favorably formed.

Description

Technical Field

[0001] The present invention belongs to the technical field of pharmaceutical packaging materials, and particularly relates to a bacteriostatic dropper for dispensing drops by drops. Background Art

[0002] In daily life, a dropper is needed for precise drug administration, and the most common one is an eye drop dropper. After the dropper with a conventional structure finishes dropping the liquid, external air will be inhaled into the bottle body and come into contact with the liquid medicine in the bottle body. Moreover, the liquid medicine contacts the external air through the liquid outlet channel in the dropper for a long time, and bacteria in the air are likely to contaminate the liquid medicine. To solve this problem, preservatives, antioxidants or antibiotics and other drugs will be added to the liquid medicine during the production process to protect the liquid medicine. However, some liquid medicines are prone to react with these drugs such as preservatives, antioxidants or antibiotics added, and there are always certain risks in adding these drugs such as preservatives, antioxidants or antibiotics to the liquid medicine. Chinese Patent CN101998925B discloses a device for dispensing a predetermined dose of liquid, which includes a seal. The seal can be in a liquid release position to allow the liquid to flow out of the device, or in a check valve position to prevent the liquid from flowing back into the device. The seal includes a metering mechanism for the liquid to be dispensed, and the metering mechanism is a mechanism for forming liquid drops. The device includes a groove for the liquid to flow through, leading to the drop forming mechanism, and the drop forming mechanism includes a conical part that opens from the groove. The metering mechanism of this dropper is arranged at the head of the seal. After the liquid dropping is completed, with the closing of the seal, the liquid reflux is immediately blocked, and the liquid in the bottle body will not be contaminated, having the function of preventing bacteria. However, this seal is a planar seal, and a relatively large force for squeezing the bottle body is required to open the sealing surface. After the sealing surface is opened, the liquid directly leads to the dropper tip. If the force for squeezing the bottle body is slightly too large, the flow rate of the liquid medicine will be too fast, and it is easy to spray, and the liquid medicine is out of control, affecting the use effect.

[0003] In addition, in order to provide space for the seal to move upward and to install a return spring, there will be an inner cavity leading to the outside between the outer cover and the seal. When the bottle body is squeezed, the seal will move upward and squeeze the inner cavity, exhausting part of the air in the inner cavity. When the liquid dropping is completed and the seal moves downward to return, at this time, the inner cavity space increases, forming a negative pressure, and the air near the drop forming mechanism will be inhaled. At this time, there is a certain probability that there are formed but not yet separated liquid drops on the drop forming mechanism, and the suction force generated in the inner cavity will suck part of the liquid medicine constituting the liquid drop into the inner cavity. Once the liquid medicine is inhaled into the inner cavity, it will not only cause unnecessary waste, but also squeeze the liquid medicine contaminated in the inner cavity to the user during the next liquid dropping process, causing adverse effects, and thus failing to play the role of preventing bacteria. Summary of the Invention

[0004] The present invention aims to solve the problem of easy spraying of liquid medicine in the prior art, and provides a drop-by-drop antibacterial dropper, which adopts a structure in which a hollow plug body extends into a buffer tank, which is more conducive to drop-by-drop distribution of liquid medicine. In addition, it can also solve the problem of easy inhalation of residual liquid medicine between the outer cover and the drip valve in the prior art, and adopts a structure with a hole in the outer cover to prevent the inner cavity from inhaling liquid medicine, and even if liquid medicine is inhaled, it will not be squeezed toward the patient.

[0005] The anti-bacterial dropper for dropwise distribution comprises a container that is deformable under pressure, wherein an inner cover and an outer cover are arranged at the open portion of the container, and the inner cavity of the container is connected with the outside world through the inner cover air inlet and the outer cover air inlet in turn, the inner cover is provided with a support body protruding upward, and the outer cover is provided with a sheath around the support body, a moving passage is reserved between the support body and the sheath, a vertical portion of a dropper valve that can move up and down is arranged through the moving passage, the lower end of the dropper valve is fixed on the inner cover, the top end of the dropper valve covers the head of the support body and is provided with a dropper nozzle; a liquid outlet channel is formed between the dropper valve and the inner cover, one end of the liquid outlet channel is connected with the liquid storage cavity of the container through a connecting hole on the inner cover, and the other end is disconnected or connected with the dropper nozzle by the up and down movement of the vertical portion, a buffer groove is opened in the center of the head of the support body, and a hollow elastic plug body is formed at the lower end of the dropper nozzle, when the dropper nozzle is in a disconnected state, the plug body extends into the buffer groove, and the side wall of the plug body is in close contact with the side wall of the buffer groove to form a seal, and a gap is reserved between the lower end surface of the plug body and the bottom surface of the buffer groove. The side wall of the plug body extending into the buffer groove can change the direction of liquid flowing to the drip nozzle, changing the direct flow to the drip nozzle to the flow to the drip nozzle after buffering, thereby changing the flow rate of the liquid at the drip nozzle, which is conducive to drop-by-drop distribution and avoids liquid spraying; in addition, the hollow pipeline of the elastic plug body also constitutes a part of the drip nozzle, and will be deformed after being subjected to force, so that the inner end of the drip nozzle becomes narrower, which is more conducive to intercepting the liquid to form droplets, and when too much force is applied, the hollow pipeline will also be narrower, and droplets can still be effectively formed to prevent spraying; there is a gap between the plug body and the buffer groove, so that after the liquid collides with the buffer groove, part of the splashed liquid will be blocked back by the lower end face of the plug body, thereby further slowing down the flow rate of the liquid at the drip nozzle, further conducive to the formation of droplets and avoid liquid spraying.

[0006] Preferably, when the drip nozzle is in a disconnected state, the inner side of the top of the drip valve forms a seal with the head of the support body, and the side wall of the plug body forms a seal with the side wall of the buffer tank; when the drip nozzle is in a connected state, the inner side of the top of the drip valve moves upward, and the plug body moves upward accordingly and deforms under pressure, thereby releasing the seal formed between the top of the drip valve and the head of the support body. With such a structure, under normal conditions, the drip valve forms a seal with the support head, blocking the drip nozzle and sealing the liquid in the bottle; after squeezing the container, the drip valve will be pressed upward, releasing the seal, connecting the drip nozzle, and the liquid in the container will be discharged to the outside through the drip nozzle.

[0007] Preferably, the drip valve is made of elastic material and is an integrated structure, including a fixed seat fixed on the inner cover, a spring seat for installing a reset spring, a stretching portion connecting the spring seat and the fixed seat, a vertical portion protruding upward from the middle of the spring seat, a drip nozzle located at the top of the vertical portion, and a curved portion bent toward the head of the support body is provided at the top of the vertical portion; the buffer groove is wide outside and narrow inside, and the side wall of the plug body is tightly attached to the inner wall of the buffer groove by elastic force; the upper end of the reset spring is against the inner side of the outer cover, and the lower end is against the spring seat. In this way, the drip valve has a simple structure, can be integrally formed, and is easy to process. The buffer groove is wide outside and narrow inside, allowing the plug body to easily extend into it to form an effective seal. Structures such as the reset spring can ensure that the seal between the drip valve and the support body can smoothly switch between the blocking and connecting states.

[0008] Preferably, the inner side of the curved portion has an inclined sealing surface, and the sealing surface forms a line seal with the peripheral contour line of the support body head. In this way, only a small squeezing force is required to open it for liquid to flow through, which is more convenient to use.

[0009] Preferably, the spring seat is provided with a baffle, and a lower mounting groove for placing the lower end of the return spring is formed between the baffle and the vertical portion. In this way, the return spring can be ensured to be installed in place and will not be easily displaced.

[0010] Preferably, an inner cavity connected to the moving channel is formed between the outer cover and the drip valve, and a through hole leading from the inner cavity to the outside is formed in the outer cover. In this way, when the squeeze on the container is released, the drip valve is reset, and the inner cavity forms a negative pressure, gas is first added from the through hole to release the negative pressure state, so that suction will not be formed near the drip nozzle, and droplets that have been formed but not yet dripped will not be sucked in, thereby minimizing the occurrence of droplets sucked into the inner cavity. Even if a small amount of liquid remains in the moving channel or the inner cavity due to improper operation, when the bottle body is squeezed, the pressurized gas generated in the inner cavity will first be discharged from the through hole, thereby releasing the high-pressure state of the inner cavity, so that the residual liquid will not be squeezed out of the moving channel, avoiding the contaminated liquid medicine from being squeezed toward the patient. In addition, when placed normally, the residual liquid can also evaporate slowly from the through hole.

[0011] Preferably, the through hole is vertically arranged, and its bottom inlet is opened at the bottom of the inner cavity, facing the stretching part. When the container is squeezed, the stretching part is deformed to the maximum and has a greater upward displacement. The through hole faces the stretching part, which can ensure that the pressurized gas is discharged from the through hole first. The vertically arranged through hole can make the pressurized gas discharge more directly and quickly.

[0012] Preferably, the outer cover forms an upper mounting groove around the sheath, and the upper end of the reset spring is located in the upper mounting groove; the bottom inlet of the through hole is located below the upper mounting groove. Even if residual liquid flows into the inner cavity, when the dropper is used upside down, the residual liquid will be in the upper mounting groove, which ensures that the inner end of the through hole will not be blocked by the residual liquid. In addition, the residual liquid in the upper mounting groove is more difficult to be squeezed out of the inner cavity. Preferably, the outer cover is provided with an extrusion part, the fixing seat of the liquid dropping valve is fixed between the extrusion part and the inner cover, the extrusion part and the upper end of the sheath are connected together through an inclined shoulder; the through hole is opened in the shoulder. In this way, it can be ensured that the outer end outlet of the through hole is lower than the outlet of the liquid transfer channel, so that the discharge path of the through hole is shorter than that of the liquid transfer channel, thereby ensuring that the compressed gas in the inner cavity is preferentially discharged from the through hole.

[0013] Preferably, there are two through holes, which are symmetrically distributed on the outer cover with the drip nozzle as the center. The two through holes can form a convection, which can accelerate the volatilization of the residual liquid that accidentally flows into the inner cavity.

[0014] The bacteriostatic liquid dropper for drop-by-drop dispensing provided by the present invention has at least the following advantages: 1. The present invention is provided with a hollow plug body extending into the buffer groove, and the hollow pipe of the plug body forms a part of the drip nozzle. When the liquid dropping valve is opened, the fluid will deform the plug body under pressure, thereby reducing the liquid passing amount at the inner end of the drip nozzle, ensuring that liquid droplets can be formed, guaranteeing drop-by-drop dispensing, and avoiding the occurrence of spraying phenomenon. The greater the extrusion force, the greater the deformation of the plug body, and liquid droplets can still be formed. Therefore, within a large range of extrusion forces, the liquid dropper can dispense drop by drop, making it more convenient to use and simpler to operate.

[0015] 2. The hollow plug body extending into the buffer groove changes the flow direction of the fluid, making it first flow to the bottom surface of the buffer groove and then fold back to flow towards the drip nozzle. At the same time, the bottom surface of the plug body blocks back part of the fluid, greatly reducing the flow rate and avoiding the occurrence of spraying phenomenon during liquid dropping, ensuring the drop-by-drop dispensing of the liquid dropper. 3. At the end of liquid dropping, the through hole structure avoids the generation of negative pressure in the inner cavity and sucking in excess liquid droplets, causing pollution to the liquid dropper.

[0016] 4. Even if there is residual liquid in the inner cavity, the through hole can ensure that the residual liquid will not be squeezed towards the patient. In addition, the through hole also provides a volatilization channel, allowing the residual liquid to dry naturally. Description of the Drawings

[0017] Figure 1 is a three-dimensional structure schematic diagram of the present invention; Figure 2 is a half-sectional three-dimensional structure schematic diagram of the present invention; Figure 3 is an exploded decomposition structure schematic diagram of the present invention; Figure 4 is a half-sectional structure schematic diagram of the present invention removing the protective cover and the container; Figure 5 is a half-sectional structure schematic diagram of the drip nozzle of the present invention when it is inverted and ready for liquid dropping; Figure 6 is a half-sectional structure schematic diagram of the drip nozzle of the present invention when it is inverted for liquid dropping; Figure 7Schematic three-dimensional structure diagram of the dropping valve of the present invention; Figure 8 Schematic half-sectional three-dimensional structure diagram of the dropping valve of the present invention; Figure 9 Schematic three-dimensional structure diagram of the inner cover of the present invention; Figure 10 Schematic three-dimensional structure diagram of the outer cover of the present invention; Figure 11 Schematic three-dimensional structure diagram of the duckbill valve of the present invention.

[0018] Description of reference numerals: Container 1, inner cover 2, support body 21, communication hole 22, liquid outlet channel 23, buffer groove 24, inner cover air inlet channel 25, dropping valve 3, fixed seat 31, stretching part 32, spring seat 33, enclosure 34, lower installation groove 35, vertical part 36, plug body 37, drip nozzle 38, bending part 39, outer cover 4, through hole 41, extrusion part 42, shoulder 43, sheath 44, moving channel 45, inner cavity 46, upper installation groove 47, outer cover air inlet channel 48, return spring 5, protective cover 6, volatilization hole 61, liquid absorption cotton 7, ventilation hole 71, antibacterial hydrophobic breathable membrane 8, duckbill valve 9, diaphragm 91, through slit 92. Detailed implementation manners

[0019] The following specific embodiments illustrate the implementation manners of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0020] It should be noted that the structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in the art to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention. Therefore, they do not have any technical essence. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope that can be covered by the technical content disclosed in the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" cited in this specification are only for the convenience of clear narration, rather than used to limit the scope of implementation of the present invention. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope that the present invention can implement.

[0021] For the convenience of narration, Figure 5 、 Figure 6 Except for the introduction of Figure 4 When the container mouth of the present invention is placed upward, the "upper", "lower", "top" and "bottom" in the present invention are all based on this, that is, Figure 4 The orientation of the product of the present invention shown is used as the reference.

[0022] Such as Figure 1, Figure 2 , Figure 3 As shown in Figure 3 and , a bacteriostatic dropper for drop-by-drop dispensing provided by the present invention includes a deformable container 1 under pressure. The container 1 is a bottle-shaped structure made of elastic plastic material, which will deform after being squeezed to reduce the volume inside the bottle, so as to squeeze the liquid such as eye drops stored in the bottle towards the dropper nozzle 38. An inner cap 2 and an outer cap 4 are provided at the open end of the container 1. A dropper valve 3 approximately in a conical shape made of elastic material is provided between the inner cap 2 and the outer cap 4, and a return spring 5 is installed on the dropper valve 3. A protective cover 6 is provided on the outer sides of the inner cap 2 and the outer cap 4. The protective cover 6 is provided with a volatilization hole 61 to facilitate the volatilization of the liquid remaining at the dropper nozzle 38, keep the inside of the bottle dry, and prevent contamination of the newly extruded liquid drops during the next use. A liquid-absorbing cotton 7 located above the dropper nozzle 38 is provided inside the protective cover 6, and the liquid-absorbing cotton 7 is provided with a ventilation hole 71. The inner cavity of the container 1 is communicated with the outside through an inner cap air inlet passage 25 and an outer cap air inlet passage 48 in sequence. After squeezing the liquid in the container 1 towards the dropper nozzle 38, the outside can compensate the gas into the container 1 through the inner cap air inlet passage 25 and the outer cap air inlet passage 48, so as to use the air pressure to push the liquid towards the dropper nozzle 38. After the squeezing is over, the supplemented gas is beneficial for the container 1 to return to its original state. The inner cap air inlet passage 25 is provided with a bacteriostatic hydrophobic breathable membrane 8, and a duckbill valve 9 is provided at the inner end of the inner cap air inlet passage 25. The bacteriostatic hydrophobic breathable membrane 8 can let air in, but the liquid in the container 1 cannot flow out, ensuring the use effect. The duckbill valve 9 will only open when air enters, further ensuring that the liquid in the container 1 will not flow out.

[0023] As Figure 7 , Figure 8 As shown in Figure 7 and Figure 8 , the dropper valve 3 is made of elastic material and is an integral structure, including a fixed seat 31 fixed on the inner cap 2, a spring seat 33 for installing the return spring 5, a stretching part 32 connecting the spring seat 33 and the fixed seat 31, and a vertical part 36 passing through the moving channel 45. The dropper nozzle 38 is located at the top of the vertical part 36, and a bending part 39 bending towards the head of the support body 21 is provided at the top of the vertical part 36. An inclined sealing surface 391 is provided inside the bending part 39. The spring seat 33 is provided with a retaining wall 34, and a lower installation groove 35 for placing the lower end of the return spring 5 is formed between the retaining wall 34 and the vertical part 36.

[0024] As Figure 9 As shown in Figure 9 , the inner cap 2 is provided with an upward protruding support body 21, and a buffer groove 24 is opened at the top of the support body 21. A communication hole 22 is opened on the upper surface of the inner cap 2, and an inner cap air inlet passage 25 leading directly to the inside is opened on the side surface.

[0025] As Figure 10 As shown in Figure 10 , the outer cap 4 is provided with an extrusion part 42, and the extrusion part 42 and the upper end of the sheath 44 are connected together through an inclined shoulder part 43; a through hole 41 is opened in the shoulder part 43. An outer cap air inlet passage 48 leading directly to the inside is opened on the side surface of the outer cap 4.

[0026] AsFigure 11 As shown, the duckbill valve 9 has two elastically curved diaphragms 91 that bend towards each other. The bottom ends of the two diaphragms 91 are joined together with a through slit 92 left there.

[0027] As Figure 4 shown, the outer cover 4 is provided with a sheath 44 around the support body 21. A moving channel 45 is left between the support body 21 and the sheath 44. The vertical part 36 of the dropper valve 3 that can move up and down passes through the moving channel 45. The fixing seat 31 at the lower end of the dropper valve 3 is clamped and fixed by the pressing parts 42 of the inner cover 2 and the outer cover 4. The top end of the vertical part 36 of the dropper valve 3 covers the head of the support body 21. The sealing surface 391 and the outer peripheral contour line of the head of the support body 21 form a line seal. Compared with a surface seal, the line seal can be opened with a smaller pressing force at this place. The dropper nozzle 38 is formed by the opening at the top end of the vertical part 36. The solid part at the top end of the vertical part 36 constitutes the dropper nozzle seat. The dropper nozzle 38 is composed of a wedge-shaped groove in the upper part and a vertical through hole in the lower part, which is more conducive to forming liquid drops. A liquid outlet channel 23 is formed between the dropper valve 3 and the inner cover 2. One end of the liquid outlet channel 23 communicates with the liquid storage cavity of the container 1 through the communication hole 22 on the inner cover 2, and the other end is disconnected or communicated with the dropper nozzle 38 by the up and down movement of the vertical part 36. A hollow elastic plug body 37 is formed at the lower end of the dropper nozzle 38. The hollow cavity constitutes a part of the vertical through hole in the lower part of the dropper nozzle 38. When the dropper nozzle 38 is in the disconnected state, the plug body 37 extends into the buffer groove 24, and the side wall of the plug body 37 is in close contact with the side wall of the buffer groove 24 to form a seal. The buffer groove 24 is wider outside and narrower inside. The side wall of the plug body 37 is tightly attached to the inner wall of the buffer groove 24 by elastic force. A gap is left between the lower end surface of the plug body 37 and the bottom surface of the buffer groove 24. When the dropper nozzle 38 is in the connected state, the inner side of the top end of the dropper valve 3 moves up, and the plug body 37 moves up accordingly and is compressed and deformed, thereby releasing the seal formed between the top end of the dropper valve 3 and the head of the support body 21. The upper end of the return spring 5 abuts against the inner side of the outer cover 4, and the lower end abuts against the spring seat 33, so as to reset the dropper valve 3.

[0028] An inner cavity 46 communicating with the moving channel 45 is formed between the outer cover 4 and the dropper valve 3. The outer cover 4 is provided with a through hole 41 leading to the outside from the inner cavity 46. The through hole 41 is vertically arranged, and the bottom end inlet thereof is opened at the bottom end of the inner cavity 46, facing the stretching part 32. The outer cover 4 forms an upper mounting groove 47 around the sheath 44. The upper end of the return spring 5 is located in the upper mounting groove 47; the bottom end inlet of the through hole 41 is located below the upper mounting groove 47. There are two through holes 41, and they are symmetrically distributed on the outer cover 4 with the dropper nozzle 38 as the center.

[0029] As Figure 5 、 Figure 6 shown, when the dropper of the present invention is in use, the protective cover 6 needs to be removed and it is used in an inverted manner, that is, the dropper nozzle 38 is facing downwards (here, downwards is based on the Figure 6 shown direction). As Figure 6As shown, after squeezing the container 1, the liquid in the container 1 flows from the communication hole 22 to the liquid outlet channel 23, thereby pushing the dropper valve 3 to move downward against the resistance of the return spring 5, opening the seal between the dropper valve 3 and the head of the support body 21. The liquid first flows upward to the bottom surface of the buffer tank 24 and then turns back to form droplets and drip from the dropper nozzle 38. The plug body 37 extending into the buffer tank 24 changes the flow direction of the liquid, reduces the flow rate, is conducive to forming droplets, and avoids the occurrence of spraying phenomena. At the same time, the hollow plug body 37 will deform under pressure, reducing the volume of the fluid channel, which is more conducive to the liquid below to form droplets and separate from the liquid main body, facilitating drop-by-drop dispensing and avoiding spraying.

[0030] As Figure 6 shown by the dotted arrow in the figure, the droplets generated by the original dropper will be sucked into the moving channel 45 and the inner cavity 46 along the direction shown by the dotted arrow. When the squeezing of the container 1 stops and the container 1 is released before the droplets are formed and dropped, a suction force will be generated in the inner cavity 46 of the original dropper to suck the droplets. In addition, if the container 1 is placed upright instead of inverted at this time, the droplets are also very likely to enter the moving channel 45.

[0031] Since the device of the present invention is more conducive to the formation of droplets, the probability of the undropped droplets entering the moving channel 45 and the inner cavity 46 is increased. As a result, it is possible that during the next use, the contaminated droplets in the moving channel 45 and the inner cavity 46 will be squeezed towards the patient, causing adverse effects. The setting of the through hole 41 effectively solves this problem. When the container 1 is squeezed, the gas in the inner cavity 46 will first be discharged from the through hole 41, and the contaminated liquid that has strayed into the inner cavity 46 will not be squeezed towards the patient. In addition, the through hole 41 ensures that the air pressure in the inner cavity 46 is the same as that of the outside world, and also avoids the formation of negative pressure and suction force in the inner cavity 46 at the end of squeezing the bottle body, so that no suction force is generated on the droplets at the dropper nozzle 38, reducing the probability of droplets straying into the inner cavity 46. In addition, the symmetrically arranged through holes 41 can form a convection to dry the droplets that have strayed into the inner cavity 46.

[0032] The structure of the present invention is simple and reasonable, with good use effects, and is conducive to promotion.

[0033] The above embodiments are only illustrative of the principles and effects of the present invention, and are not used to limit the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A bacteria-blocking dropper for dropwise dispensing, comprising a deformable container (1) that can be pressed, an inner lid (2) and an outer lid (4) are provided at the open end of the container (1). The inner cavity of the container (1) is communicated with the outside through an inner lid air inlet channel (25) and an outer lid air inlet channel (48) in sequence. The inner lid (2) is provided with a support body (21) protruding upward. The outer lid (4) is provided with a sheath (44) around the support body (21). A moving channel (45) is left between the support body (21) and the sheath (44). A vertical part (36) of a dropper valve (3) that can move up and down is arranged through the moving channel (45). The lower end of the dropper valve (3) is fixed on the inner lid (2), and its top covers the head of the support body (21) and is provided with a dropper nozzle (38). An outlet channel (23) is formed between the dropper valve (3) and the inner lid (2). One end of the outlet channel (23) is communicated with the liquid storage cavity of the container (1) through a communication hole (22) on the inner lid (2), and the other end is disconnected or communicated with the dropper nozzle (38) through the up and down movement of the vertical part (36). It is characterized in that, A buffer groove (24) is formed at the center of the head of the support body (21). The lower end of the drip nozzle (38) forms a hollow elastic plug body (37). When the drip nozzle (38) is in the disconnected state, the plug body (37) extends into the buffer groove (24), and the side wall of the plug body (37) is in close contact with the side wall of the buffer groove (24) to form a seal, and there is a gap between the lower end surface of the plug body (37) and the bottom surface of the buffer groove (24).

2. The antibacterial dropper for dropwise dispensing according to claim 1, characterized in that, When the drip nozzle (38) is in the disconnected state, the inner side of the top end of the drip valve (3) forms a seal with the head of the support body (21), and the side wall of the plug body (37) forms a seal with the side wall of the buffer groove (24); when the drip nozzle (38) is in the connected state, the inner side of the top end of the drip valve (3) moves upward, and the plug body (37) moves upward and is compressed and deformed accordingly, so as to release the seal formed between the top end of the drip valve (3) and the head of the support body (21).

3. The antibacterial dropper for dropwise dispensing according to claim 1, characterized in that, The drip valve (3) is made of an elastic material and is of an integral structure, and includes a fixed seat (31) fixed on the inner cover (2), a spring seat (33) for installing a return spring (5), and a stretching part (32) connecting the spring seat (33) and the fixed seat (31). The vertical part (36) protrudes upward from the middle of the spring seat (33). The drip nozzle (38) is located at the top end of the vertical part (36), and a bending part (39) bent toward the head of the support body (21) is provided at the top end of the vertical part (36); the buffer groove (24) is wider outside and narrower inside, and the side wall of the plug body (37) is tightly attached to the inner wall of the buffer groove (24) by elastic force; the upper end of the return spring (5) abuts against the inner side of the outer cover (4), and the lower end abuts against the spring seat (33).

4. The bacteriostatic dropper for dropwise dispensing according to claim 3, wherein An inclined sealing surface (391) is provided inside the bending part (39), and the sealing surface (391) forms a line seal with the outer peripheral contour line of the head of the support body (21).

5. The bacteriostatic dropper for dropwise dispensing according to claim 3, characterized in that, A retaining wall (34) is provided on the spring seat (33), and a lower installation groove (35) for placing the lower end of the return spring (5) is formed between the retaining wall (34) and the vertical part (36).

6. The bacteriostatic dropper for dropwise dispensing according to claim 3, characterized in that, An inner cavity (46) communicating with the moving channel (45) is formed between the outer cover (4) and the drip valve (3), and a through hole (41) leading to the outside is opened on the outer cover (4) from the inner cavity (46).

7. The droplet dispenser for preventing bacteria from spreading by droplet-by-droplet dispensing according to claim 6, characterized in that, The through hole (41) is vertically arranged, and the bottom end inlet thereof is opened at the bottom end of the inner cavity (46) and is opposite to the stretching part (32).

8. The bacteriostatic dropper for drop-by-drop dispensing according to claim 7, wherein The outer cover (4) forms an upper installation groove (47) around the sheath (44), and the upper end of the return spring (5) is located in the upper installation groove (47); the bottom end inlet of the through hole (41) is located below the upper installation groove (47).

9. The bacteriostatic dropper for dropwise dispensing according to claim 7, characterized in that, An extrusion part (42) is provided on the outer cover (4), the fixed seat (31) of the drip valve (3) is fixed between the extrusion part (42) and the inner cover (2), and the extrusion part (42) and the upper end of the sheath (44) are connected together through an inclined shoulder (43); the through hole (41) is opened on the shoulder (43).

10. The anti-bacterial dropper for drop-by-drop dispensing according to claim 6, characterized in that, There are two through holes (41), and they are symmetrically distributed on the outer cover (4) with the drip nozzle (38) as the center.

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