Segmented unidirectional ocular drop assembly

Abstract

The application discloses a segmented one-way check eye drop combination device, and relates to the field of medical devices.The device comprises a bottle body, a Tesla valve and a bottle cap.The liquid inlet end of the Tesla valve is fixedly connected with the open end of the bottle body.The Tesla valve comprises a plurality of Tesla valve units.At least one Tesla valve unit serves as a Tesla valve base and is fixedly connected with the bottle body.The remaining Tesla valve units are sequentially and circularly connected with the liquid outlet end of the Tesla valve base except the Tesla valve unit serving as the Tesla valve base.The bottle cap is connected with the liquid outlet end of the Tesla valve unit at the end of the liquid outlet direction.The Tesla valve base and the adjacent Tesla valve units, the remaining Tesla valve units except the Tesla valve base, and the Tesla valve unit at the end of the liquid outlet direction and the bottle cap are integrally connected through thin-wall connecting parts into a whole structure which can be broken in sequence.The application can avoid cross contamination of the eye drops during use and ensure the sterility of the liquid medicine used each time.

Description

Technical Field

[0001] This invention relates to the field of medical devices, and more particularly to a segmented one-way anti-retrograde eye drop combination device. Background Technology

[0002] Eye drops are one of the most commonly used dosage forms for the treatment of ophthalmic diseases and daily eye care, playing an important role in clinical and home medication use. Currently, the vast majority of eye drops on the market use single-bottle, multi-dose packaging, meaning each bottle of eye drops is equipped with a fixed dispensing spout, allowing patients to use it repeatedly over a period of time. This traditional packaging method is simple in structure, inexpensive, and easy to carry. Patients only need to open the cap and squeeze the bottle to complete the instillation, making it very easy to use and long the mainstream solution for eye drop packaging.

[0003] However, this seemingly convenient traditional eye drop bottle reveals a significant hygiene and safety hazard in actual use. Each time a patient instills medication, the dispensing nozzle inevitably comes into contact with the eyelid, eyelashes, or skin around the eye. Microorganisms adhering to the dispensing nozzle, along with residual medication, create a breeding ground for bacteria at the bottle opening. When the bottle is returned to its original state, external air, along with these microorganisms, may be drawn back into the bottle, contaminating the entire solution. For ophthalmic medications that require long-term, frequent use, this risk of contamination accumulates with each use, potentially affecting efficacy or even causing secondary eye infections, posing a threat to the patient's eye health.

[0004] To address this issue, some eye drop products add preservatives to their formulas to inhibit the growth of microorganisms at the bottle opening and inside the bottle. However, the addition of preservatives itself brings new problems. Long-term use of eye drops containing preservatives may damage corneal epithelial cells, worsen dry eye symptoms, and even cause drug-induced keratitis. Especially for patients with chronic eye diseases requiring lifelong medication and postoperative patients whose corneal tissue is already fragile, the cumulative toxicity of preservatives is an unavoidable clinical challenge. Therefore, some preservative-free, single-dose, disposable eye drops have appeared on the market. However, these products are usually packaged and used individually, which easily leads to waste and higher usage costs.

[0005] Therefore, how to develop a segmented, one-way anti-retrograde eye drop combination device that can avoid cross-contamination of eye drops during use, ensure sterility of the solution used each time, and at the same time take into account ease of use and cost controllability has become a technical problem that urgently needs to be solved by people in this field. Summary of the Invention

[0006] The purpose of this invention is to provide a segmented, one-way anti-retrograde eye drop combination device that can avoid cross-contamination of eye drops during use, ensure sterility of the solution used each time, and at the same time take into account ease of use and cost controllability.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: This invention discloses a segmented one-way anti-reverse eye drop assembly, comprising a bottle body, a Tesla valve, and a bottle cap. The inlet end of the Tesla valve is fixedly connected to the open end of the bottle body. The Tesla valve includes multiple Tesla valve units. At least one Tesla valve unit near the open end of the bottle body serves as a Tesla valve base and is fixedly connected to the bottle body. Except for the Tesla valve unit serving as the Tesla valve base, the remaining Tesla valve units are sequentially connected end-to-end to the outlet end of the Tesla valve base. The bottle cap is connected to the outlet end of the Tesla valve unit located at the outlet end. The Tesla valve base and adjacent Tesla valve units, the remaining Tesla valve units (excluding the Tesla valve base), and the Tesla valve unit located at the outlet end and the bottle cap are all integrally connected by thin-walled connecting parts to form a sequentially breakable integral structure.

[0008] Preferably, a label block is integrally and fixedly connected to the tail end of the bottle body, and the label block is used to print the medication information of the eye drops.

[0009] Preferably, the bottle body has an integrally fixed connection to a connecting post at the open end, and the Tesla valve base has an insertion sleeve that engages with the connecting post at the inlet end. The outer surface of the connecting post is coated with an adhesive layer for bonding and connecting it to the inner surface of the insertion sleeve to form a whole.

[0010] Preferably, the connecting post is configured as a tapered structure with a diameter that gradually increases from the first liquid outlet to the first liquid inlet, and the shape of the insert sleeve matches the shape of the connecting post.

[0011] Preferably, the Tesla valve unit includes a pear-shaped outer shell, a connecting plate, a flow direction adjustment ring, and a flow direction adjustment cone. The pear-shaped outer shell is a hollow shell structure, and a second liquid inlet and a second liquid outlet are respectively provided at the front and rear ends of the pear-shaped outer shell. The two connecting plates are symmetrically arranged inside the cavity of the pear-shaped outer shell and are fixedly connected to the inner wall of the pear-shaped outer shell. The flow direction adjustment ring and the flow direction adjustment cone are arranged sequentially inside the cavity of the pear-shaped outer shell according to the liquid flow direction from the second liquid inlet to the second liquid outlet, and both the flow direction adjustment ring and the flow direction adjustment cone are fixedly connected to the inner wall of the cavity of the pear-shaped outer shell through the connecting plate.

[0012] Preferably, the outer surface of the flow direction adjusting ring is configured as a pear-shaped structure, the vertical cross-section of the flow direction adjusting ring is in the shape of two water droplets, and the sidewall thickness of the flow direction adjusting ring gradually decreases along the direction from the liquid inlet to the liquid outlet of the pear-shaped shell.

[0013] Preferably, the flow direction adjusting cone is a solid structure, and the end of the flow direction adjusting cone near the flow direction adjusting ring is conical, while the other end of the flow direction adjusting cone is boss-shaped.

[0014] Preferably, the thin-walled connection portion is formed by a V-shaped groove formed in the circumferential direction of the pipe wall at the corresponding connection point, and the remaining wall thickness at the V-shaped groove is 1 / 4 to 1 / 3 of the normal wall thickness.

[0015] Compared with the prior art, the beneficial technical effects of the present invention are as follows: 1) By connecting multiple Tesla valve units sequentially between the bottle body and cap, and incorporating thin-walled connectors between adjacent components, the entire dispensing channel is divided into multiple independently usable units that can be broken off sequentially. Before each use, the user simply breaks off the previously used Tesla valve unit to expose a brand-new, untouched dispensing port, ensuring that each drop flows only through a clean and sterile channel. This segmented design fundamentally eliminates the cross-contamination pathway caused by the repeated use of the same dispensing port in traditional eye drop bottles, effectively protecting the patient's hygiene and safety throughout the entire medication cycle. 2) Each Tesla valve unit is equipped with a flow direction adjustment ring and a flow direction adjustment cone. When the eye drops are dispensed by squeezing in the forward direction, the eye drops can pass smoothly and drip out with very low flow resistance under the guidance of the flow direction adjustment ring and the flow direction adjustment cone. The user only needs a small amount of squeezing force to complete the operation. When the bottle is released and negative pressure is generated inside the bottle, the synergistic effect of the back of the frustum of the flow direction adjustment cone and the flow direction adjustment ring will form a strong resistance to the backflow of liquid and external air, firmly blocking them inside the Tesla valve unit at the end of the liquid outlet direction, preventing them from flowing back into the bottle, thus effectively maintaining the sterility of the remaining liquid in the bottle. 3) The integrated label block at the end of the bottle directly integrates medication information onto the product itself, avoiding the problems of traditional adhesive labels falling off due to moisture or wear, or the text becoming blurred. This allows patients to clearly check medication information at any time during use, reducing the risk of misuse. Simultaneously, the connecting post at the bottle opening and the insertion sleeve of the Tesla valve base use a conical fit and are secured with an adhesive layer. This allows for automatic alignment during assembly, ensuring a reliable seal and high tensile and torsional strength. This guarantees that the entire liquid flow path from extrusion to dripping will not leak or loosen, providing structural protection for the stable use of the device. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings.

[0017] Figure 1 This is a schematic diagram of the overall structure of a segmented one-way anti-reverse eye drop combination device according to the present invention. Figure 2 This is a schematic diagram of the bottle body in this invention; Figure 3 This is a schematic diagram of the connection structure between the Tesla valve and the bottle cap in this invention; Figure 4 This is a schematic diagram of the internal structure of the Tesla valve in this invention; Figure 5 This is a schematic diagram showing the flow direction of the eye drops inside the Tesla valve when the present invention is in use; Figure 6 This is a schematic diagram showing the flow of eye drops inside the Tesla valve after the invention has been discontinued. Figure 7 This is a schematic diagram of the Tesla valve unit in this invention; Figure 8 This is a schematic diagram of the connection structure between the flow direction adjustment ring and the flow direction adjustment cone in this invention.

[0018] Explanation of reference numerals in the attached drawings: 1. Bottle body; 11. Label block; 12. Connecting post; 2. Tesla valve; 21. Insert sleeve; 22. Tesla valve base; 23. Tesla valve unit; 231. Pear-shaped outer shell; 232. Connecting plate; 233. Flow direction adjustment ring; 234. Flow direction adjustment cone; 3. Bottle cap. Detailed Implementation

[0019] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0020] like Figure 1-8As shown, a segmented one-way anti-reverse eye drop assembly includes a bottle body 1, a Tesla valve 2, and a bottle cap 3. The inlet end of the Tesla valve 2 is fixedly connected to the open end of the bottle body 1. The Tesla valve 2 includes multiple Tesla valve units 23. At least one Tesla valve unit 23 near the open end of the bottle body 1 serves as a Tesla valve base 22 and is fixedly connected to the bottle body 1. Except for the Tesla valve unit 23 serving as the Tesla valve base 22, the remaining Tesla valve units 23 are sequentially connected end-to-end to the outlet end of the Tesla valve base 22. The bottle cap 3 is connected to the outlet end of the Tesla valve unit 23 located at the outlet direction end. The Tesla valve base 22 and adjacent Tesla valve units 23, the remaining Tesla valve units 23 except for the Tesla valve base 22, and the Tesla valve unit 23 located at the outlet direction end and the bottle cap 3 are all integrally connected by thin-walled connecting parts to form a single structure that can be broken apart sequentially.

[0021] Specifically, the pipe wall connection between the Tesla valve base 22 and the adjacent Tesla valve unit 23, the pipe wall connection between two adjacent Tesla valve units 23, and the pipe wall connection between the Tesla valve unit 23 at the very end of the liquid outlet direction and the bottle cap 3 are all provided with V-shaped grooves extending in the circumferential direction to form the thin-walled connection part. In use, the user holds the upper-level component to be separated with one hand and the lower-level component with the other, applying bending or torsional force along the V-shaped groove to neatly separate the two along this weak point, thus achieving segmented separation. After separation, the original liquid outlet of the Tesla valve unit 23 at the very end of the device is exposed, serving as the eye drop outlet for the current use. With this structure, only one Tesla valve unit 23 needs to be broken off per use, ensuring that each dispensing is fresh medication while preventing contamination of the remaining portion.

[0022] Specifically, a label block 11 is integrally and fixedly connected to the tail end of the bottle body 1. The label block 11 is used to print the medication information of the eye drops.

[0023] Specifically, the label block 11 is a flat, rectangular thin sheet, the length of which is aligned with the axis of the bottle body 1, and extends outward from the center of the tail end face of the bottle body 1, integrally formed with the bottle body 1 through injection molding. Both wide surfaces of the label block 11 can be used to print information, typically including the drug name, concentration, expiration date, and batch number. The printing method can be laser marking or pad printing, thus providing durable and reliable medication identification throughout the entire usage cycle.

[0024] Specifically, the bottle body 1 has an integrally fixed connection to a connecting post 12 at its open end, and the Tesla valve base 22 has an insertion sleeve 21 that is inserted into and cooperates with the connecting post 12 at its inlet end. The outer surface of the connecting post 12 is coated with an adhesive layer for bonding and connecting with the inner surface of the insertion sleeve 21 to form a whole.

[0025] Specifically, the connecting post 12 is configured as a tapered structure with a diameter that gradually increases from the first liquid outlet to the first liquid inlet, and the shape of the insertion sleeve 21 matches the shape of the connecting post 12.

[0026] Specifically, the outer conical surface of the connecting post 12 and the inner conical surface of the insertion sleeve 21 serve as automatic guides and positions during the insertion process. During assembly, the worker aligns the connecting post 12 with the opening of the insertion sleeve 21 and pushes it in axially. The two conical surfaces gradually come together without additional alignment. The mating conical surfaces create a wedging force at the connection point, increasing the bonding area and providing preliminary pre-tightening and sealing before the adhesive cures, effectively preventing leakage of eye drops at the connection. After the adhesive cures, the conical mating surfaces interlock with the cured adhesive, further enhancing the tensile and torsional strength of the connection.

[0027] Specifically, the Tesla valve unit 23 includes a pear-shaped outer shell 231, a connecting plate 232, a flow direction adjustment ring 233, and a flow direction adjustment cone 234. The pear-shaped outer shell 231 is a hollow shell structure, and a second liquid inlet and a second liquid outlet are respectively provided at the front and rear ends of the pear-shaped outer shell 231. The two connecting plates 232 are symmetrically arranged inside the cavity of the pear-shaped outer shell 231 and are fixedly connected to the inner wall of the pear-shaped outer shell 231. The flow direction adjustment ring 233 and the flow direction adjustment cone 234 are arranged sequentially inside the cavity of the pear-shaped outer shell 231 in accordance with the liquid flow direction from the second liquid inlet to the second liquid outlet, and both the flow direction adjustment ring 233 and the flow direction adjustment cone 234 are fixedly connected to the inner wall of the cavity of the pear-shaped outer shell 231 through the connecting plate 232.

[0028] Specifically, both connecting plates 232 are thin sheet-like structures extending radially along the pear-shaped outer shell 231, symmetrically arranged inside the cavity of the pear-shaped outer shell 231. The outer edge of each connecting plate 232 is fixed to the inner cavity wall of the pear-shaped outer shell 231, while the inner edge is simultaneously fixedly connected to the outer wall of the flow direction adjustment ring 233 and the outer wall of the flow direction adjustment cone 234, thereby suspending and supporting the flow direction adjustment ring 233 and the flow direction adjustment cone 234 together at the center position of the cavity.

[0029] Specifically, when the eye drops flow forward, the liquid enters through the second inlet and is first directed towards the tail end of the adjusting ring 233, which is the end with the thicker sidewall, splitting into two streams. One stream flows forward along the inner cavity of the adjusting ring 233, while the other flows forward along the space between the outer wall of the adjusting ring 233 and the inner wall of the pear-shaped outer shell 231. The stream flowing forward along the inner cavity of the adjusting ring 233 then collides head-on with the conical tip of the adjusting cone 234, is separated again, and flows along the outer wall of the adjusting cone 234, merging with the stream that previously flowed along the space between the outer wall of the adjusting ring 233 and the inner wall of the pear-shaped outer shell 231, finally flowing smoothly out from the second outlet. The thin sheet structure of the connecting plate 232 has a very small thickness, and its impact on the liquid flow is negligible.

[0030] Specifically, when the eye drops flow in reverse, the liquid flows back from the second outlet and first directly impacts the back of the frustum of the flow direction adjustment cone 234, causing initial obstruction of the flow. Subsequently, most of the liquid is forced to change direction and flows backward along the space formed between the inner wall of the pear-shaped outer shell 231 and the outer wall of the flow direction adjustment cone 234. When the liquid reaches the thin-walled end of the flow direction adjustment ring 233, it is divided into two streams again: one stream flows backward along the inner cavity of the flow direction adjustment ring 233, and the other stream continues to flow backward along the space formed between the outer wall of the flow direction adjustment ring 233 and the inner wall of the pear-shaped outer shell 231. When the liquid flowing through the space between the outer wall of the flow-direction adjusting ring 233 and the inner wall of the pear-shaped outer shell 231 reaches the thick-walled end of the flow-direction adjusting ring 233, the annular flow channel there guides most of the liquid to turn back and flow back from the inlet end of the flow-direction adjusting ring 233 to the outlet end, thus forming a head-on collision with the liquid flowing back along the inner cavity of the flow-direction adjusting ring 233. This generates strong turbulence and vortices in the tail region of the flow-direction adjusting ring 233, thereby generating huge reverse resistance and achieving a near-complete one-way backflow prevention effect.

[0031] Specifically, the outer surface of the flow direction adjustment ring 233 is configured as a pear-shaped structure, the vertical cross-section of the flow direction adjustment ring 233 is in the shape of two water droplets, and the side wall thickness of the flow direction adjustment ring 233 gradually decreases along the direction from the liquid inlet to the liquid outlet of the pear-shaped outer shell 231.

[0032] Specifically, the pear-shaped structure on the outer surface of the flow direction adjustment ring 233 is similar in shape to the inner wall of the pear-shaped outer shell 231, together forming an annular flow channel of equal diameter. The vertical cross-section of the flow direction adjustment ring 233 presents a teardrop shape with a rounded bottom and a sharp top, which can cut and guide the liquid flowing in either the forward or reverse direction with minimal resistance. Its sidewall thickness gradually decreases from the thick-walled end near the second inlet to the thin-walled end near the second outlet. In forward flow, the thicker tail end can stably divide the liquid into two streams, ensuring the diversion effect; in reverse flow, the thin-walled end contacts the returning liquid first, and its thinner wall thickness makes it easier for the liquid to be guided and divided, while the annular flow channel at the thick-walled end can effectively guide the liquid back, promoting the flushing with the returning liquid in the inner cavity and enhancing the anti-reverse effect.

[0033] Specifically, the flow direction adjusting cone 234 is a solid structure, and the end of the flow direction adjusting cone 234 near the flow direction adjusting ring 233 is conical, while the other end of the flow direction adjusting cone 234 is boss-shaped.

[0034] Specifically, the conical end of the flow direction regulating cone 234 has a sharp cone angle designed to directly face the liquid flowing out from the inner cavity of the flow direction regulating ring 233, smoothly dividing it into two streams that are guided along the conical surface to both sides of the second outlet, minimizing pressure loss during forward flow. The other end's boss-shaped structure has a flat annular end face. During reverse flow, this end face acts as the first barrier, directly bearing the impact of the backflowing liquid, dissipating most of its kinetic energy, and forcing the liquid to change direction, flowing forward between the inner wall of the pear-shaped outer shell 231 and the outer wall of the flow direction regulating cone 234, creating conditions for subsequent countercurrent flow in the flow direction regulating ring 233 region. Simultaneously, the solid structure gives the entire flow direction regulating cone 234 high strength, preventing deformation or fatigue damage under long-term alternating forward and reverse liquid pressure, ensuring the long-term stability of its unidirectional check valve performance.

[0035] Specifically, the thin-walled connection is formed by a V-shaped groove on the circumferential direction of the pipe wall at the corresponding connection point, and the remaining wall thickness at the V-shaped groove is 1 / 4 to 1 / 3 of the normal wall thickness.

[0036] Specifically, the included angle of the V-shaped groove is preferably between 60 and 90 degrees, and the depth of the groove embedded in the tube wall remains uniform along the circumference. This structure ensures that when a bending force is applied, the stress is highly concentrated at the bottom sharp corner of the V-shaped groove, forming a clear fracture starting point. When the user forces the groove, the crack will rapidly expand along the entire circumference from this starting point, ultimately achieving a clean break. By controlling the remaining wall thickness to 1 / 4 to 1 / 3 of the normal wall thickness, it is ensured that the connection between each Tesla valve unit 23 is sufficiently strong when not in use, and will not break during transportation or handling; when separation is required, an adult user can easily break it with minimal force, resulting in a smooth and flat fracture surface without burrs or debris, making it clean and efficient to use.

[0037] The usage process of this invention is as follows: First, before the first use of the medication, the user checks the label 11, which is fixed to the end of the bottle body 1, to verify key medication information such as the name, concentration, and expiration date. After confirming that everything is correct, the user holds the bottle body 1 with one hand and the cap 3, which is located at the far end in the dispensing direction, with the other hand. The user applies bending force along the V-shaped groove at the connection between the cap 3 and the adjacent Tesla valve unit 23, and neatly breaks off the cap 3 along the thin-walled connection, exposing the dispensing port of the Tesla valve unit 23 at the far end in the dispensing direction. Next, the user aims the exposed outlet at the eye and gently squeezes the side wall of the bottle 1 with their finger. Under pressure, the eye drops enter the Tesla valve 2 from the opening of the bottle 1. Relying on the one-way conduction of the Tesla valve unit 23, the eye drops pass smoothly with very low flow resistance and finally drip steadily into the eye from the outlet of the Tesla valve unit 23 at the very end of the outlet direction. Furthermore, after a single drop of medication is completed, the user releases the side wall of the bottle 1. The bottle 1 tends to return to its original shape due to its own elasticity. At the same time, it causes the residual medication or external air at the outlet to tend to flow back. However, under the one-way anti-backflow action of the Tesla valve unit 23, the backflow is effectively prevented, and the remaining medication in the bottle 1 always remains sterile and will not be contaminated by the outside. Then, when the user needs to use the medication again, they hold the upstream component of the Tesla valve unit 23 at the end of the current dispensing direction with one hand, and hold the Tesla valve unit 23 at the end with the other hand. Apply bending force along the V-shaped groove at the connection point, neatly breaking off the used Tesla valve unit 23 along the thin-walled connection and discarding it. After breaking, a new, unused Tesla valve unit 23's dispensing port is exposed, serving as the eye drop outlet for the next use. Finally, the user repeats the above-described squeezing and dispensing process, consuming all the Tesla valve units 23 connected to the dispensing end of the Tesla valve base 22 in sequence, until the eye drops in the bottle 1 are used up. Throughout the entire usage cycle, the medication dispensed each time flows only through a Tesla valve unit 23 that has never been used before, ensuring that each dispensing is fresh. This fundamentally solves the problem of medication contamination caused by repeatedly using the same dispensing port, effectively guaranteeing medication safety.

[0038] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0039] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A segmented, one-way anti-reverse eye drop combination device, characterized in that: The device includes a bottle body (1), a Tesla valve (2), and a bottle cap (3). The inlet end of the Tesla valve (2) is fixedly connected to the open end of the bottle body (1). The Tesla valve (2) includes multiple Tesla valve units (23). At least one Tesla valve unit (23) near the open end of the bottle body (1) is fixedly connected to the bottle body (1) as a Tesla valve base (22). Except for the Tesla valve unit (23) that serves as the Tesla valve base (22), the remaining Tesla valve units (23) are sequentially connected. The tail is connected to the liquid outlet end of the Tesla valve base (22), and the bottle cap (3) is connected to the liquid outlet end of the Tesla valve unit (23) located at the end of the liquid outlet direction. The Tesla valve base (22) and the adjacent Tesla valve unit (23), the Tesla valve units (23) other than the Tesla valve base (22), and the Tesla valve unit (23) located at the end of the liquid outlet direction and the bottle cap (3) are all integrally connected by thin-walled connecting parts to form an integral structure that can be broken off in sequence.

2. The segmented one-way anti-reverse eye drop combination device according to claim 1, characterized in that: The end of the bottle body (1) is integrally and fixedly connected with a label block (11), which is used to print the medication information of the eye drops.

3. The segmented one-way anti-reverse eye drop combination device according to claim 1, characterized in that: The bottle body (1) has an integrally fixed connection to a connecting column (12) at the open end. The liquid inlet end of the Tesla valve base (22) is provided with a plug sleeve (21) that is plugged into the connecting column (12). The outer surface of the connecting column (12) is coated with an adhesive layer for bonding and connecting with the inner surface of the plug sleeve (21) to form a whole.

4. The segmented one-way anti-reverse eye drop combination device according to claim 3, characterized in that: The connecting post (12) is configured as a tapered structure with a diameter that gradually increases from the first liquid outlet to the first liquid inlet, and the shape of the insert sleeve (21) matches the shape of the connecting post (12).

5. A segmented one-way anti-reverse eye drop combination device according to claim 1, characterized in that: The Tesla valve unit (23) includes a pear-shaped shell (231), a connecting plate (232), a flow direction adjustment ring (233), and a flow direction adjustment cone (234). The pear-shaped shell (231) is a hollow shell structure, and a second liquid inlet and a second liquid outlet are respectively provided at the front and rear ends of the pear-shaped shell (231). The two connecting plates (232) are symmetrically arranged inside the cavity of the pear-shaped shell (231) and are fixedly connected to the inner wall of the pear-shaped shell (231). The flow direction adjustment ring (233) and the flow direction adjustment cone (234) are arranged sequentially inside the cavity of the pear-shaped shell (231) according to the liquid flow direction from the second liquid inlet to the second liquid outlet. The flow direction adjustment ring (233) and the flow direction adjustment cone (234) are both fixedly connected to the inner wall of the cavity of the pear-shaped shell (231) through the connecting plate (232).

6. A segmented one-way anti-reverse eye drop combination device according to claim 5, characterized in that: The outer surface of the flow direction adjustment ring (233) is configured as a pear-shaped structure. The vertical cross-section of the flow direction adjustment ring (233) is in the shape of two water droplets. The side wall thickness of the flow direction adjustment ring (233) gradually decreases along the direction from the liquid inlet to the liquid outlet of the pear-shaped outer shell (231).

7. A segmented one-way anti-reverse eye drop combination device according to claim 6, characterized in that: The flow direction adjusting cone (234) is a solid structure, and the end of the flow direction adjusting cone (234) near the flow direction adjusting ring (233) is conical, while the other end of the flow direction adjusting cone (234) is boss-shaped.

8. A segmented one-way anti-reverse eye drop combination device according to claim 1, characterized in that: The thin-walled connection is formed by a V-shaped groove on the circumferential direction of the pipe wall at the corresponding connection point, and the remaining wall thickness at the V-shaped groove is 1 / 4 to 1 / 3 of the normal wall thickness.

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