Bacteria-resistant eye drop pump head and eye drop administration device

Abstract

The application relates to the technical field of eye administration, and provides a bacteria-resisting eye drop pump head and an eye drop administration device, which comprises a pump head base mounted on a liquid storage bottle, a liquid outlet channel and a gas supplement channel which are both communicated with the liquid storage bottle are arranged on the base body, a liquid drop head which comprises a liquid drop tube part and a pressure receiving sliding part connected with the liquid drop tube part, a piston assembly which comprises a secondary piston and a primary piston, a main column which comprises a buckle pressure sealing part used for clamping the flexible sealing part in the liquid drop head, a plug rod part of the buckle pressure sealing part is arranged on one side of the liquid outlet tube part, the sliding tube part and the fixed tube part are in liquid-tight sliding fit to form a liquid storage chamber with variable volume and communicated with the converging tube part, a bacteria-resisting gas supplement structure which comprises a bacteria-resisting filter assembly and a gas supplement one-way valve, and the bacteria-resisting filter assembly is arranged in the gas supplement channel. The application avoids the air backflow along the flowing track of the eye drop to the liquid storage bottle, and achieves the purpose of bacteria resistance and gas supplement.

Description

Technical Field

[0001] This invention relates to the field of ocular drug delivery technology, and in particular to an antibacterial eye drop pump head and an eye drop delivery device. Background Technology

[0002] An eye drop bottle is a device used to store eye drops. Eye drops refer to a clear solution or suspension of a drug for use in the eyes, used to prevent or diagnose eye diseases. Eye drops are mainly aqueous solutions, with a small amount of aqueous suspension or oil solution. Eye drops are sterile aqueous or oily clear solutions, suspensions, or emulsions made from drugs and suitable excipients for instillation into the eye. Common uses and applications of eye drops: They are broad-spectrum antibiotics, particularly effective against drug-resistant Staphylococcus aureus among Gram-positive bacteria; they are also highly effective against enterocolitis and Pseudomonas aeruginosa among Gram-negative bacteria; they are mainly used to treat bacterial external and internal eye infections, and are used for eye infections caused by Escherichia coli, Pseudomonas aeruginosa, Proteus, Enterobacter aerogenes, and Staphylococcus.

[0003] Currently, ordinary eye drop bottles on the market have a simple structure and single function, mainly consisting of three parts: an outer cap, an inner stopper, and the bottle body. However, eye drops are sterile solutions made from raw materials and appropriate excipients, and once opened, ordinary eye drop bottles can only be used within a limited effective period. Specifically, ordinary eye drop bottles cannot prevent or inhibit bacteria. After opening, on the one hand, medication residue is easily left at the inner stopper opening. The moist environment of the residual medication quickly breeds bacteria, which then directly contaminate the eye drop solution inside the bottle through the open end of the inner stopper. On the other hand, due to poor sealing between the outer cap and the bottle body, air can easily enter the bottle, causing the medication to become contaminated and ineffective due to contact with air and bacterial growth.

[0004] Existing eye drop bottles have a serious drawback: the dispensing channel and the air supply channel are the same. Since the air drawn into the bottle has not undergone antibacterial treatment, it will more or less contaminate the eye drops inside. Furthermore, the commonly used squeeze-type dispensing bottles on the market cannot prevent external microorganisms from contaminating the medication inside the container after opening, and the medication residue at the opening can easily breed bacteria, thus affecting efficacy and even causing secondary harm to the patient's eyes. To prevent contamination, antibacterial agents are usually added; however, these agents can have side effects, such as irritating the conjunctiva. At the same time, the amount of medication dispensed varies depending on the user's squeezing force and the position of the bottle, making it difficult to effectively utilize the medication, and the operation is also inconvenient. Summary of the Invention

[0005] In view of the shortcomings of the prior art described above, the technical problem to be solved by the present invention is to provide an antibacterial eye drop pump head and an eye drop delivery device that can form independent air and liquid paths, preventing air from flowing back into the storage bottle along the flow path of the eye drops, thereby achieving the purpose of antibacterial and gas replenishment.

[0006] To solve the above-mentioned technical problems, the present invention provides an antibacterial eye drop pump head, comprising:

[0007] A pump head seat installed on a liquid storage bottle includes a seat body, a bottle clamping part on one side of the seat body, and a guide sliding part on the opposite side of the seat body. The seat body is provided with a liquid outlet channel and a gas replenishment channel that are both connected to the liquid storage bottle.

[0008] The drip head includes a drip tube section and a pressure-receiving sliding section connected to the drip tube section. The drip tube section has a drip chamber that opens toward the pump head seat. The top end of the drip tube section is provided with a drip hole that communicates with the drip chamber. The pressure-receiving sliding section is slidably sleeved on the guide section in a resettable manner.

[0009] The piston assembly includes a secondary piston and a main piston. The secondary piston includes a flow guiding joint portion located in the seat, a manifold portion located in the flow guiding joint portion, and a fixed pipe portion surrounding the manifold portion and open on one side. The manifold portion is connected to the liquid outlet channel. The main piston includes a flexible joint portion located inside the drip head and capable of restoring deformation, and a liquid outlet portion located in the flexible joint portion and axially moving in the drip chamber under the drive of the flexible joint portion. A liquid release hole is provided at one end of the liquid outlet portion near the drip hole.

[0010] The main column includes a snap-fit ​​joint that holds the flexible sealing part inside the drip head. One side of the snap-fit ​​joint has an insertion rod located within the inner cavity of the outlet tube. A hydraulic flow channel is formed between the insertion rod and the outlet tube. The end of the insertion rod and the end of the outlet tube form a hydraulically sealed fit that releases under a preset hydraulic pressure. On the opposite side of the snap-fit ​​joint, there is a pull-in / pull-out column and a sliding tube that surrounds the pull-in / pull-out column and is open on one side. The sliding tube and the fixed tube are hydraulically slidably fitted to form a liquid storage chamber with variable volume that communicates with the manifold. The snap-fit ​​joint also has a flow hole that connects the hydraulic flow channel and the liquid storage chamber.

[0011] The antibacterial and gas-replenishing structure includes an antibacterial filter component and a gas-replenishing one-way valve. The antibacterial filter component is installed inside the gas-replenishing channel, and the gas-replenishing one-way valve is located at the gas outlet end of the gas-replenishing channel.

[0012] Furthermore, the antibacterial eye drop pump head also includes a reset assembly, which includes a first elastic element and a second elastic element. The first elastic element is used to reset the drop head, and the second elastic element is used to reset the flexible sealing portion.

[0013] Furthermore, an annular positioning groove is provided at the junction of the flexible sealing part and the liquid outlet part; one end of the second elastic member abuts in the annular positioning groove and the other end abuts in the cavity wall of the dripping cavity.

[0014] Furthermore, the antibacterial eye drop pump head also includes an inner plug sleeve that indirectly connects the secondary piston to the seat body. The inner plug sleeve has a drain sleeve, an air supply sleeve, and a receiving groove. The drain sleeve is liquid-tightly inserted into the liquid outlet channel, the air supply sleeve is sleeved on the air inlet end of the air supply channel, and the receiving groove is liquid-tightly engaged with the flow guide.

[0015] Furthermore, the antibacterial filtration assembly includes a sleeve core disposed within the air supply channel, an antibacterial filter membrane disposed within the sleeve core, and a retaining ring that abuts and holds the antibacterial filter membrane in place.

[0016] Furthermore, an antibacterial element is provided in the drip cavity near the drip hole.

[0017] Furthermore, the antibacterial eye drop pump head also includes a dust cap, which is detachably covered on the dropper section. The top of the dust cap has a sealing protrusion for sealing the dropper orifice and an air hole that allows outside air to flow into the dust cap.

[0018] The present invention also provides an eye drop delivery device, comprising:

[0019] A liquid storage bottle, which has a bottle opening;

[0020] The antibacterial eye drop pump head has a pump head seat that can be detachably snapped onto the bottle opening;

[0021] The press-expansion structure is located in the pressure-receiving sliding part of the drip head.

[0022] Furthermore, the press extension structure includes a protective press cover, which has a clearance hole that allows the dropper to pass through. The protective press cover is fixedly installed on the pressure sliding part and slides with the outer peripheral wall of the liquid storage bottle. The protective press cover is provided with a press handle.

[0023] Furthermore, the press-extend structure includes a protective press cover and a bottle cover. The bottle cover is fitted and fixed to a part of the liquid storage bottle. The protective press cover has a clearance hole that allows the dropper to pass through. The protective press cover is fixedly installed on the pressure-bearing sliding part. The protective press cover and the bottle cover are slidably fitted together, and an anti-detachment structure is provided between the protective press cover and the bottle cover.

[0024] As described above, the antibacterial eye drop pump head and eye drop delivery device of the present invention have the following beneficial effects: The design principle of the antibacterial eye drop pump head is as follows: the product design separates the air and liquid channels, the liquid outlet channel only allows the eye drops to flow out of the storage bottle, and the air replenishment channel is responsible for compensating for air and only allows filtered air to flow into the storage bottle, thereby achieving the purpose of antibacterial and air replenishment. The working process of the antibacterial eye drop pump head is as follows: S1, assemble the antibacterial eye drop pump head and the reservoir bottle into an eye drop delivery device, and invert the eye drop delivery device; S2, press the pressing expansion structure; S3, the air in the reservoir chamber is discharged; S4, release the pressing expansion structure, the drop head resets, and a vacuum negative pressure is formed in the reservoir chamber; S5, the liquid in the reservoir bottle is drawn into the reservoir chamber; S6, after the reservoir chamber is full of liquid, the pressure creates pressure that pushes open the main piston to release the liquid-tight fit between the end of the insertion rod and the end of the outlet tube, thereby releasing a precise droplet; S7, after the pressure is released, the flexible sealing part resets, and the outlet tube moves upward to its original position under the drive of the flexible sealing part until the end of the insertion rod and the end of the outlet tube re-establish a liquid-tight fit to prevent liquid backflow. The vacuum created by the discharge of liquid in the storage bottle is filled by the subsequent inflow of air. Due to different usage environments, the external ambient air is filtered by the antibacterial filter component, thereby preventing the eye drops from being contaminated by microorganisms in the air and achieving the purpose of antibacterial protection.

[0025] The antibacterial eye drop pump head can form independent air and liquid paths, preventing air from flowing back into the reservoir along the path of the eye drops, thus achieving the purpose of antibacterial and air replenishment.

[0026] The eye drop delivery device features antibacterial and gas-injection functions, effectively preventing airborne bacteria from contaminating the eye drops in the reservoir. A press-and-expand structure is located on the pressure-sensitive sliding part of the dropper head, making it easier for patients to hold and press the dropper head, thus facilitating eye drop delivery. Attached Figure Description

[0027] Figure 1 Shown is a perspective view of a first embodiment of the eye drop delivery device of the present invention;

[0028] Figure 2 Shown is a cross-sectional view of a first embodiment of the eye drop delivery device of the present invention;

[0029] Figure 3 Shown is an exploded view of a first embodiment of the eye drop delivery device of the present invention;

[0030] Figure 4 Shown is a perspective view of a second embodiment of the eye drop delivery device of the present invention;

[0031] Figure 5Shown is a cross-sectional view of a second embodiment of the eye drop delivery device of the present invention;

[0032] Figure 6 Shown is an exploded view of a second embodiment of the eye drop delivery device of the present invention;

[0033] Figure 7 The diagram shows the connection between the antibacterial eye drop pump head and the reservoir bottle of the present invention.

[0034] Figure 8 The diagram shows an inverted view of the antibacterial eye drop pump head and reservoir bottle of the present invention.

[0035] Figure 9 Displayed as a 3D view of the pump head seat;

[0036] Figure 10 Shown as a cross-sectional view of the pump head seat;

[0037] Figure 11 Displayed as a 3D view of the dropper head;

[0038] Figure 12 Shown as a cross-sectional view of the drip head;

[0039] Figure 13 The diagram shows the connection between the auxiliary piston and the inner sleeve.

[0040] Figure 14 Shown as a cross-sectional view of the auxiliary piston and inner sleeve;

[0041] Figure 15 Showing a 3D view of the main piston;

[0042] Figure 16 Displaying a 3D view of the main column;

[0043] Figure 17 Showing a sectional view of the main column;

[0044] Figure 18 This diagram shows a usage state of a second embodiment of the eye drop delivery device of the present invention.

[0045] Component designation explanation

[0046] 01 Liquid storage bottle

[0047] 011 Bottle neck

[0048] 02 Press-to-Expand Structure

[0049] 021 Protective Press Cover

[0050] 022 Clearance Hole

[0051] 023 Press handle

[0052] 024 Bottle Protector

[0053] 025 Anti-detachment structure

[0054] 1 Pump head seat

[0055] 11 seat body

[0056] 12. Bottle section

[0057] 13 Guide slide

[0058] 14. Liquid outlet channel

[0059] 15. Replenishment Channel

[0060] 2 Dropper

[0061] 21. Dropper Section

[0062] 22 Pressure-bearing sliding part

[0063] 23. Dropping chamber

[0064] 24 drip holes

[0065] 25 antibacterial components

[0066] 3 secondary pistons

[0067] 31. Flow guiding and tight connection part

[0068] 32. Manifold Section

[0069] 33 Fixed pipe section

[0070] 4. Main Piston

[0071] 41 Flexible close connection part

[0072] 42 Discharge pipe part

[0073] 43 Liquid release port

[0074] 44 Annular positioning groove

[0075] 5 main pillars

[0076] 51 crimp the tight joint part

[0077] 52 Insertion rod section

[0078] 53 Hydraulic flow channel

[0079] 54 Insertion and Retraction Column

[0080] 55 Sliding tube section

[0081] 56. Liquid storage chamber

[0082] 57. Flow hole

[0083] 6. Antibacterial and gas-replenishing structure

[0084] 61 Antibacterial Filter Components

[0085] 611 core

[0086] 612 Antibacterial Filter Membrane

[0087] 613 retaining ring

[0088] 62 Air replenishment check valve

[0089] 7. Reset Component

[0090] 71 First elastic element

[0091] 72 Second elastic element

[0092] 8 Inner plug sleeve

[0093] 81 Drainage sleeve part

[0094] 82 Gas Injection Casing Section

[0095] 83 Receiving recess

[0096] 9. Dust cap

[0097] 91. Seal the protruding part

[0098] 92 pores Detailed Implementation

[0099] The following specific embodiments illustrate the implementation 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.

[0100] It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings of this specification are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of the invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the technical content disclosed in this invention. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and are not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.

[0101] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, the present invention provides an eye drop delivery device, comprising:

[0102] Liquid storage bottle 01, liquid storage bottle 01 has a bottle mouth 011;

[0103] An antibacterial eye drop pump head, wherein the pump head seat 1 of the antibacterial eye drop pump head is detachably snapped onto the bottle mouth 011;

[0104] Pressing extension structure 02 is provided in the pressure-receiving sliding part 22 of the dropper head 2 of the antibacterial eye drop pump head.

[0105] In the eye drop delivery device of the present invention, the antibacterial eye drop pump head has an antibacterial and air-replenishing function, which can effectively prevent bacteria in the air from contaminating the eye drops in the storage bottle 01. The press extension structure 02 is provided on the pressure-receiving sliding part 22 of the drop head 2. This arrangement makes it easier for the patient to hold and press the drop head 2, making the eye drug delivery operation more convenient.

[0106] To improve the liquid tightness of the eye drop delivery device, the pump head seat 1 can be pressed onto the bottle opening 011 by a seal (e.g., a silicone gasket), thereby preventing liquid from leaking between the pump head seat 1 and the storage bottle 01.

[0107] like Figure 1 , Figure 2 as well as Figure 3 As shown, in the first embodiment of the eye drop delivery device: the eye drop delivery device is a press-type structure. The press extension structure 02 includes a protective press cover 021 and a bottle cover 024. The bottle cover 024 is fitted and fixed to a part of the liquid storage bottle 01. The protective press cover 021 has a clearance hole 022 that allows the drop head 2 (specifically the dropper part 21 of the drop head 2) to pass through. The protective press cover 021 is fixedly disposed on the pressure sliding part 22. The protective press cover 021 and the bottle cover 024 are slidably engaged, and an anti-detachment structure 025 is provided between the protective press cover 021 and the bottle cover 024. This design offers several advantages. First, the protective press cover 021 and the bottle cover 024 together form a protective space for the pressure-bearing sliding part 22 of the reservoir bottle 01, pump head seat 1, and drip head 2, reducing contamination of these components and minimizing dust entry into the sliding joint between the pressure-bearing sliding part 22 and the pump head seat 1. Second, the patient's fingers can more easily apply pressure to the pressure-bearing sliding part 22 of the drip head 2 through the extended pressing structure 02. Third, the protective press cover 021 and the bottle cover 024 together provide light protection for the reservoir bottle 01 or shield sensitive information from its contents.

[0108] like Figure 4 , Figure 5 as well as Figure 6 As shown, in a second embodiment of the eye drop delivery device: to facilitate eye administration for patients, the eye drop delivery device can also be a handle-type structure. The press extension structure 02 includes a protective press cover 021. The protective press cover 021 has a clearance hole 022 that allows the dropper head 2 (specifically, the dropper portion 21 of the dropper head 2) to pass through. The protective press cover 021 is fixedly mounted on the pressure-bearing sliding portion 22. The protective press cover 021 slides in cooperation with the outer peripheral wall of the reservoir bottle 01. The protective press cover 021 is provided with a press handle 023. The press handle 023 is the part of the patient's finger that applies force. See details. Figure 18 When in use, the patient applies force with their thumb to press the handle 023, and the patient's index and / or middle fingers pinch and hold the liquid storage bottle 01.

[0109] The first and second embodiments of the eye drop delivery device operate on the same principle, with the only difference being the press-expansion structure 02.

[0110] exist Figure 8 In the diagram, the dashed curve represents the path of air flow, and the solid curve represents the path of eye drops flow.

[0111] Combined Figure 7 , Figure 8 As shown, in order to enable the antibacterial eye drop pump head to have antibacterial and gas-replenishing functions, the antibacterial eye drop pump head includes:

[0112] Pump head seat 1 installed on a liquid storage bottle 01 (see details) Figure 9 and Figure 10 The pump head seat 1 includes a seat body 11, a bottle clamping part 12 provided on one side of the seat body 11, and a guide sliding part 13 provided on the opposite side of the seat body 11. The seat body 11 is provided with a liquid outlet channel 14 and a gas replenishment channel 15, both of which are connected to the liquid storage bottle 01.

[0113] Dropper 2 (see details) Figure 11 and Figure 12 The drip head 2 includes a drip tube 21 and a pressure-receiving sliding part 22 connected to the drip tube 21. The drip tube 21 has a drip chamber 23 that opens toward the pump head seat 1. The top end of the drip tube 21 is provided with a drip hole 24 that communicates with the drip chamber 23. The pressure-receiving sliding part 22 is slidably sleeved on the guide part 13.

[0114] Piston assembly, the piston assembly includes secondary piston 3 (see details) Figure 13 and Figure 14 ) and main piston 4 (see details) Figure 15The auxiliary piston 3 includes a flow guiding and sealing part 31 disposed on the seat part 11, a manifold part 32 disposed on the flow guiding and sealing part 31, and a fixed pipe part 33 surrounding the manifold part 32 and open on one side. The manifold part 32 is connected to the liquid outlet channel 14. The main piston 4 includes a flexible sealing part 41 disposed inside the drip head 2 and capable of restoring and deforming, and a liquid outlet part 42 disposed on the flexible sealing part 41 and axially moving in the drip chamber 23 under the drive of the flexible sealing part 41. The liquid outlet part 42 is provided with a liquid release hole 43 at one end near the drip hole 24.

[0115] Main column 5 (see details) Figure 16 and Figure 17 The main column 5 includes a snap-fit ​​joint 51 that holds the flexible sealing joint 41 inside the drip head 2. One side of the snap-fit ​​joint 51 is provided with an insertion rod 52 located in the inner cavity of the liquid outlet tube 42. A hydraulic flow channel 53 is formed between the insertion rod 52 and the liquid outlet tube 42. The end of the insertion rod 52 and the end of the liquid outlet tube 42 form a liquid-tight fit relationship that is released under a preset hydraulic pressure. On the opposite side of the snap-fit ​​joint 51, there is a pull-in column 54 and a sliding tube 55 that surrounds the pull-in column 54 and is open on one side. The sliding tube 55 and the fixed tube 33 are liquid-tightly slidingly fitted to form a liquid storage chamber 56 with variable volume that communicates with the manifold 32. The snap-fit ​​joint 51 is also provided with a flow hole 57 that connects the hydraulic flow channel 53 and the liquid storage chamber 56.

[0116] The antibacterial and gas-replenishing structure 6 includes an antibacterial filter component 61 and a gas-replenishing one-way valve 62. The antibacterial filter component 61 is installed in the gas-replenishing channel 15, and the gas-replenishing one-way valve 62 is located at the gas outlet of the gas-replenishing channel 15.

[0117] The design principle of the antibacterial eye drop pump head is as follows: the product design separates the air and liquid channels. The liquid outlet channel 14 only allows the eye drops to flow out of the storage bottle 01, and the air replenishment channel 15 is responsible for replenishing air and only allows filtered air to flow into the storage bottle 01, thereby achieving the purpose of antibacterial and air replenishment.

[0118] The working process of the antibacterial eye drop pump head is as follows:

[0119] S1. Assemble the antibacterial eye drop pump head and the reservoir bottle 01 into an eye drop delivery device, and invert the eye drop delivery device; S2. Press the press extension structure 02 (specifically, the protective press cover 021 or the press handle 023); S3. Air is expelled from the reservoir chamber 56; S4. Release the press extension structure 02, the drop head 2 resets, and a vacuum negative pressure is formed in the reservoir chamber 56; S5. Liquid in the reservoir bottle 01 is drawn into the reservoir chamber 56; S6. When the liquid in the liquid chamber 56 is full, the pressure creates pressure that pushes open the main piston 4, thereby releasing the liquid-tight fit between the end of the insertion rod 52 and the end of the liquid outlet tube 42, thus releasing a precise droplet; S6, after the pressure is released, the flexible sealing part 41 resets, and the liquid outlet tube 42 moves upward to its original position under the drive of the flexible sealing part 41, until the end of the insertion rod 52 and the end of the liquid outlet tube 42 form a liquid-tight fit again to prevent liquid backflow.

[0120] The vacuum formed by the discharge of liquid in the storage bottle 01 is filled by the subsequent inflow of air. Due to different usage environments, the external ambient air is filtered by the antibacterial filter component 61, thereby preventing the eye drops from being contaminated by microorganisms in the air and achieving the purpose of antibacterial protection.

[0121] Please refer to the following for details. Figure 8 The antibacterial eye drop pump head mainly includes three usage states;

[0122] First usage state: Press the pressure-receiving sliding part 22 indirectly or directly, and the main column and the auxiliary piston repeatedly slide and cooperate, so that the volume of the liquid storage chamber 56 increases or decreases, so that negative pressure is generated in the liquid storage chamber 56 to draw liquid into the liquid storage chamber 56. When the hydraulic pressure in the hydraulic flow channel 53 reaches the preset hydraulic pressure, a gap appears between the end of the insertion rod part 52 and the end of the liquid outlet pipe part 42, and the liquid drips out.

[0123] Second usage state: The pressure-bearing sliding part 22 is pressed and slid to the limit position, liquid drips out, and after the pressure is released, the liquid outlet pipe part 42 of the main piston 4 is reset, and the end of the insertion rod part 52 and the end of the liquid outlet pipe part 42 are liquid-tightly fitted again.

[0124] Third usage state: When the pressure-bearing sliding part 22 is no longer under pressure, the drip head 2 returns to its original position, and the liquid in the storage bottle 01 is drawn back into the storage chamber 56 under negative pressure. Specifically, the negative pressure generated by the drip head 2 returning to its original position draws the next equal amount of medicine into the storage chamber 56 to prepare for the next medicine drip, thereby controlling the stability of the amount of liquid discharged with each press.

[0125] The flow path of eye drops is explained below:

[0126] First, Figure 8The solid curve in the figure represents the flow trajectory of the eye drops. Under normal conditions, a liquid-tight fit is formed between the end of the insertion rod 52 and the end of the dispensing tube 42.

[0127] Second, the insertion / retraction section 54 of the main column 5 and the manifold section 32 of the auxiliary piston 3 are liquid-tight sliding joints. When the insertion / retraction section 54 of the main column 5 is gradually withdrawn from the manifold section 32, the volume of the reservoir chamber 56 increases to generate negative pressure. The liquid in the reservoir bottle 01 flows sequentially through the outlet channel 14, the guide joint 31, the manifold section 32, and the reservoir chamber 56. When the insertion / retraction section 54 of the main column 5 is gradually slid into the manifold section 32, the volume of the reservoir chamber 56 decreases to generate positive pressure. The liquid in the reservoir chamber 56 flows sequentially through the flow hole 57, the hydraulic flow channel 53, the liquid release hole 43, and the drip hole 24, and is finally dripped into the patient's eye.

[0128] Third, when the hydraulic pressure in the hydraulic channel 53 is less than the preset hydraulic pressure, the liquid outlet section 42 of the main piston 4 completes the reset action, and the end of the insertion rod section 52 and the end of the liquid outlet section 42 form a liquid-tight fit relationship again, preventing air from flowing back into the storage bottle 01 along the flow path of the eye drops.

[0129] The following is an explanation of the airflow path:

[0130] First, Figure 8 The dashed curve indicates the trajectory of the gas flow.

[0131] Second, there is a gap between the guide slide 13 and the pressure slide 22, which allows air to flow into the inner cavity of the guide slide 13. Then the air flows into the air supply channel 15 and is filtered out by the antibacterial filter assembly 61.

[0132] Third, the gas replenishment check valve 62 of the antibacterial gas replenishment structure 6 only allows gas to pass in the forward direction to compensate for the air in the liquid storage bottle 01, and the liquid in the liquid storage bottle 01 cannot pass in the reverse direction through the gas replenishment check valve 62.

[0133] Fourth, air compensation and liquid dripping are repeatedly recycled.

[0134] The main components of the antibacterial eye drop pump head are described below:

[0135] Drop head 2: Head base component, the interior of which is used to install the main piston 4;

[0136] Main column 5: Fixed on the drip head 2 and the main piston 4, it cooperates with the main piston 4 to form a hydraulic flow channel 53. The hydraulic flow channel 53 is used to flow through the liquid to be dripped. The head of the insertion part 52 of the main column 5 is sealed with the head of the liquid outlet part 42 of the main piston 4, so that gas cannot pass through this channel. The insertion and withdrawal part 54 and the sliding tube part 55 of the main column 5 cooperate with the auxiliary piston to extract air and squeeze the liquid.

[0137] Pump head seat 1: Used to connect the liquid storage bottle 01 and the drip head 2. It is a fixed support for the antibacterial gas supply structure 6 and the auxiliary piston, as well as the forming carrier for the liquid outlet channel 14 and the gas supply channel 15.

[0138] Main piston: Installed on the drip head 2, it cooperates with the main column to form a hydraulic flow channel 53. When the hydraulic pressure in the hydraulic flow channel 53 reaches the preset hydraulic pressure, it pushes the main piston open and releases a precise droplet. After the hydraulic pressure is released, the main piston returns to its original position to prevent liquid backflow.

[0139] Secondary piston: It can be indirectly installed on the pump head seat 1 through an inner plug sleeve, and is used to introduce the liquid in the liquid storage bottle 01 into the liquid storage chamber 56.

[0140] Air replenishment check valve 62: A component fixed on the pump head seat 1, which opens and closes the air replenishment channel 15 when the drip head 2 moves.

[0141] Therefore, the antibacterial eye drop pump head of the present invention can form independent air and liquid paths, preventing air from flowing back into the reservoir along the flow path of the eye drops, thus achieving the purpose of antibacterial and air replenishment.

[0142] To enable the dropper head 2 and the main piston 4 to automatically reset, the antibacterial eye drop pump head further includes a reset assembly 7. The reset assembly 7 includes a first elastic element 71 and a second elastic element 72. The first elastic element 71 is used to reset the dropper head 2, and the second elastic element 72 is used to reset the flexible sealing portion 41. Specifically, both the first elastic element 71 and the second elastic element 72 are compression springs.

[0143] Furthermore, one end of the first elastic member 71 abuts against the flow guiding and sealing portion 31 of the auxiliary piston 3, and the other end of the first elastic member 71 abuts against the snapping sealing portion 51.

[0144] Furthermore, to prevent the second elastic element 72 from moving radially, the second elastic element 72 is sleeved on the liquid outlet section 42, and an annular positioning groove 44 is provided at the junction of the flexible sealing section 41 and the liquid outlet section 42; one end of the second elastic element 72 abuts against the annular positioning groove 44 and the other end abuts against the cavity wall of the dripping chamber 23.

[0145] Furthermore, to facilitate the installation of the secondary piston 3, the antibacterial eye drop pump head also includes an inner plug sleeve 8 that indirectly connects the secondary piston 3 to the seat portion 11 (see details). Figure 13 and Figure 14 The inner plug sleeve 8 has a drain sleeve 81, a gas supply sleeve 82 and a receiving groove 83. The drain sleeve 81 is liquid-tightly inserted into the liquid outlet channel 14, the gas supply sleeve 82 is sleeved on the air inlet end of the gas supply channel 15, and the receiving groove 83 is liquid-tightly engaged with the flow guide sealing part 31.

[0146] Furthermore, such as Figure 5 As shown, the antibacterial filter assembly 61 includes a sleeve core 611 disposed in the air supply channel 15, an antibacterial filter membrane 612 disposed in the sleeve core 611, and a retaining ring 613 that abuts and holds the antibacterial filter membrane 612 in place.

[0147] Furthermore, such as Figure 2 and Figure 5 As shown, an antibacterial element 25 is provided in the drip chamber 23 near the drip orifice 24. Since liquid may remain at the tip of the dropper section 21, the antibacterial element 25 has an antibacterial effect, preventing the growth of microorganisms. The antibacterial element 25 may be a spiral filament made of silver.

[0148] Furthermore, such as Figure 2 , Figure 3 , Figure 5 as well as Figure 6 As shown, in order to protect the dropper head 2 and achieve the dustproof function, the antibacterial eye drop pump head also includes a dust cap 9. The dust cap 9 is detachably covered on the dropper part 21. The top of the dust cap 9 has a sealing protrusion 91 for sealing the dropper hole 24 and an air hole 92 for allowing outside air to flow into the dust cap 9.

[0149] In summary, this invention creates independent gas and liquid pathways, preventing air from flowing back into the storage bottle along the eye drop's path, thus achieving the purpose of bacterial inhibition and gas replenishment. Therefore, this invention effectively overcomes the various shortcomings of existing technologies and has high industrial application value.

[0150] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A bactericidal eye drop pump head, characterized in that, include: A pump head seat (1) is installed on a liquid storage bottle (01). The pump head seat (1) includes a seat body (11), a bottle clamping part (12) provided on one side of the seat body (11), and a guide sliding part (13) provided on the opposite side of the seat body (11). The seat body (11) is provided with a liquid outlet channel (14) and a gas replenishment channel (15) that are both connected to the liquid storage bottle (01). The drip head (2) includes a drip tube part (21) and a pressure-receiving sliding part (22) connected to the drip tube part (21). The drip tube part (21) has a drip chamber (23) that opens toward the pump head seat (1). The top end of the drip tube part (21) is provided with a drip hole (24) that communicates with the drip chamber (23). The pressure-receiving sliding part (22) is slidably sleeved on the guide part (13) in a resettable manner. The piston assembly includes a secondary piston (3) and a main piston (4). The secondary piston (3) includes a flow guiding and sealing part (31) provided in the seat part (11), a manifold part (32) provided in the flow guiding and sealing part (31), and a fixed tube part (33) surrounded by the manifold part (32) and open on one side. The manifold part (32) is connected to the liquid outlet channel (14). The main piston (4) includes a flexible sealing part (41) provided inside the drip head (2) and capable of reset deformation, and a liquid outlet part (42) provided in the flexible sealing part (41) and axially moving in the drip chamber (23) under the drive of the flexible sealing part (41). The liquid outlet part (42) has a liquid release hole (43) at one end near the drip hole (24). The main column (5) includes a snap-fit ​​joint (51) that holds the flexible sealing joint (41) inside the drip head (2). One side of the snap-fit ​​joint (51) is provided with a rod part (52) located in the inner cavity of the liquid outlet section (42). A hydraulic flow channel (53) is formed between the rod part (52) and the liquid outlet section (42). A liquid-tight fit that is released under a preset hydraulic pressure is formed between the end of the rod part (52) and the end of the liquid outlet section (42). The crimping connection (51) has a pull-in post (54) on the opposite side and a sliding tube (55) that surrounds the pull-in post (54) and is open on one side. The sliding tube (55) and the fixed tube (33) are liquid-tightly slidingly fitted to form a liquid storage chamber (56) with variable volume and connected to the manifold (32). The crimping connection (51) is also provided with a flow hole (57) that connects the hydraulic flow channel (53) and the liquid storage chamber (56). The antibacterial and gas-replenishing structure (6) includes an antibacterial filter component (61) and a gas-replenishing one-way valve (62). The antibacterial filter component (61) is installed in the gas-replenishing channel (15), and the gas-replenishing one-way valve (62) is located at the gas outlet of the gas-replenishing channel (15).

2. The antibacterial eye drop pump head according to claim 1, characterized in that: The antibacterial eye drop pump head also includes a reset assembly (7), which includes a first elastic element (71) and a second elastic element (72). The first elastic element (71) is used to reset the drop head (2), and the second elastic element (72) is used to reset the flexible sealing part (41).

3. The antibacterial eye drop pump head according to claim 2, characterized in that: The connection between the flexible sealing part (41) and the liquid outlet part (42) is provided with an annular positioning groove (44); one end of the second elastic member (72) abuts against the annular positioning groove (44) and the other end abuts against the cavity wall of the dripping cavity (23).

4. The antibacterial eye drop pump head according to claim 1, characterized in that: The antibacterial eye drop pump head also includes an inner sleeve (8) that indirectly connects the auxiliary piston (3) to the seat (11). The inner sleeve (8) has a drain sleeve (81), an air supply sleeve (82), and a receiving groove (83). The drain sleeve (81) is liquid-tightly inserted into the liquid outlet channel (14), the air supply sleeve (82) is sleeved on the air inlet end of the air supply channel (15), and the receiving groove (83) is liquid-tightly engaged with the flow guide sealing part (31).

5. The antibacterial eye drop pump head according to claim 1, characterized in that: The antibacterial filter assembly (61) includes a sleeve (611) disposed in the air supply channel (15), an antibacterial filter membrane (612) disposed in the sleeve (611), and a locking ring (613) that abuts and holds the antibacterial filter membrane (612).

6. The antibacterial eye drop pump head according to claim 1, characterized in that: The dripping chamber (23) is provided with an antibacterial element (25) near the dripping hole (24).

7. The antibacterial eye drop pump head according to claim 1, characterized in that: The antibacterial eye drop pump head also includes a dust cap (9), which is detachably covered on the dropper section (21). The top of the dust cap (9) has a sealing protrusion (91) for sealing the drop hole (24) and an air hole (92) for allowing outside air to flow into the dust cap (9).

8. An eye drop delivery device, characterized in that, include: A liquid storage bottle (01) has a bottle mouth (011); The antibacterial eye drop pump head as described in any one of claims 1 to 7, wherein the pump head seat (1) of the antibacterial eye drop pump head is detachably snapped onto the bottle mouth (011); The pressing extension structure (02) is provided on the pressure-receiving sliding part (22) of the drip head (2).

9. The eye drop delivery device according to claim 8, characterized in that: The press extension structure (02) includes a protective press cover (021), which has a clearance hole (022) that allows the dropper part (21) to pass through. The protective press cover (021) is fixedly installed on the pressure sliding part (22). The protective press cover (021) slides with the outer peripheral wall of the liquid storage bottle (01). The protective press cover (021) is provided with a press handle (023).

10. The eye drop delivery device according to claim 8, characterized in that: The press-extend structure (02) includes a protective press cover (021) and a bottle cover (024). The bottle cover (024) is fitted and fixed to a part of the liquid storage bottle (01). The protective press cover (021) has a clearance hole (022) that allows the dropper part (21) to pass through. The protective press cover (021) is fixedly installed on the pressure sliding part (22). The protective press cover (021) and the bottle cover (024) are slidably fitted together, and an anti-detachment structure (025) is provided between the protective press cover (021) and the bottle cover (024).

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