A position adaptive ear canal applicator

Abstract

The utility model relates to medical instrument technical field especially, more particularly to a body position adaptive ear canal dosing device, include: dosing device main part, fixedly set in the one side of dosing device main part's flow guide piece, fixedly set in the inner side wall of the medicine ware main part's air passage and the sealing plug of cover set in the outer surface of flow guide piece, wherein, dosing device main part includes: medicine inlet flow guide head and fixedly set in the bottom of medicine inlet flow guide head's medicine storage bin, the inside of medicine inlet flow guide head has medicine liquid passage, and the head end of medicine liquid passage communicates with outside environment, and the head end of medicine liquid passage detachably is provided with sealing cover, the body position adaptive ear canal dosing device of the utility model solves the body position dependent problem, and patient specific body position is not needed, and children, the disabled can also independently dose, and the dose is accurate.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a position-adaptive ear canal delivery device. Background Technology

[0002] Ear drops are a common method of medication administration in the treatment of ear diseases. However, existing ear drop methods have many problems. Most existing ear drops are packaged in individual bottles, and patients need to put the liquid into the external auditory canal themselves or with the assistance of others. In addition, patients need to keep their heads at a specific tilt angle (usually ≥30°) to complete the administration, rinsing, and soaking operations.

[0003] During drug administration, the patient's head must be tilted to allow the medication to penetrate; during immersion, the patient's head must also be tilted, typically for 5-10 minutes; and during rinsing, a specialized ear canal irrigation syringe and needle are required, which is difficult for inexperienced personnel to perform independently. This traditional method of drug administration has the following problems:

[0004] Position dependence: Patients, especially children and those with limited mobility, often find it difficult to perform the standard ear drop application procedure independently, leading to leakage of the medication and resulting in dosage loss. This is because current ear drop methods require strict head positioning, and some patients cannot maintain the correct position for extended periods, preventing the medication from fully entering the ear canal and remaining there for a sufficient time, thus affecting its efficacy.

[0005] Pressure imbalance: When the medication is instilled, air in the ear canal cannot be effectively expelled, creating interference between the gas and liquid phases, preventing the medication from fully entering the ear canal. When the medication is instilled, the air inside the ear canal cannot escape smoothly, creating a certain pressure that hinders the medication's entry and prevents it from being evenly distributed within the ear canal, thus affecting the treatment effect.

[0006] Hygiene risks: Reused droppers come into contact with ear canal secretions, posing a risk of cross-infection. During repeated use of ear drops, if the dropper is not thoroughly cleaned and disinfected after contact with ear canal secretions, it can easily lead to the spread of pathogens such as bacteria and viruses between different patients, causing cross-infection.

[0007] Operational error: Traditional drug delivery methods lack dosage control. Without a precise dosage control device, patients find it difficult to accurately control the amount of medication instilled, potentially resulting in too much or too little medication being administered. Too much medication may lead to waste and excessively high concentrations in the ear canal, while too little may fail to achieve an effective therapeutic concentration, thus affecting the treatment outcome. Utility Model Content

[0008] The purpose of this invention is to address the shortcomings of existing technologies by providing a position-adaptive ear canal delivery device.

[0009] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0010] A position-adaptive ear canal drug delivery device includes: a flow guide fixedly disposed on one side of the drug delivery device body, an air channel fixedly disposed on the inner wall of the drug delivery device body, and a sealing plug sleeved on the outer surface of the flow guide.

[0011] The main body of the drug delivery device includes: a drug inlet guide head and a drug storage chamber fixedly disposed at the bottom of the drug inlet guide head;

[0012] The inside of the drug inlet guide head has a drug inlet channel, the head end of which is connected to the external environment, and the head end of the drug inlet channel is detachably equipped with a sealing cap.

[0013] The interior of the medicine storage chamber has a liquid storage cavity, one side of which is connected to the end of the medicine inlet channel, and a filter screen is fixedly installed along the side wall of the liquid storage cavity;

[0014] The guide includes: a rigid conduit fixedly disposed on one side of the drug storage chamber, and a flexible conduit fixedly disposed on the side of the rigid conduit away from the drug storage chamber.

[0015] The head end of the rigid catheter is connected to the reservoir, and the tail end of the rigid catheter is connected to the flexible catheter.

[0016] The sealing plug has a through hole along its axial direction. The sealing plug is sleeved on the outer surface of the rigid conduit through the through hole. The axis of the sealing plug is coaxial with the axis of the rigid conduit.

[0017] The end of the air channel is connected to the liquid storage chamber, and the beginning of the air channel passes through the side wall of the drug storage compartment and the sealing plug in sequence, and then connects to the external environment.

[0018] Furthermore, a one-way valve is fixedly installed in the air passage; the inner diameter of the air passage is 0.2mm-5mm.

[0019] Furthermore, the air channel includes: a first air return channel fixedly disposed on the inner wall of the drug inlet guide head, a second air return channel fixedly disposed on the inner wall of the drug storage chamber, and a third air return channel fixedly disposed on the outer surface of the rigid conduit.

[0020] The end of the first air return channel is connected to the liquid storage chamber, and the axis of the first air return channel is parallel to the axis of the drug inlet channel.

[0021] The end of the second air return channel is connected to the beginning of the first air return channel, and the end of the third air return channel is connected to the beginning of the second air return channel. The beginning of the third air return channel passes through the side wall of the drug storage compartment and the sealing plug in sequence and then connects to the external environment.

[0022] Furthermore, the outer surface of the medicine storage compartment is fixedly provided with anti-slip ripples.

[0023] Furthermore, a dust cover is detachably fitted onto the outer surface of the soft catheter.

[0024] Furthermore, the hardness of the sealing plug is Shore hardness 15A-25A;

[0025] The sealing plug is conical with a cone angle of 15°±2°, and the cone angle of the sealing plug faces the side of the soft catheter.

[0026] The length of the sealing plug is 3mm-13mm, and the radial deformation of the sealing plug is 0.5mm-3mm.

[0027] Furthermore, both the inner walls of the rigid catheter and the inner walls of the flexible catheter are covered with a polytetrafluoroethylene layer.

[0028] Furthermore, the filter screen is a gradient filter screen, which can be a single-layer filter screen or a multi-layer filter screen;

[0029] The pore size of a single-layer filter screen is 10μm-1000μm;

[0030] The multi-layer filter includes an outer filter, a middle filter, and an inner filter. The pore size of the outer filter is 10μm-300μm, the pore size of the middle filter is 300μm-600μm, and the pore size of the inner filter is 1μm-10μm.

[0031] Furthermore, the drug storage chamber is made of transparent PC material, the volume of the liquid storage cavity is 1mL-10mL, and the outer surface of the drug storage chamber is provided with a dosage line.

[0032] Furthermore, the sealing plug is made of silicone or polyurethane.

[0033] The present invention adopts the above technical solution and has the following technical effects compared with the prior art:

[0034] This novel position-adaptive ear canal drug delivery device solves the problem of position dependence, eliminating the need for specific patient positions. Children and those with mobility impairments can administer medication independently with accurate dosage. The air channel and one-way valve design balance the air pressure inside and outside the ear canal, avoiding interference from gas-liquid two-phase flow. This allows the medication to fully and evenly enter all parts of the ear canal, increasing the contact area between the drug and the lesion and enhancing the therapeutic effect. The sealing plug design not only fits tightly to the ear canal to prevent medication leakage but also adapts to different ear canal sizes, avoiding pain or discomfort caused by excessive sealing. It also effectively blocks external dust, bacteria, and other contaminants from entering the ear canal, protecting the ear canal environment and preventing cross-infection, making medication administration safer. The dosage line in the drug reservoir reduces operational errors and facilitates precise dosage control. The design of the flexible catheter, conforming to the curvature of the ear canal, enhances ease of use, providing high comfort and simple operation. The filter ensures the purity of the medication, preventing impurities from irritating the ear canal or affecting efficacy. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the structure of this utility model;

[0036] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0037] Figure 3 This is a diagram showing the flow of the liquid medicine and air in this invention.

[0038] Figure 4 This is a schematic diagram of the sealing plug in this utility model;

[0039] Figure 5 This is a schematic diagram of the structure of the dust cover in this utility model;

[0040] The reference numerals in the attached figures are:

[0041] 1. Drug delivery device body; 2. Flow guide; 6. Air channel; 3. Sealing plug; 11. Drug inlet guide head; 12. Drug storage chamber; 13. Sealing cover; 121. Filter screen; 21. Rigid tubing; 22. Soft tubing; 5. One-way valve; 111. First air return channel; 112. Second air return channel; 113. Third air return channel; 122. Anti-slip corrugations; 4. Dust cover. Detailed Implementation

[0042] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0043] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0044] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention.

[0045] Example 1

[0046] This embodiment provides a position-adaptive ear canal drug delivery device, as shown in the attached figure. Figures 1 to 2 As shown, it includes: a drug delivery device body 1, a flow guide 2 fixedly disposed on one side of the drug delivery device body 1, an air channel 6 fixedly disposed on the inner side wall of the drug delivery device body 1, and a sealing plug 3 sleeved on the outer surface of the flow guide 2.

[0047] The drug delivery device body 1 includes: a drug inlet guide head 11 and a drug storage chamber 12 fixedly disposed at the bottom of the drug inlet guide head 11;

[0048] The inside of the drug inlet guide head 11 has a drug inlet channel. The head end of the drug inlet channel is connected to the external environment. The head end of the drug inlet channel is detachably equipped with a sealing cap 13, which can prevent the drug liquid from evaporating or becoming contaminated when not in use.

[0049] The medicine storage chamber 12 has a liquid storage cavity inside. One side of the liquid storage cavity is connected to the end of the medicine inlet channel. A filter screen 121 is fixedly provided along the side wall of the liquid storage cavity. The filter screen 121 is used to filter impurities in the medicine liquid to ensure the purity of the medicine liquid.

[0050] The drug storage chamber 12 is made of transparent PC material, the volume of the liquid storage cavity is 2mL, the outer surface of the drug storage chamber 12 is provided with a dosage line to facilitate accurate control of the drug dosage; the outer surface of the drug storage chamber 12 is fixedly provided with anti-slip ripples 122.

[0051] The guide member 2 includes: a rigid conduit 21 fixedly disposed on one side of the drug storage chamber 12, and a flexible conduit 22 fixedly disposed on the side of the rigid conduit 21 away from the drug storage chamber 12.

[0052] The head end of the rigid conduit 21 is connected to the liquid storage cavity, and the tail end of the rigid conduit 21 is connected to the flexible conduit 22.

[0053] The outer surface of the flexible conduit 22 is detachably fitted with a dust cover; the inner walls of both the rigid conduit 21 and the flexible conduit 22 are covered with a polytetrafluoroethylene layer, which gives the inner walls of the rigid conduit 21 and the flexible conduit 22 good lubricity and chemical stability, reducing the resistance and adsorption of the drug solution during the flow process; the inner diameter of both the rigid conduit 21 and the flexible conduit 22 is 0.6 mm; the proximal end of the flexible conduit 22 has an arc of 25°.

[0054] The sealing plug 3 has a through hole along its axial direction. The sealing plug 3 is sleeved on the outer surface of the rigid conduit 21 through the through hole. The axis of the sealing plug 3 is coaxial with the axis of the rigid conduit 21. The sealing plug 3 is made of silicone and has a Shore hardness of 15A. The sealing plug 3 is conical with a cone angle of 15°, and the cone angle of the sealing plug 3 faces the side of the flexible conduit 22. The length of the sealing plug 3 is 12mm, and the radial deformation of the sealing plug 3 is 2mm.

[0055] The end of the air channel 6 is connected to the liquid storage chamber, and the head end of the air channel 6 passes through the side wall of the drug storage chamber 12 and the sealing plug 3 in sequence before communicating with the external environment; a one-way valve 5 is fixedly installed in the air channel 6; the inner diameter of the air channel 6 is 0.3 mm; the air channel 6 includes: a first air return channel 111 fixedly installed on the inner side wall of the drug inlet guide head 11, a second air return channel 112 fixedly installed on the inner side wall of the drug storage chamber 12, and a third air return channel 113 fixedly installed on the outer surface of the rigid conduit 21;

[0056] Wherein, the end of the first air return channel 111 is connected to the liquid storage chamber, and the axis of the first air return channel 111 is parallel to the axis of the drug inlet channel;

[0057] The end of the second air return channel 112 is connected to the head of the first air return channel 111, and the end of the third air return channel 113 is connected to the head of the second air return channel 112. The head of the third air return channel 113 passes through the side wall of the medicine storage chamber 12 and the sealing plug 3 in sequence and then connects to the external environment. This design can effectively balance the air pressure inside and outside the ear canal, avoid the formation of gas-liquid two-phase flow interference when the medicine is dripped in, and ensure that the medicine fully enters the ear canal.

[0058] The filter 121 is a gradient filter, and the gradient filter is a single-layer filter.

[0059] In a preferred embodiment, the single-layer filter screen is a single-layer ceramic filter element, and the pore size of the single-layer ceramic filter element is 10μm;

[0060] Example 2

[0061] This embodiment provides a position-adaptive ear canal drug delivery device, as shown in the attached figure. Figures 1 to 2 As shown, it includes: a drug delivery device body 1, a flow guide 2 fixedly disposed on one side of the drug delivery device body 1, an air channel 6 fixedly disposed on the inner side wall of the drug delivery device body 1, and a sealing plug 3 sleeved on the outer surface of the flow guide 2.

[0062] The drug delivery device body 1 includes: a drug inlet guide head 11 and a drug storage chamber 12 fixedly disposed at the bottom of the drug inlet guide head 11;

[0063] The inside of the drug inlet guide head 11 has a drug inlet channel. The head end of the drug inlet channel is connected to the external environment. The head end of the drug inlet channel is detachably equipped with a sealing cap 13, which can prevent the drug liquid from evaporating or becoming contaminated when not in use.

[0064] The medicine storage chamber 12 has a liquid storage cavity inside. One side of the liquid storage cavity is connected to the end of the medicine inlet channel. A filter screen 121 is fixedly provided along the side wall of the liquid storage cavity. The filter screen 121 is used to filter impurities in the medicine liquid to ensure the purity of the medicine liquid.

[0065] The drug storage chamber 12 is made of transparent PC material, the volume of the liquid storage cavity is 3mL, the outer surface of the drug storage chamber 12 is provided with a dosage line to facilitate accurate control of the drug dosage; the outer surface of the drug storage chamber 12 is fixedly provided with anti-slip ripples 122.

[0066] The guide member 2 includes: a rigid conduit 21 fixedly disposed on one side of the drug storage chamber 12, and a flexible conduit 22 fixedly disposed on the side of the rigid conduit 21 away from the drug storage chamber 12.

[0067] The head end of the rigid conduit 21 is connected to the liquid storage cavity, and the tail end of the rigid conduit 21 is connected to the flexible conduit 22.

[0068] The outer surface of the flexible conduit 22 is detachably fitted with a dust cover; the inner walls of both the rigid conduit 21 and the flexible conduit 22 are covered with a polytetrafluoroethylene layer, which gives the inner walls of the rigid conduit 21 and the flexible conduit 22 good lubricity and chemical stability, reducing the resistance and adsorption of the drug solution during the flow process; the inner diameter of both the rigid conduit 21 and the flexible conduit 22 is 0.6 mm; the proximal end of the flexible conduit 22 has a curvature of 30°;

[0069] The sealing plug 3 has a through hole along its axial direction. The sealing plug 3 is sleeved on the outer surface of the rigid conduit 21 through the through hole. The axis of the sealing plug 3 is coaxial with the axis of the rigid conduit 21. The sealing plug 3 is made of polyurethane and has a Shore hardness of 25A. The sealing plug 3 is conical with a cone angle of 15°, and the cone angle of the sealing plug 3 faces the side of the flexible conduit 22. The length of the sealing plug 3 is 13mm, and the radial deformation of the sealing plug 3 is 3mm.

[0070] The end of the air channel 6 is connected to the liquid storage chamber, and the head end of the air channel 6 passes through the side wall of the drug storage chamber 12 and the sealing plug 3 in sequence before communicating with the external environment; a one-way valve 5 is fixedly installed in the air channel 6; the inner diameter of the air channel 6 is 0.3mm ± 0.02mm; the air channel 6 includes: a first air return channel 111 fixedly installed on the inner side wall of the drug inlet guide head 11, a second air return channel 112 fixedly installed on the inner side wall of the drug storage chamber 12, and a third air return channel 113 fixedly installed on the outer surface of the rigid conduit 21;

[0071] Wherein, the end of the first air return channel 111 is connected to the liquid storage chamber, and the axis of the first air return channel 111 is parallel to the axis of the drug inlet channel;

[0072] The end of the second air return channel 112 is connected to the head of the first air return channel 111, and the end of the third air return channel 113 is connected to the head of the second air return channel 112. The head of the third air return channel 113 passes through the side wall of the medicine storage chamber 12 and the sealing plug 3 in sequence and then connects to the external environment. This design can effectively balance the air pressure inside and outside the ear canal, avoid the formation of gas-liquid two-phase flow interference when the medicine is dripped in, and ensure that the medicine fully enters the ear canal.

[0073] The filter screen 121 is a gradient filter screen, and the gradient filter screen is a multi-layer filter screen;

[0074] The multi-layer filter includes an outer filter, a middle filter, and an inner filter. The outer filter has a pore size of 15 μm, the middle filter has a pore size of 300 μm, and the inner filter has a pore size of 5 μm. This multi-layer filter performs multi-stage fine filtration of the medication, ensuring the purity of the medication entering the ear canal, reducing irritation from impurities, lowering the risk of inflammation or other adverse reactions caused by impurities, and improving the safety of treatment.

[0075] In this embodiment of the position-adaptive ear canal delivery device, the medication is first injected into the reservoir chamber of the storage tank 12 through the medication inlet channel of the inlet head 11. Then, the sealing cap 13 is closed. Next, the soft catheter 22 of the guide member 2 is gently inserted into the patient's ear canal, and the sealing plug 3 is made to fit the ear canal. Because the soft catheter 22 has a certain curvature and flexibility, it can fit the ear canal well, without requiring the patient's head to maintain a specific tilt angle. By squeezing the storage tank 12, the medication sequentially passes through the rigid catheter 21 and the soft catheter 22 into the ear canal. During the medication administration process, the air channel 6 is opened by the first air return... It consists of a first air inlet channel 111, a second air return channel 112, and a third air return channel 113, with an inner diameter of about 0.3 mm. It is equipped with a one-way valve inside, which can effectively expel air from the ear canal during drug administration, balance the air pressure inside and outside the ear canal, avoid interference between gas and liquid two-phase flow, and allow the drug solution to fully and evenly enter all parts of the ear canal, increase the contact area between the drug and the lesion, enhance the therapeutic effect, and complete the drug administration operation. After the drug administration is completed, a dust cover can be put on the outer surface of the soft catheter 22 to prevent contamination. The whole drug administration process is simple and convenient to operate, reducing patient discomfort and operation difficulty, and improving the accuracy and safety of drug administration.

[0076] In summary, this novel position-adaptive ear canal drug delivery device solves the problem of position dependence, eliminating the need for a specific patient position. Children and those with mobility impairments can administer medication independently, ensuring accurate dosage. The air channel and one-way valve design balance the air pressure inside and outside the ear canal, avoiding interference from gas-liquid two-phase flow. This allows the medication to fully and evenly enter all parts of the ear canal, increasing the contact area between the drug and the lesion and enhancing the therapeutic effect. The sealing plug design not only fits tightly to the ear canal to prevent medication leakage but also adapts to different ear canal sizes, avoiding pain or discomfort caused by excessive sealing. It also effectively blocks external dust, bacteria, and other contaminants from entering the ear canal, protecting the ear canal environment, preventing cross-infection, and making medication administration safer. The dosage line in the drug reservoir reduces operational errors and facilitates precise dosage control. The curved design of the soft catheter that conforms to the ear canal enhances ease of use, providing high comfort and simple operation. The filter ensures the purity of the medication, preventing impurities from irritating the ear canal or affecting efficacy.

[0077] The above description is only a preferred embodiment of the present utility model and does not limit the implementation method and protection scope of the present utility model. Those skilled in the art should realize that all solutions obtained by equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A body position adaptive ear canal applicator, characterized by, include: The device includes a main body (1), a guide (2) fixedly disposed on one side of the main body (1), an air channel (6) fixedly disposed on the inner wall of the main body (1), and a sealing plug (3) sleeved on the outer surface of the guide (2). The drug delivery device body (1) includes: a drug inlet guide head (11) and a drug storage chamber (12) fixedly disposed at the bottom of the drug inlet guide head (11); The inside of the drug inlet guide head (11) has a drug inlet channel, the head end of the drug inlet channel is connected to the external environment, and the head end of the drug inlet channel is detachably provided with a sealing cap (13); The medicine storage chamber (12) has a liquid storage cavity inside. One side of the liquid storage cavity is connected to the end of the medicine inlet channel. A filter screen (121) is fixedly provided along the side wall of the liquid storage cavity. The guide (2) includes: a rigid conduit (21) fixedly disposed on one side of the drug storage chamber (12), and a flexible conduit (22) fixedly disposed on the side of the rigid conduit (21) away from the drug storage chamber (12); The head end of the rigid conduit (21) is connected to the liquid storage cavity, and the end end of the rigid conduit (21) is connected to the flexible conduit (22). The sealing plug (3) has a through hole along its axial direction. The sealing plug (3) is sleeved on the outer surface of the rigid conduit (21) through the through hole. The axis of the sealing plug (3) is coaxial with the axis of the rigid conduit (21). The end of the air channel (6) is connected to the liquid storage chamber, and the head end of the air channel (6) passes through the side wall of the drug storage chamber (12) and the sealing plug (3) in sequence before being connected to the external environment.

2. A body position adaptive ear canal applicator according to claim 1, wherein, A one-way valve (5) is fixedly installed in the air passage (6); the inner diameter of the air passage (6) is 0.2mm-5mm.

3. A body position adaptive ear canal applicator according to claim 2, wherein, The air channel (6) includes: a first air return channel (111) fixedly disposed on the inner side wall of the drug inlet guide head (11), a second air return channel (112) fixedly disposed on the inner side wall of the drug storage chamber (12), and a third air return channel (113) fixedly disposed on the outer surface of the rigid conduit (21). Wherein, the end of the first air return channel (111) is connected to the liquid storage chamber, and the axis of the first air return channel (111) is parallel to the axis of the drug inlet channel; The end of the second air return channel (112) is connected to the head of the first air return channel (111), and the end of the third air return channel (113) is connected to the head of the second air return channel (112). The head of the third air return channel (113) passes through the side wall of the medicine storage chamber (12) and the sealing plug (3) in sequence and then connects to the external environment.

4. A body position adaptive ear canal applicator according to claim 1, wherein, The outer surface of the medicine storage compartment (12) is fixedly provided with anti-slip ripples (122).

5. A body position adaptive ear canal applicator according to claim 1, wherein, The outer surface of the flexible conduit (22) is detachably fitted with a dust cover (4).

6. A body position adaptive ear canal applicator according to claim 1, wherein, The hardness of the sealing plug (3) is Shore 15A-25A; The sealing plug (3) is conical, the taper angle of the sealing plug (3) is 15°±2°, and the vertex angle of the sealing plug (3) is towards one side of the soft catheter (22); The length of the sealing plug (3) is 3mm-13mm, and the radial deformation of the sealing plug (3) is 0.5mm-3mm.

7. A body position adaptive ear canal applicator according to claim 1, wherein, The inner wall of the hard catheter (21) and the inner wall of the soft catheter (22) are both covered with a polytetrafluoroethylene layer.

8. A body position adaptive ear canal applicator according to claim 1, wherein, The filter screen (121) is a gradient filter screen, which is a single-layer filter screen or a multi-layer filter screen. The pore size of the single-layer filter screen is 10um-1000um. The multi-layer filter screen comprises an outer layer filter screen, a middle layer filter screen and an inner layer filter screen, the pore size of the outer layer filter screen is 10um-300um, the pore size of the middle layer filter screen is 300um-600um, and the pore size of the inner layer filter screen is 1um-10um.

9. A body position adaptive ear canal applicator according to claim 1, wherein, The storage bin (12) is made of transparent PC material, the volume of the storage cavity is 1mL-10mL, and the outer surface of the storage bin (12) is provided with a dose line.

10. A body position adaptive ear canal applicator according to claim 1, wherein, The sealing plug (3) is made of silica gel material or polyurethane material.

Images