An otolaryngological administration device

Abstract

The application relates to the technical field of medical devices, and discloses an ear-nose-throat drug delivery device, which comprises a drug delivery cylinder, the inside of the drug delivery cylinder is provided with a piston and a drug outlet nozzle, the inside of the piston is provided with a push rod, the side, away from the piston, of the push rod is provided with a disc, a connecting rod is fixedly connected between the piston and the disc, the outer walls of the push rod and the connecting rod are provided with a quantitative disc, an L-shaped groove is arranged in the inside of the quantitative disc, a magnetic block one is fixedly connected to the inner wall of the L-shaped groove, a hollow cylinder is slidably connected to the inside of the drug delivery cylinder, and one end of a tension spring is fixedly connected to the inner top wall of the hollow cylinder. By pushing the disc, the magnetic block one magnetically attracts a magnetic block two, the hollow cylinder is slid in the inside of the drug delivery cylinder, the quantitative disc is limited, the quantitative drug delivery of the drug delivery cylinder is realized, the drug dose entering the ear, nose or throat cavity is kept consistent, and the drug delivery amount is prevented from being too much or insufficient due to different pressing forces or operation habits.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to an ear, nose, and throat drug delivery device. Background Technology

[0002] In the clinical diagnosis and treatment of ear, nose and throat diseases, it is usually necessary to apply the medication directly to the local lesions such as the ear canal, nasal cavity, or pharynx to improve the targeting and speed of action of the treatment. Currently, most commonly used ear, nose and throat medication delivery devices rely on manual pressing or simple push structures to expel the medication. The dosage is mainly affected by factors such as the operator's pressing force, pushing stroke, and operating habits, making it difficult to achieve stable quantitative control and easily resulting in excessive or insufficient dosage in a single administration.

[0003] A search revealed an ENT medication delivery device in publication number CN114733053B, belonging to the field of medical device technology. This ENT medication delivery device includes an injection tube, a cannula, and a capsule. One end of the injection tube has a nozzle on its side wall, and its outer wall has a spiral groove. The cannula is fitted onto the injection tube, and a slider is fixedly installed on its inner wall, slidably connected to the groove. The capsule surrounds the outer wall of the injection tube and is fixedly connected to a first annular plate. The inner wall of the first annular plate is fixedly connected to the side wall of the other end of the injection tube, and the inner cavity of the capsule is connected to the inner cavity of the injection tube via a curved tube. The capsule is filled with medication. This ENT medication delivery device ensures that the medication is evenly sprayed onto the side wall of the cavity at the affected area. Pressing the capsule stops when the nozzle is removed from the cavity, allowing doctors to accurately predict when to stop pressing the capsule, avoiding medication waste and improving the patient's medication experience.

[0004] In the above-mentioned application, the operator first needs to control the pressure of the bladder while coordinating the injection tube to rotate along the spiral trajectory and withdraw from the cavity of the affected area. The operation steps are relatively complicated. Secondly, the drug administration process is still mainly based on experience judgment. The dosage is still affected by the operator's pressure, duration and operating habits, making it difficult to ensure the consistency of the single drug dosage, which is not conducive to achieving standardization and repeatable drug administration. Summary of the Invention

[0005] The purpose of this invention is to solve the problems mentioned in the background art and to propose an ear, nose, and throat drug delivery device. This invention pushes a disc, which, via a connecting rod, moves a piston inside the drug delivery cylinder, thereby pushing the liquid medication inside the cylinder. This loosens the sealing mechanism, allowing medication to be delivered through a dispensing nozzle. A metering disc is used; when the disc reaches the appropriate position, magnetic blocks one and two magnetic blocks attract each other, causing the hollow cylinder to slide inside the drug delivery cylinder and into the inner wall of the L-shaped groove, thus limiting the metering disc. This achieves quantitative drug delivery, ensuring a consistent dosage of medication entering the ear, nose, or throat cavity. It avoids over- or under-dosage due to differences in pressure or operating habits, thereby improving the accuracy and repeatability of drug delivery. Simultaneously, quantitative delivery effectively reduces spillage and ineffective spraying, minimizing drug waste.

[0006] The technical solution adopted by this invention to solve its technical problem is:

[0007] An ear, nose, and throat drug delivery device includes a drug delivery cylinder. Inside the drug delivery cylinder are a piston and a dispensing nozzle. Inside the piston is a push rod. A disc is located on the side of the push rod away from the piston. A connecting rod is fixedly connected between the piston and the disc. A metering disc is provided on the outer wall of both the push rod and the connecting rod. An L-shaped groove is formed inside the metering disc. A magnetic block is fixedly connected to the inner wall of the L-shaped groove. A hollow cylinder is slidably connected inside the drug delivery cylinder. One end of a tension spring is fixedly connected to the inner top wall of the hollow cylinder, and the other end of the tension spring is fixedly connected to the inner bottom wall of the drug delivery cylinder. A second magnetic block is fixedly connected inside the hollow cylinder. The magnetic attraction between the second magnetic block and the first magnetic block is achieved. A sealing mechanism is provided inside the drug delivery cylinder.

[0008] The above solution involves extending a portion of the medication cartridge near the dispensing nozzle for easy connection. The nozzle is designed for convenient insertion into the patient's ear, nose, and throat. The cartridge is hollow, allowing a piston to slide inside. When medication is loaded, a sealing mechanism prevents leakage from the nozzle. The piston, positioned inside the cartridge, pushes a disc, which, via a connecting rod, moves the piston, creating a pressure change within the cartridge. This releases the seal on the nozzle, allowing medication to be dispensed. Multiple metering discs are provided for the metered dispensing of medication from the cartridge.

[0009] Preferably, the sealing mechanism includes a conical block, the outer wall of which is disposed inside the administration cartridge, and a sealing ring is fixedly connected to the outer wall of the conical block, the outer wall of which is disposed inside the administration cartridge.

[0010] Preferably, a limiting rod is fixedly connected to the side of the conical block away from the drug delivery cylinder, and a fixing plate is slidably connected to the outer wall of the limiting rod.

[0011] Preferably, the outer wall of the fixing plate is fixedly connected to the inside of the drug delivery cylinder, and one end of the spring is fixedly connected to the side of the fixing plate near the conical block, while the other end of the spring is fixedly connected to the conical block.

[0012] Preferably, the push rod has multiple grooves inside, and the grooves are arranged in a spiral.

[0013] Preferably, the inner wall of the chute is provided with a circular block, and the outer wall of the circular block is fixedly connected to the inside of the metering disc.

[0014] Preferably, the disk has multiple limiting grooves inside, which are arranged in a ring.

[0015] Preferably, the inner wall of the limiting groove is provided with a T-shaped rod, and the outer wall of the T-shaped rod is slidably connected with a handle.

[0016] Preferably, the outer wall of the handle is fixedly connected to the outer wall of the push rod, and the handle is T-shaped.

[0017] Preferably, one end of the second spring is fixedly connected to the outer wall of the T-shaped rod, and the other end of the second spring is fixedly connected to the outer wall of the handle.

[0018] Working principle: First, remove the piston and its connecting parts from the inside of the administration cartridge. Place the liquid medicine inside the administration cartridge and seal it to prevent the liquid medicine from leaking out when not in use. Then, install the piston and its connecting parts back into the administration cartridge, positioning the dispensing nozzle at the patient's ear, nose, or throat. By pushing the disc through the connecting rod, the piston moves. The movement of the piston changes the internal pressure of the administration cartridge. The sealing mechanism no longer seals the dispensing nozzle and the administration cartridge, facilitating drug administration through the dispensing nozzle. With the setting of magnetic block two, when the metering disc moves to the appropriate position, magnetic block one will attract magnetic block two, causing the hollow cylinder to slide upwards into the inner wall of the L-shaped groove, thereby limiting the metering disc. Multiple metering discs are set to facilitate quantitative drug administration.

[0019] In summary, this application has the following beneficial effects:

[0020] 1. This invention pushes a disc, which, via a connecting rod, moves a piston inside the administration cartridge, thereby moving the liquid medicine inside the cartridge. This loosens the sealing mechanism, allowing the medicine to be administered through a dispensing nozzle. A metering disc is used; when the disc reaches the appropriate position, magnetic blocks one and two magnetic blocks attract each other, causing the hollow cylinder to slide inside the administration cartridge and into the inner wall of the L-shaped groove, thus limiting the metering disc. This achieves precise drug delivery, ensuring a consistent dosage of medication entering the ear, nose, or throat cavity. It avoids over- or under-dosage due to varying pressure or operating habits, improving the accuracy and repeatability of drug administration. Furthermore, precise metering effectively reduces spillage and ineffective spraying, minimizing drug waste.

[0021] 2. In this invention, the liquid medicine is pushed by the piston, which pushes the conical block, causing the spring to compress it. The conical block causes the sealing ring to separate from the inside of the drug delivery cylinder, facilitating the discharge of the liquid medicine. When the piston stops pushing the liquid medicine, the elastic force of the spring causes the conical block and the sealing ring to reset, thereby sealing the drug delivery cylinder and the drug dispensing nozzle. This prevents leakage or dripping of the liquid medicine when not being used for drug delivery, avoids residual liquid medicine contaminating the device or the patient's skin, makes the drug delivery process more stable and controllable, and improves the safety of drug use.

[0022] 3. This invention uses multiple sliding grooves, circular blocks, and metering discs arranged in a regular pattern. By pulling out the T-shaped rod, the second spring is compressed. After the T-shaped rod slides out of the inner wall of the limiting groove on the side near the disc, it no longer limits the handle. By rotating the handle, the sliding groove and push rod rotate. The channel structure of the sliding groove causes multiple metering discs to move towards the disc. At the same time, due to the different distances of the multiple L-shaped grooves, the spacing between the multiple metering discs can be adjusted, realizing multi-level adjustment of the drug dosage to adapt to different usage scenarios. In addition, this structure can complete the coordinated movement of multiple discs without additional driving components, which helps to simplify the mechanical structure.

[0023] 4. The present invention enhances the sealing effect through the conical structure of the conical block, and can move slightly under the action of drug pressure to ensure that the drug is sprayed out smoothly and then quickly resets the seal. The sealing ring is fixed to the outer wall of the conical block and fits tightly with the inside of the drug delivery cylinder, further enhancing the sealing performance and preventing the drug from leaking from the gap between the conical block and the drug delivery cylinder.

[0024] 5. In this invention, a fixing plate is fixed inside the drug delivery cartridge, serving as the mounting carrier for spring one and defining the elastic extension and contraction direction of spring one. Spring one is fixed at both ends to the fixing plate and the conical block respectively, providing elastic restoring force to the conical block. After the drug is sprayed out, it pushes the conical block to quickly return to its original position, re-fitting the inside of the drug delivery cartridge to achieve a seal and prevent subsequent drug leakage. Attached Figure Description

[0025] Figure 1This is a three-dimensional schematic diagram of the present invention;

[0026] Figure 2 This is a cross-sectional schematic diagram of the internal structure of the drug delivery cartridge of the present invention;

[0027] Figure 3 This is a partial structural diagram of the magnetic block of the present invention;

[0028] Figure 4 This is a cross-sectional schematic diagram of the internal structure of the hollow cylinder of the present invention;

[0029] Figure 5 This is a partial structural diagram of the hollow cylinder of the present invention;

[0030] Figure 6 This is a partial structural diagram of the limiting rod of the present invention;

[0031] Figure 7 This is a schematic diagram of a partial structure of the disk of the present invention;

[0032] Figure 8 This is a schematic diagram of a partial structure of the circular block according to the present invention.

[0033] in:

[0034] 1. Dosing cartridge; 2. Piston; 3. Push rod; 4. Disc; 5. Connecting rod; 6. Metering disc; 7. L-shaped groove; 8. Magnetic block one; 9. Hollow cylinder; 10. Tension spring; 11. Magnetic block two; 12. Dispensing nozzle;

[0035] 13. Sealing mechanism; 131. Conical block; 132. Sealing ring;

[0036] 14. Limiting rod; 15. Fixing plate; 16. Spring 1; 17. Slide groove; 18. Round block; 19. Handle; 20. Limiting groove; 21. T-shaped rod; 22. Spring 2. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] like Figures 1-5As shown, this embodiment of the invention provides an ear, nose, and throat drug delivery device, including a drug delivery cylinder 1. A piston 2 and a drug dispensing nozzle 12 are disposed inside the drug delivery cylinder 1. A push rod 3 is disposed inside the piston 2. A disc 4 is disposed on the side of the push rod 3 away from the piston 2. A connecting rod 5 is fixedly connected between the piston 2 and the disc 4. A metering disc 6 is disposed on the outer wall of both the push rod 3 and the connecting rod 5. An L-shaped groove 7 is formed inside the metering disc 6. A magnetic block 8 is fixedly connected to the inner wall of the L-shaped groove 7. A hollow cylinder 9 is slidably connected inside the drug delivery cylinder 1. One end of a tension spring 10 is fixedly connected to the inner top wall of the hollow cylinder 9. The other end of the tension spring 10 is fixedly connected to the inner bottom wall of the drug delivery cylinder 1. A second magnetic block 11 is fixedly connected inside the hollow cylinder 9. The magnetic attraction between the second magnetic block 11 and the first magnetic block 8 is achieved. A sealing mechanism 13 is disposed inside the drug delivery cylinder 1.

[0039] Specifically, the drug delivery cylinder 1 serves as the core support of the device, housing the drug, piston 2, and its connecting components. It provides a closed space for the drug delivery process and defines the installation and movement trajectory of each component. Piston 2 slides inside the drug delivery cylinder 1, and its axial movement compresses the drug within, causing it to be ejected from the dispensing nozzle 12. A disc 4 is fixed to the end of the connecting rod 5 furthest from piston 2, facilitating the locking of the push rod 3 through the cooperation of the disc 4 and connecting components, preventing accidental rotation of the push rod 3 during drug delivery. A metering disc 6 is fitted onto the outer wall of the push rod 3 and connecting rod 5. Through the cooperation of an L-shaped groove 7 and magnetic block 8, combined with the magnetic adsorption of magnetic block 11, the dosage is positioned. The L-shaped groove 7 provides an installation position for magnetic block 8, and its channel structure guides the adsorption and separation of magnetic block 8 and magnetic block 11. Combined with the axial movement of the metering disc 6, it facilitates observation of the metered drug dispensing from the drug delivery cylinder 1. 8 and magnetic block 11 are attracted by magnetism, so that hollow cylinder 9 forms a locking force on metering disc 6, ensuring that metering disc 6 does not move arbitrarily after the dose is set, thus ensuring the accuracy of the dosage. The two ends of tension spring 10 are fixed to the administration cylinder 1 and hollow cylinder 9 respectively, providing elastic restoring force for hollow cylinder 9. When the external force is released, the hollow cylinder 9 is pulled to drive magnetic block 11 to reset, which is convenient for the next dose adjustment. At the same time, the inside of administration cylinder 1 restricts the movement of hollow cylinder 9. As shown in the figure, the L-shaped grooves 7 and magnetic block 8 of multiple metering discs 6 are set at different angles, so that when the previous metering disc 6 rotates and slides out of the hollow cylinder 9, the next metering disc 6 directly pushes the disc 4, so that the hollow cylinder 9 limits the metering disc 6, which simplifies the operation of metering and feeding, and prevents mutual interference between multiple metering discs 6, which may lead to inaccurate drug delivery. This ensures that metering discs 6 complete the limiting and releasing actions in sequence and stably, improving the continuity and reliability of the metering drug delivery process.

[0040] like Figures 5-6As shown, the sealing mechanism 13 includes a conical block 131, the outer wall of which is disposed inside the administration cartridge 1, and a sealing ring 132 is fixedly connected to the outer wall of the conical block 131, the outer wall of which is disposed inside the administration cartridge 1.

[0041] Specifically, the conical structure of the conical block 131 enhances the sealing effect and allows it to move slightly under drug pressure, ensuring that the seal is quickly reset after the drug is successfully sprayed out. The sealing ring 132 is fixed to the outer wall of the conical block 131 and fits tightly against the inside of the drug delivery cylinder 1, further enhancing the sealing performance and preventing the drug from leaking from the gap between the conical block 131 and the drug delivery cylinder 1.

[0042] like Figure 6 As shown, a limiting rod 14 is fixedly connected to the side of the conical block 131 away from the drug delivery cylinder 1, and a fixing plate 15 is slidably connected to the outer wall of the limiting rod 14.

[0043] Specifically, as shown in the figure, the limiting rod 14 and the fixing plate 15 are both set on the upper and lower sides of the conical block 131 to facilitate the movement of the conical block 131. The fixing plate 15 provides sliding support for the limiting rod 14 and serves as the mounting carrier for the elastic component, limiting the elastic extension and contraction direction of the elastic component. The limiting rod 14 limits the movement direction of the conical block 131, that is, it can only move axially, preventing the conical block 131 from shifting and causing the seal to fail.

[0044] like Figure 6 As shown, the outer wall of the fixing plate 15 is fixedly connected to the inside of the drug delivery cylinder 1. One end of the spring-16 is fixedly connected to the side of the fixing plate 15 near the conical block 131, and the other end of the spring-16 is fixedly connected to the conical block 131.

[0045] Specifically, the fixing plate 15 is fixed inside the drug delivery cylinder 1, serving as the mounting carrier for the spring-16 and limiting the elastic extension and contraction direction of the spring-16. The two ends of the spring-16 are respectively fixed to the fixing plate 15 and the conical block 131, providing elastic restoring force for the conical block 131. After the drug is sprayed out, it pushes the conical block 131 to quickly return to its original position, re-fitting the inside of the drug delivery cylinder 1 to achieve a seal and prevent subsequent drug leakage.

[0046] like Figure 7 As shown, the push rod 3 has multiple grooves 17 inside, which are arranged in a spiral.

[0047] Specifically, the slide groove 17 is opened inside the push rod 3 and is arranged in a spiral to provide a sliding trajectory for the motion transmission component. When the push rod 3 rotates, the motion transmission component moves along the spiral slide groove 17, thereby driving the metering component to move axially and realize dose adjustment.

[0048] like Figure 8As shown, a circular block 18 is provided on the inner wall of the chute 17, and the outer wall of the circular block 18 is fixedly connected to the inside of the metering disk 6.

[0049] Specifically, the circular block 18 is fixed inside the metering disk 6 and slides on the inner wall of the groove 17, converting the rotational motion of the pushing component into the axial movement of the metering disk 6, which is used as a motion transmission component for dose adjustment.

[0050] like Figure 8 As shown, the inside of the disc 4 has multiple limiting grooves 20, which are arranged in a ring.

[0051] Specifically, the limiting groove 20 is opened inside the disc 4 and arranged in a ring to provide a slot for the subsequent limiting component to be inserted and positioned. Through cooperation with the limiting component, the pushing component can be locked at different rotation angles.

[0052] like Figure 8 As shown, a T-shaped rod 21 is provided on the inner wall of the limiting groove 20, and a handle 19 is slidably connected to the outer wall of the T-shaped rod 21.

[0053] Specifically, the T-shaped rod 21 slides inside the handle 19, with one end inserted into the limiting groove 20 and the other end exposed outside the handle 19. By inserting it into the limiting groove 20 at different positions, the handle 19 is limited, locking the position of the set quantitative component.

[0054] like Figure 8 As shown, the outer wall of handle 19 is fixedly connected to the outer wall of push rod 3, and handle 19 is T-shaped.

[0055] Specifically, the handle 19 is T-shaped and fixed to the push rod 3, providing a gripping and operating part for the user, making it easy to manually drive the push rod 3 to rotate and advance axially, thus improving the ease of operation.

[0056] like Figure 8 As shown, one end of spring 22 is fixedly connected to the outer wall of T-shaped rod 21, and the other end of spring 22 is fixedly connected to the outer wall of handle 19.

[0057] Specifically, the two ends of the spring 22 are fixed to the outer wall of the T-shaped rod 21 and the outer wall of the handle 19 respectively, providing elastic restoring force to the T-shaped rod 21 and ensuring that the T-shaped rod 21 always limits the handle 19 when there is no external force pressing.

[0058] Workflow: First, remove piston 2 and its connecting parts from inside the administration cartridge 1. Place the medication inside the administration cartridge 1. The conical block 131 and sealing ring 132 prevent the medication from leaking out when not in use. Then, install piston 2 and its connecting parts inside the administration cartridge 1, positioning the dispensing nozzle 12 at the patient's ear, nose, or throat. By pushing the disc 4, piston 2 moves via connecting rod 5, causing the medication to move towards the dispensing nozzle 12. The force of the medication pushes the conical block 131 towards the dispensing nozzle 12, compressing spring 16. The movement of the conical block 131 is limited by the limiting rod 14. The movement of the conical block 131 facilitates the administration of medication through the dispensing nozzle 12.

[0059] As the disc 4 moves, multiple metering discs 6 are arranged in a regular pattern. When the metering disc 6 moves to the appropriate position, magnetic block 8 and magnetic block 11 align. At this time, the magnetic attraction between magnetic block 8 and magnetic block 11 causes the hollow cylinder 9 to move upward, stretching the tension spring 10. The hollow cylinder 9 slides into the inner wall of the L-shaped groove 7, limiting the metering disc 6. By rotating the disc 4, the piston 2 also rotates via the connecting rod 5. The metering disc 6 follows the rotation of the disc 4, causing the hollow cylinder 9 to slide on the inner wall of the L-shaped groove 7. When it slides to the appropriate position, the disc 4 is pushed further to move the metering disc 6, allowing the hollow cylinder 9 to slide out of the inner wall of the L-shaped groove 7 and no longer limit the metering disc 6. The hollow cylinder 9 is reset by the tension spring 10, facilitating the limiting of subsequent metering discs 6, thereby realizing the metered administration of the drug delivery cartridge 1.

[0060] The T-shaped rod 21 slides out of the inner wall of the limiting groove 20, compressing the spring 22. The T-shaped rod 21 no longer limits the handle 19, making it easier to rotate the handle 19. This causes the push rod 3 to rotate inside the disc 4 and piston 2. The slide groove 17 follows the rotation of the push rod 3, causing the round block 18 to slide inside the slide groove 17. The slide groove 17 is spiral-shaped, which facilitates the movement of the metering disc 6 towards the disc 4 under the action of the round block 18. Multiple slide grooves 17, round blocks 18, and metering discs 6 are provided and arranged regularly, which facilitates the adjustment of the distance between multiple metering discs 6, thereby realizing multi-level adjustment of the drug dosage and adapting to different usage scenarios.

[0061] In the description of this invention, the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "vertical," and "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only to describe the invention and not to require the invention to be constructed or operated in a specific orientation; therefore, they should not be construed as limitations on the invention. The terms "connected" and "linked" in this invention should be interpreted broadly. For example, they can refer to a connection or a detachable connection; they can refer to a direct connection or an indirect connection through intermediate components. Those skilled in the art can understand the specific meaning of the above terms based on the specific circumstances.

[0062] The above description represents the preferred mode of operation of the present invention. The specific operational modes are provided solely for a better understanding of the invention's concept. Those skilled in the art can make various improvements or equivalent substitutions based on the principles of this invention, and these improvements or equivalent substitutions are also considered to fall within the scope of protection of this invention.

Claims

1. An ear, nose, and throat drug delivery device, comprising a drug delivery cartridge (1), characterized in that: The drug delivery cartridge (1) is equipped with a piston (2) and a dispensing nozzle (12). A push rod (3) is installed inside the piston (2). A disc (4) is installed on the side of the push rod (3) away from the piston (2). A connecting rod (5) is fixedly connected between the piston (2) and the disc (4). A metering disc (6) is installed on the outer wall of both the push rod (3) and the connecting rod (5). An L-shaped groove (7) is opened inside the metering disc (6). A magnetic block (8) is fixedly connected to the inner wall of the L-shaped groove (7). A hollow cylinder (9) is slidably connected inside the drug delivery cartridge (1). One end of a tension spring (10) is fixedly connected to the inner top wall of (9), and the other end of the tension spring (10) is fixedly connected to the inner bottom wall of the drug delivery cylinder (1). A magnetic block two (11) is fixedly connected inside the hollow cylinder (9). The magnetic blocks two (11) and magnetic block one (8) are attracted to each other. A sealing mechanism (13) is provided inside the drug delivery cylinder (1). Multiple sliding grooves (17) are opened inside the push rod (3). The sliding grooves (17) are arranged in a spiral. A round block (18) is provided on the inner wall of the sliding groove (17). The outer wall of the round block (18) is fixedly connected to the inside of the metering disc (6).

2. The ear, nose, and throat drug delivery device according to claim 1, characterized in that: The sealing mechanism (13) includes a conical block (131), the outer wall of which is disposed inside the administration cylinder (1), and a sealing ring (132) is fixedly connected to the outer wall of the conical block (131), the outer wall of which is disposed inside the administration cylinder (1).

3. The ear, nose, and throat drug delivery device according to claim 2, characterized in that: The conical block (131) is fixedly connected to a limiting rod (14) on the side away from the drug delivery cylinder (1), and a fixing plate (15) is slidably connected to the outer wall of the limiting rod (14).

4. The ear, nose, and throat drug delivery device according to claim 3, characterized in that: The outer wall of the fixing plate (15) is fixedly connected to the inside of the drug delivery cylinder (1). One end of the spring (16) is fixedly connected to the side of the fixing plate (15) near the conical block (131), and the other end of the spring (16) is fixedly connected to the conical block (131).

5. The ear, nose, and throat drug delivery device according to claim 1, characterized in that: The disc (4) has multiple limiting grooves (20) inside, and the limiting grooves (20) are arranged in a ring.

6. The ear, nose, and throat drug delivery device according to claim 5, characterized in that: The inner wall of the limiting groove (20) is provided with a T-shaped rod (21), and the outer wall of the T-shaped rod (21) is slidably connected with a handle (19).

7. The ear, nose, and throat drug delivery device according to claim 6, characterized in that: The outer wall of the handle (19) is fixedly connected to the outer wall of the push rod (3), and the handle (19) is T-shaped.

8. The ear, nose, and throat drug delivery device according to claim 6, characterized in that: One end of spring two (22) is fixedly connected to the outer wall of the T-shaped rod (21), and the other end of spring two (22) is fixedly connected to the outer wall of the handle (19).

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