Ear canal wall medicine applying device

Abstract

The utility model discloses an ear canal wall medicine applying device which comprises an outer tube and an inner tube, the inner tube is located in the outer tube and movably connected with the outer tube, a medicine applying head is arranged at one end of the inner tube, and a medicine feeding device is arranged at the other end of the inner tube. In a non-use state, the medicine applying head is positioned in the outer tube; in the using state, the medicine applying head extends out of the outer tube. According to the scheme, an inner-outer tube structure is adopted, the inner tube is used for containing or conveying medicine, then the medicine is evenly applied through the medicine applying head, the medicine feeding device can guarantee that the medicine is not prone to entering the medicine applying head in advance due to misoperation, and the outer tube can wrap the medicine applying head at the tail end of the inner tube before use to guarantee sanitation; after the medicine applying head extends into the ear canal, the medicine applying head extends out of the outer tube to ensure that the medicine applying head extends into the ear canal smoothly; the outer tube is provided with the abutting portion abutting against the auditory meatus opening, the extending length of the inner tube does not exceed 2 cm through the structural design, operation is more convenient, it is guaranteed that the extending distance is not too long, and the tympanic membrane is prevented from being damaged.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, and specifically relates to an ear canal wall medication application device. Background Technology

[0002] The external auditory canal is a blind tube, approximately 2.5 cm long, that originates from the external auditory meatus in the concha cavity and terminates at the tympanic membrane, extending into the temporal bone. In some treatments, medication needs to be applied to the inner wall of the ear canal. Traditional methods, such as using cotton swabs, are inconvenient and unsafe. Existing patents, such as the Chinese utility model patent with authorization publication number CN213641567U, first use a suction tube structure to draw up the medication, then attach a medication applicator to the end of the suction tube structure before inserting it into the ear canal for application. This method has advantages such as ensuring even application of the medication through the applicator. However, because the applicator is always exposed, contamination may occur; and if the applicator has already come into contact with the medication before being inserted into the ear canal, it will become wetted and swell, making insertion into the ear canal inconvenient. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide an ear canal wall medication application device, which solves the problems of difficulty in applying medication in the narrow space of the ear canal and easy contamination of the medication application head, and realizes a more convenient and safer ear canal wall medication application process.

[0004] According to the technical solution of this utility model, this utility model provides an ear canal wall medication application device, characterized in that it includes an outer tube and an inner tube, the inner tube is located inside the outer tube and is movably connected to the outer tube, one end of the inner tube is provided with a medication application head, and the other end of the inner tube is provided with a drug delivery device; in the non-use state, the medication application head is located inside the outer tube; in the use state, the medication application head extends out of the outer tube.

[0005] According to some embodiments, the drug delivery device is a propulsion device, which includes a drug delivery cylinder and a propulsion rod, wherein the propulsion rod is disposed inside the drug delivery cylinder and is slidably connected to the drug delivery cylinder in a sealed manner.

[0006] According to some embodiments, the drug delivery device is a detachable sealing mechanism, and the detachable sealing mechanism is detachably connected to the inner tube; when the detachable sealing mechanism is not detached, the detachable sealing mechanism seals the end of the inner tube away from the application head; when the detachable sealing mechanism is detached, the application head is connected to the outside through the inner tube.

[0007] According to some embodiments, an easily puncturable elastic waterproof membrane is provided between the inner tube and the application head.

[0008] According to some embodiments, the outer diameter of the outer tube is smaller than the inner diameter of the ear canal; the side of the inner tube has scale markings, and the outer tube is transparent or has an observation window corresponding to the scale markings.

[0009] Furthermore, the outer tube has a negative pressure connector branch tube at the end near the drug delivery device, and a removable sealing cap at the end near the application head, with a suction port on the sealing cap; it also includes a negative pressure suction tube, one end of which is connected to a negative pressure suction device, and the other end of which passes through the negative pressure connector branch tube and the gap between the outer tube and the inner tube and extends out from the suction port.

[0010] According to some embodiments, the end of the outer tube near the medicated head is the abutment part, which is hemispherical, semi-ellipsoidal, or conical, and the outer diameter of the abutment part at its maximum is greater than the inner diameter of the ear canal.

[0011] Preferably, the inner tube and the outer tube are connected by a spring, the outer tube is provided with a first latching part, and the inner tube is provided with a second latching part; when the application head extends out of the outer tube, the first latching part and the second latching part engage to lock the relative position of the inner tube and the outer tube.

[0012] Preferably, the outer tube is provided with a first limiting part, and the inner tube is provided with a second limiting part; when the application head extends out of the outer tube, the second limiting part and the first limiting part abut against each other or indirectly, so that the distance between the inner tube extending out of the outer tube does not exceed 2cm.

[0013] According to some embodiments, the application head is a soft structure with pores, and the application head is fixedly connected to or detachably connected to the inner tube.

[0014] Compared with the prior art, the beneficial technical effects of this utility model are as follows:

[0015] This utility model's ear canal wall medication application device has an inner and outer tube structure. The inner tube is used to contain or deliver the medication, which is then evenly applied through the medication application head. The medication delivery device ensures that the medication is not likely to enter the medication application head prematurely due to misoperation. The outer tube can wrap around the medication application head at the end of the inner tube before use to ensure hygiene. Furthermore, in some embodiments, the medication application head only extends out of the outer tube after being inserted into the ear canal, ensuring a smooth insertion process. In other embodiments, the outer tube has a stop portion that rests against the ear canal opening. Through structural design, the length of the inner tube that can extend does not exceed 2cm, making it easier to operate and ensuring that the insertion distance is not too long, thus avoiding damage to the tympanic membrane. Attached Figure Description

[0016] Figure 1 This is a structural schematic diagram based on the first embodiment of the present utility model.

[0017] Figure 2 This is a structural schematic diagram based on the second embodiment of the present utility model.

[0018] Figure 3 This is a structural schematic diagram based on the third embodiment of the present utility model.

[0019] Figure 4This is a structural schematic diagram based on the fourth embodiment of the present utility model.

[0020] Figure 5 yes Figure 4 The illustrated embodiment is a structural diagram in its usage state.

[0021] Figure 6 This is a structural schematic diagram based on the fifth embodiment of the present utility model.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Outer tube; 11. Observation window; 12. Abutment part; 13. Spring; 14. First latching part; 15. First limiting part; 2. Inner tube; 21. Scale mark; 22. Second latching part; 23. Second limiting part; 24. Limiting block; 3. Application head; 4. Drug delivery device; 41. Drug delivery cylinder; 42. Push rod; 43. Detachable sealing mechanism; 44. Easily puncturable elastic waterproof membrane; 51. Negative pressure connector branch pipe; 52. Sealing cap; 53. Suction tube opening; 54. Negative pressure suction tube. Detailed Implementation

[0024] This invention provides an ear canal wall medication application device that solves problems such as difficulty in applying medication in the narrow space of the ear canal and easy contamination of the application head, thus achieving a more convenient and safer ear canal wall medication application process.

[0025] Please see Figure 1 An embodiment of the present invention provides an ear canal wall medication application device, comprising an outer tube 1 and an inner tube 2. The inner tube 2 is located inside the outer tube 1 and is movably connected to the outer tube 1, and the interior of the inner tube 2 is used to contain and / or deliver medication. One end of the inner tube 2 is provided with a medication application head 3, which is used to absorb the medication and evenly apply the medication around the ear canal wall. The other end of the inner tube 2 is provided with a drug delivery device 4, which is used to control drug delivery, ensuring that the medication application head 3 does not come into contact with the medication before drug delivery, and then the medication can be delivered to the medication application head 3 through the inner tube 2 through a simple operation. The inner tube 2 can be displaced along its length within the outer tube 1, so that in the non-use state, the medication application head 3 is located inside the outer tube 1, and in the use state, the medication application head 3 extends out of the outer tube 1, thus ensuring the cleanliness and hygiene of the medication application head 3.

[0026] like Figure 1In the illustrated embodiment, the drug delivery device 4 is a propeller device, which includes a drug delivery cylinder 41 and a propeller rod 42. The propeller rod 42 is disposed inside the drug delivery cylinder 41 and is slidably connected to the drug delivery cylinder 41 in a sealed manner. More specifically, the inner diameter of the drug delivery cylinder 41 can be larger than that of the inner tube 2, and there is a smooth, sealed transition between the drug delivery cylinder 41 and the inner tube 2 (e.g., integral molding). One end of the propeller rod 42 has a sealing head, for example, made of rubber, to achieve a sealed sliding connection with the drug delivery cylinder 41. The other end of the propeller rod 42 has a structure for easy operation, such as a propeller plate. The drug delivery cylinder 41 contains medication. Because the propeller rod 42 seals the integral tubular structure of the inner tube 2 and the drug delivery cylinder 41, and because the inner tube 2 is very thin, under atmospheric pressure, even highly fluid medications will not automatically flow to the application head 3 at the end of the inner tube 2. Furthermore, this propeller device is suitable for ointments with relatively poor flowability; for highly fluid liquids, the application head 3 can be made of cotton, etc., and for ointments, the application head 3 can be made of a structure with relatively larger pores, such as a sponge.

[0027] like Figure 2 In the illustrated embodiment, the drug delivery device 4 is a detachable sealing mechanism. The detachable sealing mechanism 43 is detachably connected to the inner tube 2, and the thinner inner tube 2 is pre-filled with medication. When the detachable sealing mechanism 43 is not detached, it seals the end of the inner tube 2 away from the application head 3, preventing the medication from flowing out under atmospheric pressure. When the detachable sealing mechanism 43 is detached, the application head 3 is connected to the outside through the inner tube 2, allowing the medication to flow quickly into the application head 3. For example… Figure 2 As shown, the detachable sealing mechanism 43 is a solid structure with an annular notch between it and the inner tube 2. When in use, the detachable sealing mechanism 43 can be bent or broken to achieve disassembly and connection with the outside. It is conceivable that other detachable structures that can form a seal, such as threaded connections, can also be used between the detachable sealing mechanism 43 and the inner tube 2.

[0028] like Figure 3In the illustrated embodiment, an easily puncturable elastic waterproof membrane 44 is provided between the inner tube 2 and the application head 3, thereby blocking the medication. This membrane is applicable to devices such as the aforementioned pusher device or other existing drug delivery devices, further ensuring that the medication will not accidentally come into contact with the application head 3. During use, the easily puncturable elastic waterproof membrane 44 can be punctured with a needle. In a preferred embodiment, the optional drug delivery device 4 is a conventional syringe, separate from the inner tube 2. During use, the syringe is inserted into and fitted into the inner tube 2. The syringe allows for easy loading of the medication and precise determination of the injected amount. The medication is injected into the inner tube 2, the application device is placed into the ear canal, the application head 3 is extended, and then the easily puncturable elastic waterproof membrane 44 is punctured with the needle tip of the syringe. During this process, the syringe needle is enclosed by the application head 3, the inner tube 2, and the outer tube 1, thus preventing damage to the ear canal. This application device has a simple structure, low cost, and is more suitable as a disposable consumable.

[0029] Please see again Figure 1 In some embodiments, the outer diameter of the outer tube 1 is smaller than the inner diameter of a typical human ear canal. During use, the outer tube 1 is inserted into the ear canal. The end of the outer tube 1 that extends into the ear canal has a smooth chamfer (not shown in the figure) to prevent accidental scratches to the ear canal wall. The inner tube 2 has scale markings 21 on its side, and the outer tube 1 is transparent or has an observation window 11 corresponding to the scale markings 21, facilitating observation of the depth to which the device enters the ear canal during operation. In more specific embodiments, such as... Figure 1 , Figure 3 As shown, the outer tube 1 and the inner tube 2 are connected by a matching threaded structure. The end of the inner tube 2 furthest from the application head 3 is the handheld end and always protrudes from the outer tube 1. During use, simply screwing on the inner tube 2 extends the application head 3, and the threaded structure allows the application head 3 to be locked in any position, thus facilitating subsequent operation of the drug delivery device 4. In other embodiments, the outer tube 1 and the inner tube 2 can be directly sleeved together, which is more suitable for applications such as... Figure 2 The drug delivery device 4 shown is simpler and faster to operate. For example, one can hold the outer tube 1 with one hand, push in the inner tube 2, and then break off the detachable sealing mechanism. Preferably, the outer side of the inner tube 2 has a limiting block 24. After the inner tube 2 is pushed in, the limiting block 24 abuts against the edge of the outer tube 1 to prevent the inner tube 2 from being pushed in too deeply. It is conceivable that other movable connection methods can also be used, such as sleeved with rubber sleeves at intervals, where the friction of the rubber sleeves can also achieve a certain positioning effect.

[0030] It should be noted that existing medication application devices all expose the application head directly, thus placing certain requirements on the size of the head. If it is too small, it is difficult to ensure that the medication is applied to all areas of the ear canal wall; if it is too large, it will obstruct the insertion of the head into the ear canal, making operation inconvenient and causing discomfort to the patient. In this design, the size of the application head 3 is restricted by the outer tube 1 during insertion into the ear canal, making the insertion process easier. The application head 3 can be made of elastic cotton, sponge, etc. Due to the restriction of the outer tube 1, a wider range of sizes can be selected. The application head 3 expands naturally after being extended or due to the entry of the medication. A larger application head 3 helps to more thoroughly apply the medication to all areas of the ear canal wall. For some treatment procedures, the application head 3 can also be left in the ear canal for reapplication at intervals (e.g., by dripping the medication onto the cotton left in the ear canal). A larger application head 3 is less likely to fall out due to its own weight, resulting in a better application effect.

[0031] Optionally, such as Figure 1 As shown, the outer tube 1 has a negative pressure connector branch tube 51 at one end near the drug delivery device 4, and a removable sealing cap 52 at one end near the application head 3. The sealing cap 52 has a suction port 53. It also includes a negative pressure suction tube 54, one end of which is connected to a negative pressure suction device, and the other end of which passes through the negative pressure connector branch tube 51 and the gap between the outer tube 1 and the inner tube 2 and extends out from the suction port 53. This type of drug delivery device can also be used for the cleaning process before drug delivery. The negative pressure suction device is a standard device at hospital bedsides, used to provide negative pressure, thereby allowing a long tube to be inserted into the ear canal to remove earwax, hair, and other debris. The suction tube that comes with the device is generally universal for use in various clinics, so it does not have graduation markings and its diameter is relatively large. This method is more suitable for cleaning the ear canal.

[0032] Please see Figure 4 , Figure 5 In some other embodiments of this invention, the end of the outer tube 1 near the application head 3 is a stop portion 12. The stop portion 12 is hemispherical, semi-ellipsoidal, or conical, and the maximum outer diameter of the stop portion 12 is larger than the inner diameter of the ear canal. Unlike the aforementioned embodiments, in this type of embodiment, the outer tube 1 does not extend into the ear canal but rests against the ear canal opening. The smooth stop portion 12 provides auxiliary positioning, resulting in greater accuracy, comfort, and safety. More specifically, for example, the inner tube 2 and the outer tube 1 are connected by a spring 13 (or other elastic element). For example, the inner tube 2 has annular flanges / plates on its outer surface and the outer tube 1. The spring 13 is fitted between the inner tube 2 and the outer tube 1 and abuts against the front and rear annular flanges. The spring 13 is a compression spring, which keeps the inner tube 2 "retracted" inside the outer tube 1 before use, and extends the inner tube 2 when used.

[0033] Preferably, the outer tube 1 is provided with a first locking part 14, and the inner tube 2 is provided with a second locking part 22. In the usage state where the application head 3 extends beyond the outer tube 1, the first locking part 14 and the second locking part 22 engage to lock the relative position of the inner tube 2 and the outer tube 1. For example… Figure 4 , Figure 5 As shown, the first latching part 14 and the second latching part 22 are plate-shaped structures respectively provided at the rear ends of the outer tube 1 and the inner tube 2. They can be annular plates or only provided on one side / both sides, etc. The end of the second latching part 22 (or the first latching part 14) has a bent hook. When the inner tube 2 is extended, the plate-shaped structures of the first latching part 14 and the second latching part 22 approach or fit together, and the hook surrounds and hooks the end of the first latching part 14 (or the second latching part 22), thereby resisting the elastic restoring force of the spring 13 and locking the position.

[0034] Preferably, the outer tube 1 is provided with a first limiting part 15, and the inner tube 2 is provided with a second limiting part 23. When the application head 3 extends beyond the outer tube 1, the second limiting part 23 and the first limiting part 15 abut against each other, ensuring that the distance the inner tube 2 extends beyond the outer tube 1 does not exceed 2 cm. This arrangement prevents the inner tube 2 from contacting or damaging the tympanic membrane due to improper operation or excessive insertion. For example… Figure 4 , Figure 5 As shown, the flange (and spring 13) for setting the spring 13, and / or the plate-like structure of the first latching part 14 and the second latching part 22, can also serve as the first and second limiting parts to prevent the application head 3 from going too deep.

[0035] It is conceivable that the aforementioned first and second limiting parts and first and second snap-fit ​​parts may coexist or only one of them may be used (for example, without snap-fit ​​parts, the inner tube 2 is pressed to apply the medicine, and then the entire medicine application device is removed), and the first and second limiting parts and first and second snap-fit ​​parts may be implemented using other similar structures. Figure 6 In another embodiment shown, the spring 13 (or other elastic element) is located on the outside, between the plate-like structure at the rear end of the inner tube 2 and the outer tube 1. The plate-like structure and the compressed spring 13 function as a limiting part. The first and second latching parts are flanges / plates located on the inner side of the outer tube 1 and the outer side of the inner tube 2, respectively, and are both distributed in a square sawtooth pattern, so that they can cross each other or abut each other after rotating a certain angle; or, as Figure 6 As shown, the flanges of the second latching part 22 and / or the first latching part 14 have smooth chamfers and a certain degree of elasticity, so that the second latching part 22 can move from one side of the first latching part 14 to the other side to achieve pushing in and locking, and then cannot or is difficult to move in the opposite direction.

[0036] The application head 3 is a porous, soft structure, such as cotton, sponge, or other artificially perforated materials. Preferably, the application head 3 expands after being soaked in or injected with medication, thereby evenly applying the medication to all areas around the ear canal wall. The application head 3 is fixedly connected to or detachably connected to the inner tube 2. For example, cotton (application head 3) can be adhered to the inner tube 2. During use, after medication is administered, the inner tube 2 along with the cotton is removed from the ear canal (it can be moved while being rotated with a finger), thereby completely applying the medication from the inside out to the ear canal wall. Alternatively, the cotton (application head 3) can form a cap-like structure that surrounds the inner tube 2, so that after removing the inner tube 2, the cotton remains in the ear canal, facilitating subsequent medication application (e.g., adding medication to the cotton in the ear canal using a dropper).

Claims

1. A device for applying medication to the ear canal wall, characterized in that, It includes an outer tube (1) and an inner tube (2). The inner tube (2) is located inside the outer tube (1) and is movably connected to the outer tube (1). One end of the inner tube (2) is provided with a drug application head (3), and the other end of the inner tube (2) is provided with a drug delivery device (4). In the non-use state, the drug application head (3) is located inside the outer tube (1). In the use state, the drug application head (3) extends out of the outer tube (1).

2. The ear canal wall medication applicator according to claim 1, characterized in that, The drug delivery device (4) is a propeller device, which includes a drug delivery cylinder (41) and a propeller rod (42). The propeller rod (42) is disposed inside the drug delivery cylinder (41) and is slidably connected to the drug delivery cylinder (41) in a sealed manner.

3. The ear canal wall medication applicator according to claim 1, characterized in that, The drug delivery device (4) is a detachable sealing mechanism, and the detachable sealing mechanism (43) is detachably connected to the inner tube (2). When the detachable sealing mechanism (43) is not detached, the detachable sealing mechanism (43) seals the end of the inner tube (2) away from the application head (3). When the detachable sealing mechanism (43) is detached, the application head (3) is connected to the outside through the inner tube (2).

4. The ear canal wall medication applicator according to claim 1, characterized in that, An easily puncturable elastic waterproof membrane (44) is provided between the inner tube (2) and the application head (3).

5. The ear canal wall medication applicator according to any one of claims 1-4, characterized in that, The outer diameter of the outer tube (1) is smaller than the inner diameter of the ear canal; the inner tube (2) has a scale mark (21) on its side, and the outer tube (1) is transparent or has an observation window (11) corresponding to the scale mark (21).

6. The ear canal wall medication applicator according to claim 5, characterized in that, The outer tube (1) has a negative pressure connector branch tube (51) on one side near the drug delivery device (4), and a detachable sealing cap (52) on one side near the drug application head (3). The sealing cap (52) has a suction port (53). It also includes a negative pressure suction tube (54), one end of which is connected to a negative pressure suction device, and the other end of which passes through the negative pressure connector branch tube (51) and the gap between the outer tube (1) and the inner tube (2) and extends out from the suction port (53).

7. The ear canal wall medication applicator according to any one of claims 1-4, characterized in that, The end of the outer tube (1) near the medicated head (3) is abutting part (12), which is hemispherical, semi-ellipsoidal or conical, and the outer diameter of the abutting part (12) is larger than the inner diameter of the ear canal at its maximum.

8. The ear canal wall medication applicator according to claim 7, characterized in that, The inner tube (2) and the outer tube (1) are connected by a spring (13). The outer tube (1) is provided with a first latching part (14), and the inner tube (2) is provided with a second latching part (22). When the application head (3) extends out of the outer tube (1) in the working state, the first latching part (14) and the second latching part (22) engage to lock the relative position of the inner tube (2) and the outer tube (1).

9. The ear canal wall medication applicator according to claim 7, characterized in that, The outer tube (1) is provided with a first limiting part (15), and the inner tube (2) is provided with a second limiting part (23). When the application head (3) extends out of the outer tube (1) in the working state, the second limiting part (23) and the first limiting part (15) abut against each other or indirectly so that the distance of the inner tube (2) extending out of the outer tube (1) does not exceed 2cm.

10. The ear canal wall medication applicator according to any one of claims 1-4, characterized in that, The application head (3) is a soft structure with pores, and the application head (3) is fixedly connected to or detachably connected to the inner tube (2).

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