A paste medicine applying device

Abstract

This invention belongs to the field of medical device technology and relates to a paste-like drug application device. It includes: a receiving cylinder, a cap cylinder, and a mounting ring. The cap cylinder and the mounting ring are threaded to both ends of the receiving cylinder. The mounting ring is fixedly connected to a mounting member, and the mounting member is fixedly connected to uniformly distributed fixing seats. The fixing seats are provided with a mounting cylinder. A sliding member is slidably connected inside the mounting cylinder, and an abutment ball is rotatably connected to the sliding member. A drug-applying ball is placed inside the mounting cylinder, contacting the adjacent abutment ball. This invention relies on flow resistance to prevent the drug from flowing out of the mounting cylinder. The drug-applying ball adheres to the drug within the mounting cylinder, and as it rolls along the scalp, it applies the drug to the scalp. This reduces the impact of movement speed and drug expulsion speed on the uniformity of application, thereby improving the uniformity of application. While ensuring therapeutic efficacy, it reduces the probability of local irritation and minimizes unnecessary waste.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a paste-like drug application device. Background Technology

[0002] A scalp drug delivery device is a tool for precise scalp drug administration, effectively avoiding drug waste and reducing direct hand contact with the medication. Its typical structure includes a drug reservoir, hollow comb teeth, and a small ball inside the comb teeth that acts as a valve. In use, the medication is first injected into the reservoir; the ball then seals the ends of the comb teeth to prevent leakage. When the comb teeth contact the area of ​​the scalp to be treated and are used for reciprocating combing, the ball moves inward under scalp pressure, opening the ends of the comb teeth. The medication is then expelled by gravity and adheres to the scalp (for less fluid medications such as ointments, manual squeezing is used during application to assist in expelling the medication from the ends of the comb teeth). By simulating combing motions, this device achieves targeted drug delivery. However, in practical applications, existing scalp drug delivery devices often result in inconsistent drug application amounts at different sites due to the difficulty in maintaining uniform movement and drug expulsion speeds. This unevenness can cause fluctuations in drug concentration at the affected area: areas with insufficient drug application may not reach an effective blood drug concentration, affecting the treatment effect and even delaying recovery; areas with excessive drug application are prone to local irritation and unnecessary drug loss. Summary of the Invention

[0003] This invention provides a paste-like drug application device to overcome the shortcomings of existing scalp drug delivery devices, which have uneven movement speed and drug discharge speed, resulting in uneven drug application to the affected area of ​​the scalp.

[0004] The technical solution of the present invention is as follows: a paste-like drug application device, comprising: a receiving cylinder, a cap cylinder, and a mounting ring. The cap cylinder and the mounting ring are respectively threaded to both ends of the receiving cylinder. A mounting component is fixedly connected to the side of the mounting ring away from the receiving cylinder. The receiving cylinder, the cap cylinder, the mounting ring, and the mounting component together form a drug storage cavity for containing the drug. The mounting component is fixedly connected to uniformly distributed fixing seats. The fixing seats are provided with mounting cylinders. The fixing seats are provided with flow holes for communicating between the drug storage cavity and the mounting cylinders. A sliding component is slidably connected inside the mounting cylinder. A groove is provided on the periphery of the sliding component. An abutment ball is rotatably connected to the sliding component. A drug-dispensing ball that contacts the adjacent abutment ball is placed inside the mounting cylinder. A variable diameter part that contacts the adjacent drug-dispensing ball is provided on the lower side of the mounting cylinder. An elastic sheet is fixedly connected between the sliding component and the adjacent fixing seat. A constant pressure component for maintaining stable pressure inside the drug storage cavity is provided inside the cap cylinder.

[0005] Furthermore, the constant pressure component includes a thin-film sensor and a micro air pump. The thin-film sensor is disposed inside the cap and monitors the pressure inside the drug storage chamber. The micro air pump is fixed to the cap and connects the outside to the drug storage chamber.

[0006] Furthermore, a piston is provided in both the receiving cylinder and the cover cylinder, and the thin-film sensor is fixedly connected to the piston. The diameter of the piston, the inner diameter of the cover cylinder, and the inner diameter of the receiving cylinder are equal, so that the piston can slide in a sealed manner within the receiving cylinder and the cover cylinder.

[0007] Furthermore, the receiving cylinder is made of transparent material and has scale lines on its side wall, with all scale lines on the receiving cylinder located below its end face near the cover cylinder.

[0008] Furthermore, a limiting post is provided inside the mounting cylinder, which is used to limit the minimum distance between adjacent sliding members and adjacent fixed seats.

[0009] Furthermore, the mounting cylinder is detachably connected to the adjacent fixed seat, and the limiting post is threadedly connected to the adjacent fixed seat.

[0010] Furthermore, the center of the abutting ball is located on the central axis of the mounting cylinder. When the sliding member is in contact with the adjacent limiting post, the drug-dispensing ball is in contact with the adjacent variable diameter part but not with any part of the mounting cylinder other than the variable diameter part.

[0011] Furthermore, the mounting cylinder is made of elastic metal to increase the contact area between the drug delivery ball and the adjacent variable diameter part when the sliding member is in contact with the adjacent limiting post.

[0012] Furthermore, the mounting component is made of an elastic material, and the middle part of the mounting component protrudes downward.

[0013] Furthermore, the minimum force required for the deformation of the mounting component is greater than the sum of the maximum elastic forces of all the elastic sheets.

[0014] In summary, this application includes at least one of the following beneficial technical effects:

[0015] 1. This invention relies on flow resistance to prevent the drug from flowing out of the mounting cylinder. The drug-coated ball adheres to the drug inside the mounting cylinder and applies the drug to the scalp as the ball rolls along the scalp. This reduces the impact of the movement speed and drug discharge speed on the uniformity of drug application, thereby improving the uniformity of drug application. While ensuring the therapeutic effect, it reduces the probability of causing local irritation and reduces unnecessary waste.

[0016] 2. The pressure inside the drug storage chamber is sensed by a thin-film sensor and regulated by a micro air pump to keep the pressure inside the drug storage chamber stable. This ensures that the drug ball can always be in full contact with the drug during its rotation, thereby improving the uniformity of the drug thickness adhered to the drug ball each time and improving the uniformity of application to the scalp.

[0017] 3. The sliding component is limited by the limiting post to prevent the medicine ball from retracting completely into the mounting tube, thereby reducing the probability of the mounting tube directly contacting the scalp and scratching it. At the same time, maintaining the gap between the medicine ball and the variable diameter part is conducive to the smooth application of medicine.

[0018] 4. The ball is used to limit the position of the medicated ball, but it does not restrict the specific position of the medicated ball inside the mounting tube. This allows the position of the medicated ball inside the mounting tube to change automatically in real time according to the combing direction (similar to the principle of a caster wheel). This ensures that the medicated ball is always in contact with the adjacent diameter-changing part. As the medicated ball rolls, the contact point between the medicated ball and the adjacent diameter-changing part scrapes away the impurities adhering to the surface of the medicated ball, thereby reducing the probability of scalp impurities entering the mounting tube. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 2 This is a three-dimensional structural diagram of the fixing seat and piston of the present invention;

[0021] Figure 3 This is a three-dimensional structural cross-sectional view of the cover cylinder and mounting ring of the present invention;

[0022] Figure 4 This is a three-dimensional structural diagram of the sliding component and the drug delivery ball of the present invention;

[0023] Figure 5 This is a three-dimensional structural diagram of the elastic sheet and limiting post of the present invention;

[0024] Figure 6 This is a three-dimensional structural diagram of the drug-applied ball of the present invention in the drug-applied state.

[0025] Reference numerals: 1-Containing cylinder, 2-Cover cylinder, 3-Mounting ring, 4-Mounting component, 401-Drug storage chamber, 5-Fixing seat, 501-Flow hole, 6-Mounting cylinder, 601-Diameter changing part, 7-Sliding component, 701-Groove, 8-Abutting ball, 9-Drug dispensing ball, 10-Elastic sheet, 11-Thin film sensor, 12-Miniature air pump, 13-Piston, 14-Limiting post. Detailed Implementation

[0026] 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.

[0027] Example 1

[0028] This embodiment provides a paste-like drug application device to solve the problem of uneven drug application caused by the movement speed of existing scalp drug delivery devices.

[0029] See Figures 1 to 5 A paste-like drug application device includes: a receiving cylinder 1, a cap cylinder 2, and a mounting ring 3. The cap cylinder 2 and the mounting ring 3 are threaded to the upper and lower ends of the receiving cylinder 1, respectively. A mounting component 4 is fixedly connected to the lower side of the mounting ring 3. The receiving cylinder 1, cap cylinder 2, mounting ring 3, and mounting component 4 together form a drug storage cavity 401 for containing the drug. The mounting component 4 is fixedly connected to uniformly distributed fixing seats 5, the number of which is reasonably arranged according to the area of ​​the lower side of the mounting component 4. A mounting cylinder 6 is provided at the lower part of the fixing seat 5. The surface of the mounting cylinder 6 is modified (e.g., electrolytic polishing) to reduce the surface energy of the mounting cylinder 6, thereby reducing the adhesion between the drug and the mounting cylinder 6 and facilitating cleaning of the mounting cylinder 6. The fixing seat 5 is provided with a plurality of flow holes 501 that run vertically through it and are distributed in a ring. The flow holes 501 are used to connect the drug storage cavity 401 with the interior of the mounting cylinder 6 and provide... The drug provides flow resistance, preventing the drug entering the mounting cylinder 6 from flowing by gravity within the drug storage chamber 401. A sliding member 7 is slidably connected inside the mounting cylinder 6. The sliding member 7 has annularly distributed grooves 701 on its periphery. The grooves 701 allow the drug to pass over the sliding member 7 when flowing in the mounting cylinder 6. An abutment ball 8 is rotatably connected to the lower part of the sliding member 7. A drug-distributing ball 9 is placed in the lower part of the mounting cylinder 6, contacting the adjacent abutment ball 8. The surface of the drug-distributing ball 9 is coated to promote uniform drug adhesion. A diameter-changing part 601 is provided on the lower side of the mounting cylinder 6. The drug-distributing ball 9 contacts the adjacent diameter-changing part 601. The diameter-changing part 601 is used to confine the adjacent drug-distributing ball 9 within the adjacent mounting cylinder 6. An elastic sheet 10 is fixed between the sliding member 7 and the adjacent fixed seat 5. A constant pressure component is provided inside the cover cylinder 2 to maintain stable pressure within the drug storage chamber 401.

[0030] The above setup enables the drug to be prevented from flowing out of the mounting cylinder 6 by relying on flow resistance, and the drug ball 9 to adhere the drug inside the mounting cylinder 6. As the drug ball 9 rolls along the scalp, the drug is applied to the scalp. This reduces the impact of the moving speed and the drug discharge speed on the uniformity of drug application, thereby improving the uniformity of drug application. While ensuring the therapeutic effect, it reduces the probability of causing local irritation and reduces unnecessary waste.

[0031] It should be noted that in this embodiment, the arrangement of the fixing base 5 and the mounting cylinder 6 can be regarded as a fixed connection.

[0032] See Figure 2 and Figure 3 The constant pressure component includes a thin-film sensor 11 and a micro air pump 12. The thin-film sensor 11 is installed inside the cover cylinder 2 and monitors the pressure inside the drug storage chamber 401 (the pressure inside the drug storage chamber 401 is determined by the flowability of the drug and the flow resistance of the flow hole 501, the mounting cylinder 6 and the groove 701). The micro air pump 12 is fixed to the cover cylinder 2 and connects the outside to the drug storage chamber 401. The micro air pump 12 injects and evacuates air into the drug storage chamber 401 to maintain the stability of the pressure inside the drug storage chamber 401. This ensures that the drug can only flow to the drug distribution ball 9 and cannot continue to flow. In this way, the drug fully covers the drug distribution ball 9 but cannot overflow from the gap between the drug distribution ball 9 and the variable diameter part 601.

[0033] The above setup enables the pressure inside the drug storage chamber 401 to be sensed by the thin-film sensor 11 and the pressure inside the drug storage chamber 401 to be regulated by the micro air pump 12, so that the pressure inside the drug storage chamber 401 remains stable. This ensures that the drug ball 9 can always be in full contact with the drug during its rotation, thereby improving the uniformity of the thickness of the drug adhered to the drug ball 9 each time and improving the uniformity of application to the scalp.

[0034] See Figure 2 and Figure 3 A piston 13 is provided in both the container 1 and the cover 2. Initially, the piston 13 is located in the cover 2. The piston 13 divides the drug storage chamber 401 into upper and lower parts. The piston 13 is used to gather the drug adhering to the inner wall of the container 1, improve the utilization rate of the drug and facilitate the cleaning of the container 1. The thin film sensor 11 is fixedly connected to the piston 13. The diameter of the piston 13, the inner diameter of the cover 2 and the inner diameter of the container 1 are equal, so that the piston 13 can slide in a sealed manner in the container 1 and the cover 2.

[0035] See Figure 1 and Figure 2 The container 1 is made of transparent material and has scale lines on its side wall. All scale lines on the container 1 are located below its end face near the cap 2. During the application of medicine, a gap is created between the medicine and the piston 13, thereby improving the utilization rate of the medicine in the storage chamber 401 and the mounting cylinder 6.

[0036] Application process: Rotate the cap 2 to disconnect it from the container 1, and inject the medicine into the container 1 up to the maximum mark. Then tighten the cap 2 into the container 1. At this time, there is air between the piston 13 and the medicine in the container 1. Turn on the micro air pump 12 and the thin film sensor 11. The thin film sensor 11 senses the pressure in the medicine storage chamber 401. The micro air pump 12 injects or evacuates air into the upper part of the medicine storage chamber 401 (i.e., the part of the medicine storage chamber 401 located above the piston 13) according to the data fed back by the thin film sensor 11, so as to maintain the pressure in the medicine storage chamber 401 stable.

[0037] The patient holds the device and moves it along the area of ​​the scalp where the medication is to be applied. After the device comes into contact with the scalp, the medication ball 9 contacts the scalp and is squeezed by the scalp, causing it to move upward relative to the adjacent mounting cylinder 6. The medication ball 9 pushes the adjacent sliding member 7 upward through the adjacent abutment ball 8 and squeezes the adjacent elastic sheet 10 to bend and deform, creating a gap between the medication ball 9 and the adjacent variable diameter part 601. At this time, the medication in the storage cavity 401 enters the mounting cylinder 6 through the flow hole 501 under the push of the internal pressure and flows downward along the mounting cylinder 6 until the medication passes through the groove 701 and reaches the gap between the medication ball 9 and the adjacent variable diameter part 601, at which point the flow stops.

[0038] As the device moves along the scalp, the medication ball 9 rolls along the scalp, and the medication adhering to the surface of the medication ball 9 passes through the gap between the medication ball 9 and the adjacent diameter-changing part 601. When the medication adhering to the surface of the medication ball 9 comes into contact with the scalp, it adheres to the scalp. Then, the part of the medication ball 9 that does not have medication adhering to it rotates into the mounting cylinder 6 and comes into contact with the medication, and the medication adheres to the surface of the medication ball 9. The above steps are repeated, and the medication is applied to the scalp by rolling the medication ball 9. The whole process is similar to the principle of a ballpoint pen drawing on paper, thus reducing the impact of the moving speed and the medication discharge speed on the uniformity of application.

[0039] After a single application, the medicated ball 9 is no longer squeezed by the scalp, causing the medicated ball 9 and the adjacent sliding member 7 to move downward under the elastic force of the adjacent elastic sheet 10 and reset relative to the mounting cylinder 6. The medicated ball 9 then re-seals the lower end of the mounting cylinder 6. Afterward, the part of the medicated ball 9 that protrudes from the adjacent mounting cylinder 6 can be simply cleaned.

[0040] As the medication in the storage chamber 401 is applied to the scalp, the volume of the medication in the storage chamber 401 gradually decreases. Under the pressure of the air in the upper part of the storage chamber 401, the piston 13 gradually moves downward. The patient can judge the volume of medication applied in a single application based on the movement distance of the piston 13 and the medication relative to the scale on the receiving cylinder 1. After multiple uses, the medication in the storage chamber 401 is gradually consumed. In this state, as the piston 13 continues to move downward, the piston 13 can push the medication downward in the mounting cylinder 6 through the air remaining in the lower part of the storage chamber 401, thus further improving the utilization rate of the medication.

[0041] Example 2

[0042] This embodiment is a further optimization based on Embodiment 1.

[0043] In the use of existing scalp medication devices, if the patient applies too much pressure, the small balls inside the comb teeth will completely retract into the comb teeth, causing the hollow comb teeth to come into direct contact with the scalp. This can lead to scalp scratches and the scalp can easily block the comb teeth, making it difficult for the medication to be applied to the scalp surface through the comb teeth.

[0044] See Figures 4 to 6 The mounting cylinder 6 is provided with a limiting post 14, which is used to limit the minimum distance between adjacent sliding parts 7 and adjacent fixed seats 5. The limiting post 14 limits the sliding parts 7 to prevent the medicine ball 9 from being completely retracted into the mounting cylinder 6, thereby reducing the probability of the mounting cylinder 6 directly contacting the scalp and scratching the scalp. At the same time, it maintains the gap between the medicine ball 9 and the variable diameter part 601, which is conducive to the smooth application of medicine.

[0045] See Figure 4 The mounting cylinder 6 and the adjacent fixed seat 5 are detachably connected by a rubber ring limiting compression method. The limiting post 14 is threadedly connected to the adjacent fixed seat 5. By adjusting the position of the limiting post 14, the maximum distance between the sliding part 7 and the adjacent fixed seat 5 can be adjusted, thereby controlling the size of the gap between the drug ball 9 and the adjacent variable diameter part 601. This changes the thickness of the drug adhering to the surface of the drug ball 9, thereby changing the thickness of the locally applied drug.

[0046] Example 3

[0047] This embodiment is a further optimization based on embodiment 2, in order to reduce the probability of impurities on the scalp surface entering the mounting tube 6.

[0048] See Figure 5 and Figure 6 The center of the contact ball 8 is located on the central axis of the mounting cylinder 6. With the sliding member 7 in contact with the adjacent limiting post 14, the drug delivery ball 9 contacts the adjacent diameter-changing part 601 but not the portion of the mounting cylinder 6 other than the diameter-changing part 601 (see [link]). Figure 5 (State of the drug ball 9 and the variable diameter part 601); the mounting cylinder 6 is made of elastic metal to increase the contact area between the drug ball 9 and the adjacent variable diameter part 601 when the sliding member 7 is in contact with the adjacent limiting post 14.

[0049] The above setup enables the abutment ball 8 to limit the position of the medicated ball 9, but does not restrict the specific position of the medicated ball 9 within the mounting cylinder 6. This allows the position of the medicated ball 9 within the mounting cylinder 6 to change automatically in real time according to the combing direction (similar to the principle of a universal wheel), ensuring that the medicated ball 9 is always in contact with the adjacent variable diameter section 601. Thus, during the rolling process of the medicated ball 9, the contact position between the medicated ball 9 and the adjacent variable diameter section 601 scrapes away impurities adhering to the surface of the medicated ball 9, thereby reducing the probability of scalp impurities entering the mounting cylinder 6.

[0050] Example 4

[0051] This embodiment is a further optimization based on embodiment 3, providing functionality to adapt to different patient head shapes.

[0052] See Figure 2 and Figure 3 The mounting part 4 is made of elastic rubber, and the middle part of the mounting part 4 protrudes downward. The minimum force required for the deformation of the mounting part 4 is greater than the sum of the maximum elastic forces of all the elastic sheets 10. This is so that after the medicine ball 9 moves to the limit position in the adjacent mounting cylinder 6, the mounting part 4 can be squeezed by the mounting cylinder 6 to cause local deformation. In this way, the deformation of the mounting part 4 allows the medicine ball 9 to fit different head shapes and ensures that the coating thickness of all medicine balls 9 is consistent.

[0053] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention are included within the scope of protection of the present invention.

Claims

1. A paste-like drug application device, characterized in that, include: The container includes a receiving cylinder (1), a cover cylinder (2), and a mounting ring (3). The cover cylinder (2) and the mounting ring (3) are threaded to both ends of the receiving cylinder (1). A mounting component (4) is fixedly connected to the side of the mounting ring (3) away from the receiving cylinder (1). The receiving cylinder (1), the cover cylinder (2), the mounting ring (3), and the mounting component (4) together form a drug storage cavity (401) for containing drugs. The mounting component (4) is fixedly connected to uniformly distributed fixing seats (5). The fixing seats (5) are provided with mounting cylinders (6). The fixing seats (5) are provided with a function to connect the drug storage cavity (401) to the mounting cylinders (6). A circulating hole (501) is connected, a sliding member (7) is slidably connected inside the mounting cylinder (6), a groove (701) is provided on the periphery of the sliding member (7), an abutment ball (8) is rotatably connected to the sliding member (7), a medicine ball (9) that contacts the adjacent abutment ball (8) is placed inside the mounting cylinder (6), a variable diameter part (601) that contacts the adjacent medicine ball (9) is provided on the lower side of the mounting cylinder (6), an elastic sheet (10) is fixedly connected between the sliding member (7) and the adjacent fixed seat (5), and a constant pressure component for maintaining the pressure in the medicine storage chamber (401) is provided inside the cover cylinder (2); The constant pressure component includes: A thin-film sensor (11) and a micro air pump (12) are provided. The thin-film sensor (11) is disposed inside the cover cylinder (2) and monitors the pressure inside the drug storage chamber (401). The micro air pump (12) is fixed to the cover cylinder (2) and connects the outside world to the drug storage chamber (401). A piston (13) is provided in both the receiving cylinder (1) and the cover cylinder (2). The thin film sensor (11) is fixedly connected to the piston (13). The diameter of the piston (13), the inner diameter of the cover cylinder (2) and the inner diameter of the receiving cylinder (1) are equal, so that the piston (13) slides in a sealed manner in the receiving cylinder (1) and the cover cylinder (2). The mounting cylinder (6) is provided with a limiting post (14), which is used to limit the minimum distance between the adjacent sliding member (7) and the adjacent fixed seat (5); The center of the abutting ball (8) is located on the central axis of the mounting cylinder (6). When the sliding member (7) is in contact with the adjacent limiting post (14), the medicine ball (9) is in contact with the adjacent variable diameter part (601) but not with any part of the mounting cylinder (6) other than the variable diameter part (601).

2. The ointment-like drug application device according to claim 1, characterized in that, The container (1) is made of transparent material and has scale lines on its side wall. All scale lines on the container (1) are located below its end face near the cover (2).

3. The ointment-like drug application device according to claim 1, characterized in that, The mounting cylinder (6) is detachably connected to the adjacent fixing seat (5), and the limiting post (14) is threadedly connected to the adjacent fixing seat (5).

4. The ointment-like drug application device according to claim 3, characterized in that, The mounting cylinder (6) is made of elastic metal and is used to increase the contact area between the drug ball (9) and the adjacent variable diameter part (601) when the sliding member (7) is in contact with the adjacent limiting post (14).

5. The ointment-like drug application device according to claim 1, characterized in that, The mounting component (4) is made of elastic material, and the middle part of the mounting component (4) protrudes downward.

6. The ointment-like drug application device according to claim 5, characterized in that, The minimum force required for the deformation of the mounting component (4) is greater than the sum of the maximum elastic forces of all the elastic sheets (10).

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