A cavity dosing device
By designing a cavity-based quantitative drug delivery device, and utilizing an internal push rod and spring system, the problem of difficulty in quantitatively and orienting drugs in narrow cavities has been solved, achieving precise drug delivery and dosage control, and is suitable for drug delivery in narrow cavities such as the nasal cavity.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NUOYIMEIER (SHANDONG) MEDICAL TECH CO LTD
- Filing Date
- 2025-01-24
- Publication Date
- 2026-05-29
AI Technical Summary
In existing technologies, it is difficult to achieve quantitative and targeted drug delivery in narrow cavities, especially in narrow cavities such as the nasal cavity, where methods such as dripping and spraying cannot accurately control the distribution and dosage of drugs.
A cavity-based quantitative drug delivery device was designed, comprising a drug delivery component and a drug infusion component. The device achieves quantitative drug delivery through an inner push rod and spring system. It integrates a protective tube, an outer tube, an inner push rod, an inner push rod clamp, a spring, and a retainer, and is operated with a button to ensure accurate drug delivery into narrow cavities.
It enables quantitative targeted drug delivery within narrow cavities, is simple to operate, allows for precise control of drug dosage, meets clinical needs, and avoids damage to the mucosa.
Smart Images
Figure CN224292339U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of cavity drug delivery technology, and in particular to a cavity quantitative drug delivery device. Background Technology
[0002] The nasal cavity, ear canal, and intestines, as non-invasive drug delivery sites, possess unique mucosal physiological structures with advantages such as large absorption area, abundant capillaries, and low local enzyme activity, making them ideal drug absorption sites. Mucosal drug delivery offers advantages such as no first-pass effect and rapid onset of action, making it a feasible alternative to injection-based drug delivery and a potential route of administration to the central nervous system.
[0003] While these mucosal structures facilitate drug absorption, they are also quite fragile. During surgery, narrow cavities and mucosal sensitivity present significant challenges to precise localized targeted drug delivery. Narrow cavities limit the operating space, and instrument insertion can damage the mucosa. For example, in nasal surgery, the confined space within the nasal cavity makes it difficult to accurately deliver drugs to the affected mucosal area. Currently, common intracavitary drug delivery methods include instillation and spraying. While instillation allows for the use of body position and gravity to flow into the target area, it cannot distribute the medication evenly and cannot deliver a precise dose. Spraying is more commonly used clinically due to its ease of operation, but it also cannot deliver a precise dose to the target location, limiting its application scenarios. Therefore, developing a delivery device capable of precise and targeted drug delivery is of great significance for drug administration within narrow cavities. Utility Model Content
[0004] The purpose of this invention is to provide a cavity quantitative drug delivery device that solves the problem that existing technologies cannot achieve quantitative targeting when delivering drugs to narrow cavities.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0006] This utility model provides a cavity-based quantitative drug delivery device, including a drug delivery component and a drug infusion component, wherein the drug delivery component includes:
[0007] Protective tubes;
[0008] An outer tube, which is inserted into the protective tube;
[0009] An inner push rod, which passes through the outer sleeve;
[0010] An inner push rod clip is fitted onto the inner push rod and connected to the outer sleeve.
[0011] A spring, which is coiled on the inner push rod clip and connected to the end of the outer sleeve;
[0012] A retaining ring is fitted onto the inner push rod clip and abuts against the other end of the spring;
[0013] The drug delivery assembly includes: a drug storage cylinder;
[0014] An injection piston is slidably inserted into the drug reservoir, and one end of the injection piston abuts against the inner push rod.
[0015] An injection head is connected to the drug reservoir.
[0016] Furthermore, the outer sleeve is partially exposed outside the protective tube, and a button is connected to the exposed portion of the outer sleeve relative to the protective tube. The outer end face of the button has an inwardly concave force-bearing surface.
[0017] Furthermore, a first protrusion is provided at the end of the outer tube near the button, and a first retaining ring is provided on the inner wall of the protective tube at the end near the button. The first protrusion and the first retaining ring cooperate to limit the outer tube.
[0018] Furthermore, the outer diameter of the first protrusion is larger than the inner diameter of the first retaining ring.
[0019] Furthermore, the outer periphery of the protective tube is covered with an anti-slip sleeve, and the anti-slip sleeve is provided with a number of anti-slip protrusions.
[0020] Furthermore, one end of the inner push rod clamp is an elastic split structure, and the other end of the inner push rod clamp is provided with a second protrusion. The second protrusion cooperates with the outer sleeve to limit and clamp one end of the spring between the second protrusion and the outer sleeve.
[0021] Furthermore, the inner diameter of the coil is adapted to the outer diameter of the elastic split end of the inner push rod clamp.
[0022] Furthermore, a plurality of damping blocks are provided on the inner sidewall of the protective tube relative to the end of the inner push rod, and the damping blocks are used to abut against the inner push rod to generate a damping effect on the inner push rod.
[0023] Furthermore, a second retaining ring is provided on the inner wall of the protective tube near one end of the drug delivery assembly. The second retaining ring is used to limit the position of the drug storage cylinder.
[0024] Furthermore, the top of the injection head is closed, and a drug outlet is provided on the side of the injection head.
[0025] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:
[0026] This utility model discloses a cavity quantitative drug delivery device, which integrates a drug delivery component and a drug delivery component. By pushing the inner push rod in the drug delivery component, the injection piston in the drug delivery component is pushed so that the drug liquid in the syringe can be injected into the narrow cavity, thereby realizing quantitative and targeted drug delivery. The device is simple to operate, can accurately control the drug dosage, and meets clinical needs. Attached Figure Description
[0027] The following sections will describe some specific embodiments of the present invention in a detailed manner by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or components. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:
[0028] Figure 1 This is a schematic diagram (a) of a cavity quantitative drug delivery device provided by this utility model;
[0029] Figure 2 This is a schematic diagram (II) of the structure of a cavity quantitative drug delivery device provided by this utility model;
[0030] Figure 3 This is a schematic diagram (III) of a cavity quantitative drug delivery device provided by this utility model;
[0031] Figure 4 This is a schematic diagram of the structure of the protective tube provided by this utility model;
[0032] Figure 5 This is a schematic diagram of the outer sleeve provided by this utility model;
[0033] Figure 6 This is a schematic diagram of the internal push rod clamp in the closed state provided by this utility model;
[0034] Figure 7 This is a schematic diagram of the structure of the inner push rod clamp head in the open state provided by this utility model;
[0035] Figure 8 This is a schematic diagram of the structure of the medicine storage cylinder provided by this utility model;
[0036] The reference numerals in the attached figures are explained as follows:
[0037] 1. Protective tube; 101. First retaining ring; 102. Second retaining ring; 2. Outer tube; 201. First protrusion; 3. Inner push rod; 4. Inner push rod clamp; 401. Second protrusion; 5. Spring; 6. Closure ring; 7. Drug reservoir; 8. Injection piston; 9. Injection head; 901. Drug outlet; 10. Button; 11. Anti-slip sleeve; 12. Damping block. Detailed Implementation
[0038] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0039] The cavity quantitative drug delivery device disclosed in this utility model includes a drug delivery component and a drug delivery component.
[0040] See Figures 1 to 8 Specifically, the aforementioned drug delivery assembly includes a protective tube 1, an outer tube 2, an inner push rod 3, an inner push rod clamp 4, a spring 5, and a retaining ring 6.
[0041] For the aforementioned protective tube 1, an anti-slip sleeve 11 is fitted around its outer periphery, and the anti-slip sleeve 11 is provided with several anti-slip protrusions. This design serves two purposes: firstly, to prevent the device from slipping during drug delivery, and secondly, to protect the protective tube 1. Of course, the anti-slip sleeve 11 is not the only option; other anti-slip sleeve materials can also be used, such as silicone, TPE, TPU, or PVC, as long as they provide good anti-slip and protective functions.
[0042] The outer tube 2 is inserted into the protective tube 1 and partially protrudes from the protective tube 1. A button 10 is connected to the exposed portion of the outer tube 2 relative to the protective tube 1. The button 10 is designed to apply a corresponding thrust to the outer tube 2. The end face of the button 10 can be round, diamond-shaped, or square, and the specific shape can be adjusted according to the user's needs.
[0043] In addition, the end face of the button 10 is also formed with an inwardly concave force-bearing surface, the radius of which is controlled between 0.4 and 4 cm, and the area of which is controlled between 1 cm². 2 ~4cm 2 The recessed design of button 10 makes it more ergonomic and easier to operate manually.
[0044] A first retaining ring 101 is provided on the inner wall of the protective tube 1 near the button 10, and a first protrusion 201 is provided on the outer tube 2 near the button 10, with the outer diameter of the first protrusion 201 being larger than the inner diameter of the first retaining ring 101. The first protrusion 201 cooperates with the first retaining ring 101 to limit the outer tube 2 within the protective tube 1.
[0045] The aforementioned inner push rod 3 is inserted into the outer sleeve 2 and abuts against one end of the outer sleeve 2 to receive the thrust applied by the outer sleeve 2. The inner push rod 3 shown in this utility model is actually a cylinder with a diameter generally controlled between 5 and 10 mm. Its material can be ABS, PC, LCP, nylon, PE, PET, PEI, LDPE, HDPE, or PP.
[0046] It should be noted that the inner diameter of the outer tube 2 should be set between the total diameter of one inner push rod 3 and the total diameter of two inner push rods 3, that is, the diameter of one inner push rod 3 < the inner diameter of the outer tube 2 < the diameter of two inner push rods 3. This ensures that only one inner push rod 3 can pass through the outer tube 2, and that the inner push rod 3 will not get stuck in the outer tube 2.
[0047] The aforementioned inner push rod clamp 4 is provided to enable the pulsating extension of the inner push rod 3, and works in conjunction with the spring 5, the retaining ring 6, and the outer sleeve 2. Specifically, the inner push rod clamp 4 is fitted onto the inner push rod 3 and engages with the outer sleeve 2. One end of the inner push rod clamp 4 has a flexible three-pronged structure for locking / releasing the inner push rod 3. The other end of the inner push rod clamp 4 is provided with a second protrusion 401 to engage the inner push rod clamp 4 with the outer sleeve 2. The second protrusion 401 can be provided as a single protrusion or multiple protrusions, as long as it ensures a secure engagement between the inner push rod clamp 4 and the outer sleeve 2. The diameter of the end of the inner push rod clamp 4 closest to the second protrusion 401 is 0.1~0.5mm larger than the diameter of the inner push rod 3, which facilitates the passage of the inner push rod 3 through the inner push rod clamp 4.
[0048] The three-jaw split structure of the aforementioned inner push rod clamp 4 has each segment having a length controlled between 3 and 15 mm, and the segment length determines the extension distance of the inner push rod 3. The material of the inner push rod clamp 4 is generally metal or plastic, and the opening angle of the three-jaw split structure is generally controlled between 15 and 30°.
[0049] The aforementioned spring 5 is coiled on the inner push rod clamp 4. One end of the spring 5 abuts against the outer sleeve 2, and the other end of the spring 5 abuts against the retaining ring 6 sleeved on the elastic three-jaw split of the inner push rod clamp 4.
[0050] Pushing the outer tube 2 with button 10 forces the spring 5, which in turn forces the inner push rod latch 4. Simultaneously, the spring 5, due to the reaction force of the retaining ring 6, causes the elastic three-jaw clasp of the inner push rod latch 4 to open. Once open, the inner push rod 3 moves a short distance away from button 10. Releasing button 10 causes the outer tube 2 and spring 5 to gradually return to their original positions, and the three-jaw clasp of the inner push rod latch 4 closes, locking the inner push rod 3 and preventing further movement.
[0051] The inner diameter of the aforementioned retaining ring 6 is compatible with the outer diameter of the three-jaw split of the inner push rod chuck 4 after it is closed. The retaining ring 6 can be made of rubber, silicone, TPE, TPU, or PVC.
[0052] Furthermore, to smoothly extend the inner push rod 3 from the outer sleeve 2, this invention includes several damping blocks 12 on the inner wall of the protective tube 1, relative to the end of the inner push rod 3. The damping blocks 12 are designed to abut against the inner push rod 3 to provide corresponding damping. The upper end of the damping block 12 is thinner than the lower end, resulting in increasing damping on the inner push rod 3 during its movement. Since the damping blocks 12 are made of resin or rubber, they can produce a certain degree of elastic deformation on the inner push rod 3, thus making its movement more stable. Alternatively, the damping blocks 12 can be a single, integrally molded damping unit.
[0053] Furthermore, since the other end of the aforementioned coil 6 abuts against the damping block 12, when the spring 5 acts downward, pushing the coil 6 toward the damping block 12, the damping block 12 will push the coil 6 away from the elastic three-jaw split of the inner push rod chuck 4 to release the inner push rod 3.
[0054] The aforementioned drug delivery assembly includes a drug reservoir 7, an injection piston 8, and an injection head 9. Specifically, the injection piston 8 is slidably inserted into the drug reservoir 7, and one end of the injection piston 8 abuts against the aforementioned inner push rod 3. The injection head 9 is connected to the drug reservoir 7. The length of the drug reservoir 7 is generally 3~50cm, and the specific length can be flexibly selected according to the administration site. The material of the drug reservoir 7 can be stainless steel, PP, PE, or silicone, etc.
[0055] To connect the drug delivery component and the drug infusion component, a second retaining ring 102 is provided on the inner wall of the protective tube 1 near the end of the drug delivery component to limit the position of the drug storage cylinder 7. By rotating, the upper edge of the drug storage cylinder 7 can be engaged with the second retaining ring 102.
[0056] In this invention, the top of the injection head 9 is closed, and a drug outlet 901 is opened on the side of the injection head 9. The top of the injection head 9 is blunt, and the opening is on the side, which facilitates drug administration while avoiding scratching the mucous membrane of the cavity and ensuring operational safety. In addition, a sealing cap is also provided on the outside of the injection head 9 to prevent drug leakage and facilitate drug storage.
[0057] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the protection scope of this utility model.
Claims
1. A cavity-based quantitative drug delivery device, comprising a drug delivery component and a drug infusion component, characterized in that, The drug delivery assembly includes: a protective tube (1); Outer tube (2), the outer tube (2) is inserted into the protective tube (1); Inner push rod (3), the inner push rod (3) is inserted into the outer tube (2); Inner push rod clip (4), the inner push rod clip (4) is sleeved on the inner push rod (3) and connected to the outer sleeve (2); Spring (5), the spring (5) is coiled on the inner push rod clip (4) and connected to the end of the outer tube (2); The retaining ring (6) is sleeved on the inner push rod clip (4) and abuts against the other end of the spring (5); The drug delivery assembly includes: a drug storage cylinder (7); Injection piston (8), which is slidably inserted into the drug reservoir (7), and one end of the injection piston (8) abuts against the inner push rod (3); Injection head (9), which is connected to the drug reservoir (7).
2. The cavity-based quantitative drug delivery device according to claim 1, characterized in that, The outer tube (2) is partially exposed above the protective tube (1), and a button (10) is connected to the exposed portion of the outer tube (2) relative to the protective tube (1). The outer end face of the button (10) has an inwardly concave force-bearing surface.
3. The cavity-based quantitative drug delivery device according to claim 2, characterized in that, The outer tube (2) has a first protrusion (201) at one end near the button (10), and the inner wall of the protective tube (1) has a first retaining ring (101) at one end near the button (10). The first protrusion (201) and the first retaining ring (101) cooperate to limit the outer tube (2).
4. The cavity-based quantitative drug delivery device according to claim 3, characterized in that, The outer diameter of the first protrusion (201) is larger than the inner diameter of the first retaining ring (101).
5. A cavity-based quantitative drug delivery device according to claim 1, characterized in that, The outer periphery of the protective tube (1) is covered with an anti-slip sleeve (11), and the anti-slip sleeve (11) is provided with a number of anti-slip protrusions.
6. The cavity-based quantitative drug delivery device according to claim 1, characterized in that, One end of the inner push rod clamp (4) is an elastic split structure, and the other end of the inner push rod clamp (4) is provided with a second protrusion (401). The second protrusion (401) cooperates with the outer tube (2) to limit and clamp one end of the spring (5) between the second protrusion (401) and the outer tube (2).
7. A cavity-based quantitative drug delivery device according to claim 6, characterized in that, The inner diameter of the coil (6) is adapted to the outer diameter of the elastic split end of the inner push rod clip (4).
8. A cavity-based quantitative drug delivery device according to claim 1, characterized in that, A plurality of damping blocks (12) are provided on the inner side wall of the protective tube (1) relative to the end of the inner push rod (3). The damping blocks (12) are used to abut against the inner push rod (3) to generate a damping effect on the inner push rod (3).
9. A cavity-based quantitative drug delivery device according to claim 1, characterized in that, A second retaining ring (102) is provided on the inner wall of the protective tube (1) near the end of the drug delivery assembly. The second retaining ring (102) is used to limit the position of the drug storage cylinder (7).
10. A cavity-based quantitative drug delivery device according to claim 1, characterized in that, The top of the injection head (9) is closed, and the side of the injection head (9) has a drug outlet (901).