A zero-leakage medicine applicator

Abstract

This invention is a zero-leakage liquid applicator, comprising a sleeve and a medicine storage tube. One end of the sleeve is equipped with an applicator block and a spike. The spike punctures the aluminum foil sealing the end of the medicine storage tube, allowing the liquid medicine inside to flow out and be absorbed onto the applicator block. The area where the aluminum foil and the end face of the medicine storage tube meet is designated as a connecting portion. A reinforcing cap is provided on the outside of the liquid outlet end of the medicine storage tube. One end of the reinforcing cap presses against the connecting portion to apply a clamping force towards the medicine storage tube. The other end of the reinforcing cap is fixedly connected to the medicine storage tube. The reinforcing cap directly presses against the connecting portion between the aluminum foil and the end face of the medicine storage tube, applying a continuous clamping force towards the medicine storage tube. This clamping action enhances the tightness of the fit between the aluminum foil and the tube end, effectively resisting the impact of gas expansion on the sealing interface even when internal pressure increases due to high temperature, thus effectively preventing the risk of leakage during the sterilization process.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically a zero-leakage liquid applicator. Background Technology

[0002] In the fields of medical care and daily first aid, applicators are widely used as convenient local drug delivery tools, especially suitable for disinfecting and applying medication to skin wounds and lesions. A typical applicator usually consists of a sleeve for holding and a reservoir pre-filled with a medication (such as iodine or alcohol). One end of the reservoir is inserted into the sleeve, while the other end is usually sealed with a fragile material such as aluminum foil to maintain the sterility of the medication. The distal end of the sleeve has an applicator pad and a spike. In use, by pushing the reservoir towards the spike, the spike punctures the sealing foil at the end of the reservoir, allowing the medication to flow out and soak the applicator pad, thus facilitating wound treatment.

[0003] During the production of the applicator, after the drug reservoir is filled with medication and sealed with aluminum foil, it needs to be sterilized with ethylene oxide (EO) to ensure the sterility and safety of the product. During ethylene oxide sterilization, the ambient temperature rises significantly, reaching 121°C. Under these high-temperature conditions, the residual gas sealed inside the reservoir will generate significant internal pressure due to thermal expansion, easily leading to leakage at the seal.

[0004] Therefore, how to improve the structure of existing applicators, especially to enhance the reliability of their liquid reservoir sealing system under high temperature and high pressure sterilization conditions and prevent leakage caused by internal gas expansion during sterilization, has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0005] To address the technical problems in the background art, this invention discloses a zero-leakage medicine applicator.

[0006] This invention provides a zero-leakage medicine applicator, including a sleeve and a medicine storage tube, with the medicine storage tube inserted into the sleeve; one end of the sleeve is provided with an applicator block and a spike; the spike punctures the aluminum foil sealing the end of the medicine storage tube, allowing the medicine in the medicine storage tube to flow out and be absorbed onto the applicator block; the area where the aluminum foil and the end face of the medicine storage tube are in contact is provided as a connecting part. The outer side of the liquid outlet end of the drug storage tube is equipped with a reinforcing cap; One end of the reinforcing cap presses against the connecting part to apply a clamping force toward the medicine storage tube. This clamping force prevents the connecting part from separating from the medicine storage tube during sterilization. The other end of the reinforcing cap is fixedly connected to the medicine storage tube.

[0007] Furthermore, two wavy extensions are symmetrically provided at the edge of the aluminum foil; The medicine storage tube is equipped with a baffle. When the drug storage tube is sterilized, the expansion section expands outward, increasing the volume inside the drug storage tube; When the spikes pierce the aluminum foil and apply pressure to it, the aluminum foil remains stationary.

[0008] Furthermore, the spikes and extensions are staggered.

[0009] Furthermore, the baffle is composed of a connecting plate and a support plate; The connecting plate extends radially along the medicine storage tube and is in the shape of a minor arc, with its arc-shaped surface connected to the inner wall of the medicine storage tube. One end of the support plate is connected to the straight edge of the connecting plate, and the other end is sealed to the straight part of the aluminum foil. An air cavity is formed between the baffle and the aluminum foil; The baffle is equipped with a vent, which connects the air chamber and the inner cavity of the drug storage tube.

[0010] Furthermore, ventilation holes are provided on the support plate.

[0011] Furthermore, a mounting ring is radially protruding from the outer wall of the liquid outlet end of the drug storage tube; The other end of the reinforcing cover abuts against the inner wall of the mounting ring to achieve a fixed connection.

[0012] Furthermore, the aluminum foil extends outward from the outer edge of the connecting part to form a first extension, a second extension, and a third extension in sequence; The first extension extends axially away from the liquid outlet end; The end of the first extension is bent 180° in the opposite direction to form the second extension; The end of the second extension is bent radially inward at 90° to form the third extension; One end of the reinforcing cover presses against the third extension.

[0013] Furthermore, an extrusion groove is provided on the outer periphery of the reinforcing cover, and the extrusion groove is an annular groove coaxially arranged with the reinforcing cover; The radially inner surface of the reinforcing cover forms a convex ring that presses against the first extension and the second extension.

[0014] The beneficial effects of this invention are: one end of the reinforcing cap directly presses against the connection between the aluminum foil and the end face of the medicine storage tube, applying a continuous, pressing force towards the medicine storage tube. This pressing action enhances the tightness of the fit between the aluminum foil and the tube end, effectively resisting the impact of gas expansion on the sealing interface even when the internal air pressure rises due to high temperature, thereby effectively preventing the risk of leakage during the sterilization process. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is the front view of the present invention; Figure 3 yes Figure 2 Enlarged view of point A in the middle; Figure 4 This is a front sectional view of the drug storage tube; Figure 5 yes Figure 4 Enlarged view of point B in the middle; Figure 6 This is the front sectional view of the reinforcing cover; In the diagram: 1. Sleeve; 2. Drug storage tube; 3. Application block; 4. Spike; 5. Aluminum foil; 6. Reinforcing cap; 25. Mounting ring; 26. Baffle; 51. Connecting part; 52. First extension; 53. Second extension; 54. Third extension; 55. Extension part; 61. Extrusion groove; 261. Connecting plate; 262. Support plate; 263. Air chamber; 264. Vent hole. Detailed Implementation

[0017] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0018] like Figure 1-3 As shown, and with Figure 3 For reference, this invention discloses an applicator that dispenses liquid with two consecutive presses, comprising a sleeve 1 and a drug storage tube 2, the drug storage tube 2 being inserted into the sleeve 1 from top to bottom. An integrally formed, inclined fixing plate is provided at the lower end of the sleeve 1, and an applicator block 3 is provided on the outer side of the fixing plate. A fixing frame is provided inside the sleeve 1, near the fixing plate, and the fixing frame has three circumferentially distributed through holes. These through holes, along with the area of ​​the sleeve 1 located on the lower side of the fixing frame and the central hole of the fixing plate, form a flow channel. The liquid medicine flows through the flow channel to the applicator block 3 and is absorbed onto the applicator block 3. An upwardly extending spike 4 is provided at the center of the fixing frame. The spike 4 is used to pierce the aluminum foil 5 sealing the lower end of the drug storage tube 2, allowing the liquid medicine in the drug storage tube 2 to flow out and be absorbed onto the applicator block 3.

[0019] like Figure 4 and Figure 5As shown, a mounting ring 25 is radially protruding from the outer wall of the left outlet end of the drug storage tube 2. An aluminum foil 5 is placed on the lower end face of the mounting ring 25 to achieve a seal. The area where the aluminum foil 5 contacts the end face of the drug storage tube 2 is designated as the connecting portion 51. A reinforcing cap 6 is also provided at the lower end of the drug storage tube 2; the inner side of the lower end of the reinforcing cap 6 presses against the connecting portion 51 to apply a clamping force towards the drug storage tube 2; the inner side of the upper end of the reinforcing cap 6 presses against the upper end face of the mounting ring 25 to achieve a fixed connection. In this embodiment, the reinforcing cap 6 is made of aluminum, initially cylindrical, with its lower end forming an annular plate shape, which is fitted upwards onto the mounting ring 25; subsequently, a pressure roller is used to press the upper end of the reinforcing cap 6, causing it to bend inwards and adhere to the upper end face of the mounting ring 25. During the pressing process, a tensile force is generated in the bending direction of the upper end of the reinforcing cover 6. This causes the lower end of the reinforcing cover 6 to adhere to and press against the connecting part 51 after forming, applying a clamping force towards the medicine storage tube 2. This applies a continuous clamping force towards the medicine storage tube 2 to the aluminum foil 5. This clamping action enhances the tightness of the fit between the aluminum foil 5 and the tube end, effectively resisting the impact of gas expansion on the sealing interface even when the internal pressure increases due to high temperature, thus effectively preventing the risk of leakage during sterilization. Furthermore, the contact between the upper end of the reinforcing cover 6 and the upper surface of the mounting ring 25 not only facilitates the installation of the reinforcing cover 6 but also improves the positional stability of the mounting ring 25, ensuring that the clamping force of the reinforcing cover 6 on the connecting part 51 of the aluminum foil 5 is continuous and uniform, avoiding leakage of the aluminum foil 5 due to component displacement.

[0020] Among them, such as Figure 3 As shown, aluminum foil 5 extends outward from the outer edge of connecting part 51 to form a first extension 52, a second extension 53, and a third extension 54. The first extension 52 extends upward; the upper end of the first extension 52 is bent downward by 180° to form the second extension 53; the lower end of the second extension 53 is bent radially inward by 90° to form the third extension 54; the inner side of the lower end of the reinforcing cover 6 presses against the third extension 54. The arrangement of the first extension 52, the second extension 53, and the third extension 54 significantly increases the overall structural thickness and tensile and deformation resistance of aluminum foil 5. Compared with the traditional single-layer flat aluminum foil 5 sealing, it effectively avoids the pressure generated by the expansion of gas inside the medicine storage tube 2 under sterilization high temperature from directly acting on the connecting part 51 where aluminum foil 5 and medicine storage tube 2 are bonded, preventing sealing failure problems such as edge lifting, cracking, and delamination of the connecting part 51. Furthermore, since the other end of the reinforcing cover 6 will exert a radially outward pulling force on the aluminum foil 5 under the action of friction during the extrusion molding of the pressure roller, the aluminum foil 5 may break. Therefore, the third extension 54 also plays a protective role. The friction of the reinforcing cover 6 will only act on the third extension 54, thereby ensuring that the aluminum foil 5 will not break.

[0021] During the extrusion molding process of the reinforcing cover 6, its radial side will form an arc shape. This arc shape will create a gap between this part and the outer side of the mounting ring 25, thus affecting the structural strength of the aluminum foil 5. Figure 6 As shown, an extrusion groove 61 is provided on the outer periphery of the reinforcing cover 6. The extrusion groove 61 is an annular groove coaxially arranged with the reinforcing cover 6. A convex ring is formed on the radial inner side of the reinforcing cover 6 to press against the first extension 52 and the second extension 53. This groove can be machined in the initial state of the reinforcing cover 6, or it can be formed by radial extrusion after the reinforcing cover 6 is fixed on the mounting ring 25.

[0022] When disinfection is performed after the medicine is filled into the medicine storage tube 2, excessive air pressure may occur. Although the connection part 51 is constrained by the reinforcing cover 6 and leakage will not occur, the aluminum foil 5 may still break. Therefore, two wavy extensions 55 are symmetrically arranged at the edge of the aluminum foil 5. At the same time, a baffle 26 is provided inside the medicine storage tube 2 near the aluminum foil 5. The baffle 26 is composed of a connecting plate 261 and a support plate 262. The connecting plate 261 extends radially along the medicine storage tube 2 and is in the shape of a minor arc, with its arc surface connected to the inner wall of the medicine storage tube 2. The upper end of the support plate 262 is connected to the straight edge of the connecting plate 261, and the other end extends downward to seal the straight part of the aluminum foil 5. An air cavity 263 is formed between the baffle 26, the aluminum foil 5, and the inner wall of the medicine storage tube 2. A vent 264 is provided on the baffle 26, which connects the air cavity 263 and the inner cavity of the medicine storage tube 2. With the liquid outlet facing upwards, the medicine storage tube 2 is sealed and fixed to the aluminum foil 5 via a heat-sealing process. Simultaneously, the aluminum foil 5 is also sealed and fixed to the end face of the support plate 262. During disinfection, the aluminum foil 5 faces upwards. When the air pressure inside the medicine storage tube 2 increases, gas enters the air chamber 263 through the vent 264 and drives the expansion section 55 to expand upwards, thereby increasing the internal volume of the medicine storage tube 2. This prevents excessive air pressure inside the medicine storage tube 2, thus protecting the aluminum foil 5 from rupture.

[0023] When the spike 4 needs to pierce the aluminum foil 5, since the extension 55 is located at the edge of the aluminum foil 5 and is offset from the spike 4, and the extension 55 is supported by the support plate 262, the spike 4 can stably pierce the central area of ​​the aluminum foil 5 when it pierces the aluminum foil 5, and the extension 55 will not be affected.

[0024] When the applicator is in use, the applicator block 3 is in a vertical position at the bottom. The medicine can easily enter the air chamber 263, and the medicine is difficult to flow out of the medicine storage tube. Therefore, the air hole 264 is set on the support plate 262 to avoid or reduce the amount of medicine entering the air chamber 263.

[0025] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A zero-leakage medicine applicator, comprising a sleeve (1) and a medicine storage tube (2), wherein the medicine storage tube (2) is inserted into the sleeve (1); one end of the sleeve (1) is provided with an applicator block (3) and a spike (4); the spike (4) punctures the aluminum foil (5) sealing the end of the medicine storage tube (2), causing the medicine in the medicine storage tube (2) to flow out and be absorbed onto the applicator block (3), characterized in that: The area where the aluminum foil (5) and the end face of the medicine storage tube (2) are attached is set as the connecting part (51); The outer side of the liquid outlet end of the drug storage tube (2) is provided with a reinforcing cap (6); One end of the reinforcing cap (6) presses against the connecting part (51) to apply a clamping force to the connecting part (51) in the direction of the medicine storage tube (2), which prevents the connecting part (51) from separating from the medicine storage tube (2) during sterilization; The other end of the reinforcing cover (6) is fixedly connected to the medicine storage tube (2).

2. The zero-leakage medicine applicator according to claim 1, characterized in that: The aluminum foil (5) has two wavy extensions (55) symmetrically arranged at its edge. A baffle (26) is provided inside the drug storage tube (2); When the medicine storage tube (2) is sterilized, the extension part (55) expands outward to increase the volume inside the medicine storage tube (2); When the spike (4) pierces the aluminum foil (5) and applies pressure to the aluminum foil (5), the aluminum foil (5) remains stationary.

3. The zero-leakage medicine applicator according to claim 2, characterized in that: The spike (4) and the extension (55) are staggered.

4. The zero-leakage medicine applicator according to claim 3, characterized in that: The baffle (26) is composed of a connecting plate (261) and a support plate (262); The connecting plate (261) extends radially along the medicine storage tube (2) and is in the shape of a minor arc, with its arc surface connected to the inner wall of the medicine storage tube (2); One end of the support plate (262) is connected to the straight edge of the connecting plate (261), and the other end is sealed to the straight part of the aluminum foil (5). An air cavity (263) is formed between the baffle (26) and the aluminum foil (5); The baffle (26) is provided with a vent (264), which connects the air chamber (263) and the inner cavity of the medicine storage tube (2).

5. A zero-leakage medicine applicator according to claim 4, characterized in that: The ventilation hole (264) is provided on the support plate (262).

6. The zero-leakage medicine applicator according to claim 1, characterized in that: The outer wall of the liquid outlet end of the drug storage tube (2) is provided with a mounting ring (25) protruding radially; The other end of the reinforcing cover (6) abuts against the inner wall of the mounting ring (25) to achieve a fixed connection.

7. A zero-leakage medicine applicator according to claim 6, characterized in that: The aluminum foil (5) extends outward from the outer edge of the connecting part (51) to form a first extension part (52), a second extension part (53) and a third extension part (54). The first extension (52) extends axially away from the liquid outlet end; The end of the first extension (52) is bent 180° in the opposite direction to form the second extension (53); The end of the second extension (53) is bent radially inward by 90° to form the third extension (54). One end of the reinforcing cover (6) presses against the third extension (54).

8. A zero-leakage medicine applicator according to claim 7, characterized in that: The reinforcing cover (6) has an extrusion groove (61) on its outer periphery, and the extrusion groove (61) is an annular groove coaxially arranged with the reinforcing cover (6). The radially inner side of the reinforcing cover (6) forms a protruding ring that presses against the first extension (52) and the second extension (53).

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