Plug of needle-free pre-potting medicine core

Abstract

The invention relates to the technical field of needleless injection, in particular to a plug of a needleless pre-filled medicine core, which comprises a spray head part at the front end of the medicine core and a plug part, the plug part is detachably mounted at the front end of the spray head part, the spray head part comprises a medicine tube, and a containing cavity is formed in the medicine tube. The diameter of one end of the containing cavity is gradually reduced and converged to form an injection opening of a micropore structure, the plug part comprises a rubber plug body used for blocking the injection opening and an installation part installed on the outer side of the rubber plug body, and a conical protrusion is arranged in the rubber plug body and used for abutting against the outer portion of the injection opening for sealing. According to the needleless pre-filling medicine core, through the unique plug design, the sealing performance and sterility of medicine liquid are remarkably improved, the conical protrusion of the plug is matched with the concave hole in the front end of the injection opening to form a conical sealing interface, compared with a traditional plane sealing mode, the more reliable sealing effect is provided through the structure, and the sealing effect is better. And liquid medicine leakage and external pollution are effectively prevented.

Description

Technical Field

[0001] The invention relates to the technical field of needle-free injection, and in particular to a plug for a needle-free pre-filled medicine core. Background Art

[0002] In existing needle-free injection technologies, the injection port is usually designed as a flat port. Although this design is simple, it has some limitations in practical applications. The flat port design may not provide sufficient sealing performance, resulting in easy leakage of the drug solution during storage or use, and also increases the risk of external contaminants entering the syringe. In addition, the flat port design may not be well adapted to the requirements of needle-free syringes for injection port stability when spraying drugs at high pressure, which may affect the precise delivery of drugs and the therapeutic effect. Summary of the invention

[0003] In view of the above-mentioned problems existing in the plugging of the existing needle-free prefilled medicine core, the present invention is proposed.

[0004] Therefore, the object of the present invention is to provide a plug for a needle-free prefilled drug core, the purpose of which is to overcome the limitations of the existing flat injection port design in terms of sealing, stability and ease of operation.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a plug for a needle-free pre-filled drug core, comprising a nozzle component and a plug component at the front end of the drug core, wherein the plug component is detachably mounted at the front end of the nozzle component, wherein the nozzle component comprises a drug tube, wherein a cavity is arranged inside the drug tube, wherein the diameter of one end of the cavity gradually decreases and converges to form an injection port with a microporous structure,

[0006] The plugging component includes a rubber plug body for plugging the injection port and a mounting piece mounted on the outside of the rubber plug body. A conical protrusion is arranged inside the rubber plug body for pressing against the outside of the injection port for sealing.

[0007] As a preferred solution for the plug of the needle-free prefilled drug core of the present invention, the drug tube is provided with a protective layer on the outer layer of the injection port, an installation cavity is formed between the protective layer and the injection port, and the installation part is detachably installed in the installation cavity.

[0008] As a preferred solution for the plug of the needle-free prefilled medicine core of the present invention, the protective layer is flush with the injection port, and the interior of the protective layer is divided into an inner step portion and an inner threaded portion from the outer free end to the inner fixed end.

[0009] As a preferred solution of the plug of the needle-free prefilled medicine core of the present invention, wherein: the front end of the mounting piece is provided with an external threaded portion, and the external threaded portion is threadedly connected with the internal threaded portion.

[0010] As a preferred solution of the plug of the needle-free prefilled medicine core of the present invention, the mounting member is provided with an outer step portion, and the outer step portion abuts against the inner step portion.

[0011] As a preferred solution for the plug of the needle-free prefilled medicine core of the present invention, the outer wall diameter of the injection port gradually decreases from the fixed end to the free end, and the space in the installation cavity gradually decreases from the outside to the inside.

[0012] As a preferred solution of the plug of the needle-free prefilled medicine core of the present invention, a conical concave hole is provided on the injection port, and the conical protrusion inside the rubber plug body is inserted into the conical concave hole.

[0013] As a preferred solution of the plug of the needle-free prefilled medicine core of the present invention, a circle of convex ring is arranged inside the mounting piece, a circle of annular groove is arranged on the outer wall of the rubber plug body, and the convex ring is inserted into the annular groove.

[0014] As a preferred solution for the plug of the needle-free prefilled medicine core of the present invention, the cavity gradually shrinks and converges from an inner diameter of 4.65 mm to form an injection port with a 0.1 mm microporous structure.

[0015] As a preferred solution for the plug of the needle-free prefilled medicine core of the present invention, wherein:.

[0016] Beneficial effects of the present invention: (1) Enhanced sealing and sterility: The needle-free prefilled drug core of the present application significantly improves the sealing and sterility of the drug solution through its unique plug design. The conical protrusion of the plug cooperates with the concave hole design at the front end of the injection port to form a conical sealing interface. Compared with the traditional planar sealing method, this structure provides a more reliable sealing effect and effectively prevents drug leakage and external contamination.

[0017] (2) Improved ease of operation: The structural design between the plug and the nozzle makes the entire needle-free syringe easier to operate. The conical concave hole and the conical front end of the plug provide a better insertion and fixing mechanism, simplifying the installation process and reducing operational complexity.

[0018] (3) Enhanced structural stability and convenient insertion: The design of the outer wall diameter of the injection port gradually decreases from the fixed end to the free end, so that the installation cavity gradually shrinks from the outside to the inside. This structure helps to maintain the stability of the syringe when the drug is sprayed at high pressure, and at the same time facilitates the insertion of the plug component and protects the injection port.

[0019] (4) Strong sealing and good sealing effect: The threaded connection between the mounting part and the protective layer, the wrapping between the rubber plug body and the injection port, and the interference fit between the mounting part and the rubber plug body ensure that the plug is firmly installed in the mounting cavity. The injection port is sealed from multiple angles through threaded connection, surface-to-surface contact, and wrapping of the injection port.

[0020] (5) Improve injection accuracy: The internal design of the front end of the drug core gradually shrinks from an inner diameter of 4.65mm to an injection hole diameter of 0.1mm. This structural design of gradually shrinking to a small hole is specially developed to achieve high-precision needle-free injection. The 0.1mm micropore design makes the drug injection more concentrated and accurate, which helps to evenly distribute the drug in the body and improve the treatment effect.

[0021] (6) Reduce drug waste: The design of the microporous injection port reduces drug waste during the injection process, ensuring that more drugs are effectively delivered to the target area, thereby improving the economic efficiency of drug use. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0023] Figure 1 It is a structural schematic diagram of the installation state of the plug of the needle-free prefilled medicine core of the present invention.

[0024] Figure 2 The schematic diagram of the nozzle structure of the needle-free pre-filled drug core of the present invention is Figure 1 .

[0025] Figure 3 The structure of the plugging component of the needle-free prefilled drug core of the present invention is shown in FIG. Figure 1 .

[0026] Figure 4 It is a schematic cross-sectional structure diagram of the plugging component of the needle-free prefilled medicine core of the present invention.

[0027] Figure 5 for Figure 1 Schematic diagram of the cross-sectional structure.

[0028] In the figure:

[0029] 100, nozzle component; 101, medicine tube; 102, cavity; 103, injection port; 103a, concave hole; 104, protective layer; 104a, inner step portion; 104b, inner thread portion; 105, installation cavity;

[0030] 200, plug component; 201, rubber plug body; 201a, conical protrusion; 201b, annular groove; 202, mounting piece; 202a, external threaded portion; 202b, external step portion; 202c, convex ring. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0032] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0033] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0034] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0035] Example 1

[0036] Reference Figure 1-Figure 5 , which is the first embodiment of the present invention, provides a plug for a needle-free prefilled drug core, including a nozzle component 100 at the front end of the drug core and a plug component 200, the plug component 200 is detachably installed at the front end of the nozzle component 100, wherein the nozzle component 100 includes a drug tube 101, a cavity 102 is arranged inside the drug tube 101, and the diameter of one end of the cavity 102 gradually decreases and converges to form an injection port 103 with a microporous structure, the plug component 200 includes a rubber plug body 201 for plugging the injection port 103 and a mounting member 202 installed on the outside of the rubber plug body 201, and a conical protrusion 201a is arranged inside the rubber plug body 201 for pressing against the outside of the injection port 103 for sealing.

[0037] In this embodiment, the needle-free prefilled drug core achieves excellent sealing and aseptic properties through an innovative plug design, wherein the conical protrusion 201a of the plug is tightly matched with the concave hole 103a at the front end of the injection port 103 to form a conical sealing interface. Compared with the traditional plane sealing method, this design significantly improves the reliability of the seal and effectively prevents the leakage of the drug solution and external contamination. In addition, this structural design also simplifies the operation process of the needle-free syringe. The conical concave hole 103a and the conical front end of the plug not only provide a stable insertion and fixing mechanism, but also reduce the complexity of installation, making the entire operation more convenient. The diameter of the injection port 103 gradually decreases from the fixed end to the free end, so that the space of the installation cavity 105 gradually decreases. This design not only helps to maintain the structural stability of the syringe when the drug is sprayed at high pressure, but also facilitates the insertion of the plug component 200 and the protection of the injection port 103. The threaded connection between the mounting piece 202 and the protective layer 104, the tight wrapping of the rubber plug body 201 around the injection port 103, and the interference fit and snap fit between the mounting piece 202 and the rubber plug body 201 together ensure that the plug is securely installed in the mounting cavity 105, achieving comprehensive sealing of the injection port 103 from multiple angles, thereby providing an excellent sealing effect.

[0038] Among them, the medicine tube 101 is provided with a protective layer 104 on the outer layer of the injection port 103, and a mounting cavity 105 is formed between the protective layer 104 and the injection port 103, and the mounting member 202 is detachably installed in the mounting cavity 105. It should be noted that in the design of the needle-free syringe, the injection port 103 is a key part to achieve accurate drug delivery, so it is very important to effectively protect and block it. By providing a protective layer 104 on the outside of the injection port 103, we can not only protect the injection port 103 from physical damage or contamination, but also ensure that the drug solution will not leak when not in use. In addition, the use of the protective layer 104 in conjunction with the plug component 200 provides additional protection and blocking measures for the injection port 103.

[0039] The following are additional effects of this design: (1) Enhanced protection of the injection port 103: The design of the protective layer 104 can prevent the injection port 103 from being impacted or worn during transportation or storage, thereby extending the service life of the syringe. (2) Improving the sterile barrier: The protective layer 104 can serve as an additional sterile barrier to prevent microorganisms or other contaminants from entering the syringe and ensure the sterility of the drug solution. (3) Optimizing the fixation of the plug component 200: The use of the protective layer 104 in conjunction with the plug component 200 can ensure that the plug component 200 is firmly fixed in the mounting cavity 105 between the injection port 103 and the protective layer 104, thereby preventing the plug component 200 from shifting or falling off during high-pressure injection. (4) Reducing the risk of drug leakage: The close combination of the plug component 200 and the protective layer 104 can reduce the risk of drug leakage during high-pressure injection and improve the safety and reliability of drug delivery. (5) Improving operational safety: Through the dual protection of the protective layer 104 and the plug component 200, the risk of the operator contacting the drug solution when handling the syringe can be reduced, thereby improving operational safety.

[0040] In the design of the needle-free syringe, the outer wall diameter of the injection port 103 gradually decreases from the fixed end to the free end, and the space in the installation cavity 105 gradually decreases from the outside to the inside. Such a geometric gradient design brings several significant advantages: First, this design facilitates the insertion and installation of the plug component 200. The plug component 200 can slide into the installation cavity 105 more easily along this tapered path, reducing the resistance and possible damage risk during the installation process. At the same time, this design also helps to ensure the correct positioning and fixation of the plug component 200 during the installation process, thereby ensuring the sealing of the syringe and the accuracy of drug delivery. Secondly, the spacing between the injection port 103 and the protective layer 104 increases as the diameter of the injection port 103 decreases, which provides more space for the contact between the injection port 103 and the skin. This design allows the syringe to contact the skin more smoothly and comfortably when in use, reducing the discomfort during the injection process.

[0041] Furthermore, the interior of the protective layer 104 is divided into an inner step portion 104a and an inner thread portion 104b from the outer free end to the inner fixed end. The front end of the mounting member 202 is provided with an outer thread portion 202a, which is screwed with the inner thread portion 104b, and the mounting member is provided with an outer step portion 202b, which is against the inner step portion 104a.

[0042] It should be noted that the mounting member 202 is screwed with the internal threaded portion 104b of the protective layer 104 through the external threaded portion 202a. When screwed to the limit position, the external step portion 202b of the mounting member 202 abuts against the internal step portion 104a of the protective layer 104, thereby forming a double-layer seal to ensure the protection of the injection port 103. The protective layer 104 is flush with the injection port 103, and such a setting can ensure that the injection port 103 can fully contact the skin surface of the human body during injection, thereby achieving the purpose of needle-free injection.

[0043] Furthermore, a circle of convex rings 202c are provided inside the mounting member 202, and a circle of annular grooves 201b are provided on the outer wall of the rubber plug body 201, and the convex ring 202c is inserted into the annular groove 201b. In the design of needle-free syringes, the stability and sealing of the plug component 200 are crucial. This design realizes the close assembly of the rubber plug body 201 and the mounting member 202 to form the plug component 200 by providing a circle of convex rings 202c inside the mounting member 202 and providing a corresponding annular groove 201b on the outer wall of the rubber plug body 201. With the wrapping of the injection port 103 by the rubber plug body 201 and the connection of the mounting member 202 with the inner thread of the protective layer 104, the entire plug component 200 is firmly fixed in the mounting cavity 105 between the injection port 103 and the protective layer 104, thereby realizing a firm seal of the nozzle component 100. This structural design provides the following advantages: (1) Improved structural strength: The combination of the convex ring 202c and the annular groove 201b enhances the structural strength of the plug component 200, enabling it to withstand the force generated by the high-pressure injection of the liquid medicine, and reducing structural deformation or damage caused by pressure changes. (2) By combining the two fixing methods of the rubber stopper body 201 wrapping the injection port 103 and the mounting member 202 being connected to the inner thread of the protective layer 104, and forming the rubber stopper body 201 and the mounting member 202 into a whole, the plug component 200 is firmly installed in the mounting cavity 105 in multiple ways, which can prevent the plug component 200 from accidentally falling off or shifting during the injection process, thereby reducing operational risks and improving safety of use. (3) Easy to assemble and maintain: This modular design makes the assembly and maintenance of the plug component 200 easier, which helps to improve production efficiency and reduce maintenance costs.

[0044] The medicine tube 101 has a cavity 102 inside, and one end of the cavity 102 has a diameter that gradually shrinks and converges to form an injection port 103 with a microporous structure. Specifically, the cavity 102 gradually shrinks and converges from an inner diameter of 4.65 mm to form an injection port 103 with a microporous structure of 0.1 mm.

[0045] This design has the following key advantages: (1) High-pressure drug delivery: The design of the microporous injection port 103 allows the needle-free syringe to operate under high pressure, so that the drug solution can penetrate the skin in a high-speed jet, achieving needle-free drug injection. This high-pressure jet can ensure that the drug is delivered directly to the subcutaneous tissue, improving the bioavailability and therapeutic effect of the drug. (2) Precise dosage control: The microporous injection port 103 can more accurately control the amount of drug sprayed, ensuring that the dose of each injection is accurate. This is particularly important for drugs that require precise dosage control, such as insulin or other hormone drugs. (3) Reduced drug waste: Since the diameter of the micropore is very small, it can significantly reduce the waste of drug solution during the injection process. In traditional syringes, the drug solution may drip or leak from the needle, but the microporous structure can effectively avoid this situation. (4) Prevent contamination: Due to its small size, the microporous injection port 103 can reduce the entry of external debris or microorganisms, thereby reducing the risk of contamination. This is crucial to maintaining the sterility of the drug solution.

[0046] Furthermore, the tip of the injection port 103 is designed to be a conical recessed hole 103a. This structure not only facilitates the precise injection of the drug, but also maintains the stability of the injection port 103 under high pressure. The conical protrusion 201a inside the rubber stopper body 201 is tightly plugged into the conical recessed hole 103a at the tip of the injection port 103, forming an efficient sealing system to prevent leakage of the drug under high pressure, while also reducing the risk of external contaminants entering the syringe. This combination not only ensures the sealing during high-pressure injection of the drug and prevents leakage of the drug, but also reduces the risk of damage to the injection port 103 due to pressure changes or improper operation.

[0047] In addition, the design of the conical concave hole 103a can concentrate the drug flow, so that it forms a thinner and more concentrated stream when spraying, thereby improving the accuracy of drug delivery, which is particularly important for drugs that require precise dosage control. Under high-pressure spraying conditions, the conical structure provides better mechanical stability, can withstand high pressure without deformation or damage, and ensure that the injection port 103 maintains its shape and position during the spraying process. The conical concave hole 103a helps to ensure the uniformity and continuity of drug flow and reduce turbulence and eddy currents of the drug during the spraying process, which helps to distribute the drug more evenly to the target area. The conical structure can reduce the rebound of the drug when it contacts the skin or other surfaces, ensuring that more drugs are delivered to the target area instead of being wasted. The conical structure can better adapt to the curvature of the skin, ensuring that the drug is delivered directly to the subcutaneous tissue instead of being reflected by the skin surface. The design of the conical concave hole 103a helps to reduce the pain during injection because it can penetrate the skin more smoothly and reduce damage to the skin.

[0048] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only several embodiments are described in detail in this disclosure, it should be easily understood by the personnel referring to this disclosure that many modifications are possible (for example, the size, scale, structure, shape and ratio of various elements, and parameter values ​​(for example, temperature, pressure, etc.), installation arrangement, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method step can be changed or reordered according to the alternative embodiment. Any "device plus function" clause is intended to cover the structure of the execution of the function described in this article, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiment. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications still falling within the scope of the appended claims.

[0049] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0050] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A plug for a needle-free pre-filled drug core, characterized in that: The invention comprises a nozzle component (100) at the front end of a drug core and a plug component (200), wherein the plug component (200) is detachably mounted at the front end of the nozzle component (100), wherein the nozzle component (100) comprises a drug tube (101), wherein a cavity (102) is arranged inside the drug tube (101), and the diameter of one end of the cavity (102) gradually decreases and converges to form an injection port (103) with a microporous structure, The plugging component (200) comprises a rubber plug body (201) for plugging the injection port (103); a conical protrusion (201a) is provided inside the rubber plug body (201) for pressing against the outside of the injection port (103) for sealing.

2. The plug for the needle-free prefilled drug core according to claim 1, characterized in that: The medicine tube (101) is provided with a protective layer (104) on the outer layer of the injection port (103), and an installation cavity (105) is formed between the protective layer (104) and the injection port (103).

3. The plug for the needle-free prefilled drug core according to claim 2, characterized in that: The plug component (200) further comprises a mounting member (202) mounted on the outside of the rubber plug body (201), wherein the mounting member (202) is used to mount the rubber plug body (201) in the mounting cavity (105).

4. The plug for the needle-free prefilled drug core according to claim 3, characterized in that: The protective layer (104) is flush with the injection port (103), and the interior of the protective layer (104) is divided into an inner step portion (104a) and an inner thread portion (104b) in sequence from the outer free end to the inner fixed end.

5. The plug for the needle-free prefilled drug core according to claim 4, characterized in that: The front end of the mounting member (202) is provided with an external threaded portion (202a), and the external threaded portion (202a) is threadedly connected to the internal threaded portion (104b).

6. The plug for the needle-free prefilled drug core according to claim 4, characterized in that: The mounting member (202) is provided with an outer step portion (202b), and the outer step portion (202b) abuts against the inner step portion (104a).

7. The plug for the needle-free prefilled drug core according to claim 2, characterized in that: The outer wall diameter of the injection port (103) gradually decreases from the fixed end to the free end, and the space in the installation cavity (105) gradually decreases from the outside to the inside.

8. The plug for the needle-free prefilled drug core according to claim 1, characterized in that: The injection port (103) is provided with a conical concave hole (103a), and the conical protrusion (201a) inside the rubber stopper body (201) is inserted into the conical concave hole (103a).

9. The plug for the needle-free prefilled drug core according to claim 3, characterized in that: A convex ring (202c) is provided inside the mounting member (202), and a ring groove (201b) is provided on the outer wall of the rubber stopper body (201), and the convex ring (202c) is inserted into the ring groove (201b).

10. The plug for the needle-free prefilled drug core according to claim 1, characterized in that: The cavity (102) gradually shrinks and converges from an inner diameter of 4.65 mm to form an injection port (103) with a 0.1 mm microporous structure.

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