Sterilization combination cap

Abstract

A sterilization combined cover comprises a base, a cover body, a piercing assembly and a plug, the base is provided with an assembly cavity, an assembly opening and a liquid outlet, the assembly opening and the liquid outlet are communicated with the assembly cavity, the cover body is arranged at the assembly opening and is sealingly connected with the base, the piercing assembly is slidingly arranged in the assembly cavity between the base and the cover body, a sharp part is arranged on the side of the piercing assembly facing the cover body for piercing the cover body, and the plug is arranged at the liquid outlet of the base for plugging the liquid outlet. The plug is arranged at the liquid outlet of the base for plugging, and the cover body at the assembly opening is matched to realize double sealing of the assembly cavity, effectively preventing external microorganisms and pollutants from entering the inside of the combined cover from the liquid outlet or the assembly opening after sterilization is completed, so that the sterile state inside is maintained. The piercing assembly is slidingly arranged in the assembly cavity, the plug can be removed during use, and the sharp part pierces the cover body to open the liquid passage, so that the piercing operation is completed in a sterile environment.

Description

Technical Field

[0001] This utility model relates to the field of packaging container technology, and in particular to a sterilization combination cap. Background Technology

[0002] In the field of medical infusion, the infusion puncture cap is a key component of the infusion packaging system, and its sterility directly affects patient medication safety. Currently, existing infusion puncture caps typically employ a design with one sealed end and the other open. During the manufacturing process, steam sterilization is commonly used to effectively sterilize the internal cavity of the infusion puncture cap. Due to the open design, sterilizing steam can easily enter the internal cavity of the cap, thereby killing any microorganisms that may be present and ensuring that sterility requirements are met.

[0003] However, this existing infusion puncture cap has significant drawbacks after sterilization. After steam sterilization, the infusion puncture cap is in an open state, with its internal cavity directly communicating with the outside air. Although the production environment usually has certain cleanliness requirements, various microorganisms, dust, and other contaminants are still unavoidable in the air. Over time, the infusion puncture cap is exposed to the air for extended periods, making it easy for external microorganisms to invade the internal cavity of the cap, thus destroying the originally sterile environment and leading to bacterial contamination.

[0004] Even with subsequent resealing, microorganisms may have already entered the interior of the cap during the open exposure period. Therefore, this later resealing cannot completely guarantee the sterility of the cavity inside the cap. Once a contaminated infusion cap is used during infusion, microorganisms may enter the patient's body along with the medication, potentially causing serious adverse reactions such as infection, posing a significant threat to the patient's health. Utility Model Content

[0005] The purpose of this invention is to disclose a sterilization combination cap that can solve the problem of a high probability of contamination inside the combination cap.

[0006] To achieve the above objectives, this utility model discloses a sterilization combination cap, comprising: The base is provided with an assembly cavity, an assembly port, and a liquid outlet, and the assembly port and the liquid outlet are both connected to the assembly cavity; A cover body, wherein the cover body is disposed at the assembly port and is sealed to the base; A puncture assembly is slidably disposed in the assembly cavity between the base and the cover, and the puncture assembly has a spike on the side facing the cover for puncturing the cover; A plug is provided at the liquid outlet of the base for sealing the liquid outlet.

[0007] By adopting the above solution, a plug is installed at the liquid outlet of the base for sealing, and the cap at the assembly port achieves a double seal for the assembly cavity. This effectively prevents external microorganisms and contaminants from entering the interior of the combined cap through the liquid outlet or assembly port after sterilization, thus maintaining its internal sterility. The puncture component slides within the assembly cavity and can be opened during use by removing the plug and puncturing the cap with the spike, ensuring that the puncture operation is completed in a sterile environment. The overall structure solves the technical problem of traditional open-type combined caps being easily contaminated after sterilization, improving the safety and reliability of the product during storage and use.

[0008] Furthermore, the base is provided with an extension at the liquid outlet, the extension having an airflow channel communicating with the liquid outlet, and the plug is provided at the airflow channel for sealing the airflow channel.

[0009] By adopting the above solution, an extension with an airflow channel is provided at the liquid outlet, serving as a mounting carrier for the plug. This allows steam to smoothly enter the combined cover during sterilization via the airflow channel, ensuring sufficient circulation of the sterilization medium and improving the uniformity and effectiveness of sterilization. Simultaneously, the plug, positioned at the airflow channel, effectively seals the liquid outlet after sterilization, preventing external contaminants from entering through the airflow channel, maintaining an internal sterile environment, and balancing the ventilation requirements during sterilization with the sealing requirements after sterilization, thus enhancing product safety.

[0010] Furthermore, the base is provided with a liquid outlet pipe, the liquid outlet is located at the end of the liquid outlet pipe away from the base, and the extension is provided at the liquid outlet.

[0011] By adopting the above solution, the liquid outlet pipe can be conveniently used to collect the liquid inside the combined cover, and the liquid outlet pipe can be easily connected to the external infusion pipe to transport the collected liquid to the infusion pipe. Correspondingly, when the liquid outlet pipe is provided, the extension part is located at the end of the liquid outlet pipe away from the base, which can facilitate the sealing of the liquid outlet pipe by the extension part and facilitate the removal of the extension part.

[0012] Furthermore, the plug is a sealing plug, which is disposed in the airflow channel, and there is a steam gap between the sealing plug and the airflow channel.

[0013] By adopting the above scheme, the plug is designed as a sealing plug and placed within the airflow channel. A steam gap is maintained between the sealing plug and the airflow channel, allowing sterilizing steam to enter the assembled cap through this gap during sterilization, ensuring effective sterilization of the assembly cavity. After sterilization, the sealing plug and airflow channel are further processed, such as compacting the sealing plug or welding it to the outlet pipe, thus achieving a complete seal of the airflow channel and preventing external contaminants from directly entering, thereby maintaining an internal sterile environment. This structure ensures the flow of sterilizing media even when the sealing plug is not completely sealed, and provides a complete seal of the airflow channel after sterilization, balancing the requirements of both the sterilization process and subsequent sterility maintenance, thereby improving product safety and reliability.

[0014] Furthermore, a connecting rib is provided on one side of the sealing plug, with one end of the connecting rib connected to the sealing plug and the other end connected to the extension portion.

[0015] By adopting the above solution, the sealing plug and extension are connected by connecting ribs, forming an integrated pre-assembled structure. This facilitates production and assembly, preventing the plug from being lost or misaligned during sterilization or transportation. Simultaneously, the connecting ribs act as limiters and fixers, maintaining the sealing plug's stable position within the airflow channel during sterilization, ensuring uniformity of the steam gap and smooth flow of sterilizing steam. During use, it also facilitates the operator in removing the sealing plug to open the outlet. This design improves the product's structural stability, assembly efficiency, and ease of use.

[0016] Furthermore, the outer wall of the liquid outlet pipe is provided with a threaded structure.

[0017] By adopting the above solution, a threaded structure is provided on the outer wall of the outlet tube, which facilitates threaded connection with external pipelines (such as infusion lines or connectors), achieving fast, reliable, and well-sealed assembly. Furthermore, the axial movement brought about by the threaded connection allows the external infusion line or connector to push the puncture component to puncture the sealing plug.

[0018] Furthermore, the connection between the extension and the base is provided with a thinning section, the wall thickness of which is less than the wall thickness of the extension.

[0019] By adopting the above solution, a thinner section is provided at the connection between the extension and the base, reducing the structural strength of the connection between the extension and the base, making it more prone to breakage or fracture under stress when needed. During use, when the outlet needs to be opened, the user can apply minimal force to disconnect the extension along the thinner section, allowing for quick removal of the plug or opening of the passage; the operation is simple and effortless. In cases where the plug is welded or bonded, making disassembly difficult, the outlet of the base can be directly connected to the outside by breaking off the extension.

[0020] Furthermore, a protrusion is provided on one side of the extension.

[0021] By adopting the above solution, a protrusion is provided on one side of the extension, which can serve as a force-bearing point, making it easier for users to apply force during use. Especially when it is necessary to break off the extension to remove the plug, pinching or pressing the protrusion allows for a more effortless and precise operation, improving the convenience and reliability of opening. At the same time, the protrusion also serves a positioning or anti-slip function, preventing tools or fingers from slipping during operation and improving safety.

[0022] Furthermore, a connecting rib is provided on one side of the sealing plug, with one end of the connecting rib connected to the sealing plug and the other end connected to the protrusion.

[0023] By adopting the above solution, the sealing plug and extension are connected by connecting ribs, forming an integrated pre-assembled structure. This facilitates production and assembly, preventing the plug from being lost or misaligned during sterilization or transportation. Simultaneously, the connecting ribs act as limiters and fixers, maintaining the stable position of the sealing plug within the airflow channel during sterilization, ensuring uniformity of the steam gap and smooth flow of sterilizing steam. During use, it also facilitates the removal of the sealing plug by the operator, allowing for the opening of the liquid outlet. This design improves the product's structural stability, assembly efficiency, and ease of use. Furthermore, the protrusions provide a mounting carrier for the connecting ribs, and if the extension is broken, the connecting ribs are removed along with the extension.

[0024] Furthermore, the outer wall of the base is provided with an anti-slip structure.

[0025] By adopting the above solution, an anti-slip structure is set on the outer wall of the base to increase the friction between the fingers and the base, making it easier for medical staff to hold the infusion set firmly during operation and preventing slippage due to sweaty hands, wet liquids, or wearing gloves, thus improving the safety of connecting the infusion set to the base.

[0026] Compared with the prior art, the beneficial effects of this utility model are as follows: By sealing the liquid outlet of the base with a plug, and in conjunction with the sealing plug at the assembly port, a double seal is achieved for the assembly cavity. This effectively prevents external microorganisms and contaminants from entering the combined cap through the liquid outlet or assembly port after sterilization, thus maintaining its internal sterility. The puncture component slides within the assembly cavity and can be opened during use by removing the plug and puncturing the sealing plug with the puncture tip, ensuring that the puncture operation is completed in a sterile environment. The overall structure solves the technical problem of traditional open-top combined caps being easily contaminated after sterilization, improving the safety and reliability of the product during storage and use. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a first-view perspective three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the exploded structure of this utility model; Figure 3 This is a second-view perspective three-dimensional structural diagram of the present invention; Figure 4 This is a cross-sectional structural diagram of the present invention; Figure 5 for Figure 4 Enlarged view of part A.

[0029] Key reference numerals in the attached drawings: 1. Base; 11. Assembly cavity; 12. Assembly port; 13. Liquid outlet; 14. Liquid outlet pipe; 141. Threaded structure; 15. Anti-slip structure; 2. Cover; 3. Puncture assembly; 31. Spike; 32. Tear rib; 4. Plug; 5. Extension; 51. Airflow channel; 52. Connecting rib; 53. Protrusion; 6. Thinning section. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0032] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0033] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.

[0034] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0035] The technical solution of this utility model will be further described below with reference to the embodiments and accompanying drawings.

[0036] Please see Figures 1 to 5 This application provides a sterilization combination cap, including a base 1, a cap 2, a puncture assembly 3, and a plug 4. The base 1 is provided with an assembly cavity 11, an assembly port 12, and a liquid outlet 13. The assembly port 12 and the liquid outlet 13 are both connected to the assembly cavity 11. The cap 2 is located at the assembly port 12 and is sealed to the base 1. The puncture assembly 3 is slidably disposed in the assembly cavity 11 between the base 1 and the cap 2. The puncture assembly 3 is provided with a spike 31 on the side facing the cap 2 for puncturing the cap 2. The plug 4 is located at the liquid outlet 13 of the base 1 for sealing the liquid outlet 13.

[0037] Specifically, the base 1 is an integral structural component with an internal assembly cavity 11. The base 1 has an assembly port 12 and a liquid outlet 13 communicating with the assembly cavity 11. The assembly port 12 is located at one end of the base 1 and is used to install the cover 2; the liquid outlet 13 is located at the other end or side of the base 1 and is used to connect to an external infusion passage. The cover 2 is positioned at the assembly port 12 of the base 1 and is sealed to the base 1 through heat fusion, ultrasonic welding, or interference fit to close one end of the assembly cavity 11 and prevent external contaminants from entering. The puncture assembly 3 is slidably disposed within the assembly cavity 11 between the base 1 and the cover 2. The puncture assembly 3 has a spike 31 on the side facing the cover 2. During use, the spike 31 can pierce the cover 2 by axial sliding, thereby opening the liquid flow channel for the infusion tubing to pass through. A plug 4 is located at the liquid outlet 13 of the base 1 to seal the liquid outlet 13. During sterilization, the plug 4 remains installed to ensure the combined cover is in a closed environment after sterilization, preventing secondary contamination. Before actual use, the plug 4 can be removed or opened to connect the outlet 13 to the external pipeline.

[0038] In practical applications, this sterilization assembly cap can be steam sterilized along with the infusion container. Sterilization steam circulates through the internal space of the assembly cavity 11, achieving thorough sterilization of the puncture component 3 and the interior of the cavity. After sterilization, the cap 2 and the plug 4 together maintain the sealed state of the assembly cavity 11, effectively isolating microorganisms and particulate matter from the outside air.

[0039] When needed, medical staff push the puncture component 3 along the assembly cavity 11 to slide its spike 31 through the cover 2 to complete the puncture action; at the same time, remove the plug 4 at the outlet 13 and connect the outlet 13 to the infusion line to start the infusion.

[0040] The plug 4 can be a plastic sealing film, a sealing plug, a soft plug, or other structures that can block the liquid outlet 13, and is not limited here.

[0041] Alternatively, the cap 2 can be used as the cap 2 for an infusion bag or infusion bottle, and the combined cap can be shipped as a single unit with the infusion bag or infusion bottle, thereby ensuring that the surface of the cap 2 facing away from the assembly cavity 11 is not at risk of being contaminated.

[0042] See Figure 3-5 As shown, in some embodiments, the base 1 is provided with an extension 5 at the liquid outlet 13. The extension 5 has an airflow channel 51, which is connected to the liquid outlet 13. A plug 4 is provided at the airflow channel 51 for sealing the airflow channel 51.

[0043] Specifically, by providing an extension 5 with an airflow channel 51 at the liquid outlet 13, a mounting carrier for the plug 4 is provided, allowing steam to smoothly enter the combined cover during sterilization via the airflow channel 51. This ensures sufficient flow of the sterilization medium, improving the uniformity and effectiveness of sterilization. Simultaneously, the plug 4, located at the airflow channel 51, effectively seals the liquid outlet 13 after sterilization, preventing external contaminants from entering through the airflow channel 51, maintaining an internal sterile environment, and balancing the ventilation requirements during sterilization with the sealing requirements after sterilization, thus enhancing product safety.

[0044] See Figure 3-5 As shown, in some embodiments, the base 1 is provided with a liquid outlet pipe 14, the liquid outlet 13 is located at the end of the liquid outlet pipe 14 away from the base 1, and the extension 5 is provided at the liquid outlet 13.

[0045] Specifically, the liquid outlet pipe 14 facilitates the collection of liquid within the combined cover and allows for easy connection to an external infusion pipe, thereby delivering the collected liquid to the infusion pipe. Correspondingly, with the liquid outlet pipe 14 installed, the extension 5 is located at the end of the liquid outlet pipe 14 away from the base 1, which facilitates the sealing of the liquid outlet pipe 14 by the extension 5 and the removal of the extension 5.

[0046] See Figure 3-5 As shown, in some embodiments, the plug 4 is a sealing plug, which is disposed in the airflow channel 51, and there is a steam gap between the sealing plug and the airflow channel 51.

[0047] Specifically, the plug 4 is designed as a sealing plug and placed within the airflow channel 51. A steam gap is maintained between the sealing plug and the airflow channel 51, allowing sterilizing steam to enter the assembled cap during sterilization, ensuring effective sterilization of the assembly cavity 11. After sterilization, the sealing plug and airflow channel 51 are further processed, such as compacting the sealing plug or welding it to the outlet pipe 14, to achieve a complete seal of the airflow channel 51. External contaminants cannot directly enter, thus maintaining an internal sterile environment. This structure ensures the flow of sterilizing media even when the sealing plug is not completely sealed, and provides a complete seal of the airflow channel 51 after sterilization, balancing the requirements of both the sterilization process and subsequent sterility maintenance, thus improving product safety and reliability.

[0048] See Figure 3-5 As shown, in some embodiments, a connecting rib 52 is provided on one side of the sealing plug, with one end of the connecting rib 52 connected to the sealing plug and the other end connected to the extension portion 5.

[0049] Specifically, by setting connecting ribs 52 to connect the sealing plug and the extension part 5, the sealing plug and the extension part 5 form an integrated pre-assembled structure, which facilitates production and assembly operations and prevents the plug 4 from being lost or misaligned during sterilization or transportation. At the same time, the connecting ribs 52 play a limiting and fixing role, keeping the sealing plug in a stable position within the airflow channel 51 during sterilization, ensuring the uniformity of the steam gap and guaranteeing the smooth flow of sterilizing steam; during use, it also makes it easy for operators to apply force to remove the sealing plug and open the liquid outlet 13. This design improves the structural stability, assembly efficiency, and ease of use of the product.

[0050] See Figure 3-5 As shown, in some embodiments, the outer wall of the outlet pipe 14 is provided with a threaded structure 141.

[0051] Specifically, a threaded structure 141 is provided on the outer wall of the outlet tube 14 to facilitate threaded connection with external pipelines (such as infusion lines or connectors), achieving fast, reliable, and well-sealed assembly. Furthermore, the axial movement brought about by the threaded connection allows the external infusion line or connector to push the puncture assembly 3 to puncture the sealing plug.

[0052] See Figure 3-5 As shown, in some embodiments, the connection between the extension 5 and the base 1 is provided with a thinning section 6, and the wall thickness of the thinning section 6 is less than the wall thickness of the extension 5.

[0053] Specifically, by providing a thinner section 6 at the connection between the extension 5 and the base 1, the strength of the connection structure between the extension 5 and the base 1 is reduced, making it easier to break or snap under stress when needed. During use, when it is necessary to open the outlet 13, the user can apply a small force to disconnect the extension 5 along the thinner section 6, thereby quickly removing the plug 4 or opening the passage, which is simple and labor-saving. In cases where the plug 4 is welded or bonded and is not easy to disassemble, the outlet 13 of the base 1 can be directly connected to the outside by breaking the extension 5.

[0054] Based on the structure of the base 1 with the liquid outlet pipe 14, the thinning section 6 is located between the liquid outlet pipe 14 and the extension 5, so as to facilitate the breakage and removal of the extension 5.

[0055] See Figure 3-5 As shown, in some embodiments, a protrusion 53 is provided on one side of the extension 5.

[0056] Specifically, a protrusion 53 is provided on one side of the extension 5, which can serve as a force-bearing point, making it easier for the user to apply force during use. Especially when it is necessary to break the extension 5 to remove the plug 4, pinching or pressing the protrusion 53 can make the operation easier and more precise, improving the convenience and reliability of opening. At the same time, the protrusion 53 can also serve a positioning or anti-slip function, preventing tools or fingers from slipping during operation and improving the safety of use.

[0057] See Figure 3-5 As shown, in some embodiments, a connecting rib 52 is provided on one side of the sealing plug, with one end of the connecting rib 52 connected to the sealing plug and the other end connected to the protrusion 53.

[0058] Specifically, the sealing plug and extension 5 are connected by a connecting rib 52, forming an integrated pre-assembled structure that facilitates production and assembly, preventing the plug 4 from being lost or misaligned during sterilization or transportation. Simultaneously, the connecting rib 52 serves to limit and fix the sealing plug, maintaining its stable position within the airflow channel 51 during sterilization, ensuring uniformity of the steam gap and smooth flow of sterilizing steam. During use, it also facilitates the removal of the sealing plug by the operator, allowing the outlet 13 to be opened. This design improves the product's structural stability, assembly efficiency, and ease of use. Furthermore, the protrusion 53 provides a mounting carrier for the connecting rib 52, and when the extension 5 is broken, the connecting rib 52 is removed along with the extension 5.

[0059] See Figure 1-3 As shown, in some embodiments, the outer wall of the base 1 is provided with an anti-slip structure 15.

[0060] In a specific implementation, an anti-slip structure 15 is provided on the outer wall of the base 1 to increase the friction between the fingers and the base 1, making it easier for medical staff to hold the device firmly during operation and preventing slippage due to sweaty hands, wet liquids, or wearing gloves, thereby improving the safety of connecting the infusion set to the base 1.

[0061] The anti-slip structure 15 can be any structure that facilitates the stability of the base 1 by controlling it with fingers, such as protrusions 53, frosted surfaces, or grooves. No specific limitations are imposed here.

[0062] In some embodiments, the spike 31 is provided with a tearing rib 32 so that during the piercing process of the spike 31, the pierced part of the cover 2 is torn, thereby preventing the part of the cover 2 from resetting and blocking the liquid outlet channel, thus affecting the liquid outlet.

[0063] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. A sterilization combination cap, characterized in that, include: The base (1) is provided with an assembly cavity (11), an assembly port (12) and a liquid outlet (13), and the assembly port (12) and the liquid outlet (13) are both connected to the assembly cavity (11); Cover (2), the cover (2) is provided at the assembly port (12) and is sealed to the base (1); The puncture assembly (3) is slidably disposed in the assembly cavity (11) between the base (1) and the cover (2). The puncture assembly (3) has a spike (31) on the side facing the cover (2) for puncturing the cover (2). A plug (4) is provided at the liquid outlet (13) of the base (1) for sealing the liquid outlet (13).

2. The sterilization combination cap according to claim 1, characterized in that, The base (1) has an extension (5) at the liquid outlet (13), the extension (5) has an airflow channel (51) that communicates with the liquid outlet (13), and the plug (4) is provided at the airflow channel (51) for sealing the airflow channel (51).

3. The sterilization combination cap according to claim 2, characterized in that, The base (1) is provided with a liquid outlet pipe (14), the liquid outlet (13) is located at the end of the liquid outlet pipe (14) away from the base (1), and the extension (5) is provided at the liquid outlet (13).

4. The sterilization combination cap according to claim 3, characterized in that, The plug (4) is a sealing plug, which is located in the airflow channel (51) and has a steam gap between the sealing plug and the airflow channel (51).

5. A sterilization combination cap according to claim 4, characterized in that, One side of the sealing plug is provided with a connecting rib (52), one end of the connecting rib (52) is connected to the sealing plug, and the other end is connected to the extension (5).

6. A sterilization combination cap according to claim 3, characterized in that, The outer wall of the outlet pipe (14) is provided with a threaded structure (141).

7. A sterilization combination cap according to claim 4 or 5, characterized in that, The connection between the extension (5) and the base (1) is provided with a thinning section (6), the wall thickness of the thinning section (6) being less than the wall thickness of the extension (5).

8. A sterilization combination cap according to claim 7, characterized in that, A protrusion (53) is provided on one side of the extension (5).

9. A sterilization combination cap according to claim 8, characterized in that, One side of the sealing plug is provided with a connecting rib (52), one end of the connecting rib (52) is connected to the sealing plug, and the other end is connected to the protrusion (53).

10. A sterilization combination cap according to any one of claims 1-6, characterized in that, The base (1) has an anti-slip structure (15) on its outer wall.

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