Combined cap with internal piercing function

Abstract

A kind of combination cover with internal puncture function, including base, cover and puncture plate, base is equipped with assembly cavity, assembly port and liquid outlet, assembly port and liquid outlet are all communicated with assembly cavity, cover is equipped in assembly port, and is sealedly connected with base, puncture plate is equipped in the side of cover away from assembly port, puncture plate side towards cover is equipped with sharp part, the side of sharp part is equipped with liquid inlet channel, liquid inlet channel penetrates puncture plate, the side of sharp part setting liquid inlet channel is equipped with tear muscle, to prevent the cover that sharp part pierces resets covers liquid inlet channel, by setting tear muscle in sharp part, it can be pierced while destroying its local structure, effectively prevent the cover material that is pierced by elasticity resets and retracts to cover liquid inlet channel, to avoid infusion channel blockage, ensure that liquid continues to flow steadily, that is, realize the technical effect of piercing and tearing simultaneously.

Description

Technical Field

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

[0002] In the field of medical infusion, infusion bags are commonly used containers for drug storage and delivery, and their matching infusion combination caps are key components to ensure the safe and smooth infusion process. Traditional infusion combination caps have a series of operational inconveniences and potential risks in application, which seriously affect infusion efficiency and quality.

[0003] Traditional IV bag caps are typically attached to the IV bag. During infusion, healthcare professionals must first puncture the cap with a separate needle before inserting the IV tubing into the punctured cap to establish an infusion channel. This multi-step process not only increases procedure time and reduces overall infusion efficiency, but each additional step also introduces a greater risk of contamination, posing a potential threat to patient medication safety.

[0004] To address the aforementioned issues and improve the efficiency of intravenous infusion procedures, an improved infusion combination cap has emerged on the market. This structure, by rotating with the infusion combination cap, utilizes the axial displacement generated by rotation to puncture the cap, thus eliminating the need for a separate puncture needle to penetrate the cap. This simplifies the procedure and improves efficiency to some extent.

[0005] However, this improved structure has revealed new technical problems in practical applications. Because the material of the infusion cap, when punctured, typically possesses a certain degree of elastic deformation, the punctured portion deforms under its own elasticity after being punctured by the rotating structure, thus pressing against the fluid flow channel. This can lead to blockage of the infusion channel, severely affecting the normal flow of fluid, causing unstable infusion rates, and potentially even completely interrupting the infusion process. This not only interferes with normal medical treatment and delays patient care but may also cause medication to accumulate inside the infusion bag due to poor infusion flow, increasing drug waste and medical costs. Utility Model Content

[0006] The purpose of this invention is to disclose a combination cap with an internal puncture function, which can solve the problem of blockage of the infusion channel caused by the cap resetting after puncture.

[0007] To achieve the above objectives, this utility model discloses a combined cap with an internal puncture function, 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 plate is provided on the side of the cover away from the assembly port. The puncture plate has a spike on the side facing the cover. A liquid inlet channel is provided on one side of the spike. The liquid inlet channel passes through the puncture plate. A tear rib is provided on the side of the spike where the liquid inlet channel is located to prevent the cover from being punctured by the spike and then repositioned to cover the liquid inlet channel.

[0008] By employing the above-mentioned solution, and by incorporating a tearing rib at the tip, the local structure of the cap can be damaged while piercing it. This effectively prevents the punctured cap material from retracting and blocking the infusion channel due to elastic reset, thus avoiding blockage of the infusion channel and ensuring a continuous and stable flow of liquid. This achieves the technical effect of simultaneous puncture and tearing. Furthermore, since the tearing rib is located on the same side as the infusion channel, even if the damaged portion of the cap reverts to its original position with a very small probability, it will be resisted by the tearing rib, preventing the damaged portion of the cap from blocking the infusion channel.

[0009] Furthermore, the spike is arc-shaped, and a spacer is provided in the middle of the spike so that two liquid inlet channels are formed on both sides of the spike. The tearing rib is provided at the end of the spacer facing the puncture direction of the spike.

[0010] By adopting the above-mentioned design, the thorn is arc-shaped, and independent inlet channels are formed on both sides through the central partition. This effectively increases the flow area, improves the fluid outflow velocity, avoids throttling caused by a single channel, and ensures smooth infusion. The arc-shaped thorn experiences more even force during puncture, reducing deflection or jamming and improving the success rate and reliability of the procedure. The tear rib is located at the end of the partition facing the puncture direction, between the two inlet channels. It can concentrate the disruption of the integrity of the central area of ​​the cap during puncture, effectively preventing material rebound in this critical area and preventing it from simultaneously blocking both inlet channels, further ensuring the open state of both channels. In addition, a single thorn structure simultaneously achieves puncture, diversion, and anti-reset functions without the need for additional components, simplifying the overall design and improving the integration and reliability of the components.

[0011] Furthermore, it also includes an adapter plate located between the liquid outlet and the puncture plate. The adapter plate includes a support portion and a structural column. The support portion abuts against the puncture plate, and the structural column is located on the side of the support portion away from the puncture plate. The support portion and the structural column are provided with a flow guiding channel penetrating both of them. One end of the flow guiding channel is connected to the liquid inlet channel, and the other end is connected to the liquid outlet.

[0012] By adopting the above scheme, the supporting part of the adapter plate abuts against the puncture plate, providing stable support for the puncture plate and preventing deformation or displacement caused by uneven force during puncture. This ensures that the puncture tip accurately and smoothly pierces the cap, improving the stability and reliability of the operation. The structural column is located near the outlet, facilitating the connection between the internal abutment column and the structural column when the external infusion tube is connected to the base. This, in turn, pushes the entire adapter plate and puncture plate to move, ultimately completing the puncture and tearing of the cap. The adapter plate has a flow guide channel running through the supporting part and the structural column, connecting the inlet channel of the puncture plate to the outlet of the base, forming a complete liquid flow path from the puncture point to the external infusion system. The adapter plate integrates support and flow guide functions, making reasonable use of the internal space of the base, making the connection between the puncture plate and the outlet more compact, which is beneficial for the positioning and assembly of various components, improving the overall integration and assembly accuracy of the combined cap. The flow channel forms a closed flow path when the support part is in contact with the puncture plate, reducing the risk of liquid exposure during transmission, preventing leakage and contamination, and further ensuring the safety and cleanliness of the infusion process.

[0013] Furthermore, the puncture plate is provided with multiple liquid inlet holes, and the adapter plate is provided with a manifold on the side facing the puncture plate. All the liquid inlet holes and the liquid inlet channels are connected to the manifold.

[0014] By adopting the above scheme, the puncture plate is equipped with multiple liquid inlet holes, which increases the opening area for liquid to enter from the bottom of the cover, effectively improving the collection and inflow efficiency of liquid. The manifold on the adapter plate concentrates and collects the liquid from all liquid inlet holes and liquid inlet channels, so that liquid from different locations can be uniformly guided to the guiding channel, avoiding uneven local flow velocity or air resistance, and ensuring smooth and continuous liquid flow.

[0015] Furthermore, one end of the liquid inlet channel is connected to the manifold, and the bottom wall of the manifold is provided with an inclined structure that slopes down toward the liquid inlet channel.

[0016] By adopting the above solution, the bottom wall of the manifold is designed with a downward-sloping structure facing the inlet channel. Gravity guides the liquid to flow naturally into the inlet channel, preventing liquid accumulation or stagnation within the manifold and improving drainage efficiency. The sloping structure helps the liquid flow completely into the guide channel, reducing residue, especially at the end of the infusion or when the bag is tilted, effectively draining excess liquid, reducing drug waste, and improving the integrity of drug utilization. The sloping bottom wall reduces the risk of air bubbles accumulating at the bottom of the manifold, making the liquid flow more continuous and stable, and preventing infusion disruptions or interruptions caused by gas-liquid mixing or air lock.

[0017] Furthermore, the adapter plate is provided with a support component in the manifold, and the puncture plate is attached to the support component.

[0018] By adopting the above scheme, the support component is placed in the manifold and fits against the puncture plate, providing uniform and reliable support for the puncture plate, effectively preventing deformation or breakage caused by stress concentration during puncture, and improving the reliability of puncture action and structural durability.

[0019] Furthermore, the support assembly includes a plurality of support columns, and the puncture plate abuts against all of the support columns.

[0020] By adopting the above scheme, the multiple support columns are distributed to make the stress on the puncture plate more uniform, effectively avoiding warping, tilting or breakage caused by insufficient support at a single point or in a local area, and significantly improving the structural stability and load-bearing capacity of the puncture plate during the puncture process. Furthermore, the multiple support columns provide support in a point-like or small-area contact manner, occupying little space. While meeting structural strength requirements, they also leave sufficient channels for the flow of liquid in the manifold, reducing obstruction to fluid flow and balancing the needs of structural support and unobstructed flow.

[0021] Furthermore, the base is provided with a liquid outlet pipe, the liquid outlet is located at one end of the liquid outlet pipe, and the outer wall of the liquid outlet pipe is provided with a threaded structure.

[0022] By adopting the above solution, the outer wall of the infusion tube is provided with a threaded structure, which can be quickly and firmly connected with the infusion set and infusion needle by tightening the thread. Furthermore, the axial movement brought about by the threaded connection allows the external infusion set to push the puncture plate to puncture the cap.

[0023] Furthermore, the outer wall of the base is provided with an anti-slip structure.

[0024] 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.

[0025] Furthermore, the base is provided with a first snap-fit ​​structure, and the cover is provided with a second snap-fit ​​structure, the first snap-fit ​​structure and the second snap-fit ​​structure engaging in a snap-fit ​​cooperation.

[0026] By adopting the above scheme, the base and the cover can be quickly and easily connected through the cooperation of the first snap-fit ​​structure and the second snap-fit ​​structure, so as to facilitate crimping and sealing during the production process.

[0027] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. By setting tearing ribs at the tip, the local structure of the cap can be destroyed while piercing the cap, effectively preventing the pierced cap material from retracting and blocking the infusion channel due to elastic reset, thereby avoiding blockage of the infusion channel and ensuring continuous and stable flow of liquid, thus achieving the technical effect of piercing and tearing at the same time. 2. The tear rib is located on the same side as the liquid inlet channel. Even if the damaged part of the cover is restored with a very small probability, it will be resisted by the tear rib, so that the damaged part of the cover cannot block the liquid inlet channel. Attached Figure Description

[0028] 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.

[0029] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the first explosive structure of this utility model; Figure 3 This is a schematic diagram of the second explosive structure of this utility model; Figure 4 This is a schematic diagram of the puncture plate of this utility model; Figure 5 This is a schematic diagram of the structure of the adapter plate of this utility model; Figure 6 This is a schematic diagram of the puncture plate of this utility model in its initial state. Figure 7 This is a schematic diagram of the puncture plate of this utility model after puncture.

[0030] Explanation of main reference numerals: 1. Base; 11. Assembly cavity; 12. Assembly port; 13. Liquid outlet; 14. Liquid outlet pipe; 141. Threaded structure; 15. Anti-slip structure; 16. First snap-fit ​​structure; 2. Cover; 21. Second snap-fit ​​structure; 3. Puncture plate; 31. Spike; 32. Liquid inlet channel; 33. Tear rib; 34. Spacing part; 35. Liquid inlet hole; 4. Adapter plate; 41. Support part; 411. Manifold; 412. Support column; 42. Structural column; 43. Guide channel. Detailed Implementation

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] The technical solution of this utility model will be further described below with reference to the embodiments and accompanying drawings.

[0037] Please see Figures 1 to 7 This application provides a combined cap with an internal puncture function, including a base 1, a cap body 2, and a puncture plate 3. 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 body 2 is located at the assembly port 12 and is sealed to the base 1. The puncture plate 3 is located on the side of the cap body 2 away from the assembly port 12. The puncture plate 3 is provided with a spike 31 on the side facing the cap body 2. A liquid inlet channel 32 is provided on one side of the spike 31. The liquid inlet channel 32 penetrates the puncture plate 3. A tear rib 33 is provided on the side of the spike 31 where the liquid inlet channel 32 is located, so as to prevent the cap body 2 from being punctured by the spike 31 and then repositioned to cover the liquid inlet channel 32.

[0038] Specifically, the base 1 serves as the main support structure for the overall design, and its interior contains an assembly cavity 11 for assembling other components of the combined cap. The base 1 has an assembly port 12 and a liquid outlet 13 communicating with the assembly cavity 11. The assembly port 12 is used to install the cap 2, while the liquid outlet 13 serves as a channel for liquid outflow, facilitating a secure and sealed connection with the infusion set or needle via threaded tightening. The cap 2 is installed on the assembly port 12 of the base 1, forming a sealed connection with the base 1 to ensure the sealing of the assembly cavity 11 and maintain a sterile environment between the cap 2 and the base 1. The puncture plate 3 is located on the side of the cap 2 away from the assembly port 12. The side of the puncture plate 3 facing the cap 2 has a spike 31. During use, the spike 31 is used to pierce the cap 2 to establish a liquid flow channel. One side of the spike 31 has an inlet channel 32 penetrating the puncture plate 3, serving as the main path for liquid outflow. A tear rib 33 is also provided on the side of the spike 31 where the inlet channel 32 is located. The function of the tearing rib 33 is to simultaneously destroy the material structure of the punctured area of ​​the cover 2 during the process of the spike 31 piercing the cover 2, so as to prevent the part from resetting or retracting due to the elasticity of the material, thereby avoiding it from blocking the liquid inlet channel 32 and ensuring the continuous opening of the channel after puncture.

[0039] By providing a tearing rib 33 at the tip 31, the local structure of the cap 2 can be damaged while piercing it, effectively preventing the punctured cap 2 material from retracting and blocking the infusion channel 32 due to elastic reset. This avoids blockage of the infusion channel and ensures a continuous and stable flow of liquid, achieving the technical effect of simultaneous puncture and tearing. Furthermore, the tearing rib 33 is located on the same side as the infusion channel 32. Even if the damaged part of the cap 2 experiences a very small probability of reset, it will be resisted by the tearing rib 33, thus preventing the damaged part of the cap 2 from blocking the infusion channel 32.

[0040] Optionally, 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 an integral part of the infusion bag or infusion bottle.

[0041] See Figure 1-4 As shown, in some embodiments, the spike portion 31 is arc-shaped, and a spacer portion 34 is provided in the middle of the spike portion 31 so that two liquid inlet channels 32 are formed on both sides of the spike portion 31, and the tearing rib 33 is provided at the end of the spacer portion 34 facing the piercing direction of the spike portion 31.

[0042] Specifically, the spike portion 31 is arc-shaped, with a cross-sectional shape resembling an arch or crescent. This arc-shaped structure not only helps to disperse stress during puncture, making the puncture action smoother and reducing resistance and deflection, but also improves the overall structural strength of the spike portion 31, preventing breakage or deformation during puncture. A spacer portion 34 is provided in the middle of the spike portion 31, extending along the length of the spike portion 31 and a certain distance from the root towards the tip. The spacer portion 34 divides the tail end of the spike portion 31 into two independent parts, thus forming two independent inlet channels 32 on both sides of the spike portion 31. These two inlet channels 32 penetrate the puncture plate 3, serving as a dual-flow path for liquid to flow in from below the cover 2, significantly increasing the liquid flow area, improving the infusion rate, and avoiding the throttling or insufficient flow problems that may occur with a single channel. Furthermore, the tear rib 33 is located at the end of the spacer 34 facing the piercing direction of the spike 31, specifically at the front center between the two liquid inlet channels 32. When the piercing plate 3 moves downward to pierce, the tear rib 33 will act on the central area of ​​the cover 2 first or simultaneously, tearing or destroying the material at the center of the piercing point as the spike 31 pierces the cover 2, causing it to lose its elastic restoring ability. Since the tear rib 33 is located between the two channels, it can effectively prevent the material in the central area of ​​the cover 2 from rebounding after being pierced, thereby preventing it from simultaneously blocking both liquid inlet channels 32 and ensuring that both channels remain open after piercing.

[0043] The integrated spike design 31 achieves puncture, diversion, and anti-reset effects simultaneously, eliminating the need for additional components. The structure is compact, highly reliable, and significantly improves the performance and safety of the combination cap.

[0044] See Figure 2-5 As shown, in some embodiments, the combined cover also includes an adapter plate 4, which is located between the liquid outlet 13 and the puncture plate 3. The adapter plate 4 includes a support portion 41 and a structural column 42. The support portion 41 abuts against the puncture plate 3, and the structural column 42 is located on the side of the support portion 41 away from the puncture plate 3. The support portion 41 and the structural column 42 are provided with a flow channel 43 that runs through them. One end of the flow channel 43 is connected to the liquid inlet channel 32, and the other end is connected to the liquid outlet 13.

[0045] Specifically, the adapter plate 4 is positioned between the liquid outlet 13 of the base 1 and the puncture plate 3. The adapter plate 4 is composed of a support portion 41 and a structural column 42. The support portion 41 is plate-shaped, and its upper surface abuts against the puncture plate 3, providing stable support for the puncture plate 3. This support effectively prevents the puncture plate 3 from deforming, shifting, or tilting due to external forces during puncture, ensuring that the spike 31 can accurately and vertically puncture the cover 2, improving the reliability and consistency of the puncture action. The structural column 42 is positioned on the side of the support portion 41 away from the puncture plate 3, and it can be a hollow column. A flow channel 43 is provided inside the support portion 41 and the structural column 42, penetrating both. One end of the flow channel 43 is connected to the liquid inlet channel 32 on the puncture plate 3, and the other end is connected to the liquid outlet 13 of the base 1, thus forming a complete liquid flow path from the puncture point → liquid inlet channel 32 → flow channel 43 → liquid outlet 13.

[0046] See Figure 6 and Figure 7 As shown, when the external infusion set is connected and tightened to the base 1, the push rod inside the infusion set first contacts and pushes the structural column 42. The structural column 42 transmits the thrust to the support part 41, which then transmits the force to the puncture plate 3, thereby causing the spike part 31 to move upward and complete the puncture action on the cover 2. After the puncture is completed, the liquid enters the inlet channel 32 of the puncture plate 3 from the punctured opening of the cover 2, flows into the guide channel 43 of the adapter plate 4, and finally flows to the external infusion system through the outlet 13.

[0047] The adapter plate 4 structure not only provides stable support and force transmission for the puncture plate 3, but also undertakes the function of guiding the flow, making the connection between the components more compact and reliable, improving the overall integration and sealing performance of the combined cover, while ensuring the continuity and safety of liquid flow.

[0048] See Figure 2-5 As shown, in some embodiments, the puncture plate 3 is provided with multiple liquid inlet holes 35, and the adapter plate 4 is provided with a manifold 411 on the side facing the puncture plate 3. All the liquid inlet holes 35 and the liquid inlet channels 32 are connected to the manifold 411.

[0049] Specifically, the puncture plate 3 has multiple inlet holes 35 on the side opposite to the cover 2. These inlet holes 35 can be distributed around the spikes 31 or on the bottom surface of the puncture plate 3, and can be circular, elliptical, or strip-shaped, and can be arranged uniformly or non-uniformly. When the spikes 31 pierce the cover 2, the liquid in the infusion bag can not only flow out through the inlet channel 32 of the spikes 31, but also the liquid flowing out from the inlet channel 32 can simultaneously pass through the multiple inlet holes 35 into the puncture plate 3. The adapter plate 4 has a manifold 411 on the side surface facing the puncture plate 3. The manifold 411 is a recessed cavity structure located on the upper surface of the support 41, and its size and shape are adapted to the bottom of the puncture plate 3 to receive the liquid flowing out from each inlet hole 35 and inlet channel 32 of the puncture plate 3.

[0050] In the assembled state, the multiple liquid inlet holes 35 of the piercing plate 3 and the liquid inlet channel 32 of the spike 31 are all connected to the manifold 411 on the adapter plate 4. Liquid enters the manifold 411 from below the cover 2 through the liquid inlet holes 35 and the liquid inlet channel 32. After being collected in the manifold 411, it is then uniformly guided into the guide channel 43 and finally discharged through the outlet 13.

[0051] See Figure 5 As shown, in some embodiments, one end of the liquid inlet channel 32 is connected to the manifold 411, and the bottom wall of the manifold 411 is provided with an inclined structure that slopes down toward the liquid inlet channel 32.

[0052] Specifically, the bottom wall of the manifold 411 is designed with a downward-sloping structure facing the inlet channel 32. This utilizes gravity to guide the liquid naturally towards the inlet channel 32, preventing liquid accumulation or stagnation within the manifold 411 and improving drainage efficiency. The sloping structure helps the liquid flow completely into the guide channel 43, reducing residue. Especially at the end of the infusion or when the bag is tilted, it effectively drains residual liquid, reducing drug waste and improving the integrity of drug utilization. The sloping bottom wall reduces the risk of air bubbles accumulating at the bottom of the manifold 411, making the liquid flow more continuous and stable, and preventing infusion disruptions or interruptions caused by gas-liquid mixing or air lock.

[0053] In some embodiments, the adapter plate 4 is provided with a support component in the manifold 411, and the piercing plate 3 is attached to the support component.

[0054] Specifically, the support component is located in the manifold 411 and fits against the puncture plate 3, providing uniform and reliable support for the puncture plate 3, effectively preventing deformation or breakage caused by force concentration during puncture, and improving the reliability of the puncture action and the durability of the structure.

[0055] See Figure 5 As shown, in some embodiments, the support assembly includes a plurality of support columns 412, and the piercing plate 3 abuts against all of the support columns 412.

[0056] Specifically, the multiple support columns 412 are distributed to make the stress on the puncture plate 3 more uniform, effectively avoiding warping, tilting or breakage caused by insufficient support at a single point or in a local area, and significantly improving the structural stability and load-bearing capacity of the puncture plate 3 during the puncture process. Furthermore, the multiple support columns 412 provide support in a point-like or small-area contact manner, occupying little space. While meeting structural strength requirements, they also leave sufficient channels for the flow of liquid within the manifold 411, reducing obstruction to fluid flow and balancing the needs of structural support and unobstructed flow.

[0057] See Figure 1-3 As shown, in some embodiments, the base 1 is provided with a liquid outlet pipe 14, the liquid outlet 13 is located at one end of the liquid outlet pipe 14, and the outer wall of the liquid outlet pipe 14 is provided with a threaded structure 141.

[0058] Specifically, the outer wall of the infusion tube 14 is provided with a threaded structure 141, which can be quickly and firmly connected with the infusion set and infusion needle by tightening the thread. Furthermore, the axial movement brought about by the threaded connection allows the external infusion set to push the puncture plate 3 to puncture the cover 2.

[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] Specifically, the outer wall of the base 1 is provided with an anti-slip structure 15 to increase the friction between the fingers and the base 1, so that medical staff can hold it firmly during operation and prevent slippage due to sweaty hands, wet liquids or wearing gloves, thereby improving the safety of the infusion set when connected to the base 1.

[0061] See Figure 3 , Figure 6 and Figure 7 As shown, in some embodiments, the base 1 is provided with a first snap-fit ​​structure 16, and the cover 2 is provided with a second snap-fit ​​structure 21, and the first snap-fit ​​structure 16 and the second snap-fit ​​structure 21 are snap-fitted together.

[0062] Specifically, through the cooperation of the first snap-fit ​​structure 16 and the second snap-fit ​​structure 21, the base 1 and the cover 2 can be quickly and easily connected to facilitate pressing and sealing during the production process. In this embodiment, one of the first snap-fit ​​structure 16 and the second snap-fit ​​structure 21 is a slot, and the other is a block. The first snap-fit ​​structure 16 is a block, and the second snap-fit ​​structure 21 is a slot. The cooperation between the slot and the block completes the snap-fit ​​between the cover 2 and the base 1, facilitating pressing and sealing during the production process.

[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 combination cap with internal puncture function, 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); A puncture plate (3) is provided on the side of the cover (2) away from the assembly port (12). The puncture plate (3) has a spike (31) on the side facing the cover (2). A liquid inlet channel (32) is provided on one side of the spike (31). The liquid inlet channel (32) penetrates the puncture plate (3). A tear rib (33) is provided on the side of the spike (31) where the liquid inlet channel (32) is located, so as to prevent the cover (2) from being punctured by the spike (31) and to reposition and cover the liquid inlet channel (32).

2. The combined cap with internal puncture function according to claim 1, characterized in that, The spike (31) is arc-shaped, and a spacer (34) is provided in the middle of the spike (31) so that the two sides of the spike (31) form two liquid inlet channels (32). The tearing rib (33) is provided at one end of the spacer (34) facing the piercing direction of the spike (31).

3. The combined cap with internal puncture function according to claim 1, characterized in that, It also includes a transition plate (4), which is located between the liquid outlet (13) and the puncture plate (3). The transition plate (4) includes a support part (41) and a structural column (42). The support part (41) abuts against the puncture plate (3). The structural column (42) is located on the side of the support part (41) away from the puncture plate (3). The support part (41) and the structural column (42) are provided with a flow channel (43) that runs through them. One end of the flow channel (43) is connected to the liquid inlet channel (32), and the other end is connected to the liquid outlet (13).

4. A combined cap with internal puncture function according to claim 3, characterized in that, The puncture plate (3) is provided with multiple liquid inlet holes (35), and the adapter plate (4) is provided with a manifold (411) on the side facing the puncture plate (3). All the liquid inlet holes (35) and the liquid inlet channel (32) are connected to the manifold (411).

5. A combined cap with internal puncture function according to claim 4, characterized in that, One end of the liquid inlet channel (32) is connected to the manifold (411), and the bottom wall of the manifold (411) is provided with an inclined structure that slopes down toward the liquid inlet channel (32).

6. A combined cap with internal puncture function according to claim 4, characterized in that, The adapter plate (4) is provided with a support component in the manifold (411), and the piercing plate (3) is attached to the support component.

7. A combined cap with internal puncture function according to claim 6, characterized in that, The support assembly includes a plurality of support columns (412), and the piercing plate (3) abuts against all of the support columns (412).

8. A combined cap with internal puncture function according to any one of claims 1-7, characterized in that, The base (1) is provided with a liquid outlet pipe (14), the liquid outlet (13) is located at one end of the liquid outlet pipe (14), and the outer wall of the liquid outlet pipe (14) is provided with a threaded structure (141).

9. A combined cap with internal puncture function according to any one of claims 1-7, characterized in that, The base (1) has an anti-slip structure (15) on its outer wall.

10. A combined cap with internal puncture function according to any one of claims 1-7, characterized in that, The base (1) is provided with a first snap-fit ​​structure (16), and the cover (2) is provided with a second snap-fit ​​structure (21). The first snap-fit ​​structure (16) and the second snap-fit ​​structure (21) are snap-fitted together.

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