WO2024103430A1

WO2024103430A1 - Hot-pressed closed-hole easy-to-tear-film connector and infusion bag

Info

Publication number: WO2024103430A1
Application number: PCT/CN2022/133367
Authority: WO
Inventors: 刘师宏; 刘超
Original assignee: 湖南千山制药机械股份有限公司
Priority date: 2022-11-16
Filing date: 2022-11-22
Publication date: 2024-05-23
Also published as: CN115887218A

Abstract

A hot-pressed closed-hole easy-to-tear-film connector, comprising a connector base (100) and a first connector tube (200) in communication with the connector base (100). The first connector tube (200) comprises a first puncture end part (210) and an inner plug (220) arranged in the first puncture end part (210). The first puncture end part (210) comprises a first puncture cavity (211) for accommodating the inner plug (220), a first support part (212) which is integrally formed with the first puncture end part (210), arranged in the first puncture cavity (211), and used for supporting the inner plug (220) from the bottom and sealing the bottom of the first puncture cavity (211), an outer press edge (213) which is integrally formed with the first puncture end part (210) and bent and is used for being formed by means of hot-pressing bending so as to cooperate with the first support part (212) to fix the inner plug (220), and a first easy-to-tear film (214) attached to the upper end surface of the outer press edge (213) and used for sealing the top of the first puncture cavity (211). The first support part (212) comprises a first puncture part (215) arranged centrally.

Description

Hot-pressed closed-cell easy-tear film connector and infusion bag

Technical Field

The present invention relates to the technical field of infusion connectors, and in particular to a heat-pressed closed-cell easy-tear film connector. In addition, the present invention also relates to an infusion bag comprising the heat-pressed closed-cell easy-tear film connector.

Background technique

In existing infusion bags, the connector for inserting the infusion needle is usually in the form of a connector seat fixedly connected to a combined cover, and the combined cover usually includes an inner cover, an outer cover and an inner plug. This is because when the infusion bag is used for patient infusion treatment, the infusion bag is usually hung upside down so that the drug solution can be naturally infused into the patient's body under the action of gravity. Therefore, an inner plug is required to ensure the sealing during infusion and avoid leakage of the drug solution in the infusion bag. The inner plug is fixed by the cooperation of the inner and outer covers.

However, the inner and outer covers need to cooperate with each other to fix the inner plug, and the inner and outer covers need to be processed separately by injection molding, that is, at least two sets of molding molds corresponding to the inner and outer covers are required during the processing, which has high manufacturing costs. In addition, based on the high requirements for sealing of medical supplies, the assembly accuracy between the inner and outer covers is very high, and the processing is difficult.

Summary of the invention

The invention provides a hot-pressed closed-cell easy-tear film joint and an infusion bag, so as to solve the technical problems of high manufacturing cost and great processing difficulty of the joints on the existing infusion bags.

According to one aspect of the present invention, there is provided a hot-pressed closed-cell easy-tear film joint, comprising a joint seat and a first joint tube connected to the joint seat, the first joint tube comprising a first puncture end and an inner plug arranged in the first puncture end, the first puncture end comprising a first puncture cavity for accommodating the inner plug, a first supporting portion integrally formed with the first puncture end and arranged in the first puncture cavity for supporting the inner plug from the bottom and sealing the bottom of the first puncture cavity, an outer pressing edge integrally formed with the first puncture end and bent and arranged for fixing the inner plug by hot pressing and bending to cooperate with the first supporting portion, and a first easy-tear film attached to the upper end surface of the outer pressing edge for sealing the top of the first puncture cavity, the first supporting portion comprising a first puncture site arranged in the center.

As a further improvement of the above technical solution:

Furthermore, the first supporting portion includes a sinking ring extending in a direction away from the inner plug, and the first puncture site is connected to the sinking ring and is used to seal the bottom of the sinking ring.

Furthermore, the thickness of the first puncture site ranges from 0.30 mm to 0.50 mm.

Furthermore, a hot pressing groove is provided between the outer pressing edge and the first puncture end portion for facilitating the length setting and bending of the outer pressing edge during hot pressing.

Furthermore, the first joint tube includes two first puncture ends arranged at intervals in the radial direction, the two first puncture ends share the same first joint tube, and the inner plug and the first puncture ends are arranged in a one-to-one correspondence.

Furthermore, the joint includes two first joint pipes arranged at intervals along the length direction of the joint seat.

Furthermore, the first connector tube also includes a second puncture end portion, the second puncture end portion and the first puncture end portion are arranged at intervals along the radial direction of the first connector tube, and the second puncture end portion and the first puncture end portion share the same first connector tube, the second puncture end portion includes a second puncture cavity for interference fit with the infusion needle, a second puncture portion integrally formed with the second puncture end portion and arranged in the second puncture cavity for sealing the bottom of the second puncture cavity, and a second tearable film attached to the upper end surface of the second puncture end portion for sealing the top of the second puncture cavity.

Furthermore, the connector also includes a second connector tube connected to the connector seat, the second connector tube and the first connector tube are arranged at intervals along the length direction of the connector seat, the second connector tube includes a second puncture end portion, the second puncture end portion includes a second puncture cavity for interference fit with the infusion needle, a second puncture site integrally formed with the second puncture end portion and arranged in the second puncture cavity for sealing the bottom of the second puncture cavity, and a second tearable film attached to the upper end surface of the second puncture end portion for sealing the top of the second puncture cavity.

Furthermore, the joint also includes a third joint pipe connected to the joint seat, the third joint pipe includes a connecting end for connecting to the cover body, the connecting end includes a tapered opening with a tapered radial cross section and a connecting edge extending radially outward.

According to another aspect of the present invention, there is also provided an infusion bag, which comprises the above-mentioned heat-pressed closed-cell easy-tear film connector.

The present invention has the following beneficial effects:

The hot-pressed closed-cell easy-tear film connector of the present invention is integrally formed with the connector seat and the first connector tube by injection molding or fixed by welding. The connector seat is connected to the opening of the sealed infusion bag. The first connector tube fixes the inner plug through the first puncture end portion and guides the infusion needle to puncture the inner plug. The first puncture end portion first accommodates the inner plug through the first puncture cavity and then supports the inner plug through the first supporting portion. The first supporting portion and the first puncture end portion are integrally formed by injection molding, which has high reliability and can prevent the inner plug from being brought into the infusion bag when the infusion needle punctures the inner plug. At the same time, the first supporting portion seals the first puncture cavity. The bottom of the puncture cavity has good sealing performance, which can prevent the drug solution from being in contact with the inner plug for a long time and contaminating each other. The first support part is centrally provided with a first puncture site, and the thickness of the first puncture site is relatively thinner than the edge of the first support part, which is convenient for puncture. Then, the inner plug is pressed and fixed by the outer pressure edge to prevent the inner plug from moving and improve the sealing performance. The outer pressure edge and the first puncture end are integrally formed by an injection molding process, and during injection molding, the first puncture end is first axially extended to form a bent outer pressure edge, and then the outer pressure edge is bent toward the inner plug through a hot pressing process. The matrix density of the outer pressure edge is increased during the hot pressing and bending process. In addition, the bent outer pressure edge is completely close to and wrapped around the surface of the inner plug, with a compact structure and high reliability, which can prevent the inner plug from being pulled out when the infusion needle is pulled out, thereby preventing the liquid medicine in the infusion bag from leaking. Finally, the first easy-tear film is welded and covered on the upper end surface of the outer pressure edge through a welding process to seal the top of the first puncture cavity, thereby preventing the inner plug from contacting with the external environment and being contaminated. The first easy-tear film is easy to open, which is convenient for medical staff to use. The hot-pressed closed-cell easy-tear film connector of this scheme firstly adopts an injection molding process to obtain an integrally formed connector seat, a first connector tube, and a first puncture The end, the first supporting part and the unbent outer pressure edge are used to accommodate and support the inner plug, and then a hot pressing process is adopted to obtain a bent outer pressure edge to cooperate with the first supporting part to fix the inner plug, and finally a welding process is adopted to weld the first easy-tear film to seal the inner plug. The inner plug is reliably fixed and has good sealing performance, and will not come into contact with the medicine and the external environment. Compared with the prior art, a set of molding molds can be used to complete the manufacturing, and the manufacturing cost is low. The inner plug is fixed by hot pressing and bending the outer pressure edge, and the first easy-tear film is welded by a welding process. The difficulty of assembling them with each other is low, and the practicability is strong, which is suitable for wide promotion and application.

In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be further described in detail with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

FIG1 is a schematic structural diagram of a hot-pressed closed-cell easy-tear film joint according to Example 1 of the present invention;

FIG2 is a cross-sectional view of a hot-pressed closed-cell easy-tear film joint according to Example 1 of the present invention;

FIG3 is a cross-sectional view of a hot-pressed closed-cell easy-tear film joint according to Example 1 of the present invention;

FIG4 is a schematic structural diagram of a hot-pressed closed-cell easy-tear film joint according to Example 2 of the present invention;

FIG5 is a cross-sectional view of a hot-pressed closed-cell easy-tear film joint according to Example 2 of the present invention;

FIG6 is a cross-sectional view of a hot-pressed closed-cell easy-tear film joint according to Example 2 of the present invention;

7 is a schematic structural diagram of a hot-pressed closed-cell easy-tear film joint according to Embodiment 3 of the present invention;

FIG8 is a cross-sectional view of a hot-pressed closed-cell easy-tear film joint according to Example 3 of the present invention;

9 is a cross-sectional view of a hot-pressed closed-cell tearable film joint according to Example 3 of the present invention;

10 is a schematic structural diagram of a hot-pressed closed-cell easy-tear film joint according to Example 4 of the present invention;

11 is a cross-sectional view of a hot-pressed closed-cell tearable film joint according to Example 4 of the present invention;

12 is a cross-sectional view of a hot-pressed closed-cell tearable film joint according to Example 4 of the present invention;

13 is a schematic structural diagram of a hot-pressed closed-cell easy-tear film joint according to Example 5 of the present invention;

14 is a cross-sectional view of a hot-pressed closed-cell tearable film joint according to Example 5 of the present invention;

15 is a cross-sectional view of a hot-pressed closed-cell tearable film joint according to Example 5 of the present invention;

16 is a schematic structural diagram of a hot-pressed closed-cell easy-tear film joint according to Example 6 of the present invention;

17 is a cross-sectional view of a hot-pressed closed-cell tearable film joint according to Example 6 of the present invention;

18 is a cross-sectional view of the heat-pressed closed-cell tearable film joint of Example 6 of the present invention.

illustration:

100, connector seat; 200, first connector tube; 210, first puncture end; 211, first puncture cavity; 212, first support portion; 213, outer pressure edge; 214, first easy-tear film; 215, first puncture site; 216, sinking ring; 220, inner plug; 230, second puncture end; 231, second puncture cavity; 232, second puncture site; 233, second easy-tear film; 300, second connector tube; 400, third connector tube; 410, connection end; 411, tapered mouth; 412, connection edge.

Detailed ways

The embodiments of the present invention are described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

Fig. 1 is a schematic diagram of the structure of a hot-pressed closed-cell tear-away film joint according to embodiment 1 of the present invention; Fig. 2 is a cross-sectional view of a hot-pressed closed-cell tear-away film joint according to embodiment 1 of the present invention; Fig. 3 is a cross-sectional view of a hot-pressed closed-cell tear-away film joint according to embodiment 1 of the present invention; Fig. 4 is a schematic diagram of the structure of a hot-pressed closed-cell tear-away film joint according to embodiment 2 of the present invention; Fig. 5 is a cross-sectional view of a hot-pressed closed-cell tear-away film joint according to embodiment 2 of the present invention; Fig. 6 is a cross-sectional view of a hot-pressed closed-cell tear-away film joint according to embodiment 2 of the present invention; Fig. 7 is a schematic diagram of the structure of a hot-pressed closed-cell tear-away film joint according to embodiment 3 of the present invention; Fig. 8 is a cross-sectional view of a hot-pressed closed-cell tear-away film joint according to embodiment 3 of the present invention; Fig. 9 is a cross-sectional view of a hot-pressed closed-cell tear-away film joint according to embodiment 3 of the present invention; and Fig. 10 is A schematic structural diagram of a hot-pressed closed-cell tear-away film joint according to Example 4 of the present invention; Figure 11 is a cross-sectional view of a hot-pressed closed-cell tear-away film joint according to Example 4 of the present invention; Figure 12 is a cross-sectional view of a hot-pressed closed-cell tear-away film joint according to Example 4 of the present invention; Figure 13 is a schematic structural diagram of a hot-pressed closed-cell tear-away film joint according to Example 5 of the present invention; Figure 14 is a cross-sectional view of a hot-pressed closed-cell tear-away film joint according to Example 5 of the present invention; Figure 15 is a cross-sectional view of a hot-pressed closed-cell tear-away film joint according to Example 5 of the present invention; Figure 16 is a schematic structural diagram of a hot-pressed closed-cell tear-away film joint according to Example 6 of the present invention; Figure 17 is a cross-sectional view of a hot-pressed closed-cell tear-away film joint according to Example 6 of the present invention; Figure 18 is a cross-sectional view of a hot-pressed closed-cell tear-away film joint according to Example 6 of the present invention.

Example 1

As shown in Figures 1 and 2, the hot-pressed closed-cell easy-tear film joint of this embodiment includes a joint seat 100 and a first joint tube 200 connected to the joint seat 100, the first joint tube 200 includes a first puncture end 210 and an inner plug 220 arranged in the first puncture end 210, the first puncture end 210 includes a first puncture cavity 211 for accommodating the inner plug 220, a first support portion 212 integrally formed with the first puncture end 210 and arranged in the first puncture cavity 211 for supporting the inner plug 220 from the bottom and sealing the bottom of the first puncture cavity 211, an outer pressing edge 213 integrally formed with the first puncture end 210 and bent and arranged for fixing the inner plug 220 by hot pressing and bending to cooperate with the first supporting portion 212, and a first easy-tear film 214 attached to the upper end surface of the outer pressing edge 213 for sealing the top of the first puncture cavity 211, and the first supporting portion 212 includes a first puncture site 215 arranged in the center. Specifically, in the hot-pressed closed-cell easy-tear film connector of the present invention, the connector seat 100 and the first connector tube 200 are integrally formed by injection molding or fixed by welding. The connector seat 100 is connected to the opening of the sealed infusion bag. The first connector tube 200 fixes the inner plug 220 through the first puncture end 210 and guides the infusion needle to puncture the inner plug 220. The first puncture end 210 first accommodates the inner plug 220 through the first puncture cavity 211, and then supports the inner plug 220 through the first support portion 212. The first support portion 212 and the first puncture end 210 are integrally formed by injection molding, which has high reliability and can prevent the inner plug 220 from being brought into the infusion bag when the infusion needle punctures the inner plug 220. At the same time, the first support portion 212 seals the bottom of the first puncture cavity 211, and has good sealing performance, which can prevent the drug solution and the inner plug 220 from contacting for a long time and contaminating each other. The first puncture site 215 is arranged in the center of the part 212. The thickness of the first puncture site 215 is thinner than the edge of the first supporting part 212, which is convenient for puncture. Then, the inner plug 220 is pressed and fixed by the outer pressing edge 213 to prevent the inner plug 220 from moving and improve the sealing performance. The outer pressing edge 213 and the first puncture end 210 are integrally formed by an injection molding process, and during injection molding, the first puncture end 210 is first axially extended to form a bent outer pressing edge 213, and then the outer pressing edge 213 is bent toward the inner plug 220 through a hot pressing process. The matrix density of the outer pressing edge 213 increases during the hot pressing and bending process, and the bent outer pressing edge 213 is completely close to and wrapped around the surface of the inner plug 220. The structure is compact and the reliability is high. It can prevent the inner plug 220 from being brought out when the infusion needle is pulled out, thereby preventing the liquid medicine in the infusion bag from leaking. Finally, the first easy-tear film 214 is welded by a welding process. The outer edge 213 is covered on the upper end surface to seal the top of the first puncture cavity 211 to prevent the inner plug 220 from contacting with the external environment and being contaminated. The first easy-tear film 214 is easy to open, which is convenient for medical staff to use. The hot-pressed closed-cell easy-tear film connector of this scheme firstly adopts an injection molding process to obtain an integrally formed connector seat 100, a first connector tube 200, a first puncture end portion 210, a first support portion 212 and an unbent outer edge 213 to accommodate and support the inner plug 220, and then adopts a hot pressing process to obtain a bent The outer pressure edge 213 of the shape is used to cooperate with the first support part 212 to fix the inner plug 220, and finally the first easy-tear film 214 is welded by welding technology to seal the inner plug 220. The inner plug 220 is reliably fixed and has good sealing performance. It will not contact the medicine solution and the external environment. Compared with the prior art, a set of molding molds can be used to complete the manufacturing, and the manufacturing cost is low. The inner plug 220 is fixed by hot pressing and bending the outer pressure edge 213, and the first easy-tear film 214 is welded by welding technology. The difficulty of assembly between them is low, and the practicability is strong, which is suitable for wide promotion and application. It should be understood that the injection molding process, hot pressing process and welding process are all well-known technical means for those skilled in the art, and will not be elaborated here. Optionally, the connector seat 100 is arranged in a boat shape and welded to the opening of the infusion bag by welding technology.

As shown in FIG. 3 , in this embodiment, the first support portion 212 includes a first sinking ring 216 extending in a direction away from the inner plug 220, and the first puncture site 215 is connected to the first sinking ring 216 and is used to seal the bottom of the first sinking ring 216. Specifically, the first sinking ring 216 is extended in a direction away from the inner plug 220, and the first puncture site 215 is connected to the first sinking ring 216 to seal the bottom of the first sinking ring 216. The first sinking ring 216 increases the distance between the first puncture site 215 and the inner plug 220, so that the needle of the infusion needle completely passes through the inner plug 220 before puncturing the first puncture site 215, and avoids the needle of the infusion needle from being hindered by the inner plug 220 when puncturing the first puncture site 215 as much as possible, so that the needle of the infusion needle has sufficient puncture cutting force to puncture the first puncture site 215, thereby minimizing or eliminating the generation of insoluble particles during puncture, and even if insoluble particles are generated when puncturing the inner plug 220, they can be blocked in the space enclosed by the first puncture site 215 and the inner plug 220, and at the same time, the inner plug 220 can be effectively ensured not to be over-compacted, so that the inner plug 220 has a relatively free space for expansion, so as to give full play to the elastic effect of the inner plug 220 itself, eliminate internal stress, reduce cutting resistance, and minimize or eliminate the probability of insoluble particles being generated, and the probability of insoluble particles entering the liquid medicine, so as to ensure the safety of infusion. Optionally, the sinking ring 216 is formed by extending from the middle part of the first support part 212 in the direction away from the inner plug 220 to guide the puncture of the infusion needle. Optionally, the radial dimension of the sinking ring 216 is 1/3 to 4/5 of the radial dimension of the first support portion 212; when the radial dimension of the sinking ring 216 is between 1/3 and 4/5 of the radial dimension of the first support portion 212, the sinking ring 216 is adapted to the outer diameter of the infusion needle, thereby improving the sealing performance, preventing leakage of the drug solution, and not jamming the infusion needle; when the radial dimension of the sinking ring 216 is less than 1/3 of the radial dimension of the first support portion 212, the sinking ring 216 will jam the infusion needle, causing the infusion needle to be unable to puncture; when the radial dimension of the sinking ring 216 is greater than 4/5 of the radial dimension of the first support portion 212, the gap between the sinking ring 216 and the infusion needle is too large, and the drug solution is prone to leak. Optionally, the sinking depth of the sinking ring 216 relative to the first supporting portion 212 is 0.5 mm to 3 mm; when the sinking depth of the sinking ring 216 relative to the first supporting portion 212 is between 0.5 mm and 3 mm, the distance between the first supporting portion 212 and the inner plug 220 is appropriate, and the needle tip of the infusion needle can pass through the inner plug 220 and then puncture the first puncture site 215, thereby reducing the cutting resistance and thereby reducing the probability of puncture debris; when the sinking depth of the sinking ring 216 relative to the first supporting portion 212 is less than 0.5 mm, the cutting resistance of the needle tip of the infusion needle during puncture is large, and puncture debris is easily generated; when the sinking depth of the sinking ring 216 relative to the first supporting portion 212 is greater than 3 mm, the length of the infusion needle is limited and the first puncture site 215 may not be punctured.

As shown in FIG. 2 , in this embodiment, the thickness of the first puncture site 215 ranges from 0.30 mm to 0.50 mm. Specifically, when the thickness of the first puncture site 215 is between 0.30 mm and 0.50 mm, the first puncture site 215 has appropriate strength, low puncture difficulty, and is not easy to break when punctured, causing insoluble particles to fall into the liquid medicine; when the thickness of the first puncture site 215 is less than 0.30 mm, it is easy to be burned through during the injection molding process and cannot be used, and the strength is too low, and it is easy to break when punctured, causing insoluble particles to fall into the liquid medicine; when the thickness of the first puncture site 215 is greater than 0.50 mm, the strength of the first puncture site 215 is too high, a large cutting resistance will be generated during the puncture process, the puncture difficulty is too great, and the probability of insoluble particles being generated is increased. Preferably, the thickness of the first puncture site 215 is 0.40 mm. When the thickness of the first puncture site 215 is 0.40 mm, the comprehensive performance is the best.

As shown in FIG2 , in this embodiment, a hot pressing groove is provided between the outer pressing edge 213 and the first puncture end 210 to facilitate the fixed length and bending of the outer pressing edge 213 during hot pressing. Specifically, by providing the hot pressing groove, the outer pressing edge 213 is easy to bend during hot pressing to ensure the flatness of the upper end surface of the outer pressing edge 213 after bending and forming, thereby improving the sealing of the first easy-tear film 214 after welding, and the bending length depends on the setting position of the hot pressing groove, so that the size of the outer pressing edge 213 is relatively fixed, which is convenient for injection molding. It should be understood that the thickness of the hot pressing groove base is relatively thin and the strength is low, but after hot pressing, local welding and reinforcement are performed at the hot pressing groove, which improves the strength of the hot pressing groove base and has reliable strength.

As shown in Fig. 2, in this embodiment, a first inner spherical surface is concave downwardly formed on the top of the inner plug 220. Specifically, the first inner spherical surface reduces the puncture thickness when the infusion needle punctures the inner plug 220, thereby reducing the puncture difficulty and the cutting resistance.

As shown in Fig. 2, in this embodiment, the bottom of the inner plug 220 is concavely provided with a second inner spherical surface. Specifically, the second inner spherical surface reduces the puncture thickness of the inner plug 220 when the infusion needle punctures it, thereby reducing the puncture difficulty and the cutting resistance.

As shown in FIG2 , in this embodiment, the thickness of the outer edge 213 is in the range of 1.0-2.0 mm. Specifically, when the thickness of the outer edge 213 is between 1.0-2.0 mm, the strength of the outer edge 213 is appropriate and it is easy to bend and shape during hot pressing; when the thickness of the outer edge 213 is less than 1.0 mm, the strength of the outer edge 213 cannot be guaranteed, and it may break during the hot pressing and bending process, making it difficult to bend; when the thickness of the outer edge 213 is greater than 2.0 mm, the internal stress of the outer edge 213 is too large when it is bent, and it is easy to break at the bend, making it difficult to bend.

As shown in FIG2 , in this embodiment, the edge of the first easy-tear film 214 is provided with an easy-tear edge extending radially outward. Specifically, the easy-tear edge facilitates medical personnel to tear off the first easy-tear film 214 to expose the inner plug 220. Optionally, the easy-tear edge is provided with anti-slip patterns for increasing friction, and the anti-slip patterns are concave-convex structures.

Example 2

As shown in Figures 4 to 6, the difference between this embodiment and embodiment 1 is that the first connector tube 200 includes two first puncture ends 210 arranged at intervals in the radial direction, the two first puncture ends 210 share the same first connector tube 200, and the inner plug 220 and the first puncture end 210 are arranged one by one. Specifically, the two first puncture ends 210 are used to achieve separate medication and infusion, avoiding the risk of contamination caused by repeated puncture of an inner plug 220 when using a first puncture end 210 for medication and infusion. Optionally, the radius of the inner plug 220 in the two first puncture ends 210 is different, the small inner plug 220 in the first puncture end 210 is used for medication, and the large inner plug 220 in the first puncture end 210 is used for infusion. The two inner plugs 220 of different sizes are convenient for medical staff to distinguish and use. Optionally, the inner plugs 220 in the two first puncture ends 210 have different colors, which is convenient for medical staff to distinguish and use. Optionally, the first connector tube 200 is formed by injection molding of a transparent material, so that medical personnel can directly observe the size or color of the inner plug 220 .

Example 3

As shown in Figures 7 to 9, the difference between this embodiment and Example 1 is that the connector includes two first connector tubes 200 arranged at intervals along the length direction of the connector seat 100. Specifically, the two first connector tubes 200 are installed on the same connector seat 100, and the two first connector tubes 200 are used to respectively perform medication and infusion, thereby avoiding the risk of contamination caused by repeated puncture of an inner plug 220 when using a first connector tube 200 for medication and infusion. Optionally, the inner plugs 220 in the two first connector tubes 200 have different radii, wherein the inner plug 220 with a small radius is used for medication, and the inner plug 220 with a large radius is used for infusion, and the two inner plugs 220 of different sizes are used to facilitate medical staff to distinguish and use. Optionally, the inner plugs 220 in the two first connector tubes 200 have different colors, respectively, to facilitate medical staff to distinguish and use. Optionally, the first connector tube 200 is formed by injection molding of a transparent material, so that medical staff can directly observe the size or color of the inner plug 220. Optionally, the two first connector tubes 200 have different diameters. The first connector tube 200 with a smaller diameter is used for dispensing medicine, and the first connector tube 200 with a larger diameter is used for infusion, so that medical staff can distinguish and use them easily.

Example 4

As shown in Figures 10 to 12, the difference between this embodiment and Embodiment 1 is that: the first connector tube 200 also includes a second puncture end 230, the second puncture end 230 and the first puncture end 210 are arranged at intervals along the radial direction of the first connector tube 200, and the second puncture end 230 and the first puncture end 210 share the same first connector tube 200, the second puncture end 230 includes a second puncture cavity 231 for interference fit with the infusion needle, a second puncture portion 232 integrally formed with the second puncture end 230 and arranged in the second puncture cavity 231 for sealing the bottom of the second puncture cavity 231, and a second easy-tear film 233 attached to the upper end surface of the second puncture end 230 for sealing the top of the second puncture cavity 231. Specifically, the first puncture end 210 is used for dispensing medicine, and the second puncture end 230 is used for infusion. The puncture guide of the infusion needle is realized through the second puncture cavity 231, and the inner diameter of the second puncture cavity 231 is interference-fitted with the outer diameter of the infusion needle to achieve sealing after puncture. The bottom of the second puncture cavity 231 is sealed by the second puncture site 232, and the second puncture site 232 and the second puncture end 230 are integrally formed, with good sealing performance to prevent leakage of liquid medicine. The top of the second puncture cavity 231 is sealed by the second tearable film 233 to prevent the second puncture cavity 231 from contacting with the external environment and being contaminated. It should be understood that the inner plug 220 is a key part that affects the sealing of the joint, and its price is often relatively expensive. However, this solution achieves sealing after puncture and infusion through the second puncture cavity 231 that is interference-fitted with the infusion needle, so as to achieve sealing during puncture and infusion without using the inner plug 220, which greatly reduces the manufacturing cost of the joint. Optionally, the first tear film 214 and the second tear film 233 are the same film, and a break mark is provided between the first tear film 214 and the second tear film 233. Optionally, in another embodiment, the first tear film 214 and the second tear film 233 are separate films arranged at intervals from each other.

In this embodiment, the thickness of the second puncture site 232 ranges from 0.30 mm to 0.50 mm. Specifically, when the thickness of the second puncture site 232 is between 0.30 mm and 0.50 mm, the second puncture site 232 has appropriate strength and low puncture difficulty; when the thickness of the second puncture site 232 is less than 0.30 mm, it is easy to be burned through during the injection molding process and cannot be used; when the thickness of the second puncture site 232 is greater than 0.50 mm, the strength of the second puncture site 232 is too high and the puncture difficulty is too great. Preferably, the thickness of the second puncture site 232 is 0.40 mm. When the thickness of the second puncture site 232 is 0.40 mm, the comprehensive performance is optimal.

Example 5

As shown in Figures 13-15, the difference between this embodiment and Example 1 is that: the connector also includes a second connector tube 300 connected to the connector seat 100, the second connector tube 300 and the first connector tube 200 are arranged at intervals along the length direction of the connector seat 100, the second connector tube 300 includes a second puncture end 230, the second puncture end 230 includes a second puncture cavity 231 for interference fit with the infusion needle, a second puncture site 232 integrally formed with the second puncture end 230 and arranged in the second puncture cavity 231 for sealing the bottom of the second puncture cavity 231, and a second easy-tear film 233 attached to the upper end surface of the second puncture end 230 for sealing the top of the second puncture cavity 231. Specifically, the first connector tube 200 is used for dispensing medicine, and the second connector tube 300 is used for infusion. The second connector tube 300 facilitates puncture by the infusion needle through the second puncture end 230, and the puncture guide of the infusion needle is realized through the second puncture cavity 231, and the inner diameter of the second puncture cavity 231 is interference fit with the outer diameter of the infusion needle to achieve sealing after puncture, and the bottom of the second puncture cavity 231 is sealed through the second puncture site 232, and the second puncture site 232 and the second puncture end 230 are integrally formed, with good sealing performance to prevent liquid medicine from leaking, and the top of the second puncture cavity 231 is sealed through the second tearable film 233 to prevent the second puncture cavity 231 from contacting with the external environment and being contaminated. It should be understood that the inner plug 220 is a key part that affects the sealing of the connector, and its price is often relatively expensive, but this solution realizes the sealing after puncture and infusion through the second puncture cavity 231 that is interference fit with the infusion needle, so as to achieve sealing during puncture and infusion without using the inner plug 220, which greatly reduces the manufacturing cost of the connector. Optionally, the outer diameter of the first joint tube 200 is smaller than the outer diameter of the second joint tube 300, so that medical staff can distinguish and use them. Optionally, the first joint tube 200 and/or the second joint tube 300 are formed by injection molding of transparent materials, so that medical staff can directly observe whether there is an inner plug 220. Optionally, the first easy-tear film 214 and the second easy-tear film 233 are the same film of a conjoined body, and an easy-to-break mark is provided between the first easy-tear film 214 and the second easy-tear film 233. Optionally, in another embodiment, the first easy-tear film 214 and the second easy-tear film 233 are split films arranged at intervals from each other. Optionally, the maximum outer diameter of the first puncture end 210 is smaller than the maximum outer diameter of the first joint tube 200, and the maximum outer diameter of the second puncture end 230 is smaller than the maximum outer diameter of the second joint tube 300, so as to save the cost of raw materials, and to open the distance between the first puncture end 210 and the second puncture end 230 for easy operation.

In this embodiment, the thickness of the second puncture site 232 ranges from 0.30mm to 0.50mm. Specifically, when the thickness of the second puncture site 232 is between 0.30mm and 0.50mm, the second puncture site 232 has appropriate strength and low puncture difficulty; when the thickness of the second puncture site 232 is less than 0.30mm, it is easy to be burned through during the injection molding process and cannot be used; when the thickness of the second puncture site 232 is greater than 0.50mm, the strength of the second puncture site 232 is too high, and a large cutting resistance will be generated during the puncture process, and the puncture difficulty is too great. Preferably, the thickness of the second puncture site 232 is 0.40mm. When the thickness of the second puncture site 232 is 0.40mm, the comprehensive performance is optimal.

Example 6

As shown in Figures 16 to 18, the difference between this embodiment and embodiment 1 is that the connector also includes a third connector tube 400 connected to the connector seat 100, and the third connector tube 400 includes a connection end 410 for connecting the cover body, and the connection end 410 includes a tapered mouth 411 with a conical radial cross section and a connection edge 412 extending radially outward. Specifically, the first connector tube 200 is used for dispensing, and the third connector tube 400 is used for infusion. The third connector tube 400 is connected to the cover body through the connection end 410 to achieve the sealing of the third connector tube 400, and is connected to the cover body through the connection edge 412 to adapt to the cover bodies of different sizes, and is connected to the cover bodies of different radial sizes through the tapered mouth 411 to ensure stable puncture of the infusion needle. It should be understood that the third connector tube 400 is connected to the cover bodies of different structures and forms in the prior art, so as to be manufactured and assembled according to different needs, thereby improving the scope of application.

The infusion bag of this embodiment includes the heat-pressed closed-cell easy-tear film joint in any of the above embodiments. Specifically, the opening of the infusion bag is sealed by using the heat-pressed closed-cell easy-tear film joint to reduce manufacturing costs and processing difficulty, and the bag is highly practical and suitable for wide promotion and application.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

A hot-pressed closed-cell easy-tear film joint, comprising a joint seat (100) and a first joint tube (200) connected to the joint seat (100), the first joint tube (200) comprising a first puncture end (210) and an inner plug (220) arranged in the first puncture end (210), characterized in that the first puncture end (210) comprises a first puncture cavity (211) for accommodating the inner plug (220), a first puncture cavity (211) integrally formed with the first puncture end (210) and arranged in the first puncture cavity (211) for accommodating the inner plug (220), and a first puncture cavity (211) for accommodating the inner plug (220) from the bottom. A first supporting portion (212) supporting an inner plug (220) and sealing the bottom of a first puncture cavity (211), an outer pressing edge (213) integrally formed with the first puncture end portion (210) and bent and arranged for use in hot pressing and bending to cooperate with the first supporting portion (212) to fix the inner plug (220), and a first easy-tear film (214) attached to the upper end surface of the outer pressing edge (213) for sealing the top of the first puncture cavity (211), wherein the first supporting portion (212) includes a first puncture portion (215) arranged in the center.
The hot-pressed closed-cell easy-tear film joint according to claim 1 is characterized in that the first supporting portion (212) includes a sinking ring (216) extending in a direction away from the inner plug (220), and the first puncture portion (215) is connected to the sinking ring (216) and is used to seal the bottom of the sinking ring (216).
The hot-pressed closed-cell easy-tear film joint according to claim 1 is characterized in that the thickness of the first puncture portion (215) ranges from 0.30 mm to 0.50 mm.
The hot-pressed closed-cell easy-tear film joint according to claim 1 is characterized in that a hot-pressing groove is provided between the outer pressing edge (213) and the first puncture end (210) for facilitating the outer pressing edge (213) to be fixed in length and bent during hot pressing.
According to the hot-pressed closed-cell easy-tear film joint according to claim 1, it is characterized in that the first joint tube (200) includes two first puncture ends (210) arranged at intervals in the radial direction, the two first puncture ends (210) share the same first joint tube (200), and the inner plug (220) and the first puncture ends (210) are arranged in a one-to-one correspondence.
The hot-pressed closed-cell easy-tear film joint according to claim 1 is characterized in that the joint comprises two first joint tubes (200) arranged at intervals along the length direction of the joint seat (100).
The hot-pressed closed-cell easy-tear film connector according to claim 1 is characterized in that the first connector tube (200) further includes a second puncture end portion (230), the second puncture end portion (230) and the first puncture end portion (210) are arranged at intervals along the radial direction of the first connector tube (200), and the second puncture end portion (230) and the first puncture end portion (210) share the same first connector tube (200), the second puncture end portion (230) includes a second puncture cavity (231) for interference fit with an infusion needle, a second puncture portion (232) integrally formed with the second puncture end portion (230) and arranged in the second puncture cavity (231) for sealing the bottom of the second puncture cavity (231), and a second easy-tear film (233) attached to the upper end surface of the second puncture end portion (230) for sealing the top of the second puncture cavity (231).
The hot-pressed closed-cell easy-tear film connector according to claim 1 is characterized in that the connector also includes a second connector tube (300) connected to the connector seat (100), the second connector tube (300) and the first connector tube (200) are arranged at intervals along the length direction of the connector seat (100), and the second connector tube (300) includes a second puncture end (230), the second puncture end (230) includes a second puncture cavity (231) for interference fit with an infusion needle, a second puncture portion (232) integrally formed with the second puncture end (230) and arranged in the second puncture cavity (231) for sealing the bottom of the second puncture cavity (231), and a second easy-tear film (233) attached to the upper end surface of the second puncture end (230) for sealing the top of the second puncture cavity (231).
According to the hot-pressed closed-cell easy-tear film joint according to claim 1, it is characterized in that the joint also includes a third joint tube (400) connected to the joint seat (100), the third joint tube (400) includes a connecting end (410) for connecting to the cover body, and the connecting end (410) includes a tapered mouth (411) with a conical radial cross-section and a connecting edge (412) formed outside the tapered mouth (411) and extending radially outward.
An infusion bag, characterized by comprising the hot-pressed closed-cell easy-tear film connector according to claim 1.