WO2017219745A1

WO2017219745A1 - Combined cap

Info

Publication number: WO2017219745A1
Application number: PCT/CN2017/081052
Authority: WO
Inventors: 张文芳; 章卫东; 梁爱民; 修朝霞; 刘建东
Original assignee: 雷诺丽特恒迅包装科技（北京）有限公司
Priority date: 2016-06-24
Filing date: 2017-04-19
Publication date: 2017-12-28
Also published as: CN107536711A; CN107536711B; BR112018076896A2

Abstract

A combined cap comprises a needle-type spool (1), a connecting cap (2), and an outer cap (3). The needle-type spool (1) is provided with a spool upper cap (11) and a spool lower cap (12) vertically linked. A spool rubber plug (13) is disposed between the spool upper cap (11) and the spool lower cap (12). The spool lower cap (12) is provided with a needle-shaped head (121), a liquid flowing channel (1211) is arranged in the needle-shaped head (121), and multiple liquid flowing holes (1212) communicating with the liquid flowing channel (1211) are formed in the end portion of the needle-shaped head (121). The spool rubber plug (13) is provided with a cavity (131), and the cavity (131) communicates with the liquid flowing channel (1211) in an opposite manner. A sealing film (21) is disposed in the connecting cap (2), the spool lower cap (12) is sealed in the connecting cap (2), and the needle-shaped head (121) is disposed opposite to the sealing film (21). The outer cap (3) is sleeved outside the spool upper cap (11) and is sealed on the connecting cap (2). By means of the combined cap, needleless dosing and/or needleless drug delivery can be implemented; the combined cap has a simple structure and is convenient to use.

Description

Combination cover

Technical field

The present invention relates to a combination cover, and more particularly to a combination cover for needle-free dosing and/or drug delivery in the field of medical devices.

Background technique

In the pharmaceutical preparation process before daily infusion, it is necessary to add therapeutic drugs to the infusion bottle or bag. Traditionally, the liquid in the large infusion package is taken out using a disposable syringe with a steel needle, and then injected. In the powdered vial, afterwards, the powder in the vial is dissolved. After the powder in the vial is completely dissolved, the dissolved solution is pumped into the syringe through a disposable syringe with a steel needle, and then The liquid medicine in the syringe is injected into the infusion bag or the infusion bottle.

When infusion, use a disposable infusion set with a steel needle or a plastic needle to puncture the rubber gasket of the lid, so that the liquid in the large infusion package establishes a passage through the steel needle or the plastic needle, and injects the liquid into the patient.

The large infusion package combination caps currently in use can only be used with conventional infusion sets and syringes, and needleless connections are not possible. When using a traditional syringe with a steel needle to do the drug, it is necessary to repeatedly pierce the rubber gasket with a steel needle, which will cause the glue residue of the gasket to fall into the liquid medicine, and at the same time, the medicine is repeatedly applied and repeatedly pierced. Rubber gaskets are also prone to leakage problems at the puncture site after dosing. In addition, when the nurse performs the drug puncture operation, the steel needle of the syringe is easy to stab the nurse's finger, posing a threat to the health; during the operation, in order to improve the efficiency and reduce the puncture resistance, the steel with a relatively large diameter is usually used. Needle, this will make it easier to cause the rubber gasket to fall off the glue and the leakage of the puncture site; in the case of infusion, use the steel needle or plastic needle, and also puncture the rubber gasket in the combination cover, causing the rubber debris to fall off. Especially for plastic needles, due to the large diameter, the resistance during puncture is large, which is inconvenient for the nurse to use, and in the process of infusion, due to the external force, the steel needle or plastic needle can be used from the composite cover gasket. Sliding out, causing the needle to be removed, especially after the plastic needle is pulled out, the leakage will not occur in time, and the leakage of the liquid will affect or harm the patient.

Therefore, it is necessary to provide a new combination cover to overcome the above problems.

Summary of the invention

SUMMARY OF THE INVENTION It is an object of the present invention to provide a combination cover which enables needle-free dosing and/or needle-free drug delivery, which is simple in structure and convenient to use.

The invention provides a combined cover, the combined cover comprising:

a pin valve core having a valve upper cover and a valve core lower cover connected up and down, a valve plug rubber plug between the valve core upper cover and the valve core lower cover, the valve core lower cover having a needle a head having a liquid flow path therein, the end of the needle head being provided with a plurality of liquid flow holes communicating with the liquid flow path, the valve plug having a cavity The cavity is in communication with the liquid flow channel;

a connecting cover having a sealing film disposed therein, the valve core lower cover sealingly disposed in the connecting cover, the needle head being disposed opposite to the sealing film;

The outer cover is sleeved on the outside of the upper cover of the valve core and is sealed on the connecting cover.

The feature and advantage of the combined cover of the present invention is that the needle valve core of the combined cover can realize needle-free dosing and/or needle-free drug delivery, and the pinion head of the needle valve core can be used to pierce the rubber plug and/or The purpose of the sealing film, at the same time, by pressing the valve plug of the needle valve core, the gap slit on the plug rubber plug is opened to establish a liquid passage, and when the pressing force acting on the plug rubber plug is removed The slit of the valve plug is closed and the liquid passage is closed. The combined cover is simple in structure and convenient to use, and effectively realizes the technical purpose of needle-free dosing and/or needle-free drug delivery, and avoids the prior art. The needling head repeatedly pierces the rubber plug or the sealing film, which brings about problems of the rubber plug falling off and the sealing is not strict.

DRAWINGS

Figure 1 is a perspective view of the combination cover of the present invention.

Fig. 2 is a cross-sectional view taken along line A-A of Fig. 1;

Fig. 3 is a cross-sectional view taken along line B-B of Fig. 1;

Figure 4 is a perspective view of the composite cover of the present invention with the broken portion of the outer cover removed.

Fig. 5 is a cross-sectional view taken along line C-C of Fig. 4;

Fig. 6 is a cross-sectional view taken along line D-D of Fig. 4;

Figure 7 is a perspective view of the composite cover of the present invention with the broken portion of the outer cover removed, the needle valve core piercing the sealing film and the rubber stopper.

Fig. 8 is a cross-sectional view taken along line E-E of Fig. 7;

Fig. 9 is a cross-sectional view taken along line F-F of Fig. 7;

Figure 10 is a perspective view of another embodiment of the composite cover of the present invention.

Fig. 11 is a cross-sectional view taken along line G-G of Fig. 10;

Fig. 12 is a cross-sectional view taken along line H-H of Fig. 10;

Figure 13 is a perspective view of another embodiment of the outer cover of the present invention.

Figure 14 is a front elevational view of another embodiment of the outer cover of the present invention.

Figure 15 is a side elevational view of another embodiment of the outer cover of the present invention.

Figure 16 is a plan view of another embodiment of the outer cover of the present invention.

Figure 17 is a bottom plan view of another embodiment of the outer cover of the present invention.

Figure 18 is a front cross-sectional view showing another embodiment of the outer cover of the present invention.

Figure 19 is a perspective view of still another embodiment of the outer cover of the present invention.

Figure 20 is a front cross-sectional view showing still another embodiment of the outer cover of the present invention.

Figure 21 is a side cross-sectional view showing still another embodiment of the outer cover of the present invention.

Figure 22 is a front elevational view of another embodiment of the composite cover of the present invention.

Figure 23 is a side elevational view of another embodiment of the composite closure of the present invention.

Fig. 24 is a sectional view taken along line J-J of Fig. 23;

Figure 25 is a cross-sectional view taken along line I-I of Figure 22 .

Figure 26 is a front elevational view of still another embodiment of the composite cover of the present invention.

Figure 27 is a side elevational view of still another embodiment of the composite closure of the present invention.

Figure 28 is a cross-sectional view taken along line L-L of Figure 27 .

Figure 29 is a cross-sectional view taken along the line K-K of Figure 26 .

Figure 30 is a perspective view of another embodiment of the valve core lower cover of the needle valve body of the present invention.

Figure 31 is a plan view of another embodiment of the valve core lower cover of the needle valve spool of the present invention.

Figure 32 is a cross-sectional view of the composite cover of the present invention with the broken portion of the outer cover removed.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

As shown in FIG. 1 to FIG. 3, the present invention provides a composite cover comprising a needle valve core 1, a connecting cover 2 and an outer cover 3, wherein: the needle spool 1 has a valve upper cover 11 connected up and down and a spool lower cover 12, a spool plug 13 is disposed between the spool upper cover 11 and the spool lower cover 12, and the spool lower cover 12 has a needle head 121, and the needle head 121 a liquid flow channel 1211 is defined therein, and a plurality of liquid flow holes 1212 communicating with the liquid flow channel 1211 are opened at an end of the needle-shaped head 121, and the valve plug rubber plug 13 has a cavity 131, The cavity 131 is in communication with the liquid flow channel 1211; the sealing cover 21 is disposed in the connecting cover 2, and the valve core lower cover 12 is sealingly disposed in the connecting cover 2, the needle head 121 and the sealing The film 21 is oppositely disposed; the outer cover 3 is sleeved on the outside of the valve upper cover 11 and is sealingly disposed on the connecting cover 2.

Specifically, the needle spool 1 is composed of a valve core upper cover 11, a valve core lower cover 12, and a valve plug rubber plug 13, which is a core component of the present invention, which realizes needle-free dosing and/or Or the main components of the drug. In the present embodiment, the valve core upper cover 11 is substantially in the shape of a truncated cone of the upper end, and an outer thread section 111 is provided on the outer side of the upper end of the valve core upper cover 11, and the externally threaded section 111 can be The head or threaded Luer connector is connected to facilitate fitting to an existing syringe, blender or infusion set with a Luer head or Luer connector.

The spool lower cover 12 includes a needle-shaped head 121 which is similar in shape to a conventional medical needle having a puncture tip through which the purpose of piercing the rubber stopper or the sealing film can be achieved; at the same time, the needle-shaped head The design of the 121 retains the grip of the original rubber plug to the needle of the trocar. The needle head 121 has a liquid flow path 1211. The puncture tip of the needle head 121 is provided with one or more liquid flow holes 1212 communicating with the liquid flow path 1211. In the present embodiment, the upper end of the spool lower cover 12 is formed with a groove 122 that communicates with the liquid flow path 1211 of the needle head 121; further, the upper end surface of the valve core lower cover 12 A ring convex portion 123 is also formed, and a lower end of the valve core upper cover 11 is sleeved and connected to the outer side of the ring convex portion 123.

The spool plug 13 is generally in the shape of a truncated cone having an upper end constricted, and a cavity 131 is provided in a middle portion of the spool plug 13 , and the cavity 131 is connected to the bottom of the plug plug 13 , the spool plug 13 The lower end is inserted into the recess 122 of the spool lower cover 12 such that the cavity 131 of the spool plug 13 communicates with the liquid flow passage 1211 of the spool lower cover 12; the upper end of the spool plug 13 is formed The neck portion 132 is sealed and inserted into the upper end of the valve core upper cover 11 , that is, the upper end of the valve core upper cover 11 is sleeved on the neck portion 132 of the upper end of the valve plug 13 . The upper end of the spool plug 13 forms an interference fit with the upper end of the spool upper cover 11.

In the present embodiment, the upper end of the spool plug 13 is formed with a slit slit 133 which communicates with the cavity 131. Specifically, the upper end constricted portion 132 of the plug rubber plug 13 is a solid portion, and the slit slit 133 is a vertically penetrating slit formed in the solid constricted portion 132, and the slit slit 133 is a long slit. It is located in the middle of the constricted portion 132, and the length of the slit slit 133 is smaller than the diameter of the constricted portion 132, and both ends of the slit incision 133 do not penetrate the outer periphery of the constricted portion 132. In the state where the plug rubber plug 13 is not used, the slit slit 133 is closed due to the elastic action of the rubber plug itself, which prevents the cavity 131 of the plug rubber plug 13 from coming into communication with the outside; In the state of the core rubber plug 13, when the syringe, the drug mixture or the infusion set is screwed to the externally threaded section 111 of the valve upper cap 11, or connected to the inner diameter of the valve upper cap 11 by means of a plug After that, the inner diameter of the upper cap 11 of the valve core will form an interference fit with the common injector head. The following is an example of a syringe: the syringe currently has an ordinary infusion set with a Luer lock structure and no Luer lock structure. The syringe of the Luer lock structure is connected to the upper cover 11 of the valve core by screwing, and the injector head forms an interference fit with the inner diameter of the upper cover 11 of the valve core; for a common syringe head, an ordinary syringe is required. The head is inserted into the upper cover 11 of the valve core, An interference fit is formed with the inner diameter of the valve cartridge upper cover 11. At this time, the ordinary syringe head will press the constricted portion 132 of the plug rubber plug 13, so that the slit slit 133 of the constricted portion 132 is opened to form a passage communicating with the cavity 131 for injection or infusion. After the syringe head is separated from the constricted portion 132, due to the resilience of the plug rubber plug 13 itself, the slit slit 133 of the constricted portion 132 is reclosed to form a sealed state, so as to ensure that the liquid medicine does not leak and the interior of the combined cover is cleaned. Sex.

The connecting cover 2 is substantially cylindrical and has a sealing film 21 therein. When the lower end of the connecting cover 2 is welded to the joint 4 of the existing medical infusion bag or the infusion bottle, the sealing film 21 can isolate the liquid medicine and the outside air. To prevent the occurrence of contaminated liquids. Further, the outer edge of the upper end of the connecting cover 2 is formed with a connecting ring 24 for connecting with the outer cover 3.

In a possible embodiment of the outer cover 3 of the present invention, as shown in FIGS. 2, 3, 11, and 12, the outer cover 3 has a breaking portion 31 and a connecting portion 32 between the breaking portion 31 and the connecting portion 32. The easy-folding portion 33 is formed as an annular groove or a discontinuous groove disposed between the breaking portion 31 and the connecting portion 32, and the folding portion 33 can facilitate the breaking portion 31 to be broken from the connecting portion 32. Separating; the breaking portion 31 is substantially cylindrical, and two radially symmetrical pressing plates 34 are protruded from the outer wall of the breaking portion 31, and the two pressing plates 34 are respectively pressed by the two fingers of one hand to make the breaking portion The 31 is twisted with respect to the connecting portion 32 to break the foldable portion 33, and the separation of the breaking portion 31 from the connecting portion 32 is achieved. The outer cover 3 is sleeved on the outer side of the valve core upper cover 11 of the needle valve body 1 and is sealingly connected to the upper end of the connection cover 2. The inner diameter of the outer cover 3 is slightly larger than the outer diameter of the upper cover 11 of the valve core, so that the outer cover 3 Fitted. In the present embodiment, the connecting portion 32 of the outer cover 3 and the connecting ring 24 of the connecting cover 2 are sealingly connected by welding, so that contamination inside the combined cover can be avoided.

In another possible embodiment of the outer cover 3 of the present invention, the outer cover 3 is a pull-type outer cover, as shown in FIGS. 13 to 18, and with reference to FIGS. 22 to 25, the outer cover 3 has a break. The connecting portion 311 and the connecting portion 32 are connected to the upper end surface of the breaking portion 31 via the connecting member 311. In the present embodiment, the pull ring 312, the connecting member 311 and the breaking portion 31 are formed as a whole; As shown in FIG. 15 and FIG. 17, the breaking portion 31 is provided with a foldable portion 33 including two vertical slits 331 and two annular opening grooves 332 which are disposed on the outer side wall of the breaking portion 31. And two horizontal slots 333 disposed on the top wall of the breaking portion 31, wherein the upper ends of the two vertical slots 331 are respectively connected with one ends of the two horizontal slots 333, and the two vertical slots 331 The lower ends are respectively connected to one free end of the two annular opening grooves 332, and the other free ends of the two annular opening grooves 332 are terminated at the lower ends of the two vertical slits 331. The connecting member 311 is located at the other end of the two horizontal slots 333. When the pull ring 312 is pulled, the connecting member 311 is driven by the tab 312 to force the two horizontal slots 333 to be broken, and the outer cover 3 is sequentially followed by two The horizontal grooving 333, the two vertical groovings 331 and the two annular opening slots 332 are sequentially opened. As shown in FIG. 32, the separation of the breaking portion 31 from the connecting portion 32 is achieved. The outer cover 3 of this embodiment Pull ring 312 for reverse time The needle direction is opened, and the opening is more convenient and quick. Of course, in other embodiments, the outer cover 3 can also be opened in the clockwise direction by the pull ring 312, which is not limited herein; in addition, in a feasible embodiment, two of the top walls of the breaking portion 31 are disposed. The length of the horizontal slit 333 may be less than or equal to the outer diameter of the outer cover 3, that is, the connecting member 311 may be located at any position on the outer cover 3, and is not limited to being disposed away from the two vertical slits 331 in the above embodiment. On the outer edge of the outer cover 3, for example, the connecting member 311 can be disposed on the outer edge of the outer cover 3 adjacent to the two vertical slots 331, at which time the length of the two horizontal slots 333 is zero, that is, The horizontal cover is not disposed on the outer cover 3. The connecting member 311 is directly connected to the two vertical slots 331. After the pull ring 312 is pulled up, the connecting member 311 sequentially follows two vertical slots 331 and two rings. The order of the open slots 332 is completed.

In still another possible embodiment of the outer cover 3 of the present invention, the outer cover 3 is a flip-type outer cover. As shown in FIGS. 19 to 21, the outer cover 3 has a broken portion 31 and a connecting portion 32, and the broken portion 31 is provided. A foldable portion 33 is formed between the connecting portion 32 and the foldable portion 33. The foldable portion 33 can be an annular groove or a discontinuous groove disposed between the broken portion 31 and the connecting portion 32. The foldable portion 33 can facilitate the breaking portion 31. The connecting portion 32 is broken and separated; the breaking portion 31 is substantially cylindrical, and a folding rib 35 is disposed on the outer wall of the breaking portion 31, and the folding rib 35 is held by one hand, and the rib is forcedly pulled toward the rib The folding rib 31 is moved in the opposite side direction to break the foldable portion 33, and the separation of the breaking portion 31 from the connecting portion 32 is achieved.

Further, as shown in FIG. 18, FIG. 20, FIG. 21 and FIG. 24, in the embodiments of the three kinds of outer covers 3, the lower surface of the connecting portion 32 of the outer cover 3 is convexly provided with the first welding in each embodiment. Two convex concentric second welding ribs 241 are protruded from the upper surface of the connecting ring 24 of the connecting cover 2, and a welding ring groove 242 is formed between the two second welding ribs 241, and the outer cover 3 is connected. The portion 32 is inserted into the welding ring groove 242 of the connecting cover 2 through the first welding rib 321 , and the sealing connection of the outer cover 3 and the connecting cover 2 is achieved by fusion welding and pressing.

Before the combined cover of the present invention is used, the outer cover 3 can function as a sealed pin valve body 1 to ensure clean and sterilized interior of the product. In use, as shown in FIGS. 4 to 6, it is necessary to separate the broken portion 31 of the outer cover 3 from the connecting portion 32, thereby exposing the valve upper cover 11 and the spool rubber plug 13 of the needle valve body 1 so that The connection to the syringe or the like is performed, and when the broken portion 31 of the outer cover 3 is separated from the connecting portion 32, the connecting portion 32 of the outer cover 3 remains on the connecting ring 24 of the connecting cover 2.

The opening manner of the outer cover 3 of the present invention is not limited to the twisted structure of FIGS. 1 to 3 and 10 to 12, and the outer cover 3 can adopt, for example, the above-described pull-ring structure of FIGS. 13 to 18 or FIG. The folding structure of FIG. 21 realizes the separation of the breaking portion 31 from the connecting portion 32. The outer cover 3 can be sealed before being used, and is easy to open during use, and is connected after being opened. The portion 32 is retained on the connecting cover 2, and various opening manners for fixing can be used.

The needle valve core of the combined cover of the present invention can realize needle-free dosing and/or needle-free drug delivery, and the purpose of piercing the rubber plug and/or the sealing film through the needle-shaped head 121 of the needle valve body 1 is simultaneously achieved. By squeezing the plug rubber plug 13 of the needle spool 1, The slit 133 on the plug rubber plug 13 is opened to establish a liquid passage. When the pressing force acting on the plug rubber plug 13 is removed, the slit slit 133 of the plug rubber plug 13 is closed to close the liquid path. The combination cover has the advantages of simple structure and convenient use, and effectively realizes the technical purpose of needle-free dosing and/or needle-free drug delivery, and avoids the repeated piercing of the rubber plug or the sealing film by the prior art needle-punching head. The rubber plug is chipped and the sealing is not strict.

In a possible embodiment of the present invention, the outer edge of the upper end of the valve core lower cover 12 is formed with a sealing convex ring 124 integrally formed at the lower end of the sealing convex ring 124, the sealing convex ring 124 and the connecting cover. 2 interference fit.

Specifically, the needle spool 1 is assembled on the inner peripheral wall of the connecting cover 2 by its sealing collar 124 when it is assembled, that is, the diameter of the sealing collar 124 is greater than the inner diameter of the connecting cover 2 Therefore, the spool lower cover 12 of the needle spool 1 can be stably disposed in the connecting cover 2.

In addition, the diameter of the sealing collar 124 needs to be larger than the inner diameter of the outer cover 3, that is, the inner diameter of the outer cover 3 is smaller than the inner diameter of the connecting cover 2, so that the design has the advantage that when the broken portion 31 of the outer cover 3 is connected After the portion 32 is separated, the connecting portion 32 remaining on the connecting ring 24 of the connecting cover 2 functions to fix the pin valve body 1, and the connecting portion 32 can abut against the sealing ring 124 to prevent the sealing ring 124 from coming out. Connect the cover 2.

In another possible embodiment of the present invention, referring to FIG. 30 and FIG. 31, and referring to FIG. 24 and FIG. 25, the outer edge of the sealing collar 124 of the spool lower cover 12 is protruded along the circumferential direction thereof. There are a plurality of bumps 1241. The inner peripheral wall of the connecting cover 2 is provided with a plurality of vertical grooves 25 along its circumferential direction. When the spool lower cover 12 is placed in the connecting cover 2, a plurality of bumps 1241 are embedded in the plurality of bumps 1241. In the vertical groove 25, the valve core lower cover 12 can be guided, so that the needle cover 1 can be fixed in the connecting cover 2 when the combined cover is used, and the rotation, tilting and the like in use cannot occur. .

Further, in the present invention, as shown in FIG. 7 to FIG. 9, the inner wall of the connecting cover 2 is provided with a locking portion 22, and the valve core lower cover 12 of the pin valve body 1 is sealingly connected to the upper portion of the connecting cover 2, The needle head 121 is located above the sealing film 21, and when the needle head 121 pierces the sealing film 21 of the connection cover 2, the sealing collar 124 is engaged at the lower end of the buckle portion 22.

Specifically, the latching portion 22 can be a snap ring protruding from the inner wall of the connecting cover 2; or the latching portion 22 is a plurality of latching lugs, and the latching lugs are spaced apart in the circumferential direction. On the inner wall of the connection cover 2.

When the needle spool 1 is pushed into the connecting cover 2 by an external force, the needle head 121 of the spool lower cover 12 of the needle spool 1 pierces the sealing film 21 in the connecting cover 2 to establish a liquid. The passage, at this time, as the needle spool 1 falls, when the sealing collar 124 of the spool lower cover 12 falls to the lower end of the latching portion 22, the latching portion 22 can abut against the sealing collar 124 to ensure the needle The valve body 1 presses the sealing film 21 to prevent the sealing ring 124 from being pressed to fix the position of the needle valve body 1 in the piercing state, so that the needle valve body 1 can be prevented from moving to cause leakage.

In an embodiment of the present invention, a rubber plug 23 may be disposed in the connecting cover 2, and the rubber plug 23 is disposed on the sealing film. The upper end of 21 is located at the lower end of the needle head 121. In use, the needle spool 1 pierces the rubber plug 23 under the action of an external force, and then pierces the sealing film 21 of the connection cover 2, which has the meaning that it can be tight with the needle spool 1 The combination forms a seal against the liquid inside the container to ensure that the liquid does not leak. Further, in the present invention, the rubber plug 23 can adopt a symmetrical design structure, for example, the rubber plug 23 can be designed as a flat cylindrical shape matching the inner diameter of the connecting cover 2, and in addition, in order to facilitate the piercing of the needle-shaped head 121 The total weight of the rubber plug 23 is reduced, and the groove can be symmetrically disposed on the upper end surface and the lower end surface of the rubber plug 23; the rubber plug 23 having the above structure is advantageous for production processing and product assembly, and does not produce product performance. influences.

In the present invention, as shown in FIGS. 24 and 25, a receiving chamber 26 for placing a rubber stopper 23 is disposed in the connecting cover 2, and the receiving chamber 26 is located above the sealing film 21, and the inner diameter of the receiving chamber 26 is smaller than the connection. The cover 2 is built into the inner diameter of the inner cavity of the valve core lower cover 12, and the accommodation chamber 26 is disposed to facilitate assembly and fixation of the rubber stopper 23.

According to an embodiment of the present invention, as shown in FIG. 10 to FIG. 12 and FIG. 26 to FIG. 29, another embodiment of the combined cover of the present invention, in this embodiment, the connecting cover 2 of the combined cover can be The utility model is replaced with a medical ship type joint 4 in the prior art, wherein the horizontal cross section of the welding surface of the lower end of the joint 4 is a diamond shape with a narrow intermediate width at both ends, and the valve core lower cover 12 of the needle valve core 1 is sealed and penetrated in the joint 4 The connecting portion 32 of the outer cover 3 is welded to the connecting ring 43 at the outer edge of the upper end of the joint 4. In a feasible embodiment, the connecting ring 43 can be provided with two concentric second welding ribs 431, two A welding ring groove 432 is formed between the two welding ribs 431 so that the first welding ribs 321 on the connecting portion 32 of the outer cover 3 are inserted and fusion-welded to achieve a sealed connection of the outer cover 3 and the joint 4. Further, a sealing film 41 and/or a rubber stopper 42 are disposed in the joint 4 to separate the chemical liquid from the needle valve core 1 to prevent contamination of the chemical liquid. In addition, a buckle portion 44 and a plurality of vertical grooves 45 may be disposed on the inner wall of the joint 4, and the receiving chamber 46 may also be disposed in the joint 4, the buckle portion 44, the vertical groove 45 and the receiving cavity 46. The structure is the same as the structure, working principle and effect of the latching portion 22, the vertical recess 25 and the receiving cavity 26 of the connecting cover 2, and details are not described herein.

The above is only one embodiment of the present invention, and it should be noted that various modifications and improvements can be made by those skilled in the art without departing from the principles of the present invention. It is within the scope of protection of the present invention.

Claims

A composite cover, wherein the combined cover comprises:

a pin valve core having a valve upper cover and a valve core lower cover connected up and down, a valve plug rubber plug between the valve core upper cover and the valve core lower cover, the valve core lower cover having a needle a head having a liquid flow path therein, the end of the needle head being provided with a plurality of liquid flow holes communicating with the liquid flow path, the valve plug having a cavity The cavity is in communication with the liquid flow channel;

a connecting cover having a sealing film disposed therein, the valve core lower cover sealingly disposed in the connecting cover, the needle head being disposed opposite to the sealing film;

The outer cover is sleeved on the outside of the upper cover of the valve core and is sealed on the connecting cover.
The composite cover according to claim 1, wherein an upper end seal of the valve core upper cover is sleeved at an upper end of the valve plug, and an upper end of the valve plug is formed with a slit cut, the slit cut Communicating with the cavity.
The composite cover of claim 2 wherein said spool lower cover has a groove in communication with said flow passage, said lower end of said spool plug being located within said groove, said spool An upper end surface of the lower cover is formed with a ring convex portion, and a lower end of the valve upper cover is sleeved outside the annular convex portion.
The composite cover according to claim 1, wherein an outer edge of an upper end of the spool lower cover is formed with a sealing collar, and the needle head is integrally formed at a lower end of the sealing collar, the sealing collar and The connecting cover has an interference fit.
The composite cover according to claim 4, wherein a plurality of protrusions are protruded from an outer peripheral wall of the sealing collar, and an inner peripheral wall of the connecting cover is provided with a plurality of vertical grooves, and the protrusion is embedded in the housing Said in the vertical groove.
The combination cover according to claim 4, wherein an inner wall of the connecting cover is provided with a hooking portion, and the sealing collar is engaged in the state in which the needle-shaped head pierces the sealing film The lower end of the buckle portion.
The combination cover according to claim 6, wherein the buckle portion is a snap ring protruding from the inner wall of the connection cover; or the buckle portion is a plurality of snap protrusions, and the plurality of The snap projections are circumferentially spaced apart from each other on the inner wall of the connecting cover.
The composite cover of claim 1 wherein the upper end of the valve core upper cover is formed with an externally threaded section.
A composite cover according to claim 1, wherein a rubber stopper is provided in said connection cover, said rubber stopper being provided at an upper end of said sealing film and at a lower end of said needle-shaped head.
The composite cover according to claim 9, wherein said connecting cover is provided above said sealing film The accommodating cavity is disposed in the accommodating cavity, and an inner diameter of the accommodating cavity is smaller than an inner diameter of the connecting cover.
The composite cover according to claim 1, wherein the outer cover has a breaking portion and a connecting portion, and an outer edge of an upper end of the connecting cover is formed with a connecting ring, and the connecting portion is welded to the connecting ring, A foldable portion is formed between the broken portion and the connecting portion.
The composite cover according to claim 11, wherein a lower end surface of the connecting portion is provided with a first welding rib, and an upper end surface of the connecting ring is provided with two second welding ribs concentric, two of the A welding ring groove is formed between the second welding ribs, and the first welding rib is inserted into the welding ring groove and is fusion welded to the welding ring groove.
The combination cover according to claim 11, wherein the foldable portion is an annular groove or a discontinuous groove provided between the break portion and the connecting portion.
The combination cover according to claim 11, wherein the upper end of the breaking portion is connected to the tab by a connecting member.
The composite cover according to claim 14, wherein the foldable portion includes two vertical slits and two annular open grooves provided on an outer side wall of the break portion, and a top wall disposed in the break portion The upper two ends of the horizontal slits are respectively connected with one ends of the two horizontal slits, and the lower ends of the two vertical slits are respectively connected with the two annular openings The slots are correspondingly connected; wherein the connecting members are located at the other ends of the two horizontal slots.
The combination cover according to claim 11, wherein the outer edge of the upper end of the breaking portion is provided with a flange.
The composite cover according to claim 11, wherein the outer wall of the breaking portion is convexly provided with two diametrically opposed pressing plates.
The composite cover of claim 4 wherein said sealing collar has a diameter greater than an inner diameter of said outer cover.
The combination cover according to claim 11, wherein an inner diameter of said connecting portion is smaller than an inner diameter of said connecting cover.
The combination closure of claim 1 wherein said attachment cap is a medical boat joint.