CN112790982B

CN112790982B - Combined cover for liquid package

Info

Publication number: CN112790982B
Application number: CN202011632612.4A
Authority: CN
Inventors: 王婧; 张丽芹; 黄勇; 杨萌萌
Original assignee: Renolit Hansen Packaging Tech Bj Ltd
Current assignee: Renolit Hansen Packaging Tech Bj Ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2023-02-28
Anticipated expiration: 2040-12-31
Also published as: CN112790982A

Abstract

The invention relates to a combined cover for liquid packaging, which comprises an outer cover body and a rubber plug, wherein the bottom of the outer cover body is connected with the liquid packaging, the top of the outer cover body is provided with a containing groove, the bottom of the containing groove is a sealing layer which is integrally injection-molded with the outer cover body, the rubber plug can be arranged in the containing groove in a sliding manner, and an initial position and a final position are formed in the containing groove; when the rubber plug is positioned at the initial position, puncturing the sealing layer corresponding to the termination position, and adding liquid into the liquid package; when the rubber plug slides from the initial position to the final position, the bottom of the rubber plug is tightly attached to the sealing layer so as to seal the puncture position on the sealing layer; the outer cover body and the sealing layer are both made of modified polyolefin materials added with elastomers. The invention solves the technical problems that the rubber plug is easy to generate scraps and has poor use convenience in the use process of the combined cover for transfusion packaging.

Description

Combined cover for liquid package

Technical Field

The invention relates to the field of medicine packaging, in particular to a combined cover for liquid packaging.

Background

In the medical and health industry, a traditional combined cover for transfusion packaging mainly comprises an outer cover, a rubber plug and an inner cover. Be equipped with easy opening portion on the enclosing cover, easy opening portion is provided with tears structure or pull ring, and the plug is located between enclosing cover and the inner cup, and the enclosing cover mainly used is fixed plug and inner cup, will easily open the portion during the use and open and make the plug expose, and then with liquid medicine injection container or with the liquid medicine in the container through the transfusion system inject into human blood into, the effect of plug is that the inner cup takes place the weeping because of being impaled by the needle tubing when preventing to inject. The inner cover is used for sealing the liquid medicine in the transfusion container and preventing the rubber plug from contacting with the liquid medicine. Besides, the infusion package is a combined cover adopting an easy-to-tear film to seal the outer cover, and the combined cover mainly structurally comprises the outer cover, the inner cover, a rubber plug and the easy-to-tear film, wherein the inner cover is nested in the outer cover, the rubber plug is clamped between the top wall of the outer cover and the top wall of the inner cover, the easy-to-tear film covers the top wall of the outer cover, the easy-to-tear film covering part is torn from the outer cover through tearing during use, the rubber plug is exposed, and then subsequent medicine adding and infusion actions are carried out.

According to the two combined covers, the sealed rubber plug is positioned between the outer cover and the inner cover of the combined cover, is an important sealing part and a guiding part under the normal condition, and utilizes the special elasticity of rubber, so that certain needle holding force can be generated to a needle when the infusion needle is used for infusion, and the problem of liquid leakage in the infusion process is reduced to a certain extent.

However, the existing combined cover for transfusion packaging has the disadvantages and shortcomings:

1. the rubber plug can be exposed in the operation process no matter the combined cover is easy to open by tearing or the combined cover is easy to tear and membrane, and the puncture needle needs to penetrate through the sealing rubber plug due to the existence of the rubber plug at the medicine injection port in the medicine adding process, so that great force is needed in the puncturing process, and inconvenience is brought to the operation of a nurse; and the puncture rubber plug is easy to generate insoluble scraps of the rubber plug, the scraps can fall into the liquid medicine along with the needle head to form foreign matters, and for the transfusion patient, the hidden danger that the transfusion needle head is blocked or tiny scraps enter the blood vessel exists.

2. In the case that the contents in the transfusion container need to be poured (such as recovery or detection), a tool is needed to be used manually to remove the rubber plug, the operation is inconvenient, the workload is increased, and the used tool can pollute the liquid in the container.

Aiming at the problems that the rubber plug is easy to generate scraps and has poor use convenience in the use process of the combined cover for infusion packaging in the related technology, an effective solution is not provided at present.

Therefore, the inventor provides the combined cover for liquid packaging by virtue of experience and practice of related industries for many years so as to overcome the defects in the prior art.

Disclosure of Invention

The invention aims to provide the combined cover for liquid packaging, in the process of adding medicine or liquid, the puncture needle can complete the filling of medicine or liquid without puncturing the rubber plug, the operation is convenient, the puncture force required by puncture is reduced, the working strength of operators is reduced, the pollution of rubber plug scraps to liquid medicine is thoroughly avoided, and the use safety is ensured.

Another object of the present invention is to provide a combined cover for liquid packaging, which is easy to assemble and disassemble, and can be used to quickly recover a rubber plug while avoiding liquid contamination, thereby greatly reducing the operation difficulty.

The purpose of the invention can be realized by adopting the following technical scheme:

the invention provides a combined cover for liquid packaging, which comprises an outer cover body and a rubber plug, wherein the bottom of the outer cover body is connected with the liquid packaging, the top of the outer cover body is provided with a containing groove, the bottom of the containing groove is a sealing layer which is integrally injection-molded with the outer cover body, the rubber plug can be arranged in the containing groove in a sliding manner, and an initial position and a final position are formed in the containing groove; when the rubber plug is positioned at the initial position, puncturing the sealing layer corresponding to the termination position, and adding liquid into the liquid package; when the rubber plug slides from the starting position to the ending position, the bottom of the rubber plug is tightly attached to the sealing layer so as to seal the puncture position on the sealing layer;

the outer cover body and the sealing layer are both made of modified polyolefin materials added with elastomers.

In a preferred embodiment of the present invention, the modified polyolefin material is prepared by adding an elastomer material to a polyolefin material for toughening and modifying;

wherein the mass ratio of the polyolefin material to the elastomer material is 8 to 9, the elastic modulus of the modified polyolefin material is 100Mpa to 300Mpa, the mold shrinkage of the modified polyolefin material is 0.2% to 1.2%, the spiral flow length of the modified polyolefin material is 300mm to 500mm, and the shore hardness D of the modified polyolefin material is 40 to 60.

In a preferred embodiment of the present invention, the top of the rubber plug is provided with an injection slot for the transfusion needle to pass through.

In a preferred embodiment of the present invention, the combined cover for liquid packaging further includes a rubber plug assembly part having an annular structure, the rubber plug assembly part is fixedly sleeved on the rubber plug, a stepped sliding platform protruding toward the inner side of the accommodating groove is formed on the inner wall of the accommodating groove, a sliding strip is disposed at the bottom of the rubber plug assembly part, and the bottom of the sliding strip is attached to the top of the sliding platform.

In a preferred embodiment of the present invention, a first positioning groove is disposed on an inner wall of the accommodating groove along a circumferential direction of the accommodating groove, a first positioning boss matched with the first positioning groove is disposed on an outer wall of the rubber plug assembly, and the first positioning boss is slidably embedded in the first positioning groove; the first positioning groove is positioned above the sliding platform.

In a preferred embodiment of the present invention, a first guiding portion and a second guiding portion are formed on an inner wall of the accommodating groove, so that the rubber plug assembly and the rubber plug are assembled in the accommodating groove, and the first guiding portion and the second guiding portion are respectively located above the first positioning groove and below the sliding platform;

the first guide part and the second guide part are slope-shaped structures which are inclined from top to bottom towards the inner side of the accommodating groove gradually.

In a preferred embodiment of the present invention, the outer wall of the rubber plug is provided with a second positioning groove along the circumferential direction of the rubber plug, the inner wall of the rubber plug assembly is provided with a second positioning boss matched with the second positioning groove along the circumferential direction of the rubber plug assembly, and the second positioning boss is fixedly embedded in the second positioning groove.

In a preferred embodiment of the present invention, a sealing film for sealing the inside of the accommodating groove is disposed on the top of the outer cover.

In a preferred embodiment of the present invention, an annular first heat sealing boss is disposed at the top of the outer cover body and located at the outer side of the accommodating groove along the circumferential direction of the outer cover body, and an edge of the sealing film is connected to the first heat sealing boss.

In a preferred embodiment of the invention, the edge of the sealing membrane is provided with at least one tear-off portion extending to the outside of the outer cover.

In a preferred embodiment of the present invention, the bottom of the outer cover is provided with a second annular heat-sealing boss along the circumferential direction of the outer cover, the bottom of the outer cover is connected to the connecting rigid tube on the liquid package, and a sealed space is formed between the second heat-sealing boss and the connecting rigid tube.

In a preferred embodiment of the present invention, the bottom of the outer cover extends out of an annular connection portion along an outer edge of the outer cover, and the second heat-sealing boss is located at the bottom of the connection portion.

In a preferred embodiment of the present invention, the sealing layer is a sheet structure, and the thickness of the sealing layer is 0.1mm to 0.5mm.

In a preferred embodiment of the present invention, the starting position and the ending position are respectively provided with a first mark portion and a second mark portion.

From the above, the combined cover for liquid packaging of the invention has the characteristics and advantages that: the top of the outer cover body is provided with the containing groove, the bottom of the containing groove is provided with the sealing layer, the rubber plug is arranged in the containing groove in a sliding manner, when the rubber plug is positioned at the initial position, the rubber plug cannot shield the sealing layer corresponding to the end position, the sealing layer corresponding to the end position can be punctured through puncturing, liquid adding or dosing operation is carried out in the liquid package, the puncturing needle does not need to puncture the rubber plug, the puncturing force required by puncturing is reduced, the working strength of an operator is reduced, the pollution of rubber plug scraps to liquid medicine is thoroughly avoided, and the use safety is ensured; when the rubber plug slides to the end position, the bottom of the rubber plug is tightly attached to the sealing layer corresponding to the end position, so that the puncture position on the sealing layer is sealed, liquid in the liquid package is prevented from leaking outwards, and the infusion needle sequentially penetrates through the rubber plug and the sealing layer during infusion. In addition, the outer cover body and the sealing layer are integrally injection-molded, and the outer cover body and the sealing layer are both made of modified polyolefin materials added with elastomers, so that the elasticity of the sealing layer is increased, the material can ensure that the sealing layer can be directly punctured for liquid adding or medicine adding, and the puncture is free of cracks and falling chips, so that the potential safety hazard brought by glue chips caused by filling liquid medicine is thoroughly avoided, and the sealing layer is suitable for popularization and use.

Drawings

The drawings are only for purposes of illustrating and explaining the present invention and are not to be construed as limiting the scope of the present invention.

Wherein:

FIG. 1: is a front sectional view of the composite cap for liquid packaging of the present invention.

FIG. 2 is a schematic diagram: is a top view of the composite cap for liquid packaging of the present invention.

FIG. 3: is the front view of the outer cap body in the combined cap for liquid packaging of the present invention.

FIG. 4: is a front cross section of the outer cover body in the combined cover for liquid packaging.

FIG. 5: is the top view of the outer cap body in the combined cap for liquid packaging of the invention.

FIG. 6: is a front cross-sectional view of the rubber plug assembly part in the combined cover for liquid packaging.

FIG. 7 is a schematic view of: is the front view of the rubber plug in the combined cover for liquid packaging of the invention.

FIG. 8: the operation process of the combined cover for liquid packaging of the present invention is schematically illustrated.

The reference numbers in the invention are:

1. an outer cover body; 101. A containing groove;

102. a sliding platform; 103. A sealing layer;

104. a first positioning groove; 105. A first heat-seal boss;

106. a connecting portion; 107. A second heat-seal boss;

108. a first guide portion; 109. A second guide portion;

2. a rubber plug; 201. Injecting into a groove;

202. a second positioning groove; 3. A rubber plug assembly part;

301. a first positioning boss; 302. A slide bar;

303. a second positioning boss; 4. A sealing film;

10. a starting position; 20. A termination position.

Detailed Description

In order to more clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will now be described with reference to the accompanying drawings.

Unless otherwise indicated, all references to up, down, top, bottom, etc. directions herein are to the same extent as the references to up, down, top, bottom, etc. directions shown in FIG. 1 of the drawings and described herein.

As shown in fig. 1 to 8, the present invention provides a combined cover for liquid packaging, the combined cover for liquid packaging comprises an outer cover body 1 and a rubber plug 2, the bottom of the outer cover body 1 is connected with a hard connecting pipe on the liquid packaging, the top of the outer cover body 1 is provided with a containing groove 101, the bottom of the containing groove 101 is a sealing layer 103 which is integrally injection-molded with the outer cover body 1, the rubber plug 2 is slidably arranged in the containing groove 101, the sliding direction of the rubber plug 2 is perpendicular to the axial direction of the outer cover body 1, and an initial position 10 and a final position 20 are formed in the containing groove 101; when the rubber plug 2 is located at the starting position 10, a worker can use the puncture needle to puncture the sealing layer 103 corresponding to the ending position 20 and add liquid (i.e. add medicine or other liquid) into the liquid package through the puncture needle; when the rubber plug 2 slides from the starting position 10 to the ending position 20, the bottom of the rubber plug 2 is tightly attached to the sealing layer 103 corresponding to the ending position 20, so that the puncture position on the sealing layer 103 is sealed through the rubber plug 2; the outer cover body 1 and the sealing layer 103 are both made of modified polyolefin materials added with elastomers.

In the use process, when the rubber plug 2 is positioned at the initial position 10, the rubber plug 2 can not shield the sealing layer 103 corresponding to the end position 20, the sealing layer 103 corresponding to the end position 20 can be punctured through puncturing, and liquid or medicine adding operation is carried out in the liquid package, so that compared with a conventional combined cover, the use of the rubber plug 2 at a medicine injection position is saved, the raw material cost is reduced, the puncturing needle does not need to puncture the rubber plug 2, the puncturing force required by puncturing is reduced, the working strength of an operator is reduced, the pollution of rubber plug scraps to liquid medicine is thoroughly avoided, and the use safety is ensured; when the plug 2 slides to the end position 20, the bottom of the plug 2 is tightly attached to the sealing layer 103 corresponding to the end position 20, so that the puncture position on the sealing layer 103 is sealed, the leakage caused by the fact that the through hole on the puncture position is not closed tightly in liquid in a liquid package which possibly exists after liquid adding or medicine adding is avoided, and the infusion needle sequentially penetrates through the plug 2 and the sealing layer 103 during infusion, so that a medicine adding opening can be sealed, the leakage and the penetration of medicines can be rapidly prevented, and the medicines are effectively prevented from being polluted. In addition, the outer cover body 1 and the sealing layer 103 are integrally injection molded, compared with the traditional combined cover in which the inner cover and the outer cover are respectively injection molded, the step of heat sealing the inner cover and the outer cover in the assembling process is omitted, and the integrally molded structure not only improves the manufacturing efficiency, but also reduces the defects of foreign matter introduction, structure deviation and the like which are easy to appear in the mounting and combining process. The outer cover body 1 and the sealing layer 103 are both made of modified polyolefin materials added with elastomers, the elasticity of the sealing layer 103 is improved, the materials can ensure that the sealing layer 103 can be directly punctured for liquid adding or medicine adding, and the puncture is free of cracks and chips, so that potential safety hazards brought by adhesive chips caused by liquid medicine filling are thoroughly avoided, and the sealing cover is suitable for popularization and use.

Furthermore, the modified polyolefin material is prepared by adding an elastomer material into a polyolefin material for toughening and modifying. Wherein the mass ratio of the polyolefin material to the elastomer material is (8-9) (namely: 80-90 parts by mass of the polyolefin material and 10-20 parts by mass of the elastomer material), the modulus of elasticity of the modified polyolefin material is 100 Mpa-300 Mpa, the mold shrinkage of the modified polyolefin material is 0.2-1.2%, the spiral flow length of the modified polyolefin material is 300-500 mm, and the Shore D hardness of the modified polyolefin material is 40-60. In the field of preparation packaging, a puncture needle for adding medicine and liquid can directly puncture the sealing layer 103 for medicine or liquid injection in the application process, so that the potential safety hazard brought by the glue scrap caused by the fact that the existing product needs to penetrate through a sealing rubber plug to inject the liquid medicine is thoroughly avoided, the puncture force is greatly reduced, and the working strength of puncture personnel is reduced.

Further, the polyolefin material may be, but is not limited to, a random copolymer polypropylene or a terpolymer polypropylene, and the elastomeric material may be, but is not limited to, a styrene-ethylene-butylene-styrene copolymer, a hydrogenated styrene-isoprene copolymer, an acetic acid-vinyl acetate copolymer, a styrene-butadiene-styrene block copolymer, and/or a hydrogenated grade styrene-butadiene-styrene triblock copolymer. Specifically, the modified polyolefin material is formed by compounding 81 parts of polyolefin material and 19 parts of elastomer material, or the modified polyolefin material is formed by compounding 90 parts of polyolefin material and 10 parts of elastomer material. The modified polyolefin material can ensure that the sealing layer 103 can be directly punctured in the puncturing process, no crack can be generated after puncturing, and no scrap falls in the sealing layer 103.

Further, as shown in fig. 1 and 4, the sealing layer 103 has a sheet-like structure, and the thickness of the sealing layer 103 is 0.1mm to 0.5mm.

Furthermore, the rubber plug 2 can be made of elastomer materials such as but not limited to butyl, polyisoprene or synthetic block isoprene, so that the rubber plug 2 has better self-closing performance, and the rubber plug 2 can hold the infusion needle tightly in the process of the infusion needle being inserted into the rubber plug 2 for infusion, thereby effectively avoiding leakage and pollution of liquid medicine.

In an alternative embodiment of the present invention, as shown in fig. 2 and 5, the receiving groove 101 is an elongated groove extending along the radial direction of the outer cover 1, and the rubber plug 2 is a cylindrical structure capable of sliding along the length direction of the receiving groove 101.

Further, the length of storage tank 101 is 1.3 times to 2 times of the radial length of plug 2 at least to for plug 2 slides in storage tank 101 and reserves sufficient space, so that plug 2 can slide on outer lid 1.

In an alternative embodiment of the present invention, as shown in fig. 1 and 7, an injection slot 201 is formed at a middle position of the top of the rubber plug 2 for an infusion needle to pass through, and during an infusion operation, the infusion needle sequentially penetrates the rubber plug 2 and the sealing layer 103 from the position of the injection slot 201.

In an alternative embodiment of the present invention, as shown in fig. 1 and 6, the combined cover for liquid packaging further includes a rubber plug assembly 3 having an annular structure, the rubber plug assembly 3 is fixedly sleeved on an outer wall of the rubber plug 2 along a circumferential direction of the rubber plug 2, a stepped sliding platform 102 protruding toward an inner side of the accommodating groove 101 is formed on an inner wall of the accommodating groove 101, a sliding strip 302 is disposed at a bottom of the rubber plug assembly 3, and a bottom of the sliding strip 302 is attached to a top of the sliding platform 102. The rubber plug 2 is slidably assembled in the accommodating groove 101 through the rubber plug assembly part 3, and the rubber plug 2 can be ensured to stably slide in the accommodating groove 101 along the sliding platform 102 through the matching of the sliding strip 302 and the sliding platform 102, so as to facilitate the operation.

Further, as shown in fig. 1 and 6, the cross section of the bottom of the sliding bar 302 is arc-shaped to reduce the friction between the sliding bar 302 and the sliding platform 102.

Further, as shown in fig. 1, 6, and 7, an annular first positioning groove 104 is formed in the inner wall of the accommodating groove 101 along the circumferential direction of the accommodating groove 101, an annular first positioning boss 301 which is matched with the first positioning groove 104 is formed in the outer wall of the rubber plug assembly 3 along the circumferential direction of the rubber plug assembly 3, and the first positioning boss 301 is slidably embedded in the first positioning groove 104; the first detent 104 is located above the sliding platform 102. Through first positioning groove 104 and first location boss 301 to the cooperation, fix a position plug 2 and plug assembly part 3 in storage tank 101, guarantee plug 2 and steadily slide in storage tank 101.

Further, as shown in fig. 1 and 6, the outer edge of the first positioning boss 301 has an arc-shaped cross section. A first guide part 108 and a second guide part 109 which are convenient for the rubber plug assembly part 3 and the rubber plug 2 to be assembled in the accommodating groove 101 are formed on the inner wall of the accommodating groove 101, the first guide part 108 is positioned above the first positioning groove 104, and the second guide part 109 is positioned below the sliding platform 102; the first guide portion 108 and the second guide portion 109 are both slope-shaped structures that gradually incline toward the inner side of the accommodating groove 101 from top to bottom. The rubber plug 2 assembled with the rubber plug assembly 3 can be vertically downwards arranged in the accommodating groove 101 through the first guide part 108 and the second guide part 109, so that the rubber plug 2 can be conveniently installed. In addition, under the circumstances such as the liquid medicine is remained in needs recovery or inspection, only need the use of the instrument will be equipped with a side edge perk gently of plug 2 of plug assembly part 3 and can separate plug 2 to the outside of enclosing body 1, realize the quick recovery of liquid medicine, convenient operation has avoided the pollution of liquid medicine. Compared with the traditional design that the rubber plug is clamped between the top wall of the outer cover and the top wall of the inner cover, the structure greatly reduces the operation difficulty, can realize the quick recovery of the liquid medicine, and simultaneously avoids the pollution of the liquid medicine (namely, contents).

Further, as shown in fig. 1, 6, and 7, an annular second positioning groove 202 is formed in the outer wall of the rubber plug 2 along the circumferential direction of the rubber plug 2, an annular second positioning boss 303 matched with the second positioning groove 202 is disposed in the inner wall of the rubber plug assembly 3 along the circumferential direction of the rubber plug assembly 3, and the second positioning boss 303 is fixedly embedded in the second positioning groove 202. The second positioning groove 202 is matched with the second positioning boss 303, so that the rubber plug assembly part 3 is stably clamped with the rubber plug 2, and the installation stability of the rubber plug 2 is improved.

Furthermore, the rubber plug assembly part 3 and the rubber plug 2 can be integrally injection-molded or respectively injection-molded and assembled when in use. In the process of processing and forming, a proper forming mode can be selected according to the difficulty of die opening and the estimation of processing cost so as to reduce the production cost.

In an alternative embodiment of the present invention, as shown in fig. 1, the top of the outer cap body 1 is provided with a sealing film 4 sealing the inside of the receiving groove 101. When not using this combined cover, accessible seal membrane 4 seals the subassembly in to storage tank 101, avoids receiving the pollution, guarantees the security of using.

Further, as shown in fig. 1 to 5, a circular first heat-sealing boss 105 is disposed on the top of the outer lid 1 at the outside of the accommodating groove 101 along the circumferential direction of the outer lid 1, and the edge of the sealing film 4 is connected to the first heat-sealing boss 105 by heat-sealing.

Further, the sealing film 4 may be made of, but not limited to, a non-PVC film, an aluminum foil, or an aluminum-plastic composite film.

Further, the edge of the sealing film 4 is provided with at least one tearing part (not shown) extending to the outer side of the outer cover body 1, so that the sealing film 4 can be conveniently opened, labor is saved, and the sealing film 4 can be uncovered only through the tearing part.

In an alternative embodiment of the present invention, as shown in fig. 1, fig. 3, and fig. 4, the bottom of the outer cap body 1 is provided with a circular second heat-sealing boss 107 along the circumference of the outer cap body 1, the bottom of the outer cap body 1 is connected to a connection hard tube on the liquid package, and the second heat-sealing boss 107 and the connection hard tube can be connected by heat sealing, so as to form a sealed space between the second heat-sealing boss 107 and the connection hard tube, prevent the liquid in the liquid package from leaking, and prevent the scraps dropped from the rubber plug 2 from falling into the liquid medicine.

Specifically, as shown in fig. 1, 3 and 4, a circular connecting portion 106 extends from the bottom of the outer lid 1 along the outer edge of the outer lid 1, and the second heat-seal boss 107 is located at the bottom of the connecting portion 106.

In an alternative embodiment of the present invention, the starting position 10 is provided with a first identification portion, the ending position 20 is provided with a second identification portion, and the first identification portion and the second identification portion are respectively marked with identifications for distinguishing the starting position 10 from the ending position 20. The medical staff can be reminded through the striking mark to slide the rubber plug 2 from the initial position 10 to the final position 20 after the dosing action is finished, and then the puncture position on the sealing layer 103 is tightly pressed so as to carry out subsequent infusion operation, and the compression depth of the sealing layer 103 is 0.1mm to 0.5mm.

The assembly process of the combined cover for liquid packaging comprises the following steps: firstly, the rubber plug assembly part 3 and the rubber plug 2 are assembled, then the assembly part of the rubber plug assembly part 3 and the rubber plug 2 is vertically pressed into the containing groove 101 on the outer cover body 1 according to the downward direction of the sliding strip 302, the assembly part of the rubber plug assembly part 3 and the rubber plug 2 gradually moves downwards under the guiding action of the first guiding part 108 and the second guiding part 109 in sequence, the second heat-sealing boss 107 at the bottom of the outer cover body 1 is connected with a connecting hard tube on a liquid package in a heat-sealing mode, so that a stable closed space is formed, and the bottom surface of the sealing layer 103 can be directly contacted with liquid medicine in the liquid package. The first heat-seal land 105 on the top of the outer cap 1 is heat-sealed to the sealing film 4 to provide a secondary sealing effect.

The use process of the combined cover for liquid packaging comprises the following steps: first, the sealing membrane 4 is torn from the outer cap 1 by a tearing action, so that the rubber plug 2 and the rubber plug assembly 3 are exposed to the medical staff. In an initial state, the rubber plug 2 is located at the initial position 10, the rubber plug 2 cannot shield the sealing layer 103 corresponding to the termination position 20, and at the moment, a medical worker can puncture the sealing layer 103 corresponding to the termination position 20 through puncture and add liquid or medicine into the liquid package; after the liquid adding or medicine adding operation is completed, the medical staff can slide the rubber plug 2 from the initial position 10 to the end position 20, so that the bottom of the rubber plug 2 is tightly attached to the sealing layer 103 corresponding to the end position 20, and the puncture position on the sealing layer 103 is sealed. When infusion to a patient is needed, the medical staff can directly penetrate the rubber plug 2 and the sealing layer 103 corresponding to the end position 20 by using an infusion needle without sliding the rubber plug 2 again, and then the patient can be infused.

The combined cover for liquid packaging has the characteristics and advantages that:

1. this combined cover for liquid packaging punctures to sealing layer 103 through the puncture, can accomplish the liquid feeding or add the medicine operation, and this process need not to pierce through plug 2, has reduced raw and other materials cost, has reduced the required puncture force of puncture, has reduced operating personnel's working strength, has thoroughly avoided the pollution of plug piece to the liquid medicine, guarantees the security of using.

2. This combined cover for liquid packaging can slide plug 2 to puncture position on the sealing layer 103 seals, has avoided the liquid in the liquid packaging that probably exists after the liquid feeding or add the medicine because the through-hole closure on the puncture position is not tight and the seepage that leads to, during the infusion needle pass plug 2 and sealing layer 103 in proper order can, not only can seal the mouth that adds medicine, can prevent leakage and the infiltration of medicine again fast, prevent effectively that the medicine from being contaminated.

3. Compared with the traditional combined cover, the combined cover for liquid packaging omits the step of heat sealing of the inner cover and the outer cover in the assembling process, and the integrated forming structure not only improves the manufacturing efficiency, but also reduces the defects of foreign matter introduction, structural deviation and the like which are easy to appear in the installation and combination process.

4. In the combined cover for liquid packaging, the outer cover body 1 and the sealing layer 103 are both made of modified polyolefin materials added with elastomers, so that the elasticity of the sealing layer 103 is increased, the materials can ensure that the sealing layer 103 can be directly punctured for liquid adding or medicine adding, and the puncture is free from cracks and falling chips, so that the potential safety hazard brought by glue chips caused by liquid medicine filling is thoroughly avoided, and the combined cover is suitable for popularization and use.

The above description is only an exemplary embodiment of the present invention, and is not intended to limit the scope of the present invention. Any equivalent changes and modifications that can be made by one skilled in the art without departing from the spirit and principles of the invention should fall within the protection scope of the invention.

Claims

1. The combined cover for liquid packaging is characterized by comprising an outer cover body (1) and a rubber plug (2), wherein the bottom of the outer cover body (1) is connected with liquid packaging, a containing groove (101) is formed in the top of the outer cover body (1), a sealing layer (103) which is integrally formed with the outer cover body (1) is arranged at the bottom of the containing groove (101), the rubber plug (2) can be slidably arranged in the containing groove (101), and an initial position (10) and an end position (20) are formed in the containing groove (101); when the rubber plug (2) is positioned at the initial position (10), puncturing a sealing layer (103) corresponding to the termination position (20), and adding liquid into the liquid package; when the rubber plug (2) slides from the starting position (10) to the ending position (20), the bottom of the rubber plug (2) is tightly attached to the sealing layer (103) so as to seal a puncture position on the sealing layer (103);

the combined cover for liquid packaging further comprises a rubber plug assembly part (3) of an annular structure, the rubber plug assembly part (3) is fixedly sleeved on the rubber plug (2), a first guide part (108) and a second guide part (109) which are convenient for the rubber plug assembly part (3) and the rubber plug (2) to be assembled in the accommodating groove (101) are formed on the inner wall of the accommodating groove (101), and the first guide part (108) is located above the second guide part (109); the first guide part (108) and the second guide part (109) are both slope-shaped structures which are gradually inclined towards the inner side of the accommodating groove (101) from top to bottom;

the outer cover body (1) and the sealing layer (103) are both made of modified polyolefin materials added with elastomers.

2. The composite cover for liquid packaging as claimed in claim 1, wherein said modified polyolefin material is prepared by adding an elastomer material to a polyolefin material for toughening and modifying;

3. The combined cover for liquid packaging according to claim 1, wherein the top of the rubber plug (2) is provided with an injection slot (201) for the infusion needle to pass through.

4. The combined cover for liquid packaging according to claim 1, wherein a stepped sliding platform (102) protruding to the inner side of the container (101) is formed on the inner wall of the container (101), a sliding strip (302) is provided at the bottom of the rubber plug assembly (3), and the bottom of the sliding strip (302) is attached to the top of the sliding platform (102).

5. The combined cover for liquid packaging according to claim 4, wherein a first positioning groove (104) is formed in the inner wall of the containing groove (101) along the circumferential direction of the containing groove (101), a first positioning boss (301) matched with the first positioning groove (104) is arranged on the outer wall of the rubber plug assembly part (3), and the first positioning boss (301) is slidably embedded in the first positioning groove (104); the first positioning groove (104) is positioned above the sliding platform (102).

6. The combined cover for liquid packaging according to claim 4, wherein a second positioning groove (202) is formed in the outer wall of the rubber plug (2) along the circumferential direction of the rubber plug (2), a second positioning boss (303) matched with the second positioning groove (202) is arranged in the inner wall of the rubber plug assembly part (3) along the circumferential direction of the rubber plug assembly part (3), and the second positioning boss (303) is fixedly embedded in the second positioning groove (202).

7. The composite cover for liquid packaging as claimed in claim 1, wherein a sealing film (4) for sealing the inside of said container (101) is provided on the top of said outer cover body (1).

8. The combined cover for liquid packaging according to claim 7, wherein the top of the outer cover body (1) is provided with a first heat-seal land (105) having an annular shape along the circumferential direction of the outer cover body (1) at the outside of the container groove (101), and the edge of the sealing film (4) is connected to the first heat-seal land (105).

9. Combined lid for liquid packaging according to claim 8, characterized in that the edge of the sealing film (4) is provided with at least one tear-off portion extending to the outside of the outer lid body (1).

10. The combined cover for liquid packaging according to claim 1, wherein the bottom of the outer cover body (1) is provided with a second heat-seal projection (107) having an annular shape along the circumferential direction of the outer cover body (1), the bottom of the outer cover body (1) is connected to a connecting rigid tube on the liquid packaging, and a sealed space is formed between the second heat-seal projection (107) and the connecting rigid tube.

11. The combined cover for liquid packaging as claimed in claim 10, wherein the bottom of said outer cover body (1) extends out of an annular connecting portion (106) along the outer edge of said outer cover body (1), and said second heat-seal projection (107) is located at the bottom of said connecting portion (106).

12. The composite cover for liquid packaging according to claim 1, wherein said sealing layer (103) has a sheet-like structure, and the thickness of said sealing layer (103) is 0.1mm to 0.5mm.

13. Combined closure for liquid packaging according to claim 1, characterized in that said starting position (10) and said end position (20) are provided with a first marking and a second marking, respectively.