CN219783194U - Through hole integral type outer covering film joint and infusion bag - Google Patents

Abstract

The utility model discloses a through hole integral type outer tectorial membrane connector, which comprises a connector seat and a first connector pipe connected with the connector seat, wherein the first connector pipe comprises a first communication cavity for communicating an inner cavity of an infusion bag and a puncture end part communicated with the first communication cavity and arranged far away from the connector seat, and the puncture end part comprises: the puncture shell is circumferentially enclosed on the inner side wall of the puncture shell to form a filling cavity; a first external sealing film welded and attached to the upper end surface of the puncture housing for sealing the upper end opening of the filling cavity; the inner plug is in adhesive compatible connection with the inner side wall of the puncture shell and is used for being filled into the filling cavity through an injection molding process, the upper end face of the inner plug is parallel to the end face of the puncture shell or lower than the upper end face of the puncture shell, and the filling cavity is communicated with the first communication cavity so that the first communication cavity is directly communicated with the inner plug. In addition, the utility model also discloses an infusion bag comprising the through hole integral type outer covering film joint.

Description

Through hole integral type outer covering film joint and infusion bag

Technical Field

The utility model relates to the technical field of infusion connectors, in particular to a through hole integral type outer covering film connector. In addition, the utility model also relates to an infusion bag comprising the through hole integral type outer covering film joint.

Background

The infusion bag is a medical article widely applied to the medical industry and is mainly used for infusion treatment of patients, an infusion connector is arranged on the infusion bag so as to conduct puncture guiding and sealing after puncture on the infusion needle, the infusion connector is usually composed of a connector seat and a connector tube, the connector seat is welded at an opening of the infusion bag, then the connector tube conducts puncture guiding and sealing, the infusion bag is usually used in a reverse hanging mode so as to realize natural infusion of liquid medicine by utilizing gravity, therefore, an inner plug is arranged in the connector tube so as to tightly hold the inner plug after the inner plug is punctured by the infusion needle to realize sealing after the infusion needle punctures infusion, and the patient always pulls out the infusion needle in the infusion process under the condition that the liquid medicine still remains in the infusion bag, at the moment, a puncture hole on the inner plug is closed under the elastic action so as to realize sealing after the infusion needle is pulled out, and leakage is prevented, namely the fixing sealing of the inner plug in the connector seat is very critical, the reliable sealing of the inner plug before puncture is required to be ensured.

The joint tube on the existing infusion joint is usually assembled by an inner tube body, an inner plug and an outer cover body, and the inner tube body, the inner plug and the outer cover body are respectively and independently manufactured so as to be mutually connected by the inner tube body and the outer cover body to form a cavity for fixing and sealing the inner plug after the manufacture is finished, but the following problems exist in the mode of fixing and sealing the inner plug: 1. the inner pipe body, the inner plug and the outer cover body are all required to be manufactured independently, and the inner pipe body, the inner plug and the outer cover body are also required to be assembled after the manufacturing is completed, so that the process steps are numerous and complex, and the production efficiency is low; 2. the sealing of the inner plug mainly depends on the assembly of the inner pipe body and the outer pipe body, and the sealing requirement of the inner plug is high based on the specificity of a medical product, so that the assembly precision requirement between the inner pipe body and the outer pipe body is high, and the injection molding processing difficulty is high; 3. when infusion treatment is carried out, the inner plug is not carried into the infusion bag when the infusion needle is punctured, and the inner plug is not carried out of the joint pipe when the infusion needle is pulled out, so that the corresponding structure for fixing the inner plug has high strength requirement, high strength requirement of injection molding raw materials, limited applicable material range and high raw material cost; 4. often set up integrated into one piece's interior sealing part on the interior body to prevent interior stopper and liquid medicine contact, but interior sealing part often can hinder the puncture of infusion needle, increases cutting resistance, and the puncture degree of difficulty is big, and then has increased the probability of cutting the bits that fall, brings unnecessary risk, and along with technological development progress, the interior stopper of some materials can already be contacted with liquid medicine, for example medicinal butyl plug and tectorial membrane plug, but does not have the infusion joint of structure looks adaptation.

Disclosure of Invention

The utility model provides a through hole integral type outer tectorial membrane connector and an infusion bag, which are used for solving the technical problems of high assembly precision requirement, high injection molding processing difficulty, high production cost and high puncture difficulty of the infusion connector on the existing infusion bag.

According to one aspect of the present utility model, there is provided a through-hole integral type outer film-covering joint comprising a joint base and a first joint tube connected with the joint base, the first joint tube comprising a first communication cavity for communicating with an inner cavity of an infusion bag and a piercing end portion communicating with the first communication cavity and disposed away from the joint base, the piercing end portion comprising: the puncture shell is circumferentially enclosed on the inner side wall of the puncture shell to form a filling cavity; a first external sealing film welded and attached to the upper end surface of the puncture housing for sealing the upper end opening of the filling cavity; the inner plug is in adhesive compatible connection with the inner side wall of the puncture shell and is used for being filled into the filling cavity through an injection molding process, the upper end face of the inner plug is parallel to the end face of the puncture shell or lower than the upper end face of the puncture shell, and the filling cavity is communicated with the first communication cavity so that the first communication cavity is directly communicated with the inner plug.

As a further improvement of the above technical scheme:

further, the thickness of the inner plug is 5mm-6mm.

Further, the inner diameter of the filling cavity is smaller than the inner diameter of the first communicating cavity.

Further, the upper end face of the inner plug is provided with a puncture groove formed by concave.

Further, the first connector tube includes two piercing end portions arranged at intervals along a radial direction of the first connector tube and communicated with the same first communication cavity.

Further, the joint comprises two first joint pipes which are arranged at intervals along the length direction of the joint seat and are all arranged on the same joint seat.

Further, the first connector tube further comprises a first guide end portion, the puncture end portion and the first guide end portion are arranged at intervals along the radial direction of the first connector tube and are communicated with the same first communication cavity, the first guide end portion comprises a first guide cavity, a first inner sealing portion and a second outer sealing film, the first guide cavity is formed by encircling the inner side wall of the first guide shell and is used for being in sealing connection with an infusion needle, the first inner sealing portion is integrally formed with the lower end portion of the first guide shell and is used for sealing the lower end opening of the first guide cavity, and the second outer sealing film is welded and attached to the upper end face of the first guide end portion and is used for sealing the upper end opening of the first guide cavity.

Further, the connector comprises a second connector tube, the first connector tube and the second connector tube are distributed at intervals along the length direction of the connector seat and are all installed on the same connector seat, the second connector tube comprises a second communicating cavity for communicating an inner cavity of an infusion bag and a second guiding end part arranged far away from the connector seat, the second guiding end part comprises a second guiding shell, a second guiding cavity formed by surrounding the inner side wall of the second guiding shell and used for being in sealing connection with an infusion needle, a second inner sealing part integrally formed with the lower end part of the second guiding shell and used for sealing a lower end opening of the second guiding cavity, and a third outer sealing film welded and attached to the upper end face of the second guiding end part and used for sealing the upper end opening of the second guiding cavity.

Further, the joint comprises a third joint pipe, the first joint pipe and the third joint pipe are distributed at intervals along the length direction of the joint seat and are all installed on the same joint seat, and the third joint pipe comprises a third communication cavity used for communicating an inner cavity of the infusion bag, a connecting platform used for connecting the outer cover body and a conical opening formed by encircling the inner side wall of the connecting platform and communicated with the third communication cavity and used for communicating the inner cavity of the outer cover body.

According to another aspect of the present utility model, there is also provided an infusion bag including the through-hole integral type outer film joint described above.

The utility model has the following beneficial effects:

the through hole integral type outer tectorial membrane joint of the utility model obtains the joint seat through adopting injection molding technology, the first joint pipe is molded together in the injection molding process of the joint seat, or is welded and fixed with the joint seat after being singly molded, the first joint pipe is communicated with the inner cavity of the infusion bag through the first communication cavity, the puncture end part is used for puncture guiding the infusion needle to realize the infusion of liquid medicine, the puncture shell and the filling cavity are formed in the injection molding process of the puncture end part, then the filling cavity is filled by adopting injection molding technology to form an inner plug, the sealing after the puncture of the infusion needle is realized through the inner plug, the outer surface matrix of the inner plug is tightly adhered with the inner side wall matrix of the puncture shell, the structural stability is good, the reliability is high, simultaneously, the filling cavity is communicated with the first communication cavity, the first communication cavity is directly communicated with the inner plug, the infusion needle can perform the infusion of the liquid medicine after puncturing the inner plug, the puncture difficulty of puncture is greatly reduced, finally, a welding process is adopted to weld a first external sealing film on the upper end face of the puncture shell so as to seal the upper end opening of the filling cavity, the inner plug is prevented from contacting with the external environment before the infusion needle punctures, the upper end face of the inner plug is flush with the upper end face of the puncture shell or lower than the upper end face of the puncture shell, the horizontal sealing of the first external sealing film is ensured, the sealing performance is improved, the through hole integral type outer film joint in the scheme is firstly adopted to obtain a first joint pipe by injection molding, and then the injection molding filling is adopted to obtain the double-material injection molding process of the inner plug, so that the inner plug is reliably fixed, and then the film sealing is realized by adopting the welding process, compared with the prior art, the process steps are simple and clear, the production efficiency is improved, the assembly is not needed, the injection molding processing difficulty is low, the inner plug and the puncture shell are fixedly connected by the bonding compatibility of a raw material matrix, the strength requirement on injection molding raw materials is low, the injection molding device has the advantages that the selection range of injection molding raw materials is enlarged, one of the injection molding raw materials with relatively low price can be selected, so that the raw material cost is reduced, meanwhile, the inner sealing part is not required to be sealed, the inner structure is simplified, the materials are saved, the manufacturing cost is reduced, the inner plug can be selected as a medicinal butyl rubber plug or a film-covered rubber plug, the infusion needle only needs to pierce the inner plug, the piercing difficulty is greatly reduced, the use by medical staff is facilitated, the practicability is high, and the injection molding device is suitable for wide popularization and application.

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

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

FIG. 1 is a schematic view of the structure of a through-hole integral type outer film joint of embodiment 1 of the present utility model;

FIG. 2 is a cross-sectional view of a through-hole integral type outer film joint of embodiment 1 of the present utility model;

FIG. 3 is a schematic view of the structure of a through-hole integral type outer film joint of embodiment 2 of the present utility model;

FIG. 4 is a cross-sectional view of a through-hole integral type outer film joint of embodiment 2 of the present utility model;

FIG. 5 is a schematic view of the structure of a through-hole integral type outer film joint of embodiment 3 of the present utility model;

FIG. 6 is a cross-sectional view of a through-hole integral type outer film joint of embodiment 3 of the present utility model;

FIG. 7 is a schematic view of the structure of a through-hole integral type outer film joint of embodiment 4 of the present utility model;

FIG. 8 is a cross-sectional view of a through-hole integral type outer film joint of example 4 of the present utility model;

FIG. 9 is a schematic view showing the structure of a through-hole integral type outer coating joint according to embodiment 5 of the present utility model;

FIG. 10 is a cross-sectional view of a through-hole integral type outer film joint of example 5 of the present utility model;

FIG. 11 is a schematic view showing the structure of a through-hole integral type outer coating joint according to embodiment 6 of the present utility model;

fig. 12 is a cross-sectional view of a through-hole integral type outer coating joint of embodiment 6 of the present utility model.

Legend description:

100. a joint seat; 200. a first joint pipe; 210. a first communication chamber; 220. a piercing end; 221. a puncture housing; 222. filling the cavity; 223. a first outer sealing film; 224. an inner plug; 230. a first guide end; 231. a first guide housing; 232. a first guide chamber; 233. a first inner seal; 234. a second outer sealing film; 300. a second joint pipe; 310. a second communication chamber; 320. a second guide end; 321. a second guide housing; 322. a second guide chamber; 323. a second inner seal; 324. a third outer sealing film; 400. a third joint pipe; 410. a third communication chamber; 420. a connecting platform; 430. a conical mouth.

Detailed Description

Embodiments of the utility model are described in detail below with reference to the attached drawing figures, but the utility model can be practiced in a number of different ways, as defined and covered below.

FIG. 1 is a schematic view of the structure of a through-hole integral type outer film joint of embodiment 1 of the present utility model; FIG. 2 is a cross-sectional view of a through-hole integral type outer film joint of embodiment 1 of the present utility model; FIG. 3 is a schematic view of the structure of a through-hole integral type outer film joint of embodiment 2 of the present utility model; FIG. 4 is a cross-sectional view of a through-hole integral type outer film joint of embodiment 2 of the present utility model; FIG. 5 is a schematic view of the structure of a through-hole integral type outer film joint of embodiment 3 of the present utility model; FIG. 6 is a cross-sectional view of a through-hole integral type outer film joint of embodiment 3 of the present utility model; FIG. 7 is a schematic view of the structure of a through-hole integral type outer film joint of embodiment 4 of the present utility model; FIG. 8 is a cross-sectional view of a through-hole integral type outer film joint of example 4 of the present utility model; FIG. 9 is a schematic view showing the structure of a through-hole integral type outer coating joint according to embodiment 5 of the present utility model; FIG. 10 is a cross-sectional view of a through-hole integral type outer film joint of example 5 of the present utility model; FIG. 11 is a schematic view showing the structure of a through-hole integral type outer coating joint according to embodiment 6 of the present utility model; fig. 12 is a cross-sectional view of a through-hole integral type outer coating joint of embodiment 6 of the present utility model.

Example 1

As shown in fig. 1 and 2, the through-hole integral type outer film-covered joint of the present embodiment includes a joint base 100 and a first joint tube 200 connected with the joint base 100, the first joint tube 200 includes a first communication cavity 210 for communicating with an inner cavity of an infusion bag and a piercing end 220 communicating with the first communication cavity 210 and disposed away from the joint base 100, the piercing end 220 includes: the puncture housing 221, the inner side wall of the puncture housing 221 is circumferentially enclosed to form a filling cavity 222; a first external sealing film 223 welded to an upper end surface of the puncture housing 221 for sealing an upper end opening of the filling chamber 222; the inner plug 224 is in adhesive compatible connection with the inner sidewall of the puncture housing 221, and is used for being filled into the filling cavity 222 through an injection molding process, the upper end surface of the inner plug 224 is parallel to the end surface of the puncture housing 221 or lower than the upper end surface of the puncture housing 221, and the filling cavity 222 is communicated with the first communication cavity 210, so that the first communication cavity 210 is directly communicated with the inner plug 224. Specifically, the through hole integral type outer tectorial membrane joint of the utility model obtains the joint seat 100 through injection molding by adopting an injection molding process, the first joint pipe 200 is molded together in the injection molding process of the joint seat 100, or is welded and fixed with the joint seat 100 after being singly molded, the first joint pipe 200 is communicated with the inner cavity of an infusion bag through the first communication cavity 210, the infusion needle is subjected to puncture guiding through the puncture end part 220 so as to realize liquid medicine infusion, the puncture shell 221 and the filling cavity 222 are formed in the injection molding process of the puncture end part 220, then the filling cavity 222 is filled by adopting the injection molding process so as to form the inner plug 224, the sealing after the puncture of the infusion needle is realized through the inner plug 224, the outer surface matrix of the inner plug 224 is tightly adhered with the inner side wall matrix of the puncture shell 221, the structure stability is good, the reliability is high, the filling cavity 222 is communicated with the first communication cavity 210 is directly communicated to the inner plug 224, the infusion needle punctures the inner plug 224 to infuse the liquid medicine, greatly reduce the puncture difficulty, finally, the welding process is adopted to weld the first outer sealing film 223 on the upper end face of the puncture shell 221, so as to seal the upper end opening of the filling cavity 222, prevent the inner plug 224 from contacting with the external environment before the infusion needle punctures, the upper end face of the inner plug 224 is flush with the upper end face of the puncture shell 221 or lower than the upper end face of the puncture shell 221, ensure the horizontal sealing of the first outer sealing film 223, improve the sealing performance, the through hole integral outer film joint of the scheme firstly adopts injection molding to obtain the first joint pipe 200, then adopts the double-material injection molding process of the inner plug 224 to realize the fixation of the inner plug 224 reliably, and then adopts the welding process to realize film sealing, compared with the prior art, the process steps are simple and clear, the production efficiency is improved, no assembly is needed, the injection molding processing difficulty is low, the inner plug 224 and the puncture shell 221 are fixedly connected through the raw material matrix adhesion compatibility, the strength requirement on injection molding raw materials is low, the selection range of the injection molding raw materials is enlarged, one with relatively low price can be selected from various injection molding raw materials, so that the raw material cost is reduced, meanwhile, the inner sealing part is not required to be sealed, the inner structure is simplified, the materials are saved, the manufacturing cost is reduced, the inner plug 224 can select a medicinal butyl rubber plug or a film rubber plug, the infusion needle only needs to puncture the inner plug 224, the puncture difficulty is greatly reduced, the use by medical staff is facilitated, the practicability is strong, and the injection needle is suitable for wide popularization and application. It should be understood that the two-part injection molding process and the welding process are well known to those skilled in the art, and are not repeated here.

In this embodiment, the thickness of the inner plug 224 is 5mm-6mm. It should be appreciated that since the inner plug 224 is injection molded, whether or not the connection is reliable depends mainly on the area of adhesion between the outer wall surface of the inner plug 224 and the inner wall surface of the puncture housing 221, the greater the area of adhesion, the higher the reliability, and conversely, the smaller the area of adhesion, the lower the reliability, and in the case of a certain inner diameter, the greater the thickness of the inner plug 224, the greater the area of adhesion. Specifically, when the thickness of the inner plug 224 is between 5mm and 6mm, the puncture difficulty is proper, and the inner plug 224 is reliably fixed; when the thickness of the inner plug 224 is less than 5mm, the bonding area between the inner plug 224 and the puncture housing 221 is too small, the reliability is low, and the inner plug is easy to separate in the process of puncturing the infusion needle; when the thickness of the inner plug 224 is larger than 6mm, the puncture difficulty is too large, the cutting resistance is too large, and the use of medical staff is inconvenient. Preferably, the thickness of inner plug 224 is 5.4mm, and the overall performance is best when the thickness of inner plug 224 is 5.4 mm.

In this embodiment, the inner diameter of the filling chamber 222 is smaller than the inner diameter of the first communicating chamber 210. Specifically, the inner diameter of the filling cavity 222 is smaller than that of the first communicating cavity 210, so that the lower end surface of the puncture housing 221 extends radially inwards to form a step surface, the assembly of the mold in the injection molding process of the inner plug 224 is facilitated, and the difficulty of injection molding is reduced. Preferably, the inner diameter of the filling chamber 222 is 10mm and the inner diameter of the first communication chamber 210 is 10.5mm.

In this embodiment, the upper end surface of the inner plug 224 is provided with a penetration groove formed by concave. Specifically, the puncture thickness of the infusion needle when puncturing the injection molding inner plug 224 is reduced through the puncture groove, so that the puncture difficulty is reduced, and the cutting resistance is reduced.

Example 2

As shown in fig. 3 and 4, this embodiment differs from embodiment 1 in that: the first connector tube 200 includes two piercing end portions 220, and the two piercing end portions 220 are arranged at intervals in the radial direction of the first connector tube 200 and communicate with the same first communication chamber 210. Specifically, the two puncture ends 220 are used for respectively dispensing and transfusion, so that pollution risks caused by repeated puncture of one inner plug 224 when one puncture end 220 is used for dispensing and transfusion are avoided. Optionally, the inner diameters of the filling cavities 222 in the two piercing end portions 220 are different, so that the formed inner plugs 224 are different in radius, the small inner plug 224 in the piercing end portion 220 is used for dispensing medicine, the large inner plug 224 in the piercing end portion 220 is used for transfusion, and the medical staff can conveniently distinguish the two inner plugs 224. Optionally, the inner plugs 224 in the two piercing end portions 220 are each of a different color for ease of use by the healthcare worker. Alternatively, the first connector tube 200 is injection molded from a transparent material to facilitate direct viewing of the size or color of the inner plug 224 by a medical professional. Alternatively, the first external sealing films 223 and the piercing end 220 are arranged in a one-to-one correspondence, the two first external sealing films 223 are separating films, or the two first external sealing films 223 are integrated films, and frangible marks are arranged between the two films. Preferably, the inner diameter of the large inner plug 224 is 10mm and the inner diameter of the small inner plug 224 is 7mm.

Example 3

As shown in fig. 5 and 6, this embodiment differs from embodiment 1 in that: the joint comprises two first joint pipes 200, and the two first joint pipes 200 are arranged at intervals along the length direction of the joint seat 100 and are all installed on the same joint seat 100. Specifically, the two first joint pipes 200 are used for respectively dispensing and transfusion, so that pollution risks caused by repeated puncture of one inner plug 224 when one first joint pipe 200 is used for dispensing and transfusion are avoided. Optionally, the inner diameters of the filling cavities 222 in the two piercing end portions 220 are different, so that the radius of the inner plugs 224 are different, the small inner plug 224 in the piercing end portion 220 is used for dispensing medicine, the large inner plug 224 in the piercing end portion 220 is used for transfusion, and the medical staff can conveniently distinguish the use by the two inner plugs 224. Optionally, the inner plugs 224 in the two piercing end portions 220 are each of a different color for ease of use by the healthcare worker. Alternatively, the first connector tube 200 is injection molded from a transparent material to facilitate direct viewing of the size or color of the inner plug 224 by a medical professional. Alternatively, the first external sealing films 223 and the piercing end 220 are arranged in a one-to-one correspondence, the two first external sealing films 223 are separating films, or the two first external sealing films 223 are integrated films, and frangible marks are arranged between the two films. Preferably, the inner diameter of the large inner plug 224 is 10mm and the inner diameter of the small inner plug 224 is 7mm.

Example 4

As shown in fig. 7 and 8, this embodiment differs from embodiment 1 in that: the first coupling tube 200 further includes a first guide end portion 230, the piercing end portion 220 and the first guide end portion 230 being arranged at intervals in a radial direction of the first coupling tube 200 and communicating with the same first communicating chamber 210, the first guide end portion 230 including a first guide chamber 232 formed by enclosing an inner side wall of the first guide housing 231 for sealing connection with an infusion needle, a first inner sealing portion 233 integrally formed with a lower end portion of the first guide housing 231 for sealing a lower end opening of the first guide chamber 232, and a second outer sealing film 234 welded to an upper end surface of the first guide end portion 230 for sealing an upper end opening of the first guide chamber 232. Specifically, the puncturing end 220 is used for dispensing, the first guiding end 230 is used for transfusion, the first guiding cavity 232 realizes puncturing guiding to the transfusion needle, the inner diameter of the first guiding cavity 232 is in interference fit with the outer diameter of the transfusion needle so as to realize sealing after puncturing, the upper end opening of the first guiding cavity 232 is sealed through the second outer sealing film 234 so as to prevent the first guiding cavity 232 from being polluted by the external environment, the bottom of the first guiding cavity 232 is sealed through the first inner sealing part 233, liquid medicine is prevented from leaking after entering the first guiding cavity 232, and the first inner sealing part 233 and the first guiding shell 231 are molded together in the injection molding process, so that the structure stability is good and the reliability is high. It should be appreciated that the inner plug 224 is a critical component affecting the tightness of the connector, which is often relatively expensive, but the present solution provides for a post-lancing seal through the first guide cavity 232 in interference fit with the infusion needle to provide for a post-lancing seal without the use of the inner plug 224, simplifying manufacturing process steps and greatly reducing the manufacturing cost of the connector. Alternatively, the first outer sealing film 223 and the second outer sealing film 234 are separate films, or the first outer sealing film 223 and the second outer sealing film 234 are an integral film with a frangible mark therebetween.

In this embodiment, the thickness of the first inner sealing portion 233 is 0.2mm to 0.4mm. Specifically, when the thickness of the first inner sealing portion 233 is between 0.20mm and 0.40mm, the strength of the first inner sealing portion 233 is appropriate, the puncture difficulty is low, and the first inner sealing portion 233 is not easy to break when being punctured, so that insoluble particles fall into the liquid medicine; when the thickness of the first inner sealing part 233 is less than 0.20mm, it is easy to burn through during injection molding, and it cannot be used, and the strength is too low, and it is easy to break when it is punctured, so that insoluble particles fall into the liquid medicine; when the thickness of the first inner sealing portion 233 is greater than 0.40mm, the strength of the first inner sealing portion 233 is too high, a large cutting resistance is generated in the puncturing process, puncturing difficulty is too high, and meanwhile the probability of generating insoluble particles is increased. Preferably, the thickness of the first inner sealing part 233 is 0.30mm, and the overall performance is optimal when the thickness of the first inner sealing part 233 is 0.30 mm.

Example 5

As shown in fig. 9 and 10, this embodiment differs from embodiment 1 in that: the joint comprises a second joint pipe 300, the first joint pipe 200 and the second joint pipe 300 are arranged at intervals along the length direction of the joint seat 100 and are all installed on the same joint seat 100, the second joint pipe 300 comprises a second communication cavity 310 used for communicating an inner cavity of an infusion bag and a second guide end part 320 arranged far away from the joint seat 100, the second guide end part 320 comprises a second guide shell 321, a second guide cavity 322 formed by surrounding the inner side wall of the second guide shell 321 and used for being in sealing connection with an infusion needle, a second inner sealing part 323 integrally formed with the lower end part of the second guide shell 321 and used for sealing the lower end opening of the second guide cavity 322, and a third outer sealing film 324 welded and attached to the upper end surface of the second guide end part 320 and used for sealing the upper end opening of the second guide cavity 322. Specifically, the first connector tube 200 is used for dispensing, the second connector tube 300 is used for transfusion, the second communication cavity 310 is used for realizing liquid medicine transfusion, the second guide cavity 322 is used for realizing puncture guide to the transfusion needle, the inner diameter of the second guide cavity 322 is in interference fit with the outer diameter of the transfusion needle so as to realize seal after puncture, the upper end opening of the second guide cavity 322 is sealed through the third outer sealing film 324 so as to prevent the second guide cavity 322 from being polluted by the external environment, the bottom of the second guide cavity 322 is sealed through the second inner sealing part 323, the liquid medicine is prevented from entering the second guide cavity 322 to leak, the second inner sealing part 323 and the second guide shell 321 are molded together in the injection molding process, and the structure stability is good and the reliability is high. It should be appreciated that the inner plug 224 is a critical component affecting the tightness of the connector, which is often relatively expensive, but the present solution provides for a post-lancing seal through the second guide lumen 322 in interference fit with the infusion needle, thereby simplifying manufacturing process steps and greatly reducing the manufacturing cost of the connector, without the use of the inner plug 224. Alternatively, the first outer sealing film 223 and the third outer sealing film 324 are separate films, or the first outer sealing film 223 and the third outer sealing film 324 are an integral film with a frangible mark therebetween.

In this embodiment, the thickness of the second inner seal 323 is 0.2mm-0.4mm. Specifically, when the thickness of the second inner sealing portion 323 is between 0.20mm and 0.40mm, the second inner sealing portion 323 has proper strength and low puncture difficulty, and is not easy to break when being punctured, so that insoluble particles fall into the liquid medicine; when the thickness of the second inner sealing part 323 is less than 0.20mm, the second inner sealing part is easy to burn through in the injection molding process, can not be used, has low strength, is easy to break when being punctured, and can lead insoluble particles to fall into the liquid medicine; when the thickness of the second inner sealing part 323 is greater than 0.40mm, the strength of the second inner sealing part 323 is too high, larger cutting resistance can be generated in the puncturing process, puncturing difficulty is too high, and meanwhile the probability of generating insoluble particles is increased. Preferably, the thickness of the second inner sealing part 323 is 0.30mm, and the overall performance is optimal when the thickness of the second inner sealing part 323 is 0.30 mm.

Example 6

As shown in fig. 11 and 12, this embodiment differs from embodiment 1 in that: the joint comprises a third joint pipe 400, the first joint pipe 200 and the third joint pipe 400 are distributed at intervals along the length direction of the joint seat 100 and are all installed on the same joint seat 100, and the third joint pipe 400 comprises a third communication cavity 410 used for communicating an inner cavity of an infusion bag, a connecting platform 420 used for connecting an outer cover body and a conical opening 430 formed by encircling the inner side wall of the connecting platform 420 and communicated with the third communication cavity 410 and used for communicating the inner cavity of the outer cover body. Specifically, the first connector tube 200 is used for dispensing, the third connector tube 400 is used for infusion, the third connector tube 400 is communicated with the inner cavity of the infusion bag through the third communication cavity 410, the outer cover body is connected through the connecting platform 420, the inner cavity of the outer cover body is communicated through the conical opening 430, stable puncture of the infusion needle is ensured, and liquid medicine infusion is realized. It should be appreciated that the third joint pipe 400 is connected with the cover body with different structures and forms in the prior art, so as to manufacture and assemble according to different requirements, thereby improving the application range.

The infusion bag of the embodiment comprises the through hole integral type outer covering film joint in any embodiment. Specifically, the through hole integral type outer tectorial membrane joint is adopted to seal the opening of the infusion bag, so that the structure of the infusion joint is simplified, the process steps are reduced, the cost is saved, the practicability is high, and the infusion bag is suitable for wide popularization and application.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. The utility model provides a monolithic outer tectorial membrane joint of through-hole, includes joint seat (100) and first joint pipe (200) of being connected with joint seat (100), its characterized in that, first joint pipe (200) are including first intercommunication chamber (210) that are used for the inner chamber of intercommunication infusion bag and with first intercommunication chamber (210) intercommunication and keep away from puncture tip (220) that joint seat (100) laid, puncture tip (220) include:

a puncture housing (221), wherein the inner side wall of the puncture housing (221) is circumferentially enclosed to form a filling cavity (222);

a first outer sealing film (223) welded to the upper end surface of the puncture housing (221) for sealing the upper end opening of the filling chamber (222);

the inner plug (224) is in adhesive compatible connection with the inner side wall of the puncture shell (221) and is used for being filled into the filling cavity (222) through an injection molding process, the upper end face of the inner plug (224) is parallel to the end face of the puncture shell (221) or lower than the upper end face of the puncture shell (221), and the filling cavity (222) is communicated with the first communication cavity (210) so that the first communication cavity (210) is directly communicated with the inner plug (224).

2. The through-hole integral type outer film joint as claimed in claim 1, wherein the thickness of the inner plug (224) is 5mm to 6mm.

3. The through-hole integral type outer film joint according to claim 1, wherein an inner diameter of the filling chamber (222) is smaller than an inner diameter of the first communicating chamber (210).

4. The through-hole integral type outer film joint as claimed in claim 1, wherein the upper end face of the inner plug (224) is provided with a penetration groove formed by concave.

5. The through-hole integral type outer coating joint according to any one of claims 1 to 4, wherein the first joint pipe (200) includes two piercing end portions (220), and the two piercing end portions (220) are arranged at intervals in a radial direction of the first joint pipe (200) and communicate with the same first communication chamber (210).

6. The through-hole integral type outer film joint according to any one of claims 1 to 4, wherein the joint comprises two first joint pipes (200), and the two first joint pipes (200) are arranged at intervals along the length direction of the joint base (100) and are all mounted on the same joint base (100).

7. The through-hole integrated type outer film joint according to any one of claims 1 to 4, wherein the first joint tube (200) further comprises a first guide end portion (230), the piercing end portion (220) and the first guide end portion (230) are arranged at intervals in a radial direction of the first joint tube (200) and communicate with the same first communication chamber (210), the first guide end portion (230) comprises a first guide chamber (232) formed by enclosing an inner side wall of the first guide housing (231) and used for sealing connection with an infusion needle, a first inner sealing portion (233) integrally formed with a lower end portion of the first guide housing (231) and used for sealing a lower end opening of the first guide chamber (232), and a second outer sealing film (234) welded and attached to an upper end face of the first guide end portion (230) and used for sealing an upper end opening of the first guide chamber (232).

8. The through-hole integrated type outer film joint according to any one of claims 1 to 4, wherein the joint comprises a second joint tube (300), the first joint tube (200) and the second joint tube (300) are arranged at intervals along the length direction of the joint base (100) and are all mounted on the same joint base (100), the second joint tube (300) comprises a second communication cavity (310) for communicating with the inner cavity of the infusion bag and a second guide end part (320) arranged far away from the joint base (100), the second guide end part (320) comprises a second guide shell (321), a second guide cavity (322) formed by surrounding the inner side wall of the second guide shell (321) and used for being in sealing connection with an infusion needle, a second inner sealing part (323) integrally formed with the lower end part of the second guide shell (321) and used for sealing the lower end opening of the second guide cavity (322), and a third outer sealing film (324) welded on the upper end surface of the second guide end part (320) and used for sealing the upper end opening of the second guide cavity (322).

9. The through-hole integral type outer film joint according to any one of claims 1 to 4, wherein the joint comprises a third joint pipe (400), the first joint pipe (200) and the third joint pipe (400) are arranged at intervals along the length direction of the joint seat (100) and are all installed on the same joint seat (100), and the third joint pipe (400) comprises a third communication cavity (410) used for communicating an inner cavity of an infusion bag, a connecting platform (420) used for connecting an outer cover body and a conical mouth (430) formed by encircling an inner side wall of the connecting platform (420) and communicated with the third communication cavity (410) and used for communicating the inner cavity of the outer cover body.

10. An infusion bag comprising the through-hole integral type outer film joint as claimed in any one of claims 1 to 9.