CN219022690U

CN219022690U - Negative pressure needleless connector

Info

Publication number: CN219022690U
Application number: CN202223325827.9U
Authority: CN
Inventors: 全昌平
Original assignee: Shenzhen Maiketian Life Science Co ltd
Current assignee: Shenzhen Maiketian Life Science Co ltd
Priority date: 2022-12-09
Filing date: 2022-12-09
Publication date: 2023-05-16
Anticipated expiration: 2032-12-09

Abstract

The application provides a negative pressure needleless connector, which comprises an upper cover, a lower cover and an elastic valve core; the upper cover comprises an upper cover body and a first connecting part, wherein a first through hole is formed in the upper cover body, and a second through hole is formed in the first connecting part; the elastic valve core comprises a first connecting plate, a second connecting plate and a connecting column, and two ends of the connecting column are respectively connected with the first connecting plate and the second connecting plate; the lower cover comprises a lower cover body and a second connecting part, and a third through hole is formed in the lower cover; the upper cover and the lower cover are connected with each other through the first connecting part and the second connecting part; the upper cover and the elastic valve core are of an integrated structure; the first connecting plate is positioned at one side of the upper cover body, which is away from the first connecting part, and shields the first through hole; the connecting column is arranged in the first through hole in a penetrating way; the second connecting plate is arranged in the second through hole; the elastic valve core is internally provided with a gap penetrating through the first connecting plate and the connecting column. The negative pressure needleless connector is beneficial to simplifying the assembly process of each component of the negative pressure needleless connector and reducing the assembly difficulty.

Description

Negative pressure needleless connector

Technical Field

The application relates to the manufacturing technology of medical instruments, in particular to a negative pressure needleless connector.

Background

The indwelling needle can be used for multiple times by puncturing the vein of the patient only once, so that the pain of the patient caused by repeated venipuncture is reduced, and the indwelling needle is widely applied clinically. In particular, when in use, the indwelling needle can be connected with the injector through the needleless connector, and the needleless connector can be divided into a positive pressure needleless connector, a negative pressure needleless connector and a balance pressure needleless connector according to functions. Wherein, the negative pressure needleless connector is disconnected with the injector, and the liquid flows back to one side of the negative pressure needleless connector.

In the related art, the negative pressure needleless connector is generally composed of an upper cover, a lower cover and a valve core, the valve core is required to be pressed into the upper cover during assembly, and then the upper cover and the lower cover are combined, so that the assembly is complex and difficult.

Disclosure of Invention

In order to overcome the defects in the related art, the purpose of the application is to provide a negative pressure needleless connector, and an upper cover and a valve core of the application are integrally formed, so that the assembly difficulty of all parts of the negative pressure needleless connector is reduced.

The application provides a negative pressure needleless connector, which comprises an upper cover, a lower cover and an elastic valve core;

the upper cover comprises an upper cover body and a first connecting part, wherein a first through hole is formed in the upper cover body, a second through hole is formed in the first connecting part, and the diameter of the second through hole is larger than that of the first through hole;

the elastic valve core comprises a first connecting plate, a second connecting plate and a connecting column, and two ends of the connecting column are respectively connected with the first connecting plate and the second connecting plate;

the lower cover comprises a lower cover body and a second connecting part, and a third through hole is formed in the lower cover;

the upper cover and the lower cover are connected with each other through the first connecting part and the second connecting part, and the first through hole, the second through hole and the third through hole are communicated with each other after the upper cover and the lower cover are connected;

the upper cover and the elastic valve core are of an integrated structure; the first connecting plate is positioned at one side of the upper cover body, which is away from the first connecting part, and shields the first through hole; the connecting column is arranged in the first through hole in a penetrating mode; the second connecting plate is arranged in the second through hole; the elastic valve core is internally provided with a gap penetrating through the first connecting plate and the connecting column, and the gap is sealed under the action of the self elastic force of the elastic valve core in a free state.

As mentioned above, the negative pressure needleless connector, optionally, the upper cover and the elastic valve core form an integral molding structure by injection molding.

As mentioned above, the second connecting plate is optionally provided with two process holes communicated with the first through hole, and the two process holes are respectively located at two sides of the connecting column.

As described above, optionally, a first gap is formed between the inner side wall of the upper cover body and the process hole, and a connection protrusion is formed on the inner side wall of the first connection portion, and the connection protrusion is connected with the side wall of the second connection plate.

The negative pressure needleless connector as described above, optionally, the first gap is 0.1mm or less, and the height of the connecting protrusion is 0.1mm or less.

As described above, optionally, the upper cover is a polycarbonate upper cover, the elastic valve core is a silica gel valve core, and the lower cover is a polycarbonate lower cover.

As described above, optionally, the surface of the first connecting portion facing the lower cover is provided with a first matching structure, the second connecting portion is a flange disposed on the outer surface of the lower cover body, and the flange is provided with a second matching structure adapted to the first matching structure.

As described above, the negative pressure needleless connector may be configured such that the first engagement structure is provided in a middle portion of a surface of the first connection portion facing the lower cap, and the second engagement structure is provided in a middle portion of the flange.

The negative pressure needleless connector as described above, optionally, the lower cover further comprises an abutment portion and a liquid guiding portion;

the abutting part is arranged on one side of the lower cover body, which faces the upper cover, and is positioned in the second matching structure, a sealing groove is arranged on one side of the second connecting plate, which faces the lower cover, and the abutting part abuts in the sealing groove;

the liquid guide part is arranged in the lower cover body, one end of the liquid guide part is connected with the abutting part, and the third through hole is formed in the liquid guide part.

As described above, optionally, the elastic valve core further includes an encapsulating layer, and the encapsulating layer extends outwards from the end of the first connecting portion and is coated on the peripheral wall of the upper cover body.

The application provides a negative pressure needleless connector, which comprises an upper cover, a lower cover and an elastic valve core; the upper cover comprises an upper cover body and a first connecting part, wherein a first through hole is formed in the upper cover body, a second through hole is formed in the first connecting part, and the diameter of the second through hole is larger than that of the first through hole; the elastic valve core comprises a first connecting plate, a second connecting plate and a connecting column, and two ends of the connecting column are respectively connected with the first connecting plate and the second connecting plate; the lower cover comprises a lower cover body and a second connecting part, and a third through hole is formed in the lower cover; the upper cover and the lower cover are connected with each other through the first connecting part and the second connecting part, and after the upper cover and the lower cover are connected, the first through hole, the second through hole and the third through hole are communicated with each other; the upper cover and the elastic valve core are of an integrated structure; the first connecting plate is positioned at one side of the upper cover body, which is away from the first connecting part, and shields the first through hole; the connecting column is arranged in the first through hole in a penetrating way; the second connecting plate is arranged in the second through hole; the elastic valve core is internally provided with a gap penetrating through the first connecting plate and the connecting column, and in a free state, the gap is sealed under the action of the self elastic force of the elastic valve core. The upper cover and the elastic valve core are integrally formed, so that the upper cover and the elastic valve core are assembled into a whole after being manufactured independently, the related assembly process is omitted, the assembly process of each part of the negative pressure needleless connector is simplified, and the assembly difficulty is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the related art, the following description will briefly describe the drawings that are required to be used in the embodiments or the related technical descriptions, and it is obvious that, in the following description, the drawings are some embodiments of the present application, and other drawings may be obtained according to these drawings without any inventive effort for a person skilled in the art.

FIG. 1 is a schematic illustration of a negative pressure needleless connector provided in an embodiment of the present application;

FIG. 2 is a schematic diagram of an upper cover and an elastic valve core according to an embodiment of the present disclosure;

FIG. 3 is an enlarged view of a portion A of FIG. 2;

FIG. 4 is an enlarged view of a portion B of FIG. 2;

fig. 5 is a schematic view of the structure of the lower cover according to an embodiment of the present application.

Reference numerals:

100-upper cover; 110-an upper cover body; 111-a first through hole; 120-a first connection; 121-a second through hole; 122-connecting protrusions; 123-a first mating structure;

200-a lower cover; 210-a lower cover body; 220-a second connection; 221-a second mating structure; 230-abutment; 240-a liquid guiding part; 241-third through holes;

300-elastic valve core; 310-a first connection plate; 320-a second connection plate; 321-process holes; 322-sealing groove; 330-connecting columns; 340-gap; 350-an adhesive coating layer.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments.

All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure. The following embodiments and features of the embodiments may be combined with each other without conflict.

In the related art, the upper cover, the lower cover and the valve core are injection molding pieces, wherein a through hole is formed in the upper cover, the valve core is required to be arranged in the through hole in a penetrating mode and is covered on the upper surface of the upper cover during assembly, then the upper surfaces of the valve core and the upper cover are bonded by glue and then are solidified by UV light irradiation, and finally the lower cover and the upper cover are welded into a whole through ultrasonic waves. In the process, the upper cover, the lower cover and the valve core are assembled after being independently molded, and the whole assembly process has long period and complex procedure; when the valve core is mounted on the upper cover, the valve core needs to be extruded so as to pass through the through hole in the upper cover, and the assembly is difficult.

In view of this, this application aims at providing a negative pressure needleless connector, through setting up upper cover and elastic valve core as integrated into one piece structure to need not to make alone and assemble two as an organic wholes again after upper cover and the elastic valve core, saved relevant assembly process, be favorable to simplifying the assembly process of each part of negative pressure needleless connector, reduce the equipment degree of difficulty.

The following detailed description of embodiments of the present application will be presented in conjunction with the accompanying drawings to enable one skilled in the art to more fully understand the present application.

FIG. 1 is a schematic illustration of a negative pressure needleless connector provided in an embodiment of the present application; FIG. 2 is a schematic diagram of an upper cover and an elastic valve core according to an embodiment of the present disclosure; FIG. 3 is an enlarged view of a portion A of FIG. 2; FIG. 4 is an enlarged view of a portion B of FIG. 2; fig. 5 is a schematic view of the structure of the lower cover according to an embodiment of the present application.

Referring to fig. 1-5, the present embodiment provides a negative pressure needleless connector, which includes an upper cover 100, a lower cover 200, and an elastic valve core 300.

The upper cover 100 includes an upper cover body 110 and a first connecting portion 120, and both the upper cover body 110 and the first connecting portion 120 may have a cylindrical shape. The upper cover body 110 has a first through hole 111 formed therein, the first connection part 120 has a second through hole 121 formed therein, the first through hole 111 and the second through hole 121 are communicated with each other, and the second through hole 121 has a diameter larger than that of the first through hole 111.

The elastic valve core 300 includes a first connection plate 310, a second connection plate 320, and a connection post 330, and both ends of the connection post 330 are respectively connected with the first connection plate 310 and the second connection plate 320, so that the elastic valve core 300 is formed as a whole.

The lower cover 200 includes a lower cover body 210 and a second connection portion 220, the lower cover body 210 is also substantially cylindrical, and a third through hole 241 is formed in the lower cover 200.

The upper cover 100 and the lower cover 200 are connected to each other by the first connection part 120 and the second connection part 220, and after the upper cover 100 and the lower cover 200 are connected, the first through hole 111, the second through hole 121 and the third through hole 241 are communicated with each other, and in this embodiment, the first through hole 111, the second through hole 121 and the third through hole 241 may be coaxially arranged, and the diameters of the first through hole 111, the second through hole 121 and the third through hole 241 may be selected as required.

In this embodiment, the upper cover 100 and the elastic valve element 300 are integrally formed. Specifically, the first connection plate 310 is located at a side of the upper cover body 110 facing away from the first connection part 120, and shields the first through hole 111, thereby ensuring the tightness of the first through hole 111. The connection post 330 is disposed in the first through hole 111, and the second connection plate 320 is disposed in the second through hole 121. The elastic valve core 300 is provided with a slit 340 penetrating the first connecting plate 310 and the connecting post 330, the slit 340 can extend into the second through hole 121, in a free state, the slit 340 is sealed under the action of the elastic force of the elastic valve core 300, and after the lower cover 200 is assembled with the indwelling needle, the first through hole 111 is shielded by the first connecting plate 310 of the elastic valve core, so that foreign matters can be prevented from entering the user. When the syringe is inserted into the slit 340, the slit 340 may be pressed to form a passage, so that the liquid in the syringe passes through the second through-hole 121 and the third through-hole 241 and then enters the indwelling needle, and thus flows into the user's body.

As can be seen from the above description, in this embodiment, the upper cover 100 and the elastic valve core 300 are integrally formed, so that the upper cover 100 and the elastic valve core 300 do not need to be separately manufactured and then assembled together, and related assembly processes are omitted. When the negative pressure needleless connector is assembled, the upper cover 100 and the lower cover 200 are only required to be connected with each other through the first connecting part 120 and the second connecting part 220, so that the assembly process of each component of the negative pressure needleless connector is simplified, and the assembly difficulty is reduced.

In one possible embodiment, the upper cover 100 and the elastic valve element 300 of the present embodiment are preferably formed as an integral structure by injection molding. Specifically, when the upper cover 100 and the valve core 300 are manufactured, the upper cover 100 and the valve core 300 are put into an injection molding machine, the upper cover 100 can be independently injection molded, then the position of the mold is adjusted on the basis of forming the upper cover 100, and the elastic valve core 300 is injection molded on the inner side of the upper cover 100, so that an integrated structure of the upper cover 100 and the elastic valve core 300 is formed in the injection molding process of the same injection molding machine, the related assembly process of the upper cover 100 and the elastic valve core 300 is omitted, the assembly process of the negative pressure needleless connector is simplified, and the assembly difficulty is reduced.

Further, in order to implement the injection molding process of the upper cover 100 and the elastic valve core 300, in this embodiment, two process holes 321 communicating with the first through hole 111 are provided on the second connecting plate 320, and the two process holes 321 are respectively located at two sides of the connecting post 330. Preferably, the two process holes 321 may be symmetrically disposed with respect to the connection post 330. After the injection molding of the upper cover 100 is completed, the mold may be inserted into the first through hole 111, so that the connection post 330 is injection molded in the first through hole 111, and the first connection plate 310 and the second connection plate 320 are respectively injection molded at two sides, and the process hole 321 is formed on the second connection plate 320 after the mold is removed.

Further, as shown in fig. 3 and 4, a first gap D1 is formed between the inner sidewall of the upper cover body 110 and the process hole 321, and a connecting protrusion 122 is formed on the inner sidewall of the first connecting portion 120, and the connecting protrusion 122 is connected to the sidewall of the second connecting plate 320. That is, when the mold is inserted into the upper cover 100, the mold does not contact the upper cover body 110 and the first connection portion 120 located under the connection protrusion 122, thereby reducing friction between the mold and the upper cover 100 during injection molding, and preventing the upper cover 100 from affecting the service life of the mold due to falling debris caused by friction.

Preferably, the first gap D1 is less than or equal to 0.1mm in this embodiment, and the height D2 of the connecting protrusion 122 is less than or equal to 0.1mm.

Preferably, the upper cover 100 in the present embodiment is a polycarbonate upper cover, the elastic valve core 300 is a silica gel valve core, and the lower cover 200 is a polycarbonate lower cover. The adoption of the materials can ensure that the elastic valve core 300 can be effectively adhered to the upper cover 100, so as to achieve the sealing effect. Meanwhile, the elastic valve core 300 has good elasticity, the gap 340 in the elastic valve core 300 can form a complete passage under the extrusion of the injector, and after the injector is taken out, the gap 340 rebounds to the original position under the action of the elastic restoring force of the elastic valve core 300, so that the passage is closed, and good tightness is ensured.

With continued reference to fig. 1, 2 and 5, in one possible embodiment, the surface of the first connecting portion 120 facing the lower cover 200 in this embodiment is provided with a first mating structure 123, the second connecting portion 220 is a flange disposed on the outer surface of the lower cover body 210, the flange is provided with a second mating structure 221 adapted to the first mating structure 123, and the upper cover 100 and the lower cover 200 are integrally connected by abutting the first mating structure 123 and the second mating structure 221. Specifically, the first and

second coupling structures

123 and 221 may be integrally coupled by high-frequency ultrasonic welding after being abutted, thereby coupling the upper and

lower covers

100 and 200 to each other.

Preferably, the first fitting structure 123 is disposed at the middle of the surface of the first connection part 120 facing the lower cover 200 in the present embodiment, and the second fitting structure 221 is disposed at the middle of the flange. With the above structure, the melted material welded by the first mating structure 123 flows to both sides, and the melted material welded by the second mating structure 221 flows to both sides, so that the two materials are fully contacted and fused, and the welding and fixing of the first connecting portion 120 and the second connecting portion 220 are facilitated.

Alternatively, the first mating structure 123 of the present embodiment may be a groove, and the second mating structure 221 may be a protrusion; alternatively, the first fitting structure 123 may be a protrusion and the second fitting structure 221 may be a groove.

For example, taking the first mating structure 123 as a groove and the second mating structure 221 as a protrusion, in this embodiment, the cross section of the first mating structure 123 and the cross section of the second mating structure 221 may be triangular, rectangular, semicircular, and the like.

With continued reference to fig. 1 and 5, in one possible embodiment, the lower cover 200 of the present embodiment further includes an abutment portion 230 and a liquid guiding portion 240, and the abutment portion 230 and the liquid guiding portion 240 may have a substantially cylindrical shape.

The abutting portion 230 is disposed on a side of the lower cover body 210 facing the upper cover 100 and located in the second matching structure 221, and a sealing groove 322 is disposed on a side of the second connecting plate 320 facing the lower cover 200, and the abutting portion 230 abuts against the sealing groove 322, so as to ensure connection tightness between the lower cover 200 and the elastic valve core 300.

The liquid guiding part 240 is disposed in the lower cap body 210, one end of the liquid guiding part 240 is connected to the abutting part 230, and a third through hole 241 is formed in the liquid guiding part 240 so as to receive the liquid flowing out of the slit 340 from the syringe.

In this embodiment, a threaded connection structure may be further disposed on a side of the lower cap body 210 facing the liquid guiding portion 240, so as to be connected with the indwelling needle.

In this embodiment, the elastic valve core 300 further includes an encapsulating layer 350, and the encapsulating layer 350 extends outwards from the end of the first connecting portion 120 and wraps part or all of the peripheral wall of the upper cover body 110. As shown in fig. 1-2, the glue coating layer 350 is coated on the top side of the outer peripheral wall of the upper cover body 110. In another embodiment, the glue coating 350 may be on the entire peripheral wall of the cap body 110. With the above arrangement, the encapsulation layer 350 can prevent the first connection plate 310 of the elastic valve core 300 from being caught inside the upper cover by the external force during the process of inserting the indwelling needle into the slit of the elastic valve core.

In the description of the present application, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," etc. indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the present application.

In this application, unless specifically stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

It should be noted that in the description of the present application, the terms "first," "second," and the like are merely used for convenience in describing the various components and are not to be construed as indicating or implying a sequential relationship, relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature.

In this application, each embodiment or implementation is described in a progressive manner, and each embodiment focuses on a difference from other embodiments, and identical and similar parts between the embodiments are only needed to see each other.

In the description of the present application, descriptions of the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this application, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. The negative pressure needleless connector is characterized by comprising an upper cover, a lower cover and an elastic valve core;

2. The negative pressure needleless connection of claim 1, wherein the upper cover and the elastic valve core form an integral structure by injection molding.

3. The negative pressure needleless connector of claim 1 or 2, wherein the second connecting plate is provided with two process holes communicated with the first through hole, and the two process holes are respectively positioned at two sides of the connecting column.

4. The negative pressure needleless connector of claim 3, wherein a first gap is formed between the inner sidewall of the upper cover body and the process hole, and a connection protrusion is formed on the inner sidewall of the first connection portion, and the connection protrusion is connected with the sidewall of the second connection plate.

5. The negative pressure needleless connector of claim 4, wherein the first gap is 0.1mm or less and the connecting projection has a height of 0.1mm or less.

6. The negative pressure needleless connector of claim 1, wherein the upper cover is a polycarbonate upper cover, the resilient valve core is a silicone valve core, and the lower cover is a polycarbonate lower cover.

7. The negative pressure needleless connector of claim 1, wherein a first mating structure is provided on a surface of the first connecting portion facing the lower cover, the second connecting portion is a flange provided on an outer surface of the lower cover body, and a second mating structure adapted to the first mating structure is provided on the flange.

8. The negative pressure needleless connector of claim 7, wherein the first mating structure is disposed in a middle portion of a surface of the first connection portion facing the lower cap, and the second mating structure is disposed in a middle portion of the flange.

9. The negative pressure needleless connector of claim 7, wherein the lower cap further comprises an abutment and a liquid guide;

10. The negative pressure needleless connector of claim 1, wherein the resilient valve element further comprises an encapsulation layer extending outwardly from an end of the first connecting portion and coating the peripheral wall of the upper cover body.