Connector and infusion assembly

Abstract

The utility model provides a connector and an infusion assembly, the connector comprises a shell, the shell is provided with a flow path, a cavity communicated with the flow path and a groove communicated with the cavity, and the groove is located in the periphery of the flow path; at least part of the hollow pipe body is located in the cavity, the hollow pipe body is provided with a first end and a second end which are arranged in the axial direction, the first end and the second end are open, and the first end of the hollow pipe body is inserted into the groove; wherein the shell and the hollow pipe body are prepared by adopting a double-color injection molding process. By the adoption of the scheme, the structure and the assembling process can be simplified, the using amount of adhesion agents is reduced, and production cost reduction and environmental protection are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a connector and an infusion component. Background Art

[0002] In some scenarios, patients usually need to be given infusion therapy, such as delivering liquid medicine or blood into the patient's body. When giving infusion therapy to patients, sometimes extended tubing products are needed to increase the distance between the infusion set and the patient. In order to prevent infection, closed extended tubing products are generally used.

[0003] At present, the extension line products are provided with connectors for connecting medical instruments such as infusion equipment, and one end of the connector is usually designed with a Luer male connector structure. Since the connector needs to have good drug resistance to meet the needs of disinfection, the material of the connector needs to be selected from polymer materials with good solvent corrosion resistance, so that the connector cannot be directly connected to the infusion line solvent due to the influence of the material. In the prior art, the connector needs to be connected to the infusion line by solvent through an adapter and a transfer catheter. The connector, adapter and transfer catheter need to be assembled, and adhesives are needed when necessary, resulting in many parts of the extension line products, more raw materials consumed, high processing energy consumption, complex assembly process, and high production costs, all of which are not conducive to environmental protection. Utility Model Content

[0004] In order to solve the problems existing in the prior art, the embodiments of the utility model provide a connector and an infusion assembly, wherein the shell and the hollow tube body of the connector are prepared by a two-color injection molding process, which helps to flexibly select the materials of the shell and the hollow tube body, realize one-time processing and molding of two different materials to obtain a complete connector, and realize the connection between the connector and the catheter, simplify the product structure and assembly process, reduce the amount of adhesive used, and help reduce production costs and environmental protection.

[0005] In order to solve the above technical problems, an embodiment of the utility model provides a connector, including: a shell, having a flow path, a cavity connected to the flow path, and a groove connected to the cavity, the groove is located at the periphery of the flow path; a hollow tube body, at least partially located in the cavity, the hollow tube body having a first end and a second end arranged along the axial direction, the first end and the second end are open, and the first end of the hollow tube body is inserted into the groove; wherein the shell and the hollow tube body are prepared by a two-color injection molding process.

[0006] In some embodiments, along the first direction, the size of the groove in the second direction gradually decreases, the second direction is perpendicular to the first direction, and the first direction is parallel to the direction from the first end to the second end.

[0007] In some embodiments, the groove is annular and surrounds the flow path.

[0008] In some embodiments, the connector also includes a locking portion, which includes: a protrusion and a recessed portion that fit together, wherein the protrusion is arranged on the surface of the shell facing the hollow tube body, and the recessed portion is arranged on the surface of the hollow tube body facing the shell, or the protrusion is arranged on the surface of the hollow tube body facing the shell, and the recessed portion is arranged on the surface of the shell facing the hollow tube body.

[0009] In some embodiments, there are multiple locking parts, and the multiple locking parts are arranged in sequence along the axial direction of the hollow tube.

[0010] In some embodiments, the second end of the hollow tube has a guide portion, and the radial size of the guide portion gradually increases along the direction from the first end to the second end.

[0011] In some embodiments, an outer dimension of the housing gradually decreases from the first end to the second end.

[0012] In some embodiments, the shrinkage rate of the shell is greater than or equal to the shrinkage rate of the hollow tube.

[0013] In some embodiments, the connector further comprises a partition disposed in the flow path, wherein the partition is used to divert the liquid supplied to the flow path.

[0014] In some embodiments, the surface of the hollow tube in contact with the shell has a first protrusion, which is inserted into the shell; and / or the surface of the shell in contact with the hollow tube has a second protrusion, which is inserted into the hollow tube.

[0015] The utility model also provides an infusion assembly, comprising: any one of the above connectors.

[0016] Compared with the prior art, the technical solution of the embodiment of the utility model has the following beneficial effects:

[0017] The shell and hollow tube of the connector are prepared by a two-color injection molding process, which helps to flexibly select the materials of the shell and the hollow tube, and realize the processing of two different materials into a complete connector, which can be connected to the catheter for infusion through the hollow tube without the need for an adapter and an adapter catheter. In this way, the connection between the connector and the catheter can be achieved, avoiding the assembly between multiple parts. Therefore, the connector structure design can be simplified, the assembly process between parts can be reduced, the amount of adhesive used during assembly and the production cost can be reduced, which is beneficial to environmental protection.

[0018] Furthermore, along the first direction, the size of the groove in the second direction gradually decreases, and the second direction is perpendicular to the first direction, that is, in the first direction parallel to the first end to the second end, the size of the groove gradually shrinks, so that the groove and the part of the hollow tube body placed in the groove form an undercut structure with a reverse draft angle (also called a reverse draft angle). After the connector is formed, the separation of the hollow tube body and the shell can be avoided, thereby improving the tightness and reliability of the combination of the hollow tube body and the shell.

[0019] Furthermore, the locking portion includes a protruding portion and a recessed portion, and the cooperation of the protruding portion and the recessed portion can form an undercut connection between the shell and the hollow tube body, further improving the tightness and reliability of the combination between the shell and the hollow tube body.

[0020] Furthermore, along the direction from the first end to the second end, the radial dimension of the guide portion gradually increases, so as to facilitate the insertion of the guide catheter into the hollow tube body.

[0021] Furthermore, the shrinkage rate of the shell is greater than or equal to the shrinkage rate of the hollow tube body, and the degree of inward shrinkage of the shell is greater than or equal to the shrinkage degree of the hollow tube body. The shell exerts a covering force on the hollow tube body, thereby improving the reliability of the connection between the shell and the hollow tube body, making the connection between the shell and the hollow tube body tighter, and effectively avoiding separation of the shell and the hollow tube body. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a partial structural schematic diagram of an extension pipeline product in the prior art;

[0023] Figure 2 yes Figure 1 Exploded view of some structures in ;

[0024] Figure 3 It is a structural schematic diagram of a connector in an embodiment of the utility model;

[0025] Figure 4 yes Figure 3 Section view along section line AA;

[0026] Figure 5 yes Figure 4 Exploded diagram of

[0027] Figure 6 yes Figure 4 Schematic diagram of the local structure at B in the middle;

[0028] Figure 7 This is a schematic diagram of the structure of an infusion assembly in an embodiment of the utility model;

[0029] Figure 8 yes Figure 4 Schematic diagram of the local structure at C in the middle;

[0030] Fig. 9 It is an image of a portion of the shell surface collected under an electron microscope;

[0031] Fig.10 This is an image of a portion of the surface of a hollow tube collected under an electron microscope. DETAILED DESCRIPTION

[0032] As mentioned above, current extension line products require connectors, adapters, and transfer catheters to connect to the infusion line. Figure 1 and Figure 2 , the connector 101, the adapter 102 and the transfer catheter 103 are assembled, and then connected to the catheter 104 for infusion through the transfer catheter 103. When the connector 101, the adapter 102 and the transfer catheter 103 are assembled, in addition to mechanical connections such as threads and buckles, it is usually necessary to use adhesives to bond the parts to be connected to ensure the sealing performance of the extended pipeline product. As a result, the extended pipeline product has many parts, consumes a lot of raw materials, has high processing energy consumption, is complex in assembly process, and has high production costs, all of which are not conducive to environmental protection.

[0033] In addition, after the connector 101, the adapter 102 and the transfer catheter 103 are assembled, the extension pipeline product is longer in size and has more edges and corners (that is, more concave and convex shapes). Since the extension pipeline product usually contacts the patient's skin, it will cause discomfort to the patient during use, and the edges and corners are easy to hide dirt and grime, making it difficult to disinfect.

[0034] In order to make the above-mentioned objects, features and beneficial effects of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0035] See also Figures 3 to 6 The embodiment of the utility model provides a connector 100, which includes: a shell 1 and a hollow tube 2. The shell 1 has a flow path 11, a cavity 12 connected to the flow path 11, and a groove 13 connected to the cavity 12. The groove 13 is located at the periphery of the flow path 11. The hollow tube 2 is at least partially located in the cavity 12, and the hollow tube 2 has a first end 21 and a second end 22 arranged in the axial direction, the first end 21 and the second end 22 are open, and the first end 21 of the hollow tube 2 is inserted into the groove 13. The shell 1 and the hollow tube 2 are prepared by a two-color injection molding process.

[0036] As can be seen from the above, the shell 1 and the hollow tube 2 of the connector 100 are prepared by a two-color injection molding process, which helps to flexibly select the materials of the shell 1 and the hollow tube 2, and realizes that two different materials are processed and molded at one time to obtain a complete connector 100, which can be connected to the catheter for infusion through the hollow tube 2 without the need for an adapter and an adapter catheter. In this way, the connection between the connector 100 and the catheter can be achieved, and the assembly between multiple components can be avoided. Therefore, the connector structure design can be simplified, the assembly process between components can be reduced, the amount of adhesive used during assembly and the production cost can be reduced, which is beneficial to environmental protection.

[0037] In addition, the function that can be achieved by a connector 100 provided by the utility model is the same as the function of multiple components in existing extension pipeline products after assembly, that is, the connector 100 provided by the embodiment of the utility model can be directly connected to the catheter, while the existing extension pipeline products require the connector 101, the adapter 102 and the transfer catheter 103 to be assembled and then connected to the pipeline through the transfer catheter 103. While achieving the same function, the connector 100 provided by the utility model is smaller in size and can effectively reduce the edges and corners, avoiding the edges and corners from pressing the patient's skin during use, improving the patient's use experience, and in addition, by reducing the edges and corners, the concave and convex shapes are reduced, reducing the dirt and grime, and facilitating disinfection.

[0038] In a specific implementation, the hollow tube 2 can be partially located outside the housing 1 to facilitate the two-color injection molding operation. It is understandable that the hollow tube 2 can also be completely accommodated in the cavity 12 of the housing 1.

[0039] In a specific implementation, along the first direction x, the size of the groove 13 in the second direction y gradually decreases, the second direction y is perpendicular to the first direction x, and the first direction x is parallel to the direction from the first end 21 to the second end 22 .

[0040] Since the groove 13 is connected to the cavity 12, and the size of the groove 13 in the second direction y gradually decreases, the groove 13 gradually shrinks in the first direction, so that the groove 13 and the part of the hollow tube body 2 placed in the groove 13 form an undercut structure with a reverse draft angle (also called a reverse draft angle). After the connector 100 is formed, the separation of the hollow tube body 2 and the shell 1 can be avoided, thereby improving the tightness and reliability of the combination of the hollow tube body 2 and the shell 1.

[0041] In some non-limiting embodiments, the groove 13 is annular and surrounds the flow path 11 .

[0042] In some embodiments, an annular wall 14 is provided between the groove 13 and the flow path 11 .

[0043] In a specific implementation, when the shell 1 and the hollow tube body 2 are double-injected, the shape of the shell 1 is firstly obtained by injection molding, and then the hollow tube body 2 is obtained by injection molding on the basis of the shell 1 .

[0044] In some embodiments, in combination Figures 8 to 10 The surface of the hollow tube 2 in contact with the shell 1 has a first protrusion 24, and the first protrusion 24 is inserted into the shell 1; and / or the surface of the shell 1 in contact with the hollow tube 2 has a second protrusion 15, and the second protrusion 15 is inserted into the hollow tube 2.

[0045] In some non-limiting embodiments, the first protrusion 24 and / or the second protrusion 15 can be formed by an anchoring effect. Specifically, when the hollow tube body 2 is injection molded, by configuring one or more of the injection pressure, the injection speed, and the injection temperature, the partially molten material used for injection molding the hollow tube body 2 can be infiltrated into the shell 1 to produce an anchoring effect, so as to further enhance the bonding tightness between the shell 1 and the hollow tube body 2. That is, one or more first protrusions 24 are formed on the surface where the hollow tube body 2 contacts the shell 1, and the first protrusions 24 are inserted into the shell 1. The first protrusions 24 can be continuous or intermittent. Due to the high temperature during the injection molding of the hollow tube body 2, this will also cause the shell 1 to partially melt where the molten material of the hollow tube body 2 contacts, so that the partially melted material of the shell 1 will merge with the material of the hollow tube body 2, and then after the connector 100 is finally formed, one or more second protrusions 15 are formed on the surface where the shell 1 contacts the hollow tube body 2, and the second protrusions 15 are inserted into the hollow tube body 2. The second protrusion 15 may be continuous or discontinuous.

[0046] It should be noted that, in order to facilitate the distinction and intuitive display of the structures such as the housing 1, the hollow tube 2 and the first protrusion 24, Figure 8 The structures of the shell 1 and the hollow tube 2 are rendered. Fig. 9 and Fig.10 After the shell 1 and the hollow tube 2 are separated, images of partial surfaces of the shell 1 and the hollow tube 2 are collected under an electron microscope.

[0047] The shell 1 and the hollow tube 2 can be made of different materials. The shell 1 is made of a material that is resistant to drugs and solvent corrosion, for example, it can be a polyolefin material such as polyethylene, polypropylene, ethylene-propylene copolymer, or a polyester material, or a resin material, or other suitable types of materials that are known or will be used in the future, etc., which will not be listed one by one here. The hollow tube 2 can be made of a material that can be connected to the catheter solvent, such as polybutadiene, polyvinyl chloride, ethylene-vinyl acetate copolymer, polyurethane, acrylonitrile-butadiene-styrene copolymer (ABS resin), acrylonitrile-styrene copolymer (AS resin), etc. It should be noted that the materials of the shell 1 and the hollow tube 2 are not limited to the above examples. In practice, other suitable materials can also be used, which will not be listed one by one here.

[0048] In some embodiments, the shrinkage rate of the shell 1 is greater than or equal to the shrinkage rate of the hollow tube 2. In this way, after the connector 100 is formed, the shell 1 shrinks inward to a degree greater than or equal to the shrinkage degree of the hollow tube 2, which can avoid cracking between the shell 1 and the hollow tube 2 after forming. In particular, when the shrinkage rate of the shell 1 is greater than the shrinkage rate of the hollow tube 2, the shell 1 shrinks inward to a degree greater than the shrinkage degree of the hollow tube 2, and the shell 1 generates a covering force on the hollow tube 2, thereby improving the reliability of the combination between the shell 1 and the hollow tube 2, making the combination of the shell 1 and the hollow tube 2 tighter, and effectively avoiding the separation of the shell 1 and the hollow tube 2.

[0049] In a specific implementation, the connector 100 further includes a locking portion 3. The locking portion 3 includes: a protrusion 31 and a recess 32 that fit each other. The protrusion 31 and the recess 32 cooperate to form an undercut connection, further improving the tightness and reliability of the combination between the housing 1 and the hollow tube 2.

[0050] In some embodiments, the protrusion 31 is disposed on a surface of the shell 1 facing the hollow tube 2 , and the recess 32 is disposed on a surface of the hollow tube 2 facing the shell 1 .

[0051] In some other embodiments, the protrusion 31 is disposed on a surface of the hollow tube 2 facing the shell 1 , and the recess 32 is disposed on a surface of the shell 1 facing the hollow tube 2 .

[0052] There are multiple locking parts 3 , and the multiple locking parts 3 are arranged in sequence along the axial direction of the hollow tube 2 .

[0053] The multiple locking portions 3 may be distributed in a spiral shape around the axial direction of the hollow tube 2. The multiple locking portions 3 may also be distributed around the circumference of the hollow tube 2 and arranged at intervals along the axial direction of the hollow tube 2.

[0054] Take the example that the protrusion 31 is provided on the hollow tube 2 and the recess 32 is provided on the shell 1. The protrusion 31 may be a continuous convex rib. The convex rib is distributed circumferentially around the hollow tube 2 or is distributed spirally around the axial direction of the hollow tube 2. The protrusion 31 may also be a plurality of convex blocks, which are relatively independently provided on the surface of the hollow tube 2 facing the shell 1.

[0055] Reference Figure 4 and Figure 5 The cross section of the protrusion 31 along the axial direction of the connector 100 may be in an arc shape, a triangle shape or other suitable shapes. The shape of the recessed portion 32 matches the shape of the protrusion 31 .

[0056] Continuing with the example that the protrusion 31 is provided on the hollow tube 2 and the recess 32 is provided on the shell 1, after the shell 1 is obtained by injection molding, the recess 32 is formed on the shell 1. After the injection molding of the shell 1 is completed, when the hollow tube 2 is further injection molded on the basis of the shell 1, the recess 32 is filled with the injection molding material selected for the hollow tube 2, and after the injection molding of the hollow tube 2 is completed, the protrusion 31 is formed.

[0057] In a specific implementation, the second end 22 of the hollow tube 2 has a guide portion 23, and the radial dimension of the guide portion 23 gradually increases from the first end 21 to the second end 22. The guide portion 23 is trumpet-shaped, and the guide portion 23 is provided to facilitate the insertion of the guiding catheter into the hollow tube 2.

[0058] In some non-limiting embodiments, the inner diameter of the cavity 12 is greater than the inner diameter of the flow path 11. The inner diameter of the flow path 11 may be the same as the inner diameter of the catheter, so that the liquid output by the flow path 11 can smoothly enter the catheter and effectively avoid liquid retention.

[0059] In a specific implementation, the outer dimensions of the housing 1 gradually decrease from the first end 21 to the second end 22. In this way, the outer surface of the housing 1 may be tapered or have a certain slope, so as to be more ergonomic, reduce the pressure on the skin caused by the contact part between the connector 100 and the patient's skin, and improve the patient's comfort.

[0060] In some embodiments, the connector 100 may further include a connection portion for connecting to an external interface. The external interface may be connected to the connection portion by welding.

[0061] In some embodiments, a partition may be further provided in the flow path 11 of the connector 100, and the partition is used to divert the liquid in the flow path 11. The partition may be connected to the inner wall of the flow path 11 through a connecting arm, and there is a gap between the partition and the flow path 11. The liquid supplied to the flow path 11 of the connector 100 enters the connector 100 and collides with the partition, and then diverts, and enters the cavity 12 through the flow path 11. Under the action of the partition, turbulence is formed in the liquid flow path 11, thereby preventing the liquid from being retained in the flow path 11 and the cavity 12.

[0062] In the direction from the first end 21 to the second end 22, the upstream surface of the partition serves as a liquid collision surface, and the liquid collision surface collides with the liquid supplied into the flow path 11 of the connector 100 to generate a vortex, which helps the liquid flow and avoids liquid retention. The liquid collision surface can be set to various suitable shapes such as an arc shape, a cone shape, etc.

[0063] In addition, the conduit connected in the hollow tube body 2 can abut against the deepest wall of the cavity 12 (that is, the wall closest to the flow path 11). The conduit connected in the hollow tube body 2 can also maintain a certain distance from the deepest wall of the cavity 12. Since the inner diameter of the cavity 12 is larger than the inner diameter of the conduit, when the liquid enters the conduit through the flow path 11 and the cavity 12, a vortex will be formed upstream of the conduit. The formed vortex helps the liquid to enter the conduit smoothly and avoids retention upstream of the conduit.

[0064] The utility model also provides an infusion assembly, comprising: any one of the above connectors 100 .

[0065] In some embodiments, reference Figure 7 The infusion assembly may further include an interface 200 fixedly connected to the housing 1 of the connector 100; a connector 300; and a catheter 400, one end of which is inserted into the hollow tube 2, and the other end of which is connected to the connector 300.

[0066] In some embodiments, the infusion assembly may further include a flow stopper 500 , which is disposed on the catheter 400 and is used to close the catheter 400 to stop the flow of liquid such as an infusion agent in the catheter 400 .

[0067] In some embodiments, the infusion assembly may further include a protective cap 600, which is detachably connected to the connector 300 and is used to seal the connector 300 to ensure the cleanliness of the infusion assembly. When the infusion assembly is used, the protective cap 600 can be removed.

[0068] The connector 100 of the infusion assembly can be connected to a first medical device such as an infusion device with an external conical connector, and the connector 300 is used to connect a second medical device such as an indwelling needle. In this way, an infusion line between the first medical device and the second medical device can be formed through the infusion assembly, and the length of the infusion line can be extended and supplemented.

[0069] In a specific implementation, the infusion assembly may further include one or more of a drip clamp, a drip tube, and a ventilation filter for adjusting the infusion volume in the catheter 400 .

[0070] It should be noted that the infusion component can not only be used as an extension pipeline component for extending the infusion pipeline, but also as a branch infusion component to be connected to the main infusion pipeline. Depending on the actual application scenario and purpose, the role achieved by the infusion component is different.

[0071] Although the utility model is disclosed as above, the utility model is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the utility model. Therefore, the protection scope of the utility model shall be subject to the scope defined by the claims.

Claims

1. A connector, characterized in that: include: A housing having a flow path, a cavity communicating with the flow path, and a groove communicating with the cavity, wherein the groove is located at the periphery of the flow path; a hollow tube, at least partly located in the cavity, the hollow tube having a first end and a second end arranged in the axial direction, the first end and the second end being open, and the first end of the hollow tube being inserted into the groove; Wherein, the shell and the hollow tube are prepared by a two-color injection molding process.

2. The connector according to claim 1, wherein: Along the first direction, the size of the groove in the second direction gradually decreases, the second direction is perpendicular to the first direction, and the first direction is parallel to the direction from the first end to the second end.

3. The connector according to claim 2, characterized in that The groove is annular and surrounds the flow path.

4. The connector according to claim 1, wherein: It also includes a locking portion, which includes: a protrusion and a recessed portion that fit each other, wherein the protrusion is arranged on the surface of the shell facing the hollow tube body, and the recessed portion is arranged on the surface of the hollow tube body facing the shell, or the protrusion is arranged on the surface of the hollow tube body facing the shell, and the recessed portion is arranged on the surface of the shell facing the hollow tube body.

5. The connector according to claim 4, characterized in that: The number of the locking parts is multiple, and the multiple locking parts are arranged in sequence along the axial direction of the hollow tube.

6. The connector according to claim 1, wherein: The second end of the hollow tube body has a guide portion, and the radial dimension of the guide portion gradually increases along the direction from the first end to the second end.

7. The connector according to claim 1, wherein: The shrinkage rate of the shell is greater than or equal to the shrinkage rate of the hollow tube.

8. The connector according to claim 1, wherein: The invention also includes a partition disposed in the flow path, wherein the partition is used to divide the liquid supplied to the flow path.

9. The connector according to claim 1, wherein: The surface of the hollow tube body in contact with the shell has a first protrusion, which is inserted into the shell; and / or the surface of the shell body in contact with the hollow tube body has a second protrusion, which is inserted into the hollow tube body.

10. An infusion assembly, characterized in that: include: A connector as claimed in any one of claims 1 to 9.

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