Infusion tube assembly and infusion device

Abstract

The embodiment of the present application provides a kind of infusion tube assembly and infusion equipment.The infusion tube assembly is applied to the infusion equipment with infusion tube, and the infusion tube assembly includes joint, infusion tube and silica gel tube.The first channel for liquid flow is formed in the inside of joint, for being communicated with one end of first channel;The second channel for liquid flow is formed in the inside of silica gel tube, and the second channel is communicated with the other end of first channel, and the hardness of silica gel tube is lower than the hardness of infusion tube;The joint and silica gel tube are integrated, so that the joint is communicated with silica gel tube and infusion equipment.The infusion tube assembly and infusion equipment provided by the embodiment of the present application set up the integrated structure of joint and silica gel tube, do not need to be installed by adhesive, can reduce the process of assembly, improve the reliability of joint and silica gel tube connection, and guarantee the consistency of production.

Description

Technical Field

[0001] This application relates to the field of infusion equipment technology, and more particularly to an infusion tubing assembly and an infusion device. Background Technology

[0002] In the field of medical equipment, infusion pumps are key devices widely used in hospitals, clinics, and other settings. The working principle of an infusion pump is to deliver liquids in a directed manner by squeezing silicone tubing. Silicone tubing is widely used due to its excellent flexibility, pressure resistance, and biocompatibility.

[0003] In related technologies, the connection between silicone tubing and ordinary infusion tubing often requires additional fixing structures or processes, such as bonding.

[0004] However, the above connection method will increase production costs and assembly difficulty, and may also lead to liquid leakage or infusion interruption due to weak connection, thereby affecting patient safety. Summary of the Invention

[0005] This application provides an infusion tubing assembly and infusion device to address the issue that the connection method between silicone tubing and ordinary infusion tubing in related technologies increases production costs and assembly difficulty, and may also lead to liquid leakage or infusion interruption, thereby affecting patient safety.

[0006] In a first aspect, embodiments of this application provide an infusion tubing assembly for use in an infusion device having an infusion tubing, the infusion tubing assembly comprising:

[0007] The connector has an internal channel for liquid flow.

[0008] An infusion tube is used to connect to one end of the first channel;

[0009] The silicone tube has a second channel formed inside for liquid flow, and the second channel is connected to the other end of the first channel. The hardness of the silicone tube is lower than that of the infusion tube.

[0010] The connector and the silicone tube are integrated into one piece, so that the connector connects the silicone tube to the infusion device.

[0011] In the above-mentioned infusion tubing assembly, optionally, the connector is a plastic connector, and the plastic connector and the silicone tubing are formed into one piece by a die-cutting process.

[0012] Optionally, in the above-mentioned infusion tubing assembly, the connector may also have a through hole that communicates with the first channel, and the through hole is used for integral molding of the silicone tubing and the connector.

[0013] In the above-mentioned infusion tubing assembly, optionally, there are multiple through holes, and the multiple through holes are spaced apart along the axial direction of the connector.

[0014] In the above-mentioned infusion tubing assembly, optionally, the connector is a silicone structure, and the silicone structure is integrally formed with the silicone tubing.

[0015] Optionally, in the above-mentioned infusion tubing assembly, the connector includes a first connector and a second connector, the infusion tubing includes a first infusion tubing and a second infusion tubing, one end of the first infusion tubing and the silicone tubing are respectively connected to both ends of the first channel of the first connector, and the other end of the second infusion tubing and the silicone tubing are respectively connected to both ends of the first channel of the second connector.

[0016] Optionally, in the above-mentioned infusion tubing assembly, the infusion tubing assembly includes a first connector and a second connector located on opposite sides of the silicone tubing;

[0017] Both the first connector and the second connector have a connecting tube and a mounting part. The silicone tube is sleeved on the connecting tube. The connecting tube and the mounting part have a third channel and a fourth channel, respectively. The two ends of the third channel are respectively connected to the silicone tube and the fourth channel.

[0018] In the above-mentioned infusion tubing assembly, optionally, a protrusion is provided on the outer side of the connecting tube; along the axial direction of the connecting tube, the protrusion has a first end and a second end disposed opposite to each other, the first end being farther away from the corresponding mounting portion relative to the second end;

[0019] The height of the second end is greater than the height of the first end.

[0020] In the above-mentioned infusion tubing assembly, optionally, the number of protrusions is multiple, and the multiple protrusions are spaced apart along the circumferential direction of the connecting tube;

[0021] And / or,

[0022] Along the radial direction of the connecting pipe, the cross-sectional shape of the protrusion is triangular.

[0023] Optionally, in the above-mentioned infusion tubing assembly, the mounting portion has a boss for corresponding to the mounting groove of the infusion device, and the boss abuts against the groove wall of the mounting groove.

[0024] Optionally, in the above-described infusion tubing assembly, the second connector has a locking hole for corresponding to the locking block of the infusion device, the locking block being located within the locking hole.

[0025] In the above-mentioned infusion tubing assembly, optionally, there are multiple locking holes, and the multiple locking holes are arranged around both sides of the fourth channel.

[0026] Optionally, the infusion tubing assembly described above may also include a retaining ring, which is fitted onto the silicone tubing and located on the side of the silicone tubing facing the first connector and / or the second connector.

[0027] Secondly, embodiments of this application also provide an infusion device, including a device body and any of the infusion tubing assemblies described in the previous application.

[0028] The infusion tubing assembly and infusion device provided in this application embodiment integrate the connector and silicone tubing into a single structure, eliminating the need for adhesive installation. This reduces assembly steps, improves the reliability of the connection between the connector and silicone tubing, and ensures production consistency.

[0029] In addition, because silicone tubing is less hard than infusion tubing, it has better rebound response characteristics and deformation repeatability under the squeezing action of the peristaltic pump in the infusion equipment, so as to ensure the infusion accuracy per unit time.

[0030] Finally, the connector and silicone tubing are integrated into one piece, allowing the connector to connect the silicone tubing to the infusion device. At this point, the first and second channels are directly connected with a smooth transition, reducing flow resistance. Compared to a design where the connector and silicone tubing are independent and snap-fitted together, this reduces shear stress at the connection point, ensuring connection stability and consequently guaranteeing the stability of the infusion device. Attached Figure Description

[0031] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0032] Figure 1 This is a schematic diagram of a first cross-sectional structure of the infusion tubing assembly provided in an embodiment of this application;

[0033] Figure 2 This is a first front view structural schematic diagram of the infusion tubing assembly provided in the embodiments of this application;

[0034] Figure 3 This is a second cross-sectional view of the infusion tubing assembly provided in an embodiment of this application;

[0035] Figure 4 A front view of the first connector of the infusion tubing assembly provided in an embodiment of this application;

[0036] Figure 5 A cross-sectional view of the first connector of the infusion tubing assembly provided in an embodiment of this application;

[0037] Figure 6 A side view of the second connector of the infusion tubing assembly provided in an embodiment of this application;

[0038] Figure 7 A front view of the second connector of the infusion tubing assembly provided in an embodiment of this application;

[0039] Figure 8 A cross-sectional view of the second connector of the infusion tubing assembly provided in an embodiment of this application;

[0040] Figure 9 A side view of the first connector of the infusion tubing assembly provided in an embodiment of this application;

[0041] Figure 10 A front view of the first connector and retaining ring of the infusion tubing assembly provided in an embodiment of this application;

[0042] Figure 11 A front view of the second connector and retaining ring of the infusion tubing assembly provided in the embodiments of this application;

[0043] Figure 12 This is a schematic diagram of the infusion device provided in an embodiment of this application.

[0044] Explanation of reference numerals in the attached figures:

[0045] 20. Infusion equipment;

[0046] 10. Infusion tubing assembly;

[0047] 100. Connector; 101. First channel; 102. Through hole;

[0048] 110. First joint;

[0049] 120. Second connector; 121. Clip hole;

[0050] 130. Connecting pipe; 131. Third channel;

[0051] 140. Installation Department; 141. Fourth Channel;

[0052] 150. Protrusion; 151. First end; 152. Second end;

[0053] 160. Boss;

[0054] 200. Silicone tubing; 201. Second channel;

[0055] 300. Infusion tubing; 310. First infusion tubing; 320. Second infusion tubing;

[0056] 400, Card Circle.

[0057] The accompanying drawings have illustrated specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to specific embodiments. Detailed Implementation

[0058] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0059] Reference Figure 1 , Figure 2 as well as Figure 3 In a first aspect, embodiments of this application provide an infusion tubing assembly 10, applied to an infusion device 20. The infusion tubing assembly 10 includes a connector 100, a silicone tube 200, and an infusion tubing 300.

[0060] Understandably, connector 100 is used to connect the fluid passage between infusion tubing 300 and silicone tubing 200. Infusion tubing 300 is used to transport liquid, and silicone tubing 200 is squeezed by the peristaltic structure of the infusion pump to drive the liquid through infusion tubing 300 and connector 100 into silicone tubing 200, and then flow to the target location.

[0061] Both silicone tubing 200 and infusion tubing 300 are used to transport fluids. The difference lies in the structure: silicone tubing 200 corresponds to the peristaltic structure of the infusion pump. The infusion pump uses this peristaltic structure to compress the silicone tubing, allowing the liquid inside to flow and thus enabling infusion. Infusion tubing 300 connects to silicone tubing 200 via connector 100, providing structural support for both silicone tubing 200 and connector 100 to ensure unobstructed and stable flow within the infusion pump.

[0062] Therefore, in this application, the connector 100 is located between the silicone tube 200 and the infusion tube 300. The liquid enters the silicone tube 200 through the infusion tube 300 and the connector 100, and flows out from the silicone tube 200.

[0063] Reference Figure 1 , Figure 2 as well as Figure 3 Specifically, the connector 100 has a first channel 101 for liquid flow inside. The infusion tube 300 is used to connect to one end of the first channel 101. The silicone tube 200 has a second channel 201 for liquid flow inside, and the second channel 201 is connected to the other end of the first channel 101.

[0064] It should be noted that the first channel 101 can be a hollow channel penetrating both ends of the connector 100, and the axial extension direction of the first channel 101 is consistent with the infusion flow direction. The cross-sectional shape of the first channel 101 can be circular, elliptical, or racetrack-shaped, and its size can be set according to the outer diameter of the compatible infusion tube 300. For example, the inner diameter of the first channel 101 can be 2.0mm-4.0mm, and the wall thickness can be 0.5mm-1.2mm.

[0065] In addition, the silicone tube 200 can be made of medical-grade liquid silicone. It is understood that the second channel 201 of the silicone tube 200 is coaxially connected to the first channel 101, with a smooth transition at the connection point and a radius of curvature of not less than 0.2 mm, to avoid liquid turbulence and bubble accumulation.

[0066] It should be noted that the inner diameter of the silicone tube 200 can be 2.2mm-4.2mm, the outer diameter is 3.0mm-5.0mm, and the wall thickness is 0.4mm-0.9mm. The length of the silicone tube 200 can be set according to the internal space layout of the infusion device 20, and will not be specifically set here.

[0067] In some embodiments, the hardness of the silicone tube 200 is lower than that of the infusion tube 300. It is understood that the infusion tube 300 can be a plastic tube or the silicone tube 200, as long as the hardness of the infusion tube 300 is higher than that of the silicone tube 200.

[0068] It should be noted that, as described above, the silicone tube 200 is compressed by the drive structure of the infusion pump to drive the liquid flow. Therefore, the hardness angle of the silicone tube 200 is...

[0069] The infusion tubing 300 needs to provide structural support to prevent deformation. Therefore, the infusion tubing 300 needs to have a certain degree of rigidity to ensure the smooth flow and stability of the tubing inside the infusion pump.

[0070] In some embodiments, the connector 100 and the silicone tube 200 are integrally formed, so that the connector 100 connects the silicone tube 200 and the infusion device 20. It is understood that the manner in which the connector 100 and the silicone tube 200 are integrally formed can be varied. For example, the connector 100 and the silicone tube 200 can be integrally formed by silicone injection molding or by a die-casting process.

[0071] With the above configuration, the connector 100 and the silicone tube 200 are integrated into one structure, eliminating the need for adhesive installation. This reduces assembly steps, improves the reliability of the connection between the connector 100 and the silicone tube 200, and ensures production consistency.

[0072] In addition, since the hardness of the silicone tube 200 is lower than that of the infusion tube 300, under the action of the peristaltic pump of the infusion device 20, the silicone tube 200 has better rebound response characteristics and deformation repeatability, so as to ensure the infusion accuracy per unit time.

[0073] Finally, the connector 100 and the silicone tube 200 are integrated into one piece, so that the connector 100 connects the silicone tube 200 to the infusion device 20. At this time, the first channel 101 and the second channel 201 are directly connected and the transition is smooth, which can reduce flow resistance. Compared with the solution where the connector 100 and the silicone tube 200 are independent and snap-fit ​​connected, the shear stress at the connection point can be reduced, ensuring the stability of the connection.

[0074] As an optional implementation, the connector 100 is a plastic connector 100, and the plastic connector 100 and the silicone tube 200 are formed into one piece by a die-cutting process.

[0075] Understandably, the plastic connector 100 can be a structural component made of thermoplastic or thermosetting plastic, such as one or more of polypropylene (PP), polycarbonate (PC), polyethylene terephthalate (PET), or polyetheretherketone (PEEK).

[0076] It should be noted that the material of connector 100 must meet the requirements for biocompatibility, chemical corrosion resistance, mechanical strength, and compatibility with injection molding processes. All of the above materials meet these requirements.

[0077] In addition, the hardness of the above-mentioned materials is higher than that of silicone, that is, the hardness of the plastic connector 100 is higher than that of the silicone connector 100, so as to provide rigid support and connection interface positioning function.

[0078] It is understood that the shape, size and internal channel structure of the plastic connector 100 can be set according to the interface size and fluid dynamics requirements of the infusion device 20. For example, the inner diameter of its first channel 101 can be 2.0mm-4.0mm and the length can be 8mm-15mm. The above values ​​are just examples and are not limited in this application embodiment.

[0079] It should be noted that the "insert molding" process refers to the insert molding process, which specifically includes the following steps: First, a plastic connector 100 is prepared by one-time injection molding, and after demolding, it is cleaned and surface activated; then, the plastic connector 100 is placed as an insert into the cavity of a secondary injection mold, the cavity contour of which corresponds to the coverage area of ​​the silicone tube 200 and the second end 152 of the connector 100; then, liquid silicone rubber (LSR) is injected into the mold, and the liquid silicone flows and fills the mold cavity under high temperature and high pressure conditions, while penetrating into the micropores, grooves or through holes on the surface of the plastic connector 100; finally, after vulcanization, curing, cooling and demolding, an infusion tube assembly 10 integrally formed by the plastic connector 100 and the silicone tube 200 is obtained.

[0080] The parameters such as injection temperature and vulcanization time in the die-casting process can be adjusted according to the selected silicone grade and the structural complexity of the connector 100. This application embodiment does not impose any special limitations on this.

[0081] The infusion tubing assembly 10 provided in this embodiment integrates a plastic connector 100 and a silicone tubing 200 using a die-cutting process. This allows the liquid silicone to partially penetrate the surface or through-holes of the plastic connector 100 during curing, forming a tight connection. Furthermore, the interfacial bonding strength between the silicone molecules and the plastic substrate surface is higher than that achieved through adhesives, enabling it to withstand higher infusion pressures.

[0082] As an optional implementation, the connector 100 also has a through hole 102, which communicates with the first channel 101. The through hole 102 is used for the silicone tube 200 and the connector 100 to be integrally formed.

[0083] Reference Figure 1 As an optional implementation, the connector 100 includes a first connector 110 and a second connector 120, and the infusion tube 300 includes a first infusion tube 310 and a second infusion tube 320. One end of the first infusion tube 310 and the silicone tube 200 are respectively connected to the two ends of the first channel 101 of the first connector 110, and the other end of the second infusion tube 320 and the silicone tube 200 are respectively connected to the two ends of the first channel 101 of the second connector 120.

[0084] The silicone tube 200 is provided with a first connector 110 and a second connector 120 on both sides. The first connector 110 is used to connect the first infusion tube 310 and the silicone tube 200, and the second connector 120 is used to connect the second infusion tube 320 and the silicone tube 200.

[0085] With the above configuration, the first infusion tube 310 and the second infusion tube 320 distributed on both sides correspond to the inflow and outflow positions of the liquid, respectively, and are connected to both sides of the silicone tube 200 through the connector 100 to fix the silicone tube 200.

[0086] Reference Figure 4 , Figure 7 As an optional implementation, the infusion tubing assembly 10 includes a first connector 110 and a second connector 120 located on opposite sides of the silicone tubing 200. Both the first connector 110 and the second connector 120 have through holes 102.

[0087] It is understandable that the through hole 102 penetrates the wall thickness of the connector 100, with one end opening into the inner wall of the first channel 101 and the other end opening into the outer peripheral surface of the connector 100, and located in the outer peripheral area of ​​the end of the connector 100 used to connect the silicone tube 200.

[0088] In some embodiments, the number of through holes 102 is at least one. The shape of the through holes 102 can be circular, elliptical, elongated, or rectangular. The size and distribution of the through holes 102 can be adapted according to the mold flow channel design. This application embodiment does not impose any special limitations in this regard.

[0089] It should be noted that the through hole 102 is disposed on the downstream side wall of the first channel 101 along the axial direction of the connector 100. In this way, during the die-casting process, liquid silicone can flow from the inside of the first channel 101 to the outside through the through hole 102, and simultaneously fill the space between the outer peripheral surface of the connector 100 and the molding cavity of the silicone tube 200, thereby forming a continuous and through silicone body among the inner channel surface, the inner wall of the through hole 102 and the outer peripheral surface of the connector 100.

[0090] With the above settings, the through hole 102 can serve as an exhaust channel during the die-casting process, which helps to expel the trapped air in the mold cavity, reduce air bubbles and material shortage defects, and improve the uniformity of silicone filling and the density of interface bonding.

[0091] Furthermore, after the silicone has cured, the silicone at the through-hole 102 can penetrate the body of the plastic connector 100, forming a mutually nested and fixed structure between the silicone tube 200 and the plastic connector 100. This enhances the bonding strength and prevents delamination, slippage, or sealing failure after long-term use. In addition, the above structure achieves a relatively reliable integrated connection without the need for adhesives or interference fits, solving the technical problem of delamination between the plastic connector 100 and the silicone tube 200 due to long-term use, thereby improving the stability and safety of the infusion tubing assembly 10.

[0092] As an optional implementation, there are multiple through holes 102, which are spaced apart along the axial direction of the connector 100.

[0093] It is understood that the through hole 102 is a hole structure that penetrates the wall thickness of the connector 100, and the number of them is two or more; for example, it can be 2, 3, 4 or 5, and the embodiments of this application do not make any special limitation on this.

[0094] Specifically, multiple through holes 102 are spaced apart along the axial direction of the connector 100. It is understood that the axial spacing between two adjacent through holes 102 can be set according to process requirements, for example, 0.5 mm to 3 mm, or distributed proportionally according to the length of the connector 100, so that the silicone forms multiple connection points in the axial extension area of ​​the second end 152 of the connector 100 to enhance the connection strength.

[0095] It should be noted that the cross-sectional shape of the through hole 102 can be arbitrary, such as circular, elliptical, elongated, or racetrack-shaped. This application embodiment does not limit this.

[0096] Through the above configuration, multiple through holes 102 can form multiple through channels, allowing the liquid silicone to fill the outer peripheral surface of the connector 100 during the curing process and cover the internal channels and outer peripheral coating of the connector 100, thereby creating multiple connection positions at different axial locations. The multiple connection positions enhance the tensile and shear strength of the interface between the silicone and the connector 100, improving the structural stability and reliability of the infusion tubing assembly 10.

[0097] As another alternative implementation, the connector 100 is a silicone structure, which is integrally formed with the silicone tube 200.

[0098] Understandably, the silicone structure has a first channel 101 formed inside for liquid flow, one end of which is connected to the infusion tube 300 of the infusion device 20. The silicone tube 200 has a second channel 201 formed inside for liquid flow, which is connected to the other end of the first channel 101. The silicone structure and the silicone tube 200 are made of the same material, medical-grade liquid silicone rubber (LSR), which can be obtained through a single injection molding process.

[0099] It should be noted that the silicone structure is precisely shaped by the mold during the molding process and has the same functional structure as the aforementioned plastic connector 100, including: an axially penetrating first channel 101, an inlet end for connecting the infusion tube 300, an outlet end for connecting the silicone tube 200, and an installation part 140 provided on the outer periphery, etc.

[0100] As an alternative implementation, the silicone structure and silicone tube 200 are integrally molded. Compared to the method in related technologies where the connector 100 and silicone tube 200 are connected by adhesive, no adhesive is needed between the silicone structure and silicone tube 200, resulting in a continuous and relatively uniform silicone structure. This method can reduce the number of steps in the manufacturing process, reduce the possibility of strength reduction caused by separate connections, and thus prevent liquid penetration.

[0101] It is understood that the external dimensions, channel diameter, wall thickness, and profile of the mounting portion 140 of the silicone structure can all be set according to the interface standard of the infusion device 20 and the requirements of fluid dynamics. This application does not impose specific limitations on the embodiments herein.

[0102] In other alternative implementations, the silicone structure may integrate a detection structure.

[0103] Through the above-described configuration, this embodiment of the application avoids the difference in thermal expansion coefficients caused by different materials by using liquid silicone in a one-time molding process, thereby preventing stress concentration at the connection points. Furthermore, no adhesive is required between the silicone structure and the silicone tube 200, which improves the reliability of the seal.

[0104] As an optional implementation, when the infusion tubing assembly 10 includes a first connector 110 and a second connector 120 located on opposite sides of the silicone tubing 200, refer to... Figure 4 , Figure 7 Both the first connector 110 and the second connector 120 have a connecting tube 130 and a mounting part 140, and the silicone tube 200 is sleeved on the connecting tube 130.

[0105] Reference Figure 5 , Figure 8 Specifically, the connecting pipe 130 and the mounting part 140 respectively have a third channel 131 and a fourth channel 141, and the two ends of the third channel 131 are respectively connected to the silicone tube 200 and the fourth channel 141.

[0106] As described above, the first connector 110 corresponds to the input side of the infusion pump, and the second connector 120 corresponds to the output side of the infusion pump. The first connector 110 is connected to the first infusion tube 310, and the second connector 120 is connected to the second infusion tube 320. That is, both the first infusion tube 310 and the second infusion tube 320 are connected to the fourth channel 141.

[0107] In some embodiments, the connecting tube 130 can be a hollow cylindrical structure extending axially. The outer diameter of the connecting tube 130 matches the inner diameter of the silicone tube 200, so that the silicone tube 200 can be fixed to the outer periphery of the connecting tube 130 by interference fit or elastic deformation sleeve.

[0108] Understandably, the connecting tube 130 can be made of plastic (such as polypropylene PP, polycarbonate PC) or silicone. The connecting tube 130 has a higher rigidity than the silicone tube 200 to provide structural support.

[0109] It should be noted that the mounting part 140 and the connecting pipe 130 can be coaxially connected to cooperate with the mounting structure of the infusion device 20.

[0110] In some embodiments, the third channel 131 can be an axial channel passing through both ends of the connecting tube 130, and the cross-sectional shape of the third channel 131 can be circular, elliptical, or polygonal. One end of the third channel 131 communicates with the second channel 201 of the silicone tube 200, and the other end communicates with the fourth channel 141 of the mounting portion 140. The fourth channel 141 can also be a channel passing through the mounting portion 140, and its extension direction can be axial, oblique, or bent to adapt to the flow channel interface of the infusion tube 300.

[0111] As can be seen from the foregoing, the connector 100 has a first channel 101, and the third channel 131 and the fourth channel 141 in this embodiment can be used in conjunction with the first channel 101.

[0112] As can be seen from the above, when the two ends of the silicone tube 200 are respectively fitted onto the connecting tube 130 of the first connector 110 and the second connector 120, the liquid flows sequentially through the second infusion tube 320, the fourth channel 141 and the third channel 131 of the second connector 120, the second channel 201 of the silicone tube 200, the third channel 131 and the fourth channel 141 of the first connector 110, and the first infusion tube 310, forming a complete flow path.

[0113] In the above process, the connecting pipe 130 can provide mechanical support and positioning reference, the mounting part 140 is used to realize structural docking and functional interaction with the infusion device 20, and the connection between the third channel 131 and the fourth channel 141 can ensure the continuity of fluid flow and the stability of fluid pressure. In addition, the first connector 110 and the second connector 120 do not require additional connectors or adhesives, which can improve assembly efficiency and reduce manufacturing costs.

[0114] Reference Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 as well as Figure 9 As an optional implementation, the outer side of the connecting pipe 130 is provided with a protrusion 150.

[0115] It is understood that the protrusion 150 can be an annular or segmented bulge provided along the outer circumferential surface of the connecting pipe 130. The cross-sectional shape of the protrusion 150 can be triangular, trapezoidal, arc-shaped, serrated, or wedge-shaped. In this embodiment, it can be triangular to provide a unidirectional limiting function.

[0116] In some embodiments, the material of the protrusion 150 is the same as that of the connecting tube 130. That is, when the connecting tube 130 is made of plastic, the protrusion 150 and the connecting tube 130 are integrally injection molded; when the connecting tube 130 is made of silicone, the protrusion 150, the silicone tube 200, and the connecting tube 130 are vulcanized or molded simultaneously.

[0117] Reference Figure 4 , Figure 5 , Figure 7 as well as Figure 8 Along the axial direction of the connecting pipe 130, the protrusion 150 has a first end 151 and a second end 152 disposed opposite to each other, with the first end 151 being farther away from the corresponding mounting portion 140 relative to the second end 152. The height of the second end 152 is greater than the height of the first end 151.

[0118] It should be noted that the first end 151 can be the end of the protrusion 150 near the mounting portion 140, and the second end 152 can be the end of the protrusion 150 away from the mounting portion 140. The height of the second end 152 is greater than the height of the first end 151, so that the protrusion 150 is inclined towards the mounting portion 140. The inclination direction is opposite to the slippage direction of the silicone tube 200 under axial tension. That is, when the silicone tube 200 is subjected to an external force and attempts to slide away from the mounting portion 140 along the axial direction of the connecting tube 130 (i.e., towards the first end 151), the slope of the sloping protrusion 150 can cause the silicone to elastically deform and engage with the root of the protrusion 150. At this time, the second end 152 forms a barrier to prevent displacement and achieve anti-slip.

[0119] It should be noted that the height difference of the protrusion 150 (i.e., the height difference between the second end 152 and the first end 151) can be set according to the actual required anti-slip level, the wall thickness and hardness of the silicone tube 200, and the outer diameter of the connecting tube 130. This embodiment does not impose any special limitations on this. Furthermore, the axial length of the protrusion 150 (i.e., the axial distance between the first end 151 and the second end 152) can be set according to the insertion depth of the silicone tube 200. In addition, this embodiment does not limit parameters such as surface roughness, axial length, and fillet radius.

[0120] With the above settings, when the silicone tube 200 is sleeved on the connecting tube 130, if the silicone tube 200 undergoes axial displacement, the protrusion 150 can guide the silicone to deform and embed into the bottom of the protrusion 150, so that the second end 152 forms a stop, thereby forming a lock, which can prevent the silicone tube 200 from slipping towards the first end 151, thereby improving the connection stability and safety of use of the infusion tube assembly 10.

[0121] As an alternative implementation, the number of protrusions 150 is multiple.

[0122] It is understood that the spacing angle, number and arrangement of the multiple protrusions 150 can be set according to the actual assembly force, the wall thickness of the silicone tube 200, the elastic modulus of the material and the required axial anti-slip force; for example, there can be 3, 4, 6 or 8, and this application embodiment does not make any special limitation on this.

[0123] In some embodiments, a plurality of protrusions 150 are spaced apart along the circumferential direction of the connecting pipe 130 to form an annularly distributed resistance around the outer periphery of the connecting pipe 130. The plurality of protrusions 150 may be arranged at uniform or non-uniform intervals.

[0124] In some embodiments, the cross-sectional shape of the protrusion 150 is triangular along the radial direction of the connecting pipe 130.

[0125] Understandably, the triangle has a hypotenuse and a right-angled side. The hypotenuse can face the input side of the silicone tube 200 to provide guidance and deformation space during the insertion of the silicone tube 200. The right-angled side can face the output side of the silicone tube 200 to provide resistance when the silicone tube 200 is subjected to axial tension.

[0126] It should be noted that the angle of the apex of the triangle can be set according to the hardness of the silicone material, for example, it can be 30°, 45° or 60°, and this application embodiment does not make any special limitation on this.

[0127] With the above configuration, after the silicone tube 200 is fitted onto the connecting tube 130 and cured by the molding process, the multiple circumferentially spaced triangular protrusions 150 can form a continuous and balanced connection. During the silicone coating process, the triangular cross-section of the protrusion 150 generates local stress concentration, prompting the liquid silicone to fill the root and sides of the protrusion 150, forming a micromechanical interlocking structure after curing. When the silicone tube 200 is subjected to axial tensile force, the right-angled sides of each protrusion 150 together form a multi-point reverse limiting surface, significantly improving the overall anti-slip reliability and avoiding localized tearing of the silicone due to single-point stress concentration.

[0128] Reference Figure 4 , Figure 6 , Figure 7 as well as Figure 9As an optional implementation, the mounting part 140 has a boss 160, which is used to correspond to the mounting groove of the infusion device 20, and the boss 160 abuts against the groove wall of the mounting groove.

[0129] It is understood that the mounting part 140 is a structural component of the first connector 110 or the second connector 120, and is used to cooperate with the mounting structure of the infusion device 20.

[0130] It should be noted that the boss 160 is provided on the outer surface of the mounting portion 140. The boss 160 can be a columnar structure with a cross-sectional shape that is circular, elliptical, rectangular, or polygonal. It is understood that the specific shape of the boss 160 can be set according to the groove outline of the mounting groove of the infusion device 20, for example, it can be a circular columnar protrusion 150 or a long strip protrusion. This embodiment of the application does not impose any special limitations on this.

[0131] It should be noted that the height of the boss 160 is set according to the actual assembly clearance and positioning accuracy requirements, for example, 0.3mm-1.5mm.

[0132] Understandably, the dimensions of the boss 160 need to be sufficient to fully embed into the mounting groove and form surface or line contact with the groove wall. When the boss 160 abuts against the groove wall, the aforementioned contact can provide normal support force to prevent the infusion tubing assembly 10 from shaking or shifting during the operation of the infusion pump.

[0133] It should be noted that the number of bosses 160 can be one or more. For example, when there are multiple bosses 160, the multiple bosses 160 can be evenly distributed along the circumference of the mounting portion 140.

[0134] It is understandable that the material of the boss 160 is the same as that of the mounting part 140. When the mounting part 140 is made of plastic, the boss 160 and the mounting part 140 can be injection molded. When the mounting part 140 is made of silicone, the boss 160 can be liquid silicone and can be integrally vulcanized.

[0135] It should be noted that, in addition to its mechanical positioning function, boss 160 can also be used as a triggering structure.

[0136] For example, after the infusion tubing assembly 10 is fully installed into the infusion device 20, the boss 160 is deformed under pressure or directly pushes the microswitch at the bottom of the mounting groove, generating an installed electrical signal for the main control unit of the infusion device 20 to recognize and start the peristaltic pump. It is understood that the above function can be completed without the need for sensors or electronic components.

[0137] By integrating a boss 160 into the mounting section 140, the boss 160 mates with the mounting groove of the infusion device 20. This prevents the infusion tubing assembly 10 from shifting position and ensures the stability of the silicone tubing 200 within the peristaltic wheel's action area. Furthermore, by triggering a contact signal, the automated identification capability and operational safety of the infusion device 20 are enhanced.

[0138] Reference Figure 4 , Figure 7 As an optional implementation, the second connector 120 is larger than the first connector 110.

[0139] It should be noted that the first connector 110 is used to connect to the upstream infusion tube 300 section of the infusion device 20, and the second connector 120 is used to connect to the downstream infusion tube 300 section or the pump outlet side.

[0140] It is understandable that the dimensional difference between the first connector 110 and the second connector 120 can be reflected in the difference in axial length or radial length.

[0141] By setting a size difference between the first connector 110 and the second connector 120, it is easier for users to distinguish between the first connector 110 and the second connector 120. This allows users to determine the installation position of any connector 100 upon contact, thereby improving the installation efficiency of the infusion tubing assembly 10.

[0142] With the above setup, operators can quickly confirm the installation orientation of the silicone tubing 200 in a sterile environment through intuitive visual comparison or tactile feedback during blind operation, without relying on text labels, color markings, or additional tools. Furthermore, the aforementioned dimensional differences directly affect key structural parts of the human-machine interface (such as the mounting section 140 and the boss 160), ensuring stable and reliable identification that is less affected by liquid contamination, lighting conditions, or the wearing of gloves, thereby effectively reducing clinical risks such as incorrect infusion pathways, abnormal flow rates, or equipment alarms caused by reverse installation of the infusion tubing assembly 10.

[0143] Reference Figure 7 , Figure 8 As an optional implementation, the second connector 120 has a locking hole 121 for corresponding to a locking block of the infusion device 20, the locking block being located within the locking hole 121. For example, the locking hole 121 may be provided on the mounting portion 140 of the first connector 110.

[0144] It should be noted that the size is adapted to the shape of the card block provided in the infusion device 20 so that the card block can slide in along the insertion direction and be stably embedded in the card hole 121. For example, the shape of the card hole 121 can be circular, rectangular, or oblong, etc. The specific shape of the card hole 121 is not limited in this application embodiment, nor is it limited to the above example.

[0145] Understandably, the inner surface of the card hole 121 can be smooth, or it can be provided with tiny depressions or textures to enhance the friction between it and the card block.

[0146] With the above configuration, when the second connector 120 is inserted into the infusion device 20, the locking block on the infusion device 20 slides into the locking hole 121 along the guide slope, and the locking block is fully embedded in the locking hole 121, forming a double limit in both the axial and radial directions. The above fit can remain stable under normal operating force or slight vibration, and can only be released when a tripping force in a specific direction is applied (such as pressing the release button), thereby effectively preventing the infusion tubing assembly 10 from accidentally falling off during use and improving the safety and reliability of clinical use.

[0147] In an optional embodiment, the mounting portion 140 of the second connector 120 integrates a locking hole 121 and a boss 160, while the mounting portion 140 of the first connector 110 only has a boss 160, thus creating a difference. This difference can further enhance identifiability and avoid the risk of misjudgment due to relying on only a single dimension.

[0148] As an optional implementation, there are multiple slots 121, which are arranged around both sides of the fourth channel 141.

[0149] For example, one locking hole 121 is provided on the left side and one locking hole 121 is provided on the right side of the fourth channel 141, forming a pair of symmetrical locking holes 121. Another example is that two locking holes 121 are provided on the left side and two locking holes 121 are provided on the right side of the fourth channel 141, forming two pairs of symmetrical locking holes 121. Yet another example is that three or four locking holes 121 are arranged at 120° or 90° intervals in the circumferential direction of the fourth channel 141 to adapt to the locking block layout of different models of infusion devices 20.

[0150] It is understood that the specific number, position and arrangement angle of the card holes 121 can be designed according to actual assembly requirements and load-bearing requirements, and the embodiments of this application do not impose special limitations on this.

[0151] The following are examples:

[0152] In one alternative embodiment, at least two of the multiple locking holes 121 are located directly to the left and right of the center line of the fourth channel 141, respectively, and are mirror-symmetrical about the center line of the fourth channel 141. This arrangement ensures balanced force on the left and right locking blocks during insertion and removal, preventing the first connector 110 from deflecting or tilting, thereby improving connection rigidity and stability during repeated insertion and removal.

[0153] In another alternative embodiment, the multiple card holes 121 are unevenly distributed around both sides of the fourth channel 141. For example, two card holes 121 are provided on one side and one card hole 121 is provided on the other side. This asymmetrical card block layout is used to achieve the foolproof identification function and prevent reverse installation.

[0154] With the above arrangement, multiple locking holes 121 are arranged around both sides of the fourth channel 141, allowing multiple locking blocks of the infusion device 20 to be synchronously and symmetrically embedded into the first connector 110, forming multi-point constraints. Furthermore, during axial insertion / removal and use, each locking hole 121 can share the locking load, reducing the risk of stress concentration at a single point. Secondly, the locking holes 121 arranged around the fourth channel 141 enhance torsional resistance, effectively suppressing rotational displacement of the first connector 110 around the axis of the fourth channel 141, thereby improving the long-term stability, installation consistency, and reliability of repeated use of the locking structure.

[0155] Reference Figure 10 , Figure 11 As an optional implementation, the infusion tubing assembly 10 also includes a retaining ring 400, which can be disposed on the side of the silicone tubing 200 facing the connector 100.

[0156] Understandably, the retaining ring 400 can be set at the connection between the silicone tube 200 and the connector 100 to restrict the axial movement of the silicone tube 200 and improve stability.

[0157] Specifically, the inner diameter of the retaining ring 400 can be larger than the outer diameter of the silicone tube 200 to facilitate the installation of the retaining ring 400. The retaining ring 400 and the silicone tube 200 can be fixed by interference fit to improve stability. At the same time, the tapered surface of the connector 100 facilitates the insertion of the connector 100 into the silicone tube 200.

[0158] When both the first connector 110 and the second connector 120 have a connecting pipe 130 and a mounting part 140, the silicone tube 200 is sleeved on the connecting pipe 130, and then the retaining ring 400 is sleeved on the silicone tube 200. Since the connecting pipe 130 has a protrusion 150 on the outside, the silicone tube 200 is tightened on both sides of the protrusion 150, making it difficult for the silicone tube 200 to fall off. At the same time, the retaining ring 400 restricts the movement of the silicone tube 200, thus increasing the stability of the silicone tube 200 under long-term and high-pressure infusion.

[0159] It should be noted that there can be multiple 400-gauge rings.

[0160] For example, when the infusion tubing assembly 10 includes a first connector 110 and a second connector 120, both the first connector 110 and the second connector 120 may be provided with a retaining ring 400, or only the first connector 110 or the second connector 120 may be provided with a retaining ring 400.

[0161] It is understood that when the connector 100 includes the first connector 110 and the second connector 120, the retaining ring 400 may be located on the side of the silicone tube 200 facing the first connector 110 and / or the second connector 120 to enhance the connection strength between the silicone tube 200 and the first connector 110 and / or the second connector 120.

[0162] It should be noted that the retaining ring 400 can be a one-piece structure or two half-tube structures. The two half-tube structures are joined together to form a tube, thereby fixing the silicone tube 200.

[0163] Reference Figure 12 Secondly, embodiments of this application also provide an infusion device 20, which includes a device body 21 and the aforementioned infusion tubing assembly 10.

[0164] In some embodiments, the main body 21 of the device is provided with a mounting cavity 22 for mounting the infusion tubing assembly 10. The mounting cavity 22 is provided with a mounting groove, a locking block, a micro switch contact and a limiting structure adapted to the infusion tubing assembly 10.

[0165] Specifically, the mounting groove wall is provided with a guide slope and a positioning groove. A locking block is provided on one side wall of the mounting groove for embedding into the locking hole 121 of the first connector 110 or the second connector 120 in the infusion tubing assembly 10. A microswitch contact is correspondingly provided at the bottom of the mounting cavity 22 for abutting against the boss 160 on the mounting part 140 in the infusion tubing assembly 10 to detect whether the infusion tubing assembly 10 is in place and output an installation status signal. The limiting structure includes a lateral stop block and an end face limiting surface for constraining the radial and axial degrees of freedom of the infusion tubing assembly 10 in the mounting cavity 22.

[0166] It should be noted that the dimensions of the mounting cavity 22 of the main body 21 match the outer contour of the infusion tubing assembly 10, so that when the infusion tubing assembly 10 is inserted into the mounting cavity 22, the mounting portions 140 of the first connector 110 and the second connector 120 can be respectively embedded into the corresponding mounting grooves. The boss 160 forms mechanical contact with the micro switch contact, the locking hole 121 completes elastic engagement with the locking block, and the mounting portion 140 cooperates with the guide slope and positioning groove of the mounting groove to achieve circumferential positioning and prevent incorrect installation. The main body 21 establishes a communication connection with the conductive structure (if any) in the infusion tubing assembly 10 through the electrical connection interface in the mounting cavity 22 to transmit installation status, tubing type identification information and abnormal alarm signals.

[0167] Through the above settings, the main body 21 of the equipment completes high-precision positioning and locking through the multi-point cooperation between the mounting cavity 22 and the infusion tube assembly 10; at the same time, with the integrated design of the silicone tube 200 and the connector 100, the weak points of the traditional pipeline connection are eliminated, so that the whole equipment maintains the integrity of the stable fluid passage during long-term operation.

[0168] In the description of this invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the drawings, and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0169] In the description of this invention, it should be understood that the terms “comprising” and “having” as used herein, and any variations thereof, are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0170] Unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can be a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features.

[0171] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An infusion tubing assembly, characterized in that, The infusion tubing assembly, used in infusion devices, includes: The connector has an internal channel for liquid flow. An infusion tube is used to connect to one end of the first channel; The silicone tube has a second channel formed inside for liquid flow, and the second channel is connected to the other end of the first channel. The hardness of the silicone tube is lower than that of the infusion tube. The connector and the silicone tube are integrated into one piece, so that the connector connects the silicone tube to the infusion device.

2. The infusion tubing assembly according to claim 1, characterized in that, The connector is a plastic connector, and the plastic connector and the silicone tube are formed into one piece by a die-cutting process.

3. The infusion tubing assembly according to claim 2, characterized in that, The connector also has a through hole that communicates with the first channel, and the through hole is used for the silicone tube and the connector to be integrally formed.

4. The infusion tubing assembly according to claim 3, characterized in that, The number of through holes is multiple, and the multiple through holes are spaced apart along the axial direction of the joint.

5. The infusion tubing assembly according to claim 1, characterized in that, The connector is a silicone structure, which is integrally formed with the silicone tube.

6. The infusion tubing assembly according to any one of claims 1-5, characterized in that, The connector includes a first connector and a second connector, and the infusion tubing includes a first infusion tubing and a second infusion tubing. One end of the first infusion tubing and the silicone tubing are respectively connected to both ends of the first channel of the first connector, and the other end of the second infusion tubing and the silicone tubing are respectively connected to both ends of the first channel of the second connector.

7. The infusion tubing assembly according to any one of claims 1-5, characterized in that, The infusion tubing assembly includes a first connector and a second connector located on opposite sides of the silicone tube. Both the first connector and the second connector have a connecting tube and a mounting part. The silicone tube is sleeved on the connecting tube. The connecting tube and the mounting part have a third channel and a fourth channel, respectively. The two ends of the third channel are respectively connected to the silicone tube and the fourth channel.

8. The infusion tubing assembly according to claim 7, characterized in that, The outer side of the connecting pipe is provided with a protrusion; along the axial direction of the connecting pipe, the protrusion has a first end and a second end that are disposed opposite to each other, with the first end being farther away from the corresponding mounting part relative to the second end; The height of the second end is greater than the height of the first end.

9. The infusion tubing assembly according to claim 8, characterized in that, The number of protrusions is multiple, and the multiple protrusions are spaced apart along the circumferential direction of the connecting pipe; And / or, Along the radial direction of the connecting pipe, the cross-sectional shape of the protrusion is triangular.

10. The infusion tubing assembly according to claim 7, characterized in that, The mounting part has a boss, which is used to correspond to the mounting groove of the infusion device, and the boss abuts against the groove wall of the mounting groove.

11. The infusion tubing assembly according to claim 7, characterized in that, The second connector has a locking hole for corresponding to the locking block of the infusion device, the locking block being located within the locking hole.

12. The infusion tubing assembly according to claim 11, characterized in that, The number of the card holes is multiple, and the multiple card holes are arranged around both sides of the fourth channel.

13. The infusion tubing assembly according to claim 7, characterized in that, It also includes a retaining ring, which is fitted onto the silicone tube and located on the side of the silicone tube facing the first connector and / or the second connector.

14. An infusion device, characterized in that, It includes the main body of the device and the infusion tubing assembly as described in any one of claims 1-13.

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