Self-locking conduit joint

Abstract

The self-locking catheter connector is used for assembling a catheter for anesthesia and comprises a connector body, and the connector body comprises a pipe connecting end and an infusion end which are connected to form an integrated structure; the pipe connecting end is used for being connected with a guide pipe, an elastic piece with a guide pipe inserting mounting hole is connected in the pipe connecting end, and the tail end of the mounting hole can limit the end face of the guide pipe. The infusion end is used for being connected with an infusion apparatus and provided with an infusion cavity connected with the infusion apparatus. The infusion cavity is communicated with the mounting hole; a locking assembly used for abutting against the periphery of the guide pipe is arranged in at least partial area of the inner wall of the mounting hole in the axis direction, and the locking assembly can abut against the outer wall of the guide pipe to lock the guide pipe; when the tail end of the guide pipe is inserted into the tail end of the mounting hole, the guide pipe can be positioned, and the insertion can be realized; and the phenomena of blockage and flattening of the catheter caused by twisting of the elastic piece are avoided.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of catheter assembly, and particularly relates to a self-locking catheter joint. BACKGROUND

[0002] Generally, a catheter joint is arranged at one end of a catheter, facilitating assembly with an infusion device or an injection device to deliver a medicinal liquid into the catheter. However, a large-size catheter joint is bonded or welded to the catheter before leaving the factory; and a small-size or micro catheter cannot be welded or bonded with a catheter joint before leaving the factory, for example, an anesthetic catheter for epidural nerve block, which has an outer diameter generally not exceeding 1 mm. Since the anesthetic catheter is particularly soft and has no sharp head end, it needs to pass through the needle cavity of an epidural needle to enter the epidural space. After the anesthetic catheter is in place, the epidural needle is withdrawn from the anesthetic catheter, and then a catheter joint is connected to the end of the anesthetic catheter by a medical staff, and the infusion device or other medicinal injection device is connected through the catheter joint.

[0003] The catheter joint generally wraps the catheter with an elastic member, that is, the catheter is inserted into the inner cavity of the elastic member, and the elastic member is axially extruded by the rotating force generated by the medical staff when manually connecting the catheter joint, so that the inner diameter of the cylindrical elastic member is reduced to wrap the catheter. Therefore, in order to facilitate the medical staff to manually operate the catheter joint, the inner cavity of the elastic member is generally made relatively large, and the medical staff needs to rotate several turns to reduce the inner diameter of the elastic member during the specific operation. Moreover, due to different operating forces and speeds of the medical staff, the cylindrical elastic member is twisted at least in a local area, and suddenly becomes thin, thereby causing the catheter located inside the elastic member to be locally clamped or even blocked. During the radial compression of the elastic member, the extrusion distance is short, and the catheter cannot be locked.

[0004] Therefore, in order to achieve both non-blocking and effective locking of the catheter, the inner diameter of the inner cavity of the elastic member is reduced and the distance of the downward pressure is reduced. However, such a setting will cause the same catheter joint to only lock a specific size of catheter, and will easily cause the phenomenon of poor fit and locking failure due to the size tolerance between the elastic member and the catheter. CONTENT OF THE UTILITY MODEL

[0005] The application provides a self-locking catheter joint to solve the above technical problems, that is, the medical staff operates with different forces and speeds, causing the cylindrical elastic member to be twisted at least in a local area, suddenly becoming thin, thereby causing the catheter located inside the elastic member to be locally clamped or even blocked; the same catheter joint can only lock a specific size of catheter, and is prone to cause the phenomenon of poor fit and locking failure due to the size tolerance between the elastic member and the catheter.

[0006] The technical scheme adopted by the present application is as follows:

[0007] A self-locking catheter joint for assembling a catheter for anesthesia comprises a joint body, the joint body comprising a catheter end and a transfusion end connected to form an integrated structure; the catheter end is used for connecting with the catheter, an elastic member is connected in the catheter end, the elastic member has a mounting hole for inserting the catheter, and the end of the mounting hole can limit the end face of the catheter; the transfusion end is used for connecting with a transfusion device, and the transfusion end has a transfusion cavity for connecting the transfusion device; the transfusion cavity is in communication with the mounting hole.

[0008] At least part of the inner wall of the mounting hole in the axial direction is provided with a locking assembly for abutting against the outer periphery of the catheter, and the locking assembly can abut against the outer wall of the catheter to lock the catheter.

[0009] The self-locking catheter joint of the present application also has the following additional technical features:

[0010] The locking assembly comprises a self-sealing membrane and a barb; the self-sealing membrane and the barb are connected to the inner wall of the mounting hole in the axial direction of the mounting hole, and the self-sealing membrane and the barb are inclined toward the side of the transfusion end to limit the sliding of the catheter away from the transfusion end.

[0011] The self-sealing membrane forms an arc-shaped guide slope toward the side of the transfusion end, when the catheter is in a connected state with the catheter end, the drug liquid in the transfusion cavity flows into the gap between the mounting hole and the catheter due to the increase of pressure, and the arc-shaped guide slope expands toward the axis under the impact force of the drug liquid to lock the outer periphery of the catheter.

[0012] The self-sealing membranes are arranged at equal intervals along the axial direction of the mounting hole; or the self-sealing membranes are arranged at unequal intervals along the axial direction of the mounting hole.

[0013] The barbs are arranged at equal intervals along the axial direction of the mounting hole; or the barbs are arranged at unequal intervals along the axial direction of the mounting hole.

[0014] The self-sealing membranes and the barbs are staggered along the axial direction of the mounting hole; or the self-sealing membranes and the barbs are arranged in pairs along the axial direction of the mounting hole, and two barbs are connected between every two adjacent self-sealing membranes.

[0015] The elastic member has a tapered structure, the catheter end side is provided with an insertion opening corresponding to the mounting hole, and the catheter end side toward the transfusion end is provided with a communication opening corresponding to the mounting hole, the communication opening is in communication with the transfusion cavity, so that the drug liquid in the transfusion cavity enters the catheter in the mounting hole through the communication opening.

[0016] A flow gap is formed between the conduit and the mounting hole under the impact of the liquid medicine, the communication port and the flow gap form a fluid channel for the flow of liquid medicine, and the liquid medicine flowing through the fluid channel causes the radial dimension of the self-sealing membrane to increase to lock the conduit outer wall.

[0017] The inner diameter of the communication port is smaller than the inner diameter of the conduit, so that the insertion end of the conduit can abut against the outer periphery of the orifice of the communication port.

[0018] The outer periphery of the connector end is radially symmetrically provided with at least one pair of first lugs, and the infusion end is radially symmetrically provided with at least one pair of second lugs.

[0019] As the above technical solutions are adopted, the application has the following beneficial effects:

[0020] 1. A self-locking conduit connector for assembling an anesthesia conduit, comprising a connector main body comprising a connector end and an infusion end connected to form an integrated structure; the connector end is used for connecting with the conduit, the connector end is internally connected with an elastic member, the elastic member has a mounting hole for inserting the conduit, and the end of the mounting hole can limit the end surface of the conduit; the infusion end is used for connecting with an infusion device, and the infusion end has an infusion cavity for connecting the infusion device; the infusion cavity is in communication with the mounting hole; at least part of the area of the inner wall of the mounting hole along the axis direction is provided with a locking assembly for abutting against the outer periphery of the conduit, and the locking assembly can abut against the outer wall of the conduit to lock the conduit.

[0021] The connector main body is in an integrated structure, and the two opposite ends of the connector main body are the connector end and the infusion end respectively, the connector end can be connected with the conduit, and the infusion end can be connected with the infusion device; the conduit is inserted into the mounting hole of the elastic member in the connector end from one side of the connector end, and the positioning of the conduit is realized when the end of the conduit is inserted into the end of the mounting hole, thereby completing the assembly of the conduit and the conduit connector and realizing one insertion and one positioning. It is not necessary to compress the elastic member to reduce the inner diameter of the elastic member to lock the conduit after the conduit is inserted, because the elastic member is easy to be twisted in at least part of the area during the compression process due to external force, which causes the cross section of the internal conduit to be suddenly changed and causes the phenomenon of flattening or even complete blockage. The application can avoid the above problems and realize the positioning of the conduit when the conduit is inserted into the end of the mounting hole, thereby realizing fast installation.

[0022] In addition, the locking assembly on the inner wall of the mounting hole can lock the outer circumferential surface of the catheter of different size ranges, thereby enhancing the application range of the catheter, and further effectively preventing the catheter from sliding outward along the mounting hole, so as to achieve sufficient locking and positioning of the catheter. In summary, the application designs the pipe connecting end and the infusion end into an integrated structure and adds the locking assembly, which can effectively enhance the quick installation and locking positioning of the catheter, prevent the occurrence of the catheter blocking and flattening phenomenon, improve the application range of the catheter, and improve the user experience.

[0023] 2. As a preferred embodiment of the application, the locking assembly comprises a self-sealing membrane and a barb; the self-sealing membrane and the barb are connected to the inner wall of the mounting hole along the axis direction of the mounting hole, and the self-sealing membrane and the barb are inclined toward the infusion end side to limit the sliding of the catheter away from the infusion end side.

[0024] The self-sealing membrane and the barb are both inclined, the self-sealing membrane can lock the circumferential surface of the catheter in the mounting hole, and the barb can further enhance the locking of the circumferential surface of the catheter. In addition, the self-sealing membrane and the barb are inclined toward the infusion end side, so they can limit the movement of the catheter, that is, the catheter can only move from the pipe connecting end to the infusion end side, but cannot move from the infusion end to the pipe connecting end side. Therefore, the catheter entering the mounting hole can be effectively prevented from sliding outward from the mounting hole under external force.

[0025] 3. As a preferred embodiment of the application, the self-sealing membrane forms an arc-shaped guide slope toward the infusion end side. When the catheter is connected to the proximal end inner tube, the drug liquid in the infusion cavity flows into the gap between the mounting hole and the catheter under the action of increasing pressure, and the arc-shaped guide slope expands toward the axis under the impact force of the drug liquid to lock the outer circumferential surface of the catheter.

[0026] The arc-shaped guide slope of the self-sealing membrane toward the infusion end side can shorten the distance from the outer circumferential surface of the catheter on one hand, and can achieve the abutting effect of the catheter when entering the mounting hole to lock the catheter. On the other hand, when the drug liquid flows into the gap between the mounting hole and the outer wall of the catheter under the impact of a large pressure, the arc-shaped guide slope is extruded, so that the arc-shaped guide slope expands toward the axis and is closer to the axis, thereby shortening the distance from the outer circumferential surface of the catheter, further locking the outer circumferential surface of the catheter, and firmly stabilizing the catheter in the mounting hole. In addition, the self-sealing membrane is a thin elastic membrane with low rigidity than the catheter, so it will not extrude the catheter to cause deformation of the catheter, but only play a further locking role of the catheter. Therefore, even when the drug liquid has a large pressure or a sudden large delivery pressure occurs, the catheter will not deform, but the locking and stabilizing ability of the catheter is further enhanced.

[0027] 4. As a preferred embodiment of the present application, the elastic member is in a conical structure, the insertion port corresponding to the mounting hole of the elastic member is formed on one side of the connector end, and the communication port corresponding to the mounting hole is formed on the side of the connector end facing the infusion end, the communication port is in communication with the infusion cavity to allow the liquid medicine in the infusion cavity to enter the catheter in the mounting hole through the communication port.

[0028] The insertion port of the connector end allows the catheter to be inserted into the mounting hole from the side of the insertion port, and then the communication port is located at the end of the mounting hole, and the end of the catheter is connected to the outer periphery of the communication port, so that the end of the catheter is positioned at the end of the mounting hole, and the catheter is positioned. Since the liquid medicine in the infusion cavity needs to be input into the catheter in the mounting hole, the communication port is in communication with the infusion cavity.

[0029] 5. As a preferred embodiment of the present application, under the impact of the liquid medicine, a flow gap is formed between the catheter and the mounting hole, a fluid channel for the flow of the liquid medicine is formed between the communication port and the flow gap, and the radial dimension of the self-sealing membrane is increased to lock the outer wall of the catheter by the liquid medicine flowing through the fluid channel.

[0030] Under the impact of the liquid medicine, a certain small flow gap will appear between the catheter and the mounting hole, so that the liquid medicine will flow in the flow gap, and the inner wall of the mounting hole has a self-sealing membrane inclined towards the infusion end, so that the self-sealing membrane will expand towards the axis under the impact of the liquid medicine, that is, the radial dimension of the self-sealing membrane is increased, thereby further locking the outer wall of the catheter, so that the catheter will not be deformed or twisted even under high pressure, but will be more tightly connected with the mounting hole, so that the catheter is effectively positioned in the mounting hole. BRIEF DESCRIPTION OF DRAWINGS

[0031] The drawings described herein are used to provide further understanding of the present application, and form a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0032] Figure 1 is a schematic diagram of the overall structure of a self-locking catheter connector according to an embodiment of the present application;

[0033] Figure 2 is a schematic diagram of the overall structure of a self-locking catheter connector according to another embodiment of the present application;

[0034] In the drawings,

[0035] 1, connector end; 2, elastic member; 3, infusion end; 4, mounting hole; 5, self-sealing membrane; 6, barb; 7, catheter; 8, infusion cavity; 9, communication port. DETAILED DESCRIPTION

[0036] In order to more clearly illustrate the overall concept of the present application, the following will be described in detail with reference to the accompanying drawings.

[0037] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to one skilled in the art that the present application can be practiced without the specific details and other implementations can be employed. Therefore, the scope of the present application is defined by the appended claims, not by the following description.

[0038] In addition, in the description of the present application, it should be understood that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0039] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected, or it can be communicated; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above-mentioned terms in the present application can be understood according to the specific circumstances.

[0040] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. In the description of the specification, the description of the terms "embodiment", "example", "one embodiment", "example" or "specific example" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0041] A self-locking catheter joint, such as Figures 1-2As shown, the connector for assembling the anesthesia catheter 7 comprises a connector body comprising a catheter end 1 and a transfusion end 3 connected to form an integrated structure; the catheter end 1 is used to connect with the catheter 7, and an elastic element 2 is connected in the catheter end 1, the elastic element 2 has a mounting hole 4 for inserting the catheter, and the end of the mounting hole 4 can limit the end face of the catheter 7; the transfusion end 3 is used to connect with the transfusion device, and the transfusion end 3 has a transfusion cavity 8 for connecting the transfusion device; the transfusion cavity 8 is in communication with the mounting hole 4; at least part of the inner wall of the mounting hole 4 in the axial direction is provided with a locking assembly for abutting the outer periphery of the catheter 7, and the locking assembly can abut the outer wall of the catheter 7 to lock the catheter 7.

[0042] The connector body is in an integrated structure, and the two opposite ends of the connector body are the catheter end 1 and the transfusion end 3, respectively. The catheter end 1 can be connected with the catheter 7, and the transfusion end 3 can be connected with the transfusion device. The catheter 7 is inserted into the mounting hole 4 of the elastic element 2 in the catheter end 1 from one side of the catheter end 1. When the end of the catheter 7 is inserted into the end of the mounting hole 4, the positioning of the catheter 7 is realized, and the assembly of the catheter 7 and the catheter connector is completed, realizing one insertion and one position. It is not necessary to compress the elastic element 2 after the catheter 7 is inserted to reduce the inner diameter of the elastic element 2 to lock the catheter 7 in the elastic element 2, because the elastic element 2 is easily twisted in at least part of the area during the compression process due to external force, causing the cross section of the catheter 7 inside to suddenly change and causing the phenomenon of flattening or even complete blockage. The present application can avoid the above problems, and can realize positioning when the catheter 7 is inserted into the end of the mounting hole 4, realizing fast installation;

[0043] In addition, the locking assembly on the inner wall of the mounting hole 4 can lock the outer periphery of the catheter 7 in different size ranges, enhancing the application range of the catheter 7, and further effectively preventing the catheter 7 from sliding outward along the mounting hole 4, thereby realizing sufficient locking and positioning of the catheter 7. In summary, the present application designs the catheter end 1 and the transfusion end 3 into an integrated structure and adds the locking assembly, which can effectively enhance the fast installation and locking positioning of the catheter 7, prevent the occurrence of the flattening and blockage of the catheter 7, and improve the application range of the catheter 7 and the user experience.

[0044] The connection mode between the catheter end 1 and the transfusion end 3 is not limited by the present application, and the following two implementation modes can be adopted:

[0045] Implementation mode one: as shown in the figure, Figure 1 The catheter end 1 and the transfusion end 3 are fixedly connected, and the left end of the transfusion end 3 extends to the outer periphery of the catheter end 1, which can be fixedly connected to the outer periphery of the catheter end.

[0046] Real-time mode two: as shown in the figure, Figure 2As shown, the connector end 1 and the infusion end 3 are fixedly connected, and the left end face of the infusion end 3 is fixedly connected with the right end face of the connector end 1.

[0047] As a preferred embodiment, as shown in the drawings, Figure 1 As shown, the locking assembly comprises a self-sealing membrane 5 and a barb 6; the self-sealing membrane 5 and the barb 6 are connected to the inner wall of the mounting hole 4 along the axial direction of the mounting hole 4, and the self-sealing membrane 5 and the barb 6 are inclined towards the side of the infusion end 3 to limit the sliding of the catheter 7 away from the infusion end 3.

[0048] The self-sealing membrane 5 and the barb 6 are both inclined, the self-sealing membrane 5 can lock the catheter 7 in the mounting hole 4, and the barb 6 can further enhance the locking of the catheter 7. Moreover, the self-sealing membrane 5 and the barb 6 are inclined towards the side of the infusion end 3, so they can limit the movement of the catheter 7, that is, the catheter 7 can only move from the connector end 1 to the side of the infusion end 3, but cannot move from the infusion end to the connector end 1. Therefore, the phenomenon that the catheter 7 in the mounting hole 4 slides out of the mounting hole 4 under external force can be effectively prevented.

[0049] As a preferred embodiment, the self-sealing membrane 5 forms an arc-shaped guide slope towards the side of the infusion end 3. When the catheter 7 is connected to the proximal end inner tube, the drug liquid in the infusion cavity 8 flows into the gap between the mounting hole 4 and the catheter 7 due to the increase in pressure, and the arc-shaped guide slope expands towards the axis under the impact force of the drug liquid to lock the outer periphery of the catheter 7.

[0050] The arc-shaped guide slope of the self-sealing membrane 5 towards the side of the infusion end 3 can shorten the distance to the outer periphery of the catheter 7, realize the abutment of the catheter 7 when it enters the mounting hole 4, and lock the catheter 7. On the other hand, when the drug liquid flows into the gap between the mounting hole 4 and the outer wall of the catheter 7 under the impact of a large amount of drug liquid, the arc-shaped guide slope is extruded, so that the arc-shaped guide slope expands towards the axis and is closer to the axis, thereby shortening the distance to the outer periphery of the catheter 7, further locking the outer periphery of the catheter 7, and firmly stabilizing the catheter 7 in the mounting hole 4. Moreover, the self-sealing membrane 5 is a thin elastic membrane, and its rigidity is lower than that of the catheter 7, so it will not extrude the catheter 7 to cause deformation of the catheter 7, but only further lock the catheter 7. Therefore, even when the drug liquid has a large pressure, or a large delivery pressure suddenly occurs, the catheter 7 will not deform, but the locking and stabilizing ability of the catheter 7 is further enhanced.

[0051] The self-sealing membrane 5 can be in a conical structure, the small end of the conical structure is connected to the peripheral surface of the mounting hole 4, and the large end of the conical structure is away from the peripheral surface of the mounting hole 4 and forms an inclined angle with the peripheral surface of the mounting hole 4. The peripheral surface of the self-sealing membrane 5 in the conical structure is an outward convex circular arc surface, so the self-sealing membrane 5 located in the mounting hole 4 has an arc-shaped guide slope, the small end of the self-sealing membrane 5 in the conical structure faces the catheter 7, and the large end of the self-sealing membrane 5 in the conical structure faces the distal end outer tube. The infusion cavity 8 of the infusion end 3 is in communication with the mounting hole 4, and the catheter 7 and the hole wall of the mounting hole 4 are separated by a small distance under the action of a relatively large impact force, so that a small gap is formed between the catheter 7 and the hole wall of the mounting hole 4 in the radial direction. The drug solution enters the gap and impacts the arc-shaped guide slope of the self-sealing membrane 5, the arc-shaped guide slope is originally in an inclined state, and when the impact force acts on one side of the arc-shaped guide slope, the degree of inclination is increased, so that the arc-shaped guide slope of the self-sealing membrane 5 is further expanded toward the axial direction on one side to further wrap and fasten the outer periphery of the catheter 7, thereby improving the locking and positioning of the catheter 7.

[0052] The distribution mode of the self-sealing membrane 5 can not be limited by the present application, and specifically, any one of the following embodiments can be adopted:

[0053] Embodiment one: The self-sealing membranes 5 are arranged at equal intervals along the axial direction of the mounting hole 4.

[0054] The self-sealing membranes 5 are arranged at equal intervals along the axial direction, so that the self-sealing membranes 5 are uniformly arranged on the outer periphery of the catheter 7, and the uniform fastening effect of the self-sealing membranes 5 on the outer periphery of the catheter 7 is further enhanced.

[0055] Embodiment two: The self-sealing membranes 5 are arranged at unequal intervals along the axial direction of the mounting hole 4.

[0056] The self-sealing membranes 5 are arranged at unequal intervals along the axial direction, so that the positions where stress concentration of the catheter 7 is likely to occur and the regions where deformation of the catheter 7 is likely to be large can be effectively resisted, the regional protection of the catheter 7 is achieved, and the stability of the catheter 7 in the mounting hole 4 is enhanced. The positions where stress concentration of the catheter 7 is likely to occur are, for example, positions close to the infusion cavity 8, and the number of self-sealing membranes 5 is greater than the number of self-sealing membranes 5 in the central position region of the catheter 7 in the mounting hole 4.

[0057] The distribution mode of the barbs 6 can not be limited by the present application, and specifically, any one of the following embodiments can be adopted:

[0058] Embodiment one: The barbs 6 are arranged at equal intervals along the axial direction of the mounting hole 4.

[0059] The barbs 6 are arranged at equal intervals along the axial direction, so that the catheter 7 can be uniformly locked in the axial direction, and the straightness of the catheter 7 is maintained.

[0060] Implementation method 2: The barbs 6 are set non-interval along the axis of the mounting hole 4.

[0061] The barbs 6 are not spaced apart along the axial direction of the mounting hole 4. For example, the number of barbs 6 can be increased in areas where the impact force on the catheter 7 is greater, while the number of barbs 6 can be appropriately reduced in areas where the impact force on the catheter 7 is weaker. For example, the number of barbs 6 can be increased near the infusion chamber 8. The purpose is to reasonably distribute the number of barbs 6 according to the pressure on the catheter 7, so as to improve the positioning stability of the catheter 7 in the mounting hole 4.

[0062] The distribution pattern between the self-sealing film 5 and the barbs 6 is not limited to this application; specifically, any of the following implementation methods can be adopted:

[0063] Implementation method 1: The self-sealing film 5 and the barbs 6 are staggered along the axial direction of the mounting hole 4.

[0064] Both the self-sealing membrane 5 and the barbs 6 are arranged along the axis of the mounting hole 4. The positional relationship between the self-sealing membrane 5 and the barbs 6 is preferably such that they are staggered. That is, a self-sealing membrane 5 is placed in the mounting hole 4 from left to right, followed by a barb 6 at a certain interval, then another self-sealing membrane 5, then another barb 6, and so on. Alternating the self-sealing membrane 5 and the barbs 6 within the mounting hole 4 achieves a uniform locking force on the guide tube 7.

[0065] Real-time method 2: The self-sealing film 5 and the barbs 6 are arranged in pairs along the axial direction of the mounting hole 4, and two barbs 6 are connected between each two adjacent self-sealing films 5.

[0066] The self-sealing film 5 and the barbs 6 are arranged in pairs along the axial direction of the mounting hole 4. For example... Figure 2 As shown, two barbs 6 are provided between two adjacent self-sealing membranes 5. That is, a self-sealing membrane 5 is arranged from left to right in the mounting hole 4, and then a barb 6 is arranged at a certain distance, and then another barb 6 is arranged, and then another self-sealing membrane 5 is arranged to achieve a uniform locking force on the conduit 7.

[0067] In a preferred embodiment, the elastic element 2 has a conical structure. One side of the connecting pipe end 1 has an insertion port corresponding to the mounting hole 4, and the side of the connecting pipe end 1 facing the infusion end 3 has a communication port 9 corresponding to the mounting hole 4. The communication port 9 is connected to the infusion chamber 8 so that the medicine in the infusion chamber 8 can enter the conduit 7 in the mounting hole 4 through the communication port 9.

[0068] The insertion port of the pipe connecting end 1 can enable the catheter 7 to be inserted into the mounting hole 4 from the insertion port side, and then the communication port 9 is located at the end of the mounting hole 4, and the end of the catheter 7 is connected to the outer periphery of the communication port 9, so that the end of the catheter 7 is positioned at the end of the mounting hole 4, and the positioning of the catheter 7 is realized; since the drug liquid in the infusion cavity 8 needs to be input into the catheter 7 in the mounting hole 4, the communication port 9 is connected with the infusion cavity 8.

[0069] As a preferred embodiment, under the impact of the drug liquid, a flow gap is formed between the catheter 7 and the mounting hole 4, a fluid channel for the flow of the drug liquid is formed between the communication port 9 and the flow gap, and the drug liquid flowing through the fluid channel causes the radial dimension of the self-sealing membrane 5 to increase to lock the outer wall of the catheter 7.

[0070] Under the impact of the drug liquid, a certain small flow gap will appear between the catheter 7 and the mounting hole 4, so that the drug liquid will flow in the flow gap, and the inner wall of the mounting hole 4 has a self-sealing membrane 5 that is obliquely arranged towards the infusion end 3, so that under the impact of the drug liquid, the self-sealing membrane 5 expands towards the axis, that is, the radial dimension of the self-sealing membrane 5 increases, thereby further locking the outer wall of the catheter 7, so that even in the case of high pressure, the catheter 7 will not be deformed or twisted, but will be more tightly connected with the mounting hole 4, so that the catheter 7 is effectively positioned in the mounting hole 4.

[0071] As a preferred embodiment, the inner diameter of the communication port 9 is smaller than the inner diameter of the catheter 7, so that the insertion end of the catheter 7 can abut against the outer periphery of the hole of the communication port 9.

[0072] The purpose of the inner diameter of the communication port 9 being smaller than the inner diameter of the catheter 7 is to prevent the end of the catheter 7 from separating from the pipe connecting end 1 after the catheter 7 is inserted into the mounting hole 4 from the insertion port side, and when the inner diameter of the communication port 9 is smaller than the inner diameter of the catheter 7, the end of the catheter 7 can be positioned at the outer periphery of the communication port 9, so that the positioning of the end of the catheter 7 is realized, that is, the catheter 7 can be inserted into the end of the mounting hole 4 to realize positioning.

[0073] As a preferred embodiment, at least one pair of first lugs is symmetrically arranged on the outer periphery of the pipe connecting end 1 along the radial direction, and at least one pair of second lugs is symmetrically arranged on the infusion end 3 along the radial direction.

[0074] In order to facilitate the operation of the pipe connecting end 1 and the infusion end 3, and to facilitate medical staff to hold the pipe connecting end 1 and the infusion end 3 to insert the catheter 7 into the pipe connecting end 1 side or to insert the infusion device or the like into the infusion end 3 side, at least one pair of first lugs is arranged on the outer periphery of the pipe connecting end 1, and the first lugs are protrusively arranged on the outer periphery of the pipe connecting end 1 to facilitate the medical staff to hold, and similarly, the second lugs are protrusively arranged on the outer periphery of the infusion end 3. The parts not mentioned in the present application can be realized by using or referring to the existing technology.

[0075] The various embodiments in the specification are described in progressive manner, and the same or similar parts between the various embodiments can be mutually referred to, and each embodiment focuses on the difference from other embodiments.

[0076] The above only describes the embodiments of the present application and is not intended to limit the present application. The present application can have various changes and modifications for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of claims of the present application.

Claims

1. A self-locking catheter connector for assembling anesthesia catheters, characterized in that, The device includes a connector body, comprising a connecting end and an infusion end that are connected to form an integrated structure. The connecting end is used to connect to a catheter, and an elastic element is connected inside the connecting end. The elastic element has a mounting hole for inserting the catheter, and the end of the mounting hole can limit the end face of the catheter. The infusion end is used to connect to an infusion set, and the infusion end has an infusion chamber for connecting to the infusion set. The infusion chamber communicates with the mounting hole. At least a portion of the inner wall of the mounting hole along the axial direction is provided with a locking component for abutting against the outer periphery of the conduit, the locking component being able to abut against the outer wall of the conduit to lock the conduit.

2. The self-locking conduit connector as described in claim 1, characterized in that, The locking assembly includes a self-sealing membrane and barbs; the self-sealing membrane and the barbs are connected to the inner wall of the mounting hole along the axial direction of the mounting hole, and the self-sealing membrane and the barbs are inclined toward the infusion end to restrict the catheter from sliding toward the side away from the infusion end.

3. A self-locking conduit connector as described in claim 2, characterized in that, The self-sealing membrane forms an arc-shaped guide slope on the side facing the infusion end. When the catheter and the connecting pipe end are connected, the medicine in the infusion chamber increases with pressure, causing some of the medicine that did not enter the catheter to flow into the gap formed between the mounting hole and the catheter. The arc-shaped guide slope expands towards the axis under the impact force of the medicine to lock the outer periphery of the catheter.

4. A self-locking conduit connector as described in claim 2, characterized in that, The self-sealing film is arranged at equal intervals along the axis of the mounting hole; or, the self-sealing film is arranged at non-equal intervals along the axis of the mounting hole.

5. A self-locking conduit connector as described in claim 2, characterized in that, The barbs are evenly spaced along the axis of the mounting hole; or, the barbs are not spaced along the axis of the mounting hole.

6. A self-locking conduit connector as described in claim 2, characterized in that, The self-sealing film and the barbs are staggered along the axial direction of the mounting hole; or, the self-sealing film and the barbs are paired along the axial direction of the mounting hole, with two barbs connecting each pair of adjacent self-sealing films.

7. A self-locking conduit connector as described in claim 2, characterized in that, The elastic element has a conical structure. One side of the connecting pipe end has an insertion port corresponding to the mounting hole, and the side of the connecting pipe end facing the infusion end has a communication port corresponding to the mounting hole. The communication port is connected to the infusion chamber so that the medicine in the infusion chamber can enter the catheter in the mounting hole through the communication port.

8. A self-locking conduit connector as described in claim 7, characterized in that, The impact of the liquid medicine creates a flow gap between the conduit and the mounting hole. A fluid channel for the liquid medicine to flow is formed between the connecting port and the flow gap. The liquid medicine flowing through the fluid channel increases the radial dimension of the self-sealing membrane to lock the outer wall of the conduit.

9. A self-locking conduit connector as described in claim 7, characterized in that, The inner diameter of the connecting port is smaller than the inner diameter of the conduit, so that the insertion end of the conduit can abut against the outer periphery of the opening of the connecting port.

10. A self-locking conduit connector as described in claim 1, characterized in that, The outer periphery of the connector end is symmetrically provided with at least one pair of first lugs along the radial direction, and the infusion end is symmetrically provided with at least one pair of second lugs along the radial direction.

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