Conical conduit joint

Abstract

The invention discloses a conical catheter connector which is used for being connected with an anesthesia catheter and comprises a cannula connector provided with a conical inner cavity partially extending in the axis direction. The elastic piece is provided with a conical peripheral surface and is sleeved in the conical inner cavity through the conical peripheral surface; a mounting hole for inserting the guide pipe is formed in the elastic piece along the axis direction; the infusion connector is detachably connected to the cannula connector and used for being connected with an infusion apparatus; when the cannula connector and the infusion connector are in an assembled connection state, the infusion connector can be constructed to apply axial compression force to the elastic piece, so that the elastic piece slides towards one side of the catheter in the conical inner cavity and expands towards the wall face of the conical inner cavity, the radial size of the elastic piece is increased, and the aperture of the mounting hole is reduced to lock the catheter; the elastic piece rotates synchronously, in the screwing process of the cannula connector and the infusion connector in the catheter connector, twisting and thinning of at least one section caused by different strengths and speeds of medical staff are avoided, and the catheter is prevented from being flattened.

Description

Technical Field

[0001] The present application belongs to the technical field of catheter assembly, and in particular relates to a tapered catheter joint. Background Art

[0002] Large-sized catheter connectors are usually directly bonded or welded to the end of the catheter by the manufacturer before leaving the factory. However, small-sized catheters or micro-sized catheters need to be inserted into and out of the needle cavity or the laparoscope cavity when in use. For example, epidural nerve block has the advantages of simple operation, low cost, easy insertion and withdrawal of the pipeline during surgery, and convenient epidural analgesia after surgery. It has become a widely used anesthesia method in clinical practice. The outer diameter of the anesthesia catheter used in its application process is generally not more than 1mm. Because its anesthesia catheter is too soft and has no sharp needle end, it is necessary to first enter the epidural needle cavity channel into the epidural cavity during its use. Then, after the anesthesia catheter is in place, the epidural needle will be withdrawn along the entire anesthesia catheter body. Only when the epidural needle is completely withdrawn can the medical staff connect the catheter connector to the anesthesia catheter. Therefore, similar small-sized catheters or micro-sized catheters cannot be directly connected to the end of the catheter by the manufacturer before leaving the factory in actual application fields. When medical staff connect manually, many problems arise:

[0003] Most catheter connectors are cylindrical elastic parts that wrap around the catheter. Doctors connect the connectors by themselves. The rotation and squeezing effect during the connection of the catheter connector reduces the inner diameter of the cylindrical elastic part, thereby wrapping the catheter tightly. In order to facilitate the doctor to insert the catheter into the inner cavity of the elastic part as the catheter connector, the inner diameter of the elastic part is often made larger. The doctor needs to rotate it several times to tighten it. During the tightening process, due to the different operating forces and speeds of different doctors, the cylindrical elastic part is likely to be kinked or suddenly become thinner, resulting in the catheter being blocked in the elastic part due to kinking or partial clamping.

[0004] Although previous generation products have reduced the probability of the catheter connector clogging the catheter by increasing the pitch of the thread or adding a limit device, the structure is too complicated, which increases the difficulty and cost of production, and can only be used for catheters of fixed sizes. If the outer diameter of the catheter is too large or too small, the locking effect will be very poor, and the catheter will easily be pulled out of the catheter connector under the action of external force. Moreover, since the catheter connector is not transparent, the actual locking effect cannot be seen. Summary of the invention

[0005] The present application provides a tapered catheter connector to solve the above technical problems that medical staff need to rotate the catheter connector for multiple turns to lock it during the process of connecting it to the catheter, and that the elastic part may become kinked due to different forces during the tightening process, causing the catheter to be clamped or blocked and unable to be used; the existing production difficulty caused by adding threads and other methods increases the manufacturing cost, and only fixed sizes can be used, resulting in the inability to lock it if the outer diameter is too large or too small, and the scope of application is small.

[0006] The technical solution adopted in this application is:

[0007] A conical catheter connector, used for connecting with an anesthesia catheter, comprising:

[0008] A cannula connector having a tapered inner cavity extending partially along the axial direction;

[0009] The elastic member has a conical peripheral surface and is sleeved in the conical inner cavity through the conical peripheral surface; the elastic member is provided with a mounting hole for inserting a catheter along the axial direction;

[0010] An infusion connector, detachably connected to the cannula connector, for connecting to an infusion set;

[0011] When the cannula connector and the infusion connector are in an assembled connection state, the infusion connector can be configured to give the elastic member an axial compression force so that the elastic member slides toward the catheter side in the conical inner cavity and expands toward the wall of the conical inner cavity, so that the radial size of the elastic member increases and the aperture of the mounting hole decreases to lock the catheter.

[0012] A conical catheter connector of the present application also has the following additional technical features:

[0013] The elastic member is in the shape of a bullet head, and the shape of the conical inner cavity is adapted to the shape of the elastic member so that the elastic member can be sleeved in the conical inner cavity; the elastic member has a thin end facing the catheter along the axial direction, and a thick end arranged opposite to the thin end for being compressed by the infusion connector; the radial dimension of the elastic member from the thin end side to the thick end side gradually increases.

[0014] The inner wall surface of the mounting hole of the elastic member is processed to form a plurality of elastic barbs along the axial direction, and the elastic barbs are distributed at intervals or non-intervals along the circumference of the mounting hole, and the elastic barbs are inclined toward one side of the infusion connector to limit the catheter inserted in the mounting hole from sliding toward the thin end to produce a disengagement movement.

[0015] The cannula connector has a proximal end and a distal end, wherein the proximal end forms a cannula end for connecting with the catheter, and the distal end forms a connection end for matching with the infusion connector;

[0016] The insertion end has a first hole facing the catheter, and the first hole is configured to receive the catheter passing therethrough; the connecting end has a conical inner cavity, and the conical inner cavity has a connecting hole formed toward the proximal end, and the first hole is connected to the conical inner cavity through the connecting hole.

[0017] The projection of the first hole along the radial direction of the cannula connector is a trumpet-shaped structure, and the opening inner diameter of the first hole gradually decreases from the proximal section of the first hole toward the proximal end of the cannula connector to the distal section of the first hole toward the distal end of the cannula connector;

[0018] The distal section opening of the first hole corresponds to the mounting hole, and the inner diameter of the distal section opening of the first hole is not less than the inner diameter of the mounting hole.

[0019] The infusion connector has a mating end connected to the cannula connector and an infusion end connected to the infusion set; the mating end has a first connection portion detachably connected to the outside of the cannula connector and a second connection portion extending into the conical inner cavity and capable of abutting and compressing the elastic member.

[0020] A gap is left between the first connection part and the second connection part in the radial direction to form an annular cavity, the inner wall of the first connection part in the annular cavity is provided with an internal thread, and the outer periphery of the distal end of the cannula connector is provided with an external thread; when the cannula connector and the infusion connector are in an assembled connection state, the external thread of the cannula connector and the internal thread of the infusion connector are screwed together, and the second connection part can partially extend into the conical inner cavity.

[0021] The second connection portion extends along the axial direction of the infusion connector to form an insertion end for compressing the elastic member; a docking hole penetrating the insertion end is provided in the second connection portion along the axial direction, and the docking hole is connected to the mounting hole to form a conducting channel for introducing the catheter.

[0022] The second connecting portion has a plurality of card point protrusions on its outer periphery along the axial direction, and the card point protrusions are used to abut against the inner wall of the conical inner cavity when the second connecting portion extends into the conical inner cavity; or, the outer side of the second connecting portion has a card point protrusion ring arranged in a full circle, and the card point protrusion ring is used to abut against the inner wall of the conical inner cavity when the second connecting portion extends into the conical inner cavity.

[0023] At least part of the cannula connector, the elastic member and the infusion connector is provided with a transparent material. The cannula connector and the infusion connector are made of a hard material, and the elastic member is made of a soft elastic material.

[0024] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows:

[0025] 1. A conical catheter connector, used for connecting with an anesthesia catheter, comprising a cannula connector, an elastic member and an infusion connector; wherein the cannula connector has a conical inner cavity partially extending along the axial direction, and the elastic member needs to be sleeved in the conical inner cavity when in use, and the elastic member has a mounting hole for inserting the catheter along the axial direction, and the catheter needs to be inserted into the mounting hole to realize the assembly of the catheter and the catheter connector when in use;

[0026] Since the elastic member has a tapered circumferential surface and is sleeved in the tapered inner cavity through the tapered circumferential surface, when the cannula connector and the infusion connector are screwed, the rotation of the infusion connector and the cannula connector will not affect the twisting or knotting of the elastic member inside the cannula connector. Since the inner diameter of the small end of the tapered circumferential surface of the elastic member is smaller than the inner diameter of the large end, when the infusion connector abuts against the elastic member, due to the smaller radial dimension of one end of the elastic member, it will not be stuck in the tapered inner cavity but will rotate synchronously with the infusion connector. This avoids the situation in which the end of the traditional elastic member that abuts against the infusion connector rotates while the other end that does not abut against the infusion connector is positioned by the tapered inner cavity and does not move, resulting in local kinking or overall knotting of the elastic member under different forces or different speeds of medical staff. The present application can avoid the phenomenon that the catheter inserted in the mounting hole of the elastic member is passively flattened and blocked due to the knotting of the traditional elastic member. The elastic member of the present application can rotate synchronously with the cannula connector or driven by the infusion connector. Furthermore, during the tightening process, after the tapered circumference of the elastic member is tightly connected with the inner wall of the cannula connector, the elastic member will no longer continue to rotate, but only the infusion connector will rotate on its own. Therefore, the elastic member will not be knotted, and during the connection between the catheter and the catheter connector, the cannula connector and the infusion connector in the catheter connector will not be tangled or thinned due to the different strengths and speeds of medical staff during the screwing process. This ensures that the catheter can be locked while always remaining unobstructed, which is conducive to the smooth progress of the operation.

[0027] In addition, when the tube connector and the infusion connector are in an assembled connection state, the infusion connector can be configured to apply axial compression force to the elastic member so that the elastic member slides toward one side of the catheter in the conical inner cavity and expands toward the wall of the conical inner cavity, so that the radial size of the elastic member increases and the aperture of the mounting hole decreases to lock the catheter.

[0028] 2. As a preferred embodiment of the present application, the elastic member is in the shape of a bullet head, and the shape of the conical inner cavity is adapted to the shape of the elastic member so that the elastic member is sleeved in the conical inner cavity; the elastic member has a thin end facing the catheter along the axial direction, and a thick end arranged opposite to the thin end for being compressed by the infusion connector; the radial dimension of the elastic member gradually increases from the thin end side to the thick end side.

[0029] The tapered inner cavity needs to be compatible with the shape of the elastic member, so that the elastic member can be installed tightly in the tapered inner cavity, thereby realizing the positioning of the elastic member and then fixing the catheter; the elastic member is preferably in the shape of a bullet head, and the thin end and the thick end of the elastic member are located at the two ends of the elastic member along the axial direction, wherein the inner diameter of the thin end is smaller than the inner diameter of the thick end, the thin end is located inside the tapered inner cavity facing the catheter, and the thick end is located inside the tapered inner cavity facing the infusion connector, and a mounting hole is provided between the thin end and the thick end. When in use, the catheter needs to be extended from the thin end to the thick end, so as to realize the fixed installation of the catheter in the elastic member, and the catheter is further elastically connected through the elastic member in the tapered inner cavity, which not only protects the flexible structure of the catheter, so that the catheter can be flexibly positioned in the catheter connector, but also can realize that when the catheter is too large or too small, it can be fixed to the outer periphery of the catheter under the elastic force of the elastic member, thereby enhancing the connection strength between the catheter connector and the catheter and improving the adaptability of catheters of different sizes.

[0030] 3. As a preferred embodiment of the present application, a plurality of elastic barbs are formed on the inner wall surface of the mounting hole of the elastic member along the axial direction, and the elastic barbs are distributed at intervals or non-intervals along the circumference of the mounting hole, and the elastic barbs are inclined toward one side of the infusion connector to limit the catheter inserted in the mounting hole from sliding toward the thin end and generating disengagement movement.

[0031] The purpose of providing multiple elastic barbs extending along the axial direction in the mounting hole of the elastic member is that after the catheter is inserted into the mounting hole, the catheter extends in the axial direction of the mounting hole. If the catheter has a tendency to move toward the proximal end under the action of tension, the multiple elastic barbs in the circumferential direction will expand toward the axis, and the elastic barbs can abut against the outer wall of the catheter to limit the movement of the catheter toward one side of the insertion tube connector, so that the catheter can only move from the thin end to the thick end in the elastic member but cannot move from the thick end toward the thin end, thereby further locking the catheter, preventing the catheter from detaching from the elastic member under the action of external force, and increasing the locking force between the catheter and the insertion tube connector.

[0032] 4. As a preferred embodiment of the present application, the cannula connector has a proximal end and a distal end, the proximal end forms a cannula end for connecting to a catheter, and the distal end forms a connecting end for cooperating with an infusion connector; the cannula end has a first hole facing the catheter, and the first hole is configured to receive the catheter passing therethrough; the connecting end has a conical inner cavity, and a connecting hole is opened on the side of the conical inner cavity toward the proximal end, and the first hole is connected to the conical inner cavity through the connecting hole.

[0033] The cannula end of the cannula connector is used to connect with the catheter, and the connecting end of the cannula connector is used to connect with the infusion connector. The cannula end is provided with a first hole, and the connecting end is provided with a tapered inner cavity, and the tapered inner cavity has a connecting hole. The purpose of the connecting hole being connected with the first hole is to achieve that when the catheter enters the cannula connector from the first hole and then enters the mounting hole of the elastic member in the tapered inner cavity through the connecting hole, the catheter passes through the first hole, the connecting hole and the mounting hole in sequence to increase the installation path length of the catheter, so that the catheter is fully positioned in the axial direction, thereby enhancing the connection strength and locking strength between the catheter and the cannula connector.

[0034] 5. As a preferred embodiment of the present application, the projection of the first hole along the radial direction of the connecting plug is a trumpet-shaped structure, and the opening inner diameter of the first hole gradually decreases from the proximal section of the proximal end of the plug connector to the distal section of the first hole toward the distal end of the plug connector; the opening of the distal section of the first hole corresponds to the mounting hole, and the inner diameter of the opening of the distal section of the first hole is not less than the inner diameter of the mounting hole.

[0035] The first hole is in a trumpet-shaped structure so that the first hole has a proximal section facing the proximal end of the insertion tube connector and a distal section facing the distal end of the insertion tube connector. The inner diameter of the opening gradually decreases from the proximal section to the distal section. The large trumpet-shaped opening of the proximal section facilitates the hand to approach the first hole, so that the hand can hold the end of the catheter and insert it into the opening of the proximal section, which is convenient for smoothly inserting the catheter. The trumpet-shaped opening can provide sufficient space for hand movement; and the trumpet-shaped first hole, due to its inner arc surface, can guide the inserted catheter. Even if the medical staff is not fully focused on inserting the catheter into the insertion hole along the axial direction of the insertion hole, they only need to enter the first hole to be smoothly guided by the inner arc surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative 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:

[0037] Figure 1 This is a schematic diagram of the overall structure of a tapered catheter connector according to an embodiment of the present application;

[0038] Figure 2 It is a structural schematic diagram of a cannula joint of a tapered catheter joint according to an embodiment of the present application;

[0039] Figure 3 A schematic cross-sectional view of a cannula connector of a tapered catheter connector according to an embodiment of the present application;

[0040] Figure 4It is a structural schematic diagram of an infusion connector of a tapered catheter connector according to an embodiment of the present application;

[0041] Figure 5 A schematic cross-sectional view of an infusion connector of a tapered catheter connector according to an embodiment of the present application;

[0042] Figure 6 It is a structural schematic diagram of an elastic member of a tapered catheter connector according to an embodiment of the present application;

[0043] In the figure,

[0044] 1. Insertion joint; 2. Elastic member; 3. Infusion joint; 4. Conical inner cavity; 5. Mounting hole; 6. Elastic barb; 7. Insertion end; 8. Connection end; 9. First opening; 10. Connecting hole; 11. Matching end; 12. Infusion end; 13. First connection part; 14. Second connection part; 15. Annular cavity; 16. Insertion end; 17. Docking hole; 18. Card point protrusion; 19. First lug; 20. Second lug; 21. Conical hole; 22. Bump. DETAILED DESCRIPTION

[0045] In order to more clearly illustrate the overall concept of the present application, a detailed description is given below in an illustrative manner in conjunction with the accompanying drawings.

[0046] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0047] In addition, in the description of the present application, it should be understood that the terms "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying 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 specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0048] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] In the present application, unless otherwise clearly specified and limited, the first feature "above" or "below" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "implementation method", "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 this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0050] The present application relates to a conical conduit connector, such as Figure 1-6 As shown, it is used to connect with an anesthesia catheter, including a cannula connector 1, an elastic member 2 and an infusion connector 3; wherein the cannula connector 1 has a tapered inner cavity 4 partially extending along the axial direction; wherein the elastic member 2 has a tapered circumferential surface and is sleeved in the tapered inner cavity 4 through the tapered circumferential surface; the elastic member 2 is provided with a mounting hole 5 for inserting the catheter along the axial direction; wherein the infusion connector 3 is detachably connected to the cannula connector 1 for connecting with an infusion device; when the cannula connector 1 and the infusion connector 3 are in an assembled connection state, the infusion connector 3 can be configured to give an axial compression force to the elastic member 2, so that the elastic member 2 slides toward one side of the catheter in the tapered inner cavity 4 and expands toward the wall of the tapered inner cavity 4, so that the radial size of the elastic member 2 increases and the diameter of the mounting hole 5 decreases to lock the catheter.

[0051] The conical catheter connector involved in the present application, wherein the intubation connector 1 has a conical inner cavity 4 partially extending along the axial direction, and when in use, the elastic member 2 needs to be sleeved in the conical inner cavity 4, and the elastic member 2 has a mounting hole 5 for inserting the catheter along the axial direction, and when in use, the catheter needs to be inserted into the mounting hole 5 to realize the assembly of the catheter and the catheter connector;

[0052] Since the elastic member 2 has a tapered circumferential surface and is sleeved in the tapered inner cavity 4 through the tapered circumferential surface, when the cannula connector 1 and the infusion connector 3 are screwed, the rotation of the infusion connector 3 and the cannula connector 1 will not affect the twisting or knotting of the elastic member 2 inside the cannula connector 1. Since the inner diameter of the small end of the tapered circumferential surface of the elastic member 2 is smaller than the inner diameter of the large end, when the infusion connector 3 abuts against the elastic member 2, due to the smaller radial dimension of one end of the elastic member 2, it will not be stuck in the tapered inner cavity 4 but will rotate synchronously with the infusion connector 3, thereby avoiding the rotation of the end of the traditional elastic member 2 that abuts against the infusion connector 3, while the other end that does not abut against the infusion connector 3 is positioned by the tapered inner cavity 4 and does not move, thereby causing the elastic member 2 to move under different forces or different speeds of medical staff. The present invention can avoid the phenomenon that the catheter inserted in the mounting hole 5 of the elastic member 2 is passively flattened and blocked due to the knotting of the traditional elastic member 2. The elastic member 2 of the present invention can rotate synchronously with the insertion tube connector 1 or the infusion connector 3. Furthermore, during the tightening process, after the tapered circumference of the elastic member is tightly connected with the inner wall of the insertion tube connector, the elastic member will not continue to rotate, but only the infusion connector will rotate on its own. Therefore, the elastic member will not be knotted, and during the connection between the catheter and the catheter connector, the insertion tube connector 1 and the infusion connector 3 in the catheter connector will not be tangled or thinned due to the different strengths and speeds of medical staff during the screwing process. This ensures that the catheter can always remain unobstructed, which is conducive to the smooth progress of the operation.

[0053] In addition, when the tube connector 1 and the infusion connector 3 are in an assembled connection state, the infusion connector 3 can be configured to give an axial compression force to the elastic member 2 so that the elastic member 2 slides toward the catheter side in the conical inner cavity 4 and expands toward the wall of the conical inner cavity 4, so that the radial size of the elastic member 2 increases and the aperture of the mounting hole 5 decreases to lock the catheter.

[0054] As a preferred embodiment, the elastic member 2 is in the shape of a bullet head, and the shape of the conical inner cavity 4 is adapted to the shape of the elastic member 2 so that the elastic member 2 is sleeved in the conical inner cavity 4; the elastic member 2 has a thin end facing the catheter along the axial direction, and a thick end arranged opposite to the thin end for being compressed by the infusion connector 3; the radial dimension of the elastic member 2 gradually increases from the thin end side to the thick end side.

[0055] The conical inner cavity 4 needs to be adapted to the shape of the elastic member 2, so that the elastic member 2 can be installed closely in the conical inner cavity 4, so as to realize the positioning of the elastic member 2 and then fix the catheter; the elastic member 2 is preferably in the shape of a bullet head, and the thin end and the thick end of the elastic member 2 are located at the two ends of the elastic member 2 along the axial direction, wherein the inner diameter of the thin end is smaller than the inner diameter of the thick end, the thin end is located inside the conical inner cavity 4 facing the catheter, and the thick end is located inside the conical inner cavity 4 facing the infusion connector 3, and a mounting hole 5 is provided between the thin end and the thick end;

[0056] When in use, the catheter needs to be extended from the thin end to the thick end, so that the catheter can be fixedly installed in the elastic member 2, and the catheter is further elastically connected through the elastic member 2 in the tapered inner cavity 4, which not only protects the flexible structure of the catheter so that the catheter can be flexibly positioned in the catheter connector, but also can achieve that when the catheter is too large or too small, it can be fixed tightly against the outer periphery of the catheter under the elastic force of the elastic member 2, thereby enhancing the connection strength between the catheter connector and the catheter and improving the adaptability of catheters of different sizes.

[0057] As a preferred embodiment, the inner wall surface of the mounting hole 5 of the elastic member 2 is processed along the axial direction to form a plurality of elastic barbs 6, the elastic barbs 6 are inclined toward one side of the infusion connector 3, and the elastic barbs 6 are distributed at intervals or non-intervals along the circumference of the mounting hole 5 to limit the catheter inserted in the mounting hole 5 from sliding toward the thin end and producing a disengagement movement.

[0058] The purpose of providing multiple elastic barbs 6 extending along the axial direction in the mounting hole 5 of the elastic member 2 is that after the catheter is inserted into the mounting hole 5, the catheter extends in the axial direction of the mounting hole 5. If the catheter has a tendency to move toward the proximal end under the action of tension, the elastic barbs 6 can expand toward the axis. The elastic barbs 6 can abut against the outer wall of the catheter, which can limit the movement of the catheter toward the side of the insertion tube connector 1, so that the catheter can only move from the thin end to the thick end in the elastic member 2 but cannot move from the thick end toward the thin end, thereby further locking the catheter, preventing the catheter from detaching from the elastic member 2 under the action of external force, and increasing the locking force between the catheter and the insertion tube connector 1.

[0059] As a preferred embodiment, Figure 3 As shown, the cannula connector 1 has a proximal end and a distal end, the proximal end forms a cannula end 7 for connecting to a catheter, and the distal end forms a connecting end 8 for matching with an infusion connector 3; the cannula end 7 has a first hole 9 facing the catheter, and the first hole 9 is configured to receive the catheter passing therethrough; the connecting end 8 has a tapered inner cavity 4, and the tapered inner cavity 4 has a connecting hole 10 on one side toward the proximal end, and the first hole 9 is connected to the tapered inner cavity 4 through the connecting hole 10.

[0060] The cannula end 7 of the cannula connector 1 is used to connect with the catheter, and the connecting end 8 of the cannula connector 1 is used to connect with the infusion connector 3. The cannula end 7 is provided with a first hole 9, and the connecting end 8 is provided with a tapered inner cavity 4. The tapered inner cavity 4 has a connecting hole 10. The purpose of the connecting hole 10 being connected with the first hole 9 is to achieve that when the catheter enters the cannula connector 1 from the first hole 9 and then enters the mounting hole 5 of the elastic member 2 in the tapered inner cavity 4 through the connecting hole 10, the catheter passes through the first hole 9, the connecting hole 10 and the mounting hole 5 in sequence to increase the installation path length of the catheter, so that the catheter is fully positioned in the axial direction, thereby enhancing the connection strength and locking strength between the catheter and the cannula connector 1.

[0061] Furthermore, the projection of the first hole 9 along the radial direction of the pipe plug is a trumpet-shaped structure, and the opening inner diameter of the first hole 9 gradually decreases from the proximal section of the proximal end of the pipe connector 1 to the distal section of the first hole 9 toward the distal end of the pipe connector 1; the opening of the distal section of the first hole 9 corresponds to the mounting hole 5, and the inner diameter of the opening of the distal section of the first hole 9 is not less than the inner diameter of the mounting hole 5.

[0062] The first hole 9 has a trumpet-shaped structure so that the first hole 9 has a proximal section facing the proximal end of the cannula connector 1 and a distal section facing the distal end of the cannula connector 1, and the inner diameter of the opening gradually decreases from the proximal section to the distal section. The large trumpet-shaped opening of the proximal section facilitates the hand to approach the first hole 9, so that the hand can hold the end of the catheter and insert it into the opening of the proximal section, which is convenient for smoothly inserting the catheter. The trumpet-shaped opening can provide sufficient space for hand movement.

[0063] The assembly method of the cannula connector 1 and the infusion connector 3 is not limited by the present application, and any of the following embodiments may be adopted:

[0064] Embodiment 1: The distal outer periphery of the cannula connector 1 is provided with an external thread, and one end of the infusion connector 3 is provided with an internal thread. The external thread of the cannula connector 1 is connected to the internal thread of the infusion connector 3, so that the infusion connector 3 can be detachably connected to the outside of the cannula connector 1.

[0065] The distal end is recorded as the end away from the catheter, and the proximal end is recorded as the end close to the catheter.

[0066] like Figure 1 and Figure 3 As shown, the distal periphery of the cannula connector 1 is provided with an external thread, and the infusion connector 3 is provided with an internal thread. The infusion connector 3 is connected to the periphery of the cannula connector 1 by threading the internal thread of the infusion connector 3 with the external thread of the cannula connector 1 .

[0067] Embodiment 2: A slot is provided at the outer periphery of the distal end of the cannula connector 1 , and a buckle is provided at one end of the infusion connector 3 . The slot and the buckle cooperate with each other, so that the infusion connector 3 can be detachably connected to the outer side of the cannula connector 1 .

[0068] The following two embodiments can be used in this implementation:

[0069] Embodiment 1: A slot is provided along the axial direction on the outer periphery of the distal end of the cannula connector 1. The slot may be in a square, arc or semicircular shape, and there is no specific limitation. The buckle is provided on the inner wall of the infusion connector 3 and protrudes from the inner wall of the infusion connector 3. The buckle is adapted to the slot shape, and the buckle corresponds to the slot position. When in use, the infusion connector 3 is sleeved on the outer side of the cannula connector 1 along the axial direction, and the buckle is connected to the corresponding slot to achieve the matching connection between the infusion connector 3 and the cannula connector 1.

[0070] Embodiment 2: A slot is provided on the outer periphery of the distal end of the cannula connector 1, and the slot includes a first slot along the circumferential direction and a second slot along the axial direction, and the first slot is communicated with the second slot; a buckle is provided on the infusion connector 3 to cooperate with the first slot and the second slot; when in use, the infusion connector 3 moves to the outside of the cannula connector 1 along the axial direction, and the buckle on the infusion connector 3 first moves from the second slot along the extension direction of the second slot, that is, moves along the axial direction of the cannula connector 1, and then when it moves to the end of the second slot, the infusion connector 3 is rotated around the axial direction of the cannula connector 1, so that the slot continues to move from the first slot to the end of the first slot. In addition, further, a groove can be provided at the end of the first slot, and the groove can cooperate with the buckle, so that the buckle is buckled in the groove, thereby positioning the infusion connector 3 and the cannula connector 1.

[0071] Furthermore, if Figure 2 and Figure 3 As shown, first lugs 19 are symmetrically arranged along the radial direction on the outer circumference of the cannula connector 1 , so that the cannula connector 1 can be threadedly connected to the infusion connector 3 by medical personnel by rotating the cannula connector 1 through the first lugs 19 .

[0072] As a preferred embodiment, the infusion connector 3 has a mating end 11 that is mated with the cannula connector 1, and an infusion end 12 that is mated with the infusion pump; the mating end 11 has a first connecting portion 13 that is detachably connected to the outside of the cannula connector 1, and a second connecting portion 14 that extends into the conical inner cavity 4 and can abut and compress the elastic member 2.

[0073] like Figure 4 and Figure 5As shown, the infusion connector 3 has a mating end 11 and an infusion end 12 arranged opposite to each other, the mating end 11 is used to connect with the cannula connector 1, and the infusion end 12 is used to connect with the infusion set; preferably, the mating end 11 and the infusion end 12 are connected to form a T-shaped structure, the radial dimension of the mating end 11 is adapted to the outer diameter dimension of the connecting end 8 of the cannula connector 1, and the mating end 11 of the infusion connector 3 has a first connecting portion 13 and a second connecting portion 14 arranged coaxially, and the first connecting portion 13 forms the outer edge of the mating end 11, presenting a circular ring structure The second connection part 14 is arranged inside the first connection part 13 and has a columnar structure. When the infusion connector 3 and the intubation connector 1 are assembled, the first connection part 13 is sleeved on the outside of the connection end 8 of the intubation connector 1, and the second connection part 14 enters the tapered inner cavity 4 in the connection end 8 to abut against the compressed elastic member 2, so that the elastic member 2 is compressed and expanded laterally, the radial dimension increases, and the dimension of the mounting hole 5 decreases, so that the inner periphery of the mounting hole 5 can lock the catheter, thereby realizing the connection between the infusion connector 3 and the intubation connector 1 and the positioning of the catheter.

[0074] Furthermore, a gap is left between the first connection portion 13 and the second connection portion 14 in the radial direction to form an annular cavity 15, and the inner wall of the first connection portion 13 in the annular cavity 15 is provided with an internal thread, and the distal periphery of the cannula connector 1 has an external thread; when the cannula connector 1 and the infusion connector 3 are in an assembled connection state, the external thread of the cannula connector 1 and the internal thread of the infusion connector 3 are screwed together, and the second connection portion 14 can partially extend into the conical inner cavity 4.

[0075] There is a reserved gap between the first connecting part 13 and the second connecting part 14 in the radial direction, so that an annular cavity 15 is formed between the first connecting part 13 and the second connecting part 14. The inner wall of the first connecting part 13 is provided with an internal thread, and the connecting end 8 of the pipe connector 1 has an external thread. The internal thread of the first connecting part 13 is threadedly connected with the external thread of the connecting end 8 of the pipe connector 1, so that the first connecting part 13 is sleeved on the outside of the connecting end 8 of the pipe connector 1, and the partial structure of the second connecting part 14 can partially extend into the conical inner cavity 4, can abut the elastic member 2 and continuously move into the conical inner cavity 4 during the continuous screwing process of the first connecting part 13 and the connecting end 8 of the pipe connector 1, so that the elastic member 2 is fully compressed and the catheter is tightened and locked.

[0076] Furthermore, the second connecting portion 14 extends along the axial direction of the infusion connector 3 to form an insertion end 16 for compressing the elastic member 2; a docking hole 17 penetrating the insertion end 16 is opened in the second connecting portion 14 along the axial direction, and the docking hole 17 is connected to the mounting hole 5 to form a conducting channel for introducing the catheter.

[0077] like Figure 5As shown, the first connecting portion 13 is a circular ring structure, and the second connecting portion 14 is located in the first connecting portion 13 and extends toward one side of the cannula connector 1 along the central axis direction of the infusion connector 3 to form a top insertion end 16 for compressing the elastic member 2, as shown in FIG. Figure 4 The leftmost end surface of the second connecting portion 14 is the insertion end 16 .

[0078] In order to achieve rapid locking of the catheter, the length of the second connection part 14 extending along the axial direction of the infusion connector 3 is greater than the length of the first connection part 13 along the axial direction of the infusion connector 3, so that the end surface of the push-in end 16 protrudes from the end surface of the first connection part 13, so that when the first connection part 13 is threadedly connected to the outside of the connection end 8 of the intubation connector 1, the push-in end 16 contacts the intubation connector 1 before the end surface of the first connection part 13, and the push-in end 16 can preliminarily compress the elastic member 2 when the first connection part 13 is not in contact with the connection end 8 of the intubation connector 1;

[0079] When the first connecting portion 13 begins to be threadedly connected with the connecting end 8 of the tube connector 1, the pushing end 16 can continue to move toward the elastic member 2 during the screwing process of the infusion connector 3, thereby further compressing the elastic member 2, until the first connecting portion 13 is locked and connected with the connecting end 8 of the tube connector 1, and the pushing end 16 stops compressing the elastic member 2, so that the elastic member 2 is positioned in the tapered inner cavity 4 by the inner wall of the tapered inner cavity 4 and the pushing end 16, so that the elastic member 2 can expand in the tapered inner cavity 4, the radial dimension increases but the inner diameter dimension of the mounting hole 5 decreases, thereby positioning the catheter in the mounting hole 5, so that the catheter is locked in the mounting hole 5.

[0080] When the infusion connector 3 is connected to the cannula connector 1, the docking hole 17 of the second connecting portion 14 of the infusion connector 3 that passes through along the axial direction can correspond to the mounting hole 5 to form a conducting channel for introducing the catheter; the infusion end 12 of the infusion connector 3 is provided with a tapered hole 21, which is used to plug in the infusion set, and the docking hole 17 can also be connected to the tapered hole 21, so that the liquid medicine in the infusion set in the tapered hole 21 can flow into the catheter in the conducting channel through the tapered hole 21.

[0081] Furthermore, the second connection portion 14 has a plurality of card point protrusions 18 on the outer periphery along the axial direction, and the card point protrusions 18 are used to abut against the inner wall of the conical inner cavity 4 when the second connection portion 14 extends into the conical inner cavity 4; or, the outer side of the second connection portion 14 has a card point protrusion ring arranged in a full circle, and the card point protrusion ring is used to abut against the inner wall of the conical inner cavity 4 when the second connection portion 14 extends into the conical inner cavity 4.

[0082] like Figure 5As shown, the outer circumference of the second connection part 14 is provided with a plurality of card point protrusions 18 at intervals along the axial direction, or the outer circumference of the second connection part 14 is provided with a plurality of card point protrusions 18 at non-intervals along the axial direction; when the cannula connector 1 is threadedly connected with the infusion connector 3, the first connection part 13 is threadedly connected to the outer side of the connection end 8 of the cannula connector 1, and the top insertion end 16 of the second connection part 14 extends into the conical inner cavity 4 to compress the elastic member 2, so that the elastic member 2 slides toward one side of the catheter along the axial direction, so that a gap appears between the thick end of the elastic member 2 and the end surface of the conical inner cavity 4 to form a moving space, and ... second connection part 13 is threadedly connected to the outer side of the connection end 8 of the cannula connector 1, and the top insertion end 16 of the second connection part 14 The card point protrusions 18 on the outer circumferential direction of the second connection part 14 can abut against the inner wall of the tapered inner cavity 4 in the moving space under the movement of the second connection part 14, thereby further improving the connection strength between the second connection part 14 and the tapered inner cavity 4, and the setting of the card point protrusions 18 further prevents the second connection part 14 from slipping from the insertion tube connector 1, and cooperates with the thread to achieve a locking connection between the insertion tube connector 1 and the infusion connector 3, thereby further improving the locking positioning of the elastic member 2, thereby further improving the locking positioning of the mounting hole 5 of the elastic member 2 on the catheter.

[0083] As a preferred embodiment, at least part of the cannula connector 1, the elastic member 2 and the infusion connector 3 is provided with a transparent material, the cannula connector 1 and the infusion connector 3 are made of a hard material, and the elastic member 2 is made of a soft elastic material.

[0084] At least part of the cannula connector 1, the elastic member 2 and the infusion connector 3 are provided with transparent material. Preferably, the connecting end 8 of the cannula connector 1, the mating end 11 of the infusion connector 3 and the elastic member 2 are provided with transparent material, so that medical staff can conveniently observe the connection process of the cannula connector 1 and the elastic member 2 and the infusion connector 3 inside it from the outside, and it is convenient to observe the moving position of the internal elastic member 2 and the locking degree of the catheter, so as to facilitate the adjustment of the connection degree of the infusion connector 3 and the cannula connector 1, and can timely observe the state of catheters of different sizes under the compression of different degrees of the elastic member 2, so as to avoid the phenomenon of catheter flattening.

[0085] like Figure 2 As shown, a protrusion 22 is provided along the radial direction on the outer periphery of the infusion end 12 of the infusion connector 3, and the protrusion 22 protrudes from the outer wall along the radial direction. The setting of the protrusion 22 is used to realize the positioning of the infusion set, and to limit the movement of the infusion set along the axial direction of the tapered hole 21, so as to prevent the infusion set from entering the tapered hole 21 too much and being difficult to be pulled out. In addition, a plurality of second lugs 20 are provided at equal intervals along the circumferential direction on the outer periphery of the cannula end 7 of the infusion connector 3, and the setting of the second lugs 20 facilitates the medical staff to push the infusion connector 3 and the cannula connector 1 by hand to threadedly connect them.

[0086] Anything not described in this application can be achieved by adopting or drawing on existing technologies.

[0087] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0088] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A conical catheter connector for connecting to an anesthesia catheter, characterized in that: include: A cannula connector having a tapered inner cavity extending partially along the axial direction; An elastic member having a conical peripheral surface and being sleeved in the conical inner cavity through the conical peripheral surface; The elastic member is provided with a mounting hole for inserting the conduit along the axial direction; An infusion connector, detachably connected to the cannula connector, for connecting to an infusion set; When the cannula connector and the infusion connector are in an assembled connection state, the infusion connector can be configured to give the elastic member an axial compression force so that the elastic member slides toward the catheter side in the conical inner cavity and expands toward the wall of the conical inner cavity, so that the radial size of the elastic member increases and the aperture of the mounting hole decreases to lock the catheter.

2. A tapered conduit connector as claimed in claim 1, characterized in that: The elastic member is in the shape of a bullet head, and the shape of the conical inner cavity is adapted to the shape of the elastic member so that the elastic member can be sleeved in the conical inner cavity; the elastic member has a thin end facing the catheter along the axial direction, and a thick end arranged opposite to the thin end for being compressed by the infusion connector; the radial dimension of the elastic member gradually increases from the thin end side to the thick end side.

3. A tapered conduit connector as claimed in claim 2, characterized in that: The inner wall surface of the mounting hole of the elastic member is processed to form a plurality of elastic barbs along the axial direction, and the elastic barbs are distributed at intervals or non-intervals along the circumference of the mounting hole, and the elastic barbs are inclined toward one side of the infusion connector to limit the catheter inserted in the mounting hole from sliding toward the thin end to produce a disengagement movement.

4. A tapered conduit connector as claimed in claim 1, characterized in that: The cannula connector has a proximal end and a distal end, wherein the proximal end forms a cannula end for connecting with the catheter, and the distal end forms a connection end for matching with the infusion connector; The insertion end has a first hole facing the catheter, and the first hole is configured to receive the catheter passing therethrough; the connecting end has a conical inner cavity, and the conical inner cavity has a connecting hole formed toward the proximal end, and the first hole is connected to the conical inner cavity through the connecting hole.

5. A tapered conduit connector as claimed in claim 4, characterized in that: The projection of the first hole along the radial direction of the cannula connector is a trumpet-shaped structure, and the opening inner diameter of the first hole gradually decreases from the proximal section of the first hole toward the proximal end of the cannula connector to the distal section of the first hole toward the distal end of the cannula connector; The distal section opening of the first hole corresponds to the mounting hole, and the inner diameter of the distal section opening of the first hole is not less than the inner diameter of the mounting hole.

6. A tapered conduit connector as claimed in claim 1, characterized in that: The infusion connector has a mating end connected to the cannula connector and an infusion end connected to the infusion set; the mating end has a first connection portion detachably connected to the outside of the cannula connector and a second connection portion extending into the conical inner cavity and capable of abutting and compressing the elastic member.

7. A tapered conduit connector as claimed in claim 6, characterized in that: A gap is left between the first connection part and the second connection part in the radial direction to form an annular cavity, the inner wall of the first connection part in the annular cavity is provided with an internal thread, and the outer periphery of the distal end of the cannula connector is provided with an external thread; when the cannula connector and the infusion connector are in an assembled connection state, the external thread of the cannula connector and the internal thread of the infusion connector are screwed together, and the second connection part can partially extend into the conical inner cavity.

8. A tapered conduit connector as claimed in claim 6, characterized in that: The second connection portion extends along the axial direction of the infusion connector to form an insertion end for compressing the elastic member; a docking hole penetrating the insertion end is provided in the second connection portion along the axial direction, and the docking hole is connected to the mounting hole to form a conducting channel for introducing the catheter.

9. A tapered conduit connector as claimed in claim 6, characterized in that: The outer periphery of the second connection part along the axial direction has a plurality of clamping point protrusions, and the clamping point protrusions are used to abut against the inner wall of the tapered inner cavity when the second connection part extends into the tapered inner cavity.

10. A tapered conduit connector according to claim 1, characterized in that: At least part of the cannula connector, the elastic member and the infusion connector is provided with a transparent material. The cannula connector and the infusion connector are made of a hard material, and the elastic member is made of a soft elastic material.

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