Butt joint plug and cryoablation system

Abstract

The embodiment of the utility model discloses a butt joint plug and a cryoablation system. The butt joint plug comprises: a male joint; a butt joint groove is formed in the female joint in the axial direction; the sealing piece is arranged in the butt joint groove; the self-locking mechanism comprises a limiting piece and a locking hook, the limiting piece is arranged on the male connector and protrudes out of the peripheral side wall of the male connector, the locking hook is rotationally connected with the female connector, and a locking groove is formed in the locking hook; during butt joint, the male connector is inserted into the butt joint groove, the lock hook rotates relative to the female connector so that the limiting piece can be sleeved with the locking groove and matched with the locking groove for axial limiting, and the male connector and the female connector press the sealing piece and are locked. According to the butt joint plug, the structure of the butt joint plug is simplified on the premise of guaranteeing excellent sealing performance, the assembling, locking and unlocking processes are simplified, and operation is easy and convenient.

Description

Technical Field

[0001] The utility model relates to the field of mechanical engineering, specifically to the field of cryoablation, and in particular to a docking plug and a cryoablation system. Background Art

[0002] Cryoablation is a surgical technique that uses cryotherapy to eliminate target tissues. The principle is to use cryogenic equipment to make the target tissues undergo a process of cooling, freezing, and rewarming, thereby causing irreversible damage or necrosis of the cells. In the field of cryoablation, the docking plug serves as a bridge for the rapid connection between the cryoablation catheter and the cryoablation device.

[0003] Cryoablation catheters use vacuum insulation technology to release the cold energy of liquid nitrogen at the tip of the catheter. Therefore, ultra-low temperature seals are required at the joints. Such seals can only withstand the low temperature of liquid nitrogen for a short period of time. Over a long period of time, they will harden and lose their elasticity, causing the seal to fail.

[0004] In order to ensure good connection sealing between the cryoablation catheter and the cryoablation device, the docking plug in the prior art is equipped with a separate snap mechanism for connection on each of the multiple pathways connecting the catheter and the device. The structure is complicated. When the doctor removes the catheter, each snap mechanism needs to be removed before pulling out the cryoablation catheter. The operation is cumbersome and the catheter is easily damaged. Utility Model Content

[0005] The embodiments of the utility model provide a docking plug and a cryoablation system, which solve the problems in the prior art that the docking plug has a complex structure, is difficult to assemble, and has difficulty in ensuring the docking sealing performance.

[0006] The utility model provides a docking plug, comprising: a male connector; a female connector, a docking groove is provided in the axial direction; a sealing member is arranged in the docking groove; a self-locking mechanism, comprising a limiter and a lock hook, the limiter is provided on the male connector and protrudes from the outer peripheral side wall of the male connector, the lock hook is rotatably connected to the female connector, and a locking groove is provided on the lock hook; when docking, the male connector is inserted into the docking groove, the lock hook rotates relative to the female connector so that the locking groove is inserted into the limiter and cooperates with the axial limit, and the male connector and the female connector press the sealing member and lock. By setting the self-locking mechanism, after the male connector is inserted into the docking groove of the female connector and docking is completed, the lock hook is rotated toward one side of the male connector so that the locking groove of the lock hook is inserted into the limiter, and the limiter drives the male connector toward the female connector to move in the process of entering the locking groove to make up for the gap caused by the low temperature shrinkage of the sealing member, and after the lock hook is rotated into place, the two sides of the locking groove limit the limiter in the axial direction of the female connector, so that the male connector and the female connector can be locked and tightly cooperate with the sealing member to seal. When unlocking is required, the lock hook only needs to be rotated in the opposite direction to disengage the limiter from the locking groove. The operation is simple, the structure is simple, and excellent sealing performance can be guaranteed. The problem of complicated structural design and complicated locking and unlocking operations in the prior art for ensuring sealing performance of the docking plug is solved.

[0007] In a feasible solution, the locking groove includes a guide section and a locking section, the locking section is arranged to extend axially along the female joint and is connected with the arc of the guide section, and when the locking hook rotates relative to the female joint toward the male joint, the guide section can be inserted into the limiter until the limiter enters the locking section to cooperate with the axial limit. By providing the guide section and the locking section, when the locking hook is rotated, the guide section helps to guide the limiter into the locking groove, avoiding the situation where it cannot enter the locking groove due to misalignment, and reducing the docking precision requirements and operation difficulty.

[0008] In a feasible solution, the self-locking mechanism further includes a handle, the locking hook is provided with two pieces, and the two locking hooks are arranged on the outer peripheral side wall of the female joint in an opposite manner, and the handle is respectively connected to the two locking hooks to simultaneously drive the locking hooks to rotate relative to the female joint. The two locking hooks are arranged on the outer peripheral wall of the female joint in an opposite manner, and locking points are added to lock the opposite sides of the male joint and the female joint to ensure balanced force and stable locking; and by providing a handle, it is convenient for the operator to rotate the two locking hooks at the same time, saving time and effort.

[0009] In a feasible scheme, the female connector includes: a connector body, the docking groove is opened along the axial direction of the connector body, and a receiving hole connected with the docking groove is opened radially on the peripheral side of the connector body; a snap-in piece, movably arranged in the receiving hole and partially able to enter the docking groove; a snap-in sleeve, slidably sleeved on the outer periphery of the connector body and arranged opposite to the receiving hole to stop the snap-in piece from falling out of the receiving hole; the snap-in sleeve is provided with a pushing protrusion protruding toward the connector body, and when the snap-in sleeve slides until the pushing protrusion corresponds to the receiving hole, it can push part of the snap-in piece into the docking groove; a snap-in groove is opened on the outer peripheral side wall of the male connector, and when the male connector is inserted into the docking groove, the part of the snap-in piece pushed out is snapped into the snap-in groove to limit the axial movement of the male connector. With this arrangement, when the male connector is inserted into the docking groove, the buckle sleeve is pushed to move until the pushing protrusion on it pushes part of the snap-fit ​​component into the docking groove and snaps into the slot of the male connector, thereby realizing the quick snap connection of the male connector and the female connector; when the male connector and the female connector need to be separated, it is only necessary to push the buckle sleeve to make the pushing protrusion misaligned with the accommodating hole and at the same time apply force to withdraw the male connector from the docking groove, so that the snap-fit ​​component enters the accommodating hole to release the snap connection, which is simple to operate.

[0010] In a feasible solution, the diameter of the clamping piece is larger than the diameter of the receiving hole located at the side wall of the docking groove. In this way, the structure design of the receiving hole itself can limit the clamping piece from leaving the receiving hole toward one side in the docking groove.

[0011] In a feasible solution, the female connector further includes: a first elastic member, the outer wall of the connector body having a jacket boss, the first elastic member being located between the buckle jacket and the connector body and having both ends abutting against the push protrusion and the jacket boss; a stopper, the stopper being located on the outer wall of the connector body, the first elastic member and the stopper cooperating to limit the axial sliding stroke of the buckle jacket along the connector body; when the first elastic member pushes the buckle jacket to slide along the connector body until it abuts against the stopper, the push protrusion pushes the part of the snap-in member into the slot to be snap-locked. With such an arrangement, the buckle jacket can be slidably installed on the connector body through the stopper and the first elastic member, the structure is simple, and the recovery function of the first elastic member can also realize the automatic recovery of the buckle jacket after the female connector is separated from the male connector, thereby reducing the workload.

[0012] In a feasible solution, the female connector further includes: a snap-on inner sleeve, which is slidably arranged in the docking groove, and when the snap-on inner sleeve slides to correspond to the receiving hole, it cooperates with the snap-on outer sleeve to limit the position of the snap-on connector; a second elastic member, which is axially arranged in the docking groove, and whose two ends are respectively against the docking groove and the snap-on inner sleeve, and an inner sleeve boss is protruding on the side wall of the docking groove, and the second elastic member cooperates with the inner sleeve boss to limit the axial sliding stroke of the snap-on inner sleeve along the connector body. In this way, the snap-on connector is limited in the receiving hole by the cooperation of the snap-on inner sleeve and the snap-on outer sleeve, which effectively prevents the snap-on connector from falling off and causing the connector to fail to snap; at the same time, the automatic recovery function of the second elastic member can realize that the snap-on inner sleeve of the female connector can automatically recover and stop the snap-on connector in time after being separated from the male connector.

[0013] In a feasible solution, the connector body includes a sleeve and a cannula head, the sleeve is sleeved outside the cannula head and cooperates with the cannula head to form the docking groove, and the sleeve and the cannula head are detachably connected; the connector body also includes a fixing piece, a fixing hole is radially provided on the cannula head, a through hole is radially provided on the sleeve, the fixing piece is inserted into the through hole and the fixing hole and is screwed into the fixing hole to limit the relative movement of the sleeve and the cannula head. With such a configuration, the sleeve and the cannula head are detachably connected and are assembled and screwed into the fixing hole through the fixing piece, so as to avoid relative displacement of the sleeve and the cannula head along the axial direction. The structure is simple, and the quick assembly or disassembly of the female connector can be realized.

[0014] In a feasible solution, the cannula head includes: a threaded connection part, through which the sleeve and the cannula head are threadedly connected; a sealing plug-in part, the diameter of which is smaller than the diameter of the threaded connection part so that a movable groove is formed between the sleeve and the sealing plug-in part, and the second elastic member and the buckle inner sleeve are arranged in the movable groove; the sealing plug-in part is provided with a plurality of plug holes for externally connecting a cryoablation device along the axial direction, and the male connector is provided with a plurality of plugs for connecting a cryoablation catheter, one of which is provided as a pressure relief plug; when the male connector is docked with the female connector, the plug is inserted into the corresponding plug hole; a sealing groove is provided on the surface of the sealing plug-in part docking with the male connector, and the sealing member is arranged in the sealing groove. In this way, the cannula head is provided with a threaded connection part to realize the threaded connection between the sleeve and the cannula head, without the aid of an external installation tool, and is easy to assemble; by reducing the diameter of the sealing plug-in part so that a movable groove is formed between it and the sleeve, the second elastic member can move stably in the movable groove to avoid displacement, thereby improving the stability of the docking plug.

[0015] An embodiment of the utility model also provides a cryoablation system, including a cryoablation device, a cryoablation catheter and a docking plug, wherein the docking plug is the docking plug described in any of the above embodiments; the cryoablation catheter is sleeved with an end of the male connector away from the female connector, and the cryoablation catheter is connected to the insertion tube on the male connector, and the cryoablation device is connected to the socket on the female connector.

[0016] Based on the above scheme, it can be known that the utility model provides a docking plug, by setting a self-locking mechanism, after the male connector is inserted into the docking groove of the female connector and the docking is completed, the lock hook is rotated toward one side of the male connector so that the locking groove of the lock hook is inserted into the limiter. At the same time, the limiter drives the male connector toward the female connector to move to make up for the gap caused by the low-temperature shrinkage of the seal during the process of entering the locking groove. After the lock hook is rotated into place, the two sides of the locking groove limit the limiter in the axial direction of the female connector, so that the male connector and the female connector can be locked and tightly sealed with the seal. When unlocking is required, only the lock hook needs to be rotated in the opposite direction to make the limiter disengage from the locking groove. It is easy to operate, simple in structure, and can ensure excellent sealing performance to avoid damaging the docked catheter. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 It is an oblique second view of the overall structure of the docking plug in one embodiment of the utility model;

[0019] Figure 2 for Figure 1 Schematic diagram of the overall structure of the docking plug (unlocked state);

[0020] Figure 3 for Figure 2 AA section view of the butt plug;

[0021] Figure 4 for Figure 2 The overall structure explosion diagram of the docking plug;

[0022] Figure 5 for Figure 2 Schematic diagram of the overall structure of the docking plug (locked state);

[0023] Figure 6 This is a cross-sectional view of the female connector of the docking plug in an embodiment of the utility model when the female connector is not plugged in;

[0024] Figure 7 for Figure 6 A cross-sectional view of the butt plug in the plugged state;

[0025] Figure 8 for Figure 2 BB cutaway view of the butt plug;

[0026] Fig. 9 It is a schematic diagram of the structure of a lock hook in one embodiment of the utility model.

[0027] Numbers in the figure:

[0028] 1. Male connector; 11. Cannula; 111. Vacuum cannula; 112. Liquid inlet cannula; 113. Air return cannula; 114. Pressure relief cannula; 12. Mounting hole; 13. Card slot; 14. Pushing part;

[0029] 2. Female connector; 21. Connector body; 211. Docking groove; 212. Accommodating hole; 213. Sleeve; 2131. Outer sleeve boss; 2132. Inner sleeve boss; 2133. Through hole; 214. Insertion head; 2141. Fixing hole; 2142. Insertion hole; 2143. Screw connection part; 2144. Sealing inserting part; 215. Movable groove; 216. Fixing member; 217. Sealing groove; 22. Snap-on member; 23. Stopper; 24. Buckle outer sleeve; 241. Pushing protrusion; 25. First elastic member; 26. Buckle inner sleeve; 261. Matching protrusion; 27. Second elastic member;

[0030] 3. Self-locking mechanism; 31. Limiting member; 32. Lock hook; 33. Locking groove; 331. Guide section; 332. Locking section; 34. Handle;

[0031] 4. Seals;

[0032] 5. Cryoablation catheter. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 should not be understood as a limitation on the present invention.

[0035] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "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 integrated connection; it can be a mechanical connection, an electrical connection, or a communication connection; 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, unless otherwise clearly limited. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. The technical solution of the present utility model is described in detail with specific embodiments below. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments.

[0036] In the field of cryoablation, it is usually necessary to quickly assemble and connect the cryoablation catheter 5 and the cryoablation device through a docking plug. The cryoablation catheter 5 uses vacuum insulation technology to release the cold of liquid nitrogen at the catheter head end, and an ultra-low temperature seal 4 is required at the joint to ensure the sealing performance of the connection between the catheter and the device. However, this type of seal 4 can only withstand the low temperature of liquid nitrogen for a short period of time. In the case of a long time, it will harden and lose elasticity and the seal will fail. In order to ensure good connection and sealing between the cryoablation catheter 5 and the cryoablation device, the docking plug designed in the prior art is equipped with a separate buckle mechanism for connection on each of the multiple pathways connecting the catheter and the device. The structure is complicated. When the doctor disassembles the catheter, each buckle mechanism needs to be disassembled before the cryoablation catheter can be pulled out. The operation is cumbersome and the catheter is easily damaged.

[0037] In one embodiment of the present application, a docking plug is provided, such as Figures 1 to 5 As shown, Figure 1 This is an oblique second view of the overall structure of the docking plug in the first embodiment of the utility model. Figure 2 This is a schematic diagram of the overall structure of the docking plug (unlocked state). Figure 3 for Figure 2 AA section view of the butt plug, Figure 4This is the overall structure explosion diagram of the docking plug. Figure 5 The overall structure (locked state) of the docking plug is shown in FIG. The docking plug of this embodiment includes a male connector 1, a female connector 2, a seal 4 and a self-locking mechanism 3. In the field of cryoablation, the male connector 1 is used to connect and assemble with the cryoablation catheter 5, and the male connector 1 is used to connect and assemble with the cryoablation device. By docking the male connector 1 and the female connector 2, the cryoablation catheter 5 and the cryoablation device can be docked, and then the transmission of the ablation medium and other tasks can be performed.

[0038] like Figures 1 to 5 As shown, a docking groove 211 is provided on the female connector 2 along its axial direction, and a seal 4 is provided in the docking groove 211. When docking, the male connector 1 is inserted into the docking groove 211 and cooperates with the female connector 2 to press the seal 4 between the two to complete the docking. The self-locking mechanism 3 includes a limiter 31 and a lock hook 32. The limiter 31 is provided on the male connector 1 and protrudes from the outer peripheral side wall of the male connector 1. The lock hook 32 is rotatably connected to the female connector 2, and a lock groove 33 is provided on the lock hook 32. After the male connector 1 is inserted into the docking groove 211 of the female connector 2 and docking is completed, the lock hook 32 is rotated toward one side of the male connector 1 so that the locking groove 33 of the lock hook 32 is inserted into the limiting member 31. At the same time, the limiting member 31 drives the male connector 1 to move toward the female connector 2 during the process of entering the locking groove 33 to make up for the gap caused by the low-temperature shrinkage of the sealing member 4. After the lock hook 32 is rotated into place, the two sides of the locking groove 33 limit the limiting member 31 in the axial direction of the female connector 2, so that the male connector 1 and the female connector 2 can be locked and tightly sealed with the sealing member 4. When unlocking is required, the lock hook 32 only needs to be rotated in the opposite direction to make the limiting member 31 disengage from the locking groove 33. The operation is simple, the structure is simple, and excellent sealing performance can be guaranteed.

[0039] Optionally, in one embodiment, if Fig. 9 As shown, Fig. 9 3 is a schematic diagram of the structure of the locking hook 32. The locking groove 33 includes a guide section 331 and a locking section 332. The locking section 332 is arranged to extend axially along the female connector 2 and is connected with the guide section 331 in an arc shape, so that the limiting member 31 can smoothly enter the locking section 332 along the guide section 331. When the locking hook 32 rotates relative to the female connector 2 toward the male connector 1, the guide section 331 can be inserted into the limiting member 31 until the limiting member 31 enters the locking section 332 to cooperate with the axial limit. The guide section 331 helps guide the limiting member 31 to enter the locking groove 33, avoiding the situation where the limiting member 31 cannot enter the locking groove 33 due to misalignment, thereby reducing the docking precision requirements and operation difficulty.

[0040] like Figure 1As shown, the self-locking mechanism 3 also includes a handle 34, and two locking hooks 32 are provided. The two locking hooks 32 are relatively arranged on the outer peripheral side wall of the female connector 2 to lock the opposite sides of the male connector 1 and the female connector 2, thereby increasing the locking points and ensuring balanced force and stable locking. The handle 34 is respectively connected to the two locking hooks 32 to simultaneously drive the locking hooks 32 to rotate relative to the female connector 2, so that the operator can rotate the two locking hooks 32 at the same time, saving time and effort.

[0041] The mounting hole 12 is provided on the circumferential side wall of the male connector 1, and one end of the stopper 31 is inserted into the mounting hole 12 and threadedly connected, so that assembly and disassembly are convenient and quick. In other embodiments, the stopper 31 can also be assembled with the male connector 1 by welding or bonding, and of course, it can also be made into an integral structure with the male connector 1.

[0042] In one embodiment, if Figure 6 and Figure 7 As shown, Figure 6 is a cross-sectional view of the docking plug in the initial unplugged state. Figure 7 Cross-sectional view of the docking plug in the plugged state. The female connector 2 includes a connector body 21, a clamping piece 22 and a buckle sleeve 24; the connector body 21 is provided with the docking groove 211 along its own axial direction, and a receiving hole 212 connected to the docking groove 211 is provided radially on the peripheral side of the connector body 21; the clamping piece 22 is arranged in the receiving hole 212 and can move in the receiving hole 212, a part of the clamping piece 22 can enter the docking groove 211, and a part is limited in the docking groove 211 to prevent the clamping piece 22 from falling off. The buckle sleeve 24 is slidably sleeved on the outer periphery of the connector body 21 and arranged opposite to the receiving hole 212, and is used to stop the clamping piece 22 from falling out of the receiving hole 212 toward the outer side wall of the connector body 21. The buckle sleeve 24 is provided with a push-up protrusion 241 protruding toward the connector body 21, and the buckle sleeve 24 is pushed to slide along the connector body 21 until the push-up protrusion 241 corresponds to the accommodating hole 212, so that a part of the clamping member 22 can be pushed into the docking groove 211; a clamping groove 13 is provided on the outer peripheral side wall of the male connector 1, and when the male connector 1 is inserted into the docking groove 211, the part of the clamping member 22 pushed out is clamped into the clamping groove 13 to limit the axial movement of the male connector 1, so that the male connector 1 and the connector 1 are connected. Quick clamping of the female connector 2; when the male connector 1 and the female connector 2 need to be separated, it is only necessary to push the buckle sleeve 24 to misalign the pushing protrusion 241 with the accommodating hole 212 and apply force to pull the male connector 1 out of the docking groove 211. When the pushing protrusion 241 and the accommodating hole 212 are misaligned, the clamping part 22 no longer receives the thrust toward the inside of the docking groove 211. In this way, when the male connector 1 is pulled, the clamping part 22 is subjected to the force toward the outside and enters the accommodating hole 212 to release the clamping. The operation is simple.

[0043] In one embodiment, if Figure 6 and Figure 7As shown, the clamping member 22 is configured as a spherical structure, so that a part of the spherical structure can automatically slide out of the receiving groove toward the inner side wall of the connector body 21 and enter the clamping groove 13 to achieve clamping with the male connector 1 without being pushed by external force. In other embodiments, one end of the clamping member 22 close to the inner side wall of the connector body 21 is configured as a spherical structure, or the clamping member 22 is configured as other special-shaped structures.

[0044] Preferably, there are multiple clamping parts 22, and multiple corresponding receiving holes 212 are provided on the corresponding connector body 21. The receiving holes 212 are evenly distributed along the circumference of the connector body 21, and multiple corresponding clamping grooves 13 are provided on the corresponding male connector 1, so as to increase the clamping points between the male connector 1 and the connector body 21, and ensure the strength and stability of the clamping. The corresponding push protrusion 241 on the buckle jacket 24 is arranged around the inner wall of the buckle jacket 24, which is convenient for processing and can also prevent the buckle jacket 24 from rotating and misaligning with the receiving hole 212. Of course, multiple protrusion sections corresponding to the position of the receiving hole 212 can also be provided.

[0045] like Figure 6 and Figure 7 As shown, the female connector 2 also includes a first elastic member 25 and a stopper 23; a sleeve boss 2131 is provided on the outer wall of the peripheral side of the connector body 21, and the sleeve boss 2131, the outer peripheral side wall of the connector body 21 and the snap sleeve 24, and the push protrusion 241 on the snap sleeve 24 are jointly arranged to form a space for installing the first elastic member 25, and the two ends of the first elastic member 25 are against the push protrusion 241 and the sleeve boss 2131, so that the first elastic member 25 can push the snap sleeve 24 to move in an axial straight line and prevent the first elastic member 25 from falling off.

[0046] like Figure 6 and Figure 7 As shown, the stopper 23 is arranged on the outer peripheral side wall of the connector body 21 and is located at one end of the first elastic member 25 away from the outer sleeve boss 2131. The first elastic member 25 and the stopper 23 cooperate to limit the travel of the buckle outer sleeve 24 sliding axially along the connector body 21; when the first elastic member 25 pushes the buckle outer sleeve 24 to slide axially along the connector body 21 until it abuts against the stopper 23, the pushing protrusion 241 pushes the part of the clamping member 22 into the clamping groove 13 for clamping and locking. In this way, the buckle outer sleeve 24 can be slidably installed on the connector body 21 through the stopper 23 and the first elastic member 25. The structure is simple and the assembly is easy. The recovery function of the first elastic member 25 can also realize that the buckle outer sleeve 24 automatically recovers after the female connector 2 is separated from the male connector 1, reducing the workload.

[0047] In this embodiment, the movement stroke of the buckle sleeve 24 is controlled by the side of the buckle sleeve 24 near the male connector 1 and the stopper 23, and the push protrusion 241 plays the dual role of cooperating with the limiter and pushing the clamping member 22, simplifying the structure of the docking plug. In other embodiments, the end of the buckle sleeve 24 itself or another limiter protrusion can cooperate with the stopper 23.

[0048] In a more preferred solution, the diameter of the clamping member 22 is larger than the diameter of the receiving hole 212 located on the side wall of the docking groove 211, so that the structure design of the receiving hole 212 itself can limit the clamping member 22 from escaping from the receiving hole 212 toward one side in the docking groove 211 when a force is applied. Of course, in other embodiments, other methods can be used to limit the clamping member 22 from escaping from the receiving hole 212.

[0049] Please continue reading Figure 6 and Figure 7 The female connector 2 further comprises a buckle inner sleeve 26 and a second elastic member 27. The buckle inner sleeve 26 is slidably arranged in the docking groove 211. When the buckle inner sleeve 26 slides to correspond to the receiving hole 212, it cooperates with the buckle outer sleeve 24 to limit the position of the clip 22. The second elastic member 27 is axially arranged in the docking groove 211, and its two ends are respectively against the docking groove 211 and the buckle inner sleeve 26. An inner sleeve boss 2132 is protruded on the side wall of the docking groove 211. The second elastic member 27 cooperates with the inner sleeve boss 2132 to limit the axial sliding stroke of the buckle inner sleeve 26 along the connector body 21. The buckle inner sleeve 26 and the buckle outer sleeve 24 cooperate to limit the position of the clip 22 in the receiving hole 212, effectively preventing the clip 22 from falling off and causing the connector to fail to connect. At the same time, the automatic recovery function of the second elastic member 27 can realize that the buckle inner sleeve 26 automatically recovers and stops the clip 22 in time after the female connector 2 is separated from the male connector 1.

[0050] Specifically, one end of the snap-in inner sleeve 26 away from the accommodating hole 212 forms a mating protrusion 261 that protrudes toward the inner wall of the connector body 21, and the second elastic member 27 pushes the snap-in inner sleeve 26 toward the male connector 1 until the mating protrusion 261 abuts against the inner sleeve boss 2132, and the movement of the snap-in inner sleeve 26 ends. At this time, the clamping member 22 can be limited, and the second elastic member 27 and the inner sleeve boss 2132 limit the snap-in inner sleeve 26 by clamping the mating protrusion 261 and prevent the snap-in inner sleeve 26 from shaking.

[0051] Please continue reading Figure 6 The surfaces where the inner sleeve boss 2132 and the mating protrusion 261 abut against each other are inclined surfaces. Through the matching of the inclined surfaces and the thrust of the second elastic member 27, an interference fit between the snap-on inner sleeve 26 and the inner wall of the connector body 21 is achieved. In this way, when the male connector 1 and the female connector 2 are separated from each other, the components in the female connector 2 are firmly assembled to prevent the snap-on member 22 from falling off.

[0052] like Figure 6 As shown, a pushing portion 14 protruding from the circumferential outer wall is provided on the circumferential outer wall of the male connector 1. When the male connector 1 is inserted into the docking groove 211, the pushing portion 14 contacts the end of the snap-fit ​​inner sleeve 26 close to the male connector 1 and can push the snap-fit ​​inner sleeve 26 to move away from the male connector 1.

[0053] like Figure 6 and Figure 7 As shown, the connector body 21 includes a sleeve 213 and a cannula head 214 . The sleeve 213 is sleeved outside the cannula head 214 and cooperates with the cannula head 214 to form a docking groove 211 . The inner sleeve boss 2132 is arranged on the circumferential inner wall of the sleeve 213 , and the accommodating hole 212 passes through the circumferential side wall of the sleeve 213 .

[0054] In one embodiment, the sleeve 213 and the cannula head 214 are detachably connected; the connector body 21 further includes a fixing member 216, a fixing hole 2141 is radially provided on the cannula head 214, and a through hole 2133 is radially provided on the sleeve 213, and the fixing member 216 is inserted into the through hole 2133 and the fixing hole 2141 and is screwed into the fixing hole 2141 to limit the relative movement of the sleeve 213 and the cannula head 214. The sleeve 213 and the cannula head 214 are detachably connected and assembled and screwed into the fixing hole 2141 through the fixing member 216, so as to avoid relative displacement of the sleeve 213 and the cannula head 214 in the axial direction, and the structure is simple, and the quick assembly or disassembly of the female connector 2 can be realized. In other embodiments, the sleeve 213 and the cannula head 214 can also be fixedly connected by welding, bonding, etc., or the two are set as an integral structure.

[0055] Furthermore, the cannula head 214 includes a threaded portion 2143 and a sealing plug portion 2144, and the sleeve 213 and the cannula head 214 are threadedly connected via the threaded portion 2143. The threaded portion 2143 is provided on the cannula head 214 to realize the threaded connection between the sleeve 213 and the cannula head 214, and no external installation tools are required, so the assembly is simple.

[0056] Preferably, Figure 7 As shown, the diameter of the sealing plug part 2144 is smaller than the diameter of the threaded part 2143 so that a movable groove 215 is formed between the sleeve 213 and the sealing plug part 2144, and the second elastic member 27 and the buckle inner sleeve 26 are arranged in the movable groove 215. By reducing the diameter of the sealing plug part 2144 so that the movable groove 215 is formed between it and the sleeve 213, the second elastic member 27 can stably move in the movable groove 215 to avoid displacement, thereby improving the stability of the docking plug.

[0057] The sealed plug-in portion 2144 is axially provided with a plurality of sockets 2142 for externally connecting a cryoablation device, and the male connector 1 is provided with a plurality of tubes 11 for connecting a cryoablation catheter 5; when the male connector 1 is docked with the female connector 2, the tubes 11 are inserted into the corresponding sockets 2142 to form a docking passage between the cryoablation device and the catheter.

[0058] In one embodiment, if Figure 8 As shown, Figure 8 for Figure 2 The BB cross-sectional view of the docking plug is a transverse cross-sectional view of the docking plug. Four cannulas 11 are provided, namely a vacuum cannula 111, a liquid inlet cannula 112, a gas return cannula 113, and a pressure relief cannula 114. The pressure relief cannula 114 is used to release nitrogen pressure, so that liquid nitrogen can smoothly enter the output end of the cryoablation catheter 5 from the cryoablation device, which is beneficial to increase the cooling capacity and enhance the cooling effect.

[0059] A sealing groove 217 is also provided in the docking groove 211 of the connector body 21. Specifically, the sealing groove 217 is provided on the surface where the sealing plug-in portion 2144 docks with the male connector 1. The sealing member 4 is provided in the sealing groove 217 to prevent the sealing member 4 from shifting.

[0060] An embodiment of the utility model also provides a cryoablation system, including a cryoablation device, a cryoablation catheter 5 and a docking plug, wherein the docking plug is the docking plug described in any of the above embodiments; the cryoablation catheter 5 is sleeved on the end of the male connector 1 away from the female connector 2, and the cryoablation catheter 5 is connected to the insertion tube 11 on the male connector 1, and the cryoablation device is connected to the socket 2142 on the female connector 2.

[0061] In one embodiment of the present application, Figures 1 to 7 As shown, the following details the use of the docking plug:

[0062] First, the male connector 1 is assembled and connected with the cryoablation catheter 5 in advance, so that the female connector 2 is in the initial state. In the initial state of the female connector 2, the buckle inner sleeve 26 is pushed by the second elastic member 27, and its matching protrusion 261 abuts against the inner sleeve boss 2132 of the sleeve 213. At this time, the buckle inner sleeve 26 pushes a part of the clamping member 22 out of the accommodating hole 212 toward the outside of the sleeve 213, and the clamping member 22 abuts against the pushing protrusion 241 on the buckle outer sleeve 24. The buckle outer sleeve 24 is kept balanced by the joint action of the clamping member 22 and the first elastic member 25. The clamping member 22 is limited in the accommodating hole 212 and kept stationary by the joint action of the buckle inner sleeve 26 and the buckle outer sleeve 24.

[0063] The operator docks the male connector 1 and the female connector 2 of the connecting catheter: the male connector 1 is slid along the inner wall of the sleeve 213 and inserted into the docking groove 211, and the insertion tube 11 is aligned and inserted into the corresponding insertion hole 2142; at this time, the pushing portion 14 on the outer wall of the male connector 1 pushes the buckle inner sleeve 26 to move away from the catheter until the buckle inner sleeve 26 stops moving when the end of the male connector 1 contacts the sealing plug-in portion 2144; at this time, the slot 13 on the male connector 1 is opposite to the accommodating hole 212, so the clamping member 22 is no longer pushed by the buckle inner sleeve 26, and the clamping member 2 2 is able to extend out of the accommodating hole 212 and enter the card slot 13, and the male connector 1 and the sleeve 213 are connected by the limit of the clamping member 22, so that the operator cannot separate the catheter and the male connector 1 from the female connector 2; at this time, the clamping member 22 extends out of the outer side wall of the sleeve 213 in the circumferential direction, and the buckle jacket 24 is no longer limited by the clamping member 22, so the buckle jacket 24 can move toward the male connector 1 under the action of the first elastic member 25 until it is stopped by the stopper 23 and remains motionless, completing the rapid docking process of the male connector 1 and the female connector 2;

[0064] The plug is locked: the operator then pushes the handle 34 to rotate the lock hook 32 toward the male connector 1. During the rotation, the locking groove 33 gradually fits into the stopper 31, and drives the male connector 1 and the catheter to move axially toward the female connector 2 to fill the gap caused by the cold contraction of the seal 4, until the male connector 1 is in close contact with the sealing docking part and stops moving; the operator continues to push the handle 34 to rotate until the stopper 31 completely enters the locking groove 33, and the locking process is completed. At this time, the male connector 1 and the female connector 2 remain fixed, the cryoablation device and the catheter are docked, and the operation can be carried out;

[0065] Unlocking the docking plug: If you need to release the docking between the cryoablation device and the catheter, you only need to push the handle 34 in the opposite direction, and the lock hook 32 will rotate in the opposite direction to disengage the locking groove 33 from the stopper 31;

[0066] The separation process of the male connector 1 and the female connector 2; after the unlocking is completed, the buckle sleeve 24 is pushed to move toward the end away from the male connector 1, so that the pushing protrusion 241 of the buckle sleeve 24 is misaligned with the accommodating hole 212. At this time, the second elastic member 27 automatically restores and pushes the buckle inner sleeve 26 to move toward the male connector 1, and the buckle inner sleeve 26 further pushes the male connector 1 to separate from the female connector 2. At this time, since the pushing protrusion 241 of the buckle sleeve 24 no longer pushes the clamping member 22, the clamping member 22 moves toward the circumferential outer wall of the sleeve 213 due to the action of the side wall of the clamping groove 13. The male connector 1 is no longer limited by the clamping member 22 and can continue to move away from the female connector 2 until the matching protrusion 261 of the buckle inner sleeve 26 abuts against the inner sleeve boss 2122 of the inner wall of the sleeve 213, the male connector 1 can be pulled out of the docking groove 211 of the female connector 2, completing the separation of the docking plug, and the female connector 2 returns to its initial state.

[0067] The present application realizes the fastening connection between the male connector 1 and the female connector 2 by cooperating with the snap-in piece 22 and the slot 13 to achieve quick docking, and further docking and locking of the male connector 1 and the female connector 2 are achieved by the self-locking mechanism 3 to ensure the connection strength between the two. At the same time, the self-locking mechanism 3 drives the male connector 1 and the female connector 2 to move relative to each other to make up for the gap caused by the cold shrinkage of the seal 4, thereby effectively improving the sealing performance of the docking plug.

[0068] In the present invention, unless otherwise clearly specified and limited, a first feature being “on” or “under” a second feature may mean that the first feature and the second feature are in direct contact, or the first feature and the second feature are in indirect contact via an intermediate medium.

[0069] Moreover, the first feature being “above”, “above”, and “above” the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being “below”, “below”, and “below” the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0070] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. 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 utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A docking plug, characterized in that: include: Male connector; The female joint has a butt joint groove arranged along the axial direction; A sealing member, disposed in the docking groove; The self-locking mechanism comprises a limiter and a lock hook, wherein the limiter is arranged on the male connector and protrudes from the outer peripheral side wall of the male connector, the lock hook is rotatably connected to the female connector, and a locking groove is provided on the lock hook; During docking, the male connector is inserted into the docking groove, the locking hook rotates relative to the female connector so that the locking groove is inserted into the limiting member and cooperates with the axial limiting member, and the male connector and the female connector press the sealing member and lock.

2. The docking plug according to claim 1, characterized in that: The locking groove includes a guide section and a locking section, and the locking section is axially extended along the female connector and connected with the arc of the guide section. When the locking hook rotates relative to the female connector toward the male connector, the guide section can be inserted into the limiting member until the limiting member enters the locking section to cooperate with the axial limiting.

3. The docking plug according to claim 1, characterized in that: The self-locking mechanism also includes a handle. The locking hooks are provided in two pieces, and the two locking hooks are arranged oppositely on the outer peripheral side wall of the female joint. The handle is respectively connected to the two locking hooks to simultaneously drive the locking hooks to rotate relative to the female joint.

4. The docking plug according to claim 1, characterized in that: The female connector comprises: A joint body, wherein the butt joint groove is provided along the axial direction of the joint body, and a receiving hole communicating with the butt joint groove is provided along the radial direction on the circumferential side of the joint body; A clamping member, movably disposed in the receiving hole and partially capable of entering the docking groove; A buckle jacket is slidably sleeved on the periphery of the connector body and arranged opposite to the receiving hole to prevent the clip from slipping out of the receiving hole; the buckle jacket is provided with a push protrusion protruding toward the connector body, and when the buckle jacket slides until the push protrusion corresponds to the receiving hole, a part of the clip can be pushed into the docking groove; A clamping groove is provided on the outer peripheral side wall of the male connector. When the male connector is inserted into the docking groove, the protruding portion of the clamping member is clamped into the clamping groove to limit the axial movement of the male connector.

5. The docking plug according to claim 4, characterized in that: The clamping member is configured as a spherical structure, and the diameter of the clamping member is larger than the diameter of the accommodating hole located at the side wall of the docking groove.

6. The docking plug according to claim 4, characterized in that: The female connector also includes: A first elastic member, wherein the outer wall of the connector body is provided with a jacket boss, the first elastic member is located between the buckle jacket and the connector body, and the two ends of the first elastic member abut against the push protrusion and the jacket boss; A stopper, the stopper being arranged on the outer wall of the peripheral side of the joint body, the first elastic member and the stopper cooperating to limit the sliding stroke of the buckle sleeve along the axial direction of the joint body; When the first elastic member pushes the buckle sleeve to slide along the joint body until it abuts against the stopper, the pushing protrusion pushes part of the clamping member into the clamping groove for clamping and locking.

7. The docking plug according to claim 4, characterized in that: The female connector also includes: A buckle inner sleeve, which is slidably disposed in the docking groove, and when the buckle inner sleeve slides to correspond to the accommodating hole, it cooperates with the buckle outer sleeve to form a limiting clamping piece; The second elastic member is axially arranged in the docking groove, and its two ends are respectively abutted against the docking groove and the buckle inner sleeve. An inner sleeve boss is protruding on the side wall of the docking groove. The second elastic member cooperates with the inner sleeve boss to limit the axial sliding stroke of the buckle inner sleeve along the joint body.

8. The docking plug according to claim 7, characterized in that: The joint body comprises a sleeve and a cannula head, wherein the sleeve is sleeved outside the cannula head and cooperates with the cannula head to form the docking groove; The sleeve and the cannula head are detachably connected; the joint body also includes a fixing piece, a fixing hole is radially provided on the cannula head, a through hole is radially provided on the sleeve, the fixing piece is inserted into the through hole and the fixing hole and is threadedly connected to the fixing hole to limit the relative movement of the sleeve and the cannula head.

9. The docking plug according to claim 8, characterized in that: The cannula head comprises: A threaded connection portion, through which the sleeve and the cannula head are threadedly connected; A sealing plug-in portion, wherein the diameter of the sealing plug-in portion is smaller than the diameter of the threaded portion so that a movable groove is formed between the sleeve and the sealing plug-in portion, and the second elastic member and the buckle inner sleeve are arranged in the movable groove; The sealed plug-in portion is provided with a plurality of plug holes for externally connecting a cryoablation device along the axial direction, and the male connector is provided with a plurality of plug tubes for connecting a cryoablation catheter, one of which is a pressure relief plug tube, and the plug tube is inserted into the corresponding plug hole when the male connector is docked with the female connector; A sealing groove is provided on the surface where the sealing plug-in portion and the male connector are connected, and the sealing member is arranged in the sealing groove.

10. A cryoablation system, characterized in that: It comprises a cryoablation device, a cryoablation catheter and a docking plug, wherein the docking plug is the docking plug according to any one of claims 1 to 9; The cryoablation catheter is sleeved with an end of the male connector away from the female connector, and the cryoablation catheter is communicated with the insertion tube on the male connector, and the cryoablation device is communicated with the insertion hole on the female connector.

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