Stable connecting device and mucous membrane surgical instrument

Abstract

The utility model provides a stable connecting device and a mucous membrane surgical instrument, and relates to the technical field of medical instruments, the stable connecting device comprises a front end cap, a flexible metal catheter and a butt joint. The front end cap is arranged on one side of the ferrule, a first through hole is formed in the front end cap in a penetrating mode, a second through hole is formed in the flexible metal conduit, a hollow space is formed in the butt joint in a penetrating mode, one end of the flexible metal conduit extends into the hollow space to be connected with one end of the butt joint, and the front end cap can partially extend into the hollow space to be connected with the other end of the butt joint. The first through hole is communicated with the second through hole, so that the inhaul cable and the ferrule can penetrate through the second through hole and the first through hole; the hollow space is arranged in the butt joint in a penetrating mode, so that the butt joint is connected with the front end cap and the flexible metal conduit, the connection stability of the front end cap and the flexible metal conduit is improved, and the technical problem that in the prior art, the flexible metal conduit and the ceramic part are prone to loosening due to the fact that the flexible metal conduit and the ceramic part are difficult to be stably connected is solved; and the safety of the mucous membrane surgical instrument is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, and in particular to a stable connection device and a mucosal surgical instrument. Background Art

[0002] EMR (endoscopic mucosal resection) surgery is endoscopic mucosal resection. For lesions of the upper and lower digestive tract, as well as early tumors, early gastric cancer, early colon cancer and early esophageal cancer, EMR surgery can be used to remove the mucosa and local lesions, thereby curing benign tumors and early cancers. At present, endoscopic mucosal resection is generally divided into two types. One is thermal resection surgery, which uses a high-temperature loop to remove the lesion; the other is cold resection surgery, which uses a flexible metal catheter or a flexible metal catheter connected to a cutting cold loop to remove the lesion. For mucosal lesions with a range of less than 2cm, EMR cold resection surgery can be performed. For mucosal lesions with a range of more than 10cm, EMR thermal resection surgery can be performed. However, the lesions in the mucosa are sometimes multiple and of different sizes, and frequent exchanges of instruments are required during the operation to achieve resection.

[0003] At present, in order to improve the efficiency of surgery, a surgical instrument is used to complete endoscopic mucosal resection surgery. The existing technology integrates the instruments of cold and hot resection surgery into one. By setting a ferrule that can generate heat, and setting a cable to connect the ferrule, the temperature and shape of the ferrule can be changed, so as to achieve cold resection and hot resection of the lesion respectively. Since the ferrule will bear a higher temperature, it is necessary to set a relatively strong insulation material for heat insulation. Therefore, the existing technology uses ceramics and other materials as pipe fittings to accommodate the cable, and sets the ferrule at the mouth of the pipe. Using rigid materials to accommodate the cable will lead to a decrease in the operability of the surgical instrument. A more preferred option is to use flexible pipe fittings such as flexible metal conduits to accommodate the cable, and connect it to an insulating ceramic part to install the ferrule.

[0004] However, since flexible pipes such as flexible metal catheters are difficult to connect firmly with ceramic parts, the two may easily become loose, increasing the risk and difficulty of surgery, thereby affecting the safety of patients. Utility Model Content

[0005] The purpose of the utility model is to provide a stable connection device and a mucosal surgical instrument to alleviate the technical problem in the prior art that flexible pipes such as flexible metal catheters are difficult to be stably connected with ceramic parts, which can easily lead to the loosening of the two, increase the surgical risk, increase the difficulty of the operation, and affect the safety of the patient.

[0006] The utility model provides a stable connection device for limiting a pull cable and a ferrule connected to one end of the pull cable, comprising:

[0007] A front end cap, the front end cap is arranged on one side of the ferrule, and the front end cap is penetrated by a first through hole;

[0008] a flexible metal conduit, wherein the flexible metal conduit is provided with a second through hole;

[0009] A docking joint having a hollow space extending therethrough, one end of the flexible metal conduit extending into the hollow space and connected to one end of the docking joint, the front end cap portion extending into the hollow space and connected to the other end of the docking joint, the first through hole and the second through hole being interconnected so that the cable and the ferrule can pass through the second through hole and the first through hole.

[0010] Furthermore, a first guide structure is provided on the front end cap, the first guide structure is arranged along the axial direction of the first through hole, and a second guide structure is provided on the docking head, and the first guide structure and the second guide structure are arranged to slide relative to each other.

[0011] Further, the first guide structure includes one or more guide bars, and the second guide structure includes one or more guide grooves;

[0012] The guide strip and the guide groove are both arranged along the axial direction of the first through hole, and the guide groove is arranged on the outer wall of the butt joint. The guide groove and the guide strip are arranged on the butt joint in a one-to-one correspondence.

[0013] Furthermore, the flexible metal conduit is configured as a metal spring tube or a hypotube.

[0014] Furthermore, the flexible metal conduit is configured to be formed by connecting a plurality of metal spring tubes and a plurality of rigid metal tubes in series.

[0015] Furthermore, the front end cap is configured to be a polymer heat-resistant insulating material.

[0016] Furthermore, the front end cap is made of ceramic, polytetrafluoroethylene or polyetheretherketone material.

[0017] Furthermore, a first limiting structure is provided on the outer wall of the front end cap, and a second limiting structure is provided on the docking head, and the first limiting structure is snap-fitted with the second limiting structure.

[0018] Furthermore, the first limiting structure includes a clamping block, and the second limiting structure includes a clamping slot;

[0019] An expansion slope is provided on one side of the clamping block close to the docking head, and the expansion slope gradually moves away from the outer wall of the front end cap in a direction away from the docking head. The clamping block can deform the docking head to be engaged with the clamping slot.

[0020] Furthermore, a plurality of the card blocks are evenly arranged along the circumference of the front end cap, and a plurality of the card slots and the card blocks are arranged on the docking head in a one-to-one correspondence.

[0021] Furthermore, the stable connection device also includes an insulating coating, and the insulating coating is coated on the docking head and the flexible metal conduit.

[0022] Further, the flexible metal conduit abuts against the front end cap, and the inner wall of the first through hole is aligned with the inner wall of the second through hole.

[0023] Another aspect of the present invention provides a mucosal surgical instrument, comprising the above-mentioned stable connection device.

[0024] Beneficial effects:

[0025] The utility model provides a stable connection device, including a front end cap, a flexible metal conduit and a docking joint. The front end cap is arranged on one side of the ferrule, the front end cap is penetrated with a first through hole, the flexible metal conduit is provided with a second through hole, the docking joint is penetrated with a hollow space, one end of the flexible metal conduit extends into the hollow space and is connected with one end of the docking joint, the front end cap can partially extend into the hollow space and be connected with the other end of the docking joint, the first through hole and the second through hole are interconnected, so that the cable connected to the ferrule can pass through the second through hole and the first through hole ferrule; by penetrating the hollow space in the docking joint, the docking joint can be connected with the heat-resistant front end cap and the flexible flexible metal conduit respectively, thereby improving the connection stability of the front end cap and the flexible metal conduit, solving the technical problem in the prior art that the flexible pipe fittings such as the flexible metal conduit are difficult to be firmly connected with the ceramic part, thereby easily causing the two to loosen, improving the safety of the mucosal surgical instrument, and ensuring the safety of the patient.

[0026] The utility model provides a mucosal surgical instrument, including a stable connecting device. By arranging the stable connecting device, a flexible metal conduit is used to accommodate a pull cable, thereby improving the flexibility of the pull cable operation. At the same time, the temperature of the ring is isolated by a heat-resistant front end cap, so that the mucosal surgical instrument can realize two surgical methods, namely cold resection and hot resection, thereby improving the efficiency of mucosal resection surgery and reducing the risk of mucosal resection surgery. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1A cross-sectional view of the overall structure of the stable connection device provided by the utility model;

[0029] Figure 2 A schematic diagram of the structure of the front cap in the stable connection device provided by the utility model;

[0030] Figure 3 A schematic diagram of the structure of the butt joint in the stable connection device provided by the utility model;

[0031] Figure 4 A schematic diagram of the structure of the mucosal surgical instrument provided by the utility model;

[0032] Figure 5 This is an overall structural diagram of the stable connection device provided by the utility model.

[0033] icon:

[0034] 10. Secure the connection device;

[0035] 100, front end cap;

[0036] 110, first through hole; 120, guide bar; 140, clamping block;

[0037] 141, expansion slope; 150, outer wall of the front end cap 100;

[0038] 200, docking joint; 210, hollow space; 220, guide groove; 230, clamping groove;

[0039] 300, flexible metal conduit; 310, second through hole;

[0040] 400, insulation coating;

[0041] 500. Ring. DETAILED DESCRIPTION

[0042] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0043] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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 or an electrical 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. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0045] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0046] Embodiment 1

[0047] like Figure 1 and Figure 5 As shown, a stable connection device provided by an embodiment of the utility model is used for a cable and a ferrule 500 connected to one end of the cable to pass through, and includes a front end cap 100, a flexible metal conduit 300 and a butt joint 200. The front end cap 100 is arranged on one side of the ferrule 500, and a first through hole 110 is arranged through the front end cap 100, a second through hole 310 is arranged in the flexible metal conduit 300, and a hollow space 210 is arranged through the butt joint 200, one end of the flexible metal conduit 300 extends into the hollow space 210 and is connected to one end of the butt joint 200, and the front end cap 100 can partially extend into the hollow space 210 and be connected to the other end of the butt joint 200, and the first through hole 110 and the second through hole 310 are communicated with each other, so that the cable and the ferrule 500 can pass through the second through hole 310 and the first through hole 110.

[0048] That is, the stable connection device provided by the embodiment of the utility model, by setting a hollow space 210 through the docking joint 200, so that the docking joint 200 can be connected to the heat-resistant front end cap 100 and the flexible flexible metal conduit 300 respectively, thereby improving the connection stability between the front end cap 100 and the flexible metal conduit 300, solving the technical problem in the prior art that flexible pipes such as the flexible metal conduit 300 are difficult to be stably connected to ceramic parts, which easily leads to the loosening of the two, thereby improving the safety of mucosal surgical instruments and ensuring patient safety.

[0049] Specifically, the front end cap 100 is made of zirconia material, and its molding method can be set to CNC machine turning or sintering. The overall shape of the front end cap 100 is cylindrical. The first through hole 110 is set as a circular hole, coaxially arranged with the front end cap 100 along the axial direction of the front end cap 100, and penetrates the front end cap 100. In this way, the cable can pass through the front end cap 100 and connect with the ferrule 500, so that the doctor can pull the cable to pull part of the ferrule 500 into the first through hole 110, so that the ferrule 500 deforms and shrinks, and completes the cold cutting of the lesion. The butt joint 200 is specifically made of metal material, and its molding method can be set to CNC machine turning or stamping. The shape of the butt joint 200 is also set to be cylindrical, and the hollow space 210 is specifically set to a circular hole. In this way, the front end cap 100 can be extended into the hollow space 210, and the butt joint 200 can be connected to the front end cap 100 by snapping. The flexible metal conduit 300 can also extend into the hollow space 210 and abut against the front end cap 100, and be connected to the docking head 200. The connection method of the flexible metal conduit 300 and the docking head 200 can be selected by laser welding or riveting to ensure the stability of the connection between the flexible metal conduit 300 and the docking head 200. The flexible metal conduit 300 is hollow and is penetrated by a second through hole 310, which is on the outside of the cable. A spring is arranged inside the flexible metal conduit 300 to make the flexible metal conduit 300 have a higher strength, which is convenient for the doctor to adjust the shape of the flexible metal conduit 300. When the cable is connected to the ferrule 500, it can pass through the second through hole 310 and the first through hole 110 in sequence. When the ferrule 500 is powered on and heated, the front end cap 100 can effectively isolate the temperature of the ferrule 500 to avoid damage to the flexible metal conduit 300, and then achieve thermal resection of the patient's lesion through the ferrule 500.

[0050] In other embodiments of the present application, the outer diameter of the front end cap 100 may also be slightly larger than the inner diameter of the docking head 200 , so that after the front end cap 100 is inserted into the docking head 200 , it can be interference-connected with the docking head 200 .

[0051] Preferably, the flexible metal conduit 300 is configured as a metal spring tube or a hypotube.

[0052] Specifically, the flexible metal catheter 300 can be made of a complete medical metal spring tube, which has good elasticity and flexibility, can be easily bent and passed through complex structures, and has good corrosion resistance, and can withstand the erosion of various strong acids and alkalis, thereby ensuring long-term reliability and safety in medical environments. In other embodiments of the present application, the flexible metal catheter 300 can also be made of a hypotube carved from a metal tube. The hypotube has excellent flexibility, can transmit thrust and torque well, and has good anti-kink properties, so that it maintains a complete cross-functional profile when bending around a radius, reducing the difficulty for doctors when using it.

[0053] Furthermore, the flexible metal conduit 300 is configured to be formed by connecting a plurality of metal spring tubes and a plurality of rigid metal tubes in series.

[0054] Specifically, in order to improve the strength of the flexible metal conduit 300, in this embodiment, the flexible metal conduit is made of a plurality of metal spring tubes and a rigid metal tube, and the length and number of the metal spring tubes and the rigid metal tubes can be designed according to actual use requirements. The metal spring tube and the rigid metal tube can be connected by welding. The flexibility of the flexible metal conduit 300 is ensured and the strength of the flexible metal conduit 300 is improved. Preferably, the front end cap 100 is set to a polymer heat-resistant insulating material.

[0055] Specifically, the material of the front end cap 100 is set to a high-molecular high-temperature, high-pressure and high-strength material, so that the front end cap 100 is not conductive. When thermally removing the polyp, the front end cap 100 can effectively isolate the charged flexible metal catheter 300 to improve the safety of the hot and cold snare during thermal cutting.

[0056] Further, the front end cap 100 is configured to be ceramic or polytetrafluoroethylene or polyetheretherketone.

[0057] Specifically, when the front end cap 100 is made of ceramic material, the ceramic material has good insulation, corrosion resistance and heat insulation, which can isolate the high temperature of the ferrule during thermal cutting and ensure that other supporting equipment is not damaged by the current. When the front end cap 100 is made of polytetrafluoroethylene or polyetheretherketone, both of which have good high temperature resistance, corrosion resistance and non-adhesion, they can prevent the front end cap 100 from sticking to human tissues such as blood vessels while ensuring that other supporting equipment is not damaged by the current.

[0058] Furthermore, the flexible metal conduit 300 abuts against the front end cap 100 , and the inner wall of the first through hole 110 is aligned with the inner wall of the second through hole 310 .

[0059] Specifically, the inner diameter of the front end cap 100 and the inner diameter of the flexible metal conduit 300 are set to the same caliber. When the flexible metal conduit 300 and the front end cap 100 are respectively inserted into the docking head 200 and connected to the docking head 200, the flexible metal conduit 300 and the front end cap 100 are in contact with each other, and the inner wall of the flexible metal conduit 300 and the inner wall of the front end cap 100 are also in the same plane, so that the inner wall of the first through hole 110 is aligned with the inner wall of the second through hole 310. In this way, it is ensured that the pull cable can smoothly enter and exit the flexible metal conduit 300 and the front end cap 100 without resistance, thereby improving the operability of the mucosal surgical instrument.

[0060] like Figure 2 and Figure 3 As shown, the stable connection device provided by the embodiment of the utility model has a first guide structure on the front end cap 100, the first guide structure is arranged along the axial direction of the first through hole 110, and a second guide structure is arranged on the docking joint 200, and the first guide structure and the second guide structure are arranged to slide relative to each other.

[0061] Specifically, the first guide structure can be configured as a long groove or a long protrusion, and is arranged along the axial direction of the first through hole 110. Correspondingly, the second guide structure can be configured as a long protrusion or a long groove. The first guide structure and the second guide structure can cooperate with each other to limit and slide relative to each other, so as to prevent the front end cap 100 from extending into the docking head 200 and the front end cap 100 from rotating in the docking head 200 when the connection device is used.

[0062] Furthermore, the first guide structure includes one or more guide bars 120, and the second guide structure includes one or more guide grooves 220; the guide bars 120 and the guide grooves 220 are both arranged along the axial direction of the first through hole 110, and the guide grooves 220 are arranged on the outer wall of the docking head 200, and the guide grooves 220 and the guide bars are arranged on the docking head 200 in a one-to-one correspondence.

[0063] Specifically, the guide bar 120 has a rectangular cross section and is arranged on the outer wall 150 of the front end cap 100 along the axial direction of the front end cap 100. One end of the guide bar 120 extends to the side wall of the front end cap 100 extending into the docking head 200, and the docking head 200 is provided with a guide groove 220 corresponding to the guide bar 120, so that when the front end cap 100 extends into the docking head 200, the guide bar 120 can extend into the guide groove 220 and slide in the guide groove 220. In this way, the front end cap 100 is prevented from extending into the docking head 200 and the front end cap 100 is prevented from rotating in the docking head 200 when the front end cap 100 is extended into the docking head 200 and the connection device is used stably. The size of the guide groove 220 is slightly larger than the size of the guide bar 120, so that the guide bar 120 can be loosely matched with the guide groove 220 after extending into the guide groove 220, so as to facilitate the insertion of the guide bar 120 into the guide groove 220.

[0064] In this embodiment, the guide groove 220 is arranged along the axial direction of the docking joint 200 and penetrates the docking joint 200, so that when the front end cap 100 is extended into the docking joint 200, it can be positioned by the guide groove 220 and the guide strip 120, thereby facilitating the front end cap 100 to extend into the docking joint 200 and connect with the front end cap 100.

[0065] In other embodiments of the present application, Figure 5 As shown, the guide groove 220 may not be set through the docking head 200. In this case, two guide bars 120 may be provided, which are evenly arranged on both sides of the front end cap 100 along the circumference of the front end cap 100, and correspondingly, two guide grooves 220 are also provided on the docking head 200. Thus, the stability of the front end cap 100 in the connector can be further ensured by slidingly connecting the plurality of guide bars 120 with the guide grooves 220.

[0066] In other embodiments of the present application, the first guide structure can be set as a guide groove 220, and the second guide structure can be set as a guide bar 120. The outer diameter of the front end cap 100 is slightly smaller than the inner diameter of the docking head 200. When the front end cap 100 extends into the docking head 200, the guide bar 120 is slidably arranged in the guide groove 220 to prevent the front end cap 100 from extending into the docking head 200 and to stabilize the connection device when the front end cap 100 rotates in the docking head 200. Specifically, in this embodiment, two guide bars 120 are provided, which are evenly arranged on both sides of the front end cap 100 along the circumference of the front end cap 100. Correspondingly, two guide grooves 220 are also provided on the docking head 200. Thus, the stability of the front end cap 100 in the connector can be further ensured by slidingly connecting multiple guide bars 120 with the guide grooves 220.

[0067] Furthermore, a first limiting structure is provided on the outer wall 150 of the front end cap 100 , and a second limiting structure is provided on the docking head 200 , and the first limiting structure is snap-fitted with the second limiting structure.

[0068] Specifically, the first limiting structure can be set as a groove or a protrusion, and the second limiting structure can be set as a corresponding protrusion or groove. Thus, the front end cap 100 can be firmly connected to the docking head 200 through the clamping connection between the first limiting structure and the second limiting structure.

[0069] Furthermore, the first limiting structure includes a block 140, and the second limiting structure includes a slot 230; an expansion slope 141 is provided on the side of the block 140 close to the docking head 200, and the expansion slope 141 gradually moves away from the outer wall 150 of the front end cap 100 from the proximal end to the distal end. The block 140 can cause the docking head 200 to deform so as to engage with the slot 230.

[0070] Specifically, in this embodiment, the side of the stable connection device close to the operator is the proximal end, and the end of the stable connection device away from the operator is the distal end. The clamping block 140 is integrally formed with the front end cap 100 and is arranged in the middle of the outer wall 150 of the front end cap 100. Correspondingly, the clamping groove 230 is arranged at a corresponding position on the docking head 200, and is specifically arranged as a hole with the same shape as the clamping block 140, so that when the front end cap 100 is fully extended into the docking head 200, the clamping block 140 can be clamped in the clamping groove 230. The entire cross section of the clamping block 140 is triangular, and the height of the expansion slope 141 gradually increases from the proximal end to the distal end, and gradually moves away from the outer wall 150 of the front end cap 100. That is, when the front end cap 100 is inserted into the docking head 200, the clamping block 140 can gradually lift up the inner wall of the docking head 200, so that the docking head 200 is deformed, and the inner diameter of the docking head 200 and the width of the guide groove 220 are gradually increased, so that the front end cap 100 can be inserted into the docking head 200. When the front end cap 100 is fully inserted into the docking head 200 and the clamping block 140 is inserted into the clamping groove 230, the docking head 200 will recover its deformation, and the inner diameter of the docking head 200 and the width of the guide groove 220 will be reduced to the original size, so that the docking head 200 and the front end cap 100 are tightly connected, thereby improving the stability of the connection between the docking head 200 and the front end cap 100.

[0071] In other embodiments of the present application, the first limiting structure can be set as a slot 230, and the second limiting structure can be set as a block 140. The entire cross-section of the block 140 is triangular, and the height of the expansion slope 141 gradually decreases in the direction close to the docking head 200. When the front end cap 100 extends into the docking head 200, the block 140 can gradually lift up the inner wall of the docking head 200 to facilitate the front end cap 100 to extend into the docking head 200. When the front end cap 100 is fully extended into the docking head 200 and the block 140 is inserted into the slot 230, the docking head 200 will restore its deformation, and the inner diameter of the docking head 200 and the width of the guide groove 220 will be reduced to their original sizes, so that the docking head 200 and the front end cap 100 are tightly connected, thereby improving the stability of the connection between the docking head 200 and the front end cap 100.

[0072] Furthermore, a plurality of clamping blocks 140 are evenly arranged along the circumference of the front end cap 100 , and a plurality of clamping grooves 230 and the clamping blocks 140 are arranged one-to-one correspondingly with the docking head 200 .

[0073] Specifically, in this embodiment, two clamping blocks 140 are provided, and the two clamping blocks 140 are arranged on both sides of the front end cap 100 along the circumference of the front end cap 100. Correspondingly, two clamping grooves 230 are also provided on the docking head 200. Thus, the stability of the front end cap 100 in the connector can be further ensured by clamping multiple groups of clamping blocks 140 and clamping grooves 230.

[0074] like Figure 1As shown, the stable connection device further includes an insulating coating 400 , and the insulating coating 400 covers the docking head 200 and the flexible metal conduit 300 .

[0075] Specifically, the insulating coating 400 can be coated on the exposed outer walls of the docking joint 200 and the flexible metal conduit 300 by spraying or blueing. When the cable is connected to an external power source, the insulation between the flexible metal conduit 300 and the docking joint 200 and the outside world is ensured, thereby improving the safety of mucosal surgical instruments.

[0076] like Figure 4 As shown, the utility model also provides a mucosal surgical instrument, the above-mentioned stable connection device 10. By providing the stable connection device 10, the flexible metal conduit 300 is used to accommodate the cable, which improves the flexibility of the cable operation, and at the same time, the temperature of the ferrule 500 is isolated by the heat-resistant front end cap 100, so that the mucosal surgical instrument can achieve two surgical methods, cold resection and hot resection, which improves the efficiency of mucosal resection surgery and reduces the risk of mucosal resection surgery.

[0077] Embodiment 2

[0078] In the stable connection device provided in the embodiment of the utility model, only the structure of the joint 200 and the front end cap 100 is different from that of the first embodiment. Therefore, the parts of the present embodiment that are the same as those of the first embodiment will not be described in detail here.

[0079] The front end cap 100 provided in the embodiment of the utility model is set as a whole in a cylindrical shape, and an external thread is set on the outer wall 150 of the front end cap 100, and an internal thread is set at one end of the corresponding docking head 200, and the front end cap 100 can be screwed into the docking head 200 and threadedly connected with the docking head 200. Thus, through the threaded connection between the front end cap 100 and the docking head 200, the temperature of the ferrule 500 is effectively isolated to avoid damage to the flexible metal catheter 300, and then the ferrule 500 is used to achieve thermal resection of the patient's lesion. 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 is described in detail with reference to the above embodiments, ordinary technicians in this field should understand that it is still possible to modify the technical solution recorded in the above embodiments, or to replace part or all of the technical features therein by equivalent; and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiment of the utility model.

Claims

1. A stable connection device for a cable and a ferrule connected to one end of the cable to pass through, characterized in that: include: A front end cap (100), the front end cap (100) being arranged on one side of the ferrule (500), and the front end cap (100) being provided with a first through hole (110); A flexible metal conduit (300), wherein the flexible metal conduit (300) is provided with a second through hole (310); A docking joint (200), wherein the docking joint (200) is penetrated by a hollow space (210), one end of the flexible metal conduit (300) extends into the hollow space (210) and is connected to one end of the docking joint (200), the front end cap (100) partially extends into the hollow space (210) and is connected to the other end of the docking joint (200), and the first through hole (110) and the second through hole (310) are interconnected so that the cable and the ring (500) can pass through the second through hole (310) and the first through hole (110).

2. The stable connection device according to claim 1, characterized in that: The front end cap (100) is provided with a first guide structure, which is arranged along the axial direction of the first through hole (110), and the docking head (200) is provided with a second guide structure, which is arranged to slide relative to the first guide structure.

3. The stable connection device according to claim 2, characterized in that: The first guide structure comprises one or more guide bars (120), and the second guide structure comprises one or more guide grooves (220); The guide strip (120) and the guide groove (220) are both arranged along the axial direction of the first through hole (110), and the guide groove (220) is arranged on the outer wall of the docking head (200), and the guide groove (220) and the guide strip (120) are arranged on the docking head (200) in a one-to-one correspondence.

4. The stable connection device according to any one of claims 1 to 3, characterized in that: The flexible metal conduit (300) is configured as a metal spring tube or a hypotube.

5. The stable connection device according to any one of claims 1 to 3, characterized in that: The flexible metal conduit (300) is configured by sequentially connecting a plurality of metal spring tubes and a plurality of rigid metal tubes in series.

6. The stable connection device according to any one of claims 1 to 3, characterized in that: The front end cap (100) is made of a polymer heat-resistant insulating material.

7. The stable connection device according to claim 6, characterized in that: The front end cap is made of ceramic, polytetrafluoroethylene or polyetheretherketone material.

8. The stable connection device according to any one of claims 1 to 3, characterized in that: A first limiting structure is provided on the outer wall (150) of the front end cap (100), and a second limiting structure is provided on the docking head (200), and the first limiting structure is snap-fitted with the second limiting structure.

9. The stable connection device according to claim 8, characterized in that: The first limiting structure comprises a clamping block (140), and the second limiting structure comprises a clamping slot (230); The proximal end of the clamping block (140) is provided with an expansion slope (141), and the expansion slope (141) gradually moves away from the outer wall (150) of the front end cap (100) from the proximal end to the distal end. The clamping block (140) can cause the docking head (200) to deform so as to be clamped with the clamping groove (230).

10. The stable connection device according to claim 9, characterized in that: The plurality of clamping blocks (140) are evenly arranged along the circumference of the front end cap (100), and the plurality of clamping grooves (230) are arranged on the docking head (200) in a one-to-one correspondence with the clamping blocks (140).

11. The stable connection device according to any one of claims 1 to 3, characterized in that: The stable connection device further comprises an insulating coating (400), wherein the insulating coating (400) covers the butt joint (200) and the flexible metal conduit (300).

12. The stable connection device according to any one of claims 1 to 3, characterized in that: The flexible metal conduit (300) is in contact with the front end cap (100), and the inner wall of the first through hole (110) is aligned with the inner wall of the second through hole (310).

13. A mucosal surgical instrument, characterized in that: It comprises a stable connection device (10) as claimed in any one of claims 1 to 12.

Images