Surgical instrument under endoscope and endoscope

Abstract

The invention provides an endoscopic surgical instrument and an endoscope, belongs to the field of medical instruments, and aims at solving the problem that a handle is too long or too thick due to the fact that an adjusting assembly of a surgical instrument in the prior art is complex in structure. The device comprises a handle, an adjusting assembly, a catheter, an adjustable bending assembly and two traction wires, an adjusting knob is rotatably arranged on a handle, a first thread and a second thread which are opposite in thread screwing direction are arranged on the inner side of the adjusting knob, two traction wire connecting pieces which can slide in the axial direction of the handle and are connected with traction wires are arranged on the handle, and the screwing directions of external threads of the two traction wires are opposite. Therefore, no matter the adjusting knob rotates clockwise or anticlockwise relative to the axial direction of the handle, the adjusting knob can synchronously drive the two traction wire connecting pieces to move, that is, the adjusting assembly provided by the invention is simple in structure, the diameter and the length of the assembled handle are reduced, a user can hold the handle conveniently, and the manufacturing cost of the surgical instrument is also reduced.

Description

Technical Field

[0001] The present invention belongs to the field of medical devices, and particularly relates to a surgical instrument under endoscope and an endoscope. Background Art

[0002] Endoscopic submucosal dissection (ESD) is a minimally invasive treatment technique. Its core operation is to layer by layer dissect the lesion and the normal submucosa beneath it through endoscopic guidance using a dedicated surgical instrument such as a high-frequency electric knife, so as to achieve en bloc resection of the diseased tissue. With its significant advantages such as small trauma, less bleeding, and rapid postoperative recovery, this technique has become the preferred treatment method for early mucosal cancer and submucosal benign tumors in the digestive tract. During the ESD operation, the surgical instrument plays a crucial role. Through effective tissue traction, it can not only clearly expose the uncut area for precise operation of the electric knife, but also significantly improve the safety, efficiency, and operational convenience of the operation.

[0003] The distal end of the surgical instrument is usually provided with operating components such as a traction clip for tissue traction or an electric knife for cutting diseased tissue, and an adjustable bending component for changing the spatial position of the operating components. The proximal end of the surgical instrument is usually provided with an adjusting component for driving the adjustable bending component to move. The adjusting component is usually connected to the adjustable bending component through two spaced traction guide wires. When the adjusting component moves, it drives one of the traction guide wires to move towards the distal end of the surgical instrument and drives the other traction guide wire to move towards the proximal end of the surgical instrument, so as to use the adjustable bending component to change the spatial position of the operating components for corresponding surgical operations on the tissue. However, the existing adjusting component has a relatively complex structure, resulting in the surgical instrument being too long or too thick, which is not only inconvenient for the surgeon to hold, but also takes a long time to assemble the adjusting component, increasing the manufacturing cost of the surgical instrument. Summary of the Invention

[0004] In view of the above-mentioned disadvantages of the prior art, the purpose of the present invention is to provide a surgical instrument, a surgical instrument under endoscope, and an endoscope, which are used to solve the problem that the complex structure of the adjusting component of the surgical instrument in the prior art leads to the handle being too long or too thick.

[0005] To achieve the above and other related objectives, the present invention provides an endoscopic surgical instrument, comprising: a handle, an adjustment assembly, a catheter, an adjustable bending assembly, and two guiding wires; the adjustable bending assembly is connected to the handle through the catheter; the adjustment assembly is rotatably arranged on the handle; the guiding wires are arranged inside the catheter, the proximal ends thereof are located inside the inner cavity of the handle and are connected to the adjustment assembly, and the distal ends are connected to the adjustable bending assembly; the adjustment assembly includes an adjustment knob and two guiding wire connectors; the guiding wire connectors are slidably connected to the handle in the axial direction of the handle, and each guiding wire connector is connected to a guiding wire; the adjustment knob is rotatably connected to the handle; external threads are respectively arranged on the outer side walls of the two guiding wire connectors, and the helix directions of the external threads of the two guiding wire connectors are opposite; internal threads with opposite helix directions are arranged on the inner side wall of the adjustment knob, the adjustment knob is connected to the external thread of one of the guiding wires through the first thread and is connected to the external thread of the other guiding wire through the second thread; the first thread and the second thread are arranged alternately on the inner side wall of the adjustment knob.

[0006] Optionally, the adjustment assembly further includes a catheter connector, at least a part of the catheter connector is arranged inside the inner cavity of the handle, the catheter connector includes a first traction hole penetrating through the axial direction of the catheter connector for the guiding wire to pass through, and two avoidance openings that are opposite and spaced apart on the side wall of the catheter connector and are communicated with the first traction hole, the avoidance openings are arranged in one-to-one correspondence with the guiding wires; the proximal ends of the two guiding wires respectively pass through the corresponding avoidance openings and are connected to the corresponding guiding wire connectors.

[0007] Optionally, the handle includes two first chutes that are opposite and spaced apart on the side wall of the handle and are communicated with the inner cavity, the avoidance openings, the first chutes, and the guiding wires are arranged in one-to-one correspondence; a protruding member for passing through the first chute is arranged on each guiding wire connector, and the guiding wire is connected to the protruding member.

[0008] Optionally, the adjustable bending assembly includes a snake tube, the snake tube includes a first fixing member, a second fixing member, and a plurality of rotating joints arranged between the first fixing member and the second fixing member, the distal end of the first fixing member is connected to the operating assembly, the proximal end is hinged to the adjacent rotating joint, the distal end of the second fixing member is hinged to the adjacent rotating joint, and the proximal end is connected to the catheter; the guiding wire is arranged inside the first fixing member, the plurality of rotating joints, and the second fixing member, and the distal end thereof is connected to the first fixing member; the rotating joint includes a connecting ring, a first hinge groove at least partially protruding from the distal end of the connecting ring, and a first hinge member at least partially protruding from the proximal end of the connecting ring and adapted to the first hinge groove, and the included angle β formed by the inner side wall of the first hinge groove and the straight line a perpendicular to the center line of the connecting ring is greater than or equal to 0° and less than 90°.

[0009] Optionally, the included angle β formed by the inner side wall of the first hinge groove and the straight line a perpendicular to the center line of the connecting ring is 10 - 80°.

[0010] Optionally, the bendable component further includes a braided mesh sleeved outside the coiled tube; alternatively, the bendable component further includes a rubber tube sleeved outside the coiled tube; alternatively, the bendable component further includes a braided mesh sleeved outside the coiled tube and a rubber tube sleeved outside the braided mesh.

[0011] Optionally, a spring tube is sleeved outside the guide wire, and the spring tube is arranged inside the catheter; the distal end of the spring tube is connected to the second fixing member or the inner side wall of the distal end of the catheter, and the proximal end of the spring tube is connected to the inner side wall of the proximal end of the catheter or the distal end of the handle.

[0012] Optionally, the bendable component includes a first inner tube, a braided mesh sleeved on the first inner tube, and a first outer tube sleeved outside the braided mesh; the distal end of the first inner tube is connected to the operating component, and the proximal end of the first inner tube is connected to the catheter; the guide wire is connected to the distal end of the first inner tube.

[0013] Optionally, the guide wire is located between the braided mesh and the first inner tube, and the guide wire is axially staggered from the intersection points of the braided wires forming the braided mesh.

[0014] On the other hand, the present invention also provides an endoscope, including a receiving member and an endoscope, the endoscope is arranged inside the receiving member, the receiving member further includes two instrument channels, and at least one instrument channel is used to accommodate an endoscopic surgical instrument as described above; when viewed in a cross-section perpendicular to the axial direction of the receiving member, the endoscope is located at the center of the receiving member, and the endoscope and the two instrument channels are arranged in a triangular shape in this cross-section.

[0015] As described above, an endoscopic surgical instrument and an endoscope of the present invention have at least the following beneficial effects: by rotatably arranging an adjustment knob on the handle, a first thread and a second thread with opposite thread directions are arranged inside the adjustment knob, two guide wire connectors that can slide along the axial direction of the handle and are connected to the guide wire are arranged on the handle, external threads are arranged on the two guide wire connectors, and the spiral directions of the two guide wires are opposite. Thus, no matter whether the adjustment knob rotates clockwise or counterclockwise relative to the axial direction of the handle, it can synchronously drive the two guide wire connectors to move, and further realize the movement of the bendable component. The adjustment component provided by the present invention has a simple structure, reduces the diameter and length of the handle after assembly, is convenient for users to hold, and also reduces the manufacturing cost of the surgical instrument. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It shows a schematic diagram of the overall structure of an endoscopic surgical instrument of the present invention.

[0017] Figure 2 It shows a schematic diagram of the structure of an endoscopic surgical instrument of the present invention with the second sub-knob omitted.

[0018] Figure 3 Shown is a partially cutaway schematic diagram of a handle of an endoscopic surgical instrument according to the present invention.

[0019] Figure 4 Shown is a schematic structural diagram of a first sub-knob of an endoscopic surgical instrument of the present invention.

[0020] Figure 5 Shown is a schematic structural diagram of a traction wire connector of an endoscopic surgical instrument of the present invention.

[0021] Figure 6 Shown is a schematic structural diagram of a catheter connector of an endoscopic surgical instrument according to the present invention.

[0022] Figure 7 Display as Figure 1 An enlarged schematic diagram of point A.

[0023] Figure 8 The figure shows a schematic structural diagram of a rotating joint of a coiled tube of an endoscopic surgical instrument according to the present invention at an angle.

[0024] Figure 9 Shown is a schematic structural diagram of a rotating joint of a coiled tube of an endoscopic surgical instrument according to the present invention from another angle.

[0025] Figure 10 Displayed as Figure 9 Schematic diagram of the structure of the rotating joint after cutting along the cutting line AA.

[0026] Figure 11 Shown is a simplified structural diagram of an endoscopic surgical instrument of the present invention, in which a braided mesh and a rubber tube are arranged outside a coiled tube.

[0027] Figure 12 Shown is a structural schematic diagram of an implementation form of a catheter of an endoscopic surgical instrument of the present invention.

[0028] Figure 13 Shown is a structural schematic diagram of another implementation form of a catheter of an endoscopic surgical instrument of the present invention.

[0029] Figure 14 Shown is a structural schematic diagram of another implementation form of an adjustable bending component of an endoscopic surgical instrument of the present invention.

[0030] Figure 15 Display as Figure 13 An enlarged schematic diagram of point B.

[0031] Figure 16 Shown is a partial structural schematic diagram of an implementation method of an endoscope of the present invention.

[0032] Figure 17 Shown is a partial structural schematic diagram of another implementation of an endoscope according to the present invention.

[0033] Figure 18 Shown is a simplified schematic diagram of a cross-section of a receiving member of an endoscope according to the present invention perpendicular to its axial direction.

[0034] Element number description: 1. Handle, 11. Limiting section, 111. First limiting step, 112. Second limiting step, 12. First sliding groove, 13. First receiving cavity, 14. Second receiving cavity, 15. Second sliding groove; 2. Control assembly; 3. Adjusting assembly, 31. Adjusting knob, 311. First sub-knob, 3111. First avoiding portion, 3112. Second avoiding portion, 3113. First limiting portion, 3114. Fixed tongue, 3115. First clamping block, 3116. Second clamping block, 312. First sub-knob, 313. First thread, 314. Second thread, 32. Traction wire connecting member, 321. External thread, 322. Protruding member, 323. Sliding member body, 33. Duct connecting member, 331. First traction hole, 332. Avoiding opening, 333. First limiting member, 334. Second limiting member; 4. Duct, 41. Threaded pipe, 42. Spring pipe, 43. Second inner pipe, 44. Second outer pipe; 5. Adjustable bending assembly, 51. Snake pipe, 511. First fixing member, 512. Second fixing member, 513. Rotating joint, 5131. Connecting ring, 5132. First lug, 51321. First limiting surface, 51322. Second limiting surface, 51323. Third limiting surface, 5133. First hinge member, 5134. First receiving groove, 5135. Second lug, 5136. First hinge groove, 5137. Second receiving groove, 5138. Guide member, 52. Braided net, 521. Interlacing point, 53. Rubber tube, 54. First inner pipe, 55. First outer pipe; 6. Traction wire; 7. Operating assembly; 8. Receiving member, 81. Instrument channel, 82. Outer shell, 83. Fixed shell; 9. Endoscope; 10. Proximal end, 20. Distal end, 30. First side, 40. Second side. Detailed implementation manners

[0035] The following specific embodiments illustrate the implementation manners of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0036] Please refer to all the following attached drawings. It should be noted that the structures, proportions, sizes, etc. shown in the attached drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in this technology to understand and read, and are not used to limit the conditions under which the present invention can be implemented. Therefore, they do not have any substantial technical significance. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle", and "one" cited in this specification are only for the convenience of clear description and are not used to limit the scope of implementation of the present invention. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope within which the present invention can be implemented.

[0037] The terms "distal end" and "proximal end" used in the present invention are only for better understanding the solution of the present invention and cannot be construed as limitations of the present invention. Generally, during the use of an endoscope, the distal end part of a surgical instrument or the endoscope will extend into the human body, while the proximal end part of the surgical instrument or the endoscope will remain outside the human body for the operator to hold and perform relevant operations. Therefore, the "distal end" can be understood as the part of a certain part or component in the surgical instrument that is relatively closer to the inside of the human body, and the "proximal end" can be understood as the part of a certain part or component in the surgical instrument that is relatively closer to the outside of the human body.

[0038] The following various embodiments are only for illustration purposes. Combinations can be made between the various embodiments, and it is not limited to the content shown in the following single embodiment.

[0039] Please refer to Figures 1-3 , a surgical instrument provided by the present invention includes a handle 1, a control component 2, an adjustment component 3, a catheter 4, an adjustable bending component 5, and an operation component 7. The distal end 20 of the adjustable bending component 5 is connected to the operation component 7, the proximal end 10 is connected to the catheter 4, the proximal end 10 of the catheter 4 is connected to the handle 1, and the adjustment component 3 and the control component 2 are arranged at intervals on the handle 1.

[0040] The operation component 7 can be a traction clip for traction of tissues, an electrocautery for cutting tissues, etc. Of course, it can also be other structures for performing corresponding operations on tissues during the operation. This embodiment does not limit this.

[0041] The catheter 4 is a hollow cylindrical structure. Inside it, there is a regulating component 3 for threading a guiding wire 6 of the adjustable bending component 5, and a control component 2 for threading a control wire for controlling the operation component 7 to perform corresponding operations. The guiding wire 6 and the control wire can be filamentous structures made of metal, such as steel wires, tungsten wires, etc., or can also be traction cables made of polymer materials; the control wire can be an energy transmission line for supplying energy to the operation component 7, such as an electric wire, etc. In this embodiment, there are two guiding wires 6. Both of the two guiding wires 6 are threaded inside the catheter 4. Their distal ends 20 are respectively connected to the adjustable bending component 5, and their proximal ends 10 are located inside the cavity of the handle 1 and are connected to the regulating component 3.

[0042] Please refer to Figures 1-4 , the regulating component 3 may include a regulating knob 31 and two guiding wire connectors 32; the guiding wire connectors 32 are slidably connected to the handle 1 in the axial direction of the handle 1. Each guiding wire connector 32 is connected to a guiding wire 6; the regulating knob 31 is rotatably connected to the handle 1; external threads 321 are respectively provided on the outer side walls of the two guiding wire connectors 32, and the helix directions of the external threads 321 of the two guiding wire connectors 32 are opposite; on the inner side wall of the regulating knob 31, there are first threads 313 and second threads 314 with opposite helix directions. The regulating knob 31 is connected to the external thread 321 of one of the guiding wires 6 through the first thread 313 and is connected to the external thread 321 of the other guiding wire 6 through the second thread 314; the first thread 313 and the second thread 314 are staggered on the inner side wall of the regulating knob 31.

[0043] The handle 1 can be a cylindrical structure, and a limiting section 11 for restricting the regulating knob 31 from moving in the axial direction of the handle 1 is provided on its outer side wall. As Figure 2 shown, a smaller-diameter limiting section 11 is formed by concave inward on the outer side of the handle 1. A first limiting step 111 is formed at the distal end 20 of the limiting section 11, and a second limiting step 112 is formed at the proximal end 10. After the regulating knob 31 is arranged on the limiting section 11, due to the abutting effect of the first limiting step 111, the distal end 20 of the regulating knob 31 will not move axially along the handle 1 towards the distal end 20 of the handle 1, and due to the limiting effect of the second limiting step 112, the proximal end 10 of the regulating knob 31 will not move axially along the handle 1 towards the proximal end 10 of the handle 1.

[0044] The regulating knob 31 can be a hollow cylindrical structure formed by combining a first sub-knob 311 and a second sub-knob. The first sub-knob 311 and the second sub-knob can be connected together by means of clamping or welding, etc.

[0045] In this embodiment, as Figure 4As shown, the first sub-knob 311 and the second sub-knob have the same structure. Taking the first sub-knob 311 as an example for illustration. On the first side 30 where the first sub-knob 311 is connected to the second sub-knob, there are a first avoidance portion 3111, a second avoidance portion 3112, a first limiting portion 3113 protrudes, and a fixing tongue 3114 protruding from the first limiting portion 3113. The first avoidance portion 3111 and the second avoidance portion 3112 are avoidance structures formed by cutting part of the material from the outer wall of the first side 30 of the first sub-knob 311. A first clamping block 3115 is provided on the first avoidance portion 3111. The first limiting portion 3113 is a limiting structure formed by cutting part of the material from the inner wall of the first sub-knob 311, and the fixing tongue 3114 is a limiting structure formed by cutting part of the material on the first limiting portion 3113. A second clamping block 3116 is provided on the side wall of the fixing tongue 3114 facing the other end of the first sub-knob 311. Correspondingly, the second side 40 of the first sub-knob 311 is also provided with a first avoidance portion 3111, a second avoidance portion 3112, a first limiting portion 3113 protrudes, and a fixing tongue 3114 protruding from the first limiting portion 3113, and a first clamping block 3115 is also provided on the first avoidance portion 3111, and a second clamping block 3116 is also provided on the fixing tongue 3114. Thus, after connecting the first sub-knob 311 and the second sub-knob together, the second clamping block 3116 on the first fixing tongue 3114 of the second sub-knob is clamped with the first clamping block 3115 on the first avoidance portion 3111 of the first sub-knob, the inner wall of the first fixing tongue 3114 of the second sub-knob abuts against the outer wall of the first avoidance portion 3111 of the first sub-knob, the inner wall of the first limiting portion 3113 of the second sub-knob abuts against the outer wall of the second avoidance portion 3112 of the first sub-knob, the outer wall of the first avoidance portion 3111 of the second sub-knob abuts against the inner wall of the first fixing tongue 3114 of the first sub-knob, and the first clamping block 3115 on the first avoidance portion 3111 of the second sub-knob and the second clamping block 3116 on the first fixing tongue 3114 of the first sub-knob are clamped. Through the above settings, it is ensured that the first sub-knob 311 and the second sub-knob will not separate.

[0046] As Figures 2-3 shown in FIGS. 5, on the inner wall of the lead guiding connector 32, a protruding member 322 may be provided. The protruding member 322 may be a convex block. On the limiting section 11 of the handle 1, two first sliding grooves 12 may be provided. Each sliding groove corresponds to a lead guiding connector 32. The protruding member 322 passes through the first sliding groove 12 and is connected to the proximal end 10 of the lead 6, for example, by welding, clamping or other means. There is a clearance fit between the protruding member 322 and the inner wall of the sliding groove, so that the lead 6 and the handle 1 can be slidably connected on the axis of the handle 1.

[0047] In use, when the adjustment knob 31 is rotated, due to the opposite helix directions of the first thread 313 and the second thread 314, and the opposite helix directions of the threads of the two lead wire connectors 32, no matter whether the adjustment knob 31 is rotated clockwise or counterclockwise, one of the lead wire connectors 32 moves towards the distal end 20, and the other lead wire connector 32 moves towards the proximal end 10, thereby bending the adjustable bending assembly 5. It can be understood that the structures and set lengths of the first thread 313 and the second thread 314 on the inner side wall of the adjustment knob 31 are the same, only the helix directions are different.

[0048] As Figure 2 , 6 shown, the adjustment assembly 3 further includes a catheter connector 33. The catheter connector 33 is disposed in the inner cavity of the handle 1. The catheter connector 33 includes a first traction hole 331 axially penetrating the catheter connector 33 for the lead wire 6 and the control wire to pass through, and two opposite and spaced-apart avoidance openings 332 provided on the side wall of the catheter connector 33 and communicating with the first traction hole 331. The avoidance openings 332 are arranged in one-to-one correspondence with the lead wires 6; the proximal ends 10 of the two lead wires 6 respectively pass through the correspondingly arranged avoidance openings 332 and are connected to one of the lead wire connectors 32. The avoidance openings 332, the first chute 12, and the lead wires 6 are arranged in one-to-one correspondence.

[0049] A first through hole for the catheter connector 33 to pass through may be provided at the distal end 20 of the handle 1. The inner cavity of the handle 1 may include a first accommodation cavity 13 and a second accommodation cavity 14. The first through hole communicates the first accommodation cavity 13 with the outside. A second through hole for the control wire of the operation assembly 7 to pass through may also be provided between the first accommodation cavity 13 and the second accommodation cavity 14.

[0050] The catheter connector 33 may be a cylindrical structure or a square structure as Figure 6 shown. A first limiting member 333 and a second limiting member 334 are provided on its outer side. The first limiting member 333 and the second limiting member 334 may be limiting blocks or limiting rings protruding from the outer side wall of the catheter connector 33. The first limiting member 333 is used to abut against the side wall at the distal end 20 of the first accommodation cavity 13 to prevent the catheter connector 33 from moving axially along the handle 1 towards the distal end 20 of the handle 1. The second limiting member 334 is used to abut against the side wall at the proximal end 10 of the first accommodation cavity 13 to prevent the catheter connector 33 from moving axially along the handle 1 towards the proximal end 10 of the handle 1. The two avoidance openings 332 are provided between the first limiting member 333 and the second limiting member 334.

[0051] The first chute 12 provided on the handle 1 is located on the limiting section 11 of the handle 1. A second chute 15 is also provided on the limiting section 11, and the first chute 12 communicates with the second chute 15. The lead wire connecting member 32 may further include a sliding member body 323 slidably connected to the second chute 15. A protrusion 322 is provided on the inner side of the sliding member body 323, and a thread is provided on the outer side of the sliding member body 323. The thickness of the sliding member body 323 is less than or equal to the depth of the second chute 15, so that the outer side wall of the sliding member body 323 does not protrude beyond the outer side wall of the handle 1, which facilitates the threaded connection between the adjusting knob 31 and the thread provided on the sliding member body 323, and reduces the overall diameter of the handle 1 after the adjusting assembly 3 is provided on the handle 1.

[0052] As Figure 1 , 7 -10 shows that in one embodiment, the adjustable bending assembly 5 may include a snake tube 51. The snake tube 51 may include a first fixing member 511, a second fixing member 512, and a plurality of rotating joints 513. The distal end  20 of the first fixing member 511 is connected to the operating assembly 7, and the proximal end 10 is hinged to the adjacent rotating joint 513; the distal end 20 of the second fixing member 512 is hinged to the adjacent rotating joint 513, and the proximal end 10 is connected to the catheter 4. The lead wire 6 is threaded through the first fixing member 511, the plurality of rotating joints 513, and the second fixing member 512. Its distal end 20 is connected to the first fixing member 511, and a plurality of rotating members are arranged between the first fixing member 511 and the second fixing member 512.

[0053] The rotating joint 513 includes a connecting ring 5131. Two sets of first lug ears 5132 are provided at the distal end of the connecting ring 5131. Each set of first lug ears 5132 includes two relatively and spaced-apart first lug ears 5132. A fan-shaped first hinge member 5133 is provided between each set of first lug ears 5132. As Figure 9As shown in the figure, first receiving grooves 5134 are respectively formed between the left side and the right side of the first hinge member 5133 and the adjacent first lugs 5132. Two sets of second lugs 5135 are provided at the proximal end of the connecting ring 5131. Each set of second lugs 5135 includes two relatively and spaced second lugs 5135. A first hinge groove 5136 adapted to the first hinge member 5133 is provided between the two relatively and spaced second lugs 5135 of each set of second lugs 5135. A second receiving groove 5137 for receiving one first lug 5132 is provided between the outer side surface of each second lug 5135 and the proximal end of the connecting ring 5131. The first receiving groove 5134 is used to receive the second lug 5135. The meaning of "adapted" referred to herein is that the outer shape of the first hinge member 5133 matches the outer shape of the first hinge groove 5136. When the first hinge member 5133 is disposed in the first hinge groove 5136, the first hinge member 5133 and the first hinge groove 5136 are in clearance fit, so that the first hinge member 5133 can rotate in the first hinge groove 5136.

[0054] In this embodiment, by providing two sets of first lugs 5132 at the distal end of the connecting ring 5131, two first receiving grooves 5134 and the first hinge member 5133 are provided between each set of first lugs 5132, two sets of second lugs 5135 are provided at the proximal end of the connecting ring 5131, the first hinge groove 5136 is provided between each set of second lugs 5135, and the second receiving groove 5137 is provided between the outer side of the second lug 5135 and the connecting ring 5131. When in use, the contact area between adjacent connecting rotating joints 513 is increased, and the strength of the coiled tube 51 is improved.

[0055] Define that the distal side surface of the first lug 5132 is the first limiting surface 51321, and the first limiting surface 51321 is arranged towards another first lug 5132 in the same group. The included angle β formed by the first limiting surface 51321 and the straight line a perpendicular to the center line of the connecting ring 5131 is greater than or equal to 0° and less than 90°. The outer side wall of the first lug 5132 away from the first hinge 5133 is the second limiting surface 51322, the second limiting surface 51322 is arc-shaped, and the included angle β formed by the second limiting surface 51322 and the straight line a perpendicular to the center line of the connecting ring 5131 is greater than or equal to 0° and less than 90°. The inner side wall of the first lug 5132 towards the first hinge 5133 is the third limiting surface 51323, that is, the side surface of the first receiving groove 5134 away from the side towards the first hinge 5133. The third limiting surface 51323 is also arc-shaped, and the included angle β formed by the third limiting surface 51323 and the straight line a perpendicular to the center line of the connecting ring 5131 is greater than or equal to 0° and less than 90°. The bottom of the first receiving groove 5134 and the outer side surface of the first hinge 5133 form an included angle β greater than or equal to 0° and less than 90° with the straight line a perpendicular to the center line of the connecting ring 5131. That is, the first limiting surface 51321, the second limiting surface 51322, the third limiting surface 51323, the bottom of the first receiving groove 5134 and the outer side surface of the first hinge 5133 are side surfaces formed by cutting along the radial direction of the connecting ring 5131 or cutting at a certain angle with the radial direction of the connecting ring 5131. Correspondingly, the inner side surface of the second lug 5135 and the proximal end of the second lug 5135, the bottom of the second receiving groove 5137 and the two inner side surfaces also form an included angle β greater than or equal to 0° and less than 90° with the straight line a perpendicular to the center line of the connecting ring 5131.

[0056] The proximal end of the first fixing member 511 has the same structure as the proximal end of the connecting ring 5131, and the distal end of the second fixing member 512 has the same structure as the distal end of the connecting ring 5131. Thus, the first fixing member 511 can be hinged to the adjacent rotating joint 513, and the second fixing member 512 can be hinged to the adjacent rotating joint 513.

[0057] The included angles β formed by the first limiting surface 51321, the second limiting surface 51322, the third limiting surface 51323, the bottom of the first receiving groove 5134, the outer side surface of the first hinge member 5133, the corresponding side surface of the proximal end of the first fixing member 511, the corresponding side surface of the distal end of the second fixing member 512, and the corresponding side surface of the proximal end of the connecting ring 5131 with a straight line a perpendicular to the center line of the connecting ring 5131 can be 10 - 80°, such as 0°, 10°, 15°, 20°, 25°, 30°, 35°, 40°, 45°, 50°, 55°, 60°, 65°, 70°, 75°, 80°, preferably 30 - 60°, so as to ensure that the adjacent connecting rings 5131, the connecting ring 5131 and the first fixing member 511, and the connecting ring 5131 and the second fixing member 512 will not be disengaged from the hinge during use, ensuring that the coiled tube 51 can be used normally. Since the included angle β formed by the above-mentioned side surface and the straight line a perpendicular to the center line of the connecting ring 5131 is greater than or equal to 0° and less than 90°, the coiled tube 51 can be processed by laser cutting or other methods with the same tubular structure. After the processing is completed, the coiled tube 51 can be formed, avoiding the need to use riveting or clamping methods to form the coiled tube 51, and reducing the manufacturing cost. In this embodiment, the coiled tube 51 is made of a metal material. The first fixing member 511 of the coiled tube 51 is connected to the proximal end of the operating component by welding. The guiding wire is also made of a metal material, and its distal end is connected to the inner side wall of the first fixing member 511 by welding. The catheter is also made of a metal material. The second fixing member 512 and the catheter are also made by welding. In other implementation manners, the coiled tube 51, the guiding wire, and the catheter can also be made of other materials, such as plastic and other materials. At this time, the coiled tube 51 and the guiding wire, the coiled tube 51 and the operating component, and the coiled tube 51 and the catheter can be connected by bonding or other methods. This embodiment does not limit this.

[0058] Define the rotatable angle between adjacent rotating joints 513, between the first fixing member 511 and adjacent rotating joints 513, and between the second fixing member 512 and adjacent rotating joints 513 as α. When the snake tube 51 is not rotated, that is, when the central lines of the rotating joints 513, the first fixing member 511, and the second fixing member 512 of the snake tube 51 coincide, the included angle formed between the connecting line b of the first limiting surface 51321 of the first lug 5132 and the rotation center of the first hinge member 5133 and the connecting line c of the bottom of the second receiving groove 5137 and the rotation center of the first hinge member 5133 is θ, where θ is greater than α. In this way, no matter how the snake tube 51 rotates, there will be no abutment between the first limiting surface 51321 of the first lug 5132 and the bottom of the second receiving groove 5137, avoiding the breakage of the connection between the first hinge groove 5136 and the connecting ring 5131 due to the abutment between the first limiting surface 51321 and the bottom of the second receiving groove 5137 during the rotation process, thereby causing damage to the rotating joint 513 of the snake tube 51 and affecting the normal use of the adjustable bending assembly 5.

[0059] The distal end and the proximal end of the connecting ring 5131 are respectively of V-shaped structures, and the V-shaped structures at the proximal end and the distal end are the same, that is, the V-shaped structure is formed between the first lug 5132 and another set of adjacent first lugs 5132, and the V-shaped structure is formed between the second lug 5135 and another set of adjacent second lugs 5135. Hereinafter, the V-shaped structure at the distal end of the connecting ring 5131 is taken as an example for illustration. Define the two surfaces of the V-shaped structure as the fourth limiting surface and the fifth limiting surface respectively, and the fourth limiting surface and the fifth limiting surface are respectively inclined surfaces. The fourth limiting surface and the fifth limiting surface are respectively arranged facing the rotation center of the adjacent first hinge member 5133.

[0060] By respectively arranging the proximal end and the distal end of the connecting ring 5131 as V-shaped structures, when the snake tube 51 rotates, when two adjacent rotating joints 513 rotate, the fourth limiting surface and the fifth limiting surface of the V-shaped structure at the proximal end of one rotating joint 513 and the V-shaped structure at the distal end of another adjacent rotating joint 513 can be in contact simultaneously. In this way, when the snake tube 51 rotates, the contact area between the first fixing member 511 and adjacent rotating joints 513, between adjacent rotating joints 513, and between the second fixing member 512 and adjacent rotating joints 513 is increased, avoiding damage to the rotating joint 513, the first fixing member 511, or the second fixing member 512 due to single-point force.

[0061] Two spaced guiding members 5138 for guiding the guiding wire 6 can also be arranged inside the connecting ring 5131. The guiding members 5138 can be such as Figure 8 、 10The two ends shown are connected to the inner wall of the connecting ring 5131 , and the middle part of the connecting strip is bent. The connecting strip and the inner wall of the connecting ring 5131 form a fan-shaped space for guiding the traction wire 6 .

[0062] like Figure 11 As shown, the adjustable bend assembly 5 may further include a braided mesh 52 sleeved on the outside of the coiled tube 51, or may further include a rubber tube 53 sleeved on the outside of the coiled tube 51. Of course, the adjustable bend assembly 5 may also include both the braided mesh 52 sleeved on the outside of the coiled tube 51 and the rubber tube 53 sleeved on the outside of the coiled tube 51, in which case the braided mesh 52 is located between the coiled tube 51 and the rubber tube 53. The braided mesh 52 and the rubber tube 53 may be fixed to the outer wall of the coiled tube by bonding or interference fit. In this embodiment, by providing the braided mesh 52, the rubber tube 53, or a combination of the braided mesh 52 and the rubber tube 53 on the outside of the coiled tube, the structural strength of the adjustable bend assembly is increased.

[0063] The catheter 4 may be a multi-lumen tube, that is, a plurality of threading tubes 41 connected to the inner wall of the catheter 4 are provided in the catheter 4 for the traction wire 6 and / or the control wire to pass through. Figure 12 As shown, the inner wall of the catheter 4 is provided with four threading tubes 41 arranged in an array, and the outer walls of the threading tubes 41 are connected to the inner wall of the catheter 4. Two of the threading tubes 41 are used to pass the traction wires 6, and the other two threading tubes 41 are used to pass the control wires. At this time, the distal ends 20 of the control wires and the traction wires 6 pass through the distal ends 20 of the threading tubes 41 and are connected to the corresponding control components 2 or first fixing members 511. By configuring the catheter 4 as a multi-lumen tube, the traction wires 6 and the control wires are prevented from interfering with each other within the catheter 4, and the wires are prevented from becoming entangled in the tube lumens and affecting the use of the device. At the same time, assembly and use are facilitated.

[0064] The catheter 4 can also be a straight tube with a cylindrical channel inside, and the outer side of the traction wire 6 is sheathed with a spring tube 42, which is located inside the catheter 4. Figure 13 As shown, four spring tubes 42 are inserted into the catheter 4, two of which are inserted with traction wires 6, and the other two are inserted with control wires. The distal ends 20 of the traction wires 6 and the control wires extend from the distal ends 20 of the spring tubes 42 and connect to the corresponding first fixing members 511 or the control assembly 2. The distal ends 20 of the spring tubes 42 can be connected to the second fixing members 512 of the proximal end 10 of the coiled tube 51 or the inner sidewall of the distal end 20 of the catheter 4 by welding or bonding, while the proximal end 10 of the spring tube 42 can be connected to the inner sidewall of the proximal end 10 of the catheter 4 or the distal end 20 of the handle 1 by bonding or welding.

[0065] like Figures 14-15As shown, in another embodiment, the steerable assembly 5 includes a first inner tube 54, a braided mesh 52 sleeved on the first inner tube 54, and a first outer tube 55 sleeved outside the braided mesh 52. The catheter 4 may also include a second inner tube 43 and a second outer tube 44.

[0066] In one implementation, the first inner tube 54 and the second inner tube 43 can be two independent structures. The proximal end 10 of the first inner tube 54 can be connected to the distal end 20 of the second inner tube 43 by means of bonding, hot melting, etc.; the first outer tube 55 and the second outer tube 44 can also be two independent structures. The proximal end 10 of the first outer tube 55 can also be connected to the distal end 20 of the second outer tube 44 by means of bonding, welding, etc. In another implementation, the first inner tube 54 and the second inner tube 43 can also be an integrally formed tubular structure, and the first outer tube 55 and the second outer tube 44 can also be an integrally formed tubular structure. Only the first inner tube 54 and the first outer tube 55 are located at the steerable assembly 5 and form the steerable assembly 5 with the braided mesh 52; the second inner tube 43 and the second outer tube 44 form the catheter 4 structure. As Figure 14 shown, the left side of the dashed line corresponds to the steerable assembly 5, and the right side is the catheter 4. For the convenience of display, a part of the first outer tube 55 of the steerable assembly 5 on the left side is omitted to show the structure of the braided mesh 52; a part of the second outer tube 44 of the catheter 4 on the right side is omitted to facilitate the display of the second outer tube 44.

[0067] The hardness of the first inner tube 54 is less than that of the second inner tube 43, and the hardness of the second outer tube 44 is also less than that of the second inner tube 43. For example, the first inner tube 54 and the first outer tube 55 can be made of soft materials such as Pebax and TPU, and the second inner tube 43 and the second outer tube 44 can be made of hard materials such as nylon, PI, and PTFE, so as to form a hardness difference, so that the first inner tube 54 can be bent under the action of the guide wire 6. The proximal ends 10 of the first inner tube 54 and the first outer tube 55 can be connected to the operating assembly 7 through a cylindrical distal end 20 connector, or can also be directly connected to the operating assembly 7 by means of bonding or hot melt welding, etc. This embodiment does not limit this.

[0068] Since the hardness of the first inner tube 54 and the first outer tube 55 is less than that of the first outer tube 55 and the second outer tube 44, therefore, in this embodiment, a braided mesh 52 is provided between the first inner tube 54 and the first outer tube 55 to increase the strength of the steerable assembly 5, so that the adjustment assembly 3 can drive it to bend through the guide wire 6 and increase its service life.

[0069] The control wire and the guiding wire 6 can be arranged inside the first inner tube 54 and the second inner tube 43. The distal end 20 of the guiding wire 6 is connected to the inner side wall of the distal end 20 of the first inner tube 54 by means of heat fusion or welding, etc., and the control wire is connected to the operating component 7. Specifically, the second inner tube 43 can adopt the above-mentioned multi-cavity tube, and a wire threading tube 41 for threading the guiding wire 6 and the control wire is arranged inside it. Of course, the above-mentioned spring tube 42 can also be sleeved outside the guiding wire 6 and the control wire to prevent the guiding wire 6 and the control wire from interfering with each other inside the first inner tube 54.

[0070] The guiding wire 6 can also be arranged between the first inner tube 54 and the braided mesh 52 and between the second inner tube 43 and the second outer tube 44, and the control wire is arranged inside the first inner tube 54 and the second inner tube 43. Third receiving grooves for passing and accommodating the guiding wire 6 can be arranged on the outer side walls of the first inner tube 54 and the second inner tube 43, so as to prevent the guiding wire 6 from having an undesired circumferential displacement between the first inner tube 54 and the braided mesh 52 and between the second inner tube 43 and the second outer tube 44. When the guiding wire 6 can also be arranged between the first inner tube 54 and the braided mesh 52 and between the second inner tube 43 and the second outer tube 44, the guiding wire 6 is axially staggered from the intersection points 521 of the braided wires forming the braided mesh 52, so as to ensure the smoothness of the guiding wire 6. When there are multiple control wires, the second inner tube 43 can adopt the above-mentioned multi-cavity tube, and a wire threading tube 41 for threading the control wires is arranged inside it. Of course, the above-mentioned spring tube 42 can also be sleeved outside the control wires to prevent the control wires from interfering with each other inside the first inner tube 54.

[0071] During the ESD operation, limited by the fact that there is only one instrument channel 81 on the endoscope, when the operator performs corresponding surgical operations on the patient, the operator also needs to replace the surgical instruments arranged in the endoscope instrument channel 81 multiple times to complete the operation, which undoubtedly reduces the surgical efficiency and increases the operation difficulty of the surgery.

[0072] Therefore, in order to improve the surgical efficiency and reduce the operation difficulty of the surgery, the present invention also provides an endoscope, including a receiving member 8 and an endoscope 9. As Figure 16 shown, the receiving member 8 can be a housing for receiving the corresponding components at the distal end 20 of the endoscope 9, such as a housing for receiving the lens of the endoscope 9. Two through holes are arranged on the receiving cavity 8, corresponding to the instrument channels 81. The instrument channels 81 can insert the above-mentioned surgical instruments, so that when performing surgical operations, two surgical instruments and the endoscope 9 can enter the human body through the same stoma or natural opening of the human body.

[0073] In another implementation, as Figure 17As shown, the accommodating member 8 may include a housing 82 for accommodating the corresponding components of the distal end 30 of the endoscope 9. A through hole is provided at the front end of the housing 82, corresponding to one of the instrument channels. It further includes a fixing housing 83 with a kidney-shaped cross-section perpendicular to the axis of the endoscope. Two through holes are provided on the fixing housing 83. One through hole is for the housing to pass through, so that the distal end of the endoscope and the instrument channel on the housing 82 are exposed at the distal end 20, and the other through hole corresponds to another instrument channel. The fixing housing 83 and the housing 82 can be detachably connected by means of snap fit or interference fit. In this way, during use, when only one surgical instrument is needed during the operation, the fixing housing can be detached from the housing to reduce the volume of the distal end 20 of the endoscope. When two surgical instruments are needed, the fixing housing is fixed to the housing again, which is convenient for the user to use.

[0074] In addition, two instrument channels 81 are provided on the endoscope. Since the distal end 20 of the instrument has a certain volume, the design of the double instrument channels 81 will occupy more space at the distal end 20 of the endoscope, resulting in the distal end 20 of the instrument blocking the view of the endoscope and interfering with the surgeon's observation and judgment of the surgical area, thus affecting the surgical accuracy. In this regard, as Figure 18 shown, when viewed in a cross-section perpendicular to the axis of the accommodating member 8, the endoscope 9 of this embodiment is located at the center of the accommodating member 8, and the endoscope 9 and the two instrument channels 81 are arranged in a triangular shape in this cross-section. The included angle between the straight line d connecting the center of one instrument channel 81 and the center of the endoscope 9 and the straight line e connecting the center of the other instrument channel 81 and the center of the endoscope 9 is 150°. If the cross-section is regarded as a dial, one instrument channel 81 is located at 12 o'clock, and the other instrument channel 81 is located at 5 o'clock or 7 o'clock, so as to minimize the problem of blocking the view of the endoscope 9 caused by the additional surgical instrument.

[0075] In addition, in the present invention, the mentioned adjustment assembly controls the adjustable bending assembly to adjust in two directions through two traction wires, that is, corresponding to Figure 7 the up and down adjustment. Optionally, the surgical instrument may further include four traction wires, two adjustable bending assemblies and two adjustment assemblies. Each adjustment assembly corresponds to two traction wires and one adjustable bending assembly, so that the distal end of the surgical instrument can be adjusted in four directions, for example, corresponding to Figure 7 the up and down, front and back directions for adjustment. The present invention does not limit this.

[0076] In summary, the present invention effectively overcomes various shortcomings in the prior art and has high industrial utilization value.

[0077] The above embodiments are only illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. An endoscopic surgical instrument, characterized in that, Comprising: A handle, an adjustment assembly, a catheter, an adjustable bending assembly, and two guiding wires; The adjustable bending assembly is connected to the handle through the catheter; the adjustment assembly is rotatably arranged on the handle; the guiding wires are arranged inside the catheter, with their proximal ends located inside the inner cavity of the handle and connected to the adjustment assembly, and their distal ends connected to the adjustable bending assembly; The adjustment assembly includes an adjustment knob and two guiding wire connectors; the guiding wire connectors are slidably connected to the handle in the axial direction of the handle, and each guiding wire connector is connected to one guiding wire; the adjustment knob is rotatably connected to the handle; External threads are respectively arranged on the outer side walls of the two guiding wire connectors, and the helix directions of the external threads of the two guiding wire connectors are opposite; internal threads with opposite helix directions are arranged on the inner side wall of the adjustment knob, and the adjustment knob is connected to the external thread of one guiding wire through the first thread and connected to the external thread of the other guiding wire through the second thread; the first thread and the second thread are staggered on the inner side wall of the adjustment knob.

2. The endoscopic surgical instrument according to claim 1, characterized in that: The adjustment assembly further includes a catheter connector, at least part of which is arranged inside the inner cavity of the handle. The catheter connector includes a first guiding hole penetrating the axial direction of the catheter connector for the guiding wire to pass through, and two avoidance ports that are opposite and spaced apart on the side wall of the catheter connector and communicate with the first guiding hole. The avoidance ports are arranged corresponding to the guiding wires one by one; the proximal ends of the two guiding wires respectively pass through the correspondingly arranged avoidance ports and are connected to the corresponding guiding wire connectors.

3. An endoscopic surgical instrument according to claim 2, wherein: The handle includes two first chutes that are opposite and spaced apart on the side wall of the handle and communicate with the inner cavity. The avoidance ports, the first chutes, and the guiding wires are arranged corresponding to each other one by one; A protruding member for passing through the first chute is arranged on each guiding wire connector, and the guiding wire is connected to the protruding member.

4. An endoscopic surgical instrument according to claim 1, characterized in that: The adjustable bending assembly includes a snake tube, which includes a first fixing member, a second fixing member, and a plurality of rotating joints arranged between the first fixing member and the second fixing member. The distal end of the first fixing member is connected to the operation assembly, the proximal end is hinged to the adjacent rotating joint, the distal end of the second fixing member is hinged to the adjacent rotating joint, and the proximal end is connected to the catheter; the guiding wire is arranged inside the first fixing member, the plurality of rotating joints, and the second fixing member, and its distal end is connected to the first fixing member; The rotating joint includes a connecting ring, a first hinge groove at least partially protruding from the distal end of the connecting ring, and a first hinge member at least partially protruding from the proximal end of the connecting ring and adapted to the first hinge groove. The included angle β formed by the inner side wall of the first hinge groove and the straight line a perpendicular to the center line of the connecting ring is greater than or equal to 0° and less than 90°.

5. An endoscopic surgical instrument according to claim 4, characterized in that: The included angle β formed by the inner side wall of the first hinge groove and the straight line a perpendicular to the center line of the connecting ring is 10 - 80°; 6. An endoscopic surgical instrument according to claim 4, characterized in that: The adjustable bending assembly further includes a braided mesh sleeved outside the snake tube; Alternatively, the bendable component further includes a rubber tube sleeved outside the coiled tube; Alternatively, the bendable component further includes a braided net sleeved outside the coiled tube and a rubber tube sleeved outside the braided net.

7. An endoscopic surgical instrument according to any one of claims 4-6, characterized in that: A spring tube is sleeved outside the guide wire, and the spring tube is disposed inside the catheter; The distal end of the spring tube is connected to the second fixing member or the inner side wall of the distal end of the catheter, and the proximal end of the spring tube is connected to the inner side wall of the proximal end of the catheter or connected to the handle.

8. An endoscopic surgical instrument according to claim 1, characterized in that: The bendable component includes a first inner tube, a braided net sleeved on the first inner tube, and a first outer tube sleeved outside the braided net; The distal end of the first inner tube is connected to the operating component, and the proximal end of the first inner tube is connected to the catheter; the guide wire is connected to the distal end of the first inner tube.

9. An endoscopic surgical instrument according to claim 8, characterized in that: The guide wire is located between the braided net and the first inner tube, and the guide wire is axially staggered from the intersection points of the braided wires forming the braided net.

10. An endoscope, characterized in that, Comprising a receiving member and an endoscope, the endoscope is disposed inside the receiving member, and the receiving member further includes two instrument channels, and at least one instrument channel is used to receive an endoscopic surgical instrument according to any one of claims 1-9; Viewed in a cross-section perpendicular to the axial direction of the receiving member, the endoscope is located at the center of the receiving member, and the endoscope and the two instrument channels are arranged in a triangle in this cross-section.

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