Torque transmission tube and surgical instrument

Abstract

A torque transmission tube, characterized in that the torque transmission tube comprises: a first pipe body (100) with a first channel (110) and a first end (101) and a second end (102) corresponding to the direction of extension along the first channel (110), wherein the first tube body (100) comprises a plurality of wires (121), each wire (121) being wound spirally from the first end (101) to the second end (102), the plurality of wires (121) being wound spirally to form at least one spiral wire bundle layer (120), the at least one spiral wire bundle layer (120) enclosing the first channel (110); a second pipe body (200) with a second channel (210) and a third end (201) and a fourth end (202) corresponding to the direction of extension along the second channel (210); wherein the third end (201) is connected to the second end (102) and the second channel (210) is connected to the first channel (110); where the smallest bending radius of the second pipe body (200) is smaller than the smallest bending radius of the first pipe body (100).

Description

Technical area

[0001] The present application belongs to the technical field of medical devices and relates in particular to a torque transmission tube and a surgical instrument. Technical background

[0002] With the continuous advancement of endoscopic technology, minimally invasive surgery is becoming increasingly accepted and preferred by physicians and patients due to its advantages of less trauma, faster recovery, less pain, and other benefits. In general minimally invasive surgery, the endoscope is used as a carrier to reach the lesion site through the light source attached to the endoscope and flexible angles. The appropriate treatment instruments are then inserted through the lumen of the endoscope to treat the wound.

[0003] In the surgical instruments used in traditional endoscopes, torque transmission is realized by the rotation of the handle, which then drives the inner core, and then transmits torque through the rotation of the inner core, but the inner core is very thin, so the torque transmission is not effective and the operation is not easy for doctors. Subject of the present application

[0004] Object of the invention: Embodiments of the present application provide a torque transmission tube intended to solve the technical problem that the current state of the art for torque transmission using an inner core is ineffective and that it is not easy for physicians to use; another object of the embodiments of the present application is to provide a surgical instrument comprising the above-mentioned torque transmission tube.

[0005] Technical solution: a torque transmission tube described in the embodiments of the present application comprises: a first tubular body comprising a first channel and a first end and a second end corresponding to the direction of extension along the first channel, the first tubular body comprising a plurality of wires, each wire being spirally wound from the first end to the second end, the plurality of wires being spirally wound to form at least one spiral wire bundle layer, the at least one spiral wire bundle layer enclosing the first channel; a second tubular body having a second channel and a third end and a fourth end corresponding to the extension direction along the second channel; wherein the third end is connected to the second end and the second channel is connected to the first channel; wherein the smallest bending radius of the second tubular body is smaller than the smallest bending radius of the first tubular body.

[0006] In some embodiments, the first tubular body comprises a spiral wire bundle layer, wherein the plurality of wires are arranged around the first channel and extend in the same direction to form a spiral wire bundle layer.

[0007] In some embodiments, the first tubular body comprises a plurality of layers of the spiral wire bundle layer, wherein the plurality of layers of the spiral wire bundle layer are cascaded along the radial direction of the first tubular body, and each layer of the spiral wire bundle layer comprises at least one wire.

[0008] In some embodiments, the wires of at least two adjacent layers of the spiral wire bundle layer have different spiral extension directions.

[0009] In some embodiments, the torque transmission tube further comprises: a connecting element arranged between the first tubular body and the second tubular body, the second end being connected to the third end by the connecting element.

[0010] In some embodiments, the wire includes a first terminal located at the first end and a second terminal located at the second end, wherein the first terminals of the plurality of wires are connected together and the second terminals of the plurality of wires are connected together.

[0011] In some embodiments, the first channel extends in the axial direction of the first tubular body; the axial tensile displacement of the first tubular body does not exceed 5 mm at an axial tensile force of 10 N; the axial compressive displacement of the first tubular body does not exceed 40 mm at an axial compressive force of 60 N.

[0012] In some embodiments, the plurality of wires comprises n wires, wherein the wire diameter d is mm, where n / d ≥ 1.

[0013] In some embodiments, the torque transmission tube also meets the following conditions: 2≤n≤16;0 <d≤2.

[0014] In some embodiments, the first tubular body has a smallest bending radius of r1, the second tubular body has a smallest bending radius of r2; where: 1 <r1 / r2≤8.

[0015] In some embodiments, the torque transmission tube also meets the following conditions: 20mm≤r1≤40mm;5mm≤r2≤20mm.

[0016] In some embodiments, the first tubular body has a length of L1, the second tubular body has a length of L2, where: 0 <L2 / L1≤1.

[0017] In some embodiments, the torque transmission tube has a length of L3, where 1550 mm ≤ L3 ≤ 3000 mm; and / or the torque transmission tube has a maximum outer diameter of R and a minimum inner diameter of r, where: R≤4.2mm and r≥0.2mm.

[0018] In some embodiments, the pitch S of the spiral wire, which is formed by the spiral extension of the wire, is 3 to 30 mm.

[0019] In some embodiments, the wire has a cross-section perpendicular to its spiral extension direction; where the cross-section is circular, or the cross-section has the shape of a polygon having four or more sides.

[0020] In some embodiments, the material of both the first and second tubular bodies is metal.

[0021] Accordingly, a surgical instrument described in embodiments of the present application is characterized in that the surgical instrument used for endoscopes comprises: a torque transmission tube as described above; an operating handle disposed at the first end; an actuating element arranged at the fourth end; wherein the operating handle is used to rotate the torque transmission tube to transmit torque to the actuating element.

[0022] In some embodiments, the actuating element comprises: a clamp holder arranged at the fourth end; a clamping portion attached to the clamp holder; a pulling portion movably disposed in the first channel and the second channel and connected between the operating handle and the clamping portion; wherein the operating handle further serves to move the pulling portion along the extension direction of the pulling portion to drive the clamping portion and to release the clamp holder and the clamping portion from the torque transmission tube and the pulling portion.

[0023] Advantageous Effect: Compared with the prior art, the torque transmission tube of the embodiments of the present application comprises: a first tube body having a first channel and a first end and a second end corresponding to the extension direction along the first channel, wherein the first tube body comprises a plurality of wires, each wire spirally wound from the first end to the second end, wherein the plurality of wires are spirally wound to form at least one layer of a spiral wire bundle layer, wherein at least one layer of the spiral wire bundle layer encloses the first channel; a second tube body having a second channel and a third end and a fourth end corresponding to the extension direction along the second channel; wherein the third end and the second end are connected and the second channel communicates with the first channel;wherein the smallest bending radius of the second tubular body is smaller than the smallest bending radius of the first tubular body. The first tubular body of the torque transmission tube includes a plurality of wires spirally wound to form at least one layer of a spiral wire bundle layer, whereby the spiral structure of the plurality of wires of the first tubular body is used to ensure the torsional strength of the first tubular body, so that the torque input from the first end can be effectively transmitted to the second end. By providing a second tubular body and connecting its second end to its third end, the torque can be effectively transmitted from the second end to the third end and transmitted via the third end to the fourth end of the second tubular body. Thus, the torque transmission tube can, on the one hand, effectively transmit the torque;In addition, the smallest bending radius of the second tube body is smaller than that of the first tube, which means that the second tube body is easier to bend and it is easier to adjust the angle in the narrow lumen of an organ, and thus the torque transmission tube has better operating flexibility, which leads to improving the operating accuracy of the endoscopic instrument and reducing operating difficulties.;

[0024] Compared to the prior art, the surgical instrument as an embodiment of the present application is used for an endoscope, the surgical instrument comprising: the torque transmission tube described above; an operating handle connected to the first end; and an actuating member connected to the fourth end; wherein the operating handle is used to drive rotation of the torque transmission tube to transmit torque to the actuating member.The surgical instrument can have all the technical features and advantageous effects of the torque transmission tube described above, in particular, the torque transmission tube described above is capable of transmitting the torque of the operating handle to the operating element more accurately, thereby realizing precise control of the operating element, reducing the operating difficulty for physicians, increasing the efficiency of the surgical procedure, and reducing the risk of the procedure. Description of the drawings

[0025] To better illustrate specific embodiments of the present application and the technical solutions in the prior art, the drawings required to describe the specific embodiments and the prior art are briefly presented below. Naturally, the drawings in the following description represent some of the embodiments of the present application, and based on these drawings, a person skilled in the art can obtain further drawings without any creative effort. Fig. 1 shows a schematic representation of the structure of a torque transmission tube according to an embodiment of the present application; Fig. 2 shows a schematic representation of the dimensions of a torque transmission tube according to an embodiment of the present application; Fig. 3 shows a schematic sectional view of the structure of a torque transmission tube along the line AA of Fig. 1 according to the first embodiment of the present application; Fig. 4 shows a schematic sectional view of the structure of a torque transmission tube along the line AA of Fig. 1 according to the second embodiment of the present application; Fig. 5 shows a schematic representation of the structure of a torque transmission tube according to the third embodiment of the present application; Fig. 6 shows a schematic representation of the structure of the first tubular body in a torque transmission tube according to the third embodiment of the present application; Fig. 7 shows a schematic representation of the structure of a first tube body and a connecting element in a torque transmission tube according to the third embodiment of the present application; Fig. 8 shows a schematic sectional view of the structure of the connecting element according to the third embodiment of the present application; Fig. 9 shows a schematic representation of the structure of a surgical instrument according to an embodiment of the present application; Fig. 10 shows a schematic enlarged partial view of the structure of area A of Fig. 9; Fig. 11 shows a schematic diagram for detecting the displacement of the axial pressure of a torque transmission tube according to an embodiment of the present application;

[0026] Reference numerals: 10-torque transmission tube; 100-first tube body; 101-first end; 102-second end; 110-first channel; 120-wire bundle layer; 121-wire; 1211-first terminal; 1212-second terminal; 122-cross section; 200-second tube body; 201-third end; 202-fourth end; 210-second channel; 300-connecting member; 310-connecting body; 311-first mounting portion; 312-second mounting portion; 320-third channel; 20-operating handle; 30-operating member; 31-clamp holder; 32-clamping portion; 33-pulling portion. Detailed description of implementation examples

[0027] The following provides a clear and complete description of the technical solutions of the present application in conjunction with the accompanying drawings. Obviously, the described embodiments represent only a portion of the embodiments of the present application, and not all of them. Starting from the embodiments of the present application, all other embodiments that a person skilled in the art can produce without creative effort fall within the scope of the present application.

[0028] In the description of the present application, it should be noted that terms such as "proximal end" and "distal end" refer to the person performing the operation (the surgeon), where "proximal end" is the end of the surgical instrument that is closer to the surgeon, and "distal end" is the end that is further from the surgeon than "proximal end", i.e., closer to the patient. The term "proximal end" refers to the end of the surgical instrument that is closer to the operating room, and the term "distal end" refers to the end that is further from the surgeon than "proximal end", i.e., the end that is closer to the patient. The terms used with terms such as "inside", "outside", "top", "bottom", etc.The orientation or positional relationships indicated refer to the orientation or positional relationships shown in the figures. These directional indications merely serve to facilitate and simplify the description of the present application. They do not, however, indicate or imply that this device or element must have a particular orientation or be constructed and operated in a particular orientation and are therefore not to be understood as a limitation of the present application. In the description of the present application, "several" means two or more than two; at least one indicates that it can be one, two, or more than two, unless expressly and specifically limited otherwise. "Connection" can be a direct connection, i.e., an object is directly connected to another object by contact, or an indirect connection, i.e.an object is connected to another object through other objects.

[0029] With the development of modern medicine, endoscopes, as highly flexible surgical instruments, have become very popular in various surgical operations. General endoscopes are divided into gastroscopes, enteroscopes, etc. according to different uses. According to the location and distance of the lesion, the endoscopes are produced in different lengths to adapt to the corresponding location of the lesion. In practice, the endoscope is first inserted into the human body through the mouth or anus to enter the human body. Then, by adjusting the position and angle of the front end of the endoscope under visual control, the light source carried by the endoscope itself continuously advances it to the distal end to reach the wound site. For example, for general hemostatic wounds, it is necessary to use a product such as a hemostatic clamp or hemostatic forceps, etc.through the channel of an endoscope into the wound position, and then adjust the rotation angle of the instrument to an appropriate position by rotating the instrument to staunch the blood flow of the wound tissue. The applicant notes that conventional hemostatic closure instruments used for endoscopy achieve wound tissue closure and hemostasis by rotating the handle, which drives the inner core, and the inner core in turn drives the front clamping portion. Since the size of the inner core of the instrument itself is very small, with a diameter generally not exceeding 0.6 mm, the torque transmission effect is relatively poor. Especially as the length of the instrument itself increases, the loss in torque transmission becomes increasingly serious.In addition, some endoscopic surgical instruments have multiple cores inside, so that torque transmission through the rotation of the cores is no longer possible.

[0030] In view of the above, embodiments of the present application provide a torque transmission tube 10 and a surgical instrument for overcoming at least one of the above-mentioned technical problems.

[0031] Referring to Fig. 1, a torque transmission tube 10 provided in this embodiment of the present application mainly comprises a first tube body 100 and a second tube body 200, wherein the first tube body 100 and the second tube body 200 are connected to each other and a first channel 110 within the first tube body 100 and a second channel 210 within the second tube body 200 are connected to each other. In Fig. 1, both the first channel 110 and the second channel 210 are shown by dashed lines since they are located inside.

[0032] Specifically, the first tubular body 100 surrounds and forms the first channel 110. The first channel 110 extends generally along the direction from the proximal end of the surgical instrument to the distal end and can be used to penetrate the inner core of the surgical instrument. It should be understood that in practice, the extension direction of the first channel 110 is not fixed in a particular orientation, but can extend in a straight or curved path with variable shapes depending on the use state of the first tubular body 100. Along the extension direction of the first channel 110, the corresponding ends of the first tubular body 100 are the first end 101 and the second end 102.

[0033] Referring to the combination of Fig. 1 to 4, the first tubular body 100 comprises a plurality of wires 121, each wire 121 being spirally wound from the first end 101 to the second end 102, the plurality of wires 121 being spirally wound to form at least one layer of the spiral wire bundle layer 120, the spiral wire bundle layer 120 enclosing a first channel 110. That is, the first channel 110 is a channel formed inside the spiral wire bundle layer 120.

[0034] The second tubular body 200 is shaped to form a second channel 210, which is connected to the first channel 110, both of which are intended to penetrate the inner core of the surgical instrument. The second channel 210 also extends along the proximal end toward the distal end, and the extension direction also represents a straight or curved path with variable shapes depending on the changing usage state of the second channel 210. Along the extension direction of the second channel 210, the corresponding ends of the second tubular body 200 are a third end 201 and a fourth end 202, the third end 201 being connected to the second end 102, and the fourth end 202 being used to connect to the surgical execution component located at the distalmost end of the surgical instrument.Wherein the smallest bending radius of the second tubular body 200 is smaller than the smallest bending radius of the first tubular body 100.

[0035] It is understood that the first tubular body 100 of the torque transmission tube 10 comprises a plurality of wires 121, wherein the plurality of wires 121 extend spirally and are wound to form at least one layer of the spiral wire bundle layer 120. The spiral structure of the plurality of wires 121 ensures the torsional strength of the first tubular body 100 so that the torque input from the first end 101 can be effectively transmitted to the second end 102. By providing the second tubular body 200 and connecting its second end 102 to its third end 201, the torque can be effectively transmitted from the second end 102 to the third end 201 and through the third end 201 to the fourth end 202 of the second tubular body 200. The torque transmission tube 10 is thus capable of effectively transmitting torque.Furthermore, the smallest bending radius of the second tube body 200 is smaller than the smallest bending radius of the first tube body 100, that is, the second tube body 200 is easier to bend, and it is easier to adjust the angle in the narrow lumen, thus, on the other hand, the torque transmission tube 10 has better operation flexibility, which leads to improving the operation accuracy of the endoscopic instrument and reducing the operation difficulty.The torque transmission tube 10 can be used for surgical instruments used for endoscopes, wherein the first channel 110 and the second channel 210 of the torque transmission tube 10 can be used to penetrate into the inner core of the surgical instrument, wherein the torque transmission is carried out through the torque transmission tube 10, thereby solving the phenomenon of inefficient torque transmission in the prior art surgical instruments wherein the torque transmission is carried out through the inner core.

[0036] Referring to Fig. 3, the first tubular body 100 in the first embodiment comprises a spiral wire bundle layer 120 composed of a plurality of wires 121, wherein the plurality of wires 121 are arranged around the first channel 110 and extend spirally from the first end 101 in the same direction to the second end 102. It is understood that the structure of the spiral wire bundle layer 120 is formed by winding the plurality of wires 121 in the same direction.

[0037] Referring to Fig. 4, the first tubular body 100 in the second embodiment comprises a plurality of spiral wire bundle layers 120, wherein the plurality of spiral wire bundle layers 120 are arranged in a cascade along a radial direction of the first tubular body 100, wherein each spiral wire bundle layer 120 comprises at least one wire 121. Of two adjacent spiral wire bundle layers 120, one spiral wire bundle layer 120 is surrounded at the outer periphery of another spiral wire bundle layer 120, so that the torsional strength of the first tubular body 100 is further enhanced, thereby enabling better torque transmission.

[0038] It should be noted that when the first tube body 100 comprises multiple layers of spiral wire bundle layers 120, each layer of the spiral wire bundle layers 120 may have the same or different number of wires 121. For example, each layer of the spiral wire bundle layers 120 may be formed by spirally winding one wire 121 or by spirally winding multiple wires 121; alternatively, certain layers may be formed by spirally winding one wire 121, and other layers may be formed by spirally winding multiple wires 121, which can be adjusted in detail according to actual needs.

[0039] Furthermore, in the second embodiment, the wires 121 of at least two adjacent layers of the spiral wire bundle layers 120 have different spiral extension directions. For example, the wires 121 of one of the two adjacent layers of the spiral wire bundle layers 120 extend spirally clockwise, as viewed along the extension direction of the first channel 110, and the wires 121 of the other layer extend spirally counterclockwise. This allows the torsional strength of the first tubular body 100 to be increased in both the clockwise and counterclockwise directions, thereby improving the torque transmission effect.

[0040] Referring to the combination of Fig. 5, Fig. 6 and Fig. 7, the third embodiment has substantially the same structure as the first embodiment, except that in the third embodiment, the torque transmission tube 10 further comprises a connecting member 300, wherein the connecting member 300 is used to connect the first tubular body 100 and the second tubular body 200 to facilitate assembly of the torque transmission tube 10. The connecting member 300 is disposed between the first tubular body 100 and the second tubular body 200, and the second end 102 is connected to the third end 201 via the connecting member 300, thereby connecting the first tubular body 100 and the second tubular body 200 to each other.

[0041] Specifically, the connecting element 300 comprises a connecting body 310 and a third channel 320 extending through the connecting body 310, wherein the connecting body 310 has, along the extension direction of the third channel 320, a first mounting portion 311 and a second mounting portion 312 at each end of the connecting body 310. The second end 102 of the first tubular body 100 is connected to the first mounting portion 311, and the third end 201 of the second tubular body 200 is connected to the second mounting portion 312, thereby establishing the connection between the first tubular body 100 and the second tubular body 200. The first tubular body 100 is connected to the first mounting portion 311, and the second tubular body 200 is connected to the second mounting portion 312.At the same time, the third channel 320 is connected between the first channel 110 and the second channel 210, thereby establishing the connection between the first channel 110 and the second channel 210.

[0042] Among other things, the first mounting section 311 and the second mounting section 312 may have different embodiments. For example, the first mounting section 311 may be as shown in Fig. 8, a recess may be formed at one end of the connecting body 310, and the bottom of the recess is connected to the third channel 320, so that the connection between the first mounting portion 311 and the second end 102 is realized by embedding and inserting the second end 102 of the first tubular body 100 into the recess, and at the same time, the side walls of the recess may also exert a bundling action on the first tubular body 100 to prevent the wires 121 from coming off.For example, the second mounting portion 312 may be a plug-in structure formed at the other end of the connecting body 310, with the third channel 320 extending through the plug-in structure. By inserting the plug-in structure from the third end 201 of the second tubular body 200 into the second channel 210, the connection between the second mounting portion 312 and the second tubular body 200 can be established, thus facilitating the installation and fixation of both parts. Furthermore, for example, the first mounting portion 311 and the second mounting portion 312 may be mounting grooves formed on the two end surfaces of the connecting body 310, respectively, and the mounting connection is established by embedding the first tubular body 100 and the second tubular body 200 in the mounting grooves.

[0043] It should be noted that the first tubular body 100 and the second tubular body 200 can be directly connected to each other, e.g., by welding the second end 102 and the third end 201 into a single unit, the specific structure of which will not be described further.

[0044] In some embodiments, the wires 121 include a first terminal 1211 located at the first end 101 and a second terminal 1212 located at the second end 102, wherein the first terminals 1211 of the plurality of wires 121 are connected to each other and the second terminals 1212 of the plurality of wires 121 are connected to each other. This can prevent the wires 121 from becoming loose during the rotation of the first tubular body 100, thereby ensuring the integrity of the components and also improving the torque transmission efficiency.

[0045] In some embodiments, the extension direction of the first channel 110 is defined as the axial direction of the first tubular body 100; the axial tensile displacement of the first tubular body 100 does not exceed 5 mm under an axial tensile force of 10 N; and the axial compressive displacement of the first tubular body 100 does not exceed 40 mm under an axial compressive force of 60 N. That is, the axial deformation of the first tubular body 100 pulled with the tensile force of 10 N does not exceed 5 mm; the axial deformation of the first tubular body 100 compressed with the compressive force of 60 N does not exceed 40 mm. Both the axial tensile force and the axial compressive force are applied using a tensioning machine device.

[0046] Referring to Fig. 11 for the pressure displacement test procedure: 1) Attaching one end of a rope to the cable head attachment block 70 and slipping a plastic tube over the rope; 2) Setting the lower fixing sleeve 60 and the upper fixing sleeve 50 to each end of the first pipe body 100; 3) Passing one end (a free end) of the rope through the lower fastening sleeve 60 and along the inner channel of the first tubular body 100 through the upper fastening sleeve 50, leaving a final section outside (this will be used subsequently on the clamp of the tensioning machine, ie position A); 4) Attaching the upper fastening sleeve 50 to the lower clamp of the tensioning machine and attaching the portion of the rope left in step 3) to the upper clamp of the tensioning machine, ensuring that the rope is in a taut state; 5) Start the tensioning machine, set the speed of the tensioning machine to 50mm / min, stop the tensioning machine when the tensile force reaches 60N, read the position displacement of the tensioning machine at this time as the pressure displacement of the first pipe body 100;

[0047] The tensile displacement is measured by taking the axial dimension of the first tube body 100 (ie the length L1 in Fig. 2) is measured before and after the force is applied, and the amount of dimensional change is the displacement. Tensile displacement testing procedure: 1) Adjust the initial distance between the upper and lower clamp of the clamping machine to 500±10mm; 2) Fixing both ends of the first pipe body 100 with a length of L1 to the upper and lower clamps of the clamping machine and at the same time ensuring the first pipe body 100 in a clamped state; 3) Set the speed of the clamping machine to 50mm / min, start the clamping machine, stop the clamping machine when the force reaches 10N, read the position displacement of the clamping machine at this time as the tensile displacement of the first pipe body 100.

[0048] In this embodiment, the first tube body 100 of the torque transmission tube 10 satisfies the mechanical properties described above, which makes it more effective in transmitting torque and also more flexible in using the endoscope.

[0049] In some embodiments, the number of wires 121 in the first tubular body 100 is n wires, and the diameter of the wires 121 is d mm, so that n / d≥1. For example, n / d can be one of the values ​​1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 20, 30, 40, 50, 100, or a range value between any two of these values. When n / d is set within this range, the wall of the first tubular body 100 does not become too thick, so that on the one hand, the diameter of the tubular body of the torque transmission tube 10 meets the requirements of the surgical instrument without being too large, and friction on the inner wall of the organ is reduced; on the other hand, the diameter of the first channel 110 can also be effectively secured, thus ensuring the mounting space of the inner core so that the inner core can move freely.If n / d is less than 1, the number of wires 121 is relatively small and the wire diameter is relatively large, which may result in the space in the first channel 110 being occupied and the torque transmission tube 10 becoming too thick. Furthermore, it is not conducive to the winding combination between the wires 121, which may result in large gaps between adjacent wires 121. If n / d is greater than 100, the number of wires is relatively large and the diameter of the wires is relatively small, so it will be necessary to wind multiple layers of the spiral wire bundle layer 120, which is not conducive to processing and manufacturing. Preferably, 2≤n≤16.0 <d≤2.

[0050] In some embodiments, the smallest bending radius of the first tubular body 100 is r1, and the smallest bending radius of the second tubular body 200 is r2; so that: 1 <r1 / r2≤8. r1 / r2 kann beispielsweise einer der Werte 1,5, 2, 3, 4, 5, 6, 7, 8 oder ein Bereichswert zwischen beliebigen zwei dieser Werte sein, wobei wenn r1 / r2 in einem solchen Bereich eingestellt ist, das Drehmoment des ersten Rohrkörpers 100 über den zweiten Rohrkörper 200 problemlos auf das distale Ende übertragen werden kann, ferner kann sichergestellt werden, dass der Winkel des distalen Endes in engem Lumen leichter eingestellt werden kann, wodurch die Flexibilität des Betriebs gewährleistet wird. Vorzugsweise beträgt 20mm≤r1≤40mm; 5mm≤r2≤20mm, wobei der kleinste Biegeradius des ersten Rohrkörpers 100 r1 und der kleinste Biegeradius des zweiten Rohrkörpers 200 r2 nach dem in YY0762-2009 beschriebenen Prüfverfahren des Glasfaserkabels für medizinische endoskopische Beleuchtung getestet werden.

[0051] Referring to Fig. 2, in some embodiments, the length of the first tubular body 100 is L1 and the length of the second tubular body 200 is L2, where: 0 <L2 / L1≤1. Beispielsweise kann L2 / L1 einen beliebigen Wert aus 0,1, 0,2, 0,3, 0,4, 0,5, 0,6, 0,7, 0,8, 0,9, 1 oder ein Bereichswert zwischen beliebigen zwei dieser Werte sein. Je größer L2 / L1 innerhalb dieses Bereichs ist, desto flexibler ist das distale Ende des Drehmomentübertragungsrohrs 10 und desto leichter lässt es sich bedienen und biegen, um sich an die Bedienung des Arztes während des chirurgischen Eingriffs anzupassen, dementsprechend wird die Wirkung der Drehmomentübertragung relativ abgeschwächt, wobei, wenn L2 / L1 innerhalb des oben genannten Bereichs eingehalten wird, eine bessere Wirkung der Drehmomentübertragung garantiert werden kann, um eine noch genauere Drehmomentübertragung während der Bedienung des Arztes zu ermöglichen.The smaller L2 / L1, the greater the torque transmission efficiency of the torque transmission tube 10, the better the torque transmission effect, and the correspondingly, the flexibility of the distal end is reduced. Preferably, 0.3≤L2 / L1≤0.9.

[0052] In some embodiments, the length of the torque transmission tube 10 is L3, where 1550mm≤L3≤3000mm, e.g., L3 may be 1550mm, 1650mm, 2350mm, 2700mm, 3000mm, or a range value between any two of these values ​​to ensure sufficient length for the usage scenarios of different types of endoscopes.

[0053] In some embodiments, the torque transmission tube 10 has a maximum outer diameter of R and a minimum inner diameter of r, where r≤4.2mm and r≥0.2mm, so that the torque transmission tube 10 does not become excessively thick, which ensures the adaptability to the lumen while ensuring the assembly and movement of the inner core and ensuring the application of this torque transmission tube 10 to various types of endoscopes.

[0054] In some embodiments, the pitch S of the spiral formed by the helical extension of the wire 121 is 3 to 30 mm. For example, the pitch S can be 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 19 mm, 20 mm, 24 mm, 26 mm, 27 mm, 28 mm, 29 mm, 30 mm, or a range between any two of these values. By adjusting the pitch P within this range, the resulting torque transmission tube 10 can achieve better torque transmission.

[0055] Referring again to Fig. 4, in some embodiments, the wire 121 has a cross-section 122 perpendicular to its spiral extension direction; the cross-section 122 is circular; alternatively, the cross-section 122 has the shape of a polygon, and the number of sides of the polygon is four or more. By setting the cross-section 122 of the wire 121 in the above-mentioned shape, it is possible to place the adjacent wires 121 more closely together after winding to ensure the effectiveness of the torque transmission tube 10.

[0056] Specifically, in some embodiments, the materials of both the first tubular body 100 and the second tubular body 200 are metal. In addition to ensuring overall torsional strength, the appropriate metal material also makes it possible to increase the service life and prevent rejection of human organs.

[0057] Referring to Fig. 9, embodiments of the present application also provide a surgical instrument for use with an endoscope, the surgical instrument comprising the torque transmission tube 10 according to any of the above embodiments, the operating handle 20, and the actuating member 30, the operating handle 20 being connected to the first end 101 for operation by a physician and the actuating member 30 being connected to the fourth end 202 for respective movements of the operating handle 20 to advance the surgical process; the operating handle 20 being used to drive the torque transmission tube 10 to rotate to transmit torque to the actuating member 30.By providing the above-described torque transmission tube 10 in the endoscope, it is possible to more accurately transmit the torque of the operating handle 20 to the operating member 30, which can ensure precise control of the operating member 30, reduce the difficulty of operation by the physician, improve the efficiency of the surgical operation, and reduce the risk of the operation.

[0058] With particular reference to Fig.10, the actuating element 30, in some embodiments, comprises a clamping holder 31, a clamping section 32, and a pulling section 33. The clamping holder 31 is arranged at the fourth end 202, the clamping section 32 is movably connected to the clamping holder 31, the pulling section 33 is movably arranged in the first channel 110 and second channel 210 and connected between the operating handle 20 and the clamping section 32; wherein the operating handle 20 further serves to move the pulling section 33 along the extension direction of the pulling section 33 in order to drive the clamping section 32 via the pulling section 33, and to release the clamping section 32 and the clamping holder 31 from the pulling section 33 of the torque transmission tube 10. Specifically, the torque transmission tube 10 can transmit the torque from the operating handle 20 to the clamp holder 31 and the pulling portion 33, which in turn can cause the integrated actuating element 30 to perform the physician's interventions.The clamping portion 32 may be a plurality of clamps pivotally connected to the clamp holder 31. The pulling portion 33 may include a pulling cable connected to the operating handle 20 and a pulling buckle connected between the pulling cable and the clamping portion 32. The operating handle 20 can drive the pulling portion 33 to move along the axial direction of the torque transmission tube 10, which in turn drives the clamping portion 32 to open or close the clamps. Furthermore, by operating the operating handle 20, the pulling portion 33 can be driven to move along the axial direction of the torque transmission tube 10 and to release the clamping portion 32 and the clamp holder 31 from the pulling portion 33 and the torque transmission tube 10 to remain in the patient's body to complete the surgical procedure.

[0059] In the above, the description of each embodiment has its own focus, and the parts not described in detail in one embodiment can be found in the corresponding descriptions of the other embodiments.

[0060] The torque transmission tube and the surgical instrument provided by the embodiments of the present application have been described in detail above, using specific examples to illustrate the principles and embodiments of the present application. The description of the above embodiments is only used to assist in understanding the technical solutions of the present application and its core ideas. A person skilled in the art should understand that they may still modify the technical solutions described in the above embodiments or equivalently replace some of the technical features included therein. These modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the various embodiments of the present application.

Claims

[1] A torque transmission tube, characterized by that the torque transmission tube includes: a first tubular body (100) having a first channel (110) and a first end (101) and a second end (102) corresponding to the direction of extension along the first channel (110), wherein the first tubular body (100) comprises a plurality of wires (121), each wire (121) being spirally wound from the first end (101) to the second end (102), the plurality of wires (121) being spirally wound to form at least one spiral wire bundle layer (120), the at least one spiral wire bundle layer (120) enclosing the first channel (110); a second tubular body (200) having a second channel (210) and a third end (201) and a fourth end (202) corresponding to the direction of extension along the second channel (210); wherein the third end (201) is connected to the second end (102) and the second channel (210) is connected to the first channel (110); wherein the smallest bending radius of the second tubular body (200) is smaller than the smallest bending radius of the first tubular body (100). [2] Torque transmission tube according to claim 1, characterized by in that the first tubular body (100) comprises a spiral wire bundle layer (120), wherein the plurality of wires (121) are arranged around the first channel (110) and extend in the same direction to form a spiral wire bundle layer (120). [3] Torque transmission tube according to claim 1, characterized byin that the first tubular body (100) comprises a plurality of layers of the spiral wire bundle layer (120), wherein the plurality of layers of the spiral wire bundle layer (120) are arranged in a cascade along the radial direction of the first tubular body (100), and each layer of the spiral wire bundle layer (120) comprises at least one wire (121). [4] Torque transmission tube according to claim 3, characterized by that the wires (121) of at least two adjacent layers of the spiral wire bundle layer (120) have different spiral extension directions. [5] Torque transmission tube according to claim 1, characterized by that it further includes: a connecting element (300) arranged between the first tubular body (100) and the second tubular body (200), wherein the second end (102) is connected to the third end (201) via the connecting element (300). [6] Torque transmission tube according to claim 1, characterized by in that the wire (121) comprises a first terminal (1211) located at the first end (101) and a second terminal (1212) located at the second end (102), wherein the first terminals (1211) of the plurality of wires (121) are connected to one another and the second terminals (1212) of the plurality of wires (121) are connected to one another. [7] Torque transmission tube according to claim 1, characterized by that the first channel (110) extends in the axial direction of the first tubular body (100); the axial tensile displacement of the first tubular body (100) does not exceed 5 mm at an axial tensile force of 10 N; the axial compressive displacement of the first tubular body (100) does not exceed 40 mm at an axial compressive force of 60 N. [8] Torque transmission tube according to claim 1, characterized bythat the plurality of wires (121) comprises n wires, wherein the wire diameter (121) is d mm, where: n / d ≥ 1. [9] Torque transmission tube according to claim 8, characterized by that the torque transmission tube also meets the following conditions: 2≤n≤16;0 <d≤2. [10] Torque transmission tube according to claim 1, characterized by that the first tubular body (100) has a smallest bending radius of r1, the second tubular body (200) has a smallest bending radius of r2, where: 1 <r1 / r2≤8. [11] Torque transmission tube according to claim 10, characterized by that the torque transmission tube also meets the following conditions: 20mm≤r1≤40mm;5mm≤r2≤20mm. [12] Torque transmission tube according to claim 1, characterized by that the first tubular body (100) has a length of L1, the second tubular body (200) has a length of L2, where: 0 <L2 / L1≤1. [13] Torque transmission tube according to claim 1, characterized by that the torque transmission tube (10) has a length of L3, where 1550mm≤L3≤3000mm applies; and / or that the torque transmission tube (10) has a maximum outer diameter of R and a minimum inner diameter of r, where: R≤4.2mm, r≥0.2mm applies. [14] Torque transmission tube according to claim 1, characterized by that the pitch S of the spiral wire, which is formed by the spiral extension of the wire (121), is 3 to 30 mm. [15] Torque transmission tube according to claim 1, characterized by that the wire (121) has a cross-section (122) perpendicular to its spiral extension direction; wherein the cross-section (122) is circular, or the cross-section (122) has the shape of a polygon, wherein the polygon has four or more sides. [16] Torque transmission tube according to claim 1, characterized bythat the material of both the first tubular body (100) and the second tubular body (200) is metal. [17] Surgical instrument, characterized by that it is used for endoscopes, the surgical instrument comprising: a torque transmission tube (10) according to one of claims 1 to 16; an operating handle (20) arranged at the first end (101); an actuating element (30) arranged at the fourth end (202); wherein the operating handle (20) is used to rotate the torque transmission tube (10) in order to transmit torque to the actuating element (30). [18] Surgical instrument according to claim 17, characterized by that the actuating element (30) comprises: a clamp holder (31) arranged at the fourth end (202); a clamping portion (32) fixed to the clamp holder (31); a pulling section (33) movably arranged in the first channel (110) and the second channel (210) and connected to the operating handle (20) and the clamping section (32); wherein the operating handle (20) further serves to move the pulling section (33) along the extension direction of the pulling section (33) in order to drive the clamping section (32) and to release the clamp holder (31) and the clamping section (32) from the torque transmission tube (10) and the pulling section (33).

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