Endoscopic surgical instrument and endoscope

Abstract

The invention provides an endoscopic surgical instrument and an endoscope, which are used for solving the problems that in the prior art, only coaxial operation with the endoscope can be realized, the assembly is slow, the cost is high, and fixation cannot be realized after bending adjustment. Comprising an operating handle, a snake bone assembly, a bending adjusting assembly and a locking assembly, and an inner cavity is formed in the operating handle; the snake bone assembly is connected with the far end of the operating handle through the catheter. The bending adjusting assembly comprises a fixing shaft fixedly installed in an inner cavity of the operating handle, at least one bending adjusting part and at least one bending adjusting power piece, at least part of the bending adjusting part is rotatably arranged on the fixing shaft in a sleeving mode and can move in the axial direction of the fixing shaft, and the bending adjusting part controls the snake bone assembly to generate bending deformation through the bending adjusting power piece; the locking assembly comprises at least one abutting part and a locking part, and the locking part is used for driving the at least one bending adjusting part to move in the axial direction away from the fixing shaft, so that the at least one abutting part locks rotation of the bending adjusting part. The device is fast to assemble, low in cost and capable of independently locking the snake bone assembly.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of medical devices, and particularly relates to an endoscopic surgical instrument and an endoscope. BACKGROUND

[0002] Endoscopic submucosal dissection (ESD) as a minimally invasive treatment technology, its core operation is to guide through the endoscope, using high-frequency electrotome and other special surgical instruments to peel off the lesion and the normal submucosa layer below it layer by layer, so as to realize the whole block resection of the lesion tissue. With its small trauma, less bleeding, rapid postoperative recovery and other significant advantages, it has become the preferred treatment method for early mucosal cancer and submucosal benign tumors in the digestive tract. In the process of ESD surgery, surgical instruments play a key role. Through effective tissue traction, not only can the uncut area be clearly exposed to facilitate the precise operation of the electrotome, but also can significantly improve the safety, efficiency and operation convenience of the operation.

[0003] However, at present, the surgical instruments in the process of ESD do not have the bending adjustment function, so that the doctor can only operate coaxially with the endoscope when operating the operating assembly, and cannot realize efficient tissue peeling. The bending adjustment assembly in the endoscope field has the problems of complex structure, high manufacturing cost and long assembly time, and the snake bone assembly of the bending adjustment assembly is connected by rivets with complex processing technology and high price, which greatly increases the cost of disposable consumables; in addition, in clinical use, the instrument lacks effective locking mechanism, in order to stabilize the distal snake bone assembly and the operating assembly at a specific angle, medical staff can only rely on manual holding and fixing, which not only is laborious, but also reduces the operation efficiency. SUMMARY

[0004] In view of the above-mentioned defects of the prior art, the purpose of the present application is to provide an endoscopic surgical instrument and an endoscope, which can solve the problems of coaxial operation with the endoscope, slow assembly, high cost and inability to fix after bending adjustment in the prior art.

[0005] To achieve the above-mentioned purpose and other related purposes, the present application provides an endoscopic surgical instrument, which comprises: An operating handle, an inner cavity is formed in the operating handle; A snake bone assembly, the snake bone assembly is connected with the distal end of the operating handle through a catheter; A bending assembly, comprising a fixed shaft fixedly installed in the inner cavity of the operating handle, at least one bending part and at least one bending power member, the at least one bending part being at least partially rotatably sleeved on the fixed shaft and axially movable along the fixed shaft, the at least one bending power member being located in the catheter, the proximal end of the bending power member being connected with the at least one bending part, and the distal end of the bending power member being connected with the snakebone assembly, the bending part controlling the snakebone assembly to generate bending deformation through the bending power member; A locking assembly, comprising at least one abutting part and a locking part, the number of the abutting parts being equal to that of the bending parts, the abutting parts being arranged on the bending parts, and the locking part being rotatably connected with the fixed shaft to drive the at least one bending part to move axially away from the fixed shaft, so that the at least one abutting part locks the rotation of the bending part.

[0006] Optionally, the bending part comprises a rotating column having a through hole in the direction of the central axis of the rotating column, the through hole being rotatably sleeved on the fixed shaft and being at least partially axially movable along the fixed shaft. A bending member, the bending member being connected with the snakebone assembly at the distal end through the bending power member, the bending member being coaxially fixedly connected with the rotating column.

[0007] Optionally, the abutting part comprises a first elastic member, the first elastic member being arranged in contact with the bending part, the locking part driving the bending part to move axially away from the fixed shaft, so that the first elastic member is compressed to lock the rotation of the bending part.

[0008] Optionally, the abutting part comprises a plurality of indexing teeth, the plurality of indexing teeth being arranged on the bending part at intervals, and a tooth slot being formed between adjacent indexing teeth. A second abutting ring, one end of the second abutting ring being fixedly connected in the operating handle, the other end of the second abutting ring being provided with a toothed structure matched with the tooth slot in the locked state. A second elastic member, the second elastic member being used to reset the bending part to one end of the fixed shaft.

[0009] Optionally, the locking part comprises a rotating arm, a locking slot being formed in the operating handle, the rotating arm penetrating through the locking slot to the outside of the operating handle. A locking member, the locking member being rotatably connected with the fixed shaft, the locking member being driven to drive the bending part to move axially along the fixed shaft by rotating the rotating arm, the rotation of the bending part being locked by the abutting part.

[0010] Optionally, the operation handle comprises a first handle body and a second handle body, the first handle body and the second handle body are connected through a clamping structure, the fixing shaft is installed in the inner cavity and is integrally formed with the first handle body through injection molding.

[0011] Optionally, the snake bone assembly comprises a first connecting section, the first connecting section is located at the distal end of the operation handle. A second connecting section, the proximal end of the second connecting section is connected with the catheter. A plurality of sections, the plurality of sections are arranged between the first connecting section and the second connecting section. A plurality of rotating members, the plurality of rotating members are respectively connected between the proximal end of the first connecting section and the distal end of the section adjacent to the rotating member, between the adjacent sections and between the distal end of the second connecting section and the proximal end of the section adjacent to the rotating member, the rotating member comprises two outer cantilever arms arranged oppositely and fixedly connected with one end of the section, two inner cantilever arms arranged oppositely and fixedly connected with the other end of the section, at least one rotating shaft, the rotating shaft is fixedly connected with the inner cantilever arm perpendicularly, and the outer cantilever arm has a rotating hole matched with the rotating shaft in rotation. When the rotating member is connected, the rotating shaft is matched with the rotating hole in rotation by deforming the outer cantilever arm.

[0012] Optionally, the two outer cantilever arms and the two inner cantilever arms are fixedly connected with the two ends of the section respectively and form a H-shaped structure in the same cross section, so that the bending directions of the plurality of sections are two opposite bending directions.

[0013] Optionally, the two outer cantilever arms and the two inner cantilever arms are fixedly connected with the two ends of the section respectively and are arranged in a staggered manner in the circumferential direction of the section, so that the bending directions of the plurality of sections are four directions.

[0014] An endoscope, comprising the endoscopic surgical instrument.

[0015] As described above, the endoscopic surgical instrument and the endoscope of the present application have at least the following beneficial effects: Through the design of the bending adjusting assembly, the locking assembly and the snake bone assembly, the operating assembly of the surgical instrument can be independently bent and locked relative to the endoscope, so that the tissue can be efficiently stripped, and the safety, efficiency and operation convenience of the surgery are improved. By integrating part of the structures of the bending adjusting assembly and the locking assembly in the inner cavity of the operating handle, the structure of the entire operating handle is compact, assembly is facilitated, manufacturing cost is reduced, single-handed holding and operation of the user are facilitated, ergonomic design is met, operation fatigue is reduced, and use efficiency is improved. In a fine surgery, when the doctor needs to lock the snake bone assembly at a specific angle, by applying force to the locking part, the locking part rotates to generate an axial driving force, the locking part drives at least one bending part to move axially along the fixed shaft, the abutting part on the at least one bending part is pressed against the inner cavity wall of the operating handle, any rotation and movement of the bending part is prevented, and the bending shape of the snake bone assembly is locked, so that the operation is simple and fast.

[0016] By elastically deforming the outer cantilever, for example, slightly opening, the rotating shaft on the inner cantilever can be embedded in the rotating hole of the outer cantilever, so that the rotating shaft can be quickly assembled and disassembled without complex tools, and the manufacturing and maintenance costs are reduced. After assembly is completed, the outer cantilever returns to its original state, the rotating shaft and the rotating hole form stable rotating cooperation, the outer cantilever is deformed and reset to laterally constrain the rotating shaft, the rotating shaft is prevented from falling off, the structural strength during rotation is ensured, a stable rotating center is provided, movement is accurately transmitted, and backlash is reduced. The rotating member adopts a cantilever and a rotating shaft structure, occupies small space, and is suitable for miniaturization application. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 A three-dimensional structure schematic diagram of the present application is shown; Figure 2 An operating handle three-dimensional structure schematic diagram of the present application is shown; Figure 3 An operating handle three-dimensional sectional view of the present application is shown; Figure 4 A bending adjusting piece three-dimensional structure schematic diagram of the present application is shown; Figure 5 Another embodiment operating handle sectional view of the present application is shown; Figure 6 A three-dimensional structure schematic diagram of the present application is shown; Figure 5 An A part enlarged view of the present application is shown; Figure 7 A first handle body three-dimensional structure schematic diagram of the present application is shown; Figure 8 A second handle body three-dimensional structure schematic diagram of the present application is shown; Figure 9 A snake bone assembly three-dimensional structure schematic diagram of the present application is shown; Figure 10Fig. 1 is a perspective view of a rotating member according to an embodiment of the present application; Figure 11 Fig. 2 is a perspective view of a snake bone assembly according to another embodiment of the present application; Figure 12 Fig. 3 is a perspective view of a rotating member according to another embodiment of the present application; Figure 13 Fig. 4 is a perspective view of an application example according to the present application.

[0018] Element number explanation Operating handle 1, inner cavity 11, first connecting cavity 111, second connecting cavity 112, first mounting hole 113, second mounting hole 114, first handle body 12, second handle body 13, clamping structure 14, clamping groove 141, clamping buckle 142, locking groove 15, locking half groove 151, through hole 16; Snake bone assembly 2, first connecting section 21, second connecting section 22, section 23, rotating member 24, outer cantilever 241, inner cantilever 242, rotating shaft 243, rotating hole 244, reinforcing arm 245, threading hole 25, wire hole 26; Catheter 3; Bending adjusting assembly 4, fixing shaft 41, bending adjusting part 42, rotating column 421, through hole 4211, bending adjusting handle 4212, bending adjusting member 422, annular plate 4221, fixing component 4222, annular protrusion 4223, first limiting member 4224, connecting member 4225, second limiting member 4226, bending adjusting power member 43, clamping member 431, catheter connecting member 44, third limiting member 441, fourth limiting member 442, fifth limiting member 443, traction hole 444; Locking assembly 5, abutting part 51, first elastic member 511, first abutting ring 512, index tooth 513, second abutting ring 514, tooth structure 5141, second elastic member 515, locking part 52, rotating arm 521, locking member 522; Operating assembly 6, endoscope 7. DETAILED DESCRIPTION

[0019] The above embodiments of the present application are described in detail by specific examples, and other advantages and effects of the present application can be easily understood by those skilled in the art from the contents disclosed in the present specification.

[0020] Please refer to Figures 1 to 12It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the technical content disclosed herein. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

[0021] In this invention, "proximal" and "distal" refer to the relative distance between the medical device and the operator during use. The end closer to the operator is the proximal end, and the end farther from the operator is the distal end.

[0022] The following embodiments are for illustrative purposes only. These embodiments can be combined and are not limited to the content shown in any single embodiment below.

[0023] In this embodiment, please refer to Figures 1 to 12 This invention provides an endoscopic surgical instrument, comprising: Operating handle 1, wherein an inner cavity 11 is provided on the operating handle 1; Snake bone assembly 2, which is connected to the distal end of the operating handle 1 via a conduit 3; wherein, the distal end of snake bone assembly 2 is connected to the operating component 6, and the proximal end of snake bone assembly 2 is connected to the conduit 3.

[0024] The operating component 6 can be a traction clamp for pulling tissue, an electrosurgical knife for cutting tissue, or other structures used to perform corresponding operations on tissue during surgery. There are no restrictions on this.

[0025] The bending assembly 4 includes a fixed shaft 41 fixedly installed in the inner cavity 11 of the operating handle 1, at least one bending part 42, and at least one bending power component 43. At least one bending part 42 is at least partially rotatably sleeved on the fixed shaft 41 and can move axially along the fixed shaft 41. At least one bending power component 43 is located in the guide tube 3, with its proximal end connected to at least one bending part 42 and its distal end connected to the snake bone assembly 2. The bending part 42 controls the snake bone assembly 2 to produce bending deformation through the bending power component 43. The fixed shaft 41 is provided with weight reduction holes along its own axial direction, which enables the manufacturing cost to be saved while meeting the structural strength requirements, and also makes it easier and more convenient for users to use.

[0026] The conduit 3 is a hollow cylindrical structure, inside which the bending adjustment component 4 is inserted to control the bending adjustment power component 43 of the snake-bone assembly 2. The bending adjustment power component 43 can be a wire-like structure made of metal, such as steel wire or tungsten wire, or it can be a traction cable made of polymer material. The distal end of the bending adjustment power component 43 can be connected to the distal end of the snake-bone assembly 2 or the proximal end of the operating component 6, specifically by bonding or welding. The proximal end is located in the cavity of the operating handle 1 and is connected to the bending adjustment component 4.

[0027] The locking assembly 5 includes at least one abutting part 51 and a locking part 52. The number of abutting parts 51 is equal to the number of bending parts 42. The abutting parts 51 are disposed on the bending parts 42. The locking parts 52 are rotatably connected to the fixed shaft 41 to drive at least one bending part 42 to move axially away from the fixed shaft 41, so that at least one abutting part 51 locks the bending part 42 to rotate.

[0028] The design of the bending assembly 4, locking assembly 5, and snake-bone assembly 2 allows the operating components of the surgical instrument to be independently bent and locked relative to the endoscope, enabling efficient tissue dissection and improving surgical safety, efficiency, and ease of operation. By integrating parts of the bending assembly 4 and locking assembly 5 into the inner cavity 11 of the operating handle 1, the entire operating handle 1 becomes compact, facilitating assembly, reducing manufacturing costs, and allowing for easy one-handed grip and operation. This ergonomic design reduces operator fatigue and improves efficiency. In delicate surgeries, when the surgeon needs to lock the snake-bone assembly 2 at a specific angle, applying force to the locking part 52 causes it to rotate, generating an axial driving force. The locking part 52 drives at least one bending part 42 to move axially along the fixed axis 41, pressing the abutment 51 on at least one bending part 42 against the inner cavity 11 wall of the operating handle 1, preventing any rotation or movement of the bending part 42, thus locking the bending shape of the snake-bone assembly 2. This makes operation simple and quick.

[0029] In this embodiment, please refer to Figures 1 to 4The bending adjustment part 42 includes a rotating column 421. The rotating column 421 has a through hole 4211 along its own central axis. The through hole 4211 is rotatably sleeved on the fixed shaft 41 and can at least partially move along the axial direction of the fixed shaft 41. The through hole 4211 can be convex, which can reduce the overall weight and save costs. The other end of the rotating column 421 is provided with a bending adjustment handle 4212, which extends to the outside of the operating handle 1, so that the user can rotate the bending adjustment handle 4212 to drive the bending component 422 and the rotating column 421 to rotate. At this time, the outer side wall of the other end of the rotating column 421 has multiple protruding teeth in the circumferential direction. The inner surface of the shaft hole of the bending adjustment handle 4212 has a keyway that matches the multiple protruding teeth, so that the rotation of the bending adjustment handle 4212 drives the rotation of the rotating column 421 to rotate. Other structures can be used for the connection, which are not limited here.

[0030] The bending component 422 is connected to the far-end snake bone assembly 2 via the bending power component 43, and the bending component 422 is coaxially fixedly engaged with the rotating column 421.

[0031] The bending component 422 includes an annular plate 4221 integrally formed on the outside of the rotating column 421, and at least one fixing component 4222 fixed to the side of the annular plate 4221. The fixing component 4222 is used to connect to the proximal end of the bending power component 43. The number of fixing components 4222 and bending power components 43 is equal. In this case, the proximal end of the bending power component 43 is connected to the fixing component 4222, and the distal end is connected to the snake bone assembly 2. If there is only one fixing component 4222 and one bending power component 43, the unidirectional bending deformation function of the snake bone assembly 2 can be realized.

[0032] The fixing component 4222 can be an L-shaped structure. In this case, the proximal end of the bending power component 43 can be a ring-shaped structure, which is sleeved on the fixing component 4222. The bending member 422 also includes an annular protrusion 4223, which is spaced from the rotating column 421 to accommodate the abutment portion 51. In a specific embodiment, there are two annular protrusions 4223, which are provided on two sides of the annular plate 4221.

[0033] The bending member 422 also includes a first limiting member 4224, which is disposed on the side wall of the annular protrusion 4223 and has a gap between it and the annular plate 4221 to accommodate the bending power member 43 and prevent the bending power member 43 from moving axially, thus achieving the limiting function. In a specific embodiment, there are two first limiting members 4224, which are respectively disposed on the side walls of the two annular protrusions 4223. The first limiting member 4224 can be a fan-shaped structure integrally formed on the outer side of the annular protrusion 4223, and the gap between it and the annular plate 4221 is used to accommodate the bending power member 43 to prevent the bending power member 43 from being displaced axially in the rotating column 421.

[0034] A connector 4225 is provided at the proximal end of the bending power component 43. The proximal end of the bending power component 43 near the connector 4225 forms a ring-shaped structure for fitting onto the fixing component 4222. The connector 4225 can be a fixing ring used to fix the proximal end of the bending power component 43 to the side wall of the fixing component 4222, forming a ring-shaped structure to ensure that the bending power component is securely fixed to the fixing component 4222. When the bending power component 43 is metal, the bending power component 43 and the connector 4225 can also be connected by welding or other methods to ensure that the proximal end of the bending power component 43 can form a ring.

[0035] A second limiting member 4226 is provided on the side wall of the annular plate 4221. The second limiting member 4226 is used to abut against the front end of the connecting member 4225. The second limiting member 4226 can be a limiting plate or a limiting post. It is used to limit the connecting member 4225 between the fixed member 4222 and the second limiting member 4226 to prevent relative displacement between the connecting member 4225 and the rotating column 421 when the rotating column 421 rotates.

[0036] The distance between the outer side of the second limiting member 4226 and the outer side wall of the annular protrusion 4223 is less than the diameter of the connector 4225 and greater than the diameter of the bending power member 43. Thus, through the action of the second limiting member 4226 and the fixing member 4222, the connector 4225 can be limited between the fixing member 4222 and the second limiting member 4226.

[0037] In this embodiment, please refer to Figures 1 to 3 The clamping part 51 includes a first elastic element 511, which is in contact with the bending part 42. The locking part 52 drives the bending part 42 to move axially away from the fixed axis 41, so that the first elastic element 511 is compressed to lock the rotation of the bending part 42. At this time, the first elastic element 511 is located in the gap between the annular protrusion 4223 and the rotating column 421. The first elastic element 511 is initially in a state of free extension or slight compression, which does not affect the rotation adjustment of the bending part 42.

[0038] The first elastic element 511 includes a friction plate, a sealing ring, a wave washer, or a wave spring. By selecting different first elastic elements 511, different locking strengths, space constraints, and functional requirements can be matched.

[0039] The clamping part 51 further includes a first abutting ring 512, which is disposed inside the operating handle 1 and contacts the first elastic member 511, thereby providing a uniform contact force. The first abutting ring 512 always lightly rests on the bending part 42, eliminating axial gaps and ensuring no shaking. During the locking process, rotating the locking part 52 pushes the bending part 42 to move, causing the first elastic member 511 to be further compressed. The increased force generated is evenly transmitted to the bending part 42 through the first abutting ring 512, ultimately pressing it against the operating handle 1 to achieve locking. During the releasing process, reversing the locking part 52 reduces the pressure on the first elastic member 511, causing the first elastic member 511 to spring back and reset the bending part 42 towards the fixed shaft 41.

[0040] In this embodiment, please refer to Figure 5 and Figure 6 The clamping part 51 includes a plurality of indexing teeth 513, which are spaced apart on the bending part 42, and a tooth groove is formed between adjacent indexing teeth 513. The second abutment ring 514 has one end fixedly connected to the operating handle 1, and the other end of the second abutment ring 514 is provided with a toothed structure 5141 that is adapted to the tooth groove when locked. The second elastic element 515 is used to reset the bending part 42 toward one end of the fixed shaft 41.

[0041] Multiple indexing teeth 513 are spaced apart along the circumferential sidewall of the annular plate 4221 to form an annular structure, and the second elastic member 515 is located within the interval between the annular protrusion 4223 and the rotating column 421.

[0042] During the locking process, rotating the locking part 52 pushes the bending part 42 to move, causing the second elastic element 515 to be further compressed, so that the tooth groove and the toothed structure 5141 are matched to achieve locking. During the releasing process, reversing the locking part 52 reduces the pressure on the second elastic element 515, and the second elastic element 515 rebounds, resetting the bending part 42 to one end of the fixed shaft 41. At this time, the tooth groove and the toothed structure 5141 are disconnected.

[0043] The second elastic element 515 includes a helical spring.

[0044] In this embodiment, please refer to Figure 2 , Figure 3 or Figure 5 ,Figure 6 The locking part 52 includes a rotating arm 521, and the operating handle 1 has a locking groove 15. The rotating arm 521 passes through the locking groove 15 to the outside of the operating handle 1. A locking element 522 is rotatably connected to the fixed shaft 41. Rotating the rotating arm 521 drives the locking element 522 to move the adjusting part 42 axially along the fixed shaft 41. The adjusting part 42 is locked in place by the abutment part 51. When locked, rotating the rotating arm 521 outside the operating handle 1 causes the locking element 522 to rotate on the fixed shaft 41. The outer contour of the rotating locking element 522 pushes the adjusting part 42, causing it to move axially along the fixed shaft 41. The adjusting part 42 then drives the abutment part 51, pressing it tightly against the inner end face of the operating handle 1. The user can control the clamping force by rotating the rotating arm 521, thus achieving locking and making the locking force precisely adjustable. When unlocking, the rotating arm 521 is rotated in the opposite direction, the locking part 522 rotates back, and its thrust on the adjusting part 42 disappears. The pressing part 51 pushes the adjusting part 42 to move in the opposite direction, so that the pressing part 51 is in the initial state. At this time, the adjusting part 42 can rotate freely to adjust the curvature of the adjustable bending component 4.

[0045] The locking element 522 includes a locking block. The outer wall of the fixed shaft 41 has an external thread, and the locking block has an internal thread that mates with the external thread. The locking block and the adjusting part 42 can be rotatably connected or abutted. The threaded engagement between the locking block and the fixed shaft 41 stably maintains the axial position. When the locking block is rotated by rotating the rotating arm 521, the axial movement distance of the locking block can be precisely controlled by controlling the rotation amplitude of the rotating arm 521, thereby precisely adjusting the displacement of the adjusting part 42.

[0046] The height of the locking groove 15 is greater than the thickness of the rotating arm 521. When the locking block drives the bending part 42 to move axially through the threaded transmission, the rotating arm 521 is linked with the locking block. The clearance reserved in the height of the locking groove 15 allows the rotating arm 521 to move freely in the axial direction without causing motion interference due to the height restriction of the locking groove 15.

[0047] In this embodiment, please refer to Figure 1 , Figure 2 , Figure 7 and Figure 8 The operating handle 1 includes a first handle body 12 and a second handle body 13. The first handle body 12 and the second handle body 13 are connected by a snap-fit ​​structure 14. The fixed shaft 41 is installed in the inner cavity 11 and is integrally formed with the first handle body 12 by injection molding, which improves positioning accuracy, strengthens structural stability, simplifies the assembly process, and adapts to the high requirements of medical scenarios, thereby reducing processing steps and lowering mass production costs.

[0048] The snap-fit ​​structure 14 includes a slot 141 and a buckle 142. The slot 141 and the buckle 142 are respectively disposed on the first handle body 12 and the second handle body 13, which makes the assembly efficient, fast and convenient for non-destructive disassembly and maintenance.

[0049] The locking groove 15 can be set on one of the connection points between the first handle body 12 and the second handle body 13, or a locking half groove 151 can be set at the connection point between the first handle body 12 and the second handle body 13. After the first handle body 12 and the second handle body 13 are connected by the snap-fit ​​structure 14, a locking groove 15 is formed for the rotating arm 521 to pass through. The opening of the locking groove 15 faces the rear end of the operating handle 1, which facilitates human-computer interaction and is more in line with actual application scenarios.

[0050] The operating handle 1 may also be provided with a through hole 16 for the rotating column 421 to pass through, and the through hole 16 is connected to the inner cavity 11 of the operating handle 1. The through hole 16 is provided on the second handle body 13, and the through hole 16 is collinear with the central axis of the rotating column 421.

[0051] The inner cavity 11 of the operating handle 1 can be composed of a first connecting cavity 111 and a second connecting cavity 112. The distal end of the first connecting cavity 111 is provided with a first mounting hole 113 for communicating the first connecting cavity 111 with the outside. The first connecting cavity 111 and the second connecting cavity 112 are connected through a second mounting hole 114. The second connecting cavity 112 is used to accommodate part of the structure of the bending assembly 4 and the locking assembly 5.

[0052] The bending assembly 4 also includes a conduit connector 44. The outer wall of the conduit connector 44 is provided with a third limiting member 441, a fourth limiting member 442, and a fifth limiting member 443. The third limiting member 441 is located at the distal end of the connection to the conduit 3. The third limiting member 441 can be a terminal block, with an opening on its inner side for the conduit 3 to pass through. The proximal end of the terminal block abuts against the outer side of the distal end of the operating handle 1 to prevent the conduit 3 from extending into the first connecting cavity 111 of the operating handle 1. The fourth limiting member 442 and the fifth limiting member 443 can be abutting rings and / or abutting blocks protruding from the outer wall of the conduit connector 44. The fourth limiting member 442 abuts against the front end of the operating handle 1, and the fifth limiting member 443 abuts against the distal side wall of the second connecting cavity 112. The first mounting hole 113 and the second mounting hole 114 are used for the conduit connector 44 to pass through, so that the conduit connector 44 can be fixed in the inner cavity 11 of the operating handle 1 by the action of the third limiting member, the fourth limiting member 442 and the fifth limiting member 443.

[0053] The conduit connector 44 may be a traction hole 444 that directly penetrates axially for the bending power component 43 to pass through. The conduit connector 44 may also include a traction hole 444 penetrating axially for the bending power component 43 to pass through, and at least one clearance port disposed on the side wall of the conduit connector 44 and communicating with the traction hole 444. The clearance ports correspond one-to-one with the bending power components 43. The proximal end of the bending power component 43 passes through the corresponding clearance port and connects to the fixing component 4222. The clearance port is disposed on the side wall of the conduit connector 44 located in the first connecting cavity 111. After the proximal end of the bending power component 43 extends from the clearance port, it passes through a third mounting hole equal in number to the bending power component 43 and connects to the fixing component 4222. The third mounting hole connects the first connecting cavity 111 and the second connecting cavity 112.

[0054] A first spring tube can also be fitted onto the outer wall of the bending power component 43. After the proximal end of the first spring tube passes through the clearance opening, it is secured to the third mounting hole by a snap-fit ​​component 431. The snap-fit ​​component 431 is a hollow cylindrical structure with limiting rings at both ends. The limiting ring at the proximal end of the snap-fit ​​component 431 abuts against the front side wall of the second connecting cavity 112, and the limiting ring at the front end of the snap-fit ​​component 431 abuts against the rear side wall of the first connecting cavity 111, thereby fixing the first spring tube to the third mounting hole. After the proximal end of the first spring tube is fixed to the third mounting hole, the proximal end of the bending power component 43 passes through the first spring tube and is fixedly connected to the fixing component 4222, preventing the bending power component 43 from becoming entangled or interfering in the second connecting cavity 112 and the catheter 3, thus affecting the normal use of the surgical instruments.

[0055] The bending section 42 has at least one. When the bending section 42 has one and the fixing member 4222 and the bending power member 43 have two, it enables two bending movements of the snake bone assembly 2 in opposite directions. When locking is required, the first elastic member 511 is compressed by contacting the first abutment ring 512 on the second handle to achieve locking.

[0056] When there are two bending parts 42, and two fixing parts 4222 and two bending power parts 43, the two bending parts 42 are axially arranged along the fixing shaft 41, and the abutting parts are arranged one-to-one with the bending parts 42. One abutting part is located between the two bending parts 42, and the other abutting part is located between the bending part 42 away from the locking part 52 and the second handle body 13, so that bending movement of the snake bone assembly 2 in four directions can be realized. At this time, the through hole 4211 of the rotating column 421 of the other bending part 42 is rotatably sleeved on the rotating column 421, and the end away from the locking part 52 extends out of the operating handle 1 through the through hole 16. The end away from the locking part 52 also has a wheel. When locking is required, the locking part 52 drives the rotating column 421 to move axially along the fixing shaft 41 to achieve locking.

[0057] In this embodiment, please refer to Figures 9 to 12 The snake bone assembly 2 includes a first connecting segment 21, which is located at the distal end of the operating handle 1. The second connecting segment 22 is connected to the conduit 3 at its proximal end. The first connecting segment 21, the second connecting segment 22, and the multiple segments 23 can be made of soft materials, such as plastic, silicone, TPU, PE, Pebax, etc., and are formed by injection molding to reduce processing steps and manufacturing costs. The first connecting segment 21, the second connecting segment 22, and the segments 23 can all be cylindrical structures.

[0058] Multiple segments 23 are disposed between the first connecting segment 21 and the second connecting segment 22; A plurality of rotating members 24 are provided, which respectively rotatably connect the proximal end of the first connecting segment 21 to the distal end of the adjacent segment 23, the adjacent segments 23, and the distal end of the second connecting segment 22 to the proximal end of the adjacent segment 23. Each rotating member 24 includes two oppositely arranged outer cantilever arms 241, both fixedly connected to one end of the segment 23, two oppositely arranged inner cantilever arms 242, both fixedly connected to the other end of the segment 23, and at least one rotating shaft 243. At least one rotating shaft 243 is perpendicularly fixed to the inner cantilever arm 242, and the outer cantilever arm 241 has a rotating hole 244 that rotatably engages with the rotating shaft 243. When the rotating component 24 is connected, the outer cantilever 241 is deformed to rotate the rotating shaft 243 and the rotating hole 244 into a rotating fit.

[0059] When the inner and outer rotating arms 521 are connected to the two ends of segment 23, they can be positioned at any angle between 0° and 90°, allowing the second connecting segment 22 to form a spiral structure when bent. By allowing the outer cantilever 241 to undergo elastic deformation, such as slight opening, the rotating shaft 243 on the inner cantilever 242 can be inserted into the rotating hole 244 of the outer cantilever 241, enabling quick plug-and-play assembly without complex tools, thus reducing manufacturing and maintenance costs. After assembly, the outer cantilever 241 returns to its original shape, and the rotating shaft 243 forms a stable rotational fit with the rotating hole 244. After the outer cantilever 241 deforms and resets, it provides lateral constraint on the rotating shaft 243, preventing it from falling off while ensuring structural strength during rotation, thereby providing a stable center of rotation, ensuring precise motion transmission, and reducing backlash. The rotating component 24, with its cantilever and rotating shaft 243 structure, occupies little space and is suitable for miniaturized applications.

[0060] The inner cantilever 242, the outer cantilever 241, the rotating shaft 243, and the segment 23 are injection molded, which reduces production costs, simplifies the process, and improves structural reliability and strength.

[0061] In this embodiment, please refer to Figure 9 and Figure 10 The two outer cantilever arms 241 and the two inner cantilever arms 242 are respectively fixed to both ends of the segment 23 and form an H-shaped structure within the same cross section. This optimizes stress distribution so that the bending directions of the multiple segments 23 are two opposite bending directions. When adjacent segments 23 are connected by a rotating member 24, they can bend in two opposite directions around the axis of the H-shaped structure, forming a controllable flexible deflection, thereby improving operational accuracy and ensuring balanced stress distribution.

[0062] In this embodiment, please refer to Figure 11 and Figure 12 Two outer cantilever arms 241 and two inner cantilever arms 242 are respectively fixed to both ends of the segment 23 and are staggered at intervals around the circumference of the segment 23 so that the bending directions of the multiple segments 23 are four directions. Due to the staggered arrangement of the outer cantilever arms 241 and inner cantilever arms 242, each rotating member 24 forms two mutually perpendicular axes of rotation, allowing a single segment 23 to bend in opposite directions around these two axes, thereby achieving four-way bending motion and maintaining structural compactness. When multiple segments 23 are connected in series through the same staggered outer cantilever arms 241 and inner cantilever arms 242 structure, the four bending directions of each segment 23 are superimposed, enabling flexible steering of the overall structure in three-dimensional space. This allows for more complex steering actions to be performed in narrow, multi-turn spaces, improving the environmental adaptability of the device.

[0063] The first connecting segment 21 and the second connecting segment 22 have circumferential limiting rings.

[0064] It also includes a woven mesh, which is sleeved on the outside of the first connecting segment 21, the second connecting segment 22 and the plurality of segments 23, and is located between the limiting rings of the first connecting segment 21 and the second connecting segment 22; Alternatively, it may also include a rubber tube, which is sleeved on the outside of the first connecting segment 21, the second connecting segment 22 and the plurality of segments 23, and located between the limiting rings of the first connecting segment 21 and the second connecting segment 22; Alternatively, it may also include a braided mesh and a rubber tube. The braided mesh is fitted over the outside of the first connecting segment 21, the second connecting segment 22, and the plurality of segments 23. The rubber tube is fitted over the outside of the braided mesh and located between the limiting rings of the first connecting segment 21 and the second connecting segment 22. The braided mesh and the rubber tube can be fixed to the outer walls of the first connecting segment 21, the second connecting segment 22, and the plurality of segments 23 by means of bonding or interference fit. By providing a braided mesh, a rubber tube, or a combination of a braided mesh and a rubber tube on the outside of the first connecting segment 21, the second connecting segment 22, and the plurality of segments 23, the structural strength of the bending assembly 4 is increased.

[0065] A reinforcing arm 245 is provided between the opposing inner cantilever arms 242. The reinforcing arm 245 is a rod-shaped or column-shaped structure. The design of the reinforcing arm 245 improves the deformation resistance of the inner cantilever arms 242 and enhances the support stability of the pivot 243.

[0066] The first connecting segment 21, the second connecting segment 22, and the plurality of segments 23 each have a through-hole 25 along their own central axis. The through-hole 25 is used for wires that control the operating component 6 at the front end of the surgical instrument to perform corresponding operations.

[0067] The first connecting segment 21, the second connecting segment 22, and the plurality of segments 23 each have a through wire hole 26 along their own axial direction; both the wire hole 26 and the through hole 25 can pass through the reinforcing arm 245.

[0068] When the two outer cantilever arms 241 and the two inner cantilever arms 242 are respectively fixed to both ends of the segment 23 and form an H-shaped structure in the same cross section, there are two wire holes 26. The two wire holes 26 and the two outer cantilever arms 241 are spaced apart. At this time, the bending directions of the multiple segments 23 are two opposite bending directions.

[0069] When the two outer cantilever arms 241 and the two inner cantilever arms 242 are respectively fixed to both ends of the segment 23 and are spaced apart in the circumferential direction of the segment 23, there are four wire holes 26. The four wire holes 26 are spaced apart in the circumferential direction, so that the multiple segments 23 can bend smoothly in four bending directions.

[0070] In this embodiment, please refer to Figures 1 to 13 An endoscope, comprising the endoscopic surgical instruments described above.

[0071] This instrument can also be used for surgeries inside the stomach, especially those involving the lesser curvature. Because the bending radius of the endoscope is too small, it often fails to reach the target area after bending. This instrument adds a second bending function to the therapeutic endoscope, enabling assisted bending. Specifically, without a catheter, the endoscope is passed through through-holes located in the first connecting segment, the second connecting segment, and multiple segments along its own central axis. The endoscope can be a gastrointestinal endoscope.

[0072] Working principle: When using, when adjusting the angle of the snake bone component 2, the bending handle 4212 drives the rotating column 421 to rotate, which in turn drives the bending component 422 to rotate. The fixing part 4222 of the bending component 422 pulls or pushes the corresponding bending power component 43, causing the snake bone component 2 to bend and deform. The bending of the snake bone component 2 drives the remote operating component 6 to adjust its posture, thereby achieving precise operation of the tissue. When locked, rotating the arm 521 outside the operating handle 1 causes the locking member 522 to rotate on the fixed shaft 41. The outer contour of the rotating locking member 522 pushes the adjusting part 42, causing it to move axially along the fixed shaft 41. The adjusting part 42 drives the abutment part 51, pressing the adjusting part 42 tightly against the inner end face of the operating handle 1. By rotating the arm 521, the user can control the clamping force, thereby achieving locking and making the locking force precisely adjustable. When unlocking, rotating the arm 521 in the opposite direction causes the locking member 522 to rotate back, eliminating its thrust on the adjusting part 42. The abutment part 51 pushes the adjusting part 42 in the opposite direction, bringing the abutment part 51 to its initial state. At this time, the adjusting part 42 can rotate freely, allowing for adjustment of the curvature of the adjustable bending component 4.

[0073] In summary, the present invention, through the design of the bending adjustment component 4, the locking component 5, and the snake-bone component 2, enables the operating components of the surgical instrument to be independently bent and locked relative to the endoscope, thereby enabling efficient tissue dissection and improving the safety, efficiency, and ease of operation of the surgery. By integrating parts of the bending adjustment component 4 and the locking component 5 into the inner cavity 11 of the operating handle 1, the entire operating handle 1 is compact, easy to assemble, reduces manufacturing costs, and is easy for users to hold and operate with one hand, conforming to ergonomic design, reducing operational fatigue, and thus improving efficiency. In delicate surgery, when the surgeon needs to lock the snake-bone component 2 at a specific angle, by applying force to the locking part 52, the locking part 52 rotates, generating an axial driving force. The locking part 52 drives at least one bending part 42 to move axially along the fixed axis 41, so that the abutment part 51 on at least one bending part 42 is pressed against the inner cavity 11 wall of the operating handle 1, preventing any rotation or movement of the bending part 42, thereby locking the bending shape of the snake-bone component 2, making operation simple and quick. By allowing the outer cantilever 241 to elastically deform, such as slightly opening, the rotating shaft 243 on the inner cantilever 242 can be inserted into the rotating hole 244 of the outer cantilever 241, enabling quick plug-and-play assembly without complex tools, thus reducing manufacturing and maintenance costs. After assembly, the outer cantilever 241 returns to its original shape, and the rotating shaft 243 forms a stable rotational fit with the rotating hole 244. The deformation and reset of the outer cantilever 241 provides lateral constraint on the rotating shaft 243, preventing it from falling off and ensuring structural strength during rotation. This provides a stable center of rotation, ensuring precise motion transmission and reducing backlash. The rotating component 24, with its cantilever and rotating shaft 243 structure, occupies little space and is suitable for miniaturized applications. Therefore, this invention effectively overcomes the various shortcomings of the prior art and has high industrial applicability.

[0074] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. An endoscopic surgical instrument, characterized in that, include: An operating handle, wherein an inner cavity is provided on the operating handle; A snake-bone assembly, wherein the snake-bone assembly is connected to the distal end of the operating handle via a conduit; A bending assembly includes a fixed shaft fixedly installed in the inner cavity of the operating handle, at least one bending part, and at least one bending power component. At least one bending part is at least partially rotatably sleeved on the fixed shaft and can move axially along the fixed shaft. At least one bending power component is located inside the guide tube, with its proximal end connected to at least one bending part and its distal end connected to the snake bone assembly. The bending part controls the snake bone assembly to produce bending deformation through the bending power component. A locking assembly includes at least one abutment and a locking part. The number of abutment and the number of bending parts are equal. The abutment is disposed on the bending part, and the locking part is rotatably connected to the fixed shaft to drive at least one bending part to move axially away from the fixed shaft, so that at least one abutment locks the bending part to rotate.

2. The endoscopic surgical instrument according to claim 1, characterized in that: The bending section includes a rotating column, which has a through hole along its own central axis. The through hole is rotatably sleeved on the fixed shaft and can at least partially move along the axial direction of the fixed shaft. The bending component is connected to the far-end snake bone assembly via a bending power component, and the bending component is coaxially fixedly fitted with the rotating column.

3. The endoscopic surgical instrument according to claim 1, characterized in that: The clamping part includes a first elastic element, which is disposed in contact with the bending part. The locking part drives the bending part to move axially away from the fixed axis, so that the first elastic element is compressed to lock the bending part from rotating.

4. The endoscopic surgical instrument according to claim 1, characterized in that: The clamping part includes multiple indexing teeth, which are spaced apart on the bending part, and grooves are formed between adjacent indexing teeth. The second abutment ring has one end fixedly connected to the operating handle, and the other end of the second abutment ring has a toothed structure that matches the toothed groove when locked. The second elastic element is used to reset the bending part toward one end of the fixed shaft.

5. The endoscopic surgical instrument according to claim 1, characterized in that: The locking part includes a rotating arm, and the operating handle has a locking groove, through which the rotating arm extends to the outside of the operating handle; A locking component is rotatably connected to the fixed shaft. By rotating the rotating arm, the locking component drives the bending part to move axially along the fixed shaft. The bending part is locked in place by the abutment.

6. The endoscopic surgical instrument according to claim 1, characterized in that: The operating handle includes a first handle body and a second handle body, which are connected by a snap-fit ​​structure. The fixed shaft is installed in the inner cavity and is integrally formed with the first handle body by injection molding.

7. The endoscopic surgical instrument according to claim 1, characterized in that: The snake bone assembly includes a first connecting segment located at the distal end of the operating handle; A second connecting segment, the proximal end of which is connected to the catheter; Multiple segments, wherein the multiple segments are disposed between the first connecting segment and the second connecting segment; A plurality of rotating components are provided, which respectively rotatably connect the proximal end of the first connecting segment to the distal end of the segment adjacent to it, between adjacent segments, and between the distal end of the second connecting segment and the proximal end of the segment adjacent to it. Each rotating component includes two oppositely arranged outer cantilever arms, each fixedly connected to one end of the segment, two oppositely arranged inner cantilever arms, each fixedly connected to the other end of the segment, and at least one rotating shaft. At least one rotating shaft is perpendicularly fixed to the inner cantilever arm, and the outer cantilever arm has a rotating hole that rotatably engages with the rotating shaft. When the rotating component is connected, the outer cantilever is deformed to rotate the shaft and the rotating hole together.

8. The endoscopic surgical instrument according to claim 7, characterized in that: The two outer cantilever arms and the two inner cantilever arms are respectively fixed to both ends of the segment and are located in the same cross section to form an H-shaped structure, so that the bending directions of the multiple segments are two opposite bending directions.

9. The endoscopic surgical instrument according to claim 7, characterized in that: The two outer cantilever arms and the two inner cantilever arms are respectively fixed to both ends of the segment and are staggered at intervals in the circumferential direction of the segment so that the bending direction of the multiple segments is four directions.

10. An endoscope, characterized in that: Includes the endoscopic surgical instruments as described in any one of claims 1-9.

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