Endoscope

Abstract

The utility model provides an endoscope which comprises an insertion part, a bending part and an operation part, the operation part comprises a handle assembly, a transmission mechanism and a pull wire, and the transmission mechanism at least comprises a gear structure and a rack structure which are matched with each other; the rack structure comprises at least one rack, the operation part comprises an adapter and at least one connecting piece, the adapter is connected with the rack and does not move relative to the rack, an adapter channel is formed in the adapter and used for allowing a pull wire to penetrate through, and the adapter is provided with a through hole communicated with the adapter channel; the connecting piece is used for entering the switching channel through the through hole so as to connect the switching piece and the pull wire. According to the endoscope provided by the invention, the pull wire can be isolated from the rack through the arrangement of the adapter, and the installation position of the pull wire can be adjusted or the pull wire can be maintained and replaced by removing the connection relation between the connecting piece and the adapter or reducing the connection tightness of the connecting piece to the adapter and the pull wire; and the probability of stress deformation of the pull wire caused by welding is reduced.

Description

Technical Field

[0001] This application relates to the field of medical devices, and more particularly to an endoscope. Background Technology

[0002] In related technologies, the traction wire is fixed to the rack by welding. On the one hand, the welded traction wire is not easy to remove from the rack, which is inconvenient for disassembly and maintenance, and it is also inconvenient to adjust the installation position of the traction wire. On the other hand, welding will cause deformation and stress concentration. After repeated movement of the rack, the connection between the traction wire and the rack is at high risk of failure and breakage, which reduces the working reliability of the endoscope. Utility Model Content

[0003] In view of this, the embodiments of this application aim to provide an endoscope, an adapter and a connector that facilitate the assembly and disassembly of the traction cable, reduce the probability of stress deformation of the traction cable caused by welding, and increase the working reliability of the endoscope.

[0004] This application provides an endoscope, including:

[0005] Insertion section and curved section;

[0006] The operating unit includes a handle assembly, a transmission mechanism, and a traction cable. The insertion part connects the handle assembly and the bending part. The transmission mechanism is at least partially disposed within the handle assembly and includes at least a set of cooperating gear structures and rack structures. One end of the traction cable is connected to the rack structure, and the other end passes through the handle assembly and the insertion part and is connected to the bending part. The rack structure can convert the rotational motion of the gear structure into linear motion to drive the traction cable to drive the bending part to bend in the vertical and / or horizontal directions.

[0007] The rack structure includes at least one rack, the operating part includes an adapter, the adapter is connected to the rack and there is no relative movement between them, the adapter has an adapter channel for the traction line to pass through, the operating part includes at least one connector, the adapter has a through hole communicating with the adapter channel, and the connector is used to enter the adapter channel through the through hole to connect the adapter and the traction line.

[0008] In some embodiments, the extension direction of the adapter channel is parallel to the extension direction of the rack, and the through hole is disposed on one side of the adapter along a first direction, wherein the first direction intersects the extension direction of the rack.

[0009] In some implementations, the connector is threaded into the through hole.

[0010] In some embodiments, the rack includes teeth and a mounting portion, the teeth being used to mesh with a gear structure, the mounting portion being connected to the end of the teeth away from the gear structure, the mounting portion being provided with a mounting groove, and the adapter being disposed within the mounting groove;

[0011] The mounting part is provided with a clearance opening at at least one end along the extension direction of the rack. The clearance opening is connected to the mounting groove and is used to avoid the traction line passing through the transition channel.

[0012] In some embodiments, the mounting groove protrudes inward on at least one inner sidewall along the second direction to form a protrusion, and the outer sidewall of the adapter is recessed inward along the second direction to form a groove. The protrusion engages with the groove to limit the displacement of the adapter within the mounting groove.

[0013] Alternatively, the inner wall of at least one side of the mounting groove is recessed outward along the second direction to form a groove, and the outer wall of the adapter protrudes outward along the second direction to form a protrusion, the protrusion engaging with the groove to restrict the displacement of the adapter within the mounting groove.

[0014] The second direction intersects with the extending direction of the rack.

[0015] In some implementations, the number of traction wires is at least two, the endoscope includes a connecting ring disposed at the end of the insertion portion away from the bend, the connecting ring forms at least two circumferentially spaced positioning grooves, and the at least two traction wires are respectively passed through the positioning grooves to position the traction wires.

[0016] In some embodiments, the endoscope includes a flexible sleeve that is fitted at least at the portion of the traction cable located at the insertion portion, and the flexible sleeve and the traction cable are integrally inserted into the positioning groove.

[0017] In some implementations, the positioning groove is a through-hole structure, and the connecting ring itself defines the through-hole structure;

[0018] Alternatively, the positioning groove is formed by the inward indentation of the circumferential outer wall of the connecting ring, at least a portion of the connecting ring is disposed within the insertion portion, the opening of the positioning groove faces the inner wall of the insertion portion, and the traction wire passes through the space jointly defined by the positioning groove and the inner wall of the insertion portion.

[0019] In some embodiments, the connecting ring includes an annular body and at least one extension structure, the positioning groove is formed in the annular body, the end of the annular body away from the bend is folded outward to form the extension structure, an insertion space is defined between the extension structure and the outer wall of the annular body, the end of the insertion portion away from the bend is inserted into the insertion space, and the extension structure is bonded to the insertion portion.

[0020] In some implementations, the connecting ring is a one-piece stamped metal part.

[0021] In some implementations, the adapter is a one-piece metal component.

[0022] The endoscope provided in this application embodiment has an adapter that, on the one hand, isolates the traction cable from the rack, eliminating the need for the traction cable to be connected to the rack. The linear movement of the rack can be transmitted to the traction cable through the adapter, increasing the reliability of the traction cable's movement. On the other hand, by connecting the adapter to the traction cable through a connector, the installation position of the traction cable can be adjusted or the traction cable can be repaired or replaced by disconnecting the connector from the adapter or reducing the tightness of the connector's connection between the adapter and the traction cable. This provides high operational convenience. Furthermore, the connector can also reduce the probability of stress deformation of the traction cable caused by welding while fixing it, increasing the operational reliability of the endoscope. Attached Figure Description

[0023] Figure 1 This is a partial structural diagram of an endoscope according to an embodiment of this application;

[0024] Figure 2 for Figure 1 A schematic diagram showing the fit between the rack, adapter, connector, and traction line;

[0025] Figure 3 This is a schematic diagram of a partial structure of an endoscope according to an embodiment of this application;

[0026] Figure 4 This is a schematic diagram illustrating the cooperation between the insertion part, the traction wire, and the connecting ring according to an embodiment of this application;

[0027] Figure 5 for Figure 2 An exploded view of the structure shown.

[0028] Explanation of reference numerals in the attached figures

[0029] 10-Handle assembly; 11-Gear structure; 12-Rack structure; 121-Tooth; 122-Mounting part; 122a-Mounting groove; 122b-Clearing opening; 122c-Protrusion;

[0030] 13-Adapter; 13a-Adapter channel; 13b-Through hole; 13c-Groove; 14-Connector; 15-Traction line; 16-Insertion part; 17-Connecting ring; 171-Annular body; 171a-Positioning groove; 172-Extension structure; 172a-Insertion space; 18-Elastic sleeve. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0032] The specific technical features described in the specific embodiments can be combined in any suitable manner without contradiction. For example, different combinations of specific technical features can form different embodiments and technical solutions. To avoid unnecessary repetition, the various possible combinations of the specific technical features in this invention will not be described separately.

[0033] In the following description, the terms "first," "second," etc., are used merely to distinguish different objects and do not indicate that the objects have the sameness or relationship. It should be understood that the directional descriptions "above," "below," "outside," and "inside" refer to the orientation under normal use conditions, while "left" and "right" refer to the left and right directions shown in the corresponding diagrams, which may or may not be the left and right directions under normal use conditions.

[0034] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. "A plurality of" means two or more.

[0035] This application provides an endoscope.

[0036] Taking the application of endoscopy in the field of medical technology as an example, an endoscope is used to enter the human body or animal through natural cavities or surgical openings. With the help of an endoscope, lesions in the human body or animal can be observed, diagnosed, and treated. For example, an endoscope can be a duodenoscope.

[0037] The endoscope includes an insertion section 16, a bending section, and an operating section.

[0038] The insertion section 16 is the longest part of the endoscope. It can be made of a soft, flexible material to facilitate entry into the body through natural cavities or small incisions in the human or animal body. The insertion section 16 may include imaging devices such as fiber optics or a camera to capture images inside the body and transmit them to an external monitor for observation by medical personnel. Alternatively, the insertion section 16 may also have a working channel, which allows medical personnel to easily introduce small surgical instruments or other medical devices through the endoscope for procedures such as biopsies and removal of foreign objects under direct vision.

[0039] The curved part is located at the front end of the insertion part 16. Medical staff can flexibly control the direction and degree of curvature of the curved part by operating the operating part, so as to accurately adjust the angle of the endoscope and ensure that the specific location to be examined can be reached.

[0040] Please see Figures 1 to 5 The operating part includes a handle assembly 10, a transmission mechanism, and a traction cable 15. An insertion part 16 connects the handle assembly 10 and the bending part. The transmission mechanism is at least partially disposed within the handle assembly 10. The transmission mechanism includes at least a set of mutually cooperating gear structures 11 and rack structures 12. One end of the traction cable 15 is connected to the rack structure 12, and the other end passes through the handle assembly 10 and the insertion part 16 and is connected to the bending part. The rack structure 12 can convert the rotational motion of the gear structure 11 into linear motion to drive the traction cable 15 to drive the bending part to bend in the up-down direction and / or left-right direction.

[0041] The rack structure 12 includes at least one rack, and the operating part includes an adapter 13. The adapter 13 is connected to the rack and there is no relative movement between them. An adapter channel 13a is formed in the adapter 13 for the traction line 15 to pass through. The operating part includes at least one connector 14. The adapter 13 has a through hole 13b that communicates with the adapter channel 13a. The connector 14 is used to enter the adapter channel 13a through the through hole 13b to connect the adapter 13 and the traction line 15.

[0042] Understandably, the handle assembly 10 is intended for the operator to hold in order to perform the corresponding operations.

[0043] The transmission mechanism is at least partially disposed within the handle assembly 10. This means that the entire structure of the transmission mechanism is disposed within the space defined by the handle assembly 10 and is not visible from the outside. Alternatively, a portion of the transmission mechanism may be disposed within the space defined by the handle assembly 10, while the other portion may be disposed outside the handle assembly 10.

[0044] The transmission mechanism includes at least a set of mutually cooperating gear structure 11 and rack structure 12. Here, gear structure 11 may include one or more gears, and rack structure 12 may include one or more racks. Rack structure 12 can convert the rotational motion of gear structure 11 into linear motion. The linear motion of rack structure 12 is transmitted to the bending part through traction line 15, thereby realizing the bending part bending in the up-down direction and / or left-right direction.

[0045] Here, the bending of the curved portion in the vertical or horizontal direction can be achieved by a set of mutually cooperating gear structures 11 and rack structures 12. For example, the gear structure 11 includes a driving gear and a driven gear, and the rack structure 12 includes two racks. The driving gear meshes with the driven gear, and the driven gear meshes with each of the two racks. The two racks are connected to different traction lines 15, so that the bending of the curved portion in the vertical or horizontal direction can be achieved by the movement of the two racks.

[0046] Understandably, bending of the curved section in both vertical and horizontal directions can be achieved using two sets of gear structures 11 and rack structures 12. The two sets of gear structures 11 and rack structures 12 do not interfere with each other; one set achieves bending in the vertical direction, and the other set achieves bending in the horizontal direction. Each set of gear structures 11 may include one driving gear and one driven gear, and the rack structure 12 includes two racks. The driving gear meshes with the driven gear, and the driven gear meshes with each of the two racks. The two racks are connected to different traction lines 15.

[0047] The connection between the adapter 13 and the rack and the absence of relative movement between them means that during the movement of the transmission mechanism, the adapter 13 and the rack are relatively stationary, without any relative sliding or rotation, and the connection between the adapter 13 and the rack is fixed and stable.

[0048] The adapter channel 13a is used for the traction wire 15 to pass through, and the through hole 13b is used to provide a channel for the connector 14 to connect with the adapter 13 and the traction wire 15. The connector 14 can pass through the through hole 13b to enter the adapter channel 13a, thereby connecting the adapter 13 and the traction wire 15. In this way, the traction wire 15 is fixed in the adapter 13 through the connector 14. When the rack moves linearly, the traction wire 15 can move linearly accordingly.

[0049] It is understandable that the connector 14 can lock the traction line 15 by applying a certain clamping force to the traction line 15, thereby connecting the traction line 15 to the adapter 13.

[0050] The number of connectors 14 can be one or more. Connectors 14 can be fasteners such as screws and bolts.

[0051] Understandably, in related technologies, the traction wire is fixed to the rack by welding. On the one hand, the welded traction wire is not easy to remove from the rack, making disassembly and maintenance inconvenient, and it is also inconvenient to adjust the installation position of the traction wire. On the other hand, welding will cause deformation and stress concentration. After repeated movement of the rack, the connection between the traction wire and the rack is at high risk of failure and breakage, reducing the working reliability of the endoscope.

[0052] The endoscope provided in this embodiment has an adapter 13 that, on the one hand, isolates the traction wire 15 from the rack, eliminating the need for the traction wire 15 to be connected to the rack. The linear movement of the rack can be transmitted to the traction wire 15 through the adapter 13, increasing the reliability of the traction wire 15's movement. On the other hand, by connecting the adapter 13 and the traction wire 15 through the connector 14, the installation position of the traction wire 15 can be adjusted or the traction wire 15 can be repaired or replaced by disconnecting the connector 14 from the adapter 13 or reducing the tightness of the connection between the connector 14 and the adapter 13. This provides high operational convenience. Furthermore, the connector 14 can also reduce the probability of stress deformation of the traction wire 15 caused by welding while fixing the traction wire 15, increasing the operational reliability of the endoscope.

[0053] In some embodiments, please refer to Figure 2 The extension direction of the adapter channel 13a is parallel to the extension direction of the rack, and the through hole 13b is provided on one side of the adapter 13 along the first direction, wherein the first direction intersects with the extension direction of the rack.

[0054] In other words, there is no angle between the extension direction of the transition channel 13a and the extension direction of the rack. Thus, when the rack moves in a straight line, the transition piece 13 and the traction line 15 located in the transition channel 13a can also move synchronously with the rack, increasing the consistency of movement.

[0055] The through hole 13b is provided on one side of the adapter 13 along the first direction, that is, the through hole 13b is provided on the side of the adapter 13 that is different from its extension direction. In this way, the connector 14 can connect the adapter 13 and the traction line 15 without affecting the passage of the traction line 15 in the adapter channel 13a.

[0056] The first direction intersects the extension direction of the rack, meaning that the first direction is not parallel to the extension direction of the rack. For example, the first direction is perpendicular to the extension direction of the rack.

[0057] In some embodiments, please refer to Figure 2 The connector 14 is threaded into the through hole 13b.

[0058] In this embodiment, the connector 14 can be a fastening screw, and the inner wall of the through hole 13b can be provided with internal threads. During assembly, the fastening screw is inserted into the through hole 13b and directly threaded into the internal threads. The traction line 15 is fixed by adjusting the screw's insertion depth. The assembly is simple, stable, and reliable.

[0059] In some embodiments, please refer to Figure 2 The rack includes a toothed portion 121 and a mounting portion 122. The toothed portion 121 is used to mesh with the gear structure 11. The mounting portion 122 is connected to the end of the toothed portion 121 away from the gear structure 11. The mounting portion 122 is provided with a mounting groove 122a, and the adapter 13 is disposed in the mounting groove 122a.

[0060] Mounting slot 122a provides a mounting position for adapter 13. At the same time, mounting slot 122a can also position the adapter 13 and limit the sliding of adapter 13 relative to the rack, so as to increase the installation reliability of adapter 13.

[0061] Please see Figure 1 and Figure 2 The mounting part 122 is provided with a clearance opening 122b at at least one end along the extension direction of the rack. The clearance opening 122b is connected to the mounting groove 122a and is used to avoid the traction line 15 passing through the transfer channel 13a.

[0062] Here, the mounting part 122 may have a clearance opening 122b at one end along the extension direction of the rack, or the mounting part 122 may have clearance openings 122b at both ends along the extension direction of the rack. The clearance opening 122b facilitates the traction wire 15 to pass through the adapter channel 13a and then exit the rack through the clearance opening 122b to connect with the front curved part. The clearance opening 122b also facilitates the portion of the traction wire 15 that extends beyond the adapter channel 13a away from the curved part to pass through, thus providing sufficient extension space for the traction wire 15.

[0063] In some embodiments, please refer to Figure 2 The mounting groove 122a protrudes inward along at least one inner sidewall in the second direction to form a protrusion 122c, and the outer sidewall of the adapter 13 is recessed inward along the second direction to form a groove 13c. The protrusion 122c and the groove 13c cooperate to limit the displacement of the adapter 13 in the mounting groove 122a. The second direction intersects with the extension direction of the rack.

[0064] In this embodiment, the position of the adapter 13 in the mounting groove 122a is determined by the cooperation between the protrusion 122c and the groove 13c. The groove 13c and the protrusion 122c can restrict the sliding and rotation of the adapter 13 in the mounting groove 122a, thereby restricting the movement of the adapter 13 relative to the rack, so that there is no relative movement between the adapter 13 and the mounting groove 122a. At the same time, when it is necessary to replace the adapter 13, it can be replaced directly by disengaging the groove 13c and the protrusion 122c, which is highly convenient.

[0065] In addition, the cooperation between the protrusion 122c and the groove 13c can also be in different positions from the adapter channel 13a and the through hole 13b, without affecting the setting of the traction line 15 and the connector 14.

[0066] For example, the second direction can be perpendicular to the extension direction of the rack. The second direction, the first direction, and the extension direction of the rack can be perpendicular to each other.

[0067] It is understandable that the positions of the groove 13c and the protrusion 122c can be interchanged, that is, the groove 13c can be formed in the mounting groove 122a, and the protrusion 122c can be formed in the adapter 13.

[0068] In some exemplary embodiments, the mounting groove 122a is recessed outward on at least one inner sidewall along the second direction to form a groove, and the outer sidewall of the adapter 13 protrudes outward along the second direction to form a protrusion. The protrusion engages with the groove to limit the displacement of the adapter 13 within the mounting groove 122a.

[0069] In some embodiments, please refer to Figures 3 to 5 The number of traction wires 15 is at least two. The endoscope includes a connecting ring 17, which is located at the end of the insertion portion 16 away from the bend. The connecting ring 17 has at least two positioning grooves 171a spaced apart in the circumferential direction. At least two traction wires 15 are respectively passed through the positioning grooves 171a to position the traction wires 15.

[0070] It is understandable that when there are multiple traction lines 15 to achieve the bending function in the vertical and / or horizontal directions, it is necessary to distinguish the position and direction of each traction line 15 inserted into the insertion part 16 through the bending part, and determine the position and installation direction of each traction line 15 to facilitate the docking of each traction line 15 with different racks.

[0071] In this embodiment, by setting a positioning groove 171a on the connecting ring 17, the position and direction of the traction line 15 can be determined, reducing the probability of installation errors or cross-entanglement of the traction lines 15, increasing the installation reliability of the traction line 15, and also making it easier for the traction line 15 to move along a preset trajectory to achieve reliable bending of the curved part.

[0072] For example, during assembly, each traction wire 15 can be connected to the bending part first, and then the insertion part 16 can be connected to the bending part. At this time, the insertion part 16 is fitted onto each traction wire 15, and the positioning groove 171a on the connecting ring 17 is used to position the traction wire 15 at the end of the insertion part 16 near the rack structure 12.

[0073] For example, each positioning groove 171a may extend along the extension direction of the corresponding traction line 15.

[0074] In some embodiments, please refer to Figure 4 and Figure 5 The endoscope includes an elastic sleeve 18, which is at least fitted onto the portion of the traction wire 15 located at the insertion part 16. The elastic sleeve 18 and the traction wire 15 are integrally inserted into the positioning groove 171a.

[0075] In this embodiment, the elastic sleeve 18 can guide and protect the traction wire 15 located at the insertion part 16, making it easier for the traction wire 15 to move along a preset trajectory and reducing the probability of deformation and bending of the traction wire 15. At the same time, the elastic sleeve 18 and the traction wire 15 are integrally inserted into the positioning groove 171a, which can reduce the probability of the traction wire 15 shaking in the positioning groove 171a by utilizing the elastic properties of the elastic sleeve 18, thereby increasing the positioning reliability.

[0076] The specific structure and formation method of the positioning groove 171a are not limited.

[0077] In some embodiments, the positioning groove 171a is a through hole structure, and the connecting ring 17 itself defines the through hole structure.

[0078] In other words, by providing a through hole structure on the connecting ring 17, the portion of the traction wire 15 that passes through the positioning groove 171a is located within the space defined by the inner wall of the through hole structure. In this embodiment, the positioning groove 171a is a through hole structure, which can increase the positioning reliability of the positioning groove 171a for the traction wire 15 and reduce the probability of the traction wire 15 coming out of the positioning groove 171a.

[0079] In other embodiments, please refer to Figure 4 and Figure 5 The positioning groove 171a is formed by the inward indentation of the circumferential outer wall of the connecting ring 17. At least a portion of the connecting ring 17 is disposed in the insertion part 16. The opening of the positioning groove 171a faces the inner wall of the insertion part 16. The traction wire 15 passes through the space defined by the positioning groove 171a and the inner wall of the insertion part 16.

[0080] In other words, the inner wall of the positioning groove 171a and its corresponding insertion part 16 can define a hole-like space. Under the combined action of the positioning groove 171a and its corresponding insertion part 16, the positioning reliability of the traction wire 15 by the positioning groove 171a can be increased, and the probability of the traction wire 15 coming out of the positioning groove 171a can be reduced.

[0081] In some embodiments, please refer to Figure 4 and Figure 5 The connecting ring 17 includes an annular body 171 and at least one extension structure 172. A positioning groove 171a is formed in the annular body 171. The end of the annular body 171 away from the bend is folded outward to form the extension structure 172. An insertion space 172a is defined between the extension structure 172 and the outer wall of the annular body 171. The end of the insertion part 16 away from the bend is inserted into the insertion space 172a. The extension structure 172 is bonded to the insertion part 16.

[0082] In this embodiment, the connection ring 17 and the insertion part 16 are connected by the insertion part 16 and the extension structure 172. After the insertion is completed, the connection ring 17 and the insertion part 16 are fixed by adhesive bonding. In this way, there will be no relative movement between the connection ring 17 and the insertion part 16, so the position of the traction line 15 can be determined and will not shift with the position of the connection ring 17.

[0083] In some embodiments, the connecting ring 17 is a one-piece stamped metal part.

[0084] In this embodiment, the connecting ring 17 is a one-piece manufactured structure, which has low production cost, is easy to assemble, and reduces assembly steps. The use of stamping allows for controllable dimensional accuracy of the connecting ring 17, increasing product consistency.

[0085] The metal component provides structural strength to the connecting ring 17, facilitating connection. For example, the connecting ring 17 can be made of stamped brass.

[0086] In some embodiments, the adapter 13 is a one-piece metal component.

[0087] In this embodiment, the adapter 13 is a one-piece manufactured structure, which has low production cost, is easy to assemble, and reduces assembly steps.

[0088] The metal parts provide a certain structural strength for the adapter 13, making it easy to connect with the connector 14.

[0089] In the description of this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments of this application. In this application, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine different embodiments or examples described in this application, as well as features of different embodiments or examples.

[0090] The above description is merely a preferred embodiment of this application and is not intended to limit the application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. An endoscope, characterized by, include: Insertion section and curved section; The operating unit includes a handle assembly, a transmission mechanism, and a traction cable. The insertion part connects the handle assembly and the bending part. The transmission mechanism is at least partially disposed within the handle assembly and includes at least a set of cooperating gear structures and rack structures. One end of the traction cable is connected to the rack structure, and the other end passes through the handle assembly and the insertion part and is connected to the bending part. The rack structure can convert the rotational motion of the gear structure into linear motion to drive the traction cable to drive the bending part to bend in the vertical and / or horizontal directions. The rack structure includes at least one rack, the operating part includes an adapter, the adapter is connected to the rack and there is no relative movement between them, the adapter has an adapter channel for the traction line to pass through, the operating part includes at least one connector, the adapter has a through hole communicating with the adapter channel, and the connector is used to enter the adapter channel through the through hole to connect the adapter and the traction line.

2. The endoscope of claim 1, wherein, The extension direction of the adapter channel is parallel to the extension direction of the rack, and the through hole is disposed on one side of the adapter along a first direction, wherein the first direction intersects the extension direction of the rack.

3. The endoscope of claim 1, wherein, The connector is threaded into the through hole.

4. The endoscope of claim 1, wherein, The rack includes a toothed portion and a mounting portion. The toothed portion is used to mesh with a gear structure. The mounting portion is connected to the end of the toothed portion away from the gear structure. The mounting portion is provided with a mounting groove, and the adapter is disposed in the mounting groove. The mounting part is provided with a clearance opening at at least one end along the extension direction of the rack. The clearance opening is connected to the mounting groove and is used to avoid the traction line passing through the transition channel.

5. The endoscope of claim 4, wherein, The mounting groove protrudes inward on at least one inner sidewall along the second direction to form a protrusion, and the outer sidewall of the adapter is recessed inward along the second direction to form a groove. The protrusion engages with the groove to limit the displacement of the adapter within the mounting groove. Alternatively, the inner wall of at least one side of the mounting groove is recessed outward along the second direction to form a groove, and the outer wall of the adapter protrudes outward along the second direction to form a protrusion, the protrusion engaging with the groove to restrict the displacement of the adapter within the mounting groove. The second direction intersects with the extending direction of the rack.

6. The endoscope of claim 1, wherein, The number of traction wires is at least two. The endoscope includes a connecting ring, which is disposed at the end of the insertion portion away from the curved portion. The connecting ring forms at least two positioning grooves spaced apart circumferentially. The at least two traction wires are respectively passed through the positioning grooves to position the traction wires.

7. The endoscope of claim 6, wherein, The endoscope includes an elastic sleeve, which is at least fitted over the portion of the traction cable located at the insertion part, and the elastic sleeve and the traction cable are integrally inserted into the positioning groove.

8. The endoscope of claim 6, wherein, The positioning groove is a through hole structure, and the connecting ring itself defines the through hole structure; Alternatively, the positioning groove is formed by the inward indentation of the circumferential outer wall of the connecting ring, at least a portion of the connecting ring is disposed within the insertion portion, the opening of the positioning groove faces the inner wall of the insertion portion, and the traction wire passes through the space jointly defined by the positioning groove and the inner wall of the insertion portion.

9. The endoscope of claim 6, wherein, The connecting ring includes an annular body and at least one extension structure, the positioning groove being formed in the annular body; the end of the annular body away from the curved portion is folded outward to form the extension structure, an insertion space is defined between the extension structure and the outer wall of the annular body, the end of the insertion portion away from the curved portion is inserted into the insertion space; the extension structure is bonded to the insertion portion.

10. The endoscope of claim 6, wherein, The connecting ring is a one-piece stamped metal part.

11. The endoscope of any one of claims 1-10, wherein, The adapter is a one-piece metal component.

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