Insertion portion and endoscope

Abstract

The present invention discloses an insertion part and an endoscope, and relates to the technical field of medical devices. The insertion part includes: an active bending section, a passive bending section, a first limiting structure, a second sleeve and a traction rope. By setting the first limiting structure in the passive bending section, a limiting channel is formed inside the first limiting structure, and the second sleeve is set in the limiting channel. The second sleeve can be movably set along the axial direction of the limiting channel in the limiting channel, and can selectively extend into the wire hole of the serpentine segment in the active bending section. The traction rope is set in the second sleeve and can be movable along the axial direction of the second sleeve. The traction rope is also connected to the serpentine segment at the distal end. The traction rope can be used to pull the active bending section to bend, and the second sleeve can be used to change the bending radius of the active bending section. Therefore, the insertion part provided in the embodiment of the present application can realize the adjustable bending radius of the active bending section.

Description

Technical Field

[0001] The present invention relates to the technical field of endoscopes, and in particular to an insertion portion and an endoscope. Background Art

[0002] An endoscope is a commonly used medical device used to directly access the body's natural passages, providing doctors with sufficient diagnostic information to treat diseases.

[0003] In the prior art, the bending radius of the active bending section of an endoscope is usually certain. In order to enable the endoscope to move more flexibly in the natural channels of the human body, the smaller the bending radius of the active bending section is, the better. However, in surgeries with larger internal spaces, such as the kidney, due to the larger space within the kidney, the distal end of the active bending section with a small bending radius is difficult to reach the farthest end of the space within the kidney, which is not conducive to the surgeon performing the surgery. The active bending section with a larger bending radius has the problem of poor flexibility when moving in the natural channels of the human body. Summary of the Invention

[0004] The present invention discloses an insertion portion and an endoscope, so as to solve the technical problem existing in the related art that it is difficult for a doctor to accurately or quickly insert the endoscope into the common bile duct or the common pancreatic duct.

[0005] In order to solve the above problems, the present invention adopts the following technical solutions:

[0006] On the one hand, an embodiment of the present application provides an insertion portion, comprising: an active bending section, a passive bending section, a first limiting structure, a second sleeve and a traction rope. The active bending section comprises a plurality of mutually connected serpentine segments, each of which is provided with a wire-passing hole. The passive bending section is connected to the proximal end of the active bending section. The first limiting structure is connected to the passive bending section, and the first limiting structure forms a limiting channel, the axial direction of the limiting channel being the same as the extension direction of the passive bending section. The second sleeve is arranged in the limiting channel and is movably arranged along the axial direction of the limiting channel, and the second sleeve can be selectively extended into the wire-passing hole. The traction rope is arranged in the second sleeve and is movably arranged along the axial direction of the second sleeve, and the traction rope is connected to the serpentine segment at the distal end.

[0007] In one embodiment, the size of the proximal end of the wire hole is larger than the size of the distal end of the wire hole;

[0008] and / or, the deflection of the second sleeve is greater than the deflection of the first limiting structure;

[0009] And / or, one of the snake bone segments has a limiter, and the limiter is used to limit the second sleeve from moving toward the distal end of the active bending section;

[0010] And / or, at least a portion of the distal end of the second sleeve is a spring tube.

[0011] In one embodiment, at least a portion of the distal end of the second sleeve is a spring tube, and the length of the spring tube is smaller than the length of the snake bone segment.

[0012] On the other hand, an embodiment of the present application also provides an endoscope, including a handle portion and an insertion portion as described above, wherein the handle portion includes: a shell and a sleeve drive assembly, wherein the sleeve drive assembly is disposed in the shell, and the sleeve drive assembly is connected to the second sleeve and is used to drive the second sleeve to selectively extend into the wire hole.

[0013] In one embodiment, the sleeve drive assembly includes: a driving member and a connecting block, the connecting block is slidably arranged in the outer shell, and the two second sleeves are connected to the connecting block. Within the sliding area of the connecting block, the extension direction of the second sleeve is the same as the sliding direction of the connecting block.

[0014] In one embodiment, the endoscope further includes: a second limiting structure, the second limiting structure is arranged in the outer shell, the second limiting structure has a wire passing channel, the traction rope is passed through the wire passing channel, and the second limiting structure is used to limit the radial movement of the traction rope.

[0015] In one embodiment, the driving member includes: a second toggle wheel, a second rotating wheel, a third rotating wheel and a transmission member, the second toggle wheel is arranged on the outside of the shell, the second toggle wheel and the second rotating wheel are connected by a connecting rod, the second rotating wheel is engaged with the third rotating wheel, the transmission member is engaged with the third rotating wheel, and the transmission member is connected to the connecting block, the second toggle wheel is configured to drive the second rotating wheel to rotate during the rotation process, and then drive the third rotating wheel to rotate, and then drive the transmission member to drive the second sleeve, and make the second sleeve move in the axial direction of the limiting channel.

[0016] In one embodiment, the endoscope further comprises: a cannula locking assembly, wherein the cannula locking assembly is used to selectively lock or unlock the second rotating wheel.

[0017] In one embodiment, the sleeve locking assembly includes: a third toggle wheel, a fourth rotating wheel and a fixed wheel, the third toggle wheel is arranged on the outside of the shell, the third toggle wheel and the fourth rotating wheel are connected by a rotating rod, the fixed wheel is located between the second rotating wheel and the fourth rotating wheel and the fixed wheel is threadedly engaged with the fourth rotating wheel, and the third toggle wheel is configured to drive the fourth rotating wheel to rotate during rotation and then drive the fixed wheel to abut against the second rotating wheel to limit the rotation of the second rotating wheel.

[0018] In one embodiment, one of the outer periphery of the fixed wheel and the interior of the housing is provided with a protrusion, and the other is provided with a groove that cooperates with the protrusion, and the depth direction of the groove is the axial direction of the third driving wheel;

[0019] And / or, the transmission member is connected to the middle part of the connecting block, the extension direction of the transmission member is parallel to the moving direction of the second sleeve, and the two second sleeves are symmetrically arranged with respect to the extension direction of the transmission member;

[0020] And / or, the transmission member and the second rotating wheel are arranged in different planes;

[0021] And / or, the endoscope also includes: a traction rope drive assembly, the traction rope drive assembly includes: a first toggle wheel and a first rotating wheel, the first toggle wheel is arranged on the outside of the shell, the first toggle wheel and the first rotating wheel are connected by a connecting rod, the first rotating wheel is connected to the traction rope, the first toggle wheel is configured to drive the first rotating wheel to rotate during rotation and then drive the traction rope to pull the active bending section, the first toggle wheel, the second toggle wheel and the third toggle wheel are arranged on the same side of the shell.

[0022] The technical solution adopted by the present invention can achieve the following beneficial effects:

[0023] The insertion portion provided in the embodiment of the present application is provided with a first limiting structure in the passive bending section, a limiting channel is formed inside the first limiting structure, and a second sleeve is provided in the limiting channel. The second sleeve can be movably provided in the limiting channel along the axial direction of the limiting channel, and can selectively extend into the wire hole of the serpentine segment in the active bending section. The traction rope is provided in the second sleeve and can be movable along the axial direction of the second sleeve. The traction rope is also connected to the serpentine segment at the distal end. The traction rope can be used to pull the active bending section to bend, and the second sleeve can be used to change the bending radius of the active bending section. Therefore, the insertion portion provided in the embodiment of the present application can realize the adjustable bending radius of the active bending section, solving the problem in the prior art that the active bending section of the endoscope has a fixed bending radius, the bending radius is too small to reach the farthest end of a large empty point, and the bending radius is too large to move flexibly in the natural channel of the human body. When the above-mentioned insertion portion is applied to an endoscope, the above-mentioned problem can also be solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 A schematic structural diagram of an endoscope in one embodiment of the present application is shown;

[0026] Figure 2 A schematic structural diagram of an insertion portion in one embodiment of the present application is shown;

[0027] Figure 3 yes Figure 2 Enlarged view of point A in the middle.

[0028] Figure 4 A cross-sectional view of an inserting portion in an embodiment of the present application is shown.

[0029] Figure 5 A schematic structural diagram of a snake bone segment in an insertion portion in an embodiment of the present application is shown.

[0030] Figure 6 A structural schematic diagram of a snake bone segment in an insertion portion in an embodiment of the present application is shown from another perspective.

[0031] Figure 7 A cross-sectional view of a cross section of an endoscope in one embodiment of the present application is shown.

[0032] Figure 8A cross-sectional view of another cross section of an endoscope in one embodiment of the present application is shown.

[0033] Figure 9 An assembly diagram of a cannula drive assembly, a traction rope drive assembly, a cannula locking assembly, a traction rope, and a second limiting structure in an endoscope in one embodiment of the present application is shown.

[0034] In the figure: 1. endoscope; 10. insertion part; 110. active bending section; 111. snake bone joint; 1111. wire hole; 1112. limiter; 120. passive bending section; 130. first limit structure; 140. second sleeve; 141. spring tube; 150. traction rope; 20. handle; 210. shell; 220. sleeve drive assembly; 2211 second toggle wheel; 2212. second rotating wheel; 2213. third rotating wheel; 2214. transmission member; 222. connecting block; 30. second limit structure; 50. sleeve locking assembly; 510. third toggle wheel; 520. fourth rotating wheel; 530. fixed wheel; 540. protrusion; 550. groove; 60. traction rope drive assembly; 610. first toggle wheel; 620. first rotating wheel. DETAILED DESCRIPTION

[0035] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be described in detail below. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without making any creative work are within the scope of protection of the present invention.

[0036] The terms "first," "second," and the like in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than that illustrated or described herein, and that the objects distinguished by "first," "second," and the like are generally of the same type, and do not limit the number of objects; for example, the first object can be one or more. In addition, the term "and / or" in the specification and claims refers to at least one of the connected objects, and the character " / " generally indicates that the objects connected are in an "or" relationship.

[0037] In each embodiment of the present application, "proximal end" and "distal end" refer to the position of each component relative to the user in the use environment, wherein the end closer to the user is designated as the "proximal end" and the end farther from the user is designated as the "distal end".

[0038] The inventive concept of this application is described here:

[0039] An endoscope is a commonly used medical device used to directly access the body's natural passages, providing doctors with sufficient diagnostic information to treat diseases.

[0040] In the prior art, the bending radius of the active bending section of an endoscope is usually certain. In order to enable the endoscope to move more flexibly in the natural channels of the human body, the smaller the bending radius of the active bending section is, the better. However, in surgeries with larger internal spaces, such as the kidney, due to the larger space within the kidney, the distal end of the active bending section with a small bending radius is difficult to reach the farthest end of the space within the kidney, which is not conducive to the surgeon performing the surgery. The active bending section with a larger bending radius has the problem of poor flexibility when moving in the natural channels of the human body.

[0041] Based on this, the inventors provide an insertion part and an endoscope, and set the insertion part to a structure with an adjustable bending radius of the active bending section. This allows the surgeon to adjust the bending radius of the active bending section according to actual conditions during the operation. When it is necessary to control the insertion part to shuttle through the natural channels of the human body, the bending radius of the active bending section can be set to a small radius. When it is necessary to perform surgery in a scene with a larger internal space, the bending radius of the active bending section can be set to a large radius.

[0042] The following is combined with Figures 1 to 9 , the insertion portion 10 and the endoscope 1 provided in this application are described in detail through specific embodiments and their application scenarios.

[0043] Please also see Figure 1 and Figure 2 An embodiment of the present application provides an endoscope 1, which may include: a handle portion 20 and an insertion portion 10, wherein the insertion portion 10 may be detachably connected to the handle portion 20, wherein the insertion portion 10 may include an active bending section 110, a passive bending section 120, a first limiting structure 130, a second sleeve 140 and a traction rope 150.

[0044] Please refer to the following for details: Figure 2 and Figure 3 In this embodiment, the active bending section 110 may include a plurality of interconnected serpentine segments 111. The present embodiment does not limit the specific number of serpentine segments 111. Each serpentine segment 111 may be provided with a wire hole 1111, which may be used to pass the traction rope 150 and the second sleeve 140 through.

[0045] Please also see Figure 4-Figure 6In a preferred embodiment, the wire-passing hole 1111 is set so that the size of the proximal end is larger than the size of the distal end, so that the traction rope 150 and the second sleeve 140 can be passed through from the proximal snake bone section 111 to the distal snake bone section 111 in sequence. At the same time, the structural setting of the aforementioned wire-passing hole 1111 can also play a guiding role for the second sleeve 140 in the process of passing through the wire-passing hole 1111.

[0046] The distal end of the passive bending section 120 can be connected to the proximal end of the active bending section 110, and the proximal end of the passive bending section 120 can be connected to the handle portion 20. The embodiment of the present application does not limit the specific form and structure of the passive bending section 120. For example, reference can be made to the relevant configurations in the prior art.

[0047] See also Figure 4 The first limiting structure 130 can be connected to the passive bending section 120. In a preferred embodiment, the first limiting structure 130 can be fixedly arranged inside the passive bending section 120, which can help reduce the cross-sectional size of the entire insertion portion 10. The first limiting structure 130 can form a limiting channel. The axial direction of the limiting channel can be the same as the extension direction of the passive bending section 120. The limiting channel can be used for the second sleeve 140 to pass through and for fixing the second sleeve 140 in the radial direction of the second sleeve 140. The embodiment of the present application does not limit the specific structure and form of the limiting channel. For example, in one embodiment, the first limiting structure 130 can be in the form of a pipe. For example, in another embodiment, the first limiting structure 130 can also be in the form of a limiting buckle, for example, a buckle for limiting the movement of the second sleeve 140 in its radial direction is directly stamped on the surface of the passive bending section 120, and the buckle is used as the first limiting structure 130, etc. The specific configuration can be based on actual conditions and is not limited here.

[0048] The second sleeve 140 can be disposed within the limiting passage and can be movably disposed along the axial direction of the limiting passage. The second sleeve 140 can selectively extend into the wire hole 1111. That is, in this embodiment, when the second sleeve 140 extends into the wire hole 1111, the active bending section 110 between the serpentine joint 111 corresponding to the wire hole 1111 and the passive bending section 120 can no longer be pulled and bent by the traction rope 150, thereby changing the bending radius of the active bending section 110. In a preferred embodiment, the deflection of the second sleeve 140 can be greater than the deflection of the first limiting structure 130. For example, in some embodiments, the second sleeve 140 can be configured as a metal tube. This can increase the external force required to bend the second sleeve 140 based on its own deflection, thereby avoiding or reducing the possibility of bending caused by the traction rope 150 in the overlapping area between the second sleeve 140 and the active bending section 110, thereby making the bending radius of the active bending section 110 more controllable.

[0049] Please refer again Figure 3 Furthermore, in one embodiment, one of the serpentine joints 111 may have a limiter 1112, and the limiter 1112 may be used to limit the second sleeve 140 from moving toward the distal end of the active bending section 110. That is, in this embodiment, the setting of the limiter 1112 can make the bending radius of the active bending section 110 within a preset range, thereby preventing the bending radius of the active bending section 110 from being too large. The embodiment of the present application does not limit the specific position of the limiter 1112. For example, in some embodiments, the limiter 1112 may be set on the middlemost serpentine joint 111, etc., and the specific setting may be based on actual conditions. The embodiment of the present application also does not limit the specific form of the limiter 1112. For example, in one embodiment, the limiter 1112 may be a sheet-like structure or a block-like structure, etc., as long as it can prevent the second sleeve 140 from continuing to move toward the distal end of the active bending section 110.

[0050] In addition, in some embodiments, at least a portion of the distal end of the second sleeve 140 can be configured as a spring tube 141. That is, in this embodiment, the distal end of the second sleeve 140 can have a certain buffering effect, and the distal end of the second sleeve 140 can bend along with the bending of the active bending section 110, avoiding hard contact between the distal end of the second sleeve 140 and the serpentine segment 111. This can help reduce or minimize the possibility of damage to the serpentine segment 111, thereby helping to improve the stability and service life of the entire insertion portion 10 during use. At the same time, configuring the distal end of the second sleeve 140 as a spring tube 141 can provide the distal end of the second sleeve 140 with better bending performance, thereby allowing the second sleeve 140 to adapt to the bending of the traction rope 150. This can avoid or reduce the possibility of friction between the traction rope 150 and the inner wall of the second sleeve 140, making it difficult for the operator to pull the traction rope 150, or causing the traction rope 150 to wear and break. The embodiment of the present application does not set the length of the spring tube 141. In a preferred embodiment, the length of the spring tube 141 can be set to be smaller than the length of the snake bone joint 111. This allows the distal end of the second sleeve 140 to have bending properties while avoiding the second sleeve 140 having too many small deflection areas.

[0051] The traction rope 150 can be set in the second sleeve 140 and movably set along the axial direction of the second sleeve 140. The traction rope 150 can be connected to the snake bone joint 111 at the distal end. When the operator pulls the traction rope 150, the active bending section 110 can be driven to bend. At the same time, the bending radius of the active bending section 110 can be changed according to the specific position of the second sleeve 140 extending into the active bending section 110.

[0052] Please also see Figure 7-Figure 9 In this embodiment, the handle portion 20 may include: a shell 210 and a sleeve drive assembly 220. The sleeve drive assembly 220 may be disposed in the shell 210, and the sleeve drive assembly 220 may be connected to the second sleeve 140 and used to drive the second sleeve 140 to selectively extend into the wire hole 1111.

[0053] Specifically, in this embodiment, the cannula drive assembly 220 may include: a drive member and a connecting block 222. The connecting block 222 may be slidably disposed within the housing 210. The two second cannulas 140 may be connected to the connecting block 222. Within the sliding region of the connecting block 222, the second cannulas 140 may extend in the same direction as the sliding direction of the connecting block 222. The drive member may extend out of the housing 210 to facilitate manipulation by the operator. The embodiment of the present application does not limit the specific form of the connecting block 222. For example, in one embodiment, the connecting block 222 may be configured as a plate-like structure, which may help reduce the thickness of the entire connecting block 222, thereby helping to reduce the thickness of the entire handle portion 20.

[0054] In a more specific embodiment, the driving member may include: a second toggle wheel 2211, a second rotating wheel 2212, a third rotating wheel 2213 and a transmission member 2214. The second toggle wheel can be arranged on the outside of the housing 210, and the second toggle wheel can be connected to the second rotating wheel 2212 through a connecting rod. When the operator toggles the second rotating wheel 2212, the second rotating wheel 2212 can be driven to rotate, the second rotating wheel 2212 can be engaged with the third rotating wheel 2213, and the transmission member 2214 can also be engaged with the third rotating wheel 2213. The transmission member 2214 can be connected to the connecting block 222. In this embodiment, the second toggle wheel 2211 can be configured to drive the second rotating wheel 2212 to rotate during the rotation process, and then drive the third rotating wheel 2213 to rotate, and then drive the transmission member 2214 to drive the second sleeve 140, and make the second sleeve 140 move in the axial direction of the limiting channel, so that the second sleeve 140 can selectively extend into the wire hole 1111.

[0055] In a specific embodiment, the transmission member 2214 can be connected to the middle portion of the connecting block 222. The extension direction of the transmission member 2214 can be parallel to the movement direction of the second sleeve 140. The two second sleeves 140 can be symmetrically arranged with respect to the extension direction of the transmission member 2214. In this way, the force exerted by the transmission member 2214 on the connecting block 222 is located in the middle portion of the connecting block 222, thereby enabling the connecting block 222 to synchronously drive the movement of the two second sleeves 140. As previously mentioned, in this embodiment, the second rotating wheel 2212, the transmission member 2214, and the connecting block 222 can all be disposed in the middle portion of the housing. This can position the center of gravity of the entire handle portion 20 closer to the middle portion of the handle portion 20, thereby making the design of the entire handle portion 20 more ergonomic and avoiding or reducing the possibility of localized fatigue in the palm of the operator's hand when attempting to grasp the handle portion 20.

[0056] In addition, in one embodiment, the transmission member 2214 and the second rotating wheel 2212 can be arranged in different planes, that is, in this embodiment, the transmission member 2214 can be spatially offset from the second rotating wheel 2212, so as to avoid the possibility of interference between the second rotating wheel 2212 and the transmission member 2214 during rotation, thereby ensuring that the operator can control the movement process of the second sleeve 140 more accurately.

[0057] Furthermore, in one embodiment, the endoscope 1 may further include: a cannula locking assembly 50, which can be used to selectively lock or unlock the second rotating wheel 2212, so that the operator can easily lock the bending radius of the active bending section 110 after adjusting the bending radius. The embodiment of the present application does not limit the specific form of the cannula locking assembly 50. For example, in one embodiment, the cannula locking assembly 50 may include a third toggle wheel 510, a fourth toggle wheel, and a fixed wheel 530. The third toggle wheel 510 may be disposed on the housing 210 of the housing 210. The third toggle wheel 510 and the fourth toggle wheel may be connected by a connecting rod. The fixed wheel 530 may be located between the second rotating wheel 2212 and the fourth rotating wheel 520, and the fixed wheel 530 may be threadedly engaged with the fourth rotating wheel 520. In this embodiment, the third driving wheel 510 can be configured to drive the fourth rotating wheel 520 to rotate during the rotation process, thereby driving the fixed wheel 530 to abut against the second rotating wheel 2212 to limit the rotation of the second rotating wheel 2212, thereby achieving the effect of locking the second rotating wheel 2212.

[0058] Specifically, in one embodiment, one of the outer periphery of the fixed wheel 530 and the interior of the outer shell 210 can be provided with a protrusion 540, and the other can be provided with a groove 550 that cooperates with the protrusion 540, wherein the depth direction of the groove 550 is the axial direction of the third dial wheel 510. When the operator rotates the third dial wheel 510, the fourth rotating wheel 520 can rotate accordingly, thereby driving the fixed wheel 530 to rise or fall along the depth direction of the groove 550. When the fixed wheel 530 abuts against the second rotating wheel 2212, the second rotating wheel 2212 can be locked.

[0059] Please also see Figure 8 and Figure 9In one embodiment, the endoscope 1 may further include: a second limiting structure 30. The second limiting structure 30 may be disposed within the housing 210. The second limiting structure 30 may have a wire passage, and the traction rope 150 may be passed through the wire passage. The second limiting structure 30 may be used to limit the radial movement of the traction rope 150. The embodiment of the present application does not limit the specific form of the second limiting structure 30. For example, in one embodiment, the second limiting structure 30 may be configured as a block-shaped structure, and the size of the wire passage may be slightly larger than the diameter of the traction rope 150, thereby ensuring that the traction rope 150 can pass through while avoiding or reducing friction between the traction rope 150 and the second limiting structure 30.

[0060] In this embodiment, the second limiting structure 30 is also used to limit the second sleeve 140 from moving in the axial direction away from the active bending section 110. It is understandable that since the traction rope 150 is inserted into the second sleeve 140, if the second limiting structure 30 is not provided, the traction rope 150 will come into contact with the inner wall of the second sleeve 140 and generate friction during the movement of the second sleeve 140 away from the active bending section 110, which is not conducive to the operator pulling the traction rope 150. In other words, when the operator pulls the traction rope 150, different amounts of force will be required to pull the traction rope 150 of the same length, which will interfere with the operator's pulling process of the traction rope 150.

[0061] It should be noted that the embodiments of the present application do not limit the manner in which the second sleeve 140 cooperates with the wire-passing channel. For example, in one embodiment, at least a portion of the proximal end of the second sleeve 140 can extend into the wire-passing channel, and the second sleeve 140 can slide in cooperation with the wire-passing channel. In this embodiment, the second sleeve 140 is located in the wire-passing channel at the position furthest from the active bending section 110. For another example, in another embodiment, the second sleeve 140 is located at the distal end of the second limiting structure 30 at the furthest position from the active bending section 110. In this case, the second sleeve 140 cannot extend into the wire-passing channel. The specific form adopted can be set according to actual conditions.

[0062] In addition, in some embodiments, the endoscope 1 may further include a traction rope drive assembly 60. The traction rope drive assembly 60 may include a first toggle wheel 610 and a first rotating wheel 620. The first toggle wheel 610 may be disposed on the exterior of the housing 210. The first toggle wheel 610 and the first rotating wheel 620 may be connected via a connecting rod. The first rotating wheel 620 may be connected to the traction rope 150. In this embodiment, the first toggle wheel 610 may be configured to rotate the first rotating wheel 620, thereby driving the traction rope 150 to pull the active bending section 110. In a preferred embodiment, the first toggle wheel 610, the second toggle wheel 2211, and the third toggle wheel 510 may be disposed on the same side of the housing 210, thereby facilitating single-handed operation by the operator. Furthermore, the first toggle wheel 610, the second toggle wheel 2211 and the third toggle wheel 510 can also be stacked, which can reduce the distribution length of the first toggle wheel 610, the second toggle wheel 2211 and the third toggle wheel 510 on the surface of the shell 210 along the length direction of the shell 210, and can also facilitate the operator to operate with one hand.

[0063] The insertion portion 10 provided in the embodiment of the present application is provided with a first limiting structure 130 in the passive bending section 120, a limiting channel is formed inside the first limiting structure 130, and a second sleeve 140 is provided in the limiting channel. The second sleeve 140 can be movably provided in the limiting channel along the axial direction of the limiting channel and can selectively extend into the wire hole 1111 of the snake bone section 111 in the active bending section 110. The traction rope 150 is provided in the second sleeve 140 and can move in the axial direction of the second sleeve 140. The traction rope 150 is also connected to the snake bone joint 111 at the distal end. The traction rope 150 can be used to pull the active bending section 110 to bend, and the second sleeve 140 can be used to change the bending radius of the active bending section 110. Therefore, the insertion portion 10 provided in the embodiment of the present application can achieve an adjustable bending radius of the active bending section 110, solving the problem in the prior art that the active bending section 110 of the endoscope 1 has a fixed bending radius, a bending radius that is too small to reach the farthest end of a large empty point, and a bending radius that is too large to move flexibly within the natural channels of the human body. When the above-mentioned insertion portion 10 is applied to the endoscope 1, the above-mentioned problem can also be solved.

[0064] It should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

[0065] Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of the present application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in reverse order depending on the functions involved. For example, the methods described may be performed in an order different from that described, and various steps may be added, omitted, or combined. Furthermore, features described with reference to certain examples may be combined in other examples.

[0066] The above description is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field can easily think of changes or replacements within the technical scope disclosed by the present invention, which should be covered by the scope of protection of the present invention.

Claims

1. An insertion portion, characterized in that: include: An active bending section, the active bending section comprising a plurality of mutually connected snake bone segments, each snake bone segment being provided with a wire hole; a passive bending segment connected to the proximal end of the active bending segment; a first limiting structure, the first limiting structure being connected to the passive bending section, the first limiting structure forming a limiting channel, and the axial direction of the limiting channel being the same as the extending direction of the passive bending section; a second sleeve, the second sleeve being disposed in the limiting channel and movably disposed along the axial direction of the limiting channel, the second sleeve being selectively extendable into the wire-passing hole; and a traction rope, the traction rope being arranged in the second sleeve and being movably arranged along the axial direction of the second sleeve, the traction rope being connected to the snake bone segment at the distal end; One of the serpentine segments between the distal end of the active bending segment and the proximal end of the active bending segment has a limiting member, and the limiting member is used to limit the second sleeve from moving toward the distal end of the active bending segment.

2. The insertion portion according to claim 1, wherein The size of the proximal end of the wire hole is larger than the size of the distal end of the wire hole; and / or, the deflection of the second sleeve is greater than the deflection of the first limiting structure; And / or, at least a portion of the distal end of the second sleeve is a spring tube.

3. The insertion portion according to claim 1, wherein: At least a portion of the distal end of the second sleeve is a spring tube, and the length of the spring tube is smaller than the length of the snake bone segment.

4. An endoscope, characterized in that: include: The handle portion and the insertion portion as described in any one of claims 1 to 3, wherein the handle portion comprises: a shell and a sleeve drive assembly, the sleeve drive assembly is arranged in the shell, the sleeve drive assembly is connected to the second sleeve, and is used to drive the second sleeve to selectively extend into the wire hole.

5. The endoscope according to claim 4, wherein: The sleeve drive assembly includes: a drive member and a connecting block, the connecting block is slidably arranged in the shell, and the two second sleeves are connected to the connecting block. Within the sliding area of the connecting block, the extension direction of the second sleeve is the same as the sliding direction of the connecting block.

6. The endoscope according to claim 5, characterized in that The endoscope further includes: a second limiting structure, which is arranged in the shell, the second limiting structure has a wire passing channel, the traction rope is passed through the wire passing channel, and the second limiting structure is used to limit the radial movement of the traction rope.

7. The endoscope according to claim 5, characterized in that The driving member includes: a second toggle wheel, a second rotating wheel, a third rotating wheel and a transmission member, the second toggle wheel is arranged on the outside of the shell, the second toggle wheel and the second rotating wheel are connected by a connecting rod, the second rotating wheel is engaged with the third rotating wheel, the transmission member is engaged with the third rotating wheel, and the transmission member is connected to the connecting block, the second toggle wheel is configured to drive the second rotating wheel to rotate during the rotation process, and then drive the third rotating wheel to rotate, and then drive the transmission member to drive the second sleeve, and make the second sleeve move in the axial direction of the limiting channel.

8. The endoscope according to claim 7, wherein: The endoscope further includes a cannula locking assembly, which is used to selectively lock or unlock the second rotating wheel.

9. The endoscope according to claim 8, wherein: The sleeve locking assembly includes: a third toggle wheel, a fourth rotating wheel and a fixed wheel, the third toggle wheel is arranged on the outside of the shell, the third toggle wheel and the fourth rotating wheel are connected by a rotating rod, the fixed wheel is located between the second rotating wheel and the fourth rotating wheel and the fixed wheel is threadedly engaged with the fourth rotating wheel, and the third toggle wheel is configured to drive the fourth rotating wheel to rotate during the rotation process, thereby driving the fixed wheel to abut against the second rotating wheel to limit the rotation of the second rotating wheel.

10. The endoscope according to claim 9, characterized in that One of the outer periphery of the fixed wheel and the interior of the housing is provided with a protrusion, and the other is provided with a groove that cooperates with the protrusion, and the depth direction of the groove is the axial direction of the third driving wheel; And / or, the transmission member is connected to the middle part of the connecting block, the extension direction of the transmission member is parallel to the moving direction of the second sleeve, and the two second sleeves are symmetrically arranged with respect to the extension direction of the transmission member; And / or, the transmission member and the second rotating wheel are arranged in different planes; And / or, the endoscope also includes: a traction rope drive assembly, the traction rope drive assembly includes: a first toggle wheel and a first rotating wheel, the first toggle wheel is arranged on the outside of the shell, the first toggle wheel and the first rotating wheel are connected by a connecting rod, the first rotating wheel is connected to the traction rope, the first toggle wheel is configured to drive the first rotating wheel to rotate during rotation and then drive the traction rope to pull the active bending section, the first toggle wheel, the second toggle wheel and the third toggle wheel are arranged on the same side of the shell.

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