Insertion portion and endoscope

Abstract

The present invention relates to the technical field of endoscopes, and specifically discloses an insertion portion and an endoscope, wherein the insertion portion comprises an active bending section, a passive bending section, a traction member, a first sleeve and a second sleeve, wherein the active bending section is connected to the distal end of the passive bending section, the active bending section comprises a plurality of snake bone units, the distal end of the traction member is connected to the distalmost snake bone unit, the distal end of the first sleeve is connected to the passive bending section, and the second sleeve is movably sleeved on the traction member; when performing surgery in a narrow space, the traction member can be pulled to bend the active bending section while the second sleeve is moved backward, so that the portion of the distal end of the active bending section exposed to the second sleeve can be bent at a small angle from far to near with the end of the second sleeve as a fulcrum; when performing surgery in a larger space, the second sleeve can be moved to be completely separated from the active bending section, so that when the traction member is pulled, the active bending section can sweep over a larger area and accurately reach the target position.

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 medical device that inserts an insertion part into the human body and observes the internal tissues of the human body through a camera module at the far end of the insertion part. It can help doctors determine the location of lesions in the patient's body and the tissue structural characteristics of the lesion location.

[0003] The endoscope includes an operating handle and an insertion part. In actual operation, the first wheel is driven to rotate by toggling the lever on the operating handle to adjust the posture of the active bending section of the insertion part, thereby adjusting the direction of the distal module and realizing functions such as fixed-point observation.

[0004] However, the inventors discovered that when the active bending segment at the distal end of the insertion portion is bent, its proximal end bends before the distal end. This bending method causes the distal end of the active bending segment to sweep a larger area during the bending process. When the doctor uses it during the operation, if it is necessary to bend the active bending segment to the subrenal calyx end, the operation is more difficult. If the active bending segment is improved to a bending method in which the distal end bends before the proximal end, the bending radius of the active bending segment will be smaller. In a larger surgical space, since there is not enough surrounding tissue to form a stable support for the insertion portion, the insertion portion may lack external constraints, causing the active bending segment of the insertion portion to easily over-bend and fail to accurately reach the target position. Summary of the Invention

[0005] The present invention discloses an insertion portion and an endoscope to solve the above technical problems existing in the related art.

[0006] In order to solve the above problems, the present invention adopts the following technical solutions:

[0007] In a first aspect, the present application provides an insertion portion, which includes an active bending section, a passive bending section, a traction member, a first sleeve and a second sleeve, wherein the active bending section is connected to the distal end of the passive bending section, the active bending section includes a plurality of snake bone units connected end to end, the distal end of the traction member is connected to the farthest snake bone unit, the distal end of the first sleeve is connected to the passive bending section, and the second sleeve is movably sleeved on the traction member.

[0008] In the second aspect, the present application also provides an endoscope, comprising an operating handle and the aforementioned insertion part, the proximal end of the insertion part being connected to the operating handle, a first traction mechanism and a second traction mechanism being provided in the operating handle, the proximal end of the traction member being connected to the first traction mechanism, the proximal end of the second sleeve being connected to the second traction mechanism, the first traction mechanism being connected to the second traction mechanism, so that the traction member and the second sleeve move synchronously.

[0009] The technical solution adopted by the present invention can achieve the following beneficial effects:

[0010] In the insertion portion and endoscope of the present application, in the initial state, the distal end of the second sleeve extends to the distal end of the active bending section. Due to the restraining effect of the second sleeve, the bending damping of the entire active bending section is relatively large. When the distal end of the insertion portion is performing a surgical operation in a narrow space, the second sleeve can be moved backward while pulling the active bending section to cause bending, so that the active bending section has a first part exposed to the second sleeve and a second part hidden in the second sleeve. Since the second sleeve releases the restraining effect on the first part, the bending damping of the first part is smaller than the bending damping of the second part. When the traction member is pulled, the first part can bend preferentially with the distal end of the second sleeve as a fulcrum. Based on the continuous backward movement of the second sleeve, the entire active bending section bends at a small angle from far to near, thereby avoiding the risk of the proximal end of the active bending section preferentially bending, which has a large overall sweeping area and is prone to causing mucosal scraping or impact on the inner wall of the cavity in a narrow space.

[0011] When the distal end of the insertion portion is performing a surgical operation in a larger space, the second sleeve can be moved backward to completely separate the second sleeve from the active bending section axially. In this way, when the traction member is pulled, the entire active bending section uses the distal end of the passive bending section as a fulcrum to bend at a large angle from near to far. The preferential bending of the proximal end of the active bending section can drive the adjustment of the direction of the entire active bending section, sweeping a larger area, allowing the operator to more easily reach the target position with the camera module at the distal end of the active bending section, thereby improving the efficiency and success rate of the operation.

[0012] At the same time, by moving the second sleeve to change its relative position relationship with the active bending section, the length of the first part and the second part can be adjusted. Therefore, the operator can adaptively adjust the position of the second sleeve according to the size of the working space where the insertion part is located, so that the length of the first part matches the size of the working space. This can avoid the problem of a large swept area and easy scraping of the inner wall caused by the preferential bending of the proximal end of the active bending section, and can also avoid the problem of a small bending radius caused by the preferential bending of the distal end of the active bending section, which has no stable support in a larger surgical space and cannot accurately reach the target position. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] 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.

[0014] Figure 1 is a schematic structural diagram of the insertion portion of an embodiment of the present application;

[0015] Figure 2 yes Figure 1 A partial enlarged schematic diagram of point A in the middle;

[0016] Figure 3 yes Figure 1 A partial enlarged schematic diagram of point B in the middle;

[0017] Figure 4 is a schematic structural diagram of an endoscope according to an embodiment of the present application;

[0018] Figure 5 This is a schematic diagram of the internal structure of the operating handle of an embodiment of the present application;

[0019] Figure 6 This is a schematic diagram of the connection between the first traction mechanism and the second traction mechanism in an embodiment of the present application;

[0020] Figure 7 This is one of the transmission coordination diagrams of the second wheel disc, the first gear, the second gear and the rack in an embodiment of the present application;

[0021] Figure 8 This is the second schematic diagram of the transmission coordination of the second wheel disc, the first gear, the second gear and the rack in the embodiment of the present application;

[0022] Figure 9 It is a schematic assembly diagram of the first traction mechanism and the second traction mechanism of an embodiment of the present application.

[0023] In the picture:

[0024] 100. Insertion portion; 110. Active bending section; 111. Snake bone unit; 120. Passive bending section; 130. Pulling member; 140. First sleeve; 150. Second sleeve; 200. Operating handle; 210. First traction mechanism; 211. First wheel; 212. First knob; 213. First shaft; 220. Second traction mechanism; 221. Second wheel; 2211. First tooth pattern; 2212. Second tooth pattern; 222. First gear; 2221. First ring gear; 2222. Second ring gear; 223. Second gear; 2231. Third ring gear; 2232. Fourth ring gear; 224. Rack; 225. Second knob; 226. Second shaft; 230. Elastic mechanism; 240. Locking assembly; 241. Third knob; 242. Third shaft. DETAILED DESCRIPTION

[0025] To make the objectives, technical solutions, and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other implementations obtained by those of ordinary skill in the art without inventive effort are within the scope of protection of the present invention.

[0026] 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.

[0027] The following is combined with Figures 1 to 9 , the insertion part and endoscope provided in the embodiments of the present application are described in detail through specific embodiments and their application scenarios.

[0028] See Figure 1 、 Figure 2 、 Figure 3 and Figure 4The embodiment of the present application discloses an insertion portion 100, which is applied to an endoscope. Specifically, the disclosed insertion portion 100 includes an active bending section 110, a passive bending section 120, a traction member 130, a first sleeve 140 and a second sleeve 150, wherein the active bending section 110 is connected to the distal end of the passive bending section 120. For example, the active bending section 110 can be formed by hingedly connecting multiple snake bone units 111 connected end to end, and the passive bending section 120 can be a multi-layer tubular structure. For example, Specifically, the passive bending segment 120 may include a braided mesh tube, a spiral tube and an outer covering distributed from the inside to the outside. The distal end of the traction member 130 is connected to the snake bone unit 111 at the farthest end of the active bending segment 110. For example, the traction member 130 may be a metal traction rope, which may be connected to the snake bone unit 111 by welding. The proximal end of the traction member 130 is connected to the operating handle 200 of the endoscope. By operating the operating handle 200, the traction member 130 can be pulled, thereby causing the active bending segment 110 to bend.

[0029] In the embodiment of the present application, the distal end of the first sleeve 140 is connected to the passive bending section 120. For example, the distal end of the first sleeve 140 is located at the junction of the active bending section 110 and the passive bending section 120, and the first sleeve 140 can be fixed to the inner wall of the passive bending section 120. The second sleeve 150 is movably sleeved on the traction member 130, and the traction member 130 and the second sleeve 150 are jointly arranged in the first sleeve 140. On the one hand, the first sleeve 140 can movably sleeve the traction member 130 and the second sleeve 150. The second sleeve 150 plays a certain protective role, reducing the friction between the traction member 130 and the second sleeve 150 and the inner wall of the passive bending section 120 or other components. On the other hand, the first sleeve 140 can restrain and position the traction member 130 and the second sleeve 150. This restraint and positioning effect limits the radial movement of the traction member 130 and the second sleeve 150, avoiding bending and wrinkling of the traction member 130 during the pulling process and the second sleeve 150 during the movement process.

[0030] Based on the above technical solution, when the insertion part of the embodiment of the present application is used in a specific application, in the initial state, the distal end of the second sleeve 150 extends to the distal end of the active bending section 110. Based on the restraining effect of the second sleeve 150, the bending damping experienced by the entire active bending section 110 is relatively large. When the distal end of the insertion portion 100 is performing a surgical operation in a narrow space, the second sleeve 150 can be moved backward while the active bending section 110 is pulled to bend, so that the active bending section 110 has a first part exposed from the second sleeve 150 and a second part hidden in the second sleeve 150. Since the second sleeve 150 releases the constraint on the first part, the bending damping of the first part is smaller than the bending damping of the second part. When the traction member 130 is pulled, the first part can bend preferentially with the distal end of the second sleeve 150 as a fulcrum. Based on the continuous backward movement of the second sleeve 150 and the continuous pulling action on the traction member 130, the entire active bending section 110 bends at a small angle from far to near, thereby avoiding the risk of the proximal end of the active bending section 110 preferentially bending, which has a large overall sweeping area and is prone to causing mucosal scraping or impact on the inner wall of the cavity in a narrow space.

[0031] When the distal end of the insertion portion 100 is performing a surgical operation in a larger space, the second sleeve 150 can be moved backward to completely separate the second sleeve 150 from the active bending section 110 axially. In this way, when the traction member 130 is pulled, the entire active bending section 110 is bent at a large angle from near to far with the distal end of the passive bending section 120 as a fulcrum. The preferential bending of the proximal end of the active bending section 110 can drive the adjustment of the direction of the entire active bending section 110. The active bending section 110 sweeps a larger area when bending, so that the operator can make the camera module at the distal end of the active bending section 110 reach the target position more easily, thereby improving the efficiency and success rate of the operation.

[0032] It should be noted that if the first part includes at least two snake bone units 111, when the traction member 130 is pulled, the snake bone unit 111 located on the distal side can bend preferentially with the snake bone unit 111 on the proximal side as a fulcrum, that is, the first part itself also bends from near to far. Based on this situation, in an embodiment of the present application, the lengths of the first part and the second part can be adjusted by moving the second sleeve 150 to change its relative position relationship with the active bending section 110. Therefore, the operator can adaptively adjust the position of the second sleeve 150 according to the size of the working space in which the insertion part 100 is located, so that the length of the first part matches the size of the working space. This can avoid the problem of a large swept area and easy scraping of the inner wall caused by the preferential bending of the proximal end of the active bending section 110, and can also avoid the problem of a small bending radius caused by the preferential bending of the distal end of the active bending section 110, and the inability to accurately reach the target position due to lack of stable support in a larger surgical space. It is understandable that in the embodiment of the present application, the moving distance of the second sleeve 150 should be greater than the moving distance of the traction member 130 so that the second sleeve 150 will not interfere with the bent snake bone unit 111 after movement.

[0033] See Figure 4 The embodiment of the present application further discloses an endoscope, which includes an operating handle 200 and the aforementioned insertion portion 100 , wherein the proximal end of the insertion portion 100 is connected to the operating handle 200 .

[0034] As can be seen from the above, when the insertion portion 100 enters the human body cavity to perform a surgical operation, it is necessary to pull the traction member 130 to bend the active bending section 110, and to move the second sleeve 150 backward or forward to adjust its relative position relationship with the active bending section 110. Based on this situation, please refer to Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 and Figure 9 A first traction mechanism 210 and a second traction mechanism 220 are provided in the operating handle 200 , wherein the proximal end of the traction member 130 is connected to the first traction mechanism 210 , and the proximal end of the second sleeve 150 is connected to the second traction mechanism 220 .

[0035] Exemplarily, the first traction mechanism 210 includes a first wheel 211, the proximal end of the traction member 130 is connected and fixed to the first wheel 211, and the operating handle 200 is provided with a first knob 212 that is transmission-connected to the first wheel 211. Exemplarily, the first knob 212 is coaxially connected to the first wheel 211 through a first shaft 213, and the bending action of the active bending section 110 can be achieved by rotating the first knob 212.

[0036] For example, see Figure 6 、 Figure 7 、 Figure 8 and Figure 9 The second traction mechanism 220 may include a second wheel disc 221 and a rack 224 that is in transmission cooperation with the second wheel disc 221. The second wheel disc 221 is rotatably arranged in the operating handle 200, and the rack 224 is slidably fitted in the operating handle 200. The proximal end of the second sleeve 150 can be connected and fixed to the rack 224. The operating handle 200 is provided with a second knob 225 that is in transmission connection with the second wheel disc 221. For example, the second knob 225 can be coaxially connected to the second wheel disc 221 through a second shaft 226. By rotating the second knob 225, the second wheel disc 221 can be driven to rotate, and then the rack 224 can be made to slide in the operating handle 200, thereby achieving pulling the second sleeve 150 backward or pushing it forward.

[0037] In the embodiment of the present application, the first traction mechanism 210 can be connected to the second traction mechanism 220. Based on the connection relationship between the two, it is only necessary to rotate the first knob 212 or the second knob 225 on the operating handle 200 to achieve the synchronous action of the traction member 130 and the second sleeve 150. That is to say, during the continuous retraction of the second sleeve 150, the part of the active bending section 110 exposed outside the second sleeve 150 continues to bend, thereby ensuring that the active bending section 110 bends from far to near while reducing the operating difficulty of the operator.

[0038] In some embodiments of the present application, the operating handle 200 is further provided with an elastic mechanism 230, which is configured to apply an elastic force to one of the first wheel disc 211 or the second wheel disc 221, so that the first wheel disc 211 and the second wheel disc 221 are tightly coupled to transmit torque. In this way, when any one of the first knob 212 and the second knob 225 is rotated, the active bending section 110 bends and the second sleeve 150 is pulled backward.

[0039] During the research process, the inventor discovered that if the second wheel disc 221 and the first wheel disc 211 are rotated synchronously in the same direction, for the active bending section 110, the different rotation directions of the first wheel disc 211 will cause the active bending section 110 to bend toward its first side or second side, but for the synchronously rotating second wheel disc 221, the different rotation directions will switch between pushing the second sleeve 150 forward and pulling the second sleeve 150 backward. Therefore, how to achieve the active bending section 110 bending toward its first side or second side while the second sleeve 150 is pulled backward is the key to the synchronous action of the traction member 130 and the second sleeve 150.

[0040] Based on the above problems, in some embodiments of the present application, the second traction mechanism 220 also includes a first gear 222 and a second gear 223, wherein the first gear 222 and the second gear 223 are both rotatably arranged in the operating handle 200, and the rack 224 is slidably arranged in the operating handle 200, the first gear 222 and the second gear 223 are meshed with each other, the second gear 223 is meshed with the rack 224, and the proximal end of the second sleeve 150 is connected and fixed to the rack 224.

[0041] A first tooth pattern 2211 and a second tooth pattern 2212 are provided on the outer edge of the second wheel disc 221. The first tooth pattern 2211 and the second tooth pattern 2212 are staggered along the axial direction of the second wheel disc 221, and the first tooth pattern 2211 and the second tooth pattern 2212 are connected in the circumferential direction of the second wheel disc 221. The first tooth pattern 2211 is configured to engage with the second gear 223 correspondingly when the second wheel disc 221 rotates and to be separated from and not in contact with the first gear 222. The second tooth pattern 2212 is configured to engage with the first gear 222 correspondingly when the second wheel disc 221 rotates and to be separated from and not in contact with the second gear 223.

[0042] Under such a setting, in the initial state, the first gear 222 is located between the first tooth pattern 2211 and the second tooth pattern 2212. When the operator rotates the first knob 212 or the second knob 225 in the first direction, for example, the first direction can be Figure 1 In the counterclockwise direction, the active bending section 110 is bent toward the first side, and the first tooth pattern 2211 is directly engaged with the second gear 223 to rotate the second gear 223 clockwise. At this time, the first gear 222 engaged with the second gear 223 is in an idling state, and the rack 224 engaged with the second gear 223 moves toward the proximal side of the operating handle 200, thereby pulling the second sleeve 150 toward the proximal end. That is to say, when the first knob 212 or the second knob 225 is rotated in the first direction, the bending action of the active bending section 110 toward the first side and the retracting action of the second sleeve 150 are performed synchronously. During this process, the snake bone unit 111 that is first exposed outside the second sleeve 150 first bends relative to the snake bone unit 111 located at its proximal end, so as to realize the bending action of the entire active bending section 110 from far to near. It can be understood that when the first knob 212 or the second knob 225 is rotated clockwise, the distal end of the insertion portion 100 can return to its initial state, and the second sleeve 150 can be pushed forward and sleeved on the portion of the traction member 130 corresponding to the active bending section 110.

[0043] When the first gear 222 is located between the first tooth pattern 2211 and the second tooth pattern 2212, the operator rotates the first knob 212 or the second knob 225 in the second direction. For example, the second direction may be Figure 1The second gear 223 is engaged with the first gear 222, and the rack 224 is engaged with the second gear 223, and moves toward the proximal end of the operating handle 200, thereby pulling the second sleeve 150 toward the proximal end. That is, based on the transmission cooperation relationship between the second wheel disc 221, the first gear 222 and the second gear 223, the second sleeve 150 can achieve a synchronous retraction action when the active bending section 110 bends toward the first side or the second side. This design method in which the first traction mechanism 210 and the second traction mechanism 220 are connected to enable the active bending section 110 and the second sleeve 150 to move synchronously greatly simplifies the integration difficulty of the components of the operating handle 200 and reduces the operation difficulty of the operator.

[0044] In the embodiment of the present application, the first gear 222 has a first gear ring 2221 and a second gear ring 2222 arranged at intervals, the first gear ring 2221 is used to engage with the second tooth pattern 2212, and the second gear ring 2222 is used to engage with the second gear 223; similarly, the second gear 223 has a third gear ring 2231 and a fourth gear ring 2232 arranged at intervals, the third gear ring 2231 is used to engage with the first tooth pattern 2211, and the fourth gear ring 2232 is used to engage with the first gear 222.

[0045] As can be seen from the foregoing, by moving the second sleeve 150 to change its relative positional relationship with the active bending section 110, the length of the first portion and the second portion can be adjusted, thereby allowing the insertion portion 100 to adapt to surgical spaces of different sizes. Based on this situation, the first traction mechanism 210 and the second traction mechanism 220 in the embodiment of the present application are preferably connected in a clutchable manner. In this way, when the first traction mechanism 210 and the second traction mechanism 220 are engaged, the operator can turn the first knob 212 or the second knob 225 to synchronize the active bending section 110 and the second sleeve 150. When the first traction mechanism 210 and the second traction mechanism 220 are separated, the operator can adjust the position of the second sleeve 150 relative to the active bending section 110 through the second traction mechanism 220 alone, so that the distribution of the first portion and the second portion can adapt to the surgical space.

[0046] Specifically, see Figure 6 and Figure 9The first shaft 213 and the second shaft 226 can be coaxially arranged so that the first wheel disc 211 and the second wheel disc 221 are coaxially distributed. Specifically, the first shaft 213 can be a hollow structure, and the second shaft 226 is axially passed through the first shaft 213 and fixedly connected to the second wheel disc 221. The elastic mechanism 230 may include a spring, which is located on the side of the second wheel disc 221 facing away from the first wheel disc 211. One end of the spring is against the inner wall of the operating handle 200, and the other end of the spring is against the second wheel disc 221. In this way, in the initial state, the spring applies an elastic force to the second wheel disc 221, so that the second wheel disc 221 is tightly combined with the first wheel disc 211. In this way, when the first knob 212 or the second knob 225 is rotated, the second wheel disc 221 and the first wheel disc 211 can transmit torque to each other. When it is necessary to separate the first wheel disc 211 and the second wheel disc 221 from each other, the second wheel disc 221 is axially separated from the first wheel disc 211 by pressing the second knob 225. At this time, the operator can operate the second knob 225 alone to adjust the position of the second sleeve 150 relative to the active bending section 110 so that the first portion exposed outside the second sleeve 150 is adapted to the current size of the surgical space.

[0047] It should be noted that, in the embodiments of this application, see Figure 6 and Figure 8 The third gear ring 2231 of the second gear 223 can be two axially distributed ones, one of the third gear rings 2231 is meshed with the first tooth pattern 2211 of the second wheel disc 221 in the engaged state, and the other third gear ring 2231 is meshed with the first tooth pattern 2211 of the second wheel disc 221 in the separated state. In this way, when the second knob 225 is pressed to move the second wheel disc 221 axially and separate from the first wheel disc 211, the second wheel disc 221 can still drive the second sleeve 150 to move through the first gear 222, the second gear 223 and the rack 224.

[0048] In a further technical solution, a first friction structure is provided on the side of the first wheel disc 211 facing the second wheel disc 221, and a second friction structure is provided on the side of the second wheel disc 221 facing the first wheel disc 211. When the first traction mechanism 210 is combined with the second traction mechanism 220, the first friction structure and the second friction structure are in frictional contact to transmit torque, thereby avoiding slippage between the first wheel disc 211 and the second wheel disc 221 and affecting the synchronous movement of the two, resulting in excessive bending damping of the active bending section 110 (rotation lag of the second wheel disc 221) or a large area swept by the active bending section 110 (rotation lag of the first wheel disc 211).

[0049] In an optional embodiment, the first friction structure may be a third tooth pattern provided on the surface of the first wheel disc 211, extending from the center of the first wheel disc 211 to the edge of the first wheel disc 211, with multiple third tooth patterns densely distributed along the circumference of the first wheel disc 211. The second friction structure may be a fourth tooth pattern provided on the surface of the second wheel disc 221, extending from the center of the second wheel disc 221 to the edge of the second wheel disc 221, with multiple fourth tooth patterns densely distributed along the circumference of the second wheel disc 221. With this arrangement, when the spring applies an axial compressive force, the engagement of the third and fourth tooth patterns between the first and second wheel discs 211, 221 increases the circumferential friction between the two. This allows one of the first and second wheel discs 211, 221, to rotate synchronously with the other when driven, thus preventing slippage.

[0050] In another optional embodiment, the first friction structure may be a damping plate or a spike structure provided on the first wheel disc 211, and the second friction structure may be a spike structure or a damping plate provided on the second wheel disc 221. The damping plate and the spike structure are correspondingly provided on the first wheel disc 211 and the second wheel disc 221. For example, the damping plate may be a structural member made of polyurethane material, nitrile rubber or fluororubber. Under the elastic force of the elastic mechanism 230, the spikes are tightly pressed against the damping plate, so that the first wheel disc 211 and the second wheel disc 221 can transmit torque and rotate synchronously.

[0051] In the embodiment of the present application, the operating handle 200 is further provided with a locking assembly 240, which is used to lock the first traction mechanism 210 and the second traction mechanism 220. Figure 1 、 Figure 4 and Figure 9 After operating the first knob 212 or the second knob 225 to bend the active bending section 110 to the adapted position in the surgical space, the current posture of the active bending section 110 can be locked by the locking assembly 240 to prevent the active bending section 110 from shaking at will and affecting the surgical operation. The locking assembly 240 includes a third knob 241 and a third shaft 242 connected to the third knob 241. The third knob 241 is coaxially arranged with the first knob 212 and the second knob 225. The first knob 212, the second knob 225 and the third knob 241 are coaxially arranged with the first knob 212, the second knob 225 and the third knob 241. 41 are arranged from the inside to the outside, the second shaft 226 is a hollow structure, the third shaft 242 is movably arranged in the second shaft 226, and the third shaft 242 is provided with a threaded section at one end facing away from the third knob 241, and the threaded section is used to threadably cooperate with the threaded hole in the operating handle 200. During specific operation, when the active bending section 110 is bent to reach a suitable position, the third knob 241 can be rotated to press the second knob 225 and the first knob 212, thereby achieving locking of the first traction mechanism 210 and the second traction mechanism 220.

[0052] It should be noted that, in this article, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In addition, it should be noted that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the opposite order according to the functions involved. For example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0053] 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 endoscope, characterized in that: It comprises an operating handle (200) and an insertion portion, wherein the proximal end of the insertion portion is connected to the operating handle (200); wherein: The insertion portion includes an active bending section (110), a passive bending section (120), a traction member (130), a first sleeve (140) and a second sleeve (150), wherein the active bending section (110) is connected to the distal end of the passive bending section (120), the active bending section (110) includes a plurality of snake bone units (111) connected end to end, the distal end of the traction member (130) is connected to the distal end of the snake bone unit (111), the distal end of the first sleeve (140) is connected to the passive bending section (120), and the second sleeve (150) is movably sleeved on the traction member (130), and the length of the second sleeve (150) in the active bending section (110) can be adjusted by pulling the second sleeve (150) backward or pushing the second sleeve (150) forward; A first traction mechanism (210) and a second traction mechanism (220) are provided in the operating handle (200); the proximal end of the traction member (130) is connected to the first traction mechanism (210), and the proximal end of the second sleeve (150) is connected to the second traction mechanism (220); the first traction mechanism (210) and the second traction mechanism (220) are connected in a clutched manner; when the first traction mechanism (210) and the second traction mechanism (220) are connected, the traction member (130) can move synchronously with the second sleeve (150); The first traction mechanism (210) comprises a first wheel disc (211), and the proximal end of the traction member (130) is connected to the first wheel disc (211); The second traction mechanism (220) includes a second wheel (221), a first gear (222), a second gear (223) and a rack (224); the first gear (222) is meshed with the second gear (223); the second gear (223) is meshed with the rack (224); the first gear (222) is meshed with the rack (224); the proximal end of the second sleeve (150) is connected and fixed to the rack (224); A first tooth pattern (2211) and a second tooth pattern (2212) connected in a circumferential direction are provided on the outer edge of the second wheel disc (221), and the first tooth pattern (2211) and the second tooth pattern (2212) are staggered along the axial direction of the second wheel disc (221), the first tooth pattern (2211) is configured to mesh with the second gear (223) when the second wheel disc (221) rotates, and the second tooth pattern (2212) is configured to mesh with the first gear (222) when the second wheel disc (221) rotates, so that the rack (224) pulls the second sleeve (150) to move toward the proximal end of the insertion portion; The first gear (222) has a first gear ring (2221) and a second gear ring (2222) arranged at intervals, the first gear ring (2221) is used to mesh with the second tooth pattern (2212), and the second gear ring (2222) is used to mesh with the second gear (223); and / or the second gear (223) has a third gear ring (2231) and a fourth gear ring (2232) arranged at intervals, the third gear ring (2231) is used to mesh with the first tooth pattern (2211), and the fourth gear ring (2232) is used to mesh with the first gear (222); The first wheel disc (211) and the second wheel disc (221) are coaxially arranged. An elastic mechanism (230) is further arranged in the operating handle (200). The second wheel disc (221) is fixedly arranged in its axial direction, and the first wheel disc (211) is movably arranged in its axial direction. The elastic mechanism (230) is configured to apply an elastic force to the first wheel disc (211) so that the first wheel disc (211) and the second wheel disc (221) are tightly engaged.

2. The endoscope according to claim 1, wherein A first friction structure is provided on the side of the first wheel disc (211) facing the second wheel disc (221), and a second friction structure is provided on the side of the second wheel disc (221) facing the first wheel disc (211). When the first traction mechanism (210) and the second traction mechanism (220) are engaged, the first friction structure and the second friction structure are in frictional contact to transmit torque.

3. The endoscope according to claim 1, wherein The second sleeve (150) is a threaded tube.

4. The endoscope according to claim 1, wherein: The operating handle (200) is further provided with a locking assembly (240), and the locking assembly (240) is used to lock the first traction mechanism (210) and the second traction mechanism (220).

5. The endoscope according to claim 4, characterized in that The first traction mechanism (210) further comprises a first knob (212) and a first shaft (213), wherein the first knob (212) is connected and fixed to the first wheel disc (211) via the first shaft (213); The second traction mechanism (220) further includes a second knob (225) and a second shaft (226), wherein the second knob (225) is connected and fixed to the second wheel disc (221) via the second shaft (226), the first shaft (213) is a hollow structure, and the second shaft (226) is coaxially arranged inside the first shaft (213); The locking assembly (240) includes a third knob (241) and a third shaft (242) connected to the third knob (241); the second shaft (226) is a hollow structure; the third shaft (242) is inserted into the second shaft (226); and the third shaft (242) is threadedly engaged with the inner wall of the operating handle (200).

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