An insertion portion and an endoscope

Abstract

The present invention relates to the technical field of endoscopes, and specifically discloses an insertion portion and an endoscope. The insertion portion includes a tube body, a bending portion, and a camera module. The tube body has a first channel that penetrates along its axial direction, and a second channel connected to the first channel is further provided at the distal end of the tube body. The second channel extends at least along the radial direction of the tube body. The camera module is connected to the distal end of the bending portion. During the process of withdrawing the endoscope for observation, the active bending section of the insertion portion can be controlled to bend to achieve the observation of the intestinal lumen. When there are observation blind spots, the bending portion can be retracted so that the camera module is located at the connection of the first channel and the second channel, and then the bending portion is operated to bend so that the camera module extends into the second channel. Based on the bending setting of the second channel relative to the first channel, the camera module located in the second channel can capture image information that cannot be obtained in the first channel, effectively expanding the observation field of the entire endoscope, thereby ensuring the accuracy of diagnosis and treatment.

Description

Technical Field

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

[0002] A digestive endoscope is an opto-mechatronic medical device integrating optical imaging, mechanical transmission, and minimally invasive intervention functions. It includes gastroscopes, colonoscopes, and enteroscopes, etc. It enters the human digestive tract through natural cavities (mouth, anus) to achieve real-time visual diagnosis and intervention. Its core functions include diagnosis, interventional treatment, and tissue sampling.

[0003] In the colonoscope of a digestive endoscope, due to the natural folds of the intestine, the line of sight of the colonoscope may be blocked, making it impossible to directly observe some intestinal mucosa. On the one hand, it increases the complexity of the doctor's operation of the colonoscope, may prolong the examination time, and increases the discomfort of the patient. On the other hand, when the folds are deep or complex, some potential lesions may be missed. Summary of the Invention

[0004] The present invention discloses an insertion part and an endoscope to solve the above-mentioned technical problems existing in the related art.

[0005] To solve the above problems, the present invention adopts the following technical solutions:

[0006] In a first aspect, the present application provides an insertion part, which includes a tube body, a bending part, and a camera module. Among them, the tube body has a first channel penetrating along its axial direction, and a second channel is further provided at the distal end of the tube body. One end of the second channel is connected to the first channel, and the other end of the second channel extends at least along the radial direction of the tube body; the camera module is connected to the distal end of the bending part, and the camera module can be switched between the first channel and the second channel as the bending part bends. When the camera module is located in the second channel, external light is conducted to the camera module through the second channel.

[0007] Further, the insertion part further includes a first light guide member disposed in the first channel. When the camera module is located in the first channel, the camera module is in limit fit with the first light guide member.

[0008] Further, the insertion part further includes a second light guide member disposed in the second channel. When the camera module is located in the second channel, the camera module is in limit fit with the second light guide member.

[0009] Furthermore, the second channel has a limiting section, which extends linearly. When the camera module is located in the second channel, part of the camera module is located in the limiting section, and the outer wall of the camera module fits with the inner wall of the limiting section.

[0010] Furthermore, the second light guide has a reflective surface facing the proximal end of the tube body. When the camera module is located in the second channel, external light is reflected by the reflective surface and then transmitted to the camera module.

[0011] Furthermore, along the radial direction of the tube body, the tube body has a first part and a second part distributed on both sides of the first channel, the second channel is arranged in the second part, and at the connection point between the first channel and the second channel, the thickness of the second part is greater than the thickness of the first part.

[0012] Optionally, the bending portion is pre-bent, and when the bending portion is located at the connecting point of the first channel and the second channel, the bending portion bends toward the second channel to allow the camera module to penetrate into the second channel.

[0013] Optionally, a traction member is connected to the bending portion, and when the bending portion is located at the connecting point of the first channel and the second channel, the traction member is configured to pull the bending portion to bend so that the camera module can be inserted into the second channel.

[0014] Furthermore, the insertion part also includes a catheter, the distal end of which is connected and fixed to the bending part, and the wiring harness connecting the camera module is passed through the catheter.

[0015] In a second aspect, the present application also provides an endoscope, comprising an operating handle and the aforementioned insertion portion, wherein the proximal end of the insertion portion is connected to the operating handle.

[0016] Furthermore, the operating handle includes a shell and a knob rotatably arranged on the shell, a traction wheel connected to the knob is arranged in the shell, and when the bending portion is connected to a traction member, the knob is transmission-connected to the traction member through the traction wheel.

[0017] Furthermore, an adapter is also provided in the operating handle, and when the curved portion is connected to a catheter, the proximal end of the catheter is fixed to the adapter; the adapter has a first rack and a second rack that are arranged opposite to each other, the traction wheel is rotatably provided in the operating handle, and the traction wheel is coaxially connected to a driven gear, the driven gear is arranged adjacent to the first rack and the second rack, a driving gear is provided on the rotating shaft of the knob, and the driving gear is configured to sequentially cooperate with the first rack, the driven gear and one of the second rack when rotating.

[0018] Furthermore, a damping assembly is also provided in the operating handle, and when the camera module is located in the first channel or the second channel, the damping assembly is configured to apply a damping force to the adapter and the driven gear.

[0019] Further, the damping assembly includes a spring and a damping member, wherein the damping member includes an annular base and a plurality of friction parts connected to the outer periphery of the annular base, the plurality of friction parts are distributed along the circumference of the annular base, the spring and the annular base are sleeved on the rotating shaft of the knob, and the annular base is movably arranged along the axial direction of the rotating shaft of the knob.

[0020] Furthermore, two circumferentially extending flanges are provided on the disk surface of the driving gear, and an accommodating gap is formed on the driving gear between the two flanges. When the driving gear is in transmission cooperation with any one of the first rack, the driven gear and the second rack, the friction portion abuts against the flange and is separated from the adapter and the driven gear; when the driving gear is separated from the first rack, the driven gear and the second rack, the friction portion corresponds to the accommodating gap, and the friction portion is in friction contact with the adapter and the driven gear.

[0021] The technical solution adopted by the present invention can achieve the following beneficial effects:

[0022] The insertion portion and endoscope of the present application can control the active bending section of the insertion portion to bend during the process of withdrawing the endoscope for observation, so as to realize observation of the intestinal lumen. When there is a blind spot in observation, the bending portion can be retracted so that the camera module is located at the connection between the first channel and the second channel, and then the bending portion can be bent to allow the camera module to penetrate into the second channel. Based on the bending setting of the second channel relative to the first channel, the camera module located in the second channel can capture image information that it cannot obtain in the first channel, effectively expanding the observation field of the entire endoscope, avoiding the formation of blind spots in observation, and thus ensuring the accuracy of diagnosis and treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0024] Figure 1 is one of the observation schematic diagrams of an existing endoscope in the intestine;

[0025] Figure 2 is another observation schematic diagram of an existing endoscope in the intestine;

[0026] Figure 3 is the structural schematic diagram of the tube body of the embodiment of the present application;

[0027] Figure 4 is Figure 3 the partial enlarged schematic diagram at A in

[0028] Figure 5 is the structural schematic diagram of the insertion part of the embodiment of the present application;

[0029] Figure 6 is Figure 5 the partial enlarged schematic diagram at B in

[0030] Figure 7 is one of the observation schematic diagrams of the insertion part of the embodiment of the present application in the intestine;

[0031] Figure 8 is another observation schematic diagram of the insertion part of the embodiment of the present application in the intestine;

[0032] Figure 9 is the structural schematic diagram of the endoscope of the embodiment of the present application;

[0033] Figure 10 is the structural schematic diagram of the operation handle of the embodiment of the present application;

[0034] Figure 11 is the transmission cooperation schematic diagram of the driving gear, the adapter and the driven gear of the embodiment of the present application.

[0035] In the figure:

[0036] 100, tube body; 101, first part; 102, second part; 110, first channel; 120, second channel; 121, limiting section; 200, bending part; 300, imaging module; 400, first light guide; 500, second light guide; 510, reflecting surface; 600, catheter; 700, operating handle; 710, housing; 720, knob; 730, traction wheel; 740, adapter; 741, first rack; 742, second rack; 750, driven gear; 760, driving gear; 761, flange; 762, accommodating gap; 800, damping assembly; 810, spring; 820, damper; 821, annular base; 822, friction part; 900, traction member; a, intestine; b, colonoscope; c, shadow area. Detailed implementation manners

[0037] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other implementation manners obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0038] The terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of this application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are usually of the same category, and do not limit the number of objects. For example, the first object can be one or multiple. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / ", generally represents an "or" relationship between the associated objects before and after.

[0039] Please refer to Figure 1 and Figure 2 , during the examination of the colonoscope b, the doctor inserts the colonoscope b from the anus into the colon. After reaching the ileocecal part, the doctor gradually withdraws from the intestine a. During the withdrawal of the colonoscope b, the doctor can operate the colonoscope b to actively bend the distal end of its insertion part, so as to observe each part of the intestine a in detail.

[0040] The inventor found during the research process that due to the limited bending amplitude of the insertion part and the natural folds of the intestine a, when the insertion part reaches the maximum bending amplitude, the imaging module at its distal end is also difficult to observe the entire intestinal lumen, especially the part of the intestinal lumen on the proximal side ( Figure 2The shaded area c) still cannot fall within the shooting view of the camera module, that is, an observation dead angle is generated, resulting in the omission of some potential lesions.

[0041] Based on the above situation, the embodiments of the present application disclose an insertion part and an endoscope. The following will be combined with the attached Figures 3 to 11 to describe the insertion part and the endoscope provided by the embodiments of the present application in detail through specific embodiments and their application scenarios.

[0042] Please refer to Figure 3 、 Figure 4 、 Figure 5 and Figure 6 The embodiments of the present application disclose an insertion part. The disclosed insertion part can be applied to an endoscope, especially to a colonoscope in an endoscope. Specifically, the insertion part includes a tube body 100, a bending part 200 and a camera module 300. Among them, the tube body 100 has a first channel 110 that penetrates along its axial direction. A second channel 120 is further provided at the distal end of the tube body 100. One end of the second channel 120 is connected to the first channel 110, and the other end of the second channel 120 extends at least along the radial direction of the tube body 100. It should be noted that in the embodiments of the present application, the second channel 120 extending at least along the radial direction of the tube body 100 means that the second channel 120 can directly extend along the radial direction of the tube body 100, or can extend along the axial direction of the tube body 100 while extending along the radial direction of the tube body 100. In the embodiments of the present application, the second channel 120 can radially penetrate the tube body 100.

[0043] In the embodiments of the present application, please refer to Figure 5 、 Figure 6 、 Figure 7 and Figure 8 The camera module 300 is connected to the distal end of the bending part 200. The bending part 200 can perform a bending action, and the camera module 300 can be switched between the first channel 110 and the second channel 120 as the bending part 200 bends. When the camera module 300 is located in the first channel 110, the camera module 300 can observe the front view of the insertion part, and when the camera module 300 is located in the second channel 120, the camera module 300 can observe the side view of the insertion part.

[0044] Exemplarily, the bending portion 200 can be pre-bent. For example, the bending portion 200 can be a threaded tube made of shape memory alloy, and the bending portion 200 can be in a bent state in its natural state. In the embodiment of the present application, in the initial state, the bending portion 200 is constrained within the first channel 110, and the position where the imaging module 300 is located exceeds the connection between the first channel 110 and the second channel 120. At this time, the bending portion 200 is in the same extended posture as the tube body 100. During the insertion of the insertion portion, the imaging module 300 can observe the front field of view, thereby ensuring the safety of the insertion portion; when the active bending section of the insertion portion is bent to observe the intestinal mucosa, if there are still observation dead angles, the bending portion 200 can be pulled back towards the proximal end of the insertion portion. When the imaging module 300 retreats to the connection between the first channel 110 and the second channel 120, the constraint effect of the first channel 110 on the bending portion 200 disappears, and the bending portion 200 can automatically bend to make the imaging module 300 penetrate into the second channel 120. At this time, the doctor can continue to push the bending portion 200 to make the imaging module 300 reach a specific position within the second channel 120.

[0045] Based on the above technical solutions, when the insertion portion of the embodiment of the present application is specifically applied, during the process of observing while withdrawing the endoscope, the active bending section of the insertion portion can be controlled to bend so that the imaging module 300 can observe a larger field of view. When there are still observation dead angles due to the natural folds of the intestine, the bending portion 200 can be retracted so that the imaging module 300 is at the position where the first channel 110 and the second channel 120 are connected. The bending portion 200 can bend to make the imaging module 300 penetrate into the second channel 120. Based on the lateral bending extension of the second channel 120 relative to the first channel, the imaging module 300 can capture image information in the second channel 120 that it cannot obtain when it is located in the first channel 110. That is to say, by transferring the imaging module 300 from the first channel 110 to the second channel 120, image information with a larger field of view can be obtained, effectively expanding the observation field of the entire endoscope and reducing the risk of omission caused by blind spots.

[0046] It should be noted that in the embodiments of the present application, a traction member is connected to the bending portion 200. When it is necessary to switch the imaging module 300 back from the second channel 120 to the first channel 110, the bending portion 200 can be retracted first to make the imaging module 300 located at the communication portion of the first channel 110 and the second channel 120. Then, the bending portion 200 is pulled by the traction member to cause a reverse bending deformation, and then the bending portion 200 is continuously pushed to make the imaging module 300 reach a specific position in the first channel 110. Moreover, since the bending action of the bending portion 200 in the tube body 100 is a bending within a relatively small range compared to the bending action of the active bending section of the insertion portion, the bending action of the bending portion 200 will not interfere with the bending action of the active bending section.

[0047] Of course, in some other embodiments of the present application, in addition to the prefabricated bending form described above, the bending portion 200 can also be actively bent by manual operation. Exemplarily, a traction member is connected to the bending portion 200, and the traction member can be a traction rope. The proximal end of the traction rope extends to the operation handle of the endoscope. The operator can pull the traction rope to cause the bending portion 200 to bend, so as to switch the imaging module 300 between the first channel 110 and the second channel 120, which will not be elaborated here.

[0048] It can be understood that when the insertion portion penetrates into the human body cavity, the viewing angle range of the imaging module 300 at its distal end is specific. In the embodiments of the present application, by switching the imaging module 300 between the first channel 110 and the second channel 120, that is, changing the orientation of the imaging module 300 relative to the tube body 100, the endoscope can see a wider viewing angle.

[0049] In the embodiments of the present application, please refer to Figure 4 and Figure 6 , the insertion portion further includes a first light guide member 400. The first light guide member 400 is hermetically disposed in the first channel 110. When the imaging module 300 is located in the first channel 110, the imaging module 300 can be in limiting cooperation with the first light guide member 400. Exemplarily, the first light guide member 400 can be a transparent glass sheet. On the one hand, the high transparency of the first light guide member 400 can ensure the smooth passing of the optical fiber, thereby reducing the interference with the image quality. On the other hand, the hermetically disposed first light guide member 400 can effectively prevent the liquid, gas or impurities in the human body cavity from entering the internal channel of the insertion portion, so as to ensure that the bending portion 200 and the imaging module 300 are not contaminated. At the same time, based on the limiting and abutting cooperation between the imaging module 300 and the first light guide member 400, the imaging module 300 can be photographed at a specific position each time, that is, it has a positioning function for the imaging module 300, which helps to reduce problems such as image blurring, jitter or distortion, and improve the shooting quality.

[0050] In a further technical solution, please continue to refer to Figure 4 and Figure 6 , the insertion part may further include a second light guide member 500. The second light guide member 500 may be a transparent glass sheet hermetically disposed in the second channel 120. When the imaging module 300 is located in the second channel 120, the imaging module 300 is in limit fit with the second light guide member 500. External light on the side of the insertion part is transmitted to the imaging module 300 through the second light guide member 500. Similarly, the second light guide member 500 can play a sealing role to prevent liquid, gas or impurities from entering the internal channel of the insertion part, and can also provide a positioning function for the imaging module 300, which will not be elaborated here.

[0051] It should be noted that when the first light guide member 400 is disposed in the first channel 110 and the second light guide member 500 is disposed in the second channel 120, the first light guide member 400 and the second light guide member 500 can work together to completely isolate liquid, gas or impurities in the human body from entering the first channel 110 and the second channel 120. Since the imaging module 300 is movably disposed in the tube body 100 (pushed forward or pulled back), it can effectively prevent the bending part 200 and the imaging module 300 from being contaminated. After the endoscope inspection is completed, the bending part 200 and the imaging module 300 can be withdrawn from the tube body 100 for reuse, reducing the use cost of the endoscope.

[0052] In a further technical solution, please refer to Figure 6 , the second channel 120 has a limiting section 121. The limiting section 121 extends linearly. The inner wall size of the second channel 120 in the limiting section 121 matches the radial size of the imaging module 300. When the bending part 200 bends and the imaging module 300 extends into the second channel 120, a part of the imaging module 300 is located in the limiting section 121, and the outer wall of the imaging module 300 is in contact with the inner wall of the limiting section 121. With such a setting, when the imaging module 300 extends into the second channel 120, the limiting section 121 can prevent the imaging module 300 from radially moving, thereby ensuring the stability of the imaging of the imaging module 300.

[0053] Please refer to Figure 5 、 Figure 6 and Figure 8In a further technical solution, the second light guide 500 has a reflective surface 510 facing the proximal end of the tube body 100, and the reflective surface 510 is preferably facing the deep part of the intestinal cavity on the proximal side. When the camera module 300 is located in the second channel 120, the external light from the side of the insertion part is reflected by the reflective surface 510 and then transmitted to the camera module; under such a setting, through the setting of the reflective surface 510, the camera module 300 can see the image information of the intestinal cavity deep on the proximal side, thereby solving the problem of limited observation area of the camera module 300 due to the limited bending amplitude of the active bending section, especially the problem of limited observation of the proximal side of the intestinal cavity.

[0054] In some embodiments of the present application, the wall thickness of the tube body 100 can be kept consistent along the circumferential direction of the tube body 100 , thereby improving the convenience of manufacturing the tube body 100 and effectively reducing the production cost of the tube body 100 .

[0055] In some other embodiments of the present application, the wall thickness of the tube body 100 may also be different along the circumferential direction of the tube body 100. Specifically, along the radial direction of the tube body 100, the tube body 100 has a first portion 101 and a second portion 102 distributed on both sides of the first channel 110. That is, the first portion 101 and the second portion 102 are radially opposite to each other, and the second channel 120 is provided in the second portion 102. At the position where the first channel 110 and the second channel 120 are connected, the thickness of the second portion 102 is greater than The thickness of the first part 101 is set in this way. When the bending part 200 is bent to allow the camera module 300 to penetrate into the second channel 120, the bending part 200 will generate obvious squeezing force on the tube body 100. Based on the thickening design of the second part 102, the structural strength of the tube body 100 at the connection point between the first channel 110 and the second channel 120 can be increased, thereby preventing the bending part 200 from forcing the tube body 100 to bend and collapse when bending, thereby ensuring the stability of the tube body 100 supporting the bending part 200.

[0056] In a further technical solution, the radial dimension of the first channel 110 at the connection point matches the radial dimension of the curved portion 200. In this way, at the connection point between the first channel 110 and the second channel 120, the tube body 100 can better restrain the curved portion 200, thereby ensuring the stability of the bending action of the curved portion 200 and avoiding the radial random movement of the curved portion 200, which makes it impossible for the camera module 300 to accurately penetrate into the second channel 120.

[0057] In some embodiments of this application, see Figure 5 , Figure 6 and Figure 7, the insertion portion may further include a catheter 600. The distal end of the catheter 600 is fixedly connected to the bending portion 200. Exemplarily, the bending portion 200 in the form of a threaded tube may be embedded in the distal end portion of the catheter 600. The wire connecting the imaging module 300 is threaded through the catheter 600. When a traction member is connected to the bending portion 200, the traction member may also be threaded through the catheter 600 and extend towards the operation handle. It can be understood that when the imaging module 300 switches from the first channel 110 to the second channel 120, the bending portion 200 needs to perform the actions of retracting, bending, and pushing in sequence. Therefore, the catheter 600 is connected to the bending portion 200 and extends proximally to the operation handle, and the pulling force or pushing force can be transmitted to the bending portion 200 through the catheter 600.

[0058] Please refer to Figures 9 to 11 , an endoscope is also disclosed in an embodiment of the present application. The disclosed endoscope includes an operation handle 700 and the aforementioned insertion portion. The proximal end of the insertion portion is connected to the operation handle 700. The operation handle 700 includes a housing 710 and a knob 720 rotatably provided on the housing 710. A traction wheel 730 connected to the knob 720 is provided inside the housing 710. When a traction member is connected to the bending portion 200, the proximal end of the traction member is connected to the traction wheel 730, and the bending of the bending portion 200 can be controlled by rotating the knob 720.

[0059] As can be seen from the foregoing, when the imaging module 300 switches from the first channel 110 to the second channel 120, the bending portion 200 needs to perform the actions of retracting, bending, and pushing in sequence. Based on this situation, a transfer member 740 is further provided inside the operation handle 700. The transfer member 740 is slidably provided inside the housing 710. The proximal end of the catheter 600 connecting the bending portion 200 is fixedly connected to the transfer member 740. The pulling or pushing of the catheter 600 can be realized by the movement of the transfer member 740, and further the backward retraction or forward pushing actions of the bending portion 200 can be realized.

[0060] In an embodiment of the present application, please refer to Figures 10 to 11, the adapter 740 includes a handle, a first rack 741 and a second rack 742. Both the first rack 741 and the second rack 742 are connected to the handle, and the first rack 741 and the second rack 742 are opposite and parallel to each other, so that the adapter 740 has a U-shaped or Y-shaped structure. The catheter 600 connecting the bending part 200 can be fixedly connected to the handle. The traction wheel 730 is rotatably arranged in the housing 710, and a driven gear 750 is coaxially and fixedly connected to the traction wheel 730. When the driven gear 750 is driven to rotate, the traction wheel 730 can be driven to rotate. Specifically, the driven gear 750 is arranged adjacent to the first rack 741 and the second rack 742, preferably at the opening of the adapter 740. A driving gear 760 is arranged on the rotating shaft of the knob 720. The driving gear 760 has circumferentially extending and non-closed tooth patterns. When the operator rotates the knob 720, the driving gear 760 rotates coaxially. The driving gear 760 is configured to be in transmission cooperation with one of the first rack 741, the driven gear 750 and the second rack 742 in turn when rotating.

[0061] Based on this structure, taking the example of switching the imaging module 300 from the first channel 110 to the second channel 120, in the initial state, the driving gear 760 is engaged with the first rack 741. At this time, the imaging module 300 is located in the first channel 110. When the operator rotates the knob 720, the adapter 740 can be first driven to move toward the proximal side of the operating handle 700, so as to drive the bending part 200 and the imaging module 300 to retract in the tube body 100 through the catheter 600. As the knob 720 continues to rotate, the driving gear 760 is separated from the first rack 741 and instead engages with the driven gear 750, thereby driving the traction wheel 730 to rotate, causing the traction member to pull the bending part 200 to bend actively, and the imaging module 300 to penetrate into the second channel 120 as the bending part 200 bends. As the operator continues to rotate the knob 720, the driving gear 760 is separated from the driven gear 750 and instead engages with the second rack 742, thereby driving the adapter 740 to move toward the distal side of the operating handle 700, so that the adapter 740 pushes the bending part 200 and the imaging module 300 forward through the catheter 600 to the in-place position. With such a setting, when performing the operation of switching the imaging module 300 between the first channel 110 and the second channel 120, the three actions of retraction, bending and advancement of the bending part 200 are integrated into one rotation operation of the knob 720. The operator only needs to rotate the knob in the same direction to sequentially complete the three actions of retraction, bending and advancement, reducing the operation complexity while ensuring the operation accuracy. It can be understood that when it is necessary to switch the imaging module 300 from the second channel 120 to the first channel 110, only the knob 720 needs to be rotated in the reverse direction, and the bending part 200 performs the actions of retraction, bending and pushing again to re-enter the first channel 110.

[0062] The endoscope according to the embodiment of the present application further includes a damping assembly 800. The damping assembly 800 is disposed within the operation handle 700 and is configured to apply a damping force to the adapter 740 and the driven gear 750 to prevent the catheter 600 from driving the bending portion 200 and the imaging module 300 to shake randomly during the operation of the endoscope.

[0063] In an alternative embodiment, the damping assembly 800 includes a spring 810 and a damper 820. The damper 820 has an annular structure, and the spring 810 and the damper 820 are sleeved on the rotating shaft of the knob 720. The spring 810 is configured to apply an elastic force to the damper 820 to make the damper 820 in frictional contact with the adapter 740 and the driven gear 750, thereby ensuring the stability of the adapter 740 and the driven gear 750 at the current position and avoiding random shaking of the bending portion 200 and the imaging module 300.

[0064] The inventors found during the research process that if the damper 820 is always in a frictional contact state with the adapter 740 and the driven gear 750, there is a large rotational damping when the operator rotates the knob 720.

[0065] Based on this situation, in some embodiments of the present application, the damper 820 includes an annular base body 821 and a plurality of friction portions 822 connected to the outer side of the annular base body 821. The annular base body 821 is sleeved on the rotating shaft of the knob 720, and the annular base body 821 is movably disposed along the axial direction of the rotating shaft. The plurality of friction portions 822 are distributed along the circumferential direction of the annular base body 821, and the plurality of friction portions 822 can correspond to the adapter 740 and the driven gear 750. Exemplarily, the first rack 741, the driven gear 750, and the second rack 742 can respectively correspond to one friction portion 822.

[0066] In the embodiment of the present application, two flanges 761 are arranged opposite to each other on the toothed disc surface of the driving gear 760, and the flanges 761 are arranged to extend in the circumferential direction, and one of the flanges 761 corresponds to the tooth pattern of the driving gear 760. The flanges 761 have arc-shaped guide surfaces at both ends of the circumferential direction, and there is an accommodation gap 762 between the two flanges 761. When the knob 720 is turned to rotate the driving gear 760, the friction part 822 can switch between the flange 761 and the accommodation gap 762. Specifically, when the driving gear 760 is in transmission cooperation with any one of the first rack 741, the second rack 742 and the driven gear 750, the friction part 822 is supported on the flange 761, and the friction damping generated at this time is small, that is, the operator has the characteristic of smooth rotation. When the operator turns the knob 720 clockwise or counterclockwise to completely disengage the driving gear 760 from the first rack 741, the driven gear 750 and the second rack 742, the friction portion 822 separates circumferentially from the flange 761 and enters the accommodating gap 762. Driven by the spring 810, the damping member 820 moves axially to cause multiple friction portions 822 to frictionally contact with the adapter 740 and the driven gear 750, thereby limiting further shaking of the traction member and the catheter 600, thereby ensuring the stability of the bending portion 200 and the camera module 300 at the distal end of the insertion portion.

[0067] It can be understood that in the embodiment of the present application, the friction force of the damping member 820 when contacting the flange 761 should be smaller than the friction force when the damping member 820 contacts the adapter 740 and the driven gear 750, so that the operator can operate more smoothly in the channel where the camera module 300 is located. After the switching is completed, based on the increase in friction force, the camera module 300 can have good stability in the first channel 110 or the second channel 120.

[0068] In some embodiments of the present application, the portion of the friction portion 822 corresponding to the driving gear 760 can be smoothly set, and the portion of the friction portion 822 that contacts the first rack 741, the second rack 742 and the driven gear 750 is provided with a friction structure. Exemplarily, the friction structure can be a rough anti-slip surface to ensure the stability of the friction contact and avoid relative movement between the two.

[0069] It should be noted that in this text, the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or elements inherent to such a process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the presence of additional identical elements in the process, method, article or device including that element. In addition, it should be pointed out 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 reverse order according to the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, the features described with reference to certain examples may be combined in other examples.

[0070] As described above, the above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention.

Claims

1. An insertion part, characterized in that, It includes a tube body (100), a bending part (200), an imaging module (300) and a second light guide (500); wherein: The tube body (100) has a first channel (110) running through it along its axial direction. A second channel (120) is also provided at the distal end of the tube body (100). One end of the second channel (120) is connected to the first channel (110), and the other end of the second channel (120) extends at least along the radial direction of the tube body (100). The imaging module (300) is connected to the distal end of the bending part (200). The imaging module (300) can be switched between the first channel (110) and the second channel (120) as the bending part (200) bends. The second light guide (500) is arranged in the second channel (120). The second light guide (500) has a reflecting surface (510) facing the proximal end of the tube body (100). When the imaging module (300) is located in the second channel (120), the imaging module (300) is in limit fit with the second light guide (500), and external light is reflected by the reflecting surface (510) and then conducted to the imaging module (300).

2. The insertion part according to claim 1, characterized in that The insertion part further includes a first light guide (400). The first light guide (400) is arranged in the first channel (110). When the imaging module (300) is located in the first channel (110), the imaging module (300) is in limit fit with the first light guide (400).

3. The insertion part according to claim 2, characterized in that, The second channel (120) has a limiting section (121). The limiting section (121) extends linearly. When the imaging module (300) is located in the second channel (120), a part of the imaging module (300) is located in the limiting section (121), and the outer wall of the imaging module (300) fits with the inner wall of the limiting section (121).

4. The insertion part according to claim 2, characterized in that, Along the radial direction of the tube body (100), the tube body (100) has a first part (101) and a second part (102) distributed on both sides of the first channel (110). The second channel (120) is arranged in the second part. At the connection of the first channel (110) and the second channel (120), the thickness of the second part (102) is greater than the thickness of the first part (101).

5. The insertion part according to claim 2, characterized in that, The bending part (200) is pre-bent. When the bending part (200) is located at the connection of the first channel (110) and the second channel (120), the bending part (200) bends towards the second channel (120) so that the imaging module (300) can extend into the second channel (120). Alternatively, a traction member is connected to the bending portion (200). When the bending portion (200) is located at the connection between the first channel (110) and the second channel (120), the traction member is configured to pull the bending portion (200) to bend so that the imaging module (300) extends into the second channel (120).

6. The insertion part according to claim 5, characterized in that, It further includes a catheter (600). The distal end of the catheter (600) is fixedly connected to the bending portion (200), and the wire harness connecting the imaging module (300) is disposed inside the catheter (600).

7. An endoscope, characterized in that, It includes an operating handle (700) and the insertion portion according to any one of claims 1 to 6, and the proximal end of the insertion portion is connected to the operating handle (700). The operating handle (700) includes a housing (710) and a knob (720) rotatably disposed on the housing (710). A traction wheel (730) connected to the knob (720) is disposed inside the housing (710). When a traction member is connected to the bending portion (200), the knob (720) is in transmission connection with the traction member through the traction wheel (730).

8. The endoscope according to claim 7, characterized in that, characterized in that, A transfer member (740) is further disposed inside the operating handle (700). When a catheter (600) is connected to the bending portion (200), the proximal end of the catheter (600) is fixed to the transfer member (740). The transfer member (740) has a first rack (741) and a second rack (742) disposed opposite to each other. The traction wheel (730) is rotatably disposed inside the operating handle (700), and a driven gear (750) is coaxially connected to the traction wheel (730). The driven gear (750) is disposed adjacent to the first rack (741) and the second rack (742). A driving gear (760) is disposed on the rotating shaft of the knob (720), and the driving gear (760) is configured to be in transmission cooperation with one of the first rack (741), the driven gear (750), and the second rack (742) in sequence when rotating.

9. The endoscope according to claim 8, characterized in that, A damping assembly (800) is further disposed inside the operating handle (700). When the imaging module (300) is located inside the first channel (110) or the second channel (120), the damping assembly (800) is configured to apply a damping force to the transfer member (740) and the driven gear (750).

10. The endoscope according to claim 9, characterized in that The damping assembly (800) includes a spring (810) and a damper (820). Among them, the damper (820) includes an annular base body (821) and a plurality of friction portions (822) connected to the outer periphery of the annular base body (821). The plurality of friction portions (822) are distributed along the circumferential direction of the annular base body (821). The spring (810) and the annular base body (821) are sleeved on the rotating shaft of the knob (720), and the annular base body (821) is movably disposed along the axial direction of the rotating shaft of the knob (720). Two circumferentially extending flanges (761) are provided on the disk surface of the drive gear (760), and a receiving gap (762) is formed between the two flanges (761) of the drive gear (760). When the drive gear (760) is in transmission cooperation with any one of the first rack (741), the driven gear (750), and the second rack (742), the friction portion (822) abuts against the flange (761) and separates from the adapter (740) and the driven gear (750); when the drive gear (760) is separated from the first rack (741), the driven gear (750), and the second rack (742), the friction portion (822) corresponds to the receiving gap (762), and the friction portion (822) is in frictional contact with the adapter (740) and the driven gear (750).

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