Insertion part and endoscope

Abstract

The invention relates to the technical field of endoscopes, and particularly discloses an insertion part and an endoscope, the insertion part comprises a tube body, a bent part and a camera module, the tube body is provided with a first channel penetrating in the axial direction of the tube body, the far end of the tube body is further provided with a second channel communicated with the first channel, the second channel at least extends in the radial direction of the tube body, and the bent part is arranged in the tube body; the camera module is connected to the far end of the bending part; in the lens retreating observation process, the active bending section of the insertion part can be controlled to bend so as to observe the inner cavity of the intestinal tract, and when an observation dead angle exists, the bending part can be retreated so that the camera module can be located at the communicating position of the first channel and the second channel, and then the bending part is operated to bend so that the camera module can stretch into the second channel. According to the endoscope, based on the bending arrangement of the second channel relative to the first channel, the camera module located in the second channel can shoot image information which cannot be acquired in the first channel, the observation view field of the whole endoscope is effectively expanded, and therefore the accuracy of diagnosis and treatment is guaranteed.

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] A digestive endoscope is an optomechanical and electrical integrated medical device that integrates optical imaging, mechanical transmission and minimally invasive intervention functions. It includes a gastroscope, a colonoscope and an enteroscope, 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] During the colonoscopy of digestive endoscopy, the natural folds of the intestine may block the view of the colonoscope, making part of the intestinal mucosa unable to be directly observed. On the one hand, it increases the complexity of the doctor's operation of the colonoscopy, which may prolong the examination time and increase the patient's discomfort. 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 technical problems existing in the related art.

[0005] In order to solve the above problems, the present invention adopts the following technical solutions: In a first aspect, the present application provides an insertion portion, which includes a tube body, a bending portion and a camera module, wherein the tube body has a first channel extending through it 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 is extended at least along the radial direction of the tube body; the camera module is connected to the distal end of the bending portion, and the camera module can switch between the first channel and the second channel as the bending portion bends, and when the camera module is located in the second channel, external light is transmitted to the camera module through the second channel.

[0006] Furthermore, the insertion portion also includes a first light guide, which is disposed in the first channel. When the camera module is located in the first channel, the camera module and the first light guide are limitedly matched.

[0007] Furthermore, the insertion part also includes a second light guide, and the second light guide is arranged in the second channel. When the camera module is located in the second channel, the camera module and the second light guide are limitedly matched.

[0008] 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.

[0009] 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.

[0010] 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.

[0011] 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.

[0012] 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.

[0013] 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.

[0014] 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.

[0015] 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.

[0016] 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.

[0017] 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.

[0018] 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.

[0019] 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.

[0020] The technical solution adopted by the present invention can achieve the following beneficial effects: 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

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 creative work.

[0022] Figure 1 This is one of the schematic diagrams of observation of an endoscope in the intestine in the prior art; Figure 2 This is the second schematic diagram of observation of an endoscope in the intestine in the prior art; Figure 3 is a schematic structural diagram of a tube body according to an embodiment of the present application; Figure 4 yes Figure 3 A local enlarged schematic diagram of the middle A; Figure 5 is a schematic structural diagram of an insertion portion of an embodiment of the present application; Figure 6 yes Figure 5 A partial enlarged schematic diagram of point B in the middle; Figure 7 This is one of the schematic diagrams of observation of the insertion portion in the intestine of an embodiment of the present application; Figure 8 This is the second schematic diagram of the insertion portion of the embodiment of the present application in the intestine; Fig. 9 is a schematic structural diagram of an endoscope according to an embodiment of the present application; Fig.10 is a schematic structural diagram of an operating handle of the present embodiment; Fig.11 It is a schematic diagram of the transmission coordination among the driving gear, the adapter and the driven gear in the embodiment of the present application.

[0023] In the figure: 100, tube body; 101, first part; 102, second part; 110, first channel; 120, second channel; 121, limit section; 200, bending part; 300, camera module; 400, first light guide; 500, second light guide; 510, reflecting surface; 600, catheter; 700, operating handle; 710, shell; 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, damping member; 821, annular base; 822, friction part; 900 traction member; a, intestine; b, colonoscope; c, shaded area. DETAILED DESCRIPTION

[0024] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0025] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0026] See also Figure 1 and Figure 2 During the colonoscopy b examination, the doctor inserts the colonoscope b from the anus into the colon, reaches the ileocecal region, and then gradually withdraws the colon 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 the insertion portion, thereby making a detailed observation of various parts of the intestine a.

[0027] The inventors found during the research that due to the limited bending range of the insertion part and the natural folds of the intestine a, when the insertion part reaches the maximum bending range, the camera module at the distal end can hardly observe the entire intestinal cavity, especially the proximal part of the intestinal cavity ( Figure 2 The middle shaded area c) still cannot fall within the shooting angle of the camera module, which means that there is an observation blind spot, resulting in some potential lesions being missed.

[0028] Based on the above situation, the present application embodiment discloses an insertion portion and an endoscope. Figures 3 to 11 , the insertion part and the endoscope provided in the embodiments of the present application are described in detail through specific embodiments and their application scenarios.

[0029] See also Figure 3 , Figure 4 , Figure 5 and Figure 6, the embodiment of the present application discloses an insertion portion, and the disclosed insertion portion can be applied to an endoscope, and in particular, can be applied to a colonoscope in an endoscope. Specifically, the insertion portion includes a tube body 100, a bending portion 200, and a camera module 300, wherein the tube body 100 has a first channel 110 that runs through it axially, and 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 is extended at least along the radial direction of the tube body 100. It should be noted that in the embodiment of the present application, the second channel 120 is extended at least along the radial direction of the tube body 100, which means that the second channel 120 can extend directly 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 embodiment of the present application, the second channel 120 can radially penetrate the tube body 100.

[0030] In the examples of this application, see Figure 5 , Figure 6 , Figure 7 and Figure 8 The camera module 300 is connected to the distal end of the bending portion 200, and the bending portion 200 can bend. The camera module 300 can switch between the first channel 110 and the second channel 120 as the bending portion 200 bends. When the camera module 300 is located in the first channel 110, the camera module 300 can observe the front field of view of the insertion portion, and when the camera module 300 is located in the second channel 120, the camera module 300 can observe the side field of view of the insertion portion.

[0031] For example, the bending portion 200 may be pre-bent. For example, the bending portion 200 may be a threaded tube made of a shape memory alloy. The bending portion 200 may be in a bent state in a natural state. In the embodiment of the present application, in the initial state, the bending portion 200 is constrained in the first channel 110, and the position of the camera module 300 exceeds the connection point between the first channel 110 and the second channel 120. At this time, the bending portion 200 is consistent with the extension posture of the tube body 100. During the insertion process of the insertion portion, the camera 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 operated to bend to observe the intestinal mucosa, if there is still an observation blind spot, the bending portion 200 can be pulled back to the proximal end of the insertion portion. When the camera module 300 retreats to the connection point between the first channel 110 and the second channel 120, the constraining effect of the first channel 110 on the bending portion 200 disappears, and the bending portion 200 can automatically bend to allow the camera module 300 to probe into the second channel 120. At this time, the doctor can continue to push the bending portion 200 to allow the camera module 300 to reach a specific position in the second channel 120.

[0032] Based on the above technical scheme, when the insertion portion of the embodiment of the present application is used in a specific application, during the process of withdrawing the endoscope for observation, the active bending section of the insertion portion can be controlled to bend so that the camera module 300 can observe a larger field of view. When there is still a blind spot in the observation due to the natural folds of the intestine, the bending portion 200 can be retracted so that the camera module 300 is in a position where the first channel 110 and the second channel 120 are connected. The bending portion 200 can bend to allow the camera module 300 to penetrate into the second channel 120. Based on the lateral bending extension of the second channel 120 relative to the first channel, the camera module 300 can capture image information in the second channel 120 that cannot be obtained when it is located in the first channel 110. That is to say, by transferring the camera module 300 from the first channel 110 to the second channel 120, image information with a larger field of view can be obtained, thereby effectively expanding the observation field of the entire endoscope and reducing the risk of omissions caused by blind spots.

[0033] It should be noted that in the embodiment of the present application, the bending portion 200 is connected with a traction member. When the camera module 300 needs to be switched from the second channel 120 to the first channel 110 again, the bending portion 200 can be retracted first to make the camera module 300 located at the connection between the first channel 110 and the second channel 120, and then the bending portion 200 is pulled by the traction member to bend and deform in the reverse direction, and then the bending portion 200 is continuously pushed to make the camera module 300 reach a specific position in the first channel 110. In addition, since the bending action of the bending portion 200 in the tube body 100 is a bending within a smaller range than the bending action of the active bending section of the insertion portion, the bending action of the bending portion 200 does not interfere with or affect the bending action of the active bending section.

[0034] Of course, in some other embodiments of the present application, in addition to adopting the aforementioned prefabricated bending form, the bending portion 200 can also be actively bent by human operation. For example, the bending portion 200 is connected to a traction member, which can be a traction rope. The proximal end of the traction rope extends to the operating handle of the endoscope. The operator can bend the bending portion 200 by pulling the traction rope, thereby switching the camera module 300 between the first channel 110 and the second channel 120. It will not be repeated here.

[0035] It can be understood that when the insertion portion is inserted into the human body cavity, the viewing angle range of the camera module 300 at its distal end is specific. The embodiment of the present application switches the camera module 300 between the first channel 110 and the second channel 120, that is, changes the orientation of the camera module 300 relative to the tube body 100, so that the endoscope can see a wider viewing angle.

[0036] In the examples of this application, see Figure 4 and Figure 6 The insertion part also includes a first light guide 400, which is sealed in the first channel 110. When the camera module 300 is located in the first channel 110, the camera module 300 can cooperate with the first light guide 400 in a limited position. Exemplarily, the first light guide 400 can be a transparent glass sheet. On the one hand, the high transparency of the first light guide 400 can ensure the smooth passage of the optical fiber, thereby reducing the interference with the image quality. On the other hand, the sealed first light guide 400 can effectively prevent the liquid, gas or impurities in the human body cavity from entering the internal channel of the insertion part, thereby ensuring that the bending part 200 and the camera module 300 are free from contamination. At the same time, based on the limited position and stop cooperation between the camera module 300 and the first light guide 400, the camera module 300 can shoot at a specific position every time, that is, the camera module 300 has a positioning function, which helps to reduce problems such as image blur, jitter or distortion, and improve the shooting quality.

[0037] For further technical solutions, please continue to refer to Figure 4 and Figure 6 The insertion part may further include a second light guide 500, which may be a transparent glass sheet sealed in the second channel 120. When the camera module 300 is located in the second channel 120, the camera module 300 and the second light guide 500 are limited and cooperated, and external light on the side of the insertion part is transmitted to the camera module 300 through the second light guide 500. Similarly, the second light guide 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 camera module 300, which will not be repeated here.

[0038] It should be noted that, when the first light guide 400 is provided in the first channel 110 and the second light guide 500 is provided in the second channel 120, the first light guide 400 and the second light guide 500 can work together to completely isolate the liquid, gas or impurities in the human body from entering the first channel 110 and the second channel 120. Since the camera module 300 is movably arranged in the tube body 100 (pushed forward or retracted backward), the bending portion 200 and the camera module 300 can be effectively prevented from being contaminated. After the endoscopic inspection is completed, the bending portion 200 and the camera module 300 can be removed from the tube body 100 for reuse, thereby reducing the use cost of the endoscope.

[0039] For further technical solutions, see Figure 6The second channel 120 has a limiting section 121, which extends linearly. The inner wall size of the second channel 120 in the limiting section 121 matches the radial size of the camera module 300. When the bending portion 200 bends to allow the camera module 300 to probe into the second channel 120, part of the camera module 300 is located in the limiting section 121, and the outer wall of the camera module 300 fits with the inner wall of the limiting section 121. Under such a setting, when the camera module 300 probes into the second channel 120, the limiting section 121 can prevent the camera module 300 from radially jumping, thereby ensuring the stability of the camera module 300 in shooting.

[0040] See also Figure 5 , Figure 6 and Figure 8 In 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.

[0041] 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 .

[0042] 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.

[0043] 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.

[0044] In some embodiments of this application, see Figure 5 , Figure 6 and Figure 7 The insertion part may also include a catheter 600, the distal end of which is connected and fixed to the curved part 200. For example, the curved part 200 in the form of a threaded tube may be embedded in the distal end of the catheter 600, and the wire connected to the camera module 300 is passed through the catheter 600. In the case where the curved part 200 is connected and provided with a traction member, the traction member may also be passed through the catheter 600 and extend to the operating handle. It can be understood that when the camera module 300 switches from the first channel 110 to the second channel 120, the curved part 200 needs to perform the actions of retreating, bending and pushing in sequence. Therefore, the catheter 600 is connected to the curved part 200 and extends to the proximal end to the operating handle, and the pulling force or pushing force can be transmitted to the curved part 200 through the catheter 600.

[0045] See also Figure 9~Figure 11 The embodiment of the present application also discloses an endoscope, which includes an operating handle 700 and the aforementioned insertion portion, wherein the proximal end of the insertion portion is connected to the operating handle 700, and the operating handle 700 includes a shell 710 and a knob 720 rotatably arranged on the shell 710, wherein a traction wheel 730 connected to the knob 720 is arranged in the shell 710, and when the bending portion 200 is connected to a traction member, the proximal end of the traction member is connected to the traction wheel 730, and the bending portion 200 can be controlled to bend by rotating the knob 720.

[0046] As can be seen from the above, when the camera 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, an adapter 740 is also provided in the operating handle 700. The adapter 740 is slidably arranged in the shell 710, and the proximal end of the catheter 600 connected to the bending portion 200 is connected and fixed to the adapter 740. The movement of the adapter 740 can realize pulling or pushing of the catheter 600, thereby realizing the backward retraction or forward pushing action of the bending portion 200.

[0047] In the examples of this application, see Figure 10~Figure 11The adapter 740 includes a handle, a first rack 741 and a second rack 742. The first rack 741 and the second rack 742 are both connected to the handle, and the first rack 741 and the second rack 742 are arranged opposite to and in parallel, so that the adapter 740 has a U-shaped or Y-shaped structure, and the catheter 600 connected to the curved portion 200 can be connected and fixed to the handle. The traction wheel 730 is rotatably arranged in the shell 710, and the traction wheel 730 is coaxially fixedly connected with the driven gear 750. When the driven gear 750 is driven to rotate, it can drive the traction wheel 730 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 a circumferentially extending and non-closed tooth pattern. When the operator turns the knob 720, the driving gear 760 rotates coaxially. The driving gear 760 is configured to sequentially cooperate with the first rack 741, the driven gear 750 and the second rack 742 during rotation.

[0048] Based on this structure, taking the switching of the camera module 300 from the first channel 110 to the second channel 120 as an example, in the initial state, the driving gear 760 is meshed with the first rack 741, and the camera module 300 is located in the first channel 110 at this time. When the operator turns the knob 720, the adapter 740 can be first driven to move toward the proximal side of the operating handle 700, thereby driving the bending portion 200 and the camera module 300 to retreat in the tube body 100 through the catheter 600. As the knob 720 is continuously turned, the driving gear 760 is separated from the first rack 741. , and then meshes with the driven gear 750, thereby driving the traction wheel 730 to rotate, so that the traction member pulls the bending portion 200 to actively bend, so that the camera module 300 is inserted into the second channel 120 as the bending portion 200 bends, and as the operator continues to turn the knob 720, the driving gear 760 separates from the driven gear 750 and meshes with the second rack 742, thereby driving the adapter 740 to move toward the distal end of the operating handle 700, so that the adapter 740 pushes the bending portion 200 and the camera module 300 forward through the catheter 600 to move into place. Under such a setting, when the camera module 300 switches between the first channel 110 and the second channel 120, the three actions of retreat, bending and advancement of the bending portion 200 are integrated into a rotation operation of the knob 720. The operator only needs to turn the knob in the same direction to complete the three actions of retreat, bending and advancement in sequence, which reduces the complexity of the operation while ensuring the accuracy of the operation. It can be understood that when the camera module 300 needs to be switched from the second channel 120 to the first channel 110 , it is only necessary to rotate the knob 720 in the reverse direction, and the bending portion 200 will retract, bend and push again and re-enter the first channel 110 .

[0049] The endoscope of the embodiment of the present application also includes a damping assembly 800, which is disposed in the operating handle 700. The damping assembly 800 is configured to apply a damping force to the adapter 740 and the driven gear 750 to prevent the catheter 600 from causing the bending portion 200 and the camera module 300 to shake randomly during the operation of the endoscope.

[0050] In an optional embodiment, the damping assembly 800 includes a spring 810 and a damping member 820, wherein the damping member 820 is an annular structure, and the spring 810 and the damping member 820 are mounted on the rotating shaft of the knob 720, and the spring 810 is configured to apply an elastic force to the damping member 820 so that the damping member 820 is 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 in the current position, thereby avoiding random shaking of the bending portion 200 and the camera module 300.

[0051] The inventors found during the research process that if the damping member 820 is always kept in a state of frictional contact with the adapter 740 and the driven gear 750, when the operator rotates the operating knob 720, there will be a large rotational damping.

[0052] Based on this situation, in some embodiments of the present application, the damping member 820 includes an annular base 821 and a plurality of friction portions 822 connected to the outside of the annular base 821, the annular base 821 is sleeved on the rotating shaft of the knob 720, and the annular base 821 can be movably arranged along the axial direction of the rotating shaft, and the plurality of friction portions 822 are distributed along the circumference of the annular base 821, and the plurality of friction portions 822 can correspond to the adapter 740 and the driven gear 750. By way of example, the first rack 741, the driven gear 750 and the second rack 742 can respectively correspond to a friction portion 822.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or device including the 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 reverse 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.

[0057] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An insertion portion, characterized in that: It comprises a tube body (100), a bending portion (200) and a camera module (300); wherein: The tube body (100) has a first channel (110) extending through the tube body along its axial direction, and 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) is extended at least along the radial direction of the tube body (100); The camera module (300) is connected to the distal end of the bending portion (200), and the camera module (300) can switch between the first channel (110) and the second channel (120) as the bending portion (200) bends; when the camera module (300) is located in the second channel (120), external light is transmitted to the camera module (300) via the second channel (120).

2. The insertion portion according to claim 1, characterized in that: The insertion portion further comprises a first light guide (400), the first light guide (400) being arranged in the first channel (110), and when the camera module (300) is located in the first channel (110), the camera module (300) and the first light guide (400) are limitedly matched; And / or, the insertion portion further comprises a second light guide (500), the second light guide (500) being arranged in the second channel, and when the camera module (300) is located in the second channel (120), the camera module (300) and the second light guide (500) are limitedly matched.

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

4. The insertion portion according to claim 2, characterized in that: The second light guide (500) has a reflective surface (510) facing the proximal end of the tube body (100), and when the camera module (300) is located in the second channel (120), external light is reflected by the reflective surface (510) and then transmitted to the camera module (300); And / or, 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), the second channel (120) is provided in the second portion, and at the connection point between the first channel (110) and the second channel (120), the thickness of the second portion (102) is greater than the thickness of the first portion (101).

5. The insertion portion according to claim 2, characterized in that: The bending portion (200) is pre-bent, and when the bending portion (200) is located at the connecting point between the first channel (110) and the second channel (120), the bending portion (200) bends toward the second channel (120) so that the camera module (300) can be inserted into the second channel (120); Alternatively, the bending portion (200) is connected to a traction member, and when the bending portion (200) is located at the connection point 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 camera module (300) can be inserted into the second channel (120).

6. The insertion portion according to claim 5, characterized in that It also comprises a catheter (600), the distal end of the catheter (600) being connected and fixed to the curved portion (200), and a wire harness connected to the camera module (300) being passed through the catheter (600).

7. An endoscope, characterized in that: It comprises an operating handle (700) and an insertion portion according to any one of claims 1 to 6, wherein the proximal end of the insertion portion is connected to the operating handle (700); The operating handle (700) comprises a housing (710) and a knob (720) rotatably disposed on the housing (710); a traction wheel (730) connected to the knob (720) is disposed in the housing (710); when a traction member is connected to the curved portion (200), the knob (720) is transmission-connected to the traction member via the traction wheel (730).

8. The endoscope according to claim 7, characterized in that: An adapter (740) is also provided in the operating handle (700). When the curved portion (200) is connected to a catheter (600), the proximal end of the catheter (600) is fixed to the adapter (740); The adapter (740) has a first rack (741) and a second rack (742) which are arranged opposite to each other. The traction wheel (730) is rotatably arranged in the operating handle (700), and the traction wheel (730) is coaxially connected with a driven gear (750). The driven gear (750) is arranged adjacent to the first rack (741) and the second rack (742). A driving gear (760) is arranged on the rotating shaft of the knob (720). The driving gear (760) is configured to sequentially cooperate with the first rack (741), the driven gear (750) and one of the second rack (742) in transmission when rotating.

9. The endoscope according to claim 8, characterized in that A damping assembly (800) is also provided in the operating handle (700); when the camera module (300) is located in the first channel (110) or the second channel (120), the damping assembly (800) is configured to apply a damping force to the adapter (740) and the driven gear (750).

10. The endoscope according to claim 9, characterized in that The damping assembly (800) comprises a spring (810) and a damping member (820), wherein the damping member (820) comprises an annular base (821) and a plurality of friction portions (822) connected to the outer periphery of the annular base (821), the plurality of friction portions (822) being distributed along the circumference of the annular base (821), the spring (810) and the annular base (821) being sleeved on the rotating shaft of the knob (720), and the annular base (821) being movably arranged 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 driving gear (760), and an accommodating gap (762) is formed between the two flanges (761) of the driving gear (760). When the driving 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 part (822) abuts against the flange (761) and is separated from the adapter (740) and the driven gear (750); when the driving gear (760) is separated from the first rack (741), the driven gear (750) and the second rack (742), the friction part (822) corresponds to the accommodating gap (762), and the friction part (822) is in friction contact with the adapter (740) and the driven gear (750).

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