Active bending section, insertion portion and endoscope

Abstract

The present invention provides an active bending section, an insertion part and an endoscope, and relates to the field of endoscopes. The present invention includes a bending section, which is used to realize the bending adjustment of the active bending section under the pulling of a traction rope, and a suction port is formed on the outer peripheral wall of the bending section; a suction channel is arranged along the axial direction of the bending section, and the distal end of the suction channel is connected with the suction port; a deformation part is connected to the bending section and is located at the suction port, and the deformation part has a first state in which the distal end and the proximal end are relatively far away from each other in the axial direction of the bending section, and a second state in which the distal end and the proximal end are relatively close to each other in the axial direction of the bending section, wherein: in the first state, the deformation part shields the suction port; in the second state, the deformation part exposes the suction port; and a driving member is used to adjust the relative distance between the distal end and the proximal end of the deformation part in the axial direction of the bending section. Compared with the prior art, the present invention has the advantages of improving the smoothness of the insertion part entering the body cavity and enhancing the suction capacity.

Description

Technical Field

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

[0002] During endoscopic surgery, it is usually necessary to inject saline or other fluids into the surgical site to clean the field of vision, expand the operating space, or maintain a suitable surgical environment. In order to prevent fluid accumulation and maintain a clear surgical field of vision, endoscopes are usually equipped with a special reflux channel to drain excess fluid or flushing fluid from the body in a timely manner.

[0003] In the prior art, the reflux channel is installed on the peripheral wall of the front end seat of the endoscope to effectively suck and reflux excess liquid. However, in actual application, the reflux channel occupies the limited space of the front end seat, resulting in an increase in the volume of the front end seat. This increase in volume not only affects the compactness of the structure of the insertion part of the endoscope, but also reduces the smoothness of the insertion part when entering the body cavity. Summary of the invention

[0004] In order to solve the problem that the backflow channel occupies the limited space of the front end seat, thereby affecting the smoothness of the insertion part entering the body cavity, the present application provides an active bending section, an insertion part and an endoscope.

[0005] In a first aspect, the present application provides an active bending section, which is applied to an endoscope and adopts the following technical solution:

[0006] An active bending section, applied to an endoscope, comprises:

[0007] A bending segment, wherein the bending segment is used to achieve bending adjustment of the active bending segment under the pulling of the traction rope, and a suction port is formed on the outer peripheral wall of the bending segment;

[0008] A suction channel, the suction channel is arranged along the axial direction of the curved segment, and the distal end of the suction channel is connected to the suction port;

[0009] A deformation portion, the deformation portion is arranged on the bending segment, the deformation portion comprises a distal end and a proximal end, the distal end and the proximal end of the deformation portion have a first state relatively far away from each other and a second state relatively close to each other in the axial direction of the bending segment, wherein:

[0010] In the first state, the deformed portion at least partially covers the suction port;

[0011] In the second state, the deformation portion exposes the suction port;

[0012] In the process from the first state to the second state, the deformed portion expands along the radial direction of the curved segment;

[0013] A driving member is used to adjust the relative distance between the distal end and the proximal end of the deformation portion in the axial direction of the bending segment.

[0014] Preferably, the deformation portion comprises a mesh fence, which is located outside the suction port and blocks the suction port, wherein:

[0015] In the first state, the portion of the fence between the proximal end and the distal end thereof retracts in the radial direction of the curved segment, so that the mesh of the fence collapses and at least partially covers the suction port;

[0016] In the second state, the portion of the fence between the proximal end and the distal end thereof expands in the radial direction of the curved segment, so that the mesh of the fence expands to expose the suction port;

[0017] During the process from the first state to the second state, the openings of the meshes of the fence are gradually enlarged.

[0018] Preferably, the mesh fence is arranged around the outer peripheral wall of the curved segment, a first diaphragm is arranged between the curved segment and the mesh fence, a suction cavity is formed between the mesh fence and the first diaphragm, and the suction channel is connected to the suction cavity.

[0019] Preferably, the suction port is located on the first diaphragm near the proximal end of the curved segment;

[0020] And / or, the mesh of the fence includes a second return port on the proximal side of the maximum expansion position in the radial direction of the curved segment and a first return port on the distal side, and the expandable diameter of the first return port is larger than the expandable diameter of the second return port;

[0021] And / or, a plurality of mesh holes of the same size are arranged along the circumferential direction of the fence.

[0022] Preferably, in the axial direction of the curved segment, a second diaphragm is laid on the inner circumferential wall or the outer circumferential wall of at least part of the segments of the fence, wherein:

[0023] When the second diaphragm completely covers the inner peripheral wall or the outer peripheral wall of the fence, a communication port connected to the mesh is opened on the second diaphragm, and the communication port is configured to close or open following the mesh.

[0024] Preferably, the proximal end of the fence is fixedly connected to the curved segment or the passive curved segment, the distal end of the fence is a movable end, and the driving member is used to drive the movable end of the fence to approach the proximal end of the fence;

[0025] Alternatively, the distal end of the fence is connected to the curved segment or the front end seat, the proximal end of the fence is a movable end, and the driving member is used to drive the movable end of the fence to approach the proximal end of the fence.

[0026] Preferably, the driving member comprises a pull rope connected to the movable end of the net fence, and the relative distance between the distal end and the proximal end of the net fence can be adjusted by retracting and releasing the pull rope.

[0027] Preferably, the deformation portion comprises a deformation plate, and the deformation plate is located outside the suction port and covers the suction port.

[0028] In a second aspect, the present application provides an insertion portion, which is applied to an endoscope and adopts the following technical solution:

[0029] An insertion portion is applied to an endoscope, comprising a passive bending section, the active bending section described in the above technical solution and a front end seat, wherein the passive bending section, the active bending section and the front end seat are connected in sequence along their axial direction.

[0030] In a third aspect, the present application provides an endoscope, which adopts the following technical solution:

[0031] An endoscope comprises a handle and an insertion portion as described in the above technical solution, wherein the handle is connected to the insertion portion.

[0032] The present invention has the following advantages and beneficial effects:

[0033] The present invention avoids the increase of the size of the front seat by setting the suction port on the curved segment, thereby making the insertion part enter the body cavity more smoothly. From the structure of the curved segment, since each endoscope is installed with a skin on the outer wall of the curved segment before leaving the factory to prevent scratching the body cavity, in the design of the present application, the setting of the deformation part is equivalent to temporarily occupying a part of the space of the skin, replacing the role of a part of the skin, and will not increase the size of the entire curved segment. By setting a driving member, the deformation part can adjust the relative position of its distal end and proximal end along the axial direction of the curved segment. In the first state, the deformation part shields the suction port, and in the second state, the suction port is exposed, so that the suction port can effectively extract excess liquid. At the same time, before the insertion part enters the designated body cavity, the suction port will not be exposed to the outside, avoiding being blocked by mucus or impurities in the body, and also reducing the scratching with the body cavity, thereby reducing the patient's discomfort. In addition, the design ensures the compactness of the structure of the endoscope insertion part and further improves the smoothness of the insertion part entering the body cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] 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.

[0035] Figure 1 It is a schematic diagram intended to show the overall structure of an endoscope.

[0036] Figure 2 It is a structural schematic diagram intended to show the first state of the bending segment and the deformation portion.

[0037] Figure 3 It is a structural schematic diagram intended to show the second state of the deformation portion.

[0038] Figure 4 It is a structural diagram intended to show the fence and attraction channel.

[0039] Figure 5 It is a schematic diagram for showing that the second diaphragm completely covers the fence and has a connecting port at the front end.

[0040] Figure 6 It is a schematic diagram of the structure intended to show that the fence is expanded and partially covered by the second diaphragm.

[0041] Figure 7 It is a structural schematic diagram intended to show the first reflux port and the second reflux port.

[0042] Figure 8 It is a schematic diagram for showing the structure of a deformation plate covering a suction port.

[0043] Fig. 9 It is a schematic diagram intended to show the structure of the deformed plate after expansion.

[0044] Fig.10 It is a schematic diagram for showing the structure of the deformation plate, the limiting ring and the pull rope.

[0045] Fig.11 It is a schematic diagram for showing that the deformation part is a deformation ring.

[0046] The markings in the figure are:

[0047] 1. Bending segment; 11. Snake bone segment; 111. Avoidance port; 12. Suction port;

[0048] 2. deformation part; 21. first state; 22. second state; 23. mesh fence; 24. mesh hole; 241. first return port; 242. second return port; 25. deformation plate; 251. limit ring; 26. deformation ring; 27. positioning ring;

[0049] 3. Attraction channel;

[0050] 4. Driving member; 41. Pull rope;

[0051] 5. first diaphragm; 51. suction cavity;

[0052] 6. a second diaphragm; 61. a communication port;

[0053] 7. front end seat; 71. sliding groove;

[0054] 8. Active bending section;

[0055] 9. Handle; 91. Insertion part; 911. Passive bending section; 92. Skin. DETAILED DESCRIPTION

[0056] 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.

[0057] 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.

[0058] Combine the following Figures 1 to 11 An active bending section, an insertion portion and an endoscope provided in an embodiment of the present application are described in detail through specific embodiments and their application scenarios.

[0059] The present embodiment provides an active bending section, including a bending segment 1. Under the action of the endoscope traction rope, the bending segment 1 can realize active bending adjustment as the size and direction of the traction force change. The bending segment 1 can adopt different structural forms, one of which is a snake bone segment, that is, it is formed by a plurality of snake bone segments 11 hinged to each other. Each snake bone segment 11 is hinged by connecting parts such as pins or hinges so that it can be flexibly rotated within a certain range to adapt to complex endoscopic paths. The shape of each snake bone segment 11 can be annular or semi-annular, and the material is preferably stainless steel, titanium alloy or other flexible and corrosion-resistant materials to enhance the durability and reliability of the structure.

[0060] In addition, the bending segment 1 can also form multiple spaced cuts on the integrated tubular material through cutting technology, so that it has a certain bending ability, thereby achieving active bending adjustment under the action of the traction rope. The specific structure of the bending segment 1 is not specifically limited here and is applicable to the present application.

[0061] Reference Figure 3 and Figure 4 As shown, a suction port 12 is formed on the outer peripheral wall of the curved segment 1, and liquid suction is achieved through the suction channel 3. The suction channel 3 is arranged along the axial direction of the curved segment 1, and can be set on the inner side or outer side of the curved segment 1 through a hose, wherein the hose is preferably arranged on the inner side of the curved segment 1 for easy installation and fixation. At the same time, a bypass port 111 for the hose to bypass is opened on the snake bone segment 11, so that the snake bone segments 11 can rotate normally, and the bypass port 111 can be made by cutting or stamping. The distal end of the hose is connected to the suction port 12 for guiding liquid.

[0062] A deformation portion 2 is provided on the curved segment 1, which is connected to the curved segment 1 and located at the suction port 12, and has a variable shielding state and exposure state. In the axial direction of the curved segment 1, the deformation portion 2 has a distal end and a proximal end, and shields the suction port 12 in the first state 21, so that the inflow of liquid is restricted; while in the second state 22, the deformation portion 2 is relatively close to the distal end, exposing the suction port 12, so that the inflow of liquid is unobstructed. In the process of changing from the first state 21 to the second state 22, the deformation portion 2 expands along the radial direction of the curved segment 1, so that the suction port 12 is gradually exposed, thereby controlling the opening degree of the suction channel 3, and facilitating the adjustment of the opening and closing of the liquid channel and the suction effect under different states. Of course, the deformation portion 2 partially shields the suction port 12 in the first state 21, which can be determined according to actual needs and is within the protection scope of the solution.

[0063] It should be noted that, in the present embodiment, the suction port 12 is cleverly arranged on the curved segment 1, avoiding the front seat 7, avoiding the increase in the size of the front seat 7 caused by the setting of the suction port 12, and ensuring the smoothness of the insertion portion 91 when entering the body cavity. Specifically, from the structure of the curved segment 1, each endoscope is installed with a soft skin 92 on the outer wall of the curved segment 1 when it leaves the factory to prevent the body cavity wall from being scratched during the insertion process. In the design of the present application, the setting of the deformation portion 2 occupies a part of the original space of the skin 92, and the structure of this part of the deformation portion 2 can temporarily replace the skin 92 during the state switching, playing a role in protecting the body cavity. In this way, the deformation portion 2 not only realizes the opening and closing control of the suction port 12, but also does not increase the size of the entire curved segment 1, thereby realizing efficient use of space and maintaining the overall size and operational flexibility of the endoscope.

[0064] As an optional embodiment, the driving member 4 is used to adjust the relative distance between the distal end and the proximal end of the deformation portion 2 in the axial direction of the bending segment 1, so as to control the state transition of the deformation portion 2. In different implementations, the driving member 4 can apply a force by axial push-pull or rotation, so that the deformation portion 2 can be extended and retracted in the axial direction, driving the distance between the distal end and the proximal end to change. The driving member 4 can drive the deformation portion 2 to stretch to the first state 21 along the axial direction, thereby shielding the suction port 12; at the same time, the driving member 4 can drive the deformation portion 2 to shrink to the second state 22 along the axial direction, so that the suction port 12 is exposed. The design of the driving member 4 can be a variety of forms such as pulling, sliding or pneumatic, so as to meet different operating requirements, and the opening and closing degree of the suction port 12 can be controlled by finely adjusting the relative distance, thereby improving the control accuracy and convenience of the liquid suction function.

[0065] As an optional embodiment, the deformation portion 2 adopts a mesh fence 23 structure, which is located outside the suction port 12 and is used to shield the suction port 12. Specifically, when the deformation portion 2 is in the first state 21, the proximal and distal ends of the mesh fence 23 retract along the radial direction of the curved segment 1, causing the mesh 24 of the mesh fence 23 to collapse, at least partially shielding the suction port 12, so as to control the exposure degree of the suction port 12. On the contrary, when the deformation portion 2 is in the second state 22, the proximal and distal ends of the mesh fence 23 expand in the radial direction, so that the mesh 24 of the mesh fence 23 also expands accordingly, thereby increasing the exposure area of ​​the suction port 12, facilitating a stronger liquid suction effect. According to design requirements, in the second state 22, the mesh 24 of the mesh fence 23 can be fully opened or expanded to a specific size to adjust the exposure area of ​​the suction port 12 or completely shield the suction port 12. This design not only realizes the controllable exposure of the suction port 12, but also ensures that the radial size of the curved segment 1 remains unchanged.

[0066] In this embodiment, in order to optimize the suction effect, the net fence 23 is preferably installed at the distal end of the curved segment 1, that is, near the front seat 7. By arranging the net fence 23 at this position, the suction position can be close to the front seat 7, so as to facilitate rapid and effective suction of the liquid in front of the front seat 7. This design effectively shortens the suction path and makes the suction process more efficient.

[0067] It should be emphasized that the design of the mesh fence 23 is not only used to cover the suction port 12, but also plays a role in expanding and opening the channels in the body cavity (such as blood vessels) after expansion, effectively improving the suction efficiency and achieving expansion and dredging effects during the operation.

[0068] As an optional embodiment, the mesh fence 23 is arranged around the outer peripheral wall of the curved segment 1, and the whole is in a ring shape, which is convenient for installation and can increase the suction area. In order to ensure the flexibility of the curved segment 1, a first diaphragm 5 is arranged between the mesh fence 23 and the curved segment 1. The diaphragm is made of flexible materials such as rubber, which can not only protect the normal bending function of the curved segment 1, but also form a suction channel 51 between the mesh fence 23 and the curved segment 1. The suction channel 51 is connected with the mesh 24 of the mesh fence 23 to form an effective liquid channel, so that body fluids or other substances can enter the suction channel 3 through the suction channel 51 to achieve efficient suction. The first diaphragm 5 also effectively isolates the structure of the curved segment 1 and the mesh fence 23, preventing the sucked liquid from entering the curved segment 1, thereby damaging the signal line and other structures in the curved segment 1. At the same time, through the connection with the suction channel 3, it is ensured that the liquid is smoothly guided to the suction channel 3, further enhancing the operating efficiency of the endoscope.

[0069] As an optional embodiment, the suction port 12 is located on the first diaphragm 5 near the proximal end of the curved segment 1. This layout enables the distal end of the mesh fence 23 to preferentially approach the area where suction is required when the endoscope is inserted into the body cavity, thereby improving the suction efficiency. The design of the suction port 12 near the proximal end also allows the liquid to quickly enter the suction channel 3 and be quickly discharged through the connection with the suction channel 3, which helps to reduce resistance and liquid retention during the operation.

[0070] As an optional embodiment, the design of the mesh fence 23 is further optimized, and the mesh fence 23 includes a second return port 242 on the proximal side of the maximum expansion position in the radial direction of the curved segment 1 and a first return port 241 on the distal side. The expandable caliber of the first return port 241 is larger than the expandable caliber of the second return port 242. This differentiated design makes it easier for liquid to enter through the larger first return port 241 at the distal end during the suction process, thereby improving the suction efficiency of the suction channel.

[0071] In addition, multiple meshes 24 of the same size are evenly arranged along the circumferential direction of the net fence 23 to ensure a 360-degree uniform suction effect and avoid accumulation or uneven flow of liquid in the chamber. The design of the mesh 24 not only increases the total area through which the liquid passes, but also further enhances the dredging and suction effects when the net fence 23 expands radially. Of course, it should be noted that the sizes of the meshes 24 evenly arranged in the circumferential direction of the net fence 23 can also be different, and can be designed and manufactured according to specific scenarios.

[0072] As an optional embodiment, in order to further optimize the suction effect of the mesh fence 23, a second diaphragm 6 is laid on the inner circumferential wall or outer circumferential wall of at least part of the mesh fence 23 in the axial direction of the curved segment 1. The specific position can be determined according to the needs. Of course, the second diaphragm 6 is located on the outer circumferential wall of the mesh fence 23, which is the best position. The coverage area of ​​the second diaphragm 6 can be flexibly adjusted so as to control the suction area of ​​the mesh 24 of the mesh fence 23 when needed, so as to achieve precise regulation of liquid flow. At the same time, the second diaphragm 6 can protect the structure of the mesh fence 23 and effectively reduce the friction between the mesh fence 23 and the body cavity wall to avoid direct contact with the body cavity. In the optimal design scheme, the second diaphragm 6 is laid circumferentially from the proximal end of the mesh fence 23 to form a bowl-shaped expansion suction shape to increase the open area of ​​the suction port 12, thereby significantly improving the suction efficiency.

[0073] Among them, refer to Figure 6 As shown, when the second diaphragm 6 completely covers the inner peripheral wall or the outer peripheral wall of the mesh fence 23, a communication port 61 connected to the mesh 24 is provided on the diaphragm. The communication port 61 is configured to be synchronized with the opening and closing of the mesh 24 to ensure that the suction path is not blocked when the diaphragm completely covers the mesh fence 23. In this way, the communication port 61 remains unobstructed when the mesh 24 is opened, allowing the liquid to smoothly enter the suction channel 3; and when the mesh 24 is closed, the communication port 61 is closed synchronously to prevent unnecessary liquid from flowing in. This design ensures the effectiveness of the suction function, and at the same time, through the regulation of the second diaphragm 6, the exposure and shielding of the suction port 12 are more flexible.

[0074] As an optional embodiment, the proximal end of the net fence 23 can be fixedly connected to the curved segment 1 or the passive curved segment 911, and the distal end of the net fence 23 is the active end. The driving member 4 is used to drive the active end of the net fence 23 to move closer to the proximal end of the net fence 23, thereby achieving the expansion or contraction of the net fence 23, ensuring effective control of the suction area. Through the drive of the driving member 4, the active end of the net fence 23 can be flexibly adjusted to meet the suction requirements of different body cavity environments.

[0075] In another design, the distal end of the fence 23 is fixedly connected to the curved segment 1 or the front seat 7, and the proximal end is used as a movable end. The driving member 4 is also used to drive the proximal movable end of the fence 23 to move toward the distal end. In this structure, the proximal end of the fence 23 can be adjusted under the action of the driving member 4.

[0076] As an optional embodiment, refer to Fig.11 As shown, the deformation portion 2 can be directly a deformation ring 26, and the deformation ring 26 is made of silicone rubber or polyurethane (PU) or polyethylene (PE) and other materials, so that the deformation ring 26 can move and deform in the axial direction. The deformation ring 26 is sleeved on the distal end of the bending segment 1 and blocks the suction port 12. It only needs to pull the distal end of the deformation ring 26 to slide along the axial direction of the bending segment 1 to expand the deformation ring 26 and open the suction port 12 so that the suction port 12 can be used normally. At the same time, in order to facilitate pulling the deformation ring 26, the distal end of the deformation ring 26 can be coaxially embedded or fixed with a positioning ring 27. It only needs to pull the positioning ring 27 to drive the entire deformation ring 26 to expand and open the suction port 12.

[0077] As an optional embodiment, the deformation ring 26 can be directly replaced by the skin 92 , and the skin 92 is directly pulled to translate along the axial direction of the bending segment 1 to expose the suction port 12 .

[0078] As an optional embodiment, refer to Figure 6 As shown, the driving member 4 is designed with a pull rope 41 to achieve flexible adjustment of the relative distance between the distal end and the proximal end of the net fence 23. Of course, in other implementations, the pull rope 41 can also be replaced by a push rod, and the push rod is used to transmit a pulling force or a pushing force to the net fence 23. Specifically, the pull rope 41 can be selectively connected to the distal end or the proximal end of the net fence 23, or located at both ends of the net fence 23 at the same time, and the two ends of the net fence 23 can be pulled in opposite directions at the same time. When the pull rope 41 is fixedly connected to the distal end of the net fence 23, the proximal end of the net fence 23 needs to be fixed, and when the pull rope 41 is connected to the proximal end of the net fence 23, the distal end of the net fence 23 needs to be fixed. When the pull rope 41 is connected to the proximal end of the net fence 23, it needs to be designed to go around the proximal end of the front seat 7, and with the help of structures such as a steering ring or a reversing wheel, when the operator pulls the pull rope 41 at the handle 9, the pulling force is transmitted to the proximal end of the net fence 23 through the steering ring or the reversing wheel, thereby causing the net fence 23 to deform and expand. This design cleverly utilizes the direction conversion of the pull rope 41, so that the net fence 23 can maintain the required shape in the curved segment 1, and can also achieve dynamic adjustment through the retraction and release of the pull rope 41 during operation, achieving a more flexible control effect.

[0079] In this embodiment, the proximal end of the net fence 23 is fixedly connected to a serpentine joint 11 of the curved segment 1, and the distal end is fixedly connected to the front seat 7. The front seat 7 is provided with a sliding groove 71, and the distal end of the curved segment 1 is slidably connected in the sliding groove 71, so as to achieve smooth displacement during operation. The distal end of the pull rope 41 is fixedly connected to the front seat 7, and the proximal end is arranged in the handle 9 along the insertion portion 91. Through the pull wheel on the handle 9 or the micro-motor traction provided in the handle 9, the operator can easily control the pulling or loosening of the pull rope 41. During operation, the front seat 7 can be moved backward by pulling the pull rope 41, thereby driving the net fence 23 to expand in the radial direction, so that the net fence 23 is in an open state for suction over a larger area. When the pull rope 41 is released, the net fence 23 automatically resumes the contraction in the radial direction under the action of its own elastic force and returns to the first state 21.

[0080] As an optional embodiment, refer to Figures 8 to 10 As shown, the deformation part 2 includes a deformation plate 25, which is located on the outside of the suction port 12, shielding the suction port 12 to prevent foreign matter from entering. Under the action of the pull rope 41, the deformation plate 25 can be effectively expanded, thereby opening the suction port 12 and ensuring the flexible use of the suction function. The deformation plate 25 can be made of materials such as PVC, and the surface must be kept smooth to avoid scratching the body cavity and ensure the smoothness of insertion. In this embodiment, four deformation plates 25 are evenly arranged along the circumference of the curved segment 1, and the specific number can be determined according to specific needs. The distal ends of these deformation plates 25 are fixed together by a limit ring 251. By pulling the limit ring 251 by the pull rope 41, the expansion of the four deformation plates 25 can be driven at the same time, which improves the consistency of operation and the unity of control. The installation method of the limit ring 251 can be slidingly installed in the skin 92 to avoid direct contact between the limit ring 251 and the body cavity, thereby reducing the potential risk of scratching. In addition, in another embodiment, the design of the deformable plate 25 may also allow it to slide along the axial direction of the curved segment 1 to open and close the suction port 12, further enhancing the flexibility and adaptability of the operation.

[0081] As an optional embodiment, refer to Figure 1 As shown, the insertion portion 91 includes a passive bending section 911, an active bending section 8 and a front end seat 7, and these three parts are connected in sequence along the axial direction to form the entire insertion portion 91 structure. Among them, the passive bending section 911 is installed at the front end of the handle 9, which is designed as a flexible structure that can adapt to the curve and shape of the body cavity to reduce damage to the tissue. The active bending section 8 is connected to the distal end of the passive bending section 911, and is usually composed of mutually hinged serpentine joints 11 and a skin 92, which can adjust the bending angle in real time to achieve precise control. The front end seat 7 is installed at the distal end of the active bending section 8, and the front end seat 7 carries the light source, camera and other key components. These three parts together form an integrated endoscope system.

[0082] As an optional embodiment, the present application also provides an endoscope, the overall structure of which includes a handle 9 and an insertion portion 91 of the above technical solution. The handle 9 is designed to be ergonomically shaped to ensure the comfort and stability of the operator during use. The handle 9 integrates a power module and a control button, allowing the operator to adjust the function of the insertion portion 91 in real time, such as adjusting the bending angle and starting the suction function.

[0083] In addition, it should be emphasized that the endoscope in the embodiments of the present application can be a bronchoscope, a pyeloscope, an esophagoscope, a gastroscope, a colonoscope, an otoscope, a rhinoscope, a stomatoscope, a laryngoscope, a colposcope, a laparoscope, an arthroscope, etc. The embodiments of the present application do not impose specific restrictions on the type of endoscope.

[0084] 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.

[0085] 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 active bending section, applied to an endoscope, the active bending section (8) comprising a snake bone section (11) and a skin (92) hinged to each other, characterized in that: include: A bending segment (1), the bending segment (1) being used to achieve bending adjustment of the active bending segment (8) under the pulling of a traction rope, and a suction port (12) being formed on an outer peripheral wall of the bending segment (1); A suction channel (3), the suction channel (3) being arranged along the axial direction of the curved segment (1), and the distal end of the suction channel (3) being connected to the suction port (12); A deformation portion (2), the deformation portion (2) being arranged on the bending segment (1) and occupying a portion of the original space of the skin (92), the deformation portion comprising a distal end and a proximal end, the distal end and the proximal end of the deformation portion (2) having a first state (21) being relatively far apart and a second state (22) being relatively close in the axial direction of the bending segment (1), the deformation portion (2) comprising a mesh fence (23), wherein: In the first state (21), the deformed portion (2) at least partially covers the suction port (12) to prevent foreign matter from entering; In the second state (22), the deformed portion (2) exposes the suction port (12) to facilitate suction of liquid; During the process from the first state (21) to the second state (22), the deformed portion (2) expands along the radial direction of the curved segment (1); A driving member (4), the driving member (4) being used to adjust the relative distance between the distal end and the proximal end of the deformation portion (2) in the axial direction of the bending segment (1).

2. An active bending section according to claim 1, characterized in that: The net fence (23) is located outside the suction port (12) and shields the suction port (12), wherein: In the first state (21), the mesh fence (23) between its proximal end and distal end retracts in the radial direction of the curved segment (1), so that the mesh (24) of the mesh fence (23) collapses and at least partially covers the suction port (12); In the second state (22), the portion of the mesh fence (23) between its proximal end and distal end expands in the radial direction of the curved segment (1), so that the mesh (24) of the mesh fence (23) expands to expose the suction port (12); During the process from the first state (21) to the second state (22), the opening of the mesh (24) of the net fence (23) gradually expands.

3. An active bending section according to claim 2, characterized in that: The mesh fence (23) is arranged around the outer peripheral wall of the curved segment (1), a first diaphragm (5) is arranged between the curved segment (1) and the mesh fence (23), a suction cavity (51) is formed between the mesh fence (23) and the first diaphragm (5), and the suction channel (3) is connected to the suction cavity (51).

4. An active bending section according to claim 3, characterized in that: The suction port (12) is located on the first diaphragm (5) at a position close to the proximal end of the curved segment (1); And / or, the mesh (24) of the net fence (23) comprises a second return opening (242) on the proximal side of the maximum expansion position in the radial direction of the curved segment (1) and a first return opening (241) on the distal side, and the expandable caliber of the first return opening (241) is larger than the expandable caliber of the second return opening (242); And / or, a plurality of mesh holes (24) of uniform size are arranged along the circumferential direction of the mesh fence (23).

5. An active bending section according to claim 4, characterized in that: In the axial direction of the curved segment (1), a second diaphragm (6) is laid on the inner peripheral wall or the outer peripheral wall of at least part of the segment of the fence (23), wherein: When the second diaphragm (6) completely covers the inner peripheral wall or the outer peripheral wall of the mesh fence (23), a communication port (61) connected to the mesh (24) is opened on the second diaphragm (6), and the communication port (61) is configured to close or open following the mesh (24).

6. An active bending section according to claim 4, characterized in that: The proximal end of the net fence (23) is fixedly connected to the curved segment (1) or the passive curved segment (911), the distal end of the net fence (23) is a movable end, and the driving member (4) is used to drive the movable end of the net fence (23) to approach the proximal end of the net fence (23); Alternatively, the distal end of the net fence (23) is connected to the curved segment (1) or the front end seat (7), the proximal end of the net fence (23) is a movable end, and the driving member (4) is used to drive the movable end of the net fence (23) to approach the proximal end of the net fence (23).

7. An active bending section according to claim 6, characterized in that: The driving member (4) comprises a pull rope (41), wherein the pull rope (41) is connected to a movable end of the net fence (23), and the relative distance between the distal end and the proximal end of the net fence (23) is adjusted by retracting and releasing the pull rope (41).

8. The active bending section according to claim 1, characterized in that: The deformation portion (2) comprises a deformation plate (25), wherein the deformation plate (25) is located outside the suction port (12) and blocks the suction port (12).

9. An insertion portion, applied to an endoscope, characterized in that: It comprises a passive bending section (911), an active bending section (8) as claimed in any one of claims 1 to 8, and a front end seat (7), wherein the passive bending section (911), the active bending section (8) and the front end seat (7) are connected in sequence along their axial direction.

10. An endoscope, characterized in that: It comprises a handle (9) and an insertion portion (91) according to claim 9, wherein the handle (9) is connected to the insertion portion (91).

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