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 technical field of endoscopes. The active bending section of the present invention includes a serpentine joint and a limiting member, wherein a plurality of serpentine joints are sequentially connected, and adjacent serpentine joints are rotationally matched through a hinge part, and adjacent serpentine joints have a rotation gap; the limiting member is installed on the serpentine joint, and the limiting member has a first state and a second state, and the limiting member can be switched between the first state and the second state, wherein, when the limiting member is in the first state, the limiting member is limitedly matched with another adjacent serpentine joint to limit the relative rotation of two adjacent serpentine joints through the hinge part; when the limiting member is in the second state, the limiting cooperation between two adjacent serpentine joints is released, so that the adjacent serpentine joints can continue to rotate through the hinge part. Compared with the prior art, the present invention has the advantage of improving the operability of the endoscope during the insertion process.

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] Endoscopes are widely used in medicine, mainly for examination and surgery of the digestive tract, respiratory tract, and urogenital system. Different examination sites and surgical requirements require different types of endoscopes, such as gastroscopes and colonoscopes for the digestive tract, bronchoscopes for the respiratory system, and cystoscopes for the urogenital system.

[0003] At present, the insertion part of the endoscope is mainly divided into two forms: hard and soft. The insertion part of the hard endoscope is made of hard materials and has good operability, but due to the irregularity of the patient's body cavity, it is more difficult to pass through the tortuous cavity, and it is also inconvenient for doctors to operate, and the adaptability is poor. In contrast, soft endoscopes are more widely used in clinical applications because their soft active bending section can adapt to the irregular shape of the tortuous cavity, but the operability of the insertion process is relatively poor. Summary of the invention

[0004] In order to solve the problem of poor operability during the insertion process of an endoscope, the present application provides an active bending section, an insertion portion and an endoscope.

[0005] In a first aspect, the present application provides an active bending segment, which adopts the following technical solution:

[0006] An active bending section is applied to the insertion part of an endoscope. The active bending section includes a serpentine segment and a limiting member. A plurality of serpentine segments are sequentially connected. Adjacent serpentine segments are rotationally matched through a hinged portion, and there is a rotation gap between adjacent serpentine segments. The limiting member is installed on the serpentine segment. The limiting member has a first state and a second state. The limiting member can switch between the first state and the second state, wherein:

[0007] When the limit member is in the first state, the limit member cooperates with another adjacent snake bone segment to limit the relative rotation of the two adjacent snake bone segments through the hinge part; when the limit member is in the second state, the limit cooperation between the two adjacent snake bone segments is released so that the adjacent snake bone segments can continue to rotate through the hinge part.

[0008] In a second aspect, the present application provides an insertion portion, comprising a passive bending segment and the above-mentioned active bending segment, wherein the distal end of the passive bending segment is connected to the proximal end of the active bending segment.

[0009] In a third aspect, the present application provides an endoscope, comprising an operating handle and the above-mentioned insertion portion, wherein the proximal end of the passive bending section is connected to the operating handle.

[0010] The present invention has the following advantages and beneficial effects:

[0011] When the doctor is operating the endoscope, in the process of inserting the insertion part from the outside into the human body cavity, the limiter is adjusted to the first state, that is, the limiter on one snake bone segment is limited with another adjacent snake bone segment, so that the adjacent snake bone segments in the active bending section cannot rotate relative to each other, so that the entire active bending section can be kept in a relatively hard straight state. At this time, the active bending section is not easy to bend under the action of external force, which to a certain extent avoids the situation that when the insertion part is inserted into the human body cavity, the active bending section is bent and deformed, causing the insertion part to be difficult to continue to enter, which is beneficial to improve the operability of the insertion part in the human body cavity. After the insertion part has been inserted into the human body cavity, the limiter can be adjusted to the second state, that is, the limiter on one snake bone segment is released from the limiter cooperation with another adjacent snake bone segment, so that the adjacent snake bone segment can continue to rotate through the hinged part, and the active bending section at this time will change from the previous hard straight state to a flexible state that can be bent, thereby improving the adaptability of the active bending section in the subsequent tortuous cavity. In summary, by adjusting the hardness of the active bending section, the hardness requirements of the insertion part in different environments can be achieved, which is beneficial to improving the operability during the insertion of the endoscope. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] 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.

[0013] Figure 1 It is a structural schematic diagram of the active bending section of the present application;

[0014] Figure 2 This is a partial schematic diagram of the active bending section of this application Figure 1 ;

[0015] Figure 3 This is a partial cross-section of the active bending section of this application Figure 1 ;

[0016] Figure 4 yes Figure 3 A magnified view of part A in FIG.

[0017] Figure 5 This is a partial cross-section of the active bending section of this application Figure 2 ;

[0018] Figure 6 yes Figure 5 A magnified view of part B in FIG.

[0019] Figure 7 This is a partial cross-section of the active bending section of this application Figure 3 ;

[0020] Figure 8 yes Figure 7 The enlarged view of the C part in FIG.

[0021] Fig. 9 is a schematic cross-sectional view of the active bending section of the present application;

[0022] Fig.10 It is a structural schematic diagram of the insertion part of this application.

[0023] The markings in the figure are:

[0024] 100, snake bone joint; 110, hinged part; 120, rotation gap; 130, docking part; 1310, fitting section; 140, traction rope installation part; 200, limit piece; 210, extension section; 2110, buckle part; 2120, installation groove; 220, abutment section; 2210, first sub-section; 2220, second sub-section; 300, accommodating gap; 400, passive bending section. DETAILED DESCRIPTION

[0025] 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.

[0026] 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.

[0027] In each embodiment of the present application, "proximal end" and "distal end" refer to the position of the endoscope and its components relative to the user in the use environment, wherein the end closer to the user is designated as the "proximal end" and the end farther from the user is designated as the "distal end".

[0028] In the related art, the insertion part of the endoscope includes a hard insertion part and a soft insertion part. When the hard insertion part is used to enter the human body cavity, the operability of the hard insertion part is better than that of the soft insertion part, because the hardness itself is greater, and when the doctor operates the hard insertion part, the hard insertion part can always follow the doctor's operation. Similarly, when the soft insertion part is used to enter the tortuous human body cavity, the passability of the soft insertion part is better than that of the hard insertion part, because the soft texture itself can adapt to the irregular shape of the tortuous cavity.

[0029] After research, the inventors found that the hard insertion part is only suitable for some simple straight human cavities. When faced with a tortuous cavity, the hard insertion part is difficult to pass through, and its adaptability is relatively poor. Similarly, when the soft insertion part initially enters the human cavity, due to its soft texture, it will be difficult to control the soft insertion part when entering the human cavity, which can easily cause the insertion process to get stuck, so that the endoscope cannot be inserted normally. At present, most of the cavities in the human body are straight in the initial insertion section and tortuous in the latter insertion section. Using a hard insertion part or a soft insertion part alone will face the problem of poor operability, making the surgical process quite troublesome.

[0030] In view of the above problems, the present application provides an active bending section, an insertion part and an endoscope. The active bending section has a serpentine joint and a limiting member, and a plurality of serpentine joints are connected in sequence, and adjacent serpentine joints are rotated and matched through a hinge part to achieve the bending of the active bending section. The limiting member is arranged on the serpentine joint and can be limitedly matched with the adjacent serpentine joints so that the rotation of the adjacent serpentine joints is restricted, and the active bending section becomes hard at this time. At the same time, the limiting member can also release the limited cooperation with the adjacent serpentine joints so that the adjacent serpentine joints can continue to rotate, and the active bending section becomes soft at this time. Therefore, the active bending section is helpful in solving the problem of poor operability during the insertion of the endoscope.

[0031] Combine the following Figures 1 to 10 , the active bending section, insertion portion and endoscope provided in the embodiments of the present application are described in detail through specific embodiments and application scenarios.

[0032] In the first aspect, the present application provides an active bending section. The active bending section can be used in an endoscope. Exemplarily, the active bending section has a snake bone segment 100, and a plurality of snake bone segments 100 are connected in sequence, and a hinge portion 110 is provided between adjacent snake bone segments 100, so that adjacent snake bone segments 100 can achieve relative rotation. Exemplarily, the hinge portion 110 is riveted, that is, lugs are provided on two opposite wall surfaces of the snake bone segment 100, and the lugs between adjacent snake bone segments 100 are rotatably connected by riveting. In some embodiments, one of two adjacent snake bone segments 100 is provided with a hanging shaft, and the other is provided with a groove that cooperates with the hanging shaft for rotation. By embedding the hanging shaft into the groove, the mutual rotation of the two adjacent snake bone segments 100 can be achieved.

[0033] For example, there is a rotation gap 120 between adjacent snake bones 100, and the rotation gap 120 can provide a rotation margin for the rotation between adjacent snake bones 100, so that one of the two adjacent snake bones 100 can have a larger degree of tilt displacement relative to the other. Figure 2 As shown, a rotation gap 120 is provided on both sides of the hinge portion 110 on two adjacent serpentine joints 100, and the width of the rotation gap 120 gradually decreases from the middle to both ends, so that the rotation angle of the two adjacent serpentine joints 100 can be larger, which is beneficial to improving the bending range of the active bending section.

[0034] Reference Figure 1 , 2 The active bending section also has a limit member 200, and the limit member 200 is installed on the snake bone segment 100. Exemplarily, the limit member 200 has a first state and a second state, and the limit member 200 can be switched between the first state and the second state, so that the limit member 200 has a state adapted to different insertion environments under different insertion environments. In some embodiments, when the limit member 200 is in the first state, the limit member 200 on one snake bone segment 100 is limitedly matched with another adjacent snake bone segment 100, thereby limiting the relative rotation of the two adjacent snake bone segments 100 through the hinge 110. Exemplarily, when the limit member 200 is in the second state, the limit cooperation between the two adjacent snake bone segments 100 is released, so that the adjacent snake bone segments 100 can continue to rotate through the hinge 110.

[0035] The state of the stopper 200 can be switched according to the current human body cavity environment of the active bending section. When the insertion part enters the initial section of the human body cavity, the human body cavity is relatively straight, and the stopper 200 can be adjusted to the first state so that the adjacent snake bone nodes 100 in the active bending section cannot rotate relative to each other, so that the entire active bending section can be kept in a relatively hard straight state. In this state, the active bending section is not easy to bend under the action of external force, avoiding the situation where the insertion part is difficult to insert due to the bending deformation of the active bending section when entering the human body cavity, thereby improving the operability of the insertion part.

[0036] When the insertion portion has entered the human body cavity and is in a tortuous part, the stopper 200 can be adjusted to the second state, that is, the stopper 200 on one snake bone segment 100 is released from the cooperation with another adjacent snake bone segment 100, so that the adjacent snake bone segment 100 can continue to rotate through the hinge 110. At this time, the active bending section changes from the previous hard straight state to a flexible state that can be bent, thereby improving the adaptability of the active bending section in the subsequent tortuous cavity.

[0037] In some embodiments, the stopper 200 extends from the serpentine joint 100 to another adjacent serpentine joint 100, and when the stopper 200 is in the first state, one end of the stopper 200 and another adjacent serpentine joint 100 are abutted against each other at the rotation gap 120. Exemplarily, there is one stopper 200 corresponding to one rotation gap 120, and the abutment is configured to abut against the rotation gap 120 in the axial direction of the serpentine joint 100. With this arrangement, the rotation between two adjacent serpentine joints 100 will be limited by the abutment force, that is, the two adjacent serpentine joints 100 are not likely to rotate relative to each other at the two rotation gaps 120.

[0038] In some embodiments, in combination Figure 3 , Figure 4 The stopper 200 includes an extension section 210, one end of which is connected to the inner wall of the snake bone joint 100. Figure 5 , Figure 6 , a buckle portion 2110 is punched inwardly at the inner wall of the snake joint 100 near the edge of the snake joint 100, and the buckle portion 2110 forms a mounting groove 2120 for inserting one end of the extension section 210. When the extension section 210 is installed on the inner wall of the snake joint 100, one end of the extension section 210 is directly inserted into the mounting groove 2120, and an adhesive material is poured into the mounting groove 2120 to bond one end of the extension section 210 to the mounting groove 2120. Exemplarily, one end of the extension section 210 is integrally arranged with the inner wall of the snake joint 100.

[0039] In some embodiments, in combination Figure 7 , Figure 8, the other end of the extension section 210 extends into another adjacent snake bone joint 100 after passing through the rotation gap 120. Exemplarily, the extension section 210 is configured as a straight line, and the extension direction of the extension section 210 is consistent with the axial direction of the snake bone joint 100. Exemplarily, the extension direction of the extension section 210 may also be slightly offset from the axial direction of the snake bone joint 100, and the offset direction of the extension section 210 is to extend toward the inner center side close to the snake bone joint 100. Exemplarily, the length of the extension section 210 is longer than the maximum width of the rotation gap 120.

[0040] In some embodiments, there is a accommodating gap 300 between the extension section 210 and the inner wall of the snake bone joint 100, and the accommodating gap 300 is configured to avoid the adjacent snake bone joint 100 when the limiting member 200 switches from the first state to the second state. Exemplarily, when the limiting member 200 is in the second state and the adjacent snake bone joints 100 are rotated to the maximum rotation angle through the hinge 110, at least part of the edge of any snake bone joint 100 close to the rotation gap 120 of the two adjacent snake bone joints 100 does not contact the limiting member 200. Such a configuration makes it difficult for the adjacent snake bone joints 100 to be affected by the position of the limiting member 200 in the second state when rotating relative to each other, so that the two adjacent snake bone joints 100 can rotate normally, and to a certain extent avoid the situation where the edge of the snake bone joint 100 conflicts with the limiting member 200 when rotating, resulting in the inability to continue rotating.

[0041] In some embodiments, reference Figure 8 The stopper 200 further includes a contact section 220, which is bent relative to the extension section 210 to contact the edge of the adjacent serpentine joint 100 near the rotation gap 120. Exemplarily, the contact section 220 includes a first sub-portion 2210 and a second sub-portion 2220 connected to each other, the extension section 210 extends into the adjacent serpentine joint 100, the first sub-portion 2210 is connected to the extension section 210, and at least extends away from the extension section 210, so that the second sub-portion 2220 contacts the edge of the adjacent serpentine joint 100 near the rotation gap 120. Exemplarily, the length of the contact section 220 is greater than the length of the accommodation gap 300, so that the contact section 220 can contact the edge of the serpentine joint 100 near the rotation gap 120 to achieve a normal contact effect.

[0042] In some embodiments, in combination Figure 8When the first sub-portion 2210 of the abutting section 220 extends away from the extension section 210, the extension direction thereof is perpendicular to the axial direction of the snake bone joint 100. On this basis, at least the portion of the second sub-portion 2220 away from the first sub-portion 2210 is located in the rotation gap 120 and abuts against the edge of another adjacent snake bone joint 100 close to the rotation gap 120. With such an arrangement, when two adjacent snake bone joints 100 are subjected to external force and are about to rotate relative to each other, the existence of the second sub-portion 2220 will prevent the rotation of the other adjacent snake bone joint 100, so that the rotation of the other adjacent snake bone joint 100 is restricted by the second sub-portion 2220 and is not easy to continue to rotate, and finally the rotation restriction of the two adjacent snake bone joints 100 is achieved. Exemplarily, the extension section 210 and the abutment section 220 are configured as an integral arrangement, which is beneficial for transferring part of the abutment force applied to the second sub-section 2220 when adjacent snake bone joints 100 rotate to the bending connection between the extension section 210 and the abutment section 220, so as to improve the anti-rotation reliability of the second sub-section 2220.

[0043] Exemplarily, when the first sub-portion 2210 of the abutting section 220 extends away from the extension section 210, the angle formed by its extension direction and the length direction of the extension section 210 is configured to be an acute angle. On this basis, at least a portion of the second sub-portion 2220 away from the first sub-portion 2210 is located in the rotation gap 120, and abuts against the edge of another adjacent snake bone joint 100 close to the rotation gap 120. In this way, when two adjacent snake bone joints 100 are subjected to external force and are about to rotate relative to each other, the pressure generated by the rotation of the other adjacent snake bone joint 100 will be transmitted to the second sub-portion 2220, and because the angle between the extension direction of the first sub-portion 2210 and the extension section 210 is an acute angle, the first sub-portion 2210 itself will bear the pressure generated by the rotation of the other adjacent snake bone joint 100. From the force analysis, it can be seen that the state of the first sub-section 2210 itself will share most of the pressure generated when the other adjacent snake bone joint 100 rotates. At this time, the extension section 210 and the first sub-section 2210 have formed a state that is not easy to bend. The rotational force generated when the other adjacent snake bone joint 100 rotates will make it even more difficult for the first sub-section 2210 to deform, so that the anti-rotation reliability of the first sub-section 2210 and the second sub-section 2220 is further improved.

[0044] In some embodiments, the abutting section 220 is a structural member made of a memory alloy material, and the abutting section 220 is configured to deform toward the extension section 210 when the temperature is greater than a preset value, so that the abutting section 220 is separated from the edge of the adjacent snake bone section 100 to release the limit. Exemplarily, the abutting section 220 made of a memory alloy has a first shape and a second shape, and the first shape and the second shape can be switched between each other, and the trigger condition for the switching is a change in ambient temperature.

[0045] Exemplarily, the first shape is configured such that when the temperature of the abutting section 220 is lower than the human body temperature, and the second shape is configured such that when the temperature of the abutting section 220 is close to or equal to the human body temperature, the abutting section 220 in the first shape is at a position away from the extension section 210 and conflicts with the edge of another adjacent snake bone joint 100, so that the active bending section is maintained in a straight line state with a relatively high overall hardness. Similarly, the abutting section 220 in the second shape is at a position close to the extension section 210, and is no longer in conflict with the edge of another adjacent snake bone joint 100, so that the active bending section is in a bendable and soft state as a whole.

[0046] On this basis, when no surgery is performed, the endoscope can be stored in a place where the temperature is lower than the human body temperature so that the abutment section 220 can remain in the first shape. At this time, if surgery is to be performed, the insertion portion of the endoscope is inserted into the initial section of the human body cavity. At this time, since it takes a short period of time for the temperature in the human body cavity to be transferred to the insertion portion, the insertion portion can be kept in the human body cavity during this short period of time until the ambient temperature of the abutment section 220 in the insertion portion is close to or equal to the temperature of the human body. At this time, the abutment section 220 will switch from the first shape to the second shape under the influence of the ambient temperature. Therefore, after the doctor operates the insertion portion to continue to enter the tortuous human body cavity, the soft active bending section can adapt to the irregular shape of the tortuous cavity, which is beneficial to improve the operability of the insertion process.

[0047] For example, the first shape can also be configured so that the temperature of the abutting section 220 is higher than the human body temperature, and the second shape can be configured so that the temperature of the abutting section 220 is close to or equal to the human body temperature. In this case, when no surgery is performed, the endoscope needs to be stored in a place where the temperature is higher than the human body temperature so that the abutting section 220 can be kept in the first shape. The subsequent use process is similar to the above method, and will not be repeated here.

[0048] In some embodiments, in combination Figure 8 The snake bone joint 100 has a docking portion 130, and the docking portion 130 and the stopper 200 are distributed at both ends of the axial direction of the snake bone joint 100. The docking portion 130 is used to abut against the second sub-portion 2220 of the adjacent snake bone joint 100. Exemplarily, the docking portion 130 is arranged to extend obliquely toward the inner side wall of the snake bone joint 100, so that the position where the docking portion 130 abuts against the second sub-portion 2220 on the adjacent snake bone joint 100 is located inside the rotation gap 120, thereby preventing the position where the docking portion 130 abuts against the second sub-portion 2220 from protruding out of the rotation gap 120 to a certain extent and piercing the skin covered by the outer side of the active bending section.

[0049] For example, since the snake bone joint 100 is formed by a tubular structure, its tube wall is relatively thin, and the contact area of ​​the tube wall is also relatively small, and it is easy to slip and deform after contacting with the second sub-section 2220. Therefore, the end of the docking portion 130 away from the snake bone joint 100 is folded toward the outside of the snake bone joint 100 to form a fitting section 1310, and the second sub-section 2220 on the adjacent snake bone joint 100 can contact the fitting section 1310. Such a configuration allows the second sub-section 2220 and the fitting section 1310 to have a larger contact area, which is beneficial to improving the reliability of the stop between the contact section 220 and the docking portion 130.

[0050] For example, the end of the docking portion 130 away from the snake joint 100 can also be further folded toward the inner side close to the snake joint 100 to form a fitting section 1310. Therefore, after such a configuration, not only can the contact area between the second sub-portion 2220 and the fitting section 1310 be increased to improve the reliability of the stop, but also the position where the second sub-portion 2220 and the fitting section 1310 fit can be further away from the rotation gap 120.

[0051] In some embodiments, Fig. 9 As shown, the inner wall of the snake bone joint 100 is stamped to form a traction rope installation part 140, and the traction rope installation part 140 is used for the traction rope to pass through. Exemplarily, the traction rope installation part 140 is arranged at intervals on multiple snake bone joints 100. For example, on multiple snake bone joints 100 connected in sequence, the first, fourth, sixth... snake bone joints 100 are provided with traction rope installation parts 140, and the remaining snake bone joints 100 are not provided with traction rope installation parts 140. After such arrangement, the structural stability of some snake bone joints 100 can be maintained in a good state, which is beneficial to improving the structural stability of the overall active bending section. Exemplarily, two traction rope installation parts 140 are relatively arranged on the snake bone joint 100, and the two traction rope installation parts 140 are staggered with the hinge part 110 in the circumferential direction of the snake bone joint 100. With such an arrangement, when the traction rope is pulled, the active bending section can be bent normally.

[0052] In some embodiments, in the circumferential direction of the active bending section, the limiting member 200 and the plurality of traction rope mounting portions 140 are staggered. Since there is a traction rope in the traction rope mounting portion 140, if the limiting member 200 is not staggered with the traction rope mounting portion 140, the limiting member 200 will interfere with the traction rope, and even more, the traction rope may not be able to drive the active bending section to bend normally. Therefore, staggering the limiting member 200 with the traction rope mounting portion 140 is beneficial to reduce the interference degree of the limiting member 200 with the traction rope. At the same time, the traction rope can be used normally, and the limiting member 200 can also achieve the limiting purpose normally.

[0053] In some embodiments, in the radial direction of the active bending section, the maximum radial distance between the stopper 200 and the inner wall of the snake bone joint 100 is smaller than the maximum radial distance between the traction rope mounting portion 140 and the inner wall of the snake bone joint 100. Fig. 9 , the distance marked as A in the figure is the maximum radial distance between the stopper 200 and the inner wall of the snake bone, and the distance marked as B in the figure is the maximum radial distance between the traction rope mounting portion 140 and the inner wall of the snake bone joint 100, wherein A is smaller than B. The purpose of such a setting is that since the instrument tube needs to be inserted into the active bending section, the instrument tube will move in the gap between the two traction rope mounting portions 140 in one snake bone joint 100. Therefore, after the stopper 200 is set, it is necessary to ensure that the existence of the stopper 200 does not affect the normal insertion of the instrument tube into the active bending section, that is, it is necessary to ensure that the stopper 200 does not occupy the passing space of the instrument tube in the snake bone joint 100. Therefore, after A is smaller than B, there is a gap between the stopper 200 and the instrument tube inserted into the snake bone joint 100, so that the stopper 200 does not affect the normal insertion of the instrument tube into the snake bone joint 100.

[0054] In a second aspect, the present application also provides an insertion portion, combined with Fig.10 , the insertion portion includes a passive bending section 400 and the aforementioned active bending section. Exemplarily, the passive bending section 400 is coaxially connected to the aforementioned active bending section, wherein the passive bending section 400 is located close to the proximal side, and the active bending section is located close to the distal side, that is, the distal end of the passive bending section 400 is connected to the proximal end of the active bending section. Exemplarily, the passive bending section 400 adopts an integral injection molding structure, and a plurality of bending seams are provided on the surface of the passive bending section 400, through which the passive bending section 400 can be bent, but the degree of bending is smaller than that of the active bending section, because in actual operation, the passive bending section 400 is mainly bent in cooperation with the active bending section, and the active bending section requires a larger bending angle, thereby adapting to the irregular shape of the tortuous cavity. Therefore, the passive bending section 400 does not need to achieve an excessively large bending angle, and then through integral injection molding, it can be beneficial to reduce the manufacturing difficulty of the passive bending section 400 and reduce the preparation cost of the passive bending section 400.

[0055] Exemplarily, the active bending segment can also be configured as an integral injection molding structure. Using integral injection molding to form the active bending segment provided by the present application is also beneficial to reducing the manufacturing difficulty of the active bending segment and reducing the preparation cost of the active bending segment.

[0056] In a third aspect, the present application also provides an endoscope, including an operating handle and the above-mentioned insertion part, in which the proximal end of the passive bending section 400 is connected to the operating handle. Exemplarily, the distal end of the traction rope is connected to the distal end of the active bending section, and the length of the traction rope is adjusted by manipulating the operating handle so that the active bending section can be bent and deformed during the operation, so that the active bending section can be inserted and adapted to different human cavities. Furthermore, by bending the active bending section, the position of the camera module located at the distal end of the insertion part can be adaptively changed to facilitate observation of lesions at different positions.

[0057] The endoscope has the same or corresponding technical features as the aforementioned insertion part, and can achieve the same or corresponding technical effects. At the same time, the endoscope of the embodiment 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 embodiment of the present application does not specifically limit the type of the endoscope.

[0058] 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 the insertion portion of an endoscope, characterized in that: The active bending section comprises: Snake bone joints (100), wherein a plurality of the snake bone joints (100) are sequentially connected, adjacent snake bone joints (100) are rotationally matched via hinged parts (110), and there is a rotation gap (120) between adjacent snake bone joints (100); A limiting member (200), the limiting member (200) being mounted on the snake bone joint (100), the limiting member (200) having a first state and a second state, the limiting member (200) being switchable between the first state and the second state, wherein: When the limiting member (200) is in the first state, the limiting member (200) cooperates with another adjacent snake bone segment (100) to limit the relative rotation of the two adjacent snake bone segments (100) through the hinge portion (110); When the limiting member (200) is in the second state, the limiting cooperation between two adjacent snake bone sections (100) is released, so that the adjacent snake bone sections (100) can continue to rotate through the hinged portion (110); The limiting member (200) comprises an extension section (210) and an abutment section (220), one end of the extension section (210) is connected to the inner wall of the snake bone joint (100), and the abutment section (220) is bent relative to the extension section (210) to abut against the edge of the adjacent snake bone joint (100) close to the rotation gap (120).

2. The active bending section according to claim 1, characterized in that: The limiting member (200) extends from the serpentine joint (100) to another adjacent serpentine joint (100), and when the limiting member (200) is in a first state, one end of the limiting member (200) is abutted against another adjacent serpentine joint (100) at the rotation gap (120).

3. The active bending section according to claim 2, characterized in that: The other end of the extension section (210) extends through the rotation gap (120) to another adjacent snake bone joint (100); An accommodating gap (300) is provided between the extension section (210) and the inner wall of the snake bone joint (100), and the accommodating gap (300) is configured to avoid the adjacent snake bone joint (100) during the process of the limiting member (200) switching from the first state to the second state.

4. The active bending section according to claim 3, characterized in that: The abutment section (220) includes a first sub-section (2210) and a second sub-section (2220) connected to each other. The extension section (210) extends into the adjacent snake bone section (100). The first sub-section (2210) is connected to the extension section (210) and is extended at least back to the extension section (210) so that the second sub-section (2220) abuts against the edge of the adjacent snake bone section (100) close to the rotation gap (120).

5. The active bending section according to claim 4, characterized in that: The abutment section (220) is a structural member made of a memory alloy material. The abutment section (220) is configured such that when the temperature is greater than a preset value, the abutment section (220) deforms toward the extension section (210), so that the abutment section (220) is separated from the edge of the adjacent snake bone section (100) to release the limit.

6. The active bending section according to claim 4, characterized in that: The snake bone joint (100) has a docking portion (130), the docking portion (130) and the limiting member (200) are distributed at two axial ends of the snake bone joint (100), and the docking portion (130) is used to stop and cooperate with the second sub-portion (2220) of the adjacent snake bone joint (100); The docking portion (130) is arranged to extend obliquely toward the inner side of the snake bone joint (100), and one end of the docking portion (130) away from the snake bone joint (100) is folded toward the outer side close to the snake bone joint (100) to form a fitting section (1310), and the second sub-portion (2220) of the adjacent snake bone joint (100) can abut against the fitting section (1310).

7. The active bending section according to any one of claims 1 to 5, characterized in that: The inner wall of the snake bone joint (100) is punched to form a traction rope installation portion (140), and the traction rope installation portion (140) is used for the traction rope to pass through; In the circumferential direction of the active bending section, the limiting member (200) and the plurality of traction rope mounting portions (140) are distributed in a staggered manner.

8. An insertion portion, applied to an endoscope, characterized in that: It comprises a passive bending segment (400) and an active bending segment according to any one of claims 1 to 7, wherein the distal end of the passive bending segment (400) is connected to the proximal end of the active bending segment.

9. An endoscope, characterized in that: It comprises an operating handle and the insertion portion according to claim 8, wherein the proximal end of the passive bending section (400) is connected to the operating handle.

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