Active bending section, insertion part and endoscope
By setting the guidance slot and the card connection structure on the pipeline unit of the active bending section, the dislocation layout is to improve the structural strength, which solves the problem of damage to the cut snake bone structure and improves the curved accuracy.
Patent Information
- Application Number
- CN202420585294.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-25
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2034-03-25
AI Technical Summary
In the prior art, the structure of the cut snake bone is susceptible to damage, affecting the bending accuracy and structural strength of the active bending section.
By setting up the first guidance slot on some tube sections, and setting the card connection structure between the two adjacent tubes, setting the first guidance slot and the card connection structure to improve the structural strength and bending of the pipeline unit unit Accuracy.
Effectively avoid structural damage during the bending process, and improves the curved accuracy and structural strength of the active bending segment.
Smart Images
Figure CN222398244U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of endoscopes, and in particular relates to an active bending section, an insertion part and an endoscope. Background Art
[0002] As a medical diagnostic instrument, an endoscope can enter the body and take images of the lesion through a camera packaged at the far end, providing doctors with sufficient diagnostic information to treat the disease. The endoscope includes an insertion part, which can enter the body through a human cavity or a surgical incision.
[0003] The insertion part includes an active bending section, which includes a cut snake bone and a riveted snake bone. The cut snake bone has a simpler structure and lower manufacturing difficulty than the riveted snake bone. However, in actual use, the structure of the cut snake bone is easily damaged, thereby affecting the bending accuracy of the active bending section and affecting the doctor's intraoperative operation. Utility Model Content
[0004] The purpose of the present application is to provide an active bending section, an insertion portion and an endoscope to solve the above-mentioned technical problems existing in the prior art.
[0005] This application is implemented as follows:
[0006] In the first aspect, the present application provides an active bending section, including a first bending section, the first bending section including a plurality of slits arranged along its axial direction and tube segment units located between the slits, part of the tube wall of some tube segment units is deformed toward one side of the inner surface thereof to form a first guide groove, the first guide groove is used to pass the traction rope of the endoscope, a clamping structure is arranged between two adjacent tube segment units, the clamping structure includes a clamping protrusion located at one of the tube segment units and a clamping groove located at the other tube segment unit, the clamping protrusion can be clamped into the clamping groove, wherein, along the circumference of the first bending section, the first guide groove and the clamping structure are staggered.
[0007] In a second aspect, the present application provides an insertion portion, comprising the active bending segment provided in the first aspect.
[0008] In a third aspect, the present application provides an endoscope, comprising the insertion portion provided in the second aspect.
[0009] The technical solution provided by this application can achieve the following beneficial effects:
[0010] In the present application, a first guide groove is provided at some tube segment units to limit the position of the traction rope of the endoscope so that the first bending section can be bent in a preset direction, and a clamping structure is provided between two adjacent tube segment units to ensure that the two adjacent tube segment units can limit each other during the bending process of the first bending section to avoid misalignment of adjacent tube segment units; the first guide groove and the clamping structure are staggered in the circumferential direction of the first bending section to avoid the clamping groove of the clamping structure and the first guide groove being in the same straight line, thereby improving the structural strength of the tube segment unit; even when the operator pulls the traction rope to drive the first bending section to bend and the tube segment units are squeezed against each other, the tube segment unit provided with the first guide groove will not be structurally damaged due to too low structural strength and being squeezed by adjacent tube segment units, thereby avoiding the situation where the bending accuracy of the active bending section is affected by damage to the structure of the tube segment unit. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments of the utility model or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0012] Figure 1 The overall structure of the active bending section provided in some embodiments of the present application is shown in FIG. Figure 1 ;
[0013] Figure 2 This application is about Figure 1 Detailed view of point A;
[0014] Figure 3 This application is about Figure 1 Detail of point B;
[0015] Figure 4 is a side view of an active bending segment provided in some embodiments of the present application;
[0016] Figure 5 The overall structure of the active bending section provided in some embodiments of the present application is shown in FIG. Figure 2 ;
[0017] Figure 6 The overall structure of the active bending section provided in some embodiments of the present application is shown in FIG. Figure 3 ;
[0018] Figure 7 The overall structure of the active bending section provided in some embodiments of the present application is shown in FIG. Figure 4 .
[0019] In the figure: 1000 - active bending section, 100 - first bending section, 110 - gap, 120 - tube segment unit, 130 - first guide groove, 140 - snap-fit structure, 141 - snap-fit protrusion, 142 - snap-fit groove, 200 - second bending section, 210 - snake bone unit, 220 - riveted structure, 230 - second guide groove. DETAILED DESCRIPTION
[0020] The following description provides many different embodiments or examples for implementing different features of the present invention. The components and arrangements described in the following specific examples are only used to simplify the present invention and are only used as examples, not to limit the present invention.
[0021] It should be noted that, in each embodiment of the present application, "proximal end" and "distal end" refer to the position of the endoscope and its accessories 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".
[0022] Although the one-piece cut snake bone has a simple structure and is easy to manufacture, it has poor coaxiality and is not easy to control the bending angle. In the related art, a protrusion and a groove that can be limited and matched are set between two adjacent tube segment units of the one-piece cut snake bone, so that the two adjacent tube segment units can be limited to each other, thereby improving the coaxiality of the one-piece cut snake bone. However, in actual use, the structure of the one-piece cut snake bone is easily damaged, thereby affecting the bending accuracy of the active bending section.
[0023] The inventors have found that the grooves provided on the pipe segments will reduce the structural strength of the pipe segment units. In addition, the guide grooves for passing the traction rope are formed by the indentation of the pipe wall of the pipe segment unit, and the guide grooves are also located on the same straight line as the grooves, which further reduces the structural strength of the pipe segment units. When the traction rope drives the snake bone to bend, the adjacent pipe segment units will squeeze each other. Since the structural strength of the pipe segment units provided with both guide grooves and grooves is too low, they are easily damaged.
[0024] In view of this, an embodiment of the present application provides an active bending section, which improves the structural strength of the one-piece cut snake bone by circumferentially staggering the grooves and guide grooves provided on the tube segment unit, thereby preventing the structure of the snake bone from being damaged.
[0025] The active bending section 1000 provided in the embodiment of the present application includes a first bending section 100, and the first bending section 100 includes a plurality of slits 110 arranged along its axial direction and a tube segment unit 120 located between the slits 110. Part of the tube wall of some tube segment units 120 is deformed toward one side of its inner surface to form a first guide groove 130, and the first guide groove 130 is used to pass the traction rope of the endoscope. By pulling the traction rope, the first bending section 100 can be driven to bend toward the side where the traction rope is located. Specifically, the slit 110 leaves a margin for the rotation of the first bending section 100. When the first bending section 100 rotates toward the side of the traction rope being pulled, the slit 110 on one side of the traction rope is compressed, and the two adjacent tube segment units 120 approach each other until they are pressed against each other, and the active bending section 1000 completes the bending.
[0026] In order to improve the coaxiality of the first curved section 100, a clamping structure 140 is provided between two adjacent pipe segment units 120. The clamping structure 140 includes a clamping protrusion 141 and a clamping groove 142. The clamping protrusion 141 is located at one of the two adjacent pipe segment units 120, and the clamping groove 142 is located at the other of the two adjacent pipe segment units 120. The clamping protrusion 141 can be clamped into the clamping protrusion 141. When the traction rope is pulled to control the bending of the first curved section 100, the gap 110 between the two adjacent pipe segment units 120 is compressed, so that the clamping protrusion 141 can be clamped into the clamping groove 142. The groove wall of the clamping groove 142 is used to limit the clamping protrusion 141 to prevent the two adjacent pipe segment units 120 from twisting. The clamping structure 140 plays an anti-twist role.
[0027] Along the circumference of the first curved section 100, the first guide groove 130 and the clamping structure 140 are staggered. Figure 1 and Figure 2 As shown, the first guide groove 130 and the clamping structure 140 are not in the same straight line. Under such a layout, compared with the prior art, the structural strength of the pipe segment unit 120 provided with both the first guide groove 130 and the clamping groove 142 in the embodiment of the present application can be improved. When the traction rope is pulled to drive the first bending section 100 to bend and the pipe segment unit 120 is squeezed by the adjacent pipe segment unit 120, the force on the part of the pipe segment unit 120 provided with the clamping groove 142 is not in the same straight line as the force on the part of the pipe segment unit 120 provided with the first guide groove 130. The pipe segment unit 120 is not prone to stress concentration, and the pipe segment unit 120 is not easily damaged. Its structure can remain intact and will not affect the bending accuracy of the first bending section 100.
[0028] Since the first guide groove 130 and the clamping structure 140 are staggered in the circumferential direction of the first curved section 100, when the traction rope drives the first curved section 100 to bend, the gap 110 corresponding to the traction rope is first compressed until the tube segment units 120 on both sides of the gap 110 are pressed against each other, and the two tube segment units 120 corresponding to the clamping structure 140 may not be pressed against each other in place, so that the limiting effect of the clamping structure 140 is poor, affecting the coaxiality of the first curved section 100. In some preferred embodiments, reference Figure 2 As shown, at one end of the first guide groove 130 along the circumference of the first curved section 100 , the clamping structure 140 of the tube segment unit 120 corresponding to the first guide groove 130 is located on the same axis of the first curved section 100 .
[0029] In such a layout, under the premise of ensuring the structural strength of the pipe segment unit 120, the first guide groove 130 and the clamping structure 140 are as close as possible. When the traction rope is pulled into place, the traction rope is as close to the clamping structure 140 as possible, and the clamping groove 142 and the clamping protrusion 141 of the clamping structure 140 are clamped into place as much as possible, thereby optimizing the coaxiality of the first curved section 100. It should be explained that the clamping structure 140 corresponding to the first guide groove 130 refers to the clamping groove 142 and / or the clamping protrusion 141 located in the same pipe segment unit 120 as the first guide groove 130.
[0030] In some embodiments, the snap-fit protrusions 141 and the snap-fit grooves 142 between any two adjacent tube segment units 120 are arranged in sequence along the same direction, that is, in the first curved section 100, the snap-fit protrusions 141 and the snap-fit grooves 142 in the snap-fit structure 140 are arranged along the same direction, so that it is possible to avoid the situation where two snap-fit grooves 142 are arranged in one tube segment unit 120, resulting in a decrease in the structural strength of the tube segment unit 120. In some preferred embodiments, along the axial direction of the first curved section 100, the distance between the first guide groove 130 and the bottom of the snap-fit groove 142 gradually increases from the proximal end to the distal end of the first curved section 100, with reference to Figure 5 shown.
[0031] When the traction rope drives the first bending section 100 to bend, the first bending section 100 is squeezed from the distal tube segment unit 120 to the proximal end. The closer to the distal end of the first bending section 100, the more frequently the tube segment unit 120 is used, and the more likely it is to be squeezed. At the same time, the closer to the distal end of the first bending section 100, the farther the first guide groove 130 is from the clamping groove 142, and the structure of the part of the tube segment unit 120 between the clamping groove 142 and the first guide groove 130 is less likely to be damaged. With such a layout, the tube segment unit 120 at the distal end of the first bending section 100 can be prevented from being squeezed and damaged.
[0032] In order to ensure the overall structural strength of the first curved section 100 during use, only part of the pipe segment units 120 are provided with the first guide grooves 130. In order to balance the structural strength of the pipe segment units 120 and the restraining effect of the first guide grooves 130 on the traction rope, the number of the first guide grooves 130 is generally greater than or equal to two, and the number of the pipe segment units 120 between two adjacent first guide grooves 130 is generally greater than or equal to two. This allows the first guide grooves 130 to have a sufficient restraining effect on the traction rope, while also preventing the first guide grooves 130 from excessively affecting the structural strength of the first curved section 100.
[0033] In some preferred embodiments, along the axial direction of the first curved section 100, the depth of the clamping groove 142 is equal to the height of the clamping protrusion 141. When the clamping protrusion 141 is completely embedded in the clamping groove 142, the bottom wall of the clamping groove 142 is pressed against the clamping protrusion 141, and the clamping protrusion 141 is limited, the partial end surfaces of two adjacent pipe segment units 120 corresponding to the clamping protrusion 141 and the clamping groove 142 can be pressed against each other, so that support and limitation are formed between the pipe segment units 120, and the bending accuracy of the first curved section 100 is improved.
[0034] In other preferred embodiments, the distance between two adjacent gaps 110 gradually decreases from the proximal end to the distal end of the first curved section 100, that is, the length of the tube segment unit 120 gradually decreases from the proximal end to the distal end of the first curved section 100. Figure 7 As shown. In the bending process of the first bending section 100, the distal tube segment unit 120 can bend faster than the proximal tube segment unit 120, so that the bending amplitude of the first bending section 100 is reduced. At the same time, the proximal end of the first bending section 100 can have a higher strength to withstand the tension of the traction rope, reducing the risk of breaking the first bending section 100.
[0035] When the traction rope drives the first bending section 100 to bend, the first bending section 100 rotates toward the side where the traction rope is located, and the gap 110 on this side is compressed. If the gap 110 is provided on the other side opposite to the side, the gap 110 is enlarged, and if the gap 110 is not provided, the tube wall of the first bending section 100 is stretched. In order to reduce the force required for the traction rope, make the first bending section 100 easier to bend, and at the same time, to improve the bending accuracy of the first bending section 100, in some embodiments, the plurality of gaps 110 are divided into two gap groups arranged along the radial direction of the first bending section 100, and the two gap groups each include a plurality of gaps 110. The two gap groups are arranged along the radial direction of the first bending section 100, thereby reducing the driving force required for the first bending section 100, making the first bending section 100 easier to bend, and also reducing the force on the traction rope, thereby preventing the traction rope from breaking during use.
[0036] In the circumferential direction of the first bending section 100, the length of the slit 110 on the first bending section 100 is less than the circumference of the first bending section 100. The longer the length of the slit 110, the smaller the driving force required for the first bending section 100 when bending, and the shorter the slit 110, the greater the driving force required for the first bending section 100 when bending. In the case where the length of the slit 110 is less than half the circumference of the first bending section 100, the multiple slits 110 in the two groups of slits can correspond one to one, and the two corresponding slits 110 can be located at the same axial position of the first bending section 100. In the case where the length of the slit 110 is greater than or equal to half the circumference of the first bending section 100, the multiple slits 110 in the two groups of slits need to be staggered in the axial direction of the first bending section 100, refer to Figure 6 and Figure 7 As shown, it is avoided that the two gaps 110 of the two gap groups are located in the same axial direction of the first bending section 100, resulting in the first bending section 100 being broken.
[0037] Corresponding to the two groups of gaps, there are a plurality of first guide grooves 130, and the plurality of first guide grooves 130 can be divided into two groups of first guide groove groups arranged along the radial direction of the first curved section 100. Traction ropes are passed through both groups of first guide grooves, and the two traction ropes respectively control the first curved section 100 to bend in two opposite directions, thereby improving the convenience of use of the first curved section 100.
[0038] The snap-fit structure 140 is generally located in the middle of the gap 110, ensuring that no matter which side the first bending section 100 bends, the driving force required by the first bending section 100 is the same, and the user's operating feel for controlling the first bending section 100 to bend toward both sides is the same, which is convenient for users to use.
[0039] refer to Figure 4 As shown, the direction indicated by the dotted line dd is the arrangement direction of the two groups of gap groups, and the dotted line cc is the arrangement direction of the two pivot centers of the first bending section 100 . The first guide groove 130 is offset to improve the structural strength of the pipe segment unit 120 .
[0040] In some embodiments of the present application, the active bending section 1000 further includes a second bending section 200, which is coaxially arranged with the first bending section 100 and is located at the distal end of the first bending section 100. The second bending section 200 also has two bending directions, and the two bending directions of the second bending section 200 are the same as the two bending directions of the first bending section 100. In such a layout, the first bending section 100 and the second bending section 200 can be controlled to bend together by the same traction rope.
[0041] The specific structure of the second curved section 200 can be referred to Figure 1 and Figure 3 As shown, the second curved section 200 is a riveted snake bone, including a plurality of snake bone units 210 arranged along the axial direction thereof, and two riveted structures 220 arranged along the radial direction of the second curved section 200 are connected between two adjacent snake bone units 210, and the riveted structures 220 serve as pivot centers, and the adjacent snake bone units 210 are rotated through the riveted structures 220. The snake bone unit 210 is also provided with a second guide groove 230 for the traction rope to pass through, and the structure of the second guide groove 230 is similar to that of the first guide groove 130, and the second guide groove 230 is formed by deformation of a part of the tube wall of a part of the snake bone unit 210 toward one side of its inner surface.
[0042] Since the two bending directions of the first bending section 100 need to be the same as the two bending directions of the second bending section 200, in order to make the active bending section 1000 bend smoothly, on the same side of the active bending section 1000, the pivot center of the first bending section 100 and the riveted structure 220 of the second bending section 200 are located on the same axis. Figure 4 As shown, the direction indicated by the dotted line cc is simultaneously the arrangement direction of the riveted structures 220 connected to the same snake unit 210, and the arrangement direction of the pivot center of the same tube segment unit 120. In addition, all the second guide grooves 230 of the second curved section 200 are located in the arrangement direction of any group of first guide grooves of the first curved section 100, so that the traction rope can be passed along the same direction without changing the direction, thereby avoiding the friction between the first guide groove 130 and the second guide groove 230.
[0043] The embodiment of the present application further provides an insertion portion, comprising the active bending segment 1000 provided in any of the above embodiments.
[0044] The embodiment of the present application also provides an endoscope, including the insertion portion provided in the above embodiment. The endoscope in the embodiment of the present application can be a bronchoscope, a pyeloscope, an esophagoscope, a gastroscope, an enteroscope, 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.
[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. An active bending section, characterized in that: The invention comprises a first curved section (100), wherein the first curved section (100) comprises a plurality of slits (110) arranged along its axial direction and tube segment units (120) located between the slits (110); a portion of the tube wall of a portion of the tube segment units (120) is deformed toward one side of its inner surface to form a first guide groove (130); the first guide groove (130) is used for passing a traction rope of an endoscope; a clamping structure (140) is provided between two adjacent tube segment units (120); the clamping structure (140) comprises a clamping protrusion (141) located on one of the tube segment units (120) and a clamping groove (142) located on the other tube segment unit (120); the clamping protrusion (141) can be clamped into the clamping groove (142); wherein, along the circumference of the first curved section (100), the first guide groove (130) and the clamping structure (140) are staggered.
2. An active bending section according to claim 1, characterized in that: One end portion of the first guide groove (130) along the circumference of the first curved section (100) and the clamping structure (140) of the pipe segment unit (120) corresponding to the first guide groove (130) are located on the same axis of the first curved section (100).
3. An active bending section according to claim 2, characterized in that: The snap-fit protrusions (141) and the snap-fit grooves (142) between any two adjacent tube segment units (120) are arranged in sequence along the same direction, and along the axial direction of the first curved section (100), the distance between the first guide groove (130) and the bottom of the snap-fit groove (142) gradually increases from the proximal end to the distal end of the first curved section (100).
4. The active bending section according to claim 1, characterized in that: There are at least two first guide grooves (130), and the number of pipe segment units (120) between two adjacent first guide grooves (130) is greater than or equal to two.
5. The active bending section according to claim 1, characterized in that: Along the axial direction of the first curved section (100), the depth of the snap-fit groove (142) is equal to the height of the snap-fit protrusion (141), so that when the snap-fit protrusion (141) and the bottom wall of the snap-fit groove (142) are in tight contact, partial end surfaces of two adjacent pipe segment units (120) are in contact with each other.
6. The active bending section according to claim 1, characterized in that: The distance between two adjacent gaps (110) gradually decreases along the direction from the proximal end to the distal end of the first curved section (100).
7. The active bending section according to claim 1, characterized in that: The plurality of slits (110) are divided into two slit groups arranged along the radial direction of the first curved section (100), and both slit groups include a plurality of slits (110), and the plurality of slits (110) in the two slit groups are staggeredly distributed in the axial direction of the first curved section (100); There are a plurality of first guide grooves (130), and the plurality of first guide grooves (130) are divided into two first guide groove groups arranged along the radial direction of the first curved section (100).
8. An active bending section according to claim 7, characterized in that: The active bending section (1000) further comprises a second bending section (200), the second bending section (200) being located at the distal end of the first bending section (100), the second bending section (200) having two bending directions, and the two bending directions are the same as the two bending directions of the first bending section (100); The second curved section (200) comprises a plurality of snake bone units (210) arranged along its axial direction, two adjacent snake bone units (210) are connected with two riveted structures (220) arranged along the radial direction of the second curved section (200), and a portion of the tube wall of some of the snake bone units (210) is deformed toward one side of its inner surface to form a second guide groove (230), and the second guide grooves (230) are both located in the arrangement direction of the two groups of the first guide grooves.
9. An insertion portion, characterized in that: It comprises the active bending segment (1000) as described in any one of claims 1 to 8.
10. An endoscope, characterized in that: Comprising the insertion portion according to claim 9.