Snake bone unit, snake bone, insertion part and endoscope
By providing pivot protrusions and pivoting grooves on the snake bone unit and extending their ends in the circumferential direction, the problem of low bending accuracy of the snake bone segment in the prior art is solved, and higher connection stability and bending accuracy are achieved.
Patent Information
- Application Number
- CN202421119817.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-22
- Publication Date
- 2025-03-21
- Estimated Expiration
- 2034-05-22
AI Technical Summary
In the prior art, the bending accuracy of the snake bone segment is low, resulting in poor use effect.
By providing pivoting protrusions and pivoting grooves at both axial ends of the snake bone unit and extending along the circumferential direction of the snake bone unit, the two adjacent snake bone units are rotated and cooperated with each other under the drive of the traction rope to improve connection stability and bending accuracy.
The connection stability between two adjacent snake bone units is improved, the dislocation situation is avoided, and the bending accuracy of the snake bone segment is enhanced.
Smart Images
Figure CN222640441U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of endoscopes, and in particular relates to a snake bone unit, a snake bone, 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 a snake bone segment, and the snake bone segment is connected to a traction rope, and the bending of the snake bone segment is controlled by the traction rope. In the related art, the snake bone segment includes a plurality of snake bone units, and the front and rear ends of the snake bone units are respectively provided with a pivot groove and a pivot fulcrum, and two adjacent snake bone units are rotated by the cooperation of the pivot groove and the pivot fulcrum. Compared with the riveted snake bone, the snake bone segment of this structure is easier to manufacture and can save metal materials, but its bending accuracy is lower and the use effect is poor. Utility Model Content
[0004] The purpose of the present application is to provide a snake bone unit, a snake bone, an insertion part 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 a snake bone unit, which has two traction channels arranged along its radial direction. The snake bone unit also has a pivot protrusion and a pivot groove distributed at its two axial ends. The pivot protrusion is used to rotate with the pivot groove of the adjacent snake bone unit, and the pivot groove is used to rotate with the pivot protrusion of the adjacent snake bone unit; both ends of the pivot protrusion are extended along the circumference of the snake bone unit toward the corresponding traction channel; both ends of the pivot groove are extended along the circumference of the snake bone unit toward the corresponding traction channel.
[0007] In a second aspect, the present application provides a snake bone, comprising the snake bone unit provided in the first aspect.
[0008] In a third aspect, the present application provides an insertion portion, comprising the snake bone provided in the second aspect.
[0009] In a fourth aspect, the present application provides an endoscope, comprising the insertion portion provided in the third aspect.
[0010] The technical solution provided by this application can achieve the following beneficial effects:
[0011] In the present application, by respectively arranging pivot protrusions and pivot grooves at the axial ends of the snake bone unit, the snake bone unit can rotate and cooperate with the adjacent snake bone unit under the drive of the traction rope to realize the bending function; and the two ends of the pivot protrusion and the two ends of the pivot groove are arranged to extend along the circumference of the snake bone unit toward the corresponding traction channel, so that when the two adjacent snake bone units rotate and cooperate with each other, the parts between the two close to the traction channel can abut against each other, and the contact surface between the pivot protrusions and the pivot grooves between the two is increased, thereby improving the connection stability between the two adjacent snake bone units, avoiding the misalignment of the two adjacent snake bone units, and thus improving the bending accuracy of the snake bones corresponding to the snake bone units. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] 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.
[0013] Figure 1 This is a schematic diagram of the overall structure of the snake bone unit provided in some embodiments of the present application. Figure 1 ;
[0014] Figure 2 This is a schematic diagram of the overall structure of the snake bone unit provided in some embodiments of the present application. Figure 2 ;
[0015] Figure 3 This is a schematic diagram of the overall structure of the snake bone unit provided in some embodiments of the present application. Figure 3 ;
[0016] Figure 4 This is a schematic diagram of the coordination of multiple snake bone units provided in some embodiments of the present application. Figure 1 ;
[0017] Figure 5 This application is about Figure 4 Detailed view of point A;
[0018] Figure 6 This is a schematic diagram of the coordination of multiple snake bone units provided in some embodiments of the present application. Figure 2 ;
[0019] Figure 7 This application is about Figure 6 Detail of point B.
[0020] In the figure: 1000-snake bone unit, 100-pivot protrusion, 110-first rotating part, 111-first rotating surface, 120-first supporting part, 121-first supporting surface, 200-pivot groove, 210-second rotating part, 211-second rotating surface, 220-second supporting part, 221-second supporting surface, 310-first angle, 320-second angle, 330-third angle, 400-supporting partition, 410-rotation protrusion, 420-rotation groove, 500-traction channel, 2000-traction rope. DETAILED DESCRIPTION
[0021] 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.
[0022] 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".
[0023] In the related art, in the snake bone segment that uses the pivot groove and the pivot fulcrum to rotate and cooperate, the two adjacent snake bone units rely on the pivot fulcrum and the pivot groove to achieve connection and support. Since the pivot fulcrum and the pivot groove of the snake bone unit only occupy part of the end surface of the snake bone unit, the contact surface between the adjacent snake bone units is small, and the support between the two is not reliable. Especially when the snake bone unit is deflected, the contact part between the adjacent snake bone units is not sufficient to stabilize the position of the snake bone unit, so that the connection between the two adjacent snake bone units is unstable, and the two snake bone units are prone to misalignment, which affects the bending accuracy of the snake bone segment.
[0024] In view of this, a snake bone unit 1000 is provided in an embodiment of the present application. By expanding the range of the pivot protrusion 100 and the pivot groove 200 and increasing the contact area between the pivot protrusion 100 and the pivot groove 200, the connection stability between two adjacent snake bone units 1000 is improved, thereby ensuring the bending accuracy of the snake bone.
[0025] The snake bone unit 1000 provided in the embodiment of the present application includes two traction channels 500 arranged along its radial direction, and the traction channel 500 is used to pass the traction rope 2000. The snake bone unit 1000 has a pivot protrusion 100 and a pivot groove 200 at both ends of its axial direction. In the case where multiple snake bone units 1000 are connected in series through the traction rope 2000, the pivot protrusion 100 of any snake bone unit 1000 rotates with the pivot groove 200 of its adjacent snake bone unit 1000, and the pivot groove 200 of any snake bone unit 1000 rotates with the pivot protrusion 100 of its adjacent snake bone unit 1000. By pulling the traction rope 2000 located on either side of the snake bone unit 1000, the snake bone unit 1000 can be controlled to deflect toward the side where the traction rope 2000 is located.
[0026] In the embodiment of the present application, both ends of the pivot protrusion 100 are extended along the circumference of the serpentine unit 1000 toward the corresponding traction channel 500, and both ends of the pivot groove 200 are extended along the circumference of the serpentine unit 1000 toward the corresponding traction channel 500. With such a layout, the range of the pivot protrusion 100 and the pivot groove 200 is expanded, and even when the pivot protrusion 100 and the pivot groove 200 between two adjacent serpentine units 1000 rotate, the contact area between the pivot protrusion 100 and the corresponding pivot groove 200 can be guaranteed, thereby stabilizing the position of the serpentine unit 1000 and ensuring the stability of the bending shape of the serpentine where the serpentine unit 1000 is located.
[0027] It can be understood that in the snake bone formed by connecting a plurality of snake bone units 1000 in sequence through the traction rope 2000, in order to ensure that the snake bone can rotate smoothly under the drive of the traction rope 2000, the pivot protrusions 100 and the pivot grooves 200 between adjacent snake bone units 1000 will not fit completely, only part of the area of the two fits, and there is a rotation gap in the rest of the area, providing a rotation margin for the pivot groove 200 and the pivot protrusion 100. By pulling the traction rope 2000, the position of the snake bone unit 1000 is deflected, that is, the rotation gap on the side where the traction rope 2000 is located is reduced, so that the pivot protrusion 100 and the pivot groove 200 on the rotation gap side can contact each other, forming support for the two adjacent snake bone units 1000 and stabilizing the position of the snake bone unit 1000.
[0028] In the process of pulling the traction rope 2000, when the traction rope 2000 is pulled to the extreme position, the parts of the snake bone units 1000 corresponding to the two adjacent traction channels 500 have a tendency to approach each other. Since in the embodiment of the present application, the pivot groove 200 and the pivot protrusion 100 are both arranged to extend toward the traction channel 500, the parts of the snake bone units 1000 corresponding to the traction channel 500 can contact and support each other, thereby avoiding the misalignment between the snake bone units 1000. When the traction rope 2000 is pulled to the extreme position, the multiple snake bone units 1000 on the side where the traction rope 2000 is located can press against each other, thereby ensuring the stability of the bending shape of the snake bone.
[0029] At either end of the snake unit 1000 in the axial direction, the pivot protrusion 100 or the pivot groove 200 is located between the openings of the two traction channels 500. In the circumferential direction of the snake unit 1000, the two ends of the pivot protrusion 100 or the pivot groove 200 are respectively arranged adjacent to the two traction channels 500, and the traction channel 500 corresponding to the end of the pivot protrusion 100 or the end of the pivot groove 200 refers to the traction channel 500 adjacent to the end.
[0030] In some preferred embodiments, the pivot protrusion 100 has a first rotating portion 110 and two first supporting portions 120, the two first supporting portions 120 are respectively located on both sides of the first rotating portion 110, and the two first supporting portions 120 are arranged along the radial direction of the snake bone unit 1000 away from the two ends of the first rotating portion 110, Figure 1 and Figure 2 The pivot groove 200 has a second rotating portion 210 and two second supporting portions 220, the two second supporting portions 220 are respectively located on both sides of the second rotating portion 210, and the ends of the two second supporting portions 220 away from the second rotating portion 210 are arranged along the radial direction of the snake bone unit 1000, referring to Figure 1 and Figure 2 shown.
[0031] The first rotating part 110 is mainly used to rotate with the second rotating part 210 of the pivot groove 200 of the adjacent snake bone unit 1000 to realize the rotation of the two adjacent snake bone units 1000. The first supporting part 120 is mainly used to abut with the second supporting part 220 of the pivot groove 200 of the adjacent snake bone unit 1000. The first supporting part 120 and the second supporting part 220 support each other to stabilize the position of the two adjacent snake bone units 1000. The ends of the two first supporting parts 120 away from the first rotating part 110 and the ends of the two second supporting parts 220 away from the second rotating part 210 are arranged along the radial direction of the snake bone unit 1000, expanding the contact area between the two adjacent snake bone units 1000 and improving the stability of the position of the two adjacent snake bone units 1000. In addition, the range of the first supporting part 120 and the second supporting part 220 is expanded, so that the deflection range of the snake bone unit 1000 is larger, and the corresponding bending range of the snake bone is larger.
[0032] Since the first rotating part 110 needs to rotate with the second rotating part 210 , the surfaces of the first rotating part 110 and the second rotating part 210 that contact each other should be arc surfaces to achieve the deflection of the snake unit 1000 .
[0033] The surface on which the first support portion 120 and the second support portion 220 contact each other may be a curved surface or a flat surface. In some preferred embodiments, the surface of the first support portion 120 used to contact the second support portion 220 is set as the first support surface 121, and the surface of the second support portion 220 used to contact the first support portion 120 is set as the second support surface 221. The first support surface 121 and the second support surface 221 are in surface contact, and the first support surface 121 and the second support surface 221 are both flat surfaces, so as to further increase the contact area between the first support portion 120 and the second support portion 220 corresponding to each other, with reference to Figure 3 shown.
[0034] Further preferably, the surface of the first rotating portion 110 for contacting the second rotating portion 210 is the first rotating surface 111, and the surface of the second rotating portion 210 for contacting the first rotating portion 110 is the second rotating surface 211. The first rotating surface 111 and the second rotating surface 211 are both arc surfaces, and the corresponding first rotating surfaces 111 and the second rotating surfaces 211 are rotationally matched. The first rotating surface 111 is tangent to the corresponding two first supporting surfaces 121, and the second rotating surface 211 is tangent to the corresponding two second supporting surfaces 221. Under such a layout, the snake bone unit 1000 is more likely to deflect relative to the adjacent snake bone unit 1000, and during the deflection process, the rotation of the snake bone unit 1000 is smoother, and the connection between the first rotating surface 111 and the first supporting surface 121 between two adjacent snake bone units 1000 can also abut against the connection between the second rotating surface 211 and the second supporting surface 221 to ensure that during the rotation of the snake bone unit 1000, the two adjacent snake bone units 1000 can have an effective contact area, thereby ensuring the stability of the position of the snake bone unit 1000 during the rotation process.
[0035] In some embodiments of the present application, the angle between the first support surface 121 and the second support surface 221 on the same side of the snake bone unit 1000 is a first angle 310, and the first angle 310 is greater than 10 degrees and less than 20 degrees. Figure 3 The first angle 310 is small, so that the rotation gap between two adjacent snake bone units 1000 is small. When the snake bone unit 1000 is rotated to the right position, the first support part 120 and the second support part 220 between the two adjacent snake bones can be smoothly abutted, avoiding the situation that the first angle 310 is too large, the snake bone unit 1000 rotates too much, and the first support part 120 and the second support part 220 are misaligned and cannot stop and cooperate with each other.
[0036] In some embodiments of the present application, the protrusion degree of the pivot protrusion 100 of the snake bone unit 1000 and the concave angle of the pivot groove 200 are also limited to avoid the situation where two adjacent snake bone units 1000 are misaligned due to the pivot protrusion 100 being too protruding or the pivot groove 200 being too concave. The angle between the two first support surfaces 121 of the pivot protrusion 100 is a second angle 320, which is greater than 80 degrees and less than 110 degrees. The angle between the two second support surfaces 221 of the pivot groove 200 is a third angle 330, which is greater than 120 degrees and less than 150 degrees. Figure 3 shown.
[0037] If the second angle 320 is small, the extension range of the first support surface 121 will be too large. When the snake bone rotates, the first support surface 121 and the second support surface 221 of two adjacent snake bone units 1000 cannot contact each other too much, and even the end of the first support surface 121 close to the traction channel 500 cannot contact the end of the second support surface 221 close to the traction channel 500, resulting in a weakened support effect between the first support surface 121 and the second support surface 221, and the two adjacent snake bone units 1000 are prone to misalignment. If the second angle 320 is large, the angle range corresponding to the adjacent first rotation surface 111 is small, which will affect the rotation between the pivot protrusion 100 and the pivot groove 200, resulting in the pivot groove 200 being unable to limit the pivot protrusion 100, affecting the normal bending of the snake bone unit 1000.
[0038] In some embodiments of the present application, two pivot protrusions 100 or two pivot grooves 200 arranged along the radial direction of the snake bone unit 1000 are generally provided on the same end surface of the snake bone unit 1000, and the connection line of the two pivot protrusions 100 is perpendicular to the connection line of the two traction channels 500, and the connection line of the two pivot grooves 200 is also perpendicular to the connection line of the two traction channels 500. Increasing the number of pivot protrusions 100 and pivot grooves 200 on the snake bone unit 1000 increases the contact area between two adjacent snake bone units 1000, improves the connection stability between adjacent snake bone units 1000, and at the same time, balances the force of the snake bone unit 1000.
[0039] In the process of controlling the position of the snake unit 1000 by the traction rope 2000, the traction rope 2000 presses against the inner wall of the traction channel 500 close to the outer peripheral wall of the snake unit 1000. In some embodiments of the present application, the traction channel 500 is arranged close to the inner peripheral wall of the snake unit 1000, so that the wall thickness of the outer side of the traction channel 500 is greater than the wall thickness of the inner side, thereby improving the strength of the outer wall thickness of the traction channel 500 and improving the damage resistance of this side, thereby avoiding damage to the structure of the snake unit 1000 due to the pressing effect of the traction rope 2000.
[0040] In some embodiments of the present application, a support baffle 400 is also fixed inside the serpentine unit 1000, and the support baffle 400 divides the internal chamber of the serpentine unit 1000 into two different chambers. The support baffle 400 is fixed inside the serpentine unit 1000, and can support the tube wall of the serpentine unit 1000, improve the structural stability of the serpentine unit 1000, and maintain the shape stability of the serpentine unit 1000 when the serpentine unit 1000 is squeezed. The support baffle 400 has a rotation protrusion 410 and a rotation groove 420 distributed at both ends of the axial direction, refer to Figure 1 and Figure 2The rotating protrusion 410 is used to rotate with the rotating groove 420 of the supporting partition 400 of the adjacent snake bone unit 1000, and the rotating groove 420 is used to rotate with the rotating protrusion 410 of the adjacent snake bone unit 1000. The supporting partition 400 can not only improve the structural strength of the snake bone unit 1000, but also increase the supporting part between the two adjacent snake bone units 1000, thereby improving the connection stability of the two adjacent snake bones.
[0041] In some preferred embodiments, in the same snake unit 1000, the pivot protrusion 100 and the rotation protrusion 410 are located at the same end of the snake unit 1000, and the pivot groove 200 and the rotation groove 420 are located at the same end of the snake unit 1000. The structure of the rotation protrusion 410 should be similar to that of the pivot protrusion 100, and the structure of the rotation groove 420 should be similar to that of the pivot groove 200, so as to ensure that the snake unit 1000 can smoothly rotate relative to the adjacent snake unit 1000.
[0042] In order to match the layout of the instrument tube and other components inside the snake bone unit 1000, the support baffle 400 is located on one side of the axis of the snake bone unit 1000. The support baffle 400 is not located at the center of the snake bone unit 1000, but is offset to either side of the snake bone unit 1000, so that the two chambers inside the snake bone unit 1000 are larger and smaller. In some preferred embodiments, the traction channel 500 is located on one side of the support baffle 400 close to the axis of the snake bone unit 1000, and the traction channel 500 is not offset, which is more convenient to control the bending of the snake bone unit 1000. In addition, the traction channel 500 is not offset, which can avoid the traction channel 500 being set in the support baffle 400, affecting the structural strength of the support baffle 400.
[0043] The embodiment of the present application also provides a snake bone, comprising a snake bone unit 1000 of any of the above embodiments. A plurality of snake bone units 1000 are arranged in sequence, and a traction rope 2000 passes through the traction channels 500 of the plurality of snake bone units 1000 in sequence, connecting the plurality of snake bone units 1000 in series, and the pivot protrusions 100 and the pivot grooves 200 of adjacent snake bone units 1000 are mutually engaged, referring to Figures 4 to 7 The structure of the snake bone without bending can be referred to Figure 4 and Figure 5 The structure of the snake bone after bending can be referred to Figure 6 and Figure 7 As shown, the traction rope 2000 on either side is pulled to bend the snake bone, and two adjacent snake bone units 1000 are abutted together on one side close to the traction rope 2000 to support each other.
[0044] The present application also provides an insertion portion, comprising the snake bone provided by any of the above embodiments.
[0045] 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.
[0046] 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. A snake bone unit, characterized in that: The snake bone unit (1000) has two traction channels (500) arranged along its radial direction, and the snake bone unit (1000) also has a pivot protrusion (100) and a pivot groove (200) distributed at two axial ends thereof, the pivot protrusion (100) is used for rotationally cooperating with the pivot groove (200) of the adjacent snake bone unit (1000), and the pivot groove (200) is used for rotationally cooperating with the pivot protrusion (100) of the adjacent snake bone unit (1000); Both ends of the pivot protrusion (100) are extended along the circumference of the snake bone unit (1000) toward the corresponding traction channel (500); Both ends of the pivot groove (200) are extended along the circumference of the snake bone unit (1000) toward the corresponding traction channel (500).
2. A snake bone unit according to claim 1, characterized in that: The pivot protrusion (100) comprises a first rotating portion (110) and two first supporting portions (120), wherein the two first supporting portions (120) are respectively located on both sides of the first rotating portion (110), and the two first supporting portions (120) are arranged along the radial direction of the snake bone unit (1000) at two ends away from the first rotating portion (110); The pivot groove (200) has a second rotating portion (210) and two second supporting portions (220), the two second supporting portions (220) are respectively located on both sides of the second rotating portion (210), and the two second supporting portions (220) are arranged along the radial direction of the snake bone unit (1000) away from two ends of the second rotating portion (210); The first rotating portion (110) is used for rotationally cooperating with the second rotating portion (210) of the corresponding pivot groove (200), and the first supporting portion (120) is used for supportingly cooperating with the second supporting portion (220) of the corresponding pivot groove (200).
3. A snake bone unit according to claim 2, characterized in that: The first supporting portion (120) has a first supporting surface (121), and the second supporting portion (220) has a second supporting surface (221); the first supporting surface (121) and the second supporting surface (221) corresponding to each other are in surface contact with each other, and the first supporting surface (121) and the second supporting surface (221) are both planes.
4. The snake bone unit according to claim 3, characterized in that: The first rotating part (110) has a first rotating surface (111), and the second rotating part (210) has a second rotating surface (211). The first rotating surface (111) and the second rotating surface (211) corresponding to each other are in surface contact with each other, and the first rotating surface (111) and the second rotating surface (211) are both arc surfaces. The first rotating surface (111) is tangent to the corresponding two first supporting surfaces (121), and the second rotating surface (211) is tangent to the corresponding two second supporting surfaces (221).
5. The snake bone unit according to claim 4, characterized in that: The angle between the first support surface (121) and the second support surface (221) located on the same side of the snake bone unit (1000) is a first angle (310), and the first angle (310) is greater than 10 degrees and less than 20 degrees; And / or, the angle between the two first supporting surfaces (121) of the pivot protrusion (100) is a second angle (320), the second angle (320) is greater than 80 degrees and less than 110 degrees, and the angle between the two second supporting surfaces (221) of the pivot groove (200) is a third angle (330), and the third angle (330) is greater than 120 degrees and less than 150 degrees.
6. The snake bone unit according to claim 1, characterized in that: A support partition (400) is fixed inside the snake bone unit (1000), and the support partition (400) divides the internal chamber of the snake bone unit (1000) into two. The support partition (400) has a rotation protrusion (410) and a rotation groove (420) distributed at two axial ends thereof, and the rotation protrusion (410) is used for rotationally cooperating with the rotation groove (420) of the support partition (400) of the adjacent snake bone unit (1000), and the rotation groove (420) is used for rotationally cooperating with the rotation protrusion (410) of the support partition (400) of the adjacent snake bone unit (1000); And / or, the traction channel (500) is arranged close to the inner peripheral wall of the snake bone unit (1000).
7. The snake bone unit according to claim 6, characterized in that: The supporting baffle (400) is located on one side of the axis of the snake bone unit (1000), and the traction channel (500) is located on the side of the supporting baffle (400) close to the axis of the snake bone unit (1000).
8. A snake bone, characterized in that: It comprises the snake bone unit (1000) as described in any one of claims 1 to 7.
9. An insertion portion, characterized in that: Including the snake bone described in claim 8.
10. An endoscope, characterized in that: Comprising the insertion portion according to claim 9.