CN108125665B - Rivet-free snake bone component with changeable bending radius for endoscope - Google Patents
Rivet-free snake bone component with changeable bending radius for endoscope Download PDFInfo
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- CN108125665B CN108125665B CN201810017292.8A CN201810017292A CN108125665B CN 108125665 B CN108125665 B CN 108125665B CN 201810017292 A CN201810017292 A CN 201810017292A CN 108125665 B CN108125665 B CN 108125665B
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- 238000005452 bending Methods 0.000 title claims abstract description 67
- 241000270295 Serpentes Species 0.000 title claims abstract description 55
- 210000000988 bone and bone Anatomy 0.000 title claims abstract description 55
- 210000001503 joint Anatomy 0.000 claims abstract description 91
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 238000003698 laser cutting Methods 0.000 claims description 4
- 230000005266 beta plus decay Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000003466 welding Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000004323 axial length Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/005—Flexible endoscopes
- A61B1/0051—Flexible endoscopes with controlled bending of insertion part
- A61B1/0055—Constructional details of insertion parts, e.g. vertebral elements
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00064—Constructional details of the endoscope body
- A61B1/00071—Insertion part of the endoscope body
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Surgery (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Biomedical Technology (AREA)
- Optics & Photonics (AREA)
- Pathology (AREA)
- Radiology & Medical Imaging (AREA)
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- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
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- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Endoscopes (AREA)
Abstract
The invention discloses a rivet-free snake bone component with a changeable bending radius for an endoscope, which comprises a front joint ring, m front middle joint rings, n rear middle joint rings and a rear joint ring which are connected in sequence; the two adjacent joint rings are connected through a connecting pair of a hinge structure formed by the mutual matching of the first connecting part and the second connecting part; two connecting parts are symmetrically formed at the connecting end of the same joint ring; two connecting parts of the same joint ring form a rotation center, wherein one joint ring can rotate around the rotation center by an angle relative to the joint ring connected with the rotation center; the end surfaces between the two connecting parts form concave surfaces on two sides of the connecting parts respectively so as to form an included angle between the end surfaces of two adjacent joint rings; the length of the front middle joint ring is smaller than that of the rear middle joint ring. The invention can minimize the outline dimension of the bending part and ensure the maximization of the inner cavity space.
Description
Technical Field
The invention relates to an endoscope component, in particular to a rivetless snake bone component with a changeable bending radius for an endoscope.
Background
An endoscope is a medical and industrial detection instrument with very wide application, and the bending part is bent and changed by a method of drawing a plurality of snake bone joints connected with each other by a steel wire rope. The current mature snake bone joints generally have the following three basic features: firstly, a traction hole is formed in a snake bone joint and used for penetrating a traction steel wire rope; secondly, adjacent snake bone joints are riveted through rivets to form a hinge, so that relative rotation is realized; third, the snake bone joint has sufficient space for the passage of the contents of the forceps channel tube, the light guide beam, and the electrical wires.
However, since the manufacturing and assembling processes of the rivet connection are very complicated, the technical requirements for workers are high, and the riveting defect is extremely easy to occur. Particularly for small diameter endoscopes (diameters generally not greater than 1 mm), the connection of the snake bone joints by rivet riveting is extremely difficult. And the use of rivets also causes the following two problems: firstly, the rivet structure occupies precious space in the inner cavity of the snake bone joint, and under the condition that the diameter of the insertion part of the endoscope is smaller, once the inner cavity space of the snake bone joint is occupied by the rivet, sufficient space cannot be reserved for the inner storage of a forceps channel pipe, a light guide beam, an electric wire and the like; second, the rivet structure increases the outer dimension of the bending portion, which tends to affect the insertion performance of the endoscope.
In modern medical diagnosis and treatment and industrial detection, the requirement of an endoscope with smaller diameter and bending radius is urgent, and a snake bone component arranged at the forefront end of the endoscope naturally becomes a technical difficulty to be overcome. The existing rivet or rivetless snake bone with the same pitch cannot enable the diameter and the bending radius to meet the requirements at the same time.
Disclosure of Invention
The invention aims to provide a rivet-free snake bone component with a changeable bending radius for an endoscope, which can enable the diameter and the bending radius to meet the requirements at the same time.
In order to solve the technical problems, the technical solution of the rivet-free snake bone component for the endoscope with the changeable bending radius is as follows:
comprises a front joint ring 1, m front middle joint rings 2, n rear middle joint rings 3 and a rear joint ring 4 which are connected in sequence; the two adjacent joint rings are connected through a connecting pair of a hinge structure formed by the mutual matching of the first connecting part 6 and the second connecting part 7; the first connecting part 6 of one joint ring can rotate relative to the second connecting part 7 of the joint ring connected with the first connecting part; two connecting parts are symmetrically formed at the connecting end of the same joint ring; two connecting parts of the same joint ring form a rotation center, wherein one joint ring can rotate around the rotation center by an angle relative to the joint ring connected with the rotation center, so that the snake bone component is bent; the end surfaces between the two connecting parts form concave surfaces on two sides of the connecting parts respectively so as to form an included angle between the end surfaces of two adjacent joint rings; wherein the maximum bending angle of each section is formed by the maximum angle that one section ring can rotate relative to the section ring connected with the maximum bending angle; because the two sides of the connecting pair form included angles respectively, the snake bone component can be bent upwards or downwards; the length of the front middle joint ring 2 is smaller than that of the rear middle joint ring 3; a first included angle alpha is formed between the upper end surfaces of the adjacent front middle joint rings 2, and a second included angle beta is formed between the upper end surfaces of the adjacent rear middle joint rings 3; the first included angle alpha is larger than the second included angle beta, so that the maximum upper bending angle alpha of the adjacent front middle joint ring 2 is larger than the maximum upper bending angle beta of the adjacent rear middle joint ring 3, and the snake bone component realizes variable upper bending radius; a third included angle epsilon is formed between the lower end surfaces of the adjacent front middle joint rings 2, and a fourth included angle theta is formed between the lower end surfaces of the adjacent rear middle joint rings 3; the third included angle epsilon is larger than the fourth included angle theta so that the maximum lower bending angle epsilon of the adjacent front middle joint ring 2 is larger than the maximum lower bending angle theta of the adjacent rear middle joint ring 3, thereby realizing the variable lower bending radius of the snake bone component.
The invention discloses a rivet-free snake bone component with variable bending radius for an endoscope, which has the technical effects that:
according to the invention, the adjacent joint rings are respectively connected in series and fixed through the cooperation of the first connecting part and the second connecting part, rivets are not needed, and the manufacturing process is simple. The connecting pair of the hinge structure formed by the first connecting part and the second connecting part does not occupy the inner cavity space of the snake bone, so that the diameter can be minimized.
Because the length of the front middle joint ring is smaller than that of the rear middle joint ring, and the maximum bending angle of the front middle joint ring is larger than that of the rear middle joint ring, the bending radius of the front section of the snake bone assembly is smaller than that of the rear section. The invention can realize the minimum bending radius of the front section and is convenient for inserting the snake bone component. In addition, the invention can realize the changeable bending radius and is convenient for controlling the bending direction of the front end.
Further, the first connecting portions 6 and the second connecting portions 7 of the same connecting end of the same joint ring are distributed in a staggered manner. The first connecting part and the second connecting part of the same connecting end of the joint ring are distributed in a different mode, so that the joint ring can relatively rotate between the two joint rings and meanwhile the connection strength between the snake bone joints is increased, and the connection between the two joint rings is reinforced.
Further, the direction N of the center line of the included angle is perpendicular to the direction W of the center axis of the snake bone component, so that the snake bone component is prevented from being disjointed when the snake bone component is bent.
Further, the maximum bending angle of the front joint ring 1 is the same as that of the front middle joint ring 2; the maximum bending angle of the rear pitch ring 4 is the same as that of the rear middle pitch ring 3.
Further, the maximum upper bending angle of the snake bone component is m x alpha + n x beta+ (alpha + beta)/2, and the maximum lower bending angle is m x epsilon + n x theta+ (epsilon + theta)/2;
wherein m is the number of front middle joint rings 2,
n is the number of the rear middle joint rings 3,
alpha is the included angle between the upper end surfaces of the adjacent two front middle joint rings 2,
beta is the included angle between the upper end surfaces of the two adjacent rear middle joint rings 3,
epsilon is the included angle between the lower end surfaces of the two adjacent front middle joint rings 2,
θ is the included angle between the lower end faces of the two adjacent rear middle joint rings 3.
Further, the first connecting portion 6 includes a meshing disc 6-1 protruding from the end face of the joint ring, a connecting ring meshing groove 6-2 is formed between one side of the meshing disc 6-1 and the end face of the joint ring, and a connecting tail 6-3 is formed at the other side of the meshing disc 6-1; the connecting ring meshing groove 6-2, the meshing circular plate 6-1 and the connecting tail 6-3 are sequentially and smoothly connected to form the first connecting part 6 of the joint ring.
Further, the second connecting part 7 comprises a circular arc-shaped engaging part 7-1 protruding out of the end face of the joint ring, the circular arc-shaped engaging part 7-1 is matched with the connecting ring engaging groove 6-2, and the length of the connecting ring engaging groove 6-2 is larger than that of the circular arc-shaped engaging part 7-1; the inward bending part of the circular arc-shaped meshing part 7-1 forms a circular connecting lug meshing groove 7-2, and the connecting lug meshing groove 7-2 is matched with the meshing circular disc 6-1; a connecting tail engagement groove 7-3 is formed at the other side of the connecting lug engagement groove 7-2, the connecting tail engagement groove 7-3 is matched with the connecting tail 6-3, and the length of the connecting tail engagement groove 7-3 is longer than that of the connecting tail 6-3; the circular arc-shaped meshing part 7-1 positioned on one of the joint rings can rotate along the connecting ring meshing groove 6-2 of the other joint ring by taking the circle center of the connecting lug meshing groove 7-2 as a rotation center; the meshing circular piece 6-1 positioned on the other joint circle can rotate relative to the connecting lug meshing groove 7-2 of one joint circle by taking the common circle center of the meshing circular piece 6-1 and the connecting lug meshing groove 7-2 as a rotation center; the connecting tail 6-3 positioned on the other section of ring can rotate along the connecting tail meshing groove 7-3 of one section of ring by taking the circle center of the meshing circular disc 6-1 as a rotation center; the circular arc-shaped engagement part 7-1, the connecting lug engagement groove 7-2 and the connecting tail engagement groove 7-3 are sequentially and smoothly connected to form a second connection part 7 of the joint ring.
The hinge structure formed by the first connecting part and the second connecting part comprises three matching parts, namely the matching of the connecting ring meshing groove and the circular arc-shaped meshing part, the matching of the meshing wafer and the connecting lug meshing groove and the matching of the connecting tail and the connecting tail meshing groove, so that the two joint rings can be relatively rotated, and meanwhile, the stable connection between the two joint rings is ensured, and the phenomenon of disconnection in the rotating process is avoided.
Further, the edge of the first connecting portion 6 forms a first chamfer; the edge of the second connecting part 7 forms a second chamfer; the direction of the first chamfer is opposite to the direction of the second chamfer. The invention can ensure that the snake bone joint is not dislocated while ensuring the bending action after the first connecting part and the second connecting part are connected in a matched way.
Further, a wire rope threading groove 5 is symmetrically formed on each front middle joint ring 2 and each rear middle joint ring 3.
Further, the method for forming the steel wire rope threading groove 5 comprises the following steps: first gap 8 and second gap 9 are formed on the joint ring in parallel by laser cutting, then the part between the first gap 8 and the second gap 9 is recessed inwards by punching, thereby forming rope threading groove 5 for fixing the traction steel wire. The steel wire rope threading groove is formed without welding, and is convenient to process.
The invention has the following technical effects:
the joint rings are made of the whole cylindrical stainless steel tube, the five-axis laser cutting technology is adopted for direct forming, the cut of the finished product is smooth, secondary polishing, deburring and other working procedures are not needed, a hinge structure is naturally formed at the connecting end, a rivet structure is not needed, welding is not needed, the processing cost is low, and the production efficiency is greatly improved.
The invention can minimize the outline dimension of the bending part, ensure the maximization of the inner cavity space, and facilitate the passage of the inner objects such as the forceps channel pipe, the light guide beam, the electric wire and the like.
Drawings
It will be appreciated by those skilled in the art that the following description is merely illustrative of the principles of the invention, which can be applied in numerous ways to implement many different alternative embodiments. These descriptions are only intended to illustrate the general principles of the teachings of the present invention and are not meant to limit the inventive concepts disclosed herein.
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the general description given above and the detailed description of the drawings given below, serve to explain the principles of the invention.
The invention is described in further detail below with reference to the drawings and the detailed description.
FIG. 1 is a schematic view of a variable bend radius rivetless snake bone assembly of the present invention for an endoscope;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is an enlarged schematic view of the present invention;
FIG. 4 is a schematic perspective view of a middle joint ring of the present invention;
FIG. 5 is an enlarged partial schematic view of the present invention;
FIG. 6 is a schematic view of a first connection portion of the present invention;
FIG. 7 is a schematic view of a second connection of the present invention;
FIG. 8 is a side view of the middle joint ring of the present invention;
FIG. 9 is a schematic cross-sectional view of a middle joint ring of the present invention;
fig. 10 is a schematic view of the bending state of the present invention.
The reference numerals in the drawings illustrate:
1 is a front section ring, 2 is a front middle section ring,
3 is a rear middle section ring, 4 is a rear section ring,
5 is a rope groove of the steel wire rope, 6 is a first connecting part,
7 is a second connecting part, 8 is a first gap,
and 9 is a second slit, and the second slit is a second slit,
6-1 is a meshing wafer, 6-2 is a connecting ring meshing groove,
6-3 is a connecting tail, and the connecting tail is a connecting tail,
7-1 is a circular arc engaging part, 7-2 is a connecting lug engaging groove,
7-3 is a connecting tail engagement groove.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. It will be apparent that the described embodiments are some, but not all, embodiments of the invention. All other embodiments, which can be made by a person skilled in the art without creative efforts, based on the described embodiments of the present invention fall within the protection scope of the present invention. Unless otherwise defined, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The terms "first," "second," and the like, as used herein, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" and the like means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof without precluding other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "front", "rear", and the like are used only to indicate a relative positional relationship, and when the absolute position of the object to be described is changed, the relative positional relationship may be changed accordingly.
As shown in fig. 1, the rivet-free snake bone component for the endoscope with the changeable bending radius comprises a front joint ring 1, m front middle joint rings 2, n rear middle joint rings 3 and a rear joint ring 4 which are connected in sequence;
as shown in fig. 4, the cross section of each joint ring is circular; the two adjacent joint rings are connected through a connecting pair of a hinge structure formed by the mutual matching of the first connecting part 6 and the second connecting part 7;
the first connecting part 6 of one joint ring can rotate relative to the second connecting part 7 of the joint ring connected with the first connecting part;
two connecting parts are symmetrically formed at the connecting end of the same joint ring; two connecting parts of the same joint ring form a rotation center, wherein one joint ring can rotate around the rotation center by an angle relative to the joint ring connected with the rotation center, so that the snake bone component is bent;
the first connecting parts 6 and the second connecting parts 7 of the same connecting end of the same joint ring are distributed in a staggered mode, so that the connection between the two joint rings can be further reinforced while the relative rotation between the two joint rings is realized.
The end surfaces between the two connecting parts form concave surfaces on two sides of the connecting parts respectively so as to form an included angle between the end surfaces of two adjacent joint rings; wherein the maximum bending angle of each section is formed by the maximum angle that one section ring can rotate relative to the section ring connected with the maximum bending angle; because the two sides of the connecting pair form included angles respectively, the snake bone component can be bent upwards or downwards;
as shown in FIG. 5, the direction N of the center line of the included angle is perpendicular to the direction W of the center axis of the snake bone component, so as to ensure that the snake bone component is not disjointed when the snake bone component is in bending motion.
As shown in fig. 3, the axial length of the front middle joint ring 2 is smaller than the axial length of the rear middle joint ring 3; a first included angle alpha is formed between the upper end surfaces of the adjacent front middle joint rings 2, and a second included angle beta is formed between the upper end surfaces of the adjacent rear middle joint rings 3; the first included angle alpha is larger than the second included angle beta, so that the maximum upper bending angle alpha of the adjacent front middle joint ring 2 is larger than the maximum upper bending angle beta of the adjacent rear middle joint ring 3, and the snake bone component realizes variable bending radius;
a third included angle epsilon is formed between the lower end surfaces of the adjacent front middle joint rings 2, and a fourth included angle theta is formed between the lower end surfaces of the adjacent rear middle joint rings 3; the third included angle epsilon is larger than the fourth included angle theta so that the maximum lower bending angle epsilon of the adjacent front middle joint ring 2 is larger than the maximum lower bending angle theta of the adjacent rear middle joint ring 3;
the first included angle alpha and the third included angle epsilon can be equal or unequal;
the second included angle beta and the fourth included angle theta can be equal or unequal;
the maximum bending angle of the front joint ring 1 is the same as that of the front middle joint ring 2, and the maximum bending angle of the rear joint ring 4 is the same as that of the rear middle joint ring 3;
the maximum upper bending angle of the snake bone component of the invention is m x alpha + n x beta+ (alpha + beta)/2, and the maximum lower bending angle is m x epsilon + n x theta+ (epsilon + theta)/2.
Since the length of the anterior-middle joint section 2 of the present invention is smaller than the length of the posterior-middle joint section 3 while the maximum bending angle α of the anterior-middle joint section 2 is greater than the maximum bending angle β of the posterior-middle joint section 3, the bending radius R1 of the anterior segment of the snake bone assembly is smaller than the bending radius R2 of the posterior segment, as shown in fig. 10.
As shown in fig. 1, the rear end of the front joint ring 1 is formed with a first connecting portion 6 and a second connecting portion 7 as connecting ends, and the first connecting portion 6 and the second connecting portion 7 are uniformly distributed along the circumferential direction of the joint ring so that the first connecting portion 6 and the second connecting portion 7 form an angle of 180 degrees; the end surfaces between the first connection part 6 and the second connection part 7 form a concave surface so that a first included angle alpha is formed between the front joint ring 1 and the end surface of the front middle joint ring 2.
As shown in fig. 1, the front end of the front middle joint 2 is formed with a first connection part 6 and a second connection part 7, and the rear end of the front middle joint 2 is formed with a second connection part 7 and a first connection part 6; the first connecting parts 6 and the second connecting parts 7 are distributed in a staggered way, namely the first connecting parts 6 at the front end and the second connecting parts 7 at the rear end are positioned on the same side of the front middle joint ring 2;
the front end of the front middle joint ring 2 is connected with a first connecting part 6 of the front joint ring 1 through a second connecting part 7, and is connected with a second connecting part 7 of the front joint ring 1 through the first connecting part 6; the rear end of the front middle joint ring 2 is connected with a second connecting part 7 at the front end of the adjacent front middle joint ring 2 through a first connecting part 6, and is connected with a first connecting part 6 at the front end of the adjacent front middle joint ring 2 through the second connecting part 7.
The rear middle joint ring 3 has the same structure as the front middle joint ring 2.
As shown in fig. 1, the front end of the rear joint ring 4 is formed with a first connecting portion 6 and a second connecting portion 7 as connecting ends, and the first connecting portion 6 and the second connecting portion 7 are uniformly distributed along the circumferential direction of the joint ring.
As shown in fig. 6, the first connecting portion 6 includes an engagement disc 6-1 protruding from the end face of the joint ring, a connecting ring engagement groove 6-2 is formed between one side of the engagement disc 6-1 and the end face of the joint ring, and a connecting tail 6-3 is formed on the other side of the engagement disc 6-1;
the connecting ring meshing groove 6-2, the meshing circular plate 6-1 and the connecting tail 6-3 are sequentially and smoothly connected to form a first connecting part 6 of the joint ring; the edge of the first connecting part 6 is cut by laser to form a first chamfer;
as shown in fig. 7, the second connecting portion 7 includes a circular arc engaging portion 7-1 protruding from an end surface of the joint ring, the circular arc engaging portion 7-1 is fitted with the connecting ring engaging groove 6-2, and the length of the connecting ring engaging groove 6-2 is longer than that of the circular arc engaging portion 7-1; the inward bending part of the circular arc-shaped meshing part 7-1 forms a circular connecting lug meshing groove 7-2, and the connecting lug meshing groove 7-2 is matched with the meshing circular disc 6-1; a connecting tail engagement groove 7-3 is formed at the other side of the connecting lug engagement groove 7-2, the connecting tail engagement groove 7-3 is matched with the connecting tail 6-3, and the length of the connecting tail engagement groove 7-3 is longer than that of the connecting tail 6-3;
the circular arc-shaped meshing part 7-1 positioned on one of the joint rings can rotate along the connecting ring meshing groove 6-2 of the other joint ring by taking the circle center of the connecting lug meshing groove 7-2 as a rotation center;
the meshing circular piece 6-1 positioned on the other joint circle can rotate relative to the connecting lug meshing groove 7-2 of one joint circle by taking the common circle center of the meshing circular piece 6-1 and the connecting lug meshing groove 7-2 as a rotation center;
the connecting tail 6-3 positioned on the other section of ring can rotate along the connecting tail meshing groove 7-3 of one section of ring by taking the circle center of the meshing circular disc 6-1 as a rotation center;
the circular arc-shaped engagement part 7-1, the connecting lug engagement groove 7-2 and the connecting tail engagement groove 7-3 are sequentially and smoothly connected to form a second connection part 7 of the joint ring; the edge of the second connecting part 7 is cut by laser to form a second chamfer;
the direction of the first chamfer is opposite to the direction of the second chamfer, so that the situation that the snake bone joint is misplaced (namely the joint ring is misplaced) can not occur when the bending action is ensured after the first connecting part 6 is matched and connected with the second connecting part 7. If the outer diameter of the joint ring part of the connecting lug 6 is larger than the inner diameter, and the size difference is d, the outer diameter of the corresponding joint ring part of the connecting ring 7 is smaller than the inner diameter, and the size difference is d.
The hinge structure formed by the first connecting part 6 and the second connecting part 7 comprises three matching parts, namely the matching of the connecting ring meshing groove 6-2 and the circular arc-shaped meshing part 7-1, the matching of the meshing wafer 6-1 and the connecting lug meshing groove 7-2 and the matching of the connecting tail 6-3 and the connecting tail meshing groove 7-3, so that the two joint rings can be relatively rotated, stable connection between the two joint rings is ensured, and the phenomenon of disconnection in the rotating process is avoided.
As shown in fig. 2, a wire rope threading groove 5 is symmetrically formed on each of the front middle joint ring 2 and the rear middle joint ring 3. During manufacturing, a first gap 8 and a second gap 9 are formed on the front middle joint ring 2 and the rear middle joint ring 3 in parallel in a laser cutting mode, and then a part between the first gap 8 and the second gap 9 is recessed inwards in a punching mode, so that a rope threading groove 5 for fixing a traction steel wire is formed, as shown in fig. 8 and 9. The wire rope threading groove 5 is formed without welding, so that the processing is convenient.
The invention is suitable for medical soft endoscopes and industrial soft endoscopes, in particular for small-diameter endoscopes.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (9)
1. A variable radius bending endoscope rivetless snake bone assembly which is characterized in that: comprises a front joint ring (1), m front middle joint rings (2), n rear middle joint rings (3) and a rear joint ring (4) which are connected in sequence; the two adjacent joint rings are connected through a connecting pair of a hinge structure formed by the mutual matching of the first connecting part (6) and the second connecting part (7); wherein the first connection part (6) of one joint ring can rotate relative to the second connection part (7) of the joint ring connected with the first connection part;
two connecting parts are symmetrically formed at the connecting end of the same joint ring; two connecting parts of the same joint ring form a rotation center, wherein one joint ring can rotate around the rotation center by an angle relative to the joint ring connected with the rotation center, so that the snake bone component is bent;
the end surfaces between the two connecting parts form concave surfaces on two sides of the connecting parts respectively so as to form an included angle between the end surfaces of two adjacent joint rings; wherein the maximum bending angle of each section is formed by the maximum angle that one section ring can rotate relative to the section ring connected with the maximum bending angle;
the length of the front middle joint ring (2) is smaller than that of the rear middle joint ring (3); a first included angle (alpha) is formed between the upper end surfaces of the adjacent front middle joint rings (2), and a second included angle (beta) is formed between the upper end surfaces of the adjacent rear middle joint rings (3); the first included angle (alpha) is larger than the second included angle (beta) so that the maximum upper bending angle (alpha) of the adjacent front middle joint ring (2) is larger than the maximum upper bending angle (beta) of the adjacent rear middle joint ring (3), and therefore the snake bone component realizes the variable upper bending radius; a third included angle (epsilon) is formed between the lower end surfaces of the adjacent front middle joint rings (2), and a fourth included angle (theta) is formed between the lower end surfaces of the adjacent rear middle joint rings (3); the third included angle (epsilon) is larger than the fourth included angle (theta), so that the maximum lower bending angle (epsilon) of the adjacent front middle joint ring (2) is larger than the maximum lower bending angle (theta) of the adjacent rear middle joint ring (3), and the snake bone component realizes the variable lower bending radius;
the first connecting part (6) comprises a meshing wafer (6-1) protruding out of the end face of the joint ring, a connecting ring meshing groove (6-2) is formed between one side of the meshing wafer (6-1) and the end face of the joint ring, and a connecting tail (6-3) is formed at the other side of the meshing wafer (6-1); the connecting ring meshing groove (6-2), the meshing wafer (6-1) and the connecting tail (6-3) are sequentially and smoothly connected to form the first connecting part (6) of the joint ring.
2. A variable bend radius rivetless snake bone assembly as claimed in claim 1, wherein: the first connecting parts (6) and the second connecting parts (7) of the same connecting end of the same joint ring are distributed in a staggered way.
3. A variable bend radius rivetless snake bone assembly as claimed in claim 1, wherein: the direction (N) of the central line of the included angle is perpendicular to the central axis direction (W) of the snake bone component.
4. A variable bend radius rivetless snake bone assembly as claimed in claim 1, wherein: the maximum bending angle of the front joint ring (1) is the same as that of the front middle joint ring (2); the maximum bending angle of the rear joint ring (4) is the same as that of the rear middle joint ring (3).
5. A variable bend radius rivetless snake bone assembly as claimed in claim 1, wherein: the maximum upper bending angle of the snake bone component is m multiplied by alpha plus n multiplied by beta plus (alpha plus beta)/2, and the maximum lower bending angle is m multiplied by epsilon plus n multiplied by theta plus (epsilon plus theta)/2;
wherein m is the number of front middle joint rings (2),
n is the number of rear middle joint rings (3),
alpha is the included angle between the upper end surfaces of the two adjacent front middle joint rings (2),
beta is the included angle between the upper end surfaces of the two adjacent rear middle joint rings (3),
epsilon is the included angle between the lower end surfaces of the two adjacent front middle joint rings (2),
θ is the included angle between the lower end faces of the two adjacent rear middle joint rings (3).
6. A variable bend radius rivetless snake bone assembly as claimed in claim 1, wherein: the second connecting part (7) comprises a circular arc-shaped meshing part (7-1) protruding out of the end face of the joint ring, the circular arc-shaped meshing part (7-1) is matched with the connecting ring meshing groove (6-2), and the length of the connecting ring meshing groove (6-2) is longer than that of the circular arc-shaped meshing part (7-1); the inward bending part of the circular arc-shaped meshing part (7-1) forms a circular connecting lug meshing groove (7-2), and the connecting lug meshing groove (7-2) is matched with the meshing wafer (6-1); a connecting tail engagement groove (7-3) is formed at the other side of the connecting lug engagement groove (7-2), the connecting tail engagement groove (7-3) is matched with the connecting tail (6-3), and the length of the connecting tail engagement groove (7-3) is larger than that of the connecting tail (6-3);
the circular arc-shaped meshing part (7-1) positioned on one of the joint rings can rotate along the connecting ring meshing groove (6-2) of the other joint ring by taking the circle center of the connecting lug meshing groove (7-2) as a rotation center; the meshing circular plate (6-1) positioned on the other section circle can rotate relative to the connecting lug meshing groove (7-2) of one section circle by taking the common circle center of the meshing circular plate (6-1) and the connecting lug meshing groove (7-2) as a rotation center; the connecting tail (6-3) positioned on the other section of ring can rotate along the connecting tail meshing groove (7-3) of one section of ring by taking the circle center of the meshing circular disc (6-1) as a rotation center;
the circular arc-shaped engagement part (7-1), the connecting lug engagement groove (7-2) and the connecting tail engagement groove (7-3) are sequentially and smoothly connected to form a second connection part (7) of the joint ring.
7. A variable bend radius rivetless snake bone assembly as claimed in claim 1, wherein: the edge of the first connecting part (6) forms a first chamfer; the edge of the second connecting part (7) forms a second chamfer; the direction of the first chamfer is opposite to the direction of the second chamfer.
8. A variable bend radius rivetless snake bone assembly as claimed in claim 1, wherein: and steel wire rope threading grooves (5) are symmetrically formed on each front middle joint ring (2) and each rear middle joint ring (3).
9. The variable bend radius endoscope rivetless snake bone assembly of claim 8 wherein: the method for forming the steel wire rope threading groove (5) comprises the following steps: first slits (8) and second slits (9) are formed on the joint rings in parallel in a laser cutting mode, and then the positions between the first slits (8) and the second slits (9) are recessed inwards in a stamping mode, so that a wire rope threading groove (5) for fixing the traction wire is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810017292.8A CN108125665B (en) | 2018-01-09 | 2018-01-09 | Rivet-free snake bone component with changeable bending radius for endoscope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810017292.8A CN108125665B (en) | 2018-01-09 | 2018-01-09 | Rivet-free snake bone component with changeable bending radius for endoscope |
Publications (2)
| Publication Number | Publication Date |
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| CN108125665A CN108125665A (en) | 2018-06-08 |
| CN108125665B true CN108125665B (en) | 2024-02-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810017292.8A Active CN108125665B (en) | 2018-01-09 | 2018-01-09 | Rivet-free snake bone component with changeable bending radius for endoscope |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108577789A (en) * | 2018-05-17 | 2018-09-28 | 上海安清医疗器械有限公司 | Endoscope |
| CN109497915B (en) * | 2018-12-25 | 2024-03-22 | 深圳市先赞科技有限公司 | Bending part of endoscope and endoscope |
| CN109645937B (en) * | 2018-12-25 | 2024-03-22 | 深圳市先赞科技有限公司 | Bending part of endoscope and endoscope |
| CN109512369B (en) * | 2018-12-25 | 2023-12-05 | 深圳市先赞科技有限公司 | Bending part of endoscope and endoscope |
| CN110018562B (en) * | 2019-04-03 | 2024-07-19 | 岱川医疗(深圳)有限责任公司 | Bending part of endoscope and endoscope |
| CN111700578B (en) * | 2020-07-13 | 2024-08-16 | 中科光电(北京)智能科技有限公司 | Endoscope bending part |
| CN112022060A (en) * | 2020-09-18 | 2020-12-04 | 鑫圻科技股份有限公司 | Snake bone structure and endoscope device |
| CN112294237B (en) * | 2020-10-23 | 2022-12-30 | 新光维医疗科技(苏州)股份有限公司 | Snake bone connecting structure for endoscope |
| CN214906586U (en) * | 2021-01-07 | 2021-11-30 | 上海视介光电科技有限公司 | Endoscope bending tube |
| CN113576378B (en) * | 2021-08-11 | 2024-07-05 | 岱川医疗(深圳)有限责任公司 | Bending structure of endoscope |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE687988A (en) * | 1965-10-08 | 1967-03-16 | ||
| CN201469245U (en) * | 2009-08-14 | 2010-05-19 | 上海澳华光电内窥镜有限公司 | Endoscope snake bone |
| CN204618174U (en) * | 2015-04-28 | 2015-09-09 | 常州延顺光电科技有限公司 | The middle pitch circle structure of snake bone |
| CN107334449A (en) * | 2017-07-11 | 2017-11-10 | 上海成运医疗器械股份有限公司 | Endoscope-use is without rivet snake bone component |
| CN107468201A (en) * | 2017-07-21 | 2017-12-15 | 安徽航天生物科技股份有限公司 | A kind of snake bone of endoscope |
| CN108113628A (en) * | 2018-01-09 | 2018-06-05 | 浙江成运医疗器械有限公司 | Without rivet snake bone component |
| CN208464025U (en) * | 2018-01-09 | 2019-02-05 | 浙江成运医疗器械有限公司 | Without rivet snake bone component |
| CN208677340U (en) * | 2018-01-09 | 2019-04-02 | 浙江成运医疗器械有限公司 | The variable endoscope-use of bending radius is without rivet snake bone component |
-
2018
- 2018-01-09 CN CN201810017292.8A patent/CN108125665B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE687988A (en) * | 1965-10-08 | 1967-03-16 | ||
| CN201469245U (en) * | 2009-08-14 | 2010-05-19 | 上海澳华光电内窥镜有限公司 | Endoscope snake bone |
| CN204618174U (en) * | 2015-04-28 | 2015-09-09 | 常州延顺光电科技有限公司 | The middle pitch circle structure of snake bone |
| CN107334449A (en) * | 2017-07-11 | 2017-11-10 | 上海成运医疗器械股份有限公司 | Endoscope-use is without rivet snake bone component |
| CN107468201A (en) * | 2017-07-21 | 2017-12-15 | 安徽航天生物科技股份有限公司 | A kind of snake bone of endoscope |
| CN108113628A (en) * | 2018-01-09 | 2018-06-05 | 浙江成运医疗器械有限公司 | Without rivet snake bone component |
| CN208464025U (en) * | 2018-01-09 | 2019-02-05 | 浙江成运医疗器械有限公司 | Without rivet snake bone component |
| CN208677340U (en) * | 2018-01-09 | 2019-04-02 | 浙江成运医疗器械有限公司 | The variable endoscope-use of bending radius is without rivet snake bone component |
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