CN111134598A - Snake bone assembly for controlling bending angle of endoscope - Google Patents
Snake bone assembly for controlling bending angle of endoscope Download PDFInfo
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- CN111134598A CN111134598A CN202010097022.XA CN202010097022A CN111134598A CN 111134598 A CN111134598 A CN 111134598A CN 202010097022 A CN202010097022 A CN 202010097022A CN 111134598 A CN111134598 A CN 111134598A
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- 241000270295 Serpentes Species 0.000 title claims abstract description 190
- 210000000988 bone and bone Anatomy 0.000 title claims abstract description 190
- 238000005452 bending Methods 0.000 title claims abstract description 54
- 230000000295 complement effect Effects 0.000 claims abstract description 5
- 210000001503 joint Anatomy 0.000 claims description 11
- 238000001574 biopsy Methods 0.000 abstract description 33
- 239000000463 material Substances 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 239000000835 fiber Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 238000001746 injection moulding Methods 0.000 description 5
- 238000003780 insertion Methods 0.000 description 4
- 230000037431 insertion Effects 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- WYTGDNHDOZPMIW-RCBQFDQVSA-N alstonine Natural products C1=CC2=C3C=CC=CC3=NC2=C2N1C[C@H]1[C@H](C)OC=C(C(=O)OC)[C@H]1C2 WYTGDNHDOZPMIW-RCBQFDQVSA-N 0.000 description 3
- 238000003698 laser cutting Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 239000003365 glass fiber Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000002380 cytological effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 238000010827 pathological analysis Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 210000001519 tissue Anatomy 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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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
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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
- A61B1/008—Articulations
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B10/00—Other methods or instruments for diagnosis, e.g. instruments for taking a cell sample, for biopsy, for vaccination diagnosis; Sex determination; Ovulation-period determination; Throat striking implements
- A61B10/02—Instruments for taking cell samples or for biopsy
- A61B10/04—Endoscopic instruments
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Abstract
The invention discloses a snake bone component for controlling the bending angle of an endoscope, which comprises a plurality of snake bone intermediate sections which are connected in sequence; the end surface between the connecting lugs at one end of the middle snake bone section forms a lateral inclined surface, the lateral inclined surface and the axial direction of the middle snake bone section form a rotation included angle, and the rotation included angle and the maximum bending angle of the adjacent middle snake bone section form a complementary angle relationship; an inner chamfer is formed on the inner wall of the end surface of the middle section of the snake bone. The invention utilizes the hollow part of the snake bone component to place the forceps channel pipe, and the inner wall of the end surface of the snake bone joint is provided with the inner chamfer, so that even if the snake bone component reaches the maximum bending angle, the inner wall of the adjacent snake bone joints can not generate the broken angle to extrude the outer wall of the forceps channel pipe, thereby causing the problems of small inner space of the forceps channel pipe and easy damage, and simultaneously being convenient for the biopsy forceps to smoothly extend into the biopsy forceps channel.
Description
Technical Field
The invention relates to a medical instrument, in particular to a snake bone component for controlling the bending angle of an endoscope.
Background
According to the traditional reusable endoscope, the snake bone sections of the bent snake bone components of the endoscope are usually manufactured by adopting metal thin-wall pipes through a laser or wire cutting process, and the connection between the snake bone sections is fixed through riveting and wire-through hole elements through rivet welding. In order to save cost, the disposable endoscope is usually made of plastic materials through an injection molding process or a thin-wall stainless steel tube through an integral laser cutting process. The snake bone joint made of plastic is adopted, and in order to keep enough hardness, not only hard materials are required to be adopted for injection molding, but also a certain thickness is required to be kept; in the process of medical operation, the problem that the joints between the snake bone joints are loosened due to the action of certain external force often occurs to the snake bone component which is made of the thin-wall stainless steel tube through the integral laser cutting process.
In contrast, the snake bone component made of plastic materials is superior to the snake bone component manufactured by a laser cutting process in connection reliability, but has the problem of wall thickness. The steel wire rope threading hole of the snake bone component made of plastic materials is usually positioned in the middle of a wall thickness layer between the inner diameter and the outer diameter of the snake bone, so that the manufacturing process that a metal snake bone joint needs to be riveted or welded with a rope threading hole ring is omitted. In addition, the snake bone section hinge connection structure made of plastic adopts a mode that the rotating shaft is inserted into the shaft sleeve, and the snake bone section is made of plastic, so that the snake bone section hinge connection structure is tough after injection molding, and the snake bone section hinge connection structure is very easy to connect and install. The two points are the advantages of injection molding of the snake bone by adopting a plastic material. The snake bone component made of plastic material used by the endoscope has the advantages of good economy and high cost performance.
Generally, for medical endoscopes, it is required that an instrument whose bending portion passes through a biopsy forceps channel (working channel) when bending can maintain smooth and smooth operability to perform a specific biopsy or treatment work. Therefore, the bending control snake bone component of the medical endoscope is required to have good bending form so as to ensure that the biopsy forceps channel (working channel) in the snake bone component has good moving space and smoothness and good bending form, so that the biopsy forceps channel (working channel) does not bend, and the smoothness and smoothness of the instrument during use are ensured.
In addition, the inner space of the snake bone component is used for passing through a signal cable, a light guide glass fiber bundle, a clamping pipe, a water vapor pipe and the like. The snake bone assembly is bent repeatedly for multiple times, and the phenomenon of mutual winding can occur, so that the internal space of the snake bone assembly is reduced, the bending operation is difficult or the bending angle is insufficient, and the fault of twisting off of a fine cable in the small-diameter endoscope can be caused in serious conditions.
Medical endoscopes often need to be enlarged as much as possible while maintaining a small diameter of the insertion tube in order to grasp larger tissues with larger-sized biopsy forceps, thereby providing a reliable basis for cytological and pathological diagnosis. Therefore, for the snake bone component made of plastic, the contradiction between the diameter of the biopsy forceps working channel pipe and the wall thickness of the snake bone component made of plastic, and the phenomena that the signal cable, the light guide glass fiber bundle, the forceps channel pipe and the water vapor pipe are different in material and hardness, and are mutually wound after the snake bone component is repeatedly bent for many times need to be solved. This is particularly important in endoscopes having a small outer diameter of 6mm or less.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a snake bone component for controlling the bending angle of an endoscope, which can improve the smoothness of the inner wall of a snake bone when the snake bone component is bent at a large angle.
In order to solve the technical problems, the technical solution of the snake bone component for controlling the bending angle of the endoscope of the invention is as follows:
comprises a plurality of snake bone middle sections which are connected in sequence; the end surface between the connecting lugs at one end of the middle snake bone section forms a lateral inclined surface, the lateral inclined surface and the axial direction of the middle snake bone section form a rotation included angle, and the rotation included angle and the maximum bending angle of the adjacent middle snake bone section form a complementary angle relationship; an inner chamfer is formed on the inner wall of the end surface of the middle section of the snake bone.
In another embodiment, the angle of the inner chamfer is proportional to the maximum bending angle of the adjacent middle segment of the snake bone.
In another embodiment, the angle of the inner chamfer is proportional to the length of the middle segment of the single snake bone.
In another embodiment, the angle of the inner chamfer is proportional to the number of nodes of the middle section of the snake bone.
In another embodiment, a plurality of axially extending accommodating grooves are circumferentially distributed on the side wall of the inner hole of the middle snake bone joint.
In another embodiment, the diameter of the accommodating groove is matched with the diameter of the functional wire to be accommodated.
In another embodiment, the width of the opening of the receiving groove in the inner hole of the condyle is smaller than the diameter of the receiving groove.
In another embodiment, two ends of the middle section of the snake bone are respectively provided with two oppositely arranged connecting lugs, one end of each connecting lug is a male connecting lug, and the other end of each connecting lug is a female connecting lug; the rotating shaft of the male connecting lug is matched with the shaft hole of the female connecting lug, and the movable connection between the adjacent middle sections of the snake bones is realized through the connection of the male connecting lug and the female connecting lug.
In another embodiment, the back end of the snake bone component is connected with the snake bone tail section, the end surface between the connecting lugs of the connecting end of the middle section of the snake bone tail section forms a lateral inclined surface, the lateral inclined surface and the axial direction of the snake bone tail section form a rotation included angle, and the rotation included angle and the maximum bending angle of the adjacent snake bone middle section are in a complementary angle relationship; an inner chamfer is formed on the inner wall of the end face of the snake bone tail section.
In another embodiment, the front end of the snake bone component is connected with the first snake bone section, and the end surfaces between the connecting lugs at the two ends of the first snake bone section form a straight surface.
The invention can achieve the technical effects that:
the invention utilizes the hollow part of the snake bone component to place the forceps channel pipe, and the inner wall of the end surface of the snake bone joint is provided with the inner chamfer, so that even if the snake bone component reaches the maximum bending angle, the inner wall of the adjacent snake bone joints can not generate the broken angle to extrude the outer wall of the forceps channel pipe, thereby causing the problems of small inner space of the forceps channel pipe and easy damage, and simultaneously being convenient for the biopsy forceps to smoothly extend into the biopsy forceps channel.
The invention can make the external diameter of the forceps tube as large as possible, and can avoid the extrusion of the snake bone joint to the forceps tube in the bending process only by leaving a small gap between the internal diameter of the snake bone component and the forceps tube, so the invention can realize the external diameter minimization of the endoscope on the premise of ensuring that the biopsy forceps have enough moving space.
The snake bone component is provided with four containing grooves at the hollow part, and functional wires such as signal cables, air pipes, optical fiber bundles and the like are respectively placed in the four containing grooves. Because the opening width of the accommodating groove in the inner hole of the rib section is smaller than the diameter of the accommodating groove, a signal cable, an air-water pipe, a light guide fiber bundle and the like placed in the groove are not easy to leave the accommodating groove to enter the inner hole of the rib section when the snake bone component is bent to cause a winding phenomenon with the clamp pipe, thereby solving the problem that the operation performance of each pipe, wire and light guide fiber in the inner space of the snake bone component is influenced by the winding, and avoiding the generation of faults.
The invention can keep the endoscope with the small diameter of less than 6mm in good controllability, and can still ensure the good smoothness of the inner wall of the forceps channel pipe when the snake bone component is bent to the maximum extent, thereby facilitating the control of the biopsy forceps.
Drawings
It is to be understood by those skilled in the art that the following description is only exemplary of the principles of the present invention, which may be applied in numerous ways to achieve many different alternative embodiments. These descriptions are made for the purpose of illustrating the general principles of the present teachings 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 following figures and detailed description:
FIG. 1 is a schematic view of a snake bone assembly of the present invention for controlling the bending angle of an endoscope;
FIG. 2 is an exploded schematic view of the present invention;
FIG. 3 is a perspective view of the middle section of the snake bone of the present invention;
FIG. 4 is a perspective view of another angle of the middle snake bone segment of the present invention;
FIG. 5 is a side schematic view of the middle section of the snake bone of the present invention;
FIG. 6 is a schematic view of the present invention in a bent state;
FIG. 7 is a schematic view showing a state in which a snake bone component of the prior art is bent, in which the upper half of a part of a snake bone segment is cut away to show the state of the inner wall of the bent side of the snake bone segment, and a break angle is formed between the adjacent snake bone segments;
FIG. 8 is a schematic view showing a bent state of the present invention, in which the upper half of a portion of a serpentine segment is cut away to show the state of the inner wall of the bent side of the serpentine segment, in which there is no break angle between adjacent serpentine segments;
FIG. 9 is a schematic view of the snake bone stump of the present invention;
FIG. 10 is a schematic cross-sectional view of the middle section of a snake bone of the present invention;
fig. 11 is a schematic cross-sectional view of the bent state of the present invention.
The reference numbers in the figures illustrate:
1 is the tip part of the endoscope, 2 is the tip part cylinder,
3 is the first section of the snake bone, 4 is the middle section of the snake bone,
5 is a snake bone caudal knot, 6 is an insertion tube connecting sleeve,
4-1 is a female connecting lug, 4-2 is a shaft hole,
4-3 is a male connecting lug, 4-4 is a rotating shaft,
4-5 are lateral inclined planes, 4-6 are inner chamfers,
4-7 are rope-threading holes, 4-8 are holding grooves,
4-61 is the outer edge of the inner chamfer, 4-62 is the inner edge of the inner chamfer,
10 is biopsy forceps channel.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention. Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. As used herein, the terms "first," "second," and the like, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" and similar words are intended to mean that the elements or items listed before the word cover the elements or items listed after the word and their equivalents, without excluding other elements or items. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
As shown in fig. 1 and 2, the snake bone component for controlling the bending angle of the endoscope comprises a plurality of snake bone intermediate sections 4 which are connected in sequence, and a snake bone head section 3 and a snake bone tail section 5 which are respectively arranged at two ends of the snake bone component, wherein the structure of each snake bone intermediate section 4 is the same, so that the cost of manufacturing a mold is saved; the first segment 3 of the snake bone is connected with the front end part 1 of the endoscope through the front end part cylinder 2; the snake tail joint 5 is connected with an insertion tube connecting sleeve 6.
As shown in fig. 3, two ends of the middle section 4 of the snake bone form two oppositely arranged connection lugs respectively, one end is a male connection lug 4-3, and the other end is a female connection lug 4-1; a rotating shaft 4-4 is formed on the outer side of the male connecting lug 4-3, and the rotating shafts 4-4 of the two male connecting lugs 4-3 are coaxially arranged to form a rotating center at one end of the middle section 4 of the snake bone; the female connecting lug 4-1 is provided with a shaft hole 4-2, and the shaft hole 4-2 is matched with the rotating shaft 4-4; the shaft holes 4-2 of the two female connecting lugs 4-1 are coaxially arranged to form a rotation center at the other end of the middle section 4 of the snake bone; the rotating shaft 4-4 of the middle snake bone section 4 can penetrate through the shaft hole 4-2 of the adjacent middle snake bone section 4, so that the movable connection of the adjacent middle snake bone sections 4 is realized through the connection of the male connecting lug 4-3 and the female connecting lug 4-1;
the snake bone middle section 4 is connected with the snake bone first section 3 and the snake bone tail section 5 in the same way, and one end of the snake bone first section 3 and one end of the snake bone tail section 5 form a connecting lug matched with the adjacent snake bone middle section 4.
As shown in fig. 4 and 5, the end surface between the connection lugs at one end of the snake bone middle joint 4 forms a lateral inclined surface 4-5, the lateral inclined surface 4-5 forms a rotation included angle α 1 with the axial direction of the snake bone, and then the maximum bending angle α 2 of the adjacent snake bone middle joint 4 is 90- α 1, as shown in fig. 6;
four containing grooves 4-8 extending along the axial direction are distributed on the side wall of the inner hole of the middle section 4 of the snake bone along the circumferential direction; the pipe wall of the middle section 4 of the snake bone is provided with stringing holes 4-7 which extend along the axial direction.
The end surface between the connection lugs at one end of the snake bone joint (namely the snake bone middle joint 4, the snake bone tail joint 5 or the snake bone head joint 3) is provided with a lateral inclined surface 4-5, when one steel wire rope in the snake bone is pulled, the snake bone can be bent towards the side where the steel wire rope is located, and the maximum bending angle is multiplied by α 2 times the number of the snake bone joints.
Of course, the included angles α 1 formed by the two lateral slopes 4-5 may not be equal, and the maximum upward bending angle and the maximum small bending angle of the middle segment 4 of the adjacent snake bone are not equal, so that the maximum upward bending angle and the maximum small bending angle of the snake bone are not equal.
The inner wall of the end surface between the connecting lugs at one end of the middle section 4 of the snake bone is also provided with an inner chamfer 4-6.
The inner edge of the end face between the connecting lugs of the snake bone joint is provided with an inner chamfer 4-6, when the snake bone component bends greatly, the adjacent snake bone joints do not have the state of edge angulation, so the problem that the edge angulation of the snake bone joint connecting part extrudes the outer wall of a clamping pipe (namely a working channel) is avoided.
In the process of bending the snake bone, when adjacent snake bone segments are contacted at the bending side, the maximum bending angle of the snake bone segments is obtained; as shown in fig. 7, the maximum bending angle of the snake bone segments when the end surfaces of adjacent snake bone segments intersect at line a; however, when the snake bone reaches this maximum bending angle, a break angle is formed between the end surfaces of adjacent snake bone segments, and the presence of this break angle presses the outer wall of the clip tube, which also forms a break angle in the clip tube, and this local internal space of the clip tube becomes smaller and is easily damaged. Meanwhile, when the biopsy forceps extend into the biopsy forceps channel, the folded angle can block the biopsy forceps and prevent the biopsy forceps from smoothly extending into the biopsy forceps channel. This problem is not evident with large diameter endoscopes, but is evident with small outer diameters below 6 mm. This is because when the diameter (i.e. the outer diameter) of the endoscope is less than 6mm, the forceps channel tube is required to be as large as possible to ensure that the biopsy forceps have enough movement space, so that the clearance between the inner diameter R of the endoscope and the outer wall of the forceps channel tube is very small (only 0.15mm), and the break angle of the biopsy channel can prevent the biopsy forceps from extending inwards.
The inner chamfer angles 4-6 are formed on the inner edges of the end surfaces of the snake bone joints, when the snake bone reaches the maximum bending angle, the outer edge 4-61 of the inner chamfer angle 4-6 of one snake bone joint is contacted with the adjacent snake bone joint, and the inner edge 4-62 (positioned on the biopsy forceps channel side) of the inner chamfer angle 4-6 is not contacted with the adjacent snake bone joint, but forms a gap B on the biopsy forceps channel side, as shown in figure 8; therefore, when the snake bone reaches the maximum bending angle, the inner wall of the snake bone component does not form a break angle, so that the forceps channel pipe is not squeezed, and the biopsy forceps can smoothly extend into the biopsy forceps channel.
The angle of the inner chamfer 4-6 (namely the acute angle formed by the edge of the chamfer and the axial direction of the snake bone joint) is in direct proportion to the maximum bending angle of the snake bone component, the length of a single snake bone and the number of joints of the snake bone;
the invention can prevent the edge from being angled between the adjacent snake bone segments even when the snake bone is bent greatly, thereby avoiding the problem that the angled edge of the snake bone segment connecting part presses the outer wall of the forceps channel (working channel), and the biopsy forceps can still extend into the biopsy forceps channel smoothly.
As shown in fig. 9, since the snake bone head section 3 and the adjacent snake bone intermediate section do not have a large-angle bending form, the end surface between the two connection lugs of the snake bone head section 3 does not need to be an inclined surface, and therefore, the end surface between the two connection lugs of the snake bone head section 3 is a straight surface, so that the end surface between the two connection lugs forms a right angle with the axial direction of the snake bone.
As shown in fig. 10, the middle snake bone section 4, the first snake bone section 3 and the tail snake bone section 5 of the snake bone have the same cross-sectional structure, the inner hole and the outer circle are concentrically arranged, the inner hole of the bone section is provided with four containing grooves 4-8, and the four containing grooves 4-8 are uniformly distributed along the circumference; the four accommodating grooves 4-8 are respectively used for accommodating signal cables, gas-water pipes, light guide fiber bundles and the like, so that different wires are isolated;
the diameter of the accommodating groove 4-8 is matched with the diameters of the signal cable, the air-water pipe and the light guide fiber bundle, and the opening width H of the accommodating groove 4-8 in the inner hole of the joint is smaller than the diameter of the accommodating groove 4-8; when the signal cable, the air-water pipe and the light guide fiber bundle are respectively arranged in the containing grooves 4-8 in a penetrating way, the diameter of the signal cable, the air-water pipe and the light guide fiber bundle is larger than the opening of the containing groove 4-8, so that the signal cable, the air-water pipe and the light guide fiber bundle in the containing groove 4-8 cannot easily run out of the opening of the containing groove 4-8, and cannot be wound with the clamp channel pipe during the bending operation of the snake bone assembly, thereby avoiding the generation of faults and improving the operation smoothness when the tip part of the endoscope operation insertion pipe is bent.
The snake bone component is more round and smooth in bending form, the biopsy forceps channel (working channel) in the snake bone component can also keep round and smooth in bending state, so that the biopsy forceps channel (working channel) is prevented from being bent, and smooth operation of instruments passing through the biopsy forceps channel (working channel) is guaranteed.
As shown in FIG. 11, the snake bone assembly of the present invention has a smooth inner wall of the biopsy channel 10 at the maximum bending angle, so that the biopsy forceps can smoothly extend into the biopsy channel.
The present invention is suitable for medical flexible endoscopes and industrial flexible endoscopes, and is particularly suitable for small-diameter endoscopes having a diameter of 6mm or less.
The invention can be manufactured by adopting a plastic material injection molding process, and is particularly suitable for a disposable endoscope.
It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.
Claims (10)
1. A snake bone component for controlling the bending angle of an endoscope is characterized by comprising a plurality of snake bone middle sections which are connected in sequence; the end surface between the connecting lugs at one end of the middle snake bone section forms a lateral inclined surface, the lateral inclined surface and the axial direction of the middle snake bone section form a rotation included angle, and the rotation included angle and the maximum bending angle of the adjacent middle snake bone section form a complementary angle relationship; an inner chamfer is formed on the inner wall of the end surface of the middle section of the snake bone.
2. A snake bone assembly for controlling the bending angle of an endoscope, according to claim 1, wherein the angle of said inner chamfer is proportional to the maximum bending angle of the intermediate segment of the adjacent snake bone.
3. A snake bone assembly for controlling the bending angle of an endoscope according to claim 1 or 2, wherein the angle of said inner chamfer is proportional to the length of the middle segment of a single snake bone.
4. A snake bone assembly for controlling the bending angle of an endoscope, according to claim 1 or 2, wherein the angle of said inner chamfer is proportional to the number of nodes of the middle segment of the snake bone.
5. The snake bone assembly for controlling the bending angle of an endoscope according to claim 1, wherein the inner bore side wall of the middle segment of the snake bone is circumferentially distributed with a plurality of axially extending receiving grooves.
6. A snake bone assembly for controlling the bending angle of an endoscope according to claim 5, wherein the diameter of said receiving slot matches the diameter of the functional wire to be received.
7. A snake bone assembly for controlling the bending angle of an endoscope, according to claim 5 or 6, wherein the opening width of said receiving slot in the internal hole of the condyle is smaller than the diameter of the receiving slot.
8. The snake bone assembly for controlling the bending angle of an endoscope, according to claim 1, wherein two opposite connecting lugs are formed at two ends of the middle section of the snake bone, one end of the middle section of the snake bone is a male connecting lug, and the other end of the middle section of the snake bone is a female connecting lug; the rotating shaft of the male connecting lug is matched with the shaft hole of the female connecting lug, and the movable connection between the adjacent middle sections of the snake bones is realized through the connection of the male connecting lug and the female connecting lug.
9. The snake bone assembly for controlling the bending angle of an endoscope, according to claim 1, wherein the snake bone assembly is connected with the snake bone caudal joint at the rear end thereof, the end surface between the connection lugs of the connection end of the middle joint of the snake bone caudal joint forms a lateral inclined surface, the lateral inclined surface and the axial direction of the snake bone caudal joint form a rotation included angle, and the rotation included angle and the maximum bending angle of the adjacent snake bone caudal joint are in a complementary angle relationship; an inner chamfer is formed on the inner wall of the end face of the snake bone tail section.
10. The snake bone assembly for controlling the bending angle of an endoscope, according to claim 1 or 9, wherein the front end of the snake bone assembly is connected with a snake bone first section, and the end surface between the connection lugs at the two ends of the snake bone first section forms a straight surface.
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| CN202010097022.XA CN111134598A (en) | 2020-02-17 | 2020-02-17 | Snake bone assembly for controlling bending angle of endoscope |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112294236A (en) * | 2020-10-14 | 2021-02-02 | 北京大学 | Endoscope front end bending part form detection system and detection method thereof |
| CN113827169A (en) * | 2021-09-23 | 2021-12-24 | 湖南省华芯医疗器械有限公司 | Snake bone unit, snake bone assembly, insertion part, endoscope and connecting method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101381678B1 (en) * | 2013-12-17 | 2014-04-07 | 한기철 | Endoscope |
| CN104714295A (en) * | 2013-12-15 | 2015-06-17 | 郑州新力光电技术有限公司 | Four-way snake bone and assembling method thereof |
| WO2018177040A1 (en) * | 2017-03-30 | 2018-10-04 | 微创（上海）医疗机器人有限公司 | Snake-like joint for surgical robot, surgical instrument, and endoscope |
| CN211985343U (en) * | 2020-02-17 | 2020-11-24 | 聚品(上海)生物科技有限公司 | Snake bone assembly for controlling bending angle of endoscope |
| CN212186445U (en) * | 2020-02-17 | 2020-12-22 | 聚品(上海)生物科技有限公司 | Snake bone assembly for controlling bending angle of endoscope |
-
2020
- 2020-02-17 CN CN202010097022.XA patent/CN111134598A/en not_active Withdrawn
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104714295A (en) * | 2013-12-15 | 2015-06-17 | 郑州新力光电技术有限公司 | Four-way snake bone and assembling method thereof |
| KR101381678B1 (en) * | 2013-12-17 | 2014-04-07 | 한기철 | Endoscope |
| WO2018177040A1 (en) * | 2017-03-30 | 2018-10-04 | 微创（上海）医疗机器人有限公司 | Snake-like joint for surgical robot, surgical instrument, and endoscope |
| CN211985343U (en) * | 2020-02-17 | 2020-11-24 | 聚品(上海)生物科技有限公司 | Snake bone assembly for controlling bending angle of endoscope |
| CN212186445U (en) * | 2020-02-17 | 2020-12-22 | 聚品(上海)生物科技有限公司 | Snake bone assembly for controlling bending angle of endoscope |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112294236A (en) * | 2020-10-14 | 2021-02-02 | 北京大学 | Endoscope front end bending part form detection system and detection method thereof |
| CN113827169A (en) * | 2021-09-23 | 2021-12-24 | 湖南省华芯医疗器械有限公司 | Snake bone unit, snake bone assembly, insertion part, endoscope and connecting method |
| CN113827169B (en) * | 2021-09-23 | 2022-08-02 | 湖南省华芯医疗器械有限公司 | Snake bone unit, snake bone assembly, insertion part, endoscope and connecting method |
| WO2023045123A1 (en) * | 2021-09-23 | 2023-03-30 | 湖南省华芯医疗器械有限公司 | Serpentine unit, serpentine assembly, insertion portion, endoscope, and connection method |
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