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CN-121987124-A - Bending snake bone of medical soft choledochoscope

CN121987124ACN 121987124 ACN121987124 ACN 121987124ACN-121987124-A

Abstract

The invention relates to a bending snake bone of a medical soft choledochoscope, which comprises a snake bone front joint ring, a snake bone middle joint ring and a snake bone rear joint ring which are sequentially connected, and is characterized in that the tail part of the snake bone front joint ring is provided with a front elastic buckle slot, two ends of the snake bone middle joint ring are respectively provided with a middle elastic buckle and a middle elastic buckle slot, the snake bone rear joint ring is provided with a rear elastic buckle, the middle elastic buckle of the snake bone middle joint ring adjacent to the snake bone front joint ring is clamped in the front elastic buckle slot, the rear elastic buckle is clamped in the middle elastic buckle slot of the snake bone middle joint ring adjacent to the snake bone front joint ring, the middle elastic buckle of one of the two adjacent snake bone middle joint rings is clamped in the middle elastic buckle slot of the other snake bone middle joint ring, and the joint rings are connected into a whole through an elastic connecting rod. The invention can realize quick and efficient positioning and assembly, ensures that the snake bone is integrally positioned and connected reliably and flexibly in bending, and does not deviate or twist when rotating the bent angle.

Inventors

  • SHI JIAN
  • XIE MINZHENG
  • XIE MENGLEI

Assignees

  • 常州延顺光电科技有限公司

Dates

Publication Date
20260508
Application Date
20260323

Claims (10)

  1. 1. The utility model provides a crooked snake bone of medical soft choledochoscope, connects circle (3) behind preceding ring (1) and snake bone including snake bone to and establish connect circle (2) in a plurality of snake bones between preceding ring (1) and snake bone after connect circle (3), its characterized in that: the tail part of the snake bone front connecting ring (1) is provided with a front connecting part (11) extending along the axial direction, the front connecting part (11) is provided with a front elastic buckling slot hole (12), The two ends of the snake bone middle connecting ring (2) are respectively provided with a middle connecting part (21) extending along the axial direction of the snake bone middle connecting ring, the middle connecting parts (21) at the two ends of the snake bone middle connecting ring (2) are respectively provided with a middle elastic buckle (22) and a middle elastic buckle slot hole (23), The head of the snake bone rear connecting ring (3) is provided with a rear connecting part (31) extending along the axial direction, the rear connecting part (31) is provided with a rear elastic buckle (32), The middle elastic buckle (22) of the middle snake bone connecting ring (2) adjacent to the front snake bone connecting ring (1) is clamped in the front elastic buckle slot (12) of the front connecting part (11), the rear elastic buckle (32) of the rear snake bone connecting ring (3) is clamped in the middle elastic buckle slot (23) of the middle snake bone connecting ring (2) adjacent to the rear snake bone connecting ring, The middle elastic buckle (22) of one of the two adjacent middle snake bone connecting rings (2) is clamped in the middle elastic buckle slot (23) of the other middle snake bone connecting ring, The front connecting rings (1) and the adjacent middle connecting rings (2) of the snake bones, the rear connecting rings (3) and the adjacent middle connecting rings (2) of the snake bones and the adjacent middle connecting rings (2) of the two snake bones are connected into a whole through elastic connecting rods (4).
  2. 2. The curved snake bone of the medical soft choledochoscope according to claim 1, wherein: Elastic connecting pins (41) at two ends of an elastic connecting rod (4) connected between the snake bone front connecting ring (1) and the adjacent snake bone middle connecting ring (2) are respectively clamped with the snake bone front connecting ring (1) and the snake bone middle connecting ring, Elastic connecting pins (41) at two ends of an elastic connecting rod (4) connected between the snake bone rear connecting ring (3) and the adjacent snake bone middle connecting ring (2) are respectively clamped with the snake bone rear connecting ring (3) and the snake bone middle connecting ring, Elastic connecting pins (41) at two ends of an elastic connecting rod (4) connected between two adjacent snake bone middle connecting rings (2) are respectively clamped with the two snake bone middle connecting rings.
  3. 3. The bending snake bone of the medical soft choledochoscope of claim 1, wherein the front connecting part (11) of the snake bone front connecting ring (1), the middle connecting part (21) of the snake bone middle connecting ring (2) and the rear connecting part (31) of the snake bone rear connecting ring (3) are of double-layer step structures, A first-stage step of the front connecting part (11) is provided with a front elastic buckling slot hole (12), a second-stage step of the front connecting part is provided with a front positioning connecting hole (13), The first-stage steps of the two intermediate connecting parts (21) are respectively provided with an intermediate elastic buckle (22) and an intermediate elastic buckle slot (23), the second-stage steps are provided with intermediate positioning connecting holes (24), A first step of the rear connecting part (31) is provided with a rear elastic buckle (32), a second step of the rear connecting part is provided with a rear positioning connecting hole (33), Elastic connecting pins (41) at two ends of an elastic connecting rod (4) connected between the snake bone front connecting ring (1) and the adjacent snake bone middle connecting ring (2) are respectively inserted into a front positioning connecting hole (13) and a middle positioning connecting hole (24) on the corresponding secondary steps, Elastic connecting pins (41) at two ends of an elastic connecting rod (4) connected between the snake bone rear connecting ring (3) and the adjacent snake bone middle connecting ring (2) are respectively inserted into a rear positioning connecting hole (33) and a middle positioning connecting hole (24) on the corresponding secondary steps, Elastic connecting pins (41) at two ends of an elastic connecting rod (4) connected between two adjacent snake bone middle connecting rings (2) are respectively inserted into middle positioning connecting holes (24) on the corresponding second-stage steps.
  4. 4. The bending snake bone of the medical soft choledochoscope according to claim 1, wherein the surface of the elastic connecting rod (4) is lower than the maximum outer circular surfaces of the snake bone front connecting ring (1), the snake bone middle connecting ring (2) and the snake bone rear connecting ring (3).
  5. 5. The bending snake bone of the medical soft choledochoscope according to claim 1, wherein the elastic connecting rod (4) is of a U-shaped structure, and comprises a connecting rod body (42) and elastic connecting pins (41) positioned at two ends of the connecting rod body (42), and the elastic connecting pins (41) are provided with neck-direction shrinkage notches (43) which are convenient for clamping.
  6. 6. The bending snake bone of the medical soft choledochoscope of claim 1, wherein the snake bone rear connecting ring (3) is provided with elastic clamping holes (34) which are symmetrically arranged along the snake bone rear connecting ring and are used for realizing clamping connection with the insertion tube.
  7. 7. The bending snake bone of the medical soft choledochoscope according to claim 1, wherein the snake bone rear joint ring (3) is provided with an insertion tube switching unit, the insertion tube switching unit comprises a switching joint (5) and a traction spring tube (6), one end of the traction spring tube (6) is welded in a traction spring tube fixing groove (56) of the switching joint (5), One end of the adapter joint (5) is provided with an elastic clamping head (51) which is symmetrically arranged along the adapter joint, the free end of the elastic clamping head (51) is provided with an outwards extending barb part (52), the snake bone rear joint ring (3) is provided with an elastic clamping hole (34) which is symmetrically arranged along the snake bone rear joint ring, The elastic clamping head (51) is elastically deformed under the action of external force, so that the barb portion (52) and the elastic clamping hole (34) of the snake bone rear joint ring (3) form precise transition fit, and meanwhile, the elastic clamping head (51) is deformed in a recovery mode, and the quick clamping and fixing of the adapter connector (5) and the snake bone rear joint ring (3) are realized.
  8. 8. The flexible snake bone of claim 7, wherein the elastic clamping head (51) is provided with an elastic connecting arm (53) which is connected with the adapter (5) into a whole and is integrally formed by machining, the free end of the elastic connecting arm (53) is provided with an outwards extending barb part (52), and the outer edge surface of the barb part (52) is in a guiding arc-shaped structure which can form guiding and positioning fit with the corner unit.
  9. 9. The bending snake bone of the medical soft choledochoscope of claim 7, wherein the adapter joint (5) is of a step-shaped structure formed by a bent angle connecting part (54) and an inserting connecting part (55), the bent angle connecting part (54) is inserted into an inner hole of the snake bone rear connecting ring (3), meanwhile, an elastic clamping head (51) arranged on the bent angle connecting part (54) is clamped in the elastic clamping hole (34), and the inserting connecting part (55) is used for forming assembling connection with an inserting tube.
  10. 10. The bending snake bone of the medical soft choledochoscope according to claim 1, wherein the front connecting ring (1) of the snake bone and the middle connecting ring (2) of the snake bone are respectively provided with two or four rope blocking grooves (7) which are cut by wires and are punched and formed towards the central direction of the connecting ring, When two rope blocking grooves (7) are arranged on the snake bone front connecting ring (1) and the snake bone middle connecting ring (2), the two rope blocking grooves (7) are symmetrically arranged along the center of each connecting ring, or one rope blocking groove (7) deviates from the central axis of the connecting ring by 3-7 degrees, and the rope blocking grooves deviated from the connecting rings are on the same axis.

Description

Bending snake bone of medical soft choledochoscope Technical Field The invention relates to a curved snake bone, in particular to a curved snake bone of a medical soft choledochoscope, and belongs to the technical field of endoscopes. Background Medical electronic or fiber soft choledochoscope is a high-tech medical instrument for diagnosing or treating benign and malignant diseases in common bile duct by minimally invasive surgery. At present, the soft choledochoscope manufactured in China comprises an insertion tube and a snake bone which is arranged at the head of the insertion tube and is used for bending the insertion portion. The snake bone end section, the snake bone root end section and the snake bone middle end connecting section in the prior art are connected in a cross fit manner, specifically, the snake bone end section, the snake bone root end section and the snake bone middle end connecting section are mutually butted through bifurcation open slots on each section, the butt joint is only carried out in the implementation process, the connection is not achieved yet, after bifurcation butt joint, the operation wire is connected with the snake bone end section, the snake bone root end section and the snake bone middle end connecting section through connecting holes, and the following defects exist in the snake bone: firstly, when the whole snake bone is connected, the snake bone has the defects of unstable and unreliable positioning points when bending angles. Secondly, after the opposite bifurcation grooves of each part of the snake bone are butted, the number of positioning points of the rotating points is insufficient, and the steel wire ropes are bound and connected, so that the rotating axle center is unstable, and the steel wire ropes can be loosened after being stressed and cannot be effectively positioned. The rotation is carried out from any direction, the rotation center points or the rotation fulcrums are offset, when the bending angles of the snake bones are larger, the offset of the rotation fulcrums is larger, the bending angles are not on the plane of the specified side surfaces, the phenomenon of twisting and tilting the head is larger when the bending angles are larger, and the offset is the phenomenon of tilting the head, so that when the endoscope is used, the camera of the endoscope cannot timely check and observe the position, even the position of checking and observing cannot be found in the related inner cavity. The operation of the user is difficult, and the working efficiency of the endoscope is affected. Thirdly, the whole snake bone has the disadvantage of different shafts, namely, the end protruding part of the snake bone is slotted between the end sections of the snake bone, the root end sections of the snake bone and the middle end connecting sections of the snake bone, the slotted protruding part is split left and right, and the two adjacent sections are mutually staggered split heads which are mutually inserted and butted. When the whole snake bone is crossed and butted, the crossed and butted position port does not have a coaxial locating point and a datum point, not only the adjacent two snake bone sections are not on the same axle center after being connected, but also the crossed and butted points in the same row are not on the same axle line after a plurality of snake bone sections are connected, and the concentricity of the whole snake bone after the crossed and butted snake bone sections is larger in deviation, and the cylindricity of the whole snake bone is larger in deviation. The structural design is not suitable for use in the curved snake bone of an endoscope. During the use of the endoscope, the snake bone presents problems, operational difficulties, and the like. Fourth, the whole snake bone joint is the implementation that the recess butt joint department that the fluting was crossed does not pass through the flattening, and its butt joint position that intersects is the arcwall face, is not a plane, and butt joint is not the crisscross parallel surface of arc between its two, and when its rotation bent angle, there is the uneven shortcoming of the reference surface of bent angle fulcrum. Fifthly, when two or more mechanical structural members are connected with each other, when tolerance and error of the reference surface are large, the phenomena of large vertical or horizontal deviation, skew and the like exist. Disclosure of Invention The invention aims to provide the bending snake bone of the medical soft choledochoscope, which not only can realize quick and efficient positioning and assembly, ensure that the whole snake bone is reliably positioned and connected, but also can not generate the phenomena of deflection and distortion in the rotation bending angle, has accurate bending angle direction and flexible rotation bending angle. In order to achieve the above purpose, the technical scheme of the invention is that the bending snake bone of the