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CN-121971016-A - Soft endoscope insertion part assembly

CN121971016ACN 121971016 ACN121971016 ACN 121971016ACN-121971016-A

Abstract

The invention relates to a soft endoscope insertion part assembly, which comprises an angle bending unit and an insertion part unit which are connected into a whole, wherein the insertion part unit comprises an insertion pipe framework, an angle bending traction unit and an operation handle connection unit, the angle bending traction unit comprises an insertion pipe front connecting ring and an insertion pipe rear connecting ring which are arranged at the head end and the tail end of the insertion pipe framework, the angle bending unit is assembled and connected with the insertion pipe front connecting ring, and the operation handle connection unit is assembled and connected with the insertion pipe rear connecting ring. The connection between the insertion part unit, the bent angle unit and the handle can be rapidly positioned and clamped, so that the assembly efficiency and the assembly precision are improved, and the maintenance cost is reduced.

Inventors

  • SHI JIAN
  • XIE MINZHENG
  • XIE MENGLEI

Assignees

  • 常州延顺光电科技有限公司

Dates

Publication Date
20260505
Application Date
20260323

Claims (14)

  1. 1. A soft endoscope insertion part assembly comprises an angle bending unit and an insertion part unit which are connected into a whole, wherein the insertion part unit comprises an insertion pipe framework, an angle bending traction unit and an operation handle connecting unit, The insertion tube framework comprises a spring tube (11), a woven net tube (12) and a flexible protection hose (13), the woven net tube (12) is arranged at the periphery of the spring tube (11), the flexible protection hose (13) is arranged at the periphery of the woven net tube (12), The bent angle traction unit comprises an insert tube front joint ring (21) and an insert tube rear joint ring (22) which are arranged at the head end and the tail end of the woven mesh tube (12), the bent angle unit is assembled and connected with the insert tube front joint ring (21), the operation handle connection unit is assembled and connected with the insert tube rear joint ring (22), a traction spring tube (23) fixed on the insert tube front joint ring (21) penetrates out of the operation handle connection unit through a spring tube (11), The method is characterized in that: The front joint ring (21) of the insertion tube is provided with elastic clamping heads (211) symmetrically arranged along the front joint ring, the free end of the elastic clamping heads (211) is provided with barb parts (212) extending outwards, the elastic clamping heads (211) elastically deform under the action of external force to enable the barb parts (212) to form precise transition fit with the corner units, meanwhile, the elastic clamping heads (211) recover deformation to realize the rapid clamping and fixing of the front joint ring (21) of the insertion tube and the corner units, The insertion tube rear joint ring (22) is provided with elastic clamping holes (221) symmetrically arranged along the insertion tube rear joint ring, and the elastic clamping holes (221) and the operation handle connecting unit form precise transition fit.
  2. 2. A flexible endoscope insertion section assembly as described in claim 1, wherein the elastic clamping head (211) is provided with an elastic connecting arm (213) which is connected with the insertion tube front joint ring (21) into a whole and is integrally formed by machining, the free end of the elastic connecting arm (213) is provided with an outwards extending barb portion (212), and the outer edge surface of the barb portion (212) is in a guiding arc-shaped structure capable of forming guiding and positioning matching with the bent angle unit.
  3. 3. A soft endoscope insertion part assembly according to claim 1, characterized in that the insertion tube front joint ring (21) is of a step-shaped structure formed by a bent angle connecting part (214) and an insertion connecting part (215), the bent angle connecting part (214) is inserted into an inner hole of the bent angle unit, the bent angle connecting part (214) is provided with an elastic clamping head (211), and the insertion connecting part (215) is sleeved at the head end of the woven mesh tube (12).
  4. 4. A flexible endoscope insertion section assembly according to claim 1, characterized in that two or four spring tube fixing grooves (216) which are arranged at equal intervals along the circumferential direction and are used for positioning and fixing a traction spring tube (23) are arranged on the bent angle connecting part (214) of the insertion tube front connecting ring (21).
  5. 5. A flexible endoscope insertion section assembly according to claim 1, characterized in that two spring tube fixing grooves (216) for positioning and fixing a traction spring tube (23) are provided on the corner connecting portion (214) of the insertion tube front joint ring (21), the elastic clamping head (211) and the spring tube fixing grooves (216) are arranged separately along the circumferential direction of the insertion tube front joint ring (21), and one of the spring tube fixing grooves (216) is offset from the central axis of the insertion tube front joint ring (21) by 3 DEG to 7 deg.
  6. 6. A soft endoscope insertion part assembly according to claim 1 is characterized in that a limiting annular table (222) connected with the insertion tube rear joint ring (22) is arranged on the periphery of the insertion tube rear joint ring (22), and two elastic clamping holes (221) symmetrically arranged along the two sides of the limiting annular table (222) and four soldering tin holes uniformly arranged along the circumferential direction of the two elastic clamping holes and used for forming fixed connection with a woven net tube (12) are respectively arranged on the insertion tube rear joint ring (22).
  7. 7. A soft endoscope insertion section assembly according to claim 1, wherein said corner bending unit comprises a two-way bending snake bone or a four-way bending snake bone, and each of the two-way bending snake bone or the four-way bending snake bone comprises a snake bone front joint ring (31) and a snake bone rear joint ring (33), and a plurality of snake bone middle joint rings (32) provided between the snake bone front joint ring (31) and the snake bone rear joint ring (33), The snake bone front connecting ring (31) is provided with a front connecting part (311), the front connecting part (311) is provided with a front elastic buckling groove hole (312), two ends of the snake bone middle connecting ring (32) are respectively provided with a middle connecting part (321), the middle connecting parts (321) at two ends of the snake bone middle connecting ring (32) are respectively provided with a middle elastic buckle (322) and a middle elastic buckling groove hole (323), the snake bone rear connecting ring (33) is provided with a rear connecting part (331), the rear connecting part (331) is provided with a rear elastic buckle (332), The middle elastic buckle (322) of the middle snake bone connecting ring (32) adjacent to the front snake bone connecting ring (31) is clamped in the front elastic buckle slot (312) of the front connecting part (311), the rear elastic buckle (332) of the rear snake bone connecting ring (33) is clamped in the middle elastic buckle slot (323) of the middle snake bone connecting ring (32) adjacent to the rear snake bone connecting ring, The front connecting ring (31) of the snake bone is connected with the middle connecting ring (32) of the adjacent snake bone, the rear connecting ring (33) of the snake bone is connected with the middle connecting ring (32) of the adjacent snake bone, and the middle connecting rings (32) of the adjacent two snake bones are connected into a whole through an elastic connecting rod (34), The middle elastic buckle (322) of one middle joint ring of two adjacent middle joint rings (32) of two bending snake bones is clamped in the middle elastic buckle slot (323) of the other middle joint ring, The middle elastic buckle (322) of one of the adjacent two middle connecting rings (32) in the four-direction bending snake bone is clamped in the middle elastic buckle slot (323) of the other middle connecting ring after rotating by 90 degrees, The barb part (212) of the front insertion tube connecting ring (21) is inserted into the insertion hole of the rear snake bone connecting ring (33).
  8. 8. A soft endoscope insertion section assembly according to claim 7, characterized in that the front connection section (311) of said snake bone front connection ring (31), the middle connection section (321) of said snake bone middle connection ring (32) and the rear connection section (331) of said snake bone rear connection ring (33) are of double-layer step structure, A first step of the front connecting part (311) is provided with a front elastic buckle slot hole (312), a second step of the front connecting part is provided with a front positioning connecting hole, The first-stage steps of the two intermediate connecting parts (321) are respectively provided with an intermediate elastic buckle (322) and an intermediate elastic buckle slot (323), the second-stage steps are provided with intermediate positioning connecting holes, A first step of the rear connecting part (331) is provided with a rear elastic buckle (332), a second step of the rear connecting part is provided with a rear positioning connecting hole, Elastic connecting pins (341) at two ends of an elastic connecting rod (34) connected between the snake bone front connecting ring (31) and the adjacent snake bone middle connecting ring (32) are respectively inserted into a front positioning connecting hole and a middle positioning connecting hole on the corresponding secondary steps, Elastic connecting pins (341) at two ends of an elastic connecting rod (34) connected between the snake bone rear connecting ring (33) and the adjacent snake bone middle connecting ring (32) are respectively inserted into a rear positioning connecting hole and a middle positioning connecting hole on the corresponding secondary steps, Elastic connecting pins (341) at two ends of an elastic connecting rod (34) connected between two adjacent snake bone middle connecting rings (32) are respectively inserted into middle positioning connecting holes on corresponding secondary steps, The surfaces of the elastic connecting rods (34) are lower than the maximum outer circular surfaces of the snake bone front connecting ring (31), the snake bone middle connecting ring (32) and the snake bone rear connecting ring (33).
  9. 9. The flexible endoscope insertion section assembly of claim 7, wherein said elastic connecting rod (34) has a U-shaped structure as a whole and comprises a connecting rod body (342) and elastic connecting pins (341) positioned at both ends of the connecting rod body (342), said elastic connecting pins (341) having axial shrinkage notches for facilitating the implementation of the clamping.
  10. 10. A flexible endoscope insertion portion assembly according to claim 1 and wherein: When the corner bending unit comprises a two-way bending snake bone, the two-way bending snake bone is provided with two traction steel wire ropes, the two traction steel wire ropes respectively penetrate into corresponding traction spring tubes (23) fixed on the front connecting ring (21) of the insertion tube, the periphery of the two-way bending snake bone is provided with a flexible protection sleeve, When the corner bending unit comprises four-direction bending snake bones, the four-direction bending snake bones are provided with four traction steel wire ropes, the four traction steel wire ropes penetrate into corresponding traction spring tubes (23) fixed on the front connecting ring (21) of the insertion tube respectively, and the periphery of the four-direction bending snake bones is provided with a flexible protection sleeve.
  11. 11. The flexible endoscope insertion section assembly according to claim 1, wherein the corner bending unit comprises a curved snake bone and a camera head seat (35) arranged at the head of the curved snake bone, the camera head seat (35) is connected with the curved snake bone into a whole through a front head seat screw in the radial direction, and a camera head mounting hole, two light guide beam light holes, a passage hole of a minimally invasive instrument and a mounting hole of a water vapor jet piece of a cleaning lens are formed at the end part of the camera head seat (35).
  12. 12. A soft endoscope insertion part assembly according to claim 1, characterized in that the operation handle connection unit comprises a fixing nut (41), an elastic adapter seat (42), a sealing conical sleeve (43) and an embedded part (44), wherein the fixing nut (41) is sleeved on the periphery of the rear joint ring (22) of the insertion tube and detachably connected with the elastic adapter seat (42), a limit annular table (222) on the periphery of the rear joint ring (22) of the insertion tube is abutted against the inner wall of the fixing nut (41), the elastic adapter seat (42) is in precise transition fit with an elastic clamping hole (221), the operation handle (5) is in sealing connection with the elastic adapter seat (42) through a radial screw and a sealing ring, the sealing conical sleeve (43) is sleeved on the periphery of the flexible protection hose (13), and meanwhile, the operation handle (5) is connected with the sealing conical sleeve (43) through the embedded part (44).
  13. 13. The flexible endoscope insertion section assembly of claim 12, wherein the end of said elastic adapter (42) is provided with elastic adapting hooks (421) symmetrically arranged along the end, and the elastic adapting hooks (421) are clamped in the elastic clamping holes (221) of the rear joint ring (22) of the insertion tube.
  14. 14. A soft endoscope insertion section assembly according to claim 1, characterized in that said spring tube (11) is wound by two sections of steel strips of different hardness, so that the spring tube (11) has a front section (111) and a rear section (112) connected as one body, the thickness of said steel strip is 0.07mm to 0.11mm, the width is 1.3mm to 2.1mm, the hardness of the front section (111) of said spring tube (11) is smaller than the hardness of the rear section (112), the pitch of the front section (111) is 1.7mm to 2.5mm, the pitch of the rear section (112) is 2.8mm to 3.4mm, The braided net tube (12) coated on the periphery of the rear section (112) is coated with plastic, a polyurethane layer is formed after liquid polyurethane is solidified, and a polyurethane film protective layer (14) is further arranged on the periphery of the flexible protective hose (13).

Description

Soft endoscope insertion part assembly Technical Field The invention relates to an insertion tube assembly, in particular to a soft endoscope insertion part assembly, 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 domestic soft choledochoscope is small in diameter for installing forceps channel pipes, the channel aperture of instruments such as biopsy forceps is ∅ 1.6.6 mm or less, and only instruments fittings such as biopsy forceps with the outer diameter of ∅ 1.2.2 mm or ∅ 1.5.5 mm or less, stone extraction and the like can be small in diameter, so that the operation and the use are inconvenient sometimes, and the stone extraction is difficult. The prior choledochoscope insertion tube assembly has the defects that the outer diameter is thicker, the aperture is smaller, a thicker forceps channel tube cannot be installed, the hole of a working channel of a thinner forceps channel is smaller, a thicker minimally invasive surgical accessory of the related choledochoscope cannot pass through the working channel of the choledochoscope, a larger minimally invasive surgical instrument such as a choledochoscope cannot be used, a common bile duct and other positions cannot be entered, diseases in a biliary tract region are required to be rapidly checked and diagnosed, and the like are difficult to take out a larger choledocholelithiasis. And the connection between the angle bending unit and the front ring of the insertion tube and the connection between the rear ring of the insertion tube and the handle in the prior art, or the method of directly welding the angle bending unit and the front ring of the insertion tube and the rear ring of the insertion tube into a whole by adopting a steel sleeve ring, the method has the defects of more assembly and production labor, long production period, high production cost, long time for maintaining and disassembling the choledochoscope, high maintenance cost and the like. Disclosure of Invention The invention aims to provide the soft endoscope insertion part assembly which not only can realize high-precision positioning connection, but also can realize quick positioning clamping of the connection between the insertion part unit and the corner unit and the handle, replaces a welding integrated structure mode in the prior art, improves the assembly efficiency and the assembly precision, reduces the maintenance cost and reduces the maintenance time. In order to achieve the aim, the technical scheme of the invention is that the soft endoscope insertion part assembly comprises an angle bending unit and an insertion part unit which are connected into a whole, wherein the insertion part unit comprises an insertion pipe framework, an angle bending traction unit and an operation handle connecting unit, The insertion tube framework comprises a spring tube, a woven net tube and a flexible protective hose, the woven net tube is arranged at the periphery of the spring tube, the flexible protective hose is positioned at the periphery of the woven net tube, The bent angle traction unit comprises an insert tube front connecting ring and an insert tube rear connecting ring which are arranged at the head end and the tail end of the woven mesh tube, the bent angle unit is assembled and connected with the insert tube front connecting ring, the operation handle connecting unit is assembled and connected with the insert tube rear connecting ring, and a traction spring tube fixed on the insert tube front connecting ring penetrates out of the operation handle connecting unit through a spring tube, and the innovation point of the bent angle traction unit is that: the front joint ring of the insertion tube is provided with elastic clamping heads which are symmetrically arranged along the front joint ring, the free ends of the elastic clamping heads are provided with barb parts which extend outwards, the elastic clamping heads elastically deform under the action of external force to enable the barb parts to form precise transition fit with the corner unit, the elastic clamping heads recover deformation at the same time, the rapid clamping and fixing of the front joint ring of the insertion tube and the corner unit are realized, The rear joint ring of the insertion tube is provided with elastic clamping holes which are symmetrically arranged along the rear joint ring, and the elastic clamping holes and the operation handle connecting unit form precise transition fit. In the above technical scheme, the elastic clamping head is provided with an elastic connecting arm which is connected with the front connecting ring of the insertion tube into a whole and is integrally formed through machining, the free end of the elastic connecting arm is provided with an outwards extending barb part, and