An endoscope with a special-shaped snake bone component

Abstract

The present invention relates to an endoscope, and discloses an endoscope with a special-shaped snake bone component, comprising a control device and a snake bone, wherein the control device comprises an operating handle (2), wherein a rotatable wire turntable (24) and a wire through hole (25) matched with the wire turntable (24) are arranged in the operating handle (2), wherein a wire (4) is passed through the wire through hole (25), and the snake bone (30) comprises a special-shaped snake bone component, wherein the special-shaped snake bone component comprises a plurality of snake bone segments (1), wherein the snake bone segment (1) is tubular and has a working cavity (101) formed therein, and wherein the two end surfaces of the snake bone segment (1) are respectively a matching convex surface (102) and a matching concave surface (103) matched with the end surface of the adjacent snake bone segment (1). The present invention has the characteristics of simple structure, convenient assembly, and the ability to set different shapes according to actual needs to more comprehensively meet clinical needs, and furthermore, the control device thereof can effectively avoid problems such as inadequate bending and bending failure of the front end snake bone caused by the wire being out of the groove.

Description

Technical Field

[0001] The present invention relates to an endoscope, and more particularly to an endoscope with a special-shaped snake bone assembly. Background Art

[0002] An endoscope is a commonly used detection instrument in modern medical diagnosis and treatment. It can enter the stomach through the oral cavity or enter the body through other natural orifices, or enter the human body through a small incision made during surgery. Doctors can use the endoscope to see lesions that cannot be shown by X-rays, which is very useful for diagnosing diseases. The snake bone structure is a commonly used component in endoscopes.

[0003] Existing endoscopes, especially medical flexible endoscopes, generally consist of an operating part and an insertion part. The insertion part is composed of an insertion tube, a bending part, and a head end part. Inside the head end part, there is a CCD or CMOS camera and a light source, which are responsible for transmitting the head end image to the rear end through a cable. Inside the bending part, there is a snake bone, which can be controlled through the operating part to achieve left and right deflection, facilitating doctors to observe the surrounding situation.

[0004] Currently, snake bone assemblies generally include an integral snake bone and a spliced snake bone. Among them, the spliced snake bone is generally formed by machining and splicing. The raw material of the snake bone is seamless steel pipe, and the precision requirements for the seamless steel pipe are relatively high, generally requiring a dimensional tolerance of ±0.01. Generally, special-shaped seamless steel pipes cannot reach this precision, otherwise it will cause the snake bone after processing to be unable to rotate or have abnormal rotation angles. Therefore, most of the snake bones on the market have a cylindrical shape.

[0005] The cylindrical snake bone will cause the axial projection of the entire insertion part of the endoscope to be basically circular. However, there are some special-shaped ducts and cavities in the human body, and doctors often need endoscopes with non-circular axial projections of the insertion part to facilitate some examinations and treatments. Therefore, there is an urgent need for special-shaped snake bone assemblies to carry out some special examinations and treatments.

[0006] In addition, traditional control devices generally use steel wires arranged on a turntable. The steel wires are connected to the snake bone, and the snake bone is controlled by controlling the rotation of the turntable. In the existing method, generally an open guide groove is arranged on the side of the turntable to guide the steel wire. This open guide groove method has problems such as poor fixing effect of the steel wire rope on the turntable, and the steel wire rope is prone to slipping out of the guide groove during installation and pulling, which will cause problems such as the front-end snake bone not bending in place and bending failure. Summary of the Invention

[0007] The present invention aims at the problems existing in the endoscope in the prior art and provides an endoscope with a special-shaped snake bone assembly.

[0008] In order to solve the above technical problems, the present invention is solved by the following technical solutions:

[0009] An endoscope with a special-shaped snake bone component comprises an operating part and an insertion part, the operating part comprises a control device, the insertion part comprises an insertion tube, a snake bone and a head end portion connected in sequence, the control device comprises an operating handle, the operating handle comprises an operating end and a snake bone connecting end, the operating end is provided with a rotatable wire turntable and a wire through-hole matched with the wire turntable, a wire is passed through the wire through-hole with one end located on the wire turntable and the other end extending out of the snake bone connecting end and connected to the snake bone, the wire can control the snake bone under the rotation of the wire turntable; compared with the existing open wire guide groove, the wire through-hole can effectively prevent the wire from falling out of the groove, thereby avoiding the problems of inadequate bending and bending failure of the front end snake bone caused by the wire falling out of the groove.

[0010] The snake bone includes a special-shaped snake bone component, and the special-shaped snake bone component has multiple snake bone segments connected in sequence by steel wires. The snake bone segment is tubular and forms a working cavity inside. The two end faces of the snake bone segment are respectively a matching convex surface and a matching concave surface that match the end faces of the adjacent snake bone segment. When the matching convex surface on the adjacent snake bone segment abuts against the matching concave surface, a rotation angle is formed between the matching convex surface and the matching concave surface. The snake bone segment is set to have a matching convex surface and a matching concave surface at both ends, which can rotate in coordination with the adjacent snake bone segment. The snake bone segment is designed to be tubular, and its cross section can be designed into any shape according to actual clinical needs, which can effectively cope with some special inspections and treatments of special-shaped pipes and cavities in the human body.

[0011] Preferably, a steel wire channel for the steel wire to pass through is provided on the inner side of the snake bone joint, and there are two steel wire channels symmetrically arranged on the inner wall of the snake bone joint. A steel wire is passed through each of the two symmetrically arranged steel wire channels, and the movement of the snake bone can be effectively and stably controlled by the steel wire.

[0012] Preferably, the snake bone segment is a tubular body formed by punching after injection molding or extrusion. The snake bone segment has a simple structure, is convenient to process and assemble, and can effectively improve the processing and assembly accuracy and efficiency.

[0013] Preferably, the matching convex surface includes two symmetrically arranged outer convex surfaces, which are transitionally connected by an outer convex arc surface; the matching concave surface includes two symmetrically arranged inner concave surfaces, which are transitionally connected by an inner concave arc surface, and when the outer convex arc surfaces on adjacent snake bone segments abut against the inner concave arc surfaces, a rotation angle is formed between the outer convex surface and the inner concave surface. The relative deflection angle between adjacent snake bone segments is constrained by the rotation angle between the outer convex surface and the inner concave surface, so as to realize the bending control of the entire snake bone.

[0014] Preferably, the operating end is provided with a mounting ring sleeve, the wire turntable is rotatably mounted in the mounting ring sleeve, the side wall of the wire turntable is provided with an annular wire groove with an opening facing the mounting ring sleeve, and the annular wire groove and the inner surface of the mounting ring sleeve together form a wire through hole. The wire through hole is formed in a simple manner without complicated and cumbersome processing, and can be realized through simple assembly, and the structure is stable, detachable, and has good flexibility in use.

[0015] Preferably, the wire turntable comprises a rotating disk located in a mounting ring sleeve and a driving disk connected to the rotating disk via a connecting shaft, and a dial block for driving the driving disk to rotate is connected to the driving disk. The wire turntable is divided into two detachable parts, which can make it easier to assemble. When the dial block is driven, the driving disk can well drive the rotating disk to rotate.

[0016] Preferably, the wire turntable includes an outer ring wall and an inner ring wall that are spaced and coaxially arranged, a gap channel is formed between the inner surface of the outer ring wall and the outer surface of the inner ring wall, an upper limit block and a lower limit block are respectively provided on the upper and lower sides of the gap channel, and a wire perforation is formed between the upper limit block and the lower limit block in the gap channel. The formation method of the wire perforation has good structural stability, and the stability limit of the wire can be maintained even if the wire is subjected to a large deflection force. In addition, the upper limit block and the lower limit block can be integrally formed with the outer ring wall and the inner ring wall, and the processing is efficient. A relatively coherent wire perforation can be obtained without more delicate punching processing, so as to reduce the difficulty of the operator's wire threading operation.

[0017] Preferably, the operating end is provided with a mounting ring sleeve, the wire turntable is rotatably arranged in the mounting ring sleeve, the mounting ring sleeve and the upper end surface of the outer ring wall are provided with a wire outlet for the wire to pass through the wire hole to the snake bone connection end, and the lower end surface of the wire outlet on the outer ring wall is flush with the upper end surface of the lower limit block. The installation method of the wire turntable on the operating handle is relatively convenient, and the lower end surface of the wire outlet on the outer ring wall is flush with the upper end surface of the lower limit block, which can ensure that the wire passes through the wire hole horizontally, making the subsequent traction of the wire smoother and more stable.

[0018] Preferably, a wire fixing part is provided on the wire turntable, and the end of the wire is limited in the wire fixing part. The wire fixing part includes a wire pressing groove provided on the end surface of the wire turntable, and a wire pressing block for pressing the end of the wire is provided in the wire pressing groove. The end of the wire can also be fixed by bonding, welding or other methods.

[0019] Preferably, a steel wire guide groove is provided inside the operating handle and between the operating end and the snake bone connection end. The steel wire passes through the steel wire perforation and reaches the snake bone connection end through the steel wire guide groove. The arrangement of the steel wire guide groove enables the steel wire to be more stably and smoothly pulled from the operating end to the snake bone connection end inside the operating handle, while avoiding interference between the steel wires inside the operating handle or being blocked by the internal structure of the operating handle, which may affect the control of the snake bone by the steel wire.

[0020] Due to the adoption of the above technical solutions, the present invention has remarkable technical effects:

[0021] The endoscope designed by the present invention has a special-shaped snake bone through a reasonable structural design, and has the characteristics of simple structure, convenient assembly, and the ability to set different shapes according to actual needs to more comprehensively meet clinical requirements. In addition, the fixing effect of the steel wire rope in the control device of the present invention on the steel wire turntable is good, and it will not come out of the wire guide groove, effectively avoiding problems such as incomplete bending and bending failure of the front-end snake bone caused by the steel wire coming out of the groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic structural diagram of the special-shaped snake bone assembly in Embodiment 1 of the present invention.

[0023] Figure 2 is Figure 1 a schematic diagram of the cooperation between two adjacent snake bone segments in

[0024] Figure 3 is Figure 2 the axial front view of the snake bone segment in

[0025] Figure 4 is Figure 3 the schematic working state diagram of

[0026] Figure 5 is a schematic structural diagram of the snake bone segment in Embodiment 2.

[0027] Figure 6 is Figure 5 the axial front view of

[0028] Figure 7 is Figure 6 the sectional view taken along the A-A plane of

[0029] Figure 8 is the second schematic structural diagram of the snake bone segment in Embodiment 2.

[0030] Figure 9 is the third schematic structural diagram of the snake bone segment in Embodiment 2

[0031] Figure 10 is a schematic structural diagram of the control device in Embodiment 1 of the present invention.

[0032] Figure 11 is Figure 10 a partially enlarged view of

[0033] Figure 12 is Figure 10 the rear view of

[0034] Figure 13 is Figure 12 the sectional view taken along line A-A of

[0035] Figure 14 is Figure 10 the structural schematic diagram of the wire turntable in

[0036] Figure 15 the structural schematic diagram of the control device in Embodiment 3 of the present invention.

[0037] Figure 16 is Figure 15 a partially enlarged view of

[0038] Figure 17 is Figure 15 the structural schematic diagram of the wire turntable in

[0039] Figure 18 is Figure 17 the sectional structural schematic diagram of

[0040] Figure 19 the structural schematic diagram of Embodiment 1 of the present invention. Detailed Embodiment

[0041] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0042] Embodiment 1

[0043] An endoscope with a special-shaped snake bone assembly, as shown in Figure 19 , includes an operating portion 10 and an insertion portion 20. The operating portion 10 includes a control device, and the insertion portion 20 includes an insertion tube 30, a snake bone 40, and a distal end portion 50 that are connected in sequence.

[0044] As shown in Figures 1-4 , the snake bone 40 includes a special-shaped snake bone assembly. The special-shaped snake bone assembly includes a plurality of snake bone segments 1 that are sequentially connected by wires. The snake bone segment 1 is tubular and forms a working cavity 101 inside. The two end faces of the snake bone segment 1 are a mating convex surface 102 and a mating concave surface 103 that cooperate with the end faces of the adjacent snake bone segment 1. When the mating convex surface 102 on the adjacent snake bone segment 1 abuts against the mating concave surface 103, a rotation angle 104 is formed between the mating convex surface 102 and the mating concave surface 103.

[0045] The snake bone joint 1 is an integral tubular body, and the entire snake bone is steered through the cooperation of the mating convex surface 102 and the mating concave surface 103 at both ends. The structure is simple and can be formed by injection molding or extrusion followed by punching. This processing method can effectively save the processing cycle and simplify the processing steps. There is no need for steps such as pickling and grinding after laser cutting. When designing, different cross-sectional shapes of the tube body can be designed according to actual needs, not limited to circular shapes, but also can be different special-shaped snake bones such as oval, crescent, D-shaped, etc. Even the shape of each snake bone joint 1 that makes up the snake bone can be different.

[0046] In this embodiment, a steel wire channel 105 for the steel wire to pass through is provided inside the snake bone joint 1. There are two steel wire channels 105 and they are symmetrically arranged on the inner wall of the snake bone joint 1. With the snake bone joint 1 of this structure, no rotating shaft is required during splicing and assembly. Workers only need to thread each snake bone with a steel wire rope to complete the splicing and assembly between the snake bone joints 1, greatly improving the efficiency.

[0047] At the same time, the steel wire channel 105 is also integrally formed with the snake bone joint 1. Specifically, a convex block 110 integrally formed with the snake bone joint 1 is provided on the inner wall of the snake bone joint 1, and the steel wire channel 105 is arranged through the convex block 110. The steel wire channel 105 of the entire snake bone is first formed by injection or extrusion, and then the steel wire channel 105 on each snake bone joint 1 is formed after punching, making the steel wire channel 105 of the entire snake bone coherent, rather than punching the steel wire channel 105 on each snake bone joint 1 individually by a punching press, effectively solving the problem that it is difficult to thread the steel wire because the steel wire channels 105 are not coherent when the operator threads the steel wire.

[0048] In this embodiment, the mating convex surface 102 includes two symmetrically arranged outer convex surfaces 106, and the two outer convex surfaces 106 are connected by an outer convex arc surface 107; the mating concave surface 103 includes two symmetrically arranged inner concave surfaces 108, and the two inner concave surfaces 108 are connected by an inner concave arc surface 109. When the outer convex arc surface 107 on the adjacent snake bone joint 1 abuts against the inner concave arc surface 109, a rotation angle 104 is formed between the outer convex surface 106 and the inner concave surface 108. After the outer convex arc surface 107 on the adjacent snake bone joint 1 abuts against the inner concave arc surface 109 and cooperates with each other, the rotation angle 104 between the outer convex surface 106 and the inner concave surface 108 can be adjusted by the steel wire to restrict the relative deflection angle between the adjacent snake bone joints 1, so as to achieve the bending control of the entire snake bone.

[0049] In this embodiment, in order to facilitate demolding, a demolding hole 114 communicating with the working cavity 101 is provided on the side wall of the snake bone joint 1, and the demolding hole 114 is arranged opposite to the convex block 110. The setting of the demolding hole can reduce the contact area between the mold core and the snake bone joint during the injection molding process of the snake bone joint, thus facilitating the demolding of the snake bone joint.

[0050] In addition, in this embodiment, an annular tube 111 is provided in the working cavity 101. The annular tube 111 can be fixed on the inner wall of the snake bone joint 1 after punching, or an annular tube 111 integrated with the snake bone joint 1 can be provided before injection molding or extrusion. A working channel 112 for inserting surgical instruments is formed in the annular tube 111. When a doctor operates, the surgical instruments can be operated through the working channel 112. At the same time, the working cavity 101 is also used for passing a cable 113. A camera and a light source are provided at the end of the cable 113. When in use, the user controls the steel wire to make the snake bone move, and the camera and the light source move along with the snake bone movement. Then the doctor performs surgery and operations on the photographed area.

[0051] As Figures 10-14 shown, in this embodiment, the control device includes an operating handle 2. The operating handle 2 includes an operating end 21 and a snake bone connection end 22. An installation ring sleeve 23 is provided at the operating end 21. A rotatable steel wire turntable 24 is installed in the installation ring sleeve 23. A steel wire through hole 25 is formed between the installation ring sleeve 23 and the steel wire turntable 24. One end of a steel wire 4 is located on the steel wire turntable 24, and the other end extends out of the snake bone connection end 22 and can move under the rotation of the steel wire turntable 24 through the steel wire through hole 25.

[0052] Compared with the existing open-type steel wire 4 guiding groove, the fixing effect of the steel wire 4 on the steel wire turntable 24 is better in the steel wire through hole 25, and it will not come out of the wire guiding groove, effectively avoiding problems such as incomplete bending and bending failure of the front snake bone caused by the steel wire 4 coming out of the groove.

[0053] At the same time, in this embodiment, an annular steel wire groove 201 with an opening facing the installation ring sleeve 23 is provided on the side wall of the steel wire turntable 24. The annular steel wire groove 201 and the inner surface of the installation ring sleeve 23 together form the steel wire through hole 25. The steel wire through hole 25 formed in this way is relatively simple in assembly. Only by installing the steel wire turntable 24 in the installation ring sleeve 23 can the steel wire through hole 25 be formed. At the same time, the processing is also simple. A relatively continuous steel wire through hole 25 can be obtained without complex processing methods. At the same time, the structure of the existing steel wire turntable 24 can be unchanged. Only by providing an installation ring sleeve 23 cooperating with the steel wire turntable 24 in the operating handle 2 can the steel wire through hole 25 for preventing the steel wire 4 from coming out of the groove be obtained, effectively reducing the operation difficulty and assembly difficulty of workers.

[0054] In this embodiment, a first notch 202 is provided on the upper end surface of the installation ring sleeve 23 for the steel wire 4 to pass through the steel wire through hole 25 and then pass through to the snake bone connection end 22.

[0055] In addition, a wire fixing portion 26 is provided on the wire turntable 24, and the end of the wire 4 is limited to the wire fixing portion 26. The wire fixing portion 26 includes a wire pressing groove 27 provided on the end surface of the wire turntable 24, and a wire pressing block 28 is provided in the wire pressing groove 27 to press the end of the wire 4. A second notch 203 is provided on the upper end surface of the mounting ring sleeve 23 for the wire 4 to pass from the wire pressing groove 27 to the wire through hole 25. A wire guide groove 29 is provided in the operating handle 2 and between the operating end 21 and the snake bone connecting end 22. The wire 4 passes through the wire through hole 25 from the first notch 202 through the wire guide groove 29 to the snake bone connecting end 22.

[0056] In this embodiment, two steel wires 4 are provided, and two steel wire pressing grooves 27, first notches 202 and second notches 203 are provided correspondingly. When the steel wire 4 is inserted, the end of the steel wire 4 is first inserted into the steel wire perforation 25 from the first notch 202, and then passed out from the second notch 203, and then fixed in the steel wire pressing groove 27 by the steel wire pressing block 28. The steel wire pressing block 28 is interference fit with the steel wire pressing groove 27 or fixed in the steel wire pressing groove 27 by other means. The end of the steel wire 4 can also be fixed by welding or bonding or other means. After the end of the steel wire 4 is fixed, the other end of the steel wire 4 passes through the steel wire perforation 25 from the first notch 202, passes through the steel wire guide groove 29 to the snake bone connection end 22, is connected to the snake bone joint, and is finally fixed to the end of the snake bone away from the operating handle 2, so that the steel wire 4 can be pulled, and the snake bone will deflect to the side of the pulling steel wire 4, and then the movement of the snake bone can be effectively and stably controlled by the steel wire 4.

[0057] In this embodiment, the wire turntable 24 includes a rotating disk 204 located in the mounting ring sleeve 23 and a driving disk 205 connected to the rotating disk 204 through a connecting shaft, and a shifting block 206 for shifting the driving disk 205 is connected to the driving disk 205. An annular groove 207 is provided on the outer surface of the operating end 21, and an annular protrusion 208 matching the annular groove 207 is provided on the end surface of the driving disk 205, and the annular protrusion 208 is snapped into the annular groove 207.

[0058] During assembly, the driving disk 205 is inserted from the outside of the operating end 21 so that the annular protrusion 208 is inserted into the annular groove 207, and a clamping column 210 is provided in the middle of the driving disk 205, and a clamping groove 211 for inserting the clamping column 210 is provided in the middle of the rotating disk 204, and a coaxially arranged connecting hole 212 is provided on the clamping groove 211 and the clamping column 210. After the clamping column 210 is inserted into the clamping groove 211, the connection between the driving disk 205 and the rotating disk 204 is realized through the connecting shaft in the connecting hole 212, so that when the dial block 206 drives the driving disk 205 to rotate, the rotating disk 204 rotates with the driving disk 205, and then the steel wire 4 on the steel wire turntable 24 is pulled, so that the steel wire 4 controls the movement of the snake bone.

[0059] During operation, the rotation of the steel wire turntable 24 is achieved through the shifting block 206. Subsequently, the pulling of the steel wire 4 on the steel wire turntable 24 is realized, and the movement of the snake bone is controlled by the steel wire 4. During the pulling process of the steel wire 4, the steel wire 4 can be prevented from coming out, effectively avoiding problems such as the front snake bone not bending in place and bending failure caused by the steel wire 4 coming out of the groove.

[0060] Embodiment 2

[0061] Same as Embodiment 1, as Figures 5-9 shown, the difference is that in this embodiment, a convex block 110 connected to the inner wall of the snake bone segment 1 is provided on the inner wall of the snake bone segment 1. The convex block 110 and the inner wall of the snake bone segment 1 together form a steel wire channel 105. The convex block 110 can be fixed on the snake bone segment 1 after punching, such as welded, or can be integrally injection molded or extruded with the snake bone segment 1 during the injection molding or extrusion process.

[0062] Embodiment 3

[0063] Same as Embodiment 1, as Figures 15-18 shown, the difference is that in this embodiment, the control device includes an operating handle 2. The operating handle 2 includes an operating end 21 and a snake bone connection end 22. A rotatable steel wire turntable 24 is provided at the operating end 21. A steel wire perforation 25 is provided on the steel wire turntable 24. One end of a steel wire 4 is located on the steel wire turntable 24, and the other end extends out of the snake bone connection end 22 and can move under the rotation of the steel wire turntable 24.

[0064] Compared with the existing open-type steel wire 4 guiding groove, the fixing effect of the steel wire 4 rope on the steel wire turntable 24 is better, and it will not come out of the guiding groove, effectively avoiding problems such as the front snake bone not bending in place and bending failure caused by the steel wire 4 coming out of the groove.

[0065] In this embodiment, the steel wire turntable 24 includes an outer ring wall 301 and an inner ring wall 302 that are spaced apart and coaxially arranged. A gap channel 303 is formed between the inner surface of the outer ring wall 301 and the outer surface of the inner ring wall 302. Upper limit blocks 304 and lower limit blocks 305 are respectively provided on the upper and lower sides of the gap channel 303. A steel wire perforation 25 is formed between the upper limit block 304 and the lower limit block 305 in the gap channel 303.

[0066] Among them, the upper limit block 304 is provided at the upper end of the inner ring wall 302, and the lower limit block 305 is provided at the lower end of the outer ring wall 301. Both the upper limit block 304 and the lower limit block 305 are multiple and spaced apart, which can not only effectively limit the steel wire 4 but also minimize the weight of the entire steel wire turntable 24 as much as possible, making its rotation more labor-saving.

[0067] In this embodiment, the steel wire turntable 24 is integrally formed, and the structure of the steel wire turntable 24 is integrated. There is no need to set up redundant components, which simplifies the assembly steps of the steel wire turntable 24. The formation method of the steel wire perforation 25 is relatively simple, and redundant assembly steps are eliminated, effectively reducing the operation difficulty and assembly difficulty of workers. At the same time, the integrally formed steel wire perforation 25 has good continuity, which can further reduce the difficulty of threading the steel wire 4 by the operator.

[0068] At the same time, the installation of the entire steel wire turntable 24 is very convenient. An installation ring sleeve 23 is provided at the operation end 21. The steel wire turntable 24 is rotatably arranged in the installation ring sleeve 23. Steel wire outlets 307 are provided on the upper end surfaces of the installation ring sleeve 23 and the outer ring wall 301 for the steel wire 4 to pass through the steel wire perforation 25 and then pass through to the snake bone connection end 22. The lower end surface of the steel wire outlet 307 on the outer ring wall 301 is flush with the upper end surface of the lower limit block 305, which can ensure that the steel wire 4 passes through horizontally when passing through the steel wire perforation 25, making the subsequent traction of the steel wire 4 smoother and more stable.

[0069] In this embodiment, the steel wire turntable 24 includes a disc body 306. The inner ring wall 302 is arranged at the edge of the disc body 306, and the outer ring wall 301 is arranged on the outer side surface of the disc body 306. A steel wire fixing part 26 is provided on the disc body 306, and the end of the steel wire 4 is limited at the steel wire fixing part 26. The steel wire fixing part 26 includes a steel wire pressing groove 27 arranged on the end surface of the steel wire turntable 24. A steel wire pressing block 28 for pressing the end of the steel wire 4 is arranged in the steel wire pressing groove 27. A pressing groove forming block is provided on the end surface of the steel wire turntable 24. The steel wire pressing groove 27 is arranged in the middle of the pressing groove forming block. A steel wire 4 channel for communicating the gap channel 303 and the steel wire pressing groove 27 is opened on the pressing groove forming block. A steel wire guide groove 29 is provided inside the operation handle 2 and between the operation end 21 and the snake bone connection end 22. The steel wire 4 passes from the operation end 21 through the steel wire guide groove 29 to the snake bone connection end 22.

[0070] In this embodiment, two steel wires 4 are provided, and two steel wire pressing grooves 27 and two steel wire guide grooves 29 are correspondingly arranged. When threading the steel wire 4, first pass the end of the steel wire 4 into the steel wire perforation 25 from the steel wire outlet 307, pull it to the steel wire pressing groove 27 through the steel wire 4 channel, and then fix it in the steel wire pressing groove 27 by the steel wire pressing block 28. The steel wire pressing block 28 is in interference fit with the steel wire pressing groove 27 or fixed in the steel wire pressing groove 27 by other means. The end of the steel wire 4 can also be fixed by welding or bonding or other means. After fixing the end of the steel wire 4, the other end of the steel wire 4 passes through the steel wire perforation 25 from the steel wire outlet 307, passes through the steel wire guide groove 29 to the snake bone connection end 22, is connected to the snake bone joint, and is finally fixed at the end of the snake bone away from the operation handle 2. Then, by pulling the steel wire 4, the snake bone will deflect towards the side where the steel wire 4 is pulled, and then it can be realized that the movement of the snake bone can be effectively and stably controlled by the steel wire 4.

[0071] This embodiment also includes a toggle block 308 connected to the wire turntable 24 for driving the wire turntable 24 to rotate, and a travel hole 309 is provided on the side wall of the operating end 21 for the toggle block 308 to move. A rotating shaft 310 is provided at the center of the disc body 306, and the toggle block 308 is connected to the rotating shaft 310 through a connecting portion 311, and the groove forming block is also connected to the side of the rotating shaft 310, so that when the wire turntable 24 rotates, it can drive the wire 4 to be pulled more stably.

[0072] The connecting portion 311 includes a connecting plate 312 connected to the side of the rotating shaft 310 and an arc baffle 313 arranged between the connecting plate 312 and the toggle block 308 for blocking the travel hole 309. The arc baffle 313 is located at the end of the travel hole 309 and is gap-matched with the inner wall of the operating end 21.

[0073] When the toggle block 308 is toggled, it reciprocates in the stroke hole 309, and the toggle block drives the entire wire turntable 24 to rotate in the mounting ring sleeve 23, thereby pulling the wire 4 on the wire turntable 24, so that the wire 4 controls the movement of the snake bone. In addition, the setting of the circular baffle can block the stroke hole 309 well, and can effectively protect the internal mechanism of the operating handle 2. The length of the circular baffle is greater than the length of the stroke hole 309, so that the circular baffle can always block the stroke hole 309 during the rotation of the toggle block 308.

[0074] During operation, the wire turntable 24 is rotated by turning the toggle block 308, and then the wire 4 on the wire turntable 24 is pulled, so that the wire 4 controls the movement of the snake bone. The wire 4 can be prevented from falling out during the pulling process, and the problems of inadequate bending and bending failure of the front end snake bone caused by the wire 4 coming out of the groove are effectively avoided.

[0075] In conclusion, the above is only a preferred embodiment of the present invention, and all equivalent changes and modifications made according to the scope of the patent application of the present invention should fall within the scope of the patent of the present invention.

Claims

1. An endoscope with a special-shaped snake bone assembly, comprising an operating part (10) and an insertion part (20), wherein the operating part (10) comprises a control device, and the insertion part (20) comprises an insertion tube (30), a snake bone (30) and a head end (50) connected in sequence, Features: The control device comprises an operating handle (2), the operating handle (2) comprising an operating end (21) and a snake bone connecting end (22), the operating end (21) being provided with a rotatable wire turntable (24) and a wire through hole (25) cooperating with the wire turntable (24), a wire (4) having one end located on the wire turntable (24) and the other end extending out of the snake bone connecting end (22) and connected to the snake bone being passed through the wire through hole (25), the wire (4) being able to control the snake bone (30) under the rotation of the wire turntable (24); The snake bone (30) comprises a special-shaped snake bone component, wherein the special-shaped snake bone component comprises a plurality of snake bone segments (1) connected in sequence by steel wires, the snake bone segment (1) is tubular and has a working cavity (101) formed therein, and the two end surfaces of the snake bone segment (1) are respectively a matching convex surface (102) and a matching concave surface (103) matching with the end surfaces of adjacent snake bone segments (1), and when the matching convex surface (102) on the adjacent snake bone segments (1) abuts against the matching concave surface (103), a rotation angle (104) is formed between the matching convex surface (102) and the matching concave surface (103); The wire turntable (24) is integrally formed, and comprises a disk body (306), and an outer ring wall (301) and an inner ring wall (302) that are spaced and coaxially arranged, wherein the inner ring wall (302) is arranged at the edge of the disk body (306), and the outer ring wall (301) is arranged on the outer side of the disk body (306), and a gap channel (303) is formed between the inner surface of the outer ring wall (301) and the outer surface of the inner ring wall (302), and an upper limit block (304) and a lower limit block (305) are respectively arranged on the upper and lower sides of the gap channel (303), and a wire through hole (25) is formed in the gap channel (303) between the upper limit block (304) and the lower limit block (305).

2. An endoscope with a special-shaped snake bone component according to claim 1, Features: A steel wire channel (105) for the steel wire to pass through is provided on the inner side of the snake bone joint (1), and there are two steel wire channels (105) symmetrically arranged on the inner wall of the snake bone joint (1).

3. An endoscope with a special-shaped snake bone component according to claim 1 or 2, Features: The snake bone segment (1) is a tubular body formed by punching after injection molding or extrusion.

4. An endoscope with a special-shaped snake bone component according to claim 1, Features: The mating convex surface (102) comprises two symmetrically arranged outer convex surfaces (106), and the two outer convex surfaces (106) are transitionally connected via an outer convex arc surface (107); the mating concave surface (103) comprises two symmetrically arranged inner concave surfaces (108), and the two inner concave surfaces (108) are transitionally connected via an inner concave arc surface (109); when the outer convex arc surface (107) on the adjacent snake bone joints (1) abuts against the inner concave arc surface (109), a rotation angle (104) is formed between the outer convex surface (106) and the inner concave surface (108).

5. An endoscope with a special-shaped snake bone component according to claim 1, Features: The operating end (21) is provided with a mounting ring sleeve (23), and the wire turntable (24) is rotatably mounted in the mounting ring sleeve (23). The side wall of the wire turntable (24) is provided with an annular wire groove (201) whose opening faces the mounting ring sleeve (23), and the annular wire groove (201) and the inner surface of the mounting ring sleeve (23) together form a wire through hole (25).

6. An endoscope with a special-shaped snake bone component according to claim 5, Features: The wire turntable (24) comprises a rotating disk (204) located in the mounting ring sleeve (23) and a driving disk (205) connected to the rotating disk (204) via a connecting shaft, and a shifting block (206) for shifting the driving disk (205) to rotate is connected to the driving disk (205).

7. An endoscope with a special-shaped snake bone component according to claim 1, Features: The operating end (21) is provided with a mounting ring sleeve (23), and the wire turntable (24) is rotatably arranged in the mounting ring sleeve (23). The mounting ring sleeve (23) and the upper end surface of the outer ring wall (301) are both provided with a wire extension opening (307) for the steel wire (4) to pass through the steel wire through hole (25) and then pass through the snake bone connecting end (22). The lower end surface of the steel wire extension opening (307) on the outer ring wall (301) is flush with the upper end surface of the lower limit block (305).

8. An endoscope with a special-shaped snake bone component according to claim 1, Features: A steel wire fixing portion (26) is provided on the steel wire rotating disk (24), and an end portion of the steel wire (4) is limited to the steel wire fixing portion (26).

9. An endoscope with a special-shaped snake bone component according to claim 1, Features: A steel wire guide groove (29) is provided in the operating handle (2) and between the operating end (21) and the snake-bone connecting end (22). The steel wire (4) passes through the steel wire through hole (25) and reaches the snake-bone connecting end (22) through the steel wire guide groove (29).

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