Medical endoscope

Abstract

The present application relates to the technical field of medical apparatus and instruments, and provides a medical endoscope, which comprises a handle and an insertion part, the insertion part has a cavity, the proximal end of the insertion part is connected with the handle, the insertion part comprises a head end part, a bending part and a rigid part which are sequentially connected from the distal end to the proximal end, and the bending part comprises a snake bone, a braided layer and a first elastic layer which are sequentially connected in a close fit manner from the inside to the outside. The insertion part with the structure meets the requirements of compliance and effectively improves the supportability, can be better applied to application scenarios with greater implantation difficulty, the insertion part with the structure is more suitable for the operation of a handheld handle, improves the portability of the medical endoscope, and enables the medical endoscope to be operated at a bedside or a bronchoscope room.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a medical endoscope. Background Technology

[0002] A medical endoscope is an instrument that allows observation of the internal tissues and organs of the human body. Its tip is equipped with an image acquisition module, which needs to be implanted into the tissue to observe the internal tissues and organs.

[0003] Existing implants typically connect to the operating unit via a flexible tube, which adapts to the tissue channel to be implanted. While the flexible tube offers good conformability, it provides poor support and is not suitable for applications with complex implantation procedures.

[0004] Therefore, a medical endoscope is needed that meets the requirements of compliance and support. Summary of the Invention

[0005] The purpose of this invention is to provide a medical endoscope whose insertion part not only meets the requirements of compliance but also effectively improves support, making it more suitable for application scenarios where implantation is difficult. At the same time, the insertion part of this structure is also more suitable for handheld operation, improving the portability of the medical endoscope and enabling it to be operated at the bedside or in the bronchoscopy room.

[0006] This invention provides a medical endoscope, a handle, and an insertion part;

[0007] The insertion part has a cavity, and the proximal end of the insertion part is connected to the handle. The insertion part includes a head end, a curved part, and a rigid part connected sequentially from the distal end to the proximal end.

[0008] The curved portion includes a snake bone, a braided layer, and a first elastic layer that are sequentially bonded together from the inside out.

[0009] Optionally, the length of the curved portion is greater than the length of the head end, and the length of the rigid portion is greater than the length of the curved portion.

[0010] Optionally, the head end is made of polyphenylene sulfone resin; and / or, the first elastic layer is made of fluororubber or silicone rubber; and / or, the braided layer is a metal braided layer; and / or, the snake bone is a flexible stainless steel tube.

[0011] Optionally, the medical endoscope further includes a bending control mechanism and a pull wire. One end of the pull wire is located inside the cavity of the insertion part and connected to the bending part. The other end of the pull wire is connected to the bending control mechanism, which is mounted on the handle for pulling the pull wire to control the bending of the bending part.

[0012] Optionally, the snake bone has an independent pull wire cavity, and one end of the pull wire passes through the pull wire cavity.

[0013] Optionally, the rigid part is coated with a hydrophilic coating or an antibacterial coating.

[0014] Optionally, the rigid portion includes a rigid layer and a second elastic layer that are sequentially bonded together from the inside to the outside.

[0015] Optionally, the second elastic layer is made of thermoplastic polyurethane elastomer rubber or block polyetheramide resin; and / or, the rigid layer is made of stainless steel tubing.

[0016] Optionally, the insertion part further includes an anti-breakage part, the outer diameter of which gradually increases from the distal end to the proximal end; the distal end of the anti-breakage part is connected to the proximal end of the rigid part, the proximal end of the anti-breakage part is connected to the handle, and the anti-breakage part is made of an elastic material.

[0017] Optionally, the head end portion includes a head end body;

[0018] The proximal end of the head body is connected to the distal end of the snake bone. The distal end of the head body is provided with an instrument channel hole, and the proximal end of the head body is provided with a forceps tube assembly hole. The instrument channel hole and the forceps tube assembly hole are axially connected. The radial inner dimension of the forceps tube assembly hole is larger than the radial inner dimension of the instrument channel hole. The central axis of the head body is a first axis, and the central axis of the forceps tube assembly hole is a second axis. The second axis is set at an angle to the first axis, and from the distal end to the proximal end of the head body, the second axis gradually approaches the first axis.

[0019] Optionally, the distal end of the head body is further provided with a CMOS mounting hole, and the proximal end of the head body is further provided with a wire-passing hole. The CMOS mounting hole and the wire-passing hole are axially connected. The radial inner dimension of the CMOS mounting hole is larger than the radial inner dimension of the wire-passing hole. The central axis of the CMOS mounting hole is a third axis, and the central axis of the wire-passing hole is a fourth axis. The fourth axis and the second axis are respectively located on the radial sides of the first axis. The fourth axis is set at an angle to the first axis, and from the distal end to the proximal end of the head body, the fourth axis gradually moves away from the first axis.

[0020] Optionally, the head end body is further provided with a beam aperture, which extends from the proximal end to the distal end of the head end body. The proximal end of the head end body has a guiding surface, which is used to guide the light guide element into the beam aperture.

[0021] Optionally, the head end body is divided into an implantation part and an assembly part in the direction from the distal end to the proximal end. The outer diameter of the implantation part is larger than the outer diameter of the assembly part. The assembly part has an annular assembly boss extending in the circumferential direction at the axial middle position. The assembly part is inserted into the snake bone and is axially positioned by the assembly boss.

[0022] Optionally, the medical endoscope further includes a CMOS image module, signal lines, and a noise reduction capacitor. The CMOS image module is installed in the CMOS mounting hole, the signal lines pass through the cavity of the insertion part and are communicatively connected to the CMOS image module, and the noise reduction capacitor is disposed between the CMOS image module and the signal lines.

[0023] Optionally, the medical endoscope further includes a three-way body, which is mounted on the handle. The proximal end of the three-way body has an inlet jaw, and the distal end of the three-way body has an outlet jaw. The outlet jaw communicates with the instrument channel hole. The three-way body has a suction port. The inlet jaw and the outlet jaw communicate to form a first channel. The centerline of the inlet jaw and the centerline of the outlet jaw form an angle. The centerline of the outlet jaw extends along the axial direction of the rigid part. The suction port communicates with the first channel.

[0024] Optionally, the handle is provided with a forceps inlet and a suction port. The forceps inlet is connected to the forceps port through a forceps inlet assembly, and the suction port is connected to the suction port through a suction tube.

[0025] Optionally, the radial cross-sectional area of ​​the first channel gradually decreases from a predetermined position between the inlet jaw and the outlet jaw towards the inlet jaw and the outlet jaw, respectively.

[0026] Optionally, the suction port is located between the set position and the inlet jaw.

[0027] Optionally, the medical endoscope further includes an illumination assembly disposed on the handle. The illumination assembly includes a light source and a light guide, the light guide passing through the cavity of the insertion portion to conduct the light emitted by the light source to the tip.

[0028] Optionally, the lighting assembly further includes a lighting base and a heat sink, wherein the light source is disposed on the lighting base and the heat sink is disposed on the lighting base for dissipating heat from the light source.

[0029] Optionally, the lighting assembly further includes a light-concentrating cover, the light source is located inside the light-concentrating cover, and the light guide has a light inlet located at the focal point where the light emitted by the light source is focused by the light-concentrating cover.

[0030] Optionally, a focusing groove is provided on the side of the heat sink near the lighting base, the light source and the focusing cover are located in the focusing groove, and the light inlet of the light guide extends into the focusing groove.

[0031] In this invention, the segmented design of the insertion part satisfies the requirements of compliance while effectively improving its support, making it more suitable for application scenarios where implantation is more difficult. At the same time, the insertion part of this structure is also more suitable for handheld operation, improving the portability of the medical endoscope and enabling the medical endoscope to be operated at the bedside or in the bronchoscopy room.

[0032] Furthermore, by improving the head end body, the present invention sets the second axis b at an angle relative to the first axis a, which effectively reduces the outer diameter of the head end body while keeping the sizes of the instrument channel hole and the forceps tube assembly hole unchanged. This effectively improves the space utilization of the head end body itself. While reducing the outer diameter of the head end body, the outer diameter of the snake bone can also be adaptively reduced, thereby reducing the outer diameter of the entire insertion part. The size of the insertion part can be controlled within 3-5mm, allowing for the use of a puncture sheath for dilation before endoscope insertion. This reduces the incision required for endoscopic implantation, lowers the probability of complications, and improves upon the shortcomings of existing methods that require scalpel incisions before endoscope insertion, resulting in large trauma and high costs. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the overall structure of a medical endoscope according to an embodiment of the present invention;

[0034] Figure 2 This is a schematic diagram of the internal structure of a medical endoscope according to an embodiment of the present invention;

[0035] Figure 3 This is a cross-sectional structural diagram of the curved portion according to an embodiment of the present invention;

[0036] Figure 4 This is a cross-sectional structural diagram of the rigid part according to an embodiment of the present invention;

[0037] Figure 5 This is a schematic diagram of the assembly structure of the head end of an embodiment of the present invention;

[0038] Figure 6 This is a schematic diagram of the three-dimensional structure of the head end of an embodiment of the present invention. Figure 1 ;

[0039] Figure 7 This is a cross-sectional view of the head end of an embodiment of the present invention;

[0040] Figure 8 This is a schematic diagram of the three-dimensional structure of the head end of an embodiment of the present invention. Figure 2 ;

[0041] Figure 9 This is an exploded view of the assembly structure of the tee fitting according to an embodiment of the present invention;

[0042] Figure 10 This is a schematic diagram of the tee structure according to an embodiment of the present invention;

[0043] Figure 11 This is a schematic diagram of the assembly structure of the tee fitting according to an embodiment of the present invention;

[0044] Figure 12 for Figure 11 A schematic diagram of the AA cross-sectional structure;

[0045] Figure 13 This is a schematic diagram of the assembly structure of the lighting component according to an embodiment of the present invention;

[0046] Figure 14 for Figure 13 Schematic diagram of the BB cross-section structure.

[0047] The reference numerals in the attached figures are as follows:

[0048] 100-Handle; 101-Fist channel inlet; 102-Suction interface; 103-Suction button; 104-Image button; 110-Handle body; 120-Grip part; 130-Fist channel inlet assembly; 140-Suction tube; 150-Fist channel tube; 160-Signal cable; 170-Pull cable sleeve; 180-Fist channel outlet assembly; 190-Main unit connector;

[0049] 200-Insertion section;

[0050] 210 - Head tip; 211 - Head body; 2111 - Implantation section; 2112 - Assembly section; 212 - Instrument channel hole; 213 - Forceps tube assembly hole; 214 - CMOS mounting hole; 2141 - Square recess; 215 - Wiring hole; 216 - Beam hole; 217 - Guide surface; 218 - Assembly boss;

[0051] 220 - Bending section; 221 - Snake bone; 222 - Braided layer; 223 - First elastic layer; 224 - Pull-out cavity;

[0052] 230 - Hard part; 231 - Hard layer; 232 - Second elastic layer;

[0053] 240 - Anti-breakage section;

[0054] 300 - Bending control mechanism; 301 - Guiding cable;

[0055] 400 - Three-way body; 401 - Inlet jaws; 402 - Outlet jaws; 403 - Suction port;

[0056] 500 - Lighting assembly; 501 - Light source; 502 - Light guide; 503 - Lighting base; 504 - Heat sink; 505 - Focusing cover; 506 - Fixing plate; 507 - Column; 508 - Groove; 509 - Focusing slot;

[0057] a - First axis; b - Second axis; c - Third axis; d - Fourth axis; e - Set position;

[0058] The wall thickness at point LA. Detailed Implementation

[0059] The endoscope proposed in this invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of this invention will become clearer from the following description. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of this invention.

[0060] In this invention, "outer diameter" and "inner diameter" refer to the diameter of a circular structure, while for a non-circular structure, the inner diameter refers to the diameter of its inscribed circle and the outer diameter refers to the diameter of its circumscribed circle. "Axial direction" refers to the direction of the central axis of a cylindrical channel, while for a non-cylindrical channel, the axial direction refers to the length direction of the channel.

[0061] In this invention, "proximal" and "distal" refer to the relative orientation, position, and direction of components or actions relative to each other from the perspective of the operator using the product. Although "proximal" and "distal" are not restrictive, "proximal" usually refers to the end of the product that is closer to the operator during normal operation, while "distal" usually refers to the end that first enters the patient's body.

[0062] In this invention, the definition of parallel and perpendicular should not be narrowly interpreted as an absolutely perpendicular or absolutely parallel relationship. Rather, it should be understood as allowing for a set angular error under the premise of corresponding perpendicularity or parallelism. This set angle is usually ±5°, and the specific value of the set angle is determined according to the required operating conditions.

[0063] As used in this invention, the singular forms “a,” “an,” and “the” include plural objects; the term “or” is generally used to mean “and / or”; the term “a number” is generally used to mean “at least one”; and the term “at least two” is generally used to mean “two or more”. Furthermore, the terms “first,” “second,” and “third” are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with “first,” “second,” or “third” may explicitly or implicitly include one or at least two of that feature. Additionally, as used in this invention, “installed,” “connected,” “joined,” and “set” on one element by another should be interpreted broadly, generally indicating only a connection, coupling, mating, or transmission relationship between the two elements, which can be direct or indirect through an intermediate element. They should not be construed as indicating or implying a spatial positional relationship between the two elements, i.e., one element can be located inside, outside, above, below, or to one side of another element, unless otherwise explicitly stated. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances. Furthermore, directional terms such as above, below, up, down, upward, downward, left, right, etc., are used relative to exemplary embodiments as shown in the figures, with upward or up direction pointing towards the top of the corresponding figure, and downward or down direction pointing towards the bottom of the corresponding figure.

[0064] Please refer to Figure 1 and Figure 2 As shown, this embodiment provides a medical endoscope, which includes a handle 100, an insertion part 200, a bending control mechanism 300, a three-way body 400, an illumination component 500, a CMOS image module, signal lines, and noise reduction capacitors, among other components.

[0065] The handle 100 includes a connected handle body 110 and a grip portion 120, with an included angle of 90° to 150° between the handle body 110 and the grip portion 120. The handle 100 has a gun-shaped design, and the included angle between the handle body 110 and the grip portion 120 is the angle between their length directions. When the entire endoscope is used as a reference, this included angle corresponds to... Figure 1 The included angle γ is 90° to 150°, preferably 120°. The specific included angle can be adjusted according to the actual use scenario. The medical endoscope with this structure is easy to operate by hand, and allows the user to perform the implantation operation more comfortably, and has a wider field of view.

[0066] The handle 100 also integrates components such as a bending control mechanism 300, a clamp inlet 101, a suction interface 102, a suction button 103, and an image button 104, which are described in detail below.

[0067] Please continue to refer to this. Figure 1 As shown, the insertion part 200 has a cavity, and the proximal end of the insertion part 200 is connected to the distal end of the handle body 110. The insertion part 200 includes a tip 210, a curved part 220, a rigid part 230, and a breakage-resistant part 240 connected sequentially from the distal end to the proximal end. The curved part 220 is mainly designed to improve the compliance of the insertion part 200, allowing it to better bend and adapt to the surrounding tissue structure during implantation. The tip 210 is the shortest, the rigid part 230 is the longest, and the length of the curved part 220 is between the tip 210 and the rigid part 230. The position of the curved part 220 is determined based on usage requirements. This structure of the insertion part 200 satisfies the compliance requirements through the curved part, while also effectively improving its support through the rigid part 230. It is better suited for applications with greater implantation difficulty. At the same time, this structure of the insertion part 200 is also more suitable for operation with the handheld handle 100, improving the portability of the medical endoscope and enabling the medical endoscope to be operated at the bedside or in the bronchoscopy room.

[0068] Please refer to Figure 1 and Figure 2 As shown, the anti-breakage portion 240 gradually increases in outer diameter from its distal end to its proximal end; the distal end of the anti-breakage portion 240 is connected to the proximal end of the rigid portion 230, and the proximal end of the anti-breakage portion 240 is connected to the handle 100. The anti-breakage portion 240 is made of an elastic material. The anti-breakage portion 240 is preferably a buffer structure made of silicone rubber, which can provide support to the proximal end of the rigid portion 230 while allowing the rigid portion 230 to sway slightly with the elastic deformation of the anti-breakage portion 240, thereby preventing the proximal end of the rigid portion 230 from breaking.

[0069] In this invention, the bending of the bending portion 220 is actively controlled by setting a bending control mechanism 300 and a pull wire 301. One end of the pull wire 301 is located in the cavity of the insertion portion 200 and connected to the bending portion 220, while the other end of the pull wire 301 is connected to the bending control mechanism 300. The bending control mechanism 300 is mounted on the handle 100 and is used to pull the pull wire 301 to control the bending of the bending portion 220. When the bending control mechanism 300 tightens the pull wire 301, the pull wire 301 pulls the bending portion 220, causing the bending portion to bend adaptively, thereby achieving the effect of actively controlling the bending of the insertion portion 200. The bending control mechanism 300 can be a bending control wheel or a linear lifting structure. The bending control mechanism 300 is an existing structure and will not be described in detail here.

[0070] Please refer to Figure 3 As shown, the bending portion 220 includes a snake-like skeleton 221, a braided layer 222, and a first elastic layer 223, which are sequentially bonded together from the inside to the outside. The snake-like skeleton 221 adopts a flexible stainless steel tube structure. The first elastic layer 223 has good softness and elasticity. The first elastic layer 223 is preferably made of a material with elasticity priority over softness, such as fluororubber or silicone rubber tube, and the appropriate wall thickness of the first elastic layer 223 is ensured to protect the snake-like skeleton 221 and the braided layer 222. During the bending process of the bending portion 220, the first elastic layer 223 can adaptably deform, which can ensure that no obvious wrinkles appear on the outside of the bending portion 220 during the bending action. Furthermore, the braided layer 222 can be a metal braided structure or a spring tube structure formed by bending and braiding spring steel. The braided layer 222 ensures the structural strength and bending characteristics of the bent portion 220 while also isolating it between the first elastic layer 223 and the snake bone 221. This prevents the snake bone 221 from directly contacting the first elastic layer 223, thus preventing the first elastic layer 223 from detaching or deforming during bending. The braided layer 222 also protects the snake bone 221, improving the durability of the bent portion 220. The isolation effect of the braided layer 222 also prevents the first elastic layer 223 from embedding into the gaps of the snake bone due to deformation, thus affecting the bending action of the snake bone.

[0071] Please refer to Figure 4 As shown, the rigid portion 230 includes a rigid layer 231 and a second elastic layer 232 that are sequentially bonded together from the inside out. The rigid portion 230 has better rigidity than the bent portion 220, allowing the insertion portion 200 to penetrate more easily into the target location. The rigid layer 231 can be a stainless steel pipe, other metal pipes, or other rigid materials, and the second elastic layer 232 can be made of thermoplastic polyurethane elastomer rubber or block polyetheramide resin, etc., and the second elastic layer 232 can be tightly bonded to the rigid layer 231. Furthermore, the outer layer of the rigid portion 230 can be coated with a hydrophilic coating, an antibacterial coating, or other types of coatings; different coatings are suitable for different usage environments.

[0072] Please continue to refer to this. Figure 4As shown, the inner cavity of the curved portion 220 and the inner cavity of the rigid portion 230 are connected as part of the cavity of the insertion portion 200. A signal line 160, a light guide 502, a pull wire 301, and a clamp tube 150 are threaded through the cavity of the insertion portion 200. The snake-like structure 221 in the curved portion 220 forms an independent pull wire cavity 224 through its own deformation. The portion of the pull wire 301 passing through the curved portion 220 is threaded into the pull wire cavity 224. Preferably, there are two radially opposite pull wire cavities 224 on the snake-like structure 221, and a pull wire is threaded into each pull wire cavity 224, thus controlling the bidirectional bending of the curved portion. The rigid portion 230 has two independent pull wire sleeves 170, which are preferably fixed inside the rigid layer 231. The processing method can be laser welding, etc. The pull wire 301 passes through the rigid part 230 and is inserted into the pull wire sleeve 170. Then, the pull wire 301 passes through the anti-breakage part 240 and is connected to the bending control mechanism 300. The signal wire 160, the light guide 502 and the clamp tube 150 are described in detail below in conjunction with other components, and will not be repeated here.

[0073] Please refer to Figures 5 to 8 The diagram shown is a schematic diagram of the head end portion 210.

[0074] The head end portion 210 includes a head end body 211. The head end body 211 is preferably made of polyphenylene sulfone resin, which has high transparency, high hydrolytic stability, and can withstand repeated steam sterilization. The head end body 211 is used to assemble components such as mounting tubes, CMOS modules, optical fibers, and lenses. Due to the transparency of the head end body 211, it facilitates observation of the assembly process and also allows light to pass through.

[0075] The proximal end of the head end body 211 is connected to the distal end of the snake bone 221. The distal end of the head end body is provided with an instrument channel hole 212, and the proximal end of the head end body is provided with a forceps tube assembly hole 213. The instrument channel hole 212 and the forceps tube assembly hole 213 are axially connected. The radial inner dimension of the forceps tube assembly hole 213 is larger than the radial inner dimension of the instrument channel hole 212. The central axis of the head end body 211 is a first axis a, and the central axis of the forceps tube assembly hole 213 is a second axis b. The second axis b is set at an angle to the first axis a, and from the distal end to the proximal end of the head end body 211, the second axis b gradually approaches the first axis a.

[0076] Furthermore, the distal end of the head body is provided with a CMOS mounting hole 214, and the proximal end of the head body is provided with a wire-passing hole 215. The CMOS mounting hole 214 and the wire-passing hole 215 are axially connected. The radial inner dimension of the CMOS mounting hole 214 is larger than the radial inner dimension of the wire-passing hole 215. The central axis of the CMOS mounting hole 214 is the third axis c, and the central axis of the wire-passing hole 215 is the fourth axis d. The fourth axis d and the second axis b are respectively located on the radial sides of the first axis a. The fourth axis d is set at an angle to the first axis a, and from the distal end to the proximal end of the head body, the fourth axis d gradually moves away from the first axis a.

[0077] In this embodiment, the instrument channel hole 212 and the forceps tube assembly hole 213 are coaxially arranged, that is, the common central axis of the instrument channel hole 212 and the forceps tube assembly hole 213 is the second axis; in other alternative embodiments, the central axis of the instrument channel hole 212 and the central axis of the forceps tube assembly hole 213 can be set with an appropriate angle according to the actual structure.

[0078] In this embodiment, when the through hole is circular, the central axis is its center line; when the through hole is non-circular, the central axis corresponds to the line connecting the centers of the inscribed circles of each radial section of the through hole.

[0079] The head end can be made of metal, rigid plastic, or ceramic, etc. A CMOS image module is installed in the CMOS mounting hole 214. To prevent lateral light leakage from the CMOS image module, a light-blocking layer is wrapped around the outside of the CMOS image module. The light-blocking layer is preferably made of dark-colored PET heat-shrink tubing. The PET heat-shrink tubing is adhered to the outside of the CMOS image module with sealing adhesive to ensure the insulation of the electronic components and enhance electrical safety. The CMOS image module is typically square in structure; therefore, a square recess 2141 is provided at the far end of the CMOS mounting hole 214. The side length of the square recess 2141 is greater than the radial inner dimension of other parts of the CMOS mounting hole 214. Please refer to... Figure 6 As shown, the right-angle position of the square recess 2141 has the minimum wall thickness between it and the outer circular surface of the head end body 211. The size of the square recess 2141 is adapted to the size of the CMOS image module. The instrument channel hole 212 needs to meet the passage of the implanted instrument. Once the size of the square recess 2141 and the instrument channel hole 212 is determined, their optimal arrangement position is determined. On the distal end face of the head end body 211, the radial line connecting the geometric center of the square recess 2141 and the center of the instrument channel hole 212 passes through the center of the distal end face, which is the optimal layout. At this time, the space of the head end body 211 can be maximized.

[0080] Please refer to Figure 7As shown, the clamp tube assembly hole 213 is used to assemble with the clamp tube 150. The inner diameter of the clamp tube 150 is usually the same as the inner diameter of the instrument channel hole 212. After the clamp tube 150 is inserted into the clamp tube assembly hole 213, the inner cavity of the clamp tube 150 conformally aligns with the instrument channel hole 212 to form a complete channel. On the distal surface of the head end body 211, the center position of the instrument channel hole 212 is preferentially determined. Based on this, the common central axis of the instrument channel hole 212 and the forceps tube assembly hole 213, i.e., the second axis b, is inclined relative to the first axis a of the head end body 211 itself. The distance from the distal port position A of the forceps tube assembly hole 213 to the wall thickness L of the outer circular surface of the head end body 211 is the smallest. Therefore, the minimum size of the wall thickness L determines the minimum outer diameter of the head end body 211. Due to the inclined setting of the second axis b in this embodiment, the proximal end of the channel formed by the instrument channel hole 212 and the forceps tube assembly hole 213 swings towards the first axis a with the center point of the distal surface of the head end body 211 as a reference. Figure 7 If the wall thickness L is effectively increased (by swinging to the right), then the outer diameter requirement for the head end body 211 becomes smaller; if the second axis b maintains its existing arrangement, i.e., the second axis b is parallel to the first axis a, then it is necessary to... Figure 7 Based on this, the proximal end of the channel formed by the instrument channel hole 212 and the forceps tube assembly hole 213 swings away from the first axis a, with the center point at the distal end face of the head end body 211 as the reference. Figure 7 If the wall thickness L swings to the left, it will become smaller or even negative. In this case, the outer diameter of the head end body 211 needs to be increased to ensure that the wall thickness L meets the requirements.

[0081] By setting the second axis b at an angle relative to the first axis a, the outer diameter of the head end body 211 can be effectively reduced while keeping the dimensions of the instrument channel hole 212 and the forceps tube assembly hole 213 unchanged. This effectively improves the space utilization of the head end body 211 itself. Under the premise of reducing the outer diameter of the head end body 211, the outer diameter of the snake bone 221 can also be adaptively reduced, thereby reducing the outer diameter of the entire insertion part 200. The size of the insertion part 200 can be controlled within 3-5mm, and the puncture sheath can be used to expand the endoscope for insertion. This reduces the incision required for endoscopic implantation, lowers the probability of complications, and improves the shortcomings of the existing method of requiring a scalpel incision before insertion, which results in large trauma and high cost. On the other hand, the improvement of this structure also helps to ensure that the wall thickness of the head end body 211 at various positions meets the minimum wall thickness requirement while maintaining a smaller size, which is convenient for injection molding and also helps to improve the local structural strength of the head end body 211.

[0082] The channel formed by the instrument channel hole 212 and the clamp tube assembly hole 213, along with the channel formed by the CMOS mounting hole 214 and the wire hole 215, are arranged along the radial direction of the head end body 211, corresponding to... Figure 7 As shown, the third axis c and the fourth axis d are located to the right of the first axis a, and the second axis b is located to the left of the first axis a. Since the inner diameter of the clamp tube mounting hole 213 is large and its inclined arrangement encroaches on part of the space of the head end body 211 to the right, the radial inner dimension of the wire hole 215 is adaptively reduced. The radial inner dimension of the wire hole 215 is smaller than the radial inner dimension of the CMOS mounting hole 214. At the same time, the inclination of the fourth axis d also causes the wire hole 215 to avoid to the right, thus ensuring that the wall thickness between the wire hole 215 and the clamp tube mounting hole 213 meets the requirements. The wire hole 215 is used to pass through the CMOS signal line, so the requirement for the radial inner dimension of the wire hole 215 is smaller than the requirement for the radial inner dimension of the CMOS mounting hole 214. Therefore, the smaller radial inner dimension of the wire hole 215 also meets the usage requirements.

[0083] In this embodiment, the opening shape of the instrument channel hole 212, the forceps tube assembly hole 213, the CMOS mounting hole 214, and the wire hole 215 is not limited. In order to adapt to the assembly of other existing components, the instrument channel hole 212 and the forceps tube assembly hole 213 are set as round holes, the far end of the CMOS mounting hole 214 is set as a square hole, the other positions of the CMOS mounting hole 214 are round holes, and the wire hole 215 is set as an elliptical hole.

[0084] In this embodiment, the angle α between the first axis a and the second axis, and the angle β between the fourth axis d and the first axis a, are not limited. Preferably, the angles α and β are 2 to 5°. In this embodiment, the fourth axis is parallel to the second axis. Therefore, the angles α and β are equal, preferably 2°. This ensures that the mounting hole 213 and the threading hole 215 are parallel, resulting in approximately uniform wall thickness between them.

[0085] Please continue to refer to this. Figures 5 to 8As shown, the head end body 211 is also provided with a beam aperture 216, which extends from the proximal end to the distal end of the head end body 211. The proximal end of the head end body 211 has a guiding surface 217, which guides the light guide component 502 into the beam aperture. The light guide component 502 is used in conjunction with the light source 501, as detailed below, and will not be repeated here. In this embodiment, the beam aperture 216 is a circular hole and there are two of them, located on either side of the wire hole 215. Furthermore, the structure of the guiding surface 217 is not limited here; for example, it can be a curved surface or a plane. The guiding surface can be parallel to the central axis of the beam aperture 216 or at an angle to the central axis of the beam aperture 216. The guiding surface 217 facilitates the guidance of the light guide component 502 into the beam aperture 216, making the assembly of the head end body 211 easier.

[0086] Please continue to refer to this. Figures 5 to 8 As shown, the head end body 211 is divided into an implantation part 2111 and an assembly part 2112 from the distal end to the proximal end. The outer diameter of the implantation part 2111 is larger than the outer diameter of the assembly part 2112. The assembly part 2112 has an annular mounting boss 218 extending circumferentially at its axial midpoint. The assembly part 2112 is inserted into the snake bone 221 and is axially positioned by the mounting boss 218. The assembly part 2112 is divided into two regions axially by the mounting boss 218. The region near the proximal end of the head end body 211 is inserted into the distal end of the snake bone 221, and the distal end of the snake bone 221 is automatically positioned against the mounting boss 218. Then, a rubber tube is fitted onto the other region of the assembly part 2112, and then wire is tied and glue is applied to ensure good sealing performance.

[0087] In addition, a CMOS image module is installed in the CMOS mounting hole 214 for image acquisition. The signal line 160 is connected to the CMOS image module through the wire hole 215. A noise reduction capacitor is provided between the CMOS image module and the signal line. The CMOS image module converts the acquired optical signal into an electrical signal, and then transmits the acquired signal to the electronic endoscope image processor or tablet processor for processing through the signal line 160.

[0088] A CMOS image module is a module component consisting of an image sensor and an optical lens packaged together. It is used to acquire image light signals and convert them into electrical signals. Its core design elements—photoelectric conversion function and optical circuit design parameters—depend on the component model and actual application requirements, and will not be elaborated here. The analog signals of a CMOS image module are relatively fragile and easily affected by external interference and signal attenuation during transmission. Therefore, a coaxial cable is preferred for the 160mm signal line. A coaxial cable is a composite layer cable with an outer shielding layer. Simultaneously, to prevent excessively long power supply lines, the CMOS head end can experience power supply noise during signal transmission. Adding noise-reducing capacitors can suppress power supply ripple noise and reduce analog signal interference.

[0089] Please refer to Figures 9 to 12 The diagram shown is a schematic diagram of the relevant structure of the three-way body 400.

[0090] Please refer to Figure 2 , Figure 9 and Figure 10 As shown, a three-way body 400 is mounted on the handle body 110 of the handle 100. The proximal end of the three-way body 400 has an inlet jaw 401, and the distal end has an outlet jaw 402. A suction port 403 is also provided on the three-way body. The handle 100 is provided with a jaw passage inlet 101 and a suction port 102. A suction button 103 is also provided on the grip 120 next to the suction port 102 for controlling suction. The jaw passage inlet 101 communicates with the inlet jaw 401 through a jaw passage inlet assembly 130, and the suction port 102 communicates with the suction port 403 through a suction tube 140. The clamp inlet assembly 130 can be a single-tube structure or a composite structure consisting of a three-way clamp inlet connector, a sealing ring, a clamp valve body, a clamp valve sealing gasket, a valve body limiting block, and a clamp valve body cap. The clamp outlet 402 is connected to one end of the clamp tube 150 through the clamp outlet assembly 180. The other end of the clamp tube 150 is connected to the head end 210 through the cavity of the insertion part 200 and is connected to the proximal end of the head end body 211. The inner cavity of the clamp tube 150 is connected to the clamp tube assembly hole 213 (see details). Figure 7 This allows surgical instruments to extend from the inlet 401 to the head end 211. The outlet assembly 180 can be a single-tube structure or a composite structure consisting of a connector pressure ring and a connector cap. Both the inlet assembly 130 and the outlet assembly 180 can use existing structures, which will not be described in detail here.

[0091] Please refer to Figure 11The inlet jaw 401 and the outlet jaw 402 are connected to form a first channel. The suction port 403 is connected to the first channel. The centerline of the inlet jaw 401 and the centerline of the outlet jaw 402 form an angle. The centerline of the outlet jaw 402 extends along the axial direction of the rigid part 230. Here, the axial direction of the rigid part 230 refers to the axial direction of the rigid part 230 in its natural state without external force. Please refer to... Figure 11 As shown, the angle between the opening direction of the inlet jaw 401 and the opening direction of the outlet jaw 402 is δ. The angle δ is preferably 15-30°, and in this embodiment it is 22°. This angle setting makes the angle between the axis of the jaw channel inlet assembly 130 and the axis of the jaw channel outlet assembly 180 also δ. When the operator uses this endoscope, the angle of the inlet jaw can be directly facing the operator, which is convenient for performing surgical biopsies and other operations that require the insertion of instruments, and is beneficial to simultaneously consider the implantation direction and the operation direction.

[0092] Please refer to Figure 12 As shown, the first channel has a gradually decreasing radial cross-sectional area from the designated position e between the inlet jaw 401 and the outlet jaw 402 toward both the inlet jaw 401 and the outlet jaw 402. The suction port 403 is located between the designated position e and the inlet jaw 401. The first channel, formed by the inlet jaw 401 and the outlet jaw 402, has a spindle-shaped structure near its distal end. The radial cross-sectional area of ​​the first channel gradually decreases from the set position e towards the inlet jaw 401 and from the set position e towards the outlet jaw 402. The specific location of the set position e is not limited; it is sufficient to ensure that the first channel, either entirely or partially, has a spindle-shaped structure. Near its proximal end, the first channel is divided into equal-diameter channels. When an instrument enters the spindle-shaped area through the equal-diameter channel of the inlet jaw 401, the inner cavity first expands, facilitating the smooth passage of the instrument through the jaw outlet assembly 180 into the first channel. Then, the inner cavity of the first channel gradually decreases, guiding the instrument to align with the outlet jaw 402 and extend into the jaw channel tube 150. This internal structure maximizes the smooth and stable extension of the instrument from the outlet jaw 402 into the jaw channel tube after it enters the jaw channel tee, effectively ensuring the smoothness of the jaw movement.

[0093] Please refer to Figure 13 and Figure 14 The diagram shown is a schematic diagram of the relevant structure of the lighting component 500.

[0094] Please refer to Figure 2 , Figure 13 and Figure 14As shown, unlike the existing method of installing the light source structure in the headpiece, in this embodiment, the light source 501 in the lighting assembly 500 is installed on the handle 100, specifically in the grip part 120. Therefore, the light source 501 is not implanted into the patient's body along with the headpiece.

[0095] The lighting component 500 is disposed on the grip portion 120. The lighting component 500 includes a light source 501 and a light guide 502. The light guide 502 passes through the cavity of the insertion portion 200 to guide the light emitted by the light source 501 to the head end portion 210. The light source 501 is generally an LED lamp, and the light guide 502 is generally an optical fiber. The optical fiber extends through the cavity of the insertion portion 200 into the beam aperture 216 of the head end portion 210 to guide the light to the head end portion for illumination. A lens can be installed in the beam aperture 216 to increase the light divergence angle and widen the illumination range, thereby improving the lighting effect. In this embodiment, the structure of the light source 501 and the light guide 502 is not limited. In other alternative embodiments, the light source 501 and the light guide 502 can also adopt other existing structures.

[0096] The lighting assembly 500 also includes a lighting base 503 and a heat sink 504. The light source 501 is disposed on the lighting base 503, and the heat sink 504 is disposed on the lighting base 503 to dissipate heat from the light source 501. In this embodiment, a PCB board is used as the lighting base 503, and the PCB board is fixed on a fixing plate 506, which is fixed to the gripping part 120. The heat sink 504 can be a heat-dissipating aluminum block or heat-dissipating fins. Since the lighting assembly 500 is disposed on the gripping part 120 and is not implanted into the patient's body along with the headpiece, the structure and installation method of the lighting assembly 500 are not limited. Therefore, a larger heat dissipation structure can be added to improve the heat dissipation effect. At the same time, the light source does not need to be implanted into the patient's body along with the headpiece, which helps to eliminate the risk of burns caused by the accumulation of heat from the light source. The CMOS image module is connected to the PCB board via signal line 160. The other end of signal line 160 passes through the cavity of insertion part 200 to the CMOS mounting hole 214 of head end 210 for communication with the CMOS image module. A host connector 190 is also provided on the grip part 120, which is connected to the PCB board for connection to a matching endoscope image processor or tablet processor, enabling image signal transmission and power supply to the CMOS image module and light source during normal use. Furthermore, for ease of control of the CMOS image module, an image button 104 is provided on the grip part 120 for handheld control.

[0097] The lighting assembly 500 further includes a light-concentrating cover 505, with the light source 501 located within the light-concentrating cover 505. The light guide 502 has a light inlet located at the focal point of the light-concentrating cover 505 where the light emitted by the light source 501 is focused. The heat sink 504 has a light-concentrating groove 509 on its side near the lighting base 503. The light source 501 and the light-concentrating cover 505 are located within the light-concentrating groove 509, and the light inlet of the light guide 502 extends into the light-concentrating groove 509.

[0098] The heat sink 504 is a block structure. Several columns 507 are provided on the lighting base 503. The columns 507 serve to position and connect the heat sink 504. The heat sink 504 is inserted into the columns 507 and attached to the lighting base 503. The focusing groove 509 covers the light source 501 and the focusing cover 505. The inner cavity of the focusing cover 505 is hemispherical and has a reflective coating to reflect and concentrate light. The opening end of the focusing cover 505 faces the bottom of the focusing groove 509. The light focusing point of the focusing cover 505 is located at the center of the inner cavity of the focusing cover 505. The light inlet of the corresponding light guide 502 is located at the focusing point.

[0099] A groove 508 is provided on the side wall opposite to the lighting base 503 on the heat sink 504. A light guide hole communicating with the light focusing groove 509 is opened at the bottom of the groove 508. The light inlet of the light guide 502 extends into the light focusing groove through the light guide hole. The light guide hole faces the opening side of the light focusing cover 505. The groove is designed to increase the heat dissipation area of ​​the heat sink 504 and also to protect the connection position between the light guide 502 and the light guide hole, preventing the light guide 502 from being damaged.

[0100] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0101] The above description is merely a description of preferred embodiments of the present invention and is not intended to limit the scope of the present invention in any way. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the protection scope of the claims.

Claims

1. A medical endoscope, characterized in that, include: Handle and insertion part; The insertion part has a cavity, and the proximal end of the insertion part is connected to the handle. The insertion part includes a head end, a curved part, and a rigid part connected sequentially from the distal end to the proximal end. The curved portion includes a snake bone, a braided layer, and a first elastic layer that are sequentially bonded together from the inside out. The head end portion includes a head end body; The proximal end of the head end body is connected to the distal end of the snake bone. The distal end of the head end body is provided with an instrument channel hole, and the proximal end of the head end body is provided with a forceps tube assembly hole. The instrument channel hole and the forceps tube assembly hole are axially connected and coaxially arranged. The radial inner dimension of the forceps tube assembly hole is larger than that of the instrument channel hole. The central axis of the head end body is a first axis, and the central axis of the forceps tube assembly hole is a second axis. The second axis is set at an angle to the first axis, and from the distal end to the proximal end of the head end body, the second axis gradually approaches the first axis, so that the wall thickness at the distal end of the forceps tube assembly hole is minimized from the outer circular surface of the head end body. The distal end of the head body is provided with a CMOS mounting hole, and the proximal end of the head body is provided with a wire hole. The CMOS mounting hole and the wire hole are axially connected. The central axis of the wire hole is a fourth axis. The fourth axis and the second axis are respectively located on the radial sides of the first axis. The fourth axis is set at an angle to the first axis, and from the distal end of the head body to the proximal end, the fourth axis gradually moves away from the first axis.

2. The medical endoscope as described in claim 1, characterized in that, The length of the curved portion is greater than the length of the head end, and the length of the rigid portion is greater than the length of the curved portion.

3. The medical endoscope as described in claim 1, characterized in that, The head end is made of polyphenylene sulfone resin; and / or, the first elastic layer is made of fluororubber or silicone rubber; and / or, the braided layer is a metal braided layer; and / or, the snake bone is a flexible stainless steel tube.

4. The medical endoscope as described in claim 1, characterized in that, The medical endoscope also includes a bending control mechanism and a pull wire. One end of the pull wire is located in the cavity of the insertion part and connected to the bending part. The other end of the pull wire is connected to the bending control mechanism. The bending control mechanism is mounted on the handle and is used to pull the pull wire to control the bending of the bending part.

5. The medical endoscope as described in claim 4, characterized in that, The snake bone has an independent pull wire cavity, and one end of the pull wire passes through the pull wire cavity.

6. The medical endoscope as described in claim 1, characterized in that, The hard part is coated with a hydrophilic coating or an antibacterial coating.

7. The medical endoscope as described in claim 1, characterized in that, The rigid portion includes a rigid layer and a second elastic layer that are sequentially bonded together from the inside out.

8. The medical endoscope as described in claim 7, characterized in that, The second elastic layer is made of thermoplastic polyurethane elastomer rubber or block polyetheramide resin; and / or, the rigid layer is made of stainless steel tubing.

9. The medical endoscope as described in claim 1, characterized in that, The insertion part also includes a breakage-resistant part, the outer diameter of which gradually increases from the distal end to the proximal end; the distal end of the breakage-resistant part is connected to the proximal end of the rigid part, the proximal end of the breakage-resistant part is connected to the handle, and the breakage-resistant part is made of an elastic material.

10. The medical endoscope as described in claim 9, characterized in that, The radial inner dimension of the CMOS mounting hole is larger than the radial inner dimension of the wire hole, and the central axis of the CMOS mounting hole is a third axis.

11. The medical endoscope as described in claim 9, characterized in that, The head end body is also provided with a beam hole, which extends from the proximal end to the distal end of the head end body. The proximal end of the head end body has a guiding surface, which is used to guide the light guide to pass into the beam hole.

12. The medical endoscope as described in claim 9, characterized in that, The head end body is divided into an implantation part and an assembly part in the direction from the distal end to the proximal end. The outer diameter of the implantation part is larger than the outer diameter of the assembly part. The assembly part has an annular assembly boss extending in the circumferential direction at the axial middle position. The assembly part is inserted into the snake bone and is axially positioned by the assembly boss.

13. The medical endoscope as described in claim 10, characterized in that, The medical endoscope also includes a CMOS image module, signal lines, and a noise reduction capacitor. The CMOS image module is installed in the CMOS mounting hole, the signal lines pass through the cavity of the insertion part and are communicatively connected to the CMOS image module, and the noise reduction capacitor is disposed between the CMOS image module and the signal lines.

14. The medical endoscope as described in claim 9, characterized in that, The medical endoscope also includes a three-way body, which is mounted on the handle. The proximal end of the three-way body has an inlet jaw, and the distal end of the three-way body has an outlet jaw. The outlet jaw communicates with the instrument channel hole. The three-way body has a suction port. The inlet jaw and the outlet jaw communicate to form a first channel. The suction port communicates with the first channel. The center line of the inlet jaw and the center line of the outlet jaw form an angle. The center line of the outlet jaw extends along the axial direction of the rigid part.

15. The medical endoscope as described in claim 14, characterized in that, The handle is provided with a clamp channel inlet and a suction port. The clamp channel inlet is connected to the clamp inlet through a clamp channel inlet assembly, and the suction port is connected to the suction port through a suction tube.

16. The medical endoscope as described in claim 14, characterized in that, The first channel has a radial cross-sectional area that gradually decreases from a predetermined position between the inlet jaw and the outlet jaw towards the inlet jaw and the outlet jaw, respectively.

17. The medical endoscope as described in claim 16, characterized in that, The suction port is located between the designated position and the inlet jaw.

18. The medical endoscope as described in claim 1, characterized in that, The medical endoscope also includes an illumination assembly disposed on the handle. The illumination assembly includes a light source and a light guide, the light guide passing through the cavity of the insertion portion to conduct the light emitted by the light source to the tip.

19. The medical endoscope as described in claim 18, characterized in that, The lighting assembly also includes a lighting base and a heat sink. The light source is disposed on the lighting base, and the heat sink is disposed on the lighting base for dissipating heat from the light source.

20. The medical endoscope as described in claim 19, characterized in that, The lighting assembly also includes a light-concentrating cover, the light source is located inside the light-concentrating cover, and the light guide has a light inlet located at the focal point where the light emitted by the light source is focused by the light-concentrating cover.

21. The medical endoscope as described in claim 20, characterized in that, A focusing groove is provided on the side of the heat sink near the lighting base. The light source and the focusing cover are located in the focusing groove, and the light inlet of the light guide extends into the focusing groove.

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