Insertion head for an endoscope and ultrasonic endoscope

Abstract

The utility model discloses an endoscope's insertion head end and ultrasonic endoscope, insertion head end includes: head end seat, which is equipped with by one partition wall and is separated and lifts the forceps installation groove and the isolated chamber, and the partition wall is equipped with the axle hole, lift the forceps fixed base, including the main part in the isolated chamber and the cylinder part in the axle hole, and the cylinder part and the axle hole sealedly connect, and the main part and the partition wall sealedly connect, lift the forceps ware rocker, is located in the forceps installation groove, lift the forceps connecting shaft, sealedly connect in the cylinder part and are located in the one end in the forceps installation groove with the forceps ware rocker fixed connection, drive steel wire, its far end stretches into the isolated chamber and with lift the forceps connecting shaft fixed connection, seal cover, sealedly connect in the open part of isolated chamber. Such setting, the isolated chamber in the head end seat can form an independent closed cavity, and the contaminant is not easy to enter the isolated chamber through the gap, and it is not needed to clean and disinfect the drive steel wire and other components in the isolated chamber, and the cleaning and disinfecting operation difficulty is low.

Description

Technical Field

[0001] This utility model relates to the field of endoscope technology, specifically to an endoscope insertion tip and an ultrasonic endoscope. Background Technology

[0002] Endoscopic ultrasound (EUS) is primarily used for the examination and treatment of the upper digestive tract and surrounding organs. Compared to conventional gastroscopy and colonoscopy, EUS can not only visualize submucosal lesions of the gastrointestinal tract but also assess the depth of tumor invasion, the presence of surrounding lymph nodes and metastases to adjacent organs. Furthermore, it enables endoscopic biopsy. The lifting forceps are a key component that rotates and lifts the biopsy needle to a specific angle to achieve the optimal puncture position.

[0003] The existing lifter mechanism of an ultrasonic endoscope mainly consists of a drive wire, a lifter crank, a lifter pin, and a lifter rocker arm. The distal end of the drive wire is connected to the lifter crank, and the proximal end is connected to the operating handle of the ultrasonic endoscope. By operating the lever on the operating handle, the drive wire moves back and forth. The drive wire, through the lifter crank and lifter pin, causes the lifter rocker arm to swing up and down within the mounting groove, thereby adjusting the angle of the biopsy needle tip located on the lifter rocker arm.

[0004] In existing clamp lifting mechanisms, the distal end of the drive wire is located in the mounting cavity of the head end seat. Contaminants can easily contaminate the drive wire in the mounting cavity. Since the drive wire is composed of multiple strands, once contaminants enter the gaps between the strands or other dead zones of the structure, the contaminants are extremely difficult to clean and effectively disinfect and sterilize, which can easily cause cross-contamination during subsequent use. Utility Model Content

[0005] Therefore, the technical problem to be solved by this utility model is to overcome the defects of the existing lifting clamp mechanism, which has poor sealing between the lifting clamp connecting shaft and the partition wall of the head end seat, making it difficult to clean and disinfect contaminants after they enter the gap of the drive steel wire or other dead corner areas of the structure, thus causing cross-contamination. This invention provides an insertion head for an endoscope.

[0006] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0007] An insertion tip of an endoscope, comprising:

[0008] The head end seat has a lifting clamp mounting slot and an isolation cavity separated by a partition wall, and the partition wall has a shaft hole that connects the lifting clamp mounting slot and the isolation cavity;

[0009] The lifting clamp fixing seat includes a main body fixedly disposed inside the isolation cavity, and a cylindrical part located on one side of the main body and extending into the shaft hole; a first sealing structure is provided between the cylindrical part and the shaft hole, and a second sealing structure is provided between the main body and the partition wall;

[0010] The lifting clamp rocker arm is located within the lifting clamp mounting slot;

[0011] A clamp lifting device drive assembly includes a clamp lifting connecting shaft and a drive wire; the clamp lifting connecting shaft is sealed and connected to the inner hole of the cylinder part; the distal end of the drive wire passes through the wire hole on the head end seat and is fixedly connected to one end of the clamp lifting connecting shaft located in the isolation cavity; the other end of the clamp lifting connecting shaft located in the clamp lifting mounting groove is fixedly connected to the clamp lifting device rocker arm; the proximal end of the drive wire is connected to the operating handle; the drive wire is used to drive the clamp lifting device rocker arm to rotate through the clamp lifting connecting shaft.

[0012] A sealing cap that seals the open portion of the isolation chamber.

[0013] Furthermore, the lifting clamp connecting shaft has an axially through hole inside; the lifting clamp rocker arm has a rocker arm connecting hole on the side facing the lifting clamp connecting shaft that corresponds to the position of the axial through hole, and the lifting clamp connecting shaft and the lifting clamp rocker arm are fixedly connected by mounting pins passing through the axial through hole and the rocker arm connecting hole.

[0014] Furthermore, the first sealing structure is a first sealant disposed between the outer wall of the cylindrical part and the wall of the shaft hole.

[0015] Furthermore, the main body has an adhesive application groove on the side facing the partition wall, and the adhesive application groove is located on the outer periphery of the cylindrical body. The second sealing structure is a second sealant that is sealed between the adhesive application groove and the partition wall. When the first sealant fails, the second sealant in the adhesive application groove can form a secondary seal, improving the sealing effect between the clamp fixing seat and the partition wall; moreover, the adhesive application groove can hold more adhesive, making it less likely for the second sealant to fail.

[0016] Furthermore, the outer periphery of the lifting clamp connecting shaft is provided with a first sealing groove, and a first sealing ring is fitted inside the first sealing groove. The outer wall of the first sealing ring abuts against the inner wall of the cylindrical part. The first sealing ring can prevent contaminants in the lifting clamp mounting groove from entering the isolation cavity through the gap between the inner hole of the cylindrical part and the outer wall of the lifting clamp connecting shaft.

[0017] Furthermore, the lifting clamp connecting shaft has a second sealing groove inside, and a second sealing ring is provided inside the second sealing groove, which is fitted around the outer periphery of the mounting pin. The outer wall of the second sealing ring abuts against the inner wall of the lifting clamp connecting shaft. The second sealing ring can prevent contaminants in the lifting clamp mounting groove from entering the isolation cavity through the gap between the outer wall of the mounting pin and the inner wall of the lifting clamp connecting shaft.

[0018] Furthermore, the gap between the sealing cap and the head end seat is sealed with a third sealant, and the sealing cap is fixedly connected to the lifting clamp fixing seat by a second screw. The method of sealing the sealing cap and the head end seat with adhesive and fixing them to the lifting clamp fixing seat with a second screw creates a good seal at the mating part. The isolation cavity of the head end seat forms an independent closed cavity, and the distal end of the drive wire is hidden inside the isolation cavity. The drive wire is not easily contaminated during use, eliminating the need to disassemble and clean the drive wire or design a special cleaning pipe for the drive wire, resulting in a simpler structure.

[0019] Furthermore, the lifting clamp rocker arm has a shaped groove on the side facing the partition wall, and the other end of the lifting clamp connecting shaft has a shaped boss that extends into the shaped groove and matches its shape. The shaped groove and the shaped boss work together to transmit the torque on the lifting clamp connecting shaft to the lifting clamp rocker arm through the mating surfaces of the shaped boss and the groove, significantly reducing the contact stress between the lifting clamp connecting shaft and the lifting clamp rocker arm, and improving the fatigue strength and service life of both.

[0020] Furthermore, the irregularly shaped groove is a polygonal groove, and at least one side of the polygonal groove is provided with a foolproof identification groove; the irregularly shaped boss is a polygonal boss, and at least one side of the polygonal boss is provided with a foolproof identification boss that corresponds to the position of the foolproof identification groove. The foolproof identification groove and the foolproof identification boss work together to ensure the uniqueness of the installation direction of the polygonal groove and the polygonal boss, avoid incorrect installation direction, and improve assembly efficiency.

[0021] Furthermore, the lifting clamp connecting shaft has a protruding steel wire connecting part at one end located in the isolation cavity, and a steel wire connecting hole is provided on the outer periphery of the steel wire connecting part. The distal end of the driving steel wire is fixedly connected to the steel wire connecting hole, and the steel wire connecting part has a steel wire avoidance notch for avoiding the driving steel wire.

[0022] Furthermore, a wire slider is fixedly connected to the side of the isolation cavity near the wire hole. The wire slider has a wire through hole for the drive wire to pass through, and the end of the wire through hole has a rounded corner. The rounded corner design at the end of the wire through hole of the wire slider can reduce the contact friction resistance between the drive wire and the wire slider, and improve the service life of the drive wire.

[0023] An ultrasonic endoscope includes an insertion tip of an endoscope as described above, the insertion tip further including an ultrasonic probe connected to the distal end of the insertion tip.

[0024] The present invention has the following advantages: By providing a cylindrical portion that can extend into the partition wall on the clamp fixing seat, the gap between the cylindrical portion and the shaft hole is sealed by a first sealing structure, and the gap between the main body of the clamp fixing seat and the partition wall is sealed by a second sealing structure. The clamp connecting shaft is sealed to the inner hole of the cylindrical portion. Compared with the prior art where the outer wall of the clamp connecting shaft and the inner wall of the shaft hole are directly sealed with a sealing ring, this clamp mechanism's installation method and sealing design, when the first sealing structure between the cylindrical portion and the shaft hole fails, allows the second sealing structure between the main body and the partition wall to form a secondary seal, ensuring a reliable seal between the clamp fixing seat and the partition wall. Therefore, the gap between the clamp connecting shaft and the clamp fixing seat, and the clamp... The gaps between the fixed base and the partition can form a reliable seal, preventing contaminants in the lifting clamp mounting slot from easily entering the isolation chamber, thus effectively isolating the drive wire from the contaminants in the lifting clamp mounting slot. Simultaneously, the sealing cap seals the open portion of the isolation chamber, forming an independent closed cavity. The distal end of the drive wire is hidden inside the isolation chamber and does not come into contact with external dirt, making the drive wire less susceptible to contamination during use. When cleaning the head end seat and lifting clamp mechanism, only the lifting clamp mounting slot and the lifting clamp rocker arm need to be cleaned and disinfected; the drive wire and other components inside the isolation chamber do not need to be cleaned and disinfected, reducing the difficulty of cleaning and disinfection operations. Furthermore, there is no need to design a separate cleaning channel for the drive wire, reducing material costs and simplifying the overall assembly process. Attached Figure Description

[0025] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 This is a front view of the plug end of the ultrasonic endoscope in an embodiment of this utility model;

[0027] Figure 2 This is a schematic diagram of the installation structure of the plug head lifting clamp mechanism in an embodiment of this utility model;

[0028] Figure 3 This is a cross-sectional view of the plug end of the ultrasonic endoscope in an embodiment of this utility model.

[0029] Figure 4 This is a three-dimensional structural diagram of the head end seat in an embodiment of this utility model;

[0030] Figure 5 This is a cross-sectional view of the head end seat in an embodiment of this utility model;

[0031] Figure 6 This is a front view of the lifting clamp fixing seat in an embodiment of the present utility model;

[0032] Figure 7 This is a schematic diagram of the back of the lifting clamp fixing seat in an embodiment of this utility model;

[0033] Figure 8 This is a three-dimensional structural diagram of the lifting clamp connecting shaft in an embodiment of the present invention. Figure 1 ;

[0034] Figure 9 This is a three-dimensional structural diagram of the lifting clamp connecting shaft in an embodiment of the present invention. Figure 2 ;

[0035] Figure 10 This is a three-dimensional structural diagram of the lifting clamp rocker arm in an embodiment of the present utility model;

[0036] Figure 11 This is a schematic diagram of the structure for installing the pins in an embodiment of this utility model;

[0037] Figure 12 This is a three-dimensional structural diagram of the sealing cap in an embodiment of the present utility model;

[0038] Figure 13 This is a three-dimensional structural diagram of the wire slider in an embodiment of this utility model.

[0039] Reference numerals in the attached drawings: 100, headstock; 101, wire hole; 102, slide groove; 103, threaded connection hole; 110, main camera module; 120, lighting module; 130, water / air nozzle assembly; 140, instrument passage; 150, lifting clamp mounting groove; 151, inclined surface; 160, isolation chamber; 170, partition wall; 171, shaft hole; 180, sealing cover; 181, mounting hole; 182, glue application groove; 190, wire slider; 191, wire through hole; 192, rounded corner; 193, lug; 200, ultrasonic probe; 210, ultrasonic probe holder; 220, ultrasonic transducer; 230, secondary camera and lighting module; 300, lifting clamp fixing seat; 310, main body; 311, first connection hole; 312 313. Second connecting hole; 320. Adhesive groove; 400. Cylinder body; 410. Lifting clamp connecting shaft; 411. Steel wire connecting part; 412. Steel wire connecting hole; 420. Axial through hole; 430. First sealing groove; 440. Second sealing groove; 450. Retaining ring; 460. Polygonal boss; 470. Foolproof identification boss; 500. Lifting clamp rocker arm; 510. Rocker arm connecting hole; 520. Polygonal groove; 530. Foolproof identification groove; 600. Drive steel wire; 700. Mounting pin; 710. Threaded section; 720. Smooth section; 810. First sealing ring; 820. Second sealing ring; 910. First screw; 920. Second screw; A1. First sealant; A2. Second sealant. Detailed Implementation

[0040] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0041] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0042] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. The term "far end" refers to the end furthest from the operator, and the term "proximal end" refers to the end closest to the operator. Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0043] In existing technology, the forceps lifting mechanism of an ultrasonic endoscope mainly consists of a drive wire, a forceps lifting crank, a forceps lifting pin, and a forceps lifting arm. The forceps lifting mechanism is mounted on the headstock of the ultrasonic endoscope, which includes a mounting groove and a mounting cavity separated by a partition. The forceps lifting arm is positioned within the mounting groove, the forceps lifting crank within the mounting cavity, and the forceps lifting pin passes through the partition of the headstock, with one end connected to the forceps lifting arm and the other end connected to the forceps lifting crank. The distal end of the drive wire is connected to the forceps lifting crank, and the proximal end is connected to the operating handle of the ultrasonic endoscope. By operating a lever on the operating handle, the drive wire moves back and forth, causing the forceps lifting arm to swing up and down within the mounting groove via the forceps lifting crank and the forceps lifting pin. This adjusts the angle of the biopsy needle tip on the forceps lifting arm, ensuring the biopsy needle reaches the optimal puncture position.

[0044] However, in existing clamp lifting mechanisms, the mounting cavity of the head end seat cannot form an independent closed cavity. Contaminants can easily enter the mounting cavity and contaminate the drive steel wire and other structures within the mounting cavity. These contaminants that enter the gaps between the multiple steel wires or the dead corners of other structures within the mounting cavity are extremely difficult to clean and effectively disinfect and sterilize, which can easily cause cross-contamination during subsequent use.

[0045] To address the aforementioned issues, this application provides an endoscope insertion tip that can be used in both ultrasonic electronic upper gastrointestinal endoscopes and electronic duodenoscopes. The specific structure of the endoscope insertion tip is described below using the application of this endoscope insertion tip in an ultrasonic electronic upper gastrointestinal endoscope as an example.

[0046] like Figure 1 and Figure 2The endoscope insertion tip shown includes a tip base 100, an ultrasonic probe 200, and a lifting clamp mechanism. The ultrasonic probe 200 is connected to the distal end of the tip base 100, and the lifting clamp mechanism is mounted on the tip base 100. The tip base 100 is equipped with a main camera module 110, an illumination module 120, and a water-air nozzle assembly 130. The distal end face of the tip base 100 facing the ultrasonic probe 200 includes an inclined surface, which forms an angle with the axial direction of the tip base 100. The imaging window of the main camera module 110, the illumination window of the illumination module 120, and the cleaning fluid outlet of the water-air nozzle assembly 130 are all located on the inclined surface. The cleaning fluid flowing out of the cleaning fluid outlet can clean the imaging window of the main camera module 110 to reduce fogging on the imaging window and improve the clarity of the images captured by the main camera module 110.

[0047] like Figure 1 and Figure 2 As shown, the ultrasound probe 200 includes an ultrasound probe holder 210, an ultrasound transducer 220, and a secondary camera and illumination module 230. The ultrasound probe holder 210 is connected to the distal end of the headpiece 100, and the ultrasound transducer 220 and the secondary camera and illumination module 230 are both connected to the ultrasound probe holder 210. The ultrasound transducer 220 is used to transmit ultrasound signals and receive echo signals. The ultrasound transducer 220 transmits the received echo signals to the ultrasound host connected to the ultrasound endoscope. The ultrasound host can process the echo signals to obtain ultrasound images of the corresponding areas for subsequent observation, imaging, and diagnostic operations. The secondary camera and illumination module 230 is located on one side of the ultrasound transducer 220, and its imaging and illumination window is located at the distal end of the ultrasound probe holder 210. The imaging and illumination direction of the secondary camera and illumination module 230 is parallel to the axial direction of the headpiece 100. The secondary camera and illumination module 230 can obtain a field of view and illumination in the axial front direction of the headstock 100, reducing the difficulty of inserting the headstock into the human digestive tract and improving the operability of the ultrasound endoscope; at the same time, in conjunction with the main camera module 110 and illumination module 120 with lateral imaging illumination on the headstock 100, a larger field of view can be formed, reducing the blind spots in the field of view when the ultrasound endoscope is imaging in the digestive tract or other natural orifices.

[0048] like Figure 1 and Figure 2 As shown, the end of the headpiece 100 facing the ultrasound probe 200 is provided with a clamp mounting groove 150. The opening of the clamp mounting groove 150 communicates with the external space of the inserted headpiece. The interior of the headpiece 100 is provided with an instrument channel 140 communicating with the clamp mounting groove 150. Figure 2 , Figure 3 and Figure 4As shown, the head end seat 100 is also provided with an isolation cavity 160 located on one side of the lifting clamp mounting groove 150. The lifting clamp mounting groove 150 and the isolation cavity 160 are separated by a partition wall 170. The partition wall 170 is provided with a shaft hole 171 that connects the lifting clamp mounting groove 150 and the isolation cavity 160. The open part of the isolation cavity 160 is sealed with a sealing cover 180. The sealing cover 180 and the head end seat 100 cooperate to form an independent closed cavity inside the isolation cavity 160.

[0049] like Figure 2 and Figure 3 As shown, the clamp lifting mechanism includes a clamp fixing seat 300, a clamp connecting shaft 400, a clamp lifting arm 500, a drive steel wire 600, and a mounting pin 700. The clamp connecting shaft 400, drive steel wire 600, and mounting pin 700 are combined to form a clamp lifting drive assembly. The clamp fixing seat 300 is disposed within an isolation cavity 160. One end of the clamp connecting shaft 400 extends into the isolation cavity 160, and the other end extends into the clamp lifting mounting groove 150. The clamp lifting arm 500 is connected to the end of the clamp connecting shaft 400 located in the clamp lifting mounting groove 150, and the clamp lifting arm 500 and the clamp connecting shaft 400 are relatively circumferentially fixed. Figure 4 As shown, the distal end of the drive wire 600 passes through the wire hole 101 on the head end seat 100 and extends into the isolation cavity 160. The distal end of the drive wire 600 is fixedly connected to one end of the lifting clamp connecting shaft 400 located within the isolation cavity 160, and the proximal end of the drive wire 600 is connected to the operating handle. The drive wire 600 drives the lifting clamp rocker arm 500 to rotate axially around the lifting clamp connecting shaft 400 via the lifting clamp connecting shaft 400. Figure 8 and Figure 10 As shown, the lifting forceps connecting shaft 400 has an axially through hole 420 inside. The lifting forceps rocker arm 500 has a rocker arm connecting hole 510 on the side facing the lifting forceps connecting shaft 400, corresponding to the position of the axial through hole 420. The mounting pin 700 passes through the axial through hole 420 in the lifting forceps connecting shaft 400 and is threaded into the rocker arm connecting hole 510 in the lifting forceps rocker arm 500. The diagnostic instrument (not shown) extends into the lifting forceps rocker arm 500 through the distal opening of the instrument channel 140. The up-and-down swing of the lifting forceps rocker arm 500 during rotation drives the distal end of the diagnostic instrument to rotate and lift to a specific angle to achieve the optimal working position; the diagnostic instrument can be a biopsy puncture needle. In this type of clamping mechanism, the isolation chamber 160 of the head end seat 100 can form an independent closed cavity. The distal end of the drive wire 600 is hidden inside the isolation chamber 160. The drive wire 600 is not easily contaminated during use, and there is no need to disassemble the drive wire 600 for cleaning or design a special cleaning pipe for the drive wire 600. The structure is simpler.

[0050] like Figure 2 and Figure 5As shown, in some embodiments, the bottom surface of the lifting clamp mounting groove 150 is a slope 151, and the bottom of the lifting clamp mounting groove 150 has no obvious dead corners, which makes it easy for the lifting clamp mounting groove 150 to be cleaned by a brush.

[0051] like Figure 2 - Figure 4 , Figure 6 and Figure 7 As shown, the clamp fixing base 300 includes a main body 310 and a cylindrical body 320, both of which are integral structures. The main body 310 is L-shaped and located inside the isolation cavity 160. The bottom wall of the main body 310 has a first connecting hole 311, and the bottom wall of the isolation cavity 160 has a threaded connecting hole 103 corresponding to the position of the first connecting hole 311. The bottom wall of the main body 310 is fixed to the bottom wall of the isolation cavity 160 by a first screw 910 passing through the first connecting hole 311 and the threaded connecting hole 103. The cylindrical body 320 is integrally formed on the side wall of the main body 310, and a portion of the cylindrical body 320 extends into the shaft hole 171 of the partition wall 170. The outer wall of the cylindrical body 320 and the hole wall of the shaft hole 171 are clearance-fitted, and the clearance is sealed with a first sealant A1. The first sealant A1 is applied between the outer wall of the cylindrical body 320 and the hole wall of the shaft hole 171. The main body 310 and the partition wall 170 are clearance-fitted, and the clearance is sealed with a second sealant A2. The second sealant A2 is applied between the main body 310 and the partition wall 170. When the first sealant A1 between the cylinder part 320 and the shaft hole 171 fails, the second sealant A2 between the main body 310 and the partition wall 170 can form a secondary seal, improving the sealing effect between the lifting clamp fixing seat 300 and the partition wall 170. Since the lifting clamp fixing seat 300 is a separately molded part assembled onto the head end seat 100, the structural complexity of the lifting clamp fixing seat 300 is much lower than that of the head end seat 100. The dimensions of the cylinder part 320 on the lifting clamp fixing seat 300 are easier to control with higher precision compared to the dimensions of the inner shaft hole 171 of the partition wall 170, and a more reliable seal can be achieved between the outer wall of the lifting clamp connecting shaft 400 and the inner wall of the cylinder part 320. Compared with the existing technology that directly seals the outer wall of the clamp connecting shaft 400 and the inner wall of the shaft hole 171 with a sealing ring, this method can avoid the problem of unreliable local sealing when the shaft hole 171 is not a regular circle due to machining errors.

[0052] like Figure 3 and Figure 7As shown, in some embodiments, the main body 310 has an adhesive application groove 313 on the side facing the partition wall 170. The adhesive application groove 313 is located on the outer periphery of the cylindrical body 320, and the second sealant A2 is disposed within the adhesive application groove 313. The adhesive application groove 313 can hold a large amount of adhesive, and the second sealant A2 is less prone to sealing failure. In alternative embodiments, the adhesive application groove 313 can also be disposed on the partition wall 170, or both the main body 310 and the partition wall 170 may have adhesive application grooves 313. The shape of the adhesive application groove 313 is not limited to annular or arc-shaped, but can be formed in various other ways, as long as the adhesive application groove 313 can hold more adhesive to improve sealing reliability.

[0053] like Figure 2 , Figure 3 , Figure 8 and Figure 9 As shown, in some embodiments, the lifting clamp connecting shaft 400 located within the isolation cavity 160 has a protruding wire connecting portion 410 at one end. The wire connecting portion 410 can be a part of the lifting clamp connecting shaft 400 or a component fixedly installed on the outer periphery of the lifting clamp connecting shaft 400. The outer periphery of the wire connecting portion 410 has a wire connecting hole 411. The distal end of the driving wire 600 is fixedly connected to the wire connecting hole 411 by adhesive bonding or welding. The wire connecting portion 410 has a wire avoidance notch 412 to avoid contact with the driving wire 600 when under force, preventing motion interference and frictional damage to the driving wire 600.

[0054] like Figure 3 , Figure 8 and Figure 9 As shown, the outer wall of the lifting clamp connecting shaft 400 and the inner hole of the cylindrical body 320 are sealed together. Specifically, the outer wall of the lifting clamp connecting shaft 400 is provided with a radially outward protruding retaining ring 450. The retaining ring 450 and the wire connecting part 410 are combined around the outer periphery of the lifting clamp connecting shaft 400 to form a first sealing groove 430. A first sealing ring 810 is fitted inside the first sealing groove 430, and the outer wall of the first sealing ring 810 abuts against the inner wall of the cylindrical body 320. After the first sealing ring 810 is interference-compressed, it can achieve effective sealing, preventing contaminants in the lifting clamp mounting groove 150 from entering the isolation cavity 160 through the gap between the inner hole of the cylindrical body 320 and the outer wall of the lifting clamp connecting shaft 400.

[0055] like Figure 3 , Figure 8 and Figure 9As shown, the inner wall of the lifting clamp connecting shaft 400 and the outer wall of the mounting pin 700 are sealed together. Specifically, the lifting clamp connecting shaft 400 has a second sealing groove 440 inside, and a second sealing ring 820 is sleeved on the outer circumference of the mounting pin 700 within the second sealing groove 440. The outer wall of the second sealing ring 820 abuts against the inner wall of the lifting clamp connecting shaft 400. After being pressurized, the second sealing ring 820 can achieve effective sealing, preventing contaminants in the lifting clamp mounting groove 150 from entering the isolation cavity 160 through the gap between the outer wall of the mounting pin 700 and the inner wall of the lifting clamp connecting shaft 400.

[0056] like Figure 2 , Figure 6 , Figure 7 and Figure 12 As shown, in some embodiments, the side wall of the lifting clamp fixing base 300 is provided with a second connecting hole 312, and the sealing cover 180 is provided with a mounting hole 181 corresponding to the position of the second connecting hole 312. The sealing cover 180 is fixed to the side wall of the lifting clamp fixing base 300 by a second screw 920 passing through the mounting hole 181 and the second connecting hole 312. The gap between the mating part of the sealing cover 180 and the head end seat 100 is sealed with a third sealant; the side wall of the mating part of the sealing cover 180 and the head end seat 100 is provided with a glue-applying groove 182, which is sloped, and the third sealant sealant fills the space between the glue-applying groove 182 and the head end seat 100. Because the mating depth between the sealing cap 180 and the opening of the corresponding isolation cavity 160 of the head end seat 100 is relatively deep, directly filling the gap between the sealing cap 180 and the head end seat 100 with glue is inefficient and may result in excessive glue overflow onto the lifting clamp fixing seat 300, the lifting clamp connecting shaft 400, and the drive steel wire 600, causing problems such as movement jamming of the lifting clamp rocker arm 500. Therefore, a sloping glue-applying groove 182 is designed on the sealing cap 180. In areas with a deeper mating depth, simply filling the glue-applying groove 182 with glue is sufficient to achieve a seal, reducing the amount of glue applied, improving work efficiency, and preventing glue overflow that could cause movement jamming. In an alternative embodiment, the sealing cap 180 and the head end seat 100 can be sealed together using a sealing ring located on the outer periphery of the sealing cap 180.

[0057] like Figure 3 , Figure 9 and Figure 10As shown, in some embodiments, the lifting clamp arm 500 has a shaped groove on the side facing the partition wall 170, and one end of the lifting clamp connecting shaft 400 has a shaped boss that extends into the shaped groove and matches the shape of the groove. Unlike the prior art that uses a cylindrical pin and the cylindrical mating surface between the lifting clamp arm 500 to transmit torque, due to the size and space limitations of the head end seat 100, the diameter of the existing cylindrical pin is generally less than 1 mm. This application employs a combination of irregularly shaped grooves and irregularly shaped bosses. The side length of the irregularly shaped grooves and bosses can be designed to be 2mm, and the depth of the irregularly shaped grooves and bosses can be designed to be 1mm. The surface area of ​​the mating surface between the irregularly shaped grooves and bosses is much larger than the surface area of ​​the outer cylindrical mating surface of the cylindrical pin. When transmitting the same torque, the stress on the mating surface between the irregularly shaped grooves and bosses is smaller. Especially when it is necessary to stand up biopsy needles or other diagnostic instruments, the lifting forceps rocker arm 500 needs to withstand a large torque. Under high load conditions, increasing the stress-bearing surface of the parts can effectively reduce the contact stress between the lifting forceps connecting shaft 400 and the lifting forceps rocker arm 500, and improve the fatigue strength and service life of the lifting forceps connecting shaft 400 and the lifting forceps rocker arm 500.

[0058] like Figure 3 , Figure 9 and Figure 10 As shown, in some embodiments, the irregular groove is a polygonal groove 520, and one side of the polygonal groove 520 is provided with a foolproof identification groove 530. The irregular boss is a polygonal boss 460, and one side of the polygonal boss 460 is provided with a foolproof identification boss 470 corresponding to the position of the foolproof identification groove 530. The foolproof identification groove 530 and the foolproof identification boss 470 cooperate to ensure the uniqueness of the installation direction of the polygonal groove 520 and the polygonal boss 460, avoid incorrect installation direction, and improve assembly efficiency. Specifically, the polygonal groove 520 can be a square groove, and the irregularly shaped boss can be a polygonal boss 460 or a square boss. Since the lifting forceps rocker arm 500 and the lifting forceps connecting shaft 400 cooperate through the square groove and the square boss, the lifting forceps connecting shaft 400 transmits torque to the lifting forceps rocker arm 500 through the four force-bearing surfaces of the square groove. The lifting forceps rocker arm 500 and the lifting forceps connecting shaft 400 will move synchronously, thereby bending some diagnostic instruments or biopsy puncture needles into a certain angle to facilitate the next treatment or examination operation.

[0059] like Figure 3 and Figure 11 As shown, the mounting pin 700 includes a threaded section 710 and a smooth shaft section 720. The threaded section 710 of the mounting pin 700 is used to be threadedly fixedly connected to the axial through hole 420 of the lifting clamp connecting shaft 400 and the rocker arm connecting hole 510 of the lifting clamp rocker arm 500. The smooth shaft section 720 of the mounting pin 700 is used to fit the second sealing ring 820.

[0060] The main installation steps for this lifting clamp mechanism on the headstock are as follows:

[0061] Step S1: Install the lifting clamp rocker arm 500 into the lifting clamp mounting slot 150;

[0062] Step S2: Apply adhesive to the outer wall of the cylindrical part 320 of the lifting clamp fixing seat 300 and the adhesive groove 313 of the main body part 310. Insert the cylindrical part 320 of the lifting clamp fixing seat 300 into the shaft hole 171 of the partition wall 170, and fix the lifting clamp fixing seat 300 in the isolation cavity 160 using two first screws 910. The outer wall of the cylindrical part 320 and the hole wall of the shaft hole 171 form a primary adhesive seal, and the main body part 310 and the partition wall 170 form a secondary adhesive seal.

[0063] Step S3: The drive wire 600 is fixedly connected to the lifting clamp connecting shaft 400 by adhesive or welding. The first sealing ring 810 is sleeved in the first sealing groove 430 of the lifting clamp connecting shaft 400. The drive wire 600, the lifting clamp connecting shaft 400 and the first sealing ring 810 form a lifting clamp drive assembly. After passing one end of the lifting clamp connecting shaft 400 of the lifting clamp drive assembly through the partition 170, it is aligned with the polygonal groove 520 and the foolproof identification groove 530 of the lifting clamp rocker arm 500. The lifting clamp connecting shaft 400 is pushed into place. The first sealing ring 810 forms a sealing ring between the lifting clamp connecting shaft 400 and the cylinder part 320.

[0064] Step S4: After the second sealing ring 820 is fitted on the optical shaft section 720 of the mounting pin 700, it passes through the axial through hole 420 of the lifting clamp connecting shaft 400. The threaded section 710 of the mounting pin 700 is threadedly connected to the axial through hole 420 of the lifting clamp connecting shaft 400 and the rocker arm connecting hole 510 in the lifting clamp rocker arm 500. The second sealing ring 820 forms a sealing ring between the lifting clamp connecting shaft 400 and the mounting pin 700. The mounting pin 700 fixes the lifting clamp rocker arm 500 and the lifting clamp connecting shaft 400 together.

[0065] Step S5: Use two second screws 920 to fix the sealing cover 180 to the lifting clamp fixing seat 300, and apply glue to seal the mating gap between the sealing cover 180 and the head end seat 100.

[0066] This installation method and sealing design of the clamp lifting mechanism can hide the distal end of the drive wire 600 and the clamp lifting drive assembly inside the isolation chamber 160, effectively isolating the drive wire 600 and the clamp lifting drive assembly from contaminants in the clamp mounting slot 150. The isolation chamber 160 is then sealed by the sealing cap 180, preventing external contaminants from entering. Since the drive wire 600 and the clamp lifting drive assembly are both within a closed isolation chamber 160, cleaning only requires cleaning the clamp lifting arm 500 and the clamp mounting slot 150; the drive wire 600 does not need to be cleaned and disinfected, reducing the difficulty of cleaning and disinfection.

[0067] like Figure 2 , Figure 4 and Figure 13 As shown, in some embodiments, the head end seat 100 on the side wall of the isolation cavity 160 is provided with a wire hole 101, through which the distal end of the driving wire 600 extends into the isolation cavity 160. A wire slider 190 is fixedly connected to the side of the isolation cavity 160 near the wire hole 101. The wire slider 190 has lugs 193 on both sides. The head end seat 100 on the side of the isolation cavity 160 near the wire hole 101 is also provided with a groove 102. The wire slider 190 is mounted on the groove 102 of the head end seat 100 through the lugs 193, and the gap between the wire slider 190 and the groove 102 is sealed with glue. The wire slider 190 has a wire through hole 192 for the drive wire 600 to pass through. The inner wall of the wire through hole 192 is polished, and a rounded corner 193 is machined at the end of the wire through hole 192. This reduces the contact friction resistance between the drive wire 600 and the wire slider 190, and improves the service life of the drive wire 600. Since the drive wire 600 needs to reciprocate, the contact friction resistance between the drive wire 600 and the wire hole 101 will be relatively large. After repeated reciprocating friction, the wire hole 101 may be worn through, or even lead to failure of airtightness. To avoid this problem, the wire slider 190 is specially designed. The wire slider 190 is installed on the slide groove 102 of the head end seat 100, and the wire slider 190 is made of a wear-resistant metal (such as SUS304).

[0068] This invention also provides an ultrasonic endoscope, which includes an insertion tip of the endoscope as described above. The insertion tip includes a tip base 100 and an ultrasonic probe 200 connected to the distal end of the tip base 100.

[0069] In summary, the endoscope insertion head and ultrasound endoscope provided in this embodiment of the present invention can drive the steel wire 600 to pull the lifting forceps connecting shaft 400 to rotate, and the lifting forceps connecting shaft 400 can drive the lifting forceps rocker arm 500 to swing up and down, thereby adjusting the angle of the front end of the diagnostic and therapeutic instrument on the lifting forceps rocker arm 500. By providing a cylindrical portion 320 on the clamp fixing seat 300 that can extend into the shaft hole 171 of the partition wall 170, the gap between the cylindrical portion 320 and the shaft hole 171 is sealed with adhesive, and the gap between the main body portion 310 of the clamp fixing seat 300 and the partition wall 170 is sealed with adhesive. Furthermore, the clamp connecting shaft 400 is sealed to the inner hole of the cylindrical portion 320 by a first sealing ring 810. Compared to the prior art method where the outer wall of the clamp connecting shaft 400 and the inner wall of the shaft hole 171 are directly sealed with a sealing ring, this clamp mechanism's sealing design allows for a secondary seal between the main body portion 310 and the partition wall 170 when the adhesive between the cylindrical portion 320 and the shaft hole 171 fails to seal, ensuring the clamp's effectiveness. The gap between the fixed seat 300 and the partition 170 can achieve a reliable seal, making it difficult for contaminants in the lifting clamp mounting groove 150 to enter the isolation chamber 160 through the gap. Moreover, the sealing cover 180 seals the open part of the isolation chamber 160. The drive wire 600 and the lifting clamp drive assembly are both located in a completely closed isolation chamber 160. When cleaning the head end seat 100 and the lifting clamp mechanism, it is only necessary to clean the lifting clamp rocker arm 500 and the lifting clamp mounting groove 150. It is not necessary to clean and disinfect the drive wire 600 and other parts in the isolation chamber, which reduces the difficulty of cleaning and disinfection operations. It is also not necessary to design an independent cleaning channel for the drive wire 600, which reduces material costs and reduces the difficulty of assembling the whole machine. Furthermore, since the lifting clamp fixing seat 300 is a separately molded part that is then assembled onto the head end seat 100, the structural complexity of the lifting clamp fixing seat 300 is much lower than that of the head end seat 100. The dimensions of the cylindrical part 320 on the lifting clamp fixing seat 300 are easier to control with higher precision compared to the dimensions of the inner shaft hole 171 of the partition wall 170. A more reliable seal can be achieved between the outer wall of the lifting clamp connecting shaft 400 and the inner wall of the cylindrical part 320.

[0070] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. An insertion tip for an endoscope, characterized in that, include: The head end seat (100) is provided with a lifting clamp mounting groove (150) and an isolation cavity (160) separated by a partition wall (170), and the partition wall (170) is provided with a shaft hole (171) connecting the lifting clamp mounting groove (150) and the isolation cavity (160); The lifting clamp fixing base (300) includes a main body (310) fixedly disposed inside the isolation cavity (160) and a cylindrical body (320) located on one side of the main body (310) and extending into the shaft hole (171); a first sealing structure is provided between the cylindrical body (320) and the shaft hole (171), and a second sealing structure is provided between the main body (310) and the partition wall (170); The lifting clamp rocker arm (500) is located within the lifting clamp mounting slot (150); The clamp lifting device drive assembly includes a clamp lifting connecting shaft (400) and a drive wire (600); the clamp lifting connecting shaft (400) is sealed and connected to the inner hole of the cylinder part (320); the distal end of the drive wire (600) passes through the wire hole (101) on the head end seat (100) and is fixedly connected to one end of the clamp lifting connecting shaft (400) located in the isolation cavity (160); the other end of the clamp lifting connecting shaft (400) located in the clamp lifting mounting groove (150) is fixedly connected to the clamp lifting device rocker arm (500); the drive wire (600) is used to drive the clamp lifting device rocker arm (500) to rotate through the clamp lifting connecting shaft (400); A sealing cap (180) is used to seal the open portion of the isolation chamber (160).

2. The insertion tip of the endoscope according to claim 1, characterized in that, The lifting clamp connecting shaft (400) has an axial through hole (420) inside, and the lifting clamp rocker arm (500) has a rocker arm connecting hole (510) on the side facing the lifting clamp connecting shaft (400) that corresponds to the position of the axial through hole (420); the lifting clamp connecting shaft (400) and the lifting clamp rocker arm (500) are fixedly connected by mounting pins (700) passing through the axial through hole (420) and the rocker arm connecting hole (510).

3. The insertion tip of the endoscope according to claim 1, characterized in that, The first sealing structure is a first sealant disposed between the outer wall of the cylindrical part (320) and the wall of the shaft hole (171).

4. The insertion tip of the endoscope according to claim 1, characterized in that, The main body (310) has an adhesive application groove (313) on the side facing the partition wall (170). The adhesive application groove (313) is located on the outer periphery of the cylindrical body (320). The second sealing structure is a second sealant that is sealed between the adhesive application groove (313) and the partition wall (170).

5. The insertion tip of the endoscope according to claim 1, characterized in that, The outer periphery of the lifting clamp connecting shaft (400) is provided with a first sealing groove (430), and a first sealing ring (810) is sleeved inside the first sealing groove (430). The outer wall of the first sealing ring (810) abuts against the inner wall of the cylindrical part (320).

6. The insertion tip of the endoscope according to any one of claims 1-5, characterized in that, The gap between the mating portion of the sealing cap (180) and the head end seat (100) is sealed by a third sealant.

7. The insertion tip of the endoscope according to claim 6, characterized in that, The side wall of the mating part of the sealing cap (180) and the head end seat (100) is provided with an adhesive application groove (182), and the third sealant is sealed and filled between the adhesive application groove (182) and the head end seat (100).

8. The insertion tip of the endoscope according to any one of claims 1-5, characterized in that, The lifting clamp rocker arm (500) has a shaped groove on the side facing the partition wall (170), and the other end of the lifting clamp connecting shaft (400) has a shaped boss that extends into the shaped groove and matches the shape of the shaped groove.

9. The insertion tip of the endoscope according to claim 1, characterized in that, A wire slider (190) is fixedly connected to the side of the isolation cavity (160) near the wire hole. The wire slider (190) is provided with a wire through hole (191) through which the driving wire (600) can pass. The end of the wire through hole (191) is provided with a rounded corner (192).

10. An ultrasonic endoscope, characterized in that, The ultrasound endoscope includes an insertion tip of the endoscope as described in any one of claims 1-9, and the insertion tip further includes an ultrasound probe (200) connected to the distal end of the tip seat (100).

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