An auxiliary liquid feeding device for endoscopic ultrasonography

Abstract

The application relates to the technical field of endoscopes, in particular to an auxiliary liquid feeding device during an ultrasonic endoscope examination, which solves the problem that a liquid feeding channel and a suction channel are easily blocked, and comprises a mirror body, a lens group and a mirror tube, the mirror tube is connected with the lens group through a connecting piece, the other end of the mirror tube is detachably fixedly connected with the lens group, a suction channel and a nozzle are communicated among the lens group, the mirror tube and the mirror body, a communication groove is arranged in the lens group, the communication groove communicates the end of the suction channel and the nozzle, a first latex film and a second latex film are respectively arranged in the two ends of the communication groove, a first air duct and a second air duct are arranged on the lower side of the communication groove, the ports of the first air duct and the second air duct are located between the first latex film and the second latex film, and the first air duct and the second air duct are communicated with plastic tubes after extending out of the mirror tube and the mirror body; under the premise of guaranteeing normal liquid feeding and suction functions, the application can significantly reduce the blocking risk of the nozzle and the suction channel and reduce the probability of interrupting operation in the operation due to the blocking.

Description

Technical Field

[0001] This invention relates to the field of endoscopy technology, and more specifically to an auxiliary fluid delivery device for endoscopic ultrasound examination. Background Technology

[0002] A medical endoscope is a medical device that integrates optics, electronics, and precision mechanics. It is mainly used to examine internal organs of the human body, such as the gastrointestinal tract. It includes structures such as tubing, lens assembly, light source, camera, fluid delivery channel, and suction channel. The tubing is inserted into the body from the mouth, anus, surgical incision, etc., to help doctors observe lesions. The lens assembly is equipped with a light source and a camera. The light source provides illumination to improve the clarity of the field of vision, and the camera is used to capture images inside the body. The lens assembly and the tubing are connected by a liquid delivery channel and a suction channel. The liquid delivery channel can deliver liquids such as water into the body to flush away debris in front of the camera, and the suction channel is used to remove debris flushed by the liquid. To improve the accuracy of examinations, some endoscopes also have a high-frequency ultrasound probe installed at the tip of a regular endoscope. This not only allows direct visualization of the mucosa on the outermost surface of the digestive tract, but also enables simultaneous ultrasound scanning to see the various layers of the digestive tract wall and the condition of surrounding organs.

[0003] However, according to feedback, existing endoscopes have a defect: when mucus, blood clots, food residue and other debris accumulate near the fluid delivery channel and aspiration channel, the fluid delivery channel and aspiration channel are easily blocked. The reason for the blockage of the liquid delivery channel is that when the liquid delivery channel stops supplying water, the pressure inside the liquid delivery channel decreases, and impurities are more likely to flow back and enter the liquid delivery channel. These impurities will solidify inside the liquid delivery channel, thus blocking the liquid delivery channel. The reason for the blockage of the suction channel is that although the diameter of the suction channel is larger than that of the liquid delivery channel, when the impurities are suctioned under negative pressure, the mucus carries the solid impurities and clumps together, forming a clump that blocks the suction channel. Therefore, the present invention provides an auxiliary fluid delivery device for endoscopic ultrasound examination to solve the above-mentioned problems. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, the present invention provides an auxiliary fluid delivery device for ultrasound endoscopy to solve the problem that the fluid delivery channel and aspiration channel are easily blocked.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: An auxiliary fluid delivery device for endoscopic ultrasound examination includes a scope body and a lens assembly. The scope body is connected to a scope tube, and the other end of the scope tube is detachably and fixedly connected to the lens assembly via a connector. A suction channel and a nozzle are connected between the lens assembly, the scope tube, and the scope body. A connecting groove is provided inside the lens assembly, which connects the suction channel and the end of the nozzle. A first latex film and a second latex film are respectively installed in the two ends of the connecting groove. The lower side of the connecting groove is provided with a first air passage and a second air passage. The ports of the first air passage and the second air passage are located between the first latex film and the second latex film. The first air passage and the second air passage extend out of the endoscope tube and the endoscope body and are connected to a plastic tube. The plastic tube is connected to the air pressure control component. A positive and negative pressure control structure is installed in the connecting groove. The positive and negative pressure control structure is installed at the port of the first air passage and the second air passage. The positive and negative pressure control structure controls the air pressure between the first latex membrane and the second latex membrane. Through the above technical solution, the external air pressure control component applies positive or negative pressure to the sealed space between the first latex membrane and the second latex membrane via the plastic tube, the first air channel and the second air channel. At the same time, the positive and negative pressure control structure adjusts the position of the transverse plate and the opening and closing state of the water holes on both sides of the water box according to the different air pressure combinations of the first air channel and the second air channel, thereby causing the air pressure in the sealed space to change according to a predetermined pattern, driving the first latex membrane to bulge or retract toward the nozzle, and driving the second latex membrane to bulge or retract toward the suction channel. This is achieved through alternating positive and negative pressure control: The second latex film can cycle between bulging and shrinking, thereby causing the inner diameter of the suction channel end to continuously increase and decrease. This intermittently squeezes and loosens the mucus, blood clots, food residues and other debris attached to the inner wall of the suction channel end, effectively preventing debris from accumulating and solidifying at the channel opening. The first latex film can bulge and seal the nozzle when needed, preventing liquid backflow or debris from entering the nozzle in reverse after the delivery process. This significantly reduces the risk of nozzle and suction channel blockage while ensuring normal delivery and suction functions, and reduces the probability of operation interruption due to blockage during the procedure.

[0006] Preferably, the lens assembly includes a lens and an end cap; One end of the lens is detachably and fixedly connected to the end of the lens tube via a connector, and the other end of the lens is covered with an end cap. Both the end cap and the lens are made of medical-grade polymer plastic, and the end cap covers the end of the lens. A connecting groove is provided at the end of the lens near the end cap, and the end cap covers and seals the connecting groove. Through the above technical solution, the end cap is forcibly pressed and covered on the end of the lens by the elastic deformation of the medical polymer plastic material. It is clamped onto the lens by the interference fit between the plastic parts. At the same time, the inner side of the end cap completely covers and seals the opening of the connecting groove, so that the connecting groove is isolated from the external environment and prevents external liquids or gases from entering the device through the connecting groove. The detachable snap-fit ​​sealing structure between the end cap and the lens ensures that the connecting groove remains sealed under normal operating conditions, maintaining the sealing environment required for air pressure control. When needed, the end cap can be forcibly opened to quickly open the connecting groove, facilitating cleaning, replacement, or maintenance of the first latex membrane, second latex membrane, and positive and negative pressure control structure inside the connecting groove. This improves the maintainability and reusability of the device.

[0007] Preferably, slots are provided at both ends of the connecting groove, and insert frames are movably inserted into both slots. The insert frames are located between the end cap and the lens, and the first latex film and the second latex film are fixedly connected to the two insert frames respectively. Through the above technical solution, the movable insertion and connection of the insertion frame and the slot allows the first latex film and the second latex film to be easily inserted into or removed from the connecting slot. This ensures the sealing and isolation effect of the first and second latex films on both ends of the connecting slot after installation, and also facilitates the individual replacement of the first and second latex films when they age or are damaged, without having to replace the entire lens, thus reducing the cost of use. Meanwhile, the end cap's limiting effect on the insert frame ensures that the insert frame will not loosen due to changes in air pressure or vibration during normal use.

[0008] Preferably, the positive and negative pressure control structure includes a water box, a transverse plate and a limiting strip. The limiting strip is arranged in a straight line along the lens axis in the communicating groove. The water box is inserted between the limiting strip and the insert frame along the lens axis, and the end cap seals the top of the water box. A transverse sliding plate moves through the connecting groove, and a limiting strip moves through the transverse sliding plate. Ventilation holes are provided on both the side of the water box closest to the first latex membrane and the side closest to the transverse plate. The lower end of the water box is provided with an insertion port, which can be inserted downwards into the second airway; The transverse plate is located at the port of the first air passage, and the opening width of the first air passage is greater than the thickness of the lower end of the transverse plate. Through the above technical solution, the limiting strip provides lateral guidance and constraint to the transverse plate, ensuring the directional stability and positional accuracy of the transverse plate when it moves under air pressure. The plug-in connection structure between the water box and the second air passage enables the air passage to be connected to the inside of the connecting groove. The vents on both sides of the water box ensure a balanced transmission of air pressure inside and outside the water box, so that the positive or negative pressure in the second air channel can effectively act on the space between the first latex film and the transverse plate. The design that the thickness of the lower end of the transverse plate is less than the width of the first air passage opening avoids the complete blockage of the first air passage port by the transverse plate, ensuring smooth air passage, thus providing a reliable structural basis for the subsequent deformation of the first and second latex films by air pressure. In summary, the bulging and depression of the first and second latex membranes are controlled by a combination of factors, including the lateral movement of the transverse plate, whether the vent holes of the water box are blocked, and the changes in air pressure within the first and second latex membranes.

[0009] Preferably, the distance between the limiting strip and the insert frame outside the first latex film is equal to the width of the water box; The above technical solution ensures that after the water box is inserted into the connecting groove along the lens axis, its two sides are precisely clamped and limited by the limiting strip and the insertion frame, preventing wobbling due to excessive gaps and difficulty in insertion due to excessive interference. At the same time, after the end cap is covered, the water box is sealed from the top, so that the water box is completely positioned in the horizontal, vertical and vertical directions within the connecting groove. This ensures that the water box does not shift or tilt during operation, improving the overall reliability of the device.

[0010] Preferably, the pneumatic control component includes a negative pressure machine, an air pump, a first three-way valve, and a second three-way valve. The output end of the negative pressure machine is connected to one end of the first three-way valve through a pipe, and the other two ends of the first three-way valve are respectively connected to two plastic pipes through pipes. The output end of the air pump is connected to one end of the second three-way valve through a pipe, and the other two ends of the second three-way valve are respectively connected to two plastic pipes through pipes. Through the above technical solution, by controlling the independent switching of the first and second three-way valves, the same set of negative pressure machine and air pump can provide positive or negative pressure to the first and second air passages separately and without interference. This achieves a flexible combination of four independent actions: negative pressure in the first air passage, positive pressure in the first air passage, negative pressure in the second air passage, and positive pressure in the second air passage. This provides a precise and controllable air pressure drive source for the subsequent alternating execution of the positive and negative pressure control structure to squeeze and remove debris from the end of the suction channel.

[0011] Preferably, the connector includes a rotating ring, a plug, a notch, and a limiting member; One end of the insertion rod is fixedly connected to the end of the lens assembly, and the other end of the insertion rod is provided with a recessed annular groove. The insertion rod is movably inserted into the lens tube. A rotating ring is rotatably fitted on the outside of the end of the lens tube. The upper edge of the rotating ring is radially inserted into the annular groove of the insertion rod. A notch is provided on the inner side of the rotating ring. After the rotating ring rotates, the notch is aligned with the insertion rod. A limiting component is installed between the rotating ring and the lens tube to temporarily fix the rotating ring. With the above technical solution, the upper edge of the rotating ring extends radially into the groove of the insert rod, thereby locking the insert rod so that it cannot be pulled out axially. When disassembly is required, the operator manually rotates the rotating ring so that the notch on the inner side of the rotating ring is rotated to the position aligned with the insert rod. At this time, the groove of the insert rod loses the obstruction of the upper edge at the notch, and the insert rod can be pulled out axially from the notch, realizing the separation of the lens assembly from the lens tube. By engaging the radial edge of the rotating ring with the groove of the insertion rod ring, the lens assembly and the lens tube can be quickly locked and unlocked axially. This ensures the reliability and stability of the connection during operation, and allows for easy and efficient disassembly by simply rotating the rotating ring when the lens assembly needs to be replaced or cleaned. Meanwhile, the temporary fixing effect of the limiting component on the rotating ring effectively avoids the risk of the notch accidentally aligning with the insertion rod due to external force during normal use, thus improving the safety of use.

[0012] Preferably, the limiting member includes a spring and a pin. A groove is provided on the lower side of the rotating ring. The upper end of the pin is semi-circular and can move up and down to insert into the groove. The lower end of the pin can move up and down to insert into the endoscope tube and is fixedly connected to the endoscope tube by a spring. The spring pushes the pin to insert the pin into the groove. Through the above technical solution, the elastic engagement of the spring and the semi-circular pin ensures that the rotating ring remains in a stable locked state when there is no external force, effectively preventing the rotating ring from rotating unexpectedly due to vibration or accidental contact, thereby ensuring reliable locking of the connector during operation. When the lens assembly needs to be disassembled, the operator only needs to apply sufficient rotational force to make the pin automatically disengage from the groove, without the need for additional unlocking operations, thus achieving the rotation and locking of the rotating ring.

[0013] The beneficial effects of this invention are as follows: In summary, this device allows the second latex membrane to cycle between bulging and retracting, thereby continuously increasing and decreasing the inner diameter of the suction channel end. This intermittently squeezes and loosens debris such as mucus, blood clots, and food residue adhering to the inner wall of the suction channel end, effectively preventing debris from accumulating and solidifying at the channel opening. Furthermore, after the liquid delivery stops, the first latex membrane can bulge to block the nozzle, preventing liquid backflow or debris from entering the nozzle in reverse after the liquid delivery process. This significantly reduces the risk of nozzle and suction channel blockage while ensuring normal fluid delivery and suction functions, thus reducing the probability of interrupting the operation due to blockage. Attached Figure Description

[0014] Figure 1 This is a perspective view of the present invention.

[0015] Figure 2 This is a three-dimensional view of the lens assembly in this invention after partial cross-section.

[0016] Figure 3 for Figure 2 A magnified view of part A.

[0017] Figure 4 for Figure 2 A magnified view of part B.

[0018] Figure 5 for Figure 2 A magnified view of part C.

[0019] Figure 6 This is a partial cross-sectional perspective view of the lens assembly after the first latex film and water tank have been removed in this invention.

[0020] Figure 7 for Figure 6 A magnified schematic diagram of part D.

[0021] Figure 8 This is a diagram of the airflow supply pipeline in this invention.

[0022] In the diagram: 1. Plastic tube; 2. Lens body; 3. Lens tube; 4. Rotating ring; 5. Lens assembly; 51. Lens; 52. End cap; 6. Suction channel; 7. Light guide; 8. Objective lens; 9. Nozzle; 10. Hook hole; 11. First latex film; 12. Vent hole; 13. Water box; 14. Horizontal sliding plate; 15. Second latex film; 16. Insert frame; 17. Slot; 18. First air passage; 19. Second air passage; 20. Insertion port; 21. Insert rod; 22. Notch; 23. Friction-increasing groove; 24. Spring; 25. Pin; 26. Groove; 27. Connecting groove; 28. Limiting strip; 29. ​​Negative pressure unit; 30. Air pump; 31. First three-way valve; 32. Second three-way valve. Detailed Implementation

[0023] The following will refer to the attached reference. Figures 1 to 8 The various embodiments of the present invention will be described in detail below. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0024] As attached Figure 1 -Appendix Figure 8 As shown, an auxiliary fluid delivery device for endoscopic ultrasound examination includes a scope body 2 and a lens assembly 5. Lens body 2: Lens body 2 is connected to lens tube 3. The other end of lens tube 3 is detachably and fixedly connected to lens group 5 via connector. Light guide 7 and objective lens 8 are fixedly installed inside lens group 5. Light guide 7 and objective lens 8 are electrically connected to an external control center. A suction channel 6 and nozzle 9 are connected between lens group 5, lens tube 3 and lens body 2. The above structure is the prior art. Lens Group 5: See Appendix Figure 2 and attached Figure 3 The lens group 5 includes a lens 51 and an end cap 52; Lens 51: One end of lens 51 is detachably and fixedly connected to the end of lens tube 3 via a connector. Light guide 7 and objective lens 8 are fixedly installed inside lens 51. The other end of lens 51 is covered with end cap 52. End cap 52: Both end cap 52 and lens 51 are made of medical-grade polymer plastic, which allows end cap 52 to be forcibly pressed onto the end of lens 51 to lock onto lens 51. A hook hole 10 is provided inside end cap 52 for forcibly pulling end cap 52 out using external auxiliary instruments such as straight hooks.

[0025] See appendix Figure 2 -Appendix Figure 4 Appendix Figure 6 and attached Figure 7 A connecting groove 27 is provided at one end of the lens 51 near the end cap 52. The connecting groove 27 connects the suction channel 6 and the nozzle 9. The end cap 52 covers and seals the connecting groove 27. Connecting slot 27: See appendix Figure 2 -Appendix Figure 4 Appendix Figure 6 and attached Figure 7 Slots 17 are provided along the axial direction of the lens 51 at both ends of the connecting groove 27 near the suction channel 6 and the nozzle 9. Insertion frames 16 are movably inserted into both slots 17. After the end cap 52 is sealed onto the lens 51, the end cap 52 closes the insertion frame 16, so that the insertion frame 16 cannot be pulled out of the slot 17 at will. Only after the end cap 52 is forcibly pulled out using external auxiliary tools such as straight hooks can the insertion frame 16 be pulled out. Insert 16: See Appendix Figure 2 -Appendix Figure 4 Appendix Figure 6 and attached Figure 7 The first latex film 11 and the second latex film 15 are fixedly connected in the two insert frames 16 respectively. The first latex film 11 and the second latex film 15 block the two ends of the connecting groove 27, and the suction channel 6, the connecting groove 27 and the nozzle 9 are separated by the first latex film 11 and the second latex film 15. See appendix Figure 1 and attached Figure 4 A first air passage 18 and a second air passage 19 are provided on the lower side of the connecting groove 27. The first air passage 18 and the second air passage 19 are located between the first latex film 11 and the second latex film 15. The first air passage 18 and the second air passage 19 extend out of the lens tube 3 and the lens body 2 and are connected to a plastic tube 1. The plastic tube 1 is connected to the air pressure control component. The air pressure control component controls the air pressure between the first latex film 11 and the second latex film 15 through the plastic tube 1, the first air passage 18 and the second air passage 19.

[0026] See appendix Figure 8The pneumatic control component includes a negative pressure unit 29, an air pump 30, a first three-way valve 31, and a second three-way valve 32. The input ends of the negative pressure unit 29, the air pump 30, the first three-way valve 31, and the second three-way valve 32 are all electrically connected to an external control center. The output end of the negative pressure unit 29 is connected to one end of the first three-way valve 31 through a pipe. The other two ends of the first three-way valve 31 are respectively connected to two plastic pipes 1 through pipes. The output end of the air pump 30 is connected to one end of the second three-way valve 32 through a pipe. The other two ends of the second three-way valve 32 are respectively connected to two plastic pipes 1 through pipes. The working principle of the air pressure control component is as follows: Action 1: The first air passage 18 is under negative pressure. After the negative pressure machine 29 is powered on, it generates negative pressure. The first three-way valve 31 controls the disconnection of the second air passage 19 and opens the first air passage 18, so that the air pressure between the first three-way valve 31, the plastic tube 1 and the first air passage 18 is negative. Action 2: When the first airway 18 is under positive pressure, the air pump 30 generates positive pressure after being powered on. The second three-way valve 32 controls the disconnection of the second airway 19 and the opening of the first airway 18, so that the air pressure between the second three-way valve 32, the plastic tube 1 and the first airway 18 is positive. Action 3: Negative pressure in the second airway 19. After the negative pressure machine 29 is powered on, it generates negative pressure. The first three-way valve 31 controls the disconnection of the first airway 18 and the opening of the second airway 19, so that the air pressure between the first three-way valve 31, the plastic tube 1, and the second airway 19 is negative. Action 4: The second airway 19 is under positive pressure. After the air pump 30 is powered on, it generates positive pressure. The second three-way valve 32 controls the disconnection of the first airway 18 and the opening of the second airway 19, so that the air pressure between the second three-way valve 32, the plastic tube 1, and the second airway 19 is positive.

[0027] See appendix Figure 4 A positive and negative pressure control structure is installed inside the lens 51. The positive and negative pressure control structure controls the air pressure between the first latex film 11 and the second latex film 15 in two stages. Positive and negative pressure control structure: The positive and negative pressure control structure includes a water box 13, a transverse plate 14 and a limiting strip 28. The limiting strip 28 is arranged in a straight line along the axial direction of the lens 51 in the communicating groove 27, and the distance between the limiting strip 28 and the insertion frame 16 outside the first latex film 11 is equal to the width of the water box 13, so that the water box 13 is inserted between the limiting strip 28 and the insertion frame 16 along the axial direction of the lens 51. After the end cap 52 is put on, the end cap 52 seals the water box 13, so that the water box 13 is fixed. A transverse plate 14 is movably inserted in the connecting groove 27. The transverse plate 14 moves between the second latex membrane 15 and the water box 13. The limiting strip 28 moves through the transverse plate 14 to restrict the transverse plate 14 to move only laterally, ensuring the transverse stability of the transverse plate 14. The lower end of the transverse plate 14 becomes pointed. Ventilation holes 12 are provided on both the side of the water tank 13 closest to the first latex membrane 11 and the side closest to the transverse plate 14 to ensure airflow between the transverse plate 14, the water tank 13 and the first latex membrane 11. The lower end of the water box 13 is provided with an inlet 20, which moves downward and is inserted into the second air passage 19, so that the second air passage 19 is connected to the water box 13. The transverse plate 14 is located at the port of the first air passage 18, and the opening width of the first air passage 18 is greater than the thickness of the lower end of the transverse plate 14. How the positive and negative pressure control structure works: Action a: The second airway 19 is under positive pressure and the first airway 18 is under positive pressure. Actions two and four of the air pressure control component are executed. The gas completely fills the space between the first latex membrane 11 and the second latex membrane 15. The air pressure bulges the first latex membrane 11 into the nozzle 9 until the nozzle 9 is blocked. Similarly, the air pressure bulges the second latex membrane 15 into the suction channel 6. Action b: The second airway 19 is under negative pressure and the first airway 18 is under positive pressure. Actions two and three of the air pressure control component are executed. At this time, the airflow will push the transverse plate 14 toward the water box 13 until the transverse plate 14 adheres to the water box 13. At this time, the transverse plate 14 and the first latex membrane 11 block the air holes 12 on both sides of the water box 13. The first latex membrane 11 is tightly attached to the water box 13 and will not bulge. At the same time, the air pressure between the transverse plate 14 and the second latex membrane 15 increases, so that the second latex membrane 15 bulges toward the suction channel 6, and the inner diameter of the end of the suction channel 6 is reduced. Action c: The second airway 19 is under negative pressure and the first airway 18 is under negative pressure. Actions one and three of the air pressure control component are executed. At this time, the air between the first latex membrane 11 and the second latex membrane 15 is completely drawn away, the air pressure decreases, so that the first latex membrane 11 is tightly attached to the water box 13, and the second latex membrane 15 is concave inward, and the inner diameter of the end of the suction channel 6 increases. When performing action a, it is to use the first latex film 11 to block the nozzle 9; When performing action b, the goal is to reduce the inner diameter of the suction channel 6 without blocking the nozzle 9. When performing action c, the goal is to increase the inner diameter of the suction channel 6 without blocking the nozzle 9. Therefore, when alternating between actions b and c, the inner diameter of the suction channel 6 can be continuously increased and decreased to intermittently squeeze the debris in the end of the suction channel 6 and avoid blockage.

[0028] As attached Figure 2 and attached Figure 5 As shown, the connector includes a rotating ring 4, a plug 21, a notch 22, and a limiting member; One end of the insertion rod 21 is fixedly connected to the end of the lens group 5. There is no less than one insertion rod 21. The other end of the insertion rod 21 is provided with a recessed annular groove and is movably inserted into the lens tube 3. A rotating ring 4 is rotatably sleeved on the outside of the end of the lens tube 3. The outer side of the rotating ring 4 has a circular array of friction-increasing grooves 23. The upper edge of the rotating ring 4 is radially inserted into the annular groove of the insertion rod 21, so that the rotating ring 4 restricts the insertion rod 21 from being pulled out. A notch 22 is provided on the inner side of the rotating ring 4. When the rotating ring 4 rotates to the notch 22 aligned with the insertion rod 21, the insertion rod 21 can be pulled out from the notch 22. To prevent the rotating ring 4 from rotating arbitrarily, a limiting component is installed between the rotating ring 4 and the lens tube 3. When the notch 22 is misaligned with the insertion rod 21, the limiting component can temporarily fix the rotating ring 4 to the lens tube 3. The connector works as follows: the upper edge of the rotating ring 4 locks the annular groove of the insertion rod 21, preventing the insertion rod 21 from being pulled out. When the rotating ring 4 rotates to the notch 22 aligned with the insertion rod 21, the insertion rod 21 can be pulled out from the notch 22.

[0029] As shown in the attached diagram. Figure 2 and attached Figure 5 As shown, the limiting component includes a spring 24 and a pin 25. A groove 26 is provided on the lower side of the rotating ring 4. The upper end of the pin 25 is semi-circular and can be inserted into the groove 26. The lower end of the pin 25 can be inserted into the lens tube 3 and is fixedly connected to the lens tube 3 by the spring 24. The spring 24 pushes the pin 25 to insert the pin 25 into the groove 26. The limiting component works as follows: the spring 24 continuously applies an upward pushing force to the pin 25, so that the upper end of the pin 25 always tends to be inserted into the groove 26, thus fixing the rotating ring 4. Since the upper end of the pin 25 is semi-circular, when the rotating ring 4 is forcibly rotated, the inner wall of the groove 26 will press the pin 25 downward through the semi-circular surface, so that it overcomes the elastic force of the spring 24 and temporarily exits the groove 26. This process is repeated to achieve temporary fixation of the rotating ring 4 during rotation.

[0030] The working principle of this device is as follows: The pneumatic control component controls the opening and closing of the negative pressure machine 29 or air pump 30 with the first air passage 18 or the second air passage 19 by switching the first three-way valve 31 and the second three-way valve 32, respectively. Thus, in the four actions of the pneumatic control component, independent air passage control is achieved for the negative pressure of the first air passage 18, the positive pressure of the first air passage 18, the negative pressure of the second air passage 19, and the positive pressure of the second air passage 19. The coordination of these air pressure changes is transmitted to the positive and negative pressure control structure through the plastic tube 1, causing the air pressure between the first latex membrane 11 and the second latex membrane 15 to change accordingly. This drives the first latex membrane 11 to bulge towards the nozzle 9 or press against the water box 13 to open or close the nozzle 9, and drives the second latex membrane 15 to bulge into the suction channel 6 or recess into the connecting groove 27 to control the change of the inner diameter of the suction channel 6.

[0031] It should be noted that in the description of this invention, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate direction or positional relationship, are based on the appendix. Figure 1 The directions or positional relationships shown are merely for descriptive purposes and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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 invention according to the specific circumstances.

[0033] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. An auxiliary fluid delivery device for endoscopic ultrasound examination, characterized in that, It includes a mirror body (2) and a lens assembly (5). The mirror body (2) is connected to a mirror tube (3). The other end of the mirror tube (3) is detachably and fixedly connected to the lens assembly (5) via a connector. A suction channel (6) and a nozzle (9) are connected between the lens assembly (5), the mirror tube (3) and the mirror body (2). A connecting groove (27) is provided in the lens assembly (5). The connecting groove (27) connects the suction channel (6) and the end of the nozzle (9). A first latex film (11) and a second latex film (15) are respectively installed in the two ends of the connecting groove (27). The lower side of the connecting groove (27) is provided with a first air passage (18) and a second air passage (19). The ports of the first air passage (18) and the second air passage (19) are located between the first latex film (11) and the second latex film (15). The first air passage (18) and the second air passage (19) extend out of the lens tube (3) and the lens body (2) and are connected to a plastic tube (1). The plastic tube (1) is connected to the air pressure control component. A positive and negative pressure control structure is installed in the connecting groove (27). The positive and negative pressure control structure is installed at the ports of the first air passage (18) and the second air passage (19). The positive and negative pressure control structure controls the air pressure between the first latex membrane (11) and the second latex membrane (15).

2. The auxiliary fluid delivery device for endoscopic ultrasound examination according to claim 1, characterized in that, The lens assembly (5) includes a lens (51) and an end cap (52); One end of the lens (51) is detachably fixed to the end of the end tube (3) via a connector, and the other end of the lens (51) is covered with an end cap (52). Both the end cap (52) and the lens (51) are made of medical polymer plastic, and the end cap (52) covers the end of the lens (51). A connecting groove (27) is provided at one end of the lens (51) near the end cap (52), and the end cap (52) covers the sealing connecting groove (27).

3. The auxiliary fluid delivery device for endoscopic ultrasound examination according to claim 2, characterized in that, The connecting groove (27) has slots (17) at both ends, and insert frames (16) are movably inserted into each slot (17). The insert frames (16) are located between the end cap (52) and the lens (51), and the first latex film (11) and the second latex film (15) are fixedly connected in the two insert frames (16).

4. The auxiliary fluid delivery device for endoscopic ultrasound examination according to claim 2, characterized in that, The positive and negative pressure control structure includes a water box (13), a transverse plate (14), and a limiting strip (28). The limiting strip (28) is arranged in a straight line along the axis of the lens (51) in the connecting groove (27). The water box (13) is inserted between the limiting strip (28) and the insert frame (16) along the axis of the lens (51). The end cap (52) seals the top of the water box (13). A transverse plate (14) is movably inserted in the connecting groove (27), and a limiting strip (28) moves through the transverse plate (14). The water box (13) is provided with vents (12) on the side near the first latex membrane (11) and on the side near the transverse plate (14). The lower end of the water box (13) is provided with a socket (20), which can be inserted downward into the second air passage (19); The transverse plate (14) is located at the port of the first air passage (18), and the opening width of the first air passage (18) is greater than the thickness of the lower end of the transverse plate (14).

5. The auxiliary fluid delivery device for endoscopic ultrasound examination according to claim 4, characterized in that, The distance between the limiting strip (28) and the insert frame (16) outside the first latex film (11) is equal to the width of the water box (13).

6. The auxiliary fluid delivery device for endoscopic ultrasound examination according to claim 1, characterized in that, The pneumatic control assembly includes a negative pressure unit (29), an air pump (30), a first three-way valve (31), and a second three-way valve (32). The output end of the negative pressure unit (29) is connected to one end of the first three-way valve (31) through a pipe. The other two ends of the first three-way valve (31) are respectively connected to two plastic pipes (1) through pipes. The output end of the air pump (30) is connected to one end of the second three-way valve (32) through a pipe. The other two ends of the second three-way valve (32) are respectively connected to two plastic pipes (1) through pipes.

7. The auxiliary fluid delivery device for endoscopic ultrasound examination according to claim 1, characterized in that, The connector includes a rotating ring (4), a plug (21), a notch (22), and a limiting member; One end of the insertion rod (21) is fixedly connected to the end of the lens assembly (5), and the other end of the insertion rod (21) is provided with a recessed annular groove. The insertion rod (21) is movably inserted into the lens tube (3). A rotating ring (4) is rotatably sleeved on the outside of the end of the lens tube (3). The upper edge of the rotating ring (4) is movably inserted into the annular groove of the insertion rod (21) along the radial direction. A notch (22) is provided on the inner side of the rotating ring (4). After the rotating ring (4) rotates, the notch (22) aligns with the insertion rod (21). A limiting member is installed between the rotating ring (4) and the lens tube (3) to temporarily fix the rotating ring (4).

8. The auxiliary fluid delivery device for endoscopic ultrasound examination according to claim 7, characterized in that, The limiting component includes a spring (24) and a pin (25). A groove (26) is provided on the lower side of the rotating ring (4). The upper end of the pin (25) is semi-circular and moves up and down into the groove (26). The lower end of the pin (25) moves up and down into the lens tube (3) and is fixedly connected to the lens tube (3) by a spring (24). The spring (24) pushes the pin (25) to insert the pin (25) into the groove (26).

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