Endoscope instrument tube outlet structure, tip assembly, insertion section, and endoscope

Abstract

The application discloses an endoscope instrument pipe outlet structure, a front end assembly, an insertion part and an endoscope, and belongs to the technical field of medical instruments, to solve the technical problem that in related technologies, when the diameter of the insertion part is reduced, the instrument is inconvenient to operate and is easy to damage tissues. The outlet structure comprises a front end seat, a pipe mouth section and a baffle. The baffle has two states of opening and closing relative to the pipe mouth section. In the opening state, the baffle is away from the distal end port of the pipe mouth section, and is used for making the angle between the axis of the channel formed by the distal end of the baffle and the circumferential side of the front end seat and the angle between the axis of the channel formed by the proximal end of the baffle and the circumferential side of the front end seat smaller than the angle between the optical axis of the lens illumination assembly and the optical axis of the lens. In the closing state, the baffle is attached to the distal end port of the pipe mouth section. In the opening state of the baffle, the instrument insertion path can be closer to the direction of the optical axis of the lens, the deflection angle is reduced, and the risk of scraping tissues is reduced.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to an endoscope instrument tube outlet structure, a front end component, an insertion part, and an endoscope. Background Technology

[0002] An endoscope is a commonly used medical device that can directly enter the body's natural channels, providing doctors with ample diagnostic information for disease treatment. Handheld medical endoscopes typically consist of a handle and an insertion section attached to the handle for insertion into the body's natural cavities. The insertion section includes a distal camera and illumination unit. An instrument tube extends from the handle and runs through the insertion section to its distal end, creating a channel for water and / or air and / or instrument movement.

[0003] Reducing the diameter of the endoscope insertion section not only helps alleviate patient discomfort during examinations or surgeries, but also expands the application range of endoscopes, allowing them to reach narrower parts of the body for observation or manipulation.

[0004] To reduce the diameter of the insertion section, existing endoscopes typically align the instrument tube and lens assembly radially, with the instrument tube's outlet located at least partially on the periphery of the anterior assembly. This makes the instrument prone to slipping out of the field of view, requiring more effort to bring it back into view. Furthermore, to bring the instrument back into view, it needs to be extended further, making it more prone to wobbling and increasing the inconvenience and risk of damaging body cavities.

[0005] Therefore, providing an endoscopic instrument tube outlet structure that can reduce the diameter of the insertion part while preventing the instrument from deviating from the field of vision is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] This invention discloses an endoscope instrument tube outlet structure, a front end component, an insertion part, and an endoscope, in order to solve the technical problems in related technologies where reducing the diameter of the insertion part leads to inconvenient instrument operation and easy tissue damage.

[0007] To solve the above problems, the present invention adopts the following technical solution:

[0008] In one aspect, this application provides an endoscope instrument tube outlet structure, which includes a front end seat, a tube end section, and a baffle.

[0009] Specifically, the front end housing has an internal mounting area for mounting the lens illumination assembly; the tube end section, along the axial direction of the instrument tube body, has its distal end connected to the periphery of the front end housing and its proximal end connected to the instrument tube body; the baffle has two states relative to the tube end section: open and closed. In the open state, the baffle is away from the distal end of the tube end section, so that the axis of the channel formed by the distal end of the baffle and the periphery of the front end housing is smaller than the axis of the channel formed by the proximal end of the baffle and the periphery of the front end housing with the optical axis of the lens illumination assembly; in the closed state, the baffle is in contact with the distal end of the tube end section.

[0010] The technical solution provided above can achieve the following beneficial effects:

[0011] By switching the baffle between "open" and "closed" states, the axis of the access channel is dynamically adjusted, allowing the instrument insertion path to be closer to the lens optical axis. This reduces the instrument's deflection angle relative to the insertion point, thereby lowering the risk of tissue abrasion. In the open state, the angle between the access channel axis and the lens optical axis is smaller, meaning the instrument can extend more "positively," reducing the insertion angle and avoiding lateral impact on the mucosa, thus improving safety and patient comfort.

[0012] Secondly, this application provides a front-end component that has the same technical features as the pipe structure provided in this application and can achieve the same technical effect, which will not be elaborated here.

[0013] Thirdly, this application provides an insertion part that has the same technical features as the tube structure provided in this application and can achieve the same technical effect, which will not be described in detail here.

[0014] Fourthly, this application provides an endoscope that has the same technical features as the orifice structure provided in this application and can achieve the same technical effect, which will not be elaborated here. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 These are schematic diagrams of the internal structure of endoscopes provided in some embodiments;

[0017] Figure 2This is a longitudinal section diagram of the endoscope front end assembly provided in some embodiments (the dashed lines in the figure represent the optical axis of the lens illumination assembly, the axis of the first outlet channel, and the axis of the second outlet channel).

[0018] Figure 3 yes Figure 3 A schematic diagram of the longitudinal section of the structure after the elastic ring is removed.

[0019] Figure 4 yes Figure 3 A schematic diagram of the structure in its closed state;

[0020] Figure 5 This is a side view of the endoscope tip assembly provided in some embodiments;

[0021] Figure 6 yes Figure 5 The structure shown is a side view with a sealing ring;

[0022] Figure 7 These are three-dimensional structural diagrams of endoscope front-end components provided in some embodiments;

[0023] Figure 8 yes Figure 7 The diagram shows a three-dimensional structure with a sealing ring.

[0024] Figure 9 This is a three-dimensional schematic diagram of the closed state of the endoscope tip assembly provided in some embodiments;

[0025] Figure 10 This is a longitudinal section diagram of an irregularly shaped endoscope front-end component provided in some embodiments;

[0026] Figure 11 yes Figure 10 A schematic diagram of the longitudinal section structure in the closed state;

[0027] Figure 12 yes Figure 4 A magnified structural diagram of part A in the middle.

[0028] In the picture:

[0029] 10. Front end component; 20. Insertion part; 30. Handle; 40. Endoscope;

[0030] 100. Instrument tube body;

[0031] 200. Pipe opening section; 210. Stop block; 211. Clearance section; 220. Far port; 230. Exit channel; 231. First exit channel; 232. Second exit channel; 240. Near port;

[0032] 300, baffle plate; 310, first baffle section; 320, second baffle section;

[0033] 400. Front mount; 410. Elastic ring; 411. Covering surface;

[0034] 500. Lens illumination assembly;

[0035] a. Optical axis; b. First exit channel axis; c. Second exit channel axis; d. Inner wall guide extension line; α. Included angle. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0037] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0038] In the various embodiments of this application, "proximal end" and "distal end" refer to the position of the endoscope and its components and accessories relative to the user in the usage environment. The end closer to the user is designated as the "proximal end", and the end farther from the user is designated as the "distal end".

[0039] To reduce the diameter of the insertion section, existing endoscopes typically align the instrument tube and lens assembly radially, with the instrument tube's outlet located at least partially on the periphery of the anterior assembly. However, this arrangement results in the instrument tube's outlet not being parallel to the lens's optical axis, creating a significant angle between the instrument and the lens's optical axis. This makes the instrument prone to slipping out of the field of view, requiring more effort to bring it back into view. Furthermore, to bring the instrument back into view, it needs to be extended further, increasing its susceptibility to movement and making operation inconvenient, while also increasing the risk of damage to body cavities and tissues.

[0040] The following is in conjunction with the appendix Figures 1 to 12This application provides a detailed description of an endoscope instrument tube outlet structure, front end component, insertion part, and endoscope through specific embodiments and application scenarios.

[0041] This application provides an endoscope instrument tube outlet structure, which includes a front end seat 400, a tube end section 200, and a baffle 300. The front end seat 400 has an internal mounting area for mounting a lens illumination assembly 500. For example, Figures 2-9 As shown, the front end mount 400 is the seat of the curved tube front end assembly 10 of the endoscope 40 insertion section 20, and is the core part of the endoscope 40 system. The front end mount 400 can be used to mount the lens illumination assembly 500, and then the lens illumination assembly 500 can be used to acquire real-time images inside the body. The mounting area of ​​the lens illumination assembly 500 is usually a hole or slot on the distal end face of the front end mount 400 to facilitate the installation and framing of the lens illumination assembly 500.

[0042] In some embodiments, the nozzle section 200 is integrally disposed on the distal end side of the instrument tube body 100 in the axial direction. The proximal port 240 of the nozzle section 200 is used to connect to the distal port of the instrument tube body 100 for receiving fluid and instruments from the instrument tube body 100. The distal port 220 of the nozzle section 200 is disposed on the periphery of the front end seat 400 to provide an outlet for fluid, instruments, etc., guided therethrough by the nozzle section 200. For example, Figures 2-9 As shown, the tube opening 200 is configured to coincide with the front end seat 400 in the radial direction. The proximal port 240 is used to connect to the instrument tube body 100 to allow various therapeutic instruments (such as biopsy forceps, cell brushes, hemostatic clips, snares, injection needles, etc.) to pass through. The distal end connects to the periphery of the front end seat 400 to allow the instrument to extend, so as to perform operations such as biopsy, polyp removal, hemostasis, and foreign body removal; or to spray physiological saline to clean the lens and field of view, and to aspirate blood, secretions, air bubbles, etc.

[0043] In this embodiment, the distal port 220 of the nozzle segment 200 is disposed on the periphery of the front end seat 400, and the nozzle segment 200 and the lens illumination assembly 500 are at least partially overlapped in the radial direction of the front end assembly 10. This can reduce the diameter of the front end seat 400, which not only helps to reduce the pain of patients during examination or surgery, but also allows the endoscope 40 to reach narrower body parts for observation or operation.

[0044] In some embodiments, the baffle 300 is disposed on the periphery of the front end seat 400 and at the distal port 220 of the nozzle section 200. The baffle 300 can be flipped relative to the periphery of the front end seat 400 to approach or move away from the distal port 220 of the nozzle section 200.

[0045] When the baffle 300 approaches the periphery of the front end seat 400 to a certain extent, the baffle 300 can fit against the far end 220 of the pipe section 200. At this time, the baffle 300 is in a closed state relative to the far end 220 of the pipe section 200.

[0046] When the baffle 300 moves away from the periphery of the front end seat 400 to a certain extent, the baffle 300 disengages from the distal port 220 of the tube opening section 200. At this time, the baffle 300 is further away from the distal port 220 of the tube opening section 200 than the baffle 300 in the closed state. This allows the first exit channel axis b formed by the distal end of the baffle 300 and the periphery of the front end seat 400 to form a smaller angle with the optical axis a of the lens illumination assembly 500 than the second exit channel axis c formed by the proximal end of the baffle 300 and the periphery of the front end seat 400.

[0047] For example, such as Figure 4 , Figure 9 and Figure 11 As shown, the baffle 300 is configured as an elastic element, possessing elasticity to maintain a free shape. The baffle 300 is disposed around the front end seat 400 and arranged generally longitudinally, with the proximal end of the baffle 300 connected to the front end seat 400 and the distal end facing the distal end of the front end seat 400. Of course, in some embodiments, the proximal end of the baffle 300 may also be connected to the distal end of the instrument tube body 100.

[0048] In its free state, the baffle 300, under its own elastic force, tends to radially approach the distal port 220 of the nozzle section 200 to achieve a free form. At this time, the baffle 300 just contacts the distal port 220 of the nozzle section 200 and reaches a free form, or it is tightly attached to the distal port 220 of the nozzle section 200 and maintains a stable state before reaching a free form, so that the baffle 300 is in a closed state that at least partially blocks the distal port 220. During non-use processes such as storage and transportation, the baffle 300 in the closed state can reduce the impact of environmental factors on the nozzle section 200.

[0049] In the initial stable state, the baffle 300 and the distal port 220 of the tube segment 200 have good closure and will not be easily opened. For example, when the insertion part 20 of the endoscope 40 is inserted into the target cavity in a narrow cavity, the baffle 300 can fit tightly against the distal port 220 of the tube segment 200 of the endoscope 40 instrument tube outlet structure of the front end component 10 through elasticity. This can effectively prevent the cavity tissue from squeezing the outer wall of the baffle 300, causing the baffle 300 to be pushed away from the distal port 220 of the tube segment 200 and accidentally opening. It can effectively maintain the outer diameter of the front end component 10 when it is advanced in the cavity, ensuring that the insertion part 20 can be smoothly inserted into the target cavity.

[0050] During use, the baffle 300 is in a closed state during the insertion of the endoscope 40. The baffle 300 is close to the periphery of the front seat 400 and contacts and adheres to the distal port 220 of the orifice segment 200. This prevents the distal port 220 or the edge of the baffle 300 from causing damage to the patient's tissue during insertion. Especially when the baffle 300 is in its initial stable state, it is tightly attached to the edge of the distal port 220 of the orifice segment 200. Compared to simply contacting and adhering to the edge of the distal port 220, this method better prevents damage to the patient's tissue during insertion.

[0051] like Figure 2 , Figure 3 , Figures 5-8 and Figure 11 As shown, after the endoscope 40 inserts the insertion part 20 into the target cavity, when it is necessary to clean, observe, or operate the target through the front end assembly 10, the instrument or fluid enters from the proximal port 240 of the port section 200 and exits from the distal port 220. When the instrument or fluid reaches the distal port 220 of the port section 200, a thrust acts on the inner surface of the baffle 300. An appropriate thrust can cause the baffle 300 to move radially away from the distal port 220 of the port section 200, thereby switching from a closed state that is in contact with the edge of the distal port 220 to an open state that is detached from the edge of the distal port 220.

[0052] In the open state where only the instrument is inserted, the instrument pushes aside the baffle 300 and finally exits from the distal port 220 of the tube segment 200, which is located around the front end seat 400. Since there is an angle α between the axis of the exit channel 230 and the optical axis a of the lens illumination assembly 500, if the instrument extends directly along the axis of the distal port 220 of the tube segment 200, the angle between the instrument and the optical axis a of the lens illumination assembly 500 will be approximately the same as the angle α. At this time, the function of the baffle 300 is to tightly fit the instrument under its own elasticity and convert part of the elastic force of its own restoring deformation (near the periphery of the front end seat 400) into pressure on the instrument, causing the instrument to move closer to the periphery of the front end seat 400, thereby allowing the instrument to extend as far as possible along the direction of the first exit channel axis b, correcting the deflection angle of the instrument, and making the angle between the extension direction of the instrument and the optical axis a of the lens illumination assembly 500 smaller.

[0053] In the open state where only fluid is supplied, the fluid pushes aside the baffle 300 and eventually exits from the distal port 220 of the tube section 200, which is located around the front end seat 400. Under the action of the baffle 300, the angle between the fluid's exit direction and the optical axis a of the lens illumination assembly 500 is also smaller.

[0054] In this embodiment, the baffle 300, when open, corrects the direction of the instrument or fluid exit, making the path of the instrument or fluid exiting the front end seat 400 closer to the optical axis a of the lens, reducing the deflection angle and lowering the risk of tissue abrasion. When the baffle 300 is open due to the action of the instrument and / or fluid, the angle between the axis c of the second exit channel and the optical axis a of the lens is smaller, and the instrument extends more "positively," effectively avoiding lateral impact on the mucosa and improving patient comfort and safety. When the baffle 300 is closed due to its own elasticity after the action of the instrument and / or water flow is removed, the baffle 300 fits against the distal port 220 of the tube opening 200, keeping the size of the front end assembly 10 relatively small, facilitating its movement within the body cavity. This forms an effective seal, preventing backflow of body fluids and blood into the instrument tube, ensuring instrument cleanliness and system sealing. The baffle 300 can be opened and closed without an additional drive mechanism. It can be opened by the insertion force of the instrument or the impact force of the fluid. After the fluid is pulled out or closed, it automatically springs back to close. The structure is simple and reliable, which is in line with the trend of miniaturization and passive design of minimally invasive instruments.

[0055] In some embodiments, the front-end mount 400 is not limited to Figures 2-9 The regular cylindrical shape shown can also be an irregular shape, such as one where the distal and proximal ends are partially offset and partially overlap in the radial direction, i.e., there is a certain angle between the front end 400 and the optical axis a direction of the lens illumination assembly 500. For example, as... Figure 10 and Figure 11 As shown, in the case where the front end 400 has an irregular shape, the distal and proximal ends of the front end 400 are radially offset. The distal end face is used to house the lens illumination assembly 500, and the proximal end is used to connect the instrument tube body 100, thus achieving partial offset and partial overlap between the instrument tube body 100 and the lens illumination assembly 500. The distal port 220 of the nozzle section 200 can be opened on the periphery of the offset distal and proximal ends of the front end 400. With this arrangement, the lens illumination assembly 500 at the front end is partially offset from the nozzle section 200 through the irregular structure of the front end 400. This ensures that the diameter of the front end of the front end 400 is as small as possible, while also ensuring that the angle between the nozzle section 200 and the lens illumination assembly 500 is as small as possible. The baffle 300 can more easily correct the exiting instrument, making it easier for the instrument to appear in the imaging field of view of the lens illumination assembly 500.

[0056] In this embodiment, the lens illumination assembly 500 is located on the distal end face, and the instrument tube is connected to the proximal end. Since they are not in the same axial position, this avoids the "space-hogging" conflict between the lens illumination assembly 500 and the instrument tube within the confined front-end space. The outer diameter of the front end of the front-end seat 400 can be made as small as possible; a smaller outer diameter means lower tissue expansion requirements, thereby reducing patient discomfort. The overall angle between the tube opening section 200 and the optical axis a of the lens illumination assembly 500 can be small, making it easier for the baffle 300 to correct it, thus ensuring a smaller angle between the axis c of the second outlet channel and the optical axis a of the lens illumination assembly 500. However, while the irregular structure of the front end 400 causes the lens illumination assembly 500 and the nozzle section 200 to be radially offset, thus reducing the front diameter of the front end 400, the axial projection of the entire section from the proximal end to the distal end of the front end 400 does not decrease but rather increases. Even with some transition structures, the irregular shape of the irregular structure still affects the operation during insertion and may even damage tissue. Furthermore, the large radius at the junction of the front and rear ends of the irregular structure also affects the operation and is prone to damage.

[0057] In some embodiments, the nozzle section 200 is entirely disposed within the front end seat 400; the instrument tube body 100 and the lens illumination assembly 500 at least partially overlap radially. For example, Figures 2-9 As shown, the front end 400 is configured as a generally regular cylindrical body, and the nozzle section 200 is completely disposed within the front end 400, extending from the near port 240 located at the proximal end to the far port 220 located at the distal end. The near port 240 is formed on the proximal end face of the front end 400, and the far port 220 is formed on the circumferential surface of the front end 400. The near port 240 of the nozzle section 200 is closer to the center of the front end 400 than the far port 220 so as to be radially offset from the lens illumination assembly 500 disposed on the front end 400, which allows the diameter of the front end portion of the front end 400 to be as small as possible.

[0058] In this embodiment, the tube end section 200 is embedded inside the front end seat 400, making full use of the limited space at the front end of the front end seat 400, avoiding the convex structure from increasing the outer diameter or affecting the field of vision, and reducing the front diameter. This not only helps to reduce the pain of patients during examination or surgery, but also allows the endoscope 40 to reach narrower body parts for observation or operation.

[0059] In some embodiments, when the baffle 300 is in the open state, the distal end of the baffle 300 is parallel to the optical axis a of the lens of the lens illumination assembly 500. At this time, the force of the instrument or fluid on the baffle 300 and its own restoring force are in a force balance state. Alternatively, the baffle 300 is further restricted by a limiting member to keep the baffle 300 in a force balance state.

[0060] The limiting component can be a limiting block set on the front end seat 400 to limit the maximum opening of the baffle 300. Alternatively, the limiting component can be set on the bent part of the baffle 300 to limit the maximum opening of the baffle 300 by limiting the maximum bending shape of the bent part.

[0061] For example, such as Figure 2 , Figure 3 , Figures 5-8 and Figure 11 As shown, the distal end of the baffle 300 is parallel to the optical axis a of the lens of the lens illumination assembly 500. After the instrument extends out of the tube section 200, when it is limited by the baffle 300 or when the baffle 300 itself is in a state of force balance, the extension direction or jet direction of the instrument or fluid is also parallel to the optical axis a of the lens illumination assembly 500.

[0062] In this embodiment, the direction of the instrument or fluid outlet can be aligned with the observation direction (i.e., parallel and nearly coaxial). When the instrument extends forward, the operator can more easily determine the direction and extension length of the instrument, which can significantly improve the accuracy of operation. This reduces the need for repeated angle adjustments and allows for faster instrument positioning, thereby saving surgical time. At the same time, instruments extending forward can also effectively avoid oblique punctures or scratches, making it particularly suitable for operations on fragile tissues (such as gastric mucosa and bronchial walls). Instrument positioning is faster and there is no need for repeated angle adjustments.

[0063] After the fluid is ejected from the distal port 220, it can flow more concentratedly to the distal side parallel to the optical axis a of the lens illumination assembly 500, which can have a better cleaning effect on instruments, tissues or environment in the field of view, and help maintain a clear surgical field. In addition, the more concentrated fluid can also provide better heat dissipation for the extended instruments, such as helping to remove the heat generated by lithotripsy at the tip of the holmium laser fiber.

[0064] In some embodiments, along the axial direction of the instrument tube body 100, the baffle 300 includes at least two end-to-end baffle segments. These segments bend from proximal to distal towards the periphery of the front seat 400. In adjacent segments, the proximal end of the distal segment connects to the distal end of the proximal segment, such that the angle of bending of the segments from proximal to distal towards the periphery of the front seat 400 gradually increases. This is to ensure that, when the baffle 300 is in the open state, the angle between the axis b of the first exit channel formed by the distal segment and the periphery of the front seat 400 and the axis c of the second exit channel formed by the proximal segment and the periphery of the front seat 400, and the optical axis a of the lens illumination assembly 500, is smaller. For example, the baffle 300 may have three segments. Under normal circumstances, when fluid is introduced into the instrument tube alone, the fluid can push open the baffle 300 at the normal perfusion flow rate; when an instrument is introduced into the instrument tube alone, the instrument can easily push open the baffle 300. In some application scenarios, after the front-end component 10 reaches the target cavity, the perfusion water flow continues, during which time an instrument can be inserted into the target cavity through the instrument tube to complete related operations in conjunction with the perfusion water flow; in all three cases, the third segment of the baffle 300 at its distal end can be parallel to the optical axis a of the lens illumination component 500 when it is in the open state; at the same time, the instrument or water flow in the balanced state is also parallel to the optical axis a of the lens illumination component 500. By setting the baffle 300 as a multi-segment baffle, the angle between the first segment of the proximal end and the tube opening segment 200 is also smaller, and the resulting edge is also smoother.

[0065] In this embodiment, a curved transition structure is formed by multiple baffles, which allows the instrument to smoothly turn from the tube body to the front outlet, avoiding wear or jamming caused by sharp bends, and preventing the edge at the junction of the baffle 300 and the tube opening 200 from scratching the patient's tissue; the curved distal baffle guides the instrument to naturally align with the optical axis a, which facilitates operation and imaging, reduces damage, and disperses stress.

[0066] In some embodiments, the baffle 300 is configured as two segments, including a first baffle 310 and a second baffle 320 sequentially connected from the proximal end to the distal end, the first baffle 310 and the second baffle 320 conforming to the circumferential extension of the front end seat 400. The baffle 300 conforming to the circumferential extension of the front end seat 400, with the first baffle 310 and the second baffle 320 having an included angle, is an example, such as... Figure 2 and Figure 9 As shown, when the first stop 310 and the second stop 320 are attached to the extension of the front end seat 400, the extension surface is also composed of multiple extension surfaces through the setting of multiple stop sections. This avoids the sharp edge formed by the direct contact between the peripheral side of the front end seat 400 and the extension surface of a stop, thus preventing the sharp edge from scratching the patient's tissue during insertion and operation.

[0067] In this embodiment, the two baffles together cover the edge of the distal port 220 of the tube segment 200 on the front end seat 400, achieving a circumferential fit and seal, and completely preventing liquid seepage. The circumferential contact provides a more uniform sealing pressure, maintaining the seal even with slight deformation. The circumferential extension design ensures that the baffle 300 is subjected to uniform force, making it less prone to warping or partial detachment. Furthermore, the angle of contact between the baffle and the distal port 220 of the tube segment 200 is distributed by multiple surfaces, avoiding the situation where a single plane of the baffle is in contact with the plane of the distal port 220 of the tube segment 200, thus avoiding a sharp edge when a single plane contacts a plane. The multiple surfaces formed by the extension of multiple baffles smooth the edge of the distal port 220 of the tube segment 200, effectively preventing it from scratching the patient's tissue.

[0068] In some embodiments, when the baffle 300 is in the closed state, the first baffle 310 and the second baffle 320 extend along the circumferential side of the front end seat 400, circumferentially contacting the edge of the distal port 220 of the nozzle segment 200 and shielding the nozzle segment 200. For example, as... Figure 9 As shown, when the first stop section 310 and the second stop section 320 extend to the periphery of the front end seat 400 and contact the edge of the distal port 220 of the pipe section 200, the distal end of the second stop section 320 also contacts the front end seat 400. At the same time, there is no gap between the surface of the baffle 300 and the distal port 220 of the pipe section 200. Therefore, in the closed state, the distal port 220 of the pipe section 200 is completely closed.

[0069] In this embodiment, when the baffle 300 is in the closed state, it seals the distal port 220 of the tube opening section 200, which can prevent body fluids and blood from flowing back into the instrument tube, ensuring the cleanliness of the instrument and the system's airtightness. This ensures that the tube opening section 200 is not affected by the external environment when it is not in use or inserted. When fluid needs to be introduced, the baffle 300 closes the tube opening section 200, making it easier for the fluid to push open the baffle 300 and perform the corresponding operation.

[0070] In some embodiments, such as Figures 2-12 As shown, a stop 210 is also provided at the front end of the tube opening section 200. When the baffle 300 is in the closed state, the stop 210 is located on the distal side of the baffle 300 to at least partially cover the distal end of the baffle 300. This allows the step formed by the baffle 300 protruding from the peripheral wall of the front end seat 400 while adhering to the edge of the distal port 220 to be at least partially eliminated by the block 210. With this arrangement, the baffle 300 in the closed state is covered on the distal side in the insertion direction of the endoscope 40, which at least reduces the structural abrupt change at the mating part between the distal end of the baffle 300 and the distal port 220 of the tube opening section 200, making the distal port 220 of the tube opening section 200 smoother. This can effectively prevent the distal end of the baffle 300 from scraping the cavity wall during the insertion of the endoscope 40, and can reduce the insertion resistance of the insertion part 20 of the endoscope 40.

[0071] For example, such as Figure 12 As shown, when the baffle 300 is in the closed state, the baffle 210 cannot completely cover the distal head of the baffle 300 on its distal side; at least part of the edge of the distal head of the baffle 300 still protrudes from the baffle 210. This configuration effectively prevents the baffle 300 from opening unintentionally during the insertion of the endoscope 40 insertion section 20.

[0072] For example, when the baffle 300 is in the closed state, the stop 210 completely covers the distal head of the baffle 300 on its distal side, and the proximal end of the stop 210 at least partially protrudes from the distal head of the baffle 300. This configuration is more effective in protecting the baffle 300 during insertion compared to the previous technical solution; however, during the withdrawal of the insertion part 20, the portion of the proximal end of the stop 210 that at least partially protrudes from the baffle 300 is prone to scraping against the cavity wall during retraction.

[0073] For example, such as Figure 12 As shown, the proximal end of the stop 210, which is used to cover the distal end of the baffle 300, is configured to accommodate the distal head of the baffle 300. When the baffle 300 is in the closed state, the distal end of the baffle 300 can fit tightly into this recess. The recess is a U-shaped or semi-circular groove structure, and its size is adapted to the width and thickness of the distal end of the baffle 300 to accommodate and fix the distal head of the baffle 300. This configuration, with the recess accommodating and covering the distal head of the baffle 300, can further prevent the unplanned opening of the baffle 300 during the insertion of the endoscope 40 insertion section 20. In this embodiment, when the endoscope 40 is advanced inside the body, it may encounter compression from tissues, curved cavities, or other instruments. The stop block 210 blocks the distal end of the baffle 300 from the front, preventing external objects from accidentally pushing open the baffle 300 and avoiding unplanned opening of the tube opening section 200. It ensures that the baffle 300 is always in a "locked" state when not in use, preventing body fluids, blood, or secretions from flowing back into the main system through the instrument channel. It also avoids accidental extension of the instrument due to accidental opening, which could cause tissue perforation or damage. No additional control mechanism is required; automatic protection is achieved through the structure, which conforms to the design principle of simplicity and reliability of minimally invasive instruments.

[0074] In some embodiments, the distal end and periphery of the stop 210 and the distal end and periphery of the baffle 300 are rounded to make the front outlet of the nozzle section 200 smooth in the open state.

[0075] In this embodiment, the rounded corner design can eliminate sharp edges, reduce the scraping resistance between the endoscope 40 and instruments (such as biopsy forceps and snares) and the baffle 300 when they are inserted and removed, and improve the smoothness of operation; reduce the damage to the patient's tissues during the insertion and operation of the endoscope 40, and also prevent sharp edges from colliding with instruments and causing damage to the instrument sheath, thus extending the service life of the instruments; even in the open state, the exit edge remains smooth, reducing the risk of scratching the mucosa.

[0076] In some embodiments, when the baffle 300 is in the closed state, the distal end of the baffle 300 contacts the proximal end of the stop block 210. For example, when the baffle 300 is in the closed state of the tube segment 200, the distal end of the baffle 300 abuts against the proximal recess of the stop block 210. When the baffle 300 rebounds from the open to the closed state, the distal end of the baffle 300 moves closer to the proximal recess of the stop block 210 until it contacts and abuts against the proximal recess of the stop block 210.

[0077] In this embodiment, the stop block 210 contacts the distal end of the baffle 300, forming a stable support point, limiting the swaying or vibration of the baffle 300 in the closed state, and preventing the slight movement of the baffle 300 from affecting the overall stability of the front seat 400, thereby affecting image stability (especially under high-frequency breathing or heartbeat interference); the stop block 210 abuts against the baffle 300 to make the baffle 300 fit more tightly against the edge of the tube opening section 200, improving the sealing effect; when the baffle 300 is subjected to reverse pressure, the stop block 210 can absorb some of the impact energy, protecting the connection structure between the root of the baffle 300 and the tube opening section 200 from being damaged; the baffle 300 automatically aligns with the tube opening section 200 during the rebound closing process, improving the closure reliability.

[0078] In some embodiments, such as Figure 12 As shown, the portion of the stop 210 corresponding to the distal end of the nozzle section 200 has a clearance portion 211. The clearance portion 211 clearances the extending direction of the nozzle section 200 distally. The clearance portion 211 is formed at the proximal end of the stop 210 and further recessed relative to the peripheral wall of the nozzle section 200, such that the clearance portion 211 is located laterally to the inner wall guide extension line d of the nozzle section 200 for guiding the device or fluid, for accommodating the distal end of the stop 210. For example, as... Figures 2-4 and Figure 12As shown, the clearance portion 211 is formed by the indentation of the proximal end face of the stop 210, corresponding to the exit direction of the instrument in the orifice section 200. The indentation depth gradually increases from the proximal end to the distal end. The bottom of the indentation groove forms a slope that gradually moves away from the inner wall guide extension line d of the orifice section 200, and the distal end of the slope connects to the recess of the distal head of the receiving baffle 300. With this configuration, during the insertion of the endoscope 40 insertion portion 20, after the outer side of the baffle 300 is subjected to the blocking pressure from the tissue wall, the distal head of the baffle 300 can further move along the slope towards the front seat 4. As the baffle 300 moves further inward, the pressure on the distal end of the baffle 300 from the ramp gradually increases, preventing the baffle 300 from being directly retracted into the tube end section 200 along the ramp. The ramp can avoid the instrument exit while reserving a certain amount of space for the baffle 300 in its closed state, preventing the baffle 300 from being pressured by the tissue cavity wall during the insertion of the endoscope 40 insertion section 20 without room to move, and causing the force to concentrate at the connection with the front seat 400 or the instrument tube, thus causing damage to the connection.

[0079] When the baffle 300 is in the closed state, when fluid is introduced into the port section 200, the fluid can directly contact the distal head of the baffle 300 through the indentation. With the pressure and flow rate at the fluid inlet remaining constant, the area of ​​action of the fluid on the baffle 300 increases when it exits at the distal port 220 of the port section 200, but this may reduce pressure adaptability. However, for the baffle 300, as it rotates around the connection point (i.e., the proximal end) with the front seat 400 or the instrument tube, the fluid's effect on the distal end of the baffle 300 is stronger. Although the total force of the fluid may not change, the torque on the baffle 300's rotation around the proximal end increases, making the baffle 300 easier for the fluid to push open.

[0080] In this embodiment, although the stop 210 is used for protection, the avoidance part 211 avoids the actual movement path of the device, ensuring that the device can extend smoothly without affecting normal use. The stop 210 is arranged on the "front side" (i.e., the side front of the device's forward direction), which not only achieves shielding protection but also does not encroach on the main channel space, avoiding interference with design errors. Even if the device has a certain deflection angle, it will not collide with the stop 210. The slope formed by the indentation of the stop 210 can also reserve a certain buffer space for the baffle 300, and can make the torque of the fluid acting on the baffle 300 to make the baffle 300 rotate and open greater.

[0081] In some embodiments, the baffle 300 is connected proximal to the instrument tube body 100, and the baffle 300 is integrally formed with the front end of the instrument tube body 100. For example, Figure 2 , Figure 3 , Figure 10 and Figure 11As shown, the baffle 300 can be integrally injection molded with the instrument tube body 100. During assembly, the instrument tube body 100 and the baffle 300 shrink and insert into the proximal port 240 of the tube opening section 200. Then, the baffle 300 extends out from the distal port 220 of the tube opening section 200 and fits the distal port 220 of the tube opening section 200 under its own elasticity.

[0082] In this embodiment, the baffle 300 and the instrument tube body 100 are integrally formed, resulting in high overall structural strength. The connection point has no welding or adhesive joints, avoiding problems such as breakage or delamination at the connection, reducing assembly gaps in the instrument tube body 100, and lowering the risk of liquid infiltration. Both can be processed through injection molding in one step, resulting in high production efficiency and suitability for mass production. The integral design of the baffle 300 and instrument tube body 100 enhances their overall integrity. The baffle 300 also experiences tension from the instrument tube body 100 during its rebound from the distal end to the proximal end, ensuring a tighter fit between the baffle 300 and the distal end 220 of the tube opening section 200 when closed, and providing stronger corrective force for the instrument when open.

[0083] In some embodiments, the proximal end of the baffle 300 is connected to the port section 200 and is integrally formed with the front end seat 400. For example, Figure 4 and Figure 5 As shown, the baffle 300 is directly connected to the tube end section 200 and can be integrally injection molded with the front end seat 400. During the molding process, a hollow tube end section 200 and an installation area for mounting the lens illumination assembly 500 are simultaneously formed. When the baffle 300 is connected to the instrument tube body 100 at its proximal end, the instrument tube body 100 is directly inserted into the tube end section 200 to achieve the connection.

[0084] In this embodiment, the front end seat 400 is integrally molded, with high structural strength and no welding or bonding interfaces, avoiding problems such as breakage and delamination at the connection. The front end seat 400 can be injection molded in one piece, which has high production efficiency and is suitable for mass production. The baffle 300 is integrally molded with the front end seat 400, making the front end seat 400 more integrated. The baffle 300, as a "flip-top" structure of the front end seat 400, is opened by the instrument and resets elastically when closed. The operation of the baffle 300 is not affected by the proximal instrument tube body 100.

[0085] In some embodiments, the instrument tube outlet structure further includes an elastic ring 410, which is sleeved around the outer periphery of the front end seat 400 and surrounds the baffle 300. When the baffle 300 is in the closed state, the elastic ring 410 is in a circumferentially stretched or free state; when the baffle 300 is in the open state, the elastic ring 410 is in a circumferentially stretched state, so that the baffle 300 tightly fits the tube opening section 200 when closed, and the elastic ring 410 limits the movement of the baffle 300 when it is in the open state. For example, as shown... Figures 2-4 , Figure 6 , Figure 8 and Figure 9 As shown, the elastic ring 410 can be fitted onto the distal end of the baffle 300. In the free state, the elastic ring 410 contracts to the outside of the baffle 300, which is tightly attached to the tube opening section 200. When the baffle 300 is in the open state, the elastic ring 410 is stretched axially, and its elastic force to restore deformation acts on the baffle 300, which can limit the maximum opening angle of the baffle 300 to a certain extent. That is, it prevents the baffle 300 from opening too wide, so that the baffle 300 can not play its role in correcting the instrument's horizontal position relative to the optical axis a of the lens illumination assembly 500, or even cause the baffle 300 to bend and be damaged, thus causing damage to the patient's tissues.

[0086] In this embodiment, an elastic ring 410 is used for active pressure sealing. The elastic ring 410 (such as an O-ring or silicone ring) applies radial pressure to the baffle 300, forcing it to fit tightly against the edge of the tube opening 200 to form a reliable seal and prevent liquid backflow. When the instrument is removed, the rebound force of the elastic ring 410 helps to push the baffle 300 back to the closed position, improving the response speed and assisting in automatic reset. When the baffle 300 is pushed open by the instrument, the elastic ring 410 can limit its opening angle to prevent excessive deformation leading to fatigue fracture. The elastic ring 410 can absorb the small vibrations when the baffle 300 moves inside the body, reducing vibration and noise and improving overall stability.

[0087] In some embodiments, when the baffle 300 is open relative to the nozzle section 200, the elastic ring 410 forms a shielding surface 411 around the outlet channel 230. The elastic ring 410 extends from the proximal end to the distal end of the front end seat 400, and the degree of stretching gradually increases, as does the area of ​​the shielding surface 411. For example, as... Figure 2 , Figure 6 and Figure 8 As shown, the elastic ring 410 stretches and opens on both sides of the outlet channel 230 to form a shielding surface 411. The shielding surface 411 gradually increases in area from the proximal end to the distal end of the front end seat 400. The shielding surface 411 can limit and concentrate the flow of the device or fluid exiting the outlet channel 230.

[0088] In this embodiment, the shielding surface 411 formed by the elastic ring 410 after opening can prevent the instrument from getting stuck in the gaps on both sides of the outlet channel 230 after it exits the distal port 220 of the outlet section 200. Also, if the instrument exits from the gaps on both sides, the exit direction will be deviated, making it inconvenient to operate. When retrieving the instrument, it is also easy to get stuck in the small gap, causing damage to the front end component 10 and the instrument. When fluid is introduced, the shielding surface 411 can also prevent the fluid from exiting from the gaps on both sides due to pressure when the baffle 300 is switched from the closed state to the open state. This reduces the force of the fluid on the baffle 300, preventing the baffle 300 from opening completely and preventing the fluid from being dispersed and not being able to rinse or act on the designated position as intended by the operator.

[0089] In some embodiments, when the baffle 300 and the nozzle section 200 are integrally formed, the baffle 300 extends from the nozzle section 200 within the front end seat 400, and there is an assembly gap or height difference between the baffle 300 and the outer side of the nozzle section 200. When the baffle 300 and the front end seat 400 are integrally formed, in order to prevent interference between the proximal connection of the baffle 300 and the front end seat 400 when the baffle 300 rotates relative to the front end seat 400, a small gap also needs to be reserved. The elastic ring 410 is fitted at the junction of the baffle 300 and the nozzle section 200 to eliminate steps and gaps, thereby smoothing the junction of the baffle 300 and the nozzle section 200. For example, as shown... Figures 2-4 , Figure 6 , Figure 8 and Figure 9 As shown, the elastic ring 410 is fitted at the proximal end of the baffle 300 and does not cover the distal end of the baffle 300. Compared with the baffle 300 being fitted at the distal end, the deformation of the elastic ring 410 in the open state is smaller. Under the same elastic modulus, the elastic force that the elastic ring 410 can provide to the baffle 300 is also smaller.

[0090] In this embodiment, there is often an assembly gap or height difference at the junction of the baffle 300 and the pipe section 200. The elastic ring 410 can cover this area, eliminate the steps and gaps at the connection, and form a continuous smooth surface. The elastic ring 410 can also prevent mucous membranes or fibrous tissues from getting stuck in the gaps, prevent tissue embedding, and prevent damage or contamination. In addition, the elastic ring 410 can seal the gaps, improve fluid sealing, and further enhance the waterproof and leak-proof capabilities.

[0091] In some embodiments, the elastic ring 410 is sleeved at the junction of the baffle 300 and the pipe section 200 to smooth the junction of the baffle 300 and the pipe section 200; it also extends to the distal end of the baffle 300. For example, the elastic ring 410 covers the periphery of both the proximal and distal ends of the baffle 300 in the axial direction.

[0092] In this embodiment, the elastic ring 410 achieves a smooth, continuous transition throughout the circumference, which can better eliminate steps and gaps, prevent tissue, mucus, fibers, or cleaning brushes from getting stuck in the gaps, reduce the risk of infection and cleaning difficulty; improve the sealing level and prevent liquid backflow. The elastic ring 410 forms an extended sealing band in the axial direction, which is no longer a point contact or line contact, but a surface-level seal; the elastic ring 410 wraps the high-stress area of ​​the baffle 300, which plays a role in stress diffusion and buffering; and reduces the direct damage to the connection structure of the baffle 300 caused by external scratches and collisions.

[0093] Reference Figure 1 The embodiments of this application also provide a front-end component 10, which has the same technical features as the pipe structure provided in this application and can achieve the same technical effect, which will not be described in detail here.

[0094] Reference Figure 1 The embodiments of this application also provide an insertion part 20, which has the same technical features as the front-end component 10 provided in this application and can achieve the same technical effect, which will not be described in detail here.

[0095] Reference Figure 1 The embodiments of this application also provide an endoscope 40, which has the same technical features as the insertion part 20 provided in this application, and also includes a handle 30 connected to the insertion part 20, which can achieve the same technical effects as the technical features in the insertion part 20, and will not be described in detail here.

[0096] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0097] Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

[0098] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. An endoscope instrument tube outlet structure characterized by, The application relates to a lens illuminating device, which comprises: a front end seat (400) internally provided with a mounting area for mounting a lens illuminating assembly (500); a pipe mouth section (200) arranged at the distal end of an instrument pipe body (100) in the axial direction of the instrument pipe body (100), a proximal end (240) of the pipe mouth section (200) being used for connecting a distal end of the instrument pipe body (100) for receiving fluid and instruments from the instrument pipe body (100), a distal end (220) of the pipe mouth section (200) being connected to the circumferential side of the front end seat (400) to provide an outlet for fluid and instruments guided to the pipe mouth section (200); a baffle (300) having an open state and a closed state relative to the pipe mouth section (200), in the open state, a distal end of the baffle (300) is away from the distal end of the pipe mouth section (200), the angle between the axis of a first outlet channel (231) formed by the circumferential side of the front end seat (400) and the distal end of the baffle (300) and the axis of a second outlet channel (232) formed by the circumferential side of the front end seat (400) and the proximal end of the baffle (300) is smaller than the angle between the optical axis of the lens illuminating assembly (500) and the optical axis of the lens, so that the baffle (300) can be attached to the instrument to correct the deflection angle of the instrument; in the closed state, the baffle (300) is attached to the distal end (220) of the pipe mouth section (200); the thrust of the instrument or fluid in the pipe mouth section (200) switches the baffle (300) from the closed state to the open state.

2. The endoscope instrument tube exit structure according to claim 1, characterized by, The pipe mouth section (200) is arranged in the front end seat (400); the proximal end (240) of the pipe mouth section (200) at least partially overlaps the lens illuminating assembly (500) in the radial direction.

3. The endoscope instrument tube exit structure according to claim 1, characterized by, In the open state, the axis of the outlet channel (230) formed by the circumferential side of the front end seat (400) and the distal end of the baffle (300) is parallel to the optical axis of the lens illuminating assembly (500).

4. The endoscope instrument tube exit structure according to claim 1, characterized by, In the axial direction of the instrument pipe body (100), the baffle (300) comprises at least two baffle sections connected end to end, the distal end baffle section is bent towards the pipe mouth section (200), so that the angle between the axis of the first outlet channel (231) formed by the circumferential side of the front end seat (400) and the distal end baffle section and the optical axis of the lens assembly is smaller than the angle between the axis of the second outlet channel (232) formed by the circumferential side of the front end seat (400) and the proximal end baffle section and the optical axis of the lens assembly.

5. The endoscope instrument tube exit structure according to claim 1, characterized by, The baffle (300) comprises a first baffle section (310) and a second baffle section (320), the first baffle section (310) and the second baffle section (320) are attached to the circumferential extension of the pipe mouth section (200); In the closed state, the first baffle section (310) and the second baffle section (320) circumferentially contact the edge of the distal end (220) of the pipe mouth section (200) to shield the pipe mouth section (200).

6. The endoscope instrument tube exit structure according to claim 1, characterized by, The front end seat (400) is further provided with a stopper (210) at the distal end of the nozzle section (200), and the stopper (210) at least partially blocks the distal end of the stopper sheet (300) in the insertion direction of the endoscope in the closed state. The distal end and the peripheral side of the stopper sheet (300) are provided with rounded corners to smooth the front end outlet of the nozzle section (200) in the open state. The proximal end of the stopper (210) contacts the distal end of the stopper sheet (300). The stopper (210) is arranged on the front side of the direction of the nozzle section (200) to avoid being blocked by the stopper (210) when the instrument advances.

7. The endoscope instrument tube exit structure according to claim 1, characterized by, The proximal end of the stopper sheet (300) is connected to the instrument tube body (100) and is integrally formed with the distal end of the instrument tube body (100), or the proximal end of the stopper sheet (300) is connected to the nozzle section (200) and is integrally formed with the front end seat (400). The instrument tube outlet structure further comprises a resilient ring (410) which is sleeved on the outer periphery of the front end seat (400) and surrounds the stopper sheet (300) to tightly fit the stopper sheet (300) to the nozzle section (200) in the closed state and limit the stopper sheet (300) in the open state. The resilient ring (410) is sleeved on the intersection of the stopper sheet (300) and the nozzle section (200) to smooth the intersection of the stopper sheet (300) and the nozzle section (200).

8. A front end assembly characterized by, The endoscope comprises the endoscope instrument tube outlet structure according to any one of claims 1-7, and further comprises: A lens illumination assembly (500) arranged in a mounting area provided in the front end seat (400), and the lens optical axis direction of the lens illumination assembly (500) is parallel to the axial direction of the front end seat (400).

9. An insertion portion characterized by, The front end assembly according to claim 8 further comprises an axially butted curved tube and an insertion tube, and the front end assembly is connected to the distal end of the curved tube.

10. An endoscope characterized by comprising: The insertion part according to claim 9.

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