Endoscope insertion section head end and endoscope

Abstract

The application provides an endoscope insertion part head end and an endoscope, and relates to the technical field of medical equipment. The endoscope insertion part head end comprises a head end cover, the head end cover is provided with a mounting surface; an objective lens, the objective lens is mounted on the mounting surface of the head end cover; a nozzle, the nozzle is mounted on the mounting surface of the head end cover, the nozzle is provided with an internal flow channel, the nozzle is provided with a nozzle opening, the nozzle opening and the internal flow channel are communicated, the flow channel of the nozzle opening is configured as a diffusion section, the flow passage cross-sectional area of the diffusion section gradually increases along the fluid flow direction, and the objective lens is located in a diffusion angle coverage area defined by an extension line of the nozzle opening. Greater diffusion range can be obtained without increasing the volume of the nozzle, and the demand of covering a larger area objective lens is realized.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to an endoscope insertion tip and an endoscope. Background Technology

[0002] An endoscope is an important medical diagnostic and therapeutic instrument that acquires images of the body's cavities through its objective lens. During surgery or examinations, contaminants such as blood, mucus, and tissue debris can easily adhere to the objective lens, causing blurred vision and severely affecting the doctor's observation and operation. To ensure clear imaging, modern endoscopes typically integrate one or more nozzles at their distal end for spraying water (rinsing) and air (blowing) onto the objective lens. The water stream washes away contaminants from the lens surface, while the airflow disperses water droplets and dries the lens, thus restoring a clear view.

[0003] Currently, most existing endoscopic nozzles are cylindrical or conical straight-hole designs. This design results in a relatively concentrated water-air mixture stream, limiting its coverage area. For applications with small objective lens areas, this design is sufficient. However, with advancements in medical technology, the size of endoscopic objective lenses is continuously increasing to achieve a wider field of view or integrate more functions.

[0004] When the objective lens area is large, traditional nozzles, due to their concentrated jet, cannot effectively cover the entire lens surface, especially the edge areas. This results in contaminants in certain areas of the lens not being removed in time, forcing doctors to repeatedly rinse or remove the endoscope for wiping. This not only interrupts the surgical procedure and reduces efficiency but may also increase patient discomfort and surgical risks. Utility Model Content

[0005] Based on this, this application provides an endoscope insertion head and an endoscope, which can achieve a larger diffusion range and meet the need for a larger area objective lens.

[0006] This application provides an endoscope insertion tip, including:

[0007] Head cover, the head cover is provided with a mounting surface;

[0008] Objective lens, mounted on the mounting surface of the head cap;

[0009] The nozzle is mounted on the mounting surface of the head cover. The nozzle has an internal flow channel and an orifice. The orifice and the internal flow channel are connected. The flow channel of the orifice is constructed as a diffuser section, and its flow cross-sectional area gradually increases along the direction of fluid flow. The objective lens is located within the diffusion angle coverage area defined by the extension line of the orifice.

[0010] The endoscope insertion head end according to the embodiment of this application has at least the following beneficial effects: by constructing the flow channel where the nozzle is located as a diffusion section, a larger diffusion range can be obtained without increasing the nozzle volume compared to the conventional cylindrical nozzle, thereby meeting the requirement of covering a larger area of ​​objective lens.

[0011] According to some embodiments of this application, the internal flow channel includes a contraction section, a narrow throat section, and a diffusion section connected sequentially along the fluid flow direction. The flow cross-sectional area of ​​the contraction section decreases from large to small, and the flow cross-sectional area of ​​the narrow throat section is the smallest.

[0012] In this embodiment, the internal flow channel, through its structure of a constriction section, a narrow throat section, and a diffuser section, reduces fluid turbulence and energy loss, resulting in smoother fluid ejection and superior spray distance and coverage under the same inlet pressure and flow rate. Due to the higher spray efficiency, achieving the same cleaning effect requires only a shorter spray time or a lower fluid flow rate, reducing operation time, improving surgical efficiency, and minimizing the impact on the patient.

[0013] According to some embodiments of this application, the axis of the nozzle forms a preset angle α with the mounting surface of the head cover.

[0014] In this embodiment, by using a preset tilt angle α, the diffused fluid's central region can precisely cover the central region of the objective lens. This is the core area of ​​the field of view and the part that most needs to be kept clean, thus maximizing rinsing efficiency. Because the fluid can act more precisely on the target area, waste from spraying onto non-target areas is reduced, allowing the same cleaning effect to be achieved with less water. Simultaneously, unnecessary impact of the water flow on non-target tissues is reduced, avoiding the risk of tissue damage or liquid accumulation that might occur with direct spraying, thus improving operational safety.

[0015] According to some embodiments of this application, the tilt angle α is 170° to 176°.

[0016] According to some embodiments of this application, the longitudinal cross-sectional profile of the diffusion section is straight, curved, or a combination thereof.

[0017] In this embodiment, the longitudinal cross-sectional profile of the diffuser section is straight, curved, or a combination thereof, which can guide the high-speed fluid to decelerate smoothly, effectively convert its kinetic energy into pressure energy, and minimize flow separation and energy loss.

[0018] According to some embodiments of this application, the longitudinal cross-sectional profile of the diffuser section is straight, making the flow channel of the diffuser section truncated cone-shaped.

[0019] In this embodiment, the conical shape is one of the basic mechanical structures, which can easily ensure the high consistency of the dimensions of a large batch of products and guarantee the stable performance of each nozzle. Engineers can easily optimize performance by adjusting the cone angle and length, finding the optimal balance between diffusion effect, flow channel length, and pressure loss.

[0020] According to some embodiments of this application, a drainage groove is provided on the mounting surface of the head cover, and the drainage groove is arranged along the periphery of the objective lens.

[0021] In this embodiment, the primary function of the drainage channel is to collect waste fluid, preventing it from overflowing and contaminating other components or flowing directly into the patient's body. Promptly draining turbid waste fluid containing blood, mucus, and tissue fragments prevents it from accumulating in front of the objective lens or re-contaminating the freshly rinsed lens surface, thus ensuring a continuously clear field of view without the need for repeated rinsing by the doctor.

[0022] According to some embodiments of this application, an illumination lens is also provided on the mounting surface of the head cover.

[0023] In this embodiment, by setting up an illumination lens, the light from the illumination lens is directed out and illuminated into the body cavity, providing sufficient and uniform illumination for the imaging of the objective lens.

[0024] According to some embodiments of this application, an instrument channel is also provided on the mounting surface of the head cover.

[0025] In this embodiment, the surgeon can insert surgical instruments through the instrument channel and perform surgical procedures under direct vision. This simplifies the preoperative preparation process, reduces the risk of errors, air leaks, water leaks, or contamination that may result from multiple connections, and improves the efficiency of the operating room. The surgeon can directly operate the flushing button without removing the instruments to wash away blood, immediately restoring a clear view, assessing treatment effectiveness, or proceeding to the next step. This synergistic effect effectively improves the smoothness and safety of the surgery.

[0026] According to some embodiments of this application, the mounting surface of the head cover is also provided with an auxiliary water inlet for introducing jet fluid to rinse human tissue.

[0027] In this embodiment, the auxiliary water inlet can be connected to external flushing water to disperse bloodstains, expose the wound, assist in tissue dissection, or assist in hemostasis.

[0028] This application also discloses an endoscope, including the aforementioned endoscope insertion head.

[0029] In addition to the technical problems solved by the embodiments of this application, the technical features constituting the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions described above, other technical problems that can be solved by the endoscope insertion head end and the endoscope provided by this application, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further explained in detail in the specific embodiments. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this application 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 some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 A plan view of the tip of the endoscope insertion section provided in an embodiment of this application;

[0032] Figure 2 A side view of the tip of the endoscope insertion section provided in an embodiment of this application;

[0033] Figure 3 A cross-sectional view of the tip of the endoscope insertion section provided in an embodiment of this application;

[0034] Figure 4 This is a schematic diagram of the nozzle structure provided in an embodiment of this application;

[0035] Figure 5 for Figure 4 A cross-sectional view along the AA direction;

[0036] Figure 6 for Figure 4 A cross-sectional view along the BB direction.

[0037] Explanation of reference numerals in the attached figures:

[0038] 100 - Head cover; 110 - Drainage channel;

[0039] 200-Objective lens;

[0040] 300 - Nozzle; 310 - Internal flow channel; 311 - Contraction section; 312 - Narrow throat section; 313 - Diffusion section; 320 - Nozzle;

[0041] 400 - Illumination lens; 500 - Instrument channel; 600 - Auxiliary water inlet. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0043] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0044] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0045] The terms "first," "second," and "third" (if any) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein.

[0046] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such that a process, method, system, product, or display that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or display.

[0047] refer to Figures 1 to 3 As shown, this application discloses an endoscope insertion tip, comprising:

[0048] The head cover 100 has a mounting surface;

[0049] Objective lens 200, which is mounted on the mounting surface of head cover 100;

[0050] Nozzle 300 is mounted on the mounting surface of head cover 100. Nozzle 300 has an internal flow channel 310 and a nozzle 320. Nozzle 320 is connected to internal flow channel 310. The flow channel of nozzle 320 is constructed as a diffuser section 313, and its flow cross-sectional area gradually increases along the fluid flow direction. Objective lens 200 is located within the diffusion angle coverage area defined by the extension line of nozzle 320.

[0051] In this embodiment, by constructing the flow channel where the nozzle 320 of the nozzle 300 is located as a diffuser section 313, the fluid ejected from the nozzle 320 is diffused, and the objective lens 200 is located within the diffusion angle coverage area defined by the extension line of the nozzle 320.

[0052] By constructing the flow channel where the nozzle 320 is located as a diffuser section 313, a larger diffusion range can be obtained without increasing the volume of the nozzle 300 compared to the conventional cylindrical nozzle, thereby meeting the requirement of covering a larger area of ​​the objective lens 200.

[0053] refer to Figure 4 and Figure 5 As shown, in some embodiments of this application, the internal flow channel 310 includes a contraction section 311, a narrow throat section 312 and a diffusion section 313 connected sequentially along the fluid flow direction. The flow cross-sectional area of ​​the contraction section 311 decreases from large to small, and the flow cross-sectional area of ​​the narrow throat section 312 is the smallest.

[0054] Since the flow channel structure where the nozzle 320 is located is the diffuser section 313, the ejected flow velocity will decrease. Under the condition that other conditions remain unchanged, in order to ensure its flow velocity, it is necessary to increase the fluid inlet pressure, which requires changing the water supply equipment and increasing costs.

[0055] In this embodiment, the internal flow channel 310 is sequentially connected along the fluid flow direction, consisting of a contraction section 311, a narrow throat section 312, and a diffuser section 313. In the contraction section 311, the cross-sectional area of ​​the flow channel gradually decreases, and the fluid velocity increases. At the narrow throat section 312, the high-speed fluid possesses high kinetic energy, providing a basis for subsequent diffusion. In the diffuser section 313, the deceleration and pressure recovery process of the fluid is not a smooth linear process. The fluid naturally diffuses outwards along the wall shape of the diffuser section, thus covering an increasingly larger cross-sectional area. A smoothly designed diffuser section 313 ensures smooth fluid diffusion, avoiding turbulence or vortices that could lead to energy loss.

[0056] In summary, the internal flow channel, through its constriction section 311, narrow throat section 312, and diffuser section 313, reduces fluid turbulence and energy loss, resulting in smoother fluid ejection and superior spray distance and coverage under the same inlet pressure and flow rate. Due to the higher spray efficiency, achieving the same cleaning effect may require only a shorter spray time or a lower fluid flow rate, reducing operation time, improving surgical efficiency, and minimizing the impact on the patient.

[0057] refer to Figure 3 , Figure 4 and Figure 6 As shown, in some embodiments of this application, the axis of the nozzle 320 forms a preset tilt angle α with the mounting surface of the head cover 100.

[0058] In this embodiment, the axis of the nozzle 320 refers to the central axis of symmetry of the internal flow channel 310 of the nozzle 300, especially the center line of its diffuser section 313, which defines the main direction of fluid ejection.

[0059] The axis of the nozzle 320 is not spatially parallel to the mounting surface of the headpiece shroud 100. The axis of the nozzle 320 and the mounting surface of the headpiece shroud 100 form a fixed, pre-calculated, and designed angle, known as the preset tilt angle α. This preset tilt angle α ensures that the objective lens 200 is located within the diffusion angle coverage area defined by the extension line of the nozzle 320. The tilt angle α can be achieved by directly machining the mounting channel or seat of the nozzle 300 into an angled hole with a specific angle during the design and manufacture of the endoscope insertion headpiece.

[0060] The above design ensures that the diffused fluid's central area precisely covers the central area of ​​the objective lens 200. This is the core area of ​​the field of view and the part that most needs to be kept clean, thus maximizing rinsing efficiency. Because the fluid acts more precisely on the target area, waste from spraying onto non-target areas is reduced, allowing for the same cleaning effect with less water. Simultaneously, it reduces unnecessary impact of water flow on non-target tissues, avoiding the risk of tissue damage or liquid accumulation that might occur with direct spraying, thus improving operational safety.

[0061] Please see Figure 3 As shown, in some embodiments of this application, the tilt angle α is 170° to 176°.

[0062] The tilt angle α can be 170°, 171°, 172.5°, 173°, 174°, 175°, 176°, etc., and is not limited in this application. Setting the tilt angle α to 170° to 176° helps to ensure that the diffused fluid center area can cover the mirror center area of ​​the objective lens 200, reducing unnecessary impact of water flow on non-target tissues, avoiding the risk of tissue damage or liquid accumulation that may be caused by direct injection design, and improving operational safety.

[0063] In some embodiments of this application, the longitudinal cross-sectional profile of the diffusion section 313 is straight, curved, or a combination thereof.

[0064] In this embodiment, "straight line" refers to the inner wall of the diffuser section being a straight diagonal line. This makes the entire diffuser section form a frustum-shaped cavity. "Curved line" refers to the inner wall of the diffuser section being a smooth curve. This curve can be convex outward, concave inward, or a more complex composite curve. A combination of these refers to the diffuser section 313 being a smooth connection between a straight line and a curve. For example, the inlet section uses a straight line for rapid expansion, while the outlet section uses a curve to optimize the flow field; or vice versa.

[0065] The above design guides the high-speed fluid to decelerate smoothly, effectively converting its kinetic energy into pressure energy, and minimizing flow separation and energy loss.

[0066] Among them, the right-angled structure is simple, and the flow is also relatively simple. The fluid moves along the straight wall, and due to the increase in cross-sectional area, the flow velocity decreases linearly, while the pressure recovers linearly. The straight diffuser section requires a cone angle range to balance the diffusion effect and structural dimensions, and the cone angle is preferably 15-45°.

[0067] Curved flow patterns offer optimal hydrodynamic performance and the highest energy conversion efficiency, enabling a more uniform and stable outlet flow field. They also allow for larger diffusion angles over shorter lengths, facilitating miniaturization.

[0068] Combination designs offer greater flexibility, allowing for a balance between performance and cost.

[0069] In some embodiments of this application, the longitudinal cross-sectional profile of the diffuser section 313 is straight, making the flow channel of the diffuser section 313 shaped like a frustum conical.

[0070] In this embodiment, the diffuser section 313 of the nozzle 320 is a hollow, frustum-shaped cavity. Fluid flows in from the end with the smaller cross-section and flows out from the end with the larger cross-section. The straight conical wall acts as a guide and constraint for the fluid. Fluid particles move closely against the inclined wall. Because the wall expands outward in a straight line, the flow direction of the fluid is also guided outward. Finally, when the fluid leaves the outlet, its flow direction is no longer a single axial direction, but forms a conical fan centered on the nozzle axis, achieving fluid diffusion.

[0071] The conical shape is one of the most basic mechanical structures, and its machining technology is very mature. Whether using drilling or molds, it is easy to ensure high dimensional consistency in large batches of products, guaranteeing stable performance for each nozzle. Engineers can easily optimize performance by adjusting the cone angle and length, finding the optimal balance between diffusion effect, flow channel length, and pressure loss.

[0072] refer to Figure 1 As shown, in some embodiments of this application, a drainage groove 110 is provided on the mounting surface of the head cover 100, and the drainage groove 110 is arranged around the periphery of the objective lens 200.

[0073] In this embodiment, the objective lens 200 is disposed inside the drainage trough 110. Specifically, the lens of the objective lens 200 can be mounted on the bottom of the drainage trough 110 or on the side wall of the drainage trough 110, but its surface must be within the space enclosed by the drainage trough 110. The liquid sprayed from the nozzle 320 and used to rinse the surface of the objective lens 200 will flow downwards from the surface of the objective lens 200 under the influence of gravity, inertia, and the impact of subsequent fluids. The primary function of the drainage trough 110 is to collect this waste liquid, preventing it from spreading and contaminating other components or flowing directly into the patient's body. The timely and rapid removal of turbid waste liquid containing blood, mucus, and tissue fragments prevents it from accumulating in front of the objective lens or re-contaminating the freshly rinsed surface, thus ensuring a continuously clear field of vision without the need for repeated rinsing by the doctor.

[0074] refer to Figure 1 As shown, in some embodiments of this application, an illumination lens 400 is also provided on the mounting surface of the head cover 100.

[0075] In this embodiment, by setting up an illumination lens 400, the light from the illumination lens 400 is directed out and illuminated into the body cavity, providing sufficient and uniform illumination for the imaging of the objective lens 200.

[0076] refer to Figure 1 As shown, in some embodiments of this application, the mounting surface of the head cover 100 is also provided with an instrument channel 500.

[0077] In this embodiment, the instrument channel 500 is a physical interface located on the mounting surface of the headpiece shroud 100. One end of it connects to the instrument channel inside the endoscope via a conduit, while the other end connects to the outside, serving to guide surgical instruments into the instrument channel in a sealed manner. Through the instrument channel 500, the surgeon can insert dozens of surgical instruments, such as biopsy forceps, snares, injection needles, and hemostatic clips, to perform complex operations such as tissue sampling, polyp removal, hemostasis, and suturing under direct vision. This simplifies the preoperative preparation process, reduces the risk of errors, air leaks, water leaks, or contamination that may result from multiple connections, and improves the efficiency of the operating room. The surgeon can directly operate the flushing button to wash away blood without removing the instruments or immediately after removal, instantly restoring a clear field of vision to assess treatment effectiveness or continue to the next step. This synergistic effect effectively improves the smoothness and safety of the surgery.

[0078] refer to Figure 1 As shown, the mounting surface of the head cover 100 is also provided with an auxiliary water inlet 600 for introducing jet fluid to rinse human tissue.

[0079] In this embodiment, the auxiliary water inlet 600 is another fluid interface disposed on the mounting surface of the head cover 100. The auxiliary water inlet 600 is connected to a separate internal pipe, and the outlet direction of the auxiliary water inlet 600 points directly towards the human tissue, rather than towards the objective lens 200. It is used to wash away bloodstains, expose wounds, assist in tissue dissection, or assist in hemostasis.

[0080] This application also discloses an endoscope, including the aforementioned endoscope insertion head.

[0081] Since the endoscope of this application adopts all the technical solutions of the endoscope insertion head end of the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be repeated here.

[0082] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An endoscope insertion tip, characterized in that, include: A head cover (100) is provided with a mounting surface; Objective lens (200), said objective lens (200) is mounted on the mounting surface of said head cover (100); A nozzle (300) is mounted on the mounting surface of the head cover (100). The nozzle (300) has an internal flow channel (310) and an orifice (320) that communicates with the internal flow channel (310). The flow channel of the orifice (320) is configured as a diffuser section (313) whose flow cross-sectional area gradually increases along the fluid flow direction. The objective lens (200) is located within the diffusion angle coverage area defined by the extension line of the orifice (320).

2. The endoscope insertion tip according to claim 1, characterized in that: The internal flow channel (310) includes a contraction section (311), a narrow throat section (312), and a diffusion section (313) connected sequentially along the fluid flow direction. The flow cross-sectional area of ​​the contraction section (311) decreases from large to small, and the flow cross-sectional area of ​​the narrow throat section (312) is the smallest.

3. The endoscope insertion tip according to any one of claims 1-2, characterized in that: The axis of the nozzle (320) forms a preset tilt angle α with the mirror surface of the objective lens (200).

4. The endoscope insertion tip according to claim 3, characterized in that: The tilt angle α is 170° to 176°.

5. The endoscope insertion tip according to any one of claims 1-2, characterized in that: The longitudinal profile of the diffusion section (313) is straight, curved, or a combination thereof.

6. The endoscope insertion tip according to claim 5, characterized in that: The longitudinal section profile of the diffuser section (313) is straight, making the flow channel of the diffuser section (313) truncated cone-shaped.

7. The endoscope insertion tip according to any one of claims 1-2, characterized in that: The head cover (100) has a drainage groove (110) on its mounting surface, and the drainage groove (110) is arranged around the periphery of the objective lens (200).

8. The endoscope insertion tip according to any one of claims 1-2, characterized in that: The head cover (100) is also provided with an illumination lens (400) and / or an instrument channel (500) on its mounting surface.

9. The endoscope insertion tip according to any one of claims 1-2, characterized in that: The head cover (100) is also provided with an auxiliary water inlet (600) on its mounting surface for introducing jet fluid.

10. An endoscope, characterized in that, Includes the endoscope insertion tip as described in any one of claims 1-9.

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