Tip structure, forming method of tip structure and endoscope
By designing the light guide beam into divergent shape in the apex structure of the fiber endoscope, the problem of small lighting range of the fiber endoscope is solved, and a larger range and uniform lighting is achieved, which improves image quality.
Patent Information
- Application Number
- CN202510838327.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-23
- Publication Date
- 2025-08-05
AI Technical Summary
The existing fiber endoscopes have a small exit angle at the apex, resulting in a small illumination range, which affects the image quality acquired by the camera assembly.
A tip structure is designed, including an end housing and a light guide beam. The light guide beam is divergent at the outlet end of the light guide channel. By stripping the outer skin of the light guide beam, the light guide wire is tilted and dispersed and positioned using a dispersed tool, trimmed to level, and increasing the exit angle and divergence range of the light.
The lighting range is significantly expanded, the lighting conditions of the camera components are improved, and the image quality is ensured.
Smart Images
Figure CN120428419A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of endoscopes, and in particular to a tip structure, a method for forming the tip structure, and an endoscope. Background Art
[0002] A fiber optic endoscope is an endoscope that uses an optical fiber bundle to transmit light. The optical fiber bundle is installed inside the endoscope, with both ends respectively located on the tip of the endoscope and the light guide plug. When the endoscope is connected to a light source through the light guide plug, the light emitted by the light source can be transmitted into the optical fiber bundle and propagate within the optical fiber bundle. Finally, the light is transmitted from the end of the optical fiber located at the tip to provide illumination for the endoscope.
[0003] At present, the optical fiber bundle is always in a bundled state inside the endoscope, that is, the optical fiber bundle has the same diameter from the end close to the light guide plug to the end of the tip (such as Figure 6 ), the light emitted from the optical fiber bundle at the tip has a small angle of incidence and a small divergence range of the light, resulting in a small illumination range, which affects the image acquisition by the endoscope camera component and causes poor image quality of the image acquired by the camera component. Summary of the Invention
[0004] The present invention provides a tip structure and an endoscope, which can solve the problem of poor image quality obtained by a camera assembly caused by a small illumination range of an existing optical fiber endoscope.
[0005] The invention provides a method for forming an apex structure, which is used for forming the apex structure.
[0006] The embodiments of the present invention can be implemented as follows:
[0007] An embodiment of the present invention provides a tip structure, which includes:
[0008] An end shell is provided with a light guide channel;
[0009] The light guide is accommodated in the light guide channel and extends to the exit end of the light guide channel, and the end of the light guide is divergent at the exit end of the light guide channel.
[0010] Optionally, the light guiding channel includes an expansion cavity and a convergence cavity, the expansion cavity is connected to the convergence cavity, and the end of the light guiding beam is accommodated in the expansion cavity;
[0011] The inner diameter of the expansion cavity gradually expands, the large diameter end of the expansion cavity is located on the exit end side of the light guide channel, and the small diameter end of the expansion cavity is connected to the focusing cavity.
[0012] Optionally, the expansion cavity is a conical cavity, and the end surface of the expansion cavity is circular;
[0013] The light guide comprises a plurality of light guide filaments, which are closely attached to the cavity wall of the conical cavity and evenly distributed along the cavity wall of the conical cavity.
[0014] Optionally, the end face shape of the expansion cavity is any one of circular, semicircular, elliptical, rectangular, and heart-shaped.
[0015] Optionally, the light guide diverges to form a cavity, the cavity is located in the middle of the light guide, and a filling body is arranged in the cavity.
[0016] Optionally, the light guide in the expansion cavity and the light guide in the convergence cavity form an angle β, 2°≤β≤30°.
[0017] Optionally, a guiding groove is provided on the inner wall of the expansion cavity, and at least a portion of the guiding light beam is accommodated in the guiding groove.
[0018] An embodiment of the present invention further provides a method for forming a tip structure, which is used to form the tip structure, comprising:
[0019] Stripping off the outer covering of the light guide beam on one side of the light guide channel outlet end, so that all the light guide filaments of the light guide beam are exposed;
[0020] Use a dispersion tool to insert from the end of the light guide wire, so that the light guide wire is inclined and dispersed toward the cavity wall of the expansion cavity, and the position of the dispersed light guide wire is positioned;
[0021] Trim the scattered light guide wires so that the light guide wires are flush with the end face of the light guide channel.
[0022] Optionally, the obliquely dispersed light guide filaments are bonded to the inner wall of the light guide channel.
[0023] An embodiment of the present invention further provides an endoscope comprising the aforementioned tip structure.
[0024] Beneficial effects of the embodiments of the present invention:
[0025] The tip structure includes an end shell and a light guide. The end shell is provided with a light guide channel. The light guide is accommodated in the light guide channel and extends to the exit end of the light guide channel. The end of the light guide is divergent at the exit end of the light guide channel to increase the light emission angle, increase the light divergence range, and expand the illumination range. At the same time, the divergence of the light guide at the exit end also increases the emission area of the light exit end, further increasing the illumination range, which is beneficial to provide sufficient lighting conditions for the camera component of the endoscope and ensure that the acquired image quality is better.
[0026] The method for forming the tip structure includes: removing the outer covering of the light guide light bundle on one side of the light guide channel outlet, exposing all the light guide filaments; inserting a dispersion tool from the end of the light guide light bundle to tilt and disperse the light guide filaments in all directions, and positioning the dispersed light guide filaments; and trimming the dispersed light guide filaments to align them with the end surface of the light guide channel. This molding method can quickly produce a tip structure with a wide illumination range, thereby improving the brightness of the camera environment of the endoscope camera assembly.
[0027] The endoscope includes a tip structure, which has all the functions of the tip structure. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.
[0029] Figure 1 A schematic structural diagram of a tip structure provided in an embodiment of the present invention;
[0030] Figure 2 A schematic diagram of the process of forming the tip structure provided in an embodiment of the present invention;
[0031] Figure 3 This is a schematic diagram of an embodiment of the present invention in which the end face of the expansion cavity is circular;
[0032] Figure 4 A schematic diagram showing that the end surface of the expansion cavity provided in an embodiment of the present invention is semicircular;
[0033] Figure 5 This is a schematic diagram of an embodiment of the present invention in which the end face of the expansion cavity is rectangular;
[0034] Figure 6 Schematic diagram of the layout of existing light guide beams.
[0035] Icons: 1-end shell; 10-light guide channel; 101-expansion cavity; 102-focusing cavity; 2-light guide beam; 20-light guide wire; 201-cavity; 3-filling body; 4-dispersion tooling; 5-operation channel; 6-camera assembly. DETAILED DESCRIPTION
[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.
[0037] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are intended to fall within the scope of protection of the present invention.
[0038] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.
[0039] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the invention is usually placed when in use. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.
[0040] In addition, the terms "first", "second", etc., if used, are merely used to distinguish and describe, and should not be understood as indicating or implying relative importance.
[0041] The terms "comprises," "comprising," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.
[0042] Unless otherwise expressly specified or limited, terms such as "disposed" and "connected" should be interpreted broadly. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.
[0043] It should be noted that for the aforementioned various method embodiments, for simplicity of description, they are all expressed as a series of action combinations, but those skilled in the art should be aware that this application is not limited by the order of the actions described, because according to this application, some steps can be performed in other orders or simultaneously. The steps in the method embodiments of this application can be adjusted in order, combined, or deleted according to actual needs.
[0044] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.
[0045] A fiber optic endoscope is an endoscope that uses an optical fiber bundle to transmit light for illumination. The optical fiber bundle is arranged along the insertion part of the endoscope, with both ends fixed to the tip and the light guide plug respectively. When the endoscope is connected to the light source through the light guide plug, the light emitted by the light source can be transmitted into the optical fiber bundle and propagated within the optical fiber bundle. Finally, the light is transmitted from the end of the optical fiber located at the tip to provide illumination for the endoscope operation.
[0046] An optical fiber bundle is a collection of multiple optical fibers arranged in a specific manner. Each optical fiber can transmit an optical signal independently, thus realizing the parallel transmission of multiple optical signals. At present, the optical fiber bundle arranged inside the endoscope is in a bundled state from the light guide plug to the tip end. That is, the optical fiber bundle has the same diameter from one end of the light guide plug to the other end of the tip end (e.g. Figure 6 ), the light emitted from the optical fiber bundle at the tip has a small angle of incidence, generally less than 120°. Therefore, the light divergence range is small, resulting in a small illumination range. Furthermore, the light brightness at the edge of the illumination range is darker than that in the center, resulting in uneven light emission, which affects the image capture by the endoscope's camera assembly. Related technologies have proposed adding an objective lens assembly to the end of the optical fiber bundle. Light passing through the objective lens assembly before exiting will increase the illumination range. However, the objective lens assembly is expensive, difficult to connect and install with the existing tip, and requires space at the tip, which conflicts with the design requirements of a large channel and small size for the tip.
[0047] In view of this, an embodiment of the present invention provides a tip head structure, a molding method of the tip head structure and an endoscope. The tip head structure and the endoscope using the tip head structure can solve the above-mentioned problems existing in existing endoscopes. The molding method of the tip head structure is used to manufacture and mold the tip head structure, which will be described in detail below.
[0048] Please refer to Figure 1 and Figure 2 The tip structure includes an end shell 1 and a light guide 2. The end shell 1 is provided with a light guide channel 10. The light guide 2 is accommodated in the light guide channel 10 and extends to the exit end of the light guide channel 10. The end of the light guide 2 is divergent at the exit end of the light guide channel 10. The other end of the light guide 2 extends to the light guide plug. When the light guide plug is connected to the light source device, the light generated by the light source device is transmitted to the exit end of the light guide channel 10 through the light guide 2. The divergent light guide 2 increases the exit angle of the exiting light, thereby expanding the illumination range; at the same time, compared with the convergent light guide 2, the divergent light guide 2 has a larger end face area, which increases the light exit area and further increases the illumination range, thereby providing more uniform and sufficient illumination light for the camera component 6 of the endoscope.
[0049] It should be noted that the light guide beam 2 is formed by a bundle of multiple light guide filaments 20, and each light guide filament 20 is made of optical fiber material with high light transmittance.
[0050] The end housing 1 can be made of medical-grade stainless steel or high-strength plastic to ensure excellent biocompatibility and mechanical strength. A light guide channel 10 is arranged along the axial direction of the end housing 1. Both ends of the light guide channel 10 extend through the end surfaces of the end housing 1. One end of the end housing 1 connects to the insertion tube of the endoscope, thereby extending the light guide light 2 in the insertion tube into the light guide channel 10.
[0051] The light-guiding channel 10 includes an expansion cavity 101 and a focusing cavity 102. The expansion cavity 101 is connected to the focusing cavity 102, and one end of the light-guiding beam 2 is accommodated in the expansion cavity 101. The inner diameter of the expansion cavity 101 gradually expands, and the large diameter end of the expansion cavity 101 is located on the side of the exit end of the light-guiding channel 10, and the small diameter end of the expansion cavity 101 is connected to the focusing cavity 102, and the inner walls are smoothly connected. The focusing cavity 102 is used to fix the non-divergent part of the light-guiding beam 2 to avoid relative movement or shaking between the light-guiding beam 2 and the end shell 1, which affects the transmission of light; the expansion cavity 101 is used to position and fix the divergent part of the light-guiding beam 2. The expansion cavity 101 makes the light-guiding filaments 20 of the light-guiding beam 2 distributed at a certain tilt angle. The tilted light-guiding filaments 20 can emit light at a tilted angle, thereby increasing the range of illumination and avoiding the emitted light from being concentrated together, making the light distribution more uniform.
[0052] The end face shape of the expansion cavity 101 can be designed according to actual needs, for example, it can be designed to be circular, semicircular, elliptical, rectangular, heart-shaped or irregular in shape to adapt to special usage scenarios. Figure 3 In this embodiment, the end face of the expansion cavity 101 is circular, and the expansion cavity 101 is a conical cavity as a whole. The expansion cavity 101 is described below using the conical cavity as an example. Of course, in other embodiments, the end face of the expansion cavity 101 can also be as follows: Figure 4 The semicircle shown or Figure 5 The rectangle shown here is not limited.
[0053] Light guide 2 includes multiple light filaments 20. Therefore, the multiple light filaments 20 of light guide 2 can be dispersed first and then evenly attached to the conical cavity wall, so that the multiple light filaments 20 are evenly distributed along the conical cavity wall. Because the light filaments 20 at the ends of light guide 2 are tilted and fixed toward the conical cavity wall, a cavity 201 is formed in the middle of the end of light guide 2. This cavity 201 is also conical and compatible with the conical expansion cavity 101.
[0054] In order to prevent the inclined light guide filament 20 from rebounding toward the middle of the light guide beam 2, and to better uniformly emit the light emitted by the light guide filament 20, a filler 3 is filled in the cavity 201. The filler 3, on the one hand, presses the inclined light guide filament 20 against the wall of the expansion cavity 101, thereby positioning and fixing the light guide filament 20. On the other hand, the light emitted by the light guide filament 20 after passing through the cavity 201 is refracted by the filler 3 and then emitted from the end face of the filler 3, making the emitted light more uniform. The filler 3 is a transparent or translucent body. The filler 3 can be a solidified body formed by glue, or it can be silicone, resin, or other materials. The material of the filler 3 is not limited. The filler 3 cooperates with the diverging light guide filament 20 to make the emitted light more uniform.
[0055] Of course, the distribution density of the light guide wires 20 in the conical cavity can be adjusted according to the lighting requirements. For example, if a high-brightness environment is required on one side, the light guide wires 20 are arranged at a high density on that side.
[0056] The light guide wire 20 is tilted and distributed in the conical expansion cavity 101, and its tilt angle forms an angle β with the original angle of the light guide beam 2. Usually, 2°≤β≤30°, such as β is 2°, 5°, 8°, 10°, 12°, 15°, 18°, 20°, 30°, etc. If the angle β is too small, the divergence range of the illumination light is limited. If the angle β is too large, the light will be too dispersed and the illumination intensity within the illumination range will be insufficient. Arranging the light guide wire 20 within this angle range can ensure both sufficient illumination intensity and a sufficiently large illumination range. In addition, the brightness difference between the edge area and the center area of the illumination range is small, thereby providing a uniform illumination environment for the camera assembly 6 of the endoscope.
[0057] Optionally, a guide groove can also be provided on the inner wall of the expansion cavity 101, and part of the light guide filament 20 is embedded in the guide groove, and the light guide filament 20 is diverged in a specified direction through the guide groove. The guide groove can also fix the light guide filament 20 to prevent the light guide filament 20 from shifting during operation. The guide groove can be arranged in a straight line along the conical surface of the conical expansion cavity 101, or can be arranged in a spiral along the conical surface of the conical expansion cavity 101, or can be arranged in other forms along the conical surface of the conical expansion cavity 101. The guide groove can be any one of a trapezoidal groove, a rectangular groove, a semicircular groove, an elliptical groove, etc., which is not limited here. The depth and width of the guide groove need to match the diameter of the light guide filament 20 to ensure that the light guide filament 20 can fit tightly against the cavity wall.
[0058] It is worth mentioning that the end shell 1 described in the embodiment of the present invention is the same component as the front end of the endoscope. Therefore, the end shell 1 in the embodiment of the present invention is also provided with an operating channel 5 and a camera channel. The operating channel 5 is used to arrange operating components, such as clamping forceps and sampling spoons, and the camera channel is used to arrange a camera component 6, through which the tissue in the patient's body cavity is photographed.
[0059] The tip structure of the embodiment of the present invention significantly expands the illumination range by diverging the end of the light guide 2, ensures the uniformity of the illumination light, and provides a better lighting environment for the camera assembly 6.
[0060] refer to Figure 2 The embodiment of the present invention further provides a method for forming a tip head structure, the method for forming the tip head structure described above, comprising the following steps:
[0061] S1: peeling off the outer covering of the light guide beam 2 at one side of the exit end of the light guide channel 10 to expose all the light guide filaments 20 of the light guide beam 2; be careful when peeling off the outer covering to avoid damaging the light guide filaments 20.
[0062] S2: Use a dispersing tool 4 to insert from the end of the light guide 2 to disperse the light guide filaments 20 obliquely toward the cavity wall of the expansion cavity 101 , and position the dispersed light guide filaments 20 .
[0063] S3: trimming the scattered light guide filaments 20 so that the ends of the light guide filaments 20 are flush with the end surface of the light guide channel 10 .
[0064] It should be understood that prior to step S1, the light guide channel 10 of the end housing 1 needs to be cut to form the end section of the light guide channel 10 into an expansion cavity 101 with a gradually increasing inner diameter. During cutting, it is necessary to ensure that the cutting angle is consistent with the preset angle and that the cutting is uniform and smooth. Of course, the end housing 1 can also be pre-molded in one piece in the factory according to the design. The one-piece end housing 1 has a standard expansion cavity 101 and a convergence cavity 102.
[0065] In order to enable the dispersing tool 4 to squeeze the light guide filaments 20 and distribute them obliquely on the cavity wall of the expansion cavity 101 and fix them, step S1.1 may be added before step S2.
[0066] S1.1: Apply glue to the walls of expansion cavity 101 and / or to the light guide filament 20 after the outer skin has been peeled. When light guide filament 20 is tilted and in contact with the wall of expansion cavity 101, it can be glued and fixed. Before the glue solidifies, the dispersing tool 4 always presses the light guide filament 20 to prevent it from rebounding and returning to its original position. The glue used to bond light guide filament 20 to the wall of expansion cavity 101 must have high bonding strength, high and low temperature resistance, corrosion resistance, and moisture and water resistance. Of course, AB glue can also be used to bond the cavity wall of the expansion cavity 101 and the light guide filament 20. Take a certain amount of A glue component and B glue component in proportion, and then mix the A glue component and the B glue component evenly. Apply the evenly mixed AB glue to the cavity wall of the expansion cavity 101 and the light guide filament 20. After waiting for the AB glue to solidify, the light guide filament 20 can be bonded to the cavity wall of the expansion cavity 101.
[0067] In step S2, the dispersing tool 4 usually has a pointed cone surface or a pointed cone head. When the dispersing tool 4 is used to disperse the light guide filaments 20 of the light guide light 2, the light guide filaments 20 are aligned as much as possible at the center of the end face of the light guide light 2, thereby evenly squeezing and dispersing the light guide filaments 20 to the surroundings.
[0068] For example, if expansion cavity 101 is a conical cavity, dispersion fixture 4 has a conical tip that matches the conical cavity. When the conical tip of dispersion fixture 4 is aligned with the center of the end face of light guide 2 and pressed downward, light guide filament 20 is pressed against the conical cavity wall. If expansion cavity 101 is a cavity of other shapes, a corresponding dispersion fixture 4 should be designed, which will not be listed here.
[0069] S2.1: After dispersing fixture 4 squeezes light guide filament 20 against the wall of expansion cavity 101 and secures it with glue, dispersing fixture 4 can be removed. This creates a cavity 201 in the center of light guide 2. Filling cavity 201 with filler 3 smoothes the end face of light guide 2. In this step, filler 3 is transparent or translucent. It can be a solidified form of Class AB glue, silicone, or resin. Filler 3 is used to secure the position of light guide filament 20.
[0070] Since glue is applied to the exposed light guide filament 20 in step S1.1, when the light guide filament 20 is squeezed and dispersed using the dispersion tooling 4, the glue on the light guide filament 20 will adhere to the conical surface of the dispersion tooling 4. In order to prevent the light guide filament 20 from bonding to the dispersion tooling 4, an anti-stick coating can be provided on the conical surface of the dispersion tooling 4. After the inclined light guide filament 20 is bonded and shaped, the dispersion tooling 4 can be removed, and then the cavity 201 in the middle of the light guide beam 2 can be encapsulated with Class AB glue; of course, the conical tip of the dispersion tooling 4 can also be directly left in the cavity 201 to act as a filling body 3.
[0071] In step S3, since the end of the light guide filament 20 needs to be flush with the end face of the light guide channel 10, the initial length of the light guide filament 20 needs to be sufficient to avoid retraction into the expansion cavity 101 after tilting, squeezing and dispersion. However, the longer light guide filament 20 extends out of the expansion cavity 101, resulting in the end of the shaped light guide filament 20 still being outside the expansion cavity 101. Therefore, the shaped light guide filament 20 needs to be trimmed. Similarly, the filling body 3 may also be higher than the end face of the light guide channel 10. Therefore, the filling body 3 also needs to be polished to make the light guide filament 20 and the filling body 3 flush with the end face of the light guide channel 10 so as not to affect the illumination of the outgoing light.
[0072] The forming method of the tip structure of the embodiment of the present invention is simple and efficient, can be produced quickly on a large scale, and has low production cost.
[0073] An embodiment of the present invention further provides an endoscope comprising the aforementioned tip structure, which possesses all the functions of the tip structure. Furthermore, the endoscope includes an insertion portion, within which are disposed an operating channel 5 and a camera channel. The operating channel 5 corresponds to and communicates with the operating channel 5 of the end housing 1, while the camera channel corresponds to and communicates with the camera channel of the end housing 1. The operating channel 5 is used for inserting surgical instruments or performing other operations, while the camera assembly 6 is used for capturing images of the target area. The light guide 2 of the tip structure provides sufficient illumination for the camera assembly 6, ensuring clear images.
[0074] The endoscope's light guide plug is connected to an external light source device. The light emitted by the light source device is transmitted through the light guide plug into the optical fiber bundle and finally emitted from the end of the light guide 2 of the end housing 1. Because the light guide 2 of the end housing 1 is divergent, it can provide a wider range of illumination for the endoscope while ensuring uniform brightness of the illumination light, meeting the needs of endoscopic surgery.
[0075] After establishing a simulation model for simulation, the conical expansion cavity 101 with a height of 5 cm and the tilt angle of the light guide filament 20 is 5°, so the effective illumination range of the emitted light reaches at least 25 cm in diameter. Compared with the conventional light guide 2 setting, the illumination range is significantly expanded.
[0076] In other embodiments, the cone angle of the conical expansion cavity 101 can be adjusted based on the size of the irradiated body cavity. The height of the conical expansion cavity 101 can also be shortened to reduce the structural length of the end shell 1, thereby adapting to the tortuous and changeable body cavity passage.
[0077] 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 a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.
Claims
1. A tip structure, characterized in that: include: An end housing (1), wherein the end housing (1) is provided with a light guide channel (10); A light guide (2) is accommodated in the light guide channel (10) and extends to the exit end of the light guide channel (10), and the end of the light guide (2) is divergent at the exit end of the light guide channel (10).
2. The tip structure according to claim 1, characterized in that: The light guide channel (10) comprises an expansion cavity (101) and a convergence cavity (102), the expansion cavity (101) and the convergence cavity (102) are connected, and the end of the light guide (2) is accommodated in the expansion cavity (101); The inner diameter of the expansion cavity (101) gradually expands, the large diameter end of the expansion cavity (101) is located on the outlet side of the light guide channel (10), and the small diameter end of the expansion cavity (101) is connected to the focusing cavity (102).
3. The tip structure according to claim 2, characterized in that: The expansion cavity (101) is a conical cavity, and the end surface of the expansion cavity (101) is circular; The light guide (2) comprises a plurality of light guide filaments (20), and the plurality of light guide filaments (20) are closely attached to the cavity wall of the conical cavity and are evenly distributed along the cavity wall of the conical cavity.
4. The tip structure according to claim 2, characterized in that: The end face shape of the expansion cavity (101) is any one of circular, semicircular, elliptical, rectangular and heart-shaped.
5. The tip structure according to claim 1, characterized in that: The light guide (2) diverges and forms a cavity (201), the cavity (201) is located in the middle of the light guide (2), and a filling body (3) is provided in the cavity (201).
6. The tip structure according to claim 2, characterized in that: The light guide (2) in the expansion cavity (101) and the light guide (2) in the convergence cavity (102) form an included angle β, 2°≤β≤30°.
7. The tip structure according to any one of claims 2 to 6, characterized in that: A guiding groove is provided on the inner wall of the expansion cavity (101), and at least a portion of the guiding light beam (2) is accommodated in the guiding groove.
8. A method for forming a tip structure, for forming the tip structure according to any one of claims 1 to 7, characterized in that: include: Stripping off the outer covering of the light guide beam (2) at one side of the exit end of the light guide channel (10) to expose all the light guide filaments (20) of the light guide beam (2); Using a dispersion tool (4) to insert from the end of the light guide (2), the light guide wire (20) is inclined and dispersed toward the cavity wall of the expansion cavity (101), and the position of the dispersed light guide wire (20) is positioned; The scattered light guide filaments (20) are trimmed so that the light guide filaments (20) are flush with the end surface of the light guide channel (10).
9. The method for forming a tip structure according to claim 8, wherein: The obliquely dispersed light guide filaments (20) are bonded to the inner wall of the light guide channel (10).
10. An endoscope, characterized in that: The method comprises the tip structure as described in any one of claims 1 to 7.