An endoscope, a distal end assembly thereof, and a method of manufacturing a distal end assembly

Abstract

An endoscope, a distal end assembly thereof and a manufacturing method of the distal end assembly, relate to the technical field of endoscopes, the distal end assembly of the endoscope comprises a camera module, an illumination module and a head seat, the camera module is used for acquiring images of a target position, the illumination module is used for providing a light source for the target position, the head seat has a proximal end and a distal end arranged oppositely, the head seat is provided with a module mounting hole and an illumination mounting hole which are in communication with each other, the module mounting hole penetrates through the head seat along a direction from the proximal end to the distal end, at least part of the camera module is adhered to the distal end of the module mounting hole through an adhesive, the illumination mounting hole is used for mounting the illumination module, and a groove is arranged between the distal end surface of the illumination mounting hole and the distal end surface of the module mounting hole, the groove is used for limiting diffusion of the adhesive. The distal end assembly has a smaller size, a wide range of use, and can solve the problem of poor image quality and poor image quality consistency caused by the contact between the adhesive and the light emitting surface, so as to realize better image quality.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of endoscopes, and more particularly to an endoscope, a tip assembly of the endoscope and a manufacturing method of the tip assembly. BACKGROUND

[0002] An endoscope is a detection instrument integrating traditional optics, human engineering, precision machinery, modern electronics, mathematics and software. With the rapid development of science and technology and medical technology in recent years, minimally invasive or non-invasive medical examination and treatment using endoscopes has been widely popularized. An endoscope can be inserted into a human body through a natural channel or a surgical incision to examine or treat internal organs. On the one hand, the size of the endoscope, especially the maximum size of the tip, affects the use experience of the patient and limits the use range of the endoscope; on the other hand, the endoscope is an important tool for doctors to diagnose diseases, and the image quality directly relates to the accuracy and effect of diagnosis. SUMMARY

[0003] The present application provides an endoscope, a tip assembly of the endoscope and a manufacturing method of the tip assembly, which can reduce the size of the tip assembly, improve the use range thereof, and solve the problem of poor image quality and image quality consistency caused by the contact between the adhesive and the light-emitting surface, so as to achieve better image quality.

[0004] The present application provides a tip assembly of an endoscope, comprising:

[0005] a camera module configured to acquire an image of a target position;

[0006] an illumination module configured to provide a light source for the target position; and

[0007] a head seat having a proximal end and a distal end arranged oppositely, and a module mounting hole and an illumination mounting hole being arranged in the head seat and being in communication with each other, the module mounting hole penetrating through the head seat in a direction from the proximal end to the distal end, and at least part of the camera module being adhered to the distal end of the module mounting hole by an adhesive; the illumination mounting hole is configured to mount the illumination module, and a groove is arranged between the distal end surface of the illumination mounting hole and the distal end surface of the module mounting hole, the groove being configured to limit the diffusion of the adhesive.

[0008] In some optional embodiments, the groove comprises a groove distal end face, a first side face, a second side face and a third side face, the first side face is connected with the distal end face of the illumination mounting hole, the second side face and the third side face are oppositely arranged on both sides of the first side face, and the groove distal end face is connected with the distal ends of the first side face, the second side face and the third side face to form a structure with a proximal end and a side face open towards the module mounting hole, so that the illumination mounting hole, the module mounting hole and the groove are in communication with each other.

[0009] In some optional embodiments, the groove distal end face, the first side face, the second side face and the third side face are planar structures or curved surface structures.

[0010] In some optional embodiments, the distal end of the head end seat is further provided with a filling groove arranged along the circumference of the module mounting hole, the proximal end face of the filling groove is in communication with the distal end face of the groove, and the filling groove is filled with the adhesive.

[0011] In some optional embodiments, the proximal end of the illumination mounting hole and / or the module mounting hole is also provided with the adhesive, and the distal end of the adhesive located in the illumination mounting hole and / or the module mounting hole is spaced apart from the proximal end of the illumination module to form an air gap.

[0012] In some optional embodiments, the distal end face of the illumination module is arranged close to the distal end face of the illumination mounting hole, and the distal end face of the camera module is arranged exposed to the distal end face of the module mounting hole.

[0013] The illumination module comprises two illumination units, the two illumination units are respectively arranged on the outer side face of the camera module along the radial direction, the illumination mounting hole and the module mounting hole are coaxially arranged, and the illumination mounting hole is arranged on both sides of the module mounting hole.

[0014] In some optional embodiments, the proximal end of the head end seat is provided with an insertion tube interface, the insertion tube interface is used to connect with the insertion tube at the proximal end of the head end seat, and the distal end face of the insertion tube interface is located between the proximal end face and the distal end face of the illumination mounting hole.

[0015] The outer side of the distal end of the head end seat is provided with a positioning notch, the positioning notch is used for directional positioning during installation of the camera module.

[0016] The application also provides an endoscope comprising the above-mentioned head end assembly.

[0017] The application also provides a manufacturing method of a head end assembly of an endoscope, which is used to manufacture the above-mentioned head end assembly, and the steps of the method comprise:

[0018] providing a head-end seat with a module mounting hole and a lighting mounting hole, the head-end seat having oppositely arranged proximal and distal ends;

[0019] inserting an integrated structure of a camera module and a lighting module from the proximal end, and allowing the camera module to be at least partially located in the module mounting hole, and the lighting module to be located in the lighting mounting hole;

[0020] filling adhesive between the distal end of the module mounting hole and the camera module, and allowing the adhesive to creep along the gap between the camera module and the module mounting hole and part of the groove structure, so that the camera module is at least partially embedded in the adhesive, and the adhesive is away from the distal end face of the lighting module;

[0021] using physical or chemical methods to cause the adhesive to harden, so that the adhesive fills and connects the gap between the module mounting hole and the camera module.

[0022] In some optional embodiments, the steps further include: filling adhesive in the proximal end of the module mounting hole and / or the lighting mounting hole, allowing the adhesive to flow along the space in the hole, and ensuring that there is at least a partial air gap between the distal end of the lighting mounting hole and the distal end of the adhesive.

[0023] According to the above-mentioned endoscopic head-end assembly, comprising a camera module, a lighting module and a head-end seat, the head-end seat has oppositely arranged proximal and distal ends, the head-end seat is provided with a module mounting hole and a lighting mounting hole which are in communication with each other, the module mounting hole penetrates through the head-end seat from the proximal end to the distal end, at least part of the camera module is adhered to the distal end of the module mounting hole by adhesive, the lighting mounting hole is used for mounting the lighting module, and a groove is arranged between the distal end face of the lighting mounting hole and the distal end face of the module mounting hole, which is used for limiting the diffusion of the adhesive. Since the module mounting hole and the lighting mounting hole are formed in the head-end seat and are in communication with each other without any blockage, the size of the head-end seat can be reduced, which facilitates the entry of the head-end seat into various narrow passages in the human body and improves the use range of the endoscope. Since the groove is arranged between the distal end face of the lighting mounting hole and the distal end face of the module mounting hole, the gap between the module mounting hole and the camera module can be locally increased, the capillary effect is weakened, the diffusion of the adhesive is limited, the adhesive cannot contact the light-emitting surface, the problem of poor image quality and image quality consistency caused by the contact between the adhesive and the light-emitting surface is solved, better image quality can be achieved, and the user experience of the operator can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is an embodiment of the assembly and disassembly schematic diagram of the head-end assembly.

[0025] Figure 2 is a sectional view of the structure of the head-end seat in an embodiment;

[0026] Figure 3 is Figure 2 is a partial enlarged view at A in the middle;

[0027] Figure 4 is a schematic view of the proximal end structure of the head-end seat in an embodiment;

[0028] Figure 5 is a partial sectional view of the structure of the head-end seat in an embodiment;

[0029] Figure 6 is a schematic view of the assembly of the front-end assembly in an embodiment;

[0030] Figure 7 is a schematic view of the filling of the first adhesive in the front-end assembly in an embodiment;

[0031] Figure 8 is a schematic view of the filling of the second adhesive in the front-end assembly in an embodiment on the basis of Figure 7 ;

[0032] Figure 9 is a schematic view of the integrated structure of the camera module and the illumination module in an embodiment;

[0033] Figure 10 is a schematic view of the three-dimensional structure of the head-end seat in an embodiment.

[0034] Wherein: 1, front-end assembly; 11, camera module; 111, positioning mark; 12, illumination module; 121, illumination unit; 13, head-end seat; 131, module mounting hole; 132, illumination mounting hole; 1321, air gap; 133, groove; 1331, distal end face of the groove; 1332, first side face; 1333, second side face; 1334, third side face; 134, filling groove; 135, insertion pipe interface; 136, positioning notch; 14, first adhesive; 15, second adhesive. DETAILED DESCRIPTION

[0035] The application will be described in further detail below with specific reference being made to the drawings. Like elements are referred to with like reference numerals throughout the specification. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the application. However, it will be apparent to one skilled in the art that parts of the application can be practiced without some or all of these details. In other instances, well known process steps have not been described in detail in order not to unnecessarily obscure the application. Although in the following description, various exemplary embodiments of the present application are described with reference to a specific implementation, various modifications and changes can be made thereto by those skilled in the art without departing from the broader spirit and scope of the application as set forth in the appended claims.

[0036] In addition, the features, operations or steps of the description can be combined in any suitable manner in various embodiments, and the steps involved in the various embodiments can be sequentially adjusted or changed in a manner that can be easily understood by those skilled in the art. Therefore, the description and drawings are only for the purpose of clearly describing one embodiment, and do not mean that the composition and / or order is necessary.

[0037] In this paper, the serial number of the component itself, such as "first", "second", etc., is only used to distinguish the described object, and has no technical meaning. The "connection" and "coupling" in this application include direct and indirect connection (coupling) unless otherwise specified.

[0038] It should be noted that when an element is referred to as "fixed to" another element, it can be directly on another element or there can be a middle element. When an element is referred to as "connected to" another element, it can be directly connected to another element or there can be a middle element. The terms "vertical", "horizontal", "left", "right", and similar expressions used herein are for illustrative purposes only.

[0039] In this application, the terms "up", "down", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the application and its embodiments, and are not used to limit the indicated device, element or component to have a specific orientation, or to be constructed and operated in a specific orientation. In addition, in addition to indicating the orientation or positional relationship, some of the above terms can also be used to indicate other meanings, for example, the term "up" can also be used to indicate a certain dependent relationship or connection relationship in some cases. For those skilled in the art, the specific meaning of these terms in this application can be understood according to the specific situation.

[0040] Furthermore, the terms "mount", "set", "provided with", "connected", "linked" should be interpreted broadly. For example, it can be a fixed connection, detachable connection, or integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or an internal connection between two devices, elements or components. The specific meaning of the above terms in the present application can be understood according to the specific circumstances by those skilled in the art.

[0041] In order to more clearly describe the structure of the present application, "proximal end" and "distal end" are used as directional words, "proximal end" means the end of the structure close to the operator during use, and "distal end" means the end of the structure away from the operator during use, i.e. the end close to the patient or inserted into the patient's body.

[0042] The present application provides an endoscope, which can be a laparoscope, a renal pelvis mirror, etc. Please refer to Figure 1 , the endoscope comprises an operating handle (not shown in the figure), an insertion tube (not shown in the figure) and a tip assembly 1, the insertion tube is arranged at the proximal end of the tip assembly 1, the operating handle is arranged at the proximal end of the insertion tube, and at least part of the insertion tube is fixedly arranged in or on the operating handle, the insertion tube can be inserted into a target position, and the operating handle can control the movement and rotation of the insertion tube and the tip assembly 1 to adjust the position thereof.

[0043] Please refer to Figures 1 to 10 , the tip assembly 1 comprises a camera module 11, an illumination module 12 and a head seat 13. The camera module 11 is used to obtain images of the target position, and the illumination module 12 is used to provide a light source for the target position; the head seat 13 has a proximal end and a distal end arranged oppositely, and the distal end of the head seat 13 can define the distal end of the tip assembly 1, and the proximal end of the head seat 13 can define the proximal end of the tip assembly 1, and the proximal end of the head seat 13 is an open structure so as to place other structural components into the head seat 13. The head seat 13 is provided with a module mounting hole 131 and an illumination mounting hole 132 which are in communication with each other, i.e. at least one side surface of the module mounting hole 131 and the illumination mounting hole 132 coincides, the module mounting hole 131 penetrates through the head seat 13 along the direction from the proximal end to the distal end, is used to mount and arrange a module, and at least part of the camera module 11 is adhered (or attached) to the distal end of the module mounting hole 131 by an adhesive; the illumination mounting hole 132 is used to mount the illumination module 12, and a groove 133 is arranged between the distal end surface of the illumination mounting hole 132 and the distal end surface of the module mounting hole 131, and the groove 133 is used to limit the diffusion of the adhesive.

[0044] As the module mounting hole 131 and the illumination mounting hole 132 are formed in the head seat 13 and communicate with each other, no barrier is arranged, which helps to reduce the size of the head seat 13, facilitates the head seat 13 to enter a narrow channel in the human body, and can improve the use range of the endoscope.

[0045] It can be understood that, considering the cost and installation difficulty, the camera module 11 is adhered in the module mounting hole 131 by an adhesive to achieve a fixed connection therebetween. However, the adhesive is generally in a liquid form and has a certain flowability, and there is a possibility that the adhesive flows to the light-emitting surface of the illumination module 12, which may affect the final image quality of the camera module 11.

[0046] The distal end of the illumination mounting hole 132 does not penetrate the head seat 13, so that the distal end of the illumination mounting hole 132 forms a thin-walled structure, which can protect the light-emitting surface. However, in order to better fix and position the camera module 11, the gap between the camera module 11 and the module mounting hole 131 should be as small as possible when they are assembled. The existence of a small gap is prone to capillary effect, and the adhesive based on the capillary effect flows along the gap between the camera module 11 and the module mounting hole 131 and is prone to flow to the light-emitting surface, so that the thin-walled structure fails to protect the light-emitting surface.

[0047] To solve the above problems, the present application creatively provides a groove 133 between the distal end face of the illumination mounting hole 132 and the distal end face of the module mounting hole 131. The groove 133 locally increases the gap between the module mounting hole 131 and the camera module 11, thereby weakening the capillary effect, limiting the diffusion of the adhesive, and preventing the adhesive from contacting the light-emitting surface. The above problems of the adhesive contacting the light-emitting surface to affect the image quality and the consistency of the image quality are solved, better image quality is achieved, and the use experience of the operator and the patient is improved.

[0048] Please refer to Figure 3 and Figure 4 In some embodiments, the groove 133 includes a groove distal end face 1331, a first side face 1332, a second side face 1333, and a third side face 1334. The first side face 1332 is connected with the distal end face of the illumination mounting hole 132. The second side face 1333 and the third side face 1334 are oppositely arranged on the two sides of the first side face 1332. The groove distal end face 1331 is connected with the distal ends of the first side face 1332, the second side face 1333, and the third side face 1334 to form a structure with an open proximal end and a side face facing the module mounting hole 131. The illumination mounting hole 132, the module mounting hole 131, and the groove 133 communicate with each other, the cavity wall of the hole structure can be reduced, and the miniaturization design of the head seat 13 is facilitated.

[0049] In some embodiments, the groove distal end face 1331, the first side face 1332, the second side face 1333 and the third side face 1334 can all be planar structures, the groove distal end face 1331 extends in a direction perpendicular to the proximal-to-distal direction, the first side face 1332 is connected with the distal end face of the illumination mounting hole 132, the second side face 1333 and the third side face 1334 are oppositely arranged on the two sides of the first side face 1332, and the first side face 1332, the second side face 1333 and the third side face 1334 extend in a direction parallel to the proximal-to-distal direction, the second side face 1333 and / or the third side face 1334 is connected with or coincides with the module mounting hole 131, the second side face 1333 and / or the third side face 1334 is connected with or coincides with the illumination mounting hole 132, the groove distal end face 1331 and the first side face 1332 are connected to form a stepped structure, when the camera module 11 is installed in the module mounting hole 131 and fixed at the distal end, the stepped structure increases the gap between the camera module 11 and the side face of the module mounting hole 131, weakening the capillary effect of the adhesive in the gap, thereby effectively avoiding the adhesive from climbing along the distal end face of the illumination mounting hole 132 and contacting the light-emitting surface.

[0050] In other embodiments, the groove distal end face 1331, the first side face 1332, the second side face 1333 and the third side face 1334 can all be planar structures, and an included angle (acute or obtuse) is formed between the groove distal end face 1331 and the first side face 1332, the second side face 1333 and the third side face 1334, which can also increase the gap between the camera module 11 and the side face of the module mounting hole 131.

[0051] In some embodiments, at least one of the groove distal end face 1331, the first side face 1332, the second side face 1333 and the third side face 1334 can be a curved surface structure. For example, the first side face 1332, the second side face 1333 and the third side face 1334 are curved surface structures and are continuously arranged to form a smooth circular arc surface.

[0052] Please refer to Figure 6 and Figure 7 In some embodiments, the distal end of the head end seat 13 is further provided with a filling groove 134, the filling groove 134 is arranged along the circumference of the module mounting hole 131, the proximal end face of the filling groove 134 is in communication with the distal end face of the groove 133, and a part of the side face of the module mounting hole 131 is arranged between the proximal end face of the filling groove 134 and the distal end face of the groove 133, which realizes the communication between the filling groove 134 and the groove 133, and the filling groove 134 is filled with adhesive. During assembly, the adhesive can be filled from the distal end to the proximal end, and part of the adhesive can be filled in the filling groove 134 to realize the connection between the camera module 11 and the module mounting hole 131. Due to the arrangement of the filling groove 134, part of the adhesive can be stored, thereby improving the reliability of the connection between the module mounting hole 131 and the camera module 11.

[0053] Please refer to Figure 8 In some embodiments, adhesive is also provided in the proximal end of the illumination mounting hole 132 and / or the module mounting hole 131, and the portion of the adhesive fills from the proximal end. The distal end of the adhesive located in the illumination mounting hole 132 is spaced apart from the proximal end of the illumination module 12, so that an air gap 1321 is formed between the portion of the adhesive and the distal end face (or the proximal end face of the light emitting surface) of the illumination mounting hole 132, which can further improve the mounting stability of the camera module 11 and reduce the possibility of contact between the portion of the adhesive and the light emitting surface.

[0054] For the sake of distinction and illustration, the adhesive between the camera module 11 and the module mounting hole 131 is defined as the first adhesive 14, and the adhesive in the illumination mounting hole 132 and / or the module mounting hole 131 is defined as the second adhesive 15, as shown in Figure 8 .

[0055] It should be understood that the module mounting hole 131 mentioned above is used to mount the camera module 11, and is not limited to the camera module 11 being completely mounted in the module mounting hole 131. On the contrary, at least part of the structure of the camera module 11 can be exposed outside the module mounting hole 131 (or the head end seat 13), for example, the distal end face of the camera module 11 can be exposed outside the distal end face of the module mounting hole 131.

[0056] In some embodiments, the distal end face of the illumination module 12 is arranged close to the distal end face of the illumination mounting hole 132, that is, the distal end face of the light emitting surface of the illumination module 12 can coincide with the distal end face of the illumination mounting hole 132, or the distal end face of the light emitting surface of the illumination module 12 can be spaced apart from the distal end face of the illumination mounting hole 132, leaving a small gap therebetween (the gap can be intentionally designed during design, or can be formed due to machining error), which can avoid a "hard collision" between the light emitting surface and the distal end face of the illumination mounting hole 132, and protect the light emitting surface.

[0057] Please refer to Figure 9 In some embodiments, the illumination module 12 includes two illumination units 121, which are respectively arranged on the outer side of the camera module 11 along the radial direction and are integrally formed with the camera module 11, which facilitates integrated assembly and can simplify the assembly steps. In order to adapt to this structure, the illumination mounting hole 132 and the module mounting hole 131 are coaxially arranged, and the illumination mounting hole 132 is correspondingly arranged on both sides of the module mounting hole 131, so that the side faces of the illumination mounting hole 132 and the module mounting hole 131 coincide.

[0058] Of course, in other embodiments, when the illumination module 12 includes one illumination unit 121, the illumination unit 121 is disposed on the outer side of the camera module 11, the illumination mounting hole 132 and the module mounting hole 131 are disposed along the radial direction of the head seat 13, and the illumination mounting hole 132 and the module mounting hole 131 only partially coincide in side. When the illumination module 12 is provided with three or more, the illumination mounting hole 132 can be disposed around the module mounting hole 131.

[0059] Please continue to refer to Figure 2 In some embodiments, the proximal end of the head seat 13 is provided with an insertion tube interface 135 for connecting with the insertion tube at the proximal end of the head seat 13. The distal end surface of the insertion tube interface 135 is located between the proximal end surface and the distal end surface of the illumination mounting hole 132, and also between the proximal end surface and the distal end surface of the module mounting hole 131, so that the insertion tube can be inserted into the head seat 13, facilitating firm connection.

[0060] Please refer to Figure 10 In some embodiments, the outer side of the distal end of the head seat 13 is provided with a positioning notch 136 for directional positioning during installation of the camera module 11. The head seat 13 is generally cylindrical in structure, and the positioning notch 136 is formed by recessing part of the side wall of the cylindrical structure towards the center. Through the provision of the positioning notch 136, the orientation of the camera module 11 during installation can be determined to facilitate correct installation. Correspondingly, please continue to refer to Figure 9 The camera module 11 can also be provided with a positioning mark 111. During assembly, the positioning notch 136 and the positioning mark 111 are oriented in the same direction, i.e., both are upward, leftward, rightward or downward.

[0061] The second embodiment of the present application provides the head assembly 1 as described above, the structure of which has been described in detail above and will not be described again here.

[0062] The third embodiment of the present application provides a method for manufacturing a head assembly 1 of an endoscope, for manufacturing the head assembly as described above, the steps of which include:

[0063] Providing a head seat 13 with a module mounting hole 131 and an illumination mounting hole 132, the head seat 13 having oppositely disposed proximal and distal ends.

[0064] Inserting an integrated structure composed of the camera module 11 and the illumination module 12 from the proximal end, and making the camera module 11 at least partially located in the module mounting hole 131 and the illumination module 12 located in the illumination mounting hole 132, as shown in Figure 6 .

[0065] The first adhesive 14 is filled between the distal end of the module mounting hole 131 and the camera module 11, and is allowed to climb along the gap between the camera module 11 and the module mounting hole 131 and part of the structure of the groove 133, so that the camera module 11 is at least partially embedded in the first adhesive 14, and the first adhesive 14 is away from the distal end face of the illumination module 12, as shown in Figure 7 .

[0066] The first adhesive 14 is hardened by physical or chemical methods to fill and connect the gap between the module mounting hole 131 and the camera module 11.

[0067] In some embodiments, the above manufacturing method further includes: filling the second adhesive 15 in the proximal end of the module mounting hole 131 and / or the illumination mounting hole 132, allowing the second adhesive 15 to flow along the space in the hole, and ensuring that there is at least a partial air gap 1321 between the distal end of the illumination mounting hole 132 and the distal end of the second adhesive 15, as shown in Figure 8 . In this embodiment, the second adhesive 15 is also allowed to be hardened by physical or chemical methods.

[0068] It should be noted that the initial state of the first adhesive 14 and the second adhesive 15 is liquid, which has a certain flowability, which can increase the contact area of the first adhesive 14 with the camera module 11 and / or the module mounting hole 131, the second adhesive 15 and the illumination mounting hole 132, so that the first adhesive 14 and the second adhesive 15 can fill the mounting gap and increase the stability of the connection.

[0069] In one embodiment, the above method of using physical or chemical methods to harden the first adhesive 14 and the second adhesive 15 includes using special light illumination (such as ultraviolet light irradiation hardening).

[0070] The fourth embodiment of the present application provides a manufacturing method of an endoscope, which includes the manufacturing method of the above-mentioned front end assembly 1, and the manufacturing method of the front end assembly 1 has been described in detail above, and will not be described in detail here.

[0071] The above application of specific examples to explain the present application is only used to help understand the present application and does not limit the present application. For those skilled in the art to which the present application belongs, according to the idea of the present application, a number of simple deductions, deformations or substitutions can be made.

Claims

1. A tip assembly of an endoscope, characterized in that: include: A camera module, the camera module is used to obtain an image of the target location; an illumination module, the illumination module being used to provide a light source to the target location; as well as A head end seat, the head end seat having a proximal end and a distal end arranged opposite to each other, and a module mounting hole and a lighting mounting hole communicating with each other are provided in the head end seat, the module mounting hole passes through the head end seat in a direction from the proximal end to the distal end, at least a portion of the camera module is adhered to the distal end of the module mounting hole by an adhesive; the lighting mounting hole is used to mount a lighting module, and a groove is provided between the distal end surface of the lighting mounting hole and the distal end surface of the module mounting hole, the groove being used to limit the diffusion of the adhesive; The groove includes a distal end face of the groove, a first side face, a second side face and a third side face, the first side face is connected to the distal end face of the lighting mounting hole, the second side face and the third side face are relatively arranged on both sides of the first side face, the distal end face of the groove is connected to the distal ends of the first side face, the second side face and the third side face to form a structure that is open at the proximal end and the side face toward the module mounting hole, so that the lighting mounting hole, the module mounting hole and the groove are connected to each other.

2. The endoscope tip assembly according to claim 1, characterized in that The distal end surface of the groove, the first side surface, the second side surface and the third side surface are planar structures or curved structures.

3. The endoscope tip assembly according to claim 1, wherein: A filling groove is further provided at the distal end of the head end seat. The filling groove is arranged along the circumference of the module mounting hole. The proximal end surface of the filling groove is connected to the distal end surface of the groove. The filling groove is filled with the adhesive.

4. The endoscope tip assembly according to claim 1, wherein: The adhesive is also provided in the proximal end of the lighting installation hole and / or the module installation hole, and the distal end of the adhesive in the lighting installation hole and the proximal end of the lighting module are spaced apart to form an air gap.

5. The endoscope tip assembly according to claim 1, wherein: The distal end face of the lighting module is arranged close to the distal end face of the lighting installation hole, and the distal end face of the camera module is exposed at the distal end face of the module installation hole; The lighting module includes two lighting units, which are respectively arranged on the outer side of the camera module in the radial direction. The lighting mounting hole and the module mounting hole are coaxially arranged, and the lighting mounting hole is arranged on both sides of the module mounting hole.

6. The endoscope tip assembly according to claim 1, wherein: The proximal end of the head end seat is provided with an insertion tube interface, the insertion tube interface is used to connect with the insertion tube at the proximal end of the head end seat, and the distal end surface of the insertion tube interface is located between the proximal end surface and the distal end surface of the lighting installation hole; A positioning notch is provided on the outer side of the distal end of the head end seat, and the positioning notch is used for directional positioning during the installation of the camera module.

7. An endoscope, characterized in that: Comprising the tip assembly according to any one of claims 1-6.

8. A method for manufacturing a tip assembly of an endoscope, characterized in that: The method for producing a tip assembly according to any one of claims 1 to 6 comprises the following steps: A head end base is provided with a module mounting hole and a lighting mounting hole, wherein the head end base has a proximal end and a distal end that are arranged opposite to each other; Inserting the integrated structure consisting of the camera module and the lighting module from the proximal end, so that the camera module is at least partially located in the module mounting hole, and the lighting module is located in the lighting mounting hole; Filling adhesive between the distal end of the module mounting hole and the camera module, and allowing the adhesive to climb along the gap between the camera module and the module mounting hole and a portion of the structure of the groove, so that the camera module is at least partially embedded in the adhesive and the adhesive is kept away from the distal end surface of the lighting module; The adhesive is hardened by using a physical or chemical method, so that the adhesive fills the gap between the module mounting hole and the camera module and connects them.

9. The method for manufacturing the distal end assembly of an endoscope according to claim 8, wherein: The step also includes: filling adhesive into the proximal end of the module mounting hole and / or the lighting mounting hole, allowing the adhesive to flow along the space in the hole, and ensuring that there is at least a partial air gap between the distal end of the lighting mounting hole and the distal end of the adhesive.

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