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

Abstract

The application discloses an endoscope, a tip assembly thereof and a manufacturing method of the tip assembly, and relates to the technical field of endoscopes. The tip assembly comprises a head end seat and a flexible circuit board. The head end seat is provided with a proximal end and a distal end which are oppositely arranged. At least one element mounting hole is arranged in the head end seat. The element mounting hole comprises a distal end wall and a circumferential side wall. The circumferential side wall and the distal end wall enclose the element mounting hole which is open at the proximal end. The flexible circuit board can be inserted into the element mounting hole through the proximal end and is at least partially accommodated in the element mounting hole. The flexible circuit board is provided with a connecting point, an input point and an illumination element. The illumination element is at least partially accommodated in the element mounting hole and is electrically connected with the connecting point. The connecting point is electrically connected with the input point. The input point is electrically connected with an external circuit. The application can reduce the contact probability of the illumination element and the adhesive in the assembly process, reduce the influence of the long welding time on the illumination element, improve the image quality and improve the use experience of the operator.

Description

Technical Field

[0001] The present application relates to the technical field of endoscopes, and more particularly to an endoscope, a distal end component thereof, and a method for manufacturing the distal end component. Background Art

[0002] Endoscopes are inspection instruments that integrate traditional optics, ergonomics, precision mechanics, modern electronics, mathematics, and software. With the rapid advancement of science and medical technology in recent years, minimally invasive and non-invasive medical examinations and treatments using endoscopes have become widely available. Endoscopes can enter the human body through natural channels or surgical incisions to examine or treat internal organs. Endoscopes are essential diagnostic tools for doctors, and the quality of their images is directly related to the accuracy and effectiveness of the diagnosis.

[0003] Endoscopes can be divided into LED lighting and fiber optic lighting according to their lighting type. Fiber optic lighting is gradually being replaced by LED lighting in recent years due to its high cost of optical fiber materials and manufacturing and assembly processes, high and difficult maintenance costs, and inflexible light intensity adjustment. At the same time, in order to achieve better image quality, multiple LED lighting is generally used to achieve better lighting uniformity.

[0004] Currently, in endoscopes equipped with LED lighting at the head, the camera and LED components are often connected using multi-strand coaxial cables. This means the camera module cable and the LED light cable are integrated into a single cable. To facilitate installation of the LED into the head-mounted socket, a free section of light cable is typically left at the tail of the LED, with the other end extending from the side of the module. The connection between the LED and the tail light cable is typically performed by manual soldering. Due to the small size of the LED, prolonged soldering heating often results in changes in the LED illumination, affecting endoscopic image quality.

[0005] It can be seen from this that how to improve image quality is a technical problem that needs to be solved urgently in this field. Summary of the Invention

[0006] The present application provides an endoscope, a distal end component thereof, and a method for manufacturing the distal end component, which can effectively improve image quality.

[0007] The present application provides a front-end component, including:

[0008] A head end seat, the head end seat having a proximal end and a distal end disposed opposite to each other, at least one component mounting hole being provided in the head end seat, the component mounting hole comprising a distal end wall and a circumferential side wall, the circumferential side wall and the distal end wall enclosing the component mounting hole with a proximal end open;

[0009] and a flexible circuit board capable of being inserted into the component mounting hole through the proximal end and at least partially accommodated in the component mounting hole; the flexible circuit board having a connection point, an input point, and a lighting element, the lighting element being at least partially accommodated in the component mounting hole and electrically connected to the connection point, the connection point being electrically connected to the input point, and the input point being electrically connected to an external circuit.

[0010] In some optional embodiments, the front-end component further includes a filler, which is accommodated in the component mounting hole through the proximal end and covers at least a portion of the flexible circuit board, and the distal end surface of the filler and the distal end wall of the component mounting hole are spaced apart to form an air gap.

[0011] In some optional embodiments, there are two component mounting holes, and a module mounting hole and a clamp channel hole are provided on the head end seat along the direction from the proximal end to the distal end; the module mounting hole and the clamp channel hole are respectively arranged on both sides of the radial direction of the head end seat, and the two component mounting holes are respectively arranged on both sides of the line connecting the midpoints of the module mounting hole and the clamp channel hole, and are isolated from the module mounting hole and the clamp channel hole.

[0012] In some optional embodiments, the front-end component further includes a camera module, and the camera module is at least partially installed in the module mounting hole.

[0013] In some optional embodiments, the transmission cable of the camera module is electrically connected to the external circuit, the camera module has an output end, and the output end is electrically connected to the input point through a connecting cable; or, the input point is electrically connected to the external circuit through a connecting cable.

[0014] In some optional embodiments, the flexible circuit board includes a main body, a mounting portion and a connecting portion, the input point is arranged on the main body, the connection point is arranged on the mounting portion, and the connecting portion is arranged on the side of the main body and connected to the mounting portion.

[0015] In some optional embodiments, the connecting portion has good toughness and can be bent relative to the main body portion and the mounting portion.

[0016] The present application provides an endoscope, comprising an insertion tube, an operating handle and a tip assembly as described above, wherein the insertion tube is used to connect the operating handle and the tip assembly, and the operating handle can control the movement and / or rotation of the tip assembly through the insertion tube.

[0017] The present application provides a method for manufacturing a front-end component, which is used to manufacture the front-end component described above, and the steps include:

[0018] A head end seat having an element mounting hole is provided, wherein the head end seat has a proximal end and a distal end disposed opposite to each other, the element mounting hole includes a distal end wall and a circumferential side wall, and the circumferential side wall and the distal end wall enclose the element mounting hole with the proximal end open;

[0019] providing a flexible circuit board having connection points, input points and lighting elements;

[0020] The flexible circuit board is installed in the component installation hole.

[0021] In some optional embodiments, the flexible circuit board includes a main body, a mounting portion, and a connecting portion, and the connecting portion has good toughness and can be bent relative to the main body and the mounting portion;

[0022] Before installing the flexible circuit board and the lighting element into the element mounting hole, the flexible circuit board is bent so that the connecting portion is maintained at a preset position relative to the mounting portion;

[0023] When the flexible circuit board and the lighting element are installed in the element installation hole, the distal end surface of the lighting element is arranged parallel to the distal end wall of the element installation hole;

[0024] After the flexible circuit board and the lighting element are installed in the element mounting hole, a filler is filled from the proximal end of the element mounting hole so that the filler covers at least a portion of the flexible circuit board, and a distal end surface of the filler and a distal end wall of the element mounting hole are spaced apart to form an air gap.

[0025] According to the distal end assembly of the endoscope in the above-mentioned embodiment, it includes a head end seat and a flexible circuit board. At least one component mounting hole is provided in the head end seat. The proximal end of the component mounting hole is open. The flexible circuit board can be inserted into the component mounting hole through the proximal end. The flexible circuit board has connection points, input points, and a lighting element. The lighting element is at least partially accommodated in the component mounting hole. The lighting element is connected to the external circuit through the connection points. Since the proximal end of the component mounting hole is open and the distal end is closed, the light-emitting surface of the distal end of the lighting element is prevented from being exposed, and the probability of contact between the lighting element and the adhesive during the assembly process can be reduced, thereby avoiding image quality problems caused by contact between the adhesive and the light-emitting surface of the distal end of the lighting element. Since a flexible circuit board is used instead of a welding wire, and the lighting element is arranged at the connection point of the flexible circuit board, the number of welding points and welding time can be reduced, avoiding the impact of excessive welding time on image quality. It can also achieve quality consistency control of multiple lighting elements, thereby ensuring better image quality of the endoscope and improving the operator's user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1A schematic diagram of the assembly and disassembly of a front-end component in one embodiment;

[0027] Figure 2 A cross-sectional view of the structure of a front-end component in one embodiment;

[0028] Figure 3 A schematic structural diagram of the proximal angle of the front end assembly in one embodiment;

[0029] Figure 4 A schematic diagram of a structure in which a filler is provided in a front-end component in one embodiment;

[0030] Figure 5 A partial structural cross-sectional view of a head end seat in one embodiment;

[0031] Figure 6 This is a schematic structural diagram of the proximal end angle of the head end seat in one embodiment;

[0032] Figure 7 A schematic diagram of a disassembled flexible circuit board and a lighting element in one embodiment;

[0033] Figure 8 A schematic structural diagram of a flexible circuit board in a bent state according to an embodiment;

[0034] Figure 9 Schematic diagram of the assembly of a camera module and a lighting element in one embodiment.

[0035] Among them: 1. Tip component; 11. Head end seat; 111. Component mounting hole; 1111. Distal end wall; 1112. Circumferential side wall; 112. Module mounting hole; 113. Clamp channel hole; 12. Flexible circuit board; 121. Connection point; 122. Input point; 123. Main body; 124. Mounting part; 125. Connection part; 13. Lighting element; 131. Light-emitting surface; 14. Filler; 15. Camera module; 16. Connecting cable; A. Proximal end; B. Distal end; C. Line connecting the midpoints of the module mounting hole and the clamp channel hole. DETAILED DESCRIPTION

[0036] The present application is further described in detail below by means of specific embodiments in conjunction with the accompanying drawings. Similar elements in different embodiments are numbered with associated similar elements. In the following embodiments, many detailed descriptions are provided to enable the present application to be better understood. However, those skilled in the art will readily appreciate that some of the features may be omitted in different circumstances, or may be replaced by other elements, materials, or methods. In some cases, some operations related to the present application are not shown or described in the specification. This is to avoid the core portion of the present application being overwhelmed by excessive descriptions. For those skilled in the art, it is not necessary to describe these related operations in detail. They can fully understand the related operations based on the description in the specification and the general technical knowledge in the art.

[0037] In addition, the features, operations, or characteristics described in the specification may be combined in any appropriate manner to form various implementations, and the operational steps involved in each embodiment may be interchanged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the specification and drawings are only for the purpose of clearly describing a particular embodiment and do not imply a required composition and / or sequence.

[0038] The serial numbers assigned to components herein, such as "first," "second," etc., are used solely to distinguish the objects being described and do not convey any sequential or technical meaning. References to "connection" and "coupling" herein, unless otherwise specified, include both direct and indirect connections (couplings).

[0039] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly attached to the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only.

[0040] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "middle", "vertical", "horizontal", "transverse", "longitudinal" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the present application and its embodiments, and are not intended to limit the indicated devices, elements or components to having a specific orientation, or to be constructed and operated in a specific orientation. Moreover, in addition to being used to indicate orientations or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in the present application can be understood according to the specific circumstances.

[0041] Furthermore, the terms "installed," "disposed," "provided with," "connected," and "connected" should be interpreted broadly. For example, they can refer to fixed connections, removable connections, or integral structures; mechanical connections or electrical connections; direct connections, indirect connections through an intermediary, or internal communication between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0042] In order to more clearly describe the structure of the present application, "proximal end A" and "distal end B" are used as directional words. "Proximal end A" refers to the end of the structure close to the operator when in use, and "distal end B" refers to the end of the structure away from the operator when in use, that is, the end close to the patient or extending into the patient's body.

[0043] The present application provides an endoscope, which can be a laparoscope, a pyeloscope, etc. Figure 1 The endoscope includes 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 a portion of the insertion tube is inserted and fixed in or on the operating handle. The insertion tube is used to connect the operating handle and the tip assembly. The insertion tube can be inserted into the target position, and the operating handle can control the insertion tube and the tip assembly 1 to move and rotate to adjust their position.

[0044] See also Figures 1 to 9 The front-end component 1 includes a head end seat 11 and a flexible circuit board 12. The head end seat 11 has a proximal end A and a distal end B arranged relatively to each other. At least one component mounting hole 111 is provided in the head end seat 11. The component mounting hole 111 includes a distal end wall 1111 and a circumferential side wall 1112. The circumferential side wall 1112 and the distal end wall 1111 enclose the component mounting hole 111 with the proximal end A open; the flexible circuit board 12 can be inserted into the component mounting hole 111 through the proximal end A and at least partially accommodated in the component mounting hole 111; the flexible circuit board 12 has a connection point 121, an input point 122 and a lighting element 13. The lighting element 13 is at least partially accommodated in the component mounting hole 111. The lighting element 13 is electrically connected to the connection point 121, the connection point 121 is electrically connected to the input point 122, and the input point 122 is electrically connected to the external circuit, so that the lighting element 13 is connected to the external circuit through the connection point 121.

[0045] In some embodiments, the lighting element 13 can be completely accommodated in the element mounting hole 111 , which helps to protect and fix the lighting element 13 .

[0046] Since the element mounting hole 111 is used for mounting the lighting element 13, and the element mounting hole 111 is formed by the circumferential side wall 1112 and the distal end wall 1111, which is only open at the proximal end A and closed at the distal end B, it avoids the exposure of the light emitting surface 131 of the distal end B of the lighting element 13, and can reduce the contact probability of the lighting element 13 and the adhesive in the assembly process, thereby avoiding the image quality problem caused by the contact of the adhesive with the light emitting surface 131 of the distal end B of the lighting element 13.

[0047] It should be further pointed out that the light emitting surface 131 of the lighting element 13 not only includes the light emitting end surface of the distal end B, but also includes the light emitting side surface connected with the light emitting end surface, and the light emitting side surface is arranged in a spaced manner with the circumferential side wall 1112 of the element mounting hole 111. The setting of the distal end wall 1111 can avoid the contact of all light emitting surfaces 131 with the adhesive.

[0048] Since the conventional lighting element 13 (especially the LED light source lighting element 13) has multiple welding points, each welding point needs to be welded with a wire, and the welding point is small in size and difficult to weld, resulting in a long welding time. The long heating time in the welding process causes the lighting element 13 to change, affecting the image quality of the endoscope. The present application adopts the flexible circuit board 12, and sets the lighting element 13 on the connecting point 121 of the flexible circuit board 12, which can reduce the welding points and the welding time, avoid the influence of the long welding time on the image quality, and also can realize the quality consistency control of multiple lighting elements 13.

[0049] Please refer to Figure 4 In some embodiments, in order to improve the installation stability of the flexible circuit board 12 and the lighting element 13, the tip assembly 1 further comprises a filler 14, which is accommodated in the element mounting hole 111 through the proximal end A and covers at least part of the flexible circuit board 12. The filler 14 can be a material that can be hardened after treatment in an initial state of liquid. The flowability of the liquid can be used to fill the gap between the flexible circuit board 12 and the element mounting hole 111, and the hardening after treatment can realize the fixation of the flexible circuit board 12.

[0050] In some embodiments, the distal end surface of the filler 14 and the distal end wall 1111 of the element mounting hole 111 are arranged in a spaced manner to form an air gap, so as to avoid the contact between the filler 14 and the light emitting surface 131 of the lighting element 13, thereby further ensuring better image quality.

[0051] In some embodiments, two lighting elements 13 are provided, which can expand the lighting range and lighting brightness, ultimately improving image quality. Accordingly, two element mounting holes 111 are provided, with the lighting elements 13 and the element mounting holes 111 being arranged in a one-to-one correspondence, and the two lighting elements 13 are correspondingly placed on the flexible circuit board 12. That is, the flexible circuit board 12 is provided with two connection points 121, and the connection points 121 are connected to the lighting elements 13 in a one-to-one correspondence. Of course, in other embodiments, there are two or more lighting elements 13 and the element mounting holes 111, and the connection points 121 are connected to the lighting elements 13 in a one-to-one correspondence. The element mounting holes 111 are evenly distributed along the circumference of the head end base 11, so that the light source is uniform. In other embodiments, two or more lighting elements 13 can also be provided at each connection point 121.

[0052] In some embodiments, the front-end component 1 further includes a camera module 15, which is used to obtain an image of the target location so that the operator can view the situation of the target location.

[0053] See also Figure 5 and Figure 6 In some embodiments, a module mounting hole 112 and a clamping hole 113 are provided along the direction from the proximal end A to the distal end B on the head end base 11. The camera module 15 is at least partially mounted in the module mounting hole 112. The clamping hole 113 can be connected to a clamping tube for inserting a working device. The module mounting hole 112 and the clamping hole 113 are respectively arranged on both sides of the radial direction of the head end base 11. The two component mounting holes 111 are respectively arranged on both sides of the line connecting the midpoints of the module mounting hole 112 and the clamping hole 113, and are isolated from both the module mounting hole 112 and the clamping hole 113. When assembling the camera module 15, after it is installed in the module mounting hole 112, adhesive (such as glue) is poured from the distal end B and fixed after it hardens. Because the module mounting hole 112, the clamping hole 113, and the component mounting hole 111 are isolated from each other, this portion of the adhesive can be prevented from contacting the lighting element 13, especially the light-emitting surface 131, and the adhesive, which helps to ensure image quality. Since the module mounting hole 112 and the clamp channel hole 113 are respectively arranged on both sides of the head end seat 11, there is still a certain amount of space on both sides of the line connecting the points. Setting the component mounting hole 111 in this space can rationally utilize the overall space of the head end seat 11, help to reduce the size of the head end seat 11, so that it can be used in some narrow channels, thereby expanding the scope of use of the endoscope and the front-end component 1.

[0054] See also Figure 7 and Figure 8In some embodiments, the flexible circuit board 12 includes a main body 123, a mounting portion 124, and a connecting portion 125. The input point 122 is provided on the main body 123, the connecting point 121 is provided on the mounting portion 124, and the connecting portion 125 is provided on a side of the main body 123 and connected to the mounting portion 124. In a specific embodiment, two connecting portions 125 are provided on the side of the main body 123, each of which is provided with a mounting portion 124. The mounting portions 124 are provided with connecting points 121, thereby respectively mounting two lighting elements 13. The extending direction of the connecting portion 125 is aligned with the axial direction of the element mounting hole 111, so that the connecting portion 125 can be installed in the element mounting hole 111 with the lighting element 13. The main body 123 can be fixed on the proximal end surface A of the element mounting hole 111. The main body 123 and the mounting portion 124 generally form a "U"-shaped structure, so that it can be fixed in the element mounting hole 111, improving the stability of the installation.

[0055] In some embodiments, the connecting portion 125 has good toughness and can be bent relative to the main body 123 and the mounting portion 124, such as from Figure 7 Bend to Figure 8 , thereby helping to keep the connecting portion 125 at a preset position relative to the mounting portion 124, helping the flexible circuit board 12 to adjust according to the structure of the component mounting hole 111 in the head end seat 11, and increasing the adaptability of the flexible circuit board 12 and the component mounting hole 111. Furthermore, by bending the connecting portion 125, the distal end face of the light-emitting surface 131 of the lighting element 13 provided on the mounting portion 124 and the distal end wall 1111 of the component mounting hole 111 can also be made roughly parallel, thereby achieving better lighting quality.

[0056] See also Figure 9 In some embodiments, the transmission cable of the camera module 15 is electrically connected to the external circuit. The camera module 15 has an output end, which can be electrically connected to the input point 122 through the connecting cable 16, so that the input point 122 can be indirectly electrically connected to the external circuit through the transmission cable of the camera module 15. The flexible circuit board 12 and the camera module 15 share the same transmission cable. This design can reduce the setting of lines and solder points.

[0057] In some embodiments, the input point 122 can be directly electrically connected to the external circuit through the connecting cable 16, that is, the flexible circuit board 12 can be directly electrically connected to the external circuit through the connecting cable 16, and the camera module 15 is electrically connected to the external circuit through its transmission cable, so that the flexible circuit board 12 and the camera module 15 use different cables.

[0058] The second embodiment of the present application provides the aforementioned front-end component 11, the structure of which has been described in detail above and will not be elaborated on here.

[0059] A third embodiment of the present application provides a method for manufacturing a front-end assembly 11, for manufacturing the front-end assembly 1 as mentioned above, comprising the steps of:

[0060] providing a front-end seat 11 having a component mounting hole 111, the front-end seat 11 having an opposite proximal end A and distal end B, the component mounting hole 111 comprising a distal end wall 1111 and a circumferential side wall 1112, the circumferential side wall 1112 and the distal end wall 1111 enclosing the component mounting hole 111 which is open at the proximal end A and closed at the distal end B;

[0061] providing a flexible circuit board 12 having a connection point 121, an input point 122 and a lighting component 13;

[0062] mounting the flexible circuit board 12 into the component mounting hole 111.

[0063] In some embodiments, the flexible circuit board 12 comprises a main body portion 123, a mounting portion 124 and a connecting portion 125, the connecting portion 125 having good flexibility and capable of being bent relative to the main body portion 123 and the mounting portion 124; before mounting the flexible circuit board 12 and the lighting component 13 into the component mounting hole 111, the flexible circuit board 12 is bent so that the connecting portion 125 is kept at a preset position relative to the mounting portion 124, such as being bent from Figure 7 to Figure 8 .

[0064] In some embodiments, when mounting the flexible circuit board 12 and the lighting component 13 into the component mounting hole 111, the distal end face of the lighting component 13 is arranged in parallel with the distal end wall 1111 of the component mounting hole 111, so as to increase the effective lighting area, such as shown in Figure 4 .

[0065] In some embodiments, after mounting the flexible circuit board 12 and the lighting component 13 into the component mounting hole 111, a filler 14 is filled into the proximal end A of the component mounting hole 111, so that the filler 14 covers at least part of the flexible circuit board 12, and the distal end face of the filler 14 is spaced apart from the distal end wall 1111 of the component mounting hole 111 to form an air gap, such as shown in Figure 4 .

[0066] In an embodiment, the filler 14 and the adhesive used for assembling the camera module 15 can be the same substance, which is collectively referred to as adhesive below, and the adhesive can be hardened by physical or chemical methods, for example, by using special light illumination (such as ultraviolet light illumination).

[0067] The fourth embodiment of the present application provides a method for manufacturing an endoscope, including a method for manufacturing the aforementioned tip component 11. The method for manufacturing the tip component 11 has been described in detail above and will not be elaborated on here.

[0068] The above examples are used to illustrate the present application, which are only used to help understand the present application and are not intended to limit the present application. For those skilled in the art of the present application, based on the concept of the present application, they can also make some simple deductions, modifications or substitutions.

Claims

1. A tip assembly of an endoscope, characterized in that: include: A head end seat, the head end seat having a proximal end and a distal end disposed opposite to each other, at least one component mounting hole being provided in the head end seat, the component mounting hole comprising a distal end wall and a circumferential side wall, the circumferential side wall and the distal end wall enclosing the component mounting hole with a proximal end open; and a flexible circuit board capable of being inserted into the component mounting hole through the proximal end and at least partially accommodated in the component mounting hole; the flexible circuit board having a connection point, an input point, and a lighting element, the lighting element being at least partially accommodated in the component mounting hole and electrically connected to the connection point, the connection point being electrically connected to the input point, and the input point being electrically connected to an external circuit; The front-end component also includes a filler, which is accommodated in the component mounting hole through the proximal end and covers at least a portion of the flexible circuit board. The distal end surface of the filler and the distal end wall of the component mounting hole are spaced apart to form an air gap, thereby preventing the filler from contacting the light-emitting surface of the lighting element, thereby achieving better image quality.

2. The endoscope tip assembly according to claim 1, characterized in that There are two component mounting holes, and a module mounting hole and a clamp channel hole are provided on the head end seat in the direction from the proximal end to the distal end; the module mounting hole and the clamp channel hole are respectively arranged on both sides of the radial direction of the head end seat, and the two component mounting holes are respectively arranged on both sides of the line connecting the midpoints of the module mounting hole and the clamp channel hole, and are isolated from the module mounting hole and the clamp channel hole.

3. The endoscope tip assembly according to claim 2, characterized in that The front-end component also includes a camera module, which is at least partially installed in the module installation hole.

4. The endoscope tip assembly according to claim 3, characterized in that: The transmission cable of the camera module is electrically connected to the external circuit, and the camera module has an output end, and the output end is electrically connected to the input point through a connecting cable; or, the input point is electrically connected to the external circuit through a connecting cable.

5. The endoscope tip assembly according to claim 1, wherein: The flexible circuit board includes a main body, a mounting portion and a connecting portion. The input point is provided on the main body, the connecting point is provided on the mounting portion, and the connecting portion is provided on a side of the main body and connected to the mounting portion.

6. The endoscope tip assembly according to claim 5, characterized in that The connecting portion has good toughness and can be bent relative to the main body portion and the mounting portion.

7. An endoscope, characterized in that: A tip assembly comprising an insertion tube and an operating handle as described in any one of claims 1-6, wherein the insertion tube is used to connect the operating handle and the tip assembly, and the operating handle can control the movement and / or rotation of the tip assembly through the insertion tube.

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 seat having an element mounting hole is provided, wherein the head end seat has a proximal end and a distal end disposed opposite to each other, the element mounting hole includes a distal end wall and a circumferential side wall, and the circumferential side wall and the distal end wall enclose the element mounting hole with the proximal end open; providing a flexible circuit board having connection points, input points and lighting elements; The flexible circuit board is installed in the component installation hole.

9. The method for manufacturing the distal end assembly of an endoscope according to claim 8, wherein: The flexible circuit board includes a main body, a mounting portion, and a connecting portion, wherein the connecting portion has good toughness and can be bent relative to the main body and the mounting portion; Before installing the flexible circuit board and the lighting element into the element mounting hole, the flexible circuit board is bent so that the connecting portion is maintained at a preset position relative to the mounting portion; When the flexible circuit board and the lighting element are installed in the element installation hole, the distal end surface of the lighting element is arranged parallel to the distal end wall of the element installation hole; After the flexible circuit board and the lighting element are installed in the element mounting hole, a filler is filled from the proximal end of the element mounting hole so that the filler covers at least a portion of the flexible circuit board, and a distal end surface of the filler and a distal end wall of the element mounting hole are spaced apart to form an air gap.

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