Optical fiber connector and endoscope

Abstract

The embodiment of the utility model provides an optical fiber connector and an endoscope. The optical fiber connector is used for being connected with an adaptive light guide part, and comprises a base which is provided with a coupling interface; the optical fiber assembly is provided with an optical coupling end, and the optical coupling end is inserted into the base, penetrates out of the coupling interface and is used for being optically coupled with the adaptive light guide part; a gap is formed between the optical coupling end and the side wall of the coupling interface in a radial plane perpendicular to the axial direction of the optical coupling end, so that the radial plane can be adjusted to an expected position before the optical coupling end is fixed to the coupling interface. According to the optical fiber connector provided by the embodiment of the utility model, the luminous flux of the optical fiber assembly can be manually adjusted through the movement of the optical coupling end in the radial plane, so that the illumination uniformity index reaches the standard, the product quality is improved, and the yield of the optical fiber connector can be greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to an optical fiber connector and an endoscope having the same. Background Art

[0002] As a non-invasive imaging method, endoscopic imaging can effectively extend human vision and is widely used in imaging diagnosis and image-guided treatment in many fields such as the digestive tract, cardiovascular and cerebrovascular system, urinary system, and respiratory system, greatly improving the accuracy of disease examination. Therefore, endoscopes are increasingly used in clinical practice.

[0003] Endoscopes include laparoscopes used in laparoscopic surgery. Laparoscopic surgery is a newly developed minimally invasive method. In order for the operation to proceed normally, a clear field of vision must be guaranteed, so lighting has become one of the important indicators of laparoscope quality. The rear end of the laparoscope currently on the market uses an integrated optical fiber structure, which allows the optical fiber component to directly contact the optical cable, thereby increasing the light transmission efficiency, thereby increasing the overall light flux and improving image quality.

[0004] However, due to various dimensional tolerances, the position of the optical fiber assembly is inconsistent. Thus, when the optical fiber assembly and the optical cable are threaded together, the light flux received by each optical fiber in the optical fiber assembly is different, resulting in the inability to ensure the uniformity of the illumination of the laparoscope mirror. Utility Model Content

[0005] In order to at least partially solve the problems existing in the prior art, according to one aspect of the utility model, a fiber optic connector is provided. The fiber optic connector is used to connect with an adapting light guide, and the fiber optic connector includes: a base, on which a coupling interface is provided; and a fiber optic assembly, the fiber optic assembly having an optical coupling end, the optical coupling end being inserted into the base and passing through the coupling interface, and being used for optical coupling with the adapting light guide; wherein, there is a gap between the optical coupling end and the side wall of the coupling interface along a radial plane perpendicular to its axial direction, so that the optical coupling end can be adjusted to a desired position along the radial plane before being fixed to the coupling interface.

[0006] Exemplarily, a card slot is provided on the side wall of the coupling interface, and a card block located in the card slot is provided on the outer peripheral wall of the optical coupling end of the optical fiber assembly, and there is a gap between the card block and the card slot along the radial plane.

[0007] Exemplarily, two base protrusions are arranged on the side wall of the coupling interface and are spaced apart in the axial direction, a card slot is formed between the two base protrusions, and a notch connecting the card slot and the outside of the coupling interface is provided on the outer base protrusion of the two base protrusions close to the outside of the coupling interface, and the notch is constructed to allow the corresponding card block to pass through.

[0008] Exemplarily, the card block includes a plurality of card blocks arranged at intervals along the circumferential direction on the outer peripheral wall of the optical coupling end, and the notches are arranged in a one-to-one correspondence with the card blocks.

[0009] Exemplarily, an optical fiber protrusion is also provided on the outer peripheral wall of the optical coupling end, and the clamping block and the optical fiber protrusion clamp the outer base protrusion.

[0010] Exemplarily, the outer peripheral wall of the optical fiber protrusion is welded to the outer side wall of the outer base protrusion.

[0011] Exemplarily, a connecting portion is also provided on the side wall of the coupling interface and is located outside the outer base protrusion in the axial direction. The optical fiber connector also includes a connecting piece, one end of which is connected to the connecting portion, and the other end of the connecting piece is used to connect to the adapter light guide.

[0012] Exemplarily, the connection portion includes an internal thread, and the external thread on the connection piece is connected to the internal thread.

[0013] Exemplarily, the optical fiber assembly includes a sleeve and an optical fiber, one end of the optical fiber is inserted into the sleeve to form an optical coupling end, and a gap is formed between the sleeve and a side wall of the coupling interface in a radial plane.

[0014] According to another aspect of the utility model, an endoscope is also provided, wherein the endoscope comprises any one of the above optical fiber connectors.

[0015] The optical fiber connector provided by the embodiment of the utility model can manually adjust the light flux of the optical fiber assembly by moving the optical coupling end in the radial plane, thereby achieving the illumination uniformity index, improving the product quality, and further ensuring that the yield rate of the optical fiber connector is greatly improved. In addition, the optical fiber connector does not need to change any appearance of the current product, so it can completely replace the current product. In addition, the optical fiber connector only needs to change the internal structure of the current product, and the number of parts to be changed is relatively small.

[0016] A series of simplified concepts are introduced in the utility model content, which will be further described in detail in the detailed implementation section. The utility model content section does not mean to attempt to define the key features and essential technical features of the technical solution claimed for protection, nor does it mean to attempt to determine the scope of protection of the technical solution claimed for protection.

[0017] The advantages and features of the present invention are described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following drawings of the present invention are used as part of the present invention for understanding the present invention. The drawings show the implementation of the present invention and its description, and are used to explain the principle of the present invention. In the drawings,

[0019] Figure 1is a perspective view of an optical fiber connector according to an exemplary embodiment of the present invention, wherein the optical fiber is removed;

[0020] Figure 2 for Figure 1 A perspective view of another angle of the optical fiber connector shown in FIG.

[0021] Figure 3 for Figure 1 A top view of the optical fiber connector shown in FIG.

[0022] Figure 4 for Figure 3 AA cross-sectional view of the optical fiber connector shown in;

[0023] Figure 5 for Figure 3 BB cross-sectional view of the optical fiber connector shown in;

[0024] Figure 6 for Figure 1 A cross-sectional view of a fiber optic connector shown in FIG. 1 , wherein the optical fiber is schematically shown;

[0025] Figure 7 for Figure 1 A perspective view of the base shown in FIG.

[0026] Figure 8 for Figure 7 A top view of the optical fiber connector shown in FIG.

[0027] Fig. 9 for Figure 8 CC cross-sectional view of the optical fiber connector shown in;

[0028] Fig.10 for Figure 8 DD cross-sectional view of the optical fiber connector shown in;

[0029] Fig.11 for Figure 1 A perspective view of the sleeve shown in FIG.

[0030] Fig.12 for Fig.11 A cross-sectional view of the sleeve is shown in FIG.

[0031] The above drawings include the following reference numerals:

[0032] 100, base; 110, coupling interface; 111, gap; 120, insertion interface; 130, transmission interface; 140, slot; 150, outer base protrusion; 151, inner wall; 152, outer wall; 160, notch; 170, connecting part; 180, insertion gap; 190, inner base protrusion; 200, optical fiber assembly; 210, optical coupling end; 220, block; 230, optical fiber protrusion; 240, sleeve; 250, optical fiber; 251, input surface. DETAILED DESCRIPTION

[0033] In the following description, a large number of details are provided so that the present invention can be thoroughly understood. However, it will be appreciated by those skilled in the art that the following description only illustrates preferred embodiments of the present invention, and the present invention can be implemented without one or more of such details. In addition, in order to avoid confusion with the present invention, some technical features known in the art are not described in detail.

[0034] According to one aspect of the utility model, a fiber optic connector is provided. The fiber optic connector can be applied to any suitable endoscope, including but not limited to a laparoscope or a thoracoscopic device. Therefore, according to another aspect of the utility model, an endoscope is also provided. The fiber optic connector and the endoscope of the embodiment of the utility model will be described in detail below in conjunction with the accompanying drawings.

[0035] like Figure 1-12 As shown, the fiber optic connector may include a base 100 and a fiber optic assembly 200 .

[0036] The optical fiber connector can be used to connect with the adapting light guide. The adapting light guide can include any suitable light-guiding component, including but not limited to an optical cable or a lens barrel with a lens group installed.

[0037] The base 100 may be provided with a coupling interface 110 .

[0038] The optical fiber assembly 200 may have an optical coupling end 210. The optical coupling end 210 may be inserted into the base 100 and pass through the coupling interface 110. In this way, the optical coupling end 210 may be used for optical coupling with the adapting light guide. In this way, the adapting light guide and the optical coupling end 210 may achieve optical conduction. In some embodiments, the other end of the adapting light guide may be connected to an illumination device. In this way, the illumination light generated by the illumination device may be transmitted to the optical fiber assembly 200 through the adapting light guide. The optical fiber assembly 200 may also have an optical output end disposed opposite to the optical coupling end 210. The optical output end may be connected to the distal end of the endoscope to illuminate the object being observed.

[0039] Among them, along the axial direction ZZ of the optical coupling end 210, the optical coupling end 210 can be fixed relative to the position of the coupling interface 110 by any suitable means such as snap-on. If necessary, along the axial direction ZZ of the optical coupling end 210, the optical coupling end 210 can also be not fixed relative to the position of the coupling interface 110, so that it can move relatively. Moreover, in a radial plane perpendicular to the axial direction ZZ, there can be a gap 111 between the optical coupling end 210 and the side wall of the coupling interface 110. Due to the gap 111, the optical coupling end 210 can be adjusted to a desired position along the radial plane before being fixed to the coupling interface 110. In order to show the radial plane, in Figure 1 2 shows two mutually perpendicular transverse directions XX and longitudinal directions YY in the radial plane. That is, the plane where the transverse direction XX and longitudinal direction YY are located is the radial plane. The plane where the radial direction is located is defined as the radial plane, and the transverse direction XX and longitudinal direction YY are both radial directions of the optical coupling end 210. The axial direction ZZ, the transverse direction XX and the longitudinal direction YY may be perpendicular to each other.

[0040] In practical applications, the optical coupling end 210 can be fixed to the coupling interface 110 along the axial direction ZZ. In this way, the optical coupling end 210 and the coupling interface 110 can be pre-fixed to prevent the optical coupling end 210 from being separated from the coupling interface 110. After the light guide portion is optically coupled to the optical coupling end 210, the optical fiber connector can be tested. If the illumination uniformity of the light transmitted by the optical fiber assembly 200 is poor, it means that the position of the optical fiber assembly 200 in the radial plane needs to be adjusted. When the relevant personnel adjust the position of the optical coupling end 210 in the radial plane until the illumination uniformity is good, the optical coupling end 210 is located at the expected position. Then, the optical coupling end 210 can be completely fixed to the coupling interface 110 by any suitable method such as welding or bonding to ensure that the optical coupling end 210 is always in the expected position. In this way, in the subsequent use process, after the light guide portion is optically coupled to the optical coupling end 210, the illumination uniformity of the light transmitted by the optical fiber assembly 200 is always good, and the user (such as a clinician) has a good experience.

[0041] In summary, the optical fiber connector provided in the embodiment of the utility model can manually adjust the luminous flux of the optical fiber assembly 200 by moving the optical coupling end 210 in the radial plane, so as to achieve the illumination uniformity index, improve the product quality, and further ensure that the yield rate of the optical fiber connector is greatly improved. In addition, the optical fiber connector does not need to change any appearance of the current product, so it can completely replace the current product. In addition, the optical fiber connector only needs to change the internal structure of the current product, and the number of parts changed is relatively small. The endoscope using the optical fiber connector can ensure that the overall luminous flux and illumination uniformity of the endoscope mirror are good.

[0042] It should be noted that the present invention is not limited to the above embodiments, and more variations and modifications can be made according to the teachings of the present invention, and these variations and modifications are within the scope of protection claimed by the present invention. For example, the position of the optical cable of the light guide can be adjusted by the above structure to achieve the above effect.

[0043] There may be a variety of ways for relevant personnel to adjust the position of the optical coupling end 210 in the radial plane. In some embodiments, the position of the optical coupling end 210 in the radial plane can be adjusted by filling a filler such as rubber between the optical coupling end 210 and the coupling interface 110. In some embodiments, a tooling assembly can be installed on the base 100. The tooling assembly may include a fixing member and an adjusting member. The fixing member may be fixed to any suitable position on the base 100, such as fixed to the coupling interface 110. The adjusting member may move relative to the fixing member. The adjusting member includes but is not limited to a screw. Relevant personnel may control the movement of the adjusting member so that the adjusting member can abut against the optical coupling end 210, thereby moving the optical coupling end 210 to the desired position in the radial plane. After the optical coupling end 210 is completely fixed to the coupling interface 110, the tooling assembly may be removed and replaced with a corresponding appearance member.

[0044] Exemplarily, a card slot 140 may be provided on the side wall of the coupling interface 110. A card block 220 may be provided on the outer peripheral wall of the optical coupling end 210. The card block 220 may be located in the card slot 140. Exemplarily, the card block 220 may be fixed to the card slot 140 along the axial direction ZZ. In this way, along the axial direction ZZ, the optical coupling end 210 may be fixed to the coupling interface 110. In addition, the card block 220 may have a gap 111 with the card slot 140 along the radial plane. In this way, relevant personnel can adjust the position of the optical coupling end 210 in the radial plane. With such a configuration, the structure of the connection between the coupling interface 110 and the optical coupling end 210 is relatively simple and convenient for processing and manufacturing.

[0045] Exemplarily, two base protrusions may be provided on the side wall of the coupling interface 110. The two base protrusions may be spaced apart along the axial direction ZZ. A card slot 140 may be formed between the two base protrusions along the axial direction ZZ. Among them, the two base protrusions closer to the outside of the coupling interface 110 may be an outer base protrusion 150; and the two base protrusions closer to the inside of the coupling interface 110 may be an inner base protrusion 190. Taking the outer base protrusion 150 as an example, it may have an inner side wall 151 and an outer side wall 152 that are oppositely arranged. The inner side wall 151 of the outer base protrusion 150 may be configured as a groove side wall of the card slot 140. The outer base protrusion 150 may be configured as an integral annular protrusion, or may be configured as a plurality of protrusions spaced apart along the circumferential direction of the card slot 140. Similarly, the inner base protrusion 190 can be constructed as an integral annular protrusion, or can be constructed as a plurality of protrusions spaced apart along the circumferential direction of the slot 140 .

[0046] A notch 160 may be provided on the outer base protrusion 150. The notch 160 may be connected between the card slot 140 and the outside of the coupling interface 110. The notch 160 may be configured to allow the corresponding card block 220 to pass through. That is, along the circumferential direction of the card slot 140, the length of the notch 160 may be greater than the length of the corresponding card block 220. Along the radial direction of the card slot 140, the length of the notch 160 may be greater than the length of the corresponding card block 220. When the coupling interface 110 and the optical coupling end 210 need to be connected, the card block 220 may be passed through the corresponding notch 160, so that the card block 220 may be moved into the card slot 140. Then the optical coupling end 210 may be rotated by a certain angle, such as 5 degrees, so that the card block 220 and the notch 160 may be staggered. In this way, the card block 220 may be located in the card slot 140 along the axial direction ZZ. Conversely, the optical coupling end 210 can be rotated so that the block 220 is aligned with the corresponding notch 160, and then the block 220 can be passed through the corresponding notch 160, so that the block 220 can be separated from the slot 140. In this way, the coupling interface 110 and the optical coupling end 210 can be easily connected and disassembled.

[0047] Exemplarily, the card block 220 may include a plurality of, for example, two, three or four as shown in the figure. A plurality of card blocks 220 may be arranged along the circumferential direction of the card slot 140. The structures of the card blocks 220 may be the same or different. The notches 160 and the card blocks 220 may be arranged in a one-to-one correspondence. With such an arrangement, the card slot 140 and the card block 220 may be connected at multiple positions, thereby improving the strength of the connection between the two and the uniformity of the force, and ensuring a better connection effect between the coupling interface 110 and the optical coupling end 210.

[0048] Exemplarily, an optical fiber protrusion 230 may also be provided on the outer peripheral wall of the optical coupling end 210. The optical fiber protrusion 230 may be constructed as an integral annular protrusion, or may be constructed as a plurality of protrusions spaced apart along the circumferential direction of the optical coupling end 210. The optical fiber protrusion 230 may be located outside the block 220 along the axial direction ZZ. The block 220 and the optical fiber protrusion 230 may clamp the outer base protrusion 150. In other words, the block 220 may abut against the inner side wall 151 of the outer base protrusion 150; and the optical fiber protrusion 230 may abut against the outer side wall 152 of the outer base protrusion 150. In this way, the outer base protrusion 150 may be clamped between the block 220 and the optical fiber protrusion 230 along the axial direction ZZ, and the coupling interface 110 and the optical coupling end 210 may be relatively fixed, resulting in a better connection effect.

[0049] Exemplarily, the outer peripheral wall of the optical fiber protrusion 230 can be welded to the outer side wall 152 of the outer base protrusion 150. The welding includes but is not limited to intermittent welding or continuous welding. In some embodiments, after the optical coupling end 210 moves to the expected position, several welding points can be welded between the outer peripheral wall of the optical fiber protrusion 230 and the outer side wall 152 of the outer base protrusion 150 to ensure that the coupling interface 110 and the optical coupling end 210 are fixed, and then continuous welding is performed to ensure that the connection strength between the coupling interface 110 and the optical coupling end 210 meets the requirements. The welding points can play a fixing role, thereby ensuring that the optical coupling end 210 located at the expected position can be completely fixed to the coupling interface 110, and then ensuring that the illumination uniformity index meets the standard.

[0050] Exemplarily, a connecting portion 170 may also be provided on the side wall of the coupling interface 110. The connecting portion 170 may be located outside the outer base protrusion 150 along the axial direction ZZ. The optical fiber connector may also include a connector (not shown). One end of the connector may be connected to the connecting portion 170 by any suitable means such as plugging. The other end of the connector may be used to connect to the adapter light guide. Part of the connector may be the above-mentioned appearance part. The connector may be an integral structure or a structure formed by connecting multiple parts. With such a configuration, the adapter light guide may be relatively fixed to the coupling interface 110 to facilitate optical coupling with the optical coupling end 210.

[0051] In the embodiment where the optical fiber protrusion 230 is disposed on the outer peripheral wall of the optical coupling end 210, the connecting portion 170 may surround the optical fiber protrusion 230, so that an insertion gap 180 may be provided between the connecting portion 170 and the optical fiber protrusion 230. One end of the connecting member may be inserted into the insertion gap 180 and connected to the connecting portion 170. The insertion gap 180 may also be used to provide an operating space for welding the outer peripheral wall of the optical fiber protrusion 230 to the outer side wall 152 of the outer base protrusion 150.

[0052] Exemplarily, the connection portion 170 may include an internal thread. The connection piece may be provided with an external thread. The external thread may be threadedly connected to the internal thread. In this way, the connection piece and the coupling interface 110 may be easily connected and disassembled.

[0053] Exemplarily, the optical fiber assembly 200 may include a sleeve 240 and an optical fiber 250. The number of optical fibers 250 may be arbitrary. One end of the optical fiber 250 may be plugged into the sleeve 240, so that it may be configured as an optical coupling end 210. In this way, the end face of one end of the optical fiber 250 inserted into the sleeve 240 may be an input face 251. The input face 251 may be coupled with an adapting light guide. The adapting light guide may transmit light to the input face 251, so that light may be transmitted through the optical fiber 250. The other end of the optical fiber 250 may be connected to the distal end of the endoscope. The sleeve 240 may be fixed or not fixed relative to the position of the coupling interface 110 along the axial direction ZZ. Furthermore, the sleeve 240 may have a gap 111 with the side wall of the coupling interface 110 in the radial plane. The above-mentioned block 220 and the optical fiber protrusion 230 may be arranged on the outer peripheral wall of the sleeve 240. The relevant personnel can apply force to the sleeve 240 through the above-mentioned tooling assembly, so as to adjust the position of one end of the optical fiber 250, thereby ensuring that the optical coupling end 210 moves to the expected position in the radial plane. The structure of the optical fiber assembly 200 is relatively simple, and the sleeve 240 can protect the optical fiber 250.

[0054] Exemplarily, the base 100 can be a three-way piece. That is, the base 100 can also be provided with an insertion portion interface 120 and a transmission interface 130. The coupling interface 110, the insertion portion interface 120 and the transmission interface 130 can be interconnected. The insertion portion interface 120 can be used to connect to the insertion portion of the endoscope. The light output end of the optical fiber assembly 200 can be inserted into the base 100 and pass through the insertion portion interface 120. The transmission interface 130 can be used to connect any suitable device such as an optical bayonet, a camera handle, etc.

[0055] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front", "back", "up", "down", "left", "right", "lateral", "vertical", "vertical", "horizontal", "top", "bottom", etc. are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present invention; the directional words "inside" and "outside" refer to the inside and outside relative to the contours of each component itself.

[0056] For ease of description, regional relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the regional positional relationship between one or more components or features shown in the figure and other components or features. It should be understood that regional relative terms include not only the orientation of the components as described in the figure, but also different orientations in use or operation. For example, if the components in the accompanying drawings are inverted as a whole, the components "above other components or features" or "above other components or features" will include the situation where the components are "below other components or structures" or "below other components or structures". Therefore, the exemplary term "above" may include both "above" and "below". In addition, these components or features may also be positioned at other different angles (e.g., rotated 90 degrees or other angles), and this article is intended to include all of these situations.

[0057] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, parts, components and / or combinations thereof.

[0058] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0059] The utility model has been described through the above embodiments, but it should be understood that the above embodiments are only for the purpose of example and description, and are not intended to limit the utility model to the scope of the described embodiments. In addition, it can be understood by those skilled in the art that the utility model is not limited to the above embodiments, and more variations and modifications can be made according to the teachings of the utility model, and these variations and modifications all fall within the scope of protection claimed by the utility model. The protection scope of the utility model is defined by the attached claims and their equivalents.

Claims

1. An optical fiber connector for connecting to an adaptor light guide, characterized in that: include: A base, wherein a coupling interface is provided on the base; as well as An optical fiber assembly, the optical fiber assembly having an optical coupling end, the optical coupling end being inserted into the base and passing through the coupling interface for optical coupling with the adapting light guide; There is a gap between the optical coupling end and the side wall of the coupling interface along a radial plane perpendicular to the axial direction thereof, so that the optical coupling end can be adjusted to a desired position along the radial plane before being fixed to the coupling interface.

2. The optical fiber connector according to claim 1, wherein: A card slot is arranged on the side wall of the coupling interface, and a card block located in the card slot is arranged on the outer peripheral wall of the optical coupling end of the optical fiber assembly, and the card block has the gap with the card slot along the radial plane.

3. The optical fiber connector according to claim 2, wherein: Two base protrusions spaced apart along the axial direction are provided on the side wall of the coupling interface, the card slot is formed between the two base protrusions, and a notch connecting the card slot and the outside of the coupling interface is provided on the outer base protrusion of the two base protrusions close to the outside of the coupling interface, and the notch is constructed to allow the corresponding card block to pass through.

4. The optical fiber connector according to claim 3, wherein: The card blocks include a plurality of card blocks arranged at intervals along the circumferential direction on the outer peripheral wall of the optical coupling end, and the notches are arranged in a one-to-one correspondence with the card blocks.

5. The optical fiber connector according to claim 3, wherein: An optical fiber protrusion is also provided on the outer peripheral wall of the optical coupling end and is located outside the clamping block along the axial direction. The clamping block and the optical fiber protrusion clamp the outer base protrusion.

6. The optical fiber connector according to claim 5, characterized in that: The outer peripheral wall of the optical fiber protrusion is welded to the outer side wall of the outer base protrusion.

7. The optical fiber connector according to claim 5, characterized in that: A connecting portion is also provided on the side wall of the coupling interface and is located outside the outer base protrusion along the axial direction. The optical fiber connector also includes a connecting piece, one end of which is connected to the connecting portion, and the other end of the connecting piece is used to connect to the adapter light guide.

8. The optical fiber connector according to claim 7, wherein: The connecting portion includes an internal thread, and the external thread on the connecting member is connected to the internal thread.

9. The optical fiber connector according to claim 1, wherein: The optical fiber assembly includes a sleeve and an optical fiber. One end of the optical fiber is inserted into the sleeve to form the optical coupling end. The sleeve has the gap between the sleeve and the side wall of the coupling interface in the radial plane.

10. An endoscope, characterized in that: The optical fiber connector comprises the optical fiber connector as claimed in any one of claims 1 to 9.

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