Optical fiber connector

Abstract

The utility model provides an optical fiber connector comprising an insertion core assembly, and an insertion core in the insertion core assembly is connected with an optical cable. The first end of the first fixing shell is provided with a first fixing structure, and the second end of the first fixing shell is provided with a second fixing structure; the insertion core assembly is provided with a third fixing structure corresponding to the first fixing structure. When the first fixing shell is connected to the insertion core assembly through the first fixing structure and the third fixing structure, the first fixing shell is arranged outside the insertion core assembly in a surrounding mode. A fourth fixing structure corresponding to the second fixing structure is arranged at the first end of the second fixing shell; when the second fixing shell is connected to the first fixing shell through the second fixing structure and the fourth fixing structure, the second end of the second fixing shell is arranged outside the optical cable in a surrounding manner; and the tail sleeve is connected to the second end of the second fixing shell so as to fasten the second end of the second fixing shell on the optical cable. According to the optical fiber connector provided by the utility model, the assembly precision and the structural stability after assembly are relatively high, and the assembly efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of communication equipment, in particular to an optical fiber connector. Background Art

[0002] In the application scenario of fiber to the home, it is often necessary to penetrate a wall / protective tube. In this case, a traction cap is usually set at the head end of the fiber optic connector body. After the traction rope and the traction cap are fixed, the fiber optic connector is pulled from one end of the traction channel to the other end by pulling the traction rope to achieve the penetration of the fiber optic connector through the wall / protective tube (such as Figure 1 As shown). Depending on the building environment, the traction channel may be a linear traction channel or a non-linear traction channel. In some non-linear traction channels, the bending angle of the traction channel limits the size of the optical fiber connector body that needs to pass through the traction channel; especially when the size of the outdoor optical fiber connector body is large, it may not be able to pass through some non-linear traction channels smoothly. In addition, if a protective tube is required, due to space limitations, the inner diameter of the protective tube may be relatively small, which also causes the situation that wiring cannot be smoothly performed.

[0003] Therefore, how to reduce the size of the part of the outdoor optical fiber connector that passes through the traction channel, improve the adaptability of the outdoor optical fiber connector when passing through the wall / protective tube, and ensure the connection accuracy of the optical fiber connector has become an urgent problem to be solved. Utility Model Content

[0004] The utility model provides an optical fiber connector, which is used to improve the assembly accuracy and structural stability between a core assembly and a housing, thereby improving the assembly efficiency of the optical fiber connector.

[0005] In a first aspect, the utility model provides an optical fiber connector, including a ferrule assembly, wherein a ferrule in the ferrule assembly is connected to an optical cable; and further comprising:

[0006] A first fixing shell, a first end of which is provided with a first fixing structure, and a second end of which is provided with a second fixing structure; a third fixing structure corresponding to the first fixing structure is provided on the ferrule assembly; when the first fixing shell is connected to the ferrule assembly through the first fixing structure and the third fixing structure, the first fixing shell is arranged outside the ferrule assembly;

[0007] A second fixing shell, a first end of which is provided with a fourth fixing structure corresponding to the second fixing structure; when the second fixing shell is connected to the first fixing shell through the second fixing structure and the fourth fixing structure, the second fixing shell is arranged outside the optical cable;

[0008] The tail sleeve is connected to the second end of the second fixing shell to fasten the second end of the second fixing shell to the optical cable.

[0009] Optionally, a plurality of fastening teeth are provided at the second end of the second fixed shell, a tapered hole section is provided in the tail sleeve, and the aperture of the tapered hole section gradually decreases in the process of moving away from the sleeve interface of the tail sleeve, so that when the tail sleeve is sleeved on the second fixed shell, the fastening strength of the second fixed shell to the optical cable gradually increases with the increase of the sleeve length.

[0010] Optionally, the second fixing shell and the tail sleeve are threadedly connected.

[0011] Optionally, the optical fiber connector further comprises:

[0012] The sealing ring is sleeved on the optical cable. When the second fixing shell is connected to the first fixing shell, the sealing ring is located between the fastening teeth and the optical cable.

[0013] Optionally, the first end of the second fixing shell is provided with at least one fixing tooth, and the fourth fixing structure is provided on the fixing tooth.

[0014] Optionally, the fourth fixing structure is a fixing groove, and the second fixing structure is a fixing block corresponding to the fixing groove.

[0015] Optionally, the first fixed shell is provided with an alignment protrusion corresponding to the tooth groove of the fixed tooth, and when the alignment protrusion is embedded in the tooth groove, the second fixed structure and the fourth fixed structure are aligned along the axial direction.

[0016] Optionally, the first fixing structure is a claw, and the third fixing structure is a buckling step.

[0017] Optionally, a guide block is further provided on the insert assembly, and a guide groove extending axially is correspondingly provided on the inner wall of the first fixed shell; when the guide block is embedded in the guide groove, the first fixed structure and the third fixed structure are aligned axially.

[0018] Optionally, the head end of the plug assembly is provided with an external thread, and the external thread is used to connect the dust cap to the head end of the plug assembly; when the dust cap is connected to the head end of the plug assembly, it is enclosed outside the plug to protect the plug, and the dust cap is also suitable for connecting to a traction rope to pull the plug assembly.

[0019] The technical solution of the utility model has the following advantages:

[0020] The optical fiber connector provided by the utility model is provided with the core assembly and the housing (i.e. the first fixed housing, the second fixed housing and the tail sleeve) as an assembly, i.e. the optical fiber connector is provided with a split structure, so that when passing through a wall / protective tube, it is only necessary to pass the core assembly through the traction channel, and after passing through the traction channel, the connector housing (i.e. the first fixed housing, the second fixed housing and the tail sleeve) is assembled on site. In this way, the axial dimension of the outdoor optical fiber connector passing through the traction channel is reduced, so that it can pass through a thinner traction channel with a smaller bending angle, and the adaptability of passing through a wall / protective tube is better.

[0021] At the same time, by arranging the first fixed shell to be connected to the core assembly through the first fixed structure and the third fixed structure, the assembly accuracy between the first fixed shell and the core assembly and the structural stability after assembly can be guaranteed. At the same time, by arranging the core assembly to be enclosed when the first fixed shell is fixed on the core assembly, the assembly disturbance of the second fixed structure and the tail sleeve can be prevented. By arranging the first end of the second fixed shell to be connected to the first fixed shell through the corresponding second fixed structure and the fourth fixed structure, and the tail sleeve is connected to the second end of the second fixed shell to fasten the second end of the second fixed shell to the optical cable, the connection stability between the optical cable and the core assembly can be improved, and the stability of the first fixed shell can be improved again based on the second fixed shell. Thereby, the assembly accuracy between the core assembly, the first fixed shell, the second fixed shell and the optical cable and the structural stability after assembly are finally improved, the assembly and correction time is shortened, and the assembly efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A schematic diagram of the wall penetration method of the ferrule assembly mentioned in the background technology;

[0024] Figure 2 A schematic diagram of the structure of an optical fiber connector provided by an embodiment of the utility model;

[0025] Figure 3 Exploded view of the local structure of the optical fiber connector provided by the embodiment of the utility model; 500 is missing

[0026] Figure 4 A cross-sectional view of an optical fiber connector provided by an embodiment of the utility model;

[0027] Figure 5 A schematic structural diagram of a first fixing shell in an optical fiber connector provided by an embodiment of the utility model;

[0028] Description of reference numerals:

[0029] 1-fiber optic connector; 2-traction cap; 3-traction rope;

[0030] 100-insert assembly; 110-insert; 120-insert fixing seat; 130-spring; 140-mounting seat; 150-third fixing structure; 151-buckle step; 160-guide block;

[0031] 200-first fixed shell; 210-first fixed structure; 211-claw; 220-second fixed structure; 221-fixed block; 230-guide groove; 240-alignment protrusion;

[0032] 300-second fixing shell; 310-fourth fixing structure; 311-fixing groove; 320-fixing tooth; 330-tooth groove; 340-fastening tooth;

[0033] 400-tail sleeve; 410-conical hole section;

[0034] 500-sealing collar;

[0035] 600-Fiber Optic Cable. DETAILED DESCRIPTION

[0036] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0037] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and ratio of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangements, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present utility model. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the present invention is not limited to a specific embodiment, but extends to various modifications that still fall within the scope of the appended claims.

[0040] Furthermore, in order to provide a concise description of the exemplary embodiments, not all features of the actual embodiments (i.e., those features that are not relevant to the currently considered best mode for carrying out the present invention, or those features that are not relevant to the implementation of the present invention) may be described. Moreover, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0041] Please refer to Figure 2-Figure 5 , is a schematic diagram of the structure of the optical fiber connector provided by the embodiment of the utility model. The optical fiber connector comprises a ferrule assembly 100, a first fixing shell 200, a second fixing shell 300 and a tail sleeve 400.

[0042] The ferrule assembly 100 includes a ferrule 110 therein, and the ferrule 110 is connected to the optical cable 600 .

[0043] Figure 4 FIG. 2 shows a structure of a ferrule assembly 100 that can be used in the specific implementation of this embodiment. Figure 4As shown, the ferrule assembly 100 may include a ferrule 110, a ferrule fixing seat 120, a spring 130 and a mounting seat 140. The mounting seat 140 is a through-tube body, and its first end port is narrowed, and its inner wall near the first end has an abutting shoulder. The ferrule 110 is fixed on the ferrule fixing seat 120. The ferrule fixing seat 120 includes a first section and a second section, and the diameter of the first section is smaller than the diameter of the second section, so as to form a fixed shoulder between the first section and the second section, so that when the second section of the ferrule fixing seat 120 is placed in the mounting seat 140, the second section of the ferrule fixing seat 120 is received in the mounting seat 140 by the first end port of the mounting seat 140, and the optical fiber in the optical cable 600 is passed through the mounting seat 140 from the second end port of the mounting seat 140 and connected to the ferrule 110. One end of the spring 130 abuts against the ferrule fixing seat 120, and the other end abuts against the abutting shoulder in the mounting seat 140, so that the ferrule 110 can move axially relative to the mounting seat 140 to prevent the optical fiber connected to the ferrule 110 from breaking due to pulling.

[0044] Please refer to Figure 1-Figure 3 The first end of the first fixing shell 200 is provided with a first fixing structure 210, and the ferrule assembly 100 is provided with a third fixing structure 150 corresponding to the first fixing structure 210. When the first fixing shell 200 is connected to the ferrule assembly 100 through the first fixing structure 210 and the third fixing structure 150, the first fixing shell 200 is disposed outside the ferrule assembly 100.

[0045] Those skilled in the art should understand that the third fixing structure 150 is disposed on the peripheral component of the ferrule assembly 100. Taking the specific structure of the ferrule assembly 100 as an example, the third fixing structure 150 is disposed on the mounting seat 140, and similarly, the guide block 160 described below is also disposed on the mounting seat 140.

[0046] As an optional specific implementation of the present embodiment, in order to improve the connection convenience between the first fixed shell 200 and the core assembly 100, a snap-on connection between the first fixed shell 200 and the core assembly 100 can be set, that is, the first fixed structure 210 and the third fixed structure 150 can be set as two corresponding snap-on structures.

[0047] In a specific implementation, the first fixing structure 210 can be set as a claw 211 , and the third fixing structure 150 can be set as a corresponding buckling step 151 .

[0048] In a specific implementation, two opposite claws 211 may be provided on the first fixing shell 200 , and correspondingly, two opposite buckling steps 151 may be provided on the ferrule assembly 100 .

[0049] As an optional specific implementation of this embodiment, in order to improve the convenience of alignment between the first fixing structure 210 and the second fixing structure 220, as shown in FIG. Figure 3 and Figure 5 As shown, a guide block 160 may be provided on the ferrule assembly 100, and a guide groove 230 extending axially is correspondingly provided on the inner wall of the first fixing shell 200. When the guide block 160 is embedded in the guide groove 230, the first fixing structure 210 and the third fixing structure 150 are aligned axially.

[0050] Please refer to Figure 2-Figure 4 , the second end of the first fixing shell 200 is provided with a second fixing structure 220, and the first end of the second fixing shell 300 is provided with a fourth fixing structure 310 corresponding to the second fixing structure 220. When the second fixing shell 300 is connected to the first fixing shell 200 through the second fixing structure 220 and the fourth fixing structure 310, the second fixing shell 300 is disposed outside the optical cable 600. The tail sleeve 400 is connected to the second end of the second fixing shell 300 to fasten the second end of the second fixing shell 300 to the optical cable 600.

[0051] In order to improve the connection convenience between the second fixing shell 300 and the first fixing shell 200, the second fixing shell 300 and the first fixing shell 200 can be provided with a snap connection, that is, the second fixing structure 220 and the fourth fixing structure 310 can be provided as two corresponding snap structures.

[0052] In a specific implementation, in order to facilitate the buckling between the second fixing structure 220 and the fourth fixing structure 310, as shown in FIG. Figure 2 and Figure 3 As shown, the first end of the second fixed shell 300 may be provided with at least one fixed tooth 320, and the fourth fixed structure 310 is provided on the fixed tooth 320. At this time, the first end of the second fixed shell 300 has a certain opening amount based on the tooth groove 330 corresponding to the fixed tooth 320, which is convenient for buckling.

[0053] Those skilled in the art should understand that when there is only one fixed tooth 320 , in order to ensure the strength of the fixed tooth 320 , the circumferential width of the fixed tooth 320 should be larger, while the circumferential width of the tooth groove 330 corresponding to the fixed tooth 320 should be smaller.

[0054] In a specific implementation, in order to improve the convenience of aligning the second fixing structure 220 and the fourth fixing structure 310, as shown in FIG. Figure 3 As shown, an alignment protrusion 240 corresponding to the tooth groove 330 may be provided on the first fixed shell 200 . When the alignment protrusion 240 is embedded in the tooth groove 330 , the second fixing structure 220 and the fourth fixing structure 310 are aligned along the axial direction.

[0055] In a specific implementation, when there are two fixing teeth 320 , the two fixing teeth 320 are evenly arranged, and only one alignment protrusion 240 needs to be arranged on the first fixing shell 200 .

[0056] During specific implementation, the fourth fixing structure 310 may be configured as a fixing groove 311 , and the second fixing structure 220 may be configured as a fixing block 221 corresponding to the fixing groove 311 .

[0057] In specific implementation, in order to improve the stability of the overall structure of the optical fiber connector, such as Figure 3 As shown, the first fixed step surface of the buckling step 151 and the second fixed step surface of the fixing block 221 can be arranged to face opposite directions, so that the movement of the first fixed shell 200 in two axial directions is limited by the first fixed step surface and the second fixed step surface respectively.

[0058] In a specific implementation, in order to facilitate the first fixing shell 200 to be smoothly inserted from the end of the ferrule assembly 100 (the end of the ferrule 110) to the outside of the ferrule assembly 100, the surface of the buckling step 151 facing the end of the ferrule assembly 100 can be set as a slope surface. Correspondingly, the first fixing step surface is the surface of the buckling step 151 away from the end of the ferrule assembly 100.

[0059] In a specific implementation, when the first fixed step surface is the surface of the buckling step 151 away from the end of the ferrule assembly 100, the second fixed step surface is correspondingly the surface of the clamping block 221 facing the end of the ferrule assembly 100. At this time, in order to facilitate the buckling connection of the second fixing shell 300 to the first fixing shell 200, the surface of the clamping block 221 away from the end of the ferrule assembly 100 can be set as a slope surface.

[0060] As an optional specific implementation of this embodiment, Figure 3 and Figure 4 As shown, a plurality of fastening teeth 340 are provided at the second end of the second fixed shell 300, a tapered hole section 410 is provided in the tail sleeve 400, and the aperture of the tapered hole section 410 gradually decreases in the process of moving away from the sleeve interface of the tail sleeve 400, so that when the tail sleeve 400 is sleeved on the second fixed shell 300, the fastening strength of the second fixed shell 300 to the optical cable 600 gradually increases with the increase of the sleeve length (the sleeve length between the tail sleeve 400 and the second fixed shell 300).

[0061] In a specific implementation, in order to improve the convenience of adjusting the sleeve length between the tail sleeve 400 and the second fixed shell 300, as shown in FIG. Figure 4 As shown, the second fixing shell 300 and the tail sleeve 400 may be threadedly connected. In this case, the sleeve length can be adjusted by screwing the tail sleeve 400.

[0062] As an optional specific implementation of this embodiment, in order to improve the sealing between the second fixing shell 300 and the optical cable 600 and further improve the pulling resistance between the optical cable 600 and the second fixing shell 300, as shown in FIG. Figure 4 As shown, the optical fiber connector in this embodiment may further include a sealing ring 500, which is sleeved on the optical cable 600. When the second fixing shell 300 is connected to the first fixing shell 200, the sealing ring 500 is located between the fastening teeth 340 and the optical cable 600. The sealing ring 500 can seal the optical cable 600 and also improve the tensile strength of the optical fiber connector.

[0063] The optical fiber connector in this embodiment, when performing through-wall traction, the pulled component is the ferrule assembly 100; in specific implementation, the connection between the ferrule assembly 100 and the traction cap (which has a traction hole suitable for connecting to a traction rope) can be a snap connection; when the traction cap is a soft cap made of rubber or other materials, the traction cap can also be directly clamped on the ferrule assembly 100.

[0064] As an optional specific implementation of this embodiment, as shown in the figure, the head end of the ferrule assembly 100 can be provided with an external thread, and the dust cap can be connected to the head end of the ferrule assembly 100 based on the external thread. When the dust cap is connected to the head end of the ferrule assembly 100, it is enclosed outside the ferrule 110 to protect the ferrule 110. The dust cap is also suitable for connecting with a traction rope to pull the ferrule assembly 100. Specifically, still taking the specific structure of the ferrule assembly 100 as the aforementioned structure as an example, the external thread is also provided on the mounting seat 140.

[0065] The assembly process of the optical fiber connector in this embodiment is as follows:

[0066] First, the ferrule assembly 100 is sequentially passed through the tail sleeve 400, the sealing ring 500 and the second fixed shell 300 (at this time, the tail sleeve 400, the sealing ring 500 and the second fixed shell 300 are all sleeved on the optical cable 600), and then the ferrule assembly 100 is sleeved into the first fixed shell 200 from the second end of the first fixed shell 200 until the first fixed structure 210 and the third fixed structure 150 are connected (for example, the claw 211 and the buckle step 151 are buckled); then the second fixed shell 300 sleeved on the optical cable 600 is pushed toward the first fixed shell 200 until the second fixed structure 220 and the fourth fixed structure 310 are connected (for example, the clamping block 221 and the clamping groove 311 are buckled); then the tail sleeve 400 is connected to the second fixed shell 300. (No description about 500 is missing, 500 plays the role of sealing and enhancing tension)

[0067] In summary, the optical fiber connector in this embodiment, by arranging the core assembly 100 and the outer shell (that is, the first fixed shell 200, the second fixed shell 300 and the tail sleeve 400) as an assembly, that is, by arranging the optical fiber connector as a split structure, it is only necessary to pass the core assembly 100 through the traction channel when passing through the wall, thereby reducing the axial size of the part of the optical fiber connector passing through the traction channel, thereby enabling it to pass through a thinner traction channel with a smaller bending angle, and having better adaptability to wall / protective tubes.

[0068] At the same time, by setting the first fixed shell 200 to be connected to the ferrule assembly 100 through the first fixed structure 210 and the third fixed structure 150, the assembly accuracy between the first fixed shell 200 and the ferrule assembly 100 and the structural stability after assembly can be guaranteed. At the same time, by setting the first fixed shell 200 to be fixed on the ferrule assembly 100 so that the ferrule assembly 100 is enclosed therein, the subsequent assembly of the second fixed structure 220 and the fourth fixed structure 310, and the assembly of the tail sleeve 400 connected to the second end of the second fixed shell 300 can prevent the ferrule assembly 100 from being disturbed; by setting the first end of the second fixed shell 300 to be connected to the corresponding The second fixing structure 220 and the fourth fixing structure 310 are connected to the first fixing shell 200, and the tail sleeve 400 is provided to be connected to the second end of the second fixing shell 300 to fasten the second end of the second fixing shell 300 to the optical cable 600, which can improve the connection stability between the optical cable 600 and the ferrule assembly 100, and can also improve the stability of the first fixing shell 200 based on the fixation of the second fixing shell 300 again; thereby, the assembly accuracy between the ferrule assembly 100, the first fixing shell 200 body, the second fixing shell 300 body and the optical cable 600 and the structural stability after the overall assembly are finally improved, the assembly and correction time is shortened, and the assembly efficiency is improved.

[0069] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. An optical fiber connector, comprising a ferrule assembly (100), wherein a ferrule (110) in the ferrule assembly (100) is connected to an optical cable (600); characterized in that: Also includes: A first fixing shell (200), a first end of which is provided with a first fixing structure (210), and a second end of which is provided with a second fixing structure (220); a third fixing structure (150) corresponding to the first fixing structure (210) is provided on the ferrule assembly (100); when the first fixing shell (200) is connected to the ferrule assembly (100) through the first fixing structure (210) and the third fixing structure (150), the first fixing shell (200) is arranged outside the ferrule assembly (100); A second fixing shell (300), a first end of which is provided with a fourth fixing structure (310) corresponding to the second fixing structure (220); when the second fixing shell (300) is connected to the first fixing shell (200) via the second fixing structure (220) and the fourth fixing structure (310), the second fixing shell (300) is arranged outside the optical cable (600); The tail sleeve (400) is connected to the second end of the second fixing shell (300) to fasten the second end of the second fixing shell (300) to the optical cable (600).

2. The optical fiber connector according to claim 1, characterized in that: The second end of the second fixing shell (300) is provided with a plurality of fastening teeth (340), and the tail sleeve (400) is provided with a tapered hole section (410), and the aperture of the tapered hole section (410) gradually decreases in the process of moving away from the sleeve interface of the tail sleeve (400), so that when the tail sleeve (400) is sleeved on the second fixing shell (300) through the sleeve interface, the fastening strength of the second fixing shell (300) to the optical cable (600) gradually increases with the increase of the sleeve length.

3. The optical fiber connector according to claim 2, characterized in that: The second fixing shell (300) and the tail sleeve (400) are threadedly connected.

4. The optical fiber connector according to claim 2, characterized in that: Also includes: A sealing ring (500) is sleeved on the optical cable (600); when the second fixing shell (300) is connected to the first fixing shell (200), the sealing ring (500) is located between the fastening teeth (340) and the optical cable (600).

5. The optical fiber connector according to claim 1, characterized in that: At least one fixing tooth (320) is disposed at the first end of the second fixing shell (300), and the fourth fixing structure (310) is disposed on the fixing tooth (320).

6. The optical fiber connector according to claim 5, characterized in that: The fourth fixing structure (310) is a fixing groove (311), and the second fixing structure (220) is a fixing block (221) corresponding to the fixing groove (311).

7. The optical fiber connector according to claim 5, characterized in that: The first fixed shell (200) is provided with an alignment protrusion (240) corresponding to the tooth groove (330) of the fixed tooth (320); when the alignment protrusion (240) is embedded in the tooth groove (330), the second fixed structure (220) and the fourth fixed structure (310) are aligned along the axial direction.

8. The optical fiber connector according to claim 1, characterized in that: The first fixing structure (210) is a claw (211), and the third fixing structure (150) is a buckling step (151).

9. The optical fiber connector according to claim 1, characterized in that: The insert assembly (100) is also provided with a guide block (160), and the inner wall of the first fixed shell (200) is correspondingly provided with a guide groove (230) extending in the axial direction; when the guide block (160) is embedded in the guide groove (230), the first fixed structure (210) and the third fixed structure (150) are aligned in the axial direction.

10. The optical fiber connector according to claim 1, wherein: The head end of the ferrule assembly (100) is provided with an external thread, and the external thread is used to connect a dust cap to the head end of the ferrule assembly (100); when the dust cap is connected to the head end of the ferrule assembly (100), it is enclosed outside the ferrule (110) to protect the ferrule (110), and the dust cap is also suitable for connecting with a traction rope to tow the ferrule assembly (100).

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