Optical fiber ferrule structure

Abstract

The invention belongs to the technical field of optical fiber butt joint, and discloses an optical fiber ferrule structure. The optical fiber insertion core structure comprises an insertion core and at least one single-core optical fiber group, the insertion core is provided with a penetrating cavity and at least one rectangular cavity, and the rectangular cavity is communicated with the penetrating cavity; the at least one single-core optical fiber group and the at least one rectangular cavity are arranged in a one-to-one correspondence manner, each single-core optical fiber group comprises at least two single-core optical fibers, each single-core optical fiber comprises a connecting part and a butt joint part which are connected in sequence, in each single-core optical fiber group, all the single-core optical fibers are distributed in a matrix manner, and the connecting parts of all the single-core optical fibers are partially arranged in the penetrating cavity; and the butt joint parts of all the single-core optical fibers are limited in the rectangular cavity. Due to the fact that all the single-core optical fibers in each single-core optical fiber set are distributed in a matrix mode and limited in the rectangular cavity, due to limitation of the rectangular cavity, the positions of the single-core optical fiber sets can be accurately limited, the problem that the overall assembly precision is reduced due to assembly gaps can be solved, the influence on the alignment effect between the optical fibers is reduced, and the structure is simple.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of optical fiber butt joint, in particular to an optical fiber ferrule structure. BACKGROUND

[0002] With the continuous development of optical fiber technology, in order to adapt to the needs of high-density and high-efficiency interconnection wiring in high-speed and large-capacity optical fiber communication systems, multi-core optical fiber (MCF) emerges as the times require. There are multiple core nuclei in the cladding region of the multi-core optical fiber, thereby providing larger transmission channels.

[0003] In the related art, a plurality of single-core optical fibers are installed on a ferrule to realize one-to-one correspondence between the plurality of single-core optical fibers and the multiple core nuclei of a multi-core optical fiber, and optical path transmission is realized. Specifically, the plurality of single-core optical fibers are installed on a rotating member, and then the rotating member is inserted into the insertion hole of an MPO (Multi-fiber Push On) ferrule. The position of the plurality of single-core optical fibers in the rotating member is adjusted by rotating the rotating member, so that the plurality of single-core optical fibers are aligned with the multiple core nuclei of a multi-core optical fiber one by one, and optical path transmission is realized. However, in the implementation process of the related art, the concentricity of the inner and outer cylindrical surfaces of the rotating member and the assembly tolerance of the rotating member and the insertion hole of the ferrule have a great influence, which reduces the overall assembly precision, and further affects the alignment effect between the optical fibers. SUMMARY

[0004] The purpose of the present application is to provide an optical fiber ferrule structure, which solves the problem of reduced overall assembly precision due to assembly gap, reduces the influence on the alignment effect between the optical fibers, and has a relatively simple structure.

[0005] To achieve this purpose, the present application adopts the following technical solutions:

[0006] An optical fiber ferrule structure comprises:

[0007] A ferrule provided with a through cavity and at least one rectangular cavity, the rectangular cavity being in communication with the through cavity;

[0008] At least one group of single-core optical fiber groups is arranged one-to-one corresponding to at least one rectangular cavity. Each group of single-core optical fiber groups comprises at least two single-core optical fibers. The single-core optical fibers comprise a connection part and a butt joint part connected in sequence. In each group of single-core optical fiber groups, all the single-core optical fibers are distributed in a matrix, and the connection part of all the single-core optical fibers is arranged in the through cavity, and the butt joint part of all the single-core optical fibers is limited in the rectangular cavity.

[0009] In some possible embodiments, the ferrule is provided with at least one rectangular hole, and the rectangular hole serves as the rectangular cavity.

[0010] In some possible implementation manners, the ferrule includes a ferrule body and a surrounding member, the surrounding member is arranged on the ferrule body, and at least one of the ferrule body and the surrounding member is provided with a rectangular groove on a side close to the other to form the rectangular cavity.

[0011] In some possible implementation manners, the ferrule body is provided with the rectangular groove, the bottom surface of the surrounding member is a horizontal surface, and the rectangular groove and the bottom surface of the surrounding member form the rectangular cavity.

[0012] In some possible implementation manners, the ferrule body is provided with a placement cavity, the placement cavity is provided with the rectangular groove at a bottom wall, and the surrounding member is overlapped with a cavity wall of the placement cavity, and at least one side of the surrounding member and the cavity wall of the placement cavity form a glue containing groove.

[0013] In some possible implementation manners, the rectangular cavities are provided in at least two, the through cavities are provided in at least two, and the at least two through cavities and the at least two rectangular cavities are arranged in one-to-one correspondence, and the connection portions of all the single-core optical fibers in each group of the single-core optical fiber groups are partially limited in the through cavities.

[0014] In some possible implementation manners, the ferrule is provided with a containing groove, the containing groove is in communication with all the through cavities, and the optical fiber ferrule structure further includes a cover member, the cover member is overlapped with a groove bottom of the containing groove and covers all the through cavities.

[0015] In some possible implementation manners, the through cavities include a first cavity and a second cavity, the cover member covers the first cavity, the second cavity is in communication with the first cavity, and the second cavity is a tapered hole.

[0016] In some possible implementation manners, the outer diameter of the abutting portion is smaller than the outer diameter of the connection portion.

[0017] In some possible implementation manners, in each group of the single-core optical fiber groups, the single-core optical fibers are provided in four, the cross section of the rectangular cavity is a square, and the four single-core optical fibers are distributed in a square and limited in the rectangular cavity.

[0018] Advantages of the present application:

[0019] The optical fiber ferrule structure provided by the application comprises a ferrule and at least one single-core optical fiber group. Before each single-core optical fiber group is installed, all single-core optical fibers in each single-core optical fiber group are arranged in a matrix, and the butt joint portions of all single-core optical fibers in each single-core optical fiber group pass through the penetrating cavity and are limited in the rectangular cavity. Since all single-core optical fibers in each single-core optical fiber group are arranged in a matrix and are limited in the rectangular cavity, after the single-core optical fiber group enters the rectangular cavity, the position of the single-core optical fiber group can be accurately limited due to the limitation of the rectangular cavity, and the single-core optical fiber group as a whole cannot rotate, and the rotation of a single single-core optical fiber does not affect the alignment. In addition, the alignment accuracy of the single-core optical fiber group and the multi-core optical fiber is mainly affected by one factor of the rectangular cavity, thereby solving the problem of reduced overall assembly accuracy caused by assembly gaps, reducing the influence on the alignment effect between optical fibers, and further reducing the influence on the transmission performance during butt joint. Furthermore, by processing the rectangular cavity, the single-core optical fiber group can be constrained, and the structure is relatively simple. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 FIG. 1 is a structural schematic diagram of the optical fiber ferrule structure provided by the first embodiment of the application;

[0021] Figure 2 FIG. 2 is a first perspective structural schematic diagram of the ferrule involved in the first embodiment of the application;

[0022] Figure 3 FIG. 3 is an enlarged view of position A in FIG. 1; Figure 1

[0023] Figure 4 FIG. 4 is a structural schematic diagram of the single-core optical fiber group involved in the first and second embodiments of the application;

[0024] Figure 5 FIG. 5 is an enlarged view of position B in FIG. 1; Figure 4

[0025] Figure 6 FIG. 6 is a structural schematic diagram of the ferrule and the single-core optical fiber group involved in the first embodiment of the application;

[0026] Figure 7 FIG. 7 is a second perspective structural schematic diagram of the ferrule involved in the first embodiment of the application;

[0027] Figure 8 FIG. 8 is a structural schematic diagram of the optical fiber ferrule structure provided by the second embodiment of the application;

[0028] Figure 9 FIG. 9 is an enlarged view of position C in FIG. 8; Figure 8

[0029] Figure 10 FIG. 10 is an exploded view of the optical fiber ferrule structure provided by the second embodiment of the application;

[0030] Figure 11 ​​​is a first perspective structural schematic view of the ferrule body involved in the second embodiment of the present application;

[0031] Figure 12 is a second perspective structural schematic view of the ferrule body involved in the second embodiment of the present application;

[0032] Figure 13 is a structural schematic view of the ferrule body, the enclosing member and the single-core optical fiber group involved in the second embodiment of the present application;

[0033] Figure 14 is Figure 13 is an enlarged view of D in the middle.

[0034] in the figure:

[0035] 1, ferrule; 11, through cavity; 111, first chamber; 112, second chamber; 12, rectangular cavity; 121, tapered cavity; 122, chamfer; 13, guide pin hole; 14, accommodating groove; 141, first wall surface; 142, second wall surface;

[0036] 2, single-core optical fiber group; 21, single-core optical fiber; 211, connecting part; 212, butt joint part;

[0037] 3, cover member;

[0038] 10, ferrule body; 101, rectangular groove; 102, placement cavity; 20, enclosing member; 201, first groove; 202, inclined surface; 30, glue containing groove; 40, tapered groove. DETAILED DESCRIPTION

[0039] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference signs represent the same or similar parts or parts having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0040] In the description of the present application, unless explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0041] In the description of this invention, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0042] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0043] Example 1

[0044] like Figures 1 to 7 As shown, this embodiment provides an optical fiber ferrule structure, including a ferrule 1 and at least one set of single-core optical fiber groups 2. The ferrule 1 is provided with a penetration cavity 11 and at least one rectangular cavity 12, and the rectangular cavity 12 is connected to the penetration cavity 11. At least one set of single-core optical fiber groups 2 is arranged in a one-to-one correspondence with at least one rectangular cavity 12. Each set of single-core optical fiber groups 2 includes at least two single-core optical fibers 21. The single-core optical fiber 21 includes a connecting part 211 and a docking part 212 connected in sequence. In each set of single-core optical fiber groups 2, all single-core optical fibers 21 are arranged in a matrix, and the connecting parts 211 of all single-core optical fibers 21 are partially disposed in the penetration cavity 11, and the docking parts 212 of all single-core optical fibers 21 are confined within the rectangular cavity 12.

[0045] Before installing each group of single-core fiber optic cables 2, all the single-core fibers 21 of each group of single-core fiber optic cables 2 are arranged in a matrix. The splice portion 212 of all the single-core fibers 21 in each group of single-core fiber optic cables 2 passes through the penetration cavity 11 and is confined within the rectangular cavity 12. Since all the single-core fibers 21 in each group of single-core fiber optic cables 2 are distributed in a matrix and confined within the rectangular cavity 12, after the single-core fiber optic cable 2 enters the rectangular cavity 12, the position of the single-core fiber optic cable 2 can be accurately defined due to the constraint of the rectangular cavity 12, and the single-core fiber optic cable 2 as a whole will not rotate. The rotation of a single single-core fiber 21 does not affect the alignment. In addition, the alignment accuracy of the single-core fiber optic cable 2 and the multi-core fiber is mainly affected by the rectangular cavity 12, which can solve the problem of reduced overall assembly accuracy due to assembly gaps, reduce the impact on the alignment effect between fibers, and thus reduce the impact on transmission performance during splicing. Furthermore, by processing the rectangular cavity 12, the single-core fiber optic cable 2 can be constrained, making the structure simpler.

[0046] Optionally, the outer diameter of the abutting portion 212 is smaller than the outer diameter of the connecting portion 211. Since the size of the rectangular cavity 12 matches the size of the single-core optical fiber 21, the outer diameter of the abutting portion 212 is made smaller, the size of the rectangular cavity 12 is made smaller, and the overall size of the ferrule 1 is reduced, thereby saving space and facilitating abutting.

[0047] Optionally, in the present embodiment, each group of single-core optical fiber groups 2 has four single-core optical fibers 21, the cross section of the rectangular cavity 12 is square, and the four single-core optical fibers 21 are distributed in a square and located in the rectangular cavity 12. In this way, the application scenario in which the core of the multi-core optical fiber has four cores can be met. In other embodiments, the number of single-core optical fibers 21 can be determined according to the actual application scenario.

[0048] Optionally, the rectangular cavity 12 is provided with a tapered cavity 121 at the opening near the side of the through cavity 11. In this way, it is convenient to insert the single-core optical fiber group 2 and improve the installation convenience. Further, the opening of the tapered cavity 121 is provided with a chamfer 122. In this way, when the single-core optical fiber group 2 is inserted, the damage of the opening to the single-core optical fiber group 2 can be reduced.

[0049] Optionally, as shown in Figure 2 and Figure 7 , the ferrule 1 is provided with at least one rectangular hole, and the rectangular hole is used as the rectangular cavity 12. Through the above arrangement, the rectangular cavity 12 can be formed by machining the rectangular hole on the ferrule 1, which is convenient to form the rectangular cavity 12 and has small damage to the ferrule 1.

[0050] Optionally, the rectangular cavity 12 is provided with at least two, the through cavity 11 is provided with at least two, and the at least two through cavities 11 and the at least two rectangular cavities 12 are one-to-one corresponding. In each group of single-core optical fiber groups 2, the connecting portion 211 of all single-core optical fibers 21 is located in the through cavity 11. Through the above arrangement, the single-core optical fiber group 2 is limited in the corresponding through cavity 11, which can avoid the shaking of the single-core optical fiber group 2 in the through cavity 11. In other embodiments, the through cavity 11 is provided with one, and all the single-core optical fiber groups 2 are located in the same through cavity 11. In this way, the through cavity 11 is convenient to process.

[0051] Optionally, in order to facilitate the insertion with the plug sleeve in which the multi-core optical fiber is installed, the at least two rectangular cavities 12 are arranged at equal intervals on the ferrule 1. In order to facilitate alignment, the upper wall of the rectangular hole is parallel to the top surface of the ferrule 1. Optionally, as shown in Figure 6 and Figure 7 , the ferrule 1 is provided with a guide pin hole 13 for insertion with the guide pin of the plug sleeve.

[0052] Optionally, as shown in Figure 1 and Figure 2As shown, the ferrule 1 is provided with a receiving groove 14, which is in communication with all the through cavities 11. The ferrule structure further comprises a cover member 3, which is overlapped with the groove bottom of the receiving groove 14 and covers all the through cavities 11. In this way, glue can be poured into the through cavities 11 through the receiving groove 14, so as to fix the single-core fiber group 2 in the through cavities 11. By arranging the cover member 3, the single-core fiber group 2 can be prevented from being exposed.

[0053] Optionally, as shown in Figure 2 and Figure 7 , the through cavity 11 comprises a first cavity 111 and a second cavity 112. The cover member 3 covers the first cavity 111, the second cavity 112 is in communication with the first cavity 111, and the second cavity 112 is a tapered hole. Since the second cavity 112 is a tapered hole, it is convenient to insert the single-core fiber group 2 into the through cavity 11. In addition, the opening of the tapered hole away from the first cavity 111 side can be used as a glue pouring port. By arranging the second cavity 112 as a tapered hole, it is convenient for the glue to enter the first cavity 111. Optionally, as shown in Figure 2 , the groove bottom of the receiving groove 14 comprises a first wall surface 141 and a second wall surface 142. The first wall surface 141 is used to overlap the cover member 3, and the second wall surface 142 is used to contact the glue. The height of the second wall surface 142 is lower than that of the first wall surface 141. In this way, more glue can be accommodated, and the structure is more stable.

[0054] During installation, after the single-core fiber group 2 is inserted into the rectangular cavity 12, the position of the single-core fiber group 2 can be prevented from changing. After the single-core fiber group 2 is installed, glue can be poured into the through cavity 11 from the receiving groove 14, or glue can be poured into the through cavity 11 from the opening of the second cavity 112. The glue can fill the entire through cavity 11. After the glue solidifies, the fixation of the single-core fiber group 2 on the ferrule 1 is realized. At the same time, the cover member 3 is placed on the groove bottom of the receiving groove 14. After the glue solidifies, the fixation of the cover member 3 on the ferrule 1 is also realized.

[0055] Embodiment Two

[0056] As shown in Figure 4 , Figure 5 , Figures 8 to 14 , the embodiment provides a fiber ferrule structure, which comprises a ferrule 1 and at least one single-core fiber group 2. The main difference between the fiber ferrule structure provided by the embodiment and the embodiment one is that the structure forming the rectangular cavity 12 is different. The same structure as the embodiment one will not be described here.

[0057] Optionally, the ferrule 1 comprises a ferrule body 10 and a surrounding member 20, the surrounding member 20 is covered on the ferrule body 10, at least one of the ferrule body 10 and the surrounding member 20 is provided with a rectangular groove 101 at the side close to each other, to form a rectangular cavity 12, that is, the rectangular groove 101 can be provided at the side close to each other of the ferrule body 10 and the surrounding member 20, the rectangular grooves 101 of the two are surrounded to form the rectangular cavity 12; or the rectangular groove 101 is provided at the side of the ferrule body 10 close to the surrounding member 20, and the surrounding member 20 and the rectangular groove 101 are surrounded to form the rectangular cavity 12; or the rectangular groove 101 is provided at the side of the surrounding member 20 close to the ferrule body 10, and the surrounding member 20 and the rectangular groove 101 are surrounded to form the rectangular cavity 12. The rectangular cavity 12 is formed by machining the rectangular groove 101, when machining the rectangular groove 101, since the inner wall of the rectangular groove 101 is all exposed, it is convenient to machine the rectangular groove 101 and make it have higher machining and assembling precision. In addition, after the single-core optical fiber group 2 is installed on the rectangular groove 101, the surrounding member 20 is covered on the ferrule body 10, by providing the rectangular groove 101, it is convenient to install the single-core optical fiber group 2.

[0058] Optionally, the ferrule body 10 is provided with the rectangular groove 101, the bottom surface of the surrounding member 20 is a horizontal surface, and the rectangular groove 101 and the bottom surface of the surrounding member 20 are surrounded to form the rectangular cavity 12. In this way, it is more convenient to install the single-core optical fiber group 2. Further, the surrounding member 20 is a cuboid structure. In this way, it is convenient to machine.

[0059] In order to reduce the space occupied by the surrounding member 20 and make the overall structure of the optical fiber ferrule structure more compact, optionally, as shown in Figure 10 , the ferrule body 10 is provided with a placement cavity 102, the placement cavity 102 is recessed with a rectangular groove 101 at the bottom wall, and the surrounding member 20 is overlapped on the cavity wall of the placement cavity 102, as shown in Figure 8 , at least one side of the surrounding member 20 and the cavity wall of the placement cavity 102 are surrounded to form the glue containing groove 30. After the surrounding member 20 is overlapped on the cavity wall of the placement cavity 102, the fixation of the surrounding member 20 on the ferrule body 10 is realized by pouring glue into the glue containing groove 30. In this embodiment, the opposite sides of the surrounding member 20 and the cavity wall of the placement cavity 102 are surrounded to form the glue containing groove 30, specifically, the opposite sides of the surrounding member 20 are provided with the first recess 201, and the side wall of the placement cavity 102 is correspondingly provided with the second recess, and the first recess 201, the second recess and the bottom wall of the placement cavity 102 are surrounded to form the glue containing groove 30. In this way, the reliable connection of the surrounding member 20 and the ferrule body 10 can be realized. Further, in order to facilitate the glue to enter the glue containing groove 30, the first recess 201 is provided with an inclined surface 202. In addition, in other embodiments, one side of the opposite sides of the surrounding member 20 and the cavity wall of the placement cavity 102 can also be surrounded to form the glue containing groove 30.

[0060] In addition, as shown in Figure 13 andFigure 14 As shown, the bottom surface of the ferrule body 10 and the enclosing member 20 are provided with tapered grooves 40, and the two tapered grooves 40 enclose a tapered cavity 121, and the opening of the tapered cavity 121 is provided with a chamfer 122.

[0061] In the installation, after the single-core optical fiber group 2 is inserted into the rectangular groove 101, the position of the single-core optical fiber group 2 can be prevented from changing, after the single-core optical fiber group 2 is installed, the enclosing member 20 is pressed on the single-core optical fiber group 2, and glue is poured in the glue accommodating groove 30, after the glue solidifies, the fixing of the enclosing member 20 and the ferrule body 10 is realized. Then glue can be poured from the accommodating groove 14 to the penetrating cavity 11, or glue can be poured from the opening of the second cavity 112 to the penetrating cavity 11, so that the glue fills the entire penetrating cavity 11, after the glue solidifies, the fixing of the single-core optical fiber group 2 on the ferrule 1 is realized; at the same time, the cover member 3 is placed on the groove bottom of the accommodating groove 14, after the glue solidifies, the fixing of the cover member 3 on the ferrule 1 is also realized.

[0062] Obviously, the above embodiments of the present application are only examples for clearly illustrating the present application, and are not intended to limit the embodiments of the present application. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, all the embodiments are not required to be exhausted. Any modification, equivalent replacement and improvement, etc. within the spirit and principle of the present application should be included in the protection scope of the claims of the present application.

Claims

1. A fiber optic ferrule structure, characterized in that, include: Insert (1), the insert (1) is provided with a through cavity (11) and at least one rectangular cavity (12), the rectangular cavity (12) is connected to the through cavity (11); At least one set of single-core optical fiber groups (2) are arranged one-to-one with at least one rectangular cavity (12). Each set of single-core optical fiber groups (2) includes at least two single-core optical fibers (21). Each single-core optical fiber (21) includes a connecting part (211) and a docking part (212) connected in sequence. In each set of single-core optical fiber groups (2), all the single-core optical fibers (21) are arranged in a matrix. The connecting part (211) of all the single-core optical fibers (21) is partially disposed in the penetration cavity (11). The docking part (212) of all the single-core optical fibers (21) is confined within the rectangular cavity (12).

2. The optical fiber ferrule structure according to claim 1, characterized in that, The insert (1) is provided with at least one rectangular hole, which serves as the rectangular cavity (12).

3. The optical fiber ferrule structure according to claim 1, characterized in that, The insert (1) includes an insert body (10) and a cladding member (20), the cladding member (20) covering the insert body (10), and at least one of the insert body (10) and the cladding member (20) having a rectangular groove (101) on the side close to each other to form the rectangular cavity (12).

4. The optical fiber ferrule structure according to claim 3, characterized in that, The insert body (10) is provided with the rectangular groove (101), the bottom surface of the enclosure (20) is a horizontal plane, and the rectangular groove (101) and the bottom surface of the enclosure (20) enclose to form the rectangular cavity (12).

5. The optical fiber ferrule structure according to claim 4, characterized in that, The insert body (10) is provided with a placement cavity (102), and the placement cavity (102) has a rectangular groove (101) recessed at the bottom wall. The enclosure member (20) overlaps the cavity wall of the placement cavity (102), and at least one side of the enclosure member (20) surrounds the cavity wall of the placement cavity (102) to form a glue-containing groove (30).

6. The optical fiber ferrule structure according to any one of claims 1-5, characterized in that, At least two rectangular cavities (12) are provided, and at least two through cavities (11) are provided. At least two through cavities (11) are provided in correspondence with at least two rectangular cavities (12). In each group of single-core optical fiber groups (2), the connection portion (211) of all single-core optical fibers (21) is partially confined within the through cavity (11).

7. The optical fiber ferrule structure according to claim 6, characterized in that, The ferrule (1) is provided with a receiving groove (14), which is connected to all the penetration cavities (11). The fiber optic ferrule structure also includes a cover (3), which overlaps the bottom of the receiving groove (14) and covers all the penetration cavities (11).

8. The optical fiber ferrule structure according to claim 7, characterized in that, The through-hole (11) includes a first chamber (111) and a second chamber (112). The cover (3) covers the first chamber (111). The second chamber (112) communicates with the first chamber (111), and the second chamber (112) is a conical hole.

9. The optical fiber ferrule structure according to any one of claims 1-5, characterized in that, The outer diameter of the docking part (212) is smaller than the outer diameter of the connecting part (211).

10. The optical fiber ferrule structure according to any one of claims 1-5, characterized in that, In each group of single-core optical fiber groups (2), there are four single-core optical fibers (21), the cross-section of the rectangular cavity (12) is square, and the four single-core optical fibers (21) are distributed in a square and confined within the rectangular cavity (12).

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