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, at least one rotating piece and at least one single-core optical fiber group, the insertion core is provided with an accommodating cavity and at least one positioning cavity, and the positioning cavity is communicated with the accommodating cavity; the at least one rotating piece and the at least one positioning cavity are arranged in a one-to-one correspondence mode, the rotating piece is arranged in the containing cavity and can rotate relative to the containing cavity, and the rotating piece is provided with a penetrating cavity; the at least one single-core optical fiber group and the at least one positioning cavity are arranged in a one-to-one correspondence manner, each single-core optical fiber group comprises at least two single-core optical fibers, and in each single-core optical fiber group, all the single-core optical fibers are fixed in the penetrating cavity, and all the single-core optical fibers extend out of the rotating part and are limited in the positioning cavity. 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, the alignment requirements of the multi-core optical fibers at different angles can be met, and accurate alignment can be achieved.

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 high-capacity optical fiber communication systems, multi-core optical fiber (MCF) emerges as the times require. There are multiple cores in the cladding region of the multi-core optical fiber, thereby providing more 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 cores 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 cores of a multi-core optical fiber one by one, thereby realizing optical path transmission. 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, thereby affecting 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 can adapt to the alignment requirements of multi-core optical fibers of different angles, and facilitates the adjustment of the positions of the plurality of single-core optical fibers, and can realize more accurate alignment.

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

[0006] An optical fiber ferrule structure comprises:

[0007] A ferrule is provided with a receiving cavity and at least one positioning cavity, and the positioning cavity is in communication with the receiving cavity;

[0008] At least one rotating member is provided one-to-one corresponding to the at least one positioning cavity, and the rotating member is arranged in the receiving cavity and can rotate relative to the receiving cavity. The rotating member is provided with a through cavity.

[0009] At least one set of single-core optical fiber groups is arranged one-to-one with at least one of the positioning cavities. Each of the single-core optical fiber groups includes at least two single-core optical fibers. In each of the single-core optical fiber groups, all the single-core optical fibers are fixed in the penetrating cavity and all the single-core optical fibers extend out of the rotating member and are positioned in the positioning cavity. When the rotating member is rotated, the single-core optical fiber groups rotate.

[0010] In some possible embodiments, the positioning cavity is a circular hole.

[0011] In some possible embodiments, the positioning cavity is provided with a tapered surface near one side of the accommodating cavity.

[0012] In some possible embodiments, the penetrating cavity is provided with a first glue injection opening at an end away from the positioning cavity.

[0013] The accommodating cavity is provided with a second glue injection opening at an end away from the positioning cavity.

[0014] The plug core is provided with a glue accommodating groove in communication with the accommodating cavity. An opening of the glue accommodating groove is used as a third glue injection opening.

[0015] In some possible embodiments, the positioning cavity is provided with at least two, the accommodating cavity is provided with at least two, at least two of the accommodating cavities are arranged one-to-one with at least two of the positioning cavities, and the rotating member is positioned in the corresponding accommodating cavity.

[0016] In some possible embodiments, the rotating member includes a proximal segment and a distal segment. The proximal segment is arranged near the positioning cavity, and an outer diameter of the distal segment is greater than an outer diameter of the proximal segment.

[0017] In some possible embodiments, the accommodating cavity includes a first chamber and a second chamber. The first chamber is used to limit the position of the proximal segment. The second chamber is in communication with the first chamber. The distal segment is partially positioned in the second chamber, and all the corresponding second chambers of the distal segments are in communication.

[0018] In some possible embodiments, an end face of the proximal segment can abut against a side wall of the first chamber, and an end face of the distal segment near one end of the proximal segment can abut against a side wall of the second chamber.

[0019] In some possible embodiments, the single-core optical fiber includes a butt joint portion and a connecting portion. An outer diameter of the butt joint portion is smaller than an outer diameter of the connecting portion, and the butt joint portion is positioned in the positioning cavity.

[0020] In some possible embodiments, in each of the single-core optical fiber groups, the single-core optical fiber is provided with four, and the four single-core optical fibers are distributed in a square shape and positioned in the positioning cavity.

[0021] The beneficial effects of this invention are:

[0022] The fiber optic ferrule structure provided by this invention includes a ferrule, at least one rotating component, and at least one set of single-core fiber assemblies. When installing each set of single-core fiber assemblies, all single-core fibers of each set are arranged together and fixed within the insertion cavity. Then, the rotating component is inserted into the receiving cavity, confining the single-core fiber assemblies outside the rotating component within the positioning cavity. By rotating the rotating component, the single-core fiber assemblies rotate, aligning all single-core fibers in the single-core fiber assemblies with the multiple cores of the multi-core fiber assemblies. After alignment, the rotating component is fixed to the ferrule. Since all single-core fibers in each set of single-core fiber assemblies extend beyond the rotating component and are confined within the positioning cavity, the position of the single-core fiber assemblies is directly restricted by the positioning cavity. The alignment accuracy between the single-core fiber assemblies and the multi-core fibers is mainly affected by the positioning cavity, with less influence from the rotating component. This solves the problem of reduced overall assembly accuracy due to assembly gaps, reduces the impact on the alignment effect between fibers, and thus reduces the impact on transmission performance during splicing. The rotating component can rotate relative to the receiving cavity, allowing the single-core fiber assemblies to be located in different rotational positions, adapting to the alignment requirements of multi-core fibers at different angles. Furthermore, since the rotating component can rotate relative to the housing cavity, it is convenient to adjust the position of multiple single-core optical fibers inside the rotating component, which can more accurately position the multiple single-core optical fibers in the preset position, thereby achieving more accurate alignment. Attached Figure Description

[0023] Figure 1 This is a first-view structural schematic diagram of the optical fiber ferrule structure provided by the present invention;

[0024] Figure 2 This is a second-view structural schematic diagram of the optical fiber ferrule structure provided by the present invention;

[0025] Figure 3 yes Figure 1 Enlarged view of point A in the middle;

[0026] Figure 4 This is a schematic diagram of the structure of the rotating component involved in this invention;

[0027] Figure 5 This is a schematic diagram of the structure of the single-core optical fiber group involved in this invention;

[0028] Figure 6 yes Figure 5 Enlarged view of point B in the middle;

[0029] Figure 7 This is a first-view structural schematic diagram of the ferrule involved in the present invention;

[0030] Figure 8 This is a second-view structural schematic diagram of the ferrule involved in this invention;

[0031] Figure 9 This is a cross-sectional view of the optical fiber ferrule structure provided by the present invention;

[0032] Figure 10 This is a cross-sectional view of the rotating component involved in this invention.

[0033] In the picture:

[0034] 1. Insert; 11. Receiving cavity; 111. Second injection port; 112. First chamber; 1121. First cylindrical cavity; 1122. First conical cavity; 1123. Second cylindrical cavity; 113. Second chamber; 12. Positioning cavity; 121. Conical surface; 13. Guide pin hole; 14. Glue groove;

[0035] 2. Rotating component; 21. Through cavity; 211. First injection port; 212. Third cylindrical cavity; 213. Second conical cavity; 214. Fourth cylindrical cavity; 215. Third conical cavity; 216. Fifth cylindrical cavity; 22. Proximal section; 23. Distal section; 231. Concave and convex surfaces;

[0036] 3. Single-core fiber assembly; 31. Single-core fiber; 311. Connecting part; 312. Connecting part. Detailed Implementation

[0037] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0038] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0039] In this invention, unless otherwise explicitly 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 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 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.

[0040] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0041] like Figures 1 to 10 As shown, the present invention provides an optical fiber ferrule structure, including a ferrule 1, at least one rotating member 2, and at least one set of single-core optical fiber groups 3. The ferrule 1 has a receiving cavity 11 and at least one positioning cavity 12, the positioning cavity 12 being connected to the receiving cavity 11; at least one rotating member 2 is correspondingly arranged with at least one positioning cavity 12, the rotating member 2 is disposed in the receiving cavity 11 and can rotate relative to the receiving cavity 11, the rotating member 2 having a through-hole 21; at least one set of single-core optical fiber groups 3 is correspondingly arranged with at least one positioning cavity 12, each set of single-core optical fiber groups 3 including at least two single-core optical fibers 31, in each set of single-core optical fiber groups 3, all single-core optical fibers 31 are fixed within the through-hole 21, and all single-core optical fibers 31 extend outside the rotating member 2 and are confined within the positioning cavity 12, when the rotating member 2 is rotated, the single-core optical fiber groups 3 rotate. Optionally, as shown... Figure 1 As shown, the insert 1 is provided with a guide pin hole 13, which is used to connect with the guide pin of the insert sleeve.

[0042] When installing each group of single-core fiber optic bundles 3, all the single-core fibers 31 of each group of single-core fiber optic bundles 3 are arranged together and fixed in the insertion cavity 21. Then, the rotating component 2 is inserted into the receiving cavity 11, and the single-core fiber optic bundles 3 outside the rotating component 2 are confined within the positioning cavity 12. By rotating the rotating component 2, the single-core fiber optic bundles 3 are rotated, so that all the single-core fibers 31 in the single-core fiber optic bundles 3 are aligned with the multiple cores of the multi-core fiber. After alignment, the rotating component 2 is fixed to the ferrule 1. Since all the single-core fibers 31 in each group of single-core fiber optic bundles 3 extend outside the rotating component 2 and are confined within the positioning cavity 12, the position of the single-core fiber optic bundles 3 is directly restricted by the positioning cavity 12. The alignment accuracy of the single-core fiber optic bundles 3 and the multi-core fiber is mainly affected by the positioning cavity 12, and less affected by the rotating component 2. This solves the problem of reduced overall assembly accuracy due to assembly gaps, reduces the impact on the alignment effect between fibers, and thus reduces the impact on transmission performance during splicing. The rotating component 2 can rotate relative to the receiving cavity 11, allowing the single-core fiber group 3 to be located in different rotational positions, which can adapt to the alignment requirements of multi-core fibers at different angles. Furthermore, since the rotating component 2 can rotate relative to the receiving cavity 11, it is convenient to adjust the position of the multiple single-core fibers 31 within the rotating component 2, so that the multiple single-core fibers 31 can be more accurately located in the preset position, thereby achieving more accurate alignment.

[0043] Optionally, such as Figure 6 As shown, the single-core optical fiber 31 includes a mating portion 311 and a connecting portion 312. The outer diameter of the mating portion 311 is smaller than the outer diameter of the connecting portion 312, and the mating portion 311 is confined within the positioning cavity 12. Since the size of the positioning cavity 12 matches the size of the single-core optical fiber 31, making the outer diameter of the mating portion 311 smaller reduces the size of the positioning cavity 12, thereby reducing the overall size of the ferrule 1, saving space, and facilitating mating. Optionally, the end face of the mating portion 311 is flush with the outer wall surface of the ferrule 1 for easier mating.

[0044] Optionally, each group of single-core optical fibers 3 contains four single-core optical fibers 31, which are arranged in a square and confined within the positioning cavity 12. This arrangement satisfies application scenarios where the core of a multi-core optical fiber has four cores. The rotation angle of the single-core optical fiber group 3 is controlled by rotating the rotating component 2, so that the four single-core optical fibers 31 are arranged in a horizontal and vertical alignment. In other embodiments, the number of single-core optical fibers 31 can be determined according to the actual application scenario.

[0045] Optionally, in this embodiment, as Figure 3 and Figure 7As shown, the positioning cavity 12 is a circular hole. This design restricts the position of the single-core fiber optic assembly 3 without affecting its rotation. Optionally, the positioning cavity 12 has a tapered surface 121 on the side near the receiving cavity 11. Specifically, the positioning cavity 12 has a tapered surface 121 on the side near the first chamber 112 of the receiving cavity 11. By providing the tapered surface 121, the insertion of the single-core fiber optic assembly 3 is guided, facilitating its installation within the positioning cavity 12.

[0046] Optionally, at least two positioning cavities 12 and at least two receiving cavities 11 are provided, with at least two receiving cavities 11 corresponding to at least two positioning cavities 12, and the rotating member 2 is confined within the corresponding receiving cavity 11. This arrangement, where the rotating member 2 is confined within its corresponding receiving cavity 11, minimizes the shaking of the rotating member 2 within the receiving cavity 11 during installation, thereby preventing bending of the single-core optical fiber 31. In other embodiments, only one receiving cavity 11 is provided, and all rotating members 2 are located within the same receiving cavity 11. This arrangement facilitates the fabrication of the receiving cavity 11.

[0047] Optionally, in this embodiment, as Figure 4 As shown, the rotating component 2 includes a near segment 22 and a far segment 23. The near segment 22 is located close to the positioning cavity 12, and the outer diameter of the far segment 23 is larger than that of the near segment 22. When rotating the rotating component 2, since the outer diameter of the far segment 23 is larger than that of the near segment 22, it is easier for a person or a clamp to hold the rotating component 2, thereby realizing the rotation of the rotating component 2. In addition, it can better match the outer diameter of the single-core optical fiber 31. Optionally, the outer wall surfaces of the near segment 22 and the far segment 23 are both cylindrical surfaces. Optionally, the outer wall of the far segment 23 is provided with concave and convex surfaces 231, which is more conducive to the person or a clamp holding the rotating component 2. Specifically, there are two concave and convex surfaces 231, which are arranged opposite to each other.

[0048] Optionally, in this embodiment, as Figure 7 , Figure 8 and Figure 9 As shown, the receiving cavity 11 includes a first chamber 112 and a second chamber 113. The first chamber 112 is used to restrict the position of the proximal segment 22. The second chamber 113 communicates with the first chamber 112, and the distal segment 23 is partially located in the second chamber 113. All the second chambers 113 corresponding to the distal segment 23 are also connected. By restricting the position of the proximal segment 22 through the first chamber 112, the position of the rotating member 2 is also restricted. Since the outer diameter of the distal segment 23 is larger than the outer diameter of the proximal segment 22, connecting all the second chambers 113 corresponding to the distal segment 23 facilitates the insertion of the rotating member 2 and facilitates subsequent injection of adhesive between the multiple rotating members 2 located in the receiving cavity 11 at the opening of the receiving cavity 11 to fix the rotating member 2 in the receiving cavity 11.

[0049] Specifically, such as Figure 7 andFigure 9 As shown, the first chamber 112 includes a first cylindrical cavity 1121, a first conical cavity 1122, and a second cylindrical cavity 1123 connected in sequence. The wall of the first cylindrical cavity 1121 fits against the outer wall of the proximal segment 22, and both the first conical cavity 1122 and the second cylindrical cavity 1123 have gaps between themselves and the outer wall of the proximal segment 22. This arrangement restricts the position of the rotating member 2 while facilitating insertion into the proximal segment 22. Specifically, as... Figure 7 As shown, the adhesive reservoir 14 is connected to both the second cylindrical cavity 1123 and the second chamber 113. With this configuration, the adhesive can enter the gap between the first conical cavity 1122 and the second cylindrical cavity 1123 and the outer wall of the proximal section 22 through the adhesive reservoir 14, and the adhesive can also enter the second chamber 113, making the fixation of the rotating part 2 more secure.

[0050] Optionally, such as Figure 9 As shown, in this embodiment, the end face of the proximal segment 22 can abut against the side wall of the first chamber 112. Furthermore, the end face of the distal segment 23 near the proximal segment 22 can abut against the side wall of the second chamber 113. With the above arrangement, the axial insertion position of the rotating member 2 can be restricted when it is inserted.

[0051] Optionally, such as Figure 10 As shown, the end of the insertion cavity 21 away from the positioning cavity 12 is provided with a first glue injection port 211. After all the single-core optical fibers 31 of each group of single-core optical fiber groups 3 are arranged together and inserted into the insertion cavity 21, glue is injected into the insertion cavity 21 through the first glue injection port 211. After the glue cures, the single-core optical fiber group 3 can be fixed on the rotating part 2.

[0052] Optionally, in this embodiment, the insertion cavity 21 includes a third cylindrical cavity 212, a second conical cavity 213, a fourth cylindrical cavity 214, a third conical cavity 215, and a fifth cylindrical cavity 216 that are sequentially connected and have gradually increasing diameters. The third cylindrical cavity 212 is used to restrict the position of the single-core fiber assembly 3. Specifically, the first cylindrical cavity 1121 is used to restrict the position of the mating portion 311 of the single-core fiber 31. The second conical cavity 213, the fourth cylindrical cavity 214, the third conical cavity 215, and the fifth cylindrical cavity 216 all have gaps between them and the single-core fiber assembly 3. This arrangement restricts the position of the single-core fiber assembly 3 while facilitating its insertion. In addition, the adhesive can enter the gaps between the second conical cavity 213, the fourth cylindrical cavity 214, the third conical cavity 215, and the fifth cylindrical cavity 216 and the single-core fiber assembly 3 through the first adhesive injection port 211, making the fixation of the single-core fiber assembly 3 more secure. By setting the second conical cavity 213 and the third conical cavity 215, it is also convenient for the colloid to flow in.

[0053] Optionally, such as Figure 2As shown, the receiving cavity 11 has a second glue injection port 111 at the end away from the positioning cavity 12. After the rotating part 2 is inserted into the receiving cavity 11, glue is injected into the receiving cavity 11 through the second glue injection port 111. After the glue cures, the rotating part 2 can be fixed on the insert 1.

[0054] Optionally, the insert 1 is provided with a glue-receiving groove 14, which communicates with the receiving cavity 11. The groove of the glue-receiving groove 14 is used as a third glue injection port. In addition to injecting glue into the receiving cavity 11 through the second glue injection port 111, glue can be injected into the receiving cavity 11 through the third glue injection port to ensure a reliable connection between the rotating part 2 and the insert 1.

[0055] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A fiber ferrule structure, characterized by, The application relates to a ferrule (1) provided with a containing cavity (11) and at least one positioning cavity (12) communicating with the containing cavity (11); at least one rotating part (2) corresponding to the positioning cavity (12) is arranged in the containing cavity (11) and can rotate relative to the containing cavity (11); the rotating part (2) is provided with a penetrating cavity (21); and at least one single-core optical fiber group (3) corresponding to the positioning cavity (12) is arranged, each single-core optical fiber group (3) comprises at least two single-core optical fibers (31), all the single-core optical fibers (31) in each single-core optical fiber group (3) are fixed in the penetrating cavity (21) and all the single-core optical fibers (31) extend out of the rotating part (2) and are limited in the positioning cavity (12), and the single-core optical fiber group (3) rotates when the rotating part (2) rotates. The positioning cavity (12) is a circular hole. The positioning cavity (12) is provided with a tapered surface (121) on one side close to the containing cavity (11). The penetrating cavity (21) is provided with a first glue injection port (211) at one end away from the positioning cavity (12).

2. The fiber ferrule structure of claim 1, wherein, The containing cavity (11) is provided with a second glue injection port (111) at one end away from the positioning cavity (12).

3. The fiber ferrule structure of claim 2, wherein, The ferrule (1) is provided with a glue containing groove (14) communicating with the containing cavity (11), and the groove opening of the glue containing groove (14) is used as a third glue injection port.

4. The fiber ferrule structure of claim 1, wherein, The positioning cavity (12) is provided with at least two, the containing cavity (11) is provided with at least two, at least two containing cavities (11) and at least two positioning cavities (12) are arranged one by one, and the rotating part (2) is limited in the corresponding containing cavity (11). The rotating part (2) comprises a proximal segment (22) and a distal segment (23), the proximal segment (22) is arranged close to the positioning cavity (12), and the outer diameter of the distal segment (23) is larger than that of the proximal segment (22). The containing cavity (11) comprises a first cavity (112) and a second cavity (113), the first cavity (112) is used for limiting the position of the proximal segment (22), the second cavity (113) communicates with the first cavity (112), and the distal segment (23) is partially located in the second cavity (113) and all the corresponding second cavities (113) of the distal segments (23) communicate.

5. The fiber ferrule structure of any of claims 1-4, wherein, The end face of the proximal segment (22) can abut against the side wall of the first cavity (112), and the end face of one end of the distal segment (23) close to the proximal segment (22) can abut against the side wall of the second cavity (113).

6. The fiber ferrule structure of claim 5, wherein, The single-core optical fiber (31) comprises a butt joint part (311) and a connecting part (312), the outer diameter of the butt joint part (311) is smaller than that of the connecting part (312), and the butt joint part (311) is limited in the positioning cavity (12).

7. The fiber ferrule structure of claim 6, wherein, ​ 8. The fiber ferrule structure of claim 7, wherein, ​ 9. The fiber ferrule structure of any of claims 1-4, wherein, ​ 10. The fiber ferrule structure of any of claims 1-4, wherein, In each of the single-core optical fiber groups (3), four single-core optical fibers (31) are arranged in a square distribution and are located in the positioning cavities (12).

Images