MPO optical cable structure
By installing a cutting blade on the bushing, the problem of insufficient tensile strength of MPO optical cable was solved, a stronger connection between the outer sheath and the core was achieved, and the tensile performance of the optical cable was improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-12
- Publication Date
- 2026-03-13
AI Technical Summary
The existing MPO optical cable has insufficient tensile strength, mainly due to the limited bonding strength between the adhesive and the outer sheath, resulting in poor tensile performance of the optical cable and the rear section of the MPO inner shell.
A cutting blade is installed on the bushing. The blade cuts and opens the end of the outer sheath, forming a connection with the wire core and the external glue injection space. Glue is injected through the glue injection hole to enhance the fixing strength between the outer sheath and the wire core.
It improves the tensile strength of the optical cable structure, enhances the connection strength between the outer sheath and the core, and forms a stronger tensile structure.
Smart Images
Figure CN223992993U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of optical fiber connection technology, and in particular to an MPO optical cable structure. Background Technology
[0002] MPO optical cable is a high-density multi-fiber connector cable, characterized by high density, multi-rate fast connection and easy installation. It is mainly used for short-distance connection between point-to-point optical modules, especially in the interconnection of computing power clusters. MPO optical cable includes optical cable and connectors at both ends of optical cable. The connectors are used to plug and connect with optical modules.
[0003] refer to Figure 9 , Figure 10 The patent application, number 2023220604121, entitled "A Structural Diagram of an MPO Connector," includes a housing 1, a ferrule assembly 2, a spring 3, a spring support frame 4, an MPO inner shell rear section 8, and a bushing 9. The front end of the MPO inner shell rear section 8 is connected to the spring support. The MPO inner shell rear section 8 has a through hole, and the bushing 9 is disposed within the through hole. It also has an injection hole 11. The bushing includes a straight section, a stepped structure, and a boss. After the bushing is disposed within the through hole, a cavity 21 can be formed on the outer circumferential surface of the optical cable and the inner circumferential surface of the through hole. An injection hole is provided on the MPO inner shell rear section 8. After injecting glue into the cavity through the injection hole, the MPO inner shell rear section 8 and the outer layer of the optical cable can be connected to form a tensile structure. The tensile structure eliminates the metal crimping part and crimping action, and replaces it with a plastic injection molded part, which helps to reduce costs.
[0004] However, in actual applications, after the optical cable is inserted into the cavity 21, the outer sheath of the optical cable is fitted onto the inclined section 20 of the bushing 9. After the outer sheath and the inclined section are guided and matched, they are in contact with the outer circumferential surface of the inclined section. Therefore, when applying adhesive, the adhesive will only adhere to the outer surface of the outer sheath. Furthermore, since the length of the outer sheath extending into the cavity 21 is limited, the connection strength between the adhesive and the outer sheath is limited. As a result, the tensile strength between the optical cable and the rear section 8 of the MPO inner shell is limited and needs to be improved. Utility Model Content
[0005] The purpose of this invention is to solve the above-mentioned problems by providing an MPO optical cable structure.
[0006] To achieve the above objectives, the technical solution of this utility model is as follows: an MPO optical cable structure, including an MPO inner shell and a bushing that is inserted into the MPO inner shell. The bushing includes a column and a guide section disposed at the end of the column. The guide section is a conical surface coaxially disposed with the column. Along the axial direction of the bushing, at least one cutting edge is disposed on the outer circumferential surface of the bushing. The cutting edge of the cutting edge includes a parallel section and a connecting section. The parallel section is disposed in the area where the column and the guide section connect. One end of the connecting section is connected to the guide section, and the other end is connected to the end of the parallel section.
[0007] Furthermore, the inner circumferential surface of the MPO inner shell is provided with abutment plate groups corresponding to the blade plates one by one. The abutment plate groups include two abutment plates spaced apart, and the abutment plates extend along the axial direction of the MPO inner shell.
[0008] Furthermore, the two abutting plates are arranged parallel to each other on their closest sides, and the distance between the first surfaces of the two abutting plates that are close to each other is greater than the thickness of the blade plate.
[0009] Furthermore, an exhaust port communicating with the atmosphere is provided on the side wall of the MPO inner shell located between the two first surfaces.
[0010] Furthermore, the side of the abutment plate near the axis of the MPO inner shell is arranged parallel to the axis of the MPO inner shell.
[0011] Furthermore, the side of the abutment plate near the axis of the MPO inner shell is provided with at least one connecting channel, and the two ends of the connecting channel pass through the first surface of the abutment plate and the side opposite to the first surface.
[0012] Furthermore, the blade includes two blades, which are symmetrically arranged about the axis of the bushing.
[0013] Furthermore, when the bushing is inserted into the inner shell of the MPO, the trajectory of the parallel segment moving around the axis is a circular surface, which intersects with the abutment plate.
[0014] The MPO optical cable structure disclosed in this utility model has the following advantages compared with the prior art: By setting a cutting blade on the bushing, when the bushing and the MPO inner shell are installed in place, the end of the outer sheath can be cut and spread open by the cutting blade, which can make the core and the outer sheath connected with the external glue injection space. Then, glue is injected through the glue injection hole, which can make the glue enter between the outer sheath and the core, thereby improving the fixing strength of the outer sheath. Compared with the prior art, the tensile strength of the formed tensile structure is stronger, thus improving the tensile performance of the optical cable structure. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the MPO inner shell and bushing assembly in an MPO optical cable structure according to the present invention.
[0016] Figure 2 This is a schematic diagram of the bushing structure in an MPO optical cable structure according to the present invention.
[0017] Figure 3 This is a schematic diagram of the end face structure of the MPO inner shell in an MPO optical cable structure according to the present invention.
[0018] Figure 4 This is a cross-sectional schematic diagram of the MPO inner shell in an MPO optical cable structure according to the present invention.
[0019] Figure 5 This is a cross-sectional structural diagram of the bushing in an MPO optical cable structure according to the present invention.
[0020] Figure 6 for Figure 5 The diagram shows a cross-sectional view of the bushing at point AA in an MPO optical cable structure according to this invention.
[0021] Figure 7 This is a schematic diagram of the mating structure of the MPO inner shell and bushing in an MPO optical cable structure according to this utility model. Figure 1 .
[0022] Figure 8 This is a schematic diagram of the mating structure of the MPO inner shell and bushing in an MPO optical cable structure according to this utility model. Figure 2 .
[0023] Figure 9 This is a schematic diagram of the overall structure of an MPO optical cable in the prior art.
[0024] Figure 10 This is a schematic diagram of the cross-sectional structure of the MPO inner shell rear end and bushing in the existing MPO optical cable structure.
[0025] In the diagram: 14. Outer sheath; 24. Core wire; 8. MPO inner shell; 81. Injection hole; 82. Vent hole; 83. Snap-fit arm; 84. Abutment plate; 840. Connecting groove; 86. Limiting groove; 87. Sealing surface; 9. Bushing; 90. Column; 901. Internal channel; 902. Guide section; 92. Blade plate; 920. Guide slope; 921. Parallel section; 922. Connecting section; 93. Limiting boss; 94. Mating conical surface. Detailed Implementation
[0026] The present invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.
[0027] refer to Figures 1-5This application provides a schematic diagram of a multi-rate MPO optical cable structure. As a specific embodiment, its specific structure is as follows: An MPO optical cable structure includes an MPO inner shell 8 and a bushing 9 that is inserted and fitted with the MPO inner shell 8. The bushing 9 includes a column 90 and a guide section 902 disposed at the end of the column 90. The guide section 902 is a conical surface coaxially disposed with the column 90. Along the axial direction of the bushing 9, at least one cutting edge 92 is disposed on the outer peripheral surface of the bushing 9. The cutting edge of the cutting edge 92 includes a parallel section 921 and a connecting section 922. The parallel section 921 is disposed in the area where the column 90 and the guide section 902 are connected. One end of the connecting section 922 is connected to the guide section 902, and the other end is connected to the end of the parallel section 921.
[0028] Specifically, it should be noted that the optical cable structure in this application is largely the same as that in the background art. The improvement lies in the modification of the MPO inner shell 8 and the bushing 9. The MPO inner shell 8 includes a rear cylindrical structure and a snap-fit arm 83, which can snap into the outer shell. The end of the MPO inner shell 8 is provided with a conical sealing surface 87, and the bushing 9 is provided with a mating conical surface 94 that abuts against the sealing surface 87 for a sealing fit. When the bushing 9 is inserted into the MPO inner shell 8, the two abut against each other for a sealing fit. The bushing 9 includes a column 90, the end of which is provided with a conical guide slope 920, and the other end is provided with a mating slope and a limiting boss 93. The end of the MPO inner shell 8 is provided with a limiting groove 86. When the bushing 9 is inserted into the MPO inner shell 8, the limiting boss 93 is located in the limiting groove 86. (Refer to...) Figure 2 At least one blade 92 is provided on the outer peripheral surface of the bushing 9. The blade 92 includes a parallel section 921 parallel to the axis of the bushing 9 and a connecting end connecting the parallel section 921 and the guide slope 920. An internal channel 901 is provided inside the bushing 9 for the optical cable core 24 to pass through. (Refer to...) Figure 7 , Figure 8 When assembling the optical cable with the MPO connector, the core 24 is passed through the internal channel 901, and the outer sheath 14 is inserted into the inner shell 8 of the MPO by a certain distance. Then the bushing 9 is... Figure 7 As shown by the arrow, the bushing 9 is installed in the direction indicated. During this process, the tip of the guide section 902 of the bushing 9 first extends between the outer sheath 14 and the wire core 24. As the bushing 9 continues to extend in the direction of the arrow, the connecting end of the outer sheath 14 and the blade 92 coincides. The connecting section 922 of the blade 92 can cut the outer sheath 14. As the bushing 9 continues to move, the blade 92 can open up the outer sheath 14 until the bushing 9 extends into... Figure 8As shown, the cable is installed in place. The blade 92 can then cut and open a section of the outer sheath 14, allowing the core 24 and the outer sheath 14 to communicate with the external glue injection space. Glue is then injected through the glue injection hole 81, allowing the glue to enter between the outer sheath 14 and the core 24, thereby increasing the fixing strength of the outer sheath 14. Compared with existing technologies, this results in a stronger tensile structure and improves the tensile performance of the optical cable structure.
[0029] Furthermore, as a specific implementation method, refer to Figure 3 , Figure 4 , Figure 7 , Figure 8 The inner circumferential surface of the MPO inner shell 8 is provided with abutment plates 84, each corresponding to a blade 92. Each abutment plate 84 group includes two abutment plates 84 spaced apart, and the abutment plates 84 extend axially along the MPO inner shell 8. Specifically, the dimensions of the abutment plates 84 are controlled by setting the abutment plates 84, as shown in the reference... Figure 8 When the optical cable is inserted into the inner shell 8 of the MPO, the outer peripheral surface of the outer sheath 14 contacts the side edge of the abutment plate 84. This arrangement controls the insertion depth after the optical cable is inserted, ensuring that the end of the outer sheath 14 is approximately flush with the end of the abutment plate 84. Then, the bushing 9 is... Figure 7 Insert the blade 92 in the direction indicated by the middle arrow, and position the blade between the two abutment plates 84. In this way, the two abutment plates 84 can position the outer skin 14, reducing the probability of the outer skin 14 avoiding the bushing 9 along the axial direction when it moves, ensuring that the cutting blade can effectively cut the outer skin 14. Furthermore, the two abutment plates 84 radially limit the outer skin 14, reducing the elastic phase change of the outer skin 14 along the radial direction, causing the local force to concentrate at the contact point between the outer skin 14 and the cutting blade, making it easier to cut the outer skin 14, and ensuring the cutting effect of the cutting blade on the outer skin 14.
[0030] Furthermore, as a specific implementation method, refer to Figure 3 The two abutting plates 84 are arranged parallel to each other on their closest sides, and the distance between the first close sides of the two abutting plates 84 is greater than the thickness of the blade plate 92. Specifically, the distance between the first close sides of the two abutting plates 84 is greater than or equal to twice the thickness of the blade plate 92 and the outer skin 14.
[0031] Furthermore, as a preferred embodiment, refer to Figure 1 , Figure 4 Located between the two first surfaces, the side wall of the MPO inner shell 8 is provided with an exhaust hole 82 that communicates with the atmosphere. By providing the exhaust hole 82, it is beneficial for the adhesive to enter between the two abutment plates 84, thereby ensuring that the adhesive can fully cover the outer skin 14 and ensuring the tensile strength of the structure after subsequent injection molding.
[0032] Furthermore, as a specific implementation, the side of the abutment plate 84 near the axis of the MPO inner shell 8 is arranged parallel to the axis of the MPO inner shell 8.
[0033] Furthermore, as a preferred embodiment, refer to Figure 4 , Figure 7 At least one connecting groove 840 is provided on the side of the abutment plate 84 near the axis of the MPO inner shell 8. The two ends of the connecting groove 840 penetrate the first surface and the side opposite to the first surface of the abutment plate 84. Specifically, by providing the connecting groove 840, it is more convenient for the adhesive to enter between the two abutment plates 84 during adhesive injection, so as to fill the space between the two abutment plates 84 with adhesive.
[0034] Further, preferably, the blade 92 comprises two blades, which are symmetrically arranged about the axis of the bushing 9.
[0035] Furthermore, when the bushing 9 is inserted into the inner shell 8 of the MPO, the trajectory of the parallel segment 921 moving around the axis is a circular surface, which intersects with the abutment plate 84.
[0036] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.
Claims
1. An MPO optical cable structure comprising an MPO inner housing (8) and a bushing (9) which is plugged into the MPO inner housing (8), the bushing (9) comprising a cylinder (90) and a guide section (902) provided at the end of the cylinder (90), the guide section (902) being a conical surface coaxially provided with the cylinder (90), characterized in that, At least one blade plate (92) is arranged on the outer circumferential surface of the bushing (9) along the axial direction of the bushing (9), and the cutting edge of the blade plate (92) comprises a parallel section (921) and a connecting section (922), the parallel section (921) is arranged at the connecting area of the column (90) and the guide section (902), and the connecting section (922) is connected with one end of the guide section (902) and the other end of the parallel section (921); A plurality of abutting plate (84) groups corresponding to the blade plate (92) are arranged on the inner circumferential surface of the MPO inner shell (8), each of the abutting plate (84) groups comprises two abutting plates (84) arranged at intervals, and the abutting plates (84) extend along the axial direction of the MPO inner shell (8); The two abutting plates (84) are arranged in parallel on the side close to each other, and the distance between the two abutting plates (84) on the side close to each other is greater than the thickness of the blade plate (92); Between the two first sides, the side wall of the MPO inner shell (8) is provided with an exhaust hole (82) communicating with the atmosphere.
2. The MPO cable structure of claim 1, wherein, The side edge of the abutting plate (84) close to the axis of the MPO inner shell (8) is arranged in parallel with the axis of the MPO inner shell (8).
3. The MPO cable structure of claim 2, wherein, The side edge of the abutting plate (84) close to the axis of the MPO inner shell (8) is provided with at least one communication groove (840), and the two ends of the communication groove (840) penetrate the first side and the side opposite to the first side of the abutting plate (84).
4. The MPO cable structure of claim 1, wherein, The blade plate (92) comprises two blade plates (92) arranged in symmetry about the axis of the bushing (9).
5. The MPO cable structure of claim 4, wherein, When the bushing (9) is inserted into the MPO inner shell (8), the running track of the parallel section (921) when moving around the axis is a circumferential surface, and the circumferential surface intersects with the abutting plate (84).