An lc straight melt type connector

Abstract

This utility model discloses an LC direct fusion connector, which relates to the field of optical fiber communication technology. The LC direct fusion connector includes an optical cable, one end of which is fused with a ferrule assembly. A heat-shrink tubing is fitted at the connection between the ferrule assembly and the optical cable. A tail assembly is inserted into the optical cable at the rear end of the ferrule assembly. Kevlar fiber optic cables are provided along the optical cable. A fastening aluminum tube is provided on the outer side of the tail end of the tail assembly, and a heat-shrink tubing is fitted on the outer side of one end of the fastening aluminum tube. A front cover assembly is inserted into the outer side of the ferrule assembly. This utility model allows for convenient transfer to a heating furnace for heat-shrink tubing heating protection after optical fiber fusion splicing, reducing the likelihood of fiber breakage. After heat shrinking, only simple assembly is required to complete the entire process, making on-site operation more convenient, reducing the failure rate, optimizing splicing performance, and significantly reducing optical fiber transmission loss.

Description

Technical Field

[0001] This utility model relates to the field of optical fiber communication technology, specifically to an LC direct-fusion connector. Background Technology

[0002] With the rapid development of the optical communication industry, conventional optical patch cords, butterfly optical fiber pigtails, optical connectors and other products are widely used. In particular, conventional connectors such as LC, FC, and ST are in high demand for rapid on-site splicing in fiber optic splicing scenarios such as FTTR, FTTH, and data center renovation.

[0003] Existing fusion-type fiber optic connectors are protected with heat-shrink tubing after fusion splicing. The operation procedure is as follows: after connecting the fusion-type fiber optic connector to a flexible optical cable or a butterfly optical cable, the fusion splicing operation is performed using a fiber optic fusion splicer. This includes the following steps: the cleaved ends of the two fibers to be connected are placed into the V-groove of the fiber optic clamp of the fiber optic fusion splicer. The two fibers are fixed in position by the fiber optic clamp of the fiber optic fusion splicer. The cleaved ends of the two fibers are close to the electrode pins of the fiber optic fusion splicer. During the fusion operation, the slider on the lower side of the fiber optic clamp is controlled to move the ends of the two fibers closer together and complete the welding operation. After the fusion is completed, the heat-shrink tubing with the fusion splice is placed on the fusion joint. The heat-shrink tubing is heated by an external heating furnace. After the heat-shrink tubing shrinks, it protects the fusion joint.

[0004] The success rate of the above operation is relatively high when both parts of the fiber being fused are bare fibers. However, if the two parts of the fiber being fused are various connectors such as SC, ST, FC, or LC, and are being fused with a drop cable or patch cord, or a drop cable and patch cord, the outer protective layer of the fiber being fused has a much larger outer diameter than that of a 0.125um fiber, and the weight of the pigtail connector itself means that after the fusion is completed, when applying the heat shrink tubing, both parts of the fiber being fused need to be held with both hands simultaneously, released from the clamp, and then carefully moved to the fusion point with two fingers of one hand. This requires both hands, which are already occupied, to use two more fingers to move the tubing, making it easy to break the fusion joint of the fiber.

[0005] In the existing hot-shrink splice installation process, after the heat-shrink tubing is fitted, it must be placed in a heating tank to complete the heat shrinking process, which can easily lead to the fiber breaking again. The whole process is complicated and involves too many human factors, which greatly reduces the success rate of splicing. Therefore, we have proposed an LC direct-fusion connector to solve the above problems. Utility Model Content

[0006] To address the shortcomings of existing technologies, this invention provides an LC direct-fusion connector, which solves the problem of complex processes, excessive human intervention, and significantly reduced fusion success rate.

[0007] To achieve the above objectives, this utility model is implemented through the following technical solution: an LC direct fusion connector, including an optical cable, one end of which is fused with a ferrule assembly, a heat shrink tubing is sleeved at the connection between the ferrule assembly and the optical cable, a tail assembly is inserted into the optical cable at the rear end of the ferrule assembly, and the optical cable is provided with Kevlar fiber lines. The rear tail assembly has a fastening aluminum tube on its outer side at the tail end, and a heat shrink tubing is provided on the outer side of one end of the fastening aluminum tube. The front cover assembly is inserted into the outer side of the insert assembly, and a dust cap is inserted into the front end of the front cover assembly. The front end of the insert assembly is inserted into one end of the inner cavity of the dust cap.

[0008] Preferably, the ferrule assembly includes a ceramic ferrule, the inner cavity of which is provided with a first optical fiber, and the outer side of which is provided with a ferrule tail.

[0009] Preferably, the rear assembly includes a rear cavity, a spring is inserted into the front end of the rear cavity, an aluminum insert is inserted into the rear end of the rear cavity, and one end of the aluminum insert, located outside the rear cavity, is connected to the fastening aluminum tube. Both sides of the rear cavity are provided with latches, and the latches are engaged with the front cover assembly.

[0010] Preferably, the front cover assembly includes a housing, and the housing has locking holes on both side walls and near the rear end for engaging the locking claw.

[0011] Preferably, the front end of the rear cavity is inserted into the rear end cavity of the shell, and the two are compatible.

[0012] Preferably, a positioning protrusion is integrally formed on one side of the top surface of the rear cavity, and a positioning slot for inserting the positioning protrusion is provided on the top surface of the shell at the rear end.

[0013] Preferably, it also includes a tail sleeve, which is sleeved on the optical cable, and one end of the tail sleeve is inserted into the outside of the fastening aluminum tube. Beneficial effects

[0014] This invention provides an LC direct-fuse connector. Compared with the prior art, it has the following advantages: This LC direct fusion connector allows for easy fiber optic splicing. Because the ceramic ferrule is very lightweight, the fiber can be lifted directly without damaging the splice. After lifting, a heat-shrink tubing is applied, and due to its light weight, it can be easily transferred to the heating furnace for heat shrinking. Therefore, the entire process is convenient and efficient. After splice protection, the rear cavity and shell are assembled. The rear cavity, aluminum insert, and fastening aluminum tube are all pre-assembled at the factory, making on-site installation more convenient for customers. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the exploded structure of this utility model; Figure 3 This is a schematic diagram of the ferrule assembly structure of this utility model; Figure 4 This is a schematic diagram of the rear tail assembly structure of this utility model; Figure 5 This is a schematic diagram of the cross-sectional structure of the rear tail assembly of this utility model; Figure 6 This is a schematic diagram of the front cover assembly of this utility model.

[0016] In the diagram: 1. Optical cable; 2. Flanged assembly; 21. Ceramic ferrule; 22. First optical fiber; 23. Flanged tail shank; 3. Heat shrink tubing; 4. Rear tail assembly; 41. Rear cavity; 42. Spring; 43. Aluminum insert; 44. Positioning protrusion; 45. Claw; 5. Kevlar fiber cable; 6. Fastening aluminum tube; 7. Fastening heat shrink tubing; 8. Front cover assembly; 81. Shell; 82. Positioning slot; 83. Locking hole; 9. Dust cap; 10. Tail sleeve. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figures 1-2This utility model provides a technical solution: an LC direct fusion connector, including an optical cable 1, a ferrule assembly 2 fused to one end of the optical cable 1, a heat shrink tubing 3 sleeved at the connection between the ferrule assembly 2 and the optical cable 1, a tail assembly 4 inserted into the optical cable 1 at the rear end of the ferrule assembly 2, and Kevlar fiber 5 provided on the optical cable 1; a fastening aluminum tube 6 is provided on the outer side of the tail end of the tail assembly 4, a tight-fitting heat shrink tubing 7 is provided on the outer side of one end of the fastening aluminum tube 6, a front cover assembly 8 is inserted into the outer side of the ferrule assembly 2, a dust cap 9 is inserted into the front end of the front cover assembly 8, and the front end of the ferrule assembly 2 is inserted into one end of the inner cavity of the dust cap 9, and also includes a tail sleeve 10, which is sleeved on the optical cable 1, and one end of the tail sleeve 10 is inserted into the outer side of the fastening aluminum tube 6; First, sequentially attach the tail sleeve 10, the fastening aluminum tube 6 with the heat shrink tubing 7, the tail assembly 4, and the heat shrink tubing 3 to the rear end of the optical cable 1, which is to be fused with the direct fusion connector, as required. The optical cable 1 can be a butterfly-shaped drop cable, a flexible optical cable, etc. Place the optical cable 1 into the fusion splicer clamp and tighten it. Next, place the ferrule assembly 2 into another clamp of the fusion splicer and tighten it. Then, start the fusion splicing program to fuse the optical fiber at the tail of the ferrule assembly 2 to the optical cable 1. After fusion, lift the entire fused assembly. Next, place the heat shrink tubing 3 on the fusion joint between the ferrule assembly 2 and the optical cable 1. Then, transfer the fusion assembly with the heat shrink tubing 3 into the heating furnace and start the heating program to tighten the heat shrink tubing 3, protecting the fusion point at the connection between the ferrule assembly 2 and the optical cable 1. Finally, attach the tail assembly 4 along with the... The ferrule assembly 2 is inserted into the tail end of the front cover assembly 8, and the front cover assembly 8 and the tail assembly 4 are securely engaged together. This allows the front cover assembly 8 and the tail assembly 4 to protect the ferrule assembly 2 and the splice between the ferrule assembly 2 and the optical cable 1. Next, the Kevlar fiber 5 inside the optical cable 1 is placed on the outside of the tail end of the tail assembly 4. Then, a fastening aluminum tube 6 is fitted onto the Kevlar fiber 5 on the outside of the tail end of the tail assembly 4. Finally, the fastening aluminum tube 6 is clamped tightly with pliers, thus clamping the Kevlar fiber 5 between the tail end of the tail assembly 4 and the fastening aluminum tube 6. Then, a heat gun is used to heat the heat shrink tubing 7, causing it to shrink tightly against the outside of the optical cable 1. Finally, the tail sleeve 10 is fitted onto the side of the heat shrink tubing 7. The entire splicing process is now complete. Finally, the front end of the ferrule assembly 2 is protected by a dust cap 9. See Figures 1-3 The ferrule assembly 2 includes a ceramic ferrule 21, the inner cavity of which is provided with a first optical fiber 22, and the outer side of which is provided with a ferrule tail 23. The ceramic ferrule 21 in the ferrule assembly 2 can both pass through and install the first optical fiber 22, and provide an attachment base for the ferrule tail 23. Then, the first optical fiber 22 can be thermally fused to the optical cable 1.

[0019] See Figure 1 , Figure 2 , Figure 4 and Figure 5 The rear assembly 4 includes a rear cavity 41, a spring 42 is inserted into the front end of the rear cavity 41, and an aluminum insert 43 is inserted into the rear end of the rear cavity 41. One end of the aluminum insert 43 is located outside the rear cavity 41 and is connected to the fastening aluminum tube 6. Both sides of the rear cavity 41 are provided with claws 45, and the claws 45 are engaged with the front cover assembly 8. The rear cavity 41 in the rear assembly 4 can provide elastic force to the ferrule 23 on the ceramic ferrule 21 via the spring 42, thereby limiting the ceramic ferrule 21 while providing elastic force to ensure safer connection of the ceramic ferrule 21 to other devices. It also provides an installation base for the aluminum insert 43, which can be used to clamp and limit the Kevlar fiber wire 5 on the optical cable 1 in conjunction with the fastening aluminum tube 6, thereby improving the firmness of the optical cable 1 installed in the rear cavity 41. The claw 45 can engage with the front cover assembly 8, thereby connecting the rear cavity 41 and the front cover assembly 8 together.

[0020] See Figures 1-6 The front cover assembly 8 includes a housing 81. The housing 81 has two side walls and near the rear end with locking holes 83 for engaging the locking claws 45. The rear cavity 41 has a positioning protrusion 44 integrally formed on one side of the top surface. The housing 81 has a positioning slot 82 for inserting the positioning protrusion 44 on the top surface and near the rear end. The front end of the rear cavity 41 is inserted into the rear end cavity of the housing 81, and the two are compatible. The housing 81 in the front cover assembly 8 can be used to insert and install the ceramic insert 21, and also provides a base for the locking hole 83 and the positioning slot 82. The locking hole 83 can be engaged with the locking claw 45 on the rear cavity 41, so that the rear end of the housing 81 and the front end of the rear cavity 41 can be inserted and connected together. The positioning slot 82 on the housing 81 can provide insertion positioning on the positioning protrusion 44 on the rear cavity 41, thereby preventing incorrect insertion of the housing 81 and the rear cavity 41.

[0021] During operation, first, the tail sleeve 10, the fastening aluminum tube 6 with the heat shrink tubing 7, the tail assembly 4, and the heat shrink tubing 3 are sequentially fitted onto the rear end of the optical cable 1, which is to be fused with the direct fusion connector, as required. The optical cable 1 can be a butterfly-shaped drop cable, a flexible optical cable, etc. The optical cable 1 is placed in the fusion splicer clamp and tightened. Next, the ferrule assembly 2 is placed in another clamp of the fusion splicer and tightened. Then, the fusion splicing program is started, fusing the optical fiber at the tail of the ferrule assembly 2 to the optical cable 1. After fusion, the entire fused assembly is lifted. Then, the heat shrink tubing 3 is fitted onto the fusion joint between the ferrule assembly 2 and the optical cable 1. The fusion assembly with the heat shrink tubing 3 is then transferred to the heating furnace, and the heating program is started to tighten the heat shrink tubing 3, protecting the fusion point at the connection between the ferrule assembly 2 and the optical cable 1. Finally, the tail assembly 4 is connected... The ferrule assembly 2 is inserted into the tail end of the front cover assembly 8, and the front cover assembly 8 and the tail assembly 4 are securely engaged together. This allows the front cover assembly 8 and the tail assembly 4 to protect the ferrule assembly 2 and the splice between the ferrule assembly 2 and the optical cable 1. Next, the Kevlar fiber 5 inside the optical cable 1 is placed on the outside of the tail end of the tail assembly 4. Then, a fastening aluminum tube 6 is fitted onto the Kevlar fiber 5 on the outside of the tail end of the tail assembly 4. Finally, the fastening aluminum tube 6 is clamped tightly with pliers, so that the tail end of the tail assembly 4 and the fastening aluminum tube 6 clamp the Kevlar fiber 5. Then, a heat gun is used to heat the heat shrink tubing 7, causing it to shrink tightly against the outside of the optical cable 1. Finally, the tail sleeve 10 is fitted onto the side of the heat shrink tubing 7. The entire splicing process is now complete. Finally, the front end of the ferrule assembly 2 is protected by the dust cap 9. The ceramic ferrule 21 in the ferrule assembly 2 can both penetrate and install the first optical fiber 22 and provide an attachment base for the ferrule tail 23. Then, the first optical fiber 22 can be thermally fused to the optical cable 1. The rear cavity 41 in the rear tail assembly 4 can provide elastic force to the ferrule tail 23 on the ceramic ferrule 21 via the spring 42, thereby limiting the ceramic ferrule 21 while providing elasticity, so as to make the ceramic ferrule 21 safer when connected to other devices. It can also provide an installation base for the aluminum insert 43. The aluminum insert 43 can work with the fastening aluminum tube 6 to clamp and limit the Kevlar fiber wire 5 on the optical cable 1, thereby improving the firmness of the optical cable 1 installed in the rear cavity 41. The claw 45 can engage with the front cover assembly 8, thereby connecting the rear cavity 41 and the front cover assembly 8 together.

[0022] The housing 81 in the front cover assembly 8 can be used to insert and install the ceramic insert 21, and also provides a base for the locking hole 83 and the positioning slot 82. The locking hole 83 can be engaged with the locking claw 45 on the rear cavity 41, so that the rear end of the housing 81 and the front end of the rear cavity 41 can be inserted and connected together. The positioning slot 82 on the housing 81 can provide insertion positioning on the positioning protrusion 44 on the rear cavity 41, thereby preventing incorrect insertion of the housing 81 and the rear cavity 41.

[0023] In summary, this device can be easily transferred to a heating furnace for heat shrink tubing heating protection after fiber optic splicing, reducing the likelihood of fiber breakage. After heat shrinking, only simple assembly is required to complete the entire process, making on-site operation more convenient, reducing the failure rate, optimizing splicing performance, and significantly reducing fiber optic transmission loss.

[0024] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

Claims

1. An LC direct-fusion connector, comprising an optical cable (1), characterized in that: One end of the optical cable (1) is fused with a ferrule assembly (2), and a heat shrink tubing (3) is sleeved at the connection between the ferrule assembly (2) and the optical cable (1). A tail assembly (4) is inserted on the optical cable (1) and at the rear end of the ferrule assembly (2). Kevlar fiber wires (5) are provided on the optical cable (1). The rear tail assembly (4) has a fastening aluminum tube (6) on its outer side at the tail end. A heat shrink tubing (7) is provided on the outer side of one end of the fastening aluminum tube (6). A front cover assembly (8) is inserted into the outer side of the insert assembly (2). A dust cap (9) is inserted into the front end of the front cover assembly (8). The front end of the insert assembly (2) is inserted into one end of the inner cavity of the dust cap (9).

2. The LC direct-fuse connector according to claim 1, characterized in that: The ferrule assembly (2) includes a ceramic ferrule (21), the inner cavity of which is provided with a first optical fiber (22), and the outer side of which is provided with a ferrule tail (23).

3. The LC direct-fuse connector according to claim 1, characterized in that: The rear assembly (4) includes a rear cavity (41), a spring (42) is inserted into the front end of the rear cavity (41), and an aluminum insert (43) is inserted into the rear end of the rear cavity (41). One end of the aluminum insert (43) located outside the rear cavity (41) is connected to the fastening aluminum tube (6). Both sides of the rear cavity (41) are provided with claws (45), and the claws (45) are engaged with the front cover assembly (8).

4. An LC direct-fuse connector according to claim 3, characterized in that: The front cover assembly (8) includes a housing (81), and the housing (81) has two side walls and near the rear end with locking holes (83) for engaging the locking claw (45).

5. An LC direct-fuse connector according to claim 4, characterized in that: The front end of the rear cavity (41) is inserted into the rear end cavity of the shell (81), and the two are compatible.

6. An LC direct-fuse connector according to claim 4, characterized in that: The rear cavity (41) has an integrally formed positioning protrusion (44) on one side of its top surface, and the top surface of the shell (81) and the rear end position are provided with a positioning slot (82) for inserting the positioning protrusion (44).

7. An LC direct-fuse connector according to claim 1, characterized in that: It also includes a tail sleeve (10), which is sleeved on the optical cable (1), and one end of the tail sleeve (10) is inserted into the outside of the fastening aluminum tube (6).

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