Optical fiber distribution box

Abstract

This utility model discloses an optical fiber splitter box, comprising a first cover, a second cover, a splitter, at least one input adapter, and multiple user-end output adapters. The first cover has a receiving cavity, at least one first through hole, and multiple second through holes. All splitters are disposed within the receiving cavity. The input adapters correspond to the first through holes, with the input end of each input adapter used to connect to the trunk optical cable and the output end of each input adapter connected to the splitter. The user-end output adapters correspond to the second through holes, with the output end of each user-end output adapter used to connect to the user-end distribution optical cable and the input end of each user-end output adapter connected to the splitter. The second cover is connected to the first cover to seal the receiving cavity. At the factory stage, the splitter, input adapters, and user-end output adapters are pre-connected inside the box, eliminating the need for fiber splitting and splicing operations during on-site installation, thus improving on-site installation and usage efficiency.

Description

Technical Field

[0001] This utility model relates to the field of optical communication equipment technology, and in particular to an optical fiber splitter box. Background Technology

[0002] Fiber optic distribution boxes are crucial equipment units in fiber optic transmission and distribution systems, used to connect trunk optical cables to distribution cables. With the widespread adoption of FTTX (Fiber to the Application), the role of fiber optic distribution boxes has become increasingly important. Traditional fiber optic distribution box installation requires opening the box, inserting the trunk optical cable from the inlet, securing the cable, stripping the fibers inside the box, branching off the fibers from the trunk cable, and splicing them with the connectors to distribute the optical signal to the ports. This process is relatively difficult, requires professionally trained workers with a certain level of expertise, and is time-consuming and inefficient, hindering large-scale deployment. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide an improved optical fiber splitter box, addressing at least one of the defects mentioned in the background art.

[0004] The technical solution adopted by this utility model to solve its technical problem is: to provide an optical fiber splitter box, which includes a first cover, a second cover, a splitter, at least one input adapter and multiple user output adapters;

[0005] The first cover has a receiving cavity, at least one first through hole and a plurality of second through holes, wherein the first through hole and the second through holes are respectively connected to the receiving cavity;

[0006] All of the beam splitters are housed within the receiving cavity;

[0007] The input adapter corresponds to the first through hole. A portion of each input adapter is located inside the receiving cavity, and the other portion of each input adapter extends out of the receiving cavity through the first through hole. The input end of each input adapter is used to connect to the trunk optical cable, and the output end of each input adapter is connected to the beam splitter.

[0008] The user terminal output adapter and the second through hole correspond one-to-one. A portion of each user terminal output adapter is located inside the receiving cavity, and the other portion of each user terminal output adapter extends out of the receiving cavity through the second through hole. The output end of each user terminal output adapter is used to connect to the user terminal distribution optical cable, and the input end of each user terminal output adapter is connected to the splitter.

[0009] The second cover is connected to the first cover to close the receiving cavity.

[0010] Preferably, the fiber optic splitter box further includes at least one cascaded output adapter, and the first cover is also provided with at least one third through hole, the third through hole being connected to the receiving cavity, the cascaded output adapter corresponding to the third through hole, a portion of each cascaded output adapter being located inside the receiving cavity, and the other portion of each cascaded output adapter extending outside the receiving cavity through the third through hole, the input end of the cascaded output adapter being connected to the splitter, and the output end of the cascaded output adapter being used to cascade another fiber optic splitter box.

[0011] Preferably, the fiber optic distribution box further includes a fiber coil fixing unit, and the first cover is provided with a first mounting groove inside the receiving cavity;

[0012] The splitter includes a control module, an input optical fiber, and an output optical fiber. The input optical fiber is connected to the output end of the input adapter, and the output optical fiber is connected to at least the input end of the user-end output adapter.

[0013] The control module is fitted and fixed to the first mounting slot, and the fiber coil fixing unit fixes the coiled input fiber and output fiber.

[0014] Preferably, the fiber coil fixing unit includes a fixing member and at least one fiber coil clamp. The fixing member is located inside the receiving cavity and connected to the first cover. The fiber coil clamp is connected to the fixing member and clamps and fixes the coiled input fiber and output fiber.

[0015] Preferably, each of the user terminal output adapters is arranged at intervals along a first horizontal direction and a second horizontal direction, wherein the first horizontal direction and the second horizontal direction are perpendicular to each other;

[0016] At least along the first horizontal direction, the central axes of each of the user terminal output adapters are not parallel, so that an outwardly expanding angle is formed between two adjacent user terminal output adapters.

[0017] Preferably, the fiber optic distribution box further includes a sealing element disposed between the first cover and the second cover.

[0018] Preferably, the second cover 2 has a second mounting groove on the side facing the receiving cavity, and the sealing element is installed in the second mounting groove;

[0019] And / or, the seal is annular.

[0020] Preferably, the first cover and the second cover are detachably connected.

[0021] Preferably, the first cover has a plurality of fourth through holes, the second cover has a plurality of fifth through holes, and the fiber optic distribution box further includes a plurality of fastening components, which are detachably inserted through the fourth through holes and the fifth through holes to detachably fasten the first cover and the second cover together.

[0022] Preferably, the second cover is further provided with a plurality of mounting holes, which are used to fix the second cover to an external anchor.

[0023] This invention offers at least the following advantages: The splitter, input adapter, and user-end output adapter are pre-connected within the fiber optic distribution box at the factory. During on-site installation, simply connect the trunk optical cable to the input adapter and the user-end distribution cable to the user-end output adapter to achieve fiber optic signal transmission and distribution. This pre-connection eliminates the need for on-site splitting and splicing operations, improving on-site installation efficiency and reducing construction difficulty and labor costs. Furthermore, since the splitter, input adapter, and user-end output adapter are all centrally located within the first cover's cavity, the fiber optic lines within the box are also concentrated there. If the first and second covers need to be disassembled for inspection and maintenance, the fiber optic lines inside the box will not be damaged, facilitating maintenance. Attached Figure Description

[0024] To more clearly illustrate the technical solution of this utility model, the following will further describe this utility model in conjunction with the accompanying drawings and embodiments. In the drawings:

[0025] Figure 1 This is a three-dimensional structural schematic diagram of the fiber optic distribution box according to the first embodiment of this utility model;

[0026] Figure 2 yes Figure 1 The diagram shows a side view of the fiber optic distribution box.

[0027] Figure 3 yes Figure 1 The diagram shows an exploded view of the fiber optic distribution box.

[0028] Figure 4 yes Figure 1 A schematic diagram of the internal component layout structure of the first cover of the fiber optic distribution box shown.

[0029] Figure 5 yes Figure 1 A three-dimensional structural diagram of the first cover of the fiber optic distribution box shown;

[0030] Figure 6 yes Figure 5 A schematic diagram of the internal structure of the receiving cavity of the first cover is shown;

[0031] Figure 7 yes Figure 1 The diagram shows a front view of the fiber optic distribution box.

[0032] Figure 8 yes Figure 1 A three-dimensional structural diagram of the second cover of the fiber optic distribution box shown;

[0033] Figure 9 This is a three-dimensional structural diagram of the fiber optic distribution box according to the second embodiment of this utility model. Detailed Implementation

[0034] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0035] Unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal connection of two components or the interaction between two components. The terms "first," "second," and "third," etc., are used only for the convenience of describing this technical solution and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first," "second," "third," etc., may explicitly or implicitly include one or more of that feature. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0036] Please see Figures 1 to 3 This utility model discloses an optical fiber splitter box, which includes a first cover 1, a second cover 2, a splitter 3, at least one input adapter 4, and multiple user-end output adapters 5. Multiple user-end output adapters 5 refer to a minimum of two user-end output adapters 5. Figures 1 to 3 In the illustrated embodiment, the number of user-end output adapters 5 is eight. For example... Figure 9 In another embodiment shown, the number of user-end output adapters 5 is sixteen.

[0037] The first cover 1 has a receiving cavity, at least one first through hole 11, and a plurality of second through holes 12. The first through hole 11 and the second through hole 12 are respectively connected to the receiving cavity. The receiving cavity is formed by the first cover 1. The second cover 2 is connected to the first cover 1 to close the receiving cavity.

[0038] All optical splitters 3 are housed within the receiving cavity. Also known as optical splitters, optical splitters 3 are fiber optic junction devices with multiple input and output terminals, used for coupling, branching, and distributing optical signals. In the fiber optic distribution box, optical splitters 3 receive the optical signal from the trunk optical cable and split it into multiple lower-power signals, which are then connected to multiple user homes via distribution cables at the user end, thus achieving "one-to-many" connectivity and efficiently utilizing trunk fiber optic resources.

[0039] The input adapter 4 corresponds to the first through-hole 11. That is, the number of input adapters 4 is consistent with the number of first through-holes 11. When there is one input adapter 4, there is also one first through-hole 11; when there are two or more input adapters 4, there are also two or more first through-holes 11. For a single input adapter 4, one part of the input adapter 4 is located inside the receiving cavity, and the other part extends out of the receiving cavity through the first through-hole 11. The input end of each input adapter 4 is used to connect to the trunk optical cable, and the output end of each input adapter 4 is connected to the splitter 3.

[0040] The user-end output adapter 5 corresponds one-to-one with the second through hole 12. That is, the number of input adapters 4 is consistent with the number of first through holes 11. For a single user-end output adapter 5, one part of each user-end output adapter 5 is located inside the receiving cavity, and the other part of each user-end output adapter 5 extends out of the receiving cavity through the second through hole 12. The output end of each user-end output adapter 5 is used to connect to the user-end distribution optical cable, and the input end of each user-end output adapter 5 is connected to the splitter 3.

[0041] Thus, the trunk optical cable, input adapter 4, splitter 3, user-end output adapter 5, and user-end distribution optical cable are sequentially connected. The connection of input adapter 4, splitter 3, and user-end output adapter 5 is completed at the factory. During field installation, simply connect the trunk optical cable to input adapter 4 and the user-end output adapter 5 to the user-end distribution optical cable. After receiving the optical signal from the trunk optical cable, splitter 3 distributes the optical signal to the respective user-end distribution optical cables through the user-end output adapters 5, thereby realizing the basic function of the fiber optic distribution box.

[0042] In summary, this utility model has at least the following beneficial effects: During the factory manufacturing stage of the fiber optic distribution box, the splitter 3, input adapter 4, and user-end output adapter 5 are pre-connected inside the box. During on-site installation, the main optical cable is simply connected to the input adapter 4, and the user-end distribution cable is connected to the user-end output adapter 5 to achieve fiber optic signal transmission and distribution. This pre-connection eliminates the need for fiber splitting and splicing operations during on-site installation, improving the efficiency of on-site installation and reducing construction difficulty and labor costs. Furthermore, since the splitter 3, input adapter 4, and user-end output adapter 5 are all centrally located within the cavity of the first cover 1, the fiber optic lines inside the box are all centrally arranged within the cavity of the first cover 1. If the first cover 1 and the second cover 2 need to be disassembled for inspection and maintenance, it will not damage the fiber optic lines inside the box, facilitating maintenance.

[0043] Please see Figures 1 to 3 In some embodiments, the fiber optic splitter box further includes at least one cascaded output adapter 6. The first cover 1 also has at least one third through-hole 13, which communicates with the receiving cavity. The cascaded output adapter 6 corresponds to the third through-hole 13. That is, the number of cascaded output adapters 6 is consistent with the number of third through-holes 13. A portion of each cascaded output adapter 6 is located inside the receiving cavity, and the other portion of each cascaded output adapter 6 extends out of the receiving cavity through the third through-hole 13. The input end of the cascaded output adapter 6 is connected to the splitter 3. The cascaded output adapter 6 is used to cascade another fiber optic splitter box. Thus, the fiber optic splitter box can be cascaded with another fiber optic splitter box. For example, in areas where users are relatively dispersed and coverage is phased, a two-stage splitting network structure is required, and cascaded output adapters 6 can be set to enable cascading between the fiber optic splitter box and another fiber optic splitter box. Alternatively, in other embodiments, the cascaded output adapter 6 may not be provided. For example, in areas with high user density and concentrated distribution, only a single-level optical splitting network structure is needed, and the fiber optic distribution box does not need to be cascaded with another fiber optic distribution box, so there is no need to install cascaded output adapter 6.

[0044] The connections between the first through-hole 11 and the input adapter 4, the second through-hole 12 and the user output adapter 5, and the third through-hole 13 and the cascaded output adapter 6 can be threaded. The input adapter 4, the user output adapter 5, and the cascaded output adapter 6 can all be adapters commonly used in the prior art, such as SC, LC, FC, and other types of adapters.

[0045] Please see Figures 4 to 6In some embodiments, the fiber optic splitter box further includes a fiber coiling and fixing unit. The fiber coiling and fixing unit is used to fix the position of the splitter 3. The first cover 1 also has a first mounting groove 15 inside the receiving cavity. The splitter 3 includes a control module 31, an input fiber 32, and an output fiber 33. The control module 31 includes a control chip, which is the core functional device of the splitter 3. For example, in some embodiments, the splitter 3 can be a PLC splitter 3, and its control module 31 is a PLC chip. Alternatively, in other embodiments, the splitter 3 can be of other types. The input fiber 32 is connected to the output end of the input adapter 4, and the output fiber 33 is connected to at least the input end of the user-end output adapter 5. In embodiments with a cascaded output adapter 6, the output fiber 33 is also connected to the cascaded output adapter 6. The control module 31 is fitted and fixed in the first mounting groove 15, that is, the control module 31 is embedded in the first mounting groove 15 for fixation. The fiber coiling and fixing unit fixes the coiled input fiber 32 and output fiber 33.

[0046] Further, in some embodiments, the fiber coil fixing unit includes a fixing member 71 and at least one fiber coil clamp 72. The fixing member 71 is located within the receiving cavity and connected to the first cover 1. The fiber coil clamp 72 is connected to the fixing member 71, and the fiber coil clamp 72 clamps and fixes the coiled input fiber 32 and output fiber 33. Specifically, as shown... Figures 4 to 6 In the illustrated embodiment, two fixing members 71 and two fiber optic clips 72 are provided. The fixing members 71 are screw posts, and the fiber optic clips 72 are connected to the screw posts. The two fixing members 71 are spaced apart and positioned in the middle of the receiving cavity, respectively connected and fixed to the inner top wall of the first cover 1. The two fiber optic clips 72 clamp and fix the coiled input optical fiber 32 and output optical fiber 33 at different positions. Thus, the splitter 3 is fixed within the receiving cavity, and the optical fiber lines are kept neatly coiled within it.

[0047] Please see Figure 1 , Figure 2 and Figure 7 In some embodiments, the user-end output adapters 5 are arranged at intervals along a first horizontal direction A1 and a second horizontal direction A2, respectively. The first horizontal direction A1 and the second horizontal direction A2 are perpendicular to each other. Specifically, in some embodiments, when the fiber optic distribution box is placed on a horizontal surface, it has a length direction and a width direction, with the first horizontal direction A1 being the width direction and the second horizontal direction A2 being the length direction. Alternatively, in other embodiments, the second horizontal direction A2 is aligned with the central axis of the input adapter 4, or the second horizontal direction A2 is aligned with the central axis of the cascaded output adapter 6; the first horizontal direction A1 is perpendicular to or intersects the central axis of the input adapter 4; or the first horizontal direction A1 is perpendicular to or intersects the central axis of the cascaded output adapter 6. Figure 7As shown, at least along the first horizontal direction A1, the central axes of each user-end output adapter 5 are not parallel, creating an outwardly expanding angle U between adjacent user-end output adapters 5. This results in a larger gap between adjacent user-end output adapters 5 as they move diagonally upwards, providing more operating space for personnel when connecting the user-end distribution optical cable to the user-end output adapter 5. The angle U formed between adjacent user-end output adapters 5 can be an acute angle greater than 0° and less than 90°, and the specific angle can be set according to actual needs.

[0048] Please see Figure 3 In some embodiments, the fiber optic distribution box further includes a sealing element 8 disposed between the first cover 1 and the second cover 2. This sealing element 8 can be made of materials such as silicone, rubber, or silicone rubber, and possesses a certain degree of elastic sealing capability. Further, such as... Figure 8 As shown, in some embodiments, the second cover 2 has a second mounting groove 21 on the side facing the receiving cavity, and the seal 8 is installed in the second mounting groove 21. The second mounting groove 21 is annular, and the seal 8 is also annular. The seal 8 is used to achieve the sealing of the receiving cavity, so that the fiber optic distribution box can meet the IP68 waterproof sealing requirements and is suitable for outdoor environments.

[0049] In some embodiments, the first cover 1 and the second cover 2 are detachably connected. This facilitates the disassembly and maintenance of the fiber optic distribution box by personnel. For example, if the finished fiber optic distribution box is found to have substandard optical performance, waterproof sealing performance, or other items during inspection, the first cover 1 and the second cover 2 can be disassembled for inspection and maintenance without scrapping the entire fiber optic distribution box.

[0050] Please see Figure 3 , Figure 4 and Figure 8 In some embodiments, the first cover 1 has a plurality of fourth through holes 14, and the second cover 2 has a plurality of fifth through holes 22. The fiber optic distribution box also includes a plurality of fastening components, which are detachably inserted through the fourth through holes 14 and the fifth through holes 22, respectively, to detachably fasten the first cover 1 and the second cover 2 together. Specifically, the fastening components may include bolts 91 and nuts 92. Bolts 91 are inserted through the fourth through holes 14 and the fifth through holes 22, and nuts 92 are fastened to the second cover 2 at positions corresponding to the fifth through holes 22 on the bottom surface of the second cover 2 away from the first cover 1, thereby achieving detachable fastening of the first cover 1 and the second cover 2 together.

[0051] like Figure 8As shown, in some embodiments, the second cover 2 is further provided with a plurality of mounting holes 23, which are used to fix the second cover 2 to an external anchor. Specifically, the number of mounting holes 23 can be single or multiple. External anchors include walls, manholes, utility poles, etc. That is, the fiber optic distribution box can be installed on a wall, manhole, or utility pole by the cooperation of the mounting holes 23 and fasteners. The shape of the mounting holes 23 can be specifically selected according to the installation position of the fiber optic distribution box and the structure of the fasteners. For example, Figure 8 In the illustrated embodiment, the second cover 2 is provided with an elliptical mounting hole 23 and a rectangular mounting hole 23. The area of ​​the rectangular mounting hole 23 is larger than that of the elliptical mounting hole 23. The elliptical mounting hole 23, together with the expansion plug and screw, can fix the second cover 2 to a wall or manhole, realizing the wall-mounted installation of the fiber optic distribution box. The rectangular mounting hole 23, together with the hose clamp, can realize the clamp installation between the fiber optic distribution box and the utility pole.

[0052] The installation steps of the fiber optic splitter box according to one embodiment of this utility model are as follows: Install the input adapter 4, user-end output adapter 5, and cascaded output adapter 6 into the first through hole 11, second through hole 12, and third through hole 13 of the first cover 1, respectively, and tighten the input adapter 4, user-end output adapter 5, and cascaded output adapter 6. Fix the fiber optic coil clamp 72 to the fixing member 71 inside the receiving cavity using screws. Install the control module 31 of the splitter 3 into the first mounting slot 15, coil the input fiber 32 and output fiber 33 of the splitter 3, and fix them to the fiber optic coil clamp 72 to complete the fiber coiling operation. Insert the connectors of the input fiber 32 and output fiber 33 of the splitter 3 into the inner ends of the input adapter 4, user-end output adapter 5, and cascaded output adapter 6, respectively, thus completing the assembly of the components inside the first cover 1 of the fiber optic splitter box. At this point, the optical signal link inside the fiber optic splitter box is connected. Subsequently, the sealing element 8 is installed into the second mounting groove 21 of the second cover 2, and the positions of the first cover 1 and the second cover 2 are aligned. A hexagonal nut 92 is inserted into the fifth through hole 22 of the second cover 2, and the bolt 91 is passed through the fourth through hole 14 on the first cover 1. The bolt 91 and the nut 92 are tightened with tools to complete the assembly of the fiber optic splitter box.

[0053] It is understood that the above embodiments only illustrate preferred embodiments of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present utility model patent. It should be noted that for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present utility model, all of which fall within the protection scope of the present utility model. Therefore, all equivalent transformations and modifications made within the scope of the claims of the present utility model should fall within the coverage of the claims of the present utility model.

Claims

1. An optical fiber distribution box, characterized by, It includes a first cover (1), a second cover (2), a beam splitter (3), at least one input adapter (4), and multiple user output adapters (5); The first cover (1) is provided with a receiving cavity, at least one first through hole (11) and a plurality of second through holes (12), wherein the first through hole (11) and the second through hole (12) are respectively connected to the receiving cavity; All of the beam splitters (3) are located inside the receiving cavity; The input adapter (4) corresponds to the first through hole (11). A portion of each input adapter (4) is located inside the receiving cavity, and the other portion of each input adapter (4) extends out of the receiving cavity through the first through hole (11). The input end of each input adapter (4) is used to connect to the trunk optical cable, and the output end of each input adapter (4) is connected to the beam splitter (3). The user terminal output adapter (5) and the second through hole (12) correspond one-to-one. One part of each user terminal output adapter (5) is located inside the receiving cavity, and the other part of each user terminal output adapter (5) extends out of the receiving cavity through the second through hole (12). The output end of each user terminal output adapter (5) is used to connect to the user terminal distribution optical cable, and the input end of each user terminal output adapter (5) is connected to the splitter (3). The second cover (2) is connected to the first cover (1) to close the receiving cavity.

2. The fiber distribution box of claim 1, wherein, The fiber optic splitter box also includes at least one cascaded output adapter (6). The first cover (1) is also provided with at least one third through hole (13). The third through hole (13) is connected to the receiving cavity. The cascaded output adapter (6) corresponds to the third through hole (13). A part of each cascaded output adapter (6) is located inside the receiving cavity. The other part of each cascaded output adapter (6) extends out of the receiving cavity through the third through hole (13). The input end of the cascaded output adapter (6) is connected to the splitter (3). The output end of the cascaded output adapter (6) is used to cascade another fiber optic splitter box.

3. The fiber distribution box of claim 1, wherein, The fiber optic distribution box also includes a fiber coil fixing unit, and the first cover (1) is also provided with a first mounting groove (15) inside the receiving cavity. The splitter (3) includes a control module (31), an input fiber (32) and an output fiber (33). The input fiber (32) is connected to the output end of the input adapter (4), and the output fiber (33) is connected to at least the input end of the user output adapter (5). The control module (31) is fitted and fixed to the first mounting slot (15), and the fiber coil fixing unit fixes the coiled input fiber (32) and output fiber (33).

4. The fiber distribution box of claim 3, wherein, The fiber coil fixing unit includes a fixing member (71) and at least one fiber coil clamp (72). The fixing member (71) is located in the receiving cavity and connected to the first cover (1). The fiber coil clamp (72) is connected to the fixing member (71) and clamps and fixes the coiled input fiber (32) and output fiber (33).

5. The fiber distribution box of claim 1, wherein, Each of the user terminal output adapters (5) is arranged at intervals along a first horizontal direction (A1) and a second horizontal direction (A2), wherein the first horizontal direction (A1) and the second horizontal direction (A2) are perpendicular to each other; At least along the first horizontal direction (A1), the central axes of each of the user terminal output adapters (5) are not parallel, so that an outwardly expanding angle (U) is formed between two adjacent user terminal output adapters (5).

6. The fiber optic distribution box according to claim 1, characterized in that, The fiber optic distribution box also includes a sealing element (8) disposed between the first cover (1) and the second cover (2).

7. The fiber optic distribution box according to claim 6, characterized in that, The second cover (2) has a second mounting groove (21) on the side facing the receiving cavity, and the sealing element (8) is installed in the second mounting groove (21); And / or, the seal (8) is annular.

8. The fiber optic distribution box according to claim 1, characterized in that, The first cover (1) and the second cover (2) are detachably connected.

9. The fiber optic distribution box according to claim 8, characterized in that, The first cover (1) is provided with several fourth through holes (14), and the second cover (2) is provided with several fifth through holes (22). The fiber optic distribution box also includes several fastening components. The fastening components are detachably inserted through the fourth through holes (14) and the fifth through holes (22) respectively, so as to detachably fasten the first cover (1) and the second cover (2) together.

10. The fiber optic distribution box according to claim 1, characterized in that, The second cover (2) is also provided with a number of mounting holes (23), which are used to fix the second cover (2) to an external anchor.

Images