Optical fiber access box

Abstract

This application discloses a fiber optic access box, belonging to the field of fiber optic communication technology. The fiber optic access box includes a bottom shell, a top cover, a cable reel, and an optical cable. The top cover is detachably connected to the bottom shell, and the top cover is connected to the bottom shell in different connection positions by rotation; the cable reel is rotatably located within a receiving cavity formed by the top cover and the bottom shell. The optical cable has a first connector and a second connector at each end, and the optical cable is coiled around the cable reel. The side of the top cover facing the bottom shell has a first cable outlet, and the side of the cable reel facing the top cover has a third cable outlet, which is used to connect with the first cable outlet to facilitate the exit of the cable segment of the optical cable connected to the first connector. The side of the bottom shell opposite the top cover has a second cable outlet for exiting the cable segment of the optical cable connected to the second connector. This fiber optic access box allows the top cover to be installed in multiple directions relative to the bottom shell, achieving multi-directional cable exit and ensuring that the cable exit position corresponds to the fiber entry position in the specific application scenario. This simplifies the assembly operation of the fiber optic access box.

Description

Technical Field

[0001] This application relates to the field of optical fiber communication technology, and in particular to an optical fiber access box. Background Technology

[0002] Fiber optic access boxes, such as fiber optic terminal boxes, are used to interface with optical network equipment. For example, a fiber optic terminal box interfaces with an optical network unit (ONU) or an optical network terminal (ONT) to enable Fiber to the Home (FTTH), Fiber to the Office (FTTO), or Fiber to the Room (FTTR).

[0003] In related technologies, fiber optic terminal boxes can accommodate and manage excess fiber optic cable length. They include a top cover, a bottom shell, and a cable reel. The cable reel is rotatably disposed within the receiving space formed by the top cover and bottom shell. The cable reel is used to wind the fiber optic cable, which is led out through a cable outlet. The cable outlet is obtained by the connection of an upper opening at the bottom of the top cover and a lower opening at the top of the bottom shell. Rotating the cable reel allows the fiber optic cable to be retracted inwards or pulled outwards.

[0004] Because the fiber optic cable inlet location is uncertain in different application scenarios, the cable outlet and fiber optic cable inlet location do not correspond after the fiber optic terminal box is installed on the wall. This requires readjusting the installation position of the fiber optic terminal box on the wall, making the assembly process of the fiber optic terminal box more complicated. Utility Model Content

[0005] This application provides a fiber optic access box that can solve the technical problems existing in related technologies. Specifically, the technical solution is as follows.

[0006] In a first aspect, an optical fiber access box is provided, comprising: a bottom shell, a top cover, a cable reel, and an optical cable; the top cover is detachably connected to the bottom shell, and the top cover is configured to be connected to the bottom shell by rotation in different connection positions; the cable reel is rotatably located within a receiving cavity formed by the top cover and the bottom shell; the two ends of the optical cable are respectively provided with a first connector and a second connector, and the optical cable is coiled around the cable reel; the side of the top cover facing the bottom shell has a first cable outlet, and the side of the cable reel facing the top cover has a third cable outlet, the third cable outlet being used to mate with the first cable outlet to facilitate the lead-out of the cable segment of the optical cable connected to the first connector; the side of the bottom shell opposite to the top cover has a second cable outlet for leading out the cable segment of the optical cable connected to the second connector.

[0007] The fiber optic access box provided in this application embodiment has a combined cable outlet formed by connecting the first and third cable outlets. This ensures that the cable segment connecting the first connector to the optical cable can be smoothly led out, avoiding problems such as twisting. Compared to related technologies that use a top cover and a bottom shell to form a combined cable outlet, the combined cable outlet design of this application embodiment is no longer limited by the installation position of the bottom shell. After the bottom shell is installed and fixed, the top cover can be connected to the bottom shell in different connection positions by rotation, allowing the top cover to be installed in multiple directions relative to the bottom shell. Correspondingly, the position of the first cable outlet on the top cover also changes with the installation position of the top cover. This enables multi-directional cable outflow from the fiber optic access box, ensuring that the cable outflow position corresponds to the fiber inlet position in the specific application scenario. This not only simplifies the assembly operation of the fiber optic access box but also effectively reduces the risk of the optical cable bending and being exposed at the first cable outlet position.

[0008] In some possible implementations, the inner wall of the bottom shell has a first snap-fit ​​structure, and the inner wall of the top cover has a second snap-fit ​​structure, with the first snap-fit ​​structure and the second snap-fit ​​structure being adapted to engage. Snap-fit ​​connections not only have the advantage of a simpler structural arrangement but also offer convenient assembly and disassembly.

[0009] In some possible implementations, at least one of the first and second snap-fit ​​structures is arranged in multiple sets at intervals along the rotation direction. This allows the top cover to achieve a snap-fit ​​connection with the bottom shell based on the aforementioned snap-fit ​​structure when rotated to different connection positions.

[0010] In some possible implementations, the number of one of the first and second snap-fit ​​structures is greater than the number of the other. This allows the top cover to snap-fit ​​with the bottom shell in various installation orientations with different rotation angles, while also simplifying the arrangement of the snap-fit ​​structures.

[0011] In some possible implementations, the outer contours of both the bottom shell and the top cover are square, the first snap-fit ​​structure is disposed on the four inner sidewalls of the bottom shell, and the second snap-fit ​​structure is disposed on two of the oppositely arranged inner sidewalls of the top cover.

[0012] This design allows for four different mounting orientations of the top cover relative to the bottom shell, enabling four-way cable routing. Furthermore, regardless of the mounting orientation, the square shape of the top cover ensures edge-to-edge alignment with the bottom shell, reducing installation errors and enhancing the aesthetics of the fiber optic access box, making it easily integrated into home environments. Moreover, the four inner sidewalls of the square are perpendicularly distributed at 90°, with the four sets of first snap-fit ​​structures on the bottom shell evenly covering the four sidewalls, and the two sets of second snap-fit ​​structures on the top cover arranged opposite each other. This design allows for two-point symmetrical stress distribution in the snap-fit ​​state, resulting in a more balanced stress distribution and improved structural stability of the fiber optic access box.

[0013] In some possible implementations, the surface of the cable reel facing the top cover has two sets of protruding baffles arranged at intervals, one end of which extends to the outside of the cable reel; the third cable outlet is formed between the two sets of baffles.

[0014] The baffles are raised on the surface of the first tray, creating a channel of a certain depth between the two sets of baffles. This design, forming the third cable outlet, not only facilitates the directional routing of the optical cable to the outside of the fiber optic access box, but also provides protection for the optical cable through the raised baffles.

[0015] In some possible implementations, the spacing between the two sets of baffles decreases from large to small along the radially outward direction of the cable reel. During cable threading, the optical cable can easily enter the wider entrance of the third cable outlet without requiring precise alignment with a narrow channel. As the optical cable moves radially outward, the channel between the two sets of baffles narrows, automatically guiding the optical cable to a preset exit path, thus directionally leading it out and improving cable exit efficiency.

[0016] In some possible implementations, along the radial outward direction of the cable reel, the baffle includes a first segment and a second segment distributed sequentially; the spacing between the first segments of the two sets of baffles gradually decreases along the radial outward direction; the second segments of the two sets of baffles are arranged at equal intervals, and the spacing between the second segments of the two sets of baffles is less than or equal to the minimum spacing between the first segments of the two sets of baffles.

[0017] In some possible implementations, the inner sidewall of the baffle has protrusions, and the protrusions of the two sets of baffles are arranged opposite to each other for clamping the optical cable.

[0018] The opposing protrusions can form a clamping force from both sides of the optical cable, precisely limiting the optical cable to the preset path of the third cable outlet. This effectively prevents axial / radial displacement of the optical cable caused by external pulling, box vibration or internal wiring adjustment, ensuring the assembly stability of the optical cable and reducing the risk of signal failure.

[0019] In some possible implementations, the inner wall of the top cover has two sets of limiting blocks arranged at intervals, forming a limiting cavity between the two sets of limiting blocks; the ends of the two sets of baffles located outside the cable reel are located within the limiting cavity.

[0020] The limiting cavity and the end of the baffle cooperate to provide precise guidance for the top cover. Therefore, when assembling the top cover, you only need to align the end of the baffle with the limiting cavity and insert it to quickly determine the accurate assembly position of the top cover relative to the cable reel. There is no need to repeatedly adjust the alignment, which significantly reduces the positioning error during assembly and improves production efficiency.

[0021] In some possible implementations, the inner wall of the top cover has guide posts for guiding the top cover to be centrally assembled relative to the bottom shell.

[0022] In some possible implementations, the side of the cable reel facing the top cover has a first limiting structure for limiting the first connector.

[0023] In some possible implementations, at least one of the top cover and the bottom shell has a second limiting structure on its exterior for securing the second connector. When the fiber optic access box is in storage mode, the second limiting structure is used to store and secure the second connector outside the fiber optic access box. In storage mode, the fiber optic access box only needs to accommodate one connector, making it more compact.

[0024] Secondly, another type of fiber optic access box is provided, comprising: a bottom shell, a top cover, a cable reel, and an optical cable; the top cover closes to the bottom shell, and the cable reel is rotatably located within a receiving cavity formed by the top cover and the bottom shell; the cable reel is connected to the top cover for synchronous rotation of the cable reel and the top cover relative to the bottom shell; the two ends of the optical cable have a first connector and a second connector, respectively, and the optical cable is coiled around the cable reel; an adapter is provided on the side of the cable reel facing the top cover, and the adapter is connected to the first connector; the side of the top cover facing the bottom shell has an opening for exposing the optical interface of the adapter; the side of the bottom shell opposite to the top cover has a second cable outlet for leading out the cable segment of the optical cable connected to the second connector.

[0025] The fiber optic access box provided in this application embodiment has an opening on the side of the top cover facing the bottom shell. This opening exposes the optical interface of the adapter, ensuring that the adapter's optical interface is led out and exposed. Compared to related technologies where the top cover and bottom shell together form a combined opening, this application embodiment places the opening separately on the top cover, no longer limited by the installation position of the bottom shell. After the bottom shell is installed and fixed, the cable reel and top cover can rotate synchronously relative to the bottom shell, allowing for multi-directional installation of the top cover relative to the bottom shell. Correspondingly, the position of the opening on the top cover changes according to the installation orientation of the top cover, enabling multi-directional cable exit from the fiber optic access box and ensuring that the cable exit position corresponds to the fiber entry position in the specific application scenario. This simplifies the assembly operation of the fiber optic access box.

[0026] In some possible implementations, the cable reel has a locked state and an unlocked state. In the locked state, the cable reel is locked to the bottom shell. In the unlocked state, the cable reel and the top cover can rotate synchronously relative to the bottom shell.

[0027] When the fiber optic access box is in the locked state, the cable reel is locked to the bottom shell, and correspondingly, the top cover is also locked relative to the bottom shell. When the fiber optic access box is in the unlocked state, the top cover can rotate relative to the bottom shell, thereby allowing adjustment of the installation orientation of the top cover relative to the bottom shell. This design allows for adjustment of the installation orientation of the top cover without opening it.

[0028] In some possible implementations, the bottom shell includes a bottom plate and a fixed shaft connected to the bottom plate. The cable reel includes a cable reel cylinder rotatably fitted onto the fixed shaft. The inner sidewall of the cable reel cylinder has a first rib. The fixed shaft is elastically deformable in the radial direction and has a second rib on its outer sidewall. The second rib is used to stop against the first rib to limit the cable reel in the axial direction of the cable reel in the locked state.

[0029] The second rib on the outer side wall of the fixed shaft can stop the first rib on the inner side wall of the cable reel, thereby achieving axial locking of the cable reel. When it is necessary to release the axial locking of the cable reel, the top cover can be pulled up. Since the fixed shaft can elastically deform in the radial direction, the second rib will retract under the compression of the first rib, thereby releasing the stop between the first and second ribs.

[0030] In some possible implementations, the side of the cable reel facing the base plate has a first stop block, and the base plate has a second stop block, the second stop block stopping against the first stop block to limit the cable reel in the circumferential direction of the cable reel in the locked state.

[0031] The first stop block on the cable reel and the second stop block on the base plate act as a stop, thereby achieving circumferential locking of the cable reel. When it is necessary to release the circumferential locking of the cable reel, the first and second ribs can be released by pulling up the top cover, and the cable reel is lifted synchronously, thereby releasing the stop between the first stop block on the cable reel and the second stop block on the base plate.

[0032] In some possible implementations, the inner wall of the cable reel has a first rib, the fixed shaft is elastically deformable in the radial direction, and the outer wall of the fixed shaft has a third rib; this arrangement can prevent the combined structure formed by the cable reel and the top cover from separating from the bottom shell when the cable reel is in the unlocked state.

[0033] The third rib is used to stop the first rib, thereby limiting the cable reel in the axial direction of the cable reel in the unlocked state. This arrangement can prevent the combined structure formed by the cable reel and the upper cover from separating from the bottom shell when the cable reel is in the unlocked state.

[0034] In some possible implementations, the fiber optic access box further includes a cable reel structure located on the surface of the cable reel facing the top cover, and the cable reel structure is located on the rotating side of the cable reel, the cable reel structure being used for winding the optical cable.

[0035] In this embodiment, a cable coiling structure is provided on the side of the cable reel's shaft. In this way, the cable segment of the optical cable located on the upper layer of the cable reel is coiled around the cable coiling structure instead of the cable reel tube, which effectively utilizes the horizontal idle space of the cable reel and avoids occupying a large vertical space. This helps to reduce the thickness of the optical fiber access box to a certain extent.

[0036] In some possible implementations, the fiber optic access box further includes a mounting backplate having a first mounting structure; the bottom shell has a second mounting structure on the side opposite to the top cover, the second mounting structure being detachably connected to the first mounting structure.

[0037] By pre-installing a mounting backplate onto the wall, the assembled fiber optic access box assembly can be installed onto the backplate, thus completing the installation of the fiber optic access box. This setup offers at least the following advantages: easier maintenance and repair, and improved assembly efficiency.

[0038] In some possible implementations, the first mounting structure is a hook, and the second mounting structure is a hanging groove.

[0039] In some possible implementations, the free end of the hook has an inclined guide surface on the side near the hanging groove, the guide surface being used to guide the bottom shell from the initial installation position on the mounting back plate to the final installation position.

[0040] The guide surface provides a clear direction for the installation of the base shell, facilitating a quick connection between the base shell and the mounting backplate. Furthermore, the guide surface precisely guides the movement of the base shell, ensuring it accurately reaches the final installation position, thus enabling a precise fit between the hook and the mounting slot.

[0041] In some possible implementations, the surface of the mounting backplate facing the bottom shell has an indicator mark for indicating the initial mounting position of the bottom shell on the mounting backplate.

[0042] Indicator markers can provide clear visual guidance for installers, enabling them to quickly and accurately place the base shell in the correct initial position on the mounting backplate, reducing the time spent searching for and adjusting the position during installation, improving installation efficiency, reducing installation difficulty, and ensuring installation accuracy. Attached Figure Description

[0043] Figure 1 A combined diagram of an exemplary fiber optic access box provided in an embodiment of this application;

[0044] Figure 2 for Figure 1 An exploded view of the fiber optic access box shown.

[0045] Figure 3 for Figure 1 The cross-sectional view of the fiber optic access box along the xy direction is shown.

[0046] Figure 4 for Figure 1 The diagram shows the first assembly of the top cover and cable tray of the fiber optic access box.

[0047] Figure 5 for Figure 1 The diagram shows the four-way cable output of the fiber optic access box.

[0048] Figure 6 for Figure 1 The cross-sectional view of the fiber optic access box along the zy direction is shown.

[0049] Figure 7 for Figure 1 The diagram shows the structural layout of the bottom shell of the fiber optic access box from a top-down perspective.

[0050] Figure 8 for Figure 1 The diagram shows the structure of the bottom shell of the fiber optic access box from a downward viewing angle.

[0051] Figure 9 for Figure 1 The diagram shows the structure of the upper cover of the fiber optic access box from a downward viewing angle.

[0052] Figure 10 for Figure 1 A schematic diagram of the combined structure of the upper cover and cable tray in the fiber optic access box shown;

[0053] Figure 11 for Figure 10 A magnified view of a portion of the image;

[0054] Figure 12 for Figure 1 A schematic diagram of the cable tray structure in the fiber optic access box shown;

[0055] Figure 13 A schematic diagram of the structure of an exemplary fiber optic access box in the fiber output state provided in the embodiments of this application;

[0056] Figure 14 A schematic diagram of the structure of an exemplary fiber optic access box in storage state provided in an embodiment of this application;

[0057] Figure 15 A combined diagram of another exemplary fiber optic access box provided in an embodiment of this application;

[0058] Figure 16 for Figure 15 A cross-sectional view of the fiber optic access box shown.

[0059] Figure 17 A schematic diagram of an exemplary mounting backplate provided in an embodiment of this application;

[0060] Figure 18 A combined diagram of another exemplary fiber optic access box provided in the embodiments of this application;

[0061] Figure 19 for Figure 18 An exploded view of the fiber optic access box shown.

[0062] Figure 20 for Figure 18 The diagram shows the structure of the bottom shell of the fiber optic access box.

[0063] Figure 21 for Figure 18 The cross-sectional view of the fiber optic access box along the xz direction is shown.

[0064] Figure 22 for Figure 18 The image shows a cross-sectional view of the fiber optic access box along the xy direction with the cable reel locked.

[0065] Figure 23 for Figure 18 The image shows a cross-sectional view of the fiber optic access box along the xy direction with the cable tray unlocked.

[0066] Figure 24 for Figure 18A schematic diagram of the cable tray structure in the fiber optic access box is shown.

[0067] Figure 25 for Figure 24 A cross-sectional view of the cable reel shown;

[0068] Figure 26 for Figure 18 The diagram shows the combination of the upper cover and cable tray in the fiber optic access box.

[0069] Figure 27 for Figure 18 The diagram shows an exploded view of the top cover and cable tray in the fiber optic access box.

[0070] The reference numerals in the attached figures represent:

[0071] 100. Bottom shell;

[0072] 11. Second cable outlet; 12. First snap-fit ​​structure; 13. Second limiting structure; 14. Second mounting structure;

[0073] 101. Base plate; 1011. Second stop block; 102. Fixed shaft; 1021. Second rib; 1022. Third rib; 1023. First buckle; 103. Inner wall of bottom shell; 104. Side wall of bottom shell;

[0074] 200. Top cover;

[0075] 21. First cable outlet; 22. Second snap-fit ​​structure; 23. Limiting block; 230. Limiting cavity; 24. Guide post; 25. Second buckle; 26. Opening;

[0076] 201. Top slab; 202. Side walls of the upper cover; 203. Inner wall of the upper cover;

[0077] 300. Cable reel;

[0078] 31. First cable reel; 311. Third cable outlet; 312. Baffle; 3121. First section; 3122. Second section; 3123. Protrusion; 313. First limiting structure; 3131. Main limiting plate; 3132. Tail limiting plate; 314. Cable reel structure; 315. Cable passage hole; 31. Barrier strip; 317. Clip groove; 318. Third limiting structure;

[0079] 32. Second plate; 321. First stop block;

[0080] 33. Cable reel; 331. First rib;

[0081] 400. Optical fiber cable;

[0082] 41. First connector; 42. Second connector; 43. Adapter; 430. Optical interface;

[0083] 500、 Install back panel;

[0084] 51. First mounting structure; 511. Guide surface; 52. Indicator mark. Detailed Implementation

[0085] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0086] Some exemplary embodiments are illustrated in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. In the description of the embodiments of this application, it should be understood that some directional terms, such as "upper," "lower," "top," "bottom," "axial," and "radial," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These are only for the convenience of describing the embodiments of this application and simplifying the description, 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 embodiments of this application.

[0087] Fiber optic access boxes, such as fiber optic terminal boxes, are used to interface with optical network equipment. For example, a fiber optic terminal box interfaces with an optical network unit (ONU) or an optical network terminal (ONT) to enable Fiber to the Home (FTTH), Fiber to the Office (FTTO), or Fiber to the Room (FTTR).

[0088] An application scenario for a fiber optic terminal box can be as follows: Two fiber optic terminal boxes are installed indoors. The upstream fiber optic terminal box is connected to a fiber distribution box via optical cable, and the downstream fiber optic terminal box is connected to the upstream fiber optic terminal box via optical cable. Furthermore, the downstream fiber optic terminal box is also used to connect indoor optical network equipment. The fiber distribution box, also known as a fiber cable distribution box (FDB) or fiber access terminal (FAT), can be installed in a hallway. The optical cable can also be referred to as an optical fiber.

[0089] Because the distances between the fiber distribution box and the upstream fiber optic terminal box, and between the upstream and downstream fiber optic terminal boxes, are uncertain, the required lengths of optical cable between the fiber distribution box and the fiber optic terminal box, as well as between the two fiber optic terminal boxes, are also uncertain. Furthermore, for ease of on-site installation, pre-connected optical cables are generally used. These pre-connected cables have connectors pre-connected at both ends. This eliminates the need for on-site fiber splicing; simply connect one connector to the fiber distribution box and the other to the fiber optic terminal box. Alternatively, connect one connector to the upstream fiber optic terminal box and the other to the downstream fiber optic terminal box, which is quite convenient. However, the length of the pre-connected optical cable is rarely exactly the same as the required cable length. This results in cables that are generally too long, making storage difficult and unsightly.

[0090] Therefore, there is a need for a fiber optic terminal box capable of accommodating and managing excess fiber optic cable length. This type of terminal box includes a top cover, a bottom shell, and a cable reel. The cable reel is rotatably disposed within the receiving space formed by the top cover and bottom shell. The cable reel is used to wind the fiber optic cable, which extends to the outside through a cable outlet. The cable outlet is formed by the connection of an upper opening at the bottom of the top cover and a lower opening at the top of the bottom shell. By rotating the cable reel, the fiber optic cable can be retracted inwards or pulled outwards. Thus, the fiber optic cable can be pulled outwards to the required length as needed, and excess cable length can be stored inside the fiber optic terminal box, thereby improving the aesthetics and reliability of the fiber optic cabling.

[0091] However, in related technologies, the cable outlet is formed by the connection of an upper opening at the bottom of the top cover and a lower opening at the top of the bottom shell. This makes the installation position of the top cover relative to the bottom shell fixed. Once the bottom shell is installed on the wall, the positions of the top cover and the cable outlet are also determined. Because the fiber inlet position is uncertain in different application scenarios, the cable outlet and fiber inlet positions do not correspond after the fiber optic terminal box is installed on the wall. For example, the fiber inlet position may be located on the left side of the fiber optic terminal box, while the cable outlet is located on the bottom side. This requires the fiber optic terminal box to be readjusted on the wall, complicating the assembly process. Alternatively, the optical cable leading from the cable outlet may be bent to correspond to the fiber inlet position, which is not conducive to cable concealment and increases the risk of cable exposure.

[0092] In view of the above-mentioned technical problems, this application provides a fiber optic access box suitable for multi-directional cable output. The following describes the multi-directional cable output scheme in conjunction with fiber optic access boxes with adapter 43 and fiber optic access boxes without adapter 43.

[0093] Firstly, this application describes a scheme for a fiber optic access box (hereinafter referred to as fiber optic access box A) that does not include an adapter 43 and is suitable for multi-directional cable output.

[0094] Figures 1-17 The structural layout of fiber optic access box A is illustrated in the example. Specifically, Figure 1 The diagram shows the external appearance of the fiber optic access box A. Figure 2 An exploded view of the fiber optic access box A is shown. Figure 3 A cross-sectional view of the fiber optic access box is shown. Figure 3 A diagram showing the combination of the top cover 200 and the cable tray 300 in the fiber optic access box is provided.

[0095] As attached Figure 1 and attached Figure 2 As shown, the fiber optic access box includes a bottom shell 100, a top cover 200, a cable reel 300, and an optical cable 400. The top cover 200 is detachably connected to the bottom shell 100 and is configured to be connected to the bottom shell 100 by rotation in different connection positions. The cable reel 300 is rotatably located within a receiving cavity formed by the top cover 200 and the bottom shell 100.

[0096] The optical cable 400 has a first connector 41 and a second connector 42 at both ends, and the optical cable 400 is coiled on the cable reel 300. The side of the upper cover 200 facing the bottom shell 100 has a first cable outlet 21, and the side of the cable reel 300 facing the upper cover 200 has a third cable outlet 311. The third cable outlet 311 is used to connect with the first cable outlet 21 (see...). Figure 4 The bottom housing 100 has a second cable outlet 11 on the side opposite to the top cover 200, for leading out the cable segment of the optical cable 400 connected to the second connector 42.

[0097] For example, the first connector 41 and the second connector 42 can each be an LC connector or an SC connector independently. One of the first connector 41 and the second connector 42 is used to connect to a fiber distribution box or other optical access device externally, and the other is used to connect to indoor optical network equipment internally.

[0098] Users can deliver the first connector 41 and the second connector 42 at both ends of the optical cable 400 to their respective connection positions by pulling the cable outward. During the pulling process, the cable reel 300 can rotate and release the optical cable 400. When pulling the optical cable 400 stops, the excess length of the optical cable 400 can be wound around the cable reel 300, thus storing the excess optical cable 400 and improving the aesthetics and reliability of the optical cable wiring.

[0099] It should be noted that the upper cover 200 and the bottom shell 100 have multiple connection positions, and the upper cover 200 is detachably connected to the bottom shell 100 at each connection position. By rotating the upper cover 200 (for example, rotating it with the central axis of the upper cover 200 as the pivot), the upper cover 200 can be switched between different connection positions, allowing the upper cover 200 to connect to the bottom shell 100 at different connection positions. Since the first cable outlet 21 is located on the upper cover 200, changing the connection position of the upper cover 200 will cause the position of the first cable outlet 21 to change, ultimately achieving the purpose of adjusting the cable outlet position of the fiber optic access box. Specifically, the upper cover 200 connecting to the bottom shell 100 at different connection positions by rotation can be achieved by rotating the upper cover 200 in a separated state from the bottom shell 100, changing the connection position, and connecting to the bottom shell 100 at each different connection position. During the rotation, the upper cover 200 needs to detach from the bottom shell 100. Of course, it cannot be ruled out that in some cases, when the upper cover 200 is connected to the bottom shell 100 and grounded, the connection position can be changed by rotation. In this case, the upper cover 200 and the cable reel 300 can rotate synchronously.

[0100] The cable outlet formed by connecting the first cable outlet 21 and the third cable outlet 311 of the fiber optic access box is referred to as the combined cable outlet. The following description, in conjunction with the combined cable outlet, further describes how the fiber optic access box changes its cable outlet orientation.

[0101] When the fiber optic access box is fixedly installed on a wall (specifically, its bottom shell 100 is installed on the wall), and the fiber optic access box needs to connect to a specific optical path scenario, if the fiber inlet position of the current optical path scenario does not correspond to the combined cable outlet position of the fiber optic access box, the top cover 200 can be opened, the cable reel 300 rotated, and the third cable outlet 311 adjusted to a suitable cable outlet position. Then, the top cover 200 is rotated again to adjust the first cable outlet 21 to the same cable outlet position as the third cable outlet 311. That is, the connection position of the top cover 200 relative to the bottom shell 100 is changed. Finally, the top cover 200 is reconnected to the bottom shell 100 at the adjusted connection position.

[0102] The fiber optic access box provided in this application embodiment has a combined cable outlet formed by connecting the first cable outlet 21 and the third cable outlet 311. This ensures that the cable segment of the optical cable 400 connected to the first connector 41 can be smoothly led out, avoiding problems such as twisting. Compared to the related technology where the upper cover 200 and the bottom shell 100 are used together to form a combined cable outlet, the combined cable outlet design of this application embodiment is no longer limited by the installation position of the bottom shell 100. After the bottom shell 100 is installed and fixed, the upper cover 200 can be connected to the bottom shell 100 in different connection positions by rotating, thus allowing the upper cover 200 to be installed in multiple directions relative to the bottom shell 100. Correspondingly, the position of the first cable outlet 21 on the upper cover 200 also changes accordingly with the installation position of the upper cover 200. This enables multi-directional cable output of the fiber optic access box, ensuring that the cable output position corresponds to the fiber input position in the specific application scenario. This not only simplifies the assembly of the fiber optic access box, but also effectively reduces the risk of the optical cable 400 bending and being exposed at the first outlet 21.

[0103] The structure of the cable tray 300 in this type of fiber optic access box A is described below.

[0104] In some examples, such as the attached Figure 3 As shown, the cable reel 300 includes a first reel 31, a second reel 32, and a cable drum 33. The first reel 31 and the second reel 32 are spaced apart along the axial direction of the cable drum 33. The cable drum 33 is rotatably connected to the bottom shell 100, and the second reel 32 is close to the bottom shell 100. The optical cable 400 passes through the first reel 31 (see...). Figure 12 The first reel 31 is provided with a cable pass-through hole 315, through which the optical cable 400 passes. A first portion of the optical cable 400 is wound around the portion of the cable reel 33 located on the side of the first reel 31 opposite to the second reel 32, and the free end of the first portion of the optical cable 400 has a first connector 41. A second portion of the optical cable 400 is wound around the portion of the cable reel 33 located between the first reel 31 and the second reel 32, and the free end of the second portion of the optical cable 400 has a second connector 42.

[0105] To prevent the first section of the optical cable 400 from detaching from the cable drum 33 above the first reel 31, as shown in the attached... Figure 12 As shown, a blocking strip 316 can also be provided on the outer wall of the cable reel 33 above the first reel 31. One end of the blocking strip 316 is connected to the outer wall of the cable reel 33, and the other end of the blocking strip 316 extends outward along the radial direction of the first reel 31, thereby confining the optical cable 400 between the first reel 31 and the blocking strip 316. To improve the confining effect on the optical cable 400, multiple blocking strips 316 can be provided, and the multiple blocking strips 316 are distributed at intervals along the circumferential direction of the cable reel 33.

[0106] Since the first section of the optical cable 400 needs to be led out to the outside of the optical fiber access box during application, specifically introduced in the area between the first reel 31 and the upper cover 200, in order to ensure that the optical cable 400 can be led out smoothly and to avoid twisting during the lead-out process, this embodiment of the application provides a third cable outlet 311 in the first reel 31. The third cable outlet 311 is connected with the first cable outlet 21 to form a combined cable outlet. The combined cable outlet is used to lead out the first section of the optical cable 400, so as to effectively solve the above-mentioned technical problems.

[0107] Furthermore, Figure 1 and Figure 2 As shown, the first cable outlet 21 can be located at the seam between the upper cover 200 and the bottom shell 100, that is, the first cable outlet 21 passes through the end of the upper cover 200 facing the bottom shell 100.

[0108] The following section further elaborates on the connection method between the bottom shell 100, the top cover 200, and the cable reel 300, taking into account the structure of the bottom shell 100 and the top cover 200, as shown in the attached diagram. Figure 7 As shown, the bottom shell 100 may include a bottom plate 101, a fixed shaft 102, an inner wall 103 of the bottom shell, and a side wall 104 of the bottom shell.

[0109] One end of the fixed shaft 102 is connected to the base plate 101, and the fixed shaft 102 is rotatably connected to the cable reel 300's cable cylinder 33 (the cable cylinder 33 is sleeved outside the fixed shaft 102). Further, Figure 6 and Figure 7 It is also shown that a first buckle 1023 is provided on the outer side wall of the end of the fixed shaft 102 away from the base plate 101, and a first rib 331 is provided at the corresponding position on the inner side wall of the cable reel 33. The first rib 331 abuts against the first buckle 1023, thereby realizing the mutual limiting of the fixed shaft 102 and the cable reel 33 along the axial direction of the cable reel 300.

[0110] The inner wall 103 of the bottom shell is arranged around the fixed shaft 102 and located inside the side wall 104 of the bottom shell. The arrangement of the inner wall 103 can at least serve as a reinforcing rib, enhancing the structural stability of the bottom shell 100. Furthermore, the inner wall 103 of the bottom shell can be annular, which can serve as a positioning ring to guide and position the assembly of the upper cover 200.

[0111] The first end of the bottom shell sidewall 104 is connected to the bottom plate 101, and the second end of the bottom shell sidewall 104 extends in a direction away from the bottom plate 101. The bottom shell sidewall 104 forms the outer contour of the bottom shell 100.

[0112] The second cable outlet 11 is located on the side of the bottom shell 100 opposite to the top cover 200, and is used to lead out the cable segment of the optical cable 400 connecting to the second connector 42. This allows the fiber optic access box to simultaneously have layered cable output functions, both upper and lower layer, avoiding interference when the optical cable 400 exits from both ends. For example, the second cable outlet 11 can be located at the connection between the bottom shell side panel 104 and the bottom plate 101, or it can be opened on the bottom plate 101, or it can be opened at the end of the bottom shell side panel 104 near the bottom plate 101. Furthermore, the first cable outlet 21 and the second cable outlet 11 can be located on different sides of the fiber optic access box to achieve better anti-interference effect.

[0113] As attached Figure 8 As shown, the upper cover 200 may include a top plate 201 and an upper cover side panel 202. A first end of the upper cover side panel 202 is connected to the top plate 201, and a second end of the upper cover side panel 202 extends in a direction away from the top plate 201. The upper cover side panel 202 forms the outer contour of the upper cover 200. When the upper cover 200 is detachably connected to the bottom shell 100, the upper cover side panel 202 is opposite to the bottom shell side panel 104. A first cable outlet 21 is located at the end of the upper cover side panel 202 facing the bottom shell 100.

[0114] Furthermore, the cover 200 may also include an inner wall 203, which is located inside the side wall 202 of the cover and can also serve as a reinforcing rib. The inner wall 203 may be arc-shaped, for example, and based on its open notch arranged in the circumferential direction, it will not interfere with the arrangement of other components in the cover 200.

[0115] In order to achieve multi-directional cable output of fiber optic access box A, the upper cover 200 is detachably connected to the bottom shell 100, so that the upper cover 200 can be installed in multiple directions relative to the bottom shell 100, thereby allowing the upper cover 200 to be easily and conveniently adjusted in its assembly position.

[0116] One exemplary detachable connection method is a snap-fit ​​connection, which not only has the advantages of a simpler structural layout but also convenient assembly and disassembly.

[0117] In view of this, as attached Figure 8 and attached Figure 9 As shown, the inner wall of the bottom shell 100 has a first snap-fit ​​structure 12, and the inner wall of the top cover 200 has a second snap-fit ​​structure 22. The first snap-fit ​​structure 12 and the second snap-fit ​​structure 22 are adapted to snap-fit ​​together.

[0118] In this embodiment of the application, one of the first snap-fit ​​structure 12 and the second snap-fit ​​structure 22 is configured as a snap-fit, and the other is configured as a slot. For example... Figure 9 The second snap-fit ​​structure 22 is shown to be a snap-fit ​​type. Figure 8The first snap-fit ​​structure 12 is shown to be in the form of a snap-fit ​​slot.

[0119] At least one of the first snap-fit ​​structure 12 and the second snap-fit ​​structure 22 is configured as multiple sets arranged at intervals along the aforementioned rotation direction. For example, both the first snap-fit ​​structure 12 and the second snap-fit ​​structure 22 can be configured as multiple sets along the rotation direction. On the one hand, this allows the upper cover 200 to achieve snap-fit ​​connection with the bottom shell 100 based on the aforementioned snap-fit ​​structure when rotated to different connection positions. On the other hand, this also helps to make the snap-fit ​​effect more reliable.

[0120] See Figure 8 and Figure 9 For example, the inner wall of the bottom shell 100 (i.e. the inner wall of the bottom shell sidewall 104) is provided with multiple sets of first snap-fit ​​structures 12 in the circumferential direction, and the inner wall of the top cover 200 (i.e. the inner wall of the top cover sidewall 202) is provided with multiple sets of second snap-fit ​​structures 22 in the circumferential direction, and each set of first snap-fit ​​structures 12 is adapted to snap-fit ​​with each set of second snap-fit ​​structures 22.

[0121] Each group of first snap-fit ​​structures 12 includes one or more first snap-fit ​​structures 12, for example... Figure 8 The example illustrates that each group of first snap-fit ​​structures 12 includes two first snap-fit ​​structures 12 arranged at intervals. Each group of second snap-fit ​​structures 22 includes one or more second snap-fit ​​structures 22, for example, Figure 9 The example shows that each set of second snap-fit ​​structures 22 includes two second snap-fit ​​structures 22 arranged at intervals. This arrangement helps to further improve the snap-fit ​​effect and enhance the connection stability.

[0122] Based on the adaptability of the upper cover 200 to the bottom shell 100 in multiple directions, in order to simplify the arrangement of the snap-fit ​​structure, the number of one of the first snap-fit ​​structure 12 and the second snap-fit ​​structure 22 (the number of sets mentioned above) can be greater than the number of the other. In this way, the upper cover 200 can achieve snap-fit ​​connection with the bottom shell 100 in various installation positions with different rotation angles.

[0123] See also Figure 8 and Figure 9 The outer contours of the bottom shell 100 and the top cover 200 can be square (i.e., the bottom shell sidewall 104 and the top cover sidewall 202 are both square). The first snap-fit ​​structure 12 is provided on the four inner sidewalls of the bottom shell 100, that is, a set of first snap-fit ​​structures 12 is provided on each of the four inner sidewalls of the bottom shell 100. The second snap-fit ​​structure 22 is provided on two of the oppositely arranged inner sidewalls of the top cover 200, that is, a set of second snap-fit ​​structures 22 is provided on each of the two oppositely arranged inner sidewalls of the top cover 200.

[0124] This design allows the upper cover 200 to have four connection positions relative to the bottom shell 100. Each 90° rotation of the upper cover 200 switches between connection positions, which can further enhance its functionality. Figure 5 To elaborate.

[0125] See Figure 5 It illustrates a four-way outgoing cable scheme for a fiber optic access box. Figure 5 The top cover 200 and optical cable 400 are hidden inside, while only the bottom shell 100 and cable reel 300 are retained. The cable outlet position of the cable reel 300 represents the cable outlet position of the top cover 200, which also determines the connection position of the top cover 200.

[0126] Figure 5 Using the second cable outlet 11 of the bottom shell 100 as a reference, Figure 5 Figure a illustrates that the third cable outlet 311 of the cable reel 300 is in the first cable outlet position. At this time, the first cable outlet 21 of the upper cover 200 is also in the first cable outlet position, and correspondingly, the upper cover 200 will be connected to the bottom shell 100 in the first connection position. Figure 5 Based on diagram a, the cable reel 300 is rotated 90° clockwise, as can be seen in [reference needed]. Figure 5 Image b. Figure 5 Figure b illustrates that the third cable outlet 311 of the cable reel 300 is in the second cable outlet position. At this time, the first cable outlet 21 of the upper cover 200 is also in the second cable outlet position, and correspondingly, the upper cover 200 will be connected to the bottom shell 100 in the second connection position. Figure 5 Based on diagram b, cable reel 300 continues to rotate 90° clockwise, as can be seen in... Figure 5 Figure c. Figure 5 Figure c illustrates that the third cable outlet 311 of the cable reel 300 is in the third cable outlet position. At this time, the first cable outlet 21 of the upper cover 200 is also in the third cable outlet position. Correspondingly, the upper cover 200 will be connected to the bottom shell 100 in the third connection position. Figure 5 Based on diagram c, cable reel 300 continues to rotate 90° clockwise, as can be seen in... Figure 5 The d-graph. Figure 5 The diagram illustrates that the third cable outlet 311 of the cable reel 300 is in the fourth cable outlet position. At this time, the first cable outlet 21 of the upper cover 200 is also in the fourth cable outlet position. Correspondingly, the upper cover 200 will connect with the bottom shell 100 in the fourth connection position. It can be seen that the above-mentioned fiber optic access box can realize four-way cable outlet.

[0127] Furthermore, regardless of the installation orientation of the top cover 200, its square shape allows the top cover 200 and the bottom shell 100 to be aligned side by side, which not only helps to reduce the installation error rate but also enhances the aesthetics of the fiber optic access box and makes it easy to integrate into home scenarios.

[0128] Moreover, the four inner sidewalls of the square are distributed vertically at 90°, and the four sets of first snap-fit ​​structures 12 of the bottom shell 100 evenly cover the four sidewalls. The two sets of second snap-fit ​​structures 22 of the top cover 200 are arranged opposite to each other. This design enables two-point symmetrical force to be formed in the snap-fit ​​state, the stress distribution is more balanced, and the structural stability of the fiber optic access box is improved.

[0129] As mentioned above, the surface of the cable reel 300 facing the upper cover 200 is provided with a third cable outlet 311, which can be obtained in the following manner: as shown in the attached figure. Figure 10 As shown, the surface of the cable reel 300 facing the upper cover 200 (i.e. the surface of the first reel 31 facing the upper cover 200) has two sets of protruding baffles 312 arranged at intervals, one end of the baffle 312 extending to the outside of the first reel 31; the third cable outlet 311 is formed between the two sets of baffles 312.

[0130] A baffle 312 protrudes from the surface of the first tray 31, creating a channel of a certain depth between the two sets of baffles 312. The third cable outlet 311 can be provided by the entire channel formed between the two sets of baffles 312, or by the area of ​​the channel located outside the first tray 31. This method of forming the third cable outlet 311 not only facilitates the directional routing of the optical cable 400 to the outside of the optical fiber access box, but also provides protection for the optical cable 400 through the protruding baffles 312.

[0131] Furthermore, as shown in the appendix Figure 12 As shown, the distance between the two sets of baffles 312 decreases from large to small along the radial outward direction of the first disc 31. It should be noted that the distance between the two sets of baffles 312 can be gradually changed, or it can be partially gradually changed and the other part is equidistant. The shape of the baffles 312 can be adaptively designed according to the actual situation.

[0132] By varying the spacing between the two sets of baffles 312 from large to small, the optical cable 400 can easily enter the wider entrance of the third exit port 311 during cable threading, without needing precise alignment with a narrow channel. As the optical cable 400 moves radially outward, the channel between the two sets of baffles 312 narrows, allowing the third exit port 311 to be located in the narrower part of the channel. This automatically guides the optical cable 400 to the preset exit path, directionally leading it out and improving cable exit efficiency.

[0133] Appendix Figure 12As further exemplified, along the radially outward direction of the cable reel 300, the baffle 312 includes a first segment 3121 and a second segment 3122 distributed sequentially; the spacing between the first segments 3121 of the two sets of baffles 312 gradually decreases along the radially outward direction; the second segments 3122 of the two sets of baffles 312 are arranged at equal intervals, and the spacing between the second segments 3122 of the two sets of baffles 312 is less than or equal to the minimum spacing between the first segments 3121 of the two sets of baffles 312.

[0134] The first segments 3121 of the two sets of baffles 312 are spaced apart and symmetrically distributed, and the second segments 3122 of the two sets of baffles 312 are spaced apart and symmetrically distributed. Furthermore, the first segment 3121 has an arc-shaped structure along the cable exit direction, and the second segment 3122 has a straight structure along the cable exit direction.

[0135] Based on the above scheme, the baffle 312 is divided into a gradually changing first segment 3121 and an equidistant second segment 3122. The wider channel between the two sets of first segments 3121 is used to improve the cable output efficiency of the optical cable 400, and the narrower channel between the two sets of second segments 3122 is used to improve the constraint accuracy of the optical cable 400. Moreover, the gradually changing design of the first segment 3121 also allows the optical cable 400 to be distributed in an arc shape in the channel between the two sets of baffles 312, preventing it from being bent sharply.

[0136] In conjunction with any of the above embodiments of baffle 312, in some examples, as shown in the appendix Figure 11 and attached Figure 12 As shown, the inner wall of the baffle 312 has protrusions 3123, and the protrusions 3123 of the two sets of baffles 312 are arranged opposite to each other to clamp the optical cable 400. As a further example, the protrusions 3123 are provided on the inner wall of the second section 3122 of the baffle 312.

[0137] Each baffle 312, such as the inner wall of the second segment 3122, can be provided with one protrusion 3123, or it can be provided as multiple protrusions 3123 spaced apart along the cable outlet direction, for example... Figure 11 and Figure 12 The example shows that the inner sidewall of each second segment 3122 is provided with two spaced protrusions 3123.

[0138] The relatively arranged protrusions 3123 can form a clamping force from both sides of the optical cable 400, precisely limiting the optical cable 400 to the preset path of the third cable outlet 311, effectively preventing the axial / radial displacement of the optical cable 400 caused by external pulling, box vibration or internal wiring adjustment, ensuring the assembly stability of the optical cable 400 and reducing the risk of signal failure.

[0139] In addition, when assembling the top cover 200 and the bottom shell 100 of the fiber optic access box, the cable tray 300 is blocked by the top cover 200. If there is a radial or circumferential offset between the top cover 200 and the cable tray 300, it may cause the top cover 200 and the bottom shell 100 to be misaligned, unable to be properly connected, and the internal optical cable 400 to be deviated from its lead-out path.

[0140] To address the aforementioned technical problems, this application further improves the upper cover 200, as shown in the attached figure. Figure 9 -Appendix Figure 11 As shown, the inner wall of the upper cover 200 has two sets of limiting blocks 23 arranged at intervals, and a limiting cavity 230 is formed between the two sets of limiting blocks 23. The ends of the two sets of baffles 312 located outside the cable reel 300 are located inside the limiting cavity 230.

[0141] Through the above-described scheme, the limiting cavity 230 and the end of the baffle 312 cooperate to provide precise guidance for the upper cover 200. Therefore, during the assembly of the upper cover 200, simply aligning the end of the baffle 312 with the limiting cavity 230 and inserting it quickly determines the accurate assembly position of the upper cover 200 relative to the cable reel 300, eliminating the need for repeated alignment adjustments. This significantly reduces positioning errors during assembly, improves production efficiency, and ensures the fitting accuracy of internal components (such as optical cables and snap-fit ​​structures). Furthermore, this also prevents the cable reel 300 from rotating relative to the upper cover 200, ensuring the cable reel 300 is fixed in place.

[0142] Of course, it is not excluded that the dimensions of the limiting cavity 230 along the cable outlet direction can be designed not only to accommodate the ends of the two sets of baffles 312 located outside the cable reel 300, but also to further accommodate the two sets of baffles 312 located in part of the surface of the cable reel 300, i.e., the first reel 31. The design can be made according to actual needs.

[0143] To ensure that the dimensions of the limiting cavity 230 along the cable exit direction meet design requirements, the baffle 312 can be designed to include a first plate segment and a second plate segment. One end of the first plate segment is connected to the inner wall of the upper cover 200, and the other end of the first plate segment extends along the cable exit direction and connects to one end of the second plate segment. The second plate segment extends in a direction perpendicular to the cable exit direction. Therefore, the spacing between the first plate segments of the two sets of baffles 312 determines the dimensions of the limiting cavity 230 along the direction perpendicular to the cable exit direction, and the spacing between the second plate segments of the two sets of baffles 312 determines the dimensions of the limiting cavity 230 along the cable exit direction.

[0144] In some examples, such as the attached Figure 9 and attached Figure 10As shown, the inner wall of the upper cover 200 (i.e., the inner wall of the upper cover side panel 202) has guide posts 24, which are used to guide the centered assembly of the upper cover 200 relative to the bottom shell 100. Further, for example, two oppositely arranged inner walls of the upper cover 200 are each provided with guide posts 24.

[0145] The end of the guide post 24 that is away from the inner wall of the upper cover 200, and / or the end of the guide post 24 that is away from the top plate 201 of the upper cover 200, can be used to position and cooperate with the bottom shell 100. According to actual needs, the corresponding positioning structure can be designed on the bottom shell 100.

[0146] For example, Figure 7 For example, the bottom shell 100 is provided with an annular inner wall 103. When assembling the top cover 200, the end of the guide post 24 facing away from the side wall 202 of the top cover can abut against the inner side wall of the inner wall 103 of the bottom shell, thereby guiding the top cover 200 to be centrally assembled relative to the bottom shell 100 based on the guide post 24, thus meeting the positioning requirements.

[0147] Of course, a positioning groove (not shown in the figure) can also be provided on the bottom plate 101 of the bottom shell 100. When assembling the top cover 200, the end of the guide post 24 that is away from the top plate 201 of the top cover 200 is embedded in the positioning groove, which can also achieve the requirement of centering assembly.

[0148] To improve guiding and positioning effects, at least two sets of guide columns 24 can be configured, with the at least two sets of guide columns 24 arranged at intervals and opposite to each other in a direction parallel to the top plate 201. Each set of guide columns 24 can consist of one column or multiple columns arranged at intervals. Figure 9 For example, a set of guide posts 24 are provided on two oppositely arranged inner sidewalls of a square-shaped top cover 200, and each set of guide posts 24 consists of two spaced-apart posts.

[0149] As mentioned above, the inner wall of the upper cover 200 is also provided with a second snap-fit ​​structure 22, which can be disposed in different areas of the inner wall of the upper cover 200 with the guide post 24, for example, Figure 9 The example shows that the second snap-fit ​​structure 22 and the guide post 24 are respectively arranged on two adjacent inner sidewalls of the upper cover 200. This can avoid the second snap-fit ​​structure 22 and the guide post 24 being concentrated in the same area, which may cause mutual interference. At the same time, it also helps to make the internal stress distribution of the upper cover 200 more uniform.

[0150] For any of the aforementioned fiber optic access boxes A, as shown in the attached document... Figure 13 and attached Figure 14As shown, the side of the cable reel 300 facing the upper cover 200 has a first limiting structure 313, which is used to limit the first connector 41.

[0151] The fiber optic access box has a storage state and an outgoing cable state. See also Figure 14 When the fiber optic access box is in storage state, the first limiting structure 313 is used to store and fix the first connector 41 inside the fiber optic access box.

[0152] When the fiber optic access box outputs cable, during the process of the user pulling the fiber optic cable 400 outward, the first connector 41 needs to be fixed to the cable reel 300 by the first limiting structure 313 and rotate synchronously with the cable reel 300. The limiting structure 313's restriction on the first connector 41 means that during the rotation of the cable reel 300, the first connector 41 will not be thrown out. This can be either the first connector 41 remaining completely stationary, or the first connector 41 being able to move but not being thrown out. See also Figure 13 When the fiber optic access box is in the cable-out state, the first connector 41 is disengaged from the first limiting structure 313 and is led out to a specific position outside the fiber optic access box to facilitate connection with external devices.

[0153] See further Figure 12 As an example, the first limiting structure 313 is composed of multiple spaced-apart limiting plates, which form a limiting cavity adapted to the shape of the first connector 41. For example, the main body of the first connector 41 is limited by the spaced-apart main body limiting plate 3131, and the tail portion of the first connector 41 is limited by the spaced-apart tail limiting plate 3132. In this way, not only can the first connector 41 be limited, but it is also convenient for the first connector 41 to be quickly disassembled from it.

[0154] For any of the aforementioned fiber optic access boxes A, as shown in the attached document... Figure 14 As shown, at least one of the upper cover 200 and the bottom shell 100 has a second limiting structure 13 on its exterior, which is used to fix the second connector 42. The second limiting structure 13 can be connected to the upper cover 200, the bottom shell 100, or both.

[0155] See Figure 14 When the fiber optic access box is in storage mode, the second limiting structure 13 is used to store and fix the second connector 42 outside the fiber optic access box. In storage mode, the fiber optic access box only needs to accommodate one connector, making it more compact.

[0156] See Figure 13When the fiber optic access box is in the cable-out state, the second connector 42 disengages from the second limiting structure 13 and extends to a specific external position of the fiber optic access box to facilitate connection with external devices.

[0157] The second limiting structure 13 can be, for example, tape, binding strap, etc., which has the advantages of simple structure, high flexibility and convenient operation.

[0158] In some examples, the fiber optic access box A provided in this application embodiment includes both a first limiting structure 313 and a second limiting structure 13. Thus, when the fiber optic access box is in a storage state, the first limiting structure 313 is used to store and fix the first connector 41 inside the fiber optic access box, and the second limiting structure 13 is used to store and fix the second connector 42 outside the fiber optic access box (see...). Figure 14 ).

[0159] See Figure 13 When the fiber optic access box is in the cable-out state, the second limiting structure 13 allows the second connector 42 to be released. The user pulls the optical cable 400 outward from the second connector 42, and the cable reel 300 rotates and releases the optical cable 400. At the same time, the cable reel 300 drives the first connector 41 fixed on the cable reel 300 to rotate synchronously until the length of the optical cable mating with the second connector 42 is adjusted. At this time, the optical cable 400 needs to be pulled out by more than the required length to compensate for the pulling of the first connector 41.

[0160] Subsequently, the first limiting structure 313 allows the first connector 41 to be released and led out to the outside of the fiber optic access box. The user pulls the optical cable 400 outward from the first connector 41 until the length of the optical cable mating with the first connector 41 is adjusted.

[0161] It should be noted that for the aforementioned fiber optic access box A, when the cable is being routed out, the user needs to open the top cover 200. After the cable is routed out, the user then closes the top cover 200 back onto the bottom shell 100.

[0162] The above embodiments of this application provide an exemplary description of a fiber optic access box A that does not have an adapter 43 and is suitable for multi-directional cable output. In addition to the above advantages, fiber optic access box A has the following advantages compared to fiber optic access boxes with an adapter 43: (1) It avoids the use of the adapter 43, reducing costs. (2) Eliminating the adapter 43 in the fiber optic access box allows for a smaller thickness of the fiber optic access box, which is beneficial for the lightweight design of the fiber optic access box (taking a square outline as an example, its size can be reduced to 80*80*20mm). (3) In related technologies, the adapter 43 is usually set on the side of the cable reel 300 facing the top cover 200. After the adapter 43 is eliminated, the cable reel 300 is allowed to accommodate more optical cable in the space on this side, that is, the fiber reel size is larger, so that the first connector 41 can be led out to a more distant position outside the fiber optic access box, meeting the usage requirements of various scenarios, such as indoor scenarios.

[0163] Secondly, this application describes a scheme for a fiber optic access box (hereinafter referred to as fiber optic access box B) that is equipped with an adapter 43 and is suitable for multi-directional cable output.

[0164] Figures 18-27 The structural layout of fiber optic access box B is illustrated in the example. Specifically, Figure 18 The diagram shows the external shape of the fiber optic access box B. Figure 19 An exploded view of the fiber optic access box B is shown.

[0165] As attached Figure 18 and attached Figure 19 As shown, the fiber optic access box includes a bottom shell 100, a top cover 200, a cable reel 300, and an optical cable 400. The top cover 200 covers the bottom shell 100, and the cable reel 300 is rotatably located within the cavity formed by the top cover 200 and the bottom shell 100. The cable reel 300 is connected to the top cover 200 for synchronous rotation of the cable reel 300 and the top cover 200 relative to the bottom shell 100.

[0166] The optical cable 400 has a first connector 41 and a second connector 42 at both ends. The optical cable 400 is coiled on a cable reel 300. An adapter 43 is located on the side of the cable reel 300 facing the upper cover 200, and the adapter 43 is connected to the first connector 41. The side of the upper cover 200 facing the bottom shell 100 has an opening 26 for exposing the optical interface 430 of the adapter 43. The side of the bottom shell 100 away from the upper cover 200 has a second cable outlet 11 for leading out the cable segment of the optical cable 400 connected to the second connector 42.

[0167] For example, the first connector 41 and the second connector 42 can each be an LC connector or an SC connector independently. Accordingly, the adapter 43 can be an LC adapter or an SC adapter, with one of the adapter 43 and the second connector 42 used for external connection to a fiber distribution box or other optical access device, and the other used for internal connection to indoor optical network equipment.

[0168] By pulling out the optical cable 400, the user only needs to deliver the second connector 42 to the corresponding connection position; the position of the adapter 43 remains inconvenient. During the pulling process of the optical cable 400, the cable reel 300 can rotate and release the optical cable 400. When pulling the optical cable 400 stops, the excess length of the optical cable 400 can be wound onto the cable reel 300, achieving storage of excess optical cable 400 and improving the aesthetics and reliability of the optical cable wiring.

[0169] As mentioned above, the cable reel 300 and the top cover 200 can rotate synchronously relative to the bottom shell 100. When the two rotate, the position of the opening 26 on the top cover 200 also changes, ultimately achieving the purpose of adjusting the cable outlet orientation of the fiber optic access box.

[0170] The fiber optic access box provided in this embodiment has an opening 26 on the side of the upper cover 200 facing the bottom shell 100. The opening 26 exposes the optical interface 430 of the adapter 43, ensuring that the optical interface 430 of the adapter 43 is led out and exposed. Compared to related technologies where the upper cover 200 and the bottom shell 100 together form a combined opening, this embodiment sets the opening 26 separately on the upper cover 200, no longer limited by the installation position of the bottom shell 100. After the bottom shell 100 is installed and fixed, the cable reel 300 and the upper cover 200 can rotate synchronously relative to the bottom shell 100, allowing the upper cover 200 to be installed in multiple directions relative to the bottom shell 100. Correspondingly, the position of the opening 26 on the upper cover 200 also changes according to the installation orientation of the upper cover 200. This enables multi-directional cable output from the fiber optic access box, ensuring that the cable output position corresponds to the fiber input position in the specific application scenario. This simplifies the assembly operation of the fiber optic access box.

[0171] In addition, by providing a second cable outlet 11 on the side of the bottom shell 100 opposite to the top cover 200 for leading out the cable segment of the optical cable 400 connected to the second connector 42, the optical fiber access box can simultaneously have the layered cable output function of upper layer optical output interface and lower layer cable output.

[0172] In some examples, the cable reel 300 has a locked state and an unlocked state. In the locked state, the cable reel 300 is locked to the bottom shell 100. In the unlocked state, the cable reel 300 and the top cover 200 can rotate synchronously relative to the bottom shell 100.

[0173] In this design, the cable reel 300 and the upper cover 200 are fixedly connected, forming a combined structure. When the fiber optic access box is locked, the cable reel 300 is locked to the bottom shell 100, and the cable reel 300 cannot move relative to the bottom shell 100 (this can include movement along its axial direction and movement along its circumferential direction). Correspondingly, the upper cover 200 is also locked relative to the bottom shell 100. When the fiber optic access box is unlocked, the cable reel 300 can rotate relative to the bottom shell 100, that is, the upper cover 200 can also rotate relative to the bottom shell 100, thereby adjusting the installation orientation of the upper cover 200 relative to the bottom shell 100. Therefore, this design allows for adjustment of the installation orientation of the upper cover 200 without opening it.

[0174] The structure of the cable tray 300 in this type of fiber optic access box B is described below. Its structure can be found in the appendix. Figure 25 The cable reel 300 includes a first reel 31, a second reel 32, and a cable drum 33. The first reel 31 and the second reel 32 are spaced apart along the axial direction of the cable drum 33. The cable drum 33 is rotatably connected to the bottom shell 100, and the second reel 32 is close to the bottom shell 100. An optical cable 400 passes through the first reel 31. A portion of the optical cable 400 is wound around the portion of the cable drum 33 located between the first reel 31 and the second reel 32 and connects to a second connector 42. Another portion of the optical cable 400 is wound around the cable reel structure 314 and connects to a first connector 41.

[0175] For fiber optic access box B, it also has a storage state and a cable output state. Regardless of its state, its first connector 41 and adapter 43 are always fixed to the cable reel 300. Based on this, as shown in the attached... Figure 24 As shown, the cable reel 300 has a third limiting structure 318 and a connector limiting structure (not marked in the figure) on the side facing the upper cover 200. The connector limiting structure is used to limit the first connector 41, and the third limiting structure 318 is used to limit the adapter 43.

[0176] The structural arrangement principle of the third limiting structure 318 can be found in the structural arrangement principle of the relevant limiting structures of the fiber optic access box A mentioned above, and will not be repeated here.

[0177] To facilitate multi-directional cable output from the fiber optic access box, as shown in the attached document... Figure 20 -Appendix Figure 22 As shown, the bottom shell 100 includes a bottom plate 101 and a fixed shaft 102 connected to the bottom plate 101. The cable reel 300 includes a cable cylinder 33, which is rotatably sleeved on the fixed shaft 102, and the cable reel 300 is fixedly connected to the top cover 200. The cable reel 300 has a locked state and an unlocked state. In the locked state, the cable reel 300 is locked to the bottom shell 100. In the unlocked state, the cable reel 300 is rotatable relative to the bottom shell 100.

[0178] The cable reel 300 and the top cover 200 can be fixedly connected by a snap-fit ​​connection, for example, see [reference needed]. Figure 24 The example shows cable reel 300, specifically its first reel 31 which has a snap-fit ​​groove 317, see [link / reference]. Figure 22 and Figure 27 The example illustrates that the upper cover 200 has a second latch 25 inside, which is adapted to engage with the latch groove 317 to achieve a fixed connection between the cable reel 300 and the upper cover 200. Furthermore, along the circumferential direction, both the latch groove 317 and the second latch 25 can be configured as multiple latches distributed at intervals.

[0179] Figure 27 It is also shown that the upper cover 200 includes an upper cover side wall 202 and an upper cover inner wall 203. The upper cover inner wall 203 is located inside the upper cover side wall 202 and is also used to fit over the outside of the cable reel 300, serving as an assembly guide and positioning element. Figure 27 As an example, the second buckle 25 is set on the inner side wall of the inner enclosure 203 of the upper cover.

[0180] For the locking scheme between the cable reel 300 and the fixed shaft 102, please refer to the following.

[0181] As attached Figure 20 Appendix Figure 22 and attached Figure 25 As shown, the inner wall of the cable reel 33 has a first rib 331, the fixed shaft 102 is elastically deformable in the radial direction, and the outer wall of the fixed shaft 102 has a second rib 1021. The second rib 1021 is used to stop the first rib 331 to limit the cable reel 300 in the axial direction of the cable reel 300 in the locked state.

[0182] The second rib 1021 on the outer side wall of the fixed shaft 102 can stop the first rib 331 on the inner side wall of the cable reel 33, thereby achieving axial locking of the cable reel 300. When it is necessary to release the axial locking of the cable reel 300, the upper cover 200 (which is fixed to the cable reel 300, so that the cable reel 300 is pulled up synchronously) can be pulled up. Since the fixed shaft 102 can be elastically deformed in the radial direction, the second rib 1021 is compressed by the first rib 331, thereby releasing the stop between the first rib 331 and the second rib 1021.

[0183] The fixed shaft 102 can be elastically deformable in the radial direction in various ways, for example, by elastically arranging its structure or by elastically arranging its material. For example, one embodiment can be found... Figure 20The fixed shaft 102 is cylindrical, and multiple slots are provided on the side wall of the fixed shaft 102 opposite to the base plate 101. The multiple slots are arranged at intervals along the circumferential direction of the fixed shaft 102, and each slot extends along the axial direction of the fixed shaft 102 with one end extending to the free end of the fixed shaft 102. Thus, based on the slots, deformation space is provided for the radial elastic deformation of the fixed shaft 102.

[0184] The first protruding rib 331, located on the inner wall of the cable reel 33, can be an integral annular protruding rib (see...). Figure 25 It can also be multiple dispersed ribs spaced apart along the circumferential direction, all of which can achieve the stopping effect.

[0185] Similarly, the second rib 1021 provided on the outer wall of the fixed shaft 102 can be an integral annular rib, or it can be a plurality of dispersed ribs spaced apart along the circumferential direction (see...). Figure 20 All of the above can achieve the blocking effect.

[0186] As attached Figure 20 Appendix Figure 23 and attached Figure 26 As shown, the side of the cable reel 300 facing the base plate 101 (i.e., the surface of the second reel 32) has a first stop block 321, and the base plate 101 has a second stop block 1011, further as... Figure 21 As shown, the second stop block 1011 stops the first stop block 321 to limit the cable reel 300 in the circumferential direction of the cable reel 300 in the locked state.

[0187] The first stop block 321 on the cable reel 300 and the second stop block 1011 on the base plate 101 act as a stop, thereby achieving circumferential locking of the cable reel 300. When it is necessary to release the circumferential locking of the cable reel 300, the first rib 331 and the second rib 1021 can be released by pulling up the top cover 200, and the cable reel 300 is lifted simultaneously, thereby releasing the stop between the first stop block 321 on the cable reel 300 and the second stop block 1011 on the base plate 101.

[0188] To improve the circumferential stopping effect on the cable reel 300, multiple first stop blocks 321 can be provided on the side of the cable reel 300 facing the base plate 101, with the multiple first stop blocks 321 spaced apart in the circumferential direction. Correspondingly, multiple second stop blocks 1011 can be provided on the base plate 101, with the multiple second stop blocks 1011 spaced apart in the circumferential direction. In this way, in the circumferentially locked state, each first stop block 321 is located between two adjacent second stop blocks 1011.

[0189] Further details are attached. Figure 20As shown, the inner wall of the cable reel 33 has a first rib 331, the fixed shaft 102 is elastically deformable in the radial direction, and the outer wall of the fixed shaft 102 has a third rib 1022; the third rib 1022 is used to stop the first rib 331 so as to limit the cable reel 300 in the axial direction of the cable reel 300 in the unlocked state.

[0190] The stopping principle of the third rib 1022 and the first rib 331 can be found in the stopping principle of the second rib 1021 and the first rib 331. The difference is that the third rib 1022 performs the above-mentioned stopping in the unlocked state of the cable reel 300. This setting can prevent the combined structure formed by the cable reel 300 and the upper cover 200 from separating from the bottom shell 100 when the cable reel 300 is in the unlocked state.

[0191] In the embodiments of this application, the third rib 1022 and the second rib 1021 are distributed at intervals along the axial direction of the fixed shaft 102, and the third rib 1022 is further away from the bottom plate 101 than the second rib 1021.

[0192] The third rib 1022, which is set on the outer wall of the fixed shaft 102, can be an integral annular rib or multiple dispersed ribs spaced apart along the circumferential direction. Both can achieve the stopping effect.

[0193] In some examples, as shown in the appendix Figure 25 As shown, the first protruding rib 331, located on the inner wall of the cable reel 33, is an integral circular protruding rib. (See attached image.) Figure 20 As shown, both the third rib 1022 and the second rib 1021 can be multiple dispersed ribs spaced apart along the circumferential direction. The projections of the multiple dispersed ribs of the third rib 1022 onto the base plate 101 do not coincide with the projections of the multiple dispersed ribs of the second rib 1021 onto the base plate 101. That is, the two are staggered in the circumferential direction, which is beneficial to the balanced distribution of stress on the fixed shaft 102 and to improving the fatigue life of the fixed shaft 102.

[0194] The following combination Figure 22 and Figure 23 The operation process of the aforementioned fiber optic access box B is further described.

[0195] See Figure 22The example illustrates a cable reel 300 in the fiber optic access box B in a locked state. In this state, the second rib 1021 on the lower layer of the outer wall of the fixed shaft 102 intersects with the first rib 331 on the inner wall of the cable reel 33, thus axially locking the cable reel 300. Furthermore, the first stop block 321 on the cable reel 300 intersects with the second stop block 1011 on the base plate 101, thereby circumferentially locking the cable reel 300. Ultimately, this prevents the cable reel 300 from moving in either the axial or circumferential directions.

[0196] When it is necessary to release the locked state of cable reel 300, please refer to Figure 23 When the top cover 200 and cable reel 300 are lifted, the first stop block 321 on the cable reel 300 releases its stop from the second stop block 1011 on the base plate 101. Simultaneously, the first stop block 321 on the cable reel 300 disengages from the second stop block 1011 on the base plate 101, and both are released from their stop positions. In summary, the fiber optic access box B, based on a two-stage stop structure, achieves the locking and unlocking of the cable reel 300.

[0197] At this point, the position of the opening 2 on the top cover 200 can be adjusted by rotating the top cover 200 to adjust the direction of the cable outlet. Figure 23 As an example, when the fiber optic access box is designed with a square outline, the four-way cable output function of the fiber optic access box can be realized by simultaneously rotating the cable reel 300 and the top cover 200.

[0198] Considering that the adapter 43 is disposed inside the fiber optic access box B in this embodiment, this results in an increase in the thickness of the fiber optic access box. To address this technical problem, see the attached... Figure 19 As shown, the fiber optic access box B also includes a cable coil structure 314, which is located on the surface of the cable reel 300 facing the upper cover 200 and is located on the rotating shaft side of the cable reel 300. The cable coil structure 314 is used for winding the optical cable 400.

[0199] In this embodiment, a cable coiling structure 314 is provided on the side of the rotating shaft (i.e., the cable coil 33) of the cable reel 300. In this way, the cable segment of the optical cable 400 located on the upper layer of the cable reel 300 is coiled around the cable coiling structure 314 instead of the cable coil 33, which effectively utilizes the lateral idle space of the cable reel 300 and avoids occupying a large longitudinal space. This helps to reduce the thickness of the optical fiber access box to a certain extent.

[0200] The cable coil structure 314 can be designed in any shape that allows the optical cable 400 to be coiled, such as a cylindrical or elliptical cylindrical shape (see [reference]). Figure 24 (or other geometric shapes).

[0201] The above provides illustrative examples of fiber optic access box A and fiber optic access box B. For some examples of these two types of fiber optic access boxes, please refer to... Figures 15-17 The fiber optic access box also includes a mounting backplate 500, which has a first mounting structure 51; the bottom shell 100 has a second mounting structure 14 on the side opposite to the top cover 200, and the second mounting structure 14 is detachably connected to the first mounting structure 51.

[0202] The portion of the fiber optic access box excluding the mounting backplate 500 is referred to as the fiber optic access box assembly. By pre-installing the mounting backplate 500 onto the wall, the assembled fiber optic access box assembly is then installed onto the mounting backplate 500, thus completing the installation of the fiber optic access box. This setup offers at least the following advantages: easier maintenance and repair, and improved assembly efficiency.

[0203] The mounting backplate 500 can be installed on the wall in various ways, such as by adhesive bonding.

[0204] The second mounting structure 14 and the first mounting structure 51 can adopt any type of structure suitable for detachable connection, such as snap-fit, adhesive, screw connection, etc. In some examples, as shown in the attached... Figure 16 and attached Figure 17 As shown, the first mounting structure 51 is a hook, and the second mounting structure 14 is a hanging groove.

[0205] This detachable hook-and-slot connection solution, while ensuring connection reliability, further enhances ease of operation, enables quick installation and disassembly, and reduces labor and time costs.

[0206] Examples of this application Figure 17 The example shows four hooks, arranged in pairs on opposite sides of the mounting backplate 500.

[0207] Further, see Figure 17 The free end of the hook has an inclined guide surface 511 on the side near the hanging groove. The guide surface 511 is used to guide the bottom shell 100 from the initial installation position on the mounting back plate 500 to the final installation position.

[0208] The guide surface 511 provides a clear guiding direction for the installation of the base shell 100, facilitating a quick connection between the base shell 100 and the mounting back plate 500. Even in low light or limited operating space, installers can reduce installation difficulty and improve efficiency by relying on the guidance of the guide surface 511. Moreover, the guide surface 511 can precisely guide the movement of the base shell 100, ensuring that the base shell 100 accurately reaches the installation endpoint, thereby enabling precise engagement between the hook and the mounting slot.

[0209] For any of the fiber optic access boxes mentioned above, please refer to [link / reference]. Figure 17The surface of the mounting backplate 500 facing the bottom shell 100 has an indicator mark 52, which is used to indicate the initial mounting position of the bottom shell 100 on the mounting backplate 500.

[0210] Indicator marker 52 can provide clear visual guidance for installers, enabling them to quickly and accurately place the base shell 100 in the correct initial position on the mounting back plate 500, reducing the time spent searching for and adjusting the position during installation, improving installation efficiency, reducing installation difficulty, and ensuring installation accuracy.

[0211] For example, the indicator mark 52 can be a basic geometric shape mark, such as a line, rectangle, or square box, which has the advantages of being easy to prepare and easy to identify. Of course, the indicator mark 52 can also be a text mark, a symbol mark, a color mark, etc.

[0212] Figure 17 The example shows that the indicator mark 52 is a rectangular frame. When applied, the lower edge of the base shell 100 can be aligned with the upper edge of the indicator mark 52 to quickly determine the initial installation position of the base shell 100 on the mounting back plate 500. Then, the hook is inserted into the hanging groove, and the base shell 100 is guided from the initial installation position on the mounting back plate 500 to the final installation position based on the guide surface 511, so as to achieve efficient installation of the base shell 100.

[0213] The above description is only for the purpose of enabling those skilled in the art to understand the technical solutions disclosed herein, and is not intended to limit the scope of this disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the protection scope of this disclosure.

Claims

1. A fiber optic access box, characterized in that, The fiber optic access box includes: a bottom shell (100), a top cover (200), a cable reel (300), and an optical cable (400); The upper cover (200) is detachably connected to the bottom shell (100), and the upper cover (200) is configured to be connected to the bottom shell (100) by rotation in different connection positions; The cable reel (300) is rotatably located within the receiving cavity formed by the upper cover (200) and the bottom shell (100); The optical cable (400) has a first connector (41) and a second connector (42) at both ends, and the optical cable (400) is coiled around the cable reel (300); The top cover (200) has a first cable outlet (21) on the side facing the bottom shell (100), and the cable reel (300) has a third cable outlet (311) on the side facing the top cover (200). The third cable outlet (311) is used to connect with the first cable outlet (21) to facilitate the cable segment of the optical cable (400) connected to the first connector (41). The bottom shell (100) has a second cable outlet (11) on the side opposite to the top cover (200) for leading out the cable segment of the optical cable (400) connected to the second connector (42).

2. The fiber optic access box according to claim 1, characterized in that, The inner wall of the bottom shell (100) has a first snap-fit ​​structure (12), and the inner wall of the top cover (200) has a second snap-fit ​​structure (22). The first snap-fit ​​structure (12) and the second snap-fit ​​structure (22) are adapted to snap-fit ​​together.

3. The fiber optic access box according to claim 2, characterized in that, At least one of the first snap-fit ​​structure (12) and the second snap-fit ​​structure (22) is configured as multiple sets arranged at intervals along the rotation direction of the upper cover (200).

4. The fiber optic access box according to claim 2, characterized in that, The number of one of the first snap-fit ​​structure (12) and the second snap-fit ​​structure (22) is greater than the number of the other.

5. The fiber optic access box according to claim 4, characterized in that, The outer contours of the bottom shell (100) and the top cover (200) are both square. The first snap-fit ​​structure (12) is provided on the four inner sidewalls of the bottom shell (100), and the second snap-fit ​​structure (22) is provided on two of the inner sidewalls of the top cover (200) that are arranged opposite to each other.

6. The fiber optic access box according to claim 1, characterized in that, The surface of the cable reel (300) facing the upper cover (200) has two sets of protruding baffles (312) arranged at intervals, one end of the baffles (312) extending to the outside of the cable reel (300); The third cable outlet (311) is formed between the two sets of baffles (312).

7. The fiber optic access box according to claim 6, characterized in that, Along the radially outward direction of the cable reel (300), the spacing between the two sets of baffles (312) changes from large to small.

8. The fiber optic access box according to claim 7, characterized in that, Along the radially outward direction of the cable reel (300), the baffle (312) comprises a first segment (3121) and a second segment (3122) distributed sequentially. The spacing between the first segments (3121) of the two sets of baffles (312) gradually decreases in the radial outward direction; The second segments (3122) of the two sets of baffles (312) are arranged at equal intervals, and the distance between the second segments (3122) of the two sets of baffles (312) is less than or equal to the minimum distance between the first segments (3121) of the two sets of baffles (312).

9. The fiber optic access box according to claim 6, characterized in that, The inner wall of the baffle (312) has protrusions (3123), and the protrusions (3123) of the two sets of baffles (312) are arranged opposite to each other to clamp the optical cable (400).

10. The fiber optic access box according to claim 6, characterized in that, The inner wall of the upper cover (200) has two sets of limiting blocks (23) arranged at intervals, and a limiting cavity (230) is formed between the two sets of limiting blocks (23); The ends of the two sets of baffles (312) located outside the cable reel (300) are confined within the limiting cavity (230).

11. The fiber optic access box according to claim 1, characterized in that, The inner wall of the upper cover (200) has guide posts (24) for guiding the upper cover (200) to be centrally assembled relative to the bottom shell (100).

12. The fiber optic access box according to claim 1, characterized in that, The cable reel (300) has a first limiting structure (313) on the side facing the top cover (200), the first limiting structure (313) being used to limit the first connector (41).

13. The fiber optic access box according to claim 1, characterized in that, At least one of the top cover (200) and the bottom shell (100) has a second limiting structure (13) on its exterior, the second limiting structure (13) being used to fix the second connector (42).

14. A fiber optic access box, characterized in that, The fiber optic access box includes: a bottom shell (100), a top cover (200), a cable reel (300), and an optical cable (400); The upper cover (200) covers the bottom shell (100), and the cable reel (300) is rotatably located within the receiving cavity formed by the upper cover (200) and the bottom shell (100); the cable reel (300) can be connected to the upper cover (200) for synchronous rotation of the cable reel (300) and the upper cover (200) relative to the bottom shell (100); The optical cable (400) has a first connector (41) and a second connector (42) at both ends. The optical cable (400) is coiled around the cable reel (300). The side of the cable reel (300) facing the upper cover (200) has an adapter (43), which is connected to the first connector (41). The top cover (200) has an opening (2) on the side facing the bottom shell (100) for exposing the optical interface (430) of the adapter (43); The bottom shell (100) has a second cable outlet (11) on the side opposite to the top cover (200) for leading out the cable segment of the optical cable (400) connected to the second connector (42).

15. The fiber optic access box according to claim 14, characterized in that, The cable reel (300) has a locked state and an unlocked state. In the locked state, the cable reel (300) is locked to the bottom shell (100). In the unlocked state, the cable reel (300) and the top cover (200) can rotate synchronously relative to the bottom shell (100).

16. The fiber optic access box according to claim 15, characterized in that, The bottom shell (100) includes a bottom plate (101) and a fixed shaft (102) connected to the bottom plate (101). The cable reel (300) includes a cable cylinder (33) which is rotatably sleeved on the fixed shaft (102). The inner wall of the cable drum (33) has a first rib (331), the fixed shaft (102) can be elastically deformed in the radial direction, and the outer wall of the fixed shaft (102) has a second rib (1021). The second rib (1021) is used to stop the first rib (331) to limit the cable reel (300) in the axial direction of the cable reel (300) in the locked state.

17. The fiber optic access box according to claim 16, characterized in that, The cable reel (300) has a first stop block (321) on the side facing the base plate (101), and the base plate (101) has a second stop block (1011). The second stop block (1011) stops the first stop block (321) to limit the cable reel (300) in the circumferential direction of the cable reel (300) in the locked state.

18. The fiber optic access box according to claim 16, characterized in that, The cable reel (300) includes a cable cylinder (33), which is rotatably sleeved on the fixed shaft (102). The inner sidewall of the cable cylinder (33) has a first rib (331), the fixed shaft (102) is elastically deformable in the radial direction, and the outer sidewall of the fixed shaft (102) has a third rib (1022). The third rib (1022) is used to stop the first rib (331) to limit the cable reel (300) in the axial direction of the cable reel (300) in the unlocked state.

19. The fiber optic access box according to claim 14, characterized in that, The fiber optic access box further includes a cable coil structure (314), which is located on the surface of the cable reel (300) facing the upper cover (200) and is located on the pivot side of the cable reel (300). The cable coil structure (314) is used for winding the optical cable (400).

20. The fiber optic access box according to any one of claims 1-19, characterized in that, The fiber optic access box also includes a mounting backplate (500), which has a first mounting structure (1); The bottom shell (100) has a second mounting structure (14) on the side opposite to the top cover (200), and the second mounting structure (14) is detachably connected to the first mounting structure (1).

21. The fiber optic access box according to claim 20, characterized in that, The first mounting structure (1) is a hook, and the second mounting structure (14) is a hanging groove.

22. The fiber optic access box according to claim 21, characterized in that, The free end of the hook has an inclined guide surface (511) on the side near the hanging groove, the guide surface (511) being used to guide the bottom shell (100) from the initial installation position on the mounting back plate (500) to the final installation position.

23. The fiber optic access box according to claim 20, characterized in that, The surface of the mounting backplate (500) facing the bottom shell (100) has an indicator mark (52) for indicating the initial mounting position of the bottom shell (100) on the mounting backplate (500).

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