A separating box

Abstract

The utility model discloses a kind of fiber distribution boxes, belong to optical cable application technical field, including upper cover and bottom plate, by the cable-through pipe is set in the side of upper cover, cooperate the setting of optical cable fixing mechanism, so that the introduction of optical cable, end fixed and fiber distribution etc. Operation process is carried out on upper cover, satisfy the use performance of fiber distribution box while, simplify the assembly process of fiber distribution box. Fiber distribution box in the utility model, can effectively avoid the setting defect of optical cable from bottom plate guiding to the setting under the conventional practice of upper cover, avoid the bending damage and compression loss caused by the overlength of light unit, simplify the connection fixed process of optical cable on fiber distribution box, so that the connection between bottom plate and upper cover can be detachable connection, also can be hot plate welding connection of undetachable, and the sealing mode of optical cable introduction part can select mechanical seal, also can select heat shrinkage seal, the selection flexibility of connection mode and sealing mode is higher, the use range of fiber distribution box is wider, more strong adaptability, with excellent application prospect.

Description

Technical Field

[0001] This utility model belongs to the field of optical cable application technology, specifically relating to a fiber distribution box. Background Technology

[0002] In the field of optical communication application technology, fiber distribution boxes are an important communication node device. Their main functions include fixing, branching, splicing, and wiring of optical cables, playing an important role in the laying and application of optical cables.

[0003] During the use of fiber distribution boxes, there are usually high requirements for the sealing and tensile strength of the access optical cables. Generally, there are two common methods to achieve optical cable sealing: heat shrink sealing and mechanical sealing. Although these methods can meet the end sealing requirements of optical cables to a certain extent, they also have obvious limitations. In particular, the tensile strength of the optical cable end is limited after the optical cable is sealed, which poses a risk of accidental pull-out.

[0004] Furthermore, in most existing fiber distribution boxes, pre-connected adapters are assembled on the top cover, and optical cables are fixed on the base. This assembly method is cumbersome, requiring the optical cable to be fixed on the base before being guided into the top cover. It also requires reserving a long optical fiber for connection with the adapter, resulting in a relatively messy internal environment of the fiber distribution box. This increases the time spent organizing the optical cables, affects the installation efficiency of the fiber distribution box, and there is also a risk that the optical cable may be trapped between the top cover and the base, leading to damage and increasing the material cost of replacing the optical cable. Utility Model Content

[0005] In response to one or more of the above-mentioned defects or improvement needs of the existing technology, this utility model provides a fiber distribution box that can reliably realize the introduction and end fixing of optical cables in the fiber distribution box, simplify the assembly and connection process of optical fibers and adapters, and ensure the installation efficiency and reliability of the fiber distribution box.

[0006] To achieve the above objectives, this utility model provides a fiber distribution box, including a top cover and a bottom plate. The top cover has an inner cavity with an opening on one side, and a plurality of mounting holes for installing adapters are provided in the inner cavity. The bottom plate is detachably connected to the opening side of the top cover to close the opening side. One side of the upper cover is provided with a cable-passing tube connecting the inside and outside of the upper cover, used to introduce the optical cable to be split into the inner cavity; and The fiber distribution box also includes an optical cable fixing mechanism corresponding to the cable insertion tube, used to fix the end of the optical cable introduced into the fiber distribution box; the optical cable fixing mechanism can be installed in the inner cavity of the upper cover on the outlet side of the cable insertion tube, or the optical cable fixing mechanism can be connected and locked in the cable insertion tube.

[0007] As a further improvement of this utility model, the optical cable fixing mechanism is a first optical cable fixing mechanism; the first optical cable fixing mechanism can be installed in the inner cavity of the upper cover on the side of the cable tube outlet, and includes a fixing base, a fixing pressure block and a locking bushing. One end of the fixed base is a crimping end, and the other end is a fixed end for fixing the locking bushing; the top surface of the crimping end is provided with a first crimping groove along a first direction, and the top surface of the fixed end is provided with a bushing insert groove, the bushing insert groove being located on one side of the first crimping groove along the first direction. The fixing block is detachably connected to the crimping end and is used to press the end of the optical cable into the first crimping groove. The locking bushing includes a locking part and an adhesive part arranged coaxially. The locking part can achieve limiting locking in a first direction after being embedded in the bushing insertion groove. The locking part has an optical cable sheath groove, so that the end of the optical cable held by the fixing block can be embedded and fixed in the optical cable sheath groove. The adhesive part has a through hole for optical unit and a reinforcing core groove. The through hole for optical unit to pass through in the optical cable, and the reinforcing core groove for accommodating the reinforcing core of the optical cable and achieving adhesive fixation of the reinforcing core.

[0008] As a further improvement of this utility model, a second pressing groove is provided on one end face of the fixed pressing block; the second pressing groove can be directly opposite the first pressing groove after the fixed pressing block is connected to the pressing end, and can be combined with the first pressing groove to form a pressing hole with both ends through. or A second pressing groove is provided on one end face of the fixed pressing block, and a plurality of friction protrusions are provided on the inner wall surface of the first pressing groove and / or the second pressing groove.

[0009] As a further improvement of this utility model, a first mounting position is provided in the inner cavity of the upper cover, and a mounting hole is provided on the fixed base, so that the fixed base can be installed in the first mounting position through a number of connectors passing through the mounting hole; and / or The bottom of the fixed base is provided with an installation positioning groove, and a positioning block is provided in the inner cavity of the upper cover; by matching the installation positioning groove and the positioning block, the fixed base can be quickly positioned in the inner cavity before installation. and / or The fixed end is also provided with a pressing and locking component for pressing and sealing strip materials.

[0010] As a further improvement of this utility model, a finite surface is formed at the junction between the crimping end and the fixed end; and The locking part has a bushing end face on the side opposite to the adhesive part. The bushing end face can abut against the limiting surface after the locking part is embedded in the bushing groove, so that the optical cable sheath groove is aligned with the first crimping groove.

[0011] As a further improvement of this utility model, the limiting surface includes a base limiting surface located on one side of the pressing end and a pressing block limiting surface located on one side of the fixed pressing block; the pressing block limiting surface can be flush with the base limiting surface after the fixed pressing block is connected to the pressing end.

[0012] As a further improvement of this utility model, the axis of the optical unit through hole is arranged parallel to the axis of the reinforcing core groove, and the reinforcing core groove is provided on at least one side of the optical unit through hole in the radial direction. or The axis of the optical unit through hole is aligned with the axis of the reinforcing core groove.

[0013] As a further improvement of this utility model, one end of the reinforcing core groove is connected to the optical cable sheath groove, and its other end does not extend to the end of the adhesive part; and The adhesive part has an overflow hole along the axial direction at one end opposite to the locking part, which connects to the optical cable sheath groove.

[0014] As a further improvement of this utility model, at least one bushing limiting groove is provided on the two side walls facing the bushing insertion groove along the second direction; wherein, the second direction is a horizontal direction perpendicular to the first direction; Accordingly, a lateral limiting member is provided on the outer periphery of the locking part, which can be embedded in the corresponding bushing limiting groove when the locking part is embedded in the bushing insertion groove.

[0015] As a further improvement of this utility model, the fixing block and the fixing base are detachably connected by multiple locking components; or One end of the fixed pressure block is hinged to the fixed base, and the other end can be detachably connected to the fixed base through a locking member.

[0016] As a further improvement of this utility model, it also includes heat shrink tubing; One end of the heat-shrinkable tube can be heat-shrinkably fitted onto the outer periphery of the cable-passing tube, and the other end protrudes from the end of the cable-passing tube, so that the other end can be heat-shrinkably fitted onto the outer periphery of the optical cable on the inlet side of the cable-passing tube after the optical cable is connected to the first optical cable fixing mechanism.

[0017] As a further improvement of this utility model, the optical cable fixing mechanism is a second optical cable fixing mechanism; the second optical cable fixing mechanism can be connected and locked in the cable tube, and includes an end sleeve and a fixing sleeve arranged sequentially along the optical cable threading direction, and a locking ring is provided corresponding to the fixing sleeve; One end of the end sleeve is provided with a clamping assembly for clamping the outer periphery of the optical cable, and the other end can be detachably connected to the end of the fixed sleeve. The fixing sleeve can be coaxially embedded in the cable-passing tube, and a locking ring groove is formed on the outer periphery of the end opposite to the end sleeve. The locking ring groove can extend out of the outlet of the cable-passing tube after the fixing sleeve is embedded in the cable-passing tube; and The locking ring is set close to the side wall of the inner cavity and can lock the fixing sleeve axially in the cable tube after engaging the locking ring groove.

[0018] As a further improvement of this utility model, the second optical cable fixing mechanism also includes a sealing insert; The sealing insert has a sealing hole in the middle for the optical cable to pass through after the outer sheath is removed; and one end of the sealing insert is a first assembly section that can be sealed and embedded in the fixed sleeve, and the other end is a second assembly section that can be sealed and embedded in the end sleeve.

[0019] As a further improvement of this utility model, the end of the end sleeve facing away from the clamping assembly is embedded in the fixed sleeve and threadedly connected thereto; the outer diameter of the second assembly section is smaller than the outer diameter of the first assembly section, and an annular step surface is formed at the junction of the two, so that the sealing insert can abut against the end face of the end sleeve with the annular step surface when the second assembly section is embedded in the end of the end sleeve. and / or The first assembly section has a truncated cone portion at its end away from the second assembly section. The outer diameter of the truncated cone portion decreases sequentially in the direction from the second assembly section to the first assembly section. Correspondingly, the inner hole of the fixing sleeve has a tapered hole section. The sealing insert can be pushed by the end sleeve so that the truncated cone portion abuts against the inner wall surface of the tapered hole section.

[0020] As a further improvement of this utility model, a sealing ring groove is also provided on the outer periphery of the fixing sleeve, and a sealing ring is fitted in the sealing ring groove, so that the fixing sleeve can be pressed against the inner wall of the cable tube by the sealing ring after being embedded in the cable tube.

[0021] As a further improvement of this utility model, it also includes a fiber melting tray disposed in the inner cavity of the upper cover; The fiber splicing tray includes a tray body with a splice protection tube groove and a beam splitter groove; a hinged mounting component is provided on one side of the tray body, and it can be hinged to the side wall of the inner cavity through the hinged mounting component; and The disc body has several fixing holes, and a second mounting position is provided in the inner cavity of the upper cover, so that the fiber melting disc can be fixedly installed on the second mounting position through several connectors passing through the fixing holes.

[0022] As a further improvement of this utility model, the fixed sleeve has a fiber-threading notch for the optical unit to be led out at one end away from the end sleeve, and a reinforcing core fixing member for fixing the reinforcing core is provided at the end of the fixed sleeve.

[0023] As a further improvement of this utility model, the clamping assembly includes a clamping notch opened in the circumferential direction at the end of the end sleeve opposite to the fixed sleeve, and a movable pressure cover detachably connected to the clamping notch. The movable pressure cover can press the optical cable onto the fixed pressure wall of the end sleeve facing the clamping notch.

[0024] As a further improvement of this utility model, the clamping assembly further includes a pressure plate module that can be embedded between the movable pressure cover and the fixed pressure wall; the pressure plate module includes a fixed pressure plate that can be connected to the fixed pressure wall and a movable pressure plate that can be connected to the inner wall surface of the movable pressure cover, so that the optical cable can be pressed by the movable pressure plate onto the fixed pressure plate.

[0025] The aforementioned improved technical features can be combined with each other as long as they do not conflict with each other.

[0026] In summary, the beneficial effects of the above-described technical solutions conceived by this utility model compared with the prior art include: This utility model discloses a fiber distribution box, comprising an upper cover and a bottom plate. By placing the cable guide tube on the upper cover, the processes of fiber optic cable introduction and distribution are all performed on the upper cover, simplifying the connection and fixation process of the fiber optic cable in the distribution box, saving the operation time of guiding the fiber optic cable from the bottom plate to the upper cover, and avoiding the risk of the fiber optic cable being clamped between the upper and lower covers. Simultaneously, the combined design of the cable guide tube and the fiber optic cable fixing mechanism effectively ensures the connection reliability when the fiber optic cable is introduced into the distribution box, improves the tensile strength of the fiber optic cable end, and ensures the flexibility and reliability of the distribution box in use, demonstrating excellent application prospects. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the overall structure of the fiber distribution box in an embodiment of this utility model; Figure 2 This is a schematic diagram of the upper cover structure of the fiber distribution box in an embodiment of this utility model; Figure 3 This is a schematic diagram of the first optical cable fixing mechanism in the fiber distribution box cover in this embodiment of the present invention; Figure 4 This is a schematic diagram of the first optical cable fixing mechanism and the optical cable assembly in an embodiment of this utility model; Figure 5 This is a schematic diagram of the fixing base structure of the first optical cable fixing mechanism in this embodiment of the present invention; Figure 6 This is a schematic diagram of the fixing block structure of the first optical cable fixing mechanism in this embodiment of the present invention; Figure 7 , Figure 8 This is a schematic diagram of one type of locking bushing in the first optical cable fixing mechanism; Figure 9 This is a schematic diagram of another form of the locking bushing in the first optical cable fixing mechanism; Figure 10 This is a schematic diagram of the structure after the locking bushing in the first optical cable fixing mechanism is fixed to the end of the optical cable; Figure 11 This is a cross-sectional view of the structure when the first optical cable fixing mechanism is used to lock the end of the optical cable; Figure 12 This is a schematic diagram of the first optical cable fixing mechanism being assembled with the positioning slot in the upper cover of the fiber distribution box; Figure 13 This is a schematic diagram showing the heat shrink tubing installed on the cable conduit after the first optical cable fixing mechanism is assembled in the upper cover. Figure 14 This is a schematic diagram of the fiber distribution box in use based on the first optical cable fixing mechanism in this embodiment of the present invention; Figure 15 This is a schematic diagram of the fiber distribution box cover structure based on the second optical cable fixing mechanism in an embodiment of this utility model; Figure 16 This is a schematic diagram of the structure after the second optical cable fixing mechanism is installed in the fiber distribution box cover; Figure 17This is a cross-sectional view of the structure after the second optical cable fixing mechanism is installed in the fiber distribution box cover; Figure 18 This is a schematic diagram of the structure of the second optical cable fixing mechanism in an embodiment of this utility model; Figure 19 This is a structural cross-sectional view of the second optical cable fixing mechanism in an embodiment of this utility model; Figure 20 This is a schematic diagram of the locking ring structure that matches the second optical cable fixing mechanism in an embodiment of this utility model; Figure 21 This is a schematic diagram of the fiber splicing tray structure that matches the second optical cable fixing mechanism in this embodiment of the present invention; In all the accompanying drawings, the same reference numerals denote the same technical features, specifically: 100. Top cover; 200. Base plate; 300. First optical cable fixing mechanism; 400. Second optical cable fixing mechanism; 500. Fiber splicing tray; 600. Optical cable; 1. Fixed base; 2. Fixed pressure block; 3. Locking bushing; 4. Heat shrink tubing; 101. First crimping groove; 102. Locking hole; 103. Mounting hole; 104. Bushing insert groove; 105. Bushing limiting groove; 106. Crimping locking element; 107. Friction protrusion; 108. Mounting positioning groove; 109. Base limiting surface; 201. Second crimping groove; 202. Locking element; 203. Pressing block limiting surface; 301. Locking part; 302. Adhesive part; 303. Lateral limiting element; 304. Optical cable sheath groove; 305. Optical unit through hole; 306. Reinforcing core groove; 307. Bushing end face; 308. Glue overflow hole; 110. Adapter; 111. Cable conduit; 112. Positioning block; 113. First mounting position; 114. Second mounting position; 5. Fixing sleeve; 6. End sleeve; 7. Sealing insert; 8. Locking ring; 501. Reducing pipe body; 502. Reinforcing core fixing component; 503. Fiber threading notch; 504. Locking ring groove; 505. Sealing ring groove; 506. Sealing ring; 601. Fixed pressure plate; 602. Movable pressure plate; 603. Movable pressure cap; 604. Fixed clamping wall; 701. First assembly section; 702. Second assembly section; 511. Disc body; 512. Welding protection tube groove; 513. Splitter groove; 514. Hinged mounting component; 515. Fixing hole; 611. Optical unit. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model. Furthermore, the technical features involved in the various embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0030] In the description of this utility model, it should be understood that, unless otherwise explicitly specified and limited, the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model 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 this utility model.

[0031] Furthermore, unless otherwise expressly defined, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise expressly and specifically defined.

[0032] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0034] Below, for reference Figures 1-21 The fiber distribution box according to a preferred embodiment of the present invention is described.

[0035] like Figure 1 , Figure 2 As shown, the fiber distribution box in the preferred embodiment includes an upper cover 100 and a bottom plate 200. The upper cover 100 has an inner cavity with an opening on one side, and multiple mounting holes are provided in the inner cavity for mounting adapters 110, facilitating the subsequent alignment and installation of multiple adapters 110. Meanwhile, the bottom plate 200 can be connected to the open side of the upper cover 100 to close the open side.

[0036] As will be known to those skilled in the art, the aforementioned adapter 110 is mounted on the upper cover 100 in the following manner: Figure 1 , Figure 3 As shown, after the adapter 110 is installed in the mounting through hole, a portion of the adapter 110 protrudes from the mounting through hole, while the other portion remains in the inner cavity of the top cover 100.

[0037] Meanwhile, a cable tube 111 is provided on one side of the top cover 100 to connect the inside and outside of the top cover 100 (i.e., inside and outside the inner cavity), which is used to introduce the optical cable 600 to be split into the inner cavity.

[0038] Based on the integrated installation of the cable conduit 111 on the upper cover 100, there are more options for the connection method between the base plate 200 and the upper cover 100.

[0039] As an example, the connection between the base plate 200 and the top cover 100 is preferably a detachable connection. It is understood that the detachable connection between the base plate 200 and the top cover 100 (outer edges) can be accomplished by multiple connecting screws or bolts, which will not be elaborated here.

[0040] As another example, both the base plate 200 and the top cover 100 are made of plastic. In this case, based on the cable conduit 111 on the top cover 100, the connection between the base plate 200 and the top cover 100 does not need to consider the transmission of the optical cable 600 between the base plate 200 and the top cover 100 after the cable is threaded through. This provides the conditions for hot plate welding connection between the base plate 200 and the top cover 100. That is, by heating and melting the opening side of the top cover 100 and the end face of the base plate 200 to be connected, the base plate 200 and the top cover 100 are hot plate welded together. At this time, the base plate 200 and the top cover 100 are fixedly connected, which can fully ensure the integrity and sealing of the fiber distribution box after the base plate 200 is installed.

[0041] Furthermore, the fiber distribution box also includes an optical cable fixing mechanism corresponding to the cable guide tube 111, used to fix the end of the optical cable 600 introduced into the fiber distribution box; wherein, the optical cable fixing mechanism can be installed in the inner cavity of the upper cover 100 on the side of the outlet of the cable guide tube 111 (i.e., the end of the cable guide tube 111 near the inner cavity of the upper cover 100), or the optical cable fixing mechanism can be connected and locked in the cable guide tube 111.

[0042] By simultaneously mounting the cable conduit 111 and adapter 110 on the upper cover 100, both the end fixing and fiber splitting connection of the optical cable 600 are completed on the upper cover 100, simplifying the end connection and fiber splitting connection processes of the optical cable 600 and improving the efficiency of subsequent connection and installation of the base plate 200. Furthermore, the integrated mounting of the cable conduit 111 on the upper cover 100 provides more possibilities for the selection of connection methods for the base plate 200, thereby meeting the installation and use of the fiber distribution box under different application requirements. In addition, the optical cable fixing mechanism corresponding to the cable conduit 111 ensures accurate end fixing of the optical cable 600 introduced into the fiber distribution box, improving the tensile strength of the optical cable 600 when used in the fiber distribution box, and thus ensuring the reliability of the fiber distribution box during application.

[0043] More specifically, to ensure the sealing between the base plate 200 and the top cover 100, it is preferable to provide an annular sealing gasket on the surface of the base plate 200 and / or the four-sided end faces of the top cover 100 to improve the sealing performance after the base plate 200 and the top cover 100 are connected at the opening side.

[0044] Furthermore, for the optical cable fixing mechanism that fixes the end of the optical cable 600 in the preferred embodiment, this utility model provides two design schemes: a first optical cable fixing mechanism 300 installed and fixed in the inner cavity of the upper cover 100 and a second optical cable fixing mechanism 400 connected and locked in the cable tube 111. Both optical cable fixing mechanisms can realize the introduction and connection fixing of the end of the optical cable 600 on the fiber distribution box.

[0045] Specifically, for the first optical cable fixing mechanism 300 in the preferred embodiment, it can be installed in the inner cavity of the upper cover 100 on the outlet side of the cable conduit 111, and its structure is as follows: Figures 3-13 As shown in the image.

[0046] like Figure 4 As shown, the first optical cable fixing mechanism 300 in the preferred embodiment includes a fixing base 1, a fixing block 2, and a locking bushing 3.

[0047] The fixed base 1 has a crimping end at one end and a fixing end at the other end for fixing the locking bushing 3. The crimping end crimps the unstripped end of the optical cable 600, and the fixing end fixes the locking bushing 3. Specifically, the top surface of the crimping end has a first crimping groove 101 along a first direction, and the top surface of the fixing end has a bushing insertion groove 104, which is located on one side of the first crimping groove 101 along the first direction.

[0048] It is understood that after the first optical cable fixing mechanism 300 is installed in the inner cavity of the upper cover 100, the aforementioned first direction is preferably parallel to the axis of the cable guide tube 111, and the end of the first crimping groove 101 is further preferably coaxially aligned with the cable guide tube 111. In this way, the optical cable 600 can be coaxially introduced from the cable guide tube 111, and excessive bending is avoided when connecting the first optical cable fixing mechanism 300.

[0049] Meanwhile, the fixing block 2 is detachably connected to the crimping end of the fixing base 1, and is used to press the unstripped end (the end with the outer sheath) of the optical cable 600 into the first crimping groove 101.

[0050] Furthermore, the locking bushing 3 includes a locking part 301 and an adhesive part 302 coaxially arranged. The locking part 301 can achieve limiting locking in the first direction after being embedded in the bushing insertion groove 104. The locking part 301 has an optical cable sheath groove 304, which allows the end of the optical cable held by the fixing block 2 to be embedded and fixed in the optical cable sheath groove 304. Meanwhile, the adhesive part 302 has a through hole 305 for optical unit 611 and a reinforcing core groove 306. The through hole 305 is used for the optical unit 611 in the optical cable 600 to pass through, and the reinforcing core groove 306 is used to accommodate the reinforcing core of the optical cable 600 and to achieve adhesive fixation of the reinforcing core.

[0051] By utilizing the aforementioned design of the first optical cable fixing mechanism 300 in the preferred embodiment, multi-level fixing of the end of the optical cable 600 can be achieved (first-level pressing of the fixing block 2, second-level locking of the reinforcing core by the locking bushing 3, and third-level locking brought about by the limiting of the inner wall of the upper cover 100 to the first optical cable fixing mechanism 300), and providing sufficient tensile strength for the optical cable 600 after the end is fixed, ensuring the reliability of the optical cable 600 after the end is fixed, and avoiding the phenomenon of accidental pull-out of the optical cable 600 due to tensile force (such as dragging and laying involved in optical cable wiring construction) after the end is fixed.

[0052] In actual design, the installation and fixation of the first optical cable fixing mechanism 300 in the inner cavity of the upper cover 100 is achieved based on the connection of the fixing base 1 in the inner cavity of the upper cover 100. At this time, a first mounting position 113 is provided in the inner cavity of the upper cover 100, and mounting holes 103 are provided on the fixing base 1, for example, mounting holes 103 are provided in pairs on the fixing end, such as... Figure 5 As shown in the diagram. Based on the alignment of the mounting hole 103 with the first mounting position 113, the fixed base 1 can be mounted at the first mounting position 113 by two connectors (e.g., screws) passing through the mounting hole 103.

[0053] Furthermore, to increase the reliability of the optical cable 600 during crimping and locking, it is preferable to provide a second crimping groove 201 on one end face of the fixed pressure block 2, so that the second crimping groove 201 can be directly opposite the first crimping groove 101 after the fixed pressure block 2 is connected to the crimping end, and combine with the first crimping groove 101 to form a crimping hole with both ends through.

[0054] At this time, the outer sheath of the optical cable 600 is pressed by the inner wall surfaces of the two crimping grooves. The second crimping groove 201 is used to increase the contact area during crimping and locking, thereby improving the stability and reliability of the optical cable 600 after crimping and fixing.

[0055] As another example, in actual installation, it is also preferable to provide a plurality of friction protrusions 107 on the inner wall surface of the first crimping groove 101 and / or the second crimping groove 201. The friction protrusions 107 are provided to increase the friction between the crimping groove and the outer sheath of the optical cable 600, thereby improving the reliability of the crimping.

[0056] More specifically, a limiting surface is formed at the junction between the crimping end and the fixing end; and the locking part 301 has a bushing end face 307 on the side opposite to the adhesive part 302. The bushing end face 307 can abut against the limiting surface after the locking part 301 is inserted into the bushing insertion groove 104, so that the optical cable sheath groove 304 is aligned with the first crimping groove 101.

[0057] In actual installation, the end of the optical cable 600 to be fixed is introduced from the side of the fixing base 1 away from the fixed end, pressed and fixed by the fixing block 2, and then glued to the locking bushing 3. At this time, the direction of the tension on the optical cable 600 is from the fixed end to the crimping end, which means that the locking bushing 3 has a tendency to move from the optical cable 600 towards the crimping end. Therefore, based on the setting of the limiting surface, it can effectively provide physical obstruction for the fixed end of the optical cable 600, improve the reliability of the axial limiting of the locking bushing 3, and thus improve the accuracy of fixing the end of the optical cable 600.

[0058] As a specific example, in a preferred embodiment, the limiting surface includes a base limiting surface 109 located on one side of the crimping end and a pressing block limiting surface 203 located on one side of the fixing pressing block 2. The pressing block limiting surface 203 can be flush with the base limiting surface 109 after the fixing pressing block 2 is connected to the crimping end, and the two abut against the bushing end face 307 on the locking part 301, ensuring the reliability of the locking bushing 3 under tension of the optical cable 600.

[0059] Furthermore, in actual installation, depending on the different specifications of the optical cable 600 model, the locking bushing 3 in the preferred embodiment has a variety of specifications to choose from.

[0060] As an example, such as Figure 7 , Figure 8 As shown, the optical cable 600 is a cable type with lateral reinforcement. In this case, the axis of the optical unit through-hole 305 is parallel to the axis of the reinforcing core groove 306, and the reinforcing core groove 306 is provided on at least one radial side of the optical unit through-hole 305, for example... Figure 8 As shown, reinforcing core grooves 306 are provided on both radial sides of the optical unit through hole 305. More specifically, the optical unit through hole 305 and the reinforcing core grooves 306 are laterally connected to facilitate the machining of the locking bushing 3.

[0061] As another example, the optical cable 600 is a round cable with a central reinforcing member. In this case, the axis of the optical unit through-hole 305 coincides with the axis of the reinforcing core groove 306, meaning the reinforcing core and the optical unit 611 are fixed based on the same groove. Figure 9 As shown in the image.

[0062] More specifically, in the preferred embodiment, one end of the reinforcing core groove 306 is connected to the optical cable sheath groove 304, and the other end does not extend to the end of the adhesive portion 302. Furthermore, it is also preferable that an overflow hole 308 communicating with the optical cable sheath groove 304 is provided axially at the end of the adhesive portion 302 opposite to the locking portion 301.

[0063] By utilizing the overflow hole 308, it is possible to check whether there is any glue overflow, thereby determining whether the glue in the locking bushing 3 is full, thus ensuring the reliability of the optical cable 600 end being glued and fixed to the locking bushing 3.

[0064] In addition, in order to improve the compatibility of the first optical cable fixing mechanism 300 and the reliability of the end fixing, it is preferable to provide a crimping locking member 106 for crimping strip materials on the fixing end. In this case, the strip material (such as aramid, non-woven fabric and other covering materials) covered by the optical cable 600 can be crimped and locked by the crimping locking member 106.

[0065] In one specific embodiment, the crimping locking member 106 is disposed on the side of the fixed end away from the bushing recess 104. In this case, the crimping locking member 106 includes a pressure plate and a connector (e.g., a connecting screw). The connector passes through the pressure plate and is connected to the fixed end. Thus, the strip material can be wrapped around the outer periphery of the connector and then pressed against the surface of the fixed end by the pressure plate.

[0066] The aforementioned structure is particularly suitable for optical cables without a reinforcing core. In this case, the locking bushing 3 can be used without assembly. After the optical cable 600 is pressed and locked by the fixing block 2, the strip material covering the optical unit 611 can be pulled to the crimping locking member 106 and locked. The crimping locking member 106 and the combined strip material complete the tensile connection at the end of the optical cable 600, thereby ensuring the reliability of the optical cable 600 end fixation.

[0067] Furthermore, for fixing the locking bushing 3 at the fixed end, at least one bushing limiting groove 105 is provided on the two side walls of the bushing insert groove 104 facing the second direction; wherein, the second direction is a horizontal direction perpendicular to the first direction. Correspondingly, a lateral limiting member 303 is provided on the outer periphery of the locking part 301, and the number and position of the lateral limiting members 303 correspond to the number and position of the bushing limiting grooves 105, so that when the locking part 301 is inserted into the bushing insert groove 104, the lateral limiting members 303 can be inserted into the corresponding bushing limiting grooves 105, for example... Figures 7-9 The limiting protrusion in the middle.

[0068] More preferably, in actual installation, the lateral limiting members 303 are multiple axially spaced. In this case, the bushing limiting grooves 105 are also preferably multiple axially spaced, so as to ensure the reliability of the axial fixation of the locking bushing 3.

[0069] Furthermore, in actual installation, the fixing block 2 and the fixing base 1 can preferably be detachably connected by multiple locking elements 202. For example, in such a case... Figure 4 In the preferred embodiment shown, the fixing block 2 is connected to the pressing end of the fixing base 1 by two locking elements 202 (specifically screws). At this time, two locking holes 102 are correspondingly formed on the top surface of the pressing end, such as... Figure 5 As shown in the image.

[0070] As another example, one end of the fixing block 2 is hinged to the fixing base 1, and the other end is connected by a locking member 202 (e.g., Figure 4 The screw shown Figure 5 The combination of screw holes shown is detachably connected to the fixed base 1.

[0071] To ensure the airtightness of the first optical cable fixing mechanism 300 after its installation, a heat-shrinkable tube 4 is further preferably provided for the cable insertion tube 111. One end of the heat-shrinkable tube 4 is fitted onto the outer circumference of the cable insertion tube 111, and the other end protrudes from the end of the cable insertion tube 111. This other end can be heat-shrinked onto the outer circumference of the optical cable 600 on the inlet side of the cable insertion tube 111 after the optical cable 600 is connected to the first optical cable fixing mechanism 300. Figure 13 , Figure 14 As shown in the image.

[0072] By using the heat shrink tubing 4, after the cable tube 111 and the optical cable 600 are installed, the entrance of the cable tube 111 can be reliably sealed, preventing external impurities from entering the fiber distribution box through the cable tube 111.

[0073] It is understandable that, for the heat shrink tubing 4, one end can be pre-heat-shrink and fitted onto the outer circumference of the cable threading tube 111, and the other end can be heat-shrinked after the cable threading is completed. Obviously, as needed, the heat shrink tubing 4 can also be fitted onto the outer circumference of the cable threading tube 111 before the optical cable 600 is threaded into the cable threading tube 111, and then heat-shrink and fixed onto the outer circumference of the cable threading tube 111 and the optical cable 600 after the first optical cable fixing mechanism 300 has completed its setup.

[0074] Further preferably, in order to achieve rapid positioning and installation of the fixed base 1 within the inner cavity of the upper cover 100, that is, to achieve rapid positioning between the mounting hole 103 and the first mounting position 113, it is also preferable to provide a mounting positioning groove 108 at the bottom of the fixed base 1, and to provide a positioning block 112 within the inner cavity of the upper cover 100. Then, by utilizing the matching between the mounting positioning groove 108 and the positioning block 112, rapid positioning of the fixed base 1 before installation within the inner cavity can be achieved. Furthermore, by utilizing the embedded matching between the mounting positioning groove 108 and the positioning block 112, the axial locking of the fixed base 1 can be further improved, thereby enhancing the tensile strength of the optical cable 600.

[0075] For the first optical cable fixing mechanism 300 in the preferred embodiment, its usage process is preferably as follows (preferably taking a laterally reinforced cable type as an example): The optical cable 600 to be fixed at the end is stripped at the end, and the optical unit 611 and the reinforcing core of the optical cable 600 are stripped out respectively. The length of the reinforcing core beyond the unstripped end of the optical cable 600 is reserved according to the length of the reinforcing core groove 306 in the locking bushing 3. The end of the optical cable 600 is passed through the cable tube 111 fitted with heat shrink tubing 4 and extended into the inner cavity of the upper cover 100. Then, the optical unit 611 is inserted from one end of the locking part 301 and passes through the optical unit through hole 305. The reinforcing core is inserted from one end of the locking part 301 into the reinforcing core groove 306, and glue is injected into the locking bushing 3 until the glue in the locking bushing 3 is full. At this time, the unstripped end of the optical cable 600 is embedded in the optical cable sheath groove 304. After the glue in the locking bushing 3 cures, the following is obtained: Figure 10 The end structure is shown. Next, the locking bushing 3 is inserted into the bushing insertion groove 104, and the optical cable 600 on one side of the locking bushing 3 is placed in the first crimping groove 101. Then, the fixing block 2 is connected to the fixing base 1, and the fixing block 2 presses the optical cable 600 into the first crimping groove 101, completing the fixation of the end of the optical cable 600 on the fixing base 1. Finally, the fixing base 1 is fitted and matched with the positioning block 112 using the mounting positioning groove 108, achieving alignment between the mounting hole 103 and the first mounting position 113. Finally, the fixing base 1 is installed in the first mounting position 113 using multiple connectors passing through the mounting hole 103, realizing the introduction of the optical cable 600 into the fiber distribution box and achieving end fixation. After completing the above settings, connect each fiber optic cable to one end of the adapter 110 located in the inner cavity of the upper cover 100. After completing the fiber splitting connection of the optical cable 600, finally connect the base plate 200 to the open side of the upper cover 100 to seal the fiber splitting box and ensure its normal use.

[0076] Furthermore, the second optical cable fixing mechanism 400 in the preferred embodiment is configured as follows: Figures 15-21 As shown in the image.

[0077] Specifically, the second optical cable fixing mechanism 400 can be connected and locked in the cable conduit 111, and includes a fixing sleeve 5, an end sleeve 6, and a locking ring 8. One end of the end sleeve 6 is provided with a clamping component for clamping the outer periphery of the optical cable 600, and the other end can be detachably connected to the end of the fixing sleeve 5.

[0078] As an example, one end of the end sleeve 6 is embedded in the inner cavity of one end of the fixed sleeve 5 and is threadedly connected to it, such as... Figure 19 As shown in the image.

[0079] Meanwhile, the fixing sleeve 5 can be coaxially embedded in the cable tube 111, and a locking ring groove 504 is provided on the outer periphery of the end opposite to the end sleeve 6. The locking ring groove 504 can extend out of the outlet of the cable tube 111 after the fixing sleeve 5 is embedded in the cable tube 111.

[0080] Correspondingly, the locking ring 8 is set close to the inner cavity side wall of the upper cover 100, and can axially lock the fixing sleeve 5 into the cable tube 111 after engaging the locking ring groove 504.

[0081] By locking the fixed sleeve 5 axially with the locking ring 8, connecting the fixed sleeve 5 and the end sleeve 6 at the end, and clamping and locking the outer periphery of the optical cable 600 with the end sleeve 6, the second optical cable fixing mechanism 400 can be reliably fixed in the cable tube 111, thereby achieving the end fixing of the optical cable 600 at the fiber distribution box.

[0082] More specifically, to ensure the sealing performance of the second optical cable fixing mechanism 400 after its installation, a sealing insert 7 is preferably provided, such as... Figure 17 , Figure 19 As shown in the figure. The sealing insert 7 has a sealing hole in the middle for the optical cable to pass through after the outer sheath is removed; and one end of the sealing insert 7 is a first assembly section 701 that can be sealed and embedded in the fixing sleeve 5, and the other end is a second assembly section 702 that can be sealed and embedded in the end sleeve 6.

[0083] As an example, the sealing insert 7 has a cylindrical structure. Its second assembly section 702 can be inserted into the end of the end sleeve 6 by interference fit, and its first assembly section 701 is inserted into the inner cavity of the fixed sleeve 5 along with the end sleeve 6. The inner cavity of the fixed sleeve 5 is sealed by the tight fit between the first assembly section 701 and the inner wall of the fixed sleeve 5.

[0084] As another example, the outer diameter of the second assembly section 702 is smaller than that of the first assembly section 701, and an annular stepped surface is formed at the junction of the two. This allows the sealing insert 7 to abut against the end face of the end sleeve 6 with the annular stepped surface when the second assembly section 702 is embedded in the end of the end sleeve 6, thus completing the axial locking and sealing between the end sleeve 6 and the sealing insert 7. At the same time, the first assembly section 701 can be sealed and embedded in the inner cavity of the fixed sleeve 5 when the end of the end sleeve 6 is embedded in the fixed sleeve 5. The tight fit between the first assembly section 701 and the inner wall of the fixed sleeve 5 achieves the sealing of the inner cavity of the fixed sleeve 5.

[0085] More specifically, the end of the first assembly section 701 facing away from the second assembly section 702 is preferably provided with a frustum portion, that is, the outer diameter of the end of the first assembly section 701 increases from one end face side to the middle side. At the same time, the inner hole of the fixing sleeve 5 has a tapered section, so that the sealing insert 7 can be pushed by the end sleeve 6 to press against the inner wall surface of the tapered section with the frustum portion.

[0086] As the sealing insert 7 is continuously embedded in the inner hole of the fixed sleeve 5, the frustum portion of the first assembly section 701 is continuously squeezed, causing the inner diameter of the central sealing hole to continuously shrink, thereby covering and pressing the stripped optical cable (such as optical fiber, reinforcing core, etc.) passing through the sealing hole, ensuring the seal between the sealing insert 7 and the stripped optical cable.

[0087] In actual installation, one end of the optical cable 600 can be matched with the sealing insert 7 after passing through the end sleeve 6. Then, the assembly between the end sleeve 6 and the sealing insert 7 is achieved through the matching between the second assembly section 702 of the sealing insert 7 and the end sleeve 6. Subsequently, the sealing assembly between the first assembly section 701 and the fixed sleeve 5 can be achieved through the end connection between the end sleeve 6 and the fixed sleeve 5.

[0088] As an example, the end connection between the end sleeve 6 and the fixed sleeve 5 is preferably as follows: Figure 19 The threaded connection shown here has an external thread on the outer circumference of the end sleeve 6 and an internal thread on the inner circumference of the end sleeve 5, with the two threads locked together. Of course, the positions of the aforementioned internal and external threads can be interchanged, which will not be elaborated here.

[0089] Furthermore, in order to ensure the sealing performance of the second optical cable fixing mechanism 400 and the cable tube 111 after installation, it is preferable to provide a sealing ring groove 505 around the outer periphery of the fixing sleeve 5, and to embed a sealing ring 506 in the sealing ring groove 505. The tight fit between the sealing ring 506 and the inner wall of the cable tube 111 can achieve a reliable seal between the fixing sleeve 5 and the cable tube 111.

[0090] In actual installation, the fixed sleeve 5 is configured as a variable diameter type, that is, including, for example... Figure 18 The variable diameter pipe body 501 shown in the diagram has a sealing ring groove 505 and a locking ring groove 504 located at corresponding positions on the outer periphery of the variable diameter pipe body 501. Correspondingly, a structure is formed in the inner cavity of the cable conduit 111 as shown in the diagram. Figure 17 The variable diameter inner hole shown is used to achieve a sealed fit between the fixed sleeve 5 and the cable tube 111.

[0091] As an example, an annular step is formed between the locking ring groove 504 and the sealing ring groove 505 of the variable diameter tube body 501. Correspondingly, an annular limiting surface is formed in the inner cavity of the cable tube 111. By utilizing the mutual abutment between the annular step and the annular limiting surface, the fixing sleeve 5 can be quickly embedded into place, simplifying the assembly process of the second optical cable fixing mechanism 400 on the fiber distribution box.

[0092] Furthermore, corresponding to the arrangement of the second optical cable fixing mechanism 400, a fiber splicing tray 500 is also provided in the inner cavity of the upper cover 100, which is preferably located on the side of the inner cavity of the upper cover 100 away from the cable tube 111.

[0093] The fiber splicing tray 500 includes a tray body 511 with a splice protection tube groove 512 and a beam splitter groove 513, such as Figure 21 As shown in the diagram. Meanwhile, a hinged mounting member 514 is provided on one side of the disc body 511, and can be hinged to the side wall of the inner cavity via the hinged mounting member 514, as shown in the diagram. Figure 15 As shown in the image.

[0094] More specifically, the disc body 511 has several fixing holes 515, and a second mounting position 114 is provided in the inner cavity of the upper cover 100, so that the fiber melting disc 500 can be fixedly mounted on the second mounting position 114 through several connectors passing through the fixing holes 515.

[0095] By using the fusion splice tray 500, the fiber unit in the optical cable 600 after the end is fixed can be spliced ​​and split, so as to meet the connection between the optical fiber and the adapter 110.

[0096] To further improve the reliability of the optical cable 600 end fixing and the tensile strength of the optical cable 600 end after it is installed on the fiber distribution box, it is also preferable to open a fiber threading notch 503 for the optical unit 611 to be led out at the end of the fixing sleeve 5 away from the end sleeve 6, and to provide a reinforcing core fixing member 502 for fixing the reinforcing core at the end of the fixing sleeve 5.

[0097] By connecting the reinforcing core fixing member 502 to the reinforcing core in the optical cable 600, the end of the optical cable 600 can be securely connected to the second optical cable fixing mechanism 400. Correspondingly, the optical unit 611, which is used to connect the adapter 110 or the fiber splicing tray 500, can be led out from the fiber threading notch 503, ensuring the reliability of the optical unit 611 being led out and connected.

[0098] Furthermore, for the end sleeve 6 in the preferred embodiment, the clamping assembly at its end preferably includes a clamping notch opened in the circumferential direction at the end of the end sleeve 6 opposite to the fixed sleeve 5 and a movable pressure cap 603 detachably connected to the clamping notch. By locking the movable pressure cap 603 on the clamping notch, the optical cable 600 can be pressed against the fixed pressure wall 604 facing the clamping notch by the movable pressure cap 603, thereby achieving end fixation of the optical cable 600.

[0099] In actual installation, when the outer diameter of the optical cable 600 changes (e.g., the outer diameter becomes smaller), the movable pressure cover 603 alone cannot press the optical cable 600 firmly onto the fixed pressure wall 604. As another example, it is preferable to provide a detachable pressure plate module between the movable pressure cover 603 and the fixed pressure wall 604.

[0100] like Figure 19As shown, the pressure plate module in the preferred embodiment includes a fixed pressure plate 601 that can be connected to the fixed pressure wall 604 and a movable pressure plate 602 that can be connected to the inner wall of the movable pressure cover 603, so that the optical cable 600 can be pressed onto the fixed pressure plate 601 by the movable pressure plate 602, thereby accommodating the end fixing of optical cables 600 with different outer diameters.

[0101] More specifically, regarding the fixing of the pressure plate module, in the preferred embodiment, an embedding groove is provided on the inner wall surface of the fixed pressing wall 604 and the movable pressure cover 603, and a fixing post is respectively provided on the side of the movable pressure plate 602 and the fixed pressure plate 601 that are opposite to each other. By using the embedding of the fixing post in the embedding groove, the movable pressure plate 602 and the fixed pressure plate 601 can be set in the end sleeve 6.

[0102] Obviously, different pressure plate modules can be replaced according to different usage requirements, thereby adapting to the end fixing of optical cables with different outer diameters 600.

[0103] More preferably, in order to improve the reliability of clamping and fixing, protrusions for increasing friction are preferably provided on the inner wall surface of the fixed pressure wall 604, the inner wall surface of the movable pressure cover 603, and the inner wall surface of the movable pressure plate 602 opposite to the fixed pressure plate 601.

[0104] For the second optical cable fixing mechanism 400 in the preferred embodiment, its usage process is preferably as follows: The optical cable 600 to be fixed at its end is stripped at the end, and the optical unit 611 and the reinforcing core of the optical cable 600 are stripped out respectively. The end of the optical cable 600 is passed through the clamping assembly and the sealing insert 7, and the second assembly section 702 of the sealing insert 7 is embedded into the end sleeve 6 away from the clamping assembly. Then, the sealing insert 7 and the stripped optical cable 600 are embedded into the fixing sleeve 5, and the end sleeve 6 is connected to the fixing sleeve 5. At this time, the optical unit 611 protrudes from the fiber insertion notch 503, and the sealing insert 7 is squeezed, causing the sealing hole to shrink inward, realizing the sealing coverage between the sealing insert 7 and the optical unit 611. Then, the clamping assembly is locked so that the end of the optical cable 600 with the outer sheath can be reliably clamped by the clamping assembly. Correspondingly, the reinforcing core and / or aramid are locked on the reinforcing core fixing member 502. After the above process, the assembly of the second optical cable fixing mechanism 400 and the end fixing of the optical cable 600 on the second optical cable fixing mechanism 400 are completed.

[0105] Furthermore, the second optical cable fixing mechanism 400 is embedded into the cable insertion tube 111. After being embedded in place, the locking ring groove 504 extends into the inner cavity of the upper cover 100. At this time, the locking ring 8 is matched with the locking ring groove 504 to lock the second optical cable fixing mechanism 400 in the cable insertion tube 111, thereby realizing the introduction and end fixing of the optical cable 600 on the fiber distribution box. Finally, the corresponding operations between the optical unit 611 and the fusion splicing tray 500 are performed in the inner cavity of the upper cover 100 to complete the fiber splicing, splitting, and connection with the adapter 110, thus completing the connection and use of the optical cable 600 in the fiber distribution box. After completing the above operations, the base plate 200 is connected to the open side of the upper cover 100 to close the fiber distribution box and ensure its normal use.

[0106] It is evident that by utilizing two different optical cable fixing mechanisms and the targeted design of the fiber distribution box, the fiber distribution box can be equipped with either heat-shrink sealing (first optical cable fixing mechanism 300) or mechanical sealing (second optical cable fixing mechanism 400) in actual use, enhancing the versatility and flexibility of its functions. Simultaneously, regardless of the optical cable fixing mechanism, the structural design reliably secures the end of the optical cable 600 after it is introduced into the fiber distribution box, improving the tensile strength of the fixed end and preventing accidental pulling or detachment of the optical cable 600, thus ensuring the reliability and stability of the fiber distribution box. Furthermore, by placing the cable guide tube 111 on the upper cover 100, the upper cover 100 handles both the end fixing and splicing of the optical cable 600, reducing assembly time, lowering the risk of the optical cable 600 being clamped between the upper and lower covers, and reducing the application cost of the fiber distribution box.

[0107] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A fiber distribution box, comprising a top cover and a bottom plate, the top cover having an inner cavity with an opening on one side, and a plurality of mounting holes for mounting adapters provided in the inner cavity; the bottom plate being connectable to the opening side of the top cover for closing the opening side; characterized in that, One side of the upper cover is provided with a cable-passing tube connecting the inside and outside of the upper cover, used to introduce the optical cable to be split into the inner cavity; and The fiber distribution box also includes an optical cable fixing mechanism corresponding to the cable insertion tube, used to fix the end of the optical cable introduced into the fiber distribution box; the optical cable fixing mechanism can be installed in the inner cavity of the upper cover on the outlet side of the cable insertion tube, or the optical cable fixing mechanism can be connected and locked in the cable insertion tube.

2. The fiber distribution box according to claim 1, characterized in that, The optical cable fixing mechanism is a first optical cable fixing mechanism; the first optical cable fixing mechanism can be installed in the inner cavity of the upper cover on the side of the cable tube outlet, and includes a fixing base, a fixing pressure block and a locking bushing; One end of the fixed base is a crimping end, and the other end is a fixed end for fixing the locking bushing; the top surface of the crimping end is provided with a first crimping groove along a first direction, and the top surface of the fixed end is provided with a bushing insert groove, the bushing insert groove being located on one side of the first crimping groove along the first direction. The fixing block is detachably connected to the crimping end and is used to press the end of the optical cable into the first crimping groove. The locking bushing includes a locking part and an adhesive part arranged coaxially. The locking part can achieve limiting locking in a first direction after being embedded in the bushing insertion groove. The locking part has an optical cable sheath groove, so that the end of the optical cable held by the fixing block can be embedded and fixed in the optical cable sheath groove. The adhesive part has a through hole for optical unit and a reinforcing core groove. The through hole for optical unit to pass through in the optical cable, and the reinforcing core groove for accommodating the reinforcing core of the optical cable and achieving adhesive fixation of the reinforcing core.

3. The fiber distribution box according to claim 2, characterized in that, A second crimping groove is provided on one end face of the fixed pressure block; the second crimping groove can be directly opposite the first crimping groove after the fixed pressure block is connected to the crimping end, and can be combined with the first crimping groove to form a crimping hole through both ends; or A second pressing groove is provided on one end face of the fixed pressing block, and a plurality of friction protrusions are provided on the inner wall surface of the first pressing groove and / or the second pressing groove.

4. The fiber distribution box according to claim 3, characterized in that, The inner cavity of the upper cover is provided with a first mounting position, and the fixed base is provided with a mounting hole, so that the fixed base can be installed in the first mounting position through a number of connectors passing through the mounting hole; and / or The bottom of the fixed base is provided with an installation positioning groove, and a positioning block is provided in the inner cavity of the upper cover; by matching the installation positioning groove and the positioning block, the fixed base can be quickly positioned in the inner cavity before installation. and / or The fixed end is also provided with a pressing and locking component for pressing and sealing strip materials.

5. The fiber distribution box according to any one of claims 2 to 4, characterized in that, A finite surface is formed at the junction between the crimping end and the fixed end; and The locking part has a bushing end face on the side opposite to the adhesive part. The bushing end face can abut against the limiting surface after the locking part is embedded in the bushing groove, so that the optical cable sheath groove is aligned with the first crimping groove.

6. The fiber distribution box according to any one of claims 2 to 4, characterized in that, The axis of the optical unit through hole is arranged parallel to the axis of the reinforcing core groove, and the reinforcing core groove is provided on at least one side of the optical unit through hole in the radial direction. or The axis of the optical unit through hole is aligned with the axis of the reinforcing core groove.

7. The fiber distribution box according to claim 6, characterized in that, One end of the reinforcing core groove is connected to the optical cable sheath groove, and the other end does not extend to the end of the adhesive part; and the adhesive part is provided with an overflow hole that connects to its inner cavity.

8. The fiber distribution box according to any one of claims 2 to 4 and 7, characterized in that, At least one bushing limiting groove is provided on the two side walls directly opposite the bushing insertion groove along the second direction; wherein, the second direction is a horizontal direction perpendicular to the first direction; Accordingly, a lateral limiting member is provided on the outer periphery of the locking part, which can be embedded in the corresponding bushing limiting groove when the locking part is embedded in the bushing insertion groove.

9. The fiber distribution box according to any one of claims 2 to 4 and 7, characterized in that, The fixing block and the fixing base are detachably connected by multiple locking elements; or, one end of the fixing block is hinged to the fixing base, and the other end is detachably connected to the fixing base by a locking element.

10. The fiber distribution box according to any one of claims 2 to 4 and 7, characterized in that, It also includes heat shrink tubing; One end of the heat-shrinkable tube can be heat-shrinkably fitted onto the outer periphery of the cable-passing tube, and the other end protrudes from the end of the cable-passing tube, so that the other end can be heat-shrinkably fitted onto the outer periphery of the optical cable on the inlet side of the cable-passing tube after the optical cable is connected to the first optical cable fixing mechanism.

11. The fiber distribution box according to claim 1, characterized in that, The optical cable fixing mechanism is a second optical cable fixing mechanism; the second optical cable fixing mechanism can be connected and locked in the cable tube, and includes an end sleeve and a fixing sleeve arranged sequentially along the optical cable threading direction, and a locking ring is provided corresponding to the fixing sleeve; One end of the end sleeve is provided with a clamping assembly for clamping the outer periphery of the optical cable, and the other end can be detachably connected to the end of the fixed sleeve. The fixing sleeve can be coaxially embedded in the cable-passing tube, and a locking ring groove is formed on the outer periphery of the end opposite to the end sleeve. The locking ring groove can extend out of the outlet of the cable-passing tube after the fixing sleeve is embedded in the cable-passing tube; and The locking ring is set close to the side wall of the inner cavity and can lock the fixing sleeve axially in the cable tube after engaging the locking ring groove.

12. The fiber distribution box according to claim 11, characterized in that, The second optical cable fixing mechanism also includes a sealing insert; The sealing insert has a sealing hole in the middle for the optical cable to pass through after the outer sheath is removed; and one end of the sealing insert is a first assembly section that can be sealed and embedded in the fixed sleeve, and the other end is a second assembly section that can be sealed and embedded in the end sleeve.

13. The fiber distribution box according to claim 12, characterized in that, The end of the end sleeve facing away from the clamping assembly is embedded in the fixed sleeve and threadedly connected thereto; the outer diameter of the second assembly section is smaller than the outer diameter of the first assembly section, and an annular stepped surface is formed at the junction of the two, so that the sealing insert can abut against the end face of the end sleeve with the annular stepped surface when the second assembly section is embedded in the end of the end sleeve. and / or The first assembly section has a truncated cone portion at its end away from the second assembly section. The outer diameter of the truncated cone portion decreases sequentially in the direction from the second assembly section to the first assembly section. Correspondingly, the inner hole of the fixing sleeve has a tapered hole section. The sealing insert can be pushed by the end sleeve so that the truncated cone portion abuts against the inner wall surface of the tapered hole section.

14. The fiber distribution box according to any one of claims 11 to 13, characterized in that, The outer periphery of the fixed sleeve is also provided with a sealing ring groove, and a sealing ring is fitted in the sealing ring groove, so that the fixed sleeve can be pressed against the inner wall of the cable tube by the sealing ring after being inserted into the cable tube.

15. The fiber distribution box according to any one of claims 11 to 13, characterized in that, It also includes a fiber melting tray disposed in the inner cavity of the upper cover; The fiber splicing tray includes a tray body with a splice protection tube groove and a beam splitter groove; a hinged mounting component is provided on one side of the tray body, and it can be hinged to the side wall of the inner cavity through the hinged mounting component; and The disc body has several fixing holes, and a second mounting position is provided in the inner cavity of the upper cover, so that the fiber melting disc can be fixedly installed on the second mounting position through several connectors passing through the fixing holes.

16. The fiber distribution box according to any one of claims 11 to 13, characterized in that, The fixed sleeve has a fiber-threading notch for the optical unit to be led out at one end away from the end sleeve, and a reinforcing core fixing member for fixing the reinforcing core is provided at the end of the fixed sleeve.

17. The fiber distribution box according to any one of claims 11 to 13, characterized in that, The clamping assembly includes a clamping notch formed on the circumferential direction of the end sleeve opposite to the fixed sleeve, and a movable pressure cover detachably connected to the clamping notch. The movable pressure cover can press the optical cable onto the fixed pressure wall of the end sleeve facing the clamping notch.

18. The fiber distribution box according to claim 17, characterized in that, The clamping assembly further includes a pressure plate module that can be embedded between the movable pressure cover and the fixed pressure wall; the pressure plate module includes a fixed pressure plate that can be connected to the fixed pressure wall and a movable pressure plate that can be connected to the inner wall of the movable pressure cover, so that the optical cable can be pressed by the movable pressure plate onto the fixed pressure plate.

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