Fiber optic pre-terminated assembly

Abstract

This utility model discloses an optical cable pre-termination assembly, relating to the field of optical cable connection technology. It includes a first branch, a flexible tube, and an end seal. The first branch has a first cable passage formed within it, and one end of the first branch has a first inlet communicating with the first cable passage. The end of the first branch away from the first inlet has multiple first branch holes communicating with the first cable passage. The flexible tube has a receiving space formed within it, and one end of the flexible tube is fitted onto the outer wall of the first branch and screwed to the outer wall. The receiving space communicates with the first branch holes. The end seal is sealed and connected to the end of the flexible tube away from the first branch, and the end seal has a traction part. This utility model's optical cable pre-termination assembly facilitates the disassembly of the flexible tube without damaging it, has good reusability, and can achieve traction without the need for a traction net sleeve. The installation and removal steps are simple and quick.

Description

Technical Field

[0001] This utility model relates to the field of optical cable connection technology, and in particular to an optical cable pre-termination assembly. Background Technology

[0002] In traditional technology, fusion splicing is the primary method for connecting outdoor optical cables to indoor installations. This requires stripping the protective layer of the outdoor cable to expose the optical fibers and splicing them with the indoor fibers. This method demands highly specialized equipment and technicians, increasing construction costs and complexity. Secondly, fusion splicing is inefficient, especially with high-core-count cables, requiring significant time and manpower. Finally, fusion splicing presents significant maintenance challenges. Faults in the optical fiber require specialized personnel for inspection and repair, further increasing maintenance costs and time.

[0003] In related technologies, pre-terminated methods are used to connect outdoor optical cables indoors. This involves stripping the protective layer of the optical cable beforehand and connecting fiber optic connectors to the ends of the optical fibers. Fiber optic adapters are then installed indoors, and the outdoor optical cable is connected by inserting the fiber optic connectors into the adapters. However, because the protective layer of the pre-terminated cable has been stripped, the exposed optical fibers and connectors are susceptible to damage from external forces or rain when not in use. Furthermore, pre-terminated cables often require handling, and are at risk of damage from impacts or friction during transport. Therefore, related technologies use flexible protective sleeves to protect the stripped optical fibers and connectors, and then cover these sleeves with a traction net for easy movement. However, a problem arises: after the cable is connected indoors and put into use, the traction net and protective sleeve need to be removed. These removed sleeves are usually non-recoverable, resulting in poor reusability, and the multiple layers of protection make installation and removal cumbersome. Utility Model Content

[0004] The main purpose of this utility model is to propose a pre-terminated optical cable assembly, which aims to solve the problem that after the cable is put into use indoors, it is necessary to tear off the traction net sleeve and the protective sleeve. The torn protective sleeve and traction net sleeve are usually irreversible, resulting in poor reusability, and the installation and removal steps are complicated due to the multiple layers of protection.

[0005] To achieve the above objectives, the optical cable pre-termination assembly proposed in this utility model includes a first branch, a flexible tube, and an end seal. The first branch has a first cable passage formed within it, and one end of the first branch has a first inlet communicating with the first cable passage. The end of the first branch away from the first inlet has multiple first branch holes communicating with the first cable passage. The flexible tube has a receiving space formed within it, and one end of the flexible tube is sleeved on and screwed to the outer wall of the first branch. The receiving space communicates with the first branch holes. The end seal is sealed to the end of the flexible tube away from the first branch, and the end seal has a traction portion.

[0006] In one embodiment, the end cap is detachably connected to the flexible tube.

[0007] In one embodiment, the end seal is screwed to the flexible tube.

[0008] In one embodiment, the optical cable pre-termination assembly further includes a plurality of branch sleeves, each of which is connected to the first splitter, and the inner cavity of each branch sleeve is connected to a first branch hole.

[0009] In one embodiment, the optical cable pre-termination assembly further includes a second brancher; the second brancher has a second cable passage formed therein, one end of the second brancher is provided with a second cable inlet communicating with the second cable passage, and the end of the second brancher away from the second cable inlet is provided with a plurality of second branch holes communicating with the second cable passage; the periphery of the second cable inlet is connected to the end of the branch sleeve away from the first brancher, and the second cable inlet communicates with the inner cavity of the branch sleeve.

[0010] In one embodiment, any two of the plurality of branch sleeves have unequal lengths.

[0011] In one embodiment, the first splitter includes an outer frame, a tail sleeve assembly, and a wire splitting assembly. A first wire passage is formed within the outer frame, and a first opening and a second opening are formed at both ends of the first wire passage, respectively. A first wire inlet is formed on the tail sleeve assembly, and the tail sleeve assembly is connected to the periphery of the first opening, with the first wire inlet communicating with the first opening. The wire splitting assembly is provided with at least two first wire splitting holes, and the wire splitting assembly covers the second opening and is connected to the periphery of the second opening, with the second opening communicating with the first wire splitting holes.

[0012] In one embodiment, the tail sleeve assembly includes a threading sleeve, a first fixing sleeve, and a wire fastener. The threading sleeve forms a first inlet. A first protrusion extending circumferentially along the outside of the threading sleeve is formed. A rib extending circumferentially along the inside of the first opening is formed on the inner wall of the first opening. The threading sleeve passes through the first opening, and the first protrusion is located within the first wire passage. The first fixing sleeve is screwed to the outer wall of the threading sleeve and located outside the first wire passage. The rib is limited between the first protrusion and the first fixing sleeve. The wire fastener includes a movable clamp and a stationary clamp. The stationary clamp is disposed within the wire passage and fixedly connected to the threading sleeve. The movable clamp and the stationary clamp are detachably connected. A clamping space is formed between the movable clamp and the stationary clamp. A tapered protrusion is provided on the side of the movable clamp and / or the stationary clamp facing the clamping space.

[0013] In one embodiment, the splitter assembly includes a splitter cover and a second fixing sleeve. The splitter cover has at least two first splitter holes, and the outer wall of the splitter cover has a second protrusion extending circumferentially along the splitter cover. The splitter cover covers the second opening and extends into the second opening, and the second protrusion abuts against the periphery of the second opening. The second fixing sleeve is sleeved on the outside of the splitter cover and connected to the outer frame, and the second protrusion is limited between the second fixing sleeve and the outer periphery of the second opening.

[0014] In one embodiment, the traction part is a traction hole or a traction hook.

[0015] The optical cable pre-termination assembly proposed in this utility model includes a first branch, a flexible tube, and an end seal. The first branch has a first cable passage formed inside, and one end of the first branch has a first inlet communicating with the first cable passage. The end of the first branch away from the first inlet has multiple first branch holes communicating with the first cable passage. The flexible tube has a receiving space formed inside, and one end of the flexible tube is sleeved on the outer wall of the first branch and screwed to the outer wall of the first branch. The receiving space communicates with the first branch holes. The end seal is sealed and connected to the end of the flexible tube away from the first branch, and the end seal has a traction part. This invention involves installing a flexible tube over a first branch connector and screwing the flexible tube to the outer wall of the first branch connector. This allows the flexible tube to be detached from the first branch connector by twisting the flexible tube or the first branch connector without damaging the flexible tube. An end seal is provided on the flexible tube to ensure its internal cavity is sealed, preventing liquid or dust from entering and damaging the optical fiber and connectors. The end seal has a traction part, allowing for the movement of the first branch connector and optical cable without the need for an additional traction net. The screwed connection between the flexible tube and the first branch connector facilitates the removal of the flexible protective tube after installation indoors and provides resistance to significant traction forces before installation or during movement. In summary, this invention's pre-terminated optical cable assembly facilitates the removal of the flexible tube without damage, offers good reusability, and eliminates the need for a traction net, making installation and removal simple and quick. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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 based on the structures shown in these drawings without creative effort.

[0017] Figure 1 A schematic diagram of a structure of an embodiment of the optical cable pre-termination assembly provided by this utility model;

[0018] Figure 2 for Figure 1 Exploded view of the pre-terminated assembly of the optical fiber cable;

[0019] Figure 3 for Figure 2 A magnified view of a section at point A in the middle;

[0020] Figure 4 for Figure 2 A magnified view of a section at point B in the middle;

[0021] Figure 5 for Figure 2 Exploded view of the first branch in the middle;

[0022] Figure 6 for Figure 2 A cross-sectional view of the first branch in the middle;

[0023] Figure 7 for Figure 5 A schematic diagram showing the hidden structure of the first branch in the middle;

[0024] Figure 8 for Figure 2 A cross-sectional view of the second branch in the middle.

[0025] Explanation of icon numbers:

[0026] 100. Optical cable pre-terminated assembly;

[0027] 1. First brancher; 11. Outer frame; 111. Protruding rib; 11a. First wire passage; 11b. First opening; 11c. Second opening; 12. Tail sleeve assembly; 121. Wire threading sleeve; 121a. First wire inlet; 1211. First boss; 122. First fixing sleeve; 123. Wire fastener; 1231. Moving clamp; 1232. Stationary clamp; 1233. Conical protrusion; 13. Wire splitting assembly; 131. Wire splitting cover; 131a. First wire splitting hole; 1311. Second boss; 132. Second fixing sleeve;

[0028] 2. Flexible tube;

[0029] 3. End seal; 3a. Traction hole;

[0030] 4. Branch sleeve;

[0031] 5. Second brancher; 5a. Second cable passage; 5b. Second cable inlet; 5c. Second branching hole;

[0032] 200. Optical fiber cable.

[0033] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0035] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0036] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0037] This utility model proposes an optical cable pre-termination assembly 100.

[0038] Please see Figure 1 , Figure 2 and Figure 5 In one embodiment of this utility model, the optical cable pre-termination assembly 100 includes a first brancher 1, a flexible tube 2, and an end seal 3. The first brancher 1 has a first cable passage 11a formed inside, and one end of the first brancher 1 is provided with a first inlet 121a communicating with the first cable passage 11a. The end of the first brancher 1 away from the first inlet 121a is provided with a plurality of first branch holes 131a communicating with the first cable passage 11a. The flexible tube 2 has a receiving space formed inside, and one end of the flexible tube 2 is sleeved on the outer wall of the first brancher 1 and screwed to the outer wall of the first brancher 1. The receiving space communicates with the first branch holes 131a. The end seal 3 is sealed and connected to the end of the flexible tube 2 away from the first brancher 1, and the end seal 3 is provided with a traction part.

[0039] In this embodiment, the optical cable pre-termination assembly 100 is used to disperse and protect the pre-stripped outer sheath of the optical fiber into multiple fiber bundles, so as to pass the end of the optical cable 200 segment from outdoors into indoors. It provides reusable flexible protection and a pulling interface for the exposed segment throughout the insertion and temporary parking process. The assembly itself is non-energized and passive, relying solely on its mechanical structure for protection and pulling, and is suitable for scenarios such as data centers, building optical distribution boxes, and base stations.

[0040] Specifically, please refer to Figure 5 and Figure 6 The first branch connector 1 has a cylindrical outer contour, and its interior forms a first cable passage 11a along its axis. One end of the first branch connector 1 has a circular first cable inlet 121a, and the other end has a matrix of first branch holes 131a distributed on the same end face. The outer wall of the first branch connector 1 has an external thread near the end of the first branch hole 131a. Optionally, the first branch connector 1 is injection molded from engineering plastic, with rounded edges on the branch holes and the cable inlet, and a triangular thread that directly engages with the internal metal thread at the end of the subsequent flexible tube 2. (See also...) Figure 1 and Figure 2 The flexible tube 2 is a long, straight, round tube that can be bent. Optionally, to balance protection and deformability, the innermost layer of the flexible tube 2 is a smooth, round tubular cavity, i.e., a space for accommodating the tube. The tube wall consists of two layers—an inner layer of thin-walled plastic tubing and an outer layer of tightly wrapped stainless steel spiral strip. The spiral strip has a rectangular cross-section, and adjacent loops interlock to form a bendable yet radially compression-resistant armor. Each end has a metal connector, and the inner wall of one metal connector has an internal thread with the same specification as the external thread on the first branch device 1. The plastic tubing and the metal connector are connected by a double connection of socket and epoxy resin potting. The connector end face is flat and is used to fit against the root of the external thread of the first branch device 1. The outer diameter of the metal connector is flush with the outer diameter of the armor of the flexible tube 2 to avoid step jamming during tube insertion. A sealing ring can be set inside or outside the metal connector. After tightening, axial compression is generated, and the sealing ring fills the microscopic gaps in the thread and end face to achieve dust and drip prevention. Optionally, the metal connector at the other end can be integrally formed with the end seal 3 or sealed by welding. The end cap 3 is shaped like a disc, with a flat lug extending from the center of its outer end face. A circular hole is formed in the center of the lug, creating a traction section for a rope or hook to pass through directly. Alternatively, the circular hole can be replaced with a hook-like structure for attachment to external tool ropes, etc. The end cap 3 is integrally machined or injection molded from plastic or metal.

[0041] In this embodiment, a flexible tube 2 is fitted over the first brancher 1 and screwed to the outer wall of the first brancher 1. Thus, the flexible tube 2 can be detached from the first brancher 1 by twisting the flexible tube 2 or the first brancher 1 without damaging the flexible tube 2. An end seal 3 is provided on the flexible tube 2 to ensure its inner cavity is partially sealed, preventing liquid or dust from entering and damaging the optical fiber and connector. The end seal 3 has a traction part, allowing the first brancher 1 and optical cable 200 to be moved without the need for an additional traction net. Combined with the screwed connection between the flexible tube 2 and the first brancher 1, even after the flexible protective tube is removed indoors, it can resist significant traction forces before or during indoor installation. In summary, the optical cable pre-termination assembly 100 of this embodiment facilitates the removal of the flexible tube 2 without damage, has good reusability, and allows for traction without the need for a traction net. The installation and removal steps are simple and quick.

[0042] In one embodiment of this utility model, the end seal 3 is detachably connected to the flexible tube 2.

[0043] To adapt to different working conditions, such as to accommodate different traction tools, an end seal 3 with a traction hole 3a or an end seal 3 with a hook-shaped traction part can be used to detachably connect the end seal 3 to the flexible tube 2. Optionally, the end seal 3 and the flexible tube 2 can be detachably connected by a snap-fit. The end seal 3 is in the shape of a round cap, with a ring of cantilevered claws around its outer circumference; the ends of the claws curve outwards, forming hook-shaped protrusions. A corresponding annular groove is formed on the inner wall of the flexible tube 2 connector; when the claws are pushed axially, the hook-shaped protrusions slide past the edge of the groove and spring into the groove, completing the axial locking; during disassembly, the outward-curving ends of the claws are pinched by hand to disengage the hook-shaped protrusions from the groove, and the end seal 3 is pulled out as a whole. There are at least two claws, evenly distributed around the circumference to ensure symmetrical force distribution. Alternatively, a pin can be used to achieve a detachable connection between the end seal 3 and the flexible tube 2. The end cap 3 has insertion holes on its outer periphery and the end of the flexible tube 2. A pin is passed through the end cap 3 and the flexible tube 2 in sequence, and then a locking element is passed through the hole at the end of the pin to lock it in place. To disassemble, the locking element is removed and the pin is pulled out. Preferably, the end cap 3 and the flexible tube 2 can be screwed together, as shown in the next embodiment. All the above examples can be disassembled and assembled by hand, and all parts can be reused, meeting the requirements of being detachable and reusable.

[0044] Further, please refer to Figure 4 In one embodiment of this utility model, the end seal 3 is screwed to the flexible tube 2.

[0045] In this embodiment, to facilitate the replacement of the end seal 3, an external thread can be provided on the inner circumference of the disc, corresponding to the external thread of the metal connector at the end of the flexible tube 2 furthest from the first branch 1. The end seal 3 is generally in the shape of a round cap, with an internal thread at the front end of the cap. The distal end of the flexible tube 2 is a rigid connector, with an external thread formed on the outer wall of the rigid connector; the internal thread of the end seal 3 can be screwed into this external thread, and a sealing ring is provided at the tail of the external thread, which is squeezed into the thread gap after being compressed, preventing loosening and achieving a seal.

[0046] This embodiment utilizes threads at both ends of the flexible tube 2, allowing for the removal of the flexible tube 2, the first branch 1, and the end cap 3 without damage, thus improving reusability. The threaded connection provides strong sealing and facilitates further sealing with sealing rings. Simultaneously, the threaded joint itself serves as the traction bearing path, eliminating the need for an additional traction net. After installation indoors, the flexible tube 2 can be removed without damage by rotating it in the opposite direction. The first branch 1 remains inside the cabinet and connects to the adapter. The flexible tube 2 and end cap 3 can be completely recycled and directly used in the next project, achieving reusability.

[0047] Further, please refer to Figure 2 Figure 3 and Figure 5 In one embodiment of the present invention, the optical cable pre-termination assembly 100 further includes a plurality of branch sleeves 4, each of which is connected to the first brancher 1, and the inner cavity of each branch sleeve 4 is connected to a first branch hole 131a.

[0048] In this embodiment, the optical cable pre-termination assembly 100 further includes two or more branch sleeves 4, which are used to extend and protect the optical fiber bundles branched from the first splitter 1. The branch sleeve 4 is a slender cylindrical tube with an outer diameter smaller than the flexible tube 2, and its length covers a portion of the bare fiber section from the first branch hole 131a to the optical fiber connector, leaving a portion of the bare fiber section for flexible connection. The sleeve is made of the same engineering plastic as the first splitter 1, and can be integrally injection molded with the first splitter 1, or it can be molded separately and then reassembled. When molded separately, one end of the branch sleeve 4 is inserted into the first branch hole 131a, and the branch sleeve 4 and the splitter can be inserted and removed by hand without tools, and all parts can be reused. By setting the branch sleeve 4, each optical fiber bundle obtains an independent protective cavity from the branch point, preventing mutual cross-friction and entanglement.

[0049] Further, please refer to Figure 2 and 8 In one embodiment of the present invention, the optical cable pre-termination assembly 100 further includes a second brancher 5; a second cable passage 5a is formed in the second brancher 5, one end of the second brancher 5 is provided with a second cable inlet 5b communicating with the second cable passage 5a, and the end of the second brancher 5 away from the second cable inlet 5b is provided with a plurality of second branch holes 5c communicating with the second cable passage 5a; the periphery of the second cable inlet 5b is connected to the end of the branch sleeve 4 away from the first brancher 1, and the second cable inlet 5b is connected to the inner cavity of the branch sleeve 4.

[0050] In this embodiment, a second brancher 5 is provided at the end of the branch sleeve 4 away from the first brancher 1. The second brancher 5 is used to split a strand or bundle of branched optical fibers into multiple individual optical fibers, so as to sort and maintain the orderly distribution of each optical fiber and prevent the optical fibers from being tangled together. A second cable passage 5a is formed inside the second brancher 5. One end of the second brancher 5 is provided with a second inlet 5b communicating with the second cable passage 5a. The end of the second brancher 5 away from the second inlet 5b is provided with multiple second split holes 5c communicating with the second cable passage 5a. The stranded branched optical fibers pass through the second cable passage 5a from the second inlet 5b. After being split into multiple individual optical fibers, each optical fiber exits from a corresponding second split hole 5c. Therefore, the diameter of the second split hole 5c can be set according to the outer diameter of the optical fiber. Optionally, the branch sleeve 4 and the second brancher 5 can be configured as an integral structure; preferably, the branch sleeve 4 and the second brancher 5 can be detachably connected, for example, the branch sleeve 4 can be inserted into the inner wall of the second inlet port 5b. In this case, the branch sleeve 4 and the inner wall of the second inlet port 5b can be configured to have an interference fit or a clearance fit, so as to ensure that the branch sleeve 4 will not easily fall off when inserted into the second inlet port 5b.

[0051] Further, please refer to Figure 2 In one embodiment of this utility model, the lengths of any two branch sleeves 4 are not equal among the plurality of branch sleeves 4.

[0052] In this embodiment, considering that each fiber in the branch fiber has a fiber optic connector at its ground end for connection to the indoor fiber optic adapter, and that the fiber optic connector occupies a relatively large space, the length of each branch sleeve 4 is increased sequentially in this embodiment. That is, the lengths of any two branch sleeves 4 are not equal, to avoid the fiber optic connectors at the ends of multiple branch fibers piling up together, which is inconvenient for accommodation and protection, and also inconvenient for sorting. In this embodiment, setting each branch sleeve to different lengths for staggered positioning reduces the radial dimension occupied by the fiber optic connectors of the branch fiber, achieving the effect of facilitating protection and sorting.

[0053] Further, please refer to Figure 5 and Figure 6 In one embodiment of the present invention, the first brancher 1 includes an outer frame 11, a tail sleeve assembly 12, and a wire splitting assembly 13. A first wire passage 11a is formed inside the outer frame 11, and a first opening 11b and a second opening 11c are formed at both ends of the wire passage. A first wire inlet 121a is formed on the tail sleeve assembly 12, and the tail sleeve assembly 12 is connected to the periphery of the first opening 11b. The first wire inlet 121a communicates with the first opening 11b. The wire splitting assembly 13 is provided with at least two first wire splitting holes 131a. The wire splitting assembly 13 covers the second opening 11c and is connected to the periphery of the second opening 11c. The second opening 11c communicates with the first wire splitting holes 131a.

[0054] In this embodiment, the first splitter 1 includes an outer frame 11, a tail sleeve assembly 12, a branching assembly 13, and at least two branch sleeves 4. The outer frame 11 is a cylindrical structure, and its function is to protect the stripped optical fibers in the optical cable 200. A cable passage is formed inside the outer frame 11, and the two ends of the outer frame 11 are open, namely, a first opening 11b and a second opening 11c are formed at the two ends of the outer frame 11, and the first opening 11b, the cable passage, and the second opening 11c are connected in sequence. The tail sleeve assembly 12 is connected to the periphery of the first opening 11b. The tail sleeve assembly 12 is cylindrical, and a first inlet 121a is formed inside the tail sleeve assembly 12 for the optical cable 200 to pass through. The size of the first inlet 121a is slightly larger than the outer diameter of the optical cable 200, which ensures that the optical cable 200 can pass through while preventing liquids or dust from entering the first splitter 1. The splitter assembly 13 is connected to and covers the periphery of the second opening 11c. The splitter assembly 13 has at least two spaced-apart first split holes 131a. When the first splitter 1 is assembled with the optical cable 200, the optical fiber is split into at least two strands, each strand passing through a corresponding first split hole 131a. The first split holes 131a can also bundle each strand to prevent it from becoming tangled. The splitter assembly 13 enables the branching of the optical cable 200, allowing each branch to transmit different signals, such as data, voice, and video, thus supporting multiple services simultaneously. Furthermore, when a branch malfunctions, it can be quickly isolated and troubleshooted to locate the faulty branch.

[0055] In this embodiment, when assembling the optical cable 200, the first brancher 1 first strips the protective layer of the optical cable 200 to expose the optical fiber portion inside. Then, the optical cable 200 is inserted into the tail sleeve assembly 12 from the inlet. The tail sleeve assembly 12 fixes the unstripped protective layer of the optical cable 200 and connects to the outer frame 11, thus achieving a connection and fixation between the first brancher 1 and the optical cable 200. The stripped optical fiber passes sequentially through the outer frame 11, the branch assembly 13, and the branch sleeve 4, and an optical fiber connector is installed at the end of the optical fiber. In this way, the optical cable 200 is connected to the outer frame 11 through the tail sleeve assembly 12. The outer frame 11 and the branch sleeve 4 protect the stripped optical fiber. The branch assembly 13 and the branch sleeve 4 can comb the optical fiber, and the branch sleeve 4 isolates the optical fibers of each branch, preventing them from tangling and becoming messy. This has the beneficial effects of reducing the risk of optical fiber damage and improving the convenience of combing the optical fiber.

[0056] Further, please refer to Figure 5 and 7In one embodiment of this utility model, the tail sleeve assembly 12 includes a threading sleeve 121, a first fixing sleeve 122, and a wire fastener 123. A first inlet 121a is formed inside the threading sleeve 121. A first boss 1211 extending circumferentially along the outside of the threading sleeve 121 is formed. A rib 111 extending circumferentially along the inner wall of the first opening 11b is formed. The threading sleeve 121 passes through the first opening 11b, and the first boss 1211 is located in the wire passage. The first fixing sleeve 122 is screwed to the outer wall of the threading sleeve 121. Located outside the first wire passage 11a, the protruding rib 111 is limited between the first boss 1211 and the first fixing sleeve 122; the wire fastener 123 includes a movable clamp 1231 and a stationary clamp 1232. The stationary clamp 1232 is located inside the first wire passage 11a and is fixedly connected to the wire sleeve 121. The movable clamp 1231 and the stationary clamp 1232 are detachably connected. A clamping space is formed between the movable clamp 1231 and the stationary clamp 1232. A tapered protrusion 1233 is provided on the side of the movable clamp 1231 and / or the stationary clamp 1232 facing the clamping space.

[0057] In this embodiment, the tail sleeve assembly 12 includes a threading sleeve 121, a first fixing sleeve 122, and a wire fastener 123. The threading sleeve 121 has a cylindrical structure with an inlet hole inside. The outer wall of the threading sleeve 121 has a first boss 1211 extending circumferentially along the threading sleeve 121. Optionally, the first boss 1211 can be configured as multiple bosses distributed circumferentially along the threading sleeve 121. Preferably, the first boss 1211 can be configured as a single ring of bosses extending circumferentially along the threading sleeve 121. Compared to configuring multiple bosses distributed circumferentially along the threading sleeve 121, this method makes it easier to achieve the sealing of the brancher. For example, a sealing structure or sealant can be applied between the boss and the outer frame 11. Furthermore, the first boss 1211 can also be configured as multiple rings of bosses spaced apart and extending circumferentially along the threading sleeve 121. In this way, sealing material can be filled between every two rings of bosses to improve the sealing performance of the brancher.

[0058] The first fixing sleeve 122 is detachably connected to the outer wall of the threading sleeve 121, and the protruding rib 111 is limited between the first boss 1211 and the first fixing sleeve 122. Optionally, the outer wall of the threading sleeve 121 can be provided with elastic claws. When the first fixing sleeve 122 is fitted onto the outer wall of the threading sleeve 121 along the direction from the threading sleeve 121 to the outer frame 11, the inner wall of the first fixing sleeve 122 presses against the elastic claws. After the first fixing sleeve 122 passes the elastic claws, the elastic claws rebound and limit the first fixing sleeve 122, preventing the first fixing sleeve 122 from leaving the outer wall of the threading sleeve 121 in the opposite direction. At this time, the protruding rib 111 is limited between the first boss 1211 and the first fixing sleeve 122. This method of setting elastic claws can realize the rapid assembly of the first fixing sleeve 122 and the threading sleeve 121. Preferably, the outer wall of the threaded sleeve 121 is provided with external threads, and the inner wall of the first fixing sleeve 122 is provided with internal threads that match the external threads. That is, the first fixing sleeve 122 and the threaded sleeve 121 are screwed together. By tightening the first fixing sleeve 122, the protruding rib 111 can be clamped between the first fixing sleeve 122 and the first boss 1211. At this time, the outer wall of the first fixing sleeve 122 is provided with multiple sets of parallel wall surfaces for clamping tools such as wrenches. This screwed connection method allows for tightness adjustment. After long-term use and loosening, the first fixing sleeve 122 can be tightened for reuse without replacing parts, thus improving the service life of the brancher. Furthermore, the screwed connection can provide greater compressive force, facilitating a sealed connection between the threaded sleeve 121 and the outer frame 11.

[0059] The cable threading sleeve 121 can be made of plastic material that can undergo slight deformation. The end of the cable threading sleeve 121 facing away from the outer frame 11 gradually contracts in the direction away from the outer frame 11 to form a conical surface. Correspondingly, a corresponding conical surface can be provided in the inner cavity of the end of the first fixing sleeve 122 facing away from the outer frame 11. That is, the inner cavity of the first fixing sleeve 122 gradually contracts in the direction away from the outer frame 11. When the first fixing sleeve 122 moves close to the outer frame 11, the two conical surfaces come into contact with each other, and the first fixing sleeve 122 squeezes the cable threading sleeve 121, causing the cable threading hole in the cable threading sleeve 121 to contract and fit tightly against the outer protective layer of the optical cable 200, thereby achieving a seal between the cable threading sleeve 121 and the optical cable 200.

[0060] Considering that the optical cable 200 may be subjected to axial tension during actual use of the splitter, the tail sleeve assembly 12 in this embodiment is provided with a cable fastener 123. The cable fastener 123 includes a movable clamp 1231 and a stationary clamp 1232. The movable clamp 1231 and the stationary clamp 1232 are located on the side of the cable pass-through sleeve 121 facing the cable passage. The stationary clamp 1232 is fixedly connected to the cable pass-through sleeve 121. Optionally, the cable pass-through sleeve 121 and the stationary clamp 1232 are integrally formed. The movable clamp 1231 and the stationary clamp 1232 are connected by screws, forming a clamping space between them. The unstripped portion of the optical cable 200 can be clamped in the clamping space. The clamping force can be adjusted by tightening the screws. In this way, the optical cable 200, together with the protective layer, can be fixed to the cable pass-through sleeve 121 and then connected to the outer frame 11. Therefore, it can withstand greater tension and prevent the optical fiber inside the outer frame 11 from being damaged by tension. Considering that the outer sheath of the optical cable 200 is relatively smooth, and that prolonged clamping can easily cause deformation of the optical cable 200, resulting in a gradual decrease in clamping force and potentially leading to the cable retainer 123 detaching from the optical cable 200, this embodiment provides a tapered protrusion 1233 on the side of the movable clamp 1231 and / or the stationary clamp 1232 facing the clamping space. The height of the tapered protrusion 1233 is flexibly designed according to the thickness of the outer sheath of the optical cable 200 to be clamped. That is, the tapered protrusion 1233 can increase the local deformation of the outer sheath of the optical cable 200 to form a depression, thereby increasing the mechanical clamping force between the cable retainer 123 and the optical cable 200, without puncturing the outer sheath of the optical cable 200 or damaging the internal optical fibers. This can prevent the first brancher 1 from slipping or loosening from the optical cable 200.

[0061] Please see Figure 5 In one embodiment of the present invention, the splitter assembly 13 includes a splitter cover 131 and a second fixing sleeve 132. The splitter cover 131 is provided with at least two first splitter holes 131a. The outer wall of the splitter cover 131 is provided with a second protrusion 1311 extending circumferentially along the splitter cover 131. The splitter cover 131 covers the second opening 11c and extends into the second opening 11c. The second protrusion 1311 abuts against the periphery of the second opening 11c. The second fixing sleeve 132 is sleeved on the outside of the splitter cover 131 and connected to the outer frame 11. The second protrusion 1311 is limited between the second fixing sleeve 132 and the outer periphery of the second opening 11c.

[0062] In this embodiment, the splitter assembly 13 includes a splitter cover 131 and a second fixing sleeve 132. The splitter cover 131 is a cylindrical structure, with a cover plate formed at one end to cover one side opening of the cylindrical structure. At least two first splitter holes 131a are formed on the cover plate. The outer wall of the splitter cover 131 is provided with a second protrusion 1311 extending circumferentially along the splitter cover 131. The cylindrical structure extends into the second opening 11c and is inserted into the inner wall of the second opening 11c. The size of the second protrusion 1311 is larger than that of the second opening 11c. The side wall of the second protrusion 1311 abuts against the outer periphery of the second opening 11c. In this way, the splitter cover 131 is covered by the second opening 11c. Multiple splitter covers 131 can be provided, and each splitter cover 131 corresponds to a splitter hole distribution pattern. In this way, the splitter cover 131 can be selected according to different fiber optic branching requirements, thereby improving the applicability of the splitter.

[0063] The second fixing sleeve 132 is fitted outside the splitter cover 131 and connected to the outer frame 11. The second boss 1311 is limited between the outer periphery of the second fixing sleeve 132 and the second opening 11c. That is, the second fixing sleeve 132 realizes the connection between the splitter cover 131 and the outer frame 11. Optionally, the second fixing sleeve 132 is fitted on the outer wall of the outer frame 11. The outer wall of the outer frame 11 can be provided with elastic claws. The inner wall of the second fixing sleeve 132 can be provided with a slot that matches the elastic claws. When the second fixing sleeve 132 is close to the outer frame 11, the inner wall of the second fixing sleeve 132 presses the elastic claws until the elastic claws enter the slots. The elastic claws rebound and limit the second fixing sleeve 132, preventing the second fixing sleeve 132 from leaving the outer wall of the outer frame 11 in the opposite direction. At this time, the splitter cover 131 is limited between the outer frame 11 and the second fixing sleeve 132. This method of setting elastic claws can realize the rapid assembly of the second fixing sleeve 132 and the outer frame 11. Preferably, the outer wall of the outer frame 11 is provided with external threads, and the inner wall of the second fixing sleeve 132 is provided with internal threads that match the external threads. That is, the second fixing sleeve 132 is screwed to the outer frame 11. By tightening the second fixing sleeve 132, the cable divider 131 can be clamped between the second fixing sleeve 132 and the outer frame 11. At this time, the outer wall of the second fixing sleeve 132 is provided with multiple sets of parallel wall surfaces for clamping tools such as wrenches. This screwed connection method allows for tightness adjustment. After long-term use, if it becomes loose, it can be reused by tightening the second fixing sleeve 132 without replacing parts, thus improving the service life of the brancher. Furthermore, the screwed connection can provide greater compressive force, facilitating airtightness between the cable threading sleeve 121 and the outer frame 11.

[0064] Please see Figure 4In one embodiment of this utility model, the traction part is a traction hole 3a or a traction hook. In order to adapt to different working conditions, such as to adapt to different traction tools, an end seal 3 with a traction hole 3a or an end seal 3 with a traction hook can be used. The accompanying drawings only show the traction part in the form of a traction hole 3a, and the traction part in the form of a traction hook is not shown.

[0065] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. An optical cable pre-termination assembly, characterized in that, The optical cable pre-termination assembly includes: A first brancher (1) has a first wire passage (11a) formed inside it. One end of the first brancher (1) is provided with a first wire inlet (121a) communicating with the first wire passage (11a). The end of the first brancher (1) away from the first wire inlet (121a) is provided with a plurality of first branch holes (131a) communicating with the first wire passage (11a). A flexible tube (2) having a receiving space inside, one end of which is sleeved on the outer wall of the first branch (1) and screwed to the outer wall of the first branch (1), the receiving space communicating with the first branch hole (131a); and An end seal (3) is sealed to the end of the flexible tube (2) away from the first branch (1), and the end seal (3) is provided with a traction part.

2. The optical cable pre-termination assembly as described in claim 1, characterized in that, The end cap (3) is detachably connected to the flexible tube (2).

3. The optical cable pre-termination assembly as described in claim 2, characterized in that, The end cap (3) is screwed to the flexible tube (2).

4. The optical cable pre-termination assembly as described in claim 1, characterized in that, The optical cable pre-termination assembly also includes multiple branch sleeves (4), each of which is connected to the first splitter (1), and the inner cavity of each branch sleeve (4) is connected to a first branch hole (131a).

5. The optical cable pre-termination assembly as described in claim 4, characterized in that, The optical cable pre-terminated assembly also includes a second brancher (5); The second brancher (5) has a second wire passage (5a) formed inside. One end of the second brancher (5) is provided with a second inlet (5b) communicating with the second wire passage (5a). The end of the second brancher (5) away from the second inlet (5b) is provided with a plurality of second branch holes (5c) communicating with the second wire passage (5a). The periphery of the second inlet (5b) is connected to the end of the branch sleeve (4) away from the first brancher (1), and the second inlet (5b) communicates with the inner cavity of the branch sleeve (4).

6. The optical cable pre-termination assembly as described in claim 4, characterized in that, Among the multiple branch sleeves (4), the lengths of any two branch sleeves (4) are not equal.

7. The optical cable pre-termination assembly as described in claim 1, characterized in that, The first brancher (1) includes: The outer frame (11) has a first wire passage (11a) formed inside it, and a first opening (11b) and a second opening (11c) are formed at both ends of the first wire passage (11a). A tail sleeve assembly (12), on which a first cable inlet (121a) is formed, the tail sleeve assembly (12) being connected to the periphery of the first opening (11b), the first cable inlet (121a) communicating with the first opening (11b); and A splitter assembly (13) is provided with at least two first splitter holes (131a). The splitter assembly (13) covers the second opening (11c) and is connected to the periphery of the second opening (11c). The second opening (11c) communicates with the first splitter hole (131a).

8. The optical cable pre-termination assembly as described in claim 7, characterized in that, The tail sleeve assembly (12) includes a threading sleeve (121), a first fixing sleeve (122), and a wire fastener (123), wherein the first wire inlet (121a) is formed inside the threading sleeve (121); The threading sleeve (121) has a first boss (1211) extending circumferentially along the outside of the threading sleeve (121), and the inner wall of the first opening (11b) has a rib (111) extending circumferentially along the first opening (11b). The threading sleeve (121) passes through the first opening (11b), and the first boss (1211) is located in the first wire passage (11a). The first fixing sleeve (122) is screwed to the outer wall of the threading sleeve (121) and located outside the first thread passage (11a), and the protruding rib (111) is limited between the first boss (1211) and the first fixing sleeve (122); The cable fastener (123) includes a movable clamp (1231) and a stationary clamp (1232). The stationary clamp (1232) is disposed in the cable passage and fixedly connected to the cable threading sleeve (121). The movable clamp (1231) and the stationary clamp (1232) are detachably connected. A clamping space is formed between the movable clamp (1231) and the stationary clamp (1232). A tapered protrusion (1233) is provided on the side of the movable clamp (1231) and / or the stationary clamp (1232) facing the clamping space.

9. The optical cable pre-termination assembly as described in claim 7, characterized in that, The splitter assembly (13) includes a splitter cover (131) and a second fixing sleeve (132). The splitter cover (131) is provided with at least two first splitter holes (131a). The outer wall of the splitter cover (131) is provided with a second boss (1311) extending circumferentially along the splitter cover (131). The dividing cover (131) covers the second opening (11c) and extends into the second opening (11c), and the second boss (1311) abuts against the periphery of the second opening (11c). The second fixing sleeve (132) is fitted over the wire divider cover (131) and connected to the outer frame (11). The second boss (1311) is located between the outer periphery of the second fixing sleeve (132) and the second opening (11c).

10. The optical cable pre-termination assembly as described in any one of claims 1 to 9, characterized in that, The traction part is a traction hole (3a) or a traction hook.

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