SC fiber optic connectors and fiber optic coupling devices

Abstract

This utility model discloses an SC fiber optic connector and fiber optic coupling device, relating to the field of fiber optic communication technology. It is used to connect to an optical cable and a fiber optic adapter with a cantilever latch. The connector includes an outer frame, a tail sleeve, and a connector body. One end of the outer frame has a first exposed hole, and the side wall of the outer frame has a second exposed hole with an unlocking surface. One end of the tail sleeve has a cable inlet hole, and the end of the tail sleeve away from the cable inlet hole is detachably connected to the end of the outer frame away from the first exposed hole. The tail sleeve and the outer frame form a sliding cavity. The connector body is slidably disposed in the sliding cavity. The connector body is used to connect to the optical cable and is partially exposed in the first exposed hole for insertion into the fiber optic adapter. The connector body also has a locking part exposed in the second exposed hole, which is used to lock into the cantilever latch. The tail sleeve is configured to slide along the direction from the first exposed hole to the cable inlet hole and drive the unlocking surface to press against the cantilever latch, thereby disengaging the locking part from the cantilever latch.

Description

Technical Field

[0001] This utility model relates to the field of optical fiber communication technology, and in particular to an SC optical fiber connector and an optical fiber coupling device. Background Technology

[0002] SC fiber optic connectors are one of the core components of fiber optic communication systems, used to connect with fiber optic adapters, and are widely used in data centers, FTTH (fiber to the home), and other scenarios. With increasing cabling density, traditional SC fiber optic connectors require the outer frame to be pinched and pulled away from the adapter to disengage the internal locking mechanism.

[0003] However, this structure has significant drawbacks in practical applications, especially in high-density cabling scenarios. The spacing between adjacent connectors is often less than 5mm, making it difficult to insert fingers and hold the outer frame stably, which can easily lead to slippage or accidental contact with adjacent connectors. Furthermore, in some scenarios, connectors need to be installed close to walls or cabinet sidewalls. The operable space on the side of the SC fiber optic connector's outer frame closest to the wall or cabinet sidewall is completely blocked, leaving only one side accessible. This results in uneven application of pulling force, making unlocking difficult and easily causing deformation of the outer frame and damage to the locking mechanism. Secondly, after long-term use, dust or wear can easily accumulate at the sliding joint between the outer frame and the main body, further increasing the pulling resistance. In situations with insufficient operable space, a high level of operational proficiency is required from maintenance personnel, significantly reducing maintenance efficiency. Utility Model Content

[0004] The main purpose of this invention is to propose an SC fiber optic connector that addresses the problem of inconvenient unlocking operations due to the small gap between the outer frames of two adjacent SC fiber optic connectors during high-density installation.

[0005] To achieve the above objectives, the present invention proposes an SC fiber optic connector for connecting to optical cables and fiber optic adapters. The fiber optic adapter includes a cantilever latch. The SC fiber optic connector comprises an outer frame, a tail sleeve, and a connector body. One end of the outer frame has a first exposed hole, and a second exposed hole is provided on the side wall of the outer frame. The side wall of the second exposed hole has an unlocking surface. One end of the tail sleeve has a cable inlet hole, and the end of the tail sleeve away from the cable inlet hole is detachably connected to the end of the outer frame away from the first exposed hole. The tail sleeve and the outer frame enclose a sliding cavity. The exposed hole, the second exposed hole, and the cable inlet hole are all connected to the sliding cavity; the connector body is slidably disposed in the sliding cavity, the connector body is used to connect to the optical cable and is partially exposed in the first exposed hole for insertion with the optical fiber adapter, the connector body is also provided with a snap-fit ​​part, the snap-fit ​​part is exposed in the second exposed hole, and the snap-fit ​​part is used to snap-fit ​​with the cantilever buckle; the tail sleeve is configured to slide along the direction from the first exposed hole to the cable inlet hole, and drive the unlocking surface to press the cantilever buckle, so that the snap-fit ​​part disengages from the cantilever buckle.

[0006] In one embodiment, the end of the tail sleeve near the cable inlet hole is provided with a shrinking portion, which gradually shrinks along the direction from the outer frame to the tail sleeve.

[0007] In one embodiment, the tail sleeve includes a hard rubber part and a soft rubber part connected in sequence. The hard rubber part is detachably connected to the outer frame, and the end of the soft rubber part away from the hard rubber part forms the cable inlet hole.

[0008] In one embodiment, the soft rubber portion includes an extension section and a hollow section, the extension section and the hollow section are integrally formed, and the extension section is fixed to the hard rubber portion; the hollow section is provided with a plurality of hollow holes spaced apart along the direction from the extension section to the hollow section.

[0009] In one embodiment, the soft rubber portion gradually shrinks along the direction from the hard rubber portion to the soft rubber portion.

[0010] In one embodiment, the tail sleeve is provided with a first connecting part, and the outer frame is provided with a second connecting part, wherein the first connecting part and the second connecting part are engaged.

[0011] In one embodiment, the first connecting part is a cantilever claw, the cantilever claw including an elastic cantilever and a locking protrusion provided at the free end of the elastic cantilever, the second connecting part is a locking hole; the end of the tail sleeve away from the cable inlet has an abutment surface, the abutment surface is provided with at least two cantilever claws, the two cantilever claws are respectively located on opposite sides of the abutment surface, and the locking protrusions of the two cantilever claws are arranged opposite to each other, and the inner wall of the outer frame is provided with the locking hole.

[0012] In one embodiment, the first connecting part is a cantilever claw, the cantilever claw including an elastic cantilever and a locking protrusion provided at the free end of the elastic cantilever; the second connecting part is a locking step; the end of the tail sleeve away from the cable inlet has an abutment surface, the abutment surface is provided with at least two cantilever claws, the two cantilever claws are respectively located on opposite sides of the abutment surface, and the locking protrusions of the two cantilever claws are arranged opposite to each other; the outer wall of the outer frame is provided with the locking step.

[0013] In one embodiment, the connector body includes an inner frame, a ferrule, and an optical cable fixing member. The inner frame is disposed within the sliding cavity at one end near the first exposed hole, and the outer wall of the inner frame is provided with the snap-fit ​​portion. The ferrule passes through the inner frame and is partially exposed in the first exposed hole for insertion with the optical fiber adapter. The optical cable fixing member is connected to the end of the ferrule away from the first exposed hole and is used for connection with the optical cable.

[0014] This utility model also proposes an optical fiber coupling device, which includes an optical fiber adapter as described in any of the above embodiments, and the optical fiber adapter is plugged into the SC optical fiber connector.

[0015] The SC fiber optic connector proposed in this utility model is used to connect to optical cables and fiber optic adapters. The fiber optic adapter has a cantilever latch. The SC fiber optic connector includes an outer frame, a tail sleeve, and a connector body. One end of the outer frame has a first exposed hole, and the side wall of the outer frame has a second exposed hole. The side wall of the second exposed hole has an unlocking surface. One end of the tail sleeve has a cable inlet hole. The end of the tail sleeve away from the cable inlet hole is detachably connected to the end of the outer frame away from the first exposed hole. The tail sleeve and the outer frame enclose a sliding cavity. The first exposed hole, the second exposed hole, and the cable inlet hole are all connected to the sliding cavity. The connector body is slidably disposed in the sliding cavity. The connector body is used to connect to the optical cable and is partially exposed in the first exposed hole for insertion into the fiber optic adapter. The connector body also has a locking part, which is exposed in the second exposed hole and is used to lock into the cantilever latch. The tail sleeve is configured to slide along the direction from the first exposed hole to the cable inlet hole, and drive the unlocking surface to press the cantilever latch, so that the locking part is disengaged from the cantilever latch. This invention detachably connects the tail sleeve to the outer frame, allowing the tail sleeve to transmit push and pull forces to the outer frame. When the tail sleeve is pulled, the outer frame moves relative to the fiber optic adapter, causing the unlocking ramp on the outer frame to slide relative to the elastic buckle inside the fiber optic adapter and press against the elastic buckle. This causes the elastic buckle to deform elastically and detach from the connector body, thus unlocking the connector. In this way, there is no need to insert fingers between two adjacent SC connectors to pinch the outer frame; unlocking can be achieved simply by pulling the tail sleeve. This solves the problem of inconvenient unlocking operations when the distance between the outer frames of two adjacent SC fiber optic connectors is small during high-density installation of existing SC fiber optic connectors. 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 an embodiment of the SC fiber optic connector provided by this utility model; Figure 2 for Figure 1 Exploded view of the SC fiber optic connector; Figure 3 for Figure 2 Schematic diagram of the structure of the inner and outer frames; Figure 4 for Figure 2 Schematic diagram of the middle tail sleeve; Figure 5 A schematic diagram of the structure of the fiber optic adapter provided by this utility model; Figure 6 A schematic diagram of an embodiment of the optical fiber coupling device provided by this utility model; Figure 7 for Figure 6 A magnified view of a section at point A in the middle; Figure 8 A schematic diagram of another embodiment of the SC fiber optic connector provided by this utility model; Figure 9 A schematic diagram of another embodiment of the optical fiber coupling device provided by this utility model.

[0018] Explanation of icon numbers: 100, SC fiber optic connector; 100a, sliding cavity; 1. Outer frame; 1a. First exposed hole; 1b. Second exposed hole; 1b1. Unlocking surface; 1c. Snap-fit ​​hole; 11. Snap-fit ​​step; 2. Tail sleeve; 21. Hard rubber part; 22. Soft rubber part; 22a. Cable inlet hole; 22b. Shrink section; 221. Extension section; 222. Hollowed-out section; 222a. Hollowed-out hole; 23. Cantilever claw; 231. Flexible cantilever; 232. Protrusion; 3. Connector body; 31. Inner frame; 311. Snap-fit ​​part; 32. Insert core; 33. Optical cable fixing component; 200. Fiber optic adapter; 210. Cantilever buckle; 211. Wing plate; 212. Buckle protrusion; 300. Fiber optic cable.

[0019] 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

[0020] 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.

[0021] 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.

[0022] 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.

[0023] This utility model proposes an SC fiber optic connector 100.

[0024] Please see Figure 2 , Figure 5 and Figure 7 In one embodiment of this utility model, the SC fiber optic connector 100 is used to connect with an optical cable 300 and an optical fiber adapter 200. The optical fiber adapter 200 has a cantilever buckle 210. The SC fiber optic connector 100 includes an outer frame 1, a tail sleeve 2, and a connector body 3. One end of the outer frame 1 has a first exposure hole 1a, and the side wall of the outer frame 1 has a second exposure hole 1b. The side wall of the second exposure hole 1b has an unlocking surface 1b1. One end of the tail sleeve 2 has a cable inlet hole 22a. The end of the tail sleeve 2 away from the cable inlet hole 22a is detachably connected to the end of the outer frame 1 away from the first exposure hole 1a. The tail sleeve 2 and the outer frame 1 enclose a sliding cavity 10. 0a, the first exposure hole 1a, the second exposure hole 1b, and the cable inlet hole 22a are all connected to the sliding cavity 100a; the connector body 3 is slidably disposed in the sliding cavity 100a, the connector body 3 is used to connect with the optical cable 300 and is partially exposed in the first exposure hole 1a for insertion with the optical fiber adapter 200, the connector body 3 is also provided with a snap-fit ​​part 311, the snap-fit ​​part 311 is exposed in the second exposure hole 1b, the snap-fit ​​part 311 is used to snap-fit ​​with the cantilever buckle 210; the tail sleeve 2 is configured to slide along the direction from the first exposure hole 1a to the cable inlet hole 22a, and drive the unlocking surface 1b1 to press the cantilever buckle 210, so that the snap-fit ​​part 311 is disengaged from the cantilever buckle 210.

[0025] In this embodiment, the SC fiber optic connector 100 is coaxially stacked from three parts: an outer frame 1, a tail sleeve 2, and a connector body 3. The connector body 3 contains a ferrule 32 with a pre-installed optical fiber for splicing with the optical fiber in the optical cable 300. The outer frame 1 and the connector body 3 have structures for mating with the fiber optic adapter 200 to allow for repeated insertion and removal. Specifically, the fiber optic adapter 200 has cantilever latches 210 on both sides of its inner cavity. The free end of the cantilever latches 210 has a protrusion to hook onto the latching portion 311 on the side wall of the connector body 3 in the mated state, achieving axial locking. When it is necessary to unlock the SC type fiber optic connector and fiber optic adapter 200, the tail sleeve 2 can be pulled first. Under the action of the pulling force, the outer frame 1 slides relative to the fiber optic adapter 200, the unlocking surface 1b1 slides relative to the cantilever buckle 210 and squeezes the cantilever buckle 210 to deform, so that the protrusion of the cantilever buckle 210 disengages from the snap-fit ​​part 311 on the side wall of the connector body 3. There is no need to pinch the outer frame 1 with your fingers, thus avoiding the narrow space of less than one finger between adjacent connectors when the high density is arranged, and also avoiding the embarrassment of not being able to reach the other side when the connector is against a wall on one side.

[0026] For example, such as Figures 1 to 3 The outer frame 1 is a rectangular thin-walled structure, which can be injection molded using flame-retardant PBT to ensure uniform wall thickness. The front opening of the outer frame 1 forms a first exposure hole 1a, allowing the insert 32 inside the connector body 3 to extend and mate with the sleeve inside the adapter. Symmetrically, second exposure holes 1b are formed on both side walls of the outer frame 1. The side walls of the second exposure holes 1b have grooves, and the side wall of these grooves near the first exposure hole 1a forms a wedge-shaped surface at an angle to the axial direction of the outer frame 1. The axial direction of the outer frame 1 is the direction from the first exposure hole 1a to the cable inlet hole 22a, and the wedge-shaped surface is the unlocking surface 1b1. Figures 5 to 7 The cantilever buckle 210 has its extension direction parallel to the axis of the outer frame 1. A buckle protrusion 212 is formed at the free end of the cantilever buckle 210. Wing plates 211 are formed on both sides of the buckle protrusion 212. The buckle protrusion 212 engages with the snap-fit ​​portion 311 on the side wall of the connector body 3. The wing plates 211 are slidably connected to the unlocking surface 1b1. When the unlocking surface 1b1 slides relative to the wing plates 211, it can gradually push the buckle protrusion 212 away from the connector body 3 to achieve unlocking. Figures 2 to 4The tail sleeve 2 has a sleeve-like structure, with an open front end and a tapered rear end forming a cable inlet hole 22a. The inner contour dimension of the opening at the front end of the tail sleeve 2 can be slightly larger than the outer contour dimension of the outer frame 1, allowing the tail sleeve 2 to fit around the outer circumference of the outer frame 1, or the outer contour dimension of the front end of the tail sleeve 2 to be the same as the outer contour dimension of the outer frame 1. In this case, the outer surface of the tail sleeve 2 and the outer surface of the outer frame 1 can transition smoothly, reducing steps and distortion on the outer surface and reducing the risk of scratches and jamming. The tail sleeve 2 and the outer frame 1 can be detachably connected by setting internal and external threads, snap-fit ​​structures, and screws. The front end of the connector body 3 is press-fitted with a ceramic ferrule 32, and the rear end is a welding protection mechanism for protecting the welding, such as a welding pipe and a protective sleeve.

[0027] Since the unlocking power of the SC fiber optic connector 100 in this embodiment is directly provided by the tail sleeve 2, no additional compression spring is needed between the outer frame 1 and the main body, reducing the number of parts. The detachable connection between the tail sleeve 2 and the outer frame 1 ensures the transmission of tension and allows for quick disassembly and assembly, facilitating the replacement of internal parts during maintenance without the need for complete scrapping. In this embodiment, by pulling the tail sleeve 2 to slide the outer frame 1, and then using the unlocking surface 1b1 to open the cantilever buckle 210 through a continuous mechanical path, the traditional unlocking action of having to hold the outer frame 1 from both sides is transformed into a simple action of pulling the tail sleeve 2 from one side. This solves the problems of SC connectors being difficult to unlock, prone to slippage, and easily damaged by bias in high-density, wall-mounted, and other confined spaces, while also taking into account maintainability and reliability.

[0028] Further, please refer to Figure 9 In one embodiment of the present invention, a shrinkable portion 22b is provided at one end of the tail sleeve 2 near the cable inlet 22a, and the shrinkable portion 22b is gradually shrinking along the direction from the outer frame 1 to the tail sleeve 2.

[0029] In this embodiment, the contraction portion 22b is a complete conical segment of the outer peripheral wall of the tail sleeve 2, integrally formed with the tail sleeve 2. The contraction portion 22b has a large-diameter end and a small-diameter end, and the outer diameter of the contraction portion 22b gradually decreases from the large-diameter end to the small-diameter end, forming a tapered surface with a gradually narrowing outer contour. When multiple SC fiber optic connectors 100 are arranged side by side, a wedge-shaped gap is formed between adjacent tail sleeves 2 due to the reduction in the outer diameter of the contraction portion 22b. The maximum diameter of the wedge-shaped gap is d2, and the distance between two adjacent outer frames 1 is d1. d2 is greater than d1 and greater than the thickness of a finger, providing sufficient space for the finger to be inserted. Maintenance personnel can directly insert their fingertips into the wedge-shaped gap, pinch the outer wall of the contraction portion 22b and pull it backward. The pulling force is transmitted to the outer frame 1 through the engagement of the annular groove on the inner wall of the tail sleeve 2 and the barb of the outer frame 1. The outer frame 1 moves backward, and the unlocking surface 1b1 pushes open the cantilever buckle 210, completing the unlocking. This embodiment increases the space for finger unlocking operations by providing a retractable portion 22b without changing the arrangement density of the SC fiber optic connectors 100, thereby further improving the convenience of unlocking operations.

[0030] Further, please refer to Figure 4 In one embodiment of this utility model, the tail sleeve 2 includes a hard rubber part 21 and a soft rubber part 22 connected in sequence, and the hard rubber part 21 is detachably connected to the outer frame 1. The end of the soft rubber part 22 away from the hard rubber part 21 forms a cable inlet hole 22a.

[0031] In this embodiment, the hard plastic part 21 and the soft plastic part 22 can be bonded together by two-color injection molding. The hard plastic part 21 has a connecting groove on its outer periphery, and the soft plastic part 22 can partially fill the connecting groove to enhance the bonding strength between the soft plastic part 22 and the hard plastic part 21. The hard plastic part 21 and the rear end of the outer frame 1 can be connected by threads, clips, screws, etc., to form a detachable connection that can resist push and pull. The soft plastic part 22 and the hard plastic part 21 cannot be separated after injection molding and cooling. The hard plastic part 21 can be made of a material that becomes rigid after injection molding and cooling, such as PBT (polybutylene terephthalate) or PC (polycarbonate); the soft plastic part 22 can be made of a material that becomes flexible after injection molding and cooling, such as TPU (thermoplastic polyurethane elastomer rubber) or TPE (thermoplastic elastomer). The rigid rubber part 21 provides the rigidity required for connection with the outer frame 1, so that the barb and the ring groove of the tail sleeve 2 are not easily deformed when frequently pulled; the soft rubber part 22 allows the tail sleeve 2 to bend appropriately, dispersing bending stress and avoiding damage to the optical fiber by bending.

[0032] Further, please refer to Figure 4 In one embodiment of the present invention, the soft rubber part 22 includes an extension section 221 and a hollow section 222. The extension section 221 and the hollow section 222 are integrally formed structures, and the extension section 221 is fixed to the hard rubber part 21. The hollow section 222 is provided with a plurality of hollow holes 222a distributed at intervals along the direction from the extension section 221 to the hollow section 222.

[0033] In this embodiment, the soft rubber part 22 is integrally formed from an extension section 221 and a hollow section 222. The extension section 221 is made of the same material as the hollow section 222, such as TPU or TPE. Multiple hollow holes 222a are distributed axially around the outer periphery of the hollow section 222, and thin ribs are formed between adjacent hollow holes 222a. The hollow section 222 has low stiffness and is more prone to bending deformation. When subjected to the gravity of the optical cable 300, the deformation joints corresponding to each hollow hole 222a are squeezed and close to close, absorbing bending strain. The extension section 221, due to its large wall thickness and lack of holes, has a lower deformation capacity than the hollow section 222 and remains in a nearly straight or slightly bent state. Thus, the stiffness of the hard rubber part 21 gradually decreases from the hollow section 222 to the hollow section 222. The optical fiber and optical cable 300 gradually bend under their own weight, avoiding excessive local bending of the optical fiber and providing greater load-bearing capacity. This allows the soft rubber part 22 to be suspended a greater distance away from the optical fiber adapter 200 for unlocking operations.

[0034] Please see Figure 6 In one embodiment of the present invention, the soft rubber portion 22 gradually shrinks along the direction from the hard rubber portion 21 to the soft rubber portion 22.

[0035] In this embodiment, the soft rubber portion 22 gradually contracts along the direction from the hard rubber portion 21 to the soft rubber portion 22, forming a continuous conical surface. The outer diameter of the contracted section starts from the point where it connects with the hard rubber portion 21 and is uniformly thinned to the end face of the cable inlet 22a. This tapering structure causes the stiffness of the soft rubber portion 22 to continuously decrease along the axial direction: the outer diameter is largest near the hard rubber portion 21, with a high bending modulus, which can stably transmit the tension of the tail sleeve 2; the outer diameter is smallest away from the hard rubber portion 21, with a low bending modulus, which can easily produce a smooth bend along the direction of the optical cable 300, avoiding stress concentration. The contracted outer contour also expands the wedge-shaped gap at the rear end of the adjacent tail sleeve 2, allowing fingers to slide in and grip along the conical surface, improving the ease of operation in high-density environments.

[0036] Please see Figure 3 , Figure 4 and Figure 8 In one embodiment of this utility model, the tail sleeve 2 is provided with a first connecting part, and the outer frame 1 is provided with a second connecting part, and the first connecting part and the second connecting part are engaged.

[0037] In this embodiment, a first connecting part is formed on the outer periphery of the tail sleeve 2, and a second connecting part is formed on the rear end of the outer frame 1. The first connecting part and the second connecting part are engaged, so that the tail sleeve 2 and the outer frame 1 are axially locked during the pushing and pulling process and can be quickly disassembled. For example, the first connecting part can be a rib that surrounds the inner wall of the front port of the tail sleeve 2. The cross-section of the rib is a right-angled triangle, and its straight surface faces the cable inlet hole 22a. The second connecting part is a barb protruding from the outer periphery of the rear end of the outer frame 1. The thickness of the root of the barb is less than the wall thickness of the outer frame 1, and the top of the barb is provided with an guide slope. During assembly, the barb slides along the guide slope over the annular rib, and then the straight surface of the rib abuts against the straight surface of the barb, forming a tensile and push-resistant engagement. During disassembly, a sharp tool is inserted through the notch of the outer frame 1, and the barb is gently pressed inward to pull the tail sleeve 2 away from the outer frame 1. This snap-fit ​​structure relies solely on elastic deformation for locking, eliminating the need for metal pins or threads. It has fewer parts, lower cost, and can be easily assembled and disassembled from one side even with high-density arrangement. For example, the first connecting part can be a protrusion surrounding the inner wall of the front port of the tail sleeve 2, with an arc-shaped cross-section. The second connecting part is an arc-shaped groove on the outer wall of the outer frame 1. The inner contour dimension of the tail sleeve 2 is larger than the outer contour dimension of the outer frame 1. After the protrusion is engaged in the arc-shaped groove, it can be disassembled from the outer frame 1 after being subjected to a pull-out force exceeding the tensile threshold.

[0038] Please see Figure 3 and Figure 4In one embodiment of this utility model, the first connecting part is a cantilever claw 23, which includes an elastic cantilever 231 and a locking protrusion 232 located at the free end of the elastic cantilever 231. The second connecting part is a locking hole 1c. The end of the tail sleeve 2 away from the cable inlet hole 22a has an abutment surface, and the abutment surface is provided with at least two cantilever claws 23. The two cantilever claws 23 are respectively located on opposite sides of the abutment surface, and the locking protrusions 232 of the two cantilever claws 23 are arranged opposite to each other. The inner wall of the outer frame 1 is provided with a locking hole 1c.

[0039] In this embodiment, the abutting surface of the tail sleeve 2 is formed with a first connecting part, and the inner wall of the outer frame 1 is correspondingly formed with a second connecting part. The first connecting part and the second connecting part are engaged, so that the tail sleeve 2 and the outer frame 1 are axially locked and detachable when pushed and pulled. The first connecting part is a cantilever claw 23, which consists of an elastic cantilever 231 and a locking protrusion 232 provided at the free end of the elastic cantilever 231. The second connecting part is a locking hole 1c. The abutting surface is located at the end of the tail sleeve 2 away from the cable inlet hole 22a. At least two cantilever claws 23 are respectively arranged on opposite sides of the abutting surface, and the two locking protrusions 232 face outwards. During assembly, the cantilever claw 23 is inserted into the inner cavity of the outer frame 1 along with the tail sleeve 2. The elastic cantilever 231 first elastically retracts inward, and after the locking protrusion 232 aligns with the locking hole 1c on the inner wall of the outer frame 1, it springs back, and the locking protrusion 232 falls into the locking hole 1c, forming an inverted locking engagement. During disassembly, a sharp object is used to press the locking protrusion 232 inward through the small hole on the outside of the outer frame 1, and the elastic cantilever 231 retracts inward again, allowing the tail sleeve 2 to be pulled away from the outer frame 1. The cantilever claw 23 is completely concealed inside the outer frame 1, without interfering with external parts, avoiding being hooked or deformed during handling or wiring, and has a flat appearance, improving the overall aesthetics and reliability of the machine.

[0040] Please see Figure 8 In one embodiment of this utility model, the first connecting part is a cantilever claw 23, which includes an elastic cantilever 231 and a locking protrusion 232 provided at the free end of the elastic cantilever 231. The second connecting part is a locking step 11. The end of the tail sleeve 2 away from the cable inlet hole 22a has an abutment surface. The outer wall of the outer frame 1 is provided with a locking step 11. The abutment surface is provided with at least two cantilever claws 23. The two cantilever claws 23 are respectively located on opposite sides of the abutment surface, and the locking protrusions 232 of the two cantilever claws 23 are arranged opposite to each other.

[0041] In this embodiment, the abutting surface of the tail sleeve 2 is formed into a first connecting part, and the outer wall of the outer frame 1 directly utilizes the existing anti-slip step as a second connecting part. The first connecting part and the second connecting part are snapped together to achieve rapid assembly of the tail sleeve 2 and the existing outer frame 1. The first connecting part is a cantilever claw 23, which consists of an elastic cantilever 231 and a locking protrusion 232 located at the free end of the elastic cantilever 231. The abutting surface is located at the end of the tail sleeve 2 away from the cable inlet hole 22a, and at least two cantilever claws 23 are respectively arranged on opposite sides of the abutting surface, with the two locking protrusions 232 facing inwards. During assembly, the cantilever claw 23 slides into the outer wall of the outer frame 1, and the elastic cantilever 231 first elastically opens outward. After the locking protrusion 232 passes the anti-slip step of the outer frame 1, it springs back, and the locking protrusion 232 snaps inward against the shoulder of the anti-slip step, forming an inverted locking engagement. During disassembly, the elastic cantilever 231 is pushed outward with a fingernail or a thin piece, and the locking protrusion 232 disengages from the anti-slip step, allowing the tail sleeve 2 to be pulled away from the outer frame 1. The anti-slip step was originally used for finger anti-slip, but in this embodiment, it is reused as a locking step 11, eliminating the need for additional structures on the outer frame 1. The tail sleeve 2 can be directly added to the existing connector, achieving an upgrade in unlocking function, strong compatibility, and reduced costs.

[0042] Further, please refer to Figure 2 In one embodiment of the present invention, the connector body 3 includes an inner frame 31, a ferrule 32, and an optical cable fixing member 33. The inner frame 31 is disposed in the sliding cavity 100a at one end near the first exposed hole 1a, and the outer wall of the inner frame 31 is provided with a snap-fit ​​part 311. The ferrule 32 passes through the inner frame 31 and is partially exposed in the first exposed hole 1a and is used to be plugged into the optical fiber adapter 200. The optical cable fixing member 33 is connected to the end of the ferrule 32 away from the first exposed hole 1a and is used to be connected to the optical cable 300.

[0043] In this embodiment, the inner frame 31, the ferrule 32, and the optical cable fastener 33 are arranged coaxially. The inner frame 31 is located at the end of the sliding cavity 100a near the first exposed hole 1a. The outer wall of the inner frame 31 is provided with a snap-fit ​​part 311 for locking with the cantilever buckle 210 inside the adapter. The snap-fit ​​part 311 is a square rib, or it can be a right-angled triangular rib, with the straight surface of the right-angled triangular rib facing away from the first exposed hole 1a. The ferrule 32 passes through the center of the inner frame 31, with its front end extending out of the first exposed hole 1a and docking with the optical fiber adapter 200, and its rear end docking with the optical cable fastener 33. The end of the optical cable fastener 33 away from the first exposed hole 1a is for the optical cable 300 to pass through. The optical cable fastener can be a fusion splice fastener or a cold splice fastener. When a fusion splice fastener is used, a heat shrink tubing can also be reserved inside the fusion splice fastener. The fusion splice fastener is used to support and protect the fusion splice point. The ferrule 32 can be made of zirconia ceramic and glued to the inner wall of the inner frame 31. Alternatively, a boss can be provided on the outer wall of the ferrule 32 and a limiting boss can be provided inside the inner frame 31 to prevent the ferrule 32 from protruding out of the inner frame 31. A pre-installed optical fiber is provided inside the ferrule 32, and the splice point between the pre-installed optical fiber and the optical fiber in the optical cable 300 is located within the splice fixing member. The splice fixing member is tubular and can be threaded at one end, allowing it to be connected to the ferrule 32 via the thread. The other end of the splice fixing member can be screwed with a locking sleeve or fitted with a ring clamp to connect to the optical cable 300. Thus, when the optical cable 300 is under tension, the tension is transmitted to the ferrule 32 through the splice fixing member, preventing the splice point from breaking under tension. When a cold-joint fastener is used, the cold-joint fastener can be integrated with the ferrule 32. The end of the cold-joint fastener away from the ferrule 32 can be provided with an openable clamping part to clamp the optical cable 300. After the optical fiber stripped from the optical cable 300 is cut to a suitable length, it can be inserted into the cold-joint fastener and then into the ferrule 32.

[0044] This utility model also proposes an optical fiber coupling device, which includes an optical fiber adapter 200 and an SC optical fiber connector 100 as described in any of the above embodiments. The optical fiber adapter 200 is plugged into the SC optical fiber connector 100. Since this optical fiber coupling device adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated further here. For example, Figure 5 As shown, the fiber optic adapter 200 has a socket at each end, and each socket has two oppositely arranged cantilever buckles 210. The fiber optic adapter 200 also has a sleeve that connects the two sockets. The sleeve is for inserting the ferrule 32. When the SC fiber optic connector 100 is inserted into both sockets, the ferrules 32 of the two fiber optic connectors are aligned and the optical path is connected.

[0045] 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 SC fiber optic connector for connecting to an optical cable (300) and an optical fiber adapter (200), characterized in that, The fiber optic adapter (200) has a cantilever latch (210), and the SC fiber optic connector includes: The outer frame (1) has a first exposure hole (1a) at one end and a second exposure hole (1b) on the side wall of the outer frame (1). The side wall of the second exposure hole (1b) has an unlocking surface (1b1). Tail sleeve (2), one end of which is provided with a cable inlet hole (22a), the end of the tail sleeve (2) away from the cable inlet hole (22a) is detachably connected to the end of the outer frame (1) away from the first exposed hole (1a), the tail sleeve (2) and the outer frame (1) enclose to form a sliding cavity (100a), the first exposed hole (1a), the second exposed hole (1b) and the cable inlet hole (22a) are all connected to the sliding cavity (100a); The connector body (3) is slidably disposed in the sliding cavity (100a). The connector body (3) is used to connect with the optical cable (300) and is partially exposed in the first exposure hole (1a) for insertion with the optical fiber adapter (200). The connector body (3) is also provided with a snap-fit ​​part (311), which is exposed in the second exposure hole (1b) and is used to snap-fit ​​with the cantilever buckle (210). The tail sleeve (2) is configured to slide along the direction from the first exposed hole (1a) to the cable inlet hole (22a) and cause the unlocking surface (1b1) to press the cantilever buckle (210) so that the locking part (311) disengages from the cantilever buckle (210).

2. The SC fiber optic connector as described in claim 1, characterized in that, The tail sleeve (2) has a shrinkable part (22b) at one end near the cable inlet (22a), and the shrinkable part (22b) gradually shrinks along the direction from the outer frame (1) to the tail sleeve (2).

3. The SC fiber optic connector as described in claim 1, characterized in that, The tail sleeve (2) includes a hard rubber part (21) and a soft rubber part (22) connected in sequence. The hard rubber part (21) is detachably connected to the outer frame (1). The end of the soft rubber part (22) away from the hard rubber part (21) forms the cable inlet hole (22a).

4. The SC fiber optic connector as described in claim 3, characterized in that, The soft rubber part (22) includes an extension section (221) and a hollow section (222). The extension section (221) and the hollow section (222) are integrally formed. The extension section (221) is fixed to the hard rubber part (21). The hollow section (222) is provided with a plurality of hollow holes (222a) spaced apart along the direction from the extension section (221) to the hollow section (222).

5. The SC fiber optic connector as described in claim 3, characterized in that, The soft rubber portion (22) gradually shrinks along the direction from the hard rubber portion (21) to the soft rubber portion (22).

6. The SC fiber optic connector as described in claim 1, characterized in that, The tail sleeve (2) is provided with a first connecting part, and the outer frame (1) is provided with a second connecting part, and the first connecting part and the second connecting part are engaged.

7. The SC fiber optic connector as described in claim 6, characterized in that, The first connecting part is a cantilever claw (23), which includes an elastic cantilever (231) and a locking protrusion (232) provided at the free end of the elastic cantilever (231). The second connecting part is a locking hole (1c). The tail sleeve (2) has an abutting surface at one end away from the cable inlet (22a). The abutting surface is provided with at least two cantilever claws (23). The two cantilever claws (23) are located on opposite sides of the abutting surface, and the protrusions (232) of the two cantilever claws (23) are arranged opposite to each other. The inner wall of the outer frame (1) is provided with the snap-fit ​​hole (1c).

8. The SC fiber optic connector as described in claim 6, characterized in that, The first connecting part is a cantilever claw (23), which includes an elastic cantilever (231) and a locking protrusion (232) provided at the free end of the elastic cantilever (231). The second connecting part is a locking step (11). The tail sleeve (2) has an abutting surface at one end away from the cable inlet (22a). The abutting surface is provided with at least two cantilever claws (23). The two cantilever claws (23) are located on opposite sides of the abutting surface, and the protrusions (232) of the two cantilever claws (23) are arranged opposite to each other. The outer wall of the outer frame (1) is provided with the snap-fit ​​step (11).

9. The SC fiber optic connector as described in claim 1, characterized in that, The connector body (3) includes an inner frame (31), a ferrule (32), and an optical cable fixing member (33). The inner frame (31) is located in the sliding cavity (100a) at one end near the first exposed hole (1a). The outer wall of the inner frame (31) is provided with the snap-fit ​​part (311). The ferrule (32) passes through the inner frame (31) and is partially exposed in the first exposed hole (1a) and is used to be plugged into the optical fiber adapter (200). The optical cable fixing member (33) is connected to the end of the ferrule (32) away from the first exposed hole (1a) and is used to be connected to the optical cable (300).

10. An optical fiber coupling device, characterized in that, The fiber optic coupling device includes a fiber optic adapter (200) as described in any one of claims 1 to 9, wherein the fiber optic adapter (200) is plugged into the SC fiber optic connector.

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