Fiber coupling device, fiber connector and fiber adapter

Abstract

The utility model discloses a kind of optical fiber coupling device, optical fiber connector and optical fiber adapter, it is related to optical fiber communication technical field, optical fiber coupling device includes optical fiber adapter and optical fiber connector, cavity is formed in optical fiber adapter, two sockets are formed on optical fiber adapter, two sockets are located the opposite two outer side walls of optical fiber adapter and with cavity communication, the inner wall of socket is formed with clamping protrusion and button;Optical fiber connector includes shell and ferrule, shell has insertion part, insertion part is inserted in a socket, ferrule is worn in insertion part, the outer side wall of shell is formed with first cantilever buckle, first cantilever buckle has the first fixed end and the first free end of mutual connection, first fixed end is connected with shell, first free end is set away from shell, and clamping portion is formed on first free end;First free end extends to a socket, and clamping portion is clamped with clamping protrusion, button is oppositely arranged with the end of first cantilever buckle away from shell.

Description

Technical Field

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

[0002] With the rapid development of optical fiber communication technology, the requirements for the density and reliability of optical fiber coupling devices are constantly increasing. Especially with the widespread application of CPO (Co-packaged Optics) technology, higher demands are placed on the size, ease of operation, and structural complexity of optical fiber coupling devices. For example, in mid-plane connections, existing optical fiber coupling devices, such as MPO (Multi-fiber Push-On) connectors and adapters, while offering advantages such as high wiring density, stable and reliable performance, and ease of cabling management, have complex structures, numerous parts, and large sizes, making them unsuitable for confined spaces. Therefore, designing an optical fiber coupling device that is easy to operate, simple in structure, easy to assemble and disassemble, and effectively miniaturized has become a pressing technical problem in this field. Utility Model Content

[0003] The main purpose of this invention is to propose an optical fiber coupling device, an optical fiber connector, and an optical fiber adapter, which aims to solve the problems of existing optical fiber coupling devices having complex structures, numerous parts, and large size, making them unsuitable for use in confined spaces.

[0004] To achieve the above objectives, the fiber optic coupling device proposed in this utility model includes a fiber optic adapter and a fiber optic connector. The fiber optic adapter has a cavity and two sockets located on opposite outer walls of the adapter and communicating with the cavity. The inner walls of the sockets have snap-fit ​​protrusions and buttons. The fiber optic connector includes a housing and a ferrule. The housing has an insertion portion inserted into one of the sockets, and the ferrule passes through the insertion portion. The outer wall of the housing has a first cantilever latch with a first fixed end and a first free end connected to each other. The first fixed end is connected to the housing, and the first free end is located away from the housing, with a snap-fit ​​portion formed on it. The first free end extends into one of the sockets, and the snap-fit ​​portion snaps into the snap-fit ​​protrusion within the socket. The button is positioned opposite the first free end, and a portion of the button is exposed on the outer wall of the fiber optic adapter. The button is configured to push the first free end when pressed, causing the snap-fit ​​portion to disengage from the snap-fit ​​protrusion.

[0005] In one embodiment, the button is a cantilever structure, the button has a second fixed end and a second free end connected to each other, the outer wall of the fiber optic adapter has a clearance hole communicating with the socket, the second fixed end is connected to the inner wall of the clearance hole, and the second free end is disposed opposite to the first free end.

[0006] In one embodiment, a pressing protrusion is provided on the side of the second free end facing away from the socket.

[0007] In one embodiment, the snap-fit ​​part is a wing plate, and a wing plate is provided on each of the opposite sides of the first free end. The two wing plates and the first cantilever buckle are arranged in a T-shape. Two snap-fit ​​protrusions are provided at intervals on one side wall of the socket. The two snap-fit ​​protrusions are located on both sides of the first cantilever buckle, and each snap-fit ​​protrusion snaps with a wing plate.

[0008] In one embodiment, the snap-fit ​​protrusion has a snap-fit ​​surface and a guide surface. The snap-fit ​​surface faces the cavity and is disposed perpendicular to the inner wall of the socket. The guide surface faces away from the cavity and is disposed at an angle to the inner wall of the socket. The snap-fit ​​surface snaps into the snap-fit ​​portion. And / or, the outer wall of the housing is provided with a clearance groove disposed facing the first free end.

[0009] In one embodiment, the housing includes a front shell, a rear shell, a spring, and a tail sleeve that are detachably connected in sequence. The ends of the front shell and the rear shell away from the tail sleeve form the insertion portion. The outer wall of the end of the rear shell away from the tail sleeve is provided with the first cantilever buckle. The front shell, the rear shell, and the tail sleeve enclose a receiving cavity. The end of the front shell away from the rear shell is provided with a mounting hole communicating with the receiving cavity. The insert is inserted into the mounting hole. A limiting boss is formed on the insert. The limiting boss is located on the side of the mounting hole facing the receiving cavity. The spring is disposed in the receiving cavity. The two ends of the spring abut against the insert and the rear shell, respectively. The side wall of the front shell is also provided with an observation hole communicating with the mounting hole. The end of the tail sleeve away from the rear shell is provided with a wire passage hole.

[0010] In one embodiment, the front shell is provided with a second cantilever buckle at one end near the rear shell. The second cantilever buckle has a second fixed end and a second free end connected to each other. The second fixed end is connected to the front shell, and the second free end is provided with a connecting protrusion. The inner cavity of the rear shell is provided with a snap-fit ​​hole, and the second free end extends into the inner cavity of the rear shell so that the connecting protrusion snaps into the inner wall of the snap-fit ​​hole.

[0011] In one embodiment, a guide rail is provided at one end of the housing opposite to the first cantilever buckle, and a guide slot is provided at one end of the socket opposite to the snap-fit ​​protrusion. Both the guide rail and the guide slot extend along the direction from the fiber optic connector to the fiber optic adapter, and the guide rail is inserted into the inner wall of the guide slot. Alternatively, a foolproof protrusion is provided on one side wall of the housing adjacent to the first cantilever buckle, and a foolproof slot is provided on one side wall of the socket adjacent to the snap-fit ​​protrusion. Both the foolproof protrusion and the foolproof slot extend along the direction from the fiber optic connector to the fiber optic adapter, and the foolproof protrusion is inserted into the inner wall of the foolproof slot.

[0012] This utility model also proposes an optical fiber adapter for connecting to an optical fiber connector. The optical fiber adapter has a cavity formed inside and two sockets formed on it. The two sockets are located on opposite outer side walls of the optical fiber adapter and communicate with the cavity. The inner wall of each socket has a snap-fit ​​protrusion and a button. The snap-fit ​​protrusion is used to snap into the snap-fit ​​part of the optical fiber connector. The button is exposed on the outer wall of the optical fiber adapter and is configured to push the first cantilever latch of the optical fiber connector when pressed, so that the snap-fit ​​part disengages from the snap-fit ​​protrusion.

[0013] This utility model also proposes an optical fiber connector for connecting with an optical fiber adapter. The optical fiber connector includes a housing and a ferrule. The housing has an insertion portion, and the ferrule passes through the insertion portion. A first cantilever buckle is formed on the outer side wall of the housing. The first cantilever buckle has a first fixed end and a first free end connected to each other. The first fixed end is connected to the housing, and the first free end is disposed away from the housing. A snap-fit ​​portion is formed on the first free end. The insertion portion is used to insert into the inner wall of the connector of the optical fiber adapter, and the snap-fit ​​portion is used to snap into the snap-fit ​​protrusion of the optical fiber adapter.

[0014] The fiber optic coupling device proposed in this utility model includes a fiber optic adapter and a fiber optic connector. The fiber optic adapter has a cavity and two sockets located on opposite outer walls of the adapter and communicating with the cavity. The inner walls of the sockets have snap-fit ​​protrusions and buttons. The fiber optic connector includes a housing and a ferrule. The housing has an insertion portion inserted into a socket, and the ferrule passes through the insertion portion. The outer wall of the housing has a first cantilever latch with a first fixed end and a first free end connected to each other. The first fixed end is connected to the housing, and the first free end is located away from the housing, with a snap-fit ​​portion formed on it. The first free end extends into a socket, and the snap-fit ​​portion snaps with the snap-fit ​​protrusion within the socket. The button is positioned opposite the end of the first cantilever latch away from the housing, and the button portion is exposed on the outer wall of the fiber optic adapter. The button is configured to, when pressed, push the end of the first cantilever latch away from the housing to disengage the snap-fit ​​portion from the snap-fit ​​protrusion. This invention features a first cantilever latch on the housing of the fiber optic connector, with the first free end of the latch pointing towards the fiber optic adapter. A locking protrusion inside the fiber optic adapter's socket locks the locking portion on the first free end, allowing the fiber optic connector to quickly lock with the adapter. Compared to traditional methods with locking cantilevers on both sides and the free ends of the cantilevers extending away from the adapter, the first cantilever latch of this fiber optic coupling device occupies less space, significantly reducing the size of the fiber optic connector and adapter. Furthermore, its simple structure and fewer parts make it suitable for use in confined spaces, greatly increasing the deployment density of fiber optic coupling devices. Attached Figure Description

[0015] 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.

[0016] Figure 1 A schematic diagram of an embodiment of the optical fiber coupling device provided by this utility model; Figure 2 for Figure 1 Exploded view of the optical fiber coupling device; Figure 3 for Figure 1 Cross-sectional view of the optical fiber coupling device; Figure 4 for Figure 2 A schematic diagram of the structure of the fiber optic adapter; Figure 5 for Figure 4A partial cross-sectional view of the fiber optic adapter; Figure 6 for Figure 2 A schematic diagram of the structure of a fiber optic connector; Figure 7 for Figure 6 Exploded view of a fiber optic connector; Figure 8 for Figure 7 Schematic diagram of the middle and posterior shell structure; Figure 9 for Figure 7 Schematic diagram of the structure of the middle and front shell; Figure 10 for Figure 4 Assembly diagram of the fiber optic adapter.

[0017] Explanation of icon numbers: 100. Fiber optic coupling device; 1. Fiber optic adapter; 1a. Cavity; 1b. Socket; 1c. Recessed hole; 1d. Guide slot; 1f. Foolproof slot; 11. Snap-fit ​​protrusion; 111. Snap-fit ​​surface; 112. Guide surface; 12. Button; 121. Second fixed end; 122. Second free end; 123. Press protrusion; 2. Fiber optic connector; 21. Housing; 21a. Receiving cavity; 211. Front housing; 211a. Mounting hole; 211b. Observation hole; 211c. Alignment groove; 2111. Second cantilever latch; 2112. Connecting protrusion; 212. Rear housing; 212a. Snap-fit ​​hole; 213. Tail sleeve; 213a. Cable passage hole; 214. Guide rail; 215. Foolproof protrusion; 22. Ferrule; 221. Limiting boss; 23. Spring; 24. First cantilever latch; 241. First fixed end; 242. First free end; 2421. Wing plate; 3. Dust cap; 4. Install the spring; 41. Fixing part; 42. Elastic part.

[0018] 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

[0019] 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.

[0020] 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.

[0021] 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.

[0022] This utility model proposes an optical fiber coupling device 100.

[0023] Please see Figures 1 to 3 In one embodiment of this utility model, the optical fiber coupling device 100 includes an optical fiber adapter 1 and an optical fiber connector 2. A cavity 1a is formed within the optical fiber adapter 1, and two sockets 1b are formed on the optical fiber adapter 1. The two sockets 1b are located on opposite outer sidewalls of the optical fiber adapter 1 and communicate with the cavity 1a. (See also...) Figure 5 The inner wall of the socket 1b has a snap-fit ​​protrusion 11 and a button 12; the fiber optic connector 2 includes a housing 21 and a ferrule 22. The housing 21 has an insertion part that is inserted into a socket 1b, and the ferrule 22 passes through the insertion part. Please refer to [link to relevant documentation]. Figure 6 The outer wall of the housing 21 has a first cantilever buckle 24. The first cantilever buckle 24 has a first fixed end 241 and a first free end 242 connected to each other. The first fixed end 241 is connected to the housing 21, and the first free end 242 is disposed away from the housing 21. A snap-fit ​​portion is formed on the first free end 242. The first free end 242 extends into a socket 1b, and the snap-fit ​​portion snaps into a snap-fit ​​protrusion 11 in the socket 1b. Please refer to [link to relevant documentation]. Figure 3 Button 12 is positioned opposite to the first free end 242, and part of button 12 is exposed on the outer wall of fiber optic adapter 1. Button 12 is configured to push the first free end 242 when pressed, so that the snap-fit ​​portion disengages from the snap-fit ​​protrusion 11.

[0024] In this embodiment, a cavity 1a is formed within the fiber optic adapter 1, extending continuously within the adapter to accommodate the insertion part and the ferrule 22. Both ends of the cavity 1a have connecting ports 1b, which guide the insertion part and provide a channel for insertion into the cavity 1a. Fiber optic connectors 2 can be inserted into either port 1b of the cavity 1a. The two ferrules 22 of the fiber optic connectors 2 inserted at both ends are mated together to achieve optical path conduction. Note that the attached figures only show the case where one end of the fiber optic adapter 1 has the fiber optic connector 2 inserted; the other end is empty, and a dust cap 3 is provided to prevent dust from entering. The two ports 1b are located on opposite outer walls of the fiber optic adapter 1, ensuring that the fiber optic connector 2 can only be inserted from opposite directions, forming a 180° mating layout. This ensures a straight optical path and avoids losses caused by bending. A snap-fit ​​protrusion 11 is formed on the inner wall of the port 1b, facing the central axis of the port 1b, for mechanical engagement with the snap-fit ​​part on the side wall of the fiber optic connector 2. Button 12 and latching protrusion 11 are located within the same socket 1b and partially exposed on the outer wall of fiber optic adapter 1. The exposed portion allows a finger to press button 12 from the outside. Button 12 is positioned opposite the end of the first cantilever latch 24 furthest from the housing 21, so that the pressed button 12 can accurately abut against and push the first free end 242. Button 12 can be a cylindrical structure of a circular or square shape, or it can be a lever or cantilever, etc. This embodiment does not limit this. The above features together constitute a technical means of integrating locking and unlocking functions within a single-sided socket 1b, saving the space occupied by the cantilever on the fiber optic connector 2 side of a traditional fiber optic coupling device 100, such as the space occupied by the cantilever on both sides of a traditional MPO connector and adapter.

[0025] The fiber optic connector 2 carries the ferrule 22 into the adapter cavity 1a and achieves quick locking with the adapter at the insertion end. The fiber optic connector 2 has a housing 21 and a ferrule 22. The housing 21 has an insertion part, the outer contour of which forms a surface-to-surface guiding fit with the inner contour of the socket 1b, ensuring that the MT end face of the ferrule 22 is aligned with the corresponding MT end face inside the adapter. The ferrule 22 passes through the insertion part, with its front end protruding from the end face of the insertion part, for mating with the ferrule 22 of another fiber optic connector 2 inside the adapter. A first cantilever buckle 24 is provided on the outer side of the housing 21. The first fixed end 241 of the first cantilever buckle 24 is integrally connected to the side wall of the housing 21, and the connection position is located at the root of the insertion part, so that the first cantilever buckle 24 extends forward in the insertion direction. The first free end 242 of the first cantilever buckle 24 is away from the housing 21 and extends into the socket 1b. The snap-fit ​​part formed thereon abuts and limits the snap-fit ​​protrusion 11 in the socket 1b on the side facing away from the fiber optic connector 2, so as to realize the mechanical snap-fit ​​between the first cantilever buckle 24 and the snap-fit ​​protrusion 11, that is, to achieve locking in the insertion direction. The snap-fit ​​part can be in the form of a block protrusion or a plate protrusion, etc., and this embodiment is not limited to this.

[0026] During insertion, the connector insertion part slides along the inner wall of the socket 1b, and the first cantilever latch 24 is pre-pressed inward by the latching protrusion 11. After the latching part passes the latching protrusion 11, the cantilever rebounds, and the latching part and the side of the latching protrusion 11 facing away from the fiber optic connector 2 are latched and locked. During removal, pressing the button 12 with a finger causes the first free end 242 to deflect towards the housing 21, disengaging the latching part from the latching protrusion 11, and the connector can be pulled out in the reversible insertion direction. It should be noted that the first cantilever latch 24 points towards the adapter cavity 1a, making the first cantilever latch 24 parallel to the side wall of the socket 1b, rather than the outward-facing form of the traditional MPO connector. This allows the locking mechanism to be fully housed within the thickness of the socket 1b, achieving the technical objective of setting up a locking mechanism without increasing the width of the connector. Consequently, the width of the adapter is not increased. The entire fiber optic coupling device 100 is small in size, simple in structure, and has few parts, making it suitable for use in confined spaces. This greatly improves the deployment density of the fiber optic coupling device 100 and makes it more suitable for high-density assembly scenarios.

[0027] It should be noted that when the fiber optic adapter 1 in this embodiment is mounted on a board, a spring 4 can be installed on the outer sleeve of the fiber optic adapter 1, such as... Figure 10 As shown, the mounting spring 4 includes a frame-shaped fixing part 41 and a sheet-shaped elastic part 42 that is raised away from the outer wall of the fiber optic adapter 1. The outer wall of the fiber optic adapter 1 has a boss. When the elastic part 42 is raised, a limiting space is formed between the elastic part 42 and the boss, which can firmly hold the mounting panel within the mounting space. When the elastic part 42 is pressed down, the elastic part 42 adheres to the surface of the fiber optic adapter 1, at which point the fiber optic adapter 1 along with the mounting spring 4 can be removed. It should be noted that... Figure 10 The provided example is only one embodiment of a four-unit installation. In addition, single or any number of fiber optic adapters 1 can be installed together, and it is not limited to the four-unit installation method.

[0028] Further, please refer to Figure 4 In one embodiment of the present invention, the button 12 is a cantilever structure. The button 12 has a second fixed end 121 and a second free end 122 that are connected to each other. The outer wall of the fiber optic adapter 1 is formed with a clearance hole 1c that communicates with the socket 1b. The second fixed end 121 is connected to the inner wall of the clearance hole 1c. The second free end 122 is disposed opposite to the first free end 242.

[0029] In this embodiment, given the width of the fiber optic adapter 1, a low-friction, low-occupancy button 12 solution is provided, avoiding the through holes and sealing rings required by traditional columnar buttons 12, thereby reducing the stacking size in the thickness direction.

[0030] Specifically, button 12 is a cantilever structure, having a second fixed end 121 and a second free end 122 connected together to form an integral cantilever. The second fixed end 121 is connected to the inner wall of the clearance hole 1c on the outer wall of the adapter, allowing the cantilever to extend along the wall thickness direction. The second free end 122 extends outward and is positioned opposite to the first free end 242 of the first cantilever buckle 24. The clearance hole 1c is formed on the outer wall of the fiber optic adapter 1 and communicates with the socket 1b, providing deformation space for the second cantilever while ensuring that the second free end 122 can be displaced into the socket 1b when pressed. In this embodiment, button 12 eliminates the need for additional parts such as the reset spring 23 without increasing the width of the adapter. That is, while maintaining the advantages of fewer parts and simpler structure, it further reduces the size occupied by button 12 on the fiber optic adapter 1, solving the problems of large size and easy jamming of traditional button 12 or unlocking mechanism.

[0031] Further, please refer to Figure 4 In one embodiment of the present invention, a pressing protrusion 123 is provided on the side of the second free end 122 facing away from the insertion port 1b.

[0032] Considering that traditional unlocking button 12 structures are limited by space, operators often find it difficult to press the button 12 accurately with their fingers, or the pressing stroke is insufficient to unlock the device. In this embodiment, a pressing protrusion 123 is provided on the side of the second free end 122 of the button 12 facing away from the socket 1b, that is, a pressing protrusion 123 is provided on the side of the second free end 122 facing outward from the housing 21. In scenarios where space is limited or fingers cannot accurately reach the second free end 122, the pressing protrusion 123 can extend the stroke to meet the unlocking stroke, and makes it easier for the operator to press accurately, achieving unlocking with one hand without the need for tools such as screwdrivers. The shape of the protrusion can be spherical, rectangular, etc., and this embodiment does not limit this.

[0033] Further, please refer to Figure 5 , Figure 6 and Figure 8 In one embodiment of this utility model, the snap-fit ​​part is a wing plate 2421, and a wing plate 2421 is provided on each of the opposite sides of the free end. The two wing plates 2421 and the first cantilever buckle 24 are arranged in a T-shape. Two snap-fit ​​protrusions 11 are provided at intervals on one side wall of the insertion port 1b. The two snap-fit ​​protrusions 11 are located on both sides of the first cantilever buckle 24, and each snap-fit ​​protrusion 11 snaps with a wing plate 2421.

[0034] In this embodiment, the snap-fit ​​part adopts a wing plate 2421. The wing plate 2421 has a plate-like extended structure and is integrally formed with the first free end 242. Two wing plates 2421 are arranged opposite each other on the first free end 242, respectively located on both sides of the first free end 242. The two wing plates 2421 and the body of the first cantilever buckle 24 together form a T-shaped planar layout, wherein the vertical side of the T-shape is the body of the first cantilever buckle 24, and the two horizontal ends of the T-shape are the two wing plates 2421. The two snap-fit ​​protrusions 11 are arranged on the same sidewall of the insertion port 1b and are spaced apart. The two snap-fit ​​protrusions 11 are respectively located on both sides of the first cantilever buckle 24, corresponding one-to-one with the two wing plates 2421. Each snap-fit ​​protrusion 11 and the corresponding wing plate 2421 form a mechanical snap-fit ​​in the insertion axis, restricting the reverse displacement of the connector. In this way, symmetrical locking points on both sides can be provided to disperse the pull-out force, avoid stress concentration on one side of the locking point, and improve the tensile strength of the first cantilever buckle 24. The snap-fit ​​protrusion 11 and the corresponding wing plate 2421 form a double-sided locking, which bears the pull-out load, so that the adapter and connector are subjected to uniform force when under tension, reducing the risk of unilateral prying crack.

[0035] Further, please refer to Figure 5 and Figure 6 In one embodiment of the present invention, the snap-fit ​​protrusion 11 has a snap-fit ​​surface 111 and a guide surface 112. The snap-fit ​​surface 111 faces the cavity 1a and is perpendicular to the inner wall of the socket 1b. The guide surface 112 faces away from the cavity 1a and is set at an angle to the inner wall of the socket 1b. The snap-fit ​​surface 111 snaps into the snap-fit ​​part. And / or, the outer wall of the housing 21 is provided with a relief groove 211c facing the first free end 242.

[0036] To ensure low insertion force and reliable locking within a limited insertion stroke and under limited finger pushing force, while preventing damage to the locking part or the first cantilever latch 24 during repeated insertion and removal, in this embodiment, the locking protrusion 11 is provided with a locking surface 111 and a guide surface 112. Specifically, the locking surface 111 faces the cavity 1a and is perpendicular to the inner wall of the insertion port 1b, used to form an axial shape lock with the locking part and bear the main pull-out load; the guide surface 112 faces away from the cavity 1a and is set at an angle to the inner wall of the insertion port 1b, forming a slope or arc surface in the insertion direction, used to decompose the insertion force into a component force that forces the cantilever to elastically deform inward, reducing the peak insertion force. The locking surface 111 and the guide surface 112 form an asymmetrical profile on the locking protrusion 11. During insertion, sliding along the guide surface 112 is effortless, and during reverse pull-out, the vertical locking surface 111 provides high resistance, achieving a smooth insertion and reliable one-way locking effect.

[0037] Please see Figure 6 and Figure 7In one embodiment of this utility model, the housing 21 includes a front housing 211, a rear housing 212, a spring 23, and a tail sleeve 213 that are detachably connected in sequence. The ends of the front housing 211 and the rear housing 212 away from the tail sleeve 213 form insertion portions. The outer wall of the end of the rear housing 212 away from the tail sleeve 213 is provided with a first cantilever buckle 24. The front housing 211, the rear housing 212, and the tail sleeve 213 enclose a receiving cavity 21a. The end of the front housing 211 away from the rear housing 212 is provided with a connection to the receiving cavity 21a. The mounting hole 211a is connected, and the insert 22 is inserted into the mounting hole 211a. A limiting boss 221 is formed on the insert 22, which is limited to the side of the mounting hole 211a facing the receiving cavity 21a. The spring 23 is provided in the receiving cavity 21a, and the two ends of the spring 23 abut against the insert 22 and the rear shell 212 respectively. The side wall of the front shell 211 is also provided with an observation hole 211b that communicates with the mounting hole 211a. The end of the tail sleeve 213 away from the rear shell 212 is provided with a wire passage hole 213a.

[0038] In this embodiment, the housing 21 includes a front housing 211, a rear housing 212, and a tail sleeve 213 connected sequentially along the pull-out direction. That is, the housing 21 is divided into segments with different functions along the pull-out direction, which respectively undertake the functions of aligning the ferrule 22, locking it, and clamping the optical cable, making it easy to disassemble and maintain.

[0039] Specifically, the ends of the front shell 211 and the rear shell 212 furthest from the tail sleeve 213 form part of the insertion portion for insertion into any of the sockets 1b of the fiber optic adapter 1. The end of the front shell 211 furthest from the rear shell 212 is provided with a mounting hole 211a for accommodating the ferrule 22. The side wall of the front shell 211 is provided with an observation hole 211b communicating with the mounting hole 211a, for visually confirming from the outside whether the ferrule 22 is in place or the fiber arrangement within the ferrule 22. The outer side wall of the rear shell 212 near the end of the front shell 211 is provided with a first cantilever latch 24 to lock the fiber optic adapter 1. The rear shell 212 and the front shell 211 are detachably connected. Optionally, the rear shell 212 can be detachably connected to the front shell 211 via a pin or latch, etc., but this embodiment does not limit this. The end of the rear shell 212 furthest from the front shell 211 is detachably connected to the tail sleeve 213. Optionally, the outer wall of the end of the rear shell 212 furthest from the front shell 211 is provided with an annular groove, and the inner cavity of the end of the tail sleeve 213 near the rear shell 212 is provided with an annular protrusion, which engages with the inner wall of the annular groove. The tail sleeve 213 and the annular protrusion are an integral structure and are made of deformable soft silicone or rubber. Alternatively, the rear shell 212 and the tail sleeve 213 can be detachably connected by means of screws or other methods; this embodiment does not limit this. The end of the tail sleeve 213 furthest from the rear shell 212 is provided with a cable hole 213a for the optical cable to pass through. The front shell 211, rear shell 212, and tail sleeve 213 enclose and form a receiving cavity 21a. The front shell 211 forms the front section of the receiving cavity 21a, the rear shell 212 forms the middle section of the receiving cavity 21a, and the tail sleeve 213 forms the rear section of the receiving cavity 21a. The insert 22 is partially located within the front section of the receiving cavity 21a. The insert 22 has an upper limit boss 221. The diameter of the mounting hole 211a is smaller than that of the receiving cavity 21a, so the upper limit boss 221 abuts against the periphery of the mounting hole 211a facing the receiving cavity 21a. The two ends of the spring 23 abut against the ferrule 22 and the back cover 212 respectively. It should be noted that the inner wall of the back cover 212 is provided with a step for the spring 23 to abut against. When the two fiber optic connectors 2 are inserted into the two sockets 1b of the same fiber optic adapter 1 for docking, the spring 23 provides a thrust through elasticity to ensure that the two ferrules 22 can be docked firmly and stably. The elastic deformation of the spring 23 allows the ferrule 22 to move slightly along the axial direction so that the two ferrules 22 can automatically adapt.

[0040] During assembly, first insert the ferrule 22 from back to front into the mounting hole 211a of the front housing 211 until the limiting boss 221 is blocked by the periphery of the mounting hole 211a facing the receiving cavity 21a. Then, insert the spring 23 into the tail of the ferrule 22 and abut against the limiting boss 221. Next, fasten the rear housing 212 to the front housing 211. At this time, the other end of the spring 23 abuts against the step inside the rear housing 212. Finally, fasten the tail sleeve 213 to the rear housing 212 to complete the assembly of the fiber optic connector 2. The disassembly sequence is the reverse. All steps do not require special tools, meeting the maintenance needs of replacing the ferrule 22 or spring 23 on site.

[0041] Further, please refer to Figures 7 to 9 In one embodiment of the present invention, a second cantilever buckle 2111 is provided at one end of the front shell 211 near the rear shell 212. The second cantilever buckle 2111 has a second fixed end 121 and a second free end 122 connected to each other. The second fixed end 121 is connected to the front shell 211, and the second free end 122 is provided with a connecting protrusion 2112. The inner cavity of the rear shell 212 is provided with a snap-fit ​​hole 212a, and the second free end 122 extends into the inner cavity of the rear shell 212 so that the connecting protrusion 2112 snaps into the inner wall of the snap-fit ​​hole 212a.

[0042] To achieve a detachable connection between the front shell 211 and the rear shell 212 without increasing the size of the fiber optic connector 2, and to allow for easy assembly and disassembly of the front shell 211 and the rear shell 212 without the aid of tools, in this embodiment, a second cantilever buckle 2111 is provided at one end of the front shell 211 near the rear shell 212. The second cantilever buckle 2111 has a second fixed end 121 and a second free end 122. The second fixed end 121 is integrally connected to the body of the front shell 211, and the second free end 122 extends into the inner cavity of the rear shell 212. A connecting protrusion 2112 is provided on the outer side of the second free end 122. The connecting protrusion 2112 is used to engage with the inner wall of the snap-fit ​​hole 212a on the inner wall of the rear shell 212 to form an axial limit. The snap-fit ​​hole 212a is in the inner wall of the rear shell 212 and extends through the side wall of the rear shell 212, so that the connecting protrusion 2112 is partially exposed, making it easy for external fingers to press the second free end 122 to unlock.

[0043] Further, please refer to Figure 4 and Figure 6In one embodiment of this utility model, a guide rail 214 is provided at one end of the housing 21 opposite to the first cantilever buckle 24, and a guide slot 1d is provided at one end of the socket 1b opposite to the snap-fit ​​protrusion 11. Both the guide rail 214 and the guide slot 1d extend along the direction from the fiber optic connector 2 to the fiber optic adapter 1, and the guide rail 214 is inserted into the inner wall of the guide slot 1d; and / or, a foolproof protrusion 215 is provided on one side wall of the housing 21 adjacent to the first cantilever buckle 24, and a foolproof slot 1f is provided on one side wall of the socket 1b adjacent to the snap-fit ​​protrusion 11. Both the foolproof protrusion 215 and the foolproof slot 1f extend along the direction from the fiber optic connector 2 to the fiber optic adapter 1, and the foolproof protrusion 215 is inserted into the inner wall of the foolproof slot 1f.

[0044] In this embodiment, in blind mating or high-density side-by-side scenarios, the guide rail 214 is inserted into the guide slot 1d, providing a unique and correct sliding path for the connector to enter the adapter, avoiding collisions on the MT end face due to angular deviations during insertion, and ensuring that the first cantilever latch 24 and the latching protrusion 11 are precisely aligned at the insertion endpoint. The guide rail 214 is located at the end of the housing 21 opposite to the first cantilever latch 24, and the guide slot 1d is located at the end of the socket 1b opposite to the latching protrusion 11. Both the guide rail 214 and the guide slot 1d extend along the direction from the fiber optic connector 2 to the fiber optic adapter 1, forming a straight slide parallel to the insertion and removal directions. The outer wall of the guide rail 214 and the inner wall of the guide slot 1d have complementary shapes, forming a surface-to-surface sliding pair during insertion, restricting the pitch and tilt freedom of the connector within the socket 1b.

[0045] The anti-misalignment protrusion 215 and the anti-misalignment slot 1f engage to prevent the connector from being inserted in a 180° reverse or misaligned manner, thus avoiding polarity reversal of the fiber optic array. The anti-misalignment protrusion 215 is located on the side wall of the housing 21 adjacent to the first cantilever latch 24, and the anti-misalignment slot 1f is located on the side wall of the socket 1b adjacent to the snap-fit ​​protrusion 11. Both the anti-misalignment protrusion 215 and the anti-misalignment slot 1f extend along the direction from the fiber optic connector 2 to the fiber optic adapter 1, forming a straight slide parallel to the insertion axis. The outer wall of the anti-misalignment protrusion 215 and the inner wall of the anti-misalignment slot 1f have a unique shape correspondence; if reversed or misaligned, the protrusion will conflict with the slot contour and cannot be inserted.

[0046] This utility model also proposes an optical fiber adapter 1 for connecting with an optical fiber connector 2. The optical fiber adapter 1 has a cavity 1a and two sockets 1b. The two sockets 1b are located on opposite outer walls of the optical fiber adapter 1 and communicate with the cavity 1a. The inner wall of the sockets 1b has a snap-fit ​​protrusion 11 and a button 12. The snap-fit ​​protrusion 11 is used to snap with the snap-fit ​​part of the optical fiber connector 2. The button 12 is partially exposed on the outer wall of the optical fiber adapter 1. The button 12 is configured to push the first cantilever latch 24 of the optical fiber connector 2 when pressed, so that the snap-fit ​​part is disengaged from the snap-fit ​​protrusion 11.

[0047] In this embodiment, a cavity 1a is formed within the fiber optic adapter 1, extending continuously within the adapter to accommodate the insertion part and the ferrule 22. Both ends of the cavity 1a have connecting ports 1b, which guide the insertion part and provide a channel for insertion into the cavity 1a. Fiber optic connectors 2 can be inserted into either port 1b of the cavity 1a. The two ferrules 22 of the fiber optic connectors 2 inserted at both ends are mated together to achieve optical path conduction. Note that the attached figures only show the case where one end of the fiber optic adapter 1 has the fiber optic connector 2 inserted; the other end is empty, and a dust cap 3 is provided to prevent dust from entering. The two ports 1b are located on opposite outer walls of the fiber optic adapter 1, ensuring that the fiber optic connector 2 can only be inserted from opposite directions, forming a 180° mating layout. This ensures a straight optical path and avoids losses caused by bending. A snap-fit ​​protrusion 11 is formed on the inner wall of the port 1b, facing the central axis of the port 1b, for mechanical engagement with the snap-fit ​​part on the side wall of the fiber optic connector 2. Button 12 and latching protrusion 11 are located within the same socket 1b and partially exposed on the outer wall of fiber optic adapter 1. The exposed portion allows a finger to press button 12 from the outside. Button 12 is positioned opposite the end of the first cantilever latch 24 furthest from the housing 21, so that the pressed button 12 can accurately abut against and push the first free end 242. Button 12 can be a cylindrical structure of a circular or square shape, or it can be a lever or cantilever, etc. This embodiment does not limit this. The above features together constitute a technical means of integrating locking and unlocking functions within a single-sided socket 1b, saving the space occupied by the cantilever on the fiber optic connector 2 side of the traditional fiber optic coupling device 100, such as the space occupied by the cantilever on both sides of the traditional MPO connector and adapter. The fiber optic adapter 1 of this embodiment can also refer to the part described in the embodiment of the fiber optic coupling device 100 above, and therefore has at least all the beneficial effects brought by the technical solution of the above embodiment, which will not be repeated here.

[0048] This utility model also proposes an optical fiber connector 2 for connecting with an optical fiber adapter 1. The optical fiber connector 2 includes a housing 21 and a ferrule 22. The housing 21 has an insertion part, and the ferrule 22 passes through the insertion part. A first cantilever buckle 24 is formed on the outer side wall of the housing 21. The first cantilever buckle 24 has a first fixed end 241 and a first free end 242 that are connected to each other. The first fixed end 241 is connected to the housing 21, and the first free end 242 is disposed away from the housing 21. A snap-fit ​​part is formed on the first free end 242. The insertion part is used to insert into the inner wall of the socket 1b of the optical fiber adapter 1, and the snap-fit ​​part is used to snap into the snap-fit ​​protrusion 11 of the optical fiber adapter 1.

[0049] In this embodiment, the fiber optic connector 2 carries the ferrule 22 into the adapter cavity 1a and achieves rapid locking with the adapter at the insertion endpoint. The fiber optic connector 2 has a housing 21 and a ferrule 22. The housing 21 has an insertion portion, and the outer contour of the insertion portion forms a surface-to-surface guiding fit with the inner contour of the socket 1b, ensuring that the MT end face of the ferrule 22 is aligned with the corresponding MT end face inside the adapter. The ferrule 22 passes through the insertion portion, and its front end protrudes from the end face of the insertion portion for mating with the ferrule 22 of another fiber optic connector 2 inside the adapter. A first cantilever buckle 24 is provided on the outer side of the housing 21. The first fixed end 241 of the first cantilever buckle 24 is integrally connected to the side wall of the housing 21, and the connection position is located at the root of the insertion part, so that the first cantilever buckle 24 extends forward in the insertion direction. The first free end 242 of the first cantilever buckle 24 is away from the housing 21 and extends into the socket 1b. The snap-fit ​​part formed thereon abuts and limits the snap-fit ​​protrusion 11 in the socket 1b on the side facing away from the fiber optic connector 2, so as to realize the mechanical snap-fit ​​between the first cantilever buckle 24 and the snap-fit ​​protrusion 11, that is, to achieve locking in the insertion direction. The snap-fit ​​part can be in the form of a block protrusion or a plate protrusion, etc., and this embodiment does not limit it. The fiber optic connector 2 of this embodiment can also refer to the part of the fiber optic connector 2 described in the embodiment of the fiber optic coupling device 100 above. Therefore, it has at least all the beneficial effects brought by the technical solution of the above embodiment, and will not be described in detail here.

[0050] 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 fiber coupling device, characterized in that, The optical fiber coupling device includes: A fiber optic adapter (1) has a cavity (1a) formed inside it. Two sockets (1b) are formed on the fiber optic adapter (1), located on opposite outer walls of the fiber optic adapter (1) and communicating with the cavity (1a). A snap-fit ​​protrusion (11) and a button (12) are formed on the inner wall of each socket (1b). Fiber optic connector (2), the fiber optic connector (2) includes a housing (21) and a ferrule (22), the housing (21) has an insertion part, the insertion part is inserted into a socket (1b), the ferrule (22) passes through the insertion part, a first cantilever buckle (24) is formed on the outer side wall of the housing (21), the first cantilever buckle (24) has a first fixed end (241) and a first free end (242) connected to each other, the first fixed end (241) is connected to the housing (21), the first free end (242) is disposed away from the housing (21), and a snap-fit ​​part is formed on the first free end (242); The first free end (242) extends into a socket (1b), and the snap-fit ​​portion snaps into the snap-fit ​​protrusion (11) in the socket (1b). The button (12) is disposed opposite to the first free end (242), and the button (12) is partially exposed on the outer wall of the fiber optic adapter (1). The button (12) is configured to push the first free end (242) when pressed, so that the snap-fit ​​portion disengages from the snap-fit ​​protrusion (11).

2. The fiber optic coupling device as described in claim 1, characterized in that, The button (12) is a cantilever structure. The button (12) has a second fixed end (121) and a second free end (122) connected to each other. The outer wall of the fiber optic adapter (1) has a clearance hole (1c) that communicates with the socket (1b). The second fixed end (121) is connected to the inner wall of the clearance hole (1c). The second free end (122) is arranged opposite to the first free end (242).

3. The fiber optic coupling device as described in claim 2, characterized in that, The second free end (122) has a pressing protrusion (123) on the side opposite to the socket (1b).

4. The optical fiber coupling device as described in claim 1, characterized in that, The snap-fit ​​part is a wing plate (2421). A wing plate (2421) is provided on each of the opposite sides of the first free end (242). The two wing plates (2421) are arranged in a T-shape with the first cantilever buckle (24). Two snap-fit ​​protrusions (11) are provided at intervals on one side wall of the socket (1b). The two snap-fit ​​protrusions (11) are located on both sides of the first cantilever buckle (24), and each snap-fit ​​protrusion (11) is snapped with a wing plate (2421).

5. The fiber optic coupling device as described in claim 1, characterized in that, The snap-fit ​​protrusion (11) has a snap-fit ​​surface (111) and a guide surface (112). The snap-fit ​​surface (111) faces the cavity (1a) and is perpendicular to the inner wall of the socket (1b). The guide surface (112) faces away from the cavity (1a) and is set at an angle to the inner wall of the socket (1b). The snap-fit ​​surface (111) snaps into the snap-fit ​​part. And / or, the outer wall of the housing (21) is provided with a clearance groove (211c) facing the first free end (242).

6. The optical fiber coupling device as described in claim 1, characterized in that, The housing (21) includes a front housing (211), a rear housing (212), and a tail sleeve (213) that are detachably connected in sequence. The insertion part is formed at the end of the front housing (211) and the rear housing (212) away from the tail sleeve (213). The first cantilever buckle (24) is provided on the outer wall of the end of the rear housing (212) away from the tail sleeve (213). The front shell (211), the rear shell (212), and the tail sleeve (213) enclose a receiving cavity (21a). The end of the front shell (211) away from the rear shell (212) is provided with a mounting hole (211a) communicating with the receiving cavity (21a). The insert (22) is inserted into the mounting hole (211a). A limiting boss (221) is formed on the insert (22). The limiting boss (221) is limited to the side of the mounting hole (211a) facing the receiving cavity (21a). The side wall of the front shell (211) is also provided with an observation hole (211b) communicating with the mounting hole (211a). The end of the tail sleeve (213) away from the rear shell (212) is provided with a wire passage hole (213a). The fiber optic connector (2) also includes a spring (23), which is disposed in the receiving cavity (21a), and the two ends of the spring (23) abut against the ferrule (22) and the back shell (212) respectively.

7. The fiber optic coupling device as described in claim 6, characterized in that, The front shell (211) is provided with a second cantilever buckle (2111) at one end near the rear shell (212). The second cantilever buckle (2111) has a second fixed end (121) and a second free end (122) connected to each other. The second fixed end (121) is connected to the front shell (211), and the second free end (122) is provided with a connecting protrusion (2112). The inner cavity of the rear shell (212) is provided with a snap-fit ​​hole (212a), and the second free end (122) extends into the inner cavity of the rear shell (212) so that the connecting protrusion (2112) snaps into the inner wall of the snap-fit ​​hole (212a).

8. The fiber optic coupling device according to any one of claims 1 to 7, characterized in that, The housing (21) has a guide rail (214) at one end opposite to the first cantilever buckle (24), and a guide slot (1d) is provided at one end of the socket (1b) opposite to the snap-fit ​​protrusion (11). The guide rail (214) and the guide slot (1d) both extend along the direction from the fiber optic connector (2) to the fiber optic adapter (1), and the guide rail (214) is inserted into the inner wall of the guide slot (1d). And / or, the housing (21) has a foolproof protrusion (215) on one side wall adjacent to the first cantilever buckle (24), and a foolproof slot (1f) is provided on one side wall adjacent to the snap-fit ​​protrusion (11) in the socket (1b). The foolproof protrusion (215) and the foolproof slot (1f) both extend along the direction from the fiber optic connector (2) to the fiber optic adapter (1), and the foolproof protrusion (215) is inserted into the inner wall of the foolproof slot (1f).

9. A fiber optic adapter (1) for connection with a fiber optic connector (2), characterized in that, The fiber optic adapter (1) has a cavity (1a) and two sockets (1b) on it. The two sockets (1b) are located on opposite outer walls of the fiber optic adapter (1) and communicate with the cavity (1a). The inner wall of the socket (1b) has a snap-fit ​​protrusion (11) and a button (12). The snap-fit ​​protrusion (11) is used to snap into the snap-fit ​​portion of the fiber optic connector (2). The button (12) is partially exposed on the outer wall of the fiber optic adapter (1). The button (12) is configured to push the first cantilever latch (24) of the fiber optic connector (2) when pressed, so that the snap-fit ​​portion disengages from the snap-fit ​​protrusion (11).

10. A fiber optic connector (2) for connection with a fiber optic adapter (1), characterized in that, The fiber optic connector (2) includes a housing (21) and a ferrule (22). The housing (21) has an insertion portion, and the ferrule (22) passes through the insertion portion. A first cantilever buckle (24) is formed on the outer side wall of the housing (21). The first cantilever buckle (24) has a first fixed end (241) and a first free end (242) connected to each other. The first fixed end (241) is connected to the housing (21), and the first free end (242) is disposed away from the housing (21). A snap-fit ​​portion is formed on the first free end (242). The insertion part is used to be inserted into the inner wall of the socket (1b) of the fiber optic adapter (1), and the snap-fit ​​part is used to snap-fit ​​the snap-fit ​​protrusion (11) of the fiber optic adapter (1).

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