Dustproof MPO fiber optic adapter and fiber optic coupling assembly

Abstract

This utility model discloses a dustproof MPO fiber optic adapter and fiber optic coupling assembly, relating to the field of fiber optic communication technology. The dustproof MPO fiber optic adapter includes a first housing, a first shielding door, a second shielding door, and a second housing. The first housing has a first socket and a second socket formed at opposite ends, respectively, and the first socket and the second socket are connected. A first mounting hole and a second mounting hole are formed on opposite side walls of the first socket, respectively. The first shielding door is elastically hinged to the first housing and extends into the first socket through the first mounting hole. The second shielding door is also elastically hinged to the first housing and extends into the first socket through the second mounting hole. The first and second shielding doors abut against and shield the first socket. The second housing is detachably fitted over the first housing and shields the first and second mounting holes. The shielding door can promptly shield the first socket to prevent dust from entering and to prevent light leakage, and since the shielding door does not need to be disassembled, it avoids the problem of easy loss.

Description

Technical Field

[0001] This utility model relates to the field of optical fiber communication technology, and in particular to a dustproof MPO optical fiber adapter and optical fiber coupling component. Background Technology

[0002] An MPO fiber optic adapter, also known as a multi-fiber push-on adapter, is a multi-fiber connection device used in high-density fiber optic cabling systems. It works with an MPO fiber optic connector to couple the fibers. Specifically, a female MPO fiber optic connector with a guide hole and a male MPO fiber optic connector with a guide pin are inserted into both ends of the MPO fiber optic adapter, and the male and female connectors are interconnected within the adapter's internal cavity to couple the multi-fiber fibers.

[0003] When an MPO fiber optic adapter is idle, i.e., when neither end of the MPO fiber optic adapter has a fiber optic connector inserted, the internal cavity of the MPO fiber optic adapter is exposed, making it easy for dust to enter and contaminate the ferrule of the fiber optic connector at the other end, and also causing light leakage. The traditional approach is to install a dust cap on the end of the MPO fiber optic adapter where the MPO fiber optic connector is not inserted to block light and dust. When the MPO fiber optic connector needs to be inserted, the dust cap is removed. The problem is that the use and storage of the dust cap is extremely inconvenient, and it is often easily lost. Utility Model Content

[0004] The main purpose of this utility model is to propose a dustproof MPO fiber optic adapter and fiber optic coupling assembly, which aims to solve the problem that installing a dustproof cap on the end of the MPO fiber optic adapter that is not connected to the MPO fiber optic connector for light and dust protection, and removing the dustproof cap when the MPO fiber optic connector needs to be connected, makes the use and storage of the dustproof cap extremely inconvenient and it is often easily lost.

[0005] To achieve the above objectives, the dustproof MPO fiber optic adapter proposed in this utility model includes a first housing, a first shielding door, a second shielding door, and a second housing. The first housing has a first socket and a second socket formed at opposite ends, respectively. The first socket communicates with the second socket. A first mounting hole and a second mounting hole are formed on opposite side walls of the first socket, respectively. The first shielding door is elastically hinged to the first housing and extends into the first socket through the first mounting hole. The second shielding door is elastically hinged to the first housing and extends into the first socket through the second mounting hole. The first shielding door and the second shielding door abut against and shield the first socket. The second housing is detachably fitted over the first housing and shields the first mounting hole and the second mounting hole.

[0006] In one embodiment, the first shielding door and the second shielding door are arranged at an angle, and the angle formed by the first shielding door and the second shielding door is directed away from the second socket.

[0007] In one embodiment, the first shielding door has a first abutting protrusion on the side facing away from the second housing, and the second shielding door has a second abutting protrusion on the side facing away from the second housing. The first abutting protrusion, the first shielding door, the second shielding door, and the second abutting protrusion form a wedge-shaped groove, which gradually narrows along the direction from the first insertion port to the second insertion port.

[0008] In one embodiment, the first shielding door is provided with a first hinge shaft, the inner wall of the first socket is provided with a first hinge hole, the first hinge hole communicates with the first mounting hole, and the first hinge shaft is hinged to the inner wall of the first hinge hole; the second shielding door is provided with a second hinge shaft, the inner wall of the first socket is provided with a second hinge hole, the second hinge hole communicates with the second mounting hole, and the second hinge shaft is hinged to the inner wall of the second hinge hole.

[0009] In one embodiment, a first torsion spring is sleeved on the first hinge shaft, and the two ends of the first torsion spring abut against the first shielding door and the second housing, respectively; a second torsion spring is sleeved on the second hinge shaft, and the two ends of the second torsion spring abut against the second shielding door and the second housing, respectively.

[0010] In one embodiment, the second housing has an elastic cantilever at one end near the second socket, and the first housing has a snap-fit ​​hole, wherein the elastic cantilever snaps into the inner wall of the snap-fit ​​hole.

[0011] In one embodiment, a T-shaped guide rail is provided at one end of the second housing near the second socket, and a T-shaped insertion hole is provided on the first housing, wherein the T-shaped guide rail is inserted into the inner wall of the T-shaped insertion hole.

[0012] In one embodiment, a foolproof slot is provided on one inner wall of the second housing, and the foolproof slot communicates with the first socket; the second housing is provided with a plurality of elastic cantilever arms, which are symmetrically arranged about the central axis of the second housing; the first housing is provided with a plurality of snap-fit ​​holes, which are symmetrically arranged about the central axis of the first housing, and each elastic cantilever arm snaps into the inner wall of a snap-fit ​​hole.

[0013] In one embodiment, the dustproof MPO fiber optic adapter further includes a mounting spring, which includes a fixed part and an elastic part connected to each other. The fixed part is connected to the outer wall of the first housing, and the elastic part is disposed gradually away from the first housing along the axial direction of the first housing. The outer wall of the first housing is provided with a mounting boss, and an installation limiting space is formed between the mounting boss and the elastic part.

[0014] This utility model also proposes an optical fiber coupling assembly, which includes a first MPO optical fiber connector, a second MPO optical fiber connector, and an MPO optical fiber adapter as described in any of the above embodiments; the first MPO optical fiber connector is configured to push the first shielding door and the second shielding door to rotate so that the first MPO optical fiber connector is inserted into the inner wall of the first socket; the second MPO optical fiber connector is inserted into the inner wall of the second socket.

[0015] The dustproof MPO fiber optic adapter proposed in this utility model includes a first housing, a first shielding door, a second shielding door, and a second housing. The first housing has a first socket and a second socket at opposite ends, which are connected. The first socket has a first mounting hole and a second mounting hole on opposite side walls. The first shielding door is elastically hinged to the first housing and extends into the first socket through the first mounting hole. The second shielding door is elastically hinged to the first housing and extends into the first socket through the second mounting hole. The first shielding door and the second shielding door abut against and shield the first socket. The second housing is detachably sleeved on the outside of the first housing and shields the first mounting hole and the second mounting hole. By incorporating a first shielding door and a second shielding door within the first socket, and elastically hinged to the first housing with the first and second shielding doors abutting against each other to shield the first socket, the first socket can be closed when the MPO adapter is idle, preventing dust from entering the inner cavity of the MPO adapter and preventing light leakage to avoid eye damage to operators. When an MPO fiber optic connector needs to be inserted into the first socket, the connector is inserted, pushing against the first and second shielding doors to open the first socket. When the connector is removed, the first and second shielding doors automatically close under elastic force to restore shielding. This effectively shields the first socket from dust and light leakage, and the first and second shielding doors do not need to be disassembled, avoiding the problem of easy loss. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 A schematic diagram of a structure of an embodiment of the dustproof MPO fiber optic adapter provided by this utility model;

[0018] Figure 2 for Figure 1 Exploded view of the dustproof MPO fiber optic adapter;

[0019] Figure 3 for Figure 1 Top view of the dustproof MPO fiber optic adapter;

[0020] Figure 4 for Figure 3 A sectional view along line B-B' in the middle;

[0021] Figure 5 for Figure 1 A sectional view along line A-A'.

[0022] Figure 6 for Figure 2 A schematic diagram of the structure of the first shell in the middle;

[0023] Figure 7 for Figure 2 Schematic diagram of the structure of the second shell in the middle;

[0024] Figure 8 for Figure 2 Schematic diagram of the structure of the first and second shielding doors;

[0025] Figure 9 for Figure 2 A schematic diagram of the structure in which the spring is installed.

[0026] Explanation of icon numbers:

[0027] 100. Dustproof MPO fiber optic adapter;

[0028] 1. First housing; 1a. First socket; 1a1. First hinge hole; 1a2. Second hinge hole; 1b. Second socket; 1c. First mounting hole; 1d. Second mounting hole; 1f. Snap-fit ​​hole; 1g. T-shaped socket; 11. Mounting boss; 11a. Mounting limiting space; 12. First marking part;

[0029] 21. First shielding door; 211. First abutment protrusion; 212. First hinge shaft; 213. First torsion spring;

[0030] 22. Second shielding door; 221. Second abutment protrusion; 222. Second hinge shaft; 223. Second torsion spring;

[0031] 2a. Wedge-shaped groove;

[0032] 3. Second housing; 3a. Foolproof slot; 31. Flexible cantilever; 32. T-shaped guide rail; 33. Second marking section;

[0033] 4. Install spring clip; 41. Fixing part; 42. Elastic part.

[0034] 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

[0035] 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.

[0036] 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.

[0037] 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.

[0038] This utility model proposes a dustproof MPO fiber optic adapter 100.

[0039] Please see Figure 1 , Figure 2 and Figure 4 In one embodiment of this utility model, the dustproof MPO fiber optic adapter 100 includes a first housing 1, a first shielding door 21, a second shielding door 22, and a second housing 3. The first housing 1 has a first socket 1a and a second socket 1b formed at opposite ends, and the first socket 1a and the second socket 1b are connected. The first mounting hole 1c and the second mounting hole 1d are formed on opposite side walls of the first socket 1a, respectively. The first shielding door 21 is elastically hinged to the first housing 1 and extends into the first socket 1a from the first mounting hole 1c. The second shielding door 22 is elastically hinged to the first housing 1 and extends into the first socket 1a from the second mounting hole 1d. The first shielding door 21 and the second shielding door 22 abut against and shield the first socket 1a. The second housing 3 is detachably sleeved on the outside of the first housing 1 and shields the first mounting hole 1c and the second mounting hole 1d.

[0040] In this embodiment, the first housing 1 is the main structure of the adapter, with a first socket 1a and a second socket 1b formed at both ends for inserting an MPO fiber optic connector. A first mounting hole 1c and a second mounting hole 1d are formed on the opposite side walls of the first socket 1a for mounting a first shielding door 21 and a second shielding door 22. The first housing 1 can be made of metal or high-strength plastic to ensure structural stability and durability.

[0041] Both the first shielding door 21 and the second shielding door 22 are elastically hinged to the first housing 1. The first shielding door 21 extends into the first socket 1a through the first mounting hole 1c, and the second shielding door 22 extends into the first socket 1a through the second mounting hole 1d. The first shielding door 21 and the second shielding door 22 achieve opening and closing functions through elastic hinge with the first housing 1 and can automatically reset and close. The first shielding door 21 and the second shielding door 22 abut against each other in the first socket 1a to form a complete shielding structure. Regarding the hinge, optionally, hinge shafts can be rotatably installed on the first shielding door 21 and the second shielding door 22, and the two ends of the hinge shafts can be hinged to the inner wall of the first housing 1. Alternatively, hinge shafts can be fixedly installed on the first shielding door 21 and the second shielding door 22, and the two ends of the hinge shafts can be hinged to the inner wall of the first housing 1. Alternatively, protrusions can be provided on both sides of the first shielding door 21, and the two protrusions can be coaxially arranged and serve as hinge shafts to be hinged to the inner wall of the first housing 1. The second shielding door 22 is similar, so it will not be described in detail. Regarding elasticity, optionally, a spring with elasticity, such as a metal spring, can be provided to connect the first shielding door 21 and the first housing 1, and the spring can be preset at a certain angle so that the first shielding door 21 and the second shielding door 22 abut against each other. It should be noted that slots need to be provided on the first shielding door 21 and the first housing 1, or the spring needs to be installed by means of screws, adhesives, etc. The second shielding door 22 is similar, so it will not be described in detail. Optionally, springs, torsion springs, etc., can be used to provide elasticity. For example, a torsion spring can be sleeved on the hinge shaft of the first shielding door 21, with one end of the torsion spring abutting against the first shielding door 21 and the other end abutting against the first housing 1 or the second housing 3. The second shielding door 22 is handled similarly, so it will not be described in detail. In this way, the first shielding door 21 or the second shielding door 22 can be elastically hinged to the first housing 1. Based on the characteristics of elastic hinge, the two shielding doors can be opened and closed flexibly, while ensuring that the first insertion port 1a can be shielded in time to prevent dust from entering and light from leaking in.

[0042] The second housing 3 is detachably fitted onto the first housing 1 to cover the first mounting hole 1c and the second mounting hole 1d. Its main function is to limit the movement of the first shielding door 21 and the second shielding door 22, and to prevent dust from entering the first housing 1 through the first mounting hole 1c and the second mounting hole 1d. The material of the second housing 3 can also be metal or high-strength plastic, matching the material of the first housing 1 to ensure overall stability and durability. The detachable design of the second housing 3, covering the first mounting hole 1c and the second mounting hole 1d, not only increases the overall protection of the adapter but also facilitates maintenance and replacement of the shielding doors. The detachable design of the second housing 3 allows users to easily clean and repair it without damaging the main structure of the adapter.

[0043] In this embodiment, a first shielding door 21 and a second shielding door 22 are provided in the first socket 1a and are elastically hinged to the first housing 1. The first shielding door 21 and the second shielding door 22 abut against each other to shield the first socket 1a. This can shield the first socket 1a when the MPO adapter is idle, keeping the first socket 1a closed to prevent dust from entering the inner cavity of the MPO adapter and to prevent light leakage to avoid damage to the eyes of the staff. When it is necessary to insert an MPO fiber optic connector into the first socket 1a, the MPO fiber optic connector is inserted into the first socket 1a. The MPO fiber optic connector pushes the first shielding door 21 and the second shielding door 22 to open the first socket 1a. When the MPO fiber optic connector is pulled out of the first socket 1a, the first shielding door 21 and the second shielding door 22 automatically close under the action of elasticity to restore the shielding of the first socket 1a. In this way, the first socket 1a can be shielded in time to prevent dust from entering and to prevent light leakage. Furthermore, the first shielding door 21 and the second shielding door 22 do not need to be disassembled, thus avoiding the problem of easy loss.

[0044] Further, please refer to Figure 4 In one embodiment of the present invention, the first shielding door 21 and the second shielding door 22 are arranged at an angle, and the angle formed by the first shielding door 21 and the second shielding door 22 is directed away from the second socket 1b.

[0045] In this embodiment, the first shielding door 21 has a hinged end and a free end, and the second shielding door 22 also has a hinged end and a free end. The first shielding door 21 is used as an example below, and the second shielding door 22 is similar, so it will not be described again. The hinged end of the first shielding door 21 is located outside the first socket 1a. The free end of the first shielding door 21 extends into the first socket 1a from the first mounting hole 1c and abuts against the free end of the second shielding door 22. The free end of the first shielding door 21 can rotate around the hinged end of the first shielding door 21 to open and close the first socket 1a. It can be understood that when the first socket 1a is fully open, the free end of the first shielding door 21 abuts against the inner wall of the first socket 1a and no longer rotates. Therefore, the first shielding door 21 and the second shielding door 22 are set at an angle, with the angle facing away from the second socket 1b. This reduces the stroke required for the shielding door to be fully opened, facilitating quick opening. Furthermore, the ferrule of the MPO fiber optic connector is usually located at the center of the MPO fiber optic connector insertion end. When inserted, the triangular space formed by the first shielding door 21 and the second shielding door 22 can provide clearance space for the ferrule, allowing only the housing of the MPO fiber optic connector to be positioned relative to the first shielding door 21 and the second shielding door 22.

[0046] The second shielding door 22 makes contact, thus preventing the ferrule end of the MPO fiber optic connector from contacting the shielding door and causing contamination of the ferrule end.

[0047] Furthermore, please refer to Figure 4 and Figure 8In one embodiment of the present invention, a first abutting protrusion 211 is provided on the side of the first shielding door 21 facing away from the second housing 3, and a second abutting protrusion 221 is provided on the side of the second shielding door 22 facing away from the second housing 3. The first abutting protrusion 211, the first shielding door 21, the second shielding door 22 and the second abutting protrusion 221 form a wedge-shaped groove 2a, and the wedge-shaped groove 2a is gradually narrowed along the direction from the first insertion port 1a to the second insertion port 1b.

[0048] It should be noted that, as described in the previous embodiment, the first shielding door 21 and the second shielding door 22 are arranged at an angle. The triangular space formed by the first shielding door 21 and the second shielding door 22 can provide clearance space for the ferrule. However, the smaller the angle between the first shielding door 21 and the second shielding door 22, the greater the height of the triangular space and the longer the adapter, which is not conducive to miniaturization design and cost control. Therefore, to solve this problem, in this embodiment, a first abutting protrusion 211 and abutting protrusion 221 are respectively provided on the first shielding door 21 and the second shielding door 22 to form a wedge-shaped groove 2a. The design of the wedge-shaped groove 2a allows sufficient clearance space for the ferrule without increasing the length of the adapter, while reducing the overall size of the adapter, which is beneficial to miniaturization design and cost control.

[0049] Specifically, the first abutting protrusion 211 and the second abutting protrusion 221 can be configured as blocks or strips. Inclined surfaces are provided on the outer walls of the first abutting protrusion 211 and the second abutting protrusion 221, forming a wedge-shaped groove 2a between the inclined surfaces. The configuration of the first abutting protrusion 211 and the second abutting protrusion 221 ensures that the first shielding door 21 and the second shielding door 22 form a wedge-shaped groove 2a when they abut. Alternatively, the first abutting protrusion 211 and the second abutting protrusion 221 can be configured as plates with inclined surfaces, forming a wedge-shaped groove 2a between the two surfaces. The wedge-shaped groove 2a gradually narrows along the direction from the first socket 1a to the second socket 1b, providing clearance space for the ferrule. Furthermore, the design of the wedge-shaped groove 2a can guide the ferrule of the MPO fiber optic connector smoothly into the adapter, reducing resistance and wear during insertion.

[0050] Please see Figure 2 , Figure 6 and Figure 8 In one embodiment of this utility model, the first shielding door 21 is provided with a first hinge shaft 212, the inner wall of the first insertion port 1a is provided with a first hinge hole 1a1, the first hinge hole 1a1 communicates with the first mounting hole 1c, and the first hinge shaft 212 is hinged to the inner wall of the first hinge hole 1a1; the second shielding door 22 is provided with a second hinge shaft 222, the inner wall of the first insertion port 1a is provided with a second hinge hole 1a2, the second hinge hole 1a2 communicates with the second mounting hole 1d, and the second hinge shaft 222 is hinged to the inner wall of the second hinge hole 1a2.

[0051] In this embodiment, the first shielding door 21 and the second shielding door 22 are respectively hinged to the first hinge hole 1a1 and the second hinge hole 1a2 on the inner wall of the first socket 1a of the first housing 1 via the first hinge shaft 212 and the second hinge shaft 222. This design not only achieves the elastic hinge of the shielding door, but also ensures the stability and reliability of the shielding door. Specifically, the first hinge shaft 212 and the first shielding door 21 are integrally formed, and the connecting section of the first hinge shaft 212 protrudes from both sides of the first shielding door 21. The second hinge shaft 222 and the second shielding door 22 are integrally formed, and the connecting section of the first hinge shaft 212 protrudes from both sides of the first shielding door 21. The first hinge hole 1a1 and the second hinge hole 1a2 are respectively provided on the inner wall of the first socket 1a and communicate with the first mounting hole 1c and the second mounting hole 1d. Therefore, when the first shielding door 21 is inserted into the first socket 1a along the direction from the first mounting hole 1c to the first insertion port 1a, the first hinge shaft 212 can be simultaneously inserted into the first hinge hole 1a1 without any additional installation operations, which is simple and convenient. The same applies to the second hinge hole 1a2, so it will not be described in detail. The second housing 3 is detachably sleeved on the outside of the first housing 1 to shield the first mounting hole 1c and the second mounting hole 1d, and to confine the first shielding door 21 and the second shielding door 22 within the first hinge hole 1a1 and the second hinge hole 1a2 respectively, preventing the first shielding door 21 and the second shielding door 22 from falling off and ensuring the stable rotation of the first shielding door 21 and the second shielding door 22.

[0052] Further, please refer to Figure 4 and 8 In one embodiment of the present invention, a first torsion spring 213 is sleeved on the first hinge shaft 212, and the two ends of the first torsion spring 213 abut against the first shielding door 21 and the second housing 3 respectively; a second torsion spring 223 is sleeved on the second hinge shaft 222, and the two ends of the second torsion spring 223 abut against the second shielding door 22 and the second housing 3 respectively.

[0053] In this embodiment, the elastic hinge of the first shielding door 21 and the second shielding door 22 is achieved by respectively mounting a first torsion spring 213 and a second torsion spring 223 on the first hinge shaft 212 and the second hinge shaft 222. This design not only ensures the automatic opening and closing function of the shielding door, but also facilitates the miniaturization and lightweight design of the adapter. Specifically, the first torsion spring 213 is mounted on the first hinge shaft 212, with one end abutting against the first shielding door 21 and the other end abutting against the second housing 3; the second torsion spring 223 is mounted on the second hinge shaft 222, with one end abutting against the second shielding door 22 and the other end abutting against the second housing 3. This structure allows the shielding door to compress the torsion spring when subjected to external force, such as the insertion of an MPO fiber optic connector, and the torsion spring to release elastic potential energy after the external force is removed, causing the shielding door to automatically return to its original position and achieve automatic closing. Compared to setting up a spring, the torsion spring is sleeved on the hinge shaft, eliminating the need to set up a slot on the shielding door or the first housing 1 for the spring to be inserted, and eliminating the need to set up screws to fix the spring. This simplifies the structure and saves space, thus facilitating the miniaturization and lightweight design of the adapter.

[0054] Further, please refer to Figures 5 to 7 In one embodiment of the present invention, an elastic cantilever 31 is provided at one end of the second housing 3 near the second insertion port 1b, and a snap-fit ​​hole 1f is provided on the first housing 1, and the elastic cantilever 31 snaps into the inner wall of the snap-fit ​​hole 1f.

[0055] In this embodiment, the elastic cantilever 31 has a certain elasticity, capable of deforming under external force and returning to its original shape after the external force is removed. The first housing 1 is provided with a snap-fit ​​hole 1f, the position and size of which match the elastic cantilever 31, allowing the elastic cantilever 31 to be smoothly inserted into the snap-fit ​​hole 1f and snapped against the inner wall of the snap-fit ​​hole 1f. This snap-fit ​​structure not only ensures a secure connection between the first housing 1 and the second housing 3, but also facilitates disassembly and installation by the user. Specifically, the elastic cantilever 31 includes a cantilever portion and a snap-fit ​​protrusion. The fixed end of the cantilever portion is fixedly connected to the second housing 3, and the snap-fit ​​protrusion is located at the free end of the cantilever portion. The inner wall of the snap-fit ​​hole 1f is provided with a step or hole for the snap-fit ​​protrusion to extend into and lock. The cantilever portion can deform to disengage the snap-fit ​​protrusion from the step or hole to unlock, thus ensuring a detachable connection between the first housing 1 and the second housing 3. When the second housing 3 needs to be installed on the first housing 1, the user only needs to align the elastic cantilever 31 with the snap-fit ​​hole 1f and push the second housing 3 close to the first housing 1. Under the squeezing force of the snap-fit ​​protrusion and the inner wall of the snap-fit ​​hole 1f, the elastic cantilever 31 deforms. Under the continuous thrust, the snap-fit ​​protrusion enters the hole or step, and the elastic cantilever 31 returns to its original shape. At this time, a firm connection is formed between the first housing 1 and the second housing 3.

[0056] This embodiment achieves a robust and detachable connection between the first housing 1 and the second housing 3 by providing an elastic cantilever 31 on the second housing 3 and a snap-fit ​​hole 1f on the first housing 1. This design not only strengthens the connection between the two but also maintains structural simplicity and ease of operation.

[0057] Further, please refer to Figure 6 and Figure 7 In one embodiment of the present invention, a T-shaped guide rail 32 is provided at one end of the second housing 3 near the second socket 1b, and a T-shaped insertion hole 1g is provided on the first housing 1. The T-shaped guide rail 32 is inserted into the inner wall of the T-shaped insertion hole 1g.

[0058] In this embodiment, a T-shaped guide rail 32 is disposed at one end of the second housing 3 near the second insertion port 1b, and a T-shaped insertion hole 1g is disposed on the first housing 1. The T-shaped guide rail 32 includes two mutually perpendicular guide portions, namely two guide portions in the horizontal and vertical directions. This design not only provides guidance for the insertion of the elastic cantilever 31 into the snap-fit ​​hole 1f, but also strengthens the limitation of the radial movement of the T-shaped guide rail 32 within the T-shaped insertion hole 1g. Specifically, the two guide portions of the T-shaped guide rail 32 strengthen the limitation in two mutually perpendicular directions during insertion, ensuring the stability and accuracy of insertion and reducing possible shaking and offset during insertion. The T-shaped guide rail 32 and the T-shaped insertion hole 1g have a simple structure, require no complex mechanical parts or tools, and are easy to manufacture and assemble.

[0059] Further, please refer to Figure 2 , Figure 4 and Figure 7 In one embodiment of the present invention, a foolproof slot 3a is provided on one inner wall of the second housing 3, and the foolproof slot 3a is connected to the first socket 1a; the second housing 3 is provided with a plurality of elastic cantilever arms 31, which are symmetrically arranged about the central axis of the second housing 3; the first housing 1 is provided with a plurality of snap-fit ​​holes 1f, which are symmetrically arranged about the central axis of the first housing 1, and each elastic cantilever arm 31 snaps into the inner wall of a snap-fit ​​hole 1f.

[0060] It should be noted that in the prior art, a foolproof slot 3a is provided on one side wall inside the socket of the MPO fiber optic adapter, and a foolproof protrusion is provided on one side outer wall of the MPO fiber optic connector for insertion into the foolproof slot 3a to achieve the foolproof function. In this embodiment, the foolproof slot 3a is located in the second housing 3, the purpose of which is to realize the pole-changing function on the MPO adapter. In the prior art, pole changing is usually achieved by disassembling the MPO fiber optic connector and rotating the ferrule inside the MPO fiber optic connector 180° around the axis of the MPO fiber optic connector. For multi-core fibers, pole changing means changing the arrangement order. For single-core fibers with end faces ground at a specific angle, pole changing can change the orientation of the fiber end face.

[0061] Because MPO fiber optic connectors have numerous internal components, disassembly is cumbersome and complex, and reassembly is inconvenient. To facilitate pole replacement, this embodiment places a foolproof slot 3a on the second housing 3, and arranges multiple elastic cantilever arms 31 on the second housing 3 symmetrically about the central axis of the second housing 3. Similarly, multiple snap-fit ​​holes 1f on the first housing 1 are symmetrically arranged about the central axis of the first housing 1. It should be noted that, as... Figure 1 The dashed line represents the central axis of the first housing 1 and the second housing 3. The axial direction of the first housing 1 is the direction of its central axis, and similarly, the axial direction of the second housing 3 is the direction of its central axis. After assembly, the central axes of the first housing 1 and the second housing 3 coincide. By symmetrically arranging the multiple elastic cantilever arms 31 on the second housing 3 about its central axis, and the multiple snap-fit ​​holes 1f on the first housing 1 about its central axis, rotating the second housing 3 180° around its central axis will still allow the multiple elastic cantilever arms 31 and snap-fit ​​holes 1f to correspond one-to-one, without affecting the connection between the first housing 1 and the second housing 3. Rotating the second housing 3 180° around its central axis only changes the foolproof slot 3a to the other side inside the MPO fiber optic adapter. At this point, it is only necessary to rotate the MPO fiber optic connector 180° as a whole and then insert it into the MPO fiber optic adapter; there is no need to disassemble the MPO fiber optic connector. This method of rotating the second housing 3 180° is simpler, faster, and easier to operate than disassembling the MPO fiber optic connector and rotating the ferrule.

[0062] It should be noted that, in conjunction with the previous embodiment, this embodiment can further provide multiple T-shaped guide rails 32 at one end of the second housing 3 near the second insertion port 1b, and the multiple T-shaped guide rails 32 are symmetrically arranged about the central axis of the second housing 3. Correspondingly, multiple T-shaped insertion holes 1g are provided on the first housing 1, and the multiple T-shaped insertion holes 1g are symmetrically arranged about the central axis of the first housing 1. In this way, the guidance of the elastic cantilever 31 into the insertion hole 1f is strengthened without affecting the polarity switching function of the MPO fiber optic adapter. A first marking part 12 and a second marking part 33 can also be provided on the outer wall of the same side of the first housing 1 and the second housing 3, respectively. The first marking part 12 and the second marking part 33 can be in the form of protrusions, grooves, text, etc. After polarity switching, the first marking part 12 and the second marking part will appear on opposite sides of the MPO fiber optic adapter, thus facilitating the differentiation of polarity before and after polarity switching.

[0063] Further, please refer to Figure 1 , Figure 2 and Figure 9In one embodiment of the present invention, the dustproof MPO fiber optic adapter 100 further includes a mounting spring 4. The mounting spring 4 includes a fixing part 41 and an elastic part 42 connected to each other. The fixing part 41 is connected to the outer wall of the first housing 1, and the elastic part 42 is disposed gradually away from the first housing 1 along the axial direction of the first housing 1. The outer wall of the first housing 1 is provided with a mounting boss 11, and a mounting limiting space 11a is formed between the mounting boss 11 and the elastic part 42.

[0064] In this embodiment, the fixing part 41 is U-shaped, with a connecting section in the middle and fixing sections on both sides. The outer wall of the first housing 1 has a groove that matches the shape of the fixing part 41. Due to the elasticity and U-shaped arrangement of the mounting spring 4, the fixing sections on both sides clamp the first housing 1 and engage with the groove to achieve fixation. The fixing section is provided with an elastic part 42, which is a cantilever spring. The fixed end of the cantilever spring is closer to the second opening than the cantilever end, and the fixed end of the cantilever spring is connected to the fixing section of the mounting spring 4. The free end of the cantilever spring gradually tilts away from the outer wall of the first housing 1. The outer wall of the first housing 1 is provided with a mounting boss 11. An installation limiting space 11a is formed between the free end of the cantilever spring and the mounting boss 11. The installation limiting space 11a can be used to clamp mounting panels and other components to install the MPO adapter.

[0065] This utility model also proposes an optical fiber coupling assembly, which includes a first MPO optical fiber connector, a second MPO optical fiber connector, and an MPO optical fiber adapter as described in any of the above embodiments. The first MPO optical fiber connector is configured to push the first shielding door 21 and the second shielding door 22 to rotate so that the first MPO optical fiber connector is inserted into the inner wall of the first socket 1a; the second MPO optical fiber connector is inserted into the inner wall of the second socket 1b. The specific structure of the MPO optical fiber adapter is as described in the above embodiments. Since this optical fiber coupling assembly adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0066] 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. A dust-proof MPO fiber optic adapter, characterized in that, The dustproof MPO fiber optic adapter includes: A first housing (1) has a first socket (1a) and a second socket (1b) formed at opposite ends of the first housing (1), the first socket (1a) and the second socket (1b) are connected, and a first mounting hole (1c) and a second mounting hole (1d) are formed on opposite side walls of the first socket (1a). The first shielding door (21) is elastically hinged to the first housing (1) and extends into the first socket (1a) from the first mounting hole (1c); A second shielding door (22) is elastically hinged to the first housing (1) and extends into the first socket (1a) from the second mounting hole (1d). The first shielding door (21) abuts against and shields the first socket (1a) from the second shielding door (22). The second housing (3) is detachably fitted over the first housing (1) and covers the first mounting hole (1c) and the second mounting hole (1d).

2. The dust-proof MPO fiber optic adapter of claim 1, wherein, The first shielding door (21) and the second shielding door (22) are arranged at an angle, and the angle formed by the first shielding door (21) and the second shielding door (22) is directed away from the second socket (1b).

3. The dust-proof MPO fiber optic adapter of claim 2, wherein, The first shielding door (21) has a first abutting protrusion (211) on the side facing away from the second housing (3), and the second shielding door (22) has a second abutting protrusion (221) on the side facing away from the second housing (3). The first abutting protrusion (211), the first shielding door (21), the second shielding door (22) and the second abutting protrusion (221) form a wedge-shaped groove (2a). The wedge-shaped groove (2a) is gradually narrowed along the direction from the first socket (1a) to the second socket (1b).

4. The dust-proof MPO fiber optic adapter of claim 1, wherein, The first shielding door (21) is provided with a first hinge shaft (212), the inner wall of the first socket (1a) is provided with a first hinge hole (1a1), the first hinge hole (1a1) is connected to the first mounting hole (1c), and the first hinge shaft (212) is hinged to the inner wall of the first hinge hole (1a1). The second shielding door (22) is provided with a second hinge shaft (222), and the inner wall of the first socket (1a) is provided with a second hinge hole (1a2). The second hinge hole (1a2) is connected to the second mounting hole (1d), and the second hinge shaft (222) is hinged to the inner wall of the second hinge hole (1a2).

5. The dust-proof MPO fiber optic adapter of claim 4, wherein, A first torsion spring (213) is sleeved on the first hinge shaft (212), and the two ends of the first torsion spring (213) abut against the first shielding door (21) and the second housing (3) respectively; A second torsion spring (223) is sleeved on the second hinge shaft (222), and the two ends of the second torsion spring (223) abut against the second shielding door (22) and the second housing (3) respectively.

6. The dust-proof MPO fiber optic adapter of claim 1, wherein, The second housing (3) has an elastic cantilever (31) at one end near the second socket (1b), and the first housing (1) has a snap-fit ​​hole (1f) therein, and the elastic cantilever (31) snaps into the inner wall of the snap-fit ​​hole (1f).

7. The dust-proof MPO fiber optic adapter of claim 6, wherein, The second housing (3) has a T-shaped guide rail (32) at one end near the second socket (1b), and the first housing (1) has a T-shaped socket (1g). The T-shaped guide rail (32) is inserted into the inner wall of the T-shaped socket (1g).

8. The dust-proof MPO fiber optic adapter of claim 6, wherein, The second housing is provided with a plurality of elastic cantilever arms (31), which are symmetrically arranged about the central axis of the second housing (3); The first housing (1) is provided with a plurality of the snap-fit ​​holes (1f), which are symmetrically arranged about the central axis of the first housing (1), and each elastic cantilever (31) snaps into the inner wall of a snap-fit ​​hole (1f).

9. The dust-proof MPO fiber optic adapter of any of claims 1-8, wherein, The dustproof MPO fiber optic adapter also includes a mounting spring (4), which includes a fixing part (41) and an elastic part (42) connected to each other. The fixing part (41) is connected to the outer wall of the first housing (1), and the elastic part (42) is arranged to gradually move away from the first housing (1) along the axial direction of the first housing (1). The outer wall of the first housing (1) is provided with a mounting boss (11), and a mounting limiting space (11a) is formed between the mounting boss (11) and the elastic part (42).

10. An optical fiber coupling assembly comprising: The fiber optic coupling assembly includes a first MPO fiber optic connector, a second MPO fiber optic connector, and an MPO fiber optic adapter as described in any one of claims 1 to 9. The first MPO fiber optic connector is configured to push the first shielding door (21) and the second shielding door (22) to rotate so that the first MPO fiber optic connector is inserted into the inner wall of the first socket (1a); The second MPO fiber optic connector is inserted into the inner wall of the second socket (1b).

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