Connector, adapter and quick plug fiber optic connection assembly

Abstract

The application discloses a connector, an adapter and a quick-plug optical fiber connecting assembly, and relates to the field of optical distribution networks.The connector comprises a plug body, the plug body comprising a plug main body provided with a first cavity, a plug core fixing part and a threaded connecting part, the plug core fixing part and the threaded connecting part being respectively arranged at two ends of the plug main body and being integrally arranged with the plug main body, and the plug core fixing part being provided with an optical fiber ceramic plug core; a plug middle tube arranged in the first cavity; and a plug tail tube screwed to the threaded connecting part and abutting the plug middle tube between the plug tail tube and the optical fiber ceramic plug core.The optical fiber connecting assembly can conveniently and quickly complete the plug operation of the adapter and the connector, the locking force is reliable, and the problems of inconvenient plug operation and insufficient locking force of the existing optical fiber connecting assembly are effectively solved.

Description

[0001] This application is a divisional application of application number 201810277056.X, filed on March 30, 2018, entitled "A Connector, Adapter and Quick-Plug-in Fiber Optic Connection Assembly". Technical Field

[0002] This invention relates to the field of optical distribution networks, and more specifically to a connector, adapter, and quick-plug fiber optic connection assembly. Background Technology

[0003] With the large-scale deployment of FTTH (Fiber To The Home), fiber optic connection components are being used extensively. Generally, fiber optic connection components include fiber optic connectors and adapters. Currently, the vast majority of fiber optic connectors and adapters used are industry-standard types. These connectors and adapters were originally designed for indoor fiber optic connections or connections within protective enclosures (boxes), and therefore have the following drawbacks in practical use:

[0004] 1. Existing standard connectors and adapters have low pull-out force and cannot meet the connection requirements of optical cables and optical fibers under large tensile forces. Therefore, it is generally necessary to use hose clamps, clamps and other methods to fix and protect the optical cables and optical fibers. This undoubtedly makes the connection and plugging / unplugging operations inconvenient and also increases the cost of use.

[0005] 2. Existing standard connectors and adapters have poor dustproof and waterproof performance, and cannot be used outdoors. They can only be used indoors or in environments with protective measures, which greatly limits their use.

[0006] Currently, there are a few waterproof fiber optic connectors and adapters on the market, but most of them use a screw-on locking method. Due to their inherent characteristics, the screw-on locking method has the drawbacks of cumbersome plugging and unplugging operations and limited locking force.

[0007] Therefore, how to solve the problems of inconvenient plugging and unplugging of existing fiber optic connectors, insufficient locking force, and waterproofing and dustproofing are problems that urgently need to be solved by those skilled in the art. Summary of the Invention

[0008] This application provides a connector, adapter, and quick-plug fiber optic connection assembly that can solve the problem of low pull-out force.

[0009] In a first aspect, embodiments of this application provide a connector for optical fiber connection, the connector comprising:

[0010] The plug body includes a plug body with a first cavity, a ferrule fixing part and a threaded connection part. The ferrule fixing part and the threaded connection part are located at both ends of the plug body and are integrally formed with the plug body. The ferrule fixing part is provided with an optical fiber ceramic ferrule.

[0011] The plug tube is located inside the first cavity;

[0012] The plug tail tube is screwed to the threaded connection portion and holds the plug middle tube between the plug tail tube and the optical fiber ceramic ferrule.

[0013] In conjunction with the first aspect, in one embodiment, the optical fiber ceramic ferrule is provided with a ceramic ferrule buffer spring on the side near the first cavity, and the plug tube abuts against the ferrule buffer spring.

[0014] In conjunction with the first aspect, in one embodiment, the end of the plug tube near the fiber optic ceramic ferrule is provided with a first step extending radially.

[0015] In conjunction with the first aspect, in one embodiment, the connector is also connected to an optical cable, and the plug tail tube is used to secure the optical cable.

[0016] In conjunction with the first aspect, in one embodiment, an aluminum cup is provided at one end of the plug tail tube away from the plug middle tube. The aluminum cup is partially sleeved on the plug tail tube and is used to fix the optical cable.

[0017] In conjunction with the first aspect, in one embodiment, the plug tail tube includes a first portion with threads and a second portion with protrusions, and the aluminum cup is fitted over the second portion.

[0018] In conjunction with the first aspect, in one embodiment, the optical cable is further provided with a heat shrink tubing, and the heat shrink tubing covers the second portion.

[0019] In conjunction with the first aspect, in one embodiment, the optical cable is further provided with a heat shrink tubing, and the heat shrink tubing is used to seal the gap in the connector.

[0020] In conjunction with the first aspect, in one embodiment, the optical cable further includes an optical fiber;

[0021] The plug tube has a second cavity, which houses the optical fiber, and the inner wall of the second cavity is spaced apart from the optical fiber.

[0022] In conjunction with the first aspect, in one embodiment, the outer surface of the plug body is provided with a second step, and a first sealing ring is provided between the second step and the threaded connection portion.

[0023] In conjunction with the first aspect, in one embodiment, the plug body has an insertion structure at one end where the ferrule fixing part is provided. The insertion structure is integrally formed by extending the plug body in a direction away from the first cavity. The fiber optic ceramic ferrule is disposed in the insertion structure. The cross-section of the insertion structure is circular, and there is a hollow space between the insertion structure and the fiber optic ceramic ferrule.

[0024] In conjunction with the first aspect, in one embodiment, the plug tube and the plug body are non-threaded.

[0025] In conjunction with the first aspect, in one embodiment, the outer surface of the tube in the plug is fitted to the inner wall of the plug body.

[0026] In conjunction with the first aspect, in one embodiment, the end of the plug body is provided with a sealing ring groove, a locking groove and a positioning structure in sequence along the axial direction.

[0027] In conjunction with the first aspect, in one embodiment, the top of the locking groove is higher than the top of the sealing ring groove, and the bottom of the positioning structure is connected to the top extension surface of the locking groove.

[0028] Secondly, embodiments of this application provide another connector for fiber optic connection, comprising:

[0029] The main body has a cavity;

[0030] An optical cable is assembled in the main body and extends into the cavity;

[0031] An insertion portion is located at one end of the main body. The end of the insertion portion furthest from the main body is provided with a fiber optic ceramic ferrule. The insertion portion has a groove for engaging an adapter that matches the connector.

[0032] The insertion part is provided with a pushing device on its periphery, which is used to push the inner sleeve of the adapter that is compatible with the connector.

[0033] Thirdly, embodiments of this application provide an adapter for fiber optic connection, comprising:

[0034] The adapter body has at least one cylindrical docking portion, the docking portion having a docking channel, the adapter body having a ferrule receiving seat for accommodating fiber optic ceramic ferrules, and the docking portion having a receiving groove communicating with the docking channel.

[0035] A retaining body, which is movably housed within the receiving slot;

[0036] An outer sleeve is movably fitted outside the docking part. The outer sleeve has a first state and a second state. When the outer sleeve is in the first state, the outer sleeve abuts against the retaining body and causes part of the retaining body to extend into the docking channel in an irreversible manner. When the outer sleeve is in the second state, there is a clearance space between the outer sleeve and the opening of the receiving groove for the retaining body to exit the docking channel.

[0037] An inner sleeve is movably assembled in the docking part, and the inner sleeve is used to hold the outer sleeve in a first state after it is pushed in the insertion direction.

[0038] In conjunction with the third aspect, in one embodiment, the adapter body is provided with a directional section, a locking section and a sealing section in sequence along the axial direction.

[0039] In conjunction with the third aspect, in one embodiment, the radial dimensions of the directional section, the locking section, and the sealing section decrease sequentially.

[0040] The adapter body is provided with a directional section, a locking section and a sealing section in sequence along the axial direction.

[0041] Fourthly, embodiments of this application provide a quick-plug fiber optic connection assembly, including an adapter and a connector, wherein the adapter includes:

[0042] - Adapter body, at least one end of the adapter body is a cylindrical docking part, the docking part is provided with a docking channel, the adapter body is provided with a ferrule receiving seat for accommodating fiber ceramic ferrules, the ferrule receiving seat is located in the middle of the adapter body, and the docking part is provided with a receiving groove communicating with the docking channel.

[0043] - A retaining body, which is movably housed within the receiving slot;

[0044] - An outer sleeve is movably fitted outside the docking part. The outer sleeve has a first state and a second state. When the outer sleeve is in the first state, the outer sleeve abuts against the retaining body and causes part of the retaining body to extend into the docking channel in an irreversible manner. When the outer sleeve is in the second state, there is a clearance space between the outer sleeve and the opening of the receiving groove for the retaining body to exit the docking channel.

[0045] - An inner sleeve is movably assembled in the docking part, the inner sleeve being used to hold the outer sleeve in a first state after it is pushed in the insertion direction;

[0046] The connector includes:

[0047] - A plug body that mates with the adapter body, the plug body including a plug body with a first cavity, a ferrule fixing part and a threaded connection part, the ferrule fixing part and the threaded connection part being located at both ends of the plug body and integrally formed with the plug body, the ferrule fixing part being provided with an optical fiber ceramic ferrule;

[0048] - The plug tube is located inside the first cavity;

[0049] - A plug tail tube, which is screwed to the threaded connection portion and holds the plug middle tube between the plug tail tube and the optical fiber ceramic ferrule.

[0050] Fifthly, embodiments of this application provide another quick-plug fiber optic connection assembly, including an adapter and a connector, the adapter comprising:

[0051] - Adapter body, at least one end of the adapter body is a cylindrical docking part, the docking part is provided with a docking channel, the adapter body is provided with a ferrule receiving seat for accommodating fiber ceramic ferrules, the ferrule receiving seat is located in the middle of the adapter body, and the docking part is provided with a receiving groove communicating with the docking channel.

[0052] - A retaining body, which is movably housed within the receiving slot;

[0053] - An outer sleeve is movably fitted outside the docking part. The outer sleeve has a first state and a second state. When the outer sleeve is in the first state, the outer sleeve abuts against the retaining body and causes part of the retaining body to extend into the docking channel in an irreversible manner. When the outer sleeve is in the second state, there is a clearance space between the outer sleeve and the opening of the receiving groove for the retaining body to exit the docking channel.

[0054] - An inner sleeve is movably assembled in the docking part, the inner sleeve being used to hold the outer sleeve in a first state after it is pushed in the insertion direction;

[0055] The connector includes:

[0056] - Main body, wherein the main body is provided with a cavity;

[0057] - An optical cable is installed in the main body, and the optical cable extends into the cavity;

[0058] - An insertion portion located at one end of the main body, wherein the end of the insertion portion away from the main body is provided with an optical fiber ceramic ferrule, and the insertion portion is provided with a groove for engaging an adapter that matches the connector. Meanwhile...

[0059] - A pushing device is provided around the insertion part, which is used to push the inner sleeve of the adapter that is compatible with the connector; simultaneously,

[0060] When the connector is inserted into the adapter, the pushing device abuts against the inner sleeve, and the outer sleeve remains in the first state, with part of the retaining body extending irreversibly into the docking channel and retaining in the groove.

[0061] The beneficial effects of the technical solutions provided in this application include:

[0062] 1. The locking principle of this invention utilizes the cooperation of a steel ball and an annular groove for locking. The locking force is greater than that of existing standard connectors using snap-locking devices, making it more suitable for complex outdoor environments. Furthermore, it requires less insertion force, provides greater locking force, and allows for easy removal of the connector after unlocking the steel ball and annular groove with minimal removal force. This convenient operation effectively solves the problems of inconvenient insertion and removal and insufficient locking force in existing fiber optic connectors.

[0063] 2. In this invention, at least one O-ring is embedded in the contact surface between the connector plug body and the adapter body. This O-ring design creates a closed space between the connector and the adapter, ensuring good dust and water resistance after the connector and adapter are connected. This solves the problem of poor dust and water resistance in existing fiber optic connection components, making them unsuitable for outdoor use.

[0064] 3. In this invention, when the adapter is not mated with the connector, a protective plug can be inserted into the adapter; when the connector is not mated with the adapter, a protective cap can be fitted onto the connector's plug body. The design of the protective plug and the protective cap provides excellent dust and water protection for the adapter and connector when they are not mated, thereby effectively ensuring the service life of the adapter and connector.

[0065] 4. The present invention can design the fiber optic connection component as a "single-end waterproof locking type" or a "double-end waterproof locking type" according to different usage requirements, which has a wide range of applications and is economical and practical. Attached Figure Description

[0066] Figure 1 This is a schematic diagram of the adapter structure in an embodiment of the present invention;

[0067] Figure 2 for Figure 1 Cross-sectional view along the AA' direction;

[0068] Figure 3 This is a schematic diagram of the connector structure in an embodiment of the present invention;

[0069] Figure 4 for Figure 3 Cross-sectional view along the BB' direction;

[0070] Figure 5 This is a schematic diagram showing the adapter and connector in their pre-dating state.

[0071] Figure 6 This is a schematic diagram showing the adapter and connector in the process of mating and insertion.

[0072] Figure 7 A diagram illustrating the process of preparing the connector to be unplugged from the adapter;

[0073] Figure 8 This is a diagram illustrating the process of the connector being pulled out after the steel ball has been unlocked.

[0074] Figure 9 A schematic diagram showing the structure for adding an O-ring to the connector and a sealing gasket to the adapter;

[0075] Figure 10 This is a schematic diagram of the structure of the protective plug inserted into the adapter;

[0076] Figure 11 A schematic diagram of a protective cap fitted over the connector plug body;

[0077] Figure 12 This is a schematic diagram of the structure of the "single-end waterproof locking type" adapter in an embodiment of the present invention;

[0078] Figure 13 This is a schematic diagram of the structure of the "double-ended waterproof locking type" adapter in an embodiment of the present invention;

[0079] Figure 14 A schematic diagram of a specific embodiment of a connector;

[0080] Figure 15 for Figure 14 A schematic diagram showing the connector and adapter after mating.

[0081] Figure 16 A schematic diagram of a specific embodiment of a protective cap;

[0082] Figure 17 for Figure 16 Medium protective helmet set Figure 14 A schematic diagram of the connector;

[0083] Figure 18 A schematic diagram of a specific embodiment of a protective plug;

[0084] Figure 19 for Figure 18 A schematic diagram of the protective plug being inserted into the adapter;

[0085] Figure 20 This is a schematic diagram of a specific embodiment of a card holder.

[0086] Figure label:

[0087] 1-Adapter, 101-Adapter body, 101a-Mating channel, 101b-Receiving slot, 101c-Gift space, 102-Ceramic sleeve, 103-Orienting limiting groove, 104-Steel ball, 105-Outer sleeve, 105a-Holding block, 106-Inner sleeve, 107-Outer spring, 108-Inner spring, 109-Outer retaining ring, 110-Inner retaining ring, 111-Bevel, 112-Sealing gasket;

[0088] 2-Connector, 201-Plug body, 201a-Main body, 201b-Cavity, 201c-Insertion part, 201d-Flange fixing part, 201e-Plug body, 201f-First cavity, 201g-Threaded connection part, 201h-Second step, 201i-First sealing ring, 201j-Insertion structure, 201k-Positioning key, 202-Fiber optic cable, 203-Fiber optic ceramic ferrule, 204-Fixed 205-Plug outer sleeve, 206-Push-up device, 207-Annular groove, 208-O-ring seal, 209-Plug middle tube, 209a-Second cavity, 209b-First step, 210-Plug tail tube, 211-Aluminum tube, 212-Inner waterproof O-ring seal, 213-Aluminum cup, 214-Optical cable tail sheath, 215-Optical cable, 216-Heat shrink tubing, 217-Ceramic ferrule buffer spring;

[0089] 3-Protective plug; 4-Protective cap; 40-Matching part; 42-Plug housing; 43-Elastic arm; 44-Clamping block. Detailed Implementation

[0090] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0091] Example 1:

[0092] Please also refer to Figures 1 to 19 This invention provides a connector 2 for optical fiber connection. The connector 2 includes a plug body 201, which carries an optical cable 215 and is designed for hand-held operation. The plug body 201 has a plug sleeve 205 on its exterior, and the front end of the plug sleeve 205 has a pushing device 206. The outer surface of the plug body 201 has a groove for engaging with a mating adapter. The groove can be an annular groove 207. Compared to the threaded connection method used in the prior art, using a groove as the connection structure can withstand greater pull-out force and does not require rotation, allowing for direct insertion and convenient operation. Furthermore, because rotation is not required, less space is needed for hand operation, increasing the density of connectors on the panel.

[0093] Example 2:

[0094] Please also refer to Figures 1 to 19 As an optional embodiment, this embodiment differs from Embodiment 1 in that the pushing device 206 is used to push the inner sleeve 106 of the adapter 1 that is adapted to the connector 2, so as to cause the adapter 1 to change state and connect with the connector. Of course, the pushing device 206 can also push other similar structures of the adapter 1, as long as it can cause the adapter 1 to change state and achieve the effect of connection.

[0095] Example 3:

[0096] Please also refer to Figures 1 to 19 As an optional embodiment, the difference between this embodiment and embodiment 1 is that the pushing device 206 is a pushing block extending from the outer surface of the plug body 201. If the pushing device 206 adopts this structure, the inner sleeve 106 that matches the pushing device 206 may be provided with a protrusion (not shown) that protrudes from the outer sleeve 205, so that the pushing device 206 can push the inner sleeve 106 and move axially relative to the outer sleeve 205.

[0097] Example 4:

[0098] Please also refer to Figures 1 to 19 As an optional embodiment, the difference between this embodiment and embodiment 1 is that the pushing device 206 is a pushing piece spaced apart from the surface of the plug body 201. The pushing piece can be directly inserted into the outer sleeve 205 so that the pushing device 206 can push the inner sleeve 106 and move axially relative to the outer sleeve 205.

[0099] In summary, different pusher devices 206 structures need to be adapted to different inner sleeves 106, so that the pusher device 206 can push the inner sleeve 106 to move axially relative to the outer sleeve 205.

[0100] Example 5:

[0101] Please also refer to Figures 1 to 19 Specifically, the difference between this embodiment and Embodiment 1 is that the plug body 201 includes:

[0102] The main body 201a has a cavity 201b for connecting the optical cable 215.

[0103] An insertion portion 201c is located at one end of the main body 201a. At the end of the insertion portion 201c away from the main body 201a, a ferrule fixing portion 201d is provided. An optical fiber ceramic ferrule 203 is fixed to the ferrule fixing portion 201d. The groove is located on the outer surface of the insertion portion 201c. By placing this connecting structure, the groove, on the insertion portion 201c, instead of using threads on the plug as in the prior art, the adapter diameter can be reduced.

[0104] Furthermore, the groove is located on the outer surface of the area where the insertion part 201c is provided with the core fixing part 201d.

[0105] Because the ferrule fixing part 201d has a larger wall thickness, and its strength is greater after the fiber ceramic ferrule 203 is installed in the ferrule fixing part, the groove will be subjected to radial pressure when the connector 2 is subjected to tension after being connected to the adapter 1. The groove is located here to withstand greater radial force, further improving the ability to withstand pull-out force.

[0106] Specifically, the plug outer sleeve 205 extends from the main body 201a towards the insertion portion 201c, and the pushing device 206 is a pushing plate extending from the end of the plug outer sleeve 205, and the pushing plate is spaced apart from the insertion portion 201c. Because the pushing plate is spaced apart from the insertion portion 201c, the pushing plate can abut against the inner sleeve 106 and extend between the adapter's outer sleeve 105 and the mating portion 40, thereby securing the adapter to the connector.

[0107] Optionally, the groove is an annular groove 207 arranged around the circumference of the plug body 201; or, the groove is a hemispherical groove.

[0108] Using either the annular groove 207 or the hemispherical groove has its advantages. The annular groove 207 does not require very precise deflection angle alignment, while the hemispherical groove requires more precise deflection angle alignment; otherwise, the retaining body of the adapter 1 may not be able to accurately engage at the center of the hemispherical groove. However, since the hemispherical groove often matches the shape of the retaining body better, it can provide a better retaining effect, thereby improving the ability to withstand pull-out forces. In this embodiment, for ease of processing, and because the annular groove 207 can already withstand very high pull-out forces, the annular groove 207 is preferably selected in this embodiment of the invention.

[0109] Example 6:

[0110] Please also refer to Figures 1 to 19 The present invention also provides a connector for optical fiber connection, comprising:

[0111] Main body 201a, wherein the main body 201a is provided with a cavity 201b;

[0112] An optical cable 215 is assembled in the main body 201a, and the optical cable 215 extends into the cavity 201b;

[0113] An insertion portion 201c is located at one end of the main body 201a, and an optical fiber ceramic ferrule 203 is provided at the end of the insertion portion 201c away from the main body 201a. The insertion portion 201c has a groove for engaging with an adapter that matches the connector.

[0114] The insertion part 201c is provided with a pushing device 206 on its periphery. The pushing device 206 is used to push the inner sleeve 106 of the adapter that is compatible with the connector.

[0115] Because the overall strength of the groove is greater than that of the thread, the engagement through the groove can withstand a greater pull-out force. Furthermore, a pushing device 206 is provided around the insertion part 201c to trigger the adapter 1 to connect and lock. Since no rotation is required, it can be directly inserted, making operation convenient. And because no rotation is needed, the required space for manual operation is small, which can increase the density of connectors 2 on the panel.

[0116] Furthermore, the pushing device 206 is a pushing block provided on the outer surface of the insertion part 201c. If the pushing device 206 adopts this structure, the inner sleeve 106 that matches the pushing device 206 may be provided with a protrusion (not shown) that protrudes from the outer sleeve 205, so that the pushing device 206 can push the inner sleeve 106 and move axially relative to the outer sleeve 205.

[0117] Optionally, the pushing device 206 is a pushing plate spaced apart from the outer surface of the insertion portion 201c. Because the pushing plate is spaced apart from the insertion portion 201c, the pushing plate can abut against the inner sleeve 106 and extend between the outer sleeve 105 of the adapter and the mating portion 40, so that the adapter is held in place on the connector.

[0118] Furthermore, the groove is located on the outer surface of the area where the fiber optic ceramic ferrule 203 is mounted in the insertion portion 201c. Because the ferrule fixing portion 201d has a greater wall thickness, its strength is greater after the fiber optic ceramic ferrule 203 is inserted into the ferrule fixing portion. When the connector 2 is connected to the adapter 1 and subjected to tension, the groove will experience radial pressure. The groove's location here allows it to withstand greater radial force, further improving its ability to withstand pull-out forces.

[0119] Example 7:

[0120] Please refer to Figure 1-19 The present invention also provides an adapter 1 for optical fiber connection, comprising:

[0121] The adapter body 101 has at least one cylindrical docking portion 40, which is provided with a docking channel 101a. The adapter body 101 is provided with a ferrule receiving seat 42 for accommodating the optical fiber ceramic ferrule 203. The ferrule receiving seat 42 is located in the middle of the adapter body 101, and the docking portion 40 is provided with a receiving groove 101b communicating with the docking channel 101a.

[0122] A retaining body, which is movably housed within the receiving groove 101b;

[0123] An outer sleeve 105 is movably fitted outside the docking part 40. The outer sleeve 105 has a first state and a second state. When the outer sleeve 105 is in the first state, the outer sleeve 105 abuts against the retaining body and causes part of the retaining body to extend irreversibly into the docking channel 101a. When the outer sleeve 105 is in the second state, a clearance space 101c is provided between the outer sleeve 105 and the opening of the receiving groove 101b to allow the retaining body to exit the docking channel 101a.

[0124] An inner sleeve 106 is movably mounted on the docking part 40, and the inner sleeve 106 is used to hold the outer sleeve 105 in a first state after it is pushed in the insertion direction.

[0125] When the outer sleeve 105 is in the first state, part of the retaining body extends irreversibly into the mating channel 101a. The part extending into the mating channel 101a is used to mate with the groove of the connector 2 to connect and lock the connector 2 and the adapter 1. Since the retaining body is held in place and cannot be withdrawn, its mating channel 101a makes the connection between the connector 2 and the adapter 1 very strong and can withstand very high tensile force.

[0126] Example 8:

[0127] For details, please refer to Figure 1-19 Compared to Embodiment 7, specifically, the retaining body is a steel ball 104, and the receiving groove 101b is a cylindrical hole. A stop is provided at the bottom of the receiving groove 101b to prevent the steel ball 104 from falling completely out of the receiving groove 101b. Specifically, the stop is a funnel structure at the bottom of the receiving groove 101b. It is foreseeable that various other stopping methods exist, such as providing protrusions on the inner wall of the bottom of the receiving groove 101b. The steel ball 104 is chosen as the retaining body because the steel ball itself has high strength and is not easily jammed when moving up and down within the receiving groove 101b. The bottom of the receiving groove 101b also has an arc-shaped, inwardly recessed stop structure to prevent the retaining body from falling out of the receiving groove 101b.

[0128] Furthermore, the outer sleeve 105 is provided with a retaining block 105a protruding from the inner wall. When the outer sleeve 105 moves to the first state, the retaining block 105a is located at the receiving groove 101b and abuts against the retaining body. By providing a retaining block on the inner wall of the outer sleeve, space is provided in other areas besides the retaining block for the retaining body. Except in the first state, the retaining body is not abutted and remains in the first state, and the retaining body can also completely return to the receiving groove 101b.

[0129] Based on the above technical solution, the supporting block 105a has a slope 111 on the side near the insert receiving seat 42. When switching from the first state to the second state, the slope 111 can guide the retaining body downward, making the switch between the first state and the second state smoother.

[0130] Furthermore, the mating portion 40 includes a first segment near the ferrule receiving seat 42 and a second segment extending further from the first segment, with the radius of the first segment being larger than that of the second segment. The outer sleeve 105 is fitted onto the first segment at one end near the ferrule receiving seat 42. When switching between the first and second states, the abutment block 105a moves axially on the second segment. The diameter difference between the first and second segments is to create space for the abutment block 105a to move, thereby reducing the diameter of the outer sleeve 105 and thus reducing the overall diameter of the adapter 1.

[0131] Furthermore, the rear end faces of the inner sleeve 106 are supported by the outer sleeve 105 via the outer spring 107. When the outer sleeve 105 is in the first state, the inner sleeve 106 holds the outer sleeve 105 in the first state by the outer spring 107. It is conceivable that the outer spring 107 can also be replaced by other elastic elements, such as an elastomer, a repelling magnet, etc. In this embodiment, a spring is preferred.

[0132] The outer spring 107 is used to push the outer sleeve 105 forward after the inner sleeve 106 is pushed by the pushing device 206 until the retaining body is stuck in the groove. At this time, the outer spring 107 keeps the outer sleeve 105 in the original position, that is, the outer spring 107 keeps the outer sleeve 105 in the first state, so that the abutment block 105a abuts against the retaining body, preventing the retaining body from retracting after the connector 2 is subjected to tension, causing the connector 2 and the adapter 1 to separate in the state that needs to be connected.

[0133] Example 9:

[0134] Please refer to Figures 1-19 As an optional implementation, an axially arranged inner spring 108 is provided between the inner sleeve 106 and the mating portion 40. The inner spring 108 is provided so that the inner sleeve 106 and the outer sleeve 105 can be springed back as a whole after the connector and adapter are disconnected.

[0135] Furthermore, the elastic force of the outer spring 107 is greater than that of the inner spring 108. This makes the elastic force of the outer spring 107 greater than that of the inner spring 108.

[0136] Specifically, the inner sleeve 106 is assembled between the outer sleeve 105 and the mating part 40, and the inner sleeve 106, the outer sleeve 105, and the mating part 40 can slide relative to each other in pairs. This allows the adapter 1 to switch between a first state and a second state.

[0137] Furthermore, a retaining ring is provided at the end of the outer sleeve 105 and the mating portion 40 facing the inner sleeve 106. The retaining ring prevents the inner sleeve 106 from being pushed out of the outer sleeve 105 by the inner spring 108 and the outer spring 107.

[0138] Example 10:

[0139] Please refer to Figure 20 As an optional embodiment, the retaining body includes an elastic arm 43 extending from the docking portion 40, and a retaining block 44 is provided at the end of the elastic arm 43; when the outer sleeve 105 is in the first state, the elastic arm 43 is in a state of no elastic deformation, and the retaining block 44 is completely received in the receiving groove 101b; when the outer sleeve 105 is in the first state, the outer sleeve 105 abuts against the retaining block 44, and the retaining block 44 partially extends into the docking channel 101a.

[0140] Compared to the method of holding with steel balls, the embodiment with a holding block 44 at the end of the elastic arm 43 allows the holding block 44 to automatically exit the docking channel 101a when the outer sleeve 105 is retracted to the second state. However, due to the friction between the elastic arm 43 and the outer sleeve 105, a greater force is required for the transition between the first and second states.

[0141] Example 11:

[0142] The present invention also provides a quick-plug fiber optic connection assembly, including an adapter 1 and a connector 2, wherein the adapter 1 includes an adapter body 101, a retainer, an outer sleeve 105 and an inner sleeve 106.

[0143] The adapter body 101 has at least one cylindrical docking portion 40, the docking portion 40 is provided with a docking channel 101a, the adapter body 101 is provided with a ferrule receiving seat 42 for accommodating the optical fiber ceramic ferrule 203, the ferrule receiving seat 42 is located in the middle of the adapter body 101, and the docking portion 40 is provided with a receiving groove 101b communicating with the docking channel 101a.

[0144] The retaining body is movably housed within the receiving slot 101b;

[0145] The outer sleeve 105 is movably sleeved on the outside of the docking part 40. The outer sleeve 105 has a first state and a second state. When the outer sleeve 105 is in the first state, the outer sleeve 105 abuts against the retaining body and causes part of the retaining body to extend into the docking channel 101a in an irreversible manner. When the outer sleeve 105 is in the second state, a clearance space 101c is provided between the outer sleeve 105 and the opening of the receiving groove 101b to allow the retaining body to exit the docking channel 101a.

[0146] The inner sleeve 106 is movably assembled in the docking part 40, and the inner sleeve 106 is used to hold the outer sleeve 105 in a first state after it is pushed in the insertion direction.

[0147] Connector 2 includes:

[0148] Main body 201a, wherein the main body 201a is provided with a cavity 201b;

[0149] An optical cable 215 is assembled in the main body 201a, and the optical cable 215 extends into the cavity 201b;

[0150] An insertion portion 201c is located at one end of the main body 201a. The end of the insertion portion 201c away from the main body 201a is provided with a fiber optic ceramic ferrule 203. The insertion portion 201c has a groove for engaging with an adapter that matches the connector.

[0151] - A pushing device 206 is provided around the insertion part 201c. The pushing device 206 is used to push the inner sleeve 106 of the adapter that is compatible with the connector; at the same time...

[0152] When the connector 2 is inserted into the adapter 1, the pushing device 206 abuts against the inner sleeve 106, and the outer sleeve 105 remains in the first state, with part of the retaining body extending irreversibly into the docking channel 101a and being held in the groove.

[0153] The locking force of the connection method using a retainer and groove is greater than that of the snap-locking device used in existing standard connectors, making it more suitable for complex outdoor scenarios and able to withstand greater pull-out force. Furthermore, it requires less insertion force, provides greater locking force, and allows for smooth removal of the connector with minimal force, offering convenient operation and effectively solving the problems of inconvenient insertion and removal and insufficient locking force in existing fiber optic connectors.

[0154] Example 12: See Figures 1 to 8 As shown, this embodiment of the invention provides a quick-plug fiber optic connection assembly, including an adapter 1 and a connector 2. See also... Figure 1As shown, the adapter 1 includes an adapter body 101 that can mate with the connector 2 at both ends. The adapter body 101 contains a ceramic sleeve 102 required for mates with the fiber optic ceramic ferrule 203 of the connector 2. Either end of the adapter body 101 has a locking structure, which includes a directional limiting groove 103 formed on the inner wall of the adapter body 101. Figure 2 As shown, the adapter body 101 has a steel ball 104 (preferably a stainless steel ball) embedded in its outer wall, an outer sleeve 105 that is sleeved on the outside of the adapter body 101 and presses against the steel ball 104, and an inner sleeve 106 disposed between the adapter body 101 and the outer sleeve 105. The directional limiting groove 103 is evenly distributed along the circumference of the adapter body 101 in multiple ways (in this embodiment, three are evenly distributed; the specific number can be set according to actual conditions). It is used to position the rotation direction of the connector 2 during docking, ensuring accurate docking with the end face of the fiber optic ceramic ferrule 203 of the connector 2 and guiding the docking of the connector 2. The rear end face of the inner sleeve 106 is connected to the outer sleeve via an outer spring 107 and an inner spring 108. The sleeve 105 and the adapter body 101 abut against each other, and the elastic force of the outer spring 107 is greater than that of the inner spring 108. The front end face of the inner sleeve 106 is abutted by the outer sleeve 105 and the adapter body 101 through the outer retaining ring 109 and the inner retaining ring 110, respectively, to ensure that the inner sleeve 106 will not pop out relative to the outer sleeve 105 and the adapter body 101 under the action of the two springs. Furthermore, the outer sleeve 105, the adapter body 101 and the inner sleeve 106 can slide relative to each other in the insertion direction of the connector 2. The inner side wall of the outer sleeve 105 has a slope 111, which is used to press the steel ball 104 into the connector 2 through the slope 111 after the outer sleeve 105 slides to lock the connector 2.

[0155] See Figure 3 As shown, the connector 2 includes a plug body 201, which houses an optical fiber 202. The front end of the optical fiber 202 is connected to an optical fiber ceramic ferrule 203, with the front end of the optical fiber ceramic ferrule 203 protruding from the plug body 201. Wherein, as... Figure 4As shown, the outer surface of the plug body 201 is provided with directional limiting protrusions 204 that are adapted to the directional limiting groove 103 of the adapter 1. The specific distribution position and number of these protrusions are adapted to the directional limiting groove. They are used to cooperate with the directional limiting groove 103 during docking and play a guiding role to ensure the rotation direction of the connector 2 during docking. The plug body 201 is provided with a plug sleeve 205. The front end of the plug sleeve 205 has a protruding pushing device 206, which is used to cooperate with the inner sleeve 106 of the adapter 1 during docking and push the inner sleeve 106 to slide relative to the adapter body 101 in the insertion direction. The outer surface of the plug body 201 is provided with a ring groove 207 around its circumference, which is used to cooperate with the steel ball 104 during docking and play a locking role. When adapter 1 is mated with connector 2, the pushing device 206 of connector 2 pushes the inner sleeve 106 of adapter 1 to slide relative to the adapter body 101 in the insertion direction. At the same time, the outer sleeve 105 also slides in the insertion direction of connector 2 under the action of the outer spring 107. After sliding, the outer sleeve 105 presses the steel ball 104 into the annular groove 207 of connector 2 through the inclined surface 111 of its inner sidewall and locks it in place, thereby achieving the purpose of locking connector 2.

[0156] Specifically, see Figure 5 As shown, when adapter 1 and connector 2 are in the pre-interaction state, the outer spring 107 and inner spring 108 of adapter 1 are both in an uncompressed state. The uncompressed state referred to here does not include the pre-compressed state that the springs themselves have after assembly. Generally, the springs are in a pre-compressed state relative to their original length after installation. The outer sleeve 105 of adapter 1 is in a state where the steel ball 104 is not pressed. At this time, the steel ball 104 can move in the gap between the outer sleeve 105 and the adapter body 101, ensuring that the steel ball 104 will not affect the insertion of connector 2 before the annular groove 207 of connector 2 reaches the predetermined position.

[0157] See Figure 6 As shown, when adapter 1 and connector 2 are in the process of mating and insertion, the protruding pusher 206 on connector 2 pushes the inner sleeve 106 of adapter 1 to slide in the direction of connector 2 insertion. Because the elastic force of the outer spring 107 is greater than that of the inner spring 108, the sliding of the inner sleeve 106 preferentially compresses the inner spring 108, and the outer sleeve 105 is also pushed by the outer spring 107 to slide in the direction of connector 2 insertion. When connector 2 is in the predetermined position, the outer sleeve 105 is also in the state of pressing the steel ball 104. At this time, the slid outer sleeve 105 presses the steel ball 104 into the annular groove 207 of connector 2 through the inclined surface 111 of its inner sidewall and locks it in place. The steel ball 104 and the annular groove 207 of connector 2 cooperate, making it impossible for adapter 1 and connector 2 to move, thereby completing the locking operation of connector 2.

[0158] See Figure 7 As shown, when connector 2 is about to be pulled out of adapter 1, first, slide the outer sleeve 105 of adapter 1 in the direction that connector 2 will be pulled out, so that the steel ball 104 can move up and down within the gap between the outer sleeve 105 and the adapter body 101. The purpose is to unlock the annular groove 207 of connector 2. Figure 8 As shown, when the steel ball 104 is in the unlocked state, the connector 2 is moved further in the direction of being pulled out. At this time, the steel ball 104 is dislodged from the annular groove 207 of the connector 2, and there is no locking function. The connector 2 can be pulled out of the adapter 1 smoothly.

[0159] The above operations allow for a simple and quick plugging and unplugging of adapter 1 and connector 2, with reliable locking force, effectively solving the problems of inconvenient plugging and unplugging operations and insufficient locking force in existing fiber optic connection components.

[0160] Based on the above, in order to solve the problem of poor dust and water resistance of the existing standard connector 2 and adapter 1, see [link to relevant documentation]. Figure 9 As shown, at least one O-ring 208 is embedded in the contact surface between the plug body 201 of the connector 2 and the adapter body 101. The design of this O-ring 208 ensures that, specifically, there is a connection between the connector 2 and the adapter 1. Figure 9 The area to the left of the O-ring forms a closed space, ensuring good dust and water resistance after connector 2 and adapter 1 are mated. Additionally, when adapter 1 is installed on the mounting interface, a sealing gasket 112 is provided on the contact surface between the adapter body 101 and the mounting interface. This sealing gasket 112 design also provides good dust and water resistance between adapter 1 and the mounting interface. In this embodiment, both the O-ring 208 and the sealing gasket 112 are made of rubber or silicone. Furthermore, two O-rings 208 are provided, forming a double O-ring 208 design.

[0161] Furthermore, it is understandable that in practical applications, such as Figure 10 As shown, when adapter 1 is not mated with connector 2, a protective plug 3 can be inserted into adapter 1. This protective plug 3 has a push-out device 206, an annular groove 207, and an O-ring 208, identical in structure to those in connector 2. Similarly, it can be understood that in practical applications, such as... Figure 11 As shown, when connector 2 is not connected to adapter 1, a protective cap 4 can be fitted over the plug body 201 of connector 2. The protective cap 4 is connected to the plug outer sleeve 205 of connector 2 by a thread.

[0162] Furthermore, it is understandable that in practical applications, fiber optic connectors can be designed as either "single-end waterproof locking type" or "double-end waterproof locking type" depending on the usage requirements. For example... Figure 12 As shown, the "single-end waterproof locking type" means that one end of the adapter body 101 has a locking structure for mating with the aforementioned dustproof, waterproof, and locking connector 2, while the other end does not have a locking structure and is used for mating with the existing standard connector 2. Figure 13 As shown, the "double-ended waterproof locking type" means that both ends of the adapter body 101 have locking structures, which are used to mate with the connector 2 that has dustproof, waterproof and locking functions.

[0163] Furthermore, it is understood that the adapter body 101 of the present invention can be selected from currently industry standard adapter bodies 101, including SCSquare Connector, square fiber optic connector type, FCFerrule Connector, sleeve connector type, single-gang LCLucent Connector, Lucent connector type, dual-gang LC type, E2000 type, etc. Depending on the end-face grinding method of the fiber ceramic ferrule 203, the connector 2 can be further divided into UPC type with a super physical end face and APC type with an angled physical end face. Therefore, to adapt to the industry standard adapter body 101, the connector 2 of the present invention can be further divided into SC-APC / UPC type, FC-APC / UPC type, single-gang LC-APC / UPC type, dual-gang LC-APC / UPC type, E2000-APC / UPC type, etc.

[0164] To better understand the present invention, the above-mentioned optical fiber connection components will be further described in detail below through several specific embodiments.

[0165] See Figure 14 As shown, this illustrates an embodiment of connector 2, which can be classified into UPC type and APC type depending on the end face grinding method of the fiber optic ceramic ferrule 203. Specifically, connector 2 includes:

[0166] O-ring 208, which is embedded in the plug body 201 and is made of silicone, and two O-rings 208 are provided according to the waterproof requirements.

[0167] Fiber optic ceramic ferrules 203 can be divided into UPC and APC according to the polishing method of their end faces;

[0168] The ceramic ferrule buffer spring 217 is used to buffer and protect the fiber optic ceramic ferrule 203 when the connector 2 is mated with the adapter 1.

[0169] The plug body 201 has the following features: an O-ring 208 mounting groove, an annular groove 207, and a directional limiting protrusion 204.

[0170] The plug jacket 205 is used to protect the stripped optical fiber cable. The front end of the plug jacket 205 has a protruding push device 206, which is used to push the inner sleeve 106 on the adapter 1 when the adapter 1 is inserted.

[0171] The plug tube 209 is used to protect the stripped optical fiber cable.

[0172] The plug tail tube 210 is used to protect the stripped optical fiber cable, and also works with the aluminum cup 213 to fix the outer sheath of the optical cable 215.

[0173] Fiber 202 is the exposed fiber after the fiber optic cable 215 has been stripped.

[0174] Aluminum tube 211 is used in conjunction with aluminum cup 213 to fix aramid fiber or tensile metal wire inside optical cable 215;

[0175] The inner waterproof O-ring 212 is used to prevent water from entering the plug tube 209 and plug tail tube 210 at the tail end of connector 2, thus ensuring the waterproof effect inside connector 2.

[0176] Aluminum cup 213 is used to cooperate with plug tail tube 210 and aluminum tube 211 to fix the outer sheath of optical cable 215 and aramid fiber or tensile metal wire, respectively.

[0177] The fiber optic cable tail sheath 214 is used to cushion the fiber optic cable 215 when it is bent, so as to prevent damage to the optical fiber due to excessive bending. It can be made of soft plastic or metal spring.

[0178] Fiber optic cable 215;

[0179] Heat shrink tubing 216 is used to seal the gap between the optical cable and the components after the optical cable is fixed. Its protection performance can reach IP68, which is the highest level of waterproof rating standard for connectors.

[0180] The plug body 201 includes a plug body 201e with a first cavity 201f, a ferrule fixing part 201d, and a threaded connection part 201g. The ferrule fixing part 201d and the threaded connection part 201g are located at both ends of the plug body 201e and are integrally formed with the plug body 201e. An optical fiber ceramic ferrule 203 is provided at the ferrule fixing part 201d.

[0181] The plug tube 209 is disposed in the first cavity 201f; the plug tail tube 210 is screwed to the threaded connection part 201g and holds the plug tube 209 between the plug tail tube 210 and the optical fiber ceramic ferrule 203.

[0182] In this embodiment, the rear end of the plug body 201 extends integrally to the plug tail tube 210 and is connected to the plug tail tube 210 by screwing, thereby ensuring a firm connection between the optical cable and the connector body structure. The connector body structure and the optical cable 215 are sealed by a heat shrink tubing 216, so that the optical cable 215 and the connector body form a reliable seal.

[0183] It is understandable that, since the threaded connection is the plug tail tube 210, when it is screwed, it will drive the plug middle tube 209 to move linearly. Therefore, the plug middle tube 209 will not generate torsional force to transmit torque to the fiber ceramic ferrule 203 and affect optical performance.

[0184] In a specific implementation, the fiber optic ceramic ferrule 203 is provided with a ceramic ferrule buffer spring 217 on the side near the first cavity 201f, and the plug tube 209 abuts against the ferrule buffer spring 217. In this embodiment, since the plug body 201 has a segmented cavity, the front cavity passes through the fiber optic ceramic ferrule 203, and the rear cavity (first cavity 201f) is used to accommodate the plug tube 209. The plug tube 209 abuts against the ceramic ferrule buffer spring 217 and is provided with a second cavity 209a to allow the ferrule tail to pass through. Since the plug tube 209 is pushed by the plug tail tube 210 to move linearly, the installation method of the plug tube 209 does not require a twisting operation, and will not cause the ceramic ferrule buffer spring 217 to twist and transmit torque to the fiber optic ceramic ferrule 203, thus affecting the optical performance.

[0185] Furthermore, since the ferrule fixing part 201d, the threaded connection part 201g, and the plug body 201e are an integral extended structure, and the structure of the ceramic ferrule buffer spring 217 is contained within the cavity of the plug body 201, sealing is not required during the assembly of the ferrule fixing part 201d and the plug body 201e, thereby reducing the number of sealing points. This effectively solves the problems of the current plug body 201 having a large number of parts, complex assembly process, increased failure risk due to excessive sealing points, and high cost.

[0186] Furthermore, in one embodiment, the plug tube 209 has a radially extending first step 209b at the end near the fiber optic ceramic ferrule 203. The first step 209b serves two purposes: firstly, it abuts against the ceramic ferrule buffer spring 217; secondly, it constrains the ferrule tail of the fiber optic ceramic ferrule 203, ensuring coaxiality when the optical fiber and the fiber optic ceramic ferrule 203 are connected.

[0187] Furthermore, in one embodiment, the plug tail tube 210 is also used to fix the optical cable 215. Specifically, an aluminum cup 213 is provided at the end of the plug tail tube 210 away from the plug tube 209. The aluminum cup 213 is partially sleeved on the plug tail tube 210 and is used to fix the optical cable 215. Preferably, the plug tail tube 210 includes a first part with threads and a second part with protrusions, and the aluminum cup 213 is sleeved on the second part.

[0188] Furthermore, in one embodiment, the optical cable 215 further includes an optical fiber 202; the plug tube 209 is provided with a second cavity 209a, the second cavity 209a accommodates the optical fiber 202, and the inner wall of the second cavity 209a is spaced apart from the optical fiber 202.

[0189] It is worth noting that the second cavity 209a is a cavity with a certain radial and axial space, allowing the optical fiber to form a micro-bend within it. Since the ferrule will retract slightly during connector mating, and to accommodate the fiber retraction during long-term use of the tight-packed optical cable, the optical fiber inside the connector cannot be in a taut state; a slight bend is preferable. Therefore, to ensure good performance of the pre-connected product, this embodiment includes a second cavity 209a to allow the optical fiber to form a micro-bend within it.

[0190] Furthermore, in one embodiment, the plug tube 209 is not threaded to the plug body 201. This prevents damage to the inner wall of the plug tube 209 when the plug body 201 moves. Additionally, the outer surface of the plug tube 209 fits snugly against the inner wall of the plug body 201, thus preventing the plug tube 209 from wobbling within the plug body 201.

[0191] Furthermore, in one embodiment, the outer surface of the plug body 201e is provided with a second step 201h, and a first sealing ring 201i is provided between the second step 201h and the threaded connection portion 201e.

[0192] Furthermore, in one embodiment, the plug body 201 has an insertion structure 201j at one end where the ferrule fixing part 201d is provided. The insertion structure 201j is integrally formed by the plug body 201e extending away from the first cavity 201f. The fiber optic ceramic ferrule 203 is partially disposed in the insertion structure 201j. The cross-section of the insertion structure 201j is circular, and there is a hollow space between the insertion structure 201j and the fiber optic ceramic ferrule 203.

[0193] This application does not use the SC plug body (standard white), thus allowing for a sealing structure to be set at the front end of the plug body 201, and also facilitating the integrated extension of the plug body 201 to the plug tail tube 210. Simultaneously, it reduces the number of parts and lowers costs.

[0194] Furthermore, in one embodiment, the end of the plug body 201 is provided with a sealing ring groove, a locking groove, and a positioning structure in sequence along the axial direction. Specifically, the outer front end of the plug body 201 is provided with an O-ring 208, an annular groove 207, and a positioning key 201k in sequence. The top of the annular groove 207 is higher than the top of the sealing ring groove, and the bottom of the positioning key structure is connected to the cylindrical surface extending from the top of the annular groove 207. This ensures that the sealing ring is not scratched by the limiting structure before it falls into the sealing position during the process of inserting the connector into the adapter.

[0195] Since the connector has a positioning key 201k and the positioning key 201k is located behind the annular groove 207, the adapter can have a directional limiting groove 103 set on its outer side, so that the limiting function can be completed without a separate limiting part, and it is easy to manufacture.

[0196] See Figure 15 The figure illustrates an embodiment where connector 2 and adapter 1 are mated. As shown, after connector 2 and adapter 1 are mated, the outer sleeve 105 of adapter 1 presses the steel ball 104 into the annular groove 207 of connector 2 via the inclined surface 111 of its inner wall, thus locking it in place. The steel ball 104 engages with the annular groove 207 of connector 2, preventing movement between adapter 1 and connector 2, thereby achieving a locking effect with reliable locking force. Corresponding to connector 2, adapter body 101 is provided with a directional section, a locking section, and a sealing section sequentially along the axial direction. The radial dimensions of the directional section, locking section, and sealing section decrease sequentially.

[0197] See Figure 16 The illustration shows an embodiment of a protective cap 4, which has a ring-shaped structure at its left end for securing the fiber optic cable to a traction rope or other traction tool in a duct. See also Figure 17 As shown in the figure, the protective cap 4 is fitted onto the connector 2. As shown in the figure, the protective cap 4 and the plug sleeve 205 of the connector 2 are connected by threads, and threadlocker is added to the threads to ensure a firm and waterproof connection.

[0198] See Figure 18 The figure shows an embodiment of a protective plug 3. As shown, the protective plug 3 has the same push-out device 206, an annular groove 207, and O-ring seal 208 as the connector 2 described above. See also... Figure 19As shown in the figure, this is an embodiment in which the protective plug 3 is inserted into the adapter 1. As shown in the figure, after the protective plug 3 is inserted into the adapter 1, the pushing device 206 of the protective plug 3 pushes the inner sleeve 106 of the adapter 1, thereby causing the outer sleeve 105 of the adapter 1 to slide in the insertion direction. The inclined surface 111 of its inner sidewall presses the steel ball 104 into the annular groove 207 of the protective plug 3 and locks it in place. The steel ball 104 and the annular groove 207 of the protective plug 3 cooperate, so that the adapter 1 and the protective plug 3 cannot move, thereby achieving the effect of locking and fastening, and the locking force is reliable.

[0199] This invention is not limited to the above-described embodiments. For those skilled in the art, several improvements and modifications can be made without departing from the principle of this invention, and these improvements and modifications are also considered to be within the scope of protection of this invention.

[0200] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

Claims

1. A connector for optical fiber connections, characterized by, The connector comprises: a plug body (201) comprising a plug main body (201e) provided with a first cavity (201f), a ferrule fixing portion (201d) and a threaded connecting portion (201g), the ferrule fixing portion (201d) and the threaded connecting portion (201g) being respectively located at both ends of the plug main body (201e) and integrally arranged with the plug main body (201e), and a fiber ceramic ferrule (203) being arranged at the ferrule fixing portion (201d); a plug middle tube (209) arranged in the first cavity (201f); a plug tail tube (210) screwed to the threaded connecting portion (201g) and abutting the plug middle tube (209) between the plug tail tube (210) and the fiber ceramic ferrule (203); the fiber ceramic ferrule (203) being provided with a ceramic ferrule buffer spring (217) on a side close to the first cavity (201f), and the plug middle tube (209) abutting the ferrule buffer spring (217); the connector further being connected with an optical cable (215), and the plug tail tube (210) being used for fixing the optical cable (215); the optical cable (215) further being provided with a heat shrink tube (216), and the heat shrink tube (216) being used for sealing gaps in the connector; the optical cable (215) further comprising an optical fiber (202); the plug middle tube (209) being provided with a second cavity (209a) for accommodating the optical fiber (202), and an inner wall of the second cavity (209a) being spaced apart from the optical fiber (202).

2. The connector of claim 1, wherein: an end of the plug middle tube (209) close to the fiber ceramic ferrule (203) is provided with a first step (209b) extending in a radial direction.

3. The connector of claim 1, wherein: an end of the plug tail tube (210) away from the plug middle tube (209) is provided with an aluminum cup (213), the aluminum cup (213) being partially sleeved on the plug tail tube (210) and being used for fixing the optical cable (215).

4. The connector of claim 3, wherein: the plug tail tube (210) comprises a first portion provided with threads and a second portion provided with a protrusion, and the aluminum cup (213) is sleeved outside the second portion.

5. The connector of claim 4, wherein: the heat shrink tube (216) covers the second portion.

6. The connector of claim 1, wherein: The one end of the plug body (201) provided with the ferrule fixing part (201d) is also provided with an insertion structure (201j), the insertion structure (201j) is integrally extended from the plug main body (201e) to the direction away from the first cavity (201f), the fiber ceramic ferrule (203) is partially arranged in the insertion structure (201j), the cross section of the insertion structure (201j) is circular, and the insertion structure (201j) and the fiber ceramic ferrule (203) are hollow.

7. The connector of claim 1, wherein: The plug middle tube (209) is not threadedly connected with the plug body (201).

8. The connector of claim 7, wherein: The outer surface of the plug middle tube (209) is attached to the inner wall of the plug body (201).

9. The connector of claim 1, wherein: The end of the plug body (201) is sequentially provided with a sealing ring groove, a locking groove and a positioning structure in the axial direction.

10. The connector of claim 9, wherein: The top of the locking groove is higher than the top of the sealing ring groove, and the bottom of the positioning structure is connected with the extension surface of the top of the locking groove.

11. A connector for optical fiber connections, characterized by It comprises: The main body part (201a) is provided with a cavity (201b); The optical cable (215) is arranged on the main body part (201a) and extends into the cavity (201b); The insertion part (201c) is located at one end of the main body part (201a), the insertion part (201c) is provided with a fiber ceramic ferrule (203) at the end away from the main body part (201a), and the insertion part (201c) is provided with a groove for clamping an adapter of the connector; The insertion part (201c) is provided with a pushing device (206) on the periphery, and the pushing device (206) is used for pushing the inner sleeve (106) of the adapter matched with the connector; The optical cable (215) is also provided with a heat shrink tube (216), and the heat shrink tube (216) is used for sealing the gap in the connector; The optical cable (215) further comprises an optical fiber (202); The insertion part (201c) is provided with a second cavity (209a), the second cavity (209a) contains the optical fiber (202), and the inner wall of the second cavity (209a) is spaced apart from the optical fiber (202).

12. An adapter for fiber optic connections, characterized by, It comprises: The adapter body (101) is at least one end of the cylindrical butt joint part (40), the butt joint part (40) is provided with a butt joint channel (101a), the adapter body (101) is provided with a ferrule receiving seat (42) for containing a fiber ceramic ferrule (203), and the butt joint part (40) is provided with a receiving groove (101b) in communication with the butt joint channel (101a); The clamping body is movably contained in the receiving groove (101b). An outer sleeve (105) movably sleeved outside the docking portion (40), the outer sleeve (105) having a first state and a second state, when the outer sleeve (105) is in the first state, the outer sleeve (105) abuts against the clamping body, and part of the clamping body is extended into the docking channel (101a) irreversibly, when the outer sleeve (105) is in the second state, the outer sleeve (105) is provided with a space (101c) between the opening of the accommodating groove (101b) and the outer sleeve (105) for the clamping body to exit the docking channel (101a); An inner sleeve (106) movably arranged in the docking portion (40), the inner sleeve (106) used to keep the outer sleeve (105) in the first state after being pushed in the insertion direction; The adapter body (101) is sequentially provided with a directional section, a locking section and a sealing section along the axial direction, the radial dimensions of the directional section, the locking section and the sealing section are sequentially reduced, the directional section is a directional limiting groove (103) provided on the inner side wall of the adapter body (101), the directional limiting groove (103) is used to be matched with the directional limiting protrusion (204) of the connector to be docked, and the accommodating groove (101b) is located on one side of the directional limiting groove (103) close to the ferrule accommodating seat (42).

13. A quick plug optical fiber connection assembly comprising an adapter (1) and a connector (2), characterized in that, The adapter (1) comprises: An adapter body (101), at least one end of the adapter body (101) being a cylindrical docking portion (40), the docking portion (40) being provided with a docking channel (101a), the adapter body (101) being provided with a ferrule accommodating seat (42) for accommodating an optical ceramic ferrule (203), the ferrule accommodating seat (42) being located in the middle of the adapter body (101), and the docking portion (40) being provided with an accommodating groove (101b) in communication with the docking channel (101a); A clamping body movably accommodated in the accommodating groove (101b); An outer sleeve (105) movably sleeved outside the docking portion (40), the outer sleeve (105) having a first state and a second state, when the outer sleeve (105) is in the first state, the outer sleeve (105) abuts against the clamping body, and part of the clamping body is extended into the docking channel (101a) irreversibly, when the outer sleeve (105) is in the second state, the outer sleeve (105) is provided with a space (101c) between the opening of the accommodating groove (101b) and the outer sleeve (105) for the clamping body to exit the docking channel (101a); An inner sleeve (106) movably arranged in the docking portion (40), the inner sleeve (106) used to keep the outer sleeve (105) in the first state after being pushed in the insertion direction; The connector (2) comprises: A plug body (201) is in butt joint with the adapter body (101), the plug body (201) comprises a plug main body (201e) provided with a first cavity (201f), a plug core fixing part (201d) and a threaded connecting part (201g), the plug core fixing part (201d) and the threaded connecting part (201g) are respectively located at both ends of the plug main body (201e) and are integrally arranged with the plug main body (201e), and a fiber ceramic plug core (203) is arranged at the plug core fixing part (201d); A plug middle tube (209) is arranged in the first cavity (201f); A plug tail tube (210) is screwed on the threaded connecting part (201g) and abuts the plug middle tube (209) between the plug tail tube (210) and the fiber ceramic plug core (203); The fiber ceramic plug core (203) is provided with a ceramic plug buffer spring (217) on the side close to the first cavity (201f), and the plug middle tube (209) abuts the plug buffer spring (217); The connector is further connected with an optical cable (215), and the plug tail tube (210) is used for fixing the optical cable (215); The optical cable (215) is further provided with a heat shrink tube (216), and the heat shrink tube (216) is used for sealing the gap in the connector; The optical cable (215) further comprises an optical fiber (202); The plug middle tube (209) is provided with a second cavity (209a), the second cavity (209a) accommodates the optical fiber (202), and the inner wall of the second cavity (209a) is spaced apart from the optical fiber (202).

14. A quick plug optical fiber connection assembly comprising an adapter (1) and a connector (2), characterized in that, The adapter (1) comprises: An adapter body (101), at least one end of the adapter body (101) is a cylindrical butt joint part (40), the butt joint part (40) is provided with a butt joint channel (101a), the adapter body (101) is provided with a plug core accommodating seat (42) for accommodating a fiber ceramic plug core (203), the plug core accommodating seat (42) is located in the middle part of the adapter body (101), and the butt joint part (40) is provided with an accommodating groove (101b) in communication with the butt joint channel (101a); A clamping body movably accommodated in the accommodating groove (101b); An outer sleeve (105) movably sleeved outside the butt joint part (40), the outer sleeve (105) has a first state and a second state, when the outer sleeve (105) is in the first state, the outer sleeve (105) abuts the clamping body, and part of the clamping body is irretrievably extended into the butt joint channel (101a), when the outer sleeve (105) is in the second state, a space (101c) is provided between the outer sleeve (105) and the opening of the accommodating groove (101b) for the clamping body to exit the butt joint channel (101a). An active sleeve (106) is arranged in the inner sleeve (106) of the docking portion (40), and the inner sleeve (106) is used to maintain the outer sleeve (105) in the first state after being pushed in the insertion direction; The connector (2) comprises: A main body portion (201a) provided with a cavity (201b); An optical cable (215) arranged in the main body portion (201a) and extending into the cavity (201b); An insertion portion (201c) arranged at one end of the main body portion (201a), and a fiber ceramic ferrule (203) is arranged at the end of the main body portion (201a) away from the insertion portion (201c), and a groove is arranged on the insertion portion (201c) for adapter clamping of the connector; The insertion portion (201c) is provided with a pushing device (206) on the periphery, and the pushing device (206) is used to push the inner sleeve (106) of the adapter matched with the connector; meanwhile, When the connector (2) is inserted into the adapter (1), the pushing device (206) abuts against the inner sleeve (106), and the outer sleeve (105) is maintained in the first state, and part of the clamping body extends into the docking channel (101a) and clamps in the groove; The optical cable (215) is further provided with a heat shrink tube (216), and the heat shrink tube (216) is used to seal the gap in the connector; The optical cable (215) further comprises an optical fiber (202); The insertion portion (201c) is provided with a second cavity (209a), and the second cavity (209a) accommodates the optical fiber (202), and the inner wall of the second cavity (209a) is arranged to be spaced apart from the optical fiber (202).

Images