An adapter and quick plug fiber optic connection assembly

Abstract

The application discloses an adapter and a quick-plug optical fiber connecting assembly, and relates to the field of optical distribution networks.The adapter comprises an adapter body, at least one end of which is provided with a cylindrical docking part, the docking part is provided with a docking channel, the adapter body is provided with a ferrule accommodating seat, the ferrule accommodating seat extends into the docking channel, and a slot is formed between the ferrule accommodating seat and the inner wall of the docking part, the slot is used for accommodating the end of the insertion part of a connector, and the docking part is provided with an accommodating groove in communication with the docking channel; a clamping body is movably accommodated in the accommodating groove and is used for clamping the connector matched with the adapter, and the clamping body is configured to be located behind a sealing structure on the end of the insertion part in the insertion direction after the connector is docked with the adapter. The optical fiber connecting assembly disclosed by the application can conveniently and quickly complete the plug and pull operation of the adapter and the connector, the locking force is reliable, and the problems of inconvenient plug and pull 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 Fiber Optic Connection Assembly". Technical Field

[0002] This invention relates to the field of optical distribution networks, and more specifically to an adapter and a 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 types of 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 an adapter and a 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 an adapter, the adapter comprising:

[0010] The adapter body has a cylindrical docking portion at at least one end, the docking portion having a docking channel, and the adapter body having a ferrule receiving seat for accommodating an optical fiber ceramic ferrule. The docking portion has a connecting section radially inwardly connected to the ferrule receiving seat. The ferrule receiving seat extends into the docking channel, and a slot is formed between the bottom wall of the connecting section, the outer wall of the portion of the ferrule receiving seat extending into the docking channel, and the inner wall of the docking portion. The slot is used to accommodate the end of the insertion portion of a connector that matches the adapter, and the docking portion has a receiving groove communicating with the docking channel.

[0011] A retaining body is movably received within the receiving groove for retaining a connector that matches the adapter. The retaining body is configured such that, after the connector and adapter are mated, the retaining body is located behind the O-ring on the end of the insertion part along the insertion direction.

[0012] In conjunction with the first aspect, in one embodiment, an outer sleeve is movably fitted over the docking portion. 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 irreversibly into the docking channel. When the outer sleeve is in the second state, a clearance space is provided between the outer sleeve and the opening of the receiving groove for the retaining body to exit the docking channel.

[0013] 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.

[0014] In conjunction with the first aspect, in one embodiment, the outer sleeve is provided with a retaining block protruding from the inner wall. When the outer sleeve is in the first state, the retaining block is located at the receiving groove and abuts against the retaining body.

[0015] In conjunction with the first aspect, in one embodiment, the abutment block has an inclined surface on the side near the insert receiving seat.

[0016] In conjunction with the first aspect, in one embodiment, the retaining body includes an elastic arm extending from the docking portion, and a retaining block is provided at the end of the elastic arm; simultaneously,

[0017] When the outer sleeve is in the second state, the elastic arm is in a state of no elastic deformation, and the retaining block is completely received in the receiving groove. When the outer sleeve is in the first state, the outer sleeve abuts against the retaining block, and the retaining block partially extends into the docking channel.

[0018] In conjunction with the first aspect, in one embodiment, the retaining body is a steel ball, the receiving groove is a cylindrical hole, and the bottom of the receiving groove is provided with a stop portion, which is used to prevent the steel ball from falling completely out of the receiving groove.

[0019] Secondly, embodiments of this application provide another adapter, the adapter comprising:

[0020] The adapter body has a cylindrical docking portion at at least one end, the docking portion having a docking channel, and a ferrule receiving seat for accommodating an optical fiber ceramic ferrule. The docking portion has a connecting section radially inwardly connected to the ferrule receiving seat. The ferrule receiving seat extends into the docking channel, and a slot is formed between the bottom wall of the connecting section, the outer wall of the portion of the ferrule receiving seat extending into the docking channel, and the inner wall of the docking portion. The slot is used to accommodate the end of a connector that matches the adapter. The outer wall of the docking portion has an inner spring groove for installing an inner spring. The docking portion has a receiving groove communicating with the docking channel, and the position where the receiving groove communicates with the docking channel is located between the area where the slot is located and the area where the inner spring groove is located.

[0021] A retaining body, which is movably housed within the receiving slot, is used to retain a connector that matches the adapter.

[0022] Thirdly, embodiments of this application provide another adapter, the adapter comprising:

[0023] The adapter body has a cylindrical docking portion at at least one end, the docking portion having a docking channel, and a ferrule receiving seat for accommodating an optical fiber ceramic ferrule. The docking portion has a connecting section radially inwardly connected to the ferrule receiving seat. The ferrule receiving seat extends into the docking channel, and a slot is formed between the bottom wall of the connecting section, the outer wall of the portion of the ferrule receiving seat extending into the docking channel, and the inner wall of the docking portion. The slot is used to accommodate the end of a connector that matches the adapter, and the docking portion has a receiving groove communicating with the docking channel.

[0024] A retaining body is movably housed within the receiving groove for retaining a connector that matches the adapter. The retaining body is spaced apart from the end face of the ferrule receiving seat that extends into the mating channel, with the ferrule receiving seat facing away from the axial direction of the ferrule receiving seat.

[0025] Fourthly, embodiments of this application provide a quick-plug fiber optic connection assembly, the quick-plug fiber optic connection assembly comprising:

[0026] Connector, comprising:

[0027] The main body has a cavity;

[0028] An optical cable is assembled in the main body and extends into the cavity;

[0029] An insertion part is located at one end of the main body. The end of the insertion part away from the main body is provided with an optical fiber ceramic ferrule. The insertion part is provided with an O-ring and a groove for snapping. Along the insertion direction, the groove is located behind the O-ring.

[0030] An adapter, comprising:

[0031] The adapter body has a cylindrical docking portion at at least one end, the docking portion having a docking channel, and the adapter body having a ferrule receiving seat for accommodating an optical fiber ceramic ferrule. The docking portion has a connecting section radially inwardly connected to the ferrule receiving seat. The ferrule receiving seat extends into the docking channel, and a slot is formed between the bottom wall of the connecting section, the outer wall of the portion of the ferrule receiving seat extending into the docking channel, and the inner wall of the docking portion. The slot is used to accommodate the end of the insertion portion of the connector, and the docking portion has a receiving groove communicating with the docking channel.

[0032] A retaining body is movably housed within the receiving groove and is used to engage with the groove.

[0033] In conjunction with the fourth aspect, in one embodiment, the adapter further includes:

[0034] 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.

[0035] 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.

[0036] In conjunction with the fourth aspect, in one embodiment, a pushing device is provided around the insertion part, the pushing device being used to push the inner sleeve of the adapter that is compatible with the connector.

[0037] In conjunction with the fourth aspect, in one embodiment, the pushing device is a pushing block disposed on the outer surface of the insertion portion, or...

[0038] The pushing device is a pushing plate that is spaced apart from the outer surface of the insertion part.

[0039] In conjunction with the fourth aspect, in one embodiment, the groove is an annular groove arranged circumferentially along the insertion portion, or...

[0040] The groove is a hemispherical groove.

[0041] The beneficial effects of the technical solutions provided in this application include:

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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

[0046] Figure 1 This is a schematic diagram of the adapter structure in an embodiment of the present invention;

[0047] Figure 2 for Figure 1 Cross-sectional view along the AA' direction;

[0048] Figure 3 This is a schematic diagram of the connector structure in an embodiment of the present invention;

[0049] Figure 4 for Figure 3 Cross-sectional view along the BB' direction;

[0050] Figure 5 This is a schematic diagram showing the adapter and connector in their pre-dating state.

[0051] Figure 6 This is a schematic diagram showing the adapter and connector in the process of mating and insertion.

[0052] Figure 7 A diagram illustrating the process of preparing the connector to be unplugged from the adapter;

[0053] Figure 8 This is a diagram illustrating the process of the connector being pulled out after the steel ball has been unlocked.

[0054] Figure 9 A schematic diagram showing the structure for adding an O-ring to the connector and a sealing gasket to the adapter;

[0055] Figure 10 This is a schematic diagram of the structure of the protective plug inserted into the adapter;

[0056] Figure 11 A schematic diagram of a protective cap fitted over the connector plug body;

[0057] Figure 12 This is a structural schematic diagram of the "single-end waterproof locking type" adapter in an embodiment of the present invention;

[0058] 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;

[0059] Figure 14 A schematic diagram of a specific embodiment of a connector;

[0060] Figure 15 for Figure 14 A schematic diagram showing the connector and adapter after mating.

[0061] Figure 16 A schematic diagram of a specific embodiment of a protective cap;

[0062] Figure 17 for Figure 16 Medium protective helmet set Figure 14 A schematic diagram of the connector;

[0063] Figure 18 A schematic diagram of a specific embodiment of a protective plug;

[0064] Figure 19 for Figure 18 A schematic diagram of the protective plug being inserted into the adapter;

[0065] Figure 20 This is a schematic diagram of a specific embodiment of a retaining body.

[0066] Figure label:

[0067] 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;

[0068] 2-Connector, 201-Plug body, 201a-Main body, 201b-Cavity, 201c-Insertion part, 201d-Flange fixing part, 202-Fiber optic cable, 203-Fiber optic ceramic ferrule, 204-Orienting limiting protrusion, 205-Plug outer sleeve, 206-Push-up device, 207-Annular groove, 208-O-ring seal, 209-Plug middle tube, 210-Plug tail tube, 211-Aluminum tube, 212-Inner waterproof O-ring seal, 213-Aluminum cup, 214-Fiber optic cable tail sheath, 215-Fiber optic cable, 216-Heat shrink tubing, 217-Ceramic ferrule buffer spring;

[0069] 3-Protective plug; 4-Protective cap; 40-Matching part; 42-Plug housing; 43-Elastic arm; 44-Clamping block. Detailed Implementation

[0070] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0071] Example 1:

[0072] 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.

[0073] Example 2:

[0074] Please also refer to Figures 1 to 19As 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.

[0075] Example 3:

[0076] 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.

[0077] Example 4:

[0078] 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.

[0079] 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.

[0080] Example 5:

[0081] Please also refer to Figures 1 to 19 Specifically, the difference between this embodiment and Embodiment 1 is that the plug body 201 includes:

[0082] The main body 201a has a cavity 201b for connecting the optical cable 215.

[0083] 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.

[0084] 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.

[0085] 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.

[0086] 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.

[0087] Optionally, the groove is an annular groove 207 arranged circumferentially along the insertion portion 201c; or, the groove is a hemispherical groove.

[0088] 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.

[0089] Example 6:

[0090] Please also refer to Figures 1 to 19 The present invention also provides a connector for optical fiber connection, comprising:

[0091] The main body 201a has a cavity 201b.

[0092] An optical cable 215 is assembled in the main body 201a, and the optical cable 215 extends into the cavity 201b;

[0093] 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.

[0094] 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.

[0095] 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.

[0096] 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.

[0097] 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.

[0098] 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.

[0099] Example 7:

[0100] Please refer to Figure 1-19 The present invention also provides an adapter 1 for optical fiber connection, comprising:

[0101] 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.

[0102] The mating portion 40 has a connecting section radially inwardly connected to the ferrule receiving seat 42. The ferrule receiving seat 42 extends into the mating channel 101a, and a slot is formed between the bottom wall of the connecting section, the outer wall of the portion of the ferrule receiving seat 42 extending into the mating channel 101a, and the inner wall of the mating portion 40. The slot is used to accommodate the end of the insertion portion 201c of a connector that matches the adapter. See also Figure 1 As shown, in this embodiment, the slot is defined by the end face of the ferrule receiving seat 42 that extends into the docking channel 101a, and the area to the left of the end face is the slot.

[0103] A retaining body is movably received within the receiving groove 101b for retaining a connector that matches the adapter. The retaining body is configured such that, after the connector and adapter are mated, the retaining body is located behind the O-ring on the end of the insertion portion 201c in the insertion direction.

[0104] Alternatively, the retaining body is positioned axially away from the ferrule receiving seat 42, spaced apart from the end face of the ferrule receiving seat 42 that extends into the docking channel 101a. From the perspective of a slot, the position where the receiving groove 101b connects to the docking channel 101a is not within the slot area, thus achieving a better sealing effect.

[0105] Preferably, the adapter further includes:

[0106] 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.

[0107] 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.

[0108] 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.

[0109] Example 8:

[0110] 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.

[0111] 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.

[0112] 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.

[0113] 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.

[0114] 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.

[0115] 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.

[0116] Example 9:

[0117] 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.

[0118] 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.

[0119] 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.

[0120] 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.

[0121] Example 10:

[0122] 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 second 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.

[0123] 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.

[0124] Example 11:

[0125] 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.

[0126] 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.

[0127] The retaining body is movably housed within the receiving slot 101b;

[0128] 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.

[0129] 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.

[0130] Connector 2 includes:

[0131] The main body 201a has a cavity 201b.

[0132] An optical cable 215 is assembled in the main body 201a, and the optical cable 215 extends into the cavity 201b;

[0133] 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.

[0134] 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.

[0135] 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.

[0136] 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.

[0137] 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 1 As 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.

[0138] 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 4 As 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.

[0139] 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.

[0140] 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.

[0141] 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.

[0142] 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.

[0143] 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.

[0144] 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.

[0145] 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.

[0146] 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.

[0147] To better understand the present invention, the above-mentioned optical fiber connection components will be further described in detail below through several specific embodiments.

[0148] 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:

[0149] 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.

[0150] Fiber optic ceramic ferrules 203 can be divided into UPC and APC according to the polishing method of their end faces;

[0151] 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.

[0152] The plug body 201 has the following features: an O-ring 208 mounting groove, an annular groove 207, and a directional limiting protrusion 204.

[0153] 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.

[0154] The plug tube 209 is used to protect the stripped optical fiber cable.

[0155] 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.

[0156] Fiber 202 is the exposed fiber after the fiber optic cable 215 has been stripped.

[0157] Aluminum tube 211 is used in conjunction with aluminum cup 213 to fix aramid fiber or tensile metal wire inside optical cable 215;

[0158] 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.

[0159] 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.

[0160] 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.

[0161] Fiber optic cable 215;

[0162] Heat shrink tubing 216 is used to seal the gap between the optical cable and the parts after the optical cable is fixed. Its protection performance can reach IP68. IP68 is the highest level of waterproof rating standard for connectors.

[0163] See Figure 15 The figure shows an embodiment where the connector 2 and adapter 1 are mated. As shown in the figure, after the connector 2 and adapter 1 are mated, the outer sleeve 105 of the adapter 1 presses the steel ball 104 into the annular groove 207 of the 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 the connector 2 cooperate, making it impossible for the adapter 1 and the connector 2 to move, thereby achieving the effect of locking and clamping, and the locking force is reliable.

[0164] See Figure 16The 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.

[0165] 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 19 As 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.

[0166] 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.

[0167] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

Claims

1. An adapter, characterized in that, The adapter includes: An adapter body (101) has a cylindrical docking portion (40) at at least one end, the docking portion (40) having a docking channel (101a), and the adapter body (101) having a ferrule receiving seat (42) for accommodating an optical fiber ceramic ferrule (203). The docking portion (40) has a connecting section radially inwardly connected to the ferrule receiving seat (42), the ferrule receiving seat (42) extending into the docking channel (101a), and the bottom wall of the connecting section and the outer wall of the portion of the ferrule receiving seat (42) extending into the docking channel (101a) are connected to the ferrule receiving seat (42). A slot is formed between the inner walls of the mating part (40) for accommodating the end of the insertion part (201c) of the connector that matches the adapter. The mating part (40) is provided with a receiving groove (101b) that communicates with the mating channel (101a). The inner side wall of the adapter body (101) is also provided with a directional limiting groove (103) for matching the directional limiting protrusion (204) of the mating connector. The receiving groove (101b) is located on the side of the directional limiting groove (103) close to the ferrule receiving seat (42). A retaining body is movably received within the receiving groove (101b) for retaining a connector that matches the adapter, and the retaining body is configured such that, after the connector and the adapter are mated, the retaining body is located behind the O-ring on the end of the insertion part (201c) in the insertion direction.

2. An adapter as claimed in claim 1, characterized in that, Also includes: 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) for the retaining body to exit the docking channel (101a). An inner sleeve (106) is movably assembled in the docking part (40), the inner sleeve (106) being used to hold the outer sleeve (105) in a first state after it is pushed in the insertion direction.

3. An adapter as described in claim 2, characterized in that: The outer sleeve (105) is provided with a retaining block (105a) protruding from the inner wall. When the outer sleeve (105) is in the first state, the retaining block (105a) is located at the receiving groove (101b) and abuts against the retaining body.

4. An adapter as described in claim 3, characterized in that: The abutment block (105a) has an inclined surface (111) on the side near the insert receiving seat (42).

5. An adapter as described in claim 2, characterized in that: 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); at the same time, When the outer sleeve (105) is in the second 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).

6. An adapter as claimed in claim 1, characterized in that: The retaining body is a steel ball (104), the receiving groove (101b) is a cylindrical hole, and the bottom of the receiving groove (101b) is provided with a stop part, which is used to prevent the steel ball (104) from falling completely out of the receiving groove (101b).

7. An adapter, characterized in that, The adapter includes: The adapter body (101) has a cylindrical docking portion (40) at at least one end, the docking portion (40) having a docking channel (101a), and the adapter body (101) having a ferrule receiving seat (42) for accommodating an optical fiber ceramic ferrule (203). The docking portion (40) has a connecting section radially inwardly connected to the ferrule receiving seat (42). The ferrule receiving seat (42) extends into the docking channel (101a), and a slot is formed between the bottom wall of the connecting section, the outer wall of the portion of the ferrule receiving seat (42) extending into the docking channel (101a), and the inner wall of the docking portion (40). The slot is used to accommodate a connector that matches the adapter. At the end of the device, the outer wall of the docking part (40) is provided with an inner spring groove for installing the inner spring (108), the docking part (40) is provided with a receiving groove (101b) communicating with the docking channel (101a), the inner side wall of the adapter body (101) is also provided with a directional limiting groove (103), the directional limiting groove (103) is used to adapt to the directional limiting protrusion (204) of the docking connector, the receiving groove (101b) is located on the side of the directional limiting groove (103) close to the ferrule receiving seat (42), and the position where the receiving groove (101b) communicates with the docking channel (101a) is located between the area where the slot is located and the area where the inner spring groove is located; A retaining body, which is movably received within the receiving slot (101b), is used to retain a connector that matches the adapter.

8. An adapter, characterized in that, The adapter includes: An adapter body (101) has a cylindrical docking portion (40) at at least one end, a docking channel (101a) in the docking portion (40), and a ferrule receiving seat (42) for accommodating an optical fiber ceramic ferrule (203). The docking portion (40) has a connecting section radially inwardly connected to the ferrule receiving seat (42), the ferrule receiving seat (42) extending into the docking channel (101a), and the bottom wall of the connecting section and the portion of the ferrule receiving seat (42) extending into the docking channel (101a) are also included. A slot is formed between the outer wall of the adapter body (40) and the inner wall of the mating part (40). The slot is used to accommodate the end of the connector that matches the adapter. The mating part (40) is provided with a receiving groove (101b) that communicates with the mating channel (101a). The inner side wall of the adapter body (101) is also provided with a directional limiting groove (103). The directional limiting groove (103) is used to adapt to the directional limiting protrusion (204) of the mating connector. The receiving groove (101b) is located on the side of the directional limiting groove (103) close to the ferrule receiving seat (42). The retaining body is movably received in the receiving groove (101b) for retaining the connector that matches the adapter, and the retaining body is spaced apart from the end face of the ferrule receiving seat (42) that extends into the docking channel (101a) in a direction axially away from the ferrule receiving seat (42).

9. A quick-plug fiber optic connection assembly, characterized in that, The quick-plug fiber optic connection assembly includes: Connector, comprising: The main body (201a) has a cavity (201b). An optical cable (215) is assembled in the main body (201a), and the optical cable (215) extends into the cavity (201b). An insertion part (201c) is located at one end of the main body (201a). The end of the insertion part (201c) away from the main body (201a) is provided with an optical fiber ceramic ferrule (203). The insertion part (201c) is provided with an O-ring and a groove for snapping. Along the insertion direction, the groove is located behind the O-ring. A directional limiting protrusion (204) is provided on the insertion part (201c), and along the insertion direction, the directional limiting protrusion (204) is located behind the groove; An adapter, comprising: The adapter body (101) has a cylindrical docking portion (40) at at least one end, the docking portion (40) has a docking channel (101a), and the adapter body (101) has a ferrule receiving seat (42) for accommodating an optical fiber ceramic ferrule (203). The docking portion (40) has a connecting section that connects to the ferrule receiving seat (42) radially inward. The ferrule receiving seat (42) extends into the docking channel (101a), and the bottom wall of the connecting section and the ferrule receiving seat (42) extend into the docking channel. A slot is formed between the outer wall of the channel (101a) and the inner wall of the docking part (40), the slot being used to accommodate the end of the insertion part (201c) of the connector, and the docking part (40) is provided with a receiving groove (101b) communicating with the docking channel (101a), and the inner side wall of the adapter body (101) is also provided with a directional limiting groove (103) adapted to the directional limiting protrusion (204), the receiving groove (101b) being located on the side of the directional limiting groove (103) close to the ferrule receiving seat (42); A retaining body is movably housed within the receiving groove (101b) and is used to engage with the groove.

10. A quick-plug fiber optic connection assembly as described in claim 9, characterized in that, The adapter also includes: 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) for the retaining body to exit the docking channel (101a). An inner sleeve (106) is movably assembled in the docking part (40), the inner sleeve (106) being used to hold the outer sleeve (105) in a first state after it is pushed in the insertion direction.

11. A quick-plug fiber optic connection assembly as described in claim 10, characterized in that: The insertion part (201c) is provided with a pushing device (206) around its periphery. The pushing device (206) is used to push the inner sleeve (106) of the adapter that is compatible with the connector.

12. A quick-plug fiber optic connection assembly as described in claim 11, characterized in that: The pushing device (206) is a pushing block provided on the outer surface of the insertion part (201c), or, The pushing device (206) is a pushing piece that is spaced apart from the outer surface of the insertion part (201c).

13. A quick-plug fiber optic connection assembly as described in claim 9, characterized in that: The groove is an annular groove arranged circumferentially along the insertion part (201c), or, The groove is a hemispherical groove.

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