CN114488417B

CN114488417B - Optical fiber connector and optical fiber connector

Info

Publication number: CN114488417B
Application number: CN202210108344.9A
Authority: CN
Inventors: 胡健; 吴丹; 李秀鹏
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2022-01-28
Filing date: 2022-01-28
Publication date: 2024-03-01
Anticipated expiration: 2042-01-28
Also published as: CN114488417A

Abstract

The application discloses fiber optic connector and fiber optic connector, fiber optic connector includes: a housing, a crimp structure, and a ferrule assembly; wherein the shell is sleeved on the periphery of the core insertion assembly, and the compression joint structure is detachably fixed on the shell; the ferrule assembly comprises a ferrule, a ferrule fixing part, a fiber pressing plate and a sleeve, wherein the ferrule is fixed in the ferrule fixing part, a gap in the axial direction can be formed after the fiber pressing plate and the ferrule fixing part are matched with each other, a hole in the ferrule and the gap are also communicated, the sleeve can be used for moving between a first position and a second position relative to the fiber pressing plate, and when the sleeve is moved to the first position, the extrusion force born by the optical fiber is a first extrusion force; when the sleeve is moved to the second position, the extrusion force born by the optical fiber is the second extrusion force; wherein the first extrusion force is smaller than the second extrusion force. The field assembly of the optical fiber connector is realized.

Description

Optical fiber connector and optical fiber connector

Technical Field

The present disclosure relates to the field of optical communications technologies, and in particular, to an optical fiber connector and an optical fiber connector.

Background

With the development of modern society and the explosion growth of information quantity, the demands of people on network throughput are continuously improved. Optical transmission is becoming a mainstream scheme of modern communications by virtue of its unique characteristics of ultra-high bandwidth, low electromagnetic interference and the like, and particularly, an access network represented by an optical fiber to the home (fiber to the home, FTTH) is being deployed on a large scale.

In the construction of an optical fiber to the home network, an optical line terminal (optical line terminal, OLT) is connected to an optical fiber terminal box (access terminal box, ATB) of a user, and the middle part of the optical fiber terminal box needs to sequentially pass through a feeder section optical cable, a distribution section optical cable and a home entry section optical cable, wherein the home entry section optical cable is used for connecting a fiber dividing box and the optical fiber terminal box, and in the laying process of the home entry section optical cable of the FTTH network, one way is to weld, namely, the optical fiber end of each user is distributed in the fiber dividing box, the optical fiber end of each user and the home entry optical cable are welded in the fiber dividing box by an optical fiber welding machine, and then the home entry optical cable is laid to each user. At the other end of the fiber optic cable, a field splice is also required to be made to connect with each fiber optic terminal box of each home. The method has the problems that special optical fiber welding equipment is needed, the technical requirements on operators are high, and the operation process is complex and inconvenient.

An optical fiber connector capable of being assembled autonomously is already on the market, and a section of optical fiber needs to be embedded in the optical fiber connector. When the optical fiber connector is required to be additionally installed on a construction site, firstly, the external optical cable is stripped to expose the optical fiber, the optical fiber is penetrated into the optical fiber connector, and the optical fiber is butted with the originally pre-buried section of the optical fiber inside the optical fiber connector through the matching liquid, so that the on-site assembly of the optical fiber connector is realized. Because the matching fluid is similar to the reflectivity of the optical fiber, smaller loss can be obtained at the butt joint point. However, the matching liquid is easy to volatilize, and gaps can appear at the butt joint positions of the optical fibers after volatilization, so that the optical stability and the reliability are affected, and once the optical fiber connector is used for a long time, the loss of the optical fiber connector is increased, and the reliability of the optical fiber connector is reduced.

Disclosure of Invention

The embodiment of the application provides an optical fiber connector and an optical fiber connector, so that the optical fiber connector is convenient to plug and play with an adapter outdoors, the operation is simple and quick, the loss of the optical fiber connector is low, and the reliability is high.

In a first aspect, embodiments of the present application provide an optical fiber connector, including: a housing, a crimp structure, and a ferrule assembly; the shell is sleeved on the periphery of the ferrule assembly, and the compression joint structure is detachably fixed on the shell, for example, the compression joint structure is fixed on the shell in a buckling manner; the ferrule assembly comprises a ferrule, a ferrule fixing part, a fiber pressing plate and a sleeve, wherein the ferrule is fixed in the ferrule fixing part, a gap in the axial direction can be formed after the fiber pressing plate and the ferrule fixing part are mutually matched, and the gap and a hole in the ferrule are also through, so that an optical fiber penetrating from a tail sleeve can penetrate through the gap and extend to the hole of the ferrule, the sleeve can be used for moving relative to the fiber pressing plate between a first position and a second position, the first position can be in a state that the optical fiber is mutually extruded by the ferrule fixing part and the fiber pressing plate to the minimum extent, and at the moment, the optical fiber can be pulled by external force in the axial direction; the second position can be a state that the optical fiber is most severely extruded by the ferrule fixing part and the fiber pressing plate, and the optical fiber can be difficult to be pulled by external force or can not be pulled by external force in the axial direction; when the sleeve is moved to the first position, that is, the sleeve is positioned at the first position, a first area can be formed between the sleeve and the fiber pressing plate, and the extrusion force born by the optical fiber is the first extrusion force; when the sleeve is moved to the second position, that is, the sleeve is positioned at the second position of the fiber pressing plate, a second area can be formed between the sleeve and the fiber pressing plate, and the extrusion force born by the optical fiber is the second extrusion force; wherein the first extrusion force is smaller than the second extrusion force.

In this embodiment, the optical fiber connector in this embodiment of the present application uses the ferrule assembly to access the optical fiber, so that the installer can flexibly cut the optical cable with the actually required length according to the customer's needs or the length of the optical cable actually required by the installation site, and the cut optical cable end can be assembled on the installation site. Therefore, the optical cable length of the optical fiber connector in the embodiment can be flexibly set on a construction site, so that the optical cable is saved, and the assembly is convenient and quick. In addition, as the stripped optical fibers such as the rubber cable, the reinforcing piece and the like of the optical cable penetrate into the optical fiber connector from the tail sleeve and directly penetrate through the core component, after the optical fibers are exposed out of the core, the end face of the core can be treated by grinding equipment, so that the use of matching liquid for connecting the optical fibers pre-buried in the optical fiber connector and the optical fibers from an external optical cable can be avoided, the loss of the optical fiber connector assembled on site in the prior art is reduced, the reliability of optical characteristics is improved, and stable and reliable optical butt joint is realized. The sleeve can be located at different positions through the movement of the sleeve inside the ferrule assembly, so that different extrusion forces of the ferrule assembly on the optical fibers inside the ferrule assembly are realized, unlocking or locking of the optical fibers is realized, and the assembly of the optical fiber connector is convenient. In addition, because the optical fiber connector of the ferrule assembly is adopted, the optical fiber connector can be assembled and disassembled on site, if the ferrule assembly or a certain part of the ferrule assembly is damaged in the use process, only the ferrule assembly or a certain part of the ferrule assembly is needed to be replaced, and other parts of the optical fiber connector are not needed to be replaced, so that the later maintenance cost is greatly reduced, and the cost is saved.

In one possible implementation manner, the outer wall of the sleeve of the optical fiber connector is provided with a deflector rod, and then the sleeve is used for moving between the first position and the second position relative to the fiber pressing plate, which may be specifically: the deflector rod is used for moving relative to the fiber pressing plate in the circumferential direction between the first position and the second position. In this embodiment, the shift lever on the sleeve may be shifted by an external force to perform a circumferential movement, i.e. a rotational movement around the fiber pressing plate, so that locking or unlocking of the optical fiber is achieved by adjusting whether the sleeve is in the first position or in the second position.

In one possible implementation manner, a first limit part and a second limit part are arranged on the outer wall of the fiber pressing plate, and a limit matching part is arranged on the inner wall of the sleeve; when the limit matching part is positioned at the first limit part, the sleeve is positioned at a first position of the fiber pressing plate; when the limit matching part is positioned at the second limit part, the sleeve is positioned at the second position of the fiber pressing plate. In this embodiment, since the limit engaging portion located on the ferrule may engage with the first limit portion of the fiber pressing plate, or may engage with the first limit portion of the fiber pressing plate, it is possible to realize whether the ferrule is in the first position or the second position, thereby realizing unlocking or locking of the optical fiber, and further, disassembly or assembly of the optical fiber connector.

In one possible implementation manner, the first limiting portion and the second limiting portion are respectively mutually matched with the structure of the limiting matching portion, for example: the first limiting part and the second limiting part can be in a groove type structure, and the limiting matching part can be in a protruding type structure; or the first limiting part and the second limiting part can be in a protruding structure, and the limiting matching part can be in a groove type structure. In this embodiment, through the mutual cooperation of the structures of the first limiting portion and the second limiting portion and the limiting fitting portion, the sleeve can be located at the first position or the second position, so that unlocking or locking of the optical fiber is achieved, and further, disassembly or assembly of the optical fiber connector can be achieved.

In one possible implementation, the first limit portion and the second limit portion are located in different circumferential directions of the fiber pressing plate. In this embodiment, since the circumferential directions of the first and second limiting portions are different, the limiting fitting portion can be located at the first or second limiting portion by rotating the lever of the sleeve, and the operation is simple and convenient.

In one possible implementation, the housing further comprises a first opening and a second opening, each located on a side of the housing, the first opening and the second opening being in communication; when the optical fiber connector is assembled, the deflector rod slides into the first opening from the second opening, after the optical fiber connector is assembled, the limit matching part is positioned at the first opening, and the size of the first opening in the circumferential direction is larger than that of the second opening in the circumferential direction. In this embodiment, since the size of the first opening in the circumferential direction is greater than the size of the second opening in the circumferential direction, the lever can be shifted or rotated at the first opening, thereby adjusting the position of the sleeve, and further removing or assembling the optical fiber connector.

In one possible implementation, the length of the first opening in the axial direction is greater than the length of the lever in the axial direction. In this embodiment, since the length of the first opening is greater than the length of the lever, it is possible to realize that the lever is located entirely at the first opening.

In a possible implementation, the sleeve is configured to move between a first position and a second position relative to the fiber pressing plate, in particular: the sleeve is configured to move in an axial direction relative to the fiber pressing plate between the first position and the second position. In this embodiment, the sleeve may be drawn by an external force to perform an axial movement, i.e., a linear movement in an axial direction around the fiber pressing plate, so that locking or unlocking of the optical fiber is conveniently achieved by adjusting whether the sleeve is in the first position or the second position.

In one possible implementation manner, the outer wall of the fiber pressing plate is provided with a limit groove and a main limit block, and the sleeve comprises a main sliding block; when the main sliding block is positioned in the limiting groove, the sleeve is positioned at a first position of the fiber pressing plate; when the main sliding block is positioned at the main limiting block, the sleeve is positioned at the second position of the fiber pressing plate. In this embodiment, the main slider position may be matched with the main stopper of the fiber pressing plate, or may be matched with the stopper groove of the fiber pressing plate, so that the sleeve may be in the first position or the second position, so as to unlock or lock the optical fiber, and further, the disassembly or assembly of the optical fiber connector may be implemented.

In one possible implementation manner, a secondary limiting block is further arranged on the outer wall of the fiber pressing plate, and the limiting groove is positioned between the secondary limiting block and the primary limiting block; the sleeve further comprises a slave slider and a limit opening, the limit opening being located between the slave slider and the master slider. In this embodiment, the limit groove is formed by being located between the secondary limit block and the primary limit block; the limiting opening is positioned between the secondary slide block and the main slide block, so that the structure is simple, and the assembly and the disassembly of the optical fiber connector are convenient.

In one possible implementation manner, the crimping structure includes a fixing portion, at least two cantilever beams and a bump structure, the fixing ends of the at least two cantilever beams are connected with the fixing portion, the bump structure is formed on the inner walls of the movable ends of the at least two cantilever beams, and the movable ends of the at least two cantilever beams are used for compressing the optical cable. In this embodiment, the optical cable, particularly the butterfly cable, may be fixed by the cooperation of at least two cantilever beams and bump structures, etc., so as to facilitate the disassembly or assembly of the optical fiber connector.

In one possible implementation, the crimping structure includes a fixing portion, a pressing ring component and a fiber clamping component with a notch, where the pressing ring component includes a protruding component, and when the pressing ring component is sleeved on the fiber clamping component, a reinforcement of the optical cable is located between the fiber clamping component and the pressing ring component, and the protruding component is inserted into the notch, and is used for reducing deformation generated when the fiber clamping component is pressed by the pressing ring component. In this embodiment, the optical cable, particularly the round cable, can be fixed by the cooperation of the pressure ring component and the fiber clamping component with the notch, etc., so that the disassembly or assembly of the optical fiber connector is convenient.

In one possible implementation, the fiber optic connector further includes a boot removably secured to the crimp structure. In this embodiment, the crimping structure is fixed by the boot to complete the assembly of the optical fiber connector.

In one possible implementation, after the boot is secured to the crimp structure, the boot will compress the compression ring component to secure the fiber optic cable. Because the tail sleeve can be of a wedge-shaped structure, in the locking process of the internal thread of the tail sleeve and the external thread of the crimping structure, the tail sleeve gradually extrudes the compression ring component and the crimping structure until the tail sleeve is completely fixed on the crimping structure, so that the optical cable is completely fixed.

In a second aspect, embodiments of the present application provide an optical fiber connector, including a dust cap and an optical fiber connector as in any of the embodiments of the first aspect, wherein the dust cap is inserted into a housing of the optical fiber connector to protect the ferrule.

Drawings

FIG. 1 is a diagram of a network architecture for use herein;

FIG. 2 is a schematic view of the external structure of the optical fiber connector;

FIG. 3 is an exploded view of the fiber optic connector of the present application;

FIG. 4 is a schematic structural view of the housing of FIG. 3 of the present application;

FIG. 5 is a schematic structural view of one of the crimping structures of FIG. 3 in the present application;

FIG. 6 is a schematic structural view of another crimp structure of FIG. 3 in the present application;

FIG. 7 is a schematic view of the press ring assembly of FIG. 6 of the present application;

FIG. 8 is a schematic view of the ferrule holding portion of FIG. 3;

FIG. 9 is a schematic view of the structure of the sleeve of FIG. 3 in the present application;

FIG. 10 is a schematic view of the structure of the fiber pressing plate of FIG. 3 in the present application;

FIG. 11 is a cross-sectional view of the ferrule assembly of the present application with the ferrule in a first position;

FIG. 12 is a cross-sectional view of the ferrule assembly of the present application with the sleeve in a second position;

fig. 13 is a schematic structural view of another ferrule assembly of the optical fiber connector of the present application.

Fig. 14 is a cross-sectional view of an optical fiber connector of the present application with a ferrule in a first position.

FIG. 15 is a cross-sectional view of an optical fiber connector of the present application with a ferrule in a second position.

Detailed Description

The embodiment of the application provides an optical fiber connector and optical fiber connector, this optical fiber connector can assemble at the scene, plug and play, and this optical fiber connector's optical cable length can be in the nimble setting of job site, is favorable to practicing thrift the optical cable, and equipment convenient and fast.

For ease of understanding, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Fig. 1 is a part of an optical network of FTTx, which may be FTTH (fiber to the home ), FTTC (fiber to the curb, fiber to the curb), FTTP (fiber to the premises ), FTTN (fiber to the node or neighborhood, fiber to the node), FTTO (fiber to the office ), FTTSA (fiber to the service area, fiber to the service area), or FTTR (fiber to the room ). Taking the FTTH network as an example, the FTTH includes feeder links 1, 1 as viewed from downstream of a Central Office (CO): n splitter 2, wiring links 3, 1: an m-splitter 4, and at least one branch link 5, in the present application, an optical fiber connector applied to an outdoor environment is suitable for the above-mentioned branch link 5. Although this application is exemplified by one type of network of FTTx architecture, other network architectures are also suitable.

Fig. 2 is a schematic view showing an external structure of optical fiber connector 200, and optical fiber connector 200 includes a housing 201, a crimping structure 202, a boot 203, and a dust cap 204 as a whole from the outside of optical fiber connector 200. Wherein, the housing 201 is detachably fixed on the pressing structure 202, and the pressing structure 202 is detachably fixed on the tail sleeve 203, and specific detachable fixing modes include: such as: the housing 201 and the crimp structure 202 are connected and secured together by a snap fit manner, and the crimp structure 202 and the boot 203 are connected and secured together by a screw fit manner. A dust cap 204 may be inserted into one end of the housing 201 to protect the ferrule, the dust cap 204 being optional.

For ease of understanding, the following description will explain and describe related technical terms related to the optical fiber connector 200 of the present embodiment.

Axial direction: it will be understood that the direction in which the central axis of the optical fiber connector 200 is located is equivalent to the extending direction of the ferrule 205 and the optical cable 206, that is, the direction in which the tail end of the optical fiber located in the housing 201 extends to the front end of the optical fiber and then continues to the front end of the ferrule 205 is equivalent to the extending direction of the housing 201.

Circumferential direction: it is understood that the circumferential direction surrounds the central axis of fiber optic connector 200.

Radial direction: a direction perpendicular to the axial direction.

Sleeve shape: the sleeve-shaped element is sleeved on the outer surface of the strip-shaped object to play roles in protection, reinforcement and fixation or connection, the sleeve-shaped element comprises a cylindrical (or tubular) shell, a hollow space is formed inside the shell, openings are formed in two end faces of the cylindrical (or tubular) shell, and the strip-shaped object can enter or pass through the sleeve-shaped element through the two openings. The sleeve-like element comprises two end faces and an outer surface (which may also be referred to as outer circumferential surface) connected between the two end faces. The axial direction of the sleeve-like member is a direction extending from one end face to the other end face thereof, the circumferential direction thereof is a direction surrounding the outer surface, and the axial direction is a direction extending perpendicularly from the inner surface to the outer surface, and it is understood that the sleeve-like member may be cylindrical, elliptical, rectangular, square-like or cylindrical-like, and the sleeve-like outer surface may have a partial notch for ease of assembly of the optical fiber connector.

The optical fiber connector head may also be referred to as an optical fiber connector plug, or simply a connector, or may also be referred to as an optical fiber connector.

Unlocking of the fiber is when the fiber is in a movable state, such as: the optical fiber can move or displace in the axial direction relative to the shell of the optical fiber connector under the action of external force. The locking of the fiber is such that the fiber is in a significantly inactive state, such as: the optical fiber cannot move or displace in the axial direction relative to the shell of the optical fiber connector under the action of external force, or moves or displaces in the axial direction with smaller amplitude relative to the shell of the optical fiber connector.

Fig. 3 is an exploded view of fiber optic connector 200. As can be seen from the internal structure, fiber optic connector 200 further includes ferrule assembly 220 including ferrule 205 and fiber optic cable 206. In the embodiment of the present application, the ferrule assembly 220 includes a ferrule 205, a spring 207, a ferrule fixing portion 208, a fiber pressing plate 209, and a sleeve 210. Wherein, the housing 201 is sleeved outside the ferrule assembly 220, namely: the ferrule assembly 220 is partially or entirely located within the housing 201, and the crimp structure 202 may also be considered to fit over the exterior of the ferrule assembly 220 when the crimp structure 202 is secured to the housing 201. The housing 201 and the ferrule fixing portion 208 are fitted over the outer side of the ferrule 205, that is: the ferrule 205 is partially or entirely located inside the housing 201 and the ferrule holding portion 208.

Referring to fig. 4, the casing 201 is integrally formed in a sleeve shape, and the casing 201 is integrally formed in a structure, so that the casing 201 is divided into the following parts for convenience of description: the housing main body 2011, the first opening 2012, the second opening 2013 and the first bump 2014, wherein the first opening 2012 and the second opening 2013 are located on the outer side surface of the housing main body 2011, the first opening 2012 and the second opening 2013 are communicated together, and the size of the first opening 2012 in the circumferential direction is larger than the size of the second opening 2013 in the circumferential direction, and the size in the circumferential direction can also be referred to as an opening width in the circumferential direction. The length of the first opening 2012 in the axial direction exceeds the length of the lever 2101 of the sleeve 210 in the axial direction, and the length of the first opening 2012 in the circumferential direction is much greater than the length of the lever of the sleeve 210 in the circumferential direction, such as: the length of the first opening 2012 in the circumferential direction is 1.5 to 3 times the length of the lever 2101 in the circumferential direction; the second opening 2013 may have a length in the circumferential direction that accommodates the lever 2101 such that the lever 2101 is conveniently pushed from the second opening 2013 into the first opening 2012 when the ferrule assembly 220 is inserted into the housing 201. The housing 201 further includes a first end surface 2015 and a second end surface 2016 in an axial direction, wherein the second opening 2013 extends in the axial direction to the first end surface 2015, the ferrule assembly 220 penetrates into the interior of the housing 201 through the first end surface 2015, the ferrule 205 may protrude from the second end surface 2016 or not protrude from the second end surface 2016, and the dust cap 204 may be inserted into the housing 201 from the second end surface 2016 to protect the ferrule from contamination.

The crimp structure 202 may have different structures depending on the shape of the fiber optic cable, such as: the crimp structure 202 for fixing the butterfly-shaped optical cable shown in fig. 5 and the crimp structure 202' for fixing the circular-shaped optical cable shown in fig. 6 are described below, respectively.

Referring to fig. 5, in a first embodiment of the press-fit structure 202, the press-fit structure 202 is integrally formed in a sleeve shape, and the press-fit structure 202 is divided into the following parts for convenience of description: fixing portion 2021, fiber-clamping member 2022, bump structure 2023, clamping groove 2024, and screw thread 2025. The fixing portion 2021, the fiber clamping member 2022, the bump structure 2023, the clamping groove 2024 and the thread 2025 are sequentially connected together, and the fixing portion 2021 may be a sleeve-shaped structure, and the fiber clamping member 2022 is specifically at least two cantilever beams 20221. The clamping groove 2024 is located on the fixing portion 2021, and the first protrusion 2014 on the housing 201 is inserted into the clamping groove 2024 of the pressing structure 202, so that the pressing structure 202 is fixed on the housing 201, and the fixing portion 2021 may be two-piece, so that when the pressing structure 202 is inserted into the housing 201, the fixing portion 2021 may have elasticity to expand the diameter of the fixing portion 2021 until the first protrusion 2014 is inserted into the clamping groove 2024. The fixed ends of the two cantilever beams 20221 are connected to the fixed portion 2021, and bump structures 2023 are disposed on inner walls of the movable ends of the two cantilever beams 20221, and the number of bump structures 2023 is not limited specifically herein. The two cantilever beams 20221 are disposed opposite to each other, and the structures of the two cantilever beams 20221 may be the same or slightly different, and the cantilever beams 20221 are elastic. The screw 2025 is located on the side of the fixing portion 2021 near the cantilever beams 20221, the inner cavity of the tail sleeve 203 may be slightly smaller than the outer periphery formed by the two cantilever beams 20221 in a natural state, so that during screwing of the internal screw thread on the tail sleeve 203 and the screw 2025 on the fixing portion 2021, the movable ends of the two cantilever beams 20221 are pressed towards the direction of the optical cable 206 to clamp and fix the optical cable 206, and the bump structure 2023 may increase the tensile property of the optical cable 206. Because the fiber optic cable 206 is coupled to the ferrule assembly 220 and the fiber optic cable 206 is compressed by the crimp structure 202, the ferrule assembly 220 is prevented from moving axially back and forth. It should be noted that the press-connection structure 202 may include a greater number of cantilever beams 20221, such as three, four, etc., and is not limited herein.

Fig. 6 is a schematic diagram of a second embodiment of a crimping structure, such as crimping structure 202', which is similar to crimping structure 202, and the structure and location of the securing portion, the clamping groove, and the threads of crimping structure 202' are the same as the structure and location of the securing portion, clamping groove, and threads of crimping structure 202. The structure of the fiber clamping member 2022 'is different from that of the fiber clamping member 2022, and the fiber clamping member 2022' has a sleeve-like structure with a notch 2026. The press-fit structure 202 'further includes a press-fit member 211 as shown in fig. 7, the press-fit member 211 is also a sleeve-shaped structure, and the protrusion member 2111 is provided on the inner wall of the press-fit member 211, and when the press-fit member 211 is sleeved on the fiber-clamping member 2022', the protrusion member 2111 is inserted into the notch 2026. Specifically, the protruding member 2111 may be one bump. The process of co-securing the cable with the crimp structure 202' and the boot 203 is as follows: when the round cable enters the crimping structure, the rubber-covered wire of the round cable is stripped to expose reinforcing members such as aramid fibers, the reinforcing members are placed on the outer side face of the fiber clamping component 2022', and after the compression ring component 211 is sleeved on the fiber clamping component 2022', the reinforcing members are fixed between the compression ring component 211 and the fiber clamping component 2022 '. Further, since the tail sleeve 203 may be wedge-shaped, the inner diameter of the tail sleeve 203 near the thread is larger than the inner diameter far from the thread, when the internal thread on the tail sleeve 203 is screwed with the external thread 2025 on the fixing portion 2021, the tail sleeve 203 further presses the pressing ring component 211, and the protruding component may be used to reduce the deformation generated when the fiber clamping component is pressed by the pressing ring component. Since the protruding part 2111 can be used to sufficiently fill the notch 2026 from the circumferential direction, the press ring part 211 does not deform or only slightly deforms the fiber clamping part 2022 'due to the notch during the pressing, so that the strength member between the press ring part 211 and the fiber clamping part 2022' is further fastened, and the optical cable 206 near the boot will be fixed as the strength member is fastened. Because the fiber optic cable 206 is coupled to the ferrule assembly 220 and the fiber optic cable 206 is compressed by the crimp structure 202, the ferrule assembly 220 is prevented from moving axially back and forth.

The ferrule assembly 220 is further described below, and when the optical fiber connector 200 is assembled successfully, the ferrule 205 is fixed in the ferrule fixing portion 208, and the platen 209 and the ferrule fixing portion 208 are engaged with each other, for example, the platen 209 and the ferrule fixing portion 208 are engaged with each other. The press-fit plate 209 and the ferrule fixing portion 208 may be cooperatively formed with a gap in the axial direction, and the shape of the gap may be a hole, a cylindrical shape, a conical shape, or the like, without limitation. The fiber optic cable is threaded into fiber optic connector 200 from boot 203, crimp structure 202, and ferrule assembly 220 in sequence in the axial direction. The fiber optic cable of the embodiments of the present application may take different forms for penetrating into fiber optic connector 200 at different locations, such as: the optical cable in the boot 203 may include a stripped cable and a cabled cable; the fiber optic cable in the crimp structure 202 may include a stripped fiber optic cable and a coated optical fiber; the optical cable in the ferrule assembly 220 may be coated optical fibers and uncoated optical fibers (which may also be referred to as optical fibers or bare fibers), and the optical cable between the ferrule fixing portion 208 and the platen 209 and the optical cable in the ferrule 205 are both uncoated optical fibers (hereinafter simply referred to as optical fibers). In the ferrule assembly 220, the optical fibers extend through the gap between the mated ferrule plate and the ferrule fixing portion and into the ferrule. The sleeve 210 and the fiber pressing plate 209 can move relatively, and the movement of the sleeve 210 relative to the fiber pressing plate 209 can enable the optical fibers to bear different pressing forces, so that unlocking or locking of the optical fibers can be achieved. When the sleeve is positioned at the first position of the fiber pressing plate after the sleeve moves relatively to the wire pressing plate, a first area is formed between the inner wall of the sleeve and the outer side of the fiber pressing plate, the extrusion force born by the optical fiber is the first extrusion force, and the optical fiber is in an unlocking state; when the sleeve is positioned at the second position of the fiber pressing plate after the sleeve moves relatively to the wire pressing plate, a second area is arranged between the inner wall of the sleeve and the outer side of the fiber pressing plate, the extrusion force born by the optical fiber is the second extrusion force, and the optical fiber is in a locking state; wherein the first region and the second region are different, and the first extrusion force is less than the second extrusion force. Specifically, the sleeve 210 as depicted in FIG. 9 may be moved circumferentially relative to the platen 209 as depicted in FIG. 10, as described in more detail below. The sleeve 210 'as depicted in fig. 13 may be axially movable relative to the platen 209' as depicted in fig. 13, as described in more detail below. The ferrule assembly 220 has a variety of different configurations, and generally the configuration and function of the ferrule 205, spring 207 and ferrule holding portion 208 are unchanged, but the platen 209 and sleeve have a variety of different configurations.

Fig. 8 is a schematic structural diagram of the ferrule fixing portion 208, where the ferrule fixing portion 208 is integrally formed in a sleeve shape, and the ferrule fixing portion 208 is integrally formed and divided into the following parts for convenience of description: a first end 2081, a connecting portion 2082, a press fit portion 2083, and a second end 2084. Wherein, the first end 2081, the connecting portion 2082, the press-fit portion 2083, and the second end 2084 are sequentially connected together, and the first end 2081 and the second end 2084 may be sleeve-shaped structures. The top surface of the connecting portion 2082 far from the first end 2081 is provided with a third opening 2085, and in the embodiment of the present invention, the structure of the press-fit portion 2083 is not limited, as shown in fig. 8, the press-fit portion 2083 has a multi-step shape, or a shape of a plurality of grooves, and the press-fit portion may also have a shape of a plurality of gears.

The ferrule 205 may be fixed in the inner cavity of the core fixing portion 208, and the fixing manner is not limited herein: such as by staking, further such as: the inner cavity of the lock pin fixing part is provided with a boss, one end of the lock pin is fixed on the boss, and the lock pin fixing part are integrally designed. One end of the spring 207 can be fixed on the sleeve of the second end 2084, the other end of the spring 207 can be propped against the compression joint structure 202, a boss is arranged in the inner cavity of the compression joint structure 202 and can prop against the spring 207, so that in the process of inserting the optical fiber connector into the adapter, the compression joint structure 202 is driven to apply pressure to the spring 207 by applying thrust to the tail sleeve 203, and the elastic force of the spring 207 enables the ferrule assembly 220 to move slightly on the adapter along the axial direction, and the insertion and the extraction between the optical fiber connector and the adapter are facilitated.

Next, the first type of structure of the sleeve 210 and the fiber-pressing plate 209 will be described.

Fig. 9 is a schematic structural view of a sleeve 210, the sleeve 210 has a sleeve shape, a lever 2101 is disposed on an outer wall of the sleeve 210 along an axial direction, the lever 2101 is near a ferrule, and the lever 2101 is a strip-shaped bump. When the mating of the fiber pressing plate 209 and the ferrule holding portion 208 is completed, the sleeve 210 penetrates from the tail of the second end 2084 of the ferrule holding portion to a default position, which is located at the first opening of the housing in the axial direction. The inner wall of the sleeve 210 is provided with a limit matching portion 2102, and the matching relationship between the limit matching portion 2102 and the fiber pressing plate 209 is described in detail in the next section, which will not be described further herein.

As shown in fig. 10, the platen 209 may be an integrated structure, and the ferrule fixing portion 208 is divided into the following portions for convenience of description: the pressing portion 2091, the first engaging portion 2092, the second engaging portion 2093, the first limiting portion 2094, and the second limiting portion 2095. The first buckling portion 2092 and the second buckling portion 2093 are connected together to form a main body of the fiber pressing plate 209, the pressing portion 2091 is located on an inner side surface of the fiber pressing plate 209 (specifically, the second buckling portion 2093), and the first limiting portion 2094 and the second limiting portion 2095 are located on an outer side surface of the fiber pressing plate 209 (specifically, the second buckling portion 2093). The first limit portion 2094 and the second limit portion 2095 are shaped and limit engaging portions 2102 are engageable with each other. As shown in fig. 11, when the lever 2101 is rotated by an external force in the second opening of the housing 201 to be away from the first opening, the limit fitting portion 2102 is located at the first limit portion 2094 (i.e., the sleeve 210 is located at the first position of the fiber pressing plate 209), and a first area may be formed between the inner wall of the sleeve 210 and the outer wall of the fiber pressing plate 209, and when the optical fiber receives a first pressing force from the pressing force between the fiber pressing plate and the ferrule fixing portion. As shown in fig. 12, when the lever 2101 is rotated by an external force in the second opening of the housing 201 to approach the first opening, the limit fitting portion 2102 is located at the second limit portion 2095 (i.e., the sleeve 210 is located at the second position of the fiber pressing plate 209), and a second area may be formed between the inner wall of the sleeve 210 and the outer wall of the fiber pressing plate 209, where the optical fiber receives a second pressing force from the space between the fiber pressing plate and the ferrule fixing portion, and the space of the first area is significantly larger than that of the second area, as shown in fig. 11 and 12, and the two are different, and the first pressing force is smaller than the second pressing force. Specifically: there is no interference between the first limiting portion 2094 and the limiting mating portion 2102, so when the limiting mating portion 2102 is located at the first limiting portion 2094, the optical fiber located in the ferrule assembly is not extruded or has a small extrusion degree, the optical fiber located in the ferrule assembly is subjected to a small pressure, and the optical fiber located in the ferrule assembly is movable at this time, that is, the optical fiber located in the ferrule assembly is in an unlocked state. The second limiting portion 2095 interferes with the limiting mating portion 2102, so when the limiting mating portion 2102 is located at the second limiting portion 2095, the optical fiber located at the ferrule assembly is extruded, the pressure born by the optical fiber located at the ferrule assembly is relatively high, and the optical fiber located at the ferrule assembly is not movable, i.e., the optical fiber located at the ferrule assembly is in a locked state. The specific shapes of the first limiting portion 2094, the second limiting portion 2095, and the limiting mating portion 2102 may be various, such as: the first limiting portion 2094 and the second limiting portion 2095 are specifically in a groove structure, and at this time, the limiting matching portion 2102 is in a protruding structure, wherein an arc length of a groove of the first limiting portion 2094 may be greater than an arc length of a groove of the second limiting portion 2095. The first limiting portion 2094 and the second limiting portion 2095 are specifically in a convex structure, and the limiting matching portion 2102 is in a groove structure, wherein the size of the protrusion of the first limiting portion 2094 is larger than that of the protrusion of the second limiting portion 2095. The first limit portion 2094 and the second limit portion 2095 are located in different circumferential directions of the fiber pressing plate. The platen 209 may also include a raised structure 2096. The structure of the pressing portion 2091 is not limited, but the pressing portion 2091 and the press-fit portion 2083 need to be capable of being fitted to each other in the circumferential direction as a unit, that is, the structure of the pressing portion 2091 and the structure of the press-fit portion 2083 are opposite, a gap may be formed in the radial direction after the pressing portion 2091 and the press-fit portion 2083 are fitted to each other, an optical fiber may be inserted into and out of one end face of the gap, and then the optical fiber is inserted into the interior of the ferrule.

Next, the structure of the second bushing and the fiber pressing plate will be described.

As shown in fig. 13, the outer side surface of the fiber pressing plate 209' is provided with a secondary stopper 2091', a primary stopper 2092' and a stopper groove 2093' in this order, and the secondary stopper 2091' and the primary stopper 2092' are of a convex structure, so that the stopper groove 2093' between the secondary stopper 2091' and the primary stopper 2092' can be seen as a groove structure. The outer side of the sleeve 210' is provided with a limit opening 2101', at both ends of the limit opening 2101' are a slave slider 2102' and a master slider 2103', respectively, the slave slider 2102' and the master slider 2103' may be the outer side of the sleeve 210' itself, and the slave slider 2102', the limit opening 2101' and the master slider 2103' are sequentially located on the sleeve in the axial direction. In the assembly process of the optical fiber connector, after the fiber pressing plate 209 'and the ferrule fixing portion 208 are mutually matched, the sleeve 210' may be sleeved between the fiber pressing plate 209 'and the ferrule fixing portion 208, and then the sleeve 210' may be inserted into the cavity of the housing 201 along with the ferrule fixing portion 208. As shown in fig. 14, when the limit opening 2101' is located between the slave slider and the master slider, wherein when the master slider 2103' is pushed and pulled by an external force to the limit groove 2093', that is, the master slider 2103' is located in the limit groove 2093', the ferrule 210' is located at the first position of the fiber pressing plate 209', a first area may be formed between the inner wall of the ferrule 210' and the outer wall of the fiber pressing plate 209', and the optical fiber receives a first pressing force from the space between the fiber pressing plate and the ferrule fixing portion, and in addition, the slave limit block 2091' may be located in the limit opening 2101 '. That is to say: since the slave stop 2091' is located within the stop opening 2101', the slave stop 2091' is in a natural state of not being squeezed; similarly, the main slider 2103' is positioned within the limiting groove 2093' such that the secondary limiting block 2091' does not contact the inner wall of the cavity of the housing 201, and thus the main slider 2103' is also in a natural state of not being compressed, such that the ferrule 210' and the fiber pressing plate 209' are in a natural state of not being compressed, and such that the optical fibers positioned between the ferrule holding portion 208' and the fiber pressing plate 209' are not compressed, and thus the ferrule 210' is free to slide in the axial direction. As shown in FIG. 15, when the master slider 2103 'is pushed and pulled by an external force against the master stop 2092', i.e., the master slider 2103 'is positioned at the slave stop 2092', the ferrule 210 'is positioned at the second position of the fiber pressing plate 209', and a second area is formed between the inner wall of the ferrule 210 'and the outer wall of the fiber pressing plate 209', wherein the optical fiber receives a second pressing force from the fiber pressing plate and the ferrule fixing portion. The slave slider 2102 'may also be located on the slave stop 2091'. That is to say: since the sleeve 210 'has been pushed completely into the ferrule fixing portion 208 on the side close to the ferrule 205, the lower bottom surface is pressed from the upper and lower bottom surfaces of the slider, and the upper bottom surface is partially or completely pressed by the inner side of the housing 201 from the stopper 2091'; the upper and lower bottom surfaces of the main slider are pressed against the main stopper 2091', and the upper bottom surface is partially or entirely pressed against the inside of the housing 201, so that the housing 201 presses the sleeve 210', the sleeve 210 'presses the fiber pressing plate 209', and the optical fibers located between the ferrule fixing portion 208 'and the fiber pressing plate 209' are further pressed against each other. As shown in fig. 14 and 15, the first region includes a space that is larger than the space included in the second region, and the first and second regions are different from each other, and the first pressing force is smaller than the second pressing force. It should be noted that: in some designs of the fiber-pressing plate 209' and the ferrule 210', the secondary stop 2091', the stop opening 2101' and the secondary slide 2102' may be omitted, in which design the primary slide 2103' still slides between the primary stop 2092' and the stop slot 2093' to achieve different positions of the ferrule 210', thereby unlocking or locking the optical fibers.

In the description of the embodiments of the present application, it should be noted that, unless explicitly specified and limited otherwise, the term "connected" should be interpreted broadly, for example, as a fixed connection, as an indirect connection via an intermediary, as an internal connection between two elements or as an interaction relationship between two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to the specific circumstances.

The terms first, second, third and the like in the description and in the claims of the embodiments and in the above-described figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the embodiments of the present application, and are not limited thereto; although embodiments of the present application have been described in detail with reference to the foregoing embodiments, it will be appreciated by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An optical fiber connector, comprising: a housing, a crimp structure, and a ferrule assembly; wherein,

the shell is sleeve-shaped and sleeved on the outer side of the core inserting assembly, and the compression joint structure is detachably fixed on the shell;

the ferrule assembly comprises a ferrule, a ferrule fixing part, a fiber pressing plate and a sleeve, wherein the ferrule is fixed in the ferrule fixing part, a gap is formed after the fiber pressing plate and the ferrule fixing part are matched with each other, an optical fiber penetrates through the gap, and the optical fiber extends into the ferrule through the gap; the sleeve is used for moving relative to the fiber pressing plate between a first position and a second position;

when the sleeve is positioned at the first position, the extrusion force born by the optical fiber is a first extrusion force;

when the sleeve is positioned at the second position, the extrusion force born by the optical fiber is a second extrusion force; wherein the first extrusion force is less than the second extrusion force;

a deflector rod is arranged on the outer wall of the sleeve;

the sleeve is used for moving relative to the fiber pressing plate between a first position and a second position, and specifically comprises the following steps:

the deflector rod is used for moving relative to the fiber pressing plate in the circumferential direction between the first position and the second position;

The outer wall of the fiber pressing plate is provided with a first limit part and a second limit part, and the inner wall of the sleeve is provided with a limit matching part;

when the limit matching part is positioned at the first limit part, the sleeve is positioned at a first position of the fiber pressing plate;

when the limit matching part is positioned at the second limit part, the sleeve is positioned at a second position of the fiber pressing plate;

the first limiting part and the second limiting part are positioned on the outer side surface of the fiber pressing plate and positioned in different circumferential directions of the fiber pressing plate;

the first limiting part and the second limiting part are of groove structures, the arc length of the groove of the first limiting part is larger than that of the groove of the second limiting part, and the limiting matching part is of a protruding structure; or alternatively

The first limiting part and the second limiting part are of a convex structure, the size of the convex of the first limiting part is larger than that of the convex of the second limiting part, and the limiting matching part is of a groove structure;

the fiber pressing plate further comprises a pressing part, wherein the pressing part is positioned on the inner side surface of the fiber pressing plate;

the lock pin fixed part comprises a press fit part, the press fit part is in a multi-step shape, the inner side surface of the fiber pressing plate is matched with the press fit part, the press part is embedded into the press fit part, the press part is matched with the press fit part in the circumferential direction, and a gap is formed between the press part and the press fit part.

2. The fiber optic connector of claim 1, wherein the housing further comprises a first opening and a second opening, the first opening and the second opening each being located on a side of the housing, the first opening and the second opening being in communication;

when the optical fiber connector is assembled, the deflector rod slides into the first opening from the second opening, after the optical fiber connector is assembled, the limit matching part is positioned at the first opening, and the size of the first opening in the circumferential direction is larger than that of the second opening in the circumferential direction.

3. The fiber optic connector of claim 2, wherein a length of the first opening in the axial direction is greater than a length of the lever in the axial direction.

4. A fiber optic connector according to any one of claims 1 to 3, further comprising a boot removably secured to the crimp structure.

5. A fiber optic connector according to any one of claims 1 to 3, wherein the crimping structure comprises a fixed portion, at least two cantilever beams, and a bump structure, the fixed ends of the at least two cantilever beams are connected to the fixed portion, the bump structure is formed on an inner wall of the movable ends of the at least two cantilever beams, and the movable ends of the at least two cantilever beams are used for compressing the optical cable.

6. A connector according to any one of claims 1 to 3, wherein the crimping structure comprises a fixing portion, a press-ring member and a clamp member having a notch, wherein the press-ring member comprises a protrusion member, and when the press-ring member is fitted around the clamp member, a reinforcing member of the optical cable is located between the clamp member and the press-ring member, the protrusion member is inserted into the notch, and the protrusion member is adapted to reduce deformation of the clamp member when the clamp member is pressed by the press-ring member.

7. The fiber optic connector of claim 6, further comprising a boot that, when secured to the crimp structure, will compress the compression ring member to secure the fiber optic cable.

8. An optical fiber connector comprising a dust cap and an optical fiber connector according to any one of claims 1 to 7, wherein the dust cap is inserted into a housing of the optical fiber connector to protect the ferrule.