CN114488417A - Optical fiber connector and optical fiber connector - Google Patents

Abstract

The present application discloses an optical fiber connector and an optical fiber connector. The optical fiber connector includes: a shell, a crimping structure and a ferrule assembly; wherein, the shell is sleeved on the periphery of the ferrule assembly, and the crimping structure is detachable The ferrule assembly includes a ferrule, a ferrule fixing part, a fiber pressing board and a sleeve, the ferrule is fixed in the ferrule fixing part, and the fiber pressing board and the ferrule fixing part are mutually After mating, a gap in the axial direction can be formed, and the gap and the hole inside the ferrule are also connected. The sleeve can be used to move relative to the fiber-pressing board between the first position and the second position. When the sleeve is moved to In the first position, the pressing force that the optical fiber bears is the first pressing force; when the sleeve is moved to the second position, the pressing force that the optical fiber bears is the second pressing force; wherein, the The first pressing force is smaller than the second pressing force. Enables field assembly of fiber optic connectors.

Description

Optical fiber connector and optical fiber connector

Technical Field

The application relates to the technical field of optical communication, especially, relate to an optical fiber connector and fiber connector.

Background

With the development of modern society and the explosive increase of information quantity, the demand of people on network throughput capacity is continuously improved. Optical transmission gradually becomes a mainstream scheme of modern communication by virtue of unique characteristics of ultrahigh bandwidth, low electromagnetic interference and the like, and particularly, an access network represented by Fiber To The Home (FTTH) which is a newly-built network at present is being deployed on a large scale.

In the construction of an optical fiber to the home network, an Optical Line Terminal (OLT) to an optical fiber termination box (ATB) of a subscriber needs to pass through a feeder section optical cable, a distribution section optical cable and a home section optical cable in sequence in the middle, wherein the home section optical cable is used for connecting the optical fiber distribution box and the optical fiber termination box, in the distribution process of the home section optical cable of the FTTH network, one way is to perform fusion splicing, that is, an optical fiber end corresponding to each home is distributed in the optical fiber distribution box, the optical fiber end of each home and the home optical cable are fused in the optical fiber distribution box by an optical fiber fusion splicer, and then the home optical cable is laid to each home. At the other end of the fiber optic cable, a field fusion splice is also required to connect with the fiber optic terminal closure of each home. The method has the problems that special optical fiber fusion equipment is needed, the technical requirement on operators is high, and the operation process is complicated and inconvenient.

An optical fiber connector capable of being automatically assembled appears in the market at present, and a section of optical fiber needs to be pre-buried inside the optical fiber connector. When the optical fiber connector needs to be additionally installed on a construction site, the external optical cable is stripped to expose the optical fiber, the optical fiber penetrates into the optical fiber connector, and the optical fiber is connected with the originally pre-embedded section of optical fiber in the optical fiber connector in a butt joint mode through matching fluid, so that the field assembly of the optical fiber connector is achieved. Because the reflectivity of the matching fluid is similar to that of the optical fiber, the loss at the butt joint point can be reduced. However, the matching fluid is easy to volatilize, and a gap appears at the butt joint of the optical fiber after volatilization, so that the optical stability and reliability are affected, and therefore, once the optical fiber connector is used for a long time, the loss of the optical fiber connector becomes large, and the reliability of the optical fiber connector is reduced.

Disclosure of Invention

The embodiment of the application provides an optical fiber connector and optical fiber connector for this optical fiber connector is convenient outdoor plug-and-play with the adapter, and easy operation is swift, and optical fiber connector's loss is lower, and the reliability is higher.

In a first aspect, an embodiment of the present application provides an optical fiber connector, including: the device comprises a shell, a compression joint structure and a core insert 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 mode; 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, the gap and a hole in the ferrule are communicated, so that an optical fiber penetrating from the tail sleeve can penetrate through the gap and extend to the hole of the ferrule, the sleeve can be used for moving between a first position and a second position relative to the fiber pressing plate, the first position can be a state that the mutual extrusion degree of the optical fiber by the ferrule fixing part and the fiber pressing plate is minimum, and the optical fiber can be pulled and pulled by external force in the axial direction; the second position can be a state that the optical fiber is squeezed by the ferrule fixing part and the fiber pressing plate to the most serious degree, and the optical fiber can be difficult to be pulled by external force or can not be pulled by the external force in the axial direction; when the sleeve is moved to the first position, namely the sleeve is located at the first position, a first area can be arranged between the sleeve and the fiber pressing plate, and the optical fiber is subjected to a first pressing force; when the sleeve is moved to the second position, namely the sleeve is positioned at the second position of the fiber pressing plate, a second area can be arranged between the sleeve and the fiber pressing plate, and the optical fiber is subjected to a second extrusion force; wherein the first compressive force is less than the second compressive force.

In this embodiment, the optical fiber connector in the embodiment of the present application, because the ferrule assembly is used to access the optical fiber, an installer can flexibly cut the optical fiber connector according to the needs of a customer or the length of the optical fiber actually required in the installation field to obtain the optical fiber with the actually required length, and the end portion of the cut optical fiber connector can be assembled in the installation field. Therefore, the optical cable length of the optical fiber connector in the embodiment can be flexibly set on a construction site, the optical cable is saved, and the assembly is convenient and fast. In addition, because the stripped optical fibers such as the sheath cable and the reinforcing member of the optical cable penetrate into the optical fiber connector from the tail sleeve and directly penetrate through the ferrule assembly, after the optical fibers are exposed out of the ferrule, the end face of the ferrule can be processed by grinding equipment, so that the optical fibers pre-embedded in the optical fiber connector and the optical fibers from an external optical cable can be prevented from being connected by using matching fluid, 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 pipe can be located at different positions by the movement of the sleeve pipe inside the ferrule assembly, so that different extrusion forces of the ferrule assembly on the optical fiber inside the ferrule assembly are realized, the optical fiber is unlocked or locked, and the assembly of the optical fiber connector is facilitated. In addition, due to the adoption of the optical fiber connector of the ferrule assembly, 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 using process, only the ferrule assembly or the certain part of the ferrule assembly needs to be replaced, and other parts of the optical fiber connector do not need to be replaced, so that the later maintenance cost is greatly reduced, and the cost is saved.

In a possible implementation manner, the outer wall of the sleeve of the optical fiber connector is provided with a shift lever, 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 in the circumferential direction between the first position and the second position relative to the fiber pressing plate. In this embodiment, the poking rod on the sleeve can be poked to move circumferentially by external force, i.e. to rotate around the fiber pressing plate, so that the locking or unlocking of the optical fiber is conveniently realized by adjusting the sleeve to be in the first position or the second position.

In a possible implementation manner, the outer wall of the fiber pressing plate is provided with a first limiting part and a second limiting part, and the inner wall of the sleeve is provided with a limiting matching part; when the limit matching part is positioned at the first limit part, the sleeve is positioned at the first position of the fiber pressing plate; when the limiting matching part is positioned at the second limiting part, the sleeve is positioned at the second position of the fiber pressing plate. In this embodiment, the position-limiting matching portion of the sleeve can be matched with the first position-limiting portion of the fiber pressing plate and also can be matched with the first position-limiting portion of the fiber pressing plate, so that the sleeve can be located at the first position or the second position, the optical fiber can be unlocked or locked, and the optical fiber connector can be further detached or assembled.

In a possible implementation manner, the first position-limiting part and the second position-limiting part are respectively matched with the position-limiting matching part in a structure, for example: the first limiting part and the second limiting part can be groove-shaped structures, and the limiting matching part can be a protrusion-shaped structure; or the first limiting part and the second limiting part can be of a convex structure, and the limiting matching part can be of a groove structure. In this embodiment, the first and second limiting parts are respectively matched with the structures of the limiting matching part, so that the sleeve can be located at the first position or the second position, the optical fiber can be unlocked or locked, and further the optical fiber connector can be disassembled or assembled.

In a possible implementation manner, the first limiting portion and the second limiting portion are located in different circumferential directions of the fiber pressing plate. In this embodiment, because the circumferential directions of the first limiting part and the second limiting part are different, the limiting matching part can be located at the first limiting part or the second limiting part by rotating the shifting lever of the sleeve, and the operation is simple and convenient.

In a possible implementation, the housing further includes a first opening and a second opening, the first opening and the second opening are both located at a side of the housing, and the first opening and the second opening are in communication; when the optical fiber connector is assembled, the shifting rod slides into the first opening from the second opening, after the optical fiber connector is assembled, the limiting matching part is located 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 circumferential dimension of the first opening is greater than the circumferential dimension of the second opening, the shift lever can shift or rotate at the first opening, so as to adjust the position of the sleeve, and further detach or assemble the optical fiber connector.

In one possible implementation, a length of the first opening in the axial direction is greater than a length of the shift lever in the axial direction. In this embodiment, since the length of the first opening is greater than the length of the dial rod, it can be achieved that the dial rod is located completely at the first opening.

In a possible implementation manner, the sleeve is used for moving between a first position and a second position relative to the fiber pressing plate, and specifically: the sleeve is used for moving in the axial direction relative to the fiber pressing plate between the first position and the second position. In this embodiment, the optical fiber can be locked or unlocked by axially moving the draw-out sleeve by an external force, i.e. linearly moving the draw-out sleeve around the fiber pressing plate in the axial direction, so as to conveniently adjust the position of the sleeve to the first position or the second position.

In a possible implementation manner, the outer wall of the fiber pressing plate is provided with a limiting groove and a main limiting 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 the 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 sliding block can be matched with the main limiting block of the fiber pressing plate and can also be matched with the limiting groove of the fiber pressing plate, so that the sleeve can be located at the first position or the second position, the optical fiber can be unlocked or locked, and the optical fiber connector can be further detached or assembled.

In a possible implementation manner, the outer wall of the fiber pressing plate is further provided with a secondary limiting block, and the limiting groove is located between the secondary limiting block and the primary limiting block; the sleeve further comprises a slave slide block and a limit opening, wherein the limit opening is positioned between the slave slide block and the master slide block. In this embodiment, the stopper groove is formed between the slave stopper and the master stopper; the limiting opening is positioned between the slave sliding block and the main sliding block, so that the structure is simple, and the optical fiber connector is convenient to assemble and disassemble.

In a possible implementation manner, the crimping structure includes a fixing portion, at least two cantilever beams and a bump structure, fixing ends of the at least two cantilever beams are connected with the fixing portion, inner walls of movable ends of the at least two cantilever beams are formed with the bump structure, and the movable ends of the at least two cantilever beams are used for compressing the optical cable. In this embodiment, the optical cable, especially the butterfly cable, can be fixed by the cooperation of at least two cantilever beams and the bump structures, etc., and the optical fiber connector can be conveniently disassembled or assembled.

In a possible implementation, the crimping structure includes fixed part, clamping ring part and the fine part of clamp that has the breach, wherein, clamping ring part contains protruding part, and establish when clamping ring part press from both sides during fine part, the reinforcement of optical cable is located press from both sides between fine part and the clamping ring part, protruding part inserts in the breach, protruding part is used for reducing press from both sides the deformation that fine part produced when being pressed by clamping ring part. In this embodiment, the optical fiber cable, particularly a round cable, can be fixed by the engagement of the pressing ring member and the notched fiber clamping member, and the like, and the optical fiber connector can be easily detached or assembled.

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

In one possible implementation, after the tail sleeve is fixed to the crimping structure, the tail sleeve presses the pressure ring component to fix the optical cable. Because the tail sleeve can be in a wedge-shaped structure, the tail sleeve gradually extrudes the pressure ring component and the crimping structure in the locking process of the internal thread of the tail sleeve and the external thread of the crimping structure until the tail sleeve is completely fixed on the crimping structure, and the optical cable is completely fixed.

In a second aspect, an embodiment of the present application provides an optical fiber connector, including a dust cap and an optical fiber connector as in any one 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 in the present application;

FIG. 2 is a schematic diagram of an external structure of an optical fiber connector according to the present application;

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 of the present application;

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

fig. 7 is a schematic view of the construction of the pressure ring member of fig. 6 of the present application;

fig. 8 is a schematic structural view of the ferrule holding portion in fig. 3 in the present application;

FIG. 9 is a schematic structural view of the bushing of FIG. 3 of 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 sleeve 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 diagram of another ferrule assembly of the fiber optic connector of the present application.

FIG. 14 is a cross-sectional view of a fiber optic connector according to the present application with a ferrule in a first position.

Fig. 15 is a cross-sectional view of a fiber optic connector of one of the ferrules in a second position according to the present application.

Detailed Description

The embodiment of the application provides an optical fiber connector and an optical fiber connector, the optical fiber connector can be assembled on site, plug and play are realized, the optical cable length of the optical fiber connector can be flexibly arranged on the construction site, the optical cable is saved, and the assembly is convenient and fast.

For the convenience of understanding, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

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

Fig. 2 is a schematic diagram of an external structure of the optical fiber connector 200, and the optical fiber connector 200 includes a housing 201, a crimping structure 202, a tail sleeve 203 and a dust cap 204, as viewed from the outside of the optical fiber connector 200 as a whole. Wherein, shell 201 is detachably fixed on crimping structure 202, and crimping structure 202 is detachably fixed on tail cover 203, and it is specifically detachable fixed mode have the multiple: such as: the shell 201 and the crimping structure 202 are connected and fixed together in a snap-fit manner, and the crimping structure 202 and the tail sleeve 203 are connected and fixed together in a threaded 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 convenience of understanding, the related art terms referred to in the optical fiber connector head 200 of the present embodiment are explained and described below.

Axial direction: it is understood that the direction of the central axis of the fiber optic connector head 200 is equivalent to the direction in which the ferrule 205 and the fiber optic cable 206 extend, i.e., 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 direction in which the housing 201 extends.

Circumferential direction: which may be understood as a circumferential direction around the central axis of the fiber optic connector head 200.

The radial direction is as follows: a direction perpendicular to the axial direction.

A sleeve shape: the sleeve-shaped element is sleeved on the outer surface of the long strip-shaped object to play a role in protection, strengthening fixation or connection, the sleeve-shaped element comprises a cylindrical (or tubular) shell, a hollow space is arranged in the shell, two end faces of the cylindrical (or tubular) shell are provided with openings, and the long 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 (also referred to as outer circumferential surface) connected between the two end faces. The sleeve-like member may have an axial direction extending from one end surface thereof to the other end surface thereof, a circumferential direction extending around the outer surface, and an axial direction extending perpendicularly from the inner surface to the outer surface, which may be understood as a direction perpendicular to the axial direction thereof, and may have a cylindrical shape, an oval shape, a rectangular shape, a square-like shape, a cylindrical-like shape, or the like, and the outer surface of the sleeve-like member may have a partial gap for the convenience of assembling the optical fiber connector head.

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

The unlocking of the optical fiber is that the optical 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. Locking of the fiber is in a significantly immovable state, such as: the optical fiber cannot move or displace in the axial direction relative to the housing of the optical fiber connector under the action of external force, or has movement with small amplitude or displacement with small amplitude in the axial direction relative to the housing of the optical fiber connector.

Fig. 3 is an exploded view of the fiber connector 200. from the internal structure, the fiber connector 200 further includes a ferrule assembly 220 including a ferrule 205 and a fiber optic cable 206. In the embodiment of the present application, the ferrule assembly 220 includes a ferrule 205, a spring 207, a ferrule holding portion 208, a fiber pressing plate 209, and a sleeve 210. Wherein, the shell 201 is sleeved outside the ferrule assembly 220, namely: the ferrule assembly 220 is partially or entirely located within the housing 201, and when the crimp structure 202 is secured to the housing 201, the crimp structure 202 can also be considered to fit over the outside of the ferrule assembly 220. The housing 201 and the ferrule fixing portion 208 are sleeved outside 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 housing 201 is generally sleeve-shaped, and the housing 201 is an integrated structure, and for convenience of description, the housing 201 is divided into the following parts: the shell comprises a shell main body 2011, a first opening 2012, a second opening 2013 and a first lug 2014, wherein the first opening 2012 and the second opening 2013 are positioned on the outer side surface of the shell main body 201, the first opening 2012 and the second opening 2013 are communicated together, the size of the first opening 2012 in the circumferential direction is larger than that of the second opening 2013 in the circumferential direction, and the size in the circumferential direction can also be referred to as the 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 length of the second opening 2013 in the circumferential direction may accommodate the lever 2101, which facilitates the lever 2101 to be pushed into the first opening 2102 from the second opening 2103 when the ferrule assembly 220 is inserted into the housing 201. The housing 201 also includes a first end 2015 and a second end 2016 along an axial direction, wherein the second opening 2013 extends in the axial direction to the first end 2015, the ferrule assembly 220 penetrates into the interior of the housing 201 through the first end 2015, the ferrule 205 can protrude the second end 2016 or not protrude the second end 2016, and the dust cap 204 can be inserted into the housing 201 from the second end 2016 to protect the ferrule from contamination.

The crimp structure 202 may have different structures according to the shape of the optical cable, such as: the crimp structure 202 for securing a butterfly-shaped cable as shown in fig. 5 and the crimp structure 202' for securing a round cable as shown in fig. 6 are separately described below.

Referring to fig. 5, in the first embodiment of the pressing structure 202, the pressing structure 202 is generally in the shape of a sleeve, and the pressing structure 202 is an integrated structure, and for convenience of description, the pressing structure 202 is divided into the following parts: a fixing part 2021, a fiber clamping part 2022, a bump structure 2023, a clamping groove 2024 and a thread 2025. The fixing portion 2021, the cantilever beam 2022, the bump structure 2023, the slot 2024 and the thread 2025 are sequentially connected together, the fixing portion 2021 may be a sleeve-shaped structure, and the fiber clamping portion 2022 is specifically at least two cantilever beams. The slot 2024 is located on the fixing portion 2021, and the first protrusion 2014 of the housing 201 is inserted into the slot 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 of two-piece type, so that when the pressing structure 202 is inserted into the housing 201, the fixing portion 2021 may have elasticity to enlarge the diameter of the fixing portion 2021 until the first protrusion 2014 is inserted into the slot 2024. The fixed ends of the two cantilever beams 2022 are connected to the fixed portion 2021, the inner walls of the movable ends of the two cantilever beams 2022 are respectively provided with a bump structure 2023, and the number of the bump structures 2023 is not limited herein. The two cantilever beams 2022 are oppositely arranged, the structures of the two cantilever beams 2022 can be the same or slightly different, and the cantilever beams 2022 are elastic. The screw 2025 is located on the side of the fixing portion 2021 close to the cantilever beam, the inner cavity of the tail sleeve 203 may be slightly smaller than the periphery of the two cantilever beams 2022 formed in a natural state, and during the process of screwing the internal thread on the tail sleeve 203 and the screw 2025 on the fixing portion 2021, the movable ends of the two cantilever beams 2022 may be pressed towards the optical cable 206 to clamp and fix the optical cable 206, wherein the bump structure 2023 may increase the tensile strength of the optical cable 206. Since the fiber optic cable 206 is connected to the ferrule assembly 220 and the fiber optic cable 206 is compressed by the crimp arrangement 202, the ferrule assembly 220 is prevented from moving axially back and forth. It should be noted that the crimping structure 202 may include a greater number of cantilever beams 2022, such as three, four, etc., which is not limited herein.

Fig. 6 is a schematic structural diagram of a second embodiment of the crimping structure, in which the crimping structure 202 'is similar to the crimping structure 202, and the structures and positions of the fixing portion, the catching groove and the threads of the crimping structure 202' are the same as those of the fixing portion, the catching groove and the threads of the crimping structure 202. The fiber clamping component 2022 'is different from the fiber clamping component 2022 in structure, and the fiber clamping component 2022' is a sleeve-shaped structure with a gap 2026. The crimping structure 202 'further includes a pressing ring member 211 as shown in fig. 7, the pressing ring member 211 is also a sleeve-shaped structure, a protrusion member 2111 is disposed on the inner wall of the pressing ring member 211, and when the pressing ring member 211 is sleeved on the fiber clamping member 2022', the protrusion member 2111 is inserted into the notch 2026. Specifically, the raised feature 2111 may be a bump. The process of securing the cable together with the ferrule 203 by the crimp structure 202' is as follows: when the round cable enters the crimping structure, the rubber threads of the round cable are stripped to expose a reinforcing piece such as aramid fiber, the reinforcing piece is placed on the outer side surface of the fiber clamping component 2022 ', and after the pressing ring component 211 is sleeved on the fiber clamping component 2022 ', the reinforcing piece is fixed between the pressing ring component 211 and the fiber clamping component 2022 '. Further, since the tail sleeve 203 may be wedge-shaped, and the inner diameter of the tail sleeve 203 close to the thread is larger than the inner diameter of the tail sleeve 203 far from the thread, when the internal thread of the tail sleeve 203 is screwed with the external thread 2025 of the fixing portion 2021, the tail sleeve 203 may further compress the pressure ring component 211, and the protrusion component may be configured to reduce deformation of the fiber clamping component when the fiber clamping component is compressed by the pressure ring component. Since the protrusion 2111 can be used to sufficiently fill the notch 2026 from the circumferential direction, the pressure ring member 211 is not deformed or is slightly deformed by the notch in the process of being pressed, the fiber clamping member 2022 'is not deformed, and therefore the strength member between the pressure ring member 211 and the fiber clamping member 2022' is further fastened, and the optical cable 206 located near the boot is also fixed because the strength member is fastened. Since the fiber optic cable 206 is connected to the ferrule assembly 220 and the fiber optic cable 206 is compressed by the crimp arrangement 202, the ferrule assembly 220 is prevented from moving axially back and forth.

Referring to the ferrule assembly 220, when the fiber connector 200 is assembled successfully, the ferrule 205 is fixed in the ferrule fixing portion 208, and the fiber pressing plate 209 and the ferrule fixing portion 208 are engaged with each other, for example, the fiber pressing plate 209 and the ferrule fixing portion 208 are engaged with each other. The fiber pressing plate 209 and the ferrule holding portion 208 cooperate to form a gap in the axial direction, and the gap may be in the shape of a hole, or a cylinder, a cone, etc., without limitation. The optical cable passes into the fiber connector 200 in the axial direction from the boot 203, the crimp structure 202, and the ferrule assembly 220 in that order. The form of the cable penetrating into the optical fiber connector 200 at different positions in the embodiment of the present application is different, for example: the fiber optic cables in the boot 203 may include stripped fiber optic cables and jacketed fiber optic cables; the fiber optic cables in the crimp structures 202 may include a sheath stripped fiber optic cable and a coated optical fiber; the optical fiber cable in the ferrule assembly 220 may have a coated optical fiber and an uncoated optical fiber (also referred to as an optical fiber or a bare fiber), and both the optical fiber cable between the ferrule holding portion 208 and the fiber pressing plate 209 and the optical fiber cable in the ferrule 205 are uncoated optical fibers (hereinafter simply referred to as optical fibers). In the ferrule assembly 220, the optical fiber penetrates through a gap between the fiber pressing plate and the ferrule holding part after being fitted to each other, and extends into the ferrule. The sleeve 210 and the fiber pressing plate 209 are movable relative to each other, and the movement of the sleeve 210 relative to the fiber pressing plate 209 can enable the optical fiber to be subjected to different pressing forces, so as to unlock or lock the optical fiber. When the sleeve moves relative to the wire pressing plate and is located at the first position of the fiber 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 borne by the optical fiber is a first extrusion force, and the optical fiber is in an unlocking state; when the sleeve moves relative to the wire pressing plate and is located at a second position of the fiber pressing plate, a second area is formed between the inner wall of the sleeve and the outer side of the fiber pressing plate, the extrusion force borne by the optical fiber is a second extrusion force, and the optical fiber is in a locking state at the moment; wherein the first and second regions are different, the first compressive force being less than the second compressive force. Specifically, the sleeve 210 as depicted in FIG. 9 may move circumferentially relative to the fiber-pressing plate 209 as depicted in FIG. 10, as described below. The sleeve 210 'depicted in fig. 13 is axially movable relative to the fiber press plate 209' depicted in fig. 13, as described in more detail below. The ferrule assembly 220 has a variety of different configurations, typically the ferrule 205, spring 207, and ferrule holder 208 are structurally and functionally unchanged, but the fiber platen 209 and ferrule have a variety of different configurations.

Fig. 8 is a schematic structural diagram of the ferrule holding portion 208, the ferrule holding portion 208 is entirely in the shape of a sleeve, the ferrule holding portion 208 is an integrated structure, and the ferrule holding portion 208 is divided into the following parts for convenience of description: a first end 2081, a connection portion 2082, a press-fit portion 2083, and a second end 2084. 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 2083 and the second end 2084 may be sleeve-shaped structures. A third opening 2085 is formed in the top surface of the connection portion 2082 away from the first end 2081, the structure of the press-fit portion 2083 in the embodiment of the present invention 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 can be fixed in the inner cavity of the core fixing portion 208, and the fixing manner is not limited here: such as by a rivet connection, such as: the inner cavity of the ferrule fixing part is provided with a boss, one end of the ferrule is fixed on the boss, and the ferrule fixing part are designed integrally. 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 abut against the crimping structure 202, a boss is arranged in an inner cavity of the crimping structure 202 and can abut against the spring 207, so that in the process of inserting the optical fiber connector into the adapter, the crimping structure 202 is driven to apply pressure to the spring 207 by applying thrust to the tail sleeve 203, the elastic force of the spring 207 enables the whole ferrule assembly 220 to move upwards along the axial direction to the adapter in a small range, and the plugging between the optical fiber connector and the adapter is facilitated.

The structure of the first sleeve 210 and the fiber-pressing plate 209 will be described next.

Fig. 9 is a schematic structural diagram of the sleeve 210, the sleeve 210 is in a sleeve shape, the shift lever 2101 is arranged on the outer wall of the sleeve 210 along the axial direction, the shift lever 2101 is close to the vicinity of the ferrule, and the shift lever 2102 is an elongated protrusion. When the fiber press plate 209 is mated with the ferrule holder 208, the ferrule 210 passes from the rear of the second port 2084 of the ferrule holder 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 fitting part 2102, and the fitting relationship between the limit fitting part 2102 and the fiber pressing plate 209 is described in detail in the next section, which is not further described herein.

As shown in fig. 10, the fiber pressing plate 209 may be an integrated structure, and the ferrule holding portion 208 is divided into the following parts for convenience of description: the pressing part 2091, the first engaging part 2092, the second engaging part 2093, the first limit part 2094 and the second limit part 2095. Wherein, first buckling parts 2091 and second buckling parts 2092 link together and have constituted the main part of pressing fine board 209, and the portion 2091 that compresses tightly is located the medial surface of pressing fine board 209 (specifically be second buckling parts 2092), and first spacing part 2094 and second spacing part 2095 are located the lateral surface of pressing fine board 209 (specifically be second buckling parts 2092). The first limit part 2094 and the second limit part 2095 are shaped to fit the limit fitting part 2102. As shown in fig. 11, when the driving lever 2102 is rotated in the second opening of the housing 201 to be away from the first opening by an external force, the limit matching 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), 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 the optical fiber receives a pressing force from between the fiber pressing plate and the ferrule fixing portion as a first pressing force. As shown in fig. 12, when the driving lever 2102 is rotated in the second opening of the housing 201 by an external force to be close to the first opening, the limit matching portion 2102 is located at the second limit portion 2094 (i.e., the sleeve 210 is located at the second position of the fiber pressing plate 209), a second area can be formed between the inner wall of the sleeve 210 and the outer wall of the fiber pressing plate 209, and the optical fiber receives a pressing force from between the fiber pressing plate and the ferrule fixing portion as a second pressing force, as shown in fig. 11 and 12, the space of the first area is significantly larger than that of the second area, the two areas are different, and the first pressing force is smaller than the second pressing force. Specifically, the method comprises the following steps: there is no interference between the first position-limiting part 2094 and the position-limiting matching part 2102, so when the position-limiting matching part 2102 is located on the first position-limiting part 2094, the optical fiber located in the ferrule assembly is not pressed or is pressed to a small extent, the pressure borne by the optical fiber located in the ferrule assembly is small, and the optical fiber located in the ferrule assembly is movable, that is, the optical fiber located in the ferrule assembly is in an unlocked state. The second limit part 2095 interferes with the limit matching part 2102, so when the limit matching part 2102 is located on the second limit part 2095, the optical fiber located in the ferrule assembly is squeezed, the pressure borne by the optical fiber located in the ferrule assembly is large, and the optical fiber located in the ferrule assembly is not movable, that is, the optical fiber located in the ferrule assembly is in a locked state. The specific shapes of the first limiting part 2094, the second limiting part 2095 and the limiting matching part 2102 can be various, such as: the first limiting part 2094 and the second limiting part 2095 are specifically groove-shaped structures, and the limiting matching part 2102 is a protrusion-shaped structure at this time, wherein the arc length of the groove of the first limiting part 2094 may be greater than the arc length of the groove of the second limiting part 2095. The first position-limiting part 2094 and the second position-limiting part 2095 are specifically protrusion-type structures, and the position-limiting matching part 2102 is a groove-type structure at this time, wherein the protrusion size of the first position-limiting part 2094 is greater than the protrusion size of the second position-limiting part 2095. The first limit portion 2094 and the second limit portion 2095 are located in different circumferential directions of the fiber pressing plate. The fiber press plate 209 may also include a raised structure 2096. The structure of the compressing portion 2091 is not limited, but the compressing portion 2091 and the compression fitting portion 2083 are required to be capable of being fitted with each other in the circumferential direction to be a whole, that is, the structure of the compressing portion 2091 and the structure of the compression fitting portion 2083 are opposite, after the compressing portion 2091 and the compression fitting portion 2083 are fitted with each other, a gap may be formed in the radial direction, the optical fiber may be passed in and out from one end face of the gap and then the optical fiber is passed in and out of the other end face of the gap.

The structure of the second bushing and the fiber press plate will be described next.

As shown in fig. 13, the outer side surface of the fiber pressing plate 209 ' is sequentially provided with a secondary limiting block 2091 ', a primary limiting block 2092 ' and a limiting groove 2093 ', and the secondary limiting block 2091 ' and the primary limiting block 2092 ' are of a protrusion type structure, so that the limiting groove 2093 ' between the secondary limiting block 2091 ' and the primary limiting block 2092 ' can show a groove type structure. A limit opening 2101 ' is arranged on the outer side surface of the sleeve 210 ', a slave slider 2102 ' and a master slider 2103 ' are respectively arranged at two ends of the limit opening 2101 ', the slave slider 2102 ' and the master slider 2103 ' can be the outer side surface of the sleeve 210 ', and the slave slider 2102 ', the limit opening 2101 ' and the master slider 2103 ' are sequentially arranged 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' can be sleeved between the fiber pressing plate 209 'and the ferrule fixing portion 208, and then the sleeve 210' can 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 or pulled to the limit groove 2093 ' by an external force, i.e., 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 between the fiber pressing plate and the ferrule fixing portion, and the slave limit block 2091 ' may be located in the limit opening 2101 '. That is to say: since the secondary limit block 2091 ' is located within the limit opening 2101 ', the secondary limit block 2091 ' is in a natural state without being squeezed; similarly, the main slider 2103 ' is located in the limiting groove 2093 ', the secondary limiting block 2091 ' does not contact the inner wall of the cavity of the housing 201, and therefore the main slider 2103 ' is also in a natural state without being pressed, so that the ferrule 210 ' and the fiber pressing plate 209 ' are in a natural state without being pressed, and therefore the optical fiber located between the ferrule fixing portion 208 ' and the fiber pressing plate 209 ' is not pressed, and therefore the ferrule 210 ' can freely slide in the axial direction at this time. As shown in fig. 15, when the main slider 2103 'is pushed or pulled to the main stopper 2092' by an external force, i.e. the main slider 2103 'is located at the auxiliary stopper 2092', the ferrule 210 'is located at the second position of the fiber pressing plate 209', and a second area can be formed between the inner wall of the ferrule 210 'and the outer wall of the fiber pressing plate 209', and at this time, the optical fiber is subjected to a second pressing force from a pressing force between the fiber pressing plate and the ferrule fixing portion. The slave slide 2102 'can also be positioned on the slave limit block 2091'. That is to say: since the sleeve 210' has been pushed completely into the ferrule holding portion 208 to a side close to the ferrule 205, the lower bottom surface of the slider is pressed against the upper bottom surface of the housing 201 from the upper and lower bottom surfaces, and the upper bottom surface is partially or completely pressed by the inner side of the housing 201; the upper and lower bottom surfaces of the main slider press against the main stopper 2091 ', and the upper bottom surface is partially or completely pressed by the inner side of the housing 201, so that the housing 201 presses against the sleeve 210', the sleeve 210 'presses against the fiber pressing plate 209', and further presses the optical fiber between the ferrule holder 208 'and the fiber pressing plate 209'. As shown in fig. 14 and 15, the first region includes a space larger than that of the second region, and the first pressing force is smaller than the second pressing force. It should be noted that: in some designs of the fiber press plate 209 ' and the ferrule 210 ', the secondary limit block 2091 ', the limit opening 2101 ', and the secondary slide 2102 ' may be omitted, and in such designs, the primary slide 2103 ' still slides between the primary limit block 2092 ' and the limit groove 2093 ' to achieve different positions of the ferrule 210 ' to achieve unlocking or locking of the optical fibers.

In this embodiment, the optical fiber connector in the embodiment of the present application uses the ferrule assembly to access the optical fiber, so that an installer can flexibly cut the optical fiber connector to obtain an optical cable with an actually required length according to the customer needs or the actually required length of the optical cable on the installation site, and the end of the cut optical cable 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, the optical cable is saved, and the assembly is convenient and fast. In addition, because the stripped optical fibers such as the sheath cable and the reinforcing member of the optical cable penetrate into the optical fiber connector from the tail sleeve and directly penetrate through the ferrule assembly, after the optical fibers are exposed out of the ferrule, the end face of the ferrule can be processed by grinding equipment, so that the optical fibers pre-embedded in the optical fiber connector and the optical fibers from an external optical cable can be prevented from being connected by using matching fluid, 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 pipe can be located at different positions by the movement of the sleeve pipe inside the ferrule assembly, so that different extrusion forces of the ferrule assembly on the optical fiber inside the ferrule assembly are realized, the optical fiber is unlocked or locked, and the assembly of the optical fiber connector is facilitated. In addition, due to the adoption of the optical fiber connector of the ferrule assembly, 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 using process, only the ferrule assembly or the certain part of the ferrule assembly needs to be replaced, and other parts of the optical fiber connector do not need to be replaced, so that the later maintenance cost is greatly reduced, and the cost is saved.

In the description of the embodiments of the present application, it should be noted that unless otherwise explicitly stated or limited, the term "connected" should be interpreted broadly, e.g., as meaning a fixed connection, an indirect connection via an intermediate, a connection between two elements, or an interaction between two elements. The specific meanings of the above terms in the embodiments of the present application can be understood by those of ordinary skill in the art according to specific situations.

The terms "first," "second," and "third," etc. in the description and claims of the embodiments of the present application and the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the embodiments of the present application, and are not limited thereto; although the embodiments of the present application have been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

Claims (15)

1. An optical fiber connector, comprising: the device comprises a shell, a compression joint structure and a core insert assembly; wherein,

the shell is in a sleeve shape and is sleeved on the outer side of the ferrule 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, the fiber pressing plate and the ferrule fixing part are matched with each other to form a gap, an optical fiber penetrates through the gap, and the optical fiber extends into the ferrule through the gap; the sleeve is used for moving between a first position and a second position relative to the fiber pressing plate;

when the sleeve is located at the first position, the extrusion force borne by the optical fiber is a first extrusion force;

when the sleeve is located at the second position, the extrusion force borne by the optical fiber is a second extrusion force; wherein the first compressive force is less than the second compressive force.

2. The optical fiber connector according to claim 1, wherein a deflector rod is disposed on an outer wall of the ferrule;

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

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

3. The optical fiber connector according to claim 2, wherein the outer wall of the fiber pressing plate is provided with a first limiting part and a second limiting part, and the inner wall of the sleeve is provided with a limiting matching part;

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

when the limiting matching part is positioned at the second limiting part, the sleeve is positioned at the second position of the fiber pressing plate.

4. The optical fiber connector according to claim 3, wherein the first and second position-limiting portions are groove-shaped structures, and the position-limiting mating portion is a protrusion-shaped structure; or

The first limiting part and the second limiting part are of a protruding structure, and the limiting matching part is of a groove structure.

5. The optical fiber connector according to any one of claims 3 or 4, wherein the first position-limiting portion and the second position-limiting portion are located in different circumferential directions of the fiber pressing plate.

6. The fiber optic connector of claims 2-5, wherein the housing further comprises a first opening and a second opening, the first opening and the second opening 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 shifting rod slides into the first opening from the second opening, after the optical fiber connector is assembled, the limiting matching part is located 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.

7. The fiber optic connector of claim 6, wherein the first opening has a length in the axial direction that is greater than a length of the stem in the axial direction.

8. The fiber optic connector of claim 1, wherein the ferrule is configured to move relative to the platen between a first position and a second position, in particular:

the sleeve is used for moving in the axial direction relative to the fiber pressing plate between the first position and the second position.

9. The optical fiber connector according to claim 8, wherein the outer wall of the fiber pressing plate is provided with a limiting groove and a main limiting 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 the 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.

10. The optical fiber connector according to claim 9, wherein the outer wall of the fiber pressing plate is further provided with a secondary stopper, and the stopper groove is located between the secondary stopper and the primary stopper;

the sleeve further comprises a slave slider and a limit opening, and the limit opening is positioned between the slave slider and the master slider.

11. The fiber optic connector of any one of claims 1 to 10, further comprising a tail sleeve removably secured to the crimp structure.

12. The optical fiber connector according to any one of claims 1 to 11, wherein the crimping structure includes a fixing portion, at least two cantilever beams, and a bump structure, fixed ends of the at least two cantilever beams are connected to the fixing portion, inner walls of movable ends of the at least two cantilever beams are formed with the bump structure, and movable ends of the at least two cantilever beams are used for compressing the optical cable.

13. The optical fiber connector according to any one of claims 1 to 11, wherein the crimping structure includes a fixing portion, a pressing ring component and a fiber clamping component with a notch, wherein the pressing ring component includes a protrusion component, 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, the protrusion component is inserted into the notch, and the protrusion component is used for reducing deformation generated when the fiber clamping component is squeezed by the pressing ring component.

14. The fiber optic connector of claim 13, wherein after the boot is secured to the crimp arrangement, the boot compresses the compression ring member to secure the optical cable.

15. An optical fiber connector comprising a dust cap and the optical fiber connector of any one of claims 1 to 14, wherein the dust cap is inserted into a housing of the optical fiber connector to protect the ferrule.

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