WO2021018015A1 - 一种光纤连接头以及光纤连接器 - Google Patents

一种光纤连接头以及光纤连接器 Download PDF

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Publication number
WO2021018015A1
WO2021018015A1 PCT/CN2020/103973 CN2020103973W WO2021018015A1 WO 2021018015 A1 WO2021018015 A1 WO 2021018015A1 CN 2020103973 W CN2020103973 W CN 2020103973W WO 2021018015 A1 WO2021018015 A1 WO 2021018015A1
Authority
WO
WIPO (PCT)
Prior art keywords
optical fiber
fiber connector
main shaft
fmc
protective cover
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2020/103973
Other languages
English (en)
French (fr)
Inventor
熊伟
李秀鹏
喻建雄
彭尚军
何伯勇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
Original Assignee
Huawei Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to MYPI2021000748A priority Critical patent/MY200351A/en
Priority to EP20847044.3A priority patent/EP3822677B1/en
Priority to JP2021514088A priority patent/JP7183400B2/ja
Priority to ES20847044T priority patent/ES3053680T3/es
Priority to BR112021006001-4A priority patent/BR112021006001A2/pt
Priority to MX2021003630A priority patent/MX2021003630A/es
Publication of WO2021018015A1 publication Critical patent/WO2021018015A1/zh
Priority to US17/183,938 priority patent/US11604318B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/36—Mechanical coupling means
    • G02B6/38—Mechanical coupling means having fibre to fibre mating means
    • G02B6/3807—Dismountable connectors, i.e. comprising plugs
    • G02B6/3869—Mounting ferrules to connector body, i.e. plugs
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/36—Mechanical coupling means
    • G02B6/38—Mechanical coupling means having fibre to fibre mating means
    • G02B6/3807—Dismountable connectors, i.e. comprising plugs
    • G02B6/3833—Details of mounting fibres in ferrules; Assembly methods; Manufacture
    • G02B6/3847—Details of mounting fibres in ferrules; Assembly methods; Manufacture with means preventing fibre end damage, e.g. recessed fibre surfaces
    • G02B6/3849—Details of mounting fibres in ferrules; Assembly methods; Manufacture with means preventing fibre end damage, e.g. recessed fibre surfaces using mechanical protective elements, e.g. caps, hoods, sealing membranes
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/36—Mechanical coupling means
    • G02B6/38—Mechanical coupling means having fibre to fibre mating means
    • G02B6/3807—Dismountable connectors, i.e. comprising plugs
    • G02B6/381—Dismountable connectors, i.e. comprising plugs of the ferrule type, e.g. fibre ends embedded in ferrules, connecting a pair of fibres
    • G02B6/3825—Dismountable connectors, i.e. comprising plugs of the ferrule type, e.g. fibre ends embedded in ferrules, connecting a pair of fibres with an intermediate part, e.g. adapter, receptacle, linking two plugs
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/36—Mechanical coupling means
    • G02B6/38—Mechanical coupling means having fibre to fibre mating means
    • G02B6/3807—Dismountable connectors, i.e. comprising plugs
    • G02B6/3887—Anchoring optical cables to connector housings, e.g. strain relief features

Definitions

  • This application relates to the field of optical communication technology, and in particular to an optical fiber connector and an optical fiber connector.
  • the entrance section of the optical cable is used to connect the fiber distribution box and the fiber terminal box.
  • one method is fusion splicing, that is, the distribution box corresponding to each household Optical fiber end, the fiber end of each household and the home fiber optic cable are spliced in the fiber distribution box with a fiber fusion splicer, and then the home fiber optic cable is laid to each home.
  • the embodiments of the present application provide an optical fiber connector and an optical fiber connector, so that the optical fiber connector is convenient to plug and play with the adapter outdoors, and the operation is simple and fast, safe and reliable.
  • an embodiment of the present application provides an optical fiber connector, including: a handle, a tail sleeve, an optical cable, a field mountable connector (FMC) assembly, a spindle, and a protective cover.
  • One end of the optical cable is connected to the FMC assembly, And the optical cable extends from the first end of the FMC assembly, the FMC assembly includes a ferrule, the ferrule is arranged at the second end of the FMC assembly; the main shaft is sleeved at the first end of the FMC assembly, and the protective cover is sleeved at the second end of the FMC assembly And the protective cover is fixedly connected with the main shaft; the end of the main shaft away from the protective cover is connected with the tail sleeve, the end of the main shaft away from the protective cover is used for fixing the optical cable, and the handle is sleeved on the protective cover and the outside of the main shaft.
  • FMC field mountable connector
  • the optical fiber connector in the embodiment of the present application uses FMC components to connect to the optical cable.
  • the installer can flexibly cut and obtain the actual length required.
  • the cut ends of the optical cable can be assembled at the installation site, for example, first assembled into FMC components, and then the handle, tail sleeve, spindle, and protective cover are assembled with the FMC components to assemble the optical fiber on site Connector. It can be seen that the length of the optical cable of the optical fiber connector in this embodiment can be flexibly set at the construction site, which is beneficial to saving optical cables and is convenient and quick to assemble.
  • the optical fiber connector can be assembled by arranging the main shaft, protective cover, handle and tail sleeve on the FMC component, which can protect the FMC component to meet the IP68 protection level. Because the FMC component is effectively protected, the optical fiber The connector is convenient to plug and play outdoors and the adapter is easy to operate, safe and reliable.
  • the optical fiber connector using the FMC component can be assembled and disassembled on site. If the ferrule or FMC component is damaged during use, only the FMC component needs to be replaced. There is no need to replace the entire optical fiber connector with the optical cable. Reduce the maintenance costs in the later period and save costs.
  • the protective cover includes a cover body and a fixing sleeve formed by one end of the cover body, the fixing sleeve is inserted into the main shaft, the FMC component penetrates the fixing sleeve and the cover body, and the cover body is sleeved on the insert The outside of the core.
  • the cover is sleeved on the outside of the ferrule to protect the ferrule.
  • the inner wall of the end of the main shaft away from the protective cover is formed with a shoulder, and the first end of the FMC component abuts against the shoulder. It can prevent the FMC component from sliding in the direction away from the protective cover along the axis of the spindle.
  • the end of the main shaft far from the protective cover includes a fixing part and a crimping structure formed by the end surface of the fixing part.
  • the fixing part and the crimping structure are sleeved on the outside of the optical cable, and the fixing part
  • the outer wall is formed with external threads
  • the inner wall of the tail sleeve is provided with internal threads
  • the tail sleeve is sleeved outside the fixed part and the crimping structure
  • the internal thread on the tail sleeve is screwed with the external thread on the fixing part to fix the crimping structure Optical cable.
  • the FMC assembly can be further prevented from moving back and forth in the main shaft along the axis of the main shaft.
  • the crimping structure includes at least two cantilever beams, the fixed ends of the at least two cantilever beams are connected to the fixed part, and the inner walls of the movable ends of the at least two cantilever beams are formed with a convex point structure , The movable ends of at least two cantilever beams are used to compress optical cables.
  • a specific implementation of the crimping structure is provided, which improves the practicability of the solution, and the bump structure can increase the tensile performance of the optical cable.
  • the outer diameter of the fixing sleeve is smaller than the outer diameter of the cover body, so that the fixing sleeve can be inserted into the main shaft, and the end surface of the cover body close to the fixing sleeve can be provided with a fixed structure and the main shaft. Make a fixed connection.
  • a first fixing structure is provided on the main shaft
  • a second fixing structure is provided on the protective cover
  • the first fixing structure and the second fixing structure are snapped and fixedly connected to prevent the protective cover from being Move forward and backward along the axis of the main shaft.
  • a snap-fit connection between the main shaft and the protective cover can facilitate the installation and disassembly of the optical fiber connector. Compared with the threaded connection, it can greatly shorten the on-site assembly and disassembly of the optical fiber connector.
  • the first fixing structure is a buckle and the second fixing structure is a buckle; or the first fixing structure is a buckle and the second fixing structure is a buckle.
  • a specific implementation manner of the first fixing structure and the second fixing structure is provided, which improves the feasibility of the solution.
  • the first fixing structure is a buckle, which is provided on the end surface of the main shaft facing the protective cover;
  • the second fixing structure is a card slot, which is provided on the end surface of the cover close to the fixing sleeve .
  • the buckle and the groove are respectively provided on the end surfaces of the main shaft and the cover body, which facilitates the buckle and the groove to buckle and has a more compact space.
  • the optical fiber connector further includes a pin
  • the first fixing structure is a first insertion hole
  • the second fixing structure is a second insertion hole
  • the pin is used to insert the first insertion hole and the second insertion hole. Jack.
  • another realization method of fixing the main shaft and the protective cover is provided, which improves the scalability of the solution.
  • the optical fiber connector further includes a circlip
  • the first fixing structure is a first groove
  • the second fixing structure is a second groove
  • the circlip is used for inserting into the first groove and The second groove.
  • the end surface of the main shaft facing the protective cover and the end surface of the cover body close to the fixing sleeve are bonded together by glue.
  • the protective cover and the main shaft can also be fixed directly by glue, which improves the flexibility of the solution.
  • a positioning key is provided on the end surface of the main shaft facing the protective cover, and a positioning groove is provided on the end surface of the cover body close to the fixed sleeve; or, the end surface of the main shaft facing the protective cover is provided There is a positioning groove, and the end surface of the cover body close to the fixed sleeve is provided with a positioning key; the positioning key is inserted into the positioning groove.
  • the fixing sleeve can be prevented from rotating in the main shaft after being inserted into the main shaft, and further preventing the fixing sleeve from sliding into the main shaft.
  • the inner cavity of the fixed sleeve is matched with the FMC assembly to prevent the fixed sleeve from rotating relative to the FMC assembly.
  • the end of the protective cover facing away from the main shaft is provided with an opening, so that the cross section of the end of the protective cover facing away from the main shaft is C-shaped, and the opening may be flared, that is, the opening
  • the end has a curved surface, which plays a guiding role, which is beneficial to guide the insertion of the optical fiber connector into the adapter.
  • an optical cable sealing ring is provided on the outside of one end of the optical cable close to the FMC component, which can prevent foreign matter, moisture, dust, etc. from entering the optical fiber through the gap between the optical cable and the tail jacket or the main shaft.
  • Inside the connector there is a spindle seal ring on the spindle near the end of the protective cover, so as to prevent foreign matter, moisture, dust, etc. from entering the fiber connector from the gap between the handle and the spindle, so that the fiber connector is sealed better.
  • the optical fiber connector further includes a dust cap, and the dust cap is connected to the end of the handle away from the tail sleeve.
  • the dust cap can protect the FMC components from dust and water before the fiber connector is inserted into the adapter.
  • a protruding locking structure is provided on the inner wall of the end of the handle far away from the tail sleeve, and the outer surface of one end of the dust cap is provided with a locking groove, and the locking structure It is used to buckle with the locking groove, and the dust cap sealing ring is provided on the outer end of the dust cap near the handle.
  • the locking structure and the locking groove can be buckled to fix the handle and the dust cap, and the dust cap sealing ring makes the dust cap form a good sealing effect when it is buckled with the handle.
  • an indicator mark is provided on the outer surface of the end of the handle away from the tail sleeve to indicate the connected state or the loosened state of the handle. It is convenient to intuitively understand the connection status of the optical fiber connector during on-site installation.
  • the outer surface of the end of the handle close to the tail sleeve is formed with two symmetrical flattened planes, and grooves are formed on the flattened planes.
  • the operating handle When the operating handle is fixed to the dust cap, it can clamp the flattened plane for rotating operation to prevent slipping.
  • the groove can further improve the friction to increase the operating feel.
  • an embodiment of the present application provides an optical fiber connector, including an adapter and an optical fiber connector as in any embodiment of the first aspect.
  • One end of the adapter is provided with a cavity and a slot surrounding the cavity, and the optical fiber is connected
  • the FMC assembly of the head is inserted into the cavity of the adapter, and the protective cover of the optical fiber connector is inserted into the slot.
  • the outer surface of one end of the adapter is provided with a sliding groove
  • the handle of the optical fiber connector is provided with a protruding locking structure on the inner wall of the end away from the tail sleeve, and the locking structure slides Connect to the chute.
  • the optical fiber connector in the embodiment of the present application uses FMC components to connect to the optical cable, it can be flexibly cut by the installer to obtain the optical cable of the actual required length according to the needs of the customer or the length of the optical cable actually required at the installation site.
  • the cut ends of the optical fiber cable can be assembled, for example, first assembled into FMC components, and then the handle, tail sleeve, spindle, and protective cover are assembled with the FMC components, and then the optical fiber connector is assembled on site. It can be seen that the length of the optical cable of the optical fiber connector in this embodiment can be flexibly set at the construction site, which is beneficial to saving optical cables and is convenient and quick to assemble.
  • the optical fiber connector can be assembled by arranging the main shaft, protective cover, handle and tail sleeve on the FMC component, which can protect the FMC component to meet the IP68 protection level. Because the FMC component 150 is effectively protected, the The optical fiber connector is convenient to plug and play outdoors with the adapter, and the operation is simple and fast, safe and reliable. In addition, the optical fiber connector using the FMC component can be assembled and disassembled on site. If the ferrule or FMC component is damaged during use, only the FMC component needs to be replaced. There is no need to replace the entire optical fiber connector with the optical cable. Reduce the maintenance costs in the later period and save costs.
  • Figure 1 is a network architecture diagram of the application
  • FIG. 2 is a schematic structural diagram of the optical fiber connector in this application.
  • FIG. 3 is a schematic diagram of the external structure of the optical fiber connector in this application.
  • Figure 4 is an exploded exploded view of the optical fiber connector in this application.
  • Figure 5 is a cross-sectional view of the optical fiber connector in this application.
  • Figure 6a is an exploded exploded view of the FMC component in this application.
  • Figure 6b is a cross-sectional view of the FMC assembly in this application.
  • Figure 7 is a schematic diagram of the crimping structure on the spindle in this application.
  • Figure 8 is a schematic diagram of the locking structure on the handle in this application.
  • Figure 9 is a schematic structural diagram of an optical fiber connector with a dust cap in this application.
  • Fig. 10a is a schematic structural diagram of the main shaft and the protective cover fixed by a buckle in this application;
  • Figure 10b is a schematic diagram of the structure of the positioning groove on the spindle in this application.
  • Figure 10c is a schematic diagram of the structure of the positioning key on the protective cover in this application.
  • Figure 11 is a schematic structural diagram of the main shaft and the protective cover fixed by pins in this application;
  • FIG. 12 is a schematic diagram of the structure in which the main shaft and the protective cover are fixed by a circlip in this application;
  • Figure 13 is a schematic diagram of the structure of the adapter in this application.
  • Figure 14 is an exploded exploded view of the adapter in this application.
  • the embodiments of the present application provide an optical fiber connector and an optical fiber connector.
  • the optical fiber connector can be assembled on site and plug and play, and the length of the optical fiber cable of the optical fiber connector can be flexibly set at the construction site, which is beneficial to saving optical cables. And the assembly is convenient and quick.
  • FIG. 1 shows a part of the optical network of FTTx.
  • FTTx can be FTTH (fiber to the home), FTTC (fiber to the curb, fiber to the roadside), or FTTP (fiber to the premises). , Fiber to the premises), FTTN (fiber to the node or neighborhood, fiber to the node), FTTO (fiber to the office, fiber to the office), or FTTSA (fiber to the service area, fiber to the service area) Service area).
  • FTTH from the downstream of the center office (CO), FTTH includes feeder link 1, 1:N splitter 2, distribution link 3, 1:m splitter 4, and at least A branch link 5, in this application, the optical fiber connector used in the outdoor environment is suitable for the branch link 5.
  • this application is based on a type of network with FTTx structure as an example, other network structures are also applicable.
  • FIG. 2 is the optical fiber connector 10 of this application.
  • the optical fiber connector 10 includes an optical fiber connector 100, an optical fiber connector 300 and an optical fiber adapter 200.
  • the optical fiber connector 100 is connected to another optical fiber connector 300 through an optical fiber adapter 200 to realize the internal optical fiber connection.
  • the optical fiber connector 100 includes a dust cap 110, a handle 120, a tail sleeve 130, and an optical cable 140.
  • the optical fiber connector 100 also includes a field mountable connector (FMC) assembly 150, a spindle 160, and a protective cover 170.
  • FMC field mountable connector
  • the handle 120 and The tail sleeve 130 is sleeved on the outer side of the main shaft 160 and the protective cover 170, and the main shaft 160 and the protective cover 170 are sleeved on the outer side of the FMC assembly 150.
  • the FMC assembly 150 includes a ferrule 1501, and the ferrule 1501 is arranged in The second end 150b of the FMC component 150, the main shaft 160 is sleeved outside the first end 150a of the FMC component 150, the protective cover 170 is sleeved outside the second end 150b of the FMC component 150, and the main shaft 160 and the protective cover 170 are fixed connection.
  • the handle 120 is sleeved on the outside of the main shaft 160 and the protective cover 170, the tail cover 130 is connected to the end of the main shaft 160 away from the protective cover 170, and the end of the main shaft 16 away from the protective cover 170 is used to fix the optical cable 140.
  • the FMC assembly 150 may include a ferrule 1501, a ferrule fixing portion 1502, an outer frame sleeve 1503, a base 1504, a spring 1505, and FMC tail sleeve 1506, the optical cable 140 is connected to the base 1504 and stripped into optical fibers, and the optical fiber penetrates the ferrule fixing part 1502 and is connected with the ferrule 1501.
  • the ferrule fixing part 1502 is used to fix the ferrule 1501 and protect the optical fiber
  • the outer frame sleeve 1503 is sleeved on the outer side of the ferrule 1501 and the ferrule fixing part 1502, the outer frame sleeve 1503 is fixedly connected to the end of the base 1504 close to the ferrule 1501, the end of the base 1504 far away from the ferrule 1501 is screwed with the FMC tail sleeve 1506 through the thread
  • spring 1505 is fixed on the inner wall of the base 1504, and one end of the spring 1505 close to the ferrule 1501 abuts against the ferrule fixing portion 1502 for supporting the ferrule 1501 and the ferrule fixing portion 1502 and making the ferrule 1501 flexible.
  • the optical cable 140 of any length can be cut according to actual needs, and then the optical cable 140 is connected to the base 1504, the ferrule fixing part 1502 and the ferrule 1501 in sequence, and then the outer frame cover 1503 is set On the outside of the ferrule 1501 and the ferrule fixing part 1502, and fixed with the base 1504, then the FMC tail sleeve 1506 is sleeved on the outside of the base 1504, and screwed with the base 1504 to complete the optical cable 140 connecting to the FMC assembly 150
  • the main shaft 160, the protective cover 170, the handle 120 and the tail sleeve 130 are sleeved outside the FMC assembly 150.
  • the optical cable 140 in this application may include various cable types such as butterfly cables, round cables, and flat cables, which are not specifically limited here.
  • the protective cover 170 includes a cover body 171 and a fixing sleeve 172 formed by one end of the cover body 171.
  • the fixing sleeve 172 is inserted into the main shaft 160, and the cover body 171 is sleeved on the outside of the ferrule 1501 to realize mating insertion. Protection of core 1501.
  • the protective cover 170 can be quickly positioned, which is beneficial to quickly realize the alignment between the axis of the protective cover 170 and the axis of the main shaft 160. And then quickly install.
  • the cavity inside the fixing sleeve 172 can be matched with the outer frame sleeve 1503 of the FMC component 150.
  • the cross section of the cavity inside the fixing sleeve 172 can be square, and the cross section of the outer frame sleeve 1503 of the FMC component 150 can also be square. , And the sizes between the two are matched, so as to prevent the fixed sleeve 172 from rotating relative to the FMC assembly 150.
  • the length of the optical cable is fixed before leaving the factory and cannot be changed at the construction site.
  • manufacturers generally produce optical fiber connectors of various specifications, such as optical fiber connectors.
  • the lengths are respectively 50 meters, 100 meters and 200 meters. If only 60 meters of optical cables are required on the construction site, then during the construction process, the customer still needs to equip customers with optical fiber connectors with a length of 100 meters, which is bound to cause The 40-meter-long optical cable was wasted.
  • the optical fiber connector 100 in the embodiment of the present application uses the FMC component 150 to connect to the optical cable 140, it can be flexibly cut by the installer to obtain the optical cable of the actual required length according to customer needs or the actual length of the optical cable required at the installation site.
  • the end of the cut optical fiber cable can be assembled at the installation site.
  • the FMC assembly 150 is assembled first, and then the handle 120, tail sleeve 130, spindle 160, and protective cover 170 are assembled with the FMC assembly 150, and then assembled on site
  • the optical fiber connector 100 is assembled. It can be seen that the length of the optical fiber cable of the optical fiber connector 100 in this embodiment can be flexibly set at the construction site, which is beneficial for saving optical cables and is convenient and quick to assemble.
  • the optical fiber connector 100 can be assembled by arranging the main shaft 160, the protective cover 170, the handle 120, and the tail sleeve 130 on the FMC assembly 150.
  • the FMC assembly 150 can be protected to meet the IP68 protection level. Effective protection makes the optical fiber connector 100 convenient to plug and play with the adapter 200 outdoors, simple and fast operation, safe and reliable.
  • the optical fiber connector using the FMC component can be assembled and disassembled on site. If the ferrule or FMC component is damaged during use, only the FMC component needs to be replaced. There is no need to replace the entire optical fiber connector with the optical cable. Reduce the maintenance costs in the later period and save costs.
  • an optical cable sealing ring 141 is provided on the outer end of the optical cable 140 close to the FMC assembly 150, which can prevent foreign matter, moisture, dust, etc. from outside the optical cable 140 and the tail sleeve 130 or The gap between the spindles 160 enters the optical fiber connector 100.
  • a spindle seal 164 is provided on the outer end of the spindle 160 close to the protective cover 170, so as to prevent foreign matter, moisture, dust, etc. from entering the fiber connector 100 through the gap between the handle 120 and the spindle 160 , So that the optical fiber connector 100 has better sealing performance.
  • the inner wall of the end of the main shaft 160 away from the protective cover 170 is formed with a shoulder 161, and the shoulder 161 abuts the first end 150a of the FMC assembly 150, which prevents the FMC assembly 150 from moving in the axial direction of the main shaft 160 Sliding in the direction away from the protective cover 170 plays a role of limiting the FMC assembly 150.
  • the end of the main shaft 160 away from the protective cover 170 includes a fixing portion 162 and a crimping structure 163 formed by an end surface of the fixing portion 162.
  • the fixing portion 162 and the crimping structure 163 are sleeved outside the optical cable 140,
  • the outer wall of the fixing part 162 is formed with external threads
  • the inner wall of the tail sleeve 130 is provided with internal threads
  • the tail sleeve 130 is sleeved outside the fixing part 162 and the crimping structure 163
  • the internal threads on the tail sleeve 130 are in line with those on the fixing part 162.
  • the external thread is screwed, so that the crimping structure 163 fixes the optical cable 140.
  • the crimping structure 163 may include two cantilever beams 1631, the fixed ends of the two cantilever beams 1631 are connected to the fixed portion 162, and the inner walls of the movable ends of the two cantilever beams 1631 A bump structure 1632 is provided on each, and the number of the bump structure 1632 is not specifically limited here.
  • the inner cavity of the tail sleeve 130 can be slightly smaller than the outer periphery formed by the two cantilever beams 1631 in a natural state, and the internal thread on the tail sleeve 130 and the external thread on the fixing portion 162 will be compressed during the tightening process.
  • the movable end of the cantilever beam 1631 is squeezed in the direction of the optical cable 140 to clamp the optical cable 140, wherein the bump structure 1632 can increase the tensile performance of the optical cable 140. Since the optical cable 140 is connected to the FMC assembly 150, and the optical cable 140 is pressed by the crimping structure 163 on the main shaft 160, the FMC assembly 150 can be prevented from moving back and forth in the main shaft 160 along the axial direction of the main shaft 160.
  • the crimping structure 163 may include a larger number of cantilever beams 1631, such as three or four, which are not specifically limited here. In other embodiments, the crimping structure 163 may also be a cylindrical structure, and the cylindrical structure is made of elastic material.
  • the inner cavity of the tail sleeve 130 may be slightly smaller than the outer periphery of the cylindrical structure. During the process of tightening the internal threads on the tail sleeve 130 and the external threads on the fixing portion 162, the tail sleeve 130 will squeeze the elastic crimping structure 163 to fix the optical cable 140.
  • the handle 120 is a cylindrical structure with a stepped surface inside, wherein the stepped surface inside the handle 120 abuts on the end of the main shaft 160 close to the protective cover 170 to prevent the handle 120 from sliding away from the tail sleeve 130 After the tail sleeve 130 is screwed to the fixing part 162, the tail sleeve 130 can abut the handle 120 to prevent the handle 120 from sliding in the direction close to the tail sleeve 130.
  • the outer surface of the main shaft 160 is provided with a sliding groove
  • the inner surface of the handle 120 is provided with a flange. The flange can be buckled with the sliding groove by rotating the handle.
  • the handle is fixed together, which is not limited here.
  • a protruding locking structure 1201 is provided on the inner wall of the end of the handle 120 away from the tail sleeve 130.
  • the locking structure 1201 may be a cylindrical protrusion, and the number may be 1. There can also be more than one, which is not specifically limited here.
  • the dust cap 110 is fastened to the optical fiber connector 100 by a rope strap.
  • the dust cap 110 is mainly used to prevent dust and water from the optical fiber connector 100 before the adapter 200 is inserted.
  • Protect the role of the FMC component 150 In order to form a good sealing effect when the dust cap 110 is engaged with the handle 120, a dust cap sealing ring 111 is provided on the outside of the dust cap 110.
  • One end of the dust cap 110 is provided with a accommodating cavity for the optical fiber connector 110.
  • the accommodating cavity extends along the axial direction of the dust cap 110 and can accommodate the protective cover 170 in the optical fiber connector 100 and one end of the FMC assembly 150 connected to the outside.
  • the outer surface of the dust cap 110 is provided with at least one locking groove 112.
  • the number of the locking groove 112 is the same as the number of the locking structure 1201 on the handle 120.
  • the locking structure 1201 is used to buckle with the locking groove 112. Closed, so that the dust cap 110 and the handle 120 are fixed.
  • an indicator 121 is provided on the outer surface of the end of the handle 120 away from the tail sleeve 130 to indicate the connection or loosening state of the handle 120.
  • the outer surface of the handle 120 near the end of the tail sleeve 130 is provided with a flattened flat surface 122.
  • the flattened flat surface 122 can be clamped for rotation operation, thereby preventing slipping.
  • anti-slip grooves can also be formed on the flattened surface 122 to increase the operating feel.
  • the flattening plane 122 may be a symmetrical pair or multiple symmetrical pairs, such as two pairs, three pairs, etc., which are not specifically limited here.
  • the end of the protective cover 170 facing away from the main shaft 160 is provided with an opening 1703, so that the cross section of the end of the protective cover 170 facing away from the main shaft 160 is C-shaped, that is, the protective cover 170 It is a C-shaped cover with an opening 1703 on the circumference.
  • opening 1703 there may be more than one opening 1703 on the peripheral surface of the protective cover 170, for example, it may include two openings, three openings, etc., which are not specifically limited here.
  • the above-mentioned opening 1703 may be in the shape of a horn, that is, the end of the opening 1703 has a curved surface, which serves as a guide and is beneficial to guide the optical fiber connector 100 to be inserted into the adapter 200.
  • the fixing sleeve 172 is inserted into the main shaft 160, and a first fixing is provided on the end surface of the main shaft close to the protective cover 170
  • a second fixing structure 1701 is provided on the end surface of the cover body 171 close to the fixing sleeve 172, and the first fixing structure 1601 is engaged with the second fixing structure 1701 so that the main shaft 160 and the protective cover 170 are fixedly connected.
  • the main shaft and the protective cover adopt a snap-fixed connection method, which can facilitate the installation and disassembly of the optical fiber connector.
  • the installation and disassembly time of the optical fiber connector provided in this embodiment is only 1/5 of the installation and disassembly time of the optical fiber connector in the threaded connection mode.
  • the outer diameter of the fixing sleeve 172 is smaller than the outer diameter of the cover body 171.
  • the first fixing structure 1601 can be arranged at any position on the end surface of the main shaft 160
  • the second fixing structure 1701 can be arranged at any position on the end surface of the cover body 171.
  • the second fixing structure 1701 can be arranged A position corresponding to the opening 1703 on the end surface of the cover 171.
  • the main shaft 160 in order to prevent the fixing sleeve 171 from rotating in the main shaft 160 after being inserted into the main shaft 160, and to further prevent the fixing sleeve 171 from sliding into the main shaft 160, the main shaft 160 is close to the end surface of the protective cover 170
  • a positioning groove 1602 is provided on the upper side, and a positioning key 1702 is provided on the end surface of the cover body 171 close to the fixing sleeve 172.
  • the positioning key 1702 can be inserted into the positioning groove 1602. Of course, it can also be the end surface of the main shaft 160 near the protective cover 170.
  • a positioning key 1702 is provided on the cover body 171, and a positioning groove 1602 is provided on the end surface of the cover body 171 close to the fixing sleeve 172.
  • the positioning key 1702 and the positioning groove 1602 may be one set or multiple sets, which are not specifically limited here.
  • first fixing structure 1601 and the second fixing structure 1701 There may be multiple implementation manners of the above-mentioned first fixing structure 1601 and the second fixing structure 1701, which are respectively introduced below:
  • the first fixing structure 1601 may be a buckle
  • the second fixing structure 1701 may be a buckle
  • the buckle and the groove are buckled to fix the main shaft 160 and the protective cover 170, except
  • the first fixing structure 1601 can also be a card slot
  • the second fixing structure 1701 can be a buckle
  • the buckle and the corresponding card slot can be set in one group or multiple groups, which is not specifically described here. limited.
  • the optical fiber connector 100 may further include a pin 180, the first fixing structure 1601 may be a first insertion hole, the second fixing structure 1701 may be a second insertion hole, and the pin 180 may Insert the first jack and the second jack to fix the first jack and the second jack. It is understandable that the pin 180, the first jack and the second jack can be set in one set or set Multiple groups, the specifics are not limited here.
  • the optical fiber connector may further include a circlip 190
  • the first fixing structure 1601 may be a first groove
  • the second fixing structure 1701 may be a second groove
  • the circlip 190 The first groove and the second groove can be inserted to fix the first groove and the second groove.
  • the circlip 190, the first groove and the second groove can be set in one group, or Multiple groups can be set, and the details are not limited here.
  • the end surface of the main shaft 160 facing the protective cover 170 and the end surface of the cover body 171 close to the fixing sleeve 172 can be glued. Bonding together, the specifics are not limited here.
  • optical fiber connector 100 in the embodiment of the present application is described above, and the optical fiber connector 10 in the present application is introduced below:
  • the optical fiber connector 10 includes an adapter 200 in addition to the above-mentioned optical fiber connector 100.
  • an adapter 200 in addition to the above-mentioned optical fiber connector 100.
  • one end of the optical fiber adapter 200 is provided with a socket 201.
  • the socket 201 is provided with a cavity 2011 and a slot 2012.
  • the cavity 2011 is located in the middle of the socket 201, and the cavity 2011 and the slot 2012 extend axially along the socket 201.
  • the slot 2012 surrounds the periphery of the cavity 2011.
  • the FMC component 150 in the optical fiber connector 100 can be inserted into the cavity 2011, and the protective cover 170 in the optical fiber connector 100 can be inserted into the slot 2012.
  • the slot 2012 may also be provided with a strip protrusion 2014 extending axially along the socket 201, so that the cross section of the slot 2012 forms a C shape, and the strip protrusion 2014 and The opening width of the C-shaped cover is equivalent, and the slot 2012 can be seamlessly connected with the C-shaped cover, which realizes the blind insertion of the above-mentioned optical fiber connector 100, and the operation is more convenient, and the optical fiber connector 10 can be plug and play.
  • a second sliding groove 2015 is formed on the outer periphery of the optical fiber socket 201, and the sliding groove 2015 is in a spiral shape.
  • the sliding groove 2015 extends from one end of the socket 201 in the circumferential direction of the socket 201, and the The extending end of the sliding groove 2015 engages with the locking structure 1201 on the handle 120.
  • the outer surface of the optical fiber socket 201 is provided with arrow marks and "0" and "1" marks.
  • the sliding groove 2015 may have the same shape as the locking groove 112 on the dust cap 110.
  • the optical fiber adapter 200 includes an O-shaped sealing ring 222, a lock nut 220, an O-shaped sealing ring 240, a socket body 210, and a ceramic sleeve 212.
  • the O-shaped sealing ring 240, the lock nut 220, and the O-shaped sealing ring 222 are sequentially sleeved on the socket main body 210, and the ceramic sleeve 212 is inserted into the other end of the socket main body 210 through the O-shaped
  • the sealing ring 222 is fastened.
  • One end of the socket body 210 is provided with a socket 201, and the other end is provided with a socket 202, sockets 201 and 202, and a ceramic sleeve 212 placed in the center, which can be welded together by ultrasonic waves.
  • the optical fiber adapter 200 includes an adapter dust cap 230.
  • One end of the adapter dust cap 230 is provided with an adapter accommodating cavity for accommodating the optical fiber adapter 200.
  • the adapter 200 is inserted into the dust cap 230 to accommodate the socket 201.

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  • General Physics & Mathematics (AREA)
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  • Light Guides In General And Applications Therefor (AREA)

Abstract

一种光纤连接头（100）以及光纤连接器（10），光纤连接头（100）可以在室外使用，并可在现场装配，即插即用，且光纤连接头（100）的光缆（140）长度可以在施工现场灵活设置，有利于节约光缆（140），且组装方便快捷。光纤连接头（100）包括：手柄（120）、尾套（130）、光缆（140）、FMC组件（150）、主轴（160）以及保护罩（170），光缆（140）的一端与FMC组件（150）连接，且光缆（140）由FMC组件（150）的第一端（150a）伸出，FMC组件（150）包括插芯（1501），插芯（1501）设置在FMC组件（150）的第二端（150b）；主轴（160）套设于FMC组件（150）的第一端（150a），保护罩（170）套设于FMC组件（150）的第二端（150b），且保护罩（170）与主轴（160）固定连接；主轴（160）的远离保护罩（170）的一端与尾套（130）连接，主轴（160）的远离保护罩（170）的一端用于固定光缆（140）；手柄（120）套设于保护罩（170）以及主轴（160）外侧。

Description

一种光纤连接头以及光纤连接器
本申请要求于2019年07月26日提交中国专利局、申请号为201910683577.X、发明名称为“一种光纤连接头以及光纤连接器”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及光通信技术领域，尤其涉及一种光纤连接头以及光纤连接器。
背景技术
随着现代社会的发展、信息量的爆炸增长，人们对网络吞吐能力的需求不断提高。光传输凭借其独有的超高带宽，低电磁干扰等特性，逐渐成为现代通信的主流方案，尤其是现阶段新建的网络，以光纤到户(fiber to the home，FTTH)为代表的接入网，正在大规模的部署。
在光纤到户网络建设中，从光线路终端(optical line terminal，OLT)到用户的光纤终端盒(access terminal box，ATB)，中间需要依次经过馈线段光缆、配线段光缆以及入户段光缆，其中，入户段光缆用于连接分纤盒和光纤终端盒，在FTTH网络的入户段光缆的布放过程中，一种做法是熔接，即在分纤盒内分配好对应每户的光纤端头，将每户的光纤端头和入户光缆用光纤熔接机在分纤盒内进行熔接，再将入户光缆铺设到每家每户。在入户光缆的另一端，也需要进行一次现场熔接，以便和每家每户的光纤终端盒连接起来。这种做法带来的问题是需要专用的光纤熔接设备，对操作人员的技术要求较高，操作起来过程繁琐、不便利。
发明内容
本申请实施例提供了一种光纤连接头以及光纤连接器，使得该光纤连接头方便在室外与适配器即插即用，操作简单快捷，安全可靠。
第一方面，本申请实施例提供了一种光纤连接头，包括：手柄、尾套、光缆、现场连接器(field mountable connector，FMC)组件、主轴以及保护罩，光缆的一端与FMC组件连接，且光缆由FMC组件的第一端伸出，FMC组件包括插芯，插芯设置在FMC组件的第二端；主轴套设于FMC组件的第一端，保护罩套设于FMC组件的第二端，且保护罩与主轴固定连接；主轴的远离保护罩的一端与尾套连接,主轴的远离保护罩的一端用于固定光缆，手柄套设于保护罩以及主轴外侧。
在该实施方式中，本申请实施例中的光纤连接头由于采用了FMC组件来接入光缆，可以根据客户需要或者安装现场实际需要的光缆长度，由安装人员灵活裁剪进而得到实际所需长度的光缆，在安装现场即可对剪裁后的光缆端部进行组装，例如，先组装为FMC组件，然后再将手柄、尾套、主轴以及保护罩等与FMC组件组装在一起，进而现场组装出光纤连接头。可见，本实施例中的光纤连接头的光缆长度可以在施工现场灵活设置，有利于节约光缆，且组装方便快捷。另外，通过在FMC组件外套设主轴、保护罩、手柄以及尾套来组装光纤连接头，可以以此对FMC组件进行保护使其满足IP68防护等级，由于FMC组件得到 了有效的防护，使得该光纤连接头方便在室外与适配器即插即用，操作简单快捷，安全可靠。另外，采用FMC组件的光纤连接头，由于可以现场组装和拆卸，如果在使用过程中插芯或FMC组件损坏，仅需要更换FMC组件即可，不需要更换整个带有光缆的光纤连接头，大大降低了后期维护费用，节约成本。
可选地，在一些可能的实施方式中，保护罩包括罩体和由罩体一端延伸形成的固定套，固定套插入主轴内，FMC组件贯穿固定套和罩体，且罩体套设于插芯外侧。在该实施方式中，罩体套设于插芯外侧，用于实现对插芯的保护，在现场安装该光纤连接头时，通过将固定套插入主轴内，可以快速实现对保护罩的定位，有利于快速实现保护罩的轴线与主轴的轴线之间的对准，进而快速安装。
可选地，在一些可能的实施方式中，主轴远离保护罩的一端的内壁形成有轴肩，FMC组件的第一端与轴肩抵接。可以防止FMC组件沿主轴的轴向朝着远离保护罩的方向滑动。
可选地，在一些可能的实施方式中，主轴的远离保护罩的一端包括固定部和由固定部的端面延伸形成的压接结构，固定部和压接结构套设于光缆外侧，固定部的外壁形成有外螺纹，尾套的内壁设有内螺纹，尾套套设于固定部和压接结构外，且尾套上的内螺纹与固定部上的外螺纹旋接，以使压接结构固定光缆。本实施例中，由于光缆与FMC组件连接，且光缆被主轴上的压接结构压紧，可以进一步防止FMC组件在主轴内沿主轴的轴向前后运动。
可选地，在一些可能的实施方式中，压接结构包括至少两个悬臂梁，至少两个悬臂梁的固定端与固定部连接，至少两个悬臂梁的可动端的内壁形成有凸点结构，至少两个悬臂梁的可动端用于压紧光缆。在该实施方式中，提供了一种压接结构的具体实现方式，提高了本方案的实用性，并且凸点结构可以增加光缆的抗拉性能。
可选地，在一些可能的实施方式中，固定套的外径小于罩体的外径，以方便固定套可以插入主轴内，并且罩体靠近固定套的端面上可以有区域设置固定结构与主轴进行固定连接。
可选地，在一些可能的实施方式中，主轴上设有第一固定结构，保护罩上设有第二固定结构，第一固定结构与第二固定结构卡合固定连接，以防止保护罩沿着主轴的轴向前后运动。另外，主轴和保护罩之间采用卡合固定的连接方式，能够更加方便光纤连接头的安装和拆卸，相比于螺纹连接，能够大大缩短现场组装以及拆卸光纤连接头的时间。
可选地，在一些可能的实施方式中，第一固定结构为卡扣，第二固定结构为卡槽；或者第一固定结构为卡槽，第二固定结构为卡扣。在该实施方式中，提供了一种第一固定结构和第二固定结构的具体实现方式，提高了本方案的可实现性。
可选地，在一些可能的实施方式中，第一固定结构为卡扣，设于主轴的朝向保护罩的端面上；第二固定结构为卡槽，设于罩体的靠近固定套的端面上。在该实施方式中，卡扣和卡槽分别设置在主轴和罩体的端面上，便于卡扣与卡槽扣合且空间更紧凑。
可选地，在一些可能的实施方式中，光纤连接头还包括销钉，第一固定结构为第一插孔，第二固定结构为第二插孔，销钉用于插入第一插孔以及第二插孔。在该实施方式中，提供了另一种主轴与保护罩进行固定的实现方式，提高了本方案的扩展性。
可选地，在一些可能的实施方式中，光纤连接头还包括卡簧，第一固定结构为第一凹槽，第二固定结构为第二凹槽，卡簧用于插入第一凹槽以及第二凹槽。在该实施方式中，提供了另一种主轴与保护罩进行固定的实现方式，进一步提高了本方案的扩展性。
可选地，在一些可能的实施方式中，主轴的朝向保护罩的端面与罩体的靠近固定套的端面通过胶水粘接在一起。在该实施方式中，除了通过设置第一固定结构和第二固定结构外，还可以直接通过胶水将保护罩与主轴固定，提高了本方案的灵活性。
可选地，在一些可能的实施方式中，主轴的朝向保护罩的端面上设有定位键，罩体的靠近固定套的端面上设有定位槽；或者，主轴的朝向保护罩的端面上设有定位槽，罩体的靠近固定套的端面上设有定位键；定位键插入定位槽。在该实施方式中，可以防止固定套插入主轴后在主轴内转动，并进一步防止固定套向主轴内滑动。
可选地，在一些可能的实施方式中，固定套的内腔与FMC组件匹配，以避免固定套相对于FMC组件旋转。
可选地，在一些可能的实施方式中，保护罩的背离主轴的端部设有一个开口，使得保护罩的背离主轴的端部的横截面呈C形，且开口可以呈喇叭形，即开口端部具有弧面，起导向作用，有利于引导光纤连接头插入适配器中。
可选地，在一些可能的实施方式中，光缆上靠近FMC组件的一端外部设有光缆密封圈，能够防止外界的异物、水气、灰尘等由光缆与尾套或主轴之间的缝隙进入光纤连接头内部，主轴上靠近保护罩的一端外部设有主轴密封圈，从而防止外界的异物、水气、灰尘等由手柄与主轴之间的缝隙进入光纤连接头内部，使得光纤连接头的密封性更好。
可选地，在一些可能的实施方式中，光纤连接头还包括防尘帽，防尘帽与手柄上远离尾套的一端连接。防尘帽可以在光纤连接头插入适配器之前起到防尘防水并保护FMC组件的作用。
可选地，在一些可能的实施方式中，手柄上远离尾套的一端的内壁上设有凸出的锁紧结构，防尘帽的的一端的外表面设有锁紧凹槽，锁紧结构用于与锁紧凹槽扣合，防尘帽上靠近手柄的一端外部设有防尘帽密封圈。锁紧结构与锁紧凹槽扣合可以使手柄与防尘帽固定，防尘帽密封圈使防尘帽在与手柄扣合时形成良好的密封作用。
可选地，在一些可能的实施方式中，手柄远离尾套的一端的外表面上设有指示标识，用于指示手柄的连接状态或松开状态。方便现场安装时直观的了解光纤连接头的连接状态。
可选地，在一些可能的实施方式中，手柄靠近尾套的一端的外表面形成有两个对称的削平平面，削平平面上形成有沟槽。在操作手柄与防尘帽进行固定时，可以夹持削平平面进行旋转操作，从而防止打滑。沟槽可以进一步提高摩擦力，以增加操作手感。
第二方面，本申请实施例提供了一种光纤连接器，包括适配器以及如第一方面任一实施方式中的光纤连接头，适配器的一端设有空腔以及围绕空腔的插槽，光纤连接头的FMC组件插入适配器的空腔内，光纤连接头的保护罩插入插槽内。
可选地，在一些可能的实施方式中，适配器的一端的外表面设有滑槽，光纤连接头的手柄上远离尾套的一端的内壁上设有凸出的锁紧结构，锁紧结构滑动连接于滑槽。
从以上技术方案可以看出，本申请实施例具有以下优点：
本申请实施例中的光纤连接头由于采用了FMC组件来接入光缆，可以根据客户需要或者安装现场实际需要的光缆长度，由安装人员灵活裁剪进而得到实际所需长度的光缆，在安装现场即可对剪裁后的光缆端部进行组装，例如，先组装为FMC组件，然后再将手柄、尾套、主轴以及保护罩等与FMC组件组装在一起，进而现场组装出光纤连接头。可见，本实施例中的光纤连接头的光缆长度可以在施工现场灵活设置，有利于节约光缆，且组装方便快捷。另外，通过在FMC组件外套设主轴、保护罩、手柄以及尾套来组装光纤连接头，可以以此对FMC组件进行保护使其满足IP68防护等级，由于FMC组件150得到了有效的防护，使得该光纤连接头方便在室外与适配器即插即用，操作简单快捷，安全可靠。另外，采用FMC组件的光纤连接头，由于可以现场组装和拆卸，如果在使用过程中插芯或FMC组件损坏，仅需要更换FMC组件即可，不需要更换整个带有光缆的光纤连接头，大大降低了后期维护费用，节约成本。
附图说明
图1为本申请应用的网络架构图；
图2为本申请中光纤连接器的结构示意图；
图3为本申请中光纤连接头的外部结构示意图；
图4为本申请中光纤连接头的爆炸分解图；
图5为本申请中光纤连接头的剖视图；
图6a为本申请中FMC组件的爆炸分解图；
图6b为本申请中FMC组件的剖视图；
图7为本申请中主轴上压接结构的示意图；
图8为本申请中手柄上锁紧结构的示意图；
图9为本申请中带有防尘帽的光纤连接头的结构示意图；
图10a为本申请中主轴与保护罩通过卡扣固定的结构示意图；
图10b为本申请中主轴上定位槽的结构示意图；
图10c为本申请中保护罩上定位键的结构示意图；
图11为本申请中主轴与保护罩通过销钉固定的结构示意图；
图12为本申请中主轴与保护罩通过卡簧固定的结构示意图；
图13为本申请中适配器的结构示意图；
图14为本申请中适配器的爆炸分解图。
具体实施方式
本申请实施例提供了一种光纤连接头以及光纤连接器，该光纤连接头可以在现场装配，即插即用，且该光纤连接头的光缆长度可以在施工现场灵活设置，有利于节约光缆，且组装方便快捷。
为便于理解，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实 施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
图1为FTTx的光网络的一部分，FTTx可以是FTTH(fiber to the home，光纤到户)，还可以是FTTC(fiber to the curb，光纤到路边)，还可以是FTTP(fiber to the premises，光纤到驻地)，还可以是FTTN(fiber to the node or neighborhood，光纤到节点)，还可以是FTTO(fiber to the office，光纤到办公室)，或者是FTTSA(fiber to the service area，光纤到服务区)。以FTTH网络为例，从中心机房(centre office，CO)的下游看，FTTH包括馈线链路1、1：N分路器2、配线链路3、1：m分路器4、以及至少一个分支链路5，在本申请中，应用于户外环境的光纤连接器适用于上述分支链路5。虽然，本申请是以FTTx结构的一种类型的网络为例，其他网络结构也适用。
图2为本申请的光纤连接器10，如图2所示，光纤连接器10包括光纤连接头100、光纤连接头300和光纤适配器200。其中，光纤连接头100通过光纤适配器200与另一个光纤连接头300进行连接，实现内部光纤的对接。
图3为光纤连接头100的外部结构示意图，从光纤连接头100的外部整体上来看，光纤连接头100包括防尘帽110、手柄120、尾套130以及光缆140。
图4为光纤连接头100的爆炸分解图，从内部结构可以看出，光纤连接头100还包括现场连接器(field mountable connector，FMC)组件150、主轴160以及保护罩170，其中，手柄120和尾套130套设在主轴160以及保护罩170的外侧，进一步主轴160以及保护罩170套设在FMC组件150的外侧。
图5为光纤连接头100的剖视图，光缆140的一端与FMC组件150的一端连接，且光缆140由FMC组件150的第一端150a伸出，FMC组件150包括插芯1501，插芯1501设置在FMC组件150的第二端150b，主轴160套设于该FMC组件150的第一端150a外，保护罩170套设于该FMC组件150的第二端150b外，且主轴160与保护罩170固定连接。手柄120套设于主轴160以及保护罩170外侧，尾套130与主轴160的远离保护罩170的一端连接，且主轴16的远离保护罩170的一端用于固定光缆140。
请参阅图6a所示的FMC组件的爆炸分解图以及图6b所示的FMC组件的剖视图，FMC组件150可以包括插芯1501、插芯固定部1502、外框套1503、底座1504、弹簧1505以及FMC尾套1506，光缆140接入底座1504并剥开为光纤，进而光纤贯穿插芯固定部1502并与插芯1501连接，插芯固定部1502用于固定插芯1501并保护光纤，外框套1503套设于插芯1501以及插芯固定部1502外侧，外框套1503与底座1504靠近插芯1501的一端固定连接，底座1504远离插芯1501的一端与FMC尾套1506通过螺纹旋接，弹簧1505固定在底座1504的内壁，弹簧1505靠近插芯1501的一端与插芯固定部1502抵接，用于对插芯1501及插芯固定部1502提供支撑，并使插芯1501具有伸缩性。
具体的，在工作人员现场组装时，首先可以根据实际需求裁剪任意长度的光缆140，接着将光缆140依次接入底座1504、插芯固定部1502以及插芯1501，随后将外框套1503套设于插芯1501以及插芯固定部1502外侧，并与底座1504固定，再将FMC尾套1506套设于底座1504外侧，并与底座1504通过螺纹旋接，以此完成光缆140接入FMC组件150 的安装，进而在FMC组件150外侧套设主轴160、保护罩170、手柄120以及尾套130，以完成光纤连接头100的组装。需要说明的是，本申请中的光缆140可以包括蝶缆、圆缆、扁平缆等各种缆型，具体此处不做限定。
在一实施例中，保护罩170包括罩体171和由罩体171一端延伸形成的固定套172，该固定套172插入主轴160内，且罩体171套设于插芯1501外侧，实现对插芯1501的保护。在现场安装该光纤连接头100时，通过将固定套172插入主轴160内，可以快速实现对保护罩170的定位，有利于快速实现保护罩170的轴线与主轴160的轴线之间的对准，进而快速安装。固定套172内部的空腔可以与FMC组件150的外框套1503匹配，例如，固定套172内部空腔的横截面可以为方形，且FMC组件150的外框套1503的横截面也可以为方形，且两者之间大小匹配，进而避免固定套172相对于FMC组件150旋转。
相对于现有技术中不可现场组装的室外光纤连接头，其光缆长度在出厂前就已经固定，施工现场不能更改，例如，厂家一般会生产多种规格的光纤连接头，比如光纤连接头的光缆长度分别为50米、100米以及200米等规格，如果施工现场仅需60米长的光缆，那么在施工过程中，仍然需要为客户配备光缆长度为100米规格的光纤连接头，势必会造成40米长的光缆浪费。
本申请实施例中的光纤连接头100由于采用了FMC组件150来接入光缆140，可以根据客户需要或者安装现场实际需要的光缆长度，由安装人员灵活裁剪进而得到实际所需长度的光缆，在安装现场即可对剪裁后的光缆端部进行组装，例如，先组装为FMC组件150，然后再将手柄120、尾套130、主轴160以及保护罩170等与FMC组件150组装在一起，进而现场组装出光纤连接头100。可见，本实施例中的光纤连接头100的光缆长度可以在施工现场灵活设置，有利于节约光缆，且组装方便快捷。另外，通过在FMC组件150外套设主轴160、保护罩170、手柄120以及尾套130来组装光纤连接头100，可以以此对FMC组件150进行保护使其满足IP68防护等级，由于FMC组件150得到了有效的防护，使得该光纤连接头100方便在室外与适配器200即插即用，操作简单快捷，安全可靠。另外，采用FMC组件的光纤连接头，由于可以现场组装和拆卸，如果在使用过程中插芯或FMC组件损坏，仅需要更换FMC组件即可，不需要更换整个带有光缆的光纤连接头，大大降低了后期维护费用，节约成本。
请参阅图4和图5，在一实施例中，光缆140上靠近FMC组件150的一端外部设有光缆密封圈141，能够防止外界的异物、水气、灰尘等由光缆140与尾套130或主轴160之间的缝隙进入光纤连接头100内部。
在一实施例中，主轴160上靠近保护罩170的一端外部设有主轴密封圈164，从而防止外界的异物、水气、灰尘等由手柄120与主轴160之间的缝隙进入光纤连接头100内部，使得光纤连接头100的密封性更好。
在一实施例中，主轴160远离保护罩170的一端的内壁形成有轴肩161，该轴肩161与FMC组件150的第一端150a抵接，可以防止FMC组件150沿主轴160的轴向朝着远离保护罩170的方向滑动，对FMC组件150起到限位作用。
在一实施例中，主轴160的远离保护罩170的一端包括固定部162和由固定部162的 端面延伸形成的压接结构163，该固定部162和压接结构163套设于光缆140外侧，固定部162的外壁形成有外螺纹，尾套130的内壁设有内螺纹，尾套130套设于固定部162和压接结构163外，且尾套130上的内螺纹与固定部162上的外螺纹旋接，以使得压接结构163固定光缆140。
请参阅图7，在一实施例中，压接结构163可以包括两个悬臂梁1631，这两个悬臂梁1631的固定端连接在固定部162上，这两个悬臂梁1631的可动端的内壁上均设有凸点结构1632，该凸点结构1632的数量具体此处不做限定。尾套130的内腔可以略小于两个悬臂梁1631在自然状态下形成的外围，进而在尾套130上的内螺纹与固定部162上的外螺纹旋紧的过程中，会压紧两个悬臂梁1631的可动端向光缆140的方向挤压以夹紧该光缆140，其中，凸点结构1632可以增加光缆140的抗拉性能。由于光缆140与FMC组件150连接，且光缆140被主轴160上的压接结构163压紧，可以防止FMC组件150在主轴160内沿主轴160的轴向前后运动。需要说明的是，压接结构163可以包括数量更多的悬臂梁1631，例如三个、四个等，具体此处不做限定。在其他实施例中，压接结构163也可以为一圆筒状的结构，且该圆筒状的结构由弹性材料制成，尾套130的内腔可以略小于圆筒状结构的外围，进而在尾套130上的内螺纹与固定部162上的外螺纹旋紧的过程中，尾套130会挤压弹性的压接结构163，进而固定光缆140。
在一实施例中，手柄120为内部具有台阶面的圆筒结构，其中，手柄120内部的台阶面与主轴160靠近保护罩170的一端抵接，以防止手柄120向远离尾套130的方向滑动，在尾套130与固定部162旋紧后，尾套130可以与手柄120抵接，以防止手柄120向靠近尾套130的方向滑动。除了上述介绍的方式外，也可以有固定手柄120的其他方式，例如，主轴160的外表面设有滑槽，手柄120的内表面设有凸缘，通过旋转手柄可以使凸缘与滑槽扣合以固定手柄，具体此处不做限定。
请参阅图8，在一实施例中，手柄120远离尾套130的一端的内壁上设有凸出的锁紧结构1201，该锁紧结构1201可以为圆柱形的凸块，其数量可以是1个也可以是多个，具体此处不做限定。
请参阅图9，在一实施例中，防尘帽110通过一绳带栓系在光纤连接头100上，防尘帽110主要是为了在光纤连接头100插入适配器200之前起到防尘防水并保护FMC组件150的作用。为了使防尘帽110在与手柄120扣合时形成良好的密封作用，该防尘帽110外部设有防尘帽密封圈111。防尘帽110的一端开设有光纤连接头110的收容腔，该收容腔沿防尘帽110的轴向延伸，可以收容光纤连接头100中的保护罩170以及FMC组件150与外部相连的一端。防尘帽110的外表面设有至少一个锁紧凹槽112，该锁紧凹槽112的数量与手柄120上锁紧结构1201的数量相同，锁紧结构1201用于与锁紧凹槽112扣合，以使得防尘帽110与手柄120固定。
在一实施例中，该手柄120远离尾套130的一端的外表面上设有指示标识121，以指示手柄120的连接或松开状态。该手柄120靠近尾套130的一端的外表面上设有削平平面122，在操作手柄120与防尘帽110进行固定时，可以夹持削平平面122进行旋转操作，从而防止打滑。为了进一步提高摩擦力，还可以在削平平面122上形成防滑沟槽，以增加操 作手感。需要说明的是，削平平面122可以是对称的一对，也可以是对称的多对，如两对、三对等，具体此处不做限定。
请参阅图10a，在一实施例中，保护罩170的背离主轴160的端部设有一个开口1703，使得保护罩170的背离主轴160的端部的横截面呈C形，即该保护罩170是周面上有一个开口1703的C形罩。
当然在其他实施例中，该保护罩170的周面上也可以有不止一个开口1703，例如可以包括2个开口、3个开口等，具体此处不做限定。上述开口1703可以呈喇叭形，即开口1703端部具有弧面，起导向作用，有利于引导光纤连接头100插入适配器200中。
在一实施例中，为了在保护FMC组件150的基础上防止保护罩170沿主轴160的轴向运动，固定套172插入主轴160内，且在主轴靠近保护罩170的端面上设有第一固定结构1601，在罩体171靠近固定套172的端面上设有第二固定结构1701，第一固定结构1601与第二固定结构1701卡合，以使得主轴160与保护罩170固定连接。主轴和保护罩之间采用卡合固定的连接方式，能够更加方便光纤连接头的安装和拆卸，相比于主轴和保护罩采用螺纹连接的光纤连接头，能够大大缩短现场组装以及拆卸光纤连接头的时间。经过试验，本实施例提供的光纤连接头的安装和拆卸时间只有采用螺纹连接方式的光线连接头的安装和拆卸时间的1/5。
可以理解的是，为了使固定套172插入主轴160，并方便设置第二固定结构1701，该固定套172的外径小于罩体171的外径。另外，第一固定结构1601可以设置在主轴160端面上的任意位置，第二固定结构1701可以设置在罩体171端面上的任意位置，以C形罩为例，该第二固定结构1701可以设置在罩体171的端面上与开口1703所对应的位置。
请参阅图10b以及图10c，在一实施例中，为了防止固定套171插入主轴160后在主轴160内转动，并进一步防止固定套171向主轴160内滑动，该主轴160靠近保护罩170的端面上设有定位槽1602，与之相对的在罩体171靠近固定套172的端面上设有定位键1702，该定位键1702可以插入定位槽1602，当然也可以是主轴160靠近保护罩170的端面上设有定位键1702，罩体171靠近固定套172的端面上设有定位槽1602，另外该定位键1702与定位槽1602可以是一组，也可以有多组，具体此处不做限定。
上述第一固定结构1601以及第二固定结构1701的实现方式可以有多种，下面分别进行介绍：
请参阅图10a，在一实施例中，第一固定结构1601可以是卡扣，第二固定结构1701可以是卡槽，卡扣与卡槽扣合以使得主轴160与保护罩170固定，除此之外，第一固定结构1601也可以是卡槽，而第二固定结构1701可以是卡扣，并且卡扣以及与之对应卡槽可以设置一组，也可以设置多组，具体此处不做限定。
请参阅图11，在一实施例中，该光纤连接头100还可以包括销钉180，第一固定结构1601可以是第一插孔，第二固定结构1701可以是第二插孔，该销钉180可以插入第一插孔以及第二插孔，以使得第一插孔和第二插孔固定，可以理解的是，该销钉180、第一插孔以及第二插孔可以设置一组，也可以设置多组，具体此处不做限定。
请参阅图12，在一实施例中，该光纤连接头还可以包括卡簧190，第一固定结构1601 可以是第一凹槽，第二固定结构1701可以是第二凹槽，该卡簧190可以插入第一凹槽以及第二凹槽，以使得第一凹槽和第二凹槽固定，可以理解的是，该卡簧190、第一凹槽以及第二凹槽可以设置一组，也可以设置多组，具体此处不做限定。
除了上述列举的几种方式外，还可以有其他的方式将保护罩170与主轴160固定，例如，可以将主轴160的朝向保护罩170的端面与罩体171的靠近固定套172的端面通过胶水粘接在一起，具体此处不做限定。
上面对本申请实施例中的光纤连接头100进行了描述，下面对本申请中的光纤连接器10进行介绍：
如图2所示，光纤连接器10除了包括上述的光纤连接头100外，还包括适配器200。下面请参阅图13，所述光纤适配器200的一端设置有插座201。
所述插座201开设有空腔2011及插槽2012，所述空腔2011位于所述插座201中部，所述空腔2011及插槽2012沿所述插座201轴向延伸。所述插槽2012环绕在所述空腔2011的外围。光纤连接头100中的FMC组件150可以插入所述空腔2011内，光纤连接头100中的保护罩170可以插入所述插槽2012内。若保护罩170是C形罩，那么插槽2012还可以设有一沿着所述插座201轴向延伸的条状凸块2014，使得插槽2012的截面形成C形，该条状凸块2014与C形罩的开口宽度相当，插槽2012可以与C形罩无缝连接，实现了上述光纤连接头100的盲插，操作更简便，进而可以实现光纤连接器10的即插即用。
在一实施例中，光纤插座201外周开设有第二滑槽2015，所述滑槽2015呈螺旋形，所述滑槽2015从所述插座201一端沿所述插座201周向延伸，且所述滑槽2015延伸的末端卡合手柄120上的锁紧结构1201。所述光纤插座201外表面设有箭头标识和“0”“1”标识，当所述光纤连接头100插入所述光纤插座201时，手柄120上的标识121应当对准插座201的箭头标识，并且当朝向“0”的方向拧转，所述光纤连接头100处于锁紧状态；当朝向“1”的方向拧转，所述光纤连接头100处于松开状态。本实施方式中，所述滑槽2015可以与防尘帽110上的锁紧凹槽112的形状相同。
请参阅图14所示的适配器200的爆炸分解图，在一实施例中，光纤适配器200包含O形密封圈222、锁紧螺母220、O形密封圈240、插座主体210、陶瓷套管212。其中，所述O形密封圈240、锁紧螺母220、O形密封圈222依次套设于所述插座主体210上，所述陶瓷套管212插入所述插座主体210的另一端，通过O形密封圈222紧固，插座主体210的一端设置有插座201，另一端设置有插座202，插座201和202，以及其中心放置的陶瓷套管212，可通过超声波焊接在一起。
在一实施例中，所述光纤适配器200包括一适配器防尘帽230，所述适配器防尘帽230一端开设有收容所述光纤适配器200的适配器收容腔，所述收容腔用于当所述光纤适配器200插入到所述防尘帽230中，收容所述插座201。
以上所述，仅为本发明较佳的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到的变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应该以权利要求的保护范围为准。

Claims (17)

  1. 一种光纤连接头，其特征在于，包括：手柄、尾套、光缆、现场连接器FMC组件、主轴以及保护罩；
    所述光缆的一端与所述FMC组件连接，且所述光缆由所述FMC组件的第一端伸出，所述FMC组件包括插芯，所述插芯设置在所述FMC组件的第二端；
    所述主轴套设于所述FMC组件的第一端，所述保护罩套设于所述FMC组件的第二端，且所述保护罩与所述主轴固定连接；
    所述主轴的远离所述保护罩的一端与所述尾套连接,所述主轴的远离所述保护罩的一端用于固定所述光缆；
    所述手柄套设于所述保护罩以及所述主轴外侧。
  2. 根据权利要求1所述的光纤连接头，其特征在于，所述保护罩包括罩体和由所述罩体一端延伸形成的固定套，所述固定套插入所述主轴内，所述FMC组件贯穿所述固定套和所述罩体，且所述罩体套设于所述插芯外侧。
  3. 根据权利要求1或2所述的光纤连接头，其特征在于，所述主轴远离所述保护罩的一端的内壁形成有轴肩，所述FMC组件的第一端与所述轴肩抵接。
  4. 根据权利要求1至3中任一项所述的光纤连接头，其特征在于，所述主轴的远离所述保护罩的一端包括固定部和由所述固定部的端面延伸形成的压接结构，所述固定部和所述压接结构套设于所述光缆外侧，所述固定部的外壁形成有外螺纹，所述尾套的内壁设有内螺纹，所述尾套套设于所述固定部和所述压接结构外，且所述尾套上的内螺纹与所述固定部上的外螺纹旋接，以使所述压接结构固定所述光缆。
  5. 根据权利要求4所述的光纤连接头，其特征在于，所述压接结构包括至少两个悬臂梁，所述至少两个悬臂梁的固定端与所述固定部连接，所述至少两个悬臂梁的可动端的内壁形成有凸点结构，所述至少两个悬臂梁的可动端用于压紧所述光缆。
  6. 根据权利要求1至5中任一项所述的光纤连接头，其特征在于，所述固定套的外径小于所述罩体的外径。
  7. 根据权利要求1至6中任一项所述的光纤连接头，其特征在于，所述主轴上设有第一固定结构，所述保护罩上设有第二固定结构，所述第一固定结构与所述第二固定结构卡合固定连接。
  8. 根据权利要求7所述的光纤连接头，其特征在于，所述第一固定结构为卡扣，所述第二固定结构为卡槽；或者所述第一固定结构为卡槽，所述第二固定结构为卡扣。
  9. 根据权利要求8所述的光纤连接头，其特征在于，所述第一固定结构为卡扣，设于所述主轴的朝向所述保护罩的端面上；所述第二固定结构为卡槽，设于所述罩体的靠近所述固定套的端面上。
  10. 根据权利要求7所述的光纤连接头，其特征在于，所述光纤连接头还包括销钉，所述第一固定结构为第一插孔，所述第二固定结构为第二插孔，所述销钉用于插入所述第一插孔以及所述第二插孔。
  11. 根据权利要求7所述的光纤连接头，其特征在于，所述光纤连接头还包括卡簧， 所述第一固定结构为第一凹槽，所述第二固定结构为第二凹槽，所述卡簧用于插入所述第一凹槽以及所述第二凹槽。
  12. 根据权利要求1至6中任一项所述的光纤连接头，其特征在于，所述主轴的朝向所述保护罩的端面与所述罩体的靠近所述固定套的端面通过胶水粘接在一起。
  13. 根据权利要求1至12中任一项所述的光纤连接头，其特征在于，所述主轴的朝向所述保护罩的端面上设有定位键，所述罩体的靠近所述固定套的端面上设有定位槽；或者，所述主轴的朝向所述保护罩的端面上设有定位槽，所述罩体的靠近所述固定套的端面上设有定位键；所述定位键插入所述定位槽。
  14. 根据权利要求1至13中任一项所述的光纤连接头，其特征在于，所述固定套的内腔与所述FMC组件匹配，以防止所述固定套相对于所述FMC组件旋转。
  15. 根据权利要求1至14中任一项所述的光纤连接头，其特征在于，所述保护罩的背离所述主轴的端部设有一个开口，使得所述保护罩的背离所述主轴的端部的横截面呈C形。
  16. 根据权利要求1至15中任一项所述的光纤连接头，其特征在于，所述光缆上靠近所述FMC组件的一端外部设有光缆密封圈，所述主轴上靠近所述保护罩的一端外部设有主轴密封圈。
  17. 一种光纤连接器，其特征在于，包括：
    光纤连接头，所述光纤连接头为权利要求1至16中任一项所述的光纤连接头；
    适配器，所述适配器的一端设有空腔以及围绕所述空腔的插槽；
    所述光纤连接头的FMC组件的第二端插入所述适配器的空腔内，所述光纤连接头的保护罩插入所述插槽内。
PCT/CN2020/103973 2019-07-26 2020-07-24 一种光纤连接头以及光纤连接器 Ceased WO2021018015A1 (zh)

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EP3822677B1 (en) 2025-10-22
MY200351A (en) 2023-12-21
BR112021006001A2 (pt) 2021-06-29
JP7183400B2 (ja) 2022-12-05
ES3053680T3 (en) 2026-01-23
MX2021003630A (es) 2021-05-27
US20210181432A1 (en) 2021-06-17
CN110542952A (zh) 2019-12-06
CN110542952B (zh) 2021-05-18
EP3822677A4 (en) 2021-11-10
US11604318B2 (en) 2023-03-14
EP3822677A1 (en) 2021-05-19
JP2022500696A (ja) 2022-01-04

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