WO2019157660A1 - 光纤连接头、光纤适配器和光纤连接装置 - Google Patents

光纤连接头、光纤适配器和光纤连接装置 Download PDF

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Publication number
WO2019157660A1
WO2019157660A1 PCT/CN2018/076718 CN2018076718W WO2019157660A1 WO 2019157660 A1 WO2019157660 A1 WO 2019157660A1 CN 2018076718 W CN2018076718 W CN 2018076718W WO 2019157660 A1 WO2019157660 A1 WO 2019157660A1
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WIPO (PCT)
Prior art keywords
fiber optic
ferrule
connector
fiber
adapter
Prior art date
Application number
PCT/CN2018/076718
Other languages
English (en)
French (fr)
Inventor
吴文新
熊伟
李秀鹏
杨波
喻建雄
Original Assignee
华为技术有限公司
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 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201880001881.5A priority Critical patent/CN110494782A/zh
Priority to PCT/CN2018/076718 priority patent/WO2019157660A1/zh
Priority to ARP190100357A priority patent/AR114109A1/es
Publication of WO2019157660A1 publication Critical patent/WO2019157660A1/zh

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    • 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

Definitions

  • the present application relates to the field of communication devices, and more particularly to an optical fiber connector, a fiber optic adapter, and a fiber optic connection device.
  • Fiber optic connectors are used in fiber optic communication systems for connection between fiber optic cables, between fiber optic cables and optoelectronic components, and between optoelectronic components. It precisely pairs the two fiber ends that need to be connected so that the light energy output from the transmitting fiber can be coupled to the receiving fiber to the maximum extent.
  • the fiber to the home (FTTH) network construction there is usually at least one fiber distribution box at the user access point, and the input end of the fiber distribution box is installed with a central office (CO)
  • the connected distribution cable is installed at the output end of the household fiber optic cable connected to the user.
  • the placement and installation of the drop cable may be done in conjunction with the installation of the splitter box.
  • more operators choose to install the fiber-optic cables in batches according to the requirements of users after the installation of the fiber-optic boxes.
  • an "outdoor pre-connection scheme" for presetting the outdoor adapter on the fiber distribution box and presetting the outdoor connector on the drop cable came into being.
  • This technology can help operators realize the box that does not need to open the fiber-optic box, and does not need to use the "plug and play" of the fusion splicer, which greatly improves the user's access efficiency, and thus has been widely used.
  • the present application provides a fiber optic connector, a fiber optic adapter, and a fiber optic connection device that facilitates reducing the outer diameter of the fiber optic connector and the fiber optic adapter.
  • a fiber optic connector 100 including: a ferrule 180 disposed on an optical fiber extending from the optical cable 110; a frame member 150 disposed on an outer side of the ferrule 180, and the insertion
  • the first end of the core 180 protrudes from the first end of the frame member 150;
  • the ferrule protection member 140 is internally provided with a cavity, and is sleeved on the first end of the frame member 150, wherein
  • the ferrule protection member 140 is provided with a first end and a second end along an axial direction of the cavity, and the second end of the ferrule protection member 140 is coupled to the first end of the frame member 150, and A first end of the ferrule protection element 140 protrudes from the first end of the frame member 150 to protect the ferrule 180.
  • the fiber connector 100 of the embodiment of the present application has a small size of the fiber connector 100 by arranging the ferrule protection member 140 at one end of the frame member 150 and connecting the ferrule protection member 140 to the frame member 150.
  • the ferrule protection element 140 can be inserted directly into the cavity of the fiber optic adapter 200 that is mated with the fiber optic connector 100 to facilitate reducing the outer diameter of the fiber optic connector and the mating fiber optic adapter.
  • the fiber optic connector 100 further includes the fiber optic cable 110.
  • the optical fiber connector 100 of the embodiment of the present application may include the optical cable 110 or may not include the optical cable 110. This embodiment of the present application does not limit this. In the case where the optical fiber connector 100 does not include the optical cable 110, the optical cable 110 can be mounted in the optical fiber connector 100 by post-installation.
  • the ferrule protection element 140 and the frame member 150 are snap-fit or integrally formed.
  • the outer side of the frame member 150 is provided with a bump
  • the inner side of the ferrule protection member 140 is provided with a groove
  • the frame is provided.
  • the bump of the element 150 is adapted to the recess of the ferrule protection element 140 such that the ferrule protection element 140 and the frame element 150 achieve a snap-fit connection by the cooperation of the lug and the groove.
  • the outer side of the frame member 150 may be provided with a groove
  • the inner side of the ferrule protection member 140 is provided with a bump, which is not limited in the embodiment of the present application.
  • the ferrule protection component 140 further includes an alignment key 1406 disposed on an outer side of the ferrule protection component 140, and the alignment key 1406 A slot 2106 for aligning the fiber optic adapter 200 that is mated with the fiber optic connector 100 assists in aligning the fiber optic connector 100 into a cavity of the fiber optic adapter 200.
  • the shape of the alignment key 1406 can be, for example, a bump, a ridge, etc., and the end of the first end of the alignment key 1406 can be arcuate or tapered to facilitate guiding the alignment key 1406 into the slot of the fiber optic adapter 200.
  • an end surface of the first end of the ferrule protection element 140 protrudes from an end surface of the first end of the ferrule 180 to achieve a ferrule 180
  • the protection function prevents the end surface of the first end of the ferrule 180 of the optical fiber connector 100 from being contaminated by contact with other components.
  • the distance between the end face of the first end of the ferrule protection member 140 and the end face of the first end of the ferrule 180 is less than or equal to 1 mm.
  • the ferrule protection element 140 can be protected from the ferrule 180 without affecting the connection of the fiber optic connector 100 to the fiber in the opposite fiber optic connector 300 after insertion of the fiber optic adapter 200.
  • the end surface of the first end of the ferrule protection element 140 may be a circular shape, may be a C shape, or may be any other shape, which is not limited in the embodiment of the present application.
  • the first end of the ferrule protection element 140 is provided with at least two protruding keys 1405, the at least two protruding keys 1405 protruding from the insertion The first end of the core 180. If the first end of the fiber optic connector 100 is dropped down on the ground, the at least two protruding keys 1405 can serve as a support to protect the ferrule 180 from contamination and at the same time facilitate cleaning.
  • the width of the protruding key 1405 is greater than the diameter of the ferrule 180.
  • the at least two protruding keys 1405 can better serve as a support to protect the ferrule 180 from contamination.
  • the width of the protruding key 1405 refers to the distance between the two end points of the first end of the protruding key 1405 in a direction perpendicular to the axial direction of the cavity of the ferrule protecting member 140. It should also be understood that the diameter of the ferrule 180 is the diameter of the circle corresponding to the end face of the first end of the ferrule 180.
  • the at least two protruding keys 1405 are evenly distributed over an end surface of the first end of the ferrule protection element 140.
  • three protruding keys 1405 are evenly distributed over the end faces of the first end of the ferrule protection element 140.
  • the three protruding keys 1405 can play a good supporting role regardless of the manner in which the optical fiber connector 100 is dropped on the ground.
  • the ferrule 180 is not contaminated.
  • the width of the protruding key 1405 may not be limited, and the ferrule 180 may be better protected, and at the same time, it is convenient to clean.
  • the fiber optic connector 100 further includes: a connector 138 disposed on an outer side of the cable 110, the connector 138 being protected from the ferrule
  • the inner side of one end of the component 140 is adhered to the reinforcing member of the optical cable of the optical cable 110; wherein an opening 1381 is provided at an end of the connecting member 138 away from the ferrule protecting member 140 to facilitate the injection of glue in the connection.
  • the inside of the piece 138 is further provided with a potting plug 124 to prevent the glue from flowing in the direction of the ferrule protecting member 140. Reliable, high mechanical strength of the cable and connector can be achieved by means of glue filling.
  • the fiber optic connector 100 further includes: a locking cap 130 sleeved outside the ferrule protection component 140, and the ferrule protection component 140 The first end protrudes from the first end of the locking cap 130.
  • the locking cap 130 is a stepped circular tube structure, and adopts a rotary locking method of a mature and reliable aviation connector.
  • the inner surface has two protruding locking points 1304, and the screw lock of the optical fiber adapter 200 is connected.
  • the tight groove 2105 is fastened to achieve a locking connection.
  • another optical fiber connector 100 including: a ferrule 180 disposed on an optical fiber extending from the optical cable 110; an inner sleeve member 190 having a cavity therein and sleeved on the ferrule 180
  • the outer sleeve member 190 is provided with a first end and a second end along the axial direction of the cavity, the inner sleeve member 190 is sleeved on the outer side of the ferrule 180, and the insert
  • a second end of the core 180 is adjacent the second end of the inner sleeve member 190, and a first end of the inner sleeve member 190 protrudes from the first end of the ferrule 180 to protect the ferrule 180.
  • the optical fiber connector 100 of the embodiment of the present application is sleeved on the outer side of the ferrule 180 by the inner sleeve member 190, and the first end of the inner sleeve member 190 protrudes from the first end of the ferrule 180, and the size of the inner sleeve member 190 Smaller, the fiber connector 100 is smaller in size, and the inner sleeve member 190 can be directly inserted into the cavity of the fiber optic adapter 200 that is mated with the fiber connector 100, thereby facilitating the reduction of the fiber optic connector and matching.
  • the outer diameter of the fiber optic adapter is sleeved on the outer side of the ferrule 180 by the inner sleeve member 190, and the first end of the inner sleeve member 190 protrudes from the first end of the ferrule 180, and the size of the inner sleeve member 190 Smaller, the fiber connector 100 is smaller in size, and the inner sleeve member 190 can
  • the fiber optic connector 100 further includes the fiber optic cable 110.
  • the distance between the end face of the first end of the inner sleeve member 190 and the end face of the first end of the ferrule 180 is less than or equal to 1 mm.
  • the inner sleeve member 190 further includes an alignment key 1406 disposed on an outer side of the inner sleeve member 190, and the alignment key 1406 is for Aligning the slot 2106 of the fiber optic adapter 200 that is mated with the fiber optic connector 100 assists in aligning the fiber optic connector 100 into the cavity of the fiber optic adapter 200.
  • the first end of the inner sleeve member 190 is provided with at least two protruding keys 1405 protruding from the ferrule The first end of 180.
  • the width of the protruding key 1405 is greater than the diameter of the ferrule 180.
  • the at least two protruding keys 1405 are evenly distributed over an end surface of the first end of the inner sleeve member 190.
  • a fiber optic adapter 200 comprising: a first socket 210 having a cavity therein for receiving a ferrule protection element 140 of a fiber optic connector 100 that is adapted to the fiber optic adapter 200,
  • the cavity of the first socket 210 is internally provided with a slot 2106 for connecting the alignment key 1406 of the fiber optic connector 100, wherein the cross section of the alignment key 1406 is adapted to the cross section of the slot 2106.
  • the cavity of the fiber optic adapter 200 of the embodiment of the present application is capable of accommodating the ferrule protection member 140 of the fiber optic connector 100 that is adapted thereto, which is advantageous for reducing the outer diameter of the fiber optic connector and the matching fiber optic adapter.
  • the outer side of the first socket 210 is further provided with a torsion-proof element 2107 for connecting the limiting post 1504 of the optical fiber connector 100, wherein The section of the torsion-resistant element 2107 is adapted to the section of the limit post 1504.
  • the limiter 1504 on the fiber optic connector 100 will be inserted into the torsion component 2107 on the fiber optic adapter 200 to transmit the torque from the fiber optic cable to the fiber optic adapter 200 to ensure reliable fiber optic connection. connection.
  • the first socket 210 is disposed at a first end of the fiber optic adapter 200 for mating the installation of an outdoor connector; the fiber optic adapter 200 further includes The second socket 240 is disposed at the second end of the fiber optic adapter 200 for matching the installation of the indoor connector.
  • a fiber optic connector 10 comprising: a fiber optic adapter and the fiber optic connector 100 of any of the first aspect or the first aspect of the first aspect; or
  • the fiber optic adapter may be the fiber optic adapter 200 in any of the possible implementations of the third aspect or the third aspect; or may be a conventional fiber optic adapter.
  • the first end of the ferrule protection component 140 of the fiber optic connector 100 can be aligned into a cavity provided at the second end of the fiber optic adapter 200.
  • FIG. 1 is a schematic diagram of a communication network to which an embodiment of the present application is applied;
  • FIG. 2 is a schematic structural diagram of an optical fiber connecting device according to an embodiment of the present application.
  • FIG. 3 is a schematic structural diagram of an optical fiber connector provided by an embodiment of the present application.
  • FIG. 4 is a schematic structural diagram of a frame member provided by an embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of a ferrule protection element according to an embodiment of the present application.
  • FIG. 6 is a schematic structural view of a ferrule protection component provided on an outer side of a frame sleeve component according to an embodiment of the present application;
  • FIG. 7 is a cross-sectional view of an optical fiber connecting device according to an embodiment of the present application.
  • Figure 8 is a cross-sectional view of the frame member and the ferrule protection member provided by the embodiment of the present application.
  • FIG. 10 is a cross-sectional view of a fiber optic connector provided by an embodiment of the present application.
  • Figure 11 is a cross-sectional view of the connector provided by the embodiment of the present application.
  • FIG. 12 is a front projection view of a fiber optic connector provided by an embodiment of the present application.
  • FIG. 13 is another front projection view of the optical fiber connector provided by the embodiment of the present application.
  • FIG. 14 is a schematic structural diagram of a fiber optic adapter provided by an embodiment of the present application.
  • 15 is an exploded exploded view of a fiber optic adapter provided by an embodiment of the present application.
  • FIG. 16 is another schematic structural diagram of an optical fiber connector and a fiber adapter according to an embodiment of the present application.
  • FIG. 1 shows a part of the FTTx optical network.
  • the FTTx can be fiber to the home (FTTH), fiber to the curb (FTTC), or fiber to the station (fiber).
  • FTTPC which can also be fiber to the node or neighborhood (FTTN), fiber to the office (FTTOC), or fiber to the service (fiber to the service) Area, FTTSAC).
  • FTTH fiber to the home
  • FTTC fiber to the curb
  • FTTPC To the premises
  • FTTN fiber to the node or neighborhood
  • FTOC fiber to the office
  • FTTSAC fiber to the service Area
  • the FTTH includes a feeder link 1, a 1:N splitter 2, a wiring link 3, a 1:m splitter 4, and at least one Branch link 5, in the present application, an optical fiber connection device applied to an outdoor environment is applied to the above-described branch link 5.
  • the present application is exemplified by a type of network of FTTx architecture, it should be understood that the fiber optic connectors, fiber optic
  • the fiber to the home (FTTH) network construction there is usually at least one fiber distribution box at the user access point, and the input end of the fiber distribution box is installed with a central office (CO)
  • the connected distribution cable is installed at the output end of the household fiber optic cable connected to the user.
  • the placement and installation of the drop cable may be done in conjunction with the installation of the splitter box.
  • more operators choose to install the fiber-optic cables in batches according to the requirements of users after the installation of the fiber-optic boxes.
  • an "outdoor pre-connection scheme" for presetting the outdoor adapter on the fiber distribution box and presetting the outdoor connector on the drop cable came into being.
  • This technology can help operators realize the box that does not need to open the fiber-optic box, and does not need to use the "plug and play" of the fusion splicer, which greatly improves the user's access efficiency, and thus has been widely used.
  • the outdoor fiber optic connection device is the core component of the optical fiber pre-connected product. Generally, it requires IP68 protection level, anti-vibration and anti-loose connection locking method, and ferrule protection structure, which can realize insertion guide and prevent plugging, inserting, etc. Misoperation function, body material with outdoor environment adaptability, etc.
  • the outer diameter of the current outdoor fiber optic connector and the matched outdoor fiber optic adapter are large, resulting in a larger operation panel of the corresponding fiber distribution box, which is disadvantageous for the installation and design of the fiber distribution box.
  • the embodiments of the present application propose an optical fiber connector, a fiber optic adapter, and a fiber optic connection device.
  • FIG. 2 is a schematic structural diagram of a fiber optic connection device 10 according to an embodiment of the present application.
  • the fiber optic connection device 10 includes a fiber optic connector 100, a fiber optic adapter 200, and a fiber optic connector 300.
  • the fiber connector 100 can be connected to another fiber connector 300 through the fiber adapter 200 to achieve interconnection of the internal fibers.
  • the optical fiber connector 100 can be an outdoor fiber connector.
  • the fiber connector 300 can be a standard SC connector, an MPO connector, or other common fiber connectors. This is not limited.
  • first end the left end of all elements
  • second end the right end
  • FIG. 3 is a schematic diagram of a fiber optic connector 100 according to an embodiment of the present disclosure.
  • the fiber optic connector 100 includes a ferrule 180 that is sleeved on an optical fiber extending from the optical cable 110. a first end of the ferrule 180 protrudes from the first end of the frame member 150; the ferrule protection member 140 is internally provided with a cavity and a sleeve At a first end of the frame member 150, wherein the ferrule protection member 140 is provided with a first end and a second end along an axial direction of the cavity, and the second end of the ferrule protection member 140 A first end of the ferrule element 150 is coupled to the first end of the ferrule element 150 to protect the ferrule 180.
  • the optical fiber connector 100 of the embodiment of the present application is configured to sleeve the ferrule protection component 140 at one end of the frame component 150 and connect the ferrule protection component 140 to the frame component 150 such that the size of the optical fiber connector 100 is smaller. Small, the ferrule protection element 140 can be inserted directly into the cavity of the fiber optic adapter 200 that is mated with the fiber optic connector 100, thereby facilitating reduction of the outer diameter of the fiber optic connector and the mating fiber optic adapter.
  • the optical fiber connector 100 further includes a fiber optic cable 110.
  • the optical fiber connector 100 of the embodiment of the present application may include the optical cable 110 or may not include the optical cable 110. This embodiment of the present application does not limit this.
  • the optical cable 110 can be mounted in the optical fiber connector 100 by post-installation.
  • FIG. 4 shows a schematic structural view of the frame member 150, which is internally provided with a cavity for receiving the ferrule 180.
  • the frame member 150 can be sized to match the fiber optic adapter 200 and can be inserted into a standard SC adapter.
  • FIG. 5 shows a schematic view of a ferrule protection element 140 that is sized to match the fiber optic adapter 200.
  • the second end of the ferrule protection member 140 can be coupled to the first end of the frame member 150 and sleeved outside the first end of the frame member 150.
  • FIG. 6 shows a structural schematic view of the ferrule protection element 140 sleeved on the outside of the frame member 150. As shown in FIG.
  • the second end of the ferrule protection member 140 is connected to the first end of the frame member 150. And the first end of the ferrule protection element 140 protrudes from the first end of the frame member 150, and the first end of the ferrule protection member 140 protrudes from the first end of the ferrule 180 to achieve The protection of the ferrule 180.
  • the ferrule protection component 140 further includes an alignment key 1406 disposed outside the ferrule protection component 140, and the alignment key 1406 is used
  • a slot 2106 (shown in FIG. 16) of the fiber optic adapter 200 that is mated with the fiber optic connector 100 is aligned to assist in the alignment of the fiber optic connector 100 into the cavity of the fiber optic adapter 200.
  • the shape of the alignment key 1406 can be, for example, a bump, a ridge, or the like.
  • the end of the first end of the alignment key 1406 i.e., the end adjacent the protruding key 1405
  • the outer side of the ferrule protection member 140 is provided with a mesa, which may be a flat surface or a groove.
  • the alignment key 1406 may be disposed on the surface to facilitate guiding the alignment key 1406 into the slot 2106 of the optical fiber adapter 200.
  • an end surface of the first end of the ferrule protection member 140 protrudes from an end surface of the first end of the ferrule 180. This enables the protection function of the ferrule 180 to prevent the end surface of the first end of the ferrule 180 of the optical fiber connector 100 from being contaminated by contact with other components.
  • the distance between the end surface of the first end of the ferrule protection element 140 and the end surface of the first end of the ferrule 180 is less than or equal to 1 mm, so that the ferrule protection element 140 is protected.
  • the ferrule 180 does not affect the connection of the optical fiber connector 100 to the optical fiber in the opposite fiber connector 300 after the fiber adapter 200 is inserted.
  • end surface of the first end of the ferrule protection element 140 may be a circular shape, may be a C shape, or may be any other shape, which is not limited in the embodiment of the present application.
  • the first end of the ferrule protection member 140 is provided with at least two protruding keys 1405, and in FIG. 6, the at least two protruding keys 1405 protrude from The first end of the ferrule 180. If the first end of the fiber optic connector 100 is dropped down on the ground, the at least two protruding keys 1405 can serve as a support to protect the ferrule 180 from contamination.
  • the protruding key 1405 is a part of the ferrule protection member 140, and the first end of the ferrule protection member 140 refers to the protruding key
  • the first end of 1405 therefore, the end face of the first end of the ferrule protection member 140 protrudes from the end face of the first end of the ferrule 180, that is, the first end of the protruding key 1405 protrudes from the first end of the ferrule 180 end.
  • FIG. 7 shows a cross-sectional view of the fiber optic connection device 10 of the embodiment of the present application.
  • the ferrule 180 will be spliced with the ferrule of the opposite optical fiber connector 300.
  • the protruding key of the ferrule protection component 140 1405 does not affect the docking of the two ferrules, so it is necessary to limit the height of the protruding key 1405.
  • the height of the protruding key 1405 refers to the distance between the first end and the second end of the protruding key 1405.
  • the end face of the first end of the protruding key 1405 cannot be in contact with the outer casing of the optical fiber connector 300.
  • the connector is an SC-type connector
  • the distance between the end face of the first end of the protruding key 1405 and the end face of the first end of the ferrule 180 is less than or equal to 1 mm, so that the size of the optical fiber connecting device 10 can be further reduced.
  • the first end of the ferrule protection member 140 is provided with at least two protruding keys 1405.
  • the first end of the ferrule 180 The end face protrudes from the end face 1401 of the second end of the protruding key 1405, which facilitates cleaning of the end face of the first end of the ferrule 180.
  • the end surface of the first end of the ferrule 180 is located between the end surface of the first end of the at least two protruding keys 1405 and the end surface of the second end of the at least two protruding keys 1405, such that Not only can the at least two protruding keys 1405 protect the ferrule 180, but also the end face of the ferrule 180 can be cleaned.
  • the width of the protruding key 1405 is greater than the diameter of the ferrule 180.
  • the at least two protruding keys 1405 can better serve as a support to protect the ferrule 180 from contamination.
  • the width of the protruding key 1405 refers to the distance between the two end points of the first end of the protruding key 1405 in a direction perpendicular to the axial direction of the cavity of the ferrule protecting member 140, as shown in FIG.
  • the width of the protruding key 1405 is h.
  • the diameter of the ferrule 180 is the diameter of the circle corresponding to the end face of the first end of the ferrule 180.
  • the width of the two protruding keys 1405 needs to be larger than the diameter of the ferrule 180. If the first end of the fiber connector 100 is dropped down on the ground, and the axial direction of the fiber connector 100 is less than ninety degrees from the ground, the width of the two protruding keys 1405 is greater than the ferrule 180.
  • the diameter of the ferrule 180 is such that the end face of the first end of the ferrule 180 and the portion of the ferrule 180 that protrudes from the second end of the two protruding keys 1405 are not contaminated.
  • the at least two protruding keys 1405 are evenly distributed over the end faces of the first ends of the ferrule protection elements (140).
  • the number of the above-mentioned protruding keys 1405 may be three or may be other, which is not limited in the embodiment of the present application.
  • the three protruding keys 1405 can play a good supporting role regardless of the manner in which the optical fiber connector 100 is dropped on the ground.
  • the ferrule 180 is not contaminated.
  • the width of the protruding key 1405 may not be limited, and the ferrule 180 may be better protected, and at the same time, it is convenient to clean.
  • ferrule protection element 140 and the frame member 150 are snap-fit or integrally formed.
  • the ferrule protection component 140 and the frame sleeve component 150 may be connected by a snapping manner, or may be integrally formed, that is, as a new component - the inner sleeve component 190 (see the figure). 6)
  • the embodiment of the present application does not limit this.
  • the outer side of the frame member 150 is provided with a bump
  • the inner side of the ferrule protection member 140 is provided with a groove
  • the frame is provided.
  • the bump of the element 150 is adapted to the recess of the ferrule protection element 140 such that the ferrule protection element 140 and the frame element 150 achieve a snap-fit connection by the cooperation of the lug and the groove.
  • FIG. 8 shows a cross-sectional view of the ferrule protection member 140 and the frame member 150.
  • the inside of the ferrule protection member 140 is provided with two grooves 1402, and the outer side of the frame member 150 is provided with two convex portions. Block 1502, after the frame member 150 is inserted into the ferrule protection member 140, the frame member 150 and the ferrule protection member 140 are snap-fitted.
  • the outer side of the frame member 150 may be provided with a groove, and the inner side of the ferrule protection member 140 is provided with a bump, which is not limited in the embodiment of the present application.
  • the fiber optic connector 100 may further include a tail sleeve 120, a locking cap 130, a strap 160, and a dust cap 170.
  • the locking cap 130 is sleeved on the outer side of the ferrule protecting member 140, and the first end of the ferrule protecting member 140 protrudes from the first end of the locking cap 130. Further, the locking cap 130 is a stepped circular tube structure, and adopts a rotary locking method of a mature and reliable aviation connector.
  • the inner surface has two protruding locking points 1304 (see FIG. 12), and the fiber optic adapter is connected.
  • the screw locking groove 2105 (see Fig. 15) of the 200 is fastened to achieve a locking connection.
  • the first end of the locking cap 130 is provided with an arrow alignment mark to indicate the connection and release state of the fiber connector 100; the second end has a symmetrical flattened plane with a vertical shallow groove in the plane to Increase the operational feel.
  • the front end of the dust cap 170 and the outer surface of the mating portion of the connector have a symmetrical spiral locking groove and are provided with an O-ring 1702 which is tethered to the body of the fiber optic connector 100 by a strap 160. It should be understood that before the fiber connector 100 is inserted into the fiber optic adapter 200, the dust cap 170 is coupled to the locking cap 130 to provide protection against dust and water and to protect the ferrule 180.
  • the optical fiber connector 100 adopts a standard connector ferrule assembly and a housing protection structure.
  • the inner layer of the optical fiber connector 100 adopts a standard connector SC ferrule assembly (which may be an MPO, etc.), and the outer casing is protected on the optical cable.
  • the side forms the fixing of the cable reinforcement and the fixing and sealing of the cable protection sleeve, and adopts a mature and reliable aviation connector rotation locking manner on the mating side of the optical fiber adapter 200 to ensure the reliability of the connection and the anti-vibration and anti-loose performance.
  • the IP68 sealing effect is achieved by the sealing ring on the fiber optic adapter 200 and the outer casing of the fiber optic connector 100.
  • a dust cap 170 is mounted on the front end of the fiber optic connector 100, and an air connector rotation lock is also used between the dust cap 170 and the locking cap 130 of the fiber connector 100. In a tight manner, and through the sealing ring on the dust cap 170 to squeeze with the outer casing of the locking cap 130 to achieve IP68 sealing effect.
  • FIG. 9 is an exploded perspective view of the fiber optic connector 100 provided by the embodiment of the present application
  • FIG. 10 is a cross-sectional view of the fiber optic connector 100 provided by the embodiment of the present application.
  • the optical fiber connector 100 further includes a rubber heat shrinkable sleeve 122, a snap ring 126, an O-ring 132, and an O-ring 1702, as seen from the internal structure (see FIG. 9).
  • the spring 134, the connecting member 138, the ferrule base 151 and the potting plug 124 are provided.
  • the ferrule 180, the connecting member 138, the spring 134, and the locking cap 130 are sequentially sleeved on the optical cable 110. As shown in Fig.
  • an O-ring 132 for sealing is provided at one end of the ferrule 180, and a spring 134 for preventing loosening is also provided.
  • the other end is provided with a heat shrinkable sleeve 122 for fixing and sealing the cable 110.
  • tail sleeve 120 can be processed first and then finally put on, or can be finally casted by means of integral injection molding, and the tensile strength and the sealing property of the joint are increased, which is not limited in the embodiment of the present application.
  • the optical fiber connector 100 further includes a connecting member 138 disposed on an outer side of the optical cable 110, and the connecting member 138 is away from the ferrule protecting member 140.
  • the inner side of one end of the cable is adhered to the reinforcing member of the optical cable of the optical cable 110; wherein an opening 1381 is provided at an end of the connecting member 138 away from the ferrule protecting member 140 to facilitate the injection of glue at the connecting member 138.
  • the inner side is also provided with a potting plug 124 to prevent the glue from flowing in the direction of the ferrule protecting member 140.
  • the reinforcing member of the optical cable 110 such as aramid yarn
  • the glue and the connecting member 138 and the potting plug 124 may be adhered together by the glue and the connecting member 138 and the potting plug 124 to increase the tensile strength of the optical fiber connector 100.
  • the reinforcing member of the optical cable 110 can be glued at the tail portion of the connecting member 138 (for example, The aramid, steel wire, FRP, etc., other portions of the cable 110 (eg, sleeves, sleeves, etc.) and the inner walls of the connector 138 are bonded together.
  • a fitting member 124 for preventing the glue from flowing toward the head end of the connector is provided inside the connecting member 138, as shown in Fig. 11.
  • FIG. 12 and 13 are front elevational views of the fiber optic connector 100 showing the internal snap unlocking structure of the fiber optic connector 100.
  • 12 is an initial state of internal buckle of the optical fiber connector 100
  • FIG. 13 is an internal snap lock state of the optical fiber connector 100.
  • the locating key 1406 will mate with the slot 2106 on the adapter to perform alignment.
  • the two symmetrical locks on the inner surface of the cap 130 are locked by rotating the handle.
  • the tight point 1304 is engaged with the two symmetrical spiral locking grooves 2105 on the outer surface of the socket 201 to realize a double locking connection.
  • the handle is rotated, the fiber optic connector 100 and the fiber optic adapter 200 are in a mated state and do not follow the handle.
  • the locking cap 130 When it is necessary to pull out the fiber connector 100 from the fiber adapter 200, the locking cap 130 is rotated to move from the state shown in Fig. 12 to the state shown in Fig. 13.
  • the two symmetrical locking points 1304 of the inner surface of the locking cap 130 are unscrewed from the two symmetrical helical locking grooves 2105 of the outer surface of the socket 201.
  • the optical fiber connector 100 can be pulled out from the optical fiber adapter 200. Out.
  • the locking cap 130 can be rotated by 45 degrees to complete the locking and unlocking process of the connector.
  • a limiting post 1504 is designed on the locking cap 130
  • a left and right limiting platform 1306 is designed on the locking cap 130.
  • the present application further provides another fiber connector 100.
  • the fiber connector 100 includes a ferrule 180 that is sleeved on the optical fiber extending from the cable 110.
  • the inner sleeve member 190 has a cavity and a sleeve.
  • the outer end of the ferrule 180 is adjacent to the second end of the inner sleeve member 190, and the first end of the inner sleeve member 190 protrudes from the first end of the ferrule 180 to protect The ferrule 180.
  • the ferrule protection member 140 and the frame member 150 are integrally formed, that is, as the inner sleeve member 190.
  • the distance between the end face of the first end of the inner sleeve member 190 and the end face of the first end of the ferrule 180 is less than or equal to 1 mm.
  • the fiber connector 100 further includes a ferrule base 151 (shown in FIG. 9).
  • the ferrule 180 is fixed on the ferrule base 151, and the inner sleeve member 190 and the ferrule base 151 can be coupled to the ferrule base 151. fixed.
  • the inner sleeve member 190 can also be directly fixed to the ferrule 180, which is not limited in this embodiment of the present application.
  • the inner sleeve member 190 in this embodiment may also include the alignment key 1406, the at least two protruding keys 1405, and the like in the above embodiment.
  • the optical fiber connector 100 in this embodiment may also include the tail sleeve 120, the locking cap 130, the cord 160, the dust cap 170, and the like in the above embodiments, which are similar to the above, and are not described herein again.
  • the fiber optic connector 100 in this embodiment also has all of the benefits of the fiber optic connector 100 of the various embodiments described above. It should also be understood that the optical fiber connector 100 in this embodiment may or may not include an optical cable. For details, refer to the above embodiments.
  • FIG. 14 shows a schematic diagram of a fiber optic adapter 200 of an embodiment of the present application, including: a first socket 210 having a cavity therein for receiving a ferrule protection component of the fiber optic connector 100 that is adapted to the fiber optic adapter 200 140.
  • the cavity of the first socket 210 is internally provided with a slot 2106 for connecting an alignment key 1406 of the fiber connector 100, wherein a cross section of the alignment key 1406 is opposite to the slot 2106. Cross section fit.
  • the cavity of the fiber optic adapter 200 of the embodiment of the present application is capable of accommodating the ferrule protection member 140 of the fiber optic connector 100 that is adapted thereto, which is advantageous for reducing the outer diameter of the fiber optic connector and the matching fiber optic adapter.
  • the first socket 210 is disposed at a first end of the fiber optic adapter 200 for matching the installation of the outdoor connector; the fiber optic adapter 200 further includes: a second socket 240 disposed at The second end of the fiber optic adapter 200 is used to match the installation of the indoor connector.
  • the optical fiber adapter 200 is a left-right asymmetric structure.
  • the fiber optic adapter 200 may further include an O-ring 250 , a lock nut 220 , and a dust cap 230 .
  • the fiber optic adapter 200 also has a ceramic sleeve 212 inside.
  • the socket 210, the socket 240, and the ceramic sleeve 212 may be ultrasonically welded together or injection molded at one time.
  • two symmetrical spiral locking grooves 2105 are provided on the outer surface of the socket 210, and are engaged with the locking points of the inner surface of the locking cap 130 during the connection to realize the locking connection.
  • the internal structure of the dust cap 230 is similar to that of the locking cap 130, and its inner surface has two symmetrical protruding locking points, and the lock nut 220 allows the adapter to be mounted on the outer wall of the node device. Before the fiber connector 100 is inserted into the fiber optic adapter 200, the dust cap 230 is coupled to the socket 210 to provide dust and water resistance.
  • a torsion-proof component 2107 is further disposed on the outer side of the first socket 210 for connecting the limiting post 1504 of the optical fiber connector 100, wherein The section of the torsion-resistant element 2107 is adapted to the section of the limit post 1504.
  • the arrow on the fiber optic connector 100 is aligned with the "O" on the adapter, at this time on the ferrule protection component 140.
  • the locating key 1406 is inserted into the slot 2106 on the fiber optic adapter 200, and the ferrule protection element 140 is inserted into the cavity 2011.
  • the locking point 1304 of the fiber optic connector 100 slides into the screw locking slot 2105 of the fiber optic adapter, and rotates the locking cap 130 such that the locking point 1304 slides to the end of the chute 2015. Achieve locking.
  • the limiter 1504 on the fiber optic connector 100 will be inserted into the torsion component 2107 on the fiber optic adapter 200 to transmit the torque from the fiber optic cable to the fiber optic adapter 200 to ensure reliable fiber optic connection. connection.

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Abstract

一种光纤连接头（100）、光纤适配器（200）和光纤连接装置，光纤连接头（100）包括：插芯（180），套设于光缆延伸出的光纤上；框套元件（150），套设于插芯（180）的外侧，且插芯（180）的第一端凸出于框套元件（150）的第一端；插芯保护元件（140），内部设有空腔，套设于框套元件（150）的第一端，其中，插芯保护元件（140）沿空腔的轴向设有第一端和第二端，插芯保护元件（140）的第二端与框套元件（150）的第一端连接，且插芯保护元件（140）的第一端凸出于框套元件（150）的第一端，以保护插芯（180）。如此，光纤连接头（100）的尺寸较小，有利于减小光纤连接装置以及相匹配的光纤适配器（200）的外径。

Description

光纤连接头、光纤适配器和光纤连接装置 技术领域
本申请涉及通信设备领域，更具体地，涉及一种光纤连接头、光纤适配器和光纤连接装置。
背景技术
光纤连接器是在光纤通讯系统中用于光缆之间，光缆和光电部件之间、以及光电部件之间进行连接。它是把两个需要连接的光纤端面精密地对接起来，以使发射光纤输出的光能量能最大限度地耦合到接收光纤中去。
在光纤到户(fiber to the home，FTTH)网络建设中，通常在用户接入点处有至少有一个分纤箱，该分纤箱的输入端安装的是和中心机房(central office，CO)连通的配线光缆，输出端安装的是和用户连通的入户光缆。入户光缆的布放和安装可能会连同分纤箱的安装一起完成。在实际情况下，出于成本考虑，更多的运营商选择在分纤盒安装完成后，根据用户的要求进行入户光缆的分批安装。在此情况下，在分纤箱上预置室外型适配器以及在入户缆上预置室外连接头的“室外预连接方案”应运而生。此种技术能够帮助运营商实现无需开启分纤盒的盒体，无需使用熔接机的“即插即用”，极大地提高了用户的接入效率，从而得到了广泛的应用。
但是，目前的室外光纤连接器以及相匹配的室外光纤适配器的外径较大，导致相应的分纤箱的操作面板较大，不利于分纤箱的安装和设计。如何减小光纤连接器以及相匹配的光纤适配器的外径成为一项亟待解决的问题。
发明内容
本申请提供一种光纤连接头、光纤适配器和光纤连接装置，有利于减小光纤连接器以及光纤适配器的外径。
第一方面，提供了一种光纤连接头100，包括：插芯180，套设于光缆110延伸出的光纤上；框套元件150，套设于所述插芯180的外侧，且所述插芯180的第一端凸出于所述框套元件150的第一端；插芯保护元件140，内部设有空腔，套设于所述框套元件150的第一端，其中，所述插芯保护元件140沿所述空腔的轴向设有第一端和第二端，所述插芯保护元件140的第二端与所述框套元件150的第一端连接，且所述插芯保护元件140的第一端凸出于所述框套元件150的第一端，以保护所述插芯180。
本申请实施例的光纤连接头100通过将插芯保护元件140套设于框套元件150的一端，并将插芯保护元件140与框套元件150连接，使得该光纤连接头100的尺寸较小，插芯保护元件140能够直接插入到与该光纤连接头100适配的光纤适配器200的空腔内，从而有利于减小光纤连接装置以及相匹配的光纤适配器的外径。
结合第一方面，在第一方面的某些实现方式中，所述光纤连接头100还包括所述光缆 110。
应理解，本申请实施例的光纤连接头100可以包括光缆110，也可以不包括光缆110，本申请实施例对此不作限定。在光纤连接头100不包括光缆110的情况下，可以通过后期安装，将光缆110安装于上述光纤连接头100中。
结合第一方面，在第一方面的某些实现方式中，所述插芯保护元件140和所述框套元件150卡合连接或一体成型。
具体而言，在上述插芯保护元件140和框套元件150卡合连接的情况下，框套元件150的外侧设有凸块，插芯保护元件140的内侧设有凹槽，且该框套元件150的凸块与该插芯保护元件140的凹槽适配，从而使得插芯保护元件140和框套元件150通过凸块和凹槽的配合实现卡合连接。应理解，在另一种可能的实现方式中，也可以是框套元件150的外侧设有凹槽，插芯保护元件140的内侧设有凸块，本申请实施例对此不作限定。
结合第一方面，在第一方面的某些实现方式中，所述插芯保护元件140还包括：对准键1406，设于所述插芯保护元件140的外侧，且所述对准键1406用于对准与所述光纤连接头100适配的光纤适配器200的插槽2106，辅助所述光纤连接头100对准插入到所述光纤适配器200的空腔内。
对准键1406的形状例如可以为凸块、凸条等，对准键1406的第一端的端部可以呈弧面或锥面设置，以便于引导对准键1406进入光纤适配器200的插槽2106内。
结合第一方面，在第一方面的某些实现方式中，所述插芯保护元件140的第一端的端面凸出于所述插芯180的第一端的端面，实现对插芯180的保护功能，从而避免该光纤连接头100的插芯180的第一端的端面接触到其它部件而受到污染。
结合第一方面，在第一方面的某些实现方式中，所述插芯保护元件140的第一端的端面与所述插芯180的第一端的端面之间的距离小于或等于1mm。
这样，能够使得插芯保护元件140在保护插芯180的同时，不影响光纤连接头100在插入光纤适配器200后和对端光纤连接头300中光纤的连接。应理解，上述插芯保护元件140的第一端的端面可以为圆形，可以为C形，还可以为其他任意形状，本申请实施例对此不作限定。
结合第一方面，在第一方面的某些实现方式中，所述插芯保护元件140的第一端设有至少两个突出键1405，所述至少两个突出键1405凸出于所述插芯180的第一端。若光纤连接头100的第一端朝下掉落在地面上，该至少两个突出键1405能够起到支撑作用，从而保护插芯180不受污染且同时方便清洁。
结合第一方面，在第一方面的某些实现方式中，所述突出键1405的宽度大于所述插芯180的直径。这样，该至少两个突出键1405能够更好地起到支撑作用，从而保护插芯180不受污染。
应理解，突出键1405的宽度是指在与该插芯保护元件140的空腔的轴向垂直的方向上，突出键1405的第一端的两个端点之间的距离。还应理解，插芯180的直径为插芯180的第一端的端面所对应的圆的直径。
结合第一方面，在第一方面的某些实现方式中，所述至少两个突出键1405均匀分布于所述插芯保护元件140的第一端的端面。例如，三个突出键1405均匀分布于插芯保护元件140的第一端的端面。
若插芯保护元件140的第一端设有三个突出键1405，那么无论该光纤连接头100以何种方式掉落在地面，这三个突出键1405都可以起到很好的支撑作用，保护插芯180不受污染。在这种情况下，可以不对突出键1405的宽度进行限定，也可以对插芯180起到较好的保护作用，且同时方便清洁。
结合第一方面，在第一方面的某些实现方式中，所述光纤连接头100还包括：连接件138，套设于所述光缆110的外侧，所述连接件138远离所述插芯保护元件140的一端的内侧与所述光缆110的光缆的加强件粘连；其中，在所述连接件138远离所述插芯保护元件140的一端设有开口1381，便于胶水的注入，在所述连接件138的内侧还设有灌胶堵件124，防止胶水向所述插芯保护元件140的方向流动。通过灌胶的方式，能够实现光缆和连接器可靠的、高机械强度的固定。
结合第一方面，在第一方面的某些实现方式中，所述光纤连接头100还包括：锁紧帽130，套设于所述插芯保护元件140外侧，且所述插芯保护元件140的第一端凸出于所述锁紧帽130的第一端。
可选地，锁紧帽130为阶梯状的圆管结构，借鉴成熟可靠的航空连接器旋转锁紧方式，其内表面有2个突出的锁紧点1304，连接时与光纤适配器200的螺旋锁紧槽2105扣合，实现锁紧连接。
第二方面，提供了另一种光纤连接头100，包括：插芯180，套设于光缆110延伸出的光纤上；内套元件190，内部设有空腔，套设于所述插芯180的外侧；其中，所述内套元件190沿所述空腔的轴向设有第一端和第二端，所述内套元件190套设于所述插芯180的外侧，且所述插芯180的第二端靠近所述内套元件190的第二端，所述内套元件190的第一端凸出于所述插芯180的第一端，以保护所述插芯180。
本申请实施例的光纤连接头100通过将内套元件190套设于插芯180的外侧，且内套元件190的第一端凸出于插芯180的第一端，内套元件190的尺寸较小，使得该光纤连接头100的尺寸较小，内套元件190能够直接插入到与该光纤连接头100适配的光纤适配器200的空腔内，从而有利于减小光纤连接装置以及相匹配的光纤适配器的外径。
结合第二方面，在第二方面的某些实现方式中，所述光纤连接头100还包括所述光缆110。
结合第二方面，在第二方面的某些实现方式中，所述内套元件190的第一端的端面和所述插芯180的第一端的端面之间的距离小于或等于1mm。
结合第二方面，在第二方面的某些实现方式中，所述内套元件190还包括：对准键1406，设于所述内套元件190的外侧，且所述对准键1406用于对准与所述光纤连接头100适配的光纤适配器200的插槽2106，辅助所述光纤连接头100对准插入到所述光纤适配器200的空腔内。
结合第二方面，在第二方面的某些实现方式中，所述内套元件190的第一端设有至少两个突出键1405，所述至少两个突出键1405凸出于所述插芯180的第一端。
结合第二方面，在第二方面的某些实现方式中，所述突出键1405的宽度大于所述插芯180的直径。
结合第二方面，在第二方面的某些实现方式中，所述至少两个突出键1405均匀分布于所述内套元件190的第一端的端面。
第三方面，提供了一种光纤适配器200，包括：第一插座210，内部设有空腔，用于容纳与所述光纤适配器200适配的光纤连接头100的插芯保护元件140，所述第一插座210的空腔内部设有插槽2106，用于连接所述光纤连接头100的对准键1406，其中，所述对准键1406的截面与所述插槽2106的截面适配。
本申请实施例的光纤适配器200的空腔能够容纳与其适配的光纤连接头100的插芯保护元件140，有利于减小光纤连接装置以及相匹配的光纤适配器的外径。
结合第三方面，在第三方面的某些实现方式中，所述第一插座210的外侧还设有抗扭元件2107，用于连接所述光纤连接头100的限位柱1504，其中，所述抗扭元件2107的截面与所述限位柱1504的截面适配。
插入后光纤连接头100上的限位健1504将和光纤适配器200上的抗扭部件2107配合，将光纤连接头200可能承受的、来自光缆扭力传递到光纤适配器200，以保证光纤连接装置的可靠连接。
结合第三方面，在第三方面的某些实现方式中，所述第一插座210设于所述光纤适配器200的第一端，用于匹配室外连接器的安装；所述光纤适配器200还包括：第二插座240，设于所述光纤适配器200的第二端，用于匹配室内连接器的安装。
第四方面，提供了一种光纤连接装置10，包括：光纤适配器和上述第一方面或第一方面的任意可能的实现方式中的光纤连接头100；或者
包括光纤适配器和上述第二方面或第二方面的任意可能的实现方式中的光纤连接头100；
在一实现方式中，光纤适配器可以为上述第三方面或第三方面的任意可能的实现方式中的光纤适配器200；或者，也可以为现有普通的光纤适配器。
其中，所述光纤连接头100的插芯保护元件140的第一端能够对准插入到所述光纤适配器200的第二端设有的空腔内。
附图说明
图1是本申请实施例应用的通信网络的示意图；
图2是本申请实施例提供的光纤连接装置的结构示意图；
图3是本申请实施例提供的光纤连接头的结构示意图；
图4是本申请实施例提供的框套元件的结构示意图；
图5是本申请实施例提供的插芯保护元件的结构示意图；
图6是本申请实施例提供的插芯保护元件套设在框套元件外侧的结构示意图；
图7是本申请实施例提供的光纤连接装置的剖视图；
图8是本申请实施例提供的框套元件和插芯保护元件的剖视图；
图9是本申请实施例提供的光纤连接头的爆炸分解图；
图10是本申请实施例提供的光纤连接头的剖视图；
图11是本申请实施例提供的连接件的剖视图；
图12是本申请实施例提供的光纤连接头的正面投影示意图；
图13是本申请实施例提供的光纤连接头的另一正面投影示意图；
图14是本申请实施例提供的光纤适配器的结构示意图；
图15是本申请实施例提供的光纤适配器的爆炸分解图；
图16是本申请实施例提供的光纤连接头和光纤适配器的另一结构示意图。
具体实施方式
下面将结合附图，对本申请中的技术方案进行描述。
图1为FTTx的光网络的一部分，FTTx可以是光纤到户(fiber to the home，FTTH)，还可以是无纤到路边(fiber to the curb，FTTC)，还可以是光纤到驻地(fiber to the premises，FTTPC)，还可以是光纤到节点(fiber to the node or neighborhood，FTTN)，还可以是光纤到办公室(fiber to the office，FTTOC)，或者是光纤到服务区(fiber to the service area，FTTSAC)。以FTTH网络为例，从中心机房(center 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装置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，但应理解，本申请的光纤连接头、光纤适配器和光纤连接器也可适用于其他网络结构中。
在光纤到户(fiber to the home，FTTH)网络建设中，通常在用户接入点处有至少有一个分纤箱，该分纤箱的输入端安装的是和中心机房(central office，CO)连通的配线光缆，输出端安装的是和用户连通的入户光缆。入户光缆的布放和安装可能会连同分纤箱的安装一起完成。在实际情况下，出于成本考虑，更多的运营商选择在分纤盒安装完成后，根据用户的要求进行入户光缆的分批安装。在此情况下，在分纤箱上预置室外型适配器以及在入户缆上预置室外连接头的“室外预连接方案”应运而生。此种技术能够帮助运营商实现无需开启分纤盒的盒体，无需使用熔接机的“即插即用”，极大地提高了用户的接入效率，从而得到了广泛的应用。
室外光纤连接装置是光纤预连接产品中的核心部件，一般要求达到IP68防护等级、具有防振防松的连接锁紧方式、有插芯保护结构，能实现插入导向及防止插反、插错等误操作的功能、具有室外环境适应性的主体材料等。目前的室外光纤连接器以及相匹配的室外光纤适配器的外径较大，导致相应的分纤箱的操作面板较大，不利于分纤箱的安装和设计。有鉴于此，本申请实施例提出了一种光纤连接头、光纤适配器和光纤连接装置。
图2示出了本申请实施例提供的光纤连接装置10的结构示意图，该光纤连接装置10包括光纤连接头100、光纤适配器200和光纤连接头300。其中，光纤连接头100可以通过光纤适配器200与另一个光纤连接头300进行连接，实现内部光纤的对接。
在本申请实施例中，光纤连接头100可以为室外光纤连接头，光纤连接头300可以为标准的SC连接器，也可以为MPO连接器，还可以为其他普通光纤连接器，本申请实施例对此不作限定。
下面对图2中的光纤连接头100和光纤适配器200进行详细说明。
应理解，在本文中，为了便于描述和理解，以图中放置方向为准，所有元件的左端称为“第一端”，右端称为“第二端”。
图3示出了本申请实施例提供的光纤连接头100的示意图，如图3所示，该光纤连接头100包括：插芯180，套设于光缆110延伸出的光纤上；框套元件150，套设于所述插芯180的外侧，且所述插芯180的第一端凸出于所述框套元件150的第一端；插芯保护元 件140，内部设有空腔，套设于所述框套元件150的第一端，其中，所述插芯保护元件140沿所述空腔的轴向设有第一端和第二端，所述插芯保护元件140的第二端与所述框套元件150的第一端连接，且所述插芯保护元件140的第一端凸出于所述框套元件150的第一端，以保护所述插芯180。
本申请实施例的光纤连接头100通过将插芯保护元件140套设于框套元件150的一端，并将将插芯保护元件140与框套元件150连接，使得该光纤连接头100的尺寸较小，插芯保护元件140能够直接插入到与该光纤连接头100适配的光纤适配器200的空腔内，从而有利于减小光纤连接器以及相匹配的光纤适配器的外径。
可选地，上述光纤连接头100还包括光缆110。应理解，本申请实施例的光纤连接头100可以包括光缆110，也可以不包括光缆110，本申请实施例对此不作限定。在光纤连接头100不包括光缆110的情况下，可以通过后期安装，将光缆110安装于上述光纤连接头100中。
进一步地，图4示出了框套元件150的一个结构示意图，该框套元件150内部设有空腔，该空腔用于容纳插芯180。该框套元件150的尺寸可以匹配光纤适配器200，并且可以插入到标准的SC适配器中。图5示出了插芯保护元件140的一个结构示意图，该插芯保护元件140的尺寸可以匹配光纤适配器200。该插芯保护元件140的第二端可以与该框套元件150的第一端连接，并套设在该框套元件150的第一端的外侧。图6示出了插芯保护元件140套设在框套元件150外侧的一个结构示意图，如图6所示，该插芯保护元件140的第二端与该框套元件150的第一端连接，且该插芯保护元件140的第一端凸出于该框套元件150的第一端，并且该插芯保护元件140的第一端凸出于插芯180的第一端，以实现对插芯180的保护。
作为一个可选的实施例，如图5所示，所述插芯保护元件140还包括：对准键1406，设于所述插芯保护元件140的外侧，且所述对准键1406用于对准与所述光纤连接头100适配的光纤适配器200的插槽2106(如图16所示)，辅助所述光纤连接头100对准插入到所述光纤适配器200的空腔内。
应理解，对准键1406的形状例如可以为凸块、凸条等。如图5所示，对准键1406的第一端(即靠近所述突出键1405的一端)的端部呈弧面或锥面设置，以便于引导对准键1406进入光纤适配器200的插槽2106内。此外，插芯保护元件140的外侧设有台面，台面可以为平面，或者为凹槽，对准键1406可以设置在该台面上，以更加便于引导对准键1406进入光纤适配器200的插槽2106内。
作为一个可选的实施例，所述插芯保护元件140的第一端的端面凸出于所述插芯180的第一端的端面。这样能够实现对插芯180的保护功能，从而避免该光纤连接头100的插芯180的第一端的端面接触到其它部件而受到污染。
作为一个可选的实施例，所述插芯保护元件140的第一端的端面与所述插芯180的第一端的端面之间的距离小于或等于1mm，使得插芯保护元件140在保护插芯180的同时，不影响光纤连接头100在插入光纤适配器200后和对端光纤连接头300中光纤的连接。
应理解，上述插芯保护元件140的第一端的端面可以为圆形，可以为C形，还可以为其他任意形状，本申请实施例对此不作限定。
作为一个可选的实施例，如图5所示，所述插芯保护元件140的第一端设有至少两个 突出键1405，在图6中，所述至少两个突出键1405凸出于所述插芯180的第一端。若光纤连接头100的第一端朝下掉落在地面上，该至少两个突出键1405能够起到支撑作用，从而保护插芯180不受污染。
应理解，在该插芯保护元件140的第一端设有突出键1405的情况下，突出键1405为插芯保护元件140的一部分，上述插芯保护元件140的第一端指的是突出键1405的第一端，因此，插芯保护元件140的第一端的端面凸出于插芯180的第一端的端面，即为突出键1405的第一端凸出于插芯180的第一端。
图7示出了本申请实施例的光纤连接装置10的剖视图。如图7所示，当光纤连接头100插入到光纤适配器200后，其中，插芯180将和对端的光纤连接头300的插芯进行对接，在此状态下，插芯保护元件140的突出键1405不能影响这两个插芯的对接，因此，有必要对突出键1405的高度进行限制。
应理解，在本文中，突出键1405的高度是指突出键1405的第一端和第二端之间的距离。当2个连接头处于连接状态以及插入时，突出键1405的第一端的端面不能和光纤连接头300的外壳接触。当连接器是SC型连接头时，突出键1405第一端的端面与插芯180的第一端的端面的距离小于或等于1mm，从而能够进一步减小光纤连接装置10的尺寸。
作为一个可选的实施例，如图5和图6所示，插芯保护元件140的第一端设有至少两个突出键1405，在该光纤连接头100中，插芯180的第一端的端面凸出于该突出键1405的第二端的端面1401，这样能够便于对插芯180的第一端的端面进行清洁。
换句话说，在本申请实施例中，插芯180的第一端的端面位于至少两个突出键1405的第一端的端面和该至少两个突出键1405的第二端的端面之间，这样不仅能够使该至少两个突出键1405保护插芯180，而且有利于插芯180的端面清洁。
作为一个可选的实施例，所述突出键1405的宽度大于所述插芯180的直径。这样，该至少两个突出键1405能够更好地起到支撑作用，从而保护插芯180不受污染。
应理解，突出键1405的宽度是指在与该插芯保护元件140的空腔的轴向垂直的方向上，突出键1405的第一端的两个端点之间的距离，如图5所示，突出键1405的宽度即为h。还应理解，插芯180的直径为插芯180的第一端的端面所对应的圆的直径。
特别地，当上述突出键1405的个数为两个的时候，这两个突出键1405的宽度需要大于插芯180的直径。若该光纤连接头100的第一端朝下掉落在地面上，且该光纤连接头100的轴向方向与地面的夹角小于九十度，上述两个突出键1405的宽度大于插芯180的直径，才能实现对插芯180的保护，使得插芯180的第一端的端面以及插芯180凸出于上述两个突出键1405的第二端的那一部分不受污染。
作为一个可选的实施例，所述至少两个突出键1405均匀分布于所述插芯保护元件(140)的第一端的端面。上述突出键1405的个数可以为三个，也可以为其他，本申请实施例对此不作限定。
若插芯保护元件140的第一端设有三个突出键1405，那么无论该光纤连接头100以何种方式掉落在地面，这三个突出键1405都可以起到很好的支撑作用，保护插芯180不受污染。在这种情况下，可以不对突出键1405的宽度进行限定，也可以对插芯180起到较好的保护作用，且同时方便清洁。
作为一个可选的实施例，所述插芯保护元件140和所述框套元件150卡合连接或一体 成型。
在本申请实施例中，上述插芯保护元件140和框套元件150可以是通过卡合方式连接起来的，也可以是一体成型的，即作为一个新的元件——内套元件190(参见图6)，本申请实施例对此不作限定。
具体而言，在上述插芯保护元件140和框套元件150卡合连接的情况下，框套元件150的外侧设有凸块，插芯保护元件140的内侧设有凹槽，且该框套元件150的凸块与该插芯保护元件140的凹槽适配，从而使得插芯保护元件140和框套元件150通过凸块和凹槽的配合实现卡合连接。
图8示出了插芯保护元件140和框套元件150的剖视图，如图8所示，插芯保护元件140的内侧设有两个凹槽1402，框套元件150的外侧设有两个凸块1502，使得该框套元件150插入该插芯保护元件140之后，该框套元件150和该插芯保护元件140卡合连接。
应理解，在另一种可能的实现方式中，也可以是框套元件150的外侧设有凹槽，插芯保护元件140的内侧设有凸块，本申请实施例对此不作限定。
作为一个可选的实施例，在图3中，上述光纤连接头100还可以包括尾套120、锁紧帽130、绳带160以及防尘帽170。
锁紧帽130套设于所述插芯保护元件140的外侧，且该插芯保护元件140的第一端凸出于该锁紧帽130的第一端。进一步地，锁紧帽130为阶梯状的圆管结构，借鉴成熟可靠的航空连接器旋转锁紧方式，其内表面有2个突出的锁紧点1304(参见图12)，连接时与光纤适配器200的螺旋锁紧槽2105(参见图15)扣合，实现锁紧连接。锁紧帽130的外观上第一端设有箭头对准标识，以指示光纤连接头100的连接和松开状态；第二端有对称的削平平面，平面内有竖向的浅沟槽，以增加操作手感。
防尘帽170的前端和连接头匹配部分的外部结构外表面有对称的螺旋锁紧槽，并装有O型密封圈1702，通过绳带160拴系在光纤连接头100的主体上。应理解，在光纤连接头100插入到光纤适配器200前，防尘帽170是与锁紧帽130连接在一起的，起到防尘防水并保护插芯180的作用。
在本申请实施例中，光纤连接头100采用标准连接器插芯组件加外壳保护的结构，该光纤连接头100内层采用标准连接器SC插芯组件(可以是MPO等)，外壳保护在光缆侧形成光缆加强件的固定以及光缆保护套的固定和密封，在和光纤适配器200的配合侧采用成熟可靠的航空连接器旋转锁紧方式，以保证连接的可靠性和防振防松性能，并通过光纤适配器200上的密封圈以和光纤连接头100的外壳挤压达成IP68密封效果。在光纤连接头100插入到光纤适配器200之前，有一防尘帽170装在光纤连接头100的前端，该防尘帽170和光纤连接头100的锁紧帽130之间也采用航空连接器旋转锁紧方式，并通过防尘帽170上的密封圈以和锁紧帽130的外壳挤压达成IP68密封效果。
图9示出了本申请实施例提供的光纤连接头100的爆炸分解图，图10示出了本申请实施例提供的光纤连接头100的剖视图。结合图9和图10可知，从内部结构看(具体参见图9)，该光纤连接头100还包括带胶热缩套管122、卡环126、O型密封圈132、O型密封圈1702、弹簧134、连接件138、插芯基座151及灌胶堵件124。在本申请实施例中，插芯180、连接件138、弹簧134、锁紧帽130依次套设于光缆110上。如图10所示，光纤连接头100的内部结构中，靠近插芯180的一端设有起密封作用的O型密封圈132，也 有起防松作用的弹簧134。另一端设有带胶热缩套管122实现与光缆110的固定和密封。
此外，尾套120可以先加工好再最后套上，也可以用整体注塑的方式最后浇注上，更增加连接头的抗拉强度和密封性，本申请实施例对此不作限定。
作为一个可选的实施例，如图10所示，所述光纤连接头100还包括：连接件138，套设于所述光缆110的外侧，所述连接件138远离所述插芯保护元件140的一端的内侧与所述光缆110的光缆的加强件粘连；其中，在所述连接件138远离所述插芯保护元件140的一端设有开口1381，便于胶水的注入，在所述连接件138的内侧还设有灌胶堵件124，防止胶水向所述插芯保护元件140的方向流动。
在本申请实施例中，光缆110的加强件，比如芳纶纱，可以通过胶和连接件138及灌胶堵件124粘在一起，以增加光纤连接头100的抗拉强度。具体而言，为了实现光缆和连接器可靠的、高机械强度的固定，在光缆110穿入连接件138后，在连接件138的尾部可通过注胶的方式将光缆110的加强件(例如，芳纶、钢丝、FRP等)、光缆110的其他部分(例如，套管、紧套层等)和连接件138的内壁粘连在一起。为了方便胶水的注入，在连接件138的粘连部分有一个开口1381，同时在连接件138的内部有一个防止胶水向连接器头端方向流动部件灌胶堵件124，具体如图11所示。
图12和图13是光纤连接头100的正面投影示意图，示出了光纤连接头100的内部卡扣解锁结构。图12是光纤连接头100的内部卡扣初始状态，图13是光纤连接头100的内部卡扣锁紧状态。
当插芯连接头100插入到插芯适配器200时，定位键1406将和适配器上的插槽2106配合，实行对准，插入后，通过转动手柄，锁紧帽130内表面的两个对称的锁紧点1304与插座201外表面两个对称的螺旋锁紧槽2105扣合，实现双重锁紧连接。当手柄转动的时候，光纤连接头100和光纤适配器200处于配合状态并不跟随手柄转动。
当需要从光纤适配器200上拔出光纤连接头100时，旋转锁紧帽130，使其从图12所示的状态转到图13所示的状态。锁紧帽130内表面的两个对称的锁紧点1304从插座201外表面的两个对称的螺旋锁紧槽2105中旋出松开，此时，光纤连接头100可以从光纤适配器200中拔出。
进一步地，在本申请实施例中，锁紧帽130可以旋转45度即可完成连接器的锁紧和解锁过程。为了限定锁紧帽130的转动角度，在锁紧帽130上设计了限位柱1504，并在锁紧帽130上设计了左右限位台1306。当连接器处于光纤连接头100和光纤适配器200连接锁紧的状态时，如图12所示，限位柱1504被左边的限位台1306限位，不能进一步顺时针转动；当连接器处于光纤连接头100和光纤适配器200松开的状态时，如图13所示，限位柱1504被右边的限位台1306限位，不能进一步逆时针转动。
本申请还提供了另一种光纤连接头100，该光纤连接头100包括：插芯180，套设于所述光缆110延伸出的光纤上；内套元件190，内部设有空腔，套设于所述插芯180的外侧；其中，所述内套元件190沿所述空腔的轴向设有第一端和第二端，所述内套元件190的套设于所述插芯180的外侧，且所述插芯180的第二端靠近所述内套元件190的第二端，所述内套元件190的第一端凸出于所述插芯180的第一端，以保护所述插芯180。
应理解，在本申请实施例中，如图6所示，插芯保护元件140和框套元件150是一体成型的，即作为内套元件190。所述内套元件190的第一端的端面和所述插芯180的第一 端的端面之间的距离小于或等于1mm。
可选地，该光纤连接头100还包括插芯基座151(如图9所示)，插芯180固定在该插芯基座151上，上述内套元件190可以与该插芯基座151固定。可选地，该内套元件190也可以直接与插芯180固定，本申请实施例对此不作限定。
还应理解，本实施例中的内套元件190也可以包括上述实施例中的对准键1406、至少两个突出键1405等。
还应理解，本实施例中的光纤连接头100也可以包括上述实施例中的尾套120、锁紧帽130、绳带160以及防尘帽170等等，与上面类似，此处不再赘述。本实施例中的光纤连接头100同样具有上述各个实施例中光纤连接头100的所有有益效果。还应理解，本实施例中的光纤连接头100可以包括光缆，也可以不包括光缆，具体可参照上述实施例。
图14示出了本申请实施例的光纤适配器200的示意图，包括：第一插座210，内部设有空腔，用于容纳与所述光纤适配器200适配的光纤连接头100的插芯保护元件140，所述第一插座210的空腔内部设有插槽2106，用于连接所述光纤连接头100的对准键1406，其中，所述对准键1406的截面与所述插槽2106的截面适配。
本申请实施例的光纤适配器200的空腔能够容纳与其适配的光纤连接头100的插芯保护元件140，有利于减小光纤连接装置以及相匹配的光纤适配器的外径。
作为一个可选的实施例，所述第一插座210设于所述光纤适配器200的第一端，用于匹配室外连接器的安装；所述光纤适配器200还包括：第二插座240，设于所述光纤适配器200的第二端，用于匹配室内连接器的安装。在本申请实施例中，光纤适配器200是左右不对称的结构。
进一步地，如图14所示，该光纤适配器200还可以包括O型密封圈250、锁紧螺母220以及防尘帽230。如图15所示，该光纤适配器200内部还具有陶瓷套管212。插座210、插座240和陶瓷套管212可以通过超声波焊接在一起或者一次注塑成型。
进一步地，在插座210的外表面设有2个对称的螺旋锁紧槽2105，连接时与锁紧帽130内表面的锁紧点扣合，实现锁紧连接。防尘帽230的内部结构与锁紧帽130类似，其内表面有2个对称的突出的锁紧点，锁紧螺母220使适配器可以安装在节点设备的外壁上。在光纤连接头100插入到光纤适配器200之前，防尘帽230是与插座210连接在一起的，从而起到防尘防水的作用。
作为一个可选的实施例，如图16所示，在所述第一插座210的外侧还设有抗扭元件2107，用于连接所述光纤连接头100的限位柱1504，其中，所述抗扭元件2107的截面与所述限位柱1504的截面适配。
具体地，如图16所示，将所述光纤连接头100插入所述光纤适配器200时，将光纤连接头100上的箭头对准适配器上的“O”，此时插芯保护元件140上的定位键1406对准光纤适配器200上的插槽2106插入，将所述插芯保护元件140插入空腔2011。所述光纤连接头100的锁紧点1304滑入所述光纤适配器的螺旋锁紧槽2105内，转动所述锁紧帽130，使得所述锁紧点1304滑到所述滑槽2015的末端，实现锁紧。插入后光纤连接头100上的限位健1504将和光纤适配器200上的抗扭部件2107配合，将光纤连接头200可能承受的、来自光缆扭力传递到光纤适配器200，以保证光纤连接装置的可靠连接。
虽然本申请实施例仅描述了光纤连接装置，但应理解，本申请的技术方案还可用于电 连接器，只需将光缆换成相应的电缆。
以上所述，仅为本申请的具体实施方式，但本申请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申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。

Claims (22)

  1. 一种光纤连接头(100)，其特征在于，包括：
    插芯(180)，套设于光缆(110)延伸出的光纤上；
    框套元件(150)，套设于所述插芯(180)的外侧，且所述插芯(180)的第一端凸出于所述框套元件(150)的第一端；
    插芯保护元件(140)，内部设有空腔，套设于所述框套元件(150)的第一端，
    其中，所述插芯保护元件(140)沿所述空腔的轴向设有第一端和第二端，所述插芯保护元件(140)的第二端与所述框套元件(150)的第一端连接，且所述插芯保护元件(140)的第一端凸出于所述框套元件(150)的第一端，以保护所述插芯(180)。
  2. 如权利要求1所述的光纤连接头(100)，其特征在于，所述插芯保护元件(140)和所述框套元件(150)卡合连接或一体成型。
  3. 如权利要求1或2所述的光纤连接头(100)，其特征在于，所述插芯保护元件(140)还包括：
    对准键(1406)，设于所述插芯保护元件(140)的外侧，且所述对准键(1406)用于对准与所述光纤连接头(100)适配的光纤适配器(200)的插槽(2106)，辅助所述光纤连接头(100)对准插入到所述光纤适配器(200)的空腔内。
  4. 如权利要求1至3中任一项所述的光纤连接头(100)，其特征在于，所述插芯保护元件(140)的第一端的端面凸出于所述插芯(180)的第一端的端面。
  5. 如权利要求4所述的光纤连接头(100)，其特征在于，所述插芯保护元件(140)的第一端的端面与所述插芯(180)的第一端的端面之间的距离小于或等于1mm。
  6. 如权利要求1至5中任一项所述的光纤连接头(100)，其特征在于，所述插芯保护元件(140)的第一端设有至少两个突出键(1405)，所述至少两个突出键(1405)凸出于所述插芯(180)的第一端。
  7. 如权利要求6所述的光纤连接头(100)，其特征在于，所述突出键(1405)的宽度大于所述插芯(180)的直径。
  8. 如权利要求6或7所述的光纤连接头(100)，其特征在于，所述至少两个突出键(1405)均匀分布于所述插芯保护元件(140)的第一端的端面。
  9. 如权利要求1至8中任一项所述的光纤连接头(100)，其特征在于，所述光纤连接头(100)还包括：
    连接件(138)，套设于所述光缆(110)的外侧，所述连接件(138)远离所述插芯保护元件(140)的一端的内侧与所述光缆(110)的光缆的加强件粘连；
    其中，在所述连接件(138)远离所述插芯保护元件(140)的一端设有开口(1381)，便于胶水的注入，在所述连接件(138)的内侧还设有灌胶堵件(124)，防止胶水向所述插芯保护元件(140)的方向流动。
  10. 如权利要求1至9中任一项所述的光纤连接头(100)，其特征在于，所述光纤连接头(100)还包括：
    锁紧帽(130)，套设于所述插芯保护元件(140)外侧，且所述插芯保护元件(140) 的第一端凸出于所述锁紧帽(130)的第一端。
  11. 一种光纤连接头(100)，其特征在于，包括：
    插芯(180)，套设于光缆(110)延伸出的光纤上；
    内套元件(190)，内部设有空腔，套设于所述插芯(180)的外侧；
    其中，所述内套元件(190)沿所述空腔的轴向设有第一端和第二端，所述内套元件(190)套设于所述插芯(180)的外侧，且所述插芯(180)的第二端靠近所述内套元件(190)的第二端，所述内套元件(190)的第一端凸出于所述插芯(180)的第一端，以保护所述插芯(180)。
  12. 如权利要求11所述的光纤连接头(100)，其特征在于，所述内套元件(190)的第一端的端面和所述插芯(180)的第一端的端面之间的距离小于或等于1mm。
  13. 如权利要求11或12所述的光纤连接头(100)，其特征在于，所述内套元件(190)还包括：
    对准键(1406)，设于所述内套元件(190)的外侧，且所述对准键(1406)用于对准与所述光纤连接头(100)适配的光纤适配器(200)的插槽(2106)，辅助所述光纤连接头(100)对准插入到所述光纤适配器(200)的空腔内。
  14. 如权利要求11至13中任一项所述的光纤连接头(100)，其特征在于，所述内套元件(190)的第一端设有至少两个突出键(1405)，所述至少两个突出键(180)凸出于所述插芯(180)的第一端。
  15. 如权利要求14所述的光纤连接头(100)，其特征在于，所述突出键(1405)的宽度大于所述插芯(180)的直径。
  16. 如权利要求14或15所述的光纤连接头(100)，其特征在于，所述至少两个突出键(1405)均匀分布于所述内套元件(190)的第一端的端面。
  17. 如权利要求1至16中任一项所述的光纤连接头(100)，其特征在于，所述光纤连接头(100)还包括所述光缆(110)。
  18. 一种光纤适配器(200)，其特征在于，包括：
    第一插座(210)，内部设有空腔，用于容纳与所述光纤适配器(200)适配的光纤连接头(100)的插芯保护元件(140)，所述第一插座(210)的空腔内部设有插槽(2106)，用于连接所述光纤连接头(100)的对准键(1406)，其中，所述对准键(1406)的截面与所述插槽(2106)的截面适配；
    所述第一插座(210)的外侧还设有抗扭元件(2107)，用于连接所述光纤连接头(100)的限位柱(1504)，其中，所述抗扭元件(2107)的截面与所述限位柱(1504)的截面适配。
  19. 如权利要求18所述的光纤适配器(200)，其特征在于，所述第一插座(210)设于所述光纤适配器(200)的第一端，用于匹配室外连接器的安装；
    所述光纤适配器(200)还包括：
    第二插座(240)，设于所述光纤适配器(200)的第二端，用于匹配室内连接器的安装。
  20. 一种光纤连接装置(10)，其特征在于，包括光纤适配器和如权利1至17中任一项所述的光纤连接头(100)。
  21. 如权利要求20所述的光纤连接装置(10)，其特征在于，所述光纤适配器为如权利要求18至20中任一项所述的光纤适配器(200)。
  22. 如权利要求21所述的光纤连接装置(10)，其特征在于，所述光纤连接头(100)的插芯保护元件(140)的第一端能够对准插入到所述光纤适配器(200)的第二端设有的空腔内。
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