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
• • 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
  • G02B6/38875—Protection from bending or twisting
• • 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
  • G02B6/3889—Anchoring optical cables to connector housings, e.g. strain relief features using encapsulation for protection, e.g. adhesive, molding or casting resin

Definitions

• the utility model relates to an optical fiber connecting device, in particular to an improved optical fiber access plug.
• Optical fiber communication has become one of the main pillars of modern communication, playing a pivotal role in modern telecommunication networks.
• the development of network technology has made optical fiber widely used as a transmission medium for high-speed and broadband data communication.
• a fiber optic connector is a detachable (active) connection between an optical fiber and an optical fiber that precisely interfaces the two end faces of the optical fiber such that the optical energy output from the transmitting optical fiber is maximally coupled to the receiving optical fiber. And minimize the impact on the system due to its involvement in the optical link.
• the commonly used fiber optic connectors can be divided into various forms according to the structure of the connector: FC, SC, ST, LC, D4, DIN, MU, MT, and the like.
• the FC type fiber optic connector was first developed by NTT Japan.
• the external reinforcement method is a metal sleeve and the fastening method is a turnbuckle.
• the SC type fiber optic connector has a rectangular outer casing, and the pin and the coupling sleeve are of the same structural size as the FC type, and the fastening method is a plug-and-pin type.
• the difference between the ST connector and the SC type fiber connector is that the core of the ST connector is exposed, and the core of the SC connector is inside the connector.
• the LC connector was developed by the famous Bell Institute and is made with a convenient modular jack (RJ) latching mechanism.
• the size of the pins and sleeves used is half that of ordinary SC, FC, etc., which is 1.25 ⁇ , and the corresponding interface end face size is 4. 5 ⁇ X 4. 5 ⁇ , which can improve the fiber wiring.
• the MU (Miniature Unit Coupling) connector is the world's smallest single-core fiber optic connector developed by NTT based on the most widely used SC-type connector. 5 ⁇ X 4. 4 ⁇
• the optical fiber network is rapidly developing in the direction of larger bandwidth and larger capacity, and the number of optical fiber handovers in the optical access network is increasing.
• the demand for the transfer capacity of the device is also increasing.
• the installation density of the fiber connector is required to be higher and higher, and the corresponding volume is getting smaller and smaller.
• the lateral dimension of the end face of the fiber connector interface is required to be as small as possible to achieve
• the installation density of the optical fiber connector is increased, but the structure and assembly process of the above existing optical fiber connector are not suitable for such a demand.
• the outer casing of the existing optical fiber connector is generally divided into two parts.
• the SC is divided into inner and outer frame sleeves, and the LC is divided into front and rear casings.
• the process of manufacturing the two-part structure is complicated, and the process required for installation is required. It is also complicated, and the two-part fiber optic connector housings are usually fixedly connected by snaps. Multiple plugging and unplugging may cause the connection strength to be lowered, which is a weak connection between the two, affecting the product. In normal use, only new products can be replaced, which increases waste of manufacturing and use costs.
• the purpose of the utility model is to provide an improved optical fiber access plug, wherein the outer casing of the optical fiber access plug adopts an integral design, which is different from the existing optical fiber connector structure, and can be greatly reduced under the premise of satisfying the structural strength.
• the lateral dimension of the end face of the fiber optic connector increases the mounting density of the fiber optic connector, and at the same time makes the structure of the fiber access plug more compact, quicker and more convenient to install and manufacture.
• An improved fiber optic access plug comprising a housing, a ferrule assembly connected to the optical fiber, and a tail sheath
• the ferrule assembly includes a ceramic ferrule and a ceramic ferrule tailstock fixed to the ceramic ferrule, wherein the housing is an integrated cavity structure, a front end of the housing is provided with a through hole, and a tail insertion tail
• the ceramic ferrule passes through the through hole, the front portion of the tail pipe is connected to the inner wall of the casing through the anti-back barb on the outer wall thereof, and the rear portion of the tail pipe is connected with the tail sheath, the inner cavity of the tail pipe
• the utility model is composed of two through holes, and a tapered hole having a guiding end transitions to a circular through hole at the rear end; a housing inner cavity between the ceramic ferrule tailstock and the tail pipe is provided with a spring to provide a fitting force when the plug is docked.
• the housing is provided with a resilient cantilever for locking with the insertion portion, the fixed end of the elastic cantilever is facing the tail of the connector, and the free end is facing the insertion end and is provided with a retaining projection.
• the inner wall of the through hole is provided with a plurality of symmetrically arranged positioning protrusions; the ceramic ferrule tailstock is provided with a positioning groove matched with the positioning protrusion.
• the anti-back barbs on the tail pipe are arranged in an annular shape and are flattened on both sides.
• the tail sheath is fixedly connected to the plug through a tail pipe
• the tail sheath is an elastic rubber or plastic material
• a fastening sleeve is sequentially arranged from the inside to the outside of the tail sheath and the tail pipe.
• heat shrink tubing is used to fix the fiber to the tail pipe.
• the lateral width of the housing is 2. 5 mm to 4. 5 mm.
• the tail pipe is processed from copper or aluminum.
• the utility model has the beneficial effects that the utility model provides an improved light access plug and an assembly method thereof, and the outer casing adopts an integrated cavity structure, which is integrally molded by a mold, which is generally composed of two parts.
• the outer casing is simpler in structure, more convenient and quicker in the production and assembly process, and can avoid the decrease of the connection strength between the components caused by the two-part structure during the process of plugging and unplugging;
• the new type of spring is disposed in the cavity of the outer casing, and the spring is guided by the cavity of the connector housing, and the two ends are respectively limited by the ceramic ferrule tailstock and the tail pipe, and no additional structure is required for fixing, and can be provided Sufficient fit; at the same time, the inner cavity of the tail pipe is made
• the tapered hole with guiding function can play a guiding role when the optical fiber is inserted into the access plug, which can effectively prevent the optical fiber from being bent when the plug is inserted, thereby improving the installation efficiency of the optical fiber installation.
• FIG. 1 is a schematic view showing an assembly structure of an optical fiber access plug provided by an embodiment
• FIG. 2 is a schematic external structural view of an optical fiber access plug provided by an embodiment
• Figure 3 is an exploded view of the Figure 2;
• FIG. 4 is a schematic structural view of an optical fiber access plug housing according to an embodiment
• Figure 5 is a schematic structural view of the ferrule assembly of the embodiment
• Figure 6 is a schematic structural view of a tail pipe according to an embodiment
• Figure 7 is a schematic view showing the internal structure of the tail pipe according to the embodiment.
• 1 housing; 2: ferrule assembly; 3: tail sheath; 4: tail tube; 5: spring; 6: fastening sleeve; 7: heat shrink tube;
• a specific embodiment of the improved light access plug of the present invention which comprises a housing 1, a ferrule assembly 2 connected to the optical fiber, and a tail sheath 3, wherein
• the ferrule assembly 2 comprises a ceramic ferrule 21 and a ceramic ferrule tailstock 22 fixed to the ceramic ferrule;
• the housing 1 is an integral cavity structure, the front end of the housing 1 is provided with a through hole 11, the tail is inserted into the tail pipe 4, ceramic Ferrule 21 from through hole 11
• the front part of the tail pipe 4 is connected to the inner wall of the casing 1 through the anti-back barbs 41 on the outer wall thereof, the tail pipe 4 is connected to the tail casing 3 at the rear, and the inner cavity of the tail pipe 4 is a two-section through hole.
• the inner cavity of the tail pipe 4 is transformed from the tapered hole 42 having a guiding end to the circular through hole 43 at the rear end, and the front end of the inner cavity of the tail pipe 4 is formed as a tapered hole 42 having a guiding action.
• the optical fiber When the optical fiber is inserted into the access plug, it plays a guiding role, which can effectively prevent the optical fiber from being bent when the plug is inserted, thereby improving the installation efficiency of the optical fiber installation, and guiding the optical fiber during fiber de-fibering, thereby effectively preventing the fiber from being broken.
• the housing cavity between the ceramic ferrule tailstock 22 and the tail pipe 4 is provided with a spring 5 to provide a fitting force when the plug is docked.
• the housing 1 is provided with an elastic cantilever 12 for locking with the insertion portion.
• the fixed end 121 of the elastic cantilever 12 faces the tail of the connector, and the free end 122 faces the insertion end and is provided with the retracting projection 1221;
• the end of the elastic cantilever 12 has a beveled retracting projection 1221.
• the anti-retracting projection 1221 can be inserted from the corresponding adapter under the elastic force of the elastic cantilever 12 when the optical fiber connector is inserted into a design position such as an adapter module.
• the groove is ejected to form a lock; when exiting, the lower arm is pressed accordingly, and the retracting projection 1221 is withdrawn from the groove on the adapter, and the bevel structure is automatically driven from the adapter slot by the elastic force of the elastic cantilever 12 itself.
• the fixed end 121 of the elastic cantilever 12 is located at the rear end of the connector housing 1 and has a free end 122 facing the connector insertion end. During the exit process, the pulling of the adjacent fiber is not formed, thereby effectively avoiding misoperation and adjacent fibers. At the same time, it can be easily inserted from the free end by means of a lasso and the like, thereby pulling out the connector and effectively solving the problem.
• the disadvantages of high-density connectors are inconvenient to pull out.
• the inner wall of the through hole 11 is provided with a plurality of symmetrically arranged positioning protrusions 111.
• the ceramic ferrule tailstock 22 is provided with a positioning groove 221 which cooperates with the positioning protrusion, and the positioning protrusion 111 and the positioning groove 221 cooperate with each other. To limit the rotation of the ceramic ferrule assembly 2, and to guide the axial movement of the ceramic ferrule assembly 2.
• the housing 1 of the light access plug adopts an integral cavity structure, and the outer casing 1 is integrally formed by a mold.
• the structure is simple, and it is convenient and quick in the process of production and assembly, and the connection strength between the two parts can be avoided, and the connection strength between the components can be reduced. The resulting connector cannot be used.
• the tail pipe 4 and the cavity of the casing 1 are straight through holes, on the one hand, as a fiber channel, and on the other hand, have a large inner diameter, which can serve as a curved accommodation space when the fiber is retracted when the plug is docked.
• the tail pipe 4 is made of copper or aluminum.
• the copper or aluminum material can increase the structural strength of the tail pipe 4, and at the same time facilitate the processing of the tail pipe;
• the tail pipe 4 has a check barb 41, which is The unwinding hooks 41 are distributed in an annular shape and are flattened on both sides thereof.
• the outer casing 1 is provided with an annular groove 13 which cooperates with the retaining barbs 41, and passes through the anti-back barbs 41 and the annular grooves.
• the interference fit of 13 can make the tail pipe 4 and the outer casing 1 fixedly connected; the both sides of the anti-back barb 41 can be flattened, and the lateral width of the outer casing 1 can be further reduced while preventing the rotation of the tail pipe 4,
• the lateral width of the outer casing 1 is 2. 5 mm to 4. 5 mm.
• the access plug of the present invention has a smaller width, which can greatly improve the installation density of the optical fiber access plug.
• the spring 5 disposed between the ceramic ferrule tailstock 22 and the tail pipe 4, the spring 5 being compressed between the ceramic ferrule tailstock 22 and the tail pipe 4, one end of which is sleeved on the ceramic ferrule 22, and the other end
• the sleeve is connected to the tail pipe 4 and is compressed and fixed by the tail pipe 4.
• the elastic butt joint can make the ceramic ferrule 21 and the adapter fit more closely; and the cavity of the outer casing 1 forms a circumferential constraint on the spring 5, and the ceramic ferrule tailstock 22 and the tail pipe 4 provide a limit, which does not need In addition, other structures are added to provide the limit and fixing of the spring 5.
• the optical fiber access plug further has a tail sheath 3, and the tail sheath 3 is fixedly connected to the plug through the tail pipe 4, the tail sheath 3 is an elastic rubber or material material, and is a thick and thin cone a structure between the tail sheath 3 and the tail pipe 4, which is provided with a fastening sleeve 6 and a heat shrinkable tube 7 from the inside to the outside for the light to be used
• the fiber is fixed in the tail pipe 4, wherein the heat shrinkable tube 7 is disposed in the tail sheath 3.

Landscapes

• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Optics & Photonics (AREA)
• Mechanical Coupling Of Light Guides (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=47737278

Family Applications (1)

Country Status (2)

Cited By (5)

Families Citing this family (2)

Citations (6)

• 2012
  • 2012-09-06 CN CN201220452333.4U patent/CN202758106U/zh not_active Expired - Fee Related
  • 2012-10-23 WO PCT/CN2012/083387 patent/WO2014036780A1/fr not_active Ceased

Patent Citations (6)

Also Published As

Similar Documents

Legal Events