CN106324766B - Optical fiber pre-connecting piece and terminal box with same - Google Patents
Optical fiber pre-connecting piece and terminal box with same Download PDFInfo
- Publication number
- CN106324766B CN106324766B CN201610885590.XA CN201610885590A CN106324766B CN 106324766 B CN106324766 B CN 106324766B CN 201610885590 A CN201610885590 A CN 201610885590A CN 106324766 B CN106324766 B CN 106324766B
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- optical fiber
- joint
- hole
- sealing
- terminal box
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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
- G02B6/3807—Dismountable connectors, i.e. comprising 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
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4439—Auxiliary devices
- G02B6/444—Systems or boxes with surplus lengths
- G02B6/4441—Boxes
- G02B6/4446—Cable boxes, e.g. splicing boxes with two or more multi fibre cables
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mechanical Coupling Of Light Guides (AREA)
- Light Guides In General And Applications Therefor (AREA)
Abstract
The invention discloses an optical fiber pre-connecting piece and a terminal box with the same. The optical fiber pre-connecting piece comprises a pre-connecting joint and a sealing sleeve, wherein the pre-connecting joint is provided with a connecting port for connecting the optical fiber joint, the connecting port is provided with a plug hole, an optical fiber through hole is formed in the center of the plug hole, the connecting port has an inclination angle with the horizontal direction, the sealing sleeve is installed on the outer side of the optical fiber joint, and the pre-connecting joint is connected with the sealing sleeve through a clamping groove or threads. This optic fibre is joint in advance of connecting piece installs on the terminal box, under the condition of not opening terminal box casing, can the direct mount connect optic fibre joint in advance or optic fibre quick connector, plug-and-play reduces the wiring time, convenient quick installation construction, and the on-the-spot wiring change is nimble rapid, and the seal cover protects joint in advance in addition, has dustproof, waterproof effect.
Description
Technical Field
The invention relates to the field of optical fiber connecting equipment, in particular to an optical fiber pre-connecting piece and a terminal box with the same.
Background
In recent years, with the rapid development of internet services, broadband access technology is continuously improved, the fiber to the home industry in China is in the period of rapid development, and matched equipment corresponding to the fiber to the home is also widely applied. The outdoor pre-connected optical fiber terminal box is mainly used in a 'last kilometer' access network of optical fibers to the home, is generally installed nearby residential districts and is installed through outdoor wall hanging or holding poles, and is used as indispensable telecommunication equipment for realizing the optical fibers to the home. At present, most of optical fiber terminal boxes are generally provided with leading-out rubber-covered wires or tail fibers which are mounted and fixed on adapters in the terminal boxes, and when a customer opens the terminal box, an upper shell of the terminal box is opened, and then the terminal box is communicated through a quick connector for inserting the rubber-covered wires or the tail fibers; therefore, the construction time is delayed, communication signals of opened customers are possibly influenced, and constructed optical fiber routes in the optical fiber routing box can be damaged.
In view of the above-mentioned drawbacks, the inventor of the present invention has conducted extensive research and practice to obtain an optical fiber pre-connector and a terminal closure having the same according to the present invention.
Disclosure of Invention
In order to solve the technical defects, the technical scheme adopted by the invention is to provide an optical fiber pre-connecting piece which comprises a pre-connecting joint and a sealing sleeve, wherein the pre-connecting joint is provided with a connecting port for connecting an optical fiber joint, the connecting port is provided with a plug hole, an optical fiber through hole is arranged in the center of the plug hole, the optical fiber through hole is horizontally arranged, the connecting port and the horizontal direction have an inclination angle, the sealing sleeve is arranged on the outer side of the optical fiber joint, and the pre-connecting joint is connected with the sealing sleeve through a clamping groove or a thread.
Preferably, the depth of the core inserting hole ranges from 6.55mm to 6.59mm, the inner diameter ranges from 1.25mm to 1.255mm, the diameter of the fiber through hole ranges from 0.1252mm to 0.1256mm, and the concentricity of the core inserting hole and the fiber through hole is not more than 0.5 μm.
Preferably, the inner wall of the connection port is provided with an elastic buckle for fixing the optical fiber connector.
Preferably, the end face of the core-insertion hole is coated with an anti-reflection coating.
Preferably, the optical fiber pre-connecting piece further comprises a connecting nut, a clamping groove for fixing a special wrench is formed in the outer surface of the connecting nut, and threads are formed in the inner surface of the connecting nut and used for connecting the pre-connecting joint.
Preferably, a positioning ring is arranged on the outer side of the pre-connection joint, and positioning marks are arranged on the outer surfaces of the sealing sleeve and the positioning ring.
Preferably, a sealing ring is installed on the outer side of the pre-connection joint.
Preferably, the tail part of the sealing sleeve is provided with a sealing cap, the sealing cap is in threaded connection with the sealing sleeve body, and an elastic sealing element is arranged in the sealing cap.
Preferably, the tilt angle is determined by the following formula:
wherein θ is the inclination angle, H is the depth of the plug hole, D is the outer diameter of the plug hole, and C is the concentricity of the plug hole and the optical fiber through hole.
A terminal box comprises a box body and a box cover, wherein one sides of the box body and the box cover are pivoted through a rotating shaft, the other sides of the box body and the box cover are provided with fixing buckles, locking mechanisms are arranged on the fixing buckles, and a fusion splice tray and an optical splitter fixing tray are arranged in the terminal box.
Compared with the prior art, the invention has the beneficial effects that:
1. the pre-connection joint of the optical fiber pre-connection piece is arranged on the terminal box, and the pre-connection optical fiber joint or the optical fiber quick connector can be directly arranged under the condition that a shell of the terminal box is not opened, so that the plug and play are realized, the wiring time is reduced, the quick installation and construction are convenient, and the change of field wiring is flexible and quick.
2. The core inserting hole is connected with the core inserting optical fiber of the optical fiber connector without a mechanical contact, the connection is more firm due to the elastic buckle in the core inserting hole, the plug-in butt joint mode is convenient to replace, the end face of the core inserting hole is coated with an anti-reflection coating, the optical signal attenuation is lower, and the service life is longer.
3. The pre-connecting piece comprises a sealing sleeve and a protective sealing cap, and has the functions of dust prevention and water prevention.
4. The connection port has a certain inclination angle, and is more firmly connected with the optical fiber connector, and the inclination angle is calculated according to the ferrule hole data formula, so that the concentricity and the stability of the optical fiber connection part are improved, and the return loss is improved.
5. The product of the pre-connecting piece is simple and standard in structure, all the parts are connected through buckles or threads, the pre-connecting piece is convenient to disassemble and assemble, certain indexes are provided, and once a fault occurs, the product can be quickly inquired.
6. The terminal box is provided with a plurality of optical fiber pre-connecting pieces, a small number of pre-connected optical fibers can be installed in the early stage according to actual construction requirements, and when a new customer is opened in the later stage, new pre-connected optical fiber installation is carried out, so that expansion and maintenance are facilitated.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below.
FIG. 1 is an exploded view of an optical fiber pre-connectorized piece according to the invention;
FIG. 2 is a cross-sectional view of the connectorized end of a pre-connectorized fiber optic splice of the present invention;
fig. 3 is a perspective view of the terminal enclosure of the present invention.
The figures in the drawings represent:
1. pre-connection joint 11, positioning ring 12, sealing ring 13, connection port 14, elastic buckle 15, plug hole 16, optical fiber through hole 2, sealing sleeve 21, positioning mark 22, sealing cap 23, elastic sealing element 3, connection nut 4, box cover 5, box body 6 and fixed buckle
Detailed Description
The above and further features and advantages of the present invention are described in more detail below with reference to the accompanying drawings.
< Pre-connection Joint >
Referring to fig. 1, the optical fiber pre-connector of the present invention includes a pre-connection joint 1, a sealing sleeve 2, and a connection nut 3. The outer surface of the connecting nut 3 is provided with a clamping groove, a special spanner can be used for fixing the clamping groove, the connecting nut 3 is rotated to be screwed, and the inner surface of the connecting nut is provided with threads for connecting the pre-connecting joint 1. The pre-connection joint 1 comprises a threaded connection end and an optical fiber connection end, and a positioning ring 11 is arranged between the two ends. Wherein the threaded end has an external thread which can be connected with an internal thread of the coupling nut 3. The outer surface of the optical fiber connecting end is provided with a clamping groove for being connected with the sealing sleeve 2, the optical fiber connecting end is provided with a connecting port 13, and a pre-connected optical fiber connector or an optical fiber quick connector can be directly installed and can be used in a plug-and-play mode. And a sealing ring 12 is also arranged outside the optical fiber connecting end and can be attached to the inner wall of the sealing sleeve 2 to play a role in sealing. The tail of the sealing sleeve 2 is provided with a sealing cap 22, the sealing cap 22 is in threaded connection with the main body of the sealing sleeve 1, and an elastic sealing element 23 is arranged in the sealing cap 22. The sealing sleeve 22 has dustproof and waterproof functions, and improves the safety and stability of the pre-connection joint 1. The main body of the sealing sleeve 2 and the positioning ring 11 are provided with positioning marks 21, and when the positions of the positioning marks 21 of the main body and the positioning ring correspond, the sealing sleeve 2 is installed in place.
Referring to fig. 2, it is a cross-sectional view of the optical fiber connection end of the pre-connection joint 1, the optical fiber connection end is provided with a connection port 13, and the inner wall is provided with an elastic buckle 14 for fixing the optical fiber joint. When the optical fiber connector is inserted into the connection port 13, the elastic buckle 14 is compressed, and the optical fiber connector is inserted into a fixed position and is elasticThe catch 14 returns to the groove action with the optical fiber connector to fix the optical fiber connector. The connection port 13 has a ferrule hole 15 for connecting a ferrule of an optical fiber splice. The end face of the core inserting hole 15 is coated with an anti-reflection coating, so that the optical signal attenuation of the optical fiber is lower, and the service life is longer. The center of the core inserting hole 15 is provided with an optical fiber through hole 16 for installing an optical fiber, the depth of the core inserting hole 15 is 6.55-6.59mm, the inner diameter range is 1.25-1.255mm, the diameter range of the optical fiber through hole 16 is 0.1252-0.1256mm, and the concentricity of the core inserting hole 15 and the optical fiber through hole 16 is not more than 0.5 μm. The plug core hole 15 is connected with the plug core optical fiber of the optical fiber connector without a mechanical contact, so that the connection is convenient, the design standard of the plug core hole 15 is high, the precision is high, and the optical signal attenuation can be reduced. In addition, the connection port 13 has an inclination angle with the horizontal direction, which is determined by the following formula:
where θ is the inclination angle, H is the depth of the plug hole 15, D is the outer diameter of the plug hole 15, and C is the concentricity of the plug hole 15 and the fiber through hole 16. The connection port 13 has a certain inclination angle, so that the connection with the optical fiber connector is firmer, the inclination angle is calculated according to a data formula of the plug hole 15, the concentricity and the stability of the optical fiber connection part are improved, and the return loss is improved.
When the pre-connecting piece is used, the connecting nut 3 is arranged on the terminal box, the pre-connecting joint 1 is in threaded connection with the connecting nut 3, and the optical fiber in the terminal box is inserted into the optical fiber through hole 16. The pre-connection joint 1 is separated from the sealing sleeve 2 and the sealing cap 22 is unscrewed. The optical cable is passed through the sealing cap 22 and the sealing sleeve 2, the pre-connection optical fiber connector or the optical fiber quick connector is inserted into the connection port 13, the ferrule enters the ferrule hole 15, and the elastic buckle 14 is confirmed to be fixed. And (3) connecting the sealing sleeve 2 with the clamping groove of the pre-connection joint 1, contacting the sealing sleeve 2 with the positioning ring 11, and confirming that the connection is in place due to the corresponding positions of the positioning marks 21 on the surfaces of the sealing sleeve and the positioning ring. At the moment, the sealing ring 12 is in contact with the inner wall of the sealing sleeve 2 to play a role in sealing. The sealing cap 22 is screwed down, the elastic sealing element 3 and the sealing ring 12 play a sealing role, the pre-connecting piece has waterproof and dustproof functions, and the optical fiber connection stability is improved. The optical fiber pre-connecting piece product is simple in structure and standard, all parts are connected through buckles or threads, the optical fiber pre-connecting piece is convenient to disassemble and assemble, fixed indexes are achieved, and once a fault occurs, the optical fiber pre-connecting piece can be rapidly inquired.
< terminal closure >
Referring to fig. 3, the terminal box of the present invention includes a box body 5 and a box cover 4, wherein the left sides of the box body 5 and the box cover 4 are pivoted through a rotation shaft, the right side is provided with a fixing buckle 6, the fixing buckle 6 is provided with a locking mechanism, and the locking mechanism is a fixing screw. Sixteen pre-connecting pieces are arranged on the lower side of the box body 5, so that only a small number of pre-connected optical fibers can be installed in the early stage according to actual construction requirements, and new pre-connected optical fibers are installed when new customers are opened in the later stage, so that the expansion and maintenance are facilitated. And a fusion splice tray and an optical splitter fixing tray are arranged in the terminal box and are respectively used for installing the fusion splice tray and the optical splitter. During construction, the terminal box is fixed at the mounting position, and the optical fiber is accessed into the terminal box. And then introducing the optical fiber into the fusion splice tray, waiting for subsequent fusion splicing, fixing the optical splitter on the optical splitter fixing tray, introducing the input end of the optical splitter into the fusion splice tray, fusing the optical fiber with the fusion splice tray, and protecting and fixing the optical fiber through the heat fusion pipe. And finally, inserting the optical fiber at the output end of the optical splitter into the optical fiber through hole 16 of the pre-connection joint 1, and completing the optical fiber access, so that the pre-connection piece can be directly installed with the pre-connection optical fiber joint or the optical fiber quick connector, the plug and play is realized, the wiring time is reduced, the quick installation and construction are convenient, and the field wiring change is flexible and quick.
< modification of embodiment >
The difference between the pre-connectorized joint and the sealing sleeve as described in the above embodiments is that the optical fiber connection end of the pre-connectorized joint is provided with an external thread and the sealing sleeve is provided with an internal thread, both of which are threadedly connected.
The connection port described in the above embodiment is different from the present embodiment in that the depth of the plug hole is 6.55mm, the inner diameter is 1.25mm, the diameter of the fiber through hole is 0.1252mm, the concentricity of the plug hole and the fiber through hole is 0.1 μm, and the angle of inclination of the connection port to the horizontal direction is 8 °.
The connection port described in the above embodiment is different from the present embodiment in that the depth of the plug hole is 6.59mm, the inner diameter is 1.255mm, the diameter of the fiber through hole is 0.1256mm, the concentricity of the plug hole and the fiber through hole is 0.5 μm, and the angle of inclination of the connection port to the horizontal direction is 23 °.
The connection port described in the above embodiment is different from the present embodiment in that the depth of the plug hole is 6.57mm, the inner diameter is 1.253mm, the diameter of the fiber through hole is 0.1254mm, the concentricity of the plug hole and the fiber through hole is 0.3 μm, and the angle of inclination of the connection port to the horizontal direction is 16 °.
The terminal box according to the above embodiment is different from the terminal box according to the embodiment in that the right sides of the box body 5 and the box cover are pivotally connected through a rotating shaft, the left side of the box body is provided with a fixing buckle, and a locking mechanism on the fixing buckle is a bolt.
The locking mechanism described in the above embodiments differs from the present embodiment in that the locking mechanism on the fixed catch is a snap lock.
The terminal enclosure according to the above-described embodiment is different from the terminal enclosure according to the present embodiment in that sixteen preconnectors are provided on the upper side of the enclosure.
The terminal enclosure according to the above embodiment is different from the above embodiment in that eight pre-connectors are provided on the upper and lower sides of the enclosure, respectively.
The foregoing is merely a preferred embodiment of the invention, which is intended to be illustrative and not limiting. It will be understood by those skilled in the art that various changes, modifications and equivalents may be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (6)
1. An optical fiber pre-connecting piece is characterized by comprising a pre-connecting joint and a sealing sleeve, wherein the pre-connecting joint is provided with a connecting port for connecting an optical fiber joint, the inner wall of the connecting port is provided with an elastic buckle for fixing the optical fiber joint, the connecting port is provided with a plug hole, the center of the plug hole is provided with an optical fiber through hole, the optical fiber through hole is horizontally arranged, the end face of the plug hole is coated with an anti-reflection coating, the depth range of the plug hole is 6.55-6.59mm, the inner diameter range of the plug hole is 1.25-1.255mm, the diameter range of the optical fiber through hole is 0.1252-0.1256mm, the concentricity of the plug hole and the optical fiber through hole is not more than 0.5 μm, the connecting port and the horizontal direction have an inclination angle, and the inclination angle is determined by the following formula:
wherein θ is the inclination angle, H is the depth of the core-insert hole, D is the outer diameter of the core-insert hole, and C is the concentricity of the core-insert hole and the optical fiber through hole;
the sealing sleeve is installed outside the optical fiber connector, and the pre-connection connector is connected with the sealing sleeve through a clamping groove or threads.
2. The optical fiber pre-connector of claim 1, further comprising a coupling nut, wherein an outer surface of the coupling nut is provided with a slot for a special wrench to fix, and an inner surface of the coupling nut is provided with threads for coupling a pre-connection joint.
3. The optical fiber preconnectorized of claim 2, wherein a positioning ring is disposed outside said preconnectorized joint, and wherein said sealing boot and an outer surface of said positioning ring are provided with positioning marks.
4. The optical fiber preconnectorized of claim 3, wherein a sealing ring is mounted to an outside of said preconnectorized joint.
5. The optical fiber pre-connecting piece according to claim 4, wherein a sealing cap is provided at the tail of the sealing boot, the sealing cap is in threaded connection with the boot body of the sealing boot, and an elastic sealing member is installed in the sealing cap.
6. A terminal box comprises a box body and a box cover, wherein one side of the box body and one side of the box cover are pivoted through a rotating shaft, the other side of the box body and the other side of the box cover are provided with fixing buckles, locking mechanisms are arranged on the fixing buckles, and a fusion splice tray and an optical splitter fixing tray are arranged in the terminal box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610885590.XA CN106324766B (en) | 2016-10-11 | 2016-10-11 | Optical fiber pre-connecting piece and terminal box with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610885590.XA CN106324766B (en) | 2016-10-11 | 2016-10-11 | Optical fiber pre-connecting piece and terminal box with same |
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| Publication Number | Publication Date |
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| CN106324766A CN106324766A (en) | 2017-01-11 |
| CN106324766B true CN106324766B (en) | 2020-09-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610885590.XA Active CN106324766B (en) | 2016-10-11 | 2016-10-11 | Optical fiber pre-connecting piece and terminal box with same |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111107446A (en) * | 2019-12-18 | 2020-05-05 | 烽火海洋网络设备有限公司 | Outdoor repeater's sealed casing and outdoor repeater |
| CN112290340B (en) * | 2020-10-15 | 2022-06-07 | 贵州电网有限责任公司 | Last cable preassemble screw thread external member of being qualified for next round of competitions of power equipment |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105134775A (en) * | 2015-10-12 | 2015-12-09 | 山东凯美瑞轴承科技有限公司 | Hybrid bearing with center regulating function |
| CN205562918U (en) * | 2016-04-11 | 2016-09-07 | 宁波展通电信设备股份有限公司 | Outdoor prebinding optical fiber termination box |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7753596B2 (en) * | 2005-11-22 | 2010-07-13 | Corning Cable Systems Llc | Fiber optic closure methods and apparatus |
| US7512304B2 (en) * | 2007-03-23 | 2009-03-31 | Adc Telecommunications, Inc. | Drop terminal with anchor block for retaining a stub cable |
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- 2016-10-11 CN CN201610885590.XA patent/CN106324766B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105134775A (en) * | 2015-10-12 | 2015-12-09 | 山东凯美瑞轴承科技有限公司 | Hybrid bearing with center regulating function |
| CN205562918U (en) * | 2016-04-11 | 2016-09-07 | 宁波展通电信设备股份有限公司 | Outdoor prebinding optical fiber termination box |
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| CN106324766A (en) | 2017-01-11 |
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Address after: 315456 Fumin Industrial Zone, Mou Shan town, Ningbo, Zhejiang, Yuyao Applicant after: NINGBO ZHANTONG TELECOM EQUIPMENT CO., LTD. Address before: 315456 Fumin Industrial Zone, Mou Shan town, Ningbo, Zhejiang, Yuyao Applicant before: Ningbo Zhantong Telecom Equipment Industrial Co., Ltd. |
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