CN110208911B - Optical fiber plug and optical fiber connector - Google Patents
Optical fiber plug and optical fiber connector Download PDFInfo
- Publication number
- CN110208911B CN110208911B CN201811451843.8A CN201811451843A CN110208911B CN 110208911 B CN110208911 B CN 110208911B CN 201811451843 A CN201811451843 A CN 201811451843A CN 110208911 B CN110208911 B CN 110208911B
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- CN
- China
- Prior art keywords
- optical fiber
- rotation stopping
- contact pin
- adapter
- plug
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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
- G02B6/3873—Connectors using guide surfaces for aligning ferrule ends, e.g. tubes, sleeves, V-grooves, rods, pins, balls
Abstract
The invention relates to an optical fiber plug and an optical fiber connector. The optical fiber plug comprises an inner sheath and a contact pin, the contact pin is provided with a contact pin inner hole, the optical fiber plug further comprises a rotation stopping piece which is used for being fixed on the inner sheath and marking the inclined direction of an optical fiber end face relative to the axis of the contact pin inner hole, the rotation stopping piece is provided with a rotation stopping matching face which is used for being matched with an optical fiber adapter in an axial guiding mode and being matched with a circumferential rotation stopping mode and guiding the optical fiber plug and the optical fiber adapter to be plugged, and at least two rotation stopping piece fixing positions. The optical fiber is installed to the inner hole of the contact pin and then the coaxiality of the optical fiber and the contact pin is detected, if the optical fiber deflects, the rotation stopping piece is fixedly installed at the position of the rotation stopping piece fixing position which is closest to or farthest from the deflection direction of the optical fiber, at the moment, the rotation stopping piece can mark the deflection direction of the end face of the optical fiber relative to the axis of the inner hole of the contact pin, and meanwhile, the guide rotation stopping effect is achieved.
Description
Technical Field
The invention relates to an optical fiber plug and an optical fiber connector.
Background
In the field of optical communications, it is often necessary to implement signal transmission of two optical fiber plugs through optical fiber adapters. The application publication number is CN 106873085A's Chinese patent application discloses an optical fiber adapter, this optical fiber adapter includes adapter housing, be provided with the sleeve pipe that extends along left right direction in the adapter housing, adapter housing and sheathed tube left end are for being used for the left grafting end of inserting with first optical fiber plug, adapter housing and sheathed tube right-hand member are for being used for inserting with second optical fiber plug right side grafting end, adapter housing's left end is equipped with the left direction keyway that is used for supplying the direction of the guide key piece on the first optical fiber plug to pack into, adapter housing's right-hand member is equipped with the right direction keyway that is used for supplying the direction of the guide key piece on the second optical fiber plug to pack into.
Theoretically, the optical fibers of the first optical fiber plug and the second optical fiber plug are coaxial after being plugged into the optical fiber adapter, and the situation that the butt joint of the end faces of the optical fibers is not accurate often occurs after the optical fibers are actually plugged. This is because fiber optic plug is in the manufacturing assembly process, optic fibre and the contact pin hole on the fiber optic plug are clearance fit, fix optic fibre in the contact pin hole back optic fibre can avoid can be partial to one side of contact pin hole and with the contact pin hole disalignment, the phenomenon that the optic fibre dress is askew appears promptly, like this, when two fiber optic plugs and fiber optic adapter are inserted to each other, as long as the askew condition of optic fibre dress appears in one of them fiber optic plug, the axiality of the optic fibre of two fiber optic plugs will unable accurate assurance, the accurate butt joint of optic fibre terminal surface is unable assurance promptly, thereby lead to fiber connector's insertion loss great.
Disclosure of Invention
The invention aims to provide an optical fiber plug to solve the problem that the insertion loss is large because the accurate butt joint of the end faces of optical fibers cannot be ensured when the optical fiber plug and an optical fiber adapter are oppositely inserted in the prior art; meanwhile, the invention also provides an optical fiber connector, which solves the problem of larger insertion loss caused by incapability of ensuring accurate butt joint of optical fiber end faces when an optical fiber plug and an optical fiber adapter of the conventional optical fiber connector are inserted oppositely.
In order to achieve the purpose, the technical scheme of the optical fiber plug is as follows:
the optical fiber plug comprises an inner sheath and a contact pin installed in the inner sheath, the contact pin is provided with a contact pin inner hole used for installing optical fibers, the optical fiber plug further comprises a rotation stopping piece used for being fixed on the inner sheath and identifying the inclined direction of an optical fiber end face relative to the axis of the contact pin inner hole, the rotation stopping piece is provided with a rotation stopping matching face used for being matched with an optical fiber adapter in an axial guiding mode and being matched with a circumferential rotation stopping mode and guiding the optical fiber plug and the optical fiber adapter to be plugged, and at least two rotation stopping piece fixing positions used for fixing the rotation stopping piece after the optical fibers are installed in the contact.
Install optic fibre to the contact pin hole in the back and detect the axiality of the two through the detector, if optic fibre takes place the skew in the contact pin hole, just will only change a fixed mounting and be in the piece fixed position department that only changes that is nearest or farthest from optic fibre skew direction, only change a this moment and can enough sign the skew direction of optic fibre terminal surface for contact pin hole axis, still play the direction and only change the effect simultaneously, when inserting two optic fibre plugs and optic fibre adapter, make two optic fibre partial same one side, thereby make the optic fibre terminal surface can realize more accurate butt joint, reduce and insert the loss.
Fixing grooves for fixing the rotation stopping pieces are arranged at the positions of the fixing positions of the rotation stopping pieces, and the fixing grooves are arranged at intervals. The fixed position is arranged at a fixed point, so that the fixed position and the installation of the rotation stopping piece are facilitated.
The rotation stopping piece is a rotation stopping key matched with the fixing groove. The rotation stopping piece is simple in structure and convenient to realize.
The rotation stopping piece is in interference fit with the fixing groove. The interference fit structure is simple, and the processing and the installation are convenient.
The outer peripheral surface of the inner sheath is processed with a plane, and the fixing groove is formed in the plane. The plane is processed firstly, and then the fixing groove is processed, so that the processing of the fixing groove can be facilitated.
The technical scheme of the optical fiber connector is as follows:
fiber connector includes fiber adapter and with two fiber plug of fiber adapter adaptation, fiber adapter includes the adapter casing, adapter casing both ends are respectively with two fiber plug grafting complex grafting end, the grafting end of adapter casing is equipped with and is used for the guide to correspond the male guide structure of fiber plug, fiber plug includes the inner sheath and installs the contact pin in the inner sheath, the contact pin has the contact pin hole that is used for installing optic fibre, fiber plug still including being used for fixing on the inner sheath and sign fiber end face for the rotation stopping spare of contact pin hole axis skew direction, rotation stopping spare has and is used for stopping the cooperation and guide fiber plug and fiber adapter to the rotation stopping fitting surface of inserting with fiber adapter axial direction cooperation and circumference, be equipped with two at least rotation stopping spare fixed positions that are used for fixing rotation stopping spare behind fiber installation to the contact pin hole on the inner sheath.
Install optic fibre to the contact pin hole in the back and detect the axiality of the two through the detector, if optic fibre takes place the skew in the contact pin hole, just will only change a fixed mounting and be in the piece fixed position department that only changes that is nearest or farthest from optic fibre skew direction, only change a this moment and can enough sign the skew direction of optic fibre terminal surface for contact pin hole axis, still play the direction and only change the effect simultaneously, when inserting two optic fibre plugs and optic fibre adapter, make two optic fibre partial same one side, thereby make the optic fibre terminal surface can realize more accurate butt joint, reduce and insert the loss.
Fixing grooves for fixing the rotation stopping pieces are arranged at the positions of the fixing positions of the rotation stopping pieces, and the fixing grooves are arranged at intervals. The fixed position is arranged at a fixed point, so that the fixed position and the installation of the rotation stopping piece are facilitated.
The rotation stopping piece is a rotation stopping key matched with the fixing groove. The rotation stopping piece is simple in structure and convenient to realize.
The rotation stopping piece is in interference fit with the fixing groove. The interference fit structure is simple, and the processing and the installation are convenient.
The outer peripheral surface of the inner sheath is processed with a plane, and the fixing groove is formed in the plane. The plane is processed firstly, and then the fixing groove is processed, so that the processing of the fixing groove can be facilitated.
Drawings
FIG. 1 is a schematic structural diagram of an optical fiber plug according to an embodiment of the optical fiber connector of the present invention;
FIG. 2 is a half-sectional view of FIG. 1;
FIG. 3 is a schematic structural view of a pin assembly;
in the figure: 1-an inner sheath; 2-inserting a pin; 3-rotation stopping element; 4, fixing the groove; 5-a pin assembly; 6-outer shell.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings.
The optical fiber connector comprises an optical fiber adapter and two optical fiber plugs matched with the optical fiber adapter, wherein the optical fiber adapter comprises an adapter shell, two ends of the adapter shell are insertion ends respectively matched with the two optical fiber plugs in an insertion manner, the insertion ends of the adapter shell are provided with guide structures used for guiding the corresponding optical fiber plugs to be inserted, a sleeve pipe is arranged in the adapter shell, two ends of the sleeve pipe are respectively matched with and oppositely inserted into contact pins of the two optical fiber plugs, and the contact pins of the two optical fiber plugs are butted in the sleeve pipe to realize transmission of optical signals. The specific structure of the fiber optic adapter is the same as that of the fiber optic adapter of the prior art and will not be described in detail herein.
The structure of the optical fiber plug is as shown in fig. 1 to 3, and comprises an outer shell 6, a pin assembly 5 is installed at one end of the outer shell 6, as shown in fig. 3, the pin assembly 5 comprises an inner sheath 1 and a pin 2 installed in the inner sheath 1, the pin 2 is provided with a pin inner hole for installing an optical fiber, the optical fiber plug further comprises a rotation stopping piece 3, and the rotation stopping piece 3 is fixed on the inner sheath 1 and marks the deflection direction of an optical fiber end face relative to the axis of the pin inner hole. The rotation stopping piece 3 is provided with a rotation stopping matching surface which is matched with a guide structure on the optical fiber adapter in an axial guiding way and is matched with the rotation stopping in a circumferential direction. Be equipped with four fixed slots 4 that are used for fixing the piece 3 that splines after optic fibre is installed to the contact pin hole on inner sheath 1, four fixed slots 4 are the equipartition in inner sheath 1's circumference. In this embodiment, the rotation stopping member 3 is a rotation stopping key adapted to the fixing groove 4, and the rotation stopping key is in interference fit with the fixing groove 4, and the rotation stopping fitting surface is a side surface of the rotation stopping key. The inner sheath 1 is provided with a flange plate, four planes are processed on the peripheral surface of the flange plate, and the fixing grooves 4 are formed in the four planes. In this embodiment, the optical fiber plug is an ST plug, and in other embodiments, the optical fiber plug may also be an SC plug or an FC plug.
When the optical fiber connector is assembled, firstly, an optical fiber is installed in an inner hole of a contact pin, then the coaxiality of the optical fiber and the inner hole of the contact pin is detected through a special detector, if the optical fiber deflects in the inner hole of the contact pin, a rotation stopping key is fixedly installed at a fixed position of a rotation stopping piece which is closest to or farthest from the deflection direction of the optical fiber, which is equivalent to that a mark is given, at the moment, the rotation stopping key can play a role in guiding and stopping rotation, and simultaneously the deflection direction of the end face of the optical fiber relative to the axis of the inner hole of the contact pin is marked, two assembled optical fiber plugs are respectively inserted into an optical fiber adapter, the rotation stopping keys on the two optical fiber plugs respectively correspond to guide structures at two ends of the optical fiber adapter, the guide structures are specifically guide grooves, only one guide groove is arranged at each end, the two guide grooves are positioned on the same straight, the optical fibers in the contact pins on the two sides are deviated to the same side, but can be easily butted, so that the insertion loss is reduced.
In the above embodiment, the fixing position of each rotation stopping member is provided with a fixing groove, and the rotation stopping key is fixed on the inner sheath by interference fit of the rotation stopping key and the fixing groove. In other embodiments, the rotation stop member may be a staple. Or a threaded hole is formed in a fixed position of the rotation stopping piece on the inner sheath, the rotation stopping piece is set to be of a columnar structure with an external thread at one end, and the rotation stopping piece is arranged in the threaded hole in a rotating mode. Alternatively, the fixing groove is formed as a dovetail groove, and the rotation preventing member is formed as a columnar structure having a spring claw provided thereon, and the spring claw is caught in the dovetail groove to fix the rotation preventing member in the fixing groove.
In the above embodiment, the rotation stopping members are arranged at four fixed positions and uniformly distributed in the circumferential direction of the inner sheath. In other embodiments, the rotation preventing member fixing positions may be provided in plural numbers such as two, three, five, etc., but it is preferable that the rotation preventing member fixing positions are uniformly distributed in the circumferential direction of the inner sheath. Or, the inner sheath is provided with a ring groove coaxial with the inner hole of the contact pin, at the moment, the fixed positions of the rotation stopping piece are infinite, and the rotation stopping piece can be installed at any position of the ring groove. Or the inner sheath is not provided with a fixed groove, the outer surface of the inner sheath forms a fixed position of the rotation stopping piece, and the rotation stopping piece is welded on the inner sheath.
In the above embodiments, the inner sheath has a flange, and the fixing groove is formed in the flange. In the above embodiment, the guiding structures at both ends of the optical fiber adapter are guiding grooves, in other embodiments, the guiding structures may also be elongated guiding keys, in which case, the rotation stopping member is provided with rotation stopping holes axially and circumferentially matched with the guiding keys, and the rotation stopping matching surfaces are hole walls of the rotation stopping holes.
The invention also provides an embodiment of the optical fiber plug, the specific structure of which is the same as that of the optical fiber plug in each embodiment of the optical fiber connector, and the details are not repeated here.
Claims (3)
1. An optical fiber connector comprises an optical fiber adapter and two optical fiber plugs matched with the optical fiber adapter, wherein the optical fiber adapter comprises an adapter shell, two ends of the adapter shell are respectively provided with a plug-in end matched with the two optical fiber plugs in a plug-in manner, the plug-in end of the adapter shell is provided with a guide structure used for guiding the corresponding optical fiber plug to be inserted, the optical fiber plug comprises an inner sheath and a contact pin arranged in the inner sheath, the contact pin is provided with a contact pin inner hole used for installing an optical fiber, the optical fiber connector is characterized by also comprising a rotation stopping piece used for being fixed on the inner sheath and marking the inclined direction of the end face of the optical fiber relative to the axis of the contact pin inner hole, the rotation stopping piece is provided with a rotation stopping matching surface used for being matched with the guide structure on the optical fiber adapter in an axial direction and a circumferential rotation, when the optical fiber connector is assembled, firstly, the optical fiber is installed in the inner hole of the contact pin, then the coaxiality of the optical fiber and the inner hole of the contact pin is detected by a special detector, if the optical fiber deflects in the inner hole of the contact pin, the rotation stopping key is fixedly installed at the position of the rotation stopping element which is closest to or farthest from the deflection direction of the optical fiber, which is equivalent to a given mark, at the moment, the rotation stopping key can play a role of guiding and stopping rotation, simultaneously, the deflection direction of the end face of the optical fiber relative to the axis of the inner hole of the contact pin is marked, two assembled optical fiber plugs are respectively inserted into the optical fiber adapters, the rotation stopping keys on the two optical fiber plugs respectively correspond to the guide structures at the two ends of the optical fiber adapters, and the guide structures are guide grooves, and the guiding groove at optic fibre adapter both ends all has one, and two guiding grooves are located the collinear same straight line that is on a parallel with the optic fibre adapter axis, and the optic fibre in the contact pin of grafting back both sides is inclined to same side to reduce the plug loss.
2. The fiber optic connector of claim 1, wherein the rotation stop member is an interference fit with the retention groove.
3. The optical fiber connector according to claim 1 or 2, wherein a flat surface is formed on an outer circumferential surface of the inner jacket, and the fixing groove is formed on the flat surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811451843.8A CN110208911B (en) | 2018-11-30 | 2018-11-30 | Optical fiber plug and optical fiber connector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811451843.8A CN110208911B (en) | 2018-11-30 | 2018-11-30 | Optical fiber plug and optical fiber connector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110208911A CN110208911A (en) | 2019-09-06 |
| CN110208911B true CN110208911B (en) | 2021-05-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811451843.8A Active CN110208911B (en) | 2018-11-30 | 2018-11-30 | Optical fiber plug and optical fiber connector |
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| Country | Link |
|---|---|
| CN (1) | CN110208911B (en) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1250172A (en) * | 1968-09-24 | 1971-10-20 | ||
| JP3483872B2 (en) * | 2002-05-22 | 2004-01-06 | 米沢電線株式会社 | Optical connector |
| CN2824861Y (en) * | 2005-10-28 | 2006-10-11 | 北京光电技术研究所 | Side-emitting laser fiber structure |
| EP2299305A4 (en) * | 2008-06-13 | 2017-11-15 | Fujikura, Ltd. | Connection method, connection tool, and connection jig for optical fiber |
| CN201926781U (en) * | 2010-12-02 | 2011-08-10 | 泰科电子(上海)有限公司 | Optical fiber connector |
| JP2013117664A (en) * | 2011-12-05 | 2013-06-13 | Sumitomo Electric Ind Ltd | Multicore optical fiber connection structure and method for manufacturing multicore optical fiber connection structure |
| CN204284744U (en) * | 2014-12-01 | 2015-04-22 | 武汉永力科技股份有限公司 | One is transferred locking device fast |
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2018
- 2018-11-30 CN CN201811451843.8A patent/CN110208911B/en active Active
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| CN110208911A (en) | 2019-09-06 |
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