CN111025489A - Optical fiber connection structure for radio frequency optical transmission link - Google Patents
Optical fiber connection structure for radio frequency optical transmission link Download PDFInfo
- Publication number
- CN111025489A CN111025489A CN201911288911.8A CN201911288911A CN111025489A CN 111025489 A CN111025489 A CN 111025489A CN 201911288911 A CN201911288911 A CN 201911288911A CN 111025489 A CN111025489 A CN 111025489A
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- China
- Prior art keywords
- sleeve
- ceramic
- pin
- plug
- optical fiber
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
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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
- G02B6/381—Dismountable connectors, i.e. comprising plugs of the ferrule type, e.g. fibre ends embedded in ferrules, connecting a pair of fibres
- G02B6/3826—Dismountable connectors, i.e. comprising plugs of the ferrule type, e.g. fibre ends embedded in ferrules, connecting a pair of fibres characterised by form or shape
- G02B6/3831—Dismountable connectors, i.e. comprising plugs of the ferrule type, e.g. fibre ends embedded in ferrules, connecting a pair of fibres characterised by form or shape comprising a keying element on the plug or adapter, e.g. to forbid wrong connection
-
- 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
- G02B6/389—Dismountable connectors, i.e. comprising plugs characterised by the method of fastening connecting plugs and sockets, e.g. screw- or nut-lock, snap-in, bayonet type
Abstract
An optical fiber connection structure for a radio frequency optical transmission link can guide a positioning key of a plug through a key groove formed in a metal sleeve, so that the advancing direction of a ceramic contact pin of the plug cannot deviate, the alignment degree of insertion of the ceramic contact pin when the ceramic contact pin is inserted into the ceramic sleeve is improved, the matching tolerance between the ceramic contact pin of the plug and the ceramic sleeve can be effectively reduced, and the purpose of reducing the insertion loss of the whole connector is finally achieved; when the ceramic sleeve and the socket ceramic pin are correspondingly sleeved, the socket ceramic pin and the ceramic sleeve are also in aligned insertion through the matching connection of the positioning key and the key groove; and through the cooperation between two navigation keys and the corresponding keyway, can enough guide the butt joint of ceramic contact pin, can also play the effect of preventing changeing to two contact pieces after navigation key and keyway cooperation are connected.
Description
Technical Field
The invention relates to the technical field of multi-core optical fiber butt joint, in particular to an optical fiber connecting structure for a radio frequency optical transmission link.
Background
As is known, radio frequency optical transmission is one of important applications of microwave photonics, and exhibits incomparable advantages in advanced fields such as microwave photon radar, astronomical radio telescope, unmanned aerial vehicle communication, and the like, while in a radio frequency optical transmission link, a multi-core optical fiber is used as a transmission line of an optical cable to transmit signals, but when a plug of the optical cable is correspondingly plugged with a socket of a connector, a ceramic pin of a contact element in the plug needs to be plugged with a ceramic pin of a corresponding contact element in the socket, and because most of currently transmitted signals are analog signals, the insertion loss of the connector needs to be reduced, thereby satisfying the consistency of signal transmission;
traditionally, the multi-stage guide is carried out on the contact pieces through two structures on the connector, thereby realizing the alignment and insertion of ceramic pins of the two contact pieces, the multi-stage guide is firstly used as a one-stage guide through the matching of the plug spline shell and the socket square disc shell, then the spline shell and the square disc shell are respectively matched with the metal shells in the socket and the plug correspondingly to be used as secondary guide, and finally, a ceramic sleeve is sleeved on a ceramic contact pin of a contact element in the socket, the ceramic pins of the contact elements in the plug are guided in a three-level way, and finally the ceramic pins of the two contact elements are inserted in the ceramic sleeve in a positive way, however, in the process of multi-stage guide plugging, the problem of fit tolerance exists in the guide step of each stage, and as the plugging guide stage number increases, the fit tolerance also increases, therefore, the alignment and the insertion of the two contact elements are influenced, and the insertion loss of the connector is larger; in addition, the connection structure does not have the function of preventing the ceramic contact pin from rotating in the ceramic sleeve, so that in actual work, the ceramic contact pin is lost due to the rotation of the ceramic contact pin in the ceramic sleeve, the signal transmission is influenced, and the insertion loss of the connector is increased finally;
chinese patent (CN201820428533.3) discloses a multi-core optical fiber connector assembly, wherein an anti-rotation structure of the multi-core optical fiber connector assembly is formed by a U-shaped anti-rotation opening arranged in an outer sleeve of the multi-core optical fiber connector assembly and an anti-rotation boss arranged at the head end of a contact piece tail handle, although the anti-rotation structure can protect ceramic contact pins after butt joint, the optical fiber connector still realizes the insertion connection between the ceramic contact pins through multi-stage matching guide in a shell when the optical fiber connector is inserted, so that the device still has the problem that the matching tolerance between the multi-stage guide can be accumulated, and the problem of larger contact loss of the connector cannot be improved; therefore, in summary, there is a need in the market for a fiber optic connection structure that can effectively reduce the insertion loss of the connector and ensure that the contacts of the plug and the receptacle can be aligned and plugged.
Disclosure of Invention
In order to overcome the defects in the background art, the invention discloses an optical fiber connection structure for an RF optical transmission link.
In order to achieve the purpose, the invention adopts the following technical scheme:
an optical fiber connection structure for a radio frequency optical transmission link comprises a plug, contact elements, ceramic sleeves and a socket, wherein a shell of the plug is correspondingly matched and spliced with a shell of the socket, a metal sleeve is sleeved on a pipe body of the ceramic sleeve, axial key grooves are respectively formed in the pipe bodies at two ends of the metal sleeve, the number of the contact elements is two, the contact elements comprise a rear sleeve, a front sleeve, a pin flange and a ceramic pin, a crimping sleeve used for compressing an optical cable tensile layer is arranged at the rear end of the rear sleeve, a spring is arranged in the front end of the rear sleeve, and the sleeve body at the front end of the rear sleeve is correspondingly in threaded connection with the front sleeve; one end face of the pin flange is provided with a flange, the other end face of the pin flange is provided with a positioning key, the flange end of the pin flange is correspondingly inserted into the spring, the outer edge face of the pin flange is correspondingly matched with the inner wall face of the front sleeve, and the inner hole of the pin flange is correspondingly matched and connected with the pin tail end of the ceramic pin; the rear ends of the rear sleeves of the two contact pieces are respectively and correspondingly arranged in the internal components of the plug and the socket, a pipe orifice at one end of the ceramic sleeve is correspondingly sleeved at the needle head end of the plug ceramic contact pin, a pipe orifice at the other end of the ceramic sleeve is used for correspondingly inserting and connecting with the needle head end of the socket ceramic contact pin, and key grooves at two ends of the metal sleeve are respectively and correspondingly matched and connected with positioning keys of two contact pin flanges;
preferably, the pipe body of the metal sleeve is provided with an anti-rotation boss, and the plug is internally provided with a groove correspondingly matched with the anti-rotation boss;
preferably, the length of the positioning key is shorter than that of the ceramic pin;
preferably, the key grooves are both designed into U-shaped grooves, and the two positioning keys are correspondingly matched with the key grooves;
preferably, the key groove is an open through groove;
preferably, the opening edge of the key slot is set to be a round angle;
preferably, the outer edge surface of the contact pin flange is provided with two symmetrical bosses, and the inner wall surface of the front sleeve is provided with axial grooves corresponding to the bosses;
preferably, the rear sleeve body of the rear sleeve is provided with a step surface lower than the sleeve body, and the step surface is positioned in the compression joint sleeve;
preferably, the end faces of the needle heads of the two ceramic contact pins are ground in an APC mode.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
according to the optical fiber connection structure for the radio frequency optical transmission link, the key groove arranged on the metal sleeve can guide the positioning key of the plug when the two contact elements are plugged, so that the advancing direction of the ceramic contact pin of the plug cannot deviate, the plugging alignment degree of the ceramic contact pin of the plug when the ceramic contact pin is plugged into the ceramic sleeve is improved, and the matching tolerance between the ceramic contact pin and the ceramic sleeve can be effectively reduced through the matching guiding of the positioning key and the key groove, so that the purpose of reducing the insertion loss of the connector is finally achieved; when the ceramic sleeve and the socket ceramic pin are correspondingly sleeved, the socket ceramic pin and the ceramic sleeve are also in aligned insertion through the matching connection of the positioning key of the socket and the corresponding key groove; and through the cooperation between two navigation keys and the corresponding keyway, can enough play the guide effect to the butt joint of ceramic contact pin, can also play the effect of preventing changeing to two contact pieces after navigation key and keyway cooperation are connected.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic diagram of a plug-in structure of a plug and a socket;
FIG. 3 is a schematic view of a contact structure;
fig. 4 is a schematic structural diagram of two contact elements in a plugging manner.
In the figure: 1. a plug; 2. a socket; 3. a ceramic bushing; 4. a metal sleeve; 4.1, a key groove; 4.2, preventing the boss from rotating; 5. a rear sleeve; 6. a crimping sleeve; 7. a spring; 8. a front cover; 9. inserting a pin flange; 9.1, a flange; 9.2, a positioning key; 10. ceramic pins.
Detailed Description
The present invention will be explained in detail by the following examples, which are disclosed for the purpose of protecting all technical improvements within the scope of the present invention.
The optical fiber connection structure for the radio frequency optical transmission link described in conjunction with the attached drawings 1-4 comprises a plug 1, a contact, a ceramic sleeve 3 and a socket 2, wherein the shell of the plug 1 is correspondingly matched and inserted with the shell of the socket 2, the body of the ceramic sleeve 3 is sleeved with a metal sleeve 4, in addition, the body of the metal sleeve 4 is provided with an anti-rotation boss 4.2, a groove correspondingly matched with the anti-rotation boss 4.2 is arranged in the plug 1, the anti-rotation structure is formed by matching the anti-rotation boss 4.2 with the groove of the plug 1, the ceramic sleeve 3 can be prevented from rotating because the metal sleeve 4 rotates in the plug 1, and the ceramic pin 10 in the ceramic sleeve 3 is finally rotated to cause damage, the body of the two ends of the metal sleeve 4 are respectively provided with axial key grooves 4.1, the key grooves 4.1 are set as open through grooves as required, the matching precision between the positioning keys 9.2 and the key grooves 4.1 is not reduced, the degree of freedom of the positioning key 9.2 in matching with the key groove 4.1 can be increased, and the opening edge of the key groove 4.1 is set to be a round angle, so that the guiding effect of the key groove 4.1 can be improved;
the contact parts are two, and the contact parts comprise a rear sleeve 5, a front sleeve 8, a pin flange 9 and a ceramic pin 10, the rear end of the rear sleeve 5 is provided with a crimping sleeve 6 for compressing the tensile layer of the optical cable, the fiber core of the optical cable extends into the rear sleeve 5 to the needle hole in the ceramic contact pin 10, in addition, the rear sleeve body of the rear sleeve 5 is provided with a step surface lower than the sleeve body, the step surface is positioned in the crimping sleeve 6, when in use, the crimping sleeve 6 is firstly sleeved on the optical cable, then the step surface is inserted into the optical cable tensile resistance layer, finally, the crimping sleeve 6 is matched and connected with the optical cable and the rear sleeve 5 to achieve the purpose of laminating the tensile resistance of the optical cable on the step surface of the rear sleeve 5, and the protruding amount of the sleeve body of the pressure welding sleeve 6 and the sleeve body of the rear sleeve 5 can be reduced through the step surface, a spring 7 is arranged in the front end of the rear sleeve 5, the sleeve body at the front end of the rear sleeve 5 is correspondingly in threaded connection with the front sleeve 8, and the front sleeve 8 can fix the position of a contact pin flange 9 correspondingly inserted with the spring 7;
one end face of the pin flange 9 is provided with a flange 9.1, the other end face of the pin flange 9 is provided with a positioning key 9.2, the flange 9.1 end of the pin flange 9 is correspondingly inserted with the spring 7, and after the ceramic pin 10 of the plug 1 is correspondingly inserted with the ceramic sleeve 3, the pin flange 9 drives the spring 7 to compress so as to drive the fiber core of the optical cable to retreat, so that the situation that when external force acts on the optical cable, the advancing direction of the ceramic pin 10 is influenced, namely the alignment degree between the ceramic pin 10 and the ceramic sleeve 3 is influenced, and finally the insertion loss of the connector is increased can be avoided; the outer edge surface of the pin flange 9 is correspondingly matched with the inner wall surface of the front sleeve 8, two symmetrical bosses are arranged on the outer edge surface of the pin flange 9 according to needs, axial grooves are arranged on the inner wall surface of the front sleeve 8 corresponding to the bosses, and the pin flange 9 can move axially in the front sleeve 8 and can be ensured not to shake in the front sleeve 8 through the matching of the bosses and the grooves of the front sleeve 8, and an inner hole of the pin flange 9 is correspondingly matched and connected with a pin tail end of the ceramic pin 10;
the rear ends of the rear sleeves 5 of the two contact elements are respectively and correspondingly arranged in the internal assemblies of the plug 1 and the socket 2, the plug 1 and the shell of the socket 2 are correspondingly matched and spliced, so that the splicing between the two contact elements can be guided, a pipe orifice at one end of the ceramic sleeve 3 is correspondingly sleeved on a needle head end of the ceramic pin 10 of the plug 1 and correspondingly spliced, a pipe orifice at the other end of the ceramic sleeve 3 is used for being connected with a needle head end of the ceramic pin 10 of the socket 2, the ceramic sleeve 3 can further guide the ceramic pin 10 of the two contact elements, in addition, the needle head end faces of the two ceramic pins 10 are ground in an APC (automatic Power control) mode, the return loss performance index of the whole connector can be effectively improved, the connector is ensured to achieve the purposes of low loss, high return loss and high consistency performance, and the use requirement of an RF (radio;
the positioning key 9.2 of two contact pin flanges 9 corresponds the cooperation with the keyway 4.1 at metal sleeve 4 both ends respectively and is connected, because ceramic contact pin 10's butt joint face is the inclined plane, consequently is connected through the cooperation of positioning key 9.2 with keyway 4.1, can carry out accurate direction to the grafting of two ceramic contact pins 10 to effectively improve the degree of adjusting well when two ceramic contact pins 10 are pegged graft, and then effectively reduce the insertion loss of connector, as required, the length of positioning key 9.2 is shorter than the length of ceramic contact pin 10, makes the syringe needle terminal surface of ceramic contact pin 10 when grinding, can prevent that positioning key 9.2 from causing the interference to the grinding process.
The present invention is not described in detail in the prior art.
Claims (9)
1. An optical fiber connection structure for a radio frequency optical transmission link, characterized by: the plug comprises a plug (1), a contact, a ceramic sleeve (3) and a socket (2), wherein the shell of the plug (1) is correspondingly matched and spliced with the shell of the socket (2), a metal sleeve (4) is sleeved on a tube body of the ceramic sleeve (3), axial key grooves (4.1) are respectively formed in tube bodies at two ends of the metal sleeve (4), the contact is divided into two parts, the contact comprises a rear sleeve (5), a front sleeve (8), a pin flange (9) and a ceramic pin (10), a crimping sleeve (6) used for compressing an optical cable tensile layer is arranged at the rear end of the rear sleeve (5), a spring (7) is arranged in the front end of the rear sleeve (5), and the sleeve body at the front end of the rear sleeve (5) is correspondingly in threaded connection with the front sleeve (8); a flange (9.1) is arranged on one end face of the pin flange (9), a positioning key (9.2) is arranged on the other end face of the pin flange (9), the flange (9.1) end of the pin flange (9) is correspondingly inserted into the spring (7), the outer edge face of the pin flange (9) is correspondingly matched with the inner wall face of the front sleeve (8), and an inner hole of the pin flange (9) is correspondingly matched and connected with the pin tail end of the ceramic pin (10); the rear ends of rear sleeves (5) of the two contact pieces are correspondingly installed in internal assemblies of the plug (1) and the socket (2) respectively, a pipe orifice at one end of the ceramic sleeve (3) is correspondingly sleeved at a needle head end of the ceramic pin (10) of the plug (1), a pipe orifice at the other end of the ceramic sleeve (3) is used for being correspondingly inserted with the needle head end of the ceramic pin (10) of the socket (2), and key grooves (4.1) at two ends of the metal sleeve (4) are correspondingly matched and connected with positioning keys (9.2) of two pin flanges (9) respectively.
2. The optical fiber connection structure for an rf optical transmission link according to claim 1, wherein: the pipe body of metal sleeve (4) is equipped with prevents changeing boss (4.2), and is equipped with in plug (1) and prevents changeing the recess that boss (4.2) corresponds the complex.
3. The optical fiber connection structure for an rf optical transmission link according to claim 1, wherein: the length of the positioning key (9.2) is shorter than that of the ceramic pin (10).
4. The optical fiber connection structure for an rf optical transmission link according to claim 1, wherein: the key groove (4.1) is a U-shaped groove, and the two positioning keys (9.2) are correspondingly matched with the key groove (4.1).
5. The optical fiber connection structure for an rf optical transmission link according to claim 1, wherein: the key groove (4.1) is an open through groove.
6. The optical fiber connection structure for an rf optical transmission link according to claim 6, wherein: the opening edge of the key groove (4.1) is designed to be a round angle.
7. The optical fiber connection structure for an rf optical transmission link according to claim 1, wherein: the outer edge surface of the pin flange (9) is provided with two symmetrical bosses, and the inner wall surface of the front sleeve (8) is provided with a groove corresponding to the bosses.
8. The optical fiber connection structure for an rf optical transmission link according to claim 1, wherein: the rear end sleeve body of the rear sleeve (5) is provided with a step surface lower than the sleeve body, and the step surface is positioned in the crimping sleeve (6).
9. The optical fiber connection structure for an rf optical transmission link according to claim 1, wherein: the end faces of the needle heads of the two ceramic contact pins (10) are ground in an APC mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911288911.8A CN111025489A (en) | 2019-12-13 | 2019-12-13 | Optical fiber connection structure for radio frequency optical transmission link |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911288911.8A CN111025489A (en) | 2019-12-13 | 2019-12-13 | Optical fiber connection structure for radio frequency optical transmission link |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111025489A true CN111025489A (en) | 2020-04-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911288911.8A Pending CN111025489A (en) | 2019-12-13 | 2019-12-13 | Optical fiber connection structure for radio frequency optical transmission link |
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| CN (1) | CN111025489A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4867523A (en) * | 1988-10-28 | 1989-09-19 | American Telephone And Telegraph Company, At&T Bell Laboratories | Optical fiber connector including serpentine grooved member actuated by longitudinal forces |
| CN103901554A (en) * | 2014-03-12 | 2014-07-02 | 中航光电科技股份有限公司 | Small high-density multi-core optical fiber connector |
| CN105425344A (en) * | 2015-11-23 | 2016-03-23 | 中航光电科技股份有限公司 | Fiber terminal and connector |
| CN106842437A (en) * | 2017-03-31 | 2017-06-13 | 中航光电科技股份有限公司 | A kind of APC types joints of optical fibre and its optical fiber contact |
| US9835808B2 (en) * | 2013-01-23 | 2017-12-05 | Commscope, Inc. Of North Carolina | Cylindrical optical ferrule alignment apparatus |
| CN106199848B (en) * | 2016-08-31 | 2018-07-03 | 中航光电科技股份有限公司 | A kind of optical fiber connector plug |
-
2019
- 2019-12-13 CN CN201911288911.8A patent/CN111025489A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4867523A (en) * | 1988-10-28 | 1989-09-19 | American Telephone And Telegraph Company, At&T Bell Laboratories | Optical fiber connector including serpentine grooved member actuated by longitudinal forces |
| US9835808B2 (en) * | 2013-01-23 | 2017-12-05 | Commscope, Inc. Of North Carolina | Cylindrical optical ferrule alignment apparatus |
| CN103901554A (en) * | 2014-03-12 | 2014-07-02 | 中航光电科技股份有限公司 | Small high-density multi-core optical fiber connector |
| CN105425344A (en) * | 2015-11-23 | 2016-03-23 | 中航光电科技股份有限公司 | Fiber terminal and connector |
| CN106199848B (en) * | 2016-08-31 | 2018-07-03 | 中航光电科技股份有限公司 | A kind of optical fiber connector plug |
| CN106842437A (en) * | 2017-03-31 | 2017-06-13 | 中航光电科技股份有限公司 | A kind of APC types joints of optical fibre and its optical fiber contact |
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Application publication date: 20200417 |