CN109839699B - High-reliability beam-expanding type optical fiber connector - Google Patents
High-reliability beam-expanding type optical fiber connector Download PDFInfo
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- CN109839699B CN109839699B CN201910191846.0A CN201910191846A CN109839699B CN 109839699 B CN109839699 B CN 109839699B CN 201910191846 A CN201910191846 A CN 201910191846A CN 109839699 B CN109839699 B CN 109839699B
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 40
- 238000007789 sealing Methods 0.000 claims abstract description 17
- 239000000919 ceramic Substances 0.000 claims description 34
- 230000004323 axial length Effects 0.000 claims description 3
- 239000003292 glue Substances 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims 1
- 230000003287 optical effect Effects 0.000 abstract description 11
- 230000005540 biological transmission Effects 0.000 abstract description 10
- 210000001503 joint Anatomy 0.000 description 8
- 238000005299 abrasion Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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- Mechanical Coupling Of Light Guides (AREA)
- Optical Couplings Of Light Guides (AREA)
Abstract
The invention provides a high-reliability beam-expanding type optical fiber connector, which solves the problems of short mechanical life, high loss and easy pollution of the optical fiber connector in the prior art. The optical fiber connector comprises a shell (1), a mounting plate assembly (2), a beam expanding contact piece (3), a sealing gasket (4) and a fixing clamp ring (5). The invention can reduce the relative movement of the beam expanding contact piece under the conditions of vibration and impact, thereby improving the reliability and the service life of the connector, avoiding the phenomenon of optical fiber breakage caused by the protrusion of the optical fiber, effectively avoiding the damage of the optical fiber, realizing the transmission of optical signals without the contact of the end surface and the end surface of the optical fiber, ensuring the excellent transmission of the optical signals and improving the service life of the optical fiber contact body and the optical fiber connector.
Description
Technical Field
The invention belongs to the technical field of optical fiber connectors, and relates to a high-reliability beam-expanding type optical fiber connector.
Background
The traditional optical fiber connector adopts the mode of end face-end face contact of an optical fiber contact body to realize optical path coupling so as to achieve the purpose of optical path transmission. In long-term use, the optical fiber connector exposes the problems of easy pollution of the optical fiber end face, damage of the optical fiber end face and the like, greatly influences the transmission of optical signals, has lower environmental resistance and mechanical life, and causes butt joint abrasion and increased loss due to easy rotation of the contact piece during butt joint.
Disclosure of Invention
In order to solve the technical problems, the invention provides a high-reliability beam-expanding type optical fiber connector with long mechanical service life and small loss.
In order to achieve the above purpose, the invention adopts the following technical scheme: a high-reliability beam-expanding type optical fiber connector comprises a shell, a mounting plate assembly, a beam-expanding contact piece, a sealing gasket and a fixing clamp ring;
the mounting plate assembly is arranged in the shell and is fixedly connected with the shell through a fixed clamping ring, the periphery of the front end of the mounting plate assembly is sleeved with a sealing gasket, and the sealing gasket is arranged in an annular groove in the inner periphery of the shell;
the mounting plate assembly comprises a front mounting plate, a rear mounting plate and a wire sealing body, wherein the front mounting plate and the rear mounting plate are fixed with a screw through a threaded sleeve, a first positioning hole and a second positioning hole which are coaxially arranged are respectively formed in the upper side and the lower side of the threaded sleeve, a short positioning pin is installed in the first positioning hole and the second positioning hole in an interference manner, a plurality of first hole cavities and second hole cavities which are coaxially arranged and used for installing beam expanding contacts are respectively arranged in the front mounting plate and the rear mounting plate on the left side and the right side of the threaded sleeve, and the beam expanding contacts axially penetrate through the first hole cavities and the second hole cavities; the wire sealing body is fixed at the tail end of the rear mounting plate through glue.
The beam expanding contact piece comprises a lens component, a ceramic ferrule, an inner shell, a spring and an outer shell; the inside of inner shell is equipped with the different step hole of diameter, the pottery lock pin passes through interference fit and installs in the minor diameter hole in step hole, lens assembly installs in the major diameter hole in step hole, the pottery lock pin inserts and fixes in the lens assembly, the spring housing is in the inner shell periphery and together place in the inside cavity of shell body front end, the front end of inner shell body is equipped with the bellied locating key in outside, the front end of shell body is equipped with the opening, the locating key is placed in the opening, and along axial displacement in the opening, the flexible outer shell body that drives of spring atress can reciprocate in the outer periphery axial of inner shell body, the preceding terminal surface of shell body closes up the processing, it is spacing to the axial activity of locating key with the opening cooperation.
Further, the opening is of an axial U-shaped structure, the radial width of the opening is matched with the width of the positioning key, the opening limits the radial movement of the positioning key in the opening, the axial length of the opening is greater than that of the positioning key, and the positioning key can move in the opening along the axial direction.
Further, a key slot is arranged in the front mounting plate, and the beam expanding contact piece is matched with the key slot through a positioning key, so that the beam expanding contact piece is fixed in a first cavity and a second cavity in the mounting plate assembly, and radial rotation of the beam expanding contact piece is prevented.
Further, the lens assembly comprises a self-focusing lens and a ceramic sleeve, wherein the self-focusing lens is glued and fixed on the inner periphery of the front end inside the ceramic sleeve, a space is reserved between the front end face of the self-focusing lens and the front end face of the ceramic sleeve, the ceramic sleeve is installed in a large-diameter hole of the inner shell in a clearance fit manner, the front end of the ceramic ferrule is inserted into the ceramic sleeve and is coaxial with the self-focusing lens, the front end face of the ceramic ferrule is positioned on the focal position of the self-focusing lens by adjusting the position of the tail end of the ceramic sleeve in the large-diameter hole, loss is reduced, and abrasion between the end faces can be prevented.
Further, the self-focusing lens is of a cylindrical structure.
Compared with the prior art, the invention has the following beneficial effects:
the mounting plate assembly is provided with the positioning holes, so that the positioning holes can play a role in accurate positioning when the connector is used in butt joint, and the relative movement of the beam expanding contact piece under the conditions of vibration and impact can be reduced, thereby improving the reliability and prolonging the service life of the connector.
The beam expansion contact piece adopts an anti-rotation structure, namely, the radial rotation of the beam expansion contact piece is prevented through the matching of the positioning key and the opening, the butt joint is accurate, the area with lower loss is fixed in one direction, and the loss is reduced. And the locating key is matched with the key groove of the front mounting plate to fix the beam expanding contact element in the mounting plate assembly well. The spring is arranged in the contact, the contact of the connector is stressed when in butt joint, the spring is stressed to stretch and contract to drive the outer shell to axially slide back and forth at the periphery of the inner shell, so that the stress of the contact can be reduced, and the contact with overlarge stress is prevented from being damaged;
the beam expansion contact piece adopts the self-focusing lens, can expand, collimate and converge the light beam, thereby increasing the diameter of a light spot, avoiding the phenomenon of optical fiber fracture caused by the protrusion of the optical fiber, effectively avoiding the damage of the optical fiber, realizing the transmission of the optical signal without the contact of the end face and the end face of the optical fiber, ensuring the excellent transmission of the optical signal, improving the service lives of the optical fiber contact body and the optical fiber connector and being not easy to pollute.
The high-reliability beam-expanding type optical fiber connector can be matched with an optical fiber connector with the same interface for use, and a plurality of optical fiber contacts are arranged, so that the transmission of multiple paths of optical signals can be realized.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic structural view of a mounting plate assembly;
FIG. 3 is a schematic structural view of a beam expanding contact;
FIG. 4 is a schematic perspective view of a beam expanding contact;
FIG. 5 is a schematic structural view of a lens assembly;
FIG. 6 is a schematic perspective view of the present invention;
FIG. 7 is a right side view of FIG. 6;
in the figure: 1-a housing; 1-1-annular groove;
2-a mounting plate assembly;
2-1-a front mounting plate; 2-1-1-first positioning holes; 2-1-2-first bore; 2-1-3-keyway;
2-2-rear mounting plate; 2-2-1-second positioning holes; 2-2-2-second bore;
2-3-wire sealing body;
3-beam expanding contacts;
3-1-lens assembly; 3-1-1-self focusing lens; 3-1-2-ceramic sleeve;
3-2-ceramic ferrule;
3-3-an inner shell; 3-3-1-step holes; 3-3-1-1-small diameter holes; 3-3-1-2-large diameter holes; 3-3-2-positional bond;
3-4-springs;
3-5-an outer shell;
3-5-1-cavity; 3-5-2-opening.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Examples
Referring to fig. 1, a high-reliability beam-expanding type optical fiber connector comprises a shell 1, a mounting plate assembly 2, a beam expanding contact 3, a sealing gasket 4 and a fixing clamp ring 5;
the mounting plate assembly 2 is arranged in the shell 1 and is fixedly connected with the shell 1 through a fixed clamping ring 5, a sealing gasket 4 is sleeved on the periphery of the front end of the mounting plate assembly 2, and the sealing gasket 4 is arranged in an annular groove 1-1 on the inner periphery of the shell 1;
referring to fig. 2, the mounting plate assembly 2 includes a front mounting plate 2-1, a rear mounting plate 2-2 and a wire sealing body 2-3, the front mounting plate 2-1 and the rear mounting plate 2-2 are fixed with a screw 7 through a threaded sleeve 6, the front mounting plate 2-1 and the rear mounting plate 2-2 are respectively provided with a first positioning hole 2-1 and a second positioning hole 2-2-1 coaxially arranged at the upper side and the lower side of the threaded sleeve 6, a short positioning pin 8 is installed in the first positioning hole 2-1 and the second positioning hole 2-1 in an interference manner, and a plurality of first cavities 2-1-2 and second cavities 2-2-2 coaxially arranged at the left side and the right side of the threaded sleeve 6 for installing beam expanding contacts are respectively arranged in the front mounting plate 2-1 and the rear mounting plate 2-2, and the beam expanding contacts 3 axially penetrate through the first cavities 2-1-2 and the second cavities 2-2-2; the wire sealing body 2-3 is fixed at the tail end of the rear mounting plate 2-2 by glue.
Referring to fig. 3-4, the beam expanding contact 3 includes a lens assembly 3-1, a ferrule 3-2, an inner housing 3-3, a spring 3-4, and an outer housing 3-5; the inside of the inner shell 3-3 is provided with stepped holes 3-3-1 with different diameters, the ceramic ferrule 3-2 is arranged in the small-diameter hole 3-3-1-1 of the stepped hole through interference fit, the lens component 3-1 is arranged in the large-diameter hole 3-3-1-2 of the stepped hole, the ceramic ferrule 3-2 is inserted into the lens component 3-1 to be fixed, the spring 3-4 is sleeved on the periphery of the inner shell 3-3 and is arranged in the inner cavity 3-5-1 at the front end of the outer shell 3-5 together, the front end of the inner shell 3-3 is provided with a positioning key 3-3-2 protruding outwards, the front end of the outer shell 3-5 is provided with an opening 3-5-2, the positioning key 3-3-2 is arranged in the opening 3-5-2 and moves axially in the opening 3-5-2, the spring 3-4 is driven to stretch and retract axially to drive the outer shell 3-5 to slide axially in the periphery of the inner shell 3-3, the front end face of the outer shell 3-5 is subjected to necking treatment, and the positioning key 3-2 is matched with the opening 3-2 to limit the axial movement of the positioning key 3-3-2.
The opening 3-5-2 is of an axial U-shaped structure, the radial width of the opening 3-5-2 is matched with the width of the positioning key 3-3-2, the opening 3-5-2 limits the radial movement of the positioning key 3-3-2 in the opening 3-5-2, the axial length of the opening 3-5-2 is greater than the length of the positioning key 3-3-2, and the positioning key 3-3-2 can move axially in the opening 3-5-2.
Referring to fig. 1, a key slot 2-1-3 is provided in the front mounting plate 2-1, and the beam expanding contact 3 is matched with the key slot 2-1-3 through a positioning key 3-3-2 to fix the beam expanding contact 3 in a first cavity 2-1-2 and a second cavity 2-2 in the mounting plate assembly 2, so as to prevent radial rotation of the beam expanding contact.
Referring to fig. 5, the lens assembly 3-1 includes a self-focusing lens 3-1-1 and a ceramic ferrule 3-1-2, the self-focusing lens 3-1-1 is adhesively fixed to the inner periphery of the front end inside the ceramic ferrule 3-1-2 with a space between the front end face of the self-focusing lens 3-1-1 and the front end face of the ceramic ferrule 3-1-2, the ceramic ferrule 3-1-2 is mounted in the large diameter hole 3-3-1-2 of the inner housing in a clearance fit, the front end of the ceramic ferrule 3-2 is inserted into the ceramic ferrule 3-1-2 coaxially with the self-focusing lens 3-1-1, and the front end face of the ceramic ferrule 3-2 is located at the focal position of the self-focusing lens 3-1 by adjusting the position of the rear end of the ceramic ferrule 3-1-2 in the large diameter hole 3-3-1-2, wear between the end faces can be reduced.
The self-focusing lens 3-1-1 has a cylindrical structure.
The ceramic sleeve 3-1-2 is a ceramic closed sleeve.
Referring to fig. 6 and 7, in this embodiment, there are 6 beam expansion contacts 3, which are evenly distributed on the left and right sides of the screw sleeve 6, and the positioning holes can perform an accurate positioning function during butt joint, and reduce the relative movement of the beam expansion contacts under vibration and impact conditions, thereby improving the reliability and the service life of the connector.
The beam expanding contact piece is matched with the opening through the positioning key and matched with the key groove of the front mounting plate, so that radial rotation of the beam expanding contact piece is prevented, the butt joint is accurate, the area with lower loss can be fixed in one direction, and the loss is reduced. The spring is arranged in the contact, the contact of the connector is stressed when in butt joint, the spring is stressed to stretch and contract to drive the outer shell to axially slide back and forth at the periphery of the inner shell, so that the stress of the contact can be reduced, and the contact with overlarge stress is prevented from being damaged;
the beam expansion contact piece adopts the self-focusing lens, can expand and collimate and converge the light beam, thereby increasing the diameter of a light spot, avoiding the phenomenon of optical fiber breakage caused by the protrusion of the optical fiber, effectively avoiding the damage of the optical fiber, realizing the transmission of the optical signal without the contact of the end face and the end face of the optical fiber, ensuring the excellent transmission of the optical signal, improving the service lives of the optical fiber contact body and the optical fiber connector and being not easy to pollute.
The high-reliability beam-expanding type optical fiber connector can be matched with an optical fiber connector with the same interface for use, and a plurality of beam-expanding contact pieces are arranged, so that the transmission of multiple paths of optical signals can be realized.
The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to assist in understanding the methods of the present invention and the core ideas thereof; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (3)
1. The high-reliability beam-expanding type optical fiber connector is characterized by comprising a shell (1), a mounting plate assembly (2), a beam-expanding contact piece (3), a sealing gasket (4) and a fixing clamp ring (5);
the mounting plate assembly (2) is arranged in the shell (1) and is fixedly connected with the shell (1) through the fixed snap ring (5), the periphery of the front end of the mounting plate assembly is sleeved with the sealing gasket (4), and the sealing gasket (4) is arranged in the annular groove (1-1) in the inner periphery of the shell (1);
the mounting plate assembly (2) comprises a front mounting plate (2-1), a rear mounting plate (2-2) and a wire sealing body (2-3), wherein the front mounting plate (2-1) and the rear mounting plate (2-2) are fixed with screws (7) through threaded sleeves (6), the front mounting plate (2-1) and the rear mounting plate (2-2) are respectively provided with a first positioning hole (2-1) and a second positioning hole (2-2-1) which are coaxially arranged at the upper side and the lower side of the threaded sleeves (6), short positioning pins (8) are installed in the first positioning holes (2-1) and the second positioning holes (2-2-1) in an interference manner, and a plurality of first cavities (2-1-2) and second cavities (2-2-2) which are coaxially arranged and used for installing beam expanding contacts are respectively arranged at the inner parts of the front mounting plate (2-1-1) and the rear mounting plate (2-2) at the left side and the right side of the threaded sleeves (6), and the beam expanding contacts (3) axially penetrate through the first cavities (2-1-2-2-2) and the second cavities (2-2-2-2); the wire sealing body (2-3) is fixed at the tail end of the rear mounting plate (2-2) through glue;
the beam expanding contact (3) comprises a lens assembly (3-1), a ceramic ferrule (3-2), an inner shell (3-3), a spring (3-4) and an outer shell (3-5); the inside of the inner shell (3-3) is provided with stepped holes (3-3-1) with different diameters, the ceramic ferrule (3-2) is arranged in the small-diameter hole (3-3-1-1) of the stepped hole through interference fit, the lens component (3-1) is arranged in the large-diameter hole (3-3-1-2) of the stepped hole, the ceramic ferrule (3-2) is inserted into the lens component (3-1) for fixation, the springs (3-4) are sleeved on the periphery of the inner shell (3-3) and are together arranged in the inner cavity (3-5-1) at the front end of the outer shell (3-5), the front end of the inner shell (3-3) is provided with a positioning key (3-3-2) protruding outwards, the front end of the outer shell (3-5) is provided with an opening (3-5-2), the positioning key (3-3-2) is arranged in the opening (3-5-2) and moves axially in the opening (3-5-2), the springs (3-4) drive the outer shell (3-5) to stretch out and draw back along the axial direction to the outer shell (3-5) to reciprocate to the front end face of the inner shell (3-5), the axial movement of the positioning key (3-3-2) is limited by matching with the opening (3-5-2);
the opening (3-5-2) is of an axial U-shaped structure, the radial width of the opening (3-5-2) is matched with the width of the positioning key (3-3-2), the opening (3-5-2) limits the radial movement of the positioning key (3-3-2) in the opening (3-5-2), the axial length of the opening (3-5-2) is greater than the length of the positioning key (3-3-2), and the positioning key (3-3-2) can move axially in the opening (3-5-2);
the front mounting plate (2-1) is internally provided with a key groove (2-1-3), and the beam expansion contact piece (3) is matched with the key groove (2-1-3) through a positioning key (3-3-2) to fix the beam expansion contact piece (3) in a first cavity (2-1-2) and a second cavity (2-2-2) in the mounting plate assembly (2) so as to prevent radial rotation of the beam expansion contact piece.
2. A highly reliable beam-expanding optical fiber connector as claimed in claim 1, wherein the lens assembly (3-1) comprises a self-focusing lens (3-1-1) and a ceramic ferrule (3-1-2), the self-focusing lens (3-1-1) is adhesively fixed to an inner periphery of a front end inside the ceramic ferrule (3-1-2), and a space is provided between a front end face of the self-focusing lens (3-1-1) and a front end face of the ceramic ferrule (3-1-2), the ceramic ferrule (3-1-2) is fitted in a large diameter hole (3-3-1-2) of the inner housing by clearance fit, a front end of the ceramic ferrule (3-2) is inserted into the ceramic ferrule (3-1-2) coaxially with the self-focusing lens (3-1-1), and the front end face of the ceramic ferrule (3-2) is located at a focal position of the self-focusing lens (3-1-1) by adjusting a position of a rear end of the ceramic ferrule (3-1-2) in the large diameter hole (3-3-1-2).
3. A highly reliable expanded beam fiber optic connector as claimed in claim 2, wherein said self focusing lens (3-1-1) is of cylindrical configuration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910191846.0A CN109839699B (en) | 2019-03-14 | 2019-03-14 | High-reliability beam-expanding type optical fiber connector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910191846.0A CN109839699B (en) | 2019-03-14 | 2019-03-14 | High-reliability beam-expanding type optical fiber connector |
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| Publication Number | Publication Date |
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| CN109839699A CN109839699A (en) | 2019-06-04 |
| CN109839699B true CN109839699B (en) | 2023-11-14 |
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| CN201910191846.0A Active CN109839699B (en) | 2019-03-14 | 2019-03-14 | High-reliability beam-expanding type optical fiber connector |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110568564A (en) * | 2019-09-06 | 2019-12-13 | 沈阳兴华航空电器有限责任公司 | High-reliability air-tight seal beam-expanding type optical fiber adapter |
| CN111430978A (en) * | 2020-04-20 | 2020-07-17 | 沈阳兴华航空电器有限责任公司 | A highly reliable optoelectronic hybrid connector |
| CN113448019A (en) * | 2021-07-09 | 2021-09-28 | 沈阳兴华航空电器有限责任公司 | Neutral detachable single-mode beam expanding optical fiber connector terminal |
| CN117260507B (en) * | 2023-11-08 | 2024-06-07 | 武汉富基科技有限公司 | Multi-core optical fiber connector manufacturing equipment and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU5801980A (en) * | 1979-05-08 | 1980-11-13 | International Standard Electric Corp. | Hermaphroditic optical fibre connector |
| CN103149642A (en) * | 2013-03-22 | 2013-06-12 | 上海理工大学 | Off-axis optical fiber rotary connector |
| CN108535812A (en) * | 2018-05-28 | 2018-09-14 | 沈阳兴华航空电器有限责任公司 | A kind of optical fiber beam expansion type lens subassembly |
| CN109425939A (en) * | 2017-09-01 | 2019-03-05 | 中航光电科技股份有限公司 | Optic fibre switching socket, optic fibre switching contact and fiber optic connector assembly |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0607574D0 (en) * | 2006-04-18 | 2006-05-24 | Fibreco Ltd | Expanded beam optical fibre connector |
| US8616781B2 (en) * | 2010-12-15 | 2013-12-31 | Innovative Intellectual Properties Llc | Expanded beam optical connector |
-
2019
- 2019-03-14 CN CN201910191846.0A patent/CN109839699B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU5801980A (en) * | 1979-05-08 | 1980-11-13 | International Standard Electric Corp. | Hermaphroditic optical fibre connector |
| CN103149642A (en) * | 2013-03-22 | 2013-06-12 | 上海理工大学 | Off-axis optical fiber rotary connector |
| CN109425939A (en) * | 2017-09-01 | 2019-03-05 | 中航光电科技股份有限公司 | Optic fibre switching socket, optic fibre switching contact and fiber optic connector assembly |
| CN108535812A (en) * | 2018-05-28 | 2018-09-14 | 沈阳兴华航空电器有限责任公司 | A kind of optical fiber beam expansion type lens subassembly |
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| CN109839699A (en) | 2019-06-04 |
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