JP2978585B2 - 光ファイバコネクタ用フェルール - Google Patents

光ファイバコネクタ用フェルール

Info

Publication number
JP2978585B2
JP2978585B2 JP3110748A JP11074891A JP2978585B2 JP 2978585 B2 JP2978585 B2 JP 2978585B2 JP 3110748 A JP3110748 A JP 3110748A JP 11074891 A JP11074891 A JP 11074891A JP 2978585 B2 JP2978585 B2 JP 2978585B2
Authority
JP
Japan
Prior art keywords
ferrule
cylindrical portion
optical fiber
fiber connector
outer diameter
Prior art date
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.)
Expired - Fee Related
Application number
JP3110748A
Other languages
English (en)
Other versions
JPH04318504A (ja
Inventor
和廣 徳留
敏明 江口
文明 持田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Honda Tsushin Kogyo Co Ltd
Original Assignee
Honda Tsushin Kogyo Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Honda Tsushin Kogyo Co Ltd filed Critical Honda Tsushin Kogyo Co Ltd
Priority to JP3110748A priority Critical patent/JP2978585B2/ja
Priority to US07/868,905 priority patent/US5218657A/en
Publication of JPH04318504A publication Critical patent/JPH04318504A/ja
Application granted granted Critical
Publication of JP2978585B2 publication Critical patent/JP2978585B2/ja
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24Coupling light guides
    • G02B6/36Mechanical coupling means
    • G02B6/38Mechanical coupling means having fibre to fibre mating means
    • G02B6/3807Dismountable connectors, i.e. comprising plugs
    • G02B6/3833Details of mounting fibres in ferrules; Assembly methods; Manufacture
    • G02B6/3845Details of mounting fibres in ferrules; Assembly methods; Manufacture ferrules comprising functional elements, e.g. filters
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24Coupling light guides
    • G02B6/36Mechanical coupling means
    • G02B6/38Mechanical coupling means having fibre to fibre mating means
    • G02B6/3807Dismountable connectors, i.e. comprising plugs
    • G02B6/3833Details of mounting fibres in ferrules; Assembly methods; Manufacture
    • G02B6/3834Means for centering or aligning the light guide within the ferrule
    • G02B6/3835Means for centering or aligning the light guide within the ferrule using discs, bushings or the like
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24Coupling light guides
    • G02B6/36Mechanical coupling means
    • G02B6/38Mechanical coupling means having fibre to fibre mating means
    • G02B6/3807Dismountable connectors, i.e. comprising plugs
    • G02B6/3833Details of mounting fibres in ferrules; Assembly methods; Manufacture
    • G02B6/3846Details of mounting fibres in ferrules; Assembly methods; Manufacture with fibre stubs
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24Coupling light guides
    • G02B6/36Mechanical coupling means
    • G02B6/38Mechanical coupling means having fibre to fibre mating means
    • G02B6/3807Dismountable connectors, i.e. comprising plugs
    • G02B6/3887Anchoring optical cables to connector housings, e.g. strain relief features
    • G02B6/38875Protection from bending or twisting
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24Coupling light guides
    • G02B6/36Mechanical coupling means
    • G02B6/38Mechanical coupling means having fibre to fibre mating means
    • G02B6/3807Dismountable connectors, i.e. comprising plugs
    • G02B6/381Dismountable connectors, i.e. comprising plugs of the ferrule type, e.g. fibre ends embedded in ferrules, connecting a pair of fibres
    • G02B6/3826Dismountable 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
    • G02B6/3829Bent or angled connectors
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24Coupling light guides
    • G02B6/36Mechanical coupling means
    • G02B6/38Mechanical coupling means having fibre to fibre mating means
    • G02B6/3807Dismountable connectors, i.e. comprising plugs
    • G02B6/3833Details of mounting fibres in ferrules; Assembly methods; Manufacture
    • G02B6/3854Ferrules characterised by materials
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24Coupling light guides
    • G02B6/36Mechanical coupling means
    • G02B6/38Mechanical coupling means having fibre to fibre mating means
    • G02B6/3807Dismountable connectors, i.e. comprising plugs
    • G02B6/3873Connectors using guide surfaces for aligning ferrule ends, e.g. tubes, sleeves, V-grooves, rods, pins, balls
    • G02B6/3874Connectors using guide surfaces for aligning ferrule ends, e.g. tubes, sleeves, V-grooves, rods, pins, balls using tubes, sleeves to align ferrules
    • G02B6/3877Split sleeves

Description

【発明の詳細な説明】
【0001】
【産業上の利用分野】本発明は、光通信や光計測等に用
いられる光ファイバコネクタ用フェルール(以下、単に
フェルールと言う)に関する。
【0002】
【従来の技術】従来、フェルールの構造は、図5に示す
ように、ジルコニアセラミックス等の硬質のセラミック
スを円筒状(外径2.5mm)に形成した本体20と、
ステンレス製等の金属材で形成された鍔部を有する係止
用筒体21とで構成され、前記本体20には光ファイバ
の外径と同様な孔径の微細な貫通孔23が設けられてい
る。該貫通孔23には光ファイバの素線を挿通して接着
剤(例えばエポキシ系接着剤)で十分に固着させる。
【0003】そして、このフェルール24を装着した中
継器用コネクタに使用すれば、例えば、図8に示すよう
になる。即ち、中継器用コネクタ22にアダプタ26を
介して、角型プラグ27と丸型プラグ28とを連結する
ものである。
【0004】この中継器用コネクタ22には、前記角型
プラグ27が強制挿入され爪部22aでロックされるよ
うになっている。また、前記アダプタ26には、中継器
用コネクタ22の締付ナット22bのネジ部によって該
中継器用コネクタ22が螺着され、前記丸型プラグ28
の締付ナット28aのネジ部によって該プラグ28が螺
着される。そして、前記中継器用コネクタ22には光フ
ァイバ整列用の割スリーブ32が設けられ、該割スリー
ブ32は図7(イ),(ロ)の正面図と側面図に示され
るような銅製等の金属製スリーブである。
【0005】上述のようにして角型プラグと丸型プラグ
がその軸心を合わせて連結され、光ファイバの整列が割
スリーブによってなされ、光信号が伝達されるものであ
る。
【0006】
【発明が解決しようとする課題】しかしながら、上述の
フェルールでは、前記割スリーブ32によって整列され
るものであって、図8の矢印に示すような力が加わる
と、中継器用コネクタ22のフェルール24は、その本
体20が硬質のセラミックであるために変形することが
なく、また、プラグ27,28のフェルール27a,2
8bも同様に変形しないので、結果的に最も弱い部分、
即ち割スリーブ32が広がってしまう。
【0007】また、図6に示すように、例えば光通信機
16の送受信端末に従来のフェルール24を使用した場
合にも、プラグ25に外圧力が加わると割スリーブ32
が変形しその口が広がってしまう。この結果、挿入損失
が大きくなり、光ファイバの連結接続の性能を著しく損
なうと言った欠点が存在した。
【0008】本発明は、上記の課題に鑑みてなされたも
ので、プラグ等に不測な外圧力が加わり、フェルールや
割スリーブに変形力が作用しても、この変形力をフェル
ールに湾曲作用させて巧みに吸収し、挿入損失を大きく
させない光ファイバコネクタ用フェルールを提供するこ
とを目的とする。
【0009】
【課題を解決するための手段】本発明の上記課題を解決
し上記目的を達成するための要旨は、先端側円筒部と、
後端側円筒部と、これらを連結する中間円筒部である本
体とで構成され、前記両端の円筒部が各々において中継
接続される光ファイバコネクタ用フェルールであって、
前記フェルールの先端側及び後端側の円筒部の外径に対
して中間円筒部の外径を、光ファイバの許容曲半径程度
に湾曲し、かつ、外部の圧力が解除されると元に復帰す
る程度に弾性を有する細径にしたことに存する。
【0010】
【作用】本発明に係るフェルールによれば、例えばプラ
グに不測の外圧力が加わったときに、フェルールの細径
にした中間円筒部が湾曲し、これにより当該外圧力を吸
収してアダプタの割スリーブにその口が広がる等の悪影
響を与えることがなくなり、挿入損失を大きくしないも
のである。
【0011】
【実施例】次に、本発明について図面を参照して説明す
る。図1は、本発明に係るフェルール1の縦断面図、図
2は他の実施例に係る一部を破断した正面図、図3は更
に他の実施例に係るフェルールの縦断面図である。
【0012】図1において、フェルール1は、セラミッ
クス製の先端側円筒部2と、同じくセラミックス製の後
端側円筒部3と、鍔部4を有するとともに細径の中間円
筒部5を有してなる本体6とで構成され、光ファイバを
挿入する貫通孔7が穿孔されている。
【0013】前記先端円筒部2の外径は2.5mmであ
り、後端側円筒部3の外径はそれより若干細くなってお
り、もちろん同じ外径としてもよいものである。そし
て、前記本体6の細径の中間円筒部5の外径を約0.7
mmとしたが、この外径を1mm以下とするのが好まし
いものである。該本体6はその材質を金属製、とりわけ
弾性のあるステンレスとしている。
【0014】フェルール1は、この他にも図2に示すよ
うに貫通孔7の途中において半径方向に横断する空隙を
設けてここに遮弊板8を嵌装して、光信号を減衰させる
ものにも適用できるものである。また、該遮弊板8を特
定波長の光信号のみを通過させるフィルターとして前記
空隙に嵌装して適用できるものである。この遮弊板8
は、後述にてプラグ等に外圧力が加わった場合を考慮す
ると、フェルール1の後端側円筒部3において設けるよ
うにするのが外圧の悪影響が少なくて望ましいものであ
る。
【0015】また、図3(イ)に示すように、全体をス
テンレス製の本体9としたもの、図3(ロ)のように先
端側及び後端側の円筒部10,11をステンレス製と
し、中間円筒部5をステンレスや銅合金等の金属製と
し、光ファイバの先端部と後端部とを内挿する部分をセ
ラミックス製円筒部12,13としたもの、図3(ハ)
のように光ファイバをその素線14と芯線15とを内挿
するようにしてこれを図3(ロ)の構成にしたもの、な
ど種々設計変更できるものである。
【0016】本発明に係るフェルール1を使用すると、
図4に示すような状態になる。即ち、図4(イ)におい
て、例えば、光通信機16の送受信端末にフェルール1
が使用されると、これに割スリーブ32で整列されてフ
ェルール24が挿入されたプラグ25に外部から圧力F
が加わると、フェルール1の中間円筒部5において湾曲
する。これにより前記割スリーブ32においては何等変
形がなく、従って挿入損失が不当に大きくなることがな
い。前記フェルール1の中間円筒部5の湾曲程度は、光
ファイバの許容曲半径程度であり、前記圧力Fが解除さ
れると中間円筒部5の湾曲が元に復帰するものである。
【0017】また、図4(ロ)では、フェルール1を中
継器に適用した場合を示しており、その作用,効果は図
4(イ)と同じであり説明を省略する。
【0018】
【発明の効果】以上説明したように、本発明の光ファイ
バコネクタ用フェルールは、先端側円筒部と、後端側円
筒部と、これらを連結する中間円筒部である本体とで構
成され、前記両端の円筒部が各々において中継接続され
る光ファイバコネクタ用フェルールであって、前記フェ
ルールの先端側及び後端側の円筒部の外径に対して中間
円筒部の外径を、光ファイバの許容曲半径程度に湾曲
し、かつ、外部の圧力が解除されると元に復帰する程度
に弾性を有する細径にしたので、前記中間円筒部が湾曲
することで外圧力を吸収することになり、整列用の割ス
リーブに悪影響を与えず、挿入損失が大きくなることが
ない。
【図面の簡単な説明】
【図1】本発明に係るフェルールの縦断面図である。
【図2】他の実施例に係るフェルールの一部を破断した
正面図である。
【図3】(イ)、(ロ)、(ハ)は更に他の実施例に係
るフェルールの縦断面図である。
【図4】(イ)、(ロ)は本発明に係るフェルールを使
用した場合の変形時における状態を示す説明図である。
【図5】従来例に係るフェルールの縦断面図である。
【図6】従来例に係るフェルールを使用して変形した時
の説明図である。
【図7】(イ)は割スリーブの側面図、(ロ)は同じく
正面図である。
【図8】従来例に係る光コネクタの縦断面図である。
【符号の説明】
1 本発明に係るフェルール、 2 先端側円筒部、 3 後端側円筒部、 4 鍔部、 5 中間円筒部、 6 フェルールの本体、 7 貫通孔。
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 実開 平2−21607(JP,U) 実開 平1−69202(JP,U) (58)調査した分野(Int.Cl.6,DB名) G02B 6/36 - 6/38

Claims (1)

    (57)【特許請求の範囲】
  1. 【請求項1】先端側円筒部と、後端側円筒部と、これら
    を連結する中間円筒部である本体とで構成され、前記両
    端の円筒部が各々において中継接続される光ファイバコ
    ネクタ用フェルールであって、 前記フェルールの先端側及び後端側の円筒部の外径に対
    して中間円筒部の外径を、光ファイバの許容曲半径程度
    に湾曲し、かつ、外部の圧力が解除されると元に復帰す
    る程度に弾性を有する細径にしたことを特徴としてなる
    光ファイバコネクタ用フェルール。
JP3110748A 1991-04-17 1991-04-17 光ファイバコネクタ用フェルール Expired - Fee Related JP2978585B2 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP3110748A JP2978585B2 (ja) 1991-04-17 1991-04-17 光ファイバコネクタ用フェルール
US07/868,905 US5218657A (en) 1991-04-17 1992-04-16 Optical fiber connecting ferrule including flexible intermediate section

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3110748A JP2978585B2 (ja) 1991-04-17 1991-04-17 光ファイバコネクタ用フェルール

Publications (2)

Publication Number Publication Date
JPH04318504A JPH04318504A (ja) 1992-11-10
JP2978585B2 true JP2978585B2 (ja) 1999-11-15

Family

ID=14543552

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3110748A Expired - Fee Related JP2978585B2 (ja) 1991-04-17 1991-04-17 光ファイバコネクタ用フェルール

Country Status (2)

Country Link
US (1) US5218657A (ja)
JP (1) JP2978585B2 (ja)

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