JPS6163805A - Production of optical connector and ferrule for optical connector - Google Patents

Production of optical connector and ferrule for optical connector

Info

Publication number
JPS6163805A
JPS6163805A JP18613584A JP18613584A JPS6163805A JP S6163805 A JPS6163805 A JP S6163805A JP 18613584 A JP18613584 A JP 18613584A JP 18613584 A JP18613584 A JP 18613584A JP S6163805 A JPS6163805 A JP S6163805A
Authority
JP
Japan
Prior art keywords
optical fiber
ferrule
metal pipe
mold
molding
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.)
Granted
Application number
JP18613584A
Other languages
Japanese (ja)
Other versions
JPH0536762B2 (en
Inventor
Toshiaki Kakii
俊昭 柿井
Koichiro Matsuno
松野　幸一郎
Shuzo Suzuki
鈴木　修三
Hiroshi Ishihara
石原　浩志
Fumihiro Ashitani
芦谷　文博
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.)
Nippon Telegraph and Telephone Corp
Sumitomo Electric Industries Ltd
Original Assignee
Nippon Telegraph and Telephone Corp
Sumitomo Electric Industries 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 Nippon Telegraph and Telephone Corp, Sumitomo Electric Industries Ltd filed Critical Nippon Telegraph and Telephone Corp
Priority to JP18613584A priority Critical patent/JPS6163805A/en
Priority to AU46985/85A priority patent/AU572342B2/en
Priority to CA000489918A priority patent/CA1270682A/en
Priority to US06/788,404 priority patent/US4708433A/en
Priority to DE8585111146T priority patent/DE3582102D1/en
Priority to EP85111146A priority patent/EP0174013B1/en
Publication of JPS6163805A publication Critical patent/JPS6163805A/en
Priority to AU12500/88A priority patent/AU586946B2/en
Publication of JPH0536762B2 publication Critical patent/JPH0536762B2/ja
Granted legal-status Critical Current

Links

Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14467—Joining articles or parts of a single article
    • 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
    • G02B6/3865—Details of mounting fibres in ferrules; Assembly methods; Manufacture fabricated by using moulding techniques
    • 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
    • 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
    • G02B6/3885—Multicore or multichannel optical connectors, i.e. one single ferrule containing more than one fibre, e.g. ribbon type
    • 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
    • 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
    • G02B6/3874—Connectors using guide surfaces for aligning ferrule ends, e.g. tubes, sleeves, V-grooves, rods, pins, balls using tubes, sleeves to align ferrules
    • G02B6/3875—Floatingly supported sleeves
    • 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
    • G02B6/3874—Connectors using guide surfaces for aligning ferrule ends, e.g. tubes, sleeves, V-grooves, rods, pins, balls using tubes, sleeves to align ferrules
    • G02B6/3877—Split sleeves

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Mechanical Coupling Of Light Guides (AREA)

Abstract

PURPOSE:To attain highly accurate positioning precisely by setting up metallic pipes into which an optical fiber core partially removed at its coat is inserted and a molding connection pin in a metal mold, injecting molding resin to mold them collectively, and then diving the mold at its center part. CONSTITUTION:An optical fiber bare wire 2 partially removed at its coat is inserted into metallic pipes 11 and supported in a direction along the center axis line of the metallic pipes 11, these wire 2 and pipes 11 are set up in a metal mold 13 by using an optical fiber bare wire fixing member 14, a molding connection pin 15 is inserted into the metal mold, and then mold resin is injected and hardened. Then, the collective mold is taken out from the metal mold 13, the connection pin 15 is pulled out, th mold is cut off at its center, and the cut end surfaces are ground. The two obtained ferrules 17 are inserted into a sleave 7 and their end surfaces are joined and a connection pin 6 is inserted into holes 9 formed on collar parts 10 to optically connect them. After connecting the ferrules, the unit is pressed and fixed in the axial direction by a fixing housing 12. Thus, highly accurate optical connectors and ferrules can be obtained.

Description

【発明の詳細な説明】 ［技術分野コ 本発明は、ンングルモードファイバ用に代表される、詩
精度な位置決めが要求される光コネクタおよび同フェル
ールの製造方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to an optical connector that requires highly accurate positioning, typically for use in single-mode fibers, and a method for manufacturing the same ferrule.

［従来技術と問題点コ 第８図に従来の光コネクタの一例を断面図で示す。図に
おいて、１は被覆を有する光ファイバ心線を示し、２は
先端の被覆を除去した光ファイバ裸線（ガラス部）を示
している。３はメタルフェルールを示し、ｌＯはそのつ
ば部であり、メタルフェルール３には被覆を有する光フ
ァイバ心線１およびその先につながる、被覆を除去した
光ファイバ１宋線２をＩ１ｐ通させる、大径の孔５′と
これにっながる微細孔５が形成され、前記孔に先端の被
覆を除去した光ファイバ心線１が挿通され、ｉｌｉｉ記
光ファイバ裸線２は微細孔５におさまり、被覆を有す、
る光ファイバ心線１は孔中の段部で止まり、光ファイバ
心線１と孔５′，５とが作る空隙には接着剤４が充填さ
れ、光ファイバ心線ｌはメタルフェルール３に固着され
る。メタルフェルール３の端面より突出する光ファイバ
裸線２を切断研磨して端面をメタルフェルール３の端面
と同一面をなすように仕上げれば、光コネクタ用の光フ
ァイバを備えるメタルフェルールができあがる。[Prior Art and Problems] FIG. 8 shows a cross-sectional view of an example of a conventional optical connector. In the figure, 1 indicates a coated optical fiber, and 2 indicates a bare optical fiber (glass portion) from which the coating is removed from the tip. 3 indicates a metal ferrule, lO is its brim, and the metal ferrule 3 has a coated optical fiber 1 and an optical fiber 1 with the coating removed, which is connected to the tip of the Sung wire 2, passed through I1p. A diameter hole 5' and a fine hole 5 connected thereto are formed, the coated optical fiber 1 with the tip coating removed is inserted into the hole, and the bare optical fiber 2 described in iii is fitted into the fine hole 5. , having a coating,
The optical fiber core 1 stops at the step in the hole, and the gap created between the optical fiber core 1 and the holes 5' and 5 is filled with adhesive 4, and the optical fiber core l is fixed to the metal ferrule 3. be done. By cutting and polishing the bare optical fiber 2 protruding from the end surface of the metal ferrule 3 so that the end surface is flush with the end surface of the metal ferrule 3, a metal ferrule equipped with an optical fiber for an optical connector is completed.

゛　　ところで、高精度光コネクタの一例としてンング
ルモードファイバ用コネクタの場合、シノグルモードフ
ァイバは、外径１２５μｍに対してコア径ＩＯμｍと非
常に小さく、位置決め精度としてもｌμｍ以下が要求さ
れる。例えば外径に対するファイバ孔径の偏心は、最大
でも１μｍ以下にしなくては、１　ｄＢ以下の結合損失
を得ることは困難である。By the way, in the case of a single-mode fiber connector as an example of a high-precision optical connector, the sinoggle mode fiber has a very small core diameter of 10 μm compared to an outer diameter of 125 μm, and a positioning accuracy of 1 μm or less is required. For example, it is difficult to obtain a coupling loss of 1 dB or less unless the eccentricity of the fiber hole diameter with respect to the outer diameter is at most 1 μm or less.

更に、偏心を１μｍ以下に抑えたとしても、レングルモ
ールドファイバのクラノドに対するコアの偏心が１　ａ
ｍ以上あれば、結果的には１ｄＢ以上の結合損失が生ず
る。その為、通常は、ｔＴｉｊ述のような光ファイバを
備えるメタルフェルールにおいてハ、光ファイバ裸線の
コア部を中心にフェルール外径を研削加工しているが、
このような加工方式では、量産性に乏しく、高価になる
という欠点がある。Furthermore, even if the eccentricity is suppressed to 1 μm or less, the eccentricity of the core with respect to the crannode of the L'Engle molded fiber is 1 a
If it is more than m, a coupling loss of 1 dB or more will result. For this reason, normally, in a metal ferrule equipped with an optical fiber as described above, the outer diameter of the ferrule is ground around the core of the bare optical fiber.
Such a processing method has the drawbacks of poor mass productivity and high cost.

［発明の目的．構成コ 本発明は、前述のような欠点を克服し、高精度が要求さ
れる光コネクタと１１１ｆ記光フネクタ用フエルールの
生産効率の極めて高い製造方法を提供するものである。[Object of the invention. The present invention overcomes the above-mentioned drawbacks and provides a highly efficient manufacturing method for optical connectors that require high precision and ferrules for 111F optical connectors.

本発明は端的に云えば、金型中に、一郎被覆を除去し、
光ファイバ裸線を露出させた光ファイバ心線を配置し、
前記光ファイバ裸線を境界として、二個のフェルールを
モールド樹脂により成形するとともに、嵌合位置決め用
の連結用ピンの孔部を形成し、成形後二つのフェルール
に分離し、実際の光接続時には、前記分離したフェルー
ルをさきの成形時における両フェルールの相互位置を維
持したままの状態で接続できるように構成したものであ
って、接続における光ファイバのコア同志の芯あわせを
極めて簡単にしたものである。To put it simply, the present invention removes the Ichiro coating in the mold,
Arrange the optical fiber core with the bare optical fiber exposed,
Two ferrules are molded using mold resin with the bare optical fiber as a boundary, and a hole for a connecting pin for fitting positioning is formed. After molding, the two ferrules are separated and used for actual optical connection. , the separated ferrules are configured so that they can be connected while maintaining the mutual positions of both ferrules during the previous molding, and it is extremely easy to align the cores of the optical fibers during connection. It is.

以下図面に示す実施例により本発明を説明する。The present invention will be explained below with reference to embodiments shown in the drawings.

以下図において第８図と同一部分には同一符号が用いら
れる。In the following figures, the same reference numerals are used for the same parts as in FIG. 8.

ｍｌ図（イ）は実施例を長さ方向断面図示し、同（ｒ＋
）は正面図である。The ml diagram (a) shows a cross-sectional view of the example in the longitudinal direction, and the same (r+
) is a front view.

１７はフェルール全体を示す。１１は金属パイプ、１Ｇ
はフェルール＋７のつば部、９はつば部１０に形成され
た孔部であり、光ファイバ心線１の被覆を一郎除去して
、光ファイバ裸線２を露出させ、前記金属パイプＩ１に
挿通させた状態で、モールド樹脂８によって一体に成形
されたものである。従って、孔部９を訂するつば部１０
は金属パイプ１１と一体に、且つ金属パイプＨの内側は
前記モールド樹脂８で充填されｓ　ｉｌ＋記光ファイバ
株線２は一定位置で固定される。17 indicates the entire ferrule. 11 is a metal pipe, 1G
9 is a flange of the ferrule +7, and 9 is a hole formed in the flange 10. The coating of the optical fiber core 1 is removed to expose the bare optical fiber 2, which is inserted into the metal pipe I1. It is integrally molded with mold resin 8 in this state. Therefore, the collar 10 that corrects the hole 9
is integrated with the metal pipe 11, and the inside of the metal pipe H is filled with the molding resin 8, so that the optical fiber stock 2 is fixed at a fixed position.

このようなフェルールの製造については、後に詳述する
が、同時に光ファイバ裸線２を』（通にして成形された
光ファイバを備えるフェルールを対として、スリーブ７
の両端より挿入し、嵌合させ、両フェルール１７の端面
を接合した状態とし、前記両フェルール１７のつば部１
０に形成した孔９に連結用ピン６を通して、回転方向の
位置決めを行って、光接続部を＋ｌが成する。The manufacturing of such a ferrule will be described in detail later, but at the same time, a pair of ferrules each having an optical fiber formed by passing the bare optical fiber 2 through the sleeve 7
are inserted from both ends of the ferrules 17 and fitted, so that the end surfaces of both ferrules 17 are joined.
The connecting pin 6 is passed through the hole 9 formed at 0, and positioning in the rotational direction is performed to form an optical connection section.

このようにして構成された光接続部は第２図（イ）、（
ロ）に示すように、フェルール１７間を軸方向に加圧し
て固定するため、固定用ハウジング１２を有している。The optical connection section configured in this way is shown in Fig. 2 (A) and (
As shown in (b), a fixing housing 12 is provided in order to pressurize and fix the ferrules 17 in the axial direction.

固定用ハウジング１２はフェルール１７を軸方向に加圧
するタイプのものであればよく、図示のような金１ｉ１
ｆｉｌｉｌＥスプリングによるつば部１Ｇの抑圧タイプ
のものでなく、複数の部品よりなる／％ウンング部材を
用いても問題はなく、フェルール１７の上下等の固定方
向にも前述のような固定手段を採ることができる。The fixing housing 12 may be of a type that presses the ferrule 17 in the axial direction, and may be made of gold 1i1 as shown in the figure.
There is no problem in using a hinge member made of multiple parts instead of the type that suppresses the flange 1G using a fililE spring, and the above-mentioned fixing means can also be used in the fixing directions such as the top and bottom of the ferrule 17. I can do it.

次に本発明の製造方法について説明する。第３図は本発
明実施の説明図である。Ｉ３は成形用の金型（上面図）
であり、例えば長さ方向に２つ割りの部分からなり、す
でに説明した第１図に示すような、同時に、二個のフェ
ルールを成形できる型面を具えている。なお金型１３の
ルロ、ランナー等は示していない。Next, the manufacturing method of the present invention will be explained. FIG. 3 is an explanatory diagram of the implementation of the present invention. I3 is the mold for molding (top view)
For example, it is divided into two parts in the length direction, and has a mold surface capable of molding two ferrules at the same time, as shown in FIG. 1, which has already been described. The luro, runner, etc. of money mold 13 are not shown.

被覆を除去し、その光ファイパン東線２を　露出させた
光ファイバ心線１を二本の金属パイプ１１に通し、両金
属パイプ１１の間で、＋］ｉｉ記裸線２を例えば２つ、
や１りの固定部材１４を介在させ、＋ｌｉｉ記固定部材
１４に両金属パイプＩＩの端面を接合した状態で、前記
裸線２およびこれにつながる被覆を口する光ファイバ心
線ｌが、前記両金属パイプ１１の中心軸線上にあり、光
ファイバ心線１の余部は金型１３の外に延びるように、
金型面に配置するとともに、第１図においてつば部ＩＱ
となる畠ζ分に長さ方向の孔部９を設けるため、対応金
型面部分に金属パイプ１１と並行に、成形用連結ピン１
５を配置し、金型締めを行い、モールド樹脂８、例えば
エポキ７樹脂により一括成形する。The optical fiber core 1 with the optical fiber pan east wire 2 exposed by removing the coating is passed through two metal pipes 11, and between the two metal pipes 11, for example, two bare wires 2,
With one or more fixing members 14 interposed and the end faces of both metal pipes II joined to the +lii fixing member 14, the optical fiber core l connecting the bare wire 2 and the coating connected thereto is attached to the two It is on the central axis of the metal pipe 11, and the remaining part of the optical fiber core 1 extends outside the mold 13.
In addition to placing it on the mold surface, the collar IQ in Fig.
In order to provide a longitudinal hole 9 in the field ζ, a connecting pin 1 for forming is inserted parallel to the metal pipe 11 on the corresponding mold surface.
5 is placed, the mold is tightened, and the molding resin 8, for example, epoxy resin 7, is used for batch molding.

これによって、第１図に示すようなつば部ＩＯに金属パ
イプ１１が一体となり、同時につば部ＩＯに孔部９を仔
し、金属バイブ１１内が、つば部１０と同様モールド樹
脂８で充Ｉ０され、全体（成形用連結ピノ１５を含む）
が一体となった２個の、光ファイバ心線を備えるフェル
ールの一括成形体が得られる。As a result, the metal pipe 11 is integrated with the collar IO as shown in FIG. and the whole (including the connecting pinot 15 for molding)
A one-shot molded body of two ferrules including optical fiber cores is obtained.

その後一括成形体を金型１３から取り出し、成形用連結
ピン１５を引き抜き、被覆除去部、すなわち一括成形体
の中央ｍ＜で、切断等により分割し、裸線２の端面を研
磨する。Thereafter, the mass molded body is taken out from the mold 13, the forming connecting pin 15 is pulled out, and the end face of the bare wire 2 is polished by cutting or the like at the coating removal portion, that is, at the center m< of the mass molded body.

これによって光接続に用いられる一対のフェルールが同
時に作られる。In this way, a pair of ferrules used for optical connections are simultaneously made.

ｌ］ｉｉ記製造工程においては、被覆を有する光ファイ
バ心線１の被覆を一部除去し、露出させた裸線２を備え
るものについての実施について説明したが、取扱い上、
第４図に示すように、一端の被覆を除去し、裸線２を露
出させた二本の光ファイバ１の裸線２の部分を融着した
融召接続点ＩＧを有する光ファイバ心線１を使用しても
よい。l] In the manufacturing process described in ii, a case has been described in which the coating of the coated optical fiber core 1 is partially removed and the bare wire 2 is exposed.
As shown in FIG. 4, an optical fiber core 1 has a fusion splice point IG in which the bare wires 2 of two optical fibers 1 are fused together by removing the coating at one end and exposing the bare wires 2. may be used.

また第５図（イ）、（ロ）に示すように金属パイプ１１
の一部、・例えば内面または内外面に凹凸またはねじを
付けた凹曲部を佇する金属パイプを用いれば、モールド
樹脂８とのｔＭ　Ｚｒ而面を増大し、モールド樹脂８と
金属パイプ１！の剥離を防止することができる。In addition, as shown in FIGS. 5(a) and 5(b), the metal pipe 11
For example, if a metal pipe with an uneven or threaded concave portion on its inner or outer surface is used, the tM Zr relationship between the mold resin 8 and the metal pipe 1 can be increased, and the mold resin 8 and metal pipe 1! peeling can be prevented.

以上は単心の光ファイバ心線を対象としたものであるが
、本発明は第６．７図に示すように多心の光ファイバ心
線に適用できることはいうまでもない。図はともに正面
図である。第６図に示すＳ心の場合、一部被覆を除去し
た光ファイバ心線１を前述の金型１３と同様な金型を用
い、金属パイプ！Ｉに挿通させ、整列させ、モールド樹
脂８により一括成形すればよい。これによってでき」二
ったフェルールには回転方向位置決め川の孔部９が設け
られている。Although the above description is directed to a single-core optical fiber, it goes without saying that the present invention can be applied to a multi-core optical fiber as shown in FIG. 6.7. Both figures are front views. In the case of the S core shown in FIG. 6, the optical fiber core 1 with the coating partially removed is molded into a metal pipe using a mold similar to the mold 13 described above. They may be inserted through I, aligned, and collectively molded using mold resin 8. The resulting ferrule is provided with a hole 9 for rotational positioning.

上記第３図による本発明の実施については、つば部ＩＯ
と一体に成形される金属パイプ１１を二本使用して、成
形するものについて説明したが、一部の被覆を除去し、
裸線２を露出させた光ファイバ心線ｌを一本の適当長さ
の金属パイプ１１に挿通させ、前記光ファイバ心線１を
金属パイプ１１の中心軸線に沿う方向に支持した状態で
、モールド樹脂８によって成形してもよい。この場合、
多心のものに同様適用できることはいうまでもない。Regarding the implementation of the present invention according to FIG. 3 above, the collar part IO
Although we have explained the molding using two metal pipes 11 that are integrally molded with the
The coated optical fiber l with the bare wire 2 exposed is inserted into a metal pipe 11 of an appropriate length, and with the coated optical fiber 1 supported in a direction along the central axis of the metal pipe 11, the coated optical fiber 1 is molded. It may also be molded using resin 8. in this case,
Needless to say, this can be similarly applied to multi-centered objects.

このようにして成形された□−一括成形体１）；ｉ記金
属パイプのあ分で切断により分割し、切断による金属パ
イプの端面の加工を行い、光ファイバＰＩｌｔ＋ａの端
面をも仕上げて、光接続面を作る。□-Bulk molded body 1) formed in this way: The metal pipe described in i is divided by cutting, the end face of the metal pipe is processed by cutting, and the end face of the optical fiber PIlt+a is also finished. Create a connecting surface.

この場合もでき上った、光ファイバを備えるフェルール
の接続位置（回転方向）を精確に合わすように、各フェ
ルールのつば部に、ピンを嵌合させる孔部が成形時に設
けられることには変りはない。In this case as well, in order to accurately match the connection position (rotation direction) of the completed ferrule with the optical fiber, a hole into which the pin fits is provided in the collar of each ferrule during molding. There isn't.

次に本発明によるフェルールの一例の寸法・形状につい
て説明する。その形状は大略１図に示すとおりであるが
、フェルールのスリーブそう入部の外径は２．５ｗｎφ
、フェルールのっぽ部は角形として構成され、つば部厚
みは６−■あり、孔部の径はｌ■嘗φである。また内面
ねじを設けた金属パイプがフェルールのスリーブへのそ
う入部をなしており、フェルール端面からはモールド樹
ＩＩ！ｆｆ部分が突き出した形状となっている。このフ
ェルールのスリーブ嵌合部長さは約８龍である。なおつ
ば部寸法は約［ｉ、５ｓｓＸ４．５−霞である。またフ
エ！レール全１９はＩ８龍である。Next, the dimensions and shape of an example of the ferrule according to the present invention will be explained. Its shape is roughly as shown in Figure 1, and the outer diameter of the sleeve insertion part of the ferrule is 2.5wnφ.
The tail of the ferrule is configured as a square, the thickness of the flange is 6 mm, and the diameter of the hole is 1 mm. In addition, a metal pipe with an internal thread forms the entry part into the ferrule sleeve, and from the end of the ferrule, the mold tree II! The ff portion has a protruding shape. The length of the sleeve fitting part of this ferrule is approximately 8 mm. Note that the dimensions of the brim portion are approximately [i, 5ssX4.5-haze. Hue again! All 19 rails are I8 Dragon.

製造に当っては、シングルモードファイバ心線を光モニ
ターしながら、第４図により説明した融着接続したもの
を使用した。このときの融４０スは平均０．０４ｄＢで
ある。また被覆を除去した裸線部分の長さは約ＩＯ■−
である。光ファイバ心線には、すでに説明したように、
あらかじめ金属パイプを通しておき、金型にそれぞれセ
ットし、成形用連結ピンも同時にセットした。During manufacture, the single mode fiber core wire was fusion spliced as explained in FIG. 4 while being optically monitored. The average fusion rate at this time is 0.04 dB. Also, the length of the bare wire part with the covering removed is approximately IO■-
It is. As already explained, optical fiber cores include
The metal pipes were passed through them in advance, and each was set in the mold, and the connecting pin for molding was also set at the same time.

その後、金型締めをおこない、低圧成形可能なエポキシ
樹脂により一括成形した。成形圧ｚｏｈｇ／ｅｌｌ”で
成形温度１７０℃、成形時間５分で完了する。After that, the mold was tightened and molded all at once using an epoxy resin that can be molded under low pressure. The molding process is completed in 5 minutes at a molding pressure of 170° C. and a molding pressure of 100 g/ell.

その後、金型から一括成形体を取り出し、成形用連結ピ
ンを引き抜き、フェルール成形中央部、すなわち、Ｆｓ
Ｉｉ！の融着接続部をはさみ込む形で２ケ所切断した後
、得られたフェルールの両端面の光ファイバ裸線の端面
をそれぞれ研ａした。前記連結ピンは実際の光接続の際
に使用される連結用ピンより成形収縮率を考慮して、若
干大き目のものを使用している。得られたフェルールを
スリーブおよび連結用ピンを用いて結合させたときの結
合損失は総数２０試料の平均で００ｓ）ｄＢ、最大０．
８７ｄＢであった。After that, take out the molded body from the mold, pull out the connecting pin for molding, and press the central part of the ferrule molding, that is, Fs.
Ii! After cutting the ferrule at two places by sandwiching the fusion spliced portion, the end faces of the bare optical fibers on both end faces of the obtained ferrule were polished. The connecting pins are slightly larger than the connecting pins used in actual optical connections, taking into consideration the molding shrinkage rate. When the obtained ferrules were coupled using a sleeve and a connecting pin, the coupling loss was an average of 00s) dB for a total of 20 samples, and a maximum of 0.
It was 87dB.

この値は通常のマルチモードファイバコネクタと比較し
てもほぼ同程度であり、十分実用に供することができる
ものと理解されよう。なおスリーブとしては割りスリー
ブを使用したが、割のはいっていない精密スリーブを用
いることができる。This value is almost the same as that of a normal multimode fiber connector, and it can be understood that it can be put to practical use. Although a split sleeve is used as the sleeve, a precision sleeve without splits can be used.

またすでに述べたように、被覆除去部（？！！線の部分
）の構成として融着接続を利用したが、被覆の一部を除
去したものでもよい。Further, as already mentioned, although fusion splicing is used to construct the sheath removal portion (the wire portion), it is also possible to remove a portion of the sheath.

以上上としてシングルモードファイバラ用いた実施につ
いて説明したが、その他マルチモードファイバやすでに
若干触れた多心光ファイバ用のコネクタにも適用できる
ことは明らかである。Although the above description has been made of implementation using a single mode fiber optic, it is clear that the present invention can also be applied to connectors for other multimode fibers and multi-core optical fibers, which have already been briefly mentioned.

［効果］ 以上説明したように、本発明では金属パイプに光ファイ
バ心線を挿通させ、光ファイバを共通とし、成形用連結
ピンを予め配して、一括成形体を作り、これをそれぞれ
光ファイバを備えた７エルールに切断０分割して一対の
７エルールを作うているので、前記フェルールをスリー
ブに嵌め、フェルールの孔ａｌｓＬ１に連結用ピンを通
せば、光ファイバを共通とした成形時とかわらぬ位置で
、光ファイバのコア部の精確な接合が可能となる。従っ
て従来のようなコア部を中心とするフェルール外径の研
削加工等を必要としなくなる。[Effect] As explained above, in the present invention, an optical fiber core wire is inserted into a metal pipe, a common optical fiber is used, and connecting pins for molding are arranged in advance to create a collective molded body, and each of the optical fibers is Since a pair of 7 errules are made by cutting and dividing into 7 errules with It is possible to precisely join the core portions of optical fibers at the same position. Therefore, it is no longer necessary to grind the outer diameter of the ferrule centering on the core part as in the conventional method.

また高精度が要求される光ファイバを備えたフェルール
を一対まとめて容易に樹脂成形によって制作することが
可能となるが、成形時間も短かい時間で完了し、著しく
生産性が向上するとともに、低価格化の光コネクタが実
現する。In addition, it is possible to easily produce pairs of ferrules with optical fibers that require high precision by resin molding, and the molding time can be completed in a short time, significantly improving productivity and reducing costs. Affordable optical connectors will become a reality.

またフェルールの形状としても、外周に金属パイプを何
しているため、外径の歩留り（外径の不揃）が全体樹脂
モールドフェルールより著しく向上するとともに、フェ
ルールの曲げ強度も向上し、平均８　ｋｇ以上確保でき
、金属パイプで形成されているため、脱む時の耐摩耗性
が殴れており、１０００回脱青においても変動が±０．
２ｄＢ以下と、ンングルモードファイバコネクタとして
の結合再現性としては非常に優れた結果を得た。In addition, since the ferrule is shaped like a metal pipe on the outer periphery, the yield rate of the outer diameter (irregularity of outer diameter) is significantly improved compared to the entire resin molded ferrule, and the bending strength of the ferrule is also improved, with an average of 8. Since it is made of metal pipe, it has excellent abrasion resistance when removed, and even after removing it 1000 times, the variation is ±0.
The coupling reproducibility as a single mode fiber connector was 2 dB or less, which is an extremely excellent result.

光ファイバ心線を敵前接続し、−期成形（位置決め）し
た後、−結成形体を切断する工程においては、裸線固定
用部材を用いることにより、この位置に裸線の融着接続
部をセットすれば、これにより金属パイプ間の寸法を規
定し、成形後の切断により、かならず融？を接続部が除
去でき、フェルールに残存しない利点がある。After splicing the optical fibers and forming (positioning) them, in the process of cutting the formed body, the bare wire fixing member is used to set the bare wire fusion splice at this position. This allows you to define the dimensions between the metal pipes and ensure that they are melted by cutting after forming. This has the advantage that the connection part can be removed and does not remain on the ferrule.

二本の金属パイプを用いず一本の金属パイプを用いて一
括成形体を作れば、成型時の金型へのセットが容易とな
る。光ファイバ裸線を共通として一本の金属パイプ使用
により一括成形体を作り、これを光ファイバ裸線を共通
とする部分で切断しても金属パイプを二本使用したもの
と同効の一対のフェルールが得られることはいうまでも
ない。If a single metal pipe is used instead of two metal pipes to make a batch molded product, it will be easier to set it in a mold during molding. Even if you make a bulk molded body using one metal pipe with the bare optical fibers in common, and cut it at the part where the bare optical fibers are in common, a pair of metal pipes with the same effect as two metal pipes can be produced. Needless to say, a ferrule can be obtained.

【図面の簡単な説明】[Brief explanation of drawings]

第１図（イ）、（ロ）は本発明の光コネクタの一実施例
夕の加圧固定の一例゛を示す。 第３図は本発明の光ファイバ心線を備えるフェルールの
製造説明図である。 第４図は光ファイバ心線の被覆を除去した裸線面を形成
したものの一例を示す。 第６図、第７図は多心光ファイバ心線による本発明の実
施例を正面図で示す。 第８図は従来のメタルフェルールの一例を長さ方向断面
図で示す。 １・・・光ファイバ心線（被覆部）、２・・・光ファイ
バＷｉＱ（ガラス沈）、６・・・連結用ピン、７・・・
スリーブ、８・・・モールド樹脂、９・・・孔部、！０
・・・つば部、１１・・・会頭パイプ、　１２・・・固
定用ハウジング、１３・・・金型、　＋４・・・光ファ
イバ裸線固定用部材、１５・・・成形用連結ピン、・１
６・・・融着接続点。 大２図 實３図 π４図FIGS. 1A and 1B show an example of an embodiment of the optical connector according to the present invention, which is fixed under pressure. FIG. 3 is an explanatory diagram of manufacturing a ferrule provided with the optical fiber core of the present invention. FIG. 4 shows an example of a coated optical fiber having a bare wire surface formed by removing the coating. FIGS. 6 and 7 show front views of embodiments of the present invention using multi-core optical fibers. FIG. 8 shows an example of a conventional metal ferrule in a longitudinal sectional view. DESCRIPTION OF SYMBOLS 1... Optical fiber core wire (coated part), 2... Optical fiber WiQ (glass precipitated), 6... Connecting pin, 7...
Sleeve, 8...mold resin, 9...hole,! 0
...Brim portion, 11...Front pipe, 12...Fixing housing, 13...Mold, +4...Member for fixing bare optical fiber, 15...Connecting pin for molding,・1
6... Fusion splicing point. Large 2 diagrams, 3 diagrams, π 4 diagrams

Claims (7)

【特許請求の範囲】[Claims] （１）一部被覆を除去して裸線とした光ファイバ心線を
挿通させた金属パイプと成形用連結ピンとを金型にセッ
トし、モールド樹脂成形により形成した一括成形体を分
割した、光ファイバ心線を備える一対のフェルールの金
属パイプをスリーブに通して嵌合させ、前記成形用連結
ピンによって、フェルールつば部に形成された孔部に連
結用ピンを通し、前記嵌合されたフェルールの軸方向に
加圧するハウジング部材で結合することを特徴とする光
コネクタ。(1) A metal pipe into which a bare optical fiber core wire with a part of the coating has been removed and a connecting pin for molding are set in a mold, and a lump molded body formed by resin molding is divided. The metal pipes of a pair of ferrules each having a fiber core wire are passed through the sleeve and fitted together, and the connecting pin is passed through the hole formed in the ferrule collar using the forming connecting pin, and the fitted ferrule is inserted into the sleeve. An optical connector characterized by being connected by a housing member that applies pressure in the axial direction. （２）金属パイプの内外面が一部凹凸面をなすことを特
徴とする特許請求の範囲第１項記載の光コネクタ。(2) The optical connector according to claim 1, wherein the inner and outer surfaces of the metal pipe are partially uneven. （３）一部被覆を除去して裸線とした光ファイバ心線を
金属パイプに挿通させ、前記金属パイプを金型に配置し
、前記光ファイバ心線の余部は金型外に出るように配置
するとともに、前記金属パイプと並行に成形用連結ピン
を配置し、モールド樹脂によって金属パイプ内が前記モ
ールド樹脂によって充填され、二つのつば部と前記金属
パイプと光ファイバ心線および成形用連結ピンよりなる
一括成形体となし、該成形体を金型より取り出し、つば
部より前記成形用連結ピンを引き抜き、前記金属パイプ
の中央部で分割を行って、一対の光ファイバ心線を備え
るフェルールとなすことを特徴とする光コネクタ用フェ
ルールの製造方法。(3) Insert the optical fiber core wire into a bare wire by removing a part of the coating into a metal pipe, place the metal pipe in a mold, and make sure that the remaining part of the optical fiber core wire comes out of the mold. At the same time, a connecting pin for molding is placed in parallel with the metal pipe, and the inside of the metal pipe is filled with the molding resin, and the two flange parts, the metal pipe, the optical fiber core, and the connecting pin for molding are placed in parallel with the metal pipe. Take out the molded body from the mold, pull out the connecting pin for molding from the flange, and divide the metal pipe at the center to form a ferrule with a pair of optical fiber cores. A method for manufacturing a ferrule for an optical connector, characterized by: （４）二本の金属パイプを用いることを特徴とする特許
請求の範囲第３項記載の光コネクタ用フェルールの製造
方法。(4) The method for manufacturing a ferrule for an optical connector according to claim 3, characterized in that two metal pipes are used. （５）一本の金属パイプを用いることを特徴とする特許
請求の範囲第３項記載の光コネクタ用フェルールの製造
方法。(5) The method for manufacturing a ferrule for an optical connector according to claim 3, characterized in that a single metal pipe is used. （６）金属パイプ内に挿通させる光ファイバ心線に、予
め一端の被覆を除去した二本の光ファイバ心線の裸線端
部を融着接続したものを用いることを特徴とする特許請
求の範囲第３〜第５項記載の光コネクタ用フェルールの
製造方法。(6) A patent claim characterized in that the optical fiber core wire to be inserted into the metal pipe is obtained by fusion splicing the bare ends of two optical fiber core wires, one end of which has been previously uncoated. A method for manufacturing a ferrule for an optical connector according to items 3 to 5. （７）多心光ファイバ心線を金属パイプに挿通させるこ
とを特徴とする特許請求の範囲第６項記載の光コネクタ
用フェルールの製造方法。(7) A method for manufacturing a ferrule for an optical connector according to claim 6, which comprises inserting a multi-core optical fiber core through a metal pipe.
JP18613584A 1984-09-04 1984-09-04 Production of optical connector and ferrule for optical connector Granted JPS6163805A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
JP18613584A JPS6163805A (en) 1984-09-04 1984-09-04 Production of optical connector and ferrule for optical connector
AU46985/85A AU572342B2 (en) 1984-09-04 1985-09-03 Optical connector
CA000489918A CA1270682A (en) 1984-09-04 1985-09-03 Optical connector and method of manufacturing a pair of ferrules therefor
US06/788,404 US4708433A (en) 1984-09-04 1985-09-04 Optical connector and method of manufacturing a pair of ferrules therefor
DE8585111146T DE3582102D1 (en) 1984-09-04 1985-09-04 OPTICAL CONNECTOR AND METHOD FOR PRODUCING A PAIR OF PAIRS FOR THIS.
EP85111146A EP0174013B1 (en) 1984-09-04 1985-09-04 Optical connector and method of manufacturing a pair of ferrules therefor
AU12500/88A AU586946B2 (en) 1984-09-04 1988-02-29 A method of manufacturing a pair of ferrules for an optical connector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18613584A JPS6163805A (en) 1984-09-04 1984-09-04 Production of optical connector and ferrule for optical connector

Publications (2)

Publication Number Publication Date
JPS6163805A true JPS6163805A (en) 1986-04-02
JPH0536762B2 JPH0536762B2 (en) 1993-05-31

Family

ID=16182982

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18613584A Granted JPS6163805A (en) 1984-09-04 1984-09-04 Production of optical connector and ferrule for optical connector

Country Status (1)

Country Link
JP (1) JPS6163805A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61155807U (en) * 1984-11-21 1986-09-27
JPH0335204A (en) * 1989-06-30 1991-02-15 Tokai Rubber Ind Ltd Production of connector for optical fiber

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61155807U (en) * 1984-11-21 1986-09-27
JPS6312323Y2 (en) * 1984-11-21 1988-04-08
JPH0335204A (en) * 1989-06-30 1991-02-15 Tokai Rubber Ind Ltd Production of connector for optical fiber

Also Published As

Publication number Publication date
JPH0536762B2 (en) 1993-05-31

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