JPH0534549A - Optical connector - Google Patents

Optical connector

Info

Publication number
JPH0534549A
JPH0534549A JP20993691A JP20993691A JPH0534549A JP H0534549 A JPH0534549 A JP H0534549A JP 20993691 A JP20993691 A JP 20993691A JP 20993691 A JP20993691 A JP 20993691A JP H0534549 A JPH0534549 A JP H0534549A
Authority
JP
Japan
Prior art keywords
sleeve
optical connector
housing
rotation
rotation stopper
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.)
Pending
Application number
JP20993691A
Other languages
Japanese (ja)
Inventor
Shinji Ishikawa
真二 石川
Muneaki Ueki
宗昭 植木
Shunichi Mizuno
俊一 水野
Tsuguji Kashihara
告司 樫原
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.)
Sumitomo Electric Industries Ltd
Original Assignee
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 Sumitomo Electric Industries Ltd filed Critical Sumitomo Electric Industries Ltd
Priority to JP20993691A priority Critical patent/JPH0534549A/en
Publication of JPH0534549A publication Critical patent/JPH0534549A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To provide the optical connector which maintains the specified positional relation between a sleeve for connection and an optical connector ferrule and decreases the fluctuation in the loss by repetitive attaching and detaching. CONSTITUTION:This optical connector consists of the sleeve 1 having a round shape. This sleeve is axially provided with a slit 11. The stopper for rotation of the sleeve 1 having a projection 31 fitting into the slit 11 of the sleeve 1 is provided in the housing which holds the sleeve 1.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は光ファイバを位置決め固
定した光コネクタフェルールを接続用スリーブの両端よ
り挿入して光結合を実現する光コネクタに関するもので
ある。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical connector in which an optical connector ferrule having an optical fiber positioned and fixed is inserted from both ends of a connecting sleeve to realize optical coupling.

【0002】[0002]

【従来の技術及び発明が解決しようとする課題】従来の
光コネクタの接続構造は、円筒型で軸方向1本の貫通し
たスリ割りを有する接続用スリーブが用いられる。この
スリーブはハウジングに入っており、ハウジング内での
遊びがあるため、ハウジング内で可動である。従って、
スリーブの方向性は定っておらず、コネクタ結合の際の
光コネクタフェルールに対する光コネクタの方向性は不
定で、スリーブ長手方向の非円変動により光コネクタフ
ェルール同士の位置関係が変わり、繰返し着脱等による
損失変動が生じ易いという問題がある。
2. Description of the Related Art A conventional connecting structure for an optical connector uses a connecting sleeve having a cylindrical shape and one slit in the axial direction. The sleeve is encased in the housing and is movable within the housing due to the play within the housing. Therefore,
The directionality of the sleeve is not fixed, and the directionality of the optical connector with respect to the optical connector ferrule at the time of connector coupling is not fixed, the positional relationship between the optical connector ferrules changes due to non-circular fluctuations in the sleeve longitudinal direction, and repeated attachment / detachment, etc. There is a problem that loss fluctuation due to

【0003】上述の問題点を解消し、光コネクタフェル
ールとスリーブの位置関係を明確にするための手段とし
て、例えば特開昭 59-204814号に示されるように、三角
形のバネ性を有するスリーブを用い、光コネクタフェル
ールのスリーブに対する接触部を一定化する方法が提案
されている。しかし、このような三角形状のスリーブは
金属材料では可能であるが、例えばセラミックスのよう
な硬脆材料では、角度への応力集中が起こり易く実現困
難である。
As a means for solving the above-mentioned problems and clarifying the positional relationship between the optical connector ferrule and the sleeve, for example, as shown in JP-A-59-204814, a sleeve having a triangular spring property is used. A method has been proposed in which the contact portion of the optical connector ferrule with respect to the sleeve is made constant by using it. However, such a triangular sleeve is possible with a metal material, but with a hard and brittle material such as ceramics, stress concentration easily occurs at an angle, which is difficult to realize.

【0004】[0004]

【課題を解決するための手段】本願発明は上述の問題点
を解消し、接続用スリーブと光コネクタフェルールの方
向性を常に一定に保ち得る光コネクタを提供するもの
で、その特徴は、スリーブが真円形状でかつ軸方向にス
リ割りが設けられており、上記スリーブを保持するハウ
ジング内にスリーブのスリ割りに嵌合する突起を有する
スリーブの回転止めが設けられていることにある。
SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems and provides an optical connector capable of keeping the directivity of a connecting sleeve and an optical connector ferrule constant at all times. The slit is provided in the shape of a perfect circle and is provided in the axial direction, and the rotation stopper for the sleeve having a projection that fits in the slit of the sleeve is provided in the housing that holds the sleeve.

【0005】[0005]

【実施例】図1は本発明の光コネクタの具体例の要部の
斜視図である。図面において、1は光コネクタフェルー
ルを挿入し、結合を実現する接続用のスリーブで、軸方
向に1本のスリ割り11が設けられている。2は前記スリ
ーブ1を保持するハウジングで、その内部にスリーブの
回転止め3が設けられている。該回転止め3には突起31
があり、該突起31とスリーブ1のスリ割り11とが嵌合す
ることによって、スリーブ1の回転がとめられる。
DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a perspective view of the essential parts of a specific example of the optical connector of the present invention. In the drawing, reference numeral 1 denotes a connecting sleeve for inserting an optical connector ferrule and realizing coupling, and one slot 11 is provided in the axial direction. A housing 2 holds the sleeve 1, and a sleeve rotation stopper 3 is provided therein. A protrusion 31 is provided on the rotation stopper 3.
When the protrusion 31 and the slit 11 of the sleeve 1 are fitted to each other, the rotation of the sleeve 1 is stopped.

【0006】図5(イ)〜(ニ)は回転止め3の形状例
を示す。その形状は回転防止の効果があれば特に限定さ
れるものではなく、図5(イ)及び(ロ)に示す4角形
以外の多角形状、例えば図5(ハ)のような3角形状、
あるいは図5(ニ)のような6角形状であってもよく、
又強度を増すため柱状のものであってもかまわない。回
転止め3の材質としては、金属、セラミックス、プラス
チックがあり、又それらの複合であってもよい。又回転
止めの摩耗を減少させるため、表面の研磨加工(バレル
研磨、電解研磨等)あるいはコーティングを施してもよ
い。ハウジング2全体はコネクタ用アダプタ(図示せ
ず)内に入っており、所望の接続構造(例えはネジ止め
式プラグ、ツメ止め式プラグ)をとることが出来る。
FIGS. 5A to 5D show examples of the shape of the rotation stopper 3. The shape is not particularly limited as long as it has an effect of preventing rotation. For example, a polygonal shape other than the quadrangular shape shown in FIGS. 5A and 5B, for example, a triangular shape as shown in FIG.
Alternatively, it may have a hexagonal shape as shown in FIG.
Further, it may have a columnar shape in order to increase the strength. As the material of the rotation stopper 3, there are metals, ceramics, plastics, or a combination thereof. Further, in order to reduce the wear of the rotation stopper, the surface may be polished (barrel polishing, electrolytic polishing, etc.) or coated. The entire housing 2 is contained in a connector adapter (not shown), and a desired connection structure (for example, a screw-fastening type plug or a claw-fastening type plug) can be taken.

【0007】[0007]

【作用】上述のように、本発明の光コネクタは、光コネ
クタフェルールの軸心出しを行なうスリーブのスリ割り
に回転止めの突起が嵌合されるものである。回転止めは
これを設置するハウジング内で動くことが出来るが、そ
の可動の範囲は左右、上下方向については、ハウジング
内での遊びの範囲内にあり、回転方向には、回転止めの
幅及び高さをそれぞれl1、l2、ハウジングの回転止め収
納溝の高さをRとすると、回転可能な角度△θは次の式
のように示される。
As described above, in the optical connector of the present invention, the projection for preventing rotation is fitted in the slit of the sleeve for centering the optical connector ferrule. The detent can move within the housing in which it is installed, but its range of movement is within the play within the housing in the left-right and up-down directions. Assuming that the heights are l 1 and l 2 , respectively, and the height of the rotation stop housing groove of the housing is R, the rotatable angle Δθ is expressed by the following equation.

【0008】[0008]

【数1】 [Equation 1]

【0009】上式から割りスリーブの回転を少なくする
には、回転止めの対角線長Lとハウジングの溝の高さR
とが次式の関係にあればよいことがわかる。
From the above equation, in order to reduce the rotation of the split sleeve, the diagonal length L of the rotation stopper and the height R of the groove of the housing are set.
It can be seen that it suffices that and have the relationship of

【0010】[0010]

【数2】 [Equation 2]

【0011】ここで、l2=4.0 、R=4.4 とした場合、
回転止めの幅l1が4.7 以上となれば、スリーブの最大回
転角度を10°以下にすることが出来る。
Here, when l 2 = 4.0 and R = 4.4,
If the width l 1 of the rotation stopper is 4.7 or more, the maximum rotation angle of the sleeve can be 10 ° or less.

【0012】もしも、ハウジング遊びが少ない場合は、
光コネクタフェルール挿入時のズレ等により、回転止め
が固定状態となり得る。この際、ハウジング部と割りス
リーブないし、回転止めの間がすり合うことになり、ダ
ストの発生等、損失上好ましくない状況が起こり得る。
そのため、ハウジングと回転止めの間の遊びは光コネク
タの製造上の公差(0.1 〜0.2mm )を許容出来るもので
あることが必要となる。
If there is little housing play,
The rotation stopper may be fixed due to misalignment when the optical connector ferrule is inserted. At this time, the housing portion and the split sleeve or the rotation stopper are rubbed with each other, which may cause an undesirable situation such as generation of dust.
Therefore, it is necessary that the play between the housing and the rotation stopper be tolerant to the manufacturing tolerance (0.1 to 0.2 mm) of the optical connector.

【0013】以上のような構成により、光コネクタ接続
の繰返しの際のスリーブ回転方向にかかる力によるスリ
ーブの回転を、数1に示される範囲に規制することが可
能となり、スリーブと光コネクタフェルールの位置関係
を一定に保つことが出来る。
With the above-described structure, the rotation of the sleeve due to the force applied in the sleeve rotation direction when the optical connector is repeatedly connected can be restricted to the range shown by the formula 1, and the sleeve and the optical connector ferrule can be controlled. The positional relationship can be kept constant.

【0014】[0014]

【実験例】(1) 割りスリーブの割り方向を変えた場合の
接続損失特性を従来形光コネクタ構造で測定した結果、
図2に示すように、割りスリーブ角度θに対し、接続損
失は平均0.35dBであった。
[Experimental example] (1) As a result of measuring the connection loss characteristics when changing the splitting direction of the split sleeve with the conventional optical connector structure,
As shown in FIG. 2, the connection loss was 0.35 dB on average with respect to the split sleeve angle θ.

【0015】(2) プラグイン形光コネクタを用い、ハウ
ジングに回転止めを設けた本発明の場合の繰り返し着脱
損失特性を測定した結果、図3に示すように、1000回の
繰り返し着脱による損失変動は0.05dBと良好な特性を示
した。
(2) Using the plug-in type optical connector, the result of repeated insertion / removal loss characteristics in the case of the present invention in which the housing is provided with a rotation stopper, as shown in FIG. Has a good characteristic of 0.05 dB.

【0016】(3) 比較のために、プラグイン形光コネク
タを用い、従来形光コネクタと上記(2) と同一フェルー
ル、スリーブを用いて繰り返し着脱損失特性を測定した
結果、図4に示すように、1000回の繰り返し着脱による
損失変動は0.32dBであった。又この時、初期と終了時
で、スリーブのスリ割りの位置は 180°回転していた。
(3) For comparison, the plug-in type optical connector is used, and the result of repeatedly measuring the attachment / detachment loss characteristics using the conventional type optical connector and the same ferrule and sleeve as in (2) above is shown in FIG. In addition, the loss fluctuation due to 1000 cycles of attachment and detachment was 0.32 dB. At this time, the slitting position of the sleeve was rotated 180 ° at the beginning and the end.

【0017】[0017]

【発明の効果】以上説明したように、本発明の光コネク
タによれば、スリーブの回転をハウジング内に設けた回
転止めにより防止することで、スリーブと光コネクタフ
ェルールの位置関係を一定に保つことができ、光コネク
タの繰り返し着脱による損失変動を著しく低減すること
が可能となった。
As described above, according to the optical connector of the present invention, the rotation of the sleeve is prevented by the rotation stopper provided in the housing, so that the positional relationship between the sleeve and the optical connector ferrule is kept constant. As a result, it is possible to significantly reduce the loss fluctuation due to repeated attachment and detachment of the optical connector.

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

【図1】本発明の光コネクタの具体例の要部の斜視図で
ある。
FIG. 1 is a perspective view of a main part of a specific example of an optical connector of the present invention.

【図2】割りスリーブの角度を変えた場合の割りスリー
ブ角度と接続損失の関係特性図である。
FIG. 2 is a characteristic diagram showing the relationship between the split sleeve angle and the connection loss when the split sleeve angle is changed.

【図3】本発明の光コネクタの繰り返し着脱における損
失変動特性図である。
FIG. 3 is a loss variation characteristic diagram when the optical connector of the present invention is repeatedly attached and detached.

【図4】従来形光コネクタの繰り返し着脱における損失
変動特性図である。
FIG. 4 is a loss variation characteristic diagram in repeated attachment / detachment of a conventional optical connector.

【図5】図5(イ)〜(ニ)はいずれも回転止めの形状
例である。
5A to 5D are all examples of the shape of the rotation stopper.

【符号の説明】[Explanation of symbols]

1 スリーブ 11 スリ割り 2 ハウジング 3 回転止め 31 突起 1 sleeve 11 pickpocket 2 housing 3 rotation stop 31 protrusion

───────────────────────────────────────────────────── フロントページの続き (72)発明者 樫原 告司 神奈川県横浜市栄区田谷町1番地 住友電 気工業株式会社横浜製作所内   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Koji Kashihara             Sumitomoden 1 Taya-cho, Sakae-ku, Yokohama-shi, Kanagawa             Ki Industry Co., Ltd. Yokohama Works

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 光ファイバを位置決め固定した光コネク
タフェルールを互いに向き合せて接続用スリーブの両端
より挿入して光結合を実現する光コネクタにおいて、前
記スリーブが真円形状で、かつ軸方向にスリ割りが設け
られており、上記スリーブを保持するハウジング内に、
スリーブのスリ割りに嵌合する突起を有するスリーブの
回転止めが設けられていることを特徴とする光コネク
タ。
1. An optical connector in which optical connector ferrules having optical fibers positioned and fixed are faced to each other and inserted from both ends of a connecting sleeve to realize optical coupling, and the sleeve has a perfect circular shape and is axially slippery. A split is provided in the housing that holds the sleeve,
An optical connector, comprising: a sleeve rotation stopper having a protrusion that fits into a sleeve slit.
【請求項2】 スリーブの回転止めがハウジング内で可
動であることを特徴とする請求項1記載の光コネクタ。
2. The optical connector according to claim 1, wherein the rotation stopper of the sleeve is movable in the housing.
JP20993691A 1991-07-26 1991-07-26 Optical connector Pending JPH0534549A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20993691A JPH0534549A (en) 1991-07-26 1991-07-26 Optical connector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20993691A JPH0534549A (en) 1991-07-26 1991-07-26 Optical connector

Publications (1)

Publication Number Publication Date
JPH0534549A true JPH0534549A (en) 1993-02-12

Family

ID=16581115

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20993691A Pending JPH0534549A (en) 1991-07-26 1991-07-26 Optical connector

Country Status (1)

Country Link
JP (1) JPH0534549A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005338647A (en) * 2004-05-28 2005-12-08 Kyocera Corp Optical receptacle and method for measuring connection loss
EP1468318B1 (en) * 2002-01-24 2007-04-11 Hubert & Suhner AG Sleeve receiving element for the coupling of an optical plug-type connector

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1468318B1 (en) * 2002-01-24 2007-04-11 Hubert & Suhner AG Sleeve receiving element for the coupling of an optical plug-type connector
JP2005338647A (en) * 2004-05-28 2005-12-08 Kyocera Corp Optical receptacle and method for measuring connection loss

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