JPH01234807A - Optical connector - Google Patents
Optical connectorInfo
- Publication number
- JPH01234807A JPH01234807A JP6047488A JP6047488A JPH01234807A JP H01234807 A JPH01234807 A JP H01234807A JP 6047488 A JP6047488 A JP 6047488A JP 6047488 A JP6047488 A JP 6047488A JP H01234807 A JPH01234807 A JP H01234807A
- Authority
- JP
- Japan
- Prior art keywords
- ferrules
- ferrule
- key
- plug
- plug housings
- 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
Links
- 230000003287 optical effect Effects 0.000 title claims description 15
- 239000013307 optical fiber Substances 0.000 claims description 27
- 238000003825 pressing Methods 0.000 claims description 6
- 230000008033 biological extinction Effects 0.000 abstract description 10
- 230000006866 deterioration Effects 0.000 abstract 1
- 230000010287 polarization Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
Landscapes
- Mechanical Coupling Of Light Guides (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、光フアイバ相互間の接続において、特に偏波
保持光ファイバ等、軸回りの角度を合せる必要がある場
合に使用される光コネクタに関するものである。Detailed Description of the Invention (Industrial Application Field) The present invention relates to an optical connector used in connection between optical fibers, especially when it is necessary to match angles around the axis, such as polarization maintaining optical fibers. It is related to.
（従来の技術）
光フアイバ相互間の接続において、接続と切離しを容易
に行なうために用いられる光コネクタとしては種々の方
法を採用したものが知られており、その代表的なものと
して、例えば月Ｓ Ｃ５９７０に規定されているＦＯＩ
形単心光ファイバコネクタのように、光ファイバを円筒
棒状のフェルールの中心に固定し、これを精密な内径を
有する中空円筒状の整列スリーブ内に挿入してフェルー
ルの端面同士を突当てる方法がある。(Prior Art) Optical connectors employing various methods are known to be used to easily connect and disconnect optical fibers. FOI stipulated in SC5970
As with single-fiber optical fiber connectors, the optical fiber is fixed at the center of a cylindrical ferrule, inserted into a hollow cylindrical alignment sleeve with a precise inner diameter, and the end surfaces of the ferrules butt against each other. be.
このようなフェルールの構・造は、精密な外径を有し整
列スリーブに挿入される嵌挿部と、これをプラグハウジ
ング内に保持するためのフランジ部より構成され、通常
フェルールが回転しないように、位置決めのための係止
片であるキーがプラグハウジング内に設けられていると
ともに、前記フェルールのフランジ部に前記キーと係止
するキー溝が設けられており、プラグハウジングに対し
てフェルールにある程度の自由度を持った浮動構造を取
るよう、前記キー溝の幅を前記キーの幅よりも広くして
０，２■程度の隙間を形成し、フェルール相互の高精度
な接続が外力によって影響を受けないようになしてあっ
た。The structure of this type of ferrule consists of a fitting part that has a precise outer diameter and is inserted into the alignment sleeve, and a flange part that holds this part in the plug housing. A key, which is a locking piece for positioning, is provided in the plug housing, and a key groove that locks with the key is provided in the flange portion of the ferrule, so that the ferrule is attached to the plug housing. In order to obtain a floating structure with a certain degree of freedom, the width of the key groove is made wider than the width of the key to form a gap of about 0.2 mm, so that the high precision connection between the ferrules is not affected by external force. I had made sure not to receive any damage.
一方、光ファイバの中には伝搬する光の偏波状態を保存
できる偏波保持光ファイバがある。この偏波保持光ファ
イバは、主軸方向に直線偏波光を入射した場合、その偏
波状態を保持する特性を有し、その性能を評価するパラ
メータとして、主軸方向に直線偏波を入射したときの出
射側の光パワの主軸方向とその直角方向の成分の比であ
る消光比が用いられており、例えば、１０ｍ程度の短尺
な偏波保持光ファイバについては、消光比とじて（−）
４０〜（−）５０ｄＢが実現されている。またこのよう
な光フアイバ同士を接続する場合には、光ファイバの主
軸の向き、即ち光ファイバの狛回りの角度を合せる必要
があり、この回転方向の角度ずれに対する必要な精度と
しては、消光比（−）４０ｄＢ必要な場合で０．５″以
内、消光比（−）３０ｄＢ必要な場合で２″以内が要求
される。On the other hand, some optical fibers include polarization-maintaining optical fibers that can preserve the polarization state of propagating light. This polarization-maintaining optical fiber has the property of maintaining its polarization state when linearly polarized light is input in the direction of its main axis. The extinction ratio, which is the ratio of the optical power on the output side in the main axis direction and the component in the direction perpendicular to it, is used. For example, for a short polarization maintaining optical fiber of about 10 m, the extinction ratio is (-).
40 to (-)50 dB has been achieved. In addition, when connecting such optical fibers, it is necessary to match the direction of the main axis of the optical fiber, that is, the angle of the optical fiber's rotation, and the required accuracy for this angular deviation in the rotation direction is If (-) 40 dB is required, an extinction ratio of 0.5'' or less is required, and if (-) 30 dB is required, an extinction ratio of 2'' or less is required.
（発明が解決しようとする課８）
しかしながら、上記光コネクタによれば、フェルールの
フランジ部に設けたキー溝の幅をプラグハウジング内に
設けたキーの幅よりも広＜Ｌｏ、２１程度の隙間を形成
しであるので、フェルール相互間で５″程度の軸回りの
角度ずれが発生する恐れがあり、例えば、フェルールの
フランジ部の外径を４．６ｎｎとした場合、フェルール
の軸回りの角度ずれは最大で次式のように
ｔａｎ ” （０，２／２．３） 〜５゜となり、この
ときの消光比は次式のように１０１ｏｇ１０１ｏ ２（
５°））二２１ｄＢと劣化してしまい、消光比（−）３
０ｄＢ以上を実現することはできないという問題点があ
った。(Problem 8 to be solved by the invention) However, according to the optical connector, the width of the keyway provided in the flange of the ferrule is wider than the width of the key provided in the plug housing, and the gap is about 21. Since the ferrules are formed with The maximum deviation is tan '' (0,2/2.3) ~ 5° as shown in the following equation, and the extinction ratio at this time is 101og101o 2 (
5°)) 21 dB, and the extinction ratio (-)3
There was a problem in that it was not possible to achieve 0 dB or more.
本発明の目的は、上記問題点に鑑み、偏波保持光フアイ
バ相互間を接続する場合においても、消光比が劣化する
ことはなく、高精度で接続が行なえる優れた光コネクタ
を提供することにある。SUMMARY OF THE INVENTION In view of the above-mentioned problems, an object of the present invention is to provide an excellent optical connector that can connect polarization-maintaining optical fibers with high precision without deteriorating the extinction ratio even when connecting polarization-maintaining optical fibers. It is in.
（課題を解決するための手段）
本発明は上目的を達成するため、光ファイバの端部がそ
れぞれ固定される一対のフェルールと、前記一対のフェ
ルールが嵌挿され突合わされる整列スリーブと、前記各
フェルールに軸方向の押圧力を印加するばねと、前記各
フェルールを収納する一対のプラグハウジングとを備え
た光コネクタにおいて、前記各フェルールには軸対称に
２個の係止部を形成するとともに、前記各プラグハウジ
ングのフェルール収納部には軸対称に２個の係止部を形
成し、前記各フェルールの２個の係止部と係止するよう
軸対称に形成された第１の２個の被係止部と、前記各プ
ラグハウジングの２個の係止部と係止するよう軸対称に
形成された第２の２個の被係止部とを有し、かつ前記第
１の被係止部と前記第２の被係止部とは各々の対称軸が
互いに直交するように形成されてなる中間部材を設けた
。(Means for Solving the Problems) In order to achieve the above object, the present invention includes a pair of ferrules to which end portions of optical fibers are respectively fixed, an alignment sleeve into which the pair of ferrules are fitted and butted; In an optical connector comprising a spring that applies an axial pressing force to each ferrule, and a pair of plug housings that house the ferrules, each ferrule has two axially symmetrical locking portions, and , two locking portions are formed axially symmetrically in the ferrule housing portion of each of the plug housings, and first two locking portions are formed axially symmetrically so as to lock with the two locking portions of each of the ferrules. and a second two locked portions formed axially symmetrically so as to lock with the two locking portions of each of the plug housings; An intermediate member is provided in which the locking part and the second locked part are formed such that their axes of symmetry are perpendicular to each other.
（作 用）
本発明によれば、中間部材の第１の被係止部とフェルー
ルに設けられた係止部とを係止させるとともに、中間部
材の第２の被係止部とプラグハウジングの収納部に設け
られた係止部とを係止させることにより、フェルールが
プラグハウジングの中心に対して偏心することができ、
フェルールの浮動構造を確保したまま、プラグハウジン
グに対してフェルールの軸回りの角度の位置決めを高精
度に行なうことができる。(Function) According to the present invention, the first locked portion of the intermediate member and the locking portion provided on the ferrule are locked, and the second locked portion of the intermediate member and the locking portion of the plug housing are locked. By locking the ferrule with the locking part provided in the storage part, the ferrule can be eccentric with respect to the center of the plug housing.
The angular position of the ferrule around the axis relative to the plug housing can be determined with high precision while maintaining the floating structure of the ferrule.
（実施例）
第１図は、本発明による光コネクタの一実施例を示す断
面図である。第１図において、ｌａ。(Embodiment) FIG. 1 is a sectional view showing an embodiment of an optical connector according to the present invention. In FIG. 1, la.
１ｂは光ファイバ％ ２ａ、２ｂは光ファイバｌａ。1b is optical fiber % 2a, 2b is optical fiber la.
１ｂの端部が固定されるフェルールである。第２図はフ
ェルール２の形状を示す図であり、同図（ａ）はその側
面図で、同図（ｂ）は後端側の正面図である。第２図に
よれば、フェルール２は先端側に形成された後記する整
列スリーブに嵌挿される嵌挿部２１と、後端側に形成さ
れたフランジ部２２とからなり、フランジ部２２には軸
対称に形成された２個のキーＲ２３−１，２３−２が設
けられている。This is a ferrule to which the end of 1b is fixed. FIG. 2 is a diagram showing the shape of the ferrule 2, with FIG. 2(a) being a side view thereof and FIG. 2(b) being a front view of the rear end side. According to FIG. 2, the ferrule 2 consists of a fitting part 21 formed on the distal end side and fitted into an alignment sleeve to be described later, and a flange part 22 formed on the rear end side. Two symmetrically formed keys R23-1 and 23-2 are provided.
３は光ファイバｌａ、ｌｂの各々の端部が相互に軸方向
に整列、連結されるようフェルール２ａ。3 is a ferrule 2a so that the ends of the optical fibers la and lb are mutually aligned and connected in the axial direction.
２ｂが嵌挿され突合わされる整列スリーブ、４ａ。an alignment sleeve 4a into which the sleeves 2b and 2b are fitted and butted;
４ｂはフェルール２ａ、２ｂに軸方向に押圧力を印加す
るための押圧ばね、５ａ、５ｂはフェルール２ａ、
２ｂを固定することなく収納するプラグハウジングで、
このフェルール収納部に軸対称に形成された後記する２
個のキー５１−１．５１−２が設けられているとともに
、先端部外周には当該プラグハウジング５ａ、５ｂの角
度の位置決めを行なうためのキー５２ａ、５２ｂが設け
である。６ａ。4b is a pressing spring for applying a pressing force in the axial direction to the ferrules 2a and 2b; 5a and 5b are ferrules 2a;
A plug housing that stores 2b without fixing it,
2, which will be described later, is formed axially symmetrically in this ferrule housing part.
Keys 51-1 and 51-2 are provided, and keys 52a and 52b for angular positioning of the plug housings 5a and 5b are provided on the outer periphery of the tip. 6a.
６ｂはアダプタで、整列スリーブ３を固定することなく
収納するとともに、その外周にはプラグハウジング５ａ
、５ｂのキー５２ａ、５２ｂと係止するキー溝６１ａ、
６１ｂが形成してあり、プラグハウジング５ａ、５ｂの
一部に係止するカップリングナツト７ａ、７ｂを螺動す
ることにより一対のプラグハウジング５ａ、５ｂを結合
する。6b is an adapter which accommodates the alignment sleeve 3 without fixing it, and has a plug housing 5a on its outer periphery.
, a key groove 61a that locks with the keys 52a, 52b of 5b,
61b is formed, and the pair of plug housings 5a, 5b are coupled by screwing coupling nuts 7a, 7b which are engaged with parts of the plug housings 5a, 5b.
８ｇ、８ｂは略円筒状をなす中間部材で、フェルール２
ａ、２ｂのキー溝２１ａ−１、２３ａ−２，２３ｂ−１
、２３ｂ−２と係止するよう軸対称に形成された２個の
キー８１ａ−１、８１ａ−２，８１ｂ−１、８１ｂ−２
と、プラグハウジング５ａ、５ｂの２個のキー５１−１
．５１−２と係止するよう軸対称に形成された後記する
２個のキー溝８２−１．８２−２とを有し、フェルール
２と押圧ばね４との間に配設される。第３図は当該中間
部材８の形状を示す図で、同図（ａ）はフェルール２と
の係止状態を示す側面図で、同図（ｂ）はプラグハウジ
ング５との係止状態を示す正面図である。第３図におい
て、８１−１．８１−２は軸対称に形成されたキーで、
これらキ〜８１−１．８１−２はフェルール２の２個の
キー溝２３−１．２３−２と係止する。8g and 8b are approximately cylindrical intermediate members, and the ferrule 2
Key grooves 21a-1, 23a-2, 23b-1 of a and 2b
, 23b-2, two keys 81a-1, 81a-2, 81b-1, 81b-2 formed axially symmetrically so as to lock with
and the two keys 51-1 of the plug housings 5a and 5b.
．． It has two key grooves 82-1 and 82-2, which will be described later, formed axially symmetrically so as to engage with the ferrule 2 and the pressing spring 4. FIG. 3 is a diagram showing the shape of the intermediate member 8, FIG. 3(a) is a side view showing the state in which it is engaged with the ferrule 2, and FIG. 3(b) is a side view showing the state in which it is engaged with the plug housing 5. It is a front view. In Fig. 3, 81-1, 81-2 are keys formed axially symmetrically,
These keys 81-1.81-2 engage with two keyways 23-1.23-2 of the ferrule 2.
８２−１．８２−２は軸対称に形成されたキー溝で、こ
れらキー溝８２−１．８２−２はプラグハウジング５に
設けられた２個のキー５１−１．５１−２と係止し、第
３図（ｂ）に示すように、キー８１−１．８１２とキー
溝８２−１．８２−２とは各々の対称軸が互いに直交す
るように形成しである。また９ａ、９ｂはプラグハウジ
ング５ａ、５ｂの後端部に装着されるゴムフードである
。82-1.82-2 are key grooves formed axially symmetrically, and these key grooves 82-1.82-2 are engaged with two keys 51-1.51-2 provided in the plug housing 5. However, as shown in FIG. 3(b), the key 81-1.812 and the keyway 82-1.82-2 are formed such that their respective axes of symmetry are perpendicular to each other. Moreover, 9a and 9b are rubber hoods attached to the rear end portions of the plug housings 5a and 5b.
次に、上記構成による光コネクタの組立て方法について
説明する。まず、整列スリーブ３をアダプタ６ａ、６ｂ
に収納してアダプタを構成し、フェルール２ａ、２ｂの
キー溝２３ａ−１、２３ａ−２，２３ｂ−１、２３ｂ−
２と中間部材８ａ、８ｂのキー８１ａ−１。Next, a method of assembling the optical connector with the above configuration will be explained. First, attach the alignment sleeve 3 to the adapters 6a and 6b.
The key grooves 23a-1, 23a-2, 23b-1, 23b- of the ferrules 2a and 2b are
2 and the key 81a-1 of the intermediate members 8a, 8b.
８１ａ−２，８１ｂ−１、８１ｂ−２とを係止させると
ともに、プラグハウジング５ａ、５ｂのキー５１ａ−１
、５１ａ−２，５１ｂ−１、５１ｂ−２（第１図には図
示せず）とキー溝８２ａ−１、８２ａ−２，８２ｂ−１
、８２ｂ−２とを係止させてプラグを構成する。次に、
光ファイバ１ａの端部が固定されたフェルール２ａの嵌
挿部２１ａと、光ファイバ１ｂの端部が固定されたフェ
ルール２ｂの嵌挿部２１ｂとを整列スリーブ３に嵌挿し
、各光ファイバｌａ、ｌｂの端部が相互に軸方向に整列
、連結されるようフェルール２ａ、２ｂを突合わせると
ともに、プラグハウジング５ａ。81a-2, 81b-1, 81b-2, and the key 51a-1 of the plug housings 5a, 5b.
, 51a-2, 51b-1, 51b-2 (not shown in FIG. 1) and key grooves 82a-1, 82a-2, 82b-1.
, 82b-2 are engaged to form a plug. next,
The insertion part 21a of the ferrule 2a to which the end of the optical fiber 1a is fixed and the insertion part 21b of the ferrule 2b to which the end of the optical fiber 1b is fixed are inserted into the alignment sleeve 3, and each optical fiber la, The ferrules 2a and 2b are butted together so that the ends of the lbs are aligned and connected to each other in the axial direction, and the plug housing 5a.
５ｂの外周に設けられたキー５２ａ、５２ｂとアダプタ
６ａ、６ｂのキー溝６１ａ、６１ｂとを係止させ、カッ
プリングナツト７ａ、７ｂを螺動しプラグハウジング５
ａとプラグハウジング５ｂとを結合させることにより組
立てが完了する。The keys 52a, 52b provided on the outer periphery of the plug housing 5b are engaged with the keyways 61a, 61b of the adapters 6a, 6b, and the coupling nuts 7a, 7b are screwed on.
The assembly is completed by joining the plug housing 5b and the plug housing 5b.
以上のように組立てられる光コネクタにおいては、フェ
ルール２ａ、２ｂはそれぞれプラグハウジング５ａ、５
ｂに収納され、中間部材９ａ、９ｂを介して押圧ばね４
ａ、４ｂにより軸方向に押圧される。また、プラグハウ
ジング５ａ、５ａはアダプタ６ａ、６ｂを介してカップ
リングナツト７ａ、７ｂを螺動することにより互いに結
合されるが、フェルール２ａ、２ｂ及び整列スリーブ３
はプラグハウジング５ａ、５ｂ及びアダプタ６ａ。In the optical connector assembled as described above, the ferrules 2a and 2b are connected to the plug housings 5a and 5, respectively.
b, and press spring 4 is inserted through intermediate members 9a and 9b.
It is pressed in the axial direction by a and 4b. Further, the plug housings 5a, 5a are coupled to each other by screwing the coupling nuts 7a, 7b through the adapters 6a, 6b, and the ferrules 2a, 2b and the alignment sleeve 3
are plug housings 5a, 5b and adapter 6a.
６ｂに固定されずに浮動状態となるので、仮にプラグハ
ウジング５ａ、５ｂに外力が加わった場合でもフェルー
ル２ａ、２ｂの相互の高精度な接続に影響を及ぼすこと
はない。Since the plug housings 5a and 5b are not fixed to the ferrules 6b and are in a floating state, even if an external force is applied to the plug housings 5a and 5b, it will not affect the mutual high-precision connection of the ferrules 2a and 2b.
また、対称軸が互いに直交するように設けられたキー８
１ａ−１、８１ａ−２，８１ｂ−１、８１ｂ−２とキー
溝８２ａ−１、８２ａ−２，８２ｂ−１、８２ｂ−２を
有する中間部材８ａ、８ｂをプラグハウジング５ａ、５
ｂとフェルール２ａ、２ｂとの間に互いに上記した如く
係止するように介在させることにより、フェルール２ａ
、２ｂがプラグハウジング５ａ、５ｂの中心に対して偏
心することができ、このためフェルール２ａ、２ｂの浮
動構造を確保したまま、プラグハウジング５ａ、５ｂに
対してフェルール２ａ。Furthermore, the keys 8 are provided such that the axes of symmetry are perpendicular to each other.
1a-1, 81a-2, 81b-1, 81b-2 and key grooves 82a-1, 82a-2, 82b-1, 82b-2.
By interposing the ferrule 2a and the ferrules 2a and 2b so as to lock each other as described above, the ferrule 2a
, 2b can be eccentric with respect to the center of the plug housings 5a, 5b, so that the ferrules 2a can be eccentric with respect to the plug housings 5a, 5b while maintaining the floating structure of the ferrules 2a, 2b.
２ｂの軸回りの角度の位置決めを高精度に行なうことが
できる。さらに、プラグハウジング５ａ。The angle positioning around the axis 2b can be performed with high precision. Furthermore, a plug housing 5a.
５ｂとアダプタ６ａ、６ｂとの間はキー５２ａ。A key 52a is located between the key 5b and the adapters 6a and 6b.
５２ｂとキー溝６１ａ、６１ｂとにより位置決めがなさ
れるので、結合される相互のフェルール２ａ、２ｂの向
きを互いに一定に保持することができる。52b and the keyways 61a, 61b, the orientation of the mutually coupled ferrules 2a, 2b can be maintained constant.
またここで、第２図及び第３図において例えばフェルー
ル２のフランジ部２２の外径を４．６ｍｍとし、フェル
ール２のキー溝２３−１．２３−２と中間部材８のキー
８１−１．８１−２及びプラグハウジング５のキー５１
−１．５１−２と中間部材８のキー溝８２−１．８２−
２との隙間をそれぞれ０．０２５ｍｍ以下としたとする
と、フェルール２の軸回りの角度ずれは最大で次式のよ
うに、
ｊａｎ ”（０，０５／２．３）〜１３゜となり、この
ときの消光比は次式のように、１０１ｏｇ１０１ｏ ２
（１，３°＞”） 〜（−） ３３ ｄ Ｂとなる。従
って、フェルール２のキー＜２３−１．２３−２及びプ
ラグハウジング５のキー５１−１．５１−２と中間部材
８のキー８１−１．８１−２及びキー溝８２−１．８２
−２との隙間を小さくすることにより、フェルール２の
軸回りの回転に対して精度良く位置決めを行なえる。Further, in FIGS. 2 and 3, for example, the outer diameter of the flange portion 22 of the ferrule 2 is 4.6 mm, and the key groove 23-1.23-2 of the ferrule 2 and the key 81-1 of the intermediate member 8. 81-2 and the key 51 of the plug housing 5
-1.51-2 and key groove 82-1.82- of intermediate member 8
Assuming that the gap between ferrule 2 and ferrule 2 is 0.025 mm or less, the maximum angular deviation around the axis of ferrule 2 will be jan'' (0.05/2.3) to 13 degrees, as shown in the following formula, and in this case, The extinction ratio of is 101og101o 2 as shown in the following formula.
(1,3°>”) ~ (-) 33 d B. Therefore, the key <23-1.23-2 of the ferrule 2, the key 51-1.51-2 of the plug housing 5, and the intermediate member 8 Key 81-1.81-2 and keyway 82-1.82
By reducing the gap between the ferrule 2 and the ferrule 2, it is possible to accurately position the ferrule 2 with respect to its rotation around the axis.
第４図は本発明に係る中間部材の他の例を示す図であっ
て、同図（ａ）はフェルールとの係止状態を示す側面図
で、同図（ｂ）はプラグハウジングとの係止状態を示す
正面図である。第４図に示す中間部材８Ａと第３図に示
した中間部材８との相違はキー溝８２−１．８２−２の
代わりにキー８３−１．８３−２を形成し、これにより
プラグハウジング５のキー５１−１．５１−２の代わり
にキー溝５３−１．５３−２を形成したことにあり、そ
の他の作用、効果は第３図に示した中間部材と同様であ
る。FIG. 4 is a diagram showing another example of the intermediate member according to the present invention, in which FIG. 4(a) is a side view showing the state in which it is engaged with the ferrule, and FIG. It is a front view showing a stopped state. The difference between the intermediate member 8A shown in FIG. 4 and the intermediate member 8 shown in FIG. 3 is that a key 83-1.83-2 is formed in place of the key groove 82-1. The main feature is that a keyway 53-1.53-2 is formed instead of the key 51-1.51-2 of No. 5, and other functions and effects are the same as those of the intermediate member shown in FIG.
尚、中間部材８に形成されるキー８１−１．８１−２あ
るいはキー５３−１．５３−２及びキー溝８２−１．８
２−２、フェルール２に形成されるキー溝２３−１．２
３−２、プラグハウジング５に形成されるキー５１−１
．５１−２あるいはキー溝５３−１．５３−２は、互い
に係止状態を保持できればよく、キー、キー溝の対応は
本実施例に限定されるものでないことは勿論である。ま
た、本実施例ではフェルール２と押圧ばね４との間に中
間部材８を配設したが、フェルール２、中間部材８及び
押圧ばね４の位置は本実施例に限定されるものではない
。Note that the key 81-1.81-2 or key 53-1.53-2 and key groove 82-1.8 formed on the intermediate member 8
2-2, keyway 23-1.2 formed in ferrule 2
3-2, key 51-1 formed in plug housing 5
．． 51-2 or the key grooves 53-1 and 53-2 only need to be able to maintain a locked state with each other, and it goes without saying that the correspondence between the keys and the key grooves is not limited to this embodiment. Further, in this embodiment, the intermediate member 8 is disposed between the ferrule 2 and the pressure spring 4, but the positions of the ferrule 2, the intermediate member 8, and the pressure spring 4 are not limited to those in this embodiment.
（発明の効果）
以上説明したように、本発明によれば、光ファイバの端
部がそれぞれ固定される一対のフェルールと、前記一対
のフェルールが嵌挿され突合わされる整列スリーブと、
前記各フェルールに軸方向の押圧力を印加するばねと、
前記各フェルールを収納する一対のプラグハウジングと
を備えた光コネクタにおいて、前記各フェルールには軸
対称に２個の係止部を形成するとともに、前記各プラグ
ハウジングのフェルール収納部には軸対称に２個の係止
部を形成し、前記各フェルールの２個の係止部と係止す
るよう軸対称に形成された第１の２個の被係止部と、前
記各プラグハウジングの２個の係止部と係止するよう軸
対称に形成された第２の２個の被係止部とを有し、かつ
前記第１の被係止部と前記第２の被係止部とは各々の対
称軸が互いに直交するように形成されてなる中間部材を
設けたので、偏波保持光フアイバ同士をコネクタ接続し
ようとするときに互いの主軸方向の角度を精度良く合わ
せることができ、かつプラグハウジングに対しフェルー
ルを浮動させる二重嵌合方式を実現させることができる
ため、光ファイバの主軸方向とその直角方向の消光比と
して（−）３０ｄＢを実現し、かつ外力に対しても信頓
性の高い接続特性を実現できる利点がある。(Effects of the Invention) As explained above, according to the present invention, a pair of ferrules to which the ends of optical fibers are respectively fixed, an alignment sleeve into which the pair of ferrules are fitted and butted,
a spring that applies an axial pressing force to each of the ferrules;
In an optical connector comprising a pair of plug housings that house each of the ferrules, each of the ferrules is formed with two axially symmetrical locking portions, and each of the ferrule housing portions of each of the plug housings is provided with an axially symmetrical locking portion. two first locked parts forming two locking parts and formed axially symmetrically so as to lock with the two locking parts of each of the ferrules; and two first locked parts of each of the plug housings. and a second two locked parts formed axially symmetrically so as to lock with the locking part, and the first locked part and the second locked part are different from each other. Since the intermediate member is formed so that the respective axes of symmetry are orthogonal to each other, the angles in the directions of the main axes of the polarization maintaining optical fibers can be precisely matched when connecting the polarization maintaining optical fibers with each other. Since it is possible to realize a double fitting method in which the ferrule floats with respect to the plug housing, it is possible to achieve an extinction ratio of (-)30 dB in the direction of the main axis of the optical fiber and in the direction perpendicular to it, and it is stable against external forces. This has the advantage of achieving highly flexible connection characteristics.
第１図は本発明による光コネクタの一実施例を示す断面
図、第２図は本発明による光コネクタのフェルールの形
状を示す図、第３図は本発明に係る中間部材の形状を示
す図、第４図は本発明に係る中間部材の他の例を示す図
である。
図中、１・・・光ファイバ、２・・・フェルール、３・
・・整列スリーブ、４・・・押圧ばね、５・・・プラグ
ハウジング、６・・・アダプタ、８・・・中間部材、５
１．８１゜８３・・・キー、２Ｂ、５３．８２・・・キ
ー溝。
特許出願人 日本電信電話株式会社
代理人 弁理士 吉 １）精 孝
（ａ）
（ｂ）
フェルールの形状を示す図
第２図
８ｌ−２
（ａ）
２３：フェルールのキー
（ｂ）
４荀部材の形状を示す図
第３図FIG. 1 is a sectional view showing an embodiment of the optical connector according to the present invention, FIG. 2 is a view showing the shape of the ferrule of the optical connector according to the present invention, and FIG. 3 is a view showing the shape of the intermediate member according to the present invention. , FIG. 4 is a diagram showing another example of the intermediate member according to the present invention. In the figure, 1... optical fiber, 2... ferrule, 3...
... Alignment sleeve, 4... Pressure spring, 5... Plug housing, 6... Adapter, 8... Intermediate member, 5
1.81°83...Key, 2B, 53.82...Keyway. Patent Applicant Nippon Telegraph and Telephone Corporation Agent Patent Attorney Yoshi Yoshi 1) Takashi Sei (a) (b) Diagram showing the shape of the ferrule Figure 2 8l-2 (a) 23: Ferrule key (b) 4. Figure 3 showing the shape
Claims (1)
ルと、前記一対のフェルールが嵌挿され突合わされる整
列スリーブと、前記各フェルールに軸方向の押圧力を印
加するばねと、前記各フェルールを収納する一対のプラ
グハウジングとを備えた光コネクタにおいて、 前記各フェルールには軸対称に２個の係止部を形成する
とともに、 前記各プラグハウジングのフェルール収納部には軸対称
に２個の係止部を形成し、 前記各フェルールの２個の係止部と係止するよう軸対称
に形成された第１の２個の被係止部と、前記各プラグハ
ウジングの２個の係止部と係止するよう軸対称に形成さ
れた第２の２個の被係止部とを有し、かつ前記第１の被
係止部と前記第２の被係止部とは各々の対称軸が互いに
直交するように形成されてなる中間部材を設けた ことを特徴とする光コネクタ。[Scope of Claims] A pair of ferrules to which end portions of optical fibers are fixed, an alignment sleeve into which the pair of ferrules are fitted and abutted, and a spring that applies an axial pressing force to each of the ferrules. , an optical connector comprising a pair of plug housings that house each of the ferrules, wherein each of the ferrules is formed with two axially symmetrical locking portions, and the ferrule accommodating portion of each of the plug housings is formed with an axially symmetrical locking portion. two locking portions are formed on the plug housing, first two locked portions are formed axially symmetrically so as to lock with the two locking portions of each of the ferrules; two second locked parts formed axially symmetrically so as to lock with the second locked part, and the first locked part and the second locked part An optical connector is provided with an intermediate member formed such that respective axes of symmetry are orthogonal to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63060474A JPH0693050B2 (en) | 1988-03-16 | 1988-03-16 | Optical connector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63060474A JPH0693050B2 (en) | 1988-03-16 | 1988-03-16 | Optical connector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01234807A true JPH01234807A (en) | 1989-09-20 |
| JPH0693050B2 JPH0693050B2 (en) | 1994-11-16 |
Family
ID=13143306
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63060474A Expired - Fee Related JPH0693050B2 (en) | 1988-03-16 | 1988-03-16 | Optical connector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0693050B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010127824A (en) * | 2008-11-28 | 2010-06-10 | Sunx Ltd | Fiber support device for fiber sensor |
| JP2014076096A (en) * | 2012-10-09 | 2014-05-01 | Fujifilm Corp | Optical fiber holding device and endoscope system |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2909917T3 (en) | 2016-06-10 | 2022-05-10 | Ecolab Usa Inc | Dry low molecular weight polymer powder for use as a dry strength agent for papermaking |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5565915A (en) * | 1978-11-13 | 1980-05-17 | Nippon Telegr & Teleph Corp <Ntt> | Plug-in type optical connector |
| JPS5922406U (en) * | 1982-08-02 | 1984-02-10 | 日本電信電話株式会社 | fiber optic connector |
| JPS62129515U (en) * | 1986-02-08 | 1987-08-15 |
-
1988
- 1988-03-16 JP JP63060474A patent/JPH0693050B2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5565915A (en) * | 1978-11-13 | 1980-05-17 | Nippon Telegr & Teleph Corp <Ntt> | Plug-in type optical connector |
| JPS5922406U (en) * | 1982-08-02 | 1984-02-10 | 日本電信電話株式会社 | fiber optic connector |
| JPS62129515U (en) * | 1986-02-08 | 1987-08-15 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010127824A (en) * | 2008-11-28 | 2010-06-10 | Sunx Ltd | Fiber support device for fiber sensor |
| JP2014076096A (en) * | 2012-10-09 | 2014-05-01 | Fujifilm Corp | Optical fiber holding device and endoscope system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0693050B2 (en) | 1994-11-16 |
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