JP2005338664A - Optical connector - Google Patents

Optical connector Download PDF

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JP2005338664A
JP2005338664A JP2004160410A JP2004160410A JP2005338664A JP 2005338664 A JP2005338664 A JP 2005338664A JP 2004160410 A JP2004160410 A JP 2004160410A JP 2004160410 A JP2004160410 A JP 2004160410A JP 2005338664 A JP2005338664 A JP 2005338664A
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hole
ferrule
diameter portion
optical
optical connector
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JP4369800B2 (en
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Tomoki Inoue
智貴 井上
Koji Seo
浩司 瀬尾
Kenji Ueno
顕司 上野
Keimei Shiba
啓明 柴
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Furukawa Electric Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical connector in which a ferrule is more easily moved and rotated in one direction of either a longitudinal direction or a lateral direction. <P>SOLUTION: The size of a through-hole at a small diameter section is constituted to have a larger diameter compared with the external size of the ferrule including a collar at one side of either a longitudinal side or a lateral side. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、光ファイバ相互又は光部品と光ファイバとを接続する光コネクタに関するものである。   The present invention relates to an optical connector for connecting optical fibers to each other or optical components and an optical fiber.

この種の光コネクタは、図４〜６に示すように、先端１１に光ファイバ５１を挿通するための１乃至複数の微細孔１２を有し、後端１３に前記微細孔１２に連通した光ファイバ挿入口１４を備え、側面の周囲に鍔１５を有する断面が矩形形状のフェルール１０と、一端２１から他端２２に渡って貫通孔２３が形成され、かかる貫通孔２３の内部にその長手方向に沿って小径部２４と大径部２５とを有し、係る貫通孔２３の大径部２５内に前記フェルール１０の鍔１５を位置させ、フェルール１０の先端１１側が前記一端２１の方向を向くように、前記フェルール１０を貫通孔２３内に配置させるフレーム２０と、前記貫通孔２３内に配置され、前記フェルール１０に対してその後端１３から先端１１の方向に押圧力を付与するスプリング等の押圧部材３０と、押圧部材３０の後端３１側に配置された押圧部材ストッパ４０及びフレーム２０の後端に光ケーブル５０を保護するためのブーツ６０等から構成されている。（例えば特許文献１〜２）   As shown in FIGS. 4 to 6, this type of optical connector has one or a plurality of fine holes 12 for inserting an optical fiber 51 at the front end 11, and light that communicates with the fine holes 12 at the rear end 13. A ferrule 10 having a fiber insertion opening 14 and having a flange 15 around the side surface is formed in a rectangular shape, and a through hole 23 is formed from one end 21 to the other end 22. A small diameter portion 24 and a large diameter portion 25 are provided, and the flange 15 of the ferrule 10 is positioned in the large diameter portion 25 of the through hole 23, and the tip 11 side of the ferrule 10 faces the direction of the one end 21. As described above, the frame 20 for arranging the ferrule 10 in the through hole 23, and a spring or the like that is arranged in the through hole 23 and applies a pressing force to the ferrule 10 from the rear end 13 to the front end 11 thereof. A member 30, and a boot 60 or the like for protecting the optical cable 50 to the rear end of the pressing member stopper 40 and the frame 20 disposed on the rear end 31 side of the pressing member 30. (For example, Patent Documents 1 and 2)

このため、フェルール１０の先端１１側をフレーム２０の一端２１側を向くように配置させた状態で、鍔１５をフレーム２０の小径部２４で受け止め、フェルール１０がフレーム２０の前記一端２１側から抜け出ないようになっている。   Therefore, with the tip 11 side of the ferrule 10 facing the one end 21 side of the frame 20, the flange 15 is received by the small diameter portion 24 of the frame 20, and the ferrule 10 comes out of the one end 21 side of the frame 20. There is no such thing.

このような光コネクタは、貫通孔の形成された図示しない光コネクタアダプタ（以下単に光アダプタという）の両端から前記貫通孔内にそれぞれ対向するように挿入され、光アダプタ内でフェルール１０の微細孔１２内に配置された光ファイバ５１を互いに対向させて光学的に接続させたり、また、図８〜９に示すように、一端側の内部に半導体レーザ素子のような光学機器や光コネクタの光学機器７１が収納され、他端に光コネクタ挿入孔７２が形成された光レセプタクル７０の前記光コネクタ挿入孔７２に挿入されたりして、光学機器７１等と光ファイバ５１との接続がなされる。   Such an optical connector is inserted from both ends of an optical connector adapter (not shown) in which a through hole is formed (hereinafter simply referred to as an optical adapter) so as to face each other in the through hole. The optical fibers 51 disposed in the optical fiber 51 are optically connected to face each other, and as shown in FIGS. 8 to 9, an optical device such as a semiconductor laser element or an optical connector optical is provided inside one end side. The optical device 71 and the optical fiber 51 are connected by being inserted into the optical connector insertion hole 72 of the optical receptacle 70 in which the device 71 is accommodated and the optical connector insertion hole 72 is formed at the other end.

この際、光コネクタは、前記のとおりフレーム２０内に押圧部材３０が配置され、フェルール１０がその先端１１の方向に押圧されているので、光ファイバ５１の相互又は光ファイバ５１と光学機器７１等とを接続した際にフェルール１０が必要量後退しながら、互いのフェルール１０を互いに接触させた状態に保つことができ、光伝送損失を少なくして接続させることができる。   At this time, since the pressing member 30 is arranged in the frame 20 and the ferrule 10 is pressed in the direction of the distal end 11 of the optical connector as described above, the optical fibers 51 or the optical fiber 51 and the optical device 71 and the like. The ferrules 10 can be kept in contact with each other while the ferrules 10 are retracted by a necessary amount when they are connected to each other, and can be connected with reduced optical transmission loss.

また、このような光コネクタは、フレーム２０の貫通孔２３の大径部２５がフェルール１０の外径よりも大きく構成され、フェルール１０が貫通孔２３内でその貫通孔２３の径方向に移動できるように構成されている。このため、例えば図８〜９に示すように複数の光学機器７１等が光レセプタクル７０に所定間隔に配置固定されている場合に、機械的な寸法誤差等によって互いの光学機器７１等の光学軸が一致しなくとも、光コネクタ内のフェルール１０は前記光学機器７１等の光学軸と一致するようにフレーム２０内で径方向に移動し、且つ貫通孔２３の軸線に対して所定角度回転することができ、光学機器７１等と光ファイバ５１とを伝送損失を少なくして接続させることができる。   In such an optical connector, the large diameter portion 25 of the through hole 23 of the frame 20 is configured to be larger than the outer diameter of the ferrule 10, and the ferrule 10 can move in the radial direction of the through hole 23 in the through hole 23. It is configured as follows. For this reason, for example, as shown in FIGS. 8 to 9, when a plurality of optical devices 71 and the like are arranged and fixed to the optical receptacle 70 at a predetermined interval, the optical axes of the optical devices 71 and the like due to mechanical dimensional errors or the like. Even if they do not match, the ferrule 10 in the optical connector moves in the radial direction within the frame 20 so as to match the optical axis of the optical device 71 and the like, and rotates by a predetermined angle with respect to the axis of the through hole 23. The optical device 71 and the optical fiber 51 can be connected with reduced transmission loss.

また、光コネクタは、図７に示すように、貫通孔２３内の大径部２５と小径部２４との境界部分に傾斜面２６（テーパー）が形成されているものも存在する。このような光コネクタは、前記のとおり押圧部材３０によってフェルール１０がその先端１１方向に押圧されているので、光コネクタ相互の非接続状態ではフェルール１０の鍔１５の外周がその傾斜面に沿って貫通孔２３の径方向（中心軸方向）に移動する（自動センタリング機構という）。この結果、上記光ファイバ５１の相互又は光ファイバ５１と光学機器７１等とを接続させる際に、光コネクタのフェルールは接続相手方のアダプタの光学軸、又は光レセプタクルの光学軸に近づき、接続作業をスムーズに行うことができる。   In addition, as shown in FIG. 7, there is an optical connector in which an inclined surface 26 (taper) is formed at a boundary portion between the large diameter portion 25 and the small diameter portion 24 in the through hole 23. In such an optical connector, since the ferrule 10 is pressed in the direction of the tip 11 by the pressing member 30 as described above, the outer periphery of the flange 15 of the ferrule 10 extends along the inclined surface in a non-connected state between the optical connectors. It moves in the radial direction (center axis direction) of the through hole 23 (referred to as an automatic centering mechanism). As a result, when the optical fibers 51 or the optical fiber 51 and the optical device 71 are connected to each other, the ferrule of the optical connector approaches the optical axis of the adapter on the other end of the connection or the optical axis of the optical receptacle, and the connection work is performed. It can be done smoothly.

特開２００２−２３０１７１号公報JP 2002-230171 A 特開２００２−２６５９００号公報JP 2002-265900 A

従来の光コネクタは、上記のように、フレームの貫通孔内でフェルールがその径方向に移動や回転できるようになっているものも存在するが、その移動範囲は小径部の大きさで制限され、大きく径方向に移動することや回転することができなかった。特に光コネクタの短辺方向の移動範囲（クリアランス）は、フレームが外力により傾いたとき、長辺方向のクリアランスに比較して設計の自由度が少なく、大きなクリアランスを採る事が出来なかった。また、例えばフレームの小径部を構成する壁面の肉厚を薄くすると、フレーム内で押圧を受けたフェルールを受け止める部分が無くなり、またセンタリングのためのガイドが形成出来ないことで、相手方光コネクタのフレーム内部の貫通孔と当該フェルールとの間に大きな軸ずれが出来てしまい、光コネクタの嵌合時にフェルールの端面を破損させるという課題があった。   As described above, there are optical connectors in which the ferrule can be moved or rotated in the radial direction in the through hole of the frame as described above, but the moving range is limited by the size of the small diameter portion. It was not possible to move or rotate in the radial direction. In particular, the movement range (clearance) in the short side direction of the optical connector has less design freedom than the long side direction when the frame is tilted by an external force, and a large clearance cannot be taken. For example, if the wall thickness of the small-diameter portion of the frame is made thin, there is no portion that receives the ferrule that is pressed in the frame, and a guide for centering cannot be formed. There was a problem in that a large axial shift occurred between the internal through hole and the ferrule, and the end face of the ferrule was damaged when the optical connector was fitted.

本発明は、かかる点に鑑みなされたもので、先端に光ファイバ挿通用の微細孔を有し、後端に前記微細孔に連通する光ファイバ挿入口を備え、側面に鍔を有する断面が矩形のフェルールと、
一端から他端に渡って断面が矩形の貫通孔が形成され、かかる貫通孔の内部にその長手方向に沿って小径部と大径部とを有し、係る貫通孔の大径部内に前記フェルールの鍔部分を位置させ、フェルールの先端側を前記一端の方向を向くように、前記フェルールを貫通孔内に配置させるフレームと、
前記貫通孔内に配置され、前記フェルールに対してその後端から先端への方向に押圧力を付与する押圧部材とからなる光コネクタにおいて、
小径部における貫通孔の寸法が、鍔を含めたフェルールの外形寸法に比較して、縦又は横のいずれか一方の側で大きな径に構成されていることを特徴とする。 The present invention has been made in view of the above points, and has a fine hole for inserting an optical fiber at the tip, an optical fiber insertion opening communicating with the fine hole at a rear end, and a cross section having a flange on a side surface. And the ferrule
A through-hole having a rectangular cross section is formed from one end to the other end, and the ferrule has a small-diameter portion and a large-diameter portion along the longitudinal direction inside the through-hole, and the ferrule is disposed in the large-diameter portion of the through-hole. A frame in which the ferrule is positioned in the through hole so that the distal end side of the ferrule faces the direction of the one end.
In an optical connector comprising a pressing member that is disposed in the through hole and applies a pressing force in the direction from the rear end to the front end with respect to the ferrule,
The size of the through hole in the small diameter portion is configured to have a large diameter on either the vertical or horizontal side as compared with the outer dimension of the ferrule including the flange.

本発明による光コネクタは、上記のように、小径部における貫通孔の寸法が、鍔を含めたフェルールの外形寸法に比較して、縦又は横のいずれか一方の側で大きな径に構成されることにより、縦又は横のいずれか一方の方向にフェルールがより一層、移動及び回転させることができる。   In the optical connector according to the present invention, as described above, the size of the through hole in the small-diameter portion is configured to have a large diameter on either the vertical or horizontal side compared to the outer dimension of the ferrule including the flange. Thus, the ferrule can be further moved and rotated in either the vertical or horizontal direction.

フェルールの縦又は横のいずれか一方の側の辺のみに鍔が形成されていることを特徴とする。
フレームは、貫通孔の大径部と小径部との間に傾斜面が形成されていることを特徴とする。
フレームは、貫通孔の４隅付近に、前記テーパーとは異なる方向に傾斜面が形成されていることを特徴とする。 A wrinkle is formed only on either the vertical or horizontal side of the ferrule.
The frame is characterized in that an inclined surface is formed between a large diameter portion and a small diameter portion of the through hole.
The frame is characterized in that inclined surfaces are formed near the four corners of the through hole in a direction different from the taper.

以下、本発明を図示した実施例によって説明する。図１において、図４〜７に付した符号と同一の符号は、それぞれ図４〜７と同一物を指すもので、その説明を省略する。
図１の実施例は、図７の従来例とを比較して、小径部２４における貫通孔２３の短辺方向の寸法が大径部２５における短辺方向の寸法と同一に構成されている点が大きく異なっている。即ち、小径部２４における短辺方向の寸法Ａと大径部２５における短辺方向の寸法Ａ'点は同一寸法に構成されている。これに対して小径部２４における長辺方向の寸法Ｂは、大径部２５における長辺方向の寸法Ｂ'に比較して、従来と同様に、小さく構成されている。これによって、小径部２４における短辺方向の貫通孔２３の寸法が、鍔１５を含めたフェルール１０の短辺方向の外形寸法に比較して大きく開口している
従って図１(ハ)に示すように、フェルール１０は貫通孔２３内で大きな回転成す角θを形成することができ、図示しない相手方光コネクタの軸心が狂っていたり傾いていた場合であってもそれに沿って移動及び回転することができ、相手方光コネクタと接続損失を小さくして接続させることができる。 Hereinafter, the present invention will be described with reference to illustrated embodiments. In FIG. 1, the same reference numerals as those in FIGS. 4 to 7 denote the same parts as in FIGS. 4 to 7, and the description thereof is omitted.
The embodiment of FIG. 1 is configured so that the dimension in the short side direction of the through hole 23 in the small diameter portion 24 is the same as the dimension in the short side direction of the large diameter portion 25 in comparison with the conventional example in FIG. Are very different. That is, the dimension A in the short side direction in the small diameter portion 24 and the dimension A ′ in the short side direction in the large diameter portion 25 are configured to be the same dimension. On the other hand, the dimension B in the long side direction of the small diameter part 24 is smaller than the dimension B ′ in the long side direction of the large diameter part 25 as in the conventional case. As a result, the dimension of the through hole 23 in the short side direction in the small diameter portion 24 is larger than the outer dimension in the short side direction of the ferrule 10 including the flange 15, so as shown in FIG. In addition, the ferrule 10 can form a large rotation angle θ in the through hole 23, and can move and rotate along the axis of the other optical connector (not shown) even if it is out of alignment or tilted. And can be connected to the counterpart optical connector with reduced connection loss.

また、フレーム２０の貫通孔２３の大径部２５と小径部２４との段差間には、図２に示すように、短辺側に従来と同様に傾斜面（テーパー）Ｃが形成されている（図２(ロ)中で傾斜面を右向き矢印で示している）。他方、長辺側には前記のとおり寸同に構成されているため、大径部と小径部とが存在しないが、貫通孔２３の４隅で図２(ロ)に示すように、長辺側の段差部分に傾斜面（テーパー）Ｄが形成されている（図２(ロ)中で傾斜面を下向き矢印で示している）。
従って、非接続状態時におけるフェルール１０は、従来と同様の原理で短辺側の鍔１５が前記テーパーＣによって長辺方向に沿って移動し、これによりフェルール１０はフレーム２０の貫通孔２３の中心軸方向に移動する。また４隅の鍔１５はテーパーＤに沿って移動し、これによりフェルール１０はフレーム２０の貫通孔２３の中心軸方向に移動する。このようにしてフェルール１０の中心軸は縦方向及び横方向ともフレーム２０の貫通孔２３の中心位置近くに配置される。この結果、フェルール１０は接続相手方のアダプタの光学軸、又は光レセプタクルの光学軸に近づき、接続作業をスムーズに行なわせることができる。 Further, as shown in FIG. 2, an inclined surface (taper) C is formed on the short side between the steps of the large-diameter portion 25 and the small-diameter portion 24 of the through hole 23 of the frame 20 as in the prior art. (In FIG. 2 (b), the inclined surface is indicated by a right-pointing arrow). On the other hand, since the large-diameter portion and the small-diameter portion are not formed on the long side side as described above, the long side is formed at the four corners of the through hole 23 as shown in FIG. An inclined surface (taper) D is formed at the step portion on the side (the inclined surface is indicated by a downward arrow in FIG. 2 (b)).
Therefore, in the ferrule 10 in the disconnected state, the short side flange 15 is moved along the long side direction by the taper C according to the same principle as the conventional one, whereby the ferrule 10 is centered on the through hole 23 of the frame 20. Move in the axial direction. Further, the four corners 15 move along the taper D, whereby the ferrule 10 moves in the direction of the central axis of the through hole 23 of the frame 20. Thus, the central axis of the ferrule 10 is arranged near the center position of the through hole 23 of the frame 20 in both the vertical direction and the horizontal direction. As a result, the ferrule 10 approaches the optical axis of the adapter on the other end of the connection or the optical axis of the optical receptacle, and the connection work can be performed smoothly.

なお、上記実施例は、小径部２４における短辺方向の寸法Ａと大径部２５における短辺方向の寸法Ａ'点が同一寸法に構成され、小径部２４における貫通孔２３の長辺方向の寸法が、鍔を含めたフェルール１０の長辺方向の寸法に比較して大きな径に構成されている場合を説明したが、本発明は、上記実施例とは逆に、小径部２４における貫通孔２３の長辺方向の寸法が、鍔１５を含めたフェルール１０の長辺方向の寸法に比較して大きく構成されていても良い。このような構成であれば、長辺側のクリアランスを大きく構成することができ、長辺側のクリアランスを大きく必要とする光コネクタに採用することができる。   In the embodiment, the dimension A in the short side direction of the small diameter portion 24 and the dimension A ′ in the short side direction of the large diameter portion 25 are configured to be the same dimension, and the long diameter direction of the through hole 23 in the small diameter portion 24 is the same. Although the case where the dimension is configured to have a larger diameter than the dimension in the long side direction of the ferrule 10 including the flange has been described, the present invention is contrary to the above embodiment, and the through hole in the small diameter part 24 The dimension of the long side direction of 23 may be configured to be larger than the dimension of the ferrule 10 including the flange 15 in the long side direction. With such a configuration, the clearance on the long side can be made large, and can be adopted for an optical connector that requires a large clearance on the long side.

本発明の一実施例を示すものであり、図１(イ)は一部断面平面図、図１(ロ)は一部断面正面図、図１(ハ)は一部の内部構造を省略した説明図。FIG. 1 (a) is a partially sectional plan view, FIG. 1 (b) is a partially sectional front view, and FIG. 1 (c) is a partially omitted internal structure. Illustration. 図１に示す実施例の要部部品を説明するもので、図２(イ)は右側面図、図２(ロ)は要部拡大説明図。FIG. 2 (a) is a right side view and FIG. 2 (b) is an enlarged explanatory view of a main part. 図１(イ)の実施例の一部の内部構造を省略した右側面説明図。Explanatory drawing of the right side which abbreviate | omitted one part internal structure of the Example of FIG. 従来の一例を示す断面図。Sectional drawing which shows an example of the past. 図５(イ)は図４の平面図、図５(ロ)は図４の正面図。5A is a plan view of FIG. 4, and FIG. 5B is a front view of FIG. 図４に示す一例の左側面図。The left view of the example shown in FIG. 従来の他の例を示すもので、図７(イ)は一部断面平面図、図７(ロ)は一部断面正面図。FIG. 7A is a partial cross-sectional plan view, and FIG. 7B is a partial cross-sectional front view. 従来の一例における動作説明。Operation description in a conventional example. 図８の要部説明図。Explanatory drawing of the principal part of FIG.

符号の説明Explanation of symbols

１０ フェルール
１１ 先端
１２ 微細孔
１３ 後端
１４ 光ファイバ挿入口
１５ 鍔
２０ フレーム
２１ 一端
２２ 他端
２３ 貫通孔
２４ 小径部
２５ 大径部
２６ 傾斜面
３０ 押圧部材
３１ 後端
４０ 押圧部材ストッパ
５０ 光ケーブル
５１ 光ファイバ
６０ ブーツ
７０ 光レセプタクル
７１ 光学機器
７２ 光コネクタ挿入孔

10 Ferrule 11 Front end 12 Fine hole 13 Rear end 14 Optical fiber insertion port 15 鍔 20 Frame 21 One end 22 Other end 23 Through hole 24 Small diameter portion 25 Large diameter portion 26 Inclined surface 30 Press member 31 Rear end 40 Press member stopper 50 Optical cable 51 Optical fiber 60 Boot 70 Optical receptacle 71 Optical device 72 Optical connector insertion hole

Claims (4)

先端に光ファイバ挿通用の微細孔を有し、後端に前記微細孔に連通する光ファイバ挿入口を備え、側面に鍔を有する断面が矩形のフェルールと、
一端から他端に渡って断面が矩形の貫通孔が形成され、かかる貫通孔の内部にその長手方向に沿って小径部と大径部とを有し、係る貫通孔の大径部内に前記フェルールの鍔部分を位置させ、フェルールの先端側を前記一端の方向を向くように、前記フェルールを貫通孔内に配置させるフレームと、
前記貫通孔内に配置され、前記フェルールに対してその後端から先端への方向に押圧力を付与する押圧部材とからなる光コネクタにおいて、
小径部における貫通孔の寸法が、鍔を含めたフェルールの外形寸法に比較して、縦又は横のいずれか一方の側で大きな径に構成されていることを特徴とする光コネクタ。 A ferrule having a rectangular cross section having a fine hole for inserting an optical fiber at the front end, an optical fiber insertion port communicating with the fine hole at a rear end, and a flange on a side surface;
A through-hole having a rectangular cross section is formed from one end to the other end, and the ferrule has a small-diameter portion and a large-diameter portion along the longitudinal direction inside the through-hole, and the ferrule is disposed in the large-diameter portion of the through-hole. A frame in which the ferrule is positioned in the through hole so that the distal end side of the ferrule faces the direction of the one end.
In an optical connector comprising a pressing member that is disposed in the through hole and applies a pressing force in the direction from the rear end to the front end with respect to the ferrule,
An optical connector characterized in that the dimension of the through hole in the small-diameter portion is configured to have a larger diameter on either the vertical or horizontal side compared to the outer dimension of the ferrule including the flange. フェルールの縦又は横のいずれか一方の側の辺のみに鍔が形成されていることを特徴とする請求項１に記載の光コネクタ。   2. The optical connector according to claim 1, wherein a ridge is formed only on one side of either the vertical or horizontal side of the ferrule. フレームは、貫通孔の大径部と小径部との間に傾斜面が形成されていることを特徴とする請求項１又は請求項２に記載の光コネクタ。   The optical connector according to claim 1, wherein the frame has an inclined surface formed between a large diameter portion and a small diameter portion of the through hole. フレームは、貫通孔の４隅付近に、前記テーパーとは異なる方向に傾斜面が形成されていることを特徴とする請求項３に記載の光コネクタ。
4. The optical connector according to claim 3, wherein the frame has inclined surfaces formed in directions different from the taper in the vicinity of the four corners of the through hole.
JP2004160410A 2004-05-31 2004-05-31 Optical connector Expired - Fee Related JP4369800B2 (en)

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JP4369800B2 JP4369800B2 (en) 2009-11-25

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