JP3671371B2 - Relay optical connector - Google Patents

Relay optical connector Download PDF

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Publication number
JP3671371B2
JP3671371B2 JP2002116522A JP2002116522A JP3671371B2 JP 3671371 B2 JP3671371 B2 JP 3671371B2 JP 2002116522 A JP2002116522 A JP 2002116522A JP 2002116522 A JP2002116522 A JP 2002116522A JP 3671371 B2 JP3671371 B2 JP 3671371B2
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JP
Japan
Prior art keywords
optical connector
optical
optical fiber
adapter
relay
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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JP2002116522A
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Japanese (ja)
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JP2003315622A (en
Inventor
秀人 嶋津
利文 ▲高▼木
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Japan Aviation Electronics Industry Ltd
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Japan Aviation Electronics Industry Ltd
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Priority to JP2002116522A priority Critical patent/JP3671371B2/en
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Description

【0001】
【発明の属する技術分野】
本発明は、対向する一対の光ファイバを光学的に接続する中継光コネクタに関する。
【0002】
【従来の技術】
従来の中継光アダプタについて図4を参照して説明する。この中継光アダプタは、特開平9−222535号公報に記載されている。
【0003】
中継光アダプタのアダプタ本体41は、4角筒形状に構成され、アダプタ本体41の内面の中央に4角枠形状の係止壁41Aが突出するように形成される。係止壁41Aには、長方形状の貫通孔41Bが形成される。
【0004】
アダプタ本体41に挿入されるスリーブ42は、円筒形状に構成される。スリーブ42の外周面の中央には、周溝42Aが形成され、また、スリーブ42の両端外周部には、それぞれの端部方向に向かって縮径するようにテーパ面42Bが形成される。
【0005】
周溝42Aの幅寸法は、係止壁41Aの厚み寸法よりも僅かに大きく設定されると共に、周溝42Aの直径寸法は、貫通孔41Bの短辺寸法(上下方向の寸法)よりも僅かに小さく設定されている。また、周溝42Aの直径寸法と周溝42Aの深さ寸法の2倍との和、すなわち、スリーブ42の外径寸法は、貫通孔41Bの短辺寸法よりも大きく、かつ、貫通孔41Bの長辺寸法(左右方向の寸法)よりも小さく設定されている。
【0006】
スリーブ42をアダプタ本体41の一方端側から挿入すると、まず、スリーブ42のテーパ面42Bが係止壁41Aに押付けられ、係止壁41Aが撓むように変形し、貫通孔41Bが押し広げられる。更に、スリーブ42をアダプタ本体41内に押し込むと、係止壁41Aの貫通孔41Bの周縁部は、弾性復帰してスリーブ42の周溝42Aを係止する。この際、貫通孔41Bとスリーブ42の周溝42Aとの間に存在する若干の隙間によって、スリーブ42は貫通孔41B内にスリーブ42の長手方向に対して移動可能に、かつ、傾斜可能に保持される。
【0007】
スリーブ42の左右両端から、それぞれ光コネクタのフェルールに保持された光ファイバを挿入すると、各光ファイバの端面同士が対向して接触する。したがって、両光コネクタは、中継光アダプタを介して光結合される。
【0008】
【発明が解決しようとする課題】
前記従来の中継光アダプタでは、スリーブは中継光アダプタに抜出しないように保持されているにとどまり、両光コネクタの中心軸とスリーブの中心軸とがずれている場合の調整については、何等顧慮されていない。
【0009】
そこで、本発明は、前記従来の技術の欠点を改良し、両光コネクタの中心軸と中継光コネクタ(アダプタ)の中心軸とがずれている場合でも、両光コネクタの光結合を適切に行うことができる中継光コネクタ(アダプタ)を提供しようとするものである。
【0010】
【課題を解決するための手段】
本発明は、前記課題を解決するため、次の手段を採用する。
【0011】
一方の光コネクタと他方の光コネクタとを接続する中継光コネクタにおいて、前記中継光コネクタは、光ファイバと、前記光ファイバの一端部を保持する第1の光ファイバ保持部と、前記光ファイバの他端部を保持する第2の光ファイバ保持部と、前記両光ファイバ保持部を保持するアダプタ本体とを有し、前記アダプタ本体は、第1の突出部と、第2の突出部とを有し、前記第1の突出部が前記第1の光ファイバ保持部と、前記第2の突出部が前記第2の光ファイバ保持部と、それぞれ当接することにより、前記両光ファイバ保持部は、それぞれ前記光ファイバが配設される軸方向への移動を規制され、前記両光ファイバ保持部にリングがはめられ、前記各リングの外周面と前記アダプタ本体の内周面との間に隙間が存在し、前記両光ファイバ保持部は、それぞれ前記軸方向と直交する方向へ揺動可能に前記アダプタ本体に保持される中継光コネクタ。
【0013】
【発明の実施の形態】
本発明の3つの実施の形態例の中継光コネクタについて説明する。
【0014】
まず、本発明の第1実施の形態例について図1を参照して説明する。中継光コネクタ1は、図1(a)に示されるように、略円筒形状のアダプタ本体2と、アダプタ本体2の中心軸の一端から他端までの範囲にわたって配設される光ファイバ3Aと、光ファイバ3Aの一端部を保持する円筒形状のフェルール(光ファイバ保持部)4と、光ファイバ3Aの他端部を保持する円筒形状のフェルール(光ファイバ保持部)5と、両フェルール4,5の内端側にそれぞれ圧入されたリング6と、両フェルール4,5の間の光ファイバ3Aを被覆する外皮3Bとから構成される。
【0015】
両フェルール4,5の内端は、アダプタ本体2の両内側突出部2A,2Bにそれぞれ当接するので、両フェルール4,5は、アダプタ本体2の軸方向への移動を規制される。しかし、各フェルール4,5は、各リング6の外周面とアダプタ本体2の内周面との隙間Cの範囲内で、アダプタ本体2の軸方向と直交する方向へ揺動することができる。
【0016】
中継光コネクタ1に嵌合する光コネクタ11について図1(b)を参照して説明する。光コネクタ11は、略円筒形状の光コネクタ本体12と、光コネクタ本体12内の一端側に配設される固定円筒体13と、光コネクタ本体12内の中央に配設される可動円筒体14と、光コネクタ本体12の他端に形成されるフランジ12Aと可動円筒体14の一端側との間に介在されるコイルスプリング15と、光コネクタ本体12の中心軸の他端から一端付近まで挿入される光ファイバ16と、光ファイバ16の先端側を保持する円筒形状のフェルール17とから構成される。
【0017】
可動円筒体14は、コイルスプリング15に押圧されることによって固定円筒体13に当接する。フェルール17は、可動円筒体14に当接しているため、フェルール17と光ファイバ16は、図1(b)の位置よりも左方へは移動することができないが、コイルスプリング15を圧縮することによって、図1(b)の位置よりも右方へは若干移動することができる。
【0018】
図1(c)は、中継光コネクタ1の右側に光コネクタ11が既に嵌合し、中継光コネクタ1の左側に光コネクタ11が嵌合する前の状態を示す。中継光コネクタ1の右側に光コネクタ11が嵌合すると、光コネクタ11の光コネクタ本体12と固定円筒体13が中継光コネクタ1のアダプタ本体2を挟持し、フェルール4の先端とフェルール17の先端とが当接する。すると、フェルール4の先端と光ファイバ3Aの端面とが同一平面に位置し、かつ、フェルール17の先端と光ファイバ16の端面とが同一平面に位置するように設定されているので、光コネクタ11は、中継光コネクタ1の右側に正常に接続する。同様に、中継光コネクタ1の左側に他の光コネクタ11を嵌合すると、他の光コネクタ11は、中継光コネクタ1の左側に正常に接続する。したがって、両光コネクタ11は、中継光コネクタ1を介して適切に光結合される。
【0019】
右側の光コネクタ11の中心軸と中継光コネクタ1の中心軸とがずれている場合には、フェルール4は、リング6の外周面がアダプタ本体2の内周面に当接する限度で、すなわち、隙間Cの範囲内で、中心軸方向と直交する方向へ揺動する。したがって、前記両中心軸のずれは、吸収される。左側の光コネクタ11の中心軸と中継光コネクタ1の中心軸とがずれている場合も、同様である。よって、両光コネクタ11は、中継光コネクタ1を介して適切に光結合される。
【0020】
次に、本発明の第2の実施の形態例について図2を参照して説明する。
【0021】
第1実施の形態例は、光ファイバが一芯構造の中継光コネクタであるが、第2実施の形態例は、光ファイバ27が多芯構造の両側の光コネクタ26に対応して、光ファイバ22が多芯構造の中継光コネクタ21である。
【0022】
続いて、本発明の第3実施の形態例について図3を参照して説明する。
【0023】
第1実施の形態例は、同種の2つの光コネクタ11,11を接続する中継光コネクタであるが、第3実施の形態例は、異種の2つの光コネクタ35,38を接続する中継光コネクタである。すなわち、中継光コネクタ31の光ファイバ32の両端面は、右側の光コネクタ35の光ファイバ36の端面と左側の光コネクタ38の光ファイバ39の端面とに対向して接触する。
【0024】
第2及び第3実施の形態例における両中心軸のずれの対策は、第1実施の形態例と同様である。
【0025】
【発明の効果】
以上の説明から明らかなように、本発明によれば、次の効果が奏される。
【0026】
1.両コネクタの中心軸と中継光コネクタの中心軸とがずれている場合にも、両光コネクタは中継光コネクタを介して適切に光結合される。
【0027】
2.中継光コネクタは、光ファイバと、アダプタ本体と、2つの光ファイバ保持部(フェルール)と、2つのリングとから構成されるので、構造が簡素で、部品点数が少なく、組立分解が容易で、しかも、コストが安価である。
【図面の簡単な説明】
【図1】本発明の第1実施形態例の中継光コネクタとこれに嵌合する光コネクタの断面図と正面図の折半図であり、(a)は中継光コネクタ、(b)は光コネクタ、(c)は中継光コネクタの右側に光コネクタが嵌合し、左側に光コネクタが嵌合する前の状態を、それぞれ示す。
【図2】本発明の第2の実施の形態例の多芯構造の中継光コネクタと多芯構造の2つの光コネクタとが嵌合する前の状態を示す断面図と正面図の折半図である。
【図3】本発明の第3実施の形態例の異種の2つの光コネクタを接続する中継光コネクタとこれらの光コネクタとが嵌合する前の状態を示す断面図と正面図の折半図である。
【図4】従来の中継光アダプタの断面図である。
【符号の説明】
1 中継光コネクタ
2 アダプタ本体
2A 内側突出部
2B 内側突出部
3A 光ファイバ
3B 外皮
4 フェルール(光ファイバ保持部)
5 フェルール
6 リング
11 光コネクタ
12 光コネクタ本体
12A フランジ
13 固定円筒体
14 可動円筒体
15 コイルスプリング
16 光ファイバ
17 フェルール
21 中継光コネクタ
22 光ファイバ
26 光コネクタ
27 光ファイバ
31 中継光コネクタ
32 光ファイバ
35 光コネクタ
36 光ファイバ
38 光コネクタ
39 光ファイバ
C 隙間
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a relay optical connector that optically connects a pair of opposed optical fibers.
[0002]
[Prior art]
A conventional repeater optical adapter will be described with reference to FIG. This relay optical adapter is described in Japanese Patent Laid-Open No. 9-222535.
[0003]
The adapter main body 41 of the relay light adapter is formed in a quadrangular cylindrical shape, and is formed such that a quadrangular frame-shaped locking wall 41A projects from the center of the inner surface of the adapter main body 41. A rectangular through hole 41B is formed in the locking wall 41A.
[0004]
The sleeve 42 inserted into the adapter main body 41 is configured in a cylindrical shape. A circumferential groove 42A is formed at the center of the outer peripheral surface of the sleeve 42, and tapered surfaces 42B are formed at the outer peripheral portions at both ends of the sleeve 42 so as to reduce the diameter toward the respective end portions.
[0005]
The width dimension of the circumferential groove 42A is set slightly larger than the thickness dimension of the locking wall 41A, and the diameter dimension of the circumferential groove 42A is slightly smaller than the short side dimension (vertical dimension) of the through hole 41B. It is set small. Further, the sum of the diameter dimension of the circumferential groove 42A and twice the depth dimension of the circumferential groove 42A, that is, the outer diameter dimension of the sleeve 42 is larger than the short side dimension of the through hole 41B, and the through hole 41B. It is set smaller than the long side dimension (the dimension in the left-right direction).
[0006]
When the sleeve 42 is inserted from one end side of the adapter main body 41, first, the tapered surface 42B of the sleeve 42 is pressed against the locking wall 41A, the locking wall 41A is deformed to bend, and the through hole 41B is expanded. Further, when the sleeve 42 is pushed into the adapter main body 41, the peripheral edge portion of the through hole 41B of the locking wall 41A is elastically restored to lock the circumferential groove 42A of the sleeve 42. At this time, the sleeve 42 is held in the through hole 41B so as to be movable and inclined with respect to the longitudinal direction of the sleeve 42 by a slight gap existing between the through hole 41B and the circumferential groove 42A of the sleeve 42. Is done.
[0007]
When the optical fibers held by the ferrules of the optical connectors are inserted from the left and right ends of the sleeve 42, the end faces of the optical fibers are opposed to and in contact with each other. Therefore, both optical connectors are optically coupled via the relay optical adapter.
[0008]
[Problems to be solved by the invention]
In the conventional repeater optical adapter, the sleeve is held so as not to be pulled out from the repeater optical adapter, and there is no consideration for adjustment when the center axis of both optical connectors is shifted from the center axis of the sleeve. Not.
[0009]
Therefore, the present invention improves the drawbacks of the prior art and appropriately performs optical coupling of both optical connectors even when the central axis of both optical connectors and the central axis of the relay optical connector (adapter) are misaligned. It is an object of the present invention to provide a relay optical connector (adapter) that can be used.
[0010]
[Means for Solving the Problems]
The present invention employs the following means in order to solve the above problems.
[0011]
In the relay optical connector that connects one optical connector to the other optical connector, the relay optical connector includes an optical fiber, a first optical fiber holding unit that holds one end of the optical fiber, and the optical fiber. A second optical fiber holding portion for holding the other end portion, and an adapter main body for holding the both optical fiber holding portions; and the adapter main body includes a first protrusion and a second protrusion. The first protrusion is in contact with the first optical fiber holding part, and the second protrusion is in contact with the second optical fiber holding part. , The movement in the axial direction in which the optical fibers are disposed is restricted, the rings are fitted to the optical fiber holding portions, and a gap is formed between the outer peripheral surface of each ring and the inner peripheral surface of the adapter body. And the both optical fibers Bar holding portion relay optical connector to be held in each of the adapter body swingably in a direction perpendicular to the axial direction.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
The relay optical connector according to three embodiments of the present invention will be described.
[0014]
First, a first embodiment of the present invention will be described with reference to FIG. As shown in FIG. 1A, the relay optical connector 1 includes a substantially cylindrical adapter body 2 and an optical fiber 3A disposed over a range from one end to the other end of the central axis of the adapter body 2. A cylindrical ferrule (optical fiber holding portion) 4 that holds one end of the optical fiber 3A, a cylindrical ferrule (optical fiber holding portion) 5 that holds the other end of the optical fiber 3A, and both ferrules 4, 5 The ring 6 is press-fitted on the inner end side of each, and the outer cover 3B that covers the optical fiber 3A between the ferrules 4 and 5 is formed.
[0015]
Since the inner ends of both ferrules 4 and 5 are in contact with both inner projecting portions 2A and 2B of the adapter body 2, the ferrules 4 and 5 are restricted from moving in the axial direction of the adapter body 2. However, the ferrules 4 and 5 can swing in a direction perpendicular to the axial direction of the adapter main body 2 within a range of a gap C between the outer peripheral surface of each ring 6 and the inner peripheral surface of the adapter main body 2.
[0016]
The optical connector 11 fitted to the relay optical connector 1 will be described with reference to FIG. The optical connector 11 includes a substantially cylindrical optical connector main body 12, a fixed cylindrical body 13 disposed on one end side in the optical connector main body 12, and a movable cylindrical body 14 disposed in the center of the optical connector main body 12. And a coil spring 15 interposed between the flange 12A formed at the other end of the optical connector body 12 and one end side of the movable cylindrical body 14 and the other end of the central axis of the optical connector body 12 to the vicinity of one end. And the cylindrical ferrule 17 that holds the distal end side of the optical fiber 16.
[0017]
The movable cylindrical body 14 comes into contact with the fixed cylindrical body 13 by being pressed by the coil spring 15. Since the ferrule 17 is in contact with the movable cylindrical body 14, the ferrule 17 and the optical fiber 16 cannot move to the left of the position of FIG. 1B, but compress the coil spring 15. Thus, it is possible to move slightly to the right from the position in FIG.
[0018]
FIG. 1C shows a state before the optical connector 11 is already fitted on the right side of the relay optical connector 1 and before the optical connector 11 is fitted on the left side of the relay optical connector 1. When the optical connector 11 is fitted to the right side of the relay optical connector 1, the optical connector main body 12 and the fixed cylindrical body 13 of the optical connector 11 sandwich the adapter main body 2 of the relay optical connector 1, and the tip of the ferrule 4 and the tip of the ferrule 17 And abut. Then, since the tip of the ferrule 4 and the end face of the optical fiber 3A are set on the same plane, and the tip of the ferrule 17 and the end face of the optical fiber 16 are set on the same plane, the optical connector 11 is set. Is normally connected to the right side of the relay optical connector 1. Similarly, when another optical connector 11 is fitted to the left side of the relay optical connector 1, the other optical connector 11 is normally connected to the left side of the relay optical connector 1. Therefore, both optical connectors 11 are appropriately optically coupled via the relay optical connector 1.
[0019]
When the center axis of the right optical connector 11 and the center axis of the relay optical connector 1 are deviated from each other, the ferrule 4 is limited to the extent that the outer peripheral surface of the ring 6 contacts the inner peripheral surface of the adapter body 2, that is, Within the range of the gap C, it swings in a direction perpendicular to the central axis direction. Therefore, the deviation between the two central axes is absorbed. The same applies when the center axis of the left optical connector 11 and the center axis of the relay optical connector 1 are deviated. Therefore, both optical connectors 11 are appropriately optically coupled via the relay optical connector 1.
[0020]
Next, a second embodiment of the present invention will be described with reference to FIG.
[0021]
In the first embodiment, the optical fiber is a repeater optical connector having a single-core structure, but in the second embodiment, the optical fiber 27 corresponds to the optical connectors 26 on both sides of the multi-core structure. Reference numeral 22 denotes a multi-core relay optical connector 21.
[0022]
Next, a third embodiment of the present invention will be described with reference to FIG.
[0023]
The first embodiment is a repeater optical connector that connects two optical connectors 11 and 11 of the same type, but the third embodiment is a repeater optical connector that connects two different optical connectors 35 and 38. It is. That is, both end surfaces of the optical fiber 32 of the relay optical connector 31 are in contact with and opposed to the end surface of the optical fiber 36 of the right optical connector 35 and the end surface of the optical fiber 39 of the left optical connector 38.
[0024]
The countermeasures for the deviation of both central axes in the second and third embodiments are the same as those in the first embodiment.
[0025]
【The invention's effect】
As will be apparent from the above description, the present invention provides the following effects.
[0026]
1. Even when the center axis of both connectors and the center axis of the relay optical connector are deviated, both optical connectors are appropriately optically coupled via the relay optical connector.
[0027]
2. The repeater optical connector is composed of an optical fiber, an adapter body, two optical fiber holders (ferrules), and two rings, so the structure is simple, the number of parts is small, and assembly and disassembly are easy. Moreover, the cost is low.
[Brief description of the drawings]
FIGS. 1A and 1B are a cross-sectional view and a half view of a front view of a repeater optical connector according to a first embodiment of the present invention and an optical connector fitted thereto; FIG. (C) shows the state before the optical connector is fitted on the right side of the relay optical connector and the optical connector is fitted on the left side.
FIGS. 2A and 2B are a sectional view and a half view of a front view showing a state before the multi-core structure repeater optical connector and the two multi-core structure optical connectors of the second embodiment of the present invention are fitted together; is there.
FIGS. 3A and 3B are a cross-sectional view and a half view of a front view showing a state before a relay optical connector for connecting two different optical connectors of the third embodiment of the present invention and these optical connectors are fitted together; is there.
FIG. 4 is a cross-sectional view of a conventional repeater optical adapter.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Relay optical connector 2 Adapter main body 2A Inner protrusion 2B Inner protrusion 3A Optical fiber 3B Outer skin 4 Ferrule (optical fiber holding part)
5 Ferrule 6 Ring 11 Optical Connector 12 Optical Connector Body 12A Flange 13 Fixed Cylindrical Body 14 Movable Cylindrical Body 15 Coil Spring 16 Optical Fiber 17 Ferrule 21 Relay Optical Connector 22 Optical Fiber 26 Optical Connector 27 Optical Fiber 31 Relay Optical Connector 32 Optical Fiber 35 Optical connector 36 Optical fiber 38 Optical connector 39 Optical fiber C Clearance

Claims (1)

一方の光コネクタと他方の光コネクタとを接続する中継光コネクタにおいて、
前記中継光コネクタは、光ファイバと、前記光ファイバの一端部を保持する第1の光ファイバ保持部と、前記光ファイバの他端部を保持する第2の光ファイバ保持部と、前記両光ファイバ保持部を保持するアダプタ本体とを有し、
前記アダプタ本体は、第1の突出部と、第2の突出部とを有し、前記第1の突出部が前記第1の光ファイバ保持部と、前記第2の突出部が前記第2の光ファイバ保持部と、それぞれ当接することにより、前記両光ファイバ保持部は、それぞれ前記光ファイバが配設される軸方向への移動を規制され、
前記両光ファイバ保持部にリングがはめられ、前記各リングの外周面と前記アダプタ本体の内周面との間に隙間が存在し、前記両光ファイバ保持部は、それぞれ前記軸方向と直交する方向へ揺動可能に前記アダプタ本体に保持されることを特徴とする中継光コネクタ。
In the relay optical connector that connects one optical connector and the other optical connector,
The relay optical connector includes: an optical fiber; a first optical fiber holding unit that holds one end of the optical fiber; a second optical fiber holding unit that holds the other end of the optical fiber; An adapter body for holding the fiber holding portion;
The adapter main body has a first protrusion and a second protrusion, the first protrusion being the first optical fiber holding part, and the second protrusion being the second protrusion. By abutting with the optical fiber holding portions, respectively, both the optical fiber holding portions are restricted from moving in the axial direction in which the optical fibers are respectively disposed.
Rings are fitted to the both optical fiber holding portions, and a gap exists between the outer peripheral surface of each ring and the inner peripheral surface of the adapter main body, and both the optical fiber holding portions are orthogonal to the axial direction, respectively. A repeater optical connector, wherein the repeater optical connector is held by the adapter main body so as to be swingable in a direction .
JP2002116522A 2002-04-18 2002-04-18 Relay optical connector Expired - Lifetime JP3671371B2 (en)

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JP3671371B2 true JP3671371B2 (en) 2005-07-13

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