JPH11305073A - Optical connector - Google Patents

Optical connector

Info

Publication number
JPH11305073A
JPH11305073A JP13124498A JP13124498A JPH11305073A JP H11305073 A JPH11305073 A JP H11305073A JP 13124498 A JP13124498 A JP 13124498A JP 13124498 A JP13124498 A JP 13124498A JP H11305073 A JPH11305073 A JP H11305073A
Authority
JP
Japan
Prior art keywords
ferrule
connector
housing
axial direction
peripheral surface
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
JP13124498A
Other languages
Japanese (ja)
Other versions
JP3973177B2 (en
Inventor
Kazuhiro Takizawa
和宏 瀧澤
Yasuhiro Tamaki
康博 玉木
Toru Arikawa
徹 有川
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.)
Fujikura Ltd
Original Assignee
Fujikura 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 Fujikura Ltd filed Critical Fujikura Ltd
Priority to JP13124498A priority Critical patent/JP3973177B2/en
Publication of JPH11305073A publication Critical patent/JPH11305073A/en
Application granted granted Critical
Publication of JP3973177B2 publication Critical patent/JP3973177B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Abstract

PROBLEM TO BE SOLVED: T hold a ferrule at a fixed position in a housing before connector connection and to enable the ferrule to float in the housing after the connector connection. SOLUTION: At a collar part 26 of a nearly square ferrule 22, a positioning peripheral surface part 26a which engages the peripheral surface part 29a of a positioning hold part 29 in a housing 25 into a nearly square cylinder shape and an escape peripheral surface part 26b, which is tapered backward along the connector axis are formed. The part 23a in the internal space 23 of the housing 25 is made wide on the side of the collar part 26. The positioning peripheral surface part 26a of the collar part 26 of the ferrule 22 and the peripheral surface part 29a of the positioning part 29 engages prior to connector connection to hold the ferrule 26 at the fixed position, and ferrules are easily connected abutting against each other. While the ferrule 26 is pushed into the housing 25, the collar part 26 can float in the internal space 23a of the housing 25.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】この発明は,光ファイバを挿
通固定し接合端面を形成した概ね角形のフェルールを,
概ね角筒状のハウジング内にコネクタ軸方向に弾性的に
移動可能に収容した構造を持つ,いわゆるMPO光コネ
クタとも呼ばれる光コネクタに関する。
BACKGROUND OF THE INVENTION The present invention relates to a ferrule having a substantially rectangular shape in which an optical fiber is inserted and fixed to form a joint end face.
The present invention relates to an optical connector, also referred to as a so-called MPO optical connector, having a structure housed in a substantially rectangular cylindrical housing so as to be elastically movable in a connector axial direction.

【0002】[0002]

【従来の技術】図6に示すように,例えば光ファイバテ
ープ心線の一括接続をプッシュオン・プルオフという簡
単な操作で行うことを可能にした,MPO光コネクタ等
と呼ばれる光コネクタ1が知られている。この光コネク
タ1は,光ファイバ心線(光ファイバテープ心線)12
の先端に取り付けたプラスチック製の概ね角形のフェル
ール2を概ね角筒状のハウジング5内にコネクタ軸方向
(図中の矢印a・矢印b方向)に移動可能に収容し,か
つ前記フェルール2をコネクタ軸方向先端側(矢印a
側)に押圧する押圧バネを内蔵し,ハウジング5の外周
に概ね角筒状のカップリング6を設けた構造である。前
記フェルール2は,JISC5981のF12型光ファ
イバコネクタのようなピン嵌合位置合わせ方式の光コネ
クタに相当するものであって,プラスチック成形品に設
けた光ファイバ穴に光ファイバを挿通固定した後,その
先端面を例えばPC(Physical Contact)研磨して接合
端面2aを形成し,かつ,ガイドピン穴に嵌入したガイ
ドピン3により,フェルール2どうしの突き合わせ接続
時の相互の位置合わせ行うようにした構造である。な
お,フェルール2を光ファイバ心線12に取り付ける場
合,光ファイバ心線12の先端(被覆を除去した光ファ
イバ)を接合端面2aに直接露出させる場合と,予めフ
ェルール2に内蔵させた短尺の光ファイバに光ファイバ
心線12の先端(光ファイバ)をフェルール2内で突き
合わせ接続する場合とがある。この種の光コネクタ1ど
うしを互いにコネクタ接続する場合,各光コネクタ1を
図6中に示したようなアダプタ10の両側からそれぞれ
差し込んで,係合突起9等によりアダプタ10と係合さ
せ,それぞれのフェルール2の接合端面2aを互いに突
き合わせ接続する。なお,図6に示された光コネクタ1
は,従来例および本発明に概ね共通である。
2. Description of the Related Art As shown in FIG. 6, there is known an optical connector 1 called an MPO optical connector or the like, which makes it possible to carry out batch connection of optical fiber ribbons by a simple operation such as push-on / pull-off. ing. The optical connector 1 has an optical fiber core (optical fiber tape) 12
The ferrule 2 made of plastic is attached to the end of the housing so as to be movable in the connector axial direction (directions of arrows a and b in the figure) in a housing 5 having a substantially cylindrical shape, and the ferrule 2 is connected to the connector. Axial tip (arrow a
Side), and has a structure in which a coupling 6 having a substantially rectangular cylindrical shape is provided on the outer periphery of the housing 5. The ferrule 2 corresponds to a pin-fitting type optical connector such as an F12 type optical fiber connector of JIS C5981, and after inserting and fixing an optical fiber into an optical fiber hole provided in a plastic molded product, The tip end surface is polished, for example, by PC (Physical Contact) to form a joint end surface 2a, and the guide pins 3 inserted into the guide pin holes are used to perform mutual alignment when the ferrules 2 are butt-connected. It is. When the ferrule 2 is attached to the optical fiber 12, the tip (the optical fiber from which the coating is removed) of the optical fiber 12 is directly exposed to the joint end face 2 a, or a short light that is built in the ferrule 2 in advance. In some cases, the tip (optical fiber) of the optical fiber core 12 is butt-connected to the fiber in the ferrule 2. When optical connectors 1 of this kind are connected to each other, each optical connector 1 is inserted from both sides of the adapter 10 as shown in FIG. Of the ferrules 2 are butted and connected to each other. The optical connector 1 shown in FIG.
Is generally common to the conventional example and the present invention.

【0003】図7に従来の光コネクタ1’の内部構造を
示す。この光コネクタ1’の外観は図6と概ね同じであ
る。フェルール2’はコネクタ軸方向後端側(矢印b
側)に鍔部16を備え,この鍔部16がハウジング5’
側に設けた段部19と係合して,フェルール2’のコネ
クタ軸方向先端側(矢印a側)への移動が規制される。
また,フェルール2’は,ハウジング5’内に配置した
前述の押圧バネ7によりコネクタ軸方向先端側(矢印a
側)に押圧されている。この押圧バネ7は,ハウジング
5’内に後端側から押し込まれてハウジング5’と爪1
5aで係合する後部ハウジング15で反力を受け止めら
れる。また,図7において,11は光ファイバ心線12
のフェルール2’への差し込み部を保護するゴム製のブ
ーツである。4はフェルール2’のガイドピン穴に通さ
れたガイドピン3をクランプするピンクランプであり,
前記ブーツ11を囲む形状である。8は前記カップリン
グ6をコネクタ軸方向先端側に押し付ける(ないしハウ
ジング5’をコネクタ軸方向後端側に押し付ける)スプ
リングであり,ハウジング5’の左右側面部(図7で上
下の両側部)においてそれぞれカップリング6の内面と
の間に配置されている。なお,図7に示した構造は,フ
ェルール2’およびハウジング5’以外の部分は,後述
する本発明と基本的には同じである。
FIG. 7 shows the internal structure of a conventional optical connector 1 '. The appearance of the optical connector 1 'is substantially the same as that of FIG. The ferrule 2 'is located at the rear end in the axial direction of the connector (arrow b).
Side), a flange 16 is provided on the housing 5 ′.
By engaging with the step 19 provided on the side, the movement of the ferrule 2 'toward the distal end side (arrow a side) in the connector axial direction is regulated.
Further, the ferrule 2 'is moved to the front end side in the connector axial direction (arrow a) by the aforementioned pressing spring 7 arranged in the housing 5'.
Side). The pressing spring 7 is pushed into the housing 5 'from the rear end side, and the housing 5'
The reaction force is received by the rear housing 15 engaged at 5a. In FIG. 7, reference numeral 11 denotes an optical fiber
Is a rubber boot that protects a part inserted into the ferrule 2 ′. Reference numeral 4 denotes a pin clamp which clamps the guide pin 3 passed through the guide pin hole of the ferrule 2 '.
It has a shape surrounding the boot 11. Reference numeral 8 denotes a spring for pressing the coupling 6 toward the front end in the axial direction of the connector (or pressing the housing 5 'toward the rear end in the axial direction of the connector). Each is disposed between the inner surface of the coupling 6. The structure shown in FIG. 7 is basically the same as that of the present invention described later except for the ferrule 2 'and the housing 5'.

【0004】図8は図7におけるフェルール2’および
ハウジング5’の部分のみを示した図,図9は図8のA
−A断面図である。なお,図8,図9ではガイドピン
3,ピンクランプ13,押圧バネ7,後部ハウジング1
5も省略している。前述のように,フェルール2’はハ
ウジング5’内でコネクタ軸方向に移動可能であるが,
従来は一般に,フェルール2’の主体部(鍔部16を除
く部分)17がハウジング5’の内面5’bと接触し
て,コネクタ軸方向に移動する嵌合構造としている。
FIG. 8 shows only the ferrule 2 'and the housing 5' in FIG. 7, and FIG. 9 shows A in FIG.
It is -A sectional drawing. 8 and 9, the guide pin 3, the pin clamp 13, the pressing spring 7, and the rear housing 1 are shown.
5 is also omitted. As described above, the ferrule 2 ′ is movable in the connector axial direction within the housing 5 ′.
Conventionally, in general, a fitting structure in which a main body portion (a portion excluding a flange portion 16) 17 of a ferrule 2 'comes into contact with an inner surface 5'b of a housing 5' and moves in a connector axial direction.

【0005】上記のような2つの光コネクタ1’を前記
アダプタ10の両側から差し込んで,互いにコネクタ接
続する場合,光コネクタ1’をアダプタ10内に押し込
むと,カップリング6の外周に突設した係合用突起9に
より光コネクタ1’がアダプタ10に係合するととも
に,相手側光コネクタ1’のフェルール2’とはガイド
ピン3によって相互の位置合わせがなされる。そして,
コネクタ接続前には,各光コネクタ1’のフェルール
2’は,それぞれハウジング5’内で押圧バネ7で押さ
れてコネクタ軸方向先端側(矢印a側)に位置している
(図7〜図9の状態)が,互いのフェルール2’の接合
端面2’aどうしが突き当たると,各フェルール2’は
押圧バネ7の反力に抗してハウジング5’の奥方(コネ
クタ軸方向後端側:矢印b側)に押し込まれ,これによ
りアダプタ10に係合する2つの光コネクタ1は,それ
ぞれのフェルール2’の接合端面2’aどうしが押圧バ
ネ7による一定の圧力を受けた状態で突き合わせ接続さ
れる。
When the two optical connectors 1 ′ as described above are inserted from both sides of the adapter 10 and are connected to each other, the optical connector 1 ′ is pushed into the adapter 10 so as to protrude from the outer periphery of the coupling 6. The optical connector 1 'is engaged with the adapter 10 by the engaging projection 9, and the ferrule 2' of the mating optical connector 1 'is aligned with the ferrule 2' by the guide pins 3. And
Prior to the connector connection, the ferrule 2 'of each optical connector 1' is pressed by the pressing spring 7 in the housing 5 'and positioned at the distal end side (arrow a side) in the connector axial direction (FIGS. 7 to 7). 9), when the joint end faces 2′a of the ferrules 2 ′ abut against each other, each ferrule 2 ′ resists the reaction force of the pressing spring 7 to the back of the housing 5 ′ (the rear end side in the connector axial direction: The two optical connectors 1 which are pushed into the arrow b side and thereby engage with the adapter 10 are butt-connected with the joint end faces 2'a of the respective ferrules 2 'being subjected to a constant pressure by the pressing spring 7. Is done.

【0006】[0006]

【発明が解決しようとする課題】上記のように,アダプ
タ10を介して光コネクタ1’どうしを突き合わせ接続
した後,例えば図6に2点鎖線で示すように光ファイバ
心線12が側方に引っ張られる等して,光コネクタ1’
を側方に曲げようとする横向き力(矢印A方向の力)が
光コネクタ1’に作用した場合(いわゆるサイドプルが
発生),この横向き力がハウジング5’を介してフェル
ール2’に側圧として作用し,この側圧でフェルール
2’が僅かではあるが傾き,あるいは両フェルール2’
の接合端面2’a間の接触圧力に変化が生じる等して,
フェルール2’の接合端面2’aどうしの本来のPC接
続状態が損なわれ,挿入損失,反射減衰量等の接続特性
が劣化する恐れがある。
As described above, after the optical connectors 1 'are butt-connected to each other via the adapter 10, the optical fiber cores 12 are moved sideways as shown by two-dot chain lines in FIG. Optical connector 1 '
When a lateral force (a force in the direction of arrow A) that bends the optical connector 1 ′ acts on the optical connector 1 ′ (so-called side pull occurs), the lateral force acts as a lateral pressure on the ferrule 2 ′ via the housing 5 ′. However, at this side pressure, the ferrule 2 'is slightly inclined, or both ferrules 2' are inclined.
Changes in the contact pressure between the joining end surfaces 2'a of
The original PC connection state between the joint end surfaces 2'a of the ferrules 2 'may be damaged, and connection characteristics such as insertion loss and return loss may be deteriorated.

【0007】そこで,図10に示すように,ハウジング
5’内にフェルール2’の浮動を許容するクリアランス
14を形成して,光コネクタ1’に作用した横向き力が
ハウジング5’からフェルール2’に伝達されないよう
にすることが考えられる。しかし,ハウジング5’内に
単に図示のようなクリアランス14を設けた場合,フェ
ルール2’に側圧が作用するのを防止できても,こんど
は光コネクタ1’における(ハウジング5’における)
フェルール2’の支持位置が不安定になるため,アダプ
タ10内でフェルール2’どうしを接続する作業の際
に,相手側のフェルール2’のガイドピン穴に当該フェ
ルール2’のガイドピン3を差し込む作業がしにくくな
り,フェルール2’どうしの接続の作業性が低下すると
いう問題がある。
Therefore, as shown in FIG. 10, a clearance 14 is formed in the housing 5 'to allow the ferrule 2' to float, and a lateral force acting on the optical connector 1 'is applied from the housing 5' to the ferrule 2 '. It is conceivable to prevent transmission. However, if a clearance 14 as shown in the drawing is simply provided in the housing 5 ′, even if the lateral pressure can be prevented from acting on the ferrule 2 ′, the optical connector 1 ′ (in the housing 5 ′) can be prevented.
Since the supporting position of the ferrule 2 ′ becomes unstable, the guide pin 3 of the ferrule 2 ′ is inserted into the guide pin hole of the other ferrule 2 ′ when connecting the ferrules 2 ′ in the adapter 10. There is a problem that the work becomes difficult and the workability of the connection between the ferrules 2 'is reduced.

【0008】本発明は上記従来の欠点を解消するために
なされたもので,フェルールどうしを接続する前の,フ
ェルールがコネクタ軸方向先端側位置にある時は,フェ
ルールがハウジングの定位置に保持されるとともに,フ
ェルールがコネクタ軸方向後端側に押し込まれてフェル
ールどうしが接続状態となった時は,フェルールがハウ
ジング内で若干の浮動を許容されるようにすることによ
って,光コネクタ接続時の作業性を向上させることと,
コネクタ接続後の光コネクタに作用するサイドプルによ
る接続特性の劣化を防止することとの両者を共に満たす
ことのできる光コネクタを提供することを目的とする。
SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional drawbacks. When the ferrule is at a position on the distal end side in the connector axial direction before connecting the ferrules, the ferrule is held at a fixed position of the housing. In addition, when the ferrule is pushed into the rear end in the axial direction of the connector and the ferrules are connected to each other, the ferrule is allowed to float slightly in the housing, thereby reducing the work required when connecting the optical connector. To improve
It is an object of the present invention to provide an optical connector which can satisfy both of preventing deterioration of connection characteristics due to a side pull acting on the optical connector after connector connection.

【0009】[0009]

【課題を解決するための手段】上記課題を解決する請求
項1の発明は,光ファイバを挿通固定しコネクタ軸方向
先端側に接合端面を形成したフェルールと,概ね筒状を
なしその内部空間に前記フェルールをコネクタ軸方向に
移動可能に収容するハウジングと,前記フェルールをコ
ネクタ軸方向先端側に押圧する弾性部材とを備えるとと
もに,前記フェルールのコネクタ軸方向後端側に鍔部を
形成し,前記ハウジングの内部に,前記フェルールの鍔
部に係合することで当該フェルールのコネクタ軸方向先
端側への移動を規制しかつ当該フェルールを保持する位
置決め保持部を形成した光コネクタにおいて,前記フェ
ルールの鍔部に,ハウジングの位置決め保持部の周面部
と嵌合するコネクタ軸方向先端側の位置決め周面部と,
ハウジング内面との間のクリアランスが大きくなるよう
に逃がしたコネクタ軸方向後端側の逃げ周面部とを形成
するとともに,前記ハウジングの内部空間の位置決め保
持部よりコネクタ軸方向後端側の部分を,前記フェルー
ルの鍔部の位置決め周面部より大径に形成したことを特
徴とする。なお,上記において,周面部とは,コネクタ
軸方向と直交する面でなく,コネクタ軸方向に対して概
ね平行な面を指すものであり,必ずしも全周の面を意味
しない(請求項2,請求項3においても同じ)。
According to a first aspect of the present invention, there is provided a ferrule having an optical fiber inserted and fixed therein and having a joint end surface formed at a tip end side in a connector axial direction, and a ferrule having a substantially cylindrical shape and having an internal space. A housing for accommodating the ferrule movably in the connector axial direction, an elastic member for pressing the ferrule toward the connector axial front end, and a flange formed at the connector axial rear end of the ferrule; An optical connector having a positioning holding portion for holding the ferrule inside the housing by regulating the movement of the ferrule toward the distal end in the connector axial direction by engaging with the flange portion of the ferrule. A positioning peripheral surface on the distal end side in the connector axial direction to be fitted to the peripheral surface of the positioning holding portion of the housing;
A clearance peripheral surface portion on the rear side in the axial direction of the connector is formed so that the clearance between the housing and the inner surface of the housing is increased, and a portion on the rear side in the axial direction of the connector from the positioning and holding portion in the internal space of the housing is formed. The ferrule is formed to have a larger diameter than the positioning peripheral surface of the collar portion of the ferrule. In the above description, the term “peripheral surface portion” refers to a surface that is substantially parallel to the connector axial direction, not a surface that is orthogonal to the connector axial direction, and does not necessarily mean an entire peripheral surface. The same applies to item 3).

【0010】請求項2の発明は,フェルールの鍔部に,
ハウジングの位置決め保持部として形成されたコネクタ
軸方向後端側に広がるテーパ状の周面に面接触するコネ
クタ軸方向先端側のテーパ状の位置決め周面部と,平行
面状若しくは少なくとも前記テーパ状周面部の勾配より
小さな勾配のテーパ面状のコネクタ軸方向後端側の逃げ
周面部とを形成するとともに,前記ハウジングの内部空
間の位置決め保持部よりコネクタ軸方向後端側の部分
を,前記フェルールの鍔部の逃げ周面部より大径に形成
したことを特徴とする。
[0010] The invention according to claim 2 is characterized in that the ferrule of the ferrule has:
A tapered positioning peripheral surface portion on the distal end side in the connector axial direction that is in surface contact with a tapered peripheral surface formed on the rear end side in the axial direction of the connector formed as a positioning holding portion of the housing; and a parallel surface shape or at least the tapered peripheral surface portion And a flank peripheral surface on the rear end side in the axial direction of the connector having a tapered surface having a gradient smaller than that of the ferrule. It is characterized in that it is formed to have a larger diameter than the flank peripheral portion of the portion.

【0011】請求項3の発明の光コネクタは,フェルー
ルの鍔部のコネクタ軸方向の長さ寸法を0.5mm〜
1.2mmとし,かつ前記ハウジングの内部空間の位置
決め保持部よりコネクタ軸方向後端側の部分を,フェル
ールの鍔部より大径に形成したことを特徴とする。
According to a third aspect of the present invention, the length of the flange of the ferrule in the axial direction of the connector is 0.5 mm to 0.5 mm.
The diameter of the ferrule is 1.2 mm, and a portion of the inner space of the housing on the rear end side in the connector axial direction from the positioning holding portion is formed to have a larger diameter than the flange portion of the ferrule.

【0012】[0012]

【発明の実施の形態】以下,本発明の実施の形態を図1
〜図6を参照して説明する。以下に述べる本発明の各実
施例の光コネクタの外観は,本発明および従来例に概ね
共通する図6について先に説明した通りである。図4は
請求項1の発明の一実施例の光コネクタ21の一部を水
平断面で示した平面図である。図4に示された請求項1
の一実施例の光コネクタ21および後述する他の実施例
の光コネクタ,請求項2の光コネクタ,および請求項3
の光コネクタは,いずれも,フェルールとハウジングと
の嵌合構造以外の点では,図7で説明した従来の光コネ
クタ1’と基本的に同じである。したがって,図4にお
ける図7と共通する部分の再度の説明は省略し,図7と
異なる部分すなわちフェルールおよびハウジングの部分
について,以下に説明する。
FIG. 1 is a block diagram showing an embodiment of the present invention.
This will be described with reference to FIGS. The appearance of the optical connector of each embodiment of the present invention described below is as described above with reference to FIG. 6 which is generally common to the present invention and the conventional example. FIG. 4 is a plan view showing a part of the optical connector 21 according to the first embodiment of the present invention in a horizontal cross section. Claim 1 shown in FIG.
An optical connector 21 of one embodiment, an optical connector of another embodiment described later, an optical connector of claim 2, and an optical connector of claim 3.
These optical connectors are basically the same as the conventional optical connector 1 'described with reference to FIG. 7 except for the fitting structure between the ferrule and the housing. Therefore, the repetitive description of the parts in FIG. 4 common to FIG. 7 is omitted, and the parts different from FIG. 7, that is, the parts of the ferrule and the housing are described below.

【0013】図1は図4の光コネクタ21におけるフェ
ルール22およびハウジング25の部分を示したもの
で,(イ)はコネクタ接続前における水平断面図,
(ロ)はコネクタ接続前における垂直断面図,(ハ)は
コネクタ接続後における水平断面図,(ニ)はコネクタ
接続後における垂直断面図,(ホ)は図1(イ)の要部
拡大図,(ヘ)は後述のフェルール22の鍔部26の逃
げ周面部の変形例,(ト)は逃げ周面部のさらに他の変
形例,(チ)は逃げ周面部のさらに他の変形例である。
また,図5は図4の光コネクタ21におけるフェルール
22およびハウジング25の嵌合構造を説明するための
要部の一部切り欠き斜視図である。
FIG. 1 shows a ferrule 22 and a housing 25 in the optical connector 21 shown in FIG. 4. (A) is a horizontal sectional view before connection of the connector.
(B) is a vertical sectional view before connecting the connector, (c) is a horizontal sectional view after connecting the connector, (d) is a vertical sectional view after connecting the connector, and (e) is an enlarged view of a main part of FIG. (F) is a modified example of the flank peripheral surface of the flange portion 26 of the ferrule 22 described later, (g) is still another modified example of the flared peripheral surface, and (h) is still another modified example of the flared peripheral surface. .
FIG. 5 is a partially cutaway perspective view of a main part for describing a fitting structure of the ferrule 22 and the housing 25 in the optical connector 21 of FIG.

【0014】これらの図に示すように,この光コネクタ
21は,フェルール22のコネクタ軸方向後端側(矢印
b側)に鍔部26を形成し,ハウジング25の内部に,
フェルール22の鍔部26と係合することで当該フェル
ール22のコネクタ軸方向先端側への移動を規制しかつ
当該フェルールを保持する位置決め保持部29を形成し
ている。この光コネクタ21では,フェルール22の鍔
部26が,図1(ホ)に要部を拡大して示すように,ハ
ウジング25の位置決め保持部29の周面部29aと互
いに嵌合するコネクタ軸方向先端側の位置決め周面部2
6aと,ハウジング25の内面25aとの間のクリアラ
ンスが大きくなるようにテーパ状に逃がしたコネクタ軸
方向後端側の逃げ周面部26bとからなっている。な
お,上記において,ハウジング25の位置決め保持部2
9の周面部29aとフェルール22の鍔部26の位置決
め周面部26aとが「嵌合」するとは,必ずしも緊密に
接触嵌合することを意味しない。すなわち,フェルール
22の鍔部26の位置決め周面部26aとハウジング2
5の位置決め保持部29の周面部29aとは,コネクタ
接続時のフェルール22の位置決め容易性を高めるため
必要な範囲で,かつ,ガイドピン3によるフェルール2
2どうしの接続に支障ない範囲の嵌合状態(厳格すぎな
い嵌合状態)とする。なお,ハウジング25側の位置決
め保持部29は,コネクタ軸方向と直交する方向の位置
決めを行う前記の周面部29aと,フェルール22がコ
ネクタ軸方向先端側に移動するのを規制する側面部の垂
直壁29bとからなる。なお,図示例では,ハウジング
25の上下面には垂直壁は形成していない。また,ハウ
ジング25の内部空間23の前記位置決め保持部29よ
りコネクタ軸方向後端側の部分23aを,位置決め保持
部29の周面部29aより大径に形成(すなわち空間を
広く形成)して,ハウジング25の内面側にも逃げを形
成している。また,この実施例では,ハウジング25の
先端開口側(矢印a側)の内部空間23bを,上下面お
よび左右面とも先端側にテーパ状に広がるテーパ空間と
して,フェルール22の角形(直方体状)の主体部27
(鍔部26以外の部分)に対してテーパ状のクリアラン
スを設けている。このテーパ空間を設ける理由は,後述
のように,アダプタ10において接続された1対の光コ
ネクタ21の各フェルール22がそれぞれハウジング2
5内で容易に浮動できるようにするためである。このよ
うに,テーパ空間としたことでフェルール22とハウジ
ング25との間のクリアランスが大となり,フェルール
22がハウジング25内で容易に浮動できるため,サイ
ドプル特性が向上する。ただし,ハウジング25の先端
開口側の内部空間23bの内壁を,図示例のようなテー
パ面とせずに,均等なクリアランスを形成するような平
行面としてもよい。
As shown in these drawings, the optical connector 21 has a flange 26 formed on the rear end side (arrow b side) of the ferrule 22 in the connector axial direction.
By engaging with the flange 26 of the ferrule 22, a movement of the ferrule 22 toward the distal end in the connector axial direction is restricted, and a positioning holding portion 29 for holding the ferrule is formed. In this optical connector 21, as shown in FIG. 1E, the flange 26 of the ferrule 22 is fitted to the peripheral surface 29 a of the positioning holder 29 of the housing 25 in the axial direction of the connector. Side peripheral surface 2
6a and a clearance peripheral surface portion 26b on the rear end side in the connector axial direction which is tapered so as to increase the clearance between the inner surface 25a of the housing 25 and the inner surface 25a. In the above description, the positioning holding part 2 of the housing 25 is used.
The term “fitting” between the peripheral surface portion 29 a of the ferrule 22 and the positioning peripheral surface portion 26 a of the flange portion 26 of the ferrule 22 does not necessarily mean that the peripheral surface portion 29 a and the ferrule 22 are in tight contact with each other. That is, the positioning peripheral surface 26a of the flange 26 of the ferrule 22 and the housing 2
5 is a range necessary for enhancing the ease of positioning of the ferrule 22 at the time of connector connection, and the ferrule 2 by the guide pin 3.
A fitting state (a fitting state that is not too strict) within a range that does not interfere with the connection between the two. The positioning and holding portion 29 on the housing 25 side includes the peripheral surface portion 29a for positioning in a direction orthogonal to the connector axial direction, and a vertical wall of a side surface portion for restricting the movement of the ferrule 22 to the distal end side in the connector axial direction. 29b. In the illustrated example, no vertical wall is formed on the upper and lower surfaces of the housing 25. Further, a portion 23a of the inner space 23 of the housing 25 on the rear end side in the connector axial direction with respect to the positioning and holding portion 29 is formed to have a larger diameter than the peripheral surface portion 29a of the positioning and holding portion 29 (that is, to make the space wider). A relief is also formed on the inner surface side of 25. In this embodiment, the inner space 23b on the front end opening side (arrow a side) of the housing 25 is formed as a tapered space in which the upper and lower surfaces and the left and right surfaces are tapered toward the front end side. Main part 27
A tapered clearance is provided for (a part other than the flange 26). The reason for providing this tapered space is that each ferrule 22 of the pair of optical connectors 21 connected to the adapter 10
5 so that it can be easily floated. As described above, the taper space increases the clearance between the ferrule 22 and the housing 25, and the ferrule 22 can easily float within the housing 25, so that the side-pull characteristics are improved. However, the inner wall of the internal space 23b on the front end opening side of the housing 25 may not be a tapered surface as in the illustrated example, but may be a parallel surface that forms a uniform clearance.

【0015】上記のような光コネクタ21どうしを互い
に接続する場合,図6中の前述のアダプタ10に両側か
らそれぞれ光コネクタ21を差し込んで,それぞれのフ
ェルール22の接合端面22aを互いに突き合わせ接続
する。この場合,コネクタ接続前には,各光コネクタ2
1のフェルール22はそれぞれハウジング25内で押圧
バネ7により,鍔部26がハウジング25の位置決め保
持部29の垂直面29bに当たるまで押されて,コネク
タ軸方向先端側に位置している(図1(イ),(ロ)の
状態)が,この状態では,フェルール22の鍔部26の
位置決め周面部26aがハウジング25の位置決め保持
部29の周面部29aに嵌合しており,フェルール22
はハウジング25内で定位置に保持されているので,フ
ェルール22どうしを突き合わせ接続する作業の際に,
相手側のフェルール22のガイドピン穴に当該ガイドピ
ン3を差し込む作業は容易であり,フェルール22どう
しの突き合わせ接続の作業性は良好である。そして,互
いのフェルール22の接合端面22aどうしが突き当た
ると,各フェルール22は押圧バネ7の反力に抗してハ
ウジング25の奥方(コネクタ軸方向後端側:矢印b
側)に押し込まれ,それぞれのフェルール22の接合端
面22aどうしが押圧バネ7による一定の圧力を受けた
コネクタ接続状態となる(図1(ハ),(ニ)の状
態)。
When the optical connectors 21 are connected to each other as described above, the optical connectors 21 are inserted into the adapter 10 shown in FIG. 6 from both sides, and the joint end faces 22a of the ferrules 22 are butt-connected. In this case, before each connector is connected, each optical connector 2
The first ferrule 22 is pushed by the pressing spring 7 in the housing 25 until the flange 26 hits the vertical surface 29b of the positioning holding portion 29 of the housing 25, and is located at the distal end side in the connector axial direction (FIG. In this state, the positioning peripheral surface 26a of the flange portion 26 of the ferrule 22 is fitted to the peripheral surface 29a of the positioning holding portion 29 of the housing 25.
Is held in place in the housing 25, so that when the ferrules 22 are butt-connected,
The work of inserting the guide pin 3 into the guide pin hole of the other ferrule 22 is easy, and the workability of the butt connection of the ferrules 22 is good. When the joint end surfaces 22a of the ferrules 22 abut against each other, the ferrules 22 are opposed to the back of the housing 25 (rear end side in the connector axial direction: arrow b) against the reaction force of the pressing spring 7.
Side), and the joint end surfaces 22a of the ferrules 22 are brought into a connector connection state in which a constant pressure is applied by the pressing spring 7 (states of FIGS. 1 (c) and (d)).

【0016】コネクタ接続後に,光コネクタ21に横向
き力が作用(いわゆるサイドプル)した場合,従来構造
であれば,この横向き力がハウジング5’を介してフェ
ルール2’に側圧として作用する。しかし,本発明で
は,フェルール22がハウジング25の奥に押し込まれ
たコネクタ接続状態(図1(ハ),(ニ)の状態)で
は,鍔部26とハウジング25の内面25aとの間に十
分な逃げが形成されており,相互に干渉しないので,フ
ェルール22にハウジング25を介して側圧が作用する
ことを防止できる。したがって,光コネクタ21にサイ
ドプルが作用しても,フェルール22が傾いたり,両フ
ェルール22の接合端面22a間の接触圧力に変化が生
じる等の恐れはなく,フェルール22の接合端面22a
どうしの本来の接続状態が確保され,接続特性が劣化す
る恐れは少ない。
If a lateral force acts on the optical connector 21 after the connector is connected (so-called side pull), the lateral force acts on the ferrule 2 'via the housing 5' as a lateral pressure in the conventional structure. However, in the present invention, in the connector connection state in which the ferrule 22 is pushed into the back of the housing 25 (the state shown in FIGS. 1C and 1D), there is not enough space between the flange 26 and the inner surface 25a of the housing 25. Since the relief is formed and does not interfere with each other, it is possible to prevent the lateral pressure from acting on the ferrule 22 via the housing 25. Therefore, even if the side pull acts on the optical connector 21, there is no danger that the ferrule 22 is inclined or the contact pressure between the joint end faces 22 a of the two ferrules 22 does not change.
The original connection state between them is secured, and there is little possibility that the connection characteristics are degraded.

【0017】なお,上記の実施例では,フェルール22
の鍔部26の逃げ周面部26bはテーパ面により形成し
たが,図1(ヘ)のようにアール面により形成した逃げ
周面部26b1 でもよいし,図1(ト)のようにテーパ
面26’b2 とアール面26”b2 により形成した逃げ
周面部26b2 でもよいし,図1(ヘ)のように段差に
より形成した逃げ周面部26b3 でもよい。
In the above embodiment, the ferrule 22
While escape of the flange portion 26 peripheral surface 26b is formed by the tapered surface, may be the relief peripheral surface 26b 1 formed by curved surface as shown in FIG. 1 (f), the tapered surface 26 as shown in FIG. 1 (g) 'b 2 and curved surface 26 "may be the relief peripheral surface 26b 2 formed by b 2, it may be escaped peripheral surface 26b 3 formed by a step as shown in FIG. 1 (f).

【0018】図2に請求項2の一実施例の光コネクタ3
1の要部を示す。この光コネクタ31のフェルール32
およびハウジング35以外の構造は,前記光コネクタ2
1(図4の光コネクタ21)と同じである。図2は光コ
ネクタ31におけるフェルール32およびハウジング3
5の部分の水平断面図または垂直断面図を示すもので,
(イ)はコネクタ接続前における水平断面図,(ロ)は
コネクタ接続前における垂直断面図,(ハ)はコネクタ
接続後における水平断面図,(ニ)はコネクタ接続後に
おける垂直断面図である。この光コネクタ31では,フ
ェルール32の鍔部36の左右側面部(例えば図2
(イ)の上下両側の部分)に,ハウジング35の位置決
め保持部39として形成されたコネクタ軸方向後端側
(矢印b側)に広がるテーパ状の周面(すなわち39で
示した部分)に面接触するコネクタ軸方向先端側(矢印
a側)のテーパ状の位置決め周面部36aと,図示例で
は平行面状のコネクタ軸方向後端側の逃げ周面部36b
とを形成するとともに,前記ハウジング35の内部空間
33の位置決め保持部39よりコネクタ軸方向後端側の
部分33aを,前記フェルール32の鍔部36の逃げ周
面部36bより大径に形成している。内部空間33の位
置決め保持部39よりコネクタ軸方向前端側の部分33
bは,図1と同じくテーパ空間としている。なお,図示
例では,フェルール32の鍔部36の上下面は,テーパ
面のみを形成している。また,図示例の場合,フェルー
ル32の鍔部36の上下面はハウジング35と接触嵌合
はしない。
FIG. 2 shows an optical connector 3 according to an embodiment of the present invention.
1 shows an essential part. Ferrule 32 of this optical connector 31
The structure other than the optical connector 2 and the housing 35
1 (the optical connector 21 in FIG. 4). FIG. 2 shows the ferrule 32 and the housing 3 in the optical connector 31.
5 shows a horizontal sectional view or a vertical sectional view of the part 5,
(A) is a horizontal sectional view before connecting the connector, (B) is a vertical sectional view before connecting the connector, (C) is a horizontal sectional view after connecting the connector, and (D) is a vertical sectional view after connecting the connector. In this optical connector 31, left and right side surfaces of a flange 36 of a ferrule 32 (for example, FIG.
On both upper and lower parts of (a), a tapered peripheral surface (that is, a part indicated by 39) formed as a positioning holding part 39 of the housing 35 and extending toward the rear end side (arrow b side) in the connector axial direction. A tapered positioning peripheral surface portion 36a on the distal end side (arrow a side) of the connector in the contacting direction, and a clearance peripheral surface portion 36b on the rear end side in the connector axial direction having a parallel surface in the illustrated example.
And a portion 33a on the rear side in the connector axial direction from the positioning holding portion 39 of the internal space 33 of the housing 35 is formed to have a larger diameter than the clearance peripheral surface portion 36b of the flange portion 36 of the ferrule 32. . A portion 33 of the internal space 33 on the front end side in the connector axial direction from the positioning holding portion 39.
b is a tapered space as in FIG. In the illustrated example, the upper and lower surfaces of the flange 36 of the ferrule 32 form only a tapered surface. Further, in the case of the illustrated example, the upper and lower surfaces of the flange portion 36 of the ferrule 32 do not make contact with the housing 35.

【0019】この光コネクタ31によれば,ハウジング
35の位置決め保持部39がコネクタ軸方向後端側に広
がるテーパ面であるから,フェルール32がコネクタ軸
方向先端側にあるコネクタ接続前(図2(イ),
(ロ))には,フェルール32の鍔部36とハウジング
35の位置決め保持部39とが接触して,フェルール3
2がハウジング35内の定位置に保持される。そして,
フェルール32がハウジング35の奥方(コネクタ軸方
向後端側:矢印b側)に押し込まれてフェルール32ど
うしが接続状態となった時(図2(ハ),(ニ))は,
フェルール32の鍔部36(位置決め周面部36aおよ
び逃げ周面部36b)とハウジング35の内面35aと
の間のクリアランスが生じ,フェルール32はハウジン
グ35内で浮動を許容される。また,位置決め保持部3
9および鍔部36がテーパ面で接触するから,図2
(イ),(ロ)のようにフェルール32をハウジング3
5に嵌合させる際に,フェルール32の鍔部36のひっ
かかりによりフェルール32に傾きが生じることを防止
する作用も得られる。なお,図示例では,鍔部36の逃
げ周面部36bが平行面状であるが,図2(ホ)のよう
にテーパ状周面部36aの勾配より小さな勾配のテーパ
面状の逃げ周面部36’bであってもよい。これによっ
ても,ハウジング35の内面との間にクリアランスが生
じて,フェルール32の浮動を許容することができる。
According to the optical connector 31, since the positioning and holding portion 39 of the housing 35 has a tapered surface that extends toward the rear end in the axial direction of the connector, the ferrule 32 is connected to the front end in the axial direction of the connector (see FIG. I),
(B), the flange 36 of the ferrule 32 and the positioning and holding portion 39 of the housing 35 come into contact with each other,
2 is held in place in the housing 35. And
When the ferrule 32 is pushed into the back of the housing 35 (the rear end side in the connector axial direction: arrow b side) and the ferrules 32 are connected to each other (FIGS. 2C and 2D),
A clearance is generated between the flange portion 36 (the positioning peripheral surface portion 36a and the clearance peripheral surface portion 36b) of the ferrule 32 and the inner surface 35a of the housing 35, and the ferrule 32 is allowed to float within the housing 35. In addition, the positioning holding unit 3
9 and the flange 36 are in contact with each other on the tapered surface.
The ferrule 32 is connected to the housing 3 as shown in FIGS.
When the ferrule 32 is fitted to the ferrule 32, an effect of preventing the ferrule 32 from being inclined due to the catch of the flange portion 36 of the ferrule 32 can be obtained. In the illustrated example, the clearance peripheral surface portion 36b of the flange portion 36 has a parallel surface shape. However, as shown in FIG. 2 (e), the taper peripheral surface portion 36 'has a smaller gradient than the tapered peripheral surface portion 36a. b. Also with this, a clearance is generated between the inner surface of the housing 35 and the ferrule 32 can be allowed to float.

【0020】図3に請求項3の一実施例の光コネクタ4
1の要部を示す。この光コネクタ41のフェルール42
およびハウジング45以外の構造は,前記光コネクタ2
1(図4の光コネクタ21)と同じである。図3は光コ
ネクタ41におけるフェルール42およびハウジング4
5の部分の水平断面図または垂直断面図を示すもので,
(イ)はコネクタ接続前における水平断面図,(ロ)は
コネクタ接続前における垂直断面図,(ハ)はコネクタ
接続後における水平断面図,(ニ)はコネクタ接続後に
おける垂直断面図である。この光コネクタ41では,フ
ェルール42の鍔部46のコネクタ軸方向の長さ寸法s
を,0.5mm〜1.5mmとし,かつハウジング45
の内部空間43の位置決め保持部49よりコネクタ軸方
向後端側(矢印b側)の部分43aを,フェルール42
の鍔部46より大径に形成している。また,ハウジング
45の内部空間43の位置決め保持部49よりコネクタ
軸方向前端側の部分43bは,図1と同じくテーパ空間
としている。
FIG. 3 shows an optical connector 4 according to an embodiment of the present invention.
1 shows an essential part. Ferrule 42 of this optical connector 41
The structure other than the optical connector 2 and the housing 45
1 (the optical connector 21 in FIG. 4). FIG. 3 shows a ferrule 42 and a housing 4 in the optical connector 41.
5 shows a horizontal sectional view or a vertical sectional view of the part 5,
(A) is a horizontal sectional view before connecting the connector, (B) is a vertical sectional view before connecting the connector, (C) is a horizontal sectional view after connecting the connector, and (D) is a vertical sectional view after connecting the connector. In the optical connector 41, the length dimension s of the flange portion 46 of the ferrule 42 in the connector axial direction.
Is 0.5 mm to 1.5 mm, and the housing 45
The part 43a of the inner space 43 on the rear end side (arrow b side) in the connector axial direction with respect to the positioning holding part 49 is
Is formed to have a diameter larger than that of the flange 46. A portion 43b of the inner space 43 of the housing 45 on the front end side in the connector axial direction with respect to the positioning holding portion 49 is a tapered space as in FIG.

【0021】なお,従来の一般的なフェルールのサイズ
は,例えば,主体部47の長さ寸法(コネクタ軸方向の
長さ寸法)Lが6.0mm,幅寸法Wが6.4mm,高
さ寸法Hが2.5mmであり,鍔部46のコネクタ軸方
向の長さ寸法が2.0mm,幅寸法が7.0mm,高さ
寸法が3.0mmであるが,この発明では,上記の通
り,鍔部46のコネクタ軸方向の長さ寸法sを0.5〜
1.5mmと,従来の2.0mmよりかなり小さくす
る。また,この例では,フェルール42の主体部47の
高さ寸法Hも,2.4mmと,従来より若干小さくして
いる。
The size of the conventional general ferrule is, for example, that the length L (length in the connector axis direction) of the main body 47 is 6.0 mm, the width W is 6.4 mm, and the height is H is 2.5 mm, the length of the flange 46 in the connector axial direction is 2.0 mm, the width is 7.0 mm, and the height is 3.0 mm. The length dimension s of the flange 46 in the connector axial direction is 0.5 to
1.5 mm, which is considerably smaller than the conventional 2.0 mm. In this example, the height H of the main part 47 of the ferrule 42 is also 2.4 mm, which is slightly smaller than the conventional one.

【0022】この光コネクタ41によれば,フェルール
42がコネクタ軸方向先端側にあるコネクタ接続前(図
3(イ),(ロ))には,フェルール42の鍔部46と
ハウジング45の位置決め保持部49とが嵌合して,フ
ェルール42がハウジング45内の定位置に保持され
る。この場合,鍔部46のコネクタ軸方向の長さ寸法s
が小さいことは,位置決め上で特に不都合ない。そし
て,フェルール42がハウジング45の奥方(コネクタ
軸方向後端側:矢印b側)に押し込まれてフェルール4
2どうしが接続状態となった時(図3(ハ),(ニ))
は,フェルール42の鍔部46のコネクタ軸方向の長さ
寸法sが小さいので,鍔部46はハウジング45の内面
45aと干渉しにくい。このため,フェルール42はハ
ウジング45内で浮動を許容される。
According to the optical connector 41, before the connector is connected with the ferrule 42 at the distal end side in the axial direction of the connector (FIGS. 3A and 3B), the flange 46 of the ferrule 42 and the housing 45 are positioned and held. The ferrule 42 is held at a fixed position in the housing 45 by fitting with the portion 49. In this case, the length dimension s of the flange 46 in the connector axial direction
Is small is not particularly inconvenient in positioning. Then, the ferrule 42 is pushed into the back of the housing 45 (the rear end side in the connector axial direction: arrow b side),
When two are connected (Fig. 3 (c), (d))
Since the length dimension s of the flange 46 of the ferrule 42 in the connector axial direction is small, the flange 46 does not easily interfere with the inner surface 45 a of the housing 45. For this reason, the ferrule 42 is allowed to float within the housing 45.

【0023】なお,以上の実施例ではMPO形の光コネ
クタについて説明したが,本発明の構成はMPO以外の
形式の光コネクタ,例えばRJ方式の光コネクタにも適
用できる。RJ方式の光コネクタ(もしくはコネクタ)
は周知であるが,以下,簡単に説明すると,この光コネ
クタは,傾斜した弾性ツマミがコネクタボデイの側面に
形成され,当該弾性ツマミの一部は,アダプタと係合さ
れるべく係止部を有する。アダプタ結合時には,コネク
タを挿入するだけで係止部がアダプタ内の対応部分に入
り込んで,アダプタとコネクタとは結合位置が保持され
る。一方,アダプタとコネクタを離脱する場合は,前記
弾性ツマミを押し付けながらコネクタを引き抜くように
する。弾性ツマミをコネクタボディへ押し付けることに
より,弾性ツマミの一部とアダプタとの係合状態は解除
されるので,アダプタからのコネクタ引き離しが可能と
なる。RJ方式の光コネクタとは以上の機能を有する光
コネクタの総称である。
Although the above embodiment has been described with reference to the MPO type optical connector, the structure of the present invention can be applied to an optical connector of a type other than the MPO, for example, an RJ type optical connector. RJ optical connector (or connector)
Although the optical connector is well known, the optical connector will be briefly described below. In this optical connector, an inclined elastic knob is formed on a side surface of the connector body, and a part of the elastic knob has a locking portion to be engaged with the adapter. Have. At the time of coupling the adapter, only by inserting the connector, the engaging portion enters the corresponding portion in the adapter, and the coupling position between the adapter and the connector is maintained. On the other hand, when detaching the connector from the adapter, the connector is pulled out while pressing the elastic knob. By pressing the elastic knob against the connector body, a part of the elastic knob is disengaged from the adapter, so that the connector can be separated from the adapter. The RJ optical connector is a general term for optical connectors having the above functions.

【0024】[0024]

【発明の効果】本発明によれば,フェルールどうしを接
続する前の,フェルールがコネクタ軸方向先端側位置に
ある時は,フェルールがハウジングの定位置に保持され
るとともに,フェルールがコネクタ軸方向後端側に押し
込まれてフェルールどうしが接続状態となった時は,フ
ェルールがハウジング内で若干の浮動を許容されるの
で,光コネクタ接続時の作業性を向上させることと,コ
ネクタ接続後の光コネクタに作用するサイドプルによる
接続特性の劣化を防止することとの両者を共に満たすこ
とのできる光コネクタを得ることができた。
According to the present invention, before the ferrules are connected to each other, when the ferrule is at the distal end position in the axial direction of the connector, the ferrule is held at a fixed position of the housing, and the ferrule is moved rearward in the axial direction of the connector. When the ferrules are pushed into the ends and the ferrules are in a connected state, the ferrules are allowed to slightly float within the housing, so that the workability at the time of connecting the optical connector is improved, and the optical connector after the connector is connected. Thus, an optical connector that can satisfy both of the above and the problem of preventing the deterioration of the connection characteristics due to the side pull acting on the optical connector can be obtained.

【0025】すなわち,請求項1においては,フェルー
ルの鍔部にコネクタ軸方向先端側の位置決め周面部とコ
ネクタ軸方向後端側の逃げ周面部とが形成されているの
で,フェルールがコネクタ軸方向先端側にあるコネクタ
接続前には,フェルールの鍔部の位置決め周面部でフェ
ルールを定位置に保持することができ,フェルールがハ
ウジングの奥方(コネクタ軸方向後端側)に押し込まれ
たコネクタ接続後は,鍔部とハウジングの内面との間に
十分な逃げが形成され,フェルールの浮動が許容され
る。
That is, in the first aspect of the present invention, the ferrule is formed with the positioning peripheral surface portion on the front end side in the connector axial direction and the clearance peripheral surface portion on the rear end side in the connector axial direction. Before connecting the connector on the side, the ferrule can be held in place by the positioning peripheral surface of the flange of the ferrule, and after connecting the connector, the ferrule is pushed into the back of the housing (the rear end side in the connector axial direction). A sufficient clearance is formed between the flange and the inner surface of the housing to allow the ferrule to float.

【0026】請求項2の光コネクタにおいては,フェル
ールの鍔部とハウジングの位置決め保持部とがコネクタ
軸方向後端側に広がるテーパ面で接触するものであり,
かつ鍔部に逃げ周面部が形成されているので,コネクタ
接続前には,フェルールの鍔部のテーパ面(位置決め周
面部)でフェルールを定位置に保持することができ,コ
ネクタ接続後には,フェルールの鍔部とハウジングの内
面との間のクリアランスが生じ,フェルールはハウジン
グ内で浮動を許容される。
In the optical connector according to the present invention, the flange of the ferrule and the positioning and holding portion of the housing are in contact with each other on a tapered surface extending toward the rear end in the axial direction of the connector.
In addition, since the escape peripheral surface is formed in the flange, the ferrule can be held in a fixed position by the tapered surface (positioning peripheral surface) of the flange of the ferrule before connecting the connector. A clearance occurs between the flange of the housing and the inner surface of the housing, and the ferrule is allowed to float within the housing.

【0027】請求項3の光コネクタにおいては,フェル
ールの鍔部のコネクタ軸方向の長さ寸法sが小さいの
で,フェルールがハウジングの奥方(コネクタ軸方向後
端側)に押し込まれて接続状態となった時,鍔部はハウ
ジングの内面と干渉しにくく,フェルールはハウジング
内で浮動を許容される。なお,コネクタ接続前には長さ
寸法sが小さくてもこの鍔部でフェルールを定位置に保
持することができる。
In the optical connector according to the third aspect, since the length s of the flange portion of the ferrule in the connector axial direction is small, the ferrule is pushed into the rear of the housing (the rear end side in the connector axial direction) to be in a connected state. In this case, the flange does not easily interfere with the inner surface of the housing, and the ferrule is allowed to float inside the housing. Before the connector is connected, even if the length dimension s is small, the ferrule can be held at a fixed position by this flange portion.

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

【図1】(イ)〜(ホ)は請求項1の発明の一実施例の
光コネクタ(図4の光コネクタ)におけるフェルールお
よびハウジングの部分を示すもので,(イ)はコネクタ
接続前における水平断面図,(ロ)はコネクタ接続前に
おける垂直断面図,(ハ)はコネクタ接続後における水
平断面図,(ニ)はコネクタ接続後における垂直断面
図,(ホ)は図1(イ)のB部の拡大図である。(ヘ)
はフェルールの鍔部の逃げ周面部の変形例,(ト)は逃
げ周面部のさらに他の変形例,(チ)は逃げ周面部のさ
らに他の変形例である。
FIGS. 1A to 1E show a ferrule and a housing in an optical connector (optical connector of FIG. 4) according to an embodiment of the present invention, and FIG. The horizontal sectional view, (b) is a vertical sectional view before connecting the connector, (c) is a horizontal sectional view after connecting the connector, (d) is a vertical sectional view after connecting the connector, and (e) is FIG. It is an enlarged view of the B section. (F)
Is a modified example of the clearance peripheral surface of the flange of the ferrule, (g) is still another modified example of the clearance peripheral surface, and (h) is still another modified example of the clearance peripheral surface.

【図2】請求項2の発明の一実施例の光コネクタにおけ
るフェルールおよびハウジングの部分を示すもので,
(イ)はコネクタ接続前における水平断面図,(ロ)は
コネクタ接続前における垂直断面図,(ハ)はコネクタ
接続後における水平断面図,(ニ)はコネクタ接続後に
おける垂直断面図,(ホ)はフェルールの鍔部の逃げ周
面部についての変形例である。
FIG. 2 shows a ferrule and a housing in an optical connector according to an embodiment of the present invention;
(A) is a horizontal sectional view before connecting the connector, (b) is a vertical sectional view before connecting the connector, (c) is a horizontal sectional view after connecting the connector, (d) is a vertical sectional view after connecting the connector, (e) ) Is a modified example of the escape peripheral surface of the flange of the ferrule.

【図3】請求項3の発明の一実施例の光コネクタにおけ
るフェルールおよびハウジングの部分を示すもので,
(イ)はコネクタ接続前における水平断面図,(ロ)は
コネクタ接続前における垂直断面図,(ハ)はコネクタ
接続後における水平断面図,(ニ)はコネクタ接続後に
おける垂直断面図である。
FIG. 3 shows a ferrule and a housing in an optical connector according to an embodiment of the present invention;
(A) is a horizontal sectional view before connecting the connector, (B) is a vertical sectional view before connecting the connector, (C) is a horizontal sectional view after connecting the connector, and (D) is a vertical sectional view after connecting the connector.

【図4】請求項1の発明の一実施例の光コネクタの全体
構成を示すもので,一部を水平断面で示した平面図であ
る。
FIG. 4 is a plan view showing an entire configuration of the optical connector according to the first embodiment of the present invention, a part of which is shown in a horizontal section.

【図5】図4の光コネクタにおけるフェルールおよびハ
ウジングの部分の要部の一部切り欠き斜視図である。
FIG. 5 is a partially cutaway perspective view of a main part of a ferrule and a housing in the optical connector of FIG. 4;

【図6】本発明を適用しようとする光コネクタの外観お
よび概略構造を説明する斜視図であり,本発明および従
来例に共通する。
FIG. 6 is a perspective view illustrating an appearance and a schematic structure of an optical connector to which the present invention is applied, which is common to the present invention and a conventional example.

【図7】従来の光コネクタの一部を水平断面で示した平
面図である。
FIG. 7 is a plan view showing a part of a conventional optical connector in a horizontal section.

【図8】図7におけるフェルールおよびハウジングの部
分のみを示した図である。
FIG. 8 is a view showing only a ferrule and a housing in FIG. 7;

【図9】図8におけるA−A断面図である。FIG. 9 is a sectional view taken along line AA in FIG. 8;

【図10】従来の問題を解消するための1つの考え方を
説明するもので,図8に対応する図である。
FIG. 10 is a diagram for explaining one concept for solving the conventional problem and corresponding to FIG. 8;

【符号の説明】[Explanation of symbols]

10 アダプタ 11 ブーツ 12 光ファイバ心線(光ファイバテープ心線) 13 ピンクランプ 15 後部ハウジング 22,32,42 フェルール 22a,32a,42a 接合端面 23,33,43 ハウジングの内部空間 23a,33a,43a 内部空間の位置決め保持部よ
りコネクタ軸方向後端側の部分 23b,33b,43b 内部空間の位置決め保持部よ
りコネクタ軸方向前端側の部分 25,35,45 ハウジング 26,36,46 鍔部 26a,36a 位置決め周面部 26b,36b 逃げ周面部 27,37,47 主体部 29,39,49 位置決め保持部 29a 位置決め保持部の周面部 29b 垂直壁 矢印a コネクタ軸方向先端側 矢印b コネクタ軸方向後端側
DESCRIPTION OF SYMBOLS 10 Adapter 11 Boot 12 Optical fiber core fiber (optical fiber tape core) 13 Pink lamp 15 Rear housing 22, 32, 42 Ferrule 22a, 32a, 42a Joining end surface 23, 33, 43 Internal space of housing 23a, 33a, 43a Inside Portions 23b, 33b, 43b on the rear side in the connector axial direction from the positioning and holding portions of the space 23b, 33b, 43b Portions on the front end side in the connector axial direction from the positioning and holding portions in the internal space 25, 35, 45 Housings 26, 36, 46 Flanges 26a, 36a Peripheral surface 26b, 36b Relief peripheral surface 27, 37, 47 Main body 29, 39, 49 Positioning and holding portion 29a Peripheral surface of positioning and holding portion 29b Vertical wall Arrow a Connector axial direction front end Arrow b Connector axial direction rear end side

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 光ファイバを挿通固定しコネクタ軸方向
先端側に接合端面を形成したフェルールと,概ね筒状を
なしその内部空間に前記フェルールをコネクタ軸方向に
移動可能に収容するハウジングと,前記フェルールをコ
ネクタ軸方向先端側に押圧する弾性部材とを備えるとと
もに,前記フェルールのコネクタ軸方向後端側に鍔部を
形成し,前記ハウジングの内部に,前記フェルールの鍔
部に係合することで当該フェルールのコネクタ軸方向先
端側への移動を規制しかつ当該フェルールを保持する位
置決め保持部を形成した光コネクタにおいて,前記フェ
ルールの鍔部に,ハウジングの位置決め保持部の周面部
と嵌合するコネクタ軸方向先端側の位置決め周面部と,
ハウジング内面との間のクリアランスが大きくなるよう
に逃がしたコネクタ軸方向後端側の逃げ周面部とを形成
するとともに,前記ハウジングの内部空間の位置決め保
持部よりコネクタ軸方向後端側の部分を,前記フェルー
ルの鍔部の位置決め周面部より大径に形成したことを特
徴とする光コネクタ。
A ferrule having an optical fiber inserted and fixed therein and having a joint end surface formed at a distal end side in a connector axial direction; a housing having a substantially cylindrical shape and accommodating the ferrule in its internal space so as to be movable in the connector axial direction; An elastic member for pressing the ferrule toward the distal end of the connector in the axial direction of the connector; and a flange formed on the rear end of the ferrule in the axial direction of the connector, and engaged with the flange of the ferrule inside the housing. In an optical connector having a positioning and holding portion for restricting the movement of the ferrule toward the distal end in the axial direction of the connector and holding the ferrule, a connector fitted to a flange portion of the ferrule and a peripheral surface of the positioning and holding portion of the housing. The positioning peripheral surface on the axial front end side,
A clearance peripheral surface portion on the rear side in the axial direction of the connector is formed so that the clearance between the housing and the inner surface of the housing is increased, and a portion on the rear side in the axial direction of the connector from the positioning and holding portion in the internal space of the housing is formed. An optical connector characterized in that the ferrule is formed to have a larger diameter than a positioning peripheral surface of a flange portion of the ferrule.
【請求項2】 光ファイバを挿通固定しコネクタ軸方向
先端側に接合端面を形成したフェルールと,概ね筒状を
なしその内部空間に前記フェルールをコネクタ軸方向に
移動可能に収容するハウジングと,前記フェルールをコ
ネクタ軸方向先端側に押圧する弾性部材とを備えるとと
もに,前記フェルールのコネクタ軸方向後端側に鍔部を
形成し,前記ハウジングの内部に,前記フェルールの鍔
部に係合することで当該フェルールのコネクタ軸方向先
端側への移動を規制しかつ当該フェルールを保持する位
置決め保持部を形成した光コネクタにおいて,前記フェ
ルールの鍔部に,ハウジングの位置決め保持部として形
成されたコネクタ軸方向後端側に広がるテーパ状の周面
に面接触するコネクタ軸方向先端側のテーパ状の位置決
め周面部と,平行面状若しくは少なくとも前記テーパ状
周面部の勾配より小さな勾配のテーパ面状のコネクタ軸
方向後端側の逃げ周面部とを形成するとともに,前記ハ
ウジングの内部空間の位置決め保持部よりコネクタ軸方
向後端側の部分を,前記フェルールの鍔部の逃げ周面部
より大径に形成したことを特徴とする光コネクタ。
2. A ferrule having an optical fiber inserted and fixed therein and having a joint end face formed on the distal end side in the axial direction of the connector, a housing having a substantially cylindrical shape and accommodating the ferrule in its internal space movably in the axial direction of the connector, and An elastic member for pressing the ferrule toward the distal end of the connector in the axial direction of the connector; and a flange formed on the rear end of the ferrule in the axial direction of the connector, and engaged with the flange of the ferrule inside the housing. In an optical connector having a positioning and holding portion for restricting the movement of the ferrule to the distal end side in the connector axial direction and holding the ferrule, a rear end of the ferrule in a flange portion of the ferrule is formed as a positioning and holding portion for the housing. A tapered positioning peripheral surface on the distal end side in the connector axial direction that makes surface contact with the tapered peripheral surface that spreads to the end side, and a parallel surface And at least a clearance peripheral surface portion on the rear end side in the axial direction of the connector having a tapered surface shape having a gradient smaller than that of the tapered peripheral surface portion, and a rear end side in the connector axial direction from the positioning and holding portion in the internal space of the housing. An optical connector having a larger diameter than a clearance peripheral surface of a flange portion of the ferrule.
【請求項3】 光ファイバを挿通固定しコネクタ軸方向
先端側に接合端面を形成したフェルールと,概ね筒状を
なしその内部空間に前記フェルールをコネクタ軸方向に
移動可能に収容するハウジングと,前記フェルールをコ
ネクタ軸方向先端側に押圧する弾性部材とを備えるとと
もに,前記フェルールのコネクタ軸方向後端側に鍔部を
形成し,前記ハウジングの内部に,前記フェルールの鍔
部に係合することで当該フェルールのコネクタ軸方向先
端側への移動を規制しかつ当該フェルールを保持する位
置決め保持部を形成した光コネクタにおいて,前記フェ
ルールの鍔部のコネクタ軸方向の長さ寸法を0.5mm
〜1.2mmとし,かつ前記ハウジングの内部空間の位
置決め保持部よりコネクタ軸方向後端側の部分を,フェ
ルールの鍔部より大径に形成したことを特徴とする光コ
ネクタ。
3. A ferrule having an optical fiber inserted and fixed therein and having a joint end face formed on the distal end side in the axial direction of the connector, a housing having a substantially cylindrical shape and accommodating the ferrule in its internal space movably in the axial direction of the connector, An elastic member for pressing the ferrule toward the distal end of the connector in the axial direction of the connector; and a flange formed on the rear end of the ferrule in the axial direction of the connector, and engaged with the flange of the ferrule inside the housing. In an optical connector having a positioning and holding portion for restricting movement of the ferrule toward the distal end in the connector axial direction and holding the ferrule, the length of the flange portion of the ferrule in the connector axial direction is 0.5 mm.
An optical connector characterized by having a diameter of about 1.2 mm and a portion on the rear side in the axial direction of the connector from the positioning holding portion in the internal space of the housing having a diameter larger than that of a flange portion of a ferrule.
JP13124498A 1998-04-24 1998-04-24 Optical connector Expired - Fee Related JP3973177B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13124498A JP3973177B2 (en) 1998-04-24 1998-04-24 Optical connector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13124498A JP3973177B2 (en) 1998-04-24 1998-04-24 Optical connector

Publications (2)

Publication Number Publication Date
JPH11305073A true JPH11305073A (en) 1999-11-05
JP3973177B2 JP3973177B2 (en) 2007-09-12

Family

ID=15053383

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13124498A Expired - Fee Related JP3973177B2 (en) 1998-04-24 1998-04-24 Optical connector

Country Status (1)

Country Link
JP (1) JP3973177B2 (en)

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* Cited by examiner, † Cited by third party
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US7338088B2 (en) * 2001-10-19 2008-03-04 Ge Healthcare Bio-Sciences Ab Connector
WO2011087077A1 (en) * 2010-01-14 2011-07-21 株式会社フジクラ Optical connector and ferrule for optical connector
JP5860948B1 (en) * 2014-12-24 2016-02-16 日本航空電子工業株式会社 Plug with built-in connector
US9927583B2 (en) 2010-01-14 2018-03-27 Fujikura Ltd. Optical connector and optical connector ferrule

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7338088B2 (en) * 2001-10-19 2008-03-04 Ge Healthcare Bio-Sciences Ab Connector
US7472928B2 (en) 2001-10-19 2009-01-06 Ge Healthcare Bio-Sciences Ab Connector
WO2011087077A1 (en) * 2010-01-14 2011-07-21 株式会社フジクラ Optical connector and ferrule for optical connector
US9927583B2 (en) 2010-01-14 2018-03-27 Fujikura Ltd. Optical connector and optical connector ferrule
JP5860948B1 (en) * 2014-12-24 2016-02-16 日本航空電子工業株式会社 Plug with built-in connector
WO2016103821A1 (en) * 2014-12-24 2016-06-30 日本航空電子工業株式会社 Plug with built-in connector
US10067300B2 (en) 2014-12-24 2018-09-04 Japan Aviation Electronics Industry, Limited Connector-equipped plug

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