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JP2008122728A - Optical connector - Google Patents

  • ️Thu May 29 2008

JP2008122728A - Optical connector - Google Patents

Optical connector Download PDF

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Publication number
JP2008122728A
JP2008122728A JP2006307355A JP2006307355A JP2008122728A JP 2008122728 A JP2008122728 A JP 2008122728A JP 2006307355 A JP2006307355 A JP 2006307355A JP 2006307355 A JP2006307355 A JP 2006307355A JP 2008122728 A JP2008122728 A JP 2008122728A Authority
JP
Japan
Prior art keywords
optical
spring
connector
optical fiber
ferrule
Prior art date
2006-11-14
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
JP2006307355A
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Japanese (ja)
Other versions
JP4799375B2 (en
Inventor
Takaaki Ishikawa
隆朗 石川
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.)
2006-11-14
Filing date
2006-11-14
Publication date
2008-05-29
2006-11-14 Application filed by Fujikura Ltd filed Critical Fujikura Ltd
2006-11-14 Priority to JP2006307355A priority Critical patent/JP4799375B2/en
2008-05-29 Publication of JP2008122728A publication Critical patent/JP2008122728A/en
2011-10-26 Application granted granted Critical
2011-10-26 Publication of JP4799375B2 publication Critical patent/JP4799375B2/en
Status Active legal-status Critical Current
2026-11-14 Anticipated expiration legal-status Critical

Links

  • 230000003287 optical effect Effects 0.000 title claims abstract description 83
  • 239000013307 optical fiber Substances 0.000 claims abstract description 60
  • 230000037431 insertion Effects 0.000 claims description 11
  • 238000003780 insertion Methods 0.000 claims description 11
  • 238000006243 chemical reaction Methods 0.000 claims description 9
  • 230000008030 elimination Effects 0.000 abstract 1
  • 238000003379 elimination reaction Methods 0.000 abstract 1
  • 230000000414 obstructive effect Effects 0.000 abstract 1
  • 210000000078 claw Anatomy 0.000 description 8
  • 230000008878 coupling Effects 0.000 description 6
  • 238000010168 coupling process Methods 0.000 description 6
  • 238000005859 coupling reaction Methods 0.000 description 6
  • 239000000835 fiber Substances 0.000 description 6
  • 239000011248 coating agent Substances 0.000 description 5
  • 238000000576 coating method Methods 0.000 description 5
  • 239000011347 resin Substances 0.000 description 4
  • 229920005989 resin Polymers 0.000 description 4
  • 239000000853 adhesive Substances 0.000 description 2
  • 230000001070 adhesive effect Effects 0.000 description 2
  • 239000000463 material Substances 0.000 description 2
  • 230000002093 peripheral effect Effects 0.000 description 2
  • 229920001707 polybutylene terephthalate Polymers 0.000 description 2
  • 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
  • 235000017491 Bambusa tulda Nutrition 0.000 description 1
  • 241001330002 Bambuseae Species 0.000 description 1
  • 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
  • 239000011425 bamboo Substances 0.000 description 1
  • 230000013011 mating Effects 0.000 description 1
  • 238000005498 polishing Methods 0.000 description 1
  • -1 polybutylene terephthalate Polymers 0.000 description 1
  • 239000007787 solid Substances 0.000 description 1

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  • Mechanical Coupling Of Light Guides (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To facilitate terminating operation of an optical ferrule in assembling an optical connector. <P>SOLUTION: The optical connector has such structure that an optical ferrule and a coil spring for pressing the optical ferrule forward is housed in the connector housing, and a repulsive force of the coil spring is received with a spring push 5 attached to the rear end of the connector housing. The spring push 5 is bisected into two halves 15. Since the spring push 5 is not unified but bisected, it can be put on an optical fiber after the optical fiber is mounted with the optical ferrule and terminated in assembling the optical connector. The terminating operation of the optical ferrule is facilitated by the elimination of the spring push obstructive to the operation. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

この発明は、光フェルールを付勢するコイルスプリング及びこのコイルスプリングの反力を受け止めるスプリング押しを備えた光コネクタに関して、特にスプリング押しに関する。   The present invention relates to an optical connector including a coil spring that urges an optical ferrule and a spring push that receives a reaction force of the coil spring, and more particularly to a spring push.

光フェルールを付勢するコイルスプリング及びこのコイルスプリングの反力を受け止めるスプリング押しを備えた光コネクタとして、JIS C 5982に規定されるF13形多心光ファイバコネクタ、いわゆるMPO光コネクタがある。図9〜図11にこの種の従来の光コネクタ(MPO光コネクタ)51を示す。
この光コネクタ51は、コネクタハウジング52内に、光ファイバの先端部を挿通固定し成端した光フェルール53、及び、この光フェルール53を前方に付勢するコイルスプリング54を収容し、前記コネクタハウジング52の後端側にスプリング押し55を取り付けて、このスプリング押し55で前記コイルスプリング54の反力を受けるようにし、コネクタハウジング52の外周に、コネクタ接続部材であるアダプタ50に対する着脱のためのカップリング56をカップリング用スプリング57とともに装着し、前記スプリング押し55の後部に光ファイバコード(図示例では光ファイバテープ)58のコネクタ口部近傍を保護するゴムブーツ59を取り付けた基本構造を持つ(特許文献1)。58aは光ファイバコード58の被覆を除去した光ファイバ素線部分(複数本の光ファイバ素線が密着してテープ状をなしている部分(素線部と呼ぶ))、58bは光ファイバコード58の被覆部(コード部)を示す。各光ファイバ素線は、裸ファイバに一次被覆を施したもので、例えば外径が0.25mmである。
この光コネクタ51を図11に示すアダプタ50に嵌入すると、このアダプタ50に反対側から嵌入した相手側光コネクタ(不図示)と光フェルール53どうしが突き合わされて、光ファイバどうしが光接続される。
As an optical connector provided with a coil spring for energizing an optical ferrule and a spring push for receiving a reaction force of the coil spring, there is an F13 type multi-fiber optical fiber connector defined in JIS C 5982, a so-called MPO optical connector. 9 to 11 show a conventional optical connector (MPO optical connector) 51 of this type.
The optical connector 51 accommodates in the connector housing 52 an optical ferrule 53 inserted and fixed at the tip end of the optical fiber, and a coil spring 54 for urging the optical ferrule 53 forward. A spring push 55 is attached to the rear end side of the pin 52 so that the spring push 55 receives the reaction force of the coil spring 54, and a cup for attaching / detaching to the adapter 50 which is a connector connecting member is provided on the outer periphery of the connector housing 52. A ring 56 is mounted together with a coupling spring 57, and a rubber boot 59 for protecting the vicinity of the connector opening of an optical fiber cord (optical fiber tape in the illustrated example) 58 is attached to the rear of the spring push 55 (patent) Reference 1). 58a is an optical fiber strand portion from which the coating of the optical fiber cord 58 has been removed (a portion where a plurality of optical fiber strands are in close contact with each other to form a tape (referred to as a strand portion)), and 58b is an optical fiber cord 58. The coating | coated part (code | cord | chord part) is shown. Each optical fiber is a bare fiber with a primary coating, and has an outer diameter of 0.25 mm, for example.
When this optical connector 51 is inserted into the adapter 50 shown in FIG. 11, the other-side optical connector (not shown) inserted into this adapter 50 from the opposite side and the optical ferrule 53 are abutted, and the optical fibers are optically connected. .

スプリング押し55は、図10にも斜視図で示すように、光ファイバを通す光ファイバ挿通用貫通穴55a及びコイルスプリング54の反力を受けるスプリング受け部55bを持ち、コネクタハウジング52の係合穴52aと係合する係合爪55cを持つ樹脂成形品であるが、従来のスプリング押し55は、同図に示す通り、一体ものであった。
特開2002−148485
As shown in the perspective view of FIG. 10, the spring push 55 has an optical fiber insertion through hole 55 a through which an optical fiber passes and a spring receiving portion 55 b that receives a reaction force of the coil spring 54. Although it is a resin molded product having an engaging claw 55c that engages with 52a, the conventional spring push 55 is integrated as shown in FIG.
JP2002-148485

光コネクタ51の組み立てに際しては、光ファイバの先端に光フェルール53を取り付けその端面を研磨しておくが、その際、予め、光ファイバを複数の部品の内側に通しておく必要がある。すなわち、光ファイバをゴムブーツ59、スプリング押し55、コイルスプリング54の内側に通す必要がある。   When assembling the optical connector 51, the optical ferrule 53 is attached to the tip of the optical fiber and the end face thereof is polished. At that time, it is necessary to pass the optical fiber through a plurality of parts in advance. That is, it is necessary to pass the optical fiber inside the rubber boot 59, the spring push 55, and the coil spring 54.

これら部品の中で、特にスプリング押し55は、光ファイバ挿通用貫通穴55aの内径が光ファイバコード58の素線部58aを通す程度であり、被覆部(コード部)58bを通す余裕はない。なお、コード幅方向が示される図9の平面断面図では余裕があるが、コード厚み方向(光ファイバテープ厚み方向)には余裕がない。   Among these components, in particular, the spring push 55 is such that the inner diameter of the through hole 55a for inserting the optical fiber passes through the strand portion 58a of the optical fiber cord 58, and there is no room for passing the covering portion (cord portion) 58b. In addition, although there is a margin in the plan sectional view of FIG. 9 in which the cord width direction is shown, there is no margin in the cord thickness direction (optical fiber tape thickness direction).

一方、コード口出し長は規定されており素線部58aの長さが一定長さ以下となって充分な余長を確保できないので、素線部58aに被せたスプリング54及びスプリング押し55は、光フェルール53の後端面から充分に引き離すことができず、近接した位置に存在することになる。
その結果、光フェルール53の成端作業時に、素線部58aに被せたスプリング押し55が作業の障害になるという問題があった。なお、スプリング54も同様に作業上の障害にはなるが、伸縮、屈曲自在であるため、スプリング押し55のような障害にはならない。ここで、光フェルールの成端作業とは、光ファイバの先端に光フェルールを取り付けその端面を研磨する作業を指している。
On the other hand, since the length of the cord lead is defined and the length of the strand portion 58a is less than a certain length and a sufficient surplus length cannot be ensured, the spring 54 and the spring push 55 placed on the strand portion 58a are It cannot be sufficiently separated from the rear end face of the ferrule 53, and is present in a close position.
As a result, when the optical ferrule 53 is terminated, there is a problem that the spring push 55 placed on the wire portion 58a becomes an obstacle to the operation. The spring 54 similarly becomes an obstacle in work, but does not become an obstacle like the spring push 55 because it can expand and contract and bend freely. Here, the termination of the optical ferrule refers to an operation of attaching the optical ferrule to the tip of the optical fiber and polishing the end face thereof.

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、光フェルールを付勢するコイルスプリング及びこのコイルスプリングの反力を受け止めるスプリング押しを備えた光コネクタにおいて、光コネクタ組立ての際の光フェルールの成端作業を容易にすることを目的とする。   The present invention has been made in order to eliminate the above-described conventional drawbacks. An optical connector having a coil spring for biasing an optical ferrule and a spring push for receiving a reaction force of the coil spring is provided. The purpose is to facilitate the termination of ferrules.

上記課題を解決する本発明は、コネクタハウジング内に光フェルール及びこの光フェルールを前方に付勢するコイルスプリングを収容し、前記コネクタハウジングの後端側に取り付けた、光ファイバ挿通用貫通穴及びスプリング受け部を持つスプリング押しで、前記コイルスプリングの反力を受けるようにした光コネクタにおいて、
前記スプリング押しを、組み合わせた時に光ファイバ挿通用貫通穴及びスプリング受け部を形成する2つの半体で構成したことを特徴とする。
The present invention that solves the above-described problems includes an optical fiber insertion through hole and a spring that house an optical ferrule and a coil spring that urges the optical ferrule forward in the connector housing, and are attached to the rear end side of the connector housing. In an optical connector adapted to receive the reaction force of the coil spring by a spring push having a receiving portion,
The spring pusher is composed of two halves that, when combined, form an optical fiber insertion through hole and a spring receiving portion.

請求項2は、請求項1の光コネクタにおいて、2つの半体のうちの一方の半体の接合面に係合突起、他方の半体の接合面に前記係合突起が嵌合する係合凹所を設けたことを特徴とする。   According to a second aspect of the present invention, in the optical connector according to the first aspect, the engagement protrusion is fitted to the joint surface of one half of the two halves, and the engagement protrusion is fitted to the joint surface of the other half. It is characterized by providing a recess.

本発明の光コネクタによれば、スプリング押しが、一体ものではなく、組み合わせた時に光ファイバ挿通用貫通穴及びスプリング受け部を形成するような2つの半体からなるので、光ファイバの先端に光フェルールを取り付けこれを成端した後に、光ファイバにスプリング押しを被せることができる。したがって、光フェルールの成端作業の際には、作業に邪魔なスプリング押しがない状態で作業することができ、光フェルールの成端作業が容易になる。   According to the optical connector of the present invention, the spring push is not integrated, but is composed of two halves that form an optical fiber insertion through hole and a spring receiving portion when combined. After attaching the ferrule and terminating it, the optical fiber can be spring loaded. Accordingly, when the optical ferrule is terminated, the optical ferrule can be terminated easily without the spring being disturbed by the work.

請求項2の光コネクタによれば、一方の半体の接合面の係合突起を他方の半体の接合面の係合凹所に嵌合させて、両者を互いに結合させることができるので、2つの半体からなるスプリング押しの組立作業は極めて容易である。   According to the optical connector of the second aspect, since the engagement protrusion of the joining surface of one half can be fitted into the engaging recess of the joining surface of the other half, both can be coupled to each other. The assembly of the spring halves consisting of two halves is very easy.

以下、本発明を実施した光コネクタについて、図1〜図8を参照して説明する。   Hereinafter, an optical connector embodying the present invention will be described with reference to FIGS.

図1は本発明の一実施例の光コネクタ1の平面断面図である。この光コネクタ1は、JIS C 5982に規定されるF13形多心光ファイバコネクタ、いわゆるMPO光コネクタに概ね相当するもので、コネクタハウジング2内に、光ファイバの先端部を挿通固定し成端した光フェルール3、及び、この光フェルール3を前方に付勢するコイルスプリング4を収容し、前記コネクタハウジング2の後端側にスプリング押し5を取り付けて、このスプリング押し5で前記コイルスプリング4の反力を受けるようにし、コネクタハウジング2の外周に、コネクタ接続部材であるアダプタ(図11の符号50と同様のもの)に対する着脱のためのカップリング6をカップリング用スプリング7とともに装着し、前記スプリング押し5の後部に光ファイバコード(図示例では光ファイバテープ)8のコネクタ口部近傍を保護するゴムブーツ9を取り付けた基本構造を持つ。8aは光ファイバコード8の被覆を除去した光ファイバ素線部分(複数本の光ファイバ素線が密着してテープ状をなしている部分(素線部と呼ぶ))、8bは光ファイバコード8の被覆部(コード部)を示す。
この光コネクタ1を図11に示したアダプタ50と同様なアダプタに嵌入すると、カップリング6が後退しコネクタハウジング2の係合凹所2cがアダプタ側の係合爪と係合してアダプタに装着され、このアダプタに反対側から嵌入した相手側光コネクタと光フェルール3どうしが突き合わされて、光ファイバどうしが光接続される。
FIG. 1 is a plan sectional view of an optical connector 1 according to an embodiment of the present invention. This optical connector 1 is roughly equivalent to an F13 type multi-core optical fiber connector defined in JIS C 5982, a so-called MPO optical connector, and is terminated by inserting and fixing the tip of the optical fiber in the connector housing 2. An optical ferrule 3 and a coil spring 4 that urges the optical ferrule 3 forward are accommodated, a spring push 5 is attached to the rear end side of the connector housing 2, and the spring push 5 counteracts the coil spring 4. A coupling 6 for attaching / detaching to / from an adapter (similar to reference numeral 50 in FIG. 11), which is a connector connecting member, is mounted on the outer periphery of the connector housing 2 together with a coupling spring 7. Protects the vicinity of the connector opening of the optical fiber cord (optical fiber tape in the illustrated example) 8 at the rear of the push 5 It has a basic structure with rubber boots 9 attached. 8a is an optical fiber strand portion from which the coating of the optical fiber cord 8 is removed (a portion where a plurality of optical fiber strands are in close contact with each other to form a tape (referred to as a strand portion)), and 8b is an optical fiber cord 8 The coating | coated part (code | cord | chord part) is shown.
When this optical connector 1 is inserted into an adapter similar to the adapter 50 shown in FIG. 11, the coupling 6 is retracted, and the engagement recess 2c of the connector housing 2 is engaged with the engagement claw on the adapter side and attached to the adapter. The mating optical connector fitted into the adapter from the opposite side and the optical ferrule 3 are brought into contact with each other, and the optical fibers are optically connected.

スプリング押し5の詳細構造を図2〜図8を参照して説明する。このスプリング押し5は2つの半体15に分割されている。半体15は例えばPBT(ポリブチレンテレフタレート)等の樹脂成形品である。その2つの半体15を互いに向かい合わせて突き合わせた時に、図2に示すようなスプリング押しの構造となる。すなわち、2つの半体15を組み合わせて構成したスプリング押し5は、光ファイバを通す光ファイバ挿通用貫通穴16及びコイルスプリング4の反力を受けるスプリング受け部17を持ち、さらに、コネクタハウジング2の係合穴2aと係合する係合爪18を持っている。係合爪18は、スプリング押し5の基部20の前方側に延出するコネクタ幅方向両側(図1で上下両側)の1対のアーム部21のそれぞれ先端の外側面に形成されている。基部20の後方側には長円形筒状のゴムブーツ取付部22が形成されており、基部20及びゴムブーツ取付部22の内部が光ファイバ挿通用貫通穴16となっている。基部20は、コネクタ幅方向(1対のアーム部21が対向する方向)の両側に突出部20aを持ち、この突出部20aはコネクタハウジング2の後端部に形成した段差状拡径部2dの内側に収まり、この突出部20aと段差状拡径部2dとの係合及び前記係合爪18と係合穴2aとの係合によって、コネクタハウジング2の後端側に固定されている。基部20の前端面がスプリング受け部17となっている。基部20の中央部20bの外周は湾曲面となっている。ゴムブーツ取付部22の外周面は、これに被せたゴムブーツ9がみだりに外れないための複数の周溝22aが形成されたタケノコジョイントタイプとなっている。一方、ゴムブーツ9は一般的なゴムブーツと比べて細型であり、また、柔軟に屈曲できるように周方向に延びる細い長穴9aを形成している。
23はピンクランプであり、光フェルール3の後端部に取り付けられてガイドピン24を保持している。
The detailed structure of the spring push 5 will be described with reference to FIGS. This spring push 5 is divided into two halves 15. The half body 15 is a resin molded product such as PBT (polybutylene terephthalate). When the two halves 15 are faced to each other, a spring-pressing structure as shown in FIG. 2 is obtained. That is, the spring push 5 constituted by combining two halves 15 has an optical fiber insertion through hole 16 through which an optical fiber passes and a spring receiving portion 17 that receives a reaction force of the coil spring 4. The engaging claw 18 is engaged with the engaging hole 2a. The engaging claws 18 are formed on the outer surfaces of the distal ends of the pair of arm portions 21 on both sides in the connector width direction (upper and lower sides in FIG. 1) extending to the front side of the base portion 20 of the spring push 5. An oval cylindrical rubber boot attachment portion 22 is formed on the rear side of the base portion 20, and the inside of the base portion 20 and the rubber boot attachment portion 22 is an optical fiber insertion through hole 16. The base portion 20 has projecting portions 20a on both sides in the connector width direction (the direction in which the pair of arm portions 21 face each other), and the projecting portion 20a is a step-shaped enlarged diameter portion 2d formed at the rear end portion of the connector housing 2. The connector housing 2 is fixed to the rear end side of the connector housing 2 by being engaged with the protrusion 20a and the stepped diameter-increased portion 2d and with the engagement claw 18 and the engagement hole 2a. The front end surface of the base portion 20 is a spring receiving portion 17. The outer periphery of the central portion 20b of the base portion 20 is a curved surface. The outer peripheral surface of the rubber boot mounting portion 22 is a bamboo shoot joint type in which a plurality of peripheral grooves 22a are formed so that the rubber boot 9 placed on the rubber boot mounting portion 22 is not removed. On the other hand, the rubber boot 9 is narrower than a general rubber boot, and has a narrow elongated hole 9a extending in the circumferential direction so as to be flexibly bent.
Reference numeral 23 denotes a pin clamp, which is attached to the rear end portion of the optical ferrule 3 and holds the guide pin 24.

前述ではスプリング押し5の構造を、既に2つの半体15を組み立てた状態として説明したが、各半体15は互いに組み合わせた時にそのような構造となる片側部分である。すなわち、各半体15はそれぞれ、基部20の片側部分20’、片側の突出部20a、中央部20bの片側部分20b’、スプリング受け部17の片側部分17’、一方の係合爪18を持つ片側のアーム部21、ゴムブーツ取付部22の片側部分22’を備えており、また、基部20の片側部分20’及びゴムブーツ取付部22の片側部分22’には、光ファイバ挿通用貫通穴16の片側部分を形成する半長円状の凹所16’が形成されている。
さらに、各半体15の基部片側部分20’の接合面20”における、半長円状凹所16’を挟む片側の面に2つの係合突起26、反対側の面に2つの係合穴27がそれぞれ形成されている。両半体15を互いに対向させて突き合わせた時、一方の半体15の係合突起26が他方の半体15の係合穴27に嵌入して、両半体15が結合し、互いに固定される。なお、接合面20”に接着剤を塗布してさらに堅固に固定するようにしてもよい。また、接合面20”を、係合突起26及び係合穴27等の構造的な接合手段を持たない単なる平坦面として、単に接着剤で接合してもよい。
In the above description, the structure of the spring pusher 5 has been described as a state in which two halves 15 have already been assembled. However, each half 15 is a one-side portion that becomes such a structure when combined with each other. That is, each half 15 has one side portion 20 ′ of the base portion 20, one side protruding portion 20 a, one side portion 20 b ′ of the central portion 20 b, one side portion 17 ′ of the spring receiving portion 17, and one engaging claw 18. The arm portion 21 on one side and the one side portion 22 ′ of the rubber boot mounting portion 22 are provided. The one side portion 20 ′ of the base portion 20 and the one side portion 22 ′ of the rubber boot mounting portion 22 are provided with optical fiber insertion through holes 16. A semi-oval recess 16 ′ that forms one side portion is formed.
Further, in the joint surface 20 ″ of the base one side portion 20 ′ of each half body 15, two engagement protrusions 26 are provided on one side of the semi-oval recess 16 ′, and two engagement holes are provided on the opposite side. 27. When the two halves 15 are abutted against each other, the engaging projections 26 of one half 15 are fitted into the engaging holes 27 of the other half 15, and both halves 15 are bonded to each other and fixed to each other. Note that an adhesive may be applied to the bonding surface 20 ″ to fix the bonding surface more firmly. Further, the joining surface 20 ″ may be simply joined with an adhesive as a simple flat surface without structural joining means such as the engaging protrusion 26 and the engaging hole 27.

上記の光コネクタ1を組み立てる場合、予め、光ファイバをゴムブーツ9、コイルスプリング4の内側に通した状態で光ファイバの先端に光フェルール3を取り付ける。従来は、その際にスプリング押しにも光ファイバを通しておく必要があったが、本発明では、後述のように、光フェルール3の成端後にスプリング押し5を光ファイバに被せることができるので、それが不要となる。   When the optical connector 1 is assembled, the optical ferrule 3 is attached to the tip of the optical fiber in a state where the optical fiber is passed through the rubber boot 9 and the coil spring 4 in advance. Conventionally, it has been necessary to pass the optical fiber through the spring push at that time, but in the present invention, the spring push 5 can be put on the optical fiber after the optical ferrule 3 is terminated as described later. Is no longer necessary.

次いで、光フェルール3の端面を研磨するが、光ファイバに光フェルール3を取り付けその光フェルール3の端面研磨をするまでの光フェルール成端作業において、スプリング押し5が光ファイバに被せられていないので、光フェルール成端作業が著しく容易である。
すなわち、スプリング押し5は、光ファイバ挿通用貫通穴16の内径が光ファイバコード8の素線部8aを通す程度であり、被覆部(コード部)8bを通す余裕はないが、一方で、コード口出し長は規定されており素線部8aの長さが一定長さ以下となり充分な余長を確保できないので、従来のように素線部8aにスプリング押しを被せていた場合、これを光フェルール3の後端面から充分に引き離すことができず、近接した位置に存在することになる。その結果、光フェルール3の成端作業時に、素線部8aに通されているスプリング押しが作業の障害になる。
しかし、上記の光コネクタ1によれば、スプリング押し5が2分割されているので、上記の通り、光ファイバの先端に光フェルールを取り付けこれを成端した後に、光ファイバ(素線部8a)に被せることができる。したがって、光フェルールの成端作業の際には、作業に邪魔なスプリング押しがない状態で作業することができ、光フェルールの成端作業が容易になる。なお、スプリング4も同様に作業上の障害にはなるが、伸縮、屈曲自在であるため、スプリング押しのような大きな障害にはならない。
Next, the end face of the optical ferrule 3 is polished, but in the optical ferrule termination work until the optical ferrule 3 is attached to the optical fiber and the end face of the optical ferrule 3 is polished, the spring push 5 is not covered with the optical fiber. The optical ferrule termination work is remarkably easy.
In other words, the spring push 5 has an inner diameter of the optical fiber insertion through-hole 16 that allows the strand portion 8a of the optical fiber cord 8 to pass therethrough and has no room to pass the covering portion (cord portion) 8b. The lead length is defined, and the length of the wire portion 8a is less than a certain length, so that a sufficient surplus length cannot be secured. Therefore, when the wire portion 8a is covered with a spring as in the conventional case, this is used as an optical ferrule. 3 cannot be sufficiently separated from the rear end surface, and is present in a close position. As a result, when the optical ferrule 3 is terminated, the spring pushing through the wire portion 8a becomes an obstacle to the operation.
However, according to the optical connector 1 described above, since the spring push 5 is divided into two parts, as described above, after attaching the optical ferrule to the tip of the optical fiber and terminating it, the optical fiber (wire portion 8a) Can be put on. Accordingly, when the optical ferrule is terminated, the optical ferrule can be terminated easily without the spring being disturbed by the work. Similarly, the spring 4 is an obstacle to work, but since it can expand and contract and bend freely, it does not become a major obstacle such as pushing a spring.

次いで、光ファイバにコイルスプリング4の上からスプリング押し5を装着する。この場合、スプリング押し5が2つの半体15に分割されているので、2つの半体15を光ファイバ及びコイルスプリング4を囲むように合わせて互いに接合すると、スプリング押し5が光ファイバに装着されたことになる。その接合の際、一方の半体15の係合突起26が他方の半体15の係合穴27に嵌合して、両者の接合が堅固なものとなる。また、係合突起26と係合穴27とによる接合の作業は、極めて容易であり、作業性が良好である。
次いで、光フェルール3をコネクタハウジング2内の前方部に収容し、スプリング押し5の先端の係合爪18をコネクタハウジング2の係合穴2aに係合させるとともに基部20の両側の突出部20aをコネクタハウジング2の段差状拡径部2dに係合させると、スプリング押し5がコネクタハウジング2の後部に取り付けられる。次いで、ゴムブーツ9をスプリング押し5の後部のゴムブーツ取付部22に被せる。これにより光コネクタ1の組立が完了する。
Next, a spring push 5 is attached to the optical fiber from above the coil spring 4. In this case, since the spring push 5 is divided into two halves 15, when the two halves 15 are joined together so as to surround the optical fiber and the coil spring 4, the spring push 5 is attached to the optical fiber. That's right. At the time of the joining, the engaging projections 26 of one half 15 are fitted into the engaging holes 27 of the other half 15 so that the joining of both is solid. Further, the joining work by the engaging protrusion 26 and the engaging hole 27 is extremely easy and the workability is good.
Next, the optical ferrule 3 is accommodated in the front part in the connector housing 2, the engaging claws 18 at the tip of the spring push 5 are engaged with the engaging holes 2 a of the connector housing 2, and the protruding parts 20 a on both sides of the base part 20 are engaged. When engaged with the stepped enlarged diameter portion 2 d of the connector housing 2, the spring push 5 is attached to the rear portion of the connector housing 2. Next, the rubber boot 9 is put on the rubber boot mounting portion 22 at the rear of the spring push 5. Thereby, the assembly of the optical connector 1 is completed.

上記実施例では、スプリング押し5を構成する2つの半体15が互いに完全分離した分割片であるが、2つの半体をヒンジ結合した構造とすることも可能である。そのヒンジ構造として種々考えらえるが、柔軟な樹脂による薄肉ヒンジ部によることができる。薄肉ヒンジ部の樹脂は半体より柔軟な材質が適切であるが、同材質も考えられる。   In the above embodiment, the two halves 15 constituting the spring pusher 5 are divided pieces that are completely separated from each other. However, the two halves may be hinged. Various hinge structures can be considered, but a thin hinge portion made of a flexible resin can be used. The thin hinge resin is preferably made of a material that is more flexible than the half, but the same material is also conceivable.

また、上述した実施例の光コネクタ1は、多心光コネクタであるいわゆるMPOコネクタに適用したものであるが、必ずしもMPOコネクタに限定ず、他のタイプの多心光コネクタに適用することができる。   Moreover, although the optical connector 1 of the Example mentioned above is applied to what is called a MPO connector which is a multi-fiber optical connector, it is not necessarily limited to an MPO connector, and can be applied to other types of multi-fiber optical connectors. .

また、多心光コネクタに限らず、例えばJIS C 5973に規定されるSC形光コネクタ等の単心光コネクタに適用することも可能である。要するに、コネクタハウジング内に光フェルール及びこの光フェルールを前方に付勢するコイルスプリングを収容し、前記コネクタハウジングの後端側に取り付けた、光ファイバ挿通用貫通穴及びスプリング受け部を持つスプリング押しで、前記コイルスプリングの反力を受けるようにした構造の光コネクタであれば、これに適用することができる。   Further, the present invention is not limited to a multi-fiber optical connector, and can be applied to a single-fiber optical connector such as an SC type optical connector defined in JIS C 5973, for example. In short, an optical ferrule and a coil spring that urges the optical ferrule forward are accommodated in the connector housing, and are attached to the rear end side of the connector housing by a spring pusher having an optical fiber insertion through hole and a spring receiving portion. Any optical connector having a structure adapted to receive the reaction force of the coil spring can be applied.

本発明の一実施例の光コネクタの平面断面図である。It is a plane sectional view of the optical connector of one example of the present invention. 上記光コネクタにおけるスプリング押しの斜視図である。It is a perspective view of the spring push in the said optical connector. 図2のスプリング押しの分解図である。FIG. 3 is an exploded view of the spring push of FIG. 2. 上記スプリング押しにおける半体の側面図である。It is a side view of the half body in the said spring pushing. 図4の平面図である。FIG. 5 is a plan view of FIG. 4. 図4の底面図である。FIG. 5 is a bottom view of FIG. 4. 図4のA矢視図である。It is A arrow directional view of FIG. 図5のB−B断面図である。It is BB sectional drawing of FIG. 従来の光コネクタの、片側を断面で示した平面図である。It is the top view which showed the cross section of the one side of the conventional optical connector. 図9におけるスプリング押しの斜視図である。FIG. 10 is a perspective view of a spring push in FIG. 9. 従来の光コネクタの外観をアダプタとともに示す斜視図である。It is a perspective view which shows the external appearance of the conventional optical connector with an adapter.

符号の説明Explanation of symbols

1 光コネクタ
2 コネクタハウジング
2a 係合穴
2b 段差状拡径部
2c 係合凹所
3 光フェルール
4 コイルスプリング
5 スプリング押し
6 カップリング
7 カップリング用スプリング
8 光ファイバ(光ファイバコード)
8a 素線部(光ファイバコードの光ファイバ素線部分)
8b 被覆部(光ファイバコードの被覆部分(コード部))
9 ゴムブーツ
15 半体
16 光ファイバ挿通用貫通穴
17 スプリング受け部
18 係合爪
20 基部
20a 突出部
20b 中央部
20” 接合面
21 アーム部
22 ゴムブーツ取付部
23 ピンクランプ
24 ガイドピン
DESCRIPTION OF SYMBOLS 1 Optical connector 2 Connector housing 2a Engagement hole 2b Step-shaped enlarged diameter part 2c Engagement recess 3 Optical ferrule 4 Coil spring 5 Spring pushing 6 Coupling 7 Coupling spring 8 Optical fiber (optical fiber cord)
8a Wire part (Optical fiber part of optical fiber cord)
8b Covering part (covering part of optical fiber cord (cord part))
9 Rubber boot 15 Half body 16 Optical fiber insertion through hole 17 Spring receiving portion 18 Engaging claw 20 Base portion 20a Protruding portion 20b Center portion 20 "Joint surface 21 Arm portion 22 Rubber boot mounting portion 23 Pink lamp 24 Guide pin

Claims (2)

コネクタハウジング内に光フェルール及びこの光フェルールを前方に付勢するコイルスプリングを収容し、前記コネクタハウジングの後端側に取り付けた、光ファイバ挿通用貫通穴及びスプリング受け部を持つスプリング押しで、前記コイルスプリングの反力を受けるようにした光コネクタにおいて、
前記スプリング押しを、組み合わせた時に光ファイバ挿通用貫通穴及びスプリング受け部を形成する2つの半体で構成したことを特徴とする光コネクタ。
An optical ferrule and a coil spring that urges the optical ferrule forward are accommodated in the connector housing, and attached to the rear end side of the connector housing, with a spring pusher having an optical fiber insertion through hole and a spring receiving portion, In the optical connector designed to receive the reaction force of the coil spring,
An optical connector comprising two halves that, when combined, form a through hole for inserting an optical fiber and a spring receiving portion.
前記2つの半体のうちの一方の半体の接合面に係合突起、他方の半体の接合面に前記係合突起が嵌合する係合凹所を設けたことを特徴とする請求項1記載の光コネクタ。   An engagement recess is provided in the joining surface of one half of the two halves and the engaging recess is fitted in the joining surface of the other half. The optical connector according to 1.

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