JPS6240683B2 - - Google Patents
Info
- Publication number
- JPS6240683B2 JPS6240683B2 JP59128699A JP12869984A JPS6240683B2 JP S6240683 B2 JPS6240683 B2 JP S6240683B2 JP 59128699 A JP59128699 A JP 59128699A JP 12869984 A JP12869984 A JP 12869984A JP S6240683 B2 JPS6240683 B2 JP S6240683B2
- Authority
- JP
- Japan
- Prior art keywords
- resin
- optical fiber
- optical connector
- connector ferrule
- optical
- 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
Links
- 229920005989 resin Polymers 0.000 claims description 35
- 239000011347 resin Substances 0.000 claims description 35
- 239000013307 optical fiber Substances 0.000 claims description 27
- 230000003287 optical effect Effects 0.000 claims description 17
- 239000002184 metal Substances 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 9
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 238000000465 moulding Methods 0.000 description 14
- 239000003822 epoxy resin Substances 0.000 description 5
- 238000005498 polishing Methods 0.000 description 5
- 229920000647 polyepoxide Polymers 0.000 description 5
- 239000000919 ceramic Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000007872 degassing Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- -1 0.125 mmφ Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000006082 mold release agent Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/36—Mechanical coupling means
- G02B6/38—Mechanical coupling means having fibre to fibre mating means
- G02B6/3807—Dismountable connectors, i.e. comprising plugs
- G02B6/3833—Details of mounting fibres in ferrules; Assembly methods; Manufacture
- G02B6/3865—Details of mounting fibres in ferrules; Assembly methods; Manufacture fabricated by using moulding techniques
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mechanical Coupling Of Light Guides (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は光フアイバを位置決め固定し、相互の
結合を実現する光コネクタフエルールに関するも
のである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an optical connector ferrule for positioning and fixing optical fibers and realizing mutual coupling.
（従来技術と問題点）
従来の光コネクタフエルールには、第１図イに
示すような全体をエポキシ樹脂等の樹脂材料３で
構成した樹脂タイプと、第１図ロに示すような先
端にセラミツク等の高硬度部材５を設けその他を
金属材料４で構成した金属タイプがある。なお図
面において１は光フアイバ心線、２は光フアイバ
心線１の被覆層を除去して露出された光フアイバ
である。(Prior art and problems) Conventional optical connector ferrules include a resin type that is entirely made of a resin material 3 such as epoxy resin as shown in Figure 1A, and a resin type that is made of a resin material 3 such as epoxy resin at the tip as shown in Figure 1B. There is a metal type in which a high hardness member 5 such as ceramic is provided and the rest is made of a metal material 4. In the drawings, reference numeral 1 indicates a coated optical fiber, and reference numeral 2 indicates an optical fiber exposed by removing the coating layer of the coated optical fiber 1.
前述の樹脂タイプ（第１図イ）のものは成形容
易なために金型さえ製作すれば量産可能で経済性
に富んでいるが、フエルール先端の研磨におい
て、光フアイバ２の材質である石英ガラスに対し
て樹脂３の方が非常に軟いため、第２図に示すよ
うに光フアイバ２の先端が樹脂３より△Ｘ（約１
〜２μｍ）突き出す形で研磨が行われ、脱着回数
の多い光コネクタにおいてはこの突出した光フア
イバ２部分に割れが生じる等実用面での問題が生
じている。一方第１図ロに示すような先端にセラ
ミツク等の石英より硬度が高い高硬度部材５を一
体に設けた金属タイプでは、樹脂タイプのような
研磨による光フアイバ２の突出はなく実用上の問
題はないが、金属パイプ４の内面及び外面の精密
な加工が必要で、コスト面において樹脂タイプの
ものよりもはるかに高価になるという欠点があつ
た。 The resin type mentioned above (Fig. 1 A) is easy to mold and can be mass-produced as long as a mold is made, making it highly economical. However, since the resin 3 is much softer than the resin 3, the tip of the optical fiber 2 is more ΔX (approximately 1
In optical connectors in which polishing is performed in a protruding form (~2 μm) and the optical fibers are frequently connected and disconnected, practical problems such as cracks occurring in the protruding optical fiber 2 portion have arisen. On the other hand, in the case of a metal type, as shown in FIG. However, it requires precise processing of the inner and outer surfaces of the metal pipe 4, and has the disadvantage that it is much more expensive than the resin type.
（発明の開示）
本発明は上述の欠点を解消し、実用面において
も経済面においてもすぐれた光コネクタフエルー
ルを提供するもので、その特徴は、樹脂成形部の
外周の一部に金属パイプを具え、先端部は光フア
イバを位置決め固定した石英ガラスより硬度の高
い高硬度部材で形成されており、上記高硬度部材
の先端が金属パイプ及び樹脂成形部より前方に突
出していることにある。(Disclosure of the Invention) The present invention eliminates the above-mentioned drawbacks and provides an optical connector ferrule that is excellent both in practical and economic terms. The tip portion is made of a high-hardness member that is harder than the quartz glass used to position and fix the optical fiber, and the tip of the high-hardness member protrudes forward from the metal pipe and the resin molded portion.
第３図は本発明の光コネクタフエルールの具体
例の縦断面図である。フエルール本体はエポキシ
樹脂等の樹脂成形部３で構成されており、その先
端にはセラミツク等の石英ガラスより硬度の高い
高硬度部材５がその先端を樹脂成形部３より前方
に突出し、他端は樹脂成形の際、内部に埋込まれ
て一体に成形固定されている。なお高硬度部材５
と樹脂成形部３との接着性向上のため高硬度部材
５の外周の一部には凹部５ａが設けてある。 FIG. 3 is a longitudinal sectional view of a specific example of the optical connector ferrule of the present invention. The ferrule main body is composed of a resin molded part 3 made of epoxy resin or the like, and a high-hardness member 5 made of ceramic or the like which is harder than quartz glass protrudes forward from the resin molded part 3, and the other end is made of a resin molded part 3 made of epoxy resin. During resin molding, it is embedded inside and molded and fixed as one piece. In addition, high hardness member 5
A recess 5a is provided in a part of the outer periphery of the high hardness member 5 in order to improve the adhesion between the resin molded part 3 and the resin molded part 3.
又フエルール本体の樹脂成形部３の少くとも結
合部の外周には、一端を樹脂成形部３中に埋込ん
だ金属パイプ６が樹脂成形部３と一体に成形され
設けられている。なお、金属パイプには樹脂成形
部３との接着性向上のため凹部６ａを設けてあ
る。なお、光フアイバ心線１は樹脂成形部３中に
固定されており、光フアイバ２の先端部は高硬度
部材５中に位置決め固定されている。 Further, a metal pipe 6 with one end embedded in the resin molded part 3 is molded integrally with the resin molded part 3 and is provided on at least the outer periphery of the joint part of the resin molded part 3 of the ferrule main body. Note that a recess 6a is provided in the metal pipe to improve adhesion to the resin molded part 3. Note that the optical fiber core wire 1 is fixed in the resin molded part 3, and the tip end of the optical fiber 2 is positioned and fixed in the high hardness member 5.
第４図は第３図に示す外周に金属パイプを有す
る本発明の光コネクタフエルールの製造方法を示
す金型の縦断面図で、中金型１３に把持された金
型キヤビテイ１１の下方より高硬度部材５を挿入
し下金型１２を上昇させて固定する。又上方より
金属パイプ６と光フアイバ２及びこれに続く光フ
アイバ心線１を挿入し所定の位置に保持し、つい
で上金型１４をセツトし樹脂注入口１４よりエポ
キシ樹脂等の成形用樹脂３を注入し成形固化させ
る。この際光フアイバ２及び光フアイバ心線１の
外径よりもわずかに大きい外径を有する成形用ピ
ン１５（第５図）を光フアイバ２及び光フアイバ
心線１の代りに挿入して成形し、しかる後上記成
形用ピン１５を抜き去り、光フアイバ２及び光フ
アイバ心線１を挿入し、樹脂材料３との空隙に接
着剤を流入して固定するようにしてもよい。又成
形時のガス抜きのために第６図に示すように高硬
度部材５にはその軸方向に多数の微細孔１６を設
けることが好ましく、又樹脂材料との接着性向上
のため凹部５ａを設けるのがよい。 FIG. 4 is a vertical sectional view of a mold showing a method of manufacturing the optical connector ferrule of the present invention having a metal pipe on the outer periphery shown in FIG. The high hardness member 5 is inserted and the lower mold 12 is raised and fixed. Further, the metal pipe 6, the optical fiber 2, and the optical fiber core 1 following this are inserted from above and held in a predetermined position.Then, the upper mold 14 is set, and a molding resin 3 such as epoxy resin is injected from the resin injection port 14. Inject and mold and solidify. At this time, a molding pin 15 (FIG. 5) having an outer diameter slightly larger than the outer diameter of the optical fiber 2 and the optical fiber core 1 is inserted in place of the optical fiber 2 and the optical fiber core 1 and molded. After that, the molding pin 15 may be removed, the optical fiber 2 and the optical fiber core 1 may be inserted, and an adhesive may be flowed into the gap between the resin material 3 and the resin material 3 to be fixed. Further, it is preferable to provide a large number of fine holes 16 in the axial direction of the high-hardness member 5 as shown in FIG. 6 for degassing during molding, and to improve adhesion to the resin material, a recess 5a is provided. It is good to have one.
（実施例）
内径が２段に変化している電鋳で製造した金型
キヤビテイ１１を第５図に示すように中金型１３
に組込み、上記下孔に、30μｍφ程度の微細孔を
多数設けたフアイバ径より若干大きい穴径を有す
るセラミツク部材５を挿入し、下金型１２で固定
した。ししかる後上部から金属パイプ６及び光フ
アイバ外径が0.125mmφの光フアイバ心線１を挿
入し、第４図に示すように上金型１４とセツト
し、注入口１４ａから低圧成形可能なエポキシ樹
脂を注入して成形固化した。その後このフエルー
ルを金型から取り出し研磨した後光コネクタハウ
ジングを取り付けて各種特性を評価した。研磨後
の表面は第７図に示すように高硬度部材３に対し
て光フアイバが１〜２μｍ程度へこんでおり、キ
ズ及び多種反射の防止等に有効であり、第１図ロ
の金属タイプフエルールと同等の形状特性を有し
ていることを確認した。又成形時間は部品の挿入
から成形時間までを含めて約10分程度実現し、従
来の樹脂タイプフエルール並みの成形速度であつ
た。なお本実施例では１コ取りで示したが、多数
個取りにすれば、さらに著しく成形時間は低下す
る。さらに光コネクタの結合特性はｎ＝50で平均
0.52dBと実用上問題はなく、1000回の脱着テス
ト及び−30℃〜＋70℃のヒートサイクルテスト20
日間においても特性の変化はみられなかつた。(Example) As shown in FIG.
A ceramic member 5 having a hole diameter slightly larger than the fiber diameter and having a large number of fine holes of about 30 μm in diameter was inserted into the prepared hole and fixed with a lower mold 12. Afterwards, insert the metal pipe 6 and the optical fiber core wire 1 with an outer diameter of 0.125 mmφ from the upper part, set it in the upper mold 14 as shown in FIG. The resin was injected and molded and solidified. Thereafter, this ferrule was removed from the mold, a polished backlight connector housing was attached, and various characteristics were evaluated. As shown in Fig. 7, the surface after polishing has a recess of about 1 to 2 μm in the optical fiber relative to the high-hardness member 3, which is effective for preventing scratches and various reflections, and is similar to the metal type fiber shown in Fig. 1B. It was confirmed that it had the same shape characteristics as the rule. In addition, the molding time was approximately 10 minutes, including the time from inserting the parts to molding, which was comparable to the molding speed of conventional resin type ferrules. In this embodiment, one mold is used, but if a large number of molds are used, the molding time will be further significantly reduced. Furthermore, the coupling characteristics of optical connectors are averaged at n = 50.
There is no practical problem at 0.52dB, and it has been tested 1,000 times by attaching and detaching it and 20 heat cycle tests from -30℃ to +70℃.
No changes in characteristics were observed even during the day.
さらに、光フアイバの代りに第６図に示す成形
用ピンを用いても実施した。ピン先端の外径は光
フアイバの外径0.125mmφよりわずかに大きいも
のを使用し、あらかじめ離型剤をぬつておいた。
この方法で得られた光コネクタもｎ＝30で結合特
性は平均0.54dBで実用上問題がないことが確認
された。 Furthermore, a molding pin shown in FIG. 6 was used instead of the optical fiber. The outer diameter of the tip of the pin was slightly larger than the outer diameter of the optical fiber, 0.125 mmφ, and a mold release agent was removed beforehand.
The optical connector obtained by this method also had coupling characteristics of 0.54 dB on average when n=30, and it was confirmed that there was no problem in practical use.
（発明の効果）
本発明の光コネクタフエルールによれば、本体
は樹脂材料で、先端部はセラミツク等の高硬度部
材よりなり、樹脂により一体に成形されているた
め、研磨時に光フアイバの突出を防止できると共
に、製造面でも従来の樹脂タイプ並みの量産性が
実現でき経済性においてもすぐれている。(Effects of the Invention) According to the optical connector ferrule of the present invention, the main body is made of a resin material, and the tip part is made of a high-hardness member such as ceramic.Since the optical connector ferrule is integrally molded with resin, the optical fiber does not protrude during polishing. In addition to being able to prevent this, it also has excellent economic efficiency as it can be mass-produced on a par with conventional resin types.
又高硬度部材として軸方向に多数の微細孔を設
けたものを用いることにより、成形時のガス抜き
効果を有し、成形の歩留りを著しく向上させうる
利点をも有するものである。 Furthermore, by using a high-hardness member having a large number of fine holes in the axial direction, it has the advantage of having a degassing effect during molding and significantly improving the molding yield.
第１図は従来の光コネクタフエルールの縦断面
図で、イは樹脂タイプ、ロは金属タイプ、第２図
は樹脂タイプの研磨後の状態を示す拡大図であ
る。第３図は本発明に係る光コネクタフエルール
の具体例の縦断面図、第４図は本発明の光コネク
タフエルールの製造方法を示す金型の縦断面図、
第５図は製造に用いる成形用ピン、第６図は高硬
度部材の一実施例の拡大縦断面図、第７図は本発
明の光コネクタフエルールの研磨後の状態を示す
部分拡大図である。
１…光フアイバ心線、２…光フアイバ、３…樹
脂材料、５…高硬度部材、６…金属パイプ、１１
…金属キヤビテイ、１２，１３，１４…金型、１
５…成形用ピン、１６…微細孔。
FIG. 1 is a longitudinal sectional view of a conventional optical connector ferrule, A is a resin type, B is a metal type, and FIG. 2 is an enlarged view showing the state of the resin type after polishing. FIG. 3 is a vertical cross-sectional view of a specific example of the optical connector ferrule according to the present invention, and FIG. 4 is a vertical cross-sectional view of a mold showing the method for manufacturing the optical connector ferrule of the present invention.
FIG. 5 is a molding pin used for manufacturing, FIG. 6 is an enlarged vertical cross-sectional view of an example of a high-hardness member, and FIG. 7 is a partially enlarged view showing the state of the optical connector ferrule of the present invention after polishing. be. DESCRIPTION OF SYMBOLS 1... Optical fiber core wire, 2... Optical fiber, 3... Resin material, 5... High hardness member, 6... Metal pipe, 11
...Metal cavity, 12, 13, 14...Mold, 1
5... Molding pin, 16... Fine hole.
Claims (1)
光コネクタフエルールにおいて、樹脂成形部の外
周の一部に金属パイプを具え、先端部は光フアイ
バを位置決め固定した石英ガラスより硬度の高い
高硬度部材で形成されており、上記高硬度部材の
先端が金属パイプ及び樹脂成形部より前方に突出
していることを特徴とする光コネクタフエルー
ル。 ２ 高硬度部材が軸方向に貫通した多数の微細孔
を有することを特徴とする特許請求の範囲第１項
記載の光コネクタフエルール。[Claims] 1. In an optical connector ferrule for positioning and fixing optical fibers and realizing coupling, a part of the outer periphery of the resin molded part is provided with a metal pipe, and the tip part is harder than the quartz glass used to position and fix the optical fiber. An optical connector ferrule is made of a high-hardness material with a high hardness, and a tip of the high-hardness material projects forward from a metal pipe and a resin molded part. 2. The optical connector ferrule according to claim 1, wherein the high-hardness member has a large number of fine holes passing through it in the axial direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12869984A JPS617811A (en) | 1984-06-21 | 1984-06-21 | Optical connector ferrule and its manufacture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12869984A JPS617811A (en) | 1984-06-21 | 1984-06-21 | Optical connector ferrule and its manufacture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS617811A JPS617811A (en) | 1986-01-14 |
| JPS6240683B2 true JPS6240683B2 (en) | 1987-08-29 |
Family
ID=14991232
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12869984A Granted JPS617811A (en) | 1984-06-21 | 1984-06-21 | Optical connector ferrule and its manufacture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS617811A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0162513U (en) * | 1987-10-15 | 1989-04-21 | ||
| EP0644442B1 (en) * | 1993-04-02 | 2000-06-21 | The Furukawa Electric Co., Ltd. | Terminal of optical fiber, method of its manufacture, and structure for connecting the terminal and optical device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5497051A (en) * | 1978-01-18 | 1979-07-31 | Nippon Telegr & Teleph Corp <Ntt> | Production of optical fiber connector |
| JPS55166612A (en) * | 1979-06-14 | 1980-12-25 | Hitachi Chem Co Ltd | Production of optical fiber connector |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5638487Y2 (en) * | 1977-09-20 | 1981-09-08 |
-
1984
- 1984-06-21 JP JP12869984A patent/JPS617811A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5497051A (en) * | 1978-01-18 | 1979-07-31 | Nippon Telegr & Teleph Corp <Ntt> | Production of optical fiber connector |
| JPS55166612A (en) * | 1979-06-14 | 1980-12-25 | Hitachi Chem Co Ltd | Production of optical fiber connector |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS617811A (en) | 1986-01-14 |
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