JP2893231B2 - Ferrule for optical connector and manufacturing method thereof - Google Patents
Ferrule for optical connector and manufacturing method thereofInfo
- Publication number
- JP2893231B2 JP2893231B2 JP22060793A JP22060793A JP2893231B2 JP 2893231 B2 JP2893231 B2 JP 2893231B2 JP 22060793 A JP22060793 A JP 22060793A JP 22060793 A JP22060793 A JP 22060793A JP 2893231 B2 JP2893231 B2 JP 2893231B2
- Authority
- JP
- Japan
- Prior art keywords
- ferrule
- mold
- fiber hole
- optical connector
- window
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Mechanical Coupling Of Light Guides (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この発明は、光コネクタ用フェル
ールとその製造方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ferrule for an optical connector and a method for manufacturing the same.
【０００２】[0002]
【従来の技術】図４に、4心光ファイバテープ心線用の
フェルールの一例を示す。（ａ）は斜視図、（ｂ）は縦
断面図である。１０はフェルールの全体、１１はその本
体である。１２はファイバ穴で、ここには、光ファイバ
（ガラス部分）が入る。１４はガイド溝で、ここには、
素線部分が入る。１６は端末穴で、ここには、心線の被
覆部分が入る。１８は窓で、接着剤を注入するためのも
のであり、上記のガイド溝１４に向かう位置に設けられ
る。１９，１９はガイド穴である。2. Description of the Related Art FIG. 4 shows an example of a ferrule for a four-core optical fiber ribbon. (A) is a perspective view, (b) is a longitudinal sectional view. 10 is the whole ferrule, and 11 is the main body. Reference numeral 12 denotes a fiber hole, into which an optical fiber (glass portion) enters. 14 is a guide groove, in which
The wire part enters. Reference numeral 16 denotes a terminal hole, into which a covered portion of the core wire is inserted. Reference numeral 18 denotes a window for injecting an adhesive, which is provided at a position facing the guide groove 14. 19 and 19 are guide holes.
【０００３】フェルール１０は、プラスチックやセラミ
ックス（プラスチックバインダ）のトランスファ成形や
インジェクション成形により作られる。その成形に用い
る金形の一例を図５〜７に示す。図５は分解斜視図、図
６は上型を除いた状態の平面図、図７は縦断立面図であ
る。２０は金型の全体を示す（図５，図７）。これは、
下型２２と中型４０と上型５０とからなる。[0003] The ferrule 10 is made by transfer molding or injection molding of plastic or ceramics (plastic binder). An example of the mold used for the molding is shown in FIGS. 5 is an exploded perspective view, FIG. 6 is a plan view without the upper mold, and FIG. 7 is a vertical elevation view. Reference numeral 20 denotes the whole mold (FIGS. 5 and 7). this is,
It comprises a lower mold 22, a middle mold 40 and an upper mold 50.
【０００４】［下型２２について］２４はキャビティ
（図５では下半分だけ示されている）、２６は窓用駒
で、フェルール１０の窓１８を形成するためのもの。他
に、Ｕ溝２８、Ｖ溝３０、Ｖ溝３２を有する。[Lower mold 22] 24 is a cavity (only the lower half is shown in FIG. 5), and 26 is a window piece for forming the window 18 of the ferrule 10. In addition, a U groove 28, a V groove 30, and a V groove 32 are provided.
【０００５】［中型４０について］４２はガイド穴用ピ
ンで、フェルール１０のガイド穴１９を形成するための
もの。４４は端末形成具である。その本体４４０は四角
厚板状で、フェルール１０の端末穴１６を形成する。そ
の先端部４４２は、本体４４０の半分の厚さで、表面に
半丸溝が切ってある。この先端部４４２は、上記の窓用
駒２６とともにフェルール１０の窓１８を形成する。４
６はファイバ穴用ピンで、その先端部４６０は、フェル
ール１０のファイバ穴１２を形成する。またその基部４
６２は少し太くなっていて、下半分が端末形成具４４の
先端部４４２の丸溝に納まり、上半分がフェルール１０
のガイド溝１４を形成する。基部４６２の後部は、端末
形成具４４の本体４４０内にはまり込み保持されてい
る。[About the middle mold 40] 42 is a guide hole pin for forming the guide hole 19 of the ferrule 10. 44 is a terminal forming tool. The main body 440 has a square thick plate shape and forms the terminal hole 16 of the ferrule 10. The tip 442 is half the thickness of the main body 440 and has a semi-round groove on the surface. The tip portion 442 forms the window 18 of the ferrule 10 together with the window piece 26 described above. 4
Reference numeral 6 denotes a fiber hole pin whose tip 460 forms the fiber hole 12 of the ferrule 10. Also its base 4
62 is slightly thicker, the lower half fits into the round groove at the tip 442 of the terminal forming tool 44, and the upper half
Guide groove 14 is formed. The rear part of the base 462 is fitted and held in the main body 440 of the terminal forming tool 44.
【０００６】［上型５０、金型の組立及び成形につい
て］上型５０はスプルー５２を有する。端末形成具４４
の本体４４０を下型２２のＵ溝２８に納める（図６，図
７）。ファイバ穴用ピン４６の先端部４６０はＶ溝３２
に納まる。ガイド穴用ピン４２をＶ溝３０に納める。そ
して上型５０をかぶせる。そして、成形を行なう。成形
後、中型４０を抜き取ると、フェルール１０ができ上が
る。金型を精度よく製作しておけば、ファイバ穴用ピン
４６や端末形成具４４に変形の無い限り、成形品である
フェルールのファイバ穴１２の位置が狂うことはない。[Regarding Upper Die 50 and Die Assembly and Molding] The upper die 50 has a sprue 52. Terminal forming tool 44
Of the lower mold 22 in the U groove 28 (FIGS. 6 and 7). The distal end 460 of the fiber hole pin 46 is
Fit in. The guide hole pin 42 is placed in the V groove 30. Then, the upper mold 50 is covered. Then, molding is performed. After the molding, when the middle mold 40 is removed, the ferrule 10 is completed. If the mold is manufactured with high precision, the position of the fiber hole 12 of the molded ferrule will not be out of order unless the fiber hole pin 46 and the terminal forming tool 44 are deformed.
【０００７】[0007]
【発明が解決しようとする課題】従来の金型において
は、上記のように、ファイバ穴用ピン４６の基部４６２
の後部は端末形成具４４の本体４４０内にはまり込んで
保持されているが、基部４６２の前部は下半分が端末形
成具４４の先端部４４２の丸溝に納まった状態になって
いる（図７）。そのため、樹脂がキャビティ２４内に注
入成形され、離型する工程を繰り返すと、図８のよう
に、端末形成具４４の先端部４４２とファイバ穴用ピン
４６との隙間に成形材料６０が侵入してくる。そうなる
と、ファイバ穴用ピン４６が変形し、結果として、形成
されるフェルール１０のファイバ穴１２が傾斜する。そ
のようになると、フェルール接合面を研磨するにつれ
て、ファイバ穴１２がガイド穴１９に対して偏心するこ
とになり、性能上問題となる。In the conventional mold, as described above, the base 462 of the fiber hole pin 46 is used.
The rear part of the terminal forming tool 44 is held in the main body 440 of the terminal forming tool 44 while the front half of the base 462 is in a state in which the lower half is accommodated in the round groove of the tip 442 of the terminal forming tool 44 ( (FIG. 7). Therefore, when the resin is injected and molded into the cavity 24 and the process of releasing the mold is repeated, the molding material 60 enters the gap between the distal end portion 442 of the terminal forming tool 44 and the fiber hole pin 46 as shown in FIG. Come. Then, the fiber hole pin 46 is deformed, and as a result, the fiber hole 12 of the formed ferrule 10 is inclined. In such a case, as the ferrule joint surface is polished, the fiber hole 12 becomes eccentric with respect to the guide hole 19, which causes a problem in performance.
【０００８】[0008]
【課題を解決するための手段】図１（ｂ）に例示するよ
うに、ファイバ孔用ピン４６の基部４６２と窓用駒２６
との間に、成形材料の流れ込む隙間６２を設ける。As shown in FIG. 1B, a base 462 of a fiber hole pin 46 and a window piece 26 are provided.
And a gap 62 into which the molding material flows.
【０００９】この隙間６２は、積極的に成形材料が充填
される寸法にする。図１（ｂ）の場合は、従来の端末形
成具４４の先端部４４２を薄くして、ファイバ穴用ピン
４６との間に隙間６２を作るようにしている。あるい
は、図２のように、端末形成具４４の先端部４４２を全
部無くして、ファイバ穴用ピン４６と窓用駒２６との間
に隙間６２を作るようにしてもよい。[0009] The gap 62 is dimensioned to be positively filled with the molding material. In the case of FIG. 1B, the distal end portion 442 of the conventional terminal forming tool 44 is thinned so that a gap 62 is formed between the terminal forming tool 44 and the fiber hole pin 46. Alternatively, as shown in FIG. 2, the gap 62 may be formed between the fiber hole pin 46 and the window piece 26 by omitting all the distal end portions 442 of the terminal forming tool 44.
【００１０】上記の隙間６２を有する金型２０により成
形すると、図１（ｃ）のように、窓１８内の、ガイド溝
１４の底から離れた位置に、薄板状の張出し部分１５が
できた状態になる。When molded by the mold 20 having the above-mentioned gap 62, as shown in FIG. 1 (c), a thin plate-shaped overhang portion 15 is formed in the window 18 at a position away from the bottom of the guide groove 14. State.
【００１１】この張出し部分１５は、フェルールを使用
する際、接着剤注入の邪魔になるので使用する前に、図
３のように、工具６４の先端で本体１１から断ち切るよ
うにする。When the ferrule is used, it interferes with the injection of the adhesive when the ferrule is used. Therefore, as shown in FIG. 3, the protruding portion 15 is cut off from the main body 11 by the tip of the tool 64 as shown in FIG.
【００１２】[0012]
【発明の作用効果】成形時、金型２０内に注入されてい
る成形材料は粘度が低い。成形材料が隙間６２に回り込
み、キャビティ２４の内圧が一定になっていれば、ファ
イバ穴用ピン４６の変形は起きない。したがって、フェ
ルール１０のファイバ穴１２が傾斜することはなく、コ
ネクタの性能が向上し、製造歩留まりも高くなる。The molding material injected into the mold 20 at the time of molding has a low viscosity. If the molding material goes around the gap 62 and the internal pressure of the cavity 24 is constant, the fiber hole pin 46 does not deform. Therefore, the fiber hole 12 of the ferrule 10 is not inclined, so that the performance of the connector is improved and the production yield is increased.
【図１】本発明の実施例に係り、（ａ）は上型を除いた
状態の金型の平面図、（ｂ）は金型の縦断面図、（ｃ）
は上記の金型により製造したフェルールの縦断面図。FIG. 1A is a plan view of a mold without an upper mold, FIG. 1B is a longitudinal sectional view of the mold, and FIG.
3 is a longitudinal sectional view of a ferrule manufactured by using the above-described mold.
【図２】本発明の金型の別例の説明図。FIG. 2 is an explanatory view of another example of the mold of the present invention.
【図３】本発明のフェルールから張出し部分１５を除く
方法の説明図。FIG. 3 is an explanatory view of a method for removing the overhang portion 15 from the ferrule of the present invention.
【図４】従来のフェルールの説明図。FIG. 4 is an explanatory view of a conventional ferrule.
【図５】従来の金型の分解斜視図。FIG. 5 is an exploded perspective view of a conventional mold.
【図６】従来の金型の上型を除いた状態の平面図。FIG. 6 is a plan view of a conventional mold excluding an upper mold.
【図７】従来の金型の縦断立面図。FIG. 7 is a vertical sectional view of a conventional mold.
【図８】従来技術の問題点の説明図。FIG. 8 is an explanatory diagram of a problem of the conventional technique.
１０ フェルール １１ 本体 １２ ファイバ穴 １４ ガイド溝 １５ 張出し部分 １６ 端末穴 １８ 窓 １９ ガイド穴 ２０ 金型 ２２ 下型 ２４ キャビティ ２６ 窓用駒 ２８ Ｕ溝 ３０，３２ Ｖ溝 ４０ 中型 ４２ ガイド穴用ピン ４４ 端末形成具 ４４０ 本体 ４４２ 先端部 ４６ ファイバ穴用ピン ４６０ 先端部 ４６２ 基部 ５０ 上型 ５２ スプルー ６０ 成形材料 ６２ 隙間 ６４ 工具 DESCRIPTION OF SYMBOLS 10 Ferrule 11 Main body 12 Fiber hole 14 Guide groove 15 Projection part 16 Terminal hole 18 Window 19 Guide hole 20 Die 22 Lower mold 24 Cavity 26 Window piece 28 U groove 30, 32 V groove 40 Medium size 42 Guide hole pin 44 Terminal Forming tool 440 Body 442 Tip 46 Fiber hole pin 460 Tip 462 Base 50 Upper die 52 Sprue 60 Molding material 62 Gap 64 Tool
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平３−179406（ＪＰ，Ａ) 特開 平６−59157（ＪＰ，Ａ) (58)調査した分野(Int.Cl.6，ＤＢ名) G02B 6/36 - 6/40 ────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-3-179406 (JP, A) JP-A-6-59157 (JP, A) (58) Fields investigated (Int. Cl. 6 , DB name) G02B 6/36-6/40
Claims (2)
し、かつ前記ガイド溝に向かって開いている窓を有する
フェルールにおいて、前記窓内の前記ガイド溝の底から
離れた位置に、薄板状の張出し部分が設けられている、
光コネクタ用フェルール。1. A ferrule having a fiber hole, a guide groove following the fiber hole, and a window opened toward the guide groove, wherein a thin plate-shaped member is provided in the window at a position away from the bottom of the guide groove. An overhang portion is provided,
Ferrule for optical connector.
るファイバ孔用ピンと、窓用駒とをキャビティ内に突出
させている金型を用いて、光コネクタ用フェルールを成
形するに際して、前記ファイバ孔用ピンの基部と前記窓
用駒との間に、成形材料の流れ込む隙間の設けてある金
型を用いて成形する、光コネクタ用フェルールの製造方
法。2. A method of molding a ferrule for an optical connector using a mold having a terminal forming tool, a pin for a fiber hole held at the tip thereof, and a window piece protruding into a cavity. A method for manufacturing a ferrule for an optical connector, wherein the molding is performed using a mold provided with a gap into which a molding material flows between a base of a pin and a window piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22060793A JP2893231B2 (en) | 1993-08-12 | 1993-08-12 | Ferrule for optical connector and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22060793A JP2893231B2 (en) | 1993-08-12 | 1993-08-12 | Ferrule for optical connector and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0756054A JPH0756054A (en) | 1995-03-03 |
| JP2893231B2 true JP2893231B2 (en) | 1999-05-17 |
Family
ID=16753625
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22060793A Expired - Lifetime JP2893231B2 (en) | 1993-08-12 | 1993-08-12 | Ferrule for optical connector and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2893231B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4361193B2 (en) * | 1999-04-23 | 2009-11-11 | 株式会社フジクラ | Optical ferrule and optical connector using this optical ferrule |
| KR100403668B1 (en) * | 2001-08-06 | 2003-10-30 | 한국전자통신연구원 | Mold for molding an optical fiber connecting device and a method for fabricating the device using the same |
| CN113330343B (en) | 2019-02-04 | 2022-10-21 | 住友电气工业株式会社 | Ferrule and optical connector |
-
1993
- 1993-08-12 JP JP22060793A patent/JP2893231B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0756054A (en) | 1995-03-03 |
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