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JP4540583B2 - Fixed structure of optical fiber cable and ferrule - Google Patents

Fixed structure of optical fiber cable and ferrule Download PDF

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Publication number
JP4540583B2
JP4540583B2 JP2005301186A JP2005301186A JP4540583B2 JP 4540583 B2 JP4540583 B2 JP 4540583B2 JP 2005301186 A JP2005301186 A JP 2005301186A JP 2005301186 A JP2005301186 A JP 2005301186A JP 4540583 B2 JP4540583 B2 JP 4540583B2
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ferrule
diameter
optical fiber
fiber cable
welded portion
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JP2007108551A (en
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雅仁 尾▲崎▼
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Yazaki Corp
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Yazaki Corp
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Description

本発明は、レーザ溶着によって光ファイバケーブルの端末に固定されるフェルールと光ファイバケーブルとの固定構造に関する。 The present invention relates to a fixing structure between the ferrule and the optical fiber cable is fixed to the terminal of the optical fiber cable by laser welding.

フェルールをレーザ溶着によって光ファイバケーブルの端末に固定することについては、下記特許文献1に開示されている。   The fixation of the ferrule to the end of the optical fiber cable by laser welding is disclosed in Patent Document 1 below.

図3において、合成樹脂製の従来のフェルール1は、レーザ溶着によって光ファイバケーブル(POF)2の端末に固定されるように形成されている。また、フェルール1は、上記端末に固定された状態で図示しないフェルールハウジング(又は光コネクタハウジング)のフェルール収容部(図示省略)に収容されるように形成されている。さらに、フェルール1は、接続相手との光学的な接続が行われるように形成されている。   In FIG. 3, a conventional ferrule 1 made of synthetic resin is formed so as to be fixed to a terminal of an optical fiber cable (POF) 2 by laser welding. Further, the ferrule 1 is formed so as to be housed in a ferrule housing portion (not shown) of a ferrule housing (or optical connector housing) (not shown) in a state of being fixed to the terminal. Further, the ferrule 1 is formed so as to be optically connected to a connection partner.

上記フェルール1について具体的に説明すると、この内部には、光ファイバケーブル2の端末を差し込むことができるようなケーブル収容部(図示省略)が形成されている。フェルール1の外部には、溶着部3と、環状大径部4と、ストッパ5と、付勢部材取付部6とがこの順で連続するように形成されている。フェルール1は、略筒状の部材であって、この先端には、接続相手に対する接続用筒部7が一体に形成されている(尚、接続用筒部7がないフェルールも存在する。接続用筒部7がないフェルールについての図及び説明は省略する)。   The ferrule 1 will be specifically described. A cable housing portion (not shown) in which a terminal of the optical fiber cable 2 can be inserted is formed in the ferrule 1. On the outside of the ferrule 1, a welded portion 3, an annular large diameter portion 4, a stopper 5, and an urging member attaching portion 6 are formed so as to be continuous in this order. The ferrule 1 is a substantially cylindrical member, and a connecting cylinder portion 7 for a connection partner is integrally formed at the tip (a ferrule without the connecting cylinder portion 7 also exists). (The illustration and description of the ferrule without the cylindrical portion 7 are omitted).

溶着部3は、レーザ溶着が行われる部分として形成されている。この溶着部3は、レーザの出力が均一になるように肉厚が一定に形成されている。環状大径部4は、溶着部3よりも大径であって、フェルールハウジング(図示省略)のフェルール収容部(図示省略)の径に応じた大きさに形成されている。ストッパ5は、フェルール1をフェルール収容部(図示省略)に収容する際の前進を規制するために形成されている。ストッパ5は、フランジ状に形成されている。また、ストッパ5は、環状大径部4よりも大径に形成されている。   The welding part 3 is formed as a part where laser welding is performed. The welded portion 3 is formed with a constant thickness so that the laser output is uniform. The annular large-diameter portion 4 is larger in diameter than the welded portion 3 and has a size corresponding to the diameter of the ferrule housing portion (not shown) of the ferrule housing (not shown). The stopper 5 is formed to restrict the forward movement when the ferrule 1 is accommodated in a ferrule accommodating portion (not shown). The stopper 5 is formed in a flange shape. The stopper 5 is formed to have a larger diameter than the annular large diameter portion 4.

付勢部材取付部6は、フェルール1をフェルール収容部(図示省略)に向けて押し付けするための例えばバネ部材の取り付け部分として形成されている(尚、付勢部材取付部6がないフェルールも存在する。付勢部材取付部6がないフェルールについての図及び説明は省略する)。
特開2004−144921号公報
The biasing member mounting portion 6 is formed as, for example, a spring member mounting portion for pressing the ferrule 1 toward the ferrule housing portion (not shown) (there is also a ferrule without the biasing member mounting portion 6). (The illustration and description of the ferrule without the biasing member mounting portion 6 are omitted).
JP 2004-144921 A

ところで、上記従来技術にあっては、環状大径部4の径がフェルール収容部(図示省略)の径に合わせて設定されることから、一定であり構造上縮径することができない部分となっている。従って、溶着部3とは別に環状大径部4の位置でレーザ溶着を行い光ファイバケーブル2との固着力を高めるようにしたい場合には、次のような問題点が生じてしまうことになる。   By the way, in the said prior art, since the diameter of the cyclic | annular large diameter part 4 is set according to the diameter of a ferrule accommodating part (illustration omitted), it becomes a part which is constant and cannot be reduced in diameter structurally. ing. Therefore, when it is desired to increase the fixing force with the optical fiber cable 2 by performing laser welding at the position of the annular large-diameter portion 4 separately from the welded portion 3, the following problems occur. .

すなわち、環状大径部4は、溶着部3と比べて厚肉となる部分であって、溶着部3のレーザ溶着に係る設定条件ではレーザ出力が最適とならないことから、十分な固着力を確保することができないという問題点が生じてしまうことになる。   That is, the annular large-diameter portion 4 is a portion that is thicker than the welded portion 3, and the laser output is not optimal under the setting conditions related to laser welding of the welded portion 3, so that sufficient fixing force is secured. The problem of being unable to do so will arise.

本発明は、上述した事情に鑑みてなされたもので、光ファイバケーブルとフェルールとの固着力を高めることが可能な、光ファイバケーブルとフェルールの固定構造を提供することを課題とする。 The present invention has been made in view of the above circumstances, capable of enhancing the fixing strength between the optical fiber cable and the ferrule, and to provide a fixing structure of an optical fiber cable and the ferrule.

上記課題を解決するためになされた請求項1記載の本発明の光ファイバケーブルとフェルールの固定構造は、光ファイバケーブルの端末に設けられてフェルールハウジングのフェルール収容部に収容されるフェルールであって、前記フェルール収容部の径に応じて形成される環状大径部、及び該環状大径部よりも小径で前記光ファイバケーブルとのレーザ溶着が行われる溶着部を有する合成樹脂製のフェルールにおいて,
前記環状大径部の外周面に環状の溝となる第二溶着部を、前記溶着部の径と同じ径に形成し、フェルールを光ファイバケーブルの端末に取り付けてレーザ溶着を、前記溶接部と、前記第二溶着部の二箇所施すことを特徴としている。
このような特徴を有する本発明によれば、溶着部とは別に環状大径部の位置でもレーザ溶着が行えるようになり、第二溶着部は環状の溝を用いれば環状大径部の径を縮径せずに、或いは、溶着条件を変えずに十分な固着力を得ることができ、フェルールの溶着部及び第二溶着部を溶着部位として光ファイバケーブルとフェルールとの固定がなされるようになる。
The fixing structure of the optical fiber cable and the ferrule according to the first aspect of the present invention, which has been made to solve the above-mentioned problems, is a ferrule provided at the end of the optical fiber cable and accommodated in a ferrule housing portion of the ferrule housing. In the synthetic resin ferrule having an annular large-diameter portion formed according to the diameter of the ferrule housing portion, and a welding portion that is smaller in diameter than the annular large-diameter portion and is laser-welded with the optical fiber cable,
A second welded portion that is an annular groove is formed on the outer peripheral surface of the annular large-diameter portion to have the same diameter as the diameter of the welded portion, and the laser welding is performed by attaching the ferrule to the end of an optical fiber cable. And two places of the second welded portion .
According to the present invention having such a feature, Ri as Na perform laser welding in separate annular large-diameter portion located from a bonded portion, the second weld portion is diameter of the annular large-diameter portion by using the annular groove It is possible to obtain a sufficient fixing force without reducing the diameter of the wire or without changing the welding conditions, so that the optical fiber cable and the ferrule can be fixed using the welded portion and the second welded portion of the ferrule as the welded portion. become.

上記課題を解決するためになされた請求項記載の本発明の光ファイバケーブルとフェルールの固定構造は、光ファイバケーブルの端末に設けられてフェルールハウジングのフェルール収容部に収容されるフェルールであって、前記フェルール収容部の径に応じて形成される環状大径部、及び該環状大径部よりも小径で前記光ファイバケーブルとのレーザ溶着が行われる溶着部を有する合成樹脂製のフェルールにおいて,
前記環状大径部の外周面に環状の溝となる第二溶着部を、前記溶着部の径と同じ径に形成するとともに、前記第二溶着部に、該第二溶着部の底面と前記外周面との間の段差となる環状の幅・肉厚調整部を形成し、該フェルールを光ファイバケーブルの端末に取り付けてレーザ溶着を、前記溶接部と、前記第二溶着部の二箇所施すことを特徴としている。
このような特徴を有する本発明によれば、溶着部とは別に環状大径部の位置でもレーザ溶着が行えるようになり、第二溶着部は環状の溝を用いれば環状大径部の径を縮径せずに、或いは、溶着条件を変えずに十分な固着力を得ることができ、第二溶着部の幅及び肉厚が最適に調整することができ、フェルールの溶着部及び第二溶着部を溶着部位として光ファイバケーブルとフェルールとの固定がなされるようになる。
The fixing structure of the optical fiber cable and the ferrule of the present invention according to claim 2 made to solve the above problem is a ferrule provided at a ferrule housing portion of a ferrule housing provided at a terminal of the optical fiber cable. In the synthetic resin ferrule having an annular large-diameter portion formed according to the diameter of the ferrule housing portion, and a welding portion that is smaller in diameter than the annular large-diameter portion and is laser-welded with the optical fiber cable,
A second welded portion that forms an annular groove on the outer peripheral surface of the annular large-diameter portion is formed to have the same diameter as the diameter of the welded portion, and the bottom surface of the second welded portion and the outer periphery are formed on the second welded portion. Forming an annular width / thickness adjusting portion that forms a step between the surface and attaching the ferrule to the end of the optical fiber cable, and performing laser welding at two locations, the welded portion and the second welded portion. It is characterized by.
According to the present invention having such a feature, laser welding can be performed at the position of the annular large-diameter portion separately from the welded portion, and if the second welded portion uses an annular groove, the diameter of the annular large-diameter portion can be increased. A sufficient fixing force can be obtained without reducing the diameter or without changing the welding conditions, the width and thickness of the second welded part can be adjusted optimally, and the welded part of the ferrule and the second welded part can be adjusted. The optical fiber cable and the ferrule are fixed by using the part as a welding part.

請求項1に記載された本発明によれば、光ファイバケーブルとの固着力を従来よりも高めることができるという効果を奏する。また、請求項2に記載された本発明によれば、第二溶着部の溶着に関して自由度を持たせることができるという効果を奏する。 According to the first aspect of the present invention, there is an effect that the fixing force with the optical fiber cable can be increased as compared with the conventional one. Further, according to the present invention described in claim 2, there is an effect that a degree of freedom can be given with respect to the welding of the second welding portion.

以下、図面を参照しながら説明する。図1は本発明の一実施の形態を示すフェルールの側面図である。尚、従来例と同一の部分には同一の符号を付して詳細な説明を省略する。   Hereinafter, description will be given with reference to the drawings. FIG. 1 is a side view of a ferrule showing an embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the part same as a prior art example, and detailed description is abbreviate | omitted.

図1において、本発明のフェルール11は、従来例に対し、環状大径部4に第二溶着部12を有する点が特徴となっている。本発明の特徴となる第二溶着部12は、環状大径部4の一部の径方向の厚みを薄くして形成されている。第二溶着部12は、環状の溝となるように外周面13に形成されている。第二溶着部12の底面14は、この径が溶着部3の径に略一致するように形成されている。環状大径部4は、第二溶着部12の存在により、恰もフェルール11の軸方向に分割されたような形状に形成されている。   In FIG. 1, the ferrule 11 of the present invention is characterized by having a second welded portion 12 in the annular large diameter portion 4 with respect to the conventional example. The second welded portion 12, which is a feature of the present invention, is formed by reducing the radial thickness of a part of the annular large diameter portion 4. The 2nd welding part 12 is formed in the outer peripheral surface 13 so that it may become a cyclic | annular groove | channel. The bottom surface 14 of the second welded portion 12 is formed so that the diameter thereof substantially matches the diameter of the welded portion 3. The annular large diameter portion 4 is formed in a shape that is also divided in the axial direction of the ferrule 11 due to the presence of the second welded portion 12.

上記構造において、フェルール11内部のケーブル収容部(図示省略)に光ファイバケーブル2の端末を差し込み、この後にフェルール11の溶着部3の部分でレーザ溶着を行うと、フェルール11が光ファイバケーブル2の端末に固定される。また、溶着条件を変えずに第二溶着部12の部分でもレーザ溶着を行うと、フェルール11が光ファイバケーブル2の端末に固定される。フェルール11は、二箇所のレーザ溶着によって光ファイバケーブル2の端末に固定される。フェルール11は、従来よりも強固に固定される。   In the above structure, when the end of the optical fiber cable 2 is inserted into a cable housing portion (not shown) inside the ferrule 11 and then laser welding is performed at the welded portion 3 of the ferrule 11, the ferrule 11 is attached to the optical fiber cable 2. Fixed to the terminal. Further, when laser welding is performed on the second welded portion 12 without changing the welding conditions, the ferrule 11 is fixed to the end of the optical fiber cable 2. The ferrule 11 is fixed to the end of the optical fiber cable 2 by laser welding at two locations. The ferrule 11 is fixed more firmly than before.

以上、図1を参照しながら説明してきたように、溶着部3とは別に環状大径部4の位置でレーザ溶着を行い光ファイバケーブル2との固着力を高めるようにしたい場合には、本発明の特徴となる第二溶着部12が有用な部分となることが分かる。   As described above with reference to FIG. 1, when it is desired to perform laser welding at the position of the annular large-diameter portion 4 separately from the welding portion 3 and increase the fixing force with the optical fiber cable 2, It turns out that the 2nd welding part 12 used as the characteristic of invention becomes a useful part.

次に、変形例を説明する。図2は変形例となるフェルール11の側面図である。   Next, a modified example will be described. FIG. 2 is a side view of a ferrule 11 as a modification.

図2において、第二溶着部12には、幅・肉厚調整部15が形成されている。幅・肉厚調整部14は、第二溶着部12の底面14と環状大径部4の外周面13との間に環状の段差16ができるように形成されている。   In FIG. 2, a width / thickness adjusting portion 15 is formed in the second welded portion 12. The width / thickness adjusting portion 14 is formed such that an annular step 16 is formed between the bottom surface 14 of the second welded portion 12 and the outer peripheral surface 13 of the annular large diameter portion 4.

幅・肉厚調整部15は、第二溶着部12の幅及び肉厚を最適に調整する部分であって、レーザ溶着の出力や部位を自由に変更することができるようになっている。言い換えれば、第二溶着部12の溶着に関して自由度を持たせることができるようになっている。   The width / thickness adjusting unit 15 is a part that optimally adjusts the width and thickness of the second welded part 12, and can freely change the output and part of laser welding. In other words, it is possible to provide a degree of freedom with respect to the welding of the second welded portion 12.

その他、本発明は本発明の主旨を変えない範囲で種々変更実施可能なことは勿論である。   In addition, it goes without saying that the present invention can be variously modified without departing from the spirit of the present invention.

本発明の一実施の形態を示すフェルールの側面図である。It is a side view of the ferrule which shows one embodiment of this invention. 図1の変形例となるフェルールの側面図である。It is a side view of the ferrule used as the modification of FIG. 従来例のフェルールの側面図である。It is a side view of the ferrule of a prior art example.

符号の説明Explanation of symbols

2 光ファイバケーブル
3 溶着部
4 環状大径部
11 フェルール
12 第二溶着部
13 外周面
14 底面
15 幅・肉厚調整部
16 段差
2 optical fiber cable 3 welded portion 4 annular large diameter portion 11 ferrule 12 second welded portion 13 outer peripheral surface 14 bottom surface 15 width / thickness adjusting portion 16 step

Claims (2)

光ファイバケーブルの端末に設けられてフェルールハウジングのフェルール収容部に収容されるフェルールであって、前記フェルール収容部の径に応じて形成される環状大径部、及び該環状大径部よりも小径で前記光ファイバケーブルとのレーザ溶着が行われる溶着部を有する合成樹脂製のフェルールにおいて,
前記環状大径部の外周面に環状の溝となる第二溶着部を、前記溶着部の径と同じ径に形成し、フェルールを光ファイバケーブルの端末に取り付けてレーザ溶着を、前記溶接部と、前記第二溶着部の二箇所施す
ことを特徴とする光ファイバケーブルとフェルールの固定構造
A ferrule provided at the end of an optical fiber cable and housed in a ferrule housing portion of a ferrule housing, wherein the annular large diameter portion is formed according to the diameter of the ferrule housing portion, and the diameter is smaller than the annular large diameter portion In a synthetic resin ferrule having a welded portion where laser welding with the optical fiber cable is performed,
A second welded portion that is an annular groove is formed on the outer peripheral surface of the annular large-diameter portion to have the same diameter as the diameter of the welded portion, and the laser welding is performed by attaching the ferrule to the end of an optical fiber cable. And a fixing structure of the optical fiber cable and the ferrule , wherein the second welded portion is applied at two locations .
光ファイバケーブルの端末に設けられてフェルールハウジングのフェルール収容部に収容されるフェルールであって、前記フェルール収容部の径に応じて形成される環状大径部、及び該環状大径部よりも小径で前記光ファイバケーブルとのレーザ溶着が行われる溶着部を有する合成樹脂製のフェルールにおいて,
前記環状大径部の外周面に環状の溝となる第二溶着部を、前記溶着部の径と同じ径に形成するとともに、前記第二溶着部に、該第二溶着部の底面と前記外周面との間の段差となる環状の幅・肉厚調整部を形成し、該フェルールを光ファイバケーブルの端末に取り付けてレーザ溶着を、前記溶接部と、前記第二溶着部の二箇所施す
ことを特徴とする光ファイバケーブルとフェルールの固定構造
A ferrule provided at the end of an optical fiber cable and housed in a ferrule housing portion of a ferrule housing, wherein the annular large diameter portion is formed according to the diameter of the ferrule housing portion, and the diameter is smaller than the annular large diameter portion In a synthetic resin ferrule having a welded portion where laser welding with the optical fiber cable is performed,
A second welded portion that forms an annular groove on the outer peripheral surface of the annular large-diameter portion is formed to have the same diameter as the diameter of the welded portion, and the bottom surface of the second welded portion and the outer periphery are formed on the second welded portion. Forming an annular width / thickness adjusting portion that forms a step between the surface and attaching the ferrule to the end of the optical fiber cable, and performing laser welding at two locations, the welded portion and the second welded portion. Fixed structure of optical fiber cable and ferrule characterized by
JP2005301186A 2005-10-17 2005-10-17 Fixed structure of optical fiber cable and ferrule Expired - Fee Related JP4540583B2 (en)

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JP2004333569A (en) * 2003-04-30 2004-11-25 Sanwa Denki Kogyo Co Ltd Optical fiber-incorporated plastic ferrule, metallic mold therefor and method of manufacturing the ferrule

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