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JP2001027720A - Dustproof cap - Google Patents

Dustproof cap

Info

Publication number
JP2001027720A
JP2001027720A JP11199544A JP19954499A JP2001027720A JP 2001027720 A JP2001027720 A JP 2001027720A JP 11199544 A JP11199544 A JP 11199544A JP 19954499 A JP19954499 A JP 19954499A JP 2001027720 A JP2001027720 A JP 2001027720A
Authority
JP
Japan
Prior art keywords
ferrule
cap
housing
gap
dustproof cap
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
JP11199544A
Other languages
Japanese (ja)
Other versions
JP4060992B2 (en
Inventor
Kosuke Hioki
康祐 日置
Hiroshi Nakagome
弘 中込
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.)
NTT Electronics Corp
Sanwa Denki Kogyo Co Ltd
Original Assignee
NTT Electronics Corp
Sanwa Denki Kogyo Co 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 NTT Electronics Corp, Sanwa Denki Kogyo Co Ltd filed Critical NTT Electronics Corp
Priority to JP19954499A priority Critical patent/JP4060992B2/en
Publication of JP2001027720A publication Critical patent/JP2001027720A/en
Application granted granted Critical
Publication of JP4060992B2 publication Critical patent/JP4060992B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

PROBLEM TO BE SOLVED: To obtain adaptability for plugs having different diameter or the like and to reduce cost in the dustproof cap for the ferrule of an optical connector plug. SOLUTION: In this dustproof cap 1, the inside diameter (j) is larger than the outside diameter (k) of a ferrule 7, the outside diameter coincides with respective different large and small inside diameters (h) of a housing 6, and moreover plural different large and small fitting parts 3, 4, respective outer shapes of which have a circular locus, are successively provided stepwise from the tip end to the base plate 2 side to be formed, and plural number of caps 1 are integrally juxtaposed and formed.

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】本発明は、光コネクタ用プラ
グのフェルールに対する空気中の塵、埃等の付着防止キ
ャップに関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cap for preventing dust in the air from adhering to a ferrule of an optical connector plug.

【0002】[0002]

【従来の技術】従来、光コネクタ用プラグに嵌合するプ
ラスチック製の防塵キャップは公知である。この防塵キ
ャップは図8に示したように、基板aから嵌合用円筒部
bを一体に突出して形成され、ハウジングcとフェルー
ルdとの間に形成される隙間eに、当該キャップの円筒
部bとフェルールdとの間にフェルールd保護のための
隙間5が形成されるように嵌合する構成である。
2. Description of the Related Art Conventionally, plastic dust caps to be fitted to optical connector plugs are known. As shown in FIG. 8, this dustproof cap is formed by integrally projecting a fitting cylindrical portion b from a substrate a, and a cylindrical portion b of the cap is provided in a gap e formed between a housing c and a ferrule d. The ferrule d is fitted so that a gap 5 for protecting the ferrule d is formed between the ferrule d.

【0003】[0003]

【発明が解決しようとする課題】しかしながら、上記し
た従来の防塵キャップは、嵌合用円筒部bの外径が一定
であるので、プラグの種類によって、ハウジングcとフ
ェルールdとの間の隙間g(ハウジングの口径)が大、
小異なるもの全て対して使用することができない。よっ
て、上記した隙間gの大きさに合致する複数種のキャッ
プを個別に形成し、準備する必要がある。
However, in the above-mentioned conventional dustproof cap, since the outer diameter of the fitting cylindrical portion b is constant, the gap g (between the housing c and the ferrule d depends on the type of plug. Large housing diameter)
It cannot be used for all small differences. Therefore, it is necessary to separately form and prepare a plurality of types of caps that match the size of the gap g.

【0004】さらに、上記従来キャップは単体に形成さ
れているので、多数のプラグを整理して保管することが
できず、かつ生産性が悪い上、上記した複数種のキャッ
プを成形するために、各違う金型を必要とするので、成
形費が高騰し、キャップの価格が高くなる問題がある。
In addition, since the conventional cap is formed as a single unit, a large number of plugs cannot be stored in order, the productivity is low, and the above-mentioned plural types of caps are formed. Since different molds are required, there is a problem that the molding cost rises and the price of the cap increases.

【0005】[0005]

【目的】本発明は、上記した従来の防塵キャップの有す
る問題点に鑑みなされたもので、キャップの構造を、ハ
ウジングとフェルールとの間の隙間に対する複数の嵌合
部を、先端から基板側へ順次段階的に設けて形成し、こ
の複数個のキャップを一体に並設して成形したことによ
り、ハウジングとフェルール間の隙間が大、小異なる何
れのプラグにも使用でき、かつ多数のプラグを整理して
保管できる上に、一種類の金型で複数個を同時に生産性
良く成形できて、安価である防塵キャップを提供するこ
とを目的とする。
SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the conventional dustproof cap, and has been made to reduce the structure of the cap by providing a plurality of fitting portions for the gap between the housing and the ferrule from the tip to the substrate side. By forming and forming these caps integrally and side by side in a stepwise manner, the gap between the housing and the ferrule can be used for both large and small gaps, and many plugs can be used. An object of the present invention is to provide an inexpensive dust-proof cap that can be organized and stored, and that can be simultaneously molded with a single type of mold with high productivity.

【0006】[0006]

【課題を解決するための手段】上記目的を達成するため
に、本発明の防塵キャップは、先端が開口するフェルー
ルの挿入孔を有するキャップにおいて、内径がフェルー
ルの外径よりも大きく、外径がハウジングの大、小異な
る各内径と合致し、かつ各外形が円形の軌跡を有する
大、小異なる複数の嵌合部を、先端から基板側へ順次段
階的に設けて形成し、該キャップを複数個一体に並設、
成形してなることを特徴とする。
In order to achieve the above object, a dustproof cap according to the present invention is a cap having an insertion hole for a ferrule having an open end, wherein the inner diameter is larger than the outer diameter of the ferrule, and the outer diameter is smaller. A plurality of large and small fitting portions that match the inside diameters of the large and small housings and each outer shape has a circular locus are sequentially provided from the tip to the substrate side, and the caps are formed. Side by side,
It is characterized by being formed.

【0007】[0007]

【作用】複数個のキャップは、これら接続部から切り離
すことで、必要に応じて必要な分だけ使用することがで
きる。切り離したキャップは、その嵌合部を、ハウジン
グとフェルールとの間に形成される隙間に嵌合するが、
上記嵌合部の外壁面をハウジングの内周壁面に密嵌する
ことで、当該キャップの内壁面と、フェルールとの間に
隙間が形成され、フェルールを保護する。
A plurality of caps can be cut off from these connecting portions, and can be used as needed as needed. The detached cap fits its fitting portion into the gap formed between the housing and the ferrule,
By closely fitting the outer wall surface of the fitting portion to the inner peripheral wall surface of the housing, a gap is formed between the inner wall surface of the cap and the ferrule, thereby protecting the ferrule.

【0008】基板から一体に突設されている複数の嵌合
部は、外形が最小である第1の嵌合部を先端部に、該第
1の嵌合部の次に外形の大きい第2の嵌合部を、さら
に、この第2の嵌合部よりも外形の大きい第3の嵌合部
等を、先端側から基板側へ順次段階的に設けてあるの
で、プラグの種類によってハウジングとフェルールとの
間の隙間が大、小異なり、この隙間が最小のプラグに
は、先端部の上記第1の嵌合部を、また上記隙間が二番
目に大きいプラグには、上記第2の嵌合部を、さらに、
上記隙間が三番目に大きいプラグには、上記第3の嵌合
部をというように各嵌合することで、上記隙間が大、小
異なる何れのプラグにも一個のキャップを使用できる。
[0008] The plurality of fitting portions integrally projecting from the substrate have a first fitting portion having the smallest outer shape as a leading end portion, and a second fitting portion having the next larger outer shape after the first fitting portion. And a third fitting portion having a larger outer shape than the second fitting portion are provided in a stepwise manner from the front end side to the substrate side. The gap between the ferrule and the ferrule is large or small, and the plug having the smallest gap is provided with the first fitting portion at the tip, and the plug having the second largest gap is provided with the second fitting. The joint,
By fitting each of the plugs having the third largest gap with the third fitting portion, a single cap can be used for any of the plugs having different gaps.

【0009】上記したようにして、フェルールはキャッ
プにて覆われ、外気と遮断された状態で保護されること
によって、空気中の塵や埃等の付着が防止される。
As described above, the ferrule is covered with the cap and protected in a state where it is shut off from the outside air, thereby preventing dust and dirt from adhering to the air.

【0010】[0010]

【発明の実施の形態】以下、本発明に係る防塵キャップ
の実施形態について図面を参照して説明する。図1は防
塵キャップの一使用例の断面図を示し、図2は同上キャ
ップの他の使用例の断面図を示し、図3は同上キャップ
の一実施形態の斜視図を示し、図4は複数個の同上キャ
ップを一体に並設、成形した状態の平面図を示し、図5
は図4に示した状態の正面図を示し、図6は図4におけ
るA−A線矢視拡大断面図を示し、図7は図4における
B−B線矢視拡大断面図を示す。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a dustproof cap according to the present invention will be described with reference to the drawings. 1 shows a cross-sectional view of one use example of the dustproof cap, FIG. 2 shows a cross-sectional view of another use example of the same cap, FIG. 3 shows a perspective view of one embodiment of the same cap, and FIG. FIG. 5 is a plan view showing a state in which the same caps are integrally juxtaposed and molded.
4 shows a front view of the state shown in FIG. 4, FIG. 6 shows an enlarged sectional view taken along line AA in FIG. 4, and FIG. 7 shows an enlarged sectional view taken along line BB in FIG.

【0011】防塵キャップ1は図1ないし図3に示した
ように、円盤状の基板2の片面中心から、光コネクタ用
プラグ5のハウジング6とフェルール7との間に形成さ
れる隙間8に嵌合される複数の嵌合部3、4…を突設し
て一体に形成されている。
As shown in FIGS. 1 to 3, the dustproof cap 1 is fitted into a gap 8 formed between the housing 6 of the optical connector plug 5 and the ferrule 7 from the center of one surface of the disc-shaped substrate 2. A plurality of fitting portions 3, 4,...

【0012】上記光コネクタ用プラグ5は、その種類に
よって上記した隙間8が、図1に示したように小さいも
のと、図2に示したように大きいものと、その他図示し
ないもの等、大きさが大、小異なる(フェルールの径は
同じである)ので、この何れにも使用可能に、上記した
複数の嵌合部3、4は形成されている。
Depending on the type of the optical connector plug 5, the size of the gap 8 described above is small, as shown in FIG. 1, large as shown in FIG. However, since the diameters of the ferrules are different from each other (the diameters of the ferrules are the same), the plurality of fitting portions 3 and 4 are formed so as to be usable in any of them.

【0013】即ち、上記複数の嵌合部3、4…のうち、
一方の嵌合部3は図1に示したように、上記した最小の
隙間8を有するプラグ5に使用可能に、外径をこのプラ
グ5の内径hに合致するように最小に形成されている。
また、他方の嵌合部4は図2に示したように、大きい隙
間8aを有するプラグ5に使用可能に、外径をプラグ5
の内径iに合致するよう大きく形成させてある。
That is, of the plurality of fitting portions 3, 4,...
As shown in FIG. 1, one fitting portion 3 is formed so as to be usable for the plug 5 having the above-described minimum gap 8 and to have an outer diameter that is the smallest so as to match the inner diameter h of the plug 5. .
As shown in FIG. 2, the other fitting portion 4 has an outer diameter of the plug 5 so that it can be used for a plug 5 having a large gap 8a.
Is formed to be large so as to match the inner diameter i.

【0014】そして、外径の小さい嵌合部3は、当該キ
ャップ1の軸方向先端側に、外径の大きい嵌合部4は基
板2側に各位置するよう連設してある。また、上記両嵌
合部3、4は、その表面から内側前方(図1及び図2に
おいて右方向)へ傾斜下降する傾斜面3a、4aを先端
に形成して、ハウジング6の内壁面に沿って、上記隙間
8、8aに円滑に嵌合できるようにしてある。
The fitting portion 3 having a small outer diameter is connected to the distal end side of the cap 1 in the axial direction, and the fitting portion 4 having a large outer diameter is connected to the substrate 2 side. In addition, the fitting portions 3 and 4 are formed with inclined surfaces 3 a and 4 a which incline downward from the surface of the fitting portions 3 and 4 toward the inside (to the right in FIGS. 1 and 2) at their ends, and extend along the inner wall surface of the housing 6. Thus, it can be smoothly fitted into the gaps 8 and 8a.

【0015】さらに、上記した一方の嵌合部3は、図1
ないし図3に示したように、基板2の片面から前方へ一
体に突設した円筒部9の先端部を小径に設けることで円
筒形状に形成され、内部には、先端を開口するフェルー
ル7の挿入用孔10を形成してある。この孔10の内径
jは、フェルール7の外径kよりも所定寸法だけ大きく
形成させてあって、図1及び図2に示したように、キャ
ップ1とフェルール7との間に隙間11が形成されるよ
うに、嵌合部3、4は各々隙間8、8aに嵌合される。
Further, the one fitting portion 3 described above is
As shown in FIG. 3, a cylindrical portion 9 integrally projecting forward from one surface of the substrate 2 is formed into a cylindrical shape by providing a small-diameter distal end portion. An insertion hole 10 is formed. The inner diameter j of the hole 10 is formed to be larger than the outer diameter k of the ferrule 7 by a predetermined dimension, and a gap 11 is formed between the cap 1 and the ferrule 7 as shown in FIGS. So that the fitting portions 3 and 4 are fitted into the gaps 8 and 8a, respectively.

【0016】他方の嵌合部4は、図示例では図3に示し
たように、上記円筒部9の基板2側外周面に複数(図示
例では四個)の突条4b、4b…を周方向へ一定の間隔
をおいて、軸方向へ長く突設することで、その外形が円
形の軌跡をなすように形成させてあるが、これに限るこ
とはなく、例えば一方の嵌合部3と段差を有する円筒状
に形成してもよい。
As shown in FIG. 3, in the illustrated example, a plurality of (four in the illustrated example) protrusions 4b, 4b,... The outer shape is formed so as to form a circular locus by protruding in the axial direction at a constant interval in the direction, but the shape is not limited to this. It may be formed in a cylindrical shape having a step.

【0017】また、上記した一方の嵌合部3は、図示し
た円筒形状以外に、例えば円筒部9の先端から複数の図
示しない突起を、周方向へ一定の間隔をおいて一体に突
設して、外形が円形の軌跡をなすように形成してもよ
い。
The above-mentioned one fitting portion 3 has, in addition to the cylindrical shape shown, a plurality of projections (not shown) integrally protruding from the tip of the cylindrical portion 9 at a constant interval in the circumferential direction. Thus, the outer shape may form a circular locus.

【0018】図示例では、嵌合部3、4を二個設けてあ
るが、これ以外に嵌合部を三個、四個等、所望複数個と
することができる。
In the illustrated example, two fitting portions 3 and 4 are provided, but other than this, a desired number of fitting portions such as three or four may be provided.

【0019】上記構成としたキャップ1は複数個を図4
及び図5に示したように、各基板2…を接続板12…で
接続、並設してプラスチックにて一体に成形し、必要に
応じて必要な分だけ接続板12を切断して切り離して使
用する。因みに、上記した実施形態における光コネクタ
用プラグおよびそのハウジング6には、実質的に同一の
機能を有する光固定減衰器、プラグフレーム、ケーシン
グ、スリーブ等を含むものである。
FIG. 4 shows a plurality of caps 1 having the above structure.
As shown in FIG. 5, the respective substrates 2 are connected by connecting plates 12 and are juxtaposed and integrally formed of plastic, and if necessary, the connecting plates 12 are cut and cut as necessary. use. Incidentally, the optical connector plug and its housing 6 in the above-described embodiment include an optical fixed attenuator, a plug frame, a casing, a sleeve, and the like having substantially the same functions.

【0020】[0020]

【発明の効果】本発明は、以上説明したように構成され
ているので、プラグの種類により、ハウジングとフェル
ールとの間の隙間が大、小異なる、その何れにも使用で
きると共に、複数個を一体に並設して成形し、必要に応
じて必要な分だけ切り離して使用できるので単芯はもと
より二芯、三芯のプラグでも使用でき、しかも複数のプ
ラグを一列に並べることで整理して保管できる上に、一
種の金型のみで成形できるから、成型費を低減できて安
価に提供することができる。
According to the present invention, as described above, the gap between the housing and the ferrule can be large or small depending on the type of the plug. It can be used as a single core as well as a two-core or three-core plug. In addition to being able to be stored, it can be molded using only one type of mold, so that molding costs can be reduced and the cost can be reduced.

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

【図1】本発明に係る防塵キャップの一使用例を示す断
面図である。
FIG. 1 is a sectional view showing an example of use of a dustproof cap according to the present invention.

【図2】同上キャップの他の使用例を示す断面図であ
る。
FIG. 2 is a cross-sectional view showing another usage example of the same cap.

【図3】同上キャップの一実施形態を示す斜視図であ
る。
FIG. 3 is a perspective view showing one embodiment of the same cap.

【図4】同上キャップを複数個並設、成形した状態を示
す平面図である。
FIG. 4 is a plan view showing a state where a plurality of the above caps are juxtaposed and formed.

【図5】図4に示す状態の正面図である。FIG. 5 is a front view of the state shown in FIG. 4;

【図6】図4におけるA−A線矢視拡大断面図である。FIG. 6 is an enlarged sectional view taken along line AA in FIG. 4;

【図7】図4におけるにおけるB−B線矢視拡大断面図
である。
FIG. 7 is an enlarged sectional view taken along line BB in FIG. 4;

【図8】従来の光コネクタ用プラグの防塵キャップの使
用状態を示す断面図である。
FIG. 8 is a cross-sectional view showing a usage state of a dustproof cap of a conventional optical connector plug.

【符号の説明】[Explanation of symbols]

1 防塵キャップ 2 基板 3、4 嵌合部 6 ハウジング 7 フェルール h、i プラグフレームの内径 j キャップの内径 k フェルールの外径 DESCRIPTION OF SYMBOLS 1 Dust-proof cap 2 Substrate 3, 4 Fitting part 6 Housing 7 Ferrule h, i Inner diameter of plug frame j Inner diameter of cap k Outer diameter of ferrule

───────────────────────────────────────────────────── フロントページの続き (72)発明者 中込 弘 東京都渋谷区桜丘町20番1号エヌティティ エレクトロニクス株式会社内 Fターム(参考) 2H036 QA34  ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Hiroshi Nakagomi F-term (reference) 2H036 QA34 in 201-1 Sakuragaoka-cho, Shibuya-ku, Tokyo

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】先端が開口するフェルールの挿入孔を有す
るキャップにおいて、内径がフェルールの外径よりも大
きく、外径がハウジングの大、小異なる各内径と合致
し、かつ各外形が円形の軌跡を有する大、小異なる複数
の嵌合部を、先端から基板側へ順次段階的に設けて形成
し、該キャップを複数個一体に並設、成形してなること
を特徴とする防塵キャップ。
1. A cap having an insertion hole for a ferrule having an open end, wherein the inner diameter is larger than the outer diameter of the ferrule, the outer diameter matches the inner diameter of the housing, which is different from the outer diameter of the housing, and the outer shape is a circular locus. A dustproof cap formed by sequentially forming a plurality of large and small different fitting portions from the front end to the substrate side, and integrally forming a plurality of such caps.
JP19954499A 1999-07-13 1999-07-13 Dustproof cap Expired - Fee Related JP4060992B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19954499A JP4060992B2 (en) 1999-07-13 1999-07-13 Dustproof cap

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19954499A JP4060992B2 (en) 1999-07-13 1999-07-13 Dustproof cap

Publications (2)

Publication Number Publication Date
JP2001027720A true JP2001027720A (en) 2001-01-30
JP4060992B2 JP4060992B2 (en) 2008-03-12

Family

ID=16409601

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19954499A Expired - Fee Related JP4060992B2 (en) 1999-07-13 1999-07-13 Dustproof cap

Country Status (1)

Country Link
JP (1) JP4060992B2 (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007516453A (en) * 2003-07-02 2007-06-21 エーデーシー・テレコミュニケーションズ・インコーポレーテッド Optical fiber cable distribution frame
US7588375B2 (en) * 2003-12-29 2009-09-15 Adc Telecommunications, Inc. Telecommunications connector protective device
US7841775B2 (en) 2003-06-30 2010-11-30 Adc Telecommunications, Inc. Connector storage system
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