JP4368237B2 - Electrical connector - Google Patents

Electrical connector Download PDF

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Publication number
JP4368237B2
JP4368237B2 JP2004132285A JP2004132285A JP4368237B2 JP 4368237 B2 JP4368237 B2 JP 4368237B2 JP 2004132285 A JP2004132285 A JP 2004132285A JP 2004132285 A JP2004132285 A JP 2004132285A JP 4368237 B2 JP4368237 B2 JP 4368237B2
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Prior art keywords
ffc
fpc
separation wall
electrical connector
contact
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JP2005317293A (en
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伸一 安井
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Panasonic Corp
Panasonic Holdings Corp
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Panasonic Corp
Matsushita Electric Industrial Co Ltd
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Priority to JP2004132285A priority Critical patent/JP4368237B2/en
Priority to TW094112342A priority patent/TWI327798B/en
Priority to KR1020050034864A priority patent/KR101107580B1/en
Priority to CN2005100701055A priority patent/CN1691420B/en
Publication of JP2005317293A publication Critical patent/JP2005317293A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/40—Securing contact members in or to a base or case; Insulating of contact members
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/52—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R24/00—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure

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  • Coupling Device And Connection With Printed Circuit (AREA)
  • Connector Housings Or Holding Contact Members (AREA)
  • Multi-Conductor Connections (AREA)

Description

本発明はフレキシブル・フラット・ケーブル（以下、ＦＦＣ）若しくはフレキシブル・プリント・サーキットボード（以下、ＦＰＣ）用の電気コネクタに関する。   The present invention relates to an electrical connector for a flexible flat cable (hereinafter FFC) or a flexible printed circuit board (hereinafter FPC).

図７はＦＦＣあるいはＦＰＣを挿入した状態の従来のコネクタの正面図、図８は図７のＣ−Ｃに沿った断面図である。
この従来の電気コネクタは、ハウジング１と、その接続面よりハウジング内部に向かって形成された端子装着空間に固定、支持された端子のコンタクトビーム２を備え、ハウジング１には前記コンタクトビーム２の各々が交差、接触しない様に分離壁９が設けられている。５は端子の固定部である。 FIG. 7 is a front view of a conventional connector with an FFC or FPC inserted, and FIG. 8 is a cross-sectional view taken along the line CC in FIG.
This conventional electrical connector includes a housing 1 and a contact beam 2 of a terminal fixed and supported in a terminal mounting space formed from the connecting surface toward the inside of the housing. The housing 1 includes each of the contact beams 2. Is provided with a separating wall 9 so that they do not cross or contact each other. Reference numeral 5 denotes a terminal fixing portion.

この分離壁９の高さは、ＦＦＣ，ＦＰＣのベース３の厚さより大きい隙間が端子装着空間の内壁１７との間に確保される寸法に設定され、前記コンタクトビーム２と前記端子装着空間の内壁１７の間に、ＦＦＣ若しくはＦＰＣのベース３を挿入可能に構成され、端子の前記コンタクトビーム２とＦＦＣ若しくはＦＰＣの導電パッド４の電気的接続ができるように構成されている。このような電気コネクタは、（特許文献１）などに記載されている。
特開平８−２７３７７２号公報 The height of the separation wall 9 is set to such a dimension that a gap larger than the thickness of the base 3 of the FFC or FPC is secured between the inner wall 17 of the terminal mounting space and the contact beam 2 and the inner wall of the terminal mounting space. 17, the FFC or FPC base 3 can be inserted, and the contact beam 2 of the terminal can be electrically connected to the FFC or FPC conductive pad 4. Such an electrical connector is described in (Patent Document 1) and the like.
JP-A-8-273772

従来の電気コネクタにおいては、分離壁９の高さが低いため、ＦＦＣ，ＦＰＣのベース３との間に空隙１４が生じて隣接する接点８がお互いに見える関係にあった。そのため、隣接する接点８より空隙１４を通ってお互いにウィスカー１５が成長し接触した場合、端子間の短絡を引き起こすという課題を有している。   In the conventional electrical connector, since the height of the separation wall 9 is low, a gap 14 is formed between the base 3 of the FFC and the FPC so that the adjacent contacts 8 can be seen from each other. For this reason, when the whiskers 15 grow and contact each other through the gap 14 from the adjacent contacts 8, there is a problem of causing a short circuit between the terminals.

昨今の環境問題に対応するため、電気部品の無鉛化が導入されているが、安価で汎用性のあるスズメッキを使用した場合には、ウィスカーが生じ易く隣接端子や箔が短絡することが知られている。特に、電気コネクタのように応力が常に加わっている装置では、応力が加わる接点において長さ１００〜２００μｍというウィスカー１５の著しい成長が観察されており、電気コネクタおよびＦＦＣ，ＦＰＣ表面メッキの無鉛化の動きを妨げている。   In order to respond to recent environmental problems, lead-free electrical components have been introduced. However, it is known that whisker is likely to occur and short-circuited between adjacent terminals and foils when using inexpensive and versatile tin plating. ing. In particular, in an apparatus such as an electrical connector in which stress is constantly applied, significant growth of the whisker 15 having a length of 100 to 200 μm is observed at the contact point where the stress is applied, and the lead-free plating of the electrical connector and FFC / FPC surface plating has been observed. The movement is obstructed.

従って、従来の構成の電気コネクタでは、無鉛化のためにスズメッキを使用した場合、コンタクトビーム２とＦＦＣ，ＦＰＣのベース３との接点８でウィスカーが成長し、隣接するコンタクトビーム２の間の前記空隙に向かって成長して接触することで、電気回路の短絡を起こすという問題がある。   Therefore, in the conventional electrical connector, when tin plating is used for lead-free, whiskers grow at the contact 8 between the contact beam 2 and the base 3 of the FFC or FPC, and the above-mentioned contact between the adjacent contact beams 2 There is a problem that an electrical circuit is short-circuited by growing and contacting toward the gap.

また、この短絡を防ぐために、端子の表面にウィスカーの発生しない金メッキを使う場合もあり、この場合には電気コネクタの価格が高価になるという問題がある。
本発明は斯かる問題点に鑑みてなされたもので、スズメッキなどの無鉛化メッキのＦＦＣやＦＰＣを保持する際に常時加わっている応力によってウィスカーが成長しても隣接するコンタクトプレート間の短絡が起きない電気コネクタを提供することを目的としている。 In addition, in order to prevent this short circuit, gold plating that does not generate whiskers may be used on the surface of the terminal. In this case, there is a problem that the price of the electrical connector is expensive.
The present invention has been made in view of such problems, and even if whiskers grow due to stress constantly applied when holding an FFC or FPC of lead-free plating such as tin plating, a short circuit between adjacent contact plates is caused. It aims to provide an electrical connector that does not happen.

本発明の請求項１記載の電気コネクタは、幅方向に細長い絶縁性のハウジングに、フレキシブル・フラット・ケーブル（ＦＦＣ），フレキシブル・プリント・サーキットボード（ＦＰＣ）の接続端部を挿入できる接続孔を形成し、前記接続孔より前記ハウジング内部に向かって形成された端子装着空間に装着された複数の端子を備え、隣接する前記端子が接触しないよう前記端子間に分離壁を有する電気コネクタにおいて、前記分離壁は、基端が先端よりも厚く、前記基端から前記先端へ向かうに連れて薄くなり、その方向に平行な断面形状が三角形状をした伸長分離壁を有し、前記伸長分離壁の先端と前記ハウジング内壁との間隔を、前記フレキシブル・フラット・ケーブル（ＦＦＣ），フレキシブル・プリント・サーキットボード（ＦＰＣ）のベース厚みより小さく設定したことを特徴とし、ＦＦＣ，ＦＰＣが挿入された場合にＦＦＣ，ＦＰＣの導電パット間に位置する絶縁部と伸長分離壁を密着させ、各端子およびＦＦＣ，ＦＰＣの導電パッドが周囲を閉塞された空間に存在するように構成できる。 The electrical connector according to claim 1 of the present invention has a connection hole into which a connection end of a flexible flat cable (FFC) or a flexible printed circuit board (FPC) can be inserted into an insulating housing elongated in the width direction. formed, the connecting hole comprises a a plurality of terminals mounted in the terminal mounting space formed toward the inner housing, the electrical connector having a separation wall between the to the terminal neighboring does not contact the terminal, wherein The separation wall has an elongated separation wall whose proximal end is thicker than the distal end, becomes thinner as it goes from the proximal end toward the distal end, and has a triangular sectional shape parallel to the direction . The distance between the tip and the inner wall of the housing is determined by the flexible flat cable (FFC), flexible printed circuit board (FP). ) Is set smaller than the base thickness, and when the FFC and FPC are inserted, the insulating portion located between the conductive pads of the FFC and FPC and the extension separation wall are brought into close contact with each other and the conductivity of each terminal and the FFC and FPC. The pad can be configured to exist in a closed space.

すなわち本態様によれば、コンタクトビームとＦＦＣ，ＦＰＣの接点を中心としてＦＦＣ，ＦＰＣの挿入方向で前後にそれぞれ２００μ以上のＦＦＣ，ＦＰＣ絶縁部と密着した伸長分離壁を有することで、接点よりウィスカーが成長しても隣接するコンタクトビームとの短絡は起きない利点がある。   That is, according to the present aspect, the whisker is provided more than the whisker by having the extension separation wall in close contact with the FFC / FPC insulating portion of 200 μm or more in the insertion direction of the FFC / FPC around the contact of the contact beam and the FFC / FPC. Even if it grows, there is an advantage that a short circuit with an adjacent contact beam does not occur.

また本態様によれば、前記分離壁は、基端が先端よりも厚く、前記基端から前記先端へ向かうに連れて薄くなり、その方向に平行な断面形状が三角形状をした伸長分離壁を有し、フレキシブル・フラット・ケーブル（ＦＦＣ），フレキシブル・プリント・サーキットボード（ＦＰＣ）の導電パット間に位置する絶縁部の幅が狭くても導電パットに乗り上げること無く絶縁部のみと密着する利点がある。 Further, according to this aspect, the separation wall has an elongated separation wall whose base end is thicker than the distal end, becomes thinner as it goes from the proximal end to the distal end, and whose cross-sectional shape parallel to the direction is a triangular shape. Has the advantage that it adheres only to the insulating part without riding on the conductive pad even if the width of the insulating part located between the conductive pads of the flexible flat cable (FFC) and flexible printed circuit board (FPC) is narrow There is .

さらに前記分離壁は、樹脂成形で作られることの多い分離壁の射出成形時における溶融樹脂の流れ込みにも良好であり、流れ込み不良による分離壁の形状不完全が生じない利点がある。 Furthermore, the separation wall is excellent in the flow of molten resin at the time of injection molding of the separation wall which is often made by resin molding, and there is an advantage that the shape of the separation wall is not incomplete due to poor flow.

本発明の請求項２記載の電気コネクタは、請求項１において、前記分離壁は、少なくとも前記フレキシブル・フラット・ケーブル（ＦＦＣ）、フレキシブル・プリント・サーキットボード（ＦＰＣ）の素材より硬度の高い素材で成形したことを特徴とし、ＦＦＣ，ＦＰＣを電気コネクタに挿入した状態で伸長分離壁の先端がＦＦＣ，ＦＰＣの絶縁部に食込み、絶縁部を塑性変形あるいは弾性変形させることで、分離壁と絶縁部の密着性をより確実なものとできる。 The electrical connector according to claim 2 of the present invention, Oite to claim 1, wherein the separation wall, at least the flexible flat cable (FFC), higher hardness than the material of the flexible printed circuit board (FPC) It is characterized in that it is molded with a material, and with the FFC and FPC inserted into the electrical connector, the distal end of the extension separation wall bites into the insulation part of the FFC and FPC, and the insulation part is plastically deformed or elastically deformed. The adhesion of the insulating part can be made more reliable.

本発明の請求項３記載の電気コネクタは、請求項１において、前記分離壁は、少なくとも前記フレキシブル・フラット・ケーブル（ＦＦＣ）、フレキシブル・プリント・サーキットボード（ＦＰＣ）の素材より硬度の低い素材で形成したことを特徴とし、ＦＦＣ，ＦＰＣを電気コネクタに挿入した状態で分離壁の先端が押し潰され塑性変形あるいは弾性変形することで、ＦＦＣ，ＦＰＣの絶縁部と分離壁の密着性をより確実なものにできる。 The electrical connector according to claim 3 of the present invention, Oite to claim 1, wherein the separation wall, at least the flexible flat cable (FFC), low hardness than the material of the flexible printed circuit board (FPC) It is made of a material, and the tip of the separation wall is crushed and plastically deformed or elastically deformed with the FFC and FPC inserted into the electrical connector, thereby improving the adhesion between the insulating portion of the FFC and FPC and the separation wall. It can be made more reliable.

本発明の請求項４記載の電気コネクタは、請求項２および請求項３において、前記分離壁は、前記ハウジングとは異なる絶縁性の部材で形成したことを特徴とし、ハウジング部にはハウジング本来の機能を優先した材料を使い、分離壁にはＦＦＣ，ＦＰＣの絶縁部と硬度差を付与した密着性を優先した材料を使えるものである。 According to a fourth aspect of the present invention, the electrical connector according to the second or third aspect is characterized in that the separation wall is formed of an insulating member different from the housing, and the housing portion has an intrinsic property of the housing. A material that prioritizes function is used, and a material that prioritizes adhesion with a difference in hardness from the FFC and FPC insulation parts can be used for the separation wall.

本発明の請求項１の発明では、電気コネクタにＦＦＣ，ＦＰＣが挿入された場合、ＦＦＣ，ＦＰＣの導電パットと端子先端が接する接点周囲が、伸長分離壁とＦＦＣ，ＦＰＣベースの密着により閉塞された空間となることで、この閉塞された空間が接点を中心としてＦＦＣ，ＦＰＣの挿入方向で前後にそれぞれ２００μ以上の密着した分離壁を有することで、接点よりウィスカーが成長しても隣接するコンタクトビームあるいは接点との短絡は起きない効果がある。そのため、端子およびＦＦＣ，ＦＰＣの表面メッキに安価に無鉛化可能なスズメッキを使用できる利点がある。   According to the first aspect of the present invention, when the FFC or FPC is inserted into the electrical connector, the periphery of the contact point where the FFC or FPC conductive pad and the terminal tip contact is closed by the contact between the extension separation wall and the FFC or FPC base. Since this closed space has close contact walls of 200 μm or more in the FFC and FPC insertion directions around the contact, the adjacent contact even if the whisker grows from the contact There is an effect that a short circuit with a beam or a contact does not occur. Therefore, there is an advantage that tin plating that can be made lead-free at low cost can be used for surface plating of terminals and FFC and FPC.

また、本発明の請求項１記載の発明では、分離壁が、基端が先端よりも厚く、前記基端から前記先端へ向かうに連れて薄くなり、その方向に平行な断面形状が三角形状をした伸長分離壁を有することで、ＦＦＣ，ＦＰＣの導電パット間の絶縁部の幅が狭い小型の電気コネクタでも伸長分離壁が確実に絶縁部のみと当接するという効果を持つと共に成形を行ない易いという効果を持つ。 Further, in the first aspect of the present invention of the present invention, the separation wall is thicker than the tip proximal end, it becomes thinner as you go from the proximal to the distal end, a triangular cross section parallel shape in that direction By having the extended separating wall, even with a small electrical connector having a narrow insulating portion width between the conductive pads of the FFC and FPC, it has the effect that the extending and separating wall surely contacts only the insulating portion and is easy to mold. Has an effect.

本発明の請求項２および請求項３の発明は、伸長分離壁の材料をＦＦＣ，ＦＰＣの絶縁部材料より硬くあるいは軟らかくすることで、ＦＦＣ，ＦＰＣを電気コネクタに挿入した状態で伸長分離壁の先端がＦＦＣ，ＦＰＣの絶縁部に食込み、あるいは伸長分離壁自身が弾性的、塑性的に変形することで、伸長分離壁の寸法が変形量より小さい量でばらついても絶縁部との密着を維持できる。 According to the second and third aspects of the present invention, the material of the extension separation wall is made harder or softer than the insulating material of the FFC or FPC, so that the extension separation wall is inserted into the electrical connector. The tip bites into the insulation part of the FFC or FPC, or the extension / separation wall itself deforms elastically and plastically, so that the extension / separation wall maintains its close contact with the insulation part even if the dimension of the extension / separation wall is smaller than the deformation amount. it can.

以下、本発明の各実施の形態を図１〜図６に基づいて説明する。
（実施の形態１）
図１と図２は本発明の（実施の形態１）の電気コネクタを示している。 Hereinafter, each embodiment of the present invention will be described with reference to FIGS.
(Embodiment 1)
1 and 2 show an electrical connector of (Embodiment 1) of the present invention.

図１は正面図、図２は図１のＡ−Ａ線に沿った断面図である。
この電気コネクタは、幅方向に細長い直方体ブロックとして樹脂成形する絶縁性のハウジング１と、ハウジング１に固定部５でそれぞれ複数個装着された端子１０で構成されている。端子１０は無鉛半田などで回路基板（図示せず）と接合する接合部１３を有している。 1 is a front view, and FIG. 2 is a cross-sectional view taken along the line AA in FIG.
This electrical connector includes an insulating housing 1 that is resin-molded as a rectangular parallelepiped block that is elongated in the width direction, and a plurality of terminals 10 that are mounted on the housing 1 by fixing portions 5. The terminal 10 has a joint 13 that joins a circuit board (not shown) with lead-free solder or the like.

ハウジング１は絶縁性の樹脂を箱型に成形してなるもので、上面に接続孔としての開口部１６とそこから内部に伸びる壁部１７および隣り合う端子１０がお互いに交錯して当接しない様に分離する分離壁９により内部空洞１８が形成され、端子１０は開口部１６の近傍にて曲率を持って概略１８０°曲げられ弾性を有するコンタクトビーム２を有し、その弾性によって接点８は壁部１７と当接する様配置されている。   The housing 1 is formed by molding an insulating resin into a box shape, and an opening 16 as a connection hole, a wall 17 extending inward from the inside, and an adjacent terminal 10 do not cross each other and come into contact with each other. An internal cavity 18 is formed by the separating wall 9 that is separated in this manner, and the terminal 10 has an elastic contact beam 2 that is bent by approximately 180 ° with a curvature in the vicinity of the opening 16, and the contact 8 is formed by the elasticity. It arrange | positions so that the wall part 17 may be contact | abutted.

前記端子１０は主として弾性を有する銅合金で形成され、その表面は半田との親和性を持ち錆を防ぐために、また無鉛化への環境問題に対応すべくスズメッキを施されたものである。   The terminal 10 is mainly made of an elastic copper alloy, and its surface is tin-plated in order to have an affinity with solder and prevent rust, and to cope with environmental problems for lead-free.

ハウジング１と一体で成形された分離壁９は、基端を先端よりも厚く、内部空洞１８中央に向かって徐々に薄肉となって伸長し断面が三角形状をした伸長分離壁６を有している。   The separation wall 9 formed integrally with the housing 1 has an elongated separation wall 6 having a proximal end thicker than the distal end and gradually becoming thinner toward the center of the internal cavity 18 and having a triangular cross section. Yes.

伸長分離壁６の先端部７と前記壁部１７の距離ｔは、図３のＦＣＣ，ＦＰＣベース３の厚さｔ１より若干小さく構成されている。
本構成の電気コネクタに挿入されるＦＦＣあるいはＦＰＣは、図３に示すように絶縁性の樹脂であるポリイミド、ポリエチレンテレフタレート、酢酸ビニルなどを素材とし、厚さｔ１に均一延展されたベース３上に、銅箔あるいは薄い銅板で形成され表面にスズメッキされた無鉛化仕様の導電パッド４を固着して作られる。 The distance t between the distal end portion 7 of the extension separation wall 6 and the wall portion 17 is configured to be slightly smaller than the thickness t1 of the FCC / FPC base 3 in FIG.
As shown in FIG. 3, the FFC or FPC inserted into the electrical connector of this configuration is made of an insulating resin such as polyimide, polyethylene terephthalate, or vinyl acetate on the base 3 that is uniformly extended to a thickness t1. It is made by fixing a lead-free conductive pad 4 formed of copper foil or a thin copper plate and tin-plated on the surface.

本構成の電気コネクタに前記ＦＦＣ，ＦＰＣを挿入した状態を正面から見た状態を図４に示す。図５は図４のＢ−Ｂ線に沿った断面図を示したものである。
ハウジング１の開口部１６より底面１２の方向に挿入されるＦＦＣ，ＦＰＣベース３は、挿入と同時に弾性を持つコンタクトビーム２の押し圧力で押され、ＦＦＣ，ＦＰＣベース３上に形成された導電パット４と接点８で当接しつつハウジング１の壁部１７との間であらかじめ定められた圧力を受けながら内部空洞１８を底面１２の方向に進行し、底面１２近傍の所定の位置で挿入を停止する。 FIG. 4 shows a state where the FFC and FPC are inserted into the electrical connector of this configuration as viewed from the front. FIG. 5 is a sectional view taken along line BB in FIG.
The FFC / FPC base 3 inserted in the direction of the bottom surface 12 from the opening 16 of the housing 1 is pressed by the pressing force of the contact beam 2 having elasticity simultaneously with the insertion, and a conductive pad formed on the FFC / FPC base 3. 4 and the contact 8 while abutting at a predetermined pressure between the wall portion 17 of the housing 1 while moving in the direction of the bottom surface 12 while receiving a predetermined pressure, the insertion is stopped at a predetermined position near the bottom surface 12. .

接点８はＦＦＣ，ＦＰＣベース３が電気コネクタから抜けるのを防ぎ、導電パット４を介して回路基板との電気的な導通を行なう。
また同様に挿入時には、ＦＦＣ，ＦＰＣベース３より硬い材料で作られたハウジング１と一体の伸長分離壁６が、ＦＦＣ，ＦＰＣの絶縁部１１に当接するとともにＦＦＣ．ＦＰＣベース３を塑性変形あるいは弾性変形させながら挿入が進行し前記所定の位置にＦＦＣ，ＦＰＣベース３が到達した後も伸長分離壁６がＦＦＣ，ＦＰＣベース３に食込んだ状態を維持する。 The contact 8 prevents the FFC / FPC base 3 from being disconnected from the electrical connector, and conducts electrical continuity with the circuit board via the conductive pad 4.
Similarly, at the time of insertion, the extension separation wall 6 integrated with the housing 1 made of a material harder than the FFC / FPC base 3 is in contact with the insulating portion 11 of the FFC / FPC and the FFC. Insertion proceeds while the FPC base 3 is plastically deformed or elastically deformed, and the extended separation wall 6 remains in the FFC / FPC base 3 even after the FFC / FPC base 3 reaches the predetermined position.

従って、ＦＦＣ，ＦＰＣベース３の絶縁部１１は図４で示すように伸長分離壁６を包むように盛り上がり、密着性を保つ。図５の断面図によれば、ＦＦＣ，ＦＰＣベース３と伸長分離壁６の密着は、接点８を中心にＦＦＣ，ＦＰＣの挿入方向に前後０．２ｍｍ以上維持されることから接点８はＦＦＣ，ＦＰＣの進行方向以外の四方を絶縁性の樹脂でできた壁で囲まれるように構成されている。このため接点８よりウィスカー１５がこれまでの観測上最大と考えられている２００μｍ（＝０．２ｍｍ）に成長した場合でも、隣接する端子間での短絡を防ぐことが出来る。   Accordingly, the insulating portion 11 of the FFC / FPC base 3 rises so as to wrap around the extension separation wall 6 as shown in FIG. According to the cross-sectional view of FIG. 5, the contact between the FFC / FPC base 3 and the extension separation wall 6 is maintained at 0.2 mm or more in the FFC / FPC insertion direction around the contact 8. The four sides other than the traveling direction of the FPC are surrounded by a wall made of an insulating resin. For this reason, even when the whisker 15 grows to 200 μm (= 0.2 mm), which is considered to be the maximum in the observation so far, from the contact 8, a short circuit between adjacent terminals can be prevented.

なお、前記伸長分離壁６の断面が三角形状を成すのは、ＦＦＣ，ＦＰＣのベース３への食込みを容易にするだけでなく、ハウジング１の小型化、薄型化に伴い端子間１０の間隔が小さくなった電気コネクタにおいて、ＦＦＣ，ＦＰＣの絶縁部１１の幅が狭くても、伸長分離壁６が導電パット４に乗り上げること無く絶縁部１１のみと密着するのを容易にするためである。さらに、この伸長分離壁６の断面が三角形状を成すのは、樹脂成形の方法で作製される伸長分離壁の先端７の薄肉部にも溶融樹脂の流れ込みを容易にし、形状不完全を生じないためである。   The reason why the cross section of the elongated separation wall 6 is triangular is that not only the FFC and FPC can be easily bitten into the base 3, but the distance between the terminals 10 is increased as the housing 1 is made smaller and thinner. This is because, in the reduced electrical connector, even if the width of the insulating portion 11 of the FFC or FPC is narrow, it is easy to make the extension separation wall 6 come into close contact with only the insulating portion 11 without riding on the conductive pad 4. Further, the cross section of the elongated separation wall 6 has a triangular shape, which facilitates the flow of the molten resin into the thin wall portion of the distal end 7 of the elongated separation wall produced by the resin molding method, and does not cause incomplete shape. Because.

（実施の形態２）
図６は本発明の（実施の形態２）の電気コネクタを示し、（実施の形態１）と同一の箇所については同一の符号を付けて説明する。 (Embodiment 2)
FIG. 6 shows an electrical connector according to (Embodiment 2) of the present invention, and the same parts as those in (Embodiment 1) will be described with the same reference numerals.

この（実施の形態２）は、ハウジング１と一体で成形される伸長分離壁６の材料をＦＦＣ，ＦＰＣベース３より軟らかい材料で作るところが（実施の形態１）とは異なる。
この構成によると、ＦＦＣ，ＦＰＣを電気コネクタに挿入する際、ＦＦＣ，ＦＰＣベース３の表面によって、軟らかい伸長分離壁６の先端部７が弾性変形あるいは塑性変形してＦＦＣ，ＦＰＣベース３の絶縁部１１に密着するため、ＦＦＣ，ＦＰＣの挿入完了後は接点８を中心にＦＦＣ，ＦＰＣの挿入方向に前後０．２ｍｍ以上の密着が維持され、接点８はＦＦＣ，ＦＰＣの進行方向以外の四方を絶縁性の樹脂でできた壁で囲まれるように構成される。 This (Embodiment 2) differs from (Embodiment 1) in that the material of the elongated separation wall 6 formed integrally with the housing 1 is made of a material softer than the FFC / FPC base 3.
According to this configuration, when the FFC and FPC are inserted into the electrical connector, the front end portion 7 of the soft extension separation wall 6 is elastically deformed or plastically deformed by the surface of the FFC and FPC base 3, so that the insulating portion of the FFC and FPC base 3 11 after the insertion of the FFC and FPC is completed, the close contact of 0.2 mm or more in the FFC and FPC insertion direction is maintained around the contact 8, and the contact 8 has four sides other than the FFC and FPC traveling directions. It is configured to be surrounded by a wall made of insulating resin.

従って、（実施の形態１）と同様に接点８より成長するウィスカー１５による隣接端子どうしの短絡を防止できるという効果が得られる。
なお、伸長分離壁６の断面が三角形状を成すことで、ＦＦＣ，ＦＰＣのベース３との当接で伸長分離壁の先端７が容易に変形するものである。 Therefore, as in (Embodiment 1), it is possible to prevent the adjacent terminals from being short-circuited by the whisker 15 growing from the contact 8.
In addition, when the cross section of the extended separation wall 6 forms a triangular shape, the distal end 7 of the extended separation wall is easily deformed by contact with the base 3 of the FFC or FPC.

なお、上記の各実施の形態において、伸長分離壁６とハウジング１は一体で形成しているが、ハウジング１としての複数の端子１０を保持しＦＦＣ，ＦＰＣの導電パッド４との電気的な導通を維持する本来の機能を重視した場合には、伸長分離壁６を一体ではなくそれぞれ独立した部材で作り接合する方法が考えられる。すなわちハウジング１は公知である電気コネクタ本来の機能に適した材料で作製し、伸長分離壁６にＦＦＣ，ＦＰＣベース３より硬い絶縁性の樹脂を使う、あるいは軟らかい絶縁性の樹脂を使うことで、電気コネクタの性能を変えることなくウィスカー１５による隣接端子の短絡を防ぐことができる。   In each of the above-described embodiments, the extension separation wall 6 and the housing 1 are integrally formed. However, the plurality of terminals 10 as the housing 1 are held and electrically connected to the conductive pads 4 of the FFC and FPC. In the case where the original function of maintaining the above is emphasized, a method is conceivable in which the elongated separation walls 6 are made of independent members instead of being integrated. That is, the housing 1 is made of a known material suitable for the original function of the electrical connector, and an insulating resin harder than the FFC / FPC base 3 is used for the extension separation wall 6 or a soft insulating resin is used. Short-circuiting of adjacent terminals by the whisker 15 can be prevented without changing the performance of the electrical connector.

本発明の電気コネクタによれば、端子とＦＦＣあるいはＦＰＣの導電パットとの接点よりウィスカーが成長しても隣接する端子あるいは接点との短絡は起きない効果を有するので、端子およびＦＦＣ，ＦＰＣの表面メッキに安価なスズメッキを使用でき、産業界の無鉛化の促進に寄与できるものである。   According to the electrical connector of the present invention, even if the whisker grows from the contact point between the terminal and the conductive pad of the FFC or FPC, there is an effect that a short circuit does not occur with the adjacent terminal or contact point. Inexpensive tin plating can be used for plating, which can contribute to the promotion of lead-free industry.

本発明の（実施の形態１）の正面図Front view of (Embodiment 1) of the present invention 図１のＡ−Ａ線に沿った断面図Sectional drawing along the AA line of FIG. ＦＦＣあるいはＦＰＣの外観斜視図External perspective view of FFC or FPC 同実施の形態でＦＦＣが挿入された状態の正面図Front view with FFC inserted in the same embodiment 図４のＢ−Ｂ線に沿った断面図Sectional drawing along the BB line of FIG. 本発明の（実施の形態２）でＦＦＣが挿入された状態の正面図Front view of FFC inserted in (Embodiment 2) of the present invention 従来の電気コネクタにＦＦＣが挿入された状態の正面図Front view of FFC inserted in conventional electrical connector 図７のＣ−Ｃ線に沿った断面図Sectional view along CC line of FIG.

符号の説明Explanation of symbols

１ ハウジング
２ コンタクトビーム（端子）
３ ＦＦＣあるいはＦＰＣのベース
４ 導電パット
５ 固定部
６ 伸長分離壁
７ 伸長分離壁の先端
８ 接点
９ 分離壁
１０ 端子
１１ 絶縁部
１２ 底面
１３ 接合部
１４ 空隙
１５ ウィスカー
１６ 開口部
１７ 壁部
１８ 内部空洞
ｔ 伸長分離壁と壁面の距離
ｔ１ ＦＦＣあるいはＦＰＣの絶縁部の厚さ 1 Housing 2 Contact beam (terminal)
3 Base of FFC or FPC 4 Conductive pad 5 Fixed portion 6 Elongation separation wall 7 Elongation separation wall tip 8 Contact 9 Separation wall 10 Terminal 11 Insulation portion 12 Bottom surface 13 Joint portion 14 Air gap 15 Whisker 16 Opening portion 17 Wall portion 18 Internal cavity t Distance between the extension separation wall and the wall surface t1 Thickness of the insulating part of the FFC or FPC

Claims (4)

幅方向に細長い絶縁性のハウジングに、フレキシブル・フラット・ケーブル（ＦＦＣ），フレキシブル・プリント・サーキットボード（ＦＰＣ）の接続端部を挿入できる接続孔を形成し、前記接続孔より前記ハウジング内部に向かって形成された端子装着空間に装着された複数の端子を備え、隣接する前記端子が接触しないよう前記端子間に分離壁を有する電気コネクタにおいて、
前記分離壁は、基端が先端よりも厚く、前記基端から前記先端へ向かうに連れて薄くなり、その方向に平行な断面形状が三角形状をした伸長分離壁を有し、
前記伸長分離壁の先端と前記ハウジング内壁との間隔を、前記フレキシブル・フラット・ケーブル（ＦＦＣ），フレキシブル・プリント・サーキットボード（ＦＰＣ）のベース厚みより小さく設定した電気コネクタ。 A connecting hole into which a connecting end portion of a flexible flat cable (FFC) or a flexible printed circuit board (FPC) can be inserted is formed in an insulating housing that is elongated in the width direction. In an electrical connector comprising a plurality of terminals mounted in a terminal mounting space formed in such a manner that a separation wall is provided between the terminals so that adjacent terminals do not contact each other.
The separation wall has an elongated separation wall whose base end is thicker than the front end, becomes thinner as it goes from the base end to the front end, and whose cross-sectional shape parallel to that direction is a triangular shape,
An electrical connector in which a distance between a distal end of the extension separation wall and an inner wall of the housing is set smaller than a base thickness of the flexible flat cable (FFC) or the flexible printed circuit board (FPC). 前記分離壁は、少なくとも前記フレキシブル・フラット・ケーブル（ＦＦＣ）、フレキシブル・プリント・サーキットボード（ＦＰＣ）の素材より硬度の高い素材で成形した請求項１に記載の電気コネクタ。 The electrical connector according to claim 1, wherein the separation wall is formed of a material having a hardness higher than that of at least the flexible flat cable (FFC) and the flexible printed circuit board (FPC) . 前記分離壁は、少なくとも前記フレキシブル・フラット・ケーブル（ＦＦＣ）、フレキシブル・プリント・サーキットボード（ＦＰＣ）の素材より硬度の低い素材で形成した請求項１に記載の電気コネクタ。 The electrical connector according to claim 1 , wherein the separation wall is formed of a material having a hardness lower than that of at least the flexible flat cable (FFC) and the flexible printed circuit board (FPC). 前記分離壁は、前記ハウジングとは異なる絶縁性の部材で形成した請求項２または３に記載の電気コネクタ。 The electrical connector according to claim 2 , wherein the separation wall is formed of an insulating member different from the housing .
JP2004132285A 2004-04-28 2004-04-28 Electrical connector Expired - Fee Related JP4368237B2 (en)

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