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JP3901855B2 - Shield terminal - Google Patents

Shield terminal Download PDF

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Publication number
JP3901855B2
JP3901855B2 JP22624298A JP22624298A JP3901855B2 JP 3901855 B2 JP3901855 B2 JP 3901855B2 JP 22624298 A JP22624298 A JP 22624298A JP 22624298 A JP22624298 A JP 22624298A JP 3901855 B2 JP3901855 B2 JP 3901855B2
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Prior art keywords
wire
shield terminal
braided wire
terminal
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JP22624298A
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JP2000058153A (en
Inventor
稔禎 村山
康路 ▲桑▼山
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Yazaki Corp
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Yazaki Corp
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Priority to JP22624298A priority Critical patent/JP3901855B2/en
Priority to DE1999137100 priority patent/DE19937100C2/en
Priority to GB9918750A priority patent/GB2340674B/en
Publication of JP2000058153A publication Critical patent/JP2000058153A/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
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/10—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation
    • H01R4/18—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping
    • H01R4/187—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping combined with soldering or welding
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/02—Soldered or welded connections
    • H01R4/023—Soldered or welded connections between cables or wires and terminals
    • H01R4/024—Soldered or welded connections between cables or wires and terminals comprising preapplied solder
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/02—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for soldered or welded connections
    • H01R43/0207—Ultrasonic-, H.F.-, cold- or impact welding

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  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
  • Multi-Conductor Connections (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Manufacturing Of Electrical Connectors (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は、シールド電線の接合構造並びに接合方法及び該接合に用いるシールド端子に関する。
【０００２】
【従来の技術】
この種のシールド電線の端末処理構造として、図１０（ａ），（ｂ）に示す特開平７−２０１３８３号公報に開示されたものがある。このシールド電線１は、導体からなる芯線部２と、この芯線部２を覆う絶縁内皮３と、この絶縁内皮３の周囲に設けられた編組線４と、この編組線４の周囲に設けられて該編組線４を覆う絶縁外皮５とから構成されている。
【０００３】
そして、このシールド電線１の端末部分の絶縁外皮５の一部を除去して絶縁内皮３と編組線４とに分離し、絶縁内皮３の端末より露出した芯線部２及び編組線４の各端末に各端子金具６をそれぞれ加締めて接続するようになっている。この編組線４の端末側に端子金具６を加締めて接続する前に、該編組線４の端末部分を熱により収縮する熱収縮チューブ７を介して結束させている。
【０００４】
【発明が解決しようとする課題】
しかしながら、前記従来のシールド電線１の端末処理構造では、絶縁内皮３より編組線４を分離した後で該編組線４の端末に端子金具６を加締めているため、加締め時に編組線４を損傷させる虞があると共に、シールドされていない部分が発生した。また、編組線４の端末側を束ねるために熱収縮チューブ７等の結束部材が必要不可欠となり、加工作業性が悪かった。
【０００５】
そこで、本発明は、前記した課題を解決すべくなされたものであり、編組線の露出部へのシールド端子の接合を該編組線を損傷させることなく容易かつ確実に行うことができるシールド端子を提供することを目的とする。
【００１０】
【課題を解決するための手段】
請求項１発明は、導体からなる芯線部と、この芯線部を覆う絶縁内皮と、この絶縁内皮の周囲に設けられた編組線と、この編組線の周囲に設けられて該編組線を覆う絶縁外皮とからなるシールド電線の所定の接地位置に、超音波加振により溶融される低融点接合材を介して接合されるシールド端子において、前記低融点接合材が塗布されると共に前記編組線に加締められて接合される加締め部と、この加締め部に連設されて接地相手に接続される接続部とを備え、前記加締め部の内面にその外周に沿う環状突出部を設けたことを特徴とする。
【００１１】
このシールド端子では、加締め部によりシールド電線の端末や中間位置等の各接地位置の接合処理が容易かつ確実に行われる。特に、シールド端子の加締め部の内面に塗布される低融点接合材の溶融時に、該溶融した低融点接合材の外部への流出が環状突出部により確実に防止される。これにより、シールド端子の加締め部とシールド電線の編組線との電気的・強度的な接続信頼性が大幅に向上する。
【００１６】
【発明の実施の形態】
以下、本発明の実施形態を図面に基づいて説明する。
【００１７】
図１（ａ）は本発明の実施形態のシールド電線の接合構造を示す斜視図、図１（ｂ）は同図１（ａ）中Ｘ−Ｘ線に沿う断面図、図１（ｃ）は同接合構造に用いられるシールド端子の斜視図、図２（ａ）は同接合構造に用いられるシールド電線の斜視図、図２（ｂ）は同シールド電線と同シールド端子の接合前の状態を示す斜視図、図２（ｃ）は同接合後の状態を示す斜視図である。
【００１８】
図１（ａ），（ｂ）及び図２（ａ），（ｂ），（ｃ）に示すように、上記接合構造に用いられるシールド電線１０は、導体からなる芯線部１１と、この芯線部１１を覆う絶縁内皮１２と、この絶縁内皮１２の周囲に設けられ、径の細い複数の素線でクロス状に編まれた編組線１３と、この編組線１３の周囲に設けられて該編組線１３を覆う絶縁外皮１４とから構成されている。このシールド電線１０の端末（接地位置）Ａ側の絶縁外皮１４の一部は除去されていて、芯線部１１の一部が露出している。この露出した芯線部１１の端末Ａには端子金具１５の一対の加締め部１５ａ，１５ａを加締めてある。また、端子金具１５の雄タブ部（接続部）１５ｂはコネクタ１６のフード部１６ａ内に装着突出されて図示しない相手側の雌端子等に電気的に接続されるようになっている。
【００１９】
さらに、シールド電線１０の端末Ａの絶縁外皮１４と絶縁内皮１２との間の編組線１３の一部も露出している。この編組線１３の露出部にはシールド端子２０を接合自在にしてある。図１（ｃ）に示すように、シールド端子２０は、低融点接合材２３が塗布されると共に編組線１３の露出部に加締められて金属接合される正面略Ｕ字状で一対の加締め部２１，２１と、この一対の加締め部２１，２１間の底部中央の一側端に一体形成されて図示しない接地相手に接続される平面Ｌ字状の雄タブ部（接続部）２２とを備えている。この一対の加締め部２１，２１は相対向する位置に向き合うように折り曲げられていて、その各内面２１ａに超音波加振により溶融される半田等の低融点接合材２３をそれぞれ塗布してある。
【００２０】
そして、このシールド端子２０をシールド電線１０に接続する接合方法について説明すると、まず、図２（ａ）に示すように、シールド電線１０の端末（接地位置）Ａの絶縁外皮１４の一部を除去して編組線１３の端末側の一部を露出させる。次に、図２（ｂ）に示すように、この編組線１３の露出部にシールド端子２０の一対の加締め部２１，２１を挿入してセットし、超音波ホーン３０の下側の円弧面３０ａとアンビル３１の上側の円弧面３１ａとの間に挟み、加圧しながら超音波加振する。この超音波ホーン３０とアンビル３１によってシールド端子２０の一対の加締め部２１，２１を加締めながら超音波加振すると、その超音波エネルギーによって内部発熱を起こし、この内部発熱により一対の加締め部２１，２１に塗布された低融点接合材２３が溶融する。この溶融した低融点接合材２３によってシールド端子２０の加締められた一対の加締め部２１，２１と編組線１３の露出部とが超音波溶着により接合される。このとき、溶融した低融点接合材２３が編組線１３の編目内に浸入するため、編組線１３とシールド端子２０の加締められた一対の加締め部２１，２１とは大きな接合力で接合される。次に、このシールド電線１０の露出した芯線部１１の端末Ａには予め加締め固定された端子金具１５と編組線１３の端末Ａ側に接合されたシールド端子２０をコネクタ１６のフード部１６ａ内に装着する。
【００２１】
このように、超音波ホーン３０の超音波加振によりシールド端子２０の一対の加締め部２１，２１だけに内部発熱を発生させているので、シールド電線２０の端末Ａ部分の編組線１３の熱による損傷を最小限に抑えることができる。また、低融点接合材２３を用いて溶融した該低融点接合材２３が編組線１３の編目内に浸入するので、シールド端子２０の加締められた一対の加締め部２１，２１と編組線１３の露出部とを容易に溶着接合することができ、その信頼性をより一段と向上させることができる。さらに、従来のように、絶縁内皮１２等から編組線１３を分離する必要がないため、シールド性能を向上させることができる。
【００２２】
また、シールド端子２０の一対の加締め部２１，２１を編組線１３の露出部にセットした後で、シールド端子２０の一対の加締め部２１，２１を加締めながら該一対の加締め部２１，２１と編組線１３とを溶着接合するようにしたので、処理工程の簡素化を図ることができ、加工作業性を向上させることができる。
【００２３】
図３（ａ）は上記シールド電線１０の中間位置（接地位置）Ｂの編組線１３を露出した状態を示す斜視図、図３（ｂ）は同中間位置Ｂの編組線１３の露出部に上記シールド端子２０を接合した状態を示す斜視図である。
【００２４】
図３（ａ），（ｂ）に示すように、シールド電線１０の中間位置Ｂの絶縁外皮１４の一部を除去して編組線１３の一部を露出させ、この編組線１３の露出部にシールド端子２０の一対の加締め部２１，２１を加締めながら溶着接合させる。これにより、シールド端子２０の一対の加締め部２１，２１を介してシールド電線１０の端末Ａや中間位置Ｂ等のあらゆる接地位置にシールド端子２０を容易かつ確実に接合することができる。
【００２５】
図４は他の態様のシールド端子２０′の斜視図、図５は同シールド端子２０′の要部の部分拡大断面図、図６は同シールド端子２０′を用いたシールド電線の接合構造の要部の断面図である。
【００２６】
図４〜図６に示すように、シールド端子２０′の相対向する一対の加締め部２１′，２１′の各内面２１ａにその外周に沿う環状突出部２１ｂを一体突出形成してある。この各加締め部２１′の内面２１ａの外周に突設した環状突出部２１ｂにより、各加締め部２１′を編組線１３の露出部に加締めながら溶着接合する際の各加締め部２１′の内面２１ａに塗布された低融点接合材２３の溶融時に、該溶融した低融点接合材２３の外部への流出を確実に防止することができる。これにより、シールド端子２０の一対の加締め部２１′，２１′とシールド電線１０の編組線１３との電気的・強度的な接続信頼性を大幅に向上させることができる。
【００２７】
図７（ａ）は本発明の別の実施形態のシールド電線の接合構造を示す斜視図、図７（ｂ）は同図７（ａ）中Ｙ−Ｙ線に沿う断面図、図７（ｃ）は同接合構造に用いられる別の態様のシールド端子２０″の斜視図、図８（ａ）は同接合構造に用いられるシールド電線１０の斜視図、図８（ｂ）は同シールド電線１０とシールド端子２０″の接合前の状態を示す斜視図、図８（ｃ）は同接合後の状態を示す斜視図である。
【００２８】
図７（ｃ）及び図８（ｂ）に示すように、シールド端子２０″の一対の加締め部２１″，２１″が互い違い（齟齬状）に相対向する正面略Ｕ字状に形成してある。そして、図８（ａ）〜図８（ｃ）に示すように、シールド端子２０″をシールド電線１０に前記実施形態と同様の接合方法により接続する。即ち、超音波ホーン３０とアンビル３１によってシールド端子２０″の齟齬状で一対の加締め部２１″，２１″を加締めながら超音波加振すると、内部発熱により一対の加締め部２１″，２１″の内面２１ａに塗布された低融点接合材２３が溶融する。この溶融した低融点接合材２３によってシールド端子２０″の加締められた一対の加締め部２１″，２１″と編組線１３の露出部とが超音波溶着により接合される。このように、一対の加締め部２１″，２１″を互い違いに相対向するように折り曲げ形成したものを用いることにより、図７（ａ），（ｂ）及び図８（ｃ）に示すように、シールド端子２０″の一対の加締め部２１″，２１″の各先端間に隙間が発生することなく、該一対の加締め部２１″，２１″間内にシールド電線１０の端末（接地位置）Ａの編組線１３を完全に収めることができ、径の細い編組線１３の損傷及び断線を確実に防止することができる。その結果、シールド電線１０とシールド端子２０″の接続の信頼性（電気的な信頼性）の向上をより一段と図ることができる。
【００２９】
図９（ａ）は上記と別の実施形態のシールド電線１０の中間位置（接地位置）Ｂの編組線１３を露出した状態を示す斜視図、図９（ｂ）は同中間位置Ｂの編組線１３の露出部にシールド端子２０″を接合した状態を示す斜視図である。
【００３０】
図９（ａ），（ｂ）に示すように、シールド電線１０の中間位置（接地位置）Ｂの絶縁外皮１４の一部を除去して編組線１３の一部を露出させ、この編組線１３の露出部にシールド端子２０″の一対の加締め部２１″，２１″を加締めながら溶着接合させる。これにより、シールド端子２０″の一対の加締め部２１″，２１″を介してシールド電線１０の端末Ａや中間位置Ｂ等のあらゆる接地位置にシールド端子２０″を容易かつ確実に接合することができる。
【００３１】
尚、前記各実施形態によれば、シールド電線の端末或いは中間位置にシールド端子を超音波溶着により接合する場合について説明したが、シールド電線の端末と中間位置の両方にシールド端子をそれぞれ接合しても良い。
【００３４】
【発明の効果】
以上説明したように、請求項１の発明によれば、シールド端子の加締め部によりシールド電線の端末や中間位置等のあらゆる接地位置にシールド端子を容易かつ確実に接合することができる。特に、シールド端子の加締め部の内面にその外周に沿う環状突出部を設けたことにより、シールド端子の加締め部の内面に塗布される低融点接合材の溶融時に、該溶融した低融点接合材の外部への流出を加締め部の環状突出部により確実に防止することができる。これにより、シールド端子の加締め部とシールド電線の編組線との電気的・強度的な接続信頼性を大幅に向上させることができる。
【図面の簡単な説明】
【図１】（ａ）は本発明の実施形態のシールド電線の接合構造を示す斜視図、（ｂ）は同（ａ）中Ｘ−Ｘ線に沿う断面図、（ｃ）は同接合構造に用いられるシールド端子の斜視図である。
【図２】（ａ）は上記接合構造に用いられるシールド電線の斜視図、（ｂ）は同シールド電線とシールド端子の接合前の状態を示す斜視図、（ｃ）は同接合後の状態を示す斜視図である。
【図３】（ａ）は上記シールド電線の中間位置の編組線を露出した状態を示す斜視図、（ｂ）は同中間位置の編組線の露出部に上記シールド端子を接合した状態を示す斜視図である。
【図４】他の態様のシールド端子の斜視図である。
【図５】上記他の態様のシールド端子の要部の部分拡大断面図である。
【図６】上記他の態様のシールド端子を用いたシールド電線の接合構造の要部の断面図である。
【図７】（ａ）は本発明の別の実施形態のシールド電線の接合構造を示す斜視図、（ｂ）は同（ａ）中Ｙ−Ｙ線に沿う断面図、（ｃ）は同接合構造に用いられる別の態様のシールド端子の斜視図である。
【図８】（ａ）は上記と別の実施形態のシールド電線の接合構造に用いられるシールド電線の斜視図、（ｂ）は同シールド電線と別の態様のシールド端子の接合前の状態を示す斜視図、（ｃ）は同接合後の状態を示す斜視図である。
【図９】（ａ）は上記と別の実施形態のシールド電線の中間位置の編組線を露出した状態を示す斜視図、（ｂ）は同中間位置の編組線の露出部に上記別の態様のシールド端子を接合した状態を示す斜視図である。
【図１０】（ａ）は従来例のシールド電線の端末処理構造の編組線を分離した状態を示す斜視図、（ｂ）は同分離した編組線を熱収縮チューブで結束して端子金具を加締める前の状態を示す斜視図である。
【符号の説明】
１０ シールド電線
１１ 芯線部
１２ 絶縁内皮
１３ 編組線
１４ 絶縁外皮
２０，２０′，２０″ シールド端子
２１，２１′，２１″ 加締め部
２１ａ 内面
２１ｂ 環状突出部
２２ 雄タブ部（接続部）
２３ 低融点接合材
３０ 超音波ホーン
Ａ 端末（接地位置）
Ｂ 中間位置（接地位置）[0001]
BACKGROUND OF THE INVENTION
TECHNICAL FIELD The present invention relates to a shielded wire joining structure, a joining method, and a shield terminal used for the joining.
[0002]
[Prior art]
As this type of shielded wire terminal processing structure, there is one disclosed in Japanese Patent Laid-Open No. 7-201383 shown in FIGS. 10 (a) and 10 (b). The shielded electric wire 1 includes a core wire portion 2 made of a conductor, an insulating endothelium 3 covering the core wire portion 2, a braided wire 4 provided around the insulating endothelium 3, and provided around the braided wire 4. It is comprised from the insulation outer skin | cover 5 which covers this braided wire 4. FIG.
[0003]
Then, a part of the insulating sheath 5 at the end portion of the shielded electric wire 1 is removed to separate the insulating endothelium 3 and the braided wire 4, and the core wire portion 2 and the braided wire 4 exposed from the end of the insulating endothelium 3. Each terminal fitting 6 is swaged to be connected. Before the terminal fitting 6 is crimped and connected to the terminal side of the braided wire 4, the terminal portion of the braided wire 4 is bound through a heat shrinkable tube 7 that contracts by heat.
[0004]
[Problems to be solved by the invention]
However, in the conventional terminal treatment structure of the shielded electric wire 1, the terminal metal fitting 6 is crimped to the end of the braided wire 4 after the braided wire 4 is separated from the insulating endothelium 3. There was a risk of damage and an unshielded part occurred. Moreover, in order to bundle the terminal side of the braided wire 4, binding members, such as the heat contraction tube 7, became indispensable, and workability | operativity was bad.
[0005]
The present invention has been made to solve the problems described above, Cie Rudo can perform bonding of the shield terminals to the exposed portion of the braided wire easily and reliably without damage to the braid wire The purpose is to provide a terminal.
[0010]
[Means for Solving the Problems]
A first aspect of the present invention is a core wire portion made of a conductor, an insulating endothelium covering the core wire portion, a braided wire provided around the insulating endothelium, and an insulation provided around the braided wire and covering the braided wire. In a shield terminal that is bonded to a predetermined grounding position of a shielded electric wire composed of an outer sheath through a low melting point bonding material that is melted by ultrasonic vibration, the low melting point bonding material is applied and applied to the braided wire. A crimped portion to be joined by being tightened, and a connecting portion that is connected to the grounded counterpart connected to the crimped portion, and provided with an annular protrusion along the outer periphery of the inner surface of the crimped portion. It is characterized by.
[0011]
In this shield terminal, the joining process of each grounding position such as the end of the shielded wire or the intermediate position is easily and reliably performed by the crimped portion. In particular, when the low melting point bonding material applied to the inner surface of the caulking portion of the shield terminal is melted, the molten low melting point bonding material is reliably prevented from flowing out to the outside. Thereby, the electrical / strength connection reliability between the caulking portion of the shield terminal and the braided wire of the shield wire is greatly improved.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0017]
1A is a perspective view showing a shielded wire joining structure according to an embodiment of the present invention, FIG. 1B is a sectional view taken along line XX in FIG. 1A, and FIG. FIG. 2A is a perspective view of a shielded electric wire used for the joint structure, and FIG. 2B shows a state before the shielded electric wire and the shield terminal are joined. A perspective view and FIG.2 (c) are perspective views which show the state after the joining.
[0018]
As shown in FIGS. 1A and 1B and FIGS. 2A, 2B, and 2C, a shielded electric wire 10 used in the joint structure includes a core wire portion 11 made of a conductor and the core wire portion. 11, the insulating endothelium 12 covering the insulating endothelium 12, a braided wire 13 provided around the insulating endothelium 12 and knitted in a cross shape with a plurality of strands having a small diameter, and the braided wire provided around the braided wire 13 Insulating skin 14 covering 13. A portion of the insulation sheath 14 on the terminal (grounding position) A side of the shielded electric wire 10 is removed, and a portion of the core wire portion 11 is exposed. A pair of caulking portions 15a and 15a of the terminal fitting 15 are caulked to the terminal A of the exposed core wire portion 11. Further, the male tab portion (connecting portion) 15b of the terminal fitting 15 is mounted and protruded in the hood portion 16a of the connector 16, and is electrically connected to a mating female terminal or the like (not shown).
[0019]
Furthermore, a part of the braided wire 13 between the insulating outer skin 14 and the insulating inner skin 12 of the terminal A of the shielded electric wire 10 is also exposed. A shield terminal 20 can be joined to the exposed portion of the braided wire 13. As shown in FIG. 1 (c), the shield terminal 20 is applied with a low-melting point bonding material 23 and is crimped to the exposed portion of the braided wire 13 to be metal-bonded in a front U-shaped pair. Portions 21 and 21 and a flat L-shaped male tab portion (connecting portion) 22 integrally formed at one side end of the bottom center between the pair of caulking portions 21 and 21 and connected to a grounding counterpart (not shown); It has. The pair of caulking portions 21 and 21 are bent so as to face each other, and a low melting point bonding material 23 such as solder that is melted by ultrasonic vibration is applied to each inner surface 21a. .
[0020]
Then, the joining method for connecting the shield terminal 20 to the shielded electric wire 10 will be described. First, as shown in FIG. 2A, a part of the insulating sheath 14 at the terminal (grounding position) A of the shielded electric wire 10 is removed. Then, a part of the braided wire 13 on the terminal side is exposed. Next, as shown in FIG. 2 (b), the pair of crimped portions 21, 21 of the shield terminal 20 are inserted and set in the exposed portion of the braided wire 13, and the lower circular arc surface of the ultrasonic horn 30. It is sandwiched between 30a and the upper arc surface 31a of the anvil 31, and is subjected to ultrasonic vibration while being pressurized. When ultrasonic vibration is applied while the pair of caulking portions 21 and 21 of the shield terminal 20 are caulked by the ultrasonic horn 30 and the anvil 31, internal heat is generated by the ultrasonic energy, and the pair of caulking portions is generated by the internal heat generation. The low melting point bonding material 23 applied to 21 and 21 is melted. The melted low melting point bonding material 23 joins the pair of crimped portions 21 and 21 of the shield terminal 20 and the exposed portion of the braided wire 13 by ultrasonic welding. At this time, since the melted low melting point bonding material 23 enters the stitches of the braided wire 13, the braided wire 13 and the pair of crimped portions 21, 21 of the shield terminal 20 are joined with a large joining force. The Next, a terminal fitting 15 that has been crimped and fixed in advance to the terminal A of the exposed core wire portion 11 of the shielded electric wire 10 and a shield terminal 20 that is joined to the terminal A side of the braided wire 13 are placed in the hood portion 16a of the connector 16. Attach to.
[0021]
As described above, since the internal heat generation is generated only in the pair of crimped portions 21 and 21 of the shield terminal 20 by the ultrasonic vibration of the ultrasonic horn 30, the heat of the braided wire 13 in the terminal A portion of the shielded electric wire 20. Damage due to can be minimized. Further, since the low-melting-point bonding material 23 melted using the low-melting-point bonding material 23 enters the stitches of the braided wire 13, the pair of crimped portions 21, 21 and the braided wire 13 with which the shield terminal 20 is crimped. The exposed portion can be easily welded and joined, and the reliability can be further improved. Furthermore, since it is not necessary to separate the braided wire 13 from the insulating endothelium 12 or the like as in the prior art, the shielding performance can be improved.
[0022]
In addition, after the pair of crimped portions 21 and 21 of the shield terminal 20 are set on the exposed portion of the braided wire 13, the pair of crimped portions 21 and 21 are crimped while the pair of crimped portions 21 and 21 of the shield terminal 20 are crimped. , 21 and the braided wire 13 are welded and joined, so that the processing steps can be simplified and the workability can be improved.
[0023]
3A is a perspective view showing a state where the braided wire 13 at the intermediate position (grounding position) B of the shielded electric wire 10 is exposed, and FIG. 3B shows the exposed portion of the braided wire 13 at the intermediate position B described above. It is a perspective view which shows the state which joined the shield terminal 20. FIG.
[0024]
As shown in FIGS. 3A and 3B, a part of the insulation sheath 14 at the intermediate position B of the shielded electric wire 10 is removed to expose a part of the braided wire 13, and an exposed portion of the braided wire 13 is exposed. The pair of caulking portions 21 and 21 of the shield terminal 20 are welded and joined while being caulked. Thereby, the shield terminal 20 can be easily and reliably joined to all grounding positions such as the terminal A and the intermediate position B of the shielded electric wire 10 through the pair of crimped portions 21 and 21 of the shield terminal 20.
[0025]
4 is a perspective view of another embodiment of the shield terminal 20 ′, FIG. 5 is a partially enlarged cross-sectional view of the main part of the shield terminal 20 ′, and FIG. 6 is a schematic diagram of a shielded wire joining structure using the shield terminal 20 ′. It is sectional drawing of a part.
[0026]
As shown in FIG. 4 to FIG. 6, annular protrusions 21 b along the outer periphery of the inner surfaces 21 a of the pair of caulking parts 21 ′ and 21 ′ facing each other of the shield terminal 20 ′ are integrally formed. Each caulking portion 21 ′ when welding and joining each caulking portion 21 ′ to the exposed portion of the braided wire 13 by the annular projecting portion 21 b provided on the outer periphery of the inner surface 21 a of each caulking portion 21 ′. When the low melting point bonding material 23 applied to the inner surface 21a is melted, the molten low melting point bonding material 23 can be reliably prevented from flowing out. Thereby, the electrical / strength connection reliability between the pair of crimped portions 21 ′, 21 ′ of the shield terminal 20 and the braided wire 13 of the shielded electric wire 10 can be greatly improved.
[0027]
7 (a) is a perspective view showing a shielded wire joining structure according to another embodiment of the present invention, FIG. 7 (b) is a sectional view taken along line YY in FIG. 7 (a), and FIG. 7 (c). ) Is a perspective view of another embodiment of the shield terminal 20 ″ used in the joint structure, FIG. 8A is a perspective view of the shielded electric wire 10 used in the joint structure, and FIG. FIG. 8C is a perspective view showing a state before the shield terminal 20 ″ is joined, and FIG. 8C is a perspective view showing the state after the joint.
[0028]
As shown in FIGS. 7 (c) and 8 (b), a pair of caulking portions 21 ″ and 21 ″ of the shield terminal 20 ″ are formed in a substantially U-shape in front of each other in a staggered manner (a bowl shape). 8A to 8C, the shield terminal 20 ″ is connected to the shielded electric wire 10 by the same joining method as in the above embodiment. That is, when the ultrasonic horn 30 and the anvil 31 ultrasonically vibrate a pair of caulking portions 21 ", 21" in the shape of a shield terminal 20 ", a pair of caulking portions 21", 21 are generated by internal heat generation. The low melting point bonding material 23 applied to the inner surface 21 a of the metal melts the melted low melting point bonding material 23 and the pair of crimped portions 21 ″, 21 ″ of the shield terminal 20 ″ and the braided wire 13. The exposed part is joined by ultrasonic welding. As shown in FIGS. 7 (a), 7 (b), and 8 (c), a pair of caulking portions 21 ″, 21 ″ are bent and formed so as to face each other alternately. The terminal of the shielded electric wire 10 (grounding position) is not formed between the pair of crimping portions 21 ″, 21 ″ without generating a gap between the tips of the pair of crimping portions 21 ″, 21 ″ of the shield terminal 20 ″. ) The braided wire 13 of A can be completely accommodated, and damage and disconnection of the braided wire 13 having a small diameter can be surely prevented. As a result, the reliability of the connection between the shielded electric wire 10 and the shield terminal 20 ″ ( The electrical reliability can be further improved.
[0029]
9A is a perspective view showing a state in which the braided wire 13 at the intermediate position (grounding position) B of the shielded electric wire 10 according to another embodiment is exposed, and FIG. 9B is a braided wire at the intermediate position B. 13 is a perspective view showing a state in which a shield terminal 20 ″ is joined to 13 exposed portions. FIG.
[0030]
As shown in FIGS. 9A and 9B, a part of the insulation sheath 14 at the intermediate position (grounding position) B of the shielded electric wire 10 is removed to expose a part of the braided wire 13. A pair of crimped portions 21 ", 21" of the shield terminal 20 "are welded and joined to the exposed portion of the shield terminal 20". Thereby, the shielded electric wire is connected via the pair of crimped portions 21 ", 21" of the shield terminal 20 ". The shield terminal 20 ″ can be easily and reliably joined to any grounding position such as the terminal A or the middle position B.
[0031]
In addition, according to each said embodiment, although the case where a shield terminal was joined by ultrasonic welding to the terminal or intermediate position of a shielded electric wire was explained, the shield terminal was joined to both the terminal and intermediate position of a shielded electric wire, respectively. Also good.
[0034]
【The invention's effect】
As described above , according to the first aspect of the present invention, the shield terminal can be easily and reliably joined to any grounding position such as the end of the shielded electric wire or the intermediate position by the caulking portion of the shield terminal. In particular, by providing an annular protrusion on the inner surface of the crimping portion of the shield terminal along the outer periphery thereof, when the low melting point bonding material applied to the inner surface of the crimping portion of the shield terminal is melted, the molten low melting point bonding Outflow of the material to the outside can be reliably prevented by the annular protrusion of the caulking portion. Thereby, the electrical / strength connection reliability between the caulking portion of the shield terminal and the braided wire of the shield electric wire can be greatly improved.
[Brief description of the drawings]
1A is a perspective view showing a shielded wire joining structure according to an embodiment of the present invention, FIG. 1B is a sectional view taken along line XX in FIG. 1A, and FIG. It is a perspective view of the shield terminal used.
2A is a perspective view of a shielded electric wire used in the joining structure, FIG. 2B is a perspective view showing a state before the shielded electric wire and the shield terminal are joined, and FIG. 2C is a state after the joining. It is a perspective view shown.
3A is a perspective view showing a state where a braided wire at an intermediate position of the shielded electric wire is exposed, and FIG. 3B is a perspective view showing a state where the shield terminal is joined to an exposed portion of the braided wire at the intermediate position. FIG.
FIG. 4 is a perspective view of another embodiment of a shield terminal.
FIG. 5 is a partially enlarged cross-sectional view of a main part of the shield terminal according to another aspect.
FIG. 6 is a cross-sectional view of a main part of a shielded wire joining structure using the shield terminal according to another embodiment.
7A is a perspective view showing a shielded wire joining structure according to another embodiment of the present invention, FIG. 7B is a sectional view taken along line YY in FIG. 7A, and FIG. It is a perspective view of the shield terminal of another aspect used for a structure.
FIG. 8A is a perspective view of a shielded wire used in a shielded wire joining structure of another embodiment different from the above, and FIG. 8B shows a state before the shielded wire and a shield terminal of another aspect are joined. A perspective view and (c) are perspective views showing the state after the joining.
9A is a perspective view showing a state where a braided wire at an intermediate position of a shielded electric wire according to another embodiment is exposed, and FIG. 9B shows another aspect of the exposed portion of the braided wire at the intermediate position. It is a perspective view which shows the state which joined the shield terminal of.
10A is a perspective view showing a state in which the braided wire of the shielded wire end treatment structure of the conventional example is separated, and FIG. 10B is a view showing a state in which the separated braided wire is bound with a heat shrinkable tube to add a terminal fitting. It is a perspective view which shows the state before fastening.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Shield electric wire 11 Core wire part 12 Insulating inner skin 13 Braided wire 14 Insulating outer skin 20, 20 ', 20 "Shield terminal 21,21', 21" Clamping part 21a Inner surface 21b Annular protrusion part 22 Male tab part (connection part)
23 Low melting point bonding material 30 Ultrasonic horn A Terminal (grounding position)
B Intermediate position (grounding position)

Claims (1)

導体からなる芯線部と、この芯線部を覆う絶縁内皮と、この絶縁内皮の周囲に設けられた編組線と、この編組線の周囲に設けられて該編組線を覆う絶縁外皮とからなるシールド電線の所定の接地位置に、超音波加振により溶融される低融点接合材を介して接合されるシールド端子において、
前記低融点接合材が塗布されると共に前記編組線に加締められて接合される加締め部と、この加締め部に連設されて接地相手に接続される接続部とを備え、前記加締め部の内面にその外周に沿う環状突出部を設けたことを特徴とするシールド端子。A shielded electric wire comprising a conductor core wire portion, an insulating endothelium covering the core wire portion, a braided wire provided around the insulating endothelium, and an insulating sheath provided around the braided wire and covering the braided wire In a shield terminal that is bonded to a predetermined grounding position via a low melting point bonding material that is melted by ultrasonic vibration,
Wherein comprising a crimping portion to be caulked is in bonded to the braided wire with a low melting point bonding material is applied, and a connecting portion connected to the ground counterpart is provided continuously to the crimping portion, the crimp A shield terminal characterized in that an annular protrusion along the outer periphery is provided on the inner surface of the part .
JP22624298A 1998-08-10 1998-08-10 Shield terminal Expired - Fee Related JP3901855B2 (en)

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JP22624298A JP3901855B2 (en) 1998-08-10 1998-08-10 Shield terminal
DE1999137100 DE19937100C2 (en) 1998-08-10 1999-08-06 Connection method for a shielded cable
GB9918750A GB2340674B (en) 1998-08-10 1999-08-09 Shielded cable joining structure, joining method, and shield terminal for use in same

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