JP3585465B2 - Elastic cord - Google Patents

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Publication number
JP3585465B2
JP3585465B2 JP2002009957A JP2002009957A JP3585465B2 JP 3585465 B2 JP3585465 B2 JP 3585465B2 JP 2002009957 A JP2002009957 A JP 2002009957A JP 2002009957 A JP2002009957 A JP 2002009957A JP 3585465 B2 JP3585465 B2 JP 3585465B2
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Prior art keywords
elastic
insulated wires
covering member
fibers
cord
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JP2002009957A
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JP2003217359A (en
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清崇 酒井
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エス・ディ・ケイ株式会社
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【0001】
【発明の属する技術分野】
本発明は、ヘッドホン、イヤホン、マイクロホン、イヤホン・マイクロホン等とスピーカ、オーディオ機器、映像機器等とを接続するための伸縮性コードに関するものである。
【0002】
【従来の技術】
従来、ヘッドホン等とオーディオ機器等とを接続するためのコードとして、例えば、3組(3極)の絶縁電線が、ビニール等の外部被覆部材で被覆されたものが知られている。外部被覆部材内の各絶縁電線は、ウレタン被覆等で絶縁被覆された複数本の銅線等で構成されている。
【0003】
このようなコードは、例えば、一端にヘッドホン等が接続され、他端にプラグが接続される。そして、オーディオ機器等に設けられたレセプタクルにプラグを挿入すれば、ヘッドホン等とオーディオ機器とが、コードによって電気的に接続される。
【0004】
【発明が解決しようとする課題】
しかしながら、従来のコードでは、次のような課題があった。
例えば、ヘッドホン等に接続されるコードでは、伸縮しないので、屈曲や引張り、あるいは引掛け等によって該コードに折曲げ応力や張力が働くと、コードが断線したり、あるいはコードとプラグや機器等との接続箇所が断線しやすくなるという問題があった。
【0005】
このような問題を解決するために、絶縁電線を被覆しているビニール等の外部被覆部材の肉厚を厚くして、屈曲強度や引張り強度を大きくすることも行われている。しかし、引掛け等によってコードとプラグや機器等との接続箇所の断線を防止することができないばかりか、外部被覆部材の肉厚を厚くすることによってコード全体の重量が増加して重くなる。一方、軽量化のために、外部被覆部材の肉厚を薄くしてコードを細くすると、屈曲強度や引張り強度が小さくなって断線しやすくなるばかりか、ヘッドホン等を使用しない時にコードを束ねた場合、このコードが絡まりやすいので、使い勝手が悪い等といった課題があった。
【0006】
そのため、軽量で、絡まりにくく、しかも、断線しにくく、使い勝手のよい伸縮性コードが望まれていた。
【0007】
【課題を解決するための手段】
前記課題を解決するために、本発明のうちの第1の発明は、ヘッドホン等に使用される伸縮性コードにおいて、単線又は撚線からなる複数本の絶縁電線と、前記複数本の絶縁電線の周りに該絶縁電線に沿って配設され、伸び率数百%の伸縮性を有し、張力をかけると、弾性変形により長さが伸びて外径が小さくなり、該張力を解除すると、弾性復元力により元の長さに縮んで外径が大きくなる複数本の弾性繊維と、前記複数本の絶縁電線の周りに配設された前記複数本の弾性繊維にのみ所定の張力をかけた状態で、該複数本の弾性繊維の外周に沿って、絶縁性繊維が所定の編組密度で編まれ、該張力が解除されると、該弾性繊維の弾性復元力により該弾性繊維の外径が大きくなって該絶縁性繊維の編組密度が大きくなる外部被覆部材とを備えている。
【0014】
これにより、伸縮性コードに張力が加わらない時には、内部の複数本の弾性繊維が弾性復元力により縮んで外径が大きくなっており、この縮みに追従して内部の複数本の絶縁電線が屈曲変形して縮んでいる。引張りや引掛け等によって伸縮性コードに張力がかかると、外部被覆部材の編組密度が小さくなって(即ち、粗くなって)伸びる。これに追従して内部の弾性繊維及び絶縁電線の長さが伸びる。張力が解除されると、弾性繊維の弾性復元力によって伸縮性コードが元の長さに縮む。
【0015】
の発明は、第の発明の伸縮性コードにおいて、前記複数本の絶縁電線は、撚合されている。これにより、撚合された複数本の絶縁電線は、この周りの複数本の弾性繊維によって内部に保持され、外部被覆部材からの飛び出しが阻止される。
【0016】
の発明は、第1又は第2の発明の伸縮性コードにおいて、前記弾性繊維は、ポリウレタン繊維で形成している。
【0017】
の発明は、伸縮性コードにおいて、撚合された複数本の絶縁電線と、前記複数本の絶縁電線の外周を、直接又は保護被覆部材を介して覆う弾性チューブと、前記複数本の絶縁電線及び前記弾性チューブに所定の張力をかけた状態で、該弾性チューブの外周に沿って、繊維が所定の編組密度で編まれた外部被覆部材とを有し、前記弾性チューブ及び前記外部被覆部材が、加熱処理によりカール状に塑性変形されている。
【0018】
これにより、弾性チューブ及び外部被覆部材がカール状に塑性変形されているので、伸縮性コードに張力がかからない時には、コード全体の長さが縮んでいる。引張りや引掛け等によって伸縮性コードに張力がかかると、弾性チューブが弾性変形して伸びると共に、繊維で編まれた外部被覆部材の編組密度が小さく(即ち、粗く)なって該弾性チューブに追従して伸びていき、コード全体が伸びる。張力が解除されると、弾性チューブの復元力によって該弾性チューブがカール状に縮むと共に、これに追従して外部被覆部材の編組密度が大きくなり、コード全体の長さが元の長さに縮む。
【0019】
の発明は、伸縮性コードにおいて、1本又は複数本の補強繊維と共に撚合された複数本の絶縁電線と、前記1本又は複数本の補強繊維と前記複数本の絶縁電線との外周を、直接又は保護被覆部材を介して覆う弾性チューブと、前記1本又は複数本の補強繊維、前記複数本の絶縁電線、及び前記弾性チューブに所定の張力をかけた状態で、該弾性チューブの外周に沿って、繊維が所定の編組密度で編まれた外部被覆部材とを有し、前記弾性チューブ及び前記外部被覆部材が、加熱処理によりカール状に塑性変形されている。
これにより、1本又は複数本の補強繊維が複数本の絶縁電線と共に撚合されているので、該補強繊維によって引張力等の機械的強度が向上する。
【0020】
【発明の実施の形態】
(第1の参考例
(a)〜(c)は本発明の第1の参考例を示す単芯の伸縮性コードの構成図であり、同図(a)は斜視図、同図(b)は張力をかけた時の縦断面図、及び同図(c)は張力をかけない時の縦断面図である。
【0021】
この単芯の伸縮性コード10は、例えば、外径が1mm程度であり、中心に外径が0.8mm程度の1本又は複数本の弾性繊維11が設けられている。弾性繊維11は、伸び率数百%の伸縮性を有し、張力をかけると、図1(b)に示すように、弾性変形により長さが伸びて外径が小さくなり、張力を解除すると、図1(c)に示すように、弾性復元力により元の長さに縮んで外径が大きくなる繊維であり、例えば、ポリウレタン繊維等で形成されている。
【0022】
弾性繊維11の外周は、編組12で被覆されている。編組12は、単線又は撚線の銅線等の金属線12aで編まれたものである。銅線等の金属線12aは、例えば、外径が0.06mm程度であり、裸線、あるいはポリウレタン等の合成樹脂で被覆された被覆線で構成されている。編組12は、弾性繊維11に所定の張力をかけた状態で、該弾性繊維11の外周に沿って金属線12aが所定の編組密度で編まれ、張力が解除されると、弾性繊維11の弾性復元力で該弾性繊維11が縮むことによって該金属線12aの編組密度が大きくなり、該弾性繊維11の外周面を圧接した状態で被覆している。
【0023】
このような単芯の伸縮性コード10は、例えば、次のようにして製造される。
予め、弾性繊維11をドラムに巻取っておくと共に、金属線12aをボビンに巻取っておく。編組打ち機に、金属線12aが巻かれたボビンを複数個セットし、ドラムから繰出された弾性繊維11を中央にセットし、図1(b)に示すように、この弾性繊維11に所定の張力をかけた状態で、該弾性繊維11の周囲に金属線12aを複数打ちして編組12を形成する。編組12を形成した後、弾性繊維11への張力を小さくすると、図1(c)に示すように、弾性復元力によって弾性繊維11が縮んで外径が大きくなり、この周りを覆っている編組12の長さを縮めつつ外径方向に押拡げようとするので、該編組12の編組密度が大きくなり(即ち、編まれた金属線間の距離が小さくなり)、この編組12が圧接した状態で弾性繊維11の外周面に保持される。弾性繊維11の外周を編組12で被覆した後、ドラムに巻取れば、伸縮性コード10の製造が終了する。
【0024】
このようにして製造された単芯の伸縮性コード10を使用する場合、用途に応じて所定の長さに切断し、ヘッドホンやプラグ等に半田付け等で接続すれば、この伸縮性コード10によってヘッドホン等の電気信号の伝送が行える。又、第2の実施形態で説明するように、この伸縮性コード10の外周を絶縁性被覆部材で被覆し、種々の用途に使用するようにしてもよい。
【0025】
この第1の参考例では、次の(1)、(2)のような作用、効果がある。
(1)伸び率数百%の伸縮性を有する弾性繊維11の外周を、金属線12aからなる編組12で被覆しているので、張力をかけない時には、編組密度の大きな編組12が弾性繊維11の外周面を圧接し、張力をかけた時には、弾性繊維11が伸びるが、これに圧接している編組12も、編組密度が小さくなって伸びる。この際、編組12によって弾性繊維11が中心軸方向へ締付けられ、該弾性繊維11の伸びが数倍に抑えられるので、該弾性繊維11の切断を防止できる。しかも、曲げ応力や張力が加わっても、これに対応して伸縮性コード10が弾性変形するので、切断しにくく、屈曲強度及び引張り強度等の機械的強度が大きい。
【0026】
(2)引張りや引掛け等によって伸縮性コード10に張力が加わっても、これに対応して伸縮性コード10が伸縮するので、プラグや機器等との接続箇所が断線しなくなる。しかも、弾力性があるので、絡まりにくく、使い勝手がよい。
【0027】
(第2の参考例
(a)〜(c)は本発明の第2の参考例を示す単芯の伸縮性コードの構成図であり、同図(a)は斜視図、同図(b)は張力をかけた時の縦断面図、及び同図(c)は張力をかけない時の縦断面図であり、第1の参考例を示す図中の要素と共通の要素には共通の符号が付されている。
【0028】
この単芯の伸縮性コード20は、図の伸縮性コード10の外周が被覆部材21で絶縁被覆された外径が1.2mm程度の絶縁電線である。
即ち、弾性繊維11の外周に編まれた金属線12aからなる編組12を有する図の伸縮性コード10の外周が、被覆部材21で被覆されている。被覆部材21は、太さが数十デニール(但し、デニールは9000mが1gの糸を1とした数値)の絶縁性繊維(例えば、地球環境に優しい非塩化ビニール系のポリエステル、ポリプロピレン、ナイロン等の合成繊維等)21aで編まれた編組で形成されている。被覆部材21は、図(b)に示すように、弾性繊維11及び編組12に所定の張力をかけた状態で、該編組12の外周に沿って絶縁性繊維21aが所定の編組密度で編まれ、図(c)に示すように、張力が解除されると、弾性繊維11の弾性復元力で該弾性繊維11が縮むことによって該絶縁性繊維21aの編組密度が大きくなり、該編組12の外周面を圧接した状態で被覆している。
【0029】
このような単芯の伸縮性コード20は、例えば、次のようにして製造される。
予め、弾性繊維11及び編組12からなる図の伸縮性コード10を、ドラムに巻取っておく。編組打ち機に、絶縁性繊維21aが巻かれたボビンを複数個セットし、ドラムから繰出された図1の伸縮性コード10を中央にセットし、図(b)に示すように、この伸縮性コード10に所定の張力をかけた状態で、該伸縮性コード10の周囲に絶縁性繊維21aを複数打ちして編組を施して被覆部材21を形成する。被覆部材21を形成した後、伸縮性コード10への張力を小さくすると、図(c)に示すように、弾性繊維11の弾性復元力により伸縮性コード10の長さが縮んで外径が大きくなり、その縮みによって編組12の外周面に圧接している被覆部材21の編組密度が大きくなる。伸縮性コード10の外周を被覆部材21で被覆した後、ドラムに巻取れば、伸縮性コード20の製造が終了する。
【0030】
このようにして製造された伸縮性コード20を使用する場合、用途に応じて所定の長さに切断する。切断された伸縮性コード20の両端部の被覆部材21を剥離し、金属線12aからなる編組12を露出させる。そして、この露出させた編組12を、半田付け等によってヘッドホンやプラグ等に接続すれば、この伸縮性コード20によってヘッドホン等の電気信号の伝送が行える。
【0031】
この第2の参考例では、第1の参考例の作用、効果の他に、さらに次の(a)のような作用、効果がある。
(a)被覆部材21を、絶縁性繊維21aによる編組で形成しているので、コード全体を軽量化できると共に、機械的強度を向上できる。このため、コード全体の軽量化により、首等にかけた時の身体への負担等を軽減できる。
【0032】
(第3の参考例
は、本発明の第3の参考例を示す3芯の伸縮性コードの斜視図であり、第2の参考例を示す図中の要素と共通の要素には共通の符号が付されている。
【0033】
この3芯の伸縮性コード30は、図の単芯の伸縮性コード20でそれぞれ構成された3本の絶縁電線20−1〜20−3を有し、この3本の絶縁電線20−1〜20−3の外周が外部被覆部材31で被覆されている。外部被覆部材31は、絶縁性繊維(例えば、地球環境に優しい非塩化ビニール系のポリエステル、ポリプロピレン、ナイロン等の合成繊維等)31aで編まれた編組で形成されている。外部被覆部材31は、3本の絶縁電線20−1〜20−3に所定の張力をかけた状態で、この絶縁電線20−1〜20−3の外周に沿って絶縁性繊維31aが所定の編組密度で編まれ、張力が解除されると、絶縁電線20−1〜20−3の弾性復元力で該絶縁電線20−1〜20−3が縮むことによって該絶縁性繊維31aの編組密度が大きくなり、該絶縁電線20−1〜20−3の外周面を圧接した状態で被覆している。
【0034】
このような3芯の伸縮性コード30は、例えば、次のようにして製造される。
予め、3本の絶縁電線20−1〜20−3をドラムに巻取っておく。編組打ち機に、絶縁性繊維31aが巻かれたボビンを複数個セットし、ドラムから繰出された絶縁電線20−1〜20−3を中央にセットし、この絶縁電線20−1〜20−3に所定の張力をかけて長さを伸ばした状態で、該絶縁電線20−1〜20−3の周囲に絶縁性繊維31aを複数打ちして編組を施して外部被覆部材31を形成する。その後、張力を小さくすると、絶縁電線20−1〜20−3の弾性復元力により長さが縮んで外径が大きくなるので、これをドラムに巻取れば、伸縮性コード30の製造が終了する。
このようにして製造された3芯の伸縮性コード30は、種々の用途に使用できる。
【0035】
この第3の参考例では、第1及び第2の参考例の作用、効果の他に、さらに次の(b)、(c)のような作用、効果がある。
(b)図2の単芯の伸縮性コード20に対し、3芯用に適した用途に使用できる。
【0036】
(c)絶縁電線20−1〜20−3の被覆部材21の色彩や編み方等を変えることにより、自由度の高いデザインを施すことが可能となり、これによって装飾的価値を向上できる。
【0037】
(第の実施形態)
(a)、(b)は本発明の第の実施形態を示す3芯の伸縮性コードの構成図であり、同図(a)は斜視図、及び同図(b)は縦断面図である。
この3芯の伸縮性コード40は、3本の絶縁電線41−1〜41−3を有している。各絶縁電線41−1〜41−3は、単線又は撚線の銅線等の金属線41aを有し、この金属線41aがポリウレタン等の合成樹脂等で形成された被覆部材41bによって被覆されている。絶縁電線41−1〜41−3の周りには、この絶縁電線41−1〜41−3に沿って、複数本の弾性繊維42が配設されている。各弾性繊維42は、図の弾性繊維11とほぼ同様に、例えば、外径が0.8mm程度のポリウレタン繊維等で形成され、伸び率数百%の伸縮性を有し、張力をかけると、弾性変形により長さが伸びて外径が小さくなり、張力を解除すると、弾性復元力により元の長さに縮んで外径が大きくなる繊維である。
【0038】
複数本の弾性繊維42の外周は、外部被覆部材43で被覆されている。外部被覆部材43は、図の外部被覆部材31とほぼ同様に、絶縁性繊維(例えば、地球環境に優しい非塩化ビニール系のポリエステル、ポリプロピレン、ナイロン等の合成繊維等)43aで編まれた編組で形成されている。外部被覆部材43は、複数本の弾性繊維42にのみ所定の張力をかけた状態で、この複数本の弾性繊維42の外周に沿って、絶縁性繊維43aが所定の編組密度で編まれ、張力が解除されると、弾性繊維42の弾性復元力で該弾性繊維42が縮むことによって該絶縁性繊維43aの編組密度が大きくなり、該弾性繊維42の外周面を圧接した状態で被覆している。
【0039】
複数本の弾性繊維42内の3本の絶縁電線41−14〜41−3は、外部被覆部材43からの飛び出しを防止するために、撚合せた構造にすることが望ましい。
【0040】
このような3芯の伸縮性コード40は、例えば、次のようにして製造される。
3本の絶縁電線41−1〜41−3をバンチャーで撚合せてドラムに巻取る。ドラムに巻取られた3本の絶縁電線41−1〜41−3を繰出し、この外周を複数本の弾性繊維42で覆うように、該弾性繊維42を配置してドラムに巻取る。一方、編組用の絶縁性繊維43aをボビンに巻取っておく。編組打ち機に、絶縁性繊維43aが巻かれたボビンを複数個セットし、ドラムから繰出された、絶縁電線41−1〜41−3を覆う複数本の弾性繊維42を中央にセットし、この複数本の弾性繊維42にのみ所定の張力をかけて引伸ばした状態で、この複数本の弾性繊維42の周囲に絶縁性繊維43aを複数打ちして編組を施して外部被覆部材43を形成する。
【0041】
複数本の弾性繊維42に対する張力を解除すると、該弾性繊維42の弾性復元力により該弾性繊維42の長さが縮んで外径が大きくなり、その縮みによって外部被覆部材43の編組密度が大きくなる。弾性繊維42の外径が大きくなると、この周りの外部被覆部材43によって該弾性繊維42が圧接された状態になる。これをドラムに巻取れば、伸縮性コード40の製造が終了する。
【0042】
この第の実施形態では、次の(i)〜(iii)のような作用、効果がある。
(i)張力がかからない状態では、複数本の弾性繊維42が縮み、これに伴って内部の絶縁電線41−1〜41−3も屈曲して縮んでいる。張力がかかると、複数本の弾性繊維42が伸びると共に、内部の絶縁電線41−1〜41−3も伸びる。これにより、図の伸縮性コード30に比べて伸縮率が若干劣るが、この伸縮性コード30とほぼ同様の作用、効果が得られる。
【0043】
(ii)各絶縁電線41−1〜41−3の被覆部材41bを、例えば、合成樹脂等で形成した場合、図の絶縁電線20−1〜20−3に比べて製造が容易になり、これによって伸縮性コード40の製造が簡単になる。
【0044】
(iii)3本の絶縁電線41−1〜41−3を撚合せた構造にすると、屈曲や 引張りの繰返しにより、該絶縁電線41−1〜41−3が編組からなる外部被覆部材43から飛び出すことを、防止できる。しかも、撚合せた絶縁電線41−1〜41−3の周りを複数本の弾性繊維42で囲っているので、伸縮性コード40の断面形状がほぼ円形になる。
【0045】
(第の実施形態)
(a)、(b)は本発明の第の実施形態を示すカール状の伸縮性コードの構成図であり、同図(a)は斜視図、及び同図(b)はコード部分の縦断面図である。
【0046】
このカール状の伸縮性コード50は、単芯又は複数芯(例えば、3芯)のカール状コードであり、1本又は複数本の補強繊維51と共に、3本の絶縁電線52−1〜52−3が撚合されている。各絶縁電線52−1〜52−3は、図の絶縁電線41−1〜41−3とほぼ同様に、単線又は撚線の銅線等の金属線52aを有し、この金属線52aがポリウレタン等の合成樹脂等で形成された被覆部材52bによって被覆されている。撚合された補強繊維51及び絶縁電線52−1〜52−3の外周は、紙等の保護被覆部材53を介して、弾性チューブ54で被覆されている。弾性チューブ54は、弾力性のある合成ゴム等で形成されている。
【0047】
弾性チューブ54の外周は、外部被覆部材55で被覆されている。外部被覆部材55は、繊維(例えば、地球環境に優しい非塩化ビニール系のポリエステル、ポリプロピレン、ナイロン等の合成繊維等)55aで編まれた編組で形成されている。外部被覆部材55は、補強繊維51、絶縁電線52−1〜52−3、保護被覆部材53、及び弾性チューブ54に所定の張力をかけた状態で、該弾性チューブ54の外周に沿って、繊維55aが所定の編組密度で編まれた編組で形成されている。そして、弾性チューブ54及び外部被覆部材55が、加熱処理によりカール状に塑性変形されている。
【0048】
このような3芯の伸縮性コード50は、例えば、次のようにして製造される。
補強芯線51及び絶縁電線52−1〜52−3をバンチャーで撚合せ、この外側に保護被覆部材53を巻付けて、ドラムに巻取る。ドラムに巻取られた補強繊維51、絶縁電線52−1〜52−3及び保護被覆部材53を繰出し、押出し機によって弾性チューブ54で被覆してドラムに巻取る。一方、編組用の繊維55aをボビンに巻取っておく。編組打ち機に、繊維55aが巻取られたボビンを複数個セットし、ドラムから繰出された弾性チューブ54を中央にセットし、この弾性チューブ54の全体に張力をかけた状態で、外周に繊維55aを複数打ちして編組を施して外部被覆部材55を形成し、ドラムに巻取る。これをドラムから繰出し、外部被覆部材55及び弾性チューブ54を加熱しつつカール状に塑性変形すれば、伸縮性コード50の製造が終了する。
【0049】
このようにして製造されたカール状の伸縮性コード50では、張力が加わると、カール部分のピッチが広がって長さが伸び、張力を解除すると、弾性復元力によってカール部分のピッチが狭くなって縮まる。
【0050】
この第の実施形態では、次の(イ)、(ロ)のような作用、効果がある。
(イ)張力をかけることによってカール部分が伸縮する。この際、弾性チューブ54が、これに圧接する編組からなる外部被覆部材55で被覆されているので、軽量で、屈曲や引張りに対する機械的強度が大きい。
【0051】
(ロ)補強芯線51はコードの機械的強度を向上させるものであり、又、保護被覆部材53は、撚合せた絶縁電線52−1〜52−3を弾性チューブ54で被覆する際の製造を容易にする等のために設けられる。しかし、外側を編組からなる外部被覆部材55で機械的強度を向上させているので、補強繊維51を省略することも可能である。又、製造方法を工夫すること等により、保護被覆部材53を省略することも可能である。このように補強繊維51や保護被覆部材53を省略すれば、製造材料が少なくなって低コスト化が可能となる。
【0052】
(変形例)
本発明は、上記の参考例や実施形態に限定されず、種々の変形が可能である。この変形例としては、例えば、次の(I)、(II)のようなものがある。
(I)図、図及び図の伸縮性コード30,40,50は、3芯のコードであるが、これらを2芯や4芯等のコードに変更することも可能である。
(II)参考例や実施形態の伸縮性コード10,20,30,40,50の形状、寸法、材料等は、種々のものに変更することが可能である。
【0053】
【発明の効果】
以上詳細に説明したように、第1の発明によれば、弾性繊維が設けられ、曲げ応力や張力が加わってもコード全体が弾性変形するので、屈曲強度や引張り強度等の機械的強度が大きく、断線しにくく、弾力性によって絡まりにくく、軽量で使い勝手がよい伸縮性コードを提供できる。
【0055】
の発明によれば、複数本の絶縁電線が撚合されているので、屈曲等によって絶縁電線が、編組からなる外部被覆部材から飛び出すことを、防止できる。
【0056】
の発明によれば、弾性繊維をポリウレタン繊維で形成しているので、伸縮率を大きくできる。
【0057】
及び第の発明によれば、伸縮可能なカール状部分の弾性チューブの外周は、編組からなる外部被覆部材が圧接した状態で被覆されているので、この外部被覆部材によって機械的強度が向上する。従って、軽量で、機械的強度が大きく、絡まりにくく、使い勝手のよい伸縮性コードを提供できる。
【図面の簡単な説明】
【図1】本発明の第1の実施形態を示す芯の伸縮性コードの構成図である。
【図2】本発明の第2の実施形態を示すカール状の伸縮性コードの構成図である。
【図3】本発明の第参考例を示す芯の伸縮性コードの構成図である。
【図4】本発明の第参考例を示す芯の伸縮性コードの構成図である。
【図5】本発明の第参考例を示す3芯の伸縮性コードの斜視図である。
【符号の説明】
10,20,30,40,50 伸縮性コード
11,42 弾性繊維
12 編組
12a,41a,52a 金属線
21,41b,52b 被覆部材
20−1〜20−3,41−1〜41−3,52−1〜52−3 絶縁電線
21a,31a,43a 絶縁性繊維
31,43,55 外部被覆部材
51 補強繊維
53 保護被覆部材
54 弾性チューブ
55a 繊維
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an elastic cord for connecting a headphone, an earphone, a microphone, an earphone / microphone, and the like to a speaker, an audio device, a video device, and the like.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, as a cord for connecting a headphone or the like to an audio device or the like, for example, a cord in which three sets (three poles) of insulated wires are covered with an outer covering member such as vinyl is known. Each insulated wire in the outer covering member is constituted by a plurality of copper wires or the like which are insulated and coated with urethane coating or the like.
[0003]
In such a cord, for example, a headphone or the like is connected to one end, and a plug is connected to the other end. Then, when a plug is inserted into a receptacle provided in the audio equipment or the like, the headphones and the audio equipment are electrically connected by a cord.
[0004]
[Problems to be solved by the invention]
However, the conventional code has the following problems.
For example, since a cord connected to headphones or the like does not expand or contract, if a bending stress or tension acts on the cord due to bending, pulling, hooking, or the like, the cord may be disconnected, or a cord and a plug or a device may be disconnected. There is a problem that the connection point of the connection is easily broken.
[0005]
In order to solve such a problem, the thickness of the outer covering member such as vinyl covering the insulated wire is increased to increase the bending strength and the tensile strength. However, it is not possible to prevent disconnection of the connection portion between the cord and the plug or the device due to hooking or the like, and also, by increasing the thickness of the outer covering member, the weight of the entire cord increases and becomes heavy. On the other hand, if the cord is made thinner by reducing the thickness of the outer covering member to reduce the weight, not only the bending strength and the tensile strength are reduced but also the wire is easily broken, and the cord is bundled when not using headphones or the like. However, since this code is easily entangled, there is a problem that the usability is poor.
[0006]
Therefore, there has been a demand for an easy-to-use elastic cord that is lightweight, hard to be entangled, and hard to break.
[0007]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, a first invention of the present invention is a stretchable cord used for headphones or the like , wherein a plurality of insulated wires made of a single wire or a stranded wire, It is disposed along the insulated wire around and has an elasticity of several hundred percent elongation. When tension is applied, the length increases due to elastic deformation and the outer diameter decreases, and when the tension is released, the elasticity decreases. A state in which a predetermined tension is applied only to the plurality of elastic fibers whose outer diameter is increased by shrinking to the original length due to the restoring force and the plurality of elastic fibers disposed around the plurality of insulated wires. Then, along the outer periphery of the plurality of elastic fibers, the insulating fibers are woven at a predetermined braid density, and when the tension is released, the outer diameter of the elastic fibers increases due to the elastic restoring force of the elastic fibers. And an outer covering member that increases the braid density of the insulating fiber. There.
[0014]
As a result, when tension is not applied to the elastic cord, the inner elastic fibers are contracted by the elastic restoring force to increase the outer diameter, and the inner insulated wires are bent following the contraction. Deformed and shrunk. When tension is applied to the elastic cord by pulling, hooking, or the like, the braid density of the outer covering member decreases (that is, becomes coarse) and the outer covering member elongates. Following this, the lengths of the elastic fibers and the insulated wires inside extend. When the tension is released, the elastic cord contracts to its original length due to the elastic restoring force of the elastic fiber.
[0015]
The second invention is the elastic cord of the first invention, the plurality of insulated wires are twisted together. Thereby, the twisted insulated wires are held inside by the plurality of elastic fibers around them, and are prevented from jumping out of the outer covering member.
[0016]
A third aspect of the present invention is the elastic cord according to the first or second aspect , wherein the elastic fibers are formed of polyurethane fibers.
[0017]
According to a fourth aspect of the present invention, in the elastic cord, a plurality of twisted insulated wires, an elastic tube that covers an outer periphery of the plurality of insulated wires directly or via a protective covering member, and the plurality of insulated wires. An outer covering member in which fibers are woven at a predetermined braid density along an outer periphery of the elastic tube in a state where a predetermined tension is applied to the electric wire and the elastic tube, wherein the elastic tube and the outer covering member Are plastically deformed into a curl by the heat treatment.
[0018]
Thereby, since the elastic tube and the outer covering member are plastically deformed in a curl shape, when the tension is not applied to the elastic cord, the entire length of the cord is reduced. When tension is applied to the elastic cord by pulling or hooking, the elastic tube is elastically deformed and expanded, and the braid density of the outer covering member woven with fibers is reduced (that is, coarse) and follows the elastic tube. And the whole cord grows. When the tension is released, the elastic tube shrinks in a curl shape due to the restoring force of the elastic tube, and the braid density of the outer covering member increases accordingly, and the entire length of the cord shrinks to the original length. .
[0019]
According to a fifth aspect of the present invention, in the elastic cord, a plurality of insulated wires twisted together with one or more reinforcing fibers, and an outer periphery of the one or more reinforcing fibers and the plurality of insulated wires are provided. An elastic tube that covers the elastic tube directly or via a protective covering member, and the one or more reinforcing fibers, the plurality of insulated wires, and the elastic tube in a state where a predetermined tension is applied to the elastic tube. Along the outer circumference, there is an outer covering member in which fibers are woven at a predetermined braid density, and the elastic tube and the outer covering member are plastically deformed into a curl shape by a heat treatment.
Since one or more reinforcing fibers are twisted together with the plurality of insulated wires, the reinforcing fibers improve the mechanical strength such as tensile force.
[0020]
BEST MODE FOR CARRYING OUT THE INVENTION
(First Reference Example )
Figure 3 (a) ~ (c) is a diagram showing the construction of the elastic cord of the single core of a first reference example of the present invention, FIG. (A) is a perspective view, and (b) shows tension FIG. 3C is a vertical cross-sectional view when no tension is applied.
[0021]
The single-core elastic cord 10 has, for example, an outer diameter of about 1 mm, and is provided with one or a plurality of elastic fibers 11 having an outer diameter of about 0.8 mm at the center. The elastic fiber 11 has an elasticity of an elongation of several hundred percent, and when tension is applied, as shown in FIG. 1 (b), the length increases due to elastic deformation, the outer diameter decreases, and when the tension is released. As shown in FIG. 1 (c), the fiber is a fiber whose diameter is increased by contraction to its original length by elastic restoring force, and is made of, for example, polyurethane fiber.
[0022]
The outer periphery of the elastic fiber 11 is covered with a braid 12. The braid 12 is woven with a metal wire 12a such as a single wire or a stranded copper wire. The metal wire 12a such as a copper wire has, for example, an outer diameter of about 0.06 mm, and is formed of a bare wire or a covered wire covered with a synthetic resin such as polyurethane. The braid 12 has a predetermined tension applied to the elastic fiber 11, and the metal wire 12a is knitted at a predetermined braid density along the outer periphery of the elastic fiber 11, and when the tension is released, the elasticity of the elastic fiber 11 is reduced. When the elastic fiber 11 contracts due to the restoring force, the braid density of the metal wire 12a increases, and the outer peripheral surface of the elastic fiber 11 is covered in a pressed state.
[0023]
Such a single-core elastic cord 10 is manufactured, for example, as follows.
The elastic fiber 11 is wound on a drum in advance, and the metal wire 12a is wound on a bobbin. A plurality of bobbins around which a metal wire 12a is wound are set on a braiding machine, and elastic fibers 11 fed from a drum are set at the center. As shown in FIG. In a state where tension is applied, a plurality of metal wires 12a are hit around the elastic fiber 11 to form a braid 12. After the braid 12 is formed, when the tension on the elastic fiber 11 is reduced, the elastic fiber 11 contracts due to the elastic restoring force to increase the outer diameter as shown in FIG. Since the braid 12 is to be pushed and expanded in the outer diameter direction while shortening the length of the braid 12, the braid density of the braid 12 increases (that is, the distance between the braided metal wires decreases), and the braid 12 is pressed against the braid. At the outer peripheral surface of the elastic fiber 11. If the outer periphery of the elastic fiber 11 is covered with the braid 12 and then wound on a drum, the production of the elastic cord 10 is completed.
[0024]
When the single-core elastic cord 10 manufactured in this manner is used, the elastic cord 10 is cut into a predetermined length according to the application and connected to a headphone or a plug by soldering or the like. Transmission of electric signals from headphones or the like can be performed. Further, as described in the second embodiment, the outer periphery of the elastic cord 10 may be covered with an insulating covering member to be used for various purposes.
[0025]
The first reference example has the following operations and effects (1) and (2).
(1) Since the outer periphery of the elastic fiber 11 having an elongation of several hundred percent is covered with the braid 12 made of the metal wire 12a, when no tension is applied, the braid 12 having a high braid density is formed by the elastic fiber 11 When the outer peripheral surface is pressed against and tension is applied, the elastic fiber 11 expands, but the braid 12 pressed against the elastic fiber also expands due to the reduced braid density. At this time, the elastic fiber 11 is tightened in the central axis direction by the braid 12, and the elongation of the elastic fiber 11 is suppressed to several times, so that the cutting of the elastic fiber 11 can be prevented. Moreover, even if bending stress or tension is applied, the elastic cord 10 is elastically deformed in response thereto, so that it is difficult to cut, and the mechanical strength such as bending strength and tensile strength is large.
[0026]
(2) Even if tension is applied to the elastic cord 10 by pulling, hooking, or the like, the elastic cord 10 expands and contracts in response to the tension, so that a connection portion with a plug or a device does not break. Moreover, since it has elasticity, it is hard to be entangled, and it is easy to use.
[0027]
(Second reference example )
4 (a) to 4 (c) are configuration diagrams of a single-core elastic cord showing a second reference example of the present invention. FIG. 4 (a) is a perspective view, and FIG. 3 (c) is a vertical cross-sectional view when tension is not applied. Elements common to those in FIG. 3 showing the first reference example are denoted by the same reference numerals. ing.
[0028]
Stretchable cord of the single core 20 has an outer diameter periphery is insulated coated with the coating member 21 of the elastic cord 10 of FIG. 3 is an insulated wire of about 1.2 mm.
That is, the outer periphery of the elastic cord 10 of FIG. 3 having the braid 12 made of the metal wire 12 a woven on the outer periphery of the elastic fiber 11 is covered with the covering member 21. The covering member 21 is made of an insulating fiber having a thickness of several tens of deniers (however, the denier is a numerical value of 1 g of yarn of 9000 m is 1) (for example, non-vinyl chloride polyester, polypropylene, nylon, etc., which is environmentally friendly). (A synthetic fiber or the like) 21a. As shown in FIG. 4 (b), the covering member 21 is configured such that the insulating fibers 21 a are knitted at a predetermined braid density along the outer periphery of the braid 12 in a state where a predetermined tension is applied to the elastic fibers 11 and the braid 12. rarely, as shown in FIG. 4 (c), the tension is released, the greater the braid density of the insulating fiber 21a by the elastic fibers 11 in the elastic restoring force of the elastic fibers 11 contracts, braid 12 Is covered in a state where the outer peripheral surface is pressed.
[0029]
Such a single-core elastic cord 20 is manufactured, for example, as follows.
The elastic cord 10 of FIG. 3 including the elastic fiber 11 and the braid 12 is wound on a drum in advance. The braiding gun, bobbins insulative fibers 21a is wound a plurality sets, sets the stretchable cord 10 of FIG. 1 is unwound from the drum at the center, as shown in FIG. 4 (b), the expansion and contraction With a predetermined tension applied to the elastic cord 10, a plurality of insulating fibers 21a are struck around the elastic cord 10 and braided to form the covering member 21. After forming the covering member 21, reducing the tension on the elastic cord 10, as shown in FIG. 4 (c), the outer diameter shrinks the length of the stretch cord 10 by the elastic restoring force of the elastic fibers 11 The shrinkage increases the braid density of the covering member 21 pressed against the outer peripheral surface of the braid 12. If the outer periphery of the elastic cord 10 is covered with the covering member 21 and then wound on a drum, the production of the elastic cord 20 is completed.
[0030]
When the elastic cord 20 thus manufactured is used, it is cut into a predetermined length according to the use. The covering members 21 at both ends of the cut elastic cord 20 are peeled off to expose the braid 12 composed of the metal wire 12a. Then, if the exposed braid 12 is connected to a headphone, a plug, or the like by soldering or the like, the elastic cord 20 can transmit an electric signal from the headphone or the like.
[0031]
In the second reference example , in addition to the functions and effects of the first reference example , the following functions and effects (a) are further obtained.
(A) Since the covering member 21 is formed by braiding with the insulating fibers 21a, the entire cord can be reduced in weight and the mechanical strength can be improved. For this reason, the weight of the entire cord can be reduced to reduce the burden on the body when the cord is put on the neck or the like.
[0032]
(Third reference example )
FIG. 5 is a perspective view of a three-core elastic cord showing a third reference example of the present invention. Elements common to those in FIG. 4 showing the second reference example are denoted by the same reference numerals. ing.
[0033]
Stretchable cord 30 of the three-core has three insulated wires 20-1 to 20-3 that are each configured of an elastic cord 20 of the single core of Figure 4, of the three insulated wires 20-1 20-3 are covered with an outer covering member 31. The outer covering member 31 is formed of a braid knitted with insulating fibers (for example, synthetic fibers such as non-vinyl chloride polyester, polypropylene, and nylon, which are environmentally friendly). In a state where a predetermined tension is applied to the three insulated wires 20-1 to 20-3, the outer covering member 31 is configured such that the insulating fibers 31 a are provided along the outer circumferences of the insulated wires 20-1 to 20-3. When the braid is knitted at the braid density and the tension is released, the insulated wires 20-1 to 20-3 are contracted by the elastic restoring force of the insulated wires 20-1 to 20-3, so that the braid density of the insulating fiber 31a is reduced. As a result, the outer peripheral surfaces of the insulated wires 20-1 to 20-3 are covered in pressure contact.
[0034]
Such a three-core elastic cord 30 is manufactured, for example, as follows.
In advance, three insulated wires 20-1 to 20-3 are wound on a drum. A plurality of bobbins around which the insulating fibers 31a are wound are set on a braiding machine, and the insulated wires 20-1 to 20-3 fed from the drum are set at the center, and the insulated wires 20-1 to 20-3 are set. In a state where a predetermined tension is applied and the length is extended, a plurality of insulating fibers 31a are hit around the insulated wires 20-1 to 20-3 and braided to form the outer covering member 31. Thereafter, when the tension is reduced, the length is reduced by the elastic restoring force of the insulated wires 20-1 to 20-3, and the outer diameter is increased. .
The three-core elastic cord 30 thus manufactured can be used for various applications.
[0035]
In the third reference example , in addition to the functions and effects of the first and second reference examples , there are further the following functions and effects (b) and (c).
(B) The single core elastic cord 20 shown in FIG. 2 can be used for an application suitable for three cores.
[0036]
(C) By changing the color, the weaving method, and the like of the covering member 21 of the insulated wires 20-1 to 20-3, it is possible to perform a design with a high degree of freedom, thereby improving the decorative value.
[0037]
( 1st Embodiment)
Figure 1 (a), (b) the first is a configuration diagram of a stretchable cord 3 core illustrating an embodiment, FIG. (A) is a perspective view, and FIG. (B) is a longitudinal section of the present invention FIG.
The three-core elastic cord 40 has three insulated wires 41-1 to 41-3. Each of the insulated wires 41-1 to 41-3 has a metal wire 41a such as a single wire or a stranded copper wire, and the metal wire 41a is covered with a covering member 41b formed of a synthetic resin such as polyurethane. I have. A plurality of elastic fibers 42 are arranged around the insulated wires 41-1 to 41-3 along the insulated wires 41-1 to 41-3. Each elastic fiber 42 is substantially similar to the elastic fiber 11 in FIG. 3, for example, the outer diameter is formed at 0.8mm approximately polyurethane fibers have an elongation rate several hundred percent stretch, the tension A fiber whose length increases due to elastic deformation, the outer diameter decreases, and when the tension is released, the fiber shrinks to its original length due to elastic restoring force and increases in outer diameter.
[0038]
The outer periphery of the plurality of elastic fibers 42 is covered with an outer covering member 43. Outer covering member 43, substantially similar to the outer covering member 31 of FIG. 5, an insulating fibers (e.g., friendly non PVC-based polyester environmentally, polypropylene, synthetic fibers such as nylon) woven from 43a braid It is formed with. In a state where a predetermined tension is applied only to the plurality of elastic fibers 42, the outer covering member 43 is formed by knitting the insulating fibers 43a at a predetermined braid density along the outer periphery of the plurality of elastic fibers 42, and Is released, the elastic fiber 42 contracts due to the elastic restoring force of the elastic fiber 42, thereby increasing the braid density of the insulating fiber 43a and covering the outer peripheral surface of the elastic fiber 42 in a pressed state. .
[0039]
It is desirable that the three insulated wires 41-14 to 41-3 in the plurality of elastic fibers 42 have a twisted structure in order to prevent the wires from jumping out of the outer covering member 43.
[0040]
Such a three-core elastic cord 40 is manufactured, for example, as follows.
The three insulated wires 41-1 to 41-3 are twisted with a buncher and wound around a drum. The three insulated wires 41-1 to 41-3 wound around the drum are fed, and the elastic fibers 42 are arranged so as to cover the outer periphery thereof with a plurality of elastic fibers 42, and wound around the drum. On the other hand, the insulating fiber 43a for braiding is wound around a bobbin. In the braiding machine, a plurality of bobbins around which the insulating fibers 43a are wound are set, and a plurality of elastic fibers 42 covering the insulated wires 41-1 to 41-3, which are fed from a drum, are set at the center. In a state in which only a plurality of elastic fibers 42 are stretched by applying a predetermined tension, a plurality of insulating fibers 43a are beaten around the plurality of elastic fibers 42 and braided to form the outer covering member 43. .
[0041]
When the tension on the plurality of elastic fibers 42 is released, the length of the elastic fibers 42 is reduced by the elastic restoring force of the elastic fibers 42 to increase the outer diameter, and the shrinkage increases the braid density of the outer covering member 43. . When the outer diameter of the elastic fiber 42 is increased, the elastic fiber 42 is brought into pressure contact with the outer covering member 43 around the elastic fiber 42. When this is wound on a drum, the production of the elastic cord 40 is completed.
[0042]
The first embodiment has the following operations and effects (i) to (iii).
(I) In a state where tension is not applied, the plurality of elastic fibers 42 shrink, and accordingly, the insulated wires 41-1 to 41-3 inside also bend and shrink. When tension is applied, the plurality of elastic fibers 42 elongate, and the insulated wires 41-1 to 41-3 inside also elongate. Thereby, although the elasticity is slightly inferior to the elastic cord 30 of FIG. 5 , substantially the same operation and effect as those of the elastic cord 30 can be obtained.
[0043]
The (ii) covering member 41b of insulated wires 41-1~41-3, for example, when formed of a synthetic resin or the like, easier to manufacture than the insulated wire 20-1 to 20-3 in FIG. 5, This simplifies the manufacture of the elastic cord 40.
[0044]
(Iii) When the three insulated wires 41-1 to 41-3 are twisted, the insulated wires 41-1 to 41-3 protrude from the braided outer covering member 43 due to repeated bending and pulling. Can be prevented. Moreover, since the twisted insulated wires 41-1 to 41-3 are surrounded by the plurality of elastic fibers 42, the cross-sectional shape of the elastic cord 40 becomes substantially circular.
[0045]
(Second Embodiment)
Figure 2 (a), (b) the second is a configuration diagram of a curled elastic cord of an embodiment, FIG. (A) is a perspective view, and FIG. (B) the code portion of the present invention FIG.
[0046]
The curl-like elastic cord 50 is a single-core or multi-core (for example, three-core) curl-shaped cord, and one or a plurality of reinforcing fibers 51 and three insulated wires 52-1 to 52-. 3 is twisted. Insulated wires 52-1~52-3 is substantially similar to the insulated wire 41-1~41-3 in FIG 1 has a metal wire 52a of the copper wire or the like of the solid wire or stranded wire, the metal wire 52a is It is covered with a covering member 52b formed of a synthetic resin such as polyurethane. The outer circumferences of the reinforced reinforcing fibers 51 and the insulated wires 52-1 to 52-3 are covered with an elastic tube 54 via a protective covering member 53 such as paper. The elastic tube 54 is formed of an elastic synthetic rubber or the like.
[0047]
The outer circumference of the elastic tube 54 is covered with an outer covering member 55. The outer covering member 55 is formed of a braid made of fibers (for example, non-vinyl chloride-based synthetic fibers such as polyester, polypropylene, and nylon that are environmentally friendly) 55a. The outer covering member 55 is formed by applying a predetermined tension to the reinforcing fiber 51, the insulated wires 52-1 to 52-3, the protective covering member 53, and the elastic tube 54 along the outer circumference of the elastic tube 54. 55a is formed of a braid knitted at a predetermined braid density. Then, the elastic tube 54 and the outer covering member 55 are plastically deformed into a curl shape by the heat treatment.
[0048]
Such a three-core elastic cord 50 is manufactured, for example, as follows.
The reinforcing core wire 51 and the insulated wires 52-1 to 52-3 are twisted with a buncher, a protective covering member 53 is wound around the outside, and wound around a drum. The reinforcing fiber 51, the insulated wires 52-1 to 52-3, and the protective covering member 53 wound around the drum are fed, covered with an elastic tube 54 by an extruder, and wound around the drum. On the other hand, the fiber 55a for braiding is wound around a bobbin. A plurality of bobbins around which the fiber 55a is wound are set on the braiding machine, the elastic tube 54 fed from the drum is set at the center, and the tension is applied to the entire elastic tube 54. The outer covering member 55 is formed by striking a plurality of pieces 55a to form a braid, and winding the outer cover 55 around a drum. This is fed out of the drum, and when the outer covering member 55 and the elastic tube 54 are plastically deformed into a curl while heating, the production of the elastic cord 50 is completed.
[0049]
In the curled elastic cord 50 manufactured in this manner, when tension is applied, the pitch of the curled portion is increased and the length is increased, and when the tension is released, the pitch of the curled portion is reduced by the elastic restoring force. Shrink.
[0050]
In the second embodiment, the following operations and effects (a) and (b) are obtained.
(A) The curl portion expands and contracts by applying tension. At this time, since the elastic tube 54 is covered with the outer covering member 55 made of a braid that comes into pressure contact with the tube, the tube is lightweight and has high mechanical strength against bending and pulling.
[0051]
(B) The reinforcing core wire 51 is for improving the mechanical strength of the cord, and the protective covering member 53 is used for covering the twisted insulated wires 52-1 to 52-3 when covering them with the elastic tube 54. It is provided for facilitation and the like. However, since the mechanical strength is improved by the outer covering member 55 made of a braid on the outside, the reinforcing fibers 51 can be omitted. In addition, the protective cover member 53 can be omitted by devising a manufacturing method or the like. By omitting the reinforcing fibers 51 and the protective covering member 53 in this manner, the production material is reduced and the cost can be reduced.
[0052]
(Modification)
The present invention is not limited to the above reference examples and embodiments, and various modifications are possible. For example, there are the following modifications (I) and (II).
(I) Although the elastic cords 30, 40, and 50 in FIGS. 5 , 1 and 2 are three-core cords, these can be changed to two-core or four-core cords.
(II) The shapes, dimensions, materials, etc. of the elastic cords 10, 20, 30, 40, 50 of the reference examples and the embodiments can be changed to various ones.
[0053]
【The invention's effect】
As described in detail above , according to the first aspect, the elastic cord is provided, and the entire cord is elastically deformed even when bending stress or tension is applied, so that the mechanical strength such as bending strength or tensile strength is large. It is possible to provide a lightweight and easy-to-use elastic cord that is hardly broken and hardly entangled by elasticity.
[0055]
According to the second aspect , since the plurality of insulated wires are twisted, it is possible to prevent the insulated wires from jumping out of the braided outer covering member due to bending or the like.
[0056]
According to the third aspect , since the elastic fiber is formed of the polyurethane fiber, the expansion ratio can be increased.
[0057]
According to the fourth and fifth aspects of the present invention, the outer periphery of the elastic tube of the curl-like portion that can be extended and contracted is covered with the outer covering member made of braid in a pressed state, so that the outer covering member has high mechanical strength. improves. Therefore, it is possible to provide an elastic cord which is lightweight, has high mechanical strength, is hardly entangled, and is easy to use.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a three- core elastic cord showing a first embodiment of the present invention.
FIG. 2 is a configuration diagram of a curled elastic cord according to a second embodiment of the present invention.
FIG. 3 is a configuration diagram of a single- core elastic cord showing a first reference example of the present invention.
FIG. 4 is a configuration diagram of a single- core elastic cord showing a second reference example of the present invention.
5 is a perspective view of a third three-core stretchable code showing a reference example of the present invention.
[Explanation of symbols]
10, 20, 30, 40, 50 Elastic cord 11, 42 Elastic fiber 12 Braid 12a, 41a, 52a Metal wire 21, 41b, 52b Coating members 20-1 to 20-3, 41-1 to 41-3, 52 -1 to 52-3 Insulated electric wires 21a, 31a, 43a Insulating fibers 31, 43, 55 Outer covering member 51 Reinforcement fiber 53 Protective covering member 54 Elastic tube 55a Fiber

Claims (5)

単線又は撚線からなる複数本の絶縁電線と、A plurality of insulated wires consisting of a single wire or a stranded wire,
前記複数本の絶縁電線の周りに該絶縁電線に沿って配設され、伸び率数百%の伸縮性を有し、張力をかけると、弾性変形により長さが伸びて外径が小さくなり、該張力を解除すると、弾性復元力により元の長さに縮んで外径が大きくなる複数本の弾性繊維と、It is arranged along the insulated wires around the plurality of insulated wires, has stretchability of several hundred percent, and when tension is applied, the length increases due to elastic deformation, and the outer diameter decreases, When the tension is released, a plurality of elastic fibers whose outer diameter increases by contracting to the original length by elastic restoring force,
前記複数本の絶縁電線の周りに配設された前記複数本の弾性繊維にのみ所定の張力をかけた状態で、該複数本の弾性繊維の外周に沿って、絶縁性繊維が所定の編組密度で編まれ、該張力が解除されると、該弾性繊維の弾性復元力により該弾性繊維の外径が大きくなって該絶縁性繊維の編組密度が大きくなる外部被覆部材と、In a state in which a predetermined tension is applied only to the plurality of elastic fibers disposed around the plurality of insulated wires, the insulating fibers have a predetermined braid density along the outer circumference of the plurality of elastic fibers. An outer covering member in which the outer diameter of the elastic fiber is increased by the elastic restoring force of the elastic fiber and the braid density of the insulating fiber is increased when the tension is released,
を備えたことを特徴とする伸縮性コード。An elastic cord comprising:
請求項1記載の伸縮性コードにおいて、The elastic cord according to claim 1,
前記複数本の絶縁電線は、撚合されていることを特徴とする伸縮性コード。An elastic cord, wherein the plurality of insulated wires are twisted.
請求項1又は2記載の伸縮性コードにおいて、The elastic cord according to claim 1 or 2,
前記弾性繊維は、ポリウレタン繊維で形成したことを特徴とする伸縮性コード。The elastic cord, wherein the elastic fiber is formed of polyurethane fiber.
撚合された複数本の絶縁電線と、A plurality of twisted insulated wires,
前記複数本の絶縁電線の外周を、直接又は保護被覆部材を介して覆う弾性チューブと、An elastic tube that covers the outer periphery of the plurality of insulated wires directly or via a protective covering member,
前記複数本の絶縁電線及び前記弾性チューブに所定の張力をかけた状態で、該弾性チューブの外周に沿って、繊維が所定の編組密度で編まれた外部被覆部材とを有し、In a state where a predetermined tension is applied to the plurality of insulated wires and the elastic tube, along an outer periphery of the elastic tube, an outer covering member in which fibers are woven at a predetermined braid density,
前記弾性チューブ及び前記外部被覆部材が、加熱処理によりカール状に塑性変形されていることを特徴とする伸縮性コード。An elastic cord, wherein the elastic tube and the outer covering member are plastically deformed into a curl shape by a heat treatment.
1本又は複数本の補強繊維と共に撚合された複数本の絶縁電線と、A plurality of insulated wires twisted together with one or more reinforcing fibers,
前記1本又は複数本の補強繊維と前記複数本の絶縁電線との外周を、直接又は保護被覆部材を介して覆う弾性チューブと、An elastic tube that covers the outer periphery of the one or more reinforcing fibers and the plurality of insulated wires directly or via a protective covering member,
前記1本又は複数本の補強繊維、前記複数本の絶縁電線、及び前記弾性チューブに所定の張力をかけた状態で、該弾性チューブの外周に沿って、繊維が所定の編組密度で編まれた外部被覆部材とを有し、In a state where a predetermined tension is applied to the one or more reinforcing fibers, the plurality of insulated wires, and the elastic tube, fibers are woven at a predetermined braiding density along the outer periphery of the elastic tube. Having an outer covering member,
前記弾性チューブ及び前記外部被覆部材が、加熱処理によりカール状に塑性変形されていることを特徴とする伸縮性コード。An elastic cord, wherein the elastic tube and the outer covering member are plastically deformed into a curl shape by a heat treatment.
JP2002009957A 2002-01-18 2002-01-18 Elastic cord Expired - Fee Related JP3585465B2 (en)

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WO2008078780A1 (en) 2006-12-26 2008-07-03 Asahi Kasei Fibers Corporation Expandable electric wire and its manufacturing method
WO2009157070A1 (en) 2008-06-25 2009-12-30 旭化成せんい株式会社 Elastic signal transmission cable
WO2015074583A1 (en) * 2013-11-22 2015-05-28 东莞市瀛通电线有限公司 Elastic headphone wire manufacturing method and product
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WO2009157070A1 (en) 2008-06-25 2009-12-30 旭化成せんい株式会社 Elastic signal transmission cable
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WO2015074583A1 (en) * 2013-11-22 2015-05-28 东莞市瀛通电线有限公司 Elastic headphone wire manufacturing method and product
CN106409388A (en) * 2016-09-29 2017-02-15 东莞市瀛通电线有限公司 Improved elastic earphone line

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