PROBLEM TO BE SOLVED: To improve rotation transmission performance to a distal end side of a medical guide wire and plastic deformation performance, and prevent a phenomenon of element wires of a coil engaging with each other.SOLUTION: An outer coil 13 and an inner coil 14 are made double and joined to a distal end of a core wire 11. Spring indexes C1 and C2 in the outer coil 13 and the inner coil 14, and torsional stresses τ1 and τ2 of an outer densely wound portion 13B and an inner densely wound portion 14B are made to be within a constant range. Initial tensions F1 and F2 of the outer densely wound portion 13B and the inner densely would portion 14B on a proximal side are increased so that rotation transmission performance to a distal end side is improved even when a coarsely wound portion is provided on the distal end side. A coil pitch Po of an outer coarsely wound portion 13A is made to be less than 2 times a diameter do of element wires 8A so that plastic deformation performance is improved, and the element wires are prevented from engaging with each other.COPYRIGHT: (C)2015,JPO&INPIT【課題】医療用ガイドワイヤの先端側への回転伝達性能及び塑性変形性能を向上させるとともに、コイルの素線同士の噛み合い現象を防ぐ。【解決手段】芯線11の先端部に、外側コイル13と内側コイル14を二重にして接合する。外側コイル13と内側コイル14におけるばね指数C1,C2と、外側密巻き部13Bと内側密巻き部14Bのねじり応力τ1,τ2とを一定範囲とする。手元側の外側密巻き部13B及び内側密巻き部14Bの初張力F1,F2を高めたことにより、先端側に疎巻き部が設けられた場合であっても、先端側への回転伝達性能が向上する。外側疎巻き部13AのコイルピッチPoを素線8Aの直径doの2倍未満とすることにより、塑性変形性能が向上し、素線同士の噛み合いも無くなる。【選択図】図2
