< Topic >It improves with the easy-bending performance of the medical application guide wire which being concentric, possesses with the inside coil and the outer part coil in the Tip of the core belt and the rotary transmission performance to Tip side from labor assistant side. SolutionsOuter part coil junction 13 and the inside coil 14 to the Tip of core belt 11, duplex. Outer part coil winding direction of wire 8,9 of 13 and the inside coil 14 is made identical. At the time of revolution transmission in order two coils 13,14 reduction diameter or open enlarging to do, rotary transmission performance it improves. In outer part coil 13 and the inside coil 14 in identical position, outside it winds non-densely with core belt direction and section 13A and outside winds non-densely and forms section 14A. Being duplex coil structure, outside it winds non-densely and section 13A and outside winds non-densely and easy-bending performance improves with section 14A. Outside it winds non-densely and section 13A and outside winds non-densely and it prevents the fact that wire 8,9 engages by making the coil pitch of section differ 14A respectively. < Choice figure >Drawing 2【課題】芯線の先端部に内側コイルと外側コイルとを同心で有する医療用ガイドワイヤの易屈曲性能と、手元側から先端側への回転伝達性能とを向上させる。【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の素線8,9の巻き方向を同一にする。回転伝達時に二つのコイル13,14が縮径又は開拡するため、回転伝達性能を向上する。外側コイル13及び内側コイル14に芯線方向で同一位置に、外側疎巻き部13A及び外側疎巻き部14Aを形成する。二重コイル構造であっても、外側疎巻き部13A及び外側疎巻き部14Aによって易屈曲性能が向上する。外側疎巻き部13A及び外側疎巻き部14Aのコイルピッチをそれぞれ異ならせることにより、素線8,9同士が噛み合うことを防止する。【選択図】図2
