| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an earphone cable which endures external damage such as rubbing and press flaws, on which a folding habit scarcely remains even when subjected to storage operation by repeated bending, and with which a feeling of beauty is given.SOLUTION: An earphone cable has: an insulating wire 2 including a high tension fiber 5, spirally wound wires 7, 8 formed by spirally winding a conductor 6 on an outer periphery of the high tension fiber 5, and an insulator 9 to cover outer peripheries of the spirally wound wires 7, 8; and a jacket 4 covering the outer periphery of twisted insulating wires 2. The insulator 9 is composed of a natural colored fluororesin, the jacket 4 is composed of a natural colored nylon resin or an ultraviolet resistant PVC. When a spirally winding outer diameter of the spirally wound wires 7, 8 is represented by d, an outer diameter of the conductor 6 is represented by d, and d-dis represented by p, a spirally winding pitch p of the conductor 6 is made to satisfy 8×p≤p≤12×p.</p> |
