| 摘要 |
PURPOSE:To reduce greatly the distortions by deleting all magnetic materials from a magnetic sound or video recording head and a magnetic reproduction head. CONSTITUTION:A lead wire 5 having an oblong (flat) section is wound spirally (one or several turns at most). A number of such spiral coils are collected to form a shape similar to a circle (doughnut). A gap is formed to such a troidal coil to be used for a magnetic head. These coils are connected to each other with steps formed at the joints to eliminate gaps at these joint areas. This secures magnetic recording with no distortion. At the same time, an extremely thin lead wire is used to produce a spiral coil 2 for magnetic reproduction. This coil 2 is set rectangularly to a tape 3 to secure magnetic reproduction with no distortion. |
