| 摘要 |
PURPOSE:To reduce the compressive load effecting on the inside of the flat wire and tensile load affecting on the outside thereof by forming the corner for the flat wire winding surfaces of the coil spool main frame into a shape where its convex corner part is rounded off. CONSTITUTION:The coil spool main frame 1 is shaped into a L-cross section which is mounted on the corner 3 of the iron core 2. This main frame 1 has a side faces 4a and 4b which are parallel to the two sides 2a and 2b of the iron core 2 on the flat wire winding surface 4. These are connected along the corner surface 4c. This corner surface 4c is formed into a shape where its convexed corner is rounded off. The flat wire C is wound edgewise on the coil winding frame constructed in such method so that, at the surface 4c, the flat wire C expands in a circular arc-shape through the bending processing, thereby forming a escape margin 6 between the flat wire C and the surface 4c, with a sufficiently reduced into core dimension for high-frequency application. If the load and tensile load compression produced on the flat wire C increase, the flat wire escapes into this escape margin, with less deformation level of the flat wire C to be formed into a trapezoid. |
