| 摘要 |
PURPOSE:To obtain a small type, lightweight and compact transformer in which no magnetic flux leakage is generated, the efficiency is improved and a coil winding work can be facilitated. CONSTITUTION:A core 10 having doughnut-shaped space 12 and a coil introducing hole and communicating with the doughnut-shaped space 12 formed on the side wall surface, the first conductive film material 110 formed by printing a plurality of narrow conductive layer on the surface of a band-like insulating film, and the second conductive film material 120, which is formed by printing a plurality of thick conductive layers in stripe shape on the surface of the band-like insulation film, are laminated and a coil body 100 which is formed by putting into the doughnut-shaped space 12 of the core 10 from the coil introducing inlet. |
