| 摘要 |
PURPOSE:To assure the insulation between a magnetic block of an R/W core and a wiring and at the same time to avoid the deterioration of magnetic efficiency, by laminating a nonconductive magentic material to the side face of the magnetic block of the R/W core to form a winding part of the R/W core. CONSTITUTION:Erasing cores 12 and 14 are formed by bonding with glass magnetic blocks 32A and 32B, the 2nd magnetic blocks 34A and 34B, nonmagnetic ceramic blocks 36A and 36B and the 3rd magnetic blocks 42A and 32B respectively. The 3rd blocks form a winding part of an R/W core 10 together with the 1st block 20, and the 3rd blocks are set opposite to each other inside the winding. Therefore no consideration is required for the insulation between the block 20 and the winding if the block 20 is made of a magnetic material of high permeability as long as the 3rd blocks are made of nonconductive magnetic materials. The section area of a magnetic path of the winding part of the core 10 equals to the sum of the 1st and 3rd blocks. Thus the deterioration is avoided for the magnetic efficiency. |
