| 摘要 |
PURPOSE:To obtain magnetic field constitution that has a magnet of ferrite material as its main body, and effective and with fidelity to input. CONSTITUTION:Magnetic powders of ferric oxide and barium carbonate are aligned in the direction from the half inside diameter to the half outside dismeter applied a magnetic field, two of which 3a are joined in 3b plane to compose a magnet. Its radiation field is shown by an arrow mark. This is arranged between the inside pole face 2 and it is to have an appropriate space 4. For instance, when this is applied for a speaker, an effect on a practical use such as electromagnetic force with fidelity to the input is available. |
