| 摘要 |
PURPOSE:To achieve a diaphragm plate for throughout drive dynamic speaker excellent in heat resistance, by insulating aluminum foil partially with anodic oxidation processing and drawing a pattern as a conductor for the rest part. CONSTITUTION:A conductor 3 is formed at the center of a disphragm plate formed with aluminum foil, and this conductor 3 is isolated from the rest 7 of aluminum foil at surrounding with an anodic oxidation section 8 which is processed for anodic oxidation to a specific part of the aluminum foil and formed through broadwise the aluminum foil. The section 8 shows electric insulation at drying state and the aluminum part sectioned with the section 8 for the surrounding acts like a conductor, and when a current for speaker drive from terminals 9, 10 of the conductor 3 in a magnetic field through the assembling with a speaker, the diaphragm plate 1 is driven and sound waves are radiated to front space of the diaphragm plate 1. |
