Patent ID: 8064631
Filing Date: 2011-11-22
Classification: H04R

Abstract:
1. An electroacoustic transducer including a magnet plate the entirety of which is formed to be disk-shaped or ring-shaped, and a disk-shaped or ring-shaped acoustic diaphragm provided with a planar coil disposed parallel to the magnet plate and formed by spirally winding an electric conductor; wherein the electroacoustic transducer is provided with at least any one of a center area magnet magnetized so that a component parallel to the center axis of the acoustic diaphragm is turned into the forward direction of the acoustic diaphragm at the position that becomes the center side of a base area magnet and an outer circumference area magnet magnetized so that a component parallel to the center axis of the acoustic diaphragm is turned into the backward direction of the acoustic diaphragm at the position that becomes the outer circumference side of the base area magnet, in addition to the base area magnet magnetized so that a component parallel to the vibration plane of the acoustic diaphragm is turned into the radius direction toward the center of the acoustic diaphragm with respect to the magnetization direction of respective partial areas of a magnet plate.