| 摘要 |
A diaphragm of an electronic sound converter is provided to restrict induction vibration of a thin film type diaphragm which is relatively lighter than a magnetic circuit, thereby preventing vibration loss of the magnetic circuit as much as the amount of vibration of the diaphragm. A center area of a diaphragm(12) is fixed to one side of a coil(11). An external surface of the diaphragm is arrested in an open end of a case. The diaphragm is vibrated according to a change of a current signal applied to a coil about a magnetic flux formed among a yoke, a magnet and a top plate. A support member limits that the diaphragm is sensitively vibrated by an external force. The support member is fixed to one side of the diaphragm. The support member is formed with a curved surface equal to a curved surface of the diaphragm. The support member is a thin film metal plate spring. |
