ELECTROMAGNETIC TRANSDUCER

PROBLEM TO BE SOLVED: To obtain an electromagnetic transducer which easily connects a coil pattern of a vibrating film and a connection terminal prepared in a frame without preparing a notch in a permanent magnet plate, and suppressing occurring of large stress in a connection part. SOLUTION: The transducer is provided with: permanent magnet plates 2, 6 with magnetizing patterns in the plate surfaces; the vibrating film 4 which makes a meander line coil pattern 16 on the film surface face with the magnetizing pattern of the permanent magnet pattern 2, 6; buffer materials 3, 5 arranged in spaces between the permanent magnets plates 2, 6 and the vibrating film 4; a lower frame 1 and an upper frame 7 which laminate the permanent magnet plates 2, 6, the buffer materials 3, 5, and the vibrating film 4, cover, and support; and a terminal block 12 which is arranged in the lower frame 1, and performs external connection. The vibrating film 4 is provided with electrodes 17 which prepares end parts of the meander line coil pattern 16, are horizontally extended from edge ends of the film surface, and are connected to a connection terminal 11 which is comprised in the terminal block 12. COPYRIGHT: (C)2008,JPO&INPIT