| 摘要 |
<P>PROBLEM TO BE SOLVED: To suppress curve and variations in distance of yokes without adversely affecting a direction of a line of magnetic force. <P>SOLUTION: A flat speaker includes: a first yoke of a magnetic body; a second yoke of a magnetic body; a diaphragm arranged between the first yoke and the second yoke; a magnet group in which N-poles and S-poles of a plurality of magnets are alternately arranged in the first yoke so as to face the diaphragm side; a conductor pattern provided in the diaphragm in a direction interlinking with a line of magnetic force between adjacent N-poles and S-poles of the magnet group; holes provided at positions where the conductor pattern is not provided in the diaphragm; and a distance maintaining member arranged so as to penetrate the holes and to maintain a predetermined distance between the first yoke and the second yoke. <P>COPYRIGHT: (C)2013,JPO&INPIT |
