| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an exciter which is compact and simple in structure and is capable of extending a range of amplitude, and also to provide a speaker having a superior reproduction characteristic by using this exciter. Ž<P>SOLUTION: The speaker S1 comprises a rectangular plate-like diaphragm 20 and the exciter E2 connected to the diaphragm 20 via a driving arm 24. The exciter E2 is equipped with a strut 2, an excitation arm 13 pivotably attached to the strut 2, a planar movable coil 4 retained in a through-hole 13b formed in the excitation arm 13, tabular magnets 5 which are disposed to hold the movable coil 4 from top and bottom directions and apply a magnetic field to the movable coil 4, and a yoke 8 for holding the magnets 5. When current based on a sound signal is applied to the movable coil 4, the excitation arm 13 swings around the strut 3. The swinging motion of the excitation arm 13 is transmitted to the diaphragm via the driving arm 24 and is converted into a sound signal. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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