| 摘要 |
PURPOSE: A linear oscillation motor including magnetic fluid is provided to reinforce magnetic connection between a permanent magnet and a yoke and between an elastic member and an external case by reinforcing magnetic flux flowing through the permanent magnet, the yoke, the elastic member, and the external case. CONSTITUTION: A cubic external case(1) is prepared. A permanent magnet(3) is attached to the center of the upper side of the external case. A spring member(5) is attached to the lower side of the external case. A vibrator(7) vibrates in a vertical direction to the external case by interaction with the magnetic force from the permanent magnet. A plate(33) is made of ferromagnetic material to concentrate the magnetic field of the permanent magnet on the lower side of the permanent magnet.
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