| 摘要 |
Disclosed is a vibration speaker configured to selectively supply an input current in accordance with the frequency of the input current in response to an incoming call, thereby allowing the incoming call to be recognized by sound or vibrations using a single element. The vibration speaker includes a housing having a hollow cylindrical structure opened at both ends thereof, the housing being attached, at one end thereof, with a vibrating plate adapted to generate sound and, at the other end thereof, with a shied plate adapted to shield the other end of the housing, a yoke centrally arranged in the interior of the housing and fixedly mounted to an inner peripheral surface of the housing by plate springs spaced apart from each other by a desired distance, a magnet attached to an upper end of the yoke to have N and S poles vertically aligned together, the magnet constituting a magnetic circuit, a voice coil having an upper end fixed to the vibrating plate, and a lower end arranged adjacent to the magnet, a vibration coil attached to one surface of the shield plate while facing the magnet, and damping means arranged at the inner peripheral surface of the housing and adapted to apply a damping property to the plate springs, thereby reducing a vibration in the amplitude of vibrations.
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