Patent ID: 6404085
Filing Date: 2002-06-11
Classification: B06B,H02K,H04R

Abstract:
A notifying vibration generator characterized in that the generator comprises a first vibrator having a permanent magnet and supported by a first spring body on a first fixing member, and a second vibrator having a coil so disposed as to intersect the magnetic flux of the permanent magnet and supported by a second spring body on a second fixing member, the first spring body being in the form of a disc having spiraling slits extending from its periphery toward its center portion,the first vibrator comprising a yoke mounted on one of the magnetic poles of the permanent magnet and positioned radially inside of the coil of the second vibrator, and another yoke mounted on the other magnetic pole of the permanent magnet of the first vibrator and surrounding an outside of the coil, said another yoke having a first segment defining a vertical wall portion substantially coextensive with the height of the coil of the second vibrator to increase mass of said another yoke and a second segment of less height than said first segment extending radially from said first segment to be fitted to said permanent magnet. the first vibrator and the first spring body serving as a vibration source for transmitting vibration to the fixing member, and the second vibrator and the second spring body serving as a sound source for producing sound waves of audio-frequency for propagation to outside.