Patent ID: 8379906
Filing Date: 2013-02-19
Classification: H04R

Abstract:
1. A sensory signal output apparatus configured so that a coil ( 14 ) is disposed in a gap between a magnet/top plate ( 11 ) ( 12 ) and a yoke ( 13 ), and a portion elastically supported in a free space vibrates in reaction to magnetic flux generated in the gap in a direction of an alternating current signal applied to the coil ( 14 ) to generate sound and/or vibration, wherein the yoke ( 13 ) has a groove ( 13 a ) formed at a side other than that with the magnet ( 11 ), and the groove ( 13 a ) has a diameter smaller than that of the magnet ( 11 ) and is provided at an inner edge portion thereof with a magnetic fluid ( 20 ).