Patent ID: 7528509
Filing Date: 2009-05-05
Classification: H04R

Abstract:
1. A multifunction-type vibration actuator, having a housing accommodating a magnetic circuit part, a suspension elastically supporting said magnetic circuit part in said housing, a diaphragm facing said magnetic circuit part, and a voice coil provided to said diaphragm and inserted into a magnetic gap of said magnetic circuit part, an input of a signal with a vibration frequency to said voice coil to allow vibration of said suspension secured to said magnetic circuit part to be transmitted outward through said housing, the suspension comprising: an outer circumferential portion, a plurality of deflectable arms, each of the plurality of deflectable arms has a first end connected to the outer circumferential portion, and a second end, an annular portion connected to the second end of each of the plurality of deflectable arms, the annular portion is nested within the outer circumferential portion and is connected with the outer circumferential portion via the plurality of deflectable arms. and a plurality of secured positions disposed on the annular portion in the vicinity of the second end of each of the plurality of deflectable arms, the plurality of secured positions are configured to be bonded to said magnetic circuit part, wherein a central vibration position of said suspension and said housing is selectable by selecting one of the plurality of securing planned position and bonding the suspension to the magnetic circuit at the selected secured planned position according to a characteristic of said suspension and according to a weight of said magnetic circuit part.