Patent ID: 7619498

Claim:
A vibrator comprising: a casing having a bottom wall and a tubular side wall extending from said bottom wall; a substrate provided to close an opening of said tubular side wall opposite said bottom wall; a magnetic circuit assembly provided in said casing, said magnetic circuit assembly having a yoke with a bottom wall portion facing the bottom wall of said casing and a tubular peripheral wall portion extending from said bottom wall portion, said magnetic circuit assembly further having a magnet and a top plate that are successively stacked on the bottom wall portion of said yoke, wherein a magnetic gap is formed between an inner peripheral surface of the peripheral wall portion of said yoke and an outer peripheral surface of said top plate; a voice coil secured to said substrate and inserted into said magnetic gap in concentric relation to the peripheral wall portion of said yoke; a first suspension connected between said substrate and said magnetic circuit assembly; and a second suspension connected between said magnetic circuit assembly and the bottom wall of said casing; wherein said first suspension has at least one spring portion arcuately extending around said voice coil, said spring portion having an inner end and an outer end in a radial direction with respect to an axis of the peripheral wall portion of said yoke, said inner end being secured to said substrate, and said outer end being secured to said magnetic circuit assembly.