Patent ID: 7791456

Claim:
A vibrator comprising: a voice coil; a vibrating member that vibrates along an axial direction of the voice coil when the voice coil is excited by application of an alternating current to the voice coil, the vibrating member comprising a cup shaped yoke and a magnet disposed in the yoke, and a top plate securely stacked on the magnet; a suspension that supports the vibrating member vibratably in the axial direction, the suspension having a first suspension and a second suspension that support the vibrating member from an upper side and a lower side of the vibrating member, the first suspension comprising an inner peripheral portion that is fixed to an upper end surface of the yoke and an outer peripheral portion and the second suspension comprising an inner peripheral portion that is joined to a lower end surface of the yoke and an outer peripheral portion that is integrally formed with a tubular member; a casing that houses the voice coil, the vibrating member and the suspension with the outer peripheral portion of the first suspension fixed to the casing and the outer peripheral portion of the second suspension engaged with the casing; and a buffering member provided to face the vibrating member so that the vibrating member strikes the buffering member when a vibration amplitude of the vibrating member has exceeded a predetermined value in a resonance region around resonance point of the vibrating member, the buffering member being fixed to the vibrating member.