Patent ID: 9185494
Filing Date: 2015-11-10
Classification: H04R

Abstract:
1. An inner magnet type micro-speaker, comprising: a frame; a yoke installed inside of the frame and comprising a bottom surface and sidewalls bent upward from the bottom surface; a magnet bonded to an inside of the yoke; a voice coil located in a gap portion between the sidewalls of the yoke and the magnet; a diaphragm that vibrates by the voice coil; and a suspension where the diaphragm and the voice coil are attached, and which guides vibrations of the diaphragm and the voice coil and comprises a ring-shaped inner peripheral portion and an outer peripheral portion that surrounds the inner peripheral portion, spaced a predetermined distance apart from the inner peripheral portion, with one end and another end being connected to the inner peripheral portion, wherein the frame comprises a stepped portion for accommodating the outer peripheral portion of the suspension, wherein the diaphragm comprises a center diaphragm attached to the inner peripheral portion and a ring-shaped side diaphragm attached to the outer peripheral portion and the inner peripheral portion, and the side diaphragm is seated on the frame and the outer peripheral portion of the suspension is accommodated in the frame, wherein, of the outer peripheral portion of the suspension, the part which is not accommodated in the stepped portion is smaller in thickness than the part which is accommodated in the stepped portion, and therefore does not come into contact with the side diaphragm.