Patent ID: 8948423
Filing Date: 2015-02-03
Classification: H04R

Abstract:
1. A micro speaker for converting an electrical signal into an acoustic signal, the micro speaker comprising: a high-pitched sound speaker unit disposed in an outer case; and a low-pitched sound speaker unit disposed in the outer case together with the high-pitched sound speaker unit, wherein the high-pitched sound speaker unit and the low-pitched sound speaker unit are disposed in the outer case so that a high-pitched sound vibrating plate of the high-pitched sound speaker unit and a low-pitched sound vibrating plate of the low-pitched sound speaker unit have directions opposite to each other, wherein a high-pitched sound frame of the high-pitched sound speaker unit is provided with a high-pitched sound rear opening opened toward a rear of the high-pitched sound vibrating plate, and a low-pitched sound frame of the low-pitched sound speaker unit is provided with a front opening and an auxiliary opening opened toward a front of the low-pitched sound vibrating plate, and wherein the high-pitched sound speaker unit has a size smaller than that of the low-pitched sound speaker unit and the high-pitched sound rear opening is disposed on a straight line with the auxiliary opening.