Patent ID: 8150071

Claim:
A voice output unit, comprising: a power source that supplies power to the voice output unit; a signal processing module that processes voice signals received from an external source; an amplifier module that amplifies the voice signals processed by the signal processing module; an output module that transmits the amplified voice signals as voices; and a stereoscopic circuit board on which the power source, the signal processing module, the amplifier module and the output module are assembled, and that includes electrodes which are in electrical contact with electrodes of the power source, the signal processing module, the amplifier module and the output module when assembled, wherein at least one of the power source, the signal processing module, the amplifier module and the output module includes a projection, wherein the stereoscopic circuit board has at least one recess configured to receive one of the power source, the signal processing module, the amplifier module and the output module, and wherein the projection is fitted with the at least one recess such that at least two surfaces of the at least one recess contact the projection.