Patent ID: 8073172
Filing Date: 2011-12-06
Classification: H02J,H04R

Abstract:
1. A speaker, comprising: a casing comprising a side wall; a sound emitting portion received in the casing, and comprising a diaphragm, the diaphragm comprising a first end fixed to the casing and an opposite second end; a conductive coil received in the casing, and comprising a front end and a rear end, the front end fixed to the side wall, the rear end fixedly connected to the second end of the diaphragm; and a circuit board comprising an audio processing module, a charging module and a controlling module, the audio processing module configured for receiving an audio signal and controlling the conductive coil to vibrate in response to the received audio signal, the charging module configured for electrifying the conductive coil using alternating current, the controlling unit configured for selectively connecting the conductive coil to the audio processing module electrically or to the charging module.