Audio playback device

• Main Authors: YOU, BONG, BAI, MING-SIAN, JHENG, TANG-YAO, LO, YI-YANG, CHANG, YU-MING
• Format: Patent
• Language: Chinese; English
• Published: 01.05.2015
• Subjects: DEAF-AID SETS; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKEACOUSTIC ELECTROMECHANICAL TRANSDUCERS; PUBLIC ADDRESS SYSTEMS

An audio playback device is provided. The audio playback device includes a magnetic module, a loop armature, a coil module and a diaphragm. The magnetic module includes a magnetic source and two conducting arms connected to two magnetic poles of the magnetic source and stretching to form a magnetic field. The loop armature includes a first, a second, a third and a fourth arms that form an empty area. At least part of the first arm is located in the magnetic area. The coil module is winded on the second arm and generates two varying electro-magnetic poles on the loop armature according to an altering current data signal. The loop armature vibrates according to a relation between the two varying electro-magnetic poles and the magnetic field. The diaphragm is connected to the loop armature through a driving rod to vibrate according to the loop armature to generate a sound wave.