Patent ID: 9154884
Filing Date: 2015-10-06
Classification: H04R

Abstract:
1. An electro-acoustic transducer, comprising: a frame defining a plurality of sidewalls for forming a receiving space; a magnetic circuit unit accommodated in the receiving space, the magnetic circuit unit comprising: a lower plate; a main magnet positioned on a central portion of the lower plate; a pair of auxiliary magnets positioned on two side portions of the lower plate respectively and positioned spaced from the main magnet for forming a magnetic gap, a pair of upper plates, each including a base body attached on a top surface of each auxiliary magnet and integrated with the sidewalls; wherein, the base body comprises a first side away from the main magnet and integrated with the sidewalls, and a second side opposite to the first side; the upper plate comprises a plurality of restricting parts connected with the base body, arranged on the second side, positioned spaced from each other and engaging with an inner surface of the auxiliary magnet facing the main magnet, all of the restricting parts divided into a pair of first restricting parts positioned on two ends of the second side respectively and a plurality of second restricting parts positioned therebetween; and a vibration unit including a voice coil and a diaphragm connected with the voice coil; the voice coil partially received in the magnetic gap.