Patent ID: 9071909
Filing Date: 2015-06-30
Classification: H04R

Abstract:
1. A multifunctional electromagnetic transducer, comprising: a bracket ; a vibrating unit receiving in the bracket and including a magnetic circuit part with a magnetic gap, the magnetic circuit part including a pole plate, a first magnet fixed at a central portion of the pole plate, a plurality of second magnets disposed surrounding the first magnet; a voice coil partially inserted into the magnetic gap; an assistant part assembled to the bracket for suspending the magnetic circuit part in the bracket; wherein the assistant part includes a plurality of helical wound springs defining a retaining end assembled to an inner face of the bracket, a connecting end attached to the vibrating unit, and a helical spring coil extending from the retaining end to the connecting end, the helical wound spring being capable of deformations along a direction parallel to the vibrating direction of the vibrating unit, and along a direction perpendicular to the vibrating direction; each of the second magnets forms a receiving gap corporately with an adjacent second magnet for receiving a corresponding helical wound spring.