Patent ID: 9332328
Filing Date: 2016-05-03
CPC Classification: H04R

Claim Text:
1. A magnetic yoke used for a moving-iron microphone/transducer, comprising an inner through hole, an enclosed soft magnet and two end surfaces orthogonal to the enclosed soft magnet, wherein: an outer peripheral surface of the enclosed soft magnet is connected with an armature of the moving-iron microphone/transducer, the inner through hole is configured to connect with a magnetic piece of the moving-iron microphone/transducer, and one of the two end surfaces is connected with an induction coil of the moving-iron microphone/transducer to form a vibrating/transducing drive mechanism; the outer peripheral surface of the enclosed soft magnet is connected with the armature of the moving-iron microphone/transducer by resistance welding, laser welding, or ultrasonic welding; and the magnetic yoke comprises a closed, polygonal, cross-sectional profile having chamfers along each connecting vertex.