Being production manner of bobbin equipped voice coil of angular die or track/truck die for voice coil and use this the electroacoustic transducer and the electronic equipment null

摘要

PROBLEM TO BE SOLVED: To provide a manufacturing method of a voice coil for an electroacoustic transducer used for various acoustic equipment whereby an output sound pressure level can be enhanced.;SOLUTION: The manufacturing method of the voice coil for the electroacoustic transducer is configured such that a bobbin 28b is coupled with a coil 28a of the voice coil wound in advance on an air core in a shape of a polygonal type or a truck type to configure the voice coil thereby obtaining the polygonal or truck type bobbin attached voice coil the magnetic flux utilizing the efficiency of which is enhanced. Thus the magnetic flux utilizing efficiency of the voice coil is enhanced and the output sound pressure level of the electroacoustic transducer using the voice coil can be improved.;COPYRIGHT: (C)2007,JPO&INPIT