MAGNETIC CIRCUIT FOR A SPEAKER AND SPEAKER USING SAME

摘要

A magnetic circuit for a speaker comprises a magnet and at least an upper plate. The magnet is formed of bonded magnets. The magnet and the upper plate are constituted so as to satisfy at least one of the conditions: the internal diameter dimension of the magnet and the internal diameter dimension of the upper plate are the same; or the external diameter dimension of the magnet and the external diameter dimension of the upper plate are the same. In this way, a magnetic circuit can be produced that is lightweight and efficient, without wasted space in the interior of the magnetic circuit or without the magnet protruding to the outside.