| 摘要 |
PROBLEM TO BE SOLVED: To provide a magnetic circuit in which a magnetic flux density is increased, sound reproduction efficiency is improved and a magnetic flux to be leaked to the outside is reduced even when using a resin magnet with which a magnetic flux density in a magnetic gap is easy to decrease, and an electrodynamic speaker employing the same.SOLUTION: A magnetic circuit for an electrodynamic speaker comprises a magnet which has an annular base specified by a first plane and a second plane which are parallel to each other, an annular plate whose lower surface is connected to the first plane, and a pole including a columnar part forming a magnetic gap between an under plate part connected the second plane and the plate. The magnet is magnetized to have polarities different from each other at a side of the first plane and at a side of the second plane. In a first range in a radial direction of the base, the magnet is oriented and magnetized in an orthogonal direction which is orthogonal to the first plane and the second plane and in a second range in the radial direction different from the first range of the base, the magnet is oriented and magnetized in a direction different from the orthogonal direction. |
