| 摘要 |
PROBLEM TO BE SOLVED: To provide a compact and high-power earphone capable of hearing air conduction sound and bone conduction sound with low power consumption.SOLUTION: An earphone includes: an armature part where a pair of plates 3, 4 to which a pair of coils 5, 6 are respectively attached are respectively fixed to both surfaces of an armature 2; cases 9, 10 to which the armature part is attached; and a pair of magnets 7, 8 attached to inner side surfaces of the cases 9, 10 facing the pair of plates 3, 4. The earphone has a balanced electromagnetic structure where the pair of plates 3, 4, the pair of coils 5, 6, and the pair of magnets 7, 8 are arranged symmetrically with respect to the armature 2 and the centers of the armature 2 and the plates 3, 4 are arranged on a center axis C of the magnets 7, 8. |
