| 摘要 |
PURPOSE: A speaker is provided to concentrates a magnetic line of force therein by adopting an additional magnet-and-pole member assembly. CONSTITUTION: An earphone comprises a housing, an ear muff, a speaker unit(10), and a signal input code. The ear muff is fixed to the housing. The ear muff limits a receiving space for arranging the speaker unit and the housing. The signal input code is electrically connected to the speaker unit through the housing. The speaker unit comprises a ferrite-yoke plate(11), an inner magnet(12), a first pole member(13), an external magnet(14), a second poll member(15), and a diaphragm(16).
|
