Earphone

[0011]FIG. 1 is a perspective view of an earphone showing the position of an alter switch mounted on the earphone body. The earphone 1 includes an earphone plug 2, a communication line 3, two earphone bodies 4 and 5, two alter switches 6 and 7 are mounted on the earphone bodies 4 and 5 respectively. The earphone plug 2 connects with the earphone bodies 4 and 5 via the communication line 3, the earphone plug 2 is used for receiving audio signals from a media player (not shown), the earphone bodies 4 and 5 are used for converting the audio signals to an audible sound. The earphone bodies 4 and 5 have the same properties, hereinafter, the earphone body 4 is employed to illustrate the present invention.

[0012]Shown as FIG. 2, the earphone body 4 includes an insulated rod 12, a magnetic rod 13, a ferromagnetic plate 14, a diaphragm 15, an adjustable impedance unit 16, a housing 17 and a cover 18. The alter switch 6 is also mounted in the housing 17. The diaphragm 15 is supported by the ferro