Portable telephone using bone conduction device

Abstract

A portable telephone using a bone conduction speaker, enabling production of high output without any increase in thickness of a housing of a telephone body and having no problem in use in a noisy environment. In the telephone: a bone conduction speaker ( 1 ) is used as a speaker; a concave portion ( 3 ) having a diameter larger than that of the bone conduction speaker ( 1 ) is provided in a housing ( 2 ) of a telephone body; a cushioning material ( 4 ) is installed between the inner surface of the concave portion ( 3 ) and the outer surface of the bone conduction speaker ( 1 ); the bone conduction speaker ( 1 ) is supported on the cushioning material ( 4 ) to provide a gap between the speaker and the bottom of the depression ( 3 ); and, the vibration surface of the speaker is flush with or slightly extended outward from the surface of the housing ( 2 ).