SPEAKER HAVING MULTI-LAYERED DIAPHRAGM FOR IMPORVING THE SPECIFIC MODULUS

摘要

A speaker having a vibration plate of specific rigidity comprises: a housing having an installation space prepared therein; a permanent magnet for generating magnetic flux, which is disposed in the installation space; a coil which is adjacent to the permanent magnet, and is wound around a bobbin as vertically moved by Fleming′s left hand rule if a current is applied thereto; a first vibration plate layer installed on an upper part of the bobbin, and vertically vibrating as the coil moves; and a second vibration plate layer having specific rigidity greater than specific rigidity of the first vibration plate layer, and stacked on the first vibration plate layer. The speaker having a vibration plate of specific rigidity according to exemplary embodiments can variously set a resonance frequency and a speaker frequency, and improve output of the speaker.