Patent ID: 8912693
Filing Date: 2014-12-16
Classification: B06B,H02K,H04M

Abstract:
1. A broadband linear vibrator, comprising: a case; a spring coupled to the case; an oscillator including a magnet for elastically supporting the spring and a stator formed inside the case for vibrating the oscillator; an upper plate formed between the spring and the magnet, wherein the magnet includes an outer magnet disposed at a periphery of the upper plate and an inner magnet that is centrally disposed: and a bottom plate formed at a bottom end of the magnet, wherein a frequency band to a maximum use frequency that is detectable as a vibration or a sound source based on a resonant frequency is 1.2 times greater than a frequency band to a minimum use frequency, and wherein at least one of the upper plate and the bottom plate is formed with a magnetic substance.