Broadband linear vibrator and mobile terminal
A broadband linear vibrator that is small sized and yet capable of generating a greater vibrating force and outputting various broadband vibrations, and a mobile terminal capable of outputting various vibrations and sounds, wherein the broadband linear vibrator includes 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, 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 than a frequency band to a minimum use frequency, such that various feelings of vibrations and sounds can be advantageously provided by the broadband linear vibrator.
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.
2. The broadband linear vibrator of claim 1 , wherein each of the outer magnet and the inner magnet has an opposite polarity toward a vibrating direction of the oscillator.
3. The broadband linear vibrator of claim 1 , wherein a cubic rate between the external magnet and the inner magnet is in the range of 0.8˜1.
4. The broadband linear vibrator of claim 1 , wherein a use frequency is set up to separately set up a vibration mode and a sound mode.
5. The broadband linear vibrator of claim 4 , wherein the vibration mode is set up within the maximum use frequency of 300 Hz.
6. 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 the linear vibrator generates an oscillating frequency capable of detecting in the range of 30˜150 Hz before and after resonant frequency. and
wherein at least one of the upper plate and the bottom plate is formed with a magnetic substance.
7. The broadband linear vibrator of claim 6 , wherein each of the outer magnet and the inner magnet has an opposite polarity toward a vibrating direction of the oscillator.
8. The broadband linear vibrator of claim 6 , wherein a cubic rate between the outer magnet and the inner magnet is in the range of 0.8˜1.