POSITIONING MECHANISM FOR ROTARY MAGNETIC HEAD OF MAGNETIC DISK DEVICE

摘要

PURPOSE:To ensure the positioning with high accuracy, by attaching a dynamic vibration absorber to a shaft and suppressing the vibration of a shaft magnetic head. CONSTITUTION:A dynamic vibration absorber 11 is attached to a shaft 2 to suppress the resonance. This absorber 11 contains a weight 12 and a viscoelastic matter 13. The resonance frequency of the absorber 11 is approximately coincident with that of the shaft 2. When the shaft 2 has resonance, the weight 12 has resonance with a larger amplitude to absorb the vibrating energy of the shaft 2. Thus the vibration of the shaft 2 is suppressed. This reduces the vibration of a magnetic head 7 to ensure the positioning with high accuracy.