Patent ID: 7321532

Claim:
A protection device of a read and write medium apparatus for ensuring the minimum damage to the apparatus when said apparatus under an external force, comprising: a central processing unit for recording and restoring the operation status of said apparatus; a detective unit for detecting the external force and reckoning a value of the external force, wherein when the value is greater than a critical point, said detective unit sends an attack signal and when the external force is removed said detective unit sends a restoring signal; a first arithmetic unit for informing said central processing unit of recording and restoring a operation status of said protection device, said first arithmetic unit sending an interrupting signal when receiving the attack signal and sending a recovering signal when receiving the restoring signal; a read and write medium unit for storing, reading and writing data; a switch unit for controlling a power source of said protection device, said switch unit resetting a power of said read and write medium unit when receiving the recovering signal; an electricity control unit for achieving the electricity saturation while said read and write medium unit is operating, discharging electricity while said read and write medium unit cuts off the power; and a second arithmetic unit for evaluating a condition of said electricity control unit, said second arithmetic unit sending a saturation interrupting signal when receiving the interrupting signal during the electricity saturation condition; sending a saturation restoring signal when receiving the recovery storing signal during the electricity saturation condition; wherein said central processing unit recording the operation status and carrying out the power cut-off when receiving the interrupting signal; compelling to the power cut-off of the switch unit when receiving the saturation interrupting signal, and restoring to the prior operation condition of the device when receiving the saturation restoring signal.