Patent ID: 7885159

Claim:
An optical disc drive device with an anti-scraping mechanism, comprising: a micro processor used to store and execute instructions, parameters and programs; an optical read/write device used to read/write an optical disc; an anti-scraping module provided for said micro processor to execute an anti-scraping operation process, wherein said anti-scraping module comprises: focusing means for making said optical read/write device from an initial position move to a focal position to let the laser light emitted from said optical read/write device focus on the read/write surface of said optical disc; detecting means for detecting the relationship between said focal position and said initial position; setting means for setting a vertical movement boundary in a vertical direction for said optical read/write device, wherein said vertical direction is perpendicular to said read/write surface; memorizing means for saving said vertical movement boundary; and stopping means for stopping the motion of said optical read/write device immediately when said optical read/write device is moving out said vertical movement boundary; a servo motor used to drive said optical read/write device to move; and a photodetector used to detect the focusing condition of said optical read/write device.