Patent ID: 6404981
Filing Date: 2002-06-11
Classification: H04N

Abstract:
A portable data recording device for recording data on a disc-shaped recording medium, comprising:a disc drive for recording data on the disc-shaped recording medium with a head unit for recording data and a head actuator unit for positioning said head unit, said disc drive being provided inside a casing; a single acceleration sensor mounted to said casing for detecting an impact applied to said casing; and control means for controlling said disc drive for discontinuing data recording on said disc-shaped recording medium and for controlling said head actuator unit to start a re-seeking movement for moving said head unit to a starting position of a sector in which an impact is detected if the impact exceeding a pre-set value is detected based on detection results from said accelerator sensor, wherein said single acceleration sensor includes an impact detection plate molded substantially in the shape of a rectangular plate and is arranged so that the major surface of the impact detection plate is inclined at an angle of substantially 45Â° relative to three orthogonal axes, a first axis of the three orthogonal axes being along a direction parallel to a moving direction of said head unit, and a second axis being along a direction normal to the major surface of said disc-shaped recording medium that is disposed in said disc drive.