Patent ID: 7739700

Claim:
An insertion-proof device in an optical disk drive having an entrance, wherein the insertion-proof device comprises: a slider for driving a disc to be loaded or unloaded, wherein a push head is disposed at one end of the slider near the entrance; and a protection unit, comprising: at least one supporting arm extended from the protection unit and rotatably fixed near the entrance, wherein a limiting protrusion is disposed at a back end of the supporting arm and below a route of insertion of the disc, and wherein when the disc is tiltedly inserted to the optical disk drive, the limiting protrusion obstructs a front edge of the disc; and a protrusion extended from the protection unit and disposed on a moving path of the slider, wherein when the optical disk drive loads the disc, the push head pushes the protrusion so that the protection unit turns upward to cover part of the entrance to prevent other discs from being inserted to the optical disk drive.