Protection method for manual ejection operation of optical disk driver

A protection method for manual ejection operation of optical disk driver is proposed. The method sets the tray of the optical disk driver to a locked state when the optical disk driver is in normal rotation. The state of a load-sensing switch is on when the tray is in state of disk loading. When a manual ejection is triggered, the state of a load-sensing switch is off and a controller senses the off state. The controller applies a voltage to the tray motor and change the state of the load-sensing switch to on state. Therefore, the tray of an optical disk driver is set to a locked state.

DETAILED DESCRIPTION OF THE INVENTION FIG. 2 shows a perspective view of an optical disk driver for demonstrating the protection method for manual ejection operation of optical disk drive according to the present invention. The tray of the optical disk driver is driven by a tray motor 1 through a transmission mechanism composed of a gear 2 and rack 3 . The disk-loading state is detected by a load-sensing switch 4 . Moreover, the present invention provides a controller 5 to sense the on/off state of the load-sensing switch 4 and provides a voltage of specific level to the tray motor 1 . As shown in FIG. 3 , when the optical disk driver is normally operated and running, the disk tray of the optical disk driver is in load-locked state, i.e., the tray cannot be ejected by pressing the ejection button. At this time, the load-sensing switch 4 is in on position in step 20 . In the present invention, the load-sensing switch is used as judgment reference for the controller 5 . If the optical disk driver is normally operated and running, and the manual ejection function is triggered, i.e., the load-locked state is relieved, the load-sensing switch is changed to off position from on position in step 21 . The controller 5 detects the stage change of the load-sensing switch 4 and then applies a loading voltage to the tray motor 1 in step 22 . At this time, the load-sensing switch is changed to on position from off position, the tray is set to a locked state in step 23 . Therefore, the present invention can prevent the damage of optical disk driver and optical disk due to careless activating manual ejection when the optical disk driver is in high-speed running. Although the present invention has been described with reference to the preferred embodiment thereof, it will be understood that the invention is not limited to the details thereof. Various substitutions and modifications have suggested in the foregoing description, and other will occur to those of ordinary skill in the art. Therefore, all such substitutions and modifications are intended to be embraced within the scope of the invention as defined in the appended claims.