Patent ID: 6817020
Filing Date: 2004-11-09
Classification: G11B

Abstract:
An ejection structure for an optical disk drive having a tray, the ejection structure disposed on the back surface of the tray to eject the tray, comprising:a base; a motor disposed on the base; a worm gear connected to the motor; a limit switch disposed on the base; a main gear disposed on the base and engaged with the worm gear, the main gear having a first protruding pin; a first pushing arm disposed on the main gear and having a first through groove and a through hole; a second protruding pin disposed on the base and fitting in the through hole of the first pushing arm; a twisting spring fitted on the second protruding pin and disposed between the first pushing arm and the base providing resilient force to the first pushing arm; a third protruding pin disposed on the base; a second pushing arm disposed on the first pushing arm and having a second through groove and an engaging pin, wherein the first protruding pin and the third protruding pin fit in the second through groove, and the engaging pin fits in the first through groove of the first pushing arm; whereby, when the motor drives the worm gear, the worm gear drives the main gear to rotate, so that the first pushing arm and the second pushing arm rotate and move relatively to eject the tray; and whereby, when the first pushing arm is pushed from the outside of the tray, the first pushing arm drives the second pushing arm to move linearly to eject the tray.