Slim optical disk drive capable of reducing noise of signals

#1. Field of the Invention

#The present invention relates to an optical disk drive, and more specifically, to a slim optical disk drive utilizing a tray to carry a disc to slide in or slide out of an opening, so as to change the disc for reading or writing.

#2. Description of the Prior Art

#FIG. 1 is a cross-sectional diagram of a conventional slim optical disk drive.

#FIG. 2 is a local enlargement diagram of area A as shown in FIG. 1.

#FIG. 3 is a perspective diagram of a slim optical disk drive according to a first embodiment of the present invention.

#In the following detailed description of the preferred embodiments, reference is made to the accompanying drawings which form a part hereof, and in which is shown by way of illustration specific embodiments in which the invention may be practiced. In this regard, directional terminology, such as “top,” “bottom,” “front,” “back,” etc., is used with reference to the orientation of the figure(s) being described.

#Please refer to FIG. 2. FIG. 2 is a partial enlargement diagram of area A as shown in FIG. 1. The noise of signals generated in the flexible cable 8 is analyzed as below. The lower housing 2 and the protection plate 9 are made of metal material. The lower housing 2 and the protection plate 9 get close due to thickness limitation of the slim optical disk drive 1, and currents pass through the flexible cable 8. It's very easy to generate induction which gathers charges of unlike poles on the lower housing 2 and the protection plate 9, so as to generate effect of capacity between the lower housing 2 and the protection plate 9. When induction generated by effect of capacity gets stronger, interference to signals in the flexible cable 8 gets harder, especially for a SATA optical disk drive.

#Effect of capacity is strongest in the curved area 11 of the flexible cable 8 due to a hairpin turn of currents and electromagnetic changing extremely in the curved area 11, so as to generate interference to signals in the flexible cable 8 and make the slim optical disk drive 1 unsteady. A FPC is high cost due to precise manufacturing processes, although utilizing a FPC is capable of decreasing stack height to reduce effect of capacity according to configuration requirement of an optical disk drive. Therefore, a FFC is adopted recently in an optical disk drive due to its low cost. However, a FFC is thick and needs to be stacked up in turning directions, so as to easily generate interference to signals in a FFC. Besides, thickness of an optical disk drive gets smaller, and the lower housing 2 and the protection plate 9 get closer, so as to enhance effect of capacity due to squeezing the flexible cable 8.