News Column

Patent Issued for Tray Locking Device for Optical Disc Drive

August 12, 2014

By a News Reporter-Staff News Editor at Journal of Technology -- A patent by the inventors Hsu, Cheng-Chung (Hsinchu, TW); Wu, Yung-Han (Hsinchu, TW); He, Sz-Shian (Hsinchu, TW); Tsao, Ming-Chun (Hsinchu, TW); Lee, In-Shuen (Hsinchu, TW), filed on August 6, 2012, was published online on July 29, 2014, according to news reporting originating from Alexandria, Virginia, by VerticalNews correspondents.

Patent number 8793711 is assigned to Lite-On Technology Corporation (Taipei, TW).

The following quote was obtained by the news editors from the background information supplied by the inventors: "The invention relates to an optical disc drive, and more particularly to a tray locking device for an optical disc drive.

"With the advancement of computer technology, data types that can be processed by computers are increased, and the required storage capacity is also correspondingly expanded. Since an optical disc has advantages of reasonable price, portability, large storage capacity, easy data preservation, and long duration of data preservation, and the optical disc may ensure data invulnerability, the optical disc has gradually replaced the conventional magnetic recording medium and becomes an indispensable optical storage medium in modern life. As the optical discs are extensively applied, optical disc drives used for reading data from the optical discs have become indispensable electronic products in daily life as well.

"Generally, an optical head is configured in an optical disc drive, and the optical head is driven by driving devices (e.g., lead screws) to move back and forth, so that the optical head is capable of reading data stored in the optical disc held by a tray. In addition to the driving devices (e.g., lead screws), a tray locking device is also required in the optical disc drive for locking the tray in the optical disc drive. When a disc ejecting command is issued, the tray is released and ejected from the optical disc drive, and thereby a user can easily place an optical disc onto the tray or remove an optical disc from the tray.

"In a conventional optical disc drive, an electromagnetic plunger or a motor is often applied to control the locking mechanism or the releasing mechanism of the tray. An excessive number of devices within the optical disc drive, however, significantly occupy the inner space of the optical disc drive, which is unfavorable to the miniaturization of the optical disc drive. Moreover, the manufacturing costs may be raised."

In addition to the background information obtained for this patent, VerticalNews journalists also obtained the inventors' summary information for this patent: "The invention is directed to a tray locking device adapted to an optical disc drive. The tray locking device may reduce the number of the devices within the optical disc drive as well as economize the inner space of the optical disc drive. Further, the tray locking device may be conducive to effective reduction of manufacturing costs.

"In an embodiment of the invention, a tray locking device adapted to an optical disc drive for locking and releasing a tray is provided. The optical disc drive has an optical head that is connected to and engaged with a lead screw. The optical head is driven and then moved by the lead screw. The tray locking device includes a pushing member driven to moved by the lead screw, a latching hook for locking and releasing a protruding pin, and a transmission assembly configured between the pushing member and the latching hook. The transmission assembly includes a first rod and a second rod that are movably configured in the tray. The first rod has a first driving portion, and the second rod has a second driving portion. When the transmission assembly is located at an initial position, the first driving portion is located on a moving path of the pushing member, while the second driving portion is not located on the moving path of the pushing member. When the tray is to be ejected, the lead screw drives the pushing member to push the first driving portion, such that the first rod drives the second rod to move, and that the second driving portion is moved to the moving path of the pushing member.

"Other features and advantages of the invention will be further understood from the further technological features disclosed by the embodiments of the invention wherein there are shown and described embodiments of this invention, simply by way of illustration of modes best suited to carry out the invention."

URL and more information on this patent, see: Hsu, Cheng-Chung; Wu, Yung-Han; He, Sz-Shian; Tsao, Ming-Chun; Lee, In-Shuen. Tray Locking Device for Optical Disc Drive. U.S. Patent Number 8793711, filed August 6, 2012, and published online on July 29, 2014. Patent URL:

Keywords for this news article include: Lite-On Technology Corporation.

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Source: Journal of Technology

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