Abstract: A releasing device for releasing the hard disk drive is provided. The releasing device includes a housing, a first releasing component, a second releasing component and a third releasing component. The housing is used to contain the hard disk drive therein. The first releasing component is mounted on the housing and having a first front end and a first back end. The second releasing component has a second front end, a second back end and a fixed point fixed to the housing, wherein the second front end is connected to the first back end of the first releasing component, the fixed point mounted between the second front end and the second back end for serving as a pivoting center, and the second front end revolves around the pivoting center while the first releasing component is moved.

Abstract: An entertainment system and a detachable display apparatus thereof are provided. Since the detachable display apparatus may be freely engaged and disengaged with a specific member in the entertainment system, the entertainment system may achieve more purposes and video/audio data stored in the entertainment system may be updated, accessed and played at a remote area.