Abstract: An external hard disk box having a cover-lifting means includes a hollow base and a cover. The cover is pivotally connected to the base in a liftable and closable manner. The cover is provided with a hard disk accommodating portion for accommodating a hard disk. When the cover is lifted, the hard disk is elevated along with the cover, so that the user can take out the hard disk easily. When the cover is covered, the cover is locked onto the base. Via this arrangement, it is convenient and labor-saving for the user to mount or detach the hard disk.

Abstract: A heat-dissipating structure having an external fan includes a casing, a connecting piece and a heat-dissipating fan. The casing is provided with a plurality of heat-dissipating holes. The connecting piece is provided outside the casing. The heat-dissipating fan is assembled on the connecting piece to correspond to the positions of the heat-dissipating holes. An accommodating space is formed between the heat-dissipating fan and the casing. Via this arrangement, the heat-dissipating fan can be provided outside the casing to cooperate with the heat-dissipating holes, thereby dissipating the heat within the casing quickly.

Abstract: An external hard disk box is used for installing a hard disk. On the bottom and on two sides of the hard disk, there is a first fastening hole and a second fastening hole. The external hard disk box includes a lower cover, an upper cover, and two positioning structures. The lower cover has a receiving space. On the bottom surface of the receiving space, there is a first positioning portion that corresponds to the first fastening hole. The upper cover covers the lower cover. The two positioning structures are respectively located on two sides of the receiving space. Each positioning structure has a second positioning portion that corresponds to the second fastening hole of the hard disk. By using the first positioning portion and the second positioning portion, the hard disk is firmly positioned in the hard disk box. Screws are not needed.

Abstract: A fastening device includes an assembling portion, a fastener, at least one flexible element, and a key. The assembling portion has an operational hole, a first plugging hole, a through hole, and a second plugging hole. The fastener is located on the outside surface of the assembling portion, and includes an opening hole that corresponds to the operational hole, at least one first flexible arm is positioned in the first plugging hole, at least one second flexible arm is positioned in the second plugging hole, and at least one short rod passes through the through hole. The flexible element is located between the assembling portion and the fastener. The key is located on the outside surface of the fastener and extends into the operational hole for controlling the relative movement between the fastener and the assembling portion so that the short rod fastens or withdraws the object.