Expansion device for built-in hard disk

An expansion device for a built-in hard disk, comprising:

• a bottom plate, wherein the bottom plate is provided with a connecting position and a mounting screw for connecting the bottom plate to a photographic device using the mounting screw;
• a grip, a mounting slot is provided in the grip, a positioning pin is provided in the mounting slot;
• and
• an expansion assembly connected to the bottom plate, the expansion assembly and the mounting screw extending from the bottom plate toward a same direction,
• wherein the bottom plate is connected to a bottom side of the expansion assembly,
• wherein the expansion assembly comprises a hard disk mounting plate,
• wherein the hard disk mounting plate comprises a hard disk interface, and an external interface for connecting to the photographic device mounted on the connecting position, the external interface adapted to connect to a memory card slot of the photographic device,
• wherein the expansion assembly is configured to detachably receive a hard disk in the expansion assembly, and the hard disk is connected to the hard disk interface,
• wherein one side of the grip is provided with a first cooling hole penetrating into the mounting slot, and one side of the hard disk mounting plate corresponding to the first cooling hole is provided with a first thermally conductive rubber pad,
• wherein the other side of the grip is detachably provided with a cooling fin for covering the mounting slot, a protrusion hole is formed between a side edge of the cooling fin and the other side of the grip, and the external interface protrudes out of the grip through the protrusion hole, and
• wherein the cooling fin is provided with a second cooling hole, and one side of the hard disk corresponding to the cooling fin is provided with a second thermally conductive rubber pad.