Patent ID: 7639507

Claim:
A control device used for a computer casing on which a plurality of expansion cards is inserted: a first frame and a second frame which are installed in a casing of height of 2 U; a connection element, a connection end of which is connected on the first frame, the other connection end of which is connected on the second frame, and which is in a vertical state; a right riser card, a board of which is welded with a plurality of slots, and which is connected on a right side of the connection element; a left riser card, a board of which is welded with a plurality of slots, and which is connected on a left side of the connection element; a set of plural expansion cards which is inserted horizontally into the plural slots of the right riser card; and a set of plural expansion cards which is inserted horizontally into the plural slots of the left riser card, wherein an inner board of the first frame is fixed respectively with a first hook, a second hook, and a third hook, with end parts of the first, second, and third hooks being provided respectively with locking slots; rear ends of the first, second, and third hooks being integrally extended with projection pieces for pressing by a human hand; rear ends of the second, third, and fourth expansion cards being connected respectively with a first, second, and third locking pieces; the first locking piece being locked into the locking slot of the first hook, the second locking piece being locked into the locking slot of the second hook, and the third locking piece being locked into the locking slot of the third hook.