Retaining device for expansion cards

A computer enclosure comprising:

• a plurality of expansion card sockets for receiving a plurality of expansion cards, each of the expansion cards having a slot cover;
• a main plate having an expansion card seat for securing the slot covers thereon, the expansion card seat comprising a pair of locking means;
• and
• a retaining device comprising:
• a pair of locking members respectively fixed on the expansion card seat, each of the locking members comprising a resilient arm and a locking body at an end of the resilient arm;
• and
• a fastener pivotably attached to the expansion card seat;
• the fastener comprising a pressing plate for pressing the slot covers against the expansion card seat, a pair of locking arms engaging with the locking bodies, and a pair of pushing arms for pushing the resilient arms;
• wherein the pushing arms are capable of pushing the resilient arms to cause the locking bodies to engage with the locking means of the expansion card seat, thereby allowing the locking arms to disengage from the locking bodies and the pressing plate to be released from the slot covers of the expansion cards.

A computer enclosure assembly comprising:

• an expansion card seat structure defining a plurality of expansion card slots extending therethrough in a front-to-back direction, and a top support plate extending along a lengthwise direction perpendicular to said front-to-back direction above said expansion card slots;
• at least one locking member moveably mounted to the expansion card seat structure;
• a fastener mounted to the expansion card seat structure and pivotal relative to said expansion card seat structure about an axis extending along said lengthwise direction;
• and
• at least one expansion card with a slot cover being mounted to the expansion card seat structure;
• wherein
• when said fastener is located in a horizontal position and locked with the locking member which is in a first position, the fastener cooperates with the top support plate to retainably sandwich the slot cover therebetween;
• when a portion of said fastener is downwardly deflected, the locking member is forced to move from the first position to a second position and temporarily held by the expansion card seat structure at said second position so as to allow the fastener to be disengaged from the locking member and successively further upwardly rotated to an upper position above said horizontal position, where the fastener no longer cooperates with the top support plate to retainably sandwich the slot cover therebetween, under a condition that the locking member is automatically transformed from the second position back to the first position during upward rotation of the fastener for next time locking usage.