Printed Circuit Card Hold-Down Mechanism
Original Publication Date: 1985-Mar-01
Included in the Prior Art Database: 2005-Feb-18
A technique is described whereby a printed circuit hold-down mechanism is used to retain printed circuit cards in the appropriate sockets without the need to apply compression from the top, thereby eliminating card guides. The hold-down mechanism, as shown in Fig. 1, consists of a necked down rod 10 which has a cam 11 at one end of the rod to provide longitudinal direction when the rod is rotated. The printed circuit card 12, as shown in Fig. 2, has a key slot 13 which is positioned at notches 14 of the rod when printed circuit card 12 is inserted onto rod 10. A slight taper 15 guides the rod to mate with the card. Fig. 3 shows the printed circuit card 12 in position on rod 10. When rod 10 is rotated, it moves longitudinally to retain the card in its installed position.