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Self-Energizing Retention Mechanism for Zero-Insertion-Force Con- Nectors

IP.com Disclosure Number: IPCOM000038873D
Original Publication Date: 1987-Mar-01
Included in the Prior Art Database: 2005-Feb-01
Document File: 2 page(s) / 42K

Publishing Venue

IBM

Related People

Petrozello, JR: AUTHOR

Abstract

A spring-biased rotatable disk functions as a self-energizing retention mechanism for retaining an edge-type printed circuit card in a zero-insertion-force (ZIF) connector. The mechanism is actuated by the card itself or by an associated manually operated lever. (Image Omitted) Referring to Fig. 1 of the drawings, a rotatable disk 1 is mounted so that as a card 2 is inserted in the connector 3, an actuating pin 4, mounted on the card, engages disc 1 and rotates it about pivot 8, until the spring 5 passes the center position and causes the disk 1 to move to its retention position 6. This action is automatic during card insertion and applies a constant seating force to the card, accurately positioning it to the locating pin 7 in the connector. A force of 2.

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Self-Energizing Retention Mechanism for Zero-Insertion-Force Con- Nectors

A spring-biased rotatable disk functions as a self-energizing retention mechanism for retaining an edge-type printed circuit card in a zero-insertion- force (ZIF) connector. The mechanism is actuated by the card itself or by an associated manually operated lever.

(Image Omitted)

Referring to Fig. 1 of the drawings, a rotatable disk 1 is mounted so that as a card 2 is inserted in the connector 3, an actuating pin 4, mounted on the card, engages disc 1 and rotates it about pivot 8, until the spring 5 passes the center position and causes the disk 1 to move to its retention position 6. This action is automatic during card insertion and applies a constant seating force to the card, accurately positioning it to the locating pin 7 in the connector. A force of 2.5 to 5 pounds is applied by the disc to the card, which is the force required to overcome the ZIF connector spring-wiping action. The design of rotating disk 1 is such that the actuation pin 4 trips the mechanism just before the card 2 is fully inserted, allowing the retention portion of the disk to drive the card to its retained position. This is accomplished by the design and placement of the energizing spring 5 which is to the right of the disk center during an empty connector situation and shifts to the left of the disc center to rotate the disk when activated by an inserted card. Removal of a card causes a reverse rotation of disk 1, as indicated in Fig. 2, and resets the disk for the next card insertion by cau...