Browse Prior Art Database

Card Detents for Zero-Insertion-Force Connectors

IP.com Disclosure Number: IPCOM000035017D
Original Publication Date: 1989-May-01
Included in the Prior Art Database: 2005-Jan-28
Document File: 2 page(s) / 42K

Publishing Venue

IBM

Related People

Babuka, RT: AUTHOR [+3]

Abstract

Circuit cards can be resiliently biased toward a seated position in a zero insertion force (ZIF) connector by a spring that is subsequently located in an ineffective position and reset during card removal. In the side view, shown in Fig. 1, card 1 is inserted along slot 2, cf. arrow A, of connector 3 over retention spring 4. As the card becomes fully seated (phantom position) at the right, spring 4 moves up to hold the card in position while the connector handle 5 is operated in a clockwise (CW) direction to close the connector spring contacts (not shown) on the card contacts (not shown). For card removal, handle 5 is rotated counterclockwise (CCW) and to the downward position shown in Fig. 1 urging spring 4 down with pin 6 to allow card 1 to be withdrawn to the left.

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Card Detents for Zero-Insertion-Force Connectors

Circuit cards can be resiliently biased toward a seated position in a zero insertion force (ZIF) connector by a spring that is subsequently located in an ineffective position and reset during card removal. In the side view, shown in Fig. 1, card 1 is inserted along slot 2, cf. arrow A, of connector 3 over retention spring
4. As the card becomes fully seated (phantom position) at the right, spring 4 moves up to hold the card in position while the connector handle 5 is operated in a clockwise (CW) direction to close the connector spring contacts (not shown) on the card contacts (not shown). For card removal, handle 5 is rotated counterclockwise (CCW) and to the downward position shown in Fig. 1 urging spring 4 down with pin 6 to allow card 1 to be withdrawn to the left. Connector 3 may optionally be fitted with a plunger 7 and ejection spring 8 at its right end to aid in removal. As an alternative, spring 4 can be locked in an ineffective position as shown in the top view, Fig. 2, by providing detent spring 9 secured at end 10 to connector 3. When handle 5 is depressed, spring 4 moves down and detent 9 moves over spring 4 holding spring 4 down and permitting withdrawal of the card
1. As card 1 engages sloping surface 11 of the detent 9, the detent is forced from its locking position over spring 4, allowing spring 4 to move upward after the card is removed. In a different arrangement, as shown in the top view, Fig. 3,...