Browse Prior Art Database

Zero Insertion Force Connector

IP.com Disclosure Number: IPCOM000043760D
Original Publication Date: 1984-Sep-01
Included in the Prior Art Database: 2005-Feb-05
Document File: 2 page(s) / 85K

Publishing Venue

IBM

Related People

Bauman, AH: AUTHOR [+3]

Abstract

Reference is made to two earlier published articles [1,2] which describe zero insertion force electrical connectors and the mechanisms used to obtain contact wiping action. A third technique is described herein whereby a high density right-angle card-to-board connector is provided to obtain a dust-tight, double-sided connection with contact wipe action and top or side entry capability. Again, using the zero insertion force (ZIF) concept, the present design uses closer pad-to-pad spacings 1, as shown in Fig. 1, for contact pads 2 on card 3. Fig. 2 shows the card 3 inserted and the connector beams 4 closed by the cam-actuating mechanism 5. Fig. 3 shows the beams 4 open and the card 3 removed. Fig. 4 shows the cam-actuating mechanism 5 in greater detail in the open position.

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Zero Insertion Force Connector

Reference is made to two earlier published articles [1,2] which describe zero insertion force electrical connectors and the mechanisms used to obtain contact wiping action. A third technique is described herein whereby a high density right-angle card-to-board connector is provided to obtain a dust-tight, double-sided connection with contact wipe action and top or side entry capability. Again, using the zero insertion force (ZIF) concept, the present design uses closer pad-to-pad spacings 1, as shown in Fig. 1, for contact pads 2 on card 3. Fig. 2 shows the card 3 inserted and the connector beams 4 closed by the cam-actuating mechanism 5. Fig. 3 shows the beams 4 open and the card 3 removed. Fig. 4 shows the cam-actuating mechanism 5 in greater detail in the open position. Elongated cylindrical elastomeric connector elements 6 of the kind described in 2 Ùprovide the electrical connections between the pads 2 on card 3 and the corresponding pads 7 on board 8. It should be noted that the contact density is a function of artwork and printed circuit technology and not mechanical parts and tooling. The contact force remains constant regardless of the number of input/output contact points. Conductive rings on the cylindrical surface of the elastomeric connector elements 6 provide multiple contact points for each pad, thereby providing added reliability. This connector assembly requires no force to be applied by the user to the card 3. Refer...