Browse Prior Art Database

Wiping Zero Insertion Force Sockets

IP.com Disclosure Number: IPCOM000036546D
Original Publication Date: 1989-Oct-01
Included in the Prior Art Database: 2005-Jan-29
Document File: 2 page(s) / 62K

Publishing Venue

IBM

Related People

Swindal, WN: AUTHOR

Abstract

This article describes a socket device which utilizes the rotational effect of an eccentric cam to wipe and then mate two conductive surfaces. The eccentricity of the cam controls the amount of wipe.

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Wiping Zero Insertion Force Sockets

This article describes a socket device which utilizes the rotational effect of an eccentric cam to wipe and then mate two conductive surfaces. The eccentricity of the cam controls the amount of wipe.

Fig. 1 is a cross-section view of the wiping zero insertion force (ZIP) socket. One eccentric cam is required for each contact card

(Image Omitted)

surface A with the rotation force tending to pull the card into the socket housing. The center lines of the cam are supported by the socket housing body. The eccentric cam is used to provide electrical connection between the card surface A and electrical conductors C connected to external socket conductors D. A flexible media carries the electrical conductors supported by an elastomer E and minimizes molding tolerance requirements.

Figs. 2A, 2B and 2C show the construction of the eccentric cam in an end and top view. The cam is constructed using a knurled metal core shaft H to evenly distribute the rotational forces over the length of the cam. A knurled surface J will minimize slippage. This knurled rod is covered with an eccentric rubberized coating K that will maintain the appropriate hardness over its useful life. This surface is covered with a flexible media with etched metal conductors L aligned perpendicular to the axis of the cam. Several suitable flexible media exist, such as an etched copper-clad flexible media plated with nickel and gold. The conductive rings L are not required to circumnavigate the cam but only connect...