Browse Prior Art Database

Redundant Contact for High Density Surface Connector

IP.com Disclosure Number: IPCOM000102469D
Original Publication Date: 1990-Nov-01
Included in the Prior Art Database: 2005-Mar-17
Document File: 2 page(s) / 38K

Publishing Venue

IBM

Related People

Chang, JP: AUTHOR [+2]

Abstract

Disclosed is a design to provide redundant contact points with sufficient contact forces. Mechanically, the weakness of fine pitch connector design is typically low contact forces with single point contacts. This invention uses an enforcer strip on a W-shaped contact spring to improve the connector performance as shown in the figure.

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Redundant Contact for High Density Surface Connector

       Disclosed is a design to provide redundant contact points
with sufficient contact forces.  Mechanically, the weakness of fine
pitch connector design is typically low contact forces with single
point contacts.  This invention uses an enforcer strip on a W-shaped
contact spring to improve the connector performance as shown in the
figure.

      Problems of fine pitch connectors are usually low contact
forces, limited wiping action, and lack of redundant contacts.  The
smallness of the spring design that is necessary for fine pitch
connectors makes high contact force difficult to achieve without
overstressing the spring.  This invention will solve these problems.

      A double-bend spring 2 design is positioned over contact tabs 4
on a card 6.  Enforcer strip E is then actuated to generate a
downward movement on the mid point of W-shaped springs on each side.
Contact points A and B will then move in the direction shown in the
figure to generate contact wipes.  Contact forces under A and B will
increase to acceptable level without overstressing the contact
springs.