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High Preload Buckling Beam Contact for Mezzanine Connector

IP.com Disclosure Number: IPCOM000112665D
Original Publication Date: 1994-Jun-01
Included in the Prior Art Database: 2005-Mar-27
Document File: 2 page(s) / 61K

Publishing Venue

IBM

Related People

Campbell, JS: AUTHOR [+2]

Abstract

Present patented IBM buckling beam contacts require a movable housing design to accommodate the bowing that occurs during compression of the contact. When the contact is compressed it exerts a force on the connector housing which if not relieved by allowing the housing to move, would cause sliding at the contact interface, damaging dendrite plating typically used in such a connector application. The disclosed invention is a mezzanine style connector which has a highly preloaded buckling beam contact. The high preloading reduces the amount of housing movement required.

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High Preload Buckling Beam Contact for Mezzanine Connector

      Present patented IBM buckling beam contacts require a movable
housing design to accommodate the bowing that occurs during
compression of the contact.  When the contact is compressed it exerts
a force on the connector housing which if not relieved by allowing
the housing to move, would cause sliding at the contact interface,
damaging dendrite plating typically used in such a connector
application.  The disclosed invention is a mezzanine style connector
which has a highly preloaded buckling beam contact.  The high
preloading reduces the amount of housing movement required.

      The disclosed invention can be described in summary as a
buckling beam contact which is highly preloaded in its connector
housing.  During connector actuation, the high preloading creates a
geometric condition which reduces the movement of the housing due to
the buckling beam contact bowing.

      In Fig. 1, a previously disclosed buckling beam contact
mezzanine connector is shown.  Spring contact (1) is shown in its
free state, being a flat spring.  Also shown in Fig. 1, spring
contact (1) is shown preloaded in housig (2).  In Fig. 2., the same
connector shown in Fig. 1 is shown preloaded in housing 2.  In Fig.
2, the same connector shown in Fig. 1 is shown actuated, forming an
electrical connection between substrates (3) and (5).  Spring contact
(1) is compressed, the bowing of the spring causes housing (2) to
mo...