Browse Prior Art Database

Buckling Beam Mezzanine Connector with Two Piece Moveable Housing

IP.com Disclosure Number: IPCOM000113794D
Original Publication Date: 1994-Oct-01
Included in the Prior Art Database: 2005-Mar-27
Document File: 8 page(s) / 238K

Publishing Venue

IBM

Related People

Campbell, JS: AUTHOR [+2]

Abstract

One known type of buckling beam contacts requires a floating housing design to accommodate the deformation 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 float, would cause sliding at the contact interface, damaging dendrite plating typically used in such a connector application and mis-registering the contact. The disclosed invention is a buckling beam mezzanine connector which has a two piece housing, each piece moves relative to the other. Unlike the above design, the disclosed invention has housings with relieved centers, eliminating forces which require such a known design to have floating housings.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 45% of the total text.

Buckling Beam Mezzanine Connector with Two Piece Moveable Housing

      One known type of buckling beam contacts requires a floating
housing design to accommodate the deformation 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 float, would cause
sliding at the contact interface, damaging dendrite plating typically
used in such a connector application and mis-registering the contact.
The disclosed invention is a buckling beam mezzanine connector which
has a two piece housing, each piece moves relative to the other.
Unlike the above design, the disclosed invention has housings with
relieved centers, eliminating forces which require such a known
design to have floating housings.

      Also, the above known design has contacts with protruding tips,
these delicate contact tips can easily be damaged by normal handling.
The disclosed invention's contact tips are recessed in the housings
to prevent handling damage, since each part of the two piece housing
can move relative to the other, the contact tips always stay recessed
and protected from handling damage.

      Also, the protruding contact tips in the known design add more
tolerance accumulation to contact registration since they protrude at
an angle.  The disclosed invention has no protruding contacts, and
therefore better registration of the contact tips, thus allowing the
development of tighter contact grids than the known design.

      The disclosed invention can be described in summary as a
buckling beam mezzanine connector with a spring loaded two piece
movable housing.  The contact tips are recessed in the housing and
each piece of the housing moves with each respective contact tip as
the connector is actuated.  Short non-functional contact springs at
each end of the contact strips act as return springs, returning each
housing piece to their original position on connector de-actuation.
The housing is relieved in its center to prevent any significant
forces from the contact spring to act on the housing during connector
actuation.

      In Fig. 1, depicted is the previously known buckling beam
mezzanine connector design.  Note the spring contact (1) protrudes
significantly from housing (2), exposing it to possible handling
damage.  In Fig. 2, the previously disclosed design is shown in its
actuated state.  Note that the spring (1) contacts the housing (2)
significantly, with a force large enough that it must be relieved by
allowing housing (2) to move in the direction indicated perpendicular
to the connector compression direction, this is referred to as a
floating housing design.

      The disclosed invention is depicted in Fig. 3 in the
uncompressed state (de-actuated).  Note that the contact tip does not
protrude beyond either the lower housing (8) or the upper housing
(7).  Also make note of the dimension "A", which will be reduced when
the connector is actuat...