Browse Prior Art Database

Card Edge Connector Card Retainer

IP.com Disclosure Number: IPCOM000115416D
Original Publication Date: 1995-Apr-01
Included in the Prior Art Database: 2005-Mar-30
Document File: 1 page(s) / 39K

Publishing Venue

IBM

Related People

Rice, JL: AUTHOR

Abstract

Disclosed is a solution to the problem of providing card retention for free standing card. 50 mil center card edge connectors Micro Channel* are currently used not only as for feature cards (in which case the cards are retained in place by the mechanical structure of the chassis) but for cache and upgrade cards. In these cases the cards are essentially "free standing" in the chassis. The connector provides retention in the horizontal direction, but only the retention force of the connector contacts on the card edge serves to hold the card place during mechanical shock. It would be desirable to have a card retention feature that did not involve changing the connector (and so increasing its cost) or adding mechanical structures on the chassis.

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This is the abbreviated version, containing approximately 82% of the total text.

Card Edge Connector Card Retainer

      Disclosed is a solution to the problem of providing card
retention for free standing card.  50 mil center card edge connectors
Micro Channel* are currently used not only as for feature cards (in
which case the cards are retained in place by the mechanical
structure of the chassis) but for cache and upgrade cards.  In these
cases the cards are essentially "free standing" in the chassis.  The
connector provides retention in the horizontal direction, but only
the retention force of the connector contacts on the card edge serves
to hold the card place during mechanical shock.  It would be
desirable to have a card retention feature that did not involve
changing the connector (and so increasing its cost) or adding
mechanical structures on the chassis.

      The retention feature consists of two parts.  The first part is
a piece of Mylar, which is stamped out to the footprint of the
connector (Fig. 1).  This fits over the connector solder tails and
standoffs and is thus sandwiched between the connector and the
printed circuit board when the connector is mounted on the board.
The ends of the Mylar piece, which protrude beyond the connector
body, are shaped such that they can be inserted into slots in the
elastomeric retainer, the second piece of the card retention feature.
The elastomeric retainer is a straight piece of elastic with a slit
at each end (Fig. 2).  In use the tongue of the Mylar piece is
inserted into one end oth...