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Displacement Control for High Insertion Force Connectors in a BOOK Logic Package

IP.com Disclosure Number: IPCOM000122372D
Original Publication Date: 1991-Dec-01
Included in the Prior Art Database: 2005-Apr-04
Document File: 2 page(s) / 50K

Publishing Venue

IBM

Related People

Baska, DA: AUTHOR [+3]

Abstract

A cross-section view of the logic card and high density connector is shown in Fig. 1. As originally conceived, the logic card (C) was supported within the book casting (D) by 2 stand-offs. Forces generated from the insertion of connector (F) into backplane assembly (A) caused the logic card to retract into the book assembly and rotate clockwise around the point where the connector support (E) joined with the logic card. This displacement of the connector is illustrated in Fig. 2. The combination of rotational and lateral displacement of the connector (F) would not allow electrical contact to occur between the backplane assembly (A) and connector (F).

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This is the abbreviated version, containing approximately 98% of the total text.

Displacement Control for High Insertion Force Connectors in a BOOK
Logic Package

      A cross-section view of the logic card and high density
connector is shown in Fig. 1.  As originally conceived, the logic
card (C) was supported within the book casting (D) by 2 stand-offs.
Forces generated from the insertion of connector (F) into backplane
assembly (A) caused the logic card to retract into the book assembly
and rotate clockwise around the point where the connector support (E)
joined with the logic card.  This displacement of the connector is
illustrated in Fig. 2.  The combination of rotational and lateral
displacement of the connector (F) would not allow electrical contact
to occur between the backplane assembly (A) and connector (F).

      A retaining rib (G) was added to the connector support (E) and
features (H) were formed in the book casting (D) to capture and
provide support to this rib.  With this feature added, as shown in
Fig.  3, the forces generated from insertion are transferred from the
connector (F) to the connector support (E) and then to the book
casting (D) through the retaining rib (G) and rib support (H).
Rotation of the connector is minimized by the retaining rib (G) and
casting features (H) providing support opposing the direction of the
insertion forces.  Minimizing the amount of connector rotation holds
the connector in alignment with the backplane assembly.  This
alignment eliminates any increase of insertion force caused by
rotat...