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Guide Pin Stiffener Bar

IP.com Disclosure Number: IPCOM000111857D
Original Publication Date: 1994-Apr-01
Included in the Prior Art Database: 2005-Mar-26
Document File: 2 page(s) / 43K

Publishing Venue

IBM

Related People

Ashton, GL: AUTHOR [+2]

Abstract

To prevent printed circuit board deflection, due to card plugging forces, stiffener bars are commonly attached to the back of the printed circuit board. To achieve proper card connector to board connector alignment, guide pins are commonly attached to the front or connector side of the board by a fastener located on the back side of the board.

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This is the abbreviated version, containing approximately 100% of the total text.

Guide Pin Stiffener Bar

      To prevent printed circuit board deflection, due to card
plugging forces, stiffener bars are commonly attached to the back of
the printed circuit board.  To achieve proper card connector to board
connector alignment, guide pins are commonly attached to the front or
connector side of the board by a fastener located on the back side of
the board.

      By drilling and tapping holes in the stiffener bar (1) to match
the card connector positions, the guide pins (2) can be threaded onto
the bar as an assembly (Fig. 1).  With the guide pins passing through
clearance holes in the board (Fig. 2), the guide-pin bar assembly (3)
and the board (4) can be fastened down to the card enclosure.

      This approach provides board stiffening and card connector
guiding in a relatively small area on the back of the board.  This
approach also reduces assembly time.  Prior to this, the guide pins
would be assembled to the board one at a time.  This procedure
required working on both sides of the board to attach the guide pins,
possibly many times depending on the number of connectors vs.  simply
screwing the guide pins onto a single bar and assembling the bar to
the card enclosure.

The advantages of this approach are:

1.  Increased board area for electrical purposes.

2.  Easier assembly of guide pins.

3.  Less assembly time.

4.  Provides board stiffening.

5.  No fastener required to attach the guide pins, resulting in fewer
    parts.