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Printed Circuit Board Stacking Fastener System

IP.com Disclosure Number: IPCOM000040947D
Original Publication Date: 1987-Apr-01
Included in the Prior Art Database: 2005-Feb-02
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Carr, MP: AUTHOR

Abstract

A fastener system is used for mounting a plurality of high insertion force printed circuit boards (PCBs) in a stacked fashion one above the other. The fastener system includes means for positively seating and unseating the PCBs without using tools.

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Printed Circuit Board Stacking Fastener System

A fastener system is used for mounting a plurality of high insertion force printed circuit boards (PCBs) in a stacked fashion one above the other. The fastener system includes means for positively seating and unseating the PCBs without using tools.

The fastener system includes a pair of base fasteners 1 which mount to the lowest PCB 2 in the stacking arrangement. The base fasteners 1 are mounted through holes in the PCB 2 and held in place by a nut threaded on the protruding end of the fastener. The opposite end of the base fastener 1 is open and threaded internally to receive the threaded stud end of the stacking fastener 3 of the subsequent PCB 4 above it.

Each stacking fastener 3 is likewise mounted to the PCB 4 through a hole in the PCB, but it is held in place by a retaining ring 5 on the protruding stud end such that the stacking fastener 3 is freely rotatable about its vertical axis. The stud end of the stacking fastener 3 is tapered and the fasteners are located on the PCB near the ends of the connectors to facilitate assembly.

To seat one PCB on top of the other, the boards are lined up and the stud ends of the stacking fasteners 3 are threaded into the receptacle end to accommodate subsequent PCBs. The receptacle of the stacking fasteners 3 may be ribbed to provide tactile friction for hand turning. As the stacking fasteners 3 are screwed into the lower fasteners 1, the PCBs are drawn together, seating and...