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Zero Insertion Force Connector With Beam Inserted Into Tube and Moved Laterally to Contact Tube at Inside Wall and Rim

IP.com Disclosure Number: IPCOM000040482D
Original Publication Date: 1987-Nov-01
Included in the Prior Art Database: 2005-Feb-02
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Johnson, RA: AUTHOR

Abstract

A circuit board has an electrical contact in the form of a tube that is set into the board. The board carries an array of tubes. A circuit card that is to be plugged into the board has pin-like bendable beams that fit loosely into a matching tube when the card is initially positioned on the board. The card grips the beam at a point that is spaced from the rim of the tube, and when the card (or the board) is moved laterally, the rim of the tube strikes the beam at a point midway between the free end of the beam and the point where the beam is gripped by the card. This initial motion establishes a first point of electrical contact between the midpoint of the beam and the rim of the tube.

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Zero Insertion Force Connector With Beam Inserted Into Tube and Moved Laterally to Contact Tube at Inside Wall and Rim

A circuit board has an electrical contact in the form of a tube that is set into the board. The board carries an array of tubes. A circuit card that is to be plugged into the board has pin-like bendable beams that fit loosely into a matching tube when the card is initially positioned on the board. The card grips the beam at a point that is spaced from the rim of the tube, and when the card (or the board) is moved laterally, the rim of the tube strikes the beam at a point midway between the free end of the beam and the point where the beam is gripped by the card. This initial motion establishes a first point of electrical contact between the midpoint of the beam and the rim of the tube. As the lateral motion is continued, the beam wipes the tube as it is being bent until its free end strikes the inside wall of the tube and electrical contact is made at a second point. In one embodiment, a guide holds the cards for lateral movement and spaces the card edges away from the tube rims. In another embodiment, the tubes are mounted in the edges of a stack of cards that are to be mounted on opposite sides of a board. The beams are carried by the board and project from opposite sides of the board. The board is moved to make contact. The board can carry internal wiring that interconnects the beams, or the beams can passively carry power and signals for inte...