Browse Prior Art Database

High-Density Flexible Circuit Connector

IP.com Disclosure Number: IPCOM000102046D
Original Publication Date: 1990-Oct-01
Included in the Prior Art Database: 2005-Mar-17
Document File: 4 page(s) / 115K

Publishing Venue

IBM

Related People

Baumberger, JG: AUTHOR [+4]

Abstract

The disclosed invention is a flexible circuit connector which provides an interconnection between circuit boards and cards utilizing a flexible circuit.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 52% of the total text.

High-Density Flexible Circuit Connector

       The disclosed invention is a flexible circuit connector
which provides an interconnection between circuit boards and cards
utilizing a flexible circuit.

      Unique advantages of the disclosed invention over prior art
include:  1) inexpensively providing adequate contact force over all
the electrical connections, and 2) inexpensively aligning the
flexible circuit to the mating card in a precise manner.

      The connector is a zero-insertion-force type; it is shown in
Fig.  1 in the unactuated position and in Fig. 2 in the actuated
position.

      The contact force is evenly maintained along the connector
length by a compliant pressure foot 11 and an optimized wave spring 4
(Fig.  2).  In Fig. 3, the wave spring 4 contacts the back of the
pressure foot 11 at evenly spaced intervals.  At each point of
contact the pressure foot 11 is notched (see Fig. 3) to allow free
bending of the pressure foot 11, which accommodates any small bowing
of the mating surface over the connector length caused by connector
contact forces or manufacture of the mating surface itself. Also as
seen in Fig. 3, the end points of contact between the wave spring 4
and the wedge 5 have been moved toward the spring ends to compensate
for the end conditions of the wave spring 4 and pressure foot 11,
thus producing a uniform contact force distribution over the length
of the connector. In an alternate spring design (see Fig. 4),
cylindrical elastomeric springs 12 of varying diameter are optimally
spaced along the pressure foot 11.  Due to the unconstrained ends of
the pressure foot 11, the elastomer springs of varying diameter allow
the face of the pressure foot 11 to exert a d...