Configuration Selection, Modeling, and Preliminary Testing in Support of Constant Force Electrical Connectors

[+] Author and Article Information
Brent L. Weight

Mechanical Eng. Department, Brigham Young University, Provo, Utah 84602bweight@et.byu.edu

Christopher A. Mattson

 ATL Technology, Springville, UT 84663mattson@atlconnect.com

Spencer P. Magleby

Mechanical Eng. Department, Brigham Young University, Provo, UT 84602magleby@byu.edu

Larry L. Howell

Mechanical Eng. Department, Brigham Young University, Provo, UT 84602lhowell@et.byu.edu

J. Electron. Packag 129(3), 236-246 (Jul 25, 2006) (11 pages) doi:10.1115/1.2721080 History: Received March 21, 2005; Revised July 25, 2006

The recent introduction and advancements in design of simple, constant-force mechanisms have created the potential for small-scale, low-cost, constant-force electronic connectors (CFECs). CFECs differ from traditional connectors by the separation or disassociation of contact normal force and contact deflection. By removing the traditional constraints imposed by forces and deflections that are dependent on each other, new types of electronic connectors can be explored. These new designs may lead to smaller and more reliable electronic connectors. In this paper, constant-force mechanisms are adapted to satisfy current industry practices for the design of electronic connectors. Different CFEC configurations are explored and one is selected, prototyped, and used as a proof-of-concept connector for a personal digital assistant (PDA) docking station. The modeling, optimization, and verification of the prototype CFEC is presented. Adaptation of constant-force technology to electronic connectors creates new possibilities in electronic connector designs, including allowing an optimal contact force to be utilized to decrease the effects of fretting and wear, lowering required manufacturing tolerances, reducing the system’s sensitivity to variations introduced by the user, and increasing the system’s robustness in applications where movement or vibrations exist.

Copyright © 2007 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.



Grahic Jump Location
Figure 1

Effect of load on adhesive wear rates

Grahic Jump Location
Figure 2

Depiction of optimal force zone

Grahic Jump Location
Figure 3

Force versus displacement curves for a CFEC and a cantilever beam type contact of similar design

Grahic Jump Location
Figure 4

(a) Pogo-type connector and (b) cantilever-type connector

Grahic Jump Location
Figure 5

General compression slider-crank constant-force mechanism

Grahic Jump Location
Figure 6

Simulation of pin joints with a circular cam

Grahic Jump Location
Figure 7

The above subfigures each illustrate a potential challenge (described in the title) to the simulated pin joint method. Design approaches to address the challenges are described in the subfigure.

Grahic Jump Location
Figure 8

Selected constant-force electronic connector configuration

Grahic Jump Location
Figure 9

Selected CFEC configuration in PDA dock

Grahic Jump Location
Figure 10

Important parameters for the selected CFEC configuration

Grahic Jump Location
Figure 11

Key points for the finite element model

Grahic Jump Location
Figure 12

CFEC proof-of-concept design

Grahic Jump Location
Figure 13

CFEC prototype as compared to a dime

Grahic Jump Location
Figure 14

Schematic of test setup

Grahic Jump Location
Figure 15

Graph of force versus displacement from test data

Grahic Jump Location
Figure 16

Graph of force versus displacement during compression and expansion strokes

Grahic Jump Location
Figure 17

Average and predicted force comparison for two different cam materials



Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In