Design for Manufacturability

CD-ROM Redesign

Dell Latitude CP CD-ROM Module, PN 89314

Redesign by:

Daniel Minnich
Halil S. Hamut
Rob Rudolf
Laura Fu

Winter 2005

The laptop CD-ROM drive is used extensively in daily life and is especially important for academic use in the undergraduate population of the University of Michigan. The assembly efficiency of the CD-ROM drive was increased by replacing all the screws with snap fits. This results in a lower manufacturing time and therefore lower cost. A compliant mechanism was designed to incorporate a new feature for the CD-ROM. Similar to the floppy disc design, this feature both visually and tactilely indicates to the user whether or not there is a CD in the drive, it also doubles as the ejection button when pushed. A simple latch pulls the compliant mechanism out of contact with the CD while it is in use. This redesign was developed by Daniel Minnich, Halil S.Hamut, Rob Rudolf, and Laura Fu in Winter 2005, instructors: Prof. Sridhar Kota, Mentor Dr. Donald Malen, and Teaching Assistant Audrey Plinta.

 

 

Project Specifications (pdf)

 

Pictorial Summary

1. Outer Casing Redesign:  incorporating snap-fit into the outer casing eliminates screw and screw boss, provides room for compliant mechanism

2. CD-Tray Facia Redesign:  incorporating snap-fits into the CD-Tray facia eliminates screws and simplifies assembly (no inversion step needed)

3. User Detection of CD: 
compliant mechanism design provides physical feedback to user when a CD is present in the drive

4. Simple Latch:

pulls the compliant mechanism out of contact with the CD while it is in use

 

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