Electric Toothbrush RedesignHank Lin Jesse ShafferKuralay M.Yaqi Yang

09/30/2011

Outline Initial Problem Statement Customer needs assessment. Weighting of customer needs Revised problem statement External research Concept generation Final design Conclusion

Project Management Analysis of customer needs. -----Jesse, Hank External search for concept generation

Literature search------------------------------------------------Kuralay Patent searches----------------------------------------------------Jesse Benchmarking-----------------------------------Yaqi (Chart) Jesse Product dissection------------------------------------------------Hank

Revising the design statement------------------------- Hank, Jesse Internal work for concept generation-- Hank, Jesse, Kuralay Concept selection---- -------------------------Hank, Jesse, Kuralay Embodiment of the design and feasibility analysis------Jesse,

Hank, Kuralay Materials and manufacturing processes----------------Hank

Detail Design-------------------------------------Hank, Jesse, Kuralay

Customer Needs Chart

1. Quality of Function 1.1 Clean teeth thoroughly i. Combination of spinning and Straight moving bristles 1.2 Turn on and off smoothly 2. Energy Efficiency 2.1 Charge Easily 2.2 Maintain Long Battery Life/Charge Duration 2.3 Eco-friendly 3. Comfort 3.1 Finger Grooves 3.2 Brushing motion is smooth 3.3 Material Selection i. Soft Material for bristles 4. Durability 4.1 Material i. Long-lasting brush material 4.2 Easy to Maintain i. Easy to assemble/disassemble ii. Parts easy to replace iii. Bristle Cover to protect bristles from outside elements5. Cost 5.1 Reasonable Pricing i. $30 or less 5.2 Part Replacement i. Parts are relatively inexpensive6. Size 6.1 Small Enough to fit in smaller backpack/suitcase compartments 7. Aesthetics 7.1 Attractive

External Research Literature review Product dissection Benchmarking Patent search

Initial Concepts-Body

Initial Concepts- Brush Head

Initial Concepts- PowerGeneration

Initial Concepts- Energy Mechanism

Concepts Functions and Means

Brush Head Body/Grip Power Generation Energy Mechanism

Concept 1 

2 Small Circular head with soft bristles

Fits finger contour, multi-planar grip

1 Lithium Ion Rechargeable Long Shaft and Double gear

Concept 2 

2 Small Circular Head, more stiff bristles

Fits finger contour, multi-planar grip, wide bottom, slightly smaller

2 AA Battery Single Gear and shaft

Concept 3 1 big, 2 small circular bristles Fits finger contour, multi-planar grip, wide bottom

2 AA Battery Long Lasting Double Gear and short Shaft

Concept 4 1 Small circular head, soft bristles

Slim body, Rectangular bottom 1 AA Battery Coiled spring and gear shaft

PUGH Chart

Concepts and Functions Quality of Function (.333) Energy Effi ciency (.319) Comfort (.1) Durability (.1) Cost (.084) Size (.041)Aesthetics (.023) Sum RankHank Lin -1 0 0 0 -1 1 -0.351 3Jesse Shaffer 0 0 0 0 0 0 0 0 1Kuraylay Muratbekova 0 -1 0 0 -1 1 -0.337 2

Our team has decided to select Jesse’s combination of the concepts.

Final Sketchby hand

Final Sketchby SolidWorks

CAD Drawings Maximum Comfort Improved Energy

Efficient Improved

functionality What else do you

need?

How does it work? Lithium-ion battery loaded maneuverability Rotations of the gears cause the bristles

to turn East to clean