Electric Toothbrush Redesign Hank Lin Jesse Shaffer Kuralay 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 elements 5. Cost 5.1 Reasonable Pricing i. $30 or less 5.2 Part Replacement i. Parts are relatively inexpensive 6. 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 - Power Generation

Initial Concepts - Energy Mechanism

Concepts Functions and Means Brush HeadBody/GripPower GenerationEnergy Mechanism Concept 1 2 Small Circular head with soft bristles Fits finger contour, multi-planar grip 1 Lithium Ion RechargeableLong 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 BatterySingle Gear and shaft Concept 3 1 big, 2 small circular bristles Fits finger contour, multi-planar grip, wide bottom 2 AA Battery Long LastingDouble Gear and short Shaft Concept 4 1 Small circular head, soft bristlesSlim body, Rectangular bottom1 AA BatteryCoiled spring and gear shaft

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

Final Sketch by hand

Final Sketch by Solid Works

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