Team 6 Design Project I: Sustainable Electric Toothbrush Kelsi McKinley Lester, Leah Frederick, Steve Schweigert, Eric Sternberg 27 February 2012

Sequence of Design Activities Analyze Customer Needs Revise Design Statement External Research Internal Research (Lab Dissection) Concept Generation Concept Selection Design Realization Kelsi/Leah

Project Management Divide and Conquer! Technology Communication is key Realization of individual strengths Technology Email Surveymonkey.com ANGEL team space Communication is key Kelsi

Step 1: Customer Needs Assessment 1.0 Portability (.07) 1.1 Size: Small (.25) 1.2 Weight: Light (.43) 1.3 Storage Options: Comes with cover/case (.25) 1.4 Travel-Friendly: Foldable (.06) 2.0 Performance (.67) 2.1 Battery Run Time: Long Battery Life (1.0) F.1 Cleanliness of teeth: Works well 3.0 User-Friendliness (.26) 3.1 Comfort: Gentle on Gums/Mouth (.44) 3.2 Electronic Maintenance: Easy to replace battery or charge (.13) 3.3 Physical Maintenance: Easy to replace bristles (.13) 3.4 Ergonomics: Comfortable Handle (.19) 3.5 Noise Level: Quiet (.10) C.1 Low Cost Leah

Step 2: Revised Problem Statement Our design problem is to design an inexpensive electric toothbrush that, above all else, functions well. Considering customer needs, we have determined that the design must have a long battery life and must be fairly user-friendly. Our team has decided to focus on minimizing the quantity of materials used in the toothbrush body and power usage. Leah

Step 3: Internal and External Research Patent Search    Part Brush Head Overall Toothbrush Battery Powered Toothbrush Rotating Bristles Clean the teeth US D/268,028 Competitive Patent 6,178,579 B1 General Patent US 20060112505A1 Evenly Cleans teeth 20026735804 Steve Benchmarking Feature Oral-B Crest Spinbrush Colgate Reach Packaging 3 5 2 Aesthetics 4 Ease to clean Convenience of on/off switch Travel Size Effectiveness Price

Step 4: Top Concepts Each do area: Steve-Energy Mechanism Leah- Human Factors Kelsi-Brush Head Eric-Power

Human Factors/Body Design Morph Chart Energy Mechanism Brush Head Design Human Factors/Body Design Power Generation Shorter rod for oscillation which leads to faster toothbrush speed because short period of revolution. Bristle pointing in three directions to increase brushing ability Package in eco-friendly materials such as recycled cardboard Attach a cord to the toothbrush body so the toothbrush no longer requires a battery Oscillation moves two independent brush head pieces for greater cleaning power. Bristles change color with wear so the user knows exactly when the bristles need to be replaced Build body from eco-friendly materials such as hemp/wood composite Incorporate an on/off switch into charger so that energy is not wasted when the device is not in use Free-moving brush heads that are only held in place by one pivot point so the user can still clean their teeth without turning on the toothbrush Removable Bristle pads that can be locked into place through a twisting motion Smallest possible toothbrush diameter (size of battery) Charge with a kinetic energy system similar to a shakable flashlight A sliding power intensity button on the toothbrush’s side to allow consumers to choose their level of cleaning Vibrating tongue cleaner on the toothbrush’s reverse side Hollow toothbrush Hollow charger to reduce material usage Larger battery to reduce the charging frequency Two brush heads that rotate in opposite directions Finger grips molded into the body Retractable charge cord in base (already covered in previous slide)

Pugh Charts Brush Head Pugh Chart Body Design Pugh Chart Function: Brushhead   Customer Needs Size Comfort Physical Maintainance Sum Rank Weighting 0.02 0.11 0.07 Concept 1: Bristles pointing in 3 different directions -1.00 2.00 0.1437 2 Concept 2: Replaceable/Removable Bristle Pads 0.06 3 Concept 3: Bristles that change color with wear 0.00 4 Concept 4: Two bristle pads that rotate in opposite directions 1.00 0.20 1 Concept 5: Vibrating tongue cleaner on opposite side -2.00 -0.399 5 Function: Body Design and Human Factors   Customer Needs Size Weight Ergonomics Sum Rank Weighting 0.02 0.03 0.05 Concept 1: Smaller Toothbrush Diameter 1.00 -1.00 -0.0018 3 Concept 2: Cut-Outs to Conserve Materials 0.00 2 Concept 3: Finger Grips 0.0368 1 Each do area

More Pugh Charts Power Generation Pugh Chart Energy Mechanism Pugh Chart Function: Energy Mechanism   Customer Needs Performance Noise Level Sum Rank Weighting 0.67 0.03 Concept 1: Shorter Oscillation Rod -1.00 -0.696 3 Concept 2: Two moving bristle sets 0.00 2 Concept 3: Brushead Pivots 1.00 0.026 1 Function: Power   Customer Needs Battery Run Time Electronic Maintainance Sum Rank Weighting 0.67 0.03 Concept 1: Shake 0.00 1.00 1 Concept 2: Direct Cord 2 Concept 3: Switch on Charging Station -1.00 -0.67 3 Each do area

Step 5: Final Design Drawing Eric and rest of team