kelsi mckinley lester, leah frederick, steve schweigert, eric sternberg 27 february 2012
TRANSCRIPT
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
Project Management
Divide and Conquer! Realization of individual strengths
Technology Email
Surveymonkey.com
ANGEL team space
Communication is key
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
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.
Step 3:Internal and External Research
Part Brush Head Overall
ToothbrushBattery Powered Toothbrush
Rotating Bristles
Clean the teeth
US D/268,028
Competitive Patent
US6,178,579 B1
General Patent
US 20060112505A1
Evenly Cleans teeth
US20026735804
Patent Search
BenchmarkingFeature Oral-B Crest
SpinbrushColgate Reach
Packaging 3 5 3 2
Aesthetics 4 2 3 4
Ease to clean 4 3 3 4
Convenience of on/off switch
4 4 4 5
Travel Size 3 4 3 2
Effectiveness 4 3 4 5
Price 4 5 4 3
Morph Chart
Energy MechanismBrush Head
Design
Human Factors/Body
DesignPower 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 toothbrushHollow 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
Pugh ChartsBrush Head Pugh Chart
Body Design Pugh Chart
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 -1.00 -0.0018 3
Concept 2: Cut-Outs to
Conserve Materials
0.00 0.00 0.00 0.00 2
Concept 3: Finger Grips 1.00 -1.00 1.00 0.0368 1
Function: Brushhead
Customer Needs Size ComfortPhysical
Maintainance
Sum Rank
Weighting 0.02 0.11 0.07
Concept 1: Bristles pointing in 3 different
directions -1.00 2.00 -1.00 0.143
7 2
Concept 2: Replaceable/Removable
Bristle Pads 2.00 -1.00 2.00 0.06 3
Concept 3: Bristles that change color with wear 0.00 0.00 0.00 0.00 4
Concept 4: Two bristle pads that rotate in
opposite directions 1.00 1.00 1.00 0.20 1
Concept 5: Vibrating tongue cleaner on
opposite side -2.00 -2.00 -2.00 -0.399 5
More Pugh Charts
Energy Mechanism Pugh Chart
Power Generation Pugh Chart
Function: Energy Mechanism
Customer Needs Performance Noise Level Sum Rank
Weighting 0.67 0.03
Concept 1: Shorter Oscillation Rod -1.00 -1.00 -0.696 3
Concept 2: Two moving bristle sets 0.00 0.00 0.00 2
Concept 3: Brushead Pivots 0.00 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 0.03 1
Concept 2: Direct Cord 0.00 0.00 0.00 2
Concept 3: Switch on Charging Station -1.00 0.00 -0.67 3