Electric Toothbrush Redesign

Josh AddisonErinn Kennline

Taylor LaceyWill Lorenz

February 27, 2012

Outline1. Introduction

1. Initial Problem Statement2. Customer Needs Assessment

1. Weighting of Customer Needs3. Revised Problem Statement4. External Search

1. Literature Review2. Patent Search3. Benchmarking4. Product Dissection5. Design Target

5. Concept Generation1. Concept

6. Concept Selection and Final Design1. Design Drawings, Parts List and Bill of Materials2. How It Works

7. Conclusions

Project Management (AHP)  A B C D E F G H I J K L M Total  A 1 3 8 1/2 5 2 9 8 4 8 6 5 8 67.5 0.1757B 1/3 1 6 1/4 3 1/2 7 6 2 6 4 3 5 44.08 0.1147C 1/8 1/6 1 1/9 1/4 1/7 2 1 1/5 1 1/3 1/4 1/2 7.08 0.0184D 2 4 9 1 6 3 9 9 4 9 7 6 8 77 0.2004E 1/5 1/3 4 1/6 1 1/4 5 4 1/2 7 2 1 3 25.45 0.0663F 1/2 2 7 1/3 4 1 8 7 3 7 5 4 6 54.83 0.1427G 1/9 1/7 1/2 1/9 1/5 1/8 1 1/2 1/6 1/2 1/4 1/5 1/3 4.14 0.0108H 1/8 1/6 1 1/9 1/4 1/7 2 1 1/5 1 1/3 1/4 1/2 7.08 0.0184I 1/4 1/2 5 1/4 2 1/3 6 5 1 5 3 2 4 34.33 0.0894J 1/8 1/6 1 1/9 1/4 1/7 2 1 1/5 1 1/3 1/4 1/2 7.08 0.0184K 1/6 1/4 3 1/7 1/2 1/5 4 3 1/3 3 1 1/2 2 18.09 0.0471L 1/5 1/3 4 1/6 1 1/4 5 4 1/2 4 2 1 3 25.45 0.0663M 1/8 1/5 2 1/8 1 1/6 3 2 1/4 2 1/2 1/3 1 12.03 0.0313  384.14

A Customizable/Comfortable HeadB Minimal NoisesC Long Lasting (brush itself)D EffectivenessE Sustainable energy

F Low Price

G Dentist Recommended

H Strong Handle

I Ease of Use

J Travel-Friendly

K Not bulky

L Ease of Charging

M Different sizes

Customer Needs Chart1. User Friendly

1. Customizable/Comfortable Head 2. Travel Friendly3. Dentist ApprovedC.1 Low PriceC.2 Ease of useC.3Not bulkyF.1 Effective CleaningF.2. Minimal NoiseF.3 Different Sizes

2. Sustainable 2.1 Ease of ChargingF.4 Sustainable Energy

3. Durable F.5 Strong HandleF.6 Long Lasting Brush

External Search Activities• From the Oral B website, we found current information on

how electric toothbrushes are made and looked into patents.

• We looked at the recyclability of toothbrushes and materials we can use to make our toothbrush recyclable.

• We used another companies toothbrush model that was not electric but was sustainable as a model to offer sustainability ideas.

• We looked at how a lot of energy is wasted to gain an understanding of where we could be saving the most energy when designing our toothbrush.

Generated Concepts

• To generate concepts, we used the time in class to come up with all sots of ideas. Some were not even feasible but overall, it was helpful.

• In the next slides, you can see some of the ideas that we each come up with during this time period.

Concept Generation

Concept Generation

Concept Generation

Concept Generation

Morphological Table

Idea Number Brush Head ideas Energy Mechanism ideas Body Design Ideas Power Mechanism

1Completely bristled head with the 360 motion Brushhead moves clockwise

Separate parts that are replaceable Electromagnet

22 sided head with brush head on one side and polishing on the other

Elongate Motor within the brush to make motion closer to head and more efficient Recyclable materials USB and Solar Panel

3 Pressure sensor in the brushheadSmaller connecting rod for more efficent motion on and off button on the bottom Heat Pack powered

4 Time senstive bristles Brush head moves up an downSolid plastic covered in plastic jelly grip Pull motor system

5Interchangable brushhead designs for one main base Bristles move in and out of the brush

Curved neck to make brushing either Normal Chemical Battery

6 Tongue Cleaner ( on Back)Oscillating brushhead-motor can turn to do this Rounded bottom Water turbine( power from shower)

Concept Selection and Pugh ChartsBody Design

Customizable/Comfortable

HeadMinimal

NoiseLong-

Lasting Brush

Effective Cleaning

Sustainable Energy Low Price Dentist

ApprovedStrong Handle

Ease of Use

Travel Friendly

Not bulky

Ease of Charging

Different Sizes

Iteration 1 Weight

0.18 0.11 0.02 0.2 0.07 0.14 0.01 0.02 0.09 0.02 0.05 0.07 0.03

Concept Total Rank1 1 -1 1 1 1 -1 1 1 -1 1 1 1 1 0.33 12 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 43 -1 -1 -1 -1 -1 -1 -1 -1 1 -1 -1 -1 -1 -0.91 34 -1 1 -1 -1 -1 1 -1 -1 -1 -1 -1 -1 -1 -0.75 25 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 46 0

Customizable/Comfortable

HeadMinimal

NoiseLong-

Lasting Brush

Effective Cleaning

Sustainable Energy Low Price Dentist

ApprovedStrong Handle

Ease of Use

Travel Friendly

Not bulky

Ease of Charging

Different Sizes

Iteration 2 Weight

0.18 0.11 0.02 0.2 0.07 0.14 0.01 0.02 0.09 0.02 0.05 0.07 0.03

Concept Total Rank1 0 0 12 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 23 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 24 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 25 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 26 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 2

Concept Selection and Pugh Charts

Brush Head Design

Customizable/Comfortable Head

Minimal Noise

Long-Lasting Brush

Effective Cleaning

Sustainable Energy

Low Price

Dentist Approved

Strong Handle

Ease of Use

Travel Friendly

Not bulky

Ease of Charging

Different Sizes

Weight 0.18 0.11 0.02 0.2 0.07 0.14 0.01 0.02 0.09 0.02 0.05 0.07 0.03 Concept Total Rank

1 -1 -1 -1 -1 -1 -1 1 -1 -1 -1 1 1 -1 -0.75 32 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1.01 53 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 -1 -1 -1 -0.97 44 -1 1 -1 -1 -1 1 -1 -1 -1 -1 -1 -1 -1 -0.51 25 1 -1 1 1 1 -1 -1 1 1 -1 -1 -1 1 0.21 16 0 0 0 0 0 0 0 0 0 0 0 0 0 0

Concept Total Rank

1 1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 1 -0.01 12 -1 -1 -1 -1 1 -1 1 -1 -1 1 -1 -1 -1 -0.81 33 -1 -1 -1 -1 -1 -1 -1 1 -1 -1 -1 1 -1 -0.83 44 -1 -1 1 -1 -1 1 -1 -1 -1 -1 -1 -1 -1 -0.69 25 0 0 0 0 0 0 0 0 0 0 0 0 0 0 6 -1 1 -1 -1 -1 -1 -1 -1 -1 -1 1 -1 -1 -0.69 2

Concept Total Rank

1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 -1 -1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 -0.95 43 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 1 -1 -0.87 34 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1.01 55 1 -1 1 1 1 -1 -1 1 1 -1 -1 -1 1 0.21 16 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 -0.41 2

Concept Selection and Pugh Charts

Power Generation

Customizable/Comfortable

HeadMinimal

NoiseLong-

Lasting Brush

Effective Cleaning

Sustainable Energy Low Price Dentist

ApprovedStrong Handle

Ease of Use

Travel Friendly

Not bulky

Ease of Charging

Different Sizes

Weight 0.18 0.11 0.02 0.2 0.07 0.14 0.01 0.02 0.09 0.02 0.05 0.07 0.03 Concept Total Rank

1 -1 -1 -1 -1 -1 -1 -1 1 -1 1 -1 -1 -1 -0.93 42 -1 1 -1 1 1 -1 -1 -1 -1 -1 -1 1 -1 -0.11 13 -1 -1 1 -1 -1 1 -1 -1 -1 -1 -1 -1 -1 -0.69 34 0 0 0 0 0 0 0 0 0 0 0 0 0 0 5 1 -1 -1 -1 -1 -1 -1 -1 1 -1 1 -1 1 -0.31 26 -1 -1 -1 -1 -1 -1 1 -1 -1 -1 -1 -1 -1 -0.99 5

Concept Selection and Pugh Charts

Energy Mechanisms

Customizable/Comfortable

HeadMinimal Noise

Long-Lasting Brush

Effective Cleaning

Sustainable Energy Low Price Dentist

ApprovedStrong Handle

Ease of Use

Travel Friendly

Not bulky

Ease of Charging

Different Sizes

Weight 0.18 0.11 0.02 0.2 0.07 0.14 0.01 0.02 0.09 0.02 0.05 0.07 0.03 Concept Total Rank

1 -1 -1 -1 -1 1 -1 -1 1 -1 1 -1 -1 -1 -1 -0.41 32 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1.01 53 1 -1 1 1 -1 1 1 -1 1 -1 1 1 1 1 0.05 14 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1.01 55 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 26 -1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -0.65 4

Final Design• Interchangeable heads

– Vibrating or Rotating – Soft or Hard Bristles

• Slim body design with all replaceable parts

• An combination electromagnetic/USB charger

• A rod that vibrates or in a gear mechanism included in replacement heads

Final Design Operations

• Electromagnetism/battery power is used to power the toothbrush

• While brushing, current is produced and converted within the brush.

• Power is transferred to the motor which using a series of gears, will convert the motion to vibrating or rotating in the neck of the toothbrush.

Concluding Remarks