Chris GuyanShane DavisBrad CroninEthan Flint

October 7, 2011

Project 1:Toothbrush Redesign

Determination of the need and problem definition Assessed customer need and weighted

different options Conceptualization

Sketched different designs and considered the functions

Performed external searches Literature searches, patents, and

benchmarking Internal search

Preliminary design Determined the best options and planned

how it would work Detailed Design

Detailed technical drawings Production

SolidWorks Material selection

Design Activities

Planning and Scheduling Define Objectives List Tasks Estimate work duration Determine interdependent tasks Schedule tasks Schedule Resources

Directing Assign tasks Review criteria for task completion Controlling Report progress Review Progress Re-plan Review completed work Resolve issues Close project

Project Management

1. Portable (0.40,0.40) 1.1 Light 1.2 Travels well F.1 Collapsible C.1 Small2. User friendly (0.10,0.10) 2.1 Low noise 2.2 Comfortable grip 2.3 Easy to operate 2.4 Colorful F.2 Rechargeable battery3. Durable (0.20,0.20) 3.1 Maintenance free4. Functionality (0.30,0.30) 4.1 Cleans well C.2 Fast oscillations C. 3 Retails under $25

Hierarchal Customer Needs

After assessing customer needs, our electric toothbrush design will focus on portability, user friendliness, durability, and functionality. To achieve these goals, our new concept will be collapsible, have an improved rechargeable power supply, and be overall appealing to our customers.

Revised Problem Statement

Researched external sources Found information about: Customer reviews on similar toothbrushes Existing toothbrush patents Other products on the market

Dissected an electric toothbrush to find information on how it performs

External Search Activities

Thinner Increased portability Easier to pack for trips

User friendly

Concept 1Sleeker body

Chargeable through any laptop USB connection Easy charge anywhere across the globe

Same cord as many new cell phones

Concept 2Rechargeable battery

and Micro-USB charging port

Cleans teeth better Better performance

Concept 3360⁰ Rotating Head

“Swiss Army Knife” Design Multiple Functions

Fully functional toothbrush Pull-out toothpick Side flosser

Concept 4

Easy storage Replaceable head

More sanitary Travel friendly

Concept 5Detachable Head

Morphological ChartConcept Brush Head Body/Grip Power

GenerationEnergy Mechanism

1 Brush Head Covers Entire tooth

Collapsible USB charged rechargeable battery

Shaft plus gear

2 2 Circular Brush Heads

Soft Grip that forms to hand

2 AA Batteries

2 Shafts plus gear

3 360 degree rotating head

Sleeker Design

1 AA battery 1 shaft plus gear

4 Triangle Brush Head

Shorten the length of the body

2 AA batteries

1 Shaft plus gear

Morphological Chart

Customer NeedsWeight 0.6Size 0.4Brushing Effectiveness 0.30Life 0.20

Concept Selection

• Assigned weights to our four customer needs

• Compared our concepts with each other• Found best options

for our design

Sleeker Body Rechargeable Battery

Micro-USB charging port 360⁰ Rotating Head Hard-Cover Traveling Case Detachable Head

Portability

Final Design

The on/off button is connected to the circuit Controls the flow of current from the

rechargeable battery. When the circuit is closed (on) the

battery powers the motor Near the head of the toothbrush.

The motor turns a gear, which is connected to a cam gear unit

Then converts the rotary motion of the motor to a spinning/oscillating motion, which is then applied to the head.

How Does it Work?

Overall success Met the needs of the customers Very travel friendly Micro-USB to USB charging port is

vital aspect of our design Optimal performance

Concluding Remarks

Thank you!