Collin Russo
David Tawadras
Brian Johnson
Engineering Design 100
To create a new innovative toothbrush that
consumers will love because of the products
durability, ease of use, aesthetics, and price. We will
have to create new design concepts that focus on the
design of energy storage, brush head design, and
body shape that will appeal to most if not all
consumers. The product will appeal to not only
children 6+, but all adults will enjoy this product.
“To design an innovative
electric toothbrush that is
comfortable, easy to use,
and cost efficient.”
Customer Needs Assessment
1. Function
1.1 Cleans teeth safely and
effectively
2. User Friendly
2.1 Simple design
2.2 Easy to use
2.3 Easy to clean
2.4 Low Maintenance
2.5 Efficient
2.6 Safe
3.
Comfortability
3.1 Comfortable on teeth
3.2 Comfortable in hand
4. Aesthetics
4.1 Attractive product
4.2 Personalize able
5. Durability
5.1 Waterproof
5.2 Reliable
5.3 Long lasting
6. Packaging
6.1 Lightweight
6.2 Shows product clearly
Customer Needs Assessment
Packaging
Function
Aesthetics
User Friendly
Comfortablilty
Durability
Total
Weighting
Packaging
1
0.17
0.33
0.25
0.33
0.50
2.58
0.052631579
Function
6.00
1
2.00
1.50
2.00
3.00
15.50
0.315789474
Aesthetics
3.00
0.5
1
0.75
1.00
1.50
7.75
0.157894737
User Friendly
4.00
0.67
1.33
1
1.33
2.00
10.33
0.210526316
Comfortability
3.00
0.5
1.00
0.75
1
1.50
7.75
0.157894737
Durability
2.00
0.33
0.67
0.50
0.67
1
5.17
0.105263158
Total
49.08
External Search
Function
Gears, Pivotal motion
Oscillating Head
5617603
5577285
7331076
6536066
Energy Storage
On/off control
Shape/Aesthetics
Alkaline Batteries (AAA),
Circuits
Switch, button
Housing, Design
5376480
7767336
6780539
5510203
4210791
4709438
3489936
7228583
11015111
External Search
Model Number/Name
Spinbrush My Way
Braun Oral-B Vital Sonic Clean
Interplak MODEL #DPI6
Braun Oral B Stages WALLE
Power
2x AAA battery
Rechargeable battery
Rechargeable
2x AAA battery
Cleaning
vibrating head
CrissCross bristles
triple-action brush head
Vibrating head
Aesthetics
Customizable
Shades of Blue
Plain white
Cartoon character
Comfortability
Average no grip
Rubber Grip
Average no grip
Odd Shape, Hard to Grip
Cost
$9.99
$24.82
$17
$5.99
External Search
(See next slide for detailed information about parts)
Bill of Materials
Part#
Part Name
QTY
SOP
Effect
1
No
2
Battery cover
screw
Battery cover
1
No
3
2x AAA batteries
2
Yes
4
Head Washer
1
No
5
Motor axel
1
Yes
6
Motor Cover
1
No
7
Motor
1
Yes
8
Round Gear
1
Yes
1
9
Gear Transfer
1
Yes
10
Bristles
2
yes
11
Switch Protector
1
No
12
Switch
1
Yes
13
Screws
4
No
14
Washer Screws
4
No
15
Battery Tray
1
Yes
16
+ Battery
Conductor
1
Yes
17
-Battery
Conductor
1
Yes
18
Housing
2
Yes
Function
Holds on battery
cover
Holds in batteries
Provide power
Provides
protection to
plastic housing
Translates power
from motor to
head
Keeps motor in
place
Provides
movement
Changes direction
and speed of
motor
Changes motion to
linear
Rotate to clean
teeth
Waterproofs
button
On and off switch
Keeps battery tray
in place
Keeps motor in
place
Holds batteries in
place
Conducts
electricity
Conducts
electricity
Keeps all the parts
in place
Mass
(oz, g)
Material
Manuf. Process
Dimensions
ALL IN (mm)
Cost
.1g
Metal
Pressed
4π x 4
.01
6.1g
Metal, Plastic
Molded
15 x 25 x 30
.25
22.3g
Metal, Acid
Molded and pressed
100π x 40
.75
.2g
Metal
Molded
1.7g
Metal, Plastic,
Rubber
Molded
1.4g
Plastic
Molded
17.1g
Metal, Plastic
Manufactured
20 x 35 x 15
.9g
Plastic
Molded
100π x 5
Manufactured
6 x 20 x 5
.05
36π x 2
9π x 65
10 x 20 x 45
.06
.33
.15
1.05
.19
.4g
Metal, Plastic
1.5g
Plastic, Fibers
Machined
(.25π +104) x 12
.28
.6g
Rubber
Molded
25 x 20 x 2
.03
2.2g
Metal, Plastic
Molded
15 x 15 x 20
.03
.6g
Metal
Molded
.6g
Metal
Molded
2.2g
Plastic, Metal
Molded
.7g
Metal
Machined
.8g
Metal
Machined
22.7g
Plastic
Molded
9π x 6
16π x 6
40 x 20 x 5
26 x 10 x .1
45 x 6 x .1
205 x 30 x 10
.04
.04
.02
.03
.03
.70
Hierarchy of Parts
Assembly
Level
Base
Battery Screw
Body
Sub-assembly
Level
Battery Cover
Motor
Motor Axle
Body
Battery Housing
Motor
Bristles
Round Gear
Motor Cover
Gear Transfer
Battery Tray
Battery Conductor (-)
Switch Protector
Batteries
Battery Conductor (+)
Head Washer
Switch
Screw
Washer screw
Component
Level
Product Pictures
Concept Generation
Head Design:
1. The top component oscillates in a rotational
motion about 120 degrees. The bottom bristles
are stationary.
2. The sets of bristles in circular clusters that
rotate. Top goes counterclockwise, middle goes
clockwise, and bottom goes counterclockwise.
3. One cluster of bristles that shift up and down
quickly.
4. There are two clusters of bristles in circle that
rotate. Top is clockwise, bottom is
counterclockwise. Around the circular clusters
are bristles aligned in an ellipse.
5. There is one cluster of bristles that rotates side
to side.
Body Design:
1. Standard straight body.
2. Angled neck for a better reach.
3. Head and most of body is compactable into
base.
4. Toothpaste dispenser in base of toothbrush.
5. Base has a sterilizing liquid to store brush head
and keep it clean.
Power Source:
1. Alkaline Batteries x2
2. Solar powered rechargeable batteries
3. Mechanical Manual Crank
4. Direct plug in to 110v power source
5. Rechargeable Lithium battery- Plug in to 110v
power source to recharge internal battery
Concept Generation
Energy
Motor
Rotational
Cleaning
Brush
Head
Bristles
Switch
Closes
Circuit
On/Off
Transitional
Rotational Head
Sends
Signal
Concept Generation
Concept Generation
120° rotational head with stationary bottom
Head
3 rotational bristle clusters
Vertical bristle oscillation
2 rotational clusters with stationary border
Horizontal bristle oscillation
Straight Neck
Body Design
Bent Neck
Toothbrush
Telescoping Body
Toothpaste Dispenser Body
Cleaning Solution in Body
2x AAA batteries
Nuclear
Solar technology (similar to calculator)
Crank
Plugged into wall
Rechargeable battery
Concept Selection
Great handle designs make brushing fun!
Promotes healthy brushing; removes plaque; massages gums
Smaller brush head for smaller mouths
Less than $7 U.S. suggested retail price**
– only a few dollars more than an ordinary manual toothbrush!
Ergonomically designed for a comfortable grip
Includes 2 AAA batteries
Children under 3 use under adult supervision
Concept Selection
A
B
C
120° ocsillation Triple Spin Head Vertical Oscillation
D
E
Double Oscillation Head
Horizontal Oscillation
Ease of Production
+
-
0
-
0
Ease of Use
0
0
0
0
0
Durability
0
-
+
-
+
Portability
0
0
0
0
0
Cost of Production
+
-
+
-
0
SUM +'S
2
0
2
0
1
SUM 0'S
3
2
3
2
4
SUM -'S
0
3
0
3
0
NET SCORE
2
-3
2
-3
1
RANK
1
4
1
4
3
yes
no
yes
no
no
CONTINUE?
Concept Selection
A
B
C
D
E
Straight
Bent Neck
Collapsible
Toothpaste Dispenser
Cleaning Solution
Ease of Production
+
+
0
-
-
Ease of Use
0
+
+
+
-
Durability
+
+
-
-
-
Portability
0
0
+
+
-
Cost of Production
+
+
0
+
-
SUM +'S
3
4
2
3
0
SUM 0'S
2
1
2
0
0
SUM -'S
0
0
1
2
5
NET SCORE
3
4
1
1
-5
RANK
2
1
3
3
5
yes
yes
no
no
no
CONTINUE?
Concept Selection
A
B
C
D
E
Batteries
Solar Power
Crank
Wall Plug In
Rechargeable Battery
Ease of Production
+
-
-
0
+
Ease of Use
+
0
-
-
+
Durability
0
-
0
0
+
Portability
+
0
0
-
+
Cost of Production
0
-
0
0
-
SUM +'S
3
0
0
0
4
SUM 0'S
2
2
3
3
0
SUM -'S
0
3
-2
2
1
NET SCORE
3
-3
-2
-2
3
RANK
1
5
3
3
1
yes
no
no
no
yes
CONTINUE?
After receiving our Colgate Spin Brush, we found many flaws in the
design that could’ve been redesigned. Although some designs are optimal
since they are very cost efficient. For example, the brush head is an efficient
design, since redesigning the head to clean teeth better would not only of
raised the price dramatically, but also would’ve made it harder for production
to occur. So, we decided to keep the brush head design in our newly designed
toothbrush. But, we saw some things that needed to be changed, most
important was the energy source. The price of the product would still increase
to make this change but we found it to be very cost efficient in making the
switch. Instead of the AAA batteries we included a rechargeable battery pack,
that can easily be plugged in to the toothbrush and after being fully charged
would last for 4 hours of use. We found that consumers hated when their
toothbrushes lost power, because of poorly charged batteries. We also bent
the head to 60 degrees since we found that most cavities were a result of
toothbrushes not cleaning areas that are hard to reach.