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Reverse Engineering of Can Openers
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THE ELECTRIC CAN OPENER Samantha Niver
Charles Hunter
Richard Kim
Michael George
Chris Borchers
Opening up
INTRODUCTION
Electric Can Opener!
Function: Tool to open cans automatically
Customer: Chefs everywhere!
Home use
Discussion Evaluation Sustainability Disassembly Testing Introduction
CUISINART HAMILTON BEACH
MODEL: CCO-40BC
$19.95
MODEL: ENSEMBLE
$27.99
Discussion Evaluation Sustainability Disassembly Testing Introduction
KEY FEATURES
HAMILTON BEACH CUISINART
Non-slip pads
Discussion Evaluation Sustainability Disassembly Testing Introduction
Grindstone
Retractable cord
One-year limited
warrantee
One-touch start
Auto-shut off
Magnetic lid holder
Removable blade
assembly
Guiding post
Three-year limited
warrantee
PRODUCT SPECS
Hamilton Beach Cuisinart
Outer Gear Diameter 0.67” 0.67”
Blade Length 0.4” 0.4”
Cord Length 2’ 6.3” 2’ 6.8”
Max Exterior Height 9.3” 9”
Max Exterior Width 4.9” 4.7”
Max Exterior Depth 3.8” 4.7”
Package Height 9.9” 10.1”
Package Width (face) 5.4” 5.5”
Package Depth (side) 5.4” 5.3”
Appliance Weight 2.5 lbs 2.2 lbs
Discussion Evaluation Sustainability Disassembly Testing Introduction
TESTING
Qualitative
Survey
Personal observation
Quantitative
Magnet strength
Exterior gear speed
Activation Force
Discussion Evaluation Sustainability Disassembly Testing Introduction
SURVEY RESULTS
Hamilton Beach Cuisinart
Visual appearance of appliance 4.10 3.75
Visual appeal of packaging 3.65 3.75
Ease of use 3.90 3.70
Perceived durability 4.00 3.60
Safety (blade) 4.75 4.70
Overall 4.08 3.90
Discussion Evaluation Sustainability Disassembly Testing Introduction
Customer rated on a 1-5 scale
8/20 people had used an electric can opener before
15 people gave extra features low importance, 4 high, 1 medium
14 preferred Hamilton Beach, 6 preferred Cuisinart
TESTING RESULTS
Magnet Strength Cuisinart: 2.5 N
Hamilton Beach: 1.6 N
Exterior Gear Speed 1.62 inches / second
0.77 revolutions / second
Activation Force Cuisinart: 13.38 N-m
Hamilton Beach: 6.73 N-m
Discussion Evaluation Sustainability Disassembly Testing Introduction
Product Housing Blade Assembly Gear Assembly Motor Assembly Disassembly
DISASSEMBLY
Motor assembly
Gear assembly
Blade assembly
Housing
Disassembly Discussion Evaluation Sustainability Disassembly Testing Introduction
MOTOR ASSEMBLY
Product Housing Blade Assembly Gear Assembly Motor Assembly Disassembly
MOTOR ASSEMBLY
Current fed into coils
Coils create magnetic
flux
Coils cause phase flux
delay
Creates rotating
magnetic field
Rotates rotor according
to the right hand rule
Product Housing Blade Assembly Gear Assembly Motor Assembly Disassembly
Rotor Rotor
Bracket
Heat Sink Copper Coils Copper
Ring
C-FRAME SHADED POLE MOTOR
Inexpensive
Long life
Low starting torque
Low efficiency
Single phase AC
Typical Applications: fans, small appliances
Product Housing Blade Assembly Gear Assembly Motor Assembly Disassembly
GEAR ASSEMBLY
Product Housing Blade Assembly Gear Assembly Motor Assembly Disassembly
GEAR ASSEMBLY
Product Housing Blade Assembly Gear Assembly Motor Assembly Disassembly
Spur Gear
Idler Gear
Rotor Gear
Pinion Gear
(Underneath)
COMPONENTS
Straight and helical
gears
Speed reduction
through gears
Connect to exterior feed
gear and blade
assembly
Product Housing Blade Assembly Gear Assembly Motor Assembly Disassembly
DIFFERENCES IN GEAR ASSEMBLY
Lubrication
Motor gear orientation
Material type
Gear thicknesses
Attachment of spur gear with feed gear
Removable feed gear with Hamilton Beach for
cleaning
Product Housing Blade Assembly Gear Assembly Motor Assembly Disassembly
BLADE ASSEMBLY
Product Housing Blade Assembly Gear Assembly Motor Assembly Disassembly
CUISINART BLADE ASSEMBLY
Basic design
Bar to prevent arm over rotation
Holds can in place using magnet and pressure between blade and gear
One-touch auto start
Auto-shutoff
Removable blade assembly
Product Housing Blade Assembly Gear Assembly Motor Assembly Disassembly
HAMILTON BEACH BLADE ASSEMBLY
Special features
Adjustable blade arm
Three-prong blade
assembly lock
Magnet strength and
degrees of freedom
More precise button
pressing tool
Feed gear attached
Product Housing Blade Assembly Gear Assembly Motor Assembly Disassembly
HOUSING
Product Housing Blade Assembly Gear Assembly Motor Assembly Disassembly
Front
Back
Discussion Evaluation Sustainability Disassembly Testing Introduction
HOUSING COMPARISON
Product Housing Blade Assembly Gear Assembly Motor Assembly Disassembly
HAMILTON BEACH CUISINART
Grindstone
Cord storage
Chrome finish
Rectangular shaped
Guiding post
Plastic
Ventilation
Rubber stoppers
Connected with screws Bullet shaped
Internal Button External Button
EXPLODED VIEW
Discussion Evaluation Sustainability Disassembly Testing Introduction
Cuisinart : 30 parts
Hamilton Beach : 39 parts
SUSTAINABILITY
Similar expected
product life
No snap fits
Cuisinart has less
parts
Cuisinart is more
sustainable
Aesthetic sacrifices
Discussion Evaluation Sustainability Disassembly Testing Introduction
KEY ASPECTS OF DESIGN
Common Design Aspects
Auto-stop
Spring-loaded lid magnet
Cuisinart
Blade assembly connection key
Hamilton Beach
Blade assembly lock
Removable feed gear and blade assembly
Discussion Evaluation Sustainability Disassembly Testing Introduction
SUGGESTIONS FOR IMPROVEMENT
Automatic retractable cord
Snap fits
Quieter operation
Cuisinart Improve aesthetics
Hamilton Beach Balance aesthetics and
functionality
Discussion Evaluation Sustainability Disassembly Testing Introduction
CONCLUSION
Cuisinart
Simpler
Same performance, lower cost
More sustainable
Customers not always right?
Survey results
Discussion Evaluation Sustainability Disassembly Testing Introduction
DISCUSSION
For this product which is more important, cost
or aesthetics?
Is simplicity or complexity preferred when
executing a simple task?
In the kitchen, is it important to design a
product that can perform more than one task?
What design features would you want in your
ideal can opener?
Discussion Evaluation Sustainability Disassembly Testing Introduction
