Eric Zhuang
-A current UC Berkeley graduate student studying Mechanical Engineering with concentration in Product Design.
Ergonomic Laptop Case Design
A group project with an initial aim to alleviate neck pain for the current generation, lasting for one semester.
Based on our findings from interviews and frameworks, we eventually decided on the "Ergonomic Laptop Case" concept. The whole process includes design thinking practices, 3D-Modelling, FEA analysis, design for manufacturing, and business model.
Stage 1: Interviews & Concept Generation
In order to gain empathy before we start generate design concepts, we interviewed people that could be divided into two groups:
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Potential customers who have neck pain like
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Students
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Secretaries
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Consultants
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Specialists who have extensive knowledge in neck pain like
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Ergonomics Specialists
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Professors of Physical Therapy/Ergonomics
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Physical Therapists
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Except interviews, observations were conducted in the school library to learn about people's behavior.
After gathering customers' potential needs and specialists' insights, 20 design concepts were generated by myself. Some of them are listed below:
Stage 2: Concept Selection & Lo-Fi Prototyping
From the interview results, competitor analysis and group discussion, 7 selection criteria were agreed on to be used in Concept Screening Matrix & Concept Selection Matrix. They are:
Three concepts were selected and low fidelity prototypes of each were made.
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Portability
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Comfort
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Convenience
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Attractiveness
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Seamlessness (not intrusive to users' lifestyle)
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Price
Laptop Viewing Glasses
-Optical or digital
-Not obstructive
-No need to hunch & look down
Alert App
-No extra hardware needed
-Customizable
-Cheap
Ergonomic Laptop Stand
-Encouraging neutral position
-Not intrusive
-Adjustable height
Stage 3: Concept Rendering & Testing
Neck Tilt Software
Feedback from potential users and specialists:
Pros:
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Cool
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No extra hardware
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Cost-effective
Cons:
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Distracting
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Instrusive
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Non-neutral posture
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Fatigue in vision
Ergonomic Laptop Case
Feedback from potential users and specialists:
Pros:
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Easy to carry
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Simple design
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Address the major ergonomics risk factor with laptop design
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Easy setup
Cons:
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May scratch laptop
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Weight/size concern
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Durability concern
From the concept testing results, Neck Tilt software might not be an effective solution to neck pain according to the opinions from the specialists. Besides, it is too intrusive. In addition, when we brainstormed on the Business Model, we realized that the revenue channel for this software was so limited and no huge profit could be foreseen as the selling price would be as low as $1. Meanwhile, the laptop case allows us to target a market broader than just people with neck pain with an acceptable price of around $40.
Stage 4: Redesign & Prototyping
Upon the concerns from concept testing results, the CAD design was modified accordingly:
- The size of the laptop case was changed to create enough clearance between the case and the laptop.
- Instead of using aluminum as the material, we chose to use acrylic to build the prototype which would be very light and reduce risks of scratching the laptop.
- The durability concerns were mainly focusing on the hollow bars that supported the stand. So we redesigned them to be solid and carried out some Finite Element Analysis to validate the design.
New Design Animation
Medium-fidelity Prototype
Invidual Contributions:
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Concept generation
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Alert App rendering
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Most CAD Design work in Solidworks (including FEA)
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All Solidworks Animation to show concepts
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Providing manufacturing process design suggestions
Future Design Improvement:
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Top/bottom plate geometry modification for weight reduce and cooling
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Fixture design
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Material change for lower weight and better surface texture