Essential Utility Knife

Ergonomic Redesign

An ergonomic utility knife that harmoniously merges safety, functionality, and comfort. Through meticulous market research and a comprehensive evaluation of existing knives, I embarked on a journey to revolutionize ergonomic design. Countless iterations and mock-ups were meticulously crafted, all with a singular focus: perfecting the knife's handle. Today, the culmination of this endeavor stands as a testament to innovation. This utility knife isn't just a tool; it's a reflection of my commitment to enhancing user experience, delivering a handle that embodies seamless usability and ergonomic excellence.

Industrial Design

Client

San Jose State University

Year

2022

Utility Knife hanging from wall.
Hang or store this versatile utility knife anywhere you need, always within arm's reach for any task.
Utility Knife sitting on a wood table with cutting mat and screwdriver.
Enhance safety with the added benefit of requiring a flathead screwdriver for blade replacement, ensuring secure disassembly only when intended.
Utility Knife cutting string.
Experience added convenience with a built-in string cutter that remains functional even when the blade is closed, providing versatile usability at all times.

[Ergonomics]

Elevating design through ergonomics.

In the realm of design, where functionality meets form, one principle stands as an unwavering beacon: ergonomics. As a passionate advocate for innovation in hand tool design, I recognize the pivotal role that ergonomics plays in crafting tools that not only perform optimally but also prioritize user comfort and safety.

Ergonomics in action.

Statistics show that ergonomic design isn't a mere luxury but a necessity. According to studies conducted by the Occupational Safety and Health Administration (OSHA), ergonomic-related injuries account for a significant portion of workplace injuries. In fact, the Bureau of Labor Statistics reveals that nearly 33% of all work-related injuries are caused by overexertion and repetitive motion. These alarming numbers underscore the critical importance of crafting tools that mitigate strain and promote user well-being.

Precision in design measurements.

In my journey to create functional masterpieces, I delve into precise measurements and data-driven insights. The science of ergonomics employs anthropometric data, considering measurements such as hand size (average hand width of 7-8 cm), grip strength (ranging from 25-85 lbs), and range of motion. Applying these metrics, I craft tools that are tailor-made for human interaction, ensuring that grips are comfortable, joints are natural, and motions are fluid.

A holistic approach.

Ergonomic design isn't solely about physical comfort; it encompasses the mental and emotional aspects of tool use. A tool that fits seamlessly into the user's hand becomes an extension of their expertise, enhancing their confidence and efficiency. This holistic approach to design isn't a mere afterthought – it's embedded in every curve, every edge, and every interaction with the tool.

Innovating for user-centric excellence.

As a designer, I strive for excellence that resonates with every user. The inclusion of ergonomic features such as textured grips, balanced weight distribution, and user-friendly controls isn't just a design choice – it's a commitment to improving the lives of those who rely on these tools day in and day out.

In my pursuit of pushing boundaries, I celebrate the synergy between form and function, where design choices are guided by the scientific precision of ergonomics. By embracing these principles, I craft tools that are more than just instruments – they are companions, amplifying human capability while safeguarding well-being.

Ergonomics

Ergonomic Utility Knife

Knife Storyboard

Crafting storyboards is pivotal in ergonomic design, as they visually narrate the user's journey, illuminating how form and function harmonize to enhance usability and comfort.

Step 1: Prepare materials.

Before you begin, you will need to prepare a utility knife, safety equipment (goggles), and a cutting mat or work bench. By using a cutting mat, you will keep the blade sharp as well as protect the surrounding areas.

Step 2: Open the blade.

To open the blade, push down on the sliding button and push forward with your thumb. Adjust the blade to the appropriate length for your job.

Step 3: Measure your cut.

Use a straightedge to mark out your cut. Additionally, use the edge of the straightedge as a guide as well as for extra safety. It is always better to measure twice and cut once

Step 4: Cut your material.

Grip the utility knife using your dominant hand from the top with your index finger resting on top. Place the blade at the edge of your material and pull it towards you, cutting the material. It is easier to cut as well as much easier to control like this.

Step 5: Stay focused.

Stay focused on your piece as you cut to avoid any mistakes or injury. Use your off-hand to hold the piece steady. Make sure to go slowly and take your time.

Step 6: Close your blade.

Once you finished your cut, close the blade. To do so, using your thumb, press down on the slider button and pull back towards you until the blade is completely retracted into the handle. Whenever you are not using the knife, make sure the blade is retracted to avoid injury.

[Market survey]

Self testing.

To grasp the nuances of ergonomic design, I subjected the sample knife to real-world scenarios. While it met its functional goals, a few hiccups arose. With above-average proportions, I encountered difficulties.The knife's shape lacked intuitive familiarity, making side differentiation tricky. The undersized handle compromised control, worsened by uncomfortable edges during horizontal and vertical tasks. Slippery smooth ABS plastic further impeded handling.

Peer testing.

I tested the knife with my roommates to gauge their feedback. While the smaller roommate found it fitting, the larger one struggled with its size and control. Both faced issues with the knife's bottom corner digging into their hands during use. Initially, they grappled with the non-intuitive blade orientation. Both roommates agreed that the knife's unique shape and material choice made it challenging to handle and control.

Findings.

Throughout the rigorous testing process, a unanimous consensus emerged, indicating that the knife didn't inherently offer ease of use. The prominent concern centered around the sharp corners, which notably infringed upon comfort during operation, leaving an imprint on the hand. In the grand culmination of evaluations, it became evident that the knife's user-friendliness wasn't universally applicable. Its design, tailored specifically for a particular demographic (right-handed users), hinted at its limitation in accommodating a broader spectrum of users.

Market Survey

Concepts and Testing

I translated my initial concepts into tangible foam models, and then actively sought feedback for further refinement.

Within the design process, our concepts underwent rigorous testing and assessment across comfort, size, safety, and overall intuitiveness. From each category, we singled out the top two and bottom two knives. This exercise yielded a comprehensive collection of 17 reviews and opinions, providing a rich spectrum of insights. By conducting testing with a diverse range of subjects, we tapped into varied hand sizes, granting a more encompassing grasp of the market's collective needs.

The results don’t show a distinct winner, but however show areas in which each design excelled. Overall, Knife 1 was selected as the most comfortable and most intuitive, Knife 2 was selected as the best size, and Knife 3 was selected as the safest. Each knife design was taken in a different direction, so the next step is to take each aspect of the individual designs and combine them.

User Testing

Concept Refinement

Incorporating all prior feedback, I amalgamated the standout features from each concept into a unified direction, yielding the pinnacle of ergonomic utility knife design.

[Final concept]

The journey to my final concept was a process full of discovery. With helpful feedback as my guide and a focus on ergonomic excellence, I carefully examined each iteration. I blended the best features from different concepts to create a cohesive design that excelled in both user comfort and function. This step-by-step approach, fueled by enthusiasm and innovation, led to a final concept that not only met but exceeded expectations.

Utility Knife schematics

Final Concept

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