Ziyi's
DESIGN
PORTFOLIO
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Arm
attached
multitool
Product Design
Additive Manufacturing
PROJECT
OVERVIEW
Most existing multi-tools revolve around the Swiss Army knife or bulky stamped metal cards. This project introduces an innovative, modular, wearable multi-tool that is fully 3D printed and operable with one hand, designed to improve both convenience and ergonomics.
DESIGNED FOR
The James Dyson Foundation
ROLE
Team of 4
As Co-Product Designer
YEAR
2024
DESIGNED FOR
Singapore University of Technology and Design
The James Dyson Foundation
CREATED WITH
Figma
Design
ideology
Innovative
Prioritize originality over copying existing solutions, focusing on unique and purpose-driven design.
Ergonomic
Go beyond functionality by creating an experience that is intuitive and easy to use with one hand.
Modular
Emphasize customization, allowing users to adapt the product to their personal needs and preferences.
UI/UX
Design
With an innovative, ergonomic, and modular design theme in mind, multiple draft designs were created using cardboard..
Tool
Design
The design process focused on individual tools first, each featuring unique mechanisms and creative ergonomic design.
Tool
testing
Through rigorous testing, iterative adjustments, and multiple rounds of prototyping, the design was refined to achieve optimal tolerances and enhance ergonomic comfort.
Base
Design
After designing all the tools, a base was created to hold them together and allow users to easily select the desired tool.
Base
mechanisms
To achieve the desired functionality and aesthetics, research on various mechanisms guided the design.
Voller 1.0
Award
recognition
Voller excelled in all criteria, winning the 2024 JDF 3D Printing & Prototyping Award.
It was also showcased at InspireCon 2025, where our team presented it to President Tharman
Voller
redesign
After designing the first prototype, the usability of Voller was further explored in real-life scenarios. The goal focused on bridging the gap between traditional hand tools and multitools by providing an ergonomic, modular solution for everyday DIY tasks and quick repairs.
Concept draft of Voller 2.0
Key
improvements
Enhanced Ergonomics
Intuitive Mechanism
Visually Appealing
Award
recognition
Voller 2.0 is designed for fully one-handed operation. All operations follow natural, intuitive hand movements. Additionally, The base has been reduced in volume to make it more compact, allowing even users with smaller hands to operate it smoothly.
The base has been redesigned from a round shape to a hand-contoured form, providing a more comfortable fit in the palm.
Mechanical
Redesign
The main base, mounted on the back of your hand, contains a rotating tool wheel. Once pressed the button, a tool slides down a rail to the palm side of the hand. To return it, simply twist your wrist and let gravity guide it back.
Testing &
Application
Tolerance presents the biggest challenge in 3D-printed prototypes, requiring multiple trial-and-error adjustments to achieve the ideal settings. Each tool was tested in real-life situations, leading to fine-tuning of the rail position for maximum ergonomic performance.
To enhance practicality, all tools were designed to be modular and interchangeable. A standardized connector enables users to create and share their own custom tools.
