Illume: A 3D Printable Prosthetic Hand

Revolutionizing Prosthetics with Innovation and Affordability

With an estimated 11.4 million people living with hand amputations globally, the need for functional and affordable prosthetic limbs is more crucial than ever. Illume aims to address this need by offering a neutrally controlled prosthetic hand with sensory feedback, all at a cost of less than $1000. This design breakthrough has the potential to transform the lives of individuals in developing countries, where access to prosthetic solutions is often limited.

One of the key features that sets Illume apart is its 3D printable nature. The design allows for easy assembly, with all parts designed to be put together in two-piece assemblies. This eliminates the need for complex processes requiring two hands, making it accessible to individuals with limited dexterity. Additionally, Illume incorporates a four-bar linkage as a finger joint coupling mechanism, enabling consistent movement and greater force at the fingertip compared to traditional tendon-based designs.

The realization of Illume is made possible through the integration of advanced technology. The prosthetic hand incorporates five motors and worm gears, enabling six degrees of freedom articulation. Each digit of the hand can flex and extend, while the thumb has the additional ability to oppose. The hand attaches to a socket that overlays the residual limb, and muscle signals from electrodes embedded in the socket are read and decoded by a machine learning algorithm. This allows for precise control of various grips, including hand open, close, fine pinch, 3 finger grasp, and rest.

Illume's technical specifications include a height of 220mm, width of 95mm, and depth of 25mm. These dimensions ensure a comfortable fit for users while maintaining the functionality and aesthetics of the design.

Cliff Shin, along with a team of talented individuals including Timothy Bretl, Aadeel Akhtar, Patrick Slade, KyungYoon Choi, and Michael Fatina, has overcome numerous challenges in the development of Illume. The use of micro motors and worm gears presented a unique approach to generate the necessary torque, while also ensuring the availability of components from hobby stores online to reduce overall construction costs.

Upon wearing Illume, users undergo a short training procedure to train the microchip in the hand to recognize muscle signals from sensors placed on the user's forearm. Once the hand associates the muscle signals with particular grasps, users can effortlessly control the hand by making the corresponding muscle movements. The elegant and anthropomorphic design of Illume enhances user acceptance while maintaining high functionality.

Illume was developed in Champaign, Illinois, USA, and represents a significant advancement in the field of prosthetics. Its affordability, ease of manufacture, and simplicity of maintenance make it an ideal solution for individuals in economically disadvantaged communities. By incorporating cutting-edge technology and addressing the unique challenges faced by amputees, Illume is set to make a positive impact on the lives of millions.

Cliff Shin's Illume has been recognized for its innovation and creativity, receiving the Bronze A' Design Award in Cybernetics, Prosthesis, and Implant Design in 2016. This prestigious award acknowledges designs that exhibit technical and creative excellence, contributing to improvements in quality of life and making the world a better place.