Design
\label{design}
Origami-folding are located at the bending parts of the finger in the mechanical system. The flexibility of the material and the kirigami folding will provide a force that is equal and in opposite direction of the force exerted by the drive mechanism. A wire mechanism will be used to drive the mechanical system using servomotor as the system only requires one degree of freedom at one time. Together, the system will provide a simple mechanical system that provides strength for stroke patients during the rehabilitation process.
Design of Mechanical System
A literature review was done prior to the design to obtain the average dimension of the fingers. However, it is observed that different academic papers had different target group during the research. The research of Obi \cite{obi2016hand} research mainly focus on populations on south-eastern Nigeria. The research of Ladda et al \cite{ladda2013new} mainly focus on populations in India. The research of Lee \cite{lee2010hand} has a detailed measurement of each finger, but the dimension of the hand is taken from a pianist, which may have a longer length of fingers as compared to a normal person. In spite of that, the research provided by Chen et al \cite{chen2013constraint} was been used as the main reference for the design of the prototype.
As such, aside from the angle of movement that was obtained from research papers by Chen, the design of the mechanical system was based on the physical dimension of the writer’s finger (Table.\ref{PhysicalDimension}).