Third Thumb Changes The Prosthetics Game
INSIDER

Published on Mar 4, 2018

London-based product designer, Dani Clode designed a third thumb to change the way people think about prosthetics. Clode believes that prosthetics extent a wearer's ability. They shouldn't be regarded as a replacement to part of the human body. The third thumb is made from a series of interconnected parts: a hand piece, an attachment, cables, motors, and two Bluetooth controllers.

See more from Dani Clode: http://daniclodedesign.com/
https://www.instagram.com/dani_clode/

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The Third Thumb investigates the relationship between the body and prosthetic technology in new ways. It is part tool, part experience, and part self-expression; a model by which we better understand human response to artificial extensions. It instigates necessary conversation about the definition of 'ability'.

The origin of the word ‘prosthesis’ meant ’to add, put onto’; so not to fix or replace, but to extend. The Third Thumb is inspired by this word origin, exploring human augmentation and aiming to reframe prosthetics as extensions of the body.

How does is work?
The human thumb has a really dynamic movement, the opposing movements working together make the thumb more functional than a single finger. The Third Thumb replicates these movements by using two motors pulling against the natural tension of a flexible 3d printed material. The motors are controlled by two pressure sensors retrofitted into your shoes, under your toes, and communicate to the thumb via Bluetooth connection. The foot control is inspired by products that help to develop the already strong connection between our hands and our feet. For example driving a car, using a sewing machine, or playing a piano.

What is it made of?
The base working model design of the Third Thumb is made of three main 3d printed parts. The structural cover for the hand and wrist cover for the motors are both 3d printed in the rigid, smooth formlabs grey resin. The main part, the thumb is live-hinge based design, 3d printed out of the tough, 85a shore flexible filament, Ninjaflex. These parts are all connected via a bowden cable system, similar to a bike brake, made of teflon tubing and wire. 3d printing is perfect medium for this project, as it enables quick prototyping, customised designs for various hand sizes and one-off production.

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