Establishing a new association to a human-like hand is beneficial to one who lost a limb. A wearable hand helps to create a new visual influence for users. The wearable hand coordinates feels of a user moving a light weight object to facilitate adaptations to a new functional hand.
Vista Wearable 2.0 is a light weight robotic 3D printed assembly. It is effective to build one. Elements of the Vista Wearable include 3D prints, electronics, accessory parts, and codes. Drawings of the 3D prints are shown below.
It will take hours to print all these parts. Please contact us for a part list if you would like to build one.
There are five connectors to connect a thumb and each finger to a palm base.
There are five tension rings for adjusting positions of a thumb and each finger on a palm base via elastic cords.
There are five pulleys to engage a thumb and each finger to their designated servos via fishing lines.
There are five proximal segments for a thumb and each finger. Four middle segments are for each of four fingers.
There are five fingertips and five fingertip joints for a thumb and each finger.
A distal arm section connects to a palm base by two small wood screws.
A middle arm section connects to the distal arm section by two small wood screws.
A proximal arm section connects to the middle arm section by two small wood screws. The proximal arm section contains a window and two slots to receive a control box.
There are two half parts of a control box to enclose a micro-controller board and electronic parts. There is a small window at the top side of the box for a push button.
This palm base (approximately 70 mm in width) is printed in one unit having tunnels, openings and cut outs to interface five micro servos, electrical wires, fingers and a thumb.
The following accessories are individual parts one can purchase from suppliers at marketplace.
Five micro servos (270 degrees) used to move four fingers and a thumb
Elastic cord (0.8 mm diameter) used to support attachments of each finger and a thumb to a palm base
Clear monofilament fishing lines used to engage each finger and a thumb to five separate pulleys
Two extension springs are fitted to a fingertip joint at one end and to a connector at the other end. Spring's OD is approximately 2.7 mm.
USB c to micro adapter connects to a control box via the micro adapter end and a battery bank via the c adapter end
A battery bank with minimum 5000 mAh is used to power on Vista Wearable 2.0. A USB cable is used to charge the battery bank and its c type connecting end connects to a USB c to micro adapter.
What is inside the control box?
Hardware: A micro-controller board, connectors, a push button and a circuit board
Software: Code installed in the micro-controller
Grasp a small and very light weight object using the Vista Wearable.
Improve coordination by moving a small and light weight object to complete a task within a set time.
Make new associations and connect feels of grasping using the wearable arm for better adaptation.
Vista Wearable 2.0 provides a competitive solution for at home exercise and training for those who lives with a missing limb. Using a human-like wearable hand for grasping exercise improves coordination and balance. Better adaptation and feels to use a functional arm are possibilities by practicing simple grasping tasks at home.
Your support enables us to improve Vista Wearable and build new adaptive aids for amputees.
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