Finger-Type Switch Holder—SI-13

For (With Whom)

People with ALS who have voluntary finger movement and can operate a switch.

Why

With severe disability, posture changes with the activity, such as lying in bed or sitting in a wheelchair, and there was no set way to fix the switch device being used, so it was sometimes hard to find a place to set it up. We wanted to create a situation with high reproducibility of the setup.

How

We measured the dimensions of each part of the finger and confirmed the position of the contact point that presses the switch, and made it to suit the individual user. A micro switch holder for operating a switch with the fingers.

Outcome

There was little particular effect on the person's switch operation itself, but the trial and error each time the switch is set up decreased, and activities now go more smoothly.

Materials Used

PLA

Approximate 3D Print Weight

For 1 finger: 16g, for 3 fingers: 36g

Print Settings Overview

Print time (1-finger type) = 1 hour 32 minutes, (3-finger type) = 2 hours 31 minutes, Nozzle diameter = 0.4mm, Layer height = 0.2mm, Infill = 30%, Temp = 200°C, Speed = 60mm/s, Supports = yes

Accessory Items and Everyday Goods Information

Micro switch, Velcro tape