Keyboard Typing Aid, U-Shaped Type—TA-02

For (With Whom)

People with upper limb impairment due to cervical spinal cord injury or similar conditions

Why

Self-help devices with similar usability already existed, but a lighter one with better fit and easier donning was desired, so we made one using a 3D printer.

How

We measured the thickness of the subject's palm and created data for a parallel U-shaped form, aiming for a device that grips the palm with moderate force when it is inserted, and printed it. Afterwards, to improve fit, we changed the design to a non-parallel U shape, and set three sizes (S, M, L) to accommodate subjects with different palm sizes. Attaching a urethane soft cushion to the tip allows typing on the keyboard without slipping.

Outcome

It was an effective self-help device for subjects who want to type with the forearm in a neutral position. Another advantage is that it is easy to put on, because it only requires inserting the palm and needs no fixation with a belt or similar.

Materials Used

Body: ABS

Approximate 3D Print Weight

S: 24g (left and right pair), M: 25g (left and right pair), L: 23g (left and right pair)

Print Settings Overview

Body: Nozzle diameter = 0.4mm, Layer height = 0.2mm, Infill = 50%, Temp = 250°C, Speed = 40mm/s, Support = Yes

Accessory Information

A hemispherical urethane soft cushion is attached to the tip.