Flexy Index

SUMMARY

This is a remix of a remix of the Kinetic Hand. It is a prosthetic index finger for a child (age 3) which now only shares with the Kinetic Hand the profile of the finger tip and the principal of a flex material spring. The parent design (Aline's Index) uses the distal finger section, flex hinge and grip pad from the Kinetic Hand and has a hard (PET-G) palm piece. This version is printed as one piece in flex material - but with a PET-G ring or tab to move the prosthetic index with the middle finger. Although more challenging to print, this provides a softer interface against the users hand and assembly is limited to attaching the PET-G ring or tab with a single M2 screw.

DESIGN COMMENTS

The recipient's hand was modelled using 'makehuman' http://www.makehumancommunity.org/), adjusted to match photos provided. The hand model was imported into Fusion 360 and the external surface profile of the makehuman model was used as the internal surface of the palm piece.

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