Prosthetic Hand for designers to experience

Prints (0)

Description

Summary

The Modular e-NABLE Research Platform (MeRP 1.0) is a modified wrist-actuated prosthetic hand that can be worn by able-bodied people for use in their day-to-day activities. This allows prosthetic hand designers to improve their designs by actually using the products they design. Designers can share the experience of people who will use products they create.

Note: This was an early design in my e-NABLE research and many elements of the design can be improved.  It has recently evolved into the e-NABLE Prosthetic Emulator.

The MeRP 1.0 straps onto the user’s forearm with a “gauntlet” that supports a prosthetic hand below the user’s hand. The user actuates the fingers of the prosthetic by flexing his/her wrist which causes the prosthetic hand to move, and strings running through the prosthetic fingers like tendons cause them to create a grasping movement.

The modular nature of the MeRP 1.0 allows the user to try different designs of hands, fingers, thumbs, gauntlets and actuating mechanisms to evaluate the pros and cons of each design. For more information about the e-NABLE prosthetic hands that are created on 3D printers and provided to children (free of charge), see http://enablingthefuture.org/.

Credits:

A remix of https://www.youmagine.com/designs/rit-e-nable-arm-v0-43#!design-information. The MeRP 1.0 design was based on a prosthetic arm designed at Rochester Institute of Technology by e-NABLE volunteers and on other open-source designs shared within the e-NABLE community.

Instructions

  • Use 1/8 inch carbon fiber rod to connect the Gauntlet to the Hand. http://www.amazon.com/Carbon-F... (make sure you don’t order direct from China, as it may be on a slow boat and take a month).
  • Print the Gauntlet halves in PLA flat on the printer hot bed (90C) and fold it around a form while it is still warm, right after it s taken off of the bed. I used an oval container from Crystal Light drink mix for a form.
  • Hinge pins are rivets that are made from 1/8 inch filament and melted on the end with a soldering iron. (Small $10 packs of 3mm filament sticks can be obtained from 3Doodler if your printer uses 1.75mm.)
  • Grasping bar on the back of the hand is also fabricated from 3mm filament. Bend corners with heat-gun or flame and weld in place with a soldering iron or 3Doodler.
  • The thumb module is attached to the palm module with pins that are also made from 1/8 inch filament.

Design Files

File Size

left_palm_merp_11.stl
491 KB
finger_set_merp_10.stl
2.37 MB
left_chassis_merp_10.stl
80.9 KB
finger_merp_10.stl
377 KB
gauntlet_bracket_merp_10.stl
25.1 KB
adjuster_bottom_merp_10.stl
71.4 KB
adjuster_set_merp_10.stl
191 KB
right_thumb_merp_10.stl
327 KB
gauntlet_right_merp_10.stl
81.7 KB
left_thumb_merp_10.stl
328 KB
right_palm_merp_11.stl
492 KB
thumb_merp_10.stl
375 KB
left_thumb_pivot_merp_10.stl
88.6 KB
proximal_phalange_merp_10.stl
109 KB
adjuster_top_merp_10.stl
73.1 KB
gauntlet_left_merp_10.stl
87.3 KB

Comments

Your browser is out-of-date!

Update your browser to view this website correctly. Update my browser now

×