This multipurpose hand prosthetic is designed for people without fingers so that they could perform some basic activities. While there are plenty of such projects online, they are mostly either too simple or are too expensive and too complex for cheap mass production. As an Indian, I have designed this especially for people living in poor countries where this prosthetic can be distributed very cost effectively by health agencies.
The arm clamp is detachable so that you can make your custom clamp according to your comfort and needs.
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Note: The model I printed came out quite bad because of my broken printer. I have made quite a lot of design changes. However, I haven't had the time to test those changes. So it would be amazing if anyone could print this and give me some feedback in the comments.
With this, people without fingers should be able to:
- Use Pens and Pencils
- Use Cutlery
- Use Toothbrush
- Hold cups
- Hold bags
- Use touchscreens
- Use 4mm Hex tool bits and interchangeable screwdriver sets
I got the insipiration after stumbling different assistive devices on Instructables and Thinigiverse . These are:
Adapted Pen/Marker Holder by shadowwynd
- A FDM 3D printer
- 3D printing Filament of your choice. Preferably PLA and ABS.
- 3D print of files given below
- 2x 8 mm nuts and bolts.
- Padding of your own choice for the clamp.
I am also uploading a version without the cup holder.
I am also uploading the CATIA, STEP and IGES file for those who want to customize this for themselves. You can use softwares like Audodesk Fusion, Solidworks or any other CAD package to edit them.
Step 1: Printing the Parts
Software used: Repetier
Infill: At least 20 percent
Make sure auto support generation is on.
I used PLA to print this. You can choose any material. Although, make sure that it is not too hard and brittle.
Step 2: Assembling the Prosthetic
You can stick the nut at the bottom using glue.
I used a M5 machine screw and I found it quite uncomfortable to use.Alternatively, you can print M8 Allen or hex nuts and bolts from following source:
Step 3: Making the Touchscreen Stylus
There are many different ways to make the stylus. Due to time constraint and my printer malfunctioning, I haven't been able to make this. However, I am putting some other Instructables to make one.
I will describe here the simplest way and my favorite way to do it:
1) Take a small piece of aluminum foil.
2) Attach it with a piece of wire.
3) Wrap this around the stylus tip and stick it with tape.
4) Extend the wire to the clamps.
5) Add a small piece of metal to the other end of the wire.
6) Whenever you want to use, attach this metal piece to your body and the stylus will start working