I'm currently embedding a 42mm apple watch into my prosthetic arm.
I'm embedding it such that the screen is as close to flush as possible with the top of my forearm. By doing it like this, it leaves the side buttons underneath the surface. My plan is to put copies of the button / crown on top of the arm surface and then to control the watch that way.
The watch has 2 side buttons that are currently inaccessible.
1) Digital crown. This is the more difficult one. It spins and can be pushed in to click. So I need to transfer rotational motion and direct motion to the surface of the arm.
2.) An oval side button. This just indents in and springs back open. Transfer downward motion to sideways motion
Currently, I have a bevel gear / misaligment couple setup with springs that theoretically would work, but I'd like to see if there is a better /simpler solution.
Whatever interface or buttons that are placed on top of the arm need to be watertight. This precludes using lazy things like levers to push the #2 button.
I need someone to design the mechanism that will transfer the correct motions in such a small space.
You'll need to find the necessary pieces or make the necessary 3D models that I can print. I can also machine things, but its time intensive so I prefer printable solutions.