TPU Bridge for Glasses

Our friend off another yacht was suffering with his prescription sunglasses, as the rubber pads that protected his nose from the metal frame of the bridge had perished and collapsed. This could be a problem when we are in such a remote location.

I was able to identify the shape of the metal pads and designed a shape that I thought could be made on the printer with the soft flexible TPU filament. I wrote a module to make the shape of the metal pad, and then made the shape by (in the 3D CAD software) rubbing a sphere around the outside of the pad shape.

$fn=90;
module elipse() {
    scale([1.8,1,1]) cylinder(1.1,3.4,3.4);
}

difference() {
    minkowski() {
        elipse();
        sphere(1.2);
    }
    elipse();
    translate([0,-2,0]) cube([15,4,1.5]);
}