Hey all, I'm looking for a simple mechanism - I've got it on the tip of my tongue (so the speak) but can't quite figure out how it might work. Basically - imagine a box, with a push button on the top face and a pin/stud on the bottom face. When you push the button downwards the pin should retract upwards (think similar to those mechanisms in extending suitcase handles). So the pin needs to move in the opposite direction to button. I know I could do this with a sort of see-saw pivot, but I'm trying to keep it as simple and compact as possible. Has anyone got any ideas? Thanks!