In our final model of the spring loaded pull down mechanism that provides a private and comforting space when sitting on the couch, we modeled it 1/5 the size of the actual couch. This final model is twice the size of all our other iterations.
Our biggest challenge was calculating the math of two restrictions: 1) The length of the mechanical arm in order for the top drawer to clear the bottom. 2) The distance between the hole cut on the top and the hole cut on the bottom when the two drawers are sitting next to each other. To solve for these restrictions, we made diagrams and designed triangles within them using the Pythagorean theorem to solve for the missing side. The distance between both holes has to be 69mm and the length of the mechanical arm has to be 79.75mm in order for the top drawer to clear the edge of the bottom one when being pulled down.