Thanks @jrmichler, this has been really helpful!
One question, why would the force on the hook by the spring be negligible?
When in closed state, since the hook on the door will be held down by the other hook on the bottom, I thought the hook will be the only mechanism that is preventing the...
I am trying to design a small box with a hinged door/lid that opens with a torsion spring.
When closed, the door will latch onto a mechanism where the open button is, and when the button is pressed this mechanism will slide away, removing the latch out of the way so that the door can fly open...