How would the toggle button go back into the "ready to read a coin hitting me" position? Do you need to count multiple coins, or are you waiting for just one? Anyway, if you are doing the conventional multiple coins slot that can judge which type of coin was placed into it, heres a design... shitty pictures I know, but hopefully you get the idea. All you need is 3 layers of plexiglass about 1/4 inch thick, so that the coins always fall in on their rims... anyway, here is the doodle I made last night if your interested (let me remind you it would cost you almost nothing, and if properly made would work quite nicely)
(Dunno how to scale pics on here... sorry for the huge size)