Door Closer for Pets

thingiverse

With my 3d printer came the opportunity to solve something that has been bugging me for years - my dogs never close the office door behind themselves, and always want me to get up to let them in and out of the office. I made this specifically to look obvious because it was mean't to be fun - I was even tempted to give it a little spray of gold highlights to make it look aged. It is designed to leave the door open just enough that the dogs can get there nose in and push the door open just enough. With a lighter weight, it closes slowly and does not make much of a noise - I added a black foam rubber bumper to just above the screw so that it would hit the top of the door frame first. You will also need an 8x16x7 bearing for the pulley... like the ones for rollerblades. At the top of the bracket, there are 4x5mm holes - these are for metal bars to go in as guides for the string as it moves from side to side as the door opens & closes and the angle of entry changes. I made these out of metal because of wear.. you could make them out of anything else. String length is up to you, but I suggest a lighter weight at the end of the string made of something soft because it will end up knocking against the door and make noise otherwise. Oh, and you will need a hook to attach the string to the wall just above the door frame at the corner - best to work out the exact location once the bracket is in the closed position.