Plug in a plug (Type M)

thingiverse

I created this design due to having one more appliance than available plug space in my kitchen. So, I decided to modify a standard 3-prong-plug to accommodate another appliance. Theoretically, you could stack these endlessly, but surprisingly, this concept isn't widely adopted yet. You may not be able to replicate the exact design I used because plugs come in various shapes and sizes. However, my creation provides a solid foundation for experimentation. The only part I printed was the "cover.stl," while the remaining components were integral to the modified plug. I recommend purchasing a similar plug and adapting it to its existing shape. For the terminals inside, I utilized parts from an old multi-plug and a 9mm bullet casing for the earth pin, which I modified with a slot to ensure proper disconnection when inserting the top-most plug. Initially, I aimed to create the safest possible design. However, implementing a revolving mechanism that works in conjunction with a torsion spring to seal the holes when no appliance is plugged in proved too labor-intensive. As the inner pins are inaccessible without a tool, I opted not to pursue this feature further.