Unnecessarily Complicated Coin Bank
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A coin bank with a settable 4-digit combination lock
- Ocena
- 0 / 5
- Polubienia
- 3
- Pobrania
- 4
- Wydruki
- 0
- Wyświetlenia
- 81
- Oceny
- 0
Aktualizacja u źródła:
Informacje o modelu
- Źródło
- Printables
- Kategoria
- Home Decor
- Licencja
- Creative Commons — Attribution — Noncommercial
I was bored, and had a random pile of change sitting around, so I decided to design a cool place to store them all. So what could have been a simple box or bowl turned into a screw-topped four digit combination locked piggy bank thing. It's entirely unnecessary, but kind of cool. So mission accomplished.
Some filing between cylinders 3 and 4, and between the central barrel and cylinder 1 may be required depending on your printer and filament's behavior due to relatively tight tolerances.
Assembly Instructions:
1) Align central barrel so that one of the screw holes is lined up with the triangle on the base. 2) Glue central barrel's tabs into the slots in the base.
3) Nest cylinder 1 over central barrel, then the other cylinders in order.
4) Gently work button plate into the top cover from the bottom, aligned so that the tab under it is aligned with the triangle on the top cover.
5) Using a weak adhesive for convenience, attach four compression springs of <8mm diameter and at least 13mm length to the indents in the top plate
6) Line up the springs with the indents on the bottom of the button plate and gently work the top plate into the top cover assembly from below until it is flush with the outer flange of the top cover
7) Aligning the triangles on top and base, press top cover assembly into the bottom assembly.
8) Use 4x assembly screws to attach the top assembly to the bottom assembly. The bank can now only be disassembled nondestructively if the bank has been opened.
9) Screw cap into the top, pressing down the button plate as needed so that the cap is as tight as it can reasonably be made with the four protrusions of the button plate slotting into the gaps in the cap. The bank is now locked.
To configure the combination:
1) Print nine configuration wedges of each type (1-4). Press each into the slots provided for them in each cylinder with the type corresponding to the cylinder number.
2) Leave one slot in each cylinder open. This open slot will be the number for that cylinder.
To open:
1) Align the number of each cylinder into which you didn't place a wedge with the triangles on the top and bottom assemblies.
2) Press down the button plate all around
3) While pressing down, grip and unscrew the cap. I've found this is actually much easier to do than I expected.