This is something i've been working on for a long time, It was the reason I initially bought my 3D Printer. I've always hated how pointy my keys were in my front pocket, and how it took me a few seconds to find which key I needed.
I wanted to make something to keep them in an organised layout, and solve these issues, but the solutions online, even in the 3D printing community, didn't really do everything I wanted, although this came close.
I also wanted to have some storage attached, as if i was already going to have a fairly bulky rectangle in my pocket, i didn't mind it being a bit bigger and having a lot more functions.
This is the latest iteration of several designs, and the most complicated yet, however it is still a 'work in progress', as i'm planning on adding features and refining the design, but this will be a slow process as I'm very happy with it currently.
- Small multi-purpose box (Designed to hold a folded UK £20 note, plus however many Paracetamol, Ibruprofen, antihistamine and Rennie tablets I can fit. Can also hold anything else small enough though!).
- 4mm hex bit / screwdriver holder and socket.
- Usb slot (only designed to fit this USB stick).
- Latches on the USB slot, and both containers with magnetic ejection for the 4mm hex bit container.
- Up to 3 standard keys, but will need modifications or shims to fit most.
- (planned) an ultrabright LED torch.
- 5x magnets embedded into one face of the keyring to help find screws when dropped on carpet.
- Tesco & Sainsburys (supermarkets in England) reward card barcodes, cut and press fit into place.
Bill of Materials
The 'Top' piece should be printed with the outer face down, the 'Bottom' piece printed with the outer face up.
The other parts should be fairly obvious, but will work in most orientations.
I strongly recommed printing with "Support - Everywhere", and "Support interface - Enabled" and set to a reasonable depth, as the overhangs on the internal cavities in the 'Top' piece will cause the inserts to not fit if drooping at all.
Very little, if any finishing should be required, if printed correctly, possibly a light sanding to give a matte look would work well.
The only issue I had with finishing was removing the support from inside the 4mm hex bit holder, where I had to screw a long wood screw the length of the support, and pull as hard as I could using some pliers, before the support would release.
The thicker 'top' piece should be put together first, by inserting the springs into the retainers, and then putting the latches down in front of these.
The USB latch is tricky to get into place, but by putting the end of the lever and the latch through the outer wall of the top piece, and then twisting the latch base slightly, it should pop in snugly.
The cover for this section can now be screwed in, and the bolts press fit into the outer face of the top.
The screws should be fed through the lower piece, and the keys aligned as desired, then feed the two upper screws through the middle piece, and then through the top piece.
The USB and USB insert should also be put into the cavity for it during this process, oriented so that the latch catches in the open side of the USB.