This project means extra funny work for the more daring of you readers ;-) indeed it's only a 3d model, and it has to be built.
I'm not very familiar with 3D printing, so I'm not sure about tolerance between moving parts. Anyway there is a fast explanation of my design and how to model it in 3DS Max. It's not a full modeling tutorial, because it would have been too long and complicated, but I'll show you the main phases and I'll attach the 3ds complete model in next step so you can see it in your 3D favorite software.

Step 1: Some Sketches

I'm sorry about the bad condition of my sketches, but I had trashed them before thinking to post them in the instructable ;-)
I also made a big mistake in modeling, which I could have avoided if I had looked better at my drawings (yes I know that you're thinking there is not much information in them!).
The project consists in a flat safe-box with a combination lock. It's very flat, about 8 mm thick, and it's arranged with two inner compartments. You can keep inside a lot of folded banknotes or a ring, a necklace, anything fits in a 4 mm drawer.
what materials do you use to make it
This is a very interesting concept Andrea. I think I might even try it on my printer. As I see it, some degree of accuracy can be attained by making the printer resolution fine (on one of mine that's 0.1mm). I think the 'nail heads' are going to be too fragile to print (or survive prolonged use), so my inclination is to let them print, but then remove them and use the locations to drill a small pilot hole and insert real nails epoxied down. OR...I would print it, do a test fit and then disassemble the whole thing and make a mould out of at least the bottom half and cast it in soft aluminum (such as might be derived from a bunch of fizzy drink cans). Hmmmmmm.....
Good, let me know if it works! You're right about the nails, they're very thin...
do yr research on that. could be any where from 50 bucks or more but do yr research tho
umm 1 problem is thst u need to put yr idea in either copy write or a public common license b4 some tries to patent yr idea. an u lose wat ever profits u might might make!!
and how much that costs?
seems like you'd be able to crack the code by applying pressure and feeling for the pins to enter their slots.
Not at all, since it works as many other simple locks: <u>all the slots</u> should be aligned to let the pins moving, which are all the same piece together with the cover ;-)
if all the holes and all the pins were perfectly aligned that would be true, but nothing is perfect. your blueprint may be perfect, but designs don't translate into real life without flaws. that's why there are things like quality control and the lemon law.
Actually alignment between pins and holes don't affect vulnerability of the lock. The essential detail to make a similar functional lock is the absence of reciprocal play between disks and the good alignment between nails axis and grooves tracks. That will make 6 pins keeping the other 2 pins (in this case) on a trace, also if they are near the holes. That's the same principle of the almost totality of traditional locks, the more the pins (ad disks) are, the safer the lock is. <br>Of course a 3D printed gadget can't be perfect (and is not due to any quality control) but I'm sure that it could be a good challenge, you can always smash it since it's made by plastic ;-)
didn't your english teacher ever warn you about excessive wordiness?<br>nothing you just said actually contradicts my point. <br>yes, more pins would obviously make it more difficult to defeat the mechanism.
You need to take this to a patent attorney. This would be a good kickstarter project
Do you think that? I'll research about that.
A pretty interesting design Andrea, if I don't build this, at least I can draw inspiration from it!
Excellent work. Protect it. One idea for an improvement, if someone else hasn't suggested it, is to use four different symbols around the edges where the single alignment indicator is. So, instead of the notch, you might have N, E, S, W for compass points, or simple shapes. Only you know which of the four you used to make the password. <br> <br>I see it as novel on a small scale, but a larger-scale safe, maybe three feet across, with bearings in the codex wheels, and deeper, of course, flush mounted to a wall. You could have ten wheels or more to make the password all the harder. Wheels that big you could add numbers and symbols, as well. <br> <br>As for the 'construction notch,' you can lose it by making the base in two parts, and a jig. Assemble and join them together using whatever method would apply (screws, glue, weld, epoxy, etc.)
Great idea! If someone actually creates this, please, PLEASE post the results!
WOW!! Love the concept, if you ever make a few I will be waiting!! :P
all right, italian tradition is to never donate a wallet empty... which bank-note do you want inside? <br>;-)
Haha, any!
One big improvement I could see being made is if you could figure out a way to build this without having the thing with the nailheads in the middle. If I put a dollar in there, the nail heads would have to punch through it in order to close it. Perhaps you could make it so that the ridge thing folds out, or (even better) stays on the lid somehow when it is opened.
You have to fold the banknotes in order to put them in one half (I've taken measurements referring to a 50&euro; note), in the other half you can keep coins or something else... maybe there is a better design, but it would be a completely different project ;-)
amazing, would like to have... your on to something with this idea.. Reminds me of these small puzzle boxes I use to buy but this actually has a useful application
Yes I also love those puzzle boxes!
OOH this is a really neat idea! So very clever! I want to see this in action. nice work, I'm assuming you are entering the contest, I will be voting for ya. :)
Actually, althought the contest gave me the idea, I didn't entered it because I didn't use 123D but 3DSMax... thanks anyway! :-)
Well darn, it's still really cool! :)
clever! So are the first two photos just a rendered model? It looks real!
Yeap! Nothing real yet :-)

About This Instructable




Bio: I'm an Italian freelance structural engineer, graphic designer and photographer. I'm also investigating electronics, robotics and science in general. I enjoy hacking and ... More »
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