This one is so much fun… give someone a present they can’t open until you give them the code. This gift box has an integrated lock system with a 4-dial combination, each dial offering numbers from 0 to 9. Which means there are 10,000 possible combinations.  You can secure your gift and share the passcode at the perfect moment—whether it’s on Christmas morning, a birthday, or another special occasion.

No more sneaky peeks into presents before the big day! This gift box is as practical as it is fun, adding an extra layer of anticipation to gift-giving.

The entire lock system is incorporated into the lid of the gift box. The four outside “ribbons” on the top of the box are each a lock dial. You use those to the combination code which opens the box. Since there are 10,000 possible combinations you need to know it to open it. Then once the correct code is entered via those ribbons, the central ribbon can be turned to release the lid from the gift box body.

The main box of the gift box is quite simple and only has the snap-on ribbons to complement the box. At the top lip of the box are rectangular holes which receive the lock latches from the lid.

Everything is printed and no hardware or fasteners are required. You can change the lock combination anytime and over and over again.

The inside of the gift box is approximately 13cm (5″) cubed.

If you want to understand how it works or assemble one, please check out my video linked at the top.

Printing

Functional designs (such as this one) generally require more strength than non-functional designs and more strength than the typical default slicer settings provide, so please review your slicer settings carefully.

This product was designed for a 0.4mm nozzle, a 0.2mm layer height and the following settings:

• Wall Line Count = 4 ( 4 x 0.4mm = 1.6mm walls )
• Top and Bottom Layer Count = 5 ( 5 x 0.2mm = 1.0mm top and bottom )
• Infill = 40%, Cubic
• Detech Thin Walls = ON
• Ironing = OFF (not needed)
• Support = All required support is designed into this product
• Brim = NO (a brim can complicate details of print-in-place parts and parts printed close together – If you have to use a brim, set it to “outside only”)
• MATERIAL: PLA or PETG (any material should work fine)
• PRINT ORIENTATION: As per the STL files

Assembly Notes

There is a large piece of support incorporated into the Lid design. Please remove that after printing. This support requires that “Detect Thin Walls” is enabled in your slicer.

Once all the parts are printed I strongly recommend you view my video for assembly instructions.

The post Combination Lock Gift Box first appeared on logicalplanet.

I decided I needed to make some gift boxes and this is the first one. I think it is fun and entertaining but functional at the same time. This box locks and there is no key to open it. But you do need to know the secret… centrifugal force.

A series of weights inside the lid slide freely back and forth based on the boxes orientation (and gravity). Randomly at least one will always be forward (towards the centre of the lid). And, as long as one is forward, the lid can not be opened. So the secret is to spin the box which creates a centrifugal force moving all the weights to the outside (away from the centre). This frees up the centre sprocket to spin which the bow on top of the gift box is turned.

The ribbons and bow as well as all of the smaller mechanical parts print separately so you can colour the gift box however you want and do not need an AMS.

Inside the box is approximately 11cm x 11cm x 11cm (4.3″ x 4.3″ x 4.3″).

I have included some exploded diagrams to help show the inner workings but ultimately my video is needed to demonstrate how to build it.

On the main box, the side ribbons snap/lock into place and can not be removed once installed. This was intentional so that the user does not feel tempted to try to enter the gift box by any other means than the removal of the lid.

Printing

Your default slicer settings should be ok with the design except for the pegs and the hinge components. I recommend printing those with thicker walls and 100% infill for added strength.

This product was designed for a 0.4mm nozzle, a 0.2mm layer height and the following settings:

• Wall Line Count = 2 ( 2 x 0.4mm = 0.8mm walls )
• Top and Bottom Layer Count = 3 ( 3 x 0.2mm = 0.6mm top and bottom )
• Material = PLA or PETG (any material should work)
• Line width = 0.4mm
• Wall count = minimum 2 (0.8mm)
• Top and Bottom Layer Count = minimum 3
• Infill = 15%
• Detect Thin Walls = ON (this is IMPORTANT)
• Ironing = Not required
• Brim = NO (a brim can complicate details of print-in-place parts and parts printed close together – but you can add it if needed)
• Support = No
• PRINT ORIENTATION: As per STL files

Assembly Notes

Print support is incorporated into the lid (as illustrated) so be sure to remove that before attempting to assemble the gift box.

Assembly itself is fairly intuitive but I defer to my video rather than attempting to illustrate it step by step.

The post Spin Release Gift Box first appeared on logicalplanet.