Treasure Chest | Jewelry Box

Trophy Builder - Design & Print your Own Medal or Cup🏆 More Info Here 👇

A stylish 3D printed treasure chest featuring a customizable 3-digit combination lock 🔐. No glue or AMS needed – everything assembles easily with screws. Perfect as a jewelry box, decoration, coin bank, escape room prop, or fun interactive toy. Includes an Inner Box that automatically opens when you unlock the chest.

•  No AMS or glue required – all parts connect with screws 🔧
•  3-digit combination lock – choose your own code 🔐
• No additional parts! - Chest is completely printable
• Two size options available (Print Profile):
  • Normal: 208 × 134 × 154 mm
  • Small (for A1 Mini): 166 × 107 × 123 mm
• Optionally includes an Inner Box that opens perfectly with the lid
• Ideal as a jewelry box, coin bank, secret stash or stylish decor, escape games,  kids' play, or functional storage💍

⚠️ Note: This is a plastic model, not a real secure safe. With enough force, it can still be opened regardless of the lock.

Assembly instruction step by step👉:

Bill Of Materials

1. Attach 06_Lid_Front_Frame and 08_Lid_Back_Frame to the 02_Lid part using screws.
   Make sure not to swap them – the front and back frames are not interchangeable!
   Once mounted, it will be immediately clear which side of the lid is front and back.

   

2. Mount 05_Lid_Side_Frame and 11_Lid_Side_Frame_MIR (mirrored) onto the 02_Lid part.
   Make sure the threaded holes are on the correct side – they should face toward the hinges (see image below).

   

3. Attach 09_Lid_Lock to the 02_Lid part using two 20_Bolt-Longer screws.
   Important: Make sure to use 2× 20_Bolt-Longer!

   

4. Choose your desired lock code. You’ll find a detailed guide on how to set the code and assemble the lock correctly in a similar model 👉 https://makerworld.com/en/models/1599340-combination-lock-box-key-lock-box-numeric#profileId-1685491

   🛠️ Tip: If the 17_Dials feel too tight after inserting 18_Spacer, you can fix it by lightly sanding the 18_Spacer to increase clearance.
   Alternatively, you can reduce the Z-scale of the 18_Spacer in your slicer to make it thinner.

   

5. Insert the 19_Pin to connect the Box and Lid parts together.
   At this point, the main assembly should be complete.
   It’s up to you whether you want to install the 12_Inner_Box – if so, continue to the next step.

   

6. Use 4× 14_Shoulder_Bolt to attach 13_Lever and 12_Inner_Box.
   ⚠️ Do not overtighten the bolts – the mechanism might become too stiff to move properly!

   

7. Use the remaining two 14_Shoulder_Bolt to attach the 12_Inner_Box to the threaded holes in 05_Lid_Side_Frame and 11_Lid_Side_Frame.
   This connects the Inner_Box to the lid so it opens properly with it.

   

   👇If you like my model and would like more variations and support me at the same time! Check out my Patreon!👇