This tricky present has a hidden latch mechanism that will keep it securely closed until you twist the topper.

https://youtu.be/6htE_PI6QCk

Printing

For a square boxes you will need

• 1 square_lid
• 1 square_base_[small/medium/large]
• 1 square_spring
• 2 square_latch
• 4 square_base_[small/medium/large]_ribbon
• 4 square_lid_ribbon
• 1 gear
• 1 Topper from this project or any other
• Twist Lock Box Project

For the flat boxes, you will need

• 1 flat_lid_[medium/large]
• 1 flat_base_[medium/large]
• 1 flat_spring_[medium/large]
• 2 flat_latch[medium/large]
• 4 flat_base_ribbon
• 2 flat_lid_[medium/large]_ribbon_short
• 2 flat_lid_[medium/large]_ribbon_long
• 1 gear
• 1 Topper from this project or any other
• Twist Lock Box Project

For the rectangle boxes, you will need

• 1 rectangle_lid_[medium/large]
• 1 rectangle_base_[medium/large]_[short/medium/tall]
• 1 rectangle_spring_[medium/large]
• 2 rectangle_latch[medium/large]
• 4 rectangle_base_ribbon_[short/medium/tall]
• 2 rectangle_lid_[medium/large]_ribbon_short
• 2 rectangle_lid_[medium/large]_ribbon_long
• 1 gear
• 1 Topper from this project or any other Twist Lock Box Project

All parts can be printed without supports.

The spring works best if it's printed with enough perimeter lines to make the arms of the spring solid. This works better than just increasing the infill % because perimeter lines will flow in the direction of the spring arms.

Make sure to print the correct number of lid ribbons and base ribbons.

Assembly

Assembly is the same as the original Twist Lock Trick Box. Watch this video for the complete process.

Make sure to pre-tension the sprint by one gear tooth This will assure that the latches have a strong hold on the base. This is also necessary for the alignment of some toppers.

Make sure to glue the spring and topper If you do not fully secure these parts, the mechanism may become detached while in a locked state. I recommend using either super glue or 3D Gloop!, but hot glue can work as well.

Can I sell copies of this?

Yes! This project was shared under the Creative Commons - Attribution license.

This license allows selling copies, but you must provide proper attribution, as detailed in the license itself.

Please note that any other projects linked here (remixes or related projects) may have a different license. Please respect those licenses.

This license applies only to the model files (STL, 3MF, STEP, F3D) included in this project. It does not apply to photos, videos, my logo, or other supplemental graphics attached to or displayed with this project.