礼物盒-Mechanical Gift Box (print-in-place)

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Several months ago, with the assistance of @Wuguigui, I completed the design of a gift/ring box. After gathering feedback on the model design, I upgraded the box's structure by refining the internal transmission mechanism. While maintaining its core functionality and capacity, I made the box more compact and streamlined. This redesign enables print-in-place without requiring secondary assembly, and virtually eliminates gear jamming issues.

After printing the box, remove some of the bottom stabilizing flaps. Opening and closing it forcefully a few times will make it smoother (you generally don't need to worry about breaking it from excessive force). Due to differences in material properties, some printed materials may have higher friction after printing. You can apply some WD-40 to the gaps based on actual conditions, which can significantly improve the situation.

PS: The four corners have smaller contact areas. Even with the added circular stabilizers, slight warping may occur. However, this generally won't significantly affect the overall model, so there's no need to worry.

 

In addition to the one-piece printed model, I've created a version where the internal items can be replaced. If you wish to customize the objects placed inside the box, you can design them yourself. The approximate internal dimensions of the box are: 25mm x 40mm x 33mm (not a perfect cube). I've created a 3D model of the specific shape constraints and included it in the print file (as shown below). Once you've finished your design, you can place it inside for comparison and adjustment. Additionally, you'll need to carve a 3.5mm-deep groove at the exact center of the bottom surface of your custom model. The specific shape is a regular hexagon with an inscribed circle diameter of 10mm. You can refer to the heart-shaped model included in the print files for reference.

By the way, you can also place a 10mm diameter round magnet in the groove so it doesn't have to stay in the box all the time：）