Hinged Chest with Working Lock and Wood Texture

thingiverse

**There will be no more updates to this page. [Go to the new GitHub page](https://github.com/DrLex0/print3D-hinged-locked-treasure-chest) for the latest updates.** My godson has some kind of obsession with collecting small things in small chests, and he wanted a chest with a working lock. So, for his next birthday I took athey's [Small Hinged Treasure Chest](https://www.thingiverse.com/thing:27635) and designed a lock mechanism for it. Of course it is the most basic lock possible with only one possible key and picking it is trivial, but it is functional. I also spiffed up the overall looks of the chest with extra details like the excellent wood texture from the [OpenForge Wooden Floors](https://www.thingiverse.com/thing:1585586) by devonjones. The hinge has been made slightly beefier to reduce the risk of it breaking. To unlock the chest, rotate the key counter-clockwise and open the lid while keeping the key turned. The lock cannot be left in the open position, closing the chest automatically locks it. [This video](https://youtu.be/TNOXzw1voPk) demonstrates how the chest works. I made three different key designs, although the skull key will probably be the most popular with little (and big) children by far :) Assembly is rather straightforward but the parts must be printed and mounted accurately for the lock to neither fail to close, nor be sloppy. See the images for instructions. On a well-calibrated printer the parts should only require minimal post-processing to make them fit. If your prints tend to be sloppy, some extra sanding and scraping may be required. See the post-printing section for more details. The dimensions are 76 × 46 × 57 mm for the bulk of the chest, and 76 × 51 × 58 mm with the hinges and details included. It should be possible to scale up the model slightly, but you may need to scale up the latches a tiny bit more in two of the three dimensions to keep them a tight fit. If you want to print the chest at 200% size, print the models with **Size200** prefix. These are already upscaled to 200% (meaning about 152 × 102 × 116 mm), and have been modified with reduced wall thickness and appropriate tolerances for the size. I haven't printed this larger model so I cannot guarantee it will work perfectly. Feedback is welcome!