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Mouth Guard Box For My Brother

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  • Mouth Guard Box For My Brother

    Recently, my bro came to me to ask if I could print a box to hold his mouth guards (apparently, he grinds his teeth while sleeping). The guards do come with containers but he finds them too large. For example, he has a drawer in his bathroom to hold toothpaste, toothbrushes, etc., but the mouth guard container is too tall to fit. He has a mouth guard for use at his regular home, 1 for travel, and 1 for his Florida house, and would like a new container for each.

    I started out with a simple 2-part box, kind of like some jewellery boxes:

    Click image for larger version

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    The container on the left is the 1 that comes with the guard. My design's lid slides down over the bottom & is about 1/2" shorter.

    I then created a new design, one that's hinged:

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    I felt this design was an improvement, but the hinge is larger than needed and is completely outside the box. The lift tabs do help, but it's hard to know which side has the latch, so I refined the design:

  • #2
    Click image for larger version

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    If you look closely, you'll see that the back walls of the 2 halves are much closer together in this design, making the overall width shorter.

    Click image for larger version

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    This shot shows the thumb dimple & latch. The dimple helps identify where to press to unlatch & helps prevent your thumb from slipping while pressing to open.

    Click image for larger version

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    Pretty obviously, a closeup shot of the latch. The angles of the sloped sides are 40 degrees.

    Click image for larger version

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    The counterpart to the latch: the notch that catches the latch.

    Overall, the box works really well. I printed it with the EcoTough Natural filament I got from in Canada (I still haven't found anywhere in the US where I can get this filament). I chose this filament because it is strong (it's PETG) but has a level of flexibility & resilience I don't find in regular PETG; and, it's food safe. The flexibility really helps with pressing the dimple to open & close the box.

    My bro is very happy with the boxes. He showed 1 to a neighbor and she said, "He made that??".


    • #3
      Very cool design. Nicely done.

      Print in place stuff is the one thing I did not do, beside stuff that combines parts in one print and both parts need to be broken apart after printing.


      • #4
        Thanks. The 'bottom' half (the 1 with the 3 hinge parts and dimple) has the hinge pin as part of it –– there is no gap between the pin & the hinge segment. This means the pin can never loosen or come out. And, because the printer only has to span the gap between 2 hinge segments, rather than the whole width of the box, it's much more 3D printable. I suspect it just wouldn't work if it had to try to span 50+ mm.


        • #5
          Excellent, Ender5! Designing print in place hinges is taking it to the next level.