This is a removable replacement clip for the Instax (11) Mini Polaroid door.

The original clip is pretty prone to breaking as it is made of a thin flexure. This one is heavily inspired by the original design, which I emulated based on some of the sparse photos online, as I failed to find any existing models.

Since it is still a thin flexure, I used PETG for my design with fine quality and 100% infill. It takes about 0.5g of material, thus printing multiples is not really an issue should one fail after some use.

Judging by the fact that Instax Minis do not seem to change their overall design that much from year to year, it may be possible that this clip fits other models as well, though I own none of them to truly verify this.

You may want to change the orientation to lay flat due to geometrical conditions. In general, a flexure is stronger if it's printed lengthwise, as in that direction, in does not shatter due to delamination. If you see more than a couple failures, printing it on its side may help with strength.