Multipurpose elastic toggle latch

Here's a simple design you can use in your everyday life to keep stuff secured in place. Just add rubber bands according to your needs and you're good to go.
This simple toggle latch was thought for securing metal tubes on a wooden board, using rubber bands or o-rings.

The forward protuberance on the latch helps you align the piece while closing since the pulling force from the rubber bands might be difficult to handle. Once closed, the same pulling force allows the system not to be opened by mistake since it tries to stay closed.
If a further safety level is needed, the little hole both on the Clip and Latch can be used for metal wire to be passed through, blocking the whole thing closed.

Printing settings are not set, you can use whatever you think works better. Just keep in mind that the latch is subject to quite some stress so do not make it too brittle.

The components are to be printed with the following orientation in order to gain the best results:
- Clip: upside-down with supports, holes are to be the farthest from the printing surface;
- Latch: print on a side with supports under the fwd protuberance and the rubber band groove;
- Fix: Print on a side, again with supports under the rubber band groove.

0.2 or 0.3 mm layer height work fine. Any material can be used.
(Picture models are made out of PLA with 0.3 mm layers)