u/tmayn

Simple Secure Lid Latch Mechanism?
▲ 2 r/Onshape+1 crossposts

Simple Secure Lid Latch Mechanism?

This is one of those things where I'm sure there is specific vocabulary that I don't have.

My kids are always asking me for small game boxes, deck boxes, containers etc. and I know this is one of the best uses for 3d printing. But what always trips me up is making a container that has a secure way to keep it closed that also won't wear out in just a few dozen uses. These boxes will get thrown into backpacks and camp bags and I don't want the contents spilling out everywhere. The problem is, most of what I see online are compression fits or snap latches, and those seem like they’ll wear out fast.

I've seen latches like this and this but they're pretty bulky and the plastic will deform pretty quickly if they're used a lot.

So far the top idea I've had was a half screw with bolt but I hate dealing with threading especially if I have to model the fillets nicely to print in the right orientation.

My wishlist for an ideal latch:

  • Easy to replace when parts wear out (I love hinge designs that use raw filament as the pin)
  • Low profile, doesn’t stick out much, both to save space and to avoid breaking off easily.
  • No extra hardware, no screws, magnets, or other components, so it stays simple and cheap.
  • Doesn't have loose parts that can get lost

I know it's a wishlist but I'm sure this community has some great ideas.

u/tmayn — 5 days ago