What's a camera protector case?

I mean, I have a Nikon D3100 and want to hook it up to a fig rig to shoot some longboarding, but if I accidently fall down on my longboard going over 20 mph, I don't want my camera to be ruined.So, is there a case that protects the whole case except for the lens? Kind of like an iPhone case, except for DSLR's?

About the only thing I can think of would be an under water case. Know this, these cases can be more expensive that the camera you put in them.

But also explore around for the kind of case you're actually looking for. I've not seen one but that doesn't really mean much.

I do not think you can really get a protective case for a camera like that. It is going to have to fit pretty well, and it would probably make changing the sense hard.

I recommend looking at the GoPro cameras though.