I looked online quick and didn't find a picture that showed each end of the camera very well, but it reminds me of one I just got (Konishiroku Pearl) in that there's a lever (I guess that's what I'd call it) that slides up and then the camera back pops open.

If you post a picture that would be a help; I've bought cameras that had a particular feature that I had trouble figuring out, but eventually did.