I'm trying to find out what this common rotary detent mechanism is actually called. I see them in all sorts of cheap plastic toys, and I'd like to see if I can find them for sale, but I don't know what to search for! I modeled this one in blender for a personal project. If it's not clear in the image, the inner barrel has 4 springs that quantize the rotation of the outer ring. Is this (or something similar) something I could find in bulk, or are they always designed ad-hoc?
Pretty sure that is some kind of pawl and spring disconnect. Similar to what gives a bike casette the ratcheting connection, but yours is bi-directional like a ball detent.
Closest cheap thing I could find is a rotary selector switch. It'd have extra electrical connections that you may not want or need. They tend not to have many positions though; I've used an 8 position one that had nice ball detents.