Compound bows just refer to bows that are made of more than one material. Some can fold... but never in use, and never while strung.

There is one bow in that link that I saw that folds, (the browning folding bow) and alot that can be taken apart.

The idea of a bow that folds into something else is silly for several reasons. The first being it wouldnt ever be able to fold while strung, and the act of stringing and unstringing a bow is not something you can really do quickly and over and over again.

The structural integrity is also something to consider... that harp won't have any flexion, that bow would really have the effective range of a bow half it's size... which is awful.

And mainly the sheer extra weight would be arduous at best. Long bows and Recurve bows have a draw strength usually around 100 pounds. Having to draw 100 pounds of weight while holding that harp up is not going to be an easy thing to do.

Bows work because of the tension they hold... being able to fold it up or change it into something else while it's strung is just not going to happen, and trying to design something around that premise just seems feeble.

Blah, blah, fantasy, make believe--no!... Just, no.