Seems like I read a forum entry somewhere about a person who did not have the hand strength to unhook a chin strap on a standard bike helmet. Most helmets require that you be able squeeze in strongly to unhook a bike chin strap. My two helmets require a very strong pinching motion to unhook them. It never occurred to me that someone else would have this sort of concern.
I was in Walmart looking at all the bicycle accessories and wondering what I could use on my Rambler. Among the group of helmets I noticed a Schwinn Adult Hybrid Helmet. The strap connection is magnetic. It pops right into place and appears to be quite secure if you try to pull it apart, but if you push it to the side it comes apart without a great deal of force. I think they have figured out another way to make a chin strap fastener that's easy to operate.
If you are reading this post and see one of these helmets in a store please check it out. Examine it, tug on it, test it and see what you think. I was time limited and didn't think, at that moment, about posting this to a forum. When I go back I'll certainly do some more research and add my thoughts. If one of these makes it easier and safer for a trike rider then I've done a good deed for sure! 8-)