Hi, ! A zimmer frame is a walker, basically. The Zimmer name just comes from company based in Indiana (Zimmer Holdings) that took the basic walking frame style and tweaked it. Sometimes, people specify that a Zimmer frame is a walker with four stationary legs (no wheels), but the term Zimmer can also just mean any style of walker to some folks.
So, long story not short at all, Zimmer frame is just another term for a walker.
I hope that helps! And, I hope you are able to get a walking aid that works best for you and your needs.
Best, Erin, Team Member.