Zimmer frame
ldoce_359_aZim·mer frame /ˈzɪmə ˌfreɪm $ -mər-/ trademark British EnglishBrE 
a type of metal frame that people use to help them walk if they are old or ill 捷迈助行架
a type of metal frame that people use to help them walk if they are old or ill 捷迈助行架