A chin guard is mainly there to keep your helmet on.
Protect
Protect
they guard each other
"El guardia" means "the guard". The verb "guardar" means "to protect" or "to guard".
The cast of A Chin He Loved to Touch - 1927 includes: Al Cooke Lorraine Eason Kit Guard
The cast of The Chin He Loved to Lift - 1927 includes: Al Cooke Lorraine Eason Kit Guard
A guard
guard
to protect the coastal towns
to watch over the people or to protect the people from harm
the helmet Alternative answer: the structure that cupped the chin specifically is called the Bevor. Several helmet types, such as the great bascinet and armet would protect the chin without a bevor, however.
Better known as a bollard, a post guard (or guard post) is a short vertical post meant to prevent access and protect assets.