EXTENSION ROD USED FOR A JACK ARM

摘要

An extension rod for a jack arm comprises a connecting rod having a first joint and a second joint formed at the respective ends of the connecting rod. A first locking hole and a second locking hole are formed in the first and second joints, respectively. The extension rod also comprises a lockup mechanism comprising an elastic body configured to connect to either the first joint or the connecting rod and a lockup bolt formed on the elastic body, and configured to engage the first locking hole.