US Patent 10406942 Slide rail device for vehicle

In a slide rail device for use in a vehicle , a lock spring support portion of an upper rail includes an upward-downward movement restriction support portion. The upward-downward movement restriction support portion includes an open holding portion which is open at a top thereof and holds a supported portion of a lock spring and an uplift prevention projection which is formed projecting into the open holding portion so as to overlap the supported portion of the lock spring, which is held by the open holding portion, in the upward and downward directions.