US Patent 11330900 Auto-locking adjustable bar and structure having same

Disclosed are adjustable bars and structures having adjustable bars. An adjustable bar includes an inner bar, an outer bar and a locking/unlocking mechanism to control relative movement of the inner and outer bars. The locking/unlocking mechanism includes a locking pin to be selectively inserted into a restriction hole of the outer tubular bar and a restriction member of the inner bar, thereby selectively restricting relative movement of the inner and outer bars in at least one direction. The locking/unlocking mechanism also includes a feature to prevent accidental release of the locking pin from the restriction member. Structures having such adjustable bars are easy and safer to use.