backplate
nounUK /ˈbæk.pleɪt/
US /ˈbæk.pleɪt/
A flat piece that covers or supports the back of something.
He screwed the backplate onto the back of the computer case.
OTHER MEANINGS
2. A piece of armor that protects the back.
The knight fastened his backplate before the battle.
3. A plate on the back of a camera or phone that holds the screen or lens.
The phone's backplate cracked when it fell.
4. A metal plate behind a door handle or lock for support.
The locksmith fitted a new backplate around the keyhole.