There was a point in time when The Locked Room was probably referred to as "that storage room in the basement" or "the basement closet" or something along those lines.
At that point in time I imagine it might have looked something like this:
I wouldn't really know for certain though because as far back as I can recall it looked like this:
The Locked Room acquired its title when my parents began using it as hoarding space for the many toys they wanted to prevent us from accessing. Particularly those irritating toys with unbearably chipper faces that sing or talk when you press a button.
Often times these toys would malfunction and start singing/talking at any given time of day without having their button pressed, making them 100% more likely to wind up in the Locked Room
our parents' means of keeping us out
to
our means of keeping toys which we determined were creepy and/or evil inside.
We generally exiled freaky baby dolls, disconcerting clowns and various objects we established were possessed by demons
Years later no one ever bothers to lock The Locked Room anymore but somehow it's kept it's title.