Door handle with combination lock
Another simple invention from the category of "strange, why no one had thought of this before." It occurred to the designer Jess Han (Jess Han), who proposed to mount the combination lock directly in the door handle. Of course, we would not advise anyone to put such a lock on the front door of the house, but for a pantry or utility room in some public institutions, it will work fine. To protect against access for children in household chores, perhaps, too. It remains only to wait until this idea is launched into mass production. By the way, you can still make a modification that has a lock on only one side of the door. The main thing is not to put such a handle on the door in the toilet.
Source: Yanko Design