Unlocking the entrance U-shaped door bar (door guard)

"When I got home, the door guard was on."

Is there someone inside? It is said that the entrance door guard (door bar) was hanging. Upon further inquiry, it appears that this was caused by rushing out to work in the morning and slamming the door shut. There didn't seem to be anyone inside, so I unlocked it using the normal method using a plate. After unlocking the door, I checked the operation of the door guard and found that the stuffed animal was hanging on the bar. Also, the spring ball seemed to be getting looser. Apparently, when the door was forcefully closed, the weight of the stuffed animal caused it to close due to the pendulum effect.

You will need to replace it when the opportunity arises or fix it with tape.