Door guard unlocked due to missing parts

"I went out to take out the trash and when I came back, the door guard was on."

The client went out to take out the trash and when he came back, the door guard was on. When I asked about it, it seemed like he had been in a wobbly state recently. The door guard must have moved due to the force of closing the door. This is a common phenomenon.

At some point, the stainless steel ball in the latch mechanism lost its effectiveness, and attempting to force it back on would have caused it to break.

This time we will use the plate to unlock it. As expected, the stainless steel ball was missing. After that, the client repaired it by pasting it with tape. However, the replacement work was postponed due to cost reasons.