Door Security Guard

Before this, I installed seismic latch of model number called KSL - 3, but whether the sensitivity is too good or my water shop is unstable, it was locked by vibration when the door leaves the magnet latch, I closed the door to release it and opened the door again, so I bought this to escape from repeated stress called lock. Here, it was released from the stress without locking with a little vibration. However, when I tried applying vibration, the door was locked in a state opened for about several centimeters, so there is a feeling of uneasiness that things inside might fall from the gap at the time of the earthquake.