In the past, when people opened a shop selling clothes, clothes were often stolen. Today, almost every clothing store has special anti-theft measures, and one of the most common ones is the anti-theft deduction for supermarket products. Don't look at the magnetic clasp, but if you want to pull it apart with brute force, few people can do it. Do you know why?
What is the principle of the anti-theft buckle in supermarkets? In fact, there are not many things in this kind of thing. It is divided into two parts, one is a nail, and the other has three steel balls, one spring, and An alarm.
When working, I use this straight nail with several grooves and insert it into the anti-theft buckle of supermarket goods. After inserting it, the nail will squeeze the beads into the slots at both ends At this time, the card slot and the card slot on the nail work together to hold this card in the middle. At this time, the tension spring will also be against the bead, so that the bead can bite the anti-theft ring tightly, if it is pulled by external force.