The lock and release principle of anti-theft buckle

Every time we pay for clothes, we often see cashiers unlocking the anti-theft buttons on the clothes. Just gently place the anti-theft buckle on the release and it will open. At this time, many people will be curious, which principle is used to unlock the anti-theft deduction? Let me tell you the answer below.
   One: The principle of the anti-theft buckle
        When we observe the anti-theft buckle up close, we will find that this product has two small grooves on the nail board. When the nail passes through the bottom, the steel ball inside the button will slide into the groove. Such an anti-theft buckle completes the function of the lock and cannot be opened by brute force.
        Two: The deduction principle of anti-theft deduction

        The anti-theft buckle needs to use the unlocking device to unlock. For this product, it is composed of two parts, one is a magnetic core, and the other is a magnetic ring. When the two are perfectly combined, a total eddy current magnetic particles will be formed in the center, allowing the anti-theft buckle to be easily unlocked.