Some clothes will have an anti theft buckle on them, what is its principle?

The work of anti-theft buckles and anti-theft signs in supermarkets and shopping malls is actually very simple, and the induction coil in it will send a signal to alarm when passing through the induction door.

The inside of the anti-theft magnetic buckle is mainly composed of a self-locking device and an induction coil. Its interior mainly includes: springs, iron rings, steel balls, and steel nails.

When the nail is inserted, the iron ring and the ball inside the magnetic buckle squeeze the steel needle downward under the elastic force of the spring. There is a circular groove on the steel needle, and the surface of the steel ball is just stuck in the groove of the steel needle. This is why we pull out the anti-theft magnetic buckle by hand, and it will become tighter and tighter!

The anti-theft buckle is equipped with a coil and a capacitor, and the alarm at the door has two parts, left and right, which is equivalent to two large coils, one of them is responsible for transmitting the signal and the other is responsible for receiving the signal. When the anti-theft buckle enters the detection door, the coil in the anti-theft buckle cuts the magnetic field, causing the current change of the receiving detection door, thereby triggering the alarm. Then send out an audible and visual alarm.

This alarm system is called EAS system, which is a radio frequency anti-theft device, and also has a popular name is electronic goods anti-theft system.

It is what we commonly call the soft label. It has a barcode on the front and a sticker on the back.

It's a miniature coil, and now it's all in one. Supermarket cashier.

The scanner will be used to degauss the soft mark of the normally paid goods, and the soft mark will be invalid after demagnetization, and it will not be detected by the security door after passing through the security door. This is disposable and cannot be reused. Generally, it is used on more expensive milk powder, and this label will be attached to prevent theft.

With this anti-theft mark, it plays a very big role in the probability of losing items in supermarkets and malls, and it is also a living example of how technology can play a role in our lives. By understanding how this item works, we also have a better understanding of the technology around us.

To prevent clothes from being stolen by others, when there is this anti-theft buckle on the clothes, the alarm will sound when you walk to the door.

It's that others will be called if they want to steal it, and it can be said that this design is more bizarre, specifically locking the location of the person, and it will also make a scary sound.

Prevent guests from not paying. This button will ring when you go through security, and when you pay, the cashier will pick it up for you.

1. Touch the anti-theft buckle with a magnet and it will fall off. Use a hammer to smash open the plastic shell, and then take the scissors and stick in and stab the coil. Use a lighter to soften the raised part of the anti-theft buckle, then pick it open with a knife, and then pick out the ring inside and the steel ball that wraps the nail, and it falls.

Take out the pliers, stretch open the side of the small head of the anti-theft buckle and stuff it into the part of the pliers used to cut the wire, and cut it hard. Use the spiral knife to open the red wine and gently turn it a few times around the small hole, and you're good to go. Use a screwdriver to pry open the hole along the side along the seam, and it will open in a minute or two.

2. The anti-theft buckle is composed of steel needles, plastic shells and lock cylinders, and the lock cylinder is actually a simple device formed by three steel balls, a steel ring and a spring, and the steel balls are normally closed by the spring thrust, and the steel balls are tightly buckled in the gaps of the steel needles when the steel needles are inserted.

What is the principle of the anti-theft buckle on the clothes in the mall?

What is the use of the anti-theft buckle in the shopping mall, what is the principle, and why it can't be opened even if you use brute force.

The anti-theft buckle is composed of a three-ball cylinder lock cylinder plus a small circuit, the three-ball cylinder lock cylinder will squeeze the steel needles into a locking shape, about 530n or so force, the small circuit and the anti-theft antenna at the entrance of the shopping mall react with each other, that is, the principle of magnetic induction to generate an alarm.

Suck it off with a strong magnet, if not, you can only go to a closed iron house, and the buckle will naturally fall off, (because the earth's magnetic field is at work),

There is a product on the top of the anti-theft buckle**.

1. First of all, you have to wrap the part of the anti-theft buckle with an old towel, only expose the anti-theft buckle outside, and then use a lighter to burn the top of the anti-theft buckle, which is easy to ignite, and it is not easy to ignite it with a candle It is also possible, but the lighter will be very hot, pay attention to safety.

2. Be sure to wrap your clothes in a towel, otherwise it will be easy to burn out. When the top is burned, about a minute or so, use a screwdriver.

Pick the plastic with a soft top, you can pick out a small spring, and then you can also find that inside is a small button that can be turned. At this time, it is necessary to continue burning for a while. About half a minute.

3. Burn it, break the inner part of the plastic with a screwdriver while it is hot, you can open the buckle in the middle, and then a few small steel balls and a steel sleeve will fall out, which is the squeeze of these things so that you can't pull out the nail.

4. At this time, you can open the old towel, remove the last nail, and then you are done, this method is simple and practical, and you don't need to remove the road fee.

5. The last thing to take out the nails is to pay attention to the use of gloves.

Precautions: 1. Be sure to wrap your clothes in an old towel, otherwise it is easy for sparks to fall off your clothes.

2. Be careful not to burn your hands, the plastic is very hot when it is soft, and the skin will fall off as soon as it touches your hands.

If there is a strong magnet at home, about 10 pieces are enough, put it on the protruding part of the anti-theft buckle (in fact, it is the lock cylinder), you can open it, and the simplest is to use diagonal pliers, there is a gap between the steel needle and the anti-theft buckle, cut it off, be careful of clothes.

Take a pair of pliers and twist it to open it, and it is easier to change the cone with a slotted cone, as long as you twist a seam, you can pry it along the seam.

Inside is a needle that wraps the nail with four round balls (about one millimeter in diameter) that jams the radial groove of the needle. Open normally and use the magnet to suck open and press the spring of the 4 balls, and the needle will be pulled out smoothly.

We're using the violent opening method here, and we can do it in half a minute without hurting the clothes. I just opened one and looked at it, hehe.

It's not that complicated, grab the clothes, don't throw them, throw that button on the ground, and then you'll see a needle, just take it off.

Go to the garment factory near your home and ask if there is a complete outfit, it is estimated that there are many of them. Like the supermarket, you can suck it down as soon as you suck it up.

If you can't smash it, don't break your clothes.

Find a magnet and smash it on the round head, and then it opens.

Use pliers to clamp the round bulge and twist it off to pull out the pin.

With a special unbuckled magnet.

There are two principles of anti-theft buckles commonly used on clothes, and the corresponding unbuckling equipment is also different.

1. Three-ball lock cylinder or 4-ball lock cylinder, this kind of unbuckle is generally made of magnet with strong magnetic force, and the magnetic range is 4500gs-16000gs domestic ordinary magnetic buckle can be opened with 4500gs.

However, there are also customers who order the anti-theft buckle of the strong lock cylinder, which must be opened by using the corresponding magnetic anti-theft unlocker, which generally requires a magnetic 12000gs unlocker, and a special shape of the magnetic buckle needs a professional unlocker, such as shell anti-theft buckle, and golf anti-theft buckle should use the following shape anti-theft unlocker.

There are also super lock cylinder anti-theft buckles to be opened with a super magnetic unlocker, such as checkpoint anti-theft buckles or the ink anti-theft buckles used in Uniqlo to use the following super magnetic unbuttoners produced by Beijing Jinshi Weida Electronics.

2. There is also an anti-theft buckle that is not a three-ball or a four-ball lock cylinder but an anti-theft buckle of a spring card, which can not be used with a magnetic unbuttoner, but needs to use a special unbuttoner, the most common is the shoe type anti-theft buckle used in the zara store.

The nail removal method of the anti-theft label is magnetic; Use a magnet with higher magnetism to align the lock cylinder position of the anti-theft tag; The magnet will suck the steel ball inside the anti-theft tag downward, and then the steel needle will be separated from the lock cylinder of the anti-theft tag, and the garment and the tag can be separated;

The magnetism of the magnet needs to be more than 4000 gs; Some labels use super strong lock cylinders, and the magnetism of the nail extractor needs 10000gs to take the nails;