Security doors play a great role in life, and can be used as decorative building materials to protect the property and personal safety of themselves and their families. It is not an exaggeration to say that it is the first line of defense at home. For safety reasons, almost every household will choose to install security doors when decorating. However, in daily life, there will always be incidents in which the security door is locked and cannot be opened. What should I do if I encounter such a problem? Next, I will introduce you to the unlocking skills of security doors.

Unlocking skills of anti-theft door

1, fill the key slot.

Take out a set of things to unlock, including a small box with several pieces of tin foil in it. "This method has a long history, and locksmiths generally use it. Of course, thieves also know this technology. " Take out a lock, then put the tin foil in a special thing, and with the help of other similar things, insert it into the B-class lock core. Then fix the lock core on the small vice and shake it for 1 min, and the lock will be opened smoothly.

2. Tap the lock cylinder

First, pierce one end of a master key into the Class B lock core, and then hit the other end of the key with a hammer. Twist the master key as much as possible during hitting.

Of course, only six strokes with a hammer will open the lock core, which takes about 30 seconds. 3. Insert the locking tongue

What is needed is a rectangular plastic card. First, insert this card into the gap between the door and the door frame, then slide down to the position where the latch is located, and finally open the door smoothly-the whole process takes 6 seconds. "This method is the initial means of unlocking, but it is more common. This unlocking method is suitable for cases where the lock is not locked, locking the lock core or inserting the safety bolt is unsuccessful.

4, chewing gum unlock

Chew the gum and put it in the keyhole. Push the softened chewing gum into the keyhole with something. Because the quality of some old lock core marbles is usually short or short, they are "squeezed out" by chewing gum, and then something can be poked into the lock core to unlock it.

5, crochet unlock

Insert a special crochet needle into the lock hole, imitate the key unlocking principle, and unlock the lock by adjusting the position of the lock core marble.

6, cat's eye unlock

Pry open the cat's eye of the security door,

Use the "three-stick" and other things to penetrate into the room through the "cat's eye", and press the built-in door handle or lock outside the door to open the door. ? How to change the lock core of security door

The first thing to do when changing the lock core of the security door is to open the door, because the hardware such as screws is on the inside of the door. If you are locked out and want to change the lock cylinder, don't ask the security door how to change the lock cylinder.

It's called picking locks. The technology inside has violated the relevant laws and regulations of the country, so it cannot be taught. We will see how to change the lock when it is opened. First, unscrew the screws of the lower panel with a Phillips screwdriver, one above and one below, and then remove the inner and outer lock cylinder caps on both sides of the keyhole. Finally, remove the positioning screw of the lock core and keep it between the shop side and the lock tongue at the same height as the lock core. At this time, the old one can be removed and replaced with a new one.