What to do if the door lock wo n’t open

Posted by sere on March 6th, 2020

I believe that many people have encountered the situation where the door of the house is locked in their lives. It is too expensive to call a lock-unlocking company. So what is the reason why the door cannot be opened? Let ’s take a look at my analysis.

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First, it is because the safety latch button inside the door is loose. When the door is closed with too much force, the safety latch is shaken. The lock cylinder can be turned with the original key, but the door cannot be opened.

2. Some people, because someone was at home and there was something at the door, first lifted the safety bolt, and forgot it for a while; when they closed the door hard, the oblique tongue of the lock forcibly closed the door without contraction.

Third, it is that there are sensible children and elderly people with Alzheimer's at home, accidentally put the safety plug on at home, and it will not open the safety plug to cause people outside to unlock it with the key. Open the door.

The above situation occurs in several types of anti-theft doors, including ordinary three-segment split locks (three safety door locks) and automatic door locks (self-closing locks) and AB card bar mortise door locks. The method is for your reference.

The door lock of the three insurance splits is covered with a safety bolt and the door cannot be opened with a key. Solution:

There are two types of safety bolt buttons on the lock box inside the door of the insurance security door: one is a twist-type button, and the other is a push-up button. The latter method can only deal with button-type insurance.

The above method can handle this type of failure lock with a safety bolt up to more than 90%. Another stupid method is to use an electric drill, and use an electric drill on the door to drill a circle of eyes on the lock box. Then, you can use the drill to pry it big, you can directly see the insurance mechanism baffle inside, and then use a screwdriver to move the insurance piece, or you can install a special part for the iron door on the front of the electric drill. The round multi-tooth drill clamp for the installation of the lock clamp hole is drilled through the hole of the door lock and projects directly into the lock box on the back of the door. After drilling into a large hole, it is easy to move. Steel plate of safety bolt.

If the door has been locked inside, the door is narrow, and the above method does not work, you can use the lock puller to pull out the lock first; after pulling out the lock, you can pass through the door through the door. The hole where the lock is installed sees the lock box. There is a hole on the lock box where you can insert the flat square rotating pin of the lock. This hole is not large. It is flat and then you can use a homemade 7-shaped steel wire. Line to make, flatten with a hammer in front of your head, and then use a file to modify it). When making this tool, you can find an old lock box to try it out, and you can find it more accurately in practice Position of the safety piece. At this time, you can insert the tool from this hole to pull the safety piece inside the lock box. As long as the safety piece is pulled out, you can open the lock, or you can make another one. The motorcycle wire is made as shown in the picture. The tool is used to turn the bolt. So two of them are stretched together inside, and the toggle is turned while turning the safety plate. Sometimes the safety plate has been activated. Still flicking, some locksmiths have made such tools, Use a flat-head screwdriver to cut off the part in front of the head, and then open a groove. Use an electric drill to connect the eye and connect a section of iron bar to the groove. This iron bar is as large as the concave part on the top. It ’s smaller enough to fit in. Before this iron bar head, punch holes as large as the holes on both sides of the screwdriver groove, and then screw on, or use a wire hammer. The head of the iron bar can be made in advance. Measure the distance just to the position of the lock button's safety button. Use the file to file some small tooth shapes at the position where the safety button is contacted, so as to facilitate the movement of the safety bolt with friction.

The weakest point of the spherical door lock is the connection between the lock tongue and the lock body. When we open the outer cover, the entire lock body will shake. At this time, there is a certain gap at the connection where the 7-head tool can be inserted. The gap is small and difficult to insert, which can flatten the 7-head. The length of the 7-head is preferably 0.7 cm. As long as the pull part of the lock body is pressed by 0.7 cm, the lock can be opened. The material is preferably made of steel wire, and the round body material is easy to rotate.

怎么 How to remove the spherical door lock

First step: first loosen the disc that is close to the door, and twist it counter clock to make it back.

Step 2: Twist the ball (that is, the part holding the hand) a few times, look at the small hole on the top, and insert it with a small object to hold it firmly, so the part you can hold can be pulled. Out.

Step 3: At this time, you can take out the disc that has just been loosened, remove the two screws inside, and then pull it out from the door.

Door lock purchase method

1. When choosing a lock, pay attention to the industry brand. Don't just look at the price one-sidedly, you should choose a large enterprise product with strong scale, stable product quality, and reliability, and buy it from the brand agent's hardware store. It is necessary to identify whether the lock product has a factory name, factory address, trademark, and whether there is a recent inspection qualification report issued by a professional quality inspection agency.

2. The appearance of the lock should be clear, the surface should not be rough, and it should be comfortable. The lock can be opened and rotated flexibly, the locking device should work, and there should be no sense of failure when it feels good, and the security performance is better.

3. When choosing a lock, you must first choose a lock that is consistent with the opening direction of your door. Secondly, pay attention to the width of the door frame. Handle locks are not suitable for doors with a door frame smaller than 90mm. Generally speaking, the door locks are large luxury locks with large panels. Whether the thickness of the door matches the lock is also an important option. To lock the door.

4. The material of the lock should be moderate when buying, and it should be firm and reliable when you feel it. Don't choose all kinds of locks made of low quality and low quality materials. The main materials of the panel and handle are zinc alloy, aluminum, precision cast stainless steel, sheet stainless steel, precision cast copper, and sintered copper. The surface treatment of the panel and the handle mainly includes polishing, sandblasting, wire drawing, electroplating chrome, copper, light gold, PVD, etc. The main material of the lock body is a cold-rolled iron plate or stainless steel in the outer box, stainless steel or copper in the tongue, and other parts of zinc alloy or iron. There are also all stainless steel lock bodies. At present, most of the lock cylinders are made of copper.