Experts explain how to choose to rest assured lock

“Help me find out, what lock is my home lock? Can we prevent theft?” “Which locks are anti-theft Super B-level locks?” For many days, many readers have called the 96333 hotline to consult the specific issues of anti-theft locks. Yesterday, the reporter interviewed the Changsha police and related lock experts. Zhang Hongjun, a senior researcher at Liuzhou, Guangxi, took photos to answer the questions.

Crack the lock cylinder in 5 minutes

Class A lock Class B lock can not stop the thief

On the evening of April 25th, Mr. Zhao, who lives in a building material market in South Second Ring Road, just returned home and found that his family was stolen: “The doors and windows are all good, but a check and found that the 8,000 yuan in cash and value at home is close to 1 Millions of jewelry were stolen."

“Theft of burglary cases generally takes place from 1 am to 4 am, 8 am to 11 am, and 3 pm to 5 pm in the afternoon.” The Yuhuating police station analyzed that in the latter two periods, the thieves were mainly Through technological unlocking, theft into the room.

“Now many cell-based lock cylinders are mostly equipped with anti-technological low-level A or B anti-theft lock cylinders. According to national standards, A-stage lock cores have a technical open time of 1 minute and B-stage lock cores have anti-technological open time. It took 5 minutes, but in a few short minutes, it was impossible to fight against the highly intelligent unlocking tools used by thieves. Commonly used A-class anti-theft locks were in the locked state. The thieves used tin foil to match the tools and could be turned on in just a few seconds. ”

Anti-technology open up to 270 minutes

Super B-level lock cylinder is the real anti-theft lock

"So we recommend the use of Super B-level locks, such as the gold point atomic B-type lock technology to prevent the opening time of 270 minutes or more, anti-violence to open for more than 30 minutes, lock replacement and upgrade to Super B-level mechanical lock cylinder can effectively control Technology sets locked in room theft." The police said, "At the same time we also reminded the owners to unlock locks to find the formal units for public security agencies to record, and to view the unlocked personnel qualifications, must not covet cheap believe that small advertisements randomly posted at the door, resulting in the installation is not Eligible locks or keys were stolen."

A-level lock

At present, the A-class anti-theft lock keys on the market mainly include a word key and a cross key. The internal structure of the A-stage lock cylinder is very simple, limited to the change of the marble, and the marble slot is small and shallow. Anti-technical opening time within 1 minute, the open rate is very high. The marble structure is a single row marble or cross lock.

Class B lock

Class B lock keys are flat keys with double row of marble grooves. The difference with class A locks lies in the fact that the key surface has more than one row of curved and irregular lines. The main types of lock cylinders are 3 kinds, computer double row lock cores, double row crescent lock cores, double-sided blade lock cores. Anti-technical opening time within 5 minutes, high open rate. With a strong twist tool, the lock cylinder can be opened within 1 minute.

Super B lock

The key shape is a single-sided blade inner slot or external slot key. The type of the cylinder is the side cylinder lock core. The Ministry of Public Security cannot detect the opening of the technology for 270 minutes. The regional open rate is zero (16 millionth). . The marble structure is a double-row blade plus a V-shaped side column lock; if you use a strong twist tool to open the lock cylinder, the inside of the lock cylinder is destroyed and locked up by self-explosion, resulting in failure to open.

Lock maintenance tips

During the use of the lock, during the regular (half a year or once a year) period or when the key is not inserted smoothly, do not use any liquid oil such as edible oil as a lubricant to prevent the grease from sticking to the pin springs. Turn it and it won't turn on. Usually you can use the pencil at home to coat the key, and then insert the lock cylinder several times to lubricate. In addition, professional lubricants and rust inhibitors for locks are also available. Some zinc alloys and copper locks that are mounted on the door for a long time will find "spots". This phenomenon does not belong to rust, but it belongs to oxidation. If this happens, just wipe with a surface wax spray. You can remove the spots.

How to pick and lock

The first move: buy the lock to see the key "teeth." The more teeth, the deeper the teeth, the more complicated the arrangement, the greater the difficulty of opening, the better the anti-theft performance.

The second measure: pick the lock on the weight of two, one to watch the lock cylinder. The heavier the weight, the better the quality of the lock cylinder and the more beads inside the lock cylinder, the better the anti-theft function.

The third measure: Select the lock cylinder to see the color, than the color to see work. The good quality lock core is electroplated and has a smooth surface and bright color. The dark yellow color is a copper core, which is relatively strong, anti-theft performance is good, the color of the lock cylinder is dark, and the zinc oxide is a kind of zinc oxide with air bubbles. The anti-theft performance is general.

The fourth measure: The anti-theft performance of the key inserted into the lock cylinder is poor. After the key is inserted halfway, rotate it clockwise or counterclockwise with 5 to 7 points and continue to press the key into the lock. The key of the card is used to illustrate the anti-theft function of the lock cylinder. Poor performance, the smooth insertion of the lock cylinder in the semi-rotary state shows that the anti-theft effect is good.