"Without the key, it is too scary to open a lock in a few seconds." More than half of the burglary gangs that Changsha police smashed this year were technically unlocked. The police reminded the public to use locks with a high degree of safety and to develop the habit of locking the door. On July 16th, the Japanese newspaper reported that the doors and windows were all in good condition and the family was stolen. This caused the general public to pay attention to their own door locks. Do citizens understand the safety of their locks? What kind of lock is the least secure and the easiest to be targeted by a thief? Yesterday, the reporter conducted an investigation and interview, and asked the lock experts to teach the public to easily identify the safety of the lock by the key.
At present, the super-class C alarm lock cylinder with top-level anti-theft performance
90% of the citizens do not understand their own door locks
In addition to the protection of the guards, security and surveillance systems in the residential quarters, the security door locks of each owner's home are a vital line of defense for family safety. The reporter and the lock expert Lin Dong randomly visited 40 households. The results showed that only 4 households had a better understanding of the anti-theft lock, and 90% of the respondents did not understand the anti-theft function of their own security door.
Ms. Zhang’s family in the old residential area of ​​Xinmin Road has an anti-theft iron door in addition to the wooden door when she buys a house. She believes that “the two doors should be safe.†According to Lin Dong’s observation, Ms. Zhang’s family two The door locks are the A-class locks with the worst anti-theft performance.
"My home is a lock installed by the developer. The stainless steel key is heavy, and the lock should be of good quality." Ms. Chen, a real estate owner in Kaifu District, said. Many people have similar views. After seeing Ms. Chen’s key, Lin Dong told her: “Don’t look at the quality of the key, but it does not mean that the lock is safe. Your home is also a Class A lock. It can be used in a few seconds with a master key, tin foil unlocking tool, etc. Open."
Class A lock cylinder with single row of marble slot keys
Class A and Class B locks are easy to open
What types of locks are classified, and which types of locks have higher anti-theft performance? According to Lin Dong, according to the industry, the current locks on the market can be divided into A-class, B-class, super-B-class, C-class and super-C-class.
The internal structure of the A-class lock cylinder is simple, limited to the change of the marble, and the marble groove is small and shallow. The public distinguishes the shape of the key. The A-level lock key is mainly a key, a cross key, or a single-row marble slot. With tin foil and key molds, Class A locks can be almost "second".
The B-class lock that was subsequently introduced adds a blade structure to the A-stage lock marble structure. The key to the Class B lock has a double row of marble slots, and some also add a serpentine slot. Lin Dong said that compared with the A-class lock, the anti-theft performance of the B-class lock is indeed improved, but with the development of the unlocking technology, the B-class lock is also easy to be opened by the tool.
From Lin Dong’s usual experience of unlocking and changing locks, most of the residents in Changsha still use marble locks, and quite a few of them have A-level locks. For example, the A-level locks in the old residential areas are very common; the newer residential community developers are mainly equipped with A-class locks or B-class locks. Lin Dong emphasized that all the lock cylinders, that is, the lock core with the marble groove on the key, can be opened by the tool in just a few minutes no matter how complicated the modification is made. It is recommended to replace it.
Class B lock with double row of marble slot keys
Super C-class locks have the highest anti-theft performance
Starting from the super B-class lock, the design principle is completely changed, and the marble structure is abandoned, all adopting the blade structure. The key shape is a single-sided blade milling slot. When it was first launched, the anti-B technology of the Super B-class lock was turned on for 270 minutes.
Lin Dong said that a type of lock has been on the market for a long time, and the thief will find ways to study the unlocking method. Therefore, lock companies must also keep pace with the times, and have introduced C-class and super-C locks. Among them, the C-class lock key uses a double-sided blade milling slot. The Super C-class lock key has 6 blade milling slots, which are currently not technically open; and an alarm is set, and the thief will sound an alarm if it is forcibly unlocked. The Super C-class lock is the most advanced lock for the current anti-theft performance, making the thief discouraged.
Editor in charge: Liu Changqi
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